kernfs_root_to_node(9)

💅 kernfs_root_to_node — the kernel API manual, bestie edition ✨

okay so real talk, this is a page from the Kernel API Manual and it's literally about one tiny function that does one tiny thing and honestly? we respect the minimalism 🎀

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✨ NAME ✨

kernfs_root_to_node — returns the kernfs_node associated with a kernfs_root 🦋

like, you give it a root, it hands you back the node. that's the whole vibe check. no cap.

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🌸 SYNOPSIS 🌸

struct kernfs_node * kernfs_root_to_node (struct kernfs_root *root );

there she is 💖 one parameter, one pointer out, absolutely no drama. signature copied exactly, don't come for me.

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🧚 ARGUMENTS 🧚

• root — the root you're using to do the lookup, bestie 🔍 that's it, that's the input. hand it a struct kernfs_root * and let it cook.

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👑 RETURN 👑

the root's kernfs_node, periodt 💅 it gives you back a pointer to the kernfs_node that belongs to the root you passed in. what it says on the tin, fr fr.

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🔥 SEE ALSO 🔥

kernel file ./fs/kernfs/dir.c — that's where the actual goods live, iykyk 📂 and then the whole friend group of related calls, all of them, in order, no one left behind:

• 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_add_one(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_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)

go read dir.c if you wanna see how the sausage gets made, this page is just the glow-up summary 🌈

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that's the whole page, babe — short, sweet, and absolutely slaying 💜 this one comes from ./fs/kernfs, dated October 2026, and no I will not be elaborating further, mwah 🫶💖