linux-kernel - [GIT PULL 22/26] lightnvm: pblk: recover only written metadata

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Message-Id: <20190504183811.18725-23-mb@lightnvm.io>
Date:   Sat,  4 May 2019 20:38:07 +0200
From:   Matias Bjørling <mb@...htnvm.io>
To:     axboe@...com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Igor Konopko <igor.j.konopko@...el.com>,
        Matias Bjørling <mb@...htnvm.io>
Subject: [GIT PULL 22/26] lightnvm: pblk: recover only written metadata

From: Igor Konopko <igor.j.konopko@...el.com>

This patch ensures that smeta was fully written before even
trying to read it based on chunk table state and write pointer.

Signed-off-by: Igor Konopko <igor.j.konopko@...el.com>
Signed-off-by: Matias Bjørling <mb@...htnvm.io>
---
 drivers/lightnvm/pblk-recovery.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
index 865fe310cab4..a9085b0e6611 100644
--- a/drivers/lightnvm/pblk-recovery.c
+++ b/drivers/lightnvm/pblk-recovery.c
@@ -655,10 +655,12 @@ static int pblk_line_was_written(struct pblk_line *line,
 	bppa = pblk->luns[smeta_blk].bppa;
 	chunk = &line->chks[pblk_ppa_to_pos(geo, bppa)];
 
-	if (chunk->state & NVM_CHK_ST_FREE)
-		return 0;
+	if (chunk->state & NVM_CHK_ST_CLOSED ||
+	    (chunk->state & NVM_CHK_ST_OPEN
+	     && chunk->wp >= lm->smeta_sec))
+		return 1;
 
-	return 1;
+	return 0;
 }
 
 static bool pblk_line_is_open(struct pblk *pblk, struct pblk_line *line)
-- 
2.19.1