typedef void (*fscache_operation_release_t)(struct fscache_operation *op);
typedef void (*fscache_operation_processor_t)(struct fscache_operation *op);
+enum fscache_operation_state {
+ FSCACHE_OP_ST_BLANK, /* Op is not yet submitted */
+ FSCACHE_OP_ST_INITIALISED, /* Op is initialised */
+ FSCACHE_OP_ST_PENDING, /* Op is blocked from running */
+ FSCACHE_OP_ST_IN_PROGRESS, /* Op is in progress */
+ FSCACHE_OP_ST_COMPLETE, /* Op is complete */
+ FSCACHE_OP_ST_CANCELLED, /* Op has been cancelled */
+ FSCACHE_OP_ST_DEAD /* Op is now dead */
+};
+
struct fscache_operation {
struct work_struct work; /* record for async ops */
struct list_head pend_link; /* link in object->pending_ops */
#define FSCACHE_OP_MYTHREAD 0x0002 /* - processing is done be issuing thread, not pool */
#define FSCACHE_OP_WAITING 4 /* cleared when op is woken */
#define FSCACHE_OP_EXCLUSIVE 5 /* exclusive op, other ops must wait */
-#define FSCACHE_OP_DEAD 6 /* op is now dead */
-#define FSCACHE_OP_DEC_READ_CNT 7 /* decrement object->n_reads on destruction */
-#define FSCACHE_OP_KEEP_FLAGS 0xc0 /* flags to keep when repurposing an op */
+#define FSCACHE_OP_DEC_READ_CNT 6 /* decrement object->n_reads on destruction */
+#define FSCACHE_OP_KEEP_FLAGS 0x0070 /* flags to keep when repurposing an op */
+ enum fscache_operation_state state;
atomic_t usage;
unsigned debug_id; /* debugging ID */
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 *);
/**
{
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;
void *context; /* netfs read context (pinned) */
struct list_head to_do; /* list of things to be done by the backend */
unsigned long start_time; /* time at which retrieval started */
+ unsigned n_pages; /* number of pages to be retrieved */
};
typedef int (*fscache_page_retrieval_func_t)(struct fscache_retrieval *op,
fscache_enqueue_operation(&op->op);
}
+/**
+ * fscache_retrieval_complete - Record (partial) completion of a retrieval
+ * @op: The retrieval operation affected
+ * @n_pages: The number of pages to account for
+ */
+static inline void fscache_retrieval_complete(struct fscache_retrieval *op,
+ int n_pages)
+{
+ op->n_pages -= n_pages;
+ if (op->n_pages <= 0)
+ fscache_op_complete(&op->op, true);
+}
+
/**
* fscache_put_retrieval - Drop a reference to a retrieval operation
* @op: The retrieval operation affected
+ * @n_pages: The number of pages to account for
*
* Drop a reference to a retrieval operation.
*/
/* store the updated auxiliary data on an object */
void (*update_object)(struct fscache_object *object);
+ /* Invalidate an object */
+ void (*invalidate_object)(struct fscache_operation *op);
+
/* discard the resources pinned by an object and effect retirement if
* necessary */
void (*drop_object)(struct fscache_object *object);
#define FSCACHE_COOKIE_PENDING_FILL 3 /* T if pending initial fill on object */
#define FSCACHE_COOKIE_FILLING 4 /* T if filling object incrementally */
#define FSCACHE_COOKIE_UNAVAILABLE 5 /* T if cookie is unavailable (error, etc) */
+#define FSCACHE_COOKIE_WAITING_ON_READS 6 /* T if cookie is waiting on reads */
+#define FSCACHE_COOKIE_INVALIDATING 7 /* T if cookie is being invalidated */
};
extern struct fscache_cookie fscache_fsdef_index;
+/*
+ * Event list for fscache_object::{event_mask,events}
+ */
+enum {
+ FSCACHE_OBJECT_EV_REQUEUE, /* T if object should be requeued */
+ FSCACHE_OBJECT_EV_UPDATE, /* T if object should be updated */
+ FSCACHE_OBJECT_EV_INVALIDATE, /* T if cache requested object invalidation */
+ FSCACHE_OBJECT_EV_CLEARED, /* T if accessors all gone */
+ FSCACHE_OBJECT_EV_ERROR, /* T if fatal error occurred during processing */
+ FSCACHE_OBJECT_EV_RELEASE, /* T if netfs requested object release */
+ FSCACHE_OBJECT_EV_RETIRE, /* T if netfs requested object retirement */
+ FSCACHE_OBJECT_EV_WITHDRAW, /* T if cache requested object withdrawal */
+ NR_FSCACHE_OBJECT_EVENTS
+};
+
+#define FSCACHE_OBJECT_EVENTS_MASK ((1UL << NR_FSCACHE_OBJECT_EVENTS) - 1)
+
/*
* on-disk cache file or index handle
*/
/* active states */
FSCACHE_OBJECT_AVAILABLE, /* cleaning up object after creation */
FSCACHE_OBJECT_ACTIVE, /* object is usable */
+ FSCACHE_OBJECT_INVALIDATING, /* object is invalidating */
FSCACHE_OBJECT_UPDATING, /* object is updating */
/* terminal states */
int debug_id; /* debugging ID */
int n_children; /* number of child objects */
- int n_ops; /* number of ops outstanding on object */
+ int n_ops; /* number of extant ops on object */
int n_obj_ops; /* number of object ops outstanding on object */
int n_in_progress; /* number of ops in progress */
- int n_exclusive; /* number of exclusive ops queued */
+ int n_exclusive; /* number of exclusive ops queued or in progress */
atomic_t n_reads; /* number of read ops in progress */
spinlock_t lock; /* state and operations lock */
unsigned long event_mask; /* events this object is interested in */
unsigned long events; /* events to be processed by this object
* (order is important - using fls) */
-#define FSCACHE_OBJECT_EV_REQUEUE 0 /* T if object should be requeued */
-#define FSCACHE_OBJECT_EV_UPDATE 1 /* T if object should be updated */
-#define FSCACHE_OBJECT_EV_CLEARED 2 /* T if accessors all gone */
-#define FSCACHE_OBJECT_EV_ERROR 3 /* T if fatal error occurred during processing */
-#define FSCACHE_OBJECT_EV_RELEASE 4 /* T if netfs requested object release */
-#define FSCACHE_OBJECT_EV_RETIRE 5 /* T if netfs requested object retirement */
-#define FSCACHE_OBJECT_EV_WITHDRAW 6 /* T if cache requested object withdrawal */
-#define FSCACHE_OBJECT_EVENTS_MASK 0x7f /* mask of all events*/
unsigned long flags;
#define FSCACHE_OBJECT_LOCK 0 /* T if object is busy being processed */
extern void fscache_io_error(struct fscache_cache *cache);
+extern void fscache_mark_page_cached(struct fscache_retrieval *op,
+ struct page *page);
+
extern void fscache_mark_pages_cached(struct fscache_retrieval *op,
struct pagevec *pagevec);
git.openpandora.org / pandora-kernel.git / blobdiff