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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Jaegeuk Kim <jaegeuk@kernel.org>,
	Chao Yu <chao@kernel.org>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 6.8 580/715] f2fs: check number of blocks in a current section
Date: Sun, 24 Mar 2024 18:32:39 -0400
Message-ID: <20240324223455.1342824-581-sashal@kernel.org>
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From: Jaegeuk Kim <jaegeuk@kernel.org>

[ Upstream commit 7af2df0f67a1469762e59be3726a803882d83f6f ]

In cfd66bb715fd ("f2fs: fix deadloop in foreground GC"), we needed to check
the number of blocks in a section instead of the segment.

Fixes: cfd66bb715fd ("f2fs: fix deadloop in foreground GC")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/f2fs/segment.h | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 8129be788bd56..c77a562831493 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -573,23 +573,22 @@ static inline bool has_curseg_enough_space(struct f2fs_sb_info *sbi,
 			unsigned int node_blocks, unsigned int dent_blocks)
 {
 
-	unsigned int segno, left_blocks;
+	unsigned segno, left_blocks;
 	int i;
 
-	/* check current node segment */
+	/* check current node sections in the worst case. */
 	for (i = CURSEG_HOT_NODE; i <= CURSEG_COLD_NODE; i++) {
 		segno = CURSEG_I(sbi, i)->segno;
-		left_blocks = f2fs_usable_blks_in_seg(sbi, segno) -
-				get_seg_entry(sbi, segno)->ckpt_valid_blocks;
-
+		left_blocks = CAP_BLKS_PER_SEC(sbi) -
+				get_ckpt_valid_blocks(sbi, segno, true);
 		if (node_blocks > left_blocks)
 			return false;
 	}
 
-	/* check current data segment */
+	/* check current data section for dentry blocks. */
 	segno = CURSEG_I(sbi, CURSEG_HOT_DATA)->segno;
-	left_blocks = f2fs_usable_blks_in_seg(sbi, segno) -
-			get_seg_entry(sbi, segno)->ckpt_valid_blocks;
+	left_blocks = CAP_BLKS_PER_SEC(sbi) -
+			get_ckpt_valid_blocks(sbi, segno, true);
 	if (dent_blocks > left_blocks)
 		return false;
 	return true;
@@ -638,7 +637,7 @@ static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi,
 
 	if (free_secs > upper_secs)
 		return false;
-	else if (free_secs <= lower_secs)
+	if (free_secs <= lower_secs)
 		return true;
 	return !curseg_space;
 }
-- 
2.43.0