handle_rebuild_read_error(9)

🌸 handle_rebuild_read_error(9) — the Kernel API Manual moment 💅

okay so bestie, we're in the Kernel API Manual and today's main character is handle_rebuild_read_error — say it with me, it's giving "I handle a read error during a read-only rebuild" energy. no cap, that's literally the whole job. 🔥

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✨ NAME ✨

handle_rebuild_read_error — Handle a read error during a read-only rebuild. periodt. 🎀

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💖 SYNOPSIS 💖

void handle_rebuild_read_error (struct vdo_completion *completion );

like, it returns void, it takes one thing, it's not complicated and we love that for it. 🦋

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🌈 ARGUMENTS 🌈

• completion — The page load completion. that's the whole thing, bestie, it's the page load completion and it's showing up to do its little job 🫶

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👑 SEE ALSO 👑

first off, the source file, in case you wanna go read the real thing (iconic behavior, honestly):

Kernel file ./drivers/md/dm-vdo/block-map.c

and now the friend group — literally everyone in this roster, no one gets left out, we don't do that here 💜

• 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)
• 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)

like… the way that list just keeps going? ate. 💅

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and that's the whole page, bestie — short, sweet, and to the point, which honestly is a vibe. this little love letter lives in ./drivers/md/dm-vdo and it's dated October 2026, so mark your calendars. go forth and handle those read errors during a read-only rebuild. slay. ⭐🌸💖