#ifndef _LTTNG_EVENTS_H
#define _LTTNG_EVENTS_H
+#include <linux/irq_work.h>
#include <linux/version.h>
#include <linux/list.h>
#include <linux/kprobes.h>
struct lttng_probe_ctx {
struct lttng_event *event;
+ struct lttng_event_notifier *event_notifier; // Not sure if we will ever need it.
uint8_t interruptible;
};
const struct lttng_event_field *fields; /* event payload */
unsigned int nr_fields;
struct module *owner;
+ void *event_notifier_callback;
};
struct lttng_probe_desc {
const char *filter_stack_data);
int link_failed;
struct list_head node; /* list of bytecode runtime in event */
- struct lttng_event *event;
+ struct lttng_ctx *ctx;
};
/*
struct list_head node;
};
+struct lttng_kprobe {
+ struct kprobe kp;
+ char *symbol_name;
+};
+
enum lttng_syscall_entryexit {
LTTNG_SYSCALL_ENTRY,
LTTNG_SYSCALL_EXIT,
struct lttng_ctx *ctx;
enum lttng_kernel_instrumentation instrumentation;
union {
- struct {
- struct kprobe kp;
- char *symbol_name;
- } kprobe;
+ struct lttng_kprobe kprobe;
struct {
struct lttng_krp *lttng_krp;
char *symbol_name;
int has_enablers_without_bytecode;
};
+// FIXME: Really similar to lttng_event above. Could those be merged ?
+struct lttng_event_notifier {
+ enum lttng_event_type evtype; /* First field. */
+ uint64_t user_token;
+ int enabled;
+ int registered; /* has reg'd tracepoint probe */
+ const struct lttng_event_desc *desc;
+ void *filter;
+ struct list_head list; /* event_notifier list in event_notifier group */
+
+ enum lttng_kernel_instrumentation instrumentation;
+ union {
+ } u;
+
+ /* Backward references: list of lttng_enabler_ref (ref to enablers) */
+ struct list_head enablers_ref_head;
+ struct hlist_node hlist; /* session ht of event_notifiers */
+ /* list of struct lttng_bytecode_runtime, sorted by seqnum */
+ struct list_head bytecode_runtime_head;
+ int has_enablers_without_bytecode;
+
+ void (*send_notification)(struct lttng_event_notifier *event_notifier);
+ struct lttng_event_notifier_group *group; /* Weak ref */
+};
+
enum lttng_enabler_format_type {
LTTNG_ENABLER_FORMAT_STAR_GLOB,
LTTNG_ENABLER_FORMAT_NAME,
enum lttng_enabler_format_type format_type;
- struct list_head node; /* per-session list of enablers */
/* head list of struct lttng_ust_filter_bytecode_node */
struct list_head filter_bytecode_head;
struct lttng_kernel_event event_param;
+ unsigned int enabled:1;
+
+ uint64_t user_token; /* User-provided token. */
+};
+
+struct lttng_event_enabler {
+ struct lttng_enabler base;
+ struct list_head node; /* per-session list of enablers */
struct lttng_channel *chan;
+ /*
+ * Unused, but kept around to make it explicit that the tracer can do
+ * it.
+ */
struct lttng_ctx *ctx;
- unsigned int enabled:1;
};
+struct lttng_event_notifier_enabler {
+ struct lttng_enabler base;
+ struct list_head node; /* List of event_notifier enablers */
+ struct lttng_event_notifier_group *group;
+};
+
+static inline
+struct lttng_enabler *lttng_event_enabler_as_enabler(
+ struct lttng_event_enabler *event_enabler)
+{
+ return &event_enabler->base;
+}
+
+static inline
+struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
+ struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ return &event_notifier_enabler->base;
+}
+
struct lttng_channel_ops {
struct channel *(*channel_create)(const char *name,
- struct lttng_channel *lttng_chan,
+ void *priv,
void *buf_addr,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
struct hlist_head table[LTTNG_EVENT_HT_SIZE];
};
+#define LTTNG_EVENT_NOTIFIER_HT_BITS 12
+#define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
+
+struct lttng_event_notifier_ht {
+ struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE];
+};
+
struct lttng_channel {
unsigned int id;
struct channel *chan; /* Channel buffers */
struct lttng_id_tracker vgid_tracker;
unsigned int metadata_dumped:1,
tstate:1; /* Transient enable state */
- /* List of enablers */
+ /* List of event enablers */
struct list_head enablers_head;
/* Hash table of events */
struct lttng_event_ht events_ht;
char creation_time[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
};
+struct lttng_event_notifier_group {
+ struct file *file; /* File associated to event notifier group */
+ struct file *notif_file; /* File used to expose notifications to userspace. */
+ struct list_head node; /* event notifier group list */
+ struct list_head enablers_head; /* List of enablers */
+ struct list_head event_notifiers_head; /* List of event notifier */
+ struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */
+ struct lttng_ctx *ctx; /* Contexts for filters. */
+ struct lttng_channel_ops *ops;
+ struct lttng_transport *transport;
+ struct channel *chan; /* Ring buffer channel for event notifier group. */
+ struct lib_ring_buffer *buf; /* Ring buffer for event notifier group. */
+ wait_queue_head_t read_wait;
+ struct irq_work wakeup_pending; /* Pending wakeup irq work. */
+};
+
struct lttng_metadata_cache {
char *data; /* Metadata cache */
unsigned int cache_alloc; /* Metadata allocated size (bytes) */
struct list_head *lttng_get_probe_list_head(void);
-struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_format_type format_type,
+struct lttng_event_enabler *lttng_event_enabler_create(
+ enum lttng_enabler_format_type format_type,
struct lttng_kernel_event *event_param,
struct lttng_channel *chan);
-int lttng_enabler_enable(struct lttng_enabler *enabler);
-int lttng_enabler_disable(struct lttng_enabler *enabler);
+int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler);
+int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler);
+struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
+ struct lttng_event_notifier_group *event_notifier_group,
+ enum lttng_enabler_format_type format_type,
+ struct lttng_kernel_event_notifier *event_notifier_param);
+
+int lttng_event_notifier_enabler_enable(
+ struct lttng_event_notifier_enabler *event_notifier_enabler);
+int lttng_event_notifier_enabler_disable(
+ struct lttng_event_notifier_enabler *event_notifier_enabler);
int lttng_fix_pending_events(void);
+int lttng_fix_pending_event_notifiers(void);
int lttng_session_active(void);
+bool lttng_event_notifier_active(void);
struct lttng_session *lttng_session_create(void);
int lttng_session_enable(struct lttng_session *session);
int lttng_session_statedump(struct lttng_session *session);
void metadata_cache_destroy(struct kref *kref);
+struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
+void lttng_event_notifier_group_destroy(
+ struct lttng_event_notifier_group *event_notifier_group);
+
struct lttng_channel *lttng_channel_create(struct lttng_session *session,
const char *transport_name,
void *buf_addr,
void *filter,
const struct lttng_event_desc *internal_desc);
+struct lttng_event_notifier *lttng_event_notifier_create(
+ const struct lttng_event_desc *event_notifier_desc,
+ uint64_t id,
+ struct lttng_event_notifier_group *event_notifier_group,
+ struct lttng_kernel_event_notifier *event_notifier_param,
+ void *filter,
+ enum lttng_kernel_instrumentation itype);
+struct lttng_event_notifier *_lttng_event_notifier_create(
+ const struct lttng_event_desc *event_notifier_desc,
+ uint64_t id,
+ struct lttng_event_notifier_group *event_notifier_group,
+ struct lttng_kernel_event_notifier *event_notifier_param,
+ void *filter,
+ enum lttng_kernel_instrumentation itype);
+
int lttng_channel_enable(struct lttng_channel *channel);
int lttng_channel_disable(struct lttng_channel *channel);
int lttng_event_enable(struct lttng_event *event);
int lttng_probe_register(struct lttng_probe_desc *desc);
void lttng_probe_unregister(struct lttng_probe_desc *desc);
-const struct lttng_event_desc *lttng_event_get(const char *name);
-void lttng_event_put(const struct lttng_event_desc *desc);
+const struct lttng_event_desc *lttng_event_desc_get(const char *name);
+void lttng_event_desc_put(const struct lttng_event_desc *desc);
int lttng_probes_init(void);
void lttng_probes_exit(void);
{
return -ENOSYS;
}
+
#endif
void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime);
-int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler,
+int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler *event_enabler,
+ struct lttng_kernel_filter_bytecode __user *bytecode);
+int lttng_event_notifier_enabler_attach_bytecode(
+ struct lttng_event_notifier_enabler *event_notifier_enabler,
struct lttng_kernel_filter_bytecode __user *bytecode);
-void lttng_enabler_event_link_bytecode(struct lttng_event *event,
+
+void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
+ struct lttng_ctx *ctx,
+ struct list_head *bytecode_runtime_head,
struct lttng_enabler *enabler);
int lttng_probes_init(void);
extern int lttng_statedump_start(struct lttng_session *session);
#ifdef CONFIG_KPROBES
-int lttng_kprobes_register(const char *name,
+int lttng_kprobes_register_event(const char *name,
const char *symbol_name,
uint64_t offset,
uint64_t addr,
struct lttng_event *event);
-void lttng_kprobes_unregister(struct lttng_event *event);
-void lttng_kprobes_destroy_private(struct lttng_event *event);
+void lttng_kprobes_unregister_event(struct lttng_event *event);
+void lttng_kprobes_destroy_event_private(struct lttng_event *event);
#else
static inline
-int lttng_kprobes_register(const char *name,
+int lttng_kprobes_register_event(const char *name,
const char *symbol_name,
uint64_t offset,
uint64_t addr,
}
static inline
-void lttng_kprobes_unregister(struct lttng_event *event)
+void lttng_kprobes_unregister_event(struct lttng_event *event)
+{
+}
+
+static inline
+void lttng_kprobes_destroy_event_private(struct lttng_event *event)
{
}
projects / lttng-modules.git / blobdiff