key_copy(9)

🎀 key_copy(9) 🎀

okay so bestie, welcome to the Kernel API Manual ✨ this one's a tiny little legend from the UBIFS corner of the kernel, and it is literally one job: copy a key. that's it. that's the whole vibe. no cap. 💅

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🌸 NAME 🌸

key_copy — copy a key. 🫶

like, take a key and make another key that's the same key. iconic behaviour, honestly.

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✨ SYNOPSIS ✨

void key_copy (const struct ubifs_info *c , const union ubifs_key *from
, union ubifs_key *to );

look at her. she returns void, she takes three things, she does not miss. 👑

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💖 ARGUMENTS 💖

• c — the UBIFS file-system description object 🦋 (yes bestie, the whole filesystem's little info blob, she needs it)
• from — the key to copy from 🎀 (the original, the main character, the source of truth)
• to — the key to copy to 💫 (the destination, the one getting the glow-up)

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🔥 SEE ALSO 🔥

Kernel file ./fs/ubifs/key.h — and omg the friend group is huge, get comfy 🍓:

• 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_hash_flash(9)
• key_block(9)
• key_block_flash(9)
• key_read(9)
• key_write(9)
• key_write_idx(9)
• keys_cmp(9)
• keys_eq(9)
• is_hash_key(9)
• key_max_inode_size(9)

every single one of them. no skips, no cuts, we support the whole squad 💜

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and that's the page, bestie!! mwah 💋 this gem lives in ./fs/ubifs and it's stamped October 2026 — go forth and copy those keys, you absolute icon 🌈⭐