1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #include <linux/pagemap.h> 3 #include <linux/blkdev.h> 4 #include <linux/genhd.h> 5 6 /* 7 * add_gd_partition adds a partitions details to the devices partition 8 * description. 9 */ 10 struct parsed_partitions { 11 struct block_device *bdev; 12 char name[BDEVNAME_SIZE]; 13 struct { 14 sector_t from; 15 sector_t size; 16 int flags; 17 bool has_info; 18 struct partition_meta_info info; 19 } *parts; 20 int next; 21 int limit; 22 bool access_beyond_eod; 23 char *pp_buf; 24 }; 25 26 void free_partitions(struct parsed_partitions *state); 27 28 struct parsed_partitions * 29 check_partition(struct gendisk *, struct block_device *); 30 31 static inline void *read_part_sector(struct parsed_partitions *state, 32 sector_t n, Sector *p) 33 { 34 if (n >= get_capacity(state->bdev->bd_disk)) { 35 state->access_beyond_eod = true; 36 return NULL; 37 } 38 return read_dev_sector(state->bdev, n, p); 39 } 40 41 static inline void 42 put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size) 43 { 44 if (n < p->limit) { 45 char tmp[1 + BDEVNAME_SIZE + 10 + 1]; 46 47 p->parts[n].from = from; 48 p->parts[n].size = size; 49 snprintf(tmp, sizeof(tmp), " %s%d", p->name, n); 50 strlcat(p->pp_buf, tmp, PAGE_SIZE); 51 } 52 } 53 54 extern int warn_no_part; 55 56