handle a couple more TODOs

aya/src/maps/mod.rs

@@ -24,10 +24,9 @@
 //!
 //! let intercept_egress = SockMap::try_from(bpf.map_mut("INTERCEPT_EGRESS").unwrap())?;
 //! let map_fd = intercept_egress.fd()?;
-//! // TODO (AM) figure out lifetimes
-//! // let prog: &mut SkMsg = bpf.program_mut("intercept_egress_packet").unwrap().try_into()?;
-//! // prog.load()?;
-//! // prog.attach(map_fd)?;
+//! let prog: &mut SkMsg = bpf.program_mut("intercept_egress_packet").unwrap().try_into()?;
+//! prog.load()?;
+//! prog.attach(map_fd)?;
 //!
 //! # Ok::<(), aya::BpfError>(())
 //! ```

aya/src/maps/perf/perf_buffer.rs

@@ -2,7 +2,7 @@ use std::{
     ffi::c_void,
     io, mem,
     os::{
-        fd::OwnedFd,
+        fd::{AsFd, BorrowedFd, OwnedFd},
         unix::io::{AsRawFd, RawFd},
     },
     ptr, slice,
@@ -112,8 +112,7 @@ impl PerfBuffer {
                 size + page_size,
                 PROT_READ | PROT_WRITE,
                 MAP_SHARED,
-                // TODO (AM)
-                fd.as_raw_fd(),
+                fd.as_fd(),
                 0,
             )
         };
@@ -130,8 +129,7 @@ impl PerfBuffer {
             page_size,
         };
 
-        // TODO (AM)
-        perf_event_ioctl(perf_buf.fd.as_raw_fd(), PERF_EVENT_IOC_ENABLE, 0)
+        perf_event_ioctl(perf_buf.fd.as_fd(), PERF_EVENT_IOC_ENABLE, 0)
             .map_err(|(_, io_error)| PerfBufferError::PerfEventEnableError { io_error })?;
 
         Ok(perf_buf)
@@ -271,8 +269,7 @@ impl AsRawFd for PerfBuffer {
 impl Drop for PerfBuffer {
     fn drop(&mut self) {
         unsafe {
-            // TODO (AM)
-            let _ = perf_event_ioctl(self.fd.as_raw_fd(), PERF_EVENT_IOC_DISABLE, 0);
+            let _ = perf_event_ioctl(self.fd.as_fd(), PERF_EVENT_IOC_DISABLE, 0);
             munmap(
                 self.buf.load(Ordering::SeqCst) as *mut c_void,
                 self.size + self.page_size,
@@ -287,11 +284,11 @@ unsafe fn mmap(
     len: usize,
     prot: c_int,
     flags: c_int,
-    fd: i32,
+    fd: BorrowedFd<'_>,
     offset: libc::off_t,
 ) -> *mut c_void {
     #[cfg(not(test))]
-    return libc::mmap(addr, len, prot, flags, fd, offset);
+    return libc::mmap(addr, len, prot, flags, fd.as_raw_fd(), offset);
 
     #[cfg(test)]
     use crate::sys::TEST_MMAP_RET;

aya/src/programs/perf_attach.rs

@@ -1,6 +1,6 @@
 //! Perf attach links.
 use std::os::{
-    fd::{AsRawFd, BorrowedFd, OwnedFd},
+    fd::{AsFd, AsRawFd, BorrowedFd, OwnedFd},
     unix::io::RawFd,
 };
 
@@ -62,8 +62,7 @@ impl Link for PerfLink {
     }
 
     fn detach(mut self) -> Result<(), ProgramError> {
-        // TODO (AM)
-        let _ = perf_event_ioctl(self.perf_fd.as_raw_fd(), PERF_EVENT_IOC_DISABLE, 0);
+        let _ = perf_event_ioctl(self.perf_fd.as_fd(), PERF_EVENT_IOC_DISABLE, 0);
 
         if let Some(probe_kind) = self.probe_kind.take() {
             if let Some(event_alias) = self.event_alias.take() {
@@ -107,15 +106,13 @@ fn perf_attach_either(
     probe_kind: Option<ProbeKind>,
     event_alias: Option<String>,
 ) -> Result<PerfLinkInner, ProgramError> {
-    // TODO (AM)
-    perf_event_ioctl(fd.as_raw_fd(), PERF_EVENT_IOC_SET_BPF, prog_fd.as_raw_fd()).map_err(
+    perf_event_ioctl(fd.as_fd(), PERF_EVENT_IOC_SET_BPF, prog_fd.as_raw_fd()).map_err(
         |(_, io_error)| ProgramError::SyscallError {
             call: "PERF_EVENT_IOC_SET_BPF".to_owned(),
             io_error,
         },
     )?;
-    // TODO (AM)
-    perf_event_ioctl(fd.as_raw_fd(), PERF_EVENT_IOC_ENABLE, 0).map_err(|(_, io_error)| {
+    perf_event_ioctl(fd.as_fd(), PERF_EVENT_IOC_ENABLE, 0).map_err(|(_, io_error)| {
         ProgramError::SyscallError {
             call: "PERF_EVENT_IOC_ENABLE".to_owned(),
             io_error,

aya/src/sys/mod.rs

@@ -6,10 +6,9 @@ mod perf_event;
 mod fake;
 
 use std::io;
+use std::os::fd::BorrowedFd;
 #[cfg(not(test))]
-use std::{ffi::CString, mem};
-#[cfg(not(test))]
-use std::{fs::File, io::Read};
+use std::{ffi::CString, fs::File, io::Read, mem, os::fd::AsRawFd};
 
 #[cfg(not(test))]
 use libc::utsname;
@@ -39,7 +38,7 @@ pub(crate) enum Syscall<'a> {
         flags: u32,
     },
     PerfEventIoctl {
-        fd: c_int,
+        fd: BorrowedFd<'a>,
         request: c_int,
         arg: c_int,
     },
@@ -68,7 +67,7 @@ unsafe fn syscall_impl(call: Syscall) -> SysResult {
             flags,
         } => libc::syscall(SYS_perf_event_open, &attr, pid, cpu, group, flags),
         PerfEventIoctl { fd, request, arg } => {
-            libc::ioctl(fd, request.try_into().unwrap(), arg) as libc::c_long
+            libc::ioctl(fd.as_raw_fd(), request.try_into().unwrap(), arg) as libc::c_long
         }
     };
 

aya/src/sys/perf_event.rs

@@ -1,7 +1,7 @@
 use std::{
     ffi::CString,
     io, mem,
-    os::fd::{FromRawFd, OwnedFd, RawFd},
+    os::fd::{BorrowedFd, FromRawFd, OwnedFd, RawFd},
 };
 
 use libc::{c_int, pid_t};
@@ -126,7 +126,7 @@ pub(crate) fn perf_event_open_trace_point(id: u32, pid: Option<pid_t>) -> Result
     Ok(unsafe { OwnedFd::from_raw_fd(fd) })
 }
 
-pub(crate) fn perf_event_ioctl(fd: c_int, request: c_int, arg: c_int) -> SysResult {
+pub(crate) fn perf_event_ioctl(fd: BorrowedFd<'_>, request: c_int, arg: c_int) -> SysResult {
     let call = Syscall::PerfEventIoctl { fd, request, arg };
     #[cfg(not(test))]
     return syscall(call);