You need to sign in or sign up before continuing.
virnetdevmacvlan.c 37.5 KB
Newer Older
1
/*
2
 * Copyright (C) 2010-2012 Red Hat, Inc.
3
 * Copyright (C) 2010-2012 IBM Corporation
4 5 6 7 8 9 10 11 12 13 14 15
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
16
 * License along with this library.  If not, see
O
Osier Yang 已提交
17
 * <http://www.gnu.org/licenses/>.
18 19 20 21 22 23 24 25 26 27 28 29 30
 *
 * Authors:
 *     Stefan Berger <stefanb@us.ibm.com>
 *
 * Notes:
 * netlink: http://lovezutto.googlepages.com/netlink.pdf
 *          iproute2 package
 *
 */

#include <config.h>

#include "virnetdevmacvlan.h"
31
#include "virmacaddr.h"
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62
#include "util.h"
#include "virterror_internal.h"

#define VIR_FROM_THIS VIR_FROM_NET

VIR_ENUM_IMPL(virNetDevMacVLanMode, VIR_NETDEV_MACVLAN_MODE_LAST,
              "vepa",
              "private",
              "bridge",
              "passthrough")

#if WITH_MACVTAP
# include <stdint.h>
# include <stdio.h>
# include <errno.h>
# include <fcntl.h>
# include <sys/socket.h>
# include <sys/ioctl.h>

# include <linux/if.h>
# include <linux/if_tun.h>

/* Older kernels lacked this enum value.  */
# if !HAVE_DECL_MACVLAN_MODE_PASSTHRU
#  define MACVLAN_MODE_PASSTHRU 8
# endif

# include "memory.h"
# include "logging.h"
# include "uuid.h"
# include "virfile.h"
63
# include "virnetlink.h"
64
# include "virnetdev.h"
65 66
# include "virpidfile.h"

67 68 69 70

# define MACVTAP_NAME_PREFIX	"macvtap"
# define MACVTAP_NAME_PATTERN	"macvtap%d"

71 72 73
# define MACVLAN_NAME_PREFIX	"macvlan"
# define MACVLAN_NAME_PATTERN	"macvlan%d"

74 75 76 77
/**
 * virNetDevMacVLanCreate:
 *
 * @ifname: The name the interface is supposed to have; optional parameter
78
 * @type: The type of device, i.e., "macvtap", "macvlan"
79 80 81 82 83 84 85 86 87 88 89 90 91 92
 * @macaddress: The MAC address of the device
 * @srcdev: The name of the 'link' device
 * @macvlan_mode: The macvlan mode to use
 * @retry: Pointer to integer that will be '1' upon return if an interface
 *         with the same name already exists and it is worth to try
 *         again with a different name
 *
 * Create a macvtap device with the given properties.
 *
 * Returns 0 on success, -1 on fatal error.
 */
int
virNetDevMacVLanCreate(const char *ifname,
                       const char *type,
93
                       const virMacAddrPtr macaddress,
94 95 96 97
                       const char *srcdev,
                       uint32_t macvlan_mode,
                       int *retry)
{
98
    int rc = -1;
99 100 101 102 103 104 105 106 107
    struct nlmsghdr *resp;
    struct nlmsgerr *err;
    struct ifinfomsg ifinfo = { .ifi_family = AF_UNSPEC };
    int ifindex;
    unsigned char *recvbuf = NULL;
    unsigned int recvbuflen;
    struct nl_msg *nl_msg;
    struct nlattr *linkinfo, *info_data;

108
    if (virNetDevGetIndex(srcdev, &ifindex) < 0)
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
        return -1;

    *retry = 0;

    nl_msg = nlmsg_alloc_simple(RTM_NEWLINK,
                                NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
    if (!nl_msg) {
        virReportOOMError();
        return -1;
    }

    if (nlmsg_append(nl_msg,  &ifinfo, sizeof(ifinfo), NLMSG_ALIGNTO) < 0)
        goto buffer_too_small;

    if (nla_put_u32(nl_msg, IFLA_LINK, ifindex) < 0)
        goto buffer_too_small;

    if (nla_put(nl_msg, IFLA_ADDRESS, VIR_MAC_BUFLEN, macaddress) < 0)
        goto buffer_too_small;

    if (ifname &&
        nla_put(nl_msg, IFLA_IFNAME, strlen(ifname)+1, ifname) < 0)
        goto buffer_too_small;

    if (!(linkinfo = nla_nest_start(nl_msg, IFLA_LINKINFO)))
        goto buffer_too_small;

    if (nla_put(nl_msg, IFLA_INFO_KIND, strlen(type), type) < 0)
        goto buffer_too_small;

    if (macvlan_mode > 0) {
        if (!(info_data = nla_nest_start(nl_msg, IFLA_INFO_DATA)))
            goto buffer_too_small;

        if (nla_put(nl_msg, IFLA_MACVLAN_MODE, sizeof(macvlan_mode),
                    &macvlan_mode) < 0)
            goto buffer_too_small;

        nla_nest_end(nl_msg, info_data);
    }

    nla_nest_end(nl_msg, linkinfo);

152 153
    if (virNetlinkCommand(nl_msg, &recvbuf, &recvbuflen, 0, 0,
                          NETLINK_ROUTE, 0) < 0) {
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174
        goto cleanup;
    }

    if (recvbuflen < NLMSG_LENGTH(0) || recvbuf == NULL)
        goto malformed_resp;

    resp = (struct nlmsghdr *)recvbuf;

    switch (resp->nlmsg_type) {
    case NLMSG_ERROR:
        err = (struct nlmsgerr *)NLMSG_DATA(resp);
        if (resp->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
            goto malformed_resp;

        switch (err->error) {

        case 0:
            break;

        case -EEXIST:
            *retry = 1;
175
            goto cleanup;
176 177 178 179 180

        default:
            virReportSystemError(-err->error,
                                 _("error creating %s type of interface"),
                                 type);
181
            goto cleanup;
182 183 184 185 186 187 188 189 190 191
        }
        break;

    case NLMSG_DONE:
        break;

    default:
        goto malformed_resp;
    }

192
    rc = 0;
193 194 195 196 197 198
cleanup:
    nlmsg_free(nl_msg);
    VIR_FREE(recvbuf);
    return rc;

malformed_resp:
199
    virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
200
                   _("malformed netlink response message"));
201
    goto cleanup;
202 203

buffer_too_small:
204
    virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
205
                   _("allocated netlink buffer is too small"));
206
    goto cleanup;
207 208 209 210 211 212 213 214 215 216 217 218 219
}

/**
 * virNetDevMacVLanDelete:
 *
 * @ifname: Name of the interface
 *
 * Tear down an interface with the given name.
 *
 * Returns 0 on success, -1 on fatal error.
 */
int virNetDevMacVLanDelete(const char *ifname)
{
220
    int rc = -1;
221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240
    struct nlmsghdr *resp;
    struct nlmsgerr *err;
    struct ifinfomsg ifinfo = { .ifi_family = AF_UNSPEC };
    unsigned char *recvbuf = NULL;
    unsigned int recvbuflen;
    struct nl_msg *nl_msg;

    nl_msg = nlmsg_alloc_simple(RTM_DELLINK,
                                NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
    if (!nl_msg) {
        virReportOOMError();
        return -1;
    }

    if (nlmsg_append(nl_msg,  &ifinfo, sizeof(ifinfo), NLMSG_ALIGNTO) < 0)
        goto buffer_too_small;

    if (nla_put(nl_msg, IFLA_IFNAME, strlen(ifname)+1, ifname) < 0)
        goto buffer_too_small;

241 242
    if (virNetlinkCommand(nl_msg, &recvbuf, &recvbuflen, 0, 0,
                          NETLINK_ROUTE, 0) < 0) {
243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260
        goto cleanup;
    }

    if (recvbuflen < NLMSG_LENGTH(0) || recvbuf == NULL)
        goto malformed_resp;

    resp = (struct nlmsghdr *)recvbuf;

    switch (resp->nlmsg_type) {
    case NLMSG_ERROR:
        err = (struct nlmsgerr *)NLMSG_DATA(resp);
        if (resp->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
            goto malformed_resp;

        if (err->error) {
            virReportSystemError(-err->error,
                                 _("error destroying %s interface"),
                                 ifname);
261
            goto cleanup;
262 263 264 265 266 267 268 269 270 271
        }
        break;

    case NLMSG_DONE:
        break;

    default:
        goto malformed_resp;
    }

272
    rc = 0;
273 274 275 276 277 278
cleanup:
    nlmsg_free(nl_msg);
    VIR_FREE(recvbuf);
    return rc;

malformed_resp:
279
    virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
280
                   _("malformed netlink response message"));
281
    goto cleanup;
282 283

buffer_too_small:
284
    virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
285
                   _("allocated netlink buffer is too small"));
286
    goto cleanup;
287 288 289
}


290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430
/**
 * virNetDevMacVLanTapOpen:
 * Open the macvtap's tap device.
 * @ifname: Name of the macvtap interface
 * @retries : Number of retries in case udev for example may need to be
 *            waited for to create the tap chardev
 * Returns negative value in case of error, the file descriptor otherwise.
 */
static
int virNetDevMacVLanTapOpen(const char *ifname,
                            int retries)
{
    FILE *file;
    char path[64];
    int ifindex;
    char tapname[50];
    int tapfd;

    if (snprintf(path, sizeof(path),
                 "/sys/class/net/%s/ifindex", ifname) >= sizeof(path)) {
        virReportSystemError(errno,
                             "%s",
                             _("buffer for ifindex path is too small"));
        return -1;
    }

    file = fopen(path, "r");

    if (!file) {
        virReportSystemError(errno,
                             _("cannot open macvtap file %s to determine "
                               "interface index"), path);
        return -1;
    }

    if (fscanf(file, "%d", &ifindex) != 1) {
        virReportSystemError(errno,
                             "%s",_("cannot determine macvtap's tap device "
                             "interface index"));
        VIR_FORCE_FCLOSE(file);
        return -1;
    }

    VIR_FORCE_FCLOSE(file);

    if (snprintf(tapname, sizeof(tapname),
                 "/dev/tap%d", ifindex) >= sizeof(tapname)) {
        virReportSystemError(errno,
                             "%s",
                             _("internal buffer for tap device is too small"));
        return -1;
    }

    while (1) {
        /* may need to wait for udev to be done */
        tapfd = open(tapname, O_RDWR);
        if (tapfd < 0 && retries > 0) {
            retries--;
            usleep(20000);
            continue;
        }
        break;
    }

    if (tapfd < 0)
        virReportSystemError(errno,
                             _("cannot open macvtap tap device %s"),
                             tapname);

    return tapfd;
}


/**
 * virNetDevMacVLanTapSetup:
 * @tapfd: file descriptor of the macvtap tap
 * @vnet_hdr: 1 to enable IFF_VNET_HDR, 0 to disable it
 *
 * Returns 0 on success, -1 in case of fatal error, error code otherwise.
 *
 * Turn the IFF_VNET_HDR flag, if requested and available, make sure
 * it's off in the other cases.
 * A fatal error is defined as the VNET_HDR flag being set but it cannot
 * be turned off for some reason. This is reported with -1. Other fatal
 * error is not being able to read the interface flags. In that case the
 * macvtap device should not be used.
 */
static int
virNetDevMacVLanTapSetup(int tapfd, int vnet_hdr)
{
    unsigned int features;
    struct ifreq ifreq;
    short new_flags = 0;
    int rc_on_fail = 0;
    const char *errmsg = NULL;

    memset(&ifreq, 0, sizeof(ifreq));

    if (ioctl(tapfd, TUNGETIFF, &ifreq) < 0) {
        virReportSystemError(errno, "%s",
                             _("cannot get interface flags on macvtap tap"));
        return -1;
    }

    new_flags = ifreq.ifr_flags;

    if ((ifreq.ifr_flags & IFF_VNET_HDR) && !vnet_hdr) {
        new_flags = ifreq.ifr_flags & ~IFF_VNET_HDR;
        rc_on_fail = -1;
        errmsg = _("cannot clean IFF_VNET_HDR flag on macvtap tap");
    } else if ((ifreq.ifr_flags & IFF_VNET_HDR) == 0 && vnet_hdr) {
        if (ioctl(tapfd, TUNGETFEATURES, &features) < 0) {
            virReportSystemError(errno, "%s",
                   _("cannot get feature flags on macvtap tap"));
            return -1;
        }
        if ((features & IFF_VNET_HDR)) {
            new_flags = ifreq.ifr_flags | IFF_VNET_HDR;
            errmsg = _("cannot set IFF_VNET_HDR flag on macvtap tap");
        }
    }

    if (new_flags != ifreq.ifr_flags) {
        ifreq.ifr_flags = new_flags;
        if (ioctl(tapfd, TUNSETIFF, &ifreq) < 0) {
            virReportSystemError(errno, "%s", errmsg);
            return rc_on_fail;
        }
    }

    return 0;
}


static const uint32_t modeMap[VIR_NETDEV_MACVLAN_MODE_LAST] = {
    [VIR_NETDEV_MACVLAN_MODE_VEPA] = MACVLAN_MODE_VEPA,
    [VIR_NETDEV_MACVLAN_MODE_PRIVATE] = MACVLAN_MODE_PRIVATE,
    [VIR_NETDEV_MACVLAN_MODE_BRIDGE] = MACVLAN_MODE_BRIDGE,
    [VIR_NETDEV_MACVLAN_MODE_PASSTHRU] = MACVLAN_MODE_PASSTHRU,
};

431 432 433 434
/* Struct to hold the state and configuration of a 802.1qbg port */
struct virNetlinkCallbackData {
    char *cr_ifname;
    virNetDevVPortProfilePtr virtPortProfile;
435
    virMacAddr macaddress;
436
    char *linkdev;
437
    int vf;
S
Stefan Berger 已提交
438
    unsigned char vmuuid[VIR_UUID_BUFLEN];
439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554
    enum virNetDevVPortProfileOp vmOp;
    unsigned int linkState;
};

typedef struct virNetlinkCallbackData *virNetlinkCallbackDataPtr;

# define INSTANCE_STRLEN 36

static int instance2str(const unsigned char *p, char *dst, size_t size)
{
    if (dst && size > INSTANCE_STRLEN) {
        snprintf(dst, size, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
                 "%02x%02x-%02x%02x%02x%02x%02x%02x",
                 p[0], p[1], p[2], p[3],
                 p[4], p[5], p[6], p[7],
                 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
        return 0;
    }
    return -1;
}

# define LLDPAD_PID_FILE  "/var/run/lldpad.pid"
# define VIRIP_PID_FILE   "/var/run/virip.pid"

/**
 * virNetDevMacVLanVPortProfileCallback:
 *
 * @msg: The buffer containing the received netlink message
 * @length: The length of the received netlink message.
 * @peer: The netling sockaddr containing the peer information
 * @handled: Contains information if the message has been replied to yet
 * @opaque: Contains vital information regarding the associated vm an interface
 *
 * This function is called when a netlink message is received. The function
 * reads the message and responds if it is pertinent to the running VMs
 * network interface.
 */

static void
virNetDevMacVLanVPortProfileCallback(unsigned char *msg,
                                     int length,
                                     struct sockaddr_nl *peer,
                                     bool *handled,
                                     void *opaque)
{
   struct nla_policy ifla_vf_policy[IFLA_VF_MAX + 1] = {
       [IFLA_VF_MAC] = {.minlen = sizeof(struct ifla_vf_mac),
                        .maxlen = sizeof(struct ifla_vf_mac)},
       [IFLA_VF_VLAN] = {.minlen = sizeof(struct ifla_vf_vlan),
                         .maxlen = sizeof(struct ifla_vf_vlan)},
    };

    struct nla_policy ifla_port_policy[IFLA_PORT_MAX + 1] = {
        [IFLA_PORT_RESPONSE] = {.type = NLA_U16},
    };

    struct nlattr *tb[IFLA_MAX + 1], *tb3[IFLA_PORT_MAX + 1],
        *tb_vfinfo[IFLA_VF_MAX + 1], *tb_vfinfo_list;

    struct ifinfomsg ifinfo;
    struct nlmsghdr *hdr;
    void *data;
    int rem;
    char *ifname;
    bool indicate = false;
    virNetlinkCallbackDataPtr calld = opaque;
    pid_t lldpad_pid = 0;
    pid_t virip_pid = 0;

    hdr = (struct nlmsghdr *) msg;
    data = nlmsg_data(hdr);

    /* Quickly decide if we want this or not */

    if (virPidFileReadPath(LLDPAD_PID_FILE, &lldpad_pid) < 0)
        return;

    ignore_value(virPidFileReadPath(VIRIP_PID_FILE, &virip_pid));

    if (hdr->nlmsg_pid != lldpad_pid && hdr->nlmsg_pid != virip_pid)
        return; /* we only care for lldpad and virip messages */
    if (hdr->nlmsg_type != RTM_SETLINK)
        return; /* we only care for RTM_SETLINK */
    if (*handled)
        return; /* if it has been handled - dont handle again */

    /* DEBUG start */
    VIR_INFO("netlink message nl_sockaddr: %p len: %d", peer, length);
    VIR_DEBUG("nlmsg_type  = 0x%02x", hdr->nlmsg_type);
    VIR_DEBUG("nlmsg_len   = 0x%04x", hdr->nlmsg_len);
    VIR_DEBUG("nlmsg_pid   = %d", hdr->nlmsg_pid);
    VIR_DEBUG("nlmsg_seq   = 0x%08x", hdr->nlmsg_seq);
    VIR_DEBUG("nlmsg_flags = 0x%04x", hdr->nlmsg_flags);

    VIR_DEBUG("lldpad pid  = %d", lldpad_pid);

    switch (hdr->nlmsg_type) {
    case RTM_NEWLINK:
    case RTM_DELLINK:
    case RTM_SETLINK:
    case RTM_GETLINK:
        VIR_DEBUG(" IFINFOMSG\n");
        VIR_DEBUG("        ifi_family = 0x%02x\n",
            ((struct ifinfomsg *)data)->ifi_family);
        VIR_DEBUG("        ifi_type   = 0x%x\n",
            ((struct ifinfomsg *)data)->ifi_type);
        VIR_DEBUG("        ifi_index  = %i\n",
            ((struct ifinfomsg *)data)->ifi_index);
        VIR_DEBUG("        ifi_flags  = 0x%04x\n",
            ((struct ifinfomsg *)data)->ifi_flags);
        VIR_DEBUG("        ifi_change = 0x%04x\n",
            ((struct ifinfomsg *)data)->ifi_change);
    }
    /* DEBUG end */

    /* Parse netlink message assume a setlink with vfports */
555
    memcpy(&ifinfo, NLMSG_DATA(hdr), sizeof(ifinfo));
556 557 558
    VIR_DEBUG("family:%#x type:%#x index:%d flags:%#x change:%#x",
        ifinfo.ifi_family, ifinfo.ifi_type, ifinfo.ifi_index,
        ifinfo.ifi_flags, ifinfo.ifi_change);
559
    if (nlmsg_parse(hdr, sizeof(ifinfo),
560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588
        (struct nlattr **)&tb, IFLA_MAX, NULL)) {
        VIR_DEBUG("error parsing request...");
        return;
    }

    if (tb[IFLA_VFINFO_LIST]) {
        VIR_DEBUG("FOUND IFLA_VFINFO_LIST!");

        nla_for_each_nested(tb_vfinfo_list, tb[IFLA_VFINFO_LIST], rem) {
            if (nla_type(tb_vfinfo_list) != IFLA_VF_INFO) {
                VIR_DEBUG("nested parsing of"
                    "IFLA_VFINFO_LIST failed.");
                return;
            }
            if (nla_parse_nested(tb_vfinfo, IFLA_VF_MAX,
                tb_vfinfo_list, ifla_vf_policy)) {
                VIR_DEBUG("nested parsing of "
                    "IFLA_VF_INFO failed.");
                return;
            }
        }

        if (tb_vfinfo[IFLA_VF_MAC]) {
            struct ifla_vf_mac *mac = RTA_DATA(tb_vfinfo[IFLA_VF_MAC]);
            unsigned char *m = mac->mac;

            VIR_DEBUG("IFLA_VF_MAC = %2x:%2x:%2x:%2x:%2x:%2x",
                      m[0], m[1], m[2], m[3], m[4], m[5]);

589
            if (virMacAddrCmpRaw(&calld->macaddress, mac->mac))
590 591 592 593
            {
                /* Repeat the same check for a broadcast mac */
                int i;

594 595
                for (i = 0; i < VIR_MAC_BUFLEN; i++) {
                    if (calld->macaddress.addr[i] != 0xff) {
596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696
                        VIR_DEBUG("MAC address match failed (wasn't broadcast)");
                        return;
                    }
                }
            }
        }

        if (tb_vfinfo[IFLA_VF_VLAN]) {
            struct ifla_vf_vlan *vlan = RTA_DATA(tb_vfinfo[IFLA_VF_VLAN]);

            VIR_DEBUG("IFLA_VF_VLAN = %d", vlan->vlan);
        }
    }

    if (tb[IFLA_IFNAME]) {
        ifname = (char *)RTA_DATA(tb[IFLA_IFNAME]);
        VIR_DEBUG("IFLA_IFNAME = %s\n", ifname);
    }

    if (tb[IFLA_OPERSTATE]) {
        rem = *(unsigned short *)RTA_DATA(tb[IFLA_OPERSTATE]);
        VIR_DEBUG("IFLA_OPERSTATE = %d\n", rem);
    }

    if (tb[IFLA_VF_PORTS]) {
        struct nlattr *tb_vf_ports;

        VIR_DEBUG("found IFLA_VF_PORTS\n");
        nla_for_each_nested(tb_vf_ports, tb[IFLA_VF_PORTS], rem) {

            VIR_DEBUG("iterating\n");
            if (nla_type(tb_vf_ports) != IFLA_VF_PORT) {
                VIR_DEBUG("not a IFLA_VF_PORT. skipping\n");
                continue;
            }
            if (nla_parse_nested(tb3, IFLA_PORT_MAX, tb_vf_ports,
                ifla_port_policy)) {
                VIR_DEBUG("nested parsing on level 2"
                          " failed.");
            }
            if (tb3[IFLA_PORT_VF]) {
                VIR_DEBUG("IFLA_PORT_VF = %d",
                          *(uint32_t *) (RTA_DATA(tb3[IFLA_PORT_VF])));
            }
            if (tb3[IFLA_PORT_PROFILE]) {
                VIR_DEBUG("IFLA_PORT_PROFILE = %s",
                          (char *) RTA_DATA(tb3[IFLA_PORT_PROFILE]));
            }

            if (tb3[IFLA_PORT_VSI_TYPE]) {
                struct ifla_port_vsi *pvsi;
                int tid = 0;

                pvsi = (struct ifla_port_vsi *)
                    RTA_DATA(tb3[IFLA_PORT_VSI_TYPE]);
                tid = ((pvsi->vsi_type_id[2] << 16) |
                       (pvsi->vsi_type_id[1] << 8) |
                       pvsi->vsi_type_id[0]);

                VIR_DEBUG("mgr_id: %d", pvsi->vsi_mgr_id);
                VIR_DEBUG("type_id: %d", tid);
                VIR_DEBUG("type_version: %d",
                          pvsi->vsi_type_version);
            }

            if (tb3[IFLA_PORT_INSTANCE_UUID]) {
                char instance[INSTANCE_STRLEN + 2];
                unsigned char *uuid;

                uuid = (unsigned char *)
                    RTA_DATA(tb3[IFLA_PORT_INSTANCE_UUID]);
                instance2str(uuid, instance, sizeof(instance));
                VIR_DEBUG("IFLA_PORT_INSTANCE_UUID = %s\n",
                          instance);
            }

            if (tb3[IFLA_PORT_REQUEST]) {
                uint8_t req = *(uint8_t *) RTA_DATA(tb3[IFLA_PORT_REQUEST]);
                VIR_DEBUG("IFLA_PORT_REQUEST = %d", req);

                if (req == PORT_REQUEST_DISASSOCIATE) {
                    VIR_DEBUG("Set dissaccociated.");
                    indicate = true;
                }
            }

            if (tb3[IFLA_PORT_RESPONSE]) {
                VIR_DEBUG("IFLA_PORT_RESPONSE = %d\n", *(uint16_t *)
                    RTA_DATA(tb3[IFLA_PORT_RESPONSE]));
            }
        }
    }

    if (!indicate) {
        return;
    }

    VIR_INFO("Re-send 802.1qbg associate request:");
    VIR_INFO("  if: %s", calld->cr_ifname);
    VIR_INFO("  lf: %s", calld->linkdev);
    VIR_INFO(" mac: %02x:%02x:%02x:%02x:%02x:%02x",
697 698 699
             calld->macaddress.addr[0], calld->macaddress.addr[1],
             calld->macaddress.addr[2], calld->macaddress.addr[3],
             calld->macaddress.addr[4], calld->macaddress.addr[5]);
700 701 702

    ignore_value(virNetDevVPortProfileAssociate(calld->cr_ifname,
                                                calld->virtPortProfile,
703
                                                &calld->macaddress,
704
                                                calld->linkdev,
705
                                                calld->vf,
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745
                                                calld->vmuuid,
                                                calld->vmOp, true));
    *handled = true;
    return;
}

/**
 * virNetlinkCallbackDataFree
 *
 * @calld: pointer to a virNetlinkCallbackData object to free
 *
 * This function frees all the data associated with a virNetlinkCallbackData object
 * as well as the object itself. If called with NULL, it does nothing.
 *
 * Returns nothing.
 */
static void
virNetlinkCallbackDataFree(virNetlinkCallbackDataPtr calld)
{
    if (calld) {
        VIR_FREE(calld->cr_ifname);
        VIR_FREE(calld->virtPortProfile);
        VIR_FREE(calld->linkdev);
    }
    VIR_FREE(calld);
}

/**
 * virNetDevMacVLanVPortProfileDestroyCallback:
 *
 * @watch: watch whose handle to remove
 * @macaddr: macaddr whose handle to remove
 * @opaque: Contains vital information regarding the associated vm
 *
 * This function is called when a netlink message handler is terminated.
 * The function frees locally allocated data referenced in the opaque
 * data, and the opaque object itself.
 */
static void
virNetDevMacVLanVPortProfileDestroyCallback(int watch ATTRIBUTE_UNUSED,
746
                                            const virMacAddrPtr macaddr ATTRIBUTE_UNUSED,
747 748 749 750 751
                                            void *opaque)
{
    virNetlinkCallbackDataFree((virNetlinkCallbackDataPtr)opaque);
}

752
int
753
virNetDevMacVLanVPortProfileRegisterCallback(const char *ifname,
754
                                             const virMacAddrPtr macaddress,
755 756 757 758 759 760 761
                                             const char *linkdev,
                                             const unsigned char *vmuuid,
                                             virNetDevVPortProfilePtr virtPortProfile,
                                             enum virNetDevVPortProfileOp vmOp)
{
    virNetlinkCallbackDataPtr calld = NULL;

762
    if (virtPortProfile && virNetlinkEventServiceIsRunning(NETLINK_ROUTE)) {
763 764 765 766 767 768 769
        if (VIR_ALLOC(calld) < 0)
            goto memory_error;
        if ((calld->cr_ifname = strdup(ifname)) == NULL)
            goto memory_error;
        if (VIR_ALLOC(calld->virtPortProfile) < 0)
            goto memory_error;
        memcpy(calld->virtPortProfile, virtPortProfile, sizeof(*virtPortProfile));
770
        virMacAddrSet(&calld->macaddress, macaddress);
771 772
        if ((calld->linkdev = strdup(linkdev)) == NULL)
            goto  memory_error;
S
Stefan Berger 已提交
773
        memcpy(calld->vmuuid, vmuuid, sizeof(calld->vmuuid));
774 775 776 777 778

        calld->vmOp = vmOp;

        if (virNetlinkEventAddClient(virNetDevMacVLanVPortProfileCallback,
                                     virNetDevMacVLanVPortProfileDestroyCallback,
779
                                     calld, macaddress, NETLINK_ROUTE) < 0)
780 781 782 783 784 785 786 787 788 789 790 791
            goto error;
    }

    return 0;

memory_error:
    virReportOOMError();
error:
    virNetlinkCallbackDataFree(calld);
    return -1;
}

792

793
/**
794
 * virNetDevMacVLanCreateWithVPortProfile:
795 796 797 798 799 800 801 802 803 804 805 806 807 808
 * Create an instance of a macvtap device and open its tap character
 * device.
 * @tgifname: Interface name that the macvtap is supposed to have. May
 *    be NULL if this function is supposed to choose a name
 * @macaddress: The MAC address for the macvtap device
 * @linkdev: The interface name of the NIC to connect to the external bridge
 * @mode: int describing the mode for 'bridge', 'vepa', 'private' or 'passthru'.
 * @vnet_hdr: 1 to enable IFF_VNET_HDR, 0 to disable it
 * @vmuuid: The UUID of the VM the macvtap belongs to
 * @virtPortProfile: pointer to object holding the virtual port profile data
 * @res_ifname: Pointer to a string pointer where the actual name of the
 *     interface will be stored into if everything succeeded. It is up
 *     to the caller to free the string.
 *
809 810
 * Returns file descriptor of the tap device in case of success with @withTap,
 * otherwise returns 0; returns -1 on error.
811
 */
812
int virNetDevMacVLanCreateWithVPortProfile(const char *tgifname,
813
                                           const virMacAddrPtr macaddress,
814 815
                                           const char *linkdev,
                                           enum virNetDevMacVLanMode mode,
816
                                           bool withTap,
817 818 819 820 821 822 823
                                           int vnet_hdr,
                                           const unsigned char *vmuuid,
                                           virNetDevVPortProfilePtr virtPortProfile,
                                           char **res_ifname,
                                           enum virNetDevVPortProfileOp vmOp,
                                           char *stateDir,
                                           virNetDevBandwidthPtr bandwidth)
824
{
825 826 827
    const char *type = withTap ? "macvtap" : "macvlan";
    const char *prefix = withTap ? MACVTAP_NAME_PREFIX : MACVLAN_NAME_PREFIX;
    const char *pattern = withTap ? MACVTAP_NAME_PATTERN : MACVLAN_NAME_PATTERN;
828 829 830 831 832
    int c, rc;
    char ifname[IFNAMSIZ];
    int retries, do_retry = 0;
    uint32_t macvtapMode;
    const char *cr_ifname;
833
    int ret;
834
    int vf = -1;
835 836 837 838 839 840 841 842 843 844 845 846 847 848 849

    macvtapMode = modeMap[mode];

    *res_ifname = NULL;

    VIR_DEBUG("%s: VM OPERATION: %s", __FUNCTION__, virNetDevVPortProfileOpTypeToString(vmOp));

    /** Note: When using PASSTHROUGH mode with MACVTAP devices the link
     * device's MAC address must be set to the VMs MAC address. In
     * order to not confuse the first switch or bridge in line this MAC
     * address must be reset when the VM is shut down.
     * This is especially important when using SRIOV capable cards that
     * emulate their switch in firmware.
     */
    if (mode == VIR_NETDEV_MACVLAN_MODE_PASSTHRU) {
850
        if (virNetDevReplaceMacAddress(linkdev, macaddress, stateDir) < 0)
851 852 853 854
            return -1;
    }

    if (tgifname) {
855 856 857 858
        if ((ret = virNetDevExists(tgifname)) < 0)
            return -1;

        if (ret) {
859
            if (STRPREFIX(tgifname, prefix)) {
860 861
                goto create_name;
            }
862 863
            virReportSystemError(EEXIST,
                                 _("Unable to create macvlan device %s"), tgifname);
864 865 866
            return -1;
        }
        cr_ifname = tgifname;
867 868
        rc = virNetDevMacVLanCreate(tgifname, type, macaddress, linkdev,
                                    macvtapMode, &do_retry);
869 870 871 872 873 874
        if (rc < 0)
            return -1;
    } else {
create_name:
        retries = 5;
        for (c = 0; c < 8192; c++) {
875
            snprintf(ifname, sizeof(ifname), pattern, c);
876 877 878
            if ((ret = virNetDevExists(ifname)) < 0)
                return -1;
            if (!ret) {
879 880
                rc = virNetDevMacVLanCreate(ifname, type, macaddress, linkdev,
                                            macvtapMode, &do_retry);
881 882 883 884 885 886 887 888 889 890 891 892 893 894 895
                if (rc == 0)
                    break;

                if (do_retry && --retries)
                    continue;
                return -1;
            }
        }
        cr_ifname = ifname;
    }

    if (virNetDevVPortProfileAssociate(cr_ifname,
                                       virtPortProfile,
                                       macaddress,
                                       linkdev,
896
                                       vf,
897
                                       vmuuid, vmOp, false) < 0) {
898 899 900 901 902 903 904 905 906
        rc = -1;
        goto link_del_exit;
    }

    if (virNetDevSetOnline(cr_ifname, true) < 0) {
        rc = -1;
        goto disassociate_exit;
    }

907 908 909 910
    if (withTap) {
        if ((rc = virNetDevMacVLanTapOpen(cr_ifname, 10)) < 0)
            goto disassociate_exit;

911 912 913 914
        if (virNetDevMacVLanTapSetup(rc, vnet_hdr) < 0) {
            VIR_FORCE_CLOSE(rc); /* sets rc to -1 */
            goto disassociate_exit;
        }
915 916 917 918 919 920 921 922 923 924 925 926
        if (!(*res_ifname = strdup(cr_ifname))) {
            VIR_FORCE_CLOSE(rc); /* sets rc to -1 */
            virReportOOMError();
            goto disassociate_exit;
        }
    } else {
        if (!(*res_ifname = strdup(cr_ifname))) {
            virReportOOMError();
            goto disassociate_exit;
        }
        rc = 0;
    }
927 928

    if (virNetDevBandwidthSet(cr_ifname, bandwidth) < 0) {
929
        virReportError(VIR_ERR_INTERNAL_ERROR,
930 931
                       _("cannot set bandwidth limits on %s"),
                       cr_ifname);
932 933 934 935
        if (withTap)
            VIR_FORCE_CLOSE(rc); /* sets rc to -1 */
        else
            rc = -1;
936 937 938
        goto disassociate_exit;
    }

939 940 941 942 943 944 945 946 947 948
    if (vmOp == VIR_NETDEV_VPORT_PROFILE_OP_CREATE ||
        vmOp == VIR_NETDEV_VPORT_PROFILE_OP_RESTORE) {
        /* Only directly register upon a create or restore (restarting
         * a saved image) - migration and libvirtd restart are handled
         * elsewhere.
         */
        if (virNetDevMacVLanVPortProfileRegisterCallback(cr_ifname, macaddress,
                                                         linkdev, vmuuid,
                                                         virtPortProfile,
                                                         vmOp) < 0 )
949
        goto disassociate_exit;
950
    }
951 952 953 954 955 956 957 958

    return rc;

disassociate_exit:
    ignore_value(virNetDevVPortProfileDisassociate(cr_ifname,
                                                   virtPortProfile,
                                                   macaddress,
                                                   linkdev,
959
                                                   vf,
960 961 962
                                                   vmOp));

link_del_exit:
963
    ignore_value(virNetDevMacVLanDelete(cr_ifname));
964 965 966 967 968 969

    return rc;
}


/**
970
 * virNetDevMacVLanDeleteWithVPortProfile:
971 972 973 974 975 976 977 978
 * @ifname : The name of the macvtap interface
 * @linkdev: The interface name of the NIC to connect to the external bridge
 * @virtPortProfile: pointer to object holding the virtual port profile data
 *
 * Delete an interface given its name. Disassociate
 * it with the switch if port profile parameters
 * were provided.
 */
979
int virNetDevMacVLanDeleteWithVPortProfile(const char *ifname,
980
                                           const virMacAddrPtr macaddr,
981 982 983 984
                                           const char *linkdev,
                                           int mode,
                                           virNetDevVPortProfilePtr virtPortProfile,
                                           char *stateDir)
985 986
{
    int ret = 0;
987 988
    int vf = -1;

989
    if (mode == VIR_NETDEV_MACVLAN_MODE_PASSTHRU) {
990
        ignore_value(virNetDevRestoreMacAddress(linkdev, stateDir));
991 992 993 994 995 996 997
    }

    if (ifname) {
        if (virNetDevVPortProfileDisassociate(ifname,
                                              virtPortProfile,
                                              macaddr,
                                              linkdev,
998
                                              vf,
999 1000
                                              VIR_NETDEV_VPORT_PROFILE_OP_DESTROY) < 0)
            ret = -1;
1001
        if (virNetDevMacVLanDelete(ifname) < 0)
1002 1003
            ret = -1;
    }
1004

1005
    virNetlinkEventRemoveClient(0, macaddr, NETLINK_ROUTE);
1006

1007 1008 1009
    return ret;
}

1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
/**
 * virNetDevMacVLanRestartWithVPortProfile:
 * Register a port profile callback handler for a VM that
 * is already running
 * .
 * @cr_ifname: Interface name that the macvtap has.
 * @macaddress: The MAC address for the macvtap device
 * @linkdev: The interface name of the NIC to connect to the external bridge
 * @vmuuid: The UUID of the VM the macvtap belongs to
 * @virtPortProfile: pointer to object holding the virtual port profile data
 * @vmOp: Operation to use during setup of the association
 *
 * Returns 0; returns -1 on error.
 */
int virNetDevMacVLanRestartWithVPortProfile(const char *cr_ifname,
1025
                                           const virMacAddrPtr macaddress,
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
                                           const char *linkdev,
                                           const unsigned char *vmuuid,
                                           virNetDevVPortProfilePtr virtPortProfile,
                                           enum virNetDevVPortProfileOp vmOp)
{
    int rc = 0;

    rc = virNetDevMacVLanVPortProfileRegisterCallback(cr_ifname, macaddress,
                                                      linkdev, vmuuid,
                                                      virtPortProfile, vmOp);
    if (rc < 0)
        goto error;

    ignore_value(virNetDevVPortProfileAssociate(cr_ifname,
                                                virtPortProfile,
                                                macaddress,
                                                linkdev,
                                                -1,
                                                vmuuid,
                                                vmOp, true));

error:
    return rc;

}

1052
#else /* ! WITH_MACVTAP */
1053 1054
int virNetDevMacVLanCreate(const char *ifname ATTRIBUTE_UNUSED,
                           const char *type ATTRIBUTE_UNUSED,
1055
                           const virMacAddrPtr macaddress ATTRIBUTE_UNUSED,
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
                           const char *srcdev ATTRIBUTE_UNUSED,
                           uint32_t macvlan_mode ATTRIBUTE_UNUSED,
                           int *retry ATTRIBUTE_UNUSED)
{
    virReportSystemError(ENOSYS, "%s",
                         _("Cannot create macvlan devices on this platform"));
    return -1;
}

int virNetDevMacVLanDelete(const char *ifname ATTRIBUTE_UNUSED)
{
    virReportSystemError(ENOSYS, "%s",
                         _("Cannot create macvlan devices on this platform"));
    return -1;
}

1072
int virNetDevMacVLanCreateWithVPortProfile(const char *ifname ATTRIBUTE_UNUSED,
1073
                                           const virMacAddrPtr macaddress ATTRIBUTE_UNUSED,
1074 1075
                                           const char *linkdev ATTRIBUTE_UNUSED,
                                           enum virNetDevMacVLanMode mode ATTRIBUTE_UNUSED,
1076
                                           bool withTap ATTRIBUTE_UNUSED,
1077 1078 1079 1080 1081 1082 1083
                                           int vnet_hdr ATTRIBUTE_UNUSED,
                                           const unsigned char *vmuuid ATTRIBUTE_UNUSED,
                                           virNetDevVPortProfilePtr virtPortProfile ATTRIBUTE_UNUSED,
                                           char **res_ifname ATTRIBUTE_UNUSED,
                                           enum virNetDevVPortProfileOp vmop ATTRIBUTE_UNUSED,
                                           char *stateDir ATTRIBUTE_UNUSED,
                                           virNetDevBandwidthPtr bandwidth ATTRIBUTE_UNUSED)
1084 1085 1086 1087 1088 1089
{
    virReportSystemError(ENOSYS, "%s",
                         _("Cannot create macvlan devices on this platform"));
    return -1;
}

1090
int virNetDevMacVLanDeleteWithVPortProfile(const char *ifname ATTRIBUTE_UNUSED,
1091
                                           const virMacAddrPtr macaddress ATTRIBUTE_UNUSED,
1092 1093 1094 1095
                                           const char *linkdev ATTRIBUTE_UNUSED,
                                           int mode ATTRIBUTE_UNUSED,
                                           virNetDevVPortProfilePtr virtPortProfile ATTRIBUTE_UNUSED,
                                           char *stateDir ATTRIBUTE_UNUSED)
1096 1097 1098 1099 1100
{
    virReportSystemError(ENOSYS, "%s",
                         _("Cannot create macvlan devices on this platform"));
    return -1;
}
1101 1102

int virNetDevMacVLanRestartWithVPortProfile(const char *cr_ifname ATTRIBUTE_UNUSED,
1103
                                           const virMacAddrPtr macaddress ATTRIBUTE_UNUSED,
1104 1105 1106 1107 1108 1109 1110 1111 1112
                                           const char *linkdev ATTRIBUTE_UNUSED,
                                           const unsigned char *vmuuid ATTRIBUTE_UNUSED,
                                           virNetDevVPortProfilePtr virtPortProfile ATTRIBUTE_UNUSED,
                                           enum virNetDevVPortProfileOp vmOp ATTRIBUTE_UNUSED)
{
    virReportSystemError(ENOSYS, "%s",
                         _("Cannot create macvlan devices on this platform"));
    return -1;
}
1113 1114

int virNetDevMacVLanVPortProfileRegisterCallback(const char *ifname ATTRIBUTE_UNUSED,
1115
                                             const virMacAddrPtr macaddress ATTRIBUTE_UNUSED,
1116 1117 1118 1119 1120 1121 1122 1123 1124
                                             const char *linkdev ATTRIBUTE_UNUSED,
                                             const unsigned char *vmuuid ATTRIBUTE_UNUSED,
                                             virNetDevVPortProfilePtr virtPortProfile ATTRIBUTE_UNUSED,
                                             enum virNetDevVPortProfileOp vmOp ATTRIBUTE_UNUSED)
{
    virReportSystemError(ENOSYS, "%s",
                         _("Cannot create macvlan devices on this platform"));
    return -1;
}
1125
#endif /* ! WITH_MACVTAP */