From d0dc3701cb46f73cf8ca393f62e325065b0bbd03 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Thu, 10 Jan 2008 16:07:54 -0500 Subject: 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 Signed-off-by: Trond Myklebust Tested-by: Jeff Garzik Signed-off-by: Linus Torvalds --- fs/nfs/nfs4_fs.h | 1 + fs/nfs/nfs4state.c | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index b35069a2aa9..bd1b9d663fb 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 23a9a36556b..5a39c6f78ac 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); -- cgit v1.2.3-70-g09d2