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authorJie Liu <jeff.liu@oracle.com>2014-01-21 15:48:34 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-21 16:19:42 -0800
commit19e8ac2721148a475833d7b5f893f9b81fbb0045 (patch)
tree6b07661bfe12c9952eb032d8149634acb3220ccd /fs/ocfs2
parent0a2fcd8988ac682f443fd5b0a7c48154a7b42ef2 (diff)
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ocfs2: return EOPNOTSUPP if the device does not support discard
For FITRIM ioctl(2), we should return EOPNOTSUPP to inform the user that the storage device does not support discard if it is, otherwise return success would confuse the user even though there is no free blocks were trimmed at all. 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>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/ioctl.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index fa32ce9b455d..4de6a2af592f 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -7,6 +7,7 @@
#include <linux/fs.h>
#include <linux/mount.h>
+#include <linux/blkdev.h>
#include <linux/compat.h>
#include <cluster/masklog.h>
@@ -966,12 +967,16 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
case FITRIM:
{
struct super_block *sb = inode->i_sb;
+ struct request_queue *q = bdev_get_queue(sb->s_bdev);
struct fstrim_range range;
int ret = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
+ if (!blk_queue_discard(q))
+ return -EOPNOTSUPP;
+
if (copy_from_user(&range, argp, sizeof(range)))
return -EFAULT;