diff options
Diffstat (limited to 'kernel/trace/trace_events_hist.c')
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 120 |
1 files changed, 81 insertions, 39 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 9555b8e1d1e3..44db5ba9cabb 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -217,6 +217,20 @@ static u64 hist_field_dynstring(struct hist_field *hist_field, return (u64)(unsigned long)addr; } +static u64 hist_field_reldynstring(struct hist_field *hist_field, + struct tracing_map_elt *elt, + struct trace_buffer *buffer, + struct ring_buffer_event *rbe, + void *event) +{ + u32 *item = event + hist_field->field->offset; + u32 str_item = *item; + int str_loc = str_item & 0xffff; + char *addr = (char *)&item[1] + str_loc; + + return (u64)(unsigned long)addr; +} + static u64 hist_field_pstring(struct hist_field *hist_field, struct tracing_map_elt *elt, struct trace_buffer *buffer, @@ -713,11 +727,16 @@ static struct track_data *track_data_alloc(unsigned int key_len, return data; } -static char last_cmd[MAX_FILTER_STR_VAL]; +#define HIST_PREFIX "hist:" + +static char *last_cmd; static char last_cmd_loc[MAX_FILTER_STR_VAL]; static int errpos(char *str) { + if (!str || !last_cmd) + return 0; + return err_pos(last_cmd, str); } @@ -725,12 +744,22 @@ static void last_cmd_set(struct trace_event_file *file, char *str) { const char *system = NULL, *name = NULL; struct trace_event_call *call; + int len; if (!str) return; - strcpy(last_cmd, "hist:"); - strncat(last_cmd, str, MAX_FILTER_STR_VAL - 1 - sizeof("hist:")); + /* sizeof() contains the nul byte */ + len = sizeof(HIST_PREFIX) + strlen(str); + kfree(last_cmd); + last_cmd = kzalloc(len, GFP_KERNEL); + if (!last_cmd) + return; + + strcpy(last_cmd, HIST_PREFIX); + /* Again, sizeof() contains the nul byte */ + len -= sizeof(HIST_PREFIX); + strncat(last_cmd, str, len); if (file) { call = file->event_call; @@ -743,18 +772,22 @@ static void last_cmd_set(struct trace_event_file *file, char *str) } if (system) - snprintf(last_cmd_loc, MAX_FILTER_STR_VAL, "hist:%s:%s", system, name); + snprintf(last_cmd_loc, MAX_FILTER_STR_VAL, HIST_PREFIX "%s:%s", system, name); } -static void hist_err(struct trace_array *tr, u8 err_type, u8 err_pos) +static void hist_err(struct trace_array *tr, u8 err_type, u16 err_pos) { + if (!last_cmd) + return; + tracing_log_err(tr, last_cmd_loc, last_cmd, err_text, err_type, err_pos); } static void hist_err_clear(void) { - last_cmd[0] = '\0'; + if (last_cmd) + last_cmd[0] = '\0'; last_cmd_loc[0] = '\0'; } @@ -1956,8 +1989,10 @@ static struct hist_field *create_hist_field(struct hist_trigger_data *hist_data, if (field->filter_type == FILTER_STATIC_STRING) { hist_field->fn = hist_field_string; hist_field->size = field->size; - } else if (field->filter_type == FILTER_DYN_STRING) + } else if (field->filter_type == FILTER_DYN_STRING) { hist_field->fn = hist_field_dynstring; + } else if (field->filter_type == FILTER_RDYN_STRING) + hist_field->fn = hist_field_reldynstring; else hist_field->fn = hist_field_pstring; } else { @@ -2273,9 +2308,9 @@ parse_field(struct hist_trigger_data *hist_data, struct trace_event_file *file, /* * For backward compatibility, if field_name * was "cpu", then we treat this the same as - * common_cpu. + * common_cpu. This also works for "CPU". */ - if (strcmp(field_name, "cpu") == 0) { + if (field && field->filter_type == FILTER_CPU) { *flags |= HIST_FIELD_FL_CPU; } else { hist_err(tr, HIST_ERR_FIELD_NOT_FOUND, @@ -2487,6 +2522,8 @@ static struct hist_field *parse_unary(struct hist_trigger_data *hist_data, (HIST_FIELD_FL_TIMESTAMP | HIST_FIELD_FL_TIMESTAMP_USECS); expr->fn = hist_field_unary_minus; expr->operands[0] = operand1; + expr->size = operand1->size; + expr->is_signed = operand1->is_signed; expr->operator = FIELD_OP_UNARY_MINUS; expr->name = expr_str(expr, 0); expr->type = kstrdup_const(operand1->type, GFP_KERNEL); @@ -2703,6 +2740,7 @@ static struct hist_field *parse_expr(struct hist_trigger_data *hist_data, /* The operand sizes should be the same, so just pick one */ expr->size = operand1->size; + expr->is_signed = operand1->is_signed; expr->operator = field_op; expr->type = kstrdup_const(operand1->type, GFP_KERNEL); @@ -2745,9 +2783,9 @@ static char *find_trigger_filter(struct hist_trigger_data *hist_data, } static struct event_command trigger_hist_cmd; -static int event_hist_trigger_func(struct event_command *cmd_ops, - struct trace_event_file *file, - char *glob, char *cmd, char *param); +static int event_hist_trigger_parse(struct event_command *cmd_ops, + struct trace_event_file *file, + char *glob, char *cmd, char *param); static bool compatible_keys(struct hist_trigger_data *target_hist_data, struct hist_trigger_data *hist_data, @@ -2950,8 +2988,8 @@ create_field_var_hist(struct hist_trigger_data *target_hist_data, var_hist->hist_data = hist_data; /* Create the new histogram with our variable */ - ret = event_hist_trigger_func(&trigger_hist_cmd, file, - "", "hist", cmd); + ret = event_hist_trigger_parse(&trigger_hist_cmd, file, + "", "hist", cmd); if (ret) { kfree(cmd); kfree(var_hist->cmd); @@ -3757,7 +3795,7 @@ static int check_synth_field(struct synth_event *event, if (strcmp(field->type, hist_field->type) != 0) { if (field->size != hist_field->size || - field->is_signed != hist_field->is_signed) + (!field->is_string && field->is_signed != hist_field->is_signed)) return -EINVAL; } @@ -3919,6 +3957,7 @@ static int trace_action_create(struct hist_trigger_data *hist_data, var_ref_idx = find_var_ref_idx(hist_data, var_ref); if (WARN_ON(var_ref_idx < 0)) { + kfree(p); ret = var_ref_idx; goto err; } @@ -4812,7 +4851,7 @@ static int create_tracing_map_fields(struct hist_trigger_data *hist_data) if (hist_field->flags & HIST_FIELD_FL_STACKTRACE) cmp_fn = tracing_map_cmp_none; - else if (!field) + else if (!field || hist_field->flags & HIST_FIELD_FL_CPU) cmp_fn = tracing_map_cmp_num(hist_field->size, hist_field->is_signed); else if (is_string_field(field)) @@ -4961,7 +5000,8 @@ static inline void add_to_key(char *compound_key, void *key, struct ftrace_event_field *field; field = key_field->field; - if (field->filter_type == FILTER_DYN_STRING) + if (field->filter_type == FILTER_DYN_STRING || + field->filter_type == FILTER_RDYN_STRING) size = *(u32 *)(rec + field->offset) >> 16; else if (field->filter_type == FILTER_STATIC_STRING) size = field->size; @@ -5589,7 +5629,7 @@ static int event_hist_trigger_print(struct seq_file *m, bool have_var = false; unsigned int i; - seq_puts(m, "hist:"); + seq_puts(m, HIST_PREFIX); if (data->name) seq_printf(m, "%s:", data->name); @@ -5712,8 +5752,8 @@ static void unregister_field_var_hists(struct hist_trigger_data *hist_data) for (i = 0; i < hist_data->n_field_var_hists; i++) { file = hist_data->field_var_hists[i]->hist_data->event_file; cmd = hist_data->field_var_hists[i]->cmd; - ret = event_hist_trigger_func(&trigger_hist_cmd, file, - "!hist", "hist", cmd); + ret = event_hist_trigger_parse(&trigger_hist_cmd, file, + "!hist", "hist", cmd); WARN_ON_ONCE(ret < 0); } } @@ -5742,7 +5782,7 @@ static void event_hist_trigger_free(struct event_trigger_ops *ops, } static struct event_trigger_ops event_hist_trigger_ops = { - .func = event_hist_trigger, + .trigger = event_hist_trigger, .print = event_hist_trigger_print, .init = event_hist_trigger_init, .free = event_hist_trigger_free, @@ -5776,7 +5816,7 @@ static void event_hist_trigger_named_free(struct event_trigger_ops *ops, } static struct event_trigger_ops event_hist_trigger_named_ops = { - .func = event_hist_trigger, + .trigger = event_hist_trigger, .print = event_hist_trigger_print, .init = event_hist_trigger_named_init, .free = event_hist_trigger_named_free, @@ -5893,7 +5933,7 @@ static bool hist_trigger_match(struct event_trigger_data *data, return true; } -static int hist_register_trigger(char *glob, struct event_trigger_ops *ops, +static int hist_register_trigger(char *glob, struct event_trigger_data *data, struct trace_event_file *file) { @@ -6045,7 +6085,7 @@ static bool hist_trigger_check_refs(struct event_trigger_data *data, return false; } -static void hist_unregister_trigger(char *glob, struct event_trigger_ops *ops, +static void hist_unregister_trigger(char *glob, struct event_trigger_data *data, struct trace_event_file *file) { @@ -6129,9 +6169,9 @@ static void hist_unreg_all(struct trace_event_file *file) } } -static int event_hist_trigger_func(struct event_command *cmd_ops, - struct trace_event_file *file, - char *glob, char *cmd, char *param) +static int event_hist_trigger_parse(struct event_command *cmd_ops, + struct trace_event_file *file, + char *glob, char *cmd, char *param) { unsigned int hist_trigger_bits = TRACING_MAP_BITS_DEFAULT; struct event_trigger_data *trigger_data; @@ -6146,7 +6186,9 @@ static int event_hist_trigger_func(struct event_command *cmd_ops, lockdep_assert_held(&event_mutex); - if (glob && strlen(glob)) { + WARN_ON(!glob); + + if (strlen(glob)) { hist_err_clear(); last_cmd_set(file, param); } @@ -6179,7 +6221,7 @@ static int event_hist_trigger_func(struct event_command *cmd_ops, continue; } break; - } while (p); + } while (1); if (!p) param = NULL; @@ -6245,7 +6287,7 @@ static int event_hist_trigger_func(struct event_command *cmd_ops, goto out_free; } - cmd_ops->unreg(glob+1, trigger_ops, trigger_data, file); + cmd_ops->unreg(glob+1, trigger_data, file); se_name = trace_event_name(file->event_call); se = find_synth_event(se_name); if (se) @@ -6254,7 +6296,7 @@ static int event_hist_trigger_func(struct event_command *cmd_ops, goto out_free; } - ret = cmd_ops->reg(glob, trigger_ops, trigger_data, file); + ret = cmd_ops->reg(glob, trigger_data, file); /* * The above returns on success the # of triggers registered, * but if it didn't register any it returns zero. Consider no @@ -6297,7 +6339,7 @@ enable: return ret; out_unreg: - cmd_ops->unreg(glob+1, trigger_ops, trigger_data, file); + cmd_ops->unreg(glob+1, trigger_data, file); out_free: if (cmd_ops->set_filter) cmd_ops->set_filter(NULL, trigger_data, NULL); @@ -6314,7 +6356,7 @@ static struct event_command trigger_hist_cmd = { .name = "hist", .trigger_type = ETT_EVENT_HIST, .flags = EVENT_CMD_FL_NEEDS_REC, - .func = event_hist_trigger_func, + .parse = event_hist_trigger_parse, .reg = hist_register_trigger, .unreg = hist_unregister_trigger, .unreg_all = hist_unreg_all, @@ -6366,28 +6408,28 @@ hist_enable_count_trigger(struct event_trigger_data *data, } static struct event_trigger_ops hist_enable_trigger_ops = { - .func = hist_enable_trigger, + .trigger = hist_enable_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops hist_enable_count_trigger_ops = { - .func = hist_enable_count_trigger, + .trigger = hist_enable_count_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops hist_disable_trigger_ops = { - .func = hist_enable_trigger, + .trigger = hist_enable_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, }; static struct event_trigger_ops hist_disable_count_trigger_ops = { - .func = hist_enable_count_trigger, + .trigger = hist_enable_count_trigger, .print = event_enable_trigger_print, .init = event_trigger_init, .free = event_enable_trigger_free, @@ -6429,7 +6471,7 @@ static void hist_enable_unreg_all(struct trace_event_file *file) static struct event_command trigger_hist_enable_cmd = { .name = ENABLE_HIST_STR, .trigger_type = ETT_HIST_ENABLE, - .func = event_enable_trigger_func, + .parse = event_enable_trigger_parse, .reg = event_enable_register_trigger, .unreg = event_enable_unregister_trigger, .unreg_all = hist_enable_unreg_all, @@ -6440,7 +6482,7 @@ static struct event_command trigger_hist_enable_cmd = { static struct event_command trigger_hist_disable_cmd = { .name = DISABLE_HIST_STR, .trigger_type = ETT_HIST_ENABLE, - .func = event_enable_trigger_func, + .parse = event_enable_trigger_parse, .reg = event_enable_register_trigger, .unreg = event_enable_unregister_trigger, .unreg_all = hist_enable_unreg_all, |