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authorDarrick J. Wong <darrick.wong@oracle.com>2019-05-31 14:06:05 -0700
committerTrond Myklebust <trond.myklebust@hammerspace.com>2019-07-06 14:54:53 -0400
commit9026b3a973b0b0b73c15ba40aff87cd0959fd0f3 (patch)
tree39b93060f7cf037a34b158ab3f2ac21be46866ba /fs/nfs
parent1a7441b282cef3bb94acaba9f474ebc6d22277ba (diff)
downloadlinux-stericsson-9026b3a973b0b0b73c15ba40aff87cd0959fd0f3.tar.gz
nfs: disable client side deduplication
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> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4file.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 3a507c42c1ca..52dbd17e401e 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 */