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unix: add IoctlFile{Clone,CloneRange,DedupeRange} on linux

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Add wrappers for the FICLONE, FICLONERANGE and FIDEDUPERANGE ioctl
operations on linux. See the ioctl_ficlone(2), ioctl_ficlonerange(2) and
ioctl_fideduperange(2) man pages for details.

Change-Id: If3bad98facc362d4f7524e8d7a128815e9e2f204
Reviewed-on: https://go-review.googlesource.com/c/sys/+/256000
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2020-09-21 10:55:12 +02:00
committed by Tobias Klauser
parent e10f822d58
commit aee5d888a8
18 changed files with 72 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
unix/linux/types.go
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@@ -465,6 +465,10 @@ type Fsid C.fsid_t
type Flock_t C.struct_flock
type FileCloneRange C.struct_file_clone_range
type FileDedupeRange C.struct_file_dedupe_range
// Filesystem Encryption
type FscryptPolicy C.struct_fscrypt_policy

1
unix/mkerrors.sh
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@@ -517,6 +517,7 @@ ccflags="$@"
$2 ~ /^CP_/ ||
$2 ~ /^CPUSTATES$/ ||
$2 ~ /^ALG_/ ||
$2 ~ /^FI(CLONE|DEDUPERANGE)/ ||
$2 ~ /^FS_(POLICY_FLAGS|KEY_DESC|ENCRYPTION_MODE|[A-Z0-9_]+_KEY_SIZE)/ ||
$2 ~ /^FS_IOC_.*(ENCRYPTION|VERITY|[GS]ETFLAGS)/ ||
$2 ~ /^FS_VERITY_/ ||

25
unix/syscall_linux.go
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@@ -112,6 +112,31 @@ func IoctlGetRTCWkAlrm(fd int) (*RTCWkAlrm, error) {
return &value, err
}
// IoctlFileClone performs an FICLONERANGE ioctl operation to clone the range of
// data conveyed in value to the file associated with the file descriptor
// destFd. See the ioctl_ficlonerange(2) man page for details.
func IoctlFileCloneRange(destFd int, value *FileCloneRange) error {
err := ioctl(destFd, FICLONERANGE, uintptr(unsafe.Pointer(value)))
runtime.KeepAlive(value)
return err
}
// IoctlFileClone performs an FICLONE ioctl operation to clone the entire file
// associated with the file description srcFd to the file associated with the
// file descriptor destFd. See the ioctl_ficlone(2) man page for details.
func IoctlFileClone(destFd, srcFd int) error {
return ioctl(destFd, FICLONE, uintptr(srcFd))
}
// IoctlFileClone performs an FIDEDUPERANGE ioctl operation to share the range of
// data conveyed in value with the file associated with the file descriptor
// destFd. See the ioctl_fideduperange(2) man page for details.
func IoctlFileDedupeRange(destFd int, value *FileDedupeRange) error {
err := ioctl(destFd, FIDEDUPERANGE, uintptr(unsafe.Pointer(value)))
runtime.KeepAlive(value)
return err
}
//sys Linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error)
func Link(oldpath string, newpath string) (err error) {

1
unix/zerrors_linux.go
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@@ -686,6 +686,7 @@ const (
FD_CLOEXEC = 0x1
FD_SETSIZE = 0x400
FF0 = 0x0
FIDEDUPERANGE = 0xc0189436
FSCRYPT_KEY_DESCRIPTOR_SIZE = 0x8
FSCRYPT_KEY_DESC_PREFIX = "fscrypt:"
FSCRYPT_KEY_DESC_PREFIX_SIZE = 0x8

2
unix/zerrors_linux_386.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x40049409
FICLONERANGE = 0x4020940d
FLUSHO = 0x1000
FP_XSTATE_MAGIC2 = 0x46505845
FS_IOC_ENABLE_VERITY = 0x40806685

2
unix/zerrors_linux_amd64.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x40049409
FICLONERANGE = 0x4020940d
FLUSHO = 0x1000
FP_XSTATE_MAGIC2 = 0x46505845
FS_IOC_ENABLE_VERITY = 0x40806685

2
unix/zerrors_linux_arm.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x40049409
FICLONERANGE = 0x4020940d
FLUSHO = 0x1000
FS_IOC_ENABLE_VERITY = 0x40806685
FS_IOC_GETFLAGS = 0x80046601

2
unix/zerrors_linux_arm64.go
View File

@@ -73,6 +73,8 @@ const (
EXTRA_MAGIC = 0x45585401
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x40049409
FICLONERANGE = 0x4020940d
FLUSHO = 0x1000
FPSIMD_MAGIC = 0x46508001
FS_IOC_ENABLE_VERITY = 0x40806685

2
unix/zerrors_linux_mips.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x80049409
FICLONERANGE = 0x8020940d
FLUSHO = 0x2000
FS_IOC_ENABLE_VERITY = 0x80806685
FS_IOC_GETFLAGS = 0x40046601

2
unix/zerrors_linux_mips64.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x80049409
FICLONERANGE = 0x8020940d
FLUSHO = 0x2000
FS_IOC_ENABLE_VERITY = 0x80806685
FS_IOC_GETFLAGS = 0x40086601

2
unix/zerrors_linux_mips64le.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x80049409
FICLONERANGE = 0x8020940d
FLUSHO = 0x2000
FS_IOC_ENABLE_VERITY = 0x80806685
FS_IOC_GETFLAGS = 0x40086601

2
unix/zerrors_linux_mipsle.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x80049409
FICLONERANGE = 0x8020940d
FLUSHO = 0x2000
FS_IOC_ENABLE_VERITY = 0x80806685
FS_IOC_GETFLAGS = 0x40046601

2
unix/zerrors_linux_ppc64.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000000
FF1 = 0x4000
FFDLY = 0x4000
FICLONE = 0x80049409
FICLONERANGE = 0x8020940d
FLUSHO = 0x800000
FS_IOC_ENABLE_VERITY = 0x80806685
FS_IOC_GETFLAGS = 0x40086601

2
unix/zerrors_linux_ppc64le.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000000
FF1 = 0x4000
FFDLY = 0x4000
FICLONE = 0x80049409
FICLONERANGE = 0x8020940d
FLUSHO = 0x800000
FS_IOC_ENABLE_VERITY = 0x80806685
FS_IOC_GETFLAGS = 0x40086601

2
unix/zerrors_linux_riscv64.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x40049409
FICLONERANGE = 0x4020940d
FLUSHO = 0x1000
FS_IOC_ENABLE_VERITY = 0x40806685
FS_IOC_GETFLAGS = 0x80086601

2
unix/zerrors_linux_s390x.go
View File

@@ -71,6 +71,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x40049409
FICLONERANGE = 0x4020940d
FLUSHO = 0x1000
FS_IOC_ENABLE_VERITY = 0x40806685
FS_IOC_GETFLAGS = 0x80086601

2
unix/zerrors_linux_sparc64.go
View File

@@ -75,6 +75,8 @@ const (
EXTPROC = 0x10000
FF1 = 0x8000
FFDLY = 0x8000
FICLONE = 0x80049409
FICLONERANGE = 0x8020940d
FLUSHO = 0x1000
FS_IOC_ENABLE_VERITY = 0x80806685
FS_IOC_GETFLAGS = 0x40086601

15
unix/ztypes_linux.go
View File

@@ -76,6 +76,21 @@ type Fsid struct {
Val [2]int32
}
type FileCloneRange struct {
Src_fd int64
Src_offset uint64
Src_length uint64
Dest_offset uint64
}
type FileDedupeRange struct {
Src_offset uint64
Src_length uint64
Dest_count uint16
Reserved1 uint16
Reserved2 uint32
}
type FscryptPolicy struct {
Version uint8
Contents_encryption_mode uint8