linux-kernel - [PATCH 4/6] ubifs: Fix wrong dirty space budget for dirty inode

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Date:   Tue, 11 Oct 2022 11:47:30 +0800
From:   Zhihao Cheng <chengzhihao1@...wei.com>
To:     <richard@....at>, <s.hauer@...gutronix.de>,
        <miquel.raynal@...tlin.com>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <chengzhihao1@...wei.com>, <yukuai3@...wei.com>
Subject: [PATCH 4/6] ubifs: Fix wrong dirty space budget for dirty inode

Each dirty inode should reserve 'c->bi.inode_budget' bytes in space
budget calculation. Currently, space budget for dirty inode reports
more space than what UBIFS actually needs to write.

Fixes: 1e51764a3c2ac0 ("UBIFS: add new flash file system")
Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
---
 fs/ubifs/budget.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c
index e8b9b756f0ac..986e6e4081c7 100644
--- a/fs/ubifs/budget.c
+++ b/fs/ubifs/budget.c
@@ -400,7 +400,7 @@ static int calc_dd_growth(const struct ubifs_info *c,
 	dd_growth = req->dirtied_page ? c->bi.page_budget : 0;
 
 	if (req->dirtied_ino)
-		dd_growth += c->bi.inode_budget << (req->dirtied_ino - 1);
+		dd_growth += c->bi.inode_budget * req->dirtied_ino;
 	if (req->mod_dent)
 		dd_growth += c->bi.dent_budget;
 	dd_growth += req->dirtied_ino_d;
-- 
2.31.1