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