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
read_part_sector(struct parsed_partitions * state,sector_t n,Sector * p)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
put_partition(struct parsed_partitions * p,int n,sector_t from,sector_t size)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