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sys/unix/types_freebsd.go
Yuval Pavel Zholkover 5535b4e6bf unix: FreeBSD 12 ino64 support 
Background:
The 64-bit inode project was merged into the upcoming FreeBSD 12 release.
It changes the ABI for structs holding inodes: stat, statfs, dirent.
New system call numbers were introduced which accept the new struct layouts,
the old ones were marked as COMPAT11.
Their equivalent libc wrappers are using ELF symbol versioning.
The new wrappers have moved from @FBSD_1.0 to @FBSD_1.5.

Backward and forward compatability is achieved by always using the new struct
layouts while converting the old struct instance to the new layout on old kernels.
https://svnweb.freebsd.org/base?view=revision&revision=318736
https://svnweb.freebsd.org/base?view=revision&revision=320278

The same approach is used for Go:
The new Stat_t, Statfs_t and Dirent types hold 64-bit inodes and additional ABI
changes, they are generated from their C definitions in FreeBSD-12 using cgo -godefs.
Each type has an unexported *_freebsd11 counterpart generated the same way.
Previous directly exposed syscalls like Fstat have now a wrapper in place calling
either fstat or fstat_freebsd12 zsyscall wrapper based on the kern.osreldate.
If an old syscall needs to be used, then the returned *_freebsd11 result is converted
to the new layout before returning from the wrapper.

Introduce supportsABI() call to check the kern.osreldate sysctl for the ABI version.
Drop the old struct stat8 definition in favour of the <sys/stat.h> version.
Run the mktypes part of GOOS=freebsd GOARCH={386,amd64,arm} ./mkall.sh
on FreeBSD-12.0-ALPHA6 (r338675), updating all types except Kevent.

Expose Mknodat, both COMPAT11 version (currently missing) and the FreeBSD 12 one.
Some COMPAT11 syscalls have no direct FreeBSD 12 counterpart, in those cases
an *at(AT_FDCWD, ...) is used instead.

Updates golang/go#22448

Change-Id: I87940b88ae358db88103cdcd06f9cafbf4694cfc
Reviewed-on: https://go-review.googlesource.com/c/136816
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2018-10-22 06:42:59 +00:00

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// Copyright 2009 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.
// +build ignore
/*
Input to cgo -godefs. See README.md
*/
// +godefs map struct_in_addr [4]byte /* in_addr */
// +godefs map struct_in6_addr [16]byte /* in6_addr */
package unix
/*
#define _WANT_FREEBSD11_STAT 1
#define _WANT_FREEBSD11_STATFS 1
#define _WANT_FREEBSD11_DIRENT 1
#define _WANT_FREEBSD11_KEVENT 1
#include <dirent.h>
#include <fcntl.h>
#include <poll.h>
#include <signal.h>
#include <termios.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/capability.h>
#include <sys/event.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/param.h>
#include <sys/ptrace.h>
#include <sys/resource.h>
#include <sys/select.h>
#include <sys/signal.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/un.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/icmp6.h>
#include <netinet/tcp.h>
enum {
sizeofPtr = sizeof(void*),
};
union sockaddr_all {
struct sockaddr s1; // this one gets used for fields
struct sockaddr_in s2; // these pad it out
struct sockaddr_in6 s3;
struct sockaddr_un s4;
struct sockaddr_dl s5;
};
struct sockaddr_any {
struct sockaddr addr;
char pad[sizeof(union sockaddr_all) - sizeof(struct sockaddr)];
};
// This structure is a duplicate of if_data on FreeBSD 8-STABLE.
// See /usr/include/net/if.h.
struct if_data8 {
u_char ifi_type;
u_char ifi_physical;
u_char ifi_addrlen;
u_char ifi_hdrlen;
u_char ifi_link_state;
u_char ifi_spare_char1;
u_char ifi_spare_char2;
u_char ifi_datalen;
u_long ifi_mtu;
u_long ifi_metric;
u_long ifi_baudrate;
u_long ifi_ipackets;
u_long ifi_ierrors;
u_long ifi_opackets;
u_long ifi_oerrors;
u_long ifi_collisions;
u_long ifi_ibytes;
u_long ifi_obytes;
u_long ifi_imcasts;
u_long ifi_omcasts;
u_long ifi_iqdrops;
u_long ifi_noproto;
u_long ifi_hwassist;
// FIXME: these are now unions, so maybe need to change definitions?
#undef ifi_epoch
time_t ifi_epoch;
#undef ifi_lastchange
struct timeval ifi_lastchange;
};
// This structure is a duplicate of if_msghdr on FreeBSD 8-STABLE.
// See /usr/include/net/if.h.
struct if_msghdr8 {
u_short ifm_msglen;
u_char ifm_version;
u_char ifm_type;
int ifm_addrs;
int ifm_flags;
u_short ifm_index;
struct if_data8 ifm_data;
};
*/
import "C"
// Machine characteristics
const (
SizeofPtr = C.sizeofPtr
SizeofShort = C.sizeof_short
SizeofInt = C.sizeof_int
SizeofLong = C.sizeof_long
SizeofLongLong = C.sizeof_longlong
)
// Basic types
type (
_C_short C.short
_C_int C.int
_C_long C.long
_C_long_long C.longlong
)
// Time
type Timespec C.struct_timespec
type Timeval C.struct_timeval
// Processes
type Rusage C.struct_rusage
type Rlimit C.struct_rlimit
type _Gid_t C.gid_t
// Files
const (
_statfsVersion = C.STATFS_VERSION
_dirblksiz = C.DIRBLKSIZ
)
type Stat_t C.struct_stat
type stat_freebsd11_t C.struct_freebsd11_stat
type Statfs_t C.struct_statfs
type statfs_freebsd11_t C.struct_freebsd11_statfs
type Flock_t C.struct_flock
type Dirent C.struct_dirent
type dirent_freebsd11 C.struct_freebsd11_dirent
type Fsid C.struct_fsid
// File system limits
const (
PathMax = C.PATH_MAX
)
// Advice to Fadvise
const (
FADV_NORMAL = C.POSIX_FADV_NORMAL
FADV_RANDOM = C.POSIX_FADV_RANDOM
FADV_SEQUENTIAL = C.POSIX_FADV_SEQUENTIAL
FADV_WILLNEED = C.POSIX_FADV_WILLNEED
FADV_DONTNEED = C.POSIX_FADV_DONTNEED
FADV_NOREUSE = C.POSIX_FADV_NOREUSE
)
// Sockets
type RawSockaddrInet4 C.struct_sockaddr_in
type RawSockaddrInet6 C.struct_sockaddr_in6
type RawSockaddrUnix C.struct_sockaddr_un
type RawSockaddrDatalink C.struct_sockaddr_dl
type RawSockaddr C.struct_sockaddr
type RawSockaddrAny C.struct_sockaddr_any
type _Socklen C.socklen_t
type Linger C.struct_linger
type Iovec C.struct_iovec
type IPMreq C.struct_ip_mreq
type IPMreqn C.struct_ip_mreqn
type IPv6Mreq C.struct_ipv6_mreq
type Msghdr C.struct_msghdr
type Cmsghdr C.struct_cmsghdr
type Inet6Pktinfo C.struct_in6_pktinfo
type IPv6MTUInfo C.struct_ip6_mtuinfo
type ICMPv6Filter C.struct_icmp6_filter
const (
SizeofSockaddrInet4 = C.sizeof_struct_sockaddr_in
SizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
SizeofSockaddrAny = C.sizeof_struct_sockaddr_any
SizeofSockaddrUnix = C.sizeof_struct_sockaddr_un
SizeofSockaddrDatalink = C.sizeof_struct_sockaddr_dl
SizeofLinger = C.sizeof_struct_linger
SizeofIPMreq = C.sizeof_struct_ip_mreq
SizeofIPMreqn = C.sizeof_struct_ip_mreqn
SizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq
SizeofMsghdr = C.sizeof_struct_msghdr
SizeofCmsghdr = C.sizeof_struct_cmsghdr
SizeofInet6Pktinfo = C.sizeof_struct_in6_pktinfo
SizeofIPv6MTUInfo = C.sizeof_struct_ip6_mtuinfo
SizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
)
// Ptrace requests
const (
PTRACE_TRACEME = C.PT_TRACE_ME
PTRACE_CONT = C.PT_CONTINUE
PTRACE_KILL = C.PT_KILL
)
// Events (kqueue, kevent)
type Kevent_t C.struct_kevent_freebsd11
// Select
type FdSet C.fd_set
// Routing and interface messages
const (
sizeofIfMsghdr = C.sizeof_struct_if_msghdr
SizeofIfMsghdr = C.sizeof_struct_if_msghdr8
sizeofIfData = C.sizeof_struct_if_data
SizeofIfData = C.sizeof_struct_if_data8
SizeofIfaMsghdr = C.sizeof_struct_ifa_msghdr
SizeofIfmaMsghdr = C.sizeof_struct_ifma_msghdr
SizeofIfAnnounceMsghdr = C.sizeof_struct_if_announcemsghdr
SizeofRtMsghdr = C.sizeof_struct_rt_msghdr
SizeofRtMetrics = C.sizeof_struct_rt_metrics
)
type ifMsghdr C.struct_if_msghdr
type IfMsghdr C.struct_if_msghdr8
type ifData C.struct_if_data
type IfData C.struct_if_data8
type IfaMsghdr C.struct_ifa_msghdr
type IfmaMsghdr C.struct_ifma_msghdr
type IfAnnounceMsghdr C.struct_if_announcemsghdr
type RtMsghdr C.struct_rt_msghdr
type RtMetrics C.struct_rt_metrics
// Berkeley packet filter
const (
SizeofBpfVersion = C.sizeof_struct_bpf_version
SizeofBpfStat = C.sizeof_struct_bpf_stat
SizeofBpfZbuf = C.sizeof_struct_bpf_zbuf
SizeofBpfProgram = C.sizeof_struct_bpf_program
SizeofBpfInsn = C.sizeof_struct_bpf_insn
SizeofBpfHdr = C.sizeof_struct_bpf_hdr
SizeofBpfZbufHeader = C.sizeof_struct_bpf_zbuf_header
)
type BpfVersion C.struct_bpf_version
type BpfStat C.struct_bpf_stat
type BpfZbuf C.struct_bpf_zbuf
type BpfProgram C.struct_bpf_program
type BpfInsn C.struct_bpf_insn
type BpfHdr C.struct_bpf_hdr
type BpfZbufHeader C.struct_bpf_zbuf_header
// Terminal handling
type Termios C.struct_termios
type Winsize C.struct_winsize
// fchmodat-like syscalls.
const (
AT_FDCWD = C.AT_FDCWD
AT_REMOVEDIR = C.AT_REMOVEDIR
AT_SYMLINK_FOLLOW = C.AT_SYMLINK_FOLLOW
AT_SYMLINK_NOFOLLOW = C.AT_SYMLINK_NOFOLLOW
)
// poll
type PollFd C.struct_pollfd
const (
POLLERR = C.POLLERR
POLLHUP = C.POLLHUP
POLLIN = C.POLLIN
POLLINIGNEOF = C.POLLINIGNEOF
POLLNVAL = C.POLLNVAL
POLLOUT = C.POLLOUT
POLLPRI = C.POLLPRI
POLLRDBAND = C.POLLRDBAND
POLLRDNORM = C.POLLRDNORM
POLLWRBAND = C.POLLWRBAND
POLLWRNORM = C.POLLWRNORM
)
// Capabilities
type CapRights C.struct_cap_rights
// Uname
type Utsname C.struct_utsname
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