func addBindMount(config *configs.Config, src, dest string, writeable bool) {
flags := syscall.MS_BIND | syscall.MS_REC
if !writeable {
flags |= syscall.MS_RDONLY
}
config.Mounts = append(config.Mounts, &configs.Mount{
Source: src,
Destination: dest,
Device: "bind",
Flags: flags,
})
}
func (d *Driver) setupMounts(container *configs.Config, c *execdriver.Command) error {
userMounts := make(map[string]struct{})
for _, m := range c.Mounts {
userMounts[m.Destination] = struct{}{}
}
// Filter out mounts that are overriden by user supplied mounts
var defaultMounts []*configs.Mount
_, mountDev := userMounts["/dev"]
for _, m := range container.Mounts {
if _, ok := userMounts[m.Destination]; !ok {
if mountDev && strings.HasPrefix(m.Destination, "/dev/") {
container.Devices = nil
continue
}
defaultMounts = append(defaultMounts, m)
}
}
container.Mounts = defaultMounts
for _, m := range c.Mounts {
flags := syscall.MS_BIND | syscall.MS_REC
if !m.Writable {
flags |= syscall.MS_RDONLY
}
if m.Slave {
flags |= syscall.MS_SLAVE
}
container.Mounts = append(container.Mounts, &configs.Mount{
Source: m.Source,
Destination: m.Destination,
Device: "bind",
Flags: flags,
})
}
return nil
}
func (d *Driver) setupMounts(container *configs.Config, c *execdriver.Command) error {
userMounts := make(map[string]struct{})
for _, m := range c.Mounts {
userMounts[m.Destination] = struct{}{}
}
// Filter out mounts that are overridden by user supplied mounts
var defaultMounts []*configs.Mount
_, mountDev := userMounts["/dev"]
for _, m := range container.Mounts {
if _, ok := userMounts[m.Destination]; !ok {
if mountDev && strings.HasPrefix(m.Destination, "/dev/") {
container.Devices = nil
continue
}
defaultMounts = append(defaultMounts, m)
}
}
container.Mounts = defaultMounts
mountPropagationMap := map[string]int{
"private": mount.PRIVATE,
"rprivate": mount.RPRIVATE,
"shared": mount.SHARED,
"rshared": mount.RSHARED,
"slave": mount.SLAVE,
"rslave": mount.RSLAVE,
}
for _, m := range c.Mounts {
for _, cm := range container.Mounts {
if cm.Destination == m.Destination {
return derr.ErrorCodeMountDup.WithArgs(m.Destination)
}
}
if m.Source == "tmpfs" {
var (
data = "size=65536k"
flags = syscall.MS_NOEXEC | syscall.MS_NOSUID | syscall.MS_NODEV
err error
)
if m.Data != "" {
flags, data, err = mount.ParseTmpfsOptions(m.Data)
if err != nil {
return err
}
}
container.Mounts = append(container.Mounts, &configs.Mount{
Source: m.Source,
Destination: m.Destination,
Data: data,
Device: "tmpfs",
Flags: flags,
PropagationFlags: []int{mountPropagationMap[volume.DefaultPropagationMode]},
})
continue
}
flags := syscall.MS_BIND | syscall.MS_REC
var pFlag int
if !m.Writable {
flags |= syscall.MS_RDONLY
}
// Determine property of RootPropagation based on volume
// properties. If a volume is shared, then keep root propagtion
// shared. This should work for slave and private volumes too.
//
// For slave volumes, it can be either [r]shared/[r]slave.
//
// For private volumes any root propagation value should work.
pFlag = mountPropagationMap[m.Propagation]
if pFlag == mount.SHARED || pFlag == mount.RSHARED {
if err := ensureShared(m.Source); err != nil {
return err
}
rootpg := container.RootPropagation
if rootpg != mount.SHARED && rootpg != mount.RSHARED {
execdriver.SetRootPropagation(container, mount.SHARED)
}
} else if pFlag == mount.SLAVE || pFlag == mount.RSLAVE {
if err := ensureSharedOrSlave(m.Source); err != nil {
return err
}
rootpg := container.RootPropagation
if rootpg != mount.SHARED && rootpg != mount.RSHARED && rootpg != mount.SLAVE && rootpg != mount.RSLAVE {
execdriver.SetRootPropagation(container, mount.RSLAVE)
}
}
mount := &configs.Mount{
Source: m.Source,
Destination: m.Destination,
Device: "bind",
Flags: flags,
}
if pFlag != 0 {
mount.PropagationFlags = []int{pFlag}
}
container.Mounts = append(container.Mounts, mount)
}
checkResetVolumePropagation(container)
return nil
}
func (d *Driver) setupMounts(container *configs.Config, c *execdriver.Command) error {
userMounts := make(map[string]struct{})
for _, m := range c.Mounts {
userMounts[m.Destination] = struct{}{}
}
// Filter out mounts that are overriden by user supplied mounts
var defaultMounts []*configs.Mount
_, mountDev := userMounts["/dev"]
for _, m := range container.Mounts {
if _, ok := userMounts[m.Destination]; !ok {
if mountDev && strings.HasPrefix(m.Destination, "/dev/") {
container.Devices = nil
continue
}
defaultMounts = append(defaultMounts, m)
}
}
container.Mounts = defaultMounts
for _, m := range c.Mounts {
for _, cm := range container.Mounts {
if cm.Destination == m.Destination {
return derr.ErrorCodeMountDup.WithArgs(m.Destination)
}
}
if m.Source == "tmpfs" {
var (
data = "size=65536k"
flags = syscall.MS_NOEXEC | syscall.MS_NOSUID | syscall.MS_NODEV
err error
)
fulldest := filepath.Join(c.Rootfs, m.Destination)
if m.Data != "" {
flags, data, err = mount.ParseTmpfsOptions(m.Data)
if err != nil {
return err
}
}
container.Mounts = append(container.Mounts, &configs.Mount{
Source: m.Source,
Destination: m.Destination,
Data: data,
Device: "tmpfs",
Flags: flags,
PremountCmds: genTmpfsPremountCmd(c.TmpDir, fulldest, m.Destination),
PostmountCmds: genTmpfsPostmountCmd(c.TmpDir, fulldest, m.Destination),
})
continue
}
flags := syscall.MS_BIND | syscall.MS_REC
if !m.Writable {
flags |= syscall.MS_RDONLY
}
if m.Slave {
flags |= syscall.MS_SLAVE
}
container.Mounts = append(container.Mounts, &configs.Mount{
Source: m.Source,
Destination: m.Destination,
Device: "bind",
Flags: flags,
})
}
return nil
}