--- /dev/null
- nla_strlcpy(name, info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_NAME],
+ // SPDX-License-Identifier: GPL-2.0
+ /*
+ * Witness Service client for CIFS
+ *
+ * Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
+ */
+
+ #include <linux/kref.h>
+ #include <net/genetlink.h>
+ #include <uapi/linux/cifs/cifs_netlink.h>
+
+ #include "cifs_swn.h"
+ #include "cifsglob.h"
+ #include "cifsproto.h"
+ #include "fscache.h"
+ #include "cifs_debug.h"
+ #include "netlink.h"
+
+ static DEFINE_IDR(cifs_swnreg_idr);
+ static DEFINE_MUTEX(cifs_swnreg_idr_mutex);
+
+ struct cifs_swn_reg {
+ int id;
+ struct kref ref_count;
+
+ const char *net_name;
+ const char *share_name;
+ bool net_name_notify;
+ bool share_name_notify;
+ bool ip_notify;
+
+ struct cifs_tcon *tcon;
+ };
+
+ static int cifs_swn_auth_info_krb(struct cifs_tcon *tcon, struct sk_buff *skb)
+ {
+ int ret;
+
+ ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_KRB_AUTH);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+ }
+
+ static int cifs_swn_auth_info_ntlm(struct cifs_tcon *tcon, struct sk_buff *skb)
+ {
+ int ret;
+
+ if (tcon->ses->user_name != NULL) {
+ ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_USER_NAME, tcon->ses->user_name);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (tcon->ses->password != NULL) {
+ ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_PASSWORD, tcon->ses->password);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (tcon->ses->domainName != NULL) {
+ ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_DOMAIN_NAME, tcon->ses->domainName);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+ }
+
+ /*
+ * Sends a register message to the userspace daemon based on the registration.
+ * The authentication information to connect to the witness service is bundled
+ * into the message.
+ */
+ static int cifs_swn_send_register_message(struct cifs_swn_reg *swnreg)
+ {
+ struct sk_buff *skb;
+ struct genlmsghdr *hdr;
+ enum securityEnum authtype;
+ struct sockaddr_storage *addr;
+ int ret;
+
+ skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (skb == NULL) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ hdr = genlmsg_put(skb, 0, 0, &cifs_genl_family, 0, CIFS_GENL_CMD_SWN_REGISTER);
+ if (hdr == NULL) {
+ ret = -ENOMEM;
+ goto nlmsg_fail;
+ }
+
+ ret = nla_put_u32(skb, CIFS_GENL_ATTR_SWN_REGISTRATION_ID, swnreg->id);
+ if (ret < 0)
+ goto nlmsg_fail;
+
+ ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_NET_NAME, swnreg->net_name);
+ if (ret < 0)
+ goto nlmsg_fail;
+
+ ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME, swnreg->share_name);
+ if (ret < 0)
+ goto nlmsg_fail;
+
+ /*
+ * If there is an address stored use it instead of the server address, because we are
+ * in the process of reconnecting to it after a share has been moved or we have been
+ * told to switch to it (client move message). In these cases we unregister from the
+ * server address and register to the new address when we receive the notification.
+ */
+ if (swnreg->tcon->ses->server->use_swn_dstaddr)
+ addr = &swnreg->tcon->ses->server->swn_dstaddr;
+ else
+ addr = &swnreg->tcon->ses->server->dstaddr;
+
+ ret = nla_put(skb, CIFS_GENL_ATTR_SWN_IP, sizeof(struct sockaddr_storage), addr);
+ if (ret < 0)
+ goto nlmsg_fail;
+
+ if (swnreg->net_name_notify) {
+ ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY);
+ if (ret < 0)
+ goto nlmsg_fail;
+ }
+
+ if (swnreg->share_name_notify) {
+ ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY);
+ if (ret < 0)
+ goto nlmsg_fail;
+ }
+
+ if (swnreg->ip_notify) {
+ ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_IP_NOTIFY);
+ if (ret < 0)
+ goto nlmsg_fail;
+ }
+
+ authtype = cifs_select_sectype(swnreg->tcon->ses->server, swnreg->tcon->ses->sectype);
+ switch (authtype) {
+ case Kerberos:
+ ret = cifs_swn_auth_info_krb(swnreg->tcon, skb);
+ if (ret < 0) {
+ cifs_dbg(VFS, "%s: Failed to get kerberos auth info: %d\n", __func__, ret);
+ goto nlmsg_fail;
+ }
+ break;
+ case LANMAN:
+ case NTLM:
+ case NTLMv2:
+ case RawNTLMSSP:
+ ret = cifs_swn_auth_info_ntlm(swnreg->tcon, skb);
+ if (ret < 0) {
+ cifs_dbg(VFS, "%s: Failed to get NTLM auth info: %d\n", __func__, ret);
+ goto nlmsg_fail;
+ }
+ break;
+ default:
+ cifs_dbg(VFS, "%s: secType %d not supported!\n", __func__, authtype);
+ ret = -EINVAL;
+ goto nlmsg_fail;
+ }
+
+ genlmsg_end(skb, hdr);
+ genlmsg_multicast(&cifs_genl_family, skb, 0, CIFS_GENL_MCGRP_SWN, GFP_ATOMIC);
+
+ cifs_dbg(FYI, "%s: Message to register for network name %s with id %d sent\n", __func__,
+ swnreg->net_name, swnreg->id);
+
+ return 0;
+
+ nlmsg_fail:
+ genlmsg_cancel(skb, hdr);
+ nlmsg_free(skb);
+ fail:
+ return ret;
+ }
+
+ /*
+ * Sends an uregister message to the userspace daemon based on the registration
+ */
+ static int cifs_swn_send_unregister_message(struct cifs_swn_reg *swnreg)
+ {
+ struct sk_buff *skb;
+ struct genlmsghdr *hdr;
+ int ret;
+
+ skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(skb, 0, 0, &cifs_genl_family, 0, CIFS_GENL_CMD_SWN_UNREGISTER);
+ if (hdr == NULL) {
+ ret = -ENOMEM;
+ goto nlmsg_fail;
+ }
+
+ ret = nla_put_u32(skb, CIFS_GENL_ATTR_SWN_REGISTRATION_ID, swnreg->id);
+ if (ret < 0)
+ goto nlmsg_fail;
+
+ ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_NET_NAME, swnreg->net_name);
+ if (ret < 0)
+ goto nlmsg_fail;
+
+ ret = nla_put_string(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME, swnreg->share_name);
+ if (ret < 0)
+ goto nlmsg_fail;
+
+ ret = nla_put(skb, CIFS_GENL_ATTR_SWN_IP, sizeof(struct sockaddr_storage),
+ &swnreg->tcon->ses->server->dstaddr);
+ if (ret < 0)
+ goto nlmsg_fail;
+
+ if (swnreg->net_name_notify) {
+ ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY);
+ if (ret < 0)
+ goto nlmsg_fail;
+ }
+
+ if (swnreg->share_name_notify) {
+ ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY);
+ if (ret < 0)
+ goto nlmsg_fail;
+ }
+
+ if (swnreg->ip_notify) {
+ ret = nla_put_flag(skb, CIFS_GENL_ATTR_SWN_IP_NOTIFY);
+ if (ret < 0)
+ goto nlmsg_fail;
+ }
+
+ genlmsg_end(skb, hdr);
+ genlmsg_multicast(&cifs_genl_family, skb, 0, CIFS_GENL_MCGRP_SWN, GFP_ATOMIC);
+
+ cifs_dbg(FYI, "%s: Message to unregister for network name %s with id %d sent\n", __func__,
+ swnreg->net_name, swnreg->id);
+
+ return 0;
+
+ nlmsg_fail:
+ genlmsg_cancel(skb, hdr);
+ nlmsg_free(skb);
+ return ret;
+ }
+
+ /*
+ * Try to find a matching registration for the tcon's server name and share name.
+ * Calls to this funciton must be protected by cifs_swnreg_idr_mutex.
+ * TODO Try to avoid memory allocations
+ */
+ static struct cifs_swn_reg *cifs_find_swn_reg(struct cifs_tcon *tcon)
+ {
+ struct cifs_swn_reg *swnreg;
+ int id;
+ const char *share_name;
+ const char *net_name;
+
+ net_name = extract_hostname(tcon->treeName);
+ if (IS_ERR(net_name)) {
+ int ret;
+
+ ret = PTR_ERR(net_name);
+ cifs_dbg(VFS, "%s: failed to extract host name from target '%s': %d\n",
+ __func__, tcon->treeName, ret);
+ return ERR_PTR(-EINVAL);
+ }
+
+ share_name = extract_sharename(tcon->treeName);
+ if (IS_ERR(share_name)) {
+ int ret;
+
+ ret = PTR_ERR(net_name);
+ cifs_dbg(VFS, "%s: failed to extract share name from target '%s': %d\n",
+ __func__, tcon->treeName, ret);
+ kfree(net_name);
+ return ERR_PTR(-EINVAL);
+ }
+
+ idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) {
+ if (strcasecmp(swnreg->net_name, net_name) != 0
+ || strcasecmp(swnreg->share_name, share_name) != 0) {
+ continue;
+ }
+
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+
+ cifs_dbg(FYI, "Existing swn registration for %s:%s found\n", swnreg->net_name,
+ swnreg->share_name);
+
+ kfree(net_name);
+ kfree(share_name);
+
+ return swnreg;
+ }
+
+ kfree(net_name);
+ kfree(share_name);
+
+ return ERR_PTR(-EEXIST);
+ }
+
+ /*
+ * Get a registration for the tcon's server and share name, allocating a new one if it does not
+ * exists
+ */
+ static struct cifs_swn_reg *cifs_get_swn_reg(struct cifs_tcon *tcon)
+ {
+ struct cifs_swn_reg *reg = NULL;
+ int ret;
+
+ mutex_lock(&cifs_swnreg_idr_mutex);
+
+ /* Check if we are already registered for this network and share names */
+ reg = cifs_find_swn_reg(tcon);
+ if (!IS_ERR(reg)) {
+ kref_get(®->ref_count);
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ return reg;
+ } else if (PTR_ERR(reg) != -EEXIST) {
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ return reg;
+ }
+
+ reg = kmalloc(sizeof(struct cifs_swn_reg), GFP_ATOMIC);
+ if (reg == NULL) {
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ kref_init(®->ref_count);
+
+ reg->id = idr_alloc(&cifs_swnreg_idr, reg, 1, 0, GFP_ATOMIC);
+ if (reg->id < 0) {
+ cifs_dbg(FYI, "%s: failed to allocate registration id\n", __func__);
+ ret = reg->id;
+ goto fail;
+ }
+
+ reg->net_name = extract_hostname(tcon->treeName);
+ if (IS_ERR(reg->net_name)) {
+ ret = PTR_ERR(reg->net_name);
+ cifs_dbg(VFS, "%s: failed to extract host name from target: %d\n", __func__, ret);
+ goto fail_idr;
+ }
+
+ reg->share_name = extract_sharename(tcon->treeName);
+ if (IS_ERR(reg->share_name)) {
+ ret = PTR_ERR(reg->share_name);
+ cifs_dbg(VFS, "%s: failed to extract share name from target: %d\n", __func__, ret);
+ goto fail_net_name;
+ }
+
+ reg->net_name_notify = true;
+ reg->share_name_notify = true;
+ reg->ip_notify = (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT);
+
+ reg->tcon = tcon;
+
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+
+ return reg;
+
+ fail_net_name:
+ kfree(reg->net_name);
+ fail_idr:
+ idr_remove(&cifs_swnreg_idr, reg->id);
+ fail:
+ kfree(reg);
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ return ERR_PTR(ret);
+ }
+
+ static void cifs_swn_reg_release(struct kref *ref)
+ {
+ struct cifs_swn_reg *swnreg = container_of(ref, struct cifs_swn_reg, ref_count);
+ int ret;
+
+ ret = cifs_swn_send_unregister_message(swnreg);
+ if (ret < 0)
+ cifs_dbg(VFS, "%s: Failed to send unregister message: %d\n", __func__, ret);
+
+ idr_remove(&cifs_swnreg_idr, swnreg->id);
+ kfree(swnreg->net_name);
+ kfree(swnreg->share_name);
+ kfree(swnreg);
+ }
+
+ static void cifs_put_swn_reg(struct cifs_swn_reg *swnreg)
+ {
+ mutex_lock(&cifs_swnreg_idr_mutex);
+ kref_put(&swnreg->ref_count, cifs_swn_reg_release);
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ }
+
+ static int cifs_swn_resource_state_changed(struct cifs_swn_reg *swnreg, const char *name, int state)
+ {
+ int i;
+
+ switch (state) {
+ case CIFS_SWN_RESOURCE_STATE_UNAVAILABLE:
+ cifs_dbg(FYI, "%s: resource name '%s' become unavailable\n", __func__, name);
+ for (i = 0; i < swnreg->tcon->ses->chan_count; i++) {
+ spin_lock(&GlobalMid_Lock);
+ if (swnreg->tcon->ses->chans[i].server->tcpStatus != CifsExiting)
+ swnreg->tcon->ses->chans[i].server->tcpStatus = CifsNeedReconnect;
+ spin_unlock(&GlobalMid_Lock);
+ }
+ break;
+ case CIFS_SWN_RESOURCE_STATE_AVAILABLE:
+ cifs_dbg(FYI, "%s: resource name '%s' become available\n", __func__, name);
+ for (i = 0; i < swnreg->tcon->ses->chan_count; i++) {
+ spin_lock(&GlobalMid_Lock);
+ if (swnreg->tcon->ses->chans[i].server->tcpStatus != CifsExiting)
+ swnreg->tcon->ses->chans[i].server->tcpStatus = CifsNeedReconnect;
+ spin_unlock(&GlobalMid_Lock);
+ }
+ break;
+ case CIFS_SWN_RESOURCE_STATE_UNKNOWN:
+ cifs_dbg(FYI, "%s: resource name '%s' changed to unknown state\n", __func__, name);
+ break;
+ }
+ return 0;
+ }
+
+ static bool cifs_sockaddr_equal(struct sockaddr_storage *addr1, struct sockaddr_storage *addr2)
+ {
+ if (addr1->ss_family != addr2->ss_family)
+ return false;
+
+ if (addr1->ss_family == AF_INET) {
+ return (memcmp(&((const struct sockaddr_in *)addr1)->sin_addr,
+ &((const struct sockaddr_in *)addr2)->sin_addr,
+ sizeof(struct in_addr)) == 0);
+ }
+
+ if (addr1->ss_family == AF_INET6) {
+ return (memcmp(&((const struct sockaddr_in6 *)addr1)->sin6_addr,
+ &((const struct sockaddr_in6 *)addr2)->sin6_addr,
+ sizeof(struct in6_addr)) == 0);
+ }
+
+ return false;
+ }
+
+ static int cifs_swn_store_swn_addr(const struct sockaddr_storage *new,
+ const struct sockaddr_storage *old,
+ struct sockaddr_storage *dst)
+ {
+ __be16 port;
+
+ if (old->ss_family == AF_INET) {
+ struct sockaddr_in *ipv4 = (struct sockaddr_in *)old;
+
+ port = ipv4->sin_port;
+ }
+
+ if (old->ss_family == AF_INET6) {
+ struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)old;
+
+ port = ipv6->sin6_port;
+ }
+
+ if (new->ss_family == AF_INET) {
+ struct sockaddr_in *ipv4 = (struct sockaddr_in *)new;
+
+ ipv4->sin_port = port;
+ }
+
+ if (new->ss_family == AF_INET6) {
+ struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)new;
+
+ ipv6->sin6_port = port;
+ }
+
+ *dst = *new;
+
+ return 0;
+ }
+
+ static int cifs_swn_reconnect(struct cifs_tcon *tcon, struct sockaddr_storage *addr)
+ {
+ /* Store the reconnect address */
+ mutex_lock(&tcon->ses->server->srv_mutex);
+ if (!cifs_sockaddr_equal(&tcon->ses->server->dstaddr, addr)) {
+ int ret;
+
+ ret = cifs_swn_store_swn_addr(addr, &tcon->ses->server->dstaddr,
+ &tcon->ses->server->swn_dstaddr);
+ if (ret < 0) {
+ cifs_dbg(VFS, "%s: failed to store address: %d\n", __func__, ret);
+ return ret;
+ }
+ tcon->ses->server->use_swn_dstaddr = true;
+
+ /*
+ * Unregister to stop receiving notifications for the old IP address.
+ */
+ ret = cifs_swn_unregister(tcon);
+ if (ret < 0) {
+ cifs_dbg(VFS, "%s: Failed to unregister for witness notifications: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /*
+ * And register to receive notifications for the new IP address now that we have
+ * stored the new address.
+ */
+ ret = cifs_swn_register(tcon);
+ if (ret < 0) {
+ cifs_dbg(VFS, "%s: Failed to register for witness notifications: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ spin_lock(&GlobalMid_Lock);
+ if (tcon->ses->server->tcpStatus != CifsExiting)
+ tcon->ses->server->tcpStatus = CifsNeedReconnect;
+ spin_unlock(&GlobalMid_Lock);
+ }
+ mutex_unlock(&tcon->ses->server->srv_mutex);
+
+ return 0;
+ }
+
+ static int cifs_swn_client_move(struct cifs_swn_reg *swnreg, struct sockaddr_storage *addr)
+ {
+ struct sockaddr_in *ipv4 = (struct sockaddr_in *)addr;
+ struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)addr;
+
+ if (addr->ss_family == AF_INET)
+ cifs_dbg(FYI, "%s: move to %pI4\n", __func__, &ipv4->sin_addr);
+ else if (addr->ss_family == AF_INET6)
+ cifs_dbg(FYI, "%s: move to %pI6\n", __func__, &ipv6->sin6_addr);
+
+ return cifs_swn_reconnect(swnreg->tcon, addr);
+ }
+
+ int cifs_swn_notify(struct sk_buff *skb, struct genl_info *info)
+ {
+ struct cifs_swn_reg *swnreg;
+ char name[256];
+ int type;
+
+ if (info->attrs[CIFS_GENL_ATTR_SWN_REGISTRATION_ID]) {
+ int swnreg_id;
+
+ swnreg_id = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_REGISTRATION_ID]);
+ mutex_lock(&cifs_swnreg_idr_mutex);
+ swnreg = idr_find(&cifs_swnreg_idr, swnreg_id);
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ if (swnreg == NULL) {
+ cifs_dbg(FYI, "%s: registration id %d not found\n", __func__, swnreg_id);
+ return -EINVAL;
+ }
+ } else {
+ cifs_dbg(FYI, "%s: missing registration id attribute\n", __func__);
+ return -EINVAL;
+ }
+
+ if (info->attrs[CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE]) {
+ type = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_NOTIFICATION_TYPE]);
+ } else {
+ cifs_dbg(FYI, "%s: missing notification type attribute\n", __func__);
+ return -EINVAL;
+ }
+
+ switch (type) {
+ case CIFS_SWN_NOTIFICATION_RESOURCE_CHANGE: {
+ int state;
+
+ if (info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_NAME]) {
++ nla_strscpy(name, info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_NAME],
+ sizeof(name));
+ } else {
+ cifs_dbg(FYI, "%s: missing resource name attribute\n", __func__);
+ return -EINVAL;
+ }
+ if (info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_STATE]) {
+ state = nla_get_u32(info->attrs[CIFS_GENL_ATTR_SWN_RESOURCE_STATE]);
+ } else {
+ cifs_dbg(FYI, "%s: missing resource state attribute\n", __func__);
+ return -EINVAL;
+ }
+ return cifs_swn_resource_state_changed(swnreg, name, state);
+ }
+ case CIFS_SWN_NOTIFICATION_CLIENT_MOVE: {
+ struct sockaddr_storage addr;
+
+ if (info->attrs[CIFS_GENL_ATTR_SWN_IP]) {
+ nla_memcpy(&addr, info->attrs[CIFS_GENL_ATTR_SWN_IP], sizeof(addr));
+ } else {
+ cifs_dbg(FYI, "%s: missing IP address attribute\n", __func__);
+ return -EINVAL;
+ }
+ return cifs_swn_client_move(swnreg, &addr);
+ }
+ default:
+ cifs_dbg(FYI, "%s: unknown notification type %d\n", __func__, type);
+ break;
+ }
+
+ return 0;
+ }
+
+ int cifs_swn_register(struct cifs_tcon *tcon)
+ {
+ struct cifs_swn_reg *swnreg;
+ int ret;
+
+ swnreg = cifs_get_swn_reg(tcon);
+ if (IS_ERR(swnreg))
+ return PTR_ERR(swnreg);
+
+ ret = cifs_swn_send_register_message(swnreg);
+ if (ret < 0) {
+ cifs_dbg(VFS, "%s: Failed to send swn register message: %d\n", __func__, ret);
+ /* Do not put the swnreg or return error, the echo task will retry */
+ }
+
+ return 0;
+ }
+
+ int cifs_swn_unregister(struct cifs_tcon *tcon)
+ {
+ struct cifs_swn_reg *swnreg;
+
+ mutex_lock(&cifs_swnreg_idr_mutex);
+
+ swnreg = cifs_find_swn_reg(tcon);
+ if (IS_ERR(swnreg)) {
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ return PTR_ERR(swnreg);
+ }
+
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+
+ cifs_put_swn_reg(swnreg);
+
+ return 0;
+ }
+
+ void cifs_swn_dump(struct seq_file *m)
+ {
+ struct cifs_swn_reg *swnreg;
+ struct sockaddr_in *sa;
+ struct sockaddr_in6 *sa6;
+ int id;
+
+ seq_puts(m, "Witness registrations:");
+
+ mutex_lock(&cifs_swnreg_idr_mutex);
+ idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) {
+ seq_printf(m, "\nId: %u Refs: %u Network name: '%s'%s Share name: '%s'%s Ip address: ",
+ id, kref_read(&swnreg->ref_count),
+ swnreg->net_name, swnreg->net_name_notify ? "(y)" : "(n)",
+ swnreg->share_name, swnreg->share_name_notify ? "(y)" : "(n)");
+ switch (swnreg->tcon->ses->server->dstaddr.ss_family) {
+ case AF_INET:
+ sa = (struct sockaddr_in *) &swnreg->tcon->ses->server->dstaddr;
+ seq_printf(m, "%pI4", &sa->sin_addr.s_addr);
+ break;
+ case AF_INET6:
+ sa6 = (struct sockaddr_in6 *) &swnreg->tcon->ses->server->dstaddr;
+ seq_printf(m, "%pI6", &sa6->sin6_addr.s6_addr);
+ if (sa6->sin6_scope_id)
+ seq_printf(m, "%%%u", sa6->sin6_scope_id);
+ break;
+ default:
+ seq_puts(m, "(unknown)");
+ }
+ seq_printf(m, "%s", swnreg->ip_notify ? "(y)" : "(n)");
+ }
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ seq_puts(m, "\n");
+ }
+
+ void cifs_swn_check(void)
+ {
+ struct cifs_swn_reg *swnreg;
+ int id;
+ int ret;
+
+ mutex_lock(&cifs_swnreg_idr_mutex);
+ idr_for_each_entry(&cifs_swnreg_idr, swnreg, id) {
+ ret = cifs_swn_send_register_message(swnreg);
+ if (ret < 0)
+ cifs_dbg(FYI, "%s: Failed to send register message: %d\n", __func__, ret);
+ }
+ mutex_unlock(&cifs_swnreg_idr_mutex);
+ }
projects / linux-2.6-microblaze.git / commitdiff