validate_completed_page(9)

💅 validate_completed_page(9) 💅

okay bestie, welcome to the Kernel API Manual page for validate_completed_page(9). This is the little sanity check for a page completion that's being freed to the cache: it checks that the completion referred to a valid page and that the page is in a valid state. No cap, that's the whole assignment. 🫶

🎀 NAME 🎀

validate_completed_page — check that a page completion which is being freed to the cache referred to a valid page and is in a valid state. It's giving "validity check before it goes back to the cache" energy. 💖

✨ SYNOPSIS ✨

int validate_completed_page (struct vdo_page_completion *completion ,
bool writable );

💅 ARGUMENTS 💅

• completion — the page completion to check. It's the struct vdo_page_completion * under inspection, bestie. 🔍
• writable — whether a writable page is required. It's a bool, so yes/no, writable or not, periodt. 🦋

🔥 RETURN 🔥

VDO_SUCCESS if the page was valid, otherwise as error. So valid page? You get VDO_SUCCESS. Not valid? It's giving error instead. That's the return tea. 🍓

👑 SEE ALSO 👑

Kernel file ./drivers/md/dm-vdo/block-map.c — and the whole block-map friend group is here too:

• 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), 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), vdo_find_block_map_slot(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)

Cute sign-off: this page comes from source/version ./drivers/md/dm-vdo, dated October 2026. Stay valid, bestie 💜✨