When all we do with an Error we receive into a local variable is propagating to somewhere else, we can just as well receive it there right away. Convert if (!foo(..., &err)) { ... error_propagate(errp, err); ... return ... } to if (!foo(..., errp)) { ... ... return ... } where nothing else needs @err. Coccinelle script: @rule1 forall@ identifier fun, err, errp, lbl; expression list args, args2; binary operator op; constant c1, c2; symbol false; @@ if ( ( - fun(args, &err, args2) + fun(args, errp, args2) | - !fun(args, &err, args2) + !fun(args, errp, args2) | - fun(args, &err, args2) op c1 + fun(args, errp, args2) op c1 ) ) { ... when != err when != lbl: when strict - error_propagate(errp, err); ... when != err ( return; | return c2; | return false; ) } @rule2 forall@ identifier fun, err, errp, lbl; expression list args, args2; expression var; binary operator op; constant c1, c2; symbol false; @@ - var = fun(args, &err, args2); + var = fun(args, errp, args2); ... when != err if ( ( var | !var | var op c1 ) ) { ... when != err when != lbl: when strict - error_propagate(errp, err); ... when != err ( return; | return c2; | return false; | return var; ) } @depends on rule1 || rule2@ identifier err; @@ - Error *err = NULL; ... when != err Not exactly elegant, I'm afraid. The "when != lbl:" is necessary to avoid transforming if (fun(args, &err)) { goto out } ... out: error_propagate(errp, err); even though other paths to label out still need the error_propagate(). For an actual example, see sclp_realize(). Without the "when strict", Coccinelle transforms vfio_msix_setup(), incorrectly. I don't know what exactly "when strict" does, only that it helps here. The match of return is narrower than what I want, but I can't figure out how to express "return where the operand doesn't use @err". For an example where it's too narrow, see vfio_intx_enable(). Silently fails to convert hw/arm/armsse.c, because Coccinelle gets confused by ARMSSE being used both as typedef and function-like macro there. Converted manually. Line breaks tidied up manually. One nested declaration of @local_err deleted manually. Preexisting unwanted blank line dropped in hw/riscv/sifive_e.c. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20200707160613.848843-35-armbru@redhat.com>
1468 lines
44 KiB
C
1468 lines
44 KiB
C
/*
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* COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
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* (a.k.a. Fault Tolerance or Continuous Replication)
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*
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* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
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* Copyright (c) 2016 FUJITSU LIMITED
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* Copyright (c) 2016 Intel Corporation
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*
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* Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "qemu/error-report.h"
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#include "trace.h"
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#include "qapi/error.h"
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#include "net/net.h"
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#include "net/eth.h"
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#include "qom/object_interfaces.h"
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#include "qemu/iov.h"
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#include "qom/object.h"
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#include "net/queue.h"
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#include "chardev/char-fe.h"
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#include "qemu/sockets.h"
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#include "colo.h"
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#include "sysemu/iothread.h"
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#include "net/colo-compare.h"
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#include "migration/colo.h"
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#include "migration/migration.h"
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#include "util.h"
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#include "block/aio-wait.h"
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#include "qemu/coroutine.h"
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#define TYPE_COLO_COMPARE "colo-compare"
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#define COLO_COMPARE(obj) \
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OBJECT_CHECK(CompareState, (obj), TYPE_COLO_COMPARE)
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static QTAILQ_HEAD(, CompareState) net_compares =
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QTAILQ_HEAD_INITIALIZER(net_compares);
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static NotifierList colo_compare_notifiers =
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NOTIFIER_LIST_INITIALIZER(colo_compare_notifiers);
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#define COMPARE_READ_LEN_MAX NET_BUFSIZE
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#define MAX_QUEUE_SIZE 1024
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#define COLO_COMPARE_FREE_PRIMARY 0x01
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#define COLO_COMPARE_FREE_SECONDARY 0x02
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#define REGULAR_PACKET_CHECK_MS 3000
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#define DEFAULT_TIME_OUT_MS 3000
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static QemuMutex colo_compare_mutex;
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static bool colo_compare_active;
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static QemuMutex event_mtx;
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static QemuCond event_complete_cond;
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static int event_unhandled_count;
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/*
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* + CompareState ++
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* | |
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* +---------------+ +---------------+ +---------------+
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* | conn list + - > conn + ------- > conn + -- > ......
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* +---------------+ +---------------+ +---------------+
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* | | | | | |
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* +---------------+ +---v----+ +---v----+ +---v----+ +---v----+
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* |primary | |secondary |primary | |secondary
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* |packet | |packet + |packet | |packet +
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* +--------+ +--------+ +--------+ +--------+
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* | | | |
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* +---v----+ +---v----+ +---v----+ +---v----+
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* |primary | |secondary |primary | |secondary
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* |packet | |packet + |packet | |packet +
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* +--------+ +--------+ +--------+ +--------+
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* | | | |
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* +---v----+ +---v----+ +---v----+ +---v----+
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* |primary | |secondary |primary | |secondary
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* |packet | |packet + |packet | |packet +
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* +--------+ +--------+ +--------+ +--------+
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*/
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typedef struct SendCo {
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Coroutine *co;
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struct CompareState *s;
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CharBackend *chr;
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GQueue send_list;
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bool notify_remote_frame;
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bool done;
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int ret;
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} SendCo;
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typedef struct SendEntry {
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uint32_t size;
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uint32_t vnet_hdr_len;
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uint8_t *buf;
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} SendEntry;
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typedef struct CompareState {
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Object parent;
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char *pri_indev;
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char *sec_indev;
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char *outdev;
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char *notify_dev;
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CharBackend chr_pri_in;
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CharBackend chr_sec_in;
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CharBackend chr_out;
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CharBackend chr_notify_dev;
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SocketReadState pri_rs;
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SocketReadState sec_rs;
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SocketReadState notify_rs;
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SendCo out_sendco;
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SendCo notify_sendco;
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bool vnet_hdr;
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uint32_t compare_timeout;
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uint32_t expired_scan_cycle;
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/*
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* Record the connection that through the NIC
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* Element type: Connection
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*/
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GQueue conn_list;
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/* Record the connection without repetition */
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GHashTable *connection_track_table;
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IOThread *iothread;
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GMainContext *worker_context;
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QEMUTimer *packet_check_timer;
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QEMUBH *event_bh;
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enum colo_event event;
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QTAILQ_ENTRY(CompareState) next;
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} CompareState;
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typedef struct CompareClass {
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ObjectClass parent_class;
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} CompareClass;
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enum {
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PRIMARY_IN = 0,
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SECONDARY_IN,
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};
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static const char *colo_mode[] = {
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[PRIMARY_IN] = "primary",
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[SECONDARY_IN] = "secondary",
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};
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static int compare_chr_send(CompareState *s,
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uint8_t *buf,
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uint32_t size,
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uint32_t vnet_hdr_len,
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bool notify_remote_frame,
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bool zero_copy);
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static bool packet_matches_str(const char *str,
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const uint8_t *buf,
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uint32_t packet_len)
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{
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if (packet_len != strlen(str)) {
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return false;
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}
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return !memcmp(str, buf, strlen(str));
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}
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static void notify_remote_frame(CompareState *s)
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{
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char msg[] = "DO_CHECKPOINT";
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int ret = 0;
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ret = compare_chr_send(s, (uint8_t *)msg, strlen(msg), 0, true, false);
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if (ret < 0) {
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error_report("Notify Xen COLO-frame failed");
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}
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}
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static void colo_compare_inconsistency_notify(CompareState *s)
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{
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if (s->notify_dev) {
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notify_remote_frame(s);
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} else {
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notifier_list_notify(&colo_compare_notifiers,
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migrate_get_current());
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}
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}
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static gint seq_sorter(Packet *a, Packet *b, gpointer data)
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{
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struct tcp_hdr *atcp, *btcp;
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atcp = (struct tcp_hdr *)(a->transport_header);
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btcp = (struct tcp_hdr *)(b->transport_header);
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return ntohl(atcp->th_seq) - ntohl(btcp->th_seq);
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}
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static void fill_pkt_tcp_info(void *data, uint32_t *max_ack)
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{
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Packet *pkt = data;
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struct tcp_hdr *tcphd;
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tcphd = (struct tcp_hdr *)pkt->transport_header;
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pkt->tcp_seq = ntohl(tcphd->th_seq);
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pkt->tcp_ack = ntohl(tcphd->th_ack);
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*max_ack = *max_ack > pkt->tcp_ack ? *max_ack : pkt->tcp_ack;
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pkt->header_size = pkt->transport_header - (uint8_t *)pkt->data
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+ (tcphd->th_off << 2) - pkt->vnet_hdr_len;
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pkt->payload_size = pkt->size - pkt->header_size;
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pkt->seq_end = pkt->tcp_seq + pkt->payload_size;
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pkt->flags = tcphd->th_flags;
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}
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/*
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* Return 1 on success, if return 0 means the
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* packet will be dropped
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*/
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static int colo_insert_packet(GQueue *queue, Packet *pkt, uint32_t *max_ack)
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{
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if (g_queue_get_length(queue) <= MAX_QUEUE_SIZE) {
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if (pkt->ip->ip_p == IPPROTO_TCP) {
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fill_pkt_tcp_info(pkt, max_ack);
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g_queue_insert_sorted(queue,
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pkt,
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(GCompareDataFunc)seq_sorter,
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NULL);
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} else {
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g_queue_push_tail(queue, pkt);
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}
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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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* Return 0 on success, if return -1 means the pkt
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* is unsupported(arp and ipv6) and will be sent later
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*/
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static int packet_enqueue(CompareState *s, int mode, Connection **con)
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{
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ConnectionKey key;
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Packet *pkt = NULL;
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Connection *conn;
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int ret;
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if (mode == PRIMARY_IN) {
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pkt = packet_new(s->pri_rs.buf,
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s->pri_rs.packet_len,
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s->pri_rs.vnet_hdr_len);
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} else {
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pkt = packet_new(s->sec_rs.buf,
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s->sec_rs.packet_len,
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s->sec_rs.vnet_hdr_len);
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}
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if (parse_packet_early(pkt)) {
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packet_destroy(pkt, NULL);
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pkt = NULL;
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return -1;
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}
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fill_connection_key(pkt, &key);
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conn = connection_get(s->connection_track_table,
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&key,
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&s->conn_list);
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if (!conn->processing) {
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g_queue_push_tail(&s->conn_list, conn);
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conn->processing = true;
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}
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if (mode == PRIMARY_IN) {
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ret = colo_insert_packet(&conn->primary_list, pkt, &conn->pack);
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} else {
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ret = colo_insert_packet(&conn->secondary_list, pkt, &conn->sack);
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}
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if (!ret) {
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trace_colo_compare_drop_packet(colo_mode[mode],
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"queue size too big, drop packet");
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packet_destroy(pkt, NULL);
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pkt = NULL;
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}
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*con = conn;
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return 0;
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}
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static inline bool after(uint32_t seq1, uint32_t seq2)
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{
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return (int32_t)(seq1 - seq2) > 0;
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}
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static void colo_release_primary_pkt(CompareState *s, Packet *pkt)
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{
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int ret;
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ret = compare_chr_send(s,
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pkt->data,
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pkt->size,
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pkt->vnet_hdr_len,
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false,
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true);
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if (ret < 0) {
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error_report("colo send primary packet failed");
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}
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trace_colo_compare_main("packet same and release packet");
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packet_destroy_partial(pkt, NULL);
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}
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/*
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* The IP packets sent by primary and secondary
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* will be compared in here
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* TODO support ip fragment, Out-Of-Order
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* return: 0 means packet same
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* > 0 || < 0 means packet different
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*/
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static int colo_compare_packet_payload(Packet *ppkt,
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Packet *spkt,
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uint16_t poffset,
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uint16_t soffset,
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uint16_t len)
|
|
|
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{
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if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
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char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20];
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strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src));
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strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst));
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strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src));
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strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst));
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|
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trace_colo_compare_ip_info(ppkt->size, pri_ip_src,
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pri_ip_dst, spkt->size,
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sec_ip_src, sec_ip_dst);
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}
|
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|
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return memcmp(ppkt->data + poffset, spkt->data + soffset, len);
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}
|
|
|
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/*
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* return true means that the payload is consist and
|
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* need to make the next comparison, false means do
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* the checkpoint
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*/
|
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static bool colo_mark_tcp_pkt(Packet *ppkt, Packet *spkt,
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int8_t *mark, uint32_t max_ack)
|
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{
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*mark = 0;
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|
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if (ppkt->tcp_seq == spkt->tcp_seq && ppkt->seq_end == spkt->seq_end) {
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if (!colo_compare_packet_payload(ppkt, spkt,
|
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ppkt->header_size, spkt->header_size,
|
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ppkt->payload_size)) {
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*mark = COLO_COMPARE_FREE_SECONDARY | COLO_COMPARE_FREE_PRIMARY;
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return true;
|
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}
|
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}
|
|
|
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/* one part of secondary packet payload still need to be compared */
|
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if (!after(ppkt->seq_end, spkt->seq_end)) {
|
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if (!colo_compare_packet_payload(ppkt, spkt,
|
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ppkt->header_size + ppkt->offset,
|
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spkt->header_size + spkt->offset,
|
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ppkt->payload_size - ppkt->offset)) {
|
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if (!after(ppkt->tcp_ack, max_ack)) {
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*mark = COLO_COMPARE_FREE_PRIMARY;
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spkt->offset += ppkt->payload_size - ppkt->offset;
|
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return true;
|
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} else {
|
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/* secondary guest hasn't ack the data, don't send
|
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* out this packet
|
|
*/
|
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return false;
|
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}
|
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}
|
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} else {
|
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/* primary packet is longer than secondary packet, compare
|
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* the same part and mark the primary packet offset
|
|
*/
|
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if (!colo_compare_packet_payload(ppkt, spkt,
|
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ppkt->header_size + ppkt->offset,
|
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spkt->header_size + spkt->offset,
|
|
spkt->payload_size - spkt->offset)) {
|
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*mark = COLO_COMPARE_FREE_SECONDARY;
|
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ppkt->offset += spkt->payload_size - spkt->offset;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void colo_compare_tcp(CompareState *s, Connection *conn)
|
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{
|
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Packet *ppkt = NULL, *spkt = NULL;
|
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int8_t mark;
|
|
|
|
/*
|
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* If ppkt and spkt have the same payload, but ppkt's ACK
|
|
* is greater than spkt's ACK, in this case we can not
|
|
* send the ppkt because it will cause the secondary guest
|
|
* to miss sending some data in the next. Therefore, we
|
|
* record the maximum ACK in the current queue at both
|
|
* primary side and secondary side. Only when the ack is
|
|
* less than the smaller of the two maximum ack, then we
|
|
* can ensure that the packet's payload is acknowledged by
|
|
* primary and secondary.
|
|
*/
|
|
uint32_t min_ack = conn->pack > conn->sack ? conn->sack : conn->pack;
|
|
|
|
pri:
|
|
if (g_queue_is_empty(&conn->primary_list)) {
|
|
return;
|
|
}
|
|
ppkt = g_queue_pop_head(&conn->primary_list);
|
|
sec:
|
|
if (g_queue_is_empty(&conn->secondary_list)) {
|
|
g_queue_push_head(&conn->primary_list, ppkt);
|
|
return;
|
|
}
|
|
spkt = g_queue_pop_head(&conn->secondary_list);
|
|
|
|
if (ppkt->tcp_seq == ppkt->seq_end) {
|
|
colo_release_primary_pkt(s, ppkt);
|
|
ppkt = NULL;
|
|
}
|
|
|
|
if (ppkt && conn->compare_seq && !after(ppkt->seq_end, conn->compare_seq)) {
|
|
trace_colo_compare_main("pri: this packet has compared");
|
|
colo_release_primary_pkt(s, ppkt);
|
|
ppkt = NULL;
|
|
}
|
|
|
|
if (spkt->tcp_seq == spkt->seq_end) {
|
|
packet_destroy(spkt, NULL);
|
|
if (!ppkt) {
|
|
goto pri;
|
|
} else {
|
|
goto sec;
|
|
}
|
|
} else {
|
|
if (conn->compare_seq && !after(spkt->seq_end, conn->compare_seq)) {
|
|
trace_colo_compare_main("sec: this packet has compared");
|
|
packet_destroy(spkt, NULL);
|
|
if (!ppkt) {
|
|
goto pri;
|
|
} else {
|
|
goto sec;
|
|
}
|
|
}
|
|
if (!ppkt) {
|
|
g_queue_push_head(&conn->secondary_list, spkt);
|
|
goto pri;
|
|
}
|
|
}
|
|
|
|
if (colo_mark_tcp_pkt(ppkt, spkt, &mark, min_ack)) {
|
|
trace_colo_compare_tcp_info("pri",
|
|
ppkt->tcp_seq, ppkt->tcp_ack,
|
|
ppkt->header_size, ppkt->payload_size,
|
|
ppkt->offset, ppkt->flags);
|
|
|
|
trace_colo_compare_tcp_info("sec",
|
|
spkt->tcp_seq, spkt->tcp_ack,
|
|
spkt->header_size, spkt->payload_size,
|
|
spkt->offset, spkt->flags);
|
|
|
|
if (mark == COLO_COMPARE_FREE_PRIMARY) {
|
|
conn->compare_seq = ppkt->seq_end;
|
|
colo_release_primary_pkt(s, ppkt);
|
|
g_queue_push_head(&conn->secondary_list, spkt);
|
|
goto pri;
|
|
}
|
|
if (mark == COLO_COMPARE_FREE_SECONDARY) {
|
|
conn->compare_seq = spkt->seq_end;
|
|
packet_destroy(spkt, NULL);
|
|
goto sec;
|
|
}
|
|
if (mark == (COLO_COMPARE_FREE_PRIMARY | COLO_COMPARE_FREE_SECONDARY)) {
|
|
conn->compare_seq = ppkt->seq_end;
|
|
colo_release_primary_pkt(s, ppkt);
|
|
packet_destroy(spkt, NULL);
|
|
goto pri;
|
|
}
|
|
} else {
|
|
g_queue_push_head(&conn->primary_list, ppkt);
|
|
g_queue_push_head(&conn->secondary_list, spkt);
|
|
|
|
if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
|
|
qemu_hexdump((char *)ppkt->data, stderr,
|
|
"colo-compare ppkt", ppkt->size);
|
|
qemu_hexdump((char *)spkt->data, stderr,
|
|
"colo-compare spkt", spkt->size);
|
|
}
|
|
|
|
colo_compare_inconsistency_notify(s);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare udp packet
|
|
*/
|
|
static int colo_packet_compare_udp(Packet *spkt, Packet *ppkt)
|
|
{
|
|
uint16_t network_header_length = ppkt->ip->ip_hl << 2;
|
|
uint16_t offset = network_header_length + ETH_HLEN + ppkt->vnet_hdr_len;
|
|
|
|
trace_colo_compare_main("compare udp");
|
|
|
|
/*
|
|
* Because of ppkt and spkt are both in the same connection,
|
|
* The ppkt's src ip, dst ip, src port, dst port, ip_proto all are
|
|
* same with spkt. In addition, IP header's Identification is a random
|
|
* field, we can handle it in IP fragmentation function later.
|
|
* COLO just concern the response net packet payload from primary guest
|
|
* and secondary guest are same or not, So we ignored all IP header include
|
|
* other field like TOS,TTL,IP Checksum. we only need to compare
|
|
* the ip payload here.
|
|
*/
|
|
if (ppkt->size != spkt->size) {
|
|
trace_colo_compare_main("UDP: payload size of packets are different");
|
|
return -1;
|
|
}
|
|
if (colo_compare_packet_payload(ppkt, spkt, offset, offset,
|
|
ppkt->size - offset)) {
|
|
trace_colo_compare_udp_miscompare("primary pkt size", ppkt->size);
|
|
trace_colo_compare_udp_miscompare("Secondary pkt size", spkt->size);
|
|
if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
|
|
qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt",
|
|
ppkt->size);
|
|
qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt",
|
|
spkt->size);
|
|
}
|
|
return -1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare icmp packet
|
|
*/
|
|
static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt)
|
|
{
|
|
uint16_t network_header_length = ppkt->ip->ip_hl << 2;
|
|
uint16_t offset = network_header_length + ETH_HLEN + ppkt->vnet_hdr_len;
|
|
|
|
trace_colo_compare_main("compare icmp");
|
|
|
|
/*
|
|
* Because of ppkt and spkt are both in the same connection,
|
|
* The ppkt's src ip, dst ip, src port, dst port, ip_proto all are
|
|
* same with spkt. In addition, IP header's Identification is a random
|
|
* field, we can handle it in IP fragmentation function later.
|
|
* COLO just concern the response net packet payload from primary guest
|
|
* and secondary guest are same or not, So we ignored all IP header include
|
|
* other field like TOS,TTL,IP Checksum. we only need to compare
|
|
* the ip payload here.
|
|
*/
|
|
if (ppkt->size != spkt->size) {
|
|
trace_colo_compare_main("ICMP: payload size of packets are different");
|
|
return -1;
|
|
}
|
|
if (colo_compare_packet_payload(ppkt, spkt, offset, offset,
|
|
ppkt->size - offset)) {
|
|
trace_colo_compare_icmp_miscompare("primary pkt size",
|
|
ppkt->size);
|
|
trace_colo_compare_icmp_miscompare("Secondary pkt size",
|
|
spkt->size);
|
|
if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
|
|
qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt",
|
|
ppkt->size);
|
|
qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt",
|
|
spkt->size);
|
|
}
|
|
return -1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare other packet
|
|
*/
|
|
static int colo_packet_compare_other(Packet *spkt, Packet *ppkt)
|
|
{
|
|
uint16_t offset = ppkt->vnet_hdr_len;
|
|
|
|
trace_colo_compare_main("compare other");
|
|
if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
|
|
char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20];
|
|
|
|
strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src));
|
|
strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst));
|
|
strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src));
|
|
strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst));
|
|
|
|
trace_colo_compare_ip_info(ppkt->size, pri_ip_src,
|
|
pri_ip_dst, spkt->size,
|
|
sec_ip_src, sec_ip_dst);
|
|
}
|
|
|
|
if (ppkt->size != spkt->size) {
|
|
trace_colo_compare_main("Other: payload size of packets are different");
|
|
return -1;
|
|
}
|
|
return colo_compare_packet_payload(ppkt, spkt, offset, offset,
|
|
ppkt->size - offset);
|
|
}
|
|
|
|
static int colo_old_packet_check_one(Packet *pkt, int64_t *check_time)
|
|
{
|
|
int64_t now = qemu_clock_get_ms(QEMU_CLOCK_HOST);
|
|
|
|
if ((now - pkt->creation_ms) > (*check_time)) {
|
|
trace_colo_old_packet_check_found(pkt->creation_ms);
|
|
return 0;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
void colo_compare_register_notifier(Notifier *notify)
|
|
{
|
|
notifier_list_add(&colo_compare_notifiers, notify);
|
|
}
|
|
|
|
void colo_compare_unregister_notifier(Notifier *notify)
|
|
{
|
|
notifier_remove(notify);
|
|
}
|
|
|
|
static int colo_old_packet_check_one_conn(Connection *conn,
|
|
CompareState *s)
|
|
{
|
|
GList *result = NULL;
|
|
|
|
result = g_queue_find_custom(&conn->primary_list,
|
|
&s->compare_timeout,
|
|
(GCompareFunc)colo_old_packet_check_one);
|
|
|
|
if (result) {
|
|
/* Do checkpoint will flush old packet */
|
|
colo_compare_inconsistency_notify(s);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Look for old packets that the secondary hasn't matched,
|
|
* if we have some then we have to checkpoint to wake
|
|
* the secondary up.
|
|
*/
|
|
static void colo_old_packet_check(void *opaque)
|
|
{
|
|
CompareState *s = opaque;
|
|
|
|
/*
|
|
* If we find one old packet, stop finding job and notify
|
|
* COLO frame do checkpoint.
|
|
*/
|
|
g_queue_find_custom(&s->conn_list, s,
|
|
(GCompareFunc)colo_old_packet_check_one_conn);
|
|
}
|
|
|
|
static void colo_compare_packet(CompareState *s, Connection *conn,
|
|
int (*HandlePacket)(Packet *spkt,
|
|
Packet *ppkt))
|
|
{
|
|
Packet *pkt = NULL;
|
|
GList *result = NULL;
|
|
|
|
while (!g_queue_is_empty(&conn->primary_list) &&
|
|
!g_queue_is_empty(&conn->secondary_list)) {
|
|
pkt = g_queue_pop_head(&conn->primary_list);
|
|
result = g_queue_find_custom(&conn->secondary_list,
|
|
pkt, (GCompareFunc)HandlePacket);
|
|
|
|
if (result) {
|
|
colo_release_primary_pkt(s, pkt);
|
|
g_queue_remove(&conn->secondary_list, result->data);
|
|
} else {
|
|
/*
|
|
* If one packet arrive late, the secondary_list or
|
|
* primary_list will be empty, so we can't compare it
|
|
* until next comparison. If the packets in the list are
|
|
* timeout, it will trigger a checkpoint request.
|
|
*/
|
|
trace_colo_compare_main("packet different");
|
|
g_queue_push_head(&conn->primary_list, pkt);
|
|
|
|
colo_compare_inconsistency_notify(s);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare packet with secondary list of the
|
|
* specified connection when a new packet was
|
|
* queued to it.
|
|
*/
|
|
static void colo_compare_connection(void *opaque, void *user_data)
|
|
{
|
|
CompareState *s = user_data;
|
|
Connection *conn = opaque;
|
|
|
|
switch (conn->ip_proto) {
|
|
case IPPROTO_TCP:
|
|
colo_compare_tcp(s, conn);
|
|
break;
|
|
case IPPROTO_UDP:
|
|
colo_compare_packet(s, conn, colo_packet_compare_udp);
|
|
break;
|
|
case IPPROTO_ICMP:
|
|
colo_compare_packet(s, conn, colo_packet_compare_icmp);
|
|
break;
|
|
default:
|
|
colo_compare_packet(s, conn, colo_packet_compare_other);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void coroutine_fn _compare_chr_send(void *opaque)
|
|
{
|
|
SendCo *sendco = opaque;
|
|
CompareState *s = sendco->s;
|
|
int ret = 0;
|
|
|
|
while (!g_queue_is_empty(&sendco->send_list)) {
|
|
SendEntry *entry = g_queue_pop_tail(&sendco->send_list);
|
|
uint32_t len = htonl(entry->size);
|
|
|
|
ret = qemu_chr_fe_write_all(sendco->chr, (uint8_t *)&len, sizeof(len));
|
|
|
|
if (ret != sizeof(len)) {
|
|
g_free(entry->buf);
|
|
g_slice_free(SendEntry, entry);
|
|
goto err;
|
|
}
|
|
|
|
if (!sendco->notify_remote_frame && s->vnet_hdr) {
|
|
/*
|
|
* We send vnet header len make other module(like filter-redirector)
|
|
* know how to parse net packet correctly.
|
|
*/
|
|
len = htonl(entry->vnet_hdr_len);
|
|
|
|
ret = qemu_chr_fe_write_all(sendco->chr,
|
|
(uint8_t *)&len,
|
|
sizeof(len));
|
|
|
|
if (ret != sizeof(len)) {
|
|
g_free(entry->buf);
|
|
g_slice_free(SendEntry, entry);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
ret = qemu_chr_fe_write_all(sendco->chr,
|
|
(uint8_t *)entry->buf,
|
|
entry->size);
|
|
|
|
if (ret != entry->size) {
|
|
g_free(entry->buf);
|
|
g_slice_free(SendEntry, entry);
|
|
goto err;
|
|
}
|
|
|
|
g_free(entry->buf);
|
|
g_slice_free(SendEntry, entry);
|
|
}
|
|
|
|
sendco->ret = 0;
|
|
goto out;
|
|
|
|
err:
|
|
while (!g_queue_is_empty(&sendco->send_list)) {
|
|
SendEntry *entry = g_queue_pop_tail(&sendco->send_list);
|
|
g_free(entry->buf);
|
|
g_slice_free(SendEntry, entry);
|
|
}
|
|
sendco->ret = ret < 0 ? ret : -EIO;
|
|
out:
|
|
sendco->co = NULL;
|
|
sendco->done = true;
|
|
aio_wait_kick();
|
|
}
|
|
|
|
static int compare_chr_send(CompareState *s,
|
|
uint8_t *buf,
|
|
uint32_t size,
|
|
uint32_t vnet_hdr_len,
|
|
bool notify_remote_frame,
|
|
bool zero_copy)
|
|
{
|
|
SendCo *sendco;
|
|
SendEntry *entry;
|
|
|
|
if (notify_remote_frame) {
|
|
sendco = &s->notify_sendco;
|
|
} else {
|
|
sendco = &s->out_sendco;
|
|
}
|
|
|
|
if (!size) {
|
|
return 0;
|
|
}
|
|
|
|
entry = g_slice_new(SendEntry);
|
|
entry->size = size;
|
|
entry->vnet_hdr_len = vnet_hdr_len;
|
|
if (zero_copy) {
|
|
entry->buf = buf;
|
|
} else {
|
|
entry->buf = g_malloc(size);
|
|
memcpy(entry->buf, buf, size);
|
|
}
|
|
g_queue_push_head(&sendco->send_list, entry);
|
|
|
|
if (sendco->done) {
|
|
sendco->co = qemu_coroutine_create(_compare_chr_send, sendco);
|
|
sendco->done = false;
|
|
qemu_coroutine_enter(sendco->co);
|
|
if (sendco->done) {
|
|
/* report early errors */
|
|
return sendco->ret;
|
|
}
|
|
}
|
|
|
|
/* assume success */
|
|
return 0;
|
|
}
|
|
|
|
static int compare_chr_can_read(void *opaque)
|
|
{
|
|
return COMPARE_READ_LEN_MAX;
|
|
}
|
|
|
|
/*
|
|
* Called from the main thread on the primary for packets
|
|
* arriving over the socket from the primary.
|
|
*/
|
|
static void compare_pri_chr_in(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
CompareState *s = COLO_COMPARE(opaque);
|
|
int ret;
|
|
|
|
ret = net_fill_rstate(&s->pri_rs, buf, size);
|
|
if (ret == -1) {
|
|
qemu_chr_fe_set_handlers(&s->chr_pri_in, NULL, NULL, NULL, NULL,
|
|
NULL, NULL, true);
|
|
error_report("colo-compare primary_in error");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the main thread on the primary for packets
|
|
* arriving over the socket from the secondary.
|
|
*/
|
|
static void compare_sec_chr_in(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
CompareState *s = COLO_COMPARE(opaque);
|
|
int ret;
|
|
|
|
ret = net_fill_rstate(&s->sec_rs, buf, size);
|
|
if (ret == -1) {
|
|
qemu_chr_fe_set_handlers(&s->chr_sec_in, NULL, NULL, NULL, NULL,
|
|
NULL, NULL, true);
|
|
error_report("colo-compare secondary_in error");
|
|
}
|
|
}
|
|
|
|
static void compare_notify_chr(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
CompareState *s = COLO_COMPARE(opaque);
|
|
int ret;
|
|
|
|
ret = net_fill_rstate(&s->notify_rs, buf, size);
|
|
if (ret == -1) {
|
|
qemu_chr_fe_set_handlers(&s->chr_notify_dev, NULL, NULL, NULL, NULL,
|
|
NULL, NULL, true);
|
|
error_report("colo-compare notify_dev error");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check old packet regularly so it can watch for any packets
|
|
* that the secondary hasn't produced equivalents of.
|
|
*/
|
|
static void check_old_packet_regular(void *opaque)
|
|
{
|
|
CompareState *s = opaque;
|
|
|
|
/* if have old packet we will notify checkpoint */
|
|
colo_old_packet_check(s);
|
|
timer_mod(s->packet_check_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
|
|
s->expired_scan_cycle);
|
|
}
|
|
|
|
/* Public API, Used for COLO frame to notify compare event */
|
|
void colo_notify_compares_event(void *opaque, int event, Error **errp)
|
|
{
|
|
CompareState *s;
|
|
qemu_mutex_lock(&colo_compare_mutex);
|
|
|
|
if (!colo_compare_active) {
|
|
qemu_mutex_unlock(&colo_compare_mutex);
|
|
return;
|
|
}
|
|
|
|
qemu_mutex_lock(&event_mtx);
|
|
QTAILQ_FOREACH(s, &net_compares, next) {
|
|
s->event = event;
|
|
qemu_bh_schedule(s->event_bh);
|
|
event_unhandled_count++;
|
|
}
|
|
/* Wait all compare threads to finish handling this event */
|
|
while (event_unhandled_count > 0) {
|
|
qemu_cond_wait(&event_complete_cond, &event_mtx);
|
|
}
|
|
|
|
qemu_mutex_unlock(&event_mtx);
|
|
qemu_mutex_unlock(&colo_compare_mutex);
|
|
}
|
|
|
|
static void colo_compare_timer_init(CompareState *s)
|
|
{
|
|
AioContext *ctx = iothread_get_aio_context(s->iothread);
|
|
|
|
s->packet_check_timer = aio_timer_new(ctx, QEMU_CLOCK_VIRTUAL,
|
|
SCALE_MS, check_old_packet_regular,
|
|
s);
|
|
timer_mod(s->packet_check_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
|
|
s->expired_scan_cycle);
|
|
}
|
|
|
|
static void colo_compare_timer_del(CompareState *s)
|
|
{
|
|
if (s->packet_check_timer) {
|
|
timer_del(s->packet_check_timer);
|
|
timer_free(s->packet_check_timer);
|
|
s->packet_check_timer = NULL;
|
|
}
|
|
}
|
|
|
|
static void colo_flush_packets(void *opaque, void *user_data);
|
|
|
|
static void colo_compare_handle_event(void *opaque)
|
|
{
|
|
CompareState *s = opaque;
|
|
|
|
switch (s->event) {
|
|
case COLO_EVENT_CHECKPOINT:
|
|
g_queue_foreach(&s->conn_list, colo_flush_packets, s);
|
|
break;
|
|
case COLO_EVENT_FAILOVER:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
qemu_mutex_lock(&event_mtx);
|
|
assert(event_unhandled_count > 0);
|
|
event_unhandled_count--;
|
|
qemu_cond_broadcast(&event_complete_cond);
|
|
qemu_mutex_unlock(&event_mtx);
|
|
}
|
|
|
|
static void colo_compare_iothread(CompareState *s)
|
|
{
|
|
AioContext *ctx = iothread_get_aio_context(s->iothread);
|
|
object_ref(OBJECT(s->iothread));
|
|
s->worker_context = iothread_get_g_main_context(s->iothread);
|
|
|
|
qemu_chr_fe_set_handlers(&s->chr_pri_in, compare_chr_can_read,
|
|
compare_pri_chr_in, NULL, NULL,
|
|
s, s->worker_context, true);
|
|
qemu_chr_fe_set_handlers(&s->chr_sec_in, compare_chr_can_read,
|
|
compare_sec_chr_in, NULL, NULL,
|
|
s, s->worker_context, true);
|
|
if (s->notify_dev) {
|
|
qemu_chr_fe_set_handlers(&s->chr_notify_dev, compare_chr_can_read,
|
|
compare_notify_chr, NULL, NULL,
|
|
s, s->worker_context, true);
|
|
}
|
|
|
|
colo_compare_timer_init(s);
|
|
s->event_bh = aio_bh_new(ctx, colo_compare_handle_event, s);
|
|
}
|
|
|
|
static char *compare_get_pri_indev(Object *obj, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
return g_strdup(s->pri_indev);
|
|
}
|
|
|
|
static void compare_set_pri_indev(Object *obj, const char *value, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
g_free(s->pri_indev);
|
|
s->pri_indev = g_strdup(value);
|
|
}
|
|
|
|
static char *compare_get_sec_indev(Object *obj, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
return g_strdup(s->sec_indev);
|
|
}
|
|
|
|
static void compare_set_sec_indev(Object *obj, const char *value, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
g_free(s->sec_indev);
|
|
s->sec_indev = g_strdup(value);
|
|
}
|
|
|
|
static char *compare_get_outdev(Object *obj, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
return g_strdup(s->outdev);
|
|
}
|
|
|
|
static void compare_set_outdev(Object *obj, const char *value, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
g_free(s->outdev);
|
|
s->outdev = g_strdup(value);
|
|
}
|
|
|
|
static bool compare_get_vnet_hdr(Object *obj, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
return s->vnet_hdr;
|
|
}
|
|
|
|
static void compare_set_vnet_hdr(Object *obj,
|
|
bool value,
|
|
Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
s->vnet_hdr = value;
|
|
}
|
|
|
|
static char *compare_get_notify_dev(Object *obj, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
return g_strdup(s->notify_dev);
|
|
}
|
|
|
|
static void compare_set_notify_dev(Object *obj, const char *value, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
g_free(s->notify_dev);
|
|
s->notify_dev = g_strdup(value);
|
|
}
|
|
|
|
static void compare_get_timeout(Object *obj, Visitor *v,
|
|
const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
uint32_t value = s->compare_timeout;
|
|
|
|
visit_type_uint32(v, name, &value, errp);
|
|
}
|
|
|
|
static void compare_set_timeout(Object *obj, Visitor *v,
|
|
const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
uint32_t value;
|
|
|
|
if (!visit_type_uint32(v, name, &value, errp)) {
|
|
return;
|
|
}
|
|
if (!value) {
|
|
error_setg(errp, "Property '%s.%s' requires a positive value",
|
|
object_get_typename(obj), name);
|
|
return;
|
|
}
|
|
s->compare_timeout = value;
|
|
}
|
|
|
|
static void compare_get_expired_scan_cycle(Object *obj, Visitor *v,
|
|
const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
uint32_t value = s->expired_scan_cycle;
|
|
|
|
visit_type_uint32(v, name, &value, errp);
|
|
}
|
|
|
|
static void compare_set_expired_scan_cycle(Object *obj, Visitor *v,
|
|
const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
uint32_t value;
|
|
|
|
if (!visit_type_uint32(v, name, &value, errp)) {
|
|
return;
|
|
}
|
|
if (!value) {
|
|
error_setg(errp, "Property '%s.%s' requires a positive value",
|
|
object_get_typename(obj), name);
|
|
return;
|
|
}
|
|
s->expired_scan_cycle = value;
|
|
}
|
|
|
|
static void compare_pri_rs_finalize(SocketReadState *pri_rs)
|
|
{
|
|
CompareState *s = container_of(pri_rs, CompareState, pri_rs);
|
|
Connection *conn = NULL;
|
|
|
|
if (packet_enqueue(s, PRIMARY_IN, &conn)) {
|
|
trace_colo_compare_main("primary: unsupported packet in");
|
|
compare_chr_send(s,
|
|
pri_rs->buf,
|
|
pri_rs->packet_len,
|
|
pri_rs->vnet_hdr_len,
|
|
false,
|
|
false);
|
|
} else {
|
|
/* compare packet in the specified connection */
|
|
colo_compare_connection(conn, s);
|
|
}
|
|
}
|
|
|
|
static void compare_sec_rs_finalize(SocketReadState *sec_rs)
|
|
{
|
|
CompareState *s = container_of(sec_rs, CompareState, sec_rs);
|
|
Connection *conn = NULL;
|
|
|
|
if (packet_enqueue(s, SECONDARY_IN, &conn)) {
|
|
trace_colo_compare_main("secondary: unsupported packet in");
|
|
} else {
|
|
/* compare packet in the specified connection */
|
|
colo_compare_connection(conn, s);
|
|
}
|
|
}
|
|
|
|
static void compare_notify_rs_finalize(SocketReadState *notify_rs)
|
|
{
|
|
CompareState *s = container_of(notify_rs, CompareState, notify_rs);
|
|
|
|
const char msg[] = "COLO_COMPARE_GET_XEN_INIT";
|
|
int ret;
|
|
|
|
if (packet_matches_str("COLO_USERSPACE_PROXY_INIT",
|
|
notify_rs->buf,
|
|
notify_rs->packet_len)) {
|
|
ret = compare_chr_send(s, (uint8_t *)msg, strlen(msg), 0, true, false);
|
|
if (ret < 0) {
|
|
error_report("Notify Xen COLO-frame INIT failed");
|
|
}
|
|
} else if (packet_matches_str("COLO_CHECKPOINT",
|
|
notify_rs->buf,
|
|
notify_rs->packet_len)) {
|
|
/* colo-compare do checkpoint, flush pri packet and remove sec packet */
|
|
g_queue_foreach(&s->conn_list, colo_flush_packets, s);
|
|
} else {
|
|
error_report("COLO compare got unsupported instruction");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return 0 is success.
|
|
* Return 1 is failed.
|
|
*/
|
|
static int find_and_check_chardev(Chardev **chr,
|
|
char *chr_name,
|
|
Error **errp)
|
|
{
|
|
*chr = qemu_chr_find(chr_name);
|
|
if (*chr == NULL) {
|
|
error_setg(errp, "Device '%s' not found",
|
|
chr_name);
|
|
return 1;
|
|
}
|
|
|
|
if (!qemu_chr_has_feature(*chr, QEMU_CHAR_FEATURE_RECONNECTABLE)) {
|
|
error_setg(errp, "chardev \"%s\" is not reconnectable",
|
|
chr_name);
|
|
return 1;
|
|
}
|
|
|
|
if (!qemu_chr_has_feature(*chr, QEMU_CHAR_FEATURE_GCONTEXT)) {
|
|
error_setg(errp, "chardev \"%s\" cannot switch context",
|
|
chr_name);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called from the main thread on the primary
|
|
* to setup colo-compare.
|
|
*/
|
|
static void colo_compare_complete(UserCreatable *uc, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(uc);
|
|
Chardev *chr;
|
|
|
|
if (!s->pri_indev || !s->sec_indev || !s->outdev || !s->iothread) {
|
|
error_setg(errp, "colo compare needs 'primary_in' ,"
|
|
"'secondary_in','outdev','iothread' property set");
|
|
return;
|
|
} else if (!strcmp(s->pri_indev, s->outdev) ||
|
|
!strcmp(s->sec_indev, s->outdev) ||
|
|
!strcmp(s->pri_indev, s->sec_indev)) {
|
|
error_setg(errp, "'indev' and 'outdev' could not be same "
|
|
"for compare module");
|
|
return;
|
|
}
|
|
|
|
if (!s->compare_timeout) {
|
|
/* Set default value to 3000 MS */
|
|
s->compare_timeout = DEFAULT_TIME_OUT_MS;
|
|
}
|
|
|
|
if (!s->expired_scan_cycle) {
|
|
/* Set default value to 3000 MS */
|
|
s->expired_scan_cycle = REGULAR_PACKET_CHECK_MS;
|
|
}
|
|
|
|
if (find_and_check_chardev(&chr, s->pri_indev, errp) ||
|
|
!qemu_chr_fe_init(&s->chr_pri_in, chr, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (find_and_check_chardev(&chr, s->sec_indev, errp) ||
|
|
!qemu_chr_fe_init(&s->chr_sec_in, chr, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (find_and_check_chardev(&chr, s->outdev, errp) ||
|
|
!qemu_chr_fe_init(&s->chr_out, chr, errp)) {
|
|
return;
|
|
}
|
|
|
|
net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize, s->vnet_hdr);
|
|
net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize, s->vnet_hdr);
|
|
|
|
/* Try to enable remote notify chardev, currently just for Xen COLO */
|
|
if (s->notify_dev) {
|
|
if (find_and_check_chardev(&chr, s->notify_dev, errp) ||
|
|
!qemu_chr_fe_init(&s->chr_notify_dev, chr, errp)) {
|
|
return;
|
|
}
|
|
|
|
net_socket_rs_init(&s->notify_rs, compare_notify_rs_finalize,
|
|
s->vnet_hdr);
|
|
}
|
|
|
|
s->out_sendco.s = s;
|
|
s->out_sendco.chr = &s->chr_out;
|
|
s->out_sendco.notify_remote_frame = false;
|
|
s->out_sendco.done = true;
|
|
g_queue_init(&s->out_sendco.send_list);
|
|
|
|
if (s->notify_dev) {
|
|
s->notify_sendco.s = s;
|
|
s->notify_sendco.chr = &s->chr_notify_dev;
|
|
s->notify_sendco.notify_remote_frame = true;
|
|
s->notify_sendco.done = true;
|
|
g_queue_init(&s->notify_sendco.send_list);
|
|
}
|
|
|
|
g_queue_init(&s->conn_list);
|
|
|
|
s->connection_track_table = g_hash_table_new_full(connection_key_hash,
|
|
connection_key_equal,
|
|
g_free,
|
|
connection_destroy);
|
|
|
|
colo_compare_iothread(s);
|
|
|
|
qemu_mutex_lock(&colo_compare_mutex);
|
|
if (!colo_compare_active) {
|
|
qemu_mutex_init(&event_mtx);
|
|
qemu_cond_init(&event_complete_cond);
|
|
colo_compare_active = true;
|
|
}
|
|
QTAILQ_INSERT_TAIL(&net_compares, s, next);
|
|
qemu_mutex_unlock(&colo_compare_mutex);
|
|
|
|
return;
|
|
}
|
|
|
|
static void colo_flush_packets(void *opaque, void *user_data)
|
|
{
|
|
CompareState *s = user_data;
|
|
Connection *conn = opaque;
|
|
Packet *pkt = NULL;
|
|
|
|
while (!g_queue_is_empty(&conn->primary_list)) {
|
|
pkt = g_queue_pop_head(&conn->primary_list);
|
|
compare_chr_send(s,
|
|
pkt->data,
|
|
pkt->size,
|
|
pkt->vnet_hdr_len,
|
|
false,
|
|
true);
|
|
packet_destroy_partial(pkt, NULL);
|
|
}
|
|
while (!g_queue_is_empty(&conn->secondary_list)) {
|
|
pkt = g_queue_pop_head(&conn->secondary_list);
|
|
packet_destroy(pkt, NULL);
|
|
}
|
|
}
|
|
|
|
static void colo_compare_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
|
|
|
|
ucc->complete = colo_compare_complete;
|
|
}
|
|
|
|
static void colo_compare_init(Object *obj)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
object_property_add_str(obj, "primary_in",
|
|
compare_get_pri_indev, compare_set_pri_indev);
|
|
object_property_add_str(obj, "secondary_in",
|
|
compare_get_sec_indev, compare_set_sec_indev);
|
|
object_property_add_str(obj, "outdev",
|
|
compare_get_outdev, compare_set_outdev);
|
|
object_property_add_link(obj, "iothread", TYPE_IOTHREAD,
|
|
(Object **)&s->iothread,
|
|
object_property_allow_set_link,
|
|
OBJ_PROP_LINK_STRONG);
|
|
/* This parameter just for Xen COLO */
|
|
object_property_add_str(obj, "notify_dev",
|
|
compare_get_notify_dev, compare_set_notify_dev);
|
|
|
|
object_property_add(obj, "compare_timeout", "uint32",
|
|
compare_get_timeout,
|
|
compare_set_timeout, NULL, NULL);
|
|
|
|
object_property_add(obj, "expired_scan_cycle", "uint32",
|
|
compare_get_expired_scan_cycle,
|
|
compare_set_expired_scan_cycle, NULL, NULL);
|
|
|
|
s->vnet_hdr = false;
|
|
object_property_add_bool(obj, "vnet_hdr_support", compare_get_vnet_hdr,
|
|
compare_set_vnet_hdr);
|
|
}
|
|
|
|
static void colo_compare_finalize(Object *obj)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
CompareState *tmp = NULL;
|
|
|
|
qemu_mutex_lock(&colo_compare_mutex);
|
|
QTAILQ_FOREACH(tmp, &net_compares, next) {
|
|
if (tmp == s) {
|
|
QTAILQ_REMOVE(&net_compares, s, next);
|
|
break;
|
|
}
|
|
}
|
|
if (QTAILQ_EMPTY(&net_compares)) {
|
|
colo_compare_active = false;
|
|
qemu_mutex_destroy(&event_mtx);
|
|
qemu_cond_destroy(&event_complete_cond);
|
|
}
|
|
qemu_mutex_unlock(&colo_compare_mutex);
|
|
|
|
qemu_chr_fe_deinit(&s->chr_pri_in, false);
|
|
qemu_chr_fe_deinit(&s->chr_sec_in, false);
|
|
qemu_chr_fe_deinit(&s->chr_out, false);
|
|
if (s->notify_dev) {
|
|
qemu_chr_fe_deinit(&s->chr_notify_dev, false);
|
|
}
|
|
|
|
if (s->iothread) {
|
|
colo_compare_timer_del(s);
|
|
}
|
|
|
|
qemu_bh_delete(s->event_bh);
|
|
|
|
AioContext *ctx = iothread_get_aio_context(s->iothread);
|
|
aio_context_acquire(ctx);
|
|
AIO_WAIT_WHILE(ctx, !s->out_sendco.done);
|
|
if (s->notify_dev) {
|
|
AIO_WAIT_WHILE(ctx, !s->notify_sendco.done);
|
|
}
|
|
aio_context_release(ctx);
|
|
|
|
/* Release all unhandled packets after compare thead exited */
|
|
g_queue_foreach(&s->conn_list, colo_flush_packets, s);
|
|
AIO_WAIT_WHILE(NULL, !s->out_sendco.done);
|
|
|
|
g_queue_clear(&s->conn_list);
|
|
g_queue_clear(&s->out_sendco.send_list);
|
|
if (s->notify_dev) {
|
|
g_queue_clear(&s->notify_sendco.send_list);
|
|
}
|
|
|
|
if (s->connection_track_table) {
|
|
g_hash_table_destroy(s->connection_track_table);
|
|
}
|
|
|
|
if (s->iothread) {
|
|
object_unref(OBJECT(s->iothread));
|
|
}
|
|
|
|
g_free(s->pri_indev);
|
|
g_free(s->sec_indev);
|
|
g_free(s->outdev);
|
|
g_free(s->notify_dev);
|
|
}
|
|
|
|
static void __attribute__((__constructor__)) colo_compare_init_globals(void)
|
|
{
|
|
colo_compare_active = false;
|
|
qemu_mutex_init(&colo_compare_mutex);
|
|
}
|
|
|
|
static const TypeInfo colo_compare_info = {
|
|
.name = TYPE_COLO_COMPARE,
|
|
.parent = TYPE_OBJECT,
|
|
.instance_size = sizeof(CompareState),
|
|
.instance_init = colo_compare_init,
|
|
.instance_finalize = colo_compare_finalize,
|
|
.class_size = sizeof(CompareClass),
|
|
.class_init = colo_compare_class_init,
|
|
.interfaces = (InterfaceInfo[]) {
|
|
{ TYPE_USER_CREATABLE },
|
|
{ }
|
|
}
|
|
};
|
|
|
|
static void register_types(void)
|
|
{
|
|
type_register_static(&colo_compare_info);
|
|
}
|
|
|
|
type_init(register_types);
|