Auto merge of #3486 - devnexen:linux_iocb, r=JohnTitor

adding iocb data for io_submit syscall for linux/glibc.

close #3485

Author: bors

libc-test/build.rs

@@ -3406,6 +3406,7 @@ fn test_linux(target: &str) {
     headers! {
         cfg:
         "asm/mman.h",
+        [gnu]: "linux/aio_abi.h",
         "linux/can.h",
         "linux/can/raw.h",
         // FIXME: requires kernel headers >= 5.4.1.

libc-test/semver/linux-gnu.txt

@@ -638,6 +638,7 @@ glob64
 glob64_t
 globfree
 globfree64
+iocb
 lio_listio
 mallinfo
 mallinfo2

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

@@ -3,6 +3,7 @@ pub type __priority_which_t = ::c_uint;
 pub type __rlimit_resource_t = ::c_uint;
 pub type Lmid_t = ::c_long;
 pub type regoff_t = ::c_int;
+pub type __kernel_rwf_t = ::c_int;
 
 cfg_if! {
     if #[cfg(doc)] {
@@ -432,6 +433,27 @@ s! {
         pub len: ::__u32,
         pub options: ::__u32,
     }
+
+    pub struct iocb {
+        pub aio_data: ::__u64,
+        #[cfg(target_endian = "little")]
+        pub aio_key: ::__u32,
+        #[cfg(target_endian = "little")]
+        pub aio_rw_flags: ::__kernel_rwf_t,
+        #[cfg(target_endian = "big")]
+        pub aio_rw_flags: ::__kernel_rwf_t,
+        #[cfg(target_endian = "big")]
+        pub aio_key: ::__u32,
+        pub aio_lio_opcode: ::__u16,
+        pub aio_reqprio: ::__s16,
+        pub aio_fildes: ::__u32,
+        pub aio_buf: ::__u64,
+        pub aio_nbytes: ::__u64,
+        pub aio_offset: ::__s64,
+        aio_reserved2: ::__u64,
+        pub aio_flags: ::__u32,
+        pub aio_resfd: ::__u32,
+    }
 }
 
 impl siginfo_t {