19f532d00SPekka Enberg #ifndef KVM__DISK_IMAGE_H 29f532d00SPekka Enberg #define KVM__DISK_IMAGE_H 39f532d00SPekka Enberg 43fdf659dSSasha Levin #include <linux/types.h> 59ac38fe1SSasha Levin #include <stdbool.h> 670b53f25SSasha Levin #include <sys/uio.h> 729084a74SPrasad Joshi #include <unistd.h> 89f532d00SPekka Enberg 92924f993SAsias He #define SECTOR_SHIFT 9 102924f993SAsias He #define SECTOR_SIZE (1UL << SECTOR_SHIFT) 112924f993SAsias He 12499f3bedSPekka Enberg struct disk_image; 13499f3bedSPekka Enberg 14499f3bedSPekka Enberg struct disk_image_operations { 1543835ac9SSasha Levin int (*read_sector)(struct disk_image *disk, u64 sector, void *dst, u32 dst_len); 1643835ac9SSasha Levin int (*write_sector)(struct disk_image *disk, u64 sector, void *src, u32 src_len); 1743835ac9SSasha Levin ssize_t (*read_sector_iov)(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 1843835ac9SSasha Levin ssize_t (*write_sector_iov)(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 1929084a74SPrasad Joshi int (*flush)(struct disk_image *disk); 2043835ac9SSasha Levin void (*close)(struct disk_image *disk); 21499f3bedSPekka Enberg }; 22499f3bedSPekka Enberg 239f532d00SPekka Enberg struct disk_image { 249f532d00SPekka Enberg int fd; 253fdf659dSSasha Levin u64 size; 26499f3bedSPekka Enberg struct disk_image_operations *ops; 27499f3bedSPekka Enberg void *priv; 289f532d00SPekka Enberg }; 299f532d00SPekka Enberg 309ac38fe1SSasha Levin struct disk_image *disk_image__open(const char *filename, bool readonly); 313fdf659dSSasha Levin struct disk_image *disk_image__new(int fd, u64 size, struct disk_image_operations *ops); 323fdf659dSSasha Levin struct disk_image *disk_image__new_readonly(int fd, u64 size, struct disk_image_operations *ops); 3343835ac9SSasha Levin void disk_image__close(struct disk_image *disk); 34499f3bedSPekka Enberg 3543835ac9SSasha Levin static inline int disk_image__read_sector(struct disk_image *disk, u64 sector, void *dst, u32 dst_len) 36499f3bedSPekka Enberg { 3743835ac9SSasha Levin return disk->ops->read_sector(disk, sector, dst, dst_len); 38499f3bedSPekka Enberg } 39499f3bedSPekka Enberg 4043835ac9SSasha Levin static inline int disk_image__write_sector(struct disk_image *disk, u64 sector, void *src, u32 src_len) 41499f3bedSPekka Enberg { 4243835ac9SSasha Levin return disk->ops->write_sector(disk, sector, src, src_len); 43499f3bedSPekka Enberg } 449f532d00SPekka Enberg 45*70b0d7b0SSasha Levin ssize_t disk_image__read_sector_iov(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 46*70b0d7b0SSasha Levin ssize_t disk_image__write_sector_iov(struct disk_image *disk, u64 sector, const struct iovec *iov, int iovcount); 4770b53f25SSasha Levin 4829084a74SPrasad Joshi static inline int disk_image__flush(struct disk_image *disk) 4929084a74SPrasad Joshi { 5029084a74SPrasad Joshi if (disk->ops->flush) 5129084a74SPrasad Joshi return disk->ops->flush(disk); 5229084a74SPrasad Joshi return fsync(disk->fd); 5329084a74SPrasad Joshi } 5429084a74SPrasad Joshi 559f532d00SPekka Enberg #endif /* KVM__DISK_IMAGE_H */ 56