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/hfsplus/dir.c b/fs/hfsplus/dir.c
index 42e128661dc1..ca64a75f12b3 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -530,10 +530,14 @@ static int hfsplus_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 }
 
 static int hfsplus_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 res;
 
+        if (flags & ~RENAME_NOREPLACE)
+                return -EINVAL;
+
         /* Unlink destination if it already exists */
         if (d_really_is_positive(new_dentry)) {
                 if (d_is_dir(new_dentry))
@@ -561,7 +565,7 @@ const struct inode_operations hfsplus_dir_inode_operations = {
         .rmdir                  = hfsplus_rmdir,
         .symlink                = hfsplus_symlink,
         .mknod                  = hfsplus_mknod,
-        .rename                 = hfsplus_rename,
+        .rename2                = hfsplus_rename,
         .setxattr               = generic_setxattr,
         .getxattr               = generic_getxattr,
         .listxattr              = hfsplus_listxattr,