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Date: Wed, 8 Mar 2023 09:18:07 +0800 From: Chao Yu <chao@...nel.org> To: tytso@....edu, adilger.kernel@...ger.ca Cc: linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, Chao Yu <chao@...nel.org> Subject: [PATCH] ext4: fix to report fstrim.minlen back to userspace Quoted from manual of fstrim: "-m, --minimum minimum-size ..., if it's smaller than the device's minimum, and report that (fstrim_range.minlen) back to userspace." So this patch tries to report adjusted fstrim_range.minlen back to userspace via FITRIM interface, if the value is smaller than device's minimum discard granularity. Signed-off-by: Chao Yu <chao@...nel.org> --- fs/ext4/mballoc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 5b2ae37a8b80..bd3ef29cf8a6 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -6491,6 +6491,9 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) discard_granularity >> sb->s_blocksize_bits); if (minlen > EXT4_CLUSTERS_PER_GROUP(sb)) goto out; + + /* Report adjusted minlen back to userspace */ + range->minlen = minlen; } if (end >= max_blks - 1) { end = max_blks - 1; -- 2.25.1
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