Auto merge of #2849 - devnexen:socket_linux_update, r=JohnTitor

Few socket updates related for Linux.

Author: bors

libc-test/build.rs

@@ -2820,6 +2820,7 @@ fn test_linux(target: &str) {
         "linux/sched.h",
         "linux/seccomp.h",
         "linux/sched.h",
+        "linux/sock_diag.h",
         "linux/sockios.h",
         "linux/uinput.h",
         "linux/vm_sockets.h",

libc-test/semver/linux.txt

@@ -1181,6 +1181,7 @@ MSG_RST
 MSG_STAT
 MSG_SYN
 MSG_WAITFORONE
+MSG_ZEROCOPY
 MS_ACTIVE
 MS_BIND
 MS_DIRSYNC

src/unix/linux_like/linux/mod.rs

@@ -1565,6 +1565,7 @@ pub const MSG_INFO: ::c_int = 12;
 
 pub const MSG_NOERROR: ::c_int = 0o10000;
 pub const MSG_EXCEPT: ::c_int = 0o20000;
+pub const MSG_ZEROCOPY: ::c_int = 0x4000000;
 
 pub const SHM_R: ::c_int = 0o400;
 pub const SHM_W: ::c_int = 0o200;
@@ -1841,6 +1842,17 @@ pub const IPV6_FLOWINFO_PRIORITY: ::c_int = 0x0ff00000;
 pub const IPV6_RTHDR_LOOSE: ::c_int = 0;
 pub const IPV6_RTHDR_STRICT: ::c_int = 1;
 
+// SO_MEMINFO offsets
+pub const SK_MEMINFO_RMEM_ALLOC: ::c_int = 0;
+pub const SK_MEMINFO_RCVBUF: ::c_int = 1;
+pub const SK_MEMINFO_WMEM_ALLOC: ::c_int = 2;
+pub const SK_MEMINFO_SNDBUF: ::c_int = 3;
+pub const SK_MEMINFO_FWD_ALLOC: ::c_int = 4;
+pub const SK_MEMINFO_WMEM_QUEUED: ::c_int = 5;
+pub const SK_MEMINFO_OPTMEM: ::c_int = 6;
+pub const SK_MEMINFO_BACKLOG: ::c_int = 7;
+pub const SK_MEMINFO_DROPS: ::c_int = 8;
+
 pub const IUTF8: ::tcflag_t = 0x00004000;
 #[cfg(not(all(target_env = "uclibc", target_arch = "mips")))]
 pub const CMSPAR: ::tcflag_t = 0o10000000000;