Messages in this thread Patch in this message | | | Date | Sun, 13 Sep 2015 00:56:48 +0200 | From | Willy Tarreau <> | Subject | [PATCH 2.6.32 42/62] fixing infinite OPEN loop in 4.0 stateid recovery |
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2.6.32-longterm review patch. If anyone has any objections, please let me know.
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From: Olga Kornievskaia <kolga@netapp.com>
commit e8d975e73e5fa05f983fbf2723120edcf68e0b38 upstream.
Problem: When an operation like WRITE receives a BAD_STATEID, even though recovery code clears the RECLAIM_NOGRACE recovery flag before recovering the open state, because of clearing delegation state for the associated inode, nfs_inode_find_state_and_recover() gets called and it makes the same state with RECLAIM_NOGRACE flag again. As a results, when we restart looking over the open states, we end up in the infinite loop instead of breaking out in the next test of state flags.
Solution: unset the RECLAIM_NOGRACE set because of calling of nfs_inode_find_state_and_recover() after returning from calling recover_open() function.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> (cherry picked from commit ef8500b18fc4bb03286a93b6032d56ec7bcbfd15)
Signed-off-by: Willy Tarreau <w@1wt.eu> --- fs/nfs/nfs4state.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 2a7f163..71ee6f6 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -929,6 +929,8 @@ restart: __func__); } nfs4_put_open_state(state); + clear_bit(NFS4CLNT_RECLAIM_NOGRACE, + &state->flags); goto restart; } } -- 1.7.12.2.21.g234cd45.dirty
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