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Diffstat (limited to 'kernel/include/linux/fscache-cache.h')
-rw-r--r--kernel/include/linux/fscache-cache.h55
1 files changed, 27 insertions, 28 deletions
diff --git a/kernel/include/linux/fscache-cache.h b/kernel/include/linux/fscache-cache.h
index 771484993..604e1526c 100644
--- a/kernel/include/linux/fscache-cache.h
+++ b/kernel/include/linux/fscache-cache.h
@@ -74,6 +74,7 @@ extern wait_queue_head_t fscache_cache_cleared_wq;
*/
typedef void (*fscache_operation_release_t)(struct fscache_operation *op);
typedef void (*fscache_operation_processor_t)(struct fscache_operation *op);
+typedef void (*fscache_operation_cancel_t)(struct fscache_operation *op);
enum fscache_operation_state {
FSCACHE_OP_ST_BLANK, /* Op is not yet submitted */
@@ -109,6 +110,9 @@ struct fscache_operation {
* the op in a non-pool thread */
fscache_operation_processor_t processor;
+ /* Operation cancellation cleanup (optional) */
+ fscache_operation_cancel_t cancel;
+
/* operation releaser */
fscache_operation_release_t release;
};
@@ -119,33 +123,17 @@ extern void fscache_op_work_func(struct work_struct *work);
extern void fscache_enqueue_operation(struct fscache_operation *);
extern void fscache_op_complete(struct fscache_operation *, bool);
extern void fscache_put_operation(struct fscache_operation *);
-
-/**
- * fscache_operation_init - Do basic initialisation of an operation
- * @op: The operation to initialise
- * @release: The release function to assign
- *
- * Do basic initialisation of an operation. The caller must still set flags,
- * object and processor if needed.
- */
-static inline void fscache_operation_init(struct fscache_operation *op,
- fscache_operation_processor_t processor,
- fscache_operation_release_t release)
-{
- INIT_WORK(&op->work, fscache_op_work_func);
- atomic_set(&op->usage, 1);
- op->state = FSCACHE_OP_ST_INITIALISED;
- op->debug_id = atomic_inc_return(&fscache_op_debug_id);
- op->processor = processor;
- op->release = release;
- INIT_LIST_HEAD(&op->pend_link);
-}
+extern void fscache_operation_init(struct fscache_operation *,
+ fscache_operation_processor_t,
+ fscache_operation_cancel_t,
+ fscache_operation_release_t);
/*
* data read operation
*/
struct fscache_retrieval {
struct fscache_operation op;
+ struct fscache_cookie *cookie; /* The netfs cookie */
struct address_space *mapping; /* netfs pages */
fscache_rw_complete_t end_io_func; /* function to call on I/O completion */
void *context; /* netfs read context (pinned) */
@@ -371,6 +359,7 @@ struct fscache_object {
#define FSCACHE_OBJECT_IS_LOOKED_UP 4 /* T if object has been looked up */
#define FSCACHE_OBJECT_IS_AVAILABLE 5 /* T if object has become active */
#define FSCACHE_OBJECT_RETIRED 6 /* T if object was retired on relinquishment */
+#define FSCACHE_OBJECT_KILLED_BY_CACHE 7 /* T if object was killed by the cache */
struct list_head cache_link; /* link in cache->object_list */
struct hlist_node cookie_link; /* link in cookie->backing_objects */
@@ -410,17 +399,16 @@ static inline bool fscache_object_is_available(struct fscache_object *object)
return test_bit(FSCACHE_OBJECT_IS_AVAILABLE, &object->flags);
}
-static inline bool fscache_object_is_active(struct fscache_object *object)
+static inline bool fscache_cache_is_broken(struct fscache_object *object)
{
- return fscache_object_is_available(object) &&
- fscache_object_is_live(object) &&
- !test_bit(FSCACHE_IOERROR, &object->cache->flags);
+ return test_bit(FSCACHE_IOERROR, &object->cache->flags);
}
-static inline bool fscache_object_is_dead(struct fscache_object *object)
+static inline bool fscache_object_is_active(struct fscache_object *object)
{
- return fscache_object_is_dying(object) &&
- test_bit(FSCACHE_IOERROR, &object->cache->flags);
+ return fscache_object_is_available(object) &&
+ fscache_object_is_live(object) &&
+ !fscache_cache_is_broken(object);
}
/**
@@ -551,4 +539,15 @@ extern enum fscache_checkaux fscache_check_aux(struct fscache_object *object,
const void *data,
uint16_t datalen);
+extern void fscache_object_retrying_stale(struct fscache_object *object);
+
+enum fscache_why_object_killed {
+ FSCACHE_OBJECT_IS_STALE,
+ FSCACHE_OBJECT_NO_SPACE,
+ FSCACHE_OBJECT_WAS_RETIRED,
+ FSCACHE_OBJECT_WAS_CULLED,
+};
+extern void fscache_object_mark_killed(struct fscache_object *object,
+ enum fscache_why_object_killed why);
+
#endif /* _LINUX_FSCACHE_CACHE_H */