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-rw-r--r--fs/bcachefs/recovery.c1012
1 files changed, 1012 insertions, 0 deletions
diff --git a/fs/bcachefs/recovery.c b/fs/bcachefs/recovery.c
new file mode 100644
index 000000000000..e0df2c0a4fdf
--- /dev/null
+++ b/fs/bcachefs/recovery.c
@@ -0,0 +1,1012 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "bcachefs.h"
+#include "alloc_background.h"
+#include "btree_gc.h"
+#include "btree_update.h"
+#include "btree_update_interior.h"
+#include "btree_io.h"
+#include "buckets.h"
+#include "dirent.h"
+#include "ec.h"
+#include "error.h"
+#include "fsck.h"
+#include "journal_io.h"
+#include "journal_reclaim.h"
+#include "journal_seq_blacklist.h"
+#include "quota.h"
+#include "recovery.h"
+#include "replicas.h"
+#include "super-io.h"
+
+#include <linux/sort.h>
+#include <linux/stat.h>
+
+#define QSTR(n) { { { .len = strlen(n) } }, .name = n }
+
+/* sort and dedup all keys in the journal: */
+
+static void journal_entries_free(struct list_head *list)
+{
+
+ while (!list_empty(list)) {
+ struct journal_replay *i =
+ list_first_entry(list, struct journal_replay, list);
+ list_del(&i->list);
+ kvpfree(i, offsetof(struct journal_replay, j) +
+ vstruct_bytes(&i->j));
+ }
+}
+
+static int journal_sort_key_cmp(const void *_l, const void *_r)
+{
+ const struct journal_key *l = _l;
+ const struct journal_key *r = _r;
+
+ return cmp_int(l->btree_id, r->btree_id) ?:
+ bkey_cmp(l->pos, r->pos) ?:
+ cmp_int(l->journal_seq, r->journal_seq) ?:
+ cmp_int(l->journal_offset, r->journal_offset);
+}
+
+static int journal_sort_seq_cmp(const void *_l, const void *_r)
+{
+ const struct journal_key *l = _l;
+ const struct journal_key *r = _r;
+
+ return cmp_int(l->journal_seq, r->journal_seq) ?:
+ cmp_int(l->btree_id, r->btree_id) ?:
+ bkey_cmp(l->pos, r->pos);
+}
+
+static void journal_keys_sift(struct journal_keys *keys, struct journal_key *i)
+{
+ while (i + 1 < keys->d + keys->nr &&
+ journal_sort_key_cmp(i, i + 1) > 0) {
+ swap(i[0], i[1]);
+ i++;
+ }
+}
+
+static void journal_keys_free(struct journal_keys *keys)
+{
+ struct journal_key *i;
+
+ for_each_journal_key(*keys, i)
+ if (i->allocated)
+ kfree(i->k);
+ kvfree(keys->d);
+ keys->d = NULL;
+ keys->nr = 0;
+}
+
+static struct journal_keys journal_keys_sort(struct list_head *journal_entries)
+{
+ struct journal_replay *p;
+ struct jset_entry *entry;
+ struct bkey_i *k, *_n;
+ struct journal_keys keys = { NULL }, keys_deduped = { NULL };
+ struct journal_key *i;
+ size_t nr_keys = 0;
+
+ list_for_each_entry(p, journal_entries, list)
+ for_each_jset_key(k, _n, entry, &p->j)
+ nr_keys++;
+
+ keys.journal_seq_base = keys_deduped.journal_seq_base =
+ le64_to_cpu(list_first_entry(journal_entries,
+ struct journal_replay,
+ list)->j.seq);
+
+ keys.d = kvmalloc(sizeof(keys.d[0]) * nr_keys, GFP_KERNEL);
+ if (!keys.d)
+ goto err;
+
+ keys_deduped.d = kvmalloc(sizeof(keys.d[0]) * nr_keys * 2, GFP_KERNEL);
+ if (!keys_deduped.d)
+ goto err;
+
+ list_for_each_entry(p, journal_entries, list)
+ for_each_jset_key(k, _n, entry, &p->j)
+ keys.d[keys.nr++] = (struct journal_key) {
+ .btree_id = entry->btree_id,
+ .pos = bkey_start_pos(&k->k),
+ .k = k,
+ .journal_seq = le64_to_cpu(p->j.seq) -
+ keys.journal_seq_base,
+ .journal_offset = k->_data - p->j._data,
+ };
+
+ sort(keys.d, nr_keys, sizeof(keys.d[0]), journal_sort_key_cmp, NULL);
+
+ i = keys.d;
+ while (i < keys.d + keys.nr) {
+ if (i + 1 < keys.d + keys.nr &&
+ i[0].btree_id == i[1].btree_id &&
+ !bkey_cmp(i[0].pos, i[1].pos)) {
+ if (bkey_cmp(i[0].k->k.p, i[1].k->k.p) <= 0) {
+ i++;
+ } else {
+ bch2_cut_front(i[1].k->k.p, i[0].k);
+ i[0].pos = i[1].k->k.p;
+ journal_keys_sift(&keys, i);
+ }
+ continue;
+ }
+
+ if (i + 1 < keys.d + keys.nr &&
+ i[0].btree_id == i[1].btree_id &&
+ bkey_cmp(i[0].k->k.p, bkey_start_pos(&i[1].k->k)) > 0) {
+ if ((cmp_int(i[0].journal_seq, i[1].journal_seq) ?:
+ cmp_int(i[0].journal_offset, i[1].journal_offset)) < 0) {
+ if (bkey_cmp(i[0].k->k.p, i[1].k->k.p) <= 0) {
+ bch2_cut_back(bkey_start_pos(&i[1].k->k), &i[0].k->k);
+ } else {
+ struct bkey_i *split =
+ kmalloc(bkey_bytes(i[0].k), GFP_KERNEL);
+
+ if (!split)
+ goto err;
+
+ bkey_copy(split, i[0].k);
+ bch2_cut_back(bkey_start_pos(&i[1].k->k), &split->k);
+ keys_deduped.d[keys_deduped.nr++] = (struct journal_key) {
+ .btree_id = i[0].btree_id,
+ .allocated = true,
+ .pos = bkey_start_pos(&split->k),
+ .k = split,
+ .journal_seq = i[0].journal_seq,
+ .journal_offset = i[0].journal_offset,
+ };
+
+ bch2_cut_front(i[1].k->k.p, i[0].k);
+ i[0].pos = i[1].k->k.p;
+ journal_keys_sift(&keys, i);
+ continue;
+ }
+ } else {
+ if (bkey_cmp(i[0].k->k.p, i[1].k->k.p) >= 0) {
+ i[1] = i[0];
+ i++;
+ continue;
+ } else {
+ bch2_cut_front(i[0].k->k.p, i[1].k);
+ i[1].pos = i[0].k->k.p;
+ journal_keys_sift(&keys, i + 1);
+ continue;
+ }
+ }
+ }
+
+ keys_deduped.d[keys_deduped.nr++] = *i++;
+ }
+
+ kvfree(keys.d);
+ return keys_deduped;
+err:
+ journal_keys_free(&keys_deduped);
+ kvfree(keys.d);
+ return (struct journal_keys) { NULL };
+}
+
+/* journal replay: */
+
+static void replay_now_at(struct journal *j, u64 seq)
+{
+ BUG_ON(seq < j->replay_journal_seq);
+ BUG_ON(seq > j->replay_journal_seq_end);
+
+ while (j->replay_journal_seq < seq)
+ bch2_journal_pin_put(j, j->replay_journal_seq++);
+}
+
+static int bch2_extent_replay_key(struct bch_fs *c, struct bkey_i *k)
+{
+ struct btree_trans trans;
+ struct btree_iter *iter, *split_iter;
+ /*
+ * We might cause compressed extents to be split, so we need to pass in
+ * a disk_reservation:
+ */
+ struct disk_reservation disk_res =
+ bch2_disk_reservation_init(c, 0);
+ struct bkey_i *split;
+ bool split_compressed = false;
+ int ret;
+
+ bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
+retry:
+ bch2_trans_begin(&trans);
+
+ iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
+ bkey_start_pos(&k->k),
+ BTREE_ITER_INTENT);
+
+ do {
+ ret = bch2_btree_iter_traverse(iter);
+ if (ret)
+ goto err;
+
+ split_iter = bch2_trans_copy_iter(&trans, iter);
+ ret = PTR_ERR_OR_ZERO(split_iter);
+ if (ret)
+ goto err;
+
+ split = bch2_trans_kmalloc(&trans, bkey_bytes(&k->k));
+ ret = PTR_ERR_OR_ZERO(split);
+ if (ret)
+ goto err;
+
+ if (!split_compressed &&
+ bch2_extent_is_compressed(bkey_i_to_s_c(k)) &&
+ !bch2_extent_is_atomic(k, split_iter)) {
+ ret = bch2_disk_reservation_add(c, &disk_res,
+ k->k.size *
+ bch2_bkey_nr_dirty_ptrs(bkey_i_to_s_c(k)),
+ BCH_DISK_RESERVATION_NOFAIL);
+ BUG_ON(ret);
+
+ split_compressed = true;
+ }
+
+ bkey_copy(split, k);
+ bch2_cut_front(split_iter->pos, split);
+ bch2_extent_trim_atomic(split, split_iter);
+
+ bch2_trans_update(&trans, BTREE_INSERT_ENTRY(split_iter, split));
+ bch2_btree_iter_set_pos(iter, split->k.p);
+ } while (bkey_cmp(iter->pos, k->k.p) < 0);
+
+ if (split_compressed) {
+ ret = bch2_trans_mark_key(&trans, bkey_i_to_s_c(k),
+ -((s64) k->k.size),
+ BCH_BUCKET_MARK_OVERWRITE) ?:
+ bch2_trans_commit(&trans, &disk_res, NULL,
+ BTREE_INSERT_ATOMIC|
+ BTREE_INSERT_NOFAIL|
+ BTREE_INSERT_LAZY_RW|
+ BTREE_INSERT_NOMARK_OVERWRITES|
+ BTREE_INSERT_NO_CLEAR_REPLICAS);
+ } else {
+ ret = bch2_trans_commit(&trans, &disk_res, NULL,
+ BTREE_INSERT_ATOMIC|
+ BTREE_INSERT_NOFAIL|
+ BTREE_INSERT_LAZY_RW|
+ BTREE_INSERT_JOURNAL_REPLAY|
+ BTREE_INSERT_NOMARK);
+ }
+
+ if (ret)
+ goto err;
+err:
+ if (ret == -EINTR)
+ goto retry;
+
+ bch2_disk_reservation_put(c, &disk_res);
+
+ return bch2_trans_exit(&trans) ?: ret;
+}
+
+static int bch2_journal_replay(struct bch_fs *c,
+ struct journal_keys keys)
+{
+ struct journal *j = &c->journal;
+ struct journal_key *i;
+ int ret;
+
+ sort(keys.d, keys.nr, sizeof(keys.d[0]), journal_sort_seq_cmp, NULL);
+
+ for_each_journal_key(keys, i) {
+ replay_now_at(j, keys.journal_seq_base + i->journal_seq);
+
+ switch (i->btree_id) {
+ case BTREE_ID_ALLOC:
+ ret = bch2_alloc_replay_key(c, i->k);
+ break;
+ case BTREE_ID_EXTENTS:
+ ret = bch2_extent_replay_key(c, i->k);
+ break;
+ default:
+ ret = bch2_btree_insert(c, i->btree_id, i->k,
+ NULL, NULL,
+ BTREE_INSERT_NOFAIL|
+ BTREE_INSERT_LAZY_RW|
+ BTREE_INSERT_JOURNAL_REPLAY|
+ BTREE_INSERT_NOMARK);
+ break;
+ }
+
+ if (ret) {
+ bch_err(c, "journal replay: error %d while replaying key",
+ ret);
+ return ret;
+ }
+
+ cond_resched();
+ }
+
+ replay_now_at(j, j->replay_journal_seq_end);
+ j->replay_journal_seq = 0;
+
+ bch2_journal_set_replay_done(j);
+ bch2_journal_flush_all_pins(j);
+ return bch2_journal_error(j);
+}
+
+static bool journal_empty(struct list_head *journal)
+{
+ return list_empty(journal) ||
+ journal_entry_empty(&list_last_entry(journal,
+ struct journal_replay, list)->j);
+}
+
+static int
+verify_journal_entries_not_blacklisted_or_missing(struct bch_fs *c,
+ struct list_head *journal)
+{
+ struct journal_replay *i =
+ list_last_entry(journal, struct journal_replay, list);
+ u64 start_seq = le64_to_cpu(i->j.last_seq);
+ u64 end_seq = le64_to_cpu(i->j.seq);
+ u64 seq = start_seq;
+ int ret = 0;
+
+ list_for_each_entry(i, journal, list) {
+ fsck_err_on(seq != le64_to_cpu(i->j.seq), c,
+ "journal entries %llu-%llu missing! (replaying %llu-%llu)",
+ seq, le64_to_cpu(i->j.seq) - 1,
+ start_seq, end_seq);
+
+ seq = le64_to_cpu(i->j.seq);
+
+ fsck_err_on(bch2_journal_seq_is_blacklisted(c, seq, false), c,
+ "found blacklisted journal entry %llu", seq);
+
+ do {
+ seq++;
+ } while (bch2_journal_seq_is_blacklisted(c, seq, false));
+ }
+fsck_err:
+ return ret;
+}
+
+/* journal replay early: */
+
+static int journal_replay_entry_early(struct bch_fs *c,
+ struct jset_entry *entry)
+{
+ int ret = 0;
+
+ switch (entry->type) {
+ case BCH_JSET_ENTRY_btree_root: {
+ struct btree_root *r;
+
+ if (entry->btree_id >= BTREE_ID_NR) {
+ bch_err(c, "filesystem has unknown btree type %u",
+ entry->btree_id);
+ return -EINVAL;
+ }
+
+ r = &c->btree_roots[entry->btree_id];
+
+ if (entry->u64s) {
+ r->level = entry->level;
+ bkey_copy(&r->key, &entry->start[0]);
+ r->error = 0;
+ } else {
+ r->error = -EIO;
+ }
+ r->alive = true;
+ break;
+ }
+ case BCH_JSET_ENTRY_usage: {
+ struct jset_entry_usage *u =
+ container_of(entry, struct jset_entry_usage, entry);
+
+ switch (entry->btree_id) {
+ case FS_USAGE_RESERVED:
+ if (entry->level < BCH_REPLICAS_MAX)
+ c->usage_base->persistent_reserved[entry->level] =
+ le64_to_cpu(u->v);
+ break;
+ case FS_USAGE_INODES:
+ c->usage_base->nr_inodes = le64_to_cpu(u->v);
+ break;
+ case FS_USAGE_KEY_VERSION:
+ atomic64_set(&c->key_version,
+ le64_to_cpu(u->v));
+ break;
+ }
+
+ break;
+ }
+ case BCH_JSET_ENTRY_data_usage: {
+ struct jset_entry_data_usage *u =
+ container_of(entry, struct jset_entry_data_usage, entry);
+ ret = bch2_replicas_set_usage(c, &u->r,
+ le64_to_cpu(u->v));
+ break;
+ }
+ case BCH_JSET_ENTRY_blacklist: {
+ struct jset_entry_blacklist *bl_entry =
+ container_of(entry, struct jset_entry_blacklist, entry);
+
+ ret = bch2_journal_seq_blacklist_add(c,
+ le64_to_cpu(bl_entry->seq),
+ le64_to_cpu(bl_entry->seq) + 1);
+ break;
+ }
+ case BCH_JSET_ENTRY_blacklist_v2: {
+ struct jset_entry_blacklist_v2 *bl_entry =
+ container_of(entry, struct jset_entry_blacklist_v2, entry);
+
+ ret = bch2_journal_seq_blacklist_add(c,
+ le64_to_cpu(bl_entry->start),
+ le64_to_cpu(bl_entry->end) + 1);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int journal_replay_early(struct bch_fs *c,
+ struct bch_sb_field_clean *clean,
+ struct list_head *journal)
+{
+ struct jset_entry *entry;
+ int ret;
+
+ if (clean) {
+ c->bucket_clock[READ].hand = le16_to_cpu(clean->read_clock);
+ c->bucket_clock[WRITE].hand = le16_to_cpu(clean->write_clock);
+
+ for (entry = clean->start;
+ entry != vstruct_end(&clean->field);
+ entry = vstruct_next(entry)) {
+ ret = journal_replay_entry_early(c, entry);
+ if (ret)
+ return ret;
+ }
+ } else {
+ struct journal_replay *i =
+ list_last_entry(journal, struct journal_replay, list);
+
+ c->bucket_clock[READ].hand = le16_to_cpu(i->j.read_clock);
+ c->bucket_clock[WRITE].hand = le16_to_cpu(i->j.write_clock);
+
+ list_for_each_entry(i, journal, list)
+ vstruct_for_each(&i->j, entry) {
+ ret = journal_replay_entry_early(c, entry);
+ if (ret)
+ return ret;
+ }
+ }
+
+ bch2_fs_usage_initialize(c);
+
+ return 0;
+}
+
+/* sb clean section: */
+
+static struct bkey_i *btree_root_find(struct bch_fs *c,
+ struct bch_sb_field_clean *clean,
+ struct jset *j,
+ enum btree_id id, unsigned *level)
+{
+ struct bkey_i *k;
+ struct jset_entry *entry, *start, *end;
+
+ if (clean) {
+ start = clean->start;
+ end = vstruct_end(&clean->field);
+ } else {
+ start = j->start;
+ end = vstruct_last(j);
+ }
+
+ for (entry = start; entry < end; entry = vstruct_next(entry))
+ if (entry->type == BCH_JSET_ENTRY_btree_root &&
+ entry->btree_id == id)
+ goto found;
+
+ return NULL;
+found:
+ if (!entry->u64s)
+ return ERR_PTR(-EINVAL);
+
+ k = entry->start;
+ *level = entry->level;
+ return k;
+}
+
+static int verify_superblock_clean(struct bch_fs *c,
+ struct bch_sb_field_clean **cleanp,
+ struct jset *j)
+{
+ unsigned i;
+ struct bch_sb_field_clean *clean = *cleanp;
+ int ret = 0;
+
+ if (!c->sb.clean || !j)
+ return 0;
+
+ if (mustfix_fsck_err_on(j->seq != clean->journal_seq, c,
+ "superblock journal seq (%llu) doesn't match journal (%llu) after clean shutdown",
+ le64_to_cpu(clean->journal_seq),
+ le64_to_cpu(j->seq))) {
+ kfree(clean);
+ *cleanp = NULL;
+ return 0;
+ }
+
+ mustfix_fsck_err_on(j->read_clock != clean->read_clock, c,
+ "superblock read clock doesn't match journal after clean shutdown");
+ mustfix_fsck_err_on(j->write_clock != clean->write_clock, c,
+ "superblock read clock doesn't match journal after clean shutdown");
+
+ for (i = 0; i < BTREE_ID_NR; i++) {
+ struct bkey_i *k1, *k2;
+ unsigned l1 = 0, l2 = 0;
+
+ k1 = btree_root_find(c, clean, NULL, i, &l1);
+ k2 = btree_root_find(c, NULL, j, i, &l2);
+
+ if (!k1 && !k2)
+ continue;
+
+ mustfix_fsck_err_on(!k1 || !k2 ||
+ IS_ERR(k1) ||
+ IS_ERR(k2) ||
+ k1->k.u64s != k2->k.u64s ||
+ memcmp(k1, k2, bkey_bytes(k1)) ||
+ l1 != l2, c,
+ "superblock btree root doesn't match journal after clean shutdown");
+ }
+fsck_err:
+ return ret;
+}
+
+static struct bch_sb_field_clean *read_superblock_clean(struct bch_fs *c)
+{
+ struct bch_sb_field_clean *clean, *sb_clean;
+ int ret;
+
+ mutex_lock(&c->sb_lock);
+ sb_clean = bch2_sb_get_clean(c->disk_sb.sb);
+
+ if (fsck_err_on(!sb_clean, c,
+ "superblock marked clean but clean section not present")) {
+ SET_BCH_SB_CLEAN(c->disk_sb.sb, false);
+ c->sb.clean = false;
+ mutex_unlock(&c->sb_lock);
+ return NULL;
+ }
+
+ clean = kmemdup(sb_clean, vstruct_bytes(&sb_clean->field),
+ GFP_KERNEL);
+ if (!clean) {
+ mutex_unlock(&c->sb_lock);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ if (le16_to_cpu(c->disk_sb.sb->version) <
+ bcachefs_metadata_version_bkey_renumber)
+ bch2_sb_clean_renumber(clean, READ);
+
+ mutex_unlock(&c->sb_lock);
+
+ return clean;
+fsck_err:
+ mutex_unlock(&c->sb_lock);
+ return ERR_PTR(ret);
+}
+
+static int read_btree_roots(struct bch_fs *c)
+{
+ unsigned i;
+ int ret = 0;
+
+ for (i = 0; i < BTREE_ID_NR; i++) {
+ struct btree_root *r = &c->btree_roots[i];
+
+ if (!r->alive)
+ continue;
+
+ if (i == BTREE_ID_ALLOC &&
+ test_reconstruct_alloc(c)) {
+ c->sb.compat &= ~(1ULL << BCH_COMPAT_FEAT_ALLOC_INFO);
+ continue;
+ }
+
+
+ if (r->error) {
+ __fsck_err(c, i == BTREE_ID_ALLOC
+ ? FSCK_CAN_IGNORE : 0,
+ "invalid btree root %s",
+ bch2_btree_ids[i]);
+ if (i == BTREE_ID_ALLOC)
+ c->sb.compat &= ~(1ULL << BCH_COMPAT_FEAT_ALLOC_INFO);
+ }
+
+ ret = bch2_btree_root_read(c, i, &r->key, r->level);
+ if (ret) {
+ __fsck_err(c, i == BTREE_ID_ALLOC
+ ? FSCK_CAN_IGNORE : 0,
+ "error reading btree root %s",
+ bch2_btree_ids[i]);
+ if (i == BTREE_ID_ALLOC)
+ c->sb.compat &= ~(1ULL << BCH_COMPAT_FEAT_ALLOC_INFO);
+ }
+ }
+
+ for (i = 0; i < BTREE_ID_NR; i++)
+ if (!c->btree_roots[i].b)
+ bch2_btree_root_alloc(c, i);
+fsck_err:
+ return ret;
+}
+
+int bch2_fs_recovery(struct bch_fs *c)
+{
+ const char *err = "cannot allocate memory";
+ struct bch_sb_field_clean *clean = NULL;
+ u64 journal_seq;
+ LIST_HEAD(journal_entries);
+ struct journal_keys journal_keys = { NULL };
+ bool wrote = false, write_sb = false;
+ int ret;
+
+ if (c->sb.clean)
+ clean = read_superblock_clean(c);
+ ret = PTR_ERR_OR_ZERO(clean);
+ if (ret)
+ goto err;
+
+ if (c->sb.clean)
+ bch_info(c, "recovering from clean shutdown, journal seq %llu",
+ le64_to_cpu(clean->journal_seq));
+
+ if (!c->replicas.entries) {
+ bch_info(c, "building replicas info");
+ set_bit(BCH_FS_REBUILD_REPLICAS, &c->flags);
+ }
+
+ if (!c->sb.clean || c->opts.fsck) {
+ struct jset *j;
+
+ ret = bch2_journal_read(c, &journal_entries);
+ if (ret)
+ goto err;
+
+ if (mustfix_fsck_err_on(c->sb.clean && !journal_empty(&journal_entries), c,
+ "filesystem marked clean but journal not empty")) {
+ c->sb.compat &= ~(1ULL << BCH_COMPAT_FEAT_ALLOC_INFO);
+ SET_BCH_SB_CLEAN(c->disk_sb.sb, false);
+ c->sb.clean = false;
+ }
+
+ if (!c->sb.clean && list_empty(&journal_entries)) {
+ bch_err(c, "no journal entries found");
+ ret = BCH_FSCK_REPAIR_IMPOSSIBLE;
+ goto err;
+ }
+
+ journal_keys = journal_keys_sort(&journal_entries);
+ if (!journal_keys.d) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ j = &list_last_entry(&journal_entries,
+ struct journal_replay, list)->j;
+
+ ret = verify_superblock_clean(c, &clean, j);
+ if (ret)
+ goto err;
+
+ journal_seq = le64_to_cpu(j->seq) + 1;
+ } else {
+ journal_seq = le64_to_cpu(clean->journal_seq) + 1;
+ }
+
+ ret = journal_replay_early(c, clean, &journal_entries);
+ if (ret)
+ goto err;
+
+ if (!c->sb.clean) {
+ ret = bch2_journal_seq_blacklist_add(c,
+ journal_seq,
+ journal_seq + 4);
+ if (ret) {
+ bch_err(c, "error creating new journal seq blacklist entry");
+ goto err;
+ }
+
+ journal_seq += 4;
+ }
+
+ ret = bch2_blacklist_table_initialize(c);
+
+ if (!list_empty(&journal_entries)) {
+ ret = verify_journal_entries_not_blacklisted_or_missing(c,
+ &journal_entries);
+ if (ret)
+ goto err;
+ }
+
+ ret = bch2_fs_journal_start(&c->journal, journal_seq,
+ &journal_entries);
+ if (ret)
+ goto err;
+
+ ret = read_btree_roots(c);
+ if (ret)
+ goto err;
+
+ bch_verbose(c, "starting alloc read");
+ err = "error reading allocation information";
+ ret = bch2_alloc_read(c, &journal_keys);
+ if (ret)
+ goto err;
+ bch_verbose(c, "alloc read done");
+
+ bch_verbose(c, "starting stripes_read");
+ err = "error reading stripes";
+ ret = bch2_stripes_read(c, &journal_keys);
+ if (ret)
+ goto err;
+ bch_verbose(c, "stripes_read done");
+
+ set_bit(BCH_FS_ALLOC_READ_DONE, &c->flags);
+
+ if ((c->sb.compat & (1ULL << BCH_COMPAT_FEAT_ALLOC_INFO)) &&
+ !(c->sb.compat & (1ULL << BCH_COMPAT_FEAT_ALLOC_METADATA))) {
+ /*
+ * interior btree node updates aren't consistent with the
+ * journal; after an unclean shutdown we have to walk all
+ * pointers to metadata:
+ */
+ bch_info(c, "starting metadata mark and sweep");
+ err = "error in mark and sweep";
+ ret = bch2_gc(c, NULL, true, true);
+ if (ret)
+ goto err;
+ bch_verbose(c, "mark and sweep done");
+ }
+
+ if (c->opts.fsck ||
+ !(c->sb.compat & (1ULL << BCH_COMPAT_FEAT_ALLOC_INFO)) ||
+ test_bit(BCH_FS_REBUILD_REPLICAS, &c->flags)) {
+ bch_info(c, "starting mark and sweep");
+ err = "error in mark and sweep";
+ ret = bch2_gc(c, &journal_keys, true, false);
+ if (ret)
+ goto err;
+ bch_verbose(c, "mark and sweep done");
+ }
+
+ clear_bit(BCH_FS_REBUILD_REPLICAS, &c->flags);
+ set_bit(BCH_FS_INITIAL_GC_DONE, &c->flags);
+
+ /*
+ * Skip past versions that might have possibly been used (as nonces),
+ * but hadn't had their pointers written:
+ */
+ if (c->sb.encryption_type && !c->sb.clean)
+ atomic64_add(1 << 16, &c->key_version);
+
+ if (c->opts.norecovery)
+ goto out;
+
+ bch_verbose(c, "starting journal replay");
+ err = "journal replay failed";
+ ret = bch2_journal_replay(c, journal_keys);
+ if (ret)
+ goto err;
+ bch_verbose(c, "journal replay done");
+
+ if (!c->opts.nochanges) {
+ /*
+ * note that even when filesystem was clean there might be work
+ * to do here, if we ran gc (because of fsck) which recalculated
+ * oldest_gen:
+ */
+ bch_verbose(c, "writing allocation info");
+ err = "error writing out alloc info";
+ ret = bch2_stripes_write(c, BTREE_INSERT_LAZY_RW, &wrote) ?:
+ bch2_alloc_write(c, BTREE_INSERT_LAZY_RW, &wrote);
+ if (ret) {
+ bch_err(c, "error writing alloc info");
+ goto err;
+ }
+ bch_verbose(c, "alloc write done");
+ }
+
+ if (!c->sb.clean) {
+ if (!(c->sb.features & (1 << BCH_FEATURE_ATOMIC_NLINK))) {
+ bch_info(c, "checking inode link counts");
+ err = "error in recovery";
+ ret = bch2_fsck_inode_nlink(c);
+ if (ret)
+ goto err;
+ bch_verbose(c, "check inodes done");
+
+ } else {
+ bch_verbose(c, "checking for deleted inodes");
+ err = "error in recovery";
+ ret = bch2_fsck_walk_inodes_only(c);
+ if (ret)
+ goto err;
+ bch_verbose(c, "check inodes done");
+ }
+ }
+
+ if (c->opts.fsck) {
+ bch_info(c, "starting fsck");
+ err = "error in fsck";
+ ret = bch2_fsck_full(c);
+ if (ret)
+ goto err;
+ bch_verbose(c, "fsck done");
+ }
+
+ if (enabled_qtypes(c)) {
+ bch_verbose(c, "reading quotas");
+ ret = bch2_fs_quota_read(c);
+ if (ret)
+ goto err;
+ bch_verbose(c, "quotas done");
+ }
+
+ mutex_lock(&c->sb_lock);
+ if (c->opts.version_upgrade) {
+ if (c->sb.version < bcachefs_metadata_version_new_versioning)
+ c->disk_sb.sb->version_min =
+ le16_to_cpu(bcachefs_metadata_version_min);
+ c->disk_sb.sb->version = le16_to_cpu(bcachefs_metadata_version_current);
+ write_sb = true;
+ }
+
+ if (!test_bit(BCH_FS_ERROR, &c->flags)) {
+ c->disk_sb.sb->compat[0] |= 1ULL << BCH_COMPAT_FEAT_ALLOC_INFO;
+ write_sb = true;
+ }
+
+ if (c->opts.fsck &&
+ !test_bit(BCH_FS_ERROR, &c->flags)) {
+ c->disk_sb.sb->features[0] |= 1ULL << BCH_FEATURE_ATOMIC_NLINK;
+ SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 0);
+ write_sb = true;
+ }
+
+ if (write_sb)
+ bch2_write_super(c);
+ mutex_unlock(&c->sb_lock);
+
+ if (c->journal_seq_blacklist_table &&
+ c->journal_seq_blacklist_table->nr > 128)
+ queue_work(system_long_wq, &c->journal_seq_blacklist_gc_work);
+out:
+ ret = 0;
+err:
+fsck_err:
+ bch2_flush_fsck_errs(c);
+ journal_keys_free(&journal_keys);
+ journal_entries_free(&journal_entries);
+ kfree(clean);
+ if (ret)
+ bch_err(c, "Error in recovery: %s (%i)", err, ret);
+ else
+ bch_verbose(c, "ret %i", ret);
+ return ret;
+}
+
+int bch2_fs_initialize(struct bch_fs *c)
+{
+ struct bch_inode_unpacked root_inode, lostfound_inode;
+ struct bkey_inode_buf packed_inode;
+ struct bch_hash_info root_hash_info;
+ struct qstr lostfound = QSTR("lost+found");
+ const char *err = "cannot allocate memory";
+ struct bch_dev *ca;
+ LIST_HEAD(journal);
+ unsigned i;
+ int ret;
+
+ bch_notice(c, "initializing new filesystem");
+
+ mutex_lock(&c->sb_lock);
+ for_each_online_member(ca, c, i)
+ bch2_mark_dev_superblock(c, ca, 0);
+ mutex_unlock(&c->sb_lock);
+
+ set_bit(BCH_FS_ALLOC_READ_DONE, &c->flags);
+ set_bit(BCH_FS_INITIAL_GC_DONE, &c->flags);
+
+ for (i = 0; i < BTREE_ID_NR; i++)
+ bch2_btree_root_alloc(c, i);
+
+ err = "unable to allocate journal buckets";
+ for_each_online_member(ca, c, i) {
+ ret = bch2_dev_journal_alloc(ca);
+ if (ret) {
+ percpu_ref_put(&ca->io_ref);
+ goto err;
+ }
+ }
+
+ /*
+ * journal_res_get() will crash if called before this has
+ * set up the journal.pin FIFO and journal.cur pointer:
+ */
+ bch2_fs_journal_start(&c->journal, 1, &journal);
+ bch2_journal_set_replay_done(&c->journal);
+
+ err = "error going read write";
+ ret = __bch2_fs_read_write(c, true);
+ if (ret)
+ goto err;
+
+ bch2_inode_init(c, &root_inode, 0, 0,
+ S_IFDIR|S_IRWXU|S_IRUGO|S_IXUGO, 0, NULL);
+ root_inode.bi_inum = BCACHEFS_ROOT_INO;
+ root_inode.bi_nlink++; /* lost+found */
+ bch2_inode_pack(&packed_inode, &root_inode);
+
+ err = "error creating root directory";
+ ret = bch2_btree_insert(c, BTREE_ID_INODES,
+ &packed_inode.inode.k_i,
+ NULL, NULL, 0);
+ if (ret)
+ goto err;
+
+ bch2_inode_init(c, &lostfound_inode, 0, 0,
+ S_IFDIR|S_IRWXU|S_IRUGO|S_IXUGO, 0,
+ &root_inode);
+ lostfound_inode.bi_inum = BCACHEFS_ROOT_INO + 1;
+ bch2_inode_pack(&packed_inode, &lostfound_inode);
+
+ err = "error creating lost+found";
+ ret = bch2_btree_insert(c, BTREE_ID_INODES,
+ &packed_inode.inode.k_i,
+ NULL, NULL, 0);
+ if (ret)
+ goto err;
+
+ root_hash_info = bch2_hash_info_init(c, &root_inode);
+
+ ret = bch2_dirent_create(c, BCACHEFS_ROOT_INO, &root_hash_info, DT_DIR,
+ &lostfound, lostfound_inode.bi_inum, NULL,
+ BTREE_INSERT_NOFAIL);
+ if (ret)
+ goto err;
+
+ if (enabled_qtypes(c)) {
+ ret = bch2_fs_quota_read(c);
+ if (ret)
+ goto err;
+ }
+
+ err = "error writing first journal entry";
+ ret = bch2_journal_meta(&c->journal);
+ if (ret)
+ goto err;
+
+ mutex_lock(&c->sb_lock);
+ c->disk_sb.sb->version = c->disk_sb.sb->version_min =
+ le16_to_cpu(bcachefs_metadata_version_current);
+ c->disk_sb.sb->features[0] |= 1ULL << BCH_FEATURE_ATOMIC_NLINK;
+
+ SET_BCH_SB_INITIALIZED(c->disk_sb.sb, true);
+ SET_BCH_SB_CLEAN(c->disk_sb.sb, false);
+
+ bch2_write_super(c);
+ mutex_unlock(&c->sb_lock);
+
+ return 0;
+err:
+ pr_err("Error initializing new filesystem: %s (%i)", err, ret);
+ return ret;
+}
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-01 01:23:02 +0000