diff options
Diffstat (limited to 'fs/bcachefs/buckets.c')
| -rw-r--r-- | fs/bcachefs/buckets.c | 1395 |
1 files changed, 0 insertions, 1395 deletions
diff --git a/fs/bcachefs/buckets.c b/fs/bcachefs/buckets.c deleted file mode 100644 index f25903c10e8a..000000000000 --- a/fs/bcachefs/buckets.c +++ /dev/null @@ -1,1395 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Code for manipulating bucket marks for garbage collection. - * - * Copyright 2014 Datera, Inc. - */ - -#include "bcachefs.h" -#include "alloc_background.h" -#include "backpointers.h" -#include "bset.h" -#include "btree_gc.h" -#include "btree_update.h" -#include "buckets.h" -#include "buckets_waiting_for_journal.h" -#include "disk_accounting.h" -#include "ec.h" -#include "error.h" -#include "inode.h" -#include "movinggc.h" -#include "rebalance.h" -#include "recovery.h" -#include "recovery_passes.h" -#include "reflink.h" -#include "replicas.h" -#include "subvolume.h" -#include "trace.h" - -#include <linux/preempt.h> - -void bch2_dev_usage_read_fast(struct bch_dev *ca, struct bch_dev_usage *usage) -{ - for (unsigned i = 0; i < BCH_DATA_NR; i++) - usage->buckets[i] = percpu_u64_get(&ca->usage->d[i].buckets); -} - -void bch2_dev_usage_full_read_fast(struct bch_dev *ca, struct bch_dev_usage_full *usage) -{ - memset(usage, 0, sizeof(*usage)); - acc_u64s_percpu((u64 *) usage, (u64 __percpu *) ca->usage, - sizeof(struct bch_dev_usage_full) / sizeof(u64)); -} - -static u64 reserve_factor(u64 r) -{ - return r + (round_up(r, (1 << RESERVE_FACTOR)) >> RESERVE_FACTOR); -} - -static struct bch_fs_usage_short -__bch2_fs_usage_read_short(struct bch_fs *c) -{ - struct bch_fs_usage_short ret; - u64 data, reserved; - - ret.capacity = c->capacity - - percpu_u64_get(&c->usage->hidden); - - data = percpu_u64_get(&c->usage->data) + - percpu_u64_get(&c->usage->btree); - reserved = percpu_u64_get(&c->usage->reserved) + - percpu_u64_get(c->online_reserved); - - ret.used = min(ret.capacity, data + reserve_factor(reserved)); - ret.free = ret.capacity - ret.used; - - ret.nr_inodes = percpu_u64_get(&c->usage->nr_inodes); - - return ret; -} - -struct bch_fs_usage_short -bch2_fs_usage_read_short(struct bch_fs *c) -{ - struct bch_fs_usage_short ret; - - percpu_down_read(&c->mark_lock); - ret = __bch2_fs_usage_read_short(c); - percpu_up_read(&c->mark_lock); - - return ret; -} - -void bch2_dev_usage_to_text(struct printbuf *out, - struct bch_dev *ca, - struct bch_dev_usage_full *usage) -{ - if (out->nr_tabstops < 5) { - printbuf_tabstops_reset(out); - printbuf_tabstop_push(out, 12); - printbuf_tabstop_push(out, 16); - printbuf_tabstop_push(out, 16); - printbuf_tabstop_push(out, 16); - printbuf_tabstop_push(out, 16); - } - - prt_printf(out, "\tbuckets\rsectors\rfragmented\r\n"); - - for (unsigned i = 0; i < BCH_DATA_NR; i++) { - bch2_prt_data_type(out, i); - prt_printf(out, "\t%llu\r%llu\r%llu\r\n", - usage->d[i].buckets, - usage->d[i].sectors, - usage->d[i].fragmented); - } - - prt_printf(out, "capacity\t%llu\r\n", ca->mi.nbuckets); -} - -static int bch2_check_fix_ptr(struct btree_trans *trans, - struct bkey_s_c k, - struct extent_ptr_decoded p, - const union bch_extent_entry *entry, - bool *do_update) -{ - struct bch_fs *c = trans->c; - struct printbuf buf = PRINTBUF; - int ret = 0; - - struct bch_dev *ca = bch2_dev_tryget(c, p.ptr.dev); - if (!ca) { - if (fsck_err_on(p.ptr.dev != BCH_SB_MEMBER_INVALID, - trans, ptr_to_invalid_device, - "pointer to missing device %u\n" - "while marking %s", - p.ptr.dev, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) - *do_update = true; - return 0; - } - - struct bucket *g = PTR_GC_BUCKET(ca, &p.ptr); - if (!g) { - if (fsck_err(trans, ptr_to_invalid_device, - "pointer to invalid bucket on device %u\n" - "while marking %s", - p.ptr.dev, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) - *do_update = true; - goto out; - } - - enum bch_data_type data_type = bch2_bkey_ptr_data_type(k, p, entry); - - if (fsck_err_on(!g->gen_valid, - trans, ptr_to_missing_alloc_key, - "bucket %u:%zu data type %s ptr gen %u missing in alloc btree\n" - "while marking %s", - p.ptr.dev, PTR_BUCKET_NR(ca, &p.ptr), - bch2_data_type_str(ptr_data_type(k.k, &p.ptr)), - p.ptr.gen, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { - if (!p.ptr.cached) { - g->gen_valid = true; - g->gen = p.ptr.gen; - } else { - /* this pointer will be dropped */ - *do_update = true; - goto out; - } - } - - /* g->gen_valid == true */ - - if (fsck_err_on(gen_cmp(p.ptr.gen, g->gen) > 0, - trans, ptr_gen_newer_than_bucket_gen, - "bucket %u:%zu data type %s ptr gen in the future: %u > %u\n" - "while marking %s", - p.ptr.dev, PTR_BUCKET_NR(ca, &p.ptr), - bch2_data_type_str(ptr_data_type(k.k, &p.ptr)), - p.ptr.gen, g->gen, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { - if (!p.ptr.cached && - (g->data_type != BCH_DATA_btree || - data_type == BCH_DATA_btree)) { - g->data_type = data_type; - g->stripe_sectors = 0; - g->dirty_sectors = 0; - g->cached_sectors = 0; - } - - *do_update = true; - } - - if (fsck_err_on(gen_cmp(g->gen, p.ptr.gen) > BUCKET_GC_GEN_MAX, - trans, ptr_gen_newer_than_bucket_gen, - "bucket %u:%zu gen %u data type %s: ptr gen %u too stale\n" - "while marking %s", - p.ptr.dev, PTR_BUCKET_NR(ca, &p.ptr), g->gen, - bch2_data_type_str(ptr_data_type(k.k, &p.ptr)), - p.ptr.gen, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) - *do_update = true; - - if (fsck_err_on(!p.ptr.cached && gen_cmp(p.ptr.gen, g->gen) < 0, - trans, stale_dirty_ptr, - "bucket %u:%zu data type %s stale dirty ptr: %u < %u\n" - "while marking %s", - p.ptr.dev, PTR_BUCKET_NR(ca, &p.ptr), - bch2_data_type_str(ptr_data_type(k.k, &p.ptr)), - p.ptr.gen, g->gen, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) - *do_update = true; - - if (data_type != BCH_DATA_btree && p.ptr.gen != g->gen) - goto out; - - if (fsck_err_on(bucket_data_type_mismatch(g->data_type, data_type), - trans, ptr_bucket_data_type_mismatch, - "bucket %u:%zu gen %u different types of data in same bucket: %s, %s\n" - "while marking %s", - p.ptr.dev, PTR_BUCKET_NR(ca, &p.ptr), g->gen, - bch2_data_type_str(g->data_type), - bch2_data_type_str(data_type), - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { - if (!p.ptr.cached && - data_type == BCH_DATA_btree) { - switch (g->data_type) { - case BCH_DATA_sb: - bch_err(c, "btree and superblock in the same bucket - cannot repair"); - ret = bch_err_throw(c, fsck_repair_unimplemented); - goto out; - case BCH_DATA_journal: - ret = bch2_dev_journal_bucket_delete(ca, PTR_BUCKET_NR(ca, &p.ptr)); - bch_err_msg(c, ret, "error deleting journal bucket %zu", - PTR_BUCKET_NR(ca, &p.ptr)); - if (ret) - goto out; - break; - } - - g->data_type = data_type; - g->stripe_sectors = 0; - g->dirty_sectors = 0; - g->cached_sectors = 0; - } else { - *do_update = true; - } - } - - if (p.has_ec) { - struct gc_stripe *m = genradix_ptr(&c->gc_stripes, p.ec.idx); - - if (fsck_err_on(!m || !m->alive, - trans, ptr_to_missing_stripe, - "pointer to nonexistent stripe %llu\n" - "while marking %s", - (u64) p.ec.idx, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) - *do_update = true; - - if (fsck_err_on(m && m->alive && !bch2_ptr_matches_stripe_m(m, p), - trans, ptr_to_incorrect_stripe, - "pointer does not match stripe %llu\n" - "while marking %s", - (u64) p.ec.idx, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf))) - *do_update = true; - } -out: -fsck_err: - bch2_dev_put(ca); - printbuf_exit(&buf); - return ret; -} - -int bch2_check_fix_ptrs(struct btree_trans *trans, - enum btree_id btree, unsigned level, struct bkey_s_c k, - enum btree_iter_update_trigger_flags flags) -{ - struct bch_fs *c = trans->c; - struct bkey_ptrs_c ptrs_c = bch2_bkey_ptrs_c(k); - const union bch_extent_entry *entry_c; - struct extent_ptr_decoded p = { 0 }; - bool do_update = false; - struct printbuf buf = PRINTBUF; - int ret = 0; - - /* We don't yet do btree key updates correctly for when we're RW */ - BUG_ON(test_bit(BCH_FS_rw, &c->flags)); - - bkey_for_each_ptr_decode(k.k, ptrs_c, p, entry_c) { - ret = bch2_check_fix_ptr(trans, k, p, entry_c, &do_update); - if (ret) - goto err; - } - - if (do_update) { - struct bkey_i *new = bch2_bkey_make_mut_noupdate(trans, k); - ret = PTR_ERR_OR_ZERO(new); - if (ret) - goto err; - - scoped_guard(rcu) - bch2_bkey_drop_ptrs(bkey_i_to_s(new), ptr, !bch2_dev_exists(c, ptr->dev)); - - if (level) { - /* - * We don't want to drop btree node pointers - if the - * btree node isn't there anymore, the read path will - * sort it out: - */ - struct bkey_ptrs ptrs = bch2_bkey_ptrs(bkey_i_to_s(new)); - scoped_guard(rcu) - bkey_for_each_ptr(ptrs, ptr) { - struct bch_dev *ca = bch2_dev_rcu(c, ptr->dev); - ptr->gen = PTR_GC_BUCKET(ca, ptr)->gen; - } - } else { - struct bkey_ptrs ptrs; - union bch_extent_entry *entry; - - rcu_read_lock(); -restart_drop_ptrs: - ptrs = bch2_bkey_ptrs(bkey_i_to_s(new)); - bkey_for_each_ptr_decode(bkey_i_to_s(new).k, ptrs, p, entry) { - struct bch_dev *ca = bch2_dev_rcu(c, p.ptr.dev); - struct bucket *g = PTR_GC_BUCKET(ca, &p.ptr); - enum bch_data_type data_type = bch2_bkey_ptr_data_type(bkey_i_to_s_c(new), p, entry); - - if ((p.ptr.cached && - (!g->gen_valid || gen_cmp(p.ptr.gen, g->gen) > 0)) || - (!p.ptr.cached && - gen_cmp(p.ptr.gen, g->gen) < 0) || - gen_cmp(g->gen, p.ptr.gen) > BUCKET_GC_GEN_MAX || - (g->data_type && - g->data_type != data_type)) { - bch2_bkey_drop_ptr(bkey_i_to_s(new), &entry->ptr); - goto restart_drop_ptrs; - } - } - rcu_read_unlock(); -again: - ptrs = bch2_bkey_ptrs(bkey_i_to_s(new)); - bkey_extent_entry_for_each(ptrs, entry) { - if (extent_entry_type(entry) == BCH_EXTENT_ENTRY_stripe_ptr) { - struct gc_stripe *m = genradix_ptr(&c->gc_stripes, - entry->stripe_ptr.idx); - union bch_extent_entry *next_ptr; - - bkey_extent_entry_for_each_from(ptrs, next_ptr, entry) - if (extent_entry_type(next_ptr) == BCH_EXTENT_ENTRY_ptr) - goto found; - next_ptr = NULL; -found: - if (!next_ptr) { - bch_err(c, "aieee, found stripe ptr with no data ptr"); - continue; - } - - if (!m || !m->alive || - !__bch2_ptr_matches_stripe(&m->ptrs[entry->stripe_ptr.block], - &next_ptr->ptr, - m->sectors)) { - bch2_bkey_extent_entry_drop(new, entry); - goto again; - } - } - } - } - - if (0) { - printbuf_reset(&buf); - bch2_bkey_val_to_text(&buf, c, k); - bch_info(c, "updated %s", buf.buf); - - printbuf_reset(&buf); - bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(new)); - bch_info(c, "new key %s", buf.buf); - } - - if (!(flags & BTREE_TRIGGER_is_root)) { - struct btree_iter iter; - bch2_trans_node_iter_init(trans, &iter, btree, new->k.p, 0, level, - BTREE_ITER_intent|BTREE_ITER_all_snapshots); - ret = bch2_btree_iter_traverse(trans, &iter) ?: - bch2_trans_update(trans, &iter, new, - BTREE_UPDATE_internal_snapshot_node| - BTREE_TRIGGER_norun); - bch2_trans_iter_exit(trans, &iter); - if (ret) - goto err; - - if (level) - bch2_btree_node_update_key_early(trans, btree, level - 1, k, new); - } else { - struct jset_entry *e = bch2_trans_jset_entry_alloc(trans, - jset_u64s(new->k.u64s)); - ret = PTR_ERR_OR_ZERO(e); - if (ret) - goto err; - - journal_entry_set(e, - BCH_JSET_ENTRY_btree_root, - btree, level - 1, - new, new->k.u64s); - - /* - * no locking, we're single threaded and not rw yet, see - * the big assertino above that we repeat here: - */ - BUG_ON(test_bit(BCH_FS_rw, &c->flags)); - - struct btree *b = bch2_btree_id_root(c, btree)->b; - bkey_copy(&b->key, new); - } - } -err: - printbuf_exit(&buf); - return ret; -} - -static int bucket_ref_update_err(struct btree_trans *trans, struct printbuf *buf, - struct bkey_s_c k, bool insert, enum bch_sb_error_id id) -{ - struct bch_fs *c = trans->c; - - prt_printf(buf, "\nwhile marking "); - bch2_bkey_val_to_text(buf, c, k); - prt_newline(buf); - - bool print = __bch2_count_fsck_err(c, id, buf); - - int ret = bch2_run_explicit_recovery_pass(c, buf, - BCH_RECOVERY_PASS_check_allocations, 0); - - if (insert) { - bch2_trans_updates_to_text(buf, trans); - __bch2_inconsistent_error(c, buf); - /* - * If we're in recovery, run_explicit_recovery_pass might give - * us an error code for rewinding recovery - */ - if (!ret) - ret = bch_err_throw(c, bucket_ref_update); - } else { - /* Always ignore overwrite errors, so that deletion works */ - ret = 0; - } - - if (print || insert) - bch2_print_str(c, KERN_ERR, buf->buf); - return ret; -} - -int bch2_bucket_ref_update(struct btree_trans *trans, struct bch_dev *ca, - struct bkey_s_c k, - const struct bch_extent_ptr *ptr, - s64 sectors, enum bch_data_type ptr_data_type, - u8 b_gen, u8 bucket_data_type, - u32 *bucket_sectors) -{ - struct bch_fs *c = trans->c; - size_t bucket_nr = PTR_BUCKET_NR(ca, ptr); - struct printbuf buf = PRINTBUF; - bool inserting = sectors > 0; - int ret = 0; - - BUG_ON(!sectors); - - if (unlikely(gen_after(ptr->gen, b_gen))) { - bch2_log_msg_start(c, &buf); - prt_printf(&buf, - "bucket %u:%zu gen %u data type %s: ptr gen %u newer than bucket gen", - ptr->dev, bucket_nr, b_gen, - bch2_data_type_str(bucket_data_type ?: ptr_data_type), - ptr->gen); - - ret = bucket_ref_update_err(trans, &buf, k, inserting, - BCH_FSCK_ERR_ptr_gen_newer_than_bucket_gen); - goto out; - } - - if (unlikely(gen_cmp(b_gen, ptr->gen) > BUCKET_GC_GEN_MAX)) { - bch2_log_msg_start(c, &buf); - prt_printf(&buf, - "bucket %u:%zu gen %u data type %s: ptr gen %u too stale", - ptr->dev, bucket_nr, b_gen, - bch2_data_type_str(bucket_data_type ?: ptr_data_type), - ptr->gen); - - ret = bucket_ref_update_err(trans, &buf, k, inserting, - BCH_FSCK_ERR_ptr_too_stale); - goto out; - } - - if (b_gen != ptr->gen && ptr->cached) { - ret = 1; - goto out; - } - - if (unlikely(b_gen != ptr->gen)) { - bch2_log_msg_start(c, &buf); - prt_printf(&buf, - "bucket %u:%zu gen %u (mem gen %u) data type %s: stale dirty ptr (gen %u)", - ptr->dev, bucket_nr, b_gen, - bucket_gen_get(ca, bucket_nr), - bch2_data_type_str(bucket_data_type ?: ptr_data_type), - ptr->gen); - - ret = bucket_ref_update_err(trans, &buf, k, inserting, - BCH_FSCK_ERR_stale_dirty_ptr); - goto out; - } - - if (unlikely(bucket_data_type_mismatch(bucket_data_type, ptr_data_type))) { - bch2_log_msg_start(c, &buf); - prt_printf(&buf, "bucket %u:%zu gen %u different types of data in same bucket: %s, %s", - ptr->dev, bucket_nr, b_gen, - bch2_data_type_str(bucket_data_type), - bch2_data_type_str(ptr_data_type)); - - ret = bucket_ref_update_err(trans, &buf, k, inserting, - BCH_FSCK_ERR_ptr_bucket_data_type_mismatch); - goto out; - } - - if (unlikely((u64) *bucket_sectors + sectors > U32_MAX)) { - bch2_log_msg_start(c, &buf); - prt_printf(&buf, - "bucket %u:%zu gen %u data type %s sector count overflow: %u + %lli > U32_MAX", - ptr->dev, bucket_nr, b_gen, - bch2_data_type_str(bucket_data_type ?: ptr_data_type), - *bucket_sectors, sectors); - - ret = bucket_ref_update_err(trans, &buf, k, inserting, - BCH_FSCK_ERR_bucket_sector_count_overflow); - sectors = -*bucket_sectors; - goto out; - } - - *bucket_sectors += sectors; -out: - printbuf_exit(&buf); - return ret; -} - -void bch2_trans_account_disk_usage_change(struct btree_trans *trans) -{ - struct bch_fs *c = trans->c; - u64 disk_res_sectors = trans->disk_res ? trans->disk_res->sectors : 0; - static int warned_disk_usage = 0; - bool warn = false; - - percpu_down_read(&c->mark_lock); - struct bch_fs_usage_base *src = &trans->fs_usage_delta; - - s64 added = src->btree + src->data + src->reserved; - - /* - * Not allowed to reduce sectors_available except by getting a - * reservation: - */ - s64 should_not_have_added = added - (s64) disk_res_sectors; - if (unlikely(should_not_have_added > 0)) { - u64 old, new; - - old = atomic64_read(&c->sectors_available); - do { - new = max_t(s64, 0, old - should_not_have_added); - } while (!atomic64_try_cmpxchg(&c->sectors_available, - &old, new)); - - added -= should_not_have_added; - warn = true; - } - - if (added > 0) { - trans->disk_res->sectors -= added; - this_cpu_sub(*c->online_reserved, added); - } - - preempt_disable(); - struct bch_fs_usage_base *dst = this_cpu_ptr(c->usage); - acc_u64s((u64 *) dst, (u64 *) src, sizeof(*src) / sizeof(u64)); - preempt_enable(); - percpu_up_read(&c->mark_lock); - - if (unlikely(warn) && !xchg(&warned_disk_usage, 1)) - bch2_trans_inconsistent(trans, - "disk usage increased %lli more than %llu sectors reserved)", - should_not_have_added, disk_res_sectors); -} - -/* KEY_TYPE_extent: */ - -static int __mark_pointer(struct btree_trans *trans, struct bch_dev *ca, - struct bkey_s_c k, - const struct extent_ptr_decoded *p, - s64 sectors, enum bch_data_type ptr_data_type, - struct bch_alloc_v4 *a, - bool insert) -{ - u32 *dst_sectors = p->has_ec ? &a->stripe_sectors : - !p->ptr.cached ? &a->dirty_sectors : - &a->cached_sectors; - int ret = bch2_bucket_ref_update(trans, ca, k, &p->ptr, sectors, ptr_data_type, - a->gen, a->data_type, dst_sectors); - - if (ret) - return ret; - if (insert) - alloc_data_type_set(a, ptr_data_type); - return 0; -} - -static int bch2_trigger_pointer(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c k, struct extent_ptr_decoded p, - const union bch_extent_entry *entry, - s64 *sectors, - enum btree_iter_update_trigger_flags flags) -{ - struct bch_fs *c = trans->c; - bool insert = !(flags & BTREE_TRIGGER_overwrite); - struct printbuf buf = PRINTBUF; - int ret = 0; - - struct bkey_i_backpointer bp; - bch2_extent_ptr_to_bp(c, btree_id, level, k, p, entry, &bp); - - *sectors = insert ? bp.v.bucket_len : -(s64) bp.v.bucket_len; - - struct bch_dev *ca = bch2_dev_tryget(c, p.ptr.dev); - if (unlikely(!ca)) { - if (insert && p.ptr.dev != BCH_SB_MEMBER_INVALID) - ret = bch_err_throw(c, trigger_pointer); - goto err; - } - - struct bpos bucket = PTR_BUCKET_POS(ca, &p.ptr); - if (!bucket_valid(ca, bucket.offset)) { - if (insert) { - bch2_dev_bucket_missing(ca, bucket.offset); - ret = bch_err_throw(c, trigger_pointer); - } - goto err; - } - - if (flags & BTREE_TRIGGER_transactional) { - struct bkey_i_alloc_v4 *a = bch2_trans_start_alloc_update(trans, bucket, 0); - ret = PTR_ERR_OR_ZERO(a) ?: - __mark_pointer(trans, ca, k, &p, *sectors, bp.v.data_type, &a->v, insert); - if (ret) - goto err; - - ret = bch2_bucket_backpointer_mod(trans, k, &bp, insert); - if (ret) - goto err; - } - - if (flags & BTREE_TRIGGER_gc) { - struct bucket *g = gc_bucket(ca, bucket.offset); - if (bch2_fs_inconsistent_on(!g, c, "reference to invalid bucket on device %u\n %s", - p.ptr.dev, - (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { - ret = bch_err_throw(c, trigger_pointer); - goto err; - } - - bucket_lock(g); - struct bch_alloc_v4 old = bucket_m_to_alloc(*g), new = old; - ret = __mark_pointer(trans, ca, k, &p, *sectors, bp.v.data_type, &new, insert); - alloc_to_bucket(g, new); - bucket_unlock(g); - - if (!ret) - ret = bch2_alloc_key_to_dev_counters(trans, ca, &old, &new, flags); - } -err: - bch2_dev_put(ca); - printbuf_exit(&buf); - return ret; -} - -static int bch2_trigger_stripe_ptr(struct btree_trans *trans, - struct bkey_s_c k, - struct extent_ptr_decoded p, - enum bch_data_type data_type, - s64 sectors, - enum btree_iter_update_trigger_flags flags) -{ - struct bch_fs *c = trans->c; - - if (flags & BTREE_TRIGGER_transactional) { - struct btree_iter iter; - struct bkey_i_stripe *s = bch2_bkey_get_mut_typed(trans, &iter, - BTREE_ID_stripes, POS(0, p.ec.idx), - BTREE_ITER_with_updates, stripe); - int ret = PTR_ERR_OR_ZERO(s); - if (unlikely(ret)) { - bch2_trans_inconsistent_on(bch2_err_matches(ret, ENOENT), trans, - "pointer to nonexistent stripe %llu", - (u64) p.ec.idx); - goto err; - } - - if (!bch2_ptr_matches_stripe(&s->v, p)) { - bch2_trans_inconsistent(trans, - "stripe pointer doesn't match stripe %llu", - (u64) p.ec.idx); - ret = bch_err_throw(c, trigger_stripe_pointer); - goto err; - } - - stripe_blockcount_set(&s->v, p.ec.block, - stripe_blockcount_get(&s->v, p.ec.block) + - sectors); - - struct disk_accounting_pos acc; - memset(&acc, 0, sizeof(acc)); - acc.type = BCH_DISK_ACCOUNTING_replicas; - bch2_bkey_to_replicas(&acc.replicas, bkey_i_to_s_c(&s->k_i)); - acc.replicas.data_type = data_type; - ret = bch2_disk_accounting_mod(trans, &acc, §ors, 1, false); -err: - bch2_trans_iter_exit(trans, &iter); - return ret; - } - - if (flags & BTREE_TRIGGER_gc) { - struct gc_stripe *m = genradix_ptr_alloc(&c->gc_stripes, p.ec.idx, GFP_KERNEL); - if (!m) { - bch_err(c, "error allocating memory for gc_stripes, idx %llu", - (u64) p.ec.idx); - return bch_err_throw(c, ENOMEM_mark_stripe_ptr); - } - - gc_stripe_lock(m); - - if (!m || !m->alive) { - gc_stripe_unlock(m); - struct printbuf buf = PRINTBUF; - bch2_log_msg_start(c, &buf); - prt_printf(&buf, "pointer to nonexistent stripe %llu\n while marking ", - (u64) p.ec.idx); - bch2_bkey_val_to_text(&buf, c, k); - __bch2_inconsistent_error(c, &buf); - bch2_print_str(c, KERN_ERR, buf.buf); - printbuf_exit(&buf); - return bch_err_throw(c, trigger_stripe_pointer); - } - - m->block_sectors[p.ec.block] += sectors; - - struct disk_accounting_pos acc; - memset(&acc, 0, sizeof(acc)); - acc.type = BCH_DISK_ACCOUNTING_replicas; - unsafe_memcpy(&acc.replicas, &m->r.e, replicas_entry_bytes(&m->r.e), "VLA"); - gc_stripe_unlock(m); - - acc.replicas.data_type = data_type; - int ret = bch2_disk_accounting_mod(trans, &acc, §ors, 1, true); - if (ret) - return ret; - } - - return 0; -} - -static int __trigger_extent(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c k, - enum btree_iter_update_trigger_flags flags) -{ - bool gc = flags & BTREE_TRIGGER_gc; - struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); - const union bch_extent_entry *entry; - struct extent_ptr_decoded p; - enum bch_data_type data_type = bkey_is_btree_ptr(k.k) - ? BCH_DATA_btree - : BCH_DATA_user; - int ret = 0; - - s64 replicas_sectors = 0; - - struct disk_accounting_pos acc_replicas_key; - memset(&acc_replicas_key, 0, sizeof(acc_replicas_key)); - acc_replicas_key.type = BCH_DISK_ACCOUNTING_replicas; - acc_replicas_key.replicas.data_type = data_type; - acc_replicas_key.replicas.nr_devs = 0; - acc_replicas_key.replicas.nr_required = 1; - - unsigned cur_compression_type = 0; - u64 compression_acct[3] = { 1, 0, 0 }; - - bkey_for_each_ptr_decode(k.k, ptrs, p, entry) { - s64 disk_sectors = 0; - ret = bch2_trigger_pointer(trans, btree_id, level, k, p, entry, &disk_sectors, flags); - if (ret < 0) - return ret; - - bool stale = ret > 0; - - if (p.ptr.cached && stale) - continue; - - if (p.ptr.cached) { - ret = bch2_mod_dev_cached_sectors(trans, p.ptr.dev, disk_sectors, gc); - if (ret) - return ret; - } else if (!p.has_ec) { - replicas_sectors += disk_sectors; - replicas_entry_add_dev(&acc_replicas_key.replicas, p.ptr.dev); - } else { - ret = bch2_trigger_stripe_ptr(trans, k, p, data_type, disk_sectors, flags); - if (ret) - return ret; - - /* - * There may be other dirty pointers in this extent, but - * if so they're not required for mounting if we have an - * erasure coded pointer in this extent: - */ - acc_replicas_key.replicas.nr_required = 0; - } - - if (cur_compression_type && - cur_compression_type != p.crc.compression_type) { - if (flags & BTREE_TRIGGER_overwrite) - bch2_u64s_neg(compression_acct, ARRAY_SIZE(compression_acct)); - - ret = bch2_disk_accounting_mod2(trans, gc, compression_acct, - compression, cur_compression_type); - if (ret) - return ret; - - compression_acct[0] = 1; - compression_acct[1] = 0; - compression_acct[2] = 0; - } - - cur_compression_type = p.crc.compression_type; - if (p.crc.compression_type) { - compression_acct[1] += p.crc.uncompressed_size; - compression_acct[2] += p.crc.compressed_size; - } - } - - if (acc_replicas_key.replicas.nr_devs) { - ret = bch2_disk_accounting_mod(trans, &acc_replicas_key, &replicas_sectors, 1, gc); - if (ret) - return ret; - } - - if (acc_replicas_key.replicas.nr_devs && !level && k.k->p.snapshot) { - ret = bch2_disk_accounting_mod2_nr(trans, gc, &replicas_sectors, 1, snapshot, k.k->p.snapshot); - if (ret) - return ret; - } - - if (cur_compression_type) { - if (flags & BTREE_TRIGGER_overwrite) - bch2_u64s_neg(compression_acct, ARRAY_SIZE(compression_acct)); - - ret = bch2_disk_accounting_mod2(trans, gc, compression_acct, - compression, cur_compression_type); - if (ret) - return ret; - } - - if (level) { - ret = bch2_disk_accounting_mod2_nr(trans, gc, &replicas_sectors, 1, btree, btree_id); - if (ret) - return ret; - } else { - bool insert = !(flags & BTREE_TRIGGER_overwrite); - - s64 v[3] = { - insert ? 1 : -1, - insert ? k.k->size : -((s64) k.k->size), - replicas_sectors, - }; - ret = bch2_disk_accounting_mod2(trans, gc, v, inum, k.k->p.inode); - if (ret) - return ret; - } - - return 0; -} - -int bch2_trigger_extent(struct btree_trans *trans, - enum btree_id btree, unsigned level, - struct bkey_s_c old, struct bkey_s new, - enum btree_iter_update_trigger_flags flags) -{ - struct bch_fs *c = trans->c; - struct bkey_ptrs_c new_ptrs = bch2_bkey_ptrs_c(new.s_c); - struct bkey_ptrs_c old_ptrs = bch2_bkey_ptrs_c(old); - unsigned new_ptrs_bytes = (void *) new_ptrs.end - (void *) new_ptrs.start; - unsigned old_ptrs_bytes = (void *) old_ptrs.end - (void *) old_ptrs.start; - - if (unlikely(flags & BTREE_TRIGGER_check_repair)) - return bch2_check_fix_ptrs(trans, btree, level, new.s_c, flags); - - /* if pointers aren't changing - nothing to do: */ - if (new_ptrs_bytes == old_ptrs_bytes && - !memcmp(new_ptrs.start, - old_ptrs.start, - new_ptrs_bytes)) - return 0; - - if (flags & (BTREE_TRIGGER_transactional|BTREE_TRIGGER_gc)) { - if (old.k->type) { - int ret = __trigger_extent(trans, btree, level, old, - flags & ~BTREE_TRIGGER_insert); - if (ret) - return ret; - } - - if (new.k->type) { - int ret = __trigger_extent(trans, btree, level, new.s_c, - flags & ~BTREE_TRIGGER_overwrite); - if (ret) - return ret; - } - - int need_rebalance_delta = 0; - s64 need_rebalance_sectors_delta[1] = { 0 }; - - s64 s = bch2_bkey_sectors_need_rebalance(c, old); - need_rebalance_delta -= s != 0; - need_rebalance_sectors_delta[0] -= s; - - s = bch2_bkey_sectors_need_rebalance(c, new.s_c); - need_rebalance_delta += s != 0; - need_rebalance_sectors_delta[0] += s; - - if ((flags & BTREE_TRIGGER_transactional) && need_rebalance_delta) { - int ret = bch2_btree_bit_mod_buffered(trans, BTREE_ID_rebalance_work, - new.k->p, need_rebalance_delta > 0); - if (ret) - return ret; - } - - if (need_rebalance_sectors_delta[0]) { - int ret = bch2_disk_accounting_mod2(trans, flags & BTREE_TRIGGER_gc, - need_rebalance_sectors_delta, rebalance_work); - if (ret) - return ret; - } - } - - return 0; -} - -/* KEY_TYPE_reservation */ - -static int __trigger_reservation(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, struct bkey_s_c k, - enum btree_iter_update_trigger_flags flags) -{ - if (flags & (BTREE_TRIGGER_transactional|BTREE_TRIGGER_gc)) { - s64 sectors[1] = { k.k->size }; - - if (flags & BTREE_TRIGGER_overwrite) - sectors[0] = -sectors[0]; - - return bch2_disk_accounting_mod2(trans, flags & BTREE_TRIGGER_gc, sectors, - persistent_reserved, bkey_s_c_to_reservation(k).v->nr_replicas); - } - - return 0; -} - -int bch2_trigger_reservation(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c old, struct bkey_s new, - enum btree_iter_update_trigger_flags flags) -{ - return trigger_run_overwrite_then_insert(__trigger_reservation, trans, btree_id, level, old, new, flags); -} - -/* Mark superblocks: */ - -static int __bch2_trans_mark_metadata_bucket(struct btree_trans *trans, - struct bch_dev *ca, u64 b, - enum bch_data_type type, - unsigned sectors) -{ - struct bch_fs *c = trans->c; - struct btree_iter iter; - int ret = 0; - - struct bkey_i_alloc_v4 *a = - bch2_trans_start_alloc_update_noupdate(trans, &iter, POS(ca->dev_idx, b)); - if (IS_ERR(a)) - return PTR_ERR(a); - - if (a->v.data_type && type && a->v.data_type != type) { - struct printbuf buf = PRINTBUF; - bch2_log_msg_start(c, &buf); - prt_printf(&buf, "bucket %llu:%llu gen %u different types of data in same bucket: %s, %s\n" - "while marking %s\n", - iter.pos.inode, iter.pos.offset, a->v.gen, - bch2_data_type_str(a->v.data_type), - bch2_data_type_str(type), - bch2_data_type_str(type)); - - bch2_count_fsck_err(c, bucket_metadata_type_mismatch, &buf); - - ret = bch2_run_explicit_recovery_pass(c, &buf, - BCH_RECOVERY_PASS_check_allocations, 0); - - /* Always print, this is always fatal */ - bch2_print_str(c, KERN_ERR, buf.buf); - printbuf_exit(&buf); - if (!ret) - ret = bch_err_throw(c, metadata_bucket_inconsistency); - goto err; - } - - if (a->v.data_type != type || - a->v.dirty_sectors != sectors) { - a->v.data_type = type; - a->v.dirty_sectors = sectors; - ret = bch2_trans_update(trans, &iter, &a->k_i, 0); - } -err: - bch2_trans_iter_exit(trans, &iter); - return ret; -} - -static int bch2_mark_metadata_bucket(struct btree_trans *trans, struct bch_dev *ca, - u64 b, enum bch_data_type data_type, unsigned sectors, - enum btree_iter_update_trigger_flags flags) -{ - struct bch_fs *c = trans->c; - int ret = 0; - - struct bucket *g = gc_bucket(ca, b); - if (bch2_fs_inconsistent_on(!g, c, "reference to invalid bucket on device %u when marking metadata type %s", - ca->dev_idx, bch2_data_type_str(data_type))) - goto err; - - bucket_lock(g); - struct bch_alloc_v4 old = bucket_m_to_alloc(*g); - - if (bch2_fs_inconsistent_on(g->data_type && - g->data_type != data_type, c, - "different types of data in same bucket: %s, %s", - bch2_data_type_str(g->data_type), - bch2_data_type_str(data_type))) - goto err_unlock; - - if (bch2_fs_inconsistent_on((u64) g->dirty_sectors + sectors > ca->mi.bucket_size, c, - "bucket %u:%llu gen %u data type %s sector count overflow: %u + %u > bucket size", - ca->dev_idx, b, g->gen, - bch2_data_type_str(g->data_type ?: data_type), - g->dirty_sectors, sectors)) - goto err_unlock; - - g->data_type = data_type; - g->dirty_sectors += sectors; - struct bch_alloc_v4 new = bucket_m_to_alloc(*g); - bucket_unlock(g); - ret = bch2_alloc_key_to_dev_counters(trans, ca, &old, &new, flags); - return ret; -err_unlock: - bucket_unlock(g); -err: - return bch_err_throw(c, metadata_bucket_inconsistency); -} - -int bch2_trans_mark_metadata_bucket(struct btree_trans *trans, - struct bch_dev *ca, u64 b, - enum bch_data_type type, unsigned sectors, - enum btree_iter_update_trigger_flags flags) -{ - BUG_ON(type != BCH_DATA_free && - type != BCH_DATA_sb && - type != BCH_DATA_journal); - - /* - * Backup superblock might be past the end of our normal usable space: - */ - if (b >= ca->mi.nbuckets) - return 0; - - if (flags & BTREE_TRIGGER_gc) - return bch2_mark_metadata_bucket(trans, ca, b, type, sectors, flags); - else if (flags & BTREE_TRIGGER_transactional) - return commit_do(trans, NULL, NULL, 0, - __bch2_trans_mark_metadata_bucket(trans, ca, b, type, sectors)); - else - BUG(); -} - -static int bch2_trans_mark_metadata_sectors(struct btree_trans *trans, - struct bch_dev *ca, u64 start, u64 end, - enum bch_data_type type, u64 *bucket, unsigned *bucket_sectors, - enum btree_iter_update_trigger_flags flags) -{ - do { - u64 b = sector_to_bucket(ca, start); - unsigned sectors = - min_t(u64, bucket_to_sector(ca, b + 1), end) - start; - - if (b != *bucket && *bucket_sectors) { - int ret = bch2_trans_mark_metadata_bucket(trans, ca, *bucket, - type, *bucket_sectors, flags); - if (ret) - return ret; - - *bucket_sectors = 0; - } - - *bucket = b; - *bucket_sectors += sectors; - start += sectors; - } while (start < end); - - return 0; -} - -static int __bch2_trans_mark_dev_sb(struct btree_trans *trans, struct bch_dev *ca, - enum btree_iter_update_trigger_flags flags) -{ - struct bch_fs *c = trans->c; - - mutex_lock(&c->sb_lock); - struct bch_sb_layout layout = ca->disk_sb.sb->layout; - mutex_unlock(&c->sb_lock); - - u64 bucket = 0; - unsigned i, bucket_sectors = 0; - int ret; - - for (i = 0; i < layout.nr_superblocks; i++) { - u64 offset = le64_to_cpu(layout.sb_offset[i]); - - if (offset == BCH_SB_SECTOR) { - ret = bch2_trans_mark_metadata_sectors(trans, ca, - 0, BCH_SB_SECTOR, - BCH_DATA_sb, &bucket, &bucket_sectors, flags); - if (ret) - return ret; - } - - ret = bch2_trans_mark_metadata_sectors(trans, ca, offset, - offset + (1 << layout.sb_max_size_bits), - BCH_DATA_sb, &bucket, &bucket_sectors, flags); - if (ret) - return ret; - } - - if (bucket_sectors) { - ret = bch2_trans_mark_metadata_bucket(trans, ca, - bucket, BCH_DATA_sb, bucket_sectors, flags); - if (ret) - return ret; - } - - for (i = 0; i < ca->journal.nr; i++) { - ret = bch2_trans_mark_metadata_bucket(trans, ca, - ca->journal.buckets[i], - BCH_DATA_journal, ca->mi.bucket_size, flags); - if (ret) - return ret; - } - - return 0; -} - -int bch2_trans_mark_dev_sb(struct bch_fs *c, struct bch_dev *ca, - enum btree_iter_update_trigger_flags flags) -{ - int ret = bch2_trans_run(c, - __bch2_trans_mark_dev_sb(trans, ca, flags)); - bch_err_fn(c, ret); - return ret; -} - -int bch2_trans_mark_dev_sbs_flags(struct bch_fs *c, - enum btree_iter_update_trigger_flags flags) -{ - for_each_online_member(c, ca, BCH_DEV_READ_REF_trans_mark_dev_sbs) { - int ret = bch2_trans_mark_dev_sb(c, ca, flags); - if (ret) { - enumerated_ref_put(&ca->io_ref[READ], BCH_DEV_READ_REF_trans_mark_dev_sbs); - return ret; - } - } - - return 0; -} - -int bch2_trans_mark_dev_sbs(struct bch_fs *c) -{ - return bch2_trans_mark_dev_sbs_flags(c, BTREE_TRIGGER_transactional); -} - -bool bch2_is_superblock_bucket(struct bch_dev *ca, u64 b) -{ - struct bch_sb_layout *layout = &ca->disk_sb.sb->layout; - u64 b_offset = bucket_to_sector(ca, b); - u64 b_end = bucket_to_sector(ca, b + 1); - unsigned i; - - if (!b) - return true; - - for (i = 0; i < layout->nr_superblocks; i++) { - u64 offset = le64_to_cpu(layout->sb_offset[i]); - u64 end = offset + (1 << layout->sb_max_size_bits); - - if (!(offset >= b_end || end <= b_offset)) - return true; - } - - for (i = 0; i < ca->journal.nr; i++) - if (b == ca->journal.buckets[i]) - return true; - - return false; -} - -/* Disk reservations: */ - -#define SECTORS_CACHE 1024 - -int __bch2_disk_reservation_add(struct bch_fs *c, struct disk_reservation *res, - u64 sectors, enum bch_reservation_flags flags) -{ - struct bch_fs_pcpu *pcpu; - u64 old, get; - u64 sectors_available; - int ret; - - percpu_down_read(&c->mark_lock); - preempt_disable(); - pcpu = this_cpu_ptr(c->pcpu); - - if (sectors <= pcpu->sectors_available) - goto out; - - old = atomic64_read(&c->sectors_available); - do { - get = min((u64) sectors + SECTORS_CACHE, old); - - if (get < sectors) { - preempt_enable(); - goto recalculate; - } - } while (!atomic64_try_cmpxchg(&c->sectors_available, - &old, old - get)); - - pcpu->sectors_available += get; - -out: - pcpu->sectors_available -= sectors; - this_cpu_add(*c->online_reserved, sectors); - res->sectors += sectors; - - preempt_enable(); - percpu_up_read(&c->mark_lock); - return 0; - -recalculate: - mutex_lock(&c->sectors_available_lock); - - percpu_u64_set(&c->pcpu->sectors_available, 0); - sectors_available = avail_factor(__bch2_fs_usage_read_short(c).free); - - if (sectors_available && (flags & BCH_DISK_RESERVATION_PARTIAL)) - sectors = min(sectors, sectors_available); - - if (sectors <= sectors_available || - (flags & BCH_DISK_RESERVATION_NOFAIL)) { - atomic64_set(&c->sectors_available, - max_t(s64, 0, sectors_available - sectors)); - this_cpu_add(*c->online_reserved, sectors); - res->sectors += sectors; - ret = 0; - } else { - atomic64_set(&c->sectors_available, sectors_available); - ret = bch_err_throw(c, ENOSPC_disk_reservation); - } - - mutex_unlock(&c->sectors_available_lock); - percpu_up_read(&c->mark_lock); - - return ret; -} - -/* Startup/shutdown: */ - -void bch2_buckets_nouse_free(struct bch_fs *c) -{ - for_each_member_device(c, ca) { - kvfree_rcu_mightsleep(ca->buckets_nouse); - ca->buckets_nouse = NULL; - } -} - -int bch2_buckets_nouse_alloc(struct bch_fs *c) -{ - for_each_member_device(c, ca) { - BUG_ON(ca->buckets_nouse); - - ca->buckets_nouse = bch2_kvmalloc(BITS_TO_LONGS(ca->mi.nbuckets) * - sizeof(unsigned long), - GFP_KERNEL|__GFP_ZERO); - if (!ca->buckets_nouse) { - bch2_dev_put(ca); - return bch_err_throw(c, ENOMEM_buckets_nouse); - } - } - - return 0; -} - -static void bucket_gens_free_rcu(struct rcu_head *rcu) -{ - struct bucket_gens *buckets = - container_of(rcu, struct bucket_gens, rcu); - - kvfree(buckets); -} - -int bch2_dev_buckets_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets) -{ - struct bucket_gens *bucket_gens = NULL, *old_bucket_gens = NULL; - bool resize = ca->bucket_gens != NULL; - int ret; - - if (resize) - lockdep_assert_held(&c->state_lock); - - if (resize && ca->buckets_nouse) - return bch_err_throw(c, no_resize_with_buckets_nouse); - - bucket_gens = bch2_kvmalloc(struct_size(bucket_gens, b, nbuckets), - GFP_KERNEL|__GFP_ZERO); - if (!bucket_gens) { - ret = bch_err_throw(c, ENOMEM_bucket_gens); - goto err; - } - - bucket_gens->first_bucket = ca->mi.first_bucket; - bucket_gens->nbuckets = nbuckets; - bucket_gens->nbuckets_minus_first = - bucket_gens->nbuckets - bucket_gens->first_bucket; - - old_bucket_gens = rcu_dereference_protected(ca->bucket_gens, 1); - - if (resize) { - u64 copy = min(bucket_gens->nbuckets, - old_bucket_gens->nbuckets); - memcpy(bucket_gens->b, - old_bucket_gens->b, - sizeof(bucket_gens->b[0]) * copy); - } - - ret = bch2_bucket_bitmap_resize(ca, &ca->bucket_backpointer_mismatch, - ca->mi.nbuckets, nbuckets) ?: - bch2_bucket_bitmap_resize(ca, &ca->bucket_backpointer_empty, - ca->mi.nbuckets, nbuckets); - - rcu_assign_pointer(ca->bucket_gens, bucket_gens); - bucket_gens = old_bucket_gens; - - nbuckets = ca->mi.nbuckets; - - ret = 0; -err: - if (bucket_gens) - call_rcu(&bucket_gens->rcu, bucket_gens_free_rcu); - - return ret; -} - -void bch2_dev_buckets_free(struct bch_dev *ca) -{ - kvfree(ca->buckets_nouse); - kvfree(rcu_dereference_protected(ca->bucket_gens, 1)); - free_percpu(ca->usage); -} - -int bch2_dev_buckets_alloc(struct bch_fs *c, struct bch_dev *ca) -{ - ca->usage = alloc_percpu(struct bch_dev_usage_full); - if (!ca->usage) - return bch_err_throw(c, ENOMEM_usage_init); - - return bch2_dev_buckets_resize(c, ca, ca->mi.nbuckets); -} |