linux-kernel - [PATCH v3 2/3] quota: Replace all block number checking with helper function

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Date:   Fri, 23 Sep 2022 21:45:53 +0800
From:   Zhihao Cheng <chengzhihao1@...wei.com>
To:     <jack@...e.com>, <tytso@....edu>, <brauner@...nel.org>
CC:     <linux-fsdevel@...r.kernel.org>, <linux-ext4@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <chengzhihao1@...wei.com>,
        <yukuai3@...wei.com>
Subject: [PATCH v3 2/3] quota: Replace all block number checking with helper function

Cleanup all block checking places, replace them with helper function
do_check_range().

Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
---
 fs/quota/quota_tree.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/fs/quota/quota_tree.c b/fs/quota/quota_tree.c
index 7e65d67de9f3..0fa73ca28045 100644
--- a/fs/quota/quota_tree.c
+++ b/fs/quota/quota_tree.c
@@ -518,12 +518,10 @@ static int remove_tree(struct qtree_mem_dqinfo *info, struct dquot *dquot,
 		goto out_buf;
 	}
 	newblk = le32_to_cpu(ref[get_index(info, dquot->dq_id, depth)]);
-	if (newblk < QT_TREEOFF || newblk >= info->dqi_blocks) {
-		quota_error(dquot->dq_sb, "Getting block too big (%u >= %u)",
-			    newblk, info->dqi_blocks);
-		ret = -EUCLEAN;
+	ret = do_check_range(dquot->dq_sb, "block", newblk, QT_TREEOFF,
+			     info->dqi_blocks - 1);
+	if (ret)
 		goto out_buf;
-	}
 
 	if (depth == info->dqi_qtree_depth - 1) {
 		ret = free_dqentry(info, dquot, newblk);
@@ -624,12 +622,10 @@ static loff_t find_tree_dqentry(struct qtree_mem_dqinfo *info,
 	blk = le32_to_cpu(ref[get_index(info, dquot->dq_id, depth)]);
 	if (!blk)	/* No reference? */
 		goto out_buf;
-	if (blk < QT_TREEOFF || blk >= info->dqi_blocks) {
-		quota_error(dquot->dq_sb, "Getting block too big (%u >= %u)",
-			    blk, info->dqi_blocks);
-		ret = -EUCLEAN;
+	ret = do_check_range(dquot->dq_sb, "block", blk, QT_TREEOFF,
+			     info->dqi_blocks - 1);
+	if (ret)
 		goto out_buf;
-	}
 
 	if (depth < info->dqi_qtree_depth - 1)
 		ret = find_tree_dqentry(info, dquot, blk, depth+1);
-- 
2.31.1