Add extra version information framework

[deliverable/lttng-modules.git] / lttng-events.h

diff --git a/lttng-events.h b/lttng-events.h
index 9e05e2f9a56b044c8c690fbbc2ac75a3889d2c58..c3f23a5e69ab346318082f6704177e8161451db7 100644 (file)
--- a/lttng-events.h
+++ b/lttng-events.h
@@ -27,6 +27,7 @@
 #include <linux/list.h>
 #include <linux/kprobes.h>
 #include <linux/kref.h>
+#include <lttng-cpuhotplug.h>
 #include <wrapper/uuid.h>
 #include <lttng-tracer.h>
 #include <lttng-abi.h>
@@ -77,6 +78,9 @@ struct lttng_enum_value {
 struct lttng_enum_entry {
        struct lttng_enum_value start, end;     /* start and end are inclusive */
        const char *string;
+       struct {
+               unsigned int is_auto:1;
+       } options;
 };
 
 #define __type_integer(_type, _size, _alignment, _signedness,  \
@@ -181,8 +185,13 @@ union lttng_ctx_value {
  * lttng_ctx_field because cpu hotplug needs fixed-location addresses.
  */
 struct lttng_perf_counter_field {
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
+       struct lttng_cpuhp_node cpuhp_prepare;
+       struct lttng_cpuhp_node cpuhp_online;
+#else
        struct notifier_block nb;
        int hp_enable;
+#endif
        struct perf_event_attr *attr;
        struct perf_event **e;  /* per-cpu array */
 };
@@ -469,19 +478,36 @@ struct lttng_dynamic_len_stack {
 DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack);
 
 /*
- * struct lttng_pid_tracker declared in header due to deferencing of *v
+ * struct lttng_id_tracker declared in header due to deferencing of *v
  * in RCU_INITIALIZER(v).
  */
-#define LTTNG_PID_HASH_BITS    6
-#define LTTNG_PID_TABLE_SIZE   (1 << LTTNG_PID_HASH_BITS)
+#define LTTNG_ID_HASH_BITS     6
+#define LTTNG_ID_TABLE_SIZE    (1 << LTTNG_ID_HASH_BITS)
 
-struct lttng_pid_tracker {
-       struct hlist_head pid_hash[LTTNG_PID_TABLE_SIZE];
+enum tracker_type {
+       TRACKER_PID,
+       TRACKER_VPID,
+       TRACKER_UID,
+       TRACKER_VUID,
+       TRACKER_GID,
+       TRACKER_VGID,
+
+       TRACKER_UNKNOWN,
+};
+
+struct lttng_id_tracker_rcu {
+       struct hlist_head id_hash[LTTNG_ID_TABLE_SIZE];
+};
+
+struct lttng_id_tracker {
+       struct lttng_session *session;
+       enum tracker_type tracker_type;
+       struct lttng_id_tracker_rcu *p; /* RCU dereferenced. */
 };
 
-struct lttng_pid_hash_node {
+struct lttng_id_hash_node {
        struct hlist_node hlist;
-       int pid;
+       int id;
 };
 
 struct lttng_session {
@@ -494,7 +520,12 @@ struct lttng_session {
        unsigned int free_chan_id;      /* Next chan ID to allocate */
        uuid_le uuid;                   /* Trace session unique ID */
        struct lttng_metadata_cache *metadata_cache;
-       struct lttng_pid_tracker *pid_tracker;
+       struct lttng_id_tracker pid_tracker;
+       struct lttng_id_tracker vpid_tracker;
+       struct lttng_id_tracker uid_tracker;
+       struct lttng_id_tracker vuid_tracker;
+       struct lttng_id_tracker gid_tracker;
+       struct lttng_id_tracker vgid_tracker;
        unsigned int metadata_dumped:1,
                tstate:1;               /* Transient enable state */
        /* List of enablers */
@@ -589,17 +620,20 @@ void lttng_probes_exit(void);
 int lttng_metadata_output_channel(struct lttng_metadata_stream *stream,
                struct channel *chan);
 
-int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node *node);
-struct lttng_pid_tracker *lttng_pid_tracker_create(void);
-void lttng_pid_tracker_destroy(struct lttng_pid_tracker *lpf);
-bool lttng_pid_tracker_lookup(struct lttng_pid_tracker *lpf, int pid);
-int lttng_pid_tracker_add(struct lttng_pid_tracker *lpf, int pid);
-int lttng_pid_tracker_del(struct lttng_pid_tracker *lpf, int pid);
+int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node);
+int lttng_id_tracker_empty_set(struct lttng_id_tracker *lf);
+void lttng_id_tracker_destroy(struct lttng_id_tracker *lf, bool rcu);
+bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu *p, int id);
+int lttng_id_tracker_add(struct lttng_id_tracker *lf, int id);
+int lttng_id_tracker_del(struct lttng_id_tracker *lf, int id);
 
-int lttng_session_track_pid(struct lttng_session *session, int pid);
-int lttng_session_untrack_pid(struct lttng_session *session, int pid);
+int lttng_session_track_id(struct lttng_session *session,
+               enum tracker_type tracker_type, int id);
+int lttng_session_untrack_id(struct lttng_session *session,
+               enum tracker_type tracker_type, int id);
 
-int lttng_session_list_tracker_pids(struct lttng_session *session);
+int lttng_session_list_tracker_ids(struct lttng_session *session,
+               enum tracker_type tracker_type);
 
 void lttng_clock_ref(void);
 void lttng_clock_unref(void);
@@ -698,6 +732,10 @@ int lttng_add_perf_counter_to_ctx(uint32_t type,
                                  uint64_t config,
                                  const char *name,
                                  struct lttng_ctx **ctx);
+int lttng_cpuhp_perf_counter_online(unsigned int cpu,
+               struct lttng_cpuhp_node *node);
+int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
+               struct lttng_cpuhp_node *node);
 #else
 static inline
 int lttng_add_perf_counter_to_ctx(uint32_t type,
@@ -707,6 +745,18 @@ int lttng_add_perf_counter_to_ctx(uint32_t type,
 {
        return -ENOSYS;
 }
+static inline
+int lttng_cpuhp_perf_counter_online(unsigned int cpu,
+               struct lttng_cpuhp_node *node)
+{
+       return 0;
+}
+static inline
+int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
+               struct lttng_cpuhp_node *node)
+{
+       return 0;
+}
 #endif
 
 int lttng_logger_init(void);
@@ -785,7 +835,7 @@ int lttng_kretprobes_event_enable_state(struct lttng_event *event,
 }
 #endif
 
-#ifdef CONFIG_DYNAMIC_FTRACE
+#if defined(CONFIG_DYNAMIC_FTRACE) && !defined(LTTNG_FTRACE_MISSING_HEADER)
 int lttng_ftrace_register(const char *name,
                          const char *symbol_name,
                          struct lttng_event *event);