diff options
| author | Alexander Block | 2012-08-01 14:48:59 +0200 |
|---|---|---|
| committer | Chris Mason | 2012-10-01 15:19:00 -0400 |
| commit | 6d85ed05e16e7ff747025c8374f23d7d81c98540 (patch) | |
| tree | d1c045d6cbc6f7ed4a4e92714664728d57b55fb6 | |
| parent | 2981e225f7048b36470383bf5622c42139bd96f7 (diff) | |
Btrfs: don't treat top/root directory inode as deleted/reused
We can't do the deleted/reused logic for top/root inodes as it would
create a stream that tries to delete and recreate the root dir.
Reported-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
Signed-off-by: Alexander Block <ablock84@googlemail.com>
| -rw-r--r-- | fs/btrfs/send.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index a4011a9148fd..d17d75ebc482 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -2627,6 +2627,12 @@ static int can_rmdir(struct send_ctx *sctx, u64 dir, u64 send_progress) struct btrfs_key loc; struct btrfs_dir_item *di; + /* + * Don't try to rmdir the top/root subvolume dir. + */ + if (dir == BTRFS_FIRST_FREE_OBJECTID) + return 0; + path = alloc_path_for_send(); if (!path) return -ENOMEM; @@ -2687,6 +2693,12 @@ static int process_recorded_refs(struct send_ctx *sctx) verbose_printk("btrfs: process_recorded_refs %llu\n", sctx->cur_ino); + /* + * This should never happen as the root dir always has the same ref + * which is always '..' + */ + BUG_ON(sctx->cur_ino <= BTRFS_FIRST_FREE_OBJECTID); + valid_path = fs_path_alloc(sctx); if (!valid_path) { ret = -ENOMEM; @@ -4094,7 +4106,14 @@ static int changed_inode(struct send_ctx *sctx, right_gen = btrfs_inode_generation(sctx->right_path->nodes[0], right_ii); - if (left_gen != right_gen) + + /* + * The cur_ino = root dir case is special here. We can't treat + * the inode as deleted+reused because it would generate a + * stream that tries to delete/mkdir the root dir. + */ + if (left_gen != right_gen && + sctx->cur_ino != BTRFS_FIRST_FREE_OBJECTID) sctx->cur_inode_new_gen = 1; } |