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unix: FreeBSD 12 ino64 support

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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>
This commit is contained in:
Yuval Pavel Zholkover
2018-10-22 06:42:59 +00:00
committed by Tobias Klauser
parent eda9bb28ed
commit 5535b4e6bf
8 changed files with 1086 additions and 400 deletions
Download Patch File Download Diff File Expand all files Collapse all files
unix/zsyscall_freebsd_386.go
+91 -11
View File
@@ -912,7 +912,7 @@ func Fpathconf(fd int, name int) (val int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fstat(fd int, stat *Stat_t) (err error) {
func fstat(fd int, stat *stat_freebsd11_t) (err error) {
_, _, e1 := Syscall(SYS_FSTAT, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
if e1 != 0 {
err = errnoErr(e1)
@@ -922,7 +922,17 @@ func Fstat(fd int, stat *Stat_t) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
func fstat_freebsd12(fd int, stat *Stat_t) (err error) {
_, _, e1 := Syscall(SYS_FSTAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func fstatat(fd int, path string, stat *stat_freebsd11_t, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
@@ -937,7 +947,22 @@ func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fstatfs(fd int, stat *Statfs_t) (err error) {
func fstatat_freebsd12(fd int, path string, stat *Stat_t, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_FSTATAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func fstatfs(fd int, stat *statfs_freebsd11_t) (err error) {
_, _, e1 := Syscall(SYS_FSTATFS, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
if e1 != 0 {
err = errnoErr(e1)
@@ -947,6 +972,16 @@ func Fstatfs(fd int, stat *Statfs_t) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func fstatfs_freebsd12(fd int, stat *Statfs_t) (err error) {
_, _, e1 := Syscall(SYS_FSTATFS_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fsync(fd int) (err error) {
_, _, e1 := Syscall(SYS_FSYNC, uintptr(fd), 0, 0)
if e1 != 0 {
@@ -967,14 +1002,14 @@ func Ftruncate(fd int, length int64) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Getdents(fd int, buf []byte) (n int, err error) {
func getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
var _p0 unsafe.Pointer
if len(buf) > 0 {
_p0 = unsafe.Pointer(&buf[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := Syscall(SYS_GETDENTS, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
r0, _, e1 := Syscall6(SYS_GETDIRENTRIES, uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
@@ -984,14 +1019,14 @@ func Getdents(fd int, buf []byte) (n int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
func getdirentries_freebsd12(fd int, buf []byte, basep *uintptr) (n int, err error) {
var _p0 unsafe.Pointer
if len(buf) > 0 {
_p0 = unsafe.Pointer(&buf[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := Syscall6(SYS_GETDIRENTRIES, uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
r0, _, e1 := Syscall6(SYS_GETDIRENTRIES_FREEBSD12, uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
@@ -1222,7 +1257,7 @@ func Listen(s int, backlog int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Lstat(path string, stat *Stat_t) (err error) {
func lstat(path string, stat *stat_freebsd11_t) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
@@ -1282,7 +1317,7 @@ func Mkfifo(path string, mode uint32) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Mknod(path string, mode uint32, dev int) (err error) {
func mknod(path string, mode uint32, dev int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
@@ -1297,6 +1332,36 @@ func Mknod(path string, mode uint32, dev int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func mknodat(fd int, path string, mode uint32, dev int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_MKNODAT, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev), 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func mknodat_freebsd12(fd int, path string, mode uint32, dev uint64) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall6(SYS_MKNODAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev), 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Nanosleep(time *Timespec, leftover *Timespec) (err error) {
_, _, e1 := Syscall(SYS_NANOSLEEP, uintptr(unsafe.Pointer(time)), uintptr(unsafe.Pointer(leftover)), 0)
if e1 != 0 {
@@ -1687,7 +1752,7 @@ func Setuid(uid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Stat(path string, stat *Stat_t) (err error) {
func stat(path string, stat *stat_freebsd11_t) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
@@ -1702,7 +1767,7 @@ func Stat(path string, stat *Stat_t) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Statfs(path string, stat *Statfs_t) (err error) {
func statfs(path string, stat *statfs_freebsd11_t) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
@@ -1717,6 +1782,21 @@ func Statfs(path string, stat *Statfs_t) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func statfs_freebsd12(path string, stat *Statfs_t) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall(SYS_STATFS_FREEBSD12, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Symlink(path string, link string) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)