1 #include <linux/pagemap.h> 2 #include <linux/blkdev.h> 3 #include <linux/genhd.h> 4 5 /* 6 * add_gd_partition adds a partitions details to the devices partition 7 * description. 8 */ 9 struct parsed_partitions { 10 struct block_device *bdev; 11 char name[BDEVNAME_SIZE]; 12 struct { 13 sector_t from; 14 sector_t size; 15 int flags; 16 bool has_info; 17 struct partition_meta_info info; 18 } *parts; 19 int next; 20 int limit; 21 bool access_beyond_eod; 22 char *pp_buf; 23 }; 24 25 void free_partitions(struct parsed_partitions *state); 26 27 struct parsed_partitions * 28 check_partition(struct gendisk *, struct block_device *); 29 30 static inline void *read_part_sector(struct parsed_partitions *state, 31 sector_t n, Sector *p) 32 { 33 if (n >= get_capacity(state->bdev->bd_disk)) { 34 state->access_beyond_eod = true; 35 return NULL; 36 } 37 return read_dev_sector(state->bdev, n, p); 38 } 39 40 static inline void 41 put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size) 42 { 43 if (n < p->limit) { 44 char tmp[1 + BDEVNAME_SIZE + 10 + 1]; 45 46 p->parts[n].from = from; 47 p->parts[n].size = size; 48 snprintf(tmp, sizeof(tmp), " %s%d", p->name, n); 49 strlcat(p->pp_buf, tmp, PAGE_SIZE); 50 } 51 } 52 53 extern int warn_no_part; 54 55