nodeinfo.c 54.1 KB
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/*
 * nodeinfo.c: Helper routines for OS specific node information
 *
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 * Copyright (C) 2006-2008, 2010-2014 Red Hat, Inc.
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 * Copyright (C) 2006 Daniel P. Berrange
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library.  If not, see
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 * <http://www.gnu.org/licenses/>.
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 *
 * Author: Daniel P. Berrange <berrange@redhat.com>
 */

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#include <config.h>
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
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#include <stdint.h>
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#include <errno.h>
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#include <dirent.h>
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#include <sys/utsname.h>
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#include <sched.h>
34
#include "conf/domain_conf.h"
35

36
#if defined(__FreeBSD__) || defined(__APPLE__)
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# include <sys/time.h>
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# include <sys/types.h>
# include <sys/sysctl.h>
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# include <sys/resource.h>
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#endif

43
#include "c-ctype.h"
44
#include "viralloc.h"
45
#include "nodeinfopriv.h"
46
#include "physmem.h"
47
#include "virerror.h"
48
#include "count-one-bits.h"
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#include "intprops.h"
50
#include "virarch.h"
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#include "virfile.h"
52
#include "virtypedparam.h"
53
#include "virstring.h"
54
#include "virnuma.h"
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#define VIR_FROM_THIS VIR_FROM_NONE

58
#if defined(__FreeBSD__) || defined(__APPLE__)
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static int
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appleFreebsdNodeGetCPUCount(void)
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{
    int ncpu_mib[2] = { CTL_HW, HW_NCPU };
    unsigned long ncpu;
    size_t ncpu_len = sizeof(ncpu);

    if (sysctl(ncpu_mib, 2, &ncpu, &ncpu_len, NULL, 0) == -1) {
        virReportSystemError(errno, "%s", _("Cannot obtain CPU count"));
        return -1;
    }

    return ncpu;
}
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/* VIR_HW_PHYSMEM - the resulting value of HW_PHYSMEM of FreeBSD
 * is 64 bits while that of Mac OS X is still 32 bits.
 * Mac OS X provides HW_MEMSIZE for 64 bits version of HW_PHYSMEM
 * since 10.6.8 (Snow Leopard) at least.
 */
# ifdef HW_MEMSIZE
#  define VIR_HW_PHYSMEM HW_MEMSIZE
# else
#  define VIR_HW_PHYSMEM HW_PHYSMEM
# endif
static int
appleFreebsdNodeGetMemorySize(unsigned long *memory)
{
    int mib[2] = { CTL_HW, VIR_HW_PHYSMEM };
    unsigned long physmem;
    size_t len = sizeof(physmem);

    if (sysctl(mib, 2, &physmem, &len, NULL, 0) == -1) {
        virReportSystemError(errno, "%s", _("cannot obtain memory size"));
        return -1;
    }

    *memory = (unsigned long)(physmem / 1024);

    return 0;
}
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#endif /* defined(__FreeBSD__) || defined(__APPLE__) */

#ifdef __FreeBSD__
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# define BSD_CPU_STATS_ALL 4
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# define BSD_MEMORY_STATS_ALL 4

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# define TICK_TO_NSEC (1000ull * 1000ull * 1000ull / (stathz ? stathz : hz))

static int
freebsdNodeGetCPUStats(int cpuNum,
                       virNodeCPUStatsPtr params,
                       int *nparams)
{
    const char *sysctl_name;
    long *cpu_times;
    struct clockinfo clkinfo;
    size_t i, j, cpu_times_size, clkinfo_size;
    int cpu_times_num, offset, hz, stathz, ret = -1;
    struct field_cpu_map {
        const char *field;
        int idx[CPUSTATES];
    } cpu_map[] = {
        {VIR_NODE_CPU_STATS_KERNEL, {CP_SYS}},
        {VIR_NODE_CPU_STATS_USER, {CP_USER, CP_NICE}},
        {VIR_NODE_CPU_STATS_IDLE, {CP_IDLE}},
        {VIR_NODE_CPU_STATS_INTR, {CP_INTR}},
        {NULL, {0}}
    };

    if ((*nparams) == 0) {
        *nparams = BSD_CPU_STATS_ALL;
        return 0;
    }

    if ((*nparams) != BSD_CPU_STATS_ALL) {
        virReportInvalidArg(*nparams,
                            _("nparams in %s must be equal to %d"),
                            __FUNCTION__, BSD_CPU_STATS_ALL);
        return -1;
    }

    clkinfo_size = sizeof(clkinfo);
    if (sysctlbyname("kern.clockrate", &clkinfo, &clkinfo_size, NULL, 0) < 0) {
        virReportSystemError(errno,
                             _("sysctl failed for '%s'"),
                             "kern.clockrate");
        return -1;
    }

    stathz = clkinfo.stathz;
    hz = clkinfo.hz;

    if (cpuNum == VIR_NODE_CPU_STATS_ALL_CPUS) {
        sysctl_name = "kern.cp_time";
        cpu_times_num = 1;
        offset = 0;
    } else {
        sysctl_name = "kern.cp_times";
        cpu_times_num = appleFreebsdNodeGetCPUCount();

        if (cpuNum >= cpu_times_num) {
            virReportInvalidArg(cpuNum,
                                _("Invalid cpuNum in %s"),
                                __FUNCTION__);
            return -1;
        }

        offset = cpu_times_num * CPUSTATES;
    }

    cpu_times_size = sizeof(long) * cpu_times_num * CPUSTATES;

    if (VIR_ALLOC_N(cpu_times, cpu_times_num * CPUSTATES) < 0)
        goto cleanup;

    if (sysctlbyname(sysctl_name, cpu_times, &cpu_times_size, NULL, 0) < 0) {
        virReportSystemError(errno,
                             _("sysctl failed for '%s'"),
                             sysctl_name);
        goto cleanup;
    }

    for (i = 0; cpu_map[i].field != NULL; i++) {
        virNodeCPUStatsPtr param = &params[i];

        if (virStrcpyStatic(param->field, cpu_map[i].field) == NULL) {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("Field '%s' too long for destination"),
                           cpu_map[i].field);
            goto cleanup;
        }

        param->value = 0;
        for (j = 0; j < ARRAY_CARDINALITY(cpu_map[i].idx); j++)
            param->value += cpu_times[offset + cpu_map[i].idx[j]] * TICK_TO_NSEC;
    }

    ret = 0;

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 cleanup:
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    VIR_FREE(cpu_times);

    return ret;
}

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static int
freebsdNodeGetMemoryStats(virNodeMemoryStatsPtr params,
                               int *nparams)
{
    size_t i, j = 0;
    unsigned long pagesize = getpagesize() >> 10;
    long bufpages;
    size_t bufpages_size = sizeof(bufpages);
    struct field_sysctl_map {
        const char *field;
        const char *sysctl_name;
    } sysctl_map[] = {
        {VIR_NODE_MEMORY_STATS_TOTAL, "vm.stats.vm.v_page_count"},
        {VIR_NODE_MEMORY_STATS_FREE, "vm.stats.vm.v_free_count"},
        {VIR_NODE_MEMORY_STATS_CACHED, "vm.stats.vm.v_cache_count"},
        {NULL, NULL}
    };

    if ((*nparams) == 0) {
        *nparams = BSD_MEMORY_STATS_ALL;
        return 0;
    }

    if ((*nparams) != BSD_MEMORY_STATS_ALL) {
        virReportInvalidArg(nparams,
                            _("nparams in %s must be %d"),
                            __FUNCTION__, BSD_MEMORY_STATS_ALL);
        return -1;
    }

    for (i = 0; sysctl_map[i].field != NULL; i++) {
        u_int value;
        size_t value_size = sizeof(value);
        virNodeMemoryStatsPtr param;

        if (sysctlbyname(sysctl_map[i].sysctl_name, &value,
                         &value_size, NULL, 0) < 0) {
            virReportSystemError(errno,
                                 _("sysctl failed for '%s'"),
                                 sysctl_map[i].sysctl_name);
            return -1;
        }

        param = &params[j++];
        if (virStrcpyStatic(param->field, sysctl_map[i].field) == NULL) {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("Field '%s' too long for destination"),
                           sysctl_map[i].field);
            return -1;
        }
        param->value = (unsigned long long)value * pagesize;
    }

    {
        virNodeMemoryStatsPtr param = &params[j++];

        if (sysctlbyname("vfs.bufspace", &bufpages, &bufpages_size, NULL, 0) < 0) {
            virReportSystemError(errno,
                                 _("sysctl failed for '%s'"),
                                 "vfs.bufspace");
            return -1;
        }
        if (virStrcpyStatic(param->field, VIR_NODE_MEMORY_STATS_BUFFERS) == NULL) {
            virReportError(VIR_ERR_INTERNAL_ERROR,
                           _("Field '%s' too long for destination"),
                           VIR_NODE_MEMORY_STATS_BUFFERS);
            return -1;
        }
        param->value = (unsigned long long)bufpages >> 10;
    }

    return 0;
}
#endif /* __FreeBSD__ */
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#ifdef __linux__
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# define CPUINFO_PATH "/proc/cpuinfo"
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# define SYSFS_SYSTEM_PATH "/sys/devices/system"
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# define SYSFS_CPU_PATH SYSFS_SYSTEM_PATH"/cpu"
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# define PROCSTAT_PATH "/proc/stat"
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# define MEMINFO_PATH "/proc/meminfo"
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# define SYSFS_MEMORY_SHARED_PATH "/sys/kernel/mm/ksm"
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# define SYSFS_THREAD_SIBLINGS_LIST_LENGTH_MAX 1024
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# define LINUX_NB_CPU_STATS 4
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# define LINUX_NB_MEMORY_STATS_ALL 4
# define LINUX_NB_MEMORY_STATS_CELL 2
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/* Return the positive decimal contents of the given
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 * DIR/cpu%u/FILE, or -1 on error.  If DEFAULT_VALUE is non-negative
 * and the file could not be found, return that instead of an error;
 * this is useful for machines that cannot hot-unplug cpu0, or where
 * hot-unplugging is disabled, or where the kernel is too old
 * to support NUMA cells, etc.  */
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static int
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virNodeGetCpuValue(const char *dir, unsigned int cpu, const char *file,
301
                   int default_value)
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{
    char *path;
    FILE *pathfp;
    int value = -1;
    char value_str[INT_BUFSIZE_BOUND(value)];
    char *tmp;

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    if (virAsprintf(&path, "%s/cpu%u/%s", dir, cpu, file) < 0)
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        return -1;

    pathfp = fopen(path, "r");
    if (pathfp == NULL) {
314 315
        if (default_value >= 0 && errno == ENOENT)
            value = default_value;
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        else
            virReportSystemError(errno, _("cannot open %s"), path);
        goto cleanup;
    }

    if (fgets(value_str, sizeof(value_str), pathfp) == NULL) {
        virReportSystemError(errno, _("cannot read from %s"), path);
        goto cleanup;
    }
    if (virStrToLong_i(value_str, &tmp, 10, &value) < 0) {
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        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("could not convert '%s' to an integer"),
                       value_str);
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        goto cleanup;
    }

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 cleanup:
333
    VIR_FORCE_FCLOSE(pathfp);
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    VIR_FREE(path);

    return value;
}

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static unsigned long
virNodeCountThreadSiblings(const char *dir, unsigned int cpu)
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{
    unsigned long ret = 0;
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    char *path;
    FILE *pathfp;
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    char str[1024];
346
    size_t i;
347

348
    if (virAsprintf(&path, "%s/cpu%u/topology/thread_siblings",
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                    dir, cpu) < 0)
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        return 0;

    pathfp = fopen(path, "r");
    if (pathfp == NULL) {
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        /* If file doesn't exist, then pretend our only
         * sibling is ourself */
        if (errno == ENOENT) {
            VIR_FREE(path);
            return 1;
        }
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        virReportSystemError(errno, _("cannot open %s"), path);
        VIR_FREE(path);
        return 0;
    }

    if (fgets(str, sizeof(str), pathfp) == NULL) {
        virReportSystemError(errno, _("cannot read from %s"), path);
        goto cleanup;
    }

    i = 0;
    while (str[i] != '\0') {
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        if (c_isdigit(str[i]))
373
            ret += count_one_bits(str[i] - '0');
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        else if (str[i] >= 'A' && str[i] <= 'F')
            ret += count_one_bits(str[i] - 'A' + 10);
        else if (str[i] >= 'a' && str[i] <= 'f')
            ret += count_one_bits(str[i] - 'a' + 10);
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        i++;
    }

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 cleanup:
382
    VIR_FORCE_FCLOSE(pathfp);
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    VIR_FREE(path);

    return ret;
}

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static int
virNodeParseSocket(const char *dir, unsigned int cpu)
390
{
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    int ret = virNodeGetCpuValue(dir, cpu, "topology/physical_package_id",
392
                                 0);
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# if defined(__powerpc__) || \
394 395
    defined(__powerpc64__) || \
    defined(__s390__) || \
396 397
    defined(__s390x__) || \
    defined(__aarch64__)
398
    /* ppc and s390(x) has -1 */
399 400
    if (ret < 0)
        ret = 0;
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# endif
402
    return ret;
403 404
}

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# ifndef CPU_COUNT
static int
CPU_COUNT(cpu_set_t *set)
{
409
    size_t i, count = 0;
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    for (i = 0; i < CPU_SETSIZE; i++)
        if (CPU_ISSET(i, set))
            count++;
    return count;
}
# endif /* !CPU_COUNT */

418 419
/* parses a node entry, returning number of processors in the node and
 * filling arguments */
420
static int
421 422
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4)
423 424 425 426 427 428
ATTRIBUTE_NONNULL(5)
virNodeParseNode(const char *node,
                 int *sockets,
                 int *cores,
                 int *threads,
                 int *offline)
429 430
{
    int ret = -1;
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    int processors = 0;
    DIR *cpudir = NULL;
    struct dirent *cpudirent = NULL;
    int sock_max = 0;
    cpu_set_t sock_map;
    int sock;
    cpu_set_t *core_maps = NULL;
    int core;
439
    size_t i;
440 441 442
    int siblings;
    unsigned int cpu;
    int online;
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    int direrr;
444

445 446 447 448 449 450
    *threads = 0;
    *cores = 0;
    *sockets = 0;

    if (!(cpudir = opendir(node))) {
        virReportSystemError(errno, _("cannot opendir %s"), node);
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        goto cleanup;
    }
453 454 455

    /* enumerate sockets in the node */
    CPU_ZERO(&sock_map);
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    while ((direrr = virDirRead(cpudir, &cpudirent, node)) > 0) {
457 458 459
        if (sscanf(cpudirent->d_name, "cpu%u", &cpu) != 1)
            continue;

460
        if ((online = virNodeGetCpuValue(node, cpu, "online", 1)) < 0)
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            goto cleanup;

        if (!online)
            continue;

466
        /* Parse socket */
467 468
        if ((sock = virNodeParseSocket(node, cpu)) < 0)
            goto cleanup;
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        CPU_SET(sock, &sock_map);

        if (sock > sock_max)
            sock_max = sock;
    }

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    if (direrr < 0)
476
        goto cleanup;
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    sock_max++;

    /* allocate cpu maps for each socket */
481
    if (VIR_ALLOC_N(core_maps, sock_max) < 0)
482
        goto cleanup;
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    for (i = 0; i < sock_max; i++)
        CPU_ZERO(&core_maps[i]);

    /* iterate over all CPU's in the node */
    rewinddir(cpudir);
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    while ((direrr = virDirRead(cpudir, &cpudirent, node)) > 0) {
490 491 492
        if (sscanf(cpudirent->d_name, "cpu%u", &cpu) != 1)
            continue;

493
        if ((online = virNodeGetCpuValue(node, cpu, "online", 1)) < 0)
494 495
            goto cleanup;

496 497
        if (!online) {
            (*offline)++;
498
            continue;
499
        }
500 501 502 503

        processors++;

        /* Parse socket */
504 505
        if ((sock = virNodeParseSocket(node, cpu)) < 0)
            goto cleanup;
506
        if (!CPU_ISSET(sock, &sock_map)) {
507 508
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("CPU socket topology has changed"));
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            goto cleanup;
        }

        /* Parse core */
# if defined(__s390__) || \
    defined(__s390x__)
        /* logical cpu is equivalent to a core on s390 */
        core = cpu;
# else
518
        core = virNodeGetCpuValue(node, cpu, "topology/core_id", 0);
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# endif

        CPU_SET(core, &core_maps[sock]);

        if (!(siblings = virNodeCountThreadSiblings(node, cpu)))
            goto cleanup;

        if (siblings > *threads)
            *threads = siblings;
    }

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    if (direrr < 0)
531
        goto cleanup;
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    /* finalize the returned data */
    *sockets = CPU_COUNT(&sock_map);

    for (i = 0; i < sock_max; i++) {
        if (!CPU_ISSET(i, &sock_map))
            continue;

        core = CPU_COUNT(&core_maps[i]);
        if (core > *cores)
            *cores = core;
    }

    ret = processors;
546

547
 cleanup:
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    /* don't shadow a more serious error */
    if (cpudir && closedir(cpudir) < 0 && ret >= 0) {
        virReportSystemError(errno, _("problem closing %s"), node);
        ret = -1;
    }
    VIR_FREE(core_maps);

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    return ret;
}

558
int linuxNodeInfoCPUPopulate(FILE *cpuinfo,
559
                             const char *sysfs_dir,
560
                             virNodeInfoPtr nodeinfo)
561
{
562
    char line[1024];
563 564
    DIR *nodedir = NULL;
    struct dirent *nodedirent = NULL;
565
    int cpus, cores, socks, threads, offline = 0;
566
    unsigned int node;
567
    int ret = -1;
568
    char *sysfs_nodedir = NULL;
569
    char *sysfs_cpudir = NULL;
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    int direrr;
571

572
    /* Start with parsing CPU clock speed from /proc/cpuinfo */
573
    while (fgets(line, sizeof(line), cpuinfo) != NULL) {
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# if defined(__x86_64__) || \
575 576
    defined(__amd64__)  || \
    defined(__i386__)
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        char *buf = line;
578
        if (STRPREFIX(buf, "cpu MHz")) {
579 580
            char *p;
            unsigned int ui;
581

582
            buf += 7;
583
            while (*buf && c_isspace(*buf))
584
                buf++;
585

586
            if (*buf != ':' || !buf[1]) {
587 588
                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                               _("parsing cpu MHz from cpuinfo"));
589
                goto cleanup;
590
            }
591

592
            if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0 &&
593
                /* Accept trailing fractional part.  */
594
                (*p == '\0' || *p == '.' || c_isspace(*p)))
595
                nodeinfo->mhz = ui;
596
        }
597

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# elif defined(__powerpc__) || \
599
      defined(__powerpc64__)
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        char *buf = line;
601
        if (STRPREFIX(buf, "clock")) {
602 603
            char *p;
            unsigned int ui;
604

605 606 607
            buf += 5;
            while (*buf && c_isspace(*buf))
                buf++;
608

609
            if (*buf != ':' || !buf[1]) {
610 611
                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                               _("parsing cpu MHz from cpuinfo"));
612
                goto cleanup;
613
            }
614

615
            if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0 &&
616
                /* Accept trailing fractional part.  */
617
                (*p == '\0' || *p == '.' || c_isspace(*p)))
618
                nodeinfo->mhz = ui;
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            /* No other interesting infos are available in /proc/cpuinfo.
             * However, there is a line identifying processor's version,
             * identification and machine, but we don't want it to be caught
             * and parsed in next iteration, because it is not in expected
             * format and thus lead to error. */
624
        }
625
# elif defined(__arm__) || defined(__aarch64__)
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        char *buf = line;
        if (STRPREFIX(buf, "BogoMIPS")) {
            char *p;
            unsigned int ui;

            buf += 8;
            while (*buf && c_isspace(*buf))
                buf++;

            if (*buf != ':' || !buf[1]) {
636 637
                virReportError(VIR_ERR_INTERNAL_ERROR,
                               "%s", _("parsing cpu MHz from cpuinfo"));
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                goto cleanup;
            }

            if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0
                /* Accept trailing fractional part.  */
                && (*p == '\0' || *p == '.' || c_isspace(*p)))
                nodeinfo->mhz = ui;
        }
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# elif defined(__s390__) || \
      defined(__s390x__)
        /* s390x has no realistic value for CPU speed,
         * assign a value of zero to signify this */
        nodeinfo->mhz = 0;
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# else
#  warning Parser for /proc/cpuinfo needs to be adapted for your architecture
# endif
654 655
    }

656 657
    /* OK, we've parsed clock speed out of /proc/cpuinfo. Get the
     * core, node, socket, thread and topology information from /sys
658
     */
659
    if (virAsprintf(&sysfs_nodedir, "%s/node", sysfs_dir) < 0)
660
        goto cleanup;
661

662 663 664 665
    if (!(nodedir = opendir(sysfs_nodedir))) {
        /* the host isn't probably running a NUMA architecture */
        goto fallback;
    }
666

N
Natanael Copa 已提交
667
    while ((direrr = virDirRead(nodedir, &nodedirent, sysfs_nodedir)) > 0) {
668
        if (sscanf(nodedirent->d_name, "node%u", &node) != 1)
669 670
            continue;

671 672 673
        nodeinfo->nodes++;

        if (virAsprintf(&sysfs_cpudir, "%s/node/%s",
674
                        sysfs_dir, nodedirent->d_name) < 0)
675
            goto cleanup;
E
Eric Blake 已提交
676

677 678
        if ((cpus = virNodeParseNode(sysfs_cpudir, &socks, &cores,
                                     &threads, &offline)) < 0)
679
            goto cleanup;
680

681
        VIR_FREE(sysfs_cpudir);
682

683 684 685 686 687 688 689 690 691 692
        nodeinfo->cpus += cpus;

        if (socks > nodeinfo->sockets)
            nodeinfo->sockets = socks;

        if (cores > nodeinfo->cores)
            nodeinfo->cores = cores;

        if (threads > nodeinfo->threads)
            nodeinfo->threads = threads;
693
    }
694

N
Natanael Copa 已提交
695
    if (direrr < 0)
696
        goto cleanup;
697 698 699 700

    if (nodeinfo->cpus && nodeinfo->nodes)
        goto done;

701
 fallback:
702 703
    VIR_FREE(sysfs_cpudir);

704
    if (virAsprintf(&sysfs_cpudir, "%s/cpu", sysfs_dir) < 0)
705
        goto cleanup;
706

707 708
    if ((cpus = virNodeParseNode(sysfs_cpudir, &socks, &cores,
                                 &threads, &offline)) < 0)
709
        goto cleanup;
710

711 712 713 714 715 716
    nodeinfo->nodes = 1;
    nodeinfo->cpus = cpus;
    nodeinfo->sockets = socks;
    nodeinfo->cores = cores;
    nodeinfo->threads = threads;

717
 done:
718
    /* There should always be at least one cpu, socket, node, and thread. */
719
    if (nodeinfo->cpus == 0) {
720
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no CPUs found"));
721
        goto cleanup;
722
    }
723

C
Chris Lalancette 已提交
724
    if (nodeinfo->sockets == 0) {
725
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no sockets found"));
726
        goto cleanup;
C
Chris Lalancette 已提交
727
    }
728

C
Chris Lalancette 已提交
729
    if (nodeinfo->threads == 0) {
730
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no threads found"));
731
        goto cleanup;
C
Chris Lalancette 已提交
732 733
    }

734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750
    /* Now check if the topology makes sense. There are machines that don't
     * expose their real number of nodes or for example the AMD Bulldozer
     * architecture that exposes their Clustered integer core modules as both
     * threads and cores. This approach throws off our detection. Unfortunately
     * the nodeinfo structure isn't designed to carry the full topology so
     * we're going to lie about the detected topology to notify the user
     * to check the host capabilities for the actual topology. */
    if ((nodeinfo->nodes *
         nodeinfo->sockets *
         nodeinfo->cores *
         nodeinfo->threads) != (nodeinfo->cpus + offline)) {
        nodeinfo->nodes = 1;
        nodeinfo->sockets = 1;
        nodeinfo->cores = nodeinfo->cpus + offline;
        nodeinfo->threads = 1;
    }

751 752
    ret = 0;

753
 cleanup:
754 755 756 757 758 759 760
    /* don't shadow a more serious error */
    if (nodedir && closedir(nodedir) < 0 && ret >= 0) {
        virReportSystemError(errno, _("problem closing %s"), sysfs_nodedir);
        ret = -1;
    }

    VIR_FREE(sysfs_nodedir);
761 762
    VIR_FREE(sysfs_cpudir);
    return ret;
763 764
}

J
Ján Tomko 已提交
765 766 767 768 769 770 771
static int
virNodeCPUStatsAssign(virNodeCPUStatsPtr param,
                      const char *name,
                      unsigned long long value)
{
    if (virStrcpyStatic(param->field, name) == NULL) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
772 773
                       "%s", _("kernel cpu time field is too long"
                               " for the destination"));
J
Ján Tomko 已提交
774 775 776 777 778 779
        return -1;
    }
    param->value = value;
    return 0;
}

780 781
# define TICK_TO_NSEC (1000ull * 1000ull * 1000ull / sysconf(_SC_CLK_TCK))

J
Ján Tomko 已提交
782
int
783 784 785 786
linuxNodeGetCPUStats(FILE *procstat,
                     int cpuNum,
                     virNodeCPUStatsPtr params,
                     int *nparams)
787 788 789 790 791
{
    int ret = -1;
    char line[1024];
    unsigned long long usr, ni, sys, idle, iowait;
    unsigned long long irq, softirq, steal, guest, guest_nice;
792
    char cpu_header[4 + INT_BUFSIZE_BOUND(cpuNum)];
793 794 795 796 797 798 799 800 801

    if ((*nparams) == 0) {
        /* Current number of cpu stats supported by linux */
        *nparams = LINUX_NB_CPU_STATS;
        ret = 0;
        goto cleanup;
    }

    if ((*nparams) != LINUX_NB_CPU_STATS) {
802 803 804
        virReportInvalidArg(*nparams,
                            _("nparams in %s must be equal to %d"),
                            __FUNCTION__, LINUX_NB_CPU_STATS);
805 806 807
        goto cleanup;
    }

808
    if (cpuNum == VIR_NODE_CPU_STATS_ALL_CPUS) {
809
        strcpy(cpu_header, "cpu ");
810
    } else {
811
        snprintf(cpu_header, sizeof(cpu_header), "cpu%d ", cpuNum);
812 813 814 815 816 817 818 819 820 821 822 823 824 825
    }

    while (fgets(line, sizeof(line), procstat) != NULL) {
        char *buf = line;

        if (STRPREFIX(buf, cpu_header)) { /* aka logical CPU time */
            if (sscanf(buf,
                       "%*s %llu %llu %llu %llu %llu" // user ~ iowait
                       "%llu %llu %llu %llu %llu",    // irq  ~ guest_nice
                       &usr, &ni, &sys, &idle, &iowait,
                       &irq, &softirq, &steal, &guest, &guest_nice) < 4) {
                continue;
            }

J
Ján Tomko 已提交
826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
            if (virNodeCPUStatsAssign(&params[0], VIR_NODE_CPU_STATS_KERNEL,
                                      (sys + irq + softirq) * TICK_TO_NSEC) < 0)
                goto cleanup;

            if (virNodeCPUStatsAssign(&params[1], VIR_NODE_CPU_STATS_USER,
                                      (usr + ni) * TICK_TO_NSEC) < 0)
                goto cleanup;

            if (virNodeCPUStatsAssign(&params[2], VIR_NODE_CPU_STATS_IDLE,
                                      idle * TICK_TO_NSEC) < 0)
                goto cleanup;

            if (virNodeCPUStatsAssign(&params[3], VIR_NODE_CPU_STATS_IOWAIT,
                                      iowait * TICK_TO_NSEC) < 0)
                goto cleanup;

842 843 844 845 846
            ret = 0;
            goto cleanup;
        }
    }

847 848 849
    virReportInvalidArg(cpuNum,
                        _("Invalid cpuNum in %s"),
                        __FUNCTION__);
850

851
 cleanup:
852 853 854
    return ret;
}

855 856 857 858 859
static int
linuxNodeGetMemoryStats(FILE *meminfo,
                        int cellNum,
                        virNodeMemoryStatsPtr params,
                        int *nparams)
860 861
{
    int ret = -1;
862
    size_t i = 0, j = 0, k = 0;
863 864 865
    int found = 0;
    int nr_param;
    char line[1024];
866
    char meminfo_hdr[VIR_NODE_MEMORY_STATS_FIELD_LENGTH];
867 868 869 870 871
    unsigned long val;
    struct field_conv {
        const char *meminfo_hdr;  // meminfo header
        const char *field;        // MemoryStats field name
    } field_conv[] = {
872 873 874 875
        {"MemTotal:", VIR_NODE_MEMORY_STATS_TOTAL},
        {"MemFree:",  VIR_NODE_MEMORY_STATS_FREE},
        {"Buffers:",  VIR_NODE_MEMORY_STATS_BUFFERS},
        {"Cached:",   VIR_NODE_MEMORY_STATS_CACHED},
876 877 878
        {NULL,        NULL}
    };

879
    if (cellNum == VIR_NODE_MEMORY_STATS_ALL_CELLS) {
880 881 882 883 884 885 886 887 888 889 890 891 892
        nr_param = LINUX_NB_MEMORY_STATS_ALL;
    } else {
        nr_param = LINUX_NB_MEMORY_STATS_CELL;
    }

    if ((*nparams) == 0) {
        /* Current number of memory stats supported by linux */
        *nparams = nr_param;
        ret = 0;
        goto cleanup;
    }

    if ((*nparams) != nr_param) {
893 894 895
        virReportInvalidArg(nparams,
                            _("nparams in %s must be %d"),
                            __FUNCTION__, nr_param);
896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
        goto cleanup;
    }

    while (fgets(line, sizeof(line), meminfo) != NULL) {
        char *buf = line;

        if (STRPREFIX(buf, "Node ")) {
            /*
             * /sys/devices/system/node/nodeX/meminfo format is below.
             * So, skip prefix "Node XX ".
             *
             * Node 0 MemTotal:        8386980 kB
             * Node 0 MemFree:         5300920 kB
             *         :
             */
            char *p;

            p = buf;
            for (i = 0; i < 2; i++) {
                p = strchr(p, ' ');
                if (p == NULL) {
917 918
                    virReportError(VIR_ERR_INTERNAL_ERROR,
                                   "%s", _("no prefix found"));
919 920 921 922 923 924 925 926 927 928 929 930 931 932
                    goto cleanup;
                }
                p++;
            }
            buf = p;
        }

        if (sscanf(buf, "%s %lu kB", meminfo_hdr, &val) < 2)
            continue;

        for (j = 0; field_conv[j].meminfo_hdr != NULL; j++) {
            struct field_conv *convp = &field_conv[j];

            if (STREQ(meminfo_hdr, convp->meminfo_hdr)) {
933
                virNodeMemoryStatsPtr param = &params[k++];
934 935

                if (virStrcpyStatic(param->field, convp->field) == NULL) {
936 937
                    virReportError(VIR_ERR_INTERNAL_ERROR,
                                   "%s", _("Field kernel memory too long for destination"));
938 939 940 941 942 943 944 945 946 947 948 949
                    goto cleanup;
                }
                param->value = val;
                found++;
                break;
            }
        }
        if (found >= nr_param)
            break;
    }

    if (found == 0) {
950 951
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       "%s", _("no available memory line found"));
952 953 954 955 956
        goto cleanup;
    }

    ret = 0;

957
 cleanup:
958 959
    return ret;
}
960

961 962 963 964 965 966 967 968 969

/* Determine the maximum cpu id from a Linux sysfs cpu/present file. */
static int
linuxParseCPUmax(const char *path)
{
    char *str = NULL;
    char *tmp;
    int ret = -1;

E
Eric Blake 已提交
970
    if (virFileReadAll(path, 5 * VIR_DOMAIN_CPUMASK_LEN, &str) < 0)
971 972 973 974 975 976 977 978 979 980 981 982 983 984
        goto cleanup;

    tmp = str;
    do {
        if (virStrToLong_i(tmp, &tmp, 10, &ret) < 0 ||
            !strchr(",-\n", *tmp)) {
            virReportError(VIR_ERR_NO_SUPPORT,
                           _("failed to parse %s"), path);
            ret = -1;
            goto cleanup;
        }
    } while (*tmp++ != '\n');
    ret++;

985
 cleanup:
986 987 988 989
    VIR_FREE(str);
    return ret;
}

990
/*
991 992 993
 * Linux maintains cpu bit map under cpu/online. For example, if
 * cpuid=5's flag is not set and max cpu is 7, the map file shows
 * 0-4,6-7. This function parses it and returns cpumap.
994
 */
H
Hu Tao 已提交
995
static virBitmapPtr
996
linuxParseCPUmap(int max_cpuid, const char *path)
997
{
H
Hu Tao 已提交
998
    virBitmapPtr map = NULL;
999 1000
    char *str = NULL;

1001
    if (virFileReadAll(path, 5 * VIR_DOMAIN_CPUMASK_LEN, &str) < 0)
1002 1003
        goto error;

1004
    if (virBitmapParse(str, 0, &map, max_cpuid) < 0)
1005 1006
        goto error;

H
Hu Tao 已提交
1007
    VIR_FREE(str);
1008 1009
    return map;

1010
 error:
1011
    VIR_FREE(str);
H
Hu Tao 已提交
1012
    virBitmapFree(map);
1013 1014
    return NULL;
}
E
Eric Blake 已提交
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033


static virBitmapPtr
virNodeGetSiblingsList(const char *dir, int cpu_id)
{
    char *path = NULL;
    char *buf = NULL;
    virBitmapPtr ret = NULL;

    if (virAsprintf(&path, "%s/cpu%u/topology/thread_siblings_list",
                    dir, cpu_id) < 0)
        goto cleanup;

    if (virFileReadAll(path, SYSFS_THREAD_SIBLINGS_LIST_LENGTH_MAX, &buf) < 0)
        goto cleanup;

    if (virBitmapParse(buf, 0, &ret, virNumaGetMaxCPUs()) < 0)
        goto cleanup;

1034
 cleanup:
E
Eric Blake 已提交
1035 1036 1037 1038
    VIR_FREE(buf);
    VIR_FREE(path);
    return ret;
}
1039 1040
#endif

1041
int nodeGetInfo(virNodeInfoPtr nodeinfo)
1042 1043
{
    virArch hostarch = virArchFromHost();
1044

1045 1046
    memset(nodeinfo, 0, sizeof(*nodeinfo));

1047
    if (virStrcpyStatic(nodeinfo->model, virArchToString(hostarch)) == NULL)
C
Chris Lalancette 已提交
1048
        return -1;
1049

1050
#ifdef __linux__
1051
    {
1052
    int ret = -1;
1053
    FILE *cpuinfo = fopen(CPUINFO_PATH, "r");
1054
    if (!cpuinfo) {
1055
        virReportSystemError(errno,
1056
                             _("cannot open %s"), CPUINFO_PATH);
1057 1058
        return -1;
    }
1059

1060
    ret = linuxNodeInfoCPUPopulate(cpuinfo, SYSFS_SYSTEM_PATH, nodeinfo);
1061 1062
    if (ret < 0)
        goto cleanup;
1063

1064
    /* Convert to KB. */
1065
    nodeinfo->memory = physmem_total() / 1024;
1066

1067
 cleanup:
1068
    VIR_FORCE_FCLOSE(cpuinfo);
1069
    return ret;
1070
    }
1071
#elif defined(__FreeBSD__) || defined(__APPLE__)
R
Roman Bogorodskiy 已提交
1072 1073 1074 1075 1076
    {
    nodeinfo->nodes = 1;
    nodeinfo->sockets = 1;
    nodeinfo->threads = 1;

1077
    nodeinfo->cpus = appleFreebsdNodeGetCPUCount();
R
Roman Bogorodskiy 已提交
1078 1079 1080 1081 1082 1083 1084 1085
    if (nodeinfo->cpus == -1)
        return -1;

    nodeinfo->cores = nodeinfo->cpus;

    unsigned long cpu_freq;
    size_t cpu_freq_len = sizeof(cpu_freq);

1086
# ifdef __FreeBSD__
R
Roman Bogorodskiy 已提交
1087 1088 1089 1090 1091 1092
    if (sysctlbyname("dev.cpu.0.freq", &cpu_freq, &cpu_freq_len, NULL, 0) < 0) {
        virReportSystemError(errno, "%s", _("cannot obtain CPU freq"));
        return -1;
    }

    nodeinfo->mhz = cpu_freq;
1093 1094 1095 1096 1097 1098 1099 1100
# else
    if (sysctlbyname("hw.cpufrequency", &cpu_freq, &cpu_freq_len, NULL, 0) < 0) {
        virReportSystemError(errno, "%s", _("cannot obtain CPU freq"));
        return -1;
    }

    nodeinfo->mhz = cpu_freq / 1000000;
# endif
R
Roman Bogorodskiy 已提交
1101

1102
    if (appleFreebsdNodeGetMemorySize(&nodeinfo->memory) < 0)
R
Roman Bogorodskiy 已提交
1103 1104 1105 1106
        return -1;

    return 0;
    }
1107 1108
#else
    /* XXX Solaris will need an impl later if they port QEMU driver */
1109 1110
    virReportError(VIR_ERR_NO_SUPPORT, "%s",
                   _("node info not implemented on this platform"));
1111 1112 1113
    return -1;
#endif
}
1114

1115
int nodeGetCPUStats(int cpuNum ATTRIBUTE_UNUSED,
1116
                    virNodeCPUStatsPtr params ATTRIBUTE_UNUSED,
1117
                    int *nparams ATTRIBUTE_UNUSED,
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
                    unsigned int flags)
{
    virCheckFlags(0, -1);

#ifdef __linux__
    {
        int ret;
        FILE *procstat = fopen(PROCSTAT_PATH, "r");
        if (!procstat) {
            virReportSystemError(errno,
                                 _("cannot open %s"), PROCSTAT_PATH);
            return -1;
        }
        ret = linuxNodeGetCPUStats(procstat, cpuNum, params, nparams);
        VIR_FORCE_FCLOSE(procstat);

        return ret;
    }
1136 1137
#elif defined(__FreeBSD__)
    return freebsdNodeGetCPUStats(cpuNum, params, nparams);
1138
#else
1139 1140
    virReportError(VIR_ERR_NO_SUPPORT, "%s",
                   _("node CPU stats not implemented on this platform"));
1141 1142 1143 1144
    return -1;
#endif
}

1145
int nodeGetMemoryStats(int cellNum ATTRIBUTE_UNUSED,
1146
                       virNodeMemoryStatsPtr params ATTRIBUTE_UNUSED,
1147
                       int *nparams ATTRIBUTE_UNUSED,
1148 1149 1150 1151 1152 1153 1154 1155 1156
                       unsigned int flags)
{
    virCheckFlags(0, -1);

#ifdef __linux__
    {
        int ret;
        char *meminfo_path = NULL;
        FILE *meminfo;
1157
        int max_node;
1158

1159
        if (cellNum == VIR_NODE_MEMORY_STATS_ALL_CELLS) {
1160
            if (VIR_STRDUP(meminfo_path, MEMINFO_PATH) < 0)
1161 1162
                return -1;
        } else {
1163
            if ((max_node = virNumaGetMaxNode()) < 0)
1164 1165
                return -1;

1166
            if (cellNum > max_node) {
1167 1168
                virReportInvalidArg(cellNum,
                                    _("cellNum in %s must be less than or equal to %d"),
1169
                                    __FUNCTION__, max_node);
1170 1171 1172
                return -1;
            }

1173
            if (virAsprintf(&meminfo_path, "%s/node/node%d/meminfo",
1174
                            SYSFS_SYSTEM_PATH, cellNum) < 0)
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190
                return -1;
        }
        meminfo = fopen(meminfo_path, "r");

        if (!meminfo) {
            virReportSystemError(errno,
                                 _("cannot open %s"), meminfo_path);
            VIR_FREE(meminfo_path);
            return -1;
        }
        ret = linuxNodeGetMemoryStats(meminfo, cellNum, params, nparams);
        VIR_FORCE_FCLOSE(meminfo);
        VIR_FREE(meminfo_path);

        return ret;
    }
1191 1192
#elif defined(__FreeBSD__)
    return freebsdNodeGetMemoryStats(params, nparams);
1193
#else
1194 1195
    virReportError(VIR_ERR_NO_SUPPORT, "%s",
                   _("node memory stats not implemented on this platform"));
1196 1197 1198 1199
    return -1;
#endif
}

1200 1201 1202
int
nodeGetCPUCount(void)
{
R
Roman Bogorodskiy 已提交
1203
#if defined(__linux__)
1204 1205 1206 1207 1208 1209
    /* To support older kernels that lack cpu/present, such as 2.6.18
     * in RHEL5, we fall back to count cpu/cpuNN entries; this assumes
     * that such kernels also lack hotplug, and therefore cpu/cpuNN
     * will be consecutive.
     */
    char *cpupath = NULL;
1210
    int ncpu;
1211 1212

    if (virFileExists(SYSFS_SYSTEM_PATH "/cpu/present")) {
1213
        ncpu = linuxParseCPUmax(SYSFS_SYSTEM_PATH "/cpu/present");
1214
    } else if (virFileExists(SYSFS_SYSTEM_PATH "/cpu/cpu0")) {
1215
        ncpu = 0;
1216
        do {
1217
            ncpu++;
1218 1219
            VIR_FREE(cpupath);
            if (virAsprintf(&cpupath, "%s/cpu/cpu%d",
1220
                            SYSFS_SYSTEM_PATH, ncpu) < 0)
1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
                return -1;
        } while (virFileExists(cpupath));
    } else {
        /* no cpu/cpu0: we give up */
        virReportError(VIR_ERR_NO_SUPPORT, "%s",
                       _("host cpu counting not supported on this node"));
        return -1;
    }

    VIR_FREE(cpupath);
1231
    return ncpu;
1232 1233
#elif defined(__FreeBSD__) || defined(__APPLE__)
    return appleFreebsdNodeGetCPUCount();
1234 1235 1236 1237 1238 1239 1240
#else
    virReportError(VIR_ERR_NO_SUPPORT, "%s",
                   _("host cpu counting not implemented on this platform"));
    return -1;
#endif
}

H
Hu Tao 已提交
1241
virBitmapPtr
1242
nodeGetCPUBitmap(int *max_id ATTRIBUTE_UNUSED)
1243 1244
{
#ifdef __linux__
H
Hu Tao 已提交
1245
    virBitmapPtr cpumap;
1246 1247
    int present;

E
Eric Blake 已提交
1248
    present = nodeGetCPUCount();
1249
    if (present < 0)
1250
        return NULL;
E
Eric Blake 已提交
1251 1252 1253 1254

    if (virFileExists(SYSFS_SYSTEM_PATH "/cpu/online")) {
        cpumap = linuxParseCPUmap(present, SYSFS_SYSTEM_PATH "/cpu/online");
    } else {
1255
        size_t i;
E
Eric Blake 已提交
1256 1257

        cpumap = virBitmapNew(present);
1258
        if (!cpumap)
E
Eric Blake 已提交
1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
            return NULL;
        for (i = 0; i < present; i++) {
            int online = virNodeGetCpuValue(SYSFS_SYSTEM_PATH, i, "online", 1);
            if (online < 0) {
                virBitmapFree(cpumap);
                return NULL;
            }
            if (online)
                ignore_value(virBitmapSetBit(cpumap, i));
        }
    }
1270 1271
    if (max_id && cpumap)
        *max_id = present;
1272 1273
    return cpumap;
#else
1274 1275
    virReportError(VIR_ERR_NO_SUPPORT, "%s",
                   _("node cpumap not implemented on this platform"));
1276 1277 1278 1279
    return NULL;
#endif
}

1280
#ifdef __linux__
1281
static int
1282
nodeSetMemoryParameterValue(virTypedParameterPtr param)
1283 1284 1285 1286 1287 1288
{
    char *path = NULL;
    char *strval = NULL;
    int ret = -1;
    int rc = -1;

1289
    char *field = strchr(param->field, '_');
1290
    sa_assert(field);
1291
    field++;
1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303
    if (virAsprintf(&path, "%s/%s",
                    SYSFS_MEMORY_SHARED_PATH, field) < 0) {
        ret = -2;
        goto cleanup;
    }

    if (virAsprintf(&strval, "%u", param->value.ui) == -1) {
        ret = -2;
        goto cleanup;
    }

    if ((rc = virFileWriteStr(path, strval, 0)) < 0) {
1304
        virReportSystemError(-rc, _("failed to set %s"), param->field);
1305 1306 1307 1308
        goto cleanup;
    }

    ret = 0;
1309
 cleanup:
1310 1311 1312 1313
    VIR_FREE(path);
    VIR_FREE(strval);
    return ret;
}
1314 1315 1316 1317 1318 1319

static bool
nodeMemoryParametersIsAllSupported(virTypedParameterPtr params,
                                   int nparams)
{
    char *path = NULL;
1320
    size_t i;
1321 1322 1323 1324 1325

    for (i = 0; i < nparams; i++) {
        virTypedParameterPtr param = &params[i];

        char *field = strchr(param->field, '_');
1326
        sa_assert(field);
1327 1328
        field++;
        if (virAsprintf(&path, "%s/%s",
1329
                        SYSFS_MEMORY_SHARED_PATH, field) < 0)
1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344
            return false;

        if (!virFileExists(path)) {
            virReportError(VIR_ERR_OPERATION_INVALID,
                           _("Parameter '%s' is not supported by "
                             "this kernel"), param->field);
            VIR_FREE(path);
            return false;
        }

        VIR_FREE(path);
    }

    return true;
}
1345
#endif
1346 1347

int
1348
nodeSetMemoryParameters(virTypedParameterPtr params ATTRIBUTE_UNUSED,
1349
                        int nparams ATTRIBUTE_UNUSED,
1350 1351 1352 1353 1354
                        unsigned int flags)
{
    virCheckFlags(0, -1);

#ifdef __linux__
1355
    size_t i;
1356
    int rc;
1357

1358 1359 1360 1361 1362 1363 1364 1365
    if (virTypedParamsValidate(params, nparams,
                               VIR_NODE_MEMORY_SHARED_PAGES_TO_SCAN,
                               VIR_TYPED_PARAM_UINT,
                               VIR_NODE_MEMORY_SHARED_SLEEP_MILLISECS,
                               VIR_TYPED_PARAM_UINT,
                               VIR_NODE_MEMORY_SHARED_MERGE_ACROSS_NODES,
                               VIR_TYPED_PARAM_UINT,
                               NULL) < 0)
1366 1367
        return -1;

1368 1369
    if (!nodeMemoryParametersIsAllSupported(params, nparams))
        return -1;
1370

1371 1372
    for (i = 0; i < nparams; i++) {
        rc = nodeSetMemoryParameterValue(&params[i]);
1373

1374 1375 1376
        /* Out of memory */
        if (rc == -2)
            return -1;
1377 1378
    }

1379
    return 0;
1380 1381 1382 1383 1384 1385 1386 1387
#else
    virReportError(VIR_ERR_NO_SUPPORT, "%s",
                   _("node set memory parameters not implemented"
                     " on this platform"));
    return -1;
#endif
}

1388
#ifdef __linux__
1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399
static int
nodeGetMemoryParameterValue(const char *field,
                            void *value)
{
    char *path = NULL;
    char *buf = NULL;
    char *tmp = NULL;
    int ret = -1;
    int rc = -1;

    if (virAsprintf(&path, "%s/%s",
1400
                    SYSFS_MEMORY_SHARED_PATH, field) < 0)
1401 1402
        goto cleanup;

1403 1404 1405 1406 1407
    if (!virFileExists(path)) {
        ret = -2;
        goto cleanup;
    }

1408 1409 1410 1411 1412 1413
    if (virFileReadAll(path, 1024, &buf) < 0)
        goto cleanup;

    if ((tmp = strchr(buf, '\n')))
        *tmp = '\0';

1414 1415 1416
    if (STREQ(field, "pages_to_scan")   ||
        STREQ(field, "sleep_millisecs") ||
        STREQ(field, "merge_across_nodes"))
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431
        rc = virStrToLong_ui(buf, NULL, 10, (unsigned int *)value);
    else if (STREQ(field, "pages_shared")    ||
             STREQ(field, "pages_sharing")   ||
             STREQ(field, "pages_unshared")  ||
             STREQ(field, "pages_volatile")  ||
             STREQ(field, "full_scans"))
        rc = virStrToLong_ull(buf, NULL, 10, (unsigned long long *)value);

    if (rc < 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("failed to parse %s"), field);
        goto cleanup;
    }

    ret = 0;
1432
 cleanup:
1433 1434 1435 1436
    VIR_FREE(path);
    VIR_FREE(buf);
    return ret;
}
1437
#endif
1438

1439
#define NODE_MEMORY_PARAMETERS_NUM 8
1440
int
1441
nodeGetMemoryParameters(virTypedParameterPtr params ATTRIBUTE_UNUSED,
1442
                        int *nparams ATTRIBUTE_UNUSED,
1443 1444 1445 1446 1447 1448 1449
                        unsigned int flags)
{
    virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);

#ifdef __linux__
    unsigned int pages_to_scan;
    unsigned int sleep_millisecs;
1450
    unsigned int merge_across_nodes;
1451 1452 1453 1454 1455
    unsigned long long pages_shared;
    unsigned long long pages_sharing;
    unsigned long long pages_unshared;
    unsigned long long pages_volatile;
    unsigned long long full_scans = 0;
1456
    size_t i;
1457
    int ret;
1458 1459 1460 1461 1462 1463 1464 1465 1466

    if ((*nparams) == 0) {
        *nparams = NODE_MEMORY_PARAMETERS_NUM;
        return 0;
    }

    for (i = 0; i < *nparams && i < NODE_MEMORY_PARAMETERS_NUM; i++) {
        virTypedParameterPtr param = &params[i];

1467
        switch (i) {
1468
        case 0:
1469 1470 1471 1472
            ret = nodeGetMemoryParameterValue("pages_to_scan", &pages_to_scan);
            if (ret == -2)
                continue;
            else if (ret == -1)
1473 1474 1475 1476 1477 1478 1479 1480 1481
                return -1;

            if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_TO_SCAN,
                                        VIR_TYPED_PARAM_UINT, pages_to_scan) < 0)
                return -1;

            break;

        case 1:
1482 1483 1484 1485
            ret = nodeGetMemoryParameterValue("sleep_millisecs", &sleep_millisecs);
            if (ret == -2)
                continue;
            else if (ret == -1)
1486 1487 1488 1489 1490 1491 1492 1493 1494
                return -1;

            if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_SLEEP_MILLISECS,
                                        VIR_TYPED_PARAM_UINT, sleep_millisecs) < 0)
                return -1;

            break;

        case 2:
1495 1496 1497 1498
            ret = nodeGetMemoryParameterValue("pages_shared", &pages_shared);
            if (ret == -2)
                continue;
            else if (ret == -1)
1499 1500 1501 1502 1503 1504 1505 1506 1507
                return -1;

            if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_SHARED,
                                        VIR_TYPED_PARAM_ULLONG, pages_shared) < 0)
                return -1;

            break;

        case 3:
1508 1509 1510 1511
            ret = nodeGetMemoryParameterValue("pages_sharing", &pages_sharing);
            if (ret == -2)
                continue;
            else if (ret == -1)
1512 1513 1514 1515 1516 1517 1518 1519 1520
                return -1;

            if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_SHARING,
                                        VIR_TYPED_PARAM_ULLONG, pages_sharing) < 0)
                return -1;

            break;

        case 4:
1521 1522 1523 1524
            ret = nodeGetMemoryParameterValue("pages_unshared", &pages_unshared);
            if (ret == -2)
                continue;
            else if (ret == -1)
1525 1526 1527 1528 1529 1530 1531 1532 1533
                return -1;

            if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_UNSHARED,
                                        VIR_TYPED_PARAM_ULLONG, pages_unshared) < 0)
                return -1;

            break;

        case 5:
1534 1535 1536 1537
            ret = nodeGetMemoryParameterValue("pages_volatile", &pages_volatile);
            if (ret == -2)
                continue;
            else if (ret == -1)
1538 1539 1540 1541 1542 1543 1544 1545 1546
                return -1;

            if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_VOLATILE,
                                        VIR_TYPED_PARAM_ULLONG, pages_volatile) < 0)
                return -1;

            break;

        case 6:
1547 1548 1549 1550
            ret = nodeGetMemoryParameterValue("full_scans", &full_scans);
            if (ret == -2)
                continue;
            else if (ret == -1)
1551 1552 1553 1554 1555 1556 1557 1558
                return -1;

            if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_FULL_SCANS,
                                        VIR_TYPED_PARAM_ULLONG, full_scans) < 0)
                return -1;

            break;

1559
        case 7:
1560 1561 1562 1563
            ret = nodeGetMemoryParameterValue("merge_across_nodes", &merge_across_nodes);
            if (ret == -2)
                continue;
            else if (ret == -1)
1564 1565 1566 1567 1568 1569 1570
                return -1;

            if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_MERGE_ACROSS_NODES,
                                        VIR_TYPED_PARAM_UINT, merge_across_nodes) < 0)
                return -1;

            break;
1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582
        }
    }

    return 0;
#else
    virReportError(VIR_ERR_NO_SUPPORT, "%s",
                   _("node get memory parameters not implemented"
                     " on this platform"));
    return -1;
#endif
}

1583
int
1584
nodeGetCPUMap(unsigned char **cpumap,
1585 1586
              unsigned int *online,
              unsigned int flags)
1587 1588 1589 1590 1591 1592 1593 1594
{
    virBitmapPtr cpus = NULL;
    int maxpresent;
    int ret = -1;
    int dummy;

    virCheckFlags(0, -1);

1595 1596 1597
    if (!cpumap && !online)
        return nodeGetCPUCount();

1598
    if (!(cpus = nodeGetCPUBitmap(&maxpresent)))
1599 1600 1601 1602 1603 1604 1605 1606
        goto cleanup;

    if (cpumap && virBitmapToData(cpus, cpumap, &dummy) < 0)
        goto cleanup;
    if (online)
        *online = virBitmapCountBits(cpus);

    ret = maxpresent;
1607
 cleanup:
1608 1609 1610 1611 1612 1613
    if (ret < 0 && cpumap)
        VIR_FREE(*cpumap);
    virBitmapFree(cpus);
    return ret;
}

1614 1615 1616 1617 1618 1619 1620 1621 1622
static int
nodeCapsInitNUMAFake(virCapsPtr caps ATTRIBUTE_UNUSED)
{
    virNodeInfo nodeinfo;
    virCapsHostNUMACellCPUPtr cpus;
    int ncpus;
    int s, c, t;
    int id;

1623
    if (nodeGetInfo(&nodeinfo) < 0)
1624 1625 1626 1627
        return -1;

    ncpus = VIR_NODEINFO_MAXCPUS(nodeinfo);

1628
    if (VIR_ALLOC_N(cpus, ncpus) < 0)
1629 1630 1631
        return -1;

    id = 0;
1632 1633 1634
    for (s = 0; s < nodeinfo.sockets; s++) {
        for (c = 0; c < nodeinfo.cores; c++) {
            for (t = 0; t < nodeinfo.threads; t++) {
1635 1636 1637 1638 1639
                cpus[id].id = id;
                cpus[id].socket_id = s;
                cpus[id].core_id = c;
                if (!(cpus[id].siblings = virBitmapNew(ncpus)))
                    goto error;
1640
                ignore_value(virBitmapSetBit(cpus[id].siblings, id));
1641 1642 1643 1644 1645 1646 1647
                id++;
            }
        }
    }

    if (virCapabilitiesAddHostNUMACell(caps, 0,
                                       nodeinfo.memory,
1648
                                       ncpus, cpus,
M
Michal Privoznik 已提交
1649
                                       0, NULL,
1650
                                       0, NULL) < 0)
1651 1652 1653 1654 1655
        goto error;

    return 0;

 error:
1656
    for (; id >= 0; id--)
1657 1658 1659 1660 1661 1662
        virBitmapFree(cpus[id].siblings);
    VIR_FREE(cpus);
    return -1;
}

static int
1663
nodeGetCellsFreeMemoryFake(unsigned long long *freeMems,
1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686
                           int startCell,
                           int maxCells ATTRIBUTE_UNUSED)
{
    double avail = physmem_available();

    if (startCell != 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("start cell %d out of range (0-%d)"),
                       startCell, 0);
        return -1;
    }

    freeMems[0] = (unsigned long long)avail;

    if (!freeMems[0]) {
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                       _("Cannot determine free memory"));
        return -1;
    }

    return 1;
}

1687 1688 1689
static int
nodeGetMemoryFake(unsigned long long *mem,
                  unsigned long long *freeMem)
1690
{
1691 1692
    int ret = -1;

W
Wojciech Macek 已提交
1693 1694 1695 1696 1697
#if defined(__FreeBSD__)
    unsigned long pagesize = getpagesize();
    u_int value;
    size_t value_size = sizeof(value);

1698 1699 1700 1701 1702 1703 1704 1705
    if (mem) {
        if (sysctlbyname("vm.stats.vm.v_page_count", &value,
                         &value_size, NULL, 0) < 0) {
            virReportSystemError(errno, "%s",
                                 _("sysctl failed for vm.stats.vm.v_page_count"));
            goto cleanup;
        }
        *mem = value * (unsigned long long)pagesize;
W
Wojciech Macek 已提交
1706 1707
    }

1708 1709 1710 1711 1712 1713 1714 1715 1716 1717
    if (freeMem) {
        if (sysctlbyname("vm.stats.vm.v_free_count", &value,
                         &value_size, NULL, 0) < 0) {
            virReportSystemError(errno, "%s",
                                 _("sysctl failed for vm.stats.vm.v_free_count"));
            goto cleanup;
        }

        *freeMem = value * (unsigned long long)pagesize;
    }
W
Wojciech Macek 已提交
1718 1719

#else
1720 1721 1722 1723 1724 1725 1726
    if (mem) {
        double total = physmem_total();
        if (!total) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("Cannot determine free memory"));
            goto cleanup;
        }
1727

1728
        *mem = (unsigned long long) total;
1729 1730
    }

1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741
    if (freeMem) {
        double avail = physmem_available();

        if (!avail) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("Cannot determine free memory"));
            goto cleanup;
        }

        *freeMem = (unsigned long long) avail;
    }
W
Wojciech Macek 已提交
1742
#endif
1743 1744 1745 1746

    ret = 0;
 cleanup:
    return ret;
1747 1748
}

1749 1750
/* returns 1 on success, 0 if the detection failed and -1 on hard error */
static int
E
Eric Blake 已提交
1751 1752
virNodeCapsFillCPUInfo(int cpu_id ATTRIBUTE_UNUSED,
                       virCapsHostNUMACellCPUPtr cpu ATTRIBUTE_UNUSED)
1753
{
E
Eric Blake 已提交
1754
#ifdef __linux__
1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773
    int tmp;
    cpu->id = cpu_id;

    if ((tmp = virNodeGetCpuValue(SYSFS_CPU_PATH, cpu_id,
                                  "topology/physical_package_id", -1)) < 0)
        return 0;

    cpu->socket_id = tmp;

    if ((tmp = virNodeGetCpuValue(SYSFS_CPU_PATH, cpu_id,
                                  "topology/core_id", -1)) < 0)
        return 0;

    cpu->core_id = tmp;

    if (!(cpu->siblings = virNodeGetSiblingsList(SYSFS_CPU_PATH, cpu_id)))
        return -1;

    return 0;
E
Eric Blake 已提交
1774 1775 1776 1777 1778
#else
    virReportError(VIR_ERR_NO_SUPPORT, "%s",
                   _("node cpu info not implemented on this platform"));
    return -1;
#endif
1779 1780
}

1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827
static int
virNodeCapsGetSiblingInfo(int node,
                          virCapsHostNUMACellSiblingInfoPtr *siblings,
                          int *nsiblings)
{
    virCapsHostNUMACellSiblingInfoPtr tmp = NULL;
    int tmp_size = 0;
    int ret = -1;
    int *distances = NULL;
    int ndistances = 0;
    size_t i;

    if (virNumaGetDistances(node, &distances, &ndistances) < 0)
        goto cleanup;

    if (!distances) {
        *siblings = NULL;
        *nsiblings = 0;
        return 0;
    }

    if (VIR_ALLOC_N(tmp, ndistances) < 0)
        goto cleanup;

    for (i = 0; i < ndistances; i++) {
        if (!distances[i])
            continue;

        tmp[tmp_size].node = i;
        tmp[tmp_size].distance = distances[i];
        tmp_size++;
    }

    if (VIR_REALLOC_N(tmp, tmp_size) < 0)
        goto cleanup;

    *siblings = tmp;
    *nsiblings = tmp_size;
    tmp = NULL;
    tmp_size = 0;
    ret = 0;
 cleanup:
    VIR_FREE(distances);
    VIR_FREE(tmp);
    return ret;
}

M
Michal Privoznik 已提交
1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856
static int
virNodeCapsGetPagesInfo(int node,
                        virCapsHostNUMACellPageInfoPtr *pageinfo,
                        int *npageinfo)
{
    int ret = -1;
    unsigned int *pages_size = NULL, *pages_avail = NULL;
    size_t npages, i;

    if (virNumaGetPages(node, &pages_size, &pages_avail, NULL, &npages) < 0)
        goto cleanup;

    if (VIR_ALLOC_N(*pageinfo, npages) < 0)
        goto cleanup;
    *npageinfo = npages;

    for (i = 0; i < npages; i++) {
        (*pageinfo)[i].size = pages_size[i];
        (*pageinfo)[i].avail = pages_avail[i];
    }

    ret = 0;

 cleanup:
    VIR_FREE(pages_avail);
    VIR_FREE(pages_size);
    return ret;
}

1857
int
1858
nodeCapsInitNUMA(virCapsPtr caps)
1859 1860
{
    int n;
1861
    unsigned long long memory;
1862
    virCapsHostNUMACellCPUPtr cpus = NULL;
1863
    virBitmapPtr cpumap = NULL;
1864
    virCapsHostNUMACellSiblingInfoPtr siblings = NULL;
1865
    int nsiblings = 0;
M
Michal Privoznik 已提交
1866 1867
    virCapsHostNUMACellPageInfoPtr pageinfo = NULL;
    int npageinfo;
1868
    int ret = -1;
1869
    int ncpus = 0;
1870
    int cpu;
1871
    bool topology_failed = false;
1872
    int max_node;
1873

1874
    if (!virNumaIsAvailable())
1875
        return nodeCapsInitNUMAFake(caps);
1876

1877 1878 1879 1880
    if ((max_node = virNumaGetMaxNode()) < 0)
        goto cleanup;

    for (n = 0; n <= max_node; n++) {
1881
        size_t i;
1882

1883 1884 1885
        if ((ncpus = virNumaGetNodeCPUs(n, &cpumap)) < 0) {
            if (ncpus == -2)
                continue;
1886

1887 1888
            goto cleanup;
        }
1889 1890 1891

        if (VIR_ALLOC_N(cpus, ncpus) < 0)
            goto cleanup;
1892
        cpu = 0;
1893

1894 1895 1896 1897 1898 1899 1900
        for (i = 0; i < virBitmapSize(cpumap); i++) {
            bool cpustate;
            if (virBitmapGetBit(cpumap, i, &cpustate) < 0)
                continue;

            if (cpustate) {
                if (virNodeCapsFillCPUInfo(i, cpus + cpu++) < 0) {
1901 1902 1903 1904 1905
                    topology_failed = true;
                    virResetLastError();
                }
            }
        }
1906

1907 1908 1909
        if (virNodeCapsGetSiblingInfo(n, &siblings, &nsiblings) < 0)
            goto cleanup;

M
Michal Privoznik 已提交
1910 1911 1912
        if (virNodeCapsGetPagesInfo(n, &pageinfo, &npageinfo) < 0)
            goto cleanup;

1913 1914 1915 1916
        /* Detect the amount of memory in the numa cell in KiB */
        virNumaGetNodeMemory(n, &memory, NULL);
        memory >>= 10;

1917 1918
        if (virCapabilitiesAddHostNUMACell(caps, n, memory,
                                           ncpus, cpus,
M
Michal Privoznik 已提交
1919 1920
                                           nsiblings, siblings,
                                           npageinfo, pageinfo) < 0)
1921
            goto cleanup;
1922 1923

        cpus = NULL;
1924
        siblings = NULL;
M
Michal Privoznik 已提交
1925
        pageinfo = NULL;
1926 1927 1928 1929
    }

    ret = 0;

1930
 cleanup:
1931 1932 1933
    if (topology_failed || ret < 0)
        virCapabilitiesClearHostNUMACellCPUTopology(cpus, ncpus);

1934 1935
    virBitmapFree(cpumap);
    VIR_FREE(cpus);
1936
    VIR_FREE(siblings);
M
Michal Privoznik 已提交
1937
    VIR_FREE(pageinfo);
1938

1939 1940 1941
    if (ret < 0)
        VIR_FREE(cpus);

1942 1943
    return ret;
}
1944 1945 1946


int
1947
nodeGetCellsFreeMemory(unsigned long long *freeMems,
1948 1949 1950
                       int startCell,
                       int maxCells)
{
1951
    unsigned long long mem;
1952 1953 1954 1955
    int n, lastCell, numCells;
    int ret = -1;
    int maxCell;

1956
    if (!virNumaIsAvailable())
1957
        return nodeGetCellsFreeMemoryFake(freeMems,
1958 1959
                                          startCell, maxCells);

1960 1961 1962
    if ((maxCell = virNumaGetMaxNode()) < 0)
        return 0;

1963
    if (startCell > maxCell) {
1964 1965 1966
        virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("start cell %d out of range (0-%d)"),
                       startCell, maxCell);
1967 1968 1969 1970 1971 1972
        goto cleanup;
    }
    lastCell = startCell + maxCells - 1;
    if (lastCell > maxCell)
        lastCell = maxCell;

1973
    for (numCells = 0, n = startCell; n <= lastCell; n++) {
1974
        virNumaGetNodeMemory(n, NULL, &mem);
1975

1976 1977 1978 1979
        freeMems[numCells++] = mem;
    }
    ret = numCells;

1980
 cleanup:
1981 1982 1983
    return ret;
}

1984 1985 1986
int
nodeGetMemory(unsigned long long *mem,
              unsigned long long *freeMem)
1987
{
1988
    int max_node;
1989 1990
    int n;

1991 1992 1993 1994 1995 1996
    if (mem)
        *mem = 0;

    if (freeMem)
        *freeMem = 0;

1997
    if (!virNumaIsAvailable())
1998
        return nodeGetMemoryFake(mem, freeMem);
1999

2000
    if ((max_node = virNumaGetMaxNode()) < 0)
2001
        return -1;
2002

2003
    for (n = 0; n <= max_node; n++) {
2004 2005 2006 2007 2008 2009 2010
        unsigned long long tmp_mem = 0, tmp_freeMem = 0;

        if (!virNumaNodeIsAvailable(n))
            continue;

        if (virNumaGetNodeMemory(n, &tmp_mem, &tmp_freeMem) < 0)
            return -1;
2011

2012 2013 2014 2015 2016
        if (mem)
            *mem += tmp_mem;

        if (freeMem)
            *freeMem += tmp_freeMem;
2017 2018
    }

2019
    return 0;
2020
}