diff mbox series

[v3,1/5] quota: factor out dquot_write_dquot()

Message ID 20230630110822.3881712-2-libaokun1@huawei.com (mailing list archive)
State New, archived
Headers show
Series quota: fix race condition between dqput() and dquot_mark_dquot_dirty() | expand

Commit Message

Baokun Li June 30, 2023, 11:08 a.m. UTC 
Refactor out dquot_write_dquot() to reduce duplicate code.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
---
V2->V3:
	No change.

 fs/quota/dquot.c | 39 ++++++++++++++++-----------------------
 1 file changed, 16 insertions(+), 23 deletions(-)
diff mbox series

Patch

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index e3e4f4047657..108ba9f1e420 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -628,6 +628,18 @@  int dquot_scan_active(struct super_block *sb,
 }
 EXPORT_SYMBOL(dquot_scan_active);
 
+static inline int dquot_write_dquot(struct dquot *dquot)
+{
+	int ret = dquot->dq_sb->dq_op->write_dquot(dquot);
+	if (ret < 0) {
+		quota_error(dquot->dq_sb, "Can't write quota structure "
+			    "(error %d). Quota may get out of sync!", ret);
+		/* Clear dirty bit anyway to avoid infinite loop. */
+		clear_dquot_dirty(dquot);
+	}
+	return ret;
+}
+
 /* Write all dquot structures to quota files */
 int dquot_writeback_dquots(struct super_block *sb, int type)
 {
@@ -658,16 +670,9 @@  int dquot_writeback_dquots(struct super_block *sb, int type)
 			 * use count */
 			dqgrab(dquot);
 			spin_unlock(&dq_list_lock);
-			err = sb->dq_op->write_dquot(dquot);
-			if (err) {
-				/*
-				 * Clear dirty bit anyway to avoid infinite
-				 * loop here.
-				 */
-				clear_dquot_dirty(dquot);
-				if (!ret)
-					ret = err;
-			}
+			err = dquot_write_dquot(dquot);
+			if (err && !ret)
+				ret = err;
 			dqput(dquot);
 			spin_lock(&dq_list_lock);
 		}
@@ -765,8 +770,6 @@  static struct shrinker dqcache_shrinker = {
  */
 void dqput(struct dquot *dquot)
 {
-	int ret;
-
 	if (!dquot)
 		return;
 #ifdef CONFIG_QUOTA_DEBUG
@@ -794,17 +797,7 @@  void dqput(struct dquot *dquot)
 	if (dquot_dirty(dquot)) {
 		spin_unlock(&dq_list_lock);
 		/* Commit dquot before releasing */
-		ret = dquot->dq_sb->dq_op->write_dquot(dquot);
-		if (ret < 0) {
-			quota_error(dquot->dq_sb, "Can't write quota structure"
-				    " (error %d). Quota may get out of sync!",
-				    ret);
-			/*
-			 * We clear dirty bit anyway, so that we avoid
-			 * infinite loop here
-			 */
-			clear_dquot_dirty(dquot);
-		}
+		dquot_write_dquot(dquot);
 		goto we_slept;
 	}
 	if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) {