X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=fs%2Fcifs%2Ftransport.c;h=0046c219833d6cfbef77e85addc663e1be71e290;hb=f7f1b0f1e2fbadeab12d24236000e778aa9b1ead;hp=3668ab00b3ef2a290287510a8051dd7d77affae6;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 3668ab00b..0046c2198 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -1,7 +1,7 @@
 /*
  *   fs/cifs/transport.c
  *
- *   Copyright (C) International Business Machines  Corp., 2002,2004
+ *   Copyright (C) International Business Machines  Corp., 2002,2005
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -23,6 +23,7 @@
 #include <linux/list.h>
 #include <linux/wait.h>
 #include <linux/net.h>
+#include <linux/delay.h>
 #include <asm/uaccess.h>
 #include <asm/processor.h>
 #include <linux/mempool.h>
@@ -34,13 +35,13 @@
 extern mempool_t *cifs_mid_poolp;
 extern kmem_cache_t *cifs_oplock_cachep;
 
-struct mid_q_entry *
+static struct mid_q_entry *
 AllocMidQEntry(struct smb_hdr *smb_buffer, struct cifsSesInfo *ses)
 {
 	struct mid_q_entry *temp;
 
 	if (ses == NULL) {
-		cERROR(1, ("Null session passed in to AllocMidQEntry "));
+		cERROR(1, ("Null session passed in to AllocMidQEntry"));
 		return NULL;
 	}
 	if (ses->server == NULL) {
@@ -70,7 +71,7 @@ AllocMidQEntry(struct smb_hdr *smb_buffer, struct cifsSesInfo *ses)
 	return temp;
 }
 
-void
+static void
 DeleteMidQEntry(struct mid_q_entry *midEntry)
 {
 	spin_lock(&GlobalMid_Lock);
@@ -78,7 +79,10 @@ DeleteMidQEntry(struct mid_q_entry *midEntry)
 	list_del(&midEntry->qhead);
 	atomic_dec(&midCount);
 	spin_unlock(&GlobalMid_Lock);
-	cifs_buf_release(midEntry->resp_buf);
+	if(midEntry->largeBuf)
+		cifs_buf_release(midEntry->resp_buf);
+	else
+		cifs_small_buf_release(midEntry->resp_buf);
 	mempool_free(midEntry, cifs_mid_poolp);
 }
 
@@ -122,18 +126,16 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
 	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?*/
@@ -145,12 +147,10 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
 
 	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) {
@@ -160,16 +160,15 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
 				rc = -EAGAIN;
 				break;
 			}
-			set_current_state(TASK_INTERRUPTIBLE);
-			schedule_timeout(HZ/2);
+			msleep(500);
 			continue;
 		}
 		if (rc < 0) 
 			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));
@@ -180,6 +179,212 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
 	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
+smb_sendv(struct socket *ssocket, struct smb_hdr *smb_buffer,
+	 unsigned int smb_buf_length, struct kvec * write_vector 
+	  /* page list */, struct sockaddr *sin)
+{
+	int rc = 0;
+	int i = 0;
+	struct msghdr smb_msg;
+	number_of_pages += 1; /* account for SMB header */
+	struct kvec * piov  = kmalloc(number_of_pages * sizeof(struct kvec));
+	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;
+	smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL; /* BB add more flags?*/
+
+	/* 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, number_of_pages, 
+				    len);
+		if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
+			i++;
+			if(i > 60) {
+				cERROR(1,
+				   ("sends on sock %p stuck for 30 seconds",
+				    ssocket));
+				rc = -EAGAIN;
+				break;
+			}
+			msleep(500);
+			continue;
+		}
+		if (rc < 0) 
+			break;
+		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;
+	}
+
+	return rc;
+}
+
+
+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;
+
+  
+
+	if(ses->server->tcpStatus == CIFS_EXITING)
+		return -ENOENT;
+
+	/* 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->server, &midQ->sequence_number);
+
+	midQ->midState = MID_REQUEST_SUBMITTED;
+/*	rc = smb_sendv(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,
@@ -187,7 +392,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 {
 	int rc = 0;
 	unsigned int receive_len;
-	long timeout;
+	unsigned long timeout;
 	struct mid_q_entry *midQ;
 
 	if (ses == NULL) {
@@ -199,24 +404,46 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 		return -EIO;
 	}
 
-	/* 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(ses->server->tcpStatus == CifsExiting)
+		return -ENOENT;
 
-	/* 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);
+	/* 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 */
+	   and avoid races inside tcp sendmsg code that could cause corruption
+	   of smb data */
 
 	down(&ses->server->tcpSem); 
 
@@ -246,7 +473,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 		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 ",
@@ -260,10 +487,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 		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);
+	rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
 
 	midQ->midState = MID_REQUEST_SUBMITTED;
 	rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
@@ -281,7 +505,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 		up(&ses->server->tcpSem);
 	if (long_op == -1)
 		goto cifs_no_response_exit;
-	else if (long_op == 2) /* writes past end of file can take looooong time */
+	else if (long_op == 2) /* writes past end of file can take loong time */
 		timeout = 300 * HZ;
 	else if (long_op == 1)
 		timeout = 45 * HZ; /* should be greater than 
@@ -295,27 +519,28 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 	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) {
@@ -345,41 +570,36 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 		return rc;
 	}
   
-	if (receive_len > CIFS_MAX_MSGSIZE + MAX_CIFS_HDR_SIZE) {
-		cERROR(1,
-		       ("Frame too large received.  Length: %d  Xid: %d",
+	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)) {
-			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) &&
-			   (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((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 (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? */
+			/* BB special case reconnect tid and uid here? */
 			rc = map_smb_to_linux_error(out_buf);
 
 			/* convert ByteCount if necessary */