EXPORT_SYMBOL(blk_congestion_wait);
+/**
+ * blk_congestion_end - wake up sleepers on a congestion queue
+ * @rw: READ or WRITE
+ */
+void blk_congestion_end(int rw)
+{
+ wait_queue_head_t *wqh = &congestion_wqh[rw];
+
+ if (waitqueue_active(wqh))
+ wake_up(wqh);
+}
+
/*
* Has to be called with the request spinlock acquired
*/
If unsure, say N.
config NFS_DIRECTIO
- bool "Allow direct I/O on NFS files (EXPERIMENTAL)"
- depends on NFS_FS && EXPERIMENTAL
+ bool "Allow direct I/O on NFS files"
+ depends on NFS_FS
help
This option enables applications to perform uncached I/O on files
in NFS file systems using the O_DIRECT open() flag. When O_DIRECT
* (or otherwise set) by the caller to indicate that it is now
* in use by the dcache.
*/
-struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode)
+static struct dentry *__d_instantiate_unique(struct dentry *entry,
+ struct inode *inode)
{
struct dentry *alias;
int len = entry->d_name.len;
const char *name = entry->d_name.name;
unsigned int hash = entry->d_name.hash;
- BUG_ON(!list_empty(&entry->d_alias));
- spin_lock(&dcache_lock);
- if (!inode)
- goto do_negative;
+ if (!inode) {
+ entry->d_inode = NULL;
+ return NULL;
+ }
+
list_for_each_entry(alias, &inode->i_dentry, d_alias) {
struct qstr *qstr = &alias->d_name;
if (memcmp(qstr->name, name, len))
continue;
dget_locked(alias);
- spin_unlock(&dcache_lock);
- BUG_ON(!d_unhashed(alias));
- iput(inode);
return alias;
}
+
list_add(&entry->d_alias, &inode->i_dentry);
-do_negative:
entry->d_inode = inode;
fsnotify_d_instantiate(entry, inode);
- spin_unlock(&dcache_lock);
- security_d_instantiate(entry, inode);
return NULL;
}
+
+struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode)
+{
+ struct dentry *result;
+
+ BUG_ON(!list_empty(&entry->d_alias));
+
+ spin_lock(&dcache_lock);
+ result = __d_instantiate_unique(entry, inode);
+ spin_unlock(&dcache_lock);
+
+ if (!result) {
+ security_d_instantiate(entry, inode);
+ return NULL;
+ }
+
+ BUG_ON(!d_unhashed(result));
+ iput(inode);
+ return result;
+}
+
EXPORT_SYMBOL(d_instantiate_unique);
/**
hlist_add_head_rcu(&entry->d_hash, list);
}
+static void _d_rehash(struct dentry * entry)
+{
+ __d_rehash(entry, d_hash(entry->d_parent, entry->d_name.hash));
+}
+
/**
* d_rehash - add an entry back to the hash
* @entry: dentry to add to the hash
void d_rehash(struct dentry * entry)
{
- struct hlist_head *list = d_hash(entry->d_parent, entry->d_name.hash);
-
spin_lock(&dcache_lock);
spin_lock(&entry->d_lock);
- __d_rehash(entry, list);
+ _d_rehash(entry);
spin_unlock(&entry->d_lock);
spin_unlock(&dcache_lock);
}
spin_unlock(&dcache_lock);
}
+/*
+ * Prepare an anonymous dentry for life in the superblock's dentry tree as a
+ * named dentry in place of the dentry to be replaced.
+ */
+static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
+{
+ struct dentry *dparent, *aparent;
+
+ switch_names(dentry, anon);
+ do_switch(dentry->d_name.len, anon->d_name.len);
+ do_switch(dentry->d_name.hash, anon->d_name.hash);
+
+ dparent = dentry->d_parent;
+ aparent = anon->d_parent;
+
+ dentry->d_parent = (aparent == anon) ? dentry : aparent;
+ list_del(&dentry->d_u.d_child);
+ if (!IS_ROOT(dentry))
+ list_add(&dentry->d_u.d_child, &dentry->d_parent->d_subdirs);
+ else
+ INIT_LIST_HEAD(&dentry->d_u.d_child);
+
+ anon->d_parent = (dparent == dentry) ? anon : dparent;
+ list_del(&anon->d_u.d_child);
+ if (!IS_ROOT(anon))
+ list_add(&anon->d_u.d_child, &anon->d_parent->d_subdirs);
+ else
+ INIT_LIST_HEAD(&anon->d_u.d_child);
+
+ anon->d_flags &= ~DCACHE_DISCONNECTED;
+}
+
+/**
+ * d_materialise_unique - introduce an inode into the tree
+ * @dentry: candidate dentry
+ * @inode: inode to bind to the dentry, to which aliases may be attached
+ *
+ * Introduces an dentry into the tree, substituting an extant disconnected
+ * root directory alias in its place if there is one
+ */
+struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode)
+{
+ struct dentry *alias, *actual;
+
+ BUG_ON(!d_unhashed(dentry));
+
+ spin_lock(&dcache_lock);
+
+ if (!inode) {
+ actual = dentry;
+ dentry->d_inode = NULL;
+ goto found_lock;
+ }
+
+ /* See if a disconnected directory already exists as an anonymous root
+ * that we should splice into the tree instead */
+ if (S_ISDIR(inode->i_mode) && (alias = __d_find_alias(inode, 1))) {
+ spin_lock(&alias->d_lock);
+
+ /* Is this a mountpoint that we could splice into our tree? */
+ if (IS_ROOT(alias))
+ goto connect_mountpoint;
+
+ if (alias->d_name.len == dentry->d_name.len &&
+ alias->d_parent == dentry->d_parent &&
+ memcmp(alias->d_name.name,
+ dentry->d_name.name,
+ dentry->d_name.len) == 0)
+ goto replace_with_alias;
+
+ spin_unlock(&alias->d_lock);
+
+ /* Doh! Seem to be aliasing directories for some reason... */
+ dput(alias);
+ }
+
+ /* Add a unique reference */
+ actual = __d_instantiate_unique(dentry, inode);
+ if (!actual)
+ actual = dentry;
+ else if (unlikely(!d_unhashed(actual)))
+ goto shouldnt_be_hashed;
+
+found_lock:
+ spin_lock(&actual->d_lock);
+found:
+ _d_rehash(actual);
+ spin_unlock(&actual->d_lock);
+ spin_unlock(&dcache_lock);
+
+ if (actual == dentry) {
+ security_d_instantiate(dentry, inode);
+ return NULL;
+ }
+
+ iput(inode);
+ return actual;
+
+ /* Convert the anonymous/root alias into an ordinary dentry */
+connect_mountpoint:
+ __d_materialise_dentry(dentry, alias);
+
+ /* Replace the candidate dentry with the alias in the tree */
+replace_with_alias:
+ __d_drop(alias);
+ actual = alias;
+ goto found;
+
+shouldnt_be_hashed:
+ spin_unlock(&dcache_lock);
+ BUG();
+ goto shouldnt_be_hashed;
+}
+
/**
* d_path - return the path of a dentry
* @dentry: dentry to report
EXPORT_SYMBOL(d_invalidate);
EXPORT_SYMBOL(d_lookup);
EXPORT_SYMBOL(d_move);
+EXPORT_SYMBOL_GPL(d_materialise_unique);
EXPORT_SYMBOL(d_path);
EXPORT_SYMBOL(d_prune_aliases);
EXPORT_SYMBOL(d_rehash);
int
nlmclnt_proc(struct inode *inode, int cmd, struct file_lock *fl)
{
+ struct rpc_clnt *client = NFS_CLIENT(inode);
+ struct sockaddr_in addr;
struct nlm_host *host;
struct nlm_rqst *call;
sigset_t oldset;
unsigned long flags;
- int status, proto, vers;
+ int status, vers;
vers = (NFS_PROTO(inode)->version == 3) ? 4 : 1;
if (NFS_PROTO(inode)->version > 3) {
return -ENOLCK;
}
- /* Retrieve transport protocol from NFS client */
- proto = NFS_CLIENT(inode)->cl_xprt->prot;
-
- host = nlmclnt_lookup_host(NFS_ADDR(inode), proto, vers);
+ rpc_peeraddr(client, (struct sockaddr *) &addr, sizeof(addr));
+ host = nlmclnt_lookup_host(&addr, client->cl_xprt->prot, vers);
if (host == NULL)
return -ENOLCK;
#define NLM_HOST_REBIND (60 * HZ)
#define NLM_HOST_EXPIRE ((nrhosts > NLM_HOST_MAX)? 300 * HZ : 120 * HZ)
#define NLM_HOST_COLLECT ((nrhosts > NLM_HOST_MAX)? 120 * HZ : 60 * HZ)
-#define NLM_HOST_ADDR(sv) (&(sv)->s_nlmclnt->cl_xprt->addr)
static struct nlm_host * nlm_hosts[NLM_HOST_NRHASH];
static unsigned long next_gc;
nlm_bind_host(struct nlm_host *host)
{
struct rpc_clnt *clnt;
- struct rpc_xprt *xprt;
dprintk("lockd: nlm_bind_host(%08x)\n",
(unsigned)ntohl(host->h_addr.sin_addr.s_addr));
* RPC rebind is required
*/
if ((clnt = host->h_rpcclnt) != NULL) {
- xprt = clnt->cl_xprt;
if (time_after_eq(jiffies, host->h_nextrebind)) {
rpc_force_rebind(clnt);
host->h_nextrebind = jiffies + NLM_HOST_REBIND;
host->h_nextrebind - jiffies);
}
} else {
- xprt = xprt_create_proto(host->h_proto, &host->h_addr, NULL);
- if (IS_ERR(xprt))
- goto forgetit;
-
- xprt_set_timeout(&xprt->timeout, 5, nlmsvc_timeout);
- xprt->resvport = 1; /* NLM requires a reserved port */
-
- /* Existing NLM servers accept AUTH_UNIX only */
- clnt = rpc_new_client(xprt, host->h_name, &nlm_program,
- host->h_version, RPC_AUTH_UNIX);
- if (IS_ERR(clnt))
- goto forgetit;
- clnt->cl_autobind = 1; /* turn on pmap queries */
- clnt->cl_softrtry = 1; /* All queries are soft */
-
- host->h_rpcclnt = clnt;
+ unsigned long increment = nlmsvc_timeout * HZ;
+ struct rpc_timeout timeparms = {
+ .to_initval = increment,
+ .to_increment = increment,
+ .to_maxval = increment * 6UL,
+ .to_retries = 5U,
+ };
+ struct rpc_create_args args = {
+ .protocol = host->h_proto,
+ .address = (struct sockaddr *)&host->h_addr,
+ .addrsize = sizeof(host->h_addr),
+ .timeout = &timeparms,
+ .servername = host->h_name,
+ .program = &nlm_program,
+ .version = host->h_version,
+ .authflavor = RPC_AUTH_UNIX,
+ .flags = (RPC_CLNT_CREATE_HARDRTRY |
+ RPC_CLNT_CREATE_AUTOBIND),
+ };
+
+ clnt = rpc_create(&args);
+ if (!IS_ERR(clnt))
+ host->h_rpcclnt = clnt;
+ else {
+ printk("lockd: couldn't create RPC handle for %s\n", host->h_name);
+ clnt = NULL;
+ }
}
mutex_unlock(&host->h_mutex);
return clnt;
-
-forgetit:
- printk("lockd: couldn't create RPC handle for %s\n", host->h_name);
- mutex_unlock(&host->h_mutex);
- return NULL;
}
/*
static struct rpc_clnt *
nsm_create(void)
{
- struct rpc_xprt *xprt;
- struct rpc_clnt *clnt;
- struct sockaddr_in sin;
-
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
- sin.sin_port = 0;
-
- xprt = xprt_create_proto(IPPROTO_UDP, &sin, NULL);
- if (IS_ERR(xprt))
- return (struct rpc_clnt *)xprt;
- xprt->resvport = 1; /* NSM requires a reserved port */
-
- clnt = rpc_create_client(xprt, "localhost",
- &nsm_program, SM_VERSION,
- RPC_AUTH_NULL);
- if (IS_ERR(clnt))
- goto out_err;
- clnt->cl_softrtry = 1;
- clnt->cl_oneshot = 1;
- return clnt;
-
-out_err:
- return clnt;
+ struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
+ .sin_port = 0,
+ };
+ struct rpc_create_args args = {
+ .protocol = IPPROTO_UDP,
+ .address = (struct sockaddr *)&sin,
+ .addrsize = sizeof(sin),
+ .servername = "localhost",
+ .program = &nsm_program,
+ .version = SM_VERSION,
+ .authflavor = RPC_AUTH_NULL,
+ .flags = (RPC_CLNT_CREATE_ONESHOT),
+ };
+
+ return rpc_create(&args);
}
/*
obj-$(CONFIG_NFS_FS) += nfs.o
-nfs-y := dir.o file.o inode.o super.o nfs2xdr.o pagelist.o \
- proc.o read.o symlink.o unlink.o write.o \
- namespace.o
+nfs-y := client.o dir.o file.o getroot.o inode.o super.o nfs2xdr.o \
+ pagelist.o proc.o read.o symlink.o unlink.o \
+ write.o namespace.o
nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o
nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o
nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
#include "nfs4_fs.h"
#include "callback.h"
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_CALLBACK
unsigned int nfs_callback_set_tcpport;
unsigned short nfs_callback_tcpport;
+static const int nfs_set_port_min = 0;
+static const int nfs_set_port_max = 65535;
+
+static int param_set_port(const char *val, struct kernel_param *kp)
+{
+ char *endp;
+ int num = simple_strtol(val, &endp, 0);
+ if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
+ return -EINVAL;
+ *((int *)kp->arg) = num;
+ return 0;
+}
+
+module_param_call(callback_tcpport, param_set_port, param_get_int,
+ &nfs_callback_set_tcpport, 0644);
/*
* This is the callback kernel thread.
/*
* Kill the server process if it is not already up.
*/
-int nfs_callback_down(void)
+void nfs_callback_down(void)
{
- int ret = 0;
-
lock_kernel();
mutex_lock(&nfs_callback_mutex);
nfs_callback_info.users--;
} while (wait_for_completion_timeout(&nfs_callback_info.stopped, 5*HZ) == 0);
mutex_unlock(&nfs_callback_mutex);
unlock_kernel();
- return ret;
}
static int nfs_callback_authenticate(struct svc_rqst *rqstp)
{
- struct in_addr *addr = &rqstp->rq_addr.sin_addr;
- struct nfs4_client *clp;
+ struct sockaddr_in *addr = &rqstp->rq_addr;
+ struct nfs_client *clp;
/* Don't talk to strangers */
- clp = nfs4_find_client(addr);
+ clp = nfs_find_client(addr, 4);
if (clp == NULL)
return SVC_DROP;
- dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n", __FUNCTION__, NIPQUAD(addr));
- nfs4_put_client(clp);
+ dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n", __FUNCTION__, NIPQUAD(addr->sin_addr));
+ nfs_put_client(clp);
switch (rqstp->rq_authop->flavour) {
case RPC_AUTH_NULL:
if (rqstp->rq_proc != CB_NULL)
extern unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res);
extern unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy);
+#ifdef CONFIG_NFS_V4
extern int nfs_callback_up(void);
-extern int nfs_callback_down(void);
+extern void nfs_callback_down(void);
+#else
+#define nfs_callback_up() (0)
+#define nfs_callback_down() do {} while(0)
+#endif
extern unsigned int nfs_callback_set_tcpport;
extern unsigned short nfs_callback_tcpport;
#include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_CALLBACK
unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res)
{
- struct nfs4_client *clp;
+ struct nfs_client *clp;
struct nfs_delegation *delegation;
struct nfs_inode *nfsi;
struct inode *inode;
res->bitmap[0] = res->bitmap[1] = 0;
res->status = htonl(NFS4ERR_BADHANDLE);
- clp = nfs4_find_client(&args->addr->sin_addr);
+ clp = nfs_find_client(args->addr, 4);
if (clp == NULL)
goto out;
inode = nfs_delegation_find_inode(clp, &args->fh);
up_read(&nfsi->rwsem);
iput(inode);
out_putclient:
- nfs4_put_client(clp);
+ nfs_put_client(clp);
out:
dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status));
return res->status;
unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
{
- struct nfs4_client *clp;
+ struct nfs_client *clp;
struct inode *inode;
unsigned res;
res = htonl(NFS4ERR_BADHANDLE);
- clp = nfs4_find_client(&args->addr->sin_addr);
+ clp = nfs_find_client(args->addr, 4);
if (clp == NULL)
goto out;
inode = nfs_delegation_find_inode(clp, &args->fh);
}
iput(inode);
out_putclient:
- nfs4_put_client(clp);
+ nfs_put_client(clp);
out:
dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res));
return res;
--- /dev/null
+/* client.c: NFS client sharing and management code
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/stats.h>
+#include <linux/sunrpc/metrics.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_mount.h>
+#include <linux/nfs4_mount.h>
+#include <linux/lockd/bind.h>
+#include <linux/smp_lock.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
+#include <linux/nfs_idmap.h>
+#include <linux/vfs.h>
+#include <linux/inet.h>
+#include <linux/nfs_xdr.h>
+
+#include <asm/system.h>
+
+#include "nfs4_fs.h"
+#include "callback.h"
+#include "delegation.h"
+#include "iostat.h"
+#include "internal.h"
+
+#define NFSDBG_FACILITY NFSDBG_CLIENT
+
+static DEFINE_SPINLOCK(nfs_client_lock);
+static LIST_HEAD(nfs_client_list);
+static LIST_HEAD(nfs_volume_list);
+static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
+
+/*
+ * RPC cruft for NFS
+ */
+static struct rpc_version *nfs_version[5] = {
+ [2] = &nfs_version2,
+#ifdef CONFIG_NFS_V3
+ [3] = &nfs_version3,
+#endif
+#ifdef CONFIG_NFS_V4
+ [4] = &nfs_version4,
+#endif
+};
+
+struct rpc_program nfs_program = {
+ .name = "nfs",
+ .number = NFS_PROGRAM,
+ .nrvers = ARRAY_SIZE(nfs_version),
+ .version = nfs_version,
+ .stats = &nfs_rpcstat,
+ .pipe_dir_name = "/nfs",
+};
+
+struct rpc_stat nfs_rpcstat = {
+ .program = &nfs_program
+};
+
+
+#ifdef CONFIG_NFS_V3_ACL
+static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
+static struct rpc_version * nfsacl_version[] = {
+ [3] = &nfsacl_version3,
+};
+
+struct rpc_program nfsacl_program = {
+ .name = "nfsacl",
+ .number = NFS_ACL_PROGRAM,
+ .nrvers = ARRAY_SIZE(nfsacl_version),
+ .version = nfsacl_version,
+ .stats = &nfsacl_rpcstat,
+};
+#endif /* CONFIG_NFS_V3_ACL */
+
+/*
+ * Allocate a shared client record
+ *
+ * Since these are allocated/deallocated very rarely, we don't
+ * bother putting them in a slab cache...
+ */
+static struct nfs_client *nfs_alloc_client(const char *hostname,
+ const struct sockaddr_in *addr,
+ int nfsversion)
+{
+ struct nfs_client *clp;
+ int error;
+
+ if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
+ goto error_0;
+
+ error = rpciod_up();
+ if (error < 0) {
+ dprintk("%s: couldn't start rpciod! Error = %d\n",
+ __FUNCTION__, error);
+ goto error_1;
+ }
+ __set_bit(NFS_CS_RPCIOD, &clp->cl_res_state);
+
+ if (nfsversion == 4) {
+ if (nfs_callback_up() < 0)
+ goto error_2;
+ __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
+ }
+
+ atomic_set(&clp->cl_count, 1);
+ clp->cl_cons_state = NFS_CS_INITING;
+
+ clp->cl_nfsversion = nfsversion;
+ memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr));
+
+ if (hostname) {
+ clp->cl_hostname = kstrdup(hostname, GFP_KERNEL);
+ if (!clp->cl_hostname)
+ goto error_3;
+ }
+
+ INIT_LIST_HEAD(&clp->cl_superblocks);
+ clp->cl_rpcclient = ERR_PTR(-EINVAL);
+
+#ifdef CONFIG_NFS_V4
+ init_rwsem(&clp->cl_sem);
+ INIT_LIST_HEAD(&clp->cl_delegations);
+ INIT_LIST_HEAD(&clp->cl_state_owners);
+ INIT_LIST_HEAD(&clp->cl_unused);
+ spin_lock_init(&clp->cl_lock);
+ INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp);
+ rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
+ clp->cl_boot_time = CURRENT_TIME;
+ clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
+#endif
+
+ return clp;
+
+error_3:
+ if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
+ nfs_callback_down();
+error_2:
+ rpciod_down();
+ __clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state);
+error_1:
+ kfree(clp);
+error_0:
+ return NULL;
+}
+
+static void nfs4_shutdown_client(struct nfs_client *clp)
+{
+#ifdef CONFIG_NFS_V4
+ if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
+ nfs4_kill_renewd(clp);
+ while (!list_empty(&clp->cl_unused)) {
+ struct nfs4_state_owner *sp;
+
+ sp = list_entry(clp->cl_unused.next,
+ struct nfs4_state_owner,
+ so_list);
+ list_del(&sp->so_list);
+ kfree(sp);
+ }
+ BUG_ON(!list_empty(&clp->cl_state_owners));
+ if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
+ nfs_idmap_delete(clp);
+#endif
+}
+
+/*
+ * Destroy a shared client record
+ */
+static void nfs_free_client(struct nfs_client *clp)
+{
+ dprintk("--> nfs_free_client(%d)\n", clp->cl_nfsversion);
+
+ nfs4_shutdown_client(clp);
+
+ /* -EIO all pending I/O */
+ if (!IS_ERR(clp->cl_rpcclient))
+ rpc_shutdown_client(clp->cl_rpcclient);
+
+ if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
+ nfs_callback_down();
+
+ if (__test_and_clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state))
+ rpciod_down();
+
+ kfree(clp->cl_hostname);
+ kfree(clp);
+
+ dprintk("<-- nfs_free_client()\n");
+}
+
+/*
+ * Release a reference to a shared client record
+ */
+void nfs_put_client(struct nfs_client *clp)
+{
+ if (!clp)
+ return;
+
+ dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
+
+ if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) {
+ list_del(&clp->cl_share_link);
+ spin_unlock(&nfs_client_lock);
+
+ BUG_ON(!list_empty(&clp->cl_superblocks));
+
+ nfs_free_client(clp);
+ }
+}
+
+/*
+ * Find a client by address
+ * - caller must hold nfs_client_lock
+ */
+static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion)
+{
+ struct nfs_client *clp;
+
+ list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
+ /* Different NFS versions cannot share the same nfs_client */
+ if (clp->cl_nfsversion != nfsversion)
+ continue;
+
+ if (memcmp(&clp->cl_addr.sin_addr, &addr->sin_addr,
+ sizeof(clp->cl_addr.sin_addr)) != 0)
+ continue;
+
+ if (clp->cl_addr.sin_port == addr->sin_port)
+ goto found;
+ }
+
+ return NULL;
+
+found:
+ atomic_inc(&clp->cl_count);
+ return clp;
+}
+
+/*
+ * Find a client by IP address and protocol version
+ * - returns NULL if no such client
+ */
+struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion)
+{
+ struct nfs_client *clp;
+
+ spin_lock(&nfs_client_lock);
+ clp = __nfs_find_client(addr, nfsversion);
+ spin_unlock(&nfs_client_lock);
+
+ BUG_ON(clp && clp->cl_cons_state == 0);
+
+ return clp;
+}
+
+/*
+ * Look up a client by IP address and protocol version
+ * - creates a new record if one doesn't yet exist
+ */
+static struct nfs_client *nfs_get_client(const char *hostname,
+ const struct sockaddr_in *addr,
+ int nfsversion)
+{
+ struct nfs_client *clp, *new = NULL;
+ int error;
+
+ dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%d)\n",
+ hostname ?: "", NIPQUAD(addr->sin_addr),
+ addr->sin_port, nfsversion);
+
+ /* see if the client already exists */
+ do {
+ spin_lock(&nfs_client_lock);
+
+ clp = __nfs_find_client(addr, nfsversion);
+ if (clp)
+ goto found_client;
+ if (new)
+ goto install_client;
+
+ spin_unlock(&nfs_client_lock);
+
+ new = nfs_alloc_client(hostname, addr, nfsversion);
+ } while (new);
+
+ return ERR_PTR(-ENOMEM);
+
+ /* install a new client and return with it unready */
+install_client:
+ clp = new;
+ list_add(&clp->cl_share_link, &nfs_client_list);
+ spin_unlock(&nfs_client_lock);
+ dprintk("--> nfs_get_client() = %p [new]\n", clp);
+ return clp;
+
+ /* found an existing client
+ * - make sure it's ready before returning
+ */
+found_client:
+ spin_unlock(&nfs_client_lock);
+
+ if (new)
+ nfs_free_client(new);
+
+ if (clp->cl_cons_state == NFS_CS_INITING) {
+ DECLARE_WAITQUEUE(myself, current);
+
+ add_wait_queue(&nfs_client_active_wq, &myself);
+
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (signal_pending(current) ||
+ clp->cl_cons_state > NFS_CS_READY)
+ break;
+ schedule();
+ }
+
+ remove_wait_queue(&nfs_client_active_wq, &myself);
+
+ if (signal_pending(current)) {
+ nfs_put_client(clp);
+ return ERR_PTR(-ERESTARTSYS);
+ }
+ }
+
+ if (clp->cl_cons_state < NFS_CS_READY) {
+ error = clp->cl_cons_state;
+ nfs_put_client(clp);
+ return ERR_PTR(error);
+ }
+
+ BUG_ON(clp->cl_cons_state != NFS_CS_READY);
+
+ dprintk("--> nfs_get_client() = %p [share]\n", clp);
+ return clp;
+}
+
+/*
+ * Mark a server as ready or failed
+ */
+static void nfs_mark_client_ready(struct nfs_client *clp, int state)
+{
+ clp->cl_cons_state = state;
+ wake_up_all(&nfs_client_active_wq);
+}
+
+/*
+ * Initialise the timeout values for a connection
+ */
+static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
+ unsigned int timeo, unsigned int retrans)
+{
+ to->to_initval = timeo * HZ / 10;
+ to->to_retries = retrans;
+ if (!to->to_retries)
+ to->to_retries = 2;
+
+ switch (proto) {
+ case IPPROTO_TCP:
+ if (!to->to_initval)
+ to->to_initval = 60 * HZ;
+ if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
+ to->to_initval = NFS_MAX_TCP_TIMEOUT;
+ to->to_increment = to->to_initval;
+ to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
+ to->to_exponential = 0;
+ break;
+ case IPPROTO_UDP:
+ default:
+ if (!to->to_initval)
+ to->to_initval = 11 * HZ / 10;
+ if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
+ to->to_initval = NFS_MAX_UDP_TIMEOUT;
+ to->to_maxval = NFS_MAX_UDP_TIMEOUT;
+ to->to_exponential = 1;
+ break;
+ }
+}
+
+/*
+ * Create an RPC client handle
+ */
+static int nfs_create_rpc_client(struct nfs_client *clp, int proto,
+ unsigned int timeo,
+ unsigned int retrans,
+ rpc_authflavor_t flavor)
+{
+ struct rpc_timeout timeparms;
+ struct rpc_clnt *clnt = NULL;
+ struct rpc_create_args args = {
+ .protocol = proto,
+ .address = (struct sockaddr *)&clp->cl_addr,
+ .addrsize = sizeof(clp->cl_addr),
+ .timeout = &timeparms,
+ .servername = clp->cl_hostname,
+ .program = &nfs_program,
+ .version = clp->rpc_ops->version,
+ .authflavor = flavor,
+ };
+
+ if (!IS_ERR(clp->cl_rpcclient))
+ return 0;
+
+ nfs_init_timeout_values(&timeparms, proto, timeo, retrans);
+ clp->retrans_timeo = timeparms.to_initval;
+ clp->retrans_count = timeparms.to_retries;
+
+ clnt = rpc_create(&args);
+ if (IS_ERR(clnt)) {
+ dprintk("%s: cannot create RPC client. Error = %ld\n",
+ __FUNCTION__, PTR_ERR(clnt));
+ return PTR_ERR(clnt);
+ }
+
+ clp->cl_rpcclient = clnt;
+ return 0;
+}
+
+/*
+ * Version 2 or 3 client destruction
+ */
+static void nfs_destroy_server(struct nfs_server *server)
+{
+ if (!IS_ERR(server->client_acl))
+ rpc_shutdown_client(server->client_acl);
+
+ if (!(server->flags & NFS_MOUNT_NONLM))
+ lockd_down(); /* release rpc.lockd */
+}
+
+/*
+ * Version 2 or 3 lockd setup
+ */
+static int nfs_start_lockd(struct nfs_server *server)
+{
+ int error = 0;
+
+ if (server->nfs_client->cl_nfsversion > 3)
+ goto out;
+ if (server->flags & NFS_MOUNT_NONLM)
+ goto out;
+ error = lockd_up();
+ if (error < 0)
+ server->flags |= NFS_MOUNT_NONLM;
+ else
+ server->destroy = nfs_destroy_server;
+out:
+ return error;
+}
+
+/*
+ * Initialise an NFSv3 ACL client connection
+ */
+#ifdef CONFIG_NFS_V3_ACL
+static void nfs_init_server_aclclient(struct nfs_server *server)
+{
+ if (server->nfs_client->cl_nfsversion != 3)
+ goto out_noacl;
+ if (server->flags & NFS_MOUNT_NOACL)
+ goto out_noacl;
+
+ server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
+ if (IS_ERR(server->client_acl))
+ goto out_noacl;
+
+ /* No errors! Assume that Sun nfsacls are supported */
+ server->caps |= NFS_CAP_ACLS;
+ return;
+
+out_noacl:
+ server->caps &= ~NFS_CAP_ACLS;
+}
+#else
+static inline void nfs_init_server_aclclient(struct nfs_server *server)
+{
+ server->flags &= ~NFS_MOUNT_NOACL;
+ server->caps &= ~NFS_CAP_ACLS;
+}
+#endif
+
+/*
+ * Create a general RPC client
+ */
+static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour)
+{
+ struct nfs_client *clp = server->nfs_client;
+
+ server->client = rpc_clone_client(clp->cl_rpcclient);
+ if (IS_ERR(server->client)) {
+ dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__);
+ return PTR_ERR(server->client);
+ }
+
+ if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
+ struct rpc_auth *auth;
+
+ auth = rpcauth_create(pseudoflavour, server->client);
+ if (IS_ERR(auth)) {
+ dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
+ return PTR_ERR(auth);
+ }
+ }
+ server->client->cl_softrtry = 0;
+ if (server->flags & NFS_MOUNT_SOFT)
+ server->client->cl_softrtry = 1;
+
+ server->client->cl_intr = 0;
+ if (server->flags & NFS4_MOUNT_INTR)
+ server->client->cl_intr = 1;
+
+ return 0;
+}
+
+/*
+ * Initialise an NFS2 or NFS3 client
+ */
+static int nfs_init_client(struct nfs_client *clp, const struct nfs_mount_data *data)
+{
+ int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
+ int error;
+
+ if (clp->cl_cons_state == NFS_CS_READY) {
+ /* the client is already initialised */
+ dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
+ return 0;
+ }
+
+ /* Check NFS protocol revision and initialize RPC op vector */
+ clp->rpc_ops = &nfs_v2_clientops;
+#ifdef CONFIG_NFS_V3
+ if (clp->cl_nfsversion == 3)
+ clp->rpc_ops = &nfs_v3_clientops;
+#endif
+ /*
+ * Create a client RPC handle for doing FSSTAT with UNIX auth only
+ * - RFC 2623, sec 2.3.2
+ */
+ error = nfs_create_rpc_client(clp, proto, data->timeo, data->retrans,
+ RPC_AUTH_UNIX);
+ if (error < 0)
+ goto error;
+ nfs_mark_client_ready(clp, NFS_CS_READY);
+ return 0;
+
+error:
+ nfs_mark_client_ready(clp, error);
+ dprintk("<-- nfs_init_client() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * Create a version 2 or 3 client
+ */
+static int nfs_init_server(struct nfs_server *server, const struct nfs_mount_data *data)
+{
+ struct nfs_client *clp;
+ int error, nfsvers = 2;
+
+ dprintk("--> nfs_init_server()\n");
+
+#ifdef CONFIG_NFS_V3
+ if (data->flags & NFS_MOUNT_VER3)
+ nfsvers = 3;
+#endif
+
+ /* Allocate or find a client reference we can use */
+ clp = nfs_get_client(data->hostname, &data->addr, nfsvers);
+ if (IS_ERR(clp)) {
+ dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
+ return PTR_ERR(clp);
+ }
+
+ error = nfs_init_client(clp, data);
+ if (error < 0)
+ goto error;
+
+ server->nfs_client = clp;
+
+ /* Initialise the client representation from the mount data */
+ server->flags = data->flags & NFS_MOUNT_FLAGMASK;
+
+ if (data->rsize)
+ server->rsize = nfs_block_size(data->rsize, NULL);
+ if (data->wsize)
+ server->wsize = nfs_block_size(data->wsize, NULL);
+
+ server->acregmin = data->acregmin * HZ;
+ server->acregmax = data->acregmax * HZ;
+ server->acdirmin = data->acdirmin * HZ;
+ server->acdirmax = data->acdirmax * HZ;
+
+ /* Start lockd here, before we might error out */
+ error = nfs_start_lockd(server);
+ if (error < 0)
+ goto error;
+
+ error = nfs_init_server_rpcclient(server, data->pseudoflavor);
+ if (error < 0)
+ goto error;
+
+ server->namelen = data->namlen;
+ /* Create a client RPC handle for the NFSv3 ACL management interface */
+ nfs_init_server_aclclient(server);
+ if (clp->cl_nfsversion == 3) {
+ if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
+ server->namelen = NFS3_MAXNAMLEN;
+ server->caps |= NFS_CAP_READDIRPLUS;
+ } else {
+ if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
+ server->namelen = NFS2_MAXNAMLEN;
+ }
+
+ dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
+ return 0;
+
+error:
+ server->nfs_client = NULL;
+ nfs_put_client(clp);
+ dprintk("<-- nfs_init_server() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * Load up the server record from information gained in an fsinfo record
+ */
+static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo)
+{
+ unsigned long max_rpc_payload;
+
+ /* Work out a lot of parameters */
+ if (server->rsize == 0)
+ server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
+ if (server->wsize == 0)
+ server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
+
+ if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
+ server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
+ if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
+ server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
+
+ max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
+ if (server->rsize > max_rpc_payload)
+ server->rsize = max_rpc_payload;
+ if (server->rsize > NFS_MAX_FILE_IO_SIZE)
+ server->rsize = NFS_MAX_FILE_IO_SIZE;
+ server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
+
+ if (server->wsize > max_rpc_payload)
+ server->wsize = max_rpc_payload;
+ if (server->wsize > NFS_MAX_FILE_IO_SIZE)
+ server->wsize = NFS_MAX_FILE_IO_SIZE;
+ server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
+
+ server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
+ if (server->dtsize > PAGE_CACHE_SIZE)
+ server->dtsize = PAGE_CACHE_SIZE;
+ if (server->dtsize > server->rsize)
+ server->dtsize = server->rsize;
+
+ if (server->flags & NFS_MOUNT_NOAC) {
+ server->acregmin = server->acregmax = 0;
+ server->acdirmin = server->acdirmax = 0;
+ }
+
+ server->maxfilesize = fsinfo->maxfilesize;
+
+ /* We're airborne Set socket buffersize */
+ rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
+}
+
+/*
+ * Probe filesystem information, including the FSID on v2/v3
+ */
+static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
+{
+ struct nfs_fsinfo fsinfo;
+ struct nfs_client *clp = server->nfs_client;
+ int error;
+
+ dprintk("--> nfs_probe_fsinfo()\n");
+
+ if (clp->rpc_ops->set_capabilities != NULL) {
+ error = clp->rpc_ops->set_capabilities(server, mntfh);
+ if (error < 0)
+ goto out_error;
+ }
+
+ fsinfo.fattr = fattr;
+ nfs_fattr_init(fattr);
+ error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
+ if (error < 0)
+ goto out_error;
+
+ nfs_server_set_fsinfo(server, &fsinfo);
+
+ /* Get some general file system info */
+ if (server->namelen == 0) {
+ struct nfs_pathconf pathinfo;
+
+ pathinfo.fattr = fattr;
+ nfs_fattr_init(fattr);
+
+ if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
+ server->namelen = pathinfo.max_namelen;
+ }
+
+ dprintk("<-- nfs_probe_fsinfo() = 0\n");
+ return 0;
+
+out_error:
+ dprintk("nfs_probe_fsinfo: error = %d\n", -error);
+ return error;
+}
+
+/*
+ * Copy useful information when duplicating a server record
+ */
+static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
+{
+ target->flags = source->flags;
+ target->acregmin = source->acregmin;
+ target->acregmax = source->acregmax;
+ target->acdirmin = source->acdirmin;
+ target->acdirmax = source->acdirmax;
+ target->caps = source->caps;
+}
+
+/*
+ * Allocate and initialise a server record
+ */
+static struct nfs_server *nfs_alloc_server(void)
+{
+ struct nfs_server *server;
+
+ server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
+ if (!server)
+ return NULL;
+
+ server->client = server->client_acl = ERR_PTR(-EINVAL);
+
+ /* Zero out the NFS state stuff */
+ INIT_LIST_HEAD(&server->client_link);
+ INIT_LIST_HEAD(&server->master_link);
+
+ server->io_stats = nfs_alloc_iostats();
+ if (!server->io_stats) {
+ kfree(server);
+ return NULL;
+ }
+
+ return server;
+}
+
+/*
+ * Free up a server record
+ */
+void nfs_free_server(struct nfs_server *server)
+{
+ dprintk("--> nfs_free_server()\n");
+
+ spin_lock(&nfs_client_lock);
+ list_del(&server->client_link);
+ list_del(&server->master_link);
+ spin_unlock(&nfs_client_lock);
+
+ if (server->destroy != NULL)
+ server->destroy(server);
+ if (!IS_ERR(server->client))
+ rpc_shutdown_client(server->client);
+
+ nfs_put_client(server->nfs_client);
+
+ nfs_free_iostats(server->io_stats);
+ kfree(server);
+ nfs_release_automount_timer();
+ dprintk("<-- nfs_free_server()\n");
+}
+
+/*
+ * Create a version 2 or 3 volume record
+ * - keyed on server and FSID
+ */
+struct nfs_server *nfs_create_server(const struct nfs_mount_data *data,
+ struct nfs_fh *mntfh)
+{
+ struct nfs_server *server;
+ struct nfs_fattr fattr;
+ int error;
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ /* Get a client representation */
+ error = nfs_init_server(server, data);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ /* Probe the root fh to retrieve its FSID */
+ error = nfs_probe_fsinfo(server, mntfh, &fattr);
+ if (error < 0)
+ goto error;
+ if (!(fattr.valid & NFS_ATTR_FATTR)) {
+ error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr);
+ if (error < 0) {
+ dprintk("nfs_create_server: getattr error = %d\n", -error);
+ goto error;
+ }
+ }
+ memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid));
+
+ dprintk("Server FSID: %llx:%llx\n",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ spin_lock(&nfs_client_lock);
+ list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
+ list_add_tail(&server->master_link, &nfs_volume_list);
+ spin_unlock(&nfs_client_lock);
+
+ server->mount_time = jiffies;
+ return server;
+
+error:
+ nfs_free_server(server);
+ return ERR_PTR(error);
+}
+
+#ifdef CONFIG_NFS_V4
+/*
+ * Initialise an NFS4 client record
+ */
+static int nfs4_init_client(struct nfs_client *clp,
+ int proto, int timeo, int retrans,
+ rpc_authflavor_t authflavour)
+{
+ int error;
+
+ if (clp->cl_cons_state == NFS_CS_READY) {
+ /* the client is initialised already */
+ dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
+ return 0;
+ }
+
+ /* Check NFS protocol revision and initialize RPC op vector */
+ clp->rpc_ops = &nfs_v4_clientops;
+
+ error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour);
+ if (error < 0)
+ goto error;
+
+ error = nfs_idmap_new(clp);
+ if (error < 0) {
+ dprintk("%s: failed to create idmapper. Error = %d\n",
+ __FUNCTION__, error);
+ goto error;
+ }
+ __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
+
+ nfs_mark_client_ready(clp, NFS_CS_READY);
+ return 0;
+
+error:
+ nfs_mark_client_ready(clp, error);
+ dprintk("<-- nfs4_init_client() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * Set up an NFS4 client
+ */
+static int nfs4_set_client(struct nfs_server *server,
+ const char *hostname, const struct sockaddr_in *addr,
+ rpc_authflavor_t authflavour,
+ int proto, int timeo, int retrans)
+{
+ struct nfs_client *clp;
+ int error;
+
+ dprintk("--> nfs4_set_client()\n");
+
+ /* Allocate or find a client reference we can use */
+ clp = nfs_get_client(hostname, addr, 4);
+ if (IS_ERR(clp)) {
+ error = PTR_ERR(clp);
+ goto error;
+ }
+ error = nfs4_init_client(clp, proto, timeo, retrans, authflavour);
+ if (error < 0)
+ goto error_put;
+
+ server->nfs_client = clp;
+ dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
+ return 0;
+
+error_put:
+ nfs_put_client(clp);
+error:
+ dprintk("<-- nfs4_set_client() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * Create a version 4 volume record
+ */
+static int nfs4_init_server(struct nfs_server *server,
+ const struct nfs4_mount_data *data, rpc_authflavor_t authflavour)
+{
+ int error;
+
+ dprintk("--> nfs4_init_server()\n");
+
+ /* Initialise the client representation from the mount data */
+ server->flags = data->flags & NFS_MOUNT_FLAGMASK;
+ server->caps |= NFS_CAP_ATOMIC_OPEN;
+
+ if (data->rsize)
+ server->rsize = nfs_block_size(data->rsize, NULL);
+ if (data->wsize)
+ server->wsize = nfs_block_size(data->wsize, NULL);
+
+ server->acregmin = data->acregmin * HZ;
+ server->acregmax = data->acregmax * HZ;
+ server->acdirmin = data->acdirmin * HZ;
+ server->acdirmax = data->acdirmax * HZ;
+
+ error = nfs_init_server_rpcclient(server, authflavour);
+
+ /* Done */
+ dprintk("<-- nfs4_init_server() = %d\n", error);
+ return error;
+}
+
+/*
+ * Create a version 4 volume record
+ * - keyed on server and FSID
+ */
+struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *data,
+ const char *hostname,
+ const struct sockaddr_in *addr,
+ const char *mntpath,
+ const char *ip_addr,
+ rpc_authflavor_t authflavour,
+ struct nfs_fh *mntfh)
+{
+ struct nfs_fattr fattr;
+ struct nfs_server *server;
+ int error;
+
+ dprintk("--> nfs4_create_server()\n");
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ /* Get a client record */
+ error = nfs4_set_client(server, hostname, addr, authflavour,
+ data->proto, data->timeo, data->retrans);
+ if (error < 0)
+ goto error;
+
+ /* set up the general RPC client */
+ error = nfs4_init_server(server, data, authflavour);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ /* Probe the root fh to retrieve its FSID */
+ error = nfs4_path_walk(server, mntfh, mntpath);
+ if (error < 0)
+ goto error;
+
+ dprintk("Server FSID: %llx:%llx\n",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+ dprintk("Mount FH: %d\n", mntfh->size);
+
+ error = nfs_probe_fsinfo(server, mntfh, &fattr);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ spin_lock(&nfs_client_lock);
+ list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
+ list_add_tail(&server->master_link, &nfs_volume_list);
+ spin_unlock(&nfs_client_lock);
+
+ server->mount_time = jiffies;
+ dprintk("<-- nfs4_create_server() = %p\n", server);
+ return server;
+
+error:
+ nfs_free_server(server);
+ dprintk("<-- nfs4_create_server() = error %d\n", error);
+ return ERR_PTR(error);
+}
+
+/*
+ * Create an NFS4 referral server record
+ */
+struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
+ struct nfs_fh *fh)
+{
+ struct nfs_client *parent_client;
+ struct nfs_server *server, *parent_server;
+ struct nfs_fattr fattr;
+ int error;
+
+ dprintk("--> nfs4_create_referral_server()\n");
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ parent_server = NFS_SB(data->sb);
+ parent_client = parent_server->nfs_client;
+
+ /* Get a client representation.
+ * Note: NFSv4 always uses TCP, */
+ error = nfs4_set_client(server, data->hostname, data->addr,
+ data->authflavor,
+ parent_server->client->cl_xprt->prot,
+ parent_client->retrans_timeo,
+ parent_client->retrans_count);
+ if (error < 0)
+ goto error;
+
+ /* Initialise the client representation from the parent server */
+ nfs_server_copy_userdata(server, parent_server);
+ server->caps |= NFS_CAP_ATOMIC_OPEN;
+
+ error = nfs_init_server_rpcclient(server, data->authflavor);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ /* probe the filesystem info for this server filesystem */
+ error = nfs_probe_fsinfo(server, fh, &fattr);
+ if (error < 0)
+ goto error;
+
+ dprintk("Referral FSID: %llx:%llx\n",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+
+ spin_lock(&nfs_client_lock);
+ list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
+ list_add_tail(&server->master_link, &nfs_volume_list);
+ spin_unlock(&nfs_client_lock);
+
+ server->mount_time = jiffies;
+
+ dprintk("<-- nfs_create_referral_server() = %p\n", server);
+ return server;
+
+error:
+ nfs_free_server(server);
+ dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
+ return ERR_PTR(error);
+}
+
+#endif /* CONFIG_NFS_V4 */
+
+/*
+ * Clone an NFS2, NFS3 or NFS4 server record
+ */
+struct nfs_server *nfs_clone_server(struct nfs_server *source,
+ struct nfs_fh *fh,
+ struct nfs_fattr *fattr)
+{
+ struct nfs_server *server;
+ struct nfs_fattr fattr_fsinfo;
+ int error;
+
+ dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
+ (unsigned long long) fattr->fsid.major,
+ (unsigned long long) fattr->fsid.minor);
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ /* Copy data from the source */
+ server->nfs_client = source->nfs_client;
+ atomic_inc(&server->nfs_client->cl_count);
+ nfs_server_copy_userdata(server, source);
+
+ server->fsid = fattr->fsid;
+
+ error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor);
+ if (error < 0)
+ goto out_free_server;
+ if (!IS_ERR(source->client_acl))
+ nfs_init_server_aclclient(server);
+
+ /* probe the filesystem info for this server filesystem */
+ error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo);
+ if (error < 0)
+ goto out_free_server;
+
+ dprintk("Cloned FSID: %llx:%llx\n",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+
+ error = nfs_start_lockd(server);
+ if (error < 0)
+ goto out_free_server;
+
+ spin_lock(&nfs_client_lock);
+ list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
+ list_add_tail(&server->master_link, &nfs_volume_list);
+ spin_unlock(&nfs_client_lock);
+
+ server->mount_time = jiffies;
+
+ dprintk("<-- nfs_clone_server() = %p\n", server);
+ return server;
+
+out_free_server:
+ nfs_free_server(server);
+ dprintk("<-- nfs_clone_server() = error %d\n", error);
+ return ERR_PTR(error);
+}
+
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry *proc_fs_nfs;
+
+static int nfs_server_list_open(struct inode *inode, struct file *file);
+static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
+static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
+static void nfs_server_list_stop(struct seq_file *p, void *v);
+static int nfs_server_list_show(struct seq_file *m, void *v);
+
+static struct seq_operations nfs_server_list_ops = {
+ .start = nfs_server_list_start,
+ .next = nfs_server_list_next,
+ .stop = nfs_server_list_stop,
+ .show = nfs_server_list_show,
+};
+
+static struct file_operations nfs_server_list_fops = {
+ .open = nfs_server_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int nfs_volume_list_open(struct inode *inode, struct file *file);
+static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
+static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
+static void nfs_volume_list_stop(struct seq_file *p, void *v);
+static int nfs_volume_list_show(struct seq_file *m, void *v);
+
+static struct seq_operations nfs_volume_list_ops = {
+ .start = nfs_volume_list_start,
+ .next = nfs_volume_list_next,
+ .stop = nfs_volume_list_stop,
+ .show = nfs_volume_list_show,
+};
+
+static struct file_operations nfs_volume_list_fops = {
+ .open = nfs_volume_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
+ * we're dealing
+ */
+static int nfs_server_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *m;
+ int ret;
+
+ ret = seq_open(file, &nfs_server_list_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = PDE(inode)->data;
+
+ return 0;
+}
+
+/*
+ * set up the iterator to start reading from the server list and return the first item
+ */
+static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct list_head *_p;
+ loff_t pos = *_pos;
+
+ /* lock the list against modification */
+ spin_lock(&nfs_client_lock);
+
+ /* allow for the header line */
+ if (!pos)
+ return SEQ_START_TOKEN;
+ pos--;
+
+ /* find the n'th element in the list */
+ list_for_each(_p, &nfs_client_list)
+ if (!pos--)
+ break;
+
+ return _p != &nfs_client_list ? _p : NULL;
+}
+
+/*
+ * move to next server
+ */
+static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct list_head *_p;
+
+ (*pos)++;
+
+ _p = v;
+ _p = (v == SEQ_START_TOKEN) ? nfs_client_list.next : _p->next;
+
+ return _p != &nfs_client_list ? _p : NULL;
+}
+
+/*
+ * clean up after reading from the transports list
+ */
+static void nfs_server_list_stop(struct seq_file *p, void *v)
+{
+ spin_unlock(&nfs_client_lock);
+}
+
+/*
+ * display a header line followed by a load of call lines
+ */
+static int nfs_server_list_show(struct seq_file *m, void *v)
+{
+ struct nfs_client *clp;
+
+ /* display header on line 1 */
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
+ return 0;
+ }
+
+ /* display one transport per line on subsequent lines */
+ clp = list_entry(v, struct nfs_client, cl_share_link);
+
+ seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s\n",
+ clp->cl_nfsversion,
+ NIPQUAD(clp->cl_addr.sin_addr),
+ ntohs(clp->cl_addr.sin_port),
+ atomic_read(&clp->cl_count),
+ clp->cl_hostname);
+
+ return 0;
+}
+
+/*
+ * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
+ */
+static int nfs_volume_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *m;
+ int ret;
+
+ ret = seq_open(file, &nfs_volume_list_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = PDE(inode)->data;
+
+ return 0;
+}
+
+/*
+ * set up the iterator to start reading from the volume list and return the first item
+ */
+static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct list_head *_p;
+ loff_t pos = *_pos;
+
+ /* lock the list against modification */
+ spin_lock(&nfs_client_lock);
+
+ /* allow for the header line */
+ if (!pos)
+ return SEQ_START_TOKEN;
+ pos--;
+
+ /* find the n'th element in the list */
+ list_for_each(_p, &nfs_volume_list)
+ if (!pos--)
+ break;
+
+ return _p != &nfs_volume_list ? _p : NULL;
+}
+
+/*
+ * move to next volume
+ */
+static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct list_head *_p;
+
+ (*pos)++;
+
+ _p = v;
+ _p = (v == SEQ_START_TOKEN) ? nfs_volume_list.next : _p->next;
+
+ return _p != &nfs_volume_list ? _p : NULL;
+}
+
+/*
+ * clean up after reading from the transports list
+ */
+static void nfs_volume_list_stop(struct seq_file *p, void *v)
+{
+ spin_unlock(&nfs_client_lock);
+}
+
+/*
+ * display a header line followed by a load of call lines
+ */
+static int nfs_volume_list_show(struct seq_file *m, void *v)
+{
+ struct nfs_server *server;
+ struct nfs_client *clp;
+ char dev[8], fsid[17];
+
+ /* display header on line 1 */
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(m, "NV SERVER PORT DEV FSID\n");
+ return 0;
+ }
+ /* display one transport per line on subsequent lines */
+ server = list_entry(v, struct nfs_server, master_link);
+ clp = server->nfs_client;
+
+ snprintf(dev, 8, "%u:%u",
+ MAJOR(server->s_dev), MINOR(server->s_dev));
+
+ snprintf(fsid, 17, "%llx:%llx",
+ (unsigned long long) server->fsid.major,
+ (unsigned long long) server->fsid.minor);
+
+ seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n",
+ clp->cl_nfsversion,
+ NIPQUAD(clp->cl_addr.sin_addr),
+ ntohs(clp->cl_addr.sin_port),
+ dev,
+ fsid);
+
+ return 0;
+}
+
+/*
+ * initialise the /proc/fs/nfsfs/ directory
+ */
+int __init nfs_fs_proc_init(void)
+{
+ struct proc_dir_entry *p;
+
+ proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs);
+ if (!proc_fs_nfs)
+ goto error_0;
+
+ proc_fs_nfs->owner = THIS_MODULE;
+
+ /* a file of servers with which we're dealing */
+ p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs);
+ if (!p)
+ goto error_1;
+
+ p->proc_fops = &nfs_server_list_fops;
+ p->owner = THIS_MODULE;
+
+ /* a file of volumes that we have mounted */
+ p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs);
+ if (!p)
+ goto error_2;
+
+ p->proc_fops = &nfs_volume_list_fops;
+ p->owner = THIS_MODULE;
+ return 0;
+
+error_2:
+ remove_proc_entry("servers", proc_fs_nfs);
+error_1:
+ remove_proc_entry("nfsfs", proc_root_fs);
+error_0:
+ return -ENOMEM;
+}
+
+/*
+ * clean up the /proc/fs/nfsfs/ directory
+ */
+void nfs_fs_proc_exit(void)
+{
+ remove_proc_entry("volumes", proc_fs_nfs);
+ remove_proc_entry("servers", proc_fs_nfs);
+ remove_proc_entry("nfsfs", proc_root_fs);
+}
+
+#endif /* CONFIG_PROC_FS */
#include "nfs4_fs.h"
#include "delegation.h"
+#include "internal.h"
static struct nfs_delegation *nfs_alloc_delegation(void)
{
case -NFS4ERR_EXPIRED:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
case -NFS4ERR_STALE_CLIENTID:
- nfs4_schedule_state_recovery(NFS_SERVER(inode)->nfs4_state);
+ nfs4_schedule_state_recovery(NFS_SERVER(inode)->nfs_client);
goto out_err;
}
}
*/
int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res)
{
- struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+ struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_delegation *delegation;
int status = 0;
sizeof(delegation->stateid)) != 0 ||
delegation->type != nfsi->delegation->type) {
printk("%s: server %u.%u.%u.%u, handed out a duplicate delegation!\n",
- __FUNCTION__, NIPQUAD(clp->cl_addr));
+ __FUNCTION__, NIPQUAD(clp->cl_addr.sin_addr));
status = -EIO;
}
}
*/
int __nfs_inode_return_delegation(struct inode *inode)
{
- struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+ struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_delegation *delegation;
int res = 0;
*/
void nfs_return_all_delegations(struct super_block *sb)
{
- struct nfs4_client *clp = NFS_SB(sb)->nfs4_state;
+ struct nfs_client *clp = NFS_SB(sb)->nfs_client;
struct nfs_delegation *delegation;
struct inode *inode;
int nfs_do_expire_all_delegations(void *ptr)
{
- struct nfs4_client *clp = ptr;
+ struct nfs_client *clp = ptr;
struct nfs_delegation *delegation;
struct inode *inode;
}
out:
spin_unlock(&clp->cl_lock);
- nfs4_put_client(clp);
+ nfs_put_client(clp);
module_put_and_exit(0);
}
-void nfs_expire_all_delegations(struct nfs4_client *clp)
+void nfs_expire_all_delegations(struct nfs_client *clp)
{
struct task_struct *task;
atomic_inc(&clp->cl_count);
task = kthread_run(nfs_do_expire_all_delegations, clp,
"%u.%u.%u.%u-delegreturn",
- NIPQUAD(clp->cl_addr));
+ NIPQUAD(clp->cl_addr.sin_addr));
if (!IS_ERR(task))
return;
- nfs4_put_client(clp);
+ nfs_put_client(clp);
module_put(THIS_MODULE);
}
/*
* Return all delegations following an NFS4ERR_CB_PATH_DOWN error.
*/
-void nfs_handle_cb_pathdown(struct nfs4_client *clp)
+void nfs_handle_cb_pathdown(struct nfs_client *clp)
{
struct nfs_delegation *delegation;
struct inode *inode;
struct recall_threadargs {
struct inode *inode;
- struct nfs4_client *clp;
+ struct nfs_client *clp;
const nfs4_stateid *stateid;
struct completion started;
{
struct recall_threadargs *args = (struct recall_threadargs *)data;
struct inode *inode = igrab(args->inode);
- struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+ struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_delegation *delegation;
/*
* Retrieve the inode associated with a delegation
*/
-struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle)
+struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle)
{
struct nfs_delegation *delegation;
struct inode *res = NULL;
/*
* Mark all delegations as needing to be reclaimed
*/
-void nfs_delegation_mark_reclaim(struct nfs4_client *clp)
+void nfs_delegation_mark_reclaim(struct nfs_client *clp)
{
struct nfs_delegation *delegation;
spin_lock(&clp->cl_lock);
/*
* Reap all unclaimed delegations after reboot recovery is done
*/
-void nfs_delegation_reap_unclaimed(struct nfs4_client *clp)
+void nfs_delegation_reap_unclaimed(struct nfs_client *clp)
{
struct nfs_delegation *delegation, *n;
LIST_HEAD(head);
int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode)
{
- struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+ struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_delegation *delegation;
int res = 0;
int __nfs_inode_return_delegation(struct inode *inode);
int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
-struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle);
+struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
void nfs_return_all_delegations(struct super_block *sb);
-void nfs_expire_all_delegations(struct nfs4_client *clp);
-void nfs_handle_cb_pathdown(struct nfs4_client *clp);
+void nfs_expire_all_delegations(struct nfs_client *clp);
+void nfs_handle_cb_pathdown(struct nfs_client *clp);
-void nfs_delegation_mark_reclaim(struct nfs4_client *clp);
-void nfs_delegation_reap_unclaimed(struct nfs4_client *clp);
+void nfs_delegation_mark_reclaim(struct nfs_client *clp);
+void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
/* NFSv4 delegation-related procedures */
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid);
#include <linux/nfs_mount.h>
#include <linux/pagemap.h>
#include <linux/smp_lock.h>
+#include <linux/pagevec.h>
#include <linux/namei.h>
+#include <linux/mount.h>
#include "nfs4_fs.h"
#include "delegation.h"
return (nd->intent.open.flags & O_EXCL) != 0;
}
-static inline int nfs_reval_fsid(struct inode *dir,
- struct nfs_fh *fh, struct nfs_fattr *fattr)
+static inline int nfs_reval_fsid(struct vfsmount *mnt, struct inode *dir,
+ struct nfs_fh *fh, struct nfs_fattr *fattr)
{
struct nfs_server *server = NFS_SERVER(dir);
if (!nfs_fsid_equal(&server->fsid, &fattr->fsid))
/* Revalidate fsid on root dir */
- return __nfs_revalidate_inode(server, dir->i_sb->s_root->d_inode);
+ return __nfs_revalidate_inode(server, mnt->mnt_root->d_inode);
return 0;
}
lock_kernel();
- /* If we're doing an exclusive create, optimize away the lookup */
- if (nfs_is_exclusive_create(dir, nd))
- goto no_entry;
+ /*
+ * If we're doing an exclusive create, optimize away the lookup
+ * but don't hash the dentry.
+ */
+ if (nfs_is_exclusive_create(dir, nd)) {
+ d_instantiate(dentry, NULL);
+ res = NULL;
+ goto out_unlock;
+ }
error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr);
if (error == -ENOENT)
res = ERR_PTR(error);
goto out_unlock;
}
- error = nfs_reval_fsid(dir, &fhandle, &fattr);
+ error = nfs_reval_fsid(nd->mnt, dir, &fhandle, &fattr);
if (error < 0) {
res = ERR_PTR(error);
goto out_unlock;
res = (struct dentry *)inode;
if (IS_ERR(res))
goto out_unlock;
+
no_entry:
- res = d_add_unique(dentry, inode);
+ res = d_materialise_unique(dentry, inode);
if (res != NULL)
dentry = res;
nfs_renew_times(dentry);
dput(dentry);
return NULL;
}
- alias = d_add_unique(dentry, inode);
+
+ alias = d_materialise_unique(dentry, inode);
if (alias != NULL) {
dput(dentry);
dentry = alias;
}
+
nfs_renew_times(dentry);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
return dentry;
struct inode *dir = dentry->d_parent->d_inode;
error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
if (error)
- goto out_err;
+ return error;
}
if (!(fattr->valid & NFS_ATTR_FATTR)) {
struct nfs_server *server = NFS_SB(dentry->d_sb);
- error = server->rpc_ops->getattr(server, fhandle, fattr);
+ error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr);
if (error < 0)
- goto out_err;
+ return error;
}
inode = nfs_fhget(dentry->d_sb, fhandle, fattr);
error = PTR_ERR(inode);
if (IS_ERR(inode))
- goto out_err;
+ return error;
d_instantiate(dentry, inode);
+ if (d_unhashed(dentry))
+ d_rehash(dentry);
return 0;
-out_err:
- d_drop(dentry);
- return error;
}
/*
return error;
}
-static int
-nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
+/*
+ * To create a symbolic link, most file systems instantiate a new inode,
+ * add a page to it containing the path, then write it out to the disk
+ * using prepare_write/commit_write.
+ *
+ * Unfortunately the NFS client can't create the in-core inode first
+ * because it needs a file handle to create an in-core inode (see
+ * fs/nfs/inode.c:nfs_fhget). We only have a file handle *after* the
+ * symlink request has completed on the server.
+ *
+ * So instead we allocate a raw page, copy the symname into it, then do
+ * the SYMLINK request with the page as the buffer. If it succeeds, we
+ * now have a new file handle and can instantiate an in-core NFS inode
+ * and move the raw page into its mapping.
+ */
+static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
+ struct pagevec lru_pvec;
+ struct page *page;
+ char *kaddr;
struct iattr attr;
- struct nfs_fattr sym_attr;
- struct nfs_fh sym_fh;
- struct qstr qsymname;
+ unsigned int pathlen = strlen(symname);
int error;
dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s)\n", dir->i_sb->s_id,
dir->i_ino, dentry->d_name.name, symname);
-#ifdef NFS_PARANOIA
-if (dentry->d_inode)
-printk("nfs_proc_symlink: %s/%s not negative!\n",
-dentry->d_parent->d_name.name, dentry->d_name.name);
-#endif
- /*
- * Fill in the sattr for the call.
- * Note: SunOS 4.1.2 crashes if the mode isn't initialized!
- */
- attr.ia_valid = ATTR_MODE;
- attr.ia_mode = S_IFLNK | S_IRWXUGO;
+ if (pathlen > PAGE_SIZE)
+ return -ENAMETOOLONG;
- qsymname.name = symname;
- qsymname.len = strlen(symname);
+ attr.ia_mode = S_IFLNK | S_IRWXUGO;
+ attr.ia_valid = ATTR_MODE;
lock_kernel();
+
+ page = alloc_page(GFP_KERNEL);
+ if (!page) {
+ unlock_kernel();
+ return -ENOMEM;
+ }
+
+ kaddr = kmap_atomic(page, KM_USER0);
+ memcpy(kaddr, symname, pathlen);
+ if (pathlen < PAGE_SIZE)
+ memset(kaddr + pathlen, 0, PAGE_SIZE - pathlen);
+ kunmap_atomic(kaddr, KM_USER0);
+
nfs_begin_data_update(dir);
- error = NFS_PROTO(dir)->symlink(dir, &dentry->d_name, &qsymname,
- &attr, &sym_fh, &sym_attr);
+ error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr);
nfs_end_data_update(dir);
- if (!error) {
- error = nfs_instantiate(dentry, &sym_fh, &sym_attr);
- } else {
- if (error == -EEXIST)
- printk("nfs_proc_symlink: %s/%s already exists??\n",
- dentry->d_parent->d_name.name, dentry->d_name.name);
+ if (error != 0) {
+ dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s) error %d\n",
+ dir->i_sb->s_id, dir->i_ino,
+ dentry->d_name.name, symname, error);
d_drop(dentry);
+ __free_page(page);
+ unlock_kernel();
+ return error;
}
+
+ /*
+ * No big deal if we can't add this page to the page cache here.
+ * READLINK will get the missing page from the server if needed.
+ */
+ pagevec_init(&lru_pvec, 0);
+ if (!add_to_page_cache(page, dentry->d_inode->i_mapping, 0,
+ GFP_KERNEL)) {
+ if (!pagevec_add(&lru_pvec, page))
+ __pagevec_lru_add(&lru_pvec);
+ SetPageUptodate(page);
+ unlock_page(page);
+ } else
+ __free_page(page);
+
unlock_kernel();
- return error;
+ return 0;
}
static int
return error;
}
+static DEFINE_SPINLOCK(nfs_access_lru_lock);
+static LIST_HEAD(nfs_access_lru_list);
+static atomic_long_t nfs_access_nr_entries;
+
+static void nfs_access_free_entry(struct nfs_access_entry *entry)
+{
+ put_rpccred(entry->cred);
+ kfree(entry);
+ smp_mb__before_atomic_dec();
+ atomic_long_dec(&nfs_access_nr_entries);
+ smp_mb__after_atomic_dec();
+}
+
+int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
+{
+ LIST_HEAD(head);
+ struct nfs_inode *nfsi;
+ struct nfs_access_entry *cache;
+
+ spin_lock(&nfs_access_lru_lock);
+restart:
+ list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) {
+ struct inode *inode;
+
+ if (nr_to_scan-- == 0)
+ break;
+ inode = igrab(&nfsi->vfs_inode);
+ if (inode == NULL)
+ continue;
+ spin_lock(&inode->i_lock);
+ if (list_empty(&nfsi->access_cache_entry_lru))
+ goto remove_lru_entry;
+ cache = list_entry(nfsi->access_cache_entry_lru.next,
+ struct nfs_access_entry, lru);
+ list_move(&cache->lru, &head);
+ rb_erase(&cache->rb_node, &nfsi->access_cache);
+ if (!list_empty(&nfsi->access_cache_entry_lru))
+ list_move_tail(&nfsi->access_cache_inode_lru,
+ &nfs_access_lru_list);
+ else {
+remove_lru_entry:
+ list_del_init(&nfsi->access_cache_inode_lru);
+ clear_bit(NFS_INO_ACL_LRU_SET, &nfsi->flags);
+ }
+ spin_unlock(&inode->i_lock);
+ iput(inode);
+ goto restart;
+ }
+ spin_unlock(&nfs_access_lru_lock);
+ while (!list_empty(&head)) {
+ cache = list_entry(head.next, struct nfs_access_entry, lru);
+ list_del(&cache->lru);
+ nfs_access_free_entry(cache);
+ }
+ return (atomic_long_read(&nfs_access_nr_entries) / 100) * sysctl_vfs_cache_pressure;
+}
+
+static void __nfs_access_zap_cache(struct inode *inode)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+ struct rb_root *root_node = &nfsi->access_cache;
+ struct rb_node *n, *dispose = NULL;
+ struct nfs_access_entry *entry;
+
+ /* Unhook entries from the cache */
+ while ((n = rb_first(root_node)) != NULL) {
+ entry = rb_entry(n, struct nfs_access_entry, rb_node);
+ rb_erase(n, root_node);
+ list_del(&entry->lru);
+ n->rb_left = dispose;
+ dispose = n;
+ }
+ nfsi->cache_validity &= ~NFS_INO_INVALID_ACCESS;
+ spin_unlock(&inode->i_lock);
+
+ /* Now kill them all! */
+ while (dispose != NULL) {
+ n = dispose;
+ dispose = n->rb_left;
+ nfs_access_free_entry(rb_entry(n, struct nfs_access_entry, rb_node));
+ }
+}
+
+void nfs_access_zap_cache(struct inode *inode)
+{
+ /* Remove from global LRU init */
+ if (test_and_clear_bit(NFS_INO_ACL_LRU_SET, &NFS_FLAGS(inode))) {
+ spin_lock(&nfs_access_lru_lock);
+ list_del_init(&NFS_I(inode)->access_cache_inode_lru);
+ spin_unlock(&nfs_access_lru_lock);
+ }
+
+ spin_lock(&inode->i_lock);
+ /* This will release the spinlock */
+ __nfs_access_zap_cache(inode);
+}
+
+static struct nfs_access_entry *nfs_access_search_rbtree(struct inode *inode, struct rpc_cred *cred)
+{
+ struct rb_node *n = NFS_I(inode)->access_cache.rb_node;
+ struct nfs_access_entry *entry;
+
+ while (n != NULL) {
+ entry = rb_entry(n, struct nfs_access_entry, rb_node);
+
+ if (cred < entry->cred)
+ n = n->rb_left;
+ else if (cred > entry->cred)
+ n = n->rb_right;
+ else
+ return entry;
+ }
+ return NULL;
+}
+
int nfs_access_get_cached(struct inode *inode, struct rpc_cred *cred, struct nfs_access_entry *res)
{
struct nfs_inode *nfsi = NFS_I(inode);
- struct nfs_access_entry *cache = &nfsi->cache_access;
+ struct nfs_access_entry *cache;
+ int err = -ENOENT;
- if (cache->cred != cred
- || time_after(jiffies, cache->jiffies + NFS_ATTRTIMEO(inode))
- || (nfsi->cache_validity & NFS_INO_INVALID_ACCESS))
- return -ENOENT;
- memcpy(res, cache, sizeof(*res));
- return 0;
+ spin_lock(&inode->i_lock);
+ if (nfsi->cache_validity & NFS_INO_INVALID_ACCESS)
+ goto out_zap;
+ cache = nfs_access_search_rbtree(inode, cred);
+ if (cache == NULL)
+ goto out;
+ if (time_after(jiffies, cache->jiffies + NFS_ATTRTIMEO(inode)))
+ goto out_stale;
+ res->jiffies = cache->jiffies;
+ res->cred = cache->cred;
+ res->mask = cache->mask;
+ list_move_tail(&cache->lru, &nfsi->access_cache_entry_lru);
+ err = 0;
+out:
+ spin_unlock(&inode->i_lock);
+ return err;
+out_stale:
+ rb_erase(&cache->rb_node, &nfsi->access_cache);
+ list_del(&cache->lru);
+ spin_unlock(&inode->i_lock);
+ nfs_access_free_entry(cache);
+ return -ENOENT;
+out_zap:
+ /* This will release the spinlock */
+ __nfs_access_zap_cache(inode);
+ return -ENOENT;
}
-void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set)
+static void nfs_access_add_rbtree(struct inode *inode, struct nfs_access_entry *set)
{
struct nfs_inode *nfsi = NFS_I(inode);
- struct nfs_access_entry *cache = &nfsi->cache_access;
+ struct rb_root *root_node = &nfsi->access_cache;
+ struct rb_node **p = &root_node->rb_node;
+ struct rb_node *parent = NULL;
+ struct nfs_access_entry *entry;
- if (cache->cred != set->cred) {
- if (cache->cred)
- put_rpccred(cache->cred);
- cache->cred = get_rpccred(set->cred);
- }
- /* FIXME: replace current access_cache BKL reliance with inode->i_lock */
spin_lock(&inode->i_lock);
- nfsi->cache_validity &= ~NFS_INO_INVALID_ACCESS;
+ while (*p != NULL) {
+ parent = *p;
+ entry = rb_entry(parent, struct nfs_access_entry, rb_node);
+
+ if (set->cred < entry->cred)
+ p = &parent->rb_left;
+ else if (set->cred > entry->cred)
+ p = &parent->rb_right;
+ else
+ goto found;
+ }
+ rb_link_node(&set->rb_node, parent, p);
+ rb_insert_color(&set->rb_node, root_node);
+ list_add_tail(&set->lru, &nfsi->access_cache_entry_lru);
spin_unlock(&inode->i_lock);
+ return;
+found:
+ rb_replace_node(parent, &set->rb_node, root_node);
+ list_add_tail(&set->lru, &nfsi->access_cache_entry_lru);
+ list_del(&entry->lru);
+ spin_unlock(&inode->i_lock);
+ nfs_access_free_entry(entry);
+}
+
+void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set)
+{
+ struct nfs_access_entry *cache = kmalloc(sizeof(*cache), GFP_KERNEL);
+ if (cache == NULL)
+ return;
+ RB_CLEAR_NODE(&cache->rb_node);
cache->jiffies = set->jiffies;
+ cache->cred = get_rpccred(set->cred);
cache->mask = set->mask;
+
+ nfs_access_add_rbtree(inode, cache);
+
+ /* Update accounting */
+ smp_mb__before_atomic_inc();
+ atomic_long_inc(&nfs_access_nr_entries);
+ smp_mb__after_atomic_inc();
+
+ /* Add inode to global LRU list */
+ if (!test_and_set_bit(NFS_INO_ACL_LRU_SET, &NFS_FLAGS(inode))) {
+ spin_lock(&nfs_access_lru_lock);
+ list_add_tail(&NFS_I(inode)->access_cache_inode_lru, &nfs_access_lru_list);
+ spin_unlock(&nfs_access_lru_lock);
+ }
}
static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
nfs_inc_stats(inode, NFSIOS_VFSOPEN);
lock_kernel();
- res = NFS_SERVER(inode)->rpc_ops->file_open(inode, filp);
+ res = NFS_PROTO(inode)->file_open(inode, filp);
unlock_kernel();
return res;
}
static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
{
/* origin == SEEK_END => we must revalidate the cached file length */
- if (origin == 2) {
+ if (origin == SEEK_END) {
struct inode *inode = filp->f_mapping->host;
int retval = nfs_revalidate_file_size(inode, filp);
if (retval < 0)
--- /dev/null
+/* getroot.c: get the root dentry for an NFS mount
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/stats.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_mount.h>
+#include <linux/nfs4_mount.h>
+#include <linux/lockd/bind.h>
+#include <linux/smp_lock.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
+#include <linux/nfs_idmap.h>
+#include <linux/vfs.h>
+#include <linux/namei.h>
+#include <linux/namespace.h>
+#include <linux/security.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include "nfs4_fs.h"
+#include "delegation.h"
+#include "internal.h"
+
+#define NFSDBG_FACILITY NFSDBG_CLIENT
+#define NFS_PARANOIA 1
+
+/*
+ * get an NFS2/NFS3 root dentry from the root filehandle
+ */
+struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh)
+{
+ struct nfs_server *server = NFS_SB(sb);
+ struct nfs_fsinfo fsinfo;
+ struct nfs_fattr fattr;
+ struct dentry *mntroot;
+ struct inode *inode;
+ int error;
+
+ /* create a dummy root dentry with dummy inode for this superblock */
+ if (!sb->s_root) {
+ struct nfs_fh dummyfh;
+ struct dentry *root;
+ struct inode *iroot;
+
+ memset(&dummyfh, 0, sizeof(dummyfh));
+ memset(&fattr, 0, sizeof(fattr));
+ nfs_fattr_init(&fattr);
+ fattr.valid = NFS_ATTR_FATTR;
+ fattr.type = NFDIR;
+ fattr.mode = S_IFDIR | S_IRUSR | S_IWUSR;
+ fattr.nlink = 2;
+
+ iroot = nfs_fhget(sb, &dummyfh, &fattr);
+ if (IS_ERR(iroot))
+ return ERR_PTR(PTR_ERR(iroot));
+
+ root = d_alloc_root(iroot);
+ if (!root) {
+ iput(iroot);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ sb->s_root = root;
+ }
+
+ /* get the actual root for this mount */
+ fsinfo.fattr = &fattr;
+
+ error = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
+ if (error < 0) {
+ dprintk("nfs_get_root: getattr error = %d\n", -error);
+ return ERR_PTR(error);
+ }
+
+ inode = nfs_fhget(sb, mntfh, fsinfo.fattr);
+ if (IS_ERR(inode)) {
+ dprintk("nfs_get_root: get root inode failed\n");
+ return ERR_PTR(PTR_ERR(inode));
+ }
+
+ /* root dentries normally start off anonymous and get spliced in later
+ * if the dentry tree reaches them; however if the dentry already
+ * exists, we'll pick it up at this point and use it as the root
+ */
+ mntroot = d_alloc_anon(inode);
+ if (!mntroot) {
+ iput(inode);
+ dprintk("nfs_get_root: get root dentry failed\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ security_d_instantiate(mntroot, inode);
+
+ if (!mntroot->d_op)
+ mntroot->d_op = server->nfs_client->rpc_ops->dentry_ops;
+
+ return mntroot;
+}
+
+#ifdef CONFIG_NFS_V4
+
+/*
+ * Do a simple pathwalk from the root FH of the server to the nominated target
+ * of the mountpoint
+ * - give error on symlinks
+ * - give error on ".." occurring in the path
+ * - follow traversals
+ */
+int nfs4_path_walk(struct nfs_server *server,
+ struct nfs_fh *mntfh,
+ const char *path)
+{
+ struct nfs_fsinfo fsinfo;
+ struct nfs_fattr fattr;
+ struct nfs_fh lastfh;
+ struct qstr name;
+ int ret;
+ //int referral_count = 0;
+
+ dprintk("--> nfs4_path_walk(,,%s)\n", path);
+
+ fsinfo.fattr = &fattr;
+ nfs_fattr_init(&fattr);
+
+ if (*path++ != '/') {
+ dprintk("nfs4_get_root: Path does not begin with a slash\n");
+ return -EINVAL;
+ }
+
+ /* Start by getting the root filehandle from the server */
+ ret = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
+ if (ret < 0) {
+ dprintk("nfs4_get_root: getroot error = %d\n", -ret);
+ return ret;
+ }
+
+ if (fattr.type != NFDIR) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " getroot encountered non-directory\n");
+ return -ENOTDIR;
+ }
+
+ if (fattr.valid & NFS_ATTR_FATTR_V4_REFERRAL) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " getroot obtained referral\n");
+ return -EREMOTE;
+ }
+
+next_component:
+ dprintk("Next: %s\n", path);
+
+ /* extract the next bit of the path */
+ if (!*path)
+ goto path_walk_complete;
+
+ name.name = path;
+ while (*path && *path != '/')
+ path++;
+ name.len = path - (const char *) name.name;
+
+eat_dot_dir:
+ while (*path == '/')
+ path++;
+
+ if (path[0] == '.' && (path[1] == '/' || !path[1])) {
+ path += 2;
+ goto eat_dot_dir;
+ }
+
+ if (path[0] == '.' && path[1] == '.' && (path[2] == '/' || !path[2])
+ ) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " Mount path contains reference to \"..\"\n");
+ return -EINVAL;
+ }
+
+ /* lookup the next FH in the sequence */
+ memcpy(&lastfh, mntfh, sizeof(lastfh));
+
+ dprintk("LookupFH: %*.*s [%s]\n", name.len, name.len, name.name, path);
+
+ ret = server->nfs_client->rpc_ops->lookupfh(server, &lastfh, &name,
+ mntfh, &fattr);
+ if (ret < 0) {
+ dprintk("nfs4_get_root: getroot error = %d\n", -ret);
+ return ret;
+ }
+
+ if (fattr.type != NFDIR) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " lookupfh encountered non-directory\n");
+ return -ENOTDIR;
+ }
+
+ if (fattr.valid & NFS_ATTR_FATTR_V4_REFERRAL) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " lookupfh obtained referral\n");
+ return -EREMOTE;
+ }
+
+ goto next_component;
+
+path_walk_complete:
+ memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid));
+ dprintk("<-- nfs4_path_walk() = 0\n");
+ return 0;
+}
+
+/*
+ * get an NFS4 root dentry from the root filehandle
+ */
+struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
+{
+ struct nfs_server *server = NFS_SB(sb);
+ struct nfs_fattr fattr;
+ struct dentry *mntroot;
+ struct inode *inode;
+ int error;
+
+ dprintk("--> nfs4_get_root()\n");
+
+ /* create a dummy root dentry with dummy inode for this superblock */
+ if (!sb->s_root) {
+ struct nfs_fh dummyfh;
+ struct dentry *root;
+ struct inode *iroot;
+
+ memset(&dummyfh, 0, sizeof(dummyfh));
+ memset(&fattr, 0, sizeof(fattr));
+ nfs_fattr_init(&fattr);
+ fattr.valid = NFS_ATTR_FATTR;
+ fattr.type = NFDIR;
+ fattr.mode = S_IFDIR | S_IRUSR | S_IWUSR;
+ fattr.nlink = 2;
+
+ iroot = nfs_fhget(sb, &dummyfh, &fattr);
+ if (IS_ERR(iroot))
+ return ERR_PTR(PTR_ERR(iroot));
+
+ root = d_alloc_root(iroot);
+ if (!root) {
+ iput(iroot);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ sb->s_root = root;
+ }
+
+ /* get the info about the server and filesystem */
+ error = nfs4_server_capabilities(server, mntfh);
+ if (error < 0) {
+ dprintk("nfs_get_root: getcaps error = %d\n",
+ -error);
+ return ERR_PTR(error);
+ }
+
+ /* get the actual root for this mount */
+ error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr);
+ if (error < 0) {
+ dprintk("nfs_get_root: getattr error = %d\n", -error);
+ return ERR_PTR(error);
+ }
+
+ inode = nfs_fhget(sb, mntfh, &fattr);
+ if (IS_ERR(inode)) {
+ dprintk("nfs_get_root: get root inode failed\n");
+ return ERR_PTR(PTR_ERR(inode));
+ }
+
+ /* root dentries normally start off anonymous and get spliced in later
+ * if the dentry tree reaches them; however if the dentry already
+ * exists, we'll pick it up at this point and use it as the root
+ */
+ mntroot = d_alloc_anon(inode);
+ if (!mntroot) {
+ iput(inode);
+ dprintk("nfs_get_root: get root dentry failed\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ security_d_instantiate(mntroot, inode);
+
+ if (!mntroot->d_op)
+ mntroot->d_op = server->nfs_client->rpc_ops->dentry_ops;
+
+ dprintk("<-- nfs4_get_root()\n");
+ return mntroot;
+}
+
+#endif /* CONFIG_NFS_V4 */
/* Default cache timeout is 10 minutes */
unsigned int nfs_idmap_cache_timeout = 600 * HZ;
+static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
+{
+ char *endp;
+ int num = simple_strtol(val, &endp, 0);
+ int jif = num * HZ;
+ if (endp == val || *endp || num < 0 || jif < num)
+ return -EINVAL;
+ *((int *)kp->arg) = jif;
+ return 0;
+}
+
+module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
+ &nfs_idmap_cache_timeout, 0644);
+
struct idmap_hashent {
unsigned long ih_expires;
__u32 ih_id;
};
struct idmap {
- char idmap_path[48];
struct dentry *idmap_dentry;
wait_queue_head_t idmap_wq;
struct idmap_msg idmap_im;
.destroy_msg = idmap_pipe_destroy_msg,
};
-void
-nfs_idmap_new(struct nfs4_client *clp)
+int
+nfs_idmap_new(struct nfs_client *clp)
{
struct idmap *idmap;
+ int error;
- if (clp->cl_idmap != NULL)
- return;
- if ((idmap = kzalloc(sizeof(*idmap), GFP_KERNEL)) == NULL)
- return;
+ BUG_ON(clp->cl_idmap != NULL);
- snprintf(idmap->idmap_path, sizeof(idmap->idmap_path),
- "%s/idmap", clp->cl_rpcclient->cl_pathname);
+ if ((idmap = kzalloc(sizeof(*idmap), GFP_KERNEL)) == NULL)
+ return -ENOMEM;
- idmap->idmap_dentry = rpc_mkpipe(idmap->idmap_path,
+ idmap->idmap_dentry = rpc_mkpipe(clp->cl_rpcclient->cl_dentry, "idmap",
idmap, &idmap_upcall_ops, 0);
if (IS_ERR(idmap->idmap_dentry)) {
+ error = PTR_ERR(idmap->idmap_dentry);
kfree(idmap);
- return;
+ return error;
}
mutex_init(&idmap->idmap_lock);
idmap->idmap_group_hash.h_type = IDMAP_TYPE_GROUP;
clp->cl_idmap = idmap;
+ return 0;
}
void
-nfs_idmap_delete(struct nfs4_client *clp)
+nfs_idmap_delete(struct nfs_client *clp)
{
struct idmap *idmap = clp->cl_idmap;
return (hash);
}
-int nfs_map_name_to_uid(struct nfs4_client *clp, const char *name, size_t namelen, __u32 *uid)
+int nfs_map_name_to_uid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_id(idmap, &idmap->idmap_user_hash, name, namelen, uid);
}
-int nfs_map_group_to_gid(struct nfs4_client *clp, const char *name, size_t namelen, __u32 *uid)
+int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_id(idmap, &idmap->idmap_group_hash, name, namelen, uid);
}
-int nfs_map_uid_to_name(struct nfs4_client *clp, __u32 uid, char *buf)
+int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
}
-int nfs_map_gid_to_group(struct nfs4_client *clp, __u32 uid, char *buf)
+int nfs_map_gid_to_group(struct nfs_client *clp, __u32 uid, char *buf)
{
struct idmap *idmap = clp->cl_idmap;
void nfs_clear_inode(struct inode *inode)
{
- struct nfs_inode *nfsi = NFS_I(inode);
- struct rpc_cred *cred;
-
/*
* The following should never happen...
*/
BUG_ON(nfs_have_writebacks(inode));
- BUG_ON (!list_empty(&nfsi->open_files));
+ BUG_ON(!list_empty(&NFS_I(inode)->open_files));
+ BUG_ON(atomic_read(&NFS_I(inode)->data_updates) != 0);
nfs_zap_acl_cache(inode);
- cred = nfsi->cache_access.cred;
- if (cred)
- put_rpccred(cred);
- BUG_ON(atomic_read(&nfsi->data_updates) != 0);
+ nfs_access_zap_cache(inode);
}
/**
/* Why so? Because we want revalidate for devices/FIFOs, and
* that's precisely what we have in nfs_file_inode_operations.
*/
- inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops;
+ inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
if (S_ISREG(inode->i_mode)) {
inode->i_fop = &nfs_file_operations;
inode->i_data.a_ops = &nfs_file_aops;
inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
} else if (S_ISDIR(inode->i_mode)) {
- inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops;
+ inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
inode->i_fop = &nfs_dir_operations;
if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
&& fattr->size <= NFS_LIMIT_READDIRPLUS)
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
nfsi->attrtimeo_timestamp = jiffies;
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
- nfsi->cache_access.cred = NULL;
+ nfsi->access_cache = RB_ROOT;
unlock_new_inode(inode);
} else
{
struct nfs_inode *nfsi = NFS_I(inode);
- if (!nfs_have_delegation(inode, FMODE_READ)) {
- /* Directories and symlinks: invalidate page cache */
- if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) {
- spin_lock(&inode->i_lock);
- nfsi->cache_validity |= NFS_INO_INVALID_DATA;
- spin_unlock(&inode->i_lock);
- }
+ /* Directories: invalidate page cache */
+ if (S_ISDIR(inode->i_mode)) {
+ spin_lock(&inode->i_lock);
+ nfsi->cache_validity |= NFS_INO_INVALID_DATA;
+ spin_unlock(&inode->i_lock);
}
nfsi->cache_change_attribute = jiffies;
atomic_dec(&nfsi->data_updates);
*
* After an operation that has changed the inode metadata, mark the
* attribute cache as being invalid, then try to update it.
+ *
+ * NB: if the server didn't return any post op attributes, this
+ * function will force the retrieval of attributes before the next
+ * NFS request. Thus it should be used only for operations that
+ * are expected to change one or more attributes, to avoid
+ * unnecessary NFS requests and trips through nfs_update_inode().
*/
int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
{
out_fileid:
printk(KERN_ERR "NFS: server %s error: fileid changed\n"
"fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
- NFS_SERVER(inode)->hostname, inode->i_sb->s_id,
+ NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
(long long)nfsi->fileid, (long long)fattr->fileid);
goto out_err;
}
INIT_LIST_HEAD(&nfsi->dirty);
INIT_LIST_HEAD(&nfsi->commit);
INIT_LIST_HEAD(&nfsi->open_files);
+ INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
+ INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
atomic_set(&nfsi->data_updates, 0);
nfsi->ndirty = 0;
{
int err;
+ err = nfs_fs_proc_init();
+ if (err)
+ goto out5;
+
err = nfs_init_nfspagecache();
if (err)
goto out4;
out3:
nfs_destroy_nfspagecache();
out4:
+ nfs_fs_proc_exit();
+out5:
return err;
}
rpc_proc_unregister("nfs");
#endif
unregister_nfs_fs();
+ nfs_fs_proc_exit();
}
/* Not quite true; I just maintain it */
#include <linux/mount.h>
+struct nfs_string;
+struct nfs_mount_data;
+struct nfs4_mount_data;
+
+/* Maximum number of readahead requests
+ * FIXME: this should really be a sysctl so that users may tune it to suit
+ * their needs. People that do NFS over a slow network, might for
+ * instance want to reduce it to something closer to 1 for improved
+ * interactive response.
+ */
+#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
+
struct nfs_clone_mount {
const struct super_block *sb;
const struct dentry *dentry;
rpc_authflavor_t authflavor;
};
-/* namespace-nfs4.c */
+/* client.c */
+extern struct rpc_program nfs_program;
+
+extern void nfs_put_client(struct nfs_client *);
+extern struct nfs_client *nfs_find_client(const struct sockaddr_in *, int);
+extern struct nfs_server *nfs_create_server(const struct nfs_mount_data *,
+ struct nfs_fh *);
+extern struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *,
+ const char *,
+ const struct sockaddr_in *,
+ const char *,
+ const char *,
+ rpc_authflavor_t,
+ struct nfs_fh *);
+extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
+ struct nfs_fh *);
+extern void nfs_free_server(struct nfs_server *server);
+extern struct nfs_server *nfs_clone_server(struct nfs_server *,
+ struct nfs_fh *,
+ struct nfs_fattr *);
+#ifdef CONFIG_PROC_FS
+extern int __init nfs_fs_proc_init(void);
+extern void nfs_fs_proc_exit(void);
+#else
+static inline int nfs_fs_proc_init(void)
+{
+ return 0;
+}
+static inline void nfs_fs_proc_exit(void)
+{
+}
+#endif
+
+/* nfs4namespace.c */
#ifdef CONFIG_NFS_V4
extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
#else
#endif
/* nfs2xdr.c */
+extern int nfs_stat_to_errno(int);
extern struct rpc_procinfo nfs_procedures[];
extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
/* nfs4xdr.c */
-extern int nfs_stat_to_errno(int);
+#ifdef CONFIG_NFS_V4
extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
+#endif
/* nfs4proc.c */
#ifdef CONFIG_NFS_V4
struct page *page);
#endif
+/* dir.c */
+extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask);
+
/* inode.c */
extern struct inode *nfs_alloc_inode(struct super_block *sb);
extern void nfs_destroy_inode(struct inode *);
#endif
/* super.c */
-extern struct file_system_type nfs_referral_nfs4_fs_type;
-extern struct file_system_type clone_nfs_fs_type;
+extern struct file_system_type nfs_xdev_fs_type;
#ifdef CONFIG_NFS_V4
-extern struct file_system_type clone_nfs4_fs_type;
+extern struct file_system_type nfs4_xdev_fs_type;
+extern struct file_system_type nfs4_referral_fs_type;
#endif
extern struct rpc_stat nfs_rpcstat;
extern void __exit unregister_nfs_fs(void);
/* namespace.c */
-extern char *nfs_path(const char *base, const struct dentry *dentry,
+extern char *nfs_path(const char *base,
+ const struct dentry *droot,
+ const struct dentry *dentry,
char *buffer, ssize_t buflen);
-/*
- * Determine the mount path as a string
- */
-static inline char *
-nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen)
-{
+/* getroot.c */
+extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *);
#ifdef CONFIG_NFS_V4
- return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen);
-#else
- return NULL;
+extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *);
+
+extern int nfs4_path_walk(struct nfs_server *server,
+ struct nfs_fh *mntfh,
+ const char *path);
#endif
-}
/*
* Determine the device name as a string
*/
static inline char *nfs_devname(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
- char *buffer, ssize_t buflen)
+ const struct dentry *dentry,
+ char *buffer, ssize_t buflen)
{
- return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
+ return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root,
+ dentry, buffer, buflen);
}
/*
if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
sb->s_maxbytes = MAX_LFS_FILESIZE;
}
-
-/*
- * Check if the string represents a "valid" IPv4 address
- */
-static inline int valid_ipaddr4(const char *buf)
-{
- int rc, count, in[4];
-
- rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
- if (rc != 4)
- return -EINVAL;
- for (count = 0; count < 4; count++) {
- if (in[count] > 255)
- return -EINVAL;
- }
- return 0;
-}
#include <linux/net.h>
#include <linux/in.h>
#include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/xprt.h>
#include <linux/sunrpc/sched.h>
#include <linux/nfs_fs.h>
mnt_create(char *hostname, struct sockaddr_in *srvaddr, int version,
int protocol)
{
- struct rpc_xprt *xprt;
- struct rpc_clnt *clnt;
-
- xprt = xprt_create_proto(protocol, srvaddr, NULL);
- if (IS_ERR(xprt))
- return (struct rpc_clnt *)xprt;
-
- clnt = rpc_create_client(xprt, hostname,
- &mnt_program, version,
- RPC_AUTH_UNIX);
- if (!IS_ERR(clnt)) {
- clnt->cl_softrtry = 1;
- clnt->cl_oneshot = 1;
- clnt->cl_intr = 1;
- }
- return clnt;
+ struct rpc_create_args args = {
+ .protocol = protocol,
+ .address = (struct sockaddr *)srvaddr,
+ .addrsize = sizeof(*srvaddr),
+ .servername = hostname,
+ .program = &mnt_program,
+ .version = version,
+ .authflavor = RPC_AUTH_UNIX,
+ .flags = (RPC_CLNT_CREATE_ONESHOT |
+ RPC_CLNT_CREATE_INTR),
+ };
+
+ return rpc_create(&args);
}
/*
* linux/fs/nfs/namespace.c
*
* Copyright (C) 2005 Trond Myklebust <Trond.Myklebust@netapp.com>
+ * - Modified by David Howells <dhowells@redhat.com>
*
* NFS namespace
*/
/*
* nfs_path - reconstruct the path given an arbitrary dentry
* @base - arbitrary string to prepend to the path
+ * @droot - pointer to root dentry for mountpoint
* @dentry - pointer to dentry
* @buffer - result buffer
* @buflen - length of buffer
* This is mainly for use in figuring out the path on the
* server side when automounting on top of an existing partition.
*/
-char *nfs_path(const char *base, const struct dentry *dentry,
+char *nfs_path(const char *base,
+ const struct dentry *droot,
+ const struct dentry *dentry,
char *buffer, ssize_t buflen)
{
char *end = buffer+buflen;
*--end = '\0';
buflen--;
spin_lock(&dcache_lock);
- while (!IS_ROOT(dentry)) {
+ while (!IS_ROOT(dentry) && dentry != droot) {
namelen = dentry->d_name.len;
buflen -= namelen + 1;
if (buflen < 0)
struct nfs_fattr fattr;
int err;
+ dprintk("--> nfs_follow_mountpoint()\n");
+
BUG_ON(IS_ROOT(dentry));
dprintk("%s: enter\n", __FUNCTION__);
dput(nd->dentry);
nd->dentry = dget(dentry);
- if (d_mountpoint(nd->dentry))
- goto out_follow;
+
/* Look it up again */
parent = dget_parent(nd->dentry);
- err = server->rpc_ops->lookup(parent->d_inode, &nd->dentry->d_name, &fh, &fattr);
+ err = server->nfs_client->rpc_ops->lookup(parent->d_inode,
+ &nd->dentry->d_name,
+ &fh, &fattr);
dput(parent);
if (err != 0)
goto out_err;
schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout);
out:
dprintk("%s: done, returned %d\n", __FUNCTION__, err);
+
+ dprintk("<-- nfs_follow_mountpoint() = %d\n", err);
return ERR_PTR(err);
out_err:
path_release(nd);
/*
* Clone a mountpoint of the appropriate type
*/
-static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname,
+static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server,
+ const char *devname,
struct nfs_clone_mount *mountdata)
{
#ifdef CONFIG_NFS_V4
struct vfsmount *mnt = NULL;
- switch (server->rpc_ops->version) {
+ switch (server->nfs_client->cl_nfsversion) {
case 2:
case 3:
- mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
+ mnt = vfs_kern_mount(&nfs_xdev_fs_type, 0, devname, mountdata);
break;
case 4:
- mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata);
+ mnt = vfs_kern_mount(&nfs4_xdev_fs_type, 0, devname, mountdata);
}
return mnt;
#else
- return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
+ return vfs_kern_mount(&nfs_xdev_fs_type, 0, devname, mountdata);
#endif
}
char *page = (char *) __get_free_page(GFP_USER);
char *devname;
+ dprintk("--> nfs_do_submount()\n");
+
dprintk("%s: submounting on %s/%s\n", __FUNCTION__,
dentry->d_parent->d_name.name,
dentry->d_name.name);
free_page((unsigned long)page);
out:
dprintk("%s: done\n", __FUNCTION__);
+
+ dprintk("<-- nfs_do_submount() = %p\n", mnt);
return mnt;
}
#define NFS_createargs_sz (NFS_diropargs_sz+NFS_sattr_sz)
#define NFS_renameargs_sz (NFS_diropargs_sz+NFS_diropargs_sz)
#define NFS_linkargs_sz (NFS_fhandle_sz+NFS_diropargs_sz)
-#define NFS_symlinkargs_sz (NFS_diropargs_sz+NFS_path_sz+NFS_sattr_sz)
+#define NFS_symlinkargs_sz (NFS_diropargs_sz+1+NFS_sattr_sz)
#define NFS_readdirargs_sz (NFS_fhandle_sz+2)
#define NFS_attrstat_sz (1+NFS_fattr_sz)
static int
nfs_xdr_symlinkargs(struct rpc_rqst *req, u32 *p, struct nfs_symlinkargs *args)
{
+ struct xdr_buf *sndbuf = &req->rq_snd_buf;
+ size_t pad;
+
p = xdr_encode_fhandle(p, args->fromfh);
p = xdr_encode_array(p, args->fromname, args->fromlen);
- p = xdr_encode_array(p, args->topath, args->tolen);
+ *p++ = htonl(args->pathlen);
+ sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
+
+ xdr_encode_pages(sndbuf, args->pages, 0, args->pathlen);
+
+ /*
+ * xdr_encode_pages may have added a few bytes to ensure the
+ * pathname ends on a 4-byte boundary. Start encoding the
+ * attributes after the pad bytes.
+ */
+ pad = sndbuf->tail->iov_len;
+ if (pad > 0)
+ p++;
p = xdr_encode_sattr(p, args->sattr);
- req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+ sndbuf->len += xdr_adjust_iovec(sndbuf->tail, p) - pad;
return 0;
}
}
/*
- * Bare-bones access to getattr: this is for nfs_read_super.
+ * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
*/
static int
nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
int status;
status = do_proc_get_root(server->client, fhandle, info);
- if (status && server->client_sys != server->client)
- status = do_proc_get_root(server->client_sys, fhandle, info);
+ if (status && server->nfs_client->cl_rpcclient != server->client)
+ status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
return status;
}
}
static int
-nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
- struct iattr *sattr, struct nfs_fh *fhandle,
- struct nfs_fattr *fattr)
+nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
+ unsigned int len, struct iattr *sattr)
{
- struct nfs_fattr dir_attr;
+ struct nfs_fh fhandle;
+ struct nfs_fattr fattr, dir_attr;
struct nfs3_symlinkargs arg = {
.fromfh = NFS_FH(dir),
- .fromname = name->name,
- .fromlen = name->len,
- .topath = path->name,
- .tolen = path->len,
+ .fromname = dentry->d_name.name,
+ .fromlen = dentry->d_name.len,
+ .pages = &page,
+ .pathlen = len,
.sattr = sattr
};
struct nfs3_diropres res = {
.dir_attr = &dir_attr,
- .fh = fhandle,
- .fattr = fattr
+ .fh = &fhandle,
+ .fattr = &fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK],
};
int status;
- if (path->len > NFS3_MAXPATHLEN)
+ if (len > NFS3_MAXPATHLEN)
return -ENAMETOOLONG;
- dprintk("NFS call symlink %s -> %s\n", name->name, path->name);
+
+ dprintk("NFS call symlink %s\n", dentry->d_name.name);
+
nfs_fattr_init(&dir_attr);
- nfs_fattr_init(fattr);
+ nfs_fattr_init(&fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_post_op_update_inode(dir, &dir_attr);
+ if (status != 0)
+ goto out;
+ status = nfs_instantiate(dentry, &fhandle, &fattr);
+out:
dprintk("NFS reply symlink: %d\n", status);
return status;
}
dprintk("NFS call fsinfo\n");
nfs_fattr_init(info->fattr);
- status = rpc_call_sync(server->client_sys, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
dprintk("NFS reply fsinfo: %d\n", status);
return status;
}
return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
}
-struct nfs_rpc_ops nfs_v3_clientops = {
+const struct nfs_rpc_ops nfs_v3_clientops = {
.version = 3, /* protocol version */
.dentry_ops = &nfs_dentry_operations,
.dir_inode_ops = &nfs3_dir_inode_operations,
#define NFS3_writeargs_sz (NFS3_fh_sz+5)
#define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
#define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
-#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+NFS3_path_sz+NFS3_sattr_sz)
+#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
#define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
#define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
#define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
p = xdr_encode_fhandle(p, args->fromfh);
p = xdr_encode_array(p, args->fromname, args->fromlen);
p = xdr_encode_sattr(p, args->sattr);
- p = xdr_encode_array(p, args->topath, args->tolen);
+ *p++ = htonl(args->pathlen);
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+
+ /* Copy the page */
+ xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen);
return 0;
}
NFS4CLNT_LEASE_EXPIRED,
};
-/*
- * The nfs4_client identifies our client state to the server.
- */
-struct nfs4_client {
- struct list_head cl_servers; /* Global list of servers */
- struct in_addr cl_addr; /* Server identifier */
- u64 cl_clientid; /* constant */
- nfs4_verifier cl_confirm;
- unsigned long cl_state;
-
- u32 cl_lockowner_id;
-
- /*
- * The following rwsem ensures exclusive access to the server
- * while we recover the state following a lease expiration.
- */
- struct rw_semaphore cl_sem;
-
- struct list_head cl_delegations;
- struct list_head cl_state_owners;
- struct list_head cl_unused;
- int cl_nunused;
- spinlock_t cl_lock;
- atomic_t cl_count;
-
- struct rpc_clnt * cl_rpcclient;
-
- struct list_head cl_superblocks; /* List of nfs_server structs */
-
- unsigned long cl_lease_time;
- unsigned long cl_last_renewal;
- struct work_struct cl_renewd;
- struct work_struct cl_recoverd;
-
- struct rpc_wait_queue cl_rpcwaitq;
-
- /* used for the setclientid verifier */
- struct timespec cl_boot_time;
-
- /* idmapper */
- struct idmap * cl_idmap;
-
- /* Our own IP address, as a null-terminated string.
- * This is used to generate the clientid, and the callback address.
- */
- char cl_ipaddr[16];
- unsigned char cl_id_uniquifier;
-};
-
/*
* struct rpc_sequence ensures that RPC calls are sent in the exact
* order that they appear on the list.
struct nfs4_state_owner {
spinlock_t so_lock;
struct list_head so_list; /* per-clientid list of state_owners */
- struct nfs4_client *so_client;
+ struct nfs_client *so_client;
u32 so_id; /* 32-bit identifier, unique */
atomic_t so_count;
/* nfs4proc.c */
extern int nfs4_map_errors(int err);
-extern int nfs4_proc_setclientid(struct nfs4_client *, u32, unsigned short, struct rpc_cred *);
-extern int nfs4_proc_setclientid_confirm(struct nfs4_client *, struct rpc_cred *);
-extern int nfs4_proc_async_renew(struct nfs4_client *, struct rpc_cred *);
-extern int nfs4_proc_renew(struct nfs4_client *, struct rpc_cred *);
+extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *);
+extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
+extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
+extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state);
extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
extern const u32 nfs4_fs_locations_bitmap[2];
/* nfs4renewd.c */
-extern void nfs4_schedule_state_renewal(struct nfs4_client *);
+extern void nfs4_schedule_state_renewal(struct nfs_client *);
extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
-extern void nfs4_kill_renewd(struct nfs4_client *);
+extern void nfs4_kill_renewd(struct nfs_client *);
extern void nfs4_renew_state(void *);
/* nfs4state.c */
-extern void init_nfsv4_state(struct nfs_server *);
-extern void destroy_nfsv4_state(struct nfs_server *);
-extern struct nfs4_client *nfs4_get_client(struct in_addr *);
-extern void nfs4_put_client(struct nfs4_client *clp);
-extern struct nfs4_client *nfs4_find_client(struct in_addr *);
-struct rpc_cred *nfs4_get_renew_cred(struct nfs4_client *clp);
-extern u32 nfs4_alloc_lockowner_id(struct nfs4_client *);
+struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp);
+extern u32 nfs4_alloc_lockowner_id(struct nfs_client *);
extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
extern void nfs4_put_open_state(struct nfs4_state *);
extern void nfs4_close_state(struct nfs4_state *, mode_t);
extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
-extern void nfs4_schedule_state_recovery(struct nfs4_client *);
+extern void nfs4_schedule_state_recovery(struct nfs_client *);
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
#else
-#define init_nfsv4_state(server) do { } while (0)
-#define destroy_nfsv4_state(server) do { } while (0)
-#define nfs4_put_state_owner(inode, owner) do { } while (0)
-#define nfs4_put_open_state(state) do { } while (0)
#define nfs4_close_state(a, b) do { } while (0)
#endif /* CONFIG_NFS_V4 */
* linux/fs/nfs/nfs4namespace.c
*
* Copyright (C) 2005 Trond Myklebust <Trond.Myklebust@netapp.com>
+ * - Modified by David Howells <dhowells@redhat.com>
*
* NFSv4 namespace
*/
/*
* Check if fs_root is valid
*/
-static inline char *nfs4_pathname_string(struct nfs4_pathname *pathname,
+static inline char *nfs4_pathname_string(const struct nfs4_pathname *pathname,
char *buffer, ssize_t buflen)
{
char *end = buffer + buflen;
n = pathname->ncomponents;
while (--n >= 0) {
- struct nfs4_string *component = &pathname->components[n];
+ const struct nfs4_string *component = &pathname->components[n];
buflen -= component->len + 1;
if (buflen < 0)
goto Elong;
return ERR_PTR(-ENAMETOOLONG);
}
+/*
+ * Determine the mount path as a string
+ */
+static char *nfs4_path(const struct vfsmount *mnt_parent,
+ const struct dentry *dentry,
+ char *buffer, ssize_t buflen)
+{
+ const char *srvpath;
+
+ srvpath = strchr(mnt_parent->mnt_devname, ':');
+ if (srvpath)
+ srvpath++;
+ else
+ srvpath = mnt_parent->mnt_devname;
+
+ return nfs_path(srvpath, mnt_parent->mnt_root, dentry, buffer, buflen);
+}
+
+/*
+ * Check that fs_locations::fs_root [RFC3530 6.3] is a prefix for what we
+ * believe to be the server path to this dentry
+ */
+static int nfs4_validate_fspath(const struct vfsmount *mnt_parent,
+ const struct dentry *dentry,
+ const struct nfs4_fs_locations *locations,
+ char *page, char *page2)
+{
+ const char *path, *fs_path;
+
+ path = nfs4_path(mnt_parent, dentry, page, PAGE_SIZE);
+ if (IS_ERR(path))
+ return PTR_ERR(path);
+
+ fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE);
+ if (IS_ERR(fs_path))
+ return PTR_ERR(fs_path);
+
+ if (strncmp(path, fs_path, strlen(fs_path)) != 0) {
+ dprintk("%s: path %s does not begin with fsroot %s\n",
+ __FUNCTION__, path, fs_path);
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
+/*
+ * Check if the string represents a "valid" IPv4 address
+ */
+static inline int valid_ipaddr4(const char *buf)
+{
+ int rc, count, in[4];
+
+ rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
+ if (rc != 4)
+ return -EINVAL;
+ for (count = 0; count < 4; count++) {
+ if (in[count] > 255)
+ return -EINVAL;
+ }
+ return 0;
+}
/**
* nfs_follow_referral - set up mountpoint when hitting a referral on moved error
*/
static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
const struct dentry *dentry,
- struct nfs4_fs_locations *locations)
+ const struct nfs4_fs_locations *locations)
{
struct vfsmount *mnt = ERR_PTR(-ENOENT);
struct nfs_clone_mount mountdata = {
.dentry = dentry,
.authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor,
};
- char *page, *page2;
- char *path, *fs_path;
+ char *page = NULL, *page2 = NULL;
char *devname;
- int loc, s;
+ int loc, s, error;
if (locations == NULL || locations->nlocations <= 0)
goto out;
dprintk("%s: referral at %s/%s\n", __FUNCTION__,
dentry->d_parent->d_name.name, dentry->d_name.name);
- /* Ensure fs path is a prefix of current dentry path */
page = (char *) __get_free_page(GFP_USER);
- if (page == NULL)
+ if (!page)
goto out;
+
page2 = (char *) __get_free_page(GFP_USER);
- if (page2 == NULL)
+ if (!page2)
goto out;
- path = nfs4_path(dentry, page, PAGE_SIZE);
- if (IS_ERR(path))
- goto out_free;
-
- fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE);
- if (IS_ERR(fs_path))
- goto out_free;
-
- if (strncmp(path, fs_path, strlen(fs_path)) != 0) {
- dprintk("%s: path %s does not begin with fsroot %s\n", __FUNCTION__, path, fs_path);
- goto out_free;
+ /* Ensure fs path is a prefix of current dentry path */
+ error = nfs4_validate_fspath(mnt_parent, dentry, locations, page, page2);
+ if (error < 0) {
+ mnt = ERR_PTR(error);
+ goto out;
}
devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
if (IS_ERR(devname)) {
mnt = (struct vfsmount *)devname;
- goto out_free;
+ goto out;
}
loc = 0;
while (loc < locations->nlocations && IS_ERR(mnt)) {
- struct nfs4_fs_location *location = &locations->locations[loc];
+ const struct nfs4_fs_location *location = &locations->locations[loc];
char *mnt_path;
if (location == NULL || location->nservers <= 0 ||
addr.sin_port = htons(NFS_PORT);
mountdata.addr = &addr;
- mnt = vfs_kern_mount(&nfs_referral_nfs4_fs_type, 0, devname, &mountdata);
+ mnt = vfs_kern_mount(&nfs4_referral_fs_type, 0, devname, &mountdata);
if (!IS_ERR(mnt)) {
break;
}
loc++;
}
-out_free:
- free_page((unsigned long)page);
- free_page((unsigned long)page2);
out:
+ free_page((unsigned long) page);
+ free_page((unsigned long) page2);
dprintk("%s: done\n", __FUNCTION__);
return mnt;
}
*/
struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
{
- struct vfsmount *mnt = ERR_PTR(-ENOENT);
+ struct vfsmount *mnt = ERR_PTR(-ENOMEM);
struct dentry *parent;
struct nfs4_fs_locations *fs_locations = NULL;
struct page *page;
goto out_free;
/* Get locations */
+ mnt = ERR_PTR(-ENOENT);
+
parent = dget_parent(dentry);
- dprintk("%s: getting locations for %s/%s\n", __FUNCTION__, parent->d_name.name, dentry->d_name.name);
+ dprintk("%s: getting locations for %s/%s\n",
+ __FUNCTION__, parent->d_name.name, dentry->d_name.name);
+
err = nfs4_proc_fs_locations(parent->d_inode, dentry, fs_locations, page);
dput(parent);
- if (err != 0 || fs_locations->nlocations <= 0 ||
+ if (err != 0 ||
+ fs_locations->nlocations <= 0 ||
fs_locations->fs_path.ncomponents <= 0)
goto out_free;
#define NFSDBG_FACILITY NFSDBG_PROC
-#define NFS4_POLL_RETRY_MIN (1*HZ)
+#define NFS4_POLL_RETRY_MIN (HZ/10)
#define NFS4_POLL_RETRY_MAX (15*HZ)
struct nfs4_opendata;
static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
-static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp);
+static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
/* Prevent leaks of NFSv4 errors into userland */
int nfs4_map_errors(int err)
static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
spin_lock(&clp->cl_lock);
if (time_before(clp->cl_last_renewal,timestamp))
clp->cl_last_renewal = timestamp;
atomic_inc(&sp->so_count);
p->o_arg.fh = NFS_FH(dir);
p->o_arg.open_flags = flags,
- p->o_arg.clientid = server->nfs4_state->cl_clientid;
+ p->o_arg.clientid = server->nfs_client->cl_clientid;
p->o_arg.id = sp->so_id;
p->o_arg.name = &dentry->d_name;
p->o_arg.server = server;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
/* Don't recall a delegation if it was lost */
- nfs4_schedule_state_recovery(server->nfs4_state);
+ nfs4_schedule_state_recovery(server->nfs_client);
return err;
}
err = nfs4_handle_exception(server, err, &exception);
}
nfs_confirm_seqid(&data->owner->so_seqid, 0);
if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
- return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
+ return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
return 0;
}
int nfs4_recover_expired_lease(struct nfs_server *server)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
+ int ret;
- if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
+ for (;;) {
+ ret = nfs4_wait_clnt_recover(server->client, clp);
+ if (ret != 0)
+ return ret;
+ if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
+ break;
nfs4_schedule_state_recovery(clp);
- return nfs4_wait_clnt_recover(server->client, clp);
+ }
+ return 0;
}
/*
{
struct nfs_delegation *delegation;
struct nfs_server *server = NFS_SERVER(inode);
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs4_state_owner *sp = NULL;
struct nfs4_state *state = NULL;
struct nfs4_state_owner *sp;
struct nfs4_state *state = NULL;
struct nfs_server *server = NFS_SERVER(dir);
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs4_opendata *opendata;
int status;
break;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
- nfs4_schedule_state_recovery(server->nfs4_state);
+ nfs4_schedule_state_recovery(server->nfs_client);
break;
default:
if (nfs4_async_handle_error(task, server) == -EAGAIN) {
BUG_ON(nd->intent.open.flags & O_CREAT);
}
- cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
+ cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
if (IS_ERR(cred))
return (struct dentry *)cred;
state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
struct rpc_cred *cred;
struct nfs4_state *state;
- cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
+ cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
if (IS_ERR(cred))
return PTR_ERR(cred);
state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
return err;
}
+/*
+ * get the file handle for the "/" directory on the server
+ */
static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
- struct nfs_fsinfo *info)
+ struct nfs_fsinfo *info)
{
- struct nfs_fattr * fattr = info->fattr;
- unsigned char * p;
- struct qstr q;
- struct nfs4_lookup_arg args = {
- .dir_fh = fhandle,
- .name = &q,
- .bitmask = nfs4_fattr_bitmap,
- };
- struct nfs4_lookup_res res = {
- .server = server,
- .fattr = fattr,
- .fh = fhandle,
- };
- struct rpc_message msg = {
- .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
- .rpc_argp = &args,
- .rpc_resp = &res,
- };
int status;
- /*
- * Now we do a separate LOOKUP for each component of the mount path.
- * The LOOKUPs are done separately so that we can conveniently
- * catch an ERR_WRONGSEC if it occurs along the way...
- */
status = nfs4_lookup_root(server, fhandle, info);
- if (status)
- goto out;
-
- p = server->mnt_path;
- for (;;) {
- struct nfs4_exception exception = { };
-
- while (*p == '/')
- p++;
- if (!*p)
- break;
- q.name = p;
- while (*p && (*p != '/'))
- p++;
- q.len = p - q.name;
-
- do {
- nfs_fattr_init(fattr);
- status = nfs4_handle_exception(server,
- rpc_call_sync(server->client, &msg, 0),
- &exception);
- } while (exception.retry);
- if (status == 0)
- continue;
- if (status == -ENOENT) {
- printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
- printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
- }
- break;
- }
if (status == 0)
status = nfs4_server_capabilities(server, fhandle);
if (status == 0)
status = nfs4_do_fsinfo(server, fhandle, info);
-out:
return nfs4_map_errors(status);
}
nfs_fattr_init(fattr);
- cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
+ cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
if (IS_ERR(cred))
return PTR_ERR(cred);
return status;
}
+static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
+ struct qstr *name, struct nfs_fh *fhandle,
+ struct nfs_fattr *fattr)
+{
+ int status;
+ struct nfs4_lookup_arg args = {
+ .bitmask = server->attr_bitmask,
+ .dir_fh = dirfh,
+ .name = name,
+ };
+ struct nfs4_lookup_res res = {
+ .server = server,
+ .fattr = fattr,
+ .fh = fhandle,
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
+ .rpc_argp = &args,
+ .rpc_resp = &res,
+ };
+
+ nfs_fattr_init(fattr);
+
+ dprintk("NFS call lookupfh %s\n", name->name);
+ status = rpc_call_sync(server->client, &msg, 0);
+ dprintk("NFS reply lookupfh: %d\n", status);
+ if (status == -NFS4ERR_MOVED)
+ status = -EREMOTE;
+ return status;
+}
+
+static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
+ struct qstr *name, struct nfs_fh *fhandle,
+ struct nfs_fattr *fattr)
+{
+ struct nfs4_exception exception = { };
+ int err;
+ do {
+ err = nfs4_handle_exception(server,
+ _nfs4_proc_lookupfh(server, dirfh, name,
+ fhandle, fattr),
+ &exception);
+ } while (exception.retry);
+ return err;
+}
+
static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct rpc_cred *cred;
int status = 0;
- cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
+ cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
if (IS_ERR(cred)) {
status = PTR_ERR(cred);
goto out;
return err;
}
-static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
- struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
- struct nfs_fattr *fattr)
+static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
+ struct page *page, unsigned int len, struct iattr *sattr)
{
struct nfs_server *server = NFS_SERVER(dir);
- struct nfs_fattr dir_fattr;
+ struct nfs_fh fhandle;
+ struct nfs_fattr fattr, dir_fattr;
struct nfs4_create_arg arg = {
.dir_fh = NFS_FH(dir),
.server = server,
- .name = name,
+ .name = &dentry->d_name,
.attrs = sattr,
.ftype = NF4LNK,
.bitmask = server->attr_bitmask,
};
struct nfs4_create_res res = {
.server = server,
- .fh = fhandle,
- .fattr = fattr,
+ .fh = &fhandle,
+ .fattr = &fattr,
.dir_fattr = &dir_fattr,
};
struct rpc_message msg = {
};
int status;
- if (path->len > NFS4_MAXPATHLEN)
+ if (len > NFS4_MAXPATHLEN)
return -ENAMETOOLONG;
- arg.u.symlink = path;
- nfs_fattr_init(fattr);
+
+ arg.u.symlink.pages = &page;
+ arg.u.symlink.len = len;
+ nfs_fattr_init(&fattr);
nfs_fattr_init(&dir_fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
- if (!status)
+ if (!status) {
update_changeattr(dir, &res.dir_cinfo);
- nfs_post_op_update_inode(dir, res.dir_fattr);
+ nfs_post_op_update_inode(dir, res.dir_fattr);
+ status = nfs_instantiate(dentry, &fhandle, &fattr);
+ }
return status;
}
-static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
- struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
- struct nfs_fattr *fattr)
+static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
+ struct page *page, unsigned int len, struct iattr *sattr)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dir),
- _nfs4_proc_symlink(dir, name, path, sattr,
- fhandle, fattr),
+ _nfs4_proc_symlink(dir, dentry, page,
+ len, sattr),
&exception);
} while (exception.retry);
return err;
*/
static void nfs4_renew_done(struct rpc_task *task, void *data)
{
- struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
+ struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
unsigned long timestamp = (unsigned long)data;
if (task->tk_status < 0) {
.rpc_call_done = nfs4_renew_done,
};
-int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred)
+int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
&nfs4_renew_ops, (void *)jiffies);
}
-int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred)
+int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
return -EOPNOTSUPP;
nfs_inode_return_delegation(inode);
buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
- ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
+ ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
if (ret == 0)
nfs4_write_cached_acl(inode, buf, buflen);
return ret;
static int
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
if (!clp || task->tk_status >= 0)
return 0;
return 0;
}
-static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
+static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
{
sigset_t oldset;
int res;
*/
int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
int ret = errorcode;
exception->retry = 0;
if (ret == 0)
exception->retry = 1;
break;
+ case -NFS4ERR_FILE_OPEN:
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
ret = nfs4_delay(server->client, &exception->timeout);
return nfs4_map_errors(ret);
}
-int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
+int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
{
nfs4_verifier sc_verifier;
struct nfs4_setclientid setclientid = {
for(;;) {
setclientid.sc_name_len = scnprintf(setclientid.sc_name,
sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
- clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
+ clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
cred->cr_ops->cr_name,
clp->cl_id_uniquifier);
setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
return status;
}
-static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
+static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
{
struct nfs_fsinfo fsinfo;
struct rpc_message msg = {
return status;
}
-int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
+int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
{
long timeout;
int err;
switch (err) {
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
- nfs4_schedule_state_recovery(server->nfs4_state);
+ nfs4_schedule_state_recovery(server->nfs_client);
case 0:
return 0;
}
{
struct inode *inode = state->inode;
struct nfs_server *server = NFS_SERVER(inode);
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs_lockt_args arg = {
.fh = NFS_FH(inode),
.fl = request,
break;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
- nfs4_schedule_state_recovery(calldata->server->nfs4_state);
+ nfs4_schedule_state_recovery(calldata->server->nfs_client);
break;
default:
if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
if (p->arg.lock_seqid == NULL)
goto out_free;
p->arg.lock_stateid = &lsp->ls_stateid;
- p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
+ p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
p->arg.lock_owner.id = lsp->ls_id;
p->lsp = lsp;
atomic_inc(&lsp->ls_count);
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
- struct nfs4_client *clp = state->owner->so_client;
+ struct nfs_client *clp = state->owner->so_client;
unsigned char fl_flags = request->fl_flags;
int status;
.listxattr = nfs4_listxattr,
};
-struct nfs_rpc_ops nfs_v4_clientops = {
+const struct nfs_rpc_ops nfs_v4_clientops = {
.version = 4, /* protocol version */
.dentry_ops = &nfs4_dentry_operations,
.dir_inode_ops = &nfs4_dir_inode_operations,
.getroot = nfs4_proc_get_root,
.getattr = nfs4_proc_getattr,
.setattr = nfs4_proc_setattr,
+ .lookupfh = nfs4_proc_lookupfh,
.lookup = nfs4_proc_lookup,
.access = nfs4_proc_access,
.readlink = nfs4_proc_readlink,
.statfs = nfs4_proc_statfs,
.fsinfo = nfs4_proc_fsinfo,
.pathconf = nfs4_proc_pathconf,
+ .set_capabilities = nfs4_server_capabilities,
.decode_dirent = nfs4_decode_dirent,
.read_setup = nfs4_proc_read_setup,
.read_done = nfs4_read_done,
void
nfs4_renew_state(void *data)
{
- struct nfs4_client *clp = (struct nfs4_client *)data;
+ struct nfs_client *clp = (struct nfs_client *)data;
struct rpc_cred *cred;
long lease, timeout;
unsigned long last, now;
/* Must be called with clp->cl_sem locked for writes */
void
-nfs4_schedule_state_renewal(struct nfs4_client *clp)
+nfs4_schedule_state_renewal(struct nfs_client *clp)
{
long timeout;
__FUNCTION__, (timeout + HZ - 1) / HZ);
cancel_delayed_work(&clp->cl_renewd);
schedule_delayed_work(&clp->cl_renewd, timeout);
+ set_bit(NFS_CS_RENEWD, &clp->cl_res_state);
spin_unlock(&clp->cl_lock);
}
void
nfs4_renewd_prepare_shutdown(struct nfs_server *server)
{
- struct nfs4_client *clp = server->nfs4_state;
-
- if (!clp)
- return;
flush_scheduled_work();
- down_write(&clp->cl_sem);
- if (!list_empty(&server->nfs4_siblings))
- list_del_init(&server->nfs4_siblings);
- up_write(&clp->cl_sem);
}
-/* Must be called with clp->cl_sem locked for writes */
void
-nfs4_kill_renewd(struct nfs4_client *clp)
+nfs4_kill_renewd(struct nfs_client *clp)
{
down_read(&clp->cl_sem);
- if (!list_empty(&clp->cl_superblocks)) {
- up_read(&clp->cl_sem);
- return;
- }
cancel_delayed_work(&clp->cl_renewd);
up_read(&clp->cl_sem);
flush_scheduled_work();
#include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
+#include "internal.h"
#define OPENOWNER_POOL_SIZE 8
const nfs4_stateid zero_stateid;
-static DEFINE_SPINLOCK(state_spinlock);
static LIST_HEAD(nfs4_clientid_list);
-void
-init_nfsv4_state(struct nfs_server *server)
-{
- server->nfs4_state = NULL;
- INIT_LIST_HEAD(&server->nfs4_siblings);
-}
-
-void
-destroy_nfsv4_state(struct nfs_server *server)
-{
- kfree(server->mnt_path);
- server->mnt_path = NULL;
- if (server->nfs4_state) {
- nfs4_put_client(server->nfs4_state);
- server->nfs4_state = NULL;
- }
-}
-
-/*
- * nfs4_get_client(): returns an empty client structure
- * nfs4_put_client(): drops reference to client structure
- *
- * Since these are allocated/deallocated very rarely, we don't
- * bother putting them in a slab cache...
- */
-static struct nfs4_client *
-nfs4_alloc_client(struct in_addr *addr)
-{
- struct nfs4_client *clp;
-
- if (nfs_callback_up() < 0)
- return NULL;
- if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) {
- nfs_callback_down();
- return NULL;
- }
- memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr));
- init_rwsem(&clp->cl_sem);
- INIT_LIST_HEAD(&clp->cl_delegations);
- INIT_LIST_HEAD(&clp->cl_state_owners);
- INIT_LIST_HEAD(&clp->cl_unused);
- spin_lock_init(&clp->cl_lock);
- atomic_set(&clp->cl_count, 1);
- INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp);
- INIT_LIST_HEAD(&clp->cl_superblocks);
- rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS4 client");
- clp->cl_rpcclient = ERR_PTR(-EINVAL);
- clp->cl_boot_time = CURRENT_TIME;
- clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
- return clp;
-}
-
-static void
-nfs4_free_client(struct nfs4_client *clp)
-{
- struct nfs4_state_owner *sp;
-
- while (!list_empty(&clp->cl_unused)) {
- sp = list_entry(clp->cl_unused.next,
- struct nfs4_state_owner,
- so_list);
- list_del(&sp->so_list);
- kfree(sp);
- }
- BUG_ON(!list_empty(&clp->cl_state_owners));
- nfs_idmap_delete(clp);
- if (!IS_ERR(clp->cl_rpcclient))
- rpc_shutdown_client(clp->cl_rpcclient);
- kfree(clp);
- nfs_callback_down();
-}
-
-static struct nfs4_client *__nfs4_find_client(struct in_addr *addr)
-{
- struct nfs4_client *clp;
- list_for_each_entry(clp, &nfs4_clientid_list, cl_servers) {
- if (memcmp(&clp->cl_addr, addr, sizeof(clp->cl_addr)) == 0) {
- atomic_inc(&clp->cl_count);
- return clp;
- }
- }
- return NULL;
-}
-
-struct nfs4_client *nfs4_find_client(struct in_addr *addr)
-{
- struct nfs4_client *clp;
- spin_lock(&state_spinlock);
- clp = __nfs4_find_client(addr);
- spin_unlock(&state_spinlock);
- return clp;
-}
-
-struct nfs4_client *
-nfs4_get_client(struct in_addr *addr)
-{
- struct nfs4_client *clp, *new = NULL;
-
- spin_lock(&state_spinlock);
- for (;;) {
- clp = __nfs4_find_client(addr);
- if (clp != NULL)
- break;
- clp = new;
- if (clp != NULL) {
- list_add(&clp->cl_servers, &nfs4_clientid_list);
- new = NULL;
- break;
- }
- spin_unlock(&state_spinlock);
- new = nfs4_alloc_client(addr);
- spin_lock(&state_spinlock);
- if (new == NULL)
- break;
- }
- spin_unlock(&state_spinlock);
- if (new)
- nfs4_free_client(new);
- return clp;
-}
-
-void
-nfs4_put_client(struct nfs4_client *clp)
-{
- if (!atomic_dec_and_lock(&clp->cl_count, &state_spinlock))
- return;
- list_del(&clp->cl_servers);
- spin_unlock(&state_spinlock);
- BUG_ON(!list_empty(&clp->cl_superblocks));
- rpc_wake_up(&clp->cl_rpcwaitq);
- nfs4_kill_renewd(clp);
- nfs4_free_client(clp);
-}
-
-static int nfs4_init_client(struct nfs4_client *clp, struct rpc_cred *cred)
+static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
{
int status = nfs4_proc_setclientid(clp, NFS4_CALLBACK,
nfs_callback_tcpport, cred);
}
u32
-nfs4_alloc_lockowner_id(struct nfs4_client *clp)
+nfs4_alloc_lockowner_id(struct nfs_client *clp)
{
return clp->cl_lockowner_id ++;
}
static struct nfs4_state_owner *
-nfs4_client_grab_unused(struct nfs4_client *clp, struct rpc_cred *cred)
+nfs4_client_grab_unused(struct nfs_client *clp, struct rpc_cred *cred)
{
struct nfs4_state_owner *sp = NULL;
return sp;
}
-struct rpc_cred *nfs4_get_renew_cred(struct nfs4_client *clp)
+struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
struct rpc_cred *cred = NULL;
return cred;
}
-struct rpc_cred *nfs4_get_setclientid_cred(struct nfs4_client *clp)
+struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
}
static struct nfs4_state_owner *
-nfs4_find_state_owner(struct nfs4_client *clp, struct rpc_cred *cred)
+nfs4_find_state_owner(struct nfs_client *clp, struct rpc_cred *cred)
{
struct nfs4_state_owner *sp, *res = NULL;
void
nfs4_drop_state_owner(struct nfs4_state_owner *sp)
{
- struct nfs4_client *clp = sp->so_client;
+ struct nfs_client *clp = sp->so_client;
spin_lock(&clp->cl_lock);
list_del_init(&sp->so_list);
spin_unlock(&clp->cl_lock);
*/
struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs4_state_owner *sp, *new;
get_rpccred(cred);
*/
void nfs4_put_state_owner(struct nfs4_state_owner *sp)
{
- struct nfs4_client *clp = sp->so_client;
+ struct nfs_client *clp = sp->so_client;
struct rpc_cred *cred = sp->so_cred;
if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock))
static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
{
struct nfs4_lock_state *lsp;
- struct nfs4_client *clp = state->owner->so_client;
+ struct nfs_client *clp = state->owner->so_client;
lsp = kzalloc(sizeof(*lsp), GFP_KERNEL);
if (lsp == NULL)
static int reclaimer(void *);
-static inline void nfs4_clear_recover_bit(struct nfs4_client *clp)
+static inline void nfs4_clear_recover_bit(struct nfs_client *clp)
{
smp_mb__before_clear_bit();
clear_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state);
/*
* State recovery routine
*/
-static void nfs4_recover_state(struct nfs4_client *clp)
+static void nfs4_recover_state(struct nfs_client *clp)
{
struct task_struct *task;
__module_get(THIS_MODULE);
atomic_inc(&clp->cl_count);
task = kthread_run(reclaimer, clp, "%u.%u.%u.%u-reclaim",
- NIPQUAD(clp->cl_addr));
+ NIPQUAD(clp->cl_addr.sin_addr));
if (!IS_ERR(task))
return;
nfs4_clear_recover_bit(clp);
- nfs4_put_client(clp);
+ nfs_put_client(clp);
module_put(THIS_MODULE);
}
/*
* Schedule a state recovery attempt
*/
-void nfs4_schedule_state_recovery(struct nfs4_client *clp)
+void nfs4_schedule_state_recovery(struct nfs_client *clp)
{
if (!clp)
return;
return status;
}
-static void nfs4_state_mark_reclaim(struct nfs4_client *clp)
+static void nfs4_state_mark_reclaim(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
struct nfs4_state *state;
static int reclaimer(void *ptr)
{
- struct nfs4_client *clp = ptr;
+ struct nfs_client *clp = ptr;
struct nfs4_state_owner *sp;
struct nfs4_state_recovery_ops *ops;
struct rpc_cred *cred;
if (status == -NFS4ERR_CB_PATH_DOWN)
nfs_handle_cb_pathdown(clp);
nfs4_clear_recover_bit(clp);
- nfs4_put_client(clp);
+ nfs_put_client(clp);
module_put_and_exit(0);
return 0;
out_error:
printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %u.%u.%u.%u with error %d\n",
- NIPQUAD(clp->cl_addr.s_addr), -status);
+ NIPQUAD(clp->cl_addr.sin_addr), -status);
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
goto out;
}
/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO EIO
-static int nfs_stat_to_errno(int);
+static int nfs4_stat_to_errno(int);
/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
#ifdef DEBUG
#define decode_link_maxsz (op_decode_hdr_maxsz + 5)
#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
1 + nfs4_name_maxsz + \
- nfs4_path_maxsz + \
+ 1 + \
nfs4_fattr_maxsz)
#define decode_symlink_maxsz (op_decode_hdr_maxsz + 8)
#define encode_create_maxsz (op_encode_hdr_maxsz + \
if (iap->ia_valid & ATTR_MODE)
len += 4;
if (iap->ia_valid & ATTR_UID) {
- owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
+ owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
if (owner_namelen < 0) {
printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
iap->ia_uid);
len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
}
if (iap->ia_valid & ATTR_GID) {
- owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
+ owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
if (owner_grouplen < 0) {
printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
iap->ia_gid);
switch (create->ftype) {
case NF4LNK:
- RESERVE_SPACE(4 + create->u.symlink->len);
- WRITE32(create->u.symlink->len);
- WRITEMEM(create->u.symlink->name, create->u.symlink->len);
+ RESERVE_SPACE(4);
+ WRITE32(create->u.symlink.len);
+ xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
break;
case NF4BLK: case NF4CHR:
return 0;
}
-static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
+static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
{
uint32_t *p;
return 0;
}
-static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
+static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
{
uint32_t *p;
/*
* a RENEW request
*/
-static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
+static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs_client *clp)
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
/*
* a SETCLIENTID_CONFIRM request
*/
-static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
+static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_client *clp)
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
}
READ32(nfserr);
if (nfserr != NFS_OK)
- return -nfs_stat_to_errno(nfserr);
+ return -nfs4_stat_to_errno(nfserr);
return 0;
}
/* Dummy routine */
-static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
+static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
{
uint32_t *p;
unsigned int strlen;
return 0;
}
-static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
+static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *uid)
{
uint32_t len, *p;
return 0;
}
-static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
+static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *gid)
{
uint32_t len, *p;
fattr->mode |= fmode;
if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
goto xdr_error;
- if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
+ if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
goto xdr_error;
- if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
+ if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
goto xdr_error;
if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
goto xdr_error;
if (decode_space_limit(xdr, &res->maxsize) < 0)
return -EIO;
}
- return decode_ace(xdr, NULL, res->server->nfs4_state);
+ return decode_ace(xdr, NULL, res->server->nfs_client);
}
static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
return 0;
}
-static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
+static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
{
uint32_t *p;
uint32_t opnum;
READ_BUF(len);
return -NFSERR_CLID_INUSE;
} else
- return -nfs_stat_to_errno(nfserr);
+ return -nfs4_stat_to_errno(nfserr);
return 0;
}
if (!status)
status = decode_fsinfo(&xdr, fsinfo);
if (!status)
- status = -nfs_stat_to_errno(hdr.status);
+ status = -nfs4_stat_to_errno(hdr.status);
return status;
}
* a SETCLIENTID request
*/
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
- struct nfs4_client *clp)
+ struct nfs_client *clp)
{
struct xdr_stream xdr;
struct compound_hdr hdr;
if (!status)
status = decode_setclientid(&xdr, clp);
if (!status)
- status = -nfs_stat_to_errno(hdr.status);
+ status = -nfs4_stat_to_errno(hdr.status);
return status;
}
if (!status)
status = decode_fsinfo(&xdr, fsinfo);
if (!status)
- status = -nfs_stat_to_errno(hdr.status);
+ status = -nfs4_stat_to_errno(hdr.status);
return status;
}
* This one is used jointly by NFSv2 and NFSv3.
*/
static int
-nfs_stat_to_errno(int stat)
+nfs4_stat_to_errno(int stat)
{
int i;
for (i = 0; nfs_errtbl[i].stat != -1; i++) {
dprintk("%s: call getattr\n", __FUNCTION__);
nfs_fattr_init(fattr);
- status = rpc_call_sync(server->client_sys, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
if (status)
return status;
dprintk("%s: call statfs\n", __FUNCTION__);
msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
msg.rpc_resp = &fsinfo;
- status = rpc_call_sync(server->client_sys, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
dprintk("%s: reply statfs: %d\n", __FUNCTION__, status);
if (status)
return status;
}
static int
-nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
- struct iattr *sattr, struct nfs_fh *fhandle,
- struct nfs_fattr *fattr)
+nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
+ unsigned int len, struct iattr *sattr)
{
+ struct nfs_fh fhandle;
+ struct nfs_fattr fattr;
struct nfs_symlinkargs arg = {
.fromfh = NFS_FH(dir),
- .fromname = name->name,
- .fromlen = name->len,
- .topath = path->name,
- .tolen = path->len,
+ .fromname = dentry->d_name.name,
+ .fromlen = dentry->d_name.len,
+ .pages = &page,
+ .pathlen = len,
.sattr = sattr
};
struct rpc_message msg = {
};
int status;
- if (path->len > NFS2_MAXPATHLEN)
+ if (len > NFS2_MAXPATHLEN)
return -ENAMETOOLONG;
- dprintk("NFS call symlink %s -> %s\n", name->name, path->name);
- nfs_fattr_init(fattr);
- fhandle->size = 0;
+
+ dprintk("NFS call symlink %s\n", dentry->d_name.name);
+
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_mark_for_revalidate(dir);
+
+ /*
+ * V2 SYMLINK requests don't return any attributes. Setting the
+ * filehandle size to zero indicates to nfs_instantiate that it
+ * should fill in the data with a LOOKUP call on the wire.
+ */
+ if (status == 0) {
+ nfs_fattr_init(&fattr);
+ fhandle.size = 0;
+ status = nfs_instantiate(dentry, &fhandle, &fattr);
+ }
+
dprintk("NFS reply symlink: %d\n", status);
return status;
}
}
-struct nfs_rpc_ops nfs_v2_clientops = {
+const struct nfs_rpc_ops nfs_v2_clientops = {
.version = 2, /* protocol version */
.dentry_ops = &nfs_dentry_operations,
.dir_inode_ops = &nfs_dir_inode_operations,
rdata->args.offset = page_offset(page) + rdata->args.pgbase;
dprintk("NFS: nfs_proc_read(%s, (%s/%Ld), %Lu, %u)\n",
- NFS_SERVER(inode)->hostname,
+ NFS_SERVER(inode)->nfs_client->cl_hostname,
inode->i_sb->s_id,
(long long)NFS_FILEID(inode),
(unsigned long long)rdata->args.pgbase,
nfs_add_stats(data->inode, NFSIOS_SERVERREADBYTES, resp->count);
- /* Is this a short read? */
- if (task->tk_status >= 0 && resp->count < argp->count && !resp->eof) {
+ if (task->tk_status < 0) {
+ if (task->tk_status == -ESTALE) {
+ set_bit(NFS_INO_STALE, &NFS_FLAGS(data->inode));
+ nfs_mark_for_revalidate(data->inode);
+ }
+ } else if (resp->count < argp->count && !resp->eof) {
+ /* This is a short read! */
nfs_inc_stats(data->inode, NFSIOS_SHORTREAD);
/* Has the server at least made some progress? */
if (resp->count != 0) {
if (error)
goto out_error;
+ error = -ESTALE;
+ if (NFS_STALE(inode))
+ goto out_error;
+
if (file == NULL) {
ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
if (ctx == NULL)
};
struct inode *inode = mapping->host;
struct nfs_server *server = NFS_SERVER(inode);
- int ret;
+ int ret = -ESTALE;
dprintk("NFS: nfs_readpages (%s/%Ld %d)\n",
inode->i_sb->s_id,
nr_pages);
nfs_inc_stats(inode, NFSIOS_VFSREADPAGES);
+ if (NFS_STALE(inode))
+ goto out;
+
if (filp == NULL) {
desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
if (desc.ctx == NULL)
ret = err;
}
put_nfs_open_context(desc.ctx);
+out:
return ret;
}
*
* Split from inode.c by David Howells <dhowells@redhat.com>
*
+ * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a
+ * particular server are held in the same superblock
+ * - NFS superblocks can have several effective roots to the dentry tree
+ * - directory type roots are spliced into the tree when a path from one root reaches the root
+ * of another (see nfs_lookup())
*/
#include <linux/config.h>
#define NFSDBG_FACILITY NFSDBG_VFS
-/* Maximum number of readahead requests
- * FIXME: this should really be a sysctl so that users may tune it to suit
- * their needs. People that do NFS over a slow network, might for
- * instance want to reduce it to something closer to 1 for improved
- * interactive response.
- */
-#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
-
-/*
- * RPC cruft for NFS
- */
-static struct rpc_version * nfs_version[] = {
- NULL,
- NULL,
- &nfs_version2,
-#if defined(CONFIG_NFS_V3)
- &nfs_version3,
-#elif defined(CONFIG_NFS_V4)
- NULL,
-#endif
-#if defined(CONFIG_NFS_V4)
- &nfs_version4,
-#endif
-};
-
-static struct rpc_program nfs_program = {
- .name = "nfs",
- .number = NFS_PROGRAM,
- .nrvers = ARRAY_SIZE(nfs_version),
- .version = nfs_version,
- .stats = &nfs_rpcstat,
- .pipe_dir_name = "/nfs",
-};
-
-struct rpc_stat nfs_rpcstat = {
- .program = &nfs_program
-};
-
-
-#ifdef CONFIG_NFS_V3_ACL
-static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
-static struct rpc_version * nfsacl_version[] = {
- [3] = &nfsacl_version3,
-};
-
-struct rpc_program nfsacl_program = {
- .name = "nfsacl",
- .number = NFS_ACL_PROGRAM,
- .nrvers = ARRAY_SIZE(nfsacl_version),
- .version = nfsacl_version,
- .stats = &nfsacl_rpcstat,
-};
-#endif /* CONFIG_NFS_V3_ACL */
-
static void nfs_umount_begin(struct vfsmount *, int);
static int nfs_statfs(struct dentry *, struct kstatfs *);
static int nfs_show_options(struct seq_file *, struct vfsmount *);
static int nfs_show_stats(struct seq_file *, struct vfsmount *);
static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *);
-static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
+static int nfs_xdev_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
static void nfs_kill_super(struct super_block *);
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type clone_nfs_fs_type = {
+struct file_system_type nfs_xdev_fs_type = {
.owner = THIS_MODULE,
.name = "nfs",
- .get_sb = nfs_clone_nfs_sb,
+ .get_sb = nfs_xdev_get_sb,
.kill_sb = nfs_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
#ifdef CONFIG_NFS_V4
static int nfs4_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
-static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
-static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs4_xdev_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs4_referral_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
static void nfs4_kill_super(struct super_block *sb);
static struct file_system_type nfs4_fs_type = {
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type clone_nfs4_fs_type = {
+struct file_system_type nfs4_xdev_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
- .get_sb = nfs_clone_nfs4_sb,
+ .get_sb = nfs4_xdev_get_sb,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type nfs_referral_nfs4_fs_type = {
+struct file_system_type nfs4_referral_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
- .get_sb = nfs_referral_nfs4_sb,
+ .get_sb = nfs4_referral_get_sb,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
};
#endif
-#ifdef CONFIG_NFS_V4
-static const int nfs_set_port_min = 0;
-static const int nfs_set_port_max = 65535;
-
-static int param_set_port(const char *val, struct kernel_param *kp)
-{
- char *endp;
- int num = simple_strtol(val, &endp, 0);
- if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
- return -EINVAL;
- *((int *)kp->arg) = num;
- return 0;
-}
-
-module_param_call(callback_tcpport, param_set_port, param_get_int,
- &nfs_callback_set_tcpport, 0644);
-#endif
-
-#ifdef CONFIG_NFS_V4
-static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
-{
- char *endp;
- int num = simple_strtol(val, &endp, 0);
- int jif = num * HZ;
- if (endp == val || *endp || num < 0 || jif < num)
- return -EINVAL;
- *((int *)kp->arg) = jif;
- return 0;
-}
-
-module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
- &nfs_idmap_cache_timeout, 0644);
-#endif
+static struct shrinker *acl_shrinker;
/*
* Register the NFS filesystems
if (ret < 0)
goto error_2;
#endif
+ acl_shrinker = set_shrinker(DEFAULT_SEEKS, nfs_access_cache_shrinker);
return 0;
#ifdef CONFIG_NFS_V4
*/
void __exit unregister_nfs_fs(void)
{
+ if (acl_shrinker != NULL)
+ remove_shrinker(acl_shrinker);
#ifdef CONFIG_NFS_V4
unregister_filesystem(&nfs4_fs_type);
nfs_unregister_sysctl();
*/
static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
- struct super_block *sb = dentry->d_sb;
- struct nfs_server *server = NFS_SB(sb);
+ struct nfs_server *server = NFS_SB(dentry->d_sb);
unsigned char blockbits;
unsigned long blockres;
- struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
+ struct nfs_fh *fh = NFS_FH(dentry->d_inode);
struct nfs_fattr fattr;
struct nfs_fsstat res = {
.fattr = &fattr,
lock_kernel();
- error = server->rpc_ops->statfs(server, rootfh, &res);
+ error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
buf->f_type = NFS_SUPER_MAGIC;
if (error < 0)
goto out_err;
* case where f_frsize != f_bsize. Eventually we want to
* report the value of wtmult in this field.
*/
- buf->f_frsize = sb->s_blocksize;
+ buf->f_frsize = dentry->d_sb->s_blocksize;
/*
* On most *nix systems, f_blocks, f_bfree, and f_bavail
* thus historically Linux's sys_statfs reports these
* fields in units of f_bsize.
*/
- buf->f_bsize = sb->s_blocksize;
- blockbits = sb->s_blocksize_bits;
+ buf->f_bsize = dentry->d_sb->s_blocksize;
+ blockbits = dentry->d_sb->s_blocksize_bits;
blockres = (1 << blockbits) - 1;
buf->f_blocks = (res.tbytes + blockres) >> blockbits;
buf->f_bfree = (res.fbytes + blockres) >> blockbits;
}
+/*
+ * Map the security flavour number to a name
+ */
static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour)
{
- static struct {
+ static const struct {
rpc_authflavor_t flavour;
const char *str;
} sec_flavours[] = {
*/
static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
{
- static struct proc_nfs_info {
+ static const struct proc_nfs_info {
int flag;
- char *str;
- char *nostr;
+ const char *str;
+ const char *nostr;
} nfs_info[] = {
{ NFS_MOUNT_SOFT, ",soft", ",hard" },
{ NFS_MOUNT_INTR, ",intr", "" },
{ NFS_MOUNT_NOACL, ",noacl", "" },
{ 0, NULL, NULL }
};
- struct proc_nfs_info *nfs_infop;
+ const struct proc_nfs_info *nfs_infop;
+ struct nfs_client *clp = nfss->nfs_client;
char buf[12];
- char *proto;
+ const char *proto;
- seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
+ seq_printf(m, ",vers=%d", clp->rpc_ops->version);
seq_printf(m, ",rsize=%d", nfss->rsize);
seq_printf(m, ",wsize=%d", nfss->wsize);
if (nfss->acregmin != 3*HZ || showdefaults)
proto = buf;
}
seq_printf(m, ",proto=%s", proto);
- seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
- seq_printf(m, ",retrans=%u", nfss->retrans_count);
+ seq_printf(m, ",timeo=%lu", 10U * clp->retrans_timeo / HZ);
+ seq_printf(m, ",retrans=%u", clp->retrans_count);
seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor));
}
nfs_show_mount_options(m, nfss, 0);
seq_puts(m, ",addr=");
- seq_escape(m, nfss->hostname, " \t\n\\");
+ seq_escape(m, nfss->nfs_client->cl_hostname, " \t\n\\");
return 0;
}
seq_printf(m, ",namelen=%d", nfss->namelen);
#ifdef CONFIG_NFS_V4
- if (nfss->rpc_ops->version == 4) {
+ if (nfss->nfs_client->cl_nfsversion == 4) {
seq_printf(m, "\n\tnfsv4:\t");
seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
/*
* Begin unmount by attempting to remove all automounted mountpoints we added
- * in response to traversals
+ * in response to xdev traversals and referrals
*/
static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
{
- struct nfs_server *server;
- struct rpc_clnt *rpc;
-
shrink_submounts(vfsmnt, &nfs_automount_list);
- if (!(flags & MNT_FORCE))
- return;
- /* -EIO all pending I/O */
- server = NFS_SB(vfsmnt->mnt_sb);
- rpc = server->client;
- if (!IS_ERR(rpc))
- rpc_killall_tasks(rpc);
- rpc = server->client_acl;
- if (!IS_ERR(rpc))
- rpc_killall_tasks(rpc);
}
/*
- * Obtain the root inode of the file system.
+ * Validate the NFS2/NFS3 mount data
+ * - fills in the mount root filehandle
*/
-static struct inode *
-nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
+static int nfs_validate_mount_data(struct nfs_mount_data *data,
+ struct nfs_fh *mntfh)
{
- struct nfs_server *server = NFS_SB(sb);
- int error;
-
- error = server->rpc_ops->getroot(server, rootfh, fsinfo);
- if (error < 0) {
- dprintk("nfs_get_root: getattr error = %d\n", -error);
- return ERR_PTR(error);
+ if (data == NULL) {
+ dprintk("%s: missing data argument\n", __FUNCTION__);
+ return -EINVAL;
}
- server->fsid = fsinfo->fattr->fsid;
- return nfs_fhget(sb, rootfh, fsinfo->fattr);
-}
-
-/*
- * Do NFS version-independent mount processing, and sanity checking
- */
-static int
-nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
-{
- struct nfs_server *server;
- struct inode *root_inode;
- struct nfs_fattr fattr;
- struct nfs_fsinfo fsinfo = {
- .fattr = &fattr,
- };
- struct nfs_pathconf pathinfo = {
- .fattr = &fattr,
- };
- int no_root_error = 0;
- unsigned long max_rpc_payload;
-
- /* We probably want something more informative here */
- snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
-
- server = NFS_SB(sb);
+ if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
+ dprintk("%s: bad mount version\n", __FUNCTION__);
+ return -EINVAL;
+ }
- sb->s_magic = NFS_SUPER_MAGIC;
+ switch (data->version) {
+ case 1:
+ data->namlen = 0;
+ case 2:
+ data->bsize = 0;
+ case 3:
+ if (data->flags & NFS_MOUNT_VER3) {
+ dprintk("%s: mount structure version %d does not support NFSv3\n",
+ __FUNCTION__,
+ data->version);
+ return -EINVAL;
+ }
+ data->root.size = NFS2_FHSIZE;
+ memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
+ case 4:
+ if (data->flags & NFS_MOUNT_SECFLAVOUR) {
+ dprintk("%s: mount structure version %d does not support strong security\n",
+ __FUNCTION__,
+ data->version);
+ return -EINVAL;
+ }
+ case 5:
+ memset(data->context, 0, sizeof(data->context));
+ }
- server->io_stats = nfs_alloc_iostats();
- if (server->io_stats == NULL)
- return -ENOMEM;
+ /* Set the pseudoflavor */
+ if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
+ data->pseudoflavor = RPC_AUTH_UNIX;
- root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
- /* Did getting the root inode fail? */
- if (IS_ERR(root_inode)) {
- no_root_error = PTR_ERR(root_inode);
- goto out_no_root;
- }
- sb->s_root = d_alloc_root(root_inode);
- if (!sb->s_root) {
- no_root_error = -ENOMEM;
- goto out_no_root;
+#ifndef CONFIG_NFS_V3
+ /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
+ if (data->flags & NFS_MOUNT_VER3) {
+ dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
+ return -EPROTONOSUPPORT;
}
- sb->s_root->d_op = server->rpc_ops->dentry_ops;
-
- /* mount time stamp, in seconds */
- server->mount_time = jiffies;
-
- /* Get some general file system info */
- if (server->namelen == 0 &&
- server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
- server->namelen = pathinfo.max_namelen;
- /* Work out a lot of parameters */
- if (server->rsize == 0)
- server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
- if (server->wsize == 0)
- server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
-
- if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
- server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
- if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
- server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
-
- max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
- if (server->rsize > max_rpc_payload)
- server->rsize = max_rpc_payload;
- if (server->rsize > NFS_MAX_FILE_IO_SIZE)
- server->rsize = NFS_MAX_FILE_IO_SIZE;
- server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
- if (server->wsize > max_rpc_payload)
- server->wsize = max_rpc_payload;
- if (server->wsize > NFS_MAX_FILE_IO_SIZE)
- server->wsize = NFS_MAX_FILE_IO_SIZE;
- server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+#endif /* CONFIG_NFS_V3 */
- if (sb->s_blocksize == 0)
- sb->s_blocksize = nfs_block_bits(server->wsize,
- &sb->s_blocksize_bits);
- server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
-
- server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
- if (server->dtsize > PAGE_CACHE_SIZE)
- server->dtsize = PAGE_CACHE_SIZE;
- if (server->dtsize > server->rsize)
- server->dtsize = server->rsize;
-
- if (server->flags & NFS_MOUNT_NOAC) {
- server->acregmin = server->acregmax = 0;
- server->acdirmin = server->acdirmax = 0;
- sb->s_flags |= MS_SYNCHRONOUS;
+ /* We now require that the mount process passes the remote address */
+ if (data->addr.sin_addr.s_addr == INADDR_ANY) {
+ dprintk("%s: mount program didn't pass remote address!\n",
+ __FUNCTION__);
+ return -EINVAL;
}
- server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
- nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
+ /* Prepare the root filehandle */
+ if (data->flags & NFS_MOUNT_VER3)
+ mntfh->size = data->root.size;
+ else
+ mntfh->size = NFS2_FHSIZE;
+
+ if (mntfh->size > sizeof(mntfh->data)) {
+ dprintk("%s: invalid root filehandle\n", __FUNCTION__);
+ return -EINVAL;
+ }
- server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
- server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
+ memcpy(mntfh->data, data->root.data, mntfh->size);
+ if (mntfh->size < sizeof(mntfh->data))
+ memset(mntfh->data + mntfh->size, 0,
+ sizeof(mntfh->data) - mntfh->size);
- /* We're airborne Set socket buffersize */
- rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
return 0;
- /* Yargs. It didn't work out. */
-out_no_root:
- dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
- if (!IS_ERR(root_inode))
- iput(root_inode);
- return no_root_error;
}
/*
- * Initialise the timeout values for a connection
+ * Initialise the common bits of the superblock
*/
-static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
+static inline void nfs_initialise_sb(struct super_block *sb)
{
- to->to_initval = timeo * HZ / 10;
- to->to_retries = retrans;
- if (!to->to_retries)
- to->to_retries = 2;
-
- switch (proto) {
- case IPPROTO_TCP:
- if (!to->to_initval)
- to->to_initval = 60 * HZ;
- if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
- to->to_initval = NFS_MAX_TCP_TIMEOUT;
- to->to_increment = to->to_initval;
- to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
- to->to_exponential = 0;
- break;
- case IPPROTO_UDP:
- default:
- if (!to->to_initval)
- to->to_initval = 11 * HZ / 10;
- if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
- to->to_initval = NFS_MAX_UDP_TIMEOUT;
- to->to_maxval = NFS_MAX_UDP_TIMEOUT;
- to->to_exponential = 1;
- break;
- }
-}
+ struct nfs_server *server = NFS_SB(sb);
-/*
- * Create an RPC client handle.
- */
-static struct rpc_clnt *
-nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
-{
- struct rpc_timeout timeparms;
- struct rpc_xprt *xprt = NULL;
- struct rpc_clnt *clnt = NULL;
- int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
-
- nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
-
- server->retrans_timeo = timeparms.to_initval;
- server->retrans_count = timeparms.to_retries;
-
- /* create transport and client */
- xprt = xprt_create_proto(proto, &server->addr, &timeparms);
- if (IS_ERR(xprt)) {
- dprintk("%s: cannot create RPC transport. Error = %ld\n",
- __FUNCTION__, PTR_ERR(xprt));
- return (struct rpc_clnt *)xprt;
- }
- clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
- server->rpc_ops->version, data->pseudoflavor);
- if (IS_ERR(clnt)) {
- dprintk("%s: cannot create RPC client. Error = %ld\n",
- __FUNCTION__, PTR_ERR(xprt));
- goto out_fail;
- }
+ sb->s_magic = NFS_SUPER_MAGIC;
- clnt->cl_intr = 1;
- clnt->cl_softrtry = 1;
+ /* We probably want something more informative here */
+ snprintf(sb->s_id, sizeof(sb->s_id),
+ "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
+
+ if (sb->s_blocksize == 0)
+ sb->s_blocksize = nfs_block_bits(server->wsize,
+ &sb->s_blocksize_bits);
- return clnt;
+ if (server->flags & NFS_MOUNT_NOAC)
+ sb->s_flags |= MS_SYNCHRONOUS;
-out_fail:
- return clnt;
+ nfs_super_set_maxbytes(sb, server->maxfilesize);
}
/*
- * Clone a server record
+ * Finish setting up an NFS2/3 superblock
*/
-static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data)
+static void nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data)
{
struct nfs_server *server = NFS_SB(sb);
- struct nfs_server *parent = NFS_SB(data->sb);
- struct inode *root_inode;
- struct nfs_fsinfo fsinfo;
- void *err = ERR_PTR(-ENOMEM);
-
- sb->s_op = data->sb->s_op;
- sb->s_blocksize = data->sb->s_blocksize;
- sb->s_blocksize_bits = data->sb->s_blocksize_bits;
- sb->s_maxbytes = data->sb->s_maxbytes;
-
- server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
- server->io_stats = nfs_alloc_iostats();
- if (server->io_stats == NULL)
- goto out;
-
- server->client = rpc_clone_client(parent->client);
- if (IS_ERR((err = server->client)))
- goto out;
-
- if (!IS_ERR(parent->client_sys)) {
- server->client_sys = rpc_clone_client(parent->client_sys);
- if (IS_ERR((err = server->client_sys)))
- goto out;
- }
- if (!IS_ERR(parent->client_acl)) {
- server->client_acl = rpc_clone_client(parent->client_acl);
- if (IS_ERR((err = server->client_acl)))
- goto out;
- }
- root_inode = nfs_fhget(sb, data->fh, data->fattr);
- if (!root_inode)
- goto out;
- sb->s_root = d_alloc_root(root_inode);
- if (!sb->s_root)
- goto out_put_root;
- fsinfo.fattr = data->fattr;
- if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
- nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
- sb->s_root->d_op = server->rpc_ops->dentry_ops;
- sb->s_flags |= MS_ACTIVE;
- return server;
-out_put_root:
- iput(root_inode);
-out:
- return err;
-}
-/*
- * Copy an existing superblock and attach revised data
- */
-static int nfs_clone_generic_sb(struct nfs_clone_mount *data,
- struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *),
- struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *),
- struct vfsmount *mnt)
-{
- struct nfs_server *server;
- struct nfs_server *parent = NFS_SB(data->sb);
- struct super_block *sb = ERR_PTR(-EINVAL);
- char *hostname;
- int error = -ENOMEM;
- int len;
-
- server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (server == NULL)
- goto out_err;
- memcpy(server, parent, sizeof(*server));
- hostname = (data->hostname != NULL) ? data->hostname : parent->hostname;
- len = strlen(hostname) + 1;
- server->hostname = kmalloc(len, GFP_KERNEL);
- if (server->hostname == NULL)
- goto free_server;
- memcpy(server->hostname, hostname, len);
- error = rpciod_up();
- if (error != 0)
- goto free_hostname;
-
- sb = fill_sb(server, data);
- if (IS_ERR(sb)) {
- error = PTR_ERR(sb);
- goto kill_rpciod;
- }
-
- if (sb->s_root)
- goto out_rpciod_down;
+ sb->s_blocksize_bits = 0;
+ sb->s_blocksize = 0;
+ if (data->bsize)
+ sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
- server = fill_server(sb, data);
- if (IS_ERR(server)) {
- error = PTR_ERR(server);
- goto out_deactivate;
+ if (server->flags & NFS_MOUNT_VER3) {
+ /* The VFS shouldn't apply the umask to mode bits. We will do
+ * so ourselves when necessary.
+ */
+ sb->s_flags |= MS_POSIXACL;
+ sb->s_time_gran = 1;
}
- return simple_set_mnt(mnt, sb);
-out_deactivate:
- up_write(&sb->s_umount);
- deactivate_super(sb);
- return error;
-out_rpciod_down:
- rpciod_down();
- kfree(server->hostname);
- kfree(server);
- return simple_set_mnt(mnt, sb);
-kill_rpciod:
- rpciod_down();
-free_hostname:
- kfree(server->hostname);
-free_server:
- kfree(server);
-out_err:
- return error;
+
+ sb->s_op = &nfs_sops;
+ nfs_initialise_sb(sb);
}
/*
- * Set up an NFS2/3 superblock
- *
- * The way this works is that the mount process passes a structure
- * in the data argument which contains the server's IP address
- * and the root file handle obtained from the server's mount
- * daemon. We stash these away in the private superblock fields.
+ * Finish setting up a cloned NFS2/3 superblock
*/
-static int
-nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
+static void nfs_clone_super(struct super_block *sb,
+ const struct super_block *old_sb)
{
- struct nfs_server *server;
- rpc_authflavor_t authflavor;
+ struct nfs_server *server = NFS_SB(sb);
- server = NFS_SB(sb);
- sb->s_blocksize_bits = 0;
- sb->s_blocksize = 0;
- if (data->bsize)
- sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
- if (data->rsize)
- server->rsize = nfs_block_size(data->rsize, NULL);
- if (data->wsize)
- server->wsize = nfs_block_size(data->wsize, NULL);
- server->flags = data->flags & NFS_MOUNT_FLAGMASK;
-
- server->acregmin = data->acregmin*HZ;
- server->acregmax = data->acregmax*HZ;
- server->acdirmin = data->acdirmin*HZ;
- server->acdirmax = data->acdirmax*HZ;
-
- /* Start lockd here, before we might error out */
- if (!(server->flags & NFS_MOUNT_NONLM))
- lockd_up();
-
- server->namelen = data->namlen;
- server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
- if (!server->hostname)
- return -ENOMEM;
- strcpy(server->hostname, data->hostname);
-
- /* Check NFS protocol revision and initialize RPC op vector
- * and file handle pool. */
-#ifdef CONFIG_NFS_V3
- if (server->flags & NFS_MOUNT_VER3) {
- server->rpc_ops = &nfs_v3_clientops;
- server->caps |= NFS_CAP_READDIRPLUS;
- } else {
- server->rpc_ops = &nfs_v2_clientops;
- }
-#else
- server->rpc_ops = &nfs_v2_clientops;
-#endif
+ sb->s_blocksize_bits = old_sb->s_blocksize_bits;
+ sb->s_blocksize = old_sb->s_blocksize;
+ sb->s_maxbytes = old_sb->s_maxbytes;
- /* Fill in pseudoflavor for mount version < 5 */
- if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
- data->pseudoflavor = RPC_AUTH_UNIX;
- authflavor = data->pseudoflavor; /* save for sb_init() */
- /* XXX maybe we want to add a server->pseudoflavor field */
-
- /* Create RPC client handles */
- server->client = nfs_create_client(server, data);
- if (IS_ERR(server->client))
- return PTR_ERR(server->client);
- /* RFC 2623, sec 2.3.2 */
- if (authflavor != RPC_AUTH_UNIX) {
- struct rpc_auth *auth;
-
- server->client_sys = rpc_clone_client(server->client);
- if (IS_ERR(server->client_sys))
- return PTR_ERR(server->client_sys);
- auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
- if (IS_ERR(auth))
- return PTR_ERR(auth);
- } else {
- atomic_inc(&server->client->cl_count);
- server->client_sys = server->client;
- }
if (server->flags & NFS_MOUNT_VER3) {
-#ifdef CONFIG_NFS_V3_ACL
- if (!(server->flags & NFS_MOUNT_NOACL)) {
- server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
- /* No errors! Assume that Sun nfsacls are supported */
- if (!IS_ERR(server->client_acl))
- server->caps |= NFS_CAP_ACLS;
- }
-#else
- server->flags &= ~NFS_MOUNT_NOACL;
-#endif /* CONFIG_NFS_V3_ACL */
- /*
- * The VFS shouldn't apply the umask to mode bits. We will
- * do so ourselves when necessary.
+ /* The VFS shouldn't apply the umask to mode bits. We will do
+ * so ourselves when necessary.
*/
sb->s_flags |= MS_POSIXACL;
- if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
- server->namelen = NFS3_MAXNAMLEN;
sb->s_time_gran = 1;
- } else {
- if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
- server->namelen = NFS2_MAXNAMLEN;
}
- sb->s_op = &nfs_sops;
- return nfs_sb_init(sb, authflavor);
+ sb->s_op = old_sb->s_op;
+ nfs_initialise_sb(sb);
}
-static int nfs_set_super(struct super_block *s, void *data)
+static int nfs_set_super(struct super_block *s, void *_server)
{
- s->s_fs_info = data;
- return set_anon_super(s, data);
+ struct nfs_server *server = _server;
+ int ret;
+
+ s->s_fs_info = server;
+ ret = set_anon_super(s, server);
+ if (ret == 0)
+ server->s_dev = s->s_dev;
+ return ret;
}
static int nfs_compare_super(struct super_block *sb, void *data)
{
- struct nfs_server *server = data;
- struct nfs_server *old = NFS_SB(sb);
+ struct nfs_server *server = data, *old = NFS_SB(sb);
- if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
+ if (old->nfs_client != server->nfs_client)
return 0;
- if (old->addr.sin_port != server->addr.sin_port)
+ if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0)
return 0;
- return !nfs_compare_fh(&old->fh, &server->fh);
+ return 1;
}
static int nfs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
- int error;
struct nfs_server *server = NULL;
struct super_block *s;
- struct nfs_fh *root;
+ struct nfs_fh mntfh;
struct nfs_mount_data *data = raw_data;
+ struct dentry *mntroot;
+ int error;
- error = -EINVAL;
- if (data == NULL) {
- dprintk("%s: missing data argument\n", __FUNCTION__);
- goto out_err_noserver;
- }
- if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
- dprintk("%s: bad mount version\n", __FUNCTION__);
- goto out_err_noserver;
- }
- switch (data->version) {
- case 1:
- data->namlen = 0;
- case 2:
- data->bsize = 0;
- case 3:
- if (data->flags & NFS_MOUNT_VER3) {
- dprintk("%s: mount structure version %d does not support NFSv3\n",
- __FUNCTION__,
- data->version);
- goto out_err_noserver;
- }
- data->root.size = NFS2_FHSIZE;
- memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
- case 4:
- if (data->flags & NFS_MOUNT_SECFLAVOUR) {
- dprintk("%s: mount structure version %d does not support strong security\n",
- __FUNCTION__,
- data->version);
- goto out_err_noserver;
- }
- case 5:
- memset(data->context, 0, sizeof(data->context));
- }
-#ifndef CONFIG_NFS_V3
- /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
- error = -EPROTONOSUPPORT;
- if (data->flags & NFS_MOUNT_VER3) {
- dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
- goto out_err_noserver;
- }
-#endif /* CONFIG_NFS_V3 */
+ /* Validate the mount data */
+ error = nfs_validate_mount_data(data, &mntfh);
+ if (error < 0)
+ return error;
- error = -ENOMEM;
- server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (!server)
+ /* Get a volume representation */
+ server = nfs_create_server(data, &mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
goto out_err_noserver;
- /* Zero out the NFS state stuff */
- init_nfsv4_state(server);
- server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
-
- root = &server->fh;
- if (data->flags & NFS_MOUNT_VER3)
- root->size = data->root.size;
- else
- root->size = NFS2_FHSIZE;
- error = -EINVAL;
- if (root->size > sizeof(root->data)) {
- dprintk("%s: invalid root filehandle\n", __FUNCTION__);
- goto out_err;
- }
- memcpy(root->data, data->root.data, root->size);
-
- /* We now require that the mount process passes the remote address */
- memcpy(&server->addr, &data->addr, sizeof(server->addr));
- if (server->addr.sin_addr.s_addr == INADDR_ANY) {
- dprintk("%s: mount program didn't pass remote address!\n",
- __FUNCTION__);
- goto out_err;
- }
-
- /* Fire up rpciod if not yet running */
- error = rpciod_up();
- if (error < 0) {
- dprintk("%s: couldn't start rpciod! Error = %d\n",
- __FUNCTION__, error);
- goto out_err;
}
+ /* Get a superblock - note that we may end up sharing one that already exists */
s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
- goto out_err_rpciod;
+ goto out_err_nosb;
}
- if (s->s_root)
- goto out_rpciod_down;
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
+ }
- s->s_flags = flags;
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs_fill_super(s, data);
+ }
- error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
+ mntroot = nfs_get_root(s, &mntfh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
}
- s->s_flags |= MS_ACTIVE;
- return simple_set_mnt(mnt, s);
-out_rpciod_down:
- rpciod_down();
- kfree(server);
- return simple_set_mnt(mnt, s);
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
+ return 0;
-out_err_rpciod:
- rpciod_down();
-out_err:
- kfree(server);
+out_err_nosb:
+ nfs_free_server(server);
out_err_noserver:
return error;
+
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ return error;
}
+/*
+ * Destroy an NFS2/3 superblock
+ */
static void nfs_kill_super(struct super_block *s)
{
struct nfs_server *server = NFS_SB(s);
kill_anon_super(s);
-
- if (!IS_ERR(server->client))
- rpc_shutdown_client(server->client);
- if (!IS_ERR(server->client_sys))
- rpc_shutdown_client(server->client_sys);
- if (!IS_ERR(server->client_acl))
- rpc_shutdown_client(server->client_acl);
-
- if (!(server->flags & NFS_MOUNT_NONLM))
- lockd_down(); /* release rpc.lockd */
-
- rpciod_down(); /* release rpciod */
-
- nfs_free_iostats(server->io_stats);
- kfree(server->hostname);
- kfree(server);
- nfs_release_automount_timer();
-}
-
-static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
-{
- struct super_block *sb;
-
- server->fsid = data->fattr->fsid;
- nfs_copy_fh(&server->fh, data->fh);
- sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
- if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM))
- lockd_up();
- return sb;
+ nfs_free_server(server);
}
-static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+/*
+ * Clone an NFS2/3 server record on xdev traversal (FSID-change)
+ */
+static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
{
struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server, mnt);
-}
+ struct super_block *s;
+ struct nfs_server *server;
+ struct dentry *mntroot;
+ int error;
-#ifdef CONFIG_NFS_V4
-static struct rpc_clnt *nfs4_create_client(struct nfs_server *server,
- struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor)
-{
- struct nfs4_client *clp;
- struct rpc_xprt *xprt = NULL;
- struct rpc_clnt *clnt = NULL;
- int err = -EIO;
-
- clp = nfs4_get_client(&server->addr.sin_addr);
- if (!clp) {
- dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
- return ERR_PTR(err);
- }
+ dprintk("--> nfs_xdev_get_sb()\n");
- /* Now create transport and client */
- down_write(&clp->cl_sem);
- if (IS_ERR(clp->cl_rpcclient)) {
- xprt = xprt_create_proto(proto, &server->addr, timeparms);
- if (IS_ERR(xprt)) {
- up_write(&clp->cl_sem);
- err = PTR_ERR(xprt);
- dprintk("%s: cannot create RPC transport. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
- }
- /* Bind to a reserved port! */
- xprt->resvport = 1;
- clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
- server->rpc_ops->version, flavor);
- if (IS_ERR(clnt)) {
- up_write(&clp->cl_sem);
- err = PTR_ERR(clnt);
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
- }
- clnt->cl_intr = 1;
- clnt->cl_softrtry = 1;
- clp->cl_rpcclient = clnt;
- memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
- nfs_idmap_new(clp);
- }
- list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
- clnt = rpc_clone_client(clp->cl_rpcclient);
- if (!IS_ERR(clnt))
- server->nfs4_state = clp;
- up_write(&clp->cl_sem);
- clp = NULL;
-
- if (IS_ERR(clnt)) {
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- return clnt;
+ /* create a new volume representation */
+ server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
}
- if (server->nfs4_state->cl_idmap == NULL) {
- dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
- return ERR_PTR(-ENOMEM);
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_nosb;
}
- if (clnt->cl_auth->au_flavor != flavor) {
- struct rpc_auth *auth;
-
- auth = rpcauth_create(flavor, clnt);
- if (IS_ERR(auth)) {
- dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
- return (struct rpc_clnt *)auth;
- }
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
}
- return clnt;
-
- out_fail:
- if (clp)
- nfs4_put_client(clp);
- return ERR_PTR(err);
-}
-
-/*
- * Set up an NFS4 superblock
- */
-static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
-{
- struct nfs_server *server;
- struct rpc_timeout timeparms;
- rpc_authflavor_t authflavour;
- int err = -EIO;
- sb->s_blocksize_bits = 0;
- sb->s_blocksize = 0;
- server = NFS_SB(sb);
- if (data->rsize != 0)
- server->rsize = nfs_block_size(data->rsize, NULL);
- if (data->wsize != 0)
- server->wsize = nfs_block_size(data->wsize, NULL);
- server->flags = data->flags & NFS_MOUNT_FLAGMASK;
- server->caps = NFS_CAP_ATOMIC_OPEN;
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs_clone_super(s, data->sb);
+ }
- server->acregmin = data->acregmin*HZ;
- server->acregmax = data->acregmax*HZ;
- server->acdirmin = data->acdirmin*HZ;
- server->acdirmax = data->acdirmax*HZ;
+ mntroot = nfs_get_root(s, data->fh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
+ }
- server->rpc_ops = &nfs_v4_clientops;
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
- nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
+ dprintk("<-- nfs_xdev_get_sb() = 0\n");
+ return 0;
- server->retrans_timeo = timeparms.to_initval;
- server->retrans_count = timeparms.to_retries;
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ return error;
- /* Now create transport and client */
- authflavour = RPC_AUTH_UNIX;
- if (data->auth_flavourlen != 0) {
- if (data->auth_flavourlen != 1) {
- dprintk("%s: Invalid number of RPC auth flavours %d.\n",
- __FUNCTION__, data->auth_flavourlen);
- err = -EINVAL;
- goto out_fail;
- }
- if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
- err = -EFAULT;
- goto out_fail;
- }
- }
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ return error;
+}
- server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour);
- if (IS_ERR(server->client)) {
- err = PTR_ERR(server->client);
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
- }
+#ifdef CONFIG_NFS_V4
+/*
+ * Finish setting up a cloned NFS4 superblock
+ */
+static void nfs4_clone_super(struct super_block *sb,
+ const struct super_block *old_sb)
+{
+ sb->s_blocksize_bits = old_sb->s_blocksize_bits;
+ sb->s_blocksize = old_sb->s_blocksize;
+ sb->s_maxbytes = old_sb->s_maxbytes;
sb->s_time_gran = 1;
-
- sb->s_op = &nfs4_sops;
- err = nfs_sb_init(sb, authflavour);
-
- out_fail:
- return err;
+ sb->s_op = old_sb->s_op;
+ nfs_initialise_sb(sb);
}
-static int nfs4_compare_super(struct super_block *sb, void *data)
+/*
+ * Set up an NFS4 superblock
+ */
+static void nfs4_fill_super(struct super_block *sb)
{
- struct nfs_server *server = data;
- struct nfs_server *old = NFS_SB(sb);
-
- if (strcmp(server->hostname, old->hostname) != 0)
- return 0;
- if (strcmp(server->mnt_path, old->mnt_path) != 0)
- return 0;
- return 1;
+ sb->s_time_gran = 1;
+ sb->s_op = &nfs4_sops;
+ nfs_initialise_sb(sb);
}
-static void *
-nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
+static void *nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
{
void *p = NULL;
return dst;
}
+/*
+ * Get the superblock for an NFS4 mountpoint
+ */
static int nfs4_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
- int error;
- struct nfs_server *server;
- struct super_block *s;
struct nfs4_mount_data *data = raw_data;
+ struct super_block *s;
+ struct nfs_server *server;
+ struct sockaddr_in addr;
+ rpc_authflavor_t authflavour;
+ struct nfs_fh mntfh;
+ struct dentry *mntroot;
+ char *mntpath = NULL, *hostname = NULL, ip_addr[16];
void *p;
+ int error;
if (data == NULL) {
dprintk("%s: missing data argument\n", __FUNCTION__);
return -EINVAL;
}
- server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (!server)
- return -ENOMEM;
- /* Zero out the NFS state stuff */
- init_nfsv4_state(server);
- server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
+ /* We now require that the mount process passes the remote address */
+ if (data->host_addrlen != sizeof(addr))
+ return -EINVAL;
+
+ if (copy_from_user(&addr, data->host_addr, sizeof(addr)))
+ return -EFAULT;
+
+ if (addr.sin_family != AF_INET ||
+ addr.sin_addr.s_addr == INADDR_ANY
+ ) {
+ dprintk("%s: mount program didn't pass remote IP address!\n",
+ __FUNCTION__);
+ return -EINVAL;
+ }
+ /* RFC3530: The default port for NFS is 2049 */
+ if (addr.sin_port == 0)
+ addr.sin_port = NFS_PORT;
+
+ /* Grab the authentication type */
+ authflavour = RPC_AUTH_UNIX;
+ if (data->auth_flavourlen != 0) {
+ if (data->auth_flavourlen != 1) {
+ dprintk("%s: Invalid number of RPC auth flavours %d.\n",
+ __FUNCTION__, data->auth_flavourlen);
+ error = -EINVAL;
+ goto out_err_noserver;
+ }
+
+ if (copy_from_user(&authflavour, data->auth_flavours,
+ sizeof(authflavour))) {
+ error = -EFAULT;
+ goto out_err_noserver;
+ }
+ }
p = nfs_copy_user_string(NULL, &data->hostname, 256);
if (IS_ERR(p))
goto out_err;
- server->hostname = p;
+ hostname = p;
p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
if (IS_ERR(p))
goto out_err;
- server->mnt_path = p;
+ mntpath = p;
+
+ dprintk("MNTPATH: %s\n", mntpath);
- p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
- sizeof(server->ip_addr) - 1);
+ p = nfs_copy_user_string(ip_addr, &data->client_addr,
+ sizeof(ip_addr) - 1);
if (IS_ERR(p))
goto out_err;
- /* We now require that the mount process passes the remote address */
- if (data->host_addrlen != sizeof(server->addr)) {
- error = -EINVAL;
- goto out_free;
- }
- if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
- error = -EFAULT;
- goto out_free;
- }
- if (server->addr.sin_family != AF_INET ||
- server->addr.sin_addr.s_addr == INADDR_ANY) {
- dprintk("%s: mount program didn't pass remote IP address!\n",
- __FUNCTION__);
- error = -EINVAL;
- goto out_free;
- }
-
- /* Fire up rpciod if not yet running */
- error = rpciod_up();
- if (error < 0) {
- dprintk("%s: couldn't start rpciod! Error = %d\n",
- __FUNCTION__, error);
- goto out_free;
+ /* Get a volume representation */
+ server = nfs4_create_server(data, hostname, &addr, mntpath, ip_addr,
+ authflavour, &mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
}
- s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
-
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_free;
}
- if (s->s_root) {
- kfree(server->mnt_path);
- kfree(server->hostname);
- kfree(server);
- return simple_set_mnt(mnt, s);
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
}
- s->s_flags = flags;
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs4_fill_super(s);
+ }
- error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
+ mntroot = nfs4_get_root(s, &mntfh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
}
+
s->s_flags |= MS_ACTIVE;
- return simple_set_mnt(mnt, s);
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
+ kfree(mntpath);
+ kfree(hostname);
+ return 0;
+
out_err:
error = PTR_ERR(p);
+ goto out_err_noserver;
+
out_free:
- kfree(server->mnt_path);
- kfree(server->hostname);
- kfree(server);
+ nfs_free_server(server);
+out_err_noserver:
+ kfree(mntpath);
+ kfree(hostname);
return error;
+
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ goto out_err_noserver;
}
static void nfs4_kill_super(struct super_block *sb)
kill_anon_super(sb);
nfs4_renewd_prepare_shutdown(server);
+ nfs_free_server(server);
+}
+
+/*
+ * Clone an NFS4 server record on xdev traversal (FSID-change)
+ */
+static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
+{
+ struct nfs_clone_mount *data = raw_data;
+ struct super_block *s;
+ struct nfs_server *server;
+ struct dentry *mntroot;
+ int error;
+
+ dprintk("--> nfs4_xdev_get_sb()\n");
+
+ /* create a new volume representation */
+ server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
+ }
+
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_nosb;
+ }
- if (server->client != NULL && !IS_ERR(server->client))
- rpc_shutdown_client(server->client);
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
+ }
- destroy_nfsv4_state(server);
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs4_clone_super(s, data->sb);
+ }
+
+ mntroot = nfs4_get_root(s, data->fh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
+ }
- rpciod_down();
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
+
+ dprintk("<-- nfs4_xdev_get_sb() = 0\n");
+ return 0;
+
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error);
+ return error;
- nfs_free_iostats(server->io_stats);
- kfree(server->hostname);
- kfree(server);
- nfs_release_automount_timer();
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error);
+ return error;
}
/*
- * Constructs the SERVER-side path
+ * Create an NFS4 server record on referral traversal
*/
-static inline char *nfs4_dup_path(const struct dentry *dentry)
+static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
{
- char *page = (char *) __get_free_page(GFP_USER);
- char *path;
+ struct nfs_clone_mount *data = raw_data;
+ struct super_block *s;
+ struct nfs_server *server;
+ struct dentry *mntroot;
+ struct nfs_fh mntfh;
+ int error;
- path = nfs4_path(dentry, page, PAGE_SIZE);
- if (!IS_ERR(path)) {
- int len = PAGE_SIZE + page - path;
- char *tmp = path;
+ dprintk("--> nfs4_referral_get_sb()\n");
- path = kmalloc(len, GFP_KERNEL);
- if (path)
- memcpy(path, tmp, len);
- else
- path = ERR_PTR(-ENOMEM);
+ /* create a new volume representation */
+ server = nfs4_create_referral_server(data, &mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
}
- free_page((unsigned long)page);
- return path;
-}
-static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
-{
- const struct dentry *dentry = data->dentry;
- struct nfs4_client *clp = server->nfs4_state;
- struct super_block *sb;
-
- server->fsid = data->fattr->fsid;
- nfs_copy_fh(&server->fh, data->fh);
- server->mnt_path = nfs4_dup_path(dentry);
- if (IS_ERR(server->mnt_path)) {
- sb = (struct super_block *)server->mnt_path;
- goto err;
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_nosb;
}
- sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
- if (IS_ERR(sb) || sb->s_root)
- goto free_path;
- nfs4_server_capabilities(server, &server->fh);
-
- down_write(&clp->cl_sem);
- atomic_inc(&clp->cl_count);
- list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
- up_write(&clp->cl_sem);
- return sb;
-free_path:
- kfree(server->mnt_path);
-err:
- server->mnt_path = NULL;
- return sb;
-}
-static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
-{
- struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server, mnt);
-}
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
+ }
-static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data)
-{
- struct super_block *sb = ERR_PTR(-ENOMEM);
- int len;
-
- len = strlen(data->mnt_path) + 1;
- server->mnt_path = kmalloc(len, GFP_KERNEL);
- if (server->mnt_path == NULL)
- goto err;
- memcpy(server->mnt_path, data->mnt_path, len);
- memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in));
-
- sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
- if (IS_ERR(sb) || sb->s_root)
- goto free_path;
- return sb;
-free_path:
- kfree(server->mnt_path);
-err:
- server->mnt_path = NULL;
- return sb;
-}
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs4_fill_super(s);
+ }
-static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data)
-{
- struct nfs_server *server = NFS_SB(sb);
- struct rpc_timeout timeparms;
- int proto, timeo, retrans;
- void *err;
-
- proto = IPPROTO_TCP;
- /* Since we are following a referral and there may be alternatives,
- set the timeouts and retries to low values */
- timeo = 2;
- retrans = 1;
- nfs_init_timeout_values(&timeparms, proto, timeo, retrans);
-
- server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor);
- if (IS_ERR((err = server->client)))
- goto out_err;
+ mntroot = nfs4_get_root(s, data->fh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
+ }
- sb->s_time_gran = 1;
- sb->s_op = &nfs4_sops;
- err = ERR_PTR(nfs_sb_init(sb, data->authflavor));
- if (!IS_ERR(err))
- return server;
-out_err:
- return (struct nfs_server *)err;
-}
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
-static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
-{
- struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server, mnt);
+ dprintk("<-- nfs4_referral_get_sb() = 0\n");
+ return 0;
+
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ return error;
+
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ return error;
}
-#endif
+#endif /* CONFIG_NFS_V4 */
out:
clear_bit(BDI_write_congested, &bdi->state);
wake_up_all(&nfs_write_congestion);
+ writeback_congestion_end();
return err;
}
dprintk("NFS: %4d nfs_writeback_done (status %d)\n",
task->tk_pid, task->tk_status);
- /* Call the NFS version-specific code */
+ /*
+ * ->write_done will attempt to use post-op attributes to detect
+ * conflicting writes by other clients. A strict interpretation
+ * of close-to-open would allow us to continue caching even if
+ * another writer had changed the file, but some applications
+ * depend on tighter cache coherency when writing.
+ */
status = NFS_PROTO(data->inode)->write_done(task, data);
if (status != 0)
return status;
if (time_before(complain, jiffies)) {
dprintk("NFS: faulty NFS server %s:"
" (committed = %d) != (stable = %d)\n",
- NFS_SERVER(data->inode)->hostname,
+ NFS_SERVER(data->inode)->nfs_client->cl_hostname,
resp->verf->committed, argp->stable);
complain = jiffies + 300 * HZ;
}
{
struct sockaddr_in addr;
struct nfs4_callback *cb = &clp->cl_callback;
- struct rpc_timeout timeparms;
- struct rpc_xprt * xprt;
+ struct rpc_timeout timeparms = {
+ .to_initval = (NFSD_LEASE_TIME/4) * HZ,
+ .to_retries = 5,
+ .to_maxval = (NFSD_LEASE_TIME/2) * HZ,
+ .to_exponential = 1,
+ };
struct rpc_program * program = &cb->cb_program;
- struct rpc_stat * stat = &cb->cb_stat;
- struct rpc_clnt * clnt;
+ struct rpc_create_args args = {
+ .protocol = IPPROTO_TCP,
+ .address = (struct sockaddr *)&addr,
+ .addrsize = sizeof(addr),
+ .timeout = &timeparms,
+ .servername = clp->cl_name.data,
+ .program = program,
+ .version = nfs_cb_version[1]->number,
+ .authflavor = RPC_AUTH_UNIX, /* XXX: need AUTH_GSS... */
+ .flags = (RPC_CLNT_CREATE_NOPING),
+ };
struct rpc_message msg = {
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
.rpc_argp = clp,
};
- char hostname[32];
int status;
if (atomic_read(&cb->cb_set))
addr.sin_port = htons(cb->cb_port);
addr.sin_addr.s_addr = htonl(cb->cb_addr);
- /* Initialize timeout */
- timeparms.to_initval = (NFSD_LEASE_TIME/4) * HZ;
- timeparms.to_retries = 0;
- timeparms.to_maxval = (NFSD_LEASE_TIME/2) * HZ;
- timeparms.to_exponential = 1;
-
- /* Create RPC transport */
- xprt = xprt_create_proto(IPPROTO_TCP, &addr, &timeparms);
- if (IS_ERR(xprt)) {
- dprintk("NFSD: couldn't create callback transport!\n");
- goto out_err;
- }
-
/* Initialize rpc_program */
program->name = "nfs4_cb";
program->number = cb->cb_prog;
program->nrvers = ARRAY_SIZE(nfs_cb_version);
program->version = nfs_cb_version;
- program->stats = stat;
+ program->stats = &cb->cb_stat;
/* Initialize rpc_stat */
- memset(stat, 0, sizeof(struct rpc_stat));
- stat->program = program;
-
- /* Create RPC client
- *
- * XXX AUTH_UNIX only - need AUTH_GSS....
- */
- sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr.sin_addr.s_addr));
- clnt = rpc_new_client(xprt, hostname, program, 1, RPC_AUTH_UNIX);
- if (IS_ERR(clnt)) {
+ memset(program->stats, 0, sizeof(cb->cb_stat));
+ program->stats->program = program;
+
+ /* Create RPC client */
+ cb->cb_client = rpc_create(&args);
+ if (!cb->cb_client) {
dprintk("NFSD: couldn't create callback client\n");
goto out_err;
}
- clnt->cl_intr = 0;
- clnt->cl_softrtry = 1;
/* Kick rpciod, put the call on the wire. */
-
- if (rpciod_up() != 0) {
- dprintk("nfsd: couldn't start rpciod for callbacks!\n");
+ if (rpciod_up() != 0)
goto out_clnt;
- }
-
- cb->cb_client = clnt;
/* the task holds a reference to the nfs4_client struct */
atomic_inc(&clp->cl_count);
msg.rpc_cred = nfsd4_lookupcred(clp,0);
if (IS_ERR(msg.rpc_cred))
goto out_rpciod;
- status = rpc_call_async(clnt, &msg, RPC_TASK_ASYNC, &nfs4_cb_null_ops, NULL);
+ status = rpc_call_async(cb->cb_client, &msg, RPC_TASK_ASYNC, &nfs4_cb_null_ops, NULL);
put_rpccred(msg.rpc_cred);
if (status != 0) {
rpciod_down();
cb->cb_client = NULL;
out_clnt:
- rpc_shutdown_client(clnt);
+ rpc_shutdown_client(cb->cb_client);
out_err:
dprintk("NFSD: warning: no callback path to client %.*s\n",
(int)clp->cl_name.len, clp->cl_name.data);
extern int blk_queue_resize_tags(request_queue_t *, int);
extern void blk_queue_invalidate_tags(request_queue_t *);
extern long blk_congestion_wait(int rw, long timeout);
+extern void blk_congestion_end(int rw);
extern void blk_rq_bio_prep(request_queue_t *, struct request *, struct bio *);
extern int blkdev_issue_flush(struct block_device *, sector_t *);
*/
extern void d_instantiate(struct dentry *, struct inode *);
extern struct dentry * d_instantiate_unique(struct dentry *, struct inode *);
+extern struct dentry * d_materialise_unique(struct dentry *, struct inode *);
extern void d_delete(struct dentry *);
/* allocate/de-allocate */
#include <linux/in.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
+#include <linux/rbtree.h>
#include <linux/rwsem.h>
#include <linux/wait.h>
* NFSv3/v4 Access mode cache entry
*/
struct nfs_access_entry {
+ struct rb_node rb_node;
+ struct list_head lru;
unsigned long jiffies;
struct rpc_cred * cred;
int mask;
*/
atomic_t data_updates;
- struct nfs_access_entry cache_access;
+ struct rb_root access_cache;
+ struct list_head access_cache_entry_lru;
+ struct list_head access_cache_inode_lru;
#ifdef CONFIG_NFS_V3_ACL
struct posix_acl *acl_access;
struct posix_acl *acl_default;
#define NFS_INO_REVALIDATING (0) /* revalidating attrs */
#define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */
#define NFS_INO_STALE (2) /* possible stale inode */
+#define NFS_INO_ACL_LRU_SET (3) /* Inode is on the LRU list */
static inline struct nfs_inode *NFS_I(struct inode *inode)
{
#define NFS_FH(inode) (&NFS_I(inode)->fh)
#define NFS_SERVER(inode) (NFS_SB(inode->i_sb))
#define NFS_CLIENT(inode) (NFS_SERVER(inode)->client)
-#define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops)
-#define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode)))
+#define NFS_PROTO(inode) (NFS_SERVER(inode)->nfs_client->rpc_ops)
#define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf)
#define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies)
#define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr)
extern int nfs_permission(struct inode *, int, struct nameidata *);
extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
+extern void nfs_access_zap_cache(struct inode *inode);
extern int nfs_open(struct inode *, struct file *);
extern int nfs_release(struct inode *, struct file *);
extern int nfs_attribute_timeout(struct inode *inode);
#define NFSDBG_FILE 0x0040
#define NFSDBG_ROOT 0x0080
#define NFSDBG_CALLBACK 0x0100
+#define NFSDBG_CLIENT 0x0200
#define NFSDBG_ALL 0xFFFF
#ifdef __KERNEL__
struct nfs_iostats;
+/*
+ * The nfs_client identifies our client state to the server.
+ */
+struct nfs_client {
+ atomic_t cl_count;
+ int cl_cons_state; /* current construction state (-ve: init error) */
+#define NFS_CS_READY 0 /* ready to be used */
+#define NFS_CS_INITING 1 /* busy initialising */
+ int cl_nfsversion; /* NFS protocol version */
+ unsigned long cl_res_state; /* NFS resources state */
+#define NFS_CS_RPCIOD 0 /* - rpciod started */
+#define NFS_CS_CALLBACK 1 /* - callback started */
+#define NFS_CS_IDMAP 2 /* - idmap started */
+#define NFS_CS_RENEWD 3 /* - renewd started */
+ struct sockaddr_in cl_addr; /* server identifier */
+ char * cl_hostname; /* hostname of server */
+ struct list_head cl_share_link; /* link in global client list */
+ struct list_head cl_superblocks; /* List of nfs_server structs */
+
+ struct rpc_clnt * cl_rpcclient;
+ const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
+ unsigned long retrans_timeo; /* retransmit timeout */
+ unsigned int retrans_count; /* number of retransmit tries */
+
+#ifdef CONFIG_NFS_V4
+ u64 cl_clientid; /* constant */
+ nfs4_verifier cl_confirm;
+ unsigned long cl_state;
+
+ u32 cl_lockowner_id;
+
+ /*
+ * The following rwsem ensures exclusive access to the server
+ * while we recover the state following a lease expiration.
+ */
+ struct rw_semaphore cl_sem;
+
+ struct list_head cl_delegations;
+ struct list_head cl_state_owners;
+ struct list_head cl_unused;
+ int cl_nunused;
+ spinlock_t cl_lock;
+
+ unsigned long cl_lease_time;
+ unsigned long cl_last_renewal;
+ struct work_struct cl_renewd;
+
+ struct rpc_wait_queue cl_rpcwaitq;
+
+ /* used for the setclientid verifier */
+ struct timespec cl_boot_time;
+
+ /* idmapper */
+ struct idmap * cl_idmap;
+
+ /* Our own IP address, as a null-terminated string.
+ * This is used to generate the clientid, and the callback address.
+ */
+ char cl_ipaddr[16];
+ unsigned char cl_id_uniquifier;
+#endif
+};
+
/*
* NFS client parameters stored in the superblock.
*/
struct nfs_server {
+ struct nfs_client * nfs_client; /* shared client and NFS4 state */
+ struct list_head client_link; /* List of other nfs_server structs
+ * that share the same client
+ */
+ struct list_head master_link; /* link in master servers list */
struct rpc_clnt * client; /* RPC client handle */
- struct rpc_clnt * client_sys; /* 2nd handle for FSINFO */
struct rpc_clnt * client_acl; /* ACL RPC client handle */
- struct nfs_rpc_ops * rpc_ops; /* NFS protocol vector */
struct nfs_iostats * io_stats; /* I/O statistics */
struct backing_dev_info backing_dev_info;
int flags; /* various flags */
unsigned int acregmax;
unsigned int acdirmin;
unsigned int acdirmax;
- unsigned long retrans_timeo; /* retransmit timeout */
- unsigned int retrans_count; /* number of retransmit tries */
unsigned int namelen;
- char * hostname; /* remote hostname */
- struct nfs_fh fh;
- struct sockaddr_in addr;
+
struct nfs_fsid fsid;
+ __u64 maxfilesize; /* maximum file size */
unsigned long mount_time; /* when this fs was mounted */
+ dev_t s_dev; /* superblock dev numbers */
+
#ifdef CONFIG_NFS_V4
- /* Our own IP address, as a null-terminated string.
- * This is used to generate the clientid, and the callback address.
- */
- char ip_addr[16];
- char * mnt_path;
- struct nfs4_client * nfs4_state; /* all NFSv4 state starts here */
- struct list_head nfs4_siblings; /* List of other nfs_server structs
- * that share the same clientid
- */
u32 attr_bitmask[2];/* V4 bitmask representing the set
of attributes supported on this
filesystem */
that are supported on this
filesystem */
#endif
+ void (*destroy)(struct nfs_server *);
};
/* Server capabilities */
#ifdef __KERNEL__
/* Forward declaration to make this header independent of others */
-struct nfs4_client;
+struct nfs_client;
-void nfs_idmap_new(struct nfs4_client *);
-void nfs_idmap_delete(struct nfs4_client *);
+int nfs_idmap_new(struct nfs_client *);
+void nfs_idmap_delete(struct nfs_client *);
-int nfs_map_name_to_uid(struct nfs4_client *, const char *, size_t, __u32 *);
-int nfs_map_group_to_gid(struct nfs4_client *, const char *, size_t, __u32 *);
-int nfs_map_uid_to_name(struct nfs4_client *, __u32, char *);
-int nfs_map_gid_to_group(struct nfs4_client *, __u32, char *);
+int nfs_map_name_to_uid(struct nfs_client *, const char *, size_t, __u32 *);
+int nfs_map_group_to_gid(struct nfs_client *, const char *, size_t, __u32 *);
+int nfs_map_uid_to_name(struct nfs_client *, __u32, char *);
+int nfs_map_gid_to_group(struct nfs_client *, __u32, char *);
extern unsigned int nfs_idmap_cache_timeout;
#endif /* __KERNEL__ */
#ifndef _LINUX_NFS_XDR_H
#define _LINUX_NFS_XDR_H
-#include <linux/sunrpc/xprt.h>
#include <linux/nfsacl.h>
/*
struct nfs_fh * fromfh;
const char * fromname;
unsigned int fromlen;
- const char * topath;
- unsigned int tolen;
+ struct page ** pages;
+ unsigned int pathlen;
struct iattr * sattr;
};
struct nfs_fh * fromfh;
const char * fromname;
unsigned int fromlen;
- const char * topath;
- unsigned int tolen;
+ struct page ** pages;
+ unsigned int pathlen;
struct iattr * sattr;
};
struct nfs4_create_arg {
u32 ftype;
union {
- struct qstr * symlink; /* NF4LNK */
+ struct {
+ struct page ** pages;
+ unsigned int len;
+ } symlink; /* NF4LNK */
struct {
u32 specdata1;
u32 specdata2;
int (*getroot) (struct nfs_server *, struct nfs_fh *,
struct nfs_fsinfo *);
+ int (*lookupfh)(struct nfs_server *, struct nfs_fh *,
+ struct qstr *, struct nfs_fh *,
+ struct nfs_fattr *);
int (*getattr) (struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *);
int (*setattr) (struct dentry *, struct nfs_fattr *,
int (*rename) (struct inode *, struct qstr *,
struct inode *, struct qstr *);
int (*link) (struct inode *, struct inode *, struct qstr *);
- int (*symlink) (struct inode *, struct qstr *, struct qstr *,
- struct iattr *, struct nfs_fh *,
- struct nfs_fattr *);
+ int (*symlink) (struct inode *, struct dentry *, struct page *,
+ unsigned int, struct iattr *);
int (*mkdir) (struct inode *, struct dentry *, struct iattr *);
int (*rmdir) (struct inode *, struct qstr *);
int (*readdir) (struct dentry *, struct rpc_cred *,
struct nfs_fsinfo *);
int (*pathconf) (struct nfs_server *, struct nfs_fh *,
struct nfs_pathconf *);
+ int (*set_capabilities)(struct nfs_server *, struct nfs_fh *);
u32 * (*decode_dirent)(u32 *, struct nfs_entry *, int plus);
void (*read_setup) (struct nfs_read_data *);
int (*read_done) (struct rpc_task *, struct nfs_read_data *);
/*
* Function vectors etc. for the NFS client
*/
-extern struct nfs_rpc_ops nfs_v2_clientops;
-extern struct nfs_rpc_ops nfs_v3_clientops;
-extern struct nfs_rpc_ops nfs_v4_clientops;
+extern const struct nfs_rpc_ops nfs_v2_clientops;
+extern const struct nfs_rpc_ops nfs_v3_clientops;
+extern const struct nfs_rpc_ops nfs_v4_clientops;
extern struct rpc_version nfs_version2;
extern struct rpc_version nfs_version3;
extern struct rpc_version nfs_version4;
#include <linux/sunrpc/timer.h>
#include <asm/signal.h>
-/*
- * This defines an RPC port mapping
- */
-struct rpc_portmap {
- __u32 pm_prog;
- __u32 pm_vers;
- __u32 pm_prot;
- __u16 pm_port;
- unsigned char pm_binding : 1; /* doing a getport() */
- struct rpc_wait_queue pm_bindwait; /* waiting on getport() */
-};
-
struct rpc_inode;
/*
atomic_t cl_users; /* number of references */
struct rpc_xprt * cl_xprt; /* transport */
struct rpc_procinfo * cl_procinfo; /* procedure info */
- u32 cl_maxproc; /* max procedure number */
+ u32 cl_prog, /* RPC program number */
+ cl_vers, /* RPC version number */
+ cl_maxproc; /* max procedure number */
char * cl_server; /* server machine name */
char * cl_protname; /* protocol name */
cl_dead : 1;/* abandoned */
struct rpc_rtt * cl_rtt; /* RTO estimator data */
- struct rpc_portmap * cl_pmap; /* port mapping */
int cl_nodelen; /* nodename length */
char cl_nodename[UNX_MAXNODENAME];
struct dentry * cl_dentry; /* inode */
struct rpc_clnt * cl_parent; /* Points to parent of clones */
struct rpc_rtt cl_rtt_default;
- struct rpc_portmap cl_pmap_default;
char cl_inline_name[32];
};
-#define cl_timeout cl_xprt->timeout
-#define cl_prog cl_pmap->pm_prog
-#define cl_vers cl_pmap->pm_vers
-#define cl_port cl_pmap->pm_port
-#define cl_prot cl_pmap->pm_prot
/*
* General RPC program info
char * p_name; /* name of procedure */
};
-#define RPC_CONGESTED(clnt) (RPCXPRT_CONGESTED((clnt)->cl_xprt))
-#define RPC_PEERADDR(clnt) (&(clnt)->cl_xprt->addr)
-
#ifdef __KERNEL__
-struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
- struct rpc_program *info,
- u32 version, rpc_authflavor_t authflavor);
-struct rpc_clnt *rpc_new_client(struct rpc_xprt *xprt, char *servname,
- struct rpc_program *info,
- u32 version, rpc_authflavor_t authflavor);
+struct rpc_create_args {
+ int protocol;
+ struct sockaddr *address;
+ size_t addrsize;
+ struct rpc_timeout *timeout;
+ char *servername;
+ struct rpc_program *program;
+ u32 version;
+ rpc_authflavor_t authflavor;
+ unsigned long flags;
+};
+
+/* Values for "flags" field */
+#define RPC_CLNT_CREATE_HARDRTRY (1UL << 0)
+#define RPC_CLNT_CREATE_INTR (1UL << 1)
+#define RPC_CLNT_CREATE_AUTOBIND (1UL << 2)
+#define RPC_CLNT_CREATE_ONESHOT (1UL << 3)
+#define RPC_CLNT_CREATE_NONPRIVPORT (1UL << 4)
+#define RPC_CLNT_CREATE_NOPING (1UL << 5)
+
+struct rpc_clnt *rpc_create(struct rpc_create_args *args);
struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
struct rpc_program *, int);
struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
int rpc_shutdown_client(struct rpc_clnt *);
int rpc_destroy_client(struct rpc_clnt *);
void rpc_release_client(struct rpc_clnt *);
-void rpc_getport(struct rpc_task *, struct rpc_clnt *);
+void rpc_getport(struct rpc_task *);
int rpc_register(u32, u32, int, unsigned short, int *);
void rpc_call_setup(struct rpc_task *, struct rpc_message *, int);
size_t rpc_max_payload(struct rpc_clnt *);
void rpc_force_rebind(struct rpc_clnt *);
int rpc_ping(struct rpc_clnt *clnt, int flags);
+size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
+char * rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
/*
* Helper function for NFSroot support
extern struct dentry *rpc_mkdir(char *, struct rpc_clnt *);
extern int rpc_rmdir(struct dentry *);
-extern struct dentry *rpc_mkpipe(char *, void *, struct rpc_pipe_ops *, int flags);
+extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *, struct rpc_pipe_ops *, int flags);
extern int rpc_unlink(struct dentry *);
extern struct vfsmount *rpc_get_mount(void);
extern void rpc_put_mount(void);
*/
#define RPC_TASK_ASYNC 0x0001 /* is an async task */
#define RPC_TASK_SWAPPER 0x0002 /* is swapping in/out */
-#define RPC_TASK_CHILD 0x0008 /* is child of other task */
#define RPC_CALL_MAJORSEEN 0x0020 /* major timeout seen */
#define RPC_TASK_ROOTCREDS 0x0040 /* force root creds */
#define RPC_TASK_DYNAMIC 0x0080 /* task was kmalloc'ed */
#define RPC_TASK_NOINTR 0x0400 /* uninterruptible task */
#define RPC_IS_ASYNC(t) ((t)->tk_flags & RPC_TASK_ASYNC)
-#define RPC_IS_CHILD(t) ((t)->tk_flags & RPC_TASK_CHILD)
#define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER)
#define RPC_DO_ROOTOVERRIDE(t) ((t)->tk_flags & RPC_TASK_ROOTCREDS)
#define RPC_ASSASSINATED(t) ((t)->tk_flags & RPC_TASK_KILLED)
const struct rpc_call_ops *ops, void *data);
struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags,
const struct rpc_call_ops *ops, void *data);
-struct rpc_task *rpc_new_child(struct rpc_clnt *, struct rpc_task *parent);
void rpc_init_task(struct rpc_task *task, struct rpc_clnt *clnt,
int flags, const struct rpc_call_ops *ops,
void *data);
void rpc_exit_task(struct rpc_task *);
void rpc_killall_tasks(struct rpc_clnt *);
int rpc_execute(struct rpc_task *);
-void rpc_run_child(struct rpc_task *parent, struct rpc_task *child,
- rpc_action action);
void rpc_init_priority_wait_queue(struct rpc_wait_queue *, const char *);
void rpc_init_wait_queue(struct rpc_wait_queue *, const char *);
void rpc_sleep_on(struct rpc_wait_queue *, struct rpc_task *,
#include <linux/uio.h>
#include <linux/socket.h>
#include <linux/in.h>
+#include <linux/kref.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xdr.h>
unsigned char to_exponential;
};
+enum rpc_display_format_t {
+ RPC_DISPLAY_ADDR = 0,
+ RPC_DISPLAY_PORT,
+ RPC_DISPLAY_PROTO,
+ RPC_DISPLAY_ALL,
+ RPC_DISPLAY_MAX,
+};
+
struct rpc_task;
struct rpc_xprt;
struct seq_file;
struct rpc_xprt_ops {
void (*set_buffer_size)(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize);
+ char * (*print_addr)(struct rpc_xprt *xprt, enum rpc_display_format_t format);
int (*reserve_xprt)(struct rpc_task *task);
void (*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task);
+ void (*rpcbind)(struct rpc_task *task);
void (*set_port)(struct rpc_xprt *xprt, unsigned short port);
void (*connect)(struct rpc_task *task);
void * (*buf_alloc)(struct rpc_task *task, size_t size);
};
struct rpc_xprt {
+ struct kref kref; /* Reference count */
struct rpc_xprt_ops * ops; /* transport methods */
struct socket * sock; /* BSD socket layer */
struct sock * inet; /* INET layer */
struct rpc_timeout timeout; /* timeout parms */
- struct sockaddr_in addr; /* server address */
+ struct sockaddr_storage addr; /* server address */
+ size_t addrlen; /* size of server address */
int prot; /* IP protocol */
unsigned long cong; /* current congestion */
unsigned int tsh_size; /* size of transport specific
header */
+ struct rpc_wait_queue binding; /* requests waiting on rpcbind */
struct rpc_wait_queue sending; /* requests waiting to send */
struct rpc_wait_queue resend; /* requests waiting to resend */
struct rpc_wait_queue pending; /* requests in flight */
void (*old_data_ready)(struct sock *, int);
void (*old_state_change)(struct sock *);
void (*old_write_space)(struct sock *);
+
+ char * address_strings[RPC_DISPLAY_MAX];
};
#define XPRT_LAST_FRAG (1 << 0)
/*
* Transport operations used by ULPs
*/
-struct rpc_xprt * xprt_create_proto(int proto, struct sockaddr_in *addr, struct rpc_timeout *to);
void xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long incr);
/*
* Generic internal transport functions
*/
+struct rpc_xprt * xprt_create_transport(int proto, struct sockaddr *addr, size_t size, struct rpc_timeout *toparms);
void xprt_connect(struct rpc_task *task);
void xprt_reserve(struct rpc_task *task);
int xprt_reserve_xprt(struct rpc_task *task);
void xprt_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task);
void xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task);
void xprt_release(struct rpc_task *task);
-int xprt_destroy(struct rpc_xprt *xprt);
+struct rpc_xprt * xprt_get(struct rpc_xprt *xprt);
+void xprt_put(struct rpc_xprt *xprt);
static inline u32 *xprt_skip_transport_header(struct rpc_xprt *xprt, u32 *p)
{
#define XPRT_CONNECTED (1)
#define XPRT_CONNECTING (2)
#define XPRT_CLOSE_WAIT (3)
+#define XPRT_BOUND (4)
+#define XPRT_BINDING (5)
static inline void xprt_set_connected(struct rpc_xprt *xprt)
{
return test_and_set_bit(XPRT_CONNECTING, &xprt->state);
}
+static inline void xprt_set_bound(struct rpc_xprt *xprt)
+{
+ test_and_set_bit(XPRT_BOUND, &xprt->state);
+}
+
+static inline int xprt_bound(struct rpc_xprt *xprt)
+{
+ return test_bit(XPRT_BOUND, &xprt->state);
+}
+
+static inline void xprt_clear_bound(struct rpc_xprt *xprt)
+{
+ clear_bit(XPRT_BOUND, &xprt->state);
+}
+
+static inline void xprt_clear_binding(struct rpc_xprt *xprt)
+{
+ smp_mb__before_clear_bit();
+ clear_bit(XPRT_BINDING, &xprt->state);
+ smp_mb__after_clear_bit();
+}
+
+static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt)
+{
+ return test_and_set_bit(XPRT_BINDING, &xprt->state);
+}
+
#endif /* __KERNEL__*/
#endif /* _LINUX_SUNRPC_XPRT_H */
void laptop_io_completion(void);
void laptop_sync_completion(void);
void throttle_vm_writeout(void);
+void writeback_congestion_end(void);
/* These are exported to sysctl. */
extern int dirty_background_ratio;
}
EXPORT_SYMBOL(test_set_page_writeback);
+/*
+ * Wakes up tasks that are being throttled due to writeback congestion
+ */
+void writeback_congestion_end(void)
+{
+ blk_congestion_end(WRITE);
+}
+EXPORT_SYMBOL(writeback_congestion_end);
+
/*
* Return true if any of the pages in the mapping are marged with the
* passed tag.
struct list_head upcalls;
struct rpc_clnt *client;
struct dentry *dentry;
- char path[48];
spinlock_t lock;
};
if (err)
goto err_put_mech;
- snprintf(gss_auth->path, sizeof(gss_auth->path), "%s/%s",
- clnt->cl_pathname,
- gss_auth->mech->gm_name);
- gss_auth->dentry = rpc_mkpipe(gss_auth->path, clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN);
+ gss_auth->dentry = rpc_mkpipe(clnt->cl_dentry, gss_auth->mech->gm_name,
+ clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN);
if (IS_ERR(gss_auth->dentry)) {
err = PTR_ERR(gss_auth->dentry);
goto err_put_mech;
}
}
-/*
- * Create an RPC client
- * FIXME: This should also take a flags argument (as in task->tk_flags).
- * It's called (among others) from pmap_create_client, which may in
- * turn be called by an async task. In this case, rpciod should not be
- * made to sleep too long.
- */
-struct rpc_clnt *
-rpc_new_client(struct rpc_xprt *xprt, char *servname,
- struct rpc_program *program, u32 vers,
- rpc_authflavor_t flavor)
+static struct rpc_clnt * rpc_new_client(struct rpc_xprt *xprt, char *servname, struct rpc_program *program, u32 vers, rpc_authflavor_t flavor)
{
struct rpc_version *version;
struct rpc_clnt *clnt = NULL;
clnt->cl_procinfo = version->procs;
clnt->cl_maxproc = version->nrprocs;
clnt->cl_protname = program->name;
- clnt->cl_pmap = &clnt->cl_pmap_default;
- clnt->cl_port = xprt->addr.sin_port;
clnt->cl_prog = program->number;
clnt->cl_vers = version->number;
- clnt->cl_prot = xprt->prot;
clnt->cl_stats = program->stats;
clnt->cl_metrics = rpc_alloc_iostats(clnt);
- rpc_init_wait_queue(&clnt->cl_pmap_default.pm_bindwait, "bindwait");
- if (!clnt->cl_port)
+ if (!xprt_bound(clnt->cl_xprt))
clnt->cl_autobind = 1;
clnt->cl_rtt = &clnt->cl_rtt_default;
kfree(clnt->cl_server);
kfree(clnt);
out_err:
- xprt_destroy(xprt);
+ xprt_put(xprt);
out_no_xprt:
return ERR_PTR(err);
}
-/**
- * Create an RPC client
- * @xprt - pointer to xprt struct
- * @servname - name of server
- * @info - rpc_program
- * @version - rpc_program version
- * @authflavor - rpc_auth flavour to use
+/*
+ * rpc_create - create an RPC client and transport with one call
+ * @args: rpc_clnt create argument structure
*
- * Creates an RPC client structure, then pings the server in order to
- * determine if it is up, and if it supports this program and version.
+ * Creates and initializes an RPC transport and an RPC client.
*
- * This function should never be called by asynchronous tasks such as
- * the portmapper.
+ * It can ping the server in order to determine if it is up, and to see if
+ * it supports this program and version. RPC_CLNT_CREATE_NOPING disables
+ * this behavior so asynchronous tasks can also use rpc_create.
*/
-struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
- struct rpc_program *info, u32 version, rpc_authflavor_t authflavor)
+struct rpc_clnt *rpc_create(struct rpc_create_args *args)
{
+ struct rpc_xprt *xprt;
struct rpc_clnt *clnt;
- int err;
-
- clnt = rpc_new_client(xprt, servname, info, version, authflavor);
+
+ xprt = xprt_create_transport(args->protocol, args->address,
+ args->addrsize, args->timeout);
+ if (IS_ERR(xprt))
+ return (struct rpc_clnt *)xprt;
+
+ /*
+ * By default, kernel RPC client connects from a reserved port.
+ * CAP_NET_BIND_SERVICE will not be set for unprivileged requesters,
+ * but it is always enabled for rpciod, which handles the connect
+ * operation.
+ */
+ xprt->resvport = 1;
+ if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT)
+ xprt->resvport = 0;
+
+ dprintk("RPC: creating %s client for %s (xprt %p)\n",
+ args->program->name, args->servername, xprt);
+
+ clnt = rpc_new_client(xprt, args->servername, args->program,
+ args->version, args->authflavor);
if (IS_ERR(clnt))
return clnt;
- err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
- if (err == 0)
- return clnt;
- rpc_shutdown_client(clnt);
- return ERR_PTR(err);
+
+ if (!(args->flags & RPC_CLNT_CREATE_NOPING)) {
+ int err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
+ if (err != 0) {
+ rpc_shutdown_client(clnt);
+ return ERR_PTR(err);
+ }
+ }
+
+ clnt->cl_softrtry = 1;
+ if (args->flags & RPC_CLNT_CREATE_HARDRTRY)
+ clnt->cl_softrtry = 0;
+
+ if (args->flags & RPC_CLNT_CREATE_INTR)
+ clnt->cl_intr = 1;
+ if (args->flags & RPC_CLNT_CREATE_AUTOBIND)
+ clnt->cl_autobind = 1;
+ if (args->flags & RPC_CLNT_CREATE_ONESHOT)
+ clnt->cl_oneshot = 1;
+
+ return clnt;
}
+EXPORT_SYMBOL_GPL(rpc_create);
/*
* This function clones the RPC client structure. It allows us to share the
atomic_set(&new->cl_users, 0);
new->cl_parent = clnt;
atomic_inc(&clnt->cl_count);
- /* Duplicate portmapper */
- rpc_init_wait_queue(&new->cl_pmap_default.pm_bindwait, "bindwait");
+ new->cl_xprt = xprt_get(clnt->cl_xprt);
/* Turn off autobind on clones */
new->cl_autobind = 0;
new->cl_oneshot = 0;
rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
if (new->cl_auth)
atomic_inc(&new->cl_auth->au_count);
- new->cl_pmap = &new->cl_pmap_default;
- new->cl_metrics = rpc_alloc_iostats(clnt);
+ new->cl_metrics = rpc_alloc_iostats(clnt);
return new;
out_no_clnt:
printk(KERN_INFO "RPC: out of memory in %s\n", __FUNCTION__);
rpc_rmdir(clnt->cl_dentry);
rpc_put_mount();
}
- if (clnt->cl_xprt) {
- xprt_destroy(clnt->cl_xprt);
- clnt->cl_xprt = NULL;
- }
if (clnt->cl_server != clnt->cl_inline_name)
kfree(clnt->cl_server);
out_free:
rpc_free_iostats(clnt->cl_metrics);
clnt->cl_metrics = NULL;
+ xprt_put(clnt->cl_xprt);
kfree(clnt);
return 0;
}
task->tk_action = rpc_exit_task;
}
+/**
+ * rpc_peeraddr - extract remote peer address from clnt's xprt
+ * @clnt: RPC client structure
+ * @buf: target buffer
+ * @size: length of target buffer
+ *
+ * Returns the number of bytes that are actually in the stored address.
+ */
+size_t rpc_peeraddr(struct rpc_clnt *clnt, struct sockaddr *buf, size_t bufsize)
+{
+ size_t bytes;
+ struct rpc_xprt *xprt = clnt->cl_xprt;
+
+ bytes = sizeof(xprt->addr);
+ if (bytes > bufsize)
+ bytes = bufsize;
+ memcpy(buf, &clnt->cl_xprt->addr, bytes);
+ return xprt->addrlen;
+}
+EXPORT_SYMBOL_GPL(rpc_peeraddr);
+
+/**
+ * rpc_peeraddr2str - return remote peer address in printable format
+ * @clnt: RPC client structure
+ * @format: address format
+ *
+ */
+char *rpc_peeraddr2str(struct rpc_clnt *clnt, enum rpc_display_format_t format)
+{
+ struct rpc_xprt *xprt = clnt->cl_xprt;
+ return xprt->ops->print_addr(xprt, format);
+}
+EXPORT_SYMBOL_GPL(rpc_peeraddr2str);
+
void
rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize)
{
{
return clnt->cl_xprt->max_payload;
}
-EXPORT_SYMBOL(rpc_max_payload);
+EXPORT_SYMBOL_GPL(rpc_max_payload);
/**
* rpc_force_rebind - force transport to check that remote port is unchanged
void rpc_force_rebind(struct rpc_clnt *clnt)
{
if (clnt->cl_autobind)
- clnt->cl_port = 0;
+ xprt_clear_bound(clnt->cl_xprt);
}
-EXPORT_SYMBOL(rpc_force_rebind);
+EXPORT_SYMBOL_GPL(rpc_force_rebind);
/*
* Restart an (async) RPC call. Usually called from within the
static void
call_bind(struct rpc_task *task)
{
- struct rpc_clnt *clnt = task->tk_client;
+ struct rpc_xprt *xprt = task->tk_xprt;
dprintk("RPC: %4d call_bind (status %d)\n",
task->tk_pid, task->tk_status);
task->tk_action = call_connect;
- if (!clnt->cl_port) {
+ if (!xprt_bound(xprt)) {
task->tk_action = call_bind_status;
- task->tk_timeout = task->tk_xprt->bind_timeout;
- rpc_getport(task, clnt);
+ task->tk_timeout = xprt->bind_timeout;
+ xprt->ops->rpcbind(task);
}
}
dprintk("RPC: %4d remote rpcbind: RPC program/version unavailable\n",
task->tk_pid);
rpc_delay(task, 3*HZ);
- goto retry_bind;
+ goto retry_timeout;
case -ETIMEDOUT:
dprintk("RPC: %4d rpcbind request timed out\n",
task->tk_pid);
- if (RPC_IS_SOFT(task)) {
- status = -EIO;
- break;
- }
- goto retry_bind;
+ goto retry_timeout;
case -EPFNOSUPPORT:
dprintk("RPC: %4d remote rpcbind service unavailable\n",
task->tk_pid);
dprintk("RPC: %4d unrecognized rpcbind error (%d)\n",
task->tk_pid, -task->tk_status);
status = -EIO;
- break;
}
rpc_exit(task, status);
return;
-retry_bind:
- task->tk_status = 0;
- task->tk_action = call_bind;
- return;
+retry_timeout:
+ task->tk_action = call_timeout;
}
/*
switch (status) {
case -ENOTCONN:
- case -ETIMEDOUT:
case -EAGAIN:
task->tk_action = call_bind;
- break;
- default:
- rpc_exit(task, -EIO);
- break;
+ if (!RPC_IS_SOFT(task))
+ return;
+ /* if soft mounted, test if we've timed out */
+ case -ETIMEDOUT:
+ task->tk_action = call_timeout;
+ return;
}
+ rpc_exit(task, -EIO);
}
/*
task->tk_status = 0;
switch(status) {
+ case -EHOSTDOWN:
+ case -EHOSTUNREACH:
+ case -ENETUNREACH:
+ /*
+ * Delay any retries for 3 seconds, then handle as if it
+ * were a timeout.
+ */
+ rpc_delay(task, 3*HZ);
case -ETIMEDOUT:
task->tk_action = call_timeout;
break;
printk("%s: RPC call returned error %d\n",
clnt->cl_protname, -status);
rpc_exit(task, status);
- break;
}
}
clnt->cl_stats->rpcretrans++;
goto out_retry;
}
- printk(KERN_WARNING "%s: too small RPC reply size (%d bytes)\n",
+ dprintk("%s: too small RPC reply size (%d bytes)\n",
clnt->cl_protname, task->tk_status);
- rpc_exit(task, -EIO);
- return;
+ task->tk_action = call_timeout;
+ goto out_retry;
}
/*
/*
- * linux/net/sunrpc/pmap.c
+ * linux/net/sunrpc/pmap_clnt.c
*
- * Portmapper client.
+ * In-kernel RPC portmapper client.
+ *
+ * Portmapper supports version 2 of the rpcbind protocol (RFC 1833).
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/uio.h>
#include <linux/in.h>
#include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/xprt.h>
#include <linux/sunrpc/sched.h>
#ifdef RPC_DEBUG
#define PMAP_UNSET 2
#define PMAP_GETPORT 3
+struct portmap_args {
+ u32 pm_prog;
+ u32 pm_vers;
+ u32 pm_prot;
+ unsigned short pm_port;
+ struct rpc_xprt * pm_xprt;
+};
+
static struct rpc_procinfo pmap_procedures[];
static struct rpc_clnt * pmap_create(char *, struct sockaddr_in *, int, int);
-static void pmap_getport_done(struct rpc_task *);
+static void pmap_getport_done(struct rpc_task *, void *);
static struct rpc_program pmap_program;
-static DEFINE_SPINLOCK(pmap_lock);
-/*
- * Obtain the port for a given RPC service on a given host. This one can
- * be called for an ongoing RPC request.
- */
-void
-rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt)
+static void pmap_getport_prepare(struct rpc_task *task, void *calldata)
{
- struct rpc_portmap *map = clnt->cl_pmap;
- struct sockaddr_in *sap = &clnt->cl_xprt->addr;
+ struct portmap_args *map = calldata;
struct rpc_message msg = {
.rpc_proc = &pmap_procedures[PMAP_GETPORT],
.rpc_argp = map,
- .rpc_resp = &clnt->cl_port,
- .rpc_cred = NULL
+ .rpc_resp = &map->pm_port,
};
+
+ rpc_call_setup(task, &msg, 0);
+}
+
+static inline struct portmap_args *pmap_map_alloc(void)
+{
+ return kmalloc(sizeof(struct portmap_args), GFP_NOFS);
+}
+
+static inline void pmap_map_free(struct portmap_args *map)
+{
+ kfree(map);
+}
+
+static void pmap_map_release(void *data)
+{
+ pmap_map_free(data);
+}
+
+static const struct rpc_call_ops pmap_getport_ops = {
+ .rpc_call_prepare = pmap_getport_prepare,
+ .rpc_call_done = pmap_getport_done,
+ .rpc_release = pmap_map_release,
+};
+
+static inline void pmap_wake_portmap_waiters(struct rpc_xprt *xprt, int status)
+{
+ xprt_clear_binding(xprt);
+ rpc_wake_up_status(&xprt->binding, status);
+}
+
+/**
+ * rpc_getport - obtain the port for a given RPC service on a given host
+ * @task: task that is waiting for portmapper request
+ *
+ * This one can be called for an ongoing RPC request, and can be used in
+ * an async (rpciod) context.
+ */
+void rpc_getport(struct rpc_task *task)
+{
+ struct rpc_clnt *clnt = task->tk_client;
+ struct rpc_xprt *xprt = task->tk_xprt;
+ struct sockaddr_in addr;
+ struct portmap_args *map;
struct rpc_clnt *pmap_clnt;
- struct rpc_task *child;
+ struct rpc_task *child;
+ int status;
- dprintk("RPC: %4d rpc_getport(%s, %d, %d, %d)\n",
+ dprintk("RPC: %4d rpc_getport(%s, %u, %u, %d)\n",
task->tk_pid, clnt->cl_server,
- map->pm_prog, map->pm_vers, map->pm_prot);
+ clnt->cl_prog, clnt->cl_vers, xprt->prot);
/* Autobind on cloned rpc clients is discouraged */
BUG_ON(clnt->cl_parent != clnt);
- spin_lock(&pmap_lock);
- if (map->pm_binding) {
- rpc_sleep_on(&map->pm_bindwait, task, NULL, NULL);
- spin_unlock(&pmap_lock);
+ if (xprt_test_and_set_binding(xprt)) {
+ task->tk_status = -EACCES; /* tell caller to check again */
+ rpc_sleep_on(&xprt->binding, task, NULL, NULL);
return;
}
- map->pm_binding = 1;
- spin_unlock(&pmap_lock);
- pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot, 0);
- if (IS_ERR(pmap_clnt)) {
- task->tk_status = PTR_ERR(pmap_clnt);
+ /* Someone else may have bound if we slept */
+ status = 0;
+ if (xprt_bound(xprt))
+ goto bailout_nofree;
+
+ status = -ENOMEM;
+ map = pmap_map_alloc();
+ if (!map)
+ goto bailout_nofree;
+ map->pm_prog = clnt->cl_prog;
+ map->pm_vers = clnt->cl_vers;
+ map->pm_prot = xprt->prot;
+ map->pm_port = 0;
+ map->pm_xprt = xprt_get(xprt);
+
+ rpc_peeraddr(clnt, (struct sockaddr *) &addr, sizeof(addr));
+ pmap_clnt = pmap_create(clnt->cl_server, &addr, map->pm_prot, 0);
+ status = PTR_ERR(pmap_clnt);
+ if (IS_ERR(pmap_clnt))
goto bailout;
- }
- task->tk_status = 0;
- /*
- * Note: rpc_new_child will release client after a failure.
- */
- if (!(child = rpc_new_child(pmap_clnt, task)))
+ status = -EIO;
+ child = rpc_run_task(pmap_clnt, RPC_TASK_ASYNC, &pmap_getport_ops, map);
+ if (IS_ERR(child))
goto bailout;
+ rpc_release_task(child);
- /* Setup the call info struct */
- rpc_call_setup(child, &msg, 0);
+ rpc_sleep_on(&xprt->binding, task, NULL, NULL);
- /* ... and run the child task */
task->tk_xprt->stat.bind_count++;
- rpc_run_child(task, child, pmap_getport_done);
return;
bailout:
- spin_lock(&pmap_lock);
- map->pm_binding = 0;
- rpc_wake_up(&map->pm_bindwait);
- spin_unlock(&pmap_lock);
- rpc_exit(task, -EIO);
+ pmap_map_free(map);
+ xprt_put(xprt);
+bailout_nofree:
+ task->tk_status = status;
+ pmap_wake_portmap_waiters(xprt, status);
}
#ifdef CONFIG_ROOT_NFS
-int
-rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
+/**
+ * rpc_getport_external - obtain the port for a given RPC service on a given host
+ * @sin: address of remote peer
+ * @prog: RPC program number to bind
+ * @vers: RPC version number to bind
+ * @prot: transport protocol to use to make this request
+ *
+ * This one is called from outside the RPC client in a synchronous task context.
+ */
+int rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
{
- struct rpc_portmap map = {
+ struct portmap_args map = {
.pm_prog = prog,
.pm_vers = vers,
.pm_prot = prot,
char hostname[32];
int status;
- dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %d, %d, %d)\n",
+ dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
}
#endif
-static void
-pmap_getport_done(struct rpc_task *task)
+/*
+ * Portmapper child task invokes this callback via tk_exit.
+ */
+static void pmap_getport_done(struct rpc_task *child, void *data)
{
- struct rpc_clnt *clnt = task->tk_client;
- struct rpc_xprt *xprt = task->tk_xprt;
- struct rpc_portmap *map = clnt->cl_pmap;
-
- dprintk("RPC: %4d pmap_getport_done(status %d, port %d)\n",
- task->tk_pid, task->tk_status, clnt->cl_port);
-
- xprt->ops->set_port(xprt, 0);
- if (task->tk_status < 0) {
- /* Make the calling task exit with an error */
- task->tk_action = rpc_exit_task;
- } else if (clnt->cl_port == 0) {
- /* Program not registered */
- rpc_exit(task, -EACCES);
+ struct portmap_args *map = data;
+ struct rpc_xprt *xprt = map->pm_xprt;
+ int status = child->tk_status;
+
+ if (status < 0) {
+ /* Portmapper not available */
+ xprt->ops->set_port(xprt, 0);
+ } else if (map->pm_port == 0) {
+ /* Requested RPC service wasn't registered */
+ xprt->ops->set_port(xprt, 0);
+ status = -EACCES;
} else {
- xprt->ops->set_port(xprt, clnt->cl_port);
- clnt->cl_port = htons(clnt->cl_port);
+ /* Succeeded */
+ xprt->ops->set_port(xprt, map->pm_port);
+ xprt_set_bound(xprt);
+ status = 0;
}
- spin_lock(&pmap_lock);
- map->pm_binding = 0;
- rpc_wake_up(&map->pm_bindwait);
- spin_unlock(&pmap_lock);
+
+ dprintk("RPC: %4d pmap_getport_done(status %d, port %u)\n",
+ child->tk_pid, status, map->pm_port);
+
+ pmap_wake_portmap_waiters(xprt, status);
+ xprt_put(xprt);
}
-/*
- * Set or unset a port registration with the local portmapper.
+/**
+ * rpc_register - set or unset a port registration with the local portmapper
+ * @prog: RPC program number to bind
+ * @vers: RPC version number to bind
+ * @prot: transport protocol to use to make this request
+ * @port: port value to register
+ * @okay: result code
+ *
* port == 0 means unregister, port != 0 means register.
*/
-int
-rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
+int rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
{
struct sockaddr_in sin = {
.sin_family = AF_INET,
.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
};
- struct rpc_portmap map = {
+ struct portmap_args map = {
.pm_prog = prog,
.pm_vers = vers,
.pm_prot = prot,
struct rpc_clnt *pmap_clnt;
int error = 0;
- dprintk("RPC: registering (%d, %d, %d, %d) with portmapper.\n",
+ dprintk("RPC: registering (%u, %u, %d, %u) with portmapper.\n",
prog, vers, prot, port);
pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP, 1);
return error;
}
-static struct rpc_clnt *
-pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto, int privileged)
+static struct rpc_clnt *pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto, int privileged)
{
- struct rpc_xprt *xprt;
- struct rpc_clnt *clnt;
-
- /* printk("pmap: create xprt\n"); */
- xprt = xprt_create_proto(proto, srvaddr, NULL);
- if (IS_ERR(xprt))
- return (struct rpc_clnt *)xprt;
- xprt->ops->set_port(xprt, RPC_PMAP_PORT);
+ struct rpc_create_args args = {
+ .protocol = proto,
+ .address = (struct sockaddr *)srvaddr,
+ .addrsize = sizeof(*srvaddr),
+ .servername = hostname,
+ .program = &pmap_program,
+ .version = RPC_PMAP_VERSION,
+ .authflavor = RPC_AUTH_UNIX,
+ .flags = (RPC_CLNT_CREATE_ONESHOT |
+ RPC_CLNT_CREATE_NOPING),
+ };
+
+ srvaddr->sin_port = htons(RPC_PMAP_PORT);
if (!privileged)
- xprt->resvport = 0;
-
- /* printk("pmap: create clnt\n"); */
- clnt = rpc_new_client(xprt, hostname,
- &pmap_program, RPC_PMAP_VERSION,
- RPC_AUTH_UNIX);
- if (!IS_ERR(clnt)) {
- clnt->cl_softrtry = 1;
- clnt->cl_oneshot = 1;
- }
- return clnt;
+ args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
+ return rpc_create(&args);
}
/*
* XDR encode/decode functions for PMAP
*/
-static int
-xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct rpc_portmap *map)
+static int xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct portmap_args *map)
{
- dprintk("RPC: xdr_encode_mapping(%d, %d, %d, %d)\n",
+ dprintk("RPC: xdr_encode_mapping(%u, %u, %u, %u)\n",
map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port);
*p++ = htonl(map->pm_prog);
*p++ = htonl(map->pm_vers);
return 0;
}
-static int
-xdr_decode_port(struct rpc_rqst *req, u32 *p, unsigned short *portp)
+static int xdr_decode_port(struct rpc_rqst *req, u32 *p, unsigned short *portp)
{
*portp = (unsigned short) ntohl(*p++);
return 0;
}
-static int
-xdr_decode_bool(struct rpc_rqst *req, u32 *p, unsigned int *boolp)
+static int xdr_decode_bool(struct rpc_rqst *req, u32 *p, unsigned int *boolp)
{
*boolp = (unsigned int) ntohl(*p++);
return 0;
seq_printf(m, "RPC server: %s\n", clnt->cl_server);
seq_printf(m, "service: %s (%d) version %d\n", clnt->cl_protname,
clnt->cl_prog, clnt->cl_vers);
- seq_printf(m, "address: %u.%u.%u.%u\n",
- NIPQUAD(clnt->cl_xprt->addr.sin_addr.s_addr));
- seq_printf(m, "protocol: %s\n",
- clnt->cl_xprt->prot == IPPROTO_UDP ? "udp" : "tcp");
+ seq_printf(m, "address: %s\n", rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR));
+ seq_printf(m, "protocol: %s\n", rpc_peeraddr2str(clnt, RPC_DISPLAY_PROTO));
return 0;
}
}
static struct dentry *
-rpc_lookup_negative(char *path, struct nameidata *nd)
+rpc_lookup_create(struct dentry *parent, const char *name, int len)
{
+ struct inode *dir = parent->d_inode;
struct dentry *dentry;
- struct inode *dir;
- int error;
- if ((error = rpc_lookup_parent(path, nd)) != 0)
- return ERR_PTR(error);
- dir = nd->dentry->d_inode;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
- dentry = lookup_one_len(nd->last.name, nd->dentry, nd->last.len);
+ dentry = lookup_one_len(name, parent, len);
if (IS_ERR(dentry))
goto out_err;
if (dentry->d_inode) {
return dentry;
out_err:
mutex_unlock(&dir->i_mutex);
- rpc_release_path(nd);
+ return dentry;
+}
+
+static struct dentry *
+rpc_lookup_negative(char *path, struct nameidata *nd)
+{
+ struct dentry *dentry;
+ int error;
+
+ if ((error = rpc_lookup_parent(path, nd)) != 0)
+ return ERR_PTR(error);
+ dentry = rpc_lookup_create(nd->dentry, nd->last.name, nd->last.len);
+ if (IS_ERR(dentry))
+ rpc_release_path(nd);
return dentry;
}
}
struct dentry *
-rpc_mkpipe(char *path, void *private, struct rpc_pipe_ops *ops, int flags)
+rpc_mkpipe(struct dentry *parent, const char *name, void *private, struct rpc_pipe_ops *ops, int flags)
{
- struct nameidata nd;
struct dentry *dentry;
struct inode *dir, *inode;
struct rpc_inode *rpci;
- dentry = rpc_lookup_negative(path, &nd);
+ dentry = rpc_lookup_create(parent, name, strlen(name));
if (IS_ERR(dentry))
return dentry;
- dir = nd.dentry->d_inode;
- inode = rpc_get_inode(dir->i_sb, S_IFSOCK | S_IRUSR | S_IWUSR);
+ dir = parent->d_inode;
+ inode = rpc_get_inode(dir->i_sb, S_IFIFO | S_IRUSR | S_IWUSR);
if (!inode)
goto err_dput;
inode->i_ino = iunique(dir->i_sb, 100);
dget(dentry);
out:
mutex_unlock(&dir->i_mutex);
- rpc_release_path(&nd);
return dentry;
err_dput:
dput(dentry);
dentry = ERR_PTR(-ENOMEM);
- printk(KERN_WARNING "%s: %s() failed to create pipe %s (errno = %d)\n",
- __FILE__, __FUNCTION__, path, -ENOMEM);
+ printk(KERN_WARNING "%s: %s() failed to create pipe %s/%s (errno = %d)\n",
+ __FILE__, __FUNCTION__, parent->d_name.name, name,
+ -ENOMEM);
goto out;
}
#include <linux/mutex.h>
#include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/xprt.h>
#ifdef RPC_DEBUG
#define RPCDBG_FACILITY RPCDBG_SCHED
static void rpciod_killall(void);
static void rpc_async_schedule(void *);
-/*
- * RPC tasks that create another task (e.g. for contacting the portmapper)
- * will wait on this queue for their child's completion
- */
-static RPC_WAITQ(childq, "childq");
-
/*
* RPC tasks sit here while waiting for conditions to improve.
*/
wake_up_bit(&task->tk_runstate, RPC_TASK_QUEUED);
}
-/*
- * Place a newly initialized task on the workqueue.
- */
-static inline void
-rpc_schedule_run(struct rpc_task *task)
-{
- rpc_set_active(task);
- rpc_make_runnable(task);
-}
-
/*
* Prepare for sleeping on a wait queue.
* By always appending tasks to the list we ensure FIFO behavior.
spin_unlock_bh(&queue->lock);
}
+static void __rpc_atrun(struct rpc_task *task)
+{
+ rpc_wake_up_task(task);
+}
+
/*
* Run a task at a later time
*/
-static void __rpc_atrun(struct rpc_task *);
-void
-rpc_delay(struct rpc_task *task, unsigned long delay)
+void rpc_delay(struct rpc_task *task, unsigned long delay)
{
task->tk_timeout = delay;
rpc_sleep_on(&delay_queue, task, NULL, __rpc_atrun);
}
-static void
-__rpc_atrun(struct rpc_task *task)
-{
- task->tk_status = 0;
- rpc_wake_up_task(task);
-}
-
/*
* Helper to call task->tk_ops->rpc_call_prepare
*/
}
EXPORT_SYMBOL(rpc_run_task);
-/**
- * rpc_find_parent - find the parent of a child task.
- * @child: child task
- * @parent: parent task
- *
- * Checks that the parent task is still sleeping on the
- * queue 'childq'. If so returns a pointer to the parent.
- * Upon failure returns NULL.
- *
- * Caller must hold childq.lock
- */
-static inline struct rpc_task *rpc_find_parent(struct rpc_task *child, struct rpc_task *parent)
-{
- struct rpc_task *task;
- struct list_head *le;
-
- task_for_each(task, le, &childq.tasks[0])
- if (task == parent)
- return parent;
-
- return NULL;
-}
-
-static void rpc_child_exit(struct rpc_task *child, void *calldata)
-{
- struct rpc_task *parent;
-
- spin_lock_bh(&childq.lock);
- if ((parent = rpc_find_parent(child, calldata)) != NULL) {
- parent->tk_status = child->tk_status;
- __rpc_wake_up_task(parent);
- }
- spin_unlock_bh(&childq.lock);
-}
-
-static const struct rpc_call_ops rpc_child_ops = {
- .rpc_call_done = rpc_child_exit,
-};
-
-/*
- * Note: rpc_new_task releases the client after a failure.
- */
-struct rpc_task *
-rpc_new_child(struct rpc_clnt *clnt, struct rpc_task *parent)
-{
- struct rpc_task *task;
-
- task = rpc_new_task(clnt, RPC_TASK_ASYNC | RPC_TASK_CHILD, &rpc_child_ops, parent);
- if (!task)
- goto fail;
- return task;
-
-fail:
- parent->tk_status = -ENOMEM;
- return NULL;
-}
-
-void rpc_run_child(struct rpc_task *task, struct rpc_task *child, rpc_action func)
-{
- spin_lock_bh(&childq.lock);
- /* N.B. Is it possible for the child to have already finished? */
- __rpc_sleep_on(&childq, task, func, NULL);
- rpc_schedule_run(child);
- spin_unlock_bh(&childq.lock);
-}
-
/*
* Kill all tasks for the given client.
* XXX: kill their descendants as well?
EXPORT_SYMBOL(rpc_release_task);
/* RPC client functions */
-EXPORT_SYMBOL(rpc_create_client);
-EXPORT_SYMBOL(rpc_new_client);
EXPORT_SYMBOL(rpc_clone_client);
EXPORT_SYMBOL(rpc_bind_new_program);
EXPORT_SYMBOL(rpc_destroy_client);
EXPORT_SYMBOL(rpc_mkpipe);
/* Client transport */
-EXPORT_SYMBOL(xprt_create_proto);
EXPORT_SYMBOL(xprt_set_timeout);
/* Client credential cache */
#include <linux/unistd.h>
#include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/xprt.h>
-#include <linux/sunrpc/timer.h>
#define RPC_RTO_MAX (60*HZ)
#define RPC_RTO_INIT (HZ/5)
dprintk("RPC: %4d xprt_connect xprt %p %s connected\n", task->tk_pid,
xprt, (xprt_connected(xprt) ? "is" : "is not"));
- if (!xprt->addr.sin_port) {
+ if (!xprt_bound(xprt)) {
task->tk_status = -EIO;
return;
}
task->tk_pid, -task->tk_status, task->tk_client->cl_server);
xprt_release_write(xprt, task);
task->tk_status = -EIO;
- return;
- }
-
- /* if soft mounted, just cause this RPC to fail */
- if (RPC_IS_SOFT(task)) {
- xprt_release_write(xprt, task);
- task->tk_status = -EIO;
}
}
req->rq_bufsize = 0;
req->rq_xid = xprt_alloc_xid(xprt);
req->rq_release_snd_buf = NULL;
+ xprt_reset_majortimeo(req);
dprintk("RPC: %4d reserved req %p xid %08x\n", task->tk_pid,
req, ntohl(req->rq_xid));
}
to->to_exponential = 0;
}
-static struct rpc_xprt *xprt_setup(int proto, struct sockaddr_in *ap, struct rpc_timeout *to)
+/**
+ * xprt_create_transport - create an RPC transport
+ * @proto: requested transport protocol
+ * @ap: remote peer address
+ * @size: length of address
+ * @to: timeout parameters
+ *
+ */
+struct rpc_xprt *xprt_create_transport(int proto, struct sockaddr *ap, size_t size, struct rpc_timeout *to)
{
int result;
struct rpc_xprt *xprt;
struct rpc_rqst *req;
- if ((xprt = kzalloc(sizeof(struct rpc_xprt), GFP_KERNEL)) == NULL)
+ if ((xprt = kzalloc(sizeof(struct rpc_xprt), GFP_KERNEL)) == NULL) {
+ dprintk("RPC: xprt_create_transport: no memory\n");
return ERR_PTR(-ENOMEM);
-
- xprt->addr = *ap;
+ }
+ if (size <= sizeof(xprt->addr)) {
+ memcpy(&xprt->addr, ap, size);
+ xprt->addrlen = size;
+ } else {
+ kfree(xprt);
+ dprintk("RPC: xprt_create_transport: address too large\n");
+ return ERR_PTR(-EBADF);
+ }
switch (proto) {
case IPPROTO_UDP:
default:
printk(KERN_ERR "RPC: unrecognized transport protocol: %d\n",
proto);
- result = -EIO;
- break;
+ return ERR_PTR(-EIO);
}
if (result) {
kfree(xprt);
+ dprintk("RPC: xprt_create_transport: failed, %d\n", result);
return ERR_PTR(result);
}
+ kref_init(&xprt->kref);
spin_lock_init(&xprt->transport_lock);
spin_lock_init(&xprt->reserve_lock);
xprt->last_used = jiffies;
xprt->cwnd = RPC_INITCWND;
+ rpc_init_wait_queue(&xprt->binding, "xprt_binding");
rpc_init_wait_queue(&xprt->pending, "xprt_pending");
rpc_init_wait_queue(&xprt->sending, "xprt_sending");
rpc_init_wait_queue(&xprt->resend, "xprt_resend");
dprintk("RPC: created transport %p with %u slots\n", xprt,
xprt->max_reqs);
-
- return xprt;
-}
-/**
- * xprt_create_proto - create an RPC client transport
- * @proto: requested transport protocol
- * @sap: remote peer's address
- * @to: timeout parameters for new transport
- *
- */
-struct rpc_xprt *xprt_create_proto(int proto, struct sockaddr_in *sap, struct rpc_timeout *to)
-{
- struct rpc_xprt *xprt;
-
- xprt = xprt_setup(proto, sap, to);
- if (IS_ERR(xprt))
- dprintk("RPC: xprt_create_proto failed\n");
- else
- dprintk("RPC: xprt_create_proto created xprt %p\n", xprt);
return xprt;
}
/**
* xprt_destroy - destroy an RPC transport, killing off all requests.
- * @xprt: transport to destroy
+ * @kref: kref for the transport to destroy
*
*/
-int xprt_destroy(struct rpc_xprt *xprt)
+static void xprt_destroy(struct kref *kref)
{
+ struct rpc_xprt *xprt = container_of(kref, struct rpc_xprt, kref);
+
dprintk("RPC: destroying transport %p\n", xprt);
xprt->shutdown = 1;
del_timer_sync(&xprt->timer);
xprt->ops->destroy(xprt);
kfree(xprt);
+}
- return 0;
+/**
+ * xprt_put - release a reference to an RPC transport.
+ * @xprt: pointer to the transport
+ *
+ */
+void xprt_put(struct rpc_xprt *xprt)
+{
+ kref_put(&xprt->kref, xprt_destroy);
+}
+
+/**
+ * xprt_get - return a reference to an RPC transport.
+ * @xprt: pointer to the transport
+ *
+ */
+struct rpc_xprt *xprt_get(struct rpc_xprt *xprt)
+{
+ kref_get(&xprt->kref);
+ return xprt;
}
}
#endif
+static void xs_format_peer_addresses(struct rpc_xprt *xprt)
+{
+ struct sockaddr_in *addr = (struct sockaddr_in *) &xprt->addr;
+ char *buf;
+
+ buf = kzalloc(20, GFP_KERNEL);
+ if (buf) {
+ snprintf(buf, 20, "%u.%u.%u.%u",
+ NIPQUAD(addr->sin_addr.s_addr));
+ }
+ xprt->address_strings[RPC_DISPLAY_ADDR] = buf;
+
+ buf = kzalloc(8, GFP_KERNEL);
+ if (buf) {
+ snprintf(buf, 8, "%u",
+ ntohs(addr->sin_port));
+ }
+ xprt->address_strings[RPC_DISPLAY_PORT] = buf;
+
+ if (xprt->prot == IPPROTO_UDP)
+ xprt->address_strings[RPC_DISPLAY_PROTO] = "udp";
+ else
+ xprt->address_strings[RPC_DISPLAY_PROTO] = "tcp";
+
+ buf = kzalloc(48, GFP_KERNEL);
+ if (buf) {
+ snprintf(buf, 48, "addr=%u.%u.%u.%u port=%u proto=%s",
+ NIPQUAD(addr->sin_addr.s_addr),
+ ntohs(addr->sin_port),
+ xprt->prot == IPPROTO_UDP ? "udp" : "tcp");
+ }
+ xprt->address_strings[RPC_DISPLAY_ALL] = buf;
+}
+
+static void xs_free_peer_addresses(struct rpc_xprt *xprt)
+{
+ kfree(xprt->address_strings[RPC_DISPLAY_ADDR]);
+ kfree(xprt->address_strings[RPC_DISPLAY_PORT]);
+ kfree(xprt->address_strings[RPC_DISPLAY_ALL]);
+}
+
#define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL)
static inline int xs_send_head(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, unsigned int len)
req->rq_xtime = jiffies;
status = xs_sendpages(xprt->sock, (struct sockaddr *) &xprt->addr,
- sizeof(xprt->addr), xdr, req->rq_bytes_sent);
+ xprt->addrlen, xdr, req->rq_bytes_sent);
dprintk("RPC: xs_udp_send_request(%u) = %d\n",
xdr->len - req->rq_bytes_sent, status);
xprt_disconnect(xprt);
xs_close(xprt);
+ xs_free_peer_addresses(xprt);
kfree(xprt->slot);
}
return rand + xprt_min_resvport;
}
+/**
+ * xs_print_peer_address - format an IPv4 address for printing
+ * @xprt: generic transport
+ * @format: flags field indicating which parts of the address to render
+ */
+static char *xs_print_peer_address(struct rpc_xprt *xprt, enum rpc_display_format_t format)
+{
+ if (xprt->address_strings[format] != NULL)
+ return xprt->address_strings[format];
+ else
+ return "unprintable";
+}
+
/**
* xs_set_port - reset the port number in the remote endpoint address
* @xprt: generic transport
*/
static void xs_set_port(struct rpc_xprt *xprt, unsigned short port)
{
+ struct sockaddr_in *sap = (struct sockaddr_in *) &xprt->addr;
+
dprintk("RPC: setting port for xprt %p to %u\n", xprt, port);
- xprt->addr.sin_port = htons(port);
+
+ sap->sin_port = htons(port);
}
static int xs_bindresvport(struct rpc_xprt *xprt, struct socket *sock)
struct socket *sock = xprt->sock;
int err, status = -EIO;
- if (xprt->shutdown || xprt->addr.sin_port == 0)
+ if (xprt->shutdown || !xprt_bound(xprt))
goto out;
- dprintk("RPC: xs_udp_connect_worker for xprt %p\n", xprt);
-
/* Start by resetting any existing state */
xs_close(xprt);
goto out;
}
+ dprintk("RPC: worker connecting xprt %p to address: %s\n",
+ xprt, xs_print_peer_address(xprt, RPC_DISPLAY_ALL));
+
if (!xprt->inet) {
struct sock *sk = sock->sk;
struct socket *sock = xprt->sock;
int err, status = -EIO;
- if (xprt->shutdown || xprt->addr.sin_port == 0)
+ if (xprt->shutdown || !xprt_bound(xprt))
goto out;
- dprintk("RPC: xs_tcp_connect_worker for xprt %p\n", xprt);
-
if (!xprt->sock) {
/* start from scratch */
if ((err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock)) < 0) {
/* "close" the socket, preserving the local port */
xs_tcp_reuse_connection(xprt);
+ dprintk("RPC: worker connecting xprt %p to address: %s\n",
+ xprt, xs_print_peer_address(xprt, RPC_DISPLAY_ALL));
+
if (!xprt->inet) {
struct sock *sk = sock->sk;
xprt->stat.connect_count++;
xprt->stat.connect_start = jiffies;
status = kernel_connect(sock, (struct sockaddr *) &xprt->addr,
- sizeof(xprt->addr), O_NONBLOCK);
+ xprt->addrlen, O_NONBLOCK);
dprintk("RPC: %p connect status %d connected %d sock state %d\n",
xprt, -status, xprt_connected(xprt), sock->sk->sk_state);
if (status < 0) {
static struct rpc_xprt_ops xs_udp_ops = {
.set_buffer_size = xs_udp_set_buffer_size,
+ .print_addr = xs_print_peer_address,
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong,
+ .rpcbind = rpc_getport,
.set_port = xs_set_port,
.connect = xs_connect,
.buf_alloc = rpc_malloc,
};
static struct rpc_xprt_ops xs_tcp_ops = {
+ .print_addr = xs_print_peer_address,
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xs_tcp_release_xprt,
+ .rpcbind = rpc_getport,
.set_port = xs_set_port,
.connect = xs_connect,
.buf_alloc = rpc_malloc,
int xs_setup_udp(struct rpc_xprt *xprt, struct rpc_timeout *to)
{
size_t slot_table_size;
-
- dprintk("RPC: setting up udp-ipv4 transport...\n");
+ struct sockaddr_in *addr = (struct sockaddr_in *) &xprt->addr;
xprt->max_reqs = xprt_udp_slot_table_entries;
slot_table_size = xprt->max_reqs * sizeof(xprt->slot[0]);
if (xprt->slot == NULL)
return -ENOMEM;
- xprt->prot = IPPROTO_UDP;
+ if (ntohs(addr->sin_port != 0))
+ xprt_set_bound(xprt);
xprt->port = xs_get_random_port();
+
+ xprt->prot = IPPROTO_UDP;
xprt->tsh_size = 0;
- xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
/* XXX: header size can vary due to auth type, IPv6, etc. */
xprt->max_payload = (1U << 16) - (MAX_HEADER << 3);
else
xprt_set_timeout(&xprt->timeout, 5, 5 * HZ);
+ xs_format_peer_addresses(xprt);
+ dprintk("RPC: set up transport to address %s\n",
+ xs_print_peer_address(xprt, RPC_DISPLAY_ALL));
+
return 0;
}
int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to)
{
size_t slot_table_size;
-
- dprintk("RPC: setting up tcp-ipv4 transport...\n");
+ struct sockaddr_in *addr = (struct sockaddr_in *) &xprt->addr;
xprt->max_reqs = xprt_tcp_slot_table_entries;
slot_table_size = xprt->max_reqs * sizeof(xprt->slot[0]);
if (xprt->slot == NULL)
return -ENOMEM;
- xprt->prot = IPPROTO_TCP;
+ if (ntohs(addr->sin_port) != 0)
+ xprt_set_bound(xprt);
xprt->port = xs_get_random_port();
+
+ xprt->prot = IPPROTO_TCP;
xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
- xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
INIT_WORK(&xprt->connect_worker, xs_tcp_connect_worker, xprt);
else
xprt_set_timeout(&xprt->timeout, 2, 60 * HZ);
+ xs_format_peer_addresses(xprt);
+ dprintk("RPC: set up transport to address %s\n",
+ xs_print_peer_address(xprt, RPC_DISPLAY_ALL));
+
return 0;
}
projects / linux-2.6-microblaze.git / commitdiff