cubefs

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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build s390x && linux
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// +build s390x,linux
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package unix
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import (
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	"unsafe"
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)
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//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
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//sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
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//sys	Fchown(fd int, uid int, gid int) (err error)
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//sys	Fstat(fd int, stat *Stat_t) (err error)
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//sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
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//sys	Fstatfs(fd int, buf *Statfs_t) (err error)
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//sys	Ftruncate(fd int, length int64) (err error)
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//sysnb	Getegid() (egid int)
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//sysnb	Geteuid() (euid int)
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//sysnb	Getgid() (gid int)
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//sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
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//sysnb	Getuid() (uid int)
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//sys	Lchown(path string, uid int, gid int) (err error)
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//sys	Lstat(path string, stat *Stat_t) (err error)
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//sys	Pause() (err error)
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//sys	pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
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//sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
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//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
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//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
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//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
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//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
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//sys	setfsgid(gid int) (prev int, err error)
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//sys	setfsuid(uid int) (prev int, err error)
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//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
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//sys	Stat(path string, stat *Stat_t) (err error)
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//sys	Statfs(path string, buf *Statfs_t) (err error)
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//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
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//sys	Truncate(path string, length int64) (err error)
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//sys	Ustat(dev int, ubuf *Ustat_t) (err error)
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//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
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//sysnb	setgroups(n int, list *_Gid_t) (err error)
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//sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
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//sysnb	Gettimeofday(tv *Timeval) (err error)
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func Time(t *Time_t) (tt Time_t, err error) {
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	var tv Timeval
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	err = Gettimeofday(&tv)
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	if err != nil {
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		return 0, err
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	}
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	if t != nil {
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		*t = Time_t(tv.Sec)
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	}
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	return Time_t(tv.Sec), nil
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}
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//sys	Utime(path string, buf *Utimbuf) (err error)
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//sys	utimes(path string, times *[2]Timeval) (err error)
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func setTimespec(sec, nsec int64) Timespec {
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	return Timespec{Sec: sec, Nsec: nsec}
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}
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func setTimeval(sec, usec int64) Timeval {
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	return Timeval{Sec: sec, Usec: usec}
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}
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func Ioperm(from int, num int, on int) (err error) {
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	return ENOSYS
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}
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func Iopl(level int) (err error) {
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	return ENOSYS
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}
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func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr }
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func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc }
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func (iov *Iovec) SetLen(length int) {
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	iov.Len = uint64(length)
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}
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func (msghdr *Msghdr) SetControllen(length int) {
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	msghdr.Controllen = uint64(length)
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}
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func (msghdr *Msghdr) SetIovlen(length int) {
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	msghdr.Iovlen = uint64(length)
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}
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func (cmsg *Cmsghdr) SetLen(length int) {
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	cmsg.Len = uint64(length)
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}
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func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
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	rsa.Service_name_len = uint64(length)
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}
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// Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
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// mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
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func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
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	mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)}
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	r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0)
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	xaddr = uintptr(r0)
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	if e1 != 0 {
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		err = errnoErr(e1)
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	}
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	return
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}
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// On s390x Linux, all the socket calls go through an extra indirection.
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// The arguments to the underlying system call (SYS_SOCKETCALL) are the
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// number below and a pointer to an array of uintptr.
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const (
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	// see linux/net.h
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	netSocket      = 1
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	netBind        = 2
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	netConnect     = 3
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	netListen      = 4
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	netAccept      = 5
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	netGetSockName = 6
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	netGetPeerName = 7
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	netSocketPair  = 8
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	netSend        = 9
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	netRecv        = 10
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	netSendTo      = 11
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	netRecvFrom    = 12
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	netShutdown    = 13
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	netSetSockOpt  = 14
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	netGetSockOpt  = 15
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	netSendMsg     = 16
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	netRecvMsg     = 17
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	netAccept4     = 18
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	netRecvMMsg    = 19
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	netSendMMsg    = 20
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)
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func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) {
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	args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)}
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	fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return 0, err
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	}
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	return int(fd), nil
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}
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func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
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	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
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	_, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
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	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
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	_, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func socketpair(domain int, typ int, flags int, fd *[2]int32) error {
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	args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))}
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	_, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error {
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	args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
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	_, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error {
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	args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
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	_, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func socket(domain int, typ int, proto int) (int, error) {
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	args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)}
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	fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return 0, err
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	}
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	return int(fd), nil
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}
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func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error {
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	args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))}
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	_, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error {
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	args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen}
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	_, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) {
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	var base uintptr
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	if len(p) > 0 {
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		base = uintptr(unsafe.Pointer(&p[0]))
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	}
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	args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))}
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	n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return 0, err
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	}
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	return int(n), nil
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}
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func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error {
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	var base uintptr
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	if len(p) > 0 {
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		base = uintptr(unsafe.Pointer(&p[0]))
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	}
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	args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)}
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	_, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func recvmsg(s int, msg *Msghdr, flags int) (int, error) {
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	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
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	n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return 0, err
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	}
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	return int(n), nil
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}
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func sendmsg(s int, msg *Msghdr, flags int) (int, error) {
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	args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
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	n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return 0, err
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	}
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	return int(n), nil
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}
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func Listen(s int, n int) error {
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	args := [2]uintptr{uintptr(s), uintptr(n)}
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	_, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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func Shutdown(s, how int) error {
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	args := [2]uintptr{uintptr(s), uintptr(how)}
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	_, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0)
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	if err != 0 {
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		return err
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	}
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	return nil
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}
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//sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
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func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
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	cmdlineLen := len(cmdline)
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	if cmdlineLen > 0 {
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		// Account for the additional NULL byte added by
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		// BytePtrFromString in kexecFileLoad. The kexec_file_load
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		// syscall expects a NULL-terminated string.
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		cmdlineLen++
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	}
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	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
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}
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