#include <linux/kprobes.h>
#include <linux/kref.h>
#include <linux/uuid.h>
+#include <linux/irq_work.h>
#include <wrapper/uprobes.h>
#include <lttng/cpuhotplug.h>
#include <lttng/tracer.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 {
};
struct lttng_uprobe_handler {
- struct lttng_event *event;
+ union {
+ struct lttng_event *event;
+ struct lttng_event_notifier *event_notifier;
+ } u;
loff_t offset;
struct uprobe_consumer up_consumer;
struct list_head node;
};
+struct lttng_kprobe {
+ struct kprobe kp;
+ char *symbol_name;
+};
+
+struct lttng_uprobe {
+ struct inode *inode;
+ struct list_head head;
+};
+
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;
} kretprobe;
+ struct lttng_uprobe uprobe;
struct {
- struct inode *inode;
- struct list_head head;
- } uprobe;
- struct {
- char *syscall_name;
enum lttng_syscall_entryexit entryexit;
enum lttng_syscall_abi abi;
} syscall;
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 {
+ struct lttng_kprobe kprobe;
+ struct lttng_uprobe uprobe;
+ } 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,
struct lttng_kernel_event event_param;
unsigned int enabled:1;
+
+ uint64_t user_token; /* User-provided token. */
};
struct lttng_event_enabler {
struct lttng_ctx *ctx;
};
+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 */
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) */
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_event_disable(struct lttng_event *event);
+int lttng_event_notifier_enable(struct lttng_event_notifier *event_notifier);
+int lttng_event_notifier_disable(struct lttng_event_notifier *event_notifier);
+
void lttng_transport_register(struct lttng_transport *transport);
void lttng_transport_unregister(struct lttng_transport *transport);
void lttng_clock_unref(void);
#if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
-int lttng_syscalls_register(struct lttng_channel *chan, void *filter);
-int lttng_syscalls_unregister(struct lttng_channel *chan);
-int lttng_syscalls_destroy(struct lttng_channel *chan);
-int lttng_syscall_filter_enable(struct lttng_channel *chan,
+int lttng_syscalls_register_event(struct lttng_channel *chan, void *filter);
+int lttng_syscalls_unregister_event(struct lttng_channel *chan);
+int lttng_syscalls_destroy_event(struct lttng_channel *chan);
+int lttng_syscall_filter_enable_event(
+ struct lttng_channel *chan,
struct lttng_event *event);
-int lttng_syscall_filter_disable(struct lttng_channel *chan,
+int lttng_syscall_filter_disable_event(
+ struct lttng_channel *chan,
struct lttng_event *event);
+
long lttng_channel_syscall_mask(struct lttng_channel *channel,
struct lttng_kernel_syscall_mask __user *usyscall_mask);
+
#else
-static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
+static inline int lttng_syscalls_register_event(
+ struct lttng_channel *chan, void *filter)
{
return -ENOSYS;
}
-static inline int lttng_syscalls_unregister(struct lttng_channel *chan)
+static inline int lttng_syscalls_unregister_event(struct lttng_channel *chan)
{
return 0;
}
return 0;
}
-static inline int lttng_syscall_filter_enable(struct lttng_channel *chan,
+static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan,
struct lttng_event *event);
{
return -ENOSYS;
}
-static inline int lttng_syscall_filter_disable(struct lttng_channel *chan,
+static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan,
struct lttng_event *event);
{
return -ENOSYS;
{
return -ENOSYS;
}
+
#endif
void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime);
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_link_bytecode(const struct lttng_event_desc *event_desc,
struct lttng_ctx *ctx,
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);
+int lttng_kprobes_register_event_notifier(const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_event_notifier *event_notifier);
+void lttng_kprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier);
+void lttng_kprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier);
#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)
+{
+}
+
+static inline
+int lttng_kprobes_register_event_notifier(const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_event_notifier *event_notifier)
{
+ return -ENOSYS;
}
static inline
-void lttng_kprobes_destroy_private(struct lttng_event *event)
+void lttng_kprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier)
+{
+}
+
+static inline
+void lttng_kprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier)
{
}
#endif
int lttng_event_add_callsite(struct lttng_event *event,
struct lttng_kernel_event_callsite *callsite);
+int lttng_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier,
+ struct lttng_kernel_event_callsite *callsite);
+
#ifdef CONFIG_UPROBES
-int lttng_uprobes_register(const char *name,
+int lttng_uprobes_register_event(const char *name,
int fd, struct lttng_event *event);
-int lttng_uprobes_add_callsite(struct lttng_event *event,
+int lttng_uprobes_event_add_callsite(struct lttng_event *event,
struct lttng_kernel_event_callsite *callsite);
-void lttng_uprobes_unregister(struct lttng_event *event);
-void lttng_uprobes_destroy_private(struct lttng_event *event);
+void lttng_uprobes_unregister_event(struct lttng_event *event);
+void lttng_uprobes_destroy_event_private(struct lttng_event *event);
+int lttng_uprobes_register_event_notifier(const char *name,
+ int fd, struct lttng_event_notifier *event_notifier);
+int lttng_uprobes_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier,
+ struct lttng_kernel_event_callsite *callsite);
+void lttng_uprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier);
+void lttng_uprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier);
#else
static inline
-int lttng_uprobes_register(const char *name,
+int lttng_uprobes_register_event(const char *name,
int fd, struct lttng_event *event)
{
return -ENOSYS;
}
static inline
-int lttng_uprobes_add_callsite(struct lttng_event *event,
+int lttng_uprobes_event_add_callsite(struct lttng_event *event,
+ struct lttng_kernel_event_callsite *callsite)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_uprobes_unregister_event(struct lttng_event *event)
+{
+}
+
+static inline
+void lttng_uprobes_destroy_event_private(struct lttng_event *event)
+{
+}
+
+static inline
+int lttng_uprobes_register_event_notifier(const char *name,
+ int fd, struct lttng_event_notifier *event_notifier)
+{
+ return -ENOSYS;
+}
+
+static inline
+int lttng_uprobes_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier,
struct lttng_kernel_event_callsite *callsite)
{
return -ENOSYS;
}
static inline
-void lttng_uprobes_unregister(struct lttng_event *event)
+void lttng_uprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier)
{
}
static inline
-void lttng_uprobes_destroy_private(struct lttng_event *event)
+void lttng_uprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier)
{
}
#endif