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