Linux核心数据结构--gendisk

包含关于某个硬盘的信息。用于磁盘初始化与分区检查时。

struct hd_struct {

    long start_sect;

    long nr_sects;

};



struct gendisk {
    int major;              /* major number of driver */

    const char *major_name; /* name of major driver */

    int minor_shift;         /* number of times minor is shifted to

                                get real minor */

    int max_p;               /* maximum partitions per device */

    int max_nr;              /* maximum number of real devices */



    void (*init)(struct gendisk *);

                             /* Initialization called before we

                                do our thing */

    struct hd_struct *part;  /* partition table */

    int *sizes;              /* device size in blocks, copied to

                                blk_size[] */

    int nr_real;             /* number of real devices */



   void *real_devices;      /* internal use */

    struct gendisk *next;

};