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authorMarc-André Lureau <marcandre.lureau@redhat.com>2018-08-30 16:33:48 +0200
committerEduardo Otubo <otubo@redhat.com>2018-09-26 15:07:35 +0200
commit5780760f5ea6163939a5dabe7427318b4f07d1a2 (patch)
tree4977ed2945bec3e1bc0e8ee70ab79147ae5e4697 /qemu-seccomp.c
parent19b599f7664b2ebfd0f405fb79c14dd241557452 (diff)
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seccomp: check TSYNC host capability
Remove -sandbox option if the host is not capable of TSYNC, since the sandbox will fail at setup time otherwise. This will help libvirt, for ex, to figure out if -sandbox will work. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Eduardo Otubo <otubo@redhat.com> Acked-by: Eduardo Otubo <otubo@redhat.com>
Diffstat (limited to 'qemu-seccomp.c')
-rw-r--r--qemu-seccomp.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/qemu-seccomp.c b/qemu-seccomp.c
index 4729eb1..1baa5c6 100644
--- a/qemu-seccomp.c
+++ b/qemu-seccomp.c
@@ -282,7 +282,24 @@ static QemuOptsList qemu_sandbox_opts = {
static void seccomp_register(void)
{
- qemu_add_opts(&qemu_sandbox_opts);
+ bool add = false;
+
+ /* FIXME: use seccomp_api_get() >= 2 check when released */
+
+#if defined(SECCOMP_FILTER_FLAG_TSYNC)
+ int check;
+
+ /* check host TSYNC capability, it returns errno == ENOSYS if unavailable */
+ check = qemu_seccomp(SECCOMP_SET_MODE_FILTER,
+ SECCOMP_FILTER_FLAG_TSYNC, NULL);
+ if (check < 0 && errno == EFAULT) {
+ add = true;
+ }
+#endif
+
+ if (add) {
+ qemu_add_opts(&qemu_sandbox_opts);
+ }
}
opts_init(seccomp_register);
#endif