From 72211dbe727f7c1451aa5adfcbd1197b090eb276 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 15 Dec 2009 14:47:36 -0500 Subject: NFSv4: Release the sequence id before restarting a CLOSE rpc call If the CLOSE or OPEN_DOWNGRADE call triggers a state recovery, and has to be resent, then we must release the seqid. Otherwise the open recovery will wait for the close to finish, which causes a deadlock. This is mainly a NFSv4.1 problem, although it can theoretically happen with NFSv4.0 too, in a OPEN_DOWNGRADE situation. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4state.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'fs/nfs/nfs4state.c') diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 6674b28ddb6..18e8b26878c 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -765,16 +765,21 @@ struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter) return new; } -void nfs_free_seqid(struct nfs_seqid *seqid) +void nfs_release_seqid(struct nfs_seqid *seqid) { if (!list_empty(&seqid->list)) { struct rpc_sequence *sequence = seqid->sequence->sequence; spin_lock(&sequence->lock); - list_del(&seqid->list); + list_del_init(&seqid->list); spin_unlock(&sequence->lock); rpc_wake_up(&sequence->wait); } +} + +void nfs_free_seqid(struct nfs_seqid *seqid) +{ + nfs_release_seqid(seqid); kfree(seqid); } -- cgit v1.2.3