From f845067cf72a21fb4929b0e6a35273bd83b56396 Mon Sep 17 00:00:00 2001 From: Derek McGowan Date: Sun, 9 Apr 2017 07:13:45 -0700 Subject: [PATCH] unix: add Linux CopyFileRange syscall Introduces the CopyFileRange syscall which first appears in Linux 4.5. Allows copying file content between file descriptors within the kernel without transferring data to user space. This syscall also allows the kernel to take advantage of reflinking or other fast copy methods on supported file systems. http://man7.org/linux/man-pages/man2/copy_file_range.2.html Change-Id: Id365f1e5d4d5ddf7159478e3a13084c9576ebd5c Reviewed-on: https://go-review.googlesource.com/39992 Reviewed-by: Brad Fitzpatrick --- unix/syscall_linux.go | 1 + unix/zsyscall_linux_386.go | 11 +++++++++++ unix/zsyscall_linux_amd64.go | 11 +++++++++++ unix/zsyscall_linux_arm.go | 11 +++++++++++ unix/zsyscall_linux_arm64.go | 11 +++++++++++ unix/zsyscall_linux_mips.go | 11 +++++++++++ unix/zsyscall_linux_mips64.go | 11 +++++++++++ unix/zsyscall_linux_mips64le.go | 11 +++++++++++ unix/zsyscall_linux_mipsle.go | 11 +++++++++++ unix/zsyscall_linux_ppc64.go | 11 +++++++++++ unix/zsyscall_linux_ppc64le.go | 11 +++++++++++ unix/zsyscall_linux_s390x.go | 11 +++++++++++ unix/zsyscall_linux_sparc64.go | 13 ++++++++++++- 13 files changed, 134 insertions(+), 1 deletion(-) diff --git a/unix/syscall_linux.go b/unix/syscall_linux.go index 9737e08b..8c102bc7 100644 --- a/unix/syscall_linux.go +++ b/unix/syscall_linux.go @@ -1038,6 +1038,7 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri //sys Chroot(path string) (err error) //sys ClockGettime(clockid int32, time *Timespec) (err error) //sys Close(fd int) (err error) +//sys CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) //sys Dup(oldfd int) (fd int, err error) //sys Dup3(oldfd int, newfd int, flags int) (err error) //sysnb EpollCreate(size int) (fd int, err error) diff --git a/unix/zsyscall_linux_386.go b/unix/zsyscall_linux_386.go index 41693a96..b4e9d8b3 100644 --- a/unix/zsyscall_linux_386.go +++ b/unix/zsyscall_linux_386.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_amd64.go b/unix/zsyscall_linux_amd64.go index f10621d9..3de166a5 100644 --- a/unix/zsyscall_linux_amd64.go +++ b/unix/zsyscall_linux_amd64.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_arm.go b/unix/zsyscall_linux_arm.go index fae666f6..03463aec 100644 --- a/unix/zsyscall_linux_arm.go +++ b/unix/zsyscall_linux_arm.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_arm64.go b/unix/zsyscall_linux_arm64.go index a4dca395..4f68f392 100644 --- a/unix/zsyscall_linux_arm64.go +++ b/unix/zsyscall_linux_arm64.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_mips.go b/unix/zsyscall_linux_mips.go index b56db729..73d68896 100644 --- a/unix/zsyscall_linux_mips.go +++ b/unix/zsyscall_linux_mips.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_mips64.go b/unix/zsyscall_linux_mips64.go index 1f97828a..60c9629d 100644 --- a/unix/zsyscall_linux_mips64.go +++ b/unix/zsyscall_linux_mips64.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_mips64le.go b/unix/zsyscall_linux_mips64le.go index c1fdbb55..1fc8c659 100644 --- a/unix/zsyscall_linux_mips64le.go +++ b/unix/zsyscall_linux_mips64le.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_mipsle.go b/unix/zsyscall_linux_mipsle.go index 31836d45..c5f87e63 100644 --- a/unix/zsyscall_linux_mipsle.go +++ b/unix/zsyscall_linux_mipsle.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_ppc64.go b/unix/zsyscall_linux_ppc64.go index 4a767558..cee6ec35 100644 --- a/unix/zsyscall_linux_ppc64.go +++ b/unix/zsyscall_linux_ppc64.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_ppc64le.go b/unix/zsyscall_linux_ppc64le.go index 5fb34282..f031e10a 100644 --- a/unix/zsyscall_linux_ppc64le.go +++ b/unix/zsyscall_linux_ppc64le.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_s390x.go b/unix/zsyscall_linux_s390x.go index 79d285ca..4e4728ab 100644 --- a/unix/zsyscall_linux_s390x.go +++ b/unix/zsyscall_linux_s390x.go @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0) diff --git a/unix/zsyscall_linux_sparc64.go b/unix/zsyscall_linux_sparc64.go index ce3ec585..2dd98434 100644 --- a/unix/zsyscall_linux_sparc64.go +++ b/unix/zsyscall_linux_sparc64.go @@ -1,5 +1,5 @@ // mksyscall.pl -tags linux,sparc64 syscall_linux.go syscall_linux_sparc64.go -// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT +// Code generated by the command above; see README.md. DO NOT EDIT. // +build linux,sparc64 @@ -312,6 +312,17 @@ func Close(fd int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) { + r0, _, e1 := Syscall6(SYS_COPY_FILE_RANGE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(oldfd int) (fd int, err error) { r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0) fd = int(r0)