From: Brian Foster bfoster@redhat.com
[ Upstream commit 79a1d88a36f77374c77fd41a4386d8c2736b8704 ]
_nfsd_copy_file_range() calls vfs_fsync_range() with an offset and count (bytes written), but the former wants the start and end bytes of the range to sync. Fix it up.
Fixes: eac0b17a77fb ("NFSD add vfs_fsync after async copy is done") Signed-off-by: Brian Foster bfoster@redhat.com Tested-by: Dai Ngo dai.ngo@oracle.com Signed-off-by: Chuck Lever chuck.lever@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nfsd/nfs4proc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index b71a3c2d9409..cfc2da445658 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1650,6 +1650,7 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy, u64 src_pos = copy->cp_src_pos; u64 dst_pos = copy->cp_dst_pos; int status; + loff_t end;
/* See RFC 7862 p.67: */ if (bytes_total == 0) @@ -1669,8 +1670,8 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy, /* for a non-zero asynchronous copy do a commit of data */ if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) { since = READ_ONCE(dst->f_wb_err); - status = vfs_fsync_range(dst, copy->cp_dst_pos, - copy->cp_res.wr_bytes_written, 0); + end = copy->cp_dst_pos + copy->cp_res.wr_bytes_written - 1; + status = vfs_fsync_range(dst, copy->cp_dst_pos, end, 0); if (!status) status = filemap_check_wb_err(dst->f_mapping, since); if (!status)