[lttng-modules.git] / include / lttng / events-internal.h

/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
 *
 * lttng/events-internal.h
 *
 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LTTNG_EVENTS_INTERNAL_H
#define _LTTNG_EVENTS_INTERNAL_H

#include <lttng/events.h>

struct lttng_kernel_event_common_private {
	struct lttng_kernel_event_common *pub;		/* Public event interface */

	const struct lttng_kernel_event_desc *desc;
	/* Backward references: list of lttng_enabler_ref (ref to enablers) */
	struct list_head enablers_ref_head;
	int registered;					/* has reg'd tracepoint probe */
	uint64_t user_token;

	int has_enablers_without_filter_bytecode;
	/* list of struct lttng_bytecode_runtime, sorted by seqnum */
	struct list_head filter_bytecode_runtime_head;
	enum lttng_kernel_abi_instrumentation instrumentation;
	/* Selected by instrumentation */
	union {
		struct lttng_kprobe kprobe;
		struct lttng_uprobe uprobe;
		struct {
			struct lttng_krp *lttng_krp;
			char *symbol_name;
		} kretprobe;
		struct {
			enum lttng_syscall_entryexit entryexit;
			enum lttng_syscall_abi abi;
			struct hlist_node node;			/* chain registered syscall event_notifier */
			unsigned int syscall_id;
		} syscall;
	} u;
};

struct lttng_kernel_event_recorder_private {
	struct lttng_kernel_event_common_private parent;

	struct lttng_kernel_event_recorder *pub;	/* Public event interface */
	struct list_head node;				/* Event recorder list */
	struct hlist_node hlist;			/* Hash table of event recorders */
	struct lttng_kernel_ctx *ctx;
	unsigned int id;
	unsigned int metadata_dumped:1;
};

struct lttng_kernel_event_notifier_private {
	struct lttng_kernel_event_common_private parent;

	struct lttng_kernel_event_notifier *pub;	/* Public event notifier interface */
	struct lttng_event_notifier_group *group;	/* weak ref */
	size_t num_captures;				/* Needed to allocate the msgpack array. */
	uint64_t error_counter_index;
	struct list_head node;				/* Event notifier list */
	struct hlist_node hlist;			/* Hash table of event notifiers */
	struct list_head capture_bytecode_runtime_head;

};

enum lttng_kernel_bytecode_interpreter_ret {
	LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1,
	LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0,
};

enum lttng_kernel_bytecode_filter_result {
	LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0,
	LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1,
};

struct lttng_kernel_bytecode_filter_ctx {
	enum lttng_kernel_bytecode_filter_result result;
};

/*
 * Enabler field, within whatever object is enabling an event. Target of
 * backward reference.
 */
struct lttng_enabler {
	enum lttng_enabler_format_type format_type;

	/* head list of struct lttng_kernel_bytecode_node */
	struct list_head filter_bytecode_head;

	struct lttng_kernel_abi_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;
};

struct lttng_event_notifier_enabler {
	struct lttng_enabler base;
	uint64_t error_counter_index;
	struct list_head node;	/* List of event_notifier enablers */
	struct lttng_event_notifier_group *group;

	/* head list of struct lttng_kernel_bytecode_node */
	struct list_head capture_bytecode_head;
	uint64_t num_captures;
};

struct lttng_ctx_value {
	union {
		int64_t s64;
		const char *str;
		double d;
	} u;
};

/*
 * We need to keep this perf counter field separately from struct
 * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
 */
struct lttng_perf_counter_field {
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_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 */
	char *name;
	struct lttng_kernel_event_field *event_field;
};

struct lttng_kernel_ctx_field {
	const struct lttng_kernel_event_field *event_field;
	size_t (*get_size)(void *priv, struct lttng_probe_ctx *probe_ctx,
			size_t offset);
	void (*record)(void *priv, struct lttng_probe_ctx *probe_ctx,
			struct lib_ring_buffer_ctx *ctx,
			struct lttng_channel *chan);
	void (*get_value)(void *priv, struct lttng_probe_ctx *probe_ctx,
			struct lttng_ctx_value *value);
	void (*destroy)(void *priv);
	void *priv;
};

struct lttng_kernel_ctx {
	struct lttng_kernel_ctx_field *fields;
	unsigned int nr_fields;
	unsigned int allocated_fields;
	size_t largest_align;	/* in bytes */
};

extern struct lttng_kernel_ctx *lttng_static_ctx;

static inline
const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type)
{
	if (type->type != lttng_kernel_type_integer)
		return NULL;
	return container_of(type, const struct lttng_kernel_type_integer, parent);
}

static inline
const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type)
{
	if (type->type != lttng_kernel_type_string)
		return NULL;
	return container_of(type, const struct lttng_kernel_type_string, parent);
}

static inline
const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type)
{
	if (type->type != lttng_kernel_type_enum)
		return NULL;
	return container_of(type, const struct lttng_kernel_type_enum, parent);
}

static inline
const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type)
{
	if (type->type != lttng_kernel_type_array)
		return NULL;
	return container_of(type, const struct lttng_kernel_type_array, parent);
}

static inline
const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type)
{
	if (type->type != lttng_kernel_type_sequence)
		return NULL;
	return container_of(type, const struct lttng_kernel_type_sequence, parent);
}

static inline
const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type)
{
	if (type->type != lttng_kernel_type_struct)
		return NULL;
	return container_of(type, const struct lttng_kernel_type_struct, parent);
}

static inline
const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type)
{
	if (type->type != lttng_kernel_type_variant)
		return NULL;
	return container_of(type, const struct lttng_kernel_type_variant, parent);
}

static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type)
{
	const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type);

	if (!type_integer)
		return false;
	switch (type_integer->size) {
	case 8:		/* Fall-through. */
	case 16:	/* Fall-through. */
	case 32:	/* Fall-through. */
	case 64:
		break;
	default:
		return false;
	}
	return true;
}

int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event,
		const char *interpreter_stack_data,
		struct lttng_probe_ctx *probe_ctx,
		void *event_filter_ctx);

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;
}

int lttng_context_init(void);
void lttng_context_exit(void);
int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p,
		const struct lttng_kernel_ctx_field *f);
void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p);
struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx,
		size_t index);
int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name);
int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name);
void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx);
int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx);
#if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif
#ifdef CONFIG_PREEMPT_RT_FULL
int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type);

#if defined(CONFIG_CGROUPS) && \
	((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
	 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

#if defined(CONFIG_IPC_NS) && \
	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

#if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

#if defined(CONFIG_NET_NS) && \
	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

#if defined(CONFIG_PID_NS) && \
	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

#if defined(CONFIG_USER_NS) && \
	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

#if defined(CONFIG_UTS_NS) && \
	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

#if defined(CONFIG_TIME_NS) && \
	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx);
#else
static inline
int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx)
{
	return -ENOSYS;
}
#endif

int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx);
int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx);

#if defined(CONFIG_PERF_EVENTS)
int lttng_add_perf_counter_to_ctx(uint32_t type,
				  uint64_t config,
				  const char *name,
				  struct lttng_kernel_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,
				  uint64_t config,
				  const char *name,
				  struct lttng_kernel_ctx **ctx)
{
	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


#define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv)	\
	__LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, {					\
		.event_field = (_event_field),								\
		.get_size = (_get_size),								\
		.record = (_record),									\
		.get_value = (_get_value),								\
		.destroy = (_destroy),									\
		.priv = (_priv),									\
	})

#endif /* _LTTNG_EVENTS_INTERNAL_H */
Commit	Line	Data
92bc1e23 MD	1	/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
	2	*
	3	* lttng/events-internal.h
	4	*
	5	* Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	6	*/
	7
	8	#ifndef _LTTNG_EVENTS_INTERNAL_H
	9	#define _LTTNG_EVENTS_INTERNAL_H
	10
437d5aa5 MD	11	#include <lttng/events.h>
437d5aa5 MD	12
a67ba386 MD	13	struct lttng_kernel_event_common_private {
	14	struct lttng_kernel_event_common pub; / Public event interface */
	15
	16	const struct lttng_kernel_event_desc *desc;
	17	/* Backward references: list of lttng_enabler_ref (ref to enablers) */
	18	struct list_head enablers_ref_head;
	19	int registered; /* has reg'd tracepoint probe */
	20	uint64_t user_token;
	21
	22	int has_enablers_without_filter_bytecode;
8a445457	23	/* list of struct lttng_bytecode_runtime, sorted by seqnum */
a67ba386 MD	24	struct list_head filter_bytecode_runtime_head;
	25	enum lttng_kernel_abi_instrumentation instrumentation;
	26	/* Selected by instrumentation */
	27	union {
	28	struct lttng_kprobe kprobe;
	29	struct lttng_uprobe uprobe;
	30	struct {
	31	struct lttng_krp *lttng_krp;
	32	char *symbol_name;
	33	} kretprobe;
	34	struct {
	35	enum lttng_syscall_entryexit entryexit;
	36	enum lttng_syscall_abi abi;
	37	struct hlist_node node; /* chain registered syscall event_notifier */
	38	unsigned int syscall_id;
	39	} syscall;
	40	} u;
	41	};
	42
	43	struct lttng_kernel_event_recorder_private {
	44	struct lttng_kernel_event_common_private parent;
	45
	46	struct lttng_kernel_event_recorder pub; / Public event interface */
	47	struct list_head node; /* Event recorder list */
	48	struct hlist_node hlist; /* Hash table of event recorders */
	49	struct lttng_kernel_ctx *ctx;
	50	unsigned int id;
	51	unsigned int metadata_dumped:1;
	52	};
	53
	54	struct lttng_kernel_event_notifier_private {
	55	struct lttng_kernel_event_common_private parent;
	56
	57	struct lttng_kernel_event_notifier pub; / Public event notifier interface */
	58	struct lttng_event_notifier_group group; / weak ref */
	59	size_t num_captures; /* Needed to allocate the msgpack array. */
	60	uint64_t error_counter_index;
	61	struct list_head node; /* Event notifier list */
	62	struct hlist_node hlist; /* Hash table of event notifiers */
	63	struct list_head capture_bytecode_runtime_head;
	64
	65	};
	66
8a445457 MD	67	enum lttng_kernel_bytecode_interpreter_ret {
	68	LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1,
	69	LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0,
	70	};
	71
	72	enum lttng_kernel_bytecode_filter_result {
	73	LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0,
	74	LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1,
	75	};
	76
	77	struct lttng_kernel_bytecode_filter_ctx {
	78	enum lttng_kernel_bytecode_filter_result result;
	79	};
	80
5e08a34f MD	81	/*
	82	* Enabler field, within whatever object is enabling an event. Target of
	83	* backward reference.
	84	*/
	85	struct lttng_enabler {
	86	enum lttng_enabler_format_type format_type;
	87
d64ca521	88	/* head list of struct lttng_kernel_bytecode_node */
5e08a34f MD	89	struct list_head filter_bytecode_head;
	90
	91	struct lttng_kernel_abi_event event_param;
	92	unsigned int enabled:1;
	93
	94	uint64_t user_token; /* User-provided token. */
	95	};
	96
	97	struct lttng_event_enabler {
	98	struct lttng_enabler base;
	99	struct list_head node; /* per-session list of enablers */
	100	struct lttng_channel *chan;
	101	};
	102
	103	struct lttng_event_notifier_enabler {
	104	struct lttng_enabler base;
	105	uint64_t error_counter_index;
	106	struct list_head node; /* List of event_notifier enablers */
	107	struct lttng_event_notifier_group *group;
	108
d64ca521	109	/* head list of struct lttng_kernel_bytecode_node */
5e08a34f MD	110	struct list_head capture_bytecode_head;
	111	uint64_t num_captures;
	112	};
	113
0fe45627 MD	114	struct lttng_ctx_value {
	115	union {
	116	int64_t s64;
	117	const char *str;
	118	double d;
	119	} u;
	120	};
	121
	122	/*
	123	* We need to keep this perf counter field separately from struct
	124	* lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
	125	*/
	126	struct lttng_perf_counter_field {
	127	#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
	128	struct lttng_cpuhp_node cpuhp_prepare;
	129	struct lttng_cpuhp_node cpuhp_online;
	130	#else
	131	struct notifier_block nb;
	132	int hp_enable;
	133	#endif
	134	struct perf_event_attr *attr;
	135	struct perf_event *e; / per-cpu array */
	136	char *name;
	137	struct lttng_kernel_event_field *event_field;
	138	};
	139
	140	struct lttng_kernel_ctx_field {
	141	const struct lttng_kernel_event_field *event_field;
	142	size_t (get_size)(void priv, struct lttng_probe_ctx *probe_ctx,
	143	size_t offset);
	144	void (record)(void priv, struct lttng_probe_ctx *probe_ctx,
	145	struct lib_ring_buffer_ctx *ctx,
	146	struct lttng_channel *chan);
	147	void (get_value)(void priv, struct lttng_probe_ctx *probe_ctx,
	148	struct lttng_ctx_value *value);
	149	void (destroy)(void priv);
	150	void *priv;
	151	};
	152
	153	struct lttng_kernel_ctx {
	154	struct lttng_kernel_ctx_field *fields;
	155	unsigned int nr_fields;
	156	unsigned int allocated_fields;
	157	size_t largest_align; /* in bytes */
	158	};
	159
	160	extern struct lttng_kernel_ctx *lttng_static_ctx;
	161
437d5aa5 MD	162	static inline
	163	const struct lttng_kernel_type_integer lttng_kernel_get_type_integer(const struct lttng_kernel_type_common type)
	164	{
	165	if (type->type != lttng_kernel_type_integer)
	166	return NULL;
	167	return container_of(type, const struct lttng_kernel_type_integer, parent);
	168	}
	169
	170	static inline
	171	const struct lttng_kernel_type_string lttng_kernel_get_type_string(const struct lttng_kernel_type_common type)
	172	{
	173	if (type->type != lttng_kernel_type_string)
	174	return NULL;
	175	return container_of(type, const struct lttng_kernel_type_string, parent);
	176	}
	177
	178	static inline
	179	const struct lttng_kernel_type_enum lttng_kernel_get_type_enum(const struct lttng_kernel_type_common type)
	180	{
	181	if (type->type != lttng_kernel_type_enum)
	182	return NULL;
	183	return container_of(type, const struct lttng_kernel_type_enum, parent);
	184	}
	185
	186	static inline
	187	const struct lttng_kernel_type_array lttng_kernel_get_type_array(const struct lttng_kernel_type_common type)
	188	{
	189	if (type->type != lttng_kernel_type_array)
	190	return NULL;
	191	return container_of(type, const struct lttng_kernel_type_array, parent);
	192	}
	193
	194	static inline
	195	const struct lttng_kernel_type_sequence lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common type)
	196	{
	197	if (type->type != lttng_kernel_type_sequence)
	198	return NULL;
	199	return container_of(type, const struct lttng_kernel_type_sequence, parent);
	200	}
	201
	202	static inline
	203	const struct lttng_kernel_type_struct lttng_kernel_get_type_struct(const struct lttng_kernel_type_common type)
	204	{
	205	if (type->type != lttng_kernel_type_struct)
	206	return NULL;
	207	return container_of(type, const struct lttng_kernel_type_struct, parent);
	208	}
	209
	210	static inline
	211	const struct lttng_kernel_type_variant lttng_kernel_get_type_variant(const struct lttng_kernel_type_common type)
	212	{
	213	if (type->type != lttng_kernel_type_variant)
	214	return NULL;
	215	return container_of(type, const struct lttng_kernel_type_variant, parent);
	216	}
	217
	218	static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type)
	219	{
	220	const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type);
	221
	222	if (!type_integer)
	223	return false;
	224	switch (type_integer->size) {
	225	case 8: /* Fall-through. */
226	case 16: /* Fall-through. */
227	case 32: /* Fall-through. */
228	case 64:
229	break;
230	default:
231	return false;
232	}
233	return true;
234	}
235
8a445457 MD	236	int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event,
	237	const char *interpreter_stack_data,
	238	struct lttng_probe_ctx *probe_ctx,
	239	void *event_filter_ctx);
	240
5e08a34f MD	241	static inline
	242	struct lttng_enabler *lttng_event_enabler_as_enabler(
	243	struct lttng_event_enabler *event_enabler)
	244	{
	245	return &event_enabler->base;
	246	}
	247
	248	static inline
	249	struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
	250	struct lttng_event_notifier_enabler *event_notifier_enabler)
	251	{
	252	return &event_notifier_enabler->base;
	253	}
	254
0fe45627 MD	255	int lttng_context_init(void);
	256	void lttng_context_exit(void);
	257	int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p,
	258	const struct lttng_kernel_ctx_field *f);
	259	void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p);
	260	struct lttng_kernel_ctx_field lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx ctx,
	261	size_t index);
	262	int lttng_kernel_find_context(struct lttng_kernel_ctx ctx, const char name);
	263	int lttng_kernel_get_context_index(struct lttng_kernel_ctx ctx, const char name);
	264	void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx);
	265	int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx);
	266	int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx);
	267	int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx);
	268	int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx);
	269	int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx);
	270	int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx);
	271	int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx);
	272	int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx);
	273	int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx);
	274	int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx);
	275	int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx);
	276	int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx);
	277	int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx);
	278	#if defined(CONFIG_PREEMPT_RT_FULL) \|\| defined(CONFIG_PREEMPT)
	279	int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx);
	280	#else
	281	static inline
	282	int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx)
	283	{
	284	return -ENOSYS;
	285	}
	286	#endif
	287	#ifdef CONFIG_PREEMPT_RT_FULL
	288	int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx);
	289	#else
	290	static inline
	291	int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx)
	292	{
	293	return -ENOSYS;
	294	}
	295	#endif
	296
	297	int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type);
	298
	299	#if defined(CONFIG_CGROUPS) && \
	300	((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) \|\| \
	301	LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
	302	int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx);
	303	#else
	304	static inline
	305	int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx)
	306	{
	307	return -ENOSYS;
	308	}
	309	#endif
	310
	311	#if defined(CONFIG_IPC_NS) && \
	312	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
	313	int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx);
	314	#else
	315	static inline
	316	int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx)
	317	{
	318	return -ENOSYS;
319	}
320	#endif
321
322	#if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
323	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
324	int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx);
325	#else
326	static inline
327	int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx)
328	{
329	return -ENOSYS;
330	}
331	#endif
332
333	#if defined(CONFIG_NET_NS) && \
334	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
335	int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx);
336	#else
337	static inline
338	int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx)
339	{
340	return -ENOSYS;
341	}
342	#endif
343
344	#if defined(CONFIG_PID_NS) && \
345	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
346	int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx);
347	#else
348	static inline
349	int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx)
350	{
351	return -ENOSYS;
352	}
353	#endif
354
355	#if defined(CONFIG_USER_NS) && \
356	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
357	int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx);
358	#else
359	static inline
360	int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx)
361	{
362	return -ENOSYS;
363	}
364	#endif
365
366	#if defined(CONFIG_UTS_NS) && \
367	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
368	int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx);
369	#else
370	static inline
371	int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx)
372	{
373	return -ENOSYS;
374	}
375	#endif
376
377	#if defined(CONFIG_TIME_NS) && \
378	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
379	int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx);
380	#else
381	static inline
382	int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx)
383	{
384	return -ENOSYS;
385	}
386	#endif
387
388	int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx);
389	int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx);
390	int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx);
391	int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx);
392	int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx);
393	int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx);
394	int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx);
395	int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx);
396	int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx);
397	int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx);
398	int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx);
399	int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx);
400
401	#if defined(CONFIG_PERF_EVENTS)
402	int lttng_add_perf_counter_to_ctx(uint32_t type,
403	uint64_t config,
404	const char *name,
405	struct lttng_kernel_ctx **ctx);
406	int lttng_cpuhp_perf_counter_online(unsigned int cpu,
407	struct lttng_cpuhp_node *node);
408	int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
409	struct lttng_cpuhp_node *node);
410	#else
411	static inline
412	int lttng_add_perf_counter_to_ctx(uint32_t type,
413	uint64_t config,
414	const char *name,
415	struct lttng_kernel_ctx **ctx)
416	{
417	return -ENOSYS;
418	}
419	static inline
420	int lttng_cpuhp_perf_counter_online(unsigned int cpu,
421	struct lttng_cpuhp_node *node)
422	{
423	return 0;
424	}
425	static inline
426	int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
427	struct lttng_cpuhp_node *node)
428	{
429	return 0;
430	}
431	#endif
432
433
434
435	#define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
436	__LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
437	.event_field = (_event_field), \
438	.get_size = (_get_size), \
439	.record = (_record), \
440	.get_value = (_get_value), \
441	.destroy = (_destroy), \
442	.priv = (_priv), \
443	})
444
92bc1e23	445	#endif /* _LTTNG_EVENTS_INTERNAL_H */