linux-kernel - [PATCH v2 1/2] f2fs: Add a method for calculating the remaining blocks in the current segment in LFS mode.

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-next>] [day] [month] [year] [list]

Message-ID: <20250502044146.552-1-yohan.joung@sk.com>
Date: Fri,  2 May 2025 13:41:44 +0900
From: "yohan.joung" <yohan.joung@...com>
To: jaegeuk@...nel.org,
	chao@...nel.org,
	daehojeong@...gle.com
Cc: linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	pilhyun.kim@...com,
	"yohan.joung" <yohan.joung@...com>
Subject: [PATCH v2 1/2] f2fs: Add a method for calculating the remaining blocks in the current segment in LFS mode.

In LFS mode, the previous segment cannot use invalid blocks,
so the remaining blocks from the next_blkoff of the current segment
to the end of the section are calculated.

Signed-off-by: yohan.joung <yohan.joung@...com>
---
 fs/f2fs/segment.h | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 03c0f59be5a8..345da052f0e1 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -582,8 +582,14 @@ static inline bool has_curseg_enough_space(struct f2fs_sb_info *sbi,
 		if (unlikely(segno == NULL_SEGNO))
 			return false;
 
-		left_blocks = CAP_BLKS_PER_SEC(sbi) -
-				get_ckpt_valid_blocks(sbi, segno, true);
+		if (f2fs_lfs_mode(sbi)) {
+			left_blocks = CAP_BLKS_PER_SEC(sbi) -
+				(segno - rounddown(segno, SEGS_PER_SEC(sbi))) * BLKS_PER_SEG(sbi) -
+				CURSEG_I(sbi, i)->next_blkoff;
+		} else {
+			left_blocks = CAP_BLKS_PER_SEC(sbi) -
+					get_ckpt_valid_blocks(sbi, segno, true);
+		}
 
 		blocks = i <= CURSEG_COLD_DATA ? data_blocks : node_blocks;
 		if (blocks > left_blocks)
@@ -596,8 +602,15 @@ static inline bool has_curseg_enough_space(struct f2fs_sb_info *sbi,
 	if (unlikely(segno == NULL_SEGNO))
 		return false;
 
-	left_blocks = CAP_BLKS_PER_SEC(sbi) -
-			get_ckpt_valid_blocks(sbi, segno, true);
+	if (f2fs_lfs_mode(sbi)) {
+		left_blocks = CAP_BLKS_PER_SEC(sbi) -
+				(segno - rounddown(segno, SEGS_PER_SEC(sbi))) * BLKS_PER_SEG(sbi) -
+				CURSEG_I(sbi, CURSEG_HOT_DATA)->next_blkoff;
+	} else {
+		left_blocks = CAP_BLKS_PER_SEC(sbi) -
+				get_ckpt_valid_blocks(sbi, segno, true);
+	}
+
 	if (dent_blocks > left_blocks)
 		return false;
 	return true;
-- 
2.33.0