--- /dev/null
+// 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);
+}
projects / bcachefs-tools-debian / blobdiff