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Diffstat (limited to 'runsc/boot/fs.go')
-rw-r--r--runsc/boot/fs.go84
1 files changed, 46 insertions, 38 deletions
diff --git a/runsc/boot/fs.go b/runsc/boot/fs.go
index 4875452e2..e1181271a 100644
--- a/runsc/boot/fs.go
+++ b/runsc/boot/fs.go
@@ -37,6 +37,12 @@ import (
"gvisor.dev/gvisor/pkg/sentry/fs"
"gvisor.dev/gvisor/pkg/sentry/fs/gofer"
"gvisor.dev/gvisor/pkg/sentry/fs/ramfs"
+ "gvisor.dev/gvisor/pkg/sentry/fsimpl/devpts"
+ "gvisor.dev/gvisor/pkg/sentry/fsimpl/devtmpfs"
+ gofervfs2 "gvisor.dev/gvisor/pkg/sentry/fsimpl/gofer"
+ procvfs2 "gvisor.dev/gvisor/pkg/sentry/fsimpl/proc"
+ sysvfs2 "gvisor.dev/gvisor/pkg/sentry/fsimpl/sys"
+ tmpfsvfs2 "gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs"
"gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/syserror"
@@ -44,23 +50,15 @@ import (
)
const (
- // Filesystem name for 9p gofer mounts.
- rootFsName = "9p"
-
// Device name for root mount.
rootDevice = "9pfs-/"
// MountPrefix is the annotation prefix for mount hints.
MountPrefix = "dev.gvisor.spec.mount."
- // Filesystems that runsc supports.
- bind = "bind"
- devpts = "devpts"
- devtmpfs = "devtmpfs"
- proc = "proc"
- sysfs = "sysfs"
- tmpfs = "tmpfs"
- nonefs = "none"
+ // Supported filesystems that map to different internal filesystem.
+ bind = "bind"
+ nonefs = "none"
)
// tmpfs has some extra supported options that we must pass through.
@@ -108,12 +106,12 @@ func compileMounts(spec *specs.Spec) []specs.Mount {
// Always mount /dev.
mounts = append(mounts, specs.Mount{
- Type: devtmpfs,
+ Type: devtmpfs.Name,
Destination: "/dev",
})
mounts = append(mounts, specs.Mount{
- Type: devpts,
+ Type: devpts.Name,
Destination: "/dev/pts",
})
@@ -137,13 +135,13 @@ func compileMounts(spec *specs.Spec) []specs.Mount {
var mandatoryMounts []specs.Mount
if !procMounted {
mandatoryMounts = append(mandatoryMounts, specs.Mount{
- Type: proc,
+ Type: procvfs2.Name,
Destination: "/proc",
})
}
if !sysMounted {
mandatoryMounts = append(mandatoryMounts, specs.Mount{
- Type: sysfs,
+ Type: sysvfs2.Name,
Destination: "/sys",
})
}
@@ -156,12 +154,16 @@ func compileMounts(spec *specs.Spec) []specs.Mount {
}
// p9MountOptions creates a slice of options for a p9 mount.
-func p9MountOptions(fd int, fa FileAccessType) []string {
+func p9MountOptions(fd int, fa FileAccessType, vfs2 bool) []string {
opts := []string{
"trans=fd",
"rfdno=" + strconv.Itoa(fd),
"wfdno=" + strconv.Itoa(fd),
- "privateunixsocket=true",
+ }
+ if !vfs2 {
+ // privateunixsocket is always enabled in VFS2. VFS1 requires explicit
+ // enablement.
+ opts = append(opts, "privateunixsocket=true")
}
if fa == FileAccessShared {
opts = append(opts, "cache=remote_revalidating")
@@ -234,7 +236,7 @@ func isSupportedMountFlag(fstype, opt string) bool {
case "rw", "ro", "noatime", "noexec":
return true
}
- if fstype == tmpfs {
+ if fstype == tmpfsvfs2.Name {
ok, err := parseMountOption(opt, tmpfsAllowedOptions...)
return ok && err == nil
}
@@ -444,7 +446,7 @@ func (m *mountHint) setOptions(val string) error {
}
func (m *mountHint) isSupported() bool {
- return m.mount.Type == tmpfs && m.share == pod
+ return m.mount.Type == tmpfsvfs2.Name && m.share == pod
}
// checkCompatible verifies that shared mount is compatible with master.
@@ -586,7 +588,7 @@ func (c *containerMounter) processHints(conf *Config) error {
for _, hint := range c.hints.mounts {
// TODO(b/142076984): Only support tmpfs for now. Bind mounts require a
// common gofer to mount all shared volumes.
- if hint.mount.Type != tmpfs {
+ if hint.mount.Type != tmpfsvfs2.Name {
continue
}
log.Infof("Mounting master of shared mount %q from %q type %q", hint.name, hint.mount.Source, hint.mount.Type)
@@ -723,7 +725,7 @@ func (c *containerMounter) createRootMount(ctx context.Context, conf *Config) (*
fd := c.fds.remove()
log.Infof("Mounting root over 9P, ioFD: %d", fd)
p9FS := mustFindFilesystem("9p")
- opts := p9MountOptions(fd, conf.FileAccess)
+ opts := p9MountOptions(fd, conf.FileAccess, false /* vfs2 */)
if conf.OverlayfsStaleRead {
// We can't check for overlayfs here because sandbox is chroot'ed and gofer
@@ -768,22 +770,16 @@ func (c *containerMounter) getMountNameAndOptions(conf *Config, m specs.Mount) (
useOverlay bool
)
- for _, opt := range m.Options {
- // When options include either "bind" or "rbind", this behaves as
- // bind mount even if the mount type is equal to a filesystem supported
- // on runsc.
- if opt == "bind" || opt == "rbind" {
- m.Type = bind
- break
- }
+ if isBindMount(m) {
+ m.Type = bind
}
switch m.Type {
- case devpts, devtmpfs, proc, sysfs:
+ case devpts.Name, devtmpfs.Name, procvfs2.Name, sysvfs2.Name:
fsName = m.Type
case nonefs:
- fsName = sysfs
- case tmpfs:
+ fsName = sysvfs2.Name
+ case tmpfsvfs2.Name:
fsName = m.Type
var err error
@@ -794,8 +790,8 @@ func (c *containerMounter) getMountNameAndOptions(conf *Config, m specs.Mount) (
case bind:
fd := c.fds.remove()
- fsName = "9p"
- opts = p9MountOptions(fd, c.getMountAccessType(m))
+ fsName = gofervfs2.Name
+ opts = p9MountOptions(fd, c.getMountAccessType(m), conf.VFS2)
// If configured, add overlay to all writable mounts.
useOverlay = conf.Overlay && !mountFlags(m.Options).ReadOnly
@@ -805,6 +801,18 @@ func (c *containerMounter) getMountNameAndOptions(conf *Config, m specs.Mount) (
return fsName, opts, useOverlay, nil
}
+func isBindMount(m specs.Mount) bool {
+ for _, opt := range m.Options {
+ // When options include either "bind" or "rbind", this behaves as
+ // bind mount even if the mount type is equal to a filesystem supported
+ // on runsc.
+ if opt == "bind" || opt == "rbind" {
+ return true
+ }
+ }
+ return false
+}
+
func (c *containerMounter) getMountAccessType(mount specs.Mount) FileAccessType {
if hint := c.hints.findMount(mount); hint != nil {
return hint.fileAccessType()
@@ -948,7 +956,7 @@ func (c *containerMounter) createRestoreEnvironment(conf *Config) (*fs.RestoreEn
// Add root mount.
fd := c.fds.remove()
- opts := p9MountOptions(fd, conf.FileAccess)
+ opts := p9MountOptions(fd, conf.FileAccess, false /* vfs2 */)
mf := fs.MountSourceFlags{}
if c.root.Readonly || conf.Overlay {
@@ -960,7 +968,7 @@ func (c *containerMounter) createRestoreEnvironment(conf *Config) (*fs.RestoreEn
Flags: mf,
DataString: strings.Join(opts, ","),
}
- renv.MountSources[rootFsName] = append(renv.MountSources[rootFsName], rootMount)
+ renv.MountSources[gofervfs2.Name] = append(renv.MountSources[gofervfs2.Name], rootMount)
// Add submounts.
var tmpMounted bool
@@ -976,7 +984,7 @@ func (c *containerMounter) createRestoreEnvironment(conf *Config) (*fs.RestoreEn
// TODO(b/67958150): handle '/tmp' properly (see mountTmp()).
if !tmpMounted {
tmpMount := specs.Mount{
- Type: tmpfs,
+ Type: tmpfsvfs2.Name,
Destination: "/tmp",
}
if err := c.addRestoreMount(conf, renv, tmpMount); err != nil {
@@ -1032,7 +1040,7 @@ func (c *containerMounter) mountTmp(ctx context.Context, conf *Config, mns *fs.M
// No '/tmp' found (or fallthrough from above). Safe to mount internal
// tmpfs.
tmpMount := specs.Mount{
- Type: tmpfs,
+ Type: tmpfsvfs2.Name,
Destination: "/tmp",
// Sticky bit is added to prevent accidental deletion of files from
// another user. This is normally done for /tmp.
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 05:33:55 +0000