kernfs_add_one(9)

💅 kernfs_add_one(9) — Kernel API Manual 💅

Welcome to the Kernel API Manual, bestie — this is the kernfs_add_one(9) page, and we're gonna make it make sense. ✨

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🌸 NAME 🌸

kernfs_add_one — add a kernfs_node to its parent without warning. No cap, that's literally the whole vibe. 🎀

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✨ SYNOPSIS ✨

Okay so the signature is giving:

int kernfs_add_one (struct kernfs_node *kn );

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🎀 ARGUMENTS 🎀

• kn — the kernfs_node to be added. That's the whole argument, bestie. 🫶

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💖 DESCRIPTION 💖

Before you call this, you — the caller — must already have initialized kn->parent. This function is not gonna do that for you, fr fr. 🙈

If kn is a directory, this function increments nlink of the parent's inode. It also links kn into the children list of the parent. Slay. 💅

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🌈 RETURN 🌈

• 0 — success, iconic. 👑
• -EEXIST — an entry with the given name already exists. Duplicate detected, no thank you. 💀

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🦋 SEE ALSO 🦋

Kernel file ./fs/kernfs/dir.c — that's where this lives. 🧚

• kernfs_path_from_node_locked(9)
• kernfs_name(9)
• kernfs_path_from_node(9)
• pr_cont_kernfs_name(9)
• pr_cont_kernfs_path(9)
• kernfs_get_parent(9)
• kernfs_name_hash(9)
• kernfs_link_sibling(9)
• kernfs_unlink_sibling(9)
• kernfs_get_active(9)
• kernfs_put_active(9)
• kernfs_drain(9)
• kernfs_get(9)
• kernfs_put(9)
• kernfs_node_from_dentry(9)
• kernfs_find_ns(9)
• kernfs_find_and_get_ns(9)
• kernfs_walk_and_get_ns(9)
• kernfs_create_root(9)
• kernfs_destroy_root(9)
• kernfs_root_to_node(9)
• kernfs_create_dir_ns(9)
• kernfs_create_empty_dir(9)
• kernfs_next_descendant_post(9)
• kernfs_activate(9)
• kernfs_show(9)
• kernfs_remove(9)
• kernfs_break_active_protection(9)
• kernfs_unbreak_active_protection(9)
• kernfs_remove_self(9)
• kernfs_remove_by_name_ns(9)
• kernfs_rename_ns(9)

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Cute lil sign-off: this page is from ./fs/kernfs, dated October 2026, and it's serving kernfs_add_one(9). Byeee, ily, go initialize your parents. 💖🦋