security_xfrm_policy_alloc(9)

📦 version 7.3.1, in nixpkgs unstable

💅 security_xfrm_policy_alloc(9) — Kernel API Manual energy ✨

okay so bestie, we're deep in the kernel API manual (security_xfrm_policy_alloc(9), section 9, ofc) and this little function is about to make your SPD look so put together. LSM blob allocation, but make it xfrm. no cap. 🎀

🌸 NAME 🌸

security_xfrm_policy_alloc — allocate a xfrm policy LSM blob. that's it, that's the whole vibe. it makes the security-shaped thing for a policy. 💖

✨ SYNOPSIS ✨

int security_xfrm_policy_alloc (struct xfrm_sec_ctx **ctxp , struct
xfrm_user_sec_ctx *sec_ctx , gfp_t gfp );

three args, one int back. icon behavior honestly. 🔥

🫶 ARGUMENTS 🫶

  • ctxp — the xfrm security context that's getting added to the SPD. this is the spot where the fresh context lands, it's giving "give me a pointer-to-pointer and I'll fill it in" main character energy 💅
  • sec_ctx — the security label, and bestie, userspace handed it to us. that's where it came from. 🙈
  • gfp — the gfp flags. the whole entire allocation mood is set here, so pick ur flags wisely ✨

🦋 DESCRIPTION 🦋

so what does it actually do? it allocates a security structure into the xp->security field. literally that field, that's the one. 🌟

and like, important detail: that security field is initialized to NULL when the xfrm_policy is allocated. so it starts out empty (a clean slate, a blank canvas, we love to see it) and then this function comes in and gives it a whole personality. 🎀

ngl this is the kinda thing that just quietly works in the background and nobody claps for it. but we see you, security_xfrm_policy_alloc. we see you. 👑

⭐ RETURN ⭐

returns 0 if the operation was successful. zero equals slay in this house. 💀✨

🌈 SEE ALSO 🌈

bestie. sit down. hydrate. this list is long, and the brief says we keep every single one of them, so buckle up — every cross-reference is coming through, in order, untouched, fr fr. 💜

kernel file ./security/security.c:

and that's the list!! you made it, I'm so proud of you 🫶🎀

okay final lil sign-off bestie: this page lives in ./security and it's dated October 2026, and it's filed under security_xfrm_policy_alloc(9). go forth and allocate responsibly — remember the NULL init, remember the 0 return, and remember that you are, in fact, that girl. 💅✨🌸💖

📦 where this page comes from