? node_start
: bpos_successor(prev->k->k.p);
char buf1[200], buf2[200];
- bool update_min = false;
- bool update_max = false;
int ret = 0;
if (cur.k->k.type == KEY_TYPE_btree_ptr_v2) {
bch2_bkey_val_to_text(&PBUF(buf1), c, bkey_i_to_s_c(prev->k));
}
- if (fsck_err_on(bpos_cmp(expected_start, bp->v.min_key), c,
- "btree node with incorrect min_key at btree %s level %u:\n"
- " prev %s\n"
- " cur %s",
- bch2_btree_ids[b->c.btree_id], b->c.level,
- buf1,
- (bch2_bkey_val_to_text(&PBUF(buf2), c, bkey_i_to_s_c(cur.k)), buf2)))
- update_min = true;
+ if (bpos_cmp(expected_start, bp->v.min_key)) {
+ bch2_topology_error(c);
+
+ if (fsck_err(c, "btree node with incorrect min_key at btree %s level %u:\n"
+ " prev %s\n"
+ " cur %s",
+ bch2_btree_ids[b->c.btree_id], b->c.level,
+ buf1,
+ (bch2_bkey_val_to_text(&PBUF(buf2), c, bkey_i_to_s_c(cur.k)), buf2))) {
+ bch_info(c, "Halting mark and sweep to start topology repair pass");
+ return FSCK_ERR_START_TOPOLOGY_REPAIR;
+ } else {
+ set_bit(BCH_FS_INITIAL_GC_UNFIXED, &c->flags);
+ }
+ }
+ }
+
+ if (is_last && bpos_cmp(cur.k->k.p, node_end)) {
+ bch2_topology_error(c);
+
+ if (fsck_err(c, "btree node with incorrect max_key at btree %s level %u:\n"
+ " %s\n"
+ " expected %s",
+ bch2_btree_ids[b->c.btree_id], b->c.level,
+ (bch2_bkey_val_to_text(&PBUF(buf1), c, bkey_i_to_s_c(cur.k)), buf1),
+ (bch2_bpos_to_text(&PBUF(buf2), node_end), buf2))) {
+ bch_info(c, "Halting mark and sweep to start topology repair pass");
+ return FSCK_ERR_START_TOPOLOGY_REPAIR;
+ } else {
+ set_bit(BCH_FS_INITIAL_GC_UNFIXED, &c->flags);
+ }
+ }
+
+ bch2_bkey_buf_copy(prev, c, cur.k);
+fsck_err:
+ return ret;
+}
+
+static void btree_ptr_to_v2(struct btree *b, struct bkey_i_btree_ptr_v2 *dst)
+{
+ switch (b->key.k.type) {
+ case KEY_TYPE_btree_ptr: {
+ struct bkey_i_btree_ptr *src = bkey_i_to_btree_ptr(&b->key);
+
+ dst->k.p = src->k.p;
+ dst->v.mem_ptr = 0;
+ dst->v.seq = b->data->keys.seq;
+ dst->v.sectors_written = 0;
+ dst->v.flags = 0;
+ dst->v.min_key = b->data->min_key;
+ set_bkey_val_bytes(&dst->k, sizeof(dst->v) + bkey_val_bytes(&src->k));
+ memcpy(dst->v.start, src->v.start, bkey_val_bytes(&src->k));
+ break;
+ }
+ case KEY_TYPE_btree_ptr_v2:
+ bkey_copy(&dst->k_i, &b->key);
+ break;
+ default:
+ BUG();
+ }
+}
+
+static int set_node_min(struct bch_fs *c, struct btree *b, struct bpos new_min)
+{
+ struct bkey_i_btree_ptr_v2 *new;
+ int ret;
+
+ new = kmalloc(BKEY_BTREE_PTR_U64s_MAX * sizeof(u64), GFP_KERNEL);
+ if (!new)
+ return -ENOMEM;
+
+ btree_ptr_to_v2(b, new);
+ b->data->min_key = new_min;
+ new->v.min_key = new_min;
+ SET_BTREE_PTR_RANGE_UPDATED(&new->v, true);
+
+ ret = bch2_journal_key_insert(c, b->c.btree_id, b->c.level + 1, &new->k_i);
+ if (ret) {
+ kfree(new);
+ return ret;
+ }
+
+ bch2_btree_node_drop_keys_outside_node(b);
+
+ return 0;
+}
+
+static int set_node_max(struct bch_fs *c, struct btree *b, struct bpos new_max)
+{
+ struct bkey_i_btree_ptr_v2 *new;
+ int ret;
+
+ ret = bch2_journal_key_delete(c, b->c.btree_id, b->c.level + 1, b->key.k.p);
+ if (ret)
+ return ret;
+
+ new = kmalloc(BKEY_BTREE_PTR_U64s_MAX * sizeof(u64), GFP_KERNEL);
+ if (!new)
+ return -ENOMEM;
+
+ btree_ptr_to_v2(b, new);
+ b->data->max_key = new_max;
+ new->k.p = new_max;
+ SET_BTREE_PTR_RANGE_UPDATED(&new->v, true);
+
+ ret = bch2_journal_key_insert(c, b->c.btree_id, b->c.level + 1, &new->k_i);
+ if (ret) {
+ kfree(new);
+ return ret;
+ }
+
+ bch2_btree_node_drop_keys_outside_node(b);
+
+ mutex_lock(&c->btree_cache.lock);
+ bch2_btree_node_hash_remove(&c->btree_cache, b);
+
+ bkey_copy(&b->key, &new->k_i);
+ ret = __bch2_btree_node_hash_insert(&c->btree_cache, b);
+ BUG_ON(ret);
+ mutex_unlock(&c->btree_cache.lock);
+ return 0;
+}
+
+static int btree_repair_node_start(struct bch_fs *c, struct btree *b,
+ struct btree *prev, struct btree *cur)
+{
+ struct bpos expected_start = !prev
+ ? b->data->min_key
+ : bpos_successor(prev->key.k.p);
+ char buf1[200], buf2[200];
+ int ret = 0;
+
+ if (!prev) {
+ struct printbuf out = PBUF(buf1);
+ pr_buf(&out, "start of node: ");
+ bch2_bpos_to_text(&out, b->data->min_key);
+ } else {
+ bch2_bkey_val_to_text(&PBUF(buf1), c, bkey_i_to_s_c(&prev->key));
+ }
+
+ if (mustfix_fsck_err_on(bpos_cmp(expected_start, cur->data->min_key), c,
+ "btree node with incorrect min_key at btree %s level %u:\n"
+ " prev %s\n"
+ " cur %s",
+ bch2_btree_ids[b->c.btree_id], b->c.level,
+ buf1,
+ (bch2_bkey_val_to_text(&PBUF(buf2), c, bkey_i_to_s_c(&cur->key)), buf2))) {
+ if (prev &&
+ bpos_cmp(expected_start, cur->data->min_key) > 0 &&
+ BTREE_NODE_SEQ(cur->data) > BTREE_NODE_SEQ(prev->data))
+ ret = set_node_max(c, prev,
+ bpos_predecessor(cur->data->min_key));
+ else
+ ret = set_node_min(c, cur, expected_start);
+ if (ret)
+ return ret;
}
+fsck_err:
+ return ret;
+}
- if (fsck_err_on(is_last &&
- bpos_cmp(cur.k->k.p, node_end), c,
+static int btree_repair_node_end(struct bch_fs *c, struct btree *b,
+ struct btree *child)
+{
+ char buf1[200], buf2[200];
+ int ret = 0;
+
+ if (mustfix_fsck_err_on(bpos_cmp(child->key.k.p, b->key.k.p), c,
"btree node with incorrect max_key at btree %s level %u:\n"
" %s\n"
" expected %s",
bch2_btree_ids[b->c.btree_id], b->c.level,
- (bch2_bkey_val_to_text(&PBUF(buf1), c, bkey_i_to_s_c(cur.k)), buf1),
- (bch2_bpos_to_text(&PBUF(buf2), node_end), buf2)))
- update_max = true;
+ (bch2_bkey_val_to_text(&PBUF(buf1), c, bkey_i_to_s_c(&child->key)), buf1),
+ (bch2_bpos_to_text(&PBUF(buf2), b->key.k.p), buf2))) {
+ ret = set_node_max(c, child, b->key.k.p);
+ if (ret)
+ return ret;
+ }
+fsck_err:
+ return ret;
+}
- bch2_bkey_buf_copy(prev, c, cur.k);
+#define DROP_THIS_NODE 10
- if (update_min || update_max) {
- struct bkey_i *new;
- struct bkey_i_btree_ptr_v2 *bp = NULL;
- struct btree *n;
+static int bch2_btree_repair_topology_recurse(struct bch_fs *c, struct btree *b)
+{
+ struct btree_and_journal_iter iter;
+ struct bkey_s_c k;
+ struct bkey_buf tmp;
+ struct btree *prev = NULL, *cur = NULL;
+ bool have_child, dropped_children = false;
+ char buf[200];
+ int ret = 0;
- if (update_max) {
+ if (!b->c.level)
+ return 0;
+again:
+ have_child = dropped_children = false;
+ bch2_bkey_buf_init(&tmp);
+ bch2_btree_and_journal_iter_init_node_iter(&iter, c, b);
+
+ while ((k = bch2_btree_and_journal_iter_peek(&iter)).k) {
+ BUG_ON(bpos_cmp(k.k->p, b->data->min_key) < 0);
+ BUG_ON(bpos_cmp(k.k->p, b->data->max_key) > 0);
+
+ bch2_btree_and_journal_iter_advance(&iter);
+ bch2_bkey_buf_reassemble(&tmp, c, k);
+
+ cur = bch2_btree_node_get_noiter(c, tmp.k,
+ b->c.btree_id, b->c.level - 1,
+ false);
+ ret = PTR_ERR_OR_ZERO(cur);
+
+ if (mustfix_fsck_err_on(ret == -EIO, c,
+ "Unreadable btree node at btree %s level %u:\n"
+ " %s",
+ bch2_btree_ids[b->c.btree_id],
+ b->c.level - 1,
+ (bch2_bkey_val_to_text(&PBUF(buf), c, bkey_i_to_s_c(tmp.k)), buf))) {
ret = bch2_journal_key_delete(c, b->c.btree_id,
- b->c.level, cur.k->k.p);
+ b->c.level, tmp.k->k.p);
if (ret)
- return ret;
+ goto err;
+ continue;
}
- new = kmalloc(bkey_bytes(&cur.k->k), GFP_KERNEL);
- if (!new) {
- bch_err(c, "%s: error allocating new key", __func__);
- return -ENOMEM;
+ if (ret) {
+ bch_err(c, "%s: error %i getting btree node",
+ __func__, ret);
+ break;
}
- bkey_copy(new, cur.k);
+ ret = btree_repair_node_start(c, b, prev, cur);
+ if (prev)
+ six_unlock_read(&prev->c.lock);
+ prev = cur;
+ cur = NULL;
+
+ if (ret)
+ break;
+ }
+
+ if (!ret && !IS_ERR_OR_NULL(prev)) {
+ BUG_ON(cur);
+ ret = btree_repair_node_end(c, b, prev);
+ }
+
+ if (!IS_ERR_OR_NULL(prev))
+ six_unlock_read(&prev->c.lock);
+ prev = NULL;
+ if (!IS_ERR_OR_NULL(cur))
+ six_unlock_read(&cur->c.lock);
+ cur = NULL;
- if (new->k.type == KEY_TYPE_btree_ptr_v2)
- bp = bkey_i_to_btree_ptr_v2(new);
+ if (ret)
+ goto err;
+
+ bch2_btree_and_journal_iter_exit(&iter);
+ bch2_btree_and_journal_iter_init_node_iter(&iter, c, b);
+
+ while ((k = bch2_btree_and_journal_iter_peek(&iter)).k) {
+ bch2_bkey_buf_reassemble(&tmp, c, k);
+ bch2_btree_and_journal_iter_advance(&iter);
- if (update_min)
- bp->v.min_key = expected_start;
- if (update_max)
- new->k.p = node_end;
- if (bp)
- SET_BTREE_PTR_RANGE_UPDATED(&bp->v, true);
+ cur = bch2_btree_node_get_noiter(c, tmp.k,
+ b->c.btree_id, b->c.level - 1,
+ false);
+ ret = PTR_ERR_OR_ZERO(cur);
- ret = bch2_journal_key_insert(c, b->c.btree_id, b->c.level, new);
if (ret) {
- kfree(new);
- return ret;
+ bch_err(c, "%s: error %i getting btree node",
+ __func__, ret);
+ goto err;
}
- n = bch2_btree_node_get_noiter(c, cur.k, b->c.btree_id,
- b->c.level - 1, true);
- if (n) {
- mutex_lock(&c->btree_cache.lock);
- bch2_btree_node_hash_remove(&c->btree_cache, n);
-
- bkey_copy(&n->key, new);
- if (update_min)
- n->data->min_key = expected_start;
- if (update_max)
- n->data->max_key = node_end;
-
- ret = __bch2_btree_node_hash_insert(&c->btree_cache, n);
- BUG_ON(ret);
- mutex_unlock(&c->btree_cache.lock);
- six_unlock_read(&n->c.lock);
+ ret = bch2_btree_repair_topology_recurse(c, cur);
+ six_unlock_read(&cur->c.lock);
+ cur = NULL;
+
+ if (ret == DROP_THIS_NODE) {
+ ret = bch2_journal_key_delete(c, b->c.btree_id,
+ b->c.level, tmp.k->k.p);
+ dropped_children = true;
}
+
+ if (ret)
+ goto err;
+
+ have_child = true;
}
+
+ if (mustfix_fsck_err_on(!have_child, c,
+ "empty interior btree node at btree %s level %u\n"
+ " %s",
+ bch2_btree_ids[b->c.btree_id],
+ b->c.level,
+ (bch2_bkey_val_to_text(&PBUF(buf), c, bkey_i_to_s_c(&b->key)), buf)))
+ ret = DROP_THIS_NODE;
+err:
fsck_err:
+ if (!IS_ERR_OR_NULL(prev))
+ six_unlock_read(&prev->c.lock);
+ if (!IS_ERR_OR_NULL(cur))
+ six_unlock_read(&cur->c.lock);
+
+ bch2_btree_and_journal_iter_exit(&iter);
+ bch2_bkey_buf_exit(&tmp, c);
+
+ if (!ret && dropped_children)
+ goto again;
+
+ return ret;
+}
+
+static int bch2_repair_topology(struct bch_fs *c)
+{
+ struct btree *b;
+ unsigned i;
+ int ret = 0;
+
+ for (i = 0; i < BTREE_ID_NR && !ret; i++) {
+ b = c->btree_roots[i].b;
+ if (btree_node_fake(b))
+ continue;
+
+ six_lock_read(&b->c.lock, NULL, NULL);
+ ret = bch2_btree_repair_topology_recurse(c, b);
+ six_unlock_read(&b->c.lock);
+
+ if (ret == DROP_THIS_NODE) {
+ bch_err(c, "empty btree root - repair unimplemented");
+ ret = FSCK_ERR_EXIT;
+ }
+ }
+
return ret;
}
struct bkey_s_c k;
struct bkey_buf cur, prev;
u8 max_stale = 0;
+ char buf[200];
int ret = 0;
bch2_btree_and_journal_iter_init_node_iter(&iter, c, b);
&k, &max_stale, true);
if (ret) {
bch_err(c, "%s: error %i from bch2_gc_mark_key", __func__, ret);
- break;
+ goto fsck_err;
}
if (b->c.level) {
&prev, cur,
!bch2_btree_and_journal_iter_peek(&iter).k);
if (ret)
- break;
+ goto fsck_err;
} else {
bch2_btree_and_journal_iter_advance(&iter);
}
false);
ret = PTR_ERR_OR_ZERO(child);
- if (fsck_err_on(ret == -EIO, c,
- "unreadable btree node")) {
- ret = bch2_journal_key_delete(c, b->c.btree_id,
- b->c.level, cur.k->k.p);
- if (ret)
- return ret;
-
- set_bit(BCH_FS_NEED_ANOTHER_GC, &c->flags);
- continue;
- }
-
- if (ret) {
+ if (ret == -EIO) {
+ bch2_topology_error(c);
+
+ if (fsck_err(c, "Unreadable btree node at btree %s level %u:\n"
+ " %s",
+ bch2_btree_ids[b->c.btree_id],
+ b->c.level - 1,
+ (bch2_bkey_val_to_text(&PBUF(buf), c, bkey_i_to_s_c(cur.k)), buf))) {
+ ret = FSCK_ERR_START_TOPOLOGY_REPAIR;
+ bch_info(c, "Halting mark and sweep to start topology repair pass");
+ goto fsck_err;
+ } else {
+ /* Continue marking when opted to not
+ * fix the error: */
+ ret = 0;
+ set_bit(BCH_FS_INITIAL_GC_UNFIXED, &c->flags);
+ continue;
+ }
+ } else if (ret) {
bch_err(c, "%s: error %i getting btree node",
__func__, ret);
break;
return 0;
six_lock_read(&b->c.lock, NULL, NULL);
- if (fsck_err_on(bpos_cmp(b->data->min_key, POS_MIN), c,
+ if (mustfix_fsck_err_on(bpos_cmp(b->data->min_key, POS_MIN), c,
"btree root with incorrect min_key: %s",
(bch2_bpos_to_text(&PBUF(buf), b->data->min_key), buf))) {
- BUG();
+ bch_err(c, "repair unimplemented");
+ ret = FSCK_ERR_EXIT;
+ goto fsck_err;
}
- if (fsck_err_on(bpos_cmp(b->data->max_key, POS_MAX), c,
+ if (mustfix_fsck_err_on(bpos_cmp(b->data->max_key, POS_MAX), c,
"btree root with incorrect max_key: %s",
(bch2_bpos_to_text(&PBUF(buf), b->data->max_key), buf))) {
- BUG();
+ bch_err(c, "repair unimplemented");
+ ret = FSCK_ERR_EXIT;
+ goto fsck_err;
}
if (b->c.level >= target_depth)
fsck_err:
six_unlock_read(&b->c.lock);
- if (ret)
+ if (ret < 0)
bch_err(c, "%s: ret %i", __func__, ret);
return ret;
}
{
enum btree_id ids[BTREE_ID_NR];
unsigned i;
+ int ret = 0;
for (i = 0; i < BTREE_ID_NR; i++)
ids[i] = i;
bubble_sort(ids, BTREE_ID_NR, btree_id_gc_phase_cmp);
- for (i = 0; i < BTREE_ID_NR; i++) {
- enum btree_id id = ids[i];
- int ret = initial
- ? bch2_gc_btree_init(c, id, metadata_only)
- : bch2_gc_btree(c, id, initial, metadata_only);
- if (ret) {
- bch_err(c, "%s: ret %i", __func__, ret);
- return ret;
- }
- }
+ for (i = 0; i < BTREE_ID_NR && !ret; i++)
+ ret = initial
+ ? bch2_gc_btree_init(c, ids[i], metadata_only)
+ : bch2_gc_btree(c, ids[i], initial, metadata_only);
- return 0;
+ if (ret < 0)
+ bch_err(c, "%s: ret %i", __func__, ret);
+ return ret;
}
static void mark_metadata_sectors(struct bch_fs *c, struct bch_dev *ca,
bch2_mark_superblocks(c);
+ if (test_bit(BCH_FS_TOPOLOGY_ERROR, &c->flags) &&
+ !test_bit(BCH_FS_INITIAL_GC_DONE, &c->flags) &&
+ c->opts.fix_errors != FSCK_OPT_NO) {
+ bch_info(c, "starting topology repair pass");
+ ret = bch2_repair_topology(c);
+ if (ret)
+ goto out;
+ bch_info(c, "topology repair pass done");
+ }
+
ret = bch2_gc_btrees(c, initial, metadata_only);
+
+ if (ret == FSCK_ERR_START_TOPOLOGY_REPAIR &&
+ !test_bit(BCH_FS_INITIAL_GC_DONE, &c->flags)) {
+ set_bit(BCH_FS_NEED_ANOTHER_GC, &c->flags);
+ ret = 0;
+ }
+
+ if (ret == FSCK_ERR_START_TOPOLOGY_REPAIR)
+ ret = FSCK_ERR_EXIT;
+
if (ret)
goto out;
projects / linux-2.6-block.git / commitdiff