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 | ||
14ec7e87 JR |
8 | #include <assert.h> |
9 | #include <common/error.h> | |
a58c490f JG |
10 | #include <lttng/action/action-internal.h> |
11 | #include <lttng/action/notify-internal.h> | |
a58c490f | 12 | |
2666d352 SM |
13 | static const char *lttng_action_type_string(enum lttng_action_type action_type) |
14 | { | |
15 | switch (action_type) { | |
16 | case LTTNG_ACTION_TYPE_UNKNOWN: | |
17 | return "UNKNOWN"; | |
18 | case LTTNG_ACTION_TYPE_NOTIFY: | |
19 | return "NOTIFY"; | |
20 | default: | |
21 | return "???"; | |
22 | } | |
23 | } | |
24 | ||
a58c490f JG |
25 | enum lttng_action_type lttng_action_get_type(struct lttng_action *action) |
26 | { | |
27 | return action ? action->type : LTTNG_ACTION_TYPE_UNKNOWN; | |
28 | } | |
29 | ||
9b63a4aa JG |
30 | LTTNG_HIDDEN |
31 | enum lttng_action_type lttng_action_get_type_const( | |
32 | const struct lttng_action *action) | |
33 | { | |
34 | return action->type; | |
35 | } | |
36 | ||
6acb3f46 SM |
37 | LTTNG_HIDDEN |
38 | void lttng_action_init( | |
39 | struct lttng_action *action, | |
40 | enum lttng_action_type type, | |
41 | action_validate_cb validate, | |
42 | action_serialize_cb serialize, | |
3dd04a6a | 43 | action_equal_cb equal, |
6acb3f46 SM |
44 | action_destroy_cb destroy) |
45 | { | |
46 | action->type = type; | |
47 | action->validate = validate; | |
48 | action->serialize = serialize; | |
3dd04a6a | 49 | action->equal = equal; |
6acb3f46 SM |
50 | action->destroy = destroy; |
51 | } | |
52 | ||
a58c490f JG |
53 | void lttng_action_destroy(struct lttng_action *action) |
54 | { | |
55 | if (!action) { | |
56 | return; | |
57 | } | |
58 | ||
59 | assert(action->destroy); | |
60 | action->destroy(action); | |
61 | } | |
62 | ||
63 | LTTNG_HIDDEN | |
64 | bool lttng_action_validate(struct lttng_action *action) | |
65 | { | |
66 | bool valid; | |
67 | ||
68 | if (!action) { | |
69 | valid = false; | |
70 | goto end; | |
71 | } | |
72 | ||
73 | if (!action->validate) { | |
74 | /* Sub-class guarantees that it can never be invalid. */ | |
75 | valid = true; | |
76 | goto end; | |
77 | } | |
78 | ||
79 | valid = action->validate(action); | |
80 | end: | |
81 | return valid; | |
82 | } | |
83 | ||
84 | LTTNG_HIDDEN | |
3647288f JG |
85 | int lttng_action_serialize(struct lttng_action *action, |
86 | struct lttng_dynamic_buffer *buf) | |
a58c490f | 87 | { |
3647288f JG |
88 | int ret; |
89 | struct lttng_action_comm action_comm = { | |
90 | .action_type = (int8_t) action->type, | |
91 | }; | |
92 | ||
93 | ret = lttng_dynamic_buffer_append(buf, &action_comm, | |
94 | sizeof(action_comm)); | |
95 | if (ret) { | |
a58c490f JG |
96 | goto end; |
97 | } | |
98 | ||
3647288f JG |
99 | ret = action->serialize(action, buf); |
100 | if (ret) { | |
a58c490f JG |
101 | goto end; |
102 | } | |
a58c490f JG |
103 | end: |
104 | return ret; | |
105 | } | |
106 | ||
107 | LTTNG_HIDDEN | |
108 | ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view, | |
869a3c2d | 109 | struct lttng_action **action) |
a58c490f | 110 | { |
869a3c2d | 111 | ssize_t consumed_len, specific_action_consumed_len; |
a58c490f | 112 | const struct lttng_action_comm *action_comm; |
869a3c2d SM |
113 | action_create_from_buffer_cb create_from_buffer_cb; |
114 | struct lttng_buffer_view specific_action_view; | |
a58c490f | 115 | |
869a3c2d SM |
116 | if (!view || !action) { |
117 | consumed_len = -1; | |
a58c490f JG |
118 | goto end; |
119 | } | |
120 | ||
121 | action_comm = (const struct lttng_action_comm *) view->data; | |
869a3c2d | 122 | |
2666d352 SM |
123 | DBG("Create action from buffer: action-type=%s", |
124 | lttng_action_type_string(action_comm->action_type)); | |
125 | ||
a58c490f JG |
126 | switch (action_comm->action_type) { |
127 | case LTTNG_ACTION_TYPE_NOTIFY: | |
869a3c2d | 128 | create_from_buffer_cb = lttng_action_notify_create_from_buffer; |
a58c490f JG |
129 | break; |
130 | default: | |
2666d352 SM |
131 | ERR("Failed to create action from buffer, unhandled action type: action-type=%u (%s)", |
132 | action_comm->action_type, | |
133 | lttng_action_type_string( | |
134 | action_comm->action_type)); | |
869a3c2d | 135 | consumed_len = -1; |
a58c490f JG |
136 | goto end; |
137 | } | |
138 | ||
869a3c2d SM |
139 | /* Create buffer view for the action-type-specific data. */ |
140 | specific_action_view = lttng_buffer_view_from_view(view, | |
141 | sizeof(struct lttng_action_comm), | |
142 | view->size - sizeof(struct lttng_action_comm)); | |
143 | ||
144 | specific_action_consumed_len = | |
145 | create_from_buffer_cb(&specific_action_view, action); | |
146 | if (specific_action_consumed_len < 0) { | |
147 | ERR("Failed to create specific action from buffer."); | |
148 | consumed_len = -1; | |
a58c490f JG |
149 | goto end; |
150 | } | |
869a3c2d SM |
151 | |
152 | assert(*action); | |
153 | ||
154 | consumed_len = sizeof(struct lttng_action_comm) + | |
155 | specific_action_consumed_len; | |
156 | ||
a58c490f | 157 | end: |
869a3c2d | 158 | return consumed_len; |
a58c490f | 159 | } |
3dd04a6a JR |
160 | |
161 | LTTNG_HIDDEN | |
162 | bool lttng_action_is_equal(const struct lttng_action *a, | |
163 | const struct lttng_action *b) | |
164 | { | |
165 | bool is_equal = false; | |
166 | ||
167 | if (!a || !b) { | |
168 | goto end; | |
169 | } | |
170 | ||
171 | if (a->type != b->type) { | |
172 | goto end; | |
173 | } | |
174 | ||
175 | if (a == b) { | |
176 | is_equal = true; | |
177 | goto end; | |
178 | } | |
179 | ||
180 | assert(a->equal); | |
181 | is_equal = a->equal(a, b); | |
182 | end: | |
183 | return is_equal; | |
184 | } |