linux/fs/bcachefs/buckets.c
Kent Overstreet df94cb2e57 bcachefs: Fix an integer overflow
Fixes:

bcachefs (e7fdc10e-54a3-49d9-bd0c-390370889d84): disk usage increased 4294967296 more than 2823707312 sectors reserved)
transaction updates for __bchfs_fallocate journal seq 467859
  update: btree=extents cached=0 bch2_trans_update+0x4e8/0x540
    old u64s 5 type deleted 536925940:3559337304:4294967283 len 0 ver 0
    new u64s 6 type reservation 536925940:3559337304:4294967283 len 3559337304 ver 0: generation 0 replicas 2
  update: btree=inodes cached=1 bch2_extent_update_i_size_sectors+0x305/0x3b0
    old u64s 19 type inode_v3 0:536925940:4294967283 len 0 ver 0: mode 100600 flags 15300000 journal_seq 467859 bi_size 0 bi_sectors 0 bi_version 0 bi_atime 40905301656446 bi_ctime 40905301656446 bi_mtime 40905301656446 bi_otime 40905301656446 bi_uid 0 bi_gid 0 bi_nlink 0 bi_generation 0 bi_dev 0 bi_data_checksum 0 bi_compression 0 bi_project 0 bi_background_compression 0 bi_data_replicas 0 bi_promote_target 0 bi_foreground_target 0 bi_background_target 0 bi_erasure_code 0 bi_fields_set 0 bi_dir 1879048193 bi_dir_offset 3384856038735393365 bi_subvol 0 bi_parent_subvol 0 bi_nocow 0
    new u64s 19 type inode_v3 0:536925940:4294967283 len 0 ver 0: mode 100600 flags 15300000 journal_seq 467859 bi_size 0 bi_sectors 3559337304 bi_version 0 bi_atime 40905301656446 bi_ctime 40905301656446 bi_mtime 40905301656446 bi_otime 40905301656446 bi_uid 0 bi_gid 0 bi_nlink 0 bi_generation 0 bi_dev 0 bi_data_checksum 0 bi_compression 0 bi_project 0 bi_background_compression 0 bi_data_replicas 0 bi_promote_target 0 bi_foreground_target 0 bi_background_target 0 bi_erasure_code 0 bi_fields_set 0 bi_dir 1879048193 bi_dir_offset 3384856038735393365 bi_subvol 0 bi_parent_subvol 0 bi_nocow 0

Kernel panic - not syncing: bcachefs (e7fdc10e-54a3-49d9-bd0c-390370889d84): panic after error
CPU: 4 PID: 5154 Comm: rsync Not tainted 6.5.9-gateway-gca1614174cc0-dirty #1
Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X570 Phantom Gaming 4, BIOS P4.20 08/02/2021
Call Trace:
 <TASK>
 dump_stack_lvl+0x5a/0x90
 panic+0x105/0x300
 ? console_unlock+0xf1/0x130
 ? bch2_printbuf_exit+0x16/0x30
 ? srso_return_thunk+0x5/0x10
 bch2_inconsistent_error+0x6f/0x80
 bch2_trans_fs_usage_apply+0x279/0x3d0
 __bch2_trans_commit+0x112a/0x1df0
 ? bch2_extent_update+0x13a/0x1d0
 bch2_extent_update+0x13a/0x1d0
 bch2_extent_fallocate+0x58e/0x740
 bch2_fallocate_dispatch+0xb7c/0x1030
 ? do_filp_open+0xa0/0x140
 vfs_fallocate+0x18e/0x1d0
 __x64_sys_fallocate+0x46/0x70
 do_syscall_64+0x48/0xa0
 ? exit_to_user_mode_prepare+0x4d/0xa0
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7fc85d91bbb3
Code: 64 89 02 b8 ff ff ff ff eb bd 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 80 3d 31 da 0d 00 00 49 89 ca 74 14 b8 1d 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5d c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 10

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-11-01 21:11:08 -04:00

2169 lines
54 KiB
C

// 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)
{
struct bch_fs_usage *usage;
struct bch_dev *ca;
unsigned i;
percpu_down_write(&c->mark_lock);
usage = c->usage_base;
for (i = 0; i < ARRAY_SIZE(c->usage); i++)
bch2_fs_usage_acc_to_base(c, i);
for (i = 0; i < BCH_REPLICAS_MAX; i++)
usage->reserved += usage->persistent_reserved[i];
for (i = 0; i < c->replicas.nr; i++) {
struct bch_replicas_entry *e =
cpu_replicas_entry(&c->replicas, i);
fs_usage_data_type_to_base(usage, e->data_type, usage->replicas[i]);
}
for_each_member_device(ca, c, i) {
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)
{
struct bch_dev *ca;
unsigned i, 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(ca, c, i, 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 *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;
}
static inline int bucket_sectors_fragmented(struct bch_dev *ca,
struct bch_alloc_v4 a)
{
return a.dirty_sectors
? max(0, (int) ca->mi.bucket_size - (int) a.dirty_sectors)
: 0;
}
static void bch2_dev_usage_update(struct bch_fs *c, struct bch_dev *ca,
struct bch_alloc_v4 old,
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->buckets_ec -= (int) !!old.stripe;
u->buckets_ec += (int) !!new.stripe;
u->d[old.data_type].sectors -= old.dirty_sectors;
u->d[new.data_type].sectors += new.dirty_sectors;
u->d[BCH_DATA_cached].sectors += new.cached_sectors;
u->d[BCH_DATA_cached].sectors -= old.cached_sectors;
u->d[old.data_type].fragmented -= bucket_sectors_fragmented(ca, old);
u->d[new.data_type].fragmented += bucket_sectors_fragmented(ca, new);
preempt_enable();
}
static void bch2_dev_usage_update_m(struct bch_fs *c, struct bch_dev *ca,
struct bucket old, struct bucket new,
u64 journal_seq, bool gc)
{
struct bch_alloc_v4 old_a = {
.gen = old.gen,
.data_type = old.data_type,
.dirty_sectors = old.dirty_sectors,
.cached_sectors = old.cached_sectors,
.stripe = old.stripe,
};
struct bch_alloc_v4 new_a = {
.gen = new.gen,
.data_type = new.data_type,
.dirty_sectors = new.dirty_sectors,
.cached_sectors = new.cached_sectors,
.stripe = new.stripe,
};
bch2_dev_usage_update(c, ca, old_a, new_a, journal_seq, gc);
}
static inline int __update_replicas(struct bch_fs *c,
struct bch_fs_usage *fs_usage,
struct bch_replicas_entry *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;
}
static inline int update_replicas(struct bch_fs *c, struct bkey_s_c k,
struct bch_replicas_entry *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 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));
}
static inline int update_replicas_list(struct btree_trans *trans,
struct bch_replicas_entry *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;
}
static inline int 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 update_replicas_list(trans, &r.e, sectors);
}
int bch2_mark_alloc(struct btree_trans *trans,
enum btree_id btree, unsigned level,
struct bkey_s_c old, struct bkey_s_c new,
unsigned flags)
{
bool gc = flags & BTREE_TRIGGER_GC;
u64 journal_seq = trans->journal_res.seq;
u64 bucket_journal_seq;
struct bch_fs *c = trans->c;
struct bch_alloc_v4 old_a_convert, new_a_convert;
const struct bch_alloc_v4 *old_a, *new_a;
struct bch_dev *ca;
int ret = 0;
/*
* alloc btree is read in by bch2_alloc_read, not gc:
*/
if ((flags & BTREE_TRIGGER_GC) &&
!(flags & BTREE_TRIGGER_BUCKET_INVALIDATE))
return 0;
if (bch2_trans_inconsistent_on(!bch2_dev_bucket_exists(c, new.k->p), trans,
"alloc key for invalid device or bucket"))
return -EIO;
ca = bch_dev_bkey_exists(c, new.k->p.inode);
old_a = bch2_alloc_to_v4(old, &old_a_convert);
new_a = bch2_alloc_to_v4(new, &new_a_convert);
bucket_journal_seq = new_a->journal_seq;
if ((flags & BTREE_TRIGGER_INSERT) &&
data_type_is_empty(old_a->data_type) !=
data_type_is_empty(new_a->data_type) &&
new.k->type == KEY_TYPE_alloc_v4) {
struct bch_alloc_v4 *v = (struct bch_alloc_v4 *) new.v;
EBUG_ON(!journal_seq);
/*
* If the btree updates referring to a bucket weren't flushed
* before the bucket became empty again, then the we don't have
* to wait on a journal flush before we can reuse the bucket:
*/
v->journal_seq = bucket_journal_seq =
data_type_is_empty(new_a->data_type) &&
(journal_seq == v->journal_seq ||
bch2_journal_noflush_seq(&c->journal, v->journal_seq))
? 0 : journal_seq;
}
if (!data_type_is_empty(old_a->data_type) &&
data_type_is_empty(new_a->data_type) &&
bucket_journal_seq) {
ret = bch2_set_bucket_needs_journal_commit(&c->buckets_waiting_for_journal,
c->journal.flushed_seq_ondisk,
new.k->p.inode, new.k->p.offset,
bucket_journal_seq);
if (ret) {
bch2_fs_fatal_error(c,
"error setting bucket_needs_journal_commit: %i", ret);
return ret;
}
}
percpu_down_read(&c->mark_lock);
if (!gc && new_a->gen != old_a->gen)
*bucket_gen(ca, new.k->p.offset) = new_a->gen;
bch2_dev_usage_update(c, ca, *old_a, *new_a, journal_seq, gc);
if (gc) {
struct bucket *g = gc_bucket(ca, new.k->p.offset);
bucket_lock(g);
g->gen_valid = 1;
g->gen = new_a->gen;
g->data_type = new_a->data_type;
g->stripe = new_a->stripe;
g->stripe_redundancy = new_a->stripe_redundancy;
g->dirty_sectors = new_a->dirty_sectors;
g->cached_sectors = new_a->cached_sectors;
bucket_unlock(g);
}
percpu_up_read(&c->mark_lock);
/*
* need to know if we're getting called from the invalidate path or
* not:
*/
if ((flags & BTREE_TRIGGER_BUCKET_INVALIDATE) &&
old_a->cached_sectors) {
ret = update_cached_sectors(c, new, ca->dev_idx,
-((s64) old_a->cached_sectors),
journal_seq, gc);
if (ret) {
bch2_fs_fatal_error(c, "%s(): no replicas entry while updating cached sectors",
__func__);
return ret;
}
}
if (new_a->data_type == BCH_DATA_free &&
(!new_a->journal_seq || new_a->journal_seq < c->journal.flushed_seq_ondisk))
closure_wake_up(&c->freelist_wait);
if (new_a->data_type == BCH_DATA_need_discard &&
(!bucket_journal_seq || bucket_journal_seq < c->journal.flushed_seq_ondisk))
bch2_do_discards(c);
if (old_a->data_type != BCH_DATA_cached &&
new_a->data_type == BCH_DATA_cached &&
should_invalidate_buckets(ca, bch2_dev_usage_read(ca)))
bch2_do_invalidates(c);
if (new_a->data_type == BCH_DATA_need_gc_gens)
bch2_do_gc_gens(c);
return 0;
}
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, 0, true);
percpu_up_read(&c->mark_lock);
return ret;
}
static int 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 dirty_sectors, u32 cached_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);
u32 bucket_sectors = !ptr->cached
? dirty_sectors
: cached_sectors;
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;
}
static int mark_stripe_bucket(struct btree_trans *trans,
struct bkey_s_c k,
unsigned ptr_idx,
unsigned flags)
{
struct bch_fs *c = trans->c;
u64 journal_seq = trans->journal_res.seq;
const struct bch_stripe *s = bkey_s_c_to_stripe(k).v;
unsigned nr_data = s->nr_blocks - s->nr_redundant;
bool parity = ptr_idx >= nr_data;
enum bch_data_type data_type = parity ? BCH_DATA_parity : BCH_DATA_stripe;
s64 sectors = parity ? le16_to_cpu(s->sectors) : 0;
const struct bch_extent_ptr *ptr = s->ptrs + ptr_idx;
struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
struct bucket old, new, *g;
struct printbuf buf = PRINTBUF;
int ret = 0;
BUG_ON(!(flags & BTREE_TRIGGER_GC));
/* * XXX doesn't handle deletion */
percpu_down_read(&c->mark_lock);
g = PTR_GC_BUCKET(ca, ptr);
if (g->dirty_sectors ||
(g->stripe && g->stripe != k.k->p.offset)) {
bch2_fs_inconsistent(c,
"bucket %u:%zu gen %u: multiple stripes using same bucket\n%s",
ptr->dev, PTR_BUCKET_NR(ca, ptr), g->gen,
(bch2_bkey_val_to_text(&buf, c, k), buf.buf));
ret = -EINVAL;
goto err;
}
bucket_lock(g);
old = *g;
ret = check_bucket_ref(trans, k, ptr, sectors, data_type,
g->gen, g->data_type,
g->dirty_sectors, g->cached_sectors);
if (ret)
goto err;
g->data_type = data_type;
g->dirty_sectors += sectors;
g->stripe = k.k->p.offset;
g->stripe_redundancy = s->nr_redundant;
new = *g;
err:
bucket_unlock(g);
if (!ret)
bch2_dev_usage_update_m(c, ca, old, new, journal_seq, true);
percpu_up_read(&c->mark_lock);
printbuf_exit(&buf);
return ret;
}
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 = check_bucket_ref(trans, k, ptr, sectors, ptr_data_type,
bucket_gen, *bucket_data_type,
*dirty_sectors, *cached_sectors);
if (ret)
return ret;
*dst_sectors += sectors;
*bucket_data_type = *dirty_sectors || *cached_sectors
? ptr_data_type : 0;
return 0;
}
static int bch2_mark_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)
{
u64 journal_seq = trans->journal_res.seq;
struct bch_fs *c = trans->c;
struct bch_dev *ca = bch_dev_bkey_exists(c, p.ptr.dev);
struct bucket old, new, *g;
enum bch_data_type data_type = bkey_ptr_data_type(btree_id, level, k, p);
u8 bucket_data_type;
int ret = 0;
BUG_ON(!(flags & BTREE_TRIGGER_GC));
percpu_down_read(&c->mark_lock);
g = PTR_GC_BUCKET(ca, &p.ptr);
bucket_lock(g);
old = *g;
bucket_data_type = g->data_type;
ret = __mark_pointer(trans, k, &p.ptr, sectors,
data_type, g->gen,
&bucket_data_type,
&g->dirty_sectors,
&g->cached_sectors);
if (!ret)
g->data_type = bucket_data_type;
new = *g;
bucket_unlock(g);
if (!ret)
bch2_dev_usage_update_m(c, ca, old, new, journal_seq, true);
percpu_up_read(&c->mark_lock);
return ret;
}
static int bch2_mark_stripe_ptr(struct btree_trans *trans,
struct bkey_s_c k,
struct bch_extent_stripe_ptr p,
enum bch_data_type data_type,
s64 sectors,
unsigned flags)
{
struct bch_fs *c = trans->c;
struct bch_replicas_padded r;
struct gc_stripe *m;
BUG_ON(!(flags & BTREE_TRIGGER_GC));
m = genradix_ptr_alloc(&c->gc_stripes, p.idx, GFP_KERNEL);
if (!m) {
bch_err(c, "error allocating memory for gc_stripes, idx %llu",
(u64) p.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);
bch_err_ratelimited(c, "pointer to nonexistent stripe %llu",
(u64) p.idx);
bch2_inconsistent_error(c);
return -EIO;
}
m->block_sectors[p.block] += sectors;
r = m->r;
mutex_unlock(&c->ec_stripes_heap_lock);
r.e.data_type = data_type;
update_replicas(c, k, &r.e, sectors, trans->journal_res.seq, true);
return 0;
}
static int __mark_extent(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c k, unsigned flags)
{
u64 journal_seq = trans->journal_res.seq;
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 sectors = bkey_is_btree_ptr(k.k)
? btree_sectors(c)
: k.k->size;
s64 dirty_sectors = 0;
bool stale;
int ret;
BUG_ON(!(flags & BTREE_TRIGGER_GC));
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 = ptr_disk_sectors(sectors, p);
if (flags & BTREE_TRIGGER_OVERWRITE)
disk_sectors = -disk_sectors;
ret = bch2_mark_pointer(trans, btree_id, level, k, p, disk_sectors, flags);
if (ret < 0)
return ret;
stale = ret > 0;
if (p.ptr.cached) {
if (!stale) {
ret = update_cached_sectors(c, k, p.ptr.dev,
disk_sectors, journal_seq, true);
if (ret) {
bch2_fs_fatal_error(c, "%s(): no replicas entry while updating cached sectors",
__func__);
return ret;
}
}
} else if (!p.has_ec) {
dirty_sectors += disk_sectors;
r.e.devs[r.e.nr_devs++] = p.ptr.dev;
} else {
ret = bch2_mark_stripe_ptr(trans, k, p.ec, 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 = update_replicas(c, k, &r.e, dirty_sectors, journal_seq, true);
if (ret) {
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);
return ret;
}
}
return 0;
}
int bch2_mark_extent(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old, struct bkey_s_c new,
unsigned flags)
{
return mem_trigger_run_overwrite_then_insert(__mark_extent, trans, btree_id, level, old, new, flags);
}
int bch2_mark_stripe(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old, struct bkey_s_c new,
unsigned flags)
{
bool gc = flags & BTREE_TRIGGER_GC;
u64 journal_seq = trans->journal_res.seq;
struct bch_fs *c = trans->c;
u64 idx = new.k->p.offset;
const struct bch_stripe *old_s = old.k->type == KEY_TYPE_stripe
? bkey_s_c_to_stripe(old).v : NULL;
const struct bch_stripe *new_s = new.k->type == KEY_TYPE_stripe
? bkey_s_c_to_stripe(new).v : NULL;
unsigned i;
int ret;
BUG_ON(gc && old_s);
if (!gc) {
struct stripe *m = genradix_ptr(&c->stripes, idx);
if (!m) {
struct printbuf buf1 = PRINTBUF;
struct printbuf buf2 = PRINTBUF;
bch2_bkey_val_to_text(&buf1, c, old);
bch2_bkey_val_to_text(&buf2, c, new);
bch_err_ratelimited(c, "error marking nonexistent stripe %llu while marking\n"
"old %s\n"
"new %s", idx, buf1.buf, buf2.buf);
printbuf_exit(&buf2);
printbuf_exit(&buf1);
bch2_inconsistent_error(c);
return -1;
}
if (!new_s) {
bch2_stripes_heap_del(c, m, idx);
memset(m, 0, sizeof(*m));
} else {
m->sectors = le16_to_cpu(new_s->sectors);
m->algorithm = new_s->algorithm;
m->nr_blocks = new_s->nr_blocks;
m->nr_redundant = new_s->nr_redundant;
m->blocks_nonempty = 0;
for (i = 0; i < new_s->nr_blocks; i++)
m->blocks_nonempty += !!stripe_blockcount_get(new_s, i);
if (!old_s)
bch2_stripes_heap_insert(c, m, idx);
else
bch2_stripes_heap_update(c, m, idx);
}
} else {
struct gc_stripe *m =
genradix_ptr_alloc(&c->gc_stripes, idx, GFP_KERNEL);
if (!m) {
bch_err(c, "error allocating memory for gc_stripes, idx %llu",
idx);
return -BCH_ERR_ENOMEM_mark_stripe;
}
/*
* This will be wrong when we bring back runtime gc: we should
* be unmarking the old key and then marking the new key
*/
m->alive = true;
m->sectors = le16_to_cpu(new_s->sectors);
m->nr_blocks = new_s->nr_blocks;
m->nr_redundant = new_s->nr_redundant;
for (i = 0; i < new_s->nr_blocks; i++)
m->ptrs[i] = new_s->ptrs[i];
bch2_bkey_to_replicas(&m->r.e, new);
/*
* gc recalculates this field from stripe ptr
* references:
*/
memset(m->block_sectors, 0, sizeof(m->block_sectors));
for (i = 0; i < new_s->nr_blocks; i++) {
ret = mark_stripe_bucket(trans, new, i, flags);
if (ret)
return ret;
}
ret = update_replicas(c, new, &m->r.e,
((s64) m->sectors * m->nr_redundant),
journal_seq, gc);
if (ret) {
struct printbuf buf = PRINTBUF;
bch2_bkey_val_to_text(&buf, c, new);
bch2_fs_fatal_error(c, "no replicas entry for %s", buf.buf);
printbuf_exit(&buf);
return ret;
}
}
return 0;
}
static int __mark_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;
struct bch_fs_usage *fs_usage;
unsigned replicas = bkey_s_c_to_reservation(k).v->nr_replicas;
s64 sectors = (s64) k.k->size;
BUG_ON(!(flags & BTREE_TRIGGER_GC));
if (flags & BTREE_TRIGGER_OVERWRITE)
sectors = -sectors;
sectors *= replicas;
percpu_down_read(&c->mark_lock);
preempt_disable();
fs_usage = fs_usage_ptr(c, trans->journal_res.seq, flags & BTREE_TRIGGER_GC);
replicas = clamp_t(unsigned, replicas, 1,
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_mark_reservation(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old, struct bkey_s_c new,
unsigned flags)
{
return mem_trigger_run_overwrite_then_insert(__mark_reservation, trans, btree_id, level, old, new, flags);
}
static s64 __bch2_mark_reflink_p(struct btree_trans *trans,
struct bkey_s_c_reflink_p p,
u64 start, u64 end,
u64 *idx, unsigned flags, size_t r_idx)
{
struct bch_fs *c = trans->c;
struct reflink_gc *r;
int add = !(flags & BTREE_TRIGGER_OVERWRITE) ? 1 : -1;
u64 next_idx = end;
s64 ret = 0;
struct printbuf buf = PRINTBUF;
if (r_idx >= c->reflink_gc_nr)
goto not_found;
r = genradix_ptr(&c->reflink_gc_table, r_idx);
next_idx = min(next_idx, r->offset - r->size);
if (*idx < next_idx)
goto not_found;
BUG_ON((s64) r->refcount + add < 0);
r->refcount += add;
*idx = r->offset;
return 0;
not_found:
if (fsck_err(c, reflink_p_to_missing_reflink_v,
"pointer to missing indirect extent\n"
" %s\n"
" missing range %llu-%llu",
(bch2_bkey_val_to_text(&buf, c, p.s_c), buf.buf),
*idx, next_idx)) {
struct bkey_i_error *new;
new = bch2_trans_kmalloc(trans, sizeof(*new));
ret = PTR_ERR_OR_ZERO(new);
if (ret)
goto err;
bkey_init(&new->k);
new->k.type = KEY_TYPE_error;
new->k.p = bkey_start_pos(p.k);
new->k.p.offset += *idx - start;
bch2_key_resize(&new->k, next_idx - *idx);
ret = bch2_btree_insert_trans(trans, BTREE_ID_extents, &new->k_i,
BTREE_TRIGGER_NORUN);
}
*idx = next_idx;
err:
fsck_err:
printbuf_exit(&buf);
return ret;
}
static int __mark_reflink_p(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c k, unsigned flags)
{
struct bch_fs *c = trans->c;
struct bkey_s_c_reflink_p p = bkey_s_c_to_reflink_p(k);
struct reflink_gc *ref;
size_t l, r, m;
u64 idx = le64_to_cpu(p.v->idx), start = idx;
u64 end = le64_to_cpu(p.v->idx) + p.k->size;
int ret = 0;
BUG_ON(!(flags & BTREE_TRIGGER_GC));
if (c->sb.version_upgrade_complete >= bcachefs_metadata_version_reflink_p_fix) {
idx -= le32_to_cpu(p.v->front_pad);
end += le32_to_cpu(p.v->back_pad);
}
l = 0;
r = c->reflink_gc_nr;
while (l < r) {
m = l + (r - l) / 2;
ref = genradix_ptr(&c->reflink_gc_table, m);
if (ref->offset <= idx)
l = m + 1;
else
r = m;
}
while (idx < end && !ret)
ret = __bch2_mark_reflink_p(trans, p, start, end,
&idx, flags, l++);
return ret;
}
int bch2_mark_reflink_p(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old, struct bkey_s_c new,
unsigned flags)
{
return mem_trigger_run_overwrite_then_insert(__mark_reflink_p, trans, btree_id, level, old, new, flags);
}
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;
}
/* trans_mark: */
static inline int bch2_trans_mark_pointer(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c k, struct extent_ptr_decoded p,
unsigned flags)
{
bool insert = !(flags & BTREE_TRIGGER_OVERWRITE);
struct btree_iter iter;
struct bkey_i_alloc_v4 *a;
struct bpos bucket;
struct bch_backpointer bp;
s64 sectors;
int ret;
bch2_extent_ptr_to_bp(trans->c, btree_id, level, k, p, &bucket, &bp);
sectors = bp.bucket_len;
if (!insert)
sectors = -sectors;
a = bch2_trans_start_alloc_update(trans, &iter, bucket);
if (IS_ERR(a))
return PTR_ERR(a);
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;
}
return 0;
}
static int bch2_trans_mark_stripe_ptr(struct btree_trans *trans,
struct extent_ptr_decoded p,
s64 sectors, enum bch_data_type data_type)
{
struct btree_iter iter;
struct bkey_i_stripe *s;
struct bch_replicas_padded r;
int ret = 0;
s = bch2_bkey_get_mut_typed(trans, &iter,
BTREE_ID_stripes, POS(0, p.ec.idx),
BTREE_ITER_WITH_UPDATES, stripe);
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);
bch2_bkey_to_replicas(&r.e, bkey_i_to_s_c(&s->k_i));
r.e.data_type = data_type;
ret = update_replicas_list(trans, &r.e, sectors);
err:
bch2_trans_iter_exit(trans, &iter);
return ret;
}
static int __trans_mark_extent(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c k, unsigned flags)
{
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 sectors = bkey_is_btree_ptr(k.k)
? btree_sectors(c)
: k.k->size;
s64 dirty_sectors = 0;
bool stale;
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 = ptr_disk_sectors(sectors, p);
if (flags & BTREE_TRIGGER_OVERWRITE)
disk_sectors = -disk_sectors;
ret = bch2_trans_mark_pointer(trans, btree_id, level, k, p, flags);
if (ret < 0)
return ret;
stale = ret > 0;
if (p.ptr.cached) {
if (!stale) {
ret = update_cached_sectors_list(trans, p.ptr.dev,
disk_sectors);
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_trans_mark_stripe_ptr(trans, p,
disk_sectors, data_type);
if (ret)
return ret;
r.e.nr_required = 0;
}
}
if (r.e.nr_devs)
ret = update_replicas_list(trans, &r.e, dirty_sectors);
return ret;
}
int bch2_trans_mark_extent(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old, struct bkey_i *new,
unsigned flags)
{
struct bch_fs *c = trans->c;
int mod = (int) bch2_bkey_needs_rebalance(c, bkey_i_to_s_c(new)) -
(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;
}
return trigger_run_overwrite_then_insert(__trans_mark_extent, trans, btree_id, level, old, new, flags);
}
static int bch2_trans_mark_stripe_bucket(struct btree_trans *trans,
struct bkey_s_c_stripe s,
unsigned idx, bool deleting)
{
struct bch_fs *c = trans->c;
const struct bch_extent_ptr *ptr = &s.v->ptrs[idx];
struct btree_iter iter;
struct bkey_i_alloc_v4 *a;
enum bch_data_type data_type = idx >= s.v->nr_blocks - s.v->nr_redundant
? BCH_DATA_parity : 0;
s64 sectors = data_type ? le16_to_cpu(s.v->sectors) : 0;
int ret = 0;
if (deleting)
sectors = -sectors;
a = bch2_trans_start_alloc_update(trans, &iter, PTR_BUCKET_POS(c, ptr));
if (IS_ERR(a))
return PTR_ERR(a);
ret = check_bucket_ref(trans, s.s_c, ptr, sectors, data_type,
a->v.gen, a->v.data_type,
a->v.dirty_sectors, a->v.cached_sectors);
if (ret)
goto err;
if (!deleting) {
if (bch2_trans_inconsistent_on(a->v.stripe ||
a->v.stripe_redundancy, trans,
"bucket %llu:%llu gen %u data type %s dirty_sectors %u: multiple stripes using same bucket (%u, %llu)",
iter.pos.inode, iter.pos.offset, a->v.gen,
bch2_data_types[a->v.data_type],
a->v.dirty_sectors,
a->v.stripe, s.k->p.offset)) {
ret = -EIO;
goto err;
}
if (bch2_trans_inconsistent_on(data_type && a->v.dirty_sectors, trans,
"bucket %llu:%llu gen %u data type %s dirty_sectors %u: data already in stripe bucket %llu",
iter.pos.inode, iter.pos.offset, a->v.gen,
bch2_data_types[a->v.data_type],
a->v.dirty_sectors,
s.k->p.offset)) {
ret = -EIO;
goto err;
}
a->v.stripe = s.k->p.offset;
a->v.stripe_redundancy = s.v->nr_redundant;
a->v.data_type = BCH_DATA_stripe;
} else {
if (bch2_trans_inconsistent_on(a->v.stripe != s.k->p.offset ||
a->v.stripe_redundancy != s.v->nr_redundant, trans,
"bucket %llu:%llu gen %u: not marked as stripe when deleting stripe %llu (got %u)",
iter.pos.inode, iter.pos.offset, a->v.gen,
s.k->p.offset, a->v.stripe)) {
ret = -EIO;
goto err;
}
a->v.stripe = 0;
a->v.stripe_redundancy = 0;
a->v.data_type = alloc_data_type(a->v, BCH_DATA_user);
}
a->v.dirty_sectors += sectors;
if (data_type)
a->v.data_type = !deleting ? data_type : 0;
ret = bch2_trans_update(trans, &iter, &a->k_i, 0);
if (ret)
goto err;
err:
bch2_trans_iter_exit(trans, &iter);
return ret;
}
int bch2_trans_mark_stripe(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old, struct bkey_i *new,
unsigned flags)
{
const struct bch_stripe *old_s = NULL;
struct bch_stripe *new_s = NULL;
struct bch_replicas_padded r;
unsigned i, nr_blocks;
int ret = 0;
if (old.k->type == KEY_TYPE_stripe)
old_s = bkey_s_c_to_stripe(old).v;
if (new->k.type == KEY_TYPE_stripe)
new_s = &bkey_i_to_stripe(new)->v;
/*
* If the pointers aren't changing, we don't need to do anything:
*/
if (new_s && old_s &&
new_s->nr_blocks == old_s->nr_blocks &&
new_s->nr_redundant == old_s->nr_redundant &&
!memcmp(old_s->ptrs, new_s->ptrs,
new_s->nr_blocks * sizeof(struct bch_extent_ptr)))
return 0;
BUG_ON(new_s && old_s &&
(new_s->nr_blocks != old_s->nr_blocks ||
new_s->nr_redundant != old_s->nr_redundant));
nr_blocks = new_s ? new_s->nr_blocks : old_s->nr_blocks;
if (new_s) {
s64 sectors = le16_to_cpu(new_s->sectors);
bch2_bkey_to_replicas(&r.e, bkey_i_to_s_c(new));
ret = update_replicas_list(trans, &r.e, sectors * new_s->nr_redundant);
if (ret)
return ret;
}
if (old_s) {
s64 sectors = -((s64) le16_to_cpu(old_s->sectors));
bch2_bkey_to_replicas(&r.e, old);
ret = update_replicas_list(trans, &r.e, sectors * old_s->nr_redundant);
if (ret)
return ret;
}
for (i = 0; i < nr_blocks; i++) {
if (new_s && old_s &&
!memcmp(&new_s->ptrs[i],
&old_s->ptrs[i],
sizeof(new_s->ptrs[i])))
continue;
if (new_s) {
ret = bch2_trans_mark_stripe_bucket(trans,
bkey_i_to_s_c_stripe(new), i, false);
if (ret)
break;
}
if (old_s) {
ret = bch2_trans_mark_stripe_bucket(trans,
bkey_s_c_to_stripe(old), i, true);
if (ret)
break;
}
}
return ret;
}
static int __trans_mark_reservation(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c k, unsigned flags)
{
unsigned replicas = bkey_s_c_to_reservation(k).v->nr_replicas;
s64 sectors = (s64) k.k->size;
struct replicas_delta_list *d;
int ret;
if (flags & BTREE_TRIGGER_OVERWRITE)
sectors = -sectors;
sectors *= replicas;
ret = bch2_replicas_deltas_realloc(trans, 0);
if (ret)
return ret;
d = trans->fs_usage_deltas;
replicas = clamp_t(unsigned, replicas, 1,
ARRAY_SIZE(d->persistent_reserved));
d->persistent_reserved[replicas - 1] += sectors;
return 0;
}
int bch2_trans_mark_reservation(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old,
struct bkey_i *new,
unsigned flags)
{
return trigger_run_overwrite_then_insert(__trans_mark_reservation, trans, btree_id, level, old, new, flags);
}
static int trans_mark_reflink_p_segment(struct btree_trans *trans,
struct bkey_s_c_reflink_p p,
u64 *idx, unsigned flags)
{
struct bch_fs *c = trans->c;
struct btree_iter iter;
struct bkey_i *k;
__le64 *refcount;
int add = !(flags & BTREE_TRIGGER_OVERWRITE) ? 1 : -1;
struct printbuf buf = PRINTBUF;
int ret;
k = bch2_bkey_get_mut_noupdate(trans, &iter,
BTREE_ID_reflink, POS(0, *idx),
BTREE_ITER_WITH_UPDATES);
ret = PTR_ERR_OR_ZERO(k);
if (ret)
goto err;
refcount = bkey_refcount(k);
if (!refcount) {
bch2_bkey_val_to_text(&buf, c, p.s_c);
bch2_trans_inconsistent(trans,
"nonexistent indirect extent at %llu while marking\n %s",
*idx, buf.buf);
ret = -EIO;
goto err;
}
if (!*refcount && (flags & BTREE_TRIGGER_OVERWRITE)) {
bch2_bkey_val_to_text(&buf, c, p.s_c);
bch2_trans_inconsistent(trans,
"indirect extent refcount underflow at %llu while marking\n %s",
*idx, buf.buf);
ret = -EIO;
goto err;
}
if (flags & BTREE_TRIGGER_INSERT) {
struct bch_reflink_p *v = (struct bch_reflink_p *) p.v;
u64 pad;
pad = max_t(s64, le32_to_cpu(v->front_pad),
le64_to_cpu(v->idx) - bkey_start_offset(&k->k));
BUG_ON(pad > U32_MAX);
v->front_pad = cpu_to_le32(pad);
pad = max_t(s64, le32_to_cpu(v->back_pad),
k->k.p.offset - p.k->size - le64_to_cpu(v->idx));
BUG_ON(pad > U32_MAX);
v->back_pad = cpu_to_le32(pad);
}
le64_add_cpu(refcount, add);
bch2_btree_iter_set_pos_to_extent_start(&iter);
ret = bch2_trans_update(trans, &iter, k, 0);
if (ret)
goto err;
*idx = k->k.p.offset;
err:
bch2_trans_iter_exit(trans, &iter);
printbuf_exit(&buf);
return ret;
}
static int __trans_mark_reflink_p(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c k, unsigned flags)
{
struct bkey_s_c_reflink_p p = bkey_s_c_to_reflink_p(k);
u64 idx, end_idx;
int ret = 0;
idx = le64_to_cpu(p.v->idx) - le32_to_cpu(p.v->front_pad);
end_idx = le64_to_cpu(p.v->idx) + p.k->size +
le32_to_cpu(p.v->back_pad);
while (idx < end_idx && !ret)
ret = trans_mark_reflink_p_segment(trans, p, &idx, flags);
return ret;
}
int bch2_trans_mark_reflink_p(struct btree_trans *trans,
enum btree_id btree_id, unsigned level,
struct bkey_s_c old,
struct bkey_i *new,
unsigned flags)
{
if (flags & BTREE_TRIGGER_INSERT) {
struct bch_reflink_p *v = &bkey_i_to_reflink_p(new)->v;
v->front_pad = v->back_pad = 0;
}
return trigger_run_overwrite_then_insert(__trans_mark_reflink_p, trans, btree_id, level, old, new, flags);
}
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));
if (ret)
bch_err_fn(c, ret);
return ret;
}
int bch2_trans_mark_dev_sbs(struct bch_fs *c)
{
struct bch_dev *ca;
unsigned i;
for_each_online_member(ca, c, i) {
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;
bch2_copygc_stop(c);
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);
}