linux.git/fs/nfs/flexfilelayout, branch v5.3

pNFS/flexfiles: Don't time out requests on hard mounts

2019-08-26T19:31:29+00:00

If the mount is hard, we should ignore the 'io_maxretrans' module
parameter so that we always keep retrying.

Signed-off-by: Trond Myklebust

Revert "NFSv4/flexfiles: Abort I/O early if the layout segment was invalidated"

2019-08-26T19:31:29+00:00

This reverts commit a79f194aa4879e9baad118c3f8bb2ca24dbef765.
The mechanism for aborting I/O is racy, since we are not guaranteed that
the request is asleep while we're changing both task->tk_status and
task->tk_action.

Signed-off-by: Trond Myklebust 
Cc: stable@vger.kernel.org # v5.1

pnfs/flexfiles: Add tracepoints for detecting pnfs fallback to MDS

2019-07-18T19:50:28+00:00

Add tracepoints to allow debugging of the event chain leading to
a pnfs fallback to doing I/O through the MDS.

Signed-off-by: Trond Myklebust

pnfs/flexfiles: Fix PTR_ERR() dereferences in ff_layout_track_ds_error

2019-07-18T18:43:52+00:00

mirror->mirror_ds can be NULL if uninitialised, but can contain
a PTR_ERR() if call to GETDEVICEINFO failed.

Fixes: 65990d1afbd2 ("pNFS/flexfiles: Fix a deadlock on LAYOUTGET")
Signed-off-by: Trond Myklebust 
Cc: stable@vger.kernel.org # 4.10+

NFS/flexfiles: Use the correct TCP timeout for flexfiles I/O

2019-06-28T15:48:52+00:00

Fix a typo where we're confusing the default TCP retrans value
(NFS_DEF_TCP_RETRANS) for the default TCP timeout value.

Fixes: 15d03055cf39f ("pNFS/flexfiles: Set reasonable default ...")
Cc: stable@vger.kernel.org # 4.8+
Signed-off-by: Trond Myklebust 
Signed-off-by: Anna Schumaker

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

treewide: Add SPDX license identifier for more missed files

2019-05-21T08:50:45+00:00

Add SPDX license identifiers to all files which:

 - Have no license information of any form

 - Have MODULE_LICENCE("GPL*") inside which was used in the initial
   scan/conversion to ignore the file

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

NFS: Add a helper to return a pointer to the open context of a struct nfs_page

2019-04-25T18:18:15+00:00

Add a helper for when we remove the explicit pointer to the open
context.

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

pNFS: Add tracking to limit the number of pNFS retries

2019-04-25T18:18:14+00:00

When the client is reading or writing using pNFS, and hits an error
on the DS, then it typically sends a LAYOUTERROR and/or LAYOUTRETURN
to the MDS, before redirtying the failed pages, and going for a new
round of reads/writebacks. The problem is that if the server has no
way to fix the DS, then we may need a way to interrupt this loop
after a set number of attempts have been made.
This patch adds an optional module parameter that allows the admin
to specify how many times to retry the read/writeback process before
failing with a fatal error.
The default behaviour is to retry forever.

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

pNFS/flexfiles: Fix layoutstats handling during read failovers

2019-03-23T16:03:58+00:00

During a read failover, we may end up changing the value of
the pgio_mirror_idx, so make sure that we record the layout
stats before that update.

Signed-off-by: Trond Myklebust