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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-10-19 22:46:45 +0300 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-11-17 21:47:58 +0300 |
| commit | 3be0f80b5fe9c16eca2d538f799b94ca8aa59433 (patch) | |
| tree | b6fc406f57844f26d03d1a0fc9229468f171146e /fs/nfs/nfs4_fs.h | |
| parent | 6f0afc28257dfa769c210f8f8da0f21d77e7452f (diff) | |
| download | linux-3be0f80b5fe9c16eca2d538f799b94ca8aa59433.tar.xz | |
NFSv4.1: Fix up replays of interrupted requests
If the previous request on a slot was interrupted before it was
processed by the server, then our slot sequence number may be out of whack,
and so we try the next operation using the old sequence number.
The problem with this, is that not all servers check to see that the
client is replaying the same operations as previously when they decide
to go to the replay cache, and so instead of the expected error of
NFS4ERR_SEQ_FALSE_RETRY, we get a replay of the old reply, which could
(if the operations match up) be mistaken by the client for a new reply.
To fix this, we attempt to send a COMPOUND containing only the SEQUENCE op
in order to resync our slot sequence number.
Cc: Olga Kornievskaia <olga.kornievskaia@gmail.com>
[olga.kornievskaia@gmail.com: fix an Oops]
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/nfs4_fs.h')
| -rw-r--r-- | fs/nfs/nfs4_fs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index ac4f10b7f6c1..b547d935aaf0 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -464,7 +464,7 @@ extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid); extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid); extern void nfs_release_seqid(struct nfs_seqid *seqid); extern void nfs_free_seqid(struct nfs_seqid *seqid); -extern int nfs4_setup_sequence(const struct nfs_client *client, +extern int nfs4_setup_sequence(struct nfs_client *client, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, struct rpc_task *task); |