common_perm_rm(9)

💅 common_perm_rm(9) — Kernel API Manual ✨

okay so bestie, we're in the kernel docs rn, specifically the common_perm_rm(9) page from the Kernel API Manual, and honestly? it's a little one but it's important. let's get into it 🎀

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🌸 NAME 🌸

common_perm_rm — the common permission wrapper for operations doing rm

like, it's the vibe-check bouncer that stands at the door whenever something's about to get deleted. no cap. 🗑️✨

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🦋 SYNOPSIS 🦋

int common_perm_rm (const char *op , const struct path *dir , struct
dentry *dentry , u32 mask );

that's the whole signature, bestie, and yes the spacing is exactly like that, i don't make the rules (i do copy them though 💀)

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👑 ARGUMENTS 👑

okay so here's what you're feeding it, and every single one matters:

• op — literally just the operation being checked. it's the "what are we even doing here" of it all 🫶
• dir — the directory that the dentry is in. and listen to me: NOT NULL. like, do not. it says NOT NULL for a reason 🙈
• dentry — the dentry being rm'd. also NOT NULL. same energy, same warning, respect it 💅
• mask — the requested permission mask. this is the actual ask, the "may i please" of the whole operation ⭐

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🔥 RETURN 🔥

0 — that's the slay, we're good, permission granted, go ahead and do the thing 💖

otherwise? an error code, if there's an error or permission was denied. so like, if you see anything that isn't 0, something said no and you should probably listen 😭

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🌈 SEE ALSO 🌈

this page has SO many friends, it's giving main character with a whole group chat. go read these next, i'm obsessed:

• Kernel file ./security/apparmor/lsm.c
• common_perm(9)
• common_perm_cond(9)
• common_perm_dir_dentry(9)
• common_perm_create(9)
• apparmor_uring_override_creds(9)
• apparmor_uring_sqpoll(9)
• apparmor_bprm_committing_creds(9)
• apparmor_bprm_committed_creds(9)
• apparmor_sk_clone_security(9)
• apparmor_unix_stream_connect(9)
• apparmor_unix_may_send(9)
• apparmor_socket_post_create(9)
• apparmor_socket_bind(9)
• apparmor_socket_getpeersec_stream(9)
• apparmor_socket_getpeersec_dgram(9)
• apparmor_sock_graft(9)
• apparmor_socket_sock_rcv_skb(9)
• set_init_ctx(9)

that's the whole friend group, iykyk 🧚💜

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lowkey reminder bestie: dir and dentry are both NOT NULL. the page says it twice because it means it twice. don't come crying to me when it segfaults 🙈

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and that's the page!! mwah 💋 this one lives over in ./security/apparmor, and the manual's dated October 2026 — so like, future iconic behavior honestly. go forth and rm responsibly, babe 🍓✨👑