diff options
Diffstat (limited to 'vendor/github.com/moby/sys')
| -rw-r--r-- | vendor/github.com/moby/sys/mount/LICENSE | 202 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/flags.go | 137 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/flags_freebsd.go | 48 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/flags_linux.go | 87 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/flags_unsupported.go | 30 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/go.mod | 8 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/go.sum | 4 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/mount.go | 67 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/mount_errors.go | 46 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/mounter_freebsd.go | 59 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/mounter_linux.go | 73 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/mounter_unsupported.go | 7 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/sharedsubtree_linux.go | 73 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/unmount_unix.go | 26 | ||||
| -rw-r--r-- | vendor/github.com/moby/sys/mount/unmount_unsupported.go | 11 |
15 files changed, 878 insertions, 0 deletions
diff --git a/vendor/github.com/moby/sys/mount/LICENSE b/vendor/github.com/moby/sys/mount/LICENSE new file mode 100644 index 000000000..d64569567 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + 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. diff --git a/vendor/github.com/moby/sys/mount/flags.go b/vendor/github.com/moby/sys/mount/flags.go new file mode 100644 index 000000000..d514a9d8e --- /dev/null +++ b/vendor/github.com/moby/sys/mount/flags.go @@ -0,0 +1,137 @@ +package mount + +import ( + "fmt" + "strings" +) + +var flags = map[string]struct { + clear bool + flag int +}{ + "defaults": {false, 0}, + "ro": {false, RDONLY}, + "rw": {true, RDONLY}, + "suid": {true, NOSUID}, + "nosuid": {false, NOSUID}, + "dev": {true, NODEV}, + "nodev": {false, NODEV}, + "exec": {true, NOEXEC}, + "noexec": {false, NOEXEC}, + "sync": {false, SYNCHRONOUS}, + "async": {true, SYNCHRONOUS}, + "dirsync": {false, DIRSYNC}, + "remount": {false, REMOUNT}, + "mand": {false, MANDLOCK}, + "nomand": {true, MANDLOCK}, + "atime": {true, NOATIME}, + "noatime": {false, NOATIME}, + "diratime": {true, NODIRATIME}, + "nodiratime": {false, NODIRATIME}, + "bind": {false, BIND}, + "rbind": {false, RBIND}, + "unbindable": {false, UNBINDABLE}, + "runbindable": {false, RUNBINDABLE}, + "private": {false, PRIVATE}, + "rprivate": {false, RPRIVATE}, + "shared": {false, SHARED}, + "rshared": {false, RSHARED}, + "slave": {false, SLAVE}, + "rslave": {false, RSLAVE}, + "relatime": {false, RELATIME}, + "norelatime": {true, RELATIME}, + "strictatime": {false, STRICTATIME}, + "nostrictatime": {true, STRICTATIME}, +} + +var validFlags = map[string]bool{ + "": true, + "size": true, + "mode": true, + "uid": true, + "gid": true, + "nr_inodes": true, + "nr_blocks": true, + "mpol": true, +} + +var propagationFlags = map[string]bool{ + "bind": true, + "rbind": true, + "unbindable": true, + "runbindable": true, + "private": true, + "rprivate": true, + "shared": true, + "rshared": true, + "slave": true, + "rslave": true, +} + +// MergeTmpfsOptions merge mount options to make sure there is no duplicate. +func MergeTmpfsOptions(options []string) ([]string, error) { + // We use collisions maps to remove duplicates. + // For flag, the key is the flag value (the key for propagation flag is -1) + // For data=value, the key is the data + flagCollisions := map[int]bool{} + dataCollisions := map[string]bool{} + + var newOptions []string + // We process in reverse order + for i := len(options) - 1; i >= 0; i-- { + option := options[i] + if option == "defaults" { + continue + } + if f, ok := flags[option]; ok && f.flag != 0 { + // There is only one propagation mode + key := f.flag + if propagationFlags[option] { + key = -1 + } + // Check to see if there is collision for flag + if !flagCollisions[key] { + // We prepend the option and add to collision map + newOptions = append([]string{option}, newOptions...) + flagCollisions[key] = true + } + continue + } + opt := strings.SplitN(option, "=", 2) + if len(opt) != 2 || !validFlags[opt[0]] { + return nil, fmt.Errorf("Invalid tmpfs option %q", opt) + } + if !dataCollisions[opt[0]] { + // We prepend the option and add to collision map + newOptions = append([]string{option}, newOptions...) + dataCollisions[opt[0]] = true + } + } + + return newOptions, nil +} + +// Parse fstab type mount options into mount() flags +// and device specific data +func parseOptions(options string) (int, string) { + var ( + flag int + data []string + ) + + for _, o := range strings.Split(options, ",") { + // If the option does not exist in the flags table or the flag + // is not supported on the platform, + // then it is a data value for a specific fs type + if f, exists := flags[o]; exists && f.flag != 0 { + if f.clear { + flag &= ^f.flag + } else { + flag |= f.flag + } + } else { + data = append(data, o) + } + } + return flag, strings.Join(data, ",") +} diff --git a/vendor/github.com/moby/sys/mount/flags_freebsd.go b/vendor/github.com/moby/sys/mount/flags_freebsd.go new file mode 100644 index 000000000..69c50680d --- /dev/null +++ b/vendor/github.com/moby/sys/mount/flags_freebsd.go @@ -0,0 +1,48 @@ +// +build freebsd,cgo + +package mount + +/* +#include <sys/mount.h> +*/ +import "C" + +const ( + // RDONLY will mount the filesystem as read-only. + RDONLY = C.MNT_RDONLY + + // NOSUID will not allow set-user-identifier or set-group-identifier bits to + // take effect. + NOSUID = C.MNT_NOSUID + + // NOEXEC will not allow execution of any binaries on the mounted file system. + NOEXEC = C.MNT_NOEXEC + + // SYNCHRONOUS will allow any I/O to the file system to be done synchronously. + SYNCHRONOUS = C.MNT_SYNCHRONOUS + + // NOATIME will not update the file access time when reading from a file. + NOATIME = C.MNT_NOATIME +) + +// These flags are unsupported. +const ( + BIND = 0 + DIRSYNC = 0 + MANDLOCK = 0 + NODEV = 0 + NODIRATIME = 0 + UNBINDABLE = 0 + RUNBINDABLE = 0 + PRIVATE = 0 + RPRIVATE = 0 + SHARED = 0 + RSHARED = 0 + SLAVE = 0 + RSLAVE = 0 + RBIND = 0 + RELATIME = 0 + REMOUNT = 0 + STRICTATIME = 0 + mntDetach = 0 +) diff --git a/vendor/github.com/moby/sys/mount/flags_linux.go b/vendor/github.com/moby/sys/mount/flags_linux.go new file mode 100644 index 000000000..0425d0dd6 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/flags_linux.go @@ -0,0 +1,87 @@ +package mount + +import ( + "golang.org/x/sys/unix" +) + +const ( + // RDONLY will mount the file system read-only. + RDONLY = unix.MS_RDONLY + + // NOSUID will not allow set-user-identifier or set-group-identifier bits to + // take effect. + NOSUID = unix.MS_NOSUID + + // NODEV will not interpret character or block special devices on the file + // system. + NODEV = unix.MS_NODEV + + // NOEXEC will not allow execution of any binaries on the mounted file system. + NOEXEC = unix.MS_NOEXEC + + // SYNCHRONOUS will allow I/O to the file system to be done synchronously. + SYNCHRONOUS = unix.MS_SYNCHRONOUS + + // DIRSYNC will force all directory updates within the file system to be done + // synchronously. This affects the following system calls: create, link, + // unlink, symlink, mkdir, rmdir, mknod and rename. + DIRSYNC = unix.MS_DIRSYNC + + // REMOUNT will attempt to remount an already-mounted file system. This is + // commonly used to change the mount flags for a file system, especially to + // make a readonly file system writeable. It does not change device or mount + // point. + REMOUNT = unix.MS_REMOUNT + + // MANDLOCK will force mandatory locks on a filesystem. + MANDLOCK = unix.MS_MANDLOCK + + // NOATIME will not update the file access time when reading from a file. + NOATIME = unix.MS_NOATIME + + // NODIRATIME will not update the directory access time. + NODIRATIME = unix.MS_NODIRATIME + + // BIND remounts a subtree somewhere else. + BIND = unix.MS_BIND + + // RBIND remounts a subtree and all possible submounts somewhere else. + RBIND = unix.MS_BIND | unix.MS_REC + + // UNBINDABLE creates a mount which cannot be cloned through a bind operation. + UNBINDABLE = unix.MS_UNBINDABLE + + // RUNBINDABLE marks the entire mount tree as UNBINDABLE. + RUNBINDABLE = unix.MS_UNBINDABLE | unix.MS_REC + + // PRIVATE creates a mount which carries no propagation abilities. + PRIVATE = unix.MS_PRIVATE + + // RPRIVATE marks the entire mount tree as PRIVATE. + RPRIVATE = unix.MS_PRIVATE | unix.MS_REC + + // SLAVE creates a mount which receives propagation from its master, but not + // vice versa. + SLAVE = unix.MS_SLAVE + + // RSLAVE marks the entire mount tree as SLAVE. + RSLAVE = unix.MS_SLAVE | unix.MS_REC + + // SHARED creates a mount which provides the ability to create mirrors of + // that mount such that mounts and unmounts within any of the mirrors + // propagate to the other mirrors. + SHARED = unix.MS_SHARED + + // RSHARED marks the entire mount tree as SHARED. + RSHARED = unix.MS_SHARED | unix.MS_REC + + // RELATIME updates inode access times relative to modify or change time. + RELATIME = unix.MS_RELATIME + + // STRICTATIME allows to explicitly request full atime updates. This makes + // it possible for the kernel to default to relatime or noatime but still + // allow userspace to override it. + STRICTATIME = unix.MS_STRICTATIME + + mntDetach = unix.MNT_DETACH +) diff --git a/vendor/github.com/moby/sys/mount/flags_unsupported.go b/vendor/github.com/moby/sys/mount/flags_unsupported.go new file mode 100644 index 000000000..e1d64f6b9 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/flags_unsupported.go @@ -0,0 +1,30 @@ +// +build !linux,!freebsd freebsd,!cgo + +package mount + +// These flags are unsupported. +const ( + BIND = 0 + DIRSYNC = 0 + MANDLOCK = 0 + NOATIME = 0 + NODEV = 0 + NODIRATIME = 0 + NOEXEC = 0 + NOSUID = 0 + UNBINDABLE = 0 + RUNBINDABLE = 0 + PRIVATE = 0 + RPRIVATE = 0 + SHARED = 0 + RSHARED = 0 + SLAVE = 0 + RSLAVE = 0 + RBIND = 0 + RELATIME = 0 + REMOUNT = 0 + STRICTATIME = 0 + SYNCHRONOUS = 0 + RDONLY = 0 + mntDetach = 0 +) diff --git a/vendor/github.com/moby/sys/mount/go.mod b/vendor/github.com/moby/sys/mount/go.mod new file mode 100644 index 000000000..21cef0a95 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/go.mod @@ -0,0 +1,8 @@ +module github.com/moby/sys/mount + +go 1.14 + +require ( + github.com/moby/sys/mountinfo v0.1.0 + golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae +) diff --git a/vendor/github.com/moby/sys/mount/go.sum b/vendor/github.com/moby/sys/mount/go.sum new file mode 100644 index 000000000..ae99f8596 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/go.sum @@ -0,0 +1,4 @@ +github.com/moby/sys/mountinfo v0.1.0 h1:r8vMRbMAFEAfiNptYVokP+nfxPJzvRuia5e2vzXtENo= +github.com/moby/sys/mountinfo v0.1.0/go.mod h1:w2t2Avltqx8vE7gX5l+QiBKxODu2TX0+Syr3h52Tw4o= +golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8= +golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= diff --git a/vendor/github.com/moby/sys/mount/mount.go b/vendor/github.com/moby/sys/mount/mount.go new file mode 100644 index 000000000..4a7bb27b1 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/mount.go @@ -0,0 +1,67 @@ +// +build go1.13 + +package mount + +import ( + "fmt" + "sort" + + "github.com/moby/sys/mountinfo" +) + +// Mount will mount filesystem according to the specified configuration. +// Options must be specified like the mount or fstab unix commands: +// "opt1=val1,opt2=val2". See flags.go for supported option flags. +func Mount(device, target, mType, options string) error { + flag, data := parseOptions(options) + return mount(device, target, mType, uintptr(flag), data) +} + +// Unmount lazily unmounts a filesystem on supported platforms, otherwise does +// a normal unmount. If target is not a mount point, no error is returned. +func Unmount(target string) error { + return unmount(target, mntDetach) +} + +// RecursiveUnmount unmounts the target and all mounts underneath, starting +// with the deepest mount first. The argument does not have to be a mount +// point itself. +func RecursiveUnmount(target string) error { + // Fast path, works if target is a mount point that can be unmounted. + // On Linux, mntDetach flag ensures a recursive unmount. For other + // platforms, if there are submounts, we'll get EBUSY (and fall back + // to the slow path). NOTE we do not ignore EINVAL here as target might + // not be a mount point itself (but there can be mounts underneath). + if err := unmountBare(target, mntDetach); err == nil { + return nil + } + + // Slow path: get all submounts, sort, unmount one by one. + mounts, err := mountinfo.GetMounts(mountinfo.PrefixFilter(target)) + if err != nil { + return err + } + + // Make the deepest mount be first + sort.Slice(mounts, func(i, j int) bool { + return len(mounts[i].Mountpoint) > len(mounts[j].Mountpoint) + }) + + var suberr error + for i, m := range mounts { + err = unmount(m.Mountpoint, mntDetach) + if err != nil { + if i == len(mounts)-1 { // last mount + return fmt.Errorf("%w (possible cause: %s)", err, suberr) + } + // This is a submount, we can ignore the error for now, + // the final unmount will fail if this is a real problem. + // With that in mind, the _first_ failed unmount error + // might be the real error cause, so let's keep it. + if suberr == nil { + suberr = err + } + } + } + return nil +} diff --git a/vendor/github.com/moby/sys/mount/mount_errors.go b/vendor/github.com/moby/sys/mount/mount_errors.go new file mode 100644 index 000000000..936a26373 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/mount_errors.go @@ -0,0 +1,46 @@ +// +build !windows + +package mount + +import "strconv" + +// mountError records an error from mount or unmount operation +type mountError struct { + op string + source, target string + flags uintptr + data string + err error +} + +func (e *mountError) Error() string { + out := e.op + " " + + if e.source != "" { + out += e.source + ":" + e.target + } else { + out += e.target + } + + if e.flags != uintptr(0) { + out += ", flags: 0x" + strconv.FormatUint(uint64(e.flags), 16) + } + if e.data != "" { + out += ", data: " + e.data + } + + out += ": " + e.err.Error() + return out +} + +// Cause returns the underlying cause of the error. +// This is a convention used in github.com/pkg/errors +func (e *mountError) Cause() error { + return e.err +} + +// Unwrap returns the underlying error. +// This is a convention used in golang 1.13+ +func (e *mountError) Unwrap() error { + return e.err +} diff --git a/vendor/github.com/moby/sys/mount/mounter_freebsd.go b/vendor/github.com/moby/sys/mount/mounter_freebsd.go new file mode 100644 index 000000000..3964af4f7 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/mounter_freebsd.go @@ -0,0 +1,59 @@ +package mount + +/* +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <sys/_iovec.h> +#include <sys/mount.h> +#include <sys/param.h> +*/ +import "C" + +import ( + "strings" + "syscall" + "unsafe" +) + +func allocateIOVecs(options []string) []C.struct_iovec { + out := make([]C.struct_iovec, len(options)) + for i, option := range options { + out[i].iov_base = unsafe.Pointer(C.CString(option)) + out[i].iov_len = C.size_t(len(option) + 1) + } + return out +} + +func mount(device, target, mType string, flag uintptr, data string) error { + isNullFS := false + + xs := strings.Split(data, ",") + for _, x := range xs { + if x == "bind" { + isNullFS = true + } + } + + options := []string{"fspath", target} + if isNullFS { + options = append(options, "fstype", "nullfs", "target", device) + } else { + options = append(options, "fstype", mType, "from", device) + } + rawOptions := allocateIOVecs(options) + for _, rawOption := range rawOptions { + defer C.free(rawOption.iov_base) + } + + if errno := C.nmount(&rawOptions[0], C.uint(len(options)), C.int(flag)); errno != 0 { + return &mountError{ + op: "mount", + source: device, + target: target, + flags: flag, + err: syscall.Errno(errno), + } + } + return nil +} diff --git a/vendor/github.com/moby/sys/mount/mounter_linux.go b/vendor/github.com/moby/sys/mount/mounter_linux.go new file mode 100644 index 000000000..0c477cc3d --- /dev/null +++ b/vendor/github.com/moby/sys/mount/mounter_linux.go @@ -0,0 +1,73 @@ +package mount + +import ( + "golang.org/x/sys/unix" +) + +const ( + // ptypes is the set propagation types. + ptypes = unix.MS_SHARED | unix.MS_PRIVATE | unix.MS_SLAVE | unix.MS_UNBINDABLE + + // pflags is the full set valid flags for a change propagation call. + pflags = ptypes | unix.MS_REC | unix.MS_SILENT + + // broflags is the combination of bind and read only + broflags = unix.MS_BIND | unix.MS_RDONLY +) + +// isremount returns true if either device name or flags identify a remount request, false otherwise. +func isremount(device string, flags uintptr) bool { + switch { + // We treat device "" and "none" as a remount request to provide compatibility with + // requests that don't explicitly set MS_REMOUNT such as those manipulating bind mounts. + case flags&unix.MS_REMOUNT != 0, device == "", device == "none": + return true + default: + return false + } +} + +func mount(device, target, mType string, flags uintptr, data string) error { + oflags := flags &^ ptypes + if !isremount(device, flags) || data != "" { + // Initial call applying all non-propagation flags for mount + // or remount with changed data + if err := unix.Mount(device, target, mType, oflags, data); err != nil { + return &mountError{ + op: "mount", + source: device, + target: target, + flags: oflags, + data: data, + err: err, + } + } + } + + if flags&ptypes != 0 { + // Change the propagation type. + if err := unix.Mount("", target, "", flags&pflags, ""); err != nil { + return &mountError{ + op: "remount", + target: target, + flags: flags & pflags, + err: err, + } + } + } + + if oflags&broflags == broflags { + // Remount the bind to apply read only. + if err := unix.Mount("", target, "", oflags|unix.MS_REMOUNT, ""); err != nil { + return &mountError{ + op: "remount-ro", + target: target, + flags: oflags | unix.MS_REMOUNT, + err: err, + } + + } + } + + return nil +} diff --git a/vendor/github.com/moby/sys/mount/mounter_unsupported.go b/vendor/github.com/moby/sys/mount/mounter_unsupported.go new file mode 100644 index 000000000..15380671c --- /dev/null +++ b/vendor/github.com/moby/sys/mount/mounter_unsupported.go @@ -0,0 +1,7 @@ +// +build !linux,!freebsd freebsd,!cgo + +package mount + +func mount(device, target, mType string, flag uintptr, data string) error { + panic("Not implemented") +} diff --git a/vendor/github.com/moby/sys/mount/sharedsubtree_linux.go b/vendor/github.com/moby/sys/mount/sharedsubtree_linux.go new file mode 100644 index 000000000..948e6bacd --- /dev/null +++ b/vendor/github.com/moby/sys/mount/sharedsubtree_linux.go @@ -0,0 +1,73 @@ +package mount + +import "github.com/moby/sys/mountinfo" + +// MakeShared ensures a mounted filesystem has the SHARED mount option enabled. +// See the supported options in flags.go for further reference. +func MakeShared(mountPoint string) error { + return ensureMountedAs(mountPoint, SHARED) +} + +// MakeRShared ensures a mounted filesystem has the RSHARED mount option enabled. +// See the supported options in flags.go for further reference. +func MakeRShared(mountPoint string) error { + return ensureMountedAs(mountPoint, RSHARED) +} + +// MakePrivate ensures a mounted filesystem has the PRIVATE mount option enabled. +// See the supported options in flags.go for further reference. +func MakePrivate(mountPoint string) error { + return ensureMountedAs(mountPoint, PRIVATE) +} + +// MakeRPrivate ensures a mounted filesystem has the RPRIVATE mount option +// enabled. See the supported options in flags.go for further reference. +func MakeRPrivate(mountPoint string) error { + return ensureMountedAs(mountPoint, RPRIVATE) +} + +// MakeSlave ensures a mounted filesystem has the SLAVE mount option enabled. +// See the supported options in flags.go for further reference. +func MakeSlave(mountPoint string) error { + return ensureMountedAs(mountPoint, SLAVE) +} + +// MakeRSlave ensures a mounted filesystem has the RSLAVE mount option enabled. +// See the supported options in flags.go for further reference. +func MakeRSlave(mountPoint string) error { + return ensureMountedAs(mountPoint, RSLAVE) +} + +// MakeUnbindable ensures a mounted filesystem has the UNBINDABLE mount option +// enabled. See the supported options in flags.go for further reference. +func MakeUnbindable(mountPoint string) error { + return ensureMountedAs(mountPoint, UNBINDABLE) +} + +// MakeRUnbindable ensures a mounted filesystem has the RUNBINDABLE mount +// option enabled. See the supported options in flags.go for further reference. +func MakeRUnbindable(mountPoint string) error { + return ensureMountedAs(mountPoint, RUNBINDABLE) +} + +// MakeMount ensures that the file or directory given is a mount point, +// bind mounting it to itself it case it is not. +func MakeMount(mnt string) error { + mounted, err := mountinfo.Mounted(mnt) + if err != nil { + return err + } + if mounted { + return nil + } + + return mount(mnt, mnt, "none", uintptr(BIND), "") +} + +func ensureMountedAs(mnt string, flags int) error { + if err := MakeMount(mnt); err != nil { + return err + } + + return mount("", mnt, "none", uintptr(flags), "") +} diff --git a/vendor/github.com/moby/sys/mount/unmount_unix.go b/vendor/github.com/moby/sys/mount/unmount_unix.go new file mode 100644 index 000000000..924d059a7 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/unmount_unix.go @@ -0,0 +1,26 @@ +// +build !windows + +package mount + +import "golang.org/x/sys/unix" + +func unmountBare(target string, flags int) error { + return unix.Unmount(target, flags) +} + +func unmount(target string, flags int) error { + err := unmountBare(target, flags) + if err == nil || err == unix.EINVAL { + // Ignore "not mounted" error here. Note the same error + // can be returned if flags are invalid, so this code + // assumes that the flags value is always correct. + return nil + } + + return &mountError{ + op: "umount", + target: target, + flags: uintptr(flags), + err: err, + } +} diff --git a/vendor/github.com/moby/sys/mount/unmount_unsupported.go b/vendor/github.com/moby/sys/mount/unmount_unsupported.go new file mode 100644 index 000000000..4d6073ec6 --- /dev/null +++ b/vendor/github.com/moby/sys/mount/unmount_unsupported.go @@ -0,0 +1,11 @@ +// +build windows + +package mount + +func unmountBare(_ string, _ int) error { + panic("Not implemented") +} + +func unmount(_ string, _ int) error { + panic("Not implemented") +} |