btrfs: replace error code from btrfs_drop_extents

There's a case which clone does not handle and used to BUG_ON instead,
(testcase xfstests/btrfs/035), now returns EINVAL. This error code is
confusing to the ioctl caller, as it normally signifies errorneous
arguments.

Change it to ENOPNOTSUPP which allows a fall back to copy instead of
clone. This does not affect the common reflink operation.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index e7e78fa..1eee3f7 100644 (file)
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -805,7 +805,7 @@ next_slot:
                if (start > key.offset && end < extent_end) {
                        BUG_ON(del_nr > 0);
                        if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
-                               ret = -EINVAL;
+                               ret = -EOPNOTSUPP;
                                break;
                        }
 
@@ -851,7 +851,7 @@ next_slot:
                 */
                if (start <= key.offset && end < extent_end) {
                        if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
-                               ret = -EINVAL;
+                               ret = -EOPNOTSUPP;
                                break;
                        }
 
@@ -877,7 +877,7 @@ next_slot:
                if (start > key.offset && end >= extent_end) {
                        BUG_ON(del_nr > 0);
                        if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
-                               ret = -EINVAL;
+                               ret = -EOPNOTSUPP;
                                break;
                        }
 

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index f2e8fcc..7b001ab 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3088,7 +3088,7 @@ process_slot:
                                                         new_key.offset + datal,
                                                         1);
                                if (ret) {
-                                       if (ret != -EINVAL)
+                                       if (ret != -EOPNOTSUPP)
                                                btrfs_abort_transaction(trans,
                                                                root, ret);
                                        btrfs_end_transaction(trans, root);
@@ -3163,7 +3163,7 @@ process_slot:
                                                         new_key.offset + datal,
                                                         1);
                                if (ret) {
-                                       if (ret != -EINVAL)
+                                       if (ret != -EOPNOTSUPP)
                                                btrfs_abort_transaction(trans,
                                                        root, ret);
                                        btrfs_end_transaction(trans, root);