/*
- * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
- * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License only.
- *
- * 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.
+ * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
+ * Copyright (C) 2011-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
#include <stdint.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
#include <lttng/ust-config.h>
#include <lttng/ust-ctl.h>
#include "../liblttng-ust/lttng-rb-clients.h"
#include "../liblttng-ust/clock.h"
#include "../liblttng-ust/getenv.h"
+#include "../liblttng-ust/lttng-tracer-core.h"
#include "../libcounter/shm.h"
#include "../libcounter/smp.h"
extern void lttng_ring_buffer_client_discard_exit(void);
extern void lttng_ring_buffer_client_discard_rt_exit(void);
extern void lttng_ring_buffer_metadata_client_exit(void);
+LTTNG_HIDDEN
extern void lttng_counter_client_percpu_32_modular_init(void);
+LTTNG_HIDDEN
extern void lttng_counter_client_percpu_32_modular_exit(void);
+LTTNG_HIDDEN
extern void lttng_counter_client_percpu_64_modular_init(void);
+LTTNG_HIDDEN
extern void lttng_counter_client_percpu_64_modular_exit(void);
int ustctl_release_handle(int sock, int handle)
struct ustcomm_ust_msg lum;
struct ustcomm_ust_reply lur;
struct lttng_ust_object_data *event_notifier_data;
+ ssize_t len;
int ret;
if (!event_notifier_group || !_event_notifier_data)
memset(&lum, 0, sizeof(lum));
lum.handle = event_notifier_group->handle;
lum.cmd = LTTNG_UST_EVENT_NOTIFIER_CREATE;
+ lum.u.event_notifier.len = sizeof(*event_notifier);
- strncpy(lum.u.event_notifier.event.name, event_notifier->event.name,
- LTTNG_UST_SYM_NAME_LEN);
- lum.u.event_notifier.event.instrumentation = event_notifier->event.instrumentation;
- lum.u.event_notifier.event.loglevel_type = event_notifier->event.loglevel_type;
- lum.u.event_notifier.event.loglevel = event_notifier->event.loglevel;
- lum.u.event_notifier.event.token = event_notifier->event.token;
- lum.u.event_notifier.error_counter_index = event_notifier->error_counter_index;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret) {
+ free(event_notifier_data);
+ return ret;
+ }
+ /* Send struct lttng_ust_event_notifier */
+ len = ustcomm_send_unix_sock(sock, event_notifier, sizeof(*event_notifier));
+ if (len != sizeof(*event_notifier)) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
if (ret) {
free(event_notifier_data);
return ret;
#endif
+#ifdef __linux__
+/*
+ * Override application pid/uid/gid with unix socket credentials. If
+ * the application announced a pid matching our view, it means it is
+ * within the same pid namespace, so expose the ppid provided by the
+ * application.
+ */
+static
+int get_cred(int sock,
+ const struct ustctl_reg_msg *reg_msg,
+ uint32_t *pid,
+ uint32_t *ppid,
+ uint32_t *uid,
+ uint32_t *gid)
+{
+ struct ucred ucred;
+ socklen_t ucred_len = sizeof(struct ucred);
+ int ret;
+
+ ret = getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &ucred, &ucred_len);
+ if (ret) {
+ return -LTTNG_UST_ERR_PEERCRED;
+ }
+ DBG("Unix socket peercred [ pid: %u, uid: %u, gid: %u ], "
+ "application registered claiming [ pid: %u, ppid: %u, uid: %u, gid: %u ]",
+ ucred.pid, ucred.uid, ucred.gid,
+ reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid);
+ if (!ucred.pid) {
+ ERR("Unix socket credential pid=0. Refusing application in distinct, non-nested pid namespace.");
+ return -LTTNG_UST_ERR_PEERCRED_PID;
+ }
+ *pid = ucred.pid;
+ *uid = ucred.uid;
+ *gid = ucred.gid;
+ if (ucred.pid == reg_msg->pid) {
+ *ppid = reg_msg->ppid;
+ } else {
+ *ppid = 0;
+ }
+ return 0;
+}
+#elif defined(__FreeBSD__)
+#include <sys/ucred.h>
+#include <sys/un.h>
+
+/*
+ * Override application uid/gid with unix socket credentials. Use the
+ * first group of the cr_groups.
+ * Use the pid and ppid provided by the application on registration.
+ */
+static
+int get_cred(int sock,
+ const struct ustctl_reg_msg *reg_msg,
+ uint32_t *pid,
+ uint32_t *ppid,
+ uint32_t *uid,
+ uint32_t *gid)
+{
+ struct xucred xucred;
+ socklen_t xucred_len = sizeof(struct xucred);
+ int ret;
+
+ ret = getsockopt(sock, SOL_SOCKET, LOCAL_PEERCRED, &xucred, &xucred_len);
+ if (ret) {
+ return -LTTNG_UST_ERR_PEERCRED;
+ }
+ if (xucred.cr_version != XUCRED_VERSION || xucred.cr_ngroups < 1) {
+ return -LTTNG_UST_ERR_PEERCRED;
+ }
+ DBG("Unix socket peercred [ uid: %u, gid: %u ], "
+ "application registered claiming [ pid: %d, ppid: %d, uid: %u, gid: %u ]",
+ xucred.cr_uid, xucred.cr_groups[0],
+ reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid);
+ *pid = reg_msg->pid;
+ *ppid = reg_msg->ppid;
+ *uid = xucred.cr_uid;
+ *gid = xucred.cr_groups[0];
+ return 0;
+}
+#else
+#warning "Using insecure fallback: trusting user id provided by registered applications. Please consider implementing use of unix socket credentials on your platform."
+static
+int get_cred(int sock,
+ const struct ustctl_reg_msg *reg_msg,
+ uint32_t *pid,
+ uint32_t *ppid,
+ uint32_t *uid,
+ uint32_t *gid)
+{
+ DBG("Application registered claiming [ pid: %u, ppid: %d, uid: %u, gid: %u ]",
+ reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid);
+ *pid = reg_msg->pid;
+ *ppid = reg_msg->ppid;
+ *uid = reg_msg->uid;
+ *gid = reg_msg->gid;
+ return 0;
+}
+#endif
+
/*
* Returns 0 on success, negative error value on error.
*/
}
*major = reg_msg.major;
*minor = reg_msg.minor;
- *pid = reg_msg.pid;
- *ppid = reg_msg.ppid;
- *uid = reg_msg.uid;
- *gid = reg_msg.gid;
*bits_per_long = reg_msg.bits_per_long;
*uint8_t_alignment = reg_msg.uint8_t_alignment;
*uint16_t_alignment = reg_msg.uint16_t_alignment;
reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) {
return -LTTNG_UST_ERR_UNSUP_MAJOR;
}
-
- return 0;
+ return get_cred(sock, ®_msg, pid, ppid, uid, gid);
}
int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd)
struct lttng_ust_object_data **_counter_data)
{
struct lttng_ust_object_data *counter_data;
- struct lttng_ust_counter_conf counter_conf;
+ struct lttng_ust_counter_conf counter_conf = {0};
size_t i;
int ret;
}
switch (counter->attr->bitness) {
case USTCTL_COUNTER_BITNESS_32:
- counter_conf.bitness = LTTNG_UST_COUNTER_BITNESS_32BITS;
+ counter_conf.bitness = LTTNG_UST_COUNTER_BITNESS_32;
break;
case USTCTL_COUNTER_BITNESS_64:
- counter_conf.bitness = LTTNG_UST_COUNTER_BITNESS_64BITS;
+ counter_conf.bitness = LTTNG_UST_COUNTER_BITNESS_64;
break;
default:
return -EINVAL;
projects / lttng-ust.git / blobdiff