retry socket write on EAGAIN. Fix oops in write when tcp session dead.

fs/cifs/CHANGES

+Version 0.89
+------------
+Fix oops on write to dead tcp session.
+
+Version 0.88
+------------
+Fix non-POSIX behavior on rename of open file and delete of open file by taking 
+advantage of trans2 SetFileInfo rename facility if available on target server.
+Retry on ENOSPC and EAGAIN socket errors.
+
 Version 0.87
 ------------
 Fix oops on big endian readdir.  Set blksize to be even power of two (2**blkbits) to fix

fs/cifs/cifssmb.c

@@ -526,6 +526,10 @@ CIFSSMBRead(const int xid, struct cifsTconInfo *tcon,
 	if (rc)
 		return rc;
 
+        /* tcon and ses pointer are checked in smb_init */
+        if (tcon->ses->server == NULL)
+                return -ECONNABORTED;
+
 	pSMB->AndXCommand = 0xFF;	/* none */
 	pSMB->Fid = netfid;
 	pSMB->OffsetLow = cpu_to_le32(lseek & 0xFFFFFFFF);
@@ -584,6 +588,9 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
 		      (void **) &pSMBr);
 	if (rc)
 		return rc;
+	/* tcon and ses pointer are checked in smb_init */
+	if (tcon->ses->server == NULL)
+		return -ECONNABORTED;
 
 	pSMB->AndXCommand = 0xFF;	/* none */
 	pSMB->Fid = netfid;

fs/cifs/connect.c

@@ -233,9 +233,9 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 				    (checkSMBhdr
 				     (smb_buffer, smb_buffer->Mid))) {
 					cERROR(1,
-					       (KERN_ERR
-						"Invalid size or format for SMB found with length %d and pdu_lenght %d",
+					    ("Invalid size or format for SMB found with length %d and pdu_lenght %d",
 						length, pdu_length));
+					cifs_dump_mem("Received Data is: ",temp,sizeof(struct smb_hdr));
 					/* BB fix by finding next smb signature - and reading off data until next smb ? BB */
 
 					/* BB add reconnect here */

fs/cifs/dir.c

@@ -51,7 +51,6 @@ build_path_from_dentry(struct dentry *direntry)
 
 	for (temp = direntry; !IS_ROOT(temp);) {
 		namelen += (1 + temp->d_name.len);
-		cFYI(1, (" len %d ", namelen));
 		temp = temp->d_parent;
 	}
 	namelen += 1;		/* allow for trailing null */

fs/cifs/transport.c

@@ -169,7 +169,7 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
 	temp_fs = get_fs();	/* we must turn off socket api parm checking */
 	set_fs(get_ds());
 	rc = sock_sendmsg(ssocket, &smb_msg, smb_buf_length + 4);
-	while(rc == -ENOSPC) {
+	while((rc == -ENOSPC) || (rc == -EAGAIN)) {
 		schedule_timeout(HZ/2);
 		rc = sock_sendmsg(ssocket, &smb_msg, smb_buf_length + 4);
 	}