generic_ci_d_hash(9)

💅 generic_ci_d_hash — okay so lemme tell you about this one

Bestie, this is a 9 page straight out of the Kernel API Manual, and the function is generic_ci_d_hash. Literally what it says on the tin: it's the generic d_hash implementation for casefolding filesystems. Casefolding girlies stay winning 💖

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✨ SYNOPSIS ✨

int generic_ci_d_hash (const struct dentry *dentry , struct qstr *str );

That's the whole mood. Two args in, an int out, no drama 🌸

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🎀 ARGUMENTS 🎀

• dentry — the dentry of the parent directory. Yep, the parent, not the thing itself, don't come for me 🙈
• str — the qstr of the name whose hash we should fill in. That's the whole job: fill in the hash, slay, done ✨

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🔥 RETURN 🔥

• 0 — hash was successful or unchanged. Both are a win, no notes 💅
• -EINVAL — an error happened. Not iconic, but it's honest 😭

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🦋 SEE ALSO 🦋

The kernel file is ./fs/libfs.c, and it is packed with friends. Go say hi, iykyk:

• simple_offset_init(9)
• simple_offset_add(9)
• simple_offset_remove(9)
• simple_offset_rename(9)
• simple_offset_rename_exchange(9)
• simple_offset_destroy(9)
• offset_dir_llseek(9)
• offset_readdir(9)
• simple_rename_timestamp(9)
• simple_setattr(9)
• simple_write_end(9)
• simple_read_from_buffer(9)
• simple_write_to_buffer(9)
• memory_read_from_buffer(9)
• generic_encode_ino32_fh(9)
• generic_fh_to_dentry(9)
• generic_fh_to_parent(9)
• simple_fsync_noflush(9)
• simple_fsync(9)
• generic_check_addressable(9)
• simple_get_link(9)
• generic_ci_d_compare(9)
• generic_ci_match(9)
• generic_set_sb_d_ops(9)
• inode_maybe_inc_iversion(9)
• inode_query_iversion(9)
• simple_inode_init_ts(9)
• path_from_stashed(9)
• simple_start_creating(9)

Like, that's a whole group chat right there. Main character energy from libfs.c fr fr 👑

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no cap: this lives in ./fs, and the page is dated October 2026. Kernel API Manual behaviour, periodt 🫶

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okay that's the page, mwah 💋 — signed, your fav casefolding correspondent, dropping this from ./fs, October 2026, source-and-version style, generic_ci_d_hash(9) icon behaviour only 🌈⭐