Current File : //lib/modules/6.8.0-60-generic/build/include/linux/trace_events.h
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _LINUX_TRACE_EVENT_H
#define _LINUX_TRACE_EVENT_H

#include <linux/ring_buffer.h>
#include <linux/trace_seq.h>
#include <linux/percpu.h>
#include <linux/hardirq.h>
#include <linux/perf_event.h>
#include <linux/tracepoint.h>

struct trace_array;
struct array_buffer;
struct tracer;
struct dentry;
struct bpf_prog;
union bpf_attr;

const char *trace_print_flags_seq(struct trace_seq *p, const char *delim,
				  unsigned long flags,
				  const struct trace_print_flags *flag_array);

const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
				    const struct trace_print_flags *symbol_array);

#if BITS_PER_LONG == 32
const char *trace_print_flags_seq_u64(struct trace_seq *p, const char *delim,
		      unsigned long long flags,
		      const struct trace_print_flags_u64 *flag_array);

const char *trace_print_symbols_seq_u64(struct trace_seq *p,
					unsigned long long val,
					const struct trace_print_flags_u64
								 *symbol_array);
#endif

const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
				    unsigned int bitmask_size);

const char *trace_print_hex_seq(struct trace_seq *p,
				const unsigned char *buf, int len,
				bool concatenate);

const char *trace_print_array_seq(struct trace_seq *p,
				   const void *buf, int count,
				   size_t el_size);

const char *
trace_print_hex_dump_seq(struct trace_seq *p, const char *prefix_str,
			 int prefix_type, int rowsize, int groupsize,
			 const void *buf, size_t len, bool ascii);

struct trace_iterator;
struct trace_event;

int trace_raw_output_prep(struct trace_iterator *iter,
			  struct trace_event *event);
extern __printf(2, 3)
void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...);

/* Used to find the offset and length of dynamic fields in trace events */
struct trace_dynamic_info {
#ifdef CONFIG_CPU_BIG_ENDIAN
	u16	len;
	u16	offset;
#else
	u16	offset;
	u16	len;
#endif
} __packed;

/*
 * The trace entry - the most basic unit of tracing. This is what
 * is printed in the end as a single line in the trace output, such as:
 *
 *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
 */
struct trace_entry {
	unsigned short		type;
	unsigned char		flags;
	unsigned char		preempt_count;
	int			pid;
};

#define TRACE_EVENT_TYPE_MAX						\
	((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)

/*
 * Trace iterator - used by printout routines who present trace
 * results to users and which routines might sleep, etc:
 */
struct trace_iterator {
	struct trace_array	*tr;
	struct tracer		*trace;
	struct array_buffer	*array_buffer;
	void			*private;
	int			cpu_file;
	struct mutex		mutex;
	struct ring_buffer_iter	**buffer_iter;
	unsigned long		iter_flags;
	void			*temp;	/* temp holder */
	unsigned int		temp_size;
	char			*fmt;	/* modified format holder */
	unsigned int		fmt_size;
	atomic_t		wait_index;

	/* trace_seq for __print_flags() and __print_symbolic() etc. */
	struct trace_seq	tmp_seq;

	cpumask_var_t		started;

	/* Set when the file is closed to prevent new waiters */
	bool			closed;

	/* it's true when current open file is snapshot */
	bool			snapshot;

	/* The below is zeroed out in pipe_read */
	struct trace_seq	seq;
	struct trace_entry	*ent;
	unsigned long		lost_events;
	int			leftover;
	int			ent_size;
	int			cpu;
	u64			ts;

	loff_t			pos;
	long			idx;

	/* All new field here will be zeroed out in pipe_read */
};

enum trace_iter_flags {
	TRACE_FILE_LAT_FMT	= 1,
	TRACE_FILE_ANNOTATE	= 2,
	TRACE_FILE_TIME_IN_NS	= 4,
};


typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
				      int flags, struct trace_event *event);

struct trace_event_functions {
	trace_print_func	trace;
	trace_print_func	raw;
	trace_print_func	hex;
	trace_print_func	binary;
};

struct trace_event {
	struct hlist_node		node;
	int				type;
	struct trace_event_functions	*funcs;
};

extern int register_trace_event(struct trace_event *event);
extern int unregister_trace_event(struct trace_event *event);

/* Return values for print_line callback */
enum print_line_t {
	TRACE_TYPE_PARTIAL_LINE	= 0,	/* Retry after flushing the seq */
	TRACE_TYPE_HANDLED	= 1,
	TRACE_TYPE_UNHANDLED	= 2,	/* Relay to other output functions */
	TRACE_TYPE_NO_CONSUME	= 3	/* Handled but ask to not consume */
};

enum print_line_t trace_handle_return(struct trace_seq *s);

static inline void tracing_generic_entry_update(struct trace_entry *entry,
						unsigned short type,
						unsigned int trace_ctx)
{
	entry->preempt_count		= trace_ctx & 0xff;
	entry->pid			= current->pid;
	entry->type			= type;
	entry->flags =			trace_ctx >> 16;
}

unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status);

enum trace_flag_type {
	TRACE_FLAG_IRQS_OFF		= 0x01,
	TRACE_FLAG_IRQS_NOSUPPORT	= 0x02,
	TRACE_FLAG_NEED_RESCHED		= 0x04,
	TRACE_FLAG_HARDIRQ		= 0x08,
	TRACE_FLAG_SOFTIRQ		= 0x10,
	TRACE_FLAG_PREEMPT_RESCHED	= 0x20,
	TRACE_FLAG_NMI			= 0x40,
	TRACE_FLAG_BH_OFF		= 0x80,
};

#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
{
	unsigned int irq_status = irqs_disabled_flags(irqflags) ?
		TRACE_FLAG_IRQS_OFF : 0;
	return tracing_gen_ctx_irq_test(irq_status);
}
static inline unsigned int tracing_gen_ctx(void)
{
	unsigned long irqflags;

	local_save_flags(irqflags);
	return tracing_gen_ctx_flags(irqflags);
}
#else

static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
{
	return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
}
static inline unsigned int tracing_gen_ctx(void)
{
	return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
}
#endif

static inline unsigned int tracing_gen_ctx_dec(void)
{
	unsigned int trace_ctx;

	trace_ctx = tracing_gen_ctx();
	/*
	 * Subtract one from the preemption counter if preemption is enabled,
	 * see trace_event_buffer_reserve()for details.
	 */
	if (IS_ENABLED(CONFIG_PREEMPTION))
		trace_ctx--;
	return trace_ctx;
}

struct trace_event_file;

struct ring_buffer_event *
trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer,
				struct trace_event_file *trace_file,
				int type, unsigned long len,
				unsigned int trace_ctx);

#define TRACE_RECORD_CMDLINE	BIT(0)
#define TRACE_RECORD_TGID	BIT(1)

void tracing_record_taskinfo(struct task_struct *task, int flags);
void tracing_record_taskinfo_sched_switch(struct task_struct *prev,
					  struct task_struct *next, int flags);

void tracing_record_cmdline(struct task_struct *task);
void tracing_record_tgid(struct task_struct *task);

int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
	 __printf(3, 4);

struct event_filter;

enum trace_reg {
	TRACE_REG_REGISTER,
	TRACE_REG_UNREGISTER,
#ifdef CONFIG_PERF_EVENTS
	TRACE_REG_PERF_REGISTER,
	TRACE_REG_PERF_UNREGISTER,
	TRACE_REG_PERF_OPEN,
	TRACE_REG_PERF_CLOSE,
	/*
	 * These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a
	 * custom action was taken and the default action is not to be
	 * performed.
	 */
	TRACE_REG_PERF_ADD,
	TRACE_REG_PERF_DEL,
#endif
};

struct trace_event_call;

#define TRACE_FUNCTION_TYPE ((const char *)~0UL)

struct trace_event_fields {
	const char *type;
	union {
		struct {
			const char *name;
			const int  size;
			const int  align;
			const unsigned int is_signed:1;
			unsigned int needs_test:1;
			const int  filter_type;
			const int  len;
		};
		int (*define_fields)(struct trace_event_call *);
	};
};

struct trace_event_class {
	const char		*system;
	void			*probe;
#ifdef CONFIG_PERF_EVENTS
	void			*perf_probe;
#endif
	int			(*reg)(struct trace_event_call *event,
				       enum trace_reg type, void *data);
	struct trace_event_fields *fields_array;
	struct list_head	*(*get_fields)(struct trace_event_call *);
	struct list_head	fields;
	int			(*raw_init)(struct trace_event_call *);
};

extern int trace_event_reg(struct trace_event_call *event,
			    enum trace_reg type, void *data);

struct trace_event_buffer {
	struct trace_buffer		*buffer;
	struct ring_buffer_event	*event;
	struct trace_event_file		*trace_file;
	void				*entry;
	unsigned int			trace_ctx;
	struct pt_regs			*regs;
};

void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer,
				  struct trace_event_file *trace_file,
				  unsigned long len);

void trace_event_buffer_commit(struct trace_event_buffer *fbuffer);

enum {
	TRACE_EVENT_FL_FILTERED_BIT,
	TRACE_EVENT_FL_CAP_ANY_BIT,
	TRACE_EVENT_FL_NO_SET_FILTER_BIT,
	TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
	TRACE_EVENT_FL_TRACEPOINT_BIT,
	TRACE_EVENT_FL_DYNAMIC_BIT,
	TRACE_EVENT_FL_KPROBE_BIT,
	TRACE_EVENT_FL_UPROBE_BIT,
	TRACE_EVENT_FL_EPROBE_BIT,
	TRACE_EVENT_FL_FPROBE_BIT,
	TRACE_EVENT_FL_CUSTOM_BIT,
	TRACE_EVENT_FL_TEST_STR_BIT,
};

/*
 * Event flags:
 *  FILTERED	  - The event has a filter attached
 *  CAP_ANY	  - Any user can enable for perf
 *  NO_SET_FILTER - Set when filter has error and is to be ignored
 *  IGNORE_ENABLE - For trace internal events, do not enable with debugfs file
 *  TRACEPOINT    - Event is a tracepoint
 *  DYNAMIC       - Event is a dynamic event (created at run time)
 *  KPROBE        - Event is a kprobe
 *  UPROBE        - Event is a uprobe
 *  EPROBE        - Event is an event probe
 *  FPROBE        - Event is an function probe
 *  CUSTOM        - Event is a custom event (to be attached to an exsiting tracepoint)
 *                   This is set when the custom event has not been attached
 *                   to a tracepoint yet, then it is cleared when it is.
 *  TEST_STR      - The event has a "%s" that points to a string outside the event
 */
enum {
	TRACE_EVENT_FL_FILTERED		= (1 << TRACE_EVENT_FL_FILTERED_BIT),
	TRACE_EVENT_FL_CAP_ANY		= (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
	TRACE_EVENT_FL_NO_SET_FILTER	= (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
	TRACE_EVENT_FL_IGNORE_ENABLE	= (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
	TRACE_EVENT_FL_TRACEPOINT	= (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
	TRACE_EVENT_FL_DYNAMIC		= (1 << TRACE_EVENT_FL_DYNAMIC_BIT),
	TRACE_EVENT_FL_KPROBE		= (1 << TRACE_EVENT_FL_KPROBE_BIT),
	TRACE_EVENT_FL_UPROBE		= (1 << TRACE_EVENT_FL_UPROBE_BIT),
	TRACE_EVENT_FL_EPROBE		= (1 << TRACE_EVENT_FL_EPROBE_BIT),
	TRACE_EVENT_FL_FPROBE		= (1 << TRACE_EVENT_FL_FPROBE_BIT),
	TRACE_EVENT_FL_CUSTOM		= (1 << TRACE_EVENT_FL_CUSTOM_BIT),
	TRACE_EVENT_FL_TEST_STR		= (1 << TRACE_EVENT_FL_TEST_STR_BIT),
};

#define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)

struct trace_event_call {
	struct list_head	list;
	struct trace_event_class *class;
	union {
		const char		*name;
		/* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */
		struct tracepoint	*tp;
	};
	struct trace_event	event;
	char			*print_fmt;
	struct event_filter	*filter;
	/*
	 * Static events can disappear with modules,
	 * where as dynamic ones need their own ref count.
	 */
	union {
		void				*module;
		atomic_t			refcnt;
	};
	void			*data;

	/* See the TRACE_EVENT_FL_* flags above */
	int			flags; /* static flags of different events */

#ifdef CONFIG_PERF_EVENTS
	int				perf_refcount;
	struct hlist_head __percpu	*perf_events;
	struct bpf_prog_array __rcu	*prog_array;

	int	(*perf_perm)(struct trace_event_call *,
			     struct perf_event *);
#endif
};

#ifdef CONFIG_DYNAMIC_EVENTS
bool trace_event_dyn_try_get_ref(struct trace_event_call *call);
void trace_event_dyn_put_ref(struct trace_event_call *call);
bool trace_event_dyn_busy(struct trace_event_call *call);
#else
static inline bool trace_event_dyn_try_get_ref(struct trace_event_call *call)
{
	/* Without DYNAMIC_EVENTS configured, nothing should be calling this */
	return false;
}
static inline void trace_event_dyn_put_ref(struct trace_event_call *call)
{
}
static inline bool trace_event_dyn_busy(struct trace_event_call *call)
{
	/* Nothing should call this without DYNAIMIC_EVENTS configured. */
	return true;
}
#endif

static inline bool trace_event_try_get_ref(struct trace_event_call *call)
{
	if (call->flags & TRACE_EVENT_FL_DYNAMIC)
		return trace_event_dyn_try_get_ref(call);
	else
		return try_module_get(call->module);
}

static inline void trace_event_put_ref(struct trace_event_call *call)
{
	if (call->flags & TRACE_EVENT_FL_DYNAMIC)
		trace_event_dyn_put_ref(call);
	else
		module_put(call->module);
}

#ifdef CONFIG_PERF_EVENTS
static inline bool bpf_prog_array_valid(struct trace_event_call *call)
{
	/*
	 * This inline function checks whether call->prog_array
	 * is valid or not. The function is called in various places,
	 * outside rcu_read_lock/unlock, as a heuristic to speed up execution.
	 *
	 * If this function returns true, and later call->prog_array
	 * becomes false inside rcu_read_lock/unlock region,
	 * we bail out then. If this function return false,
	 * there is a risk that we might miss a few events if the checking
	 * were delayed until inside rcu_read_lock/unlock region and
	 * call->prog_array happened to become non-NULL then.
	 *
	 * Here, READ_ONCE() is used instead of rcu_access_pointer().
	 * rcu_access_pointer() requires the actual definition of
	 * "struct bpf_prog_array" while READ_ONCE() only needs
	 * a declaration of the same type.
	 */
	return !!READ_ONCE(call->prog_array);
}
#endif

static inline const char *
trace_event_name(struct trace_event_call *call)
{
	if (call->flags & TRACE_EVENT_FL_CUSTOM)
		return call->name;
	else if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
		return call->tp ? call->tp->name : NULL;
	else
		return call->name;
}

static inline struct list_head *
trace_get_fields(struct trace_event_call *event_call)
{
	if (!event_call->class->get_fields)
		return &event_call->class->fields;
	return event_call->class->get_fields(event_call);
}

struct trace_subsystem_dir;

enum {
	EVENT_FILE_FL_ENABLED_BIT,
	EVENT_FILE_FL_RECORDED_CMD_BIT,
	EVENT_FILE_FL_RECORDED_TGID_BIT,
	EVENT_FILE_FL_FILTERED_BIT,
	EVENT_FILE_FL_NO_SET_FILTER_BIT,
	EVENT_FILE_FL_SOFT_MODE_BIT,
	EVENT_FILE_FL_SOFT_DISABLED_BIT,
	EVENT_FILE_FL_TRIGGER_MODE_BIT,
	EVENT_FILE_FL_TRIGGER_COND_BIT,
	EVENT_FILE_FL_PID_FILTER_BIT,
	EVENT_FILE_FL_WAS_ENABLED_BIT,
	EVENT_FILE_FL_FREED_BIT,
};

extern struct trace_event_file *trace_get_event_file(const char *instance,
						     const char *system,
						     const char *event);
extern void trace_put_event_file(struct trace_event_file *file);

#define MAX_DYNEVENT_CMD_LEN	(2048)

enum dynevent_type {
	DYNEVENT_TYPE_SYNTH = 1,
	DYNEVENT_TYPE_KPROBE,
	DYNEVENT_TYPE_NONE,
};

struct dynevent_cmd;

typedef int (*dynevent_create_fn_t)(struct dynevent_cmd *cmd);

struct dynevent_cmd {
	struct seq_buf		seq;
	const char		*event_name;
	unsigned int		n_fields;
	enum dynevent_type	type;
	dynevent_create_fn_t	run_command;
	void			*private_data;
};

extern int dynevent_create(struct dynevent_cmd *cmd);

extern int synth_event_delete(const char *name);

extern void synth_event_cmd_init(struct dynevent_cmd *cmd,
				 char *buf, int maxlen);

extern int __synth_event_gen_cmd_start(struct dynevent_cmd *cmd,
				       const char *name,
				       struct module *mod, ...);

#define synth_event_gen_cmd_start(cmd, name, mod, ...)	\
	__synth_event_gen_cmd_start(cmd, name, mod, ## __VA_ARGS__, NULL)

struct synth_field_desc {
	const char *type;
	const char *name;
};

extern int synth_event_gen_cmd_array_start(struct dynevent_cmd *cmd,
					   const char *name,
					   struct module *mod,
					   struct synth_field_desc *fields,
					   unsigned int n_fields);
extern int synth_event_create(const char *name,
			      struct synth_field_desc *fields,
			      unsigned int n_fields, struct module *mod);

extern int synth_event_add_field(struct dynevent_cmd *cmd,
				 const char *type,
				 const char *name);
extern int synth_event_add_field_str(struct dynevent_cmd *cmd,
				     const char *type_name);
extern int synth_event_add_fields(struct dynevent_cmd *cmd,
				  struct synth_field_desc *fields,
				  unsigned int n_fields);

#define synth_event_gen_cmd_end(cmd)	\
	dynevent_create(cmd)

struct synth_event;

struct synth_event_trace_state {
	struct trace_event_buffer fbuffer;
	struct synth_trace_event *entry;
	struct trace_buffer *buffer;
	struct synth_event *event;
	unsigned int cur_field;
	unsigned int n_u64;
	bool disabled;
	bool add_next;
	bool add_name;
};

extern int synth_event_trace(struct trace_event_file *file,
			     unsigned int n_vals, ...);
extern int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
				   unsigned int n_vals);
extern int synth_event_trace_start(struct trace_event_file *file,
				   struct synth_event_trace_state *trace_state);
extern int synth_event_add_next_val(u64 val,
				    struct synth_event_trace_state *trace_state);
extern int synth_event_add_val(const char *field_name, u64 val,
			       struct synth_event_trace_state *trace_state);
extern int synth_event_trace_end(struct synth_event_trace_state *trace_state);

extern int kprobe_event_delete(const char *name);

extern void kprobe_event_cmd_init(struct dynevent_cmd *cmd,
				  char *buf, int maxlen);

#define kprobe_event_gen_cmd_start(cmd, name, loc, ...)			\
	__kprobe_event_gen_cmd_start(cmd, false, name, loc, ## __VA_ARGS__, NULL)

#define kretprobe_event_gen_cmd_start(cmd, name, loc, ...)		\
	__kprobe_event_gen_cmd_start(cmd, true, name, loc, ## __VA_ARGS__, NULL)

extern int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd,
					bool kretprobe,
					const char *name,
					const char *loc, ...);

#define kprobe_event_add_fields(cmd, ...)	\
	__kprobe_event_add_fields(cmd, ## __VA_ARGS__, NULL)

#define kprobe_event_add_field(cmd, field)	\
	__kprobe_event_add_fields(cmd, field, NULL)

extern int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...);

#define kprobe_event_gen_cmd_end(cmd)		\
	dynevent_create(cmd)

#define kretprobe_event_gen_cmd_end(cmd)	\
	dynevent_create(cmd)

/*
 * Event file flags:
 *  ENABLED	  - The event is enabled
 *  RECORDED_CMD  - The comms should be recorded at sched_switch
 *  RECORDED_TGID - The tgids should be recorded at sched_switch
 *  FILTERED	  - The event has a filter attached
 *  NO_SET_FILTER - Set when filter has error and is to be ignored
 *  SOFT_MODE     - The event is enabled/disabled by SOFT_DISABLED
 *  SOFT_DISABLED - When set, do not trace the event (even though its
 *                   tracepoint may be enabled)
 *  TRIGGER_MODE  - When set, invoke the triggers associated with the event
 *  TRIGGER_COND  - When set, one or more triggers has an associated filter
 *  PID_FILTER    - When set, the event is filtered based on pid
 *  WAS_ENABLED   - Set when enabled to know to clear trace on module removal
 *  FREED         - File descriptor is freed, all fields should be considered invalid
 */
enum {
	EVENT_FILE_FL_ENABLED		= (1 << EVENT_FILE_FL_ENABLED_BIT),
	EVENT_FILE_FL_RECORDED_CMD	= (1 << EVENT_FILE_FL_RECORDED_CMD_BIT),
	EVENT_FILE_FL_RECORDED_TGID	= (1 << EVENT_FILE_FL_RECORDED_TGID_BIT),
	EVENT_FILE_FL_FILTERED		= (1 << EVENT_FILE_FL_FILTERED_BIT),
	EVENT_FILE_FL_NO_SET_FILTER	= (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT),
	EVENT_FILE_FL_SOFT_MODE		= (1 << EVENT_FILE_FL_SOFT_MODE_BIT),
	EVENT_FILE_FL_SOFT_DISABLED	= (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT),
	EVENT_FILE_FL_TRIGGER_MODE	= (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT),
	EVENT_FILE_FL_TRIGGER_COND	= (1 << EVENT_FILE_FL_TRIGGER_COND_BIT),
	EVENT_FILE_FL_PID_FILTER	= (1 << EVENT_FILE_FL_PID_FILTER_BIT),
	EVENT_FILE_FL_WAS_ENABLED	= (1 << EVENT_FILE_FL_WAS_ENABLED_BIT),
	EVENT_FILE_FL_FREED		= (1 << EVENT_FILE_FL_FREED_BIT),
};

struct trace_event_file {
	struct list_head		list;
	struct trace_event_call		*event_call;
	struct event_filter __rcu	*filter;
	struct eventfs_inode		*ei;
	struct trace_array		*tr;
	struct trace_subsystem_dir	*system;
	struct list_head		triggers;

	/*
	 * 32 bit flags:
	 *   bit 0:		enabled
	 *   bit 1:		enabled cmd record
	 *   bit 2:		enable/disable with the soft disable bit
	 *   bit 3:		soft disabled
	 *   bit 4:		trigger enabled
	 *
	 * Note: The bits must be set atomically to prevent races
	 * from other writers. Reads of flags do not need to be in
	 * sync as they occur in critical sections. But the way flags
	 * is currently used, these changes do not affect the code
	 * except that when a change is made, it may have a slight
	 * delay in propagating the changes to other CPUs due to
	 * caching and such. Which is mostly OK ;-)
	 */
	unsigned long		flags;
	atomic_t		ref;	/* ref count for opened files */
	atomic_t		sm_ref;	/* soft-mode reference counter */
	atomic_t		tm_ref;	/* trigger-mode reference counter */
};

#define __TRACE_EVENT_FLAGS(name, value)				\
	static int __init trace_init_flags_##name(void)			\
	{								\
		event_##name.flags |= value;				\
		return 0;						\
	}								\
	early_initcall(trace_init_flags_##name);

#define __TRACE_EVENT_PERF_PERM(name, expr...)				\
	static int perf_perm_##name(struct trace_event_call *tp_event, \
				    struct perf_event *p_event)		\
	{								\
		return ({ expr; });					\
	}								\
	static int __init trace_init_perf_perm_##name(void)		\
	{								\
		event_##name.perf_perm = &perf_perm_##name;		\
		return 0;						\
	}								\
	early_initcall(trace_init_perf_perm_##name);

#define PERF_MAX_TRACE_SIZE	8192

#define MAX_FILTER_STR_VAL	256U	/* Should handle KSYM_SYMBOL_LEN */

enum event_trigger_type {
	ETT_NONE		= (0),
	ETT_TRACE_ONOFF		= (1 << 0),
	ETT_SNAPSHOT		= (1 << 1),
	ETT_STACKTRACE		= (1 << 2),
	ETT_EVENT_ENABLE	= (1 << 3),
	ETT_EVENT_HIST		= (1 << 4),
	ETT_HIST_ENABLE		= (1 << 5),
	ETT_EVENT_EPROBE	= (1 << 6),
};

extern int filter_match_preds(struct event_filter *filter, void *rec);

extern enum event_trigger_type
event_triggers_call(struct trace_event_file *file,
		    struct trace_buffer *buffer, void *rec,
		    struct ring_buffer_event *event);
extern void
event_triggers_post_call(struct trace_event_file *file,
			 enum event_trigger_type tt);

bool trace_event_ignore_this_pid(struct trace_event_file *trace_file);

bool __trace_trigger_soft_disabled(struct trace_event_file *file);

/**
 * trace_trigger_soft_disabled - do triggers and test if soft disabled
 * @file: The file pointer of the event to test
 *
 * If any triggers without filters are attached to this event, they
 * will be called here. If the event is soft disabled and has no
 * triggers that require testing the fields, it will return true,
 * otherwise false.
 */
static __always_inline bool
trace_trigger_soft_disabled(struct trace_event_file *file)
{
	unsigned long eflags = file->flags;

	if (likely(!(eflags & (EVENT_FILE_FL_TRIGGER_MODE |
			       EVENT_FILE_FL_SOFT_DISABLED |
			       EVENT_FILE_FL_PID_FILTER))))
		return false;

	if (likely(eflags & EVENT_FILE_FL_TRIGGER_COND))
		return false;

	return __trace_trigger_soft_disabled(file);
}

#ifdef CONFIG_BPF_EVENTS
unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx);
int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie);
void perf_event_detach_bpf_prog(struct perf_event *event);
int perf_event_query_prog_array(struct perf_event *event, void __user *info);
int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name);
void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp);
int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id,
			    u32 *fd_type, const char **buf,
			    u64 *probe_offset, u64 *probe_addr,
			    unsigned long *missed);
int bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
int bpf_uprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
#else
static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx)
{
	return 1;
}

static inline int
perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie)
{
	return -EOPNOTSUPP;
}

static inline void perf_event_detach_bpf_prog(struct perf_event *event) { }

static inline int
perf_event_query_prog_array(struct perf_event *event, void __user *info)
{
	return -EOPNOTSUPP;
}
static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
{
	return -EOPNOTSUPP;
}
static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
{
	return -EOPNOTSUPP;
}
static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name)
{
	return NULL;
}
static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp)
{
}
static inline int bpf_get_perf_event_info(const struct perf_event *event,
					  u32 *prog_id, u32 *fd_type,
					  const char **buf, u64 *probe_offset,
					  u64 *probe_addr, unsigned long *missed)
{
	return -EOPNOTSUPP;
}
static inline int
bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
{
	return -EOPNOTSUPP;
}
static inline int
bpf_uprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
{
	return -EOPNOTSUPP;
}
#endif

enum {
	FILTER_OTHER = 0,
	FILTER_STATIC_STRING,
	FILTER_DYN_STRING,
	FILTER_RDYN_STRING,
	FILTER_PTR_STRING,
	FILTER_TRACE_FN,
	FILTER_CPUMASK,
	FILTER_COMM,
	FILTER_CPU,
	FILTER_STACKTRACE,
};

extern int trace_event_raw_init(struct trace_event_call *call);
extern int trace_define_field(struct trace_event_call *call, const char *type,
			      const char *name, int offset, int size,
			      int is_signed, int filter_type);
extern int trace_add_event_call(struct trace_event_call *call);
extern int trace_remove_event_call(struct trace_event_call *call);
extern int trace_event_get_offsets(struct trace_event_call *call);

int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set);
int trace_set_clr_event(const char *system, const char *event, int set);
int trace_array_set_clr_event(struct trace_array *tr, const char *system,
		const char *event, bool enable);
/*
 * The double __builtin_constant_p is because gcc will give us an error
 * if we try to allocate the static variable to fmt if it is not a
 * constant. Even with the outer if statement optimizing out.
 */
#define event_trace_printk(ip, fmt, args...)				\
do {									\
	__trace_printk_check_format(fmt, ##args);			\
	tracing_record_cmdline(current);				\
	if (__builtin_constant_p(fmt)) {				\
		static const char *trace_printk_fmt			\
		  __section("__trace_printk_fmt") =			\
			__builtin_constant_p(fmt) ? fmt : NULL;		\
									\
		__trace_bprintk(ip, trace_printk_fmt, ##args);		\
	} else								\
		__trace_printk(ip, fmt, ##args);			\
} while (0)

#ifdef CONFIG_PERF_EVENTS
struct perf_event;

DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);

extern int  perf_trace_init(struct perf_event *event);
extern void perf_trace_destroy(struct perf_event *event);
extern int  perf_trace_add(struct perf_event *event, int flags);
extern void perf_trace_del(struct perf_event *event, int flags);
#ifdef CONFIG_KPROBE_EVENTS
extern int  perf_kprobe_init(struct perf_event *event, bool is_retprobe);
extern void perf_kprobe_destroy(struct perf_event *event);
extern int bpf_get_kprobe_info(const struct perf_event *event,
			       u32 *fd_type, const char **symbol,
			       u64 *probe_offset, u64 *probe_addr,
			       unsigned long *missed,
			       bool perf_type_tracepoint);
#endif
#ifdef CONFIG_UPROBE_EVENTS
extern int  perf_uprobe_init(struct perf_event *event,
			     unsigned long ref_ctr_offset, bool is_retprobe);
extern void perf_uprobe_destroy(struct perf_event *event);
extern int bpf_get_uprobe_info(const struct perf_event *event,
			       u32 *fd_type, const char **filename,
			       u64 *probe_offset, u64 *probe_addr,
			       bool perf_type_tracepoint);
#endif
extern int  ftrace_profile_set_filter(struct perf_event *event, int event_id,
				     char *filter_str);
extern void ftrace_profile_free_filter(struct perf_event *event);
void perf_trace_buf_update(void *record, u16 type);
void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp);

int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie);
void perf_event_free_bpf_prog(struct perf_event *event);

void bpf_trace_run1(struct bpf_prog *prog, u64 arg1);
void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2);
void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2,
		    u64 arg3);
void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2,
		    u64 arg3, u64 arg4);
void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2,
		    u64 arg3, u64 arg4, u64 arg5);
void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2,
		    u64 arg3, u64 arg4, u64 arg5, u64 arg6);
void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2,
		    u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7);
void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2,
		    u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
		    u64 arg8);
void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2,
		    u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
		    u64 arg8, u64 arg9);
void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2,
		     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
		     u64 arg8, u64 arg9, u64 arg10);
void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2,
		     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
		     u64 arg8, u64 arg9, u64 arg10, u64 arg11);
void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2,
		     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
		     u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12);
void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx,
			       struct trace_event_call *call, u64 count,
			       struct pt_regs *regs, struct hlist_head *head,
			       struct task_struct *task);

static inline void
perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type,
		       u64 count, struct pt_regs *regs, void *head,
		       struct task_struct *task)
{
	perf_tp_event(type, count, raw_data, size, regs, head, rctx, task);
}

#endif

#define TRACE_EVENT_STR_MAX	512

/*
 * gcc warns that you can not use a va_list in an inlined
 * function. But lets me make it into a macro :-/
 */
#define __trace_event_vstr_len(fmt, va)			\
({							\
	va_list __ap;					\
	int __ret;					\
							\
	va_copy(__ap, *(va));				\
	__ret = vsnprintf(NULL, 0, fmt, __ap) + 1;	\
	va_end(__ap);					\
							\
	min(__ret, TRACE_EVENT_STR_MAX);		\
})

#endif /* _LINUX_TRACE_EVENT_H */

/*
 * Note: we keep the TRACE_CUSTOM_EVENT outside the include file ifdef protection.
 *  This is due to the way trace custom events work. If a file includes two
 *  trace event headers under one "CREATE_CUSTOM_TRACE_EVENTS" the first include
 *  will override the TRACE_CUSTOM_EVENT and break the second include.
 */

#ifndef TRACE_CUSTOM_EVENT

#define DECLARE_CUSTOM_EVENT_CLASS(name, proto, args, tstruct, assign, print)
#define DEFINE_CUSTOM_EVENT(template, name, proto, args)
#define TRACE_CUSTOM_EVENT(name, proto, args, struct, assign, print)

#endif /* ifdef TRACE_CUSTOM_EVENT (see note above) */
¿Qué es la limpieza dental de perros? - Clínica veterinaria


Es la eliminación del sarro y la placa adherida a la superficie de los dientes mediante un equipo de ultrasonidos que garantiza la integridad de las piezas dentales a la vez que elimina en profundidad cualquier resto de suciedad.

A continuación se procede al pulido de los dientes mediante una fresa especial que elimina la placa bacteriana y devuelve a los dientes el aspecto sano que deben tener.

Una vez terminado todo el proceso, se mantiene al perro en observación hasta que se despierta de la anestesia, bajo la atenta supervisión de un veterinario.

¿Cada cuánto tiempo tengo que hacerle una limpieza dental a mi perro?

A partir de cierta edad, los perros pueden necesitar una limpieza dental anual o bianual. Depende de cada caso. En líneas generales, puede decirse que los perros de razas pequeñas suelen acumular más sarro y suelen necesitar una atención mayor en cuanto a higiene dental.


Riesgos de una mala higiene


Los riesgos más evidentes de una mala higiene dental en los perros son los siguientes:

  • Cuando la acumulación de sarro no se trata, se puede producir una inflamación y retracción de las encías que puede descalzar el diente y provocar caídas.
  • Mal aliento (halitosis).
  • Sarro perros
  • Puede ir a más
  • Las bacterias de la placa pueden trasladarse a través del torrente circulatorio a órganos vitales como el corazón ocasionando problemas de endocarditis en las válvulas. Las bacterias pueden incluso acantonarse en huesos (La osteomielitis es la infección ósea, tanto cortical como medular) provocando mucho dolor y una artritis séptica).

¿Cómo se forma el sarro?

El sarro es la calcificación de la placa dental. Los restos de alimentos, junto con las bacterias presentes en la boca, van a formar la placa bacteriana o placa dental. Si la placa no se retira, al mezclarse con la saliva y los minerales presentes en ella, reaccionará formando una costra. La placa se calcifica y se forma el sarro.

El sarro, cuando se forma, es de color blanquecino pero a medida que pasa el tiempo se va poniendo amarillo y luego marrón.

Síntomas de una pobre higiene dental
La señal más obvia de una mala salud dental canina es el mal aliento.

Sin embargo, a veces no es tan fácil de detectar
Y hay perros que no se dejan abrir la boca por su dueño. Por ejemplo…

Recientemente nos trajeron a la clínica a un perro que parpadeaba de un ojo y decía su dueño que le picaba un lado de la cara. Tenía molestias y dificultad para comer, lo que había llevado a sus dueños a comprarle comida blanda (que suele ser un poco más cara y llevar más contenido en grasa) durante medio año. Después de una exploración oftalmológica, nos dimos cuenta de que el ojo tenía una úlcera en la córnea probablemente de rascarse . Además, el canto lateral del ojo estaba inflamado. Tenía lo que en humanos llamamos flemón pero como era un perro de pelo largo, no se le notaba a simple vista. Al abrirle la boca nos llamó la atención el ver una muela llena de sarro. Le realizamos una radiografía y encontramos una fístula que llegaba hasta la parte inferior del ojo.

Le tuvimos que extraer la muela. Tras esto, el ojo se curó completamente con unos colirios y una lentilla protectora de úlcera. Afortunadamente, la úlcera no profundizó y no perforó el ojo. Ahora el perro come perfectamente a pesar de haber perdido una muela.

¿Cómo mantener la higiene dental de tu perro?
Hay varias maneras de prevenir problemas derivados de la salud dental de tu perro.

Limpiezas de dientes en casa
Es recomendable limpiar los dientes de tu perro semanal o diariamente si se puede. Existe una gran variedad de productos que se pueden utilizar:

Pastas de dientes.
Cepillos de dientes o dedales para el dedo índice, que hacen más fácil la limpieza.
Colutorios para echar en agua de bebida o directamente sobre el diente en líquido o en spray.

En la Clínica Tus Veterinarios enseñamos a nuestros clientes a tomar el hábito de limpiar los dientes de sus perros desde que son cachorros. Esto responde a nuestro compromiso con la prevención de enfermedades caninas.

Hoy en día tenemos muchos clientes que limpian los dientes todos los días a su mascota, y como resultado, se ahorran el dinero de hacer limpiezas dentales profesionales y consiguen una mejor salud de su perro.


Limpiezas dentales profesionales de perros y gatos

Recomendamos hacer una limpieza dental especializada anualmente. La realizamos con un aparato de ultrasonidos que utiliza agua para quitar el sarro. Después, procedemos a pulir los dientes con un cepillo de alta velocidad y una pasta especial. Hacemos esto para proteger el esmalte.

La frecuencia de limpiezas dentales necesaria varía mucho entre razas. En general, las razas grandes tienen buena calidad de esmalte, por lo que no necesitan hacerlo tan a menudo e incluso pueden pasarse la vida sin requerir una limpieza. Sin embargo, razas pequeñas como el Yorkshire o el Maltés, deben hacérselas todos los años desde cachorros si se quiere conservar sus piezas dentales.

Otro factor fundamental es la calidad del pienso. Algunas marcas han diseñado croquetas que limpian la superficie del diente y de la muela al masticarse.

Ultrasonido para perros

¿Se necesita anestesia para las limpiezas dentales de perros y gatos?

La limpieza dental en perros no es una técnica que pueda practicarse sin anestesia general , aunque hay veces que los propietarios no quieren anestesiar y si tiene poco sarro y el perro es muy bueno se puede intentar…… , pero no se va a poder pulir ni acceder a todas la zona de la boca …. Además los limpiadores dentales van a irrigar agua y hay riesgo de aspiración a vías respiratorias si no se realiza una anestesia correcta con intubación traqueal . En resumen , sin anestesia no se va hacer una correcta limpieza dental.

Tampoco sirve la sedación ya que necesitamos que el animal esté totalmente quieto, y el veterinario tenga un acceso completo a todas sus piezas dentales y encías.

Alimentos para la limpieza dental

Hay que tener cierto cuidado a la hora de comprar determinados alimentos porque no todos son saludables. Algunos tienen demasiado contenido graso, que en exceso puede causar problemas cardiovasculares y obesidad.

Los mejores alimentos para los dientes son aquellos que están elaborados por empresas farmacéuticas y llevan componentes químicos con tratamientos específicos para el diente del perro. Esto implica no solo limpieza a través de la acción mecánica de morder sino también un tratamiento antibacteriano para prevenir el sarro.

Conclusión

Si eres como la mayoría de dueños, por falta de tiempo , es probable que no estés prestando la suficiente atención a la limpieza dental de tu perro. Por eso te animamos a que comiences a limpiar los dientes de tu perro y consideres atender a su higiene bucal con frecuencia.

Estas simples medidas pueden conllevar a que tu perro tenga una vida más larga y mucho más saludable.

Si te resulta imposible introducir un cepillo de dientes a tu perro en la boca, pásate con él por clínica Tus Veterinarios y te explicamos cómo hacerlo.

Necesitas hacer una limpieza dental profesional a tu mascota?
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