Add kernel uid/gid contexts
[lttng-tools.git] / src / common / config / session-config.c
index 5b5adbfc42afa3d761325cd1708ebf9c3e029b46..c2ae5e1201fb0cf0b4ef51c438ee74d48fe6d86f 100644 (file)
@@ -90,16 +90,16 @@ const char * const config_element_symbol_name = "symbol_name";
 const char * const config_element_address = "address";
 const char * const config_element_offset = "offset";
 
-const char * const config_element_userspace_probe_lookup = "lookup_method";
-const char * const config_element_userspace_probe_lookup_function_default = "DEFAULT";
-const char * const config_element_userspace_probe_lookup_function_elf = "ELF";
-const char * const config_element_userspace_probe_lookup_tracepoint_sdt = "SDT";
-const char * const config_element_userspace_probe_location_binary_path = "binary_path";
-const char * const config_element_userspace_probe_function_attributes = "userspace_probe_function_attributes";
-const char * const config_element_userspace_probe_function_location_function_name = "function_name";
-const char * const config_element_userspace_probe_tracepoint_attributes = "userspace_probe_tracepoint_attributes";
-const char * const config_element_userspace_probe_tracepoint_location_provider_name = "provider_name";
-const char * const config_element_userspace_probe_tracepoint_location_probe_name = "probe_name";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_lookup = "lookup_method";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_lookup_function_default = "DEFAULT";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_lookup_function_elf = "ELF";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_lookup_tracepoint_sdt = "SDT";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_location_binary_path = "binary_path";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_function_attributes = "userspace_probe_function_attributes";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_function_location_function_name = "function_name";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_tracepoint_attributes = "userspace_probe_tracepoint_attributes";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_tracepoint_location_provider_name = "provider_name";
+LTTNG_HIDDEN const char * const config_element_userspace_probe_tracepoint_location_probe_name = "probe_name";
 
 const char * const config_element_name = "name";
 const char * const config_element_enabled = "enabled";
@@ -177,7 +177,7 @@ const char * const config_loglevel_type_single = "SINGLE";
 const char * const config_event_type_all = "ALL";
 const char * const config_event_type_tracepoint = "TRACEPOINT";
 const char * const config_event_type_probe = "PROBE";
-const char * const config_event_type_userspace_probe = "USERSPACE_PROBE";
+LTTNG_HIDDEN const char * const config_event_type_userspace_probe = "USERSPACE_PROBE";
 const char * const config_event_type_function = "FUNCTION";
 const char * const config_event_type_function_entry = "FUNCTION_ENTRY";
 const char * const config_event_type_noop = "NOOP";
@@ -205,6 +205,25 @@ LTTNG_HIDDEN const char * const config_event_context_need_reschedule = "NEED_RES
 LTTNG_HIDDEN const char * const config_event_context_migratable = "MIGRATABLE";
 LTTNG_HIDDEN const char * const config_event_context_callstack_user= "CALLSTACK_USER";
 LTTNG_HIDDEN const char * const config_event_context_callstack_kernel = "CALLSTACK_KERNEL";
+LTTNG_HIDDEN const char * const config_event_context_cgroup_ns = "CGROUP_NS";
+LTTNG_HIDDEN const char * const config_event_context_ipc_ns = "IPC_NS";
+LTTNG_HIDDEN const char * const config_event_context_mnt_ns = "MNT_NS";
+LTTNG_HIDDEN const char * const config_event_context_net_ns = "NET_NS";
+LTTNG_HIDDEN const char * const config_event_context_pid_ns = "PID_NS";
+LTTNG_HIDDEN const char * const config_event_context_user_ns = "USER_NS";
+LTTNG_HIDDEN const char * const config_event_context_uts_ns = "UTS_NS";
+LTTNG_HIDDEN const char * const config_event_context_uid = "UID";
+LTTNG_HIDDEN const char * const config_event_context_euid = "EUID";
+LTTNG_HIDDEN const char * const config_event_context_suid = "SUID";
+LTTNG_HIDDEN const char * const config_event_context_gid = "GID";
+LTTNG_HIDDEN const char * const config_event_context_egid = "EGID";
+LTTNG_HIDDEN const char * const config_event_context_sgid = "SGID";
+LTTNG_HIDDEN const char * const config_event_context_vuid = "VUID";
+LTTNG_HIDDEN const char * const config_event_context_veuid = "VEUID";
+LTTNG_HIDDEN const char * const config_event_context_vsuid = "VSUID";
+LTTNG_HIDDEN const char * const config_event_context_vgid = "VGID";
+LTTNG_HIDDEN const char * const config_event_context_vegid = "VEGID";
+LTTNG_HIDDEN const char * const config_event_context_vsgid = "VSGID";
 
 /* Deprecated symbols */
 const char * const config_element_perf;
@@ -250,7 +269,7 @@ int config_get_section_entries(const char *override_path, const char *section,
                config_entry_handler_cb handler, void *user_data)
 {
        int ret = 0;
-       char *path;
+       const char *path;
        FILE *config_file = NULL;
        struct handler_filter_args filter = { section, handler, user_data };
 
@@ -1047,6 +1066,63 @@ int get_context_type(xmlChar *context_type)
        } else if (!strcmp((char *) context_type,
                config_event_context_callstack_kernel)) {
                ret = LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_cgroup_ns)) {
+               ret = LTTNG_EVENT_CONTEXT_CGROUP_NS;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_ipc_ns)) {
+               ret = LTTNG_EVENT_CONTEXT_IPC_NS;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_mnt_ns)) {
+               ret = LTTNG_EVENT_CONTEXT_MNT_NS;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_net_ns)) {
+               ret = LTTNG_EVENT_CONTEXT_NET_NS;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_pid_ns)) {
+               ret = LTTNG_EVENT_CONTEXT_PID_NS;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_user_ns)) {
+               ret = LTTNG_EVENT_CONTEXT_USER_NS;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_uts_ns)) {
+               ret = LTTNG_EVENT_CONTEXT_UTS_NS;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_uid)) {
+               ret = LTTNG_EVENT_CONTEXT_UID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_euid)) {
+               ret = LTTNG_EVENT_CONTEXT_EUID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_suid)) {
+               ret = LTTNG_EVENT_CONTEXT_SUID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_gid)) {
+               ret = LTTNG_EVENT_CONTEXT_GID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_egid)) {
+               ret = LTTNG_EVENT_CONTEXT_EGID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_sgid)) {
+               ret = LTTNG_EVENT_CONTEXT_SGID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_vuid)) {
+               ret = LTTNG_EVENT_CONTEXT_VUID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_veuid)) {
+               ret = LTTNG_EVENT_CONTEXT_VEUID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_vsuid)) {
+               ret = LTTNG_EVENT_CONTEXT_VSUID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_vgid)) {
+               ret = LTTNG_EVENT_CONTEXT_VGID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_vegid)) {
+               ret = LTTNG_EVENT_CONTEXT_VEGID;
+       } else if (!strcmp((char *) context_type,
+               config_event_context_vsgid)) {
+               ret = LTTNG_EVENT_CONTEXT_VSGID;
        } else {
                goto error;
        }
@@ -1479,9 +1555,8 @@ struct lttng_userspace_probe_location *
 process_userspace_probe_function_attribute_node(
                xmlNodePtr attribute_node)
 {
-       xmlChar *content;
        xmlNodePtr function_attribute_node;
-       char *function_name = NULL, *binary_path = NULL, *lookup_method_name;
+       char *function_name = NULL, *binary_path = NULL;
        struct lttng_userspace_probe_location *location = NULL;
        struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL;
 
@@ -1499,42 +1574,23 @@ process_userspace_probe_function_attribute_node(
                /* Handle function name, binary path and lookup method. */
                if (!strcmp((const char *) function_attribute_node->name,
                                        config_element_userspace_probe_function_location_function_name)) {
-                       content = xmlNodeGetContent(function_attribute_node);
-                       if (!content) {
-                               goto error;
-                       }
-
-                       function_name = lttng_strndup((char *) content, LTTNG_SYMBOL_NAME_LEN);
-                       free(content);
+                       function_name = (char *) xmlNodeGetContent(function_attribute_node);
                        if (!function_name) {
-                               PERROR("Error duplicating function name");
                                goto error;
                        }
                } else if (!strcmp((const char *) function_attribute_node->name,
                                        config_element_userspace_probe_location_binary_path)) {
-                       content = xmlNodeGetContent(function_attribute_node);
-                       if (!content) {
-                               goto error;
-                       }
-
-                       binary_path = lttng_strndup((char *) content, LTTNG_PATH_MAX);
-                       free(content);
+                       binary_path = (char *) xmlNodeGetContent(function_attribute_node);
                        if (!binary_path) {
-                               PERROR("Error duplicating binary path");
                                goto error;
                        }
                } else if (!strcmp((const char *) function_attribute_node->name,
                                        config_element_userspace_probe_lookup)) {
-                       content = xmlNodeGetContent(function_attribute_node);
-                       if (!content) {
-                               goto error;
-                       }
+                       char *lookup_method_name;
 
-                       lookup_method_name = lttng_strndup((char *) content,
-                                       CONFIG_USERSPACE_PROBE_LOOKUP_METHOD_NAME_MAX_LEN);
-                       free(content);
+                       lookup_method_name = (char *) xmlNodeGetContent(
+                                       function_attribute_node);
                        if (!lookup_method_name) {
-                               PERROR("Error duplicating lookup method name");
                                goto error;
                        }
 
@@ -1547,12 +1603,13 @@ process_userspace_probe_function_attribute_node(
                                lookup_method = lttng_userspace_probe_location_lookup_method_function_elf_create();
                                if (!lookup_method) {
                                        PERROR("Error creating function default/ELF lookup method");
-                                       free(lookup_method_name);
-                                       goto error;
                                }
                        } else {
-                               WARN("Unknown function lookup method.");
-                               free(lookup_method_name);
+                               WARN("Unknown function lookup method");
+                       }
+
+                       free(lookup_method_name);
+                       if (!lookup_method) {
                                goto error;
                        }
                } else {
@@ -1561,20 +1618,19 @@ process_userspace_probe_function_attribute_node(
 
                /* Check if all the necessary fields were found. */
                if (binary_path && function_name && lookup_method) {
+                       /* Ownership of lookup_method is transferred. */
                        location =
                                lttng_userspace_probe_location_function_create(
                                                binary_path, function_name,
                                                lookup_method);
-                       goto end;
+                       lookup_method = NULL;
+                       goto error;
                }
        }
 error:
+       lttng_userspace_probe_location_lookup_method_destroy(lookup_method);
        free(binary_path);
        free(function_name);
-       if (lookup_method) {
-               lttng_userspace_probe_location_lookup_method_destroy(lookup_method);
-       }
-end:
        return location;
 }
 
@@ -1583,9 +1639,7 @@ struct lttng_userspace_probe_location *
 process_userspace_probe_tracepoint_attribute_node(
                xmlNodePtr attribute_node)
 {
-       xmlChar *content;
        xmlNodePtr tracepoint_attribute_node;
-       char *lookup_method_name = NULL;
        char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL;
        struct lttng_userspace_probe_location *location = NULL;
        struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL;
@@ -1602,58 +1656,29 @@ process_userspace_probe_tracepoint_attribute_node(
                                tracepoint_attribute_node)) {
                if (!strcmp((const char *) tracepoint_attribute_node->name,
                                        config_element_userspace_probe_tracepoint_location_probe_name)) {
-                       content = xmlNodeGetContent(tracepoint_attribute_node);
-                       if (!content) {
-                               goto error;
-                       }
-
-                       probe_name = lttng_strndup((char*) content, LTTNG_SYMBOL_NAME_LEN);
-                       free(content);
+                       probe_name = (char *) xmlNodeGetContent(tracepoint_attribute_node);
                        if (!probe_name) {
-                               PERROR("Error duplicating probe name");
                                goto error;
                        }
                } else if (!strcmp((const char *) tracepoint_attribute_node->name,
                                        config_element_userspace_probe_tracepoint_location_provider_name)) {
-                       content = xmlNodeGetContent(tracepoint_attribute_node);
-                       if (!content) {
-                               goto error;
-                       }
-
-                       provider_name = lttng_strndup((char*) content, LTTNG_SYMBOL_NAME_LEN);
-                       free(content);
+                       provider_name = (char *) xmlNodeGetContent(tracepoint_attribute_node);
                        if (!provider_name) {
-                               PERROR("Error duplicating provider name");
                                goto error;
                        }
                } else if (!strcmp((const char *) tracepoint_attribute_node->name,
                                        config_element_userspace_probe_location_binary_path)) {
-                       content = xmlNodeGetContent(tracepoint_attribute_node);
-                       if (!content) {
-                               goto error;
-                       }
-
-                       binary_path = lttng_strndup((char*) content, LTTNG_PATH_MAX);
-
-                       free(content);
-
+                       binary_path = (char *) xmlNodeGetContent(tracepoint_attribute_node);
                        if (!binary_path) {
-                               PERROR("Error duplicating binary path");
                                goto error;
                        }
                } else if (!strcmp((const char *) tracepoint_attribute_node->name,
                                        config_element_userspace_probe_lookup)) {
-                       content = xmlNodeGetContent(tracepoint_attribute_node);
-                       if (!content) {
-                               goto error;
-                       }
-
-                       lookup_method_name = lttng_strndup((char *) content,
-                                       CONFIG_USERSPACE_PROBE_LOOKUP_METHOD_NAME_MAX_LEN);
-                       free(content);
+                       char *lookup_method_name;
 
+                       lookup_method_name = (char *) xmlNodeGetContent(
+                                       tracepoint_attribute_node);
                        if (!lookup_method_name) {
-                               PERROR("Error duplicating lookup method name");
                                goto error;
                        }
 
@@ -1663,35 +1688,36 @@ process_userspace_probe_tracepoint_attribute_node(
                                        lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create();
                                if (!lookup_method) {
                                        PERROR("Error creating tracepoint SDT lookup method");
-                                       free(lookup_method_name);
-                                       goto error;
                                }
                        } else {
-                               WARN("Unknown tracepoint lookup method.");
+                               WARN("Unknown tracepoint lookup method");
+                       }
+
+                       free(lookup_method_name);
+                       if (!lookup_method) {
                                goto error;
                        }
                } else {
-                       WARN("Unknown tracepoint attribute.");
+                       WARN("Unknown tracepoint attribute");
                        goto error;
                }
 
                /* Check if all the necessary fields were found. */
                if (binary_path && provider_name && probe_name && lookup_method) {
+                       /* Ownership of lookup_method is transferred. */
                        location =
                                lttng_userspace_probe_location_tracepoint_create(
                                                binary_path, provider_name,
                                                probe_name, lookup_method);
-                       goto end;
+                       lookup_method = NULL;
+                       goto error;
                }
        }
 error:
+       lttng_userspace_probe_location_lookup_method_destroy(lookup_method);
        free(binary_path);
-       free(probe_name);
        free(provider_name);
-       if (lookup_method) {
-               lttng_userspace_probe_location_lookup_method_destroy(lookup_method);
-       }
-end:
+       free(probe_name);
        return location;
 }
 
@@ -2103,6 +2129,7 @@ end:
                free(exclusions[i]);
        }
 
+       lttng_event_destroy(event);
        free(exclusions);
        free(filter_expression);
        return ret;
@@ -3581,7 +3608,7 @@ int config_load_session(const char *path, const char *session_name,
        }
 
        if (!path) {
-               char *home_path;
+               const char *home_path;
                const char *sys_path;
 
                /* Try home path */
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