int rc = 0;
int i = 0;
struct msghdr smb_msg;
- struct iovec iov;
- mm_segment_t temp_fs;
+ 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 = smb_buf_length + 4;
+ iov.iov_len = len;
smb_msg.msg_name = sin;
smb_msg.msg_namelen = sizeof (struct sockaddr);
- smb_msg.msg_iov = &iov;
- smb_msg.msg_iovlen = 1;
smb_msg.msg_control = NULL;
smb_msg.msg_controllen = 0;
smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL; /* BB add more flags?*/
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, smb_buf_length + 4);
+ dump_smb(smb_buffer, len);
- temp_fs = get_fs(); /* we must turn off socket api parm checking */
- set_fs(get_ds());
- while(iov.iov_len > 0) {
- rc = sock_sendmsg(ssocket, &smb_msg, smb_buf_length + 4);
+ while (len > 0) {
+ rc = kernel_sendmsg(ssocket, &smb_msg, &iov, 1, len);
if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
i++;
if(i > 60) {
break;
iov.iov_base += rc;
iov.iov_len -= rc;
+ len -= rc;
}
- set_fs(temp_fs);
if (rc < 0) {
cERROR(1,("Error %d sending data on socket to server.", rc));
return rc;
}
+#ifdef CIFS_EXPERIMENTAL
+/* BB finish off this function, adding support for writing set of pages as iovec */
+/* and also adding support for operations that need to parse the response smb */
+int
+CIFSSendRcv(const unsigned int xid, struct cifsSesInfo *ses,
+ struct smb_hdr *in_buf, struct kvec * write_vector /* page list */, int *pbytes_returned, const int long_op)
+{
+ int rc = 0;
+ unsigned long timeout = 15 * HZ;
+ struct mid_q_entry *midQ = NULL;
+
+ if (ses == NULL) {
+ cERROR(1,("Null smb session"));
+ return -EIO;
+ }
+ if(ses->server == NULL) {
+ cERROR(1,("Null tcp session"));
+ return -EIO;
+ }
+ if(pbytes_returned == NULL)
+ return -EIO;
+ else
+ *pbytes_returned = 0;
+
+
+
+ /* Ensure that we do not send more than 50 overlapping requests
+ to the same server. We may make this configurable later or
+ use ses->maxReq */
+ if(long_op == -1) {
+ /* 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);
+ wait_event(ses->server->request_q,
+ atomic_read(&ses->server->inFlight)
+ < cifs_max_pending);
+ spin_lock(&GlobalMid_Lock);
+ } else {
+ if(ses->server->tcpStatus == CifsExiting) {
+ spin_unlock(&GlobalMid_Lock);
+ return -ENOENT;
+ }
+
+ /* can not count locking commands against total since
+ they are allowed to block on server */
+
+ if(long_op < 3) {
+ /* update # of requests on the wire to server */
+ atomic_inc(&ses->server->inFlight);
+ }
+ spin_unlock(&GlobalMid_Lock);
+ break;
+ }
+ }
+ }
+ /* make sure that we sign in the same order that we send on this socket
+ and avoid races inside tcp sendmsg code that could cause corruption
+ of smb data */
+
+ down(&ses->server->tcpSem);
+
+ if (ses->server->tcpStatus == CifsExiting) {
+ rc = -ENOENT;
+ goto cifs_out_label;
+ } else if (ses->server->tcpStatus == CifsNeedReconnect) {
+ cFYI(1,("tcp session dead - return to caller to retry"));
+ rc = -EAGAIN;
+ goto cifs_out_label;
+ } else 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)) {
+ rc = -EAGAIN;
+ goto cifs_out_label;
+ } /* else ok - we are setting up session */
+ }
+ midQ = AllocMidQEntry(in_buf, ses);
+ if (midQ == NULL) {
+ up(&ses->server->tcpSem);
+ /* If not lock req, update # of requests on wire to server */
+ if(long_op < 3) {
+ atomic_dec(&ses->server->inFlight);
+ wake_up(&ses->server->request_q);
+ }
+ return -ENOMEM;
+ }
+
+ if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
+ up(&ses->server->tcpSem);
+ cERROR(1,
+ ("Illegal length, greater than maximum frame, %d ",
+ in_buf->smb_buf_length));
+ DeleteMidQEntry(midQ);
+ /* If not lock req, update # of requests on wire to server */
+ if(long_op < 3) {
+ atomic_dec(&ses->server->inFlight);
+ wake_up(&ses->server->request_q);
+ }
+ return -EIO;
+ }
+
+ /* BB can we sign efficiently in this path? */
+ rc = cifs_sign_smb(in_buf, ses, &midQ->sequence_number);
+
+ midQ->midState = MID_REQUEST_SUBMITTED;
+/* rc = smb_send2(ses->server->ssocket, in_buf, in_buf->smb_buf_length, piovec,
+ (struct sockaddr *) &(ses->server->addr.sockAddr));*/
+ if(rc < 0) {
+ DeleteMidQEntry(midQ);
+ up(&ses->server->tcpSem);
+ /* If not lock req, update # of requests on wire to server */
+ if(long_op < 3) {
+ atomic_dec(&ses->server->inFlight);
+ wake_up(&ses->server->request_q);
+ }
+ return rc;
+ } else
+ up(&ses->server->tcpSem);
+cifs_out_label:
+ if(midQ)
+ DeleteMidQEntry(midQ);
+
+ if(long_op < 3) {
+ atomic_dec(&ses->server->inFlight);
+ wake_up(&ses->server->request_q);
+ }
+
+ return rc;
+}
+
+
+#endif /* CIFS_EXPERIMENTAL */
+
int
SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
struct smb_hdr *in_buf, struct smb_hdr *out_buf,
{
int rc = 0;
unsigned int receive_len;
- long timeout;
+ unsigned long timeout;
struct mid_q_entry *midQ;
if (ses == NULL) {
}
/* Ensure that we do not send more than 50 overlapping requests
- to the same server. We may make this configurable later or
- use ses->maxReq */
-
- /* can not count locking commands against the total since
- they are allowed to block on server */
- if(long_op < 3) {
- /* update # of requests on the wire to this server */
- atomic_inc(&ses->server->inFlight);
- }
-
- if(atomic_read(&ses->server->inFlight) > CIFS_MAX_REQ) {
- wait_event(ses->server->request_q,atomic_read(&ses->server->inFlight) <= CIFS_MAX_REQ);
+ to the same server. We may make this configurable later or
+ use ses->maxReq */
+ if(long_op == -1) {
+ /* 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);
+ wait_event(ses->server->request_q,
+ atomic_read(&ses->server->inFlight)
+ < cifs_max_pending);
+ spin_lock(&GlobalMid_Lock);
+ } else {
+ if(ses->server->tcpStatus == CifsExiting) {
+ spin_unlock(&GlobalMid_Lock);
+ return -ENOENT;
+ }
+
+ /* can not count locking commands against total since
+ they are allowed to block on server */
+
+ if(long_op < 3) {
+ /* update # of requests on the wire to server */
+ atomic_inc(&ses->server->inFlight);
+ }
+ spin_unlock(&GlobalMid_Lock);
+ break;
+ }
+ }
}
-
/* make sure that we sign in the same order that we send on this socket
- and avoid races inside tcp sendmsg code that could cause corruption
- of smb data */
+ and avoid races inside tcp sendmsg code that could cause corruption
+ of smb data */
down(&ses->server->tcpSem);
return -ENOMEM;
}
- if (in_buf->smb_buf_length > CIFS_MAX_MSGSIZE + MAX_CIFS_HDR_SIZE - 4) {
+ if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
up(&ses->server->tcpSem);
cERROR(1,
("Illegal length, greater than maximum frame, %d ",
return -EIO;
}
- if (in_buf->smb_buf_length > 12)
- in_buf->Flags2 = cpu_to_le16(in_buf->Flags2);
-
rc = cifs_sign_smb(in_buf, ses, &midQ->sequence_number);
midQ->midState = MID_REQUEST_SUBMITTED;
if (signal_pending(current)) {
/* if signal pending do not hold up user for full smb timeout
but we still give response a change to complete */
- if(midQ->midState & MID_REQUEST_SUBMITTED) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- timeout = sleep_on_timeout(&ses->server->response_q,2 * HZ);
- }
- } else { /* using normal timeout */
- /* timeout = wait_event_interruptible_timeout(ses->server->response_q,
- (midQ->midState & MID_RESPONSE_RECEIVED) ||
+ timeout = 2 * HZ;
+ }
+
+ /* No user interrupts in wait - wreaks havoc with performance */
+ if(timeout != MAX_SCHEDULE_TIMEOUT) {
+ timeout += jiffies;
+ wait_event(ses->server->response_q,
+ (!(midQ->midState & MID_REQUEST_SUBMITTED)) ||
+ time_after(jiffies, timeout) ||
((ses->server->tcpStatus != CifsGood) &&
- (ses->server->tcpStatus != CifsNew)),
- timeout); */
- /* Can not allow user interrupts- wreaks havoc with performance */
- if(midQ->midState & MID_REQUEST_SUBMITTED) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- timeout = sleep_on_timeout(&ses->server->response_q,timeout);
- }
+ (ses->server->tcpStatus != CifsNew)));
+ } else {
+ wait_event(ses->server->response_q,
+ (!(midQ->midState & MID_REQUEST_SUBMITTED)) ||
+ ((ses->server->tcpStatus != CifsGood) &&
+ (ses->server->tcpStatus != CifsNew)));
}
-
+
spin_lock(&GlobalMid_Lock);
if (midQ->resp_buf) {
spin_unlock(&GlobalMid_Lock);
- receive_len = be32_to_cpu(midQ->resp_buf->smb_buf_length);
+ receive_len = be32_to_cpu(*(__be32 *)midQ->resp_buf);
} else {
cERROR(1,("No response buffer"));
if(midQ->midState == MID_REQUEST_SUBMITTED) {
return rc;
}
- if (receive_len > CIFS_MAX_MSGSIZE + MAX_CIFS_HDR_SIZE) {
+ if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
cERROR(1,
("Frame too large received. Length: %d Xid: %d",
receive_len, xid));
if (midQ->resp_buf && out_buf
&& (midQ->midState == MID_RESPONSE_RECEIVED)) {
- memcpy(out_buf, midQ->resp_buf,
- receive_len +
- 4 /* include 4 byte RFC1001 header */ );
+ 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 */
- out_buf->smb_buf_length =
- be32_to_cpu(out_buf->smb_buf_length);
- if((out_buf->smb_buf_length > 24) &&
+ if((receive_len > 24) &&
(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))) {
rc = cifs_verify_signature(out_buf, ses->mac_signing_key,midQ->sequence_number); /* BB fix BB */
if(rc)
cFYI(1,("Unexpected signature received from server"));
}
- if (out_buf->smb_buf_length > 12)
- out_buf->Flags2 = le16_to_cpu(out_buf->Flags2);
- if (out_buf->smb_buf_length > 28)
- out_buf->Pid = le16_to_cpu(out_buf->Pid);
- if (out_buf->smb_buf_length > 28)
- out_buf->PidHigh =
- le16_to_cpu(out_buf->PidHigh);
-
*pbytes_returned = out_buf->smb_buf_length;
/* BB special case reconnect tid and reconnect uid here? */
git://git.onelab.eu / linux-2.6.git / blobdiff