linux-kernel - [PATCH v7 03/12] ext4: call ext4_mb_mark_context in ext4_free_blocks

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: <20230919201532.310085-4-shikemeng@huaweicloud.com>
Date:   Wed, 20 Sep 2023 04:15:23 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     tytso@....edu, adilger.kernel@...ger.ca, ritesh.list@...il.com
Cc:     ojaswin@...ux.ibm.com, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v7 03/12] ext4: call ext4_mb_mark_context in ext4_free_blocks_simple

call ext4_mb_mark_context in ext4_free_blocks_simple to:
1. remove repeat code
2. pair update of free_clusters in ext4_mb_new_blocks_simple.
3. add missing ext4_lock_group/ext4_unlock_group protection.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 fs/ext4/mballoc.c | 33 +--------------------------------
 1 file changed, 1 insertion(+), 32 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index e1320eea46e9..cd2fd5dbfcdd 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -6393,43 +6393,12 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
 static void ext4_free_blocks_simple(struct inode *inode, ext4_fsblk_t block,
 					unsigned long count)
 {
-	struct buffer_head *bitmap_bh;
 	struct super_block *sb = inode->i_sb;
-	struct ext4_group_desc *gdp;
-	struct buffer_head *gdp_bh;
 	ext4_group_t group;
 	ext4_grpblk_t blkoff;
-	int already_freed = 0, err, i;
 
 	ext4_get_group_no_and_offset(sb, block, &group, &blkoff);
-	bitmap_bh = ext4_read_block_bitmap(sb, group);
-	if (IS_ERR(bitmap_bh)) {
-		pr_warn("Failed to read block bitmap\n");
-		return;
-	}
-	gdp = ext4_get_group_desc(sb, group, &gdp_bh);
-	if (!gdp)
-		goto err_out;
-
-	for (i = 0; i < count; i++) {
-		if (!mb_test_bit(blkoff + i, bitmap_bh->b_data))
-			already_freed++;
-	}
-	mb_clear_bits(bitmap_bh->b_data, blkoff, count);
-	err = ext4_handle_dirty_metadata(NULL, NULL, bitmap_bh);
-	if (err)
-		goto err_out;
-	ext4_free_group_clusters_set(
-		sb, gdp, ext4_free_group_clusters(sb, gdp) +
-		count - already_freed);
-	ext4_block_bitmap_csum_set(sb, gdp, bitmap_bh);
-	ext4_group_desc_csum_set(sb, group, gdp);
-	ext4_handle_dirty_metadata(NULL, NULL, gdp_bh);
-	sync_dirty_buffer(bitmap_bh);
-	sync_dirty_buffer(gdp_bh);
-
-err_out:
-	brelse(bitmap_bh);
+	ext4_mb_mark_context(sb, false, group, blkoff, count);
 }
 
 /**
-- 
2.30.0