[mirror_ubuntu-bionic-kernel.git] / block / partitions / check.h

/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/pagemap.h>
#include <linux/blkdev.h>
#include <linux/genhd.h>

/*
 * add_gd_partition adds a partitions details to the devices partition
 * description.
 */
struct parsed_partitions {
	struct block_device *bdev;
	char name[BDEVNAME_SIZE];
	struct {
		sector_t from;
		sector_t size;
		int flags;
		bool has_info;
		struct partition_meta_info info;
	} *parts;
	int next;
	int limit;
	bool access_beyond_eod;
	char *pp_buf;
};

void free_partitions(struct parsed_partitions *state);

struct parsed_partitions *
check_partition(struct gendisk *, struct block_device *);

static inline void *read_part_sector(struct parsed_partitions *state,
				     sector_t n, Sector *p)
{
	if (n >= get_capacity(state->bdev->bd_disk)) {
		state->access_beyond_eod = true;
		return NULL;
	}
	return read_dev_sector(state->bdev, n, p);
}

static inline void
put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size)
{
	if (n < p->limit) {
		char tmp[1 + BDEVNAME_SIZE + 10 + 1];

		p->parts[n].from = from;
		p->parts[n].size = size;
		snprintf(tmp, sizeof(tmp), " %s%d", p->name, n);
		strlcat(p->pp_buf, tmp, PAGE_SIZE);
	}
}

extern int warn_no_part;
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#include <linux/pagemap.h>
1da177e4 LT	3	#include <linux/blkdev.h>
6d1d8050	4	#include <linux/genhd.h>
1da177e4 LT	5
	6	/*
	7	* add_gd_partition adds a partitions details to the devices partition
	8	* description.
	9	*/
1da177e4	10	struct parsed_partitions {
1493bf21	11	struct block_device *bdev;
1da177e4 LT	12	char name[BDEVNAME_SIZE];
	13	struct {
	14	sector_t from;
	15	sector_t size;
	16	int flags;
6d1d8050 WD	17	bool has_info;
6d1d8050 WD	18	struct partition_meta_info info;
ac2e5327	19	} *parts;
1da177e4 LT	20	int next;
1da177e4 LT	21	int limit;
b403a98e	22	bool access_beyond_eod;
9c867fbe	23	char *pp_buf;
1da177e4 LT	24	};
1da177e4 LT	25
ac2e5327 ML	26	void free_partitions(struct parsed_partitions *state);
ac2e5327 ML	27
94ea4158 AV	28	struct parsed_partitions *
	29	check_partition(struct gendisk , struct block_device );
	30
1493bf21 TH	31	static inline void read_part_sector(struct parsed_partitions state,
	32	sector_t n, Sector *p)
	33	{
b403a98e TH	34	if (n >= get_capacity(state->bdev->bd_disk)) {
	35	state->access_beyond_eod = true;
	36	return NULL;
	37	}
1493bf21 TH	38	return read_dev_sector(state->bdev, n, p);
	39	}
	40
1da177e4 LT	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) {
9c867fbe AD	45	char tmp[1 + BDEVNAME_SIZE + 10 + 1];
9c867fbe AD	46
1da177e4 LT	47	p->parts[n].from = from;
1da177e4 LT	48	p->parts[n].size = size;
9c867fbe AD	49	snprintf(tmp, sizeof(tmp), " %s%d", p->name, n);
9c867fbe AD	50	strlcat(p->pp_buf, tmp, PAGE_SIZE);
1da177e4 LT	51	}
	52	}
	53
	54	extern int warn_no_part;
	55