// Copyright 2020 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build zos && s390x // +build zos,s390x package unix import ( "bytes" "fmt" "runtime" "sort" "strings" "sync" "syscall" "unsafe" ) const ( O_CLOEXEC = 0 // Dummy value (not supported). AF_LOCAL = AF_UNIX // AF_LOCAL is an alias for AF_UNIX ) func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) func syscall_rawsyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) func syscall_syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) func syscall_rawsyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) func syscall_syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) func syscall_rawsyscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) func copyStat(stat *Stat_t, statLE *Stat_LE_t) { stat.Dev = uint64(statLE.Dev) stat.Ino = uint64(statLE.Ino) stat.Nlink = uint64(statLE.Nlink) stat.Mode = uint32(statLE.Mode) stat.Uid = uint32(statLE.Uid) stat.Gid = uint32(statLE.Gid) stat.Rdev = uint64(statLE.Rdev) stat.Size = statLE.Size stat.Atim.Sec = int64(statLE.Atim) stat.Atim.Nsec = 0 //zos doesn't return nanoseconds stat.Mtim.Sec = int64(statLE.Mtim) stat.Mtim.Nsec = 0 //zos doesn't return nanoseconds stat.Ctim.Sec = int64(statLE.Ctim) stat.Ctim.Nsec = 0 //zos doesn't return nanoseconds stat.Blksize = int64(statLE.Blksize) stat.Blocks = statLE.Blocks } func svcCall(fnptr unsafe.Pointer, argv *unsafe.Pointer, dsa *uint64) func svcLoad(name *byte) unsafe.Pointer func svcUnload(name *byte, fnptr unsafe.Pointer) int64 func (d *Dirent) NameString() string { if d == nil { return "" } s := string(d.Name[:]) idx := strings.IndexByte(s, 0) if idx == -1 { return s } else { return s[:idx] } } func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { if sa.Port < 0 || sa.Port > 0xFFFF { return nil, 0, EINVAL } sa.raw.Len = SizeofSockaddrInet4 sa.raw.Family = AF_INET p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) p[0] = byte(sa.Port >> 8) p[1] = byte(sa.Port) sa.raw.Addr = sa.Addr return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil } func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { if sa.Port < 0 || sa.Port > 0xFFFF { return nil, 0, EINVAL } sa.raw.Len = SizeofSockaddrInet6 sa.raw.Family = AF_INET6 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) p[0] = byte(sa.Port >> 8) p[1] = byte(sa.Port) sa.raw.Scope_id = sa.ZoneId sa.raw.Addr = sa.Addr return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil } func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { name := sa.Name n := len(name) if n >= len(sa.raw.Path) || n == 0 { return nil, 0, EINVAL } sa.raw.Len = byte(3 + n) // 2 for Family, Len; 1 for NUL sa.raw.Family = AF_UNIX for i := 0; i < n; i++ { sa.raw.Path[i] = int8(name[i]) } return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil } func anyToSockaddr(_ int, rsa *RawSockaddrAny) (Sockaddr, error) { // TODO(neeilan): Implement use of first param (fd) switch rsa.Addr.Family { case AF_UNIX: pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) sa := new(SockaddrUnix) // For z/OS, only replace NUL with @ when the // length is not zero. if pp.Len != 0 && pp.Path[0] == 0 { // "Abstract" Unix domain socket. // Rewrite leading NUL as @ for textual display. // (This is the standard convention.) // Not friendly to overwrite in place, // but the callers below don't care. pp.Path[0] = '@' } // Assume path ends at NUL. // // For z/OS, the length of the name is a field // in the structure. To be on the safe side, we // will still scan the name for a NUL but only // to the length provided in the structure. // // This is not technically the Linux semantics for // abstract Unix domain sockets--they are supposed // to be uninterpreted fixed-size binary blobs--but // everyone uses this convention. n := 0 for n < int(pp.Len) && pp.Path[n] != 0 { n++ } bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] sa.Name = string(bytes) return sa, nil case AF_INET: pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) sa := new(SockaddrInet4) p := (*[2]byte)(unsafe.Pointer(&pp.Port)) sa.Port = int(p[0])<<8 + int(p[1]) sa.Addr = pp.Addr return sa, nil case AF_INET6: pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) sa := new(SockaddrInet6) p := (*[2]byte)(unsafe.Pointer(&pp.Port)) sa.Port = int(p[0])<<8 + int(p[1]) sa.ZoneId = pp.Scope_id sa.Addr = pp.Addr return sa, nil } return nil, EAFNOSUPPORT } func Accept(fd int) (nfd int, sa Sockaddr, err error) { var rsa RawSockaddrAny var len _Socklen = SizeofSockaddrAny nfd, err = accept(fd, &rsa, &len) if err != nil { return } // TODO(neeilan): Remove 0 in call sa, err = anyToSockaddr(0, &rsa) if err != nil { Close(nfd) nfd = 0 } return } func (iov *Iovec) SetLen(length int) { iov.Len = uint64(length) } func (msghdr *Msghdr) SetControllen(length int) { msghdr.Controllen = int32(length) } func (cmsg *Cmsghdr) SetLen(length int) { cmsg.Len = int32(length) } //sys fcntl(fd int, cmd int, arg int) (val int, err error) //sys read(fd int, p []byte) (n int, err error) //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ //sys write(fd int, p []byte) (n int, err error) //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) = SYS___ACCEPT_A //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = SYS___BIND_A //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = SYS___CONNECT_A //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) //sysnb setgroups(n int, list *_Gid_t) (err error) //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) //sysnb socket(domain int, typ int, proto int) (fd int, err error) //sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = SYS___GETPEERNAME_A //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = SYS___GETSOCKNAME_A //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) = SYS___RECVFROM_A //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) = SYS___SENDTO_A //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = SYS___RECVMSG_A //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = SYS___SENDMSG_A //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) = SYS_MMAP //sys munmap(addr uintptr, length uintptr) (err error) = SYS_MUNMAP //sys ioctl(fd int, req uint, arg uintptr) (err error) = SYS_IOCTL //sys Access(path string, mode uint32) (err error) = SYS___ACCESS_A //sys Chdir(path string) (err error) = SYS___CHDIR_A //sys Chown(path string, uid int, gid int) (err error) = SYS___CHOWN_A //sys Chmod(path string, mode uint32) (err error) = SYS___CHMOD_A //sys Creat(path string, mode uint32) (fd int, err error) = SYS___CREAT_A //sys Dup(oldfd int) (fd int, err error) //sys Dup2(oldfd int, newfd int) (err error) //sys Errno2() (er2 int) = SYS___ERRNO2 //sys Err2ad() (eadd *int) = SYS___ERR2AD //sys Exit(code int) //sys Fchdir(fd int) (err error) //sys Fchmod(fd int, mode uint32) (err error) //sys Fchown(fd int, uid int, gid int) (err error) //sys FcntlInt(fd uintptr, cmd int, arg int) (retval int, err error) = SYS_FCNTL //sys fstat(fd int, stat *Stat_LE_t) (err error) func Fstat(fd int, stat *Stat_t) (err error) { var statLE Stat_LE_t err = fstat(fd, &statLE) copyStat(stat, &statLE) return } //sys Fstatvfs(fd int, stat *Statvfs_t) (err error) = SYS_FSTATVFS //sys Fsync(fd int) (err error) //sys Ftruncate(fd int, length int64) (err error) //sys Getpagesize() (pgsize int) = SYS_GETPAGESIZE //sys Mprotect(b []byte, prot int) (err error) = SYS_MPROTECT //sys Msync(b []byte, flags int) (err error) = SYS_MSYNC //sys Poll(fds []PollFd, timeout int) (n int, err error) = SYS_POLL //sys Times(tms *Tms) (ticks uintptr, err error) = SYS_TIMES //sys W_Getmntent(buff *byte, size int) (lastsys int, err error) = SYS_W_GETMNTENT //sys W_Getmntent_A(buff *byte, size int) (lastsys int, err error) = SYS___W_GETMNTENT_A //sys mount_LE(path string, filesystem string, fstype string, mtm uint32, parmlen int32, parm string) (err error) = SYS___MOUNT_A //sys unmount(filesystem string, mtm int) (err error) = SYS___UMOUNT_A //sys Chroot(path string) (err error) = SYS___CHROOT_A //sys Select(nmsgsfds int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (ret int, err error) = SYS_SELECT //sysnb Uname(buf *Utsname) (err error) = SYS___UNAME_A func Ptsname(fd int) (name string, err error) { r0, _, e1 := syscall_syscall(SYS___PTSNAME_A, uintptr(fd), 0, 0) name = u2s(unsafe.Pointer(r0)) if e1 != 0 { err = errnoErr(e1) } return } func u2s(cstr unsafe.Pointer) string { str := (*[1024]uint8)(cstr) i := 0 for str[i] != 0 { i++ } return string(str[:i]) } func Close(fd int) (err error) { _, _, e1 := syscall_syscall(SYS_CLOSE, uintptr(fd), 0, 0) for i := 0; e1 == EAGAIN && i < 10; i++ { _, _, _ = syscall_syscall(SYS_USLEEP, uintptr(10), 0, 0) _, _, e1 = syscall_syscall(SYS_CLOSE, uintptr(fd), 0, 0) } if e1 != 0 { err = errnoErr(e1) } return } var mapper = &mmapper{ active: make(map[*byte][]byte), mmap: mmap, munmap: munmap, } // Dummy function: there are no semantics for Madvise on z/OS func Madvise(b []byte, advice int) (err error) { return } func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { return mapper.Mmap(fd, offset, length, prot, flags) } func Munmap(b []byte) (err error) { return mapper.Munmap(b) } //sys Gethostname(buf []byte) (err error) = SYS___GETHOSTNAME_A //sysnb Getegid() (egid int) //sysnb Geteuid() (uid int) //sysnb Getgid() (gid int) //sysnb Getpid() (pid int) //sysnb Getpgid(pid int) (pgid int, err error) = SYS_GETPGID func Getpgrp() (pid int) { pid, _ = Getpgid(0) return } //sysnb Getppid() (pid int) //sys Getpriority(which int, who int) (prio int, err error) //sysnb Getrlimit(resource int, rlim *Rlimit) (err error) = SYS_GETRLIMIT //sysnb getrusage(who int, rusage *rusage_zos) (err error) = SYS_GETRUSAGE func Getrusage(who int, rusage *Rusage) (err error) { var ruz rusage_zos err = getrusage(who, &ruz) //Only the first two fields of Rusage are set rusage.Utime.Sec = ruz.Utime.Sec rusage.Utime.Usec = int64(ruz.Utime.Usec) rusage.Stime.Sec = ruz.Stime.Sec rusage.Stime.Usec = int64(ruz.Stime.Usec) return } //sysnb Getsid(pid int) (sid int, err error) = SYS_GETSID //sysnb Getuid() (uid int) //sysnb Kill(pid int, sig Signal) (err error) //sys Lchown(path string, uid int, gid int) (err error) = SYS___LCHOWN_A //sys Link(path string, link string) (err error) = SYS___LINK_A //sys Listen(s int, n int) (err error) //sys lstat(path string, stat *Stat_LE_t) (err error) = SYS___LSTAT_A func Lstat(path string, stat *Stat_t) (err error) { var statLE Stat_LE_t err = lstat(path, &statLE) copyStat(stat, &statLE) return } //sys Mkdir(path string, mode uint32) (err error) = SYS___MKDIR_A //sys Mkfifo(path string, mode uint32) (err error) = SYS___MKFIFO_A //sys Mknod(path string, mode uint32, dev int) (err error) = SYS___MKNOD_A //sys Pread(fd int, p []byte, offset int64) (n int, err error) //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) //sys Readlink(path string, buf []byte) (n int, err error) = SYS___READLINK_A //sys Rename(from string, to string) (err error) = SYS___RENAME_A //sys Rmdir(path string) (err error) = SYS___RMDIR_A //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK //sys Setpriority(which int, who int, prio int) (err error) //sysnb Setpgid(pid int, pgid int) (err error) = SYS_SETPGID //sysnb Setrlimit(resource int, lim *Rlimit) (err error) //sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID //sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID //sysnb Setsid() (pid int, err error) = SYS_SETSID //sys Setuid(uid int) (err error) = SYS_SETUID //sys Setgid(uid int) (err error) = SYS_SETGID //sys Shutdown(fd int, how int) (err error) //sys stat(path string, statLE *Stat_LE_t) (err error) = SYS___STAT_A func Stat(path string, sta *Stat_t) (err error) { var statLE Stat_LE_t err = stat(path, &statLE) copyStat(sta, &statLE) return } //sys Symlink(path string, link string) (err error) = SYS___SYMLINK_A //sys Sync() = SYS_SYNC //sys Truncate(path string, length int64) (err error) = SYS___TRUNCATE_A //sys Tcgetattr(fildes int, termptr *Termios) (err error) = SYS_TCGETATTR //sys Tcsetattr(fildes int, when int, termptr *Termios) (err error) = SYS_TCSETATTR //sys Umask(mask int) (oldmask int) //sys Unlink(path string) (err error) = SYS___UNLINK_A //sys Utime(path string, utim *Utimbuf) (err error) = SYS___UTIME_A //sys open(path string, mode int, perm uint32) (fd int, err error) = SYS___OPEN_A func Open(path string, mode int, perm uint32) (fd int, err error) { return open(path, mode, perm) } func Mkfifoat(dirfd int, path string, mode uint32) (err error) { wd, err := Getwd() if err != nil { return err } if err := Fchdir(dirfd); err != nil { return err } defer Chdir(wd) return Mkfifo(path, mode) } //sys remove(path string) (err error) func Remove(path string) error { return remove(path) } const ImplementsGetwd = true func Getcwd(buf []byte) (n int, err error) { var p unsafe.Pointer if len(buf) > 0 { p = unsafe.Pointer(&buf[0]) } else { p = unsafe.Pointer(&_zero) } _, _, e := syscall_syscall(SYS___GETCWD_A, uintptr(p), uintptr(len(buf)), 0) n = clen(buf) + 1 if e != 0 { err = errnoErr(e) } return } func Getwd() (wd string, err error) { var buf [PathMax]byte n, err := Getcwd(buf[0:]) if err != nil { return "", err } // Getcwd returns the number of bytes written to buf, including the NUL. if n < 1 || n > len(buf) || buf[n-1] != 0 { return "", EINVAL } return string(buf[0 : n-1]), nil } func Getgroups() (gids []int, err error) { n, err := getgroups(0, nil) if err != nil { return nil, err } if n == 0 { return nil, nil } // Sanity check group count. Max is 1<<16 on Linux. if n < 0 || n > 1<<20 { return nil, EINVAL } a := make([]_Gid_t, n) n, err = getgroups(n, &a[0]) if err != nil { return nil, err } gids = make([]int, n) for i, v := range a[0:n] { gids[i] = int(v) } return } func Setgroups(gids []int) (err error) { if len(gids) == 0 { return setgroups(0, nil) } a := make([]_Gid_t, len(gids)) for i, v := range gids { a[i] = _Gid_t(v) } return setgroups(len(a), &a[0]) } func gettid() uint64 func Gettid() (tid int) { return int(gettid()) } type WaitStatus uint32 // Wait status is 7 bits at bottom, either 0 (exited), // 0x7F (stopped), or a signal number that caused an exit. // The 0x80 bit is whether there was a core dump. // An extra number (exit code, signal causing a stop) // is in the high bits. At least that's the idea. // There are various irregularities. For example, the // "continued" status is 0xFFFF, distinguishing itself // from stopped via the core dump bit. const ( mask = 0x7F core = 0x80 exited = 0x00 stopped = 0x7F shift = 8 ) func (w WaitStatus) Exited() bool { return w&mask == exited } func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != exited } func (w WaitStatus) Stopped() bool { return w&0xFF == stopped } func (w WaitStatus) Continued() bool { return w == 0xFFFF } func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 } func (w WaitStatus) ExitStatus() int { if !w.Exited() { return -1 } return int(w>>shift) & 0xFF } func (w WaitStatus) Signal() Signal { if !w.Signaled() { return -1 } return Signal(w & mask) } func (w WaitStatus) StopSignal() Signal { if !w.Stopped() { return -1 } return Signal(w>>shift) & 0xFF } func (w WaitStatus) TrapCause() int { return -1 } //sys waitpid(pid int, wstatus *_C_int, options int) (wpid int, err error) func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) { // TODO(mundaym): z/OS doesn't have wait4. I don't think getrusage does what we want. // At the moment rusage will not be touched. var status _C_int wpid, err = waitpid(pid, &status, options) if wstatus != nil { *wstatus = WaitStatus(status) } return } //sysnb gettimeofday(tv *timeval_zos) (err error) func Gettimeofday(tv *Timeval) (err error) { var tvz timeval_zos err = gettimeofday(&tvz) tv.Sec = tvz.Sec tv.Usec = int64(tvz.Usec) return } func Time(t *Time_t) (tt Time_t, err error) { var tv Timeval err = Gettimeofday(&tv) if err != nil { return 0, err } if t != nil { *t = Time_t(tv.Sec) } return Time_t(tv.Sec), nil } func setTimespec(sec, nsec int64) Timespec { return Timespec{Sec: sec, Nsec: nsec} } func setTimeval(sec, usec int64) Timeval { //fix return Timeval{Sec: sec, Usec: usec} } //sysnb pipe(p *[2]_C_int) (err error) func Pipe(p []int) (err error) { if len(p) != 2 { return EINVAL } var pp [2]_C_int err = pipe(&pp) if err == nil { p[0] = int(pp[0]) p[1] = int(pp[1]) } return } //sys utimes(path string, timeval *[2]Timeval) (err error) = SYS___UTIMES_A func Utimes(path string, tv []Timeval) (err error) { if len(tv) != 2 { return EINVAL } return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) } func UtimesNano(path string, ts []Timespec) error { if len(ts) != 2 { return EINVAL } // Not as efficient as it could be because Timespec and // Timeval have different types in the different OSes tv := [2]Timeval{ NsecToTimeval(TimespecToNsec(ts[0])), NsecToTimeval(TimespecToNsec(ts[1])), } return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) } func Getsockname(fd int) (sa Sockaddr, err error) { var rsa RawSockaddrAny var len _Socklen = SizeofSockaddrAny if err = getsockname(fd, &rsa, &len); err != nil { return } // TODO(neeilan) : Remove this 0 ( added to get sys/unix compiling on z/OS ) return anyToSockaddr(0, &rsa) } const ( // identifier constants nwmHeaderIdentifier = 0xd5e6d4c8 nwmFilterIdentifier = 0xd5e6d4c6 nwmTCPConnIdentifier = 0xd5e6d4c3 nwmRecHeaderIdentifier = 0xd5e6d4d9 nwmIPStatsIdentifier = 0xd5e6d4c9d7e2e340 nwmIPGStatsIdentifier = 0xd5e6d4c9d7c7e2e3 nwmTCPStatsIdentifier = 0xd5e6d4e3c3d7e2e3 nwmUDPStatsIdentifier = 0xd5e6d4e4c4d7e2e3 nwmICMPGStatsEntry = 0xd5e6d4c9c3d4d7c7 nwmICMPTStatsEntry = 0xd5e6d4c9c3d4d7e3 // nwmHeader constants nwmVersion1 = 1 nwmVersion2 = 2 nwmCurrentVer = 2 nwmTCPConnType = 1 nwmGlobalStatsType = 14 // nwmFilter constants nwmFilterLclAddrMask = 0x20000000 // Local address nwmFilterSrcAddrMask = 0x20000000 // Source address nwmFilterLclPortMask = 0x10000000 // Local port nwmFilterSrcPortMask = 0x10000000 // Source port // nwmConnEntry constants nwmTCPStateClosed = 1 nwmTCPStateListen = 2 nwmTCPStateSynSent = 3 nwmTCPStateSynRcvd = 4 nwmTCPStateEstab = 5 nwmTCPStateFinWait1 = 6 nwmTCPStateFinWait2 = 7 nwmTCPStateClosWait = 8 nwmTCPStateLastAck = 9 nwmTCPStateClosing = 10 nwmTCPStateTimeWait = 11 nwmTCPStateDeletTCB = 12 // Existing constants on linux BPF_TCP_CLOSE = 1 BPF_TCP_LISTEN = 2 BPF_TCP_SYN_SENT = 3 BPF_TCP_SYN_RECV = 4 BPF_TCP_ESTABLISHED = 5 BPF_TCP_FIN_WAIT1 = 6 BPF_TCP_FIN_WAIT2 = 7 BPF_TCP_CLOSE_WAIT = 8 BPF_TCP_LAST_ACK = 9 BPF_TCP_CLOSING = 10 BPF_TCP_TIME_WAIT = 11 BPF_TCP_NEW_SYN_RECV = -1 BPF_TCP_MAX_STATES = -2 ) type nwmTriplet struct { offset uint32 length uint32 number uint32 } type nwmQuadruplet struct { offset uint32 length uint32 number uint32 match uint32 } type nwmHeader struct { ident uint32 length uint32 version uint16 nwmType uint16 bytesNeeded uint32 options uint32 _ [16]byte inputDesc nwmTriplet outputDesc nwmQuadruplet } type nwmFilter struct { ident uint32 flags uint32 resourceName [8]byte resourceId uint32 listenerId uint32 local [28]byte // union of sockaddr4 and sockaddr6 remote [28]byte // union of sockaddr4 and sockaddr6 _ uint16 _ uint16 asid uint16 _ [2]byte tnLuName [8]byte tnMonGrp uint32 tnAppl [8]byte applData [40]byte nInterface [16]byte dVipa [16]byte dVipaPfx uint16 dVipaPort uint16 dVipaFamily byte _ [3]byte destXCF [16]byte destXCFPfx uint16 destXCFFamily byte _ [1]byte targIP [16]byte targIPPfx uint16 targIPFamily byte _ [1]byte _ [20]byte } type nwmRecHeader struct { ident uint32 length uint32 number byte _ [3]byte } type nwmTCPStatsEntry struct { ident uint64 currEstab uint32 activeOpened uint32 passiveOpened uint32 connClosed uint32 estabResets uint32 attemptFails uint32 passiveDrops uint32 timeWaitReused uint32 inSegs uint64 predictAck uint32 predictData uint32 inDupAck uint32 inBadSum uint32 inBadLen uint32 inShort uint32 inDiscOldTime uint32 inAllBeforeWin uint32 inSomeBeforeWin uint32 inAllAfterWin uint32 inSomeAfterWin uint32 inOutOfOrder uint32 inAfterClose uint32 inWinProbes uint32 inWinUpdates uint32 outWinUpdates uint32 outSegs uint64 outDelayAcks uint32 outRsts uint32 retransSegs uint32 retransTimeouts uint32 retransDrops uint32 pmtuRetrans uint32 pmtuErrors uint32 outWinProbes uint32 probeDrops uint32 keepAliveProbes uint32 keepAliveDrops uint32 finwait2Drops uint32 acceptCount uint64 inBulkQSegs uint64 inDiscards uint64 connFloods uint32 connStalls uint32 cfgEphemDef uint16 ephemInUse uint16 ephemHiWater uint16 flags byte _ [1]byte ephemExhaust uint32 smcRCurrEstabLnks uint32 smcRLnkActTimeOut uint32 smcRActLnkOpened uint32 smcRPasLnkOpened uint32 smcRLnksClosed uint32 smcRCurrEstab uint32 smcRActiveOpened uint32 smcRPassiveOpened uint32 smcRConnClosed uint32 smcRInSegs uint64 smcROutSegs uint64 smcRInRsts uint32 smcROutRsts uint32 smcDCurrEstabLnks uint32 smcDActLnkOpened uint32 smcDPasLnkOpened uint32 smcDLnksClosed uint32 smcDCurrEstab uint32 smcDActiveOpened uint32 smcDPassiveOpened uint32 smcDConnClosed uint32 smcDInSegs uint64 smcDOutSegs uint64 smcDInRsts uint32 smcDOutRsts uint32 } type nwmConnEntry struct { ident uint32 local [28]byte // union of sockaddr4 and sockaddr6 remote [28]byte // union of sockaddr4 and sockaddr6 startTime [8]byte // uint64, changed to prevent padding from being inserted lastActivity [8]byte // uint64 bytesIn [8]byte // uint64 bytesOut [8]byte // uint64 inSegs [8]byte // uint64 outSegs [8]byte // uint64 state uint16 activeOpen byte flag01 byte outBuffered uint32 inBuffered uint32 maxSndWnd uint32 reXmtCount uint32 congestionWnd uint32 ssThresh uint32 roundTripTime uint32 roundTripVar uint32 sendMSS uint32 sndWnd uint32 rcvBufSize uint32 sndBufSize uint32 outOfOrderCount uint32 lcl0WindowCount uint32 rmt0WindowCount uint32 dupacks uint32 flag02 byte sockOpt6Cont byte asid uint16 resourceName [8]byte resourceId uint32 subtask uint32 sockOpt byte sockOpt6 byte clusterConnFlag byte proto byte targetAppl [8]byte luName [8]byte clientUserId [8]byte logMode [8]byte timeStamp uint32 timeStampAge uint32 serverResourceId uint32 intfName [16]byte ttlsStatPol byte ttlsStatConn byte ttlsSSLProt uint16 ttlsNegCiph [2]byte ttlsSecType byte ttlsFIPS140Mode byte ttlsUserID [8]byte applData [40]byte inOldestTime [8]byte // uint64 outOldestTime [8]byte // uint64 tcpTrustedPartner byte _ [3]byte bulkDataIntfName [16]byte ttlsNegCiph4 [4]byte smcReason uint32 lclSMCLinkId uint32 rmtSMCLinkId uint32 smcStatus byte smcFlags byte _ [2]byte rcvWnd uint32 lclSMCBufSz uint32 rmtSMCBufSz uint32 ttlsSessID [32]byte ttlsSessIDLen int16 _ [1]byte smcDStatus byte smcDReason uint32 } var svcNameTable [][]byte = [][]byte{ []byte("\xc5\xe9\xc2\xd5\xd4\xc9\xc6\xf4"), // svc_EZBNMIF4 } const ( svc_EZBNMIF4 = 0 ) func GetsockoptTCPInfo(fd, level, opt int) (*TCPInfo, error) { jobname := []byte("\x5c\x40\x40\x40\x40\x40\x40\x40") // "*" responseBuffer := [4096]byte{0} var bufferAlet, reasonCode uint32 = 0, 0 var bufferLen, returnValue, returnCode int32 = 4096, 0, 0 dsa := [18]uint64{0} var argv [7]unsafe.Pointer argv[0] = unsafe.Pointer(&jobname[0]) argv[1] = unsafe.Pointer(&responseBuffer[0]) argv[2] = unsafe.Pointer(&bufferAlet) argv[3] = unsafe.Pointer(&bufferLen) argv[4] = unsafe.Pointer(&returnValue) argv[5] = unsafe.Pointer(&returnCode) argv[6] = unsafe.Pointer(&reasonCode) request := (*struct { header nwmHeader filter nwmFilter })(unsafe.Pointer(&responseBuffer[0])) EZBNMIF4 := svcLoad(&svcNameTable[svc_EZBNMIF4][0]) if EZBNMIF4 == nil { return nil, errnoErr(EINVAL) } // GetGlobalStats EZBNMIF4 call request.header.ident = nwmHeaderIdentifier request.header.length = uint32(unsafe.Sizeof(request.header)) request.header.version = nwmCurrentVer request.header.nwmType = nwmGlobalStatsType request.header.options = 0x80000000 svcCall(EZBNMIF4, &argv[0], &dsa[0]) // outputDesc field is filled by EZBNMIF4 on success if returnCode != 0 || request.header.outputDesc.offset == 0 { return nil, errnoErr(EINVAL) } // Check that EZBNMIF4 returned a nwmRecHeader recHeader := (*nwmRecHeader)(unsafe.Pointer(&responseBuffer[request.header.outputDesc.offset])) if recHeader.ident != nwmRecHeaderIdentifier { return nil, errnoErr(EINVAL) } // Parse nwmTriplets to get offsets of returned entries var sections []*uint64 var sectionDesc *nwmTriplet = (*nwmTriplet)(unsafe.Pointer(&responseBuffer[0])) for i := uint32(0); i < uint32(recHeader.number); i++ { offset := request.header.outputDesc.offset + uint32(unsafe.Sizeof(*recHeader)) + i*uint32(unsafe.Sizeof(*sectionDesc)) sectionDesc = (*nwmTriplet)(unsafe.Pointer(&responseBuffer[offset])) for j := uint32(0); j < sectionDesc.number; j++ { offset = request.header.outputDesc.offset + sectionDesc.offset + j*sectionDesc.length sections = append(sections, (*uint64)(unsafe.Pointer(&responseBuffer[offset]))) } } // Find nwmTCPStatsEntry in returned entries var tcpStats *nwmTCPStatsEntry = nil for _, ptr := range sections { switch *ptr { case nwmTCPStatsIdentifier: if tcpStats != nil { return nil, errnoErr(EINVAL) } tcpStats = (*nwmTCPStatsEntry)(unsafe.Pointer(ptr)) case nwmIPStatsIdentifier: case nwmIPGStatsIdentifier: case nwmUDPStatsIdentifier: case nwmICMPGStatsEntry: case nwmICMPTStatsEntry: default: return nil, errnoErr(EINVAL) } } if tcpStats == nil { return nil, errnoErr(EINVAL) } // GetConnectionDetail EZBNMIF4 call responseBuffer = [4096]byte{0} dsa = [18]uint64{0} bufferAlet, reasonCode = 0, 0 bufferLen, returnValue, returnCode = 4096, 0, 0 nameptr := (*uint32)(unsafe.Pointer(uintptr(0x21c))) // Get jobname of current process nameptr = (*uint32)(unsafe.Pointer(uintptr(*nameptr + 12))) argv[0] = unsafe.Pointer(uintptr(*nameptr)) request.header.ident = nwmHeaderIdentifier request.header.length = uint32(unsafe.Sizeof(request.header)) request.header.version = nwmCurrentVer request.header.nwmType = nwmTCPConnType request.header.options = 0x80000000 request.filter.ident = nwmFilterIdentifier var localSockaddr RawSockaddrAny socklen := _Socklen(SizeofSockaddrAny) err := getsockname(fd, &localSockaddr, &socklen) if err != nil { return nil, errnoErr(EINVAL) } if localSockaddr.Addr.Family == AF_INET { localSockaddr := (*RawSockaddrInet4)(unsafe.Pointer(&localSockaddr.Addr)) localSockFilter := (*RawSockaddrInet4)(unsafe.Pointer(&request.filter.local[0])) localSockFilter.Family = AF_INET var i int for i = 0; i < 4; i++ { if localSockaddr.Addr[i] != 0 { break } } if i != 4 { request.filter.flags |= nwmFilterLclAddrMask for i = 0; i < 4; i++ { localSockFilter.Addr[i] = localSockaddr.Addr[i] } } if localSockaddr.Port != 0 { request.filter.flags |= nwmFilterLclPortMask localSockFilter.Port = localSockaddr.Port } } else if localSockaddr.Addr.Family == AF_INET6 { localSockaddr := (*RawSockaddrInet6)(unsafe.Pointer(&localSockaddr.Addr)) localSockFilter := (*RawSockaddrInet6)(unsafe.Pointer(&request.filter.local[0])) localSockFilter.Family = AF_INET6 var i int for i = 0; i < 16; i++ { if localSockaddr.Addr[i] != 0 { break } } if i != 16 { request.filter.flags |= nwmFilterLclAddrMask for i = 0; i < 16; i++ { localSockFilter.Addr[i] = localSockaddr.Addr[i] } } if localSockaddr.Port != 0 { request.filter.flags |= nwmFilterLclPortMask localSockFilter.Port = localSockaddr.Port } } svcCall(EZBNMIF4, &argv[0], &dsa[0]) // outputDesc field is filled by EZBNMIF4 on success if returnCode != 0 || request.header.outputDesc.offset == 0 { return nil, errnoErr(EINVAL) } // Check that EZBNMIF4 returned a nwmConnEntry conn := (*nwmConnEntry)(unsafe.Pointer(&responseBuffer[request.header.outputDesc.offset])) if conn.ident != nwmTCPConnIdentifier { return nil, errnoErr(EINVAL) } // Copy data from the returned data structures into tcpInfo // Stats from nwmConnEntry are specific to that connection. // Stats from nwmTCPStatsEntry are global (to the interface?) // Fields may not be an exact match. Some fields have no equivalent. var tcpinfo TCPInfo tcpinfo.State = uint8(conn.state) tcpinfo.Ca_state = 0 // dummy tcpinfo.Retransmits = uint8(tcpStats.retransSegs) tcpinfo.Probes = uint8(tcpStats.outWinProbes) tcpinfo.Backoff = 0 // dummy tcpinfo.Options = 0 // dummy tcpinfo.Rto = tcpStats.retransTimeouts tcpinfo.Ato = tcpStats.outDelayAcks tcpinfo.Snd_mss = conn.sendMSS tcpinfo.Rcv_mss = conn.sendMSS // dummy tcpinfo.Unacked = 0 // dummy tcpinfo.Sacked = 0 // dummy tcpinfo.Lost = 0 // dummy tcpinfo.Retrans = conn.reXmtCount tcpinfo.Fackets = 0 // dummy tcpinfo.Last_data_sent = uint32(*(*uint64)(unsafe.Pointer(&conn.lastActivity[0]))) tcpinfo.Last_ack_sent = uint32(*(*uint64)(unsafe.Pointer(&conn.outOldestTime[0]))) tcpinfo.Last_data_recv = uint32(*(*uint64)(unsafe.Pointer(&conn.inOldestTime[0]))) tcpinfo.Last_ack_recv = uint32(*(*uint64)(unsafe.Pointer(&conn.inOldestTime[0]))) tcpinfo.Pmtu = conn.sendMSS // dummy, NWMIfRouteMtu is a candidate tcpinfo.Rcv_ssthresh = conn.ssThresh tcpinfo.Rtt = conn.roundTripTime tcpinfo.Rttvar = conn.roundTripVar tcpinfo.Snd_ssthresh = conn.ssThresh // dummy tcpinfo.Snd_cwnd = conn.congestionWnd tcpinfo.Advmss = conn.sendMSS // dummy tcpinfo.Reordering = 0 // dummy tcpinfo.Rcv_rtt = conn.roundTripTime // dummy tcpinfo.Rcv_space = conn.sendMSS // dummy tcpinfo.Total_retrans = conn.reXmtCount svcUnload(&svcNameTable[svc_EZBNMIF4][0], EZBNMIF4) return &tcpinfo, nil } // GetsockoptString returns the string value of the socket option opt for the // socket associated with fd at the given socket level. func GetsockoptString(fd, level, opt int) (string, error) { buf := make([]byte, 256) vallen := _Socklen(len(buf)) err := getsockopt(fd, level, opt, unsafe.Pointer(&buf[0]), &vallen) if err != nil { return "", err } return string(buf[:vallen-1]), nil } func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { var msg Msghdr var rsa RawSockaddrAny msg.Name = (*byte)(unsafe.Pointer(&rsa)) msg.Namelen = SizeofSockaddrAny var iov Iovec if len(p) > 0 { iov.Base = (*byte)(unsafe.Pointer(&p[0])) iov.SetLen(len(p)) } var dummy byte if len(oob) > 0 { // receive at least one normal byte if len(p) == 0 { iov.Base = &dummy iov.SetLen(1) } msg.Control = (*byte)(unsafe.Pointer(&oob[0])) msg.SetControllen(len(oob)) } msg.Iov = &iov msg.Iovlen = 1 if n, err = recvmsg(fd, &msg, flags); err != nil { return } oobn = int(msg.Controllen) recvflags = int(msg.Flags) // source address is only specified if the socket is unconnected if rsa.Addr.Family != AF_UNSPEC { // TODO(neeilan): Remove 0 arg added to get this compiling on z/OS from, err = anyToSockaddr(0, &rsa) } return } func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { _, err = SendmsgN(fd, p, oob, to, flags) return } func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { var ptr unsafe.Pointer var salen _Socklen if to != nil { var err error ptr, salen, err = to.sockaddr() if err != nil { return 0, err } } var msg Msghdr msg.Name = (*byte)(unsafe.Pointer(ptr)) msg.Namelen = int32(salen) var iov Iovec if len(p) > 0 { iov.Base = (*byte)(unsafe.Pointer(&p[0])) iov.SetLen(len(p)) } var dummy byte if len(oob) > 0 { // send at least one normal byte if len(p) == 0 { iov.Base = &dummy iov.SetLen(1) } msg.Control = (*byte)(unsafe.Pointer(&oob[0])) msg.SetControllen(len(oob)) } msg.Iov = &iov msg.Iovlen = 1 if n, err = sendmsg(fd, &msg, flags); err != nil { return 0, err } if len(oob) > 0 && len(p) == 0 { n = 0 } return n, nil } func Opendir(name string) (uintptr, error) { p, err := BytePtrFromString(name) if err != nil { return 0, err } dir, _, e := syscall_syscall(SYS___OPENDIR_A, uintptr(unsafe.Pointer(p)), 0, 0) runtime.KeepAlive(unsafe.Pointer(p)) if e != 0 { err = errnoErr(e) } return dir, err } // clearsyscall.Errno resets the errno value to 0. func clearErrno() func Readdir(dir uintptr) (*Dirent, error) { var ent Dirent var res uintptr // __readdir_r_a returns errno at the end of the directory stream, rather than 0. // Therefore to avoid false positives we clear errno before calling it. // TODO(neeilan): Commented this out to get sys/unix compiling on z/OS. Uncomment and fix. Error: "undefined: clearsyscall" //clearsyscall.Errno() // TODO(mundaym): check pre-emption rules. e, _, _ := syscall_syscall(SYS___READDIR_R_A, dir, uintptr(unsafe.Pointer(&ent)), uintptr(unsafe.Pointer(&res))) var err error if e != 0 { err = errnoErr(Errno(e)) } if res == 0 { return nil, err } return &ent, err } func readdir_r(dirp uintptr, entry *direntLE, result **direntLE) (err error) { r0, _, e1 := syscall_syscall(SYS___READDIR_R_A, dirp, uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result))) if int64(r0) == -1 { err = errnoErr(Errno(e1)) } return } func Closedir(dir uintptr) error { _, _, e := syscall_syscall(SYS_CLOSEDIR, dir, 0, 0) if e != 0 { return errnoErr(e) } return nil } func Seekdir(dir uintptr, pos int) { _, _, _ = syscall_syscall(SYS_SEEKDIR, dir, uintptr(pos), 0) } func Telldir(dir uintptr) (int, error) { p, _, e := syscall_syscall(SYS_TELLDIR, dir, 0, 0) pos := int(p) if pos == -1 { return pos, errnoErr(e) } return pos, nil } // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command. func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error { // struct flock is packed on z/OS. We can't emulate that in Go so // instead we pack it here. var flock [24]byte *(*int16)(unsafe.Pointer(&flock[0])) = lk.Type *(*int16)(unsafe.Pointer(&flock[2])) = lk.Whence *(*int64)(unsafe.Pointer(&flock[4])) = lk.Start *(*int64)(unsafe.Pointer(&flock[12])) = lk.Len *(*int32)(unsafe.Pointer(&flock[20])) = lk.Pid _, _, errno := syscall_syscall(SYS_FCNTL, fd, uintptr(cmd), uintptr(unsafe.Pointer(&flock))) lk.Type = *(*int16)(unsafe.Pointer(&flock[0])) lk.Whence = *(*int16)(unsafe.Pointer(&flock[2])) lk.Start = *(*int64)(unsafe.Pointer(&flock[4])) lk.Len = *(*int64)(unsafe.Pointer(&flock[12])) lk.Pid = *(*int32)(unsafe.Pointer(&flock[20])) if errno == 0 { return nil } return errno } func Flock(fd int, how int) error { var flock_type int16 var fcntl_cmd int switch how { case LOCK_SH | LOCK_NB: flock_type = F_RDLCK fcntl_cmd = F_SETLK case LOCK_EX | LOCK_NB: flock_type = F_WRLCK fcntl_cmd = F_SETLK case LOCK_EX: flock_type = F_WRLCK fcntl_cmd = F_SETLKW case LOCK_UN: flock_type = F_UNLCK fcntl_cmd = F_SETLKW default: } flock := Flock_t{ Type: int16(flock_type), Whence: int16(0), Start: int64(0), Len: int64(0), Pid: int32(Getppid()), } err := FcntlFlock(uintptr(fd), fcntl_cmd, &flock) return err } func Mlock(b []byte) (err error) { _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0) if e1 != 0 { err = errnoErr(e1) } return } func Mlock2(b []byte, flags int) (err error) { _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0) if e1 != 0 { err = errnoErr(e1) } return } func Mlockall(flags int) (err error) { _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0) if e1 != 0 { err = errnoErr(e1) } return } func Munlock(b []byte) (err error) { _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_SWAP, 0, 0) if e1 != 0 { err = errnoErr(e1) } return } func Munlockall() (err error) { _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_SWAP, 0, 0) if e1 != 0 { err = errnoErr(e1) } return } func ClockGettime(clockid int32, ts *Timespec) error { var ticks_per_sec uint32 = 100 //TODO(kenan): value is currently hardcoded; need sysconf() call otherwise var nsec_per_sec int64 = 1000000000 if ts == nil { return EFAULT } if clockid == CLOCK_REALTIME || clockid == CLOCK_MONOTONIC { var nanotime int64 = runtime.Nanotime1() ts.Sec = nanotime / nsec_per_sec ts.Nsec = nanotime % nsec_per_sec } else if clockid == CLOCK_PROCESS_CPUTIME_ID || clockid == CLOCK_THREAD_CPUTIME_ID { var tm Tms _, err := Times(&tm) if err != nil { return EFAULT } ts.Sec = int64(tm.Utime / ticks_per_sec) ts.Nsec = int64(tm.Utime) * nsec_per_sec / int64(ticks_per_sec) } else { return EINVAL } return nil } func Statfs(path string, stat *Statfs_t) (err error) { fd, err := open(path, O_RDONLY, 0) defer Close(fd) if err != nil { return err } return Fstatfs(fd, stat) } var ( Stdin = 0 Stdout = 1 Stderr = 2 ) // Do the interface allocations only once for common // Errno values. var ( errEAGAIN error = syscall.EAGAIN errEINVAL error = syscall.EINVAL errENOENT error = syscall.ENOENT ) var ( signalNameMapOnce sync.Once signalNameMap map[string]syscall.Signal ) // errnoErr returns common boxed Errno values, to prevent // allocations at runtime. func errnoErr(e Errno) error { switch e { case 0: return nil case EAGAIN: return errEAGAIN case EINVAL: return errEINVAL case ENOENT: return errENOENT } return e } // ErrnoName returns the error name for error number e. func ErrnoName(e Errno) string { i := sort.Search(len(errorList), func(i int) bool { return errorList[i].num >= e }) if i < len(errorList) && errorList[i].num == e { return errorList[i].name } return "" } // SignalName returns the signal name for signal number s. func SignalName(s syscall.Signal) string { i := sort.Search(len(signalList), func(i int) bool { return signalList[i].num >= s }) if i < len(signalList) && signalList[i].num == s { return signalList[i].name } return "" } // SignalNum returns the syscall.Signal for signal named s, // or 0 if a signal with such name is not found. // The signal name should start with "SIG". func SignalNum(s string) syscall.Signal { signalNameMapOnce.Do(func() { signalNameMap = make(map[string]syscall.Signal, len(signalList)) for _, signal := range signalList { signalNameMap[signal.name] = signal.num } }) return signalNameMap[s] } // clen returns the index of the first NULL byte in n or len(n) if n contains no NULL byte. func clen(n []byte) int { i := bytes.IndexByte(n, 0) if i == -1 { i = len(n) } return i } // Mmap manager, for use by operating system-specific implementations. type mmapper struct { sync.Mutex active map[*byte][]byte // active mappings; key is last byte in mapping mmap func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, error) munmap func(addr uintptr, length uintptr) error } func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { if length <= 0 { return nil, EINVAL } // Map the requested memory. addr, errno := m.mmap(0, uintptr(length), prot, flags, fd, offset) if errno != nil { return nil, errno } // Slice memory layout var sl = struct { addr uintptr len int cap int }{addr, length, length} // Use unsafe to turn sl into a []byte. b := *(*[]byte)(unsafe.Pointer(&sl)) // Register mapping in m and return it. p := &b[cap(b)-1] m.Lock() defer m.Unlock() m.active[p] = b return b, nil } func (m *mmapper) Munmap(data []byte) (err error) { if len(data) == 0 || len(data) != cap(data) { return EINVAL } // Find the base of the mapping. p := &data[cap(data)-1] m.Lock() defer m.Unlock() b := m.active[p] if b == nil || &b[0] != &data[0] { return EINVAL } // Unmap the memory and update m. if errno := m.munmap(uintptr(unsafe.Pointer(&b[0])), uintptr(len(b))); errno != nil { return errno } delete(m.active, p) return nil } func Read(fd int, p []byte) (n int, err error) { n, err = read(fd, p) if raceenabled { if n > 0 { raceWriteRange(unsafe.Pointer(&p[0]), n) } if err == nil { raceAcquire(unsafe.Pointer(&ioSync)) } } return } func Write(fd int, p []byte) (n int, err error) { if raceenabled { raceReleaseMerge(unsafe.Pointer(&ioSync)) } n, err = write(fd, p) if raceenabled && n > 0 { raceReadRange(unsafe.Pointer(&p[0]), n) } return } // For testing: clients can set this flag to force // creation of IPv6 sockets to return EAFNOSUPPORT. var SocketDisableIPv6 bool // Sockaddr represents a socket address. type Sockaddr interface { sockaddr() (ptr unsafe.Pointer, len _Socklen, err error) // lowercase; only we can define Sockaddrs } // SockaddrInet4 implements the Sockaddr interface for AF_INET type sockets. type SockaddrInet4 struct { Port int Addr [4]byte raw RawSockaddrInet4 } // SockaddrInet6 implements the Sockaddr interface for AF_INET6 type sockets. type SockaddrInet6 struct { Port int ZoneId uint32 Addr [16]byte raw RawSockaddrInet6 } // SockaddrUnix implements the Sockaddr interface for AF_UNIX type sockets. type SockaddrUnix struct { Name string raw RawSockaddrUnix } func Bind(fd int, sa Sockaddr) (err error) { ptr, n, err := sa.sockaddr() if err != nil { return err } return bind(fd, ptr, n) } func Connect(fd int, sa Sockaddr) (err error) { ptr, n, err := sa.sockaddr() if err != nil { return err } return connect(fd, ptr, n) } func Getpeername(fd int) (sa Sockaddr, err error) { var rsa RawSockaddrAny var len _Socklen = SizeofSockaddrAny if err = getpeername(fd, &rsa, &len); err != nil { return } return anyToSockaddr(fd, &rsa) } func GetsockoptByte(fd, level, opt int) (value byte, err error) { var n byte vallen := _Socklen(1) err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) return n, err } func GetsockoptInt(fd, level, opt int) (value int, err error) { var n int32 vallen := _Socklen(4) err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) return int(n), err } func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) { vallen := _Socklen(4) err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen) return value, err } func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) { var value IPMreq vallen := _Socklen(SizeofIPMreq) err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) return &value, err } func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) { var value IPv6Mreq vallen := _Socklen(SizeofIPv6Mreq) err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) return &value, err } func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) { var value IPv6MTUInfo vallen := _Socklen(SizeofIPv6MTUInfo) err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) return &value, err } func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) { var value ICMPv6Filter vallen := _Socklen(SizeofICMPv6Filter) err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) return &value, err } func GetsockoptLinger(fd, level, opt int) (*Linger, error) { var linger Linger vallen := _Socklen(SizeofLinger) err := getsockopt(fd, level, opt, unsafe.Pointer(&linger), &vallen) return &linger, err } func GetsockoptTimeval(fd, level, opt int) (*Timeval, error) { var tv Timeval vallen := _Socklen(unsafe.Sizeof(tv)) err := getsockopt(fd, level, opt, unsafe.Pointer(&tv), &vallen) return &tv, err } func GetsockoptUint64(fd, level, opt int) (value uint64, err error) { var n uint64 vallen := _Socklen(8) err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) return n, err } func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, err error) { var rsa RawSockaddrAny var len _Socklen = SizeofSockaddrAny if n, err = recvfrom(fd, p, flags, &rsa, &len); err != nil { return } if rsa.Addr.Family != AF_UNSPEC { from, err = anyToSockaddr(fd, &rsa) } return } func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) { ptr, n, err := to.sockaddr() if err != nil { return err } return sendto(fd, p, flags, ptr, n) } func SetsockoptByte(fd, level, opt int, value byte) (err error) { return setsockopt(fd, level, opt, unsafe.Pointer(&value), 1) } func SetsockoptInt(fd, level, opt int, value int) (err error) { var n = int32(value) return setsockopt(fd, level, opt, unsafe.Pointer(&n), 4) } func SetsockoptInet4Addr(fd, level, opt int, value [4]byte) (err error) { return setsockopt(fd, level, opt, unsafe.Pointer(&value[0]), 4) } func SetsockoptIPMreq(fd, level, opt int, mreq *IPMreq) (err error) { return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPMreq) } func SetsockoptIPv6Mreq(fd, level, opt int, mreq *IPv6Mreq) (err error) { return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPv6Mreq) } func SetsockoptICMPv6Filter(fd, level, opt int, filter *ICMPv6Filter) error { return setsockopt(fd, level, opt, unsafe.Pointer(filter), SizeofICMPv6Filter) } func SetsockoptLinger(fd, level, opt int, l *Linger) (err error) { return setsockopt(fd, level, opt, unsafe.Pointer(l), SizeofLinger) } func SetsockoptString(fd, level, opt int, s string) (err error) { var p unsafe.Pointer if len(s) > 0 { p = unsafe.Pointer(&[]byte(s)[0]) } return setsockopt(fd, level, opt, p, uintptr(len(s))) } func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (err error) { return setsockopt(fd, level, opt, unsafe.Pointer(tv), unsafe.Sizeof(*tv)) } func SetsockoptUint64(fd, level, opt int, value uint64) (err error) { return setsockopt(fd, level, opt, unsafe.Pointer(&value), 8) } func Socket(domain, typ, proto int) (fd int, err error) { if domain == AF_INET6 && SocketDisableIPv6 { return -1, EAFNOSUPPORT } fd, err = socket(domain, typ, proto) return } func Socketpair(domain, typ, proto int) (fd [2]int, err error) { var fdx [2]int32 err = socketpair(domain, typ, proto, &fdx) if err == nil { fd[0] = int(fdx[0]) fd[1] = int(fdx[1]) } return } var ioSync int64 func CloseOnExec(fd int) { fcntl(fd, F_SETFD, FD_CLOEXEC) } func SetNonblock(fd int, nonblocking bool) (err error) { flag, err := fcntl(fd, F_GETFL, 0) if err != nil { return err } if nonblocking { flag |= O_NONBLOCK } else { flag &= ^O_NONBLOCK } _, err = fcntl(fd, F_SETFL, flag) return err } // Exec calls execve(2), which replaces the calling executable in the process // tree. argv0 should be the full path to an executable ("/bin/ls") and the // executable name should also be the first argument in argv (["ls", "-l"]). // envv are the environment variables that should be passed to the new // process (["USER=go", "PWD=/tmp"]). func Exec(argv0 string, argv []string, envv []string) error { return syscall.Exec(argv0, argv, envv) } func Mount(source string, target string, fstype string, flags uintptr, data string) (err error) { if needspace := 8 - len(fstype); needspace <= 0 { fstype = fstype[:8] } else { fstype += " "[:needspace] } return mount_LE(target, source, fstype, uint32(flags), int32(len(data)), data) } func Unmount(name string, mtm int) (err error) { // mountpoint is always a full path and starts with a '/' // check if input string is not a mountpoint but a filesystem name if name[0] != '/' { return unmount(name, mtm) } // treat name as mountpoint b2s := func(arr []byte) string { nulli := bytes.IndexByte(arr, 0) if nulli == -1 { return string(arr) } else { return string(arr[:nulli]) } } var buffer struct { header W_Mnth fsinfo [64]W_Mntent } fsCount, err := W_Getmntent_A((*byte)(unsafe.Pointer(&buffer)), int(unsafe.Sizeof(buffer))) if err != nil { return err } if fsCount == 0 { return EINVAL } for i := 0; i < fsCount; i++ { if b2s(buffer.fsinfo[i].Mountpoint[:]) == name { err = unmount(b2s(buffer.fsinfo[i].Fsname[:]), mtm) break } } return err } func fdToPath(dirfd int) (path string, err error) { var buffer [1024]byte // w_ctrl() ret := runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS_W_IOCTL<<4, []uintptr{uintptr(dirfd), 17, 1024, uintptr(unsafe.Pointer(&buffer[0]))}) if ret == 0 { zb := bytes.IndexByte(buffer[:], 0) if zb == -1 { zb = len(buffer) } // __e2a_l() runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS___E2A_L<<4, []uintptr{uintptr(unsafe.Pointer(&buffer[0])), uintptr(zb)}) return string(buffer[:zb]), nil } // __errno() errno := int(*(*int32)(unsafe.Pointer(runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS___ERRNO<<4, []uintptr{})))) // __errno2() errno2 := int(runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS___ERRNO2<<4, []uintptr{})) // strerror_r() ret = runtime.CallLeFuncByPtr(runtime.XplinkLibvec+SYS_STRERROR_R<<4, []uintptr{uintptr(errno), uintptr(unsafe.Pointer(&buffer[0])), 1024}) if ret == 0 { zb := bytes.IndexByte(buffer[:], 0) if zb == -1 { zb = len(buffer) } return "", fmt.Errorf("%s (errno2=0x%x)", buffer[:zb], errno2) } else { return "", fmt.Errorf("fdToPath errno %d (errno2=0x%x)", errno, errno2) } } func direntLeToDirentUnix(dirent *direntLE, dir uintptr, path string) (Dirent, error) { var d Dirent d.Ino = uint64(dirent.Ino) offset, err := Telldir(dir) if err != nil { return d, err } d.Off = int64(offset) s := string(bytes.Split(dirent.Name[:], []byte{0})[0]) copy(d.Name[:], s) d.Reclen = uint16(24 + len(d.NameString())) var st Stat_t path = path + "/" + s err = Lstat(path, &st) if err != nil { return d, err } d.Type = uint8(st.Mode >> 24) return d, err } func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { // Simulation of Getdirentries port from the Darwin implementation. // COMMENTS FROM DARWIN: // It's not the full required semantics, but should handle the case // of calling Getdirentries or ReadDirent repeatedly. // It won't handle assigning the results of lseek to *basep, or handle // the directory being edited underfoot. skip, err := Seek(fd, 0, 1 /* SEEK_CUR */) if err != nil { return 0, err } // Get path from fd to avoid unavailable call (fdopendir) path, err := fdToPath(fd) if err != nil { return 0, err } d, err := Opendir(path) if err != nil { return 0, err } defer Closedir(d) var cnt int64 for { var entryLE direntLE var entrypLE *direntLE e := readdir_r(d, &entryLE, &entrypLE) if e != nil { return n, e } if entrypLE == nil { break } if skip > 0 { skip-- cnt++ continue } // Dirent on zos has a different structure entry, e := direntLeToDirentUnix(&entryLE, d, path) if e != nil { return n, e } reclen := int(entry.Reclen) if reclen > len(buf) { // Not enough room. Return for now. // The counter will let us know where we should start up again. // Note: this strategy for suspending in the middle and // restarting is O(n^2) in the length of the directory. Oh well. break } // Copy entry into return buffer. s := unsafe.Slice((*byte)(unsafe.Pointer(&entry)), reclen) copy(buf, s) buf = buf[reclen:] n += reclen cnt++ } // Set the seek offset of the input fd to record // how many files we've already returned. _, err = Seek(fd, cnt, 0 /* SEEK_SET */) if err != nil { return n, err } return n, nil } func ReadDirent(fd int, buf []byte) (n int, err error) { var base = (*uintptr)(unsafe.Pointer(new(uint64))) return Getdirentries(fd, buf, base) } func direntIno(buf []byte) (uint64, bool) { return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) } func direntReclen(buf []byte) (uint64, bool) { return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) } func direntNamlen(buf []byte) (uint64, bool) { reclen, ok := direntReclen(buf) if !ok { return 0, false } return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true }