[PATCH v2 0/2] btrfs: some fiemap fixes

From: fdmanana@kernel.org
To: linux-btrfs@vger.kernel.org
Subject: [PATCH v2 0/2] btrfs: some fiemap fixes
Date: Fri, 23 Feb 2024 15:19:47 +0000	[thread overview]
Message-ID: <cover.1708701186.git.fdmanana@suse.com> (raw)
In-Reply-To: <cover.1708635463.git.fdmanana@suse.com>

From: Filipe Manana <fdmanana@suse.com>

There's a recent regression with fiemap due to a fix for a deadlock between
fiemap and memory mapped writes when the fiemap buffer is memory mapped to
the same file range, which leads to a race triggering a warning and making
fiemap fail. Plus one more long standing race when using FIEMAP_FLAG_SYNC.
Details in the change logs.

V2: Updated patch 1/2 to deal with the case of a hole/prealloc extent
    with multiple delalloc ranges inside it.

Filipe Manana (2):
  btrfs: fix race between ordered extent completion and fiemap
  btrfs: ensure fiemap doesn't race with writes when FIEMAP_FLAG_SYNC is given

 fs/btrfs/extent_io.c | 60 +++++++++++++++++++++++++++++++-------------
 fs/btrfs/inode.c     | 22 +++++++++++++++-
 2 files changed, 64 insertions(+), 18 deletions(-)

-- 
2.40.1