Save filter expression as part of agent events and save them

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

diff --git a/src/bin/lttng-sessiond/trace-ust.h b/src/bin/lttng-sessiond/trace-ust.h
index d58e37121696e3a4fda50fe0990316de7950229b..b1b200f1d188d6e20b4c28c006bc178467cd5e9a 100644 (file)
--- a/src/bin/lttng-sessiond/trace-ust.h
+++ b/src/bin/lttng-sessiond/trace-ust.h
@@ -27,9 +27,10 @@
 #include <common/defaults.h>
 
 #include "consumer.h"
-#include "agent.h"
 #include "ust-ctl.h"
 
+struct agent;
+
 struct ltt_ust_ht_key {
        const char *name;
        const struct lttng_filter_bytecode *filter;
@@ -50,14 +51,26 @@ struct ltt_ust_event {
        struct lttng_ust_event attr;
        struct lttng_ht_node_str node;
        char *filter_expression;
-       struct lttng_ust_filter_bytecode *filter;
+       struct lttng_filter_bytecode *filter;
        struct lttng_event_exclusion *exclusion;
+       /*
+        * An internal event is an event which was created by the session daemon
+        * through which, for example, events emitted in Agent domains are
+        * "funelled". This is used to hide internal events from external
+        * clients as they should never be modified by the external world.
+        */
+       bool internal;
 };
 
 /* UST channel */
 struct ltt_ust_channel {
        uint64_t id;    /* unique id per session. */
        unsigned int enabled;
+       /*
+        * A UST channel can be part of a userspace sub-domain such as JUL,
+        * Log4j, Python.
+        */
+       enum lttng_domain_type domain;
        char name[LTTNG_UST_SYM_NAME_LEN];
        struct lttng_ust_channel_attr attr;
        struct lttng_ht *ctx;
@@ -74,11 +87,20 @@ struct ltt_ust_domain_global {
        struct cds_list_head registry_buffer_uid_list;
 };
 
+struct ust_pid_tracker_node {
+       struct lttng_ht_node_ulong node;
+};
+
+struct ust_pid_tracker {
+       struct lttng_ht *ht;
+};
+
 /* UST session */
 struct ltt_ust_session {
        uint64_t id;    /* Unique identifier of session */
        struct ltt_ust_domain_global domain_global;
-       struct agent agent;
+       /* Hash table of agent indexed by agent domain. */
+       struct lttng_ht *agents;
        /* UID/GID of the user owning the session */
        uid_t uid;
        gid_t gid;
@@ -112,6 +134,14 @@ struct ltt_ust_session {
 
        /* Metadata channel attributes. */
        struct lttng_ust_channel_attr metadata_attr;
+
+       /*
+        * Path where to keep the shared memory files.
+        */
+       char root_shm_path[PATH_MAX];
+       char shm_path[PATH_MAX];
+
+       struct ust_pid_tracker pid_tracker;
 };
 
 /*
@@ -157,16 +187,20 @@ struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht,
                struct lttng_event_exclusion *exclusion);
 struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht,
                char *name);
+struct agent *trace_ust_find_agent(struct ltt_ust_session *session,
+               enum lttng_domain_type domain_type);
 
 /*
  * Create functions malloc() the data structure.
  */
 struct ltt_ust_session *trace_ust_create_session(uint64_t session_id);
-struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr);
+struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
+               enum lttng_domain_type domain);
 struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev,
                char *filter_expression,
                struct lttng_filter_bytecode *filter,
-               struct lttng_event_exclusion *exclusion);
+               struct lttng_event_exclusion *exclusion,
+               bool internal_event);
 struct ltt_ust_context *trace_ust_create_context(
                struct lttng_event_context *ctx);
 int trace_ust_match_context(struct ltt_ust_context *uctx,
@@ -182,6 +216,14 @@ void trace_ust_destroy_session(struct ltt_ust_session *session);
 void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
 void trace_ust_destroy_event(struct ltt_ust_event *event);
 
+int trace_ust_track_pid(struct ltt_ust_session *session, int pid);
+int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid);
+
+int trace_ust_pid_tracker_lookup(struct ltt_ust_session *session, int pid);
+
+ssize_t trace_ust_list_tracker_pids(struct ltt_ust_session *session,
+               int32_t **_pids);
+
 #else /* HAVE_LIBLTTNG_UST_CTL */
 
 static inline int trace_ust_ht_match_event(struct cds_lfht_node *node,
@@ -207,7 +249,8 @@ struct ltt_ust_session *trace_ust_create_session(unsigned int session_id)
        return NULL;
 }
 static inline
-struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr)
+struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
+               enum lttng_domain_type domain)
 {
        return NULL;
 }
@@ -215,7 +258,8 @@ static inline
 struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev,
                const char *filter_expression,
                struct lttng_filter_bytecode *filter,
-               struct lttng_event_exclusion *exclusion)
+               struct lttng_event_exclusion *exclusion,
+               bool internal_event)
 {
        return NULL;
 }
@@ -257,7 +301,33 @@ void trace_ust_delete_channel(struct lttng_ht *ht,
 {
        return;
 }
-
+static inline
+struct agent *trace_ust_find_agent(struct ltt_ust_session *session,
+               enum lttng_domain_type domain_type)
+{
+       return NULL;
+}
+static inline
+int trace_ust_track_pid(struct ltt_ust_session *session, int pid)
+{
+       return 0;
+}
+static inline
+int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid)
+{
+       return 0;
+}
+static inline
+int trace_ust_pid_tracker_lookup(struct ltt_ust_session *session, int pid)
+{
+       return 0;
+}
+static inline
+ssize_t trace_ust_list_tracker_pids(struct ltt_ust_session *session,
+               int32_t **_pids)
+{
+       return -1;
+}
 #endif /* HAVE_LIBLTTNG_UST_CTL */
 
 #endif /* _LTT_TRACE_UST_H */