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>

fs/jfs/namei.c

@@ -1078,7 +1078,8 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry,
  * FUNCTION:	rename a file or directory
  */
 static int jfs_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 btstack btstack;
 	ino_t ino;
@@ -1097,6 +1098,8 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	s64 new_size = 0;
 	int commit_flag;
 
+	if (flags & ~RENAME_NOREPLACE)
+		return -EINVAL;
 
 	jfs_info("jfs_rename: %pd %pd", old_dentry, new_dentry);
 
@@ -1536,7 +1539,7 @@ const struct inode_operations jfs_dir_inode_operations = {
 	.mkdir		= jfs_mkdir,
 	.rmdir		= jfs_rmdir,
 	.mknod		= jfs_mknod,
-	.rename		= jfs_rename,
+	.rename2	= jfs_rename,
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,
 	.listxattr	= jfs_listxattr,