return;
cifs_dbg(VFS, "Dump pending requests:\n");
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
mid_entry->mid_state,
mid_entry->resp_buf, 62);
}
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
#endif /* CONFIG_CIFS_DEBUG2 */
}
seq_printf(m, "\n\t\t[NONE]");
seq_puts(m, "\n\n\tMIDs: ");
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
seq_printf(m, "\n\tState: %d com: %d pid:"
" %d cbdata: %p mid %llu\n",
mid_entry->callback_data,
mid_entry->mid);
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
seq_printf(m, "\n--\n");
}
if (c == 0)
if ((cifs_pdu == NULL) || (server == NULL))
return -EINVAL;
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (!(cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) ||
server->tcpStatus == CifsNeedNegotiate) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return rc;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
if (!server->session_estab) {
memcpy(cifs_pdu->Signature.SecuritySignature, "BSRSPYL", 8);
tcon = cifs_sb_master_tcon(cifs_sb);
spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if ((tcon->tc_count > 1) || (tcon->status == TID_EXITING)) {
/* we have other mounts to same share or we have
already tried to force umount this and woken up
all waiting network requests, nothing to do */
+ spin_unlock(&tcon->tc_lock);
spin_unlock(&cifs_tcp_ses_lock);
return;
} else if (tcon->tc_count == 1)
tcon->status = TID_EXITING;
+ spin_unlock(&tcon->tc_lock);
spin_unlock(&cifs_tcp_ses_lock);
/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
struct TCP_Server_Info {
struct list_head tcp_ses_list;
struct list_head smb_ses_list;
+ spinlock_t srv_lock; /* protect anything here that is not protected */
__u64 conn_id; /* connection identifier (useful for debugging) */
int srv_count; /* reference counter */
/* 15 character server name + 0x20 16th byte indicating type = srv */
#endif
wait_queue_head_t response_q;
wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
+ spinlock_t mid_lock; /* protect mid queue and it's entries */
struct list_head pending_mid_q;
bool noblocksnd; /* use blocking sendmsg */
bool noautotune; /* do not autotune send buf sizes */
struct list_head rlist; /* reconnect list */
struct list_head tcon_list;
struct cifs_tcon *tcon_ipc;
+ spinlock_t ses_lock; /* protect anything here that is not protected */
struct mutex session_mutex;
struct TCP_Server_Info *server; /* pointer to server info */
int ses_count; /* reference counter */
struct list_head tcon_list;
int tc_count;
struct list_head rlist; /* reconnect list */
+ spinlock_t tc_lock; /* protect anything here that is not protected */
atomic_t num_local_opens; /* num of all opens including disconnected */
atomic_t num_remote_opens; /* num of all network opens on server */
struct list_head openFileList;
*/
/****************************************************************************
- * Locking notes. All updates to global variables and lists should be
- * protected by spinlocks or semaphores.
+ * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according
+ * to the locking order. i.e. if two locks are to be held together, the lock that
+ * appears higher in this list needs to be taken before the other.
*
- * Spinlocks
- * ---------
- * GlobalMid_Lock protects:
- * list operations on pending_mid_q and oplockQ
- * updates to XID counters, multiplex id and SMB sequence numbers
- * list operations on global DnotifyReqList
- * updates to ses->status and TCP_Server_Info->tcpStatus
- * updates to server->CurrentMid
- * tcp_ses_lock protects:
- * list operations on tcp and SMB session lists
- * tcon->open_file_lock protects the list of open files hanging off the tcon
- * inode->open_file_lock protects the openFileList hanging off the inode
- * cfile->file_info_lock protects counters and fields in cifs file struct
- * f_owner.lock protects certain per file struct operations
- * mapping->page_lock protects certain per page operations
+ * If you hold a lock that is lower in this list, and you need to take a higher lock
+ * (or if you think that one of the functions that you're calling may need to), first
+ * drop the lock you hold, pick up the higher lock, then the lower one. This will
+ * ensure that locks are picked up only in one direction in the below table
+ * (top to bottom).
*
- * Note that the cifs_tcon.open_file_lock should be taken before
- * not after the cifsInodeInfo.open_file_lock
+ * Also, if you expect a function to be called with a lock held, explicitly document
+ * this in the comments on top of your function definition.
*
- * Semaphores
- * ----------
- * cifsInodeInfo->lock_sem protects:
- * the list of locks held by the inode
+ * And also, try to keep the critical sections (lock hold time) to be as minimal as
+ * possible. Blocking / calling other functions with a lock held always increase
+ * the risk of a possible deadlock.
*
+ * Following this rule will avoid unnecessary deadlocks, which can get really hard to
+ * debug. Also, any new lock that you introduce, please add to this list in the correct
+ * order.
+ *
+ * Please populate this list whenever you introduce new locks in your changes. Or in
+ * case I've missed some existing locks. Please ensure that it's added in the list
+ * based on the locking order expected.
+ *
+ * =====================================================================================
+ * Lock Protects Initialization fn
+ * =====================================================================================
+ * vol_list_lock
+ * vol_info->ctx_lock vol_info->ctx
+ * cifs_sb_info->tlink_tree_lock cifs_sb_info->tlink_tree cifs_setup_cifs_sb
+ * TCP_Server_Info-> TCP_Server_Info cifs_get_tcp_session
+ * reconnect_mutex
+ * TCP_Server_Info->srv_mutex TCP_Server_Info cifs_get_tcp_session
+ * cifs_ses->session_mutex cifs_ses sesInfoAlloc
+ * cifs_tcon
+ * cifs_tcon->open_file_lock cifs_tcon->openFileList tconInfoAlloc
+ * cifs_tcon->pending_opens
+ * cifs_tcon->stat_lock cifs_tcon->bytes_read tconInfoAlloc
+ * cifs_tcon->bytes_written
+ * cifs_tcp_ses_lock cifs_tcp_ses_list sesInfoAlloc
+ * GlobalMid_Lock GlobalMaxActiveXid init_cifs
+ * GlobalCurrentXid
+ * GlobalTotalActiveXid
+ * TCP_Server_Info->srv_lock (anything in struct not protected by another lock and can change)
+ * TCP_Server_Info->mid_lock TCP_Server_Info->pending_mid_q cifs_get_tcp_session
+ * ->CurrentMid
+ * (any changes in mid_q_entry fields)
+ * TCP_Server_Info->req_lock TCP_Server_Info->in_flight cifs_get_tcp_session
+ * ->credits
+ * ->echo_credits
+ * ->oplock_credits
+ * ->reconnect_instance
+ * cifs_ses->ses_lock (anything that is not protected by another lock and can change)
+ * cifs_ses->iface_lock cifs_ses->iface_list sesInfoAlloc
+ * ->iface_count
+ * ->iface_last_update
+ * cifs_ses->chan_lock cifs_ses->chans
+ * ->chans_need_reconnect
+ * ->chans_in_reconnect
+ * cifs_tcon->tc_lock (anything that is not protected by another lock and can change)
+ * cifsInodeInfo->open_file_lock cifsInodeInfo->openFileList cifs_alloc_inode
+ * cifsInodeInfo->writers_lock cifsInodeInfo->writers cifsInodeInfo_alloc
+ * cifsInodeInfo->lock_sem cifsInodeInfo->llist cifs_init_once
+ * ->can_cache_brlcks
+ * cifsInodeInfo->deferred_lock cifsInodeInfo->deferred_closes cifsInodeInfo_alloc
+ * cached_fid->fid_mutex cifs_tcon->crfid tconInfoAlloc
+ * cifsFileInfo->fh_mutex cifsFileInfo cifs_new_fileinfo
+ * cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo
+ * ->invalidHandle initiate_cifs_search
+ * ->oplock_break_cancelled
+ * cifs_aio_ctx->aio_mutex cifs_aio_ctx cifs_aio_ctx_alloc
****************************************************************************/
#ifdef DECLARE_GLOBALS_HERE
/*
* This lock protects the cifs_tcp_ses_list, the list of smb sessions per
* tcp session, and the list of tcon's per smb session. It also protects
- * the reference counters for the server, smb session, and tcon. It also
- * protects some fields in the TCP_Server_Info struct such as dstaddr. Finally,
- * changes to the tcon->tidStatus should be done while holding this lock.
+ * the reference counters for the server, smb session, and tcon.
* generally the locks should be taken in order tcp_ses_lock before
* tcon->open_file_lock and that before file->file_info_lock since the
* structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
struct list_head *tmp1;
/* only send once per connect */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->ses->ses_lock);
if ((tcon->ses->ses_status != SES_GOOD) || (tcon->status != TID_NEED_RECON)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->ses->ses_lock);
return;
}
tcon->status = TID_IN_FILES_INVALIDATE;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->ses->ses_lock);
/* list all files open on tree connection and mark them invalid */
spin_lock(&tcon->open_file_lock);
memset(tcon->crfid.fid, 0, sizeof(struct cifs_fid));
mutex_unlock(&tcon->crfid.fid_mutex);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->status == TID_IN_FILES_INVALIDATE)
tcon->status = TID_NEED_TCON;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
/*
* BB Add call to invalidate_inodes(sb) for all superblocks mounted
* only tree disconnect, open, and write, (and ulogoff which does not
* have tcon) are allowed as we start force umount
*/
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->status == TID_EXITING) {
if (smb_command != SMB_COM_WRITE_ANDX &&
smb_command != SMB_COM_OPEN_ANDX &&
smb_command != SMB_COM_TREE_DISCONNECT) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
cifs_dbg(FYI, "can not send cmd %d while umounting\n",
smb_command);
return -ENODEV;
}
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
retries = server->nr_targets;
}
/* are we still trying to reconnect? */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus != CifsNeedReconnect) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
break;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
if (retries && --retries)
continue;
* and the server never sends an answer the socket will be closed
* and tcpStatus set to reconnect.
*/
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsNeedReconnect) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
rc = -EHOSTDOWN;
goto out;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
/*
* need to prevent multiple threads trying to simultaneously
goto requeue_resolve;
}
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
rc = cifs_convert_address((struct sockaddr *)&server->dstaddr, ipaddr,
strlen(ipaddr));
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
kfree(ipaddr);
/* rc == 1 means success here */
/* If server is a channel, select the primary channel */
pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server;
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&pserver->srv_lock);
if (!all_channels) {
pserver->tcpStatus = CifsNeedReconnect;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&pserver->srv_lock);
return;
}
+ spin_unlock(&pserver->srv_lock);
+ spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
spin_lock(&ses->chan_lock);
- for (i = 0; i < ses->chan_count; i++)
+ for (i = 0; i < ses->chan_count; i++) {
+ spin_lock(&ses->chans[i].server->srv_lock);
ses->chans[i].server->tcpStatus = CifsNeedReconnect;
+ spin_unlock(&ses->chans[i].server->srv_lock);
+ }
spin_unlock(&ses->chan_lock);
}
spin_unlock(&cifs_tcp_ses_lock);
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry_safe(ses, nses, &pserver->smb_ses_list, smb_ses_list) {
/* check if iface is still active */
- if (!cifs_chan_is_iface_active(ses, server)) {
- /*
- * HACK: drop the lock before calling
- * cifs_chan_update_iface to avoid deadlock
- */
- ses->ses_count++;
- spin_unlock(&cifs_tcp_ses_lock);
+ if (!cifs_chan_is_iface_active(ses, server))
cifs_chan_update_iface(ses, server);
- spin_lock(&cifs_tcp_ses_lock);
- ses->ses_count--;
- }
spin_lock(&ses->chan_lock);
if (!mark_smb_session && cifs_chan_needs_reconnect(ses, server))
/* mark submitted MIDs for retry and issue callback */
INIT_LIST_HEAD(&retry_list);
cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
list_for_each_entry_safe(mid, nmid, &server->pending_mid_q, qhead) {
kref_get(&mid->refcount);
if (mid->mid_state == MID_REQUEST_SUBMITTED)
list_move(&mid->qhead, &retry_list);
mid->mid_flags |= MID_DELETED;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
cifs_server_unlock(server);
cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
static bool cifs_tcp_ses_needs_reconnect(struct TCP_Server_Info *server, int num_targets)
{
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
server->nr_targets = num_targets;
if (server->tcpStatus == CifsExiting) {
/* the demux thread will exit normally next time through the loop */
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
wake_up(&server->response_q);
return false;
}
server->hostname);
server->tcpStatus = CifsNeedReconnect;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return true;
}
} else {
atomic_inc(&tcpSesReconnectCount);
set_credits(server, 1);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus != CifsExiting)
server->tcpStatus = CifsNeedNegotiate;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
cifs_swn_reset_server_dstaddr(server);
cifs_server_unlock(server);
mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
}
} while (server->tcpStatus == CifsNeedReconnect);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsNeedNegotiate)
mod_delayed_work(cifsiod_wq, &server->echo, 0);
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
wake_up(&server->response_q);
return rc;
*/
atomic_inc(&tcpSesReconnectCount);
set_credits(server, 1);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus != CifsExiting)
server->tcpStatus = CifsNeedNegotiate;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
cifs_swn_reset_server_dstaddr(server);
cifs_server_unlock(server);
mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
dfs_cache_free_tgts(&tl);
/* Need to set up echo worker again once connection has been established */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsNeedNegotiate)
mod_delayed_work(cifsiod_wq, &server->echo, 0);
-
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
wake_up(&server->response_q);
return rc;
int cifs_reconnect(struct TCP_Server_Info *server, bool mark_smb_session)
{
/* If tcp session is not an dfs connection, then reconnect to last target server */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (!server->is_dfs_conn) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return __cifs_reconnect(server, mark_smb_session);
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
mutex_lock(&server->refpath_lock);
if (!server->origin_fullpath || !server->leaf_fullpath) {
* 65s kernel_recvmsg times out, and we see that we haven't gotten
* a response in >60s.
*/
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if ((server->tcpStatus == CifsGood ||
server->tcpStatus == CifsNeedNegotiate) &&
(!server->ops->can_echo || server->ops->can_echo(server)) &&
time_after(jiffies, server->lstrp + 3 * server->echo_interval)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
cifs_server_dbg(VFS, "has not responded in %lu seconds. Reconnecting...\n",
(3 * server->echo_interval) / HZ);
cifs_reconnect(server, false);
return true;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return false;
}
else
length = sock_recvmsg(server->ssocket, smb_msg, 0);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsExiting) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return -ESHUTDOWN;
}
if (server->tcpStatus == CifsNeedReconnect) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
cifs_reconnect(server, false);
return -ECONNABORTED;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
if (length == -ERESTARTSYS ||
length == -EAGAIN ||
#ifdef CONFIG_CIFS_STATS2
mid->when_received = jiffies;
#endif
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&mid->server->mid_lock);
if (!malformed)
mid->mid_state = MID_RESPONSE_RECEIVED;
else
* function has finished processing it is a bug.
*/
if (mid->mid_flags & MID_DELETED) {
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&mid->server->mid_lock);
pr_warn_once("trying to dequeue a deleted mid\n");
} else {
list_del_init(&mid->qhead);
mid->mid_flags |= MID_DELETED;
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&mid->server->mid_lock);
}
}
int length;
/* take it off the list, if it's not already */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
list_del_init(&server->tcp_ses_list);
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
cancel_delayed_work_sync(&server->echo);
cancel_delayed_work_sync(&server->resolve);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
server->tcpStatus = CifsExiting;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
wake_up_all(&server->response_q);
/* check if we have blocked requests that need to free */
struct list_head *tmp, *tmp2;
INIT_LIST_HEAD(&dispose_list);
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
cifs_dbg(FYI, "Clearing mid %llu\n", mid_entry->mid);
list_move(&mid_entry->qhead, &dispose_list);
mid_entry->mid_flags |= MID_DELETED;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
/* now walk dispose list and issue callbacks */
list_for_each_safe(tmp, tmp2, &dispose_list) {
return true;
}
+/* this function must be called with srv_lock held */
static int match_server(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
{
struct sockaddr *addr = (struct sockaddr *)&ctx->dstaddr;
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+ spin_lock(&server->srv_lock);
#ifdef CONFIG_CIFS_DFS_UPCALL
/*
* DFS failover implementation in cifs_reconnect() requires unique tcp sessions for
* shares or even links that may connect to same server but having completely
* different failover targets.
*/
- if (server->is_dfs_conn)
+ if (server->is_dfs_conn) {
+ spin_unlock(&server->srv_lock);
continue;
+ }
#endif
/*
* Skip ses channels since they're only handled in lower layers
* (e.g. cifs_send_recv).
*/
- if (CIFS_SERVER_IS_CHAN(server) || !match_server(server, ctx))
+ if (CIFS_SERVER_IS_CHAN(server) || !match_server(server, ctx)) {
+ spin_unlock(&server->srv_lock);
continue;
+ }
+ spin_unlock(&server->srv_lock);
++server->srv_count;
spin_unlock(&cifs_tcp_ses_lock);
else
cancel_delayed_work_sync(&server->reconnect);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
server->tcpStatus = CifsExiting;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
cifs_crypto_secmech_release(server);
if (primary_server) {
spin_lock(&cifs_tcp_ses_lock);
++primary_server->srv_count;
- tcp_ses->primary_server = primary_server;
spin_unlock(&cifs_tcp_ses_lock);
+ tcp_ses->primary_server = primary_server;
}
init_waitqueue_head(&tcp_ses->response_q);
init_waitqueue_head(&tcp_ses->request_q);
tcp_ses->lstrp = jiffies;
tcp_ses->compress_algorithm = cpu_to_le16(ctx->compression);
spin_lock_init(&tcp_ses->req_lock);
+ spin_lock_init(&tcp_ses->srv_lock);
+ spin_lock_init(&tcp_ses->mid_lock);
INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
* to the struct since the kernel thread not created yet
* no need to spinlock this update of tcpStatus
*/
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcp_ses->srv_lock);
tcp_ses->tcpStatus = CifsNeedNegotiate;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcp_ses->srv_lock);
if ((ctx->max_credits < 20) || (ctx->max_credits > 60000))
tcp_ses->max_credits = SMB2_MAX_CREDITS_AVAILABLE;
return ERR_PTR(rc);
}
+/* this function must be called with ses_lock held */
static int match_session(struct cifs_ses *ses, struct smb3_fs_context *ctx)
{
if (ctx->sectype != Unspecified &&
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
- if (ses->ses_status == SES_EXITING)
+ spin_lock(&ses->ses_lock);
+ if (ses->ses_status == SES_EXITING) {
+ spin_unlock(&ses->ses_lock);
continue;
- if (!match_session(ses, ctx))
+ }
+ if (!match_session(ses, ctx)) {
+ spin_unlock(&ses->ses_lock);
continue;
+ }
+ spin_unlock(&ses->ses_lock);
+
++ses->ses_count;
spin_unlock(&cifs_tcp_ses_lock);
return ses;
unsigned int chan_count;
struct TCP_Server_Info *server = ses->server;
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
if (ses->ses_status == SES_EXITING) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
return;
}
+ spin_unlock(&ses->ses_lock);
cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
cifs_dbg(FYI, "%s: ses ipc: %s\n", __func__, ses->tcon_ipc ? ses->tcon_ipc->treeName : "NONE");
+ spin_lock(&cifs_tcp_ses_lock);
if (--ses->ses_count > 0) {
spin_unlock(&cifs_tcp_ses_lock);
return;
}
+ spin_unlock(&cifs_tcp_ses_lock);
/* ses_count can never go negative */
WARN_ON(ses->ses_count < 0);
if (ses->ses_status == SES_GOOD)
ses->ses_status = SES_EXITING;
- spin_unlock(&cifs_tcp_ses_lock);
cifs_free_ipc(ses);
return ERR_PTR(rc);
}
+/* this function must be called with tc_lock held */
static int match_tcon(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
{
if (tcon->status == TID_EXITING)
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
- if (!match_tcon(tcon, ctx))
+ spin_lock(&tcon->tc_lock);
+ if (!match_tcon(tcon, ctx)) {
+ spin_unlock(&tcon->tc_lock);
continue;
+ }
++tcon->tc_count;
+ spin_unlock(&tcon->tc_lock);
spin_unlock(&cifs_tcp_ses_lock);
return tcon;
}
ctx = mnt_data->ctx;
+ spin_lock(&tcp_srv->srv_lock);
+ spin_lock(&ses->ses_lock);
+ spin_lock(&tcon->tc_lock);
if (!match_server(tcp_srv, ctx) ||
!match_session(ses, ctx) ||
!match_tcon(tcon, ctx) ||
rc = compare_mount_options(sb, mnt_data);
out:
+ spin_unlock(&tcon->tc_lock);
+ spin_unlock(&ses->ses_lock);
+ spin_unlock(&tcp_srv->srv_lock);
+
spin_unlock(&cifs_tcp_ses_lock);
cifs_put_tlink(tlink);
return rc;
* for just this mount.
*/
reset_cifs_unix_caps(xid, tcon, cifs_sb, ctx);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->ses->server->srv_lock);
if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
(le64_to_cpu(tcon->fsUnixInfo.Capability) &
CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->ses->server->srv_lock);
rc = -EACCES;
goto out;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->ses->server->srv_lock);
} else
tcon->unix_ext = 0; /* server does not support them */
rc = mount_get_conns(mnt_ctx);
if (mnt_ctx->server) {
cifs_dbg(FYI, "%s: marking tcp session as a dfs connection\n", __func__);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&mnt_ctx->server->srv_lock);
mnt_ctx->server->is_dfs_conn = true;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&mnt_ctx->server->srv_lock);
}
return rc;
}
return -ENOSYS;
/* only send once per connect */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (!server->ops->need_neg(server) ||
server->tcpStatus != CifsNeedNegotiate) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return 0;
}
server->tcpStatus = CifsInNegotiate;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
rc = server->ops->negotiate(xid, ses, server);
if (rc == 0) {
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsInNegotiate)
server->tcpStatus = CifsGood;
else
rc = -EHOSTDOWN;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
} else {
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsInNegotiate)
server->tcpStatus = CifsNeedNegotiate;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
}
return rc;
struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
bool is_binding = false;
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
if (server->dstaddr.ss_family == AF_INET6)
scnprintf(ses->ip_addr, sizeof(ses->ip_addr), "%pI6", &addr6->sin6_addr);
else
if (ses->ses_status != SES_GOOD &&
ses->ses_status != SES_NEW &&
ses->ses_status != SES_NEED_RECON) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
return 0;
}
if (CIFS_ALL_CHANS_GOOD(ses) ||
cifs_chan_in_reconnect(ses, server)) {
spin_unlock(&ses->chan_lock);
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
return 0;
}
is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses);
if (!is_binding)
ses->ses_status = SES_IN_SETUP;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
if (!is_binding) {
ses->capabilities = server->capabilities;
if (rc) {
cifs_server_dbg(VFS, "Send error in SessSetup = %d\n", rc);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
if (ses->ses_status == SES_IN_SETUP)
ses->ses_status = SES_NEED_RECON;
spin_lock(&ses->chan_lock);
cifs_chan_clear_in_reconnect(ses, server);
spin_unlock(&ses->chan_lock);
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
} else {
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
if (ses->ses_status == SES_IN_SETUP)
ses->ses_status = SES_GOOD;
spin_lock(&ses->chan_lock);
cifs_chan_clear_in_reconnect(ses, server);
cifs_chan_clear_need_reconnect(ses, server);
spin_unlock(&ses->chan_lock);
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
}
return rc;
struct dfs_info3_param ref = {0};
/* only send once per connect */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->ses->ses_status != SES_GOOD ||
(tcon->status != TID_NEW &&
tcon->status != TID_NEED_TCON)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->ses->ses_lock);
return 0;
}
tcon->status = TID_IN_TCON;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
tree = kzalloc(MAX_TREE_SIZE, GFP_KERNEL);
if (!tree) {
cifs_put_tcp_super(sb);
if (rc) {
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->status == TID_IN_TCON)
tcon->status = TID_NEED_TCON;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
} else {
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->status == TID_IN_TCON)
tcon->status = TID_GOOD;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
tcon->need_reconnect = false;
}
const struct smb_version_operations *ops = tcon->ses->server->ops;
/* only send once per connect */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->ses->ses_status != SES_GOOD ||
(tcon->status != TID_NEW &&
tcon->status != TID_NEED_TCON)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
return 0;
}
tcon->status = TID_IN_TCON;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
rc = ops->tree_connect(xid, tcon->ses, tcon->treeName, tcon, nlsc);
if (rc) {
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->status == TID_IN_TCON)
tcon->status = TID_NEED_TCON;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
} else {
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->status == TID_IN_TCON)
tcon->status = TID_GOOD;
- spin_unlock(&cifs_tcp_ses_lock);
tcon->need_reconnect = false;
+ spin_unlock(&tcon->tc_lock);
}
return rc;
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
- if (!server->is_dfs_conn)
+ spin_lock(&server->srv_lock);
+ if (!server->is_dfs_conn) {
+ spin_unlock(&server->srv_lock);
continue;
+ }
+ spin_unlock(&server->srv_lock);
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+ spin_lock(&tcon->tc_lock);
if (!tcon->ipc && !tcon->need_reconnect) {
tcon->tc_count++;
list_add_tail(&tcon->ulist, &tcons);
}
+ spin_unlock(&tcon->tc_lock);
}
}
}
ret_buf = kzalloc(sizeof(struct cifs_ses), GFP_KERNEL);
if (ret_buf) {
atomic_inc(&sesInfoAllocCount);
+ spin_lock_init(&ret_buf->ses_lock);
ret_buf->ses_status = SES_NEW;
++ret_buf->ses_count;
INIT_LIST_HEAD(&ret_buf->smb_ses_list);
atomic_inc(&tconInfoAllocCount);
ret_buf->status = TID_NEW;
++ret_buf->tc_count;
+ spin_lock_init(&ret_buf->tc_lock);
INIT_LIST_HEAD(&ret_buf->openFileList);
INIT_LIST_HEAD(&ret_buf->tcon_list);
spin_lock_init(&ret_buf->open_file_lock);
struct smb_hdr *buf = (struct smb_hdr *)buffer;
struct mid_q_entry *mid;
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
list_for_each_entry(mid, &server->pending_mid_q, qhead) {
if (compare_mid(mid->mid, buf) &&
mid->mid_state == MID_REQUEST_SUBMITTED &&
le16_to_cpu(mid->command) == buf->Command) {
kref_get(&mid->refcount);
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
return mid;
}
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
return NULL;
}
__u16 last_mid, cur_mid;
bool collision, reconnect = false;
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
/* mid is 16 bit only for CIFS/SMB */
cur_mid = (__u16)((server->CurrentMid) & 0xffff);
}
cur_mid++;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
if (reconnect) {
cifs_signal_cifsd_for_reconnect(server, false);
optype, scredits, add);
}
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsNeedReconnect
|| server->tcpStatus == CifsExiting) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
switch (rc) {
case -1:
spin_lock(&server->req_lock);
} else {
spin_unlock(&server->req_lock);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsExiting) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return -ENOENT;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
spin_lock(&server->req_lock);
scredits = server->credits;
{
__u64 mid;
/* for SMB2 we need the current value */
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
mid = server->CurrentMid++;
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
return mid;
}
static void
smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
{
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
if (server->CurrentMid >= val)
server->CurrentMid -= val;
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
}
static struct mid_q_entry *
return NULL;
}
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
list_for_each_entry(mid, &server->pending_mid_q, qhead) {
if ((mid->mid == wire_mid) &&
(mid->mid_state == MID_REQUEST_SUBMITTED) &&
list_del_init(&mid->qhead);
mid->mid_flags |= MID_DELETED;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
return mid;
}
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
return NULL;
}
{
int rc;
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
server->CurrentMid = 0;
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
rc = SMB2_negotiate(xid, ses, server);
/* BB we probably don't need to retry with modern servers */
if (rc == -EAGAIN)
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
+ spin_lock(&tcon->tc_lock);
tcon->need_reconnect = true;
+ spin_unlock(&tcon->tc_lock);
spin_unlock(&cifs_tcp_ses_lock);
pr_warn_once("Server share %s deleted.\n",
tcon->treeName);
list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
if (ses->Suid == ses_id) {
+ spin_lock(&ses->ses_lock);
ses_enc_key = enc ? ses->smb3encryptionkey :
ses->smb3decryptionkey;
memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
+ spin_unlock(&ses->ses_lock);
spin_unlock(&cifs_tcp_ses_lock);
return 0;
}
mid->callback(mid);
} else {
- spin_lock(&cifs_tcp_ses_lock);
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&dw->server->srv_lock);
if (dw->server->tcpStatus == CifsNeedReconnect) {
+ spin_lock(&dw->server->mid_lock);
mid->mid_state = MID_RETRY_NEEDED;
- spin_unlock(&GlobalMid_Lock);
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&dw->server->mid_lock);
+ spin_unlock(&dw->server->srv_lock);
mid->callback(mid);
} else {
+ spin_lock(&dw->server->mid_lock);
mid->mid_state = MID_REQUEST_SUBMITTED;
mid->mid_flags &= ~(MID_DELETED);
list_add_tail(&mid->qhead,
&dw->server->pending_mid_q);
- spin_unlock(&GlobalMid_Lock);
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&dw->server->mid_lock);
+ spin_unlock(&dw->server->srv_lock);
}
}
cifs_mid_q_entry_release(mid);
if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL)
return 0;
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&tcon->tc_lock);
if (tcon->status == TID_EXITING) {
/*
* only tree disconnect, open, and write,
if ((smb2_command != SMB2_WRITE) &&
(smb2_command != SMB2_CREATE) &&
(smb2_command != SMB2_TREE_DISCONNECT)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
cifs_dbg(FYI, "can not send cmd %d while umounting\n",
smb2_command);
return -ENODEV;
}
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&tcon->tc_lock);
if ((!tcon->ses) || (tcon->ses->ses_status == SES_EXITING) ||
(!tcon->ses->server) || !server)
return -EIO;
}
/* are we still trying to reconnect? */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus != CifsNeedReconnect) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
break;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
if (retries && --retries)
continue;
* and the server never sends an answer the socket will be closed
* and tcpStatus set to reconnect.
*/
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsNeedReconnect) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
rc = -EHOSTDOWN;
goto out;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
/*
* need to prevent multiple threads trying to simultaneously
cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->ops->need_neg &&
server->ops->need_neg(server)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
/* No need to send echo on newly established connections */
mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
return rc;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
rc = smb2_plain_req_init(SMB2_ECHO, NULL, server,
(void **)&req, &total_len);
if (!is_signed)
return 0;
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->ops->need_neg &&
server->ops->need_neg(server)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return 0;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
if (!is_binding && !server->session_estab) {
strncpy(shdr->Signature, "BSRSPYL", 8);
return 0;
smb2_get_mid_entry(struct cifs_ses *ses, struct TCP_Server_Info *server,
struct smb2_hdr *shdr, struct mid_q_entry **mid)
{
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsExiting) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return -ENOENT;
}
if (server->tcpStatus == CifsNeedReconnect) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
cifs_dbg(FYI, "tcp session dead - return to caller to retry\n");
return -EAGAIN;
}
if (server->tcpStatus == CifsNeedNegotiate &&
shdr->Command != SMB2_NEGOTIATE) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return -EAGAIN;
}
+ spin_unlock(&server->srv_lock);
+ spin_lock(&ses->ses_lock);
if (ses->ses_status == SES_NEW) {
if ((shdr->Command != SMB2_SESSION_SETUP) &&
(shdr->Command != SMB2_NEGOTIATE)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
return -EAGAIN;
}
/* else ok - we are setting up session */
if (ses->ses_status == SES_EXITING) {
if (shdr->Command != SMB2_LOGOFF) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
return -EAGAIN;
}
/* else ok - we are shutting down the session */
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
*mid = smb2_mid_entry_alloc(shdr, server);
if (*mid == NULL)
return -ENOMEM;
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
list_add_tail(&(*mid)->qhead, &server->pending_mid_q);
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
return 0;
}
(struct smb2_hdr *)rqst->rq_iov[0].iov_base;
struct mid_q_entry *mid;
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsNeedNegotiate &&
shdr->Command != SMB2_NEGOTIATE) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return ERR_PTR(-EAGAIN);
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
smb2_seq_num_into_buf(server, shdr);
void cifs_mid_q_entry_release(struct mid_q_entry *midEntry)
{
- spin_lock(&GlobalMid_Lock);
+ struct TCP_Server_Info *server = midEntry->server;
+
+ spin_lock(&server->mid_lock);
kref_put(&midEntry->refcount, _cifs_mid_q_entry_release);
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
}
void DeleteMidQEntry(struct mid_q_entry *midEntry)
void
cifs_delete_mid(struct mid_q_entry *mid)
{
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&mid->server->mid_lock);
if (!(mid->mid_flags & MID_DELETED)) {
list_del_init(&mid->qhead);
mid->mid_flags |= MID_DELETED;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&mid->server->mid_lock);
DeleteMidQEntry(mid);
}
} else {
spin_unlock(&server->req_lock);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsExiting) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return -ENOENT;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
/*
* For normal commands, reserve the last MAX_COMPOUND
static int allocate_mid(struct cifs_ses *ses, struct smb_hdr *in_buf,
struct mid_q_entry **ppmidQ)
{
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
if (ses->ses_status == SES_NEW) {
if ((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) &&
(in_buf->Command != SMB_COM_NEGOTIATE)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
return -EAGAIN;
}
/* else ok - we are setting up session */
if (ses->ses_status == SES_EXITING) {
/* check if SMB session is bad because we are setting it up */
if (in_buf->Command != SMB_COM_LOGOFF_ANDX) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
return -EAGAIN;
}
/* else ok - we are shutting down session */
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
*ppmidQ = AllocMidQEntry(in_buf, ses->server);
if (*ppmidQ == NULL)
return -ENOMEM;
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&ses->server->mid_lock);
list_add_tail(&(*ppmidQ)->qhead, &ses->server->pending_mid_q);
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&ses->server->mid_lock);
return 0;
}
mid->mid_state = MID_REQUEST_SUBMITTED;
/* put it on the pending_mid_q */
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
list_add_tail(&mid->qhead, &server->pending_mid_q);
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
/*
* Need to store the time in mid before calling I/O. For call_async,
cifs_dbg(FYI, "%s: cmd=%d mid=%llu state=%d\n",
__func__, le16_to_cpu(mid->command), mid->mid, mid->mid_state);
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
switch (mid->mid_state) {
case MID_RESPONSE_RECEIVED:
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
return rc;
case MID_RETRY_NEEDED:
rc = -EAGAIN;
__func__, mid->mid, mid->mid_state);
rc = -EIO;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
DeleteMidQEntry(mid);
return rc;
return -EIO;
}
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsExiting) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return -ENOENT;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
/*
* Wait for all the requests to become available.
/*
* Compounding is never used during session establish.
*/
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
if ((ses->ses_status == SES_NEW) || (optype & CIFS_NEG_OP) || (optype & CIFS_SESS_OP)) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
cifs_server_lock(server);
smb311_update_preauth_hash(ses, server, rqst[0].rq_iov, rqst[0].rq_nvec);
cifs_server_unlock(server);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
for (i = 0; i < num_rqst; i++) {
rc = wait_for_response(server, midQ[i]);
cifs_server_dbg(FYI, "Cancelling wait for mid %llu cmd: %d\n",
midQ[i]->mid, le16_to_cpu(midQ[i]->command));
send_cancel(server, &rqst[i], midQ[i]);
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
midQ[i]->mid_flags |= MID_WAIT_CANCELLED;
if (midQ[i]->mid_state == MID_REQUEST_SUBMITTED) {
midQ[i]->callback = cifs_cancelled_callback;
cancelled_mid[i] = true;
credits[i].value = 0;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
}
}
/*
* Compounding is never used during session establish.
*/
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
if ((ses->ses_status == SES_NEW) || (optype & CIFS_NEG_OP) || (optype & CIFS_SESS_OP)) {
struct kvec iov = {
.iov_base = resp_iov[0].iov_base,
.iov_len = resp_iov[0].iov_len
};
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
cifs_server_lock(server);
smb311_update_preauth_hash(ses, server, &iov, 1);
cifs_server_unlock(server);
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&ses->ses_lock);
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&ses->ses_lock);
out:
/*
return -EIO;
}
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsExiting) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return -ENOENT;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
/* Ensure that we do not send more than 50 overlapping requests
to the same server. We may make this configurable later or
rc = wait_for_response(server, midQ);
if (rc != 0) {
send_cancel(server, &rqst, midQ);
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
/* no longer considered to be "in-flight" */
midQ->callback = DeleteMidQEntry;
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
add_credits(server, &credits, 0);
return rc;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
}
rc = cifs_sync_mid_result(midQ, server);
return -EIO;
}
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if (server->tcpStatus == CifsExiting) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
return -ENOENT;
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
/* Ensure that we do not send more than 50 overlapping requests
to the same server. We may make this configurable later or
(server->tcpStatus != CifsNew)));
/* Were we interrupted by a signal ? */
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
if ((rc == -ERESTARTSYS) &&
(midQ->mid_state == MID_REQUEST_SUBMITTED) &&
((server->tcpStatus == CifsGood) ||
(server->tcpStatus == CifsNew))) {
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
if (in_buf->Command == SMB_COM_TRANSACTION2) {
/* POSIX lock. We send a NT_CANCEL SMB to cause the
rc = wait_for_response(server, midQ);
if (rc) {
send_cancel(server, &rqst, midQ);
- spin_lock(&GlobalMid_Lock);
+ spin_lock(&server->mid_lock);
if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
/* no longer considered to be "in-flight" */
midQ->callback = DeleteMidQEntry;
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
return rc;
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
}
/* We got the response - restart system call. */
rstart = 1;
- spin_lock(&cifs_tcp_ses_lock);
+ spin_lock(&server->srv_lock);
}
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&server->srv_lock);
rc = cifs_sync_mid_result(midQ, server);
if (rc != 0)
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