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Diffstat (limited to 'libbcachefs/snapshot.c')
-rw-r--r--libbcachefs/snapshot.c124
1 files changed, 67 insertions, 57 deletions
diff --git a/libbcachefs/snapshot.c b/libbcachefs/snapshot.c
index 315e88cc..e9af77b3 100644
--- a/libbcachefs/snapshot.c
+++ b/libbcachefs/snapshot.c
@@ -30,17 +30,18 @@ void bch2_snapshot_tree_to_text(struct printbuf *out, struct bch_fs *c,
le32_to_cpu(t.v->root_snapshot));
}
-int bch2_snapshot_tree_invalid(const struct bch_fs *c, struct bkey_s_c k,
+int bch2_snapshot_tree_invalid(struct bch_fs *c, struct bkey_s_c k,
enum bkey_invalid_flags flags,
struct printbuf *err)
{
- if (bkey_gt(k.k->p, POS(0, U32_MAX)) ||
- bkey_lt(k.k->p, POS(0, 1))) {
- prt_printf(err, "bad pos");
- return -BCH_ERR_invalid_bkey;
- }
+ int ret = 0;
- return 0;
+ bkey_fsck_err_on(bkey_gt(k.k->p, POS(0, U32_MAX)) ||
+ bkey_lt(k.k->p, POS(0, 1)), c, err,
+ snapshot_tree_pos_bad,
+ "bad pos");
+fsck_err:
+ return ret;
}
int bch2_snapshot_tree_lookup(struct btree_trans *trans, u32 id,
@@ -202,68 +203,60 @@ void bch2_snapshot_to_text(struct printbuf *out, struct bch_fs *c,
le32_to_cpu(s.v->skip[2]));
}
-int bch2_snapshot_invalid(const struct bch_fs *c, struct bkey_s_c k,
+int bch2_snapshot_invalid(struct bch_fs *c, struct bkey_s_c k,
enum bkey_invalid_flags flags,
struct printbuf *err)
{
struct bkey_s_c_snapshot s;
u32 i, id;
+ int ret = 0;
- if (bkey_gt(k.k->p, POS(0, U32_MAX)) ||
- bkey_lt(k.k->p, POS(0, 1))) {
- prt_printf(err, "bad pos");
- return -BCH_ERR_invalid_bkey;
- }
+ bkey_fsck_err_on(bkey_gt(k.k->p, POS(0, U32_MAX)) ||
+ bkey_lt(k.k->p, POS(0, 1)), c, err,
+ snapshot_pos_bad,
+ "bad pos");
s = bkey_s_c_to_snapshot(k);
id = le32_to_cpu(s.v->parent);
- if (id && id <= k.k->p.offset) {
- prt_printf(err, "bad parent node (%u <= %llu)",
- id, k.k->p.offset);
- return -BCH_ERR_invalid_bkey;
- }
+ bkey_fsck_err_on(id && id <= k.k->p.offset, c, err,
+ snapshot_parent_bad,
+ "bad parent node (%u <= %llu)",
+ id, k.k->p.offset);
- if (le32_to_cpu(s.v->children[0]) < le32_to_cpu(s.v->children[1])) {
- prt_printf(err, "children not normalized");
- return -BCH_ERR_invalid_bkey;
- }
+ bkey_fsck_err_on(le32_to_cpu(s.v->children[0]) < le32_to_cpu(s.v->children[1]), c, err,
+ snapshot_children_not_normalized,
+ "children not normalized");
- if (s.v->children[0] &&
- s.v->children[0] == s.v->children[1]) {
- prt_printf(err, "duplicate child nodes");
- return -BCH_ERR_invalid_bkey;
- }
+ bkey_fsck_err_on(s.v->children[0] && s.v->children[0] == s.v->children[1], c, err,
+ snapshot_child_duplicate,
+ "duplicate child nodes");
for (i = 0; i < 2; i++) {
id = le32_to_cpu(s.v->children[i]);
- if (id >= k.k->p.offset) {
- prt_printf(err, "bad child node (%u >= %llu)",
- id, k.k->p.offset);
- return -BCH_ERR_invalid_bkey;
- }
+ bkey_fsck_err_on(id >= k.k->p.offset, c, err,
+ snapshot_child_bad,
+ "bad child node (%u >= %llu)",
+ id, k.k->p.offset);
}
if (bkey_val_bytes(k.k) > offsetof(struct bch_snapshot, skip)) {
- if (le32_to_cpu(s.v->skip[0]) > le32_to_cpu(s.v->skip[1]) ||
- le32_to_cpu(s.v->skip[1]) > le32_to_cpu(s.v->skip[2])) {
- prt_printf(err, "skiplist not normalized");
- return -BCH_ERR_invalid_bkey;
- }
+ bkey_fsck_err_on(le32_to_cpu(s.v->skip[0]) > le32_to_cpu(s.v->skip[1]) ||
+ le32_to_cpu(s.v->skip[1]) > le32_to_cpu(s.v->skip[2]), c, err,
+ snapshot_skiplist_not_normalized,
+ "skiplist not normalized");
for (i = 0; i < ARRAY_SIZE(s.v->skip); i++) {
id = le32_to_cpu(s.v->skip[i]);
- if ((id && !s.v->parent) ||
- (id && id <= k.k->p.offset)) {
- prt_printf(err, "bad skiplist node %u", id);
- return -BCH_ERR_invalid_bkey;
- }
+ bkey_fsck_err_on(id && id < le32_to_cpu(s.v->parent), c, err,
+ snapshot_skiplist_bad,
+ "bad skiplist node %u", id);
}
}
-
- return 0;
+fsck_err:
+ return ret;
}
static void __set_is_ancestor_bitmap(struct bch_fs *c, u32 id)
@@ -530,7 +523,7 @@ static int check_snapshot_tree(struct btree_trans *trans,
if (fsck_err_on(ret ||
root_id != bch2_snapshot_root(c, root_id) ||
st.k->p.offset != le32_to_cpu(s.tree),
- c,
+ c, snapshot_tree_to_missing_snapshot,
"snapshot tree points to missing/incorrect snapshot:\n %s",
(bch2_bkey_val_to_text(&buf, c, st.s_c), buf.buf))) {
ret = bch2_btree_delete_at(trans, iter, 0);
@@ -542,17 +535,20 @@ static int check_snapshot_tree(struct btree_trans *trans,
if (ret && !bch2_err_matches(ret, ENOENT))
goto err;
- if (fsck_err_on(ret, c,
+ if (fsck_err_on(ret,
+ c, snapshot_tree_to_missing_subvol,
"snapshot tree points to missing subvolume:\n %s",
(printbuf_reset(&buf),
bch2_bkey_val_to_text(&buf, c, st.s_c), buf.buf)) ||
fsck_err_on(!bch2_snapshot_is_ancestor_early(c,
le32_to_cpu(subvol.snapshot),
- root_id), c,
+ root_id),
+ c, snapshot_tree_to_wrong_subvol,
"snapshot tree points to subvolume that does not point to snapshot in this tree:\n %s",
(printbuf_reset(&buf),
bch2_bkey_val_to_text(&buf, c, st.s_c), buf.buf)) ||
- fsck_err_on(BCH_SUBVOLUME_SNAP(&subvol), c,
+ fsck_err_on(BCH_SUBVOLUME_SNAP(&subvol),
+ c, snapshot_tree_to_snapshot_subvol,
"snapshot tree points to snapshot subvolume:\n %s",
(printbuf_reset(&buf),
bch2_bkey_val_to_text(&buf, c, st.s_c), buf.buf))) {
@@ -788,7 +784,9 @@ static int check_snapshot(struct btree_trans *trans,
goto err;
}
} else {
- if (fsck_err_on(s.subvol, c, "snapshot should not point to subvol:\n %s",
+ if (fsck_err_on(s.subvol,
+ c, snapshot_should_not_have_subvol,
+ "snapshot should not point to subvol:\n %s",
(bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
u = bch2_bkey_make_mut_typed(trans, iter, &k, 0, snapshot);
ret = PTR_ERR_OR_ZERO(u);
@@ -804,7 +802,8 @@ static int check_snapshot(struct btree_trans *trans,
if (ret < 0)
goto err;
- if (fsck_err_on(!ret, c, "snapshot points to missing/incorrect tree:\n %s",
+ if (fsck_err_on(!ret, c, snapshot_to_bad_snapshot_tree,
+ "snapshot points to missing/incorrect tree:\n %s",
(bch2_bkey_val_to_text(&buf, c, k), buf.buf))) {
ret = snapshot_tree_ptr_repair(trans, iter, k, &s);
if (ret)
@@ -816,7 +815,8 @@ static int check_snapshot(struct btree_trans *trans,
if (le32_to_cpu(s.depth) != real_depth &&
(c->sb.version_upgrade_complete < bcachefs_metadata_version_snapshot_skiplists ||
- fsck_err(c, "snapshot with incorrect depth field, should be %u:\n %s",
+ fsck_err(c, snapshot_bad_depth,
+ "snapshot with incorrect depth field, should be %u:\n %s",
real_depth, (bch2_bkey_val_to_text(&buf, c, k), buf.buf)))) {
u = bch2_bkey_make_mut_typed(trans, iter, &k, 0, snapshot);
ret = PTR_ERR_OR_ZERO(u);
@@ -833,7 +833,8 @@ static int check_snapshot(struct btree_trans *trans,
if (!ret &&
(c->sb.version_upgrade_complete < bcachefs_metadata_version_snapshot_skiplists ||
- fsck_err(c, "snapshot with bad skiplist field:\n %s",
+ fsck_err(c, snapshot_bad_skiplist,
+ "snapshot with bad skiplist field:\n %s",
(bch2_bkey_val_to_text(&buf, c, k), buf.buf)))) {
u = bch2_bkey_make_mut_typed(trans, iter, &k, 0, snapshot);
ret = PTR_ERR_OR_ZERO(u);
@@ -1348,12 +1349,12 @@ static int bch2_fix_child_of_deleted_snapshot(struct btree_trans *trans,
u32 id = le32_to_cpu(s->v.skip[j]);
if (snapshot_list_has_id(deleted, id)) {
- id = depth > 1
- ? bch2_snapshot_nth_parent_skip(c,
+ id = bch2_snapshot_nth_parent_skip(c,
parent,
- get_random_u32_below(depth - 1),
- deleted)
- : parent;
+ depth > 1
+ ? get_random_u32_below(depth - 1)
+ : 0,
+ deleted);
s->v.skip[j] = cpu_to_le32(id);
}
}
@@ -1436,6 +1437,15 @@ int bch2_delete_dead_snapshots(struct bch_fs *c)
if (!btree_type_has_snapshots(id))
continue;
+ /*
+ * deleted inodes btree is maintained by a trigger on the inodes
+ * btree - no work for us to do here, and it's not safe to scan
+ * it because we'll see out of date keys due to the btree write
+ * buffer:
+ */
+ if (id == BTREE_ID_deleted_inodes)
+ continue;
+
ret = for_each_btree_key_commit(trans, iter,
id, POS_MIN,
BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-01 05:58:18 +0000