@@ -222,6 +222,8 @@ static inline bool cache_is_expired(struct cache_detail *detail, struct cache_he
return detail->flush_time >= h->last_refresh;
}
+extern int cache_check_rcu(struct cache_detail *detail,
+ struct cache_head *h, struct cache_req *rqstp);
extern int cache_check(struct cache_detail *detail,
struct cache_head *h, struct cache_req *rqstp);
extern void cache_flush(void);
@@ -281,21 +281,7 @@ static int try_to_negate_entry(struct cache_detail *detail, struct cache_head *h
return rv;
}
-/*
- * This is the generic cache management routine for all
- * the authentication caches.
- * It checks the currency of a cache item and will (later)
- * initiate an upcall to fill it if needed.
- *
- *
- * Returns 0 if the cache_head can be used, or cache_puts it and returns
- * -EAGAIN if upcall is pending and request has been queued
- * -ETIMEDOUT if upcall failed or request could not be queue or
- * upcall completed but item is still invalid (implying that
- * the cache item has been replaced with a newer one).
- * -ENOENT if cache entry was negative
- */
-int cache_check(struct cache_detail *detail,
+int cache_check_rcu(struct cache_detail *detail,
struct cache_head *h, struct cache_req *rqstp)
{
int rv;
@@ -336,6 +322,31 @@ int cache_check(struct cache_detail *detail,
rv = -ETIMEDOUT;
}
}
+
+ return rv;
+}
+EXPORT_SYMBOL_GPL(cache_check_rcu);
+
+/*
+ * This is the generic cache management routine for all
+ * the authentication caches.
+ * It checks the currency of a cache item and will (later)
+ * initiate an upcall to fill it if needed.
+ *
+ *
+ * Returns 0 if the cache_head can be used, or cache_puts it and returns
+ * -EAGAIN if upcall is pending and request has been queued
+ * -ETIMEDOUT if upcall failed or request could not be queue or
+ * upcall completed but item is still invalid (implying that
+ * the cache item has been replaced with a newer one).
+ * -ENOENT if cache entry was negative
+ */
+int cache_check(struct cache_detail *detail,
+ struct cache_head *h, struct cache_req *rqstp)
+{
+ int rv;
+
+ rv = cache_check_rcu(detail, h, rqstp);
if (rv)
cache_put(h, detail);
return rv;
This is a prepare patch to add cache_check_rcu, will use it with follow patch. Suggested-by: NeilBrown <neilb@suse.de> Signed-off-by: Yang Erkun <yangerkun@huawei.com> --- include/linux/sunrpc/cache.h | 2 ++ net/sunrpc/cache.c | 41 +++++++++++++++++++++++------------- 2 files changed, 28 insertions(+), 15 deletions(-)