linux-ext4 - [PATCHv1 0/9] ext4: fast_commit fixes, stricter block checking & cleanups

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Date:   Sat,  5 Feb 2022 19:39:49 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     linux-ext4@...r.kernel.org
Cc:     linux-fsdevel@...r.kernel.org, "Theodore Ts'o" <tytso@....edu>,
        Jan Kara <jack@...e.cz>,
        Harshad Shirwadkar <harshadshirwadkar@...il.com>,
        Ritesh Harjani <riteshh@...ux.ibm.com>
Subject: [PATCHv1 0/9] ext4: fast_commit fixes, stricter block checking & cleanups

Hello,

Please find v1 of this patch series aimed at fixing some of the issues
identified in fast_commit. This also adds some stricter checking of
blocks to be freed in ext4_mb_clear_bb(), ext4_group_add_blocks() &
ext4_mb_mark_bb().

I have tested this with few different fast_commit configs and normal 4k config
with -g log,quick. Haven't seen any surprises there.

RFC -> v1:
==========
1. Added Patch-1 which correctly accounts for flex_bg->free_clusters.
2. Addressed review comments from Jan
3. Might have changed the order of patches a bit.

[RFC] - https://lore.kernel.org/all/a9770b46522c03989bdd96f63f7d0bfb2cf499ab.1643642105.git.riteshh@linux.ibm.com/


Ritesh Harjani (9):
  ext4: Correct cluster len and clusters changed accounting in ext4_mb_mark_bb
  ext4: Fixes ext4_mb_mark_bb() with flex_bg with fast_commit
  ext4: Refactor ext4_free_blocks() to pull out ext4_mb_clear_bb()
  ext4: Use in_range() for range checking in ext4_fc_replay_check_excluded
  ext4: Rename ext4_set_bits to mb_set_bits
  ext4: No need to test for block bitmap bits in ext4_mb_mark_bb()
  ext4: Add ext4_sb_block_valid() refactored out of ext4_inode_block_valid()
  ext4: Add strict range checks while freeing blocks
  ext4: Add extra check in ext4_mb_mark_bb() to prevent against possible
    corruption

 fs/ext4/block_validity.c |  25 +--
 fs/ext4/ext4.h           |   5 +-
 fs/ext4/fast_commit.c    |   4 +-
 fs/ext4/mballoc.c        | 342 ++++++++++++++++++++++-----------------
 fs/ext4/resize.c         |   4 +-
 5 files changed, 219 insertions(+), 161 deletions(-)

--
2.31.1