LXR linux/block/partitions/check.h

   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 */
  10struct 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
  26void free_partitions(struct parsed_partitions *state);
  27
  28struct parsed_partitions *
  29check_partition(struct gendisk *, struct block_device *);
  30
  31static 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
  41static inline void
  42put_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
  54extern int warn_no_part;
  55
  56