| 1 | /* |
| 2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License |
| 11 | * for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public License |
| 14 | * along with this library; if not, write to the Free Software Foundation, |
| 15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | #include <lttng/action/action-internal.h> |
| 19 | #include <lttng/action/notify-internal.h> |
| 20 | #include <common/error.h> |
| 21 | #include <assert.h> |
| 22 | |
| 23 | enum lttng_action_type lttng_action_get_type(struct lttng_action *action) |
| 24 | { |
| 25 | return action ? action->type : LTTNG_ACTION_TYPE_UNKNOWN; |
| 26 | } |
| 27 | |
| 28 | void lttng_action_destroy(struct lttng_action *action) |
| 29 | { |
| 30 | if (!action) { |
| 31 | return; |
| 32 | } |
| 33 | |
| 34 | assert(action->destroy); |
| 35 | action->destroy(action); |
| 36 | } |
| 37 | |
| 38 | LTTNG_HIDDEN |
| 39 | bool lttng_action_validate(struct lttng_action *action) |
| 40 | { |
| 41 | bool valid; |
| 42 | |
| 43 | if (!action) { |
| 44 | valid = false; |
| 45 | goto end; |
| 46 | } |
| 47 | |
| 48 | if (!action->validate) { |
| 49 | /* Sub-class guarantees that it can never be invalid. */ |
| 50 | valid = true; |
| 51 | goto end; |
| 52 | } |
| 53 | |
| 54 | valid = action->validate(action); |
| 55 | end: |
| 56 | return valid; |
| 57 | } |
| 58 | |
| 59 | LTTNG_HIDDEN |
| 60 | ssize_t lttng_action_serialize(struct lttng_action *action, char *buf) |
| 61 | { |
| 62 | ssize_t ret, action_size; |
| 63 | struct lttng_action_comm action_comm; |
| 64 | |
| 65 | if (!action) { |
| 66 | ret = -1; |
| 67 | goto end; |
| 68 | } |
| 69 | |
| 70 | action_comm.action_type = (int8_t) action->type; |
| 71 | ret = sizeof(struct lttng_action_comm); |
| 72 | if (buf) { |
| 73 | memcpy(buf, &action_comm, ret); |
| 74 | buf += ret; |
| 75 | } |
| 76 | |
| 77 | action_size = action->serialize(action, buf); |
| 78 | if (action_size < 0) { |
| 79 | ret = action_size; |
| 80 | goto end; |
| 81 | } |
| 82 | ret += action_size; |
| 83 | end: |
| 84 | return ret; |
| 85 | } |
| 86 | |
| 87 | LTTNG_HIDDEN |
| 88 | ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view, |
| 89 | struct lttng_action **_action) |
| 90 | { |
| 91 | ssize_t ret, action_size = sizeof(struct lttng_action_comm); |
| 92 | struct lttng_action *action; |
| 93 | const struct lttng_action_comm *action_comm; |
| 94 | |
| 95 | if (!view || !_action) { |
| 96 | ret = -1; |
| 97 | goto end; |
| 98 | } |
| 99 | |
| 100 | action_comm = (const struct lttng_action_comm *) view->data; |
| 101 | DBG("Deserializing action from buffer"); |
| 102 | switch (action_comm->action_type) { |
| 103 | case LTTNG_ACTION_TYPE_NOTIFY: |
| 104 | action = lttng_action_notify_create(); |
| 105 | break; |
| 106 | default: |
| 107 | ret = -1; |
| 108 | goto end; |
| 109 | } |
| 110 | |
| 111 | if (!action) { |
| 112 | ret = -1; |
| 113 | goto end; |
| 114 | } |
| 115 | ret = action_size; |
| 116 | *_action = action; |
| 117 | end: |
| 118 | return ret; |
| 119 | } |