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/* SPDX-License-Identifier: LGPL-2.1 */
/*
* Copyright (C) 2019, VMware, Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
*
*/
#ifndef _TRACE_FS_LOCAL_H
#define _TRACE_FS_LOCAL_H
#include <tracefs.h>
#include <pthread.h>
#define __hidden __attribute__((visibility ("hidden")))
#define __weak __attribute__((weak))
#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
/* Will cause a division by zero warning if cond is true */
#define BUILD_BUG_ON(cond) \
do { if (!(1/!(cond))) { } } while (0)
#define HASH_BITS 10
struct tracefs_options_mask {
unsigned long long mask;
};
struct follow_event {
struct tep_event *event;
void *callback_data;
int (*callback)(struct tep_event *,
struct tep_record *,
int, void *);
};
struct tracefs_instance {
struct tracefs_options_mask supported_opts;
struct tracefs_options_mask enabled_opts;
struct follow_event *followers;
struct follow_event *missed_followers;
char *trace_dir;
char *name;
pthread_mutex_t lock;
int ref;
int flags;
int ftrace_filter_fd;
int ftrace_notrace_fd;
int ftrace_marker_fd;
int ftrace_marker_raw_fd;
int nr_followers;
int nr_missed_followers;
bool pipe_keep_going;
bool iterate_keep_going;
};
struct tracefs_buffer_stat {
ssize_t entries;
ssize_t overrun;
ssize_t commit_overrun;
ssize_t bytes;
long long oldest_ts;
long long now_ts;
ssize_t dropped_events;
ssize_t read_events;
};
extern const struct tep_format_field tfs_common_stacktrace;
extern pthread_mutex_t tfs_toplevel_lock;
static inline pthread_mutex_t *trace_get_lock(struct tracefs_instance *instance)
{
return instance ? &instance->lock : &tfs_toplevel_lock;
}
void tfs_put_instance(struct tracefs_instance *instance);
int tfs_get_instance(struct tracefs_instance *instance);
/* Can be overridden */
void tracefs_warning(const char *fmt, ...);
char *tfs_strstrip(char *str);
int tfs_str_read_file(const char *file, char **buffer, bool warn);
char *tfs_append_file(const char *dir, const char *name);
char *tfs_find_tracing_dir(bool debugfs);
#ifndef ACCESSPERMS
#define ACCESSPERMS (S_IRWXU|S_IRWXG|S_IRWXO) /* 0777 */
#endif
#ifndef ALLPERMS
#define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO) /* 07777 */
#endif
#ifndef DEFFILEMODE
#define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) /* 0666*/
#endif
struct tracefs_options_mask *
tfs_supported_opts_mask(struct tracefs_instance *instance);
struct tracefs_options_mask *
tfs_enabled_opts_mask(struct tracefs_instance *instance);
char **tfs_list_create_empty(void);
int tfs_list_pop(char **list);
char *tfs_append_string(char *str, const char *delim, const char *add);
int tfs_test_state(int state);
bool tfs_verify_event_field(struct tep_event *event,
const char *field_name,
const struct tep_format_field **ptr_field);
int tfs_append_filter(char **filter, unsigned int *state,
unsigned int *open_parens,
struct tep_event *event,
enum tracefs_filter type,
const char *field_name,
enum tracefs_compare compare,
const char *val);
void *tfs_mmap(int fd, struct kbuffer *kbuf);
void tfs_unmap(void *mapping);
int tfs_mmap_load_subbuf(void *mapping, struct kbuffer *kbuf);
int tfs_mmap_read(void *mapping, void *buffer);
struct tracefs_synth *
tfs_synth_init_from(struct tep_handle *tep,
const char *start_system,
const char *start_event);
#define HIST_COUNTER_TYPE (TRACEFS_HIST_KEY_MAX + 100)
int tfs_synth_add_start_field(struct tracefs_synth *synth,
const char *start_field,
const char *name,
enum tracefs_hist_key_type type,
int cnt);
/* Internal interface for ftrace dynamic events */
struct tracefs_dynevent {
char *trace_file;
char *prefix;
char *system;
char *event;
char *address;
char *format;
enum tracefs_dynevent_type type;
};
struct tracefs_dynevent *
tfs_dynevent_alloc(enum tracefs_dynevent_type type, const char *system,
const char *event, const char *address, const char *format);
int tfs_dynevent_get_count(unsigned int types, const char *system);
int tfs_load_events(struct tep_handle *tep,
const char *tracing_dir,
const char *system);
int tfs_rescan_events(struct tep_handle *tep,
const char *tracing_dir,
const char *system);
struct tep_event *
tfs_get_tep_event(struct tep_handle *tep,
const char *system,
const char *name);
unsigned int tfs_quick_hash(const char *str);
#endif /* _TRACE_FS_LOCAL_H */
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