Merge pull request #3247 from marcelbuesing/canxl

Add linux canxl constants and canxl frame struct

Author: joshtriplett

libc-test/build.rs

@@ -3469,6 +3469,8 @@ fn test_linux(target: &str) {
             "sctp_initmsg" | "sctp_sndrcvinfo" | "sctp_sndinfo" | "sctp_rcvinfo"
             | "sctp_nxtinfo" | "sctp_prinfo" | "sctp_authinfo" => true,
 
+            // FIXME: requires >= 6.1 kernel headers
+            "canxl_frame" => true,
             _ => false,
         }
     });
@@ -3651,7 +3653,22 @@ fn test_linux(target: &str) {
             "FUTEX_LOCK_PI2" => true,
 
             // Added in  linux 6.1
-            "STATX_DIOALIGN" => true,
+            "STATX_DIOALIGN"
+            | "CAN_RAW_XL_FRAMES"
+            | "CANXL_HDR_SIZE"
+            | "CANXL_MAX_DLC"
+            | "CANXL_MAX_DLC_MASK"
+            | "CANXL_MAX_DLEN"
+            | "CANXL_MAX_MTU"
+            | "CANXL_MIN_DLC"
+            | "CANXL_MIN_DLEN"
+            | "CANXL_MIN_MTU"
+            | "CANXL_MTU"
+            | "CANXL_PRIO_BITS"
+            | "CANXL_PRIO_MASK"
+            | "CANXL_SEC"
+            | "CANXL_XLF"
+             => true,
 
             // FIXME: Parts of netfilter/nfnetlink*.h require more recent kernel headers:
             | "RTNLGRP_MCTP_IFADDR" // linux v5.17+

libc-test/semver/linux.txt

@@ -237,6 +237,20 @@ CAN_RAW_LOOPBACK
 CAN_RAW_RECV_OWN_MSGS
 CAN_RAW_FD_FRAMES
 CAN_RAW_JOIN_FILTERS
+CAN_RAW_XL_FRAMES
+CANXL_HDR_SIZE
+CANXL_MAX_DLC
+CANXL_MAX_DLC_MASK
+CANXL_MAX_DLEN
+CANXL_MAX_MTU
+CANXL_MIN_DLC
+CANXL_MIN_DLEN
+CANXL_MIN_MTU
+CANXL_MTU
+CANXL_PRIO_BITS
+CANXL_PRIO_MASK
+CANXL_SEC
+CANXL_XLF
 CBAUD
 CBAUDEX
 CLD_CONTINUED
@@ -3056,6 +3070,7 @@ can_err_mask_t
 can_filter
 can_frame
 canfd_frame
+canxl_frame
 canid_t
 chroot
 clearenv

src/unix/linux_like/linux/align.rs

@@ -176,6 +176,17 @@ macro_rules! expand_align {
                 __res1: u8,
                 pub data: [u8; CANFD_MAX_DLEN],
             }
+
+            #[repr(align(8))]
+            #[allow(missing_debug_implementations)]
+            pub struct canxl_frame {
+                pub prio: canid_t,
+                pub flags: u8,
+                pub sdt: u8,
+                pub len: u16,
+                pub af: u32,
+                pub data: [u8; CANXL_MAX_DLEN],
+            }
         }
     };
 }

src/unix/linux_like/linux/mod.rs

@@ -3723,9 +3723,11 @@ pub const CAN_ERR_FLAG: canid_t = 0x20000000;
 pub const CAN_SFF_MASK: canid_t = 0x000007FF;
 pub const CAN_EFF_MASK: canid_t = 0x1FFFFFFF;
 pub const CAN_ERR_MASK: canid_t = 0x1FFFFFFF;
+pub const CANXL_PRIO_MASK: ::canid_t = CAN_SFF_MASK;
 
 pub const CAN_SFF_ID_BITS: ::c_int = 11;
 pub const CAN_EFF_ID_BITS: ::c_int = 29;
+pub const CANXL_PRIO_BITS: ::c_int = CAN_SFF_ID_BITS;
 
 pub const CAN_MAX_DLC: ::c_int = 8;
 pub const CAN_MAX_DLEN: usize = 8;
@@ -3735,10 +3737,26 @@ pub const CANFD_MAX_DLEN: usize = 64;
 pub const CANFD_BRS: ::c_int = 0x01;
 pub const CANFD_ESI: ::c_int = 0x02;
 
+pub const CANXL_MIN_DLC: ::c_int = 0;
+pub const CANXL_MAX_DLC: ::c_int = 2047;
+pub const CANXL_MAX_DLC_MASK: ::c_int = 0x07FF;
+pub const CANXL_MIN_DLEN: usize = 1;
+pub const CANXL_MAX_DLEN: usize = 2048;
+
+pub const CANXL_XLF: ::c_int = 0x80;
+pub const CANXL_SEC: ::c_int = 0x01;
+
 cfg_if! {
     if #[cfg(libc_align)] {
         pub const CAN_MTU: usize = ::mem::size_of::<can_frame>();
         pub const CANFD_MTU: usize = ::mem::size_of::<canfd_frame>();
+        pub const CANXL_MTU: usize = ::mem::size_of::<canxl_frame>();
+        // FIXME: use `core::mem::offset_of!` once that is available
+        // https://github.com/rust-lang/rfcs/pull/3308
+        // pub const CANXL_HDR_SIZE: usize = core::mem::offset_of!(canxl_frame, data);
+        pub const CANXL_HDR_SIZE: usize = 12;
+        pub const CANXL_MIN_MTU: usize = CANXL_HDR_SIZE + 64;
+        pub const CANXL_MAX_MTU: usize = CANXL_MTU;
     }
 }
 
@@ -3764,6 +3782,7 @@ pub const CAN_RAW_LOOPBACK: ::c_int = 3;
 pub const CAN_RAW_RECV_OWN_MSGS: ::c_int = 4;
 pub const CAN_RAW_FD_FRAMES: ::c_int = 5;
 pub const CAN_RAW_JOIN_FILTERS: ::c_int = 6;
+pub const CAN_RAW_XL_FRAMES: ::c_int = 7;
 
 // linux/can/j1939.h
 pub const SOL_CAN_J1939: ::c_int = SOL_CAN_BASE + CAN_J1939;