linux.git/fs/nfs/write.c, branch v5.3

NFS: remove set but not used variable 'mapping'

2019-08-27T14:24:56+00:00

Fixes gcc '-Wunused-but-set-variable' warning:

fs/nfs/write.c: In function nfs_page_async_flush:
fs/nfs/write.c:609:24: warning: variable mapping set but not used [-Wunused-but-set-variable]

It is not use since commit aefb623c422e ("NFS: Fix
writepage(s) error handling to not report errors twice")

Reported-by: Hulk Robot 
Signed-off-by: YueHaibing 
Signed-off-by: Trond Myklebust

NFS: Fix writepage(s) error handling to not report errors twice

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

If writepage()/writepages() saw an error, but handled it without
reporting it, we should not be re-reporting that error on exit.

Signed-off-by: Trond Myklebust

NFS: Fix spurious EIO read errors

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

If the client attempts to read a page, but the read fails due to some
spurious error (e.g. an ACCESS error or a timeout, ...) then we need
to allow other processes to retry.
Also try to report errors correctly when doing a synchronous readpage.

Signed-off-by: Trond Myklebust

NFS: On fatal writeback errors, we need to call nfs_inode_remove_request()

2019-08-19T12:56:04+00:00

If the writeback error is fatal, we need to remove the tracking structures
(i.e. the nfs_page) from the inode.

Fixes: 6fbda89b257f ("NFS: Replace custom error reporting mechanism...")
Signed-off-by: Trond Myklebust

NFS: Clean up writeback code

2019-07-06T18:54:52+00:00

Now that the VM promises never to recurse back into the filesystem
layer on writeback, remove all the GFP_NOFS references etc from
the generic writeback code.

Signed-off-by: Trond Myklebust

treewide: Add SPDX license identifier for 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 EXPORT_.*_SYMBOL_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

NFS: Remove unused argument from nfs_create_request()

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

All the callers of nfs_create_request() are now creating page group
heads, so we can remove the redundant 'last' page argument.

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

NFS: Replace custom error reporting mechanism with generic one

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

Replace the NFS custom error reporting mechanism with the generic
mapping_set_error().

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