__ns_tree_adjoined_rcu(9)

💅 __ns_tree_adjoined_rcu — like, the Kernel API Manual page, bestie ✨

okay so. welcome to the Kernel API Manual entry for __ns_tree_adjoined_rcu(9), and no cap this one is actually so useful — it's your little tour guide through the namespace tree. let's get into it 🫶

---

✨ NAME ✨

__ns_tree_adjoined_rcu — find the next/previous namespace in the same tree 🌳

like literally, it's giving "who's sitting next to me in this tree" energy. main character function fr fr.

---

🎀 SYNOPSIS 🎀

struct ns_common * __ns_tree_adjoined_rcu (struct ns_common *ns , struct ns_tree_root *ns_tree , bool previous );

that's the whole vibe. three params in, a struct ns_common * out. slay 💅

---

🌸 ARGUMENTS 🌸

• ns — the namespace you're starting from. your home base, your starting point, the "you are here" dot on the map 📍
• ns_tree — the namespace tree you wanna search in. this is the whole tree we're rummaging around in 🌳
• previous — a bool, and it's the direction switch: if it's true, find the previous namespace; otherwise you get the next one. yes bestie, it's a whole vibe check on which way you're heading 🧭

---

🦋 DESCRIPTION 🦋

so what does it actually do? it finds the next or previous namespace in the same tree as ns. that's it. that's the whole thing. iconic behaviour honestly 💖

and — important — if there is no next/previous namespace, then -ENOENT is returned. so like, if you hit the end of the tree, you don't get a random surprise, you get a clean -ENOENT. no cap, that's your signal that there's literally nothing adjoined over there 😭

ngl, that -ENOENT is your bestie telling you "girl, there's nobody there". handle it, don't ignore it 🙈

---

🔥 SEE ALSO 🔥

go read these next, iykyk:

• Kernel file ./kernel/nstree.c — the source, the mothership, the place where it all happens 👑
• ns_tree_node_init(9)
• ns_tree_root_init(9)
• ns_tree_node_empty(9)
• ns_tree_node_add(9)
• ns_tree_node_del(9)
• __ns_tree_gen_id(9)

all the tree-related besties, all linked up. collect them all like little butterflies 🦋✨

---

and that's the page!! 🌈 this whole thing lives over in ./kernel, dated October 2026, and it's the __ns_tree_adjoined_rcu(9) page through and through. mwah, go forth and traverse your trees responsibly 💜🎀🍓