add various ptp_* structs

code is originally from rust-lang#3865.

libc-test/build.rs

@@ -3552,6 +3552,8 @@ fn test_linux(target: &str) {
         "linux/netlink.h",
         // FIXME: requires Linux >= 5.6:
         [!musl]: "linux/openat2.h",
+        // FIXME: some items require Linux >= 5.6:
+        "linux/ptp_clock.h",
         [!musl]: "linux/ptrace.h",
         "linux/quota.h",
         "linux/random.h",
@@ -3701,6 +3703,11 @@ fn test_linux(target: &str) {
             return true;
         }
 
+        // FIXME: CI has old headers
+        if ty == "ptp_sys_offset_extended" {
+            return true;
+        }
+
         // LFS64 types have been removed in musl 1.2.4+
         if musl && (ty.ends_with("64") || ty.ends_with("64_t")) {
             return true;
@@ -4422,7 +4429,11 @@ fn test_linux(target: &str) {
         // `__exit_status` type is a patch which is absent in musl
         (struct_ == "utmpx" && field == "ut_exit" && musl) ||
         // `can_addr` is an anonymous union
-        (struct_ == "sockaddr_can" && field == "can_addr")
+        (struct_ == "sockaddr_can" && field == "can_addr") ||
+        // `anonymous_1` is an anonymous union
+        (struct_ == "ptp_perout_request" && field == "anonymous_1") ||
+        // `anonymous_2` is an anonymous union
+        (struct_ == "ptp_perout_request" && field == "anonymous_2")
     });
 
     cfg.volatile_item(|i| {
@@ -4495,6 +4506,10 @@ fn test_linux(target: &str) {
         (struct_ == "fanotify_event_info_fid" && field == "fsid") ||
         // `handle` is a VLA
         (struct_ == "fanotify_event_info_fid" && field == "handle") ||
+        // `anonymous_1` is an anonymous union
+        (struct_ == "ptp_perout_request" && field == "anonymous_1") ||
+        // `anonymous_2` is an anonymous union
+        (struct_ == "ptp_perout_request" && field == "anonymous_2") ||
         // invalid application of 'sizeof' to incomplete type 'long unsigned int[]'
         (musl && struct_ == "mcontext_t" && field == "__extcontext" && loongarch64)
     });

libc-test/semver/linux.txt

@@ -2252,6 +2252,7 @@ PTHREAD_PRIO_PROTECT
 PTHREAD_PROCESS_PRIVATE
 PTHREAD_PROCESS_SHARED
 PTHREAD_STACK_MIN
+PTP_MAX_SAMPLES
 PTRACE_ATTACH
 PTRACE_CONT
 PTRACE_DETACH
@@ -3557,11 +3558,15 @@ __WNOTHREAD
 __c_anonymous_ifc_ifcu
 __c_anonymous_ifr_ifru
 __c_anonymous_ifru_map
+__c_anonymous_ptp_perout_request_1
+__c_anonymous_ptp_perout_request_2
 __c_anonymous_sockaddr_can_can_addr
 __c_anonymous_sockaddr_can_j1939
 __c_anonymous_sockaddr_can_tp
 __errno_location
 __exit_status
+__kernel_clockid_t
+__kernel_fsid_t
 __s16
 __s32
 __u16
@@ -3915,6 +3920,14 @@ pthread_spin_lock
 pthread_spin_trylock
 pthread_spin_unlock
 pthread_spinlock_t
+ptp_clock_time
+ptp_extts_event
+ptp_extts_request
+ptp_perout_request
+ptp_pin_desc
+ptp_sys_offset
+ptp_sys_offset_extended
+ptp_sys_offset_precise
 ptrace
 ptsname_r
 pwrite64

src/unix/linux_like/linux/mod.rs

@@ -19,6 +19,7 @@ pub type pthread_key_t = ::c_uint;
 pub type pthread_once_t = ::c_int;
 pub type pthread_spinlock_t = ::c_int;
 pub type __kernel_fsid_t = __c_anonymous__kernel_fsid_t;
+pub type __kernel_clockid_t = ::c_int;
 
 pub type __u8 = ::c_uchar;
 pub type __u16 = ::c_ushort;
@@ -829,6 +830,40 @@ s! {
         pub resolve: ::__u64,
     }
 
+    // linux/ptp_clock.h
+    pub struct ptp_clock_time {
+        pub sec: ::__s64,
+        pub nsec: ::__u32,
+        pub reserved: ::__u32,
+    }
+
+    pub struct ptp_extts_request {
+        pub index: ::c_uint,
+        pub flags: ::c_uint,
+        pub rsv: [::c_uint; 2],
+    }
+
+    pub struct ptp_sys_offset_extended {
+        pub n_samples: ::c_uint,
+        pub clockid: __kernel_clockid_t,
+        pub rsv: [::c_uint; 2],
+        pub ts: [[ptp_clock_time; 3]; PTP_MAX_SAMPLES as usize],
+    }
+
+    pub struct ptp_sys_offset_precise {
+        pub device: ptp_clock_time,
+        pub sys_realtime: ptp_clock_time,
+        pub sys_monoraw: ptp_clock_time,
+        pub rsv: [::c_uint; 4],
+    }
+
+    pub struct ptp_extts_event {
+        pub t: ptp_clock_time,
+        index: ::c_uint,
+        flags: ::c_uint,
+        rsv: [::c_uint; 2],
+    }
+
     // linux/sctp.h
 
     pub struct sctp_initmsg {
@@ -1142,6 +1177,23 @@ s! {
         pub fd: ::c_int,
         pub pid: ::c_int,
     }
+
+    // linux/ptp_clock.h
+
+    pub struct ptp_sys_offset {
+        pub n_samples: ::c_uint,
+        pub rsv: [::c_uint; 3],
+        // FIXME(garando): replace length with `2 * PTP_MAX_SAMPLES + 1` when supported
+        pub ts: [ptp_clock_time; 51],
+    }
+
+    pub struct ptp_pin_desc {
+        pub name: [::c_char; 64],
+        pub index: ::c_uint,
+        pub func: ::c_uint,
+        pub chan: ::c_uint,
+        pub rsv: [::c_uint; 5],
+    }
 }
 
 cfg_if! {
@@ -1574,6 +1626,28 @@ s_no_extra_traits! {
         pub ifr_ifrn: __c_anonymous_iwreq,
         pub u: iwreq_data,
     }
+
+    // linux/ptp_clock.h
+    #[allow(missing_debug_implementations)]
+    pub union __c_anonymous_ptp_perout_request_1 {
+        pub start: ptp_clock_time,
+        pub phase: ptp_clock_time,
+    }
+
+    #[allow(missing_debug_implementations)]
+    pub union __c_anonymous_ptp_perout_request_2 {
+        pub on: ptp_clock_time,
+        pub rsv: [::c_uint; 4],
+    }
+
+    #[allow(missing_debug_implementations)]
+    pub struct ptp_perout_request {
+        pub anonymous_1: __c_anonymous_ptp_perout_request_1,
+        pub period: ptp_clock_time,
+        pub index: ::c_uint,
+        pub flags: ::c_uint,
+        pub anonymous_2: __c_anonymous_ptp_perout_request_2,
+    }
 }
 
 cfg_if! {
@@ -4464,6 +4538,9 @@ pub const HWTSTAMP_FILTER_PTP_V2_SYNC: ::c_uint = 13;
 pub const HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: ::c_uint = 14;
 pub const HWTSTAMP_FILTER_NTP_ALL: ::c_uint = 15;
 
+// linux/ptp_clock.h
+pub const PTP_MAX_SAMPLES: ::c_uint = 25; // Maximum allowed offset measurement samples.
+
 // linux/tls.h
 pub const TLS_TX: ::c_int = 1;
 pub const TLS_RX: ::c_int = 2;