#include <ctype.h>
#include <sys/resource.h>
#include <fcntl.h>
+#define _GNU_SOURCE
+#include <sched.h>
#include "vserver.h"
#include "planetlab.h"
#endif
static int
-create_context(xid_t ctx, uint64_t bcaps)
+create_context(xid_t ctx, uint64_t bcaps, uint32_t unshare_flags)
{
struct vc_ctx_caps vc_caps;
struct vc_net_flags vc_nf;
return -1;
process:
+
/*
* Create context info - this sets the STATE_SETUP and STATE_INIT flags.
*/
if (vc_ctx_create(ctx, 0) == VC_NOCTX)
return -1;
+ if (unshare_flags != 0) {
+ unshare(unshare_flags);
+ unshare_flags |= vc_get_space_mask();
+ //printf("vc_set_namespace(%d, %X)\n", ctx, unshare_flags);
+ //vc_set_namespace(ctx, unshare_flags);
+ }
+
/* Set capabilities - these don't take effect until SETUP flag is unset */
vc_caps.bcaps = bcaps;
vc_caps.bmask = ~0ULL; /* currently unused */
#define RETRY_LIMIT 10
int
-pl_chcontext(xid_t ctx, uint64_t bcaps, const struct sliver_resources *slr)
+pl_chcontext(xid_t ctx, uint64_t bcaps, const struct sliver_resources *slr,
+ int unshare_netns)
{
int retry_count = 0;
int net_migrated = 0;
-
+
if (pl_set_ulimits(slr) != 0)
return -1;
if (vc_get_cflags(ctx, &vc_flags))
{
+ uint32_t unshare_flags;
if (errno != ESRCH)
return -1;
+ /* Always unshare the net namespace for a new context */
+ unshare_flags = CLONE_NEWNET;
+
/* context doesn't exist - create it */
- if (create_context(ctx, bcaps))
+ if (create_context(ctx, bcaps, unshare_flags))
{
if (errno == EEXIST)
/* another process beat us in a race */
migrate:
if (net_migrated || !vc_net_migrate(ctx))
{
+ uint32_t unshare_flags;
+
+ /* Unshare the net namespace if requested in the slice config */
+ unshare_flags = unshare_netns ? CLONE_NEWNET : 0;
+
+ if (unshare_flags != 0) {
+ unshare_flags |=vc_get_space_mask();
+ //printf("vc_enter_namespace(%d, %X)\n", ctx, unshare_flags);
+ //vc_enter_namespace(ctx, unshare_flags);
+ }
+
if (!vc_tag_migrate(ctx) && !vc_ctx_migrate(ctx, 0))
break; /* done */
net_migrated = 1;
if (index < len) index++; else goto out;
#define VSERVERCONF "/etc/vservers/"
+
void
pl_get_limits(const char *context, struct sliver_resources *slr)
{