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Remove sub-mounts under /dev when starting an LXC container

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Since we are mounting a new /dev in the container, we must
remove any sub-mounts like /dev/shm, /dev/mqueue, etc,
otherwise they'll be recorded in /proc/mounts, but not be
accessible to applications.
This commit is contained in:
Daniel P. Berrange 2012-06-29 16:29:33 +01:00
parent 0ac3baee2c
commit 5bb83236c9
1 changed files with 4 additions and 3 deletions
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7
src/lxc/lxc_container.c
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@ -1416,10 +1416,11 @@ static int lxcContainerSetupPivotRoot(virDomainDefPtr vmDef,
if (lxcContainerPivotRoot(root) < 0) if (lxcContainerPivotRoot(root) < 0)
goto cleanup; goto cleanup;
/* Gets rid of any existing stuff under /proc, since we need new /* Gets rid of any existing stuff under /proc, /sys & /tmp
* namespace aware versions of those. We must do /proc second * We need new namespace aware versions of those. We must
* otherwise we won't find /proc/mounts :-) */ * do /proc last otherwise we won't find /proc/mounts :-) */
if (lxcContainerUnmountSubtree("/sys", false) < 0 || if (lxcContainerUnmountSubtree("/sys", false) < 0 ||
lxcContainerUnmountSubtree("/dev", false) < 0 ||
lxcContainerUnmountSubtree("/proc", false) < 0) lxcContainerUnmountSubtree("/proc", false) < 0)
goto cleanup; goto cleanup;