* Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* Holds LTTng per-session event registry.
+ *
+ * Dual LGPL v2.1/GPL v2 license.
*/
#include <linux/list.h>
-#include <linux/uuid.h>
#include <linux/kprobes.h>
-#include "ltt-debugfs-abi.h"
+#include "wrapper/uuid.h"
+#include "lttng-abi.h"
+
+#undef is_signed_type
+#define is_signed_type(type) (((type)(-1)) < 0)
struct ltt_channel;
struct ltt_session;
const char *string;
};
-#define __type_integer(_type, _byte_order, _base) \
+#define __type_integer(_type, _byte_order, _base, _encoding) \
{ \
.atype = atype_integer, \
.u.basic.integer = \
.signedness = is_signed_type(_type), \
.reverse_byte_order = _byte_order != __BYTE_ORDER, \
.base = _base, \
- .encoding = lttng_encode_none, \
+ .encoding = lttng_encode_##_encoding, \
}, \
} \
struct lttng_integer_type {
unsigned int size; /* in bits */
unsigned short alignment; /* in bits */
- unsigned int signedness:1;
- unsigned int reverse_byte_order:1;
+ unsigned int signedness:1,
+ reverse_byte_order:1;
unsigned int base; /* 2, 8, 10, 16, for pretty print */
enum lttng_string_encodings encoding;
};
struct lttng_type type;
};
+/*
+ * We need to keep this perf counter field separately from struct
+ * lttng_ctx_field because cpu hotplug needs fixed-location addresses.
+ */
+struct lttng_perf_counter_field {
+ struct notifier_block nb;
+ int hp_enable;
+ struct perf_event_attr *attr;
+ struct perf_event **e; /* per-cpu array */
+};
+
struct lttng_ctx_field {
- const char *name;
- struct lttng_type type;
- void *callback;
+ struct lttng_event_field event_field;
+ size_t (*get_size)(size_t offset);
+ void (*record)(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct ltt_channel *chan);
union {
- struct {
- struct perf_event **e; /* per-cpu array */
- struct list_head head;
- struct perf_event_attr *attr;
- } perf_counter;
+ struct lttng_perf_counter_field *perf_counter;
} u;
+ void (*destroy)(struct lttng_ctx_field *field);
};
struct lttng_ctx {
const struct lttng_event_ctx *ctx; /* context */
const struct lttng_event_field *fields; /* event payload */
unsigned int nr_fields;
+ struct module *owner;
};
struct lttng_probe_desc {
- const struct lttng_event_desc *event_desc;
+ const struct lttng_event_desc **event_desc;
unsigned int nr_events;
struct list_head head; /* chain registered probes */
};
+struct lttng_krp; /* Kretprobe handling */
+
/*
* ltt_event structure is referred to by the tracing fast path. It must be
* kept small.
struct ltt_event {
unsigned int id;
struct ltt_channel *chan;
+ int enabled;
const struct lttng_event_desc *desc;
void *filter;
+ struct lttng_ctx *ctx;
enum lttng_kernel_instrumentation instrumentation;
union {
struct {
struct kprobe kp;
char *symbol_name;
} kprobe;
+ struct {
+ struct lttng_krp *lttng_krp;
+ char *symbol_name;
+ } kretprobe;
struct {
char *symbol_name;
} ftrace;
} u;
struct list_head list; /* Event list */
- int metadata_dumped:1;
+ unsigned int metadata_dumped:1;
};
struct ltt_channel_ops {
unsigned int read_timer_interval);
void (*channel_destroy)(struct channel *chan);
struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan);
+ int (*buffer_has_read_closed_stream)(struct channel *chan);
void (*buffer_read_close)(struct lib_ring_buffer *buf);
int (*event_reserve)(struct lib_ring_buffer_ctx *ctx,
- uint16_t event_id);
+ uint32_t event_id);
void (*event_commit)(struct lib_ring_buffer_ctx *ctx);
void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src,
size_t len);
+ void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx,
+ const void *src, size_t len);
+ void (*event_memset)(struct lib_ring_buffer_ctx *ctx,
+ int c, size_t len);
/*
* packet_avail_size returns the available size in the current
* packet. Note that the size returned is only a hint, since it
* may change due to concurrent writes.
*/
size_t (*packet_avail_size)(struct channel *chan);
- wait_queue_head_t *(*get_reader_wait_queue)(struct ltt_channel *chan);
+ wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu);
+ wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan);
+ int (*is_finalized)(struct channel *chan);
+ int (*is_disabled)(struct channel *chan);
+};
+
+struct ltt_transport {
+ char *name;
+ struct module *owner;
+ struct list_head node;
+ struct ltt_channel_ops ops;
};
struct ltt_channel {
unsigned int id;
struct channel *chan; /* Channel buffers */
+ int enabled;
+ struct lttng_ctx *ctx;
/* Event ID management */
struct ltt_session *session;
struct file *file; /* File associated to channel */
unsigned int free_event_id; /* Next event ID to allocate */
struct list_head list; /* Channel list */
- wait_queue_head_t notify_wait; /* Channel addition notif. waitqueue */
struct ltt_channel_ops *ops;
+ struct ltt_transport *transport;
+ struct ltt_event **sc_table; /* for syscall tracing */
+ struct ltt_event **compat_sc_table;
+ struct ltt_event *sc_unknown; /* for unknown syscalls */
+ struct ltt_event *sc_compat_unknown;
+ struct ltt_event *sc_exit; /* for syscall exit */
int header_type; /* 0: unset, 1: compact, 2: large */
- int metadata_dumped:1;
+ unsigned int metadata_dumped:1;
};
struct ltt_session {
int active; /* Is trace session active ? */
+ int been_active; /* Has trace session been active ? */
struct file *file; /* File associated to session */
struct ltt_channel *metadata; /* Metadata channel */
struct list_head chan; /* Channel list head */
struct list_head list; /* Session list */
unsigned int free_chan_id; /* Next chan ID to allocate */
uuid_le uuid; /* Trace session unique ID */
- int metadata_dumped:1;
-};
-
-struct ltt_transport {
- char *name;
- struct module *owner;
- struct list_head node;
- struct ltt_channel_ops ops;
+ unsigned int metadata_dumped:1;
};
struct ltt_session *ltt_session_create(void);
-int ltt_session_start(struct ltt_session *session);
-int ltt_session_stop(struct ltt_session *session);
+int ltt_session_enable(struct ltt_session *session);
+int ltt_session_disable(struct ltt_session *session);
void ltt_session_destroy(struct ltt_session *session);
struct ltt_channel *ltt_channel_create(struct ltt_session *session,
struct ltt_event *ltt_event_create(struct ltt_channel *chan,
struct lttng_kernel_event *event_param,
- void *filter);
+ void *filter,
+ const struct lttng_event_desc *internal_desc);
+
+int ltt_channel_enable(struct ltt_channel *channel);
+int ltt_channel_disable(struct ltt_channel *channel);
+int ltt_event_enable(struct ltt_event *event);
+int ltt_event_disable(struct ltt_event *event);
void ltt_transport_register(struct ltt_transport *transport);
void ltt_transport_unregister(struct ltt_transport *transport);
-int ltt_debugfs_abi_init(void);
-void ltt_debugfs_abi_exit(void);
+void synchronize_trace(void);
+int lttng_abi_init(void);
+void lttng_abi_exit(void);
int ltt_probe_register(struct lttng_probe_desc *desc);
void ltt_probe_unregister(struct lttng_probe_desc *desc);
int ltt_probes_init(void);
void ltt_probes_exit(void);
+#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
+int lttng_syscalls_register(struct ltt_channel *chan, void *filter);
+int lttng_syscalls_unregister(struct ltt_channel *chan);
+#else
+static inline int lttng_syscalls_register(struct ltt_channel *chan, void *filter)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscalls_unregister(struct ltt_channel *chan)
+{
+ return 0;
+}
+#endif
+
+struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx);
+int lttng_find_context(struct lttng_ctx *ctx, const char *name);
+void lttng_remove_context_field(struct lttng_ctx **ctx,
+ struct lttng_ctx_field *field);
+void lttng_destroy_context(struct lttng_ctx *ctx);
+int lttng_add_pid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_procname_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_prio_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_nice_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_tid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx);
+#if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
+int lttng_add_perf_counter_to_ctx(uint32_t type,
+ uint64_t config,
+ const char *name,
+ struct lttng_ctx **ctx);
+#else
+static inline
+int lttng_add_perf_counter_to_ctx(uint32_t type,
+ uint64_t config,
+ const char *name,
+ struct lttng_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
#ifdef CONFIG_KPROBES
int lttng_kprobes_register(const char *name,
const char *symbol_name,
uint64_t addr,
struct ltt_event *event);
void lttng_kprobes_unregister(struct ltt_event *event);
+void lttng_kprobes_destroy_private(struct ltt_event *event);
#else
static inline
int lttng_kprobes_register(const char *name,
void lttng_kprobes_unregister(struct ltt_event *event)
{
}
+
+static inline
+void lttng_kprobes_destroy_private(struct ltt_event *event)
+{
+}
+#endif
+
+#ifdef CONFIG_KRETPROBES
+int lttng_kretprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct ltt_event *event_entry,
+ struct ltt_event *event_exit);
+void lttng_kretprobes_unregister(struct ltt_event *event);
+void lttng_kretprobes_destroy_private(struct ltt_event *event);
+#else
+static inline
+int lttng_kretprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct ltt_event *event_entry,
+ struct ltt_event *event_exit)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_kretprobes_unregister(struct ltt_event *event)
+{
+}
+
+static inline
+void lttng_kretprobes_destroy_private(struct ltt_event *event)
+{
+}
#endif
#ifdef CONFIG_DYNAMIC_FTRACE
const char *symbol_name,
struct ltt_event *event);
void lttng_ftrace_unregister(struct ltt_event *event);
+void lttng_ftrace_destroy_private(struct ltt_event *event);
#else
static inline
int lttng_ftrace_register(const char *name,
void lttng_ftrace_unregister(struct ltt_event *event)
{
}
+
+static inline
+void lttng_ftrace_destroy_private(struct ltt_event *event)
+{
+}
#endif
+
+int lttng_calibrate(struct lttng_kernel_calibrate *calibrate);
+
+extern const struct file_operations lttng_tracepoint_list_fops;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
+#define TRACEPOINT_HAS_DATA_ARG
+#endif
+
#endif /* _LTT_EVENTS_H */
projects / lttng-modules.git / blobdiff