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

[lunaix-os.git] / lunaix-os / kernel / mm / cake_export.c

diff --git a/lunaix-os/kernel/mm/cake_export.c b/lunaix-os/kernel/mm/cake_export.c
new file mode 100644 (file)
index 0000000..276e823
--- /dev/null
+++ b/lunaix-os/kernel/mm/cake_export.c
@@ -0,0 +1,108 @@
+#include <lunaix/fs/twifs.h>
+#include <lunaix/mm/cake.h>
+
+extern struct llist_header piles;
+
+int
+__cake_stat_gonext(struct twimap* map)
+{
+    struct cake_pile* pile = twimap_index(map, struct cake_pile*);
+    if (pile->piles.next == &piles) {
+        return 0;
+    }
+    map->index = list_entry(pile->piles.next, struct cake_pile, piles);
+    return 1;
+}
+
+void
+__cake_stat_reset(struct twimap* map)
+{
+    map->index = container_of(piles.next, struct cake_pile, piles);
+}
+
+void
+__cake_rd_stat(struct twimap* map)
+{
+    struct cake_pile* pos = twimap_index(map, struct cake_pile*);
+    twimap_printf(map,
+                  "%s %d %d %d %d\n",
+                  pos->pile_name,
+                  pos->cakes_count,
+                  pos->pg_per_cake,
+                  pos->pieces_per_cake,
+                  pos->alloced_pieces);
+}
+
+void
+__cake_rd_psize(struct twimap* map)
+{
+    struct cake_pile* pile = twimap_data(map, struct cake_pile*);
+    twimap_printf(map, "%u", pile->piece_size);
+}
+
+void
+__cake_rd_ccount(struct twimap* map)
+{
+    struct cake_pile* pile = twimap_data(map, struct cake_pile*);
+    twimap_printf(map, "%u", pile->cakes_count);
+}
+
+void
+__cake_rd_alloced(struct twimap* map)
+{
+    struct cake_pile* pile = twimap_data(map, struct cake_pile*);
+    twimap_printf(map, "%u", pile->alloced_pieces);
+}
+
+void
+__cake_rd_ppc(struct twimap* map)
+{
+    struct cake_pile* pile = twimap_data(map, struct cake_pile*);
+    twimap_printf(map, "%u", pile->pieces_per_cake);
+}
+
+void
+__cake_rd_ppg(struct twimap* map)
+{
+    struct cake_pile* pile = twimap_data(map, struct cake_pile*);
+    twimap_printf(map, "%u", pile->pg_per_cake);
+}
+
+void
+cake_export_pile(struct twifs_node* root, struct cake_pile* pile)
+{
+    struct twifs_node* pile_rt = twifs_dir_node(root, pile->pile_name);
+
+    struct twimap* map = twifs_mapping(pile_rt, pile, "piece_size");
+    map->read = __cake_rd_psize;
+
+    map = twifs_mapping(pile_rt, pile, "cake_count");
+    map->read = __cake_rd_ccount;
+
+    map = twifs_mapping(pile_rt, pile, "grabbed");
+    map->read = __cake_rd_alloced;
+
+    map = twifs_mapping(pile_rt, pile, "pieces_per_cake");
+    map->read = __cake_rd_ppc;
+
+    map = twifs_mapping(pile_rt, pile, "page_per_cake");
+    map->read = __cake_rd_ppg;
+}
+
+void
+cake_export()
+{
+    struct twifs_node* cake_root = twifs_dir_node(NULL, "cake");
+
+    struct twimap* map = twifs_mapping(cake_root, NULL, "pinkiepie");
+    map->reset = __cake_stat_reset;
+    map->go_next = __cake_stat_gonext;
+    map->read = __cake_rd_stat;
+    __cake_stat_reset(map);
+
+    struct cake_pile *pos, *n;
+    llist_for_each(pos, n, &piles, piles)
+    {
+        cake_export_pile(cake_root, pos);
+    }
+}
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