// 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 "recovery.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)
{
memset(usage, 0, sizeof(*usage));
acc_u64s_percpu((u64 *) usage, (u64 __percpu *) ca->usage, dev_usage_u64s());
}
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 *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 {
*do_update = 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->gen_valid = true;
g->gen = p.ptr.gen;
g->data_type = 0;
g->stripe_sectors = 0;
g->dirty_sectors = 0;
g->cached_sectors = 0;
} else {
*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 (data_type == BCH_DATA_btree) {
g->gen_valid = true;
g->gen = p.ptr.gen;
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;
percpu_down_read(&c->mark_lock);
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) {
if (flags & BTREE_TRIGGER_is_root) {
bch_err(c, "cannot update btree roots yet");
ret = -EINVAL;
goto err;
}
struct bkey_i *new = bch2_bkey_make_mut_noupdate(trans, k);
ret = PTR_ERR_OR_ZERO(new);
if (ret)
goto err;
rcu_read_lock();
bch2_bkey_drop_ptrs(bkey_i_to_s(new), ptr, !bch2_dev_exists(c, ptr->dev));
rcu_read_unlock();
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));
rcu_read_lock();
bkey_for_each_ptr(ptrs, ptr) {
struct bch_dev *ca = bch2_dev_rcu(c, ptr->dev);
struct bucket *g = PTR_GC_BUCKET(ca, ptr);
ptr->gen = g->gen;
}
rcu_read_unlock();
} 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);
}
percpu_up_read(&c->mark_lock);
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(&iter) ?:
bch2_trans_update(trans, &iter, new,
BTREE_UPDATE_internal_snapshot_node|
BTREE_TRIGGER_norun);
bch2_trans_iter_exit(trans, &iter);
percpu_down_read(&c->mark_lock);
if (ret)
goto err;
if (level)
bch2_btree_node_update_key_early(trans, btree, level - 1, k, new);
}
err:
percpu_up_read(&c->mark_lock);
printbuf_exit(&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 (gen_after(ptr->gen, b_gen)) {
bch2_fsck_err(trans, FSCK_CAN_IGNORE|FSCK_NEED_FSCK,
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_type_str(bucket_data_type ?: ptr_data_type),
ptr->gen,
(bch2_bkey_val_to_text(&buf, c, k), buf.buf));
if (inserting)
goto err;
goto out;
}
if (gen_cmp(b_gen, ptr->gen) > BUCKET_GC_GEN_MAX) {
bch2_fsck_err(trans, FSCK_CAN_IGNORE|FSCK_NEED_FSCK,
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_type_str(bucket_data_type ?: ptr_data_type),
ptr->gen,
(printbuf_reset(&buf),
bch2_bkey_val_to_text(&buf, c, k), buf.buf));
if (inserting)
goto err;
goto out;
}
if (b_gen != ptr->gen && ptr->cached) {
ret = 1;
goto out;
}
if (b_gen != ptr->gen) {
bch2_fsck_err(trans, FSCK_CAN_IGNORE|FSCK_NEED_FSCK,
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_get(ca, bucket_nr),
bch2_data_type_str(bucket_data_type ?: ptr_data_type),
ptr->gen,
(printbuf_reset(&buf),
bch2_bkey_val_to_text(&buf, c, k), buf.buf));
if (inserting)
goto err;
goto out;
}
if (bucket_data_type_mismatch(bucket_data_type, ptr_data_type)) {
bch2_fsck_err(trans, FSCK_CAN_IGNORE|FSCK_NEED_FSCK,
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_type_str(bucket_data_type),
bch2_data_type_str(ptr_data_type),
(printbuf_reset(&buf),
bch2_bkey_val_to_text(&buf, c, k), buf.buf));
if (inserting)
goto err;
goto out;
}
if ((u64) *bucket_sectors + sectors > U32_MAX) {
bch2_fsck_err(trans, FSCK_CAN_IGNORE|FSCK_NEED_FSCK,
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_type_str(bucket_data_type ?: ptr_data_type),
*bucket_sectors, sectors,
(printbuf_reset(&buf),
bch2_bkey_val_to_text(&buf, c, k), buf.buf));
if (inserting)
goto err;
sectors = -*bucket_sectors;
}
*bucket_sectors += sectors;
out:
printbuf_exit(&buf);
return ret;
err:
bch2_dump_trans_updates(trans);
ret = -BCH_ERR_bucket_ref_update;
goto out;
}
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)
{
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;
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;
u64 abs_sectors = ptr_disk_sectors(level ? btree_sectors(c) : k.k->size, p);
*sectors = insert ? abs_sectors : -abs_sectors;
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_trigger_pointer;
goto err;
}
struct bpos bucket;
struct bch_backpointer bp;
__bch2_extent_ptr_to_bp(trans->c, ca, btree_id, level, k, p, entry, &bucket, &bp, abs_sectors);
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.data_type, &a->v);
if (ret)
goto err;
if (!p.ptr.cached) {
ret = bch2_bucket_backpointer_mod(trans, ca, bucket, bp, k, insert);
if (ret)
goto err;
}
}
if (flags & BTREE_TRIGGER_gc) {
percpu_down_read(&c->mark_lock);
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_trigger_pointer;
goto err_unlock;
}
bucket_lock(g);
struct bch_alloc_v4 old = bucket_m_to_alloc(*g), new = old;
ret = __mark_pointer(trans, ca, k, &p, *sectors, bp.data_type, &new);
alloc_to_bucket(g, new);
bucket_unlock(g);
err_unlock:
percpu_up_read(&c->mark_lock);
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)
{
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_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 = {
.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 bch_fs *c = trans->c;
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 -BCH_ERR_trigger_stripe_pointer;
}
m->block_sectors[p.ec.block] += sectors;
struct disk_accounting_pos acc = {
.type = BCH_DISK_ACCOUNTING_replicas,
};
memcpy(&acc.replicas, &m->r.e, replicas_entry_bytes(&m->r.e));
mutex_unlock(&c->ec_stripes_heap_lock);
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,
s64 *replicas_sectors)
{
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;
struct disk_accounting_pos acc_replicas_key = {
.type = BCH_DISK_ACCOUNTING_replicas,
.replicas.data_type = data_type,
.replicas.nr_devs = 0,
.replicas.nr_required = 1,
};
struct disk_accounting_pos acct_compression_key = {
.type = BCH_DISK_ACCOUNTING_compression,
};
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 (acct_compression_key.compression.type &&
acct_compression_key.compression.type != p.crc.compression_type) {
if (flags & BTREE_TRIGGER_overwrite)
bch2_u64s_neg(compression_acct, ARRAY_SIZE(compression_acct));
ret = bch2_disk_accounting_mod(trans, &acct_compression_key, compression_acct,
ARRAY_SIZE(compression_acct), gc);
if (ret)
return ret;
compression_acct[0] = 1;
compression_acct[1] = 0;
compression_acct[2] = 0;
}
acct_compression_key.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) {
struct disk_accounting_pos acc_snapshot_key = {
.type = BCH_DISK_ACCOUNTING_snapshot,
.snapshot.id = k.k->p.snapshot,
};
ret = bch2_disk_accounting_mod(trans, &acc_snapshot_key, replicas_sectors, 1, gc);
if (ret)
return ret;
}
if (acct_compression_key.compression.type) {
if (flags & BTREE_TRIGGER_overwrite)
bch2_u64s_neg(compression_acct, ARRAY_SIZE(compression_acct));
ret = bch2_disk_accounting_mod(trans, &acct_compression_key, compression_acct,
ARRAY_SIZE(compression_acct), gc);
if (ret)
return ret;
}
if (level) {
struct disk_accounting_pos acc_btree_key = {
.type = BCH_DISK_ACCOUNTING_btree,
.btree.id = btree_id,
};
ret = bch2_disk_accounting_mod(trans, &acc_btree_key, replicas_sectors, 1, gc);
if (ret)
return ret;
} else {
bool insert = !(flags & BTREE_TRIGGER_overwrite);
struct disk_accounting_pos acc_inum_key = {
.type = BCH_DISK_ACCOUNTING_inum,
.inum.inum = k.k->p.inode,
};
s64 v[3] = {
insert ? 1 : -1,
insert ? k.k->size : -((s64) k.k->size),
*replicas_sectors,
};
ret = bch2_disk_accounting_mod(trans, &acc_inum_key, v, ARRAY_SIZE(v), gc);
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)) {
s64 old_replicas_sectors = 0, new_replicas_sectors = 0;
if (old.k->type) {
int ret = __trigger_extent(trans, btree, level, old,
flags & ~BTREE_TRIGGER_insert,
&old_replicas_sectors);
if (ret)
return ret;
}
if (new.k->type) {
int ret = __trigger_extent(trans, btree, level, new.s_c,
flags & ~BTREE_TRIGGER_overwrite,
&new_replicas_sectors);
if (ret)
return ret;
}
int need_rebalance_delta = 0;
s64 need_rebalance_sectors_delta = 0;
s64 s = bch2_bkey_sectors_need_rebalance(c, old);
need_rebalance_delta -= s != 0;
need_rebalance_sectors_delta -= s;
s = bch2_bkey_sectors_need_rebalance(c, new.s_c);
need_rebalance_delta += s != 0;
need_rebalance_sectors_delta += 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) {
struct disk_accounting_pos acc = {
.type = BCH_DISK_ACCOUNTING_rebalance_work,
};
int ret = bch2_disk_accounting_mod(trans, &acc, &need_rebalance_sectors_delta, 1,
flags & BTREE_TRIGGER_gc);
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 = k.k->size;
if (flags & BTREE_TRIGGER_overwrite)
sectors = -sectors;
struct disk_accounting_pos acc = {
.type = BCH_DISK_ACCOUNTING_persistent_reserved,
.persistent_reserved.nr_replicas = bkey_s_c_to_reservation(k).v->nr_replicas,
};
return bch2_disk_accounting_mod(trans, &acc, §ors, 1, flags & BTREE_TRIGGER_gc);
}
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 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) {
bch2_fsck_err(trans, FSCK_CAN_IGNORE|FSCK_NEED_FSCK,
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_type_str(a->v.data_type),
bch2_data_type_str(type),
bch2_data_type_str(type));
ret = -BCH_ERR_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;
percpu_down_read(&c->mark_lock);
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_unlock;
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;
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;
g->data_type = data_type;
g->dirty_sectors += sectors;
struct bch_alloc_v4 new = bucket_m_to_alloc(*g);
bucket_unlock(g);
percpu_up_read(&c->mark_lock);
ret = bch2_alloc_key_to_dev_counters(trans, ca, &old, &new, flags);
return ret;
err:
bucket_unlock(g);
err_unlock:
percpu_up_read(&c->mark_lock);
return -BCH_ERR_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) {
int ret = bch2_trans_mark_dev_sb(c, ca, flags);
if (ret) {
percpu_ref_put(&ca->io_ref);
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);
}
/* 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, 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;
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 <= 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: */
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 = 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_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;
BUG_ON(resize && ca->buckets_nouse);
if (!(bucket_gens = kvmalloc(sizeof(struct bucket_gens) + nbuckets,
GFP_KERNEL|__GFP_ZERO))) {
ret = -BCH_ERR_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;
if (resize) {
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);
}
rcu_assign_pointer(ca->bucket_gens, bucket_gens);
bucket_gens = old_bucket_gens;
nbuckets = ca->mi.nbuckets;
if (resize) {
percpu_up_write(&c->mark_lock);
up_write(&ca->bucket_lock);
}
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);
if (!ca->usage)
return -BCH_ERR_ENOMEM_usage_init;
return bch2_dev_buckets_resize(c, ca, ca->mi.nbuckets);
}
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