feat: (twimap) provide an easy way for mapping kernel objects into filesystem

[lunaix-os.git] / lunaix-os / kernel / block / blk_mapping.c

diff --git a/lunaix-os/kernel/block/blk_mapping.c b/lunaix-os/kernel/block/blk_mapping.c
new file mode 100644 (file)
index 0000000..f6d1346
--- /dev/null
+++ b/lunaix-os/kernel/block/blk_mapping.c
@@ -0,0 +1,111 @@
+#include <lunaix/block.h>
+#include <lunaix/fs/twifs.h>
+
+static struct twifs_node* blk_root;
+
+void
+blk_mapping_init()
+{
+    blk_root = twifs_dir_node(NULL, "block");
+}
+
+void
+__blk_rd_size(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    size_t secsize = bdev->hd_dev->block_size;
+    twimap_printf(map, "%u", (bdev->end_lba - bdev->base_lba) * secsize);
+}
+
+void
+__blk_rd_secsize(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    size_t secsize = bdev->hd_dev->block_size;
+    twimap_printf(map, "%u", secsize);
+}
+
+void
+__blk_rd_range(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    twimap_printf(
+      map, "%u,%u", (uint32_t)bdev->base_lba, (uint32_t)bdev->end_lba);
+}
+
+void
+__blk_rd_model(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    twimap_printf(map, "%s", bdev->hd_dev->model);
+}
+
+void
+__blk_rd_serial(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    twimap_printf(map, "%s", bdev->hd_dev->serial_num);
+}
+
+void
+__blk_rd_status(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    twimap_printf(map, "%p", bdev->hd_dev->last_result.status);
+}
+
+void
+__blk_rd_error(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    twimap_printf(map, "%p", bdev->hd_dev->last_result.error);
+}
+
+void
+__blk_rd_sense_key(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    twimap_printf(map, "%p", bdev->hd_dev->last_result.sense_key);
+}
+
+void
+__blk_rd_wwid(struct twimap* map)
+{
+    struct block_dev* bdev = twimap_data(map, struct block_dev*);
+    uint32_t h = bdev->hd_dev->wwn >> 32;
+    uint32_t l = (uint32_t)bdev->hd_dev->wwn;
+    twimap_printf(map, "%x%x", h, l);
+}
+
+void
+blk_set_blkmapping(struct block_dev* bdev)
+{
+    struct twifs_node* dev_root = twifs_dir_node(blk_root, bdev->bdev_id);
+
+    struct twimap* map = twifs_mapping(dev_root, bdev, "size");
+    map->read = __blk_rd_size;
+
+    map = twifs_mapping(dev_root, bdev, "secsize");
+    map->read = __blk_rd_secsize;
+
+    map = twifs_mapping(dev_root, bdev, "range");
+    map->read = __blk_rd_range;
+
+    map = twifs_mapping(dev_root, bdev, "model");
+    map->read = __blk_rd_model;
+
+    map = twifs_mapping(dev_root, bdev, "serial");
+    map->read = __blk_rd_serial;
+
+    map = twifs_mapping(dev_root, bdev, "status");
+    map->read = __blk_rd_status;
+
+    map = twifs_mapping(dev_root, bdev, "error");
+    map->read = __blk_rd_error;
+
+    map = twifs_mapping(dev_root, bdev, "sense-key");
+    map->read = __blk_rd_sense_key;
+
+    map = twifs_mapping(dev_root, bdev, "wwid");
+    map->read = __blk_rd_wwid;
+}
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