1 /* SPDX-License-Identifier: GPL-2.0-or-later */
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #include <linux/compiler.h>
9 #include <linux/kernel.h>
10 #include <linux/ktime.h>
12 #include <linux/pagemap.h>
13 #include <linux/rxrpc.h>
14 #include <linux/key.h>
15 #include <linux/workqueue.h>
16 #include <linux/sched.h>
17 #include <linux/fscache.h>
18 #include <linux/backing-dev.h>
19 #include <linux/uuid.h>
20 #include <linux/mm_types.h>
21 #include <linux/dns_resolver.h>
22 #include <net/net_namespace.h>
23 #include <net/netns/generic.h>
25 #include <net/af_rxrpc.h>
30 #define AFS_CELL_MAX_ADDRS 15
36 * Partial file-locking emulation mode. (The problem being that AFS3 only
37 * allows whole-file locks and no upgrading/downgrading).
41 afs_flock_mode_local, /* Local locking only */
42 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */
43 afs_flock_mode_strict, /* Always get a server lock for a partial lock */
44 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */
47 struct afs_fs_context {
48 bool force; /* T to force cell type */
49 bool autocell; /* T if set auto mount operation */
50 bool dyn_root; /* T if dynamic root */
51 bool no_cell; /* T if the source is "none" (for dynroot) */
52 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */
53 afs_voltype_t type; /* type of volume requested */
54 unsigned int volnamesz; /* size of volume name */
55 const char *volname; /* name of volume to mount */
56 struct afs_net *net; /* the AFS net namespace stuff */
57 struct afs_cell *cell; /* cell in which to find volume */
58 struct afs_volume *volume; /* volume record */
59 struct key *key; /* key to use for secure mounting */
63 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */
64 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */
65 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */
66 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */
67 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */
68 AFS_CALL_SV_REPLYING, /* Server: Replying */
69 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */
70 AFS_CALL_COMPLETE, /* Completed or failed */
74 * List of server addresses.
76 struct afs_addr_list {
79 u32 version; /* Version */
80 unsigned char max_addrs;
81 unsigned char nr_addrs;
82 unsigned char preferred; /* Preferred address */
83 unsigned char nr_ipv4; /* Number of IPv4 addresses */
84 enum dns_record_source source:8;
85 enum dns_lookup_status status:8;
86 unsigned long failed; /* Mask of addrs that failed locally/ICMP */
87 unsigned long responded; /* Mask of addrs that responded */
88 struct sockaddr_rxrpc addrs[];
89 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
93 * a record of an in-progress RxRPC call
96 const struct afs_call_type *type; /* type of call */
97 struct afs_addr_list *alist; /* Address is alist[addr_ix] */
98 wait_queue_head_t waitq; /* processes awaiting completion */
99 struct work_struct async_work; /* async I/O processor */
100 struct work_struct work; /* actual work processor */
101 struct rxrpc_call *rxcall; /* RxRPC call handle */
102 struct key *key; /* security for this call */
103 struct afs_net *net; /* The network namespace */
104 struct afs_server *server; /* The fileserver record if fs op (pins ref) */
105 struct afs_vlserver *vlserver; /* The vlserver record if vl op */
106 void *request; /* request data (first part) */
107 struct iov_iter def_iter; /* Default buffer/data iterator */
108 struct iov_iter *iter; /* Iterator currently in use */
109 union { /* Convenience for ->def_iter */
111 struct bio_vec bvec[1];
113 void *buffer; /* reply receive buffer */
115 long ret0; /* Value to reply with instead of 0 */
116 struct afs_addr_list *ret_alist;
117 struct afs_vldb_entry *ret_vldb;
120 struct afs_operation *op;
121 unsigned int server_index;
123 enum afs_call_state state;
124 spinlock_t state_lock;
125 int error; /* error code */
126 u32 abort_code; /* Remote abort ID or 0 */
127 unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */
128 unsigned request_size; /* size of request data */
129 unsigned reply_max; /* maximum size of reply */
130 unsigned count2; /* count used in unmarshalling */
131 unsigned char unmarshall; /* unmarshalling phase */
132 unsigned char addr_ix; /* Address in ->alist */
133 bool drop_ref; /* T if need to drop ref for incoming call */
134 bool send_pages; /* T if data from mapping should be sent */
135 bool need_attention; /* T if RxRPC poked us */
136 bool async; /* T if asynchronous */
137 bool upgrade; /* T to request service upgrade */
138 bool have_reply_time; /* T if have got reply_time */
139 bool intr; /* T if interruptible */
140 bool unmarshalling_error; /* T if an unmarshalling error occurred */
141 u16 service_id; /* Actual service ID (after upgrade) */
142 unsigned int debug_id; /* Trace ID */
143 u32 operation_ID; /* operation ID for an incoming call */
144 u32 count; /* count for use in unmarshalling */
145 union { /* place to extract temporary data */
149 } __attribute__((packed));
152 ktime_t reply_time; /* Time of first reply packet */
155 struct afs_call_type {
157 unsigned int op; /* Really enum afs_fs_operation */
159 /* deliver request or reply data to an call
160 * - returning an error will cause the call to be aborted
162 int (*deliver)(struct afs_call *call);
164 /* clean up a call */
165 void (*destructor)(struct afs_call *call);
168 void (*work)(struct work_struct *work);
170 /* Call done function (gets called immediately on success or failure) */
171 void (*done)(struct afs_call *call);
175 * Key available for writeback on a file.
180 struct list_head vnode_link; /* Link in vnode->wb_keys */
184 * AFS open file information record. Pointed to by file->private_data.
187 struct key *key; /* The key this file was opened with */
188 struct afs_wb_key *wb; /* Writeback key record for this file */
191 static inline struct key *afs_file_key(struct file *file)
193 struct afs_file *af = file->private_data;
199 * Record of an outstanding read operation on a vnode.
202 loff_t pos; /* Where to start reading */
203 loff_t len; /* How much we're asking for */
204 loff_t actual_len; /* How much we're actually getting */
205 loff_t remain; /* Amount remaining */
206 loff_t file_size; /* File size returned by server */
207 afs_dataversion_t data_version; /* Version number returned by server */
209 unsigned int index; /* Which page we're reading into */
210 unsigned int nr_pages;
211 unsigned int offset; /* offset into current page */
212 struct afs_vnode *vnode;
213 void (*page_done)(struct afs_read *);
215 struct page *array[];
219 * AFS superblock private data
220 * - there's one superblock per volume
222 struct afs_super_info {
223 struct net *net_ns; /* Network namespace */
224 struct afs_cell *cell; /* The cell in which the volume resides */
225 struct afs_volume *volume; /* volume record */
226 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
227 bool dyn_root; /* True if dynamic root */
230 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
232 return sb->s_fs_info;
235 extern struct file_system_type afs_fs_type;
238 * Set of substitutes for @sys.
240 struct afs_sysnames {
241 #define AFS_NR_SYSNAME 16
242 char *subs[AFS_NR_SYSNAME];
249 * AFS network namespace record.
252 struct net *net; /* Backpointer to the owning net namespace */
253 struct afs_uuid uuid;
254 bool live; /* F if this namespace is being removed */
256 /* AF_RXRPC I/O stuff */
257 struct socket *socket;
258 struct afs_call *spare_incoming_call;
259 struct work_struct charge_preallocation_work;
260 struct mutex socket_mutex;
261 atomic_t nr_outstanding_calls;
262 atomic_t nr_superblocks;
265 struct rb_root cells;
266 struct afs_cell *ws_cell;
267 struct work_struct cells_manager;
268 struct timer_list cells_timer;
269 atomic_t cells_outstanding;
270 struct rw_semaphore cells_lock;
271 struct mutex cells_alias_lock;
273 struct mutex proc_cells_lock;
274 struct hlist_head proc_cells;
276 /* Known servers. Theoretically each fileserver can only be in one
277 * cell, but in practice, people create aliases and subsets and there's
278 * no easy way to distinguish them.
280 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */
281 struct rb_root fs_servers; /* afs_server (by server UUID or address) */
282 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */
283 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */
284 struct hlist_head fs_proc; /* procfs servers list */
286 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
287 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
288 seqlock_t fs_addr_lock; /* For fs_addresses[46] */
290 struct work_struct fs_manager;
291 struct timer_list fs_timer;
293 struct work_struct fs_prober;
294 struct timer_list fs_probe_timer;
295 atomic_t servers_outstanding;
297 /* File locking renewal management */
298 struct mutex lock_manager_mutex;
301 struct super_block *dynroot_sb; /* Dynamic root mount superblock */
302 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
303 struct afs_sysnames *sysnames;
304 rwlock_t sysnames_lock;
306 /* Statistics counters */
307 atomic_t n_lookup; /* Number of lookups done */
308 atomic_t n_reval; /* Number of dentries needing revalidation */
309 atomic_t n_inval; /* Number of invalidations by the server */
310 atomic_t n_relpg; /* Number of invalidations by releasepage */
311 atomic_t n_read_dir; /* Number of directory pages read */
312 atomic_t n_dir_cr; /* Number of directory entry creation edits */
313 atomic_t n_dir_rm; /* Number of directory entry removal edits */
314 atomic_t n_stores; /* Number of store ops */
315 atomic_long_t n_store_bytes; /* Number of bytes stored */
316 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
317 atomic_t n_fetches; /* Number of data fetch ops */
320 extern const char afs_init_sysname[];
322 enum afs_cell_state {
326 AFS_CELL_DEACTIVATING,
335 * This is a tricky concept to get right as it is possible to create aliases
336 * simply by pointing AFSDB/SRV records for two names at the same set of VL
337 * servers; it is also possible to do things like setting up two sets of VL
338 * servers, one of which provides a superset of the volumes provided by the
339 * other (for internal/external division, for example).
341 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
342 * servers and (b) a cell's name is used by the client to select the key to use
343 * for authentication and encryption. The cell name is not typically used in
346 * Two cells are determined to be aliases if they have an explicit alias (YFS
347 * only), share any VL servers in common or have at least one volume in common.
348 * "In common" means that the address list of the VL servers or the fileservers
349 * share at least one endpoint.
354 struct rb_node net_node; /* Node in net->cells */
357 struct afs_cell *alias_of; /* The cell this is an alias of */
358 struct afs_volume *root_volume; /* The root.cell volume if there is one */
359 struct key *anonymous_key; /* anonymous user key for this cell */
360 struct work_struct manager; /* Manager for init/deinit/dns */
361 struct hlist_node proc_link; /* /proc cell list link */
362 #ifdef CONFIG_AFS_FSCACHE
363 struct fscache_cookie *cache; /* caching cookie */
365 time64_t dns_expiry; /* Time AFSDB/SRV record expires */
366 time64_t last_inactive; /* Time of last drop of usage count */
367 atomic_t ref; /* Struct refcount */
368 atomic_t active; /* Active usage counter */
370 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */
371 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */
372 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */
373 enum afs_cell_state state;
375 enum dns_record_source dns_source:8; /* Latest source of data from lookup */
376 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */
377 unsigned int dns_lookup_count; /* Counter of DNS lookups */
378 unsigned int debug_id;
380 /* The volumes belonging to this cell */
381 struct rb_root volumes; /* Tree of volumes on this server */
382 struct hlist_head proc_volumes; /* procfs volume list */
383 seqlock_t volume_lock; /* For volumes */
385 /* Active fileserver interaction state. */
386 struct rb_root fs_servers; /* afs_server (by server UUID) */
387 seqlock_t fs_lock; /* For fs_servers */
389 /* VL server list. */
390 rwlock_t vl_servers_lock; /* Lock on vl_servers */
391 struct afs_vlserver_list __rcu *vl_servers;
393 u8 name_len; /* Length of name */
394 char *name; /* Cell name, case-flattened and NUL-padded */
398 * Volume Location server record.
400 struct afs_vlserver {
402 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */
404 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
405 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
406 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
407 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */
408 rwlock_t lock; /* Lock on addresses */
410 unsigned int rtt; /* Server's current RTT in uS */
413 wait_queue_head_t probe_wq;
414 atomic_t probe_outstanding;
415 spinlock_t probe_lock;
417 unsigned int rtt; /* RTT in uS */
420 unsigned short flags;
421 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */
422 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */
423 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */
424 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */
428 u16 name_len; /* Length of name */
429 char name[]; /* Server name, case-flattened */
433 * Weighted list of Volume Location servers.
435 struct afs_vlserver_entry {
436 u16 priority; /* Preference (as SRV) */
437 u16 weight; /* Weight (as SRV) */
438 enum dns_record_source source:8;
439 enum dns_lookup_status status:8;
440 struct afs_vlserver *server;
443 struct afs_vlserver_list {
447 u8 index; /* Server currently in use */
448 u8 preferred; /* Preferred server */
449 enum dns_record_source source:8;
450 enum dns_lookup_status status:8;
452 struct afs_vlserver_entry servers[];
458 * This is pointed to by cell->vldb_entries, indexed by name.
460 struct afs_vldb_entry {
461 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
464 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
465 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
466 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
467 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
468 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
470 uuid_t fs_server[AFS_NMAXNSERVERS];
471 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */
472 u8 fs_mask[AFS_NMAXNSERVERS];
473 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
474 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
475 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
477 u8 nr_servers; /* Number of server records */
479 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
483 * Record of fileserver with which we're actively communicating.
488 uuid_t uuid; /* Server ID */
489 struct afs_uuid _uuid;
492 struct afs_addr_list __rcu *addresses;
493 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
494 struct rb_node uuid_rb; /* Link in net->fs_servers */
495 struct afs_server __rcu *uuid_next; /* Next server with same UUID */
496 struct afs_server *uuid_prev; /* Previous server with same UUID */
497 struct list_head probe_link; /* Link in net->fs_probe_list */
498 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
499 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
500 struct hlist_node proc_link; /* Link in net->fs_proc */
501 struct afs_server *gc_next; /* Next server in manager's list */
502 time64_t unuse_time; /* Time at which last unused */
504 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */
505 #define AFS_SERVER_FL_UPDATING 1
506 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */
507 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */
508 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */
509 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */
510 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
511 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */
512 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */
513 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */
514 atomic_t ref; /* Object refcount */
515 atomic_t active; /* Active user count */
516 u32 addr_version; /* Address list version */
517 unsigned int rtt; /* Server's current RTT in uS */
518 unsigned int debug_id; /* Debugging ID for traces */
520 /* file service access */
521 rwlock_t fs_lock; /* access lock */
523 /* callback promise management */
524 unsigned cb_s_break; /* Break-everything counter. */
527 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */
528 wait_queue_head_t probe_wq;
529 atomic_t probe_outstanding;
530 spinlock_t probe_lock;
532 unsigned int rtt; /* RTT in uS */
538 bool local_failure:1;
543 * Replaceable volume server list.
545 struct afs_server_entry {
546 struct afs_server *server;
549 struct afs_server_list {
550 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */
552 unsigned char nr_servers;
553 unsigned char preferred; /* Preferred server */
554 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
555 unsigned int seq; /* Set to ->servers_seq when installed */
557 struct afs_server_entry servers[];
561 * Live AFS volume management.
566 afs_volid_t vid; /* volume ID */
569 time64_t update_at; /* Time at which to next update */
570 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
571 struct rb_node cell_node; /* Link in cell->volumes */
572 struct hlist_node proc_link; /* Link in cell->proc_volumes */
573 struct super_block __rcu *sb; /* Superblock on which inodes reside */
575 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */
576 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */
577 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */
578 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */
579 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */
580 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */
581 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */
582 #ifdef CONFIG_AFS_FSCACHE
583 struct fscache_cookie *cache; /* caching cookie */
585 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */
586 rwlock_t servers_lock; /* Lock for ->servers */
587 unsigned int servers_seq; /* Incremented each time ->servers changes */
589 unsigned cb_v_break; /* Break-everything counter. */
590 rwlock_t cb_v_break_lock;
592 afs_voltype_t type; /* type of volume */
593 char type_force; /* force volume type (suppress R/O -> R/W) */
595 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
598 enum afs_lock_state {
599 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */
600 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */
601 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */
602 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */
603 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */
604 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */
605 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */
606 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */
610 * AFS inode private data.
612 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
613 * leak from one inode to another.
616 struct inode vfs_inode; /* the VFS's inode record */
618 struct afs_volume *volume; /* volume on which vnode resides */
619 struct afs_fid fid; /* the file identifier for this inode */
620 struct afs_file_status status; /* AFS status info for this file */
621 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */
622 #ifdef CONFIG_AFS_FSCACHE
623 struct fscache_cookie *cache; /* caching cookie */
625 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
626 struct mutex io_lock; /* Lock for serialising I/O on this mutex */
627 struct rw_semaphore validate_lock; /* lock for validating this vnode */
628 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */
629 struct key *silly_key; /* Silly rename key */
630 spinlock_t wb_lock; /* lock for wb_keys */
631 spinlock_t lock; /* waitqueue/flags lock */
633 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */
634 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
635 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */
636 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
637 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
638 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
639 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */
640 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */
641 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
642 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */
644 struct list_head wb_keys; /* List of keys available for writeback */
645 struct list_head pending_locks; /* locks waiting to be granted */
646 struct list_head granted_locks; /* locks granted on this file */
647 struct delayed_work lock_work; /* work to be done in locking */
648 struct key *lock_key; /* Key to be used in lock ops */
649 ktime_t locked_at; /* Time at which lock obtained */
650 enum afs_lock_state lock_state : 8;
651 afs_lock_type_t lock_type : 8;
653 /* outstanding callback notification on this file */
654 void *cb_server; /* Server with callback/filelock */
655 unsigned int cb_s_break; /* Mass break counter on ->server */
656 unsigned int cb_v_break; /* Mass break counter on ->volume */
657 unsigned int cb_break; /* Break counter on vnode */
658 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */
660 time64_t cb_expires_at; /* time at which callback expires */
663 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
665 #ifdef CONFIG_AFS_FSCACHE
673 * cached security record for one user's attempt to access a vnode
676 struct key *key; /* RxRPC ticket holding a security context */
677 afs_access_t access; /* CallerAccess value for this key */
681 * Immutable cache of CallerAccess records from attempts to access vnodes.
682 * These may be shared between multiple vnodes.
686 struct hlist_node hash_node; /* Link in hash */
687 unsigned long h; /* Hash value for this permit list */
689 unsigned short nr_permits; /* Number of records */
690 bool invalidated; /* Invalidated due to key change */
691 struct afs_permit permits[]; /* List of permits sorted by key pointer */
695 * Error prioritisation and accumulation.
698 short error; /* Accumulated error */
699 bool responded; /* T if server responded */
703 * Cursor for iterating over a server's address list.
705 struct afs_addr_cursor {
706 struct afs_addr_list *alist; /* Current address list (pins ref) */
707 unsigned long tried; /* Tried addresses */
708 signed char index; /* Current address */
709 bool responded; /* T if the current address responded */
710 unsigned short nr_iterations; /* Number of address iterations */
716 * Cursor for iterating over a set of volume location servers.
718 struct afs_vl_cursor {
719 struct afs_addr_cursor ac;
720 struct afs_cell *cell; /* The cell we're querying */
721 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */
722 struct afs_vlserver *server; /* Server on which this resides */
723 struct key *key; /* Key for the server */
724 unsigned long untried; /* Bitmask of untried servers */
725 short index; /* Current server */
727 unsigned short flags;
728 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
729 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
730 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
731 unsigned short nr_iterations; /* Number of server iterations */
735 * Fileserver operation methods.
737 struct afs_operation_ops {
738 void (*issue_afs_rpc)(struct afs_operation *op);
739 void (*issue_yfs_rpc)(struct afs_operation *op);
740 void (*success)(struct afs_operation *op);
741 void (*aborted)(struct afs_operation *op);
742 void (*edit_dir)(struct afs_operation *op);
743 void (*put)(struct afs_operation *op);
746 struct afs_vnode_param {
747 struct afs_vnode *vnode;
748 struct afs_fid fid; /* Fid to access */
749 struct afs_status_cb scb; /* Returned status and callback promise */
750 afs_dataversion_t dv_before; /* Data version before the call */
751 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */
752 u8 dv_delta; /* Expected change in data version */
753 bool put_vnode:1; /* T if we have a ref on the vnode */
754 bool need_io_lock:1; /* T if we need the I/O lock on this */
755 bool update_ctime:1; /* Need to update the ctime */
756 bool set_size:1; /* Must update i_size */
757 bool op_unlinked:1; /* True if file was unlinked by op */
761 * Fileserver operation wrapper, handling server and address rotation
762 * asynchronously. May make simultaneous calls to multiple servers.
764 struct afs_operation {
765 struct afs_net *net; /* Network namespace */
766 struct key *key; /* Key for the cell */
767 const struct afs_call_type *type; /* Type of call done */
768 const struct afs_operation_ops *ops;
770 /* Parameters/results for the operation */
771 struct afs_volume *volume; /* Volume being accessed */
772 struct afs_vnode_param file[2];
773 struct afs_vnode_param *more_files;
774 struct afs_volsync volsync;
775 struct dentry *dentry; /* Dentry to be altered */
776 struct dentry *dentry_2; /* Second dentry to be altered */
777 struct timespec64 mtime; /* Modification time to record */
778 struct timespec64 ctime; /* Change time to set */
779 short nr_files; /* Number of entries in file[], more_files */
781 unsigned int debug_id;
783 unsigned int cb_v_break; /* Volume break counter before op */
784 unsigned int cb_s_break; /* Server break counter before op */
788 int which; /* Which ->file[] to fetch for */
791 int reason; /* enum afs_edit_dir_reason */
799 struct dentry *rehash;
804 struct afs_read *req;
807 afs_lock_type_t type;
810 struct address_space *mapping; /* Pages being written from */
811 pgoff_t first; /* first page in mapping to deal with */
812 pgoff_t last; /* last page in mapping to deal with */
813 unsigned first_offset; /* offset into mapping[first] */
814 unsigned last_to; /* amount of mapping[last] */
815 bool laundering; /* Laundering page, PG_writeback not set */
822 struct yfs_acl *yacl;
824 struct afs_volume_status vs;
829 /* Fileserver iteration state */
830 struct afs_addr_cursor ac;
831 struct afs_server_list *server_list; /* Current server list (pins ref) */
832 struct afs_server *server; /* Server we're using (ref pinned by server_list) */
833 struct afs_call *call;
834 unsigned long untried; /* Bitmask of untried servers */
835 short index; /* Current server */
836 unsigned short nr_iterations; /* Number of server iterations */
839 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */
840 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */
841 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */
842 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */
843 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
844 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
845 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */
846 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */
847 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */
848 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */
849 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */
850 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */
851 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */
855 * Cache auxiliary data.
857 struct afs_vnode_cache_aux {
862 * We use page->private to hold the amount of the page that we've written to,
863 * splitting the field into two parts. However, we need to represent a range
864 * 0...PAGE_SIZE, so we reduce the resolution if the size of the page
865 * exceeds what we can encode.
868 #define __AFS_PAGE_PRIV_MASK 0x7fffffffUL
869 #define __AFS_PAGE_PRIV_SHIFT 32
870 #define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL
872 #define __AFS_PAGE_PRIV_MASK 0x7fffUL
873 #define __AFS_PAGE_PRIV_SHIFT 16
874 #define __AFS_PAGE_PRIV_MMAPPED 0x8000UL
877 static inline unsigned int afs_page_dirty_resolution(void)
879 int shift = PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
880 return (shift > 0) ? shift : 0;
883 static inline size_t afs_page_dirty_from(unsigned long priv)
885 unsigned long x = priv & __AFS_PAGE_PRIV_MASK;
887 /* The lower bound is inclusive */
888 return x << afs_page_dirty_resolution();
891 static inline size_t afs_page_dirty_to(unsigned long priv)
893 unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK;
895 /* The upper bound is immediately beyond the region */
896 return (x + 1) << afs_page_dirty_resolution();
899 static inline unsigned long afs_page_dirty(size_t from, size_t to)
901 unsigned int res = afs_page_dirty_resolution();
903 to = (to - 1) >> res;
904 return (to << __AFS_PAGE_PRIV_SHIFT) | from;
907 static inline unsigned long afs_page_dirty_mmapped(unsigned long priv)
909 return priv | __AFS_PAGE_PRIV_MMAPPED;
912 static inline bool afs_is_page_dirty_mmapped(unsigned long priv)
914 return priv & __AFS_PAGE_PRIV_MMAPPED;
917 #include <trace/events/afs.h>
919 /*****************************************************************************/
923 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
926 refcount_inc(&alist->usage);
929 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
932 extern void afs_put_addrlist(struct afs_addr_list *);
933 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
934 const char *, size_t, char,
935 unsigned short, unsigned short);
936 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
937 extern bool afs_iterate_addresses(struct afs_addr_cursor *);
938 extern int afs_end_cursor(struct afs_addr_cursor *);
940 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
941 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
946 #ifdef CONFIG_AFS_FSCACHE
947 extern struct fscache_netfs afs_cache_netfs;
948 extern struct fscache_cookie_def afs_cell_cache_index_def;
949 extern struct fscache_cookie_def afs_volume_cache_index_def;
950 extern struct fscache_cookie_def afs_vnode_cache_index_def;
952 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
953 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
954 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
960 extern void afs_init_callback_state(struct afs_server *);
961 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
962 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
963 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *);
965 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
967 return vnode->cb_break + vnode->cb_v_break;
970 static inline bool afs_cb_is_broken(unsigned int cb_break,
971 const struct afs_vnode *vnode)
973 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break);
979 extern int afs_cell_init(struct afs_net *, const char *);
980 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned,
981 enum afs_cell_trace);
982 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
984 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace);
985 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace);
986 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace);
987 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace);
988 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace);
989 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace);
990 extern void afs_manage_cells(struct work_struct *);
991 extern void afs_cells_timer(struct timer_list *);
992 extern void __net_exit afs_cell_purge(struct afs_net *);
997 extern bool afs_cm_incoming_call(struct afs_call *);
1002 extern const struct file_operations afs_dir_file_operations;
1003 extern const struct inode_operations afs_dir_inode_operations;
1004 extern const struct address_space_operations afs_dir_aops;
1005 extern const struct dentry_operations afs_fs_dentry_operations;
1007 extern void afs_d_release(struct dentry *);
1008 extern void afs_check_for_remote_deletion(struct afs_operation *);
1013 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
1014 enum afs_edit_dir_reason);
1015 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
1020 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
1021 struct dentry *, struct key *);
1022 extern int afs_silly_iput(struct dentry *, struct inode *);
1027 extern const struct inode_operations afs_dynroot_inode_operations;
1028 extern const struct dentry_operations afs_dynroot_dentry_operations;
1030 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
1031 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
1032 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
1033 extern int afs_dynroot_populate(struct super_block *);
1034 extern void afs_dynroot_depopulate(struct super_block *);
1039 extern const struct address_space_operations afs_fs_aops;
1040 extern const struct inode_operations afs_file_inode_operations;
1041 extern const struct file_operations afs_file_operations;
1043 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
1044 extern void afs_put_wb_key(struct afs_wb_key *);
1045 extern int afs_open(struct inode *, struct file *);
1046 extern int afs_release(struct inode *, struct file *);
1047 extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *);
1048 extern int afs_page_filler(void *, struct page *);
1049 extern void afs_put_read(struct afs_read *);
1051 static inline struct afs_read *afs_get_read(struct afs_read *req)
1053 refcount_inc(&req->usage);
1060 extern struct workqueue_struct *afs_lock_manager;
1062 extern void afs_lock_op_done(struct afs_call *);
1063 extern void afs_lock_work(struct work_struct *);
1064 extern void afs_lock_may_be_available(struct afs_vnode *);
1065 extern int afs_lock(struct file *, int, struct file_lock *);
1066 extern int afs_flock(struct file *, int, struct file_lock *);
1071 extern void afs_fs_fetch_status(struct afs_operation *);
1072 extern void afs_fs_fetch_data(struct afs_operation *);
1073 extern void afs_fs_create_file(struct afs_operation *);
1074 extern void afs_fs_make_dir(struct afs_operation *);
1075 extern void afs_fs_remove_file(struct afs_operation *);
1076 extern void afs_fs_remove_dir(struct afs_operation *);
1077 extern void afs_fs_link(struct afs_operation *);
1078 extern void afs_fs_symlink(struct afs_operation *);
1079 extern void afs_fs_rename(struct afs_operation *);
1080 extern void afs_fs_store_data(struct afs_operation *);
1081 extern void afs_fs_setattr(struct afs_operation *);
1082 extern void afs_fs_get_volume_status(struct afs_operation *);
1083 extern void afs_fs_set_lock(struct afs_operation *);
1084 extern void afs_fs_extend_lock(struct afs_operation *);
1085 extern void afs_fs_release_lock(struct afs_operation *);
1086 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
1087 struct afs_addr_cursor *, struct key *);
1088 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
1089 struct afs_addr_cursor *, struct key *);
1090 extern void afs_fs_inline_bulk_status(struct afs_operation *);
1097 extern void afs_fs_fetch_acl(struct afs_operation *);
1098 extern void afs_fs_store_acl(struct afs_operation *);
1103 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *);
1104 extern int afs_put_operation(struct afs_operation *);
1105 extern bool afs_begin_vnode_operation(struct afs_operation *);
1106 extern void afs_wait_for_operation(struct afs_operation *);
1107 extern int afs_do_sync_operation(struct afs_operation *);
1109 static inline void afs_op_nomem(struct afs_operation *op)
1111 op->error = -ENOMEM;
1114 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n,
1115 struct afs_vnode *vnode)
1117 op->file[n].vnode = vnode;
1118 op->file[n].need_io_lock = true;
1121 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n,
1122 const struct afs_fid *fid)
1124 op->file[n].fid = *fid;
1130 extern void afs_fileserver_probe_result(struct afs_call *);
1131 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool);
1132 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
1133 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *);
1134 extern void afs_fs_probe_dispatcher(struct work_struct *);
1135 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool);
1136 extern void afs_fs_probe_cleanup(struct afs_net *);
1141 extern const struct afs_operation_ops afs_fetch_status_operation;
1143 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *);
1144 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *);
1145 extern int afs_ilookup5_test_by_fid(struct inode *, void *);
1146 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
1147 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *);
1148 extern struct inode *afs_root_iget(struct super_block *, struct key *);
1149 extern bool afs_check_validity(struct afs_vnode *);
1150 extern int afs_validate(struct afs_vnode *, struct key *);
1151 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
1152 extern int afs_setattr(struct dentry *, struct iattr *);
1153 extern void afs_evict_inode(struct inode *);
1154 extern int afs_drop_inode(struct inode *);
1159 extern struct workqueue_struct *afs_wq;
1160 extern int afs_net_id;
1162 static inline struct afs_net *afs_net(struct net *net)
1164 return net_generic(net, afs_net_id);
1167 static inline struct afs_net *afs_sb2net(struct super_block *sb)
1169 return afs_net(AFS_FS_S(sb)->net_ns);
1172 static inline struct afs_net *afs_d2net(struct dentry *dentry)
1174 return afs_sb2net(dentry->d_sb);
1177 static inline struct afs_net *afs_i2net(struct inode *inode)
1179 return afs_sb2net(inode->i_sb);
1182 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
1184 return afs_i2net(&vnode->vfs_inode);
1187 static inline struct afs_net *afs_sock2net(struct sock *sk)
1189 return net_generic(sock_net(sk), afs_net_id);
1192 static inline void __afs_stat(atomic_t *s)
1197 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1202 extern int afs_abort_to_error(u32);
1203 extern void afs_prioritise_error(struct afs_error *, int, u32);
1208 extern const struct inode_operations afs_mntpt_inode_operations;
1209 extern const struct inode_operations afs_autocell_inode_operations;
1210 extern const struct file_operations afs_mntpt_file_operations;
1212 extern struct vfsmount *afs_d_automount(struct path *);
1213 extern void afs_mntpt_kill_timer(void);
1218 #ifdef CONFIG_PROC_FS
1219 extern int __net_init afs_proc_init(struct afs_net *);
1220 extern void __net_exit afs_proc_cleanup(struct afs_net *);
1221 extern int afs_proc_cell_setup(struct afs_cell *);
1222 extern void afs_proc_cell_remove(struct afs_cell *);
1223 extern void afs_put_sysnames(struct afs_sysnames *);
1225 static inline int afs_proc_init(struct afs_net *net) { return 0; }
1226 static inline void afs_proc_cleanup(struct afs_net *net) {}
1227 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
1228 static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
1229 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
1235 extern bool afs_select_fileserver(struct afs_operation *);
1236 extern void afs_dump_edestaddrreq(const struct afs_operation *);
1241 extern struct workqueue_struct *afs_async_calls;
1243 extern int __net_init afs_open_socket(struct afs_net *);
1244 extern void __net_exit afs_close_socket(struct afs_net *);
1245 extern void afs_charge_preallocation(struct work_struct *);
1246 extern void afs_put_call(struct afs_call *);
1247 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
1248 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
1249 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
1250 const struct afs_call_type *,
1252 extern void afs_flat_call_destructor(struct afs_call *);
1253 extern void afs_send_empty_reply(struct afs_call *);
1254 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
1255 extern int afs_extract_data(struct afs_call *, bool);
1256 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause);
1258 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call,
1262 op->type = call->type;
1264 call->key = op->key;
1265 call->intr = !(op->flags & AFS_OPERATION_UNINTR);
1266 afs_make_call(&op->ac, call, gfp);
1269 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
1271 call->kvec[0].iov_base = buf;
1272 call->kvec[0].iov_len = size;
1273 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size);
1276 static inline void afs_extract_to_tmp(struct afs_call *call)
1278 afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
1281 static inline void afs_extract_to_tmp64(struct afs_call *call)
1283 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
1286 static inline void afs_extract_discard(struct afs_call *call, size_t size)
1288 iov_iter_discard(&call->def_iter, READ, size);
1291 static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
1293 afs_extract_begin(call, call->buffer, size);
1296 static inline int afs_transfer_reply(struct afs_call *call)
1298 return afs_extract_data(call, false);
1301 static inline bool afs_check_call_state(struct afs_call *call,
1302 enum afs_call_state state)
1304 return READ_ONCE(call->state) == state;
1307 static inline bool afs_set_call_state(struct afs_call *call,
1308 enum afs_call_state from,
1309 enum afs_call_state to)
1313 spin_lock_bh(&call->state_lock);
1314 if (call->state == from) {
1316 trace_afs_call_state(call, from, to, 0, 0);
1319 spin_unlock_bh(&call->state_lock);
1323 static inline void afs_set_call_complete(struct afs_call *call,
1324 int error, u32 remote_abort)
1326 enum afs_call_state state;
1329 spin_lock_bh(&call->state_lock);
1330 state = call->state;
1331 if (state != AFS_CALL_COMPLETE) {
1332 call->abort_code = remote_abort;
1333 call->error = error;
1334 call->state = AFS_CALL_COMPLETE;
1335 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
1336 error, remote_abort);
1339 spin_unlock_bh(&call->state_lock);
1341 trace_afs_call_done(call);
1343 /* Asynchronous calls have two refs to release - one from the alloc and
1344 * one queued with the work item - and we can't just deallocate the
1345 * call because the work item may be queued again.
1355 extern void afs_put_permits(struct afs_permits *);
1356 extern void afs_clear_permits(struct afs_vnode *);
1357 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
1358 struct afs_status_cb *);
1359 extern void afs_zap_permits(struct rcu_head *);
1360 extern struct key *afs_request_key(struct afs_cell *);
1361 extern struct key *afs_request_key_rcu(struct afs_cell *);
1362 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
1363 extern int afs_permission(struct inode *, int);
1364 extern void __exit afs_clean_up_permit_cache(void);
1369 extern spinlock_t afs_server_peer_lock;
1371 extern struct afs_server *afs_find_server(struct afs_net *,
1372 const struct sockaddr_rxrpc *);
1373 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1374 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32);
1375 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace);
1376 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace);
1377 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1378 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace);
1379 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1380 extern void afs_manage_servers(struct work_struct *);
1381 extern void afs_servers_timer(struct timer_list *);
1382 extern void afs_fs_probe_timer(struct timer_list *);
1383 extern void __net_exit afs_purge_servers(struct afs_net *);
1384 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *);
1386 static inline void afs_inc_servers_outstanding(struct afs_net *net)
1388 atomic_inc(&net->servers_outstanding);
1391 static inline void afs_dec_servers_outstanding(struct afs_net *net)
1393 if (atomic_dec_and_test(&net->servers_outstanding))
1394 wake_up_var(&net->servers_outstanding);
1397 static inline bool afs_is_probing_server(struct afs_server *server)
1399 return list_empty(&server->probe_link);
1405 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1407 refcount_inc(&slist->usage);
1411 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1412 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1413 struct afs_vldb_entry *,
1415 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1420 extern int __init afs_fs_init(void);
1421 extern void afs_fs_exit(void);
1426 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
1428 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
1429 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
1430 struct key *, struct afs_vlserver *, unsigned int);
1431 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
1432 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *);
1437 extern int afs_cell_detect_alias(struct afs_cell *, struct key *);
1442 extern void afs_vlserver_probe_result(struct afs_call *);
1443 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
1444 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
1449 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
1450 struct afs_cell *, struct key *);
1451 extern bool afs_select_vlserver(struct afs_vl_cursor *);
1452 extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
1453 extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
1458 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
1460 atomic_inc(&vlserver->usage);
1464 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
1467 atomic_inc(&vllist->usage);
1471 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
1472 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
1473 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
1474 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
1475 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
1476 const void *, size_t);
1481 extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
1482 extern void afs_activate_volume(struct afs_volume *);
1483 extern void afs_deactivate_volume(struct afs_volume *);
1484 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace);
1485 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace);
1486 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *);
1491 extern int afs_set_page_dirty(struct page *);
1492 extern int afs_write_begin(struct file *file, struct address_space *mapping,
1493 loff_t pos, unsigned len, unsigned flags,
1494 struct page **pagep, void **fsdata);
1495 extern int afs_write_end(struct file *file, struct address_space *mapping,
1496 loff_t pos, unsigned len, unsigned copied,
1497 struct page *page, void *fsdata);
1498 extern int afs_writepage(struct page *, struct writeback_control *);
1499 extern int afs_writepages(struct address_space *, struct writeback_control *);
1500 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1501 extern int afs_fsync(struct file *, loff_t, loff_t, int);
1502 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1503 extern void afs_prune_wb_keys(struct afs_vnode *);
1504 extern int afs_launder_page(struct page *);
1509 extern const struct xattr_handler *afs_xattr_handlers[];
1510 extern ssize_t afs_listxattr(struct dentry *, char *, size_t);
1515 extern void yfs_fs_fetch_data(struct afs_operation *);
1516 extern void yfs_fs_create_file(struct afs_operation *);
1517 extern void yfs_fs_make_dir(struct afs_operation *);
1518 extern void yfs_fs_remove_file2(struct afs_operation *);
1519 extern void yfs_fs_remove_file(struct afs_operation *);
1520 extern void yfs_fs_remove_dir(struct afs_operation *);
1521 extern void yfs_fs_link(struct afs_operation *);
1522 extern void yfs_fs_symlink(struct afs_operation *);
1523 extern void yfs_fs_rename(struct afs_operation *);
1524 extern void yfs_fs_store_data(struct afs_operation *);
1525 extern void yfs_fs_setattr(struct afs_operation *);
1526 extern void yfs_fs_get_volume_status(struct afs_operation *);
1527 extern void yfs_fs_set_lock(struct afs_operation *);
1528 extern void yfs_fs_extend_lock(struct afs_operation *);
1529 extern void yfs_fs_release_lock(struct afs_operation *);
1530 extern void yfs_fs_fetch_status(struct afs_operation *);
1531 extern void yfs_fs_inline_bulk_status(struct afs_operation *);
1534 struct afs_acl *acl; /* Dir/file/symlink ACL */
1535 struct afs_acl *vol_acl; /* Whole volume ACL */
1536 u32 inherit_flag; /* True if ACL is inherited from parent dir */
1537 u32 num_cleaned; /* Number of ACEs removed due to subject removal */
1539 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
1540 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
1543 extern void yfs_free_opaque_acl(struct yfs_acl *);
1544 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *);
1545 extern void yfs_fs_store_opaque_acl2(struct afs_operation *);
1548 * Miscellaneous inline functions.
1550 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1552 return container_of(inode, struct afs_vnode, vfs_inode);
1555 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1557 return &vnode->vfs_inode;
1561 * Note that a dentry got changed. We need to set d_fsdata to the data version
1562 * number derived from the result of the operation. It doesn't matter if
1563 * d_fsdata goes backwards as we'll just revalidate.
1565 static inline void afs_update_dentry_version(struct afs_operation *op,
1566 struct afs_vnode_param *dir_vp,
1567 struct dentry *dentry)
1571 (void *)(unsigned long)dir_vp->scb.status.data_version;
1575 * Check for a conflicting operation on a directory that we just unlinked from.
1576 * If someone managed to sneak a link or an unlink in on the file we just
1577 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS).
1579 static inline void afs_check_dir_conflict(struct afs_operation *op,
1580 struct afs_vnode_param *dvp)
1582 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version)
1583 op->flags |= AFS_OPERATION_DIR_CONFLICT;
1586 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
1588 trace_afs_io_error(call->debug_id, -EIO, where);
1592 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
1594 trace_afs_file_error(vnode, -EIO, where);
1598 /*****************************************************************************/
1602 extern unsigned afs_debug;
1604 #define dbgprintk(FMT,...) \
1605 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1607 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1608 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1609 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1612 #if defined(__KDEBUG)
1613 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1614 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1615 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1617 #elif defined(CONFIG_AFS_DEBUG)
1618 #define AFS_DEBUG_KENTER 0x01
1619 #define AFS_DEBUG_KLEAVE 0x02
1620 #define AFS_DEBUG_KDEBUG 0x04
1622 #define _enter(FMT,...) \
1624 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1625 kenter(FMT,##__VA_ARGS__); \
1628 #define _leave(FMT,...) \
1630 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1631 kleave(FMT,##__VA_ARGS__); \
1634 #define _debug(FMT,...) \
1636 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1637 kdebug(FMT,##__VA_ARGS__); \
1641 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1642 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1643 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1647 * debug assertion checking
1649 #if 1 // defined(__KDEBUGALL)
1653 if (unlikely(!(X))) { \
1654 printk(KERN_ERR "\n"); \
1655 printk(KERN_ERR "AFS: Assertion failed\n"); \
1660 #define ASSERTCMP(X, OP, Y) \
1662 if (unlikely(!((X) OP (Y)))) { \
1663 printk(KERN_ERR "\n"); \
1664 printk(KERN_ERR "AFS: Assertion failed\n"); \
1665 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1666 (unsigned long)(X), (unsigned long)(Y)); \
1667 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1668 (unsigned long)(X), (unsigned long)(Y)); \
1673 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1675 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1676 printk(KERN_ERR "\n"); \
1677 printk(KERN_ERR "AFS: Assertion failed\n"); \
1678 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1679 (unsigned long)(L), (unsigned long)(N), \
1680 (unsigned long)(H)); \
1681 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1682 (unsigned long)(L), (unsigned long)(N), \
1683 (unsigned long)(H)); \
1688 #define ASSERTIF(C, X) \
1690 if (unlikely((C) && !(X))) { \
1691 printk(KERN_ERR "\n"); \
1692 printk(KERN_ERR "AFS: Assertion failed\n"); \
1697 #define ASSERTIFCMP(C, X, OP, Y) \
1699 if (unlikely((C) && !((X) OP (Y)))) { \
1700 printk(KERN_ERR "\n"); \
1701 printk(KERN_ERR "AFS: Assertion failed\n"); \
1702 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1703 (unsigned long)(X), (unsigned long)(Y)); \
1704 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1705 (unsigned long)(X), (unsigned long)(Y)); \
1716 #define ASSERTCMP(X, OP, Y) \
1720 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1724 #define ASSERTIF(C, X) \
1728 #define ASSERTIFCMP(C, X, OP, Y) \
1732 #endif /* __KDEBUGALL */