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ext4: always set then trimmed blocks count into len

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Currently if the range to trim is too small, for example on 1K fs
the request to trim the first block, then the 'range->len' is not set
reporting wrong number of discarded block to the caller.

Fix this by always setting the 'range->len' before we return. Note that
when there is a failure (-EINVAL) caller can not depend on 'range->len'
being set properly.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Lukas Czerner 2012-03-21 21:26:22 -04:00 committed by Theodore Ts'o
parent 21e7fd22a5
commit a7967f055a
1 changed files with 1 additions and 1 deletions
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2
fs/ext4/mballoc.c
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@ -5035,11 +5035,11 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
*/
first_cluster = 0;
}
range->len = trimmed * sb->s_blocksize;
if (!ret)
atomic_set(&EXT4_SB(sb)->s_last_trim_minblks, minlen);
out:
range->len = trimmed * sb->s_blocksize;
return ret;
}