STRUCT SCIFIOCTL_MSG(9)

✨ struct scifioctl_msg(9) — the Kernel API Manual moment 💅

okay so bestie, today's main character is struct scifioctl_msg, straight out of section 9 of the kernel API manual, and she's the little struct that makes SCIF_SEND/SCIF_RECV IOCTLs happen 🎀 ngl she's tiny but she ATE.

🌸 NAME 🌸

struct scifioctl_msg — the struct used for the SCIF_SEND/SCIF_RECV IOCTL. periodt ✨

🦋 SYNOPSIS 🦋

struct scifioctl_msg {
    __u64 msg;
    __s32 len;
    __s32 flags;
    __s32 out_len;
 };

like, that's the whole vibe. four fields, zero drama 🫶

💖 Members 💖

• msg — the address of your message buffer. this is where the actual message lives, gorl 📬
• len — the length of the message. how much message are we talking about here 💅
• flags — the flags. yes, just flags. they're flags 🚩✨
• out_len — the number of bytes actually sent/received. the receipts, literally 🧾🔥

⭐ SEE ALSO ⭐

the kernel file ./include/uapi/linux/scif_ioctl.h is the mothership, and she's got a whole friend group — go say hi 👑:

• struct scif_port_id(9)
• struct scifioctl_connect(9)
• struct scifioctl_accept(9)
• struct scifioctl_reg(9)
• struct scifioctl_unreg(9)
• struct scifioctl_copy(9)
• struct scifioctl_fence_mark(9)
• struct scifioctl_fence_signal(9)
• struct scifioctl_node_ids(9)

and that's the whole page, bestie 💜 this iconic little entry lives under ./include/uapi/linux and is dated October 2026 — so yeah, she's from the future, and she's thriving. mwah 😭🎀🌸