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| author | Jeff Layton <jlayton@redhat.com> | 2008-11-14 13:53:46 -0500 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2008-11-14 23:56:55 +0000 |
| commit | 14fbf50d695207754daeb96270b3027a3821121f (patch) | |
| tree | 05e80aa7e5e6a6bc07a9354f744ba9c599699569 /fs/cifs/cifsglob.h | |
| parent | e7ddee9037e7dd43de1ad08b51727e552aedd836 (diff) | |
| download | linux-14fbf50d695207754daeb96270b3027a3821121f.tar.gz linux-14fbf50d695207754daeb96270b3027a3821121f.tar.bz2 linux-14fbf50d695207754daeb96270b3027a3821121f.zip | |
cifs: reinstate sharing of SMB sessions sans races
We do this by abandoning the global list of SMB sessions and instead
moving to a per-server list. This entails adding a new list head to the
TCP_Server_Info struct. The refcounting for the cifsSesInfo is moved to
a non-atomic variable. We have to protect it by a lock anyway, so there's
no benefit to making it an atomic. The list and refcount are protected
by the global cifs_tcp_ses_lock.
The patch also adds a new routines to find and put SMB sessions and
that properly take and put references under the lock.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/cifsglob.h')
| -rw-r--r-- | fs/cifs/cifsglob.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 313f7bfedec7..631a99f72f22 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -195,14 +195,14 @@ struct cifsUidInfo { * Session structure. One of these for each uid session with a particular host */ struct cifsSesInfo { - struct list_head cifsSessionList; + struct list_head smb_ses_list; struct list_head tcon_list; struct semaphore sesSem; #if 0 struct cifsUidInfo *uidInfo; /* pointer to user info */ #endif struct TCP_Server_Info *server; /* pointer to server info */ - atomic_t inUse; /* # of mounts (tree connections) on this ses */ + int ses_count; /* reference counter */ enum statusEnum status; unsigned overrideSecFlg; /* if non-zero override global sec flags */ __u16 ipc_tid; /* special tid for connection to IPC share */ @@ -602,8 +602,6 @@ GLOBAL_EXTERN struct list_head cifs_tcp_ses_list; /* protects cifs_tcp_ses_list and srv_count for each tcp session */ GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock; - -GLOBAL_EXTERN struct list_head GlobalSMBSessionList; /* BB to be removed by jl*/ GLOBAL_EXTERN struct list_head GlobalTreeConnectionList; /* BB to be removed */ GLOBAL_EXTERN rwlock_t GlobalSMBSeslock; /* protects list inserts on 3 above */ |