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