Commit | Line | Data |
---|---|---|
a58c490f | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
a58c490f | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: LGPL-2.1-only |
a58c490f | 5 | * |
a58c490f JG |
6 | */ |
7 | ||
8 | #include <lttng/action/action-internal.h> | |
9 | #include <lttng/action/notify-internal.h> | |
10 | #include <common/error.h> | |
11 | #include <assert.h> | |
12 | ||
13 | enum lttng_action_type lttng_action_get_type(struct lttng_action *action) | |
14 | { | |
15 | return action ? action->type : LTTNG_ACTION_TYPE_UNKNOWN; | |
16 | } | |
17 | ||
9b63a4aa JG |
18 | LTTNG_HIDDEN |
19 | enum lttng_action_type lttng_action_get_type_const( | |
20 | const struct lttng_action *action) | |
21 | { | |
22 | return action->type; | |
23 | } | |
24 | ||
6acb3f46 SM |
25 | LTTNG_HIDDEN |
26 | void lttng_action_init( | |
27 | struct lttng_action *action, | |
28 | enum lttng_action_type type, | |
29 | action_validate_cb validate, | |
30 | action_serialize_cb serialize, | |
31 | action_destroy_cb destroy) | |
32 | { | |
33 | action->type = type; | |
34 | action->validate = validate; | |
35 | action->serialize = serialize; | |
36 | action->destroy = destroy; | |
37 | } | |
38 | ||
a58c490f JG |
39 | void lttng_action_destroy(struct lttng_action *action) |
40 | { | |
41 | if (!action) { | |
42 | return; | |
43 | } | |
44 | ||
45 | assert(action->destroy); | |
46 | action->destroy(action); | |
47 | } | |
48 | ||
49 | LTTNG_HIDDEN | |
50 | bool lttng_action_validate(struct lttng_action *action) | |
51 | { | |
52 | bool valid; | |
53 | ||
54 | if (!action) { | |
55 | valid = false; | |
56 | goto end; | |
57 | } | |
58 | ||
59 | if (!action->validate) { | |
60 | /* Sub-class guarantees that it can never be invalid. */ | |
61 | valid = true; | |
62 | goto end; | |
63 | } | |
64 | ||
65 | valid = action->validate(action); | |
66 | end: | |
67 | return valid; | |
68 | } | |
69 | ||
70 | LTTNG_HIDDEN | |
3647288f JG |
71 | int lttng_action_serialize(struct lttng_action *action, |
72 | struct lttng_dynamic_buffer *buf) | |
a58c490f | 73 | { |
3647288f JG |
74 | int ret; |
75 | struct lttng_action_comm action_comm = { | |
76 | .action_type = (int8_t) action->type, | |
77 | }; | |
78 | ||
79 | ret = lttng_dynamic_buffer_append(buf, &action_comm, | |
80 | sizeof(action_comm)); | |
81 | if (ret) { | |
a58c490f JG |
82 | goto end; |
83 | } | |
84 | ||
3647288f JG |
85 | ret = action->serialize(action, buf); |
86 | if (ret) { | |
a58c490f JG |
87 | goto end; |
88 | } | |
a58c490f JG |
89 | end: |
90 | return ret; | |
91 | } | |
92 | ||
93 | LTTNG_HIDDEN | |
94 | ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view, | |
869a3c2d | 95 | struct lttng_action **action) |
a58c490f | 96 | { |
869a3c2d | 97 | ssize_t consumed_len, specific_action_consumed_len; |
a58c490f | 98 | const struct lttng_action_comm *action_comm; |
869a3c2d SM |
99 | action_create_from_buffer_cb create_from_buffer_cb; |
100 | struct lttng_buffer_view specific_action_view; | |
a58c490f | 101 | |
869a3c2d SM |
102 | if (!view || !action) { |
103 | consumed_len = -1; | |
a58c490f JG |
104 | goto end; |
105 | } | |
106 | ||
107 | action_comm = (const struct lttng_action_comm *) view->data; | |
869a3c2d | 108 | |
a58c490f JG |
109 | DBG("Deserializing action from buffer"); |
110 | switch (action_comm->action_type) { | |
111 | case LTTNG_ACTION_TYPE_NOTIFY: | |
869a3c2d | 112 | create_from_buffer_cb = lttng_action_notify_create_from_buffer; |
a58c490f JG |
113 | break; |
114 | default: | |
869a3c2d | 115 | consumed_len = -1; |
a58c490f JG |
116 | goto end; |
117 | } | |
118 | ||
869a3c2d SM |
119 | /* Create buffer view for the action-type-specific data. */ |
120 | specific_action_view = lttng_buffer_view_from_view(view, | |
121 | sizeof(struct lttng_action_comm), | |
122 | view->size - sizeof(struct lttng_action_comm)); | |
123 | ||
124 | specific_action_consumed_len = | |
125 | create_from_buffer_cb(&specific_action_view, action); | |
126 | if (specific_action_consumed_len < 0) { | |
127 | ERR("Failed to create specific action from buffer."); | |
128 | consumed_len = -1; | |
a58c490f JG |
129 | goto end; |
130 | } | |
869a3c2d SM |
131 | |
132 | assert(*action); | |
133 | ||
134 | consumed_len = sizeof(struct lttng_action_comm) + | |
135 | specific_action_consumed_len; | |
136 | ||
a58c490f | 137 | end: |
869a3c2d | 138 | return consumed_len; |
a58c490f | 139 | } |