linux-kernel - [PATCH] quota: fix to propagate error of mark_dquot

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Date: Fri, 12 Apr 2024 17:49:42 +0800
From: Chao Yu <chao@...nel.org>
To: Jan Kara <jack@...e.com>
Cc: linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Chao Yu <chao@...nel.org>
Subject: [PATCH] quota: fix to propagate error of mark_dquot_dirty() to caller

in order to let caller be aware of failure of mark_dquot_dirty().

Signed-off-by: Chao Yu <chao@...nel.org>
---
 fs/quota/dquot.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index dacbee455c03..b2a109d8b198 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1737,7 +1737,7 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
 
 	if (reserve)
 		goto out_flush_warn;
-	mark_all_dquot_dirty(dquots);
+	ret = mark_all_dquot_dirty(dquots);
 out_flush_warn:
 	srcu_read_unlock(&dquot_srcu, index);
 	flush_warnings(warn);
@@ -1786,7 +1786,7 @@ int dquot_alloc_inode(struct inode *inode)
 warn_put_all:
 	spin_unlock(&inode->i_lock);
 	if (ret == 0)
-		mark_all_dquot_dirty(dquots);
+		ret = mark_all_dquot_dirty(dquots);
 	srcu_read_unlock(&dquot_srcu, index);
 	flush_warnings(warn);
 	return ret;
@@ -1990,7 +1990,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
 	qsize_t inode_usage = 1;
 	struct dquot __rcu **dquots;
 	struct dquot *transfer_from[MAXQUOTAS] = {};
-	int cnt, index, ret = 0;
+	int cnt, index, ret = 0, err;
 	char is_valid[MAXQUOTAS] = {};
 	struct dquot_warn warn_to[MAXQUOTAS];
 	struct dquot_warn warn_from_inodes[MAXQUOTAS];
@@ -2087,8 +2087,12 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
 	 * mark_all_dquot_dirty().
 	 */
 	index = srcu_read_lock(&dquot_srcu);
-	mark_all_dquot_dirty((struct dquot __rcu **)transfer_from);
-	mark_all_dquot_dirty((struct dquot __rcu **)transfer_to);
+	err = mark_all_dquot_dirty((struct dquot __rcu **)transfer_from);
+	if (err < 0)
+		ret = err;
+	err = mark_all_dquot_dirty((struct dquot __rcu **)transfer_to);
+	if (err < 0)
+		ret = err;
 	srcu_read_unlock(&dquot_srcu, index);
 
 	flush_warnings(warn_to);
@@ -2098,7 +2102,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		if (is_valid[cnt])
 			transfer_to[cnt] = transfer_from[cnt];
-	return 0;
+	return ret;
 over_quota:
 	/* Back out changes we already did */
 	for (cnt--; cnt >= 0; cnt--) {
@@ -2726,6 +2730,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
 	struct mem_dqblk *dm = &dquot->dq_dqb;
 	int check_blim = 0, check_ilim = 0;
 	struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
+	int ret;
 
 	if (di->d_fieldmask & ~VFS_QC_MASK)
 		return -EINVAL;
@@ -2807,7 +2812,9 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
 	else
 		set_bit(DQ_FAKE_B, &dquot->dq_flags);
 	spin_unlock(&dquot->dq_dqb_lock);
-	mark_dquot_dirty(dquot);
+	ret = mark_dquot_dirty(dquot);
+	if (ret < 0)
+		return ret;
 
 	return 0;
 }
-- 
2.40.1