mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
769b360049
Small performance optimization, and a bit of a code cleanup too. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
399 lines
10 KiB
C
399 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include "bcachefs.h"
|
|
#include "btree_update_interior.h"
|
|
#include "buckets.h"
|
|
#include "error.h"
|
|
#include "journal_io.h"
|
|
#include "replicas.h"
|
|
#include "sb-clean.h"
|
|
#include "super-io.h"
|
|
|
|
/*
|
|
* BCH_SB_FIELD_clean:
|
|
*
|
|
* Btree roots, and a few other things, are recovered from the journal after an
|
|
* unclean shutdown - but after a clean shutdown, to avoid having to read the
|
|
* journal, we can store them in the superblock.
|
|
*
|
|
* bch_sb_field_clean simply contains a list of journal entries, stored exactly
|
|
* as they would be in the journal:
|
|
*/
|
|
|
|
int bch2_sb_clean_validate_late(struct bch_fs *c, struct bch_sb_field_clean *clean,
|
|
int write)
|
|
{
|
|
struct jset_entry *entry;
|
|
int ret;
|
|
|
|
for (entry = clean->start;
|
|
entry < (struct jset_entry *) vstruct_end(&clean->field);
|
|
entry = vstruct_next(entry)) {
|
|
ret = bch2_journal_entry_validate(c, NULL, entry,
|
|
le16_to_cpu(c->disk_sb.sb->version),
|
|
BCH_SB_BIG_ENDIAN(c->disk_sb.sb),
|
|
write);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct bkey_i *btree_root_find(struct bch_fs *c,
|
|
struct bch_sb_field_clean *clean,
|
|
struct jset *j,
|
|
enum btree_id id, unsigned *level)
|
|
{
|
|
struct bkey_i *k;
|
|
struct jset_entry *entry, *start, *end;
|
|
|
|
if (clean) {
|
|
start = clean->start;
|
|
end = vstruct_end(&clean->field);
|
|
} else {
|
|
start = j->start;
|
|
end = vstruct_last(j);
|
|
}
|
|
|
|
for (entry = start; entry < end; entry = vstruct_next(entry))
|
|
if (entry->type == BCH_JSET_ENTRY_btree_root &&
|
|
entry->btree_id == id)
|
|
goto found;
|
|
|
|
return NULL;
|
|
found:
|
|
if (!entry->u64s)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
k = entry->start;
|
|
*level = entry->level;
|
|
return k;
|
|
}
|
|
|
|
int bch2_verify_superblock_clean(struct bch_fs *c,
|
|
struct bch_sb_field_clean **cleanp,
|
|
struct jset *j)
|
|
{
|
|
unsigned i;
|
|
struct bch_sb_field_clean *clean = *cleanp;
|
|
struct printbuf buf1 = PRINTBUF;
|
|
struct printbuf buf2 = PRINTBUF;
|
|
int ret = 0;
|
|
|
|
if (mustfix_fsck_err_on(j->seq != clean->journal_seq, c,
|
|
sb_clean_journal_seq_mismatch,
|
|
"superblock journal seq (%llu) doesn't match journal (%llu) after clean shutdown",
|
|
le64_to_cpu(clean->journal_seq),
|
|
le64_to_cpu(j->seq))) {
|
|
kfree(clean);
|
|
*cleanp = NULL;
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < BTREE_ID_NR; i++) {
|
|
struct bkey_i *k1, *k2;
|
|
unsigned l1 = 0, l2 = 0;
|
|
|
|
k1 = btree_root_find(c, clean, NULL, i, &l1);
|
|
k2 = btree_root_find(c, NULL, j, i, &l2);
|
|
|
|
if (!k1 && !k2)
|
|
continue;
|
|
|
|
printbuf_reset(&buf1);
|
|
printbuf_reset(&buf2);
|
|
|
|
if (k1)
|
|
bch2_bkey_val_to_text(&buf1, c, bkey_i_to_s_c(k1));
|
|
else
|
|
prt_printf(&buf1, "(none)");
|
|
|
|
if (k2)
|
|
bch2_bkey_val_to_text(&buf2, c, bkey_i_to_s_c(k2));
|
|
else
|
|
prt_printf(&buf2, "(none)");
|
|
|
|
mustfix_fsck_err_on(!k1 || !k2 ||
|
|
IS_ERR(k1) ||
|
|
IS_ERR(k2) ||
|
|
k1->k.u64s != k2->k.u64s ||
|
|
memcmp(k1, k2, bkey_bytes(&k1->k)) ||
|
|
l1 != l2, c,
|
|
sb_clean_btree_root_mismatch,
|
|
"superblock btree root %u doesn't match journal after clean shutdown\n"
|
|
"sb: l=%u %s\n"
|
|
"journal: l=%u %s\n", i,
|
|
l1, buf1.buf,
|
|
l2, buf2.buf);
|
|
}
|
|
fsck_err:
|
|
printbuf_exit(&buf2);
|
|
printbuf_exit(&buf1);
|
|
return ret;
|
|
}
|
|
|
|
struct bch_sb_field_clean *bch2_read_superblock_clean(struct bch_fs *c)
|
|
{
|
|
struct bch_sb_field_clean *clean, *sb_clean;
|
|
int ret;
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
sb_clean = bch2_sb_field_get(c->disk_sb.sb, clean);
|
|
|
|
if (fsck_err_on(!sb_clean, c,
|
|
sb_clean_missing,
|
|
"superblock marked clean but clean section not present")) {
|
|
SET_BCH_SB_CLEAN(c->disk_sb.sb, false);
|
|
c->sb.clean = false;
|
|
mutex_unlock(&c->sb_lock);
|
|
return NULL;
|
|
}
|
|
|
|
clean = kmemdup(sb_clean, vstruct_bytes(&sb_clean->field),
|
|
GFP_KERNEL);
|
|
if (!clean) {
|
|
mutex_unlock(&c->sb_lock);
|
|
return ERR_PTR(-BCH_ERR_ENOMEM_read_superblock_clean);
|
|
}
|
|
|
|
ret = bch2_sb_clean_validate_late(c, clean, READ);
|
|
if (ret) {
|
|
mutex_unlock(&c->sb_lock);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
return clean;
|
|
fsck_err:
|
|
mutex_unlock(&c->sb_lock);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static struct jset_entry *jset_entry_init(struct jset_entry **end, size_t size)
|
|
{
|
|
struct jset_entry *entry = *end;
|
|
unsigned u64s = DIV_ROUND_UP(size, sizeof(u64));
|
|
|
|
memset(entry, 0, u64s * sizeof(u64));
|
|
/*
|
|
* The u64s field counts from the start of data, ignoring the shared
|
|
* fields.
|
|
*/
|
|
entry->u64s = cpu_to_le16(u64s - 1);
|
|
|
|
*end = vstruct_next(*end);
|
|
return entry;
|
|
}
|
|
|
|
void bch2_journal_super_entries_add_common(struct bch_fs *c,
|
|
struct jset_entry **end,
|
|
u64 journal_seq)
|
|
{
|
|
struct bch_dev *ca;
|
|
unsigned i, dev;
|
|
|
|
percpu_down_read(&c->mark_lock);
|
|
|
|
if (!journal_seq) {
|
|
for (i = 0; i < ARRAY_SIZE(c->usage); i++)
|
|
bch2_fs_usage_acc_to_base(c, i);
|
|
} else {
|
|
bch2_fs_usage_acc_to_base(c, journal_seq & JOURNAL_BUF_MASK);
|
|
}
|
|
|
|
{
|
|
struct jset_entry_usage *u =
|
|
container_of(jset_entry_init(end, sizeof(*u)),
|
|
struct jset_entry_usage, entry);
|
|
|
|
u->entry.type = BCH_JSET_ENTRY_usage;
|
|
u->entry.btree_id = BCH_FS_USAGE_inodes;
|
|
u->v = cpu_to_le64(c->usage_base->nr_inodes);
|
|
}
|
|
|
|
{
|
|
struct jset_entry_usage *u =
|
|
container_of(jset_entry_init(end, sizeof(*u)),
|
|
struct jset_entry_usage, entry);
|
|
|
|
u->entry.type = BCH_JSET_ENTRY_usage;
|
|
u->entry.btree_id = BCH_FS_USAGE_key_version;
|
|
u->v = cpu_to_le64(atomic64_read(&c->key_version));
|
|
}
|
|
|
|
for (i = 0; i < BCH_REPLICAS_MAX; i++) {
|
|
struct jset_entry_usage *u =
|
|
container_of(jset_entry_init(end, sizeof(*u)),
|
|
struct jset_entry_usage, entry);
|
|
|
|
u->entry.type = BCH_JSET_ENTRY_usage;
|
|
u->entry.btree_id = BCH_FS_USAGE_reserved;
|
|
u->entry.level = i;
|
|
u->v = cpu_to_le64(c->usage_base->persistent_reserved[i]);
|
|
}
|
|
|
|
for (i = 0; i < c->replicas.nr; i++) {
|
|
struct bch_replicas_entry *e =
|
|
cpu_replicas_entry(&c->replicas, i);
|
|
struct jset_entry_data_usage *u =
|
|
container_of(jset_entry_init(end, sizeof(*u) + e->nr_devs),
|
|
struct jset_entry_data_usage, entry);
|
|
|
|
u->entry.type = BCH_JSET_ENTRY_data_usage;
|
|
u->v = cpu_to_le64(c->usage_base->replicas[i]);
|
|
unsafe_memcpy(&u->r, e, replicas_entry_bytes(e),
|
|
"embedded variable length struct");
|
|
}
|
|
|
|
for_each_member_device(ca, c, dev) {
|
|
unsigned b = sizeof(struct jset_entry_dev_usage) +
|
|
sizeof(struct jset_entry_dev_usage_type) * BCH_DATA_NR;
|
|
struct jset_entry_dev_usage *u =
|
|
container_of(jset_entry_init(end, b),
|
|
struct jset_entry_dev_usage, entry);
|
|
|
|
u->entry.type = BCH_JSET_ENTRY_dev_usage;
|
|
u->dev = cpu_to_le32(dev);
|
|
u->buckets_ec = cpu_to_le64(ca->usage_base->buckets_ec);
|
|
|
|
for (i = 0; i < BCH_DATA_NR; i++) {
|
|
u->d[i].buckets = cpu_to_le64(ca->usage_base->d[i].buckets);
|
|
u->d[i].sectors = cpu_to_le64(ca->usage_base->d[i].sectors);
|
|
u->d[i].fragmented = cpu_to_le64(ca->usage_base->d[i].fragmented);
|
|
}
|
|
}
|
|
|
|
percpu_up_read(&c->mark_lock);
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
struct jset_entry_clock *clock =
|
|
container_of(jset_entry_init(end, sizeof(*clock)),
|
|
struct jset_entry_clock, entry);
|
|
|
|
clock->entry.type = BCH_JSET_ENTRY_clock;
|
|
clock->rw = i;
|
|
clock->time = cpu_to_le64(atomic64_read(&c->io_clock[i].now));
|
|
}
|
|
}
|
|
|
|
static int bch2_sb_clean_validate(struct bch_sb *sb,
|
|
struct bch_sb_field *f,
|
|
struct printbuf *err)
|
|
{
|
|
struct bch_sb_field_clean *clean = field_to_type(f, clean);
|
|
|
|
if (vstruct_bytes(&clean->field) < sizeof(*clean)) {
|
|
prt_printf(err, "wrong size (got %zu should be %zu)",
|
|
vstruct_bytes(&clean->field), sizeof(*clean));
|
|
return -BCH_ERR_invalid_sb_clean;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bch2_sb_clean_to_text(struct printbuf *out, struct bch_sb *sb,
|
|
struct bch_sb_field *f)
|
|
{
|
|
struct bch_sb_field_clean *clean = field_to_type(f, clean);
|
|
struct jset_entry *entry;
|
|
|
|
prt_printf(out, "flags: %x", le32_to_cpu(clean->flags));
|
|
prt_newline(out);
|
|
prt_printf(out, "journal_seq: %llu", le64_to_cpu(clean->journal_seq));
|
|
prt_newline(out);
|
|
|
|
for (entry = clean->start;
|
|
entry != vstruct_end(&clean->field);
|
|
entry = vstruct_next(entry)) {
|
|
if (entry->type == BCH_JSET_ENTRY_btree_keys &&
|
|
!entry->u64s)
|
|
continue;
|
|
|
|
bch2_journal_entry_to_text(out, NULL, entry);
|
|
prt_newline(out);
|
|
}
|
|
}
|
|
|
|
const struct bch_sb_field_ops bch_sb_field_ops_clean = {
|
|
.validate = bch2_sb_clean_validate,
|
|
.to_text = bch2_sb_clean_to_text,
|
|
};
|
|
|
|
int bch2_fs_mark_dirty(struct bch_fs *c)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* Unconditionally write superblock, to verify it hasn't changed before
|
|
* we go rw:
|
|
*/
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
SET_BCH_SB_CLEAN(c->disk_sb.sb, false);
|
|
|
|
bch2_sb_maybe_downgrade(c);
|
|
c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALWAYS);
|
|
|
|
ret = bch2_write_super(c);
|
|
mutex_unlock(&c->sb_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void bch2_fs_mark_clean(struct bch_fs *c)
|
|
{
|
|
struct bch_sb_field_clean *sb_clean;
|
|
struct jset_entry *entry;
|
|
unsigned u64s;
|
|
int ret;
|
|
|
|
mutex_lock(&c->sb_lock);
|
|
if (BCH_SB_CLEAN(c->disk_sb.sb))
|
|
goto out;
|
|
|
|
SET_BCH_SB_CLEAN(c->disk_sb.sb, true);
|
|
|
|
c->disk_sb.sb->compat[0] |= cpu_to_le64(1ULL << BCH_COMPAT_alloc_info);
|
|
c->disk_sb.sb->compat[0] |= cpu_to_le64(1ULL << BCH_COMPAT_alloc_metadata);
|
|
c->disk_sb.sb->features[0] &= cpu_to_le64(~(1ULL << BCH_FEATURE_extents_above_btree_updates));
|
|
c->disk_sb.sb->features[0] &= cpu_to_le64(~(1ULL << BCH_FEATURE_btree_updates_journalled));
|
|
|
|
u64s = sizeof(*sb_clean) / sizeof(u64) + c->journal.entry_u64s_reserved;
|
|
|
|
sb_clean = bch2_sb_field_resize(&c->disk_sb, clean, u64s);
|
|
if (!sb_clean) {
|
|
bch_err(c, "error resizing superblock while setting filesystem clean");
|
|
goto out;
|
|
}
|
|
|
|
sb_clean->flags = 0;
|
|
sb_clean->journal_seq = cpu_to_le64(atomic64_read(&c->journal.seq));
|
|
|
|
/* Trying to catch outstanding bug: */
|
|
BUG_ON(le64_to_cpu(sb_clean->journal_seq) > S64_MAX);
|
|
|
|
entry = sb_clean->start;
|
|
bch2_journal_super_entries_add_common(c, &entry, 0);
|
|
entry = bch2_btree_roots_to_journal_entries(c, entry, 0);
|
|
BUG_ON((void *) entry > vstruct_end(&sb_clean->field));
|
|
|
|
memset(entry, 0,
|
|
vstruct_end(&sb_clean->field) - (void *) entry);
|
|
|
|
/*
|
|
* this should be in the write path, and we should be validating every
|
|
* superblock section:
|
|
*/
|
|
ret = bch2_sb_clean_validate_late(c, sb_clean, WRITE);
|
|
if (ret) {
|
|
bch_err(c, "error writing marking filesystem clean: validate error");
|
|
goto out;
|
|
}
|
|
|
|
bch2_write_super(c);
|
|
out:
|
|
mutex_unlock(&c->sb_lock);
|
|
}
|