X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libbcachefs%2Falloc_background.c;h=19ef7a444c23bd43b82bf35fe18f372e9157f944;hb=1e358401ecdf1963e5799de19ab69111e82e5ebc;hp=0c33424393bee1b87300e657cfc4c5866cb642f9;hpb=3765483ff0cf9abd0243fcafe11aebd0f9beb03d;p=bcachefs-tools-debian diff --git a/libbcachefs/alloc_background.c b/libbcachefs/alloc_background.c index 0c33424..19ef7a4 100644 --- a/libbcachefs/alloc_background.c +++ b/libbcachefs/alloc_background.c @@ -2,12 +2,14 @@ #include "bcachefs.h" #include "alloc_background.h" #include "alloc_foreground.h" +#include "backpointers.h" #include "btree_cache.h" #include "btree_io.h" #include "btree_key_cache.h" #include "btree_update.h" #include "btree_update_interior.h" #include "btree_gc.h" +#include "btree_write_buffer.h" #include "buckets.h" #include "buckets_waiting_for_journal.h" #include "clock.h" @@ -16,6 +18,7 @@ #include "error.h" #include "lru.h" #include "recovery.h" +#include "trace.h" #include "varint.h" #include @@ -25,7 +28,8 @@ #include #include #include -#include + +/* Persistent alloc info: */ static const unsigned BCH_ALLOC_V1_FIELD_BYTES[] = { #define x(name, bits) [BCH_ALLOC_FIELD_V1_##name] = bits / 8, @@ -33,17 +37,18 @@ static const unsigned BCH_ALLOC_V1_FIELD_BYTES[] = { #undef x }; -const char * const bch2_bucket_states[] = { - "free", - "need gc gens", - "need discard", - "cached", - "dirty", - NULL +struct bkey_alloc_unpacked { + u64 journal_seq; + u8 gen; + u8 oldest_gen; + u8 data_type; + bool need_discard:1; + bool need_inc_gen:1; +#define x(_name, _bits) u##_bits _name; + BCH_ALLOC_FIELDS_V2() +#undef x }; -/* Persistent alloc info: */ - static inline u64 alloc_field_v1_get(const struct bch_alloc *a, const void **p, unsigned field) { @@ -74,36 +79,6 @@ static inline u64 alloc_field_v1_get(const struct bch_alloc *a, return v; } -static inline void alloc_field_v1_put(struct bkey_i_alloc *a, void **p, - unsigned field, u64 v) -{ - unsigned bytes = BCH_ALLOC_V1_FIELD_BYTES[field]; - - if (!v) - return; - - a->v.fields |= 1 << field; - - switch (bytes) { - case 1: - *((u8 *) *p) = v; - break; - case 2: - *((__le16 *) *p) = cpu_to_le16(v); - break; - case 4: - *((__le32 *) *p) = cpu_to_le32(v); - break; - case 8: - *((__le64 *) *p) = cpu_to_le64(v); - break; - default: - BUG(); - } - - *p += bytes; -} - static void bch2_alloc_unpack_v1(struct bkey_alloc_unpacked *out, struct bkey_s_c k) { @@ -164,8 +139,8 @@ static int bch2_alloc_unpack_v3(struct bkey_alloc_unpacked *out, out->gen = a.v->gen; out->oldest_gen = a.v->oldest_gen; out->data_type = a.v->data_type; - out->need_discard = BCH_ALLOC_NEED_DISCARD(a.v); - out->need_inc_gen = BCH_ALLOC_NEED_INC_GEN(a.v); + out->need_discard = BCH_ALLOC_V3_NEED_DISCARD(a.v); + out->need_inc_gen = BCH_ALLOC_V3_NEED_INC_GEN(a.v); out->journal_seq = le64_to_cpu(a.v->journal_seq); #define x(_name, _bits) \ @@ -187,55 +162,9 @@ static int bch2_alloc_unpack_v3(struct bkey_alloc_unpacked *out, return 0; } -static void bch2_alloc_pack_v3(struct bkey_alloc_buf *dst, - const struct bkey_alloc_unpacked src) -{ - struct bkey_i_alloc_v3 *a = bkey_alloc_v3_init(&dst->k); - unsigned nr_fields = 0, last_nonzero_fieldnr = 0; - u8 *out = a->v.data; - u8 *end = (void *) &dst[1]; - u8 *last_nonzero_field = out; - unsigned bytes; - - a->k.p = POS(src.dev, src.bucket); - a->v.gen = src.gen; - a->v.oldest_gen = src.oldest_gen; - a->v.data_type = src.data_type; - a->v.journal_seq = cpu_to_le64(src.journal_seq); - SET_BCH_ALLOC_NEED_DISCARD(&a->v, src.need_discard); - SET_BCH_ALLOC_NEED_INC_GEN(&a->v, src.need_inc_gen); - -#define x(_name, _bits) \ - nr_fields++; \ - \ - if (src._name) { \ - out += bch2_varint_encode_fast(out, src._name); \ - \ - last_nonzero_field = out; \ - last_nonzero_fieldnr = nr_fields; \ - } else { \ - *out++ = 0; \ - } - - BCH_ALLOC_FIELDS_V2() -#undef x - BUG_ON(out > end); - - out = last_nonzero_field; - a->v.nr_fields = last_nonzero_fieldnr; - - bytes = (u8 *) out - (u8 *) &a->v; - set_bkey_val_bytes(&a->k, bytes); - memset_u64s_tail(&a->v, 0, bytes); -} - -struct bkey_alloc_unpacked bch2_alloc_unpack(struct bkey_s_c k) +static struct bkey_alloc_unpacked bch2_alloc_unpack(struct bkey_s_c k) { - struct bkey_alloc_unpacked ret = { - .dev = k.k->p.inode, - .bucket = k.k->p.offset, - .gen = 0, - }; + struct bkey_alloc_unpacked ret = { .gen = 0 }; switch (k.k->type) { case KEY_TYPE_alloc: @@ -252,116 +181,492 @@ struct bkey_alloc_unpacked bch2_alloc_unpack(struct bkey_s_c k) return ret; } -struct bkey_alloc_buf *bch2_alloc_pack(struct btree_trans *trans, - const struct bkey_alloc_unpacked src) +static unsigned bch_alloc_v1_val_u64s(const struct bch_alloc *a) { - struct bkey_alloc_buf *dst; + unsigned i, bytes = offsetof(struct bch_alloc, data); - dst = bch2_trans_kmalloc(trans, sizeof(struct bkey_alloc_buf)); - if (!IS_ERR(dst)) - bch2_alloc_pack_v3(dst, src); + for (i = 0; i < ARRAY_SIZE(BCH_ALLOC_V1_FIELD_BYTES); i++) + if (a->fields & (1 << i)) + bytes += BCH_ALLOC_V1_FIELD_BYTES[i]; - return dst; + return DIV_ROUND_UP(bytes, sizeof(u64)); } -int bch2_alloc_write(struct btree_trans *trans, struct btree_iter *iter, - struct bkey_alloc_unpacked *u, unsigned trigger_flags) +int bch2_alloc_v1_invalid(const struct bch_fs *c, struct bkey_s_c k, + enum bkey_invalid_flags flags, + struct printbuf *err) { - struct bkey_alloc_buf *a = bch2_alloc_pack(trans, *u); + struct bkey_s_c_alloc a = bkey_s_c_to_alloc(k); - return PTR_ERR_OR_ZERO(a) ?: - bch2_trans_update(trans, iter, &a->k, trigger_flags); + /* allow for unknown fields */ + if (bkey_val_u64s(a.k) < bch_alloc_v1_val_u64s(a.v)) { + prt_printf(err, "incorrect value size (%zu < %u)", + bkey_val_u64s(a.k), bch_alloc_v1_val_u64s(a.v)); + return -BCH_ERR_invalid_bkey; + } + + return 0; } -static unsigned bch_alloc_v1_val_u64s(const struct bch_alloc *a) +int bch2_alloc_v2_invalid(const struct bch_fs *c, struct bkey_s_c k, + enum bkey_invalid_flags flags, + struct printbuf *err) { - unsigned i, bytes = offsetof(struct bch_alloc, data); + struct bkey_alloc_unpacked u; - for (i = 0; i < ARRAY_SIZE(BCH_ALLOC_V1_FIELD_BYTES); i++) - if (a->fields & (1 << i)) - bytes += BCH_ALLOC_V1_FIELD_BYTES[i]; + if (bch2_alloc_unpack_v2(&u, k)) { + prt_printf(err, "unpack error"); + return -BCH_ERR_invalid_bkey; + } - return DIV_ROUND_UP(bytes, sizeof(u64)); + return 0; } -const char *bch2_alloc_v1_invalid(const struct bch_fs *c, struct bkey_s_c k) +int bch2_alloc_v3_invalid(const struct bch_fs *c, struct bkey_s_c k, + enum bkey_invalid_flags flags, + struct printbuf *err) { - struct bkey_s_c_alloc a = bkey_s_c_to_alloc(k); + struct bkey_alloc_unpacked u; - if (k.k->p.inode >= c->sb.nr_devices || - !c->devs[k.k->p.inode]) - return "invalid device"; + if (bch2_alloc_unpack_v3(&u, k)) { + prt_printf(err, "unpack error"); + return -BCH_ERR_invalid_bkey; + } - /* allow for unknown fields */ - if (bkey_val_u64s(a.k) < bch_alloc_v1_val_u64s(a.v)) - return "incorrect value size"; + return 0; +} + +int bch2_alloc_v4_invalid(const struct bch_fs *c, struct bkey_s_c k, + enum bkey_invalid_flags flags, struct printbuf *err) +{ + struct bkey_s_c_alloc_v4 a = bkey_s_c_to_alloc_v4(k); + + if (alloc_v4_u64s(a.v) > bkey_val_u64s(k.k)) { + prt_printf(err, "bad val size (%u > %zu)", + alloc_v4_u64s(a.v), bkey_val_u64s(k.k)); + return -BCH_ERR_invalid_bkey; + } + + if (!BCH_ALLOC_V4_BACKPOINTERS_START(a.v) && + BCH_ALLOC_V4_NR_BACKPOINTERS(a.v)) { + prt_printf(err, "invalid backpointers_start"); + return -BCH_ERR_invalid_bkey; + } + + if (alloc_data_type(*a.v, a.v->data_type) != a.v->data_type) { + prt_printf(err, "invalid data type (got %u should be %u)", + a.v->data_type, alloc_data_type(*a.v, a.v->data_type)); + return -BCH_ERR_invalid_bkey; + } - return NULL; + switch (a.v->data_type) { + case BCH_DATA_free: + case BCH_DATA_need_gc_gens: + case BCH_DATA_need_discard: + if (a.v->dirty_sectors || + a.v->cached_sectors || + a.v->stripe) { + prt_printf(err, "empty data type free but have data"); + return -BCH_ERR_invalid_bkey; + } + break; + case BCH_DATA_sb: + case BCH_DATA_journal: + case BCH_DATA_btree: + case BCH_DATA_user: + case BCH_DATA_parity: + if (!a.v->dirty_sectors) { + prt_printf(err, "data_type %s but dirty_sectors==0", + bch2_data_types[a.v->data_type]); + return -BCH_ERR_invalid_bkey; + } + break; + case BCH_DATA_cached: + if (!a.v->cached_sectors || + a.v->dirty_sectors || + a.v->stripe) { + prt_printf(err, "data type inconsistency"); + return -BCH_ERR_invalid_bkey; + } + + if (!a.v->io_time[READ] && + c->curr_recovery_pass > BCH_RECOVERY_PASS_check_alloc_to_lru_refs) { + prt_printf(err, "cached bucket with read_time == 0"); + return -BCH_ERR_invalid_bkey; + } + break; + case BCH_DATA_stripe: + break; + } + + return 0; } -const char *bch2_alloc_v2_invalid(const struct bch_fs *c, struct bkey_s_c k) +static inline u64 swab40(u64 x) { - struct bkey_alloc_unpacked u; + return (((x & 0x00000000ffULL) << 32)| + ((x & 0x000000ff00ULL) << 16)| + ((x & 0x0000ff0000ULL) >> 0)| + ((x & 0x00ff000000ULL) >> 16)| + ((x & 0xff00000000ULL) >> 32)); +} - if (k.k->p.inode >= c->sb.nr_devices || - !c->devs[k.k->p.inode]) - return "invalid device"; +void bch2_alloc_v4_swab(struct bkey_s k) +{ + struct bch_alloc_v4 *a = bkey_s_to_alloc_v4(k).v; + struct bch_backpointer *bp, *bps; + + a->journal_seq = swab64(a->journal_seq); + a->flags = swab32(a->flags); + a->dirty_sectors = swab32(a->dirty_sectors); + a->cached_sectors = swab32(a->cached_sectors); + a->io_time[0] = swab64(a->io_time[0]); + a->io_time[1] = swab64(a->io_time[1]); + a->stripe = swab32(a->stripe); + a->nr_external_backpointers = swab32(a->nr_external_backpointers); + + bps = alloc_v4_backpointers(a); + for (bp = bps; bp < bps + BCH_ALLOC_V4_NR_BACKPOINTERS(a); bp++) { + bp->bucket_offset = swab40(bp->bucket_offset); + bp->bucket_len = swab32(bp->bucket_len); + bch2_bpos_swab(&bp->pos); + } +} - if (bch2_alloc_unpack_v2(&u, k)) - return "unpack error"; +void bch2_alloc_to_text(struct printbuf *out, struct bch_fs *c, struct bkey_s_c k) +{ + struct bch_alloc_v4 _a; + const struct bch_alloc_v4 *a = bch2_alloc_to_v4(k, &_a); + unsigned i; - return NULL; + prt_newline(out); + printbuf_indent_add(out, 2); + + prt_printf(out, "gen %u oldest_gen %u data_type %s", + a->gen, a->oldest_gen, + a->data_type < BCH_DATA_NR + ? bch2_data_types[a->data_type] + : "(invalid data type)"); + prt_newline(out); + prt_printf(out, "journal_seq %llu", a->journal_seq); + prt_newline(out); + prt_printf(out, "need_discard %llu", BCH_ALLOC_V4_NEED_DISCARD(a)); + prt_newline(out); + prt_printf(out, "need_inc_gen %llu", BCH_ALLOC_V4_NEED_INC_GEN(a)); + prt_newline(out); + prt_printf(out, "dirty_sectors %u", a->dirty_sectors); + prt_newline(out); + prt_printf(out, "cached_sectors %u", a->cached_sectors); + prt_newline(out); + prt_printf(out, "stripe %u", a->stripe); + prt_newline(out); + prt_printf(out, "stripe_redundancy %u", a->stripe_redundancy); + prt_newline(out); + prt_printf(out, "io_time[READ] %llu", a->io_time[READ]); + prt_newline(out); + prt_printf(out, "io_time[WRITE] %llu", a->io_time[WRITE]); + prt_newline(out); + prt_printf(out, "fragmentation %llu", a->fragmentation_lru); + prt_newline(out); + prt_printf(out, "bp_start %llu", BCH_ALLOC_V4_BACKPOINTERS_START(a)); + prt_newline(out); + + if (BCH_ALLOC_V4_NR_BACKPOINTERS(a)) { + struct bkey_s_c_alloc_v4 a_raw = bkey_s_c_to_alloc_v4(k); + const struct bch_backpointer *bps = alloc_v4_backpointers_c(a_raw.v); + + prt_printf(out, "backpointers: %llu", BCH_ALLOC_V4_NR_BACKPOINTERS(a_raw.v)); + printbuf_indent_add(out, 2); + + for (i = 0; i < BCH_ALLOC_V4_NR_BACKPOINTERS(a_raw.v); i++) { + prt_newline(out); + bch2_backpointer_to_text(out, &bps[i]); + } + + printbuf_indent_sub(out, 2); + } + + printbuf_indent_sub(out, 2); } -const char *bch2_alloc_v3_invalid(const struct bch_fs *c, struct bkey_s_c k) +void __bch2_alloc_to_v4(struct bkey_s_c k, struct bch_alloc_v4 *out) { - struct bkey_alloc_unpacked u; + if (k.k->type == KEY_TYPE_alloc_v4) { + void *src, *dst; + + *out = *bkey_s_c_to_alloc_v4(k).v; + + src = alloc_v4_backpointers(out); + SET_BCH_ALLOC_V4_BACKPOINTERS_START(out, BCH_ALLOC_V4_U64s); + dst = alloc_v4_backpointers(out); + + if (src < dst) + memset(src, 0, dst - src); + + SET_BCH_ALLOC_V4_NR_BACKPOINTERS(out, 0); + } else { + struct bkey_alloc_unpacked u = bch2_alloc_unpack(k); + + *out = (struct bch_alloc_v4) { + .journal_seq = u.journal_seq, + .flags = u.need_discard, + .gen = u.gen, + .oldest_gen = u.oldest_gen, + .data_type = u.data_type, + .stripe_redundancy = u.stripe_redundancy, + .dirty_sectors = u.dirty_sectors, + .cached_sectors = u.cached_sectors, + .io_time[READ] = u.read_time, + .io_time[WRITE] = u.write_time, + .stripe = u.stripe, + }; + + SET_BCH_ALLOC_V4_BACKPOINTERS_START(out, BCH_ALLOC_V4_U64s); + } +} - if (k.k->p.inode >= c->sb.nr_devices || - !c->devs[k.k->p.inode]) - return "invalid device"; +static noinline struct bkey_i_alloc_v4 * +__bch2_alloc_to_v4_mut(struct btree_trans *trans, struct bkey_s_c k) +{ + struct bkey_i_alloc_v4 *ret; - if (bch2_alloc_unpack_v3(&u, k)) - return "unpack error"; + ret = bch2_trans_kmalloc(trans, max(bkey_bytes(k.k), sizeof(struct bkey_i_alloc_v4))); + if (IS_ERR(ret)) + return ret; - return NULL; + if (k.k->type == KEY_TYPE_alloc_v4) { + void *src, *dst; + + bkey_reassemble(&ret->k_i, k); + + src = alloc_v4_backpointers(&ret->v); + SET_BCH_ALLOC_V4_BACKPOINTERS_START(&ret->v, BCH_ALLOC_V4_U64s); + dst = alloc_v4_backpointers(&ret->v); + + if (src < dst) + memset(src, 0, dst - src); + + SET_BCH_ALLOC_V4_NR_BACKPOINTERS(&ret->v, 0); + set_alloc_v4_u64s(ret); + } else { + bkey_alloc_v4_init(&ret->k_i); + ret->k.p = k.k->p; + bch2_alloc_to_v4(k, &ret->v); + } + return ret; } -void bch2_alloc_to_text(struct printbuf *out, struct bch_fs *c, - struct bkey_s_c k) +static inline struct bkey_i_alloc_v4 *bch2_alloc_to_v4_mut_inlined(struct btree_trans *trans, struct bkey_s_c k) { - struct bkey_alloc_unpacked u = bch2_alloc_unpack(k); + struct bkey_s_c_alloc_v4 a; - pr_buf(out, "gen %u oldest_gen %u data_type %s journal_seq %llu need_discard %u", - u.gen, u.oldest_gen, bch2_data_types[u.data_type], - u.journal_seq, u.need_discard); -#define x(_name, ...) pr_buf(out, " " #_name " %llu", (u64) u._name); - BCH_ALLOC_FIELDS_V2() -#undef x + if (likely(k.k->type == KEY_TYPE_alloc_v4) && + ((a = bkey_s_c_to_alloc_v4(k), true) && + BCH_ALLOC_V4_NR_BACKPOINTERS(a.v) == 0)) + return bch2_bkey_make_mut_noupdate_typed(trans, k, alloc_v4); + + return __bch2_alloc_to_v4_mut(trans, k); +} + +struct bkey_i_alloc_v4 *bch2_alloc_to_v4_mut(struct btree_trans *trans, struct bkey_s_c k) +{ + return bch2_alloc_to_v4_mut_inlined(trans, k); +} + +struct bkey_i_alloc_v4 * +bch2_trans_start_alloc_update(struct btree_trans *trans, struct btree_iter *iter, + struct bpos pos) +{ + struct bkey_s_c k; + struct bkey_i_alloc_v4 *a; + int ret; + + k = bch2_bkey_get_iter(trans, iter, BTREE_ID_alloc, pos, + BTREE_ITER_WITH_UPDATES| + BTREE_ITER_CACHED| + BTREE_ITER_INTENT); + ret = bkey_err(k); + if (unlikely(ret)) + return ERR_PTR(ret); + + a = bch2_alloc_to_v4_mut_inlined(trans, k); + ret = PTR_ERR_OR_ZERO(a); + if (unlikely(ret)) + goto err; + return a; +err: + bch2_trans_iter_exit(trans, iter); + return ERR_PTR(ret); +} + +static struct bpos alloc_gens_pos(struct bpos pos, unsigned *offset) +{ + *offset = pos.offset & KEY_TYPE_BUCKET_GENS_MASK; + + pos.offset >>= KEY_TYPE_BUCKET_GENS_BITS; + return pos; +} + +static struct bpos bucket_gens_pos_to_alloc(struct bpos pos, unsigned offset) +{ + pos.offset <<= KEY_TYPE_BUCKET_GENS_BITS; + pos.offset += offset; + return pos; +} + +static unsigned alloc_gen(struct bkey_s_c k, unsigned offset) +{ + return k.k->type == KEY_TYPE_bucket_gens + ? bkey_s_c_to_bucket_gens(k).v->gens[offset] + : 0; +} + +int bch2_bucket_gens_invalid(const struct bch_fs *c, struct bkey_s_c k, + enum bkey_invalid_flags flags, + struct printbuf *err) +{ + if (bkey_val_bytes(k.k) != sizeof(struct bch_bucket_gens)) { + prt_printf(err, "bad val size (%zu != %zu)", + bkey_val_bytes(k.k), sizeof(struct bch_bucket_gens)); + return -BCH_ERR_invalid_bkey; + } + + return 0; +} + +void bch2_bucket_gens_to_text(struct printbuf *out, struct bch_fs *c, struct bkey_s_c k) +{ + struct bkey_s_c_bucket_gens g = bkey_s_c_to_bucket_gens(k); + unsigned i; + + for (i = 0; i < ARRAY_SIZE(g.v->gens); i++) { + if (i) + prt_char(out, ' '); + prt_printf(out, "%u", g.v->gens[i]); + } +} + +int bch2_bucket_gens_init(struct bch_fs *c) +{ + struct btree_trans *trans = bch2_trans_get(c); + struct btree_iter iter; + struct bkey_s_c k; + struct bch_alloc_v4 a; + struct bkey_i_bucket_gens g; + bool have_bucket_gens_key = false; + unsigned offset; + struct bpos pos; + u8 gen; + int ret; + + for_each_btree_key(trans, iter, BTREE_ID_alloc, POS_MIN, + BTREE_ITER_PREFETCH, k, ret) { + /* + * Not a fsck error because this is checked/repaired by + * bch2_check_alloc_key() which runs later: + */ + if (!bch2_dev_bucket_exists(c, k.k->p)) + continue; + + gen = bch2_alloc_to_v4(k, &a)->gen; + pos = alloc_gens_pos(iter.pos, &offset); + + if (have_bucket_gens_key && bkey_cmp(iter.pos, pos)) { + ret = commit_do(trans, NULL, NULL, + BTREE_INSERT_NOFAIL| + BTREE_INSERT_LAZY_RW, + bch2_btree_insert_trans(trans, BTREE_ID_bucket_gens, &g.k_i, 0)); + if (ret) + break; + have_bucket_gens_key = false; + } + + if (!have_bucket_gens_key) { + bkey_bucket_gens_init(&g.k_i); + g.k.p = pos; + have_bucket_gens_key = true; + } + + g.v.gens[offset] = gen; + } + bch2_trans_iter_exit(trans, &iter); + + if (have_bucket_gens_key && !ret) + ret = commit_do(trans, NULL, NULL, + BTREE_INSERT_NOFAIL| + BTREE_INSERT_LAZY_RW, + bch2_btree_insert_trans(trans, BTREE_ID_bucket_gens, &g.k_i, 0)); + + bch2_trans_put(trans); + + if (ret) + bch_err_fn(c, ret); + return ret; } int bch2_alloc_read(struct bch_fs *c) { - struct btree_trans trans; + struct btree_trans *trans = bch2_trans_get(c); struct btree_iter iter; struct bkey_s_c k; struct bch_dev *ca; int ret; - bch2_trans_init(&trans, c, 0, 0); + down_read(&c->gc_lock); - for_each_btree_key(&trans, iter, BTREE_ID_alloc, POS_MIN, - BTREE_ITER_PREFETCH, k, ret) { - ca = bch_dev_bkey_exists(c, k.k->p.inode); + if (c->sb.version_upgrade_complete >= bcachefs_metadata_version_bucket_gens) { + const struct bch_bucket_gens *g; + u64 b; + + for_each_btree_key(trans, iter, BTREE_ID_bucket_gens, POS_MIN, + BTREE_ITER_PREFETCH, k, ret) { + u64 start = bucket_gens_pos_to_alloc(k.k->p, 0).offset; + u64 end = bucket_gens_pos_to_alloc(bpos_nosnap_successor(k.k->p), 0).offset; + + if (k.k->type != KEY_TYPE_bucket_gens) + continue; + + g = bkey_s_c_to_bucket_gens(k).v; + + /* + * Not a fsck error because this is checked/repaired by + * bch2_check_alloc_key() which runs later: + */ + if (!bch2_dev_exists2(c, k.k->p.inode)) + continue; + + ca = bch_dev_bkey_exists(c, k.k->p.inode); + + for (b = max_t(u64, ca->mi.first_bucket, start); + b < min_t(u64, ca->mi.nbuckets, end); + b++) + *bucket_gen(ca, b) = g->gens[b & KEY_TYPE_BUCKET_GENS_MASK]; + } + bch2_trans_iter_exit(trans, &iter); + } else { + struct bch_alloc_v4 a; + + for_each_btree_key(trans, iter, BTREE_ID_alloc, POS_MIN, + BTREE_ITER_PREFETCH, k, ret) { + /* + * Not a fsck error because this is checked/repaired by + * bch2_check_alloc_key() which runs later: + */ + if (!bch2_dev_bucket_exists(c, k.k->p)) + continue; - *bucket_gen(ca, k.k->p.offset) = bch2_alloc_unpack(k).gen; + ca = bch_dev_bkey_exists(c, k.k->p.inode); + + *bucket_gen(ca, k.k->p.offset) = bch2_alloc_to_v4(k, &a)->gen; + } + bch2_trans_iter_exit(trans, &iter); } - bch2_trans_iter_exit(&trans, &iter); - bch2_trans_exit(&trans); + bch2_trans_put(trans); + up_read(&c->gc_lock); if (ret) - bch_err(c, "error reading alloc info: %i", ret); + bch_err_fn(c, ret); return ret; } @@ -370,60 +675,61 @@ int bch2_alloc_read(struct bch_fs *c) static int bch2_bucket_do_index(struct btree_trans *trans, struct bkey_s_c alloc_k, - struct bkey_alloc_unpacked a, + const struct bch_alloc_v4 *a, bool set) { struct bch_fs *c = trans->c; - struct bch_dev *ca = bch_dev_bkey_exists(c, a.dev); + struct bch_dev *ca = bch_dev_bkey_exists(c, alloc_k.k->p.inode); struct btree_iter iter; struct bkey_s_c old; struct bkey_i *k; - enum bucket_state state = bucket_state(a); enum btree_id btree; enum bch_bkey_type old_type = !set ? KEY_TYPE_set : KEY_TYPE_deleted; enum bch_bkey_type new_type = set ? KEY_TYPE_set : KEY_TYPE_deleted; struct printbuf buf = PRINTBUF; int ret; - if (state != BUCKET_free && - state != BUCKET_need_discard) + if (a->data_type != BCH_DATA_free && + a->data_type != BCH_DATA_need_discard) return 0; - k = bch2_trans_kmalloc(trans, sizeof(*k)); + k = bch2_trans_kmalloc_nomemzero(trans, sizeof(*k)); if (IS_ERR(k)) return PTR_ERR(k); bkey_init(&k->k); k->k.type = new_type; - switch (state) { - case BUCKET_free: + switch (a->data_type) { + case BCH_DATA_free: btree = BTREE_ID_freespace; - k->k.p = alloc_freespace_pos(a); + k->k.p = alloc_freespace_pos(alloc_k.k->p, *a); bch2_key_resize(&k->k, 1); break; - case BUCKET_need_discard: + case BCH_DATA_need_discard: btree = BTREE_ID_need_discard; - k->k.p = POS(a.dev, a.bucket); + k->k.p = alloc_k.k->p; break; default: return 0; } - bch2_trans_iter_init(trans, &iter, btree, + old = bch2_bkey_get_iter(trans, &iter, btree, bkey_start_pos(&k->k), BTREE_ITER_INTENT); - old = bch2_btree_iter_peek_slot(&iter); ret = bkey_err(old); if (ret) - goto err; + return ret; if (ca->mi.freespace_initialized && - bch2_fs_inconsistent_on(old.k->type != old_type, c, - "incorrect key when %s %s btree (got %s should be %s)\n" + c->curr_recovery_pass > BCH_RECOVERY_PASS_check_alloc_info && + bch2_trans_inconsistent_on(old.k->type != old_type, trans, + "incorrect key when %s %s:%llu:%llu:0 (got %s should be %s)\n" " for %s", set ? "setting" : "clearing", bch2_btree_ids[btree], + iter.pos.inode, + iter.pos.offset, bch2_bkey_types[old.k->type], bch2_bkey_types[old_type], (bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf))) { @@ -438,74 +744,733 @@ err: return ret; } +static noinline int bch2_bucket_gen_update(struct btree_trans *trans, + struct bpos bucket, u8 gen) +{ + struct btree_iter iter; + unsigned offset; + struct bpos pos = alloc_gens_pos(bucket, &offset); + struct bkey_i_bucket_gens *g; + struct bkey_s_c k; + int ret; + + g = bch2_trans_kmalloc(trans, sizeof(*g)); + ret = PTR_ERR_OR_ZERO(g); + if (ret) + return ret; + + k = bch2_bkey_get_iter(trans, &iter, BTREE_ID_bucket_gens, pos, + BTREE_ITER_INTENT| + BTREE_ITER_WITH_UPDATES); + ret = bkey_err(k); + if (ret) + return ret; + + if (k.k->type != KEY_TYPE_bucket_gens) { + bkey_bucket_gens_init(&g->k_i); + g->k.p = iter.pos; + } else { + bkey_reassemble(&g->k_i, k); + } + + g->v.gens[offset] = gen; + + ret = bch2_trans_update(trans, &iter, &g->k_i, 0); + bch2_trans_iter_exit(trans, &iter); + return ret; +} + int bch2_trans_mark_alloc(struct btree_trans *trans, + enum btree_id btree_id, unsigned level, struct bkey_s_c old, struct bkey_i *new, unsigned flags) { struct bch_fs *c = trans->c; - struct bkey_alloc_unpacked old_u = bch2_alloc_unpack(old); - struct bkey_alloc_unpacked new_u = bch2_alloc_unpack(bkey_i_to_s_c(new)); + struct bch_alloc_v4 old_a_convert, *new_a; + const struct bch_alloc_v4 *old_a; u64 old_lru, new_lru; - bool need_repack = false; int ret = 0; - if (new_u.dirty_sectors > old_u.dirty_sectors || - new_u.cached_sectors > old_u.cached_sectors) { - new_u.read_time = max_t(u64, 1, atomic64_read(&c->io_clock[READ].now)); - new_u.write_time = max_t(u64, 1, atomic64_read(&c->io_clock[WRITE].now)); - new_u.need_inc_gen = true; - new_u.need_discard = true; - need_repack = true; + /* + * Deletion only happens in the device removal path, with + * BTREE_TRIGGER_NORUN: + */ + BUG_ON(new->k.type != KEY_TYPE_alloc_v4); + + old_a = bch2_alloc_to_v4(old, &old_a_convert); + new_a = &bkey_i_to_alloc_v4(new)->v; + + new_a->data_type = alloc_data_type(*new_a, new_a->data_type); + + if (new_a->dirty_sectors > old_a->dirty_sectors || + new_a->cached_sectors > old_a->cached_sectors) { + new_a->io_time[READ] = max_t(u64, 1, atomic64_read(&c->io_clock[READ].now)); + new_a->io_time[WRITE]= max_t(u64, 1, atomic64_read(&c->io_clock[WRITE].now)); + SET_BCH_ALLOC_V4_NEED_INC_GEN(new_a, true); + SET_BCH_ALLOC_V4_NEED_DISCARD(new_a, true); } - if (old_u.data_type && !new_u.data_type && - old_u.gen == new_u.gen && + if (data_type_is_empty(new_a->data_type) && + BCH_ALLOC_V4_NEED_INC_GEN(new_a) && !bch2_bucket_is_open_safe(c, new->k.p.inode, new->k.p.offset)) { - new_u.gen++; - new_u.need_inc_gen = false; - need_repack = true; + new_a->gen++; + SET_BCH_ALLOC_V4_NEED_INC_GEN(new_a, false); } - if (bucket_state(old_u) != bucket_state(new_u) || - (bucket_state(new_u) == BUCKET_free && - alloc_freespace_genbits(old_u) != alloc_freespace_genbits(new_u))) { - ret = bch2_bucket_do_index(trans, old, old_u, false) ?: - bch2_bucket_do_index(trans, bkey_i_to_s_c(new), new_u, true); + if (old_a->data_type != new_a->data_type || + (new_a->data_type == BCH_DATA_free && + alloc_freespace_genbits(*old_a) != alloc_freespace_genbits(*new_a))) { + ret = bch2_bucket_do_index(trans, old, old_a, false) ?: + bch2_bucket_do_index(trans, bkey_i_to_s_c(new), new_a, true); if (ret) return ret; } - old_lru = alloc_lru_idx(old_u); - new_lru = alloc_lru_idx(new_u); + if (new_a->data_type == BCH_DATA_cached && + !new_a->io_time[READ]) + new_a->io_time[READ] = max_t(u64, 1, atomic64_read(&c->io_clock[READ].now)); + + old_lru = alloc_lru_idx_read(*old_a); + new_lru = alloc_lru_idx_read(*new_a); + + if (old_lru != new_lru) { + ret = bch2_lru_change(trans, new->k.p.inode, + bucket_to_u64(new->k.p), + old_lru, new_lru); + if (ret) + return ret; + } + + new_a->fragmentation_lru = alloc_lru_idx_fragmentation(*new_a, + bch_dev_bkey_exists(c, new->k.p.inode)); + + if (old_a->fragmentation_lru != new_a->fragmentation_lru) { + ret = bch2_lru_change(trans, + BCH_LRU_FRAGMENTATION_START, + bucket_to_u64(new->k.p), + old_a->fragmentation_lru, new_a->fragmentation_lru); + if (ret) + return ret; + } + + if (old_a->gen != new_a->gen) { + ret = bch2_bucket_gen_update(trans, new->k.p, new_a->gen); + if (ret) + return ret; + } + + return 0; +} + +/* + * This synthesizes deleted extents for holes, similar to BTREE_ITER_SLOTS for + * extents style btrees, but works on non-extents btrees: + */ +static struct bkey_s_c bch2_get_key_or_hole(struct btree_iter *iter, struct bpos end, struct bkey *hole) +{ + struct bkey_s_c k = bch2_btree_iter_peek_slot(iter); + + if (bkey_err(k)) + return k; + + if (k.k->type) { + return k; + } else { + struct btree_iter iter2; + struct bpos next; + + bch2_trans_copy_iter(&iter2, iter); + + if (!bpos_eq(iter->path->l[0].b->key.k.p, SPOS_MAX)) + end = bkey_min(end, bpos_nosnap_successor(iter->path->l[0].b->key.k.p)); + + end = bkey_min(end, POS(iter->pos.inode, iter->pos.offset + U32_MAX - 1)); + + /* + * btree node min/max is a closed interval, upto takes a half + * open interval: + */ + k = bch2_btree_iter_peek_upto(&iter2, end); + next = iter2.pos; + bch2_trans_iter_exit(iter->trans, &iter2); + + BUG_ON(next.offset >= iter->pos.offset + U32_MAX); + + if (bkey_err(k)) + return k; + + bkey_init(hole); + hole->p = iter->pos; + + bch2_key_resize(hole, next.offset - iter->pos.offset); + return (struct bkey_s_c) { hole, NULL }; + } +} + +static bool next_bucket(struct bch_fs *c, struct bpos *bucket) +{ + struct bch_dev *ca; + unsigned iter; + + if (bch2_dev_bucket_exists(c, *bucket)) + return true; + + if (bch2_dev_exists2(c, bucket->inode)) { + ca = bch_dev_bkey_exists(c, bucket->inode); + + if (bucket->offset < ca->mi.first_bucket) { + bucket->offset = ca->mi.first_bucket; + return true; + } + + bucket->inode++; + bucket->offset = 0; + } + + rcu_read_lock(); + iter = bucket->inode; + ca = __bch2_next_dev(c, &iter, NULL); + if (ca) + *bucket = POS(ca->dev_idx, ca->mi.first_bucket); + rcu_read_unlock(); + + return ca != NULL; +} + +static struct bkey_s_c bch2_get_key_or_real_bucket_hole(struct btree_iter *iter, struct bkey *hole) +{ + struct bch_fs *c = iter->trans->c; + struct bkey_s_c k; +again: + k = bch2_get_key_or_hole(iter, POS_MAX, hole); + if (bkey_err(k)) + return k; + + if (!k.k->type) { + struct bpos bucket = bkey_start_pos(k.k); + + if (!bch2_dev_bucket_exists(c, bucket)) { + if (!next_bucket(c, &bucket)) + return bkey_s_c_null; + + bch2_btree_iter_set_pos(iter, bucket); + goto again; + } + + if (!bch2_dev_bucket_exists(c, k.k->p)) { + struct bch_dev *ca = bch_dev_bkey_exists(c, bucket.inode); + + bch2_key_resize(hole, ca->mi.nbuckets - bucket.offset); + } + } + + return k; +} + +static noinline_for_stack +int bch2_check_alloc_key(struct btree_trans *trans, + struct bkey_s_c alloc_k, + struct btree_iter *alloc_iter, + struct btree_iter *discard_iter, + struct btree_iter *freespace_iter, + struct btree_iter *bucket_gens_iter) +{ + struct bch_fs *c = trans->c; + struct bch_dev *ca; + struct bch_alloc_v4 a_convert; + const struct bch_alloc_v4 *a; + unsigned discard_key_type, freespace_key_type; + unsigned gens_offset; + struct bkey_s_c k; + struct printbuf buf = PRINTBUF; + int ret; + + if (fsck_err_on(!bch2_dev_bucket_exists(c, alloc_k.k->p), c, + "alloc key for invalid device:bucket %llu:%llu", + alloc_k.k->p.inode, alloc_k.k->p.offset)) + return bch2_btree_delete_at(trans, alloc_iter, 0); + + ca = bch_dev_bkey_exists(c, alloc_k.k->p.inode); + if (!ca->mi.freespace_initialized) + return 0; + + a = bch2_alloc_to_v4(alloc_k, &a_convert); + + discard_key_type = a->data_type == BCH_DATA_need_discard ? KEY_TYPE_set : 0; + bch2_btree_iter_set_pos(discard_iter, alloc_k.k->p); + k = bch2_btree_iter_peek_slot(discard_iter); + ret = bkey_err(k); + if (ret) + goto err; + + if (k.k->type != discard_key_type && + (c->opts.reconstruct_alloc || + fsck_err(c, "incorrect key in need_discard btree (got %s should be %s)\n" + " %s", + bch2_bkey_types[k.k->type], + bch2_bkey_types[discard_key_type], + (bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf)))) { + struct bkey_i *update = + bch2_trans_kmalloc(trans, sizeof(*update)); + + ret = PTR_ERR_OR_ZERO(update); + if (ret) + goto err; + + bkey_init(&update->k); + update->k.type = discard_key_type; + update->k.p = discard_iter->pos; + + ret = bch2_trans_update(trans, discard_iter, update, 0); + if (ret) + goto err; + } + + freespace_key_type = a->data_type == BCH_DATA_free ? KEY_TYPE_set : 0; + bch2_btree_iter_set_pos(freespace_iter, alloc_freespace_pos(alloc_k.k->p, *a)); + k = bch2_btree_iter_peek_slot(freespace_iter); + ret = bkey_err(k); + if (ret) + goto err; + + if (k.k->type != freespace_key_type && + (c->opts.reconstruct_alloc || + fsck_err(c, "incorrect key in freespace btree (got %s should be %s)\n" + " %s", + bch2_bkey_types[k.k->type], + bch2_bkey_types[freespace_key_type], + (printbuf_reset(&buf), + bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf)))) { + struct bkey_i *update = + bch2_trans_kmalloc(trans, sizeof(*update)); + + ret = PTR_ERR_OR_ZERO(update); + if (ret) + goto err; + + bkey_init(&update->k); + update->k.type = freespace_key_type; + update->k.p = freespace_iter->pos; + bch2_key_resize(&update->k, 1); + + ret = bch2_trans_update(trans, freespace_iter, update, 0); + if (ret) + goto err; + } + + bch2_btree_iter_set_pos(bucket_gens_iter, alloc_gens_pos(alloc_k.k->p, &gens_offset)); + k = bch2_btree_iter_peek_slot(bucket_gens_iter); + ret = bkey_err(k); + if (ret) + goto err; + + if (a->gen != alloc_gen(k, gens_offset) && + (c->opts.reconstruct_alloc || + fsck_err(c, "incorrect gen in bucket_gens btree (got %u should be %u)\n" + " %s", + alloc_gen(k, gens_offset), a->gen, + (printbuf_reset(&buf), + bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf)))) { + struct bkey_i_bucket_gens *g = + bch2_trans_kmalloc(trans, sizeof(*g)); + + ret = PTR_ERR_OR_ZERO(g); + if (ret) + goto err; + + if (k.k->type == KEY_TYPE_bucket_gens) { + bkey_reassemble(&g->k_i, k); + } else { + bkey_bucket_gens_init(&g->k_i); + g->k.p = alloc_gens_pos(alloc_k.k->p, &gens_offset); + } + + g->v.gens[gens_offset] = a->gen; + + ret = bch2_trans_update(trans, bucket_gens_iter, &g->k_i, 0); + if (ret) + goto err; + } +err: +fsck_err: + printbuf_exit(&buf); + return ret; +} + +static noinline_for_stack +int bch2_check_alloc_hole_freespace(struct btree_trans *trans, + struct bpos start, + struct bpos *end, + struct btree_iter *freespace_iter) +{ + struct bch_fs *c = trans->c; + struct bch_dev *ca; + struct bkey_s_c k; + struct printbuf buf = PRINTBUF; + int ret; + + ca = bch_dev_bkey_exists(c, start.inode); + if (!ca->mi.freespace_initialized) + return 0; + + bch2_btree_iter_set_pos(freespace_iter, start); + + k = bch2_btree_iter_peek_slot(freespace_iter); + ret = bkey_err(k); + if (ret) + goto err; + + *end = bkey_min(k.k->p, *end); + + if (k.k->type != KEY_TYPE_set && + (c->opts.reconstruct_alloc || + fsck_err(c, "hole in alloc btree missing in freespace btree\n" + " device %llu buckets %llu-%llu", + freespace_iter->pos.inode, + freespace_iter->pos.offset, + end->offset))) { + struct bkey_i *update = + bch2_trans_kmalloc(trans, sizeof(*update)); + + ret = PTR_ERR_OR_ZERO(update); + if (ret) + goto err; + + bkey_init(&update->k); + update->k.type = KEY_TYPE_set; + update->k.p = freespace_iter->pos; + bch2_key_resize(&update->k, + min_t(u64, U32_MAX, end->offset - + freespace_iter->pos.offset)); + + ret = bch2_trans_update(trans, freespace_iter, update, 0); + if (ret) + goto err; + } +err: +fsck_err: + printbuf_exit(&buf); + return ret; +} + +static noinline_for_stack +int bch2_check_alloc_hole_bucket_gens(struct btree_trans *trans, + struct bpos start, + struct bpos *end, + struct btree_iter *bucket_gens_iter) +{ + struct bch_fs *c = trans->c; + struct bkey_s_c k; + struct printbuf buf = PRINTBUF; + unsigned i, gens_offset, gens_end_offset; + int ret; + + if (c->sb.version < bcachefs_metadata_version_bucket_gens) + return 0; + + bch2_btree_iter_set_pos(bucket_gens_iter, alloc_gens_pos(start, &gens_offset)); + + k = bch2_btree_iter_peek_slot(bucket_gens_iter); + ret = bkey_err(k); + if (ret) + goto err; + + if (bkey_cmp(alloc_gens_pos(start, &gens_offset), + alloc_gens_pos(*end, &gens_end_offset))) + gens_end_offset = KEY_TYPE_BUCKET_GENS_NR; + + if (k.k->type == KEY_TYPE_bucket_gens) { + struct bkey_i_bucket_gens g; + bool need_update = false; + + bkey_reassemble(&g.k_i, k); + + for (i = gens_offset; i < gens_end_offset; i++) { + if (fsck_err_on(g.v.gens[i], c, + "hole in alloc btree at %llu:%llu with nonzero gen in bucket_gens btree (%u)", + bucket_gens_pos_to_alloc(k.k->p, i).inode, + bucket_gens_pos_to_alloc(k.k->p, i).offset, + g.v.gens[i])) { + g.v.gens[i] = 0; + need_update = true; + } + } + + if (need_update) { + struct bkey_i *u = bch2_trans_kmalloc(trans, sizeof(g)); + + ret = PTR_ERR_OR_ZERO(u); + if (ret) + goto err; + + memcpy(u, &g, sizeof(g)); + + ret = bch2_trans_update(trans, bucket_gens_iter, u, 0); + if (ret) + goto err; + } + } + + *end = bkey_min(*end, bucket_gens_pos_to_alloc(bpos_nosnap_successor(k.k->p), 0)); +err: +fsck_err: + printbuf_exit(&buf); + return ret; +} + +static noinline_for_stack int __bch2_check_discard_freespace_key(struct btree_trans *trans, + struct btree_iter *iter) +{ + struct bch_fs *c = trans->c; + struct btree_iter alloc_iter; + struct bkey_s_c alloc_k; + struct bch_alloc_v4 a_convert; + const struct bch_alloc_v4 *a; + u64 genbits; + struct bpos pos; + enum bch_data_type state = iter->btree_id == BTREE_ID_need_discard + ? BCH_DATA_need_discard + : BCH_DATA_free; + struct printbuf buf = PRINTBUF; + int ret; + + pos = iter->pos; + pos.offset &= ~(~0ULL << 56); + genbits = iter->pos.offset & (~0ULL << 56); + + alloc_k = bch2_bkey_get_iter(trans, &alloc_iter, BTREE_ID_alloc, pos, 0); + ret = bkey_err(alloc_k); + if (ret) + return ret; + + if (fsck_err_on(!bch2_dev_bucket_exists(c, pos), c, + "entry in %s btree for nonexistant dev:bucket %llu:%llu", + bch2_btree_ids[iter->btree_id], pos.inode, pos.offset)) + goto delete; + + a = bch2_alloc_to_v4(alloc_k, &a_convert); + + if (fsck_err_on(a->data_type != state || + (state == BCH_DATA_free && + genbits != alloc_freespace_genbits(*a)), c, + "%s\n incorrectly set at %s:%llu:%llu:0 (free %u, genbits %llu should be %llu)", + (bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf), + bch2_btree_ids[iter->btree_id], + iter->pos.inode, + iter->pos.offset, + a->data_type == state, + genbits >> 56, alloc_freespace_genbits(*a) >> 56)) + goto delete; +out: +fsck_err: + set_btree_iter_dontneed(&alloc_iter); + bch2_trans_iter_exit(trans, &alloc_iter); + printbuf_exit(&buf); + return ret; +delete: + ret = bch2_btree_delete_extent_at(trans, iter, + iter->btree_id == BTREE_ID_freespace ? 1 : 0, 0) ?: + bch2_trans_commit(trans, NULL, NULL, + BTREE_INSERT_NOFAIL|BTREE_INSERT_LAZY_RW); + goto out; +} + +static int bch2_check_discard_freespace_key(struct btree_trans *trans, + struct btree_iter *iter, + struct bpos end) +{ + if (!btree_id_is_extents(iter->btree_id)) { + return __bch2_check_discard_freespace_key(trans, iter); + } else { + int ret = 0; + + while (!bkey_eq(iter->pos, end) && + !(ret = btree_trans_too_many_iters(trans) ?: + __bch2_check_discard_freespace_key(trans, iter))) + bch2_btree_iter_set_pos(iter, bpos_nosnap_successor(iter->pos)); + + return ret; + } +} + +/* + * We've already checked that generation numbers in the bucket_gens btree are + * valid for buckets that exist; this just checks for keys for nonexistent + * buckets. + */ +static noinline_for_stack +int bch2_check_bucket_gens_key(struct btree_trans *trans, + struct btree_iter *iter, + struct bkey_s_c k) +{ + struct bch_fs *c = trans->c; + struct bkey_i_bucket_gens g; + struct bch_dev *ca; + u64 start = bucket_gens_pos_to_alloc(k.k->p, 0).offset; + u64 end = bucket_gens_pos_to_alloc(bpos_nosnap_successor(k.k->p), 0).offset; + u64 b; + bool need_update = false, dev_exists; + struct printbuf buf = PRINTBUF; + int ret = 0; + + BUG_ON(k.k->type != KEY_TYPE_bucket_gens); + bkey_reassemble(&g.k_i, k); + + /* if no bch_dev, skip out whether we repair or not */ + dev_exists = bch2_dev_exists2(c, k.k->p.inode); + if (!dev_exists) { + if (fsck_err_on(!dev_exists, c, + "bucket_gens key for invalid device:\n %s", + (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { + ret = bch2_btree_delete_at(trans, iter, 0); + } + goto out; + } + + ca = bch_dev_bkey_exists(c, k.k->p.inode); + if (fsck_err_on(end <= ca->mi.first_bucket || + start >= ca->mi.nbuckets, c, + "bucket_gens key for invalid buckets:\n %s", + (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { + ret = bch2_btree_delete_at(trans, iter, 0); + goto out; + } + + for (b = start; b < ca->mi.first_bucket; b++) + if (fsck_err_on(g.v.gens[b & KEY_TYPE_BUCKET_GENS_MASK], c, + "bucket_gens key has nonzero gen for invalid bucket")) { + g.v.gens[b & KEY_TYPE_BUCKET_GENS_MASK] = 0; + need_update = true; + } + + for (b = ca->mi.nbuckets; b < end; b++) + if (fsck_err_on(g.v.gens[b & KEY_TYPE_BUCKET_GENS_MASK], c, + "bucket_gens key has nonzero gen for invalid bucket")) { + g.v.gens[b & KEY_TYPE_BUCKET_GENS_MASK] = 0; + need_update = true; + } + + if (need_update) { + struct bkey_i *u = bch2_trans_kmalloc(trans, sizeof(g)); + + ret = PTR_ERR_OR_ZERO(u); + if (ret) + goto out; + + memcpy(u, &g, sizeof(g)); + ret = bch2_trans_update(trans, iter, u, 0); + } +out: +fsck_err: + printbuf_exit(&buf); + return ret; +} + +int bch2_check_alloc_info(struct bch_fs *c) +{ + struct btree_trans *trans = bch2_trans_get(c); + struct btree_iter iter, discard_iter, freespace_iter, bucket_gens_iter; + struct bkey hole; + struct bkey_s_c k; + int ret = 0; + + bch2_trans_iter_init(trans, &iter, BTREE_ID_alloc, POS_MIN, + BTREE_ITER_PREFETCH); + bch2_trans_iter_init(trans, &discard_iter, BTREE_ID_need_discard, POS_MIN, + BTREE_ITER_PREFETCH); + bch2_trans_iter_init(trans, &freespace_iter, BTREE_ID_freespace, POS_MIN, + BTREE_ITER_PREFETCH); + bch2_trans_iter_init(trans, &bucket_gens_iter, BTREE_ID_bucket_gens, POS_MIN, + BTREE_ITER_PREFETCH); + + while (1) { + struct bpos next; + + bch2_trans_begin(trans); + + k = bch2_get_key_or_real_bucket_hole(&iter, &hole); + ret = bkey_err(k); + if (ret) + goto bkey_err; + + if (!k.k) + break; + + if (k.k->type) { + next = bpos_nosnap_successor(k.k->p); - if (old_lru != new_lru) { - ret = bch2_lru_change(trans, new->k.p.inode, new->k.p.offset, - old_lru, &new_lru); + ret = bch2_check_alloc_key(trans, + k, &iter, + &discard_iter, + &freespace_iter, + &bucket_gens_iter); + if (ret) + goto bkey_err; + } else { + next = k.k->p; + + ret = bch2_check_alloc_hole_freespace(trans, + bkey_start_pos(k.k), + &next, + &freespace_iter) ?: + bch2_check_alloc_hole_bucket_gens(trans, + bkey_start_pos(k.k), + &next, + &bucket_gens_iter); + if (ret) + goto bkey_err; + } + + ret = bch2_trans_commit(trans, NULL, NULL, + BTREE_INSERT_NOFAIL| + BTREE_INSERT_LAZY_RW); if (ret) - return ret; + goto bkey_err; - if (new_lru && new_u.read_time != new_lru) { - new_u.read_time = new_lru; - need_repack = true; - } + bch2_btree_iter_set_pos(&iter, next); +bkey_err: + if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) + continue; + if (ret) + break; } + bch2_trans_iter_exit(trans, &bucket_gens_iter); + bch2_trans_iter_exit(trans, &freespace_iter); + bch2_trans_iter_exit(trans, &discard_iter); + bch2_trans_iter_exit(trans, &iter); - if (need_repack && !bkey_deleted(&new->k)) - bch2_alloc_pack_v3((void *) new, new_u); + if (ret < 0) + goto err; - return 0; + ret = for_each_btree_key2(trans, iter, + BTREE_ID_need_discard, POS_MIN, + BTREE_ITER_PREFETCH, k, + bch2_check_discard_freespace_key(trans, &iter, k.k->p)) ?: + for_each_btree_key2(trans, iter, + BTREE_ID_freespace, POS_MIN, + BTREE_ITER_PREFETCH, k, + bch2_check_discard_freespace_key(trans, &iter, k.k->p)) ?: + for_each_btree_key_commit(trans, iter, + BTREE_ID_bucket_gens, POS_MIN, + BTREE_ITER_PREFETCH, k, + NULL, NULL, BTREE_INSERT_NOFAIL|BTREE_INSERT_LAZY_RW, + bch2_check_bucket_gens_key(trans, &iter, k)); +err: + bch2_trans_put(trans); + if (ret) + bch_err_fn(c, ret); + return ret; } -static int bch2_check_alloc_key(struct btree_trans *trans, - struct btree_iter *alloc_iter) +static int bch2_check_alloc_to_lru_ref(struct btree_trans *trans, + struct btree_iter *alloc_iter) { struct bch_fs *c = trans->c; - struct btree_iter discard_iter, freespace_iter, lru_iter; - struct bkey_alloc_unpacked a; - unsigned discard_key_type, freespace_key_type; - struct bkey_s_c alloc_k, k; + struct btree_iter lru_iter; + struct bch_alloc_v4 a_convert; + const struct bch_alloc_v4 *a; + struct bkey_s_c alloc_k, lru_k; struct printbuf buf = PRINTBUF; - struct printbuf buf2 = PRINTBUF; int ret; alloc_k = bch2_btree_iter_peek(alloc_iter); @@ -516,115 +1481,49 @@ static int bch2_check_alloc_key(struct btree_trans *trans, if (ret) return ret; - a = bch2_alloc_unpack(alloc_k); - discard_key_type = bucket_state(a) == BUCKET_need_discard - ? KEY_TYPE_set : 0; - freespace_key_type = bucket_state(a) == BUCKET_free - ? KEY_TYPE_set : 0; + a = bch2_alloc_to_v4(alloc_k, &a_convert); - bch2_trans_iter_init(trans, &discard_iter, BTREE_ID_need_discard, - alloc_k.k->p, 0); - bch2_trans_iter_init(trans, &freespace_iter, BTREE_ID_freespace, - alloc_freespace_pos(a), 0); - bch2_trans_iter_init(trans, &lru_iter, BTREE_ID_lru, - POS(a.dev, a.read_time), 0); + if (a->data_type != BCH_DATA_cached) + return 0; - k = bch2_btree_iter_peek_slot(&discard_iter); - ret = bkey_err(k); + lru_k = bch2_bkey_get_iter(trans, &lru_iter, BTREE_ID_lru, + lru_pos(alloc_k.k->p.inode, + bucket_to_u64(alloc_k.k->p), + a->io_time[READ]), 0); + ret = bkey_err(lru_k); if (ret) - goto err; + return ret; - if (fsck_err_on(k.k->type != discard_key_type, c, - "incorrect key in need_discard btree (got %s should be %s)\n" + if (fsck_err_on(!a->io_time[READ], c, + "cached bucket with read_time 0\n" " %s", - bch2_bkey_types[k.k->type], - bch2_bkey_types[discard_key_type], - (bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf))) { - struct bkey_i *update = - bch2_trans_kmalloc(trans, sizeof(*update)); - - ret = PTR_ERR_OR_ZERO(update); - if (ret) - goto err; - - bkey_init(&update->k); - update->k.type = discard_key_type; - update->k.p = discard_iter.pos; - - ret = bch2_trans_update(trans, &discard_iter, update, 0) ?: - bch2_trans_commit(trans, NULL, NULL, 0); - if (ret) - goto err; - } - - k = bch2_btree_iter_peek_slot(&freespace_iter); - ret = bkey_err(k); - if (ret) - goto err; - - if (fsck_err_on(k.k->type != freespace_key_type, c, - "incorrect key in freespace btree (got %s should be %s)\n" + (printbuf_reset(&buf), + bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf)) || + fsck_err_on(lru_k.k->type != KEY_TYPE_set, c, + "missing lru entry\n" " %s", - bch2_bkey_types[k.k->type], - bch2_bkey_types[freespace_key_type], (printbuf_reset(&buf), bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf))) { - struct bkey_i *update = - bch2_trans_kmalloc(trans, sizeof(*update)); - - ret = PTR_ERR_OR_ZERO(update); - if (ret) - goto err; - - bkey_init(&update->k); - update->k.type = freespace_key_type; - update->k.p = freespace_iter.pos; - bch2_key_resize(&update->k, 1); + u64 read_time = a->io_time[READ] ?: + atomic64_read(&c->io_clock[READ].now); - ret = bch2_trans_update(trans, &freespace_iter, update, 0) ?: - bch2_trans_commit(trans, NULL, NULL, 0); + ret = bch2_lru_set(trans, + alloc_k.k->p.inode, + bucket_to_u64(alloc_k.k->p), + read_time); if (ret) goto err; - } - - if (bucket_state(a) == BUCKET_cached) { - if (fsck_err_on(!a.read_time, c, - "cached bucket with read_time 0\n" - " %s", - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf))) { - - a.read_time = atomic64_read(&c->io_clock[READ].now); - ret = bch2_lru_change(trans, a.dev, a.bucket, - 0, &a.read_time) ?: - bch2_alloc_write(trans, alloc_iter, &a, BTREE_TRIGGER_NORUN); - bch2_trans_commit(trans, NULL, NULL, 0); + if (a->io_time[READ] != read_time) { + struct bkey_i_alloc_v4 *a_mut = + bch2_alloc_to_v4_mut(trans, alloc_k); + ret = PTR_ERR_OR_ZERO(a_mut); if (ret) goto err; - } - - k = bch2_btree_iter_peek_slot(&lru_iter); - ret = bkey_err(k); - if (ret) - goto err; - if (fsck_err_on(k.k->type != KEY_TYPE_lru || - le64_to_cpu(bkey_s_c_to_lru(k).v->idx) != a.bucket, c, - "incorrect/missing lru entry\n" - " %s\n" - " %s", - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, alloc_k), buf.buf), - (bch2_bkey_val_to_text(&buf2, c, k), buf2.buf))) { - u64 read_time = a.read_time; - - ret = bch2_lru_change(trans, a.dev, a.bucket, - 0, &a.read_time) ?: - (a.read_time != read_time - ? bch2_alloc_write(trans, alloc_iter, &a, BTREE_TRIGGER_NORUN) - : 0) ?: - bch2_trans_commit(trans, NULL, NULL, 0); + a_mut->v.io_time[READ] = read_time; + ret = bch2_trans_update(trans, alloc_iter, + &a_mut->k_i, BTREE_TRIGGER_NORUN); if (ret) goto err; } @@ -632,165 +1531,106 @@ static int bch2_check_alloc_key(struct btree_trans *trans, err: fsck_err: bch2_trans_iter_exit(trans, &lru_iter); - bch2_trans_iter_exit(trans, &freespace_iter); - bch2_trans_iter_exit(trans, &discard_iter); - printbuf_exit(&buf2); printbuf_exit(&buf); return ret; } -static inline bool bch2_dev_bucket_exists(struct bch_fs *c, struct bpos pos) -{ - struct bch_dev *ca; - - if (pos.inode >= c->sb.nr_devices || !c->devs[pos.inode]) - return false; - - ca = bch_dev_bkey_exists(c, pos.inode); - return pos.offset >= ca->mi.first_bucket && - pos.offset < ca->mi.nbuckets; -} - -static int bch2_check_freespace_key(struct btree_trans *trans, - struct btree_iter *freespace_iter, - bool initial) +int bch2_check_alloc_to_lru_refs(struct bch_fs *c) { - struct bch_fs *c = trans->c; - struct btree_iter alloc_iter; - struct bkey_s_c k, freespace_k; - struct bkey_alloc_unpacked a; - u64 genbits; - struct bpos pos; - struct bkey_i *update; - struct printbuf buf = PRINTBUF; - int ret; - - freespace_k = bch2_btree_iter_peek(freespace_iter); - if (!freespace_k.k) - return 1; - - ret = bkey_err(freespace_k); - if (ret) - return ret; - - pos = freespace_iter->pos; - pos.offset &= ~(~0ULL << 56); - genbits = freespace_iter->pos.offset & (~0ULL << 56); - - bch2_trans_iter_init(trans, &alloc_iter, BTREE_ID_alloc, pos, 0); - - if (fsck_err_on(!bch2_dev_bucket_exists(c, pos), c, - "%llu:%llu set in freespace btree but device or bucket does not exist", - pos.inode, pos.offset)) - goto delete; + struct btree_iter iter; + struct bkey_s_c k; + int ret = 0; - k = bch2_btree_iter_peek_slot(&alloc_iter); - ret = bkey_err(k); + ret = bch2_trans_run(c, + for_each_btree_key_commit(trans, iter, BTREE_ID_alloc, + POS_MIN, BTREE_ITER_PREFETCH, k, + NULL, NULL, BTREE_INSERT_NOFAIL|BTREE_INSERT_LAZY_RW, + bch2_check_alloc_to_lru_ref(trans, &iter))); if (ret) - goto err; - - a = bch2_alloc_unpack(k); - - if (fsck_err_on(bucket_state(a) != BUCKET_free || - genbits != alloc_freespace_genbits(a), c, - "%s\n incorrectly set in freespace index (free %u, genbits %llu should be %llu)", - (bch2_bkey_val_to_text(&buf, c, k), buf.buf), - bucket_state(a) == BUCKET_free, - genbits >> 56, alloc_freespace_genbits(a) >> 56)) - goto delete; -out: -err: -fsck_err: - bch2_trans_iter_exit(trans, &alloc_iter); - printbuf_exit(&buf); + bch_err_fn(c, ret); return ret; -delete: - update = bch2_trans_kmalloc(trans, sizeof(*update)); - ret = PTR_ERR_OR_ZERO(update); - if (ret) - goto err; - - bkey_init(&update->k); - update->k.p = freespace_iter->pos; - bch2_key_resize(&update->k, 1); - - ret = bch2_trans_update(trans, freespace_iter, update, 0) ?: - bch2_trans_commit(trans, NULL, NULL, 0); - goto out; } -int bch2_check_alloc_info(struct bch_fs *c, bool initial) +static int bch2_discard_one_bucket(struct btree_trans *trans, + struct btree_iter *need_discard_iter, + struct bpos *discard_pos_done, + u64 *seen, + u64 *open, + u64 *need_journal_commit, + u64 *discarded) { - struct btree_trans trans; - struct btree_iter iter; + struct bch_fs *c = trans->c; + struct bpos pos = need_discard_iter->pos; + struct btree_iter iter = { NULL }; struct bkey_s_c k; + struct bch_dev *ca; + struct bkey_i_alloc_v4 *a; + struct printbuf buf = PRINTBUF; int ret = 0; - bch2_trans_init(&trans, c, 0, 0); - - for_each_btree_key(&trans, iter, BTREE_ID_alloc, POS_MIN, - BTREE_ITER_PREFETCH, k, ret) { - ret = __bch2_trans_do(&trans, NULL, NULL, 0, - bch2_check_alloc_key(&trans, &iter)); - if (ret) - break; + ca = bch_dev_bkey_exists(c, pos.inode); + if (!percpu_ref_tryget(&ca->io_ref)) { + bch2_btree_iter_set_pos(need_discard_iter, POS(pos.inode + 1, 0)); + return 0; } - bch2_trans_iter_exit(&trans, &iter); - - if (ret) - goto err; - - bch2_trans_iter_init(&trans, &iter, BTREE_ID_freespace, POS_MIN, - BTREE_ITER_PREFETCH); - while (1) { - ret = __bch2_trans_do(&trans, NULL, NULL, 0, - bch2_check_freespace_key(&trans, &iter, initial)); - if (ret) - break; - bch2_btree_iter_set_pos(&iter, bpos_nosnap_successor(iter.pos)); + if (bch2_bucket_is_open_safe(c, pos.inode, pos.offset)) { + (*open)++; + goto out; } - bch2_trans_iter_exit(&trans, &iter); -err: - bch2_trans_exit(&trans); - return ret < 0 ? ret : 0; -} -static int bch2_clear_need_discard(struct btree_trans *trans, struct bpos pos, - struct bch_dev *ca, bool *discard_done) -{ - struct bch_fs *c = trans->c; - struct btree_iter iter; - struct bkey_s_c k; - struct bkey_alloc_unpacked a; - struct printbuf buf = PRINTBUF; - int ret; + if (bch2_bucket_needs_journal_commit(&c->buckets_waiting_for_journal, + c->journal.flushed_seq_ondisk, + pos.inode, pos.offset)) { + (*need_journal_commit)++; + goto out; + } - bch2_trans_iter_init(trans, &iter, BTREE_ID_alloc, pos, - BTREE_ITER_CACHED); - k = bch2_btree_iter_peek_slot(&iter); + k = bch2_bkey_get_iter(trans, &iter, BTREE_ID_alloc, + need_discard_iter->pos, + BTREE_ITER_CACHED); ret = bkey_err(k); if (ret) goto out; - a = bch2_alloc_unpack(k); + a = bch2_alloc_to_v4_mut(trans, k); + ret = PTR_ERR_OR_ZERO(a); + if (ret) + goto out; - if (a.need_inc_gen) { - a.gen++; - a.need_inc_gen = false; + if (BCH_ALLOC_V4_NEED_INC_GEN(&a->v)) { + a->v.gen++; + SET_BCH_ALLOC_V4_NEED_INC_GEN(&a->v, false); goto write; } - BUG_ON(a.journal_seq > c->journal.flushed_seq_ondisk); + if (a->v.journal_seq > c->journal.flushed_seq_ondisk) { + if (c->curr_recovery_pass > BCH_RECOVERY_PASS_check_alloc_info) { + bch2_trans_inconsistent(trans, + "clearing need_discard but journal_seq %llu > flushed_seq %llu\n" + "%s", + a->v.journal_seq, + c->journal.flushed_seq_ondisk, + (bch2_bkey_val_to_text(&buf, c, k), buf.buf)); + ret = -EIO; + } + goto out; + } + + if (a->v.data_type != BCH_DATA_need_discard) { + if (c->curr_recovery_pass > BCH_RECOVERY_PASS_check_alloc_info) { + bch2_trans_inconsistent(trans, + "bucket incorrectly set in need_discard btree\n" + "%s", + (bch2_bkey_val_to_text(&buf, c, k), buf.buf)); + ret = -EIO; + } - if (bch2_fs_inconsistent_on(!a.need_discard, c, - "%s\n incorrectly set in need_discard btree", - (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { - ret = -EIO; goto out; } - if (!*discard_done && ca->mi.discard && !c->opts.nochanges) { + if (!bkey_eq(*discard_pos_done, iter.pos) && + ca->mi.discard && !c->opts.nochanges) { /* * This works without any other locks because this is the only * thread that removes items from the need_discard tree @@ -799,19 +1639,30 @@ static int bch2_clear_need_discard(struct btree_trans *trans, struct bpos pos, blkdev_issue_discard(ca->disk_sb.bdev, k.k->p.offset * ca->mi.bucket_size, ca->mi.bucket_size, - GFP_KERNEL, 0); - *discard_done = true; + GFP_KERNEL); + *discard_pos_done = iter.pos; - ret = bch2_trans_relock(trans); + ret = bch2_trans_relock_notrace(trans); if (ret) goto out; } - a.need_discard = false; + SET_BCH_ALLOC_V4_NEED_DISCARD(&a->v, false); + a->v.data_type = alloc_data_type(a->v, a->v.data_type); write: - ret = bch2_alloc_write(trans, &iter, &a, 0); + ret = bch2_trans_update(trans, &iter, &a->k_i, 0) ?: + bch2_trans_commit(trans, NULL, NULL, + BCH_WATERMARK_btree| + BTREE_INSERT_NOFAIL); + if (ret) + goto out; + + this_cpu_inc(c->counters[BCH_COUNTER_bucket_discard]); + (*discarded)++; out: + (*seen)++; bch2_trans_iter_exit(trans, &iter); + percpu_ref_put(&ca->io_ref); printbuf_exit(&buf); return ret; } @@ -819,174 +1670,254 @@ out: static void bch2_do_discards_work(struct work_struct *work) { struct bch_fs *c = container_of(work, struct bch_fs, discard_work); - struct bch_dev *ca = NULL; - struct btree_trans trans; struct btree_iter iter; struct bkey_s_c k; + u64 seen = 0, open = 0, need_journal_commit = 0, discarded = 0; + struct bpos discard_pos_done = POS_MAX; int ret; - bch2_trans_init(&trans, c, 0, 0); - - for_each_btree_key(&trans, iter, BTREE_ID_need_discard, - POS_MIN, 0, k, ret) { - bool discard_done = false; - - if (ca && k.k->p.inode != ca->dev_idx) { - percpu_ref_put(&ca->io_ref); - ca = NULL; - } - - if (!ca) { - ca = bch_dev_bkey_exists(c, k.k->p.inode); - if (!percpu_ref_tryget(&ca->io_ref)) { - ca = NULL; - bch2_btree_iter_set_pos(&iter, POS(k.k->p.inode + 1, 0)); - continue; - } - } - - if (bch2_bucket_needs_journal_commit(&c->buckets_waiting_for_journal, - c->journal.flushed_seq_ondisk, - k.k->p.inode, k.k->p.offset) || - bch2_bucket_is_open_safe(c, k.k->p.inode, k.k->p.offset)) - continue; - - ret = __bch2_trans_do(&trans, NULL, NULL, 0, - bch2_clear_need_discard(&trans, k.k->p, ca, &discard_done)); - if (ret) - break; - } - bch2_trans_iter_exit(&trans, &iter); - - if (ca) - percpu_ref_put(&ca->io_ref); - - bch2_trans_exit(&trans); - percpu_ref_put(&c->writes); + /* + * We're doing the commit in bch2_discard_one_bucket instead of using + * for_each_btree_key_commit() so that we can increment counters after + * successful commit: + */ + ret = bch2_trans_run(c, + for_each_btree_key2(trans, iter, + BTREE_ID_need_discard, POS_MIN, 0, k, + bch2_discard_one_bucket(trans, &iter, &discard_pos_done, + &seen, + &open, + &need_journal_commit, + &discarded))); + + if (need_journal_commit * 2 > seen) + bch2_journal_flush_async(&c->journal, NULL); + + bch2_write_ref_put(c, BCH_WRITE_REF_discard); + + trace_discard_buckets(c, seen, open, need_journal_commit, discarded, + bch2_err_str(ret)); } void bch2_do_discards(struct bch_fs *c) { - if (percpu_ref_tryget(&c->writes) && - !queue_work(system_long_wq, &c->discard_work)) - percpu_ref_put(&c->writes); + if (bch2_write_ref_tryget(c, BCH_WRITE_REF_discard) && + !queue_work(c->write_ref_wq, &c->discard_work)) + bch2_write_ref_put(c, BCH_WRITE_REF_discard); } -static int invalidate_one_bucket(struct btree_trans *trans, struct bch_dev *ca) +static int invalidate_one_bucket(struct btree_trans *trans, + struct btree_iter *lru_iter, + struct bkey_s_c lru_k, + s64 *nr_to_invalidate) { struct bch_fs *c = trans->c; - struct btree_iter lru_iter, alloc_iter = { NULL }; - struct bkey_s_c k; - struct bkey_alloc_unpacked a; - u64 bucket, idx; - int ret; + struct btree_iter alloc_iter = { NULL }; + struct bkey_i_alloc_v4 *a = NULL; + struct printbuf buf = PRINTBUF; + struct bpos bucket = u64_to_bucket(lru_k.k->p.offset); + unsigned cached_sectors; + int ret = 0; - bch2_trans_iter_init(trans, &lru_iter, BTREE_ID_lru, - POS(ca->dev_idx, 0), 0); - k = bch2_btree_iter_peek(&lru_iter); - ret = bkey_err(k); + if (*nr_to_invalidate <= 0) + return 1; + + if (!bch2_dev_bucket_exists(c, bucket)) { + prt_str(&buf, "lru entry points to invalid bucket"); + goto err; + } + + if (bch2_bucket_is_open_safe(c, bucket.inode, bucket.offset)) + return 0; + + a = bch2_trans_start_alloc_update(trans, &alloc_iter, bucket); + ret = PTR_ERR_OR_ZERO(a); if (ret) goto out; - if (!k.k || k.k->p.inode != ca->dev_idx) + /* We expect harmless races here due to the btree write buffer: */ + if (lru_pos_time(lru_iter->pos) != alloc_lru_idx_read(a->v)) goto out; - if (bch2_fs_inconsistent_on(k.k->type != KEY_TYPE_lru, c, - "non lru key in lru btree")) - goto out; + BUG_ON(a->v.data_type != BCH_DATA_cached); - idx = k.k->p.offset; - bucket = le64_to_cpu(bkey_s_c_to_lru(k).v->idx); + if (!a->v.cached_sectors) + bch_err(c, "invalidating empty bucket, confused"); - bch2_trans_iter_init(trans, &alloc_iter, BTREE_ID_alloc, - POS(ca->dev_idx, bucket), - BTREE_ITER_CACHED| - BTREE_ITER_INTENT); - k = bch2_btree_iter_peek_slot(&alloc_iter); - ret = bkey_err(k); - if (ret) - goto out; + cached_sectors = a->v.cached_sectors; - a = bch2_alloc_unpack(k); + SET_BCH_ALLOC_V4_NEED_INC_GEN(&a->v, false); + a->v.gen++; + a->v.data_type = 0; + a->v.dirty_sectors = 0; + a->v.cached_sectors = 0; + a->v.io_time[READ] = atomic64_read(&c->io_clock[READ].now); + a->v.io_time[WRITE] = atomic64_read(&c->io_clock[WRITE].now); - if (bch2_fs_inconsistent_on(idx != alloc_lru_idx(a), c, - "invalidating bucket with wrong lru idx (got %llu should be %llu", - idx, alloc_lru_idx(a))) + ret = bch2_trans_update(trans, &alloc_iter, &a->k_i, + BTREE_TRIGGER_BUCKET_INVALIDATE) ?: + bch2_trans_commit(trans, NULL, NULL, + BCH_WATERMARK_btree| + BTREE_INSERT_NOFAIL); + if (ret) goto out; - a.gen++; - a.need_inc_gen = false; - a.data_type = 0; - a.dirty_sectors = 0; - a.cached_sectors = 0; - a.read_time = atomic64_read(&c->io_clock[READ].now); - a.write_time = atomic64_read(&c->io_clock[WRITE].now); - - ret = bch2_alloc_write(trans, &alloc_iter, &a, - BTREE_TRIGGER_BUCKET_INVALIDATE); + trace_and_count(c, bucket_invalidate, c, bucket.inode, bucket.offset, cached_sectors); + --*nr_to_invalidate; out: bch2_trans_iter_exit(trans, &alloc_iter); - bch2_trans_iter_exit(trans, &lru_iter); + printbuf_exit(&buf); return ret; +err: + prt_str(&buf, "\n lru key: "); + bch2_bkey_val_to_text(&buf, c, lru_k); + + prt_str(&buf, "\n lru entry: "); + bch2_lru_pos_to_text(&buf, lru_iter->pos); + + prt_str(&buf, "\n alloc key: "); + if (!a) + bch2_bpos_to_text(&buf, bucket); + else + bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&a->k_i)); + + bch_err(c, "%s", buf.buf); + if (c->curr_recovery_pass > BCH_RECOVERY_PASS_check_lrus) { + bch2_inconsistent_error(c); + ret = -EINVAL; + } + + goto out; } static void bch2_do_invalidates_work(struct work_struct *work) { struct bch_fs *c = container_of(work, struct bch_fs, invalidate_work); struct bch_dev *ca; - struct btree_trans trans; + struct btree_trans *trans = bch2_trans_get(c); + struct btree_iter iter; + struct bkey_s_c k; unsigned i; int ret = 0; - bch2_trans_init(&trans, c, 0, 0); + ret = bch2_btree_write_buffer_flush(trans); + if (ret) + goto err; + + for_each_member_device(ca, c, i) { + s64 nr_to_invalidate = + should_invalidate_buckets(ca, bch2_dev_usage_read(ca)); - for_each_member_device(ca, c, i) - while (!ret && should_invalidate_buckets(ca)) - ret = __bch2_trans_do(&trans, NULL, NULL, - BTREE_INSERT_NOFAIL, - invalidate_one_bucket(&trans, ca)); + ret = for_each_btree_key2_upto(trans, iter, BTREE_ID_lru, + lru_pos(ca->dev_idx, 0, 0), + lru_pos(ca->dev_idx, U64_MAX, LRU_TIME_MAX), + BTREE_ITER_INTENT, k, + invalidate_one_bucket(trans, &iter, k, &nr_to_invalidate)); - bch2_trans_exit(&trans); - percpu_ref_put(&c->writes); + if (ret < 0) { + percpu_ref_put(&ca->ref); + break; + } + } +err: + bch2_trans_put(trans); + bch2_write_ref_put(c, BCH_WRITE_REF_invalidate); } void bch2_do_invalidates(struct bch_fs *c) { - if (percpu_ref_tryget(&c->writes)) - queue_work(system_long_wq, &c->invalidate_work); + if (bch2_write_ref_tryget(c, BCH_WRITE_REF_invalidate) && + !queue_work(c->write_ref_wq, &c->invalidate_work)) + bch2_write_ref_put(c, BCH_WRITE_REF_invalidate); } -static int bch2_dev_freespace_init(struct bch_fs *c, struct bch_dev *ca) +static int bch2_dev_freespace_init(struct bch_fs *c, struct bch_dev *ca, + unsigned long *last_updated) { - struct btree_trans trans; + struct btree_trans *trans = bch2_trans_get(c); struct btree_iter iter; struct bkey_s_c k; - struct bkey_alloc_unpacked a; + struct bkey hole; + struct bpos end = POS(ca->dev_idx, ca->mi.nbuckets); struct bch_member *m; int ret; - bch2_trans_init(&trans, c, 0, 0); + bch2_trans_iter_init(trans, &iter, BTREE_ID_alloc, + POS(ca->dev_idx, ca->mi.first_bucket), + BTREE_ITER_PREFETCH); + /* + * Scan the alloc btree for every bucket on @ca, and add buckets to the + * freespace/need_discard/need_gc_gens btrees as needed: + */ + while (1) { + if (*last_updated + HZ * 10 < jiffies) { + bch_info(ca, "%s: currently at %llu/%llu", + __func__, iter.pos.offset, ca->mi.nbuckets); + *last_updated = jiffies; + } - for_each_btree_key(&trans, iter, BTREE_ID_alloc, - POS(ca->dev_idx, ca->mi.first_bucket), - BTREE_ITER_SLOTS| - BTREE_ITER_PREFETCH, k, ret) { - if (iter.pos.offset >= ca->mi.nbuckets) + bch2_trans_begin(trans); + + if (bkey_ge(iter.pos, end)) { + ret = 0; break; + } + + k = bch2_get_key_or_hole(&iter, end, &hole); + ret = bkey_err(k); + if (ret) + goto bkey_err; + + if (k.k->type) { + /* + * We process live keys in the alloc btree one at a + * time: + */ + struct bch_alloc_v4 a_convert; + const struct bch_alloc_v4 *a = bch2_alloc_to_v4(k, &a_convert); + + ret = bch2_bucket_do_index(trans, k, a, true) ?: + bch2_trans_commit(trans, NULL, NULL, + BTREE_INSERT_LAZY_RW| + BTREE_INSERT_NOFAIL); + if (ret) + goto bkey_err; + + bch2_btree_iter_advance(&iter); + } else { + struct bkey_i *freespace; + + freespace = bch2_trans_kmalloc(trans, sizeof(*freespace)); + ret = PTR_ERR_OR_ZERO(freespace); + if (ret) + goto bkey_err; + + bkey_init(&freespace->k); + freespace->k.type = KEY_TYPE_set; + freespace->k.p = k.k->p; + freespace->k.size = k.k->size; + + ret = bch2_btree_insert_trans(trans, BTREE_ID_freespace, freespace, 0) ?: + bch2_trans_commit(trans, NULL, NULL, + BTREE_INSERT_LAZY_RW| + BTREE_INSERT_NOFAIL); + if (ret) + goto bkey_err; - a = bch2_alloc_unpack(k); - ret = __bch2_trans_do(&trans, NULL, NULL, - BTREE_INSERT_LAZY_RW, - bch2_bucket_do_index(&trans, k, a, true)); + bch2_btree_iter_set_pos(&iter, k.k->p); + } +bkey_err: + if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) + continue; if (ret) break; } - bch2_trans_iter_exit(&trans, &iter); - bch2_trans_exit(&trans); + bch2_trans_iter_exit(trans, &iter); + bch2_trans_put(trans); - if (ret) { - bch_err(ca, "error initializing free space: %i", ret); + if (ret < 0) { + bch_err_msg(ca, ret, "initializing free space"); return ret; } @@ -995,7 +1926,7 @@ static int bch2_dev_freespace_init(struct bch_fs *c, struct bch_dev *ca) SET_BCH_MEMBER_FREESPACE_INITIALIZED(m, true); mutex_unlock(&c->sb_lock); - return ret; + return 0; } int bch2_fs_freespace_init(struct bch_fs *c) @@ -1004,6 +1935,7 @@ int bch2_fs_freespace_init(struct bch_fs *c) unsigned i; int ret = 0; bool doing_init = false; + unsigned long last_updated = jiffies; /* * We can crash during the device add path, so we need to check this on @@ -1019,9 +1951,10 @@ int bch2_fs_freespace_init(struct bch_fs *c) doing_init = true; } - ret = bch2_dev_freespace_init(c, ca); + ret = bch2_dev_freespace_init(c, ca, &last_updated); if (ret) { percpu_ref_put(&ca->ref); + bch_err_fn(c, ret); return ret; } } @@ -1030,11 +1963,10 @@ int bch2_fs_freespace_init(struct bch_fs *c) mutex_lock(&c->sb_lock); bch2_write_super(c); mutex_unlock(&c->sb_lock); - bch_verbose(c, "done initializing freespace"); } - return ret; + return 0; } /* Bucket IO clocks: */ @@ -1044,29 +1976,22 @@ int bch2_bucket_io_time_reset(struct btree_trans *trans, unsigned dev, { struct bch_fs *c = trans->c; struct btree_iter iter; - struct bkey_s_c k; - struct bkey_alloc_unpacked u; - u64 *time, now; + struct bkey_i_alloc_v4 *a; + u64 now; int ret = 0; - bch2_trans_iter_init(trans, &iter, BTREE_ID_alloc, POS(dev, bucket_nr), - BTREE_ITER_CACHED| - BTREE_ITER_INTENT); - k = bch2_btree_iter_peek_slot(&iter); - ret = bkey_err(k); + a = bch2_trans_start_alloc_update(trans, &iter, POS(dev, bucket_nr)); + ret = PTR_ERR_OR_ZERO(a); if (ret) - goto out; - - u = bch2_alloc_unpack(k); + return ret; - time = rw == READ ? &u.read_time : &u.write_time; now = atomic64_read(&c->io_clock[rw].now); - if (*time == now) + if (a->v.io_time[rw] == now) goto out; - *time = now; + a->v.io_time[rw] = now; - ret = bch2_alloc_write(trans, &iter, &u, 0) ?: + ret = bch2_trans_update(trans, &iter, &a->k_i, 0) ?: bch2_trans_commit(trans, NULL, NULL, 0); out: bch2_trans_iter_exit(trans, &iter); @@ -1180,40 +2105,7 @@ void bch2_dev_allocator_remove(struct bch_fs *c, struct bch_dev *ca) */ bch2_recalc_capacity(c); - /* Next, close write points that point to this device... */ - for (i = 0; i < ARRAY_SIZE(c->write_points); i++) - bch2_writepoint_stop(c, ca, &c->write_points[i]); - - bch2_writepoint_stop(c, ca, &c->copygc_write_point); - bch2_writepoint_stop(c, ca, &c->rebalance_write_point); - bch2_writepoint_stop(c, ca, &c->btree_write_point); - - mutex_lock(&c->btree_reserve_cache_lock); - while (c->btree_reserve_cache_nr) { - struct btree_alloc *a = - &c->btree_reserve_cache[--c->btree_reserve_cache_nr]; - - bch2_open_buckets_put(c, &a->ob); - } - mutex_unlock(&c->btree_reserve_cache_lock); - - while (1) { - struct open_bucket *ob; - - spin_lock(&c->freelist_lock); - if (!ca->open_buckets_partial_nr) { - spin_unlock(&c->freelist_lock); - break; - } - ob = c->open_buckets + - ca->open_buckets_partial[--ca->open_buckets_partial_nr]; - ob->on_partial_list = false; - spin_unlock(&c->freelist_lock); - - bch2_open_bucket_put(c, ob); - } - - bch2_ec_stop_dev(c, ca); + bch2_open_buckets_stop(c, ca, false); /* * Wake up threads that were blocked on allocation, so they can notice