diff options
| -rw-r--r-- | migration/savevm.c | 61 | ||||
| -rw-r--r-- | migration/savevm.h | 1 | ||||
| -rw-r--r-- | migration/trace-events | 2 |
3 files changed, 64 insertions, 0 deletions
diff --git a/migration/savevm.c b/migration/savevm.c index 6ee69d8283..9f4a95d411 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -81,6 +81,7 @@ enum qemu_vm_cmd { were previously sent during precopy but are dirty. */ MIG_CMD_PACKAGED, /* Send a wrapped stream within this stream */ + MIG_CMD_RECV_BITMAP, /* Request for recved bitmap on dst */ MIG_CMD_MAX }; @@ -98,6 +99,7 @@ static struct mig_cmd_args { [MIG_CMD_POSTCOPY_RAM_DISCARD] = { .len = -1, .name = "POSTCOPY_RAM_DISCARD" }, [MIG_CMD_PACKAGED] = { .len = 4, .name = "PACKAGED" }, + [MIG_CMD_RECV_BITMAP] = { .len = -1, .name = "RECV_BITMAP" }, [MIG_CMD_MAX] = { .len = -1, .name = "MAX" }, }; @@ -956,6 +958,19 @@ void qemu_savevm_send_postcopy_run(QEMUFile *f) qemu_savevm_command_send(f, MIG_CMD_POSTCOPY_RUN, 0, NULL); } +void qemu_savevm_send_recv_bitmap(QEMUFile *f, char *block_name) +{ + size_t len; + char buf[256]; + + trace_savevm_send_recv_bitmap(block_name); + + buf[0] = len = strlen(block_name); + memcpy(buf + 1, block_name, len); + + qemu_savevm_command_send(f, MIG_CMD_RECV_BITMAP, len + 1, (uint8_t *)buf); +} + bool qemu_savevm_state_blocked(Error **errp) { SaveStateEntry *se; @@ -1802,6 +1817,49 @@ static int loadvm_handle_cmd_packaged(MigrationIncomingState *mis) } /* + * Handle request that source requests for recved_bitmap on + * destination. Payload format: + * + * len (1 byte) + ramblock_name (<255 bytes) + */ +static int loadvm_handle_recv_bitmap(MigrationIncomingState *mis, + uint16_t len) +{ + QEMUFile *file = mis->from_src_file; + RAMBlock *rb; + char block_name[256]; + size_t cnt; + + cnt = qemu_get_counted_string(file, block_name); + if (!cnt) { + error_report("%s: failed to read block name", __func__); + return -EINVAL; + } + + /* Validate before using the data */ + if (qemu_file_get_error(file)) { + return qemu_file_get_error(file); + } + + if (len != cnt + 1) { + error_report("%s: invalid payload length (%d)", __func__, len); + return -EINVAL; + } + + rb = qemu_ram_block_by_name(block_name); + if (!rb) { + error_report("%s: block '%s' not found", __func__, block_name); + return -EINVAL; + } + + /* TODO: send the bitmap back to source */ + + trace_loadvm_handle_recv_bitmap(block_name); + + return 0; +} + +/* * Process an incoming 'QEMU_VM_COMMAND' * 0 just a normal return * LOADVM_QUIT All good, but exit the loop @@ -1874,6 +1932,9 @@ static int loadvm_process_command(QEMUFile *f) case MIG_CMD_POSTCOPY_RAM_DISCARD: return loadvm_postcopy_ram_handle_discard(mis, len); + + case MIG_CMD_RECV_BITMAP: + return loadvm_handle_recv_bitmap(mis, len); } return 0; diff --git a/migration/savevm.h b/migration/savevm.h index cf4f0d37ca..b8cee00d41 100644 --- a/migration/savevm.h +++ b/migration/savevm.h @@ -47,6 +47,7 @@ int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len); void qemu_savevm_send_postcopy_advise(QEMUFile *f); void qemu_savevm_send_postcopy_listen(QEMUFile *f); void qemu_savevm_send_postcopy_run(QEMUFile *f); +void qemu_savevm_send_recv_bitmap(QEMUFile *f, char *block_name); void qemu_savevm_send_postcopy_ram_discard(QEMUFile *f, const char *name, uint16_t len, diff --git a/migration/trace-events b/migration/trace-events index 7f836499d1..5bee6d525a 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -12,6 +12,7 @@ loadvm_state_cleanup(void) "" loadvm_handle_cmd_packaged(unsigned int length) "%u" loadvm_handle_cmd_packaged_main(int ret) "%d" loadvm_handle_cmd_packaged_received(int ret) "%d" +loadvm_handle_recv_bitmap(char *s) "%s" loadvm_postcopy_handle_advise(void) "" loadvm_postcopy_handle_listen(void) "" loadvm_postcopy_handle_run(void) "" @@ -34,6 +35,7 @@ savevm_send_open_return_path(void) "" savevm_send_ping(uint32_t val) "0x%x" savevm_send_postcopy_listen(void) "" savevm_send_postcopy_run(void) "" +savevm_send_recv_bitmap(char *name) "%s" savevm_state_setup(void) "" savevm_state_header(void) "" savevm_state_iterate(void) "" |