--- /dev/null
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <assert.h>
+#include <common/credentials.h>
+#include <common/error.h>
+#include <common/macros.h>
+#include <common/optional.h>
+#include <common/payload.h>
+#include <common/payload-view.h>
+#include <common/runas.h>
+#include <common/hashtable/hashtable.h>
+#include <common/hashtable/utils.h>
+#include <common/string-utils/string-utils.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/log4j-logging-internal.h>
+#include <lttng/log-level-rule.h>
+#include <lttng/event.h>
+
+#define IS_LOG4J_LOGGING_EVENT_RULE(rule) \
+ (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING)
+
+static void lttng_event_rule_log4j_logging_destroy(struct lttng_event_rule *rule)
+{
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+
+ if (rule == NULL) {
+ return;
+ }
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+
+ lttng_log_level_rule_destroy(log4j_logging->log_level_rule);
+ free(log4j_logging->pattern);
+ free(log4j_logging->filter_expression);
+ free(log4j_logging->internal_filter.filter);
+ free(log4j_logging->internal_filter.bytecode);
+ free(log4j_logging);
+}
+
+static bool lttng_event_rule_log4j_logging_validate(
+ const struct lttng_event_rule *rule)
+{
+ bool valid = false;
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+
+ if (!rule) {
+ goto end;
+ }
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+
+ /* Required field. */
+ if (!log4j_logging->pattern) {
+ ERR("Invalid log4j_logging event rule: a pattern must be set.");
+ goto end;
+ }
+
+ valid = true;
+end:
+ return valid;
+}
+
+static int lttng_event_rule_log4j_logging_serialize(
+ const struct lttng_event_rule *rule,
+ struct lttng_payload *payload)
+{
+ int ret;
+ size_t pattern_len, filter_expression_len, header_offset;
+ size_t size_before_log_level_rule;
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+ struct lttng_event_rule_log4j_logging_comm log4j_logging_comm;
+ struct lttng_event_rule_log4j_logging_comm *header;
+
+ if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule)) {
+ ret = -1;
+ goto end;
+ }
+
+ header_offset = payload->buffer.size;
+
+ DBG("Serializing log4j_logging event rule.");
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+
+ pattern_len = strlen(log4j_logging->pattern) + 1;
+
+ if (log4j_logging->filter_expression != NULL) {
+ filter_expression_len =
+ strlen(log4j_logging->filter_expression) + 1;
+ } else {
+ filter_expression_len = 0;
+ }
+
+ log4j_logging_comm.pattern_len = pattern_len;
+ log4j_logging_comm.filter_expression_len = filter_expression_len;
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, &log4j_logging_comm,
+ sizeof(log4j_logging_comm));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, log4j_logging->pattern, pattern_len);
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(&payload->buffer, log4j_logging->filter_expression,
+ filter_expression_len);
+ if (ret) {
+ goto end;
+ }
+
+ size_before_log_level_rule = payload->buffer.size;
+
+ ret = lttng_log_level_rule_serialize(log4j_logging->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;
+
+end:
+ return ret;
+}
+
+static bool lttng_event_rule_log4j_logging_is_equal(
+ const struct lttng_event_rule *_a,
+ const struct lttng_event_rule *_b)
+{
+ bool is_equal = false;
+ struct lttng_event_rule_log4j_logging *a, *b;
+
+ a = container_of(_a, struct lttng_event_rule_log4j_logging, parent);
+ b = container_of(_b, struct lttng_event_rule_log4j_logging, parent);
+
+ /* Quick checks. */
+
+ if (!!a->filter_expression != !!b->filter_expression) {
+ goto end;
+ }
+
+ /* Long check. */
+ assert(a->pattern);
+ 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;
+ }
+
+ is_equal = true;
+end:
+ return is_equal;
+}
+
+/*
+ * On success ret is 0;
+ *
+ * On error ret is negative.
+ *
+ * An event with NO loglevel and the name is * will return NULL.
+ */
+static int generate_agent_filter(
+ const struct lttng_event_rule *rule, char **_agent_filter)
+{
+ int err;
+ int ret = 0;
+ char *agent_filter = NULL;
+ const char *pattern;
+ const char *filter;
+ const struct lttng_log_level_rule *log_level_rule = NULL;
+ enum lttng_event_rule_status status;
+
+ assert(rule);
+ assert(_agent_filter);
+
+ status = lttng_event_rule_log4j_logging_get_name_pattern(rule, &pattern);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_event_rule_log4j_logging_get_filter(rule, &filter);
+ if (status == LTTNG_EVENT_RULE_STATUS_UNSET) {
+ filter = NULL;
+ } else if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+
+ /* Don't add filter for the '*' event. */
+ if (strcmp(pattern, "*") != 0) {
+ if (filter) {
+ err = asprintf(&agent_filter,
+ "(%s) && (logger_name == \"%s\")",
+ filter, pattern);
+ } else {
+ err = asprintf(&agent_filter, "logger_name == \"%s\"",
+ pattern);
+ }
+
+ if (err < 0) {
+ PERROR("Failed to format agent filter string");
+ ret = -1;
+ goto end;
+ }
+ }
+
+ status = lttng_event_rule_log4j_logging_get_log_level_rule(
+ rule, &log_level_rule);
+ if (status == LTTNG_EVENT_RULE_STATUS_OK) {
+ enum lttng_log_level_rule_status llr_status;
+ const char *op;
+ int level;
+
+ switch (lttng_log_level_rule_get_type(log_level_rule))
+ {
+ case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY:
+ llr_status = lttng_log_level_rule_exactly_get_level(
+ log_level_rule, &level);
+ op = "==";
+ break;
+ case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS:
+ llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level(
+ log_level_rule, &level);
+ op = ">=";
+ break;
+ default:
+ abort();
+ }
+
+ if (llr_status != LTTNG_LOG_LEVEL_RULE_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ if (filter || agent_filter) {
+ char *new_filter;
+
+ err = asprintf(&new_filter,
+ "(%s) && (int_loglevel %s %d)",
+ agent_filter ? agent_filter : filter,
+ op, level);
+ if (agent_filter) {
+ free(agent_filter);
+ }
+ agent_filter = new_filter;
+ } else {
+ err = asprintf(&agent_filter, "int_loglevel %s %d", op,
+ level);
+ }
+
+ if (err < 0) {
+ PERROR("Failed to format agent filter string");
+ ret = -1;
+ goto end;
+ }
+ }
+
+ *_agent_filter = agent_filter;
+ agent_filter = NULL;
+
+end:
+ free(agent_filter);
+ return ret;
+}
+
+static enum lttng_error_code
+lttng_event_rule_log4j_logging_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_log4j_logging *log4j_logging;
+ enum lttng_event_rule_status status;
+ const char *filter;
+ struct lttng_bytecode *bytecode = NULL;
+ char *agent_filter;
+
+ assert(rule);
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+
+ status = lttng_event_rule_log4j_logging_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;
+ }
+
+ ret = generate_agent_filter(rule, &agent_filter);
+ if (ret) {
+ ret_code = LTTNG_ERR_FILTER_INVAL;
+ goto error;
+ }
+
+ log4j_logging->internal_filter.filter = agent_filter;
+
+ if (log4j_logging->internal_filter.filter == NULL) {
+ ret_code = LTTNG_OK;
+ goto end;
+ }
+
+ ret = run_as_generate_filter_bytecode(
+ log4j_logging->internal_filter.filter, creds,
+ &bytecode);
+ if (ret) {
+ ret_code = LTTNG_ERR_FILTER_INVAL;
+ goto end;
+ }
+
+ log4j_logging->internal_filter.bytecode = bytecode;
+ bytecode = NULL;
+ ret_code = LTTNG_OK;
+
+error:
+end:
+ free(bytecode);
+ return ret_code;
+}
+
+static const char *lttng_event_rule_log4j_logging_get_internal_filter(
+ const struct lttng_event_rule *rule)
+{
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+
+ assert(rule);
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+ return log4j_logging->internal_filter.filter;
+}
+
+static const struct lttng_bytecode *
+lttng_event_rule_log4j_logging_get_internal_filter_bytecode(
+ const struct lttng_event_rule *rule)
+{
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+
+ assert(rule);
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+ return log4j_logging->internal_filter.bytecode;
+}
+
+static enum lttng_event_rule_generate_exclusions_status
+lttng_event_rule_log4j_logging_generate_exclusions(
+ const struct lttng_event_rule *rule,
+ struct lttng_event_exclusion **_exclusions)
+{
+ /* Unsupported. */
+ *_exclusions = NULL;
+ return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE;
+}
+
+static unsigned long lttng_event_rule_log4j_logging_hash(
+ const struct lttng_event_rule *rule)
+{
+ unsigned long hash;
+ struct lttng_event_rule_log4j_logging *tp_rule =
+ container_of(rule, typeof(*tp_rule), parent);
+
+ hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING,
+ 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);
+ }
+
+ return hash;
+}
+
+static struct lttng_event *lttng_event_rule_log4j_logging_generate_lttng_event(
+ const struct lttng_event_rule *rule)
+{
+ int ret;
+ const struct lttng_event_rule_log4j_logging *log4j_logging;
+ struct lttng_event *local_event = NULL;
+ struct lttng_event *event = NULL;
+ enum lttng_loglevel_type loglevel_type;
+ int loglevel_value = 0;
+ enum lttng_event_rule_status status;
+ const struct lttng_log_level_rule *log_level_rule;
+
+ log4j_logging = container_of(
+ rule, const struct lttng_event_rule_log4j_logging, parent);
+
+ local_event = zmalloc(sizeof(*local_event));
+ if (!local_event) {
+ goto error;
+ }
+
+ local_event->type = LTTNG_EVENT_TRACEPOINT;
+ ret = lttng_strncpy(local_event->name, log4j_logging->pattern,
+ sizeof(local_event->name));
+ if (ret) {
+ ERR("Truncation occurred when copying event rule pattern to `lttng_event` structure: pattern = '%s'",
+ log4j_logging->pattern);
+ goto error;
+ }
+
+
+ /* Map the log level rule to an equivalent lttng_loglevel. */
+ status = lttng_event_rule_log4j_logging_get_log_level_rule(
+ rule, &log_level_rule);
+ if (status == LTTNG_EVENT_RULE_STATUS_UNSET) {
+ loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
+ loglevel_value = 0;
+ } else if (status == LTTNG_EVENT_RULE_STATUS_OK) {
+ enum lttng_log_level_rule_status llr_status;
+
+ switch (lttng_log_level_rule_get_type(log_level_rule)) {
+ case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY:
+ llr_status = lttng_log_level_rule_exactly_get_level(
+ log_level_rule, &loglevel_value);
+ loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
+ break;
+ case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS:
+ llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level(
+ log_level_rule, &loglevel_value);
+ loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
+ break;
+ default:
+ abort();
+ break;
+ }
+
+ if (llr_status != LTTNG_LOG_LEVEL_RULE_STATUS_OK) {
+ goto error;
+ }
+ } else {
+ goto error;
+ }
+
+ local_event->loglevel_type = loglevel_type;
+ local_event->loglevel = loglevel_value;
+
+ event = local_event;
+ local_event = NULL;
+error:
+ free(local_event);
+ return event;
+}
+
+struct lttng_event_rule *lttng_event_rule_log4j_logging_create(void)
+{
+ struct lttng_event_rule *rule = NULL;
+ struct lttng_event_rule_log4j_logging *tp_rule;
+ enum lttng_event_rule_status status;
+
+ tp_rule = zmalloc(sizeof(struct lttng_event_rule_log4j_logging));
+ if (!tp_rule) {
+ goto end;
+ }
+
+ rule = &tp_rule->parent;
+ lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING);
+ tp_rule->parent.validate = lttng_event_rule_log4j_logging_validate;
+ tp_rule->parent.serialize = lttng_event_rule_log4j_logging_serialize;
+ tp_rule->parent.equal = lttng_event_rule_log4j_logging_is_equal;
+ tp_rule->parent.destroy = lttng_event_rule_log4j_logging_destroy;
+ tp_rule->parent.generate_filter_bytecode =
+ lttng_event_rule_log4j_logging_generate_filter_bytecode;
+ tp_rule->parent.get_filter =
+ lttng_event_rule_log4j_logging_get_internal_filter;
+ tp_rule->parent.get_filter_bytecode =
+ lttng_event_rule_log4j_logging_get_internal_filter_bytecode;
+ tp_rule->parent.generate_exclusions =
+ lttng_event_rule_log4j_logging_generate_exclusions;
+ tp_rule->parent.hash = lttng_event_rule_log4j_logging_hash;
+ tp_rule->parent.generate_lttng_event =
+ lttng_event_rule_log4j_logging_generate_lttng_event;
+
+ tp_rule->log_level_rule = NULL;
+
+ /* Default pattern is '*'. */
+ status = lttng_event_rule_log4j_logging_set_name_pattern(rule, "*");
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ lttng_event_rule_destroy(rule);
+ rule = NULL;
+ }
+
+end:
+ return rule;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_event_rule_log4j_logging_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_event_rule **_event_rule)
+{
+ ssize_t ret, offset = 0;
+ enum lttng_event_rule_status status;
+ const struct lttng_event_rule_log4j_logging_comm *log4j_logging_comm;
+ const char *pattern;
+ const char *filter_expression = NULL;
+ 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(*log4j_logging_comm));
+ if (!lttng_buffer_view_is_valid(¤t_buffer_view)) {
+ ERR("Failed to initialize from malformed event rule log4j_logging: buffer too short to contain header.");
+ ret = -1;
+ goto end;
+ }
+
+ log4j_logging_comm = (typeof(log4j_logging_comm)) current_buffer_view.data;
+
+ rule = lttng_event_rule_log4j_logging_create();
+ if (!rule) {
+ ERR("Failed to create event rule log4j_logging.");
+ 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, log4j_logging_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,
+ log4j_logging_comm->pattern_len)) {
+ ret = -1;
+ goto end;
+ }
+
+ /* Skip after the pattern. */
+ offset += log4j_logging_comm->pattern_len;
+
+ if (!log4j_logging_comm->filter_expression_len) {
+ goto skip_filter_expression;
+ }
+
+ /* Map the filter_expression. */
+ current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset,
+ log4j_logging_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,
+ log4j_logging_comm->filter_expression_len)) {
+ ret = -1;
+ goto end;
+ }
+
+ /* Skip after the pattern. */
+ offset += log4j_logging_comm->filter_expression_len;
+
+skip_filter_expression:
+ if (!log4j_logging_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,
+ log4j_logging_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;
+ }
+
+ assert(ret == log4j_logging_comm->log_level_rule_len);
+ }
+
+ /* Skip after the log level rule. */
+ offset += log4j_logging_comm->log_level_rule_len;
+
+skip_log_level_rule:
+
+ status = lttng_event_rule_log4j_logging_set_name_pattern(rule, pattern);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set event rule log4j_logging pattern.");
+ ret = -1;
+ goto end;
+ }
+
+ if (filter_expression) {
+ status = lttng_event_rule_log4j_logging_set_filter(
+ rule, filter_expression);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set event rule log4j_logging pattern.");
+ ret = -1;
+ goto end;
+ }
+ }
+
+ if (log_level_rule) {
+ status = lttng_event_rule_log4j_logging_set_log_level_rule(
+ rule, log_level_rule);
+ if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+ ERR("Failed to set event rule log4j_logging log level rule.");
+ ret = -1;
+ goto end;
+ }
+ }
+
+ *_event_rule = rule;
+ rule = NULL;
+ ret = offset;
+end:
+ lttng_log_level_rule_destroy(log_level_rule);
+ lttng_event_rule_destroy(rule);
+ return ret;
+}
+
+enum lttng_event_rule_status lttng_event_rule_log4j_logging_set_name_pattern(
+ struct lttng_event_rule *rule, const char *pattern)
+{
+ char *pattern_copy = NULL;
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !pattern ||
+ strlen(pattern) == 0) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, 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(log4j_logging->pattern);
+
+ log4j_logging->pattern = pattern_copy;
+ pattern_copy = NULL;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_log4j_logging_get_name_pattern(
+ const struct lttng_event_rule *rule, const char **pattern)
+{
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !pattern) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+ if (!log4j_logging->pattern) {
+ status = LTTNG_EVENT_RULE_STATUS_UNSET;
+ goto end;
+ }
+
+ *pattern = log4j_logging->pattern;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_log4j_logging_set_filter(
+ struct lttng_event_rule *rule, const char *expression)
+{
+ char *expression_copy = NULL;
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !expression ||
+ strlen(expression) == 0) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+ expression_copy = strdup(expression);
+ if (!expression_copy) {
+ PERROR("Failed to copy filter expression");
+ status = LTTNG_EVENT_RULE_STATUS_ERROR;
+ goto end;
+ }
+
+ if (log4j_logging->filter_expression) {
+ free(log4j_logging->filter_expression);
+ }
+
+ log4j_logging->filter_expression = expression_copy;
+ expression_copy = NULL;
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_log4j_logging_get_filter(
+ const struct lttng_event_rule *rule, const char **expression)
+{
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !expression) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+ if (!log4j_logging->filter_expression) {
+ status = LTTNG_EVENT_RULE_STATUS_UNSET;
+ goto end;
+ }
+
+ *expression = log4j_logging->filter_expression;
+end:
+ return status;
+}
+
+static bool log_level_rule_valid(const struct lttng_log_level_rule *rule)
+{
+ /*
+ * For both LOG4J custom log level are possible and can
+ * span the entire int32 range.
+ */
+ return true;
+}
+
+enum lttng_event_rule_status lttng_event_rule_log4j_logging_set_log_level_rule(
+ struct lttng_event_rule *rule,
+ const struct lttng_log_level_rule *log_level_rule)
+{
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+ struct lttng_log_level_rule *copy = NULL;
+
+ if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule)) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, 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 (log4j_logging->log_level_rule) {
+ lttng_log_level_rule_destroy(log4j_logging->log_level_rule);
+ }
+
+ log4j_logging->log_level_rule = copy;
+
+end:
+ return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_log4j_logging_get_log_level_rule(
+ const struct lttng_event_rule *rule,
+ const struct lttng_log_level_rule **log_level_rule
+ )
+{
+ struct lttng_event_rule_log4j_logging *log4j_logging;
+ enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+ if (!rule || !IS_LOG4J_LOGGING_EVENT_RULE(rule) || !log_level_rule) {
+ status = LTTNG_EVENT_RULE_STATUS_INVALID;
+ goto end;
+ }
+
+ log4j_logging = container_of(
+ rule, struct lttng_event_rule_log4j_logging, parent);
+ if (log4j_logging->log_level_rule == NULL) {
+ status = LTTNG_EVENT_RULE_STATUS_UNSET;
+ goto end;
+ }
+
+ *log_level_rule = log4j_logging->log_level_rule;
+end:
+ return status;
+}
projects / lttng-tools.git / commitdiff
