vdo_find_block_map_slot(9)

💖 NAME 💖

hey bestie! welcome to vdo_find_block_map_slot(9) from the Kernel API Manual ✨ this one is literally here to find the block map slot where the block map entry for a data_vio lives, and then cache that result right in the data_vio. lowkey iconic 💅

✨ SYNOPSIS ✨

void vdo_find_block_map_slot (struct data_vio *data_vio );

🎀 ARGUMENTS 🎀

• data_vio — the data vio. that’s the one and only arg, bestie 🫶

🦋 DESCRIPTION 🦋

okay so here’s the vibe: this function finds the block map slot that holds the block map entry for a data_vio, and it caches that result inside the data_vio itself. no cap.

also, all ancestors in the tree will be allocated or loaded, as needed. that part is important, so don’t skip it 😭

🌸 SEE ALSO 🌸

Kernel file ./drivers/md/dm-vdo/block-map.c, Block map eras(9), initialize_info(9), allocate_cache_components(9), assert_on_cache_thread(9), get_page_state_name(9), update_counter(9), set_info_state(9), find_free_page(9), find_page(9), select_lru_page(9), complete_with_page(9), complete_waiter_with_error(9), complete_waiter_with_page(9), distribute_page_over_waitq(9), set_persistent_error(9), validate_completed_page(9), handle_load_error(9), page_is_loaded(9), handle_rebuild_read_error(9), launch_page_load(9), schedule_page_save(9), launch_page_save(9), completion_needs_page(9), allocate_free_page(9), discard_a_page(9), discard_page_if_needed(9), write_has_finished(9), handle_page_write_error(9), page_is_written_out(9), write_pages(9), vdo_release_page_completion(9), vdo_get_page(9), vdo_request_page_write(9), vdo_get_cached_page(9), vdo_invalidate_page_cache(9), get_tree_page_by_index(9), in_cyclic_range(9), is_not_older(9), add_to_dirty_lists(9), make_forest(9), replace_forest(9), finish_cursor(9), continue_traversal(9), finish_traversal_load(9), traverse(9), launch_cursor(9), compute_boundary(9), vdo_traverse_forest(9), initialize_block_map_zone(9), clear_mapped_location(9), set_mapped_location(9).

ngl this SEE ALSO list is long, but it’s iconic and every single ref is above — no skips 💀

source/version: ./drivers/md/dm-vdo · date: October 2026 · page: vdo_find_block_map_slot(9) — made with 💖 and zero skips, bye bestie 🫶