mars/mars_bio.h

67 lines
1.3 KiB
C

// (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
#ifndef MARS_BIO_H
#define MARS_BIO_H
#define BIO_SUBMIT_MAX_LATENCY 250 // 250 us
#define BIO_IO_R_MAX_LATENCY 40000 // 40 ms
#define BIO_IO_W_MAX_LATENCY 100000 // 100 ms
extern struct threshold bio_submit_threshold;
extern struct threshold bio_io_threshold[2];
#include <linux/blkdev.h>
struct bio_mref_aspect {
GENERIC_ASPECT(mref);
struct list_head io_head;
struct bio *bio;
struct bio_output *output;
unsigned long long start_stamp;
int status_code;
int hash_pos;
int alloc_len;
bool do_dealloc;
};
struct bio_brick {
MARS_BRICK(bio);
// tunables
int ra_pages;
int bg_threshold;
int bg_maxfly;
bool do_noidle;
bool do_sync;
bool do_unplug;
// readonly
loff_t total_size;
atomic_t fly_count[MARS_PRIO_NR];
atomic_t queue_count[MARS_PRIO_NR];
atomic_t completed_count;
atomic_t total_completed_count[MARS_PRIO_NR];
// private
spinlock_t lock;
struct list_head queue_list[MARS_PRIO_NR];
struct list_head submitted_list[2];
struct list_head completed_list;
wait_queue_head_t submit_event;
wait_queue_head_t response_event;
struct file *filp;
struct block_device *bdev;
brick_thread_t *submit_thread;
brick_thread_t *response_thread;
int bvec_max;
bool submitted;
};
struct bio_input {
MARS_INPUT(bio);
};
struct bio_output {
MARS_OUTPUT(bio);
};
MARS_TYPES(bio);
#endif