summaryrefslogtreecommitdiff
path: root/examples/vm_power_manager/channel_manager.c
diff options
context:
space:
mode:
Diffstat (limited to 'examples/vm_power_manager/channel_manager.c')
-rw-r--r--examples/vm_power_manager/channel_manager.c808
1 files changed, 808 insertions, 0 deletions
diff --git a/examples/vm_power_manager/channel_manager.c b/examples/vm_power_manager/channel_manager.c
new file mode 100644
index 0000000..9968ed9
--- /dev/null
+++ b/examples/vm_power_manager/channel_manager.c
@@ -0,0 +1,808 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/un.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/socket.h>
+#include <sys/select.h>
+
+#include <rte_config.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_commands.h"
+#include "channel_monitor.h"
+
+
+#define RTE_LOGTYPE_CHANNEL_MANAGER RTE_LOGTYPE_USER1
+
+#define ITERATIVE_BITMASK_CHECK_64(mask_u64b, i) \
+ for (i = 0; mask_u64b; mask_u64b &= ~(1ULL << i++)) \
+ if ((mask_u64b >> i) & 1) \
+
+/* 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 global_n_host_cpus;
+
+/*
+ * Represents a single Virtual Machine
+ */
+struct virtual_machine_info {
+ char name[CHANNEL_MGR_MAX_NAME_LEN];
+ rte_atomic64_t pcpu_mask[CHANNEL_CMDS_MAX_CPUS];
+ struct channel_info *channels[CHANNEL_CMDS_MAX_VM_CHANNELS];
+ uint64_t channel_mask;
+ uint8_t num_channels;
+ enum vm_status status;
+ virDomainPtr domainPtr;
+ virDomainInfo info;
+ rte_spinlock_t config_spinlock;
+ 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;
+ uint64_t mask;
+
+ memset(global_cpumaps, 0, CHANNEL_CMDS_MAX_CPUS*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)*
+ CHANNEL_CMDS_MAX_CPUS);
+
+ cpuinfo = global_vircpuinfo;
+
+ n_vcpus = virDomainGetVcpus(vm_info->domainPtr, cpuinfo,
+ CHANNEL_CMDS_MAX_CPUS, 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 >= CHANNEL_CMDS_MAX_CPUS) {
+ RTE_LOG(ERR, CHANNEL_MANAGER, "Number of vCPUS(%u) is out of range "
+ "0...%d\n", n_vcpus, CHANNEL_CMDS_MAX_CPUS-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;
+ }
+ for (i = 0; i < vm_info->info.nrVirtCpu; i++) {
+ mask = 0;
+ for (j = 0; j < global_n_host_cpus; j++) {
+ if (VIR_CPU_USABLE(global_cpumaps, global_maplen, i, j) > 0) {
+ mask |= 1ULL << j;
+ }
+ }
+ rte_atomic64_set(&vm_info->pcpu_mask[i], mask);
+ }
+ return 0;
+}
+
+int
+set_pcpus_mask(char *vm_name, unsigned vcpu, uint64_t core_mask)
+{
+ unsigned i = 0;
+ int flags = VIR_DOMAIN_AFFECT_LIVE|VIR_DOMAIN_AFFECT_CONFIG;
+ struct virtual_machine_info *vm_info;
+ uint64_t mask = core_mask;
+
+ if (vcpu >= CHANNEL_CMDS_MAX_CPUS) {
+ RTE_LOG(ERR, CHANNEL_MANAGER, "vCPU(%u) exceeds max allowable(%d)\n",
+ vcpu, CHANNEL_CMDS_MAX_CPUS-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 "
+ "mask(0x%"PRIx64") for VM '%s', VM is not active\n",
+ vcpu, core_mask, 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 , CHANNEL_CMDS_MAX_CPUS * global_maplen);
+ ITERATIVE_BITMASK_CHECK_64(mask, i) {
+ VIR_USE_CPU(global_cpumaps, i);
+ if (i >= global_n_host_cpus) {
+ RTE_LOG(ERR, CHANNEL_MANAGER, "CPU(%u) exceeds the available "
+ "number of CPUs(%u)\n", i, 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 "
+ "mask(0x%"PRIx64") for VM '%s'\n", vcpu, core_mask,
+ vm_info->name);
+ return -1;
+ }
+ rte_atomic64_set(&vm_info->pcpu_mask[vcpu], core_mask);
+ return 0;
+
+}
+
+int
+set_pcpu(char *vm_name, unsigned vcpu, unsigned core_num)
+{
+ uint64_t mask = 1ULL << core_num;
+
+ return set_pcpus_mask(vm_name, vcpu, mask);
+}
+
+uint64_t
+get_pcpus_mask(struct channel_info *chan_info, unsigned vcpu)
+{
+ struct virtual_machine_info *vm_info =
+ (struct virtual_machine_info *)chan_info->priv_info;
+ return rte_atomic64_read(&vm_info->pcpu_mask[vcpu]);
+}
+
+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 & (1ULL << channel_num)) {
+ 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 == -1) {
+ 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
+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;
+ 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 |= 1ULL << channel_num;
+ vm_info->channels[channel_num] = chan_info;
+ chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
+ rte_spinlock_unlock(&(vm_info->config_spinlock));
+ 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;
+
+ snprintf(socket_name, sizeof(socket_name), "%s", dir->d_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 != '\0') || tail_ptr == NULL) {
+ 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 >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
+ RTE_LOG(WARNING, CHANNEL_MANAGER, "Channel number(%u) is "
+ "greater than max allowable: %d, skipping '%s%s'\n",
+ channel_num, CHANNEL_CMDS_MAX_VM_CHANNELS-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),
+ 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;
+ }
+
+ snprintf(chan_info->channel_path,
+ sizeof(chan_info->channel_path), "%s%s",
+ CHANNEL_MGR_SOCKET_PATH, dir->d_name);
+
+ 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] >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
+ RTE_LOG(INFO, CHANNEL_MANAGER, "Channel(%u) is out of range "
+ "0...%d\n", channel_list[i],
+ CHANNEL_CMDS_MAX_VM_CHANNELS-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),
+ 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
+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 &= ~(1ULL << chan_info->channel_num);
+ 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;
+ uint64_t mask;
+ 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));
+ mask = vm_info->channel_mask;
+ ITERATIVE_BITMASK_CHECK_64(mask, i) {
+ 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;
+}
+
+int
+get_info_vm(const char *vm_name, struct vm_info *info)
+{
+ struct virtual_machine_info *vm_info;
+ unsigned i, channel_num = 0;
+ uint64_t mask;
+
+ 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));
+
+ mask = vm_info->channel_mask;
+ ITERATIVE_BITMASK_CHECK_64(mask, i) {
+ info->channels[channel_num].channel_num = i;
+ memcpy(info->channels[channel_num].channel_path,
+ vm_info->channels[i]->channel_path, 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->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));
+ for (i = 0; i < info->num_vcpus; i++) {
+ info->pcpu_mask[i] = rte_atomic64_read(&vm_info->pcpu_mask[i]);
+ }
+ 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),
+ 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 > CHANNEL_CMDS_MAX_CPUS) {
+ RTE_LOG(ERR, CHANNEL_MANAGER, "Error the number of virtual CPUs(%u) is "
+ "greater than allowable(%d)\n", new_domain->info.nrVirtCpu,
+ CHANNEL_CMDS_MAX_CPUS);
+ rte_free(new_domain);
+ return -1;
+ }
+
+ for (i = 0; i < CHANNEL_CMDS_MAX_CPUS; i++) {
+ rte_atomic64_init(&new_domain->pcpu_mask[i]);
+ }
+ 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->channel_mask = 0;
+ new_domain->num_channels = 0;
+
+ if (!virDomainIsActive(dom_ptr))
+ new_domain->status = CHANNEL_MGR_VM_INACTIVE;
+ else
+ new_domain->status = CHANNEL_MGR_VM_ACTIVE;
+
+ 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;
+}
+
+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)
+{
+ int n_cpus;
+
+ LIST_INIT(&vm_list_head);
+ if (connect_hypervisor(path) < 0) {
+ RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to initialize channel manager\n");
+ return -1;
+ }
+
+ global_maplen = VIR_CPU_MAPLEN(CHANNEL_CMDS_MAX_CPUS);
+
+ global_vircpuinfo = rte_zmalloc(NULL, sizeof(*global_vircpuinfo) *
+ CHANNEL_CMDS_MAX_CPUS, 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, CHANNEL_CMDS_MAX_CPUS * global_maplen,
+ CACHE_LINE_SIZE);
+ if (global_cpumaps == NULL) {
+ goto error;
+ }
+
+ n_cpus = virNodeGetCPUMap(global_vir_conn_ptr, NULL, NULL, 0);
+ if (n_cpus <= 0) {
+ RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to get the number of Host "
+ "CPUs\n");
+ goto error;
+ }
+ global_n_host_cpus = (unsigned)n_cpus;
+
+ if (global_n_host_cpus > CHANNEL_CMDS_MAX_CPUS) {
+ RTE_LOG(ERR, CHANNEL_MANAGER, "The number of host CPUs(%u) exceeds the "
+ "maximum of %u\n", global_n_host_cpus, CHANNEL_CMDS_MAX_CPUS);
+ goto error;
+
+ }
+
+ return 0;
+error:
+ disconnect_hypervisor();
+ return -1;
+}
+
+void
+channel_manager_exit(void)
+{
+ unsigned i;
+ uint64_t mask;
+ struct virtual_machine_info *vm_info;
+
+ LIST_FOREACH(vm_info, &vm_list_head, vms_info) {
+
+ rte_spinlock_lock(&(vm_info->config_spinlock));
+
+ mask = vm_info->channel_mask;
+ ITERATIVE_BITMASK_CHECK_64(mask, i) {
+ 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_cpumaps != NULL)
+ rte_free(global_cpumaps);
+ if (global_vircpuinfo != NULL)
+ rte_free(global_vircpuinfo);
+ disconnect_hypervisor();
+}