19f532d00SPekka Enberg #ifndef KVM__DISK_IMAGE_H 29f532d00SPekka Enberg #define KVM__DISK_IMAGE_H 39f532d00SPekka Enberg 4c9310ac4SAsias He #include "kvm/read-write.h" 5c9310ac4SAsias He #include "kvm/util.h" 6c9310ac4SAsias He 73fdf659dSSasha Levin #include <linux/types.h> 8c9310ac4SAsias He #include <linux/fs.h> /* for BLKGETSIZE64 */ 9c9310ac4SAsias He #include <sys/ioctl.h> 10c9310ac4SAsias He #include <sys/types.h> 11c9310ac4SAsias He #include <sys/mman.h> 12c9310ac4SAsias He #include <sys/stat.h> 139ac38fe1SSasha Levin #include <stdbool.h> 1470b53f25SSasha Levin #include <sys/uio.h> 15c9310ac4SAsias He #include <stdbool.h> 16c9310ac4SAsias He #include <stddef.h> 17c9310ac4SAsias He #include <stdlib.h> 1829084a74SPrasad Joshi #include <unistd.h> 19c9310ac4SAsias He #include <fcntl.h> 209f532d00SPekka Enberg 212924f993SAsias He #define SECTOR_SHIFT 9 222924f993SAsias He #define SECTOR_SIZE (1UL << SECTOR_SHIFT) 232924f993SAsias He 24*38c396e4SSasha Levin enum { 25*38c396e4SSasha Levin DISK_IMAGE_REGULAR, 26*38c396e4SSasha Levin DISK_IMAGE_MMAP, 27*38c396e4SSasha Levin }; 28*38c396e4SSasha Levin 29c1ed214eSPrasad Joshi #define MAX_DISK_IMAGES 4 307d22135fSAsias He 31499f3bedSPekka Enberg struct disk_image; 32499f3bedSPekka Enberg 33499f3bedSPekka Enberg struct disk_image_operations { 3472133dd2SAsias He /* 3572133dd2SAsias He * The following two are used for reading or writing with a single buffer. 3672133dd2SAsias He * The implentation can use readv/writev or memcpy. 3772133dd2SAsias He */ 3872133dd2SAsias He ssize_t (*read_sector)(struct disk_image *disk, u64 sector, void *dst, u32 dst_len); 3972133dd2SAsias He ssize_t (*write_sector)(struct disk_image *disk, u64 sector, void *src, u32 src_len); 4072133dd2SAsias He /* 4172133dd2SAsias He * The following two are used for reading or writing with multiple buffers. 4272133dd2SAsias He * The implentation can use readv/writev or memcpy. 4372133dd2SAsias He */ 4443835ac9SSasha Levin ssize_t (*read_sector_iov)(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 4543835ac9SSasha Levin ssize_t (*write_sector_iov)(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 4629084a74SPrasad Joshi int (*flush)(struct disk_image *disk); 4772133dd2SAsias He int (*close)(struct disk_image *disk); 48499f3bedSPekka Enberg }; 49499f3bedSPekka Enberg 509f532d00SPekka Enberg struct disk_image { 519f532d00SPekka Enberg int fd; 523fdf659dSSasha Levin u64 size; 53499f3bedSPekka Enberg struct disk_image_operations *ops; 54499f3bedSPekka Enberg void *priv; 559f532d00SPekka Enberg }; 569f532d00SPekka Enberg 579ac38fe1SSasha Levin struct disk_image *disk_image__open(const char *filename, bool readonly); 58c1ed214eSPrasad Joshi struct disk_image **disk_image__open_all(const char **filenames, bool *readonly, int count); 597d22135fSAsias He struct disk_image *disk_image__new(int fd, u64 size, struct disk_image_operations *ops, int mmap); 6072133dd2SAsias He int disk_image__close(struct disk_image *disk); 619df47d00SPrasad Joshi void disk_image__close_all(struct disk_image **disks, int count); 62fda63751SAsias He int disk_image__flush(struct disk_image *disk); 63b8861977SAsias He ssize_t disk_image__read(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 64b8861977SAsias He ssize_t disk_image__write(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 65ff6462e8SSasha Levin ssize_t disk_image__get_serial(struct disk_image *disk, void *buffer, ssize_t *len); 6670b53f25SSasha Levin 67c9310ac4SAsias He struct disk_image *raw_image__probe(int fd, struct stat *st, bool readonly); 68c9310ac4SAsias He struct disk_image *blkdev__probe(const char *filename, struct stat *st); 69c9310ac4SAsias He 70708dc6cbSAsias He ssize_t raw_image__read_sector_iov(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 71708dc6cbSAsias He ssize_t raw_image__write_sector_iov(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 7287ee33c8SAsias He ssize_t raw_image__read_sector(struct disk_image *disk, u64 sector, void *dst, u32 dst_len); 7387ee33c8SAsias He ssize_t raw_image__write_sector(struct disk_image *disk, u64 sector, void *src, u32 src_len); 7487ee33c8SAsias He int raw_image__close(struct disk_image *disk); 75708dc6cbSAsias He 769f532d00SPekka Enberg #endif /* KVM__DISK_IMAGE_H */ 77