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22bf5be3237cb482a2ffd772ffd20ce37285eebf
xen/tools/libxl/libxl.c
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Juergen Gross 1c2220db37 libxl: add max possible mfn to libxl_physinfo 
Add the maximum possible mfn of the host to the libxl_physinfo
data structure.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2017-09-28 11:07:24 +02:00

785 lines
20 KiB
C
Raw Blame History

/*
* Copyright 2009-2017 Citrix Ltd and other contributors
*
* This program 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; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program 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.
*/
#include "libxl_osdeps.h"
#include "libxl_internal.h"
int libxl_ctx_alloc(libxl_ctx **pctx, int version,
unsigned flags, xentoollog_logger * lg)
{
libxl_ctx *ctx = NULL;
libxl__gc gc_buf, *gc = NULL;
int rc;
if (version != LIBXL_VERSION) { rc = ERROR_VERSION; goto out; }
ctx = malloc(sizeof(*ctx));
if (!ctx) {
xtl_log(lg, XTL_ERROR, errno, "libxl",
"%s:%d:%s: Failed to allocate context\n",
__FILE__, __LINE__, __func__);
rc = ERROR_NOMEM; goto out;
}
memset(ctx, 0, sizeof(libxl_ctx));
ctx->lg = lg;
/* First initialise pointers etc. (cannot fail) */
ctx->nogc_gc.alloc_maxsize = -1;
ctx->nogc_gc.owner = ctx;
LIBXL_TAILQ_INIT(&ctx->occurred);
ctx->osevent_hooks = 0;
ctx->poller_app = 0;
LIBXL_LIST_INIT(&ctx->pollers_event);
LIBXL_LIST_INIT(&ctx->pollers_idle);
LIBXL_LIST_INIT(&ctx->pollers_fds_changed);
LIBXL_LIST_INIT(&ctx->efds);
LIBXL_TAILQ_INIT(&ctx->etimes);
ctx->watch_slots = 0;
LIBXL_SLIST_INIT(&ctx->watch_freeslots);
libxl__ev_fd_init(&ctx->watch_efd);
ctx->xce = 0;
LIBXL_LIST_INIT(&ctx->evtchns_waiting);
libxl__ev_fd_init(&ctx->evtchn_efd);
LIBXL_LIST_INIT(&ctx->aos_inprogress);
LIBXL_TAILQ_INIT(&ctx->death_list);
libxl__ev_xswatch_init(&ctx->death_watch);
ctx->childproc_hooks = &libxl__childproc_default_hooks;
ctx->childproc_user = 0;
ctx->sigchld_selfpipe[0] = -1;
ctx->sigchld_selfpipe[1] = -1;
libxl__ev_fd_init(&ctx->sigchld_selfpipe_efd);
/* The mutex is special because we can't idempotently destroy it */
if (libxl__init_recursive_mutex(ctx, &ctx->lock) < 0) {
LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "Failed to initialize mutex");
free(ctx);
ctx = 0;
rc = ERROR_FAIL;
goto out;
}
/* Now ctx is safe for ctx_free; failures simply set rc and "goto out" */
LIBXL_INIT_GC(gc_buf,ctx);
gc = &gc_buf;
/* Now gc is useable */
rc = libxl__atfork_init(ctx);
if (rc) goto out;
ctx->poller_app = libxl__poller_get(gc);
if (!ctx->poller_app) {
rc = ERROR_FAIL;
goto out;
}
ctx->xch = xc_interface_open(lg,lg,0);
if (!ctx->xch) {
LOGEV(ERROR, errno, "cannot open libxc handle");
rc = ERROR_FAIL; goto out;
}
ctx->xsh = xs_daemon_open();
if (!ctx->xsh)
ctx->xsh = xs_domain_open();
if (!ctx->xsh) {
LOGEV(ERROR, errno, "cannot connect to xenstore");
rc = ERROR_FAIL; goto out;
}
*pctx = ctx;
return 0;
out:
if (gc) libxl__free_all(gc);
libxl_ctx_free(ctx);
*pctx = NULL;
return rc;
}
static void free_disable_deaths(libxl__gc *gc,
struct libxl__evgen_domain_death_list *l) {
libxl_evgen_domain_death *death;
while ((death = LIBXL_TAILQ_FIRST(l)))
libxl__evdisable_domain_death(gc, death);
}
static void discard_events(struct libxl__event_list *l) {
/* doesn't bother unlinking from the list, so l is corrupt on return */
libxl_event *ev, *next;
LIBXL_TAILQ_FOREACH_SAFE(ev, l, link, next)
libxl_event_free(0, ev);
}
int libxl_ctx_free(libxl_ctx *ctx)
{
if (!ctx) return 0;
int i;
GC_INIT(ctx);
CTX_LOCK;
assert(!ctx->osevent_in_hook);
CTX->osevent_in_hook += 1000; /* make violations easier to debug */
/* Deregister all libxl__ev_KINDs: */
free_disable_deaths(gc, &CTX->death_list);
free_disable_deaths(gc, &CTX->death_reported);
libxl_evgen_disk_eject *eject;
while ((eject = LIBXL_LIST_FIRST(&CTX->disk_eject_evgens)))
libxl__evdisable_disk_eject(gc, eject);
libxl_childproc_setmode(CTX,0,0);
for (i = 0; i < ctx->watch_nslots; i++)
assert(!libxl__watch_slot_contents(gc, i));
assert(!libxl__ev_fd_isregistered(&ctx->watch_efd));
assert(!libxl__ev_fd_isregistered(&ctx->evtchn_efd));
assert(!libxl__ev_fd_isregistered(&ctx->sigchld_selfpipe_efd));
/* Now there should be no more events requested from the application: */
assert(LIBXL_LIST_EMPTY(&ctx->efds));
assert(LIBXL_TAILQ_EMPTY(&ctx->etimes));
assert(LIBXL_LIST_EMPTY(&ctx->evtchns_waiting));
assert(LIBXL_LIST_EMPTY(&ctx->aos_inprogress));
if (ctx->xch) xc_interface_close(ctx->xch);
libxl_version_info_dispose(&ctx->version_info);
if (ctx->xsh) xs_daemon_close(ctx->xsh);
if (ctx->xce) xenevtchn_close(ctx->xce);
libxl__poller_put(ctx, ctx->poller_app);
ctx->poller_app = NULL;
assert(LIBXL_LIST_EMPTY(&ctx->pollers_event));
assert(LIBXL_LIST_EMPTY(&ctx->pollers_fds_changed));
libxl__poller *poller, *poller_tmp;
LIBXL_LIST_FOREACH_SAFE(poller, &ctx->pollers_idle, entry, poller_tmp) {
libxl__poller_dispose(poller);
free(poller);
}
free(ctx->watch_slots);
discard_events(&ctx->occurred);
/* If we have outstanding children, then the application inherits
* them; we wish the application good luck with understanding
* this if and when it reaps them. */
libxl__sigchld_notneeded(gc);
libxl__pipe_close(ctx->sigchld_selfpipe);
CTX_UNLOCK;
pthread_mutex_destroy(&ctx->lock);
GC_FREE;
free(ctx);
return 0;
}
void libxl_string_list_dispose(libxl_string_list *psl)
{
int i;
libxl_string_list sl = *psl;
if (!sl)
return;
for (i = 0; sl[i] != NULL; i++) {
free(sl[i]);
sl[i] = NULL;
}
free(sl);
*psl = NULL;
}
void libxl_string_list_copy(libxl_ctx *ctx,
libxl_string_list *dst,
const libxl_string_list *src)
{
GC_INIT(ctx);
int i, len;
if (!*src) {
*dst = NULL;
goto out;
}
len = libxl_string_list_length(src);
/* one extra slot for sentinel */
*dst = libxl__calloc(NOGC, len + 1, sizeof(char *));
for (i = 0; i < len; i++)
(*dst)[i] = libxl__strdup(NOGC, (*src)[i]);
out:
GC_FREE;
}
int libxl_string_list_length(const libxl_string_list *psl)
{
int i = 0;
if (*psl)
while ((*psl)[i])
i++;
return i;
}
int libxl_key_value_list_length(const libxl_key_value_list *pkvl)
{
int i = 0;
libxl_key_value_list kvl = *pkvl;
if (kvl) {
while (kvl[2 * i]) /* Only checks keys */
i++;
}
return i;
}
void libxl_key_value_list_dispose(libxl_key_value_list *pkvl)
{
int i;
libxl_key_value_list kvl = *pkvl;
if (!kvl)
return;
for (i = 0; kvl[i] != NULL; i += 2) {
free(kvl[i]);
kvl[i] = NULL;
if (kvl[i + 1]) {
free(kvl[i + 1]);
kvl[i+1] = NULL;
}
}
free(kvl);
*pkvl = NULL;
}
void libxl_key_value_list_copy(libxl_ctx *ctx,
libxl_key_value_list *dst,
const libxl_key_value_list *src)
{
GC_INIT(ctx);
int i, len;
if (*src == NULL) {
*dst = NULL;
goto out;
}
len = libxl_key_value_list_length(src);
/* one extra slot for sentinel */
*dst = libxl__calloc(NOGC, len * 2 + 1, sizeof(char *));
for (i = 0; i < len * 2; i += 2) {
(*dst)[i] = libxl__strdup(NOGC, (*src)[i]);
if ((*src)[i+1])
(*dst)[i+1] = libxl__strdup(NOGC, (*src)[i+1]);
else
(*dst)[i+1] = NULL;
}
out:
GC_FREE;
}
void libxl_defbool_set(libxl_defbool *db, bool b)
{
db->val = b ? LIBXL__DEFBOOL_TRUE : LIBXL__DEFBOOL_FALSE;
}
void libxl_defbool_unset(libxl_defbool *db)
{
db->val = LIBXL__DEFBOOL_DEFAULT;
}
bool libxl_defbool_is_default(libxl_defbool db)
{
return !db.val;
}
void libxl_defbool_setdefault(libxl_defbool *db, bool b)
{
if (libxl_defbool_is_default(*db))
libxl_defbool_set(db, b);
}
bool libxl_defbool_val(libxl_defbool db)
{
assert(!libxl_defbool_is_default(db));
return db.val > 0;
}
const char *libxl_defbool_to_string(libxl_defbool b)
{
if (b.val < 0)
return LIBXL__DEFBOOL_STR_FALSE;
else if (b.val > 0)
return LIBXL__DEFBOOL_STR_TRUE;
else
return LIBXL__DEFBOOL_STR_DEFAULT;
}
/******************************************************************************/
int libxl_get_physinfo(libxl_ctx *ctx, libxl_physinfo *physinfo)
{
xc_physinfo_t xcphysinfo = { 0 };
int rc;
long l;
GC_INIT(ctx);
rc = xc_physinfo(ctx->xch, &xcphysinfo);
if (rc != 0) {
LOGE(ERROR, "getting physinfo");
GC_FREE;
return ERROR_FAIL;
}
physinfo->threads_per_core = xcphysinfo.threads_per_core;
physinfo->cores_per_socket = xcphysinfo.cores_per_socket;
physinfo->max_cpu_id = xcphysinfo.max_cpu_id;
physinfo->nr_cpus = xcphysinfo.nr_cpus;
physinfo->cpu_khz = xcphysinfo.cpu_khz;
physinfo->total_pages = xcphysinfo.total_pages;
physinfo->free_pages = xcphysinfo.free_pages;
physinfo->scrub_pages = xcphysinfo.scrub_pages;
physinfo->outstanding_pages = xcphysinfo.outstanding_pages;
physinfo->max_possible_mfn = xcphysinfo.max_mfn;
l = xc_sharing_freed_pages(ctx->xch);
if (l < 0 && errno == ENOSYS) {
l = 0;
} else if (l < 0) {
LOGEV(ERROR, l, "getting sharing freed pages");
GC_FREE;
return ERROR_FAIL;
}
physinfo->sharing_freed_pages = l;
l = xc_sharing_used_frames(ctx->xch);
if (l < 0 && errno == ENOSYS) {
l = 0;
} else if (l < 0) {
LOGEV(ERROR, l, "getting sharing used frames");
GC_FREE;
return ERROR_FAIL;
}
physinfo->sharing_used_frames = l;
physinfo->nr_nodes = xcphysinfo.nr_nodes;
memcpy(physinfo->hw_cap,xcphysinfo.hw_cap, sizeof(physinfo->hw_cap));
physinfo->cap_hvm = !!(xcphysinfo.capabilities & XEN_SYSCTL_PHYSCAP_hvm);
physinfo->cap_hvm_directio =
!!(xcphysinfo.capabilities & XEN_SYSCTL_PHYSCAP_hvm_directio);
GC_FREE;
return 0;
}
libxl_cputopology *libxl_get_cpu_topology(libxl_ctx *ctx, int *nb_cpu_out)
{
GC_INIT(ctx);
xc_cputopo_t *cputopo;
libxl_cputopology *ret = NULL;
int i;
unsigned num_cpus = 0;
/* Setting buffer to NULL makes the call return number of CPUs */
if (xc_cputopoinfo(ctx->xch, &num_cpus, NULL))
{
LOGE(ERROR, "Unable to determine number of CPUS");
goto out;
}
cputopo = libxl__zalloc(gc, sizeof(*cputopo) * num_cpus);
if (xc_cputopoinfo(ctx->xch, &num_cpus, cputopo)) {
LOGE(ERROR, "CPU topology info hypercall failed");
goto out;
}
ret = libxl__zalloc(NOGC, sizeof(libxl_cputopology) * num_cpus);
for (i = 0; i < num_cpus; i++) {
#define V(map, i, invalid) ( cputopo[i].map == invalid) ? \
LIBXL_CPUTOPOLOGY_INVALID_ENTRY : cputopo[i].map
ret[i].core = V(core, i, XEN_INVALID_CORE_ID);
ret[i].socket = V(socket, i, XEN_INVALID_SOCKET_ID);
ret[i].node = V(node, i, XEN_INVALID_NODE_ID);
#undef V
}
*nb_cpu_out = num_cpus;
out:
GC_FREE;
return ret;
}
libxl_pcitopology *libxl_get_pci_topology(libxl_ctx *ctx, int *num_devs)
{
GC_INIT(ctx);
physdev_pci_device_t *devs;
uint32_t *nodes;
libxl_pcitopology *ret = NULL;
int i, rc;
*num_devs = libxl__pci_numdevs(gc);
if (*num_devs < 0) {
LOG(ERROR, "Unable to determine number of PCI devices, rc %d",
*num_devs);
goto out;
}
devs = libxl__zalloc(gc, sizeof(*devs) * *num_devs);
nodes = libxl__zalloc(gc, sizeof(*nodes) * *num_devs);
rc = libxl__pci_topology_init(gc, devs, *num_devs);
if (rc) {
LOG(ERROR, "Cannot initialize PCI hypercall structure, rc %d", rc);
goto out;
}
if (xc_pcitopoinfo(ctx->xch, *num_devs, devs, nodes) != 0) {
LOGE(ERROR, "PCI topology info hypercall failed");
goto out;
}
ret = libxl__zalloc(NOGC, sizeof(libxl_pcitopology) * *num_devs);
for (i = 0; i < *num_devs; i++) {
ret[i].seg = devs[i].seg;
ret[i].bus = devs[i].bus;
ret[i].devfn = devs[i].devfn;
ret[i].node = ((nodes[i] == XEN_INVALID_NODE_ID) ||
(nodes[i] == XEN_INVALID_DEV)) ?
LIBXL_PCITOPOLOGY_INVALID_ENTRY : nodes[i];
}
out:
GC_FREE;
return ret;
}
libxl_numainfo *libxl_get_numainfo(libxl_ctx *ctx, int *nr)
{
GC_INIT(ctx);
xc_meminfo_t *meminfo;
uint32_t *distance;
libxl_numainfo *ret = NULL;
int i, j;
unsigned num_nodes = 0;
if (xc_numainfo(ctx->xch, &num_nodes, NULL, NULL)) {
LOGE(ERROR, "Unable to determine number of nodes");
goto out;
}
meminfo = libxl__zalloc(gc, sizeof(*meminfo) * num_nodes);
distance = libxl__zalloc(gc, sizeof(*distance) * num_nodes * num_nodes);
if (xc_numainfo(ctx->xch, &num_nodes, meminfo, distance)) {
LOGE(ERROR, "getting numainfo");
goto out;
}
*nr = num_nodes;
ret = libxl__zalloc(NOGC, sizeof(libxl_numainfo) * num_nodes);
for (i = 0; i < num_nodes; i++)
ret[i].dists = libxl__calloc(NOGC, num_nodes, sizeof(*distance));
for (i = 0; i < num_nodes; i++) {
#define V(val, invalid) (val == invalid) ? \
LIBXL_NUMAINFO_INVALID_ENTRY : val
ret[i].size = V(meminfo[i].memsize, XEN_INVALID_MEM_SZ);
ret[i].free = V(meminfo[i].memfree, XEN_INVALID_MEM_SZ);
ret[i].num_dists = num_nodes;
for (j = 0; j < ret[i].num_dists; j++) {
unsigned idx = i * num_nodes + j;
ret[i].dists[j] = V(distance[idx], XEN_INVALID_NODE_DIST);
}
#undef V
}
out:
GC_FREE;
return ret;
}
static int libxl__xc_version_wrap(libxl__gc *gc, libxl_version_info *info,
xen_build_id_t *build)
{
int r;
r = xc_version(CTX->xch, XENVER_build_id, build);
switch (r) {
case -EPERM:
case -ENODATA:
case 0:
info->build_id = libxl__strdup(NOGC, "");
break;
case -ENOBUFS:
break;
default:
if (r > 0) {
unsigned int i;
info->build_id = libxl__zalloc(NOGC, (r * 2) + 1);
for (i = 0; i < r ; i++)
snprintf(&info->build_id[i * 2], 3, "%02hhx", build->buf[i]);
r = 0;
}
break;
}
return r;
}
const libxl_version_info* libxl_get_version_info(libxl_ctx *ctx)
{
GC_INIT(ctx);
union {
xen_extraversion_t xen_extra;
xen_compile_info_t xen_cc;
xen_changeset_info_t xen_chgset;
xen_capabilities_info_t xen_caps;
xen_platform_parameters_t p_parms;
xen_commandline_t xen_commandline;
xen_build_id_t build_id;
} u;
long xen_version;
int r;
libxl_version_info *info = &ctx->version_info;
if (info->xen_version_extra != NULL)
goto out;
xen_version = xc_version(ctx->xch, XENVER_version, NULL);
info->xen_version_major = xen_version >> 16;
info->xen_version_minor = xen_version & 0xFF;
xc_version(ctx->xch, XENVER_extraversion, &u.xen_extra);
info->xen_version_extra = libxl__strdup(NOGC, u.xen_extra);
xc_version(ctx->xch, XENVER_compile_info, &u.xen_cc);
info->compiler = libxl__strdup(NOGC, u.xen_cc.compiler);
info->compile_by = libxl__strdup(NOGC, u.xen_cc.compile_by);
info->compile_domain = libxl__strdup(NOGC, u.xen_cc.compile_domain);
info->compile_date = libxl__strdup(NOGC, u.xen_cc.compile_date);
xc_version(ctx->xch, XENVER_capabilities, &u.xen_caps);
info->capabilities = libxl__strdup(NOGC, u.xen_caps);
xc_version(ctx->xch, XENVER_changeset, &u.xen_chgset);
info->changeset = libxl__strdup(NOGC, u.xen_chgset);
xc_version(ctx->xch, XENVER_platform_parameters, &u.p_parms);
info->virt_start = u.p_parms.virt_start;
info->pagesize = xc_version(ctx->xch, XENVER_pagesize, NULL);
xc_version(ctx->xch, XENVER_commandline, &u.xen_commandline);
info->commandline = libxl__strdup(NOGC, u.xen_commandline);
u.build_id.len = sizeof(u) - sizeof(u.build_id);
r = libxl__xc_version_wrap(gc, info, &u.build_id);
if (r == -ENOBUFS) {
xen_build_id_t *build_id;
build_id = libxl__zalloc(gc, info->pagesize);
build_id->len = info->pagesize - sizeof(*build_id);
r = libxl__xc_version_wrap(gc, info, build_id);
if (r) LOGEV(ERROR, r, "getting build_id");
}
out:
GC_FREE;
return info;
}
int libxl_send_sysrq(libxl_ctx *ctx, uint32_t domid, char sysrq)
{
GC_INIT(ctx);
char *dompath = libxl__xs_get_dompath(gc, domid);
libxl__xs_printf(gc, XBT_NULL, GCSPRINTF("%s/control/sysrq", dompath),
"%c", sysrq);
GC_FREE;
return 0;
}
int libxl_send_debug_keys(libxl_ctx *ctx, char *keys)
{
int ret;
GC_INIT(ctx);
ret = xc_send_debug_keys(ctx->xch, keys);
if ( ret < 0 ) {
LOGE(ERROR, "sending debug keys");
GC_FREE;
return ERROR_FAIL;
}
GC_FREE;
return 0;
}
int libxl_set_parameters(libxl_ctx *ctx, char *params)
{
int ret;
GC_INIT(ctx);
ret = xc_set_parameters(ctx->xch, params);
if (ret < 0) {
LOGEV(ERROR, ret, "setting parameters");
GC_FREE;
return ERROR_FAIL;
}
GC_FREE;
return 0;
}
static int fd_set_flags(libxl_ctx *ctx, int fd,
int fcntlgetop, int fcntlsetop, const char *fl,
int flagmask, int set_p)
{
int flags, r;
GC_INIT(ctx);
flags = fcntl(fd, fcntlgetop);
if (flags == -1) {
LOGE(ERROR, "fcntl(,F_GET%s) failed", fl);
GC_FREE;
return ERROR_FAIL;
}
if (set_p)
flags |= flagmask;
else
flags &= ~flagmask;
r = fcntl(fd, fcntlsetop, flags);
if (r == -1) {
LOGE(ERROR, "fcntl(,F_SET%s) failed", fl);
GC_FREE;
return ERROR_FAIL;
}
GC_FREE;
return 0;
}
int libxl_fd_set_cloexec(libxl_ctx *ctx, int fd, int cloexec)
{ return fd_set_flags(ctx,fd, F_GETFD,F_SETFD,"FD", FD_CLOEXEC, cloexec); }
int libxl_fd_set_nonblock(libxl_ctx *ctx, int fd, int nonblock)
{ return fd_set_flags(ctx,fd, F_GETFL,F_SETFL,"FL", O_NONBLOCK, nonblock); }
int libxl__fd_flags_modify_save(libxl__gc *gc, int fd,
int mask, int val, int *r_oldflags)
{
int rc, ret, fdfl;
fdfl = fcntl(fd, F_GETFL);
if (fdfl < 0) {
LOGE(ERROR, "failed to fcntl.F_GETFL for fd %d", fd);
rc = ERROR_FAIL;
goto out_err;
}
LOG(DEBUG, "fnctl F_GETFL flags for fd %d are 0x%x", fd, fdfl);
if (r_oldflags)
*r_oldflags = fdfl;
fdfl &= mask;
fdfl |= val;
LOG(DEBUG, "fnctl F_SETFL of fd %d to 0x%x", fd, fdfl);
ret = fcntl(fd, F_SETFL, fdfl);
if (ret < 0) {
LOGE(ERROR, "failed to fcntl.F_SETFL for fd %d", fd);
rc = ERROR_FAIL;
goto out_err;
}
rc = 0;
out_err:
return rc;
}
int libxl__fd_flags_restore(libxl__gc *gc, int fd, int fdfl)
{
int ret, rc;
LOG(DEBUG, "fnctl F_SETFL of fd %d to 0x%x", fd, fdfl);
ret = fcntl(fd, F_SETFL, fdfl);
if (ret < 0) {
LOGE(ERROR, "failed to fcntl.F_SETFL for fd %d", fd);
rc = ERROR_FAIL;
goto out_err;
}
rc = 0;
out_err:
return rc;
}
void libxl_hwcap_copy(libxl_ctx *ctx,libxl_hwcap *dst, const libxl_hwcap *src)
{
int i;
for (i = 0; i < 8; i++)
(*dst)[i] = (*src)[i];
}
void libxl_mac_copy(libxl_ctx *ctx, libxl_mac *dst, const libxl_mac *src)
{
int i;
for (i = 0; i < 6; i++)
(*dst)[i] = (*src)[i];
}
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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