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668ba131 JG |
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/trigger/trigger-internal.h> | |
2a38b722 JG |
19 | #include <lttng/condition/condition-internal.h> |
20 | #include <lttng/action/action-internal.h> | |
45fdf591 | 21 | #include <common/error.h> |
668ba131 JG |
22 | #include <assert.h> |
23 | ||
96f8e9b0 JG |
24 | LTTNG_HIDDEN |
25 | bool lttng_trigger_validate(struct lttng_trigger *trigger) | |
26 | { | |
27 | bool valid; | |
28 | ||
29 | if (!trigger) { | |
30 | valid = false; | |
31 | goto end; | |
32 | } | |
33 | ||
34 | valid = lttng_condition_validate(trigger->condition) && | |
35 | lttng_action_validate(trigger->action); | |
36 | end: | |
37 | return valid; | |
38 | } | |
39 | ||
668ba131 JG |
40 | struct lttng_trigger *lttng_trigger_create( |
41 | struct lttng_condition *condition, | |
42 | struct lttng_action *action) | |
43 | { | |
44 | struct lttng_trigger *trigger = NULL; | |
45 | ||
46 | if (!condition || !action) { | |
47 | goto end; | |
48 | } | |
49 | ||
50 | trigger = zmalloc(sizeof(struct lttng_trigger)); | |
51 | if (!trigger) { | |
52 | goto end; | |
53 | } | |
54 | ||
55 | trigger->condition = condition; | |
56 | trigger->action = action; | |
c254fb11 | 57 | CDS_INIT_LIST_HEAD(&trigger->list_node); |
668ba131 JG |
58 | end: |
59 | return trigger; | |
60 | } | |
61 | ||
3c47cdaf JG |
62 | struct lttng_condition *lttng_trigger_get_condition( |
63 | struct lttng_trigger *trigger) | |
64 | { | |
65 | return trigger ? trigger->condition : NULL; | |
66 | } | |
67 | ||
68 | extern struct lttng_action *lttng_trigger_get_action( | |
69 | struct lttng_trigger *trigger) | |
70 | { | |
71 | return trigger ? trigger->action : NULL; | |
72 | } | |
73 | ||
668ba131 JG |
74 | void lttng_trigger_destroy(struct lttng_trigger *trigger) |
75 | { | |
76 | if (!trigger) { | |
77 | return; | |
78 | } | |
79 | ||
80 | lttng_condition_destroy(trigger->condition); | |
81 | lttng_action_destroy(trigger->action); | |
82 | free(trigger); | |
83 | } | |
2a38b722 | 84 | |
96f8e9b0 JG |
85 | LTTNG_HIDDEN |
86 | ssize_t lttng_trigger_create_from_buffer(const char *buf, | |
87 | struct lttng_trigger **trigger) | |
88 | { | |
3c47cdaf | 89 | ssize_t ret, offset = 0, condition_size, action_size; |
96f8e9b0 JG |
90 | struct lttng_condition *condition = NULL; |
91 | struct lttng_action *action = NULL; | |
3c47cdaf | 92 | struct lttng_trigger_comm *trigger_comm; |
96f8e9b0 JG |
93 | |
94 | if (!buf || !trigger) { | |
95 | ret = -1; | |
96 | goto end; | |
97 | } | |
98 | ||
3c47cdaf JG |
99 | /* lttng_trigger_comm header */ |
100 | trigger_comm = (struct lttng_trigger_comm *) buf; | |
101 | offset += sizeof(*trigger_comm); | |
102 | ||
103 | /* struct lttng_condition */ | |
104 | condition_size = lttng_condition_create_from_buffer(buf + offset, | |
105 | &condition); | |
106 | if (condition_size < 0) { | |
107 | ret = condition_size; | |
96f8e9b0 JG |
108 | goto end; |
109 | } | |
3c47cdaf | 110 | offset += condition_size; |
96f8e9b0 | 111 | |
3c47cdaf JG |
112 | /* struct lttng_action */ |
113 | action_size = lttng_action_create_from_buffer(buf + offset, &action); | |
114 | if (action_size < 0) { | |
115 | ret = action_size; | |
96f8e9b0 JG |
116 | goto end; |
117 | } | |
3c47cdaf JG |
118 | offset += action_size; |
119 | ||
120 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
121 | if ((ssize_t) trigger_comm->length != condition_size + action_size) { | |
122 | ret = -1; | |
123 | goto error; | |
124 | } | |
96f8e9b0 | 125 | |
96f8e9b0 JG |
126 | *trigger = lttng_trigger_create(condition, action); |
127 | if (!*trigger) { | |
128 | goto error; | |
129 | } | |
3c47cdaf | 130 | ret = offset; |
96f8e9b0 JG |
131 | end: |
132 | return ret; | |
133 | error: | |
134 | lttng_condition_destroy(condition); | |
135 | lttng_action_destroy(action); | |
136 | return ret; | |
137 | } | |
138 | ||
139 | /* | |
3c47cdaf | 140 | * Returns the size of a trigger (header + condition + action). |
96f8e9b0 JG |
141 | * Both elements are stored contiguously, see their "*_comm" structure |
142 | * for the detailed format. | |
143 | */ | |
144 | LTTNG_HIDDEN | |
2a38b722 JG |
145 | ssize_t lttng_trigger_serialize(struct lttng_trigger *trigger, char *buf) |
146 | { | |
3c47cdaf JG |
147 | struct lttng_trigger_comm trigger_comm; |
148 | ssize_t action_size, condition_size, offset = 0, ret; | |
2a38b722 JG |
149 | |
150 | if (!trigger) { | |
151 | ret = -1; | |
152 | goto end; | |
153 | } | |
154 | ||
3c47cdaf JG |
155 | offset += sizeof(trigger_comm); |
156 | condition_size = lttng_condition_serialize(trigger->condition, | |
157 | buf ? (buf + offset) : NULL); | |
96f8e9b0 JG |
158 | if (condition_size < 0) { |
159 | ret = -1; | |
160 | goto end; | |
161 | } | |
3c47cdaf | 162 | offset += condition_size; |
96f8e9b0 | 163 | |
3c47cdaf JG |
164 | action_size = lttng_action_serialize(trigger->action, |
165 | buf ? (buf + offset) : NULL); | |
96f8e9b0 JG |
166 | if (action_size < 0) { |
167 | ret = -1; | |
168 | goto end; | |
169 | } | |
3c47cdaf | 170 | offset += action_size; |
96f8e9b0 | 171 | |
3c47cdaf JG |
172 | if (buf) { |
173 | trigger_comm.length = (uint32_t) (condition_size + action_size); | |
174 | memcpy(buf, &trigger_comm, sizeof(trigger_comm)); | |
2a38b722 | 175 | } |
3c47cdaf | 176 | ret = offset; |
2a38b722 JG |
177 | end: |
178 | return ret; | |
179 | } |