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Diffstat (limited to '')
| -rw-r--r-- | include/tracefs-local.h | 141 | ||||
| -rw-r--r-- | include/tracefs.h | 637 |
2 files changed, 778 insertions, 0 deletions
diff --git a/include/tracefs-local.h b/include/tracefs-local.h new file mode 100644 index 0000000..2007d26 --- /dev/null +++ b/include/tracefs-local.h @@ -0,0 +1,141 @@ +/* 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 */ diff --git a/include/tracefs.h b/include/tracefs.h new file mode 100644 index 0000000..3547b5a --- /dev/null +++ b/include/tracefs.h @@ -0,0 +1,637 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ +/* + * Copyright (C) 2019, VMware, Tzvetomir Stoyanov <tz.stoyanov@gmail.com> + * + */ +#ifndef _TRACE_FS_H +#define _TRACE_FS_H + +#include <fcntl.h> +#include <sched.h> +#include <event-parse.h> + +char *tracefs_get_tracing_file(const char *name); +void tracefs_put_tracing_file(char *name); + +/* the returned string must *not* be freed */ +const char *tracefs_tracing_dir(void); +const char *tracefs_debug_dir(void); +int tracefs_set_tracing_dir(char *tracing_dir); +int tracefs_tracing_dir_is_mounted(bool mount, const char **path); + +/* ftrace instances */ +struct tracefs_instance; + +void tracefs_instance_free(struct tracefs_instance *instance); +struct tracefs_instance *tracefs_instance_create(const char *name); +struct tracefs_instance *tracefs_instance_alloc(const char *tracing_dir, + const char *name); +int tracefs_instance_destroy(struct tracefs_instance *instance); +bool tracefs_instance_is_new(struct tracefs_instance *instance); +const char *tracefs_instance_get_name(struct tracefs_instance *instance); +const char *tracefs_instance_get_trace_dir(struct tracefs_instance *instance); +char * +tracefs_instance_get_file(struct tracefs_instance *instance, const char *file); +char *tracefs_instance_get_dir(struct tracefs_instance *instance); +int tracefs_instance_file_write(struct tracefs_instance *instance, + const char *file, const char *str); +int tracefs_instance_file_append(struct tracefs_instance *instance, + const char *file, const char *str); +int tracefs_instance_file_clear(struct tracefs_instance *instance, + const char *file); +char *tracefs_instance_file_read(struct tracefs_instance *instance, + const char *file, int *psize); +int tracefs_instance_file_read_number(struct tracefs_instance *instance, + const char *file, long long *res); +int tracefs_instance_file_open(struct tracefs_instance *instance, + const char *file, int mode); +int tracefs_instances_walk(int (*callback)(const char *, void *), void *context); +int tracefs_instance_set_affinity_set(struct tracefs_instance *instance, + cpu_set_t *set, size_t set_size); +int tracefs_instance_set_affinity_raw(struct tracefs_instance *instance, + const char *mask); +int tracefs_instance_set_affinity(struct tracefs_instance *instance, + const char *cpu_str); +char *tracefs_instance_get_affinity(struct tracefs_instance *instance); +char *tracefs_instance_get_affinity_raw(struct tracefs_instance *instance); +int tracefs_instance_get_affinity_set(struct tracefs_instance *instance, + cpu_set_t *set, size_t set_size); +ssize_t tracefs_instance_get_buffer_size(struct tracefs_instance *instance, int cpu); +int tracefs_instance_set_buffer_size(struct tracefs_instance *instance, size_t size, int cpu); +char **tracefs_instances(const char *regex); + +bool tracefs_instance_exists(const char *name); +bool tracefs_file_exists(struct tracefs_instance *instance, const char *name); +bool tracefs_dir_exists(struct tracefs_instance *instance, const char *name); + +int tracefs_trace_is_on(struct tracefs_instance *instance); +int tracefs_trace_on(struct tracefs_instance *instance); +int tracefs_trace_off(struct tracefs_instance *instance); +int tracefs_trace_on_fd(int fd); +int tracefs_trace_off_fd(int fd); + +enum tracefs_enable_state { + TRACEFS_ERROR = -1, + TRACEFS_ALL_DISABLED = 0, + TRACEFS_ALL_ENABLED = 1, + TRACEFS_SOME_ENABLED = 2, +}; + +int tracefs_event_enable(struct tracefs_instance *instance, const char *system, const char *event); +int tracefs_event_disable(struct tracefs_instance *instance, const char *system, const char *event); +enum tracefs_enable_state tracefs_event_is_enabled(struct tracefs_instance *instance, + const char *system, const char *event); + +char *tracefs_error_last(struct tracefs_instance *instance); +char *tracefs_error_all(struct tracefs_instance *instance); +int tracefs_error_clear(struct tracefs_instance *instance); + +void tracefs_list_free(char **list); +char **tracefs_list_add(char **list, const char *string); +int tracefs_list_size(char **list); + +bool tracefs_tracer_available(const char *tracing_dir, const char *tracer); + +/** + * tracefs_trace_on_get_fd - Get a file descriptor of "tracing_on" in given instance + * @instance: ftrace instance, can be NULL for the top instance + * + * Returns -1 in case of an error, or a valid file descriptor to "tracing_on" + * file for reading and writing.The returned FD must be closed with close(). + */ +static inline int tracefs_trace_on_get_fd(struct tracefs_instance *instance) +{ + return tracefs_instance_file_open(instance, "tracing_on", O_RDWR); +} + +/* trace print string*/ +int tracefs_print_init(struct tracefs_instance *instance); +int tracefs_printf(struct tracefs_instance *instance, const char *fmt, ...); +int tracefs_vprintf(struct tracefs_instance *instance, const char *fmt, va_list ap); +void tracefs_print_close(struct tracefs_instance *instance); + +/* trace write binary data*/ +int tracefs_binary_init(struct tracefs_instance *instance); +int tracefs_binary_write(struct tracefs_instance *instance, void *data, int len); +void tracefs_binary_close(struct tracefs_instance *instance); + +/* events */ +char **tracefs_event_systems(const char *tracing_dir); +char **tracefs_system_events(const char *tracing_dir, const char *system); +int tracefs_iterate_raw_events(struct tep_handle *tep, + struct tracefs_instance *instance, + cpu_set_t *cpus, int cpu_size, + int (*callback)(struct tep_event *, + struct tep_record *, + int, void *), + void *callback_context); +void tracefs_iterate_stop(struct tracefs_instance *instance); +int tracefs_follow_event(struct tep_handle *tep, struct tracefs_instance *instance, + const char *system, const char *event_name, + int (*callback)(struct tep_event *, + struct tep_record *, + int, void *), + void *callback_data); +int tracefs_follow_missed_events(struct tracefs_instance *instance, + int (*callback)(struct tep_event *, + struct tep_record *, + int, void *), + void *callback_data); + +char *tracefs_event_get_file(struct tracefs_instance *instance, + const char *system, const char *event, + const char *file); +char *tracefs_event_file_read(struct tracefs_instance *instance, + const char *system, const char *event, + const char *file, int *psize); +int tracefs_event_file_write(struct tracefs_instance *instance, + const char *system, const char *event, + const char *file, const char *str); +int tracefs_event_file_append(struct tracefs_instance *instance, + const char *system, const char *event, + const char *file, const char *str); +int tracefs_event_file_clear(struct tracefs_instance *instance, + const char *system, const char *event, + const char *file); +bool tracefs_event_file_exists(struct tracefs_instance *instance, + const char *system, const char *event, + const char *file); + +char **tracefs_tracers(const char *tracing_dir); + +struct tep_handle *tracefs_local_events(const char *tracing_dir); +struct tep_handle *tracefs_local_events_system(const char *tracing_dir, + const char * const *sys_names); +int tracefs_fill_local_events(const char *tracing_dir, + struct tep_handle *tep, int *parsing_failures); + +int tracefs_load_cmdlines(const char *tracing_dir, struct tep_handle *tep); + +char *tracefs_get_clock(struct tracefs_instance *instance); + +enum tracefs_option_id { + TRACEFS_OPTION_INVALID = 0, + TRACEFS_OPTION_ANNOTATE, + TRACEFS_OPTION_BIN, + TRACEFS_OPTION_BLK_CGNAME, + TRACEFS_OPTION_BLK_CGROUP, + TRACEFS_OPTION_BLK_CLASSIC, + TRACEFS_OPTION_BLOCK, + TRACEFS_OPTION_CONTEXT_INFO, + TRACEFS_OPTION_DISABLE_ON_FREE, + TRACEFS_OPTION_DISPLAY_GRAPH, + TRACEFS_OPTION_EVENT_FORK, + TRACEFS_OPTION_FGRAPH_ABSTIME, + TRACEFS_OPTION_FGRAPH_CPU, + TRACEFS_OPTION_FGRAPH_DURATION, + TRACEFS_OPTION_FGRAPH_IRQS, + TRACEFS_OPTION_FGRAPH_OVERHEAD, + TRACEFS_OPTION_FGRAPH_OVERRUN, + TRACEFS_OPTION_FGRAPH_PROC, + TRACEFS_OPTION_FGRAPH_TAIL, + TRACEFS_OPTION_FUNC_STACKTRACE, + TRACEFS_OPTION_FUNCTION_FORK, + TRACEFS_OPTION_FUNCTION_TRACE, + TRACEFS_OPTION_GRAPH_TIME, + TRACEFS_OPTION_HEX, + TRACEFS_OPTION_IRQ_INFO, + TRACEFS_OPTION_LATENCY_FORMAT, + TRACEFS_OPTION_MARKERS, + TRACEFS_OPTION_OVERWRITE, + TRACEFS_OPTION_PAUSE_ON_TRACE, + TRACEFS_OPTION_PRINTK_MSG_ONLY, + TRACEFS_OPTION_PRINT_PARENT, + TRACEFS_OPTION_RAW, + TRACEFS_OPTION_RECORD_CMD, + TRACEFS_OPTION_RECORD_TGID, + TRACEFS_OPTION_SLEEP_TIME, + TRACEFS_OPTION_STACKTRACE, + TRACEFS_OPTION_SYM_ADDR, + TRACEFS_OPTION_SYM_OFFSET, + TRACEFS_OPTION_SYM_USEROBJ, + TRACEFS_OPTION_TRACE_PRINTK, + TRACEFS_OPTION_USERSTACKTRACE, + TRACEFS_OPTION_VERBOSE, +}; +#define TRACEFS_OPTION_MAX (TRACEFS_OPTION_VERBOSE + 1) + +struct tracefs_options_mask; +bool tracefs_option_mask_is_set(const struct tracefs_options_mask *options, + enum tracefs_option_id id); +const struct tracefs_options_mask *tracefs_options_get_supported(struct tracefs_instance *instance); +bool tracefs_option_is_supported(struct tracefs_instance *instance, enum tracefs_option_id id); +const struct tracefs_options_mask *tracefs_options_get_enabled(struct tracefs_instance *instance); +bool tracefs_option_is_enabled(struct tracefs_instance *instance, enum tracefs_option_id id); +int tracefs_option_enable(struct tracefs_instance *instance, enum tracefs_option_id id); +int tracefs_option_disable(struct tracefs_instance *instance, enum tracefs_option_id id); +const char *tracefs_option_name(enum tracefs_option_id id); +enum tracefs_option_id tracefs_option_id(const char *name); + +/* + * RESET - Reset on opening filter file (O_TRUNC) + * CONTINUE - Do not close filter file on return. + * FUTURE - For kernels that support this feature, enable filters for + * a module that has yet to be loaded. + */ +enum { + TRACEFS_FL_RESET = (1 << 0), + TRACEFS_FL_CONTINUE = (1 << 1), + TRACEFS_FL_FUTURE = (1 << 2), +}; + +int tracefs_function_filter(struct tracefs_instance *instance, const char *filter, + const char *module, unsigned int flags); +int tracefs_function_notrace(struct tracefs_instance *instance, const char *filter, + const char *module, unsigned int flags); +int tracefs_filter_functions(const char *filter, const char *module, char ***list); + + +/* Control library logs */ +void tracefs_set_loglevel(enum tep_loglevel level); + +enum tracefs_tracers { + TRACEFS_TRACER_NOP = 0, + TRACEFS_TRACER_CUSTOM, + TRACEFS_TRACER_FUNCTION, + TRACEFS_TRACER_FUNCTION_GRAPH, + TRACEFS_TRACER_IRQSOFF, + TRACEFS_TRACER_PREEMPTOFF, + TRACEFS_TRACER_PREEMPTIRQSOFF, + TRACEFS_TRACER_WAKEUP, + TRACEFS_TRACER_WAKEUP_RT, + TRACEFS_TRACER_WAKEUP_DL, + TRACEFS_TRACER_MMIOTRACE, + TRACEFS_TRACER_HWLAT, + TRACEFS_TRACER_BRANCH, + TRACEFS_TRACER_BLOCK, +}; + +int tracefs_tracer_set(struct tracefs_instance *instance, enum tracefs_tracers tracer, ...); + +int tracefs_tracer_clear(struct tracefs_instance *instance); + +ssize_t tracefs_trace_pipe_stream(int fd, struct tracefs_instance *instance, int flags); +ssize_t tracefs_trace_pipe_print(struct tracefs_instance *instance, int flags); +void tracefs_trace_pipe_stop(struct tracefs_instance *instance); + +/* Dynamic events */ +struct tracefs_dynevent; +enum tracefs_dynevent_type { + TRACEFS_DYNEVENT_UNKNOWN = 0, + TRACEFS_DYNEVENT_KPROBE = 1 << 0, + TRACEFS_DYNEVENT_KRETPROBE = 1 << 1, + TRACEFS_DYNEVENT_UPROBE = 1 << 2, + TRACEFS_DYNEVENT_URETPROBE = 1 << 3, + TRACEFS_DYNEVENT_EPROBE = 1 << 4, + TRACEFS_DYNEVENT_SYNTH = 1 << 5, + TRACEFS_DYNEVENT_MAX = 1 << 6, +}; + +#define TRACEFS_DYNEVENT_ALL 0xFFFFFFFF + +int tracefs_dynevent_create(struct tracefs_dynevent *devent); +int tracefs_dynevent_destroy(struct tracefs_dynevent *devent, bool force); +int tracefs_dynevent_destroy_all(unsigned int types, bool force); +void tracefs_dynevent_free(struct tracefs_dynevent *devent); +void tracefs_dynevent_list_free(struct tracefs_dynevent **events); +struct tracefs_dynevent ** +tracefs_dynevent_get_all(unsigned int types, const char *system); +struct tracefs_dynevent * +tracefs_dynevent_get(enum tracefs_dynevent_type type, const char *system, const char *event); +enum tracefs_dynevent_type +tracefs_dynevent_info(struct tracefs_dynevent *dynevent, char **system, + char **event, char **prefix, char **addr, char **format); +struct tep_event * +tracefs_dynevent_get_event(struct tep_handle *tep, struct tracefs_dynevent *dynevent); + +struct tracefs_dynevent * +tracefs_eprobe_alloc(const char *system, const char *event, + const char *target_system, const char *target_event, const char *fetchargs); +struct tracefs_dynevent * +tracefs_uprobe_alloc(const char *system, const char *event, + const char *file, unsigned long long offset, const char *fetchargs); +struct tracefs_dynevent * +tracefs_uretprobe_alloc(const char *system, const char *event, + const char *file, unsigned long long offset, const char *fetchargs); + +struct tracefs_dynevent * +tracefs_kprobe_alloc(const char *system, const char *event, const char *addr, const char *format); +struct tracefs_dynevent * +tracefs_kretprobe_alloc(const char *system, const char *event, + const char *addr, const char *format, unsigned int max); +int tracefs_kprobe_raw(const char *system, const char *event, + const char *addr, const char *format); +int tracefs_kretprobe_raw(const char *system, const char *event, + const char *addr, const char *format); + +enum tracefs_hist_key_type { + TRACEFS_HIST_KEY_NORMAL = 0, + TRACEFS_HIST_KEY_HEX, + TRACEFS_HIST_KEY_SYM, + TRACEFS_HIST_KEY_SYM_OFFSET, + TRACEFS_HIST_KEY_SYSCALL, + TRACEFS_HIST_KEY_EXECNAME, + TRACEFS_HIST_KEY_LOG, + TRACEFS_HIST_KEY_USECS, + TRACEFS_HIST_KEY_BUCKETS, + TRACEFS_HIST_KEY_MAX +}; + +enum tracefs_hist_sort_direction { + TRACEFS_HIST_SORT_ASCENDING, + TRACEFS_HIST_SORT_DESCENDING, +}; + +#define TRACEFS_HIST_TIMESTAMP "common_timestamp" +#define TRACEFS_HIST_TIMESTAMP_USECS "common_timestamp.usecs" +#define TRACEFS_HIST_CPU "cpu" + +#define TRACEFS_HIST_COUNTER "__COUNTER__" + +#define TRACEFS_HIST_HITCOUNT "hitcount" + +struct tracefs_hist; + +enum tracefs_hist_command { + TRACEFS_HIST_CMD_START = 0, + TRACEFS_HIST_CMD_PAUSE, + TRACEFS_HIST_CMD_CONT, + TRACEFS_HIST_CMD_CLEAR, + TRACEFS_HIST_CMD_DESTROY, +}; + +enum tracefs_filter { + TRACEFS_FILTER_COMPARE, + TRACEFS_FILTER_AND, + TRACEFS_FILTER_OR, + TRACEFS_FILTER_NOT, + TRACEFS_FILTER_OPEN_PAREN, + TRACEFS_FILTER_CLOSE_PAREN, +}; + +enum tracefs_compare { + TRACEFS_COMPARE_EQ, + TRACEFS_COMPARE_NE, + TRACEFS_COMPARE_GT, + TRACEFS_COMPARE_GE, + TRACEFS_COMPARE_LT, + TRACEFS_COMPARE_LE, + TRACEFS_COMPARE_RE, + TRACEFS_COMPARE_AND, +}; + +void tracefs_hist_free(struct tracefs_hist *hist); +struct tracefs_hist * +tracefs_hist_alloc(struct tep_handle *tep, + const char *system, const char *event_name, + const char *key, enum tracefs_hist_key_type type); +struct tracefs_hist * +tracefs_hist_alloc_2d(struct tep_handle *tep, + const char *system, const char *event_name, + const char *key1, enum tracefs_hist_key_type type1, + const char *key2, enum tracefs_hist_key_type type2); + +struct tracefs_hist_axis { + const char *key; + enum tracefs_hist_key_type type; +}; + +struct tracefs_hist_axis_cnt { + const char *key; + enum tracefs_hist_key_type type; + int cnt; +}; + +struct tracefs_hist * +tracefs_hist_alloc_nd(struct tep_handle *tep, + const char *system, const char *event_name, + struct tracefs_hist_axis *axes); +struct tracefs_hist * +tracefs_hist_alloc_nd_cnt(struct tep_handle *tep, + const char *system, const char *event_name, + struct tracefs_hist_axis_cnt *axes); +const char *tracefs_hist_get_name(struct tracefs_hist *hist); +const char *tracefs_hist_get_event(struct tracefs_hist *hist); +const char *tracefs_hist_get_system(struct tracefs_hist *hist); +int tracefs_hist_add_key(struct tracefs_hist *hist, const char *key, + enum tracefs_hist_key_type type); +int tracefs_hist_add_key_cnt(struct tracefs_hist *hist, const char *key, + enum tracefs_hist_key_type type, int cnt); +int tracefs_hist_add_value(struct tracefs_hist *hist, const char *value); +int tracefs_hist_add_sort_key(struct tracefs_hist *hist, + const char *sort_key); +int tracefs_hist_set_sort_key(struct tracefs_hist *hist, + const char *sort_key, ...); +int tracefs_hist_sort_key_direction(struct tracefs_hist *hist, + const char *sort_key, + enum tracefs_hist_sort_direction dir); +int tracefs_hist_add_name(struct tracefs_hist *hist, const char *name); +int tracefs_hist_append_filter(struct tracefs_hist *hist, + enum tracefs_filter type, + const char *field, + enum tracefs_compare compare, + const char *val); +int tracefs_hist_echo_cmd(struct trace_seq *seq, struct tracefs_instance *instance, + struct tracefs_hist *hist, enum tracefs_hist_command command); +int tracefs_hist_command(struct tracefs_instance *instance, + struct tracefs_hist *hist, enum tracefs_hist_command cmd); + +/** + * tracefs_hist_start - enable a histogram + * @instance: The instance the histogram will be in (NULL for toplevel) + * @hist: The histogram to start + * + * Starts executing a histogram. + * + * Returns 0 on success, -1 on error. + */ +static inline int tracefs_hist_start(struct tracefs_instance *instance, + struct tracefs_hist *hist) +{ + return tracefs_hist_command(instance, hist, 0); +} + +/** + * tracefs_hist_pause - pause a histogram + * @instance: The instance the histogram is in (NULL for toplevel) + * @hist: The histogram to pause + * + * Pause a histogram. + * + * Returns 0 on success, -1 on error. + */ +static inline int tracefs_hist_pause(struct tracefs_instance *instance, + struct tracefs_hist *hist) +{ + return tracefs_hist_command(instance, hist, TRACEFS_HIST_CMD_PAUSE); +} + +/** + * tracefs_hist_continue - continue a paused histogram + * @instance: The instance the histogram is in (NULL for toplevel) + * @hist: The histogram to continue + * + * Continue a histogram. + * + * Returns 0 on success, -1 on error. + */ +static inline int tracefs_hist_continue(struct tracefs_instance *instance, + struct tracefs_hist *hist) +{ + return tracefs_hist_command(instance, hist, TRACEFS_HIST_CMD_CONT); +} + +/** + * tracefs_hist_reset - clear a histogram + * @instance: The instance the histogram is in (NULL for toplevel) + * @hist: The histogram to reset + * + * Resets a histogram. + * + * Returns 0 on success, -1 on error. + */ +static inline int tracefs_hist_reset(struct tracefs_instance *instance, + struct tracefs_hist *hist) +{ + return tracefs_hist_command(instance, hist, TRACEFS_HIST_CMD_CLEAR); +} + +/** + * tracefs_hist_destroy - deletes a histogram (needs to be enabled again) + * @instance: The instance the histogram is in (NULL for toplevel) + * @hist: The histogram to delete + * + * Deletes (removes) a running histogram. This is different than + * clear, as clear only clears the data but the histogram still exists. + * This deletes the histogram and should be called before + * tracefs_hist_free() to clean up properly. + * + * Returns 0 on success, -1 on error. + */ +static inline int tracefs_hist_destroy(struct tracefs_instance *instance, + struct tracefs_hist *hist) +{ + return tracefs_hist_command(instance, hist, TRACEFS_HIST_CMD_DESTROY); +} + +struct tracefs_synth; + +/* + * DELTA_END - end_field - start_field + * DELTA_START - start_field - end_field + * ADD - start_field + end_field + */ +enum tracefs_synth_calc { + TRACEFS_SYNTH_DELTA_END, + TRACEFS_SYNTH_DELTA_START, + TRACEFS_SYNTH_ADD, +}; + +int tracefs_filter_string_append(struct tep_event *event, char **filter, + enum tracefs_filter type, + const char *field, enum tracefs_compare compare, + const char *val); +int tracefs_filter_string_verify(struct tep_event *event, const char *filter, + char **err); + +int tracefs_event_filter_apply(struct tracefs_instance *instance, + struct tep_event *event, const char *filter); + +int tracefs_event_filter_clear(struct tracefs_instance *instance, + struct tep_event *event); + +/** Deprecated do not use: Instead use tracefs_filter_string_append() **/ +int tracefs_event_append_filter(struct tep_event *event, char **filter, + enum tracefs_filter type, + const char *field, enum tracefs_compare compare, + const char *val); + +/** Deprecated do not use: Instead use tracefs_filter_string_verify() **/ +int tracefs_event_verify_filter(struct tep_event *event, const char *filter, + char **err); + +#define TRACEFS_TIMESTAMP "common_timestamp" +#define TRACEFS_TIMESTAMP_USECS "common_timestamp.usecs" + +enum tracefs_synth_handler { + TRACEFS_SYNTH_HANDLE_NONE = 0, + TRACEFS_SYNTH_HANDLE_MATCH, + TRACEFS_SYNTH_HANDLE_MAX, + TRACEFS_SYNTH_HANDLE_CHANGE, +}; + +const char *tracefs_synth_get_name(struct tracefs_synth *synth); +struct tracefs_synth *tracefs_synth_alloc(struct tep_handle *tep, + const char *name, + const char *start_system, + const char *start_event, + const char *end_system, + const char *end_event, + const char *start_match_field, + const char *end_match_field, + const char *match_name); +int tracefs_synth_add_match_field(struct tracefs_synth *synth, + const char *start_match_field, + const char *end_match_field, + const char *name); +int tracefs_synth_add_compare_field(struct tracefs_synth *synth, + const char *start_compare_field, + const char *end_compare_field, + enum tracefs_synth_calc calc, + const char *name); +int tracefs_synth_add_start_field(struct tracefs_synth *synth, + const char *start_field, + const char *name); +int tracefs_synth_add_end_field(struct tracefs_synth *synth, + const char *end_field, + const char *name); +int tracefs_synth_append_start_filter(struct tracefs_synth *synth, + enum tracefs_filter type, + const char *field, + enum tracefs_compare compare, + const char *val); +int tracefs_synth_append_end_filter(struct tracefs_synth *synth, + enum tracefs_filter type, + const char *field, + enum tracefs_compare compare, + const char *val); +int tracefs_synth_trace(struct tracefs_synth *synth, + enum tracefs_synth_handler type, const char *field); +int tracefs_synth_snapshot(struct tracefs_synth *synth, + enum tracefs_synth_handler type, const char *field); +int tracefs_synth_save(struct tracefs_synth *synth, + enum tracefs_synth_handler type, const char *field, + char **save_fields); +bool tracefs_synth_complete(struct tracefs_synth *synth); +struct tracefs_hist *tracefs_synth_get_start_hist(struct tracefs_synth *synth); +int tracefs_synth_create(struct tracefs_synth *synth); +int tracefs_synth_destroy(struct tracefs_synth *synth); +void tracefs_synth_free(struct tracefs_synth *synth); +int tracefs_synth_echo_cmd(struct trace_seq *seq, struct tracefs_synth *synth); +int tracefs_synth_raw_fmt(struct trace_seq *seq, struct tracefs_synth *synth); +const char *tracefs_synth_show_event(struct tracefs_synth *synth); +const char *tracefs_synth_show_start_hist(struct tracefs_synth *synth); +const char *tracefs_synth_show_end_hist(struct tracefs_synth *synth); + +struct tracefs_synth *tracefs_sql(struct tep_handle *tep, const char *name, + const char *sql_buffer, char **err); +struct tep_event * +tracefs_synth_get_event(struct tep_handle *tep, struct tracefs_synth *synth); + +struct tracefs_cpu; + +struct tracefs_cpu *tracefs_cpu_alloc_fd(int fd, int subbuf_size, bool nonblock); +struct tracefs_cpu *tracefs_cpu_open(struct tracefs_instance *instance, + int cpu, bool nonblock); +void tracefs_cpu_close(struct tracefs_cpu *tcpu); +void tracefs_cpu_free_fd(struct tracefs_cpu *tcpu); +int tracefs_cpu_read_size(struct tracefs_cpu *tcpu); +int tracefs_cpu_read(struct tracefs_cpu *tcpu, void *buffer, bool nonblock); +int tracefs_cpu_buffered_read(struct tracefs_cpu *tcpu, void *buffer, bool nonblock); +int tracefs_cpu_write(struct tracefs_cpu *tcpu, int wfd, bool nonblock); +int tracefs_cpu_stop(struct tracefs_cpu *tcpu); +int tracefs_cpu_flush(struct tracefs_cpu *tcpu, void *buffer); +int tracefs_cpu_flush_write(struct tracefs_cpu *tcpu, int wfd); +int tracefs_cpu_pipe(struct tracefs_cpu *tcpu, int wfd, bool nonblock); + +#endif /* _TRACE_FS_H */ |