v4.19.13 snapshot.
diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c
new file mode 100644
index 0000000..8d2ed51
--- /dev/null
+++ b/drivers/lightnvm/pblk-sysfs.c
@@ -0,0 +1,721 @@
+/*
+ * 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->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 = div_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);
+}