sysfs.c
// SPDX-License-Identifier: GPL-2.0
/*
* bcache sysfs interfaces
*
* Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com>
* Copyright 2012 Google, Inc.
*/
#ifndef NO_BCACHEFS_SYSFS
#include "bcachefs.h"
#include "alloc_background.h"
#include "alloc_foreground.h"
#include "sysfs.h"
#include "btree_cache.h"
#include "btree_io.h"
#include "btree_iter.h"
#include "btree_key_cache.h"
#include "btree_update.h"
#include "btree_update_interior.h"
#include "btree_gc.h"
#include "buckets.h"
#include "clock.h"
#include "compress.h"
#include "disk_groups.h"
#include "ec.h"
#include "inode.h"
#include "journal.h"
#include "keylist.h"
#include "move.h"
#include "movinggc.h"
#include "nocow_locking.h"
#include "opts.h"
#include "rebalance.h"
#include "replicas.h"
#include "super-io.h"
#include "tests.h"
#include <linux/blkdev.h>
#include <linux/sort.h>
#include <linux/sched/clock.h>
#include "util.h"
#define SYSFS_OPS(type) \
const struct sysfs_ops type ## _sysfs_ops = { \
.show = type ## _show, \
.store = type ## _store \
}
#define SHOW(fn) \
static ssize_t fn ## _to_text(struct printbuf *, \
struct kobject *, struct attribute *); \
\
static ssize_t fn ## _show(struct kobject *kobj, struct attribute *attr,\
char *buf) \
{ \
struct printbuf out = PRINTBUF; \
ssize_t ret = fn ## _to_text(&out, kobj, attr); \
\
if (out.pos && out.buf[out.pos - 1] != '\n') \
prt_newline(&out); \
\
if (!ret && out.allocation_failure) \
ret = -ENOMEM; \
\
if (!ret) { \
ret = min_t(size_t, out.pos, PAGE_SIZE - 1); \
memcpy(buf, out.buf, ret); \
} \
printbuf_exit(&out); \
return bch2_err_class(ret); \
} \
\
static ssize_t fn ## _to_text(struct printbuf *out, struct kobject *kobj,\
struct attribute *attr)
#define STORE(fn) \
static ssize_t fn ## _store_inner(struct kobject *, struct attribute *,\
const char *, size_t); \
\
static ssize_t fn ## _store(struct kobject *kobj, struct attribute *attr,\
const char *buf, size_t size) \
{ \
return bch2_err_class(fn##_store_inner(kobj, attr, buf, size)); \
} \
\
static ssize_t fn ## _store_inner(struct kobject *kobj, struct attribute *attr,\
const char *buf, size_t size)
#define __sysfs_attribute(_name, _mode) \
static struct attribute sysfs_##_name = \
{ .name = #_name, .mode = _mode }
#define write_attribute(n) __sysfs_attribute(n, 0200)
#define read_attribute(n) __sysfs_attribute(n, 0444)
#define rw_attribute(n) __sysfs_attribute(n, 0644)
#define sysfs_printf(file, fmt, ...) \
do { \
if (attr == &sysfs_ ## file) \
prt_printf(out, fmt "\n", __VA_ARGS__); \
} while (0)
#define sysfs_print(file, var) \
do { \
if (attr == &sysfs_ ## file) \
snprint(out, var); \
} while (0)
#define sysfs_hprint(file, val) \
do { \
if (attr == &sysfs_ ## file) \
prt_human_readable_s64(out, val); \
} while (0)
#define sysfs_strtoul(file, var) \
do { \
if (attr == &sysfs_ ## file) \
return strtoul_safe(buf, var) ?: (ssize_t) size; \
} while (0)
#define sysfs_strtoul_clamp(file, var, min, max) \
do { \
if (attr == &sysfs_ ## file) \
return strtoul_safe_clamp(buf, var, min, max) \
?: (ssize_t) size; \
} while (0)
#define strtoul_or_return(cp) \
({ \
unsigned long _v; \
int _r = kstrtoul(cp, 10, &_v); \
if (_r) \
return _r; \
_v; \
})
write_attribute(trigger_gc);
write_attribute(trigger_discards);
write_attribute(trigger_invalidates);
write_attribute(prune_cache);
write_attribute(btree_wakeup);
rw_attribute(btree_gc_periodic);
rw_attribute(gc_gens_pos);
read_attribute(uuid);
read_attribute(minor);
read_attribute(flags);
read_attribute(bucket_size);
read_attribute(first_bucket);
read_attribute(nbuckets);
rw_attribute(durability);
read_attribute(io_done);
read_attribute(io_errors);
write_attribute(io_errors_reset);
read_attribute(io_latency_read);
read_attribute(io_latency_write);
read_attribute(io_latency_stats_read);
read_attribute(io_latency_stats_write);
read_attribute(congested);
read_attribute(btree_write_stats);
read_attribute(btree_cache_size);
read_attribute(compression_stats);
read_attribute(journal_debug);
read_attribute(btree_updates);
read_attribute(btree_cache);
read_attribute(btree_key_cache);
read_attribute(stripes_heap);
read_attribute(open_buckets);
read_attribute(open_buckets_partial);
read_attribute(write_points);
read_attribute(nocow_lock_table);
#ifdef BCH_WRITE_REF_DEBUG
read_attribute(write_refs);
static const char * const bch2_write_refs[] = {
#define x(n) #n,
BCH_WRITE_REFS()
#undef x
NULL
};
static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
{
bch2_printbuf_tabstop_push(out, 24);
for (unsigned i = 0; i < ARRAY_SIZE(c->writes); i++) {
prt_str(out, bch2_write_refs[i]);
prt_tab(out);
prt_printf(out, "%li", atomic_long_read(&c->writes[i]));
prt_newline(out);
}
}
#endif
read_attribute(internal_uuid);
read_attribute(disk_groups);
read_attribute(has_data);
read_attribute(alloc_debug);
#define x(t, n, ...) read_attribute(t);
BCH_PERSISTENT_COUNTERS()
#undef x
rw_attribute(discard);
rw_attribute(label);
rw_attribute(copy_gc_enabled);
read_attribute(copy_gc_wait);
rw_attribute(rebalance_enabled);
sysfs_pd_controller_attribute(rebalance);
read_attribute(rebalance_status);
rw_attribute(promote_whole_extents);
read_attribute(new_stripes);
read_attribute(io_timers_read);
read_attribute(io_timers_write);
read_attribute(moving_ctxts);
#ifdef CONFIG_BCACHEFS_TESTS
write_attribute(perf_test);
#endif /* CONFIG_BCACHEFS_TESTS */
#define x(_name) \
static struct attribute sysfs_time_stat_##_name = \
{ .name = #_name, .mode = 0444 };
BCH_TIME_STATS()
#undef x
static struct attribute sysfs_state_rw = {
.name = "state",
.mode = 0444,
};
static size_t bch2_btree_cache_size(struct bch_fs *c)
{
size_t ret = 0;
struct btree *b;
mutex_lock(&c->btree_cache.lock);
list_for_each_entry(b, &c->btree_cache.live, list)
ret += btree_buf_bytes(b);
mutex_unlock(&c->btree_cache.lock);
return ret;
}
static int bch2_compression_stats_to_text(struct printbuf *out, struct bch_fs *c)
{
struct btree_trans *trans;
enum btree_id id;
struct compression_type_stats {
u64 nr_extents;
u64 sectors_compressed;
u64 sectors_uncompressed;
} s[BCH_COMPRESSION_TYPE_NR];
u64 compressed_incompressible = 0;
int ret = 0;
memset(s, 0, sizeof(s));
if (!test_bit(BCH_FS_started, &c->flags))
return -EPERM;
trans = bch2_trans_get(c);
for (id = 0; id < BTREE_ID_NR; id++) {
if (!btree_type_has_ptrs(id))
continue;
ret = for_each_btree_key(trans, iter, id, POS_MIN,
BTREE_ITER_ALL_SNAPSHOTS, k, ({
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
struct bch_extent_crc_unpacked crc;
const union bch_extent_entry *entry;
bool compressed = false, incompressible = false;
bkey_for_each_crc(k.k, ptrs, crc, entry) {
incompressible |= crc.compression_type == BCH_COMPRESSION_TYPE_incompressible;
compressed |= crc_is_compressed(crc);
if (crc_is_compressed(crc)) {
s[crc.compression_type].nr_extents++;
s[crc.compression_type].sectors_compressed += crc.compressed_size;
s[crc.compression_type].sectors_uncompressed += crc.uncompressed_size;
}
}
compressed_incompressible += compressed && incompressible;
if (!compressed) {
unsigned t = incompressible ? BCH_COMPRESSION_TYPE_incompressible : 0;
s[t].nr_extents++;
s[t].sectors_compressed += k.k->size;
s[t].sectors_uncompressed += k.k->size;
}
0;
}));
}
bch2_trans_put(trans);
if (ret)
return ret;
prt_str(out, "type");
printbuf_tabstop_push(out, 12);
prt_tab(out);
prt_str(out, "compressed");
printbuf_tabstop_push(out, 16);
prt_tab_rjust(out);
prt_str(out, "uncompressed");
printbuf_tabstop_push(out, 16);
prt_tab_rjust(out);
prt_str(out, "average extent size");
printbuf_tabstop_push(out, 24);
prt_tab_rjust(out);
prt_newline(out);
for (unsigned i = 0; i < ARRAY_SIZE(s); i++) {
bch2_prt_compression_type(out, i);
prt_tab(out);
prt_human_readable_u64(out, s[i].sectors_compressed << 9);
prt_tab_rjust(out);
prt_human_readable_u64(out, s[i].sectors_uncompressed << 9);
prt_tab_rjust(out);
prt_human_readable_u64(out, s[i].nr_extents
? div_u64(s[i].sectors_uncompressed << 9, s[i].nr_extents)
: 0);
prt_tab_rjust(out);
prt_newline(out);
}
if (compressed_incompressible) {
prt_printf(out, "%llu compressed & incompressible extents", compressed_incompressible);
prt_newline(out);
}
return 0;
}
static void bch2_gc_gens_pos_to_text(struct printbuf *out, struct bch_fs *c)
{
prt_printf(out, "%s: ", bch2_btree_id_str(c->gc_gens_btree));
bch2_bpos_to_text(out, c->gc_gens_pos);
prt_printf(out, "\n");
}
static void bch2_btree_wakeup_all(struct bch_fs *c)
{
struct btree_trans *trans;
seqmutex_lock(&c->btree_trans_lock);
list_for_each_entry(trans, &c->btree_trans_list, list) {
struct btree_bkey_cached_common *b = READ_ONCE(trans->locking);
if (b)
six_lock_wakeup_all(&b->lock);
}
seqmutex_unlock(&c->btree_trans_lock);
}
SHOW(bch2_fs)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
sysfs_print(minor, c->minor);
sysfs_printf(internal_uuid, "%pU", c->sb.uuid.b);
if (attr == &sysfs_flags)
prt_bitflags(out, bch2_fs_flag_strs, c->flags);
sysfs_hprint(btree_cache_size, bch2_btree_cache_size(c));
if (attr == &sysfs_btree_write_stats)
bch2_btree_write_stats_to_text(out, c);
sysfs_printf(btree_gc_periodic, "%u", (int) c->btree_gc_periodic);
if (attr == &sysfs_gc_gens_pos)
bch2_gc_gens_pos_to_text(out, c);
sysfs_printf(copy_gc_enabled, "%i", c->copy_gc_enabled);
sysfs_printf(rebalance_enabled, "%i", c->rebalance.enabled);
sysfs_pd_controller_show(rebalance, &c->rebalance.pd); /* XXX */
if (attr == &sysfs_copy_gc_wait)
bch2_copygc_wait_to_text(out, c);
if (attr == &sysfs_rebalance_status)
bch2_rebalance_status_to_text(out, c);
sysfs_print(promote_whole_extents, c->promote_whole_extents);
/* Debugging: */
if (attr == &sysfs_journal_debug)
bch2_journal_debug_to_text(out, &c->journal);
if (attr == &sysfs_btree_updates)
bch2_btree_updates_to_text(out, c);
if (attr == &sysfs_btree_cache)
bch2_btree_cache_to_text(out, c);
if (attr == &sysfs_btree_key_cache)
bch2_btree_key_cache_to_text(out, &c->btree_key_cache);
if (attr == &sysfs_stripes_heap)
bch2_stripes_heap_to_text(out, c);
if (attr == &sysfs_open_buckets)
bch2_open_buckets_to_text(out, c);
if (attr == &sysfs_open_buckets_partial)
bch2_open_buckets_partial_to_text(out, c);
if (attr == &sysfs_write_points)
bch2_write_points_to_text(out, c);
if (attr == &sysfs_compression_stats)
bch2_compression_stats_to_text(out, c);
if (attr == &sysfs_new_stripes)
bch2_new_stripes_to_text(out, c);
if (attr == &sysfs_io_timers_read)
bch2_io_timers_to_text(out, &c->io_clock[READ]);
if (attr == &sysfs_io_timers_write)
bch2_io_timers_to_text(out, &c->io_clock[WRITE]);
if (attr == &sysfs_moving_ctxts)
bch2_fs_moving_ctxts_to_text(out, c);
#ifdef BCH_WRITE_REF_DEBUG
if (attr == &sysfs_write_refs)
bch2_write_refs_to_text(out, c);
#endif
if (attr == &sysfs_nocow_lock_table)
bch2_nocow_locks_to_text(out, &c->nocow_locks);
if (attr == &sysfs_disk_groups)
bch2_disk_groups_to_text(out, c);
return 0;
}
STORE(bch2_fs)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
if (attr == &sysfs_btree_gc_periodic) {
ssize_t ret = strtoul_safe(buf, c->btree_gc_periodic)
?: (ssize_t) size;
wake_up_process(c->gc_thread);
return ret;
}
if (attr == &sysfs_copy_gc_enabled) {
ssize_t ret = strtoul_safe(buf, c->copy_gc_enabled)
?: (ssize_t) size;
if (c->copygc_thread)
wake_up_process(c->copygc_thread);
return ret;
}
if (attr == &sysfs_rebalance_enabled) {
ssize_t ret = strtoul_safe(buf, c->rebalance.enabled)
?: (ssize_t) size;
rebalance_wakeup(c);
return ret;
}
sysfs_pd_controller_store(rebalance, &c->rebalance.pd);
sysfs_strtoul(promote_whole_extents, c->promote_whole_extents);
/* Debugging: */
if (!test_bit(BCH_FS_started, &c->flags))
return -EPERM;
/* Debugging: */
if (!test_bit(BCH_FS_rw, &c->flags))
return -EROFS;
if (attr == &sysfs_prune_cache) {
struct shrink_control sc;
sc.gfp_mask = GFP_KERNEL;
sc.nr_to_scan = strtoul_or_return(buf);
c->btree_cache.shrink->scan_objects(c->btree_cache.shrink, &sc);
}
if (attr == &sysfs_btree_wakeup)
bch2_btree_wakeup_all(c);
if (attr == &sysfs_trigger_gc) {
/*
* Full gc is currently incompatible with btree key cache:
*/
#if 0
down_read(&c->state_lock);
bch2_gc(c, false, false);
up_read(&c->state_lock);
#else
bch2_gc_gens(c);
#endif
}
if (attr == &sysfs_trigger_discards)
bch2_do_discards(c);
if (attr == &sysfs_trigger_invalidates)
bch2_do_invalidates(c);
#ifdef CONFIG_BCACHEFS_TESTS
if (attr == &sysfs_perf_test) {
char *tmp = kstrdup(buf, GFP_KERNEL), *p = tmp;
char *test = strsep(&p, " \t\n");
char *nr_str = strsep(&p, " \t\n");
char *threads_str = strsep(&p, " \t\n");
unsigned threads;
u64 nr;
int ret = -EINVAL;
if (threads_str &&
!(ret = kstrtouint(threads_str, 10, &threads)) &&
!(ret = bch2_strtoull_h(nr_str, &nr)))
ret = bch2_btree_perf_test(c, test, nr, threads);
kfree(tmp);
if (ret)
size = ret;
}
#endif
return size;
}
SYSFS_OPS(bch2_fs);
struct attribute *bch2_fs_files[] = {
&sysfs_minor,
&sysfs_btree_cache_size,
&sysfs_btree_write_stats,
&sysfs_promote_whole_extents,
&sysfs_compression_stats,
#ifdef CONFIG_BCACHEFS_TESTS
&sysfs_perf_test,
#endif
NULL
};
/* counters dir */
SHOW(bch2_fs_counters)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj);
u64 counter = 0;
u64 counter_since_mount = 0;
printbuf_tabstop_push(out, 32);
#define x(t, ...) \
if (attr == &sysfs_##t) { \
counter = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\
counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\
prt_printf(out, "since mount:"); \
prt_tab(out); \
prt_human_readable_u64(out, counter_since_mount); \
prt_newline(out); \
\
prt_printf(out, "since filesystem creation:"); \
prt_tab(out); \
prt_human_readable_u64(out, counter); \
prt_newline(out); \
}
BCH_PERSISTENT_COUNTERS()
#undef x
return 0;
}
STORE(bch2_fs_counters) {
return 0;
}
SYSFS_OPS(bch2_fs_counters);
struct attribute *bch2_fs_counters_files[] = {
#define x(t, ...) \
&sysfs_##t,
BCH_PERSISTENT_COUNTERS()
#undef x
NULL
};
/* internal dir - just a wrapper */
SHOW(bch2_fs_internal)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
return bch2_fs_to_text(out, &c->kobj, attr);
}
STORE(bch2_fs_internal)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, internal);
return bch2_fs_store(&c->kobj, attr, buf, size);
}
SYSFS_OPS(bch2_fs_internal);
struct attribute *bch2_fs_internal_files[] = {
&sysfs_flags,
&sysfs_journal_debug,
&sysfs_btree_updates,
&sysfs_btree_cache,
&sysfs_btree_key_cache,
&sysfs_new_stripes,
&sysfs_stripes_heap,
&sysfs_open_buckets,
&sysfs_open_buckets_partial,
&sysfs_write_points,
#ifdef BCH_WRITE_REF_DEBUG
&sysfs_write_refs,
#endif
&sysfs_nocow_lock_table,
&sysfs_io_timers_read,
&sysfs_io_timers_write,
&sysfs_trigger_gc,
&sysfs_trigger_discards,
&sysfs_trigger_invalidates,
&sysfs_prune_cache,
&sysfs_btree_wakeup,
&sysfs_gc_gens_pos,
&sysfs_copy_gc_enabled,
&sysfs_copy_gc_wait,
&sysfs_rebalance_enabled,
&sysfs_rebalance_status,
sysfs_pd_controller_files(rebalance),
&sysfs_moving_ctxts,
&sysfs_internal_uuid,
&sysfs_disk_groups,
NULL
};
/* options */
SHOW(bch2_fs_opts_dir)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
const struct bch_option *opt = container_of(attr, struct bch_option, attr);
int id = opt - bch2_opt_table;
u64 v = bch2_opt_get_by_id(&c->opts, id);
bch2_opt_to_text(out, c, c->disk_sb.sb, opt, v, OPT_SHOW_FULL_LIST);
prt_char(out, '\n');
return 0;
}
STORE(bch2_fs_opts_dir)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, opts_dir);
const struct bch_option *opt = container_of(attr, struct bch_option, attr);
int ret, id = opt - bch2_opt_table;
char *tmp;
u64 v;
/*
* We don't need to take c->writes for correctness, but it eliminates an
* unsightly error message in the dmesg log when we're RO:
*/
if (unlikely(!bch2_write_ref_tryget(c, BCH_WRITE_REF_sysfs)))
return -EROFS;
tmp = kstrdup(buf, GFP_KERNEL);
if (!tmp) {
ret = -ENOMEM;
goto err;
}
ret = bch2_opt_parse(c, opt, strim(tmp), &v, NULL);
kfree(tmp);
if (ret < 0)
goto err;
ret = bch2_opt_check_may_set(c, id, v);
if (ret < 0)
goto err;
bch2_opt_set_sb(c, opt, v);
bch2_opt_set_by_id(&c->opts, id, v);
if (v &&
(id == Opt_background_target ||
id == Opt_background_compression ||
(id == Opt_compression && !c->opts.background_compression)))
bch2_set_rebalance_needs_scan(c, 0);
ret = size;
err:
bch2_write_ref_put(c, BCH_WRITE_REF_sysfs);
return ret;
}
SYSFS_OPS(bch2_fs_opts_dir);
struct attribute *bch2_fs_opts_dir_files[] = { NULL };
int bch2_opts_create_sysfs_files(struct kobject *kobj)
{
const struct bch_option *i;
int ret;
for (i = bch2_opt_table;
i < bch2_opt_table + bch2_opts_nr;
i++) {
if (!(i->flags & OPT_FS))
continue;
ret = sysfs_create_file(kobj, &i->attr);
if (ret)
return ret;
}
return 0;
}
/* time stats */
SHOW(bch2_fs_time_stats)
{
struct bch_fs *c = container_of(kobj, struct bch_fs, time_stats);
#define x(name) \
if (attr == &sysfs_time_stat_##name) \
bch2_time_stats_to_text(out, &c->times[BCH_TIME_##name]);
BCH_TIME_STATS()
#undef x
return 0;
}
STORE(bch2_fs_time_stats)
{
return size;
}
SYSFS_OPS(bch2_fs_time_stats);
struct attribute *bch2_fs_time_stats_files[] = {
#define x(name) \
&sysfs_time_stat_##name,
BCH_TIME_STATS()
#undef x
NULL
};
static void dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca)
{
struct bch_fs *c = ca->fs;
struct bch_dev_usage stats = bch2_dev_usage_read(ca);
unsigned i, nr[BCH_DATA_NR];
memset(nr, 0, sizeof(nr));
for (i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
nr[c->open_buckets[i].data_type]++;
printbuf_tabstop_push(out, 8);
printbuf_tabstop_push(out, 16);
printbuf_tabstop_push(out, 16);
printbuf_tabstop_push(out, 16);
printbuf_tabstop_push(out, 16);
bch2_dev_usage_to_text(out, &stats);
prt_newline(out);
prt_printf(out, "reserves:");
prt_newline(out);
for (i = 0; i < BCH_WATERMARK_NR; i++) {
prt_str(out, bch2_watermarks[i]);
prt_tab(out);
prt_u64(out, bch2_dev_buckets_reserved(ca, i));
prt_tab_rjust(out);
prt_newline(out);
}
prt_newline(out);
printbuf_tabstops_reset(out);
printbuf_tabstop_push(out, 24);
prt_str(out, "freelist_wait");
prt_tab(out);
prt_str(out, c->freelist_wait.list.first ? "waiting" : "empty");
prt_newline(out);
prt_str(out, "open buckets allocated");
prt_tab(out);
prt_u64(out, OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
prt_newline(out);
prt_str(out, "open buckets this dev");
prt_tab(out);
prt_u64(out, ca->nr_open_buckets);
prt_newline(out);
prt_str(out, "open buckets total");
prt_tab(out);
prt_u64(out, OPEN_BUCKETS_COUNT);
prt_newline(out);
prt_str(out, "open_buckets_wait");
prt_tab(out);
prt_str(out, c->open_buckets_wait.list.first ? "waiting" : "empty");
prt_newline(out);
prt_str(out, "open_buckets_btree");
prt_tab(out);
prt_u64(out, nr[BCH_DATA_btree]);
prt_newline(out);
prt_str(out, "open_buckets_user");
prt_tab(out);
prt_u64(out, nr[BCH_DATA_user]);
prt_newline(out);
prt_str(out, "buckets_to_invalidate");
prt_tab(out);
prt_u64(out, should_invalidate_buckets(ca, stats));
prt_newline(out);
prt_str(out, "btree reserve cache");
prt_tab(out);
prt_u64(out, c->btree_reserve_cache_nr);
prt_newline(out);
}
static const char * const bch2_rw[] = {
"read",
"write",
NULL
};
static void dev_io_done_to_text(struct printbuf *out, struct bch_dev *ca)
{
int rw, i;
for (rw = 0; rw < 2; rw++) {
prt_printf(out, "%s:\n", bch2_rw[rw]);
for (i = 1; i < BCH_DATA_NR; i++)
prt_printf(out, "%-12s:%12llu\n",
bch2_data_type_str(i),
percpu_u64_get(&ca->io_done->sectors[rw][i]) << 9);
}
}
SHOW(bch2_dev)
{
struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
struct bch_fs *c = ca->fs;
sysfs_printf(uuid, "%pU\n", ca->uuid.b);
sysfs_print(bucket_size, bucket_bytes(ca));
sysfs_print(first_bucket, ca->mi.first_bucket);
sysfs_print(nbuckets, ca->mi.nbuckets);
sysfs_print(durability, ca->mi.durability);
sysfs_print(discard, ca->mi.discard);
if (attr == &sysfs_label) {
if (ca->mi.group)
bch2_disk_path_to_text(out, c, ca->mi.group - 1);
prt_char(out, '\n');
}
if (attr == &sysfs_has_data) {
prt_bitflags(out, __bch2_data_types, bch2_dev_has_data(c, ca));
prt_char(out, '\n');
}
if (attr == &sysfs_state_rw) {
prt_string_option(out, bch2_member_states, ca->mi.state);
prt_char(out, '\n');
}
if (attr == &sysfs_io_done)
dev_io_done_to_text(out, ca);
if (attr == &sysfs_io_errors)
bch2_dev_io_errors_to_text(out, ca);
sysfs_print(io_latency_read, atomic64_read(&ca->cur_latency[READ]));
sysfs_print(io_latency_write, atomic64_read(&ca->cur_latency[WRITE]));
if (attr == &sysfs_io_latency_stats_read)
bch2_time_stats_to_text(out, &ca->io_latency[READ].stats);
if (attr == &sysfs_io_latency_stats_write)
bch2_time_stats_to_text(out, &ca->io_latency[WRITE].stats);
sysfs_printf(congested, "%u%%",
clamp(atomic_read(&ca->congested), 0, CONGESTED_MAX)
* 100 / CONGESTED_MAX);
if (attr == &sysfs_alloc_debug)
dev_alloc_debug_to_text(out, ca);
return 0;
}
STORE(bch2_dev)
{
struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj);
struct bch_fs *c = ca->fs;
struct bch_member *mi;
if (attr == &sysfs_discard) {
bool v = strtoul_or_return(buf);
mutex_lock(&c->sb_lock);
mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
if (v != BCH_MEMBER_DISCARD(mi)) {
SET_BCH_MEMBER_DISCARD(mi, v);
bch2_write_super(c);
}
mutex_unlock(&c->sb_lock);
}
if (attr == &sysfs_durability) {
u64 v = strtoul_or_return(buf);
mutex_lock(&c->sb_lock);
mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
if (v + 1 != BCH_MEMBER_DURABILITY(mi)) {
SET_BCH_MEMBER_DURABILITY(mi, v + 1);
bch2_write_super(c);
}
mutex_unlock(&c->sb_lock);
}
if (attr == &sysfs_label) {
char *tmp;
int ret;
tmp = kstrdup(buf, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
ret = bch2_dev_group_set(c, ca, strim(tmp));
kfree(tmp);
if (ret)
return ret;
}
if (attr == &sysfs_io_errors_reset)
bch2_dev_errors_reset(ca);
return size;
}
SYSFS_OPS(bch2_dev);
struct attribute *bch2_dev_files[] = {
&sysfs_uuid,
&sysfs_bucket_size,
&sysfs_first_bucket,
&sysfs_nbuckets,
&sysfs_durability,
/* settings: */
&sysfs_discard,
&sysfs_state_rw,
&sysfs_label,
&sysfs_has_data,
&sysfs_io_done,
&sysfs_io_errors,
&sysfs_io_errors_reset,
&sysfs_io_latency_read,
&sysfs_io_latency_write,
&sysfs_io_latency_stats_read,
&sysfs_io_latency_stats_write,
&sysfs_congested,
/* debug: */
&sysfs_alloc_debug,
NULL
};
#endif /* _BCACHEFS_SYSFS_H_ */
