linux-2.6.25/request
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開始行:
*参照元 [#a8ae3579]
#backlinks
*説明 [#m8fbfa66]
-パス: [[linux-2.6.25/include/linux/blkdev.h]]
-FIXME: これは何？
--説明
**参考 [#r71b24a9]
*実装 [#uc366598]
struct request {
struct list_head queuelist;
struct list_head donelist;
struct request_queue *q;
unsigned int cmd_flags;
enum rq_cmd_type_bits cmd_type;
/* Maintain bio traversal state for part by part...
* hard_* are block layer internals, no driver s...
*/
sector_t sector; /* next sector t...
sector_t hard_sector; /* next sector t...
unsigned long nr_sectors; /* no. of sector...
unsigned long hard_nr_sectors; /* no. of sector...
/* no. of sectors left to submit in the current ...
unsigned int current_nr_sectors;
/* no. of sectors left to complete in the curren...
unsigned int hard_cur_sectors;
struct bio *bio;
struct bio *biotail;
struct hlist_node hash; /* merge hash */
/*
* The rb_node is only used inside the io schedu...
* are pruned when moved to the dispatch queue. ...
* completion_data share space with the rb_node.
*/
union {
struct rb_node rb_node; /* sort/lookup */
void *completion_data;
};
/*
* two pointers are available for the IO schedul...
* more they have to dynamically allocate it.
*/
void *elevator_private;
void *elevator_private2;
struct gendisk *rq_disk;
unsigned long start_time;
/* Number of scatter-gather DMA addr+len pairs a...
* physical address coalescing is performed.
*/
unsigned short nr_phys_segments;
/* Number of scatter-gather addr+len pairs after
* physical and DMA remapping hardware coalescin...
* This is the number of scatter-gather entries ...
* will actually have to deal with after DMA map...
*/
unsigned short nr_hw_segments;
unsigned short ioprio;
void *special;
char *buffer;
int tag;
int errors;
int ref_count;
/*
* when request is used as a packet command carr...
*/
unsigned int cmd_len;
unsigned char cmd[BLK_MAX_CDB];
unsigned int data_len;
unsigned int extra_len; /* length of alignment a...
unsigned int sense_len;
void *data;
void *sense;
unsigned int timeout;
int retries;
/*
* completion callback.
*/
rq_end_io_fn *end_io;
void *end_io_data;
/* for bidi */
struct request *next_rq;
};
*コメント [#w9c88c62]
終了行:
*参照元 [#a8ae3579]
#backlinks
*説明 [#m8fbfa66]
-パス: [[linux-2.6.25/include/linux/blkdev.h]]
-FIXME: これは何？
--説明
**参考 [#r71b24a9]
*実装 [#uc366598]
struct request {
struct list_head queuelist;
struct list_head donelist;
struct request_queue *q;
unsigned int cmd_flags;
enum rq_cmd_type_bits cmd_type;
/* Maintain bio traversal state for part by part...
* hard_* are block layer internals, no driver s...
*/
sector_t sector; /* next sector t...
sector_t hard_sector; /* next sector t...
unsigned long nr_sectors; /* no. of sector...
unsigned long hard_nr_sectors; /* no. of sector...
/* no. of sectors left to submit in the current ...
unsigned int current_nr_sectors;
/* no. of sectors left to complete in the curren...
unsigned int hard_cur_sectors;
struct bio *bio;
struct bio *biotail;
struct hlist_node hash; /* merge hash */
/*
* The rb_node is only used inside the io schedu...
* are pruned when moved to the dispatch queue. ...
* completion_data share space with the rb_node.
*/
union {
struct rb_node rb_node; /* sort/lookup */
void *completion_data;
};
/*
* two pointers are available for the IO schedul...
* more they have to dynamically allocate it.
*/
void *elevator_private;
void *elevator_private2;
struct gendisk *rq_disk;
unsigned long start_time;
/* Number of scatter-gather DMA addr+len pairs a...
* physical address coalescing is performed.
*/
unsigned short nr_phys_segments;
/* Number of scatter-gather addr+len pairs after
* physical and DMA remapping hardware coalescin...
* This is the number of scatter-gather entries ...
* will actually have to deal with after DMA map...
*/
unsigned short nr_hw_segments;
unsigned short ioprio;
void *special;
char *buffer;
int tag;
int errors;
int ref_count;
/*
* when request is used as a packet command carr...
*/
unsigned int cmd_len;
unsigned char cmd[BLK_MAX_CDB];
unsigned int data_len;
unsigned int extra_len; /* length of alignment a...
unsigned int sense_len;
void *data;
void *sense;
unsigned int timeout;
int retries;
/*
* completion callback.
*/
rq_end_io_fn *end_io;
void *end_io_data;
/* for bidi */
struct request *next_rq;
};
*コメント [#w9c88c62]
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