linux-kernel - [PATCH 08/11] ubifs: setflags: Don't make a budget for 'ui->data

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Date:   Mon, 25 Oct 2021 11:41:13 +0800
From:   Zhihao Cheng <chengzhihao1@...wei.com>
To:     <richard@....at>, <miquel.raynal@...tlin.com>, <vigneshr@...com>,
        <mcoquelin.stm32@...il.com>, <alexandre.torgue@...s.st.com>,
        <Artem.Bityutskiy@...ia.com>, <ext-adrian.hunter@...ia.com>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <chengzhihao1@...wei.com>
Subject: [PATCH 08/11] ubifs: setflags: Don't make a budget for 'ui->data_len'

'setflags()' affects regular files and directories, only xattr inode,
symlink inode and special inode(pipe/char_dev/block_dev) have none-
zero 'ui->data_len' field.

Remove superfluous space budget for 'dirtied_ino_d', besides add an
assert to verify that 'setflags()' only operates ubifs inode with
zero data_len.

Fixes: 1e51764a3c2ac05a ("UBIFS: add new flash file system")
Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
---
 fs/ubifs/ioctl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index c6a863487780..ed95e97a3740 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -107,9 +107,9 @@ static int setflags(struct inode *inode, int flags)
 	int err, release;
 	struct ubifs_inode *ui = ubifs_inode(inode);
 	struct ubifs_info *c = inode->i_sb->s_fs_info;
-	struct ubifs_budget_req req = { .dirtied_ino = 1,
-					.dirtied_ino_d = ui->data_len };
+	struct ubifs_budget_req req = { .dirtied_ino = 1 };
 
+	ubifs_assert(c, !ui->data_len);
 	err = ubifs_budget_space(c, &req);
 	if (err)
 		return err;
-- 
2.31.1