update/add missing AF_XDP structs & constants

(backport <#3956>)
(cherry picked from commit 6bc41c9)

Author: arctic-alpaca

libc-test/build.rs

@@ -3888,12 +3888,25 @@ fn test_linux(target: &str) {
 
             // FIXME: Requires >= 5.4 kernel headers.
             // Everything that uses install-musl.sh has 4.19 kernel headers.
-            "xdp_umem_reg" | "xdp_ring_offset" | "xdp_mmap_offsets" if musl => true,
+            "xdp_ring_offset" | "xdp_mmap_offsets" if musl => true,
+
+            // FIXME: Requires >= 6.8 kernel headers.
+            // A field was added in 6.8.
+            // https://github.com/torvalds/linux/commit/341ac980eab90ac1f6c22ee9f9da83ed9604d899
+            // The previous version of the struct was removed in 6.11 due to a bug.
+            // https://github.com/torvalds/linux/commit/32654bbd6313b4cfc82297e6634fa9725c3c900f
+            "xdp_umem_reg" => true,
 
             // FIXME: Requires >= 5.9 kernel headers.
             // Everything that uses install-musl.sh has 4.19 kernel headers.
             "xdp_statistics" if musl => true,
 
+            // FIXME: Requires >= 6.8 kernel headers.
+            "xsk_tx_metadata"
+            | "__c_anonymous_xsk_tx_metadata_union"
+            | "xsk_tx_metadata_request"
+            | "xsk_tx_metadata_completion" => true,
+
             // A new field was added in kernel 5.4, this is the old version for backwards compatibility.
             // https://github.com/torvalds/linux/commit/77cd0d7b3f257fd0e3096b4fdcff1a7d38e99e10
             "xdp_ring_offset_v1" | "xdp_mmap_offsets_v1" => true,
@@ -4338,6 +4351,23 @@ fn test_linux(target: &str) {
                 true
             }
 
+            // FIXME: Requires >= 6.8 kernel headers.
+            "XDP_UMEM_TX_SW_CSUM"
+            | "XDP_TXMD_FLAGS_TIMESTAMP"
+            | "XDP_TXMD_FLAGS_CHECKSUM"
+            | "XDP_TX_METADATA"
+                =>
+            {
+                true
+            }
+
+            // FIXME: Requires >= 6.11 kernel headers.
+            "XDP_UMEM_TX_METADATA_LEN"
+                =>
+            {
+                true
+            }
+
             // FIXME: Requires >= 6.6 kernel headers.
             "SYS_fchmodat2" => true,
 
@@ -4596,7 +4626,9 @@ fn test_linux(target: &str) {
         (musl && struct_ == "mcontext_t" && field == "__extcontext" && loongarch64) ||
         // FIXME(#4121): a new field was added from `f_spare`
         (struct_ == "statvfs" && field == "__f_spare") ||
-        (struct_ == "statvfs64" && field == "__f_spare")
+        (struct_ == "statvfs64" && field == "__f_spare") ||
+        // the `xsk_tx_metadata_union` field is an anonymous union
+        (struct_ == "xsk_tx_metadata" && field == "xsk_tx_metadata_union")
     });
 
     cfg.skip_roundtrip(move |s| match s {

libc-test/semver/linux-gnu.txt

@@ -489,12 +489,17 @@ XDP_RING_NEED_WAKEUP
 XDP_RX_RING
 XDP_SHARED_UMEM
 XDP_STATISTICS
+XDP_TXMD_FLAGS_CHECKSUM
+XDP_TXMD_FLAGS_TIMESTAMP
+XDP_TX_METADATA
 XDP_TX_RING
 XDP_UMEM_COMPLETION_RING
 XDP_UMEM_FILL_RING
 XDP_UMEM_PGOFF_COMPLETION_RING
 XDP_UMEM_PGOFF_FILL_RING
 XDP_UMEM_REG
+XDP_UMEM_TX_METADATA_LEN
+XDP_UMEM_TX_SW_CSUM
 XDP_UMEM_UNALIGNED_CHUNK_FLAG
 XDP_USE_NEED_WAKEUP
 XDP_USE_SG

libc-test/semver/linux-musl.txt

@@ -48,12 +48,17 @@ XDP_RING_NEED_WAKEUP
 XDP_RX_RING
 XDP_SHARED_UMEM
 XDP_STATISTICS
+XDP_TXMD_FLAGS_CHECKSUM
+XDP_TXMD_FLAGS_TIMESTAMP
+XDP_TX_METADATA
 XDP_TX_RING
 XDP_UMEM_COMPLETION_RING
 XDP_UMEM_FILL_RING
 XDP_UMEM_PGOFF_COMPLETION_RING
 XDP_UMEM_PGOFF_FILL_RING
 XDP_UMEM_REG
+XDP_UMEM_TX_METADATA_LEN
+XDP_UMEM_TX_SW_CSUM
 XDP_UMEM_UNALIGNED_CHUNK_FLAG
 XDP_USE_NEED_WAKEUP
 XDP_USE_SG

src/unix/linux_like/linux/gnu/mod.rs

@@ -401,6 +401,7 @@ s! {
         pub chunk_size: ::__u32,
         pub headroom: ::__u32,
         pub flags: ::__u32,
+        pub tx_metadata_len: ::__u32,
     }
 
     pub struct xdp_umem_reg_v1 {
@@ -435,6 +436,15 @@ s! {
         pub options: ::__u32,
     }
 
+    pub struct xsk_tx_metadata_completion {
+        pub tx_timestamp: ::__u64,
+    }
+
+    pub struct xsk_tx_metadata_request {
+        pub csum_start: ::__u16,
+        pub csum_offset: ::__u16,
+    }
+
     pub struct iocb {
         pub aio_data: ::__u64,
         #[cfg(target_endian = "little")]
@@ -656,6 +666,18 @@ s_no_extra_traits! {
         pub ut_addr_v6: [i32; 4],
         __glibc_reserved: [::c_char; 20],
     }
+
+    #[allow(missing_debug_implementations)]
+    pub struct xsk_tx_metadata {
+        pub flags: ::__u64,
+        pub xsk_tx_metadata_union: __c_anonymous_xsk_tx_metadata_union,
+    }
+
+    #[allow(missing_debug_implementations)]
+    pub union __c_anonymous_xsk_tx_metadata_union {
+        pub request: xsk_tx_metadata_request,
+        pub completion: xsk_tx_metadata_completion,
+    }
 }
 
 cfg_if! {
@@ -1087,6 +1109,8 @@ pub const XDP_USE_NEED_WAKEUP: ::__u16 = 1 << 3;
 pub const XDP_USE_SG: ::__u16 = 1 << 4;
 
 pub const XDP_UMEM_UNALIGNED_CHUNK_FLAG: ::__u32 = 1 << 0;
+pub const XDP_UMEM_TX_SW_CSUM: ::__u32 = 1 << 1;
+pub const XDP_UMEM_TX_METADATA_LEN: ::__u32 = 1 << 2;
 
 pub const XDP_RING_NEED_WAKEUP: ::__u32 = 1 << 0;
 
@@ -1109,7 +1133,11 @@ pub const XDP_UMEM_PGOFF_COMPLETION_RING: ::c_ulonglong = 0x180000000;
 pub const XSK_UNALIGNED_BUF_OFFSET_SHIFT: ::c_int = 48;
 pub const XSK_UNALIGNED_BUF_ADDR_MASK: ::c_ulonglong = (1 << XSK_UNALIGNED_BUF_OFFSET_SHIFT) - 1;
 
+pub const XDP_TXMD_FLAGS_TIMESTAMP: ::__u32 = 1 << 0;
+pub const XDP_TXMD_FLAGS_CHECKSUM: ::__u32 = 1 << 1;
+
 pub const XDP_PKT_CONTD: ::__u32 = 1 << 0;
+pub const XDP_TX_METADATA: ::__u32 = 1 << 1;
 
 pub const ELFOSABI_ARM_AEABI: u8 = 64;
 

src/unix/linux_like/linux/musl/mod.rs

@@ -311,6 +311,7 @@ s! {
         pub chunk_size: ::__u32,
         pub headroom: ::__u32,
         pub flags: ::__u32,
+        pub tx_metadata_len: ::__u32,
     }
 
     pub struct xdp_umem_reg_v1 {
@@ -345,6 +346,15 @@ s! {
         pub options: ::__u32,
     }
 
+    pub struct xsk_tx_metadata_completion {
+        pub tx_timestamp: ::__u64,
+    }
+
+    pub struct xsk_tx_metadata_request {
+        pub csum_start: ::__u16,
+        pub csum_offset: ::__u16,
+    }
+
     // netinet/tcp.h
 
     pub struct tcp_info {
@@ -482,6 +492,18 @@ s_no_extra_traits! {
         pub ut_addr_v6: [::c_uint; 4],
         __unused: [::c_char; 20],
     }
+
+    #[allow(missing_debug_implementations)]
+    pub struct xsk_tx_metadata {
+        pub flags: ::__u64,
+        pub xsk_tx_metadata_union: __c_anonymous_xsk_tx_metadata_union,
+    }
+
+    #[allow(missing_debug_implementations)]
+    pub union __c_anonymous_xsk_tx_metadata_union {
+        pub request: xsk_tx_metadata_request,
+        pub completion: xsk_tx_metadata_completion,
+    }
 }
 
 cfg_if! {
@@ -887,6 +909,8 @@ pub const XDP_USE_NEED_WAKEUP: ::__u16 = 1 << 3;
 pub const XDP_USE_SG: ::__u16 = 1 << 4;
 
 pub const XDP_UMEM_UNALIGNED_CHUNK_FLAG: ::__u32 = 1 << 0;
+pub const XDP_UMEM_TX_SW_CSUM: ::__u32 = 1 << 1;
+pub const XDP_UMEM_TX_METADATA_LEN: ::__u32 = 1 << 2;
 
 pub const XDP_RING_NEED_WAKEUP: ::__u32 = 1 << 0;
 
@@ -909,7 +933,11 @@ pub const XDP_UMEM_PGOFF_COMPLETION_RING: ::c_ulonglong = 0x180000000;
 pub const XSK_UNALIGNED_BUF_OFFSET_SHIFT: ::c_int = 48;
 pub const XSK_UNALIGNED_BUF_ADDR_MASK: ::c_ulonglong = (1 << XSK_UNALIGNED_BUF_OFFSET_SHIFT) - 1;
 
+pub const XDP_TXMD_FLAGS_TIMESTAMP: ::__u32 = 1 << 0;
+pub const XDP_TXMD_FLAGS_CHECKSUM: ::__u32 = 1 << 1;
+
 pub const XDP_PKT_CONTD: ::__u32 = 1 << 0;
+pub const XDP_TX_METADATA: ::__u32 = 1 << 1;
 
 pub const _CS_V6_ENV: ::c_int = 1148;
 pub const _CS_V7_ENV: ::c_int = 1149;