Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1224549

Re: [PATCH 2.6.32 42/62] fixing infinite OPEN loop in 4.0 stateid recovery

Show all headers | View raw

Hi Willy,

I believe the patch introduced another problem and needs to be corrected. 

> On Sep 12, 2015, at 6:56 PM, Willy Tarreau <w@1wt.eu> wrote:
> 
> 2.6.32-longterm review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> 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
> 
> 
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 2.6.32 42/62] fixing infinite OPEN loop in 4.0 stateid recovery Willy Tarreau <w@1wt.eu> - 2015-09-13 01:30 +0200
  Re: [PATCH 2.6.32 42/62] fixing infinite OPEN loop in 4.0 stateid  recovery "Kornievskaia, Olga" <Olga.Kornievskaia@netapp.com> - 2015-09-15 02:00 +0200
    Re: [PATCH 2.6.32 42/62] fixing infinite OPEN loop in 4.0 stateid recovery Willy Tarreau <w@1wt.eu> - 2015-09-15 07:40 +0200
      Re: [PATCH 2.6.32 42/62] fixing infinite OPEN loop in 4.0 stateid recovery Willy Tarreau <w@1wt.eu> - 2015-09-16 07:40 +0200

csiph-web