#include <linux/minmax.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
-#include <linux/backing-dev-defs.h>
#include <linux/wait.h>
#include <linux/mempool.h>
#include <linux/pfn.h>
* Maximum number of blkcg policies allowed to be registered concurrently.
* Defined here to simplify include dependency.
*/
-#define BLKCG_MAX_POLS 5
+#define BLKCG_MAX_POLS 6
typedef void (rq_end_io_fn)(struct request *, blk_status_t);
struct blk_mq_hw_ctx **queue_hw_ctx;
unsigned int nr_hw_queues;
- struct backing_dev_info *backing_dev_info;
-
/*
* The queue owner gets to use this for whatever they like.
* ll_rw_blk doesn't touch it.
spinlock_t queue_lock;
+ struct gendisk *disk;
+
/*
* queue kobject
*/
dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \
(dir), (attrs))
-#define queue_to_disk(q) (dev_to_disk(kobj_to_dev((q)->kobj.parent)))
-
static inline bool queue_is_mq(struct request_queue *q)
{
return q->mq_ops;
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
#endif
+#define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT)
+#define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT)
+#define SECTOR_MASK (PAGE_SECTORS - 1)
+
/*
* blk_rq_pos() : the current sector
* blk_rq_bytes() : bytes left in the entire request
unsigned int size);
extern void blk_queue_alignment_offset(struct request_queue *q,
unsigned int alignment);
-void blk_queue_update_readahead(struct request_queue *q);
+void disk_update_readahead(struct gendisk *disk);
extern void blk_limits_io_min(struct queue_limits *limits, unsigned int min);
extern void blk_queue_io_min(struct request_queue *q, unsigned int min);
extern void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt);
return offset << SECTOR_SHIFT;
}
+/*
+ * Two cases of handling DISCARD merge:
+ * If max_discard_segments > 1, the driver takes every bio
+ * as a range and send them to controller together. The ranges
+ * needn't to be contiguous.
+ * Otherwise, the bios/requests will be handled as same as
+ * others which should be contiguous.
+ */
+static inline bool blk_discard_mergable(struct request *req)
+{
+ if (req_op(req) == REQ_OP_DISCARD &&
+ queue_max_discard_segments(req->q) > 1)
+ return true;
+ return false;
+}
+
static inline int bdev_discard_alignment(struct block_device *bdev)
{
struct request_queue *q = bdev_get_queue(bdev);
char *(*devnode)(struct gendisk *disk, umode_t *mode);
struct module *owner;
const struct pr_ops *pr_ops;
+
+ /*
+ * Special callback for probing GPT entry at a given sector.
+ * Needed by Android devices, used by GPT scanner and MMC blk
+ * driver.
+ */
+ int (*alternative_gpt_sector)(struct gendisk *disk, sector_t *sector);
};
#ifdef CONFIG_COMPAT
struct block_device *bdev_alloc(struct gendisk *disk, u8 partno);
void bdev_add(struct block_device *bdev, dev_t dev);
struct block_device *I_BDEV(struct inode *inode);
-struct block_device *bdgrab(struct block_device *bdev);
-void bdput(struct block_device *);
int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
loff_t lend);