From 1d9a8852c365fb7f8db0f8364210138985f457b8 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Mon, 31 Dec 2007 01:37:11 +0000 Subject: [PATCH] [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 Signed-off-by: Steve French --- fs/cifs/CHANGES | 3 ++- fs/cifs/connect.c | 10 +++++++++- 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES index 13d788f9e5f0..0c778765bd79 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 fd9147cdb5a9..658f58b99e6f 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(); -- 2.39.2