| /* 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 <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; |
| }; |
| |
| extern pthread_mutex_t toplevel_lock; |
| |
| static inline pthread_mutex_t *trace_get_lock(struct tracefs_instance *instance) |
| { |
| return instance ? &instance->lock : &toplevel_lock; |
| } |
| |
| void trace_put_instance(struct tracefs_instance *instance); |
| int trace_get_instance(struct tracefs_instance *instance); |
| |
| /* Can be overridden */ |
| void tracefs_warning(const char *fmt, ...); |
| |
| int str_read_file(const char *file, char **buffer, bool warn); |
| char *trace_append_file(const char *dir, const char *name); |
| char *trace_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 * |
| supported_opts_mask(struct tracefs_instance *instance); |
| |
| struct tracefs_options_mask * |
| enabled_opts_mask(struct tracefs_instance *instance); |
| |
| char **trace_list_create_empty(void); |
| int trace_list_pop(char **list); |
| |
| char *append_string(char *str, const char *delim, const char *add); |
| int trace_test_state(int state); |
| bool trace_verify_event_field(struct tep_event *event, |
| const char *field_name, |
| const struct tep_format_field **ptr_field); |
| int trace_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); |
| |
| struct tracefs_synth *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 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 * |
| dynevent_alloc(enum tracefs_dynevent_type type, const char *system, |
| const char *event, const char *address, const char *format); |
| int dynevent_get_count(unsigned int types, const char *system); |
| |
| int trace_load_events(struct tep_handle *tep, |
| const char *tracing_dir, const char *system); |
| int trace_rescan_events(struct tep_handle *tep, |
| const char *tracing_dir, const char *system); |
| struct tep_event *get_tep_event(struct tep_handle *tep, |
| const char *system, const char *name); |
| |
| unsigned int quick_hash(const char *str); |
| |
| #endif /* _TRACE_FS_LOCAL_H */ |