block/partitions/check.h

   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  */
   9 struct 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;
  19         int next;
  20         int limit;
  21         bool access_beyond_eod;
  22         char *pp_buf;
  23 };
  24
  25 void free_partitions(struct parsed_partitions *state);
  26
  27 struct parsed_partitions *
  28 check_partition(struct gendisk *, struct block_device *);
  29
  30 static inline void *read_part_sector(struct parsed_partitions *state,
  31                                      sector_t n, Sector *p)
  32 {
  33         if (n >= get_capacity(state->bdev->bd_disk)) {
  34                 state->access_beyond_eod = true;
  35                 return NULL;
  36         }
  37         return read_dev_sector(state->bdev, n, p);
  38 }
  39
  40 static inline void
  41 put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size)
  42 {
  43         if (n < p->limit) {
  44                 char tmp[1 + BDEVNAME_SIZE + 10 + 1];
  45
  46                 p->parts[n].from = from;
  47                 p->parts[n].size = size;
  48                 snprintf(tmp, sizeof(tmp), " %s%d", p->name, n);
  49                 strlcat(p->pp_buf, tmp, PAGE_SIZE);
  50         }
  51 }
  52
  53 extern int warn_no_part;
  54