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-rw-r--r--include/linux/fscache.h50
1 files changed, 44 insertions, 6 deletions
diff --git a/include/linux/fscache.h b/include/linux/fscache.h
index 9ec20dec3353..7a086235da4b 100644
--- a/include/linux/fscache.h
+++ b/include/linux/fscache.h
@@ -135,14 +135,14 @@ struct fscache_cookie_def {
*/
void (*put_context)(void *cookie_netfs_data, void *context);
- /* indicate pages that now have cache metadata retained
- * - this function should mark the specified pages as now being cached
- * - the pages will have been marked with PG_fscache before this is
+ /* indicate page that now have cache metadata retained
+ * - this function should mark the specified page as now being cached
+ * - the page will have been marked with PG_fscache before this is
* called, so this is optional
*/
- void (*mark_pages_cached)(void *cookie_netfs_data,
- struct address_space *mapping,
- struct pagevec *cached_pvec);
+ void (*mark_page_cached)(void *cookie_netfs_data,
+ struct address_space *mapping,
+ struct page *page);
/* indicate the cookie is no longer cached
* - this function is called when the backing store currently caching
@@ -185,6 +185,8 @@ extern struct fscache_cookie *__fscache_acquire_cookie(
extern void __fscache_relinquish_cookie(struct fscache_cookie *, int);
extern void __fscache_update_cookie(struct fscache_cookie *);
extern int __fscache_attr_changed(struct fscache_cookie *);
+extern void __fscache_invalidate(struct fscache_cookie *);
+extern void __fscache_wait_on_invalidate(struct fscache_cookie *);
extern int __fscache_read_or_alloc_page(struct fscache_cookie *,
struct page *,
fscache_rw_complete_t,
@@ -390,6 +392,42 @@ int fscache_attr_changed(struct fscache_cookie *cookie)
}
/**
+ * fscache_invalidate - Notify cache that an object needs invalidation
+ * @cookie: The cookie representing the cache object
+ *
+ * Notify the cache that an object is needs to be invalidated and that it
+ * should abort any retrievals or stores it is doing on the cache. The object
+ * is then marked non-caching until such time as the invalidation is complete.
+ *
+ * This can be called with spinlocks held.
+ *
+ * See Documentation/filesystems/caching/netfs-api.txt for a complete
+ * description.
+ */
+static inline
+void fscache_invalidate(struct fscache_cookie *cookie)
+{
+ if (fscache_cookie_valid(cookie))
+ __fscache_invalidate(cookie);
+}
+
+/**
+ * fscache_wait_on_invalidate - Wait for invalidation to complete
+ * @cookie: The cookie representing the cache object
+ *
+ * Wait for the invalidation of an object to complete.
+ *
+ * See Documentation/filesystems/caching/netfs-api.txt for a complete
+ * description.
+ */
+static inline
+void fscache_wait_on_invalidate(struct fscache_cookie *cookie)
+{
+ if (fscache_cookie_valid(cookie))
+ __fscache_wait_on_invalidate(cookie);
+}
+
+/**
* fscache_reserve_space - Reserve data space for a cached object
* @cookie: The cookie representing the cache object
* @i_size: The amount of space to be reserved