diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-20 16:36:38 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-20 16:36:38 -0800 |
commit | 5cdec1fca2ff128ca0716dc1ef0fc0043e4ae8ab (patch) | |
tree | 35dbfed2dc57b80d18276413361c34905fe8312c /fs | |
parent | e55fdbd7414a3ee991d7081a256153f61ea98b9f (diff) | |
parent | 76dcc26f1d7f1c98c3f595379dcd9562f01bf38d (diff) |
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.c | 10 | ||||
-rw-r--r-- | fs/cifs/cifsacl.c | 13 | ||||
-rw-r--r-- | fs/cifs/cifsfs.c | 6 | ||||
-rw-r--r-- | fs/cifs/cifsfs.h | 2 | ||||
-rw-r--r-- | fs/cifs/cifsglob.h | 28 | ||||
-rw-r--r-- | fs/cifs/cifspdu.h | 15 | ||||
-rw-r--r-- | fs/cifs/cifsproto.h | 9 | ||||
-rw-r--r-- | fs/cifs/cifssmb.c | 59 | ||||
-rw-r--r-- | fs/cifs/connect.c | 149 | ||||
-rw-r--r-- | fs/cifs/file.c | 114 | ||||
-rw-r--r-- | fs/cifs/misc.c | 2 | ||||
-rw-r--r-- | fs/cifs/sess.c | 2 | ||||
-rw-r--r-- | fs/cifs/transport.c | 427 |
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; + } + + /* |