diff options
Diffstat (limited to 'include/linux/fscache.h')
| -rw-r--r-- | include/linux/fscache.h | 50 |
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 |