@@ -216,15 +216,23 @@ int xc_tmem_save(xc_interface *xch,
int dom, int io_fd, int live, int field_marker)
{
int marker = field_marker;
- int i, j;
+ int i, j, rc;
uint32_t flags;
uint32_t minusone = -1;
uint32_t pool_id;
struct tmem_handle *h;
xen_tmem_client_t info;
- if ( xc_tmem_control(xch,0,XEN_SYSCTL_TMEM_OP_SAVE_BEGIN,dom,live,0,NULL) <= 0 )
- return 0;
+ rc = xc_tmem_control(xch, 0, XEN_SYSCTL_TMEM_OP_SAVE_BEGIN,
+ dom, live, 0, NULL);
+ if ( rc )
+ {
+ /* Nothing to save - no tmem enabled. */
+ if ( errno == ENOENT )
+ return 0;
+
+ return rc;
+ }
if ( write_exact(io_fd, &marker, sizeof(marker)) )
return -1;
@@ -1656,30 +1656,31 @@ static int tmemc_save_subop(int cli_id, uint32_t pool_id,
struct client *client = tmem_client_from_cli_id(cli_id);
uint32_t p;
struct tmem_page_descriptor *pgp, *pgp2;
- int rc = -1;
+ int rc = -ENOENT;
switch(subop)
{
case XEN_SYSCTL_TMEM_OP_SAVE_BEGIN:
if ( client == NULL )
- return 0;
+ break;
for (p = 0; p < MAX_POOLS_PER_DOMAIN; p++)
if ( client->pools[p] != NULL )
break;
+
if ( p == MAX_POOLS_PER_DOMAIN )
- {
- rc = 0;
break;
- }
+
client->was_frozen = client->info.flags.u.frozen;
client->info.flags.u.frozen = 1;
if ( arg1 != 0 )
client->info.flags.u.migrating = 1;
- rc = 1;
+ rc = 0;
break;
case XEN_SYSCTL_TMEM_OP_RESTORE_BEGIN:
- if ( client == NULL && (client = client_create(cli_id)) != NULL )
- return 1;
+ if ( client == NULL )
+ rc = client_create(cli_id) ? 0 : -ENOMEM;
+ else
+ rc = -EEXIST;
break;
case XEN_SYSCTL_TMEM_OP_SAVE_END:
if ( client == NULL )