key_hash_flash(9)

💖 key_hash_flash(9) 💖

okay so first things first, bestie: this is a page from the Kernel API Manual, and the star of the show is key_hash_flash(9). she's a little function, she does one job, and she does it flawlessly. let's get into it ✨

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🌸 NAME 🌸

key_hash_flash — get the directory entry hash from an on-flash formatted key. that's it. that's the whole vibe. no cap. 🎀

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🦋 SYNOPSIS 🦋

uint32_t key_hash_flash (const struct ubifs_info *c , const void *k );

look at her. so clean. so iconic. returns a uint32_t, takes two things, zero drama 💅

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🫶 ARGUMENTS 🫶

• c — the UBIFS file-system description object. like, the whole context of the filesystem. she's the main character energy that makes everything else make sense 🗂️
• k — the key you want to get the hash from. hand her over, she's getting hashed 🔥

ngl both of these are const, so like… nobody's getting modified here. it's giving respectful. it's giving read-only. we love that for us 🙈

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🌈 SEE ALSO 🌈

okay this is the part where the page pulls out her entire friend group and honestly? the roster ate. every single one of these, in this exact order:

key_mask_hash(9), key_r5_hash(9), key_test_hash(9), ino_key_init(9), ino_key_init_flash(9), lowest_ino_key(9), highest_ino_key(9), dent_key_init(9), dent_key_init_hash(9), dent_key_init_flash(9), lowest_dent_key(9), xent_key_init(9), xent_key_init_flash(9), lowest_xent_key(9), data_key_init(9), highest_data_key(9), trun_key_init(9), invalid_key_init(9), key_type(9), key_type_flash(9), key_inum(9), key_inum_flash(9), key_hash(9), key_block(9), key_block_flash(9), key_read(9), key_write(9), key_write_idx(9), key_copy(9), keys_cmp(9), keys_eq(9), is_hash_key(9), key_max_inode_size(9)

and where do they all live? in the kernel file ./fs/ubifs/key.h — that's the group chat, that's the source, go say hi 💜

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⭐ and that's the page!! shoutout to ./fs/ubifs, the source of all this wisdom, dated October 2026 — write it in your calendar bestie 🗓️✨ bye, ily, go hash responsibly 💖🌸🦋