Merge pull request #8146 from vrothberg/image-mounts

new "image" mount type

3 files changed, 0 insertions, 266 deletions

diff --git a/vendor/github.com/containerd/continuity/syscallx/syscall_unix.go b/vendor/github.com/containerd/continuity/syscallx/syscall_unix.go
deleted file mode 100644
index 0bfa6a040..000000000
--- a/vendor/github.com/containerd/continuity/syscallx/syscall_unix.go
+++ /dev/null
@@ -1,26 +0,0 @@
-// +build !windows
-
-/*
-   Copyright The containerd Authors.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
-package syscallx
-
-import "syscall"
-
-// Readlink returns the destination of the named symbolic link.
-func Readlink(path string, buf []byte) (n int, err error) {
-	return syscall.Readlink(path, buf)
-}
diff --git a/vendor/github.com/containerd/continuity/syscallx/syscall_windows.go b/vendor/github.com/containerd/continuity/syscallx/syscall_windows.go
deleted file mode 100644
index 2ba814990..000000000
--- a/vendor/github.com/containerd/continuity/syscallx/syscall_windows.go
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
-   Copyright The containerd Authors.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
-package syscallx
-
-import (
-	"syscall"
-	"unsafe"
-)
-
-type reparseDataBuffer struct {
-	ReparseTag        uint32
-	ReparseDataLength uint16
-	Reserved          uint16
-
-	// GenericReparseBuffer
-	reparseBuffer byte
-}
-
-type mountPointReparseBuffer struct {
-	SubstituteNameOffset uint16
-	SubstituteNameLength uint16
-	PrintNameOffset      uint16
-	PrintNameLength      uint16
-	PathBuffer           [1]uint16
-}
-
-type symbolicLinkReparseBuffer struct {
-	SubstituteNameOffset uint16
-	SubstituteNameLength uint16
-	PrintNameOffset      uint16
-	PrintNameLength      uint16
-	Flags                uint32
-	PathBuffer           [1]uint16
-}
-
-const (
-	_IO_REPARSE_TAG_MOUNT_POINT = 0xA0000003
-	_SYMLINK_FLAG_RELATIVE      = 1
-)
-
-// Readlink returns the destination of the named symbolic link.
-func Readlink(path string, buf []byte) (n int, err error) {
-	fd, err := syscall.CreateFile(syscall.StringToUTF16Ptr(path), syscall.GENERIC_READ, 0, nil, syscall.OPEN_EXISTING,
-		syscall.FILE_FLAG_OPEN_REPARSE_POINT|syscall.FILE_FLAG_BACKUP_SEMANTICS, 0)
-	if err != nil {
-		return -1, err
-	}
-	defer syscall.CloseHandle(fd)
-
-	rdbbuf := make([]byte, syscall.MAXIMUM_REPARSE_DATA_BUFFER_SIZE)
-	var bytesReturned uint32
-	err = syscall.DeviceIoControl(fd, syscall.FSCTL_GET_REPARSE_POINT, nil, 0, &rdbbuf[0], uint32(len(rdbbuf)), &bytesReturned, nil)
-	if err != nil {
-		return -1, err
-	}
-
-	rdb := (*reparseDataBuffer)(unsafe.Pointer(&rdbbuf[0]))
-	var s string
-	switch rdb.ReparseTag {
-	case syscall.IO_REPARSE_TAG_SYMLINK:
-		data := (*symbolicLinkReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
-		p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
-		s = syscall.UTF16ToString(p[data.SubstituteNameOffset/2 : (data.SubstituteNameOffset+data.SubstituteNameLength)/2])
-		if data.Flags&_SYMLINK_FLAG_RELATIVE == 0 {
-			if len(s) >= 4 && s[:4] == `\??\` {
-				s = s[4:]
-				switch {
-				case len(s) >= 2 && s[1] == ':': // \??\C:\foo\bar
-					// do nothing
-				case len(s) >= 4 && s[:4] == `UNC\`: // \??\UNC\foo\bar
-					s = `\\` + s[4:]
-				default:
-					// unexpected; do nothing
-				}
-			} else {
-				// unexpected; do nothing
-			}
-		}
-	case _IO_REPARSE_TAG_MOUNT_POINT:
-		data := (*mountPointReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
-		p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
-		s = syscall.UTF16ToString(p[data.SubstituteNameOffset/2 : (data.SubstituteNameOffset+data.SubstituteNameLength)/2])
-		if len(s) >= 4 && s[:4] == `\??\` { // \??\C:\foo\bar
-			if len(s) < 48 || s[:11] != `\??\Volume{` {
-				s = s[4:]
-			}
-		} else {
-			// unexpected; do nothing
-		}
-	default:
-		// the path is not a symlink or junction but another type of reparse
-		// point
-		return -1, syscall.ENOENT
-	}
-	n = copy(buf, []byte(s))
-
-	return n, nil
-}
diff --git a/vendor/github.com/containerd/continuity/sysx/file_posix.go b/vendor/github.com/containerd/continuity/sysx/file_posix.go
deleted file mode 100644
index e28f3a1b5..000000000
--- a/vendor/github.com/containerd/continuity/sysx/file_posix.go
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
-   Copyright The containerd Authors.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
-package sysx
-
-import (
-	"os"
-	"path/filepath"
-
-	"github.com/containerd/continuity/syscallx"
-)
-
-// Readlink returns the destination of the named symbolic link.
-// If there is an error, it will be of type *PathError.
-func Readlink(name string) (string, error) {
-	for len := 128; ; len *= 2 {
-		b := make([]byte, len)
-		n, e := fixCount(syscallx.Readlink(fixLongPath(name), b))
-		if e != nil {
-			return "", &os.PathError{Op: "readlink", Path: name, Err: e}
-		}
-		if n < len {
-			return string(b[0:n]), nil
-		}
-	}
-}
-
-// Many functions in package syscall return a count of -1 instead of 0.
-// Using fixCount(call()) instead of call() corrects the count.
-func fixCount(n int, err error) (int, error) {
-	if n < 0 {
-		n = 0
-	}
-	return n, err
-}
-
-// fixLongPath returns the extended-length (\\?\-prefixed) form of
-// path when needed, in order to avoid the default 260 character file
-// path limit imposed by Windows. If path is not easily converted to
-// the extended-length form (for example, if path is a relative path
-// or contains .. elements), or is short enough, fixLongPath returns
-// path unmodified.
-//
-// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath
-func fixLongPath(path string) string {
-	// Do nothing (and don't allocate) if the path is "short".
-	// Empirically (at least on the Windows Server 2013 builder),
-	// the kernel is arbitrarily okay with < 248 bytes. That
-	// matches what the docs above say:
-	// "When using an API to create a directory, the specified
-	// path cannot be so long that you cannot append an 8.3 file
-	// name (that is, the directory name cannot exceed MAX_PATH
-	// minus 12)." Since MAX_PATH is 260, 260 - 12 = 248.
-	//
-	// The MSDN docs appear to say that a normal path that is 248 bytes long
-	// will work; empirically the path must be less then 248 bytes long.
-	if len(path) < 248 {
-		// Don't fix. (This is how Go 1.7 and earlier worked,
-		// not automatically generating the \\?\ form)
-		return path
-	}
-
-	// The extended form begins with \\?\, as in
-	// \\?\c:\windows\foo.txt or \\?\UNC\server\share\foo.txt.
-	// The extended form disables evaluation of . and .. path
-	// elements and disables the interpretation of / as equivalent
-	// to \. The conversion here rewrites / to \ and elides
-	// . elements as well as trailing or duplicate separators. For
-	// simplicity it avoids the conversion entirely for relative
-	// paths or paths containing .. elements. For now,
-	// \\server\share paths are not converted to
-	// \\?\UNC\server\share paths because the rules for doing so
-	// are less well-specified.
-	if len(path) >= 2 && path[:2] == `\\` {
-		// Don't canonicalize UNC paths.
-		return path
-	}
-	if !filepath.IsAbs(path) {
-		// Relative path
-		return path
-	}
-
-	const prefix = `\\?`
-
-	pathbuf := make([]byte, len(prefix)+len(path)+len(`\`))
-	copy(pathbuf, prefix)
-	n := len(path)
-	r, w := 0, len(prefix)
-	for r < n {
-		switch {
-		case os.IsPathSeparator(path[r]):
-			// empty block
-			r++
-		case path[r] == '.' && (r+1 == n || os.IsPathSeparator(path[r+1])):
-			// /./
-			r++
-		case r+1 < n && path[r] == '.' && path[r+1] == '.' && (r+2 == n || os.IsPathSeparator(path[r+2])):
-			// /../ is currently unhandled
-			return path
-		default:
-			pathbuf[w] = '\\'
-			w++
-			for ; r < n && !os.IsPathSeparator(path[r]); r++ {
-				pathbuf[w] = path[r]
-				w++
-			}
-		}
-	}
-	// A drive's root directory needs a trailing \
-	if w == len(`\\?\c:`) {
-		pathbuf[w] = '\\'
-		w++
-	}
-	return string(pathbuf[:w])
-}