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@@ -1,1274 +0,0 @@
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-/*
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- * Multifd common code
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- *
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- * Copyright (c) 2019-2020 Red Hat Inc
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- *
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- * Authors:
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- * Juan Quintela <quintela@redhat.com>
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- *
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- * This work is licensed under the terms of the GNU GPL, version 2 or later.
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- * See the COPYING file in the top-level directory.
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- */
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-
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-#include "qemu/osdep.h"
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-#include "qemu/rcu.h"
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-#include "exec/target_page.h"
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-#include "sysemu/sysemu.h"
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-#include "exec/ramblock.h"
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-#include "qemu/error-report.h"
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-#include "qapi/error.h"
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-#include "ram.h"
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-#include "migration.h"
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-#include "socket.h"
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-#include "tls.h"
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-#include "qemu-file.h"
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-#include "trace.h"
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-#include "multifd.h"
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-
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-#include "qemu/yank.h"
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-#include "io/channel-socket.h"
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-#include "yank_functions.h"
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-
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-/* Multiple fd's */
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-
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-#define MULTIFD_MAGIC 0x11223344U
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-#define MULTIFD_VERSION 1
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-
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-typedef struct {
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- uint32_t magic;
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- uint32_t version;
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- unsigned char uuid[16]; /* QemuUUID */
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- uint8_t id;
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- uint8_t unused1[7]; /* Reserved for future use */
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- uint64_t unused2[4]; /* Reserved for future use */
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-} __attribute__((packed)) MultiFDInit_t;
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-
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-/* Multifd without compression */
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-
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-/**
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- * nocomp_send_setup: setup send side
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- *
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- * For no compression this function does nothing.
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- *
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- * Returns 0 for success or -1 for error
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- *
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- * @p: Params for the channel that we are using
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- * @errp: pointer to an error
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- */
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-static int nocomp_send_setup(MultiFDSendParams *p, Error **errp)
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-{
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- return 0;
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-}
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-
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-/**
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- * nocomp_send_cleanup: cleanup send side
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- *
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- * For no compression this function does nothing.
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- *
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- * @p: Params for the channel that we are using
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- * @errp: pointer to an error
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- */
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-static void nocomp_send_cleanup(MultiFDSendParams *p, Error **errp)
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-{
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- return;
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-}
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-
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-/**
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- * nocomp_send_prepare: prepare date to be able to send
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- *
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- * For no compression we just have to calculate the size of the
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- * packet.
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- *
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- * Returns 0 for success or -1 for error
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- *
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- * @p: Params for the channel that we are using
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- * @errp: pointer to an error
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- */
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-static int nocomp_send_prepare(MultiFDSendParams *p, Error **errp)
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-{
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- MultiFDPages_t *pages = p->pages;
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-
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- for (int i = 0; i < p->normal_num; i++) {
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- p->iov[p->iovs_num].iov_base = pages->block->host + p->normal[i];
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- p->iov[p->iovs_num].iov_len = p->page_size;
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- p->iovs_num++;
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- }
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-
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- p->next_packet_size = p->normal_num * p->page_size;
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- p->flags |= MULTIFD_FLAG_NOCOMP;
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- return 0;
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-}
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-
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-/**
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- * nocomp_recv_setup: setup receive side
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- *
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- * For no compression this function does nothing.
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- *
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- * Returns 0 for success or -1 for error
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- *
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- * @p: Params for the channel that we are using
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- * @errp: pointer to an error
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- */
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-static int nocomp_recv_setup(MultiFDRecvParams *p, Error **errp)
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-{
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- return 0;
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-}
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-
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-/**
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- * nocomp_recv_cleanup: setup receive side
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- *
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- * For no compression this function does nothing.
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- *
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- * @p: Params for the channel that we are using
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- */
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-static void nocomp_recv_cleanup(MultiFDRecvParams *p)
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-{
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-}
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-
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-/**
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- * nocomp_recv_pages: read the data from the channel into actual pages
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- *
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- * For no compression we just need to read things into the correct place.
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- *
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- * Returns 0 for success or -1 for error
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- *
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- * @p: Params for the channel that we are using
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- * @errp: pointer to an error
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- */
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-static int nocomp_recv_pages(MultiFDRecvParams *p, Error **errp)
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-{
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- uint32_t flags = p->flags & MULTIFD_FLAG_COMPRESSION_MASK;
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-
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- if (flags != MULTIFD_FLAG_NOCOMP) {
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- error_setg(errp, "multifd %u: flags received %x flags expected %x",
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- p->id, flags, MULTIFD_FLAG_NOCOMP);
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- return -1;
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- }
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- for (int i = 0; i < p->normal_num; i++) {
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- p->iov[i].iov_base = p->host + p->normal[i];
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- p->iov[i].iov_len = p->page_size;
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- }
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- return qio_channel_readv_all(p->c, p->iov, p->normal_num, errp);
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-}
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-
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-static MultiFDMethods multifd_nocomp_ops = {
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- .send_setup = nocomp_send_setup,
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- .send_cleanup = nocomp_send_cleanup,
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- .send_prepare = nocomp_send_prepare,
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- .recv_setup = nocomp_recv_setup,
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- .recv_cleanup = nocomp_recv_cleanup,
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- .recv_pages = nocomp_recv_pages
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-};
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-
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-static MultiFDMethods *multifd_ops[MULTIFD_COMPRESSION__MAX] = {
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- [MULTIFD_COMPRESSION_NONE] = &multifd_nocomp_ops,
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-};
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-
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-void multifd_register_ops(int method, MultiFDMethods *ops)
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-{
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- assert(0 < method && method < MULTIFD_COMPRESSION__MAX);
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- multifd_ops[method] = ops;
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-}
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-
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-static int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp)
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-{
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- MultiFDInit_t msg = {};
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- int ret;
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-
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- msg.magic = cpu_to_be32(MULTIFD_MAGIC);
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- msg.version = cpu_to_be32(MULTIFD_VERSION);
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- msg.id = p->id;
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- memcpy(msg.uuid, &qemu_uuid.data, sizeof(msg.uuid));
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-
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- ret = qio_channel_write_all(p->c, (char *)&msg, sizeof(msg), errp);
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- if (ret != 0) {
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- return -1;
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- }
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- return 0;
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-}
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-
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-static int multifd_recv_initial_packet(QIOChannel *c, Error **errp)
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-{
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- MultiFDInit_t msg;
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- int ret;
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-
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- ret = qio_channel_read_all(c, (char *)&msg, sizeof(msg), errp);
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- if (ret != 0) {
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- return -1;
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- }
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-
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- msg.magic = be32_to_cpu(msg.magic);
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- msg.version = be32_to_cpu(msg.version);
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-
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- if (msg.magic != MULTIFD_MAGIC) {
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- error_setg(errp, "multifd: received packet magic %x "
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- "expected %x", msg.magic, MULTIFD_MAGIC);
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- return -1;
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- }
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-
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- if (msg.version != MULTIFD_VERSION) {
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- error_setg(errp, "multifd: received packet version %u "
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- "expected %u", msg.version, MULTIFD_VERSION);
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- return -1;
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- }
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-
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- if (memcmp(msg.uuid, &qemu_uuid, sizeof(qemu_uuid))) {
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- char *uuid = qemu_uuid_unparse_strdup(&qemu_uuid);
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- char *msg_uuid = qemu_uuid_unparse_strdup((const QemuUUID *)msg.uuid);
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-
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- error_setg(errp, "multifd: received uuid '%s' and expected "
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- "uuid '%s' for channel %hhd", msg_uuid, uuid, msg.id);
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- g_free(uuid);
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- g_free(msg_uuid);
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- return -1;
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- }
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-
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- if (msg.id > migrate_multifd_channels()) {
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- error_setg(errp, "multifd: received channel version %u "
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- "expected %u", msg.version, MULTIFD_VERSION);
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- return -1;
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- }
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-
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- return msg.id;
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-}
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-
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-static MultiFDPages_t *multifd_pages_init(size_t size)
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-{
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- MultiFDPages_t *pages = g_new0(MultiFDPages_t, 1);
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-
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- pages->allocated = size;
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- pages->offset = g_new0(ram_addr_t, size);
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-
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- return pages;
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-}
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-
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-static void multifd_pages_clear(MultiFDPages_t *pages)
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-{
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- pages->num = 0;
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- pages->allocated = 0;
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- pages->packet_num = 0;
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- pages->block = NULL;
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- g_free(pages->offset);
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- pages->offset = NULL;
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- g_free(pages);
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-}
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-
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-static void multifd_send_fill_packet(MultiFDSendParams *p)
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-{
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- MultiFDPacket_t *packet = p->packet;
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- int i;
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-
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- packet->flags = cpu_to_be32(p->flags);
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- packet->pages_alloc = cpu_to_be32(p->pages->allocated);
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- packet->normal_pages = cpu_to_be32(p->normal_num);
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- packet->next_packet_size = cpu_to_be32(p->next_packet_size);
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- packet->packet_num = cpu_to_be64(p->packet_num);
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-
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- if (p->pages->block) {
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- strncpy(packet->ramblock, p->pages->block->idstr, 256);
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- }
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-
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- for (i = 0; i < p->normal_num; i++) {
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- /* there are architectures where ram_addr_t is 32 bit */
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- uint64_t temp = p->normal[i];
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-
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- packet->offset[i] = cpu_to_be64(temp);
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- }
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-}
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-
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-static int multifd_recv_unfill_packet(MultiFDRecvParams *p, Error **errp)
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-{
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- MultiFDPacket_t *packet = p->packet;
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- RAMBlock *block;
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- int i;
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-
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- packet->magic = be32_to_cpu(packet->magic);
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- if (packet->magic != MULTIFD_MAGIC) {
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- error_setg(errp, "multifd: received packet "
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- "magic %x and expected magic %x",
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- packet->magic, MULTIFD_MAGIC);
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- return -1;
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- }
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-
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- packet->version = be32_to_cpu(packet->version);
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- if (packet->version != MULTIFD_VERSION) {
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- error_setg(errp, "multifd: received packet "
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- "version %u and expected version %u",
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- packet->version, MULTIFD_VERSION);
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- return -1;
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- }
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-
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- p->flags = be32_to_cpu(packet->flags);
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-
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- packet->pages_alloc = be32_to_cpu(packet->pages_alloc);
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- /*
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- * If we received a packet that is 100 times bigger than expected
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- * just stop migration. It is a magic number.
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- */
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- if (packet->pages_alloc > p->page_count) {
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- error_setg(errp, "multifd: received packet "
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- "with size %u and expected a size of %u",
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- packet->pages_alloc, p->page_count) ;
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- return -1;
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- }
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-
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- p->normal_num = be32_to_cpu(packet->normal_pages);
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- if (p->normal_num > packet->pages_alloc) {
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- error_setg(errp, "multifd: received packet "
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- "with %u pages and expected maximum pages are %u",
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- p->normal_num, packet->pages_alloc) ;
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- return -1;
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- }
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-
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- p->next_packet_size = be32_to_cpu(packet->next_packet_size);
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- p->packet_num = be64_to_cpu(packet->packet_num);
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-
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- if (p->normal_num == 0) {
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- return 0;
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- }
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-
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- /* make sure that ramblock is 0 terminated */
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- packet->ramblock[255] = 0;
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- block = qemu_ram_block_by_name(packet->ramblock);
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- if (!block) {
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- error_setg(errp, "multifd: unknown ram block %s",
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- packet->ramblock);
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- return -1;
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- }
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-
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- p->host = block->host;
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- for (i = 0; i < p->normal_num; i++) {
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- uint64_t offset = be64_to_cpu(packet->offset[i]);
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-
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- if (offset > (block->used_length - p->page_size)) {
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- error_setg(errp, "multifd: offset too long %" PRIu64
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- " (max " RAM_ADDR_FMT ")",
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- offset, block->used_length);
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- return -1;
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- }
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- p->normal[i] = offset;
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- }
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-
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- return 0;
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-}
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-
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-struct {
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- MultiFDSendParams *params;
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- /* array of pages to sent */
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- MultiFDPages_t *pages;
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- /* global number of generated multifd packets */
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- uint64_t packet_num;
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- /* send channels ready */
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- QemuSemaphore channels_ready;
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- /*
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- * Have we already run terminate threads. There is a race when it
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- * happens that we got one error while we are exiting.
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- * We will use atomic operations. Only valid values are 0 and 1.
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- */
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- int exiting;
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- /* multifd ops */
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- MultiFDMethods *ops;
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-} *multifd_send_state;
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-
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-/*
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- * How we use multifd_send_state->pages and channel->pages?
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- *
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- * We create a pages for each channel, and a main one. Each time that
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- * we need to send a batch of pages we interchange the ones between
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- * multifd_send_state and the channel that is sending it. There are
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- * two reasons for that:
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- * - to not have to do so many mallocs during migration
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- * - to make easier to know what to free at the end of migration
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- *
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- * This way we always know who is the owner of each "pages" struct,
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- * and we don't need any locking. It belongs to the migration thread
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- * or to the channel thread. Switching is safe because the migration
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- * thread is using the channel mutex when changing it, and the channel
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- * have to had finish with its own, otherwise pending_job can't be
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- * false.
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- */
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-
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-static int multifd_send_pages(QEMUFile *f)
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-{
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- int i;
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- static int next_channel;
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- MultiFDSendParams *p = NULL; /* make happy gcc */
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- MultiFDPages_t *pages = multifd_send_state->pages;
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- uint64_t transferred;
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-
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- if (qatomic_read(&multifd_send_state->exiting)) {
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- return -1;
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- }
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-
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- qemu_sem_wait(&multifd_send_state->channels_ready);
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- /*
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|
|
- * next_channel can remain from a previous migration that was
|
|
|
- * using more channels, so ensure it doesn't overflow if the
|
|
|
- * limit is lower now.
|
|
|
- */
|
|
|
- next_channel %= migrate_multifd_channels();
|
|
|
- for (i = next_channel;; i = (i + 1) % migrate_multifd_channels()) {
|
|
|
- p = &multifd_send_state->params[i];
|
|
|
-
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
- if (p->quit) {
|
|
|
- error_report("%s: channel %d has already quit!", __func__, i);
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- return -1;
|
|
|
- }
|
|
|
- if (!p->pending_job) {
|
|
|
- p->pending_job++;
|
|
|
- next_channel = (i + 1) % migrate_multifd_channels();
|
|
|
- break;
|
|
|
- }
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- }
|
|
|
- assert(!p->pages->num);
|
|
|
- assert(!p->pages->block);
|
|
|
-
|
|
|
- p->packet_num = multifd_send_state->packet_num++;
|
|
|
- multifd_send_state->pages = p->pages;
|
|
|
- p->pages = pages;
|
|
|
- transferred = ((uint64_t) pages->num) * p->page_size + p->packet_len;
|
|
|
- qemu_file_acct_rate_limit(f, transferred);
|
|
|
- ram_counters.multifd_bytes += transferred;
|
|
|
- stat64_add(&ram_atomic_counters.transferred, transferred);
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- qemu_sem_post(&p->sem);
|
|
|
-
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-int multifd_queue_page(QEMUFile *f, RAMBlock *block, ram_addr_t offset)
|
|
|
-{
|
|
|
- MultiFDPages_t *pages = multifd_send_state->pages;
|
|
|
- bool changed = false;
|
|
|
-
|
|
|
- if (!pages->block) {
|
|
|
- pages->block = block;
|
|
|
- }
|
|
|
-
|
|
|
- if (pages->block == block) {
|
|
|
- pages->offset[pages->num] = offset;
|
|
|
- pages->num++;
|
|
|
-
|
|
|
- if (pages->num < pages->allocated) {
|
|
|
- return 1;
|
|
|
- }
|
|
|
- } else {
|
|
|
- changed = true;
|
|
|
- }
|
|
|
-
|
|
|
- if (multifd_send_pages(f) < 0) {
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- if (changed) {
|
|
|
- return multifd_queue_page(f, block, offset);
|
|
|
- }
|
|
|
-
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-static void multifd_send_terminate_threads(Error *err)
|
|
|
-{
|
|
|
- int i;
|
|
|
-
|
|
|
- trace_multifd_send_terminate_threads(err != NULL);
|
|
|
-
|
|
|
- if (err) {
|
|
|
- MigrationState *s = migrate_get_current();
|
|
|
- migrate_set_error(s, err);
|
|
|
- if (s->state == MIGRATION_STATUS_SETUP ||
|
|
|
- s->state == MIGRATION_STATUS_PRE_SWITCHOVER ||
|
|
|
- s->state == MIGRATION_STATUS_DEVICE ||
|
|
|
- s->state == MIGRATION_STATUS_ACTIVE) {
|
|
|
- migrate_set_state(&s->state, s->state,
|
|
|
- MIGRATION_STATUS_FAILED);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * We don't want to exit each threads twice. Depending on where
|
|
|
- * we get the error, or if there are two independent errors in two
|
|
|
- * threads at the same time, we can end calling this function
|
|
|
- * twice.
|
|
|
- */
|
|
|
- if (qatomic_xchg(&multifd_send_state->exiting, 1)) {
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDSendParams *p = &multifd_send_state->params[i];
|
|
|
-
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
- p->quit = true;
|
|
|
- qemu_sem_post(&p->sem);
|
|
|
- if (p->c) {
|
|
|
- qio_channel_shutdown(p->c, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
|
|
|
- }
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-void multifd_save_cleanup(void)
|
|
|
-{
|
|
|
- int i;
|
|
|
-
|
|
|
- if (!migrate_use_multifd() || !migrate_multi_channels_is_allowed()) {
|
|
|
- return;
|
|
|
- }
|
|
|
- multifd_send_terminate_threads(NULL);
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDSendParams *p = &multifd_send_state->params[i];
|
|
|
-
|
|
|
- if (p->running) {
|
|
|
- qemu_thread_join(&p->thread);
|
|
|
- }
|
|
|
- }
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDSendParams *p = &multifd_send_state->params[i];
|
|
|
- Error *local_err = NULL;
|
|
|
-
|
|
|
- if (p->registered_yank) {
|
|
|
- migration_ioc_unregister_yank(p->c);
|
|
|
- }
|
|
|
- socket_send_channel_destroy(p->c);
|
|
|
- p->c = NULL;
|
|
|
- qemu_mutex_destroy(&p->mutex);
|
|
|
- qemu_sem_destroy(&p->sem);
|
|
|
- qemu_sem_destroy(&p->sem_sync);
|
|
|
- g_free(p->name);
|
|
|
- p->name = NULL;
|
|
|
- multifd_pages_clear(p->pages);
|
|
|
- p->pages = NULL;
|
|
|
- p->packet_len = 0;
|
|
|
- g_free(p->packet);
|
|
|
- p->packet = NULL;
|
|
|
- g_free(p->iov);
|
|
|
- p->iov = NULL;
|
|
|
- g_free(p->normal);
|
|
|
- p->normal = NULL;
|
|
|
- multifd_send_state->ops->send_cleanup(p, &local_err);
|
|
|
- if (local_err) {
|
|
|
- migrate_set_error(migrate_get_current(), local_err);
|
|
|
- error_free(local_err);
|
|
|
- }
|
|
|
- }
|
|
|
- qemu_sem_destroy(&multifd_send_state->channels_ready);
|
|
|
- g_free(multifd_send_state->params);
|
|
|
- multifd_send_state->params = NULL;
|
|
|
- multifd_pages_clear(multifd_send_state->pages);
|
|
|
- multifd_send_state->pages = NULL;
|
|
|
- g_free(multifd_send_state);
|
|
|
- multifd_send_state = NULL;
|
|
|
-}
|
|
|
-
|
|
|
-static int multifd_zero_copy_flush(QIOChannel *c)
|
|
|
-{
|
|
|
- int ret;
|
|
|
- Error *err = NULL;
|
|
|
-
|
|
|
- ret = qio_channel_flush(c, &err);
|
|
|
- if (ret < 0) {
|
|
|
- error_report_err(err);
|
|
|
- return -1;
|
|
|
- }
|
|
|
- if (ret == 1) {
|
|
|
- dirty_sync_missed_zero_copy();
|
|
|
- }
|
|
|
-
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-int multifd_send_sync_main(QEMUFile *f)
|
|
|
-{
|
|
|
- int i;
|
|
|
- bool flush_zero_copy;
|
|
|
-
|
|
|
- if (!migrate_use_multifd()) {
|
|
|
- return 0;
|
|
|
- }
|
|
|
- if (multifd_send_state->pages->num) {
|
|
|
- if (multifd_send_pages(f) < 0) {
|
|
|
- error_report("%s: multifd_send_pages fail", __func__);
|
|
|
- return -1;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * When using zero-copy, it's necessary to flush the pages before any of
|
|
|
- * the pages can be sent again, so we'll make sure the new version of the
|
|
|
- * pages will always arrive _later_ than the old pages.
|
|
|
- *
|
|
|
- * Currently we achieve this by flushing the zero-page requested writes
|
|
|
- * per ram iteration, but in the future we could potentially optimize it
|
|
|
- * to be less frequent, e.g. only after we finished one whole scanning of
|
|
|
- * all the dirty bitmaps.
|
|
|
- */
|
|
|
-
|
|
|
- flush_zero_copy = migrate_use_zero_copy_send();
|
|
|
-
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDSendParams *p = &multifd_send_state->params[i];
|
|
|
-
|
|
|
- trace_multifd_send_sync_main_signal(p->id);
|
|
|
-
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
-
|
|
|
- if (p->quit) {
|
|
|
- error_report("%s: channel %d has already quit", __func__, i);
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- p->packet_num = multifd_send_state->packet_num++;
|
|
|
- p->flags |= MULTIFD_FLAG_SYNC;
|
|
|
- p->pending_job++;
|
|
|
- qemu_file_acct_rate_limit(f, p->packet_len);
|
|
|
- ram_counters.multifd_bytes += p->packet_len;
|
|
|
- stat64_add(&ram_atomic_counters.transferred, p->packet_len);
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- qemu_sem_post(&p->sem);
|
|
|
-
|
|
|
- if (flush_zero_copy && p->c && (multifd_zero_copy_flush(p->c) < 0)) {
|
|
|
- return -1;
|
|
|
- }
|
|
|
- }
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDSendParams *p = &multifd_send_state->params[i];
|
|
|
-
|
|
|
- trace_multifd_send_sync_main_wait(p->id);
|
|
|
- qemu_sem_wait(&p->sem_sync);
|
|
|
- }
|
|
|
- trace_multifd_send_sync_main(multifd_send_state->packet_num);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static void *multifd_send_thread(void *opaque)
|
|
|
-{
|
|
|
- MultiFDSendParams *p = opaque;
|
|
|
- Error *local_err = NULL;
|
|
|
- int ret = 0;
|
|
|
- bool use_zero_copy_send = migrate_use_zero_copy_send();
|
|
|
-
|
|
|
- trace_multifd_send_thread_start(p->id);
|
|
|
- rcu_register_thread();
|
|
|
-
|
|
|
- if (multifd_send_initial_packet(p, &local_err) < 0) {
|
|
|
- ret = -1;
|
|
|
- goto out;
|
|
|
- }
|
|
|
- /* initial packet */
|
|
|
- p->num_packets = 1;
|
|
|
-
|
|
|
- while (true) {
|
|
|
- qemu_sem_wait(&p->sem);
|
|
|
-
|
|
|
- if (qatomic_read(&multifd_send_state->exiting)) {
|
|
|
- break;
|
|
|
- }
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
-
|
|
|
- if (p->pending_job) {
|
|
|
- uint64_t packet_num = p->packet_num;
|
|
|
- uint32_t flags = p->flags;
|
|
|
- p->normal_num = 0;
|
|
|
-
|
|
|
- if (use_zero_copy_send) {
|
|
|
- p->iovs_num = 0;
|
|
|
- } else {
|
|
|
- p->iovs_num = 1;
|
|
|
- }
|
|
|
-
|
|
|
- for (int i = 0; i < p->pages->num; i++) {
|
|
|
- p->normal[p->normal_num] = p->pages->offset[i];
|
|
|
- p->normal_num++;
|
|
|
- }
|
|
|
-
|
|
|
- if (p->normal_num) {
|
|
|
- ret = multifd_send_state->ops->send_prepare(p, &local_err);
|
|
|
- if (ret != 0) {
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
- multifd_send_fill_packet(p);
|
|
|
- p->flags = 0;
|
|
|
- p->num_packets++;
|
|
|
- p->total_normal_pages += p->normal_num;
|
|
|
- p->pages->num = 0;
|
|
|
- p->pages->block = NULL;
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
-
|
|
|
- trace_multifd_send(p->id, packet_num, p->normal_num, flags,
|
|
|
- p->next_packet_size);
|
|
|
-
|
|
|
- if (use_zero_copy_send) {
|
|
|
- /* Send header first, without zerocopy */
|
|
|
- ret = qio_channel_write_all(p->c, (void *)p->packet,
|
|
|
- p->packet_len, &local_err);
|
|
|
- if (ret != 0) {
|
|
|
- break;
|
|
|
- }
|
|
|
- } else {
|
|
|
- /* Send header using the same writev call */
|
|
|
- p->iov[0].iov_len = p->packet_len;
|
|
|
- p->iov[0].iov_base = p->packet;
|
|
|
- }
|
|
|
-
|
|
|
- ret = qio_channel_writev_full_all(p->c, p->iov, p->iovs_num, NULL,
|
|
|
- 0, p->write_flags, &local_err);
|
|
|
- if (ret != 0) {
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
- p->pending_job--;
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
-
|
|
|
- if (flags & MULTIFD_FLAG_SYNC) {
|
|
|
- qemu_sem_post(&p->sem_sync);
|
|
|
- }
|
|
|
- qemu_sem_post(&multifd_send_state->channels_ready);
|
|
|
- } else if (p->quit) {
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- break;
|
|
|
- } else {
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- /* sometimes there are spurious wakeups */
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-out:
|
|
|
- if (local_err) {
|
|
|
- trace_multifd_send_error(p->id);
|
|
|
- multifd_send_terminate_threads(local_err);
|
|
|
- error_free(local_err);
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * Error happen, I will exit, but I can't just leave, tell
|
|
|
- * who pay attention to me.
|
|
|
- */
|
|
|
- if (ret != 0) {
|
|
|
- qemu_sem_post(&p->sem_sync);
|
|
|
- qemu_sem_post(&multifd_send_state->channels_ready);
|
|
|
- }
|
|
|
-
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
- p->running = false;
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
-
|
|
|
- rcu_unregister_thread();
|
|
|
- trace_multifd_send_thread_end(p->id, p->num_packets, p->total_normal_pages);
|
|
|
-
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-static bool multifd_channel_connect(MultiFDSendParams *p,
|
|
|
- QIOChannel *ioc,
|
|
|
- Error *error);
|
|
|
-
|
|
|
-static void multifd_tls_outgoing_handshake(QIOTask *task,
|
|
|
- gpointer opaque)
|
|
|
-{
|
|
|
- MultiFDSendParams *p = opaque;
|
|
|
- QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
|
|
|
- Error *err = NULL;
|
|
|
-
|
|
|
- if (qio_task_propagate_error(task, &err)) {
|
|
|
- trace_multifd_tls_outgoing_handshake_error(ioc, error_get_pretty(err));
|
|
|
- } else {
|
|
|
- trace_multifd_tls_outgoing_handshake_complete(ioc);
|
|
|
- }
|
|
|
-
|
|
|
- if (!multifd_channel_connect(p, ioc, err)) {
|
|
|
- /*
|
|
|
- * Error happen, mark multifd_send_thread status as 'quit' although it
|
|
|
- * is not created, and then tell who pay attention to me.
|
|
|
- */
|
|
|
- p->quit = true;
|
|
|
- qemu_sem_post(&multifd_send_state->channels_ready);
|
|
|
- qemu_sem_post(&p->sem_sync);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void *multifd_tls_handshake_thread(void *opaque)
|
|
|
-{
|
|
|
- MultiFDSendParams *p = opaque;
|
|
|
- QIOChannelTLS *tioc = QIO_CHANNEL_TLS(p->c);
|
|
|
-
|
|
|
- qio_channel_tls_handshake(tioc,
|
|
|
- multifd_tls_outgoing_handshake,
|
|
|
- p,
|
|
|
- NULL,
|
|
|
- NULL);
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-static void multifd_tls_channel_connect(MultiFDSendParams *p,
|
|
|
- QIOChannel *ioc,
|
|
|
- Error **errp)
|
|
|
-{
|
|
|
- MigrationState *s = migrate_get_current();
|
|
|
- const char *hostname = s->hostname;
|
|
|
- QIOChannelTLS *tioc;
|
|
|
-
|
|
|
- tioc = migration_tls_client_create(s, ioc, hostname, errp);
|
|
|
- if (!tioc) {
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- object_unref(OBJECT(ioc));
|
|
|
- trace_multifd_tls_outgoing_handshake_start(ioc, tioc, hostname);
|
|
|
- qio_channel_set_name(QIO_CHANNEL(tioc), "multifd-tls-outgoing");
|
|
|
- p->c = QIO_CHANNEL(tioc);
|
|
|
- qemu_thread_create(&p->thread, "multifd-tls-handshake-worker",
|
|
|
- multifd_tls_handshake_thread, p,
|
|
|
- QEMU_THREAD_JOINABLE);
|
|
|
-}
|
|
|
-
|
|
|
-static bool multifd_channel_connect(MultiFDSendParams *p,
|
|
|
- QIOChannel *ioc,
|
|
|
- Error *error)
|
|
|
-{
|
|
|
- trace_multifd_set_outgoing_channel(
|
|
|
- ioc, object_get_typename(OBJECT(ioc)),
|
|
|
- migrate_get_current()->hostname, error);
|
|
|
-
|
|
|
- if (!error) {
|
|
|
- if (migrate_channel_requires_tls_upgrade(ioc)) {
|
|
|
- multifd_tls_channel_connect(p, ioc, &error);
|
|
|
- if (!error) {
|
|
|
- /*
|
|
|
- * tls_channel_connect will call back to this
|
|
|
- * function after the TLS handshake,
|
|
|
- * so we mustn't call multifd_send_thread until then
|
|
|
- */
|
|
|
- return true;
|
|
|
- } else {
|
|
|
- return false;
|
|
|
- }
|
|
|
- } else {
|
|
|
- migration_ioc_register_yank(ioc);
|
|
|
- p->registered_yank = true;
|
|
|
- p->c = ioc;
|
|
|
- qemu_thread_create(&p->thread, p->name, multifd_send_thread, p,
|
|
|
- QEMU_THREAD_JOINABLE);
|
|
|
- }
|
|
|
- return true;
|
|
|
- }
|
|
|
-
|
|
|
- return false;
|
|
|
-}
|
|
|
-
|
|
|
-static void multifd_new_send_channel_cleanup(MultiFDSendParams *p,
|
|
|
- QIOChannel *ioc, Error *err)
|
|
|
-{
|
|
|
- migrate_set_error(migrate_get_current(), err);
|
|
|
- /* Error happen, we need to tell who pay attention to me */
|
|
|
- qemu_sem_post(&multifd_send_state->channels_ready);
|
|
|
- qemu_sem_post(&p->sem_sync);
|
|
|
- /*
|
|
|
- * Although multifd_send_thread is not created, but main migration
|
|
|
- * thread neet to judge whether it is running, so we need to mark
|
|
|
- * its status.
|
|
|
- */
|
|
|
- p->quit = true;
|
|
|
- object_unref(OBJECT(ioc));
|
|
|
- error_free(err);
|
|
|
-}
|
|
|
-
|
|
|
-static void multifd_new_send_channel_async(QIOTask *task, gpointer opaque)
|
|
|
-{
|
|
|
- MultiFDSendParams *p = opaque;
|
|
|
- QIOChannel *sioc = QIO_CHANNEL(qio_task_get_source(task));
|
|
|
- Error *local_err = NULL;
|
|
|
-
|
|
|
- trace_multifd_new_send_channel_async(p->id);
|
|
|
- if (qio_task_propagate_error(task, &local_err)) {
|
|
|
- goto cleanup;
|
|
|
- } else {
|
|
|
- p->c = QIO_CHANNEL(sioc);
|
|
|
- qio_channel_set_delay(p->c, false);
|
|
|
- p->running = true;
|
|
|
- if (!multifd_channel_connect(p, sioc, local_err)) {
|
|
|
- goto cleanup;
|
|
|
- }
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
-cleanup:
|
|
|
- multifd_new_send_channel_cleanup(p, sioc, local_err);
|
|
|
-}
|
|
|
-
|
|
|
-int multifd_save_setup(Error **errp)
|
|
|
-{
|
|
|
- int thread_count;
|
|
|
- uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size();
|
|
|
- uint8_t i;
|
|
|
-
|
|
|
- if (!migrate_use_multifd()) {
|
|
|
- return 0;
|
|
|
- }
|
|
|
- if (!migrate_multi_channels_is_allowed()) {
|
|
|
- error_setg(errp, "multifd is not supported by current protocol");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- thread_count = migrate_multifd_channels();
|
|
|
- multifd_send_state = g_malloc0(sizeof(*multifd_send_state));
|
|
|
- multifd_send_state->params = g_new0(MultiFDSendParams, thread_count);
|
|
|
- multifd_send_state->pages = multifd_pages_init(page_count);
|
|
|
- qemu_sem_init(&multifd_send_state->channels_ready, 0);
|
|
|
- qatomic_set(&multifd_send_state->exiting, 0);
|
|
|
- multifd_send_state->ops = multifd_ops[migrate_multifd_compression()];
|
|
|
-
|
|
|
- for (i = 0; i < thread_count; i++) {
|
|
|
- MultiFDSendParams *p = &multifd_send_state->params[i];
|
|
|
-
|
|
|
- qemu_mutex_init(&p->mutex);
|
|
|
- qemu_sem_init(&p->sem, 0);
|
|
|
- qemu_sem_init(&p->sem_sync, 0);
|
|
|
- p->quit = false;
|
|
|
- p->pending_job = 0;
|
|
|
- p->id = i;
|
|
|
- p->pages = multifd_pages_init(page_count);
|
|
|
- p->packet_len = sizeof(MultiFDPacket_t)
|
|
|
- + sizeof(uint64_t) * page_count;
|
|
|
- p->packet = g_malloc0(p->packet_len);
|
|
|
- p->packet->magic = cpu_to_be32(MULTIFD_MAGIC);
|
|
|
- p->packet->version = cpu_to_be32(MULTIFD_VERSION);
|
|
|
- p->name = g_strdup_printf("multifdsend_%d", i);
|
|
|
- /* We need one extra place for the packet header */
|
|
|
- p->iov = g_new0(struct iovec, page_count + 1);
|
|
|
- p->normal = g_new0(ram_addr_t, page_count);
|
|
|
- p->page_size = qemu_target_page_size();
|
|
|
- p->page_count = page_count;
|
|
|
-
|
|
|
- if (migrate_use_zero_copy_send()) {
|
|
|
- p->write_flags = QIO_CHANNEL_WRITE_FLAG_ZERO_COPY;
|
|
|
- } else {
|
|
|
- p->write_flags = 0;
|
|
|
- }
|
|
|
-
|
|
|
- socket_send_channel_create(multifd_new_send_channel_async, p);
|
|
|
- }
|
|
|
-
|
|
|
- for (i = 0; i < thread_count; i++) {
|
|
|
- MultiFDSendParams *p = &multifd_send_state->params[i];
|
|
|
- Error *local_err = NULL;
|
|
|
- int ret;
|
|
|
-
|
|
|
- ret = multifd_send_state->ops->send_setup(p, &local_err);
|
|
|
- if (ret) {
|
|
|
- error_propagate(errp, local_err);
|
|
|
- return ret;
|
|
|
- }
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-struct {
|
|
|
- MultiFDRecvParams *params;
|
|
|
- /* number of created threads */
|
|
|
- int count;
|
|
|
- /* syncs main thread and channels */
|
|
|
- QemuSemaphore sem_sync;
|
|
|
- /* global number of generated multifd packets */
|
|
|
- uint64_t packet_num;
|
|
|
- /* multifd ops */
|
|
|
- MultiFDMethods *ops;
|
|
|
-} *multifd_recv_state;
|
|
|
-
|
|
|
-static void multifd_recv_terminate_threads(Error *err)
|
|
|
-{
|
|
|
- int i;
|
|
|
-
|
|
|
- trace_multifd_recv_terminate_threads(err != NULL);
|
|
|
-
|
|
|
- if (err) {
|
|
|
- MigrationState *s = migrate_get_current();
|
|
|
- migrate_set_error(s, err);
|
|
|
- if (s->state == MIGRATION_STATUS_SETUP ||
|
|
|
- s->state == MIGRATION_STATUS_ACTIVE) {
|
|
|
- migrate_set_state(&s->state, s->state,
|
|
|
- MIGRATION_STATUS_FAILED);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDRecvParams *p = &multifd_recv_state->params[i];
|
|
|
-
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
- p->quit = true;
|
|
|
- /*
|
|
|
- * We could arrive here for two reasons:
|
|
|
- * - normal quit, i.e. everything went fine, just finished
|
|
|
- * - error quit: We close the channels so the channel threads
|
|
|
- * finish the qio_channel_read_all_eof()
|
|
|
- */
|
|
|
- if (p->c) {
|
|
|
- qio_channel_shutdown(p->c, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
|
|
|
- }
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-int multifd_load_cleanup(Error **errp)
|
|
|
-{
|
|
|
- int i;
|
|
|
-
|
|
|
- if (!migrate_use_multifd() || !migrate_multi_channels_is_allowed()) {
|
|
|
- return 0;
|
|
|
- }
|
|
|
- multifd_recv_terminate_threads(NULL);
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDRecvParams *p = &multifd_recv_state->params[i];
|
|
|
-
|
|
|
- if (p->running) {
|
|
|
- p->quit = true;
|
|
|
- /*
|
|
|
- * multifd_recv_thread may hung at MULTIFD_FLAG_SYNC handle code,
|
|
|
- * however try to wakeup it without harm in cleanup phase.
|
|
|
- */
|
|
|
- qemu_sem_post(&p->sem_sync);
|
|
|
- qemu_thread_join(&p->thread);
|
|
|
- }
|
|
|
- }
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDRecvParams *p = &multifd_recv_state->params[i];
|
|
|
-
|
|
|
- migration_ioc_unregister_yank(p->c);
|
|
|
- object_unref(OBJECT(p->c));
|
|
|
- p->c = NULL;
|
|
|
- qemu_mutex_destroy(&p->mutex);
|
|
|
- qemu_sem_destroy(&p->sem_sync);
|
|
|
- g_free(p->name);
|
|
|
- p->name = NULL;
|
|
|
- p->packet_len = 0;
|
|
|
- g_free(p->packet);
|
|
|
- p->packet = NULL;
|
|
|
- g_free(p->iov);
|
|
|
- p->iov = NULL;
|
|
|
- g_free(p->normal);
|
|
|
- p->normal = NULL;
|
|
|
- multifd_recv_state->ops->recv_cleanup(p);
|
|
|
- }
|
|
|
- qemu_sem_destroy(&multifd_recv_state->sem_sync);
|
|
|
- g_free(multifd_recv_state->params);
|
|
|
- multifd_recv_state->params = NULL;
|
|
|
- g_free(multifd_recv_state);
|
|
|
- multifd_recv_state = NULL;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-void multifd_recv_sync_main(void)
|
|
|
-{
|
|
|
- int i;
|
|
|
-
|
|
|
- if (!migrate_use_multifd()) {
|
|
|
- return;
|
|
|
- }
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDRecvParams *p = &multifd_recv_state->params[i];
|
|
|
-
|
|
|
- trace_multifd_recv_sync_main_wait(p->id);
|
|
|
- qemu_sem_wait(&multifd_recv_state->sem_sync);
|
|
|
- }
|
|
|
- for (i = 0; i < migrate_multifd_channels(); i++) {
|
|
|
- MultiFDRecvParams *p = &multifd_recv_state->params[i];
|
|
|
-
|
|
|
- WITH_QEMU_LOCK_GUARD(&p->mutex) {
|
|
|
- if (multifd_recv_state->packet_num < p->packet_num) {
|
|
|
- multifd_recv_state->packet_num = p->packet_num;
|
|
|
- }
|
|
|
- }
|
|
|
- trace_multifd_recv_sync_main_signal(p->id);
|
|
|
- qemu_sem_post(&p->sem_sync);
|
|
|
- }
|
|
|
- trace_multifd_recv_sync_main(multifd_recv_state->packet_num);
|
|
|
-}
|
|
|
-
|
|
|
-static void *multifd_recv_thread(void *opaque)
|
|
|
-{
|
|
|
- MultiFDRecvParams *p = opaque;
|
|
|
- Error *local_err = NULL;
|
|
|
- int ret;
|
|
|
-
|
|
|
- trace_multifd_recv_thread_start(p->id);
|
|
|
- rcu_register_thread();
|
|
|
-
|
|
|
- while (true) {
|
|
|
- uint32_t flags;
|
|
|
-
|
|
|
- if (p->quit) {
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- ret = qio_channel_read_all_eof(p->c, (void *)p->packet,
|
|
|
- p->packet_len, &local_err);
|
|
|
- if (ret == 0) { /* EOF */
|
|
|
- break;
|
|
|
- }
|
|
|
- if (ret == -1) { /* Error */
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
- ret = multifd_recv_unfill_packet(p, &local_err);
|
|
|
- if (ret) {
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- flags = p->flags;
|
|
|
- /* recv methods don't know how to handle the SYNC flag */
|
|
|
- p->flags &= ~MULTIFD_FLAG_SYNC;
|
|
|
- trace_multifd_recv(p->id, p->packet_num, p->normal_num, flags,
|
|
|
- p->next_packet_size);
|
|
|
- p->num_packets++;
|
|
|
- p->total_normal_pages += p->normal_num;
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
-
|
|
|
- if (p->normal_num) {
|
|
|
- ret = multifd_recv_state->ops->recv_pages(p, &local_err);
|
|
|
- if (ret != 0) {
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if (flags & MULTIFD_FLAG_SYNC) {
|
|
|
- qemu_sem_post(&multifd_recv_state->sem_sync);
|
|
|
- qemu_sem_wait(&p->sem_sync);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if (local_err) {
|
|
|
- multifd_recv_terminate_threads(local_err);
|
|
|
- error_free(local_err);
|
|
|
- }
|
|
|
- qemu_mutex_lock(&p->mutex);
|
|
|
- p->running = false;
|
|
|
- qemu_mutex_unlock(&p->mutex);
|
|
|
-
|
|
|
- rcu_unregister_thread();
|
|
|
- trace_multifd_recv_thread_end(p->id, p->num_packets, p->total_normal_pages);
|
|
|
-
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-int multifd_load_setup(Error **errp)
|
|
|
-{
|
|
|
- int thread_count;
|
|
|
- uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size();
|
|
|
- uint8_t i;
|
|
|
-
|
|
|
- /*
|
|
|
- * Return successfully if multiFD recv state is already initialised
|
|
|
- * or multiFD is not enabled.
|
|
|
- */
|
|
|
- if (multifd_recv_state || !migrate_use_multifd()) {
|
|
|
- return 0;
|
|
|
- }
|
|
|
-
|
|
|
- if (!migrate_multi_channels_is_allowed()) {
|
|
|
- error_setg(errp, "multifd is not supported by current protocol");
|
|
|
- return -1;
|
|
|
- }
|
|
|
- thread_count = migrate_multifd_channels();
|
|
|
- multifd_recv_state = g_malloc0(sizeof(*multifd_recv_state));
|
|
|
- multifd_recv_state->params = g_new0(MultiFDRecvParams, thread_count);
|
|
|
- qatomic_set(&multifd_recv_state->count, 0);
|
|
|
- qemu_sem_init(&multifd_recv_state->sem_sync, 0);
|
|
|
- multifd_recv_state->ops = multifd_ops[migrate_multifd_compression()];
|
|
|
-
|
|
|
- for (i = 0; i < thread_count; i++) {
|
|
|
- MultiFDRecvParams *p = &multifd_recv_state->params[i];
|
|
|
-
|
|
|
- qemu_mutex_init(&p->mutex);
|
|
|
- qemu_sem_init(&p->sem_sync, 0);
|
|
|
- p->quit = false;
|
|
|
- p->id = i;
|
|
|
- p->packet_len = sizeof(MultiFDPacket_t)
|
|
|
- + sizeof(uint64_t) * page_count;
|
|
|
- p->packet = g_malloc0(p->packet_len);
|
|
|
- p->name = g_strdup_printf("multifdrecv_%d", i);
|
|
|
- p->iov = g_new0(struct iovec, page_count);
|
|
|
- p->normal = g_new0(ram_addr_t, page_count);
|
|
|
- p->page_count = page_count;
|
|
|
- p->page_size = qemu_target_page_size();
|
|
|
- }
|
|
|
-
|
|
|
- for (i = 0; i < thread_count; i++) {
|
|
|
- MultiFDRecvParams *p = &multifd_recv_state->params[i];
|
|
|
- Error *local_err = NULL;
|
|
|
- int ret;
|
|
|
-
|
|
|
- ret = multifd_recv_state->ops->recv_setup(p, &local_err);
|
|
|
- if (ret) {
|
|
|
- error_propagate(errp, local_err);
|
|
|
- return ret;
|
|
|
- }
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-bool multifd_recv_all_channels_created(void)
|
|
|
-{
|
|
|
- int thread_count = migrate_multifd_channels();
|
|
|
-
|
|
|
- if (!migrate_use_multifd()) {
|
|
|
- return true;
|
|
|
- }
|
|
|
-
|
|
|
- if (!multifd_recv_state) {
|
|
|
- /* Called before any connections created */
|
|
|
- return false;
|
|
|
- }
|
|
|
-
|
|
|
- return thread_count == qatomic_read(&multifd_recv_state->count);
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Try to receive all multifd channels to get ready for the migration.
|
|
|
- * Sets @errp when failing to receive the current channel.
|
|
|
- */
|
|
|
-void multifd_recv_new_channel(QIOChannel *ioc, Error **errp)
|
|
|
-{
|
|
|
- MultiFDRecvParams *p;
|
|
|
- Error *local_err = NULL;
|
|
|
- int id;
|
|
|
-
|
|
|
- id = multifd_recv_initial_packet(ioc, &local_err);
|
|
|
- if (id < 0) {
|
|
|
- multifd_recv_terminate_threads(local_err);
|
|
|
- error_propagate_prepend(errp, local_err,
|
|
|
- "failed to receive packet"
|
|
|
- " via multifd channel %d: ",
|
|
|
- qatomic_read(&multifd_recv_state->count));
|
|
|
- return;
|
|
|
- }
|
|
|
- trace_multifd_recv_new_channel(id);
|
|
|
-
|
|
|
- p = &multifd_recv_state->params[id];
|
|
|
- if (p->c != NULL) {
|
|
|
- error_setg(&local_err, "multifd: received id '%d' already setup'",
|
|
|
- id);
|
|
|
- multifd_recv_terminate_threads(local_err);
|
|
|
- error_propagate(errp, local_err);
|
|
|
- return;
|
|
|
- }
|
|
|
- p->c = ioc;
|
|
|
- object_ref(OBJECT(ioc));
|
|
|
- /* initial packet */
|
|
|
- p->num_packets = 1;
|
|
|
-
|
|
|
- p->running = true;
|
|
|
- qemu_thread_create(&p->thread, p->name, multifd_recv_thread, p,
|
|
|
- QEMU_THREAD_JOINABLE);
|
|
|
- qatomic_inc(&multifd_recv_state->count);
|
|
|
-}
|
Peter Maydell