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ocfs2: return EINVAL if the given range to discard is less than block size

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For FITRIM ioctl(2), we should not keep silence if the given range
length ls less than a block size as there is no data blocks would be
discareded.  Hence it should return EINVAL instead.  This issue can be
verified via xfstests/generic/288 which is used for FITRIM argument
handling tests.

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jie Liu 2014-01-21 15:48:35 -08:00 committed by Linus Torvalds
parent 19e8ac2721
commit aa89762c54
1 changed files with 3 additions and 7 deletions
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10
fs/ocfs2/alloc.c
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@ -7260,14 +7260,8 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
start = range->start >> osb->s_clustersize_bits;
len = range->len >> osb->s_clustersize_bits;
minlen = range->minlen >> osb->s_clustersize_bits;
trimmed = 0;
if (!len) {
range->len = 0;
return 0;
}
if (minlen >= osb->bitmap_cpg)
if (minlen >= osb->bitmap_cpg || range->len < sb->s_blocksize)
return -EINVAL;
main_bm_inode = ocfs2_get_system_file_inode(osb,
@ -7293,6 +7287,7 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
goto out_unlock;
}
len = range->len >> osb->s_clustersize_bits;
if (start + len > le32_to_cpu(main_bm->i_clusters))
len = le32_to_cpu(main_bm->i_clusters) - start;
@ -7307,6 +7302,7 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
last_group = ocfs2_which_cluster_group(main_bm_inode, start + len - 1);
last_bit = osb->bitmap_cpg;
trimmed = 0;
for (group = first_group; group <= last_group;) {
if (first_bit + len >= osb->bitmap_cpg)
last_bit = osb->bitmap_cpg;