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[DISK_MAX_PARTS]; 19 int next; 20 int limit; 21 bool access_beyond_eod; 22 char *pp_buf; 23 }; 24 25 struct parsed_partitions * 26 check_partition(struct gendisk *, struct block_device *); 27 28 static inline void *read_part_sector(struct parsed_partitions *state, 29 sector_t n, Sector *p) 30 { 31 if (n >= get_capacity(state->bdev->bd_disk)) { 32 state->access_beyond_eod = true; 33 return NULL; 34 } 35 return read_dev_sector(state->bdev, n, p); 36 } 37 38 static inline void 39 put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size) 40 { 41 if (n < p->limit) { 42 char tmp[1 + BDEVNAME_SIZE + 10 + 1]; 43 44 p->parts[n].from = from; 45 p->parts[n].size = size; 46 snprintf(tmp, sizeof(tmp), " %s%d", p->name, n); 47 strlcat(p->pp_buf, tmp, PAGE_SIZE); 48 } 49 } 50 51 extern int warn_no_part; 52 53