i_binfmt_misc(9)

💅 i_binfmt_misc(9) — Kernel API Manual, bestie edition

okay so picture this: it's a (9) man page, it lives in the Kernel API Manual, and it's about one (1) tiny helper. she's small, she's focused, she's literally the friend who knows exactly where everything is. let's get into it 🎀

---

✨ NAME ✨

i_binfmt_misc — retrieve struct binfmt_misc from a binfmt_misc inode

like, that's the whole job. she retrieves the struct. from the inode. no notes. 💅

---

🦋 SYNOPSIS 🦋

struct binfmt_misc * i_binfmt_misc (struct inode *inode );

inode → the inode of the relevant binfmt_misc instance. yes that's a pointer. yes the asterisk goes with the inode. we stay exact, we stay iconic. ✨

---

🌸 ARGUMENTS 🌸

• inode — the inode of the relevant binfmt_misc instance. that's it, that's the whole argument list. she takes one thing and she takes it well 🫶

---

👑 DESCRIPTION 👑

so what does this helper actually do? she retrieves struct binfmt_misc from a binfmt_misc inode. periodt. that's her entire personality and honestly? love that for her.

and here's the lowkey genius part: she can do this without any memory barriers 🧚 because we are guaranteed that user_ns->binfmt_misc is fully initialized. it was fully initialized back when the binfmt_misc mount was first created — like, the vibes were set at mount time and they've been immaculate ever since. no fence needed, no barrier, no waiting around. main character energy for real 💖

no cap on the "no memory barriers" thing — it's safe specifically because of that initialization guarantee. it's giving "trust the mount". don't go adding barriers for funsies 😭

---

🔥 RETURN 🔥

she hands you the struct binfmt_misc of the relevant binfmt_misc instance. the one you asked for. the correct one. slay 🌈

---

🎀 SEE ALSO 🎀

the lore runs deep, bestie — start with the kernel file ./fs/binfmt_misc.c and then honestly just read the whole extended universe:

• struct binfmt_misc_flag(9)
• search_binfmt_handler(9)
• get_binfmt_handler(9)
• binfmt_misc_find_interp(9)
• entry_attach_interpreter(9)
• put_binfmt_handler(9)
• current_binfmt_misc(9)
• entry_select_interpreter(9)
• entry_invocation_flags(9)
• entry_open_interpreter(9)
• build_interp_argv(9)
• bm_evict_inode(9)
• unlink_binfmt_handler(9)
• remove_binfmt_handler(9)
• bm_unlink(9)
• bm_entry_add_interp(9)

---

⭐ friendly reminder that every one of those names is exact — no shortcuts, no renaming, we respect the function signatures in this house 💜

---

k bye bestie, this page came to you from the ./fs source, dated October 2026 — go forth and retrieve those structs responsibly 🍓💖✨