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Message-ID: <71c65793ebc15d59e8ff4112f47df85f3ed766e3.1746734746.git.ritesh.list@gmail.com> Date: Fri, 9 May 2025 02:20:36 +0530 From: "Ritesh Harjani (IBM)" <ritesh.list@...il.com> To: linux-ext4@...r.kernel.org Cc: Theodore Ts'o <tytso@....edu>, Jan Kara <jack@...e.cz>, John Garry <john.g.garry@...cle.com>, djwong@...nel.org, Ojaswin Mujoo <ojaswin@...ux.ibm.com>, linux-fsdevel@...r.kernel.org, "Ritesh Harjani (IBM)" <ritesh.list@...il.com> Subject: [PATCH v3 6/7] ext4: Enable support for ext4 multi-fsblock atomic write using bigalloc Last couple of patches added the needed support for multi-fsblock atomic writes using bigalloc. This patch ensures that filesystem advertizes the needed atomic write unit min and max values for enabling multi-fsblock atomic write support with bigalloc. Co-developed-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com> Signed-off-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@...il.com> --- fs/ext4/super.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 181934499624..508ea5cff1c7 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -4442,12 +4442,12 @@ static int ext4_handle_clustersize(struct super_block *sb) /* * ext4_atomic_write_init: Initializes filesystem min & max atomic write units. * @sb: super block - * TODO: Later add support for bigalloc */ static void ext4_atomic_write_init(struct super_block *sb) { struct ext4_sb_info *sbi = EXT4_SB(sb); struct block_device *bdev = sb->s_bdev; + unsigned int clustersize = sb->s_blocksize; if (!bdev_can_atomic_write(bdev)) return; @@ -4455,9 +4455,12 @@ static void ext4_atomic_write_init(struct super_block *sb) if (!ext4_has_feature_extents(sb)) return; + if (ext4_has_feature_bigalloc(sb)) + clustersize = EXT4_CLUSTER_SIZE(sb); + sbi->s_awu_min = max(sb->s_blocksize, bdev_atomic_write_unit_min_bytes(bdev)); - sbi->s_awu_max = min(sb->s_blocksize, + sbi->s_awu_max = min(clustersize, bdev_atomic_write_unit_max_bytes(bdev)); if (sbi->s_awu_min && sbi->s_awu_max && sbi->s_awu_min <= sbi->s_awu_max) { -- 2.49.0
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