Refactoring: use an opaque lttng_tracker_id type
[lttng-tools.git] / src / common / config / session-config.c
index 40019514bdb27021d63fb1ad563c2e3abe43c7e8..695142a298256a743f9fb1efddb9153a4a242e94 100644 (file)
@@ -61,6 +61,7 @@ struct session_config_validation_ctx {
        xmlSchemaValidCtxtPtr schema_validation_ctx;
 };
 
+const char * const config_element_all = "all";
 const char * const config_str_yes = "yes";
 const char * const config_str_true = "true";
 const char * const config_str_on = "on";
@@ -141,12 +142,25 @@ const char * const config_element_control_uri = "control_uri";
 const char * const config_element_data_uri = "data_uri";
 const char * const config_element_max_size = "max_size";
 const char * const config_element_pid = "pid";
+const char * const config_element_id = "id";
 const char * const config_element_pids = "pids";
 const char * const config_element_shared_memory_path = "shared_memory_path";
 const char * const config_element_pid_tracker = "pid_tracker";
+const char * const config_element_vpid_tracker = "vpid_tracker";
+const char * const config_element_uid_tracker = "uid_tracker";
+const char * const config_element_vuid_tracker = "vuid_tracker";
+const char * const config_element_gid_tracker = "gid_tracker";
+const char * const config_element_vgid_tracker = "vgid_tracker";
 const char * const config_element_trackers = "trackers";
 const char * const config_element_targets = "targets";
+const char * const config_element_target_type = "target_type";
 const char * const config_element_target_pid = "pid_target";
+const char * const config_element_target_vpid = "vpid_target";
+const char * const config_element_target_uid = "uid_target";
+const char * const config_element_target_vuid = "vuid_target";
+const char * const config_element_target_gid = "gid_target";
+const char * const config_element_target_vgid = "vgid_target";
+const char * const config_element_tracker_type = "tracker_type";
 
 LTTNG_HIDDEN const char * const config_element_rotation_schedules = "rotation_schedules";
 LTTNG_HIDDEN const char * const config_element_rotation_schedule_periodic = "periodic";
@@ -177,7 +191,7 @@ 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 +219,25 @@ 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;
@@ -1047,6 +1080,63 @@ 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;
        }
@@ -2585,19 +2675,91 @@ end:
        return ret;
 }
 
-static
-int process_pid_tracker_node(xmlNodePtr pid_tracker_node,
-       struct lttng_handle *handle)
+static int get_tracker_elements(enum lttng_tracker_type tracker_type,
+               const char **element_id_tracker,
+               const char **element_target_id,
+               const char **element_id,
+               const char **element_id_alias,
+               const char **element_name)
+{
+       int ret = 0;
+
+       switch (tracker_type) {
+       case LTTNG_TRACKER_PID:
+               *element_id_tracker = config_element_pid_tracker;
+               *element_target_id = config_element_target_pid;
+               *element_id = config_element_id;
+               *element_id_alias = config_element_pid;
+               *element_name = NULL;
+               break;
+       case LTTNG_TRACKER_VPID:
+               *element_id_tracker = config_element_vpid_tracker;
+               *element_target_id = config_element_target_vpid;
+               *element_id = config_element_id;
+               *element_id_alias = NULL;
+               *element_name = NULL;
+               break;
+       case LTTNG_TRACKER_UID:
+               *element_id_tracker = config_element_uid_tracker;
+               *element_target_id = config_element_target_uid;
+               *element_id = config_element_id;
+               *element_id_alias = NULL;
+               *element_name = config_element_name;
+               break;
+       case LTTNG_TRACKER_VUID:
+               *element_id_tracker = config_element_vuid_tracker;
+               *element_target_id = config_element_target_vuid;
+               *element_id = config_element_id;
+               *element_id_alias = NULL;
+               *element_name = config_element_name;
+               break;
+       case LTTNG_TRACKER_GID:
+               *element_id_tracker = config_element_gid_tracker;
+               *element_target_id = config_element_target_gid;
+               *element_id = config_element_id;
+               *element_id_alias = NULL;
+               *element_name = config_element_name;
+               break;
+       case LTTNG_TRACKER_VGID:
+               *element_id_tracker = config_element_vgid_tracker;
+               *element_target_id = config_element_target_vgid;
+               *element_id = config_element_id;
+               *element_id_alias = NULL;
+               *element_name = config_element_name;
+               break;
+       default:
+               ret = LTTNG_ERR_INVALID;
+       }
+       return ret;
+}
+
+static int process_id_tracker_node(xmlNodePtr id_tracker_node,
+               struct lttng_handle *handle,
+               enum lttng_tracker_type tracker_type)
 {
        int ret = 0, child;
        xmlNodePtr targets_node = NULL;
        xmlNodePtr node;
+       const char *element_id_tracker;
+       const char *element_target_id;
+       const char *element_id;
+       const char *element_id_alias;
+       const char *element_name;
+       enum lttng_tracker_id_status status;
 
        assert(handle);
-       assert(pid_tracker_node);
+       assert(id_tracker_node);
+
+       ret = get_tracker_elements(tracker_type, &element_id_tracker,
+                       &element_target_id, &element_id, &element_id_alias,
+                       &element_name);
+       if (ret) {
+               return ret;
+       }
+
        /* get the targets node */
-       for (node = xmlFirstElementChild(pid_tracker_node); node;
-               node = xmlNextElementSibling(node)) {
+       for (node = xmlFirstElementChild(id_tracker_node); node;
+                       node = xmlNextElementSibling(node)) {
                if (!strcmp((const char *) node->name,
                                config_element_targets)) {
                        targets_node = node;
@@ -2610,26 +2772,42 @@ int process_pid_tracker_node(xmlNodePtr pid_tracker_node,
                goto end;
        }
 
-       /* Go through all pid_target node */
+       /* Go through all id target node */
        child = xmlChildElementCount(targets_node);
        if (child == 0) {
+               struct lttng_tracker_id *tracker_id = NULL;
+               tracker_id = lttng_tracker_id_create();
+               if (tracker_id == NULL) {
+                       ret = LTTNG_ERR_NOMEM;
+                       goto end;
+               }
+               status = lttng_tracker_id_set_all(tracker_id);
+               if (status != LTTNG_TRACKER_ID_STATUS_OK) {
+                       ret = LTTNG_ERR_INVALID;
+                       goto end;
+               }
+
                /* The session is explicitly set to target nothing. */
-               ret = lttng_untrack_pid(handle, -1);
+               ret = lttng_untrack_id(handle, tracker_type, tracker_id);
+               lttng_tracker_id_destroy(tracker_id);
                if (ret) {
                        goto end;
                }
        }
        for (node = xmlFirstElementChild(targets_node); node;
                        node = xmlNextElementSibling(node)) {
-               xmlNodePtr pid_target_node = node;
+               xmlNodePtr id_target_node = node;
 
-               /* get pid node and track it */
-               for (node = xmlFirstElementChild(pid_target_node); node;
-                       node = xmlNextElementSibling(node)) {
-                       if (!strcmp((const char *) node->name,
-                                       config_element_pid)) {
-                               int64_t pid;
+               /* get id node and track it */
+               for (node = xmlFirstElementChild(id_target_node); node;
+                               node = xmlNextElementSibling(node)) {
+                       if (!strcmp((const char *) node->name, element_id) ||
+                                       (element_id_alias &&
+                                                       !strcmp((const char *) node->name,
+                                                                       element_id_alias))) {
+                               int64_t id;
                                xmlChar *content = NULL;
+                               struct lttng_tracker_id *tracker_id = NULL;
 
                                content = xmlNodeGetContent(node);
                                if (!content) {
@@ -2637,20 +2815,69 @@ int process_pid_tracker_node(xmlNodePtr pid_tracker_node,
                                        goto end;
                                }
 
-                               ret = parse_int(content, &pid);
+                               ret = parse_int(content, &id);
                                free(content);
                                if (ret) {
                                        ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
                                        goto end;
                                }
 
-                               ret = lttng_track_pid(handle, (int) pid);
+                               tracker_id = lttng_tracker_id_create();
+                               if (tracker_id == NULL) {
+                                       ret = LTTNG_ERR_NOMEM;
+                                       goto end;
+                               }
+
+                               status = lttng_tracker_id_set_value(
+                                               tracker_id, id);
+                               if (status != LTTNG_TRACKER_ID_STATUS_OK) {
+                                       lttng_tracker_id_destroy(tracker_id);
+                                       ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
+                                       goto end;
+                               }
+
+                               ret = lttng_track_id(handle, tracker_type,
+                                               tracker_id);
+                               lttng_tracker_id_destroy(tracker_id);
+                               if (ret) {
+                                       goto end;
+                               }
+                       }
+                       if (element_name && !strcmp((const char *) node->name,
+                                                           element_name)) {
+                               xmlChar *content = NULL;
+                               struct lttng_tracker_id *tracker_id = NULL;
+
+                               content = xmlNodeGetContent(node);
+                               if (!content) {
+                                       ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
+                                       goto end;
+                               }
+
+                               tracker_id = lttng_tracker_id_create();
+                               if (tracker_id == NULL) {
+                                       ret = LTTNG_ERR_NOMEM;
+                                       goto end;
+                               }
+
+                               status = lttng_tracker_id_set_string(tracker_id,
+                                               (const char *) content);
+                               if (status != LTTNG_TRACKER_ID_STATUS_OK) {
+                                       lttng_tracker_id_destroy(tracker_id);
+                                       ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
+                                       goto end;
+                               }
+
+                               ret = lttng_track_id(handle, tracker_type,
+                                               tracker_id);
+                               lttng_tracker_id_destroy(tracker_id);
+                               free(content);
                                if (ret) {
                                        goto end;
                                }
                        }
                }
-               node = pid_target_node;
+               node = id_target_node;
        }
 
 end:
@@ -2667,6 +2894,11 @@ int process_domain_node(xmlNodePtr domain_node, const char *session_name)
        xmlNodePtr channels_node = NULL;
        xmlNodePtr trackers_node = NULL;
        xmlNodePtr pid_tracker_node = NULL;
+       xmlNodePtr vpid_tracker_node = NULL;
+       xmlNodePtr uid_tracker_node = NULL;
+       xmlNodePtr vuid_tracker_node = NULL;
+       xmlNodePtr gid_tracker_node = NULL;
+       xmlNodePtr vgid_tracker_node = NULL;
        xmlNodePtr node;
 
        assert(session_name);
@@ -2779,17 +3011,60 @@ int process_domain_node(xmlNodePtr domain_node, const char *session_name)
 
        for (node = xmlFirstElementChild(trackers_node); node;
                        node = xmlNextElementSibling(node)) {
-               if (!strcmp((const char *)node->name,config_element_pid_tracker)) {
+               if (!strcmp((const char *) node->name,
+                                   config_element_pid_tracker)) {
                        pid_tracker_node = node;
-                       ret = process_pid_tracker_node(pid_tracker_node, handle);
+                       ret = process_id_tracker_node(pid_tracker_node, handle,
+                                       LTTNG_TRACKER_PID);
+                       if (ret) {
+                               goto end;
+                       }
+               }
+               if (!strcmp((const char *) node->name,
+                                   config_element_vpid_tracker)) {
+                       vpid_tracker_node = node;
+                       ret = process_id_tracker_node(vpid_tracker_node, handle,
+                                       LTTNG_TRACKER_VPID);
+                       if (ret) {
+                               goto end;
+                       }
+               }
+               if (!strcmp((const char *) node->name,
+                                   config_element_uid_tracker)) {
+                       uid_tracker_node = node;
+                       ret = process_id_tracker_node(uid_tracker_node, handle,
+                                       LTTNG_TRACKER_UID);
+                       if (ret) {
+                               goto end;
+                       }
+               }
+               if (!strcmp((const char *) node->name,
+                                   config_element_vuid_tracker)) {
+                       vuid_tracker_node = node;
+                       ret = process_id_tracker_node(vuid_tracker_node, handle,
+                                       LTTNG_TRACKER_VUID);
+                       if (ret) {
+                               goto end;
+                       }
+               }
+               if (!strcmp((const char *) node->name,
+                                   config_element_gid_tracker)) {
+                       gid_tracker_node = node;
+                       ret = process_id_tracker_node(gid_tracker_node, handle,
+                                       LTTNG_TRACKER_GID);
+                       if (ret) {
+                               goto end;
+                       }
+               }
+               if (!strcmp((const char *) node->name,
+                                   config_element_vgid_tracker)) {
+                       vgid_tracker_node = node;
+                       ret = process_id_tracker_node(vgid_tracker_node, handle,
+                                       LTTNG_TRACKER_VGID);
                        if (ret) {
                                goto end;
                        }
                }
-       }
-
-       if (!pid_tracker_node) {
-               lttng_track_pid(handle, -1);
        }
 
 end:
@@ -3301,6 +3576,7 @@ int load_session_from_file(const char *path, const char *session_name,
 
        sessions_node = xmlDocGetRootElement(doc);
        if (!sessions_node) {
+               ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
                goto end;
        }
 
@@ -3320,6 +3596,9 @@ end:
        if (!ret) {
                ret = session_found ? 0 : -LTTNG_ERR_LOAD_SESSION_NOENT;
        }
+       if (ret == -LTTNG_ERR_NO_SESSION) {
+               ret = -LTTNG_ERR_LOAD_SESSION_NOENT;
+       }
        return ret;
 }
 
@@ -3444,10 +3723,14 @@ int load_session_from_path(const char *path, const char *session_name,
 
                        ret = load_session_from_file(file_path.data, session_name,
                                validation_ctx, overwrite, overrides);
-                       if (session_name && !ret) {
+                       if (session_name &&
+                                       (!ret || ret != -LTTNG_ERR_LOAD_SESSION_NOENT)) {
                                session_found = 1;
                                break;
                        }
+                       if (ret && ret != -LTTNG_ERR_LOAD_SESSION_NOENT) {
+                               goto end;
+                       }
                        /*
                         * Reset the buffer's size to the location of the
                         * path's trailing '/'.
@@ -3459,25 +3742,24 @@ int load_session_from_path(const char *path, const char *session_name,
                                goto end;
                        }
                }
-
        } else {
                ret = load_session_from_file(path, session_name,
                        validation_ctx, overwrite, overrides);
                if (ret) {
                        goto end;
-               } else {
-                       session_found = 1;
                }
+               session_found = 1;
        }
 
+       ret = 0;
 end:
        if (directory) {
                if (closedir(directory)) {
                        PERROR("closedir");
                }
        }
-       if (session_found && !ret) {
-               ret = 0;
+       if (!ret && !session_found) {
+               ret = -LTTNG_ERR_LOAD_SESSION_NOENT;
        }
        lttng_dynamic_buffer_reset(&file_path);
        return ret;
@@ -3550,6 +3832,7 @@ int config_load_session(const char *path, const char *session_name,
                                                DEFAULT_SESSION_CONFIG_AUTOLOAD, home_path);
                                if (ret < 0) {
                                        PERROR("snprintf session autoload home config path");
+                                       ret = -LTTNG_ERR_INVALID;
                                        goto end;
                                }
 
@@ -3567,6 +3850,7 @@ int config_load_session(const char *path, const char *session_name,
                                                DEFAULT_SESSION_HOME_CONFIGPATH, home_path);
                                if (ret < 0) {
                                        PERROR("snprintf session home config path");
+                                       ret = -LTTNG_ERR_INVALID;
                                        goto end;
                                }
                                path_ptr = path;
@@ -3607,6 +3891,8 @@ int config_load_session(const char *path, const char *session_name,
                        if (!ret) {
                                session_loaded = true;
                        }
+               } else {
+                       ret = 0;
                }
        } else {
                ret = access(path, F_OK);
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