Auto merge of #2899 - devnexen:linux_fileclone, r=JohnTitor

linux add FICLONE* ioctl.

Author: bors

libc-test/semver/linux-gnu-x86_64.txt

@@ -1,3 +1,5 @@
+FICLONE
+FICLONERANGE
 KEYCTL_CAPABILITIES
 KEYCTL_CAPS0_BIG_KEY
 KEYCTL_CAPS0_CAPABILITIES

libc-test/semver/linux.txt

@@ -2909,6 +2909,7 @@ ff_rumble_effect
 ff_trigger
 fgetpos64
 fgetxattr
+file_clone_range
 flistxattr
 fmemopen
 fopen64

src/unix/linux_like/linux/arch/generic/mod.rs

@@ -104,6 +104,13 @@ cfg_if! {
         pub const SO_DETACH_REUSEPORT_BPF: ::c_int = 68;
     }
 }
+
+cfg_if! {
+    if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
+        pub const FICLONE: ::c_ulong = 0x40049409;
+        pub const FICLONERANGE: ::c_ulong = 0x4020940D;
+    }
+}
 // pub const SO_PREFER_BUSY_POLL: ::c_int = 69;
 // pub const SO_BUSY_POLL_BUDGET: ::c_int = 70;
 

src/unix/linux_like/linux/mod.rs

@@ -596,6 +596,13 @@ s! {
         pub nla_len: u16,
         pub nla_type: u16,
     }
+
+    pub struct file_clone_range {
+        pub src_fd: ::__s64,
+        pub src_offset: ::__u64,
+        pub src_length: ::__u64,
+        pub dest_offset: ::__u64,
+    }
 }
 
 s_no_extra_traits! {

src/unix/linux_like/linux/musl/b32/mod.rs

@@ -3,6 +3,7 @@ pub type c_ulong = u32;
 pub type nlink_t = u32;
 pub type blksize_t = ::c_long;
 pub type __u64 = ::c_ulonglong;
+pub type __s64 = ::c_longlong;
 pub type regoff_t = ::c_int;
 
 s! {

src/unix/linux_like/linux/musl/b64/aarch64/mod.rs

@@ -1,5 +1,6 @@
 pub type c_char = u8;
 pub type __u64 = ::c_ulonglong;
+pub type __s64 = ::c_longlong;
 pub type wchar_t = u32;
 pub type nlink_t = u32;
 pub type blksize_t = ::c_int;

src/unix/linux_like/linux/musl/b64/mips64.rs

@@ -1,6 +1,7 @@
 pub type c_char = i8;
 pub type wchar_t = i32;
 pub type __u64 = ::c_ulong;
+pub type __s64 = ::c_long;
 pub type nlink_t = u64;
 pub type blksize_t = i64;
 

src/unix/linux_like/linux/musl/b64/powerpc64.rs

@@ -1,6 +1,7 @@
 pub type c_char = u8;
 pub type wchar_t = i32;
 pub type __u64 = ::c_ulong;
+pub type __s64 = ::c_long;
 pub type nlink_t = u64;
 pub type blksize_t = ::c_long;
 

src/unix/linux_like/linux/musl/b64/riscv64/mod.rs

@@ -8,6 +8,7 @@ pub type blksize_t = ::c_int;
 pub type fsblkcnt64_t = ::c_ulong;
 pub type fsfilcnt64_t = ::c_ulong;
 pub type __u64 = ::c_ulonglong;
+pub type __s64 = ::c_longlong;
 
 s! {
     pub struct pthread_attr_t {

src/unix/linux_like/linux/musl/b64/s390x.rs

@@ -4,6 +4,7 @@ pub type nlink_t = u64;
 pub type wchar_t = i32;
 pub type greg_t = u64;
 pub type __u64 = u64;
+pub type __s64 = i64;
 
 s! {
     pub struct ipc_perm {

src/unix/linux_like/linux/musl/b64/x86_64/mod.rs

@@ -3,6 +3,7 @@ pub type wchar_t = i32;
 pub type nlink_t = u64;
 pub type blksize_t = ::c_long;
 pub type __u64 = ::c_ulonglong;
+pub type __s64 = ::c_longlong;
 pub type greg_t = i64;
 
 s! {

src/unix/linux_like/linux/uclibc/arm/mod.rs

@@ -19,6 +19,7 @@ pub type blkcnt_t = ::c_long;
 pub type fsblkcnt64_t = u64;
 pub type fsfilcnt64_t = u64;
 pub type __u64 = ::c_ulonglong;
+pub type __s64 = ::c_longlong;
 
 s! {
     pub struct cmsghdr {

src/unix/linux_like/linux/uclibc/x86_64/mod.rs

@@ -20,6 +20,7 @@ pub type wchar_t = ::c_int;
 pub type fsblkcnt64_t = u64;
 pub type fsfilcnt64_t = u64;
 pub type __u64 = ::c_ulong;
+pub type __s64 = ::c_long;
 
 s! {
     pub struct ipc_perm {