add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/lightnvm/pblk-sysfs.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * Copyright (C) 2016 CNEX Labs
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  * Initial release: Javier Gonzalez <javier@cnexlabs.com>
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@@ -36,7 +37,7 @@
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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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+		sz += scnprintf(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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@@ -119,7 +120,7 @@
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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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+		sz = scnprintf(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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@@ -129,7 +130,7 @@
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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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+		sz += scnprintf(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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@@ -141,7 +142,7 @@
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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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+		sz = scnprintf(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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@@ -149,7 +150,7 @@
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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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+		sz += scnprintf(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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@@ -277,11 +278,11 @@
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 		pblk_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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+	sz = scnprintf(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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+	sz += scnprintf(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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@@ -291,12 +292,12 @@
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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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+	sz += scnprintf(page + sz, PAGE_SIZE - sz,
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 		"GC: full:%d, high:%d, mid:%d, low:%d, empty:%d, werr: %d, queue:%d\n",
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 			gc_full, gc_high, gc_mid, gc_low, gc_empty, gc_werr,
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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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+	sz += scnprintf(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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@@ -312,19 +313,19 @@
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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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+	sz = scnprintf(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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+	sz += scnprintf(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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+	sz += scnprintf(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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+	sz += scnprintf(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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@@ -343,12 +344,12 @@
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 {
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 	int sz;
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-	sz = snprintf(page, PAGE_SIZE,
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+	sz = scnprintf(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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+		sz += scnprintf(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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@@ -357,7 +358,7 @@
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 		wa_int = div64_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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+		sz += scnprintf(page + sz, PAGE_SIZE - sz, "%llu.%05u\n",
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 							wa_int, wa_frac);
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 	}
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@@ -400,9 +401,9 @@
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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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+			sz += scnprintf(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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+		sz += scnprintf(page + sz, PAGE_SIZE - sz, "\n");
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 		return sz;
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 	}
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@@ -410,7 +411,7 @@
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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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+	sz += scnprintf(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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@@ -418,10 +419,10 @@
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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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+		sz += scnprintf(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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+	sz += scnprintf(page + sz, PAGE_SIZE - sz, "\n");
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 	return sz;
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 }
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@@ -478,6 +479,13 @@
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 	if (kstrtouint(page, 0, &sec_per_write))
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 		return -EINVAL;
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+	if (!pblk_is_oob_meta_supported(pblk)) {
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+		/* For packed metadata case it is
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+		 * not allowed to change sec_per_write.
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+		 */
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+		return -EINVAL;
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+	}
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+
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 	if (sec_per_write < pblk->min_write_pgs
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 				|| sec_per_write > pblk->max_write_pgs
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 				|| sec_per_write % pblk->min_write_pgs != 0)