linux.git/fs/nfs/callback_proc.c, branch v4.6

NFSv4.x: Fix NFS4ERR_RETRY_UNCACHED_REP in nfs4_callback_sequence

2016-02-01T17:06:24+00:00

We need to initialize cb_sequenceres information when reporting a
NFS4ERR_RETRY_UNCACHED_REP error, since that will apply to the
next operation, not to the CB_SEQUENCE itself.

Reported-by: Kinglong Mee 
Signed-off-by: Trond Myklebust

NFSv4.x: Allow multiple callbacks in flight

2016-01-25T14:36:21+00:00

Hook the callback channel into the same session management machinery
as we use for the forward channel.

Signed-off-by: Trond Myklebust

NFSv4.x: Fix wraparound issues when validing the callback sequence id

2016-01-24T22:12:49+00:00

We need to make sure that we don't allow args->csa_sequenceid == 0.

Signed-off-by: Trond Myklebust

NFSv4.x: Enforce the ca_maxresponsesize_cached on the back channel

2016-01-24T22:12:48+00:00

We have no duplicate reply cache, so we always set the back channel
ca_maxresponsesize_cached to zero when negotiating the session.
That means we should always error out as soon as we see the server
set args->csa_cachethis.

Signed-off-by: Trond Myklebust

NFSv4.x: CB_SEQUENCE should return NFS4ERR_DELAY if still executing

2016-01-24T22:12:48+00:00

See RFC5661 Section 2.10.6.2: if retrying a request, and the old one is
still in progress, we must return NFS4ERR_DELAY as the reply to sequence.

Signed-off-by: Trond Myklebust

NFSv4.x: Remove hard coded slotids in callback channel

2016-01-24T22:12:47+00:00

Instead, use the values encoded in the slot table itself.

Signed-off-by: Trond Myklebust

NFSv4.1/pNFS: Fix a race in initiate_file_draining()

2016-01-04T17:36:12+00:00

Peng Tao points out that the call to pnfs_mark_matching_lsegs_return()
could race with pnfs_put_lseg(), in which case the layout segment is
cleared, but no layoutreturn will be sent.
Fix is to replace the call to pnfs_mark_matching_lsegs_invalid().

Reported-by: Peng Tao 
Signed-off-by: Trond Myklebust

NFSv4.1/pNFS: Don't queue up a new commit if the layout segment is invalid

2015-12-31T20:55:35+00:00

If the layout segment is invalid, then we should not be adding more
write requests to the commit list. Instead, those writes should be
replayed after requesting a new layout.

Signed-off-by: Trond Myklebust

NFSv4: List stateid information in the callback tracepoints

2015-12-28T19:33:05+00:00

The stateid is extremely valuable when debugging.

Signed-off-by: Trond Myklebust

NFSv4.1/pNFS: Don't return NFS4ERR_DELAY unnecessarily in CB_LAYOUTRECALL

2015-12-28T19:33:05+00:00

If the client is promising to return the layout ASAP, then there is no
need to return DELAY and have the server retry. Instead default to the
normal procedure described in RFC5661.

Signed-off-by: Trond Myklebust