diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-01-10 22:07:54 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-10 22:35:32 +0100 |
| commit | d0dc3701cb46f73cf8ca393f62e325065b0bbd03 (patch) | |
| tree | 14fd83b50509a46c124f526f1eadff967482be33 /fs/nfs | |
| parent | [SCSI] qla1280: fix 32 bit segment code (diff) | |
| download | linux-d0dc3701cb46f73cf8ca393f62e325065b0bbd03.tar.xz linux-d0dc3701cb46f73cf8ca393f62e325065b0bbd03.zip | |
NFSv4: Give the lock stateid its own sequence queue
Sharing the open sequence queue causes a deadlock when we try to take
both a lock sequence id and and open sequence id.
This fixes the regression reported by Dimitri Puzin and Jeff Garzik: See
http://bugzilla.kernel.org/show_bug.cgi?id=9712
for details.
Reported-and-tested-by: Dimitri Puzin <bugs@psycast.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/nfs4_fs.h | 1 | ||||
| -rw-r--r-- | fs/nfs/nfs4state.c | 5 |
2 files changed, 5 insertions, 1 deletions
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index b35069a2aa9e..bd1b9d663fb9 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -115,6 +115,7 @@ struct nfs4_lock_state { #define NFS_LOCK_INITIALIZED 1 int ls_flags; struct nfs_seqid_counter ls_seqid; + struct rpc_sequence ls_sequence; struct nfs_unique_id ls_id; nfs4_stateid ls_stateid; atomic_t ls_count; diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 23a9a36556bf..5a39c6f78acf 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -509,7 +509,10 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f lsp = kzalloc(sizeof(*lsp), GFP_KERNEL); if (lsp == NULL) return NULL; - lsp->ls_seqid.sequence = &state->owner->so_sequence; + rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); + spin_lock_init(&lsp->ls_sequence.lock); + INIT_LIST_HEAD(&lsp->ls_sequence.list); + lsp->ls_seqid.sequence = &lsp->ls_sequence; atomic_set(&lsp->ls_count, 1); lsp->ls_owner = fl_owner; spin_lock(&clp->cl_lock); |