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unix: add KexecFileLoad on linux/{amd64,ppc64x,s390x}

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Add a wrapper for the kexec_file_load syscall on the architectures that
implement it (amd64, ppc64x, s390x). See
http://man7.org/linux/man-pages/man2/kexec_file_load.2.html

Change-Id: Ie29f871902176610a6ba7ed0a7bcc95c10eb172b
Reviewed-on: https://go-review.googlesource.com/c/140037
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2018-10-05 14:35:56 +02:00
committed by Tobias Klauser
parent 8469e31483
commit f81de40a84
20 changed files with 341 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
unix/mkerrors.sh
View File

@@ -193,6 +193,7 @@ struct ltchars {
#include <linux/falloc.h>
#include <linux/filter.h>
#include <linux/fs.h>
#include <linux/kexec.h>
#include <linux/keyctl.h>
#include <linux/magic.h>
#include <linux/memfd.h>
@@ -445,6 +446,7 @@ ccflags="$@"
$2 ~ /^(MS|MNT|UMOUNT)_/ ||
$2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ ||
$2 ~ /^(O|F|E?FD|NAME|S|PTRACE|PT)_/ ||
$2 ~ /^KEXEC_/ ||
$2 ~ /^LINUX_REBOOT_CMD_/ ||
$2 ~ /^LINUX_REBOOT_MAGIC[12]$/ ||
$2 !~ "NLA_TYPE_MASK" &&

13
unix/syscall_linux_amd64.go
View File

@@ -160,3 +160,16 @@ func Poll(fds []PollFd, timeout int) (n int, err error) {
}
return poll(&fds[0], len(fds), timeout)
}
//sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
cmdlineLen := len(cmdline)
if cmdlineLen > 0 {
// Account for the additional NULL byte added by
// BytePtrFromString in kexecFileLoad. The kexec_file_load
// syscall expects a NULL-terminated string.
cmdlineLen++
}
return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
}

13
unix/syscall_linux_ppc64x.go
View File

@@ -136,3 +136,16 @@ func SyncFileRange(fd int, off int64, n int64, flags int) error {
// order of their arguments.
return syncFileRange2(fd, flags, off, n)
}
//sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
cmdlineLen := len(cmdline)
if cmdlineLen > 0 {
// Account for the additional NULL byte added by
// BytePtrFromString in kexecFileLoad. The kexec_file_load
// syscall expects a NULL-terminated string.
cmdlineLen++
}
return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
}

13
unix/syscall_linux_s390x.go
View File

@@ -322,3 +322,16 @@ func Poll(fds []PollFd, timeout int) (n int, err error) {
}
return poll(&fds[0], len(fds), timeout)
}
//sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
cmdlineLen := len(cmdline)
if cmdlineLen > 0 {
// Account for the additional NULL byte added by
// BytePtrFromString in kexecFileLoad. The kexec_file_load
// syscall expects a NULL-terminated string.
cmdlineLen++
}
return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
}

20
unix/zerrors_linux_386.go
View File

@@ -879,6 +879,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_amd64.go
View File

@@ -879,6 +879,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_arm.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_arm64.go
View File

@@ -881,6 +881,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_mips.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_mips64.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_mips64le.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_mipsle.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_ppc64.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x400
IXON = 0x200
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_ppc64le.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x400
IXON = 0x200
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_riscv64.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

20
unix/zerrors_linux_s390x.go
View File

@@ -878,6 +878,26 @@ const (
IXOFF = 0x1000
IXON = 0x400
JFFS2_SUPER_MAGIC = 0x72b6
KEXEC_ARCH_386 = 0x30000
KEXEC_ARCH_68K = 0x40000
KEXEC_ARCH_AARCH64 = 0xb70000
KEXEC_ARCH_ARM = 0x280000
KEXEC_ARCH_DEFAULT = 0x0
KEXEC_ARCH_IA_64 = 0x320000
KEXEC_ARCH_MASK = 0xffff0000
KEXEC_ARCH_MIPS = 0x80000
KEXEC_ARCH_MIPS_LE = 0xa0000
KEXEC_ARCH_PPC = 0x140000
KEXEC_ARCH_PPC64 = 0x150000
KEXEC_ARCH_S390 = 0x160000
KEXEC_ARCH_SH = 0x2a0000
KEXEC_ARCH_X86_64 = 0x3e0000
KEXEC_FILE_NO_INITRAMFS = 0x4
KEXEC_FILE_ON_CRASH = 0x2
KEXEC_FILE_UNLOAD = 0x1
KEXEC_ON_CRASH = 0x1
KEXEC_PRESERVE_CONTEXT = 0x2
KEXEC_SEGMENT_MAX = 0x10
KEYCTL_ASSUME_AUTHORITY = 0x10
KEYCTL_CHOWN = 0x4
KEYCTL_CLEAR = 0x7

15
unix/zsyscall_linux_amd64.go
View File

@@ -2296,3 +2296,18 @@ func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(cmdline)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_KEXEC_FILE_LOAD, uintptr(kernelFd), uintptr(initrdFd), uintptr(cmdlineLen), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

15
unix/zsyscall_linux_ppc64.go
View File

@@ -2343,3 +2343,18 @@ func syncFileRange2(fd int, flags int, off int64, n int64) (err error) {
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(cmdline)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_KEXEC_FILE_LOAD, uintptr(kernelFd), uintptr(initrdFd), uintptr(cmdlineLen), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

15
unix/zsyscall_linux_ppc64le.go
View File

@@ -2343,3 +2343,18 @@ func syncFileRange2(fd int, flags int, off int64, n int64) (err error) {
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(cmdline)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_KEXEC_FILE_LOAD, uintptr(kernelFd), uintptr(initrdFd), uintptr(cmdlineLen), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

15
unix/zsyscall_linux_s390x.go
View File

@@ -2113,3 +2113,18 @@ func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(cmdline)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_KEXEC_FILE_LOAD, uintptr(kernelFd), uintptr(initrdFd), uintptr(cmdlineLen), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}