tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
9struct 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
25static inline void *read_part_sector(struct parsed_partitions *state,
26 sector_t n, Sector *p)
27{
28 if (n >= get_capacity(state->bdev->bd_disk)) {
29 state->access_beyond_eod = true;
30 return NULL;
31 }
32 return read_dev_sector(state->bdev, n, p);
33}
34
35static inline void
36put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size)
37{
38 if (n < p->limit) {
39 char tmp[1 + BDEVNAME_SIZE + 10 + 1];
40
41 p->parts[n].from = from;
42 p->parts[n].size = size;
43 snprintf(tmp, sizeof(tmp), " %s%d", p->name, n);
44 strlcat(p->pp_buf, tmp, PAGE_SIZE);
45 }
46}
47
48extern int warn_no_part;
49