cgroup.c 23.2 KB
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/*
 * cgroup.c: Tools for managing cgroups
 *
 * Copyright IBM Corp. 2008
 *
 * See COPYING.LIB for the License of this software
 *
 * Authors:
 *  Dan Smith <danms@us.ibm.com>
 */
#include <config.h>

#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
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#ifdef HAVE_MNTENT_H
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# include <mntent.h>
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#endif
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#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <libgen.h>

#include "internal.h"
#include "util.h"
#include "memory.h"
#include "cgroup.h"
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#include "logging.h"
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#define CGROUP_MAX_VAL 512

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VIR_ENUM_IMPL(virCgroupController, VIR_CGROUP_CONTROLLER_LAST,
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              "cpu", "cpuacct", "cpuset", "memory", "devices",
              "freezer");
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struct virCgroupController {
    int type;
    char *mountPoint;
    char *placement;
};
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struct virCgroup {
    char *path;
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    struct virCgroupController controllers[VIR_CGROUP_CONTROLLER_LAST];
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};

/**
 * virCgroupFree:
 *
 * @group: The group structure to free
 */
void virCgroupFree(virCgroupPtr *group)
{
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    int i;

    if (*group == NULL)
        return;

    for (i = 0 ; i < VIR_CGROUP_CONTROLLER_LAST ; i++) {
        VIR_FREE((*group)->controllers[i].mountPoint);
        VIR_FREE((*group)->controllers[i].placement);
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    }
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    VIR_FREE((*group)->path);
    VIR_FREE(*group);
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}

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#ifdef HAVE_MNTENT_H
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/*
 * Process /proc/mounts figuring out what controllers are
 * mounted and where
 */
static int virCgroupDetectMounts(virCgroupPtr group)
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{
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    int i;
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    FILE *mounts = NULL;
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    struct mntent entry;
    char buf[CGROUP_MAX_VAL];

    mounts = fopen("/proc/mounts", "r");
    if (mounts == NULL) {
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        VIR_ERROR0("Unable to open /proc/mounts");
        return -ENOENT;
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    }

    while (getmntent_r(mounts, &entry, buf, sizeof(buf)) != NULL) {
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        if (STRNEQ(entry.mnt_type, "cgroup"))
            continue;
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        for (i = 0 ; i < VIR_CGROUP_CONTROLLER_LAST ; i++) {
            const char *typestr = virCgroupControllerTypeToString(i);
            int typelen = strlen(typestr);
            char *tmp = entry.mnt_opts;
            while (tmp) {
                char *next = strchr(tmp, ',');
                int len;
                if (next) {
                    len = next-tmp;
                    next++;
                } else {
                    len = strlen(tmp);
                }
                if (typelen == len && STREQLEN(typestr, tmp, len) &&
                    !(group->controllers[i].mountPoint = strdup(entry.mnt_dir)))
                    goto no_memory;
                tmp = next;
            }
        }
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    }

    fclose(mounts);

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    return 0;
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no_memory:
    if (mounts)
        fclose(mounts);
    return -ENOMEM;
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}

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/*
 * Process /proc/self/cgroup figuring out what cgroup
 * sub-path the current process is assigned to. ie not
 * neccessarily in the root
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 */
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static int virCgroupDetectPlacement(virCgroupPtr group)
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{
    int i;
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    FILE *mapping  = NULL;
    char line[1024];
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    mapping = fopen("/proc/self/cgroup", "r");
    if (mapping == NULL) {
        VIR_ERROR0("Unable to open /proc/self/cgroup");
        return -ENOENT;
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    }

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    while (fgets(line, sizeof(line), mapping) != NULL) {
        char *controllers = strchr(line, ':');
        char *path = controllers ? strchr(controllers+1, ':') : NULL;
        char *nl = path ? strchr(path, '\n') : NULL;

        if (!controllers || !path)
            continue;

        if (nl)
            *nl = '\0';

        *path = '\0';
        controllers++;
        path++;

        for (i = 0 ; i < VIR_CGROUP_CONTROLLER_LAST ; i++) {
            const char *typestr = virCgroupControllerTypeToString(i);
            int typelen = strlen(typestr);
            char *tmp = controllers;
            while (tmp) {
                char *next = strchr(tmp, ',');
                int len;
                if (next) {
                    len = next-tmp;
                    next++;
                } else {
                    len = strlen(tmp);
                }
                if (typelen == len && STREQLEN(typestr, tmp, len) &&
                    !(group->controllers[i].placement = strdup(STREQ(path, "/") ? "" : path)))
                    goto no_memory;

                tmp = next;
            }
        }
    }

    fclose(mapping);

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    return 0;
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no_memory:
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    fclose(mapping);
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    return -ENOMEM;

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}

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static int virCgroupDetect(virCgroupPtr group)
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{
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    int any = 0;
    int rc;
    int i;
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    rc = virCgroupDetectMounts(group);
    if (rc < 0) {
        VIR_ERROR("Failed to detect mounts for %s", group->path);
        return rc;
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    }

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    /* Check that at least 1 controller is available */
    for (i = 0 ; i < VIR_CGROUP_CONTROLLER_LAST ; i++) {
        if (group->controllers[i].mountPoint != NULL)
            any = 1;
    }
    if (!any)
        return -ENXIO;
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    rc = virCgroupDetectPlacement(group);
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    if (rc == 0) {
        /* Check that for every mounted controller, we found our placement */
        for (i = 0 ; i < VIR_CGROUP_CONTROLLER_LAST ; i++) {
            if (!group->controllers[i].mountPoint)
                continue;
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            if (!group->controllers[i].placement) {
                VIR_ERROR("Could not find placement for controller %s at %s",
                          virCgroupControllerTypeToString(i),
                          group->controllers[i].placement);
                rc = -ENOENT;
                break;
            }
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            VIR_DEBUG("Detected mount/mapping %i:%s at %s in %s", i,
                      virCgroupControllerTypeToString(i),
                      group->controllers[i].mountPoint,
                      group->controllers[i].placement);
        }
    } else {
        VIR_ERROR("Failed to detect mapping for %s", group->path);
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    }

    return rc;
}
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#endif
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static int virCgroupPathOfController(virCgroupPtr group,
                                     int controller,
                                     const char *key,
                                     char **path)
{
    if (group->controllers[controller].mountPoint == NULL)
        return -ENOENT;

    if (group->controllers[controller].placement == NULL)
        return -ENOENT;

    if (virAsprintf(path, "%s%s%s/%s",
                    group->controllers[controller].mountPoint,
                    group->controllers[controller].placement,
                    STREQ(group->path, "/") ? "" : group->path,
                    key ? key : "") == -1)
        return -ENOMEM;

    return 0;
}


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static int virCgroupSetValueStr(virCgroupPtr group,
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                                int controller,
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                                const char *key,
                                const char *value)
{
    int rc = 0;
    char *keypath = NULL;

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    rc = virCgroupPathOfController(group, controller, key, &keypath);
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    if (rc != 0)
        return rc;

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    VIR_DEBUG("Set value %s", keypath);
    rc = virFileWriteStr(keypath, value);
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    if (rc < 0) {
        DEBUG("Failed to write value '%s': %m", value);
        rc = -errno;
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    } else {
        rc = 0;
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    }

    VIR_FREE(keypath);

    return rc;
}

static int virCgroupGetValueStr(virCgroupPtr group,
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                                int controller,
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                                const char *key,
                                char **value)
{
    int rc;
    char *keypath = NULL;

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    *value = NULL;
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    rc = virCgroupPathOfController(group, controller, key, &keypath);
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    if (rc != 0) {
        DEBUG("No path of %s, %s", group->path, key);
        return rc;
    }

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    VIR_DEBUG("Get value %s", keypath);
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    rc = virFileReadAll(keypath, 1024, value);
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    if (rc < 0) {
        DEBUG("Failed to read %s: %m\n", keypath);
        rc = -errno;
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    } else {
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        /* Terminated with '\n' has sometimes harmful effects to the caller */
        char *p = strchr(*value, '\n');
        if (p) *p = '\0';

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        rc = 0;
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    }

    VIR_FREE(keypath);

    return rc;
}

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static int virCgroupSetValueU64(virCgroupPtr group,
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                                int controller,
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                                const char *key,
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                                unsigned long long int value)
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{
    char *strval = NULL;
    int rc;

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    if (virAsprintf(&strval, "%llu", value) == -1)
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        return -ENOMEM;

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    rc = virCgroupSetValueStr(group, controller, key, strval);
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    VIR_FREE(strval);

    return rc;
}


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#if 0
/* This is included for completeness, but not yet used */

static int virCgroupSetValueI64(virCgroupPtr group,
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                                int controller,
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                                const char *key,
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                                long long int value)
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{
    char *strval = NULL;
    int rc;

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    if (virAsprintf(&strval, "%lld", value) == -1)
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        return -ENOMEM;

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    rc = virCgroupSetValueStr(group, controller, key, strval);
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    VIR_FREE(strval);

    return rc;
}

static int virCgroupGetValueI64(virCgroupPtr group,
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                                int controller,
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                                const char *key,
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                                long long int *value)
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{
    char *strval = NULL;
    int rc = 0;

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    rc = virCgroupGetValueStr(group, controller, key, &strval);
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    if (rc != 0)
        goto out;

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    if (sscanf(strval, "%" SCNi64, value) != 1)
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        rc = -EINVAL;
out:
    VIR_FREE(strval);

    return rc;
}
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#endif
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static int virCgroupGetValueU64(virCgroupPtr group,
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                                int controller,
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                                const char *key,
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                                unsigned long long int *value)
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{
    char *strval = NULL;
    int rc = 0;

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    rc = virCgroupGetValueStr(group, controller, key, &strval);
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    if (rc != 0)
        goto out;

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    if (virStrToLong_ull(strval, NULL, 10, value) < 0)
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        rc = -EINVAL;
out:
    VIR_FREE(strval);

    return rc;
}


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#ifdef HAVE_MNTENT_H
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static int virCgroupCpuSetInherit(virCgroupPtr parent, virCgroupPtr group)
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{
    int i;
    int rc = 0;
    const char *inherit_values[] = {
        "cpuset.cpus",
        "cpuset.mems",
    };

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    VIR_DEBUG("Setting up inheritance %s -> %s", parent->path, group->path);
    for (i = 0; i < ARRAY_CARDINALITY(inherit_values) ; i++) {
        char *value;
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        rc = virCgroupGetValueStr(parent,
                                  VIR_CGROUP_CONTROLLER_CPUSET,
                                  inherit_values[i],
                                  &value);
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        if (rc != 0) {
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            VIR_ERROR("Failed to get %s %d", inherit_values[i], rc);
            break;
        }

        VIR_DEBUG("Inherit %s = %s", inherit_values[i], value);

        rc = virCgroupSetValueStr(group,
                                  VIR_CGROUP_CONTROLLER_CPUSET,
                                  inherit_values[i],
                                  value);
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        VIR_FREE(value);
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        if (rc != 0) {
            VIR_ERROR("Failed to set %s %d", inherit_values[i], rc);
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            break;
        }
    }

    return rc;
}

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static int virCgroupMakeGroup(virCgroupPtr parent, virCgroupPtr group, int create)
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{
    int i;
    int rc = 0;

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    VIR_DEBUG("Make group %s", group->path);
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    for (i = 0 ; i < VIR_CGROUP_CONTROLLER_LAST ; i++) {
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        char *path = NULL;

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        /* Skip over controllers that aren't mounted */
        if (!group->controllers[i].mountPoint)
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            continue;

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        rc = virCgroupPathOfController(group, i, "", &path);
        if (rc < 0)
            return rc;
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        VIR_DEBUG("Make controller %s", path);
465
        if (access(path, F_OK) != 0) {
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            if (!create ||
                mkdir(path, 0755) < 0) {
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                rc = -errno;
                VIR_FREE(path);
                break;
            }
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            if (group->controllers[VIR_CGROUP_CONTROLLER_CPUSET].mountPoint != NULL &&
                (i == VIR_CGROUP_CONTROLLER_CPUSET ||
                 STREQ(group->controllers[i].mountPoint, group->controllers[VIR_CGROUP_CONTROLLER_CPUSET].mountPoint))) {
                rc = virCgroupCpuSetInherit(parent, group);
                if (rc != 0)
                    break;
            }
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        }

        VIR_FREE(path);
    }

    return rc;
}

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static int virCgroupNew(const char *path,
                        virCgroupPtr *group)
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{
    int rc = 0;
    char *typpath = NULL;

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    VIR_DEBUG("New group %s", path);
    *group = NULL;
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497
    if (VIR_ALLOC((*group)) != 0) {
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        rc = -ENOMEM;
        goto err;
    }

502
    if (!((*group)->path = strdup(path))) {
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        rc = -ENOMEM;
        goto err;
    }

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    rc = virCgroupDetect(*group);
    if (rc < 0)
        goto err;
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    return rc;
err:
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    virCgroupFree(group);
    *group = NULL;
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    VIR_FREE(typpath);

    return rc;
}

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static int virCgroupAppRoot(int privileged,
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                            virCgroupPtr *group,
                            int create)
524
{
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    virCgroupPtr rootgrp = NULL;
    int rc;
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    rc = virCgroupNew("/", &rootgrp);
    if (rc != 0)
        return rc;
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    if (privileged) {
        rc = virCgroupNew("/libvirt", group);
    } else {
        char *rootname;
        char *username;
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        username = virGetUserName(getuid());
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        if (!username) {
            rc = -ENOMEM;
            goto cleanup;
        }
        rc = virAsprintf(&rootname, "/libvirt-%s", username);
        VIR_FREE(username);
        if (rc < 0) {
            rc = -ENOMEM;
            goto cleanup;
        }
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        rc = virCgroupNew(rootname, group);
        VIR_FREE(rootname);
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    }
    if (rc != 0)
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        goto cleanup;
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    rc = virCgroupMakeGroup(rootgrp, *group, create);
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cleanup:
    virCgroupFree(&rootgrp);
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    return rc;
}
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#endif
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/**
 * virCgroupRemove:
 *
 * @group: The group to be removed
 *
 * Returns: 0 on success
 */
int virCgroupRemove(virCgroupPtr group)
{
    int rc = 0;
    int i;
    char *grppath = NULL;

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    for (i = 0 ; i < VIR_CGROUP_CONTROLLER_LAST ; i++) {
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        /* Skip over controllers not mounted */
        if (!group->controllers[i].mountPoint)
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            continue;

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        if (virCgroupPathOfController(group,
                                      i,
                                      NULL,
                                      &grppath) != 0)
            continue;
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        DEBUG("Removing cgroup %s", grppath);
        if (rmdir(grppath) != 0 && errno != ENOENT) {
            rc = -errno;
        }
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        VIR_FREE(grppath);
    }

    return rc;
}

/**
 * virCgroupAddTask:
 *
 * @group: The cgroup to add a task to
 * @pid: The pid of the task to add
 *
 * Returns: 0 on success
 */
int virCgroupAddTask(virCgroupPtr group, pid_t pid)
{
    int rc = 0;
    int i;

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    for (i = 0 ; i < VIR_CGROUP_CONTROLLER_LAST ; i++) {
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        /* Skip over controllers not mounted */
        if (!group->controllers[i].mountPoint)
            continue;
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        rc = virCgroupSetValueU64(group, i, "tasks", (unsigned long long)pid);
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        if (rc != 0)
            break;
    }

    return rc;
}

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/**
625
 * virCgroupForDriver:
626
 *
627
 * @name: name of this driver (e.g., xen, qemu, lxc)
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 * @group: Pointer to returned virCgroupPtr
 *
 * Returns 0 on success
 */
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#ifdef HAVE_MNTENT_H
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int virCgroupForDriver(const char *name,
                       virCgroupPtr *group,
                       int privileged,
                       int create)
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{
    int rc;
639
    char *path = NULL;
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    virCgroupPtr rootgrp = NULL;
641

642
    rc = virCgroupAppRoot(privileged, &rootgrp, create);
643
    if (rc != 0)
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        goto out;

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    if (virAsprintf(&path, "%s/%s", rootgrp->path, name) < 0) {
        rc = -ENOMEM;
648
        goto out;
649
    }
650

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    rc = virCgroupNew(path, group);
    VIR_FREE(path);

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    if (rc == 0) {
        rc = virCgroupMakeGroup(rootgrp, *group, create);
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        if (rc != 0)
            virCgroupFree(group);
    }
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660
out:
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    virCgroupFree(&rootgrp);
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    return rc;
}
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#else
int virCgroupForDriver(const char *name ATTRIBUTE_UNUSED,
                       virCgroupPtr *group ATTRIBUTE_UNUSED,
                       int privileged ATTRIBUTE_UNUSED,
                       int create ATTRIBUTE_UNUSED)
{
    /* Claim no support */
    return -ENXIO;
}
#endif
675

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/**
 * virCgroupForDomain:
 *
 * @driver: group for driver owning the domain
 * @name: name of the domain
 * @group: Pointer to returned virCgroupPtr
 *
 * Returns 0 on success
 */
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#ifdef HAVE_MNTENT_H
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int virCgroupForDomain(virCgroupPtr driver,
                       const char *name,
                       virCgroupPtr *group,
                       int create)
{
    int rc;
    char *path;

    if (virAsprintf(&path, "%s/%s", driver->path, name) < 0)
        return -ENOMEM;

    rc = virCgroupNew(path, group);
    VIR_FREE(path);

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    if (rc == 0) {
        rc = virCgroupMakeGroup(driver, *group, create);
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        if (rc != 0)
            virCgroupFree(group);
    }

    return rc;
}
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#else
int virCgroupForDomain(virCgroupPtr driver ATTRIBUTE_UNUSED,
                       const char *name ATTRIBUTE_UNUSED,
                       virCgroupPtr *group ATTRIBUTE_UNUSED,
                       int create ATTRIBUTE_UNUSED)
{
    return -ENXIO;
}
#endif
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/**
 * virCgroupSetMemory:
 *
 * @group: The cgroup to change memory for
 * @kb: The memory amount in kilobytes
 *
 * Returns: 0 on success
 */
int virCgroupSetMemory(virCgroupPtr group, unsigned long kb)
{
    return virCgroupSetValueU64(group,
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                                VIR_CGROUP_CONTROLLER_MEMORY,
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                                "memory.limit_in_bytes",
                                kb << 10);
}

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/**
 * virCgroupGetMemoryUsage:
 *
 * @group: The cgroup to change memory for
 * @kb: Pointer to returned used memory in kilobytes
 *
 * Returns: 0 on success
 */
int virCgroupGetMemoryUsage(virCgroupPtr group, unsigned long *kb)
{
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    long long unsigned int usage_in_bytes;
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    int ret;
    ret = virCgroupGetValueU64(group,
                               VIR_CGROUP_CONTROLLER_MEMORY,
                               "memory.usage_in_bytes", &usage_in_bytes);
    if (ret == 0)
        *kb = (unsigned long) usage_in_bytes >> 10;
    return ret;
}

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/**
 * virCgroupDenyAllDevices:
 *
 * @group: The cgroup to deny devices for
 *
 * Returns: 0 on success
 */
int virCgroupDenyAllDevices(virCgroupPtr group)
{
    return virCgroupSetValueStr(group,
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                                VIR_CGROUP_CONTROLLER_DEVICES,
                                "devices.deny",
                                "a");
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}

/**
 * virCgroupAllowDevice:
 *
 * @group: The cgroup to allow a device for
 * @type: The device type (i.e., 'c' or 'b')
 * @major: The major number of the device
 * @minor: The minor number of the device
 *
 * Returns: 0 on success
 */
780
int virCgroupAllowDevice(virCgroupPtr group, char type, int major, int minor)
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{
    int rc;
    char *devstr = NULL;

785
    if (virAsprintf(&devstr, "%c %i:%i rwm", type, major, minor) == -1) {
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        rc = -ENOMEM;
        goto out;
    }

    rc = virCgroupSetValueStr(group,
791
                              VIR_CGROUP_CONTROLLER_DEVICES,
792 793 794 795 796 797 798
                              "devices.allow",
                              devstr);
out:
    VIR_FREE(devstr);

    return rc;
}
799

800 801 802 803 804 805 806 807 808
/**
 * virCgroupAllowDeviceMajor:
 *
 * @group: The cgroup to allow an entire device major type for
 * @type: The device type (i.e., 'c' or 'b')
 * @major: The major number of the device type
 *
 * Returns: 0 on success
 */
809
int virCgroupAllowDeviceMajor(virCgroupPtr group, char type, int major)
810 811 812 813
{
    int rc;
    char *devstr = NULL;

814
    if (virAsprintf(&devstr, "%c %i:* rwm", type, major) == -1) {
815 816 817 818 819
        rc = -ENOMEM;
        goto out;
    }

    rc = virCgroupSetValueStr(group,
820
                              VIR_CGROUP_CONTROLLER_DEVICES,
821 822 823 824 825 826 827 828
                              "devices.allow",
                              devstr);
 out:
    VIR_FREE(devstr);

    return rc;
}

829 830 831 832 833 834 835 836 837 838 839
/**
 * virCgroupAllowDevicePath:
 *
 * @group: The cgroup to allow the device for
 * @path: the device to allow
 *
 * Queries the type of device and its major/minor number, and
 * adds that to the cgroup ACL
 *
 * Returns: 0 on success
 */
D
Daniel P. Berrange 已提交
840
#if defined(major) && defined(minor)
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855
int virCgroupAllowDevicePath(virCgroupPtr group, const char *path)
{
    struct stat sb;

    if (stat(path, &sb) < 0)
        return -errno;

    if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode))
        return -EINVAL;

    return virCgroupAllowDevice(group,
                                S_ISCHR(sb.st_mode) ? 'c' : 'b',
                                major(sb.st_rdev),
                                minor(sb.st_rdev));
}
D
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#else
int virCgroupAllowDevicePath(virCgroupPtr group ATTRIBUTE_UNUSED,
                             const char *path ATTRIBUTE_UNUSED)
{
    return -ENOSYS;
}
#endif

864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923

/**
 * virCgroupDenyDevice:
 *
 * @group: The cgroup to deny a device for
 * @type: The device type (i.e., 'c' or 'b')
 * @major: The major number of the device
 * @minor: The minor number of the device
 *
 * Returns: 0 on success
 */
int virCgroupDenyDevice(virCgroupPtr group, char type, int major, int minor)
{
    int rc;
    char *devstr = NULL;

    if (virAsprintf(&devstr, "%c %i:%i rwm", type, major, minor) == -1) {
        rc = -ENOMEM;
        goto out;
    }

    rc = virCgroupSetValueStr(group,
                              VIR_CGROUP_CONTROLLER_DEVICES,
                              "devices.deny",
                              devstr);
out:
    VIR_FREE(devstr);

    return rc;
}

/**
 * virCgroupDenyDeviceMajor:
 *
 * @group: The cgroup to deny an entire device major type for
 * @type: The device type (i.e., 'c' or 'b')
 * @major: The major number of the device type
 *
 * Returns: 0 on success
 */
int virCgroupDenyDeviceMajor(virCgroupPtr group, char type, int major)
{
    int rc;
    char *devstr = NULL;

    if (virAsprintf(&devstr, "%c %i:* rwm", type, major) == -1) {
        rc = -ENOMEM;
        goto out;
    }

    rc = virCgroupSetValueStr(group,
                              VIR_CGROUP_CONTROLLER_DEVICES,
                              "devices.deny",
                              devstr);
 out:
    VIR_FREE(devstr);

    return rc;
}

D
Daniel P. Berrange 已提交
924
#if defined(major) && defined(minor)
925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
int virCgroupDenyDevicePath(virCgroupPtr group, const char *path)
{
    struct stat sb;

    if (stat(path, &sb) < 0)
        return -errno;

    if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode))
        return -EINVAL;

    return virCgroupDenyDevice(group,
                               S_ISCHR(sb.st_mode) ? 'c' : 'b',
                               major(sb.st_rdev),
                               minor(sb.st_rdev));
}
D
Daniel P. Berrange 已提交
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#else
int virCgroupDenyDevicePath(virCgroupPtr group ATTRIBUTE_UNUSED,
                            const char *path ATTRIBUTE_UNUSED)
{
    return -ENOSYS;
}
#endif
947

948
int virCgroupSetCpuShares(virCgroupPtr group, unsigned long long shares)
949
{
950 951
    return virCgroupSetValueU64(group,
                                VIR_CGROUP_CONTROLLER_CPU,
D
Daniel P. Berrange 已提交
952
                                "cpu.shares", shares);
953 954
}

955
int virCgroupGetCpuShares(virCgroupPtr group, unsigned long long *shares)
956
{
957 958
    return virCgroupGetValueU64(group,
                                VIR_CGROUP_CONTROLLER_CPU,
D
Daniel P. Berrange 已提交
959
                                "cpu.shares", shares);
960
}
961 962 963

int virCgroupGetCpuacctUsage(virCgroupPtr group, unsigned long long *usage)
{
964 965
    return virCgroupGetValueU64(group,
                                VIR_CGROUP_CONTROLLER_CPUACCT,
D
Daniel P. Berrange 已提交
966
                                "cpuacct.usage", usage);
967
}
R
Ryota Ozaki 已提交
968 969 970 971 972 973 974 975 976 977

int virCgroupSetFreezerState(virCgroupPtr group, const char *state)
{
    return virCgroupSetValueStr(group,
                                VIR_CGROUP_CONTROLLER_CPU,
                                "freezer.state", state);
}

int virCgroupGetFreezerState(virCgroupPtr group, char **state)
{
978
    return virCgroupGetValueStr(group,
R
Ryota Ozaki 已提交
979 980 981
                                VIR_CGROUP_CONTROLLER_CPU,
                                "freezer.state", state);
}