NFSv4.2: Fixup CLONE dest file size for zero-length count
authorBenjamin Coddington <bcodding@redhat.com>
Thu, 13 Oct 2022 15:58:01 +0000 (11:58 -0400)
committerAnna Schumaker <Anna.Schumaker@Netapp.com>
Thu, 27 Oct 2022 19:52:10 +0000 (15:52 -0400)
commit038efb6348ce96228f6828354cb809c22a661681
treeee8fbf07ed6e8a8931bcea50136d113f9a81f9e2
parent8a0fa3ff3b606b55c4edc71ad133e61529b64549
NFSv4.2: Fixup CLONE dest file size for zero-length count

When holding a delegation, the NFS client optimizes away setting the
attributes of a file from the GETATTR in the compound after CLONE, and for
a zero-length CLONE we will end up setting the inode's size to zero in
nfs42_copy_dest_done().  Handle this case by computing the resulting count
from the server's reported size after CLONE's GETATTR.

Suggested-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: 94d202d5ca39 ("NFSv42: Copy offload should update the file size when appropriate")
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
fs/nfs/nfs42proc.c