1 #ifndef KVM__DISK_IMAGE_H 2 #define KVM__DISK_IMAGE_H 3 4 #include "kvm/read-write.h" 5 #include "kvm/util.h" 6 #include "kvm/parse-options.h" 7 8 #include <linux/types.h> 9 #include <linux/fs.h> /* for BLKGETSIZE64 */ 10 #include <sys/ioctl.h> 11 #include <sys/types.h> 12 #include <sys/mman.h> 13 #include <sys/stat.h> 14 #include <stdbool.h> 15 #include <sys/uio.h> 16 #include <stdbool.h> 17 #include <stddef.h> 18 #include <stdlib.h> 19 #include <unistd.h> 20 #include <fcntl.h> 21 22 #define SECTOR_SHIFT 9 23 #define SECTOR_SIZE (1UL << SECTOR_SHIFT) 24 25 enum { 26 DISK_IMAGE_REGULAR, 27 DISK_IMAGE_MMAP, 28 }; 29 30 #define MAX_DISK_IMAGES 4 31 32 struct disk_image; 33 34 struct disk_image_operations { 35 ssize_t (*read)(struct disk_image *disk, u64 sector, const struct iovec *iov, 36 int iovcount, void *param); 37 ssize_t (*write)(struct disk_image *disk, u64 sector, const struct iovec *iov, 38 int iovcount, void *param); 39 int (*flush)(struct disk_image *disk); 40 int (*close)(struct disk_image *disk); 41 }; 42 43 struct disk_image_params { 44 const char *filename; 45 /* 46 * wwpn == World Wide Port Number 47 * tpgt == Target Portal Group Tag 48 */ 49 const char *wwpn; 50 const char *tpgt; 51 bool readonly; 52 bool direct; 53 }; 54 55 struct disk_image { 56 int fd; 57 u64 size; 58 struct disk_image_operations *ops; 59 void *priv; 60 void *disk_req_cb_param; 61 void (*disk_req_cb)(void *param, long len); 62 bool readonly; 63 bool async; 64 int evt; 65 #ifdef CONFIG_HAS_AIO 66 io_context_t ctx; 67 #endif 68 const char *wwpn; 69 const char *tpgt; 70 int debug_iodelay; 71 }; 72 73 int disk_img_name_parser(const struct option *opt, const char *arg, int unset); 74 int disk_image__init(struct kvm *kvm); 75 int disk_image__exit(struct kvm *kvm); 76 struct disk_image *disk_image__new(int fd, u64 size, struct disk_image_operations *ops, int mmap); 77 int disk_image__flush(struct disk_image *disk); 78 ssize_t disk_image__read(struct disk_image *disk, u64 sector, const struct iovec *iov, 79 int iovcount, void *param); 80 ssize_t disk_image__write(struct disk_image *disk, u64 sector, const struct iovec *iov, 81 int iovcount, void *param); 82 ssize_t disk_image__get_serial(struct disk_image *disk, void *buffer, ssize_t *len); 83 84 struct disk_image *raw_image__probe(int fd, struct stat *st, bool readonly); 85 struct disk_image *blkdev__probe(const char *filename, int flags, struct stat *st); 86 87 ssize_t raw_image__read(struct disk_image *disk, u64 sector, 88 const struct iovec *iov, int iovcount, void *param); 89 ssize_t raw_image__write(struct disk_image *disk, u64 sector, 90 const struct iovec *iov, int iovcount, void *param); 91 ssize_t raw_image__read_mmap(struct disk_image *disk, u64 sector, 92 const struct iovec *iov, int iovcount, void *param); 93 ssize_t raw_image__write_mmap(struct disk_image *disk, u64 sector, 94 const struct iovec *iov, int iovcount, void *param); 95 int raw_image__close(struct disk_image *disk); 96 void disk_image__set_callback(struct disk_image *disk, void (*disk_req_cb)(void *param, long len)); 97 #endif /* KVM__DISK_IMAGE_H */ 98