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From: libaokun@huaweicloud.com
To: netfs@lists.linux.dev
Cc: dhowells@redhat.com,
	jlayton@kernel.org,
	zhujia.zj@bytedance.com,
	jefflexu@linux.alibaba.com,
	linux-cachefs@redhat.com,
	linux-erofs@lists.ozlabs.org,
	linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	libaokun@huaweicloud.com,
	Baokun Li <libaokun1@huawei.com>
Subject: [PATCH 2/5] cachefiles: flush all requests for the object that is being dropped
Date: Wed, 24 Apr 2024 11:34:06 +0800
Message-Id: <20240424033409.2735257-3-libaokun@huaweicloud.com>
In-Reply-To: <20240424033409.2735257-1-libaokun@huaweicloud.com>
References: <20240424033409.2735257-1-libaokun@huaweicloud.com>
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From: Baokun Li <libaokun1@huawei.com>

Because after an object is dropped, requests for that object are useless,
flush them to avoid causing other problems.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
---
 fs/cachefiles/ondemand.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/fs/cachefiles/ondemand.c b/fs/cachefiles/ondemand.c
index 73da4d4eaa9b..d24bff43499b 100644
--- a/fs/cachefiles/ondemand.c
+++ b/fs/cachefiles/ondemand.c
@@ -564,12 +564,31 @@ int cachefiles_ondemand_init_object(struct cachefiles_object *object)
 
 void cachefiles_ondemand_clean_object(struct cachefiles_object *object)
 {
+	unsigned long index;
+	struct cachefiles_req *req;
+	struct cachefiles_cache *cache;
+
 	if (!object->ondemand)
 		return;
 
 	cachefiles_ondemand_send_req(object, CACHEFILES_OP_CLOSE, 0,
 			cachefiles_ondemand_init_close_req, NULL);
+
+	if (!object->ondemand->ondemand_id)
+		return;
+
+	/* Flush all requests for the object that is being dropped. */
+	cache = object->volume->cache;
+	xa_lock(&cache->reqs);
 	cachefiles_ondemand_set_object_dropping(object);
+	xa_for_each(&cache->reqs, index, req) {
+		if (req->object == object) {
+			req->error = -EIO;
+			complete(&req->done);
+			__xa_erase(&cache->reqs, index);
+		}
+	}
+	xa_unlock(&cache->reqs);
 }
 
 int cachefiles_ondemand_init_obj_info(struct cachefiles_object *object,
-- 
2.39.2