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[CHANNEL_CMDS_MAX_CPUS];
  54         struct channel_info *channels[CHANNEL_CMDS_MAX_VM_CHANNELS];
  55         char channel_mask[POWER_MGR_MAX_CPUS];
  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, CHANNEL_CMDS_MAX_CPUS*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                         CHANNEL_CMDS_MAX_CPUS);
 100
 101         cpuinfo = global_vircpuinfo;
 102
 103         n_vcpus = virDomainGetVcpus(vm_info->domainPtr, cpuinfo,
 104                         CHANNEL_CMDS_MAX_CPUS, 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 >= CHANNEL_CMDS_MAX_CPUS) {
 112                 RTE_LOG(ERR, CHANNEL_MANAGER, "Number of vCPUS(%u) is out of range "
 113                                 "0...%d\n", n_vcpus, CHANNEL_CMDS_MAX_CPUS-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 >= CHANNEL_CMDS_MAX_CPUS) {
 142                 RTE_LOG(ERR, CHANNEL_MANAGER, "vCPU(%u) exceeds max allowable(%d)\n",
 143                                 vcpu, CHANNEL_CMDS_MAX_CPUS-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 , CHANNEL_CMDS_MAX_CPUS * 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         fifo_path(chan_info->channel_path, sizeof(chan_info->channel_path));
 366
 367         if (open_host_channel(chan_info) < 0) {
 368                 RTE_LOG(ERR, CHANNEL_MANAGER, "Could not open host channel: "
 369                                 "'%s'\n",
 370                                 chan_info->channel_path);
 371                 return -1;
 372         }
 373         if (add_channel_to_monitor(&chan_info) < 0) {
 374                 RTE_LOG(ERR, CHANNEL_MANAGER, "Could add channel: "
 375                                 "'%s' to epoll ctl\n",
 376                                 chan_info->channel_path);
 377                 return -1;
 378
 379         }
 380         chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
 381         return 0;
 382 }
 383
 384 int
 385 add_all_channels(const char *vm_name)
 386 {
 387         DIR *d;
 388         struct dirent *dir;
 389         struct virtual_machine_info *vm_info;
 390         struct channel_info *chan_info;
 391         char *token, *remaining, *tail_ptr;
 392         char socket_name[PATH_MAX];
 393         unsigned channel_num;
 394         int num_channels_enabled = 0;
 395
 396         /* verify VM exists */
 397         vm_info = find_domain_by_name(vm_name);
 398         if (vm_info == NULL) {
 399                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' not found"
 400                                 " during channel discovery\n", vm_name);
 401                 return 0;
 402         }
 403         if (!virDomainIsActive(vm_info->domainPtr)) {
 404                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' is not active\n", vm_name);
 405                 vm_info->status = CHANNEL_MGR_VM_INACTIVE;
 406                 return 0;
 407         }
 408         d = opendir(CHANNEL_MGR_SOCKET_PATH);
 409         if (d == NULL) {
 410                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error opening directory '%s': %s\n",
 411                                 CHANNEL_MGR_SOCKET_PATH, strerror(errno));
 412                 return -1;
 413         }
 414         while ((dir = readdir(d)) != NULL) {
 415                 if (!strncmp(dir->d_name, ".", 1) ||
 416                                 !strncmp(dir->d_name, "..", 2))
 417                         continue;
 418
 419                 strlcpy(socket_name, dir->d_name, sizeof(socket_name));
 420                 remaining = socket_name;
 421                 /* Extract vm_name from "<vm_name>.<channel_num>" */
 422                 token = strsep(&remaining, ".");
 423                 if (remaining == NULL)
 424                         continue;
 425                 if (strncmp(vm_name, token, CHANNEL_MGR_MAX_NAME_LEN))
 426                         continue;
 427
 428                 /* remaining should contain only <channel_num> */
 429                 errno = 0;
 430                 channel_num = (unsigned)strtol(remaining, &tail_ptr, 0);
 431                 if ((errno != 0) || (remaining[0] == '\0') ||
 432                                 tail_ptr == NULL || (*tail_ptr != '\0')) {
 433                         RTE_LOG(WARNING, CHANNEL_MANAGER, "Malformed channel name"
 434                                         "'%s' found it should be in the form of "
 435                                         "'<guest_name>.<channel_num>(decimal)'\n",
 436                                         dir->d_name);
 437                         continue;
 438                 }
 439                 if (channel_num >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
 440                         RTE_LOG(WARNING, CHANNEL_MANAGER, "Channel number(%u) is "
 441                                         "greater than max allowable: %d, skipping '%s%s'\n",
 442                                         channel_num, CHANNEL_CMDS_MAX_VM_CHANNELS-1,
 443                                         CHANNEL_MGR_SOCKET_PATH, dir->d_name);
 444                         continue;
 445                 }
 446                 /* if channel has not been added previously */
 447                 if (channel_exists(vm_info, channel_num))
 448                         continue;
 449
 450                 chan_info = rte_malloc(NULL, sizeof(*chan_info),
 451                                 RTE_CACHE_LINE_SIZE);
 452                 if (chan_info == NULL) {
 453                         RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
 454                                 "channel '%s%s'\n", CHANNEL_MGR_SOCKET_PATH, dir->d_name);
 455                         continue;
 456                 }
 457
 458                 snprintf(chan_info->channel_path,
 459                                 sizeof(chan_info->channel_path), "%s%s",
 460                                 CHANNEL_MGR_SOCKET_PATH, dir->d_name);
 461
 462                 if (setup_channel_info(&vm_info, &chan_info, channel_num) < 0) {
 463                         rte_free(chan_info);
 464                         continue;
 465                 }
 466
 467                 num_channels_enabled++;
 468         }
 469         closedir(d);
 470         return num_channels_enabled;
 471 }
 472
 473 int
 474 add_channels(const char *vm_name, unsigned *channel_list,
 475                 unsigned len_channel_list)
 476 {
 477         struct virtual_machine_info *vm_info;
 478         struct channel_info *chan_info;
 479         char socket_path[PATH_MAX];
 480         unsigned i;
 481         int num_channels_enabled = 0;
 482
 483         vm_info = find_domain_by_name(vm_name);
 484         if (vm_info == NULL) {
 485                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add channels: VM '%s' "
 486                                 "not found\n", vm_name);
 487                 return 0;
 488         }
 489
 490         if (!virDomainIsActive(vm_info->domainPtr)) {
 491                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' is not active\n", vm_name);
 492                 vm_info->status = CHANNEL_MGR_VM_INACTIVE;
 493                 return 0;
 494         }
 495
 496         for (i = 0; i < len_channel_list; i++) {
 497
 498                 if (channel_list[i] >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
 499                         RTE_LOG(INFO, CHANNEL_MANAGER, "Channel(%u) is out of range "
 500                                                         "0...%d\n", channel_list[i],
 501                                                         CHANNEL_CMDS_MAX_VM_CHANNELS-1);
 502                         continue;
 503                 }
 504                 if (channel_exists(vm_info, channel_list[i])) {
 505                         RTE_LOG(INFO, CHANNEL_MANAGER, "Channel already exists, skipping  "
 506                                         "'%s.%u'\n", vm_name, i);
 507                         continue;
 508                 }
 509
 510                 snprintf(socket_path, sizeof(socket_path), "%s%s.%u",
 511                                 CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
 512                 errno = 0;
 513                 if (access(socket_path, F_OK) < 0) {
 514                         RTE_LOG(ERR, CHANNEL_MANAGER, "Channel path '%s' error: "
 515                                         "%s\n", socket_path, strerror(errno));
 516                         continue;
 517                 }
 518                 chan_info = rte_malloc(NULL, sizeof(*chan_info),
 519                                 RTE_CACHE_LINE_SIZE);
 520                 if (chan_info == NULL) {
 521                         RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
 522                                         "channel '%s'\n", socket_path);
 523                         continue;
 524                 }
 525                 snprintf(chan_info->channel_path,
 526                                 sizeof(chan_info->channel_path), "%s%s.%u",
 527                                 CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
 528                 if (setup_channel_info(&vm_info, &chan_info, channel_list[i]) < 0) {
 529                         rte_free(chan_info);
 530                         continue;
 531                 }
 532                 num_channels_enabled++;
 533
 534         }
 535         return num_channels_enabled;
 536 }
 537
 538 int
 539 add_host_channel(void)
 540 {
 541         struct channel_info *chan_info;
 542         char socket_path[PATH_MAX];
 543         int num_channels_enabled = 0;
 544         int ret;
 545
 546         fifo_path(socket_path, sizeof(socket_path));
 547
 548         ret = mkfifo(socket_path, 0660);
 549         if ((errno != EEXIST) && (ret < 0)) {
 550                 RTE_LOG(ERR, CHANNEL_MANAGER, "Cannot create fifo '%s' error: "
 551                                 "%s\n", socket_path, strerror(errno));
 552                 return 0;
 553         }
 554
 555         if (access(socket_path, F_OK) < 0) {
 556                 RTE_LOG(ERR, CHANNEL_MANAGER, "Channel path '%s' error: "
 557                                 "%s\n", socket_path, strerror(errno));
 558                 return 0;
 559         }
 560         chan_info = rte_malloc(NULL, sizeof(*chan_info), 0);
 561         if (chan_info == NULL) {
 562                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
 563                                 "channel '%s'\n", socket_path);
 564                 return 0;
 565         }
 566         strlcpy(chan_info->channel_path, socket_path,
 567                 sizeof(chan_info->channel_path));
 568         if (setup_host_channel_info(&chan_info, 0) < 0) {
 569                 rte_free(chan_info);
 570                 return 0;
 571         }
 572         num_channels_enabled++;
 573
 574         return num_channels_enabled;
 575 }
 576
 577 int
 578 remove_channel(struct channel_info **chan_info_dptr)
 579 {
 580         struct virtual_machine_info *vm_info;
 581         struct channel_info *chan_info = *chan_info_dptr;
 582
 583         close(chan_info->fd);
 584
 585         vm_info = (struct virtual_machine_info *)chan_info->priv_info;
 586
 587         rte_spinlock_lock(&(vm_info->config_spinlock));
 588         vm_info->channel_mask[chan_info->channel_num] = 0;
 589         vm_info->num_channels--;
 590         rte_spinlock_unlock(&(vm_info->config_spinlock));
 591
 592         rte_free(chan_info);
 593         return 0;
 594 }
 595
 596 int
 597 set_channel_status_all(const char *vm_name, enum channel_status status)
 598 {
 599         struct virtual_machine_info *vm_info;
 600         unsigned i;
 601         char mask[POWER_MGR_MAX_CPUS];
 602         int num_channels_changed = 0;
 603
 604         if (!(status == CHANNEL_MGR_CHANNEL_CONNECTED ||
 605                         status == CHANNEL_MGR_CHANNEL_DISABLED)) {
 606                 RTE_LOG(ERR, CHANNEL_MANAGER, "Channels can only be enabled or "
 607                                 "disabled: Unable to change status for VM '%s'\n", vm_name);
 608         }
 609         vm_info = find_domain_by_name(vm_name);
 610         if (vm_info == NULL) {
 611                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to disable channels: VM '%s' "
 612                                 "not found\n", vm_name);
 613                 return 0;
 614         }
 615
 616         rte_spinlock_lock(&(vm_info->config_spinlock));
 617         memcpy(mask, (char *)vm_info->channel_mask, POWER_MGR_MAX_CPUS);
 618         for (i = 0; i < POWER_MGR_MAX_CPUS; i++) {
 619                 if (mask[i] != 1)
 620                         continue;
 621                 vm_info->channels[i]->status = status;
 622                 num_channels_changed++;
 623         }
 624         rte_spinlock_unlock(&(vm_info->config_spinlock));
 625         return num_channels_changed;
 626
 627 }
 628
 629 int
 630 set_channel_status(const char *vm_name, unsigned *channel_list,
 631                 unsigned len_channel_list, enum channel_status status)
 632 {
 633         struct virtual_machine_info *vm_info;
 634         unsigned i;
 635         int num_channels_changed = 0;
 636
 637         if (!(status == CHANNEL_MGR_CHANNEL_CONNECTED ||
 638                         status == CHANNEL_MGR_CHANNEL_DISABLED)) {
 639                 RTE_LOG(ERR, CHANNEL_MANAGER, "Channels can only be enabled or "
 640                                 "disabled: Unable to change status for VM '%s'\n", vm_name);
 641         }
 642         vm_info = find_domain_by_name(vm_name);
 643         if (vm_info == NULL) {
 644                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add channels: VM '%s' "
 645                                 "not found\n", vm_name);
 646                 return 0;
 647         }
 648         for (i = 0; i < len_channel_list; i++) {
 649                 if (channel_exists(vm_info, channel_list[i])) {
 650                         rte_spinlock_lock(&(vm_info->config_spinlock));
 651                         vm_info->channels[channel_list[i]]->status = status;
 652                         rte_spinlock_unlock(&(vm_info->config_spinlock));
 653                         num_channels_changed++;
 654                 }
 655         }
 656         return num_channels_changed;
 657 }
 658
 659 void
 660 get_all_vm(int *num_vm, int *num_vcpu)
 661 {
 662
 663         virNodeInfo node_info;
 664         virDomainPtr *domptr;
 665         int i, ii, numVcpus[MAX_VCPUS], n_vcpus;
 666         unsigned int jj;
 667         const char *vm_name;
 668         unsigned int domain_flags = VIR_CONNECT_LIST_DOMAINS_RUNNING |
 669                                 VIR_CONNECT_LIST_DOMAINS_PERSISTENT;
 670         unsigned int domain_flag = VIR_DOMAIN_VCPU_CONFIG;
 671
 672         if (!global_hypervisor_available)
 673                 return;
 674
 675         memset(global_cpumaps, 0, CHANNEL_CMDS_MAX_CPUS*global_maplen);
 676         if (virNodeGetInfo(global_vir_conn_ptr, &node_info)) {
 677                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
 678                 return;
 679         }
 680
 681         /* Returns number of pcpus */
 682         global_n_host_cpus = (unsigned int)node_info.cpus;
 683
 684         /* Returns number of active domains */
 685         *num_vm = virConnectListAllDomains(global_vir_conn_ptr, &domptr,
 686                                         domain_flags);
 687         if (*num_vm <= 0) {
 688                 RTE_LOG(ERR, CHANNEL_MANAGER, "No Active Domains Running\n");
 689                 return;
 690         }
 691
 692         for (i = 0; i < *num_vm; i++) {
 693
 694                 /* Get Domain Names */
 695                 vm_name = virDomainGetName(domptr[i]);
 696                 lvm_info[i].vm_name = vm_name;
 697
 698                 /* Get Number of Vcpus */
 699                 numVcpus[i] = virDomainGetVcpusFlags(domptr[i], domain_flag);
 700
 701                 /* Get Number of VCpus & VcpuPinInfo */
 702                 n_vcpus = virDomainGetVcpuPinInfo(domptr[i],
 703                                 numVcpus[i], global_cpumaps,
 704                                 global_maplen, domain_flag);
 705
 706                 if ((int)n_vcpus > 0) {
 707                         *num_vcpu = n_vcpus;
 708                         lvm_info[i].num_cpus = n_vcpus;
 709                 }
 710
 711                 /* Save pcpu in use by libvirt VMs */
 712                 for (ii = 0; ii < n_vcpus; ii++) {
 713                         for (jj = 0; jj < global_n_host_cpus; jj++) {
 714                                 if (VIR_CPU_USABLE(global_cpumaps,
 715                                                 global_maplen, ii, jj) > 0) {
 716                                         lvm_info[i].pcpus[ii] = jj;
 717                                 }
 718                         }
 719                 }
 720         }
 721 }
 722
 723 int
 724 get_info_vm(const char *vm_name, struct vm_info *info)
 725 {
 726         struct virtual_machine_info *vm_info;
 727         unsigned i, channel_num = 0;
 728         char mask[POWER_MGR_MAX_CPUS];
 729
 730         vm_info = find_domain_by_name(vm_name);
 731         if (vm_info == NULL) {
 732                 RTE_LOG(ERR, CHANNEL_MANAGER, "VM '%s' not found\n", vm_name);
 733                 return -1;
 734         }
 735         info->status = CHANNEL_MGR_VM_ACTIVE;
 736         if (!virDomainIsActive(vm_info->domainPtr))
 737                 info->status = CHANNEL_MGR_VM_INACTIVE;
 738
 739         rte_spinlock_lock(&(vm_info->config_spinlock));
 740
 741         memcpy(mask, (char *)vm_info->channel_mask, POWER_MGR_MAX_CPUS);
 742         for (i = 0; i < POWER_MGR_MAX_CPUS; i++) {
 743                 if (mask[i] != 1)
 744                         continue;
 745                 info->channels[channel_num].channel_num = i;
 746                 memcpy(info->channels[channel_num].channel_path,
 747                                 vm_info->channels[i]->channel_path,
 748                                 UNIX_PATH_MAX);
 749                 info->channels[channel_num].status =
 750                                 vm_info->channels[i]->status;
 751                 info->channels[channel_num].fd =
 752                                 vm_info->channels[i]->fd;
 753                 channel_num++;
 754         }
 755
 756         info->num_channels = channel_num;
 757         info->num_vcpus = vm_info->info.nrVirtCpu;
 758         rte_spinlock_unlock(&(vm_info->config_spinlock));
 759
 760         memcpy(info->name, vm_info->name, sizeof(vm_info->name));
 761         rte_spinlock_lock(&(vm_info->config_spinlock));
 762         for (i = 0; i < info->num_vcpus; i++) {
 763                 info->pcpu_map[i] = vm_info->pcpu_map[i];
 764         }
 765         rte_spinlock_unlock(&(vm_info->config_spinlock));
 766         return 0;
 767 }
 768
 769 int
 770 add_vm(const char *vm_name)
 771 {
 772         struct virtual_machine_info *new_domain;
 773         virDomainPtr dom_ptr;
 774         int i;
 775
 776         if (find_domain_by_name(vm_name) != NULL) {
 777                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add VM: VM '%s' "
 778                                 "already exists\n", vm_name);
 779                 return -1;
 780         }
 781
 782         if (global_vir_conn_ptr == NULL) {
 783                 RTE_LOG(ERR, CHANNEL_MANAGER, "No connection to hypervisor exists\n");
 784                 return -1;
 785         }
 786         dom_ptr = virDomainLookupByName(global_vir_conn_ptr, vm_name);
 787         if (dom_ptr == NULL) {
 788                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error on VM lookup with libvirt: "
 789                                 "VM '%s' not found\n", vm_name);
 790                 return -1;
 791         }
 792
 793         new_domain = rte_malloc("virtual_machine_info", sizeof(*new_domain),
 794                         RTE_CACHE_LINE_SIZE);
 795         if (new_domain == NULL) {
 796                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to allocate memory for VM "
 797                                 "info\n");
 798                 return -1;
 799         }
 800         new_domain->domainPtr = dom_ptr;
 801         if (virDomainGetInfo(new_domain->domainPtr, &new_domain->info) != 0) {
 802                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to get libvirt VM info\n");
 803                 rte_free(new_domain);
 804                 return -1;
 805         }
 806         if (new_domain->info.nrVirtCpu > CHANNEL_CMDS_MAX_CPUS) {
 807                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error the number of virtual CPUs(%u) is "
 808                                 "greater than allowable(%d)\n", new_domain->info.nrVirtCpu,
 809                                 CHANNEL_CMDS_MAX_CPUS);
 810                 rte_free(new_domain);
 811                 return -1;
 812         }
 813
 814         for (i = 0; i < CHANNEL_CMDS_MAX_CPUS; i++) {
 815                 new_domain->pcpu_map[i] = 0;
 816         }
 817         if (update_pcpus_mask(new_domain) < 0) {
 818                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting physical CPU pinning\n");
 819                 rte_free(new_domain);
 820                 return -1;
 821         }
 822         strncpy(new_domain->name, vm_name, sizeof(new_domain->name));
 823         new_domain->name[sizeof(new_domain->name) - 1] = '\0';
 824         memset(new_domain->channel_mask, 0, POWER_MGR_MAX_CPUS);
 825         new_domain->num_channels = 0;
 826
 827         if (!virDomainIsActive(dom_ptr))
 828                 new_domain->status = CHANNEL_MGR_VM_INACTIVE;
 829         else
 830                 new_domain->status = CHANNEL_MGR_VM_ACTIVE;
 831
 832         rte_spinlock_init(&(new_domain->config_spinlock));
 833         LIST_INSERT_HEAD(&vm_list_head, new_domain, vms_info);
 834         return 0;
 835 }
 836
 837 int
 838 remove_vm(const char *vm_name)
 839 {
 840         struct virtual_machine_info *vm_info = find_domain_by_name(vm_name);
 841
 842         if (vm_info == NULL) {
 843                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM: VM '%s' "
 844                                 "not found\n", vm_name);
 845                 return -1;
 846         }
 847         rte_spinlock_lock(&vm_info->config_spinlock);
 848         if (vm_info->num_channels != 0) {
 849                 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM '%s', there are "
 850                                 "%"PRId8" channels still active\n",
 851                                 vm_name, vm_info->num_channels);
 852                 rte_spinlock_unlock(&vm_info->config_spinlock);
 853                 return -1;
 854         }
 855         LIST_REMOVE(vm_info, vms_info);
 856         rte_spinlock_unlock(&vm_info->config_spinlock);
 857         rte_free(vm_info);
 858         return 0;
 859 }
 860
 861 static void
 862 disconnect_hypervisor(void)
 863 {
 864         if (global_vir_conn_ptr != NULL) {
 865                 virConnectClose(global_vir_conn_ptr);
 866                 global_vir_conn_ptr = NULL;
 867         }
 868 }
 869
 870 static int
 871 connect_hypervisor(const char *path)
 872 {
 873         if (global_vir_conn_ptr != NULL) {
 874                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error connecting to %s, connection "
 875                                 "already established\n", path);
 876                 return -1;
 877         }
 878         global_vir_conn_ptr = virConnectOpen(path);
 879         if (global_vir_conn_ptr == NULL) {
 880                 RTE_LOG(ERR, CHANNEL_MANAGER, "Error failed to open connection to "
 881                                 "Hypervisor '%s'\n", path);
 882                 return -1;
 883         }
 884         return 0;
 885 }
 886 int
 887 channel_manager_init(const char *path __rte_unused)
 888 {
 889         virNodeInfo info;
 890
 891         LIST_INIT(&vm_list_head);
 892         if (connect_hypervisor(path) < 0) {
 893                 global_n_host_cpus = 64;
 894                 global_hypervisor_available = 0;
 895                 RTE_LOG(INFO, CHANNEL_MANAGER, "Unable to initialize channel manager\n");
 896         } else {
 897                 global_hypervisor_available = 1;
 898
 899                 global_maplen = VIR_CPU_MAPLEN(CHANNEL_CMDS_MAX_CPUS);
 900
 901                 global_vircpuinfo = rte_zmalloc(NULL,
 902                                 sizeof(*global_vircpuinfo) *
 903                                 CHANNEL_CMDS_MAX_CPUS, RTE_CACHE_LINE_SIZE);
 904                 if (global_vircpuinfo == NULL) {
 905                         RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for CPU Info\n");
 906                         goto error;
 907                 }
 908                 global_cpumaps = rte_zmalloc(NULL,
 909                                 CHANNEL_CMDS_MAX_CPUS * global_maplen,
 910                                 RTE_CACHE_LINE_SIZE);
 911                 if (global_cpumaps == NULL)
 912                         goto error;
 913
 914                 if (virNodeGetInfo(global_vir_conn_ptr, &info)) {
 915                         RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
 916                         goto error;
 917                 }
 918                 global_n_host_cpus = (unsigned int)info.cpus;
 919         }
 920
 921
 922
 923         if (global_n_host_cpus > CHANNEL_CMDS_MAX_CPUS) {
 924                 RTE_LOG(WARNING, CHANNEL_MANAGER, "The number of host CPUs(%u) exceeds the "
 925                                 "maximum of %u. No cores over %u should be used.\n",
 926                                 global_n_host_cpus, CHANNEL_CMDS_MAX_CPUS,
 927                                 CHANNEL_CMDS_MAX_CPUS - 1);
 928                 global_n_host_cpus = CHANNEL_CMDS_MAX_CPUS;
 929         }
 930
 931         return 0;
 932 error:
 933         if (global_hypervisor_available)
 934                 disconnect_hypervisor();
 935         return -1;
 936 }
 937
 938 void
 939 channel_manager_exit(void)
 940 {
 941         unsigned i;
 942         char mask[POWER_MGR_MAX_CPUS];
 943         struct virtual_machine_info *vm_info;
 944
 945         LIST_FOREACH(vm_info, &vm_list_head, vms_info) {
 946
 947                 rte_spinlock_lock(&(vm_info->config_spinlock));
 948
 949                 memcpy(mask, (char *)vm_info->channel_mask, POWER_MGR_MAX_CPUS);
 950                 for (i = 0; i < POWER_MGR_MAX_CPUS; i++) {
 951                         if (mask[i] != 1)
 952                                 continue;
 953                         remove_channel_from_monitor(
 954                                         vm_info->channels[i]);
 955                         close(vm_info->channels[i]->fd);
 956                         rte_free(vm_info->channels[i]);
 957                 }
 958                 rte_spinlock_unlock(&(vm_info->config_spinlock));
 959
 960                 LIST_REMOVE(vm_info, vms_info);
 961                 rte_free(vm_info);
 962         }
 963
 964         if (global_hypervisor_available) {
 965                 /* Only needed if hypervisor available */
 966                 rte_free(global_cpumaps);
 967                 rte_free(global_vircpuinfo);
 968                 disconnect_hypervisor();
 969         }
 970 }