/*
- * lttng-ust-abi.c
- *
- * LTTng UST ABI
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * 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; only
- * version 2.1 of the License.
- *
- * 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
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
+ * LTTng UST ABI
*
* Mimic system calls for:
* - session creation, returns an object descriptor or failure.
* - Takes instrumentation source specific arguments.
*/
-#include <lttng/ust-abi.h>
-#include <lttng/ust-error.h>
+#define _LGPL_SOURCE
+#include <fcntl.h>
+#include <stdint.h>
+#include <unistd.h>
+
#include <urcu/compiler.h>
#include <urcu/list.h>
+
+#include <helper.h>
+#include <lttng/tracepoint.h>
+#include <lttng/ust-abi.h>
+#include <lttng/ust-error.h>
#include <lttng/ust-events.h>
#include <lttng/ust-version.h>
-#include <lttng/tracepoint.h>
-#include "tracepoint-internal.h"
+#include <ust-fd.h>
#include <usterr-signal-safe.h>
-#include <helper.h>
-#include "lttng-tracer.h"
-#include "../libringbuffer/shm.h"
+
#include "../libringbuffer/frontend_types.h"
+#include "../libringbuffer/shm.h"
+#include "../libcounter/counter.h"
+#include "tracepoint-internal.h"
+#include "lttng-tracer.h"
+#include "string-utils.h"
+#include "ust-events-internal.h"
#define OBJ_NAME_LEN 16
}
if (is_owner) {
if (!obj->u.s.owner_ref) {
- ERR("Error decrementing owner reference");
+ ERR("Error decrementing owner reference\n");
return -EINVAL;
}
obj->u.s.owner_ref--;
}
if ((--obj->u.s.f_count) == 1) {
const struct lttng_ust_objd_ops *ops = objd_ops(id);
-
+
if (ops->release)
ops->release(id);
objd_free(id);
*/
static const struct lttng_ust_objd_ops lttng_ops;
+static const struct lttng_ust_objd_ops lttng_event_notifier_group_ops;
static const struct lttng_ust_objd_ops lttng_session_ops;
static const struct lttng_ust_objd_ops lttng_channel_ops;
-static const struct lttng_ust_objd_ops lttng_enabler_ops;
+static const struct lttng_ust_objd_ops lttng_counter_ops;
+static const struct lttng_ust_objd_ops lttng_event_enabler_ops;
+static const struct lttng_ust_objd_ops lttng_event_notifier_enabler_ops;
static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops;
static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops;
return 0;
}
+static
+int lttng_abi_event_notifier_send_fd(void *owner, int *event_notifier_notif_fd)
+{
+ struct lttng_event_notifier_group *event_notifier_group;
+ int event_notifier_group_objd, ret, fd_flag;
+
+ event_notifier_group = lttng_event_notifier_group_create();
+ if (!event_notifier_group)
+ return -ENOMEM;
+
+ /*
+ * Set this file descriptor as NON-BLOCKING.
+ */
+ fd_flag = fcntl(*event_notifier_notif_fd, F_GETFL);
+
+ fd_flag |= O_NONBLOCK;
+
+ ret = fcntl(*event_notifier_notif_fd, F_SETFL, fd_flag);
+ if (ret) {
+ ret = -errno;
+ goto fd_error;
+ }
+
+ event_notifier_group_objd = objd_alloc(event_notifier_group,
+ <tng_event_notifier_group_ops, owner, "event_notifier_group");
+ if (event_notifier_group_objd < 0) {
+ ret = event_notifier_group_objd;
+ goto objd_error;
+ }
+
+ event_notifier_group->objd = event_notifier_group_objd;
+ event_notifier_group->owner = owner;
+ event_notifier_group->notification_fd = *event_notifier_notif_fd;
+ /* Object descriptor takes ownership of notification fd. */
+ *event_notifier_notif_fd = -1;
+
+ return event_notifier_group_objd;
+
+objd_error:
+ lttng_event_notifier_group_destroy(event_notifier_group);
+fd_error:
+ return ret;
+}
+
static
long lttng_abi_add_context(int objd,
struct lttng_ust_context *context_param,
case LTTNG_UST_TRACEPOINT_FIELD_LIST:
return lttng_abi_tracepoint_field_list(owner);
case LTTNG_UST_WAIT_QUIESCENT:
- synchronize_trace();
+ lttng_ust_synchronize_trace();
return 0;
+ case LTTNG_UST_EVENT_NOTIFIER_GROUP_CREATE:
+ return lttng_abi_event_notifier_send_fd(owner,
+ &uargs->event_notifier_handle.event_notifier_notif_fd);
default:
return -EINVAL;
}
.cmd = lttng_cmd,
};
+static
int lttng_abi_map_channel(int session_objd,
struct lttng_ust_channel *ust_chan,
union ust_args *uargs,
goto handle_error;
}
+ /* Ownership of chan_data and wakeup_fd taken by channel handle. */
+ uargs->channel.chan_data = NULL;
+ uargs->channel.wakeup_fd = -1;
+
chan = shmp(channel_handle, channel_handle->chan);
assert(chan);
chan->handle = channel_handle;
/* Initialize our lttng chan */
lttng_chan->chan = chan;
- lttng_chan->tstate = 1;
- lttng_chan->enabled = 1;
+ lttng_chan->enabled = 1; /* Backward compatibility */
lttng_chan->ctx = NULL;
- lttng_chan->session = session;
+ lttng_chan->session = session; /* Backward compatibility */
lttng_chan->ops = &transport->ops;
memcpy(<tng_chan->chan->backend.config,
transport->client_config,
lttng_chan->handle = channel_handle;
lttng_chan->type = type;
+ /* Set container properties */
+ lttng_chan->parent.type = LTTNG_EVENT_CONTAINER_CHANNEL;
+ lttng_chan->parent.session = session;
+ lttng_chan->parent.enabled = 1;
+ lttng_chan->parent.tstate = 1;
+ /*
+ * The ring buffer always coalesces hits from various event
+ * enablers matching a given event to a single event record within the
+ * ring buffer.
+ */
+ lttng_chan->parent.coalesce_hits = true;
+
/*
* We tolerate no failure path after channel creation. It will stay
* invariant for the rest of the session.
*/
objd_set_private(chan_objd, lttng_chan);
- lttng_chan->objd = chan_objd;
+ lttng_chan->parent.objd = chan_objd;
/* The channel created holds a reference on the session */
objd_ref(session_objd);
return chan_objd;
channel_destroy(chan, channel_handle, 0);
return ret;
- /*
- * error path before channel creation (owning chan_data and
- * wakeup_fd).
- */
handle_error:
active:
invalid:
+ return ret;
+}
+
+static
+long lttng_abi_session_create_counter(
+ int session_objd,
+ struct lttng_ust_counter *ust_counter,
+ union ust_args *uargs,
+ void *owner)
+{
+ struct lttng_session *session = objd_private(session_objd);
+ int counter_objd, ret, i;
+ char *counter_transport_name;
+ struct lttng_counter *counter = NULL;
+ struct lttng_event_container *container;
+ size_t dimension_sizes[LTTNG_UST_COUNTER_DIMENSION_MAX] = { 0 };
+ size_t number_dimensions;
+ const struct lttng_ust_counter_conf *counter_conf;
+
+ if (ust_counter->len != sizeof(*counter_conf)) {
+ ERR("LTTng: Map: Error counter configuration of wrong size.\n");
+ return -EINVAL;
+ }
+ counter_conf = uargs->counter.counter_data;
+
+ if (counter_conf->arithmetic != LTTNG_UST_COUNTER_ARITHMETIC_MODULAR) {
+ ERR("LTTng: Map: Error counter of the wrong type.\n");
+ return -EINVAL;
+ }
+
+ if (counter_conf->global_sum_step) {
+ /* Unsupported. */
+ return -EINVAL;
+ }
+
+ switch (counter_conf->bitness) {
+ case LTTNG_UST_COUNTER_BITNESS_64:
+ counter_transport_name = "counter-per-cpu-64-modular";
+ break;
+ case LTTNG_UST_COUNTER_BITNESS_32:
+ counter_transport_name = "counter-per-cpu-32-modular";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ number_dimensions = (size_t) counter_conf->number_dimensions;
+
+ for (i = 0; i < counter_conf->number_dimensions; i++) {
+ if (counter_conf->dimensions[i].has_underflow)
+ return -EINVAL;
+ if (counter_conf->dimensions[i].has_overflow)
+ return -EINVAL;
+ dimension_sizes[i] = counter_conf->dimensions[i].size;
+ }
+
+ counter_objd = objd_alloc(NULL, <tng_counter_ops, owner, "counter");
+ if (counter_objd < 0) {
+ ret = counter_objd;
+ goto objd_error;
+ }
+
+ counter = lttng_session_create_counter(session,
+ counter_transport_name,
+ number_dimensions, dimension_sizes,
+ 0, counter_conf->coalesce_hits);
+ if (!counter) {
+ ret = -EINVAL;
+ goto counter_error;
+ }
+ container = lttng_counter_get_event_container(counter);
+ objd_set_private(counter_objd, counter);
+ container->objd = counter_objd;
+ container->enabled = 1;
+ container->tstate = 1;
+ /* The channel created holds a reference on the session */
+ objd_ref(session_objd);
+ return counter_objd;
+
+counter_error:
{
- int close_ret;
+ int err;
- close_ret = close(wakeup_fd);
- if (close_ret) {
- PERROR("close");
- }
+ err = lttng_ust_objd_unref(counter_objd, 1);
+ assert(!err);
}
- free(chan_data);
+objd_error:
return ret;
}
+
/**
* lttng_session_cmd - lttng session object command
*
return lttng_session_disable(session);
case LTTNG_UST_SESSION_STATEDUMP:
return lttng_session_statedump(session);
+ case LTTNG_UST_COUNTER:
+ return lttng_abi_session_create_counter(objd,
+ (struct lttng_ust_counter *) arg,
+ uargs, owner);
+ case LTTNG_UST_COUNTER_GLOBAL:
+ case LTTNG_UST_COUNTER_CPU:
+ /* Not implemented yet. */
+ return -EINVAL;
default:
return -EINVAL;
}
.cmd = lttng_session_cmd,
};
+static int lttng_ust_event_notifier_enabler_create(int event_notifier_group_obj,
+ void *owner, struct lttng_ust_event_notifier *event_notifier_param,
+ enum lttng_enabler_format_type type)
+{
+ struct lttng_event_notifier_group *event_notifier_group =
+ objd_private(event_notifier_group_obj);
+ struct lttng_event_notifier_enabler *event_notifier_enabler;
+ int event_notifier_objd, ret;
+
+ event_notifier_param->event.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ event_notifier_objd = objd_alloc(NULL, <tng_event_notifier_enabler_ops, owner,
+ "event_notifier enabler");
+ if (event_notifier_objd < 0) {
+ ret = event_notifier_objd;
+ goto objd_error;
+ }
+
+ event_notifier_enabler = lttng_event_notifier_enabler_create(
+ event_notifier_group, type, event_notifier_param);
+ if (!event_notifier_enabler) {
+ ret = -ENOMEM;
+ goto event_notifier_error;
+ }
+
+ objd_set_private(event_notifier_objd, event_notifier_enabler);
+ /* The event_notifier holds a reference on the event_notifier group. */
+ objd_ref(event_notifier_enabler->group->objd);
+
+ return event_notifier_objd;
+
+event_notifier_error:
+ {
+ int err;
+
+ err = lttng_ust_objd_unref(event_notifier_objd, 1);
+ assert(!err);
+ }
+objd_error:
+ return ret;
+}
+
+static
+long lttng_event_notifier_enabler_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
+{
+ struct lttng_event_notifier_enabler *event_notifier_enabler = objd_private(objd);
+ switch (cmd) {
+ case LTTNG_UST_FILTER:
+ return lttng_event_notifier_enabler_attach_filter_bytecode(
+ event_notifier_enabler,
+ (struct lttng_ust_bytecode_node **) arg);
+ case LTTNG_UST_EXCLUSION:
+ return lttng_event_notifier_enabler_attach_exclusion(event_notifier_enabler,
+ (struct lttng_ust_excluder_node **) arg);
+ case LTTNG_UST_CAPTURE:
+ return lttng_event_notifier_enabler_attach_capture_bytecode(
+ event_notifier_enabler,
+ (struct lttng_ust_bytecode_node **) arg);
+ case LTTNG_UST_ENABLE:
+ return lttng_event_notifier_enabler_enable(event_notifier_enabler);
+ case LTTNG_UST_DISABLE:
+ return lttng_event_notifier_enabler_disable(event_notifier_enabler);
+ default:
+ return -EINVAL;
+ }
+}
+
+/**
+ * lttng_event_notifier_group_error_counter_cmd - lttng event_notifier group error counter object command
+ *
+ * @obj: the object
+ * @cmd: the command
+ * @arg: command arg
+ * @uargs: UST arguments (internal)
+ * @owner: objd owner
+ *
+ * This descriptor implements lttng commands:
+ * LTTNG_UST_COUNTER_GLOBAL
+ * Return negative error code on error, 0 on success.
+ * LTTNG_UST_COUNTER_CPU
+ * Return negative error code on error, 0 on success.
+ */
+static
+long lttng_event_notifier_group_error_counter_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
+{
+ int ret;
+ struct lttng_counter *counter = objd_private(objd);
+
+ switch (cmd) {
+ case LTTNG_UST_COUNTER_GLOBAL:
+ ret = -EINVAL; /* Unimplemented. */
+ break;
+ case LTTNG_UST_COUNTER_CPU:
+ {
+ struct lttng_ust_counter_cpu *counter_cpu =
+ (struct lttng_ust_counter_cpu *)arg;
+
+ ret = lttng_counter_set_cpu_shm(counter->counter,
+ counter_cpu->cpu_nr, uargs->counter_shm.shm_fd);
+ if (!ret) {
+ /* Take ownership of the shm_fd. */
+ uargs->counter_shm.shm_fd = -1;
+ }
+ break;
+ }
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+LTTNG_HIDDEN
+int lttng_release_event_notifier_group_error_counter(int objd)
+{
+ struct lttng_counter *counter = objd_private(objd);
+
+ if (counter) {
+ return lttng_ust_objd_unref(counter->owner.event_notifier_group->objd, 0);
+ } else {
+ return -EINVAL;
+ }
+}
+
+static const struct lttng_ust_objd_ops lttng_event_notifier_group_error_counter_ops = {
+ .release = lttng_release_event_notifier_group_error_counter,
+ .cmd = lttng_event_notifier_group_error_counter_cmd,
+};
+
+static
+int lttng_ust_event_notifier_group_create_error_counter(int event_notifier_group_objd, void *owner,
+ struct lttng_ust_counter_conf *error_counter_conf)
+{
+ const char *counter_transport_name;
+ struct lttng_event_notifier_group *event_notifier_group =
+ objd_private(event_notifier_group_objd);
+ struct lttng_counter *counter;
+ struct lttng_event_container *container;
+ int counter_objd, ret;
+ size_t counter_len;
+
+ if (event_notifier_group->error_counter)
+ return -EBUSY;
+
+ if (error_counter_conf->arithmetic != LTTNG_UST_COUNTER_ARITHMETIC_MODULAR)
+ return -EINVAL;
+
+ if (error_counter_conf->number_dimensions != 1)
+ return -EINVAL;
+
+ if (error_counter_conf->dimensions[0].has_underflow)
+ return -EINVAL;
+
+ if (error_counter_conf->dimensions[0].has_overflow)
+ return -EINVAL;
+
+ switch (error_counter_conf->bitness) {
+ case LTTNG_UST_COUNTER_BITNESS_64:
+ counter_transport_name = "counter-per-cpu-64-modular";
+ break;
+ case LTTNG_UST_COUNTER_BITNESS_32:
+ counter_transport_name = "counter-per-cpu-32-modular";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ counter_objd = objd_alloc(NULL, <tng_event_notifier_group_error_counter_ops, owner,
+ "event_notifier group error counter");
+ if (counter_objd < 0) {
+ ret = counter_objd;
+ goto objd_error;
+ }
+
+ counter_len = error_counter_conf->dimensions[0].size;
+ counter = lttng_ust_counter_create(counter_transport_name, 1, &counter_len, 0, false);
+ if (!counter) {
+ ret = -EINVAL;
+ goto create_error;
+ }
+ container = lttng_counter_get_event_container(counter);
+
+ event_notifier_group->error_counter_len = counter_len;
+ /*
+ * store-release to publish error counter matches load-acquire
+ * in record_error. Ensures the counter is created and the
+ * error_counter_len is set before they are used.
+ * Currently a full memory barrier is used, which could be
+ * turned into acquire-release barriers.
+ */
+ cmm_smp_mb();
+ CMM_STORE_SHARED(event_notifier_group->error_counter, counter);
+
+ container->objd = counter_objd;
+ counter->owner.event_notifier_group = event_notifier_group; /* owner */
+
+ objd_set_private(counter_objd, counter);
+ /* The error counter holds a reference on the event_notifier group. */
+ objd_ref(event_notifier_group->objd);
+
+ return counter_objd;
+
+create_error:
+ {
+ int err;
+
+ err = lttng_ust_objd_unref(counter_objd, 1);
+ assert(!err);
+ }
+objd_error:
+ return ret;
+}
+
+static
+long lttng_event_notifier_group_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
+{
+ switch (cmd) {
+ case LTTNG_UST_EVENT_NOTIFIER_CREATE:
+ {
+ struct lttng_ust_event_notifier *event_notifier_param =
+ (struct lttng_ust_event_notifier *) arg;
+ if (strutils_is_star_glob_pattern(event_notifier_param->event.name)) {
+ /*
+ * If the event name is a star globbing pattern,
+ * we create the special star globbing enabler.
+ */
+ return lttng_ust_event_notifier_enabler_create(objd,
+ owner, event_notifier_param,
+ LTTNG_ENABLER_FORMAT_STAR_GLOB);
+ } else {
+ return lttng_ust_event_notifier_enabler_create(objd,
+ owner, event_notifier_param,
+ LTTNG_ENABLER_FORMAT_EVENT);
+ }
+ }
+ case LTTNG_UST_COUNTER:
+ {
+ struct lttng_ust_counter_conf *counter_conf =
+ (struct lttng_ust_counter_conf *) uargs->counter.counter_data;
+ return lttng_ust_event_notifier_group_create_error_counter(
+ objd, owner, counter_conf);
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static
+int lttng_event_notifier_enabler_release(int objd)
+{
+ struct lttng_event_notifier_enabler *event_notifier_enabler = objd_private(objd);
+
+ if (event_notifier_enabler)
+ return lttng_ust_objd_unref(event_notifier_enabler->group->objd, 0);
+ return 0;
+}
+
+static const struct lttng_ust_objd_ops lttng_event_notifier_enabler_ops = {
+ .release = lttng_event_notifier_enabler_release,
+ .cmd = lttng_event_notifier_enabler_cmd,
+};
+
+static
+int lttng_release_event_notifier_group(int objd)
+{
+ struct lttng_event_notifier_group *event_notifier_group = objd_private(objd);
+
+ if (event_notifier_group) {
+ lttng_event_notifier_group_destroy(event_notifier_group);
+ return 0;
+ } else {
+ return -EINVAL;
+ }
+}
+
+static const struct lttng_ust_objd_ops lttng_event_notifier_group_ops = {
+ .release = lttng_release_event_notifier_group,
+ .cmd = lttng_event_notifier_group_cmd,
+};
+
static
long lttng_tracepoint_list_cmd(int objd, unsigned int cmd, unsigned long arg,
union ust_args *uargs, void *owner)
info->stream_nr, info->len);
if (ret)
goto error_add_stream;
+ /* Take ownership of shm_fd and wakeup_fd. */
+ uargs->stream.shm_fd = -1;
+ uargs->stream.wakeup_fd = -1;
return 0;
}
static
-int lttng_abi_create_enabler(int channel_objd,
+int lttng_abi_create_event_enabler(int objd, /* channel or counter objd */
+ struct lttng_event_container *container,
struct lttng_ust_event *event_param,
+ struct lttng_ust_counter_key *key_param,
void *owner,
- enum lttng_enabler_type type)
+ enum lttng_enabler_format_type format_type)
{
- struct lttng_channel *channel = objd_private(channel_objd);
- struct lttng_enabler *enabler;
+ struct lttng_event_enabler *enabler;
int event_objd, ret;
event_param->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
- event_objd = objd_alloc(NULL, <tng_enabler_ops, owner, "enabler");
+ event_objd = objd_alloc(NULL, <tng_event_enabler_ops, owner,
+ "event enabler");
if (event_objd < 0) {
ret = event_objd;
goto objd_error;
* We tolerate no failure path after event creation. It will stay
* invariant for the rest of the session.
*/
- enabler = lttng_enabler_create(type, event_param, channel);
+ enabler = lttng_event_enabler_create(format_type, event_param,
+ key_param, container);
if (!enabler) {
ret = -ENOMEM;
goto event_error;
}
objd_set_private(event_objd, enabler);
- /* The event holds a reference on the channel */
- objd_ref(channel_objd);
+ /* The event holds a reference on the channel or counter */
+ objd_ref(objd);
return event_objd;
event_error:
union ust_args *uargs, void *owner)
{
struct lttng_channel *channel = objd_private(objd);
+ struct lttng_event_container *container = lttng_channel_get_event_container(channel);
if (cmd != LTTNG_UST_STREAM) {
/*
{
struct lttng_ust_event *event_param =
(struct lttng_ust_event *) arg;
- if (event_param->name[strlen(event_param->name) - 1] == '*') {
- /* If ends with wildcard, create wildcard. */
- return lttng_abi_create_enabler(objd, event_param,
- owner, LTTNG_ENABLER_WILDCARD);
+
+ if (strutils_is_star_glob_pattern(event_param->name)) {
+ /*
+ * If the event name is a star globbing pattern,
+ * we create the special star globbing enabler.
+ */
+ return lttng_abi_create_event_enabler(objd, container, event_param, NULL,
+ owner, LTTNG_ENABLER_FORMAT_STAR_GLOB);
} else {
- return lttng_abi_create_enabler(objd, event_param,
- owner, LTTNG_ENABLER_EVENT);
+ return lttng_abi_create_event_enabler(objd, container, event_param, NULL,
+ owner, LTTNG_ENABLER_FORMAT_EVENT);
}
}
case LTTNG_UST_CONTEXT:
(struct lttng_ust_context *) arg, uargs,
&channel->ctx, channel->session);
case LTTNG_UST_ENABLE:
- return lttng_channel_enable(channel);
+ return lttng_event_container_enable(&channel->parent);
case LTTNG_UST_DISABLE:
- return lttng_channel_disable(channel);
+ return lttng_event_container_disable(&channel->parent);
case LTTNG_UST_FLUSH_BUFFER:
return channel->ops->flush_buffer(channel->chan, channel->handle);
default:
.cmd = lttng_channel_cmd,
};
+/**
+ * lttng_counter_cmd - lttng control through object descriptors
+ *
+ * @objd: the object descriptor
+ * @cmd: the command
+ * @arg: command arg
+ * @uargs: UST arguments (internal)
+ * @owner: objd owner
+ *
+ * This object descriptor implements lttng commands:
+ * LTTNG_UST_COUNTER_GLOBAL:
+ * Returns a global counter object descriptor or failure.
+ * LTTNG_UST_COUNTER_CPU:
+ * Returns a per-cpu counter object descriptor or failure.
+ * LTTNG_UST_COUNTER_EVENT
+ * Returns an event object descriptor or failure.
+ * LTTNG_UST_ENABLE
+ * Enable recording for events in this channel (weak enable)
+ * LTTNG_UST_DISABLE
+ * Disable recording for events in this channel (strong disable)
+ *
+ * Counter and event object descriptors also hold a reference on the session.
+ */
+static
+long lttng_counter_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
+{
+ struct lttng_counter *counter = objd_private(objd);
+ struct lttng_event_container *container = lttng_counter_get_event_container(counter);
+
+ if (cmd != LTTNG_UST_COUNTER_GLOBAL && cmd != LTTNG_UST_COUNTER_CPU) {
+ /*
+ * Check if counter received all global/per-cpu objects.
+ */
+ if (!lttng_counter_ready(counter->counter))
+ return -EPERM;
+ }
+
+ switch (cmd) {
+ case LTTNG_UST_COUNTER_GLOBAL:
+ {
+ long ret;
+ int shm_fd;
+
+ shm_fd = uargs->counter_shm.shm_fd;
+ ret = lttng_counter_set_global_shm(counter->counter, shm_fd);
+ if (!ret) {
+ /* Take ownership of shm_fd. */
+ uargs->counter_shm.shm_fd = -1;
+ }
+ return ret;
+ }
+ case LTTNG_UST_COUNTER_CPU:
+ {
+ struct lttng_ust_counter_cpu *counter_cpu =
+ (struct lttng_ust_counter_cpu *) arg;
+ long ret;
+ int shm_fd;
+
+ shm_fd = uargs->counter_shm.shm_fd;
+ ret = lttng_counter_set_cpu_shm(counter->counter,
+ counter_cpu->cpu_nr, shm_fd);
+ if (!ret) {
+ /* Take ownership of shm_fd. */
+ uargs->counter_shm.shm_fd = -1;
+ }
+ return ret;
+ }
+ case LTTNG_UST_COUNTER_EVENT:
+ {
+ struct lttng_ust_counter_event *counter_event_param =
+ (struct lttng_ust_counter_event *) arg;
+ struct lttng_ust_event *event_param = &counter_event_param->event;
+ struct lttng_ust_counter_key *key_param = &counter_event_param->key;
+
+ if (strutils_is_star_glob_pattern(event_param->name)) {
+ /*
+ * If the event name is a star globbing pattern,
+ * we create the special star globbing enabler.
+ */
+ return lttng_abi_create_event_enabler(objd, container, event_param, key_param,
+ owner, LTTNG_ENABLER_FORMAT_STAR_GLOB);
+ } else {
+ return lttng_abi_create_event_enabler(objd, container, event_param, key_param,
+ owner, LTTNG_ENABLER_FORMAT_EVENT);
+ }
+ }
+ case LTTNG_UST_ENABLE:
+ return lttng_event_container_enable(container);
+ case LTTNG_UST_DISABLE:
+ return lttng_event_container_disable(container);
+ default:
+ return -EINVAL;
+ }
+}
+
+
+static
+int lttng_counter_release(int objd)
+{
+ struct lttng_counter *counter = objd_private(objd);
+
+ if (counter) {
+ struct lttng_event_container *container = lttng_counter_get_event_container(counter);
+
+ return lttng_ust_objd_unref(container->session->objd, 0);
+ }
+ return 0;
+}
+
+static const struct lttng_ust_objd_ops lttng_counter_ops = {
+ .release = lttng_counter_release,
+ .cmd = lttng_counter_cmd,
+};
+
/**
* lttng_enabler_cmd - lttng control through object descriptors
*
* Attach exclusions to an enabler.
*/
static
-long lttng_enabler_cmd(int objd, unsigned int cmd, unsigned long arg,
+long lttng_event_enabler_cmd(int objd, unsigned int cmd, unsigned long arg,
union ust_args *uargs, void *owner)
{
- struct lttng_enabler *enabler = objd_private(objd);
+ struct lttng_event_enabler *enabler = objd_private(objd);
switch (cmd) {
case LTTNG_UST_CONTEXT:
- return lttng_enabler_attach_context(enabler,
+ return lttng_event_enabler_attach_context(enabler,
(struct lttng_ust_context *) arg);
case LTTNG_UST_ENABLE:
- return lttng_enabler_enable(enabler);
+ return lttng_event_enabler_enable(enabler);
case LTTNG_UST_DISABLE:
- return lttng_enabler_disable(enabler);
+ return lttng_event_enabler_disable(enabler);
case LTTNG_UST_FILTER:
{
int ret;
- ret = lttng_enabler_attach_bytecode(enabler,
- (struct lttng_ust_filter_bytecode_node *) arg);
+ ret = lttng_event_enabler_attach_filter_bytecode(enabler,
+ (struct lttng_ust_bytecode_node **) arg);
if (ret)
return ret;
return 0;
}
case LTTNG_UST_EXCLUSION:
{
- return lttng_enabler_attach_exclusion(enabler,
- (struct lttng_ust_excluder_node *) arg);
+ return lttng_event_enabler_attach_exclusion(enabler,
+ (struct lttng_ust_excluder_node **) arg);
}
default:
return -EINVAL;
}
static
-int lttng_enabler_release(int objd)
+int lttng_event_enabler_release(int objd)
{
- struct lttng_enabler *enabler = objd_private(objd);
+ struct lttng_event_enabler *event_enabler = objd_private(objd);
+
+ if (event_enabler)
+ return lttng_ust_objd_unref(event_enabler->container->objd, 0);
- if (enabler)
- return lttng_ust_objd_unref(enabler->chan->objd, 0);
return 0;
}
-static const struct lttng_ust_objd_ops lttng_enabler_ops = {
- .release = lttng_enabler_release,
- .cmd = lttng_enabler_cmd,
+static const struct lttng_ust_objd_ops lttng_event_enabler_ops = {
+ .release = lttng_event_enabler_release,
+ .cmd = lttng_event_enabler_cmd,
};
void lttng_ust_abi_exit(void)
projects / deliverable / lttng-ust.git / blobdiff