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X-Received-From: 32.97.182.137 Cc: Kevin Wolf , Lucas Meneghel Rodrigues , Anthony Liguori , Stefan Hajnoczi , Juan Quintela , Avi Kivity Subject: [Qemu-devel] [PATCH 2/7] ivshmem: use migration blockers to prevent live migration in peer mode X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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 --- hw/ivshmem.c | 12 +++++++++++- qerror.c | 4 ++++ qerror.h | 3 +++ 3 files changed, 18 insertions(+), 1 deletions(-) diff --git a/hw/ivshmem.c b/hw/ivshmem.c index 242fbea..a3a0e98 100644 --- a/hw/ivshmem.c +++ b/hw/ivshmem.c @@ -18,6 +18,8 @@ #include "pci.h" #include "msix.h" #include "kvm.h" +#include "migration.h" +#include "qerror.h" #include #include @@ -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); diff --git a/qerror.c b/qerror.c index 4b48b39..8e30e2d 100644 --- a/qerror.c +++ b/qerror.c @@ -73,6 +73,10 @@ static const QErrorStringTable qerror_table[] = { .desc = "Device '%(device)' is in use", }, { + .error_fmt = QERR_DEVICE_FEATURE_BLOCKS_MIGRATION, + .desc = "Migration is disabled when using feature '%(feature)' in device '%(device)'", + }, + { .error_fmt = QERR_DEVICE_LOCKED, .desc = "Device '%(device)' is locked", }, diff --git a/qerror.h b/qerror.h index d4bfcfd..7e2eebf 100644 --- a/qerror.h +++ b/qerror.h @@ -72,6 +72,9 @@ QError *qobject_to_qerror(const QObject *obj); #define QERR_DEVICE_IN_USE \ "{ 'class': 'DeviceInUse', 'data': { 'device': %s } }" +#define QERR_DEVICE_FEATURE_BLOCKS_MIGRATION \ + "{ 'class': 'DeviceFeatureBlocksMigration', 'data': { 'device': %s, 'feature': %s } }" + #define QERR_DEVICE_LOCKED \ "{ 'class': 'DeviceLocked', 'data': { 'device': %s } }"