linux-kernel - [PATCH] f2fs: subtract current_reserved

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Message-ID: <20250304192041.4048741-1-daeho43@gmail.com>
Date: Tue,  4 Mar 2025 11:20:41 -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] f2fs: subtract current_reserved_blocks from total

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

current_reserved_blocks is not allowed to utilize. For some zoned
storage devices, vendors will provide extra space which was used for
device level GC than specs and we will use this space for filesystem
level GC. This extra space should not be shown to users, otherwise,
users will see not standardized size number like 530GB, not 512GB.

Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
---
 fs/f2fs/super.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 19b67828ae32..c346dcc2518a 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1833,10 +1833,9 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_type = F2FS_SUPER_MAGIC;
 	buf->f_bsize = sbi->blocksize;
 
-	buf->f_blocks = total_count - start_count;
-
 	spin_lock(&sbi->stat_lock);
 
+	buf->f_blocks = total_count - start_count - sbi->current_reserved_blocks;
 	user_block_count = sbi->user_block_count;
 	total_valid_node_count = valid_node_count(sbi);
 	avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
-- 
2.48.1.711.g2feabab25a-goog