#include <linux/highmem.h>
#include <linux/mempool.h>
+#include <linux/ioprio.h>
/* Platforms may set this to teach the BIO layer about IOMMU hardware. */
#include <asm/io.h>
void *bi_private;
bio_destructor_t *bi_destructor; /* destructor */
- struct bio_set *bi_set; /* memory pools set */
};
/*
#define BIO_RW_FAILFAST 3
#define BIO_RW_SYNC 4
+/*
+ * upper 16 bits of bi_rw define the io priority of this bio
+ */
+#define BIO_PRIO_SHIFT (8 * sizeof(unsigned long) - IOPRIO_BITS)
+#define bio_prio(bio) ((bio)->bi_rw >> BIO_PRIO_SHIFT)
+#define bio_prio_valid(bio) ioprio_valid(bio_prio(bio))
+
+#define bio_set_prio(bio, prio) do { \
+ WARN_ON(prio >= (1 << IOPRIO_BITS)); \
+ (bio)->bi_rw &= ((1UL << BIO_PRIO_SHIFT) - 1); \
+ (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT); \
+} while (0)
+
/*
* various member access, note that bio_data should of course not be used
* on highmem page vectors
extern struct bio *bio_alloc(unsigned int __nocast, int);
extern struct bio *bio_alloc_bioset(unsigned int __nocast, int, struct bio_set *);
extern void bio_put(struct bio *);
+extern void bio_free(struct bio *, struct bio_set *);
extern void bio_endio(struct bio *, unsigned int, int);
struct request_queue;
extern int bio_get_nr_vecs(struct block_device *);
extern struct bio *bio_map_user(struct request_queue *, struct block_device *,
unsigned long, unsigned int, int);
+struct sg_iovec;
+extern struct bio *bio_map_user_iov(struct request_queue *,
+ struct block_device *,
+ struct sg_iovec *, int, int);
extern void bio_unmap_user(struct bio *);
extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int,
unsigned int);