linux/tools/hv/hv_kvp_daemon.c
<<
>>
Prefs
   1/*
   2 * An implementation of key value pair (KVP) functionality for Linux.
   3 *
   4 *
   5 * Copyright (C) 2010, Novell, Inc.
   6 * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify it
   9 * under the terms of the GNU General Public License version 2 as published
  10 * by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful, but
  13 * WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  15 * NON INFRINGEMENT.  See the GNU General Public License for more
  16 * details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21 *
  22 */
  23
  24
  25#include <sys/types.h>
  26#include <sys/socket.h>
  27#include <sys/poll.h>
  28#include <sys/utsname.h>
  29#include <linux/types.h>
  30#include <stdio.h>
  31#include <stdlib.h>
  32#include <unistd.h>
  33#include <string.h>
  34#include <errno.h>
  35#include <arpa/inet.h>
  36#include <linux/connector.h>
  37#include <linux/hyperv.h>
  38#include <linux/netlink.h>
  39#include <ifaddrs.h>
  40#include <netdb.h>
  41#include <syslog.h>
  42#include <sys/stat.h>
  43#include <fcntl.h>
  44
  45/*
  46 * KVP protocol: The user mode component first registers with the
  47 * the kernel component. Subsequently, the kernel component requests, data
  48 * for the specified keys. In response to this message the user mode component
  49 * fills in the value corresponding to the specified key. We overload the
  50 * sequence field in the cn_msg header to define our KVP message types.
  51 *
  52 * We use this infrastructure for also supporting queries from user mode
  53 * application for state that may be maintained in the KVP kernel component.
  54 *
  55 */
  56
  57
  58enum key_index {
  59        FullyQualifiedDomainName = 0,
  60        IntegrationServicesVersion, /*This key is serviced in the kernel*/
  61        NetworkAddressIPv4,
  62        NetworkAddressIPv6,
  63        OSBuildNumber,
  64        OSName,
  65        OSMajorVersion,
  66        OSMinorVersion,
  67        OSVersion,
  68        ProcessorArchitecture
  69};
  70
  71static char kvp_send_buffer[4096];
  72static char kvp_recv_buffer[4096];
  73static struct sockaddr_nl addr;
  74
  75static char *os_name = "";
  76static char *os_major = "";
  77static char *os_minor = "";
  78static char *processor_arch;
  79static char *os_build;
  80static char *lic_version;
  81static struct utsname uts_buf;
  82
  83
  84#define MAX_FILE_NAME 100
  85#define ENTRIES_PER_BLOCK 50
  86
  87struct kvp_record {
  88        __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
  89        __u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
  90};
  91
  92struct kvp_file_state {
  93        int fd;
  94        int num_blocks;
  95        struct kvp_record *records;
  96        int num_records;
  97        __u8 fname[MAX_FILE_NAME];
  98};
  99
 100static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
 101
 102static void kvp_acquire_lock(int pool)
 103{
 104        struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
 105        fl.l_pid = getpid();
 106
 107        if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
 108                syslog(LOG_ERR, "Failed to acquire the lock pool: %d", pool);
 109                exit(-1);
 110        }
 111}
 112
 113static void kvp_release_lock(int pool)
 114{
 115        struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
 116        fl.l_pid = getpid();
 117
 118        if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
 119                perror("fcntl");
 120                syslog(LOG_ERR, "Failed to release the lock pool: %d", pool);
 121                exit(-1);
 122        }
 123}
 124
 125static void kvp_update_file(int pool)
 126{
 127        FILE *filep;
 128        size_t bytes_written;
 129
 130        /*
 131         * We are going to write our in-memory registry out to
 132         * disk; acquire the lock first.
 133         */
 134        kvp_acquire_lock(pool);
 135
 136        filep = fopen(kvp_file_info[pool].fname, "w");
 137        if (!filep) {
 138                kvp_release_lock(pool);
 139                syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
 140                exit(-1);
 141        }
 142
 143        bytes_written = fwrite(kvp_file_info[pool].records,
 144                                sizeof(struct kvp_record),
 145                                kvp_file_info[pool].num_records, filep);
 146
 147        fflush(filep);
 148        kvp_release_lock(pool);
 149}
 150
 151static void kvp_update_mem_state(int pool)
 152{
 153        FILE *filep;
 154        size_t records_read = 0;
 155        struct kvp_record *record = kvp_file_info[pool].records;
 156        struct kvp_record *readp;
 157        int num_blocks = kvp_file_info[pool].num_blocks;
 158        int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
 159
 160        kvp_acquire_lock(pool);
 161
 162        filep = fopen(kvp_file_info[pool].fname, "r");
 163        if (!filep) {
 164                kvp_release_lock(pool);
 165                syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
 166                exit(-1);
 167        }
 168        while (!feof(filep)) {
 169                readp = &record[records_read];
 170                records_read += fread(readp, sizeof(struct kvp_record),
 171                                        ENTRIES_PER_BLOCK * num_blocks,
 172                                        filep);
 173
 174                if (!feof(filep)) {
 175                        /*
 176                         * We have more data to read.
 177                         */
 178                        num_blocks++;
 179                        record = realloc(record, alloc_unit * num_blocks);
 180
 181                        if (record == NULL) {
 182                                syslog(LOG_ERR, "malloc failed");
 183                                exit(-1);
 184                        }
 185                        continue;
 186                }
 187                break;
 188        }
 189
 190        kvp_file_info[pool].num_blocks = num_blocks;
 191        kvp_file_info[pool].records = record;
 192        kvp_file_info[pool].num_records = records_read;
 193
 194        kvp_release_lock(pool);
 195}
 196static int kvp_file_init(void)
 197{
 198        int ret, fd;
 199        FILE *filep;
 200        size_t records_read;
 201        __u8 *fname;
 202        struct kvp_record *record;
 203        struct kvp_record *readp;
 204        int num_blocks;
 205        int i;
 206        int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
 207
 208        if (access("/var/opt/hyperv", F_OK)) {
 209                if (mkdir("/var/opt/hyperv", S_IRUSR | S_IWUSR | S_IROTH)) {
 210                        syslog(LOG_ERR, " Failed to create /var/opt/hyperv");
 211                        exit(-1);
 212                }
 213        }
 214
 215        for (i = 0; i < KVP_POOL_COUNT; i++) {
 216                fname = kvp_file_info[i].fname;
 217                records_read = 0;
 218                num_blocks = 1;
 219                sprintf(fname, "/var/opt/hyperv/.kvp_pool_%d", i);
 220                fd = open(fname, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IROTH);
 221
 222                if (fd == -1)
 223                        return 1;
 224
 225
 226                filep = fopen(fname, "r");
 227                if (!filep)
 228                        return 1;
 229
 230                record = malloc(alloc_unit * num_blocks);
 231                if (record == NULL) {
 232                        fclose(filep);
 233                        return 1;
 234                }
 235                while (!feof(filep)) {
 236                        readp = &record[records_read];
 237                        records_read += fread(readp, sizeof(struct kvp_record),
 238                                        ENTRIES_PER_BLOCK,
 239                                        filep);
 240
 241                        if (!feof(filep)) {
 242                                /*
 243                                 * We have more data to read.
 244                                 */
 245                                num_blocks++;
 246                                record = realloc(record, alloc_unit *
 247                                                num_blocks);
 248                                if (record == NULL) {
 249                                        fclose(filep);
 250                                        return 1;
 251                                }
 252                                continue;
 253                        }
 254                        break;
 255                }
 256                kvp_file_info[i].fd = fd;
 257                kvp_file_info[i].num_blocks = num_blocks;
 258                kvp_file_info[i].records = record;
 259                kvp_file_info[i].num_records = records_read;
 260                fclose(filep);
 261
 262        }
 263
 264        return 0;
 265}
 266
 267static int kvp_key_delete(int pool, __u8 *key, int key_size)
 268{
 269        int i;
 270        int j, k;
 271        int num_records;
 272        struct kvp_record *record;
 273
 274        /*
 275         * First update the in-memory state.
 276         */
 277        kvp_update_mem_state(pool);
 278
 279        num_records = kvp_file_info[pool].num_records;
 280        record = kvp_file_info[pool].records;
 281
 282        for (i = 0; i < num_records; i++) {
 283                if (memcmp(key, record[i].key, key_size))
 284                        continue;
 285                /*
 286                 * Found a match; just move the remaining
 287                 * entries up.
 288                 */
 289                if (i == num_records) {
 290                        kvp_file_info[pool].num_records--;
 291                        kvp_update_file(pool);
 292                        return 0;
 293                }
 294
 295                j = i;
 296                k = j + 1;
 297                for (; k < num_records; k++) {
 298                        strcpy(record[j].key, record[k].key);
 299                        strcpy(record[j].value, record[k].value);
 300                        j++;
 301                }
 302
 303                kvp_file_info[pool].num_records--;
 304                kvp_update_file(pool);
 305                return 0;
 306        }
 307        return 1;
 308}
 309
 310static int kvp_key_add_or_modify(int pool, __u8 *key, int key_size, __u8 *value,
 311                        int value_size)
 312{
 313        int i;
 314        int j, k;
 315        int num_records;
 316        struct kvp_record *record;
 317        int num_blocks;
 318
 319        if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
 320                (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
 321                return 1;
 322
 323        /*
 324         * First update the in-memory state.
 325         */
 326        kvp_update_mem_state(pool);
 327
 328        num_records = kvp_file_info[pool].num_records;
 329        record = kvp_file_info[pool].records;
 330        num_blocks = kvp_file_info[pool].num_blocks;
 331
 332        for (i = 0; i < num_records; i++) {
 333                if (memcmp(key, record[i].key, key_size))
 334                        continue;
 335                /*
 336                 * Found a match; just update the value -
 337                 * this is the modify case.
 338                 */
 339                memcpy(record[i].value, value, value_size);
 340                kvp_update_file(pool);
 341                return 0;
 342        }
 343
 344        /*
 345         * Need to add a new entry;
 346         */
 347        if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
 348                /* Need to allocate a larger array for reg entries. */
 349                record = realloc(record, sizeof(struct kvp_record) *
 350                         ENTRIES_PER_BLOCK * (num_blocks + 1));
 351
 352                if (record == NULL)
 353                        return 1;
 354                kvp_file_info[pool].num_blocks++;
 355
 356        }
 357        memcpy(record[i].value, value, value_size);
 358        memcpy(record[i].key, key, key_size);
 359        kvp_file_info[pool].records = record;
 360        kvp_file_info[pool].num_records++;
 361        kvp_update_file(pool);
 362        return 0;
 363}
 364
 365static int kvp_get_value(int pool, __u8 *key, int key_size, __u8 *value,
 366                        int value_size)
 367{
 368        int i;
 369        int num_records;
 370        struct kvp_record *record;
 371
 372        if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
 373                (value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
 374                return 1;
 375
 376        /*
 377         * First update the in-memory state.
 378         */
 379        kvp_update_mem_state(pool);
 380
 381        num_records = kvp_file_info[pool].num_records;
 382        record = kvp_file_info[pool].records;
 383
 384        for (i = 0; i < num_records; i++) {
 385                if (memcmp(key, record[i].key, key_size))
 386                        continue;
 387                /*
 388                 * Found a match; just copy the value out.
 389                 */
 390                memcpy(value, record[i].value, value_size);
 391                return 0;
 392        }
 393
 394        return 1;
 395}
 396
 397static void kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
 398                                __u8 *value, int value_size)
 399{
 400        struct kvp_record *record;
 401
 402        /*
 403         * First update our in-memory database.
 404         */
 405        kvp_update_mem_state(pool);
 406        record = kvp_file_info[pool].records;
 407
 408        if (index >= kvp_file_info[pool].num_records) {
 409                /*
 410                 * This is an invalid index; terminate enumeration;
 411                 * - a NULL value will do the trick.
 412                 */
 413                strcpy(value, "");
 414                return;
 415        }
 416
 417        memcpy(key, record[index].key, key_size);
 418        memcpy(value, record[index].value, value_size);
 419}
 420
 421
 422void kvp_get_os_info(void)
 423{
 424        FILE    *file;
 425        char    *p, buf[512];
 426
 427        uname(&uts_buf);
 428        os_build = uts_buf.release;
 429        processor_arch = uts_buf.machine;
 430
 431        /*
 432         * The current windows host (win7) expects the build
 433         * string to be of the form: x.y.z
 434         * Strip additional information we may have.
 435         */
 436        p = strchr(os_build, '-');
 437        if (p)
 438                *p = '\0';
 439
 440        file = fopen("/etc/SuSE-release", "r");
 441        if (file != NULL)
 442                goto kvp_osinfo_found;
 443        file  = fopen("/etc/redhat-release", "r");
 444        if (file != NULL)
 445                goto kvp_osinfo_found;
 446        /*
 447         * Add code for other supported platforms.
 448         */
 449
 450        /*
 451         * We don't have information about the os.
 452         */
 453        os_name = uts_buf.sysname;
 454        return;
 455
 456kvp_osinfo_found:
 457        /* up to three lines */
 458        p = fgets(buf, sizeof(buf), file);
 459        if (p) {
 460                p = strchr(buf, '\n');
 461                if (p)
 462                        *p = '\0';
 463                p = strdup(buf);
 464                if (!p)
 465                        goto done;
 466                os_name = p;
 467
 468                /* second line */
 469                p = fgets(buf, sizeof(buf), file);
 470                if (p) {
 471                        p = strchr(buf, '\n');
 472                        if (p)
 473                                *p = '\0';
 474                        p = strdup(buf);
 475                        if (!p)
 476                                goto done;
 477                        os_major = p;
 478
 479                        /* third line */
 480                        p = fgets(buf, sizeof(buf), file);
 481                        if (p)  {
 482                                p = strchr(buf, '\n');
 483                                if (p)
 484                                        *p = '\0';
 485                                p = strdup(buf);
 486                                if (p)
 487                                        os_minor = p;
 488                        }
 489                }
 490        }
 491
 492done:
 493        fclose(file);
 494        return;
 495}
 496
 497static int
 498kvp_get_ip_address(int family, char *buffer, int length)
 499{
 500        struct ifaddrs *ifap;
 501        struct ifaddrs *curp;
 502        int ipv4_len = strlen("255.255.255.255") + 1;
 503        int ipv6_len = strlen("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")+1;
 504        int offset = 0;
 505        const char *str;
 506        char tmp[50];
 507        int error = 0;
 508
 509        /*
 510         * On entry into this function, the buffer is capable of holding the
 511         * maximum key value (2048 bytes).
 512         */
 513
 514        if (getifaddrs(&ifap)) {
 515                strcpy(buffer, "getifaddrs failed\n");
 516                return 1;
 517        }
 518
 519        curp = ifap;
 520        while (curp != NULL) {
 521                if ((curp->ifa_addr != NULL) &&
 522                   (curp->ifa_addr->sa_family == family)) {
 523                        if (family == AF_INET) {
 524                                struct sockaddr_in *addr =
 525                                (struct sockaddr_in *) curp->ifa_addr;
 526
 527                                str = inet_ntop(family, &addr->sin_addr,
 528                                                tmp, 50);
 529                                if (str == NULL) {
 530                                        strcpy(buffer, "inet_ntop failed\n");
 531                                        error = 1;
 532                                        goto getaddr_done;
 533                                }
 534                                if (offset == 0)
 535                                        strcpy(buffer, tmp);
 536                                else
 537                                        strcat(buffer, tmp);
 538                                strcat(buffer, ";");
 539
 540                                offset += strlen(str) + 1;
 541                                if ((length - offset) < (ipv4_len + 1))
 542                                        goto getaddr_done;
 543
 544                        } else {
 545
 546                        /*
 547                         * We only support AF_INET and AF_INET6
 548                         * and the list of addresses is separated by a ";".
 549                         */
 550                                struct sockaddr_in6 *addr =
 551                                (struct sockaddr_in6 *) curp->ifa_addr;
 552
 553                                str = inet_ntop(family,
 554                                        &addr->sin6_addr.s6_addr,
 555                                        tmp, 50);
 556                                if (str == NULL) {
 557                                        strcpy(buffer, "inet_ntop failed\n");
 558                                        error = 1;
 559                                        goto getaddr_done;
 560                                }
 561                                if (offset == 0)
 562                                        strcpy(buffer, tmp);
 563                                else
 564                                        strcat(buffer, tmp);
 565                                strcat(buffer, ";");
 566                                offset += strlen(str) + 1;
 567                                if ((length - offset) < (ipv6_len + 1))
 568                                        goto getaddr_done;
 569
 570                        }
 571
 572                }
 573                curp = curp->ifa_next;
 574        }
 575
 576getaddr_done:
 577        freeifaddrs(ifap);
 578        return error;
 579}
 580
 581
 582static int
 583kvp_get_domain_name(char *buffer, int length)
 584{
 585        struct addrinfo hints, *info ;
 586        int error = 0;
 587
 588        gethostname(buffer, length);
 589        memset(&hints, 0, sizeof(hints));
 590        hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
 591        hints.ai_socktype = SOCK_STREAM;
 592        hints.ai_flags = AI_CANONNAME;
 593
 594        error = getaddrinfo(buffer, NULL, &hints, &info);
 595        if (error != 0) {
 596                strcpy(buffer, "getaddrinfo failed\n");
 597                return error;
 598        }
 599        strcpy(buffer, info->ai_canonname);
 600        freeaddrinfo(info);
 601        return error;
 602}
 603
 604static int
 605netlink_send(int fd, struct cn_msg *msg)
 606{
 607        struct nlmsghdr *nlh;
 608        unsigned int size;
 609        struct msghdr message;
 610        char buffer[64];
 611        struct iovec iov[2];
 612
 613        size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
 614
 615        nlh = (struct nlmsghdr *)buffer;
 616        nlh->nlmsg_seq = 0;
 617        nlh->nlmsg_pid = getpid();
 618        nlh->nlmsg_type = NLMSG_DONE;
 619        nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
 620        nlh->nlmsg_flags = 0;
 621
 622        iov[0].iov_base = nlh;
 623        iov[0].iov_len = sizeof(*nlh);
 624
 625        iov[1].iov_base = msg;
 626        iov[1].iov_len = size;
 627
 628        memset(&message, 0, sizeof(message));
 629        message.msg_name = &addr;
 630        message.msg_namelen = sizeof(addr);
 631        message.msg_iov = iov;
 632        message.msg_iovlen = 2;
 633
 634        return sendmsg(fd, &message, 0);
 635}
 636
 637int main(void)
 638{
 639        int fd, len, sock_opt;
 640        int error;
 641        struct cn_msg *message;
 642        struct pollfd pfd;
 643        struct nlmsghdr *incoming_msg;
 644        struct cn_msg   *incoming_cn_msg;
 645        struct hv_kvp_msg *hv_msg;
 646        char    *p;
 647        char    *key_value;
 648        char    *key_name;
 649
 650        daemon(1, 0);
 651        openlog("KVP", 0, LOG_USER);
 652        syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
 653        /*
 654         * Retrieve OS release information.
 655         */
 656        kvp_get_os_info();
 657
 658        if (kvp_file_init()) {
 659                syslog(LOG_ERR, "Failed to initialize the pools");
 660                exit(-1);
 661        }
 662
 663        fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
 664        if (fd < 0) {
 665                syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
 666                exit(-1);
 667        }
 668        addr.nl_family = AF_NETLINK;
 669        addr.nl_pad = 0;
 670        addr.nl_pid = 0;
 671        addr.nl_groups = CN_KVP_IDX;
 672
 673
 674        error = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
 675        if (error < 0) {
 676                syslog(LOG_ERR, "bind failed; error:%d", error);
 677                close(fd);
 678                exit(-1);
 679        }
 680        sock_opt = addr.nl_groups;
 681        setsockopt(fd, 270, 1, &sock_opt, sizeof(sock_opt));
 682        /*
 683         * Register ourselves with the kernel.
 684         */
 685        message = (struct cn_msg *)kvp_send_buffer;
 686        message->id.idx = CN_KVP_IDX;
 687        message->id.val = CN_KVP_VAL;
 688
 689        hv_msg = (struct hv_kvp_msg *)message->data;
 690        hv_msg->kvp_hdr.operation = KVP_OP_REGISTER;
 691        message->ack = 0;
 692        message->len = sizeof(struct hv_kvp_msg);
 693
 694        len = netlink_send(fd, message);
 695        if (len < 0) {
 696                syslog(LOG_ERR, "netlink_send failed; error:%d", len);
 697                close(fd);
 698                exit(-1);
 699        }
 700
 701        pfd.fd = fd;
 702
 703        while (1) {
 704                struct sockaddr *addr_p = (struct sockaddr *) &addr;
 705                socklen_t addr_l = sizeof(addr);
 706                pfd.events = POLLIN;
 707                pfd.revents = 0;
 708                poll(&pfd, 1, -1);
 709
 710                len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
 711                                addr_p, &addr_l);
 712
 713                if (len < 0 || addr.nl_pid) {
 714                        syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
 715                                        addr.nl_pid, errno, strerror(errno));
 716                        close(fd);
 717                        return -1;
 718                }
 719
 720                incoming_msg = (struct nlmsghdr *)kvp_recv_buffer;
 721                incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
 722                hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
 723
 724                switch (hv_msg->kvp_hdr.operation) {
 725                case KVP_OP_REGISTER:
 726                        /*
 727                         * Driver is registering with us; stash away the version
 728                         * information.
 729                         */
 730                        p = (char *)hv_msg->body.kvp_register.version;
 731                        lic_version = malloc(strlen(p) + 1);
 732                        if (lic_version) {
 733                                strcpy(lic_version, p);
 734                                syslog(LOG_INFO, "KVP LIC Version: %s",
 735                                        lic_version);
 736                        } else {
 737                                syslog(LOG_ERR, "malloc failed");
 738                        }
 739                        continue;
 740
 741                /*
 742                 * The current protocol with the kernel component uses a
 743                 * NULL key name to pass an error condition.
 744                 * For the SET, GET and DELETE operations,
 745                 * use the existing protocol to pass back error.
 746                 */
 747
 748                case KVP_OP_SET:
 749                        if (kvp_key_add_or_modify(hv_msg->kvp_hdr.pool,
 750                                        hv_msg->body.kvp_set.data.key,
 751                                        hv_msg->body.kvp_set.data.key_size,
 752                                        hv_msg->body.kvp_set.data.value,
 753                                        hv_msg->body.kvp_set.data.value_size))
 754                                strcpy(hv_msg->body.kvp_set.data.key, "");
 755                        break;
 756
 757                case KVP_OP_GET:
 758                        if (kvp_get_value(hv_msg->kvp_hdr.pool,
 759                                        hv_msg->body.kvp_set.data.key,
 760                                        hv_msg->body.kvp_set.data.key_size,
 761                                        hv_msg->body.kvp_set.data.value,
 762                                        hv_msg->body.kvp_set.data.value_size))
 763                                strcpy(hv_msg->body.kvp_set.data.key, "");
 764                        break;
 765
 766                case KVP_OP_DELETE:
 767                        if (kvp_key_delete(hv_msg->kvp_hdr.pool,
 768                                        hv_msg->body.kvp_delete.key,
 769                                        hv_msg->body.kvp_delete.key_size))
 770                                strcpy(hv_msg->body.kvp_delete.key, "");
 771                        break;
 772
 773                default:
 774                        break;
 775                }
 776
 777                if (hv_msg->kvp_hdr.operation != KVP_OP_ENUMERATE)
 778                        goto kvp_done;
 779
 780                /*
 781                 * If the pool is KVP_POOL_AUTO, dynamically generate
 782                 * both the key and the value; if not read from the
 783                 * appropriate pool.
 784                 */
 785                if (hv_msg->kvp_hdr.pool != KVP_POOL_AUTO) {
 786                        kvp_pool_enumerate(hv_msg->kvp_hdr.pool,
 787                                        hv_msg->body.kvp_enum_data.index,
 788                                        hv_msg->body.kvp_enum_data.data.key,
 789                                        HV_KVP_EXCHANGE_MAX_KEY_SIZE,
 790                                        hv_msg->body.kvp_enum_data.data.value,
 791                                        HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
 792                        goto kvp_done;
 793                }
 794
 795                hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
 796                key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
 797                key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
 798
 799                switch (hv_msg->body.kvp_enum_data.index) {
 800                case FullyQualifiedDomainName:
 801                        kvp_get_domain_name(key_value,
 802                                        HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
 803                        strcpy(key_name, "FullyQualifiedDomainName");
 804                        break;
 805                case IntegrationServicesVersion:
 806                        strcpy(key_name, "IntegrationServicesVersion");
 807                        strcpy(key_value, lic_version);
 808                        break;
 809                case NetworkAddressIPv4:
 810                        kvp_get_ip_address(AF_INET, key_value,
 811                                        HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
 812                        strcpy(key_name, "NetworkAddressIPv4");
 813                        break;
 814                case NetworkAddressIPv6:
 815                        kvp_get_ip_address(AF_INET6, key_value,
 816                                        HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
 817                        strcpy(key_name, "NetworkAddressIPv6");
 818                        break;
 819                case OSBuildNumber:
 820                        strcpy(key_value, os_build);
 821                        strcpy(key_name, "OSBuildNumber");
 822                        break;
 823                case OSName:
 824                        strcpy(key_value, os_name);
 825                        strcpy(key_name, "OSName");
 826                        break;
 827                case OSMajorVersion:
 828                        strcpy(key_value, os_major);
 829                        strcpy(key_name, "OSMajorVersion");
 830                        break;
 831                case OSMinorVersion:
 832                        strcpy(key_value, os_minor);
 833                        strcpy(key_name, "OSMinorVersion");
 834                        break;
 835                case OSVersion:
 836                        strcpy(key_value, os_build);
 837                        strcpy(key_name, "OSVersion");
 838                        break;
 839                case ProcessorArchitecture:
 840                        strcpy(key_value, processor_arch);
 841                        strcpy(key_name, "ProcessorArchitecture");
 842                        break;
 843                default:
 844                        strcpy(key_value, "Unknown Key");
 845                        /*
 846                         * We use a null key name to terminate enumeration.
 847                         */
 848                        strcpy(key_name, "");
 849                        break;
 850                }
 851                /*
 852                 * Send the value back to the kernel. The response is
 853                 * already in the receive buffer. Update the cn_msg header to
 854                 * reflect the key value that has been added to the message
 855                 */
 856kvp_done:
 857
 858                incoming_cn_msg->id.idx = CN_KVP_IDX;
 859                incoming_cn_msg->id.val = CN_KVP_VAL;
 860                incoming_cn_msg->ack = 0;
 861                incoming_cn_msg->len = sizeof(struct hv_kvp_msg);
 862
 863                len = netlink_send(fd, incoming_cn_msg);
 864                if (len < 0) {
 865                        syslog(LOG_ERR, "net_link send failed; error:%d", len);
 866                        exit(-1);
 867                }
 868        }
 869
 870}
 871
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.