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clean up syncs

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Always unblock parent when child setup fails, rather than just
exiting.

Also remove a duplicate call to setup_cgroup().  We'll want it
close to there for userns, but not right there - that's too late,
and could happen after container init has done something bad
without cgroup restrictions.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
This commit is contained in:
Serge Hallyn 2013-01-14 23:32:43 +00:00 committed by Stéphane Graber
parent 8538f38806
commit c4ea60dff6
1 changed files with 3 additions and 9 deletions
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12
src/lxc/start.c
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@ -585,7 +585,7 @@ static int do_start(void *data)
if (handler->conf->need_utmp_watch) {
if (prctl(PR_CAPBSET_DROP, CAP_SYS_BOOT, 0, 0, 0)) {
SYSERROR("failed to remove CAP_SYS_BOOT capability");
return -1;
goto out_warn_father;
}
DEBUG("Dropped cap_sys_boot\n");
}
@ -620,15 +620,14 @@ static int do_start(void *data)
if (putenv("container=lxc")) {
SYSERROR("failed to set environment variable");
return -1;
goto out_warn_father;
}
close(handler->sigfd);
/* after this call, we are in error because this
* ops should not return as it execs */
if (handler->ops->start(handler, handler->data))
return -1;
handler->ops->start(handler, handler->data);
out_warn_father:
lxc_sync_wake_parent(handler, LXC_SYNC_POST_CONFIGURE);
@ -751,11 +750,6 @@ int lxc_spawn(struct lxc_handler *handler)
if (detect_shared_rootfs())
umount2(handler->conf->rootfs.mount, MNT_DETACH);
if (setup_cgroup(name, &handler->conf->cgroup)) {
ERROR("failed to setup the cgroups for '%s'", name);
goto out_delete_net;
}
if (handler->ops->post_start(handler, handler->data))
goto out_abort;