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  */
  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
  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
  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