diff options
Diffstat (limited to 'c_src/libbcachefs/buckets.c')
| -rw-r--r-- | c_src/libbcachefs/buckets.c | 1413 |
1 files changed, 0 insertions, 1413 deletions
diff --git a/c_src/libbcachefs/buckets.c b/c_src/libbcachefs/buckets.c deleted file mode 100644 index 67b7e796..00000000 --- a/c_src/libbcachefs/buckets.c +++ /dev/null @@ -1,1413 +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 "ec.h" -#include "error.h" -#include "inode.h" -#include "movinggc.h" -#include "recovery.h" -#include "reflink.h" -#include "replicas.h" -#include "subvolume.h" -#include "trace.h" - -#include <linux/preempt.h> - -static inline void fs_usage_data_type_to_base(struct bch_fs_usage *fs_usage, - enum bch_data_type data_type, - s64 sectors) -{ - switch (data_type) { - case BCH_DATA_btree: - fs_usage->btree += sectors; - break; - case BCH_DATA_user: - case BCH_DATA_parity: - fs_usage->data += sectors; - break; - case BCH_DATA_cached: - fs_usage->cached += sectors; - break; - default: - break; - } -} - -void bch2_fs_usage_initialize(struct bch_fs *c) -{ - percpu_down_write(&c->mark_lock); - struct bch_fs_usage *usage = c->usage_base; - - for (unsigned i = 0; i < ARRAY_SIZE(c->usage); i++) - bch2_fs_usage_acc_to_base(c, i); - - for (unsigned i = 0; i < BCH_REPLICAS_MAX; i++) - usage->reserved += usage->persistent_reserved[i]; - - for (unsigned i = 0; i < c->replicas.nr; i++) { - struct bch_replicas_entry_v1 *e = - cpu_replicas_entry(&c->replicas, i); - - fs_usage_data_type_to_base(usage, e->data_type, usage->replicas[i]); - } - - for_each_member_device(c, ca) { - struct bch_dev_usage dev = bch2_dev_usage_read(ca); - - usage->hidden += (dev.d[BCH_DATA_sb].buckets + - dev.d[BCH_DATA_journal].buckets) * - ca->mi.bucket_size; - } - - percpu_up_write(&c->mark_lock); -} - -static inline struct bch_dev_usage *dev_usage_ptr(struct bch_dev *ca, - unsigned journal_seq, - bool gc) -{ - BUG_ON(!gc && !journal_seq); - - return this_cpu_ptr(gc - ? ca->usage_gc - : ca->usage[journal_seq & JOURNAL_BUF_MASK]); -} - -void bch2_dev_usage_read_fast(struct bch_dev *ca, struct bch_dev_usage *usage) -{ - struct bch_fs *c = ca->fs; - unsigned seq, i, u64s = dev_usage_u64s(); - - do { - seq = read_seqcount_begin(&c->usage_lock); - memcpy(usage, ca->usage_base, u64s * sizeof(u64)); - for (i = 0; i < ARRAY_SIZE(ca->usage); i++) - acc_u64s_percpu((u64 *) usage, (u64 __percpu *) ca->usage[i], u64s); - } while (read_seqcount_retry(&c->usage_lock, seq)); -} - -u64 bch2_fs_usage_read_one(struct bch_fs *c, u64 *v) -{ - ssize_t offset = v - (u64 *) c->usage_base; - unsigned i, seq; - u64 ret; - - BUG_ON(offset < 0 || offset >= fs_usage_u64s(c)); - percpu_rwsem_assert_held(&c->mark_lock); - - do { - seq = read_seqcount_begin(&c->usage_lock); - ret = *v; - - for (i = 0; i < ARRAY_SIZE(c->usage); i++) - ret += percpu_u64_get((u64 __percpu *) c->usage[i] + offset); - } while (read_seqcount_retry(&c->usage_lock, seq)); - - return ret; -} - -struct bch_fs_usage_online *bch2_fs_usage_read(struct bch_fs *c) -{ - struct bch_fs_usage_online *ret; - unsigned nr_replicas = READ_ONCE(c->replicas.nr); - unsigned seq, i; -retry: - ret = kmalloc(__fs_usage_online_u64s(nr_replicas) * sizeof(u64), GFP_KERNEL); - if (unlikely(!ret)) - return NULL; - - percpu_down_read(&c->mark_lock); - - if (nr_replicas != c->replicas.nr) { - nr_replicas = c->replicas.nr; - percpu_up_read(&c->mark_lock); - kfree(ret); - goto retry; - } - - ret->online_reserved = percpu_u64_get(c->online_reserved); - - do { - seq = read_seqcount_begin(&c->usage_lock); - unsafe_memcpy(&ret->u, c->usage_base, - __fs_usage_u64s(nr_replicas) * sizeof(u64), - "embedded variable length struct"); - for (i = 0; i < ARRAY_SIZE(c->usage); i++) - acc_u64s_percpu((u64 *) &ret->u, (u64 __percpu *) c->usage[i], - __fs_usage_u64s(nr_replicas)); - } while (read_seqcount_retry(&c->usage_lock, seq)); - - return ret; -} - -void bch2_fs_usage_acc_to_base(struct bch_fs *c, unsigned idx) -{ - unsigned u64s = fs_usage_u64s(c); - - BUG_ON(idx >= ARRAY_SIZE(c->usage)); - - preempt_disable(); - write_seqcount_begin(&c->usage_lock); - - acc_u64s_percpu((u64 *) c->usage_base, - (u64 __percpu *) c->usage[idx], u64s); - percpu_memset(c->usage[idx], 0, u64s * sizeof(u64)); - - rcu_read_lock(); - for_each_member_device_rcu(c, ca, NULL) { - u64s = dev_usage_u64s(); - - acc_u64s_percpu((u64 *) ca->usage_base, - (u64 __percpu *) ca->usage[idx], u64s); - percpu_memset(ca->usage[idx], 0, u64s * sizeof(u64)); - } - rcu_read_unlock(); - - write_seqcount_end(&c->usage_lock); - preempt_enable(); -} - -void bch2_fs_usage_to_text(struct printbuf *out, - struct bch_fs *c, - struct bch_fs_usage_online *fs_usage) -{ - unsigned i; - - prt_printf(out, "capacity:\t\t\t%llu\n", c->capacity); - - prt_printf(out, "hidden:\t\t\t\t%llu\n", - fs_usage->u.hidden); - prt_printf(out, "data:\t\t\t\t%llu\n", - fs_usage->u.data); - prt_printf(out, "cached:\t\t\t\t%llu\n", - fs_usage->u.cached); - prt_printf(out, "reserved:\t\t\t%llu\n", - fs_usage->u.reserved); - prt_printf(out, "nr_inodes:\t\t\t%llu\n", - fs_usage->u.nr_inodes); - prt_printf(out, "online reserved:\t\t%llu\n", - fs_usage->online_reserved); - - for (i = 0; - i < ARRAY_SIZE(fs_usage->u.persistent_reserved); - i++) { - prt_printf(out, "%u replicas:\n", i + 1); - prt_printf(out, "\treserved:\t\t%llu\n", - fs_usage->u.persistent_reserved[i]); - } - - for (i = 0; i < c->replicas.nr; i++) { - struct bch_replicas_entry_v1 *e = - cpu_replicas_entry(&c->replicas, i); - - prt_printf(out, "\t"); - bch2_replicas_entry_to_text(out, e); - prt_printf(out, ":\t%llu\n", fs_usage->u.replicas[i]); - } -} - -static u64 reserve_factor(u64 r) -{ - return r + (round_up(r, (1 << RESERVE_FACTOR)) >> RESERVE_FACTOR); -} - -u64 bch2_fs_sectors_used(struct bch_fs *c, struct bch_fs_usage_online *fs_usage) -{ - return min(fs_usage->u.hidden + - fs_usage->u.btree + - fs_usage->u.data + - reserve_factor(fs_usage->u.reserved + - fs_usage->online_reserved), - c->capacity); -} - -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 - - bch2_fs_usage_read_one(c, &c->usage_base->hidden); - - data = bch2_fs_usage_read_one(c, &c->usage_base->data) + - bch2_fs_usage_read_one(c, &c->usage_base->btree); - reserved = bch2_fs_usage_read_one(c, &c->usage_base->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 = bch2_fs_usage_read_one(c, &c->usage_base->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_init(struct bch_dev *ca) -{ - ca->usage_base->d[BCH_DATA_free].buckets = ca->mi.nbuckets - ca->mi.first_bucket; -} - -void bch2_dev_usage_to_text(struct printbuf *out, struct bch_dev_usage *usage) -{ - prt_tab(out); - prt_str(out, "buckets"); - prt_tab_rjust(out); - prt_str(out, "sectors"); - prt_tab_rjust(out); - prt_str(out, "fragmented"); - prt_tab_rjust(out); - prt_newline(out); - - for (unsigned i = 0; i < BCH_DATA_NR; i++) { - prt_str(out, bch2_data_types[i]); - prt_tab(out); - prt_u64(out, usage->d[i].buckets); - prt_tab_rjust(out); - prt_u64(out, usage->d[i].sectors); - prt_tab_rjust(out); - prt_u64(out, usage->d[i].fragmented); - prt_tab_rjust(out); - prt_newline(out); - } -} - -void bch2_dev_usage_update(struct bch_fs *c, struct bch_dev *ca, - const struct bch_alloc_v4 *old, - const struct bch_alloc_v4 *new, - u64 journal_seq, bool gc) -{ - struct bch_fs_usage *fs_usage; - struct bch_dev_usage *u; - - preempt_disable(); - fs_usage = fs_usage_ptr(c, journal_seq, gc); - - if (data_type_is_hidden(old->data_type)) - fs_usage->hidden -= ca->mi.bucket_size; - if (data_type_is_hidden(new->data_type)) - fs_usage->hidden += ca->mi.bucket_size; - - u = dev_usage_ptr(ca, journal_seq, gc); - - u->d[old->data_type].buckets--; - u->d[new->data_type].buckets++; - - u->d[old->data_type].sectors -= bch2_bucket_sectors_dirty(*old); - u->d[new->data_type].sectors += bch2_bucket_sectors_dirty(*new); - - u->d[BCH_DATA_cached].sectors += new->cached_sectors; - u->d[BCH_DATA_cached].sectors -= old->cached_sectors; - - u->d[old->data_type].fragmented -= bch2_bucket_sectors_fragmented(ca, *old); - u->d[new->data_type].fragmented += bch2_bucket_sectors_fragmented(ca, *new); - - preempt_enable(); -} - -static inline struct bch_alloc_v4 bucket_m_to_alloc(struct bucket b) -{ - return (struct bch_alloc_v4) { - .gen = b.gen, - .data_type = b.data_type, - .dirty_sectors = b.dirty_sectors, - .cached_sectors = b.cached_sectors, - .stripe = b.stripe, - }; -} - -void bch2_dev_usage_update_m(struct bch_fs *c, struct bch_dev *ca, - struct bucket *old, struct bucket *new) -{ - struct bch_alloc_v4 old_a = bucket_m_to_alloc(*old); - struct bch_alloc_v4 new_a = bucket_m_to_alloc(*new); - - bch2_dev_usage_update(c, ca, &old_a, &new_a, 0, true); -} - -static inline int __update_replicas(struct bch_fs *c, - struct bch_fs_usage *fs_usage, - struct bch_replicas_entry_v1 *r, - s64 sectors) -{ - int idx = bch2_replicas_entry_idx(c, r); - - if (idx < 0) - return -1; - - fs_usage_data_type_to_base(fs_usage, r->data_type, sectors); - fs_usage->replicas[idx] += sectors; - return 0; -} - -int bch2_update_replicas(struct bch_fs *c, struct bkey_s_c k, - struct bch_replicas_entry_v1 *r, s64 sectors, - unsigned journal_seq, bool gc) -{ - struct bch_fs_usage *fs_usage; - int idx, ret = 0; - struct printbuf buf = PRINTBUF; - - percpu_down_read(&c->mark_lock); - - idx = bch2_replicas_entry_idx(c, r); - if (idx < 0 && - fsck_err(c, ptr_to_missing_replicas_entry, - "no replicas entry\n while marking %s", - (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { - percpu_up_read(&c->mark_lock); - ret = bch2_mark_replicas(c, r); - percpu_down_read(&c->mark_lock); - - if (ret) - goto err; - idx = bch2_replicas_entry_idx(c, r); - } - if (idx < 0) { - ret = -1; - goto err; - } - - preempt_disable(); - fs_usage = fs_usage_ptr(c, journal_seq, gc); - fs_usage_data_type_to_base(fs_usage, r->data_type, sectors); - fs_usage->replicas[idx] += sectors; - preempt_enable(); -err: -fsck_err: - percpu_up_read(&c->mark_lock); - printbuf_exit(&buf); - return ret; -} - -static inline int update_cached_sectors(struct bch_fs *c, - struct bkey_s_c k, - unsigned dev, s64 sectors, - unsigned journal_seq, bool gc) -{ - struct bch_replicas_padded r; - - bch2_replicas_entry_cached(&r.e, dev); - - return bch2_update_replicas(c, k, &r.e, sectors, journal_seq, gc); -} - -static int __replicas_deltas_realloc(struct btree_trans *trans, unsigned more, - gfp_t gfp) -{ - struct replicas_delta_list *d = trans->fs_usage_deltas; - unsigned new_size = d ? (d->size + more) * 2 : 128; - unsigned alloc_size = sizeof(*d) + new_size; - - WARN_ON_ONCE(alloc_size > REPLICAS_DELTA_LIST_MAX); - - if (!d || d->used + more > d->size) { - d = krealloc(d, alloc_size, gfp|__GFP_ZERO); - - if (unlikely(!d)) { - if (alloc_size > REPLICAS_DELTA_LIST_MAX) - return -ENOMEM; - - d = mempool_alloc(&trans->c->replicas_delta_pool, gfp); - if (!d) - return -ENOMEM; - - memset(d, 0, REPLICAS_DELTA_LIST_MAX); - - if (trans->fs_usage_deltas) - memcpy(d, trans->fs_usage_deltas, - trans->fs_usage_deltas->size + sizeof(*d)); - - new_size = REPLICAS_DELTA_LIST_MAX - sizeof(*d); - kfree(trans->fs_usage_deltas); - } - - d->size = new_size; - trans->fs_usage_deltas = d; - } - - return 0; -} - -int bch2_replicas_deltas_realloc(struct btree_trans *trans, unsigned more) -{ - return allocate_dropping_locks_errcode(trans, - __replicas_deltas_realloc(trans, more, _gfp)); -} - -int bch2_update_replicas_list(struct btree_trans *trans, - struct bch_replicas_entry_v1 *r, - s64 sectors) -{ - struct replicas_delta_list *d; - struct replicas_delta *n; - unsigned b; - int ret; - - if (!sectors) - return 0; - - b = replicas_entry_bytes(r) + 8; - ret = bch2_replicas_deltas_realloc(trans, b); - if (ret) - return ret; - - d = trans->fs_usage_deltas; - n = (void *) d->d + d->used; - n->delta = sectors; - unsafe_memcpy((void *) n + offsetof(struct replicas_delta, r), - r, replicas_entry_bytes(r), - "flexible array member embedded in strcuct with padding"); - bch2_replicas_entry_sort(&n->r); - d->used += b; - return 0; -} - -int bch2_update_cached_sectors_list(struct btree_trans *trans, unsigned dev, s64 sectors) -{ - struct bch_replicas_padded r; - - bch2_replicas_entry_cached(&r.e, dev); - - return bch2_update_replicas_list(trans, &r.e, sectors); -} - -int bch2_mark_metadata_bucket(struct bch_fs *c, struct bch_dev *ca, - size_t b, enum bch_data_type data_type, - unsigned sectors, struct gc_pos pos, - unsigned flags) -{ - struct bucket old, new, *g; - int ret = 0; - - BUG_ON(!(flags & BTREE_TRIGGER_GC)); - BUG_ON(data_type != BCH_DATA_sb && - data_type != BCH_DATA_journal); - - /* - * Backup superblock might be past the end of our normal usable space: - */ - if (b >= ca->mi.nbuckets) - return 0; - - percpu_down_read(&c->mark_lock); - g = gc_bucket(ca, b); - - bucket_lock(g); - old = *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_types[g->data_type], - bch2_data_types[data_type])) { - ret = -EIO; - goto err; - } - - if (bch2_fs_inconsistent_on((u64) g->dirty_sectors + sectors > ca->mi.bucket_size, c, - "bucket %u:%zu gen %u data type %s sector count overflow: %u + %u > bucket size", - ca->dev_idx, b, g->gen, - bch2_data_types[g->data_type ?: data_type], - g->dirty_sectors, sectors)) { - ret = -EIO; - goto err; - } - - g->data_type = data_type; - g->dirty_sectors += sectors; - new = *g; -err: - bucket_unlock(g); - if (!ret) - bch2_dev_usage_update_m(c, ca, &old, &new); - percpu_up_read(&c->mark_lock); - return ret; -} - -int bch2_check_bucket_ref(struct btree_trans *trans, - 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; - struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev); - size_t bucket_nr = PTR_BUCKET_NR(ca, ptr); - struct printbuf buf = PRINTBUF; - int ret = 0; - - if (bucket_data_type == BCH_DATA_cached) - bucket_data_type = BCH_DATA_user; - - if ((bucket_data_type == BCH_DATA_stripe && ptr_data_type == BCH_DATA_user) || - (bucket_data_type == BCH_DATA_user && ptr_data_type == BCH_DATA_stripe)) - bucket_data_type = ptr_data_type = BCH_DATA_stripe; - - if (gen_after(ptr->gen, b_gen)) { - bch2_fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, - BCH_FSCK_ERR_ptr_gen_newer_than_bucket_gen, - "bucket %u:%zu gen %u data type %s: ptr gen %u newer than bucket gen\n" - "while marking %s", - ptr->dev, bucket_nr, b_gen, - bch2_data_types[bucket_data_type ?: ptr_data_type], - ptr->gen, - (bch2_bkey_val_to_text(&buf, c, k), buf.buf)); - ret = -EIO; - goto err; - } - - if (gen_cmp(b_gen, ptr->gen) > BUCKET_GC_GEN_MAX) { - bch2_fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, - BCH_FSCK_ERR_ptr_too_stale, - "bucket %u:%zu gen %u data type %s: ptr gen %u too stale\n" - "while marking %s", - ptr->dev, bucket_nr, b_gen, - bch2_data_types[bucket_data_type ?: ptr_data_type], - ptr->gen, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf)); - ret = -EIO; - goto err; - } - - if (b_gen != ptr->gen && !ptr->cached) { - bch2_fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, - BCH_FSCK_ERR_stale_dirty_ptr, - "bucket %u:%zu gen %u (mem gen %u) data type %s: stale dirty ptr (gen %u)\n" - "while marking %s", - ptr->dev, bucket_nr, b_gen, - *bucket_gen(ca, bucket_nr), - bch2_data_types[bucket_data_type ?: ptr_data_type], - ptr->gen, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf)); - ret = -EIO; - goto err; - } - - if (b_gen != ptr->gen) { - ret = 1; - goto out; - } - - if (!data_type_is_empty(bucket_data_type) && - ptr_data_type && - bucket_data_type != ptr_data_type) { - bch2_fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, - BCH_FSCK_ERR_ptr_bucket_data_type_mismatch, - "bucket %u:%zu gen %u different types of data in same bucket: %s, %s\n" - "while marking %s", - ptr->dev, bucket_nr, b_gen, - bch2_data_types[bucket_data_type], - bch2_data_types[ptr_data_type], - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf)); - ret = -EIO; - goto err; - } - - if ((u64) bucket_sectors + sectors > U32_MAX) { - bch2_fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, - BCH_FSCK_ERR_bucket_sector_count_overflow, - "bucket %u:%zu gen %u data type %s sector count overflow: %u + %lli > U32_MAX\n" - "while marking %s", - ptr->dev, bucket_nr, b_gen, - bch2_data_types[bucket_data_type ?: ptr_data_type], - bucket_sectors, sectors, - (printbuf_reset(&buf), - bch2_bkey_val_to_text(&buf, c, k), buf.buf)); - ret = -EIO; - goto err; - } -out: - printbuf_exit(&buf); - return ret; -err: - bch2_dump_trans_updates(trans); - goto out; -} - -void bch2_trans_fs_usage_revert(struct btree_trans *trans, - struct replicas_delta_list *deltas) -{ - struct bch_fs *c = trans->c; - struct bch_fs_usage *dst; - struct replicas_delta *d, *top = (void *) deltas->d + deltas->used; - s64 added = 0; - unsigned i; - - percpu_down_read(&c->mark_lock); - preempt_disable(); - dst = fs_usage_ptr(c, trans->journal_res.seq, false); - - /* revert changes: */ - for (d = deltas->d; d != top; d = replicas_delta_next(d)) { - switch (d->r.data_type) { - case BCH_DATA_btree: - case BCH_DATA_user: - case BCH_DATA_parity: - added += d->delta; - } - BUG_ON(__update_replicas(c, dst, &d->r, -d->delta)); - } - - dst->nr_inodes -= deltas->nr_inodes; - - for (i = 0; i < BCH_REPLICAS_MAX; i++) { - added -= deltas->persistent_reserved[i]; - dst->reserved -= deltas->persistent_reserved[i]; - dst->persistent_reserved[i] -= deltas->persistent_reserved[i]; - } - - if (added > 0) { - trans->disk_res->sectors += added; - this_cpu_add(*c->online_reserved, added); - } - - preempt_enable(); - percpu_up_read(&c->mark_lock); -} - -int bch2_trans_fs_usage_apply(struct btree_trans *trans, - struct replicas_delta_list *deltas) -{ - struct bch_fs *c = trans->c; - static int warned_disk_usage = 0; - bool warn = false; - u64 disk_res_sectors = trans->disk_res ? trans->disk_res->sectors : 0; - struct replicas_delta *d, *d2; - struct replicas_delta *top = (void *) deltas->d + deltas->used; - struct bch_fs_usage *dst; - s64 added = 0, should_not_have_added; - unsigned i; - - percpu_down_read(&c->mark_lock); - preempt_disable(); - dst = fs_usage_ptr(c, trans->journal_res.seq, false); - - for (d = deltas->d; d != top; d = replicas_delta_next(d)) { - switch (d->r.data_type) { - case BCH_DATA_btree: - case BCH_DATA_user: - case BCH_DATA_parity: - added += d->delta; - } - - if (__update_replicas(c, dst, &d->r, d->delta)) - goto need_mark; - } - - dst->nr_inodes += deltas->nr_inodes; - - for (i = 0; i < BCH_REPLICAS_MAX; i++) { - added += deltas->persistent_reserved[i]; - dst->reserved += deltas->persistent_reserved[i]; - dst->persistent_reserved[i] += deltas->persistent_reserved[i]; - } - - /* - * Not allowed to reduce sectors_available except by getting a - * reservation: - */ - should_not_have_added = added - (s64) disk_res_sectors; - if (unlikely(should_not_have_added > 0)) { - u64 old, new, v = atomic64_read(&c->sectors_available); - - do { - old = v; - new = max_t(s64, 0, old - should_not_have_added); - } while ((v = atomic64_cmpxchg(&c->sectors_available, - old, new)) != old); - - added -= should_not_have_added; - warn = true; - } - - if (added > 0) { - trans->disk_res->sectors -= added; - this_cpu_sub(*c->online_reserved, added); - } - - 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); - return 0; -need_mark: - /* revert changes: */ - for (d2 = deltas->d; d2 != d; d2 = replicas_delta_next(d2)) - BUG_ON(__update_replicas(c, dst, &d2->r, -d2->delta)); - - preempt_enable(); - percpu_up_read(&c->mark_lock); - return -1; -} - -/* KEY_TYPE_extent: */ - -static int __mark_pointer(struct btree_trans *trans, - struct bkey_s_c k, - const struct bch_extent_ptr *ptr, - s64 sectors, enum bch_data_type ptr_data_type, - u8 bucket_gen, u8 *bucket_data_type, - u32 *dirty_sectors, u32 *cached_sectors) -{ - u32 *dst_sectors = !ptr->cached - ? dirty_sectors - : cached_sectors; - int ret = bch2_check_bucket_ref(trans, k, ptr, sectors, ptr_data_type, - bucket_gen, *bucket_data_type, *dst_sectors); - - if (ret) - return ret; - - *dst_sectors += sectors; - - if (!*dirty_sectors && !*cached_sectors) - *bucket_data_type = 0; - else if (*bucket_data_type != BCH_DATA_stripe) - *bucket_data_type = 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, - s64 *sectors, - unsigned flags) -{ - bool insert = !(flags & BTREE_TRIGGER_OVERWRITE); - struct bpos bucket; - struct bch_backpointer bp; - - bch2_extent_ptr_to_bp(trans->c, btree_id, level, k, p, &bucket, &bp); - *sectors = insert ? bp.bucket_len : -((s64) bp.bucket_len); - - if (flags & BTREE_TRIGGER_TRANSACTIONAL) { - struct btree_iter iter; - struct bkey_i_alloc_v4 *a = bch2_trans_start_alloc_update(trans, &iter, bucket); - int ret = PTR_ERR_OR_ZERO(a); - if (ret) - return ret; - - ret = __mark_pointer(trans, k, &p.ptr, *sectors, bp.data_type, - a->v.gen, &a->v.data_type, - &a->v.dirty_sectors, &a->v.cached_sectors) ?: - bch2_trans_update(trans, &iter, &a->k_i, 0); - bch2_trans_iter_exit(trans, &iter); - - if (ret) - return ret; - - if (!p.ptr.cached) { - ret = bch2_bucket_backpointer_mod(trans, bucket, bp, k, insert); - if (ret) - return ret; - } - } - - if (flags & BTREE_TRIGGER_GC) { - struct bch_fs *c = trans->c; - struct bch_dev *ca = bch_dev_bkey_exists(c, p.ptr.dev); - enum bch_data_type data_type = bkey_ptr_data_type(btree_id, level, k, p); - - percpu_down_read(&c->mark_lock); - struct bucket *g = PTR_GC_BUCKET(ca, &p.ptr); - bucket_lock(g); - struct bucket old = *g; - - u8 bucket_data_type = g->data_type; - int ret = __mark_pointer(trans, k, &p.ptr, *sectors, - data_type, g->gen, - &bucket_data_type, - &g->dirty_sectors, - &g->cached_sectors); - if (ret) { - bucket_unlock(g); - percpu_up_read(&c->mark_lock); - return ret; - } - - g->data_type = bucket_data_type; - struct bucket new = *g; - bucket_unlock(g); - bch2_dev_usage_update_m(c, ca, &old, &new); - percpu_up_read(&c->mark_lock); - } - - return 0; -} - -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, unsigned flags) -{ - 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 = -EIO; - goto err; - } - - stripe_blockcount_set(&s->v, p.ec.block, - stripe_blockcount_get(&s->v, p.ec.block) + - sectors); - - struct bch_replicas_padded r; - bch2_bkey_to_replicas(&r.e, bkey_i_to_s_c(&s->k_i)); - r.e.data_type = data_type; - ret = bch2_update_replicas_list(trans, &r.e, sectors); -err: - bch2_trans_iter_exit(trans, &iter); - return ret; - } - - if (flags & BTREE_TRIGGER_GC) { - struct bch_fs *c = trans->c; - - BUG_ON(!(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_ENOMEM_mark_stripe_ptr; - } - - mutex_lock(&c->ec_stripes_heap_lock); - - if (!m || !m->alive) { - mutex_unlock(&c->ec_stripes_heap_lock); - struct printbuf buf = PRINTBUF; - bch2_bkey_val_to_text(&buf, c, k); - bch_err_ratelimited(c, "pointer to nonexistent stripe %llu\n while marking %s", - (u64) p.ec.idx, buf.buf); - printbuf_exit(&buf); - bch2_inconsistent_error(c); - return -EIO; - } - - m->block_sectors[p.ec.block] += sectors; - - struct bch_replicas_padded r = m->r; - mutex_unlock(&c->ec_stripes_heap_lock); - - r.e.data_type = data_type; - bch2_update_replicas(c, k, &r.e, sectors, trans->journal_res.seq, true); - } - - return 0; -} - -static int __trigger_extent(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c k, unsigned flags) -{ - bool gc = flags & BTREE_TRIGGER_GC; - struct bch_fs *c = trans->c; - struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k); - const union bch_extent_entry *entry; - struct extent_ptr_decoded p; - struct bch_replicas_padded r; - enum bch_data_type data_type = bkey_is_btree_ptr(k.k) - ? BCH_DATA_btree - : BCH_DATA_user; - s64 dirty_sectors = 0; - int ret = 0; - - r.e.data_type = data_type; - r.e.nr_devs = 0; - r.e.nr_required = 1; - - bkey_for_each_ptr_decode(k.k, ptrs, p, entry) { - s64 disk_sectors; - ret = bch2_trigger_pointer(trans, btree_id, level, k, p, &disk_sectors, flags); - if (ret < 0) - return ret; - - bool stale = ret > 0; - - if (p.ptr.cached) { - if (!stale) { - ret = !gc - ? bch2_update_cached_sectors_list(trans, p.ptr.dev, disk_sectors) - : update_cached_sectors(c, k, p.ptr.dev, disk_sectors, 0, true); - bch2_fs_fatal_err_on(ret && gc, c, "%s(): no replicas entry while updating cached sectors", - __func__); - if (ret) - return ret; - } - } else if (!p.has_ec) { - dirty_sectors += disk_sectors; - r.e.devs[r.e.nr_devs++] = 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: - */ - r.e.nr_required = 0; - } - } - - if (r.e.nr_devs) { - ret = !gc - ? bch2_update_replicas_list(trans, &r.e, dirty_sectors) - : bch2_update_replicas(c, k, &r.e, dirty_sectors, 0, true); - if (unlikely(ret && gc)) { - struct printbuf buf = PRINTBUF; - - bch2_bkey_val_to_text(&buf, c, k); - bch2_fs_fatal_error(c, "%s(): no replicas entry for %s", __func__, buf.buf); - printbuf_exit(&buf); - } - if (ret) - return ret; - } - - return 0; -} - -int bch2_trigger_extent(struct btree_trans *trans, - enum btree_id btree_id, unsigned level, - struct bkey_s_c old, struct bkey_s new, - unsigned flags) -{ - if (flags & BTREE_TRIGGER_TRANSACTIONAL) { - struct bch_fs *c = trans->c; - int mod = (int) bch2_bkey_needs_rebalance(c, new.s_c) - - (int) bch2_bkey_needs_rebalance(c, old); - - if (mod) { - int ret = bch2_btree_bit_mod(trans, BTREE_ID_rebalance_work, new.k->p, mod > 0); - if (ret) - return ret; - } - } - - if (flags & (BTREE_TRIGGER_TRANSACTIONAL|BTREE_TRIGGER_GC)) - return trigger_run_overwrite_then_insert(__trigger_extent, trans, btree_id, level, old, new, flags); - - 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, unsigned flags) -{ - struct bch_fs *c = trans->c; - unsigned replicas = bkey_s_c_to_reservation(k).v->nr_replicas; - s64 sectors = (s64) k.k->size * replicas; - - if (flags & BTREE_TRIGGER_OVERWRITE) - sectors = -sectors; - - if (flags & BTREE_TRIGGER_TRANSACTIONAL) { - int ret = bch2_replicas_deltas_realloc(trans, 0); - if (ret) - return ret; - - struct replicas_delta_list *d = trans->fs_usage_deltas; - replicas = min(replicas, ARRAY_SIZE(d->persistent_reserved)); - - d->persistent_reserved[replicas - 1] += sectors; - } - - if (flags & BTREE_TRIGGER_GC) { - percpu_down_read(&c->mark_lock); - preempt_disable(); - - struct bch_fs_usage *fs_usage = this_cpu_ptr(c->usage_gc); - - replicas = min(replicas, ARRAY_SIZE(fs_usage->persistent_reserved)); - fs_usage->reserved += sectors; - fs_usage->persistent_reserved[replicas - 1] += sectors; - - preempt_enable(); - percpu_up_read(&c->mark_lock); - } - - 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, - unsigned 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, size_t b, - enum bch_data_type type, - unsigned sectors) -{ - struct bch_fs *c = trans->c; - struct btree_iter iter; - struct bkey_i_alloc_v4 *a; - int ret = 0; - - /* - * Backup superblock might be past the end of our normal usable space: - */ - if (b >= ca->mi.nbuckets) - return 0; - - a = bch2_trans_start_alloc_update(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) { - bch2_fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, - BCH_FSCK_ERR_bucket_metadata_type_mismatch, - "bucket %llu:%llu gen %u different types of data in same bucket: %s, %s\n" - "while marking %s", - iter.pos.inode, iter.pos.offset, a->v.gen, - bch2_data_types[a->v.data_type], - bch2_data_types[type], - bch2_data_types[type]); - ret = -EIO; - 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; -} - -int bch2_trans_mark_metadata_bucket(struct btree_trans *trans, - struct bch_dev *ca, size_t b, - enum bch_data_type type, - unsigned sectors) -{ - return commit_do(trans, NULL, NULL, 0, - __bch2_trans_mark_metadata_bucket(trans, ca, b, type, sectors)); -} - -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) -{ - 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); - 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) -{ - struct bch_sb_layout *layout = &ca->disk_sb.sb->layout; - 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); - 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); - if (ret) - return ret; - } - - if (bucket_sectors) { - ret = bch2_trans_mark_metadata_bucket(trans, ca, - bucket, BCH_DATA_sb, bucket_sectors); - 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); - if (ret) - return ret; - } - - return 0; -} - -int bch2_trans_mark_dev_sb(struct bch_fs *c, struct bch_dev *ca) -{ - int ret = bch2_trans_run(c, __bch2_trans_mark_dev_sb(trans, ca)); - - bch_err_fn(c, ret); - return ret; -} - -int bch2_trans_mark_dev_sbs(struct bch_fs *c) -{ - for_each_online_member(c, ca) { - int ret = bch2_trans_mark_dev_sb(c, ca); - if (ret) { - percpu_ref_put(&ca->ref); - return ret; - } - } - - return 0; -} - -/* Disk reservations: */ - -#define SECTORS_CACHE 1024 - -int __bch2_disk_reservation_add(struct bch_fs *c, struct disk_reservation *res, - u64 sectors, int flags) -{ - struct bch_fs_pcpu *pcpu; - u64 old, v, get; - s64 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; - - v = atomic64_read(&c->sectors_available); - do { - old = v; - get = min((u64) sectors + SECTORS_CACHE, old); - - if (get < sectors) { - preempt_enable(); - goto recalculate; - } - } while ((v = atomic64_cmpxchg(&c->sectors_available, - old, old - get)) != old); - - 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 <= 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_ENOSPC_disk_reservation; - } - - mutex_unlock(&c->sectors_available_lock); - percpu_up_read(&c->mark_lock); - - return ret; -} - -/* Startup/shutdown: */ - -static void bucket_gens_free_rcu(struct rcu_head *rcu) -{ - struct bucket_gens *buckets = - container_of(rcu, struct bucket_gens, rcu); - - kvpfree(buckets, sizeof(*buckets) + buckets->nbuckets); -} - -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; - unsigned long *buckets_nouse = NULL; - bool resize = ca->bucket_gens != NULL; - int ret; - - if (!(bucket_gens = kvpmalloc(sizeof(struct bucket_gens) + nbuckets, - GFP_KERNEL|__GFP_ZERO))) { - ret = -BCH_ERR_ENOMEM_bucket_gens; - goto err; - } - - if ((c->opts.buckets_nouse && - !(buckets_nouse = kvpmalloc(BITS_TO_LONGS(nbuckets) * - sizeof(unsigned long), - GFP_KERNEL|__GFP_ZERO)))) { - ret = -BCH_ERR_ENOMEM_buckets_nouse; - goto err; - } - - bucket_gens->first_bucket = ca->mi.first_bucket; - bucket_gens->nbuckets = nbuckets; - - if (resize) { - down_write(&c->gc_lock); - down_write(&ca->bucket_lock); - percpu_down_write(&c->mark_lock); - } - - old_bucket_gens = rcu_dereference_protected(ca->bucket_gens, 1); - - if (resize) { - size_t n = min(bucket_gens->nbuckets, old_bucket_gens->nbuckets); - - memcpy(bucket_gens->b, - old_bucket_gens->b, - n); - if (buckets_nouse) - memcpy(buckets_nouse, - ca->buckets_nouse, - BITS_TO_LONGS(n) * sizeof(unsigned long)); - } - - rcu_assign_pointer(ca->bucket_gens, bucket_gens); - bucket_gens = old_bucket_gens; - - swap(ca->buckets_nouse, buckets_nouse); - - nbuckets = ca->mi.nbuckets; - - if (resize) { - percpu_up_write(&c->mark_lock); - up_write(&ca->bucket_lock); - up_write(&c->gc_lock); - } - - ret = 0; -err: - kvpfree(buckets_nouse, - BITS_TO_LONGS(nbuckets) * sizeof(unsigned long)); - if (bucket_gens) - call_rcu(&bucket_gens->rcu, bucket_gens_free_rcu); - - return ret; -} - -void bch2_dev_buckets_free(struct bch_dev *ca) -{ - unsigned i; - - kvpfree(ca->buckets_nouse, - BITS_TO_LONGS(ca->mi.nbuckets) * sizeof(unsigned long)); - kvpfree(rcu_dereference_protected(ca->bucket_gens, 1), - sizeof(struct bucket_gens) + ca->mi.nbuckets); - - for (i = 0; i < ARRAY_SIZE(ca->usage); i++) - free_percpu(ca->usage[i]); - kfree(ca->usage_base); -} - -int bch2_dev_buckets_alloc(struct bch_fs *c, struct bch_dev *ca) -{ - unsigned i; - - ca->usage_base = kzalloc(sizeof(struct bch_dev_usage), GFP_KERNEL); - if (!ca->usage_base) - return -BCH_ERR_ENOMEM_usage_init; - - for (i = 0; i < ARRAY_SIZE(ca->usage); i++) { - ca->usage[i] = alloc_percpu(struct bch_dev_usage); - if (!ca->usage[i]) - return -BCH_ERR_ENOMEM_usage_init; - } - - return bch2_dev_buckets_resize(c, ca, ca->mi.nbuckets); -} |