mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1204 lines
30 KiB
1204 lines
30 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* bcache sysfs interfaces |
|
* |
|
* Copyright 2010, 2011 Kent Overstreet <[email protected]> |
|
* Copyright 2012 Google, Inc. |
|
*/ |
|
|
|
#include "bcache.h" |
|
#include "sysfs.h" |
|
#include "btree.h" |
|
#include "request.h" |
|
#include "writeback.h" |
|
#include "features.h" |
|
|
|
#include <linux/blkdev.h> |
|
#include <linux/sort.h> |
|
#include <linux/sched/clock.h> |
|
|
|
extern bool bcache_is_reboot; |
|
|
|
/* Default is 0 ("writethrough") */ |
|
static const char * const bch_cache_modes[] = { |
|
"writethrough", |
|
"writeback", |
|
"writearound", |
|
"none", |
|
NULL |
|
}; |
|
|
|
static const char * const bch_reada_cache_policies[] = { |
|
"all", |
|
"meta-only", |
|
NULL |
|
}; |
|
|
|
/* Default is 0 ("auto") */ |
|
static const char * const bch_stop_on_failure_modes[] = { |
|
"auto", |
|
"always", |
|
NULL |
|
}; |
|
|
|
static const char * const cache_replacement_policies[] = { |
|
"lru", |
|
"fifo", |
|
"random", |
|
NULL |
|
}; |
|
|
|
static const char * const error_actions[] = { |
|
"unregister", |
|
"panic", |
|
NULL |
|
}; |
|
|
|
write_attribute(attach); |
|
write_attribute(detach); |
|
write_attribute(unregister); |
|
write_attribute(stop); |
|
write_attribute(clear_stats); |
|
write_attribute(trigger_gc); |
|
write_attribute(prune_cache); |
|
write_attribute(flash_vol_create); |
|
|
|
read_attribute(bucket_size); |
|
read_attribute(block_size); |
|
read_attribute(nbuckets); |
|
read_attribute(tree_depth); |
|
read_attribute(root_usage_percent); |
|
read_attribute(priority_stats); |
|
read_attribute(btree_cache_size); |
|
read_attribute(btree_cache_max_chain); |
|
read_attribute(cache_available_percent); |
|
read_attribute(written); |
|
read_attribute(btree_written); |
|
read_attribute(metadata_written); |
|
read_attribute(active_journal_entries); |
|
read_attribute(backing_dev_name); |
|
read_attribute(backing_dev_uuid); |
|
|
|
sysfs_time_stats_attribute(btree_gc, sec, ms); |
|
sysfs_time_stats_attribute(btree_split, sec, us); |
|
sysfs_time_stats_attribute(btree_sort, ms, us); |
|
sysfs_time_stats_attribute(btree_read, ms, us); |
|
|
|
read_attribute(btree_nodes); |
|
read_attribute(btree_used_percent); |
|
read_attribute(average_key_size); |
|
read_attribute(dirty_data); |
|
read_attribute(bset_tree_stats); |
|
read_attribute(feature_compat); |
|
read_attribute(feature_ro_compat); |
|
read_attribute(feature_incompat); |
|
|
|
read_attribute(state); |
|
read_attribute(cache_read_races); |
|
read_attribute(reclaim); |
|
read_attribute(reclaimed_journal_buckets); |
|
read_attribute(flush_write); |
|
read_attribute(writeback_keys_done); |
|
read_attribute(writeback_keys_failed); |
|
read_attribute(io_errors); |
|
read_attribute(congested); |
|
read_attribute(cutoff_writeback); |
|
read_attribute(cutoff_writeback_sync); |
|
rw_attribute(congested_read_threshold_us); |
|
rw_attribute(congested_write_threshold_us); |
|
|
|
rw_attribute(sequential_cutoff); |
|
rw_attribute(data_csum); |
|
rw_attribute(cache_mode); |
|
rw_attribute(readahead_cache_policy); |
|
rw_attribute(stop_when_cache_set_failed); |
|
rw_attribute(writeback_metadata); |
|
rw_attribute(writeback_running); |
|
rw_attribute(writeback_percent); |
|
rw_attribute(writeback_delay); |
|
rw_attribute(writeback_rate); |
|
rw_attribute(writeback_consider_fragment); |
|
|
|
rw_attribute(writeback_rate_update_seconds); |
|
rw_attribute(writeback_rate_i_term_inverse); |
|
rw_attribute(writeback_rate_p_term_inverse); |
|
rw_attribute(writeback_rate_fp_term_low); |
|
rw_attribute(writeback_rate_fp_term_mid); |
|
rw_attribute(writeback_rate_fp_term_high); |
|
rw_attribute(writeback_rate_minimum); |
|
read_attribute(writeback_rate_debug); |
|
|
|
read_attribute(stripe_size); |
|
read_attribute(partial_stripes_expensive); |
|
|
|
rw_attribute(synchronous); |
|
rw_attribute(journal_delay_ms); |
|
rw_attribute(io_disable); |
|
rw_attribute(discard); |
|
rw_attribute(running); |
|
rw_attribute(label); |
|
rw_attribute(errors); |
|
rw_attribute(io_error_limit); |
|
rw_attribute(io_error_halflife); |
|
rw_attribute(verify); |
|
rw_attribute(bypass_torture_test); |
|
rw_attribute(key_merging_disabled); |
|
rw_attribute(gc_always_rewrite); |
|
rw_attribute(expensive_debug_checks); |
|
rw_attribute(cache_replacement_policy); |
|
rw_attribute(btree_shrinker_disabled); |
|
rw_attribute(copy_gc_enabled); |
|
rw_attribute(idle_max_writeback_rate); |
|
rw_attribute(gc_after_writeback); |
|
rw_attribute(size); |
|
|
|
static ssize_t bch_snprint_string_list(char *buf, |
|
size_t size, |
|
const char * const list[], |
|
size_t selected) |
|
{ |
|
char *out = buf; |
|
size_t i; |
|
|
|
for (i = 0; list[i]; i++) |
|
out += scnprintf(out, buf + size - out, |
|
i == selected ? "[%s] " : "%s ", list[i]); |
|
|
|
out[-1] = '\n'; |
|
return out - buf; |
|
} |
|
|
|
SHOW(__bch_cached_dev) |
|
{ |
|
struct cached_dev *dc = container_of(kobj, struct cached_dev, |
|
disk.kobj); |
|
char const *states[] = { "no cache", "clean", "dirty", "inconsistent" }; |
|
int wb = dc->writeback_running; |
|
|
|
#define var(stat) (dc->stat) |
|
|
|
if (attr == &sysfs_cache_mode) |
|
return bch_snprint_string_list(buf, PAGE_SIZE, |
|
bch_cache_modes, |
|
BDEV_CACHE_MODE(&dc->sb)); |
|
|
|
if (attr == &sysfs_readahead_cache_policy) |
|
return bch_snprint_string_list(buf, PAGE_SIZE, |
|
bch_reada_cache_policies, |
|
dc->cache_readahead_policy); |
|
|
|
if (attr == &sysfs_stop_when_cache_set_failed) |
|
return bch_snprint_string_list(buf, PAGE_SIZE, |
|
bch_stop_on_failure_modes, |
|
dc->stop_when_cache_set_failed); |
|
|
|
|
|
sysfs_printf(data_csum, "%i", dc->disk.data_csum); |
|
var_printf(verify, "%i"); |
|
var_printf(bypass_torture_test, "%i"); |
|
var_printf(writeback_metadata, "%i"); |
|
var_printf(writeback_running, "%i"); |
|
var_printf(writeback_consider_fragment, "%i"); |
|
var_print(writeback_delay); |
|
var_print(writeback_percent); |
|
sysfs_hprint(writeback_rate, |
|
wb ? atomic_long_read(&dc->writeback_rate.rate) << 9 : 0); |
|
sysfs_printf(io_errors, "%i", atomic_read(&dc->io_errors)); |
|
sysfs_printf(io_error_limit, "%i", dc->error_limit); |
|
sysfs_printf(io_disable, "%i", dc->io_disable); |
|
var_print(writeback_rate_update_seconds); |
|
var_print(writeback_rate_i_term_inverse); |
|
var_print(writeback_rate_p_term_inverse); |
|
var_print(writeback_rate_fp_term_low); |
|
var_print(writeback_rate_fp_term_mid); |
|
var_print(writeback_rate_fp_term_high); |
|
var_print(writeback_rate_minimum); |
|
|
|
if (attr == &sysfs_writeback_rate_debug) { |
|
char rate[20]; |
|
char dirty[20]; |
|
char target[20]; |
|
char proportional[20]; |
|
char integral[20]; |
|
char change[20]; |
|
s64 next_io; |
|
|
|
/* |
|
* Except for dirty and target, other values should |
|
* be 0 if writeback is not running. |
|
*/ |
|
bch_hprint(rate, |
|
wb ? atomic_long_read(&dc->writeback_rate.rate) << 9 |
|
: 0); |
|
bch_hprint(dirty, bcache_dev_sectors_dirty(&dc->disk) << 9); |
|
bch_hprint(target, dc->writeback_rate_target << 9); |
|
bch_hprint(proportional, |
|
wb ? dc->writeback_rate_proportional << 9 : 0); |
|
bch_hprint(integral, |
|
wb ? dc->writeback_rate_integral_scaled << 9 : 0); |
|
bch_hprint(change, wb ? dc->writeback_rate_change << 9 : 0); |
|
next_io = wb ? div64_s64(dc->writeback_rate.next-local_clock(), |
|
NSEC_PER_MSEC) : 0; |
|
|
|
return sprintf(buf, |
|
"rate:\t\t%s/sec\n" |
|
"dirty:\t\t%s\n" |
|
"target:\t\t%s\n" |
|
"proportional:\t%s\n" |
|
"integral:\t%s\n" |
|
"change:\t\t%s/sec\n" |
|
"next io:\t%llims\n", |
|
rate, dirty, target, proportional, |
|
integral, change, next_io); |
|
} |
|
|
|
sysfs_hprint(dirty_data, |
|
bcache_dev_sectors_dirty(&dc->disk) << 9); |
|
|
|
sysfs_hprint(stripe_size, ((uint64_t)dc->disk.stripe_size) << 9); |
|
var_printf(partial_stripes_expensive, "%u"); |
|
|
|
var_hprint(sequential_cutoff); |
|
|
|
sysfs_print(running, atomic_read(&dc->running)); |
|
sysfs_print(state, states[BDEV_STATE(&dc->sb)]); |
|
|
|
if (attr == &sysfs_label) { |
|
memcpy(buf, dc->sb.label, SB_LABEL_SIZE); |
|
buf[SB_LABEL_SIZE + 1] = '\0'; |
|
strcat(buf, "\n"); |
|
return strlen(buf); |
|
} |
|
|
|
if (attr == &sysfs_backing_dev_name) { |
|
snprintf(buf, BDEVNAME_SIZE + 1, "%pg", dc->bdev); |
|
strcat(buf, "\n"); |
|
return strlen(buf); |
|
} |
|
|
|
if (attr == &sysfs_backing_dev_uuid) { |
|
/* convert binary uuid into 36-byte string plus '\0' */ |
|
snprintf(buf, 36+1, "%pU", dc->sb.uuid); |
|
strcat(buf, "\n"); |
|
return strlen(buf); |
|
} |
|
|
|
#undef var |
|
return 0; |
|
} |
|
SHOW_LOCKED(bch_cached_dev) |
|
|
|
STORE(__cached_dev) |
|
{ |
|
struct cached_dev *dc = container_of(kobj, struct cached_dev, |
|
disk.kobj); |
|
ssize_t v; |
|
struct cache_set *c; |
|
struct kobj_uevent_env *env; |
|
|
|
/* no user space access if system is rebooting */ |
|
if (bcache_is_reboot) |
|
return -EBUSY; |
|
|
|
#define d_strtoul(var) sysfs_strtoul(var, dc->var) |
|
#define d_strtoul_nonzero(var) sysfs_strtoul_clamp(var, dc->var, 1, INT_MAX) |
|
#define d_strtoi_h(var) sysfs_hatoi(var, dc->var) |
|
|
|
sysfs_strtoul(data_csum, dc->disk.data_csum); |
|
d_strtoul(verify); |
|
sysfs_strtoul_bool(bypass_torture_test, dc->bypass_torture_test); |
|
sysfs_strtoul_bool(writeback_metadata, dc->writeback_metadata); |
|
sysfs_strtoul_bool(writeback_running, dc->writeback_running); |
|
sysfs_strtoul_bool(writeback_consider_fragment, dc->writeback_consider_fragment); |
|
sysfs_strtoul_clamp(writeback_delay, dc->writeback_delay, 0, UINT_MAX); |
|
|
|
sysfs_strtoul_clamp(writeback_percent, dc->writeback_percent, |
|
0, bch_cutoff_writeback); |
|
|
|
if (attr == &sysfs_writeback_rate) { |
|
ssize_t ret; |
|
long int v = atomic_long_read(&dc->writeback_rate.rate); |
|
|
|
ret = strtoul_safe_clamp(buf, v, 1, INT_MAX); |
|
|
|
if (!ret) { |
|
atomic_long_set(&dc->writeback_rate.rate, v); |
|
ret = size; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
sysfs_strtoul_clamp(writeback_rate_update_seconds, |
|
dc->writeback_rate_update_seconds, |
|
1, WRITEBACK_RATE_UPDATE_SECS_MAX); |
|
sysfs_strtoul_clamp(writeback_rate_i_term_inverse, |
|
dc->writeback_rate_i_term_inverse, |
|
1, UINT_MAX); |
|
sysfs_strtoul_clamp(writeback_rate_p_term_inverse, |
|
dc->writeback_rate_p_term_inverse, |
|
1, UINT_MAX); |
|
sysfs_strtoul_clamp(writeback_rate_fp_term_low, |
|
dc->writeback_rate_fp_term_low, |
|
1, dc->writeback_rate_fp_term_mid - 1); |
|
sysfs_strtoul_clamp(writeback_rate_fp_term_mid, |
|
dc->writeback_rate_fp_term_mid, |
|
dc->writeback_rate_fp_term_low + 1, |
|
dc->writeback_rate_fp_term_high - 1); |
|
sysfs_strtoul_clamp(writeback_rate_fp_term_high, |
|
dc->writeback_rate_fp_term_high, |
|
dc->writeback_rate_fp_term_mid + 1, UINT_MAX); |
|
sysfs_strtoul_clamp(writeback_rate_minimum, |
|
dc->writeback_rate_minimum, |
|
1, UINT_MAX); |
|
|
|
sysfs_strtoul_clamp(io_error_limit, dc->error_limit, 0, INT_MAX); |
|
|
|
if (attr == &sysfs_io_disable) { |
|
int v = strtoul_or_return(buf); |
|
|
|
dc->io_disable = v ? 1 : 0; |
|
} |
|
|
|
sysfs_strtoul_clamp(sequential_cutoff, |
|
dc->sequential_cutoff, |
|
0, UINT_MAX); |
|
|
|
if (attr == &sysfs_clear_stats) |
|
bch_cache_accounting_clear(&dc->accounting); |
|
|
|
if (attr == &sysfs_running && |
|
strtoul_or_return(buf)) { |
|
v = bch_cached_dev_run(dc); |
|
if (v) |
|
return v; |
|
} |
|
|
|
if (attr == &sysfs_cache_mode) { |
|
v = __sysfs_match_string(bch_cache_modes, -1, buf); |
|
if (v < 0) |
|
return v; |
|
|
|
if ((unsigned int) v != BDEV_CACHE_MODE(&dc->sb)) { |
|
SET_BDEV_CACHE_MODE(&dc->sb, v); |
|
bch_write_bdev_super(dc, NULL); |
|
} |
|
} |
|
|
|
if (attr == &sysfs_readahead_cache_policy) { |
|
v = __sysfs_match_string(bch_reada_cache_policies, -1, buf); |
|
if (v < 0) |
|
return v; |
|
|
|
if ((unsigned int) v != dc->cache_readahead_policy) |
|
dc->cache_readahead_policy = v; |
|
} |
|
|
|
if (attr == &sysfs_stop_when_cache_set_failed) { |
|
v = __sysfs_match_string(bch_stop_on_failure_modes, -1, buf); |
|
if (v < 0) |
|
return v; |
|
|
|
dc->stop_when_cache_set_failed = v; |
|
} |
|
|
|
if (attr == &sysfs_label) { |
|
if (size > SB_LABEL_SIZE) |
|
return -EINVAL; |
|
memcpy(dc->sb.label, buf, size); |
|
if (size < SB_LABEL_SIZE) |
|
dc->sb.label[size] = '\0'; |
|
if (size && dc->sb.label[size - 1] == '\n') |
|
dc->sb.label[size - 1] = '\0'; |
|
bch_write_bdev_super(dc, NULL); |
|
if (dc->disk.c) { |
|
memcpy(dc->disk.c->uuids[dc->disk.id].label, |
|
buf, SB_LABEL_SIZE); |
|
bch_uuid_write(dc->disk.c); |
|
} |
|
env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL); |
|
if (!env) |
|
return -ENOMEM; |
|
add_uevent_var(env, "DRIVER=bcache"); |
|
add_uevent_var(env, "CACHED_UUID=%pU", dc->sb.uuid); |
|
add_uevent_var(env, "CACHED_LABEL=%s", buf); |
|
kobject_uevent_env(&disk_to_dev(dc->disk.disk)->kobj, |
|
KOBJ_CHANGE, |
|
env->envp); |
|
kfree(env); |
|
} |
|
|
|
if (attr == &sysfs_attach) { |
|
uint8_t set_uuid[16]; |
|
|
|
if (bch_parse_uuid(buf, set_uuid) < 16) |
|
return -EINVAL; |
|
|
|
v = -ENOENT; |
|
list_for_each_entry(c, &bch_cache_sets, list) { |
|
v = bch_cached_dev_attach(dc, c, set_uuid); |
|
if (!v) |
|
return size; |
|
} |
|
if (v == -ENOENT) |
|
pr_err("Can't attach %s: cache set not found\n", buf); |
|
return v; |
|
} |
|
|
|
if (attr == &sysfs_detach && dc->disk.c) |
|
bch_cached_dev_detach(dc); |
|
|
|
if (attr == &sysfs_stop) |
|
bcache_device_stop(&dc->disk); |
|
|
|
return size; |
|
} |
|
|
|
STORE(bch_cached_dev) |
|
{ |
|
struct cached_dev *dc = container_of(kobj, struct cached_dev, |
|
disk.kobj); |
|
|
|
/* no user space access if system is rebooting */ |
|
if (bcache_is_reboot) |
|
return -EBUSY; |
|
|
|
mutex_lock(&bch_register_lock); |
|
size = __cached_dev_store(kobj, attr, buf, size); |
|
|
|
if (attr == &sysfs_writeback_running) { |
|
/* dc->writeback_running changed in __cached_dev_store() */ |
|
if (IS_ERR_OR_NULL(dc->writeback_thread)) { |
|
/* |
|
* reject setting it to 1 via sysfs if writeback |
|
* kthread is not created yet. |
|
*/ |
|
if (dc->writeback_running) { |
|
dc->writeback_running = false; |
|
pr_err("%s: failed to run non-existent writeback thread\n", |
|
dc->disk.disk->disk_name); |
|
} |
|
} else |
|
/* |
|
* writeback kthread will check if dc->writeback_running |
|
* is true or false. |
|
*/ |
|
bch_writeback_queue(dc); |
|
} |
|
|
|
/* |
|
* Only set BCACHE_DEV_WB_RUNNING when cached device attached to |
|
* a cache set, otherwise it doesn't make sense. |
|
*/ |
|
if (attr == &sysfs_writeback_percent) |
|
if ((dc->disk.c != NULL) && |
|
(!test_and_set_bit(BCACHE_DEV_WB_RUNNING, &dc->disk.flags))) |
|
schedule_delayed_work(&dc->writeback_rate_update, |
|
dc->writeback_rate_update_seconds * HZ); |
|
|
|
mutex_unlock(&bch_register_lock); |
|
return size; |
|
} |
|
|
|
static struct attribute *bch_cached_dev_attrs[] = { |
|
&sysfs_attach, |
|
&sysfs_detach, |
|
&sysfs_stop, |
|
#if 0 |
|
&sysfs_data_csum, |
|
#endif |
|
&sysfs_cache_mode, |
|
&sysfs_readahead_cache_policy, |
|
&sysfs_stop_when_cache_set_failed, |
|
&sysfs_writeback_metadata, |
|
&sysfs_writeback_running, |
|
&sysfs_writeback_delay, |
|
&sysfs_writeback_percent, |
|
&sysfs_writeback_rate, |
|
&sysfs_writeback_consider_fragment, |
|
&sysfs_writeback_rate_update_seconds, |
|
&sysfs_writeback_rate_i_term_inverse, |
|
&sysfs_writeback_rate_p_term_inverse, |
|
&sysfs_writeback_rate_fp_term_low, |
|
&sysfs_writeback_rate_fp_term_mid, |
|
&sysfs_writeback_rate_fp_term_high, |
|
&sysfs_writeback_rate_minimum, |
|
&sysfs_writeback_rate_debug, |
|
&sysfs_io_errors, |
|
&sysfs_io_error_limit, |
|
&sysfs_io_disable, |
|
&sysfs_dirty_data, |
|
&sysfs_stripe_size, |
|
&sysfs_partial_stripes_expensive, |
|
&sysfs_sequential_cutoff, |
|
&sysfs_clear_stats, |
|
&sysfs_running, |
|
&sysfs_state, |
|
&sysfs_label, |
|
#ifdef CONFIG_BCACHE_DEBUG |
|
&sysfs_verify, |
|
&sysfs_bypass_torture_test, |
|
#endif |
|
&sysfs_backing_dev_name, |
|
&sysfs_backing_dev_uuid, |
|
NULL |
|
}; |
|
ATTRIBUTE_GROUPS(bch_cached_dev); |
|
KTYPE(bch_cached_dev); |
|
|
|
SHOW(bch_flash_dev) |
|
{ |
|
struct bcache_device *d = container_of(kobj, struct bcache_device, |
|
kobj); |
|
struct uuid_entry *u = &d->c->uuids[d->id]; |
|
|
|
sysfs_printf(data_csum, "%i", d->data_csum); |
|
sysfs_hprint(size, u->sectors << 9); |
|
|
|
if (attr == &sysfs_label) { |
|
memcpy(buf, u->label, SB_LABEL_SIZE); |
|
buf[SB_LABEL_SIZE + 1] = '\0'; |
|
strcat(buf, "\n"); |
|
return strlen(buf); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
STORE(__bch_flash_dev) |
|
{ |
|
struct bcache_device *d = container_of(kobj, struct bcache_device, |
|
kobj); |
|
struct uuid_entry *u = &d->c->uuids[d->id]; |
|
|
|
/* no user space access if system is rebooting */ |
|
if (bcache_is_reboot) |
|
return -EBUSY; |
|
|
|
sysfs_strtoul(data_csum, d->data_csum); |
|
|
|
if (attr == &sysfs_size) { |
|
uint64_t v; |
|
|
|
strtoi_h_or_return(buf, v); |
|
|
|
u->sectors = v >> 9; |
|
bch_uuid_write(d->c); |
|
set_capacity(d->disk, u->sectors); |
|
} |
|
|
|
if (attr == &sysfs_label) { |
|
memcpy(u->label, buf, SB_LABEL_SIZE); |
|
bch_uuid_write(d->c); |
|
} |
|
|
|
if (attr == &sysfs_unregister) { |
|
set_bit(BCACHE_DEV_DETACHING, &d->flags); |
|
bcache_device_stop(d); |
|
} |
|
|
|
return size; |
|
} |
|
STORE_LOCKED(bch_flash_dev) |
|
|
|
static struct attribute *bch_flash_dev_attrs[] = { |
|
&sysfs_unregister, |
|
#if 0 |
|
&sysfs_data_csum, |
|
#endif |
|
&sysfs_label, |
|
&sysfs_size, |
|
NULL |
|
}; |
|
ATTRIBUTE_GROUPS(bch_flash_dev); |
|
KTYPE(bch_flash_dev); |
|
|
|
struct bset_stats_op { |
|
struct btree_op op; |
|
size_t nodes; |
|
struct bset_stats stats; |
|
}; |
|
|
|
static int bch_btree_bset_stats(struct btree_op *b_op, struct btree *b) |
|
{ |
|
struct bset_stats_op *op = container_of(b_op, struct bset_stats_op, op); |
|
|
|
op->nodes++; |
|
bch_btree_keys_stats(&b->keys, &op->stats); |
|
|
|
return MAP_CONTINUE; |
|
} |
|
|
|
static int bch_bset_print_stats(struct cache_set *c, char *buf) |
|
{ |
|
struct bset_stats_op op; |
|
int ret; |
|
|
|
memset(&op, 0, sizeof(op)); |
|
bch_btree_op_init(&op.op, -1); |
|
|
|
ret = bch_btree_map_nodes(&op.op, c, &ZERO_KEY, bch_btree_bset_stats); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return snprintf(buf, PAGE_SIZE, |
|
"btree nodes: %zu\n" |
|
"written sets: %zu\n" |
|
"unwritten sets: %zu\n" |
|
"written key bytes: %zu\n" |
|
"unwritten key bytes: %zu\n" |
|
"floats: %zu\n" |
|
"failed: %zu\n", |
|
op.nodes, |
|
op.stats.sets_written, op.stats.sets_unwritten, |
|
op.stats.bytes_written, op.stats.bytes_unwritten, |
|
op.stats.floats, op.stats.failed); |
|
} |
|
|
|
static unsigned int bch_root_usage(struct cache_set *c) |
|
{ |
|
unsigned int bytes = 0; |
|
struct bkey *k; |
|
struct btree *b; |
|
struct btree_iter iter; |
|
|
|
goto lock_root; |
|
|
|
do { |
|
rw_unlock(false, b); |
|
lock_root: |
|
b = c->root; |
|
rw_lock(false, b, b->level); |
|
} while (b != c->root); |
|
|
|
for_each_key_filter(&b->keys, k, &iter, bch_ptr_bad) |
|
bytes += bkey_bytes(k); |
|
|
|
rw_unlock(false, b); |
|
|
|
return (bytes * 100) / btree_bytes(c); |
|
} |
|
|
|
static size_t bch_cache_size(struct cache_set *c) |
|
{ |
|
size_t ret = 0; |
|
struct btree *b; |
|
|
|
mutex_lock(&c->bucket_lock); |
|
list_for_each_entry(b, &c->btree_cache, list) |
|
ret += 1 << (b->keys.page_order + PAGE_SHIFT); |
|
|
|
mutex_unlock(&c->bucket_lock); |
|
return ret; |
|
} |
|
|
|
static unsigned int bch_cache_max_chain(struct cache_set *c) |
|
{ |
|
unsigned int ret = 0; |
|
struct hlist_head *h; |
|
|
|
mutex_lock(&c->bucket_lock); |
|
|
|
for (h = c->bucket_hash; |
|
h < c->bucket_hash + (1 << BUCKET_HASH_BITS); |
|
h++) { |
|
unsigned int i = 0; |
|
struct hlist_node *p; |
|
|
|
hlist_for_each(p, h) |
|
i++; |
|
|
|
ret = max(ret, i); |
|
} |
|
|
|
mutex_unlock(&c->bucket_lock); |
|
return ret; |
|
} |
|
|
|
static unsigned int bch_btree_used(struct cache_set *c) |
|
{ |
|
return div64_u64(c->gc_stats.key_bytes * 100, |
|
(c->gc_stats.nodes ?: 1) * btree_bytes(c)); |
|
} |
|
|
|
static unsigned int bch_average_key_size(struct cache_set *c) |
|
{ |
|
return c->gc_stats.nkeys |
|
? div64_u64(c->gc_stats.data, c->gc_stats.nkeys) |
|
: 0; |
|
} |
|
|
|
SHOW(__bch_cache_set) |
|
{ |
|
struct cache_set *c = container_of(kobj, struct cache_set, kobj); |
|
|
|
sysfs_print(synchronous, CACHE_SYNC(&c->cache->sb)); |
|
sysfs_print(journal_delay_ms, c->journal_delay_ms); |
|
sysfs_hprint(bucket_size, bucket_bytes(c->cache)); |
|
sysfs_hprint(block_size, block_bytes(c->cache)); |
|
sysfs_print(tree_depth, c->root->level); |
|
sysfs_print(root_usage_percent, bch_root_usage(c)); |
|
|
|
sysfs_hprint(btree_cache_size, bch_cache_size(c)); |
|
sysfs_print(btree_cache_max_chain, bch_cache_max_chain(c)); |
|
sysfs_print(cache_available_percent, 100 - c->gc_stats.in_use); |
|
|
|
sysfs_print_time_stats(&c->btree_gc_time, btree_gc, sec, ms); |
|
sysfs_print_time_stats(&c->btree_split_time, btree_split, sec, us); |
|
sysfs_print_time_stats(&c->sort.time, btree_sort, ms, us); |
|
sysfs_print_time_stats(&c->btree_read_time, btree_read, ms, us); |
|
|
|
sysfs_print(btree_used_percent, bch_btree_used(c)); |
|
sysfs_print(btree_nodes, c->gc_stats.nodes); |
|
sysfs_hprint(average_key_size, bch_average_key_size(c)); |
|
|
|
sysfs_print(cache_read_races, |
|
atomic_long_read(&c->cache_read_races)); |
|
|
|
sysfs_print(reclaim, |
|
atomic_long_read(&c->reclaim)); |
|
|
|
sysfs_print(reclaimed_journal_buckets, |
|
atomic_long_read(&c->reclaimed_journal_buckets)); |
|
|
|
sysfs_print(flush_write, |
|
atomic_long_read(&c->flush_write)); |
|
|
|
sysfs_print(writeback_keys_done, |
|
atomic_long_read(&c->writeback_keys_done)); |
|
sysfs_print(writeback_keys_failed, |
|
atomic_long_read(&c->writeback_keys_failed)); |
|
|
|
if (attr == &sysfs_errors) |
|
return bch_snprint_string_list(buf, PAGE_SIZE, error_actions, |
|
c->on_error); |
|
|
|
/* See count_io_errors for why 88 */ |
|
sysfs_print(io_error_halflife, c->error_decay * 88); |
|
sysfs_print(io_error_limit, c->error_limit); |
|
|
|
sysfs_hprint(congested, |
|
((uint64_t) bch_get_congested(c)) << 9); |
|
sysfs_print(congested_read_threshold_us, |
|
c->congested_read_threshold_us); |
|
sysfs_print(congested_write_threshold_us, |
|
c->congested_write_threshold_us); |
|
|
|
sysfs_print(cutoff_writeback, bch_cutoff_writeback); |
|
sysfs_print(cutoff_writeback_sync, bch_cutoff_writeback_sync); |
|
|
|
sysfs_print(active_journal_entries, fifo_used(&c->journal.pin)); |
|
sysfs_printf(verify, "%i", c->verify); |
|
sysfs_printf(key_merging_disabled, "%i", c->key_merging_disabled); |
|
sysfs_printf(expensive_debug_checks, |
|
"%i", c->expensive_debug_checks); |
|
sysfs_printf(gc_always_rewrite, "%i", c->gc_always_rewrite); |
|
sysfs_printf(btree_shrinker_disabled, "%i", c->shrinker_disabled); |
|
sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled); |
|
sysfs_printf(idle_max_writeback_rate, "%i", |
|
c->idle_max_writeback_rate_enabled); |
|
sysfs_printf(gc_after_writeback, "%i", c->gc_after_writeback); |
|
sysfs_printf(io_disable, "%i", |
|
test_bit(CACHE_SET_IO_DISABLE, &c->flags)); |
|
|
|
if (attr == &sysfs_bset_tree_stats) |
|
return bch_bset_print_stats(c, buf); |
|
|
|
if (attr == &sysfs_feature_compat) |
|
return bch_print_cache_set_feature_compat(c, buf, PAGE_SIZE); |
|
if (attr == &sysfs_feature_ro_compat) |
|
return bch_print_cache_set_feature_ro_compat(c, buf, PAGE_SIZE); |
|
if (attr == &sysfs_feature_incompat) |
|
return bch_print_cache_set_feature_incompat(c, buf, PAGE_SIZE); |
|
|
|
return 0; |
|
} |
|
SHOW_LOCKED(bch_cache_set) |
|
|
|
STORE(__bch_cache_set) |
|
{ |
|
struct cache_set *c = container_of(kobj, struct cache_set, kobj); |
|
ssize_t v; |
|
|
|
/* no user space access if system is rebooting */ |
|
if (bcache_is_reboot) |
|
return -EBUSY; |
|
|
|
if (attr == &sysfs_unregister) |
|
bch_cache_set_unregister(c); |
|
|
|
if (attr == &sysfs_stop) |
|
bch_cache_set_stop(c); |
|
|
|
if (attr == &sysfs_synchronous) { |
|
bool sync = strtoul_or_return(buf); |
|
|
|
if (sync != CACHE_SYNC(&c->cache->sb)) { |
|
SET_CACHE_SYNC(&c->cache->sb, sync); |
|
bcache_write_super(c); |
|
} |
|
} |
|
|
|
if (attr == &sysfs_flash_vol_create) { |
|
int r; |
|
uint64_t v; |
|
|
|
strtoi_h_or_return(buf, v); |
|
|
|
r = bch_flash_dev_create(c, v); |
|
if (r) |
|
return r; |
|
} |
|
|
|
if (attr == &sysfs_clear_stats) { |
|
atomic_long_set(&c->writeback_keys_done, 0); |
|
atomic_long_set(&c->writeback_keys_failed, 0); |
|
|
|
memset(&c->gc_stats, 0, sizeof(struct gc_stat)); |
|
bch_cache_accounting_clear(&c->accounting); |
|
} |
|
|
|
if (attr == &sysfs_trigger_gc) |
|
force_wake_up_gc(c); |
|
|
|
if (attr == &sysfs_prune_cache) { |
|
struct shrink_control sc; |
|
|
|
sc.gfp_mask = GFP_KERNEL; |
|
sc.nr_to_scan = strtoul_or_return(buf); |
|
c->shrink.scan_objects(&c->shrink, &sc); |
|
} |
|
|
|
sysfs_strtoul_clamp(congested_read_threshold_us, |
|
c->congested_read_threshold_us, |
|
0, UINT_MAX); |
|
sysfs_strtoul_clamp(congested_write_threshold_us, |
|
c->congested_write_threshold_us, |
|
0, UINT_MAX); |
|
|
|
if (attr == &sysfs_errors) { |
|
v = __sysfs_match_string(error_actions, -1, buf); |
|
if (v < 0) |
|
return v; |
|
|
|
c->on_error = v; |
|
} |
|
|
|
sysfs_strtoul_clamp(io_error_limit, c->error_limit, 0, UINT_MAX); |
|
|
|
/* See count_io_errors() for why 88 */ |
|
if (attr == &sysfs_io_error_halflife) { |
|
unsigned long v = 0; |
|
ssize_t ret; |
|
|
|
ret = strtoul_safe_clamp(buf, v, 0, UINT_MAX); |
|
if (!ret) { |
|
c->error_decay = v / 88; |
|
return size; |
|
} |
|
return ret; |
|
} |
|
|
|
if (attr == &sysfs_io_disable) { |
|
v = strtoul_or_return(buf); |
|
if (v) { |
|
if (test_and_set_bit(CACHE_SET_IO_DISABLE, |
|
&c->flags)) |
|
pr_warn("CACHE_SET_IO_DISABLE already set\n"); |
|
} else { |
|
if (!test_and_clear_bit(CACHE_SET_IO_DISABLE, |
|
&c->flags)) |
|
pr_warn("CACHE_SET_IO_DISABLE already cleared\n"); |
|
} |
|
} |
|
|
|
sysfs_strtoul_clamp(journal_delay_ms, |
|
c->journal_delay_ms, |
|
0, USHRT_MAX); |
|
sysfs_strtoul_bool(verify, c->verify); |
|
sysfs_strtoul_bool(key_merging_disabled, c->key_merging_disabled); |
|
sysfs_strtoul(expensive_debug_checks, c->expensive_debug_checks); |
|
sysfs_strtoul_bool(gc_always_rewrite, c->gc_always_rewrite); |
|
sysfs_strtoul_bool(btree_shrinker_disabled, c->shrinker_disabled); |
|
sysfs_strtoul_bool(copy_gc_enabled, c->copy_gc_enabled); |
|
sysfs_strtoul_bool(idle_max_writeback_rate, |
|
c->idle_max_writeback_rate_enabled); |
|
|
|
/* |
|
* write gc_after_writeback here may overwrite an already set |
|
* BCH_DO_AUTO_GC, it doesn't matter because this flag will be |
|
* set in next chance. |
|
*/ |
|
sysfs_strtoul_clamp(gc_after_writeback, c->gc_after_writeback, 0, 1); |
|
|
|
return size; |
|
} |
|
STORE_LOCKED(bch_cache_set) |
|
|
|
SHOW(bch_cache_set_internal) |
|
{ |
|
struct cache_set *c = container_of(kobj, struct cache_set, internal); |
|
|
|
return bch_cache_set_show(&c->kobj, attr, buf); |
|
} |
|
|
|
STORE(bch_cache_set_internal) |
|
{ |
|
struct cache_set *c = container_of(kobj, struct cache_set, internal); |
|
|
|
/* no user space access if system is rebooting */ |
|
if (bcache_is_reboot) |
|
return -EBUSY; |
|
|
|
return bch_cache_set_store(&c->kobj, attr, buf, size); |
|
} |
|
|
|
static void bch_cache_set_internal_release(struct kobject *k) |
|
{ |
|
} |
|
|
|
static struct attribute *bch_cache_set_attrs[] = { |
|
&sysfs_unregister, |
|
&sysfs_stop, |
|
&sysfs_synchronous, |
|
&sysfs_journal_delay_ms, |
|
&sysfs_flash_vol_create, |
|
|
|
&sysfs_bucket_size, |
|
&sysfs_block_size, |
|
&sysfs_tree_depth, |
|
&sysfs_root_usage_percent, |
|
&sysfs_btree_cache_size, |
|
&sysfs_cache_available_percent, |
|
|
|
&sysfs_average_key_size, |
|
|
|
&sysfs_errors, |
|
&sysfs_io_error_limit, |
|
&sysfs_io_error_halflife, |
|
&sysfs_congested, |
|
&sysfs_congested_read_threshold_us, |
|
&sysfs_congested_write_threshold_us, |
|
&sysfs_clear_stats, |
|
NULL |
|
}; |
|
ATTRIBUTE_GROUPS(bch_cache_set); |
|
KTYPE(bch_cache_set); |
|
|
|
static struct attribute *bch_cache_set_internal_attrs[] = { |
|
&sysfs_active_journal_entries, |
|
|
|
sysfs_time_stats_attribute_list(btree_gc, sec, ms) |
|
sysfs_time_stats_attribute_list(btree_split, sec, us) |
|
sysfs_time_stats_attribute_list(btree_sort, ms, us) |
|
sysfs_time_stats_attribute_list(btree_read, ms, us) |
|
|
|
&sysfs_btree_nodes, |
|
&sysfs_btree_used_percent, |
|
&sysfs_btree_cache_max_chain, |
|
|
|
&sysfs_bset_tree_stats, |
|
&sysfs_cache_read_races, |
|
&sysfs_reclaim, |
|
&sysfs_reclaimed_journal_buckets, |
|
&sysfs_flush_write, |
|
&sysfs_writeback_keys_done, |
|
&sysfs_writeback_keys_failed, |
|
|
|
&sysfs_trigger_gc, |
|
&sysfs_prune_cache, |
|
#ifdef CONFIG_BCACHE_DEBUG |
|
&sysfs_verify, |
|
&sysfs_key_merging_disabled, |
|
&sysfs_expensive_debug_checks, |
|
#endif |
|
&sysfs_gc_always_rewrite, |
|
&sysfs_btree_shrinker_disabled, |
|
&sysfs_copy_gc_enabled, |
|
&sysfs_idle_max_writeback_rate, |
|
&sysfs_gc_after_writeback, |
|
&sysfs_io_disable, |
|
&sysfs_cutoff_writeback, |
|
&sysfs_cutoff_writeback_sync, |
|
&sysfs_feature_compat, |
|
&sysfs_feature_ro_compat, |
|
&sysfs_feature_incompat, |
|
NULL |
|
}; |
|
ATTRIBUTE_GROUPS(bch_cache_set_internal); |
|
KTYPE(bch_cache_set_internal); |
|
|
|
static int __bch_cache_cmp(const void *l, const void *r) |
|
{ |
|
cond_resched(); |
|
return *((uint16_t *)r) - *((uint16_t *)l); |
|
} |
|
|
|
SHOW(__bch_cache) |
|
{ |
|
struct cache *ca = container_of(kobj, struct cache, kobj); |
|
|
|
sysfs_hprint(bucket_size, bucket_bytes(ca)); |
|
sysfs_hprint(block_size, block_bytes(ca)); |
|
sysfs_print(nbuckets, ca->sb.nbuckets); |
|
sysfs_print(discard, ca->discard); |
|
sysfs_hprint(written, atomic_long_read(&ca->sectors_written) << 9); |
|
sysfs_hprint(btree_written, |
|
atomic_long_read(&ca->btree_sectors_written) << 9); |
|
sysfs_hprint(metadata_written, |
|
(atomic_long_read(&ca->meta_sectors_written) + |
|
atomic_long_read(&ca->btree_sectors_written)) << 9); |
|
|
|
sysfs_print(io_errors, |
|
atomic_read(&ca->io_errors) >> IO_ERROR_SHIFT); |
|
|
|
if (attr == &sysfs_cache_replacement_policy) |
|
return bch_snprint_string_list(buf, PAGE_SIZE, |
|
cache_replacement_policies, |
|
CACHE_REPLACEMENT(&ca->sb)); |
|
|
|
if (attr == &sysfs_priority_stats) { |
|
struct bucket *b; |
|
size_t n = ca->sb.nbuckets, i; |
|
size_t unused = 0, available = 0, dirty = 0, meta = 0; |
|
uint64_t sum = 0; |
|
/* Compute 31 quantiles */ |
|
uint16_t q[31], *p, *cached; |
|
ssize_t ret; |
|
|
|
cached = p = vmalloc(array_size(sizeof(uint16_t), |
|
ca->sb.nbuckets)); |
|
if (!p) |
|
return -ENOMEM; |
|
|
|
mutex_lock(&ca->set->bucket_lock); |
|
for_each_bucket(b, ca) { |
|
if (!GC_SECTORS_USED(b)) |
|
unused++; |
|
if (GC_MARK(b) == GC_MARK_RECLAIMABLE) |
|
available++; |
|
if (GC_MARK(b) == GC_MARK_DIRTY) |
|
dirty++; |
|
if (GC_MARK(b) == GC_MARK_METADATA) |
|
meta++; |
|
} |
|
|
|
for (i = ca->sb.first_bucket; i < n; i++) |
|
p[i] = ca->buckets[i].prio; |
|
mutex_unlock(&ca->set->bucket_lock); |
|
|
|
sort(p, n, sizeof(uint16_t), __bch_cache_cmp, NULL); |
|
|
|
while (n && |
|
!cached[n - 1]) |
|
--n; |
|
|
|
while (cached < p + n && |
|
*cached == BTREE_PRIO) { |
|
cached++; |
|
n--; |
|
} |
|
|
|
for (i = 0; i < n; i++) |
|
sum += INITIAL_PRIO - cached[i]; |
|
|
|
if (n) |
|
do_div(sum, n); |
|
|
|
for (i = 0; i < ARRAY_SIZE(q); i++) |
|
q[i] = INITIAL_PRIO - cached[n * (i + 1) / |
|
(ARRAY_SIZE(q) + 1)]; |
|
|
|
vfree(p); |
|
|
|
ret = scnprintf(buf, PAGE_SIZE, |
|
"Unused: %zu%%\n" |
|
"Clean: %zu%%\n" |
|
"Dirty: %zu%%\n" |
|
"Metadata: %zu%%\n" |
|
"Average: %llu\n" |
|
"Sectors per Q: %zu\n" |
|
"Quantiles: [", |
|
unused * 100 / (size_t) ca->sb.nbuckets, |
|
available * 100 / (size_t) ca->sb.nbuckets, |
|
dirty * 100 / (size_t) ca->sb.nbuckets, |
|
meta * 100 / (size_t) ca->sb.nbuckets, sum, |
|
n * ca->sb.bucket_size / (ARRAY_SIZE(q) + 1)); |
|
|
|
for (i = 0; i < ARRAY_SIZE(q); i++) |
|
ret += scnprintf(buf + ret, PAGE_SIZE - ret, |
|
"%u ", q[i]); |
|
ret--; |
|
|
|
ret += scnprintf(buf + ret, PAGE_SIZE - ret, "]\n"); |
|
|
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
SHOW_LOCKED(bch_cache) |
|
|
|
STORE(__bch_cache) |
|
{ |
|
struct cache *ca = container_of(kobj, struct cache, kobj); |
|
ssize_t v; |
|
|
|
/* no user space access if system is rebooting */ |
|
if (bcache_is_reboot) |
|
return -EBUSY; |
|
|
|
if (attr == &sysfs_discard) { |
|
bool v = strtoul_or_return(buf); |
|
|
|
if (bdev_max_discard_sectors(ca->bdev)) |
|
ca->discard = v; |
|
|
|
if (v != CACHE_DISCARD(&ca->sb)) { |
|
SET_CACHE_DISCARD(&ca->sb, v); |
|
bcache_write_super(ca->set); |
|
} |
|
} |
|
|
|
if (attr == &sysfs_cache_replacement_policy) { |
|
v = __sysfs_match_string(cache_replacement_policies, -1, buf); |
|
if (v < 0) |
|
return v; |
|
|
|
if ((unsigned int) v != CACHE_REPLACEMENT(&ca->sb)) { |
|
mutex_lock(&ca->set->bucket_lock); |
|
SET_CACHE_REPLACEMENT(&ca->sb, v); |
|
mutex_unlock(&ca->set->bucket_lock); |
|
|
|
bcache_write_super(ca->set); |
|
} |
|
} |
|
|
|
if (attr == &sysfs_clear_stats) { |
|
atomic_long_set(&ca->sectors_written, 0); |
|
atomic_long_set(&ca->btree_sectors_written, 0); |
|
atomic_long_set(&ca->meta_sectors_written, 0); |
|
atomic_set(&ca->io_count, 0); |
|
atomic_set(&ca->io_errors, 0); |
|
} |
|
|
|
return size; |
|
} |
|
STORE_LOCKED(bch_cache) |
|
|
|
static struct attribute *bch_cache_attrs[] = { |
|
&sysfs_bucket_size, |
|
&sysfs_block_size, |
|
&sysfs_nbuckets, |
|
&sysfs_priority_stats, |
|
&sysfs_discard, |
|
&sysfs_written, |
|
&sysfs_btree_written, |
|
&sysfs_metadata_written, |
|
&sysfs_io_errors, |
|
&sysfs_clear_stats, |
|
&sysfs_cache_replacement_policy, |
|
NULL |
|
}; |
|
ATTRIBUTE_GROUPS(bch_cache); |
|
KTYPE(bch_cache);
|
|
|