From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- drivers/lightnvm/pblk-sysfs.c | 720 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 720 insertions(+) create mode 100644 drivers/lightnvm/pblk-sysfs.c (limited to 'drivers/lightnvm/pblk-sysfs.c') diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c new file mode 100644 index 000000000..bdc86ee4c --- /dev/null +++ b/drivers/lightnvm/pblk-sysfs.c @@ -0,0 +1,720 @@ +/* + * Copyright (C) 2016 CNEX Labs + * Initial release: Javier Gonzalez + * Matias Bjorling + * + * 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->all_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.a.ch, + rlun->bppa.a.lun, + active); + } + + return sz; +} + +static ssize_t pblk_sysfs_rate_limiter(struct pblk *pblk, char *page) +{ + int free_blocks, free_user_blocks, total_blocks; + int rb_user_max, rb_user_cnt; + int rb_gc_max, rb_gc_cnt, rb_budget, rb_state; + + free_blocks = pblk_rl_nr_free_blks(&pblk->rl); + free_user_blocks = pblk_rl_nr_user_free_blks(&pblk->rl); + 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)(stop:<%u,full:>%u,free:%d/%d/%d)-%d\n", + rb_user_cnt, + rb_user_max, + rb_gc_cnt, + rb_gc_max, + rb_state, + rb_budget, + pblk->rl.high, + free_blocks, + free_user_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; + + if (geo->version == NVM_OCSSD_SPEC_12) { + struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf; + struct nvm_addrf_12 *gppaf = (struct nvm_addrf_12 *)&geo->addrf; + + sz = snprintf(page, PAGE_SIZE, + "g:(b:%d)blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n", + pblk->addrf_len, + ppaf->blk_offset, ppaf->blk_len, + ppaf->pg_offset, ppaf->pg_len, + ppaf->lun_offset, ppaf->lun_len, + ppaf->ch_offset, ppaf->ch_len, + ppaf->pln_offset, ppaf->pln_len, + ppaf->sec_offset, ppaf->sec_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", + gppaf->blk_offset, gppaf->blk_len, + gppaf->pg_offset, gppaf->pg_len, + gppaf->lun_offset, gppaf->lun_len, + gppaf->ch_offset, gppaf->ch_len, + gppaf->pln_offset, gppaf->pln_len, + gppaf->sec_offset, gppaf->sec_len); + } else { + struct nvm_addrf *ppaf = &pblk->addrf; + struct nvm_addrf *gppaf = &geo->addrf; + + sz = snprintf(page, PAGE_SIZE, + "pblk:(s:%d)ch:%d/%d,lun:%d/%d,chk:%d/%d/sec:%d/%d\n", + pblk->addrf_len, + ppaf->ch_offset, ppaf->ch_len, + ppaf->lun_offset, ppaf->lun_len, + ppaf->chk_offset, ppaf->chk_len, + ppaf->sec_offset, ppaf->sec_len); + + sz += snprintf(page + sz, PAGE_SIZE - sz, + "device:ch:%d/%d,lun:%d/%d,chk:%d/%d,sec:%d/%d\n", + gppaf->ch_offset, gppaf->ch_len, + gppaf->lun_offset, gppaf->lun_len, + gppaf->chk_offset, gppaf->chk_len, + gppaf->sec_offset, gppaf->sec_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 gc_werr = 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->gc_werr_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_werr++; + } + + 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); + + spin_lock(&l_mg->data_line->lock); + if (l_mg->data_line->map_bitmap) + map_weight = bitmap_weight(l_mg->data_line->map_bitmap, + lm->sec_per_line); + else + map_weight = 0; + spin_unlock(&l_mg->data_line->lock); + } + spin_unlock(&l_mg->free_lock); + + if (nr_free_lines != free_line_cnt) + pblk_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->all_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, werr: %d, queue:%d\n", + gc_full, gc_high, gc_mid, gc_low, gc_empty, gc_werr, + 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->clba); + + 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); +} + +static ssize_t pblk_get_write_amp(u64 user, u64 gc, u64 pad, + char *page) +{ + int sz; + + sz = snprintf(page, PAGE_SIZE, + "user:%lld gc:%lld pad:%lld WA:", + user, gc, pad); + + if (!user) { + sz += snprintf(page + sz, PAGE_SIZE - sz, "NaN\n"); + } else { + u64 wa_int; + u32 wa_frac; + + wa_int = (user + gc + pad) * 100000; + wa_int = div64_u64(wa_int, user); + wa_int = div_u64_rem(wa_int, 100000, &wa_frac); + + sz += snprintf(page + sz, PAGE_SIZE - sz, "%llu.%05u\n", + wa_int, wa_frac); + } + + return sz; +} + +static ssize_t pblk_sysfs_get_write_amp_mileage(struct pblk *pblk, char *page) +{ + return pblk_get_write_amp(atomic64_read(&pblk->user_wa), + atomic64_read(&pblk->gc_wa), atomic64_read(&pblk->pad_wa), + page); +} + +static ssize_t pblk_sysfs_get_write_amp_trip(struct pblk *pblk, char *page) +{ + return pblk_get_write_amp( + atomic64_read(&pblk->user_wa) - pblk->user_rst_wa, + atomic64_read(&pblk->gc_wa) - pblk->gc_rst_wa, + atomic64_read(&pblk->pad_wa) - pblk->pad_rst_wa, page); +} + +static long long bucket_percentage(unsigned long long bucket, + unsigned long long total) +{ + int p = bucket * 100; + + p = div_u64(p, total); + + return p; +} + +static ssize_t pblk_sysfs_get_padding_dist(struct pblk *pblk, char *page) +{ + int sz = 0; + unsigned long long total; + unsigned long long total_buckets = 0; + int buckets = pblk->min_write_pgs - 1; + int i; + + total = atomic64_read(&pblk->nr_flush) - pblk->nr_flush_rst; + if (!total) { + for (i = 0; i < (buckets + 1); i++) + sz += snprintf(page + sz, PAGE_SIZE - sz, + "%d:0 ", i); + sz += snprintf(page + sz, PAGE_SIZE - sz, "\n"); + + return sz; + } + + for (i = 0; i < buckets; i++) + total_buckets += atomic64_read(&pblk->pad_dist[i]); + + sz += snprintf(page + sz, PAGE_SIZE - sz, "0:%lld%% ", + bucket_percentage(total - total_buckets, total)); + + for (i = 0; i < buckets; i++) { + unsigned long long p; + + p = bucket_percentage(atomic64_read(&pblk->pad_dist[i]), + total); + sz += snprintf(page + sz, PAGE_SIZE - sz, "%d:%lld%% ", + i + 1, p); + } + sz += snprintf(page + sz, PAGE_SIZE - sz, "\n"); + + return sz; +} + +#ifdef CONFIG_NVM_PBLK_DEBUG +static ssize_t pblk_sysfs_stats_debug(struct pblk *pblk, char *page) +{ + return snprintf(page, PAGE_SIZE, + "%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", + atomic_long_read(&pblk->inflight_writes), + atomic_long_read(&pblk->inflight_reads), + atomic_long_read(&pblk->req_writes), + (u64)atomic64_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 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_PBLK_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_PBLK_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_PBLK_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) { + pblk_err(pblk, "could not register\n"); + 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); +} -- cgit v1.2.3