X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fevent-rule%2Fuser-tracepoint.cpp;fp=src%2Fcommon%2Fevent-rule%2Fuser-tracepoint.cpp;h=5158eeaa072c992a57aa777e4ee8fe0552ea40b5;hp=0000000000000000000000000000000000000000;hb=a6bc4ca9d659caf016ef932fcd944029737ac57c;hpb=97535efaa975ca52bf02c2d5e76351bfd2e3defa diff --git a/src/common/event-rule/user-tracepoint.cpp b/src/common/event-rule/user-tracepoint.cpp new file mode 100644 index 000000000..5158eeaa0 --- /dev/null +++ b/src/common/event-rule/user-tracepoint.cpp @@ -0,0 +1,1081 @@ +/* + * Copyright (C) 2019 Jonathan Rajotte + * + * SPDX-License-Identifier: LGPL-2.1-only + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IS_USER_TRACEPOINT_EVENT_RULE(rule) \ + (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT) + +static void lttng_event_rule_user_tracepoint_destroy(struct lttng_event_rule *rule) +{ + struct lttng_event_rule_user_tracepoint *tracepoint; + + if (rule == NULL) { + return; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + + lttng_log_level_rule_destroy(tracepoint->log_level_rule); + lttng_dynamic_pointer_array_reset(&tracepoint->exclusions); + free(tracepoint->pattern); + free(tracepoint->filter_expression); + free(tracepoint->internal_filter.filter); + free(tracepoint->internal_filter.bytecode); + free(tracepoint); +} + +static bool lttng_event_rule_user_tracepoint_validate( + const struct lttng_event_rule *rule) +{ + bool valid = false; + struct lttng_event_rule_user_tracepoint *tracepoint; + + if (!rule) { + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + + /* Required field. */ + if (!tracepoint->pattern) { + ERR("Invalid user tracepoint event rule: a pattern must be set."); + goto end; + } + + valid = true; +end: + return valid; +} + +static int lttng_event_rule_user_tracepoint_serialize( + const struct lttng_event_rule *rule, + struct lttng_payload *payload) +{ + int ret, i; + size_t pattern_len, filter_expression_len, exclusions_len, header_offset; + size_t size_before_log_level_rule; + struct lttng_event_rule_user_tracepoint *tracepoint; + struct lttng_event_rule_user_tracepoint_comm tracepoint_comm; + enum lttng_event_rule_status status; + unsigned int exclusion_count; + size_t exclusions_appended_len = 0; + struct lttng_event_rule_user_tracepoint_comm *header; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule)) { + ret = -1; + goto end; + } + + header_offset = payload->buffer.size; + + DBG("Serializing user tracepoint event rule."); + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(rule, &exclusion_count); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + + pattern_len = strlen(tracepoint->pattern) + 1; + + if (tracepoint->filter_expression != NULL) { + filter_expression_len = + strlen(tracepoint->filter_expression) + 1; + } else { + filter_expression_len = 0; + } + + exclusions_len = 0; + for (i = 0; i < exclusion_count; i++) { + const char *exclusion; + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( + rule, i, &exclusion); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + + /* Length field. */ + exclusions_len += sizeof(uint32_t); + /* Payload (null terminated). */ + exclusions_len += strlen(exclusion) + 1; + } + + tracepoint_comm.pattern_len = pattern_len; + tracepoint_comm.filter_expression_len = filter_expression_len; + tracepoint_comm.exclusions_count = exclusion_count; + tracepoint_comm.exclusions_len = exclusions_len; + + ret = lttng_dynamic_buffer_append(&payload->buffer, &tracepoint_comm, + sizeof(tracepoint_comm)); + if (ret) { + goto end; + } + + ret = lttng_dynamic_buffer_append( + &payload->buffer, tracepoint->pattern, pattern_len); + if (ret) { + goto end; + } + + ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->filter_expression, + filter_expression_len); + if (ret) { + goto end; + } + + size_before_log_level_rule = payload->buffer.size; + + ret = lttng_log_level_rule_serialize(tracepoint->log_level_rule, payload); + if (ret < 0) { + goto end; + } + + header = (typeof(header)) ((char *) payload->buffer.data + header_offset); + header->log_level_rule_len = + payload->buffer.size - size_before_log_level_rule; + + for (i = 0; i < exclusion_count; i++) { + size_t len; + const char *exclusion; + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( + rule, i, &exclusion); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + + len = strlen(exclusion) + 1; + /* Append exclusion length, includes the null terminator. */ + ret = lttng_dynamic_buffer_append( + &payload->buffer, &len, sizeof(uint32_t)); + if (ret) { + goto end; + } + + exclusions_appended_len += sizeof(uint32_t); + + /* Include the '\0' in the payload. */ + ret = lttng_dynamic_buffer_append( + &payload->buffer, exclusion, len); + if (ret) { + goto end; + } + + exclusions_appended_len += len; + } + + LTTNG_ASSERT(exclusions_len == exclusions_appended_len); + +end: + return ret; +} + +static bool lttng_event_rule_user_tracepoint_is_equal( + const struct lttng_event_rule *_a, + const struct lttng_event_rule *_b) +{ + int i; + bool is_equal = false; + struct lttng_event_rule_user_tracepoint *a, *b; + unsigned int count_a, count_b; + enum lttng_event_rule_status status; + + a = container_of(_a, struct lttng_event_rule_user_tracepoint, parent); + b = container_of(_b, struct lttng_event_rule_user_tracepoint, parent); + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(_a, &count_a); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(_b, &count_b); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + + /* Quick checks. */ + if (count_a != count_b) { + goto end; + } + + if (!!a->filter_expression != !!b->filter_expression) { + goto end; + } + + /* Long check. */ + LTTNG_ASSERT(a->pattern); + LTTNG_ASSERT(b->pattern); + if (strcmp(a->pattern, b->pattern)) { + goto end; + } + + if (a->filter_expression && b->filter_expression) { + if (strcmp(a->filter_expression, b->filter_expression)) { + goto end; + } + } else if (!!a->filter_expression != !!b->filter_expression) { + /* One is set; not the other. */ + goto end; + } + + if (!lttng_log_level_rule_is_equal( + a->log_level_rule, b->log_level_rule)) { + goto end; + } + + for (i = 0; i < count_a; i++) { + const char *exclusion_a, *exclusion_b; + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( + _a, i, &exclusion_a); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( + _b, i, &exclusion_b); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + if (strcmp(exclusion_a, exclusion_b)) { + goto end; + } + } + + is_equal = true; +end: + return is_equal; +} + +static enum lttng_error_code +lttng_event_rule_user_tracepoint_generate_filter_bytecode( + struct lttng_event_rule *rule, + const struct lttng_credentials *creds) +{ + int ret; + enum lttng_error_code ret_code; + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status; + const char *filter; + struct lttng_bytecode *bytecode = NULL; + + LTTNG_ASSERT(rule); + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + + status = lttng_event_rule_user_tracepoint_get_filter(rule, &filter); + if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { + filter = NULL; + } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ret_code = LTTNG_ERR_FILTER_INVAL; + goto end; + } + + if (filter && filter[0] == '\0') { + ret_code = LTTNG_ERR_FILTER_INVAL; + goto error; + } + + if (filter) { + tracepoint->internal_filter.filter = strdup(filter); + if (tracepoint->internal_filter.filter == NULL) { + ret_code = LTTNG_ERR_NOMEM; + goto error; + } + } else { + tracepoint->internal_filter.filter = NULL; + } + + if (tracepoint->internal_filter.filter == NULL) { + ret_code = LTTNG_OK; + goto end; + } + + ret = run_as_generate_filter_bytecode( + tracepoint->internal_filter.filter, creds, + &bytecode); + if (ret) { + ret_code = LTTNG_ERR_FILTER_INVAL; + goto end; + } + + tracepoint->internal_filter.bytecode = bytecode; + bytecode = NULL; + ret_code = LTTNG_OK; + +error: +end: + free(bytecode); + return ret_code; +} + +static const char *lttng_event_rule_user_tracepoint_get_internal_filter( + const struct lttng_event_rule *rule) +{ + struct lttng_event_rule_user_tracepoint *tracepoint; + + LTTNG_ASSERT(rule); + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + return tracepoint->internal_filter.filter; +} + +static const struct lttng_bytecode * +lttng_event_rule_user_tracepoint_get_internal_filter_bytecode( + const struct lttng_event_rule *rule) +{ + struct lttng_event_rule_user_tracepoint *tracepoint; + + LTTNG_ASSERT(rule); + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + return tracepoint->internal_filter.bytecode; +} + +static enum lttng_event_rule_generate_exclusions_status +lttng_event_rule_user_tracepoint_generate_exclusions( + const struct lttng_event_rule *rule, + struct lttng_event_exclusion **_exclusions) +{ + unsigned int nb_exclusions = 0, i; + struct lttng_event_exclusion *exclusions; + enum lttng_event_rule_status event_rule_status; + enum lttng_event_rule_generate_exclusions_status ret_status; + + LTTNG_ASSERT(_exclusions); + + event_rule_status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( + rule, &nb_exclusions); + LTTNG_ASSERT(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); + if (nb_exclusions == 0) { + /* Nothing to do. */ + exclusions = NULL; + ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; + goto end; + } + + exclusions = (lttng_event_exclusion *) zmalloc(sizeof(struct lttng_event_exclusion) + + (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); + if (!exclusions) { + PERROR("Failed to allocate exclusions buffer"); + ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OUT_OF_MEMORY; + goto end; + } + + exclusions->count = nb_exclusions; + for (i = 0; i < nb_exclusions; i++) { + int copy_ret; + const char *exclusion_str; + + event_rule_status = + lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( + rule, i, &exclusion_str); + LTTNG_ASSERT(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); + + copy_ret = lttng_strncpy(exclusions->names[i], exclusion_str, + LTTNG_SYMBOL_NAME_LEN); + if (copy_ret) { + free(exclusions); + exclusions = NULL; + ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_ERROR; + goto end; + } + } + + ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OK; + +end: + *_exclusions = exclusions; + return ret_status; +} + +static void destroy_lttng_exclusions_element(void *ptr) +{ + free(ptr); +} + +static unsigned long lttng_event_rule_user_tracepoint_hash( + const struct lttng_event_rule *rule) +{ + unsigned long hash; + unsigned int i, exclusion_count; + enum lttng_event_rule_status status; + struct lttng_event_rule_user_tracepoint *tp_rule = + container_of(rule, typeof(*tp_rule), parent); + + hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT, + lttng_ht_seed); + hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed); + + if (tp_rule->filter_expression) { + hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed); + } + + if (tp_rule->log_level_rule) { + hash ^= lttng_log_level_rule_hash(tp_rule->log_level_rule); + } + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(rule, + &exclusion_count); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + + for (i = 0; i < exclusion_count; i++) { + const char *exclusion; + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( + rule, i, &exclusion); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + hash ^= hash_key_str(exclusion, lttng_ht_seed); + } + + return hash; +} + +static enum lttng_error_code lttng_event_rule_user_tracepoint_mi_serialize( + const struct lttng_event_rule *rule, struct mi_writer *writer) +{ + int ret; + enum lttng_error_code ret_code; + enum lttng_event_rule_status status; + const char *filter = NULL; + const char *name_pattern = NULL; + const struct lttng_log_level_rule *log_level_rule = NULL; + unsigned int exclusion_count = 0; + + LTTNG_ASSERT(rule); + LTTNG_ASSERT(writer); + LTTNG_ASSERT(IS_USER_TRACEPOINT_EVENT_RULE(rule)); + + status = lttng_event_rule_user_tracepoint_get_name_pattern( + rule, &name_pattern); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + LTTNG_ASSERT(name_pattern); + + status = lttng_event_rule_user_tracepoint_get_filter(rule, &filter); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || + status == LTTNG_EVENT_RULE_STATUS_UNSET); + + status = lttng_event_rule_user_tracepoint_get_log_level_rule( + rule, &log_level_rule); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || + status == LTTNG_EVENT_RULE_STATUS_UNSET); + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( + rule, &exclusion_count); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + + /* Open event rule user tracepoint element. */ + ret = mi_lttng_writer_open_element( + writer, mi_lttng_element_event_rule_user_tracepoint); + if (ret) { + goto mi_error; + } + + /* Name pattern. */ + ret = mi_lttng_writer_write_element_string(writer, + mi_lttng_element_event_rule_name_pattern, name_pattern); + if (ret) { + goto mi_error; + } + + /* Filter expression. */ + if (filter != NULL) { + ret = mi_lttng_writer_write_element_string(writer, + mi_lttng_element_event_rule_filter_expression, + filter); + if (ret) { + goto mi_error; + } + } + + /* Log level rule. */ + if (log_level_rule) { + ret_code = lttng_log_level_rule_mi_serialize( + log_level_rule, writer); + if (ret_code != LTTNG_OK) { + goto end; + } + } + + if (exclusion_count != 0) { + int i; + + /* Open the exclusion list. */ + ret = mi_lttng_writer_open_element(writer, + mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusions); + if (ret) { + goto mi_error; + } + + for (i = 0; i < exclusion_count; i++) { + const char *exclusion; + + status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( + rule, i, &exclusion); + LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); + + ret = mi_lttng_writer_write_element_string(writer, + mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusion, + exclusion); + if (ret) { + goto mi_error; + } + } + + /* Close the list. */ + ret = mi_lttng_writer_close_element(writer); + if (ret) { + goto mi_error; + } + } + + /* Close event rule user tracepoint element. */ + ret = mi_lttng_writer_close_element(writer); + if (ret) { + goto mi_error; + } + + ret_code = LTTNG_OK; + goto end; + +mi_error: + ret_code = LTTNG_ERR_MI_IO_FAIL; +end: + return ret_code; +} + +struct lttng_event_rule *lttng_event_rule_user_tracepoint_create(void) +{ + struct lttng_event_rule *rule = NULL; + struct lttng_event_rule_user_tracepoint *tp_rule; + enum lttng_event_rule_status status; + + tp_rule = (lttng_event_rule_user_tracepoint *) zmalloc(sizeof(struct lttng_event_rule_user_tracepoint)); + if (!tp_rule) { + goto end; + } + + rule = &tp_rule->parent; + lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT); + tp_rule->parent.validate = lttng_event_rule_user_tracepoint_validate; + tp_rule->parent.serialize = lttng_event_rule_user_tracepoint_serialize; + tp_rule->parent.equal = lttng_event_rule_user_tracepoint_is_equal; + tp_rule->parent.destroy = lttng_event_rule_user_tracepoint_destroy; + tp_rule->parent.generate_filter_bytecode = + lttng_event_rule_user_tracepoint_generate_filter_bytecode; + tp_rule->parent.get_filter = + lttng_event_rule_user_tracepoint_get_internal_filter; + tp_rule->parent.get_filter_bytecode = + lttng_event_rule_user_tracepoint_get_internal_filter_bytecode; + tp_rule->parent.generate_exclusions = + lttng_event_rule_user_tracepoint_generate_exclusions; + tp_rule->parent.hash = lttng_event_rule_user_tracepoint_hash; + tp_rule->parent.mi_serialize = lttng_event_rule_user_tracepoint_mi_serialize; + + /* Not necessary for now. */ + tp_rule->parent.generate_lttng_event = NULL; + + tp_rule->log_level_rule = NULL; + + lttng_dynamic_pointer_array_init(&tp_rule->exclusions, + destroy_lttng_exclusions_element); + + /* Default pattern is '*'. */ + status = lttng_event_rule_user_tracepoint_set_name_pattern(rule, "*"); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + lttng_event_rule_destroy(rule); + rule = NULL; + } + +end: + return rule; +} + +ssize_t lttng_event_rule_user_tracepoint_create_from_payload( + struct lttng_payload_view *view, + struct lttng_event_rule **_event_rule) +{ + ssize_t ret, offset = 0; + int i; + enum lttng_event_rule_status status; + const struct lttng_event_rule_user_tracepoint_comm *tracepoint_comm; + const char *pattern; + const char *filter_expression = NULL; + const char **exclusions = NULL; + const uint32_t *exclusion_len; + const char *exclusion; + struct lttng_buffer_view current_buffer_view; + struct lttng_event_rule *rule = NULL; + struct lttng_log_level_rule *log_level_rule = NULL; + + if (!_event_rule) { + ret = -1; + goto end; + } + + current_buffer_view = lttng_buffer_view_from_view( + &view->buffer, offset, sizeof(*tracepoint_comm)); + if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { + ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); + ret = -1; + goto end; + } + + tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; + + rule = lttng_event_rule_user_tracepoint_create(); + if (!rule) { + ERR("Failed to create event rule user tracepoint."); + ret = -1; + goto end; + } + + /* Skip to payload. */ + offset += current_buffer_view.size; + + /* Map the pattern. */ + current_buffer_view = lttng_buffer_view_from_view( + &view->buffer, offset, tracepoint_comm->pattern_len); + + if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { + ret = -1; + goto end; + } + + pattern = current_buffer_view.data; + if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, + tracepoint_comm->pattern_len)) { + ret = -1; + goto end; + } + + /* Skip after the pattern. */ + offset += tracepoint_comm->pattern_len; + + if (!tracepoint_comm->filter_expression_len) { + goto skip_filter_expression; + } + + /* Map the filter_expression. */ + current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, + tracepoint_comm->filter_expression_len); + if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { + ret = -1; + goto end; + } + + filter_expression = current_buffer_view.data; + if (!lttng_buffer_view_contains_string(¤t_buffer_view, + filter_expression, + tracepoint_comm->filter_expression_len)) { + ret = -1; + goto end; + } + + /* Skip after the pattern. */ + offset += tracepoint_comm->filter_expression_len; + +skip_filter_expression: + if (!tracepoint_comm->log_level_rule_len) { + goto skip_log_level_rule; + } + + { + /* Map the log level rule. */ + struct lttng_payload_view current_payload_view = + lttng_payload_view_from_view(view, offset, + tracepoint_comm->log_level_rule_len); + + ret = lttng_log_level_rule_create_from_payload( + ¤t_payload_view, &log_level_rule); + if (ret < 0) { + ret = -1; + goto end; + } + + LTTNG_ASSERT(ret == tracepoint_comm->log_level_rule_len); + } + + /* Skip after the log level rule. */ + offset += tracepoint_comm->log_level_rule_len; + +skip_log_level_rule: + for (i = 0; i < tracepoint_comm->exclusions_count; i++) { + current_buffer_view = lttng_buffer_view_from_view( + &view->buffer, offset, sizeof(*exclusion_len)); + if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { + ret = -1; + goto end; + } + + exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; + offset += sizeof(*exclusion_len); + + current_buffer_view = lttng_buffer_view_from_view( + &view->buffer, offset, *exclusion_len); + if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { + ret = -1; + goto end; + } + + exclusion = current_buffer_view.data; + if (!lttng_buffer_view_contains_string(¤t_buffer_view, + exclusion, *exclusion_len)) { + ret = -1; + goto end; + } + + status = lttng_event_rule_user_tracepoint_add_name_pattern_exclusion(rule, exclusion); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ERR("Failed to add event rule user tracepoint exclusion \"%s\".", + exclusion); + ret = -1; + goto end; + } + + /* Skip to next exclusion. */ + offset += *exclusion_len; + } + + status = lttng_event_rule_user_tracepoint_set_name_pattern(rule, pattern); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ERR("Failed to set event rule user tracepoint pattern."); + ret = -1; + goto end; + } + + if (filter_expression) { + status = lttng_event_rule_user_tracepoint_set_filter( + rule, filter_expression); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ERR("Failed to set event rule user tracepoint pattern."); + ret = -1; + goto end; + } + } + + if (log_level_rule) { + status = lttng_event_rule_user_tracepoint_set_log_level_rule( + rule, log_level_rule); + if (status != LTTNG_EVENT_RULE_STATUS_OK) { + ERR("Failed to set event rule user tracepoint log level rule."); + ret = -1; + goto end; + } + } + + *_event_rule = rule; + rule = NULL; + ret = offset; +end: + free(exclusions); + lttng_log_level_rule_destroy(log_level_rule); + lttng_event_rule_destroy(rule); + return ret; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_set_name_pattern( + struct lttng_event_rule *rule, const char *pattern) +{ + char *pattern_copy = NULL; + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !pattern || + strlen(pattern) == 0) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + pattern_copy = strdup(pattern); + if (!pattern_copy) { + status = LTTNG_EVENT_RULE_STATUS_ERROR; + goto end; + } + + /* Normalize the pattern. */ + strutils_normalize_star_glob_pattern(pattern_copy); + + free(tracepoint->pattern); + + tracepoint->pattern = pattern_copy; + pattern_copy = NULL; +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern( + const struct lttng_event_rule *rule, const char **pattern) +{ + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !pattern) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + if (!tracepoint->pattern) { + status = LTTNG_EVENT_RULE_STATUS_UNSET; + goto end; + } + + *pattern = tracepoint->pattern; +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_set_filter( + struct lttng_event_rule *rule, const char *expression) +{ + char *expression_copy = NULL; + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !expression || + strlen(expression) == 0) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + expression_copy = strdup(expression); + if (!expression_copy) { + PERROR("Failed to copy filter expression"); + status = LTTNG_EVENT_RULE_STATUS_ERROR; + goto end; + } + + if (tracepoint->filter_expression) { + free(tracepoint->filter_expression); + } + + tracepoint->filter_expression = expression_copy; + expression_copy = NULL; +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_filter( + const struct lttng_event_rule *rule, const char **expression) +{ + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !expression) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + if (!tracepoint->filter_expression) { + status = LTTNG_EVENT_RULE_STATUS_UNSET; + goto end; + } + + *expression = tracepoint->filter_expression; +end: + return status; +} + +static bool log_level_rule_valid(const struct lttng_log_level_rule *rule) +{ + bool valid = false; + enum lttng_log_level_rule_status status; + int level; + + switch (lttng_log_level_rule_get_type(rule)) { + case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: + status = lttng_log_level_rule_exactly_get_level(rule, &level); + break; + case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: + status = lttng_log_level_rule_at_least_as_severe_as_get_level( + rule, &level); + break; + default: + abort(); + } + + LTTNG_ASSERT(status == LTTNG_LOG_LEVEL_RULE_STATUS_OK); + + if (level < LTTNG_LOGLEVEL_EMERG) { + /* Invalid. */ + goto end; + } + if (level > LTTNG_LOGLEVEL_DEBUG) { + /* Invalid. */ + goto end; + } + + valid = true; + +end: + return valid; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_set_log_level_rule( + struct lttng_event_rule *rule, + const struct lttng_log_level_rule *log_level_rule) +{ + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + struct lttng_log_level_rule *copy = NULL; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule)) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + + if (!log_level_rule_valid(log_level_rule)) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + copy = lttng_log_level_rule_copy(log_level_rule); + if (copy == NULL) { + status = LTTNG_EVENT_RULE_STATUS_ERROR; + goto end; + } + + if (tracepoint->log_level_rule) { + lttng_log_level_rule_destroy(tracepoint->log_level_rule); + } + + tracepoint->log_level_rule = copy; + +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_log_level_rule( + const struct lttng_event_rule *rule, + const struct lttng_log_level_rule **log_level_rule + ) +{ + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !log_level_rule) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + if (tracepoint->log_level_rule == NULL) { + status = LTTNG_EVENT_RULE_STATUS_UNSET; + goto end; + } + + *log_level_rule = tracepoint->log_level_rule; +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_add_name_pattern_exclusion( + struct lttng_event_rule *rule, + const char *exclusion) +{ + int ret; + char *exclusion_copy = NULL; + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || + !exclusion) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + + if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + exclusion_copy = strdup(exclusion); + if (!exclusion_copy) { + status = LTTNG_EVENT_RULE_STATUS_ERROR; + goto end; + } + + ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, + exclusion_copy); + if (ret < 0) { + status = LTTNG_EVENT_RULE_STATUS_ERROR; + goto end; + } + + exclusion_copy = NULL; +end: + free(exclusion_copy); + return status; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( + const struct lttng_event_rule *rule, unsigned int *count) +{ + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !count) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); +end: + return status; +} + +enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( + const struct lttng_event_rule *rule, + unsigned int index, + const char **exclusion) +{ + unsigned int count; + struct lttng_event_rule_user_tracepoint *tracepoint; + enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; + + if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { + status = LTTNG_EVENT_RULE_STATUS_INVALID; + goto end; + } + + tracepoint = container_of( + rule, struct lttng_event_rule_user_tracepoint, parent); + if (lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(rule, &count) != + LTTNG_EVENT_RULE_STATUS_OK) { + goto end; + } + + if (index >= count) { + goto end; + } + + *exclusion = (const char *) lttng_dynamic_pointer_array_get_pointer( + &tracepoint->exclusions, index); +end: + return status; +}