/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-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.
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <lttng/event.h>
+#include <lttng/lttng-error.h>
+#include <lttng/kernel-probe.h>
+#include <lttng/userspace-probe.h>
+#include <lttng/userspace-probe-internal.h>
+#include <lttng/event-rule/event-rule.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/kernel-probe.h>
+#include <lttng/event-rule/kernel-probe-internal.h>
+#include <lttng/event-rule/syscall.h>
+#include <lttng/event-rule/syscall-internal.h>
+#include <lttng/event-rule/tracepoint.h>
+#include <lttng/event-rule/tracepoint-internal.h>
+#include <lttng/event-rule/userspace-probe-internal.h>
#include <common/common.h>
#include <common/defaults.h>
+#include <common/trace-chunk.h>
+#include <common/macros.h>
#include "consumer.h"
#include "trace-kernel.h"
+#include "lttng-sessiond.h"
+#include "notification-thread-commands.h"
/*
* Find the channel name for the given kernel session.
*/
struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
- char *name, struct ltt_kernel_session *session)
+ const char *name, struct ltt_kernel_session *session)
{
struct ltt_kernel_channel *chan;
return NULL;
}
+/*
+ * Find the event for the given channel.
+ */
+struct ltt_kernel_event *trace_kernel_find_event(
+ char *name, struct ltt_kernel_channel *channel,
+ enum lttng_event_type type,
+ struct lttng_bytecode *filter)
+{
+ struct ltt_kernel_event *ev;
+ int found = 0;
+
+ assert(name);
+ assert(channel);
+
+ cds_list_for_each_entry(ev, &channel->events_list.head, list) {
+ if (type != LTTNG_EVENT_ALL && ev->type != type) {
+ continue;
+ }
+ if (strcmp(name, ev->event->name)) {
+ continue;
+ }
+ if ((ev->filter && !filter) || (!ev->filter && filter)) {
+ continue;
+ }
+ if (ev->filter && filter) {
+ if (ev->filter->len != filter->len ||
+ memcmp(ev->filter->data, filter->data,
+ filter->len) != 0) {
+ continue;
+ }
+ }
+ found = 1;
+ break;
+ }
+ if (found) {
+ DBG("Found event %s for channel %s", name,
+ channel->channel->name);
+ return ev;
+ } else {
+ return NULL;
+ }
+}
+
/*
* Find the event name for the given channel.
*/
struct ltt_kernel_event *trace_kernel_get_event_by_name(
- char *name, struct ltt_kernel_channel *channel)
+ char *name, struct ltt_kernel_channel *channel,
+ enum lttng_event_type type)
{
struct ltt_kernel_event *ev;
+ int found = 0;
assert(name);
assert(channel);
cds_list_for_each_entry(ev, &channel->events_list.head, list) {
- if (strcmp(name, ev->event->name) == 0) {
- DBG("Found event by name %s for channel %s", name,
- channel->channel->name);
- return ev;
+ if (type != LTTNG_EVENT_ALL && ev->type != type) {
+ continue;
+ }
+ if (strcmp(name, ev->event->name)) {
+ continue;
}
+ found = 1;
+ break;
+ }
+ if (found) {
+ DBG("Found event %s for channel %s", name,
+ channel->channel->name);
+ return ev;
+ } else {
+ return NULL;
}
-
- return NULL;
}
/*
lks->metadata = NULL;
CDS_INIT_LIST_HEAD(&lks->channel_list.head);
+ lks->tracker_pid = process_attr_tracker_create();
+ if (!lks->tracker_pid) {
+ goto error;
+ }
+ lks->tracker_vpid = process_attr_tracker_create();
+ if (!lks->tracker_vpid) {
+ goto error;
+ }
+ lks->tracker_uid = process_attr_tracker_create();
+ if (!lks->tracker_uid) {
+ goto error;
+ }
+ lks->tracker_vuid = process_attr_tracker_create();
+ if (!lks->tracker_vuid) {
+ goto error;
+ }
+ lks->tracker_gid = process_attr_tracker_create();
+ if (!lks->tracker_gid) {
+ goto error;
+ }
+ lks->tracker_vgid = process_attr_tracker_create();
+ if (!lks->tracker_vgid) {
+ goto error;
+ }
lks->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
if (lks->consumer == NULL) {
goto error;
}
- /*
- * The tmp_consumer stays NULL until a set_consumer_uri command is
- * executed. At this point, the consumer should be nullify until an
- * enable_consumer command. This assignment is symbolic since we've zmalloc
- * the struct.
- */
- lks->tmp_consumer = NULL;
-
return lks;
error:
+ process_attr_tracker_destroy(lks->tracker_pid);
+ process_attr_tracker_destroy(lks->tracker_vpid);
+ process_attr_tracker_destroy(lks->tracker_uid);
+ process_attr_tracker_destroy(lks->tracker_vuid);
+ process_attr_tracker_destroy(lks->tracker_gid);
+ process_attr_tracker_destroy(lks->tracker_vgid);
free(lks);
alloc_error:
struct lttng_channel *chan)
{
struct ltt_kernel_channel *lkc;
+ struct lttng_channel_extended *extended = NULL;
assert(chan);
lkc->channel = zmalloc(sizeof(struct lttng_channel));
if (lkc->channel == NULL) {
PERROR("lttng_channel zmalloc");
- free(lkc);
+ goto error;
+ }
+
+ extended = zmalloc(sizeof(struct lttng_channel_extended));
+ if (!extended) {
+ PERROR("lttng_channel_channel zmalloc");
goto error;
}
memcpy(lkc->channel, chan, sizeof(struct lttng_channel));
+ memcpy(extended, chan->attr.extended.ptr, sizeof(struct lttng_channel_extended));
+ lkc->channel->attr.extended.ptr = extended;
+ extended = NULL;
/*
* If we receive an empty string for channel name, it means the
strncpy(lkc->channel->name, DEFAULT_CHANNEL_NAME,
sizeof(lkc->channel->name));
}
- lkc->channel->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ lkc->channel->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
lkc->fd = -1;
lkc->stream_count = 0;
lkc->event_count = 0;
lkc->enabled = 1;
- lkc->ctx = NULL;
+ lkc->published_to_notification_thread = false;
/* Init linked list */
CDS_INIT_LIST_HEAD(&lkc->events_list.head);
CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
+ CDS_INIT_LIST_HEAD(&lkc->ctx_list);
return lkc;
error:
+ if (lkc) {
+ free(lkc->channel);
+ }
+ free(extended);
+ free(lkc);
return NULL;
}
+/*
+ * Allocate and init a kernel context object.
+ *
+ * Return the allocated object or NULL on error.
+ */
+struct ltt_kernel_context *trace_kernel_create_context(
+ struct lttng_kernel_context *ctx)
+{
+ struct ltt_kernel_context *kctx;
+
+ kctx = zmalloc(sizeof(*kctx));
+ if (!kctx) {
+ PERROR("zmalloc kernel context");
+ goto error;
+ }
+
+ if (ctx) {
+ memcpy(&kctx->ctx, ctx, sizeof(kctx->ctx));
+ }
+error:
+ return kctx;
+}
+
+/*
+ * Allocate and init a kernel context object from an existing kernel context
+ * object.
+ *
+ * Return the allocated object or NULL on error.
+ */
+struct ltt_kernel_context *trace_kernel_copy_context(
+ struct ltt_kernel_context *kctx)
+{
+ struct ltt_kernel_context *kctx_copy;
+
+ assert(kctx);
+ kctx_copy = zmalloc(sizeof(*kctx_copy));
+ if (!kctx_copy) {
+ PERROR("zmalloc ltt_kernel_context");
+ goto error;
+ }
+
+ memcpy(kctx_copy, kctx, sizeof(*kctx_copy));
+ memset(&kctx_copy->list, 0, sizeof(kctx_copy->list));
+
+error:
+ return kctx_copy;
+}
+
/*
* Allocate and initialize a kernel event. Set name and event type.
+ * We own filter_expression, and filter.
*
* Return pointer to structure or NULL.
*/
-struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev)
+enum lttng_error_code trace_kernel_create_event(
+ struct lttng_event *ev, char *filter_expression,
+ struct lttng_bytecode *filter,
+ struct ltt_kernel_event **kernel_event)
{
- struct ltt_kernel_event *lke;
+ enum lttng_error_code ret;
struct lttng_kernel_event *attr;
+ struct ltt_kernel_event *local_kernel_event;
+ struct lttng_userspace_probe_location *userspace_probe_location = NULL;
assert(ev);
- lke = zmalloc(sizeof(struct ltt_kernel_event));
+ local_kernel_event = zmalloc(sizeof(struct ltt_kernel_event));
attr = zmalloc(sizeof(struct lttng_kernel_event));
- if (lke == NULL || attr == NULL) {
+ if (local_kernel_event == NULL || attr == NULL) {
PERROR("kernel event zmalloc");
+ ret = LTTNG_ERR_NOMEM;
goto error;
}
ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN);
attr->u.kprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
break;
+ case LTTNG_EVENT_USERSPACE_PROBE:
+ {
+ const struct lttng_userspace_probe_location* location = NULL;
+ const struct lttng_userspace_probe_location_lookup_method *lookup = NULL;
+
+ location = lttng_event_get_userspace_probe_location(ev);
+ if (!location) {
+ ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ /*
+ * From this point on, the specific term 'uprobe' is used
+ * instead of the generic 'userspace probe' because it's the
+ * technology used at the moment for this instrumentation.
+ * LTTng currently implements userspace probes using uprobes.
+ * In the interactions with the kernel tracer, we use the
+ * uprobe term.
+ */
+ attr->instrumentation = LTTNG_KERNEL_UPROBE;
+
+ lookup = lttng_userspace_probe_location_get_lookup_method(
+ location);
+ if (!lookup) {
+ ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ /*
+ * From the kernel tracer's perspective, all userspace probe
+ * event types are all the same: a file and an offset.
+ */
+ switch (lttng_userspace_probe_location_lookup_method_get_type(lookup)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
+ /* Get the file descriptor on the target binary. */
+ attr->u.uprobe.fd =
+ lttng_userspace_probe_location_function_get_binary_fd(location);
+
+ /*
+ * Save a reference to the probe location used during
+ * the listing of events.
+ */
+ userspace_probe_location =
+ lttng_userspace_probe_location_copy(location);
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ /* Get the file descriptor on the target binary. */
+ attr->u.uprobe.fd =
+ lttng_userspace_probe_location_tracepoint_get_binary_fd(location);
+
+ /*
+ * Save a reference to the probe location used during the listing of
+ * events.
+ */
+ userspace_probe_location =
+ lttng_userspace_probe_location_copy(location);
+ break;
+ default:
+ DBG("Unsupported lookup method type");
+ ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+ break;
+ }
case LTTNG_EVENT_FUNCTION:
attr->instrumentation = LTTNG_KERNEL_KRETPROBE;
attr->u.kretprobe.addr = ev->attr.probe.addr;
break;
case LTTNG_EVENT_SYSCALL:
attr->instrumentation = LTTNG_KERNEL_SYSCALL;
+ attr->u.syscall.abi = LTTNG_KERNEL_SYSCALL_ABI_ALL;
+ attr->u.syscall.entryexit = LTTNG_KERNEL_SYSCALL_ENTRYEXIT;
+ attr->u.syscall.match = LTTNG_KERNEL_SYSCALL_MATCH_NAME;
break;
case LTTNG_EVENT_ALL:
attr->instrumentation = LTTNG_KERNEL_ALL;
break;
default:
ERR("Unknown kernel instrumentation type (%d)", ev->type);
+ ret = LTTNG_ERR_INVALID;
goto error;
}
attr->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
/* Setting up a kernel event */
- lke->fd = -1;
- lke->event = attr;
- lke->enabled = 1;
+ local_kernel_event->fd = -1;
+ local_kernel_event->event = attr;
+ local_kernel_event->enabled = 1;
+ local_kernel_event->filter_expression = filter_expression;
+ local_kernel_event->filter = filter;
+ local_kernel_event->userspace_probe_location = userspace_probe_location;
+
+ *kernel_event = local_kernel_event;
- return lke;
+ return LTTNG_OK;
error:
- free(lke);
+ free(filter_expression);
+ free(filter);
+ free(local_kernel_event);
free(attr);
- return NULL;
+ return ret;
}
+/*
+ * Allocate and initialize a kernel token event rule.
+ *
+ * Return pointer to structure or NULL.
+ */
+enum lttng_error_code trace_kernel_create_event_notifier_rule(
+ struct lttng_trigger *trigger,
+ uint64_t token,
+ struct ltt_kernel_event_notifier_rule **event_notifier_rule)
+{
+ enum lttng_error_code ret = LTTNG_OK;
+ enum lttng_condition_type condition_type;
+ enum lttng_event_rule_type event_rule_type;
+ enum lttng_condition_status condition_status;
+ struct ltt_kernel_event_notifier_rule *local_kernel_token_event_rule;
+ const struct lttng_condition *condition = NULL;
+ const struct lttng_event_rule *event_rule = NULL;
+
+ assert(event_notifier_rule);
+
+ condition = lttng_trigger_get_const_condition(trigger);
+ assert(condition);
+
+ condition_type = lttng_condition_get_type(condition);
+ assert(condition_type == LTTNG_CONDITION_TYPE_ON_EVENT);
+
+ condition_status = lttng_condition_on_event_get_rule(
+ condition, &event_rule);
+ assert(condition_status == LTTNG_CONDITION_STATUS_OK);
+ assert(event_rule);
+
+ event_rule_type = lttng_event_rule_get_type(event_rule);
+ assert(event_rule_type != LTTNG_EVENT_RULE_TYPE_UNKNOWN);
+
+ local_kernel_token_event_rule =
+ zmalloc(sizeof(struct ltt_kernel_event_notifier_rule));
+ if (local_kernel_token_event_rule == NULL) {
+ PERROR("Failed to allocate ltt_kernel_token_event_rule structure");
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ local_kernel_token_event_rule->fd = -1;
+ local_kernel_token_event_rule->enabled = 1;
+ local_kernel_token_event_rule->token = token;
+
+ /* Get the reference of the event rule. */
+ lttng_trigger_get(trigger);
+
+ local_kernel_token_event_rule->trigger = trigger;
+ /* The event rule still owns the filter and bytecode. */
+ local_kernel_token_event_rule->filter =
+ lttng_event_rule_get_filter_bytecode(event_rule);
+
+ DBG3("Created kernel event notifier rule: token = %" PRIu64,
+ local_kernel_token_event_rule->token);
+error:
+ *event_notifier_rule = local_kernel_token_event_rule;
+ return ret;
+}
+
+/*
+ * Initialize a kernel trigger from an event rule.
+ */
+enum lttng_error_code trace_kernel_init_event_notifier_from_event_rule(
+ const struct lttng_event_rule *rule,
+ struct lttng_kernel_event_notifier *kernel_event_notifier)
+{
+ enum lttng_error_code ret_code;
+ const char *name;
+ int strncpy_ret;
+
+ switch (lttng_event_rule_get_type(rule)) {
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE:
+ {
+ uint64_t address = 0, offset = 0;
+ const char *symbol_name = NULL;
+ const struct lttng_kernel_probe_location *location = NULL;
+ enum lttng_kernel_probe_location_status k_status;
+ enum lttng_event_rule_status status;
+
+ status = lttng_event_rule_kernel_probe_get_location(rule, &location);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret_code = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ switch (lttng_kernel_probe_location_get_type(location)) {
+ case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS:
+ {
+ k_status = lttng_kernel_probe_location_address_get_address(
+ location, &address);
+ assert(k_status == LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK);
+ break;
+ }
+ case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET:
+ {
+ k_status = lttng_kernel_probe_location_symbol_get_offset(
+ location, &offset);
+ assert(k_status == LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK);
+ symbol_name = lttng_kernel_probe_location_symbol_get_name(
+ location);
+ break;
+ }
+ default:
+ abort();
+ }
+
+ kernel_event_notifier->event.instrumentation = LTTNG_KERNEL_KPROBE;
+ kernel_event_notifier->event.u.kprobe.addr = address;
+ kernel_event_notifier->event.u.kprobe.offset = offset;
+ if (symbol_name) {
+ strncpy_ret = lttng_strncpy(
+ kernel_event_notifier->event.u.kprobe.symbol_name,
+ symbol_name, LTTNG_KERNEL_SYM_NAME_LEN);
+
+ if (strncpy_ret) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto error;
+ }
+ }
+
+ kernel_event_notifier->event.u.kprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
+
+ status = lttng_event_rule_kernel_probe_get_event_name(rule, &name);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+ ret_code = LTTNG_OK;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_USERSPACE_PROBE:
+ {
+ const struct lttng_userspace_probe_location* location = NULL;
+ const struct lttng_userspace_probe_location_lookup_method *lookup = NULL;
+ enum lttng_event_rule_status status;
+
+ status = lttng_event_rule_userspace_probe_get_location(rule, &location);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret_code = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ kernel_event_notifier->event.instrumentation = LTTNG_KERNEL_UPROBE;
+
+ lookup = lttng_userspace_probe_location_get_lookup_method(
+ location);
+ if (!lookup) {
+ ret_code = LTTNG_ERR_PROBE_LOCATION_INVAL;
+ goto error;
+ }
+
+ /*
+ * From the kernel tracer's perspective, all userspace probe
+ * event types are all the same: a file and an offset.
+ */
+ switch (lttng_userspace_probe_location_lookup_method_get_type(lookup)) {
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
+ /* Get the file descriptor on the target binary. */
+ kernel_event_notifier->event.u.uprobe.fd =
+ lttng_userspace_probe_location_function_get_binary_fd(location);
+
+ break;
+ case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
+ /* Get the file descriptor on the target binary. */
+ kernel_event_notifier->event.u.uprobe.fd =
+ lttng_userspace_probe_location_tracepoint_get_binary_fd(location);
+ break;
+ default:
+ abort();
+ }
+
+ status = lttng_event_rule_userspace_probe_get_event_name(
+ rule, &name);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+ ret_code = LTTNG_OK;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_TRACEPOINT:
+ {
+ const enum lttng_domain_type domain =
+ lttng_event_rule_get_domain_type(rule);
+ const enum lttng_event_rule_status status =
+ lttng_event_rule_tracepoint_get_pattern(
+ rule, &name);
+
+ assert(domain == LTTNG_DOMAIN_KERNEL);
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+ kernel_event_notifier->event.instrumentation =
+ LTTNG_KERNEL_TRACEPOINT;
+
+ ret_code = LTTNG_OK;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_SYSCALL:
+ {
+ const enum lttng_event_rule_status status =
+ lttng_event_rule_syscall_get_pattern(
+ rule, &name);
+
+ assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+ kernel_event_notifier->event.instrumentation =
+ LTTNG_KERNEL_SYSCALL;
+ kernel_event_notifier->event.u.syscall.abi =
+ LTTNG_KERNEL_SYSCALL_ABI_ALL;
+ kernel_event_notifier->event.u.syscall.entryexit =
+ LTTNG_KERNEL_SYSCALL_ENTRY;
+ kernel_event_notifier->event.u.syscall.match =
+ LTTNG_KERNEL_SYSCALL_MATCH_NAME;
+ ret_code = LTTNG_OK;
+ break;
+ }
+ case LTTNG_EVENT_RULE_TYPE_KERNEL_FUNCTION:
+ default:
+ abort();
+ break;
+ }
+
+ strncpy_ret = lttng_strncpy(kernel_event_notifier->event.name, name,
+ LTTNG_KERNEL_SYM_NAME_LEN);
+ if (strncpy_ret) {
+ ret_code = LTTNG_ERR_INVALID;
+ goto error;
+ }
+
+error:
+ return ret_code;
+}
/*
* Allocate and initialize a kernel metadata.
*
*/
struct ltt_kernel_metadata *trace_kernel_create_metadata(void)
{
+ int ret;
struct ltt_kernel_metadata *lkm;
struct lttng_channel *chan;
goto error;
}
+ ret = lttng_strncpy(
+ chan->name, DEFAULT_METADATA_NAME, sizeof(chan->name));
+ if (ret) {
+ ERR("Failed to initialize metadata channel name to `%s`",
+ DEFAULT_METADATA_NAME);
+ goto error;
+ }
+
/* Set default attributes */
- chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
+ chan->attr.overwrite = DEFAULT_METADATA_OVERWRITE;
chan->attr.subbuf_size = default_get_metadata_subbuf_size();
chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
- chan->attr.switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER;
- chan->attr.read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER;
- chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
+ chan->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER;
+ chan->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER;;
+
+
+ /*
+ * The metadata channel of kernel sessions must use the "mmap"
+ * back-end since the consumer daemon accumulates complete
+ * metadata units before sending them to the relay daemon in
+ * live mode. The consumer daemon also needs to extract the contents
+ * of the metadata cache when computing a rotation position.
+ *
+ * In both cases, it is not possible to rely on the splice
+ * back-end as the consumer daemon may need to accumulate more
+ * content than can be backed by the ring buffer's underlying
+ * pages.
+ */
+ chan->attr.output = LTTNG_EVENT_MMAP;
+ chan->attr.tracefile_size = 0;
+ chan->attr.tracefile_count = 0;
+ chan->attr.live_timer_interval = 0;
/* Init metadata */
lkm->fd = -1;
}
/* Set name */
- ret = snprintf(lks->name, sizeof(lks->name), "%s_%d", name, count);
+ ret = snprintf(lks->name, sizeof(lks->name), "%s_%u", name, count);
if (ret < 0) {
PERROR("snprintf stream name");
goto error;
PERROR("close");
}
} else {
- DBG("[trace] Tearing down event (no associated fd)");
+ DBG("[trace] Tearing down event (no associated file descriptor)");
}
/* Remove from event list */
cds_list_del(&event->list);
+ free(event->filter_expression);
+ free(event->filter);
+
free(event->event);
free(event);
}
+/*
+ * Cleanup kernel event structure.
+ */
+static void free_token_event_rule_rcu(struct rcu_head *rcu_node)
+{
+ struct ltt_kernel_event_notifier_rule *rule = caa_container_of(rcu_node,
+ struct ltt_kernel_event_notifier_rule, rcu_node);
+
+ free(rule);
+}
+
+void trace_kernel_destroy_event_notifier_rule(
+ struct ltt_kernel_event_notifier_rule *event)
+{
+ assert(event);
+
+ if (event->fd >= 0) {
+ const int ret = close(event->fd);
+
+ DBG("Closing kernel event notifier rule file descriptor: fd = %d",
+ event->fd);
+ if (ret) {
+ PERROR("Failed to close kernel event notifier file descriptor: fd = %d",
+ event->fd);
+ }
+ } else {
+ DBG("Destroying kernel event notifier rule (no associated file descriptor)");
+ }
+
+ lttng_trigger_put(event->trigger);
+ call_rcu(&event->rcu_node, free_token_event_rule_rcu);
+}
+/*
+ * Cleanup kernel context structure.
+ */
+void trace_kernel_destroy_context(struct ltt_kernel_context *ctx)
+{
+ assert(ctx);
+
+ if (ctx->in_list) {
+ cds_list_del(&ctx->list);
+ }
+ free(ctx);
+}
+
/*
* Cleanup kernel channel structure.
*/
{
struct ltt_kernel_stream *stream, *stmp;
struct ltt_kernel_event *event, *etmp;
+ struct ltt_kernel_context *ctx, *ctmp;
int ret;
+ enum lttng_error_code status;
assert(channel);
trace_kernel_destroy_event(event);
}
+ /* For each context in the channel list */
+ cds_list_for_each_entry_safe(ctx, ctmp, &channel->ctx_list, list) {
+ trace_kernel_destroy_context(ctx);
+ }
+
/* Remove from channel list */
cds_list_del(&channel->list);
+ if (notification_thread_handle
+ && channel->published_to_notification_thread) {
+ status = notification_thread_command_remove_channel(
+ notification_thread_handle,
+ channel->key, LTTNG_DOMAIN_KERNEL);
+ assert(status == LTTNG_OK);
+ }
+ free(channel->channel->attr.extended.ptr);
free(channel->channel);
- free(channel->ctx);
free(channel);
}
cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) {
trace_kernel_destroy_channel(channel);
}
+}
+/* Free elements needed by destroy notifiers. */
+void trace_kernel_free_session(struct ltt_kernel_session *session)
+{
/* Wipe consumer output object */
- consumer_destroy_output(session->consumer);
- consumer_destroy_output(session->tmp_consumer);
+ consumer_output_put(session->consumer);
+
+ process_attr_tracker_destroy(session->tracker_pid);
+ process_attr_tracker_destroy(session->tracker_vpid);
+ process_attr_tracker_destroy(session->tracker_uid);
+ process_attr_tracker_destroy(session->tracker_vuid);
+ process_attr_tracker_destroy(session->tracker_gid);
+ process_attr_tracker_destroy(session->tracker_vgid);
free(session);
}
projects / lttng-tools.git / blobdiff