1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
14 #include <sys/queue.h>
15 #include <sys/types.h>
17 #include <sys/socket.h>
18 #include <sys/select.h>
20 #include <rte_string_fns.h>
21 #include <rte_malloc.h>
22 #include <rte_memory.h>
23 #include <rte_mempool.h>
25 #include <rte_atomic.h>
26 #include <rte_spinlock.h>
28 #include <libvirt/libvirt.h>
30 #include "channel_manager.h"
31 #include "channel_commands.h"
32 #include "channel_monitor.h"
33 #include "power_manager.h"
36 #define RTE_LOGTYPE_CHANNEL_MANAGER RTE_LOGTYPE_USER1
38 /* Global pointer to libvirt connection */
39 static virConnectPtr global_vir_conn_ptr;
41 static unsigned char *global_cpumaps;
42 static virVcpuInfo *global_vircpuinfo;
43 static size_t global_maplen;
45 static unsigned int global_n_host_cpus;
46 static bool global_hypervisor_available;
49 * Represents a single Virtual Machine
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];
57 enum vm_status status;
58 virDomainPtr domainPtr;
60 rte_spinlock_t config_spinlock;
61 LIST_ENTRY(virtual_machine_info) vms_info;
64 LIST_HEAD(, virtual_machine_info) vm_list_head;
66 static struct virtual_machine_info *
67 find_domain_by_name(const char *name)
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))
78 update_pcpus_mask(struct virtual_machine_info *vm_info)
80 virVcpuInfoPtr cpuinfo;
84 memset(global_cpumaps, 0, RTE_MAX_LCORE*global_maplen);
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);
91 RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting vCPU info for "
92 "in-active VM '%s'\n", vm_info->name);
98 memset(global_vircpuinfo, 0, sizeof(*global_vircpuinfo)*
101 cpuinfo = global_vircpuinfo;
103 n_vcpus = virDomainGetVcpus(vm_info->domainPtr, cpuinfo,
104 RTE_MAX_LCORE, global_cpumaps, global_maplen);
106 RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting vCPU info for "
107 "active VM '%s'\n", vm_info->name);
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);
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,
120 vm_info->info.nrVirtCpu = n_vcpus;
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)
128 vm_info->pcpu_map[i] = j;
131 rte_spinlock_unlock(&(vm_info->config_spinlock));
136 set_pcpu(char *vm_name, unsigned int vcpu, unsigned int pcpu)
138 int flags = VIR_DOMAIN_AFFECT_LIVE|VIR_DOMAIN_AFFECT_CONFIG;
139 struct virtual_machine_info *vm_info;
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);
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);
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);
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);
165 memset(global_cpumaps, 0, RTE_MAX_LCORE * global_maplen);
167 VIR_USE_CPU(global_cpumaps, pcpu);
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);
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,
183 rte_spinlock_lock(&(vm_info->config_spinlock));
184 vm_info->pcpu_map[vcpu] = pcpu;
185 rte_spinlock_unlock(&(vm_info->config_spinlock));
190 get_pcpu(struct channel_info *chan_info, unsigned int vcpu)
192 struct virtual_machine_info *vm_info =
193 (struct virtual_machine_info *)chan_info->priv_info;
195 if (global_hypervisor_available && (vm_info != NULL)) {
197 rte_spinlock_lock(&(vm_info->config_spinlock));
198 pcpu = vm_info->pcpu_map[vcpu];
199 rte_spinlock_unlock(&(vm_info->config_spinlock));
206 channel_exists(struct virtual_machine_info *vm_info, unsigned channel_num)
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));
213 rte_spinlock_unlock(&(vm_info->config_spinlock));
220 open_non_blocking_channel(struct channel_info *info)
223 struct sockaddr_un sock_addr;
227 info->fd = socket(AF_UNIX, SOCK_STREAM, 0);
229 RTE_LOG(ERR, CHANNEL_MANAGER, "Error(%s) creating socket for '%s'\n",
234 sock_addr.sun_family = AF_UNIX;
235 memcpy(&sock_addr.sun_path, info->channel_path,
236 strlen(info->channel_path)+1);
238 /* Get current flags */
239 flags = fcntl(info->fd, F_GETFL, 0);
241 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) fcntl get flags socket for"
242 "'%s'\n", strerror(errno), info->channel_path);
245 /* Set to Non Blocking */
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);
252 ret = connect(info->fd, (struct sockaddr *)&sock_addr,
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",
262 /* Wait for tv_sec if in progress */
263 else if (errno == EINPROGRESS) {
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);
274 /* Any other error */
275 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) connecting socket"
276 " for '%s'\n", strerror(errno), info->channel_path);
284 open_host_channel(struct channel_info *info)
288 info->fd = open(info->channel_path, O_RDWR | O_RSYNC);
290 RTE_LOG(ERR, CHANNEL_MANAGER, "Error(%s) opening fifo for '%s'\n",
296 /* Get current flags */
297 flags = fcntl(info->fd, F_GETFL, 0);
299 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) fcntl get flags socket for"
300 "'%s'\n", strerror(errno), info->channel_path);
303 /* Set to Non Blocking */
305 if (fcntl(info->fd, F_SETFL, flags) < 0) {
306 RTE_LOG(WARNING, CHANNEL_MANAGER,
307 "Error(%s) setting non-blocking "
309 strerror(errno), info->channel_path);
316 setup_channel_info(struct virtual_machine_info **vm_info_dptr,
317 struct channel_info **chan_info_dptr, unsigned channel_num)
319 struct channel_info *chan_info = *chan_info_dptr;
320 struct virtual_machine_info *vm_info = *vm_info_dptr;
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);
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);
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));
349 fifo_path(char *dst, unsigned int len)
351 snprintf(dst, len, "%sfifo", CHANNEL_MGR_SOCKET_PATH);
355 setup_host_channel_info(struct channel_info **chan_info_dptr,
356 unsigned int channel_num)
358 struct channel_info *chan_info = *chan_info_dptr;
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;
365 if (open_host_channel(chan_info) < 0) {
366 RTE_LOG(ERR, CHANNEL_MANAGER, "Could not open host channel: "
368 chan_info->channel_path);
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);
378 chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
383 add_all_channels(const char *vm_name)
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;
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);
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;
406 d = opendir(CHANNEL_MGR_SOCKET_PATH);
408 RTE_LOG(ERR, CHANNEL_MANAGER, "Error opening directory '%s': %s\n",
409 CHANNEL_MGR_SOCKET_PATH, strerror(errno));
412 while ((dir = readdir(d)) != NULL) {
413 if (!strncmp(dir->d_name, ".", 1) ||
414 !strncmp(dir->d_name, "..", 2))
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)
423 if (strncmp(vm_name, token, CHANNEL_MGR_MAX_NAME_LEN))
426 /* remaining should contain only <channel_num> */
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",
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);
444 /* if channel has not been added previously */
445 if (channel_exists(vm_info, channel_num))
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);
456 snprintf(chan_info->channel_path,
457 sizeof(chan_info->channel_path), "%s%s",
458 CHANNEL_MGR_SOCKET_PATH, dir->d_name);
460 if (setup_channel_info(&vm_info, &chan_info, channel_num) < 0) {
465 num_channels_enabled++;
468 return num_channels_enabled;
472 add_channels(const char *vm_name, unsigned *channel_list,
473 unsigned len_channel_list)
475 struct virtual_machine_info *vm_info;
476 struct channel_info *chan_info;
477 char socket_path[PATH_MAX];
479 int num_channels_enabled = 0;
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);
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;
494 for (i = 0; i < len_channel_list; i++) {
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],
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);
508 snprintf(socket_path, sizeof(socket_path), "%s%s.%u",
509 CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
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));
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);
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) {
530 num_channels_enabled++;
533 return num_channels_enabled;
537 add_host_channel(void)
539 struct channel_info *chan_info;
540 char socket_path[PATH_MAX];
541 int num_channels_enabled = 0;
544 fifo_path(socket_path, sizeof(socket_path));
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));
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));
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);
564 rte_strlcpy(chan_info->channel_path, socket_path, UNIX_PATH_MAX);
566 if (setup_host_channel_info(&chan_info, 0) < 0) {
570 num_channels_enabled++;
572 return num_channels_enabled;
576 remove_channel(struct channel_info **chan_info_dptr)
578 struct virtual_machine_info *vm_info;
579 struct channel_info *chan_info = *chan_info_dptr;
581 close(chan_info->fd);
583 vm_info = (struct virtual_machine_info *)chan_info->priv_info;
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));
595 set_channel_status_all(const char *vm_name, enum channel_status status)
597 struct virtual_machine_info *vm_info;
599 char mask[RTE_MAX_LCORE];
600 int num_channels_changed = 0;
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);
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);
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++) {
619 vm_info->channels[i]->status = status;
620 num_channels_changed++;
622 rte_spinlock_unlock(&(vm_info->config_spinlock));
623 return num_channels_changed;
628 set_channel_status(const char *vm_name, unsigned *channel_list,
629 unsigned len_channel_list, enum channel_status status)
631 struct virtual_machine_info *vm_info;
633 int num_channels_changed = 0;
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);
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);
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++;
654 return num_channels_changed;
658 get_all_vm(int *num_vm, int *num_vcpu)
661 virNodeInfo node_info;
662 virDomainPtr *domptr;
663 int i, ii, numVcpus[MAX_VCPUS], n_vcpus;
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;
670 if (!global_hypervisor_available)
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");
679 /* Returns number of pcpus */
680 global_n_host_cpus = (unsigned int)node_info.cpus;
682 /* Returns number of active domains */
683 *num_vm = virConnectListAllDomains(global_vir_conn_ptr, &domptr,
686 RTE_LOG(ERR, CHANNEL_MANAGER, "No Active Domains Running\n");
690 for (i = 0; i < *num_vm; i++) {
692 /* Get Domain Names */
693 vm_name = virDomainGetName(domptr[i]);
694 lvm_info[i].vm_name = vm_name;
696 /* Get Number of Vcpus */
697 numVcpus[i] = virDomainGetVcpusFlags(domptr[i], domain_flag);
699 /* Get Number of VCpus & VcpuPinInfo */
700 n_vcpus = virDomainGetVcpuPinInfo(domptr[i],
701 numVcpus[i], global_cpumaps,
702 global_maplen, domain_flag);
704 if ((int)n_vcpus > 0) {
706 lvm_info[i].num_cpus = n_vcpus;
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;
722 get_info_vm(const char *vm_name, struct vm_info *info)
724 struct virtual_machine_info *vm_info;
725 unsigned i, channel_num = 0;
726 char mask[RTE_MAX_LCORE];
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);
733 info->status = CHANNEL_MGR_VM_ACTIVE;
734 if (!virDomainIsActive(vm_info->domainPtr))
735 info->status = CHANNEL_MGR_VM_INACTIVE;
737 rte_spinlock_lock(&(vm_info->config_spinlock));
739 memcpy(mask, (char *)vm_info->channel_mask, RTE_MAX_LCORE);
740 for (i = 0; i < RTE_MAX_LCORE; i++) {
743 info->channels[channel_num].channel_num = i;
744 memcpy(info->channels[channel_num].channel_path,
745 vm_info->channels[i]->channel_path,
747 info->channels[channel_num].status =
748 vm_info->channels[i]->status;
749 info->channels[channel_num].fd =
750 vm_info->channels[i]->fd;
754 info->num_channels = channel_num;
755 info->num_vcpus = vm_info->info.nrVirtCpu;
756 rte_spinlock_unlock(&(vm_info->config_spinlock));
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];
763 rte_spinlock_unlock(&(vm_info->config_spinlock));
768 add_vm(const char *vm_name)
770 struct virtual_machine_info *new_domain;
771 virDomainPtr dom_ptr;
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);
780 if (global_vir_conn_ptr == NULL) {
781 RTE_LOG(ERR, CHANNEL_MANAGER, "No connection to hypervisor exists\n");
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);
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 "
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);
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,
808 rte_free(new_domain);
812 for (i = 0; i < RTE_MAX_LCORE; i++)
813 new_domain->pcpu_map[i] = 0;
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);
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;
825 if (!virDomainIsActive(dom_ptr))
826 new_domain->status = CHANNEL_MGR_VM_INACTIVE;
828 new_domain->status = CHANNEL_MGR_VM_ACTIVE;
830 rte_spinlock_init(&(new_domain->config_spinlock));
831 LIST_INSERT_HEAD(&vm_list_head, new_domain, vms_info);
836 remove_vm(const char *vm_name)
838 struct virtual_machine_info *vm_info = find_domain_by_name(vm_name);
840 if (vm_info == NULL) {
841 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM: VM '%s' "
842 "not found\n", vm_name);
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);
853 LIST_REMOVE(vm_info, vms_info);
854 rte_spinlock_unlock(&vm_info->config_spinlock);
860 disconnect_hypervisor(void)
862 if (global_vir_conn_ptr != NULL) {
863 virConnectClose(global_vir_conn_ptr);
864 global_vir_conn_ptr = NULL;
869 connect_hypervisor(const char *path)
871 if (global_vir_conn_ptr != NULL) {
872 RTE_LOG(ERR, CHANNEL_MANAGER, "Error connecting to %s, connection "
873 "already established\n", path);
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);
885 channel_manager_init(const char *path __rte_unused)
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");
895 global_hypervisor_available = 1;
897 global_maplen = VIR_CPU_MAPLEN(RTE_MAX_LCORE);
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");
906 global_cpumaps = rte_zmalloc(NULL,
907 RTE_MAX_LCORE * global_maplen,
908 RTE_CACHE_LINE_SIZE);
909 if (global_cpumaps == NULL)
912 if (virNodeGetInfo(global_vir_conn_ptr, &info)) {
913 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
916 global_n_host_cpus = (unsigned int)info.cpus;
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,
926 global_n_host_cpus = RTE_MAX_LCORE;
931 if (global_hypervisor_available)
932 disconnect_hypervisor();
937 channel_manager_exit(void)
940 char mask[RTE_MAX_LCORE];
941 struct virtual_machine_info *vm_info;
943 LIST_FOREACH(vm_info, &vm_list_head, vms_info) {
945 rte_spinlock_lock(&(vm_info->config_spinlock));
947 memcpy(mask, (char *)vm_info->channel_mask, RTE_MAX_LCORE);
948 for (i = 0; i < RTE_MAX_LCORE; i++) {
951 remove_channel_from_monitor(
952 vm_info->channels[i]);
953 close(vm_info->channels[i]->fd);
954 rte_free(vm_info->channels[i]);
956 rte_spinlock_unlock(&(vm_info->config_spinlock));
958 LIST_REMOVE(vm_info, vms_info);
962 if (global_hypervisor_available) {
963 /* Only needed if hypervisor available */
964 rte_free(global_cpumaps);
965 rte_free(global_vircpuinfo);
966 disconnect_hypervisor();