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cgmanager-proxy.c
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/* cgmanager-proxy
*
* Copyright © 2013 Stephane Graber
* Author: Stephane Graber <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <frontend.h>
DBusConnection *server_conn;
bool master_running(void)
{
NihError *err;
/* is manager already running under cgmanager.lower */
server_conn = nih_dbus_connect(CGPROXY_DBUS_PATH, NULL);
if (server_conn) {
dbus_connection_unref (server_conn);
return true;
}
err = nih_error_get();
nih_free(err);
/* is manager running under cgmanager */
server_conn = nih_dbus_connect(CGMANAGER_DBUS_PATH, NULL);
if (server_conn) {
dbus_connection_unref (server_conn);
return true;
}
err = nih_error_get();
nih_free(err);
return false;
}
/* wait up to 2 seconds for a reply from cgmanager */
static int proxyrecv(int sockfd, void *buf, size_t len)
{
struct timeval tv;
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(sockfd, &rfds);
tv.tv_sec = 2;
tv.tv_usec = 0;
if (select(sockfd+1, &rfds, NULL, NULL, &tv) < 0)
return -1;
return recv(sockfd, buf, len, MSG_DONTWAIT);
}
static void cgm_dbus_disconnected(DBusConnection *connection);
int setup_proxy(void)
{
bool exists_upper = false, exists_lower = false;
NihError *err;
/* When running in container, /sys/fs/cgroup will have been
already mounted. But it may be ro */
if (is_ro_mount(CGDIR))
turn_mount_rw(CGDIR);
/*
* If /sys/fs/cgroup/cgmanager.lower exists,
* if /sys/fs/cgroup/cgmanager exists, then exit (proxy already running)
* start up, connect to .lower
* else
* if /sys/fs/cgroup/cgmanager exists, move it to /sys/fs/cgroup/cgmanager.lower
* start up and connect to .lower
*/
server_conn = nih_dbus_connect(CGMANAGER_DBUS_PATH, NULL);
if (server_conn) {
exists_upper = true;
dbus_connection_unref (server_conn);
} else {
err = nih_error_get();
nih_free(err);
}
server_conn = nih_dbus_connect(CGPROXY_DBUS_PATH, cgm_dbus_disconnected);
if (server_conn) {
exists_lower = true;
} else {
err = nih_error_get();
nih_free(err);
}
if (exists_upper && exists_lower) {
dbus_connection_unref (server_conn);
nih_fatal("proxy already running");
return -1; // proxy already running
}
if (exists_lower)
// we've got the sock we need, all set.
return 0;
if (exists_upper) {
//move /sys/fs/cgroup/cgmanager to /sys/fs/cgroup/cgmanager.lower
if (mkdir(CGPROXY_DIR, 0755) < 0 && errno != EEXIST) {
nih_fatal("failed to create lower sock");
return -1;
}
if (mount(CGMANAGER_DIR, CGPROXY_DIR, "none", MS_MOVE, 0) < 0) {
/* it wasn't a mount, meaning we are at the host
* level on an old kernel. So rename it */
if (unlink(CGPROXY_SOCK) && errno != ENOENT)
nih_warn("failed to remove %s: %s", CGPROXY_SOCK,
strerror(errno));
if (rmdir(CGPROXY_DIR) && errno != ENOENT)
nih_warn("failed to remove %s: %s", CGPROXY_DIR,
strerror(errno));
if (rename(CGMANAGER_DIR, CGPROXY_DIR) < 0) {
nih_fatal("unable to rename the socket");
return -1;
}
if (mkdir(CGMANAGER_DIR, 0755) < 0) {
nih_fatal("unable to create socket dir");
return -1;
}
}
}
server_conn = nih_dbus_connect(CGPROXY_DBUS_PATH, cgm_dbus_disconnected);
if (!server_conn) {
err = nih_error_get();
nih_fatal("Failed to open connection to %s: %s",
CGPROXY_DBUS_PATH, err->message);
nih_free(err);
return -1;
}
return 0;
}
static void cgm_dbus_disconnected(DBusConnection *connection)
{
NihError *err;
dbus_connection_unref(connection);
while (1) {
server_conn = nih_dbus_connect(CGPROXY_DBUS_PATH, cgm_dbus_disconnected);
if (server_conn)
return;
err = nih_error_get();
nih_error("Failed to re-open connection to %s: %s",
CGPROXY_DBUS_PATH, err->message);
nih_free(err);
nih_error("re-trying in 5 seconds\n");
sleep(5);
}
}
static int checkmaster = FALSE;
bool send_dummy_msg(DBusConnection *conn)
{
DBusMessage *message = NULL;
DBusMessageIter iter;
int a;
message = dbus_message_new_method_call(dbus_bus_get_unique_name(conn),
"/org/linuxcontainers/cgmanager",
"org.linuxcontainers.cgmanager0_0", "Ping");
if (!message) {
nih_error("%s: failed to create ping message", __func__);
return false;
}
dbus_message_set_no_reply(message, TRUE);
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_INT32, &a)) {
dbus_message_unref(message);
nih_error("%s: out of memory", __func__);
return false;
}
dbus_connection_send(conn, message, NULL);
dbus_connection_flush(conn);
dbus_message_unref(message);
return true;
}
static DBusMessage *start_dbus_request(const char *method, int *sv)
{
int optval = 1;
DBusMessage *msg = NULL;
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, sv) < 0) {
nih_error("%s: Error creating socketpair: %s",
__func__, strerror(errno));
return NULL;
}
if (setsockopt(sv[1], SOL_SOCKET, SO_PASSCRED, &optval, sizeof(optval)) == -1) {
nih_error("%s: setsockopt: %s", __func__, strerror(errno));
goto err;
}
if (setsockopt(sv[0], SOL_SOCKET, SO_PASSCRED, &optval, sizeof(optval)) == -1) {
nih_error("%s: setsockopt: %s", __func__, strerror(errno));
goto err;
}
msg = dbus_message_new_method_call(dbus_bus_get_unique_name(server_conn),
"/org/linuxcontainers/cgmanager",
"org.linuxcontainers.cgmanager0_0", method);
if (msg)
return msg;
err:
close(sv[0]);
close(sv[1]);
return NULL;
}
static bool complete_dbus_request(DBusMessage *message,
int *sv, struct ucred *rcred, struct ucred *vcred)
{
char buf[1];
if (!dbus_connection_send(server_conn, message, NULL)) {
nih_error("%s: failed to send dbus message", __func__);
dbus_message_unref(message);
return false;
}
dbus_connection_flush(server_conn);
dbus_message_unref(message);
if (proxyrecv(sv[0], buf, 1) != 1) {
nih_error("%s: Error getting reply from server over socketpair",
__func__);
return false;
}
if (send_creds(sv[0], rcred)) {
nih_error("%s: Error sending pid over SCM_CREDENTIAL",
__func__);
return false;
}
if (!vcred) // this request only requires one scm_credential
return true;
if (proxyrecv(sv[0], buf, 1) != 1) {
nih_error("%s: Error getting reply from server over socketpair",
__func__);
return false;
}
if (send_creds(sv[0], vcred)) {
nih_error("%s: Error sending pid over SCM_CREDENTIAL",
__func__);
return false;
}
return true;
}
int get_pid_cgroup_main (void *parent, char *controller,
struct ucred p, struct ucred r, struct ucred v, char **output)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char s[MAXPATHLEN] = { 0 };
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!(message = start_dbus_request("GetPidCgroupScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (!dbus_message_iter_append_basic (&iter,
DBUS_TYPE_STRING,
&controller)) {
dbus_message_unref(message);
nih_error("%s: out of memory", __func__);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
dbus_message_unref(message);
nih_error("%s: out of memory", __func__);
goto out;
}
if (!complete_dbus_request(message, sv, &r, &v)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], s, MAXPATHLEN-1) <= 0)
nih_error("%s: Error reading result from cgmanager",
__func__);
else {
*output = NIH_MUST( nih_strdup(parent, s) );
ret = 0;
}
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int get_pid_cgroup_abs_main (void *parent, char *controller,
struct ucred p, struct ucred r, struct ucred v, char **output)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char s[MAXPATHLEN] = { 0 };
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!(message = start_dbus_request("GetPidCgroupAbsScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (!dbus_message_iter_append_basic (&iter,
DBUS_TYPE_STRING,
&controller)) {
dbus_message_unref(message);
nih_error("%s: out of memory", __func__);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
dbus_message_unref(message);
nih_error("%s: out of memory", __func__);
goto out;
}
if (!complete_dbus_request(message, sv, &r, &v)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], s, MAXPATHLEN-1) <= 0)
nih_error("%s: Error reading result from cgmanager",
__func__);
else {
*output = NIH_MUST( nih_strdup(parent, s) );
ret = 0;
}
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int do_move_pid_main (const char *controller, const char *cgroup,
struct ucred p, struct ucred r, struct ucred v,
const char *cmd)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char buf[1];
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request(cmd, sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING,
&controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, &v)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], buf, 1) == 1 && *buf == '1')
ret = 0;
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int move_pid_main (const char *controller, const char *cgroup,
struct ucred p, struct ucred r, struct ucred v)
{
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (cgroup[0] == '/') {
nih_error("%s: uid %u tried to escape its cgroup", __func__, r.uid);
return -1;
}
return do_move_pid_main(controller, cgroup, p, r, v, "MovePidScm");
}
int move_pid_abs_main (const char *controller, const char *cgroup,
struct ucred p, struct ucred r, struct ucred v)
{
#if 0
/*
* We used to enforce that r must be root. However that's
* overly restrictive.
* Cgmanager ensures that r must have write access to the
* tasks file. That seems sufficient. However if it is deemed
* insufficient, we can ensure that r's user or group id own
* all parent directories up to a common parent, from v.cgroup
* to the requested cgroup. THIS CODE does NOT do that.
*/
if (r.uid) {
nih_error("%s: uid %u tried to escape", __func__, r.uid);
return -1;
}
#endif
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
return do_move_pid_main(controller, cgroup, p, r, v, "MovePidAbsScm");
}
int create_main (const char *controller, const char *cgroup, struct ucred p,
struct ucred r, int32_t *existed)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char buf[1];
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("CreateScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, NULL)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], buf, 1) == 1 && (*buf == '1' || *buf == '2'))
ret = 0;
*existed = *buf == '2' ? 1 : -1;
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int chown_main (const char *controller, const char *cgroup,
struct ucred p, struct ucred r, struct ucred v)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char buf[1];
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("ChownScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, &v)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], buf, 1) == 1 && *buf == '1')
ret = 0;
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int chmod_main (const char *controller, const char *cgroup, const char *file,
struct ucred p, struct ucred r, int mode)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char buf[1];
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("ChmodScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &file)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_INT32, &mode)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, NULL)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], buf, 1) == 1 && *buf == '1')
ret = 0;
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int get_value_main (void *parent, char *controller, const char *cgroup,
const char *key, struct ucred p, struct ucred r, char **value)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char output[MAXPATHLEN] = { 0 };
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("GetValueScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &key)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, NULL)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], output, MAXPATHLEN) <= 0) {
nih_error("%s: Failed reading string from cgmanager: %s",
__func__, strerror(errno));
} else {
*value = NIH_MUST( nih_strdup(parent, output) );
ret = 0;
}
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int set_value_main (char *controller, const char *cgroup,
const char *key, const char *value, struct ucred p,
struct ucred r)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char buf[1];
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("SetValueScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &key)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &value)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, NULL)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], buf, 1) == 1 && *buf == '1')
ret = 0;
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int remove_main (const char *controller, const char *cgroup, struct ucred p,
struct ucred r, int recursive, int32_t *existed)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
char buf[1];
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("RemoveScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_INT32, &recursive)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, NULL)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], buf, 1) == 1 && (*buf == '1' || *buf == '2'))
ret = 0;
*existed = *buf == '2' ? 1 : -1;
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int get_tasks_main (void *parent, char *controller, const char *cgroup,
struct ucred p, struct ucred r, int32_t **pids)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
uint32_t nrpids;
struct ucred tcred;
int i;
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("GetTasksScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, NULL)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], &nrpids, sizeof(uint32_t)) != sizeof(uint32_t))
goto out;
if (nrpids == -1) {
nih_error("%s: bad cgroup: %s:%s", __func__, controller, cgroup);
ret = -1;
goto out;
}
if (nrpids == 0) {
ret = 0;
goto out;
}
*pids = NIH_MUST( nih_alloc(parent, nrpids * sizeof(uint32_t)) );
for (i=0; i<nrpids; i++) {
get_scm_creds_sync(sv[0], &tcred);
if (tcred.pid == -1) {
nih_warn("%s: Failed getting pid from server",
__func__);
goto out;
}
(*pids)[i] = tcred.pid;
}
ret = nrpids;
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int get_tasks_recursive_main (void *parent, const char *controller,
const char *cgroup, struct ucred p, struct ucred r,
int32_t **pids)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
uint32_t nrpids;
struct ucred tcred;
int i;
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("GetTasksRecursiveScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_UNIX_FD, &sv[1])) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (!complete_dbus_request(message, sv, &r, NULL)) {
nih_error("%s: error completing dbus request", __func__);
goto out;
}
if (proxyrecv(sv[0], &nrpids, sizeof(uint32_t)) != sizeof(uint32_t))
goto out;
if (nrpids == -1) {
nih_error("%s: bad cgroup: %s:%s", __func__, controller, cgroup);
ret = -1;
goto out;
}
if (nrpids == 0) {
ret = 0;
goto out;
}
*pids = NIH_MUST( nih_alloc(parent, nrpids * sizeof(uint32_t)) );
for (i=0; i<nrpids; i++) {
get_scm_creds_sync(sv[0], &tcred);
if (tcred.pid == -1) {
nih_warn("%s: Failed getting pid from server",
__func__);
goto out;
}
(*pids)[i] = tcred.pid;
}
ret = nrpids;
out:
close(sv[0]);
close(sv[1]);
return ret;
}
int list_children_main (void *parent, char *controller, const char *cgroup,
struct ucred p, struct ucred r, char ***output)
{
DBusMessage *message;
DBusMessageIter iter;
int sv[2], ret = -1;
uint32_t len;
int32_t nrkids;
nih_local char * paths = NULL;
char *s;
int i;
*output = NULL;
if (memcmp(&p, &r, sizeof(struct ucred)) != 0) {
nih_error("%s: proxy != requestor", __func__);
return -1;
}
if (!sane_cgroup(cgroup)) {
nih_error("%s: unsafe cgroup", __func__);
return -1;
}
if (!(message = start_dbus_request("ListChildrenScm", sv))) {
nih_error("%s: error starting dbus request", __func__);
return -1;
}
dbus_message_iter_init_append(message, &iter);
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &controller)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);
goto out;
}
if (! dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &cgroup)) {
nih_error("%s: out of memory", __func__);
dbus_message_unref(message);