summaryrefslogtreecommitdiff
path: root/fs
diff options
context:
space:
mode:
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/Makefile4
-rw-r--r--fs/cifs/cifs_debug.c72
-rw-r--r--fs/cifs/cifsacl.c2
-rw-r--r--fs/cifs/cifsencrypt.c6
-rw-r--r--fs/cifs/cifsfs.c53
-rw-r--r--fs/cifs/cifsfs.h4
-rw-r--r--fs/cifs/cifsglob.h135
-rw-r--r--fs/cifs/cifsproto.h10
-rw-r--r--fs/cifs/cifssmb.c477
-rw-r--r--fs/cifs/connect.c299
-rw-r--r--fs/cifs/dfs_cache.c8
-rw-r--r--fs/cifs/dir.c8
-rw-r--r--fs/cifs/file.c283
-rw-r--r--fs/cifs/inode.c64
-rw-r--r--fs/cifs/ioctl.c2
-rw-r--r--fs/cifs/link.c8
-rw-r--r--fs/cifs/misc.c33
-rw-r--r--fs/cifs/netmisc.c2
-rw-r--r--fs/cifs/sess.c5
-rw-r--r--fs/cifs/smb1ops.c10
-rw-r--r--fs/cifs/smb2misc.c49
-rw-r--r--fs/cifs/smb2ops.c61
-rw-r--r--fs/cifs/smb2pdu.c32
-rw-r--r--fs/cifs/smb2transport.c38
-rw-r--r--fs/cifs/transport.c334
-rw-r--r--fs/cifs/xattr.c5
26 files changed, 1099 insertions, 905 deletions
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index 8c9f2c00be72..e882e912a517 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -5,7 +5,7 @@
ccflags-y += -I$(src) # needed for trace events
obj-$(CONFIG_CIFS) += cifs.o
-cifs-y := trace.o cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o \
+cifs-y := trace.o cifsfs.o cifs_debug.o connect.o dir.o file.o \
inode.o link.o misc.o netmisc.o smbencrypt.o transport.o \
cifs_unicode.o nterr.o cifsencrypt.o \
readdir.o ioctl.o sess.o export.o unc.o winucase.o \
@@ -31,4 +31,4 @@ cifs-$(CONFIG_CIFS_SMB_DIRECT) += smbdirect.o
cifs-$(CONFIG_CIFS_ROOT) += cifsroot.o
-cifs-$(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) += smb1ops.o
+cifs-$(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) += smb1ops.o cifssmb.o
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 2cfbac8bb965..11fd85de7217 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -36,7 +36,7 @@ cifs_dump_mem(char *label, void *data, int length)
void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
{
#ifdef CONFIG_CIFS_DEBUG2
- struct smb_hdr *smb = (struct smb_hdr *)buf;
+ struct smb_hdr *smb = buf;
cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
smb->Command, smb->Status.CifsError,
@@ -55,7 +55,7 @@ void cifs_dump_mids(struct TCP_Server_Info *server)
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,
@@ -78,7 +78,7 @@ void cifs_dump_mids(struct TCP_Server_Info *server)
mid_entry->resp_buf, 62);
}
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
#endif /* CONFIG_CIFS_DEBUG2 */
}
@@ -168,7 +168,6 @@ cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
{
- struct list_head *tmp, *tmp1, *tmp2;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
@@ -184,14 +183,10 @@ static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
#endif /* CIFS_DEBUG2 */
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
- list_for_each(tmp, &server->smb_ses_list) {
- ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
- list_for_each(tmp1, &ses->tcon_list) {
- tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
+ 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->open_file_lock);
- list_for_each(tmp2, &tcon->openFileList) {
- cfile = list_entry(tmp2, struct cifsFileInfo,
- tlist);
+ list_for_each_entry(cfile, &tcon->openFileList, tlist) {
seq_printf(m,
"0x%x 0x%llx 0x%x %d %d %d %pd",
tcon->tid,
@@ -218,7 +213,6 @@ static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
{
- struct list_head *tmp2, *tmp3;
struct mid_q_entry *mid_entry;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
@@ -381,9 +375,7 @@ skip_rdma:
seq_printf(m, "\n\n\tSessions: ");
i = 0;
- list_for_each(tmp2, &server->smb_ses_list) {
- ses = list_entry(tmp2, struct cifs_ses,
- smb_ses_list);
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
i++;
if ((ses->serverDomain == NULL) ||
(ses->serverOS == NULL) ||
@@ -447,9 +439,7 @@ skip_rdma:
else
seq_puts(m, "none\n");
- list_for_each(tmp3, &ses->tcon_list) {
- tcon = list_entry(tmp3, struct cifs_tcon,
- tcon_list);
+ list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
++j;
seq_printf(m, "\n\t%d) ", j);
cifs_debug_tcon(m, tcon);
@@ -473,10 +463,8 @@ skip_rdma:
seq_printf(m, "\n\t\t[NONE]");
seq_puts(m, "\n\n\tMIDs: ");
- spin_lock(&GlobalMid_Lock);
- list_for_each(tmp3, &server->pending_mid_q) {
- mid_entry = list_entry(tmp3, struct mid_q_entry,
- qhead);
+ 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->mid_state,
@@ -485,7 +473,7 @@ skip_rdma:
mid_entry->callback_data,
mid_entry->mid);
}
- spin_unlock(&GlobalMid_Lock);
+ spin_unlock(&server->mid_lock);
seq_printf(m, "\n--\n");
}
if (c == 0)
@@ -504,7 +492,6 @@ static ssize_t cifs_stats_proc_write(struct file *file,
{
bool bv;
int rc;
- struct list_head *tmp1, *tmp2, *tmp3;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
@@ -514,8 +501,8 @@ static ssize_t cifs_stats_proc_write(struct file *file,
#ifdef CONFIG_CIFS_STATS2
int i;
- atomic_set(&totBufAllocCount, 0);
- atomic_set(&totSmBufAllocCount, 0);
+ atomic_set(&total_buf_alloc_count, 0);
+ atomic_set(&total_small_buf_alloc_count, 0);
#endif /* CONFIG_CIFS_STATS2 */
atomic_set(&tcpSesReconnectCount, 0);
atomic_set(&tconInfoReconnectCount, 0);
@@ -525,9 +512,7 @@ static ssize_t cifs_stats_proc_write(struct file *file,
GlobalCurrentXid = 0;
spin_unlock(&GlobalMid_Lock);
spin_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp1, &cifs_tcp_ses_list) {
- server = list_entry(tmp1, struct TCP_Server_Info,
- tcp_ses_list);
+ list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
server->max_in_flight = 0;
#ifdef CONFIG_CIFS_STATS2
for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
@@ -538,13 +523,8 @@ static ssize_t cifs_stats_proc_write(struct file *file,
server->fastest_cmd[0] = 0;
}
#endif /* CONFIG_CIFS_STATS2 */
- list_for_each(tmp2, &server->smb_ses_list) {
- ses = list_entry(tmp2, struct cifs_ses,
- smb_ses_list);
- list_for_each(tmp3, &ses->tcon_list) {
- tcon = list_entry(tmp3,
- struct cifs_tcon,
- tcon_list);
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
atomic_set(&tcon->num_smbs_sent, 0);
spin_lock(&tcon->stat_lock);
tcon->bytes_read = 0;
@@ -569,7 +549,6 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
#ifdef CONFIG_CIFS_STATS2
int j;
#endif /* STATS2 */
- struct list_head *tmp2, *tmp3;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
@@ -579,17 +558,17 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
seq_printf(m, "Share (unique mount targets): %d\n",
tconInfoAllocCount.counter);
seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
- bufAllocCount.counter,
+ buf_alloc_count.counter,
cifs_min_rcv + tcpSesAllocCount.counter);
seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
- smBufAllocCount.counter, cifs_min_small);
+ small_buf_alloc_count.counter, cifs_min_small);
#ifdef CONFIG_CIFS_STATS2
seq_printf(m, "Total Large %d Small %d Allocations\n",
- atomic_read(&totBufAllocCount),
- atomic_read(&totSmBufAllocCount));
+ atomic_read(&total_buf_alloc_count),
+ atomic_read(&total_small_buf_alloc_count));
#endif /* CONFIG_CIFS_STATS2 */
- seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
+ seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count));
seq_printf(m,
"\n%d session %d share reconnects\n",
tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
@@ -619,13 +598,8 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
atomic_read(&server->smb2slowcmd[j]),
server->hostname, j);
#endif /* STATS2 */
- list_for_each(tmp2, &server->smb_ses_list) {
- ses = list_entry(tmp2, struct cifs_ses,
- smb_ses_list);
- list_for_each(tmp3, &ses->tcon_list) {
- tcon = list_entry(tmp3,
- struct cifs_tcon,
- tcon_list);
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
i++;
seq_printf(m, "\n%d) %s", i, tcon->treeName);
if (tcon->need_reconnect)
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index bf861fef2f0c..fa480d62f313 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -1379,6 +1379,7 @@ chown_chgrp_exit:
return rc;
}
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
const struct cifs_fid *cifsfid, u32 *pacllen,
u32 __maybe_unused unused)
@@ -1512,6 +1513,7 @@ out:
cifs_put_tlink(tlink);
return rc;
}
+#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
/* Translate the CIFS ACL (similar to NTFS ACL) for a file into mode bits */
int
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 663cb9db4908..8f7835ccbca1 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -141,13 +141,13 @@ int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server,
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);
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 8f2e003e0590..8849f0852110 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -68,6 +68,34 @@ bool enable_negotiate_signing; /* false by default */
unsigned int global_secflags = CIFSSEC_DEF;
/* unsigned int ntlmv2_support = 0; */
unsigned int sign_CIFS_PDUs = 1;
+
+/*
+ * Global transaction id (XID) information
+ */
+unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
+unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
+unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
+spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */
+
+/*
+ * Global counters, updated atomically
+ */
+atomic_t sesInfoAllocCount;
+atomic_t tconInfoAllocCount;
+atomic_t tcpSesNextId;
+atomic_t tcpSesAllocCount;
+atomic_t tcpSesReconnectCount;
+atomic_t tconInfoReconnectCount;
+
+atomic_t mid_count;
+atomic_t buf_alloc_count;
+atomic_t small_buf_alloc_count;
+#ifdef CONFIG_CIFS_STATS2
+atomic_t total_buf_alloc_count;
+atomic_t total_small_buf_alloc_count;
+#endif/* STATS2 */
+struct list_head cifs_tcp_ses_list;
+spinlock_t cifs_tcp_ses_lock;
static const struct super_operations cifs_super_ops;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
module_param(CIFSMaxBufSize, uint, 0444);
@@ -703,14 +731,17 @@ static void cifs_umount_begin(struct super_block *sb)
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 */
@@ -1537,8 +1568,7 @@ cifs_destroy_request_bufs(void)
kmem_cache_destroy(cifs_sm_req_cachep);
}
-static int
-cifs_init_mids(void)
+static int init_mids(void)
{
cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
sizeof(struct mid_q_entry), 0,
@@ -1556,8 +1586,7 @@ cifs_init_mids(void)
return 0;
}
-static void
-cifs_destroy_mids(void)
+static void destroy_mids(void)
{
mempool_destroy(cifs_mid_poolp);
kmem_cache_destroy(cifs_mid_cachep);
@@ -1579,11 +1608,11 @@ init_cifs(void)
atomic_set(&tcpSesReconnectCount, 0);
atomic_set(&tconInfoReconnectCount, 0);
- atomic_set(&bufAllocCount, 0);
- atomic_set(&smBufAllocCount, 0);
+ atomic_set(&buf_alloc_count, 0);
+ atomic_set(&small_buf_alloc_count, 0);
#ifdef CONFIG_CIFS_STATS2
- atomic_set(&totBufAllocCount, 0);
- atomic_set(&totSmBufAllocCount, 0);
+ atomic_set(&total_buf_alloc_count, 0);
+ atomic_set(&total_small_buf_alloc_count, 0);
if (slow_rsp_threshold < 1)
cifs_dbg(FYI, "slow_response_threshold msgs disabled\n");
else if (slow_rsp_threshold > 32767)
@@ -1591,7 +1620,7 @@ init_cifs(void)
"slow response threshold set higher than recommended (0 to 32767)\n");
#endif /* CONFIG_CIFS_STATS2 */
- atomic_set(&midCount, 0);
+ atomic_set(&mid_count, 0);
GlobalCurrentXid = 0;
GlobalTotalActiveXid = 0;
GlobalMaxActiveXid = 0;
@@ -1654,7 +1683,7 @@ init_cifs(void)
if (rc)
goto out_destroy_deferredclose_wq;
- rc = cifs_init_mids();
+ rc = init_mids();
if (rc)
goto out_destroy_inodecache;
@@ -1711,7 +1740,7 @@ out_destroy_request_bufs:
#endif
cifs_destroy_request_bufs();
out_destroy_mids:
- cifs_destroy_mids();
+ destroy_mids();
out_destroy_inodecache:
cifs_destroy_inodecache();
out_destroy_deferredclose_wq:
@@ -1747,7 +1776,7 @@ exit_cifs(void)
dfs_cache_destroy();
#endif
cifs_destroy_request_bufs();
- cifs_destroy_mids();
+ destroy_mids();
cifs_destroy_inodecache();
destroy_workqueue(deferredclose_wq);
destroy_workqueue(cifsoplockd_wq);
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index b17be47a8e59..81f4c15936d0 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -153,6 +153,6 @@ extern const struct export_operations cifs_export_ops;
#endif /* CONFIG_CIFS_NFSD_EXPORT */
/* when changing internal version - update following two lines at same time */
-#define SMB3_PRODUCT_BUILD 37
-#define CIFS_VERSION "2.37"
+#define SMB3_PRODUCT_BUILD 38
+#define CIFS_VERSION "2.38"
#endif /* _CIFSFS_H */
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index a643c84ff1e9..3070407cafa7 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -605,6 +605,7 @@ inc_rfc1001_len(void *buf, int count)
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 */
@@ -622,6 +623,7 @@ struct TCP_Server_Info {
#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 */
@@ -1008,6 +1010,7 @@ struct cifs_ses {
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 */
@@ -1169,6 +1172,7 @@ struct cifs_tcon {
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;
@@ -1899,33 +1903,78 @@ require use of the stronger protocol */
*/
/****************************************************************************
- * 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
@@ -1941,47 +1990,44 @@ require use of the stronger protocol */
* sessions (and from that the tree connections) can be found
* by iterating over cifs_tcp_ses_list
*/
-GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
+extern struct list_head cifs_tcp_ses_list;
/*
* 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
*/
-GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
+extern spinlock_t cifs_tcp_ses_lock;
/*
* Global transaction id (XID) information
*/
-GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
-GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
-GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
-GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
- /* on midQ entries */
+extern unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
+extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
+extern unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
+extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */
+
/*
* Global counters, updated atomically
*/
-GLOBAL_EXTERN atomic_t sesInfoAllocCount;
-GLOBAL_EXTERN atomic_t tconInfoAllocCount;
-GLOBAL_EXTERN atomic_t tcpSesNextId;
-GLOBAL_EXTERN atomic_t tcpSesAllocCount;
-GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
-GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
+extern atomic_t sesInfoAllocCount;
+extern atomic_t tconInfoAllocCount;
+extern atomic_t tcpSesNextId;
+extern atomic_t tcpSesAllocCount;
+extern atomic_t tcpSesReconnectCount;
+extern atomic_t tconInfoReconnectCount;
/* Various Debug counters */
-GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
+extern atomic_t buf_alloc_count; /* current number allocated */
+extern atomic_t small_buf_alloc_count;
#ifdef CONFIG_CIFS_STATS2
-GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
-GLOBAL_EXTERN atomic_t totSmBufAllocCount;
+extern atomic_t total_buf_alloc_count; /* total allocated over all time */
+extern atomic_t total_small_buf_alloc_count;
extern unsigned int slow_rsp_threshold; /* number of secs before logging */
#endif
-GLOBAL_EXTERN atomic_t smBufAllocCount;
-GLOBAL_EXTERN atomic_t midCount;
/* Misc globals */
extern bool enable_oplocks; /* enable or disable oplocks */
@@ -1998,6 +2044,7 @@ extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
extern unsigned int cifs_min_small; /* min size of small buf pool */
extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
+extern atomic_t mid_count;
void cifs_oplock_break(struct work_struct *work);
void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index d59aebefa71c..daaadffa2b88 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -78,12 +78,8 @@ extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
extern char *cifs_compose_mount_options(const char *sb_mountdata,
const char *fullpath, const struct dfs_info3_param *ref,
char **devname);
-/* extern void renew_parental_timestamps(struct dentry *direntry);*/
-extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer,
- struct TCP_Server_Info *server);
-extern void DeleteMidQEntry(struct mid_q_entry *midEntry);
-extern void cifs_delete_mid(struct mid_q_entry *mid);
-extern void cifs_mid_q_entry_release(struct mid_q_entry *midEntry);
+extern void delete_mid(struct mid_q_entry *mid);
+extern void release_mid(struct mid_q_entry *mid);
extern void cifs_wake_up_task(struct mid_q_entry *mid);
extern int cifs_handle_standard(struct TCP_Server_Info *server,
struct mid_q_entry *mid);
@@ -521,6 +517,7 @@ extern int generate_smb30signingkey(struct cifs_ses *ses,
extern int generate_smb311signingkey(struct cifs_ses *ses,
struct TCP_Server_Info *server);
+#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
extern int CIFSSMBCopy(unsigned int xid,
struct cifs_tcon *source_tcon,
const char *fromName,
@@ -551,6 +548,7 @@ extern int CIFSSMBSetPosixACL(const unsigned int xid, struct cifs_tcon *tcon,
const struct nls_table *nls_codepage, int remap_special_chars);
extern int CIFSGetExtAttr(const unsigned int xid, struct cifs_tcon *tcon,
const int netfid, __u64 *pExtAttrBits, __u64 *pMask);
+#endif /* CIFS_ALLOW_INSECURE_LEGACY */
extern void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb);
extern bool couldbe_mf_symlink(const struct cifs_fattr *fattr);
extern int check_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 6371b9eebdad..7aa91e272027 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -29,7 +29,6 @@
#include "cifsproto.h"
#include "cifs_unicode.h"
#include "cifs_debug.h"
-#include "smb2proto.h"
#include "fscache.h"
#include "smbdirect.h"
#ifdef CONFIG_CIFS_DFS_UPCALL
@@ -62,52 +61,6 @@ static struct {
#define CIFS_NUM_PROT 1
#endif /* CIFS_POSIX */
-/*
- * Mark as invalid, all open files on tree connections since they
- * were closed when session to server was lost.
- */
-void
-cifs_mark_open_files_invalid(struct cifs_tcon *tcon)
-{
- struct cifsFileInfo *open_file = NULL;
- struct list_head *tmp;
- struct list_head *tmp1;
-
- /* only send once per connect */
- spin_lock(&cifs_tcp_ses_lock);
- if ((tcon->ses->ses_status != SES_GOOD) || (tcon->status != TID_NEED_RECON)) {
- spin_unlock(&cifs_tcp_ses_lock);
- return;
- }
- tcon->status = TID_IN_FILES_INVALIDATE;
- spin_unlock(&cifs_tcp_ses_lock);
-
- /* list all files open on tree connection and mark them invalid */
- spin_lock(&tcon->open_file_lock);
- list_for_each_safe(tmp, tmp1, &tcon->openFileList) {
- open_file = list_entry(tmp, struct cifsFileInfo, tlist);
- open_file->invalidHandle = true;
- open_file->oplock_break_cancelled = true;
- }
- spin_unlock(&tcon->open_file_lock);
-
- mutex_lock(&tcon->crfid.fid_mutex);
- tcon->crfid.is_valid = false;
- /* cached handle is not valid, so SMB2_CLOSE won't be sent below */
- close_cached_dir_lease_locked(&tcon->crfid);
- memset(tcon->crfid.fid, 0, sizeof(struct cifs_fid));
- mutex_unlock(&tcon->crfid.fid_mutex);
-
- spin_lock(&cifs_tcp_ses_lock);
- if (tcon->status == TID_IN_FILES_INVALIDATE)
- tcon->status = TID_NEED_TCON;
- spin_unlock(&cifs_tcp_ses_lock);
-
- /*
- * BB Add call to invalidate_inodes(sb) for all superblocks mounted
- * to this tcon.
- */
-}
/* reconnect the socket, tcon, and smb session if needed */
static int
@@ -134,18 +87,18 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command)
* 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;
@@ -165,12 +118,12 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command)
}
/* 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