diff options
| -rw-r--r-- | migration/savevm.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/migration/savevm.c b/migration/savevm.c index b024ee3b22..f202c3de3a 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -1376,7 +1376,8 @@ static int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis); * *might* happen - it might be skipped if precopy transferred everything * quickly. */ -static int loadvm_postcopy_handle_advise(MigrationIncomingState *mis) +static int loadvm_postcopy_handle_advise(MigrationIncomingState *mis, + uint16_t len) { PostcopyState ps = postcopy_state_set(POSTCOPY_INCOMING_ADVISE); uint64_t remote_pagesize_summary, local_pagesize_summary, remote_tps; @@ -1387,8 +1388,22 @@ static int loadvm_postcopy_handle_advise(MigrationIncomingState *mis) return -1; } - if (!migrate_postcopy_ram()) { + switch (len) { + case 0: + if (migrate_postcopy_ram()) { + error_report("RAM postcopy is enabled but have 0 byte advise"); + return -EINVAL; + } return 0; + case 8 + 8: + if (!migrate_postcopy_ram()) { + error_report("RAM postcopy is disabled but have 16 byte advise"); + return -EINVAL; + } + break; + default: + error_report("CMD_POSTCOPY_ADVISE invalid length (%d)", len); + return -EINVAL; } if (!postcopy_ram_supported_by_host(mis)) { @@ -1807,7 +1822,7 @@ static int loadvm_process_command(QEMUFile *f) return loadvm_handle_cmd_packaged(mis); case MIG_CMD_POSTCOPY_ADVISE: - return loadvm_postcopy_handle_advise(mis); + return loadvm_postcopy_handle_advise(mis, len); case MIG_CMD_POSTCOPY_LISTEN: return loadvm_postcopy_handle_listen(mis); |