| From | Andi Kleen <> | Subject | [PATCH] [42/223] NFSv4: Fix open recovery | Date | Mon, 13 Dec 2010 00:45:39 +0100 (CET) |
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2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ From: Trond Myklebust <Trond.Myklebust@netapp.com>
commit b0ed9dbc24f1fd912b2dd08b995153cafc1d5b1c upstream.
NFSv4 open recovery is currently broken: since we do not clear the state->flags states before attempting recovery, we end up with the 'can_open_cached()' function triggering. This again leads to no OPEN call being put on the wire.
Reported-by: Sachin Prabhu <sprabhu@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- fs/nfs/nfs4proc.c | 3 +++ 1 file changed, 3 insertions(+)
Index: linux/fs/nfs/nfs4proc.c =================================================================== --- linux.orig/fs/nfs/nfs4proc.c +++ linux/fs/nfs/nfs4proc.c @@ -1099,6 +1099,7 @@ static int nfs4_open_recover(struct nfs4 clear_bit(NFS_DELEGATED_STATE, &state->flags); smp_rmb(); if (state->n_rdwr != 0) { + clear_bit(NFS_O_RDWR_STATE, &state->flags); ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); if (ret != 0) return ret; @@ -1106,6 +1107,7 @@ static int nfs4_open_recover(struct nfs4 return -ESTALE; } if (state->n_wronly != 0) { + clear_bit(NFS_O_WRONLY_STATE, &state->flags); ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); if (ret != 0) return ret; @@ -1113,6 +1115,7 @@ static int nfs4_open_recover(struct nfs4 return -ESTALE; } if (state->n_rdonly != 0) { + clear_bit(NFS_O_RDONLY_STATE, &state->flags); ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); if (ret != 0) return ret;
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