swh:1:snp:49cd9498d6cccc5e78252c27dcb645bcf7bf0c91
Tip revision: 464e1d5f23cca236b930ef068c328a64cab78fb1 authored by Linus Torvalds on 24 December 2017, 04:47:16 UTC
Linux 4.15-rc5
Linux 4.15-rc5
Tip revision: 464e1d5
pblk-sysfs.c
/*
* Copyright (C) 2016 CNEX Labs
* Initial release: Javier Gonzalez <javier@cnexlabs.com>
* Matias Bjorling <matias@cnexlabs.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* Implementation of a physical block-device target for Open-channel SSDs.
*
* pblk-sysfs.c - pblk's sysfs
*
*/
#include "pblk.h"
static ssize_t pblk_sysfs_luns_show(struct pblk *pblk, char *page)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_lun *rlun;
ssize_t sz = 0;
int i;
for (i = 0; i < geo->nr_luns; i++) {
int active = 1;
rlun = &pblk->luns[i];
if (!down_trylock(&rlun->wr_sem)) {
active = 0;
up(&rlun->wr_sem);
}
sz += snprintf(page + sz, PAGE_SIZE - sz,
"pblk: pos:%d, ch:%d, lun:%d - %d\n",
i,
rlun->bppa.g.ch,
rlun->bppa.g.lun,
active);
}
return sz;
}
static ssize_t pblk_sysfs_rate_limiter(struct pblk *pblk, char *page)
{
int free_blocks, total_blocks;
int rb_user_max, rb_user_cnt;
int rb_gc_max, rb_gc_cnt, rb_budget, rb_state;
free_blocks = atomic_read(&pblk->rl.free_blocks);
rb_user_max = pblk->rl.rb_user_max;
rb_user_cnt = atomic_read(&pblk->rl.rb_user_cnt);
rb_gc_max = pblk->rl.rb_gc_max;
rb_gc_cnt = atomic_read(&pblk->rl.rb_gc_cnt);
rb_budget = pblk->rl.rb_budget;
rb_state = pblk->rl.rb_state;
total_blocks = pblk->rl.total_blocks;
return snprintf(page, PAGE_SIZE,
"u:%u/%u,gc:%u/%u(%u/%u)(stop:<%u,full:>%u,free:%d/%d)-%d\n",
rb_user_cnt,
rb_user_max,
rb_gc_cnt,
rb_gc_max,
rb_state,
rb_budget,
pblk->rl.low,
pblk->rl.high,
free_blocks,
total_blocks,
READ_ONCE(pblk->rl.rb_user_active));
}
static ssize_t pblk_sysfs_gc_state_show(struct pblk *pblk, char *page)
{
int gc_enabled, gc_active;
pblk_gc_sysfs_state_show(pblk, &gc_enabled, &gc_active);
return snprintf(page, PAGE_SIZE, "gc_enabled=%d, gc_active=%d\n",
gc_enabled, gc_active);
}
static ssize_t pblk_sysfs_stats(struct pblk *pblk, char *page)
{
ssize_t sz;
sz = snprintf(page, PAGE_SIZE,
"read_failed=%lu, read_high_ecc=%lu, read_empty=%lu, read_failed_gc=%lu, write_failed=%lu, erase_failed=%lu\n",
atomic_long_read(&pblk->read_failed),
atomic_long_read(&pblk->read_high_ecc),
atomic_long_read(&pblk->read_empty),
atomic_long_read(&pblk->read_failed_gc),
atomic_long_read(&pblk->write_failed),
atomic_long_read(&pblk->erase_failed));
return sz;
}
static ssize_t pblk_sysfs_write_buffer(struct pblk *pblk, char *page)
{
return pblk_rb_sysfs(&pblk->rwb, page);
}
static ssize_t pblk_sysfs_ppaf(struct pblk *pblk, char *page)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
ssize_t sz = 0;
sz = snprintf(page, PAGE_SIZE - sz,
"g:(b:%d)blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
pblk->ppaf_bitsize,
pblk->ppaf.blk_offset, geo->ppaf.blk_len,
pblk->ppaf.pg_offset, geo->ppaf.pg_len,
pblk->ppaf.lun_offset, geo->ppaf.lun_len,
pblk->ppaf.ch_offset, geo->ppaf.ch_len,
pblk->ppaf.pln_offset, geo->ppaf.pln_len,
pblk->ppaf.sec_offset, geo->ppaf.sect_len);
sz += snprintf(page + sz, PAGE_SIZE - sz,
"d:blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
geo->ppaf.blk_offset, geo->ppaf.blk_len,
geo->ppaf.pg_offset, geo->ppaf.pg_len,
geo->ppaf.lun_offset, geo->ppaf.lun_len,
geo->ppaf.ch_offset, geo->ppaf.ch_len,
geo->ppaf.pln_offset, geo->ppaf.pln_len,
geo->ppaf.sect_offset, geo->ppaf.sect_len);
return sz;
}
static ssize_t pblk_sysfs_lines(struct pblk *pblk, char *page)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line *line;
ssize_t sz = 0;
int nr_free_lines;
int cur_data, cur_log;
int free_line_cnt = 0, closed_line_cnt = 0, emeta_line_cnt = 0;
int d_line_cnt = 0, l_line_cnt = 0;
int gc_full = 0, gc_high = 0, gc_mid = 0, gc_low = 0, gc_empty = 0;
int bad = 0, cor = 0;
int msecs = 0, cur_sec = 0, vsc = 0, sec_in_line = 0;
int map_weight = 0, meta_weight = 0;
spin_lock(&l_mg->free_lock);
cur_data = (l_mg->data_line) ? l_mg->data_line->id : -1;
cur_log = (l_mg->log_line) ? l_mg->log_line->id : -1;
nr_free_lines = l_mg->nr_free_lines;
list_for_each_entry(line, &l_mg->free_list, list)
free_line_cnt++;
spin_unlock(&l_mg->free_lock);
spin_lock(&l_mg->close_lock);
list_for_each_entry(line, &l_mg->emeta_list, list)
emeta_line_cnt++;
spin_unlock(&l_mg->close_lock);
spin_lock(&l_mg->gc_lock);
list_for_each_entry(line, &l_mg->gc_full_list, list) {
if (line->type == PBLK_LINETYPE_DATA)
d_line_cnt++;
else if (line->type == PBLK_LINETYPE_LOG)
l_line_cnt++;
closed_line_cnt++;
gc_full++;
}
list_for_each_entry(line, &l_mg->gc_high_list, list) {
if (line->type == PBLK_LINETYPE_DATA)
d_line_cnt++;
else if (line->type == PBLK_LINETYPE_LOG)
l_line_cnt++;
closed_line_cnt++;
gc_high++;
}
list_for_each_entry(line, &l_mg->gc_mid_list, list) {
if (line->type == PBLK_LINETYPE_DATA)
d_line_cnt++;
else if (line->type == PBLK_LINETYPE_LOG)
l_line_cnt++;
closed_line_cnt++;
gc_mid++;
}
list_for_each_entry(line, &l_mg->gc_low_list, list) {
if (line->type == PBLK_LINETYPE_DATA)
d_line_cnt++;
else if (line->type == PBLK_LINETYPE_LOG)
l_line_cnt++;
closed_line_cnt++;
gc_low++;
}
list_for_each_entry(line, &l_mg->gc_empty_list, list) {
if (line->type == PBLK_LINETYPE_DATA)
d_line_cnt++;
else if (line->type == PBLK_LINETYPE_LOG)
l_line_cnt++;
closed_line_cnt++;
gc_empty++;
}
list_for_each_entry(line, &l_mg->bad_list, list)
bad++;
list_for_each_entry(line, &l_mg->corrupt_list, list)
cor++;
spin_unlock(&l_mg->gc_lock);
spin_lock(&l_mg->free_lock);
if (l_mg->data_line) {
cur_sec = l_mg->data_line->cur_sec;
msecs = l_mg->data_line->left_msecs;
vsc = le32_to_cpu(*l_mg->data_line->vsc);
sec_in_line = l_mg->data_line->sec_in_line;
meta_weight = bitmap_weight(&l_mg->meta_bitmap,
PBLK_DATA_LINES);
map_weight = bitmap_weight(l_mg->data_line->map_bitmap,
lm->sec_per_line);
}
spin_unlock(&l_mg->free_lock);
if (nr_free_lines != free_line_cnt)
pr_err("pblk: corrupted free line list:%d/%d\n",
nr_free_lines, free_line_cnt);
sz = snprintf(page, PAGE_SIZE - sz,
"line: nluns:%d, nblks:%d, nsecs:%d\n",
geo->nr_luns, lm->blk_per_line, lm->sec_per_line);
sz += snprintf(page + sz, PAGE_SIZE - sz,
"lines:d:%d,l:%d-f:%d,m:%d/%d,c:%d,b:%d,co:%d(d:%d,l:%d)t:%d\n",
cur_data, cur_log,
nr_free_lines,
emeta_line_cnt, meta_weight,
closed_line_cnt,
bad, cor,
d_line_cnt, l_line_cnt,
l_mg->nr_lines);
sz += snprintf(page + sz, PAGE_SIZE - sz,
"GC: full:%d, high:%d, mid:%d, low:%d, empty:%d, queue:%d\n",
gc_full, gc_high, gc_mid, gc_low, gc_empty,
atomic_read(&pblk->gc.read_inflight_gc));
sz += snprintf(page + sz, PAGE_SIZE - sz,
"data (%d) cur:%d, left:%d, vsc:%d, s:%d, map:%d/%d (%d)\n",
cur_data, cur_sec, msecs, vsc, sec_in_line,
map_weight, lm->sec_per_line,
atomic_read(&pblk->inflight_io));
return sz;
}
static ssize_t pblk_sysfs_lines_info(struct pblk *pblk, char *page)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_line_meta *lm = &pblk->lm;
ssize_t sz = 0;
sz = snprintf(page, PAGE_SIZE - sz,
"smeta - len:%d, secs:%d\n",
lm->smeta_len, lm->smeta_sec);
sz += snprintf(page + sz, PAGE_SIZE - sz,
"emeta - len:%d, sec:%d, bb_start:%d\n",
lm->emeta_len[0], lm->emeta_sec[0],
lm->emeta_bb);
sz += snprintf(page + sz, PAGE_SIZE - sz,
"bitmap lengths: sec:%d, blk:%d, lun:%d\n",
lm->sec_bitmap_len,
lm->blk_bitmap_len,
lm->lun_bitmap_len);
sz += snprintf(page + sz, PAGE_SIZE - sz,
"blk_line:%d, sec_line:%d, sec_blk:%d\n",
lm->blk_per_line,
lm->sec_per_line,
geo->sec_per_blk);
return sz;
}
static ssize_t pblk_sysfs_get_sec_per_write(struct pblk *pblk, char *page)
{
return snprintf(page, PAGE_SIZE, "%d\n", pblk->sec_per_write);
}
#ifdef CONFIG_NVM_DEBUG
static ssize_t pblk_sysfs_stats_debug(struct pblk *pblk, char *page)
{
return snprintf(page, PAGE_SIZE,
"%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\n",
atomic_long_read(&pblk->inflight_writes),
atomic_long_read(&pblk->inflight_reads),
atomic_long_read(&pblk->req_writes),
atomic_long_read(&pblk->nr_flush),
atomic_long_read(&pblk->padded_writes),
atomic_long_read(&pblk->padded_wb),
atomic_long_read(&pblk->sub_writes),
atomic_long_read(&pblk->sync_writes),
atomic_long_read(&pblk->recov_writes),
atomic_long_read(&pblk->recov_gc_writes),
atomic_long_read(&pblk->recov_gc_reads),
atomic_long_read(&pblk->cache_reads),
atomic_long_read(&pblk->sync_reads));
}
#endif
static ssize_t pblk_sysfs_gc_force(struct pblk *pblk, const char *page,
size_t len)
{
size_t c_len;
int force;
c_len = strcspn(page, "\n");
if (c_len >= len)
return -EINVAL;
if (kstrtouint(page, 0, &force))
return -EINVAL;
pblk_gc_sysfs_force(pblk, force);
return len;
}
static ssize_t pblk_sysfs_set_sec_per_write(struct pblk *pblk,
const char *page, size_t len)
{
size_t c_len;
int sec_per_write;
c_len = strcspn(page, "\n");
if (c_len >= len)
return -EINVAL;
if (kstrtouint(page, 0, &sec_per_write))
return -EINVAL;
if (sec_per_write < pblk->min_write_pgs
|| sec_per_write > pblk->max_write_pgs
|| sec_per_write % pblk->min_write_pgs != 0)
return -EINVAL;
pblk_set_sec_per_write(pblk, sec_per_write);
return len;
}
static struct attribute sys_write_luns = {
.name = "write_luns",
.mode = 0444,
};
static struct attribute sys_rate_limiter_attr = {
.name = "rate_limiter",
.mode = 0444,
};
static struct attribute sys_gc_state = {
.name = "gc_state",
.mode = 0444,
};
static struct attribute sys_errors_attr = {
.name = "errors",
.mode = 0444,
};
static struct attribute sys_rb_attr = {
.name = "write_buffer",
.mode = 0444,
};
static struct attribute sys_stats_ppaf_attr = {
.name = "ppa_format",
.mode = 0444,
};
static struct attribute sys_lines_attr = {
.name = "lines",
.mode = 0444,
};
static struct attribute sys_lines_info_attr = {
.name = "lines_info",
.mode = 0444,
};
static struct attribute sys_gc_force = {
.name = "gc_force",
.mode = 0200,
};
static struct attribute sys_max_sec_per_write = {
.name = "max_sec_per_write",
.mode = 0644,
};
#ifdef CONFIG_NVM_DEBUG
static struct attribute sys_stats_debug_attr = {
.name = "stats",
.mode = 0444,
};
#endif
static struct attribute *pblk_attrs[] = {
&sys_write_luns,
&sys_rate_limiter_attr,
&sys_errors_attr,
&sys_gc_state,
&sys_gc_force,
&sys_max_sec_per_write,
&sys_rb_attr,
&sys_stats_ppaf_attr,
&sys_lines_attr,
&sys_lines_info_attr,
#ifdef CONFIG_NVM_DEBUG
&sys_stats_debug_attr,
#endif
NULL,
};
static ssize_t pblk_sysfs_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct pblk *pblk = container_of(kobj, struct pblk, kobj);
if (strcmp(attr->name, "rate_limiter") == 0)
return pblk_sysfs_rate_limiter(pblk, buf);
else if (strcmp(attr->name, "write_luns") == 0)
return pblk_sysfs_luns_show(pblk, buf);
else if (strcmp(attr->name, "gc_state") == 0)
return pblk_sysfs_gc_state_show(pblk, buf);
else if (strcmp(attr->name, "errors") == 0)
return pblk_sysfs_stats(pblk, buf);
else if (strcmp(attr->name, "write_buffer") == 0)
return pblk_sysfs_write_buffer(pblk, buf);
else if (strcmp(attr->name, "ppa_format") == 0)
return pblk_sysfs_ppaf(pblk, buf);
else if (strcmp(attr->name, "lines") == 0)
return pblk_sysfs_lines(pblk, buf);
else if (strcmp(attr->name, "lines_info") == 0)
return pblk_sysfs_lines_info(pblk, buf);
else if (strcmp(attr->name, "max_sec_per_write") == 0)
return pblk_sysfs_get_sec_per_write(pblk, buf);
#ifdef CONFIG_NVM_DEBUG
else if (strcmp(attr->name, "stats") == 0)
return pblk_sysfs_stats_debug(pblk, buf);
#endif
return 0;
}
static ssize_t pblk_sysfs_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t len)
{
struct pblk *pblk = container_of(kobj, struct pblk, kobj);
if (strcmp(attr->name, "gc_force") == 0)
return pblk_sysfs_gc_force(pblk, buf, len);
else if (strcmp(attr->name, "max_sec_per_write") == 0)
return pblk_sysfs_set_sec_per_write(pblk, buf, len);
return 0;
}
static const struct sysfs_ops pblk_sysfs_ops = {
.show = pblk_sysfs_show,
.store = pblk_sysfs_store,
};
static struct kobj_type pblk_ktype = {
.sysfs_ops = &pblk_sysfs_ops,
.default_attrs = pblk_attrs,
};
int pblk_sysfs_init(struct gendisk *tdisk)
{
struct pblk *pblk = tdisk->private_data;
struct device *parent_dev = disk_to_dev(pblk->disk);
int ret;
ret = kobject_init_and_add(&pblk->kobj, &pblk_ktype,
kobject_get(&parent_dev->kobj),
"%s", "pblk");
if (ret) {
pr_err("pblk: could not register %s/pblk\n",
tdisk->disk_name);
return ret;
}
kobject_uevent(&pblk->kobj, KOBJ_ADD);
return 0;
}
void pblk_sysfs_exit(struct gendisk *tdisk)
{
struct pblk *pblk = tdisk->private_data;
kobject_uevent(&pblk->kobj, KOBJ_REMOVE);
kobject_del(&pblk->kobj);
kobject_put(&pblk->kobj);
}