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Subject[PATCH 5.0 63/93] cifs: fix that return -EINVAL when do dedupe operation
Date
[ Upstream commit b073a08016a10f01dfb0d0b6c7fa89da0d544963 ]

dedupe_file_range operations is combiled into remap_file_range.
But it's always skipped for dedupe operations in function
cifs_remap_file_range.

Example to test:
Before this patch:
# dd if=/dev/zero of=cifs/file bs=1M count=1
# xfs_io -c "dedupe cifs/file 4k 64k 4k" cifs/file
XFS_IOC_FILE_EXTENT_SAME: Invalid argument

After this patch:
# dd if=/dev/zero of=cifs/file bs=1M count=1
# xfs_io -c "dedupe cifs/file 4k 64k 4k" cifs/file
XFS_IOC_FILE_EXTENT_SAME: Operation not supported

Influence for xfstests:
generic/091
generic/112
generic/127
generic/263
These tests report this error "do_copy_range:: Invalid
argument" instead of "FIDEDUPERANGE: Invalid argument".
Because there are still two bugs cause these test failed.
https://bugzilla.kernel.org/show_bug.cgi?id=202935
https://bugzilla.kernel.org/show_bug.cgi?id=202785

Signed-off-by: Xiaoli Feng <fengxiaoli0714@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/cifs/cifsfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 07cad54b84f1..e8e125acd712 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1010,7 +1010,7 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
unsigned int xid;
int rc;

- if (remap_flags & ~REMAP_FILE_ADVISORY)
+ if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
return -EINVAL;

cifs_dbg(FYI, "clone range\n");
--
2.19.1


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