feat: simple read/write lock implementation

[lunaix-os.git] / lunaix-os / kernel / fs / fs_export.c

diff --git a/lunaix-os/kernel/fs/fs_export.c b/lunaix-os/kernel/fs/fs_export.c
new file mode 100644 (file)
index 0000000..13d6557
--- /dev/null
+++ b/lunaix-os/kernel/fs/fs_export.c
@@ -0,0 +1,47 @@
+#include <lunaix/foptions.h>
+#include <lunaix/fs.h>
+#include <lunaix/fs/twifs.h>
+
+extern struct llist_header all_mnts;
+
+void
+__mount_read(struct twimap* map)
+{
+    char path[512];
+    struct v_mount* mnt = twimap_index(map, struct v_mount*);
+    size_t len = vfs_get_path(mnt->mnt_point, path, 511, 0);
+    path[len] = '\0';
+    twimap_printf(map, "%s at %s", mnt->super_block->fs->fs_name.value, path);
+    if ((mnt->flags & MNT_RO)) {
+        twimap_printf(map, ", ro");
+    } else {
+        twimap_printf(map, ", rw");
+    }
+    twimap_printf(map, "\n");
+}
+
+int
+__mount_next(struct twimap* map)
+{
+    struct v_mount* mnt = twimap_index(map, struct v_mount*);
+    if (mnt->list.next == &all_mnts) {
+        return 0;
+    }
+    map->index = container_of(mnt->list.next, struct v_mount, list);
+    return 1;
+}
+
+void
+__mount_reset(struct twimap* map)
+{
+    map->index = container_of(all_mnts.next, struct v_mount, list);
+}
+
+void
+vfs_export_attributes()
+{
+    struct twimap* map = twifs_mapping(NULL, NULL, "mounts");
+    map->read = __mount_read;
+    map->go_next = __mount_next;
+    map->reset = __mount_reset;
+}
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