hash_lock_key(9)

💅 hash_lock_key(9) — a kernel API moment

okay so bestie, welcome to the hash_lock_key(9) page, fresh out of the Kernel API Manual ✨ this one is short and sweet, like a lil snack before the main character pages. grab a boba, we're reading it together 🧋💖

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🌸 NAME 🌸

hash_lock_key — returns hash_lock's record name as a hash code. literally its whole personality 💅

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🦋 SYNOPSIS 🦋

u64 hash_lock_key (struct hash_lock *lock );

that's it. one argument. one u64 back. no cap 🫶

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🎀 ARGUMENTS 🎀

• lock — the hash lock. that's the one. the icon. the whole input 👑

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✨ RETURN ✨

it hands you back the key to use for the int map 🔑 like, the value you're gonna index with. that's the vibe check result ⭐

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💜 SEE ALSO 💜

so like, the friend group here is huge, and honestly they all ate. it's the Kernel file ./drivers/md/dm-vdo/dedupe.c, starting with:

• Introduction(9)

and then the entire squad, in the order the page lists them 🐛:

• return_hash_lock_to_pool(9)
• vdo_get_duplicate_lock(9)
• get_hash_lock_state_name(9)
• assert_hash_lock_agent(9)
• set_duplicate_lock(9)
• dequeue_lock_waiter(9)
• set_hash_lock(9)
• exit_hash_lock(9)
• set_duplicate_location(9)
• retire_lock_agent(9)
• wait_on_hash_lock(9)
• abort_waiter(9)
• start_bypassing(9)
• finish_unlocking(9)
• unlock_duplicate_pbn(9)
• start_unlocking(9)
• finish_updating(9)
• start_updating(9)
• finish_deduping(9)
• acquire_lock(9)
• enter_forked_lock(9)
• fork_hash_lock(9)
• launch_dedupe(9)
• start_deduping(9)
• increment_stat(9)
• finish_verifying(9)
• start_verifying(9)
• finish_locking(9)
• lock_duplicate_pbn(9)
• start_locking(9)
• finish_writing(9)
• select_writing_agent(9)
• start_writing(9)
• finish_querying(9)
• start_querying(9)
• report_bogus_lock_state(9)
• vdo_continue_hash_lock(9)
• is_hash_collision(9)
• vdo_acquire_hash_lock(9)
• vdo_release_hash_lock(9)
• transfer_allocation_lock(9)
• vdo_share_compressed_write_lock(9)
• report_dedupe_timeouts(9)
• finish_index_operation(9)
• check_for_drain_complete(9)
• vdo_make_hash_zones(9)
• vdo_free_hash_zones(9)
• suspend_index(9)
• resume_index(9)
• vdo_resume_hash_zones(9)
• get_hash_zone_statistics(9)
• vdo_get_dedupe_statistics(9)
• vdo_select_hash_zone(9)
• dump_hash_lock(9)
• dump_hash_zone(9)
• vdo_dump_hash_zones(9)
• acquire_context(9)

like… the way that list keeps going?? iconic behavior honestly 😭👑

ngl bestie, if you were hoping for OPTIONS or a big dramatic DESCRIPTION — this page doesn't have them. it's just name, synopsis, argument, return, and the world's longest see-also. and that's valid 💀

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and that's the page!! mwah 🫶 this lil slice of the Kernel API Manual out of ./drivers/md/dm-vdo was brought to you by October 2026 — go read the whole hash lock friend group, i'm obsessed 🌈💖✨