DPDK  20.11.3
examples/vm_power_manager/channel_manager.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <inttypes.h>
#include <dirent.h>
#include <errno.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <rte_string_fns.h>
#include <rte_malloc.h>
#include <rte_memory.h>
#include <rte_mempool.h>
#include <rte_log.h>
#include <rte_atomic.h>
#include <rte_spinlock.h>
#include <libvirt/libvirt.h>
#include "channel_manager.h"
#include "channel_monitor.h"
#include "power_manager.h"
#define RTE_LOGTYPE_CHANNEL_MANAGER RTE_LOGTYPE_USER1
struct libvirt_vm_info lvm_info[MAX_CLIENTS];
/* Global pointer to libvirt connection */
static virConnectPtr global_vir_conn_ptr;
static unsigned char *global_cpumaps;
static virVcpuInfo *global_vircpuinfo;
static size_t global_maplen;
static unsigned int global_n_host_cpus;
static bool global_hypervisor_available;
/*
* Represents a single Virtual Machine
*/
struct virtual_machine_info {
char name[CHANNEL_MGR_MAX_NAME_LEN];
uint16_t pcpu_map[RTE_MAX_LCORE];
struct channel_info *channels[RTE_MAX_LCORE];
char channel_mask[RTE_MAX_LCORE];
uint8_t num_channels;
enum vm_status status;
virDomainPtr domainPtr;
virDomainInfo info;
rte_spinlock_t config_spinlock;
int allow_query;
LIST_ENTRY(virtual_machine_info) vms_info;
};
LIST_HEAD(, virtual_machine_info) vm_list_head;
static struct virtual_machine_info *
find_domain_by_name(const char *name)
{
struct virtual_machine_info *info;
LIST_FOREACH(info, &vm_list_head, vms_info) {
if (!strncmp(info->name, name, CHANNEL_MGR_MAX_NAME_LEN-1))
return info;
}
return NULL;
}
static int
update_pcpus_mask(struct virtual_machine_info *vm_info)
{
virVcpuInfoPtr cpuinfo;
unsigned i, j;
int n_vcpus;
memset(global_cpumaps, 0, RTE_MAX_LCORE*global_maplen);
if (!virDomainIsActive(vm_info->domainPtr)) {
n_vcpus = virDomainGetVcpuPinInfo(vm_info->domainPtr,
vm_info->info.nrVirtCpu, global_cpumaps, global_maplen,
VIR_DOMAIN_AFFECT_CONFIG);
if (n_vcpus < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting vCPU info for "
"in-active VM '%s'\n", vm_info->name);
return -1;
}
goto update_pcpus;
}
memset(global_vircpuinfo, 0, sizeof(*global_vircpuinfo)*
RTE_MAX_LCORE);
cpuinfo = global_vircpuinfo;
n_vcpus = virDomainGetVcpus(vm_info->domainPtr, cpuinfo,
RTE_MAX_LCORE, global_cpumaps, global_maplen);
if (n_vcpus < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting vCPU info for "
"active VM '%s'\n", vm_info->name);
return -1;
}
update_pcpus:
if (n_vcpus >= RTE_MAX_LCORE) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Number of vCPUS(%u) is out of range "
"0...%d\n", n_vcpus, RTE_MAX_LCORE-1);
return -1;
}
if (n_vcpus != vm_info->info.nrVirtCpu) {
RTE_LOG(INFO, CHANNEL_MANAGER, "Updating the number of vCPUs for VM '%s"
" from %d -> %d\n", vm_info->name, vm_info->info.nrVirtCpu,
n_vcpus);
vm_info->info.nrVirtCpu = n_vcpus;
}
rte_spinlock_lock(&(vm_info->config_spinlock));
for (i = 0; i < vm_info->info.nrVirtCpu; i++) {
for (j = 0; j < global_n_host_cpus; j++) {
if (VIR_CPU_USABLE(global_cpumaps,
global_maplen, i, j) <= 0)
continue;
vm_info->pcpu_map[i] = j;
}
}
rte_spinlock_unlock(&(vm_info->config_spinlock));
return 0;
}
int
set_pcpu(char *vm_name, unsigned int vcpu, unsigned int pcpu)
{
int flags = VIR_DOMAIN_AFFECT_LIVE|VIR_DOMAIN_AFFECT_CONFIG;
struct virtual_machine_info *vm_info;
if (vcpu >= RTE_MAX_LCORE) {
RTE_LOG(ERR, CHANNEL_MANAGER, "vCPU(%u) exceeds max allowable(%d)\n",
vcpu, RTE_MAX_LCORE-1);
return -1;
}
vm_info = find_domain_by_name(vm_name);
if (vm_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "VM '%s' not found\n", vm_name);
return -1;
}
if (!virDomainIsActive(vm_info->domainPtr)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to set vCPU(%u) to pCPU "
" for VM '%s', VM is not active\n",
vcpu, vm_info->name);
return -1;
}
if (vcpu >= vm_info->info.nrVirtCpu) {
RTE_LOG(ERR, CHANNEL_MANAGER, "vCPU(%u) exceeds the assigned number of "
"vCPUs(%u)\n", vcpu, vm_info->info.nrVirtCpu);
return -1;
}
memset(global_cpumaps, 0, RTE_MAX_LCORE * global_maplen);
VIR_USE_CPU(global_cpumaps, pcpu);
if (pcpu >= global_n_host_cpus) {
RTE_LOG(ERR, CHANNEL_MANAGER, "CPU(%u) exceeds the available "
"number of CPUs(%u)\n",
pcpu, global_n_host_cpus);
return -1;
}
if (virDomainPinVcpuFlags(vm_info->domainPtr, vcpu, global_cpumaps,
global_maplen, flags) < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to set vCPU(%u) to pCPU "
" for VM '%s'\n", vcpu,
vm_info->name);
return -1;
}
rte_spinlock_lock(&(vm_info->config_spinlock));
vm_info->pcpu_map[vcpu] = pcpu;
rte_spinlock_unlock(&(vm_info->config_spinlock));
return 0;
}
uint16_t
get_pcpu(struct channel_info *chan_info, unsigned int vcpu)
{
struct virtual_machine_info *vm_info =
(struct virtual_machine_info *)chan_info->priv_info;
if (global_hypervisor_available && (vm_info != NULL)) {
uint16_t pcpu;
rte_spinlock_lock(&(vm_info->config_spinlock));
pcpu = vm_info->pcpu_map[vcpu];
rte_spinlock_unlock(&(vm_info->config_spinlock));
return pcpu;
} else
return 0;
}
static inline int
channel_exists(struct virtual_machine_info *vm_info, unsigned channel_num)
{
rte_spinlock_lock(&(vm_info->config_spinlock));
if (vm_info->channel_mask[channel_num] == 1) {
rte_spinlock_unlock(&(vm_info->config_spinlock));
return 1;
}
rte_spinlock_unlock(&(vm_info->config_spinlock));
return 0;
}
static int
open_non_blocking_channel(struct channel_info *info)
{
int ret, flags;
struct sockaddr_un sock_addr;
fd_set soc_fd_set;
struct timeval tv;
info->fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (info->fd < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error(%s) creating socket for '%s'\n",
strerror(errno),
info->channel_path);
return -1;
}
sock_addr.sun_family = AF_UNIX;
memcpy(&sock_addr.sun_path, info->channel_path,
strlen(info->channel_path)+1);
/* Get current flags */
flags = fcntl(info->fd, F_GETFL, 0);
if (flags < 0) {
RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) fcntl get flags socket for"
"'%s'\n", strerror(errno), info->channel_path);
return 1;
}
/* Set to Non Blocking */
flags |= O_NONBLOCK;
if (fcntl(info->fd, F_SETFL, flags) < 0) {
RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) setting non-blocking "
"socket for '%s'\n", strerror(errno), info->channel_path);
return -1;
}
ret = connect(info->fd, (struct sockaddr *)&sock_addr,
sizeof(sock_addr));
if (ret < 0) {
/* ECONNREFUSED error is given when VM is not active */
if (errno == ECONNREFUSED) {
RTE_LOG(WARNING, CHANNEL_MANAGER, "VM is not active or has not "
"activated its endpoint to channel %s\n",
info->channel_path);
return -1;
}
/* Wait for tv_sec if in progress */
else if (errno == EINPROGRESS) {
tv.tv_sec = 2;
tv.tv_usec = 0;
FD_ZERO(&soc_fd_set);
FD_SET(info->fd, &soc_fd_set);
if (select(info->fd+1, NULL, &soc_fd_set, NULL, &tv) > 0) {
RTE_LOG(WARNING, CHANNEL_MANAGER, "Timeout or error on channel "
"'%s'\n", info->channel_path);
return -1;
}
} else {
/* Any other error */
RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) connecting socket"
" for '%s'\n", strerror(errno), info->channel_path);
return -1;
}
}
return 0;
}
static int
open_host_channel(struct channel_info *info)
{
int flags;
info->fd = open(info->channel_path, O_RDWR | O_RSYNC);
if (info->fd < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error(%s) opening fifo for '%s'\n",
strerror(errno),
info->channel_path);
return -1;
}
/* Get current flags */
flags = fcntl(info->fd, F_GETFL, 0);
if (flags < 0) {
RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) fcntl get flags socket for"
"'%s'\n", strerror(errno), info->channel_path);
return 1;
}
/* Set to Non Blocking */
flags |= O_NONBLOCK;
if (fcntl(info->fd, F_SETFL, flags) < 0) {
RTE_LOG(WARNING, CHANNEL_MANAGER,
"Error(%s) setting non-blocking "
"socket for '%s'\n",
strerror(errno), info->channel_path);
return -1;
}
return 0;
}
static int
setup_channel_info(struct virtual_machine_info **vm_info_dptr,
struct channel_info **chan_info_dptr, unsigned channel_num)
{
struct channel_info *chan_info = *chan_info_dptr;
struct virtual_machine_info *vm_info = *vm_info_dptr;
chan_info->channel_num = channel_num;
chan_info->priv_info = (void *)vm_info;
chan_info->status = CHANNEL_MGR_CHANNEL_DISCONNECTED;
chan_info->type = CHANNEL_TYPE_BINARY;
if (open_non_blocking_channel(chan_info) < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Could not open channel: "
"'%s' for VM '%s'\n",
chan_info->channel_path, vm_info->name);
return -1;
}
if (add_channel_to_monitor(&chan_info) < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Could add channel: "
"'%s' to epoll ctl for VM '%s'\n",
chan_info->channel_path, vm_info->name);
return -1;
}
rte_spinlock_lock(&(vm_info->config_spinlock));
vm_info->num_channels++;
vm_info->channel_mask[channel_num] = 1;
vm_info->channels[channel_num] = chan_info;
chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
rte_spinlock_unlock(&(vm_info->config_spinlock));
return 0;
}
static int
fifo_path(char *dst, unsigned int len, unsigned int id)
{
int cnt;
cnt = snprintf(dst, len, "%s%s%d", CHANNEL_MGR_SOCKET_PATH,
CHANNEL_MGR_FIFO_PATTERN_NAME, id);
if ((cnt < 0) || (cnt > (int)len - 1)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Could not create proper "
"string for fifo path\n");
return -1;
}
return 0;
}
static int
setup_host_channel_info(struct channel_info **chan_info_dptr,
unsigned int channel_num)
{
struct channel_info *chan_info = *chan_info_dptr;
chan_info->channel_num = channel_num;
chan_info->priv_info = (void *)NULL;
chan_info->status = CHANNEL_MGR_CHANNEL_DISCONNECTED;
chan_info->type = CHANNEL_TYPE_JSON;
if (open_host_channel(chan_info) < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Could not open host channel: "
"'%s'\n",
chan_info->channel_path);
return -1;
}
if (add_channel_to_monitor(&chan_info) < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Could add channel: "
"'%s' to epoll ctl\n",
chan_info->channel_path);
return -1;
}
chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
return 0;
}
int
add_all_channels(const char *vm_name)
{
DIR *d;
struct dirent *dir;
struct virtual_machine_info *vm_info;
struct channel_info *chan_info;
char *token, *remaining, *tail_ptr;
char socket_name[PATH_MAX];
unsigned channel_num;
int num_channels_enabled = 0;
/* verify VM exists */
vm_info = find_domain_by_name(vm_name);
if (vm_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' not found"
" during channel discovery\n", vm_name);
return 0;
}
if (!virDomainIsActive(vm_info->domainPtr)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' is not active\n", vm_name);
vm_info->status = CHANNEL_MGR_VM_INACTIVE;
return 0;
}
d = opendir(CHANNEL_MGR_SOCKET_PATH);
if (d == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error opening directory '%s': %s\n",
CHANNEL_MGR_SOCKET_PATH, strerror(errno));
return -1;
}
while ((dir = readdir(d)) != NULL) {
if (!strncmp(dir->d_name, ".", 1) ||
!strncmp(dir->d_name, "..", 2))
continue;
strlcpy(socket_name, dir->d_name, sizeof(socket_name));
remaining = socket_name;
/* Extract vm_name from "<vm_name>.<channel_num>" */
token = strsep(&remaining, ".");
if (remaining == NULL)
continue;
if (strncmp(vm_name, token, CHANNEL_MGR_MAX_NAME_LEN))
continue;
/* remaining should contain only <channel_num> */
errno = 0;
channel_num = (unsigned)strtol(remaining, &tail_ptr, 0);
if ((errno != 0) || (remaining[0] == '\0') ||
tail_ptr == NULL || (*tail_ptr != '\0')) {
RTE_LOG(WARNING, CHANNEL_MANAGER, "Malformed channel name"
"'%s' found it should be in the form of "
"'<guest_name>.<channel_num>(decimal)'\n",
dir->d_name);
continue;
}
if (channel_num >= RTE_MAX_LCORE) {
RTE_LOG(WARNING, CHANNEL_MANAGER, "Channel number(%u) is "
"greater than max allowable: %d, skipping '%s%s'\n",
channel_num, RTE_MAX_LCORE-1,
CHANNEL_MGR_SOCKET_PATH, dir->d_name);
continue;
}
/* if channel has not been added previously */
if (channel_exists(vm_info, channel_num))
continue;
chan_info = rte_malloc(NULL, sizeof(*chan_info),
RTE_CACHE_LINE_SIZE);
if (chan_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
"channel '%s%s'\n", CHANNEL_MGR_SOCKET_PATH, dir->d_name);
continue;
}
if ((size_t)snprintf(chan_info->channel_path,
sizeof(chan_info->channel_path), "%s%s",
CHANNEL_MGR_SOCKET_PATH, dir->d_name)
>= sizeof(chan_info->channel_path)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Pathname too long for channel '%s%s'\n",
CHANNEL_MGR_SOCKET_PATH, dir->d_name);
rte_free(chan_info);
continue;
}
if (setup_channel_info(&vm_info, &chan_info, channel_num) < 0) {
rte_free(chan_info);
continue;
}
num_channels_enabled++;
}
closedir(d);
return num_channels_enabled;
}
int
add_channels(const char *vm_name, unsigned *channel_list,
unsigned len_channel_list)
{
struct virtual_machine_info *vm_info;
struct channel_info *chan_info;
char socket_path[PATH_MAX];
unsigned i;
int num_channels_enabled = 0;
vm_info = find_domain_by_name(vm_name);
if (vm_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add channels: VM '%s' "
"not found\n", vm_name);
return 0;
}
if (!virDomainIsActive(vm_info->domainPtr)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' is not active\n", vm_name);
vm_info->status = CHANNEL_MGR_VM_INACTIVE;
return 0;
}
for (i = 0; i < len_channel_list; i++) {
if (channel_list[i] >= RTE_MAX_LCORE) {
RTE_LOG(INFO, CHANNEL_MANAGER, "Channel(%u) is out of range "
"0...%d\n", channel_list[i],
RTE_MAX_LCORE-1);
continue;
}
if (channel_exists(vm_info, channel_list[i])) {
RTE_LOG(INFO, CHANNEL_MANAGER, "Channel already exists, skipping "
"'%s.%u'\n", vm_name, i);
continue;
}
snprintf(socket_path, sizeof(socket_path), "%s%s.%u",
CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
errno = 0;
if (access(socket_path, F_OK) < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Channel path '%s' error: "
"%s\n", socket_path, strerror(errno));
continue;
}
chan_info = rte_malloc(NULL, sizeof(*chan_info),
RTE_CACHE_LINE_SIZE);
if (chan_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
"channel '%s'\n", socket_path);
continue;
}
snprintf(chan_info->channel_path,
sizeof(chan_info->channel_path), "%s%s.%u",
CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
if (setup_channel_info(&vm_info, &chan_info, channel_list[i]) < 0) {
rte_free(chan_info);
continue;
}
num_channels_enabled++;
}
return num_channels_enabled;
}
int
add_host_channels(void)
{
struct channel_info *chan_info;
char socket_path[PATH_MAX];
int num_channels_enabled = 0;
int ret;
struct core_info *ci;
struct channel_info *chan_infos[RTE_MAX_LCORE];
int i;
for (i = 0; i < RTE_MAX_LCORE; i++)
chan_infos[i] = NULL;
ci = get_core_info();
if (ci == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Cannot allocate memory for core_info\n");
return 0;
}
for (i = 0; i < ci->core_count; i++) {
if (ci->cd[i].global_enabled_cpus == 0)
continue;
ret = fifo_path(socket_path, sizeof(socket_path), i);
if (ret < 0)
goto error;
ret = mkfifo(socket_path, 0660);
RTE_LOG(DEBUG, CHANNEL_MANAGER, "TRY CREATE fifo '%s'\n",
socket_path);
if ((errno != EEXIST) && (ret < 0)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Cannot create fifo '%s' error: "
"%s\n", socket_path, strerror(errno));
goto error;
}
chan_info = rte_malloc(NULL, sizeof(*chan_info), 0);
if (chan_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
"channel '%s'\n", socket_path);
goto error;
}
chan_infos[i] = chan_info;
strlcpy(chan_info->channel_path, socket_path,
sizeof(chan_info->channel_path));
if (setup_host_channel_info(&chan_info, i) < 0) {
rte_free(chan_info);
chan_infos[i] = NULL;
goto error;
}
num_channels_enabled++;
}
return num_channels_enabled;
error:
/* Clean up the channels opened before we hit an error. */
for (i = 0; i < ci->core_count; i++) {
if (chan_infos[i] != NULL) {
remove_channel_from_monitor(chan_infos[i]);
close(chan_infos[i]->fd);
rte_free(chan_infos[i]);
}
}
return 0;
}
int
remove_channel(struct channel_info **chan_info_dptr)
{
struct virtual_machine_info *vm_info;
struct channel_info *chan_info = *chan_info_dptr;
close(chan_info->fd);
vm_info = (struct virtual_machine_info *)chan_info->priv_info;
rte_spinlock_lock(&(vm_info->config_spinlock));
vm_info->channel_mask[chan_info->channel_num] = 0;
vm_info->num_channels--;
rte_spinlock_unlock(&(vm_info->config_spinlock));
rte_free(chan_info);
return 0;
}
int
set_channel_status_all(const char *vm_name, enum channel_status status)
{
struct virtual_machine_info *vm_info;
unsigned i;
char mask[RTE_MAX_LCORE];
int num_channels_changed = 0;
if (!(status == CHANNEL_MGR_CHANNEL_CONNECTED ||
status == CHANNEL_MGR_CHANNEL_DISABLED)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Channels can only be enabled or "
"disabled: Unable to change status for VM '%s'\n", vm_name);
}
vm_info = find_domain_by_name(vm_name);
if (vm_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to disable channels: VM '%s' "
"not found\n", vm_name);
return 0;
}
rte_spinlock_lock(&(vm_info->config_spinlock));
memcpy(mask, (char *)vm_info->channel_mask, RTE_MAX_LCORE);
for (i = 0; i < RTE_MAX_LCORE; i++) {
if (mask[i] != 1)
continue;
vm_info->channels[i]->status = status;
num_channels_changed++;
}
rte_spinlock_unlock(&(vm_info->config_spinlock));
return num_channels_changed;
}
int
set_channel_status(const char *vm_name, unsigned *channel_list,
unsigned len_channel_list, enum channel_status status)
{
struct virtual_machine_info *vm_info;
unsigned i;
int num_channels_changed = 0;
if (!(status == CHANNEL_MGR_CHANNEL_CONNECTED ||
status == CHANNEL_MGR_CHANNEL_DISABLED)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Channels can only be enabled or "
"disabled: Unable to change status for VM '%s'\n", vm_name);
}
vm_info = find_domain_by_name(vm_name);
if (vm_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add channels: VM '%s' "
"not found\n", vm_name);
return 0;
}
for (i = 0; i < len_channel_list; i++) {
if (channel_exists(vm_info, channel_list[i])) {
rte_spinlock_lock(&(vm_info->config_spinlock));
vm_info->channels[channel_list[i]]->status = status;
rte_spinlock_unlock(&(vm_info->config_spinlock));
num_channels_changed++;
}
}
return num_channels_changed;
}
void
get_all_vm(int *num_vm, int *num_vcpu)
{
virNodeInfo node_info;
virDomainPtr *domptr;
int i, ii, numVcpus[MAX_VCPUS], n_vcpus;
unsigned int jj;
const char *vm_name;
unsigned int domain_flags = VIR_CONNECT_LIST_DOMAINS_RUNNING |
VIR_CONNECT_LIST_DOMAINS_PERSISTENT;
unsigned int domain_flag = VIR_DOMAIN_VCPU_CONFIG;
if (!global_hypervisor_available)
return;
memset(global_cpumaps, 0, RTE_MAX_LCORE*global_maplen);
if (virNodeGetInfo(global_vir_conn_ptr, &node_info)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
return;
}
/* Returns number of pcpus */
global_n_host_cpus = (unsigned int)node_info.cpus;
/* Returns number of active domains */
*num_vm = virConnectListAllDomains(global_vir_conn_ptr, &domptr,
domain_flags);
if (*num_vm <= 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "No Active Domains Running\n");
return;
}
for (i = 0; i < *num_vm; i++) {
/* Get Domain Names */
vm_name = virDomainGetName(domptr[i]);
lvm_info[i].vm_name = vm_name;
/* Get Number of Vcpus */
numVcpus[i] = virDomainGetVcpusFlags(domptr[i], domain_flag);
/* Get Number of VCpus & VcpuPinInfo */
n_vcpus = virDomainGetVcpuPinInfo(domptr[i],
numVcpus[i], global_cpumaps,
global_maplen, domain_flag);
if ((int)n_vcpus > 0) {
*num_vcpu = n_vcpus;
lvm_info[i].num_cpus = n_vcpus;
}
/* Save pcpu in use by libvirt VMs */
for (ii = 0; ii < n_vcpus; ii++) {
for (jj = 0; jj < global_n_host_cpus; jj++) {
if (VIR_CPU_USABLE(global_cpumaps,
global_maplen, ii, jj) > 0) {
lvm_info[i].pcpus[ii] = jj;
}
}
}
}
}
int
get_info_vm(const char *vm_name, struct vm_info *info)
{
struct virtual_machine_info *vm_info;
unsigned i, channel_num = 0;
char mask[RTE_MAX_LCORE];
vm_info = find_domain_by_name(vm_name);
if (vm_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "VM '%s' not found\n", vm_name);
return -1;
}
info->status = CHANNEL_MGR_VM_ACTIVE;
if (!virDomainIsActive(vm_info->domainPtr))
info->status = CHANNEL_MGR_VM_INACTIVE;
rte_spinlock_lock(&(vm_info->config_spinlock));
memcpy(mask, (char *)vm_info->channel_mask, RTE_MAX_LCORE);
for (i = 0; i < RTE_MAX_LCORE; i++) {
if (mask[i] != 1)
continue;
info->channels[channel_num].channel_num = i;
memcpy(info->channels[channel_num].channel_path,
vm_info->channels[i]->channel_path,
UNIX_PATH_MAX);
info->channels[channel_num].status =
vm_info->channels[i]->status;
info->channels[channel_num].fd =
vm_info->channels[i]->fd;
channel_num++;
}
info->allow_query = vm_info->allow_query;
info->num_channels = channel_num;
info->num_vcpus = vm_info->info.nrVirtCpu;
rte_spinlock_unlock(&(vm_info->config_spinlock));
memcpy(info->name, vm_info->name, sizeof(vm_info->name));
rte_spinlock_lock(&(vm_info->config_spinlock));
for (i = 0; i < info->num_vcpus; i++) {
info->pcpu_map[i] = vm_info->pcpu_map[i];
}
rte_spinlock_unlock(&(vm_info->config_spinlock));
return 0;
}
int
add_vm(const char *vm_name)
{
struct virtual_machine_info *new_domain;
virDomainPtr dom_ptr;
int i;
if (find_domain_by_name(vm_name) != NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add VM: VM '%s' "
"already exists\n", vm_name);
return -1;
}
if (global_vir_conn_ptr == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "No connection to hypervisor exists\n");
return -1;
}
dom_ptr = virDomainLookupByName(global_vir_conn_ptr, vm_name);
if (dom_ptr == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error on VM lookup with libvirt: "
"VM '%s' not found\n", vm_name);
return -1;
}
new_domain = rte_malloc("virtual_machine_info", sizeof(*new_domain),
RTE_CACHE_LINE_SIZE);
if (new_domain == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to allocate memory for VM "
"info\n");
return -1;
}
new_domain->domainPtr = dom_ptr;
if (virDomainGetInfo(new_domain->domainPtr, &new_domain->info) != 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to get libvirt VM info\n");
rte_free(new_domain);
return -1;
}
if (new_domain->info.nrVirtCpu > RTE_MAX_LCORE) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error the number of virtual CPUs(%u) is "
"greater than allowable(%d)\n", new_domain->info.nrVirtCpu,
RTE_MAX_LCORE);
rte_free(new_domain);
return -1;
}
for (i = 0; i < RTE_MAX_LCORE; i++)
new_domain->pcpu_map[i] = 0;
if (update_pcpus_mask(new_domain) < 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting physical CPU pinning\n");
rte_free(new_domain);
return -1;
}
strncpy(new_domain->name, vm_name, sizeof(new_domain->name));
new_domain->name[sizeof(new_domain->name) - 1] = '\0';
memset(new_domain->channel_mask, 0, RTE_MAX_LCORE);
new_domain->num_channels = 0;
if (!virDomainIsActive(dom_ptr))
new_domain->status = CHANNEL_MGR_VM_INACTIVE;
else
new_domain->status = CHANNEL_MGR_VM_ACTIVE;
new_domain->allow_query = 0;
rte_spinlock_init(&(new_domain->config_spinlock));
LIST_INSERT_HEAD(&vm_list_head, new_domain, vms_info);
return 0;
}
int
remove_vm(const char *vm_name)
{
struct virtual_machine_info *vm_info = find_domain_by_name(vm_name);
if (vm_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM: VM '%s' "
"not found\n", vm_name);
return -1;
}
rte_spinlock_lock(&vm_info->config_spinlock);
if (vm_info->num_channels != 0) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM '%s', there are "
"%"PRId8" channels still active\n",
vm_name, vm_info->num_channels);
rte_spinlock_unlock(&vm_info->config_spinlock);
return -1;
}
LIST_REMOVE(vm_info, vms_info);
rte_spinlock_unlock(&vm_info->config_spinlock);
rte_free(vm_info);
return 0;
}
int
set_query_status(char *vm_name,
bool allow_query)
{
struct virtual_machine_info *vm_info;
vm_info = find_domain_by_name(vm_name);
if (vm_info == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "VM '%s' not found\n", vm_name);
return -1;
}
rte_spinlock_lock(&(vm_info->config_spinlock));
vm_info->allow_query = allow_query ? 1 : 0;
rte_spinlock_unlock(&(vm_info->config_spinlock));
return 0;
}
static void
disconnect_hypervisor(void)
{
if (global_vir_conn_ptr != NULL) {
virConnectClose(global_vir_conn_ptr);
global_vir_conn_ptr = NULL;
}
}
static int
connect_hypervisor(const char *path)
{
if (global_vir_conn_ptr != NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error connecting to %s, connection "
"already established\n", path);
return -1;
}
global_vir_conn_ptr = virConnectOpen(path);
if (global_vir_conn_ptr == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error failed to open connection to "
"Hypervisor '%s'\n", path);
return -1;
}
return 0;
}
int
channel_manager_init(const char *path __rte_unused)
{
virNodeInfo info;
LIST_INIT(&vm_list_head);
if (connect_hypervisor(path) < 0) {
global_n_host_cpus = 64;
global_hypervisor_available = 0;
RTE_LOG(INFO, CHANNEL_MANAGER, "Unable to initialize channel manager\n");
} else {
global_hypervisor_available = 1;
global_maplen = VIR_CPU_MAPLEN(RTE_MAX_LCORE);
global_vircpuinfo = rte_zmalloc(NULL,
sizeof(*global_vircpuinfo) *
RTE_MAX_LCORE, RTE_CACHE_LINE_SIZE);
if (global_vircpuinfo == NULL) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for CPU Info\n");
goto error;
}
global_cpumaps = rte_zmalloc(NULL,
RTE_MAX_LCORE * global_maplen,
RTE_CACHE_LINE_SIZE);
if (global_cpumaps == NULL)
goto error;
if (virNodeGetInfo(global_vir_conn_ptr, &info)) {
RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
goto error;
}
global_n_host_cpus = (unsigned int)info.cpus;
}
if (global_n_host_cpus > RTE_MAX_LCORE) {
RTE_LOG(WARNING, CHANNEL_MANAGER, "The number of host CPUs(%u) exceeds the "
"maximum of %u. No cores over %u should be used.\n",
global_n_host_cpus, RTE_MAX_LCORE,
RTE_MAX_LCORE - 1);
global_n_host_cpus = RTE_MAX_LCORE;
}
return 0;
error:
if (global_hypervisor_available)
disconnect_hypervisor();
return -1;
}
void
channel_manager_exit(void)
{
unsigned i;
char mask[RTE_MAX_LCORE];
struct virtual_machine_info *vm_info;
LIST_FOREACH(vm_info, &vm_list_head, vms_info) {
rte_spinlock_lock(&(vm_info->config_spinlock));
memcpy(mask, (char *)vm_info->channel_mask, RTE_MAX_LCORE);
for (i = 0; i < RTE_MAX_LCORE; i++) {
if (mask[i] != 1)
continue;
remove_channel_from_monitor(
vm_info->channels[i]);
close(vm_info->channels[i]->fd);
rte_free(vm_info->channels[i]);
}
rte_spinlock_unlock(&(vm_info->config_spinlock));
LIST_REMOVE(vm_info, vms_info);
rte_free(vm_info);
}
if (global_hypervisor_available) {
/* Only needed if hypervisor available */
rte_free(global_cpumaps);
rte_free(global_vircpuinfo);
disconnect_hypervisor();
}
}