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[PATCH] cifs: Better handle errors on second socket recv message call

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Signed-off-by: Steve French (sfrench@us.ibm.com)
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Steve French 2005-04-28 22:41:09 -07:00 committed by Linus Torvalds
parent 09d1db5c61
commit 67010fbc6f
2 changed files with 27 additions and 7 deletions
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3
fs/cifs/cifsglob.h
View file

@ -1,7 +1,7 @@
/*
* fs/cifs/cifsglob.h
*
* Copyright (C) International Business Machines Corp., 2002,2003
* 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
@ -321,6 +321,7 @@ struct mid_q_entry {
__u8 command; /* smb command code */
unsigned multiPart:1; /* multiple responses to one SMB request */
unsigned largeBuf:1; /* if valid response, is pointer to large buf */
unsigned multiResp:1 /* multiple trans2 responses for one request */
};
struct oplock_q_entry {

31
fs/cifs/connect.c
View file

@ -359,20 +359,36 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
length = 0;
iov.iov_base = 4 + (char *)smb_buffer;
iov.iov_len = pdu_length;
for (total_read = 0;
for (total_read = 0;
total_read < pdu_length;
total_read += length) {
length = kernel_recvmsg(csocket, &smb_msg,
length = kernel_recvmsg(csocket, &smb_msg,
&iov, 1,
pdu_length - total_read, 0);
if (length == 0) {
if((server->tcpStatus == CifsExiting) ||
(length == -EINTR)) {
/* then will exit */
goto dmx_loop_end;
} else if (server->tcpStatus ==
CifsNeedReconnect) {
cifs_reconnect(server);
csocket = server->ssocket;
/* Reconnect wakes up rspns q */
/* Now we will reread sock */
goto dmx_loop_end;
} else if ((length == -ERESTARTSYS) ||
(length == -EAGAIN)) {
msleep(1); /* minimum sleep to prevent looping
allowing socket to clear and app threads to set
tcpStatus CifsNeedReconnect if server hung */
continue;
} else if (length <= 0) {
cERROR(1,
("Zero length receive when expecting %d ",
("Received no data, expecting %d",
pdu_length - total_read));
cifs_reconnect(server);
csocket = server->ssocket;
wake_up(&server->response_q);
continue;
goto dmx_loop_end;
}
}
length += 4; /* account for rfc1002 hdr */
@ -434,6 +450,9 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
wake_up(&server->response_q);
continue;
}
dmx_loop_end:
cFYI(1,("Exiting cifsd loop"));
}
spin_lock(&GlobalMid_Lock);
server->tcpStatus = CifsExiting;