event-rule: introduce event rule tracepoint
authorJonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Wed, 11 Mar 2020 17:58:48 +0000 (13:58 -0400)
committerJérémie Galarneau <jeremie.galarneau@efficios.com>
Fri, 11 Sep 2020 15:19:27 +0000 (11:19 -0400)
Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: I77495a7b0e359e6f513dfc862dec65b4946d08ba

include/Makefile.am
include/lttng/event-rule/tracepoint-internal.h [new file with mode: 0644]
include/lttng/event-rule/tracepoint.h [new file with mode: 0644]
include/lttng/lttng.h
src/common/Makefile.am
src/common/event-rule/event-rule.c
src/common/event-rule/tracepoint.c [new file with mode: 0644]

index b5875cd6686574b9d33efd5fc96df3005d9dc9e7..1cfcd832012f03a4e7b997d22ce29d581441809e 100644 (file)
@@ -147,7 +147,8 @@ lttngeventruleinclude_HEADERS= \
        lttng/event-rule/event-rule.h \
        lttng/event-rule/kprobe.h \
        lttng/event-rule/syscall.h \
-       lttng/event-rule/uprobe.h
+       lttng/event-rule/uprobe.h \
+       lttng/event-rule/tracepoint.h
 
 noinst_HEADERS = \
        lttng/snapshot-internal.h \
@@ -183,5 +184,6 @@ noinst_HEADERS = \
        lttng/event-rule/kprobe-internal.h \
        lttng/event-rule/syscall-internal.h \
        lttng/event-rule/uprobe-internal.h \
+       lttng/event-rule/tracepoint-internal.h \
        version.h \
        version.i
diff --git a/include/lttng/event-rule/tracepoint-internal.h b/include/lttng/event-rule/tracepoint-internal.h
new file mode 100644 (file)
index 0000000..039b0a6
--- /dev/null
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_EVENT_RULE_TRACEPOINT_INTERNAL_H
+#define LTTNG_EVENT_RULE_TRACEPOINT_INTERNAL_H
+
+#include <common/payload-view.h>
+#include <common/macros.h>
+#include <lttng/domain.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/tracepoint.h>
+#include <lttng/event.h>
+
+struct lttng_event_rule_tracepoint {
+       struct lttng_event_rule parent;
+
+       /* Domain. */
+       enum lttng_domain_type domain;
+
+       /* Name pattern. */
+       char *pattern;
+
+       /* Filter. */
+       char *filter_expression;
+
+       /* Loglevel. */
+       struct {
+               enum lttng_loglevel_type type;
+               int value;
+       } loglevel;
+
+       /* Exclusions. */
+       struct lttng_dynamic_pointer_array exclusions;
+
+       /* internal use only. */
+       struct {
+               char *filter;
+               struct lttng_filter_bytecode *bytecode;
+       } internal_filter;
+};
+
+struct lttng_event_rule_tracepoint_comm {
+       /* enum lttng_domain_type. */
+       int8_t domain_type;
+       /* enum lttng_event_logleven_type. */
+       int8_t loglevel_type;
+       int32_t loglevel_value;
+       /* Includes terminator `\0`. */
+       uint32_t pattern_len;
+       /* Includes terminator `\0`. */
+       uint32_t filter_expression_len;
+       uint32_t exclusions_count;
+       uint32_t exclusions_len;
+       /*
+        * Payload is composed of, in that order:
+        *   - pattern (null terminated),
+        *   - filter expression (null terminated),
+        *   - exclusions (32 bit length + null terminated string).
+        */
+       char payload[];
+} LTTNG_PACKED;
+
+LTTNG_HIDDEN
+ssize_t lttng_event_rule_tracepoint_create_from_payload(
+               struct lttng_payload_view *view,
+               struct lttng_event_rule **rule);
+
+#endif /* LTTNG_EVENT_RULE_TRACEPOINT_INTERNAL_H */
diff --git a/include/lttng/event-rule/tracepoint.h b/include/lttng/event-rule/tracepoint.h
new file mode 100644 (file)
index 0000000..e24b0fb
--- /dev/null
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_EVENT_RULE_TRACEPOINT_H
+#define LTTNG_EVENT_RULE_TRACEPOINT_H
+
+#include <lttng/domain.h>
+#include <lttng/event-rule/event-rule.h>
+#include <lttng/event.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Create a newly allocated tracepoint event rule.
+ *
+ * Returns a new event rule on success, NULL on failure. This event rule must be
+ * destroyed using lttng_event_rule_destroy().
+ */
+extern struct lttng_event_rule *lttng_event_rule_tracepoint_create(
+               enum lttng_domain_type domain);
+
+/*
+ * Set the pattern of a tracepoint event rule.
+ *
+ * Pattern can contain wildcard '*'. See man lttng-enable-event.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern(
+               struct lttng_event_rule *rule, const char *pattern);
+
+/*
+ * Get the pattern of a tracepoint event rule.
+ *
+ * The caller does not assume the ownership of the returned pattern. The
+ * pattern shall only only be used for the duration of the event rule's
+ * lifetime, or before a different pattern is set.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's pattern
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid
+ * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a pattern
+ * was not set prior to this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern(
+               const struct lttng_event_rule *rule, const char **pattern);
+
+/*
+ * Get the domain type of a tracepoint event rule.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the domain type output parameter
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a pattern was not set prior to
+ * this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_get_domain_type(
+               const struct lttng_event_rule *rule,
+               enum lttng_domain_type *type);
+
+/*
+ * Set the filter expression of a tracepoint event rule.
+ *
+ * The expression is copied internally.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter(
+               struct lttng_event_rule *rule, const char *expression);
+
+/*
+ * Get the filter expression of a tracepoint event rule.
+ *
+ * The caller does not assume the ownership of the returned filter expression.
+ * The filter expression shall only only be used for the duration of the event
+ * rule's lifetime, or before a different filter expression is set.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's filter
+ * expression on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid
+ * parameter is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a filter expression
+ * was not set prior to this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_get_filter(
+               const struct lttng_event_rule *rule, const char **expression);
+
+/*
+ * Set the single log level of a tracepoint event rule.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level(
+               struct lttng_event_rule *rule, int level);
+
+/*
+ * Set the log level range lower bound of a tracepoint event rule.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_set_log_level_range_lower_bound(
+               struct lttng_event_rule *rule, int level);
+
+/*
+ * Set the log level to all of a tracepoint event rule.
+ *
+ * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
+ * if invalid parameters are passed.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_set_log_level_all(struct lttng_event_rule *rule);
+
+/*
+ * Get the log level type of a tracepoint event rule.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the log level type output
+ * parameter on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter
+ * is passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a log level was not set prior
+ * to this call.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_get_log_level_type(
+               const struct lttng_event_rule *rule,
+               enum lttng_loglevel_type *type);
+
+/*
+ * Get the log level of a tracepoint event rule.
+ *
+ * For range log level , the lower bound log level is returned.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the log level output parameter
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a log level was not set prior to
+ * this call.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level(
+               const struct lttng_event_rule *rule, int *level);
+
+/*
+ * Add an exclusion to the set of exclusion of an event rule.
+ *
+ * The passed exclusion will be copied to the event_rule.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK on success,
+ * LTTNG_EVENT_RULE_STATUS_INVALID if invalid parameters are passed, or
+ * LTTNG_EVENT_RULE_STATUS_UNSUPPORTED if this property is not supported by the
+ * domain.
+ */
+extern enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion(
+               struct lttng_event_rule *rule,
+               const char *exclusion);
+
+/*
+ * Get the exclusions property count of an event rule.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the count output parameter
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_get_exclusions_count(
+               const struct lttng_event_rule *rule, unsigned int *count);
+
+/*
+ * Get the event rule exclusion at the given index.
+ *
+ * Returns LTTNG_EVENT_RULE_STATUS_OK and sets the exclusion output parameter
+ * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
+ * passed.
+ */
+extern enum lttng_event_rule_status
+lttng_event_rule_tracepoint_get_exclusion_at_index(
+               const struct lttng_event_rule *rule,
+               unsigned int index,
+               const char **exclusion);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LTTNG_EVENT_RULE_TRACEPOINT_H */
index c248eceb93aa83380db875d5ad403436a16e942f..1049e0f0d31e35fcebfedb3e440462007859966c 100644 (file)
@@ -37,6 +37,7 @@
 #include <lttng/event-rule/event-rule.h>
 #include <lttng/event-rule/kprobe.h>
 #include <lttng/event-rule/syscall.h>
+#include <lttng/event-rule/tracepoint.h>
 #include <lttng/event-rule/uprobe.h>
 #include <lttng/event.h>
 #include <lttng/handle.h>
index 7c2ab3e3a193dfa663827a54a8ba8f598cd8fc82..f6918b54c79d1d1466f8a34006f4168fc7a31999 100644 (file)
@@ -52,6 +52,7 @@ libcommon_la_SOURCES = \
        event-rule/kprobe.c \
        event-rule/syscall.c \
        event-rule/uprobe.c \
+       event-rule/tracepoint.c \
        filter.c filter.h \
        fd-handle.c fd-handle.h \
        fs-handle.c fs-handle.h fs-handle-internal.h \
index 8e9b003c8d39ab3ee1f0725ba518548029cc0f8e..cdf3e0dedbea19b357fcb68a8342a26cf27c44ef 100644 (file)
@@ -14,6 +14,7 @@
 #include <lttng/event-rule/event-rule-internal.h>
 #include <lttng/event-rule/kprobe-internal.h>
 #include <lttng/event-rule/syscall-internal.h>
+#include <lttng/event-rule/tracepoint-internal.h>
 #include <lttng/event-rule/uprobe-internal.h>
 #include <stdbool.h>
 
@@ -31,9 +32,12 @@ enum lttng_domain_type lttng_event_rule_get_domain_type(
 
        switch (lttng_event_rule_get_type(event_rule)) {
        case LTTNG_EVENT_RULE_TYPE_TRACEPOINT:
-               /* TODO */
-               domain_type = LTTNG_DOMAIN_NONE;
+       {
+               enum lttng_event_rule_status status;
+               status = lttng_event_rule_tracepoint_get_domain_type(event_rule, &domain_type);
+               assert(status == LTTNG_EVENT_RULE_STATUS_OK);
                break;
+       }
        case LTTNG_EVENT_RULE_TYPE_SYSCALL:
        case LTTNG_EVENT_RULE_TYPE_KPROBE:
        case LTTNG_EVENT_RULE_TYPE_KRETPROBE:
@@ -155,7 +159,8 @@ ssize_t lttng_event_rule_create_from_payload(
 
        switch ((enum lttng_event_rule_type) event_rule_comm->event_rule_type) {
        case LTTNG_EVENT_RULE_TYPE_TRACEPOINT:
-               /* TODO */
+               create_from_payload =
+                               lttng_event_rule_tracepoint_create_from_payload;
                break;
        case LTTNG_EVENT_RULE_TYPE_KPROBE:
                create_from_payload = lttng_event_rule_kprobe_create_from_payload;
diff --git a/src/common/event-rule/tracepoint.c b/src/common/event-rule/tracepoint.c
new file mode 100644 (file)
index 0000000..14e4c7b
--- /dev/null
@@ -0,0 +1,1155 @@
+/*
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <assert.h>
+#include <common/error.h>
+#include <common/macros.h>
+#include <common/payload.h>
+#include <common/payload-view.h>
+#include <common/runas.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/tracepoint-internal.h>
+
+#define IS_TRACEPOINT_EVENT_RULE(rule) \
+       (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_TRACEPOINT)
+
+static void lttng_event_rule_tracepoint_destroy(struct lttng_event_rule *rule)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+
+       if (rule == NULL) {
+               return;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+
+       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_tracepoint_validate(
+               const struct lttng_event_rule *rule)
+{
+       bool valid = false;
+       struct lttng_event_rule_tracepoint *tracepoint;
+
+       if (!rule) {
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+
+       /* Required field. */
+       if (!tracepoint->pattern) {
+               ERR("Invalid tracepoint event rule: a pattern must be set.");
+               goto end;
+       }
+
+       /* Required field. */
+       if (tracepoint->domain == LTTNG_DOMAIN_NONE) {
+               ERR("Invalid tracepoint event rule: a domain must be set.");
+               goto end;
+       }
+
+       valid = true;
+end:
+       return valid;
+}
+
+static int lttng_event_rule_tracepoint_serialize(
+               const struct lttng_event_rule *rule,
+               struct lttng_payload *payload)
+{
+       int ret, i;
+       size_t pattern_len, filter_expression_len, exclusions_len;
+       struct lttng_event_rule_tracepoint *tracepoint;
+       struct lttng_event_rule_tracepoint_comm tracepoint_comm;
+       enum lttng_event_rule_status status;
+       unsigned int exclusion_count;
+       size_t exclusions_appended_len = 0;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
+               ret = -1;
+               goto end;
+       }
+
+       DBG("Serializing tracepoint event rule.");
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+
+       status = lttng_event_rule_tracepoint_get_exclusions_count(rule, &exclusion_count);
+       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_tracepoint_get_exclusion_at_index(
+                               rule, i, &exclusion);
+               assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+               /* Length field. */
+               exclusions_len += sizeof(uint32_t);
+               /* Payload (null terminated). */
+               exclusions_len += strlen(exclusion) + 1;
+       }
+
+       tracepoint_comm.domain_type = (int8_t) tracepoint->domain;
+       tracepoint_comm.loglevel_type = (int8_t) tracepoint->loglevel.type;
+       tracepoint_comm.loglevel_value = tracepoint->loglevel.value;
+       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;
+       }
+
+       for (i = 0; i < exclusion_count; i++) {
+               size_t len;
+               const char *exclusion;
+
+               status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+                               rule, i, &exclusion);
+               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;
+       }
+
+       assert(exclusions_len == exclusions_appended_len);
+
+end:
+       return ret;
+}
+
+static bool lttng_event_rule_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_tracepoint *a, *b;
+       unsigned int count_a, count_b;
+       enum lttng_event_rule_status status;
+
+       a = container_of(_a, struct lttng_event_rule_tracepoint, parent);
+       b = container_of(_b, struct lttng_event_rule_tracepoint, parent);
+
+       status = lttng_event_rule_tracepoint_get_exclusions_count(_a, &count_a);
+       assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+       status = lttng_event_rule_tracepoint_get_exclusions_count(_b, &count_b);
+       assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+       /* Quick checks. */
+       if (a->domain != b->domain) {
+               goto end;
+       }
+
+       if (count_a != count_b) {
+               goto end;
+       }
+
+       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 (a->loglevel.type != b->loglevel.type) {
+               goto end;
+       }
+
+       if (a->loglevel.value != b->loglevel.value) {
+               goto end;
+       }
+
+       for (i = 0; i < count_a; i++) {
+               const char *exclusion_a, *exclusion_b;
+
+               status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+                               _a, i, &exclusion_a);
+               assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+               status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+                               _b, i, &exclusion_b);
+               assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+               if (strcmp(exclusion_a, exclusion_b)) {
+                       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;
+       enum lttng_loglevel_type loglevel_type;
+       enum lttng_event_rule_status status;
+
+       assert(rule);
+       assert(_agent_filter);
+
+       status = lttng_event_rule_tracepoint_get_pattern(rule, &pattern);
+       if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+               ret = -1;
+               goto end;
+       }
+
+       status = lttng_event_rule_tracepoint_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;
+       }
+
+       status = lttng_event_rule_tracepoint_get_log_level_type(
+                       rule, &loglevel_type);
+       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;
+               }
+       }
+
+       if (loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
+               const char *op;
+               int loglevel_value;
+
+               status = lttng_event_rule_tracepoint_get_log_level(
+                               rule, &loglevel_value);
+               if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+                       ret = -1;
+                       goto end;
+               }
+
+               if (loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) {
+                       op = ">=";
+               } else {
+                       op = "==";
+               }
+
+               if (filter || agent_filter) {
+                       char *new_filter;
+
+                       err = asprintf(&new_filter,
+                                       "(%s) && (int_loglevel %s %d)",
+                                       agent_filter ? agent_filter : filter,
+                                       op, loglevel_value);
+                       if (agent_filter) {
+                               free(agent_filter);
+                       }
+                       agent_filter = new_filter;
+               } else {
+                       err = asprintf(&agent_filter, "int_loglevel %s %d", op,
+                                       loglevel_value);
+               }
+
+               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_tracepoint_generate_filter_bytecode(
+               struct lttng_event_rule *rule, uid_t uid, gid_t gid)
+{
+       int ret;
+       enum lttng_error_code ret_code;
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_domain_type domain_type;
+       enum lttng_event_rule_status status;
+       const char *filter;
+       struct lttng_filter_bytecode *bytecode = NULL;
+
+       assert(rule);
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+
+       status = lttng_event_rule_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;
+       }
+
+       status = lttng_event_rule_tracepoint_get_domain_type(
+                       rule, &domain_type);
+       if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+               ret_code = LTTNG_ERR_UNK;
+               goto error;
+       }
+
+       switch (domain_type) {
+       case LTTNG_DOMAIN_LOG4J:
+       case LTTNG_DOMAIN_JUL:
+       case LTTNG_DOMAIN_PYTHON:
+       {
+               char *agent_filter;
+
+               ret = generate_agent_filter(rule, &agent_filter);
+               if (ret) {
+                       ret_code = LTTNG_ERR_FILTER_INVAL;
+                       goto error;
+               }
+
+               tracepoint->internal_filter.filter = agent_filter;
+               break;
+       }
+       default:
+       {
+               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;
+               }
+               break;
+       }
+       }
+
+       if (tracepoint->internal_filter.filter == NULL) {
+               ret_code = LTTNG_OK;
+               goto end;
+       }
+
+       ret = run_as_generate_filter_bytecode(
+                       tracepoint->internal_filter.filter, uid, gid,
+                       &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_tracepoint_get_internal_filter(
+               const struct lttng_event_rule *rule)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+
+       assert(rule);
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       return tracepoint->internal_filter.filter;
+}
+
+static const struct lttng_filter_bytecode *
+lttng_event_rule_tracepoint_get_internal_filter_bytecode(
+               const struct lttng_event_rule *rule)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+
+       assert(rule);
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       return tracepoint->internal_filter.bytecode;
+}
+
+static struct lttng_event_exclusion *
+lttng_event_rule_tracepoint_generate_exclusions(
+               const struct lttng_event_rule *rule)
+{
+       enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE;
+       enum lttng_event_rule_status status;
+       struct lttng_event_exclusion *local_exclusions = NULL;
+       struct lttng_event_exclusion *ret_exclusions = NULL;
+       unsigned int nb_exclusions = 0;
+       unsigned int i;
+
+       status = lttng_event_rule_tracepoint_get_domain_type(rule, &domain_type);
+       assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+
+       switch (domain_type) {
+       case LTTNG_DOMAIN_KERNEL:
+       case LTTNG_DOMAIN_JUL:
+       case LTTNG_DOMAIN_LOG4J:
+       case LTTNG_DOMAIN_PYTHON:
+               /* Not supported. */
+               ret_exclusions = NULL;
+               goto end;
+       case LTTNG_DOMAIN_UST:
+               /* Exclusions supported. */
+               break;
+       default:
+               abort();
+       }
+
+       status = lttng_event_rule_tracepoint_get_exclusions_count(
+                       rule, &nb_exclusions);
+       assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+       if (nb_exclusions == 0) {
+               /* Nothing to do. */
+               ret_exclusions = NULL;
+               goto end;
+       }
+
+       local_exclusions = zmalloc(sizeof(struct lttng_event_exclusion) +
+                                  (LTTNG_SYMBOL_NAME_LEN * nb_exclusions));
+       if (!local_exclusions) {
+               PERROR("Failed to allocate exclusions buffer");
+               ret_exclusions = NULL;
+               goto end;
+       }
+
+       local_exclusions->count = nb_exclusions;
+       for (i = 0; i < nb_exclusions; i++) {
+               /* Truncation is already checked at the setter level. */
+               const char *tmp;
+
+               status = lttng_event_rule_tracepoint_get_exclusion_at_index(
+                               rule, i, &tmp);
+               assert(status == LTTNG_EVENT_RULE_STATUS_OK);
+               strncpy(local_exclusions->names[i], tmp, LTTNG_SYMBOL_NAME_LEN);
+               local_exclusions->names[i][LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+       }
+
+       /* Pass ownership. */
+       ret_exclusions = local_exclusions;
+       local_exclusions = NULL;
+end:
+       free(local_exclusions);
+       return ret_exclusions;
+}
+
+static void destroy_lttng_exclusions_element(void *ptr)
+{
+       free(ptr);
+}
+
+struct lttng_event_rule *lttng_event_rule_tracepoint_create(
+               enum lttng_domain_type domain_type)
+{
+       struct lttng_event_rule *rule = NULL;
+       struct lttng_event_rule_tracepoint *tp_rule;
+
+       if (domain_type == LTTNG_DOMAIN_NONE) {
+               goto end;
+       }
+
+       tp_rule = zmalloc(sizeof(struct lttng_event_rule_tracepoint));
+       if (!tp_rule) {
+               goto end;
+       }
+
+       rule = &tp_rule->parent;
+       lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_TRACEPOINT);
+       tp_rule->parent.validate = lttng_event_rule_tracepoint_validate;
+       tp_rule->parent.serialize = lttng_event_rule_tracepoint_serialize;
+       tp_rule->parent.equal = lttng_event_rule_tracepoint_is_equal;
+       tp_rule->parent.destroy = lttng_event_rule_tracepoint_destroy;
+       tp_rule->parent.generate_filter_bytecode =
+                       lttng_event_rule_tracepoint_generate_filter_bytecode;
+       tp_rule->parent.get_filter =
+                       lttng_event_rule_tracepoint_get_internal_filter;
+       tp_rule->parent.get_filter_bytecode =
+                       lttng_event_rule_tracepoint_get_internal_filter_bytecode;
+       tp_rule->parent.generate_exclusions =
+                       lttng_event_rule_tracepoint_generate_exclusions;
+
+       tp_rule->domain = domain_type;
+       tp_rule->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL;
+
+       lttng_dynamic_pointer_array_init(&tp_rule->exclusions,
+                       destroy_lttng_exclusions_element);
+end:
+       return rule;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_event_rule_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;
+       enum lttng_domain_type domain_type;
+       enum lttng_loglevel_type loglevel_type;
+       const struct lttng_event_rule_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;
+
+       if (!_event_rule) {
+               ret = -1;
+               goto end;
+       }
+
+       if (view->buffer.size < sizeof(*tracepoint_comm)) {
+               ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header.");
+               ret = -1;
+               goto end;
+       }
+
+       current_buffer_view = lttng_buffer_view_from_view(
+                       &view->buffer, offset, sizeof(*tracepoint_comm));
+       tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data;
+
+       if (!tracepoint_comm) {
+               ret = -1;
+               goto end;
+       }
+
+       if (tracepoint_comm->domain_type <= LTTNG_DOMAIN_NONE ||
+                       tracepoint_comm->domain_type > LTTNG_DOMAIN_PYTHON) {
+               /* Invalid domain value. */
+               ERR("Invalid domain type value (%i) found in tracepoint_comm buffer.",
+                               (int) tracepoint_comm->domain_type);
+               ret = -1;
+               goto end;
+       }
+
+       domain_type = (enum lttng_domain_type) tracepoint_comm->domain_type;
+       rule = lttng_event_rule_tracepoint_create(domain_type);
+       if (!rule) {
+               ERR("Failed to create event rule tracepoint.");
+               ret = -1;
+               goto end;
+       }
+
+       loglevel_type = (enum lttng_loglevel_type)
+                                       tracepoint_comm->loglevel_type;
+       switch (loglevel_type) {
+       case LTTNG_EVENT_LOGLEVEL_ALL:
+               status = lttng_event_rule_tracepoint_set_log_level_all(rule);
+               break;
+       case LTTNG_EVENT_LOGLEVEL_RANGE:
+               status = lttng_event_rule_tracepoint_set_log_level_range_lower_bound(rule,
+                               (enum lttng_loglevel_type) tracepoint_comm
+                                               ->loglevel_value);
+               break;
+       case LTTNG_EVENT_LOGLEVEL_SINGLE:
+               status = lttng_event_rule_tracepoint_set_log_level(rule,
+                               (enum lttng_loglevel_type) tracepoint_comm
+                                               ->loglevel_value);
+               break;
+       default:
+               ERR("Failed to set event rule tracepoint loglevel: unknown loglevel type.");
+               ret = -1;
+               goto end;
+       }
+
+       if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+               ERR("Failed to set event rule tracepoint loglevel.");
+       }
+
+       /* 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);
+       pattern = current_buffer_view.data;
+       if (!pattern) {
+               ret = -1;
+               goto end;
+       }
+
+       if (!lttng_buffer_view_contains_string(&current_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);
+       filter_expression = current_buffer_view.data;
+       if (!filter_expression) {
+               ret = -1;
+               goto end;
+       }
+
+       if (!lttng_buffer_view_contains_string(&current_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:
+       for (i = 0; i < tracepoint_comm->exclusions_count; i++) {
+               current_buffer_view = lttng_buffer_view_from_view(
+                               &view->buffer, offset, sizeof(*exclusion_len));
+               exclusion_len = (typeof(exclusion_len)) current_buffer_view.data;
+               if (!exclusion_len) {
+                       ret = -1;
+                       goto end;
+               }
+
+               offset += sizeof(*exclusion_len);
+               current_buffer_view = lttng_buffer_view_from_view(
+                               &view->buffer, offset, *exclusion_len);
+               exclusion = current_buffer_view.data;
+               if (!lttng_buffer_view_contains_string(&current_buffer_view,
+                               exclusion, *exclusion_len)) {
+                       ret = -1;
+                       goto end;
+               }
+
+               status = lttng_event_rule_tracepoint_add_exclusion(rule, exclusion);
+               if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+                       ERR("Failed to add event rule tracepoint exclusion \"%s\".",
+                                       exclusion);
+                       ret = -1;
+                       goto end;
+               }
+
+               /* Skip to next exclusion. */
+               offset += *exclusion_len;
+       }
+
+       status = lttng_event_rule_tracepoint_set_pattern(rule, pattern);
+       if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+               ERR("Failed to set event rule tracepoint pattern.");
+               ret = -1;
+               goto end;
+       }
+
+       if (filter_expression) {
+               status = lttng_event_rule_tracepoint_set_filter(
+                               rule, filter_expression);
+               if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+                       ERR("Failed to set event rule tracepoint pattern.");
+                       ret = -1;
+                       goto end;
+               }
+       }
+
+       *_event_rule = rule;
+       rule = NULL;
+       ret = offset;
+end:
+       free(exclusions);
+       lttng_event_rule_destroy(rule);
+       return ret;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern(
+               struct lttng_event_rule *rule, const char *pattern)
+{
+       char *pattern_copy = NULL;
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern ||
+                       strlen(pattern) == 0) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       pattern_copy = strdup(pattern);
+       if (!pattern_copy) {
+               status = LTTNG_EVENT_RULE_STATUS_ERROR;
+               goto end;
+       }
+
+       free(tracepoint->pattern);
+
+       tracepoint->pattern = pattern_copy;
+       pattern_copy = NULL;
+end:
+       return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern(
+               const struct lttng_event_rule *rule, const char **pattern)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_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_tracepoint_get_domain_type(
+               const struct lttng_event_rule *rule,
+               enum lttng_domain_type *type)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       *type = tracepoint->domain;
+end:
+       return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter(
+               struct lttng_event_rule *rule, const char *expression)
+{
+       char *expression_copy = NULL;
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression ||
+                       strlen(expression) == 0) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_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_tracepoint_get_filter(
+               const struct lttng_event_rule *rule, const char **expression)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_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_value_valid(
+               int level, enum lttng_domain_type domain)
+{
+       bool valid = false;
+
+       switch (domain) {
+       case LTTNG_DOMAIN_KERNEL:
+       case LTTNG_DOMAIN_UST:
+               if (level < LTTNG_LOGLEVEL_EMERG) {
+                       /* Invalid. */
+                       goto end;
+               }
+               if (level > LTTNG_LOGLEVEL_DEBUG) {
+                       /* Invalid. */
+                       goto end;
+               }
+
+               valid = true;
+               break;
+       case LTTNG_DOMAIN_JUL:
+       case LTTNG_DOMAIN_LOG4J:
+       case LTTNG_DOMAIN_PYTHON:
+               /*
+                * For both JUL and LOG4J custom log level are possible and can
+                * spawn the entire int32 range.
+                * For python, custom log level are possible, it is not clear if
+                * negative value are accepted (NOTSET == 0) but the source code
+                * validate against the int type implying that negative values
+                * are accepted.
+                */
+               valid = true;
+               goto end;
+
+       case LTTNG_DOMAIN_NONE:
+       default:
+               abort();
+       }
+
+end:
+       return valid;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level(
+               struct lttng_event_rule *rule, int level)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+
+       if (!log_level_value_valid(level, tracepoint->domain)) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint->loglevel.value = level;
+       tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_SINGLE;
+end:
+       return status;
+}
+
+enum lttng_event_rule_status
+lttng_event_rule_tracepoint_set_log_level_range_lower_bound(
+               struct lttng_event_rule *rule, int level)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+
+       if (!log_level_value_valid(level, tracepoint->domain)) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint->loglevel.value = level;
+       tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_RANGE;
+end:
+       return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level_all(
+               struct lttng_event_rule *rule)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL;
+end:
+       return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level_type(
+               const struct lttng_event_rule *rule,
+               enum lttng_loglevel_type *type)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       *type = tracepoint->loglevel.type;
+end:
+       return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level(
+               const struct lttng_event_rule *rule, int *level)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !level) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       if (tracepoint->loglevel.type == LTTNG_EVENT_LOGLEVEL_ALL) {
+               status = LTTNG_EVENT_RULE_STATUS_UNSET;
+               goto end;
+       }
+
+       *level = tracepoint->loglevel.value;
+end:
+       return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion(
+               struct lttng_event_rule *rule,
+               const char *exclusion)
+{
+       int ret;
+       char *exclusion_copy = NULL;
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+       enum lttng_domain_type domain_type;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) ||
+                       !exclusion) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+
+       status = lttng_event_rule_tracepoint_get_domain_type(
+                       rule, &domain_type);
+       if (status != LTTNG_EVENT_RULE_STATUS_OK) {
+               goto end;
+       }
+
+       switch (domain_type) {
+       case LTTNG_DOMAIN_KERNEL:
+       case LTTNG_DOMAIN_JUL:
+       case LTTNG_DOMAIN_LOG4J:
+       case LTTNG_DOMAIN_PYTHON:
+               status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED;
+               goto end;
+       case LTTNG_DOMAIN_UST:
+               /* Exclusions supported. */
+               break;
+       default:
+               abort();
+       }
+
+       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_tracepoint_get_exclusions_count(
+               const struct lttng_event_rule *rule, unsigned int *count)
+{
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !count) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions);
+end:
+       return status;
+}
+
+enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusion_at_index(
+               const struct lttng_event_rule *rule,
+               unsigned int index,
+               const char **exclusion)
+{
+       unsigned int count;
+       struct lttng_event_rule_tracepoint *tracepoint;
+       enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK;
+
+       if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !exclusion) {
+               status = LTTNG_EVENT_RULE_STATUS_INVALID;
+               goto end;
+       }
+
+       tracepoint = container_of(
+                       rule, struct lttng_event_rule_tracepoint, parent);
+       if (lttng_event_rule_tracepoint_get_exclusions_count(rule, &count) !=
+                       LTTNG_EVENT_RULE_STATUS_OK) {
+               goto end;
+       }
+
+       if (index >= count) {
+               goto end;
+       }
+
+       *exclusion = lttng_dynamic_pointer_array_get_pointer(
+                       &tracepoint->exclusions, index);
+end:
+       return status;
+}
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