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

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Message-ID: <20250418040803.2118-1-yohan.joung@sk.com>
Date: Fri, 18 Apr 2025 13:08:02 +0900
From: "yohan.joung" <yohan.joung@...com>
To: jaegeuk@...nel.org,
	chao@...nel.org,
	daeho43@...il.com
Cc: linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org,
	pilhyun.kim@...com,
	"yohan.joung" <yohan.joung@...com>
Subject: [PATCH] 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 0465dc00b349..07c07b44e21e 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -569,8 +569,14 @@ 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)
@@ -583,8 +589,15 @@ 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