examples/vm_power_manager/channel_manager.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <sys/un.h>
   8 #include <fcntl.h>
   9 #include <unistd.h>
  10 #include <inttypes.h>
  11 #include <dirent.h>
  12 #include <errno.h>
  13
  14 #include <sys/queue.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <sys/socket.h>
  18 #include <sys/select.h>
  19
  20 #include <rte_string_fns.h>
  21 #include <rte_malloc.h>
  22 #include <rte_memory.h>
  23 #include <rte_mempool.h>
  24 #include <rte_log.h>
  25 #include <rte_atomic.h>
  26 #include <rte_spinlock.h>
  27
  28 #include <libvirt/libvirt.h>
  29
  30 #include "channel_manager.h"
  31 #include "channel_commands.h"
  32 #include "channel_monitor.h"
  33 #include "power_manager.h"
  34
  35
  36 #define RTE_LOGTYPE_CHANNEL_MANAGER RTE_LOGTYPE_USER1
  37
  38 /* Global pointer to libvirt connection */
  39 static virConnectPtr global_vir_conn_ptr;
  40
  41 static unsigned char *global_cpumaps;
  42 static virVcpuInfo *global_vircpuinfo;
  43 static size_t global_maplen;
  44
  45 static unsigned int global_n_host_cpus;
  46 static bool global_hypervisor_available;
  47
  48 /*
  49  * Represents a single Virtual Machine
  50  */
  51 struct virtual_machine_info {
  52         char name[CHANNEL_MGR_MAX_NAME_LEN];
  53         uint16_t pcpu_map[RTE_MAX_LCORE];
  54         struct channel_info *channels[RTE_MAX_LCORE];
  55         char channel_mask[RTE_MAX_LCORE];
  56         uint8_t num_channels;
  57         enum vm_status status;
  58         virDomainPtr domainPtr;
  59         virDomainInfo info;
  60         rte_spinlock_t config_spinlock;
  61         LIST_ENTRY(virtual_machine_info) vms_info;
  62 };
  63
  64 LIST_HEAD(, virtual_machine_info) vm_list_head;
  65
  66 static struct virtual_machine_info *
  67 find_domain_by_name(const char *name)
  68 {
  69         struct virtual_machine_info *info;
  70         LIST_FOREACH(info, &vm_list_head, vms_info) {
  71                 if (!strncmp(info->name, name, CHANNEL_MGR_MAX_NAME_LEN-1))
  72                         return info;
  73         }
  74         return NULL;
  75 }
  76
  77 static int
  78 update_pcpus_mask(struct virtual_machine_info *vm_info)
  79 {
  80         virVcpuInfoPtr cpuinfo;
  81         unsigned i, j;
  82         int n_vcpus;
  83
  84         memset(global_cpumaps, 0, RTE_MAX_LCORE*global_maplen);
  85
  86         if (!virDomainIsActive(vm_info->domainPtr)) {
  87                 n_vcpus = virDomainGetVcpuPinInfo(vm_info->domainPtr,
  88                                 vm_info->info.nrVirtCpu, global_cpumaps, global_maplen,
  89                                 VIR_DOMAIN_AFFECT_CONFIG);
  90                 if (n_vcpus < 0) {
  91                         RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting vCPU info for "
  92                                         "in-active VM '%s'\n", vm_info->name);
  93                         return -1;
  94                 }
  95                 goto update_pcpus;
  96         }
  97
  98         memset(global_vircpuinfo, 0, sizeof(*global_vircpuinfo)*
  99                         RTE_MAX_LCORE);
 100
 101         cpuinfo = global_vircpuinfo;
 102
 103         n_vcpus = virDomainGetVcpus(vm_info->domainPtr, cpuinfo,
 104                         RTE_MAX_LCORE, global_cpumaps, global_maplen);
 105         if (n_vcpus < 0) {
 106                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting vCPU info for "
 107                                 "active VM '%s'\n", vm_info->name);
 108                 return -1;
 109         }
 110 update_pcpus:
 111         if (n_vcpus >= RTE_MAX_LCORE) {
 112                 RTE_LOG(ERR, CHANNEL_MANAGER, "Number of vCPUS(%u) is out of range "
 113                                 "0...%d\n", n_vcpus, RTE_MAX_LCORE-1);
 114                 return -1;
 115         }
 116         if (n_vcpus != vm_info->info.nrVirtCpu) {
 117                 RTE_LOG(INFO, CHANNEL_MANAGER, "Updating the number of vCPUs for VM '%s"
 118                                 " from %d -> %d\n", vm_info->name, vm_info->info.nrVirtCpu,
 119                                 n_vcpus);
 120                 vm_info->info.nrVirtCpu = n_vcpus;
 121         }
 122         rte_spinlock_lock(&(vm_info->config_spinlock));
 123         for (i = 0; i < vm_info->info.nrVirtCpu; i++) {
 124                 for (j = 0; j < global_n_host_cpus; j++) {
 125                         if (VIR_CPU_USABLE(global_cpumaps,
 126                                         global_maplen, i, j) <= 0)
 127                                 continue;
 128                         vm_info->pcpu_map[i] = j;
 129                 }
 130         }
 131         rte_spinlock_unlock(&(vm_info->config_spinlock));
 132         return 0;
 133 }
 134
 135 int
 136 set_pcpu(char *vm_name, unsigned int vcpu, unsigned int pcpu)
 137 {
 138         int flags = VIR_DOMAIN_AFFECT_LIVE|VIR_DOMAIN_AFFECT_CONFIG;
 139         struct virtual_machine_info *vm_info;
 140
 141         if (vcpu >= RTE_MAX_LCORE) {
 142                 RTE_LOG(ERR, CHANNEL_MANAGER, "vCPU(%u) exceeds max allowable(%d)\n",
 143                                 vcpu, RTE_MAX_LCORE-1);
 144                 return -1;
 145         }
 146
 147         vm_info = find_domain_by_name(vm_name);
 148         if (vm_info == NULL) {
 149                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM '%s' not found\n", vm_name);
 150                 return -1;
 151         }
 152
 153         if (!virDomainIsActive(vm_info->domainPtr)) {
 154                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to set vCPU(%u) to pCPU "
 155                                 " for VM '%s', VM is not active\n",
 156                                 vcpu, vm_info->name);
 157                 return -1;
 158         }
 159
 160         if (vcpu >= vm_info->info.nrVirtCpu) {
 161                 RTE_LOG(ERR, CHANNEL_MANAGER, "vCPU(%u) exceeds the assigned number of "
 162                                 "vCPUs(%u)\n", vcpu, vm_info->info.nrVirtCpu);
 163                 return -1;
 164         }
 165         memset(global_cpumaps, 0, RTE_MAX_LCORE * global_maplen);
 166
 167         VIR_USE_CPU(global_cpumaps, pcpu);
 168
 169         if (pcpu >= global_n_host_cpus) {
 170                 RTE_LOG(ERR, CHANNEL_MANAGER, "CPU(%u) exceeds the available "
 171                                 "number of CPUs(%u)\n",
 172                                 pcpu, global_n_host_cpus);
 173                 return -1;
 174         }
 175
 176         if (virDomainPinVcpuFlags(vm_info->domainPtr, vcpu, global_cpumaps,
 177                         global_maplen, flags) < 0) {
 178                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to set vCPU(%u) to pCPU "
 179                                 " for VM '%s'\n", vcpu,
 180                                 vm_info->name);
 181                 return -1;
 182         }
 183         rte_spinlock_lock(&(vm_info->config_spinlock));
 184         vm_info->pcpu_map[vcpu] = pcpu;
 185         rte_spinlock_unlock(&(vm_info->config_spinlock));
 186         return 0;
 187 }
 188
 189 uint16_t
 190 get_pcpu(struct channel_info *chan_info, unsigned int vcpu)
 191 {
 192         struct virtual_machine_info *vm_info =
 193                         (struct virtual_machine_info *)chan_info->priv_info;
 194
 195         if (global_hypervisor_available && (vm_info != NULL)) {
 196                 uint16_t pcpu;
 197                 rte_spinlock_lock(&(vm_info->config_spinlock));
 198                 pcpu = vm_info->pcpu_map[vcpu];
 199                 rte_spinlock_unlock(&(vm_info->config_spinlock));
 200                 return pcpu;
 201         } else
 202                 return 0;
 203 }
 204
 205 static inline int
 206 channel_exists(struct virtual_machine_info *vm_info, unsigned channel_num)
 207 {
 208         rte_spinlock_lock(&(vm_info->config_spinlock));
 209         if (vm_info->channel_mask[channel_num] == 1) {
 210                 rte_spinlock_unlock(&(vm_info->config_spinlock));
 211                 return 1;
 212         }
 213         rte_spinlock_unlock(&(vm_info->config_spinlock));
 214         return 0;
 215 }
 216
 217
 218
 219 static int
 220 open_non_blocking_channel(struct channel_info *info)
 221 {
 222         int ret, flags;
 223         struct sockaddr_un sock_addr;
 224         fd_set soc_fd_set;
 225         struct timeval tv;
 226
 227         info->fd = socket(AF_UNIX, SOCK_STREAM, 0);
 228         if (info->fd < 0) {
 229                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error(%s) creating socket for '%s'\n",
 230                                 strerror(errno),
 231                                 info->channel_path);
 232                 return -1;
 233         }
 234         sock_addr.sun_family = AF_UNIX;
 235         memcpy(&sock_addr.sun_path, info->channel_path,
 236                         strlen(info->channel_path)+1);
 237
 238         /* Get current flags */
 239         flags = fcntl(info->fd, F_GETFL, 0);
 240         if (flags < 0) {
 241                 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) fcntl get flags socket for"
 242                                 "'%s'\n", strerror(errno), info->channel_path);
 243                 return 1;
 244         }
 245         /* Set to Non Blocking */
 246         flags |= O_NONBLOCK;
 247         if (fcntl(info->fd, F_SETFL, flags) < 0) {
 248                 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) setting non-blocking "
 249                                 "socket for '%s'\n", strerror(errno), info->channel_path);
 250                 return -1;
 251         }
 252         ret = connect(info->fd, (struct sockaddr *)&sock_addr,
 253                         sizeof(sock_addr));
 254         if (ret < 0) {
 255                 /* ECONNREFUSED error is given when VM is not active */
 256                 if (errno == ECONNREFUSED) {
 257                         RTE_LOG(WARNING, CHANNEL_MANAGER, "VM is not active or has not "
 258                                         "activated its endpoint to channel %s\n",
 259                                         info->channel_path);
 260                         return -1;
 261                 }
 262                 /* Wait for tv_sec if in progress */
 263                 else if (errno == EINPROGRESS) {
 264                         tv.tv_sec = 2;
 265                         tv.tv_usec = 0;
 266                         FD_ZERO(&soc_fd_set);
 267                         FD_SET(info->fd, &soc_fd_set);
 268                         if (select(info->fd+1, NULL, &soc_fd_set, NULL, &tv) > 0) {
 269                                 RTE_LOG(WARNING, CHANNEL_MANAGER, "Timeout or error on channel "
 270                                                 "'%s'\n", info->channel_path);
 271                                 return -1;
 272                         }
 273                 } else {
 274                         /* Any other error */
 275                         RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) connecting socket"
 276                                         " for '%s'\n", strerror(errno), info->channel_path);
 277                         return -1;
 278                 }
 279         }
 280         return 0;
 281 }
 282
 283 static int
 284 open_host_channel(struct channel_info *info)
 285 {
 286         int flags;
 287
 288         info->fd = open(info->channel_path, O_RDWR | O_RSYNC);
 289         if (info->fd < 0) {
 290                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error(%s) opening fifo for '%s'\n",
 291                                 strerror(errno),
 292                                 info->channel_path);
 293                 return -1;
 294         }
 295
 296         /* Get current flags */
 297         flags = fcntl(info->fd, F_GETFL, 0);
 298         if (flags < 0) {
 299                 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) fcntl get flags socket for"
 300                                 "'%s'\n", strerror(errno), info->channel_path);
 301                 return 1;
 302         }
 303         /* Set to Non Blocking */
 304         flags |= O_NONBLOCK;
 305         if (fcntl(info->fd, F_SETFL, flags) < 0) {
 306                 RTE_LOG(WARNING, CHANNEL_MANAGER,
 307                                 "Error(%s) setting non-blocking "
 308                                 "socket for '%s'\n",
 309                                 strerror(errno), info->channel_path);
 310                 return -1;
 311         }
 312         return 0;
 313 }
 314
 315 static int
 316 setup_channel_info(struct virtual_machine_info **vm_info_dptr,
 317                 struct channel_info **chan_info_dptr, unsigned channel_num)
 318 {
 319         struct channel_info *chan_info = *chan_info_dptr;
 320         struct virtual_machine_info *vm_info = *vm_info_dptr;
 321
 322         chan_info->channel_num = channel_num;
 323         chan_info->priv_info = (void *)vm_info;
 324         chan_info->status = CHANNEL_MGR_CHANNEL_DISCONNECTED;
 325         chan_info->type = CHANNEL_TYPE_BINARY;
 326         if (open_non_blocking_channel(chan_info) < 0) {
 327                 RTE_LOG(ERR, CHANNEL_MANAGER, "Could not open channel: "
 328                                 "'%s' for VM '%s'\n",
 329                                 chan_info->channel_path, vm_info->name);
 330                 return -1;
 331         }
 332         if (add_channel_to_monitor(&chan_info) < 0) {
 333                 RTE_LOG(ERR, CHANNEL_MANAGER, "Could add channel: "
 334                                 "'%s' to epoll ctl for VM '%s'\n",
 335                                 chan_info->channel_path, vm_info->name);
 336                 return -1;
 337
 338         }
 339         rte_spinlock_lock(&(vm_info->config_spinlock));
 340         vm_info->num_channels++;
 341         vm_info->channel_mask[channel_num] = 1;
 342         vm_info->channels[channel_num] = chan_info;
 343         chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
 344         rte_spinlock_unlock(&(vm_info->config_spinlock));
 345         return 0;
 346 }
 347
 348 static void
 349 fifo_path(char *dst, unsigned int len)
 350 {
 351         snprintf(dst, len, "%sfifo", CHANNEL_MGR_SOCKET_PATH);
 352 }
 353
 354 static int
 355 setup_host_channel_info(struct channel_info **chan_info_dptr,
 356                 unsigned int channel_num)
 357 {
 358         struct channel_info *chan_info = *chan_info_dptr;
 359
 360         chan_info->channel_num = channel_num;
 361         chan_info->priv_info = (void *)NULL;
 362         chan_info->status = CHANNEL_MGR_CHANNEL_DISCONNECTED;
 363         chan_info->type = CHANNEL_TYPE_JSON;
 364
 365         if (open_host_channel(chan_info) < 0) {
 366                 RTE_LOG(ERR, CHANNEL_MANAGER, "Could not open host channel: "
 367                                 "'%s'\n",
 368                                 chan_info->channel_path);
 369                 return -1;
 370         }
 371         if (add_channel_to_monitor(&chan_info) < 0) {
 372                 RTE_LOG(ERR, CHANNEL_MANAGER, "Could add channel: "
 373                                 "'%s' to epoll ctl\n",
 374                                 chan_info->channel_path);
 375                 return -1;
 376
 377         }
 378         chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
 379         return 0;
 380 }
 381
 382 int
 383 add_all_channels(const char *vm_name)
 384 {
 385         DIR *d;
 386         struct dirent *dir;
 387         struct virtual_machine_info *vm_info;
 388         struct channel_info *chan_info;
 389         char *token, *remaining, *tail_ptr;
 390         char socket_name[PATH_MAX];
 391         unsigned channel_num;
 392         int num_channels_enabled = 0;
 393
 394         /* verify VM exists */
 395         vm_info = find_domain_by_name(vm_name);
 396         if (vm_info == NULL) {
 397                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' not found"
 398                                 " during channel discovery\n", vm_name);
 399                 return 0;
 400         }
 401         if (!virDomainIsActive(vm_info->domainPtr)) {
 402                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' is not active\n", vm_name);
 403                 vm_info->status = CHANNEL_MGR_VM_INACTIVE;
 404                 return 0;
 405         }
 406         d = opendir(CHANNEL_MGR_SOCKET_PATH);
 407         if (d == NULL) {
 408                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error opening directory '%s': %s\n",
 409                                 CHANNEL_MGR_SOCKET_PATH, strerror(errno));
 410                 return -1;
 411         }
 412         while ((dir = readdir(d)) != NULL) {
 413                 if (!strncmp(dir->d_name, ".", 1) ||
 414                                 !strncmp(dir->d_name, "..", 2))
 415                         continue;
 416
 417                 strlcpy(socket_name, dir->d_name, sizeof(socket_name));
 418                 remaining = socket_name;
 419                 /* Extract vm_name from "<vm_name>.<channel_num>" */
 420                 token = strsep(&remaining, ".");
 421                 if (remaining == NULL)
 422                         continue;
 423                 if (strncmp(vm_name, token, CHANNEL_MGR_MAX_NAME_LEN))
 424                         continue;
 425
 426                 /* remaining should contain only <channel_num> */
 427                 errno = 0;
 428                 channel_num = (unsigned)strtol(remaining, &tail_ptr, 0);
 429                 if ((errno != 0) || (remaining[0] == '\0') ||
 430                                 tail_ptr == NULL || (*tail_ptr != '\0')) {
 431                         RTE_LOG(WARNING, CHANNEL_MANAGER, "Malformed channel name"
 432                                         "'%s' found it should be in the form of "
 433                                         "'<guest_name>.<channel_num>(decimal)'\n",
 434                                         dir->d_name);
 435                         continue;
 436                 }
 437                 if (channel_num >= RTE_MAX_LCORE) {
 438                         RTE_LOG(WARNING, CHANNEL_MANAGER, "Channel number(%u) is "
 439                                         "greater than max allowable: %d, skipping '%s%s'\n",
 440                                         channel_num, RTE_MAX_LCORE-1,
 441                                         CHANNEL_MGR_SOCKET_PATH, dir->d_name);
 442                         continue;
 443                 }
 444                 /* if channel has not been added previously */
 445                 if (channel_exists(vm_info, channel_num))
 446                         continue;
 447
 448                 chan_info = rte_malloc(NULL, sizeof(*chan_info),
 449                                 RTE_CACHE_LINE_SIZE);
 450                 if (chan_info == NULL) {
 451                         RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
 452                                 "channel '%s%s'\n", CHANNEL_MGR_SOCKET_PATH, dir->d_name);
 453                         continue;
 454                 }
 455
 456                 snprintf(chan_info->channel_path,
 457                                 sizeof(chan_info->channel_path), "%s%s",
 458                                 CHANNEL_MGR_SOCKET_PATH, dir->d_name);
 459
 460                 if (setup_channel_info(&vm_info, &chan_info, channel_num) < 0) {
 461                         rte_free(chan_info);
 462                         continue;
 463                 }
 464
 465                 num_channels_enabled++;
 466         }
 467         closedir(d);
 468         return num_channels_enabled;
 469 }
 470
 471 int
 472 add_channels(const char *vm_name, unsigned *channel_list,
 473                 unsigned len_channel_list)
 474 {
 475         struct virtual_machine_info *vm_info;
 476         struct channel_info *chan_info;
 477         char socket_path[PATH_MAX];
 478         unsigned i;
 479         int num_channels_enabled = 0;
 480
 481         vm_info = find_domain_by_name(vm_name);
 482         if (vm_info == NULL) {
 483                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add channels: VM '%s' "
 484                                 "not found\n", vm_name);
 485                 return 0;
 486         }
 487
 488         if (!virDomainIsActive(vm_info->domainPtr)) {
 489                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' is not active\n", vm_name);
 490                 vm_info->status = CHANNEL_MGR_VM_INACTIVE;
 491                 return 0;
 492         }
 493
 494         for (i = 0; i < len_channel_list; i++) {
 495
 496                 if (channel_list[i] >= RTE_MAX_LCORE) {
 497                         RTE_LOG(INFO, CHANNEL_MANAGER, "Channel(%u) is out of range "
 498                                                         "0...%d\n", channel_list[i],
 499                                                         RTE_MAX_LCORE-1);
 500                         continue;
 501                 }
 502                 if (channel_exists(vm_info, channel_list[i])) {
 503                         RTE_LOG(INFO, CHANNEL_MANAGER, "Channel already exists, skipping  "
 504                                         "'%s.%u'\n", vm_name, i);
 505                         continue;
 506                 }
 507
 508                 snprintf(socket_path, sizeof(socket_path), "%s%s.%u",
 509                                 CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
 510                 errno = 0;
 511                 if (access(socket_path, F_OK) < 0) {
 512                         RTE_LOG(ERR, CHANNEL_MANAGER, "Channel path '%s' error: "
 513                                         "%s\n", socket_path, strerror(errno));
 514                         continue;
 515                 }
 516                 chan_info = rte_malloc(NULL, sizeof(*chan_info),
 517                                 RTE_CACHE_LINE_SIZE);
 518                 if (chan_info == NULL) {
 519                         RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
 520                                         "channel '%s'\n", socket_path);
 521                         continue;
 522                 }
 523                 snprintf(chan_info->channel_path,
 524                                 sizeof(chan_info->channel_path), "%s%s.%u",
 525                                 CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
 526                 if (setup_channel_info(&vm_info, &chan_info, channel_list[i]) < 0) {
 527                         rte_free(chan_info);
 528                         continue;
 529                 }
 530                 num_channels_enabled++;
 531
 532         }
 533         return num_channels_enabled;
 534 }
 535
 536 int
 537 add_host_channel(void)
 538 {
 539         struct channel_info *chan_info;
 540         char socket_path[PATH_MAX];
 541         int num_channels_enabled = 0;
 542         int ret;
 543
 544         fifo_path(socket_path, sizeof(socket_path));
 545
 546         ret = mkfifo(socket_path, 0660);
 547         if ((errno != EEXIST) && (ret < 0)) {
 548                 RTE_LOG(ERR, CHANNEL_MANAGER, "Cannot create fifo '%s' error: "
 549                                 "%s\n", socket_path, strerror(errno));
 550                 return 0;
 551         }
 552
 553         if (access(socket_path, F_OK) < 0) {
 554                 RTE_LOG(ERR, CHANNEL_MANAGER, "Channel path '%s' error: "
 555                                 "%s\n", socket_path, strerror(errno));
 556                 return 0;
 557         }
 558         chan_info = rte_malloc(NULL, sizeof(*chan_info), 0);
 559         if (chan_info == NULL) {
 560                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
 561                                 "channel '%s'\n", socket_path);
 562                 return 0;
 563         }
 564         rte_strlcpy(chan_info->channel_path, socket_path, UNIX_PATH_MAX);
 565
 566         if (setup_host_channel_info(&chan_info, 0) < 0) {
 567                 rte_free(chan_info);
 568                 return 0;
 569         }
 570         num_channels_enabled++;
 571
 572         return num_channels_enabled;
 573 }
 574
 575 int
 576 remove_channel(struct channel_info **chan_info_dptr)
 577 {
 578         struct virtual_machine_info *vm_info;
 579         struct channel_info *chan_info = *chan_info_dptr;
 580
 581         close(chan_info->fd);
 582
 583         vm_info = (struct virtual_machine_info *)chan_info->priv_info;
 584
 585         rte_spinlock_lock(&(vm_info->config_spinlock));
 586         vm_info->channel_mask[chan_info->channel_num] = 0;
 587         vm_info->num_channels--;
 588         rte_spinlock_unlock(&(vm_info->config_spinlock));
 589
 590         rte_free(chan_info);
 591         return 0;
 592 }
 593
 594 int
 595 set_channel_status_all(const char *vm_name, enum channel_status status)
 596 {
 597         struct virtual_machine_info *vm_info;
 598         unsigned i;
 599         char mask[RTE_MAX_LCORE];
 600         int num_channels_changed = 0;
 601
 602         if (!(status == CHANNEL_MGR_CHANNEL_CONNECTED ||
 603                         status == CHANNEL_MGR_CHANNEL_DISABLED)) {
 604                 RTE_LOG(ERR, CHANNEL_MANAGER, "Channels can only be enabled or "
 605                                 "disabled: Unable to change status for VM '%s'\n", vm_name);
 606         }
 607         vm_info = find_domain_by_name(vm_name);
 608         if (vm_info == NULL) {
 609                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to disable channels: VM '%s' "
 610                                 "not found\n", vm_name);
 611                 return 0;
 612         }
 613
 614         rte_spinlock_lock(&(vm_info->config_spinlock));
 615         memcpy(mask, (char *)vm_info->channel_mask, RTE_MAX_LCORE);
 616         for (i = 0; i < RTE_MAX_LCORE; i++) {
 617                 if (mask[i] != 1)
 618                         continue;
 619                 vm_info->channels[i]->status = status;
 620                 num_channels_changed++;
 621         }
 622         rte_spinlock_unlock(&(vm_info->config_spinlock));
 623         return num_channels_changed;
 624
 625 }
 626
 627 int
 628 set_channel_status(const char *vm_name, unsigned *channel_list,
 629                 unsigned len_channel_list, enum channel_status status)
 630 {
 631         struct virtual_machine_info *vm_info;
 632         unsigned i;
 633         int num_channels_changed = 0;
 634
 635         if (!(status == CHANNEL_MGR_CHANNEL_CONNECTED ||
 636                         status == CHANNEL_MGR_CHANNEL_DISABLED)) {
 637                 RTE_LOG(ERR, CHANNEL_MANAGER, "Channels can only be enabled or "
 638                                 "disabled: Unable to change status for VM '%s'\n", vm_name);
 639         }
 640         vm_info = find_domain_by_name(vm_name);
 641         if (vm_info == NULL) {
 642                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add channels: VM '%s' "
 643                                 "not found\n", vm_name);
 644                 return 0;
 645         }
 646         for (i = 0; i < len_channel_list; i++) {
 647                 if (channel_exists(vm_info, channel_list[i])) {
 648                         rte_spinlock_lock(&(vm_info->config_spinlock));
 649                         vm_info->channels[channel_list[i]]->status = status;
 650                         rte_spinlock_unlock(&(vm_info->config_spinlock));
 651                         num_channels_changed++;
 652                 }
 653         }
 654         return num_channels_changed;
 655 }
 656
 657 void
 658 get_all_vm(int *num_vm, int *num_vcpu)
 659 {
 660
 661         virNodeInfo node_info;
 662         virDomainPtr *domptr;
 663         int i, ii, numVcpus[MAX_VCPUS], n_vcpus;
 664         unsigned int jj;
 665         const char *vm_name;
 666         unsigned int domain_flags = VIR_CONNECT_LIST_DOMAINS_RUNNING |
 667                                 VIR_CONNECT_LIST_DOMAINS_PERSISTENT;
 668         unsigned int domain_flag = VIR_DOMAIN_VCPU_CONFIG;
 669
 670         if (!global_hypervisor_available)
 671                 return;
 672
 673         memset(global_cpumaps, 0, RTE_MAX_LCORE*global_maplen);
 674         if (virNodeGetInfo(global_vir_conn_ptr, &node_info)) {
 675                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
 676                 return;
 677         }
 678
 679         /* Returns number of pcpus */
 680         global_n_host_cpus = (unsigned int)node_info.cpus;
 681
 682         /* Returns number of active domains */
 683         *num_vm = virConnectListAllDomains(global_vir_conn_ptr, &domptr,
 684                                         domain_flags);
 685         if (*num_vm <= 0) {
 686                 RTE_LOG(ERR, CHANNEL_MANAGER, "No Active Domains Running\n");
 687                 return;
 688         }
 689
 690         for (i = 0; i < *num_vm; i++) {
 691
 692                 /* Get Domain Names */
 693                 vm_name = virDomainGetName(domptr[i]);
 694                 lvm_info[i].vm_name = vm_name;
 695
 696                 /* Get Number of Vcpus */
 697                 numVcpus[i] = virDomainGetVcpusFlags(domptr[i], domain_flag);
 698
 699                 /* Get Number of VCpus & VcpuPinInfo */
 700                 n_vcpus = virDomainGetVcpuPinInfo(domptr[i],
 701                                 numVcpus[i], global_cpumaps,
 702                                 global_maplen, domain_flag);
 703
 704                 if ((int)n_vcpus > 0) {
 705                         *num_vcpu = n_vcpus;
 706                         lvm_info[i].num_cpus = n_vcpus;
 707                 }
 708
 709                 /* Save pcpu in use by libvirt VMs */
 710                 for (ii = 0; ii < n_vcpus; ii++) {
 711                         for (jj = 0; jj < global_n_host_cpus; jj++) {
 712                                 if (VIR_CPU_USABLE(global_cpumaps,
 713                                                 global_maplen, ii, jj) > 0) {
 714                                         lvm_info[i].pcpus[ii] = jj;
 715                                 }
 716                         }
 717                 }
 718         }
 719 }
 720
 721 int
 722 get_info_vm(const char *vm_name, struct vm_info *info)
 723 {
 724         struct virtual_machine_info *vm_info;
 725         unsigned i, channel_num = 0;
 726         char mask[RTE_MAX_LCORE];
 727
 728         vm_info = find_domain_by_name(vm_name);
 729         if (vm_info == NULL) {
 730                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM '%s' not found\n", vm_name);
 731                 return -1;
 732         }
 733         info->status = CHANNEL_MGR_VM_ACTIVE;
 734         if (!virDomainIsActive(vm_info->domainPtr))
 735                 info->status = CHANNEL_MGR_VM_INACTIVE;
 736
 737         rte_spinlock_lock(&(vm_info->config_spinlock));
 738
 739         memcpy(mask, (char *)vm_info->channel_mask, RTE_MAX_LCORE);
 740         for (i = 0; i < RTE_MAX_LCORE; i++) {
 741                 if (mask[i] != 1)
 742                         continue;
 743                 info->channels[channel_num].channel_num = i;
 744                 memcpy(info->channels[channel_num].channel_path,
 745                                 vm_info->channels[i]->channel_path,
 746                                 UNIX_PATH_MAX);
 747                 info->channels[channel_num].status =
 748                                 vm_info->channels[i]->status;
 749                 info->channels[channel_num].fd =
 750                                 vm_info->channels[i]->fd;
 751                 channel_num++;
 752         }
 753
 754         info->num_channels = channel_num;
 755         info->num_vcpus = vm_info->info.nrVirtCpu;
 756         rte_spinlock_unlock(&(vm_info->config_spinlock));
 757
 758         memcpy(info->name, vm_info->name, sizeof(vm_info->name));
 759         rte_spinlock_lock(&(vm_info->config_spinlock));
 760         for (i = 0; i < info->num_vcpus; i++) {
 761                 info->pcpu_map[i] = vm_info->pcpu_map[i];
 762         }
 763         rte_spinlock_unlock(&(vm_info->config_spinlock));
 764         return 0;
 765 }
 766
 767 int
 768 add_vm(const char *vm_name)
 769 {
 770         struct virtual_machine_info *new_domain;
 771         virDomainPtr dom_ptr;
 772         int i;
 773
 774         if (find_domain_by_name(vm_name) != NULL) {
 775                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add VM: VM '%s' "
 776                                 "already exists\n", vm_name);
 777                 return -1;
 778         }
 779
 780         if (global_vir_conn_ptr == NULL) {
 781                 RTE_LOG(ERR, CHANNEL_MANAGER, "No connection to hypervisor exists\n");
 782                 return -1;
 783         }
 784         dom_ptr = virDomainLookupByName(global_vir_conn_ptr, vm_name);
 785         if (dom_ptr == NULL) {
 786                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error on VM lookup with libvirt: "
 787                                 "VM '%s' not found\n", vm_name);
 788                 return -1;
 789         }
 790
 791         new_domain = rte_malloc("virtual_machine_info", sizeof(*new_domain),
 792                         RTE_CACHE_LINE_SIZE);
 793         if (new_domain == NULL) {
 794                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to allocate memory for VM "
 795                                 "info\n");
 796                 return -1;
 797         }
 798         new_domain->domainPtr = dom_ptr;
 799         if (virDomainGetInfo(new_domain->domainPtr, &new_domain->info) != 0) {
 800                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to get libvirt VM info\n");
 801                 rte_free(new_domain);
 802                 return -1;
 803         }
 804         if (new_domain->info.nrVirtCpu > RTE_MAX_LCORE) {
 805                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error the number of virtual CPUs(%u) is "
 806                                 "greater than allowable(%d)\n", new_domain->info.nrVirtCpu,
 807                                 RTE_MAX_LCORE);
 808                 rte_free(new_domain);
 809                 return -1;
 810         }
 811
 812         for (i = 0; i < RTE_MAX_LCORE; i++)
 813                 new_domain->pcpu_map[i] = 0;
 814
 815         if (update_pcpus_mask(new_domain) < 0) {
 816                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting physical CPU pinning\n");
 817                 rte_free(new_domain);
 818                 return -1;
 819         }
 820         strncpy(new_domain->name, vm_name, sizeof(new_domain->name));
 821         new_domain->name[sizeof(new_domain->name) - 1] = '\0';
 822         memset(new_domain->channel_mask, 0, RTE_MAX_LCORE);
 823         new_domain->num_channels = 0;
 824
 825         if (!virDomainIsActive(dom_ptr))
 826                 new_domain->status = CHANNEL_MGR_VM_INACTIVE;
 827         else
 828                 new_domain->status = CHANNEL_MGR_VM_ACTIVE;
 829
 830         rte_spinlock_init(&(new_domain->config_spinlock));
 831         LIST_INSERT_HEAD(&vm_list_head, new_domain, vms_info);
 832         return 0;
 833 }
 834
 835 int
 836 remove_vm(const char *vm_name)
 837 {
 838         struct virtual_machine_info *vm_info = find_domain_by_name(vm_name);
 839
 840         if (vm_info == NULL) {
 841                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM: VM '%s' "
 842                                 "not found\n", vm_name);
 843                 return -1;
 844         }
 845         rte_spinlock_lock(&vm_info->config_spinlock);
 846         if (vm_info->num_channels != 0) {
 847                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM '%s', there are "
 848                                 "%"PRId8" channels still active\n",
 849                                 vm_name, vm_info->num_channels);
 850                 rte_spinlock_unlock(&vm_info->config_spinlock);
 851                 return -1;
 852         }
 853         LIST_REMOVE(vm_info, vms_info);
 854         rte_spinlock_unlock(&vm_info->config_spinlock);
 855         rte_free(vm_info);
 856         return 0;
 857 }
 858
 859 static void
 860 disconnect_hypervisor(void)
 861 {
 862         if (global_vir_conn_ptr != NULL) {
 863                 virConnectClose(global_vir_conn_ptr);
 864                 global_vir_conn_ptr = NULL;
 865         }
 866 }
 867
 868 static int
 869 connect_hypervisor(const char *path)
 870 {
 871         if (global_vir_conn_ptr != NULL) {
 872                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error connecting to %s, connection "
 873                                 "already established\n", path);
 874                 return -1;
 875         }
 876         global_vir_conn_ptr = virConnectOpen(path);
 877         if (global_vir_conn_ptr == NULL) {
 878                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error failed to open connection to "
 879                                 "Hypervisor '%s'\n", path);
 880                 return -1;
 881         }
 882         return 0;
 883 }
 884 int
 885 channel_manager_init(const char *path __rte_unused)
 886 {
 887         virNodeInfo info;
 888
 889         LIST_INIT(&vm_list_head);
 890         if (connect_hypervisor(path) < 0) {
 891                 global_n_host_cpus = 64;
 892                 global_hypervisor_available = 0;
 893                 RTE_LOG(INFO, CHANNEL_MANAGER, "Unable to initialize channel manager\n");
 894         } else {
 895                 global_hypervisor_available = 1;
 896
 897                 global_maplen = VIR_CPU_MAPLEN(RTE_MAX_LCORE);
 898
 899                 global_vircpuinfo = rte_zmalloc(NULL,
 900                                 sizeof(*global_vircpuinfo) *
 901                                 RTE_MAX_LCORE, RTE_CACHE_LINE_SIZE);
 902                 if (global_vircpuinfo == NULL) {
 903                         RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for CPU Info\n");
 904                         goto error;
 905                 }
 906                 global_cpumaps = rte_zmalloc(NULL,
 907                                 RTE_MAX_LCORE * global_maplen,
 908                                 RTE_CACHE_LINE_SIZE);
 909                 if (global_cpumaps == NULL)
 910                         goto error;
 911
 912                 if (virNodeGetInfo(global_vir_conn_ptr, &info)) {
 913                         RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
 914                         goto error;
 915                 }
 916                 global_n_host_cpus = (unsigned int)info.cpus;
 917         }
 918
 919
 920
 921         if (global_n_host_cpus > RTE_MAX_LCORE) {
 922                 RTE_LOG(WARNING, CHANNEL_MANAGER, "The number of host CPUs(%u) exceeds the "
 923                                 "maximum of %u. No cores over %u should be used.\n",
 924                                 global_n_host_cpus, RTE_MAX_LCORE,
 925                                 RTE_MAX_LCORE - 1);
 926                 global_n_host_cpus = RTE_MAX_LCORE;
 927         }
 928
 929         return 0;
 930 error:
 931         if (global_hypervisor_available)
 932                 disconnect_hypervisor();
 933         return -1;
 934 }
 935
 936 void
 937 channel_manager_exit(void)
 938 {
 939         unsigned i;
 940         char mask[RTE_MAX_LCORE];
 941         struct virtual_machine_info *vm_info;
 942
 943         LIST_FOREACH(vm_info, &vm_list_head, vms_info) {
 944
 945                 rte_spinlock_lock(&(vm_info->config_spinlock));
 946
 947                 memcpy(mask, (char *)vm_info->channel_mask, RTE_MAX_LCORE);
 948                 for (i = 0; i < RTE_MAX_LCORE; i++) {
 949                         if (mask[i] != 1)
 950                                 continue;
 951                         remove_channel_from_monitor(
 952                                         vm_info->channels[i]);
 953                         close(vm_info->channels[i]->fd);
 954                         rte_free(vm_info->channels[i]);
 955                 }
 956                 rte_spinlock_unlock(&(vm_info->config_spinlock));
 957
 958                 LIST_REMOVE(vm_info, vms_info);
 959                 rte_free(vm_info);
 960         }
 961
 962         if (global_hypervisor_available) {
 963                 /* Only needed if hypervisor available */
 964                 rte_free(global_cpumaps);
 965                 rte_free(global_vircpuinfo);
 966                 disconnect_hypervisor();
 967         }
 968 }