#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_set *bioset_create(int, int, int);
extern void bioset_free(struct bio_set *);
-extern struct bio *bio_alloc(unsigned int __nocast, int);
-extern struct bio *bio_alloc_bioset(unsigned int __nocast, int, struct bio_set *);
+extern struct bio *bio_alloc(gfp_t, int);
+extern struct bio *bio_alloc_bioset(gfp_t, 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_hw_segments(struct request_queue *, struct bio *);
extern void __bio_clone(struct bio *, struct bio *);
-extern struct bio *bio_clone(struct bio *, unsigned int __nocast);
+extern struct bio *bio_clone(struct bio *, gfp_t);
extern void bio_init(struct bio *);
extern int bio_add_page(struct bio *, struct page *, unsigned int,unsigned int);
+extern int bio_add_pc_page(struct request_queue *, struct bio *, struct page *,
+ unsigned int, unsigned int);
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,
+ gfp_t);
extern void bio_set_pages_dirty(struct bio *bio);
extern void bio_check_pages_dirty(struct bio *bio);
extern struct bio *bio_copy_user(struct request_queue *, unsigned long, unsigned int, int);
* bvec_kmap_irq and bvec_kunmap_irq!!
*
* This function MUST be inlined - it plays with the CPU interrupt flags.
- * Hence the `extern inline'.
*/
-extern inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags)
+static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags)
{
unsigned long addr;
return (char *) addr + bvec->bv_offset;
}
-extern inline void bvec_kunmap_irq(char *buffer, unsigned long *flags)
+static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags)
{
unsigned long ptr = (unsigned long) buffer & PAGE_MASK;
#define bvec_kunmap_irq(buf, flags) do { *(flags) = 0; } while (0)
#endif
-extern inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx,
+static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx,
unsigned long *flags)
{
return bvec_kmap_irq(bio_iovec_idx(bio, idx), flags);