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| author | Olga Kornievskaia <kolga@netapp.com> | 2019-04-11 21:34:18 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-04-11 22:23:48 +0300 |
| commit | 0769663b4f580566ef6cdf366f3073dbe8022c39 (patch) | |
| tree | 96eb99500c11d736c336f960b3e12bbdeb132e51 /fs/nfs/nfs4file.c | |
| parent | e1ede312f17e96a9c5cda9aaa1cdcf442c1a5da8 (diff) | |
| download | linux-0769663b4f580566ef6cdf366f3073dbe8022c39.tar.xz | |
NFSv4.1 fix incorrect return value in copy_file_range
According to the NFSv4.2 spec if the input and output file is the
same file, operation should fail with EINVAL. However, linux
copy_file_range() system call has no such restrictions. Therefore,
in such case let's return EOPNOTSUPP and allow VFS to fallback
to doing do_splice_direct(). Also when copy_file_range is called
on an NFSv4.0 or 4.1 mount (ie., a server that doesn't support
COPY functionality), we also need to return EOPNOTSUPP and
fallback to a regular copy.
Fixes xfstest generic/075, generic/091, generic/112, generic/263
for all NFSv4.x versions.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/nfs4file.c')
| -rw-r--r-- | fs/nfs/nfs4file.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 45b2322e092d..00d17198ee12 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -133,8 +133,10 @@ static ssize_t nfs4_copy_file_range(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, size_t count, unsigned int flags) { + if (!nfs_server_capable(file_inode(file_out), NFS_CAP_COPY)) + return -EOPNOTSUPP; if (file_inode(file_in) == file_inode(file_out)) - return -EINVAL; + return -EOPNOTSUPP; return nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count); } |