linux.git/fs/nfs/flexfilelayout/flexfilelayoutdev.c, branch v4.10

pNFS/flexfiles: delete deviceid, don't mark inactive

2016-12-19T22:29:45+00:00

Instead of marking a device inactive, remove it from the cache entirely.

Flexfiles has a way to report errors back to the server, so we don't want
to stop devices from being tried again for 120 seconds.

Signed-off-by: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

pNFS/flexfiles: Fix a deadlock on LAYOUTGET

2016-12-09T02:49:57+00:00

  We encountered a deadlock where the SEQUENCE that accompanied the
LAYOUTGET triggered a session drain, while ff_layout_alloc_lseg
triggered a GETDEVICEINFO.  The GETDEVICEINFO hung waiting for the
session drain, while the LAYOUTGET held the slot waiting for
alloc_lseg to finish.
  Avoid this by moving the call to nfs4_find_get_deviceid out of
ff_layout_alloc_lseg and into nfs4_ff_layout_prepare_ds.

Signed-off-by: Fred Isaman 
[dros@primarydata.com: pNFS/flexfiles: fix races in ff_layout_mirror_valid]
Signed-off-by: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

pNFS/flexfiles: Fix ff_layout_add_ds_error_locked()

2016-12-07T18:41:58+00:00

When we're merging an old entry into our new entry, we want to ensure that
we add the list entry in the correct place.

Signed-off-by: Trond Myklebust

pNFS/flexfiles: Refactor encoding of the layoutreturn payload

2016-12-03T20:37:43+00:00

Add the layout error payload to the flexfiles layoutreturn private
data, and set up the encoding mechanisms. This is a refactoring in
preparation for adding the layout iostats payload.

Signed-off-by: Trond Myklebust

NFS: Remove unused authflavour parameter from nfs_get_client()

2016-12-01T22:46:32+00:00

This parameter hasn't been used since f8407299 (Linux 3.11-rc2), so
let's remove it from this function and callers.

Signed-off-by: Anna Schumaker 
Signed-off-by: Trond Myklebust

pNFS: consolidate the different range intersection tests

2016-12-01T22:21:41+00:00

Both pnfs.c and the flexfiles code have their own versions of the
range intersection testing, and the "end_offset" helper.

Signed-off-by: Trond Myklebust

pNFS/flexfiles: Fix an Oopsable condition when connection to the DS fails

2016-08-29T19:21:16+00:00

If the attempt to connect to a DS fails inside ff_layout_pg_init_read or
ff_layout_pg_init_write, then we currently end up clearing the layout
segment carried by the struct nfs_pageio_descriptor, causing an Oops
when we later call into ff_layout_read_pagelist/ff_layout_write_pagelist.

The fix is to ensure we return the layout and then retry.

Fixes: 446ca2195303 ("pNFS/flexfiles: When initing reads or writes, we...")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Trond Myklebust

pNFS/flexfiles: Set reasonable default retrans values for the data channel

2016-08-16T15:16:19+00:00

Prior to this patch, the retrans value was set at 5, meaning that we
could see a maximum retransmission timeout value of more than 6 minutes.
That's a tad high for NFSv3 where the protocol does allow the server to
drop requests at any time.

Since this is a data channel, let's just set retrans to 0, and the default
timeout to 60s. The user can continue to adjust these defaults using the
dataserver_retrans and dataserver_timeo module parameters.

Signed-off-by: Trond Myklebust

nfs/flexfiles: Helper function to detect FF_FLAGS_NO_READ_IO

2016-05-25T17:35:20+00:00

The mds can inform the client not to use the IOMODE_RW layout
segment for doing READs. I.e., it is basically a
IOMODE_WRITE layout segment.

It would do this to not interfere with the WRITEs.

Signed-off-by: Tom Haynes 
Signed-off-by: Anna Schumaker

flexfiles: add kerneldoc header to nfs4_ff_layout_prepare_ds

2016-05-17T19:48:11+00:00

Signed-off-by: Jeff Layton 
Signed-off-by: Anna Schumaker