[PATCH 0/6] mm, netfs, cifs: Miscellaneous fixes

[Steve French]

testing is going fine so far with David's series ontop of current mainline

(I see one possible intermittent server bug failure - on test
generic/728 - but no red flags testing so far)

http://smb311-linux-testing.southcentralus.cloudapp.azure.com/#/builders/3/builds/207

On Wed, Aug 28, 2024 at 4:03 PM David Howells <dhowells at redhat.com> wrote:
>
> Hi Christian, Steve,
>
> Firstly, here are some fixes to DIO read handling and the retrying of
> reads, particularly in relation to cifs:
>
>  (1) Fix the missing credit renegotiation in cifs on the retrying of reads.
>      The credits we had ended with the original read (or the last retry)
>      and to perform a new read we need more credits otherwise the server
>      can reject our read with EINVAL.
>
>  (2) Fix the handling of short DIO reads to avoid ENODATA when the read
>      retry tries to access a portion of the file after the EOF.
>
> Secondly, some patches fixing cifs copy and zero offload:
>
>  (3) Fix cifs_file_copychunk_range() to not try to partially invalidate
>      folios that are only partly covered by the range, but rather flush
>      them back and invalidate them.
>
>  (4) Fix filemap_invalidate_inode() to use the correct invalidation
>      function so that it doesn't leave partially invalidated folios hanging
>      around (which may hide part of the result of an offloaded copy).
>
>  (5) Fix smb3_zero_data() to correctly handle zeroing of data that's
>      buffered locally but not yet written back and with the EOF position on
>      the server short of the local EOF position.
>
>      Note that this will also affect afs and 9p, particularly with regard
>      to direct I/O writes.
>
> And finally, here's an adjustment to debugging statements:
>
>  (6) Adjust three debugging output statements.  Not strictly a fix, so
>      could be dropped.  Including the subreq ID in some extra debug lines
>      helps a bit, though.
>
> The patches can also be found here:
>
>         https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=netfs-fixes
>
> Thanks,
> David
>
> David Howells (6):
>   cifs: Fix lack of credit renegotiation on read retry
>   netfs, cifs: Fix handling of short DIO read
>   cifs: Fix copy offload to flush destination region
>   mm: Fix filemap_invalidate_inode() to use
>     invalidate_inode_pages2_range()
>   cifs: Fix FALLOC_FL_ZERO_RANGE to preflush buffered part of target
>     region
>   netfs, cifs: Improve some debugging bits
>
>  fs/netfs/io.c            | 21 +++++++++++++-------
>  fs/smb/client/cifsfs.c   | 21 ++++----------------
>  fs/smb/client/cifsglob.h |  1 +
>  fs/smb/client/file.c     | 37 ++++++++++++++++++++++++++++++++----
>  fs/smb/client/smb2ops.c  | 26 +++++++++++++++++++------
>  fs/smb/client/smb2pdu.c  | 41 +++++++++++++++++++++++++---------------
>  fs/smb/client/trace.h    |  1 +
>  include/linux/netfs.h    |  1 +
>  mm/filemap.c             |  2 +-
>  9 files changed, 101 insertions(+), 50 deletions(-)
>
>


-- 
Thanks,

Steve