fs: support RENAME_NOREPLACE for local filesystems

This is trivial to do:

 - add flags argument to foo_rename()
 - check if flags doesn't have any other than RENAME_NOREPLACE
 - assign foo_rename() to .rename2 instead of .rename

Filesystems converted:

affs, bfs, exofs, ext2, hfs, hfsplus, jffs2, jfs, logfs, minix, msdos,
nilfs2, omfs, reiserfs, sysvfs, ubifs, udf, ufs, vfat.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Boaz Harrosh <ooo@electrozaur.com>
Acked-by: Richard Weinberger <richard@nod.at>
Acked-by: Bob Copeland <me@bobcopeland.com>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Dave Kleikamp <shaggy@kernel.org>
Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Christoph Hellwig <hch@infradead.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index c3e5c9679371..ca2ec0061802 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -1093,7 +1093,8 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
  * higher-level routines.
  */
 static int udf_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)
 {
         struct inode *old_inode = d_inode(old_dentry);
         struct inode *new_inode = d_inode(new_dentry);
@@ -1105,6 +1106,9 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
         struct kernel_lb_addr tloc;
         struct udf_inode_info *old_iinfo = UDF_I(old_inode);
 
+        if (flags & ~RENAME_NOREPLACE)
+                return -EINVAL;
+
         ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
         if (IS_ERR(ofi)) {
                 retval = PTR_ERR(ofi);
@@ -1353,6 +1357,6 @@ const struct inode_operations udf_dir_inode_operations = {
         .mkdir                          = udf_mkdir,
         .rmdir                          = udf_rmdir,
         .mknod                          = udf_mknod,
-        .rename                         = udf_rename,
+        .rename2                        = udf_rename,
         .tmpfile                        = udf_tmpfile,
 };