nfs: disable client side deduplication
diff mbox series

Message ID 20190531210605.GA5381@magnolia
State New
Headers show
Series
  • nfs: disable client side deduplication
Related show

Commit Message

Darrick J. Wong May 31, 2019, 9:06 p.m. UTC
From: Darrick J. Wong <darrick.wong@oracle.com>

The NFS protocol doesn't support deduplication, so turn it off again.

Fixes: ce96e888fe48e ("Fix nfs4.2 return -EINVAL when do dedupe operation")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/nfs/nfs4file.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index cf42a8b939e3..1915f24bba85 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -187,7 +187,11 @@  static loff_t nfs42_remap_file_range(struct file *src_file, loff_t src_off,
 	bool same_inode = false;
 	int ret;
 
-	if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
+	/* NFS does not support deduplication. */
+	if (remap_flags & REMAP_FILE_DEDUP)
+		return -EOPNOTSUPP;
+
+	if (remap_flags & ~REMAP_FILE_ADVISORY)
 		return -EINVAL;
 
 	/* check alignment w.r.t. clone_blksize */