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Revert "btrfs: clean up our handling of refs == 0 in snapshot delete"

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This reverts commit c6dfc73da3.
This commit is contained in:
Ksawlii 2024-11-24 00:23:39 +01:00
parent f8bda51205
commit 9dfd5971af
1 changed files with 5 additions and 23 deletions
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28
fs/btrfs/extent-tree.c
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@ -4806,15 +4806,7 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans,
/* We don't care about errors in readahead. */
if (ret < 0)
continue;
/*
* This could be racey, it's conceivable that we raced and end
* up with a bogus refs count, if that's the case just skip, if
* we are actually corrupt we will notice when we look up
* everything again with our locks.
*/
if (refs == 0)
continue;
BUG_ON(refs == 0);
if (wc->stage == DROP_REFERENCE) {
if (refs == 1)
@ -4881,11 +4873,7 @@ static noinline int walk_down_proc(struct btrfs_trans_handle *trans,
BUG_ON(ret == -ENOMEM);
if (ret)
return ret;
if (unlikely(wc->refs[level] == 0)) {
btrfs_err(fs_info, "bytenr %llu has 0 references, expect > 0",
eb->start);
return -EUCLEAN;
}
BUG_ON(wc->refs[level] == 0);
}
if (wc->stage == DROP_REFERENCE) {
@ -5018,9 +5006,8 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
goto out_unlock;
if (unlikely(wc->refs[level - 1] == 0)) {
btrfs_err(fs_info, "bytenr %llu has 0 references, expect > 0",
bytenr);
ret = -EUCLEAN;
btrfs_err(fs_info, "Missing references.");
ret = -EIO;
goto out_unlock;
}
*lookup_info = 0;
@ -5222,12 +5209,7 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans,
path->locks[level] = 0;
return ret;
}
if (unlikely(wc->refs[level] == 0)) {
btrfs_tree_unlock_rw(eb, path->locks[level]);
btrfs_err(fs_info, "bytenr %llu has 0 references, expect > 0",
eb->start);
return -EUCLEAN;
}
BUG_ON(wc->refs[level] == 0);
if (wc->refs[level] == 1) {
btrfs_tree_unlock_rw(eb, path->locks[level]);
path->locks[level] = 0;