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bcachefs: Factor out check_subvol_dirent()

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Going to be adding more code here for checking subvol structure.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-02-05 03:22:29 -05:00
parent ce3e9283de
commit 11def1888f
2 changed files with 58 additions and 48 deletions
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1
MAINTAINERS
View File

@ -3536,6 +3536,7 @@ R: Brian Foster <bfoster@redhat.com>
L: linux-bcachefs@vger.kernel.org
S: Supported
C: irc://irc.oftc.net/bcache
T: git https://evilpiepirate.org/git/bcachefs.git
F: fs/bcachefs/
BDISP ST MEDIA DRIVER

105
fs/bcachefs/fsck.c
View File

@ -1593,6 +1593,58 @@ fsck_err:
return ret;
}
static int check_subvol_dirent(struct btree_trans *trans, struct btree_iter *iter,
struct bkey_s_c_dirent d)
{
struct bch_fs *c = trans->c;
struct bch_inode_unpacked subvol_root;
u32 target_subvol = le32_to_cpu(d.v->d_child_subvol);
u32 target_snapshot;
u64 target_inum;
int ret = 0;
ret = subvol_lookup(trans, target_subvol,
&target_snapshot, &target_inum);
if (ret && !bch2_err_matches(ret, ENOENT))
return ret;
if (fsck_err_on(ret, c, dirent_to_missing_subvol,
"dirent points to missing subvolume %u",
le32_to_cpu(d.v->d_child_subvol)))
return __remove_dirent(trans, d.k->p);
ret = lookup_inode(trans, target_inum,
&subvol_root, &target_snapshot);
if (ret && !bch2_err_matches(ret, ENOENT))
return ret;
if (fsck_err_on(ret, c, subvol_to_missing_root,
"subvolume %u points to missing subvolume root %llu",
target_subvol,
target_inum)) {
bch_err(c, "repair not implemented yet");
return -EINVAL;
}
if (fsck_err_on(subvol_root.bi_subvol != target_subvol,
c, subvol_root_wrong_bi_subvol,
"subvol root %llu has wrong bi_subvol field: got %u, should be %u",
target_inum,
subvol_root.bi_subvol, target_subvol)) {
subvol_root.bi_subvol = target_subvol;
ret = __bch2_fsck_write_inode(trans, &subvol_root, target_snapshot);
if (ret)
return ret;
}
ret = check_dirent_target(trans, iter, d, &subvol_root,
target_snapshot);
if (ret)
return ret;
fsck_err:
return ret;
}
static int check_dirent(struct btree_trans *trans, struct btree_iter *iter,
struct bkey_s_c k,
struct bch_hash_info *hash_info,
@ -1677,50 +1729,7 @@ static int check_dirent(struct btree_trans *trans, struct btree_iter *iter,
d = bkey_s_c_to_dirent(k);
if (d.v->d_type == DT_SUBVOL) {
struct bch_inode_unpacked subvol_root;
u32 target_subvol = le32_to_cpu(d.v->d_child_subvol);
u32 target_snapshot;
u64 target_inum;
ret = subvol_lookup(trans, target_subvol,
&target_snapshot, &target_inum);
if (ret && !bch2_err_matches(ret, ENOENT))
goto err;
if (fsck_err_on(ret, c, dirent_to_missing_subvol,
"dirent points to missing subvolume %u",
le32_to_cpu(d.v->d_child_subvol))) {
ret = __remove_dirent(trans, d.k->p);
goto err;
}
ret = lookup_inode(trans, target_inum,
&subvol_root, &target_snapshot);
if (ret && !bch2_err_matches(ret, ENOENT))
goto err;
if (fsck_err_on(ret, c, subvol_to_missing_root,
"subvolume %u points to missing subvolume root %llu",
target_subvol,
target_inum)) {
bch_err(c, "repair not implemented yet");
ret = -EINVAL;
goto err;
}
if (fsck_err_on(subvol_root.bi_subvol != target_subvol,
c, subvol_root_wrong_bi_subvol,
"subvol root %llu has wrong bi_subvol field: got %u, should be %u",
target_inum,
subvol_root.bi_subvol, target_subvol)) {
subvol_root.bi_subvol = target_subvol;
ret = __bch2_fsck_write_inode(trans, &subvol_root, target_snapshot);
if (ret)
goto err;
}
ret = check_dirent_target(trans, iter, d, &subvol_root,
target_snapshot);
ret = check_subvol_dirent(trans, iter, d);
if (ret)
goto err;
} else {
@ -1746,11 +1755,11 @@ static int check_dirent(struct btree_trans *trans, struct btree_iter *iter,
if (ret)
goto err;
}
}
if (d.v->d_type == DT_DIR)
for_each_visible_inode(c, s, dir, equiv.snapshot, i)
i->count++;
if (d.v->d_type == DT_DIR)
for_each_visible_inode(c, s, dir, equiv.snapshot, i)
i->count++;
}
out:
err:
fsck_err: