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authorOlga Kornievskaia <kolga@netapp.com>2019-04-11 14:34:18 -0400
committerTrond Myklebust <trond.myklebust@hammerspace.com>2019-04-11 15:23:48 -0400
commit0769663b4f580566ef6cdf366f3073dbe8022c39 (patch)
tree96eb99500c11d736c336f960b3e12bbdeb132e51 /fs/nfs
parente1ede312f17e96a9c5cda9aaa1cdcf442c1a5da8 (diff)
downloadlinux-0769663b4f580566ef6cdf366f3073dbe8022c39.tar.bz2
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')
-rw-r--r--fs/nfs/nfs42proc.c3
-rw-r--r--fs/nfs/nfs4file.c4
2 files changed, 3 insertions, 4 deletions
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index ff6f85fb676b..5196bfa7894d 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -329,9 +329,6 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
};
ssize_t err, err2;
- if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
- return -EOPNOTSUPP;
-
src_lock = nfs_get_lock_context(nfs_file_open_context(src));
if (IS_ERR(src_lock))
return PTR_ERR(src_lock);
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);
}