Commit ca6e909f authored Jan 10, 2011 by Jan Kara Committed by Theodore Ts'o Jan 10, 2011

ext4: fix trimming of a single group



When ext4_trim_fs() is called to trim a part of a single group, the
logic will wrongly set last block of the interval to 'len' instead
of 'first_block + len'. Thus a shorter interval is possibly trimmed.
Fix it.

CC: Lukas Czerner <lczerner@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

parent 6c5a6cb9

fs/ext4/mballoc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -4860,7 +4860,7 @@ int ext4_trim_fs(struct super_block sb, struct fstrim_range range)
		if (len >= EXT4_BLOCKS_PER_GROUP(sb))
		len -= (EXT4_BLOCKS_PER_GROUP(sb) - first_block);
		else
		last_block = len;
		last_block = first_block + len;

		if (e4b.bd_info->bb_free >= minlen) {
		cnt = ext4_trim_all_free(sb, &e4b, first_block,

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