linux-kernel - [PATCH v2 10/11] block/badblocks: factor out a helper to create badblocks

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Message-Id: <20230504124828.679770-11-linan666@huaweicloud.com>
Date:   Thu,  4 May 2023 20:48:27 +0800
From:   linan666@...weicloud.com
To:     axboe@...nel.dk, linan122@...wei.com, vishal.l.verma@...el.com,
        dan.j.williams@...el.com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        yukuai3@...wei.com, yi.zhang@...wei.com, houtao1@...wei.com,
        yangerkun@...wei.com
Subject: [PATCH v2 10/11] block/badblocks: factor out a helper to create badblocks

From: Li Nan <linan122@...wei.com>

Add a helper badblocks_create() to create badblocks, it makes code more
readable. No functional change.

Signed-off-by: Li Nan <linan122@...wei.com>
---
 block/badblocks.c | 65 ++++++++++++++++++++++++++++++-----------------
 1 file changed, 41 insertions(+), 24 deletions(-)

diff --git a/block/badblocks.c b/block/badblocks.c
index c87c68d4bcac..bb0324b66f57 100644
--- a/block/badblocks.c
+++ b/block/badblocks.c
@@ -263,6 +263,46 @@ static void badblocks_combine(struct badblocks *bb, int lo)
 	}
 }
 
+/*
+ * creat new badblocks if it can't merge with existing region
+ *
+ * Return:
+ *  0: success
+ *  1: failed to set badblocks (out of space)
+ */
+static int badblocks_create(struct badblocks *bb, sector_t s, sector_t sectors,
+			int hi, int acknowledged, bool *changed)
+{
+	u64 *p = bb->page;
+	int rv = 0;
+
+	while (sectors) {
+		int this_sectors = sectors;
+
+		/* didn't merge (it all).
+		 * Need to add a range just before 'hi'
+		 */
+		if (bb->count >= MAX_BADBLOCKS) {
+			/* No room for more */
+			rv = 1;
+			break;
+		}
+
+		memmove(p + hi + 1, p + hi,
+			(bb->count - hi) * 8);
+		bb->count++;
+
+		if (this_sectors > BB_MAX_LEN)
+			this_sectors = BB_MAX_LEN;
+		p[hi] = BB_MAKE(s, this_sectors, acknowledged);
+		sectors -= this_sectors;
+		s += this_sectors;
+		hi++;
+		*changed = true;
+	}
+	return rv;
+}
+
 /**
  * badblocks_set() - Add a range of bad blocks to the table.
  * @bb:		the badblocks structure that holds all badblock information
@@ -327,30 +367,7 @@ int badblocks_set(struct badblocks *bb, sector_t s, int sectors,
 		if (sectors == 0)
 			badblocks_combine(bb, lo);
 	}
-	while (sectors) {
-		/* didn't merge (it all).
-		 * Need to add a range just before 'hi'
-		 */
-		if (bb->count >= MAX_BADBLOCKS) {
-			/* No room for more */
-			rv = 1;
-			break;
-		} else {
-			int this_sectors = sectors;
-
-			memmove(p + hi + 1, p + hi,
-				(bb->count - hi) * 8);
-			bb->count++;
-
-			if (this_sectors > BB_MAX_LEN)
-				this_sectors = BB_MAX_LEN;
-			p[hi] = BB_MAKE(s, this_sectors, acknowledged);
-			sectors -= this_sectors;
-			s += this_sectors;
-			hi++;
-			changed = true;
-		}
-	}
+	rv = badblocks_create(bb, s, sectors, hi, acknowledged, &changed);
 
 	if (changed) {
 		bb->changed = changed;
-- 
2.31.1