lunaix-os/kernel/block/blk_mapping.c

   1 #include <lunaix/block.h>
   2 #include <lunaix/fs/twifs.h>
   3
   4 static struct twifs_node* blk_root;
   5
   6 void
   7 blk_mapping_init()
   8 {
   9     blk_root = twifs_dir_node(NULL, "block");
  10 }
  11
  12 static void
  13 __twimap_read_lblk_size(struct twimap* map)
  14 {
  15     struct block_dev* bdev = twimap_data(map, struct block_dev*);
  16     size_t lblksz = bdev->blk_size;
  17     twimap_printf(map, "%u", lblksz);
  18 }
  19
  20 static void
  21 __twimap_read_name(struct twimap* map)
  22 {
  23     struct block_dev* bdev = twimap_data(map, struct block_dev*);
  24     twimap_printf(map, "%s", bdev->name);
  25 }
  26
  27 static void
  28 __twimap_read_lba_begin(struct twimap* map)
  29 {
  30     struct block_dev* bdev = twimap_data(map, struct block_dev*);
  31     twimap_printf(map, "%d", bdev->start_lba);
  32 }
  33
  34 static void
  35 __twimap_read_lba_end(struct twimap* map)
  36 {
  37     struct block_dev* bdev = twimap_data(map, struct block_dev*);
  38     twimap_printf(map, "%d", bdev->end_lba);
  39 }
  40
  41 static void
  42 __twimap_read_size(struct twimap* map)
  43 {
  44     struct block_dev* bdev = twimap_data(map, struct block_dev*);
  45     twimap_printf(
  46       map, "%u", (u32_t)(bdev->end_lba - bdev->start_lba) * bdev->blk_size);
  47 }
  48
  49 void
  50 __map_internal(struct block_dev* bdev, void* fsnode)
  51 {
  52     struct twifs_node* dev_root;
  53
  54     dev_root = (struct twifs_node*)fsnode;
  55
  56     twimap_export_value(dev_root, size,      FSACL_aR, bdev);
  57     twimap_export_value(dev_root, lblk_size, FSACL_aR, bdev);
  58     twimap_export_value(dev_root, name,      FSACL_aR, bdev);
  59     twimap_export_value(dev_root, lba_begin, FSACL_aR, bdev);
  60     twimap_export_value(dev_root, lba_end,   FSACL_aR, bdev);
  61 }
  62
  63 void
  64 blk_set_blkmapping(struct block_dev* bdev, void* fsnode)
  65 {
  66     struct twifs_node* dev_root = (struct twifs_node*)fsnode;
  67
  68     __map_internal(bdev, dev_root);
  69
  70     struct block_dev *pos, *n;
  71     llist_for_each(pos, n, &bdev->parts, parts)
  72     {
  73         struct twifs_node* part_node = twifs_dir_node(dev_root, pos->bdev_id);
  74         __map_internal(pos, part_node);
  75     }
  76 }