aboutsummaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-20 16:36:38 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-20 16:36:38 -0800
commit5cdec1fca2ff128ca0716dc1ef0fc0043e4ae8ab (patch)
tree35dbfed2dc57b80d18276413361c34905fe8312c /fs
parentMerge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus (diff)
parentcifs: mangle existing header for SMB_COM_NT_CANCEL (diff)
downloadlinux-dev-5cdec1fca2ff128ca0716dc1ef0fc0043e4ae8ab.tar.xz
linux-dev-5cdec1fca2ff128ca0716dc1ef0fc0043e4ae8ab.zip
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: cifs: mangle existing header for SMB_COM_NT_CANCEL cifs: remove code for setting timeouts on requests [CIFS] cifs: reconnect unresponsive servers cifs: set up recurring workqueue job to do SMB echo requests cifs: add ability to send an echo request cifs: add cifs_call_async cifs: allow for different handling of received response cifs: clean up sync_mid_result cifs: don't reconnect server when we don't get a response cifs: wait indefinitely for responses cifs: Use mask of ACEs for SID Everyone to calculate all three permissions user, group, and other cifs: Fix regression during share-level security mounts (Repost) [CIFS] Update cifs version number cifs: move mid result processing into common function cifs: move locked sections out of DeleteMidQEntry and AllocMidQEntry cifs: clean up accesses to midCount cifs: make wait_for_free_request take a TCP_Server_Info pointer cifs: no need to mark smb_ses_list as cifs_demultiplex_thread is exiting cifs: don't fail writepages on -EAGAIN errors CIFS: Fix oplock break handling (try #2)
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/cifs_debug.c10
-rw-r--r--fs/cifs/cifsacl.c13
-rw-r--r--fs/cifs/cifsfs.c6
-rw-r--r--fs/cifs/cifsfs.h2
-rw-r--r--fs/cifs/cifsglob.h28
-rw-r--r--fs/cifs/cifspdu.h15
-rw-r--r--fs/cifs/cifsproto.h9
-rw-r--r--fs/cifs/cifssmb.c59
-rw-r--r--fs/cifs/connect.c149
-rw-r--r--fs/cifs/file.c114
-rw-r--r--fs/cifs/misc.c2
-rw-r--r--fs/cifs/sess.c2
-rw-r--r--fs/cifs/transport.c427
13 files changed, 455 insertions, 381 deletions
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index ede98300a8cd..65829d32128c 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -79,11 +79,11 @@ void cifs_dump_mids(struct TCP_Server_Info *server)
spin_lock(&GlobalMid_Lock);
list_for_each(tmp, &server->pending_mid_q) {
mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
- cERROR(1, "State: %d Cmd: %d Pid: %d Tsk: %p Mid %d",
+ cERROR(1, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %d",
mid_entry->midState,
(int)mid_entry->command,
mid_entry->pid,
- mid_entry->tsk,
+ mid_entry->callback_data,
mid_entry->mid);
#ifdef CONFIG_CIFS_STATS2
cERROR(1, "IsLarge: %d buf: %p time rcv: %ld now: %ld",
@@ -218,11 +218,11 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
mid_entry = list_entry(tmp3, struct mid_q_entry,
qhead);
seq_printf(m, "\tState: %d com: %d pid:"
- " %d tsk: %p mid %d\n",
+ " %d cbdata: %p mid %d\n",
mid_entry->midState,
(int)mid_entry->command,
mid_entry->pid,
- mid_entry->tsk,
+ mid_entry->callback_data,
mid_entry->mid);
}
spin_unlock(&GlobalMid_Lock);
@@ -331,7 +331,7 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
atomic_read(&totSmBufAllocCount));
#endif /* CONFIG_CIFS_STATS2 */
- seq_printf(m, "Operations (MIDs): %d\n", midCount.counter);
+ seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
seq_printf(m,
"\n%d session %d share reconnects\n",
tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index a437ec391a01..1e7636b145a8 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -41,9 +41,12 @@ static struct cifs_wksid wksidarr[NUM_WK_SIDS] = {
;
-/* security id for everyone */
+/* security id for everyone/world system group */
static const struct cifs_sid sid_everyone = {
1, 1, {0, 0, 0, 0, 0, 1}, {0} };
+/* security id for Authenticated Users system group */
+static const struct cifs_sid sid_authusers = {
+ 1, 1, {0, 0, 0, 0, 0, 5}, {11} };
/* group users */
static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} };
@@ -365,7 +368,7 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
if (num_aces > 0) {
umode_t user_mask = S_IRWXU;
umode_t group_mask = S_IRWXG;
- umode_t other_mask = S_IRWXO;
+ umode_t other_mask = S_IRWXU | S_IRWXG | S_IRWXO;
ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
GFP_KERNEL);
@@ -390,6 +393,12 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
ppace[i]->type,
&fattr->cf_mode,
&other_mask);
+ if (compare_sids(&(ppace[i]->sid), &sid_authusers))
+ access_flags_to_mode(ppace[i]->access_req,
+ ppace[i]->type,
+ &fattr->cf_mode,
+ &other_mask);
+
/* memcpy((void *)(&(cifscred->aces[i])),
(void *)ppace[i],
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index d9f652a522a6..99d777a03dd0 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -77,7 +77,11 @@ unsigned int cifs_max_pending = CIFS_MAX_REQ;
module_param(cifs_max_pending, int, 0);
MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
"Default: 50 Range: 2 to 256");
-
+unsigned short echo_retries = 5;
+module_param(echo_retries, ushort, 0644);
+MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
+ "reconnecting server. Default: 5. 0 means "
+ "never reconnect.");
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
extern mempool_t *cifs_mid_poolp;
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 851030f74939..4739a531cded 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -118,5 +118,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
extern const struct export_operations cifs_export_ops;
#endif /* EXPERIMENTAL */
-#define CIFS_VERSION "1.68"
+#define CIFS_VERSION "1.69"
#endif /* _CIFSFS_H */
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 606ca8bb7102..571132c95231 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -218,6 +218,7 @@ struct TCP_Server_Info {
bool sec_kerberosu2u; /* supports U2U Kerberos */
bool sec_ntlmssp; /* supports NTLMSSP */
bool session_estab; /* mark when very first sess is established */
+ struct delayed_work echo; /* echo ping workqueue job */
#ifdef CONFIG_CIFS_FSCACHE
struct fscache_cookie *fscache; /* client index cache cookie */
#endif
@@ -508,6 +509,18 @@ static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
#endif
+struct mid_q_entry;
+
+/*
+ * This is the prototype for the mid callback function. When creating one,
+ * take special care to avoid deadlocks. Things to bear in mind:
+ *
+ * - it will be called by cifsd
+ * - the GlobalMid_Lock will be held
+ * - the mid will be removed from the pending_mid_q list
+ */
+typedef void (mid_callback_t)(struct mid_q_entry *mid);
+
/* one of these for every pending CIFS request to the server */
struct mid_q_entry {
struct list_head qhead; /* mids waiting on reply from this server */
@@ -519,7 +532,8 @@ struct mid_q_entry {
unsigned long when_sent; /* time when smb send finished */
unsigned long when_received; /* when demux complete (taken off wire) */
#endif
- struct task_struct *tsk; /* task waiting for response */
+ mid_callback_t *callback; /* call completion callback */
+ void *callback_data; /* general purpose pointer for callback */
struct smb_hdr *resp_buf; /* response buffer */
int midState; /* wish this were enum but can not pass to wait_event */
__u8 command; /* smb command code */
@@ -622,12 +636,9 @@ static inline void free_dfs_info_array(struct dfs_info3_param *param,
#define CIFS_IOVEC 4 /* array of response buffers */
/* Type of Request to SendReceive2 */
-#define CIFS_STD_OP 0 /* normal request timeout */
-#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
-#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
-#define CIFS_BLOCKING_OP 4 /* operation can block */
-#define CIFS_ASYNC_OP 8 /* do not wait for response */
-#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
+#define CIFS_BLOCKING_OP 1 /* operation can block */
+#define CIFS_ASYNC_OP 2 /* do not wait for response */
+#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
#define CIFS_NO_RESP 0x040 /* no response buffer required */
@@ -790,6 +801,9 @@ GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
+/* reconnect after this many failed echo attempts */
+GLOBAL_EXTERN unsigned short echo_retries;
+
void cifs_oplock_break(struct work_struct *work);
void cifs_oplock_break_get(struct cifsFileInfo *cfile);
void cifs_oplock_break_put(struct cifsFileInfo *cfile);
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index de36b09763a8..ea205b4fcad2 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -50,6 +50,7 @@
#define SMB_COM_SETATTR 0x09 /* trivial response */
#define SMB_COM_LOCKING_ANDX 0x24 /* trivial response */
#define SMB_COM_COPY 0x29 /* trivial rsp, fail filename ignrd*/
+#define SMB_COM_ECHO 0x2B /* echo request */
#define SMB_COM_OPEN_ANDX 0x2D /* Legacy open for old servers */
#define SMB_COM_READ_ANDX 0x2E
#define SMB_COM_WRITE_ANDX 0x2F
@@ -760,6 +761,20 @@ typedef struct smb_com_tconx_rsp_ext {
*
*/
+typedef struct smb_com_echo_req {
+ struct smb_hdr hdr;
+ __le16 EchoCount;
+ __le16 ByteCount;
+ char Data[1];
+} __attribute__((packed)) ECHO_REQ;
+
+typedef struct smb_com_echo_rsp {
+ struct smb_hdr hdr;
+ __le16 SequenceNumber;
+ __le16 ByteCount;
+ char Data[1];
+} __attribute__((packed)) ECHO_RSP;
+
typedef struct smb_com_logoff_andx_req {
struct smb_hdr hdr; /* wct = 2 */
__u8 AndXCommand;
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index e6d1481b16c1..982895fa7615 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -61,6 +61,12 @@ 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 int cifs_call_async(struct TCP_Server_Info *server,
+ struct smb_hdr *in_buf, mid_callback_t *callback,
+ void *cbdata);
extern int SendReceive(const unsigned int /* xid */ , struct cifsSesInfo *,
struct smb_hdr * /* input */ ,
struct smb_hdr * /* out */ ,
@@ -347,12 +353,13 @@ extern int CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
const __u16 netfid, const __u64 len,
const __u64 offset, const __u32 numUnlock,
const __u32 numLock, const __u8 lockType,
- const bool waitFlag);
+ const bool waitFlag, const __u8 oplock_level);
extern int CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
const __u16 smb_file_id, const int get_flag,
const __u64 len, struct file_lock *,
const __u16 lock_type, const bool waitFlag);
extern int CIFSSMBTDis(const int xid, struct cifsTconInfo *tcon);
+extern int CIFSSMBEcho(struct TCP_Server_Info *server);
extern int CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses);
extern struct cifsSesInfo *sesInfoAlloc(void);
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 2f6795e524d3..37113450757b 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -706,6 +706,53 @@ CIFSSMBTDis(const int xid, struct cifsTconInfo *tcon)
return rc;
}
+/*
+ * This is a no-op for now. We're not really interested in the reply, but
+ * rather in the fact that the server sent one and that server->lstrp
+ * gets updated.
+ *
+ * FIXME: maybe we should consider checking that the reply matches request?
+ */
+static void
+cifs_echo_callback(struct mid_q_entry *mid)
+{
+ struct TCP_Server_Info *server = mid->callback_data;
+
+ DeleteMidQEntry(mid);
+ atomic_dec(&server->inFlight);
+ wake_up(&server->request_q);
+}
+
+int
+CIFSSMBEcho(struct TCP_Server_Info *server)
+{
+ ECHO_REQ *smb;
+ int rc = 0;
+
+ cFYI(1, "In echo request");
+
+ rc = small_smb_init(SMB_COM_ECHO, 0, NULL, (void **)&smb);
+ if (rc)
+ return rc;
+
+ /* set up echo request */
+ smb->hdr.Tid = cpu_to_le16(0xffff);
+ smb->hdr.WordCount = cpu_to_le16(1);
+ smb->EchoCount = cpu_to_le16(1);
+ smb->ByteCount = cpu_to_le16(1);
+ smb->Data[0] = 'a';
+ smb->hdr.smb_buf_length += 3;
+
+ rc = cifs_call_async(server, (struct smb_hdr *)smb,
+ cifs_echo_callback, server);
+ if (rc)
+ cFYI(1, "Echo request failed: %d", rc);
+
+ cifs_small_buf_release(smb);
+
+ return rc;
+}
+
int
CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
{
@@ -1193,7 +1240,7 @@ OldOpenRetry:
pSMB->ByteCount = cpu_to_le16(count);
/* long_op set to 1 to allow for oplock break timeouts */
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
- (struct smb_hdr *)pSMBr, &bytes_returned, CIFS_LONG_OP);
+ (struct smb_hdr *)pSMBr, &bytes_returned, 0);
cifs_stats_inc(&tcon->num_opens);
if (rc) {
cFYI(1, "Error in Open = %d", rc);
@@ -1306,7 +1353,7 @@ openRetry:
pSMB->ByteCount = cpu_to_le16(count);
/* long_op set to 1 to allow for oplock break timeouts */
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
- (struct smb_hdr *)pSMBr, &bytes_returned, CIFS_LONG_OP);
+ (struct smb_hdr *)pSMBr, &bytes_returned, 0);
cifs_stats_inc(&tcon->num_opens);
if (rc) {
cFYI(1, "Error in Open = %d", rc);
@@ -1388,7 +1435,7 @@ CIFSSMBRead(const int xid, struct cifsTconInfo *tcon, const int netfid,
iov[0].iov_base = (char *)pSMB;
iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
- &resp_buf_type, CIFS_STD_OP | CIFS_LOG_ERROR);
+ &resp_buf_type, CIFS_LOG_ERROR);
cifs_stats_inc(&tcon->num_reads);
pSMBr = (READ_RSP *)iov[0].iov_base;
if (rc) {
@@ -1663,7 +1710,8 @@ int
CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
const __u16 smb_file_id, const __u64 len,
const __u64 offset, const __u32 numUnlock,
- const __u32 numLock, const __u8 lockType, const bool waitFlag)
+ const __u32 numLock, const __u8 lockType,
+ const bool waitFlag, const __u8 oplock_level)
{
int rc = 0;
LOCK_REQ *pSMB = NULL;
@@ -1691,6 +1739,7 @@ CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
pSMB->NumberOfLocks = cpu_to_le16(numLock);
pSMB->NumberOfUnlocks = cpu_to_le16(numUnlock);
pSMB->LockType = lockType;
+ pSMB->OplockLevel = oplock_level;
pSMB->AndXCommand = 0xFF; /* none */
pSMB->Fid = smb_file_id; /* netfid stays le */
@@ -3087,7 +3136,7 @@ CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type,
- CIFS_STD_OP);
+ 0);
cifs_stats_inc(&tcon->num_acl_get);
if (rc) {
cFYI(1, "Send error in QuerySecDesc = %d", rc);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 9f59887badd2..8d4657596301 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -52,6 +52,9 @@
#define CIFS_PORT 445
#define RFC1001_PORT 139
+/* SMB echo "timeout" -- FIXME: tunable? */
+#define SMB_ECHO_INTERVAL (60 * HZ)
+
extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
unsigned char *p24);
@@ -152,6 +155,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
/* before reconnecting the tcp session, mark the smb session (uid)
and the tid bad so they are not used until reconnected */
+ cFYI(1, "%s: marking sessions and tcons for reconnect", __func__);
spin_lock(&cifs_tcp_ses_lock);
list_for_each(tmp, &server->smb_ses_list) {
ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
@@ -163,7 +167,9 @@ cifs_reconnect(struct TCP_Server_Info *server)
}
}
spin_unlock(&cifs_tcp_ses_lock);
+
/* do not want to be sending data on a socket we are freeing */
+ cFYI(1, "%s: tearing down socket", __func__);
mutex_lock(&server->srv_mutex);
if (server->ssocket) {
cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
@@ -180,22 +186,20 @@ cifs_reconnect(struct TCP_Server_Info *server)
kfree(server->session_key.response);
server->session_key.response = NULL;
server->session_key.len = 0;
+ server->lstrp = jiffies;
+ mutex_unlock(&server->srv_mutex);
+ /* mark submitted MIDs for retry and issue callback */
+ cFYI(1, "%s: issuing mid callbacks", __func__);
spin_lock(&GlobalMid_Lock);
- list_for_each(tmp, &server->pending_mid_q) {
- mid_entry = list_entry(tmp, struct
- mid_q_entry,
- qhead);
- if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
- /* Mark other intransit requests as needing
- retry so we do not immediately mark the
- session bad again (ie after we reconnect
- below) as they timeout too */
+ list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
+ mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+ if (mid_entry->midState == MID_REQUEST_SUBMITTED)
mid_entry->midState = MID_RETRY_NEEDED;
- }
+ list_del_init(&mid_entry->qhead);
+ mid_entry->callback(mid_entry);
}
spin_unlock(&GlobalMid_Lock);
- mutex_unlock(&server->srv_mutex);
while ((server->tcpStatus != CifsExiting) &&
(server->tcpStatus != CifsGood)) {
@@ -212,10 +216,9 @@ cifs_reconnect(struct TCP_Server_Info *server)
if (server->tcpStatus != CifsExiting)
server->tcpStatus = CifsGood;
spin_unlock(&GlobalMid_Lock);
- /* atomic_set(&server->inFlight,0);*/
- wake_up(&server->response_q);
}
}
+
return rc;
}
@@ -334,6 +337,26 @@ static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
}
+static void
+cifs_echo_request(struct work_struct *work)
+{
+ int rc;
+ struct TCP_Server_Info *server = container_of(work,
+ struct TCP_Server_Info, echo.work);
+
+ /* no need to ping if we got a response recently */
+ if (time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
+ goto requeue_echo;
+
+ rc = CIFSSMBEcho(server);
+ if (rc)
+ cFYI(1, "Unable to send echo request to server: %s",
+ server->hostname);
+
+requeue_echo:
+ queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL);
+}
+
static int
cifs_demultiplex_thread(struct TCP_Server_Info *server)
{
@@ -345,8 +368,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
struct msghdr smb_msg;
struct kvec iov;
struct socket *csocket = server->ssocket;
- struct list_head *tmp;
- struct cifsSesInfo *ses;
+ struct list_head *tmp, *tmp2;
struct task_struct *task_to_wake = NULL;
struct mid_q_entry *mid_entry;
char temp;
@@ -399,7 +421,20 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
smb_msg.msg_control = NULL;
smb_msg.msg_controllen = 0;
pdu_length = 4; /* enough to get RFC1001 header */
+
incomplete_rcv:
+ if (echo_retries > 0 &&
+ time_after(jiffies, server->lstrp +
+ (echo_retries * SMB_ECHO_INTERVAL))) {
+ cERROR(1, "Server %s has not responded in %d seconds. "
+ "Reconnecting...", server->hostname,
+ (echo_retries * SMB_ECHO_INTERVAL / HZ));
+ cifs_reconnect(server);
+ csocket = server->ssocket;
+ wake_up(&server->response_q);
+ continue;
+ }
+
length =
kernel_recvmsg(csocket, &smb_msg,
&iov, 1, pdu_length, 0 /* BB other flags? */);
@@ -559,10 +594,11 @@ incomplete_rcv:
continue;
}
+ mid_entry = NULL;
+ server->lstrp = jiffies;
- task_to_wake = NULL;
spin_lock(&GlobalMid_Lock);
- list_for_each(tmp, &server->pending_mid_q) {
+ list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
if ((mid_entry->mid == smb_buffer->Mid) &&
@@ -603,20 +639,19 @@ incomplete_rcv:
mid_entry->resp_buf = smb_buffer;
mid_entry->largeBuf = isLargeBuf;
multi_t2_fnd:
- task_to_wake = mid_entry->tsk;
mid_entry->midState = MID_RESPONSE_RECEIVED;
+ list_del_init(&mid_entry->qhead);
+ mid_entry->callback(mid_entry);
#ifdef CONFIG_CIFS_STATS2
mid_entry->when_received = jiffies;
#endif
- /* so we do not time out requests to server
- which is still responding (since server could
- be busy but not dead) */
- server->lstrp = jiffies;
break;
}
+ mid_entry = NULL;
}
spin_unlock(&GlobalMid_Lock);
- if (task_to_wake) {
+
+ if (mid_entry != NULL) {
/* Was previous buf put in mpx struct for multi-rsp? */
if (!isMultiRsp) {
/* smb buffer will be freed by user thread */
@@ -625,11 +660,10 @@ multi_t2_fnd:
else
smallbuf = NULL;
}
- wake_up_process(task_to_wake);
} else if (!is_valid_oplock_break(smb_buffer, server) &&
!isMultiRsp) {
cERROR(1, "No task to wake, unknown frame received! "
- "NumMids %d", midCount.counter);
+ "NumMids %d", atomic_read(&midCount));
cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
sizeof(struct smb_hdr));
#ifdef CONFIG_CIFS_DEBUG2
@@ -677,44 +711,16 @@ multi_t2_fnd:
if (smallbuf) /* no sense logging a debug message if NULL */
cifs_small_buf_release(smallbuf);
- /*
- * BB: we shouldn't have to do any of this. It shouldn't be
- * possible to exit from the thread with active SMB sessions
- */
- spin_lock(&cifs_tcp_ses_lock);
- if (list_empty(&server->pending_mid_q)) {
- /* loop through server session structures attached to this and
- mark them dead */
- list_for_each(tmp, &server->smb_ses_list) {
- ses = list_entry(tmp, struct cifsSesInfo,
- smb_ses_list);
- ses->status = CifsExiting;
- ses->server = NULL;
- }
- spin_unlock(&cifs_tcp_ses_lock);
- } else {
- /* although we can not zero the server struct pointer yet,
- since there are active requests which may depnd on them,
- mark the corresponding SMB sessions as exiting too */
- list_for_each(tmp, &server->smb_ses_list) {
- ses = list_entry(tmp, struct cifsSesInfo,
- smb_ses_list);
- ses->status = CifsExiting;
- }
-
+ if (!list_empty(&server->pending_mid_q)) {
spin_lock(&GlobalMid_Lock);
- list_for_each(tmp, &server->pending_mid_q) {
- mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
- if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
- cFYI(1, "Clearing Mid 0x%x - waking up ",
+ list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
+ mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+ cFYI(1, "Clearing Mid 0x%x - issuing callback",
mid_entry->mid);
- task_to_wake = mid_entry->tsk;
- if (task_to_wake)
- wake_up_process(task_to_wake);
- }
+ list_del_init(&mid_entry->qhead);
+ mid_entry->callback(mid_entry);
}
spin_unlock(&GlobalMid_Lock);
- spin_unlock(&cifs_tcp_ses_lock);
/* 1/8th of sec is more than enough time for them to exit */
msleep(125);
}
@@ -732,18 +738,6 @@ multi_t2_fnd:
coming home not much else we can do but free the memory */
}
- /* last chance to mark ses pointers invalid
- if there are any pointing to this (e.g
- if a crazy root user tried to kill cifsd
- kernel thread explicitly this might happen) */
- /* BB: This shouldn't be necessary, see above */
- spin_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp, &server->smb_ses_list) {
- ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
- ses->server = NULL;
- }
- spin_unlock(&cifs_tcp_ses_lock);
-
kfree(server->hostname);
task_to_wake = xchg(&server->tsk, NULL);
kfree(server);
@@ -1612,6 +1606,8 @@ cifs_put_tcp_session(struct TCP_Server_Info *server)
list_del_init(&server->tcp_ses_list);
spin_unlock(&cifs_tcp_ses_lock);
+ cancel_delayed_work_sync(&server->echo);
+
spin_lock(&GlobalMid_Lock);
server->tcpStatus = CifsExiting;
spin_unlock(&GlobalMid_Lock);
@@ -1701,8 +1697,10 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
tcp_ses->session_estab = false;
tcp_ses->sequence_number = 0;
+ tcp_ses->lstrp = jiffies;
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);
/*
* at this point we are the only ones with the pointer
@@ -1751,6 +1749,9 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
cifs_fscache_get_client_cookie(tcp_ses);
+ /* queue echo request delayed work */
+ queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
+
return tcp_ses;
out_err_crypto_release:
@@ -2965,7 +2966,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
bcc_ptr++; /* skip password */
/* already aligned so no need to do it below */
} else {
- pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
+ pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
/* BB FIXME add code to fail this if NTLMv2 or Kerberos
specified as required (when that support is added to
the vfs in the future) as only NTLM or the much
@@ -2983,7 +2984,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
#endif /* CIFS_WEAK_PW_HASH */
SMBNTencrypt(tcon->password, ses->server->cryptkey, bcc_ptr);
- bcc_ptr += CIFS_SESS_KEY_SIZE;
+ bcc_ptr += CIFS_AUTH_RESP_SIZE;
if (ses->capabilities & CAP_UNICODE) {
/* must align unicode strings */
*bcc_ptr = 0; /* null byte password */
@@ -3021,7 +3022,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
pSMB->ByteCount = cpu_to_le16(count);
rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
- CIFS_STD_OP);
+ 0);
/* above now done in SendReceive */
if ((rc == 0) && (tcon != NULL)) {
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index d843631c028d..bd2a028af833 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -726,12 +726,12 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
/* BB we could chain these into one lock request BB */
rc = CIFSSMBLock(xid, tcon, netfid, length, pfLock->fl_start,
- 0, 1, lockType, 0 /* wait flag */ );
+ 0, 1, lockType, 0 /* wait flag */, 0);
if (rc == 0) {
rc = CIFSSMBLock(xid, tcon, netfid, length,
pfLock->fl_start, 1 /* numUnlock */ ,
0 /* numLock */ , lockType,
- 0 /* wait flag */ );
+ 0 /* wait flag */, 0);
pfLock->fl_type = F_UNLCK;
if (rc != 0)
cERROR(1, "Error unlocking previously locked "
@@ -748,13 +748,13 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
rc = CIFSSMBLock(xid, tcon, netfid, length,
pfLock->fl_start, 0, 1,
lockType | LOCKING_ANDX_SHARED_LOCK,
- 0 /* wait flag */);
+ 0 /* wait flag */, 0);
if (rc == 0) {
rc = CIFSSMBLock(xid, tcon, netfid,
length, pfLock->fl_start, 1, 0,
lockType |
LOCKING_ANDX_SHARED_LOCK,
- 0 /* wait flag */);
+ 0 /* wait flag */, 0);
pfLock->fl_type = F_RDLCK;
if (rc != 0)
cERROR(1, "Error unlocking "
@@ -797,8 +797,8 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
if (numLock) {
rc = CIFSSMBLock(xid, tcon, netfid, length,
- pfLock->fl_start,
- 0, numLock, lockType, wait_flag);
+ pfLock->fl_start, 0, numLock, lockType,
+ wait_flag, 0);
if (rc == 0) {
/* For Windows locks we must store them. */
@@ -818,9 +818,9 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
(pfLock->fl_start + length) >=
(li->offset + li->length)) {
stored_rc = CIFSSMBLock(xid, tcon,
- netfid,
- li->length, li->offset,
- 1, 0, li->type, false);
+ netfid, li->length,
+ li->offset, 1, 0,
+ li->type, false, 0);
if (stored_rc)
rc = stored_rc;
else {
@@ -839,29 +839,6 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
return rc;
}
-/*
- * Set the timeout on write requests past EOF. For some servers (Windows)
- * these calls can be very long.
- *
- * If we're writing >10M past the EOF we give a 180s timeout. Anything less
- * than that gets a 45s timeout. Writes not past EOF get 15s timeouts.
- * The 10M cutoff is totally arbitrary. A better scheme for this would be
- * welcome if someone wants to suggest one.
- *
- * We may be able to do a better job with this if there were some way to
- * declare that a file should be sparse.
- */
-static int
-cifs_write_timeout(struct cifsInodeInfo *cifsi, loff_t offset)
-{
- if (offset <= cifsi->server_eof)
- return CIFS_STD_OP;
- else if (offset > (cifsi->server_eof + (10 * 1024 * 1024)))
- return CIFS_VLONG_OP;
- else
- return CIFS_LONG_OP;
-}
-
/* update the file size (if needed) after a write */
static void
cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
@@ -882,7 +859,7 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
unsigned int total_written;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
- int xid, long_op;
+ int xid;
struct cifsFileInfo *open_file;
struct cifsInodeInfo *cifsi = CIFS_I(inode);
@@ -903,7 +880,6 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
xid = GetXid();
- long_op = cifs_write_timeout(cifsi, *poffset);
for (total_written = 0; write_size > total_written;
total_written += bytes_written) {
rc = -EAGAIN;
@@ -931,7 +907,7 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
min_t(const int, cifs_sb->wsize,
write_size - total_written),
*poffset, &bytes_written,
- NULL, write_data + total_written, long_op);
+ NULL, write_data + total_written, 0);
}
if (rc || (bytes_written == 0)) {
if (total_written)
@@ -944,8 +920,6 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
cifs_update_eof(cifsi, *poffset, bytes_written);
*poffset += bytes_written;
}
- long_op = CIFS_STD_OP; /* subsequent writes fast -
- 15 seconds is plenty */
}
cifs_stats_bytes_written(pTcon, total_written);
@@ -974,7 +948,7 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file,
unsigned int total_written;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
- int xid, long_op;
+ int xid;
struct dentry *dentry = open_file->dentry;
struct cifsInodeInfo *cifsi = CIFS_I(dentry->d_inode);
@@ -987,7 +961,6 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file,
xid = GetXid();
- long_op = cifs_write_timeout(cifsi, *poffset);
for (total_written = 0; write_size > total_written;
total_written += bytes_written) {
rc = -EAGAIN;
@@ -1017,7 +990,7 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file,
rc = CIFSSMBWrite2(xid, pTcon,
open_file->netfid, len,
*poffset, &bytes_written,
- iov, 1, long_op);
+ iov, 1, 0);
} else
rc = CIFSSMBWrite(xid, pTcon,
open_file->netfid,
@@ -1025,7 +998,7 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file,
write_size - total_written),
*poffset, &bytes_written,
write_data + total_written,
- NULL, long_op);
+ NULL, 0);
}
if (rc || (bytes_written == 0)) {
if (total_written)
@@ -1038,8 +1011,6 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file,
cifs_update_eof(cifsi, *poffset, bytes_written);
*poffset += bytes_written;
}
- long_op = CIFS_STD_OP; /* subsequent writes fast -
- 15 seconds is plenty */
}
cifs_stats_bytes_written(pTcon, total_written);
@@ -1239,7 +1210,7 @@ static int cifs_writepages(struct address_space *mapping,
struct pagevec pvec;
int rc = 0;
int scanned = 0;
- int xid, long_op;
+ int xid;
cifs_sb = CIFS_SB(mapping->host->i_sb);
@@ -1377,43 +1348,67 @@ retry:
break;
}
if (n_iov) {
+retry_write:
open_file = find_writable_file(CIFS_I(mapping->host),
false);
if (!open_file) {
cERROR(1, "No writable handles for inode");
rc = -EBADF;
} else {
- long_op = cifs_write_timeout(cifsi, offset);
rc = CIFSSMBWrite2(xid, tcon, open_file->netfid,
bytes_to_write, offset,
&bytes_written, iov, n_iov,
- long_op);
+ 0);
cifsFileInfo_put(open_file);
- cifs_update_eof(cifsi, offset, bytes_written);
}
- if (rc || bytes_written < bytes_to_write) {
- cERROR(1, "Write2 ret %d, wrote %d",
- rc, bytes_written);
- mapping_set_error(mapping, rc);
- } else {
+ cFYI(1, "Write2 rc=%d, wrote=%u", rc, bytes_written);
+
+ /*
+ * For now, treat a short write as if nothing got
+ * written. A zero length write however indicates
+ * ENOSPC or EFBIG. We have no way to know which
+ * though, so call it ENOSPC for now. EFBIG would
+ * get translated to AS_EIO anyway.
+ *
+ * FIXME: make it take into account the data that did
+ * get written
+ */
+ if (rc == 0) {
+ if (bytes_written == 0)
+ rc = -ENOSPC;
+ else if (bytes_written < bytes_to_write)
+ rc = -EAGAIN;
+ }
+
+ /* retry on data-integrity flush */
+ if (wbc->sync_mode == WB_SYNC_ALL && rc == -EAGAIN)
+ goto retry_write;
+
+ /* fix the stats and EOF */
+ if (bytes_written > 0) {
cifs_stats_bytes_written(tcon, bytes_written);
+ cifs_update_eof(cifsi, offset, bytes_written);
}
for (i = 0; i < n_iov; i++) {
page = pvec.pages[first + i];
- /* Should we also set page error on
- success rc but too little data written? */
- /* BB investigate retry logic on temporary
- server crash cases and how recovery works
- when page marked as error */
- if (rc)
+ /* on retryable write error, redirty page */
+ if (rc == -EAGAIN)
+ redirty_page_for_writepage(wbc, page);
+ else if (rc != 0)
SetPageError(page);
kunmap(page);
unlock_page(page);
end_page_writeback(page);
page_cache_release(page);
}
+
+ if (rc != -EAGAIN)
+ mapping_set_error(mapping, rc);
+ else
+ rc = 0;
+
if ((wbc->nr_to_write -= n_iov) <= 0)
done = 1;
index = next;
@@ -2192,7 +2187,8 @@ void cifs_oplock_break(struct work_struct *work)
*/
if (!cfile->oplock_break_cancelled) {
rc = CIFSSMBLock(0, tlink_tcon(cfile->tlink), cfile->netfid, 0,
- 0, 0, 0, LOCKING_ANDX_OPLOCK_RELEASE, false);
+ 0, 0, 0, LOCKING_ANDX_OPLOCK_RELEASE, false,
+ cinode->clientCanCacheRead ? 1 : 0);
cFYI(1, "Oplock release rc = %d", rc);
}
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 43f10281bc19..09bfcf08a90f 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -571,7 +571,7 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv)
pCifsInode = CIFS_I(netfile->dentry->d_inode);
cifs_set_oplock_level(pCifsInode,
- pSMB->OplockLevel);
+ pSMB->OplockLevel ? OPLOCK_READ : 0);
/*
* cifs_oplock_break_put() can't be called
* from here. Get reference after queueing
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index eb746486e49e..1cffd82c4f13 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -879,7 +879,7 @@ ssetup_ntlmssp_authenticate:
BCC_LE(smb_buf) = cpu_to_le16(count);
rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
- CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
+ CIFS_LOG_ERROR);
/* SMB request buf freed in SendReceive2 */
pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 59ca81b16919..c8e2808cd5e6 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -36,7 +36,13 @@
extern mempool_t *cifs_mid_poolp;
-static struct mid_q_entry *
+static void
+wake_up_task(struct mid_q_entry *mid)
+{
+ wake_up_process(mid->callback_data);
+}
+
+struct mid_q_entry *
AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server)
{
struct mid_q_entry *temp;
@@ -58,28 +64,28 @@ AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server)
/* do_gettimeofday(&temp->when_sent);*/ /* easier to use jiffies */
/* when mid allocated can be before when sent */
temp->when_alloc = jiffies;
- temp->tsk = current;
+
+ /*
+ * The default is for the mid to be synchronous, so the
+ * default callback just wakes up the current task.
+ */
+ temp->callback = wake_up_task;
+ temp->callback_data = current;
}
- spin_lock(&GlobalMid_Lock);
- list_add_tail(&temp->qhead, &server->pending_mid_q);
atomic_inc(&midCount);
temp->midState = MID_REQUEST_ALLOCATED;
- spin_unlock(&GlobalMid_Lock);
return temp;
}
-static void
+void
DeleteMidQEntry(struct mid_q_entry *midEntry)
{
#ifdef CONFIG_CIFS_STATS2
unsigned long now;
#endif
- spin_lock(&GlobalMid_Lock);
midEntry->midState = MID_FREE;
- list_del(&midEntry->qhead);
atomic_dec(&midCount);
- spin_unlock(&GlobalMid_Lock);
if (midEntry->largeBuf)
cifs_buf_release(midEntry->resp_buf);
else
@@ -103,6 +109,16 @@ DeleteMidQEntry(struct mid_q_entry *midEntry)
mempool_free(midEntry, cifs_mid_poolp);
}
+static void
+delete_mid(struct mid_q_entry *mid)
+{
+ spin_lock(&GlobalMid_Lock);
+ list_del(&mid->qhead);
+ spin_unlock(&GlobalMid_Lock);
+
+ DeleteMidQEntry(mid);
+}
+
static int
smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec)
{
@@ -244,31 +260,31 @@ smb_send(struct TCP_Server_Info *server, struct smb_hdr *smb_buffer,
return smb_sendv(server, &iov, 1);
}
-static int wait_for_free_request(struct cifsSesInfo *ses, const int long_op)
+static int wait_for_free_request(struct TCP_Server_Info *server,
+ const int long_op)
{
if (long_op == CIFS_ASYNC_OP) {
/* oplock breaks must not be held up */
- atomic_inc(&ses->server->inFlight);
+ atomic_inc(&server->inFlight);
return 0;
}
spin_lock(&GlobalMid_Lock);
while (1) {
- if (atomic_read(&ses->server->inFlight) >=
- cifs_max_pending){
+ if (atomic_read(&server->inFlight) >= cifs_max_pending) {
spin_unlock(&GlobalMid_Lock);
#ifdef CONFIG_CIFS_STATS2
- atomic_inc(&ses->server->num_waiters);
+ atomic_inc(&server->num_waiters);
#endif
- wait_event(ses->server->request_q,
- atomic_read(&ses->server->inFlight)
+ wait_event(server->request_q,
+ atomic_read(&server->inFlight)
< cifs_max_pending);
#ifdef CONFIG_CIFS_STATS2
- atomic_dec(&ses->server->num_waiters);
+ atomic_dec(&server->num_waiters);
#endif
spin_lock(&GlobalMid_Lock);
} else {
- if (ses->server->tcpStatus == CifsExiting) {
+ if (server->tcpStatus == CifsExiting) {
spin_unlock(&GlobalMid_Lock);
return -ENOENT;
}
@@ -278,7 +294,7 @@ static int wait_for_free_request(struct cifsSesInfo *ses, const int long_op)
/* update # of requests on the wire to server */
if (long_op != CIFS_BLOCKING_OP)
- atomic_inc(&ses->server->inFlight);
+ atomic_inc(&server->inFlight);
spin_unlock(&GlobalMid_Lock);
break;
}
@@ -308,53 +324,81 @@ static int allocate_mid(struct cifsSesInfo *ses, struct smb_hdr *in_buf,
*ppmidQ = AllocMidQEntry(in_buf, ses->server);
if (*ppmidQ == NULL)
return -ENOMEM;
+ spin_lock(&GlobalMid_Lock);
+ list_add_tail(&(*ppmidQ)->qhead, &ses->server->pending_mid_q);
+ spin_unlock(&GlobalMid_Lock);
return 0;
}
-static int wait_for_response(struct cifsSesInfo *ses,
- struct mid_q_entry *midQ,
- unsigned long timeout,
- unsigned long time_to_wait)
+static int
+wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ)
{
- unsigned long curr_timeout;
+ int error;
- for (;;) {
- curr_timeout = timeout + jiffies;
- wait_event_timeout(ses->server->response_q,
- midQ->midState != MID_REQUEST_SUBMITTED, timeout);
+ error = wait_event_killable(server->response_q,
+ midQ->midState != MID_REQUEST_SUBMITTED);
+ if (error < 0)
+ return -ERESTARTSYS;
- if (time_after(jiffies, curr_timeout) &&
- (midQ->midState == MID_REQUEST_SUBMITTED) &&
- ((ses->server->tcpStatus == CifsGood) ||
- (ses->server->tcpStatus == CifsNew))) {
+ return 0;
+}
- unsigned long lrt;
- /* We timed out. Is the server still
- sending replies ? */
- spin_lock(&GlobalMid_Lock);
- lrt = ses->server->lstrp;
- spin_unlock(&GlobalMid_Lock);
+/*
+ * Send a SMB request and set the callback function in the mid to handle
+ * the result. Caller is responsible for dealing with timeouts.
+ */
+int
+cifs_call_async(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
+ mid_callback_t *callback, void *cbdata)
+{
+ int rc;
+ struct mid_q_entry *mid;
- /* Calculate time_to_wait past last receive time.
- Although we prefer not to time out if the
- server is still responding - we will time
- out if the server takes more than 15 (or 45
- or 180) seconds to respond to this request
- and has not responded to any request from
- other threads on the client within 10 seconds */
- lrt += time_to_wait;
- if (time_after(jiffies, lrt)) {
- /* No replies for time_to_wait. */
- cERROR(1, "server not responding");
- return -1;
- }
- } else {
- return 0;
- }
+ rc = wait_for_free_request(server, CIFS_ASYNC_OP);
+ if (rc)
+ return rc;
+
+ mutex_lock(&server->srv_mutex);
+ mid = AllocMidQEntry(in_buf, server);
+ if (mid == NULL) {
+ mutex_unlock(&server->srv_mutex);
+ return -ENOMEM;
}
-}
+ /* put it on the pending_mid_q */
+ spin_lock(&GlobalMid_Lock);
+ list_add_tail(&mid->qhead, &server->pending_mid_q);
+ spin_unlock(&GlobalMid_Lock);
+
+ rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
+ if (rc) {
+ mutex_unlock(&server->srv_mutex);
+ goto out_err;
+ }
+
+ mid->callback = callback;
+ mid->callback_data = cbdata;
+ mid->midState = MID_REQUEST_SUBMITTED;
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&server->inSend);
+#endif
+ rc = smb_send(server, in_buf, in_buf->smb_buf_length);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&server->inSend);
+ mid->when_sent = jiffies;
+#endif
+ mutex_unlock(&server->srv_mutex);
+ if (rc)
+ goto out_err;
+
+ return rc;
+out_err:
+ delete_mid(mid);
+ atomic_dec(&server->inFlight);
+ wake_up(&server->request_q);
+ return rc;
+}
/*
*
@@ -382,6 +426,81 @@ SendReceiveNoRsp(const unsigned int xid, struct cifsSesInfo *ses,
return rc;
}
+static int
+sync_mid_result(struct mid_q_entry *mid, struct TCP_Server_Info *server)
+{
+ int rc = 0;
+
+ cFYI(1, "%s: cmd=%d mid=%d state=%d", __func__, mid->command,
+ mid->mid, mid->midState);
+
+ spin_lock(&GlobalMid_Lock);
+ /* ensure that it's no longer on the pending_mid_q */
+ list_del_init(&mid->qhead);
+
+ switch (mid->midState) {
+ case MID_RESPONSE_RECEIVED:
+ spin_unlock(&GlobalMid_Lock);
+ return rc;
+ case MID_REQUEST_SUBMITTED:
+ /* socket is going down, reject all calls */
+ if (server->tcpStatus == CifsExiting) {
+ cERROR(1, "%s: canceling mid=%d cmd=0x%x state=%d",
+ __func__, mid->mid, mid->command, mid->midState);
+ rc = -EHOSTDOWN;
+ break;
+ }
+ case MID_RETRY_NEEDED:
+ rc = -EAGAIN;
+ break;
+ default:
+ cERROR(1, "%s: invalid mid state mid=%d state=%d", __func__,
+ mid->mid, mid->midState);
+ rc = -EIO;
+ }
+ spin_unlock(&GlobalMid_Lock);
+
+ DeleteMidQEntry(mid);
+ return rc;
+}
+
+/*
+ * An NT cancel request header looks just like the original request except:
+ *
+ * The Command is SMB_COM_NT_CANCEL
+ * The WordCount is zeroed out
+ * The ByteCount is zeroed out
+ *
+ * This function mangles an existing request buffer into a
+ * SMB_COM_NT_CANCEL request and then sends it.
+ */
+static int
+send_nt_cancel(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
+ struct mid_q_entry *mid)
+{
+ int rc = 0;
+
+ /* -4 for RFC1001 length and +2 for BCC field */
+ in_buf->smb_buf_length = sizeof(struct smb_hdr) - 4 + 2;
+ in_buf->Command = SMB_COM_NT_CANCEL;
+ in_buf->WordCount = 0;
+ BCC_LE(in_buf) = 0;
+
+ mutex_lock(&server->srv_mutex);
+ rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
+ if (rc) {
+ mutex_unlock(&server->srv_mutex);
+ return rc;
+ }
+ rc = smb_send(server, in_buf, in_buf->smb_buf_length);
+ mutex_unlock(&server->srv_mutex);
+
+ cFYI(1, "issued NT_CANCEL for mid %u, rc = %d",
+ in_buf->Mid, rc);
+
+ return rc;
+}
+
int
SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
struct kvec *iov, int n_vec, int *pRespBufType /* ret */,
@@ -390,7 +509,6 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
int rc = 0;
int long_op;
unsigned int receive_len;
- unsigned long timeout;
struct mid_q_entry *midQ;
struct smb_hdr *in_buf = iov[0].iov_base;
@@ -413,7 +531,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
to the same server. We may make this configurable later or
use ses->maxReq */
- rc = wait_for_free_request(ses, long_op);
+ rc = wait_for_free_request(ses->server, long_op);
if (rc) {
cifs_small_buf_release(in_buf);
return rc;
@@ -457,65 +575,20 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
if (rc < 0)
goto out;
- if (long_op == CIFS_STD_OP)
- timeout = 15 * HZ;
- else if (long_op == CIFS_VLONG_OP) /* e.g. slow writes past EOF */
- timeout = 180 * HZ;
- else if (long_op == CIFS_LONG_OP)
- timeout = 45 * HZ; /* should be greater than
- servers oplock break timeout (about 43 seconds) */
- else if (long_op == CIFS_ASYNC_OP)
+ if (long_op == CIFS_ASYNC_OP)
goto out;
- else if (long_op == CIFS_BLOCKING_OP)
- timeout = 0x7FFFFFFF; /* large, but not so large as to wrap */
- else {
- cERROR(1, "unknown timeout flag %d", long_op);
- rc = -EIO;
- goto out;
- }
-
- /* wait for 15 seconds or until woken up due to response arriving or
- due to last connection to this server being unmounted */
- if (signal_pending(current)) {
- /* if signal pending do not hold up user for full smb timeout
- but we still give response a chance to complete */
- timeout = 2 * HZ;
- }
-
- /* No user interrupts in wait - wreaks havoc with performance */
- wait_for_response(ses, midQ, timeout, 10 * HZ);
-
- spin_lock(&GlobalMid_Lock);
- if (midQ->resp_buf == NULL) {
- cERROR(1, "No response to cmd %d mid %d",
- midQ->command, midQ->mid);
- if (midQ->midState == MID_REQUEST_SUBMITTED) {
- if (ses->server->tcpStatus == CifsExiting)
- rc = -EHOSTDOWN;
- else {
- ses->server->tcpStatus = CifsNeedReconnect;
- midQ->midState = MID_RETRY_NEEDED;
- }
- }
+ rc = wait_for_response(ses->server, midQ);
+ if (rc != 0)
+ goto out;
- if (rc != -EHOSTDOWN) {
- if (midQ->midState == MID_RETRY_NEEDED) {
- rc = -EAGAIN;
- cFYI(1, "marking request for retry");
- } else {
- rc = -EIO;
- }
- }
- spin_unlock(&GlobalMid_Lock);
- DeleteMidQEntry(midQ);
- /* Update # of requests on wire to server */
+ rc = sync_mid_result(midQ, ses->server);
+ if (rc != 0) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
- spin_unlock(&GlobalMid_Lock);
receive_len = midQ->resp_buf->smb_buf_length;
if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
@@ -564,14 +637,14 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
if ((flags & CIFS_NO_RESP) == 0)
midQ->resp_buf = NULL; /* mark it so buf will
not be freed by
- DeleteMidQEntry */
+ delete_mid */
} else {
rc = -EIO;
cFYI(1, "Bad MID state?");
}
out:
- DeleteMidQEntry(midQ);
+ delete_mid(midQ);
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
@@ -585,7 +658,6 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
{
int rc = 0;
unsigned int receive_len;
- unsigned long timeout;
struct mid_q_entry *midQ;
if (ses == NULL) {
@@ -610,7 +682,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
return -EIO;
}
- rc = wait_for_free_request(ses, long_op);
+ rc = wait_for_free_request(ses->server, long_op);
if (rc)
return rc;
@@ -649,64 +721,20 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
if (rc < 0)
goto out;
- if (long_op == CIFS_STD_OP)
- timeout = 15 * HZ;
- /* wait for 15 seconds or until woken up due to response arriving or
- due to last connection to this server being unmounted */
- else if (long_op == CIFS_ASYNC_OP)
+ if (long_op == CIFS_ASYNC_OP)
goto out;
- else if (long_op == CIFS_VLONG_OP) /* writes past EOF can be slow */
- timeout = 180 * HZ;
- else if (long_op == CIFS_LONG_OP)
- timeout = 45 * HZ; /* should be greater than
- servers oplock break timeout (about 43 seconds) */
- else if (long_op == CIFS_BLOCKING_OP)
- timeout = 0x7FFFFFFF; /* large but no so large as to wrap */
- else {
- cERROR(1, "unknown timeout flag %d", long_op);
- rc = -EIO;
- goto out;
- }
- if (signal_pending(current)) {
- /* if signal pending do not hold up user for full smb timeout
- but we still give response a chance to complete */
- timeout = 2 * HZ;
- }
-
- /* No user interrupts in wait - wreaks havoc with performance */
- wait_for_response(ses, midQ, timeout, 10 * HZ);
-
- spin_lock(&GlobalMid_Lock);
- if (midQ->resp_buf == NULL) {
- cERROR(1, "No response for cmd %d mid %d",
- midQ->command, midQ->mid);
- if (midQ->midState == MID_REQUEST_SUBMITTED) {
- if (ses->server->tcpStatus == CifsExiting)
- rc = -EHOSTDOWN;
- else {
- ses->server->tcpStatus = CifsNeedReconnect;
- midQ->midState = MID_RETRY_NEEDED;
- }
- }
+ rc = wait_for_response(ses->server, midQ);
+ if (rc != 0)
+ goto out;
- if (rc != -EHOSTDOWN) {
- if (midQ->midState == MID_RETRY_NEEDED) {
- rc = -EAGAIN;
- cFYI(1, "marking request for retry");
- } else {
- rc = -EIO;
- }
- }
- spin_unlock(&GlobalMid_Lock);
- DeleteMidQEntry(midQ);
- /* Update # of requests on wire to server */
+ rc = sync_mid_result(midQ, ses->server);
+ if (rc != 0) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
- spin_unlock(&GlobalMid_Lock);
receive_len = midQ->resp_buf->smb_buf_length;
if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
@@ -755,36 +783,13 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
}
out:
- DeleteMidQEntry(midQ);
+ delete_mid(midQ);
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
-/* Send an NT_CANCEL SMB to cause the POSIX blocking lock to return. */
-
-static int
-send_nt_cancel(struct cifsTconInfo *tcon, struct smb_hdr *in_buf,
- struct mid_q_entry *midQ)
-{
- int rc = 0;
- struct cifsSesInfo *ses = tcon->ses;
- __u16 mid = in_buf->Mid;
-
- header_assemble(in_buf, SMB_COM_NT_CANCEL, tcon, 0);
- in_buf->Mid = mid;
- mutex_lock(&ses->server->srv_mutex);
- rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
- if (rc) {
- mutex_unlock(&ses->server->srv_mutex);
- return rc;
- }
- rc = smb_send(ses->server, in_buf, in_buf->smb_buf_length);
- mutex_unlock(&ses->server->srv_mutex);
- return rc;
-}
-
/* We send a LOCKINGX_CANCEL_LOCK to cause the Windows
blocking lock to return. */
@@ -807,7 +812,7 @@ send_lock_cancel(const unsigned int xid, struct cifsTconInfo *tcon,
pSMB->hdr.Mid = GetNextMid(ses->server);
return SendReceive(xid, ses, in_buf, out_buf,
- &bytes_returned, CIFS_STD_OP);
+ &bytes_returned, 0);
}
int
@@ -845,7 +850,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
return -EIO;
}
- rc = wait_for_free_request(ses, CIFS_BLOCKING_OP);
+ rc = wait_for_free_request(ses->server, CIFS_BLOCKING_OP);
if (rc)
return rc;
@@ -863,7 +868,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
if (rc) {
- DeleteMidQEntry(midQ);
+ delete_mid(midQ);
mutex_unlock(&ses->server->srv_mutex);
return rc;
}
@@ -880,7 +885,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
mutex_unlock(&ses->server->srv_mutex);
if (rc < 0) {
- DeleteMidQEntry(midQ);
+ delete_mid(midQ);
return rc;
}
@@ -899,10 +904,9 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
if (in_buf->Command == SMB_COM_TRANSACTION2) {
/* POSIX lock. We send a NT_CANCEL SMB to cause the
blocking lock to return. */
-
- rc = send_nt_cancel(tcon, in_buf, midQ);
+ rc = send_nt_cancel(ses->server, in_buf, midQ);
if (rc) {
- DeleteMidQEntry(midQ);
+ delete_mid(midQ);
return rc;
}
} else {
@@ -914,47 +918,22 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
/* If we get -ENOLCK back the lock may have
already been removed. Don't exit in this case. */
if (rc && rc != -ENOLCK) {
- DeleteMidQEntry(midQ);
+ delete_mid(midQ);
return rc;
}
}
- /* Wait 5 seconds for the response. */
- if (wait_for_response(ses, midQ, 5 * HZ, 5 * HZ) == 0) {
+ if (wait_for_response(ses->server, midQ) == 0) {
/* We got the response - restart system call. */
rstart = 1;
}
}
- spin_lock(&GlobalMid_Lock);
- if (midQ->resp_buf) {
- spin_unlock(&GlobalMid_Lock);
- receive_len = midQ->resp_buf->smb_buf_length;
- } else {
- cERROR(1, "No response for cmd %d mid %d",
- midQ->command, midQ->mid);
- if (midQ->midState == MID_REQUEST_SUBMITTED) {
- if (ses->server->tcpStatus == CifsExiting)
- rc = -EHOSTDOWN;
- else {
- ses->server->tcpStatus = CifsNeedReconnect;
- midQ->midState = MID_RETRY_NEEDED;
- }
- }
-
- if (rc != -EHOSTDOWN) {
- if (midQ->midState == MID_RETRY_NEEDED) {
- rc = -EAGAIN;
- cFYI(1, "marking request for retry");
- } else {
- rc = -EIO;
- }
- }
- spin_unlock(&GlobalMid_Lock);
- DeleteMidQEntry(midQ);
+ rc = sync_mid_result(midQ, ses->server);
+ if (rc != 0)
return rc;
- }
+ receive_len = midQ->resp_buf->smb_buf_length;
if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
cERROR(1, "Frame too large received. Length: %d Xid: %d",
receive_len, xid);
@@ -1001,7 +980,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
out:
- DeleteMidQEntry(midQ);
+ delete_mid(midQ);
if (rstart && rc == -EACCES)
return -ERESTARTSYS;
return rc;