diff options
Diffstat (limited to 'runsc')
| -rw-r--r-- | runsc/boot/config.go | 6 | ||||
| -rw-r--r-- | runsc/main.go | 2 |
2 files changed, 5 insertions, 3 deletions
diff --git a/runsc/boot/config.go b/runsc/boot/config.go index 6d6a705f8..bcec7e4db 100644 --- a/runsc/boot/config.go +++ b/runsc/boot/config.go @@ -241,8 +241,10 @@ type Config struct { // ReferenceLeakMode sets reference leak check mode ReferenceLeakMode refs.LeakMode - // OverlayfsStaleRead causes cached FDs to reopen after a file is opened for - // write to workaround overlayfs limitation on kernels before 4.19. + // OverlayfsStaleRead instructs the sandbox to assume that the root mount + // is on a Linux overlayfs mount, which does not necessarily preserve + // coherence between read-only and subsequent writable file descriptors + // representing the "same" file. OverlayfsStaleRead bool // TestOnlyAllowRunAsCurrentUserWithoutChroot should only be used in diff --git a/runsc/main.go b/runsc/main.go index 0625a06e0..920ed84a5 100644 --- a/runsc/main.go +++ b/runsc/main.go @@ -76,7 +76,7 @@ var ( fileAccess = flag.String("file-access", "exclusive", "specifies which filesystem to use for the root mount: exclusive (default), shared. Volume mounts are always shared.") fsGoferHostUDS = flag.Bool("fsgofer-host-uds", false, "allow the gofer to mount Unix Domain Sockets.") overlay = flag.Bool("overlay", false, "wrap filesystem mounts with writable overlay. All modifications are stored in memory inside the sandbox.") - overlayfsStaleRead = flag.Bool("overlayfs-stale-read", false, "reopen cached FDs after a file is opened for write to workaround overlayfs limitation on kernels before 4.19.") + overlayfsStaleRead = flag.Bool("overlayfs-stale-read", true, "assume root mount is an overlay filesystem") watchdogAction = flag.String("watchdog-action", "log", "sets what action the watchdog takes when triggered: log (default), panic.") panicSignal = flag.Int("panic-signal", -1, "register signal handling that panics. Usually set to SIGUSR2(12) to troubleshoot hangs. -1 disables it.") profile = flag.Bool("profile", false, "prepares the sandbox to use Golang profiler. Note that enabling profiler loosens the seccomp protection added to the sandbox (DO NOT USE IN PRODUCTION).") |