forked from Minki/linux
3b2a3ad119
Implement 2.0 support in pblk. This includes the address formatting and mapping paths, as well as the sysfs entries for them. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
706 lines
18 KiB
C
706 lines
18 KiB
C
/*
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* Copyright (C) 2016 CNEX Labs
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* Initial release: Javier Gonzalez <javier@cnexlabs.com>
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* Matias Bjorling <matias@cnexlabs.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Implementation of a physical block-device target for Open-channel SSDs.
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*
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* pblk-sysfs.c - pblk's sysfs
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*
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*/
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#include "pblk.h"
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static ssize_t pblk_sysfs_luns_show(struct pblk *pblk, char *page)
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{
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struct nvm_tgt_dev *dev = pblk->dev;
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struct nvm_geo *geo = &dev->geo;
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struct pblk_lun *rlun;
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ssize_t sz = 0;
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int i;
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for (i = 0; i < geo->all_luns; i++) {
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int active = 1;
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rlun = &pblk->luns[i];
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if (!down_trylock(&rlun->wr_sem)) {
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active = 0;
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up(&rlun->wr_sem);
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}
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"pblk: pos:%d, ch:%d, lun:%d - %d\n",
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i,
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rlun->bppa.a.ch,
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rlun->bppa.a.lun,
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active);
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}
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return sz;
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}
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static ssize_t pblk_sysfs_rate_limiter(struct pblk *pblk, char *page)
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{
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int free_blocks, free_user_blocks, total_blocks;
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int rb_user_max, rb_user_cnt;
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int rb_gc_max, rb_gc_cnt, rb_budget, rb_state;
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free_blocks = pblk_rl_nr_free_blks(&pblk->rl);
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free_user_blocks = pblk_rl_nr_user_free_blks(&pblk->rl);
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rb_user_max = pblk->rl.rb_user_max;
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rb_user_cnt = atomic_read(&pblk->rl.rb_user_cnt);
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rb_gc_max = pblk->rl.rb_gc_max;
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rb_gc_cnt = atomic_read(&pblk->rl.rb_gc_cnt);
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rb_budget = pblk->rl.rb_budget;
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rb_state = pblk->rl.rb_state;
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total_blocks = pblk->rl.total_blocks;
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return snprintf(page, PAGE_SIZE,
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"u:%u/%u,gc:%u/%u(%u)(stop:<%u,full:>%u,free:%d/%d/%d)-%d\n",
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rb_user_cnt,
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rb_user_max,
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rb_gc_cnt,
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rb_gc_max,
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rb_state,
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rb_budget,
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pblk->rl.high,
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free_blocks,
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free_user_blocks,
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total_blocks,
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READ_ONCE(pblk->rl.rb_user_active));
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}
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static ssize_t pblk_sysfs_gc_state_show(struct pblk *pblk, char *page)
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{
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int gc_enabled, gc_active;
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pblk_gc_sysfs_state_show(pblk, &gc_enabled, &gc_active);
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return snprintf(page, PAGE_SIZE, "gc_enabled=%d, gc_active=%d\n",
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gc_enabled, gc_active);
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}
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static ssize_t pblk_sysfs_stats(struct pblk *pblk, char *page)
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{
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ssize_t sz;
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sz = snprintf(page, PAGE_SIZE,
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"read_failed=%lu, read_high_ecc=%lu, read_empty=%lu, read_failed_gc=%lu, write_failed=%lu, erase_failed=%lu\n",
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atomic_long_read(&pblk->read_failed),
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atomic_long_read(&pblk->read_high_ecc),
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atomic_long_read(&pblk->read_empty),
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atomic_long_read(&pblk->read_failed_gc),
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atomic_long_read(&pblk->write_failed),
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atomic_long_read(&pblk->erase_failed));
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return sz;
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}
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static ssize_t pblk_sysfs_write_buffer(struct pblk *pblk, char *page)
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{
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return pblk_rb_sysfs(&pblk->rwb, page);
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}
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static ssize_t pblk_sysfs_ppaf(struct pblk *pblk, char *page)
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{
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struct nvm_tgt_dev *dev = pblk->dev;
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struct nvm_geo *geo = &dev->geo;
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ssize_t sz = 0;
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if (geo->version == NVM_OCSSD_SPEC_12) {
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struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
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struct nvm_addrf_12 *gppaf = (struct nvm_addrf_12 *)&geo->addrf;
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sz = snprintf(page, PAGE_SIZE,
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"g:(b:%d)blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
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pblk->addrf_len,
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ppaf->blk_offset, ppaf->blk_len,
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ppaf->pg_offset, ppaf->pg_len,
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ppaf->lun_offset, ppaf->lun_len,
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ppaf->ch_offset, ppaf->ch_len,
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ppaf->pln_offset, ppaf->pln_len,
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ppaf->sec_offset, ppaf->sec_len);
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"d:blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
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gppaf->blk_offset, gppaf->blk_len,
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gppaf->pg_offset, gppaf->pg_len,
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gppaf->lun_offset, gppaf->lun_len,
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gppaf->ch_offset, gppaf->ch_len,
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gppaf->pln_offset, gppaf->pln_len,
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gppaf->sec_offset, gppaf->sec_len);
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} else {
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struct nvm_addrf *ppaf = &pblk->addrf;
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struct nvm_addrf *gppaf = &geo->addrf;
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sz = snprintf(page, PAGE_SIZE,
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"pblk:(s:%d)ch:%d/%d,lun:%d/%d,chk:%d/%d/sec:%d/%d\n",
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pblk->addrf_len,
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ppaf->ch_offset, ppaf->ch_len,
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ppaf->lun_offset, ppaf->lun_len,
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ppaf->chk_offset, ppaf->chk_len,
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ppaf->sec_offset, ppaf->sec_len);
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"device:ch:%d/%d,lun:%d/%d,chk:%d/%d,sec:%d/%d\n",
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gppaf->ch_offset, gppaf->ch_len,
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gppaf->lun_offset, gppaf->lun_len,
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gppaf->chk_offset, gppaf->chk_len,
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gppaf->sec_offset, gppaf->sec_len);
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}
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return sz;
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}
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static ssize_t pblk_sysfs_lines(struct pblk *pblk, char *page)
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{
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struct nvm_tgt_dev *dev = pblk->dev;
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struct nvm_geo *geo = &dev->geo;
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struct pblk_line_meta *lm = &pblk->lm;
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struct pblk_line_mgmt *l_mg = &pblk->l_mg;
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struct pblk_line *line;
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ssize_t sz = 0;
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int nr_free_lines;
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int cur_data, cur_log;
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int free_line_cnt = 0, closed_line_cnt = 0, emeta_line_cnt = 0;
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int d_line_cnt = 0, l_line_cnt = 0;
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int gc_full = 0, gc_high = 0, gc_mid = 0, gc_low = 0, gc_empty = 0;
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int bad = 0, cor = 0;
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int msecs = 0, cur_sec = 0, vsc = 0, sec_in_line = 0;
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int map_weight = 0, meta_weight = 0;
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spin_lock(&l_mg->free_lock);
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cur_data = (l_mg->data_line) ? l_mg->data_line->id : -1;
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cur_log = (l_mg->log_line) ? l_mg->log_line->id : -1;
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nr_free_lines = l_mg->nr_free_lines;
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list_for_each_entry(line, &l_mg->free_list, list)
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free_line_cnt++;
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spin_unlock(&l_mg->free_lock);
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spin_lock(&l_mg->close_lock);
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list_for_each_entry(line, &l_mg->emeta_list, list)
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emeta_line_cnt++;
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spin_unlock(&l_mg->close_lock);
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spin_lock(&l_mg->gc_lock);
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list_for_each_entry(line, &l_mg->gc_full_list, list) {
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if (line->type == PBLK_LINETYPE_DATA)
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d_line_cnt++;
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else if (line->type == PBLK_LINETYPE_LOG)
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l_line_cnt++;
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closed_line_cnt++;
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gc_full++;
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}
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list_for_each_entry(line, &l_mg->gc_high_list, list) {
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if (line->type == PBLK_LINETYPE_DATA)
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d_line_cnt++;
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else if (line->type == PBLK_LINETYPE_LOG)
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l_line_cnt++;
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closed_line_cnt++;
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gc_high++;
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}
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list_for_each_entry(line, &l_mg->gc_mid_list, list) {
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if (line->type == PBLK_LINETYPE_DATA)
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d_line_cnt++;
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else if (line->type == PBLK_LINETYPE_LOG)
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l_line_cnt++;
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closed_line_cnt++;
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gc_mid++;
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}
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list_for_each_entry(line, &l_mg->gc_low_list, list) {
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if (line->type == PBLK_LINETYPE_DATA)
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d_line_cnt++;
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else if (line->type == PBLK_LINETYPE_LOG)
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l_line_cnt++;
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closed_line_cnt++;
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gc_low++;
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}
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list_for_each_entry(line, &l_mg->gc_empty_list, list) {
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if (line->type == PBLK_LINETYPE_DATA)
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d_line_cnt++;
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else if (line->type == PBLK_LINETYPE_LOG)
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l_line_cnt++;
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closed_line_cnt++;
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gc_empty++;
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}
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list_for_each_entry(line, &l_mg->bad_list, list)
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bad++;
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list_for_each_entry(line, &l_mg->corrupt_list, list)
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cor++;
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spin_unlock(&l_mg->gc_lock);
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spin_lock(&l_mg->free_lock);
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if (l_mg->data_line) {
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cur_sec = l_mg->data_line->cur_sec;
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msecs = l_mg->data_line->left_msecs;
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vsc = le32_to_cpu(*l_mg->data_line->vsc);
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sec_in_line = l_mg->data_line->sec_in_line;
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meta_weight = bitmap_weight(&l_mg->meta_bitmap,
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PBLK_DATA_LINES);
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map_weight = bitmap_weight(l_mg->data_line->map_bitmap,
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lm->sec_per_line);
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}
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spin_unlock(&l_mg->free_lock);
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if (nr_free_lines != free_line_cnt)
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pr_err("pblk: corrupted free line list:%d/%d\n",
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nr_free_lines, free_line_cnt);
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sz = snprintf(page, PAGE_SIZE - sz,
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"line: nluns:%d, nblks:%d, nsecs:%d\n",
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geo->all_luns, lm->blk_per_line, lm->sec_per_line);
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"lines:d:%d,l:%d-f:%d,m:%d/%d,c:%d,b:%d,co:%d(d:%d,l:%d)t:%d\n",
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cur_data, cur_log,
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nr_free_lines,
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emeta_line_cnt, meta_weight,
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closed_line_cnt,
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bad, cor,
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d_line_cnt, l_line_cnt,
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l_mg->nr_lines);
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"GC: full:%d, high:%d, mid:%d, low:%d, empty:%d, queue:%d\n",
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gc_full, gc_high, gc_mid, gc_low, gc_empty,
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atomic_read(&pblk->gc.read_inflight_gc));
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"data (%d) cur:%d, left:%d, vsc:%d, s:%d, map:%d/%d (%d)\n",
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cur_data, cur_sec, msecs, vsc, sec_in_line,
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map_weight, lm->sec_per_line,
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atomic_read(&pblk->inflight_io));
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return sz;
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}
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static ssize_t pblk_sysfs_lines_info(struct pblk *pblk, char *page)
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{
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struct nvm_tgt_dev *dev = pblk->dev;
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struct nvm_geo *geo = &dev->geo;
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struct pblk_line_meta *lm = &pblk->lm;
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ssize_t sz = 0;
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sz = snprintf(page, PAGE_SIZE - sz,
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"smeta - len:%d, secs:%d\n",
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lm->smeta_len, lm->smeta_sec);
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"emeta - len:%d, sec:%d, bb_start:%d\n",
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lm->emeta_len[0], lm->emeta_sec[0],
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lm->emeta_bb);
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"bitmap lengths: sec:%d, blk:%d, lun:%d\n",
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lm->sec_bitmap_len,
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lm->blk_bitmap_len,
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lm->lun_bitmap_len);
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"blk_line:%d, sec_line:%d, sec_blk:%d\n",
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lm->blk_per_line,
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lm->sec_per_line,
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geo->clba);
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return sz;
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}
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static ssize_t pblk_sysfs_get_sec_per_write(struct pblk *pblk, char *page)
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{
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return snprintf(page, PAGE_SIZE, "%d\n", pblk->sec_per_write);
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}
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static ssize_t pblk_get_write_amp(u64 user, u64 gc, u64 pad,
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char *page)
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{
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int sz;
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sz = snprintf(page, PAGE_SIZE,
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"user:%lld gc:%lld pad:%lld WA:",
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user, gc, pad);
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if (!user) {
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sz += snprintf(page + sz, PAGE_SIZE - sz, "NaN\n");
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} else {
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u64 wa_int;
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u32 wa_frac;
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wa_int = (user + gc + pad) * 100000;
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wa_int = div_u64(wa_int, user);
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wa_int = div_u64_rem(wa_int, 100000, &wa_frac);
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sz += snprintf(page + sz, PAGE_SIZE - sz, "%llu.%05u\n",
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wa_int, wa_frac);
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}
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return sz;
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}
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static ssize_t pblk_sysfs_get_write_amp_mileage(struct pblk *pblk, char *page)
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{
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return pblk_get_write_amp(atomic64_read(&pblk->user_wa),
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atomic64_read(&pblk->gc_wa), atomic64_read(&pblk->pad_wa),
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page);
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}
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static ssize_t pblk_sysfs_get_write_amp_trip(struct pblk *pblk, char *page)
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{
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return pblk_get_write_amp(
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atomic64_read(&pblk->user_wa) - pblk->user_rst_wa,
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atomic64_read(&pblk->gc_wa) - pblk->gc_rst_wa,
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atomic64_read(&pblk->pad_wa) - pblk->pad_rst_wa, page);
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}
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static long long bucket_percentage(unsigned long long bucket,
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unsigned long long total)
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{
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int p = bucket * 100;
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p = div_u64(p, total);
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return p;
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}
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static ssize_t pblk_sysfs_get_padding_dist(struct pblk *pblk, char *page)
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{
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int sz = 0;
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unsigned long long total;
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unsigned long long total_buckets = 0;
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int buckets = pblk->min_write_pgs - 1;
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int i;
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total = atomic64_read(&pblk->nr_flush) - pblk->nr_flush_rst;
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if (!total) {
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for (i = 0; i < (buckets + 1); i++)
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sz += snprintf(page + sz, PAGE_SIZE - sz,
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"%d:0 ", i);
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sz += snprintf(page + sz, PAGE_SIZE - sz, "\n");
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return sz;
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}
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for (i = 0; i < buckets; i++)
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total_buckets += atomic64_read(&pblk->pad_dist[i]);
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sz += snprintf(page + sz, PAGE_SIZE - sz, "0:%lld%% ",
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bucket_percentage(total - total_buckets, total));
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for (i = 0; i < buckets; i++) {
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unsigned long long p;
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p = bucket_percentage(atomic64_read(&pblk->pad_dist[i]),
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total);
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sz += snprintf(page + sz, PAGE_SIZE - sz, "%d:%lld%% ",
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i + 1, p);
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}
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sz += snprintf(page + sz, PAGE_SIZE - sz, "\n");
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return sz;
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}
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#ifdef CONFIG_NVM_DEBUG
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static ssize_t pblk_sysfs_stats_debug(struct pblk *pblk, char *page)
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{
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return snprintf(page, PAGE_SIZE,
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"%lu\t%lu\t%ld\t%llu\t%ld\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\n",
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atomic_long_read(&pblk->inflight_writes),
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atomic_long_read(&pblk->inflight_reads),
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atomic_long_read(&pblk->req_writes),
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(u64)atomic64_read(&pblk->nr_flush),
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atomic_long_read(&pblk->padded_writes),
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atomic_long_read(&pblk->padded_wb),
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atomic_long_read(&pblk->sub_writes),
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atomic_long_read(&pblk->sync_writes),
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atomic_long_read(&pblk->recov_writes),
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atomic_long_read(&pblk->recov_gc_writes),
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atomic_long_read(&pblk->recov_gc_reads),
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atomic_long_read(&pblk->cache_reads),
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atomic_long_read(&pblk->sync_reads));
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}
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#endif
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static ssize_t pblk_sysfs_gc_force(struct pblk *pblk, const char *page,
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size_t len)
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{
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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 ssize_t pblk_sysfs_set_write_amp_trip(struct pblk *pblk,
|
|
const char *page, size_t len)
|
|
{
|
|
size_t c_len;
|
|
int reset_value;
|
|
|
|
c_len = strcspn(page, "\n");
|
|
if (c_len >= len)
|
|
return -EINVAL;
|
|
|
|
if (kstrtouint(page, 0, &reset_value))
|
|
return -EINVAL;
|
|
|
|
if (reset_value != 0)
|
|
return -EINVAL;
|
|
|
|
pblk->user_rst_wa = atomic64_read(&pblk->user_wa);
|
|
pblk->pad_rst_wa = atomic64_read(&pblk->pad_wa);
|
|
pblk->gc_rst_wa = atomic64_read(&pblk->gc_wa);
|
|
|
|
return len;
|
|
}
|
|
|
|
|
|
static ssize_t pblk_sysfs_set_padding_dist(struct pblk *pblk,
|
|
const char *page, size_t len)
|
|
{
|
|
size_t c_len;
|
|
int reset_value;
|
|
int buckets = pblk->min_write_pgs - 1;
|
|
int i;
|
|
|
|
c_len = strcspn(page, "\n");
|
|
if (c_len >= len)
|
|
return -EINVAL;
|
|
|
|
if (kstrtouint(page, 0, &reset_value))
|
|
return -EINVAL;
|
|
|
|
if (reset_value != 0)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < buckets; i++)
|
|
atomic64_set(&pblk->pad_dist[i], 0);
|
|
|
|
pblk->nr_flush_rst = atomic64_read(&pblk->nr_flush);
|
|
|
|
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,
|
|
};
|
|
|
|
static struct attribute sys_write_amp_mileage = {
|
|
.name = "write_amp_mileage",
|
|
.mode = 0444,
|
|
};
|
|
|
|
static struct attribute sys_write_amp_trip = {
|
|
.name = "write_amp_trip",
|
|
.mode = 0644,
|
|
};
|
|
|
|
static struct attribute sys_padding_dist = {
|
|
.name = "padding_dist",
|
|
.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,
|
|
&sys_write_amp_mileage,
|
|
&sys_write_amp_trip,
|
|
&sys_padding_dist,
|
|
#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);
|
|
else if (strcmp(attr->name, "write_amp_mileage") == 0)
|
|
return pblk_sysfs_get_write_amp_mileage(pblk, buf);
|
|
else if (strcmp(attr->name, "write_amp_trip") == 0)
|
|
return pblk_sysfs_get_write_amp_trip(pblk, buf);
|
|
else if (strcmp(attr->name, "padding_dist") == 0)
|
|
return pblk_sysfs_get_padding_dist(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);
|
|
else if (strcmp(attr->name, "write_amp_trip") == 0)
|
|
return pblk_sysfs_set_write_amp_trip(pblk, buf, len);
|
|
else if (strcmp(attr->name, "padding_dist") == 0)
|
|
return pblk_sysfs_set_padding_dist(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);
|
|
}
|