fs: make remaining filesystems use .rename2

This is trivial to do:

 - add flags argument to foo_rename()
 - check if flags is zero
 - assign foo_rename() to .rename2 instead of .rename

This doesn't mean it's impossible to support RENAME_NOREPLACE for these
filesystems, but it is not trivial, like for local filesystems.
RENAME_NOREPLACE must guarantee atomicity (i.e. it shouldn't be possible
for a file to be created on one host while it is overwritten by rename on
another host).

Filesystems converted:

9p, afs, ceph, coda, ecryptfs, kernfs, lustre, ncpfs, nfs, ocfs2, orangefs.

After this, we can get rid of the duplicate interfaces for rename.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: David Howells <dhowells@redhat.com> [AFS]
Acked-by: Mike Marshall <hubcap@omnibond.com>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: Jan Harkes <jaharkes@cs.cmu.edu>
Cc: Tyler Hicks <tyhicks@canonical.com>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: Mark Fasheh <mfasheh@suse.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 8b1999b528e9..50ab1a615207 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -955,7 +955,8 @@ int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
 
 int
 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
-                struct inode *new_dir, struct dentry *new_dentry)
+                struct inode *new_dir, struct dentry *new_dentry,
+                unsigned int flags)
 {
         int retval;
         struct inode *old_inode;
@@ -966,6 +967,9 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         struct p9_fid *newdirfid;
         struct p9_wstat wstat;
 
+        if (flags)
+                return -EINVAL;
+
         p9_debug(P9_DEBUG_VFS, "\n");
         retval = 0;
         old_inode = d_inode(old_dentry);
@@ -1436,7 +1440,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = {
         .mkdir = v9fs_vfs_mkdir,
         .rmdir = v9fs_vfs_rmdir,
         .mknod = v9fs_vfs_mknod,
-        .rename = v9fs_vfs_rename,
+        .rename2 = v9fs_vfs_rename,
         .getattr = v9fs_vfs_getattr,
         .setattr = v9fs_vfs_setattr,
 };
@@ -1449,7 +1453,7 @@ static const struct inode_operations v9fs_dir_inode_operations = {
         .mkdir = v9fs_vfs_mkdir,
         .rmdir = v9fs_vfs_rmdir,
         .mknod = v9fs_vfs_mknod,
-        .rename = v9fs_vfs_rename,
+        .rename2 = v9fs_vfs_rename,
         .getattr = v9fs_vfs_getattr,
         .setattr = v9fs_vfs_setattr,
 };