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authorJeff Layton <jlayton@redhat.com>2007-12-31 01:37:11 +0000
committerSteve French <sfrench@us.ibm.com>2007-12-31 01:37:11 +0000
commit1d9a8852c365fb7f8db0f8364210138985f457b8 (patch)
tree277aa7baf9e458edc757fdbc267e0b331340be22 /fs/cifs
parent05b3de63da2abe804f5dbe0174298bf48949079f (diff)
[CIFS] redo existing session setup if needed in cifs_mount
When cifs_mount finds an existing SMB session that it can use for a new mount, it does not check to see whether that session is in need of being reconnected. An easy way to reproduce: 1) mount //server/share1 2) watch /proc/fs/cifs/DebugData for the share to go DISCONNECTED 3) mount //server/share2 with same creds as in step 1. The second mount will fail because CIFSTCon returned -EAGAIN. If you do an operation in share1 and then reattempt the mount it will work (since the session is reestablished). The following patch fixes this by having cifs_mount check the status of the session when it picks an existing session and calling cifs_setup_session on it again if it's in need of reconnection. Thanks to Wojciech Pilorz for the initial bug report. Signed-off-by: Jeff Layton <jlayton@tupile.poochiereds.net> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/CHANGES3
-rw-r--r--fs/cifs/connect.c10
2 files changed, 11 insertions, 2 deletions
diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 13d788f9e5f..0c778765bd7 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -3,7 +3,8 @@ Version 1.52
Fix oops on second mount to server when null auth is used.
Enable experimental Kerberos support. Return writebehind errors on flush
and sync so that events like out of disk space get reported properly on
-cached files. Fix setxattr failure to certain Samba versions.
+cached files. Fix setxattr failure to certain Samba versions. Fix mount
+of second share to disconnected server session (autoreconnect on this).
Version 1.51
------------
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index fd9147cdb5a..658f58b99e6 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1964,7 +1964,15 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
if (existingCifsSes) {
pSesInfo = existingCifsSes;
- cFYI(1, ("Existing smb sess found"));
+ cFYI(1, ("Existing smb sess found (status=%d)",
+ pSesInfo->status));
+ if (pSesInfo->status == CifsNeedReconnect) {
+ cFYI(1, ("Session needs reconnect"));
+ down(&pSesInfo->sesSem);
+ rc = cifs_setup_session(xid, pSesInfo,
+ cifs_sb->local_nls);
+ up(&pSesInfo->sesSem);
+ }
} else if (!rc) {
cFYI(1, ("Existing smb sess not found"));
pSesInfo = sesInfoAlloc();