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unix: implement Vmsplice, add SPLICE_F_* constants

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Fixes golang/go#19125

Change-Id: I822b6f260f980178da29a552c6170cb261c8e254
Reviewed-on: https://go-review.googlesource.com/37152
Run-TryBot: Matt Layher <mdlayher@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Matt Layher
2017-02-16 16:06:26 -05:00
committed by Ian Lance Taylor
parent e24f485414
commit 075e574b89
14 changed files with 69 additions and 2 deletions
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3
unix/mkerrors.sh
View File

@@ -345,6 +345,7 @@ ccflags="$@"
$2 ~ /^CLOCK_/ ||
$2 ~ /^CAN_/ ||
$2 ~ /^ALG_/ ||
$2 ~ /^SPLICE_/ ||
$2 !~ "WMESGLEN" &&
$2 ~ /^W[A-Z0-9]+$/ {printf("\t%s = C.%s\n", $2, $2)}
$2 ~ /^__WCOREFLAG$/ {next}
@@ -460,7 +461,7 @@ main(void)
printf("\t%d: \"%s\",\n", e, buf);
}
printf("}\n\n");
printf("\n\n// Signal table\n");
printf("var signals = [...]string {\n");
qsort(signals, nelem(signals), sizeof signals[0], intcmp);

20
unix/syscall_linux.go
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@@ -1118,6 +1118,25 @@ func Munmap(b []byte) (err error) {
//sys Mlockall(flags int) (err error)
//sys Munlockall() (err error)
// Vmsplice splices user pages from a slice of Iovecs into a pipe specified by fd,
// using the specified flags.
func Vmsplice(fd int, iovs []Iovec, flags int) (int, error) {
n, _, errno := Syscall6(
SYS_VMSPLICE,
uintptr(fd),
uintptr(unsafe.Pointer(&iovs[0])),
uintptr(len(iovs)),
uintptr(flags),
0,
0,
)
if errno != 0 {
return 0, syscall.Errno(errno)
}
return int(n), nil
}
/*
* Unimplemented
*/
@@ -1245,7 +1264,6 @@ func Munmap(b []byte) (err error) {
// Utimensat
// Vfork
// Vhangup
// Vmsplice
// Vserver
// Waitid
// _Sysctl

4
unix/zerrors_linux_386.go
View File

@@ -1305,6 +1305,10 @@ const (
SO_TIMESTAMPING = 0x25
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x3
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_amd64.go
View File

@@ -1306,6 +1306,10 @@ const (
SO_TIMESTAMPING = 0x25
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x3
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_arm.go
View File

@@ -1229,6 +1229,10 @@ const (
SO_TIMESTAMPING = 0x25
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x3
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_arm64.go
View File

@@ -1361,6 +1361,10 @@ const (
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x3
SO_WIFI_STATUS = 0x29
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_mips.go
View File

@@ -1280,6 +1280,10 @@ const (
SO_TIMESTAMPING = 0x25
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x1008
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_mips64.go
View File

@@ -1376,6 +1376,10 @@ const (
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x1008
SO_WIFI_STATUS = 0x29
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_mips64le.go
View File

@@ -1376,6 +1376,10 @@ const (
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x1008
SO_WIFI_STATUS = 0x29
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_mipsle.go
View File

@@ -1451,6 +1451,10 @@ const (
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x1008
SO_WIFI_STATUS = 0x29
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_ppc64.go
View File

@@ -1429,6 +1429,10 @@ const (
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x3
SO_WIFI_STATUS = 0x29
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_ppc64le.go
View File

@@ -1428,6 +1428,10 @@ const (
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x3
SO_WIFI_STATUS = 0x29
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_s390x.go
View File

@@ -1483,6 +1483,10 @@ const (
SO_TIMESTAMPNS = 0x23
SO_TYPE = 0x3
SO_WIFI_STATUS = 0x29
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000

4
unix/zerrors_linux_sparc64.go
View File

@@ -1524,6 +1524,10 @@ const (
SO_TIMESTAMPNS = 0x21
SO_TYPE = 0x1008
SO_WIFI_STATUS = 0x25
SPLICE_F_GIFT = 0x8
SPLICE_F_MORE = 0x4
SPLICE_F_MOVE = 0x1
SPLICE_F_NONBLOCK = 0x2
S_BLKSIZE = 0x200
S_IEXEC = 0x40
S_IFBLK = 0x6000