1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
#include <mini-os/wait.h>
#include <xen/io/blkif.h>
#include <mini-os/types.h>
struct blkfront_dev;
struct blkfront_aiocb
{
struct blkfront_dev *aio_dev;
uint8_t *aio_buf;
size_t aio_nbytes;
off_t aio_offset;
size_t total_bytes;
uint8_t is_write;
void *data;
grant_ref_t gref[BLKIF_MAX_SEGMENTS_PER_REQUEST];
int n;
void (*aio_cb)(struct blkfront_aiocb *aiocb, int ret);
};
struct blkfront_info
{
uint64_t sectors;
unsigned sector_size;
int mode;
int info;
int barrier;
int flush;
};
struct blkfront_dev *init_blkfront(char *nodename, struct blkfront_info *info);
#ifdef HAVE_LIBC
#include <sys/stat.h>
/* POSIX IO functions:
* use blkfront_open() to get a file descriptor to the block device
* Don't use the other blkfront posix functions here directly, instead use
* read(), write(), lseek() and fstat() on the file descriptor
*/
int blkfront_open(struct blkfront_dev *dev);
int blkfront_posix_rwop(int fd, uint8_t* buf, size_t count, int write);
#define blkfront_posix_write(fd, buf, count) blkfront_posix_rwop(fd, (uint8_t*)buf, count, 1)
#define blkfront_posix_read(fd, buf, count) blkfront_posix_rwop(fd, (uint8_t*)buf, count, 0)
int blkfront_posix_fstat(int fd, struct stat* buf);
#endif
void blkfront_aio(struct blkfront_aiocb *aiocbp, int write);
#define blkfront_aio_read(aiocbp) blkfront_aio(aiocbp, 0)
#define blkfront_aio_write(aiocbp) blkfront_aio(aiocbp, 1)
void blkfront_io(struct blkfront_aiocb *aiocbp, int write);
#define blkfront_read(aiocbp) blkfront_io(aiocbp, 0)
#define blkfront_write(aiocbp) blkfront_io(aiocbp, 1)
void blkfront_aio_push_operation(struct blkfront_aiocb *aiocbp, uint8_t op);
int blkfront_aio_poll(struct blkfront_dev *dev);
void blkfront_sync(struct blkfront_dev *dev);
void shutdown_blkfront(struct blkfront_dev *dev);
extern struct wait_queue_head blkfront_queue;
|
