SoW-2019-0002: Dynamic Snapshot

[lttng-tools.git] / src / bin / lttng-sessiond / trace-kernel.h

diff --git a/src/bin/lttng-sessiond/trace-kernel.h b/src/bin/lttng-sessiond/trace-kernel.h
index 0ac020f97d63b4d00d599ec2ee2597a8bbe44d2f..88e356854dd23217bb5c266f2199f61ad90a1eaa 100644 (file)
--- a/src/bin/lttng-sessiond/trace-kernel.h
+++ b/src/bin/lttng-sessiond/trace-kernel.h
@@ -1,18 +1,8 @@
 /*
- * 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.
  */
 
 #ifndef _LTT_TRACE_KERNEL_H
@@ -26,12 +16,18 @@
 #include <common/defaults.h>
 
 #include "consumer.h"
+#include "tracker.h"
 
 /* Kernel event list */
 struct ltt_kernel_event_list {
        struct cds_list_head head;
 };
 
+/* Kernel event rule token list */
+struct ltt_kernel_token_event_rule_list {
+       struct cds_list_head head;
+};
+
 /* Channel stream list */
 struct ltt_kernel_stream_list {
        struct cds_list_head head;
@@ -45,6 +41,8 @@ struct ltt_kernel_channel_list {
 struct ltt_kernel_context {
        struct lttng_kernel_context ctx;
        struct cds_list_head list;
+       /* Indicates whether or not the context is in a list. */
+       bool in_list;
 };
 
 /* Kernel event */
@@ -56,11 +54,25 @@ struct ltt_kernel_event {
        struct cds_list_head list;
        char *filter_expression;
        struct lttng_filter_bytecode *filter;
+       struct lttng_userspace_probe_location *userspace_probe_location;
+};
+
+/* Kernel event */
+struct ltt_kernel_token_event_rule {
+       int fd;
+       int enabled;
+       enum lttng_event_type type;
+       struct lttng_event_rule *event_rule;
+       struct cds_list_head list;
+       uint64_t token;
+       const struct lttng_filter_bytecode *filter;
+       struct lttng_userspace_probe_location *userspace_probe_location;
 };
 
 /* Kernel channel */
 struct ltt_kernel_channel {
        int fd;
+       uint64_t key; /* Key to reference this channel with the consumer. */
        int enabled;
        unsigned int stream_count;
        unsigned int event_count;
@@ -78,6 +90,7 @@ struct ltt_kernel_channel {
 /* Metadata */
 struct ltt_kernel_metadata {
        int fd;
+       uint64_t key; /* Key to reference this channel with the consumer. */
        struct lttng_channel *conf;
 };
 
@@ -115,6 +128,15 @@ struct ltt_kernel_session {
        unsigned int output_traces;
        unsigned int snapshot_mode;
        unsigned int has_non_default_channel;
+       /* Current trace chunk of the ltt_session. */
+       struct lttng_trace_chunk *current_trace_chunk;
+       /* Tracker lists */
+       struct lttng_tracker_list *tracker_list_pid;
+       struct lttng_tracker_list *tracker_list_vpid;
+       struct lttng_tracker_list *tracker_list_uid;
+       struct lttng_tracker_list *tracker_list_vuid;
+       struct lttng_tracker_list *tracker_list_gid;
+       struct lttng_tracker_list *tracker_list_vgid;
 };
 
 /*
@@ -128,7 +150,11 @@ struct ltt_kernel_event *trace_kernel_find_event(
                enum lttng_event_type type,
                struct lttng_filter_bytecode *filter);
 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_token_event_rule *trace_kernel_find_trigger_by_token(
+               struct ltt_kernel_token_event_rule_list *list,
+               uint64_t token);
 
 /*
  * Create functions malloc() the data structure.
@@ -136,15 +162,22 @@ struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
 struct ltt_kernel_session *trace_kernel_create_session(void);
 struct ltt_kernel_channel *trace_kernel_create_channel(
                struct lttng_channel *chan);
-struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev,
-               char *filter_expression, struct lttng_filter_bytecode *filter);
+enum lttng_error_code trace_kernel_create_event(struct lttng_event *ev,
+               char *filter_expression, struct lttng_filter_bytecode *filter,
+               struct ltt_kernel_event **kernel_event);
 struct ltt_kernel_metadata *trace_kernel_create_metadata(void);
 struct ltt_kernel_stream *trace_kernel_create_stream(const char *name,
                unsigned int count);
 struct ltt_kernel_context *trace_kernel_create_context(
                struct lttng_kernel_context *ctx);
+enum lttng_error_code trace_kernel_create_token_event_rule(
+               struct lttng_event_rule *event_rule,
+               uint64_t token,
+               struct ltt_kernel_token_event_rule **kernel_token_event_rule);
 struct ltt_kernel_context *trace_kernel_copy_context(
                struct ltt_kernel_context *ctx);
+enum lttng_error_code trace_kernel_init_trigger_from_event_rule(const struct lttng_event_rule *rule,
+               struct lttng_kernel_trigger *kernel_trigger);
 
 /*
  * Destroy functions free() the data structure and remove from linked list if
@@ -156,5 +189,7 @@ void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
 void trace_kernel_destroy_event(struct ltt_kernel_event *event);
 void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);
 void trace_kernel_destroy_context(struct ltt_kernel_context *ctx);
+void trace_kernel_destroy_token_event_rule(struct ltt_kernel_token_event_rule *rule);
+void trace_kernel_free_session(struct ltt_kernel_session *session);
 
 #endif /* _LTT_TRACE_KERNEL_H */