]> git.sesse.net Git - bcachefs-tools-debian/blobdiff - libbcachefs/recovery.c
Update bcachefs sources to 2e8463c770 bcachefs: Rework lru btree
[bcachefs-tools-debian] / libbcachefs / recovery.c
index 64b1e79f3182bb01f3757043140fad00a10433ee..8df94ad5d505594f46b9e132e6bc874df65194e5 100644 (file)
@@ -11,6 +11,7 @@
 #include "buckets.h"
 #include "dirent.h"
 #include "ec.h"
+#include "errcode.h"
 #include "error.h"
 #include "fs-common.h"
 #include "fsck.h"
@@ -87,9 +88,9 @@ static inline struct journal_key *idx_to_key(struct journal_keys *keys, size_t i
        return keys->d + idx_to_pos(keys, idx);
 }
 
-static size_t bch2_journal_key_search(struct journal_keys *keys,
-                                     enum btree_id id, unsigned level,
-                                     struct bpos pos)
+static size_t __bch2_journal_key_search(struct journal_keys *keys,
+                                       enum btree_id id, unsigned level,
+                                       struct bpos pos)
 {
        size_t l = 0, r = keys->nr, m;
 
@@ -107,7 +108,14 @@ static size_t bch2_journal_key_search(struct journal_keys *keys,
        BUG_ON(l &&
               __journal_key_cmp(id, level, pos, idx_to_key(keys, l - 1)) <= 0);
 
-       return idx_to_pos(keys, l);
+       return l;
+}
+
+static size_t bch2_journal_key_search(struct journal_keys *keys,
+                                     enum btree_id id, unsigned level,
+                                     struct bpos pos)
+{
+       return idx_to_pos(keys, __bch2_journal_key_search(keys, id, level, pos));
 }
 
 struct bkey_i *bch2_journal_keys_peek_upto(struct bch_fs *c, enum btree_id btree_id,
@@ -116,22 +124,20 @@ struct bkey_i *bch2_journal_keys_peek_upto(struct bch_fs *c, enum btree_id btree
 {
        struct journal_keys *keys = &c->journal_keys;
        unsigned iters = 0;
+       struct journal_key *k;
 search:
        if (!*idx)
-               *idx = bch2_journal_key_search(keys, btree_id, level, pos);
+               *idx = __bch2_journal_key_search(keys, btree_id, level, pos);
 
-       while (*idx < keys->size &&
-              keys->d[*idx].btree_id == btree_id &&
-              keys->d[*idx].level == level &&
-              bpos_cmp(keys->d[*idx].k->k.p, end_pos) <= 0) {
-               if (bpos_cmp(keys->d[*idx].k->k.p, pos) >= 0 &&
-                   !keys->d[*idx].overwritten)
-                       return keys->d[*idx].k;
+       while ((k = *idx < keys->nr ? idx_to_key(keys, *idx) : NULL)) {
+               if (__journal_key_cmp(btree_id, level, end_pos, k) < 0)
+                       return NULL;
 
-               (*idx)++;
-               if (*idx == keys->gap)
-                       *idx += keys->size - keys->nr;
+               if (__journal_key_cmp(btree_id, level, pos, k) <= 0 &&
+                   !k->overwritten)
+                       return k->k;
 
+               (*idx)++;
                iters++;
                if (iters == 10) {
                        *idx = 0;
@@ -216,10 +222,9 @@ int bch2_journal_key_insert_take(struct bch_fs *c, enum btree_id id,
                struct journal_keys new_keys = {
                        .nr                     = keys->nr,
                        .size                   = max_t(size_t, keys->size, 8) * 2,
-                       .journal_seq_base       = keys->journal_seq_base,
                };
 
-               new_keys.d = kvmalloc(sizeof(new_keys.d[0]) * new_keys.size, GFP_KERNEL);
+               new_keys.d = kvmalloc_array(new_keys.size, sizeof(new_keys.d[0]), GFP_KERNEL);
                if (!new_keys.d) {
                        bch_err(c, "%s: error allocating new key array (size %zu)",
                                __func__, new_keys.size);
@@ -290,7 +295,7 @@ void bch2_journal_key_overwritten(struct bch_fs *c, enum btree_id btree,
        if (idx < keys->size &&
            keys->d[idx].btree_id       == btree &&
            keys->d[idx].level          == level &&
-           !bpos_cmp(keys->d[idx].k->k.p, pos))
+           bpos_eq(keys->d[idx].k->k.p, pos))
                keys->d[idx].overwritten = true;
 }
 
@@ -349,7 +354,7 @@ static void bch2_journal_iter_advance_btree(struct btree_and_journal_iter *iter)
 
 void bch2_btree_and_journal_iter_advance(struct btree_and_journal_iter *iter)
 {
-       if (!bpos_cmp(iter->pos, SPOS_MAX))
+       if (bpos_eq(iter->pos, SPOS_MAX))
                iter->at_end = true;
        else
                iter->pos = bpos_successor(iter->pos);
@@ -363,19 +368,19 @@ again:
                return bkey_s_c_null;
 
        while ((btree_k = bch2_journal_iter_peek_btree(iter)).k &&
-              bpos_cmp(btree_k.k->p, iter->pos) < 0)
+              bpos_lt(btree_k.k->p, iter->pos))
                bch2_journal_iter_advance_btree(iter);
 
        while ((journal_k = bch2_journal_iter_peek(&iter->journal)).k &&
-              bpos_cmp(journal_k.k->p, iter->pos) < 0)
+              bpos_lt(journal_k.k->p, iter->pos))
                bch2_journal_iter_advance(&iter->journal);
 
        ret = journal_k.k &&
-               (!btree_k.k || bpos_cmp(journal_k.k->p, btree_k.k->p) <= 0)
+               (!btree_k.k || bpos_le(journal_k.k->p, btree_k.k->p))
                ? journal_k
                : btree_k;
 
-       if (ret.k && iter->b && bpos_cmp(ret.k->p, iter->b->data->max_key) > 0)
+       if (ret.k && iter->b && bpos_gt(ret.k->p, iter->b->data->max_key))
                ret = bkey_s_c_null;
 
        if (ret.k) {
@@ -487,9 +492,6 @@ static int journal_keys_sort(struct bch_fs *c)
                if (!i || i->ignore)
                        continue;
 
-               if (!keys->journal_seq_base)
-                       keys->journal_seq_base = le64_to_cpu(i->j.seq);
-
                for_each_jset_key(k, _n, entry, &i->j)
                        nr_keys++;
        }
@@ -499,7 +501,7 @@ static int journal_keys_sort(struct bch_fs *c)
 
        keys->size = roundup_pow_of_two(nr_keys);
 
-       keys->d = kvmalloc(sizeof(keys->d[0]) * keys->size, GFP_KERNEL);
+       keys->d = kvmalloc_array(keys->size, sizeof(keys->d[0]), GFP_KERNEL);
        if (!keys->d)
                return -ENOMEM;
 
@@ -509,15 +511,12 @@ static int journal_keys_sort(struct bch_fs *c)
                if (!i || i->ignore)
                        continue;
 
-               BUG_ON(le64_to_cpu(i->j.seq) - keys->journal_seq_base > U32_MAX);
-
                for_each_jset_key(k, _n, entry, &i->j)
                        keys->d[keys->nr++] = (struct journal_key) {
                                .btree_id       = entry->btree_id,
                                .level          = entry->level,
                                .k              = k,
-                               .journal_seq    = le64_to_cpu(i->j.seq) -
-                                       keys->journal_seq_base,
+                               .journal_seq    = le64_to_cpu(i->j.seq),
                                .journal_offset = k->_data - i->j._data,
                        };
        }
@@ -529,7 +528,7 @@ static int journal_keys_sort(struct bch_fs *c)
                while (src + 1 < keys->d + keys->nr &&
                       src[0].btree_id  == src[1].btree_id &&
                       src[0].level     == src[1].level &&
-                      !bpos_cmp(src[0].k->k.p, src[1].k->k.p))
+                      bpos_eq(src[0].k->k.p, src[1].k->k.p))
                        src++;
 
                *dst++ = *src++;
@@ -589,7 +588,7 @@ static int journal_sort_seq_cmp(const void *_l, const void *_r)
        return cmp_int(l->journal_seq, r->journal_seq);
 }
 
-static int bch2_journal_replay(struct bch_fs *c)
+static int bch2_journal_replay(struct bch_fs *c, u64 start_seq, u64 end_seq)
 {
        struct journal_keys *keys = &c->journal_keys;
        struct journal_key **keys_sorted, *k;
@@ -611,15 +610,19 @@ static int bch2_journal_replay(struct bch_fs *c)
             sizeof(keys_sorted[0]),
             journal_sort_seq_cmp, NULL);
 
-       if (keys->nr)
-               replay_now_at(j, keys->journal_seq_base);
+       if (keys->nr) {
+               ret = bch2_fs_log_msg(c, "Starting journal replay (%zu keys in entries %llu-%llu)",
+                                     keys->nr, start_seq, end_seq);
+               if (ret)
+                       goto err;
+       }
 
        for (i = 0; i < keys->nr; i++) {
                k = keys_sorted[i];
 
                cond_resched();
 
-               replay_now_at(j, keys->journal_seq_base + k->journal_seq);
+               replay_now_at(j, k->journal_seq);
 
                ret = bch2_trans_do(c, NULL, NULL,
                                    BTREE_INSERT_LAZY_RW|
@@ -629,8 +632,8 @@ static int bch2_journal_replay(struct bch_fs *c)
                                     : 0),
                             bch2_journal_replay_key(&trans, k));
                if (ret) {
-                       bch_err(c, "journal replay: error %d while replaying key at btree %s level %u",
-                               ret, bch2_btree_ids[k->btree_id], k->level);
+                       bch_err(c, "journal replay: error while replaying key at btree %s level %u: %s",
+                               bch2_btree_ids[k->btree_id], k->level, bch2_err_str(ret));
                        goto err;
                }
        }
@@ -643,7 +646,7 @@ static int bch2_journal_replay(struct bch_fs *c)
        ret = bch2_journal_error(j);
 
        if (keys->nr && !ret)
-               bch2_journal_log_msg(&c->journal, "journal replay finished");
+               bch2_fs_log_msg(c, "journal replay finished");
 err:
        kvfree(keys_sorted);
        return ret;
@@ -926,6 +929,7 @@ static bool btree_id_is_alloc(enum btree_id id)
        case BTREE_ID_backpointers:
        case BTREE_ID_need_discard:
        case BTREE_ID_freespace:
+       case BTREE_ID_bucket_gens:
                return true;
        default:
                return false;
@@ -1048,7 +1052,7 @@ int bch2_fs_recovery(struct bch_fs *c)
        const char *err = "cannot allocate memory";
        struct bch_sb_field_clean *clean = NULL;
        struct jset *last_journal_entry = NULL;
-       u64 blacklist_seq, journal_seq;
+       u64 last_seq, blacklist_seq, journal_seq;
        bool write_sb = false;
        int ret = 0;
 
@@ -1090,7 +1094,7 @@ int bch2_fs_recovery(struct bch_fs *c)
        }
 
        if (!c->opts.nochanges) {
-               if (c->sb.version < bcachefs_metadata_version_backpointers) {
+               if (c->sb.version < bcachefs_metadata_version_lru_v2) {
                        bch_info(c, "version prior to backpointers, upgrade and fsck required");
                        c->opts.version_upgrade = true;
                        c->opts.fsck            = true;
@@ -1115,10 +1119,17 @@ int bch2_fs_recovery(struct bch_fs *c)
                struct journal_replay **i;
 
                bch_verbose(c, "starting journal read");
-               ret = bch2_journal_read(c, &blacklist_seq, &journal_seq);
+               ret = bch2_journal_read(c, &last_seq, &blacklist_seq, &journal_seq);
                if (ret)
                        goto err;
 
+               /*
+                * note: cmd_list_journal needs the blacklist table fully up to date so
+                * it can asterisk ignored journal entries:
+                */
+               if (c->opts.read_journal_only)
+                       goto out;
+
                genradix_for_each_reverse(&c->journal_entries, iter, i)
                        if (*i && !(*i)->ignore) {
                                last_journal_entry = &(*i)->j;
@@ -1136,7 +1147,15 @@ int bch2_fs_recovery(struct bch_fs *c)
 
                if (!last_journal_entry) {
                        fsck_err_on(!c->sb.clean, c, "no journal entries found");
-                       goto use_clean;
+                       if (clean)
+                               goto use_clean;
+
+                       genradix_for_each_reverse(&c->journal_entries, iter, i)
+                               if (*i) {
+                                       last_journal_entry = &(*i)->j;
+                                       (*i)->ignore = false;
+                                       break;
+                               }
                }
 
                ret = journal_keys_sort(c);
@@ -1153,7 +1172,7 @@ int bch2_fs_recovery(struct bch_fs *c)
 use_clean:
                if (!clean) {
                        bch_err(c, "no superblock clean section found");
-                       ret = BCH_FSCK_REPAIR_IMPOSSIBLE;
+                       ret = -BCH_ERR_fsck_repair_impossible;
                        goto err;
 
                }
@@ -1182,7 +1201,9 @@ use_clean:
                journal_seq += 8;
 
        if (blacklist_seq != journal_seq) {
-               ret = bch2_journal_seq_blacklist_add(c,
+               ret =   bch2_fs_log_msg(c, "blacklisting entries %llu-%llu",
+                                       blacklist_seq, journal_seq) ?:
+                       bch2_journal_seq_blacklist_add(c,
                                        blacklist_seq, journal_seq);
                if (ret) {
                        bch_err(c, "error creating new journal seq blacklist entry");
@@ -1190,14 +1211,9 @@ use_clean:
                }
        }
 
-       /*
-        * note: cmd_list_journal needs the blacklist table fully up to date so
-        * it can asterisk ignored journal entries:
-        */
-       if (c->opts.read_journal_only)
-               goto out;
-
-       ret = bch2_fs_journal_start(&c->journal, journal_seq);
+       ret =   bch2_fs_log_msg(c, "starting journal at entry %llu, replaying %llu-%llu",
+                               journal_seq, last_seq, blacklist_seq - 1) ?:
+               bch2_fs_journal_start(&c->journal, journal_seq);
        if (ret)
                goto err;
 
@@ -1216,7 +1232,9 @@ use_clean:
        err = "error reading allocation information";
 
        down_read(&c->gc_lock);
-       ret = bch2_alloc_read(c);
+       ret = c->sb.version < bcachefs_metadata_version_bucket_gens
+               ? bch2_alloc_read(c)
+               : bch2_bucket_gens_read(c);
        up_read(&c->gc_lock);
 
        if (ret)
@@ -1244,23 +1262,39 @@ use_clean:
 
                set_bit(BCH_FS_INITIAL_GC_DONE, &c->flags);
 
-               bch_info(c, "checking need_discard and freespace btrees");
-               err = "error checking need_discard and freespace btrees";
-               ret = bch2_check_alloc_info(c);
+               if (c->sb.version < bcachefs_metadata_version_snapshot_2) {
+                       err = "error creating root snapshot node";
+                       ret = bch2_fs_initialize_subvolumes(c);
+                       if (ret)
+                               goto err;
+               }
+
+               bch_verbose(c, "reading snapshots table");
+               err = "error reading snapshots table";
+               ret = bch2_fs_snapshots_start(c);
                if (ret)
                        goto err;
-               bch_verbose(c, "done checking need_discard and freespace btrees");
+               bch_verbose(c, "reading snapshots done");
 
                set_bit(BCH_FS_MAY_GO_RW, &c->flags);
 
                bch_info(c, "starting journal replay, %zu keys", c->journal_keys.nr);
                err = "journal replay failed";
-               ret = bch2_journal_replay(c);
+               ret = bch2_journal_replay(c, last_seq, blacklist_seq - 1);
                if (ret)
                        goto err;
                if (c->opts.verbose || !c->sb.clean)
                        bch_info(c, "journal replay done");
 
+               bch_info(c, "checking need_discard and freespace btrees");
+               err = "error checking need_discard and freespace btrees";
+               ret = bch2_check_alloc_info(c);
+               if (ret)
+                       goto err;
+               bch_verbose(c, "done checking need_discard and freespace btrees");
+
+               set_bit(BCH_FS_CHECK_ALLOC_DONE, &c->flags);
+
                bch_info(c, "checking lrus");
                err = "error checking lrus";
                ret = bch2_check_lrus(c);
@@ -1299,8 +1333,8 @@ use_clean:
                bch_verbose(c, "done checking alloc to lru refs");
                set_bit(BCH_FS_CHECK_ALLOC_TO_LRU_REFS_DONE, &c->flags);
        } else {
-               set_bit(BCH_FS_MAY_GO_RW, &c->flags);
                set_bit(BCH_FS_INITIAL_GC_DONE, &c->flags);
+               set_bit(BCH_FS_CHECK_ALLOC_DONE, &c->flags);
                set_bit(BCH_FS_CHECK_LRUS_DONE, &c->flags);
                set_bit(BCH_FS_CHECK_BACKPOINTERS_DONE, &c->flags);
                set_bit(BCH_FS_CHECK_ALLOC_TO_LRU_REFS_DONE, &c->flags);
@@ -1309,9 +1343,25 @@ use_clean:
                if (c->opts.norecovery)
                        goto out;
 
+               if (c->sb.version < bcachefs_metadata_version_snapshot_2) {
+                       err = "error creating root snapshot node";
+                       ret = bch2_fs_initialize_subvolumes(c);
+                       if (ret)
+                               goto err;
+               }
+
+               bch_verbose(c, "reading snapshots table");
+               err = "error reading snapshots table";
+               ret = bch2_fs_snapshots_start(c);
+               if (ret)
+                       goto err;
+               bch_verbose(c, "reading snapshots done");
+
+               set_bit(BCH_FS_MAY_GO_RW, &c->flags);
+
                bch_verbose(c, "starting journal replay, %zu keys", c->journal_keys.nr);
                err = "journal replay failed";
-               ret = bch2_journal_replay(c);
+               ret = bch2_journal_replay(c, last_seq, blacklist_seq - 1);
                if (ret)
                        goto err;
                if (c->opts.verbose || !c->sb.clean)
@@ -1323,22 +1373,16 @@ use_clean:
        if (ret)
                goto err;
 
-       if (c->sb.version < bcachefs_metadata_version_snapshot_2) {
-               bch2_fs_lazy_rw(c);
-
-               err = "error creating root snapshot node";
-               ret = bch2_fs_initialize_subvolumes(c);
+       if (c->sb.version < bcachefs_metadata_version_bucket_gens &&
+           c->opts.version_upgrade) {
+               bch_info(c, "initializing bucket_gens");
+               err = "error initializing bucket gens";
+               ret = bch2_bucket_gens_init(c);
                if (ret)
                        goto err;
+               bch_verbose(c, "bucket_gens init done");
        }
 
-       bch_verbose(c, "reading snapshots table");
-       err = "error reading snapshots table";
-       ret = bch2_fs_snapshots_start(c);
-       if (ret)
-               goto err;
-       bch_verbose(c, "reading snapshots done");
-
        if (c->sb.version < bcachefs_metadata_version_snapshot_2) {
                /* set bi_subvol on root inode */
                err = "error upgrade root inode for subvolumes";
@@ -1401,7 +1445,7 @@ use_clean:
            le16_to_cpu(c->sb.version_min) < bcachefs_metadata_version_btree_ptr_sectors_written) {
                struct bch_move_stats stats;
 
-               bch_move_stats_init(&stats, "recovery");
+               bch2_move_stats_init(&stats, "recovery");
 
                bch_info(c, "scanning for old btree nodes");
                ret = bch2_fs_read_write(c);
@@ -1423,7 +1467,8 @@ out:
        set_bit(BCH_FS_FSCK_DONE, &c->flags);
        bch2_flush_fsck_errs(c);
 
-       if (!c->opts.keep_journal) {
+       if (!c->opts.keep_journal &&
+           test_bit(JOURNAL_REPLAY_DONE, &c->journal.flags)) {
                bch2_journal_keys_free(&c->journal_keys);
                bch2_journal_entries_free(c);
        }
@@ -1435,9 +1480,9 @@ out:
        }
 
        if (ret)
-               bch_err(c, "Error in recovery: %s (%i)", err, ret);
+               bch_err(c, "Error in recovery: %s (%s)", err, bch2_err_str(ret));
        else
-               bch_verbose(c, "ret %i", ret);
+               bch_verbose(c, "ret %s", bch2_err_str(ret));
        return ret;
 err:
 fsck_err:
@@ -1461,7 +1506,7 @@ int bch2_fs_initialize(struct bch_fs *c)
        c->disk_sb.sb->compat[0] |= cpu_to_le64(1ULL << BCH_COMPAT_extents_above_btree_updates_done);
        c->disk_sb.sb->compat[0] |= cpu_to_le64(1ULL << BCH_COMPAT_bformat_overflow_done);
 
-       if (c->sb.version < bcachefs_metadata_version_backpointers)
+       if (c->sb.version < bcachefs_metadata_version_inode_v3)
                c->opts.version_upgrade = true;
 
        if (c->opts.version_upgrade) {
@@ -1472,6 +1517,9 @@ int bch2_fs_initialize(struct bch_fs *c)
        mutex_unlock(&c->sb_lock);
 
        set_bit(BCH_FS_INITIAL_GC_DONE, &c->flags);
+       set_bit(BCH_FS_CHECK_LRUS_DONE, &c->flags);
+       set_bit(BCH_FS_CHECK_BACKPOINTERS_DONE, &c->flags);
+       set_bit(BCH_FS_CHECK_ALLOC_TO_LRU_REFS_DONE, &c->flags);
        set_bit(BCH_FS_MAY_GO_RW, &c->flags);
        set_bit(BCH_FS_FSCK_DONE, &c->flags);
 
@@ -1536,11 +1584,10 @@ int bch2_fs_initialize(struct bch_fs *c)
                goto err;
        bch_verbose(c, "reading snapshots done");
 
-       bch2_inode_init(c, &root_inode, 0, 0,
-                       S_IFDIR|S_IRWXU|S_IRUGO|S_IXUGO, 0, NULL);
+       bch2_inode_init(c, &root_inode, 0, 0, S_IFDIR|0755, 0, NULL);
        root_inode.bi_inum      = BCACHEFS_ROOT_INO;
        root_inode.bi_subvol    = BCACHEFS_ROOT_SUBVOL;
-       bch2_inode_pack(c, &packed_inode, &root_inode);
+       bch2_inode_pack(&packed_inode, &root_inode);
        packed_inode.inode.k.p.snapshot = U32_MAX;
 
        err = "error creating root directory";