While we cannot yet disentangle the multifd packet from page data, we can make the code a bit cleaner by setting the page-related fields in a separate function.
Signed-off-by: Fabiano Rosas <faro...@suse.de> --- migration/multifd.c | 97 ++++++++++++++++++++++++++++----------------- 1 file changed, 61 insertions(+), 36 deletions(-) diff --git a/migration/multifd.c b/migration/multifd.c index fcdb12e04f..d25b8658b2 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -409,65 +409,62 @@ static int multifd_recv_initial_packet(QIOChannel *c, Error **errp) return msg.id; } -void multifd_send_fill_packet(MultiFDSendParams *p) +static void multifd_ram_fill_packet(MultiFDSendParams *p) { MultiFDPacket_t *packet = p->packet; MultiFDPages_t *pages = &p->data->u.ram; - uint64_t packet_num; uint32_t zero_num = pages->num - pages->normal_num; - int i; - packet->flags = cpu_to_be32(p->flags); packet->pages_alloc = cpu_to_be32(pages->allocated); packet->normal_pages = cpu_to_be32(pages->normal_num); packet->zero_pages = cpu_to_be32(zero_num); - packet->next_packet_size = cpu_to_be32(p->next_packet_size); - - packet_num = qatomic_fetch_inc(&multifd_send_state->packet_num); - packet->packet_num = cpu_to_be64(packet_num); if (pages->block) { strncpy(packet->ramblock, pages->block->idstr, 256); } - for (i = 0; i < pages->num; i++) { + for (int i = 0; i < pages->num; i++) { /* there are architectures where ram_addr_t is 32 bit */ uint64_t temp = pages->offset[i]; packet->offset[i] = cpu_to_be64(temp); } - p->packets_sent++; p->total_normal_pages += pages->normal_num; p->total_zero_pages += zero_num; +} - trace_multifd_send(p->id, packet_num, pages->normal_num, zero_num, +void multifd_send_fill_packet(MultiFDSendParams *p) +{ + MultiFDPacket_t *packet = p->packet; + uint64_t packet_num; + + memset(packet, 0, p->packet_len); + + packet->magic = cpu_to_be32(MULTIFD_MAGIC); + packet->version = cpu_to_be32(MULTIFD_VERSION); + + packet->flags = cpu_to_be32(p->flags); + packet->next_packet_size = cpu_to_be32(p->next_packet_size); + + packet_num = qatomic_fetch_inc(&multifd_send_state->packet_num); + packet->packet_num = cpu_to_be64(packet_num); + + p->packets_sent++; + + multifd_ram_fill_packet(p); + + trace_multifd_send(p->id, packet_num, + be32_to_cpu(packet->normal_pages), + be32_to_cpu(packet->zero_pages), p->flags, p->next_packet_size); } -static int multifd_recv_unfill_packet(MultiFDRecvParams *p, Error **errp) +static int multifd_ram_unfill_packet(MultiFDRecvParams *p, Error **errp) { MultiFDPacket_t *packet = p->packet; int i; - packet->magic = be32_to_cpu(packet->magic); - if (packet->magic != MULTIFD_MAGIC) { - error_setg(errp, "multifd: received packet " - "magic %x and expected magic %x", - packet->magic, MULTIFD_MAGIC); - return -1; - } - - packet->version = be32_to_cpu(packet->version); - if (packet->version != MULTIFD_VERSION) { - error_setg(errp, "multifd: received packet " - "version %u and expected version %u", - packet->version, MULTIFD_VERSION); - return -1; - } - - p->flags = be32_to_cpu(packet->flags); - packet->pages_alloc = be32_to_cpu(packet->pages_alloc); /* * If we received a packet that is 100 times bigger than expected @@ -496,15 +493,9 @@ static int multifd_recv_unfill_packet(MultiFDRecvParams *p, Error **errp) return -1; } - p->next_packet_size = be32_to_cpu(packet->next_packet_size); - p->packet_num = be64_to_cpu(packet->packet_num); - p->packets_recved++; p->total_normal_pages += p->normal_num; p->total_zero_pages += p->zero_num; - trace_multifd_recv(p->id, p->packet_num, p->normal_num, p->zero_num, - p->flags, p->next_packet_size); - if (p->normal_num == 0 && p->zero_num == 0) { return 0; } @@ -546,6 +537,40 @@ static int multifd_recv_unfill_packet(MultiFDRecvParams *p, Error **errp) return 0; } +static int multifd_recv_unfill_packet(MultiFDRecvParams *p, Error **errp) +{ + MultiFDPacket_t *packet = p->packet; + int ret = 0; + + packet->magic = be32_to_cpu(packet->magic); + if (packet->magic != MULTIFD_MAGIC) { + error_setg(errp, "multifd: received packet " + "magic %x and expected magic %x", + packet->magic, MULTIFD_MAGIC); + return -1; + } + + packet->version = be32_to_cpu(packet->version); + if (packet->version != MULTIFD_VERSION) { + error_setg(errp, "multifd: received packet " + "version %u and expected version %u", + packet->version, MULTIFD_VERSION); + return -1; + } + + p->flags = be32_to_cpu(packet->flags); + p->next_packet_size = be32_to_cpu(packet->next_packet_size); + p->packet_num = be64_to_cpu(packet->packet_num); + p->packets_recved++; + + ret = multifd_ram_unfill_packet(p, errp); + + trace_multifd_recv(p->id, p->packet_num, p->normal_num, p->zero_num, + p->flags, p->next_packet_size); + + return ret; +} + static bool multifd_send_should_exit(void) { return qatomic_read(&multifd_send_state->exiting); -- 2.35.3