d7af92e00c
This moves both the Mount type and mountinfo into a single mount package. This also opens up the root of the repo to hold the containerd client implementation. Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
package mount
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import (
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"strings"
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"golang.org/x/sys/unix"
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)
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func (m *Mount) Mount(target string) error {
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flags, data := parseMountOptions(m.Options)
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return unix.Mount(m.Source, target, m.Type, uintptr(flags), data)
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}
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func Unmount(mount string, flags int) error {
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return unix.Unmount(mount, flags)
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}
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// parseMountOptions takes fstab style mount options and parses them for
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// use with a standard mount() syscall
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func parseMountOptions(options []string) (int, string) {
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var (
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flag int
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data []string
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)
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flags := map[string]struct {
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clear bool
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flag int
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}{
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"async": {true, unix.MS_SYNCHRONOUS},
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"atime": {true, unix.MS_NOATIME},
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"bind": {false, unix.MS_BIND},
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"defaults": {false, 0},
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"dev": {true, unix.MS_NODEV},
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"diratime": {true, unix.MS_NODIRATIME},
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"dirsync": {false, unix.MS_DIRSYNC},
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"exec": {true, unix.MS_NOEXEC},
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"mand": {false, unix.MS_MANDLOCK},
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"noatime": {false, unix.MS_NOATIME},
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"nodev": {false, unix.MS_NODEV},
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"nodiratime": {false, unix.MS_NODIRATIME},
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"noexec": {false, unix.MS_NOEXEC},
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"nomand": {true, unix.MS_MANDLOCK},
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"norelatime": {true, unix.MS_RELATIME},
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"nostrictatime": {true, unix.MS_STRICTATIME},
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"nosuid": {false, unix.MS_NOSUID},
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"rbind": {false, unix.MS_BIND | unix.MS_REC},
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"relatime": {false, unix.MS_RELATIME},
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"remount": {false, unix.MS_REMOUNT},
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"ro": {false, unix.MS_RDONLY},
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"rw": {true, unix.MS_RDONLY},
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"strictatime": {false, unix.MS_STRICTATIME},
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"suid": {true, unix.MS_NOSUID},
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"sync": {false, unix.MS_SYNCHRONOUS},
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}
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for _, o := range options {
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// If the option does not exist in the flags table or the flag
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// is not supported on the platform,
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// then it is a data value for a specific fs type
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if f, exists := flags[o]; exists && f.flag != 0 {
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if f.clear {
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flag &^= f.flag
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} else {
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flag |= f.flag
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}
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} else {
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data = append(data, o)
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}
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}
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return flag, strings.Join(data, ",")
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}
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