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inode numbering: change libfs sb creation routines to avoid collisions with their root inodes

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This patch makes it so that simple_fill_super and get_sb_pseudo assign their
root inodes to be number 1.  It also fixes up a couple of callers of
simple_fill_super that were passing in files arrays that had an index at
number 1, and adds a warning for any caller that sends in such an array.

It would have been nice to have made it so that it wasn't possible to make
such a collision, but some callers need to be able to control what inode
number their entries get, so I think this is the best that can be done.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Layton 2007-05-08 00:32:31 -07:00 • committed by Linus Torvalds
parent 866b04fccb
commit 1a1c9bb433
3 changed files with 26 additions and 3 deletions
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4
fs/binfmt_misc.c
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@ -727,8 +727,8 @@ static const struct super_operations s_ops = {
static int bm_fill_super(struct super_block * sb, void * data, int silent)
{
static struct tree_descr bm_files[] = {
[1] = {"status", &bm_status_operations, S_IWUSR|S_IRUGO},
[2] = {"register", &bm_register_operations, S_IWUSR},
[2] = {"status", &bm_status_operations, S_IWUSR|S_IRUGO},
[3] = {"register", &bm_register_operations, S_IWUSR},
/* last one */ {""}
};
int err = simple_fill_super(sb, 0x42494e4d, bm_files);