linux-kernel - [GIT PULL 20/25] lightnvm: pblk: do not log recovery read errors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180105131621.20808-21-m@bjorling.me>
Date:   Fri,  5 Jan 2018 14:16:16 +0100
From:   Matias Bjørling <m@...rling.me>
To:     axboe@...com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Javier González <javier@...xlabs.com>,
        Matias Bjørling <m@...rling.me>
Subject: [GIT PULL 20/25] lightnvm: pblk: do not log recovery read errors

From: Javier González <javier@...xlabs.com>

On scan recovery, reads can fail. This happens because the first page
for each line is read in order to determined if the line has been used
(and thus needs to be recovered), or not. This can lead to "empty page"
read errors.

Since these errors are normal, do not log them, as they are confusing
when reviewing the logs.

Signed-off-by: Javier González <javier@...xlabs.com>
Signed-off-by: Matias Bjørling <m@...rling.me>
---
 drivers/lightnvm/pblk-core.c | 6 +++---
 drivers/lightnvm/pblk.h      | 1 +
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 5ec7ad6..0487b93 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -742,7 +742,7 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
 		cmd_op = NVM_OP_PWRITE;
 		flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
 		lba_list = emeta_to_lbas(pblk, line->emeta->buf);
-	} else if (dir == PBLK_READ) {
+	} else if (dir == PBLK_READ_RECOV || dir == PBLK_READ) {
 		bio_op = REQ_OP_READ;
 		cmd_op = NVM_OP_PREAD;
 		flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
@@ -802,7 +802,7 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
 	if (rqd.error) {
 		if (dir == PBLK_WRITE)
 			pblk_log_write_err(pblk, &rqd);
-		else
+		else if (dir == PBLK_READ)
 			pblk_log_read_err(pblk, &rqd);
 	}
 
@@ -816,7 +816,7 @@ int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line)
 {
 	u64 bpaddr = pblk_line_smeta_start(pblk, line);
 
-	return pblk_line_submit_smeta_io(pblk, line, bpaddr, PBLK_READ);
+	return pblk_line_submit_smeta_io(pblk, line, bpaddr, PBLK_READ_RECOV);
 }
 
 int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line,
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index 19e622c..93ec4fd 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -60,6 +60,7 @@ enum {
 	PBLK_READ		= READ,
 	PBLK_WRITE		= WRITE,/* Write from write buffer */
 	PBLK_WRITE_INT,			/* Internal write - no write buffer */
+	PBLK_READ_RECOV,		/* Recovery read - errors allowed */
 	PBLK_ERASE,
 };
 
-- 
2.9.3