linux-ext4 - [RFCv2 0/8] ext2: DIO to use iomap

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Date:   Tue, 11 Apr 2023 10:51:48 +0530
From:   "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
To:     linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org
Cc:     Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@...radead.org>,
        "Darrick J . Wong" <djwong@...nel.org>,
        Ojaswin Mujoo <ojaswin@...ux.ibm.com>,
        "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
Subject: [RFCv2 0/8] ext2: DIO to use iomap

Please find the series which moves ext2 direct-io to use modern iomap interface.

Here are some more details -
1. Patch-1: Fixes a kernel bug_on problem with ext2 dax code (found during code
   review and testing).
2. Patch-2: Adds a __generic_file_fsync_nolock implementation as we had
   discussed.
3. Patch-3 & Patch-4: Moves ext4 nojournal and ext2 to use _nolock method.
4. Patch-5: This is the main patch which moves ext2 direct-io to use iomap.
   (more details can be found in the patch)
5. Patch-6: Kills IOMAP_DIO_NOSYNC flag as it is not in use by any filesystem.
6. Patch-7: adds IOCB_STRINGS macro for use in trace events for better trace
   output of iocb flags.
7. Patch-8: Add ext2 trace point for DIO.

Testing:
=========
This passes ext2 "auto" group testing for fstests. There were no new failures
with this patches.

Ritesh Harjani (IBM) (8):
  ext2/dax: Fix ext2_setsize when len is page aligned
  libfs: Add __generic_file_fsync_nolock implementation
  ext4: Use __generic_file_fsync_nolock implementation
  ext2: Use __generic_file_fsync_nolock implementation
  ext2: Move direct-io to use iomap
  iomap: Remove IOMAP_DIO_NOSYNC unused dio flag
  fs.h: Add IOCB_STRINGS for use in trace points
  ext2: Add direct-io trace points

 fs/ext2/Makefile      |   2 +-
 fs/ext2/ext2.h        |   1 +
 fs/ext2/file.c        | 127 +++++++++++++++++++++++++++++++++++++++++-
 fs/ext2/inode.c       |  57 +++++++++++--------
 fs/ext2/trace.c       |   5 ++
 fs/ext2/trace.h       |  61 ++++++++++++++++++++
 fs/ext4/fsync.c       |  31 +++++------
 fs/iomap/direct-io.c  |   2 +-
 fs/libfs.c            |  43 ++++++++++++++
 include/linux/fs.h    |  15 +++++
 include/linux/iomap.h |   6 --
 11 files changed, 303 insertions(+), 47 deletions(-)
 create mode 100644 fs/ext2/trace.c
 create mode 100644 fs/ext2/trace.h

--
2.39.2