mempool_free(midEntry, cifs_mid_poolp);
}
-struct oplock_q_entry *
-AllocOplockQEntry(struct inode *pinode, __u16 fid, struct cifsTconInfo *tcon)
-{
- struct oplock_q_entry *temp;
- if ((pinode == NULL) || (tcon == NULL)) {
- cERROR(1, ("Null parms passed to AllocOplockQEntry"));
- return NULL;
- }
- temp = (struct oplock_q_entry *) kmem_cache_alloc(cifs_oplock_cachep,
- GFP_KERNEL);
- if (temp == NULL)
- return temp;
- else {
- temp->pinode = pinode;
- temp->tcon = tcon;
- temp->netfid = fid;
- spin_lock(&GlobalMid_Lock);
- list_add_tail(&temp->qhead, &GlobalOplock_Q);
- spin_unlock(&GlobalMid_Lock);
- }
- return temp;
-
-}
-
-void DeleteOplockQEntry(struct oplock_q_entry *oplockEntry)
-{
- spin_lock(&GlobalMid_Lock);
- /* should we check if list empty first? */
- list_del(&oplockEntry->qhead);
- spin_unlock(&GlobalMid_Lock);
- kmem_cache_free(cifs_oplock_cachep, oplockEntry);
-}
-
-
-void DeleteTconOplockQEntries(struct cifsTconInfo *tcon)
-{
- struct oplock_q_entry *temp;
-
- if (tcon == NULL)
- return;
-
- spin_lock(&GlobalMid_Lock);
- list_for_each_entry(temp, &GlobalOplock_Q, qhead) {
- if ((temp->tcon) && (temp->tcon == tcon)) {
- list_del(&temp->qhead);
- kmem_cache_free(cifs_oplock_cachep, temp);
- }
- }
- spin_unlock(&GlobalMid_Lock);
-}
-
-int
-smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
- unsigned int smb_buf_length, struct sockaddr *sin, bool noblocksnd)
-{
- int rc = 0;
- int i = 0;
- struct msghdr smb_msg;
- struct kvec iov;
- unsigned len = smb_buf_length + 4;
-
- if (ssocket == NULL)
- return -ENOTSOCK; /* BB eventually add reconnect code here */
- iov.iov_base = smb_buffer;
- iov.iov_len = len;
-
- smb_msg.msg_name = sin;
- smb_msg.msg_namelen = sizeof(struct sockaddr);
- smb_msg.msg_control = NULL;
- smb_msg.msg_controllen = 0;
- if (noblocksnd)
- smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL;
- else
- smb_msg.msg_flags = MSG_NOSIGNAL;
-
- /* smb header is converted in header_assemble. bcc and rest of SMB word
- area, and byte area if necessary, is converted to littleendian in
- cifssmb.c and RFC1001 len is converted to bigendian in smb_send
- Flags2 is converted in SendReceive */
-
- smb_buffer->smb_buf_length = cpu_to_be32(smb_buffer->smb_buf_length);
- cFYI(1, ("Sending smb of length %d", smb_buf_length));
- dump_smb(smb_buffer, len);
-
- while (len > 0) {
- rc = kernel_sendmsg(ssocket, &smb_msg, &iov, 1, len);
- if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
- i++;
- /* smaller timeout here than send2 since smaller size */
- /* Although it may not be required, this also is smaller
- oplock break time */
- if (i > 12) {
- cERROR(1,
- ("sends on sock %p stuck for 7 seconds",
- ssocket));
- rc = -EAGAIN;
- break;
- }
- msleep(1 << i);
- continue;
- }
- if (rc < 0)
- break;
- else
- i = 0; /* reset i after each successful send */
- iov.iov_base += rc;
- iov.iov_len -= rc;
- len -= rc;
- }
-
- if (rc < 0) {
- cERROR(1, ("Error %d sending data on socket to server", rc));
- } else {
- rc = 0;
- }
-
- /* Don't want to modify the buffer as a
- side effect of this call. */
- smb_buffer->smb_buf_length = smb_buf_length;
-
- return rc;
-}
-
static int
-smb_send2(struct TCP_Server_Info *server, struct kvec *iov, int n_vec,
- struct sockaddr *sin, bool noblocksnd)
+smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec)
{
int rc = 0;
int i = 0;
if (ssocket == NULL)
return -ENOTSOCK; /* BB eventually add reconnect code here */
- smb_msg.msg_name = sin;
+ smb_msg.msg_name = (struct sockaddr *) &server->addr.sockAddr;
smb_msg.msg_namelen = sizeof(struct sockaddr);
smb_msg.msg_control = NULL;
smb_msg.msg_controllen = 0;
- if (noblocksnd)
+ if (server->noblocksnd)
smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL;
else
smb_msg.msg_flags = MSG_NOSIGNAL;
n_vec - first_vec, total_len);
if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
i++;
- if (i >= 14) {
+ /* if blocking send we try 3 times, since each can block
+ for 5 seconds. For nonblocking we have to try more
+ but wait increasing amounts of time allowing time for
+ socket to clear. The overall time we wait in either
+ case to send on the socket is about 15 seconds.
+ Similarly we wait for 15 seconds for
+ a response from the server in SendReceive[2]
+ for the server to send a response back for
+ most types of requests (except SMB Write
+ past end of file which can be slow, and
+ blocking lock operations). NFS waits slightly longer
+ than CIFS, but this can make it take longer for
+ nonresponsive servers to be detected and 15 seconds
+ is more than enough time for modern networks to
+ send a packet. In most cases if we fail to send
+ after the retries we will kill the socket and
+ reconnect which may clear the network problem.
+ */
+ if ((i >= 14) || (!server->noblocksnd && (i > 2))) {
cERROR(1,
("sends on sock %p stuck for 15 seconds",
ssocket));
return rc;
}
+int
+smb_send(struct TCP_Server_Info *server, struct smb_hdr *smb_buffer,
+ unsigned int smb_buf_length)
+{
+ struct kvec iov;
+
+ iov.iov_base = smb_buffer;
+ iov.iov_len = smb_buf_length + 4;
+
+ return smb_sendv(server, &iov, 1);
+}
+
static int wait_for_free_request(struct cifsSesInfo *ses, const int long_op)
{
if (long_op == CIFS_ASYNC_OP) {
/* oplock breaks must not be held up */
atomic_inc(&ses->server->inFlight);
- } else {
- spin_lock(&GlobalMid_Lock);
- while (1) {
- if (atomic_read(&ses->server->inFlight) >=
- cifs_max_pending){
- spin_unlock(&GlobalMid_Lock);
+ return 0;
+ }
+
+ spin_lock(&GlobalMid_Lock);
+ while (1) {
+ if (atomic_read(&ses->server->inFlight) >=
+ cifs_max_pending){
+ spin_unlock(&GlobalMid_Lock);
#ifdef CONFIG_CIFS_STATS2
- atomic_inc(&ses->server->num_waiters);
+ atomic_inc(&ses->server->num_waiters);
#endif
- wait_event(ses->server->request_q,
- atomic_read(&ses->server->inFlight)
- < cifs_max_pending);
+ wait_event(ses->server->request_q,
+ atomic_read(&ses->server->inFlight)
+ < cifs_max_pending);
#ifdef CONFIG_CIFS_STATS2
- atomic_dec(&ses->server->num_waiters);
+ atomic_dec(&ses->server->num_waiters);
#endif
- spin_lock(&GlobalMid_Lock);
- } else {
- if (ses->server->tcpStatus == CifsExiting) {
- spin_unlock(&GlobalMid_Lock);
- return -ENOENT;
- }
-
- /* can not count locking commands against total
- as they are allowed to block on server */
-
- /* update # of requests on the wire to server */
- if (long_op != CIFS_BLOCKING_OP)
- atomic_inc(&ses->server->inFlight);
+ spin_lock(&GlobalMid_Lock);
+ } else {
+ if (ses->server->tcpStatus == CifsExiting) {
spin_unlock(&GlobalMid_Lock);
- break;
+ return -ENOENT;
}
+
+ /* can not count locking commands against total
+ as they are allowed to block on server */
+
+ /* update # of requests on the wire to server */
+ if (long_op != CIFS_BLOCKING_OP)
+ atomic_inc(&ses->server->inFlight);
+ spin_unlock(&GlobalMid_Lock);
+ break;
}
}
return 0;
{
if (ses->server->tcpStatus == CifsExiting) {
return -ENOENT;
- } else if (ses->server->tcpStatus == CifsNeedReconnect) {
+ }
+
+ if (ses->server->tcpStatus == CifsNeedReconnect) {
cFYI(1, ("tcp session dead - return to caller to retry"));
return -EAGAIN;
- } else if (ses->status != CifsGood) {
+ }
+
+ if (ses->status != CifsGood) {
/* check if SMB session is bad because we are setting it up */
if ((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) &&
(in_buf->Command != SMB_COM_NEGOTIATE))
return rc;
}
rc = cifs_sign_smb2(iov, n_vec, ses->server, &midQ->sequence_number);
+ if (rc) {
+ mutex_unlock(&ses->server->srv_mutex);
+ cifs_small_buf_release(in_buf);
+ goto out;
+ }
midQ->midState = MID_REQUEST_SUBMITTED;
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->inSend);
#endif
- rc = smb_send2(ses->server, iov, n_vec,
- (struct sockaddr *) &(ses->server->addr.sockAddr),
- ses->server->noblocksnd);
+ rc = smb_sendv(ses->server, iov, n_vec);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
wait_for_response(ses, midQ, timeout, 10 * HZ);
spin_lock(&GlobalMid_Lock);
- if (midQ->resp_buf) {
- spin_unlock(&GlobalMid_Lock);
- receive_len = midQ->resp_buf->smb_buf_length;
- } else {
+
+ if (midQ->resp_buf == NULL) {
cERROR(1, ("No response to cmd %d mid %d",
midQ->command, midQ->mid));
if (midQ->midState == MID_REQUEST_SUBMITTED) {
return rc;
}
+ spin_unlock(&GlobalMid_Lock);
+ 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));
rc = -EIO;
- } else { /* rcvd frame is ok */
- if (midQ->resp_buf &&
- (midQ->midState == MID_RESPONSE_RECEIVED)) {
-
- iov[0].iov_base = (char *)midQ->resp_buf;
- if (midQ->largeBuf)
- *pRespBufType = CIFS_LARGE_BUFFER;
- else
- *pRespBufType = CIFS_SMALL_BUFFER;
- iov[0].iov_len = receive_len + 4;
-
- dump_smb(midQ->resp_buf, 80);
- /* convert the length into a more usable form */
- if ((receive_len > 24) &&
- (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
- SECMODE_SIGN_ENABLED))) {
- rc = cifs_verify_signature(midQ->resp_buf,
+ goto out;
+ }
+
+ /* rcvd frame is ok */
+
+ if (midQ->resp_buf &&
+ (midQ->midState == MID_RESPONSE_RECEIVED)) {
+
+ iov[0].iov_base = (char *)midQ->resp_buf;
+ if (midQ->largeBuf)
+ *pRespBufType = CIFS_LARGE_BUFFER;
+ else
+ *pRespBufType = CIFS_SMALL_BUFFER;
+ iov[0].iov_len = receive_len + 4;
+
+ dump_smb(midQ->resp_buf, 80);
+ /* convert the length into a more usable form */
+ if ((receive_len > 24) &&
+ (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
+ SECMODE_SIGN_ENABLED))) {
+ rc = cifs_verify_signature(midQ->resp_buf,
&ses->server->mac_signing_key,
midQ->sequence_number+1);
- if (rc) {
- cERROR(1, ("Unexpected SMB signature"));
- /* BB FIXME add code to kill session */
- }
+ if (rc) {
+ cERROR(1, ("Unexpected SMB signature"));
+ /* BB FIXME add code to kill session */
}
-
- /* BB special case reconnect tid and uid here? */
- rc = map_smb_to_linux_error(midQ->resp_buf,
- flags & CIFS_LOG_ERROR);
-
- /* convert ByteCount if necessary */
- if (receive_len >= sizeof(struct smb_hdr) - 4
- /* do not count RFC1001 header */ +
- (2 * midQ->resp_buf->WordCount) + 2 /* bcc */ )
- BCC(midQ->resp_buf) =
- le16_to_cpu(BCC_LE(midQ->resp_buf));
- if ((flags & CIFS_NO_RESP) == 0)
- midQ->resp_buf = NULL; /* mark it so buf will
- not be freed by
- DeleteMidQEntry */
- } else {
- rc = -EIO;
- cFYI(1, ("Bad MID state?"));
}
+
+ /* BB special case reconnect tid and uid here? */
+ rc = map_smb_to_linux_error(midQ->resp_buf,
+ flags & CIFS_LOG_ERROR);
+
+ /* convert ByteCount if necessary */
+ if (receive_len >= sizeof(struct smb_hdr) - 4
+ /* do not count RFC1001 header */ +
+ (2 * midQ->resp_buf->WordCount) + 2 /* bcc */ )
+ BCC(midQ->resp_buf) =
+ le16_to_cpu(BCC_LE(midQ->resp_buf));
+ if ((flags & CIFS_NO_RESP) == 0)
+ midQ->resp_buf = NULL; /* mark it so buf will
+ not be freed by
+ DeleteMidQEntry */
+ } else {
+ rc = -EIO;
+ cFYI(1, ("Bad MID state?"));
}
out:
to the same server. We may make this configurable later or
use ses->maxReq */
+ if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
+ cERROR(1, ("Illegal length, greater than maximum frame, %d",
+ in_buf->smb_buf_length));
+ return -EIO;
+ }
+
rc = wait_for_free_request(ses, long_op);
if (rc)
return rc;
return rc;
}
- if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
- cERROR(1, ("Illegal length, greater than maximum frame, %d",
- in_buf->smb_buf_length));
- DeleteMidQEntry(midQ);
+ rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
+ if (rc) {
mutex_unlock(&ses->server->srv_mutex);
- /* Update # of requests on wire to server */
- atomic_dec(&ses->server->inFlight);
- wake_up(&ses->server->request_q);
- return -EIO;
+ goto out;
}
- rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
-
midQ->midState = MID_REQUEST_SUBMITTED;
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->inSend);
#endif
- rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
- (struct sockaddr *) &(ses->server->addr.sockAddr),
- ses->server->noblocksnd);
+ rc = smb_send(ses->server, in_buf, in_buf->smb_buf_length);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
wait_for_response(ses, midQ, timeout, 10 * HZ);
spin_lock(&GlobalMid_Lock);
- if (midQ->resp_buf) {
- spin_unlock(&GlobalMid_Lock);
- receive_len = midQ->resp_buf->smb_buf_length;
- } else {
+ if (midQ->resp_buf == NULL) {
cERROR(1, ("No response for cmd %d mid %d",
midQ->command, midQ->mid));
if (midQ->midState == MID_REQUEST_SUBMITTED) {
return rc;
}
+ spin_unlock(&GlobalMid_Lock);
+ 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));
rc = -EIO;
- } else { /* rcvd frame is ok */
-
- if (midQ->resp_buf && out_buf
- && (midQ->midState == MID_RESPONSE_RECEIVED)) {
- out_buf->smb_buf_length = receive_len;
- memcpy((char *)out_buf + 4,
- (char *)midQ->resp_buf + 4,
- receive_len);
-
- dump_smb(out_buf, 92);
- /* convert the length into a more usable form */
- if ((receive_len > 24) &&
- (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
- SECMODE_SIGN_ENABLED))) {
- rc = cifs_verify_signature(out_buf,
+ goto out;
+ }
+
+ /* rcvd frame is ok */
+
+ if (midQ->resp_buf && out_buf
+ && (midQ->midState == MID_RESPONSE_RECEIVED)) {
+ out_buf->smb_buf_length = receive_len;
+ memcpy((char *)out_buf + 4,
+ (char *)midQ->resp_buf + 4,
+ receive_len);
+
+ dump_smb(out_buf, 92);
+ /* convert the length into a more usable form */
+ if ((receive_len > 24) &&
+ (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
+ SECMODE_SIGN_ENABLED))) {
+ rc = cifs_verify_signature(out_buf,
&ses->server->mac_signing_key,
midQ->sequence_number+1);
- if (rc) {
- cERROR(1, ("Unexpected SMB signature"));
- /* BB FIXME add code to kill session */
- }
+ if (rc) {
+ cERROR(1, ("Unexpected SMB signature"));
+ /* BB FIXME add code to kill session */
}
+ }
- *pbytes_returned = out_buf->smb_buf_length;
+ *pbytes_returned = out_buf->smb_buf_length;
- /* BB special case reconnect tid and uid here? */
- rc = map_smb_to_linux_error(out_buf, 0 /* no log */ );
+ /* BB special case reconnect tid and uid here? */
+ rc = map_smb_to_linux_error(out_buf, 0 /* no log */ );
- /* convert ByteCount if necessary */
- if (receive_len >= sizeof(struct smb_hdr) - 4
- /* do not count RFC1001 header */ +
- (2 * out_buf->WordCount) + 2 /* bcc */ )
- BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
- } else {
- rc = -EIO;
- cERROR(1, ("Bad MID state?"));
- }
+ /* convert ByteCount if necessary */
+ if (receive_len >= sizeof(struct smb_hdr) - 4
+ /* do not count RFC1001 header */ +
+ (2 * out_buf->WordCount) + 2 /* bcc */ )
+ BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
+ } else {
+ rc = -EIO;
+ cERROR(1, ("Bad MID state?"));
}
out:
mutex_unlock(&ses->server->srv_mutex);
return rc;
}
- rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
- (struct sockaddr *) &(ses->server->addr.sockAddr),
- ses->server->noblocksnd);
+ rc = smb_send(ses->server, in_buf, in_buf->smb_buf_length);
mutex_unlock(&ses->server->srv_mutex);
return rc;
}
to the same server. We may make this configurable later or
use ses->maxReq */
+ if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
+ cERROR(1, ("Illegal length, greater than maximum frame, %d",
+ in_buf->smb_buf_length));
+ return -EIO;
+ }
+
rc = wait_for_free_request(ses, CIFS_BLOCKING_OP);
if (rc)
return rc;
return rc;
}
- if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
- mutex_unlock(&ses->server->srv_mutex);
- cERROR(1, ("Illegal length, greater than maximum frame, %d",
- in_buf->smb_buf_length));
+ rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
+ if (rc) {
DeleteMidQEntry(midQ);
- return -EIO;
+ mutex_unlock(&ses->server->srv_mutex);
+ return rc;
}
- rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
-
midQ->midState = MID_REQUEST_SUBMITTED;
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->inSend);
#endif
- rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
- (struct sockaddr *) &(ses->server->addr.sockAddr),
- ses->server->noblocksnd);
+ rc = smb_send(ses->server, in_buf, in_buf->smb_buf_length);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
cERROR(1, ("Frame too large received. Length: %d Xid: %d",
receive_len, xid));
rc = -EIO;
- } else { /* rcvd frame is ok */
-
- if (midQ->resp_buf && out_buf
- && (midQ->midState == MID_RESPONSE_RECEIVED)) {
- out_buf->smb_buf_length = receive_len;
- memcpy((char *)out_buf + 4,
- (char *)midQ->resp_buf + 4,
- receive_len);
-
- dump_smb(out_buf, 92);
- /* convert the length into a more usable form */
- if ((receive_len > 24) &&
- (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
- SECMODE_SIGN_ENABLED))) {
- rc = cifs_verify_signature(out_buf,
- &ses->server->mac_signing_key,
- midQ->sequence_number+1);
- if (rc) {
- cERROR(1, ("Unexpected SMB signature"));
- /* BB FIXME add code to kill session */
- }
- }
+ goto out;
+ }
- *pbytes_returned = out_buf->smb_buf_length;
+ /* rcvd frame is ok */
- /* BB special case reconnect tid and uid here? */
- rc = map_smb_to_linux_error(out_buf, 0 /* no log */ );
+ if ((out_buf == NULL) || (midQ->midState != MID_RESPONSE_RECEIVED)) {
+ rc = -EIO;
+ cERROR(1, ("Bad MID state?"));
+ goto out;
+ }
- /* convert ByteCount if necessary */
- if (receive_len >= sizeof(struct smb_hdr) - 4
- /* do not count RFC1001 header */ +
- (2 * out_buf->WordCount) + 2 /* bcc */ )
- BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
- } else {
- rc = -EIO;
- cERROR(1, ("Bad MID state?"));
+ out_buf->smb_buf_length = receive_len;
+ memcpy((char *)out_buf + 4,
+ (char *)midQ->resp_buf + 4,
+ receive_len);
+
+ dump_smb(out_buf, 92);
+ /* convert the length into a more usable form */
+ if ((receive_len > 24) &&
+ (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
+ SECMODE_SIGN_ENABLED))) {
+ rc = cifs_verify_signature(out_buf,
+ &ses->server->mac_signing_key,
+ midQ->sequence_number+1);
+ if (rc) {
+ cERROR(1, ("Unexpected SMB signature"));
+ /* BB FIXME add code to kill session */
}
}
+
+ *pbytes_returned = out_buf->smb_buf_length;
+
+ /* BB special case reconnect tid and uid here? */
+ rc = map_smb_to_linux_error(out_buf, 0 /* no log */ );
+
+ /* convert ByteCount if necessary */
+ if (receive_len >= sizeof(struct smb_hdr) - 4
+ /* do not count RFC1001 header */ +
+ (2 * out_buf->WordCount) + 2 /* bcc */ )
+ BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
+
+out:
DeleteMidQEntry(midQ);
if (rstart && rc == -EACCES)
return -ERESTARTSYS;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff