Block I/O Requests

include/block/bio.h

struct bio_request

struct bio_request {
    enum bio_request_priority  priority;
    struct block_device        *disk;
    uint64_t                   lba;
    void                       *buffer;
    uint64_t                   size;
    uint64_t                   sector_count;
    bool                       write;
    void                       (*on_complete)(struct bio_request *);
    void                       *user_data;
    bool                       done;
    enum bio_request_status    status;
    void                       *driver_private;
    void                       *driver_private2;
    struct list_head           list;
    bool                       skip;
    bool                       is_aggregate;
    struct bio_request         *next_coalesced;
    uint64_t                   enqueue_time;
    uint8_t                    boost_count;
};

struct bio_request referenced types:

• enum bio_request_priority
• struct block_device
• enum bio_request_status
• struct list_head
• struct bio_request

enum bio_request_priority

enum bio_request_priority {
    BIO_RQ_BACKGROUND = 0,
    BIO_RQ_LOW = 1,
    BIO_RQ_MEDIUM = 2,
    BIO_RQ_HIGH = 3,
    BIO_RQ_URGENT = 4,
};

enum bio_request_status

enum bio_request_status {
    BIO_STATUS_OK = 0,
    BIO_STATUS_INFLIGHT = -1,
    BIO_STATUS_INVAL_ARG = -2,
    BIO_STATUS_INVAL_INTERNAL = -3,
    BIO_STATUS_TIMEOUT = -4,
    BIO_STATUS_DEVICE_FAULT = -5,
    BIO_STATUS_UNCORRECTABLE = -6,
    BIO_STATUS_ABRT = -7,
    BIO_STATUS_MEDIA_CHANGE = -8,
    BIO_STATUS_ID_NOT_FOUND = -9,
    BIO_STATUS_BAD_SECTOR = -10,
    BIO_STATUS_WRITE_PROTECT = -11,
    BIO_STATUS_UNKNOWN_ERR = -12,
};

bio_create_write

struct bio_request * bio_create_write(struct block_device *d, uint64_t lba, uint64_t sectors, uint64_t size, void (*cb)(struct bio_request *), void *user, void *buf);

bio_create_write referenced types:

• struct bio_request
• struct block_device

bio_create_read

struct bio_request * bio_create_read(struct block_device *d, uint64_t lba, uint64_t sectors, uint64_t size, void (*cb)(struct bio_request *), void *user, void *buf);

bio_create_read referenced types:

• struct bio_request
• struct block_device

Defines

bio_request_from_list_node(ln)

#define bio_request_from_list_node(ln)                                         \ (container_of(ln, struct bio_request, list))

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