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bcachefs: Include summarized counts in fs_usage

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2018-12-01 11:32:12 -05:00 committed by Kent Overstreet
parent 5663a41521
commit 06b7345cc2
5 changed files with 97 additions and 84 deletions
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46
fs/bcachefs/btree_gc.c
View File

@ -482,6 +482,24 @@ static void bch2_gc_free(struct bch_fs *c)
c->usage[1] = NULL;
}
static void fs_usage_reset(struct bch_fs_usage *fs_usage)
{
unsigned offset = offsetof(typeof(*fs_usage), s.gc_start);
memset((void *) fs_usage + offset, 0,
sizeof(*fs_usage) - offset);
}
static void fs_usage_cpy(struct bch_fs_usage *dst,
struct bch_fs_usage *src)
{
unsigned offset = offsetof(typeof(*dst), s.gc_start);
memcpy((void *) dst + offset,
(void *) src + offset,
sizeof(*dst) - offset);
}
static void bch2_gc_done_nocheck(struct bch_fs *c)
{
struct bch_dev *ca;
@ -530,17 +548,12 @@ static void bch2_gc_done_nocheck(struct bch_fs *c)
{
struct bch_fs_usage src = __bch2_fs_usage_read(c, 1);
struct bch_fs_usage *p;
for_each_possible_cpu(cpu) {
p = per_cpu_ptr(c->usage[0], cpu);
memset(p, 0, offsetof(typeof(*p), online_reserved));
}
for_each_possible_cpu(cpu)
fs_usage_reset(per_cpu_ptr(c->usage[0], cpu));
preempt_disable();
memcpy(this_cpu_ptr(c->usage[0]),
&src,
offsetof(typeof(*p), online_reserved));
fs_usage_cpy(this_cpu_ptr(c->usage[0]), &src);
preempt_enable();
}
@ -668,9 +681,14 @@ static void bch2_gc_done(struct bch_fs *c, bool initial)
{
struct bch_fs_usage dst = __bch2_fs_usage_read(c, 0);
struct bch_fs_usage src = __bch2_fs_usage_read(c, 1);
struct bch_fs_usage *p;
unsigned r, b;
copy_fs_field(s.hidden, "hidden");
copy_fs_field(s.data, "data");
copy_fs_field(s.cached, "cached");
copy_fs_field(s.reserved, "reserved");
copy_fs_field(s.nr_inodes, "nr_inodes");
for (r = 0; r < BCH_REPLICAS_MAX; r++) {
for (b = 0; b < BCH_DATA_NR; b++)
copy_fs_field(replicas[r].data[b],
@ -685,16 +703,12 @@ static void bch2_gc_done(struct bch_fs *c, bool initial)
for (b = 0; b < BCH_DATA_NR; b++)
copy_fs_field(buckets[b],
"buckets[%s]", bch2_data_types[b]);
copy_fs_field(nr_inodes, "nr_inodes");
for_each_possible_cpu(cpu) {
p = per_cpu_ptr(c->usage[0], cpu);
memset(p, 0, offsetof(typeof(*p), online_reserved));
}
for_each_possible_cpu(cpu)
fs_usage_reset(per_cpu_ptr(c->usage[0], cpu));
preempt_disable();
p = this_cpu_ptr(c->usage[0]);
memcpy(p, &dst, offsetof(typeof(*p), online_reserved));
fs_usage_cpy(this_cpu_ptr(c->usage[0]), &dst);
preempt_enable();
}
out:

112
fs/bcachefs/buckets.c
View File

@ -106,9 +106,9 @@ static void bch2_fs_stats_verify(struct bch_fs *c)
bch_data_types[j],
stats.buckets[j]);
if ((s64) stats.online_reserved < 0)
if ((s64) stats.s.online_reserved < 0)
panic("sectors_online_reserved underflow: %lli\n",
stats.online_reserved);
stats.s.online_reserved);
}
static void bch2_dev_stats_verify(struct bch_dev *ca)
@ -228,38 +228,6 @@ struct bch_fs_usage bch2_fs_usage_read(struct bch_fs *c)
return bch2_usage_read_raw(c->usage[0]);
}
struct fs_usage_sum {
u64 hidden;
u64 data;
u64 cached;
u64 reserved;
};
static inline struct fs_usage_sum __fs_usage_sum(struct bch_fs_usage stats)
{
struct fs_usage_sum sum = { 0 };
unsigned i;
/*
* For superblock and journal we count bucket usage, not sector usage,
* because any internal fragmentation should _not_ be counted as
* free space:
*/
sum.hidden += stats.buckets[BCH_DATA_SB];
sum.hidden += stats.buckets[BCH_DATA_JOURNAL];
for (i = 0; i < ARRAY_SIZE(stats.replicas); i++) {
sum.data += stats.replicas[i].data[BCH_DATA_BTREE];
sum.data += stats.replicas[i].data[BCH_DATA_USER];
sum.data += stats.replicas[i].ec_data;
sum.cached += stats.replicas[i].data[BCH_DATA_CACHED];
sum.reserved += stats.replicas[i].persistent_reserved;
}
sum.reserved += stats.online_reserved;
return sum;
}
#define RESERVE_FACTOR 6
static u64 reserve_factor(u64 r)
@ -274,9 +242,10 @@ static u64 avail_factor(u64 r)
static inline u64 __bch2_fs_sectors_used(struct bch_fs *c, struct bch_fs_usage fs_usage)
{
struct fs_usage_sum sum = __fs_usage_sum(fs_usage);
return sum.hidden + sum.data + reserve_factor(sum.reserved);
return fs_usage.s.hidden +
fs_usage.s.data +
reserve_factor(fs_usage.s.reserved +
fs_usage.s.online_reserved);
}
u64 bch2_fs_sectors_used(struct bch_fs *c, struct bch_fs_usage fs_usage)
@ -287,13 +256,14 @@ u64 bch2_fs_sectors_used(struct bch_fs *c, struct bch_fs_usage fs_usage)
struct bch_fs_usage_short
bch2_fs_usage_read_short(struct bch_fs *c)
{
struct bch_fs_usage usage = bch2_fs_usage_read(c);
struct fs_usage_sum sum = __fs_usage_sum(usage);
struct bch_fs_usage_summarized usage =
bch2_usage_read_raw(&c->usage[0]->s);
struct bch_fs_usage_short ret;
ret.capacity = READ_ONCE(c->capacity) - sum.hidden;
ret.used = min(ret.capacity, sum.data +
reserve_factor(sum.reserved));
ret.capacity = READ_ONCE(c->capacity) - usage.hidden;
ret.used = min(ret.capacity, usage.data +
reserve_factor(usage.reserved +
usage.online_reserved));
ret.nr_inodes = usage.nr_inodes;
return ret;
@ -334,8 +304,7 @@ void bch2_fs_usage_apply(struct bch_fs *c,
struct disk_reservation *disk_res,
struct gc_pos gc_pos)
{
struct fs_usage_sum sum = __fs_usage_sum(*fs_usage);
s64 added = sum.data + sum.reserved;
s64 added = fs_usage->s.data + fs_usage->s.reserved;
s64 should_not_have_added;
percpu_rwsem_assert_held(&c->mark_lock);
@ -353,7 +322,7 @@ void bch2_fs_usage_apply(struct bch_fs *c,
if (added > 0) {
disk_res->sectors -= added;
fs_usage->online_reserved -= added;
fs_usage->s.online_reserved -= added;
}
preempt_disable();
@ -368,6 +337,18 @@ void bch2_fs_usage_apply(struct bch_fs *c,
memset(fs_usage, 0, sizeof(*fs_usage));
}
static inline void account_bucket(struct bch_fs_usage *fs_usage,
struct bch_dev_usage *dev_usage,
enum bch_data_type type,
int nr, s64 size)
{
if (type == BCH_DATA_SB || type == BCH_DATA_JOURNAL)
fs_usage->s.hidden += size;
fs_usage->buckets[type] += size;
dev_usage->buckets[type] += nr;
}
static void bch2_dev_usage_update(struct bch_fs *c, struct bch_dev *ca,
struct bch_fs_usage *fs_usage,
struct bucket_mark old, struct bucket_mark new,
@ -386,15 +367,13 @@ static void bch2_dev_usage_update(struct bch_fs *c, struct bch_dev *ca,
preempt_disable();
dev_usage = this_cpu_ptr(ca->usage[gc]);
if (bucket_type(old)) {
fs_usage->buckets[bucket_type(old)] -= ca->mi.bucket_size;
dev_usage->buckets[bucket_type(old)]--;
}
if (bucket_type(old))
account_bucket(fs_usage, dev_usage, bucket_type(old),
-1, -ca->mi.bucket_size);
if (bucket_type(new)) {
fs_usage->buckets[bucket_type(new)] += ca->mi.bucket_size;
dev_usage->buckets[bucket_type(new)]++;
}
if (bucket_type(new))
account_bucket(fs_usage, dev_usage, bucket_type(new),
1, ca->mi.bucket_size);
dev_usage->buckets_alloc +=
(int) new.owned_by_allocator - (int) old.owned_by_allocator;
@ -460,7 +439,8 @@ static void __bch2_invalidate_bucket(struct bch_fs *c, struct bch_dev *ca,
new.gen++;
}));
fs_usage->replicas[0].data[BCH_DATA_CACHED] -= old->cached_sectors;
fs_usage->replicas[0].data[BCH_DATA_CACHED] -= old->cached_sectors;
fs_usage->s.cached -= old->cached_sectors;
}
void bch2_invalidate_bucket(struct bch_fs *c, struct bch_dev *ca,
@ -528,7 +508,10 @@ static void __bch2_mark_metadata_bucket(struct bch_fs *c, struct bch_dev *ca,
checked_add(new.dirty_sectors, sectors);
}));
fs_usage->replicas[0].data[type] += sectors;
if (type == BCH_DATA_BTREE ||
type == BCH_DATA_USER)
fs_usage->s.data += sectors;
fs_usage->replicas[0].data[type] += sectors;
}
void bch2_mark_metadata_bucket(struct bch_fs *c, struct bch_dev *ca,
@ -755,8 +738,13 @@ static int bch2_mark_extent(struct bch_fs *c, struct bkey_s_c k,
ec_redundancy = clamp_t(unsigned, ec_redundancy,
1, ARRAY_SIZE(fs_usage->replicas));
fs_usage->s.cached += cached_sectors;
fs_usage->replicas[0].data[BCH_DATA_CACHED] += cached_sectors;
fs_usage->s.data += dirty_sectors;
fs_usage->replicas[replicas - 1].data[data_type] += dirty_sectors;
fs_usage->s.data += ec_sectors;
fs_usage->replicas[ec_redundancy - 1].ec_data += ec_sectors;
return 0;
@ -866,9 +854,9 @@ static int __bch2_mark_key(struct bch_fs *c, struct bkey_s_c k,
break;
case KEY_TYPE_alloc:
if (inserting)
fs_usage->nr_inodes++;
fs_usage->s.nr_inodes++;
else
fs_usage->nr_inodes--;
fs_usage->s.nr_inodes--;
break;
case KEY_TYPE_reservation: {
unsigned replicas = bkey_s_c_to_reservation(k).v->nr_replicas;
@ -877,7 +865,8 @@ static int __bch2_mark_key(struct bch_fs *c, struct bkey_s_c k,
replicas = clamp_t(unsigned, replicas,
1, ARRAY_SIZE(fs_usage->replicas));
fs_usage->replicas[replicas - 1].persistent_reserved += sectors;
fs_usage->s.reserved += sectors;
fs_usage->replicas[replicas - 1].persistent_reserved += sectors;
break;
}
default:
@ -1021,8 +1010,7 @@ static u64 bch2_recalc_sectors_available(struct bch_fs *c)
void __bch2_disk_reservation_put(struct bch_fs *c, struct disk_reservation *res)
{
percpu_down_read(&c->mark_lock);
this_cpu_sub(c->usage[0]->online_reserved,
res->sectors);
this_cpu_sub(c->usage[0]->s.online_reserved, res->sectors);
bch2_fs_stats_verify(c);
percpu_up_read(&c->mark_lock);
@ -1064,7 +1052,7 @@ int bch2_disk_reservation_add(struct bch_fs *c, struct disk_reservation *res,
out:
pcpu->sectors_available -= sectors;
this_cpu_add(c->usage[0]->online_reserved, sectors);
this_cpu_add(c->usage[0]->s.online_reserved, sectors);
res->sectors += sectors;
bch2_disk_reservations_verify(c, flags);
@ -1098,7 +1086,7 @@ recalculate:
(flags & BCH_DISK_RESERVATION_NOFAIL)) {
atomic64_set(&c->sectors_available,
max_t(s64, 0, sectors_available - sectors));
this_cpu_add(c->usage[0]->online_reserved, sectors);
this_cpu_add(c->usage[0]->s.online_reserved, sectors);
res->sectors += sectors;
ret = 0;

19
fs/bcachefs/buckets_types.h
View File

@ -63,6 +63,21 @@ struct bch_dev_usage {
struct bch_fs_usage {
/* all fields are in units of 512 byte sectors: */
/* summarized: */
struct bch_fs_usage_summarized {
u64 online_reserved;
/* fields after online_reserved are cleared/recalculated by gc: */
u64 gc_start[0];
u64 hidden;
u64 data;
u64 cached;
u64 reserved;
u64 nr_inodes;
} s;
/* broken out: */
struct {
u64 data[BCH_DATA_NR];
u64 ec_data;
@ -70,10 +85,6 @@ struct bch_fs_usage {
} replicas[BCH_REPLICAS_MAX];
u64 buckets[BCH_DATA_NR];
u64 nr_inodes;
u64 online_reserved;
};
struct bch_fs_usage_short {

2
fs/bcachefs/chardev.c
View File

@ -398,7 +398,7 @@ static long bch2_ioctl_usage(struct bch_fs *c,
struct bch_ioctl_fs_usage dst = {
.capacity = c->capacity,
.used = bch2_fs_sectors_used(c, src),
.online_reserved = src.online_reserved,
.online_reserved = src.s.online_reserved,
};
for (i = 0; i < BCH_REPLICAS_MAX; i++) {

2
fs/bcachefs/sysfs.c
View File

@ -259,7 +259,7 @@ static ssize_t show_fs_alloc_debug(struct bch_fs *c, char *buf)
stats.buckets[type]);
pr_buf(&out, "online reserved:\t%llu\n",
stats.online_reserved);
stats.s.online_reserved);
return out.pos - buf;
}