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/reiserfs/namei.c b/fs/reiserfs/namei.c
index 8a36696d6df9..21b4b7138985 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -1306,7 +1306,8 @@ static void set_ino_in_dir_entry(struct reiserfs_dir_entry *de,
  * get_empty_nodes or its clones
  */
 static int reiserfs_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;
         INITIALIZE_PATH(old_entry_path);
@@ -1321,6 +1322,9 @@ static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         unsigned long savelink = 1;
         struct timespec ctime;
 
+        if (flags & ~RENAME_NOREPLACE)
+                return -EINVAL;
+
         /*
          * three balancings: (1) old name removal, (2) new name insertion
          * and (3) maybe "save" link insertion
@@ -1648,7 +1652,7 @@ const struct inode_operations reiserfs_dir_inode_operations = {
         .mkdir = reiserfs_mkdir,
         .rmdir = reiserfs_rmdir,
         .mknod = reiserfs_mknod,
-        .rename = reiserfs_rename,
+        .rename2 = reiserfs_rename,
         .setattr = reiserfs_setattr,
         .setxattr = generic_setxattr,
         .getxattr = generic_getxattr,