linux-kernel - [PATCH v2] f2fs-tools: allocate logs after conventional area for HM zoned devices

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Message-ID: <20240131183306.536372-1-daeho43@gmail.com>
Date: Wed, 31 Jan 2024 10:33:06 -0800
From: Daeho Jeong <daeho43@...il.com>
To: linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	kernel-team@...roid.com
Cc: Daeho Jeong <daehojeong@...gle.com>
Subject: [PATCH v2] f2fs-tools: allocate logs after conventional area for HM zoned devices

From: Daeho Jeong <daehojeong@...gle.com>

Make to allocate logs after conventional area for HM zoned devices to
spare them for file pinning support.

Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
---
v2: make current segment numbers relative to main start block. check
    zoned block availability before the allocation.
---
 mkfs/f2fs_format.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c
index f2840c8..57ea9ea 100644
--- a/mkfs/f2fs_format.c
+++ b/mkfs/f2fs_format.c
@@ -558,6 +558,16 @@ static int f2fs_prepare_super_block(void)
 		c.cur_seg[CURSEG_WARM_DATA] = next_zone(CURSEG_COLD_DATA);
 	} else if (c.zoned_mode) {
 		c.cur_seg[CURSEG_HOT_NODE] = 0;
+		if (c.zoned_model == F2FS_ZONED_HM) {
+			uint32_t conv_zones =
+				c.devices[0].total_segments / c.segs_per_zone
+				- total_meta_zones;
+
+			if (total_zones - conv_zones >= avail_zones)
+				c.cur_seg[CURSEG_HOT_NODE] =
+					(c.devices[1].start_blkaddr -
+					 get_sb(main_blkaddr)) / c.blks_per_seg;
+		}
 		c.cur_seg[CURSEG_WARM_NODE] = next_zone(CURSEG_HOT_NODE);
 		c.cur_seg[CURSEG_COLD_NODE] = next_zone(CURSEG_WARM_NODE);
 		c.cur_seg[CURSEG_HOT_DATA] = next_zone(CURSEG_COLD_NODE);
-- 
2.43.0.429.g432eaa2c6b-goog