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ivshmem: use migration blockers to prevent live migration in peer mode (v2)

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Now when you try to migrate with ivshmem, you get a proper QMP error:

(qemu) migrate tcp:localhost:1025
Migration is disabled when using feature 'peer mode' in device 'ivshmem'
(qemu)

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2011-11-14 15:09:44 -06:00
parent fa2756b71b
commit 38e0735eb7
4 changed files with 18 additions and 26 deletions
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12
hw/ivshmem.c
View file

@ -18,6 +18,8 @@
#include "pci.h"
#include "msix.h"
#include "kvm.h"
#include "migration.h"
#include "qerror.h"
#include <sys/mman.h>
#include <sys/types.h>
@ -78,6 +80,8 @@ typedef struct IVShmemState {
uint32_t features;
EventfdEntry *eventfd_table;
Error *migration_blocker;
char * shmobj;
char * sizearg;
char * role;
@ -646,7 +650,8 @@ static int pci_ivshmem_init(PCIDevice *dev)
}
if (s->role_val == IVSHMEM_PEER) {
register_device_unmigratable(&s->dev.qdev, "ivshmem", s);
error_set(&s->migration_blocker, QERR_DEVICE_FEATURE_BLOCKS_MIGRATION, "ivshmem", "peer mode");
migrate_add_blocker(s->migration_blocker);
}
pci_conf = s->dev.config;
@ -741,6 +746,11 @@ static int pci_ivshmem_uninit(PCIDevice *dev)
{
IVShmemState *s = DO_UPCAST(IVShmemState, dev, dev);
if (s->migration_blocker) {
migrate_del_blocker(s->migration_blocker);
error_free(s->migration_blocker);
}
memory_region_destroy(&s->ivshmem_mmio);
memory_region_del_subregion(&s->bar, &s->ivshmem);
memory_region_destroy(&s->ivshmem);