sysfs_remove_file_ns(9)

💅 sysfs_remove_file_ns — the Kernel API Manual, but make it make sense 🎀

okay so real talk, bestie: this one lives in the Kernel API Manual (yes, the (9) section, that's the kernel-functions girlies 💜), and it's genuinely one of the most satisfying little cleanup functions in all of sysfs. it's giving Marie Kondo but for kobjects. Let's go. ✨

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✨ NAME ✨

sysfs_remove_file_ns — remove an object attribute with a custom ns tag 🗑️🏷️

like, it removes a sysfs attribute, but the file was tagged with a namespace, so you gotta hand over the tag too. iykyk 💅

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🌸 SYNOPSIS 🌸

void sysfs_remove_file_ns (struct kobject *kobj , const struct attribute
*attr , const struct ns_common *ns );

returns nothing (void) — it just does the thing and dips. no cap. 💨

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🦋 ARGUMENTS 🦋

• kobj — the object we're acting for 👑 like, whose attribute is this anyway? that's your main character right there.
• attr — the attribute descriptor. this is the little descriptor that says which attribute we're yeeting, bestie.
• ns — the namespace tag of the file to remove 🏷️ the exact tag the file was created with. no tag, no takedown, fr fr.

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🔥 DESCRIPTION 🔥

Okay so here's the whole vibe: it hashes the attribute name and the namespace tag, and then it kills the victim. 💀🔪

yes, the manpage literally says "kill the victim" — i'm not making that up, that's the official energy. it's a targeted takedown: hash both bits of info, find the exact file that matches, and remove it. not me being dramatic, that's just the function. periodt. 👑

no, you can't skip the ns argument. the tag is part of the identity. it's not optional, it's not a vibe, it's load-bearing. 🙈

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👑 SEE ALSO 👑

the kernel file itself is ./fs/sysfs/file.c — go read it, it's fine, it's giving source-of-truth 🌈

and the whole sysfs friend group 🫶:

• sysfs_create_file_ns(9) — the one that made it in the first place, the birth-giver 💖
• sysfs_add_file_to_group(9)
• sysfs_chmod_file(9)
• sysfs_break_active_protection(9)
• sysfs_unbreak_active_protection(9)
• sysfs_remove_file_self(9)
• sysfs_remove_file_from_group(9)
• sysfs_create_bin_file(9)
• sysfs_remove_bin_file(9)
• sysfs_link_change_owner(9)
• sysfs_file_change_owner(9)
• sysfs_change_owner(9)
• sysfs_emit(9)
• sysfs_emit_at(9)
• sysfs_bin_attr_simple_read(9)

slay, that's the whole squad. go say hi. 🧚‍♀️

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bestie reminder 🎀 — this page is from the ./fs/sysfs source and it's dated October 2026, and the exact same title/name shows up in the header and the footer of the original. iconic bookending, honestly. 💖

okay bye, go remove some attributes responsibly, mwah 💋🌸