mirror of https://github.com/docker/cli.git
Merge pull request #2657 from thaJeztah/bump_continuity
vendor: update containerd/continuity efbc4488d8fe1bdc16bde3b2d2990d9b3a899165
This commit is contained in:
Sebastiaan van Stijn
GitHub
commit
8a3788118a
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@ -4,7 +4,7 @@ github.com/Azure/go-ansiterm d6e3b3328b783f23731bc4d05887
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github.com/beorn7/perks 37c8de3658fcb183f997c4e13e8337516ab753e6 # v1.0.1
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github.com/containerd/console 8375c3424e4d7b114e8a90a4a40c8e1b40d1d4e6 # v1.0.0
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github.com/containerd/containerd c80284d4b5291a351bb471bcdabb5c1d95e7a583 # master / v1.4.0-dev
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github.com/containerd/continuity 26c1120b8d4107d2471b93ad78ef7ce1fc84c4c4
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github.com/containerd/continuity efbc4488d8fe1bdc16bde3b2d2990d9b3a899165
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github.com/containerd/cgroups 44306b6a1d46985d916b48b4199f93a378af314f
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github.com/coreos/etcd d57e8b8d97adfc4a6c224fe116714bf1a1f3beb9 # v3.3.12
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github.com/cpuguy83/go-md2man/v2 f79a8a8ca69da163eee19ab442bedad7a35bba5a # v2.0.0
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@ -117,15 +117,13 @@ func sameFile(f1, f2 *currentPath) (bool, error) {
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// If the timestamp may have been truncated in both of the
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// files, check content of file to determine difference
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if t1.Nanosecond() == 0 && t2.Nanosecond() == 0 {
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var eq bool
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if (f1.f.Mode() & os.ModeSymlink) == os.ModeSymlink {
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eq, err = compareSymlinkTarget(f1.fullPath, f2.fullPath)
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} else if f1.f.Size() > 0 {
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eq, err = compareFileContent(f1.fullPath, f2.fullPath)
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return compareSymlinkTarget(f1.fullPath, f2.fullPath)
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}
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if err != nil || !eq {
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return eq, err
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if f1.f.Size() == 0 { // if file sizes are zero length, the files are the same by definition
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return true, nil
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}
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return compareFileContent(f1.fullPath, f2.fullPath)
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} else if t1.Nanosecond() != t2.Nanosecond() {
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return false, nil
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}
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@ -1,6 +1,6 @@
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module github.com/containerd/continuity
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go 1.11
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go 1.13
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require (
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bazil.org/fuse v0.0.0-20160811212531-371fbbdaa898
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@ -1,26 +0,0 @@
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// +build !windows
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/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package syscallx
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import "syscall"
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// Readlink returns the destination of the named symbolic link.
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func Readlink(path string, buf []byte) (n int, err error) {
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return syscall.Readlink(path, buf)
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}
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@ -1,112 +0,0 @@
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/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package syscallx
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import (
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"syscall"
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"unsafe"
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)
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type reparseDataBuffer struct {
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ReparseTag uint32
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ReparseDataLength uint16
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Reserved uint16
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// GenericReparseBuffer
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reparseBuffer byte
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}
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type mountPointReparseBuffer struct {
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SubstituteNameOffset uint16
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SubstituteNameLength uint16
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PrintNameOffset uint16
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PrintNameLength uint16
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PathBuffer [1]uint16
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}
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type symbolicLinkReparseBuffer struct {
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SubstituteNameOffset uint16
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SubstituteNameLength uint16
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PrintNameOffset uint16
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PrintNameLength uint16
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Flags uint32
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PathBuffer [1]uint16
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}
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const (
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_IO_REPARSE_TAG_MOUNT_POINT = 0xA0000003
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_SYMLINK_FLAG_RELATIVE = 1
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)
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// Readlink returns the destination of the named symbolic link.
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func Readlink(path string, buf []byte) (n int, err error) {
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fd, err := syscall.CreateFile(syscall.StringToUTF16Ptr(path), syscall.GENERIC_READ, 0, nil, syscall.OPEN_EXISTING,
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syscall.FILE_FLAG_OPEN_REPARSE_POINT|syscall.FILE_FLAG_BACKUP_SEMANTICS, 0)
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if err != nil {
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return -1, err
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}
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defer syscall.CloseHandle(fd)
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rdbbuf := make([]byte, syscall.MAXIMUM_REPARSE_DATA_BUFFER_SIZE)
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var bytesReturned uint32
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err = syscall.DeviceIoControl(fd, syscall.FSCTL_GET_REPARSE_POINT, nil, 0, &rdbbuf[0], uint32(len(rdbbuf)), &bytesReturned, nil)
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if err != nil {
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return -1, err
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}
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rdb := (*reparseDataBuffer)(unsafe.Pointer(&rdbbuf[0]))
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var s string
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switch rdb.ReparseTag {
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case syscall.IO_REPARSE_TAG_SYMLINK:
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data := (*symbolicLinkReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
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p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
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s = syscall.UTF16ToString(p[data.SubstituteNameOffset/2 : (data.SubstituteNameOffset+data.SubstituteNameLength)/2])
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if data.Flags&_SYMLINK_FLAG_RELATIVE == 0 {
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if len(s) >= 4 && s[:4] == `\??\` {
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s = s[4:]
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switch {
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case len(s) >= 2 && s[1] == ':': // \??\C:\foo\bar
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// do nothing
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case len(s) >= 4 && s[:4] == `UNC\`: // \??\UNC\foo\bar
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s = `\\` + s[4:]
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default:
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// unexpected; do nothing
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}
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} else {
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// unexpected; do nothing
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}
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}
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case _IO_REPARSE_TAG_MOUNT_POINT:
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data := (*mountPointReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
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p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
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s = syscall.UTF16ToString(p[data.SubstituteNameOffset/2 : (data.SubstituteNameOffset+data.SubstituteNameLength)/2])
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if len(s) >= 4 && s[:4] == `\??\` { // \??\C:\foo\bar
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if len(s) < 48 || s[:11] != `\??\Volume{` {
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s = s[4:]
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}
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} else {
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// unexpected; do nothing
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}
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default:
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// the path is not a symlink or junction but another type of reparse
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// point
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return -1, syscall.ENOENT
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}
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n = copy(buf, []byte(s))
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return n, nil
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}
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@ -1,128 +0,0 @@
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/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package sysx
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import (
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"os"
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"path/filepath"
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"github.com/containerd/continuity/syscallx"
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)
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// Readlink returns the destination of the named symbolic link.
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// If there is an error, it will be of type *PathError.
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func Readlink(name string) (string, error) {
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for len := 128; ; len *= 2 {
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b := make([]byte, len)
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n, e := fixCount(syscallx.Readlink(fixLongPath(name), b))
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if e != nil {
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return "", &os.PathError{Op: "readlink", Path: name, Err: e}
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}
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if n < len {
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return string(b[0:n]), nil
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}
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}
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}
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// Many functions in package syscall return a count of -1 instead of 0.
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// Using fixCount(call()) instead of call() corrects the count.
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func fixCount(n int, err error) (int, error) {
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if n < 0 {
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n = 0
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}
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return n, err
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}
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// fixLongPath returns the extended-length (\\?\-prefixed) form of
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// path when needed, in order to avoid the default 260 character file
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// path limit imposed by Windows. If path is not easily converted to
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// the extended-length form (for example, if path is a relative path
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// or contains .. elements), or is short enough, fixLongPath returns
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// path unmodified.
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//
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// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath
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func fixLongPath(path string) string {
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// Do nothing (and don't allocate) if the path is "short".
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// Empirically (at least on the Windows Server 2013 builder),
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// the kernel is arbitrarily okay with < 248 bytes. That
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// matches what the docs above say:
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// "When using an API to create a directory, the specified
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// path cannot be so long that you cannot append an 8.3 file
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// name (that is, the directory name cannot exceed MAX_PATH
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// minus 12)." Since MAX_PATH is 260, 260 - 12 = 248.
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//
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// The MSDN docs appear to say that a normal path that is 248 bytes long
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// will work; empirically the path must be less then 248 bytes long.
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if len(path) < 248 {
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// Don't fix. (This is how Go 1.7 and earlier worked,
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// not automatically generating the \\?\ form)
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return path
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}
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// The extended form begins with \\?\, as in
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// \\?\c:\windows\foo.txt or \\?\UNC\server\share\foo.txt.
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// The extended form disables evaluation of . and .. path
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// elements and disables the interpretation of / as equivalent
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// to \. The conversion here rewrites / to \ and elides
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// . elements as well as trailing or duplicate separators. For
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// simplicity it avoids the conversion entirely for relative
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// paths or paths containing .. elements. For now,
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// \\server\share paths are not converted to
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// \\?\UNC\server\share paths because the rules for doing so
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// are less well-specified.
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if len(path) >= 2 && path[:2] == `\\` {
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// Don't canonicalize UNC paths.
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return path
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}
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if !filepath.IsAbs(path) {
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// Relative path
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return path
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}
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const prefix = `\\?`
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pathbuf := make([]byte, len(prefix)+len(path)+len(`\`))
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copy(pathbuf, prefix)
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n := len(path)
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r, w := 0, len(prefix)
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for r < n {
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switch {
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case os.IsPathSeparator(path[r]):
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// empty block
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r++
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case path[r] == '.' && (r+1 == n || os.IsPathSeparator(path[r+1])):
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// /./
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r++
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case r+1 < n && path[r] == '.' && path[r+1] == '.' && (r+2 == n || os.IsPathSeparator(path[r+2])):
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// /../ is currently unhandled
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return path
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default:
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pathbuf[w] = '\\'
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w++
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for ; r < n && !os.IsPathSeparator(path[r]); r++ {
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pathbuf[w] = path[r]
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w++
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}
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}
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}
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// A drive's root directory needs a trailing \
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if w == len(`\\?\c:`) {
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pathbuf[w] = '\\'
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w++
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}
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return string(pathbuf[:w])
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}
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@ -20,7 +20,6 @@ package sysx
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import (
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"bytes"
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"syscall"
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"golang.org/x/sys/unix"
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)
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@ -66,60 +65,53 @@ func LGetxattr(path, attr string) ([]byte, error) {
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return getxattrAll(path, attr, unix.Lgetxattr)
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}
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const defaultXattrBufferSize = 5
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const defaultXattrBufferSize = 128
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type listxattrFunc func(path string, dest []byte) (int, error)
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func listxattrAll(path string, listFunc listxattrFunc) ([]string, error) {
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var p []byte // nil on first execution
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for {
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n, err := listFunc(path, p) // first call gets buffer size.
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buf := make([]byte, defaultXattrBufferSize)
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n, err := listFunc(path, buf)
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for err == unix.ERANGE {
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// Buffer too small, use zero-sized buffer to get the actual size
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n, err = listFunc(path, []byte{})
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if err != nil {
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return nil, err
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}
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if n > len(p) {
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p = make([]byte, n)
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continue
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}
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p = p[:n]
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ps := bytes.Split(bytes.TrimSuffix(p, []byte{0}), []byte{0})
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var entries []string
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for _, p := range ps {
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s := string(p)
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if s != "" {
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entries = append(entries, s)
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}
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}
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return entries, nil
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buf = make([]byte, n)
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n, err = listFunc(path, buf)
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}
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if err != nil {
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return nil, err
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}
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ps := bytes.Split(bytes.TrimSuffix(buf[:n], []byte{0}), []byte{0})
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var entries []string
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for _, p := range ps {
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if len(p) > 0 {
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entries = append(entries, string(p))
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}
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}
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return entries, nil
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}
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type getxattrFunc func(string, string, []byte) (int, error)
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func getxattrAll(path, attr string, getFunc getxattrFunc) ([]byte, error) {
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p := make([]byte, defaultXattrBufferSize)
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for {
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n, err := getFunc(path, attr, p)
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buf := make([]byte, defaultXattrBufferSize)
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n, err := getFunc(path, attr, buf)
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for err == unix.ERANGE {
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// Buffer too small, use zero-sized buffer to get the actual size
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n, err = getFunc(path, attr, []byte{})
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if err != nil {
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if errno, ok := err.(syscall.Errno); ok && errno == syscall.ERANGE {
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p = make([]byte, len(p)*2) // this can't be ideal.
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continue // try again!
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}
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return nil, err
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}
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|
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// realloc to correct size and repeat
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if n > len(p) {
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p = make([]byte, n)
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continue
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}
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return p[:n], nil
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buf = make([]byte, n)
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n, err = getFunc(path, attr, buf)
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}
|
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if err != nil {
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return nil, err
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}
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return buf[:n], nil
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}
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|
|
|
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|
|
@ -23,7 +23,7 @@ import (
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"runtime"
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)
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var unsupported = errors.New("extended attributes unsupported on " + runtime.GOOS)
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var errUnsupported = errors.New("extended attributes unsupported on " + runtime.GOOS)
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|
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// Listxattr calls syscall listxattr and reads all content
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// and returns a string array
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@ -33,17 +33,17 @@ func Listxattr(path string) ([]string, error) {
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|
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// Removexattr calls syscall removexattr
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func Removexattr(path string, attr string) (err error) {
|
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return unsupported
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return errUnsupported
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}
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|
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// Setxattr calls syscall setxattr
|
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func Setxattr(path string, attr string, data []byte, flags int) (err error) {
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return unsupported
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return errUnsupported
|
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}
|
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|
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// Getxattr calls syscall getxattr
|
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func Getxattr(path, attr string) ([]byte, error) {
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return []byte{}, unsupported
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return []byte{}, errUnsupported
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}
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|
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// LListxattr lists xattrs, not following symlinks
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|
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@ -53,12 +53,12 @@ func LListxattr(path string) ([]string, error) {
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|
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// LRemovexattr removes an xattr, not following symlinks
|
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func LRemovexattr(path string, attr string) (err error) {
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return unsupported
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return errUnsupported
|
||||
}
|
||||
|
||||
// LSetxattr sets an xattr, not following symlinks
|
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func LSetxattr(path string, attr string, data []byte, flags int) (err error) {
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return unsupported
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return errUnsupported
|
||||
}
|
||||
|
||||
// LGetxattr gets an xattr, not following symlinks
|
||||
|
|
|
|||
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Reference in New Issue