1d27259777
This mainly fixes Linux vs generic Unix differences, with some differences between Darwin and Freebsd (which are close bit not identical). Should make fixing for other Unix platforms easier. Note there are not yet `runc` equivalents for these platforms; my current use case is image manipulation for the `moby` tool. However there is interest in OCI runtime ports for both platforms. Current status is that MacOS can build and run `ctr`, `dist` and `containerd` and some operations are supported. FreeBSD 11 still needs some more fixes to continuity for extended attributes. Signed-off-by: Justin Cormack <justin.cormack@docker.com>
71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
package containerd
|
|
|
|
import (
|
|
"strings"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
func (m *Mount) Mount(target string) error {
|
|
flags, data := parseMountOptions(m.Options)
|
|
return unix.Mount(m.Source, target, m.Type, uintptr(flags), data)
|
|
}
|
|
|
|
func Unmount(mount string, flags int) error {
|
|
return unix.Unmount(mount, flags)
|
|
}
|
|
|
|
// parseMountOptions takes fstab style mount options and parses them for
|
|
// use with a standard mount() syscall
|
|
func parseMountOptions(options []string) (int, string) {
|
|
var (
|
|
flag int
|
|
data []string
|
|
)
|
|
flags := map[string]struct {
|
|
clear bool
|
|
flag int
|
|
}{
|
|
"async": {true, unix.MS_SYNCHRONOUS},
|
|
"atime": {true, unix.MS_NOATIME},
|
|
"bind": {false, unix.MS_BIND},
|
|
"defaults": {false, 0},
|
|
"dev": {true, unix.MS_NODEV},
|
|
"diratime": {true, unix.MS_NODIRATIME},
|
|
"dirsync": {false, unix.MS_DIRSYNC},
|
|
"exec": {true, unix.MS_NOEXEC},
|
|
"mand": {false, unix.MS_MANDLOCK},
|
|
"noatime": {false, unix.MS_NOATIME},
|
|
"nodev": {false, unix.MS_NODEV},
|
|
"nodiratime": {false, unix.MS_NODIRATIME},
|
|
"noexec": {false, unix.MS_NOEXEC},
|
|
"nomand": {true, unix.MS_MANDLOCK},
|
|
"norelatime": {true, unix.MS_RELATIME},
|
|
"nostrictatime": {true, unix.MS_STRICTATIME},
|
|
"nosuid": {false, unix.MS_NOSUID},
|
|
"rbind": {false, unix.MS_BIND | unix.MS_REC},
|
|
"relatime": {false, unix.MS_RELATIME},
|
|
"remount": {false, unix.MS_REMOUNT},
|
|
"ro": {false, unix.MS_RDONLY},
|
|
"rw": {true, unix.MS_RDONLY},
|
|
"strictatime": {false, unix.MS_STRICTATIME},
|
|
"suid": {true, unix.MS_NOSUID},
|
|
"sync": {false, unix.MS_SYNCHRONOUS},
|
|
}
|
|
for _, o := range 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, ",")
|
|
}
|