Fix build with musl

aya/include/linux_wrapper.h

@@ -3,3 +3,4 @@
 #include <linux/perf_event.h>
 #include <linux/if_link.h>
 #include <linux/rtnetlink.h>
+#include <asm-generic/socket.h>

aya/scripts/gen-bindings

@@ -36,7 +36,9 @@ BPF_VARS="\
     BPF_DW \
     BPF_W \
     BPF_H \
-    BPF_B
+    BPF_B \
+    SO_ATTACH_BPF \
+    SO_DETACH_BPF
     "
 
 BTF_TYPES="\

aya/src/generated/linux_bindings_aarch64.rs

@@ -128,6 +128,8 @@ pub const XDP_FLAGS_HW_MODE: u32 = 8;
 pub const XDP_FLAGS_REPLACE: u32 = 16;
 pub const XDP_FLAGS_MODES: u32 = 14;
 pub const XDP_FLAGS_MASK: u32 = 31;
+pub const SO_ATTACH_BPF: u32 = 50;
+pub const SO_DETACH_BPF: u32 = 27;
 pub type __u8 = ::std::os::raw::c_uchar;
 pub type __s16 = ::std::os::raw::c_short;
 pub type __u16 = ::std::os::raw::c_ushort;

aya/src/generated/linux_bindings_x86_64.rs

@@ -128,6 +128,8 @@ pub const XDP_FLAGS_HW_MODE: u32 = 8;
 pub const XDP_FLAGS_REPLACE: u32 = 16;
 pub const XDP_FLAGS_MODES: u32 = 14;
 pub const XDP_FLAGS_MASK: u32 = 31;
+pub const SO_ATTACH_BPF: u32 = 50;
+pub const SO_DETACH_BPF: u32 = 27;
 pub type __u8 = ::std::os::raw::c_uchar;
 pub type __s16 = ::std::os::raw::c_short;
 pub type __u16 = ::std::os::raw::c_ushort;

aya/src/programs/socket_filter.rs

@@ -1,9 +1,9 @@
-use libc::{setsockopt, SOL_SOCKET, SO_ATTACH_BPF, SO_DETACH_BPF};
+use libc::{setsockopt, SOL_SOCKET};
 use std::{io, mem, os::unix::prelude::RawFd};
 use thiserror::Error;
 
 use crate::{
-    generated::bpf_prog_type::BPF_PROG_TYPE_SOCKET_FILTER,
+    generated::{bpf_prog_type::BPF_PROG_TYPE_SOCKET_FILTER, SO_ATTACH_BPF, SO_DETACH_BPF},
     programs::{load_program, Link, LinkRef, ProgramData, ProgramError},
 };
 
@@ -33,7 +33,7 @@ impl SocketFilter {
             setsockopt(
                 socket,
                 SOL_SOCKET,
-                SO_ATTACH_BPF,
+                SO_ATTACH_BPF as i32,
                 &prog_fd as *const _ as *const _,
                 mem::size_of::<RawFd>() as u32,
             )
@@ -64,7 +64,7 @@ impl Link for SocketFilterLink {
                 setsockopt(
                     self.socket,
                     SOL_SOCKET,
-                    SO_DETACH_BPF,
+                    SO_DETACH_BPF as i32,
                     &fd as *const _ as *const _,
                     mem::size_of::<RawFd>() as u32,
                 );

aya/src/sys/mod.rs

@@ -5,7 +5,7 @@ mod perf_event;
 #[cfg(test)]
 mod fake;
 
-use std::{ffi::CString, io, mem};
+use std::{convert::TryInto, ffi::CString, io, mem};
 
 use libc::{c_int, c_long, c_ulong, pid_t, utsname};
 
@@ -61,7 +61,9 @@ unsafe fn syscall_impl(call: Syscall) -> SysResult {
             group,
             flags,
         } => libc::syscall(SYS_perf_event_open, &attr, pid, cpu, group, flags),
-        PerfEventIoctl { fd, request, arg } => libc::ioctl(fd, request, arg) as i64,
+        PerfEventIoctl { fd, request, arg } => {
+            libc::ioctl(fd, request.try_into().unwrap(), arg) as i64
+        }
     };
 
     if ret < 0 {