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> | |
58397d0d | 12 | #include <lttng/action/start-session-internal.h> |
a58c490f | 13 | |
2666d352 SM |
14 | static const char *lttng_action_type_string(enum lttng_action_type action_type) |
15 | { | |
16 | switch (action_type) { | |
17 | case LTTNG_ACTION_TYPE_UNKNOWN: | |
18 | return "UNKNOWN"; | |
19 | case LTTNG_ACTION_TYPE_NOTIFY: | |
20 | return "NOTIFY"; | |
58397d0d SM |
21 | case LTTNG_ACTION_TYPE_START_SESSION: |
22 | return "START_SESSION"; | |
2666d352 SM |
23 | default: |
24 | return "???"; | |
25 | } | |
26 | } | |
27 | ||
a58c490f JG |
28 | enum lttng_action_type lttng_action_get_type(struct lttng_action *action) |
29 | { | |
30 | return action ? action->type : LTTNG_ACTION_TYPE_UNKNOWN; | |
31 | } | |
32 | ||
9b63a4aa JG |
33 | LTTNG_HIDDEN |
34 | enum lttng_action_type lttng_action_get_type_const( | |
35 | const struct lttng_action *action) | |
36 | { | |
37 | return action->type; | |
38 | } | |
39 | ||
6acb3f46 SM |
40 | LTTNG_HIDDEN |
41 | void lttng_action_init( | |
42 | struct lttng_action *action, | |
43 | enum lttng_action_type type, | |
44 | action_validate_cb validate, | |
45 | action_serialize_cb serialize, | |
3dd04a6a | 46 | action_equal_cb equal, |
6acb3f46 SM |
47 | action_destroy_cb destroy) |
48 | { | |
49 | action->type = type; | |
50 | action->validate = validate; | |
51 | action->serialize = serialize; | |
3dd04a6a | 52 | action->equal = equal; |
6acb3f46 SM |
53 | action->destroy = destroy; |
54 | } | |
55 | ||
a58c490f JG |
56 | void lttng_action_destroy(struct lttng_action *action) |
57 | { | |
58 | if (!action) { | |
59 | return; | |
60 | } | |
61 | ||
62 | assert(action->destroy); | |
63 | action->destroy(action); | |
64 | } | |
65 | ||
66 | LTTNG_HIDDEN | |
67 | bool lttng_action_validate(struct lttng_action *action) | |
68 | { | |
69 | bool valid; | |
70 | ||
71 | if (!action) { | |
72 | valid = false; | |
73 | goto end; | |
74 | } | |
75 | ||
76 | if (!action->validate) { | |
77 | /* Sub-class guarantees that it can never be invalid. */ | |
78 | valid = true; | |
79 | goto end; | |
80 | } | |
81 | ||
82 | valid = action->validate(action); | |
83 | end: | |
84 | return valid; | |
85 | } | |
86 | ||
87 | LTTNG_HIDDEN | |
3647288f JG |
88 | int lttng_action_serialize(struct lttng_action *action, |
89 | struct lttng_dynamic_buffer *buf) | |
a58c490f | 90 | { |
3647288f JG |
91 | int ret; |
92 | struct lttng_action_comm action_comm = { | |
93 | .action_type = (int8_t) action->type, | |
94 | }; | |
95 | ||
96 | ret = lttng_dynamic_buffer_append(buf, &action_comm, | |
97 | sizeof(action_comm)); | |
98 | if (ret) { | |
a58c490f JG |
99 | goto end; |
100 | } | |
101 | ||
3647288f JG |
102 | ret = action->serialize(action, buf); |
103 | if (ret) { | |
a58c490f JG |
104 | goto end; |
105 | } | |
a58c490f JG |
106 | end: |
107 | return ret; | |
108 | } | |
109 | ||
110 | LTTNG_HIDDEN | |
111 | ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view, | |
869a3c2d | 112 | struct lttng_action **action) |
a58c490f | 113 | { |
869a3c2d | 114 | ssize_t consumed_len, specific_action_consumed_len; |
a58c490f | 115 | const struct lttng_action_comm *action_comm; |
869a3c2d SM |
116 | action_create_from_buffer_cb create_from_buffer_cb; |
117 | struct lttng_buffer_view specific_action_view; | |
a58c490f | 118 | |
869a3c2d SM |
119 | if (!view || !action) { |
120 | consumed_len = -1; | |
a58c490f JG |
121 | goto end; |
122 | } | |
123 | ||
124 | action_comm = (const struct lttng_action_comm *) view->data; | |
869a3c2d | 125 | |
2666d352 SM |
126 | DBG("Create action from buffer: action-type=%s", |
127 | lttng_action_type_string(action_comm->action_type)); | |
128 | ||
a58c490f JG |
129 | switch (action_comm->action_type) { |
130 | case LTTNG_ACTION_TYPE_NOTIFY: | |
869a3c2d | 131 | create_from_buffer_cb = lttng_action_notify_create_from_buffer; |
a58c490f | 132 | break; |
58397d0d SM |
133 | case LTTNG_ACTION_TYPE_START_SESSION: |
134 | create_from_buffer_cb = | |
135 | lttng_action_start_session_create_from_buffer; | |
136 | break; | |
a58c490f | 137 | default: |
2666d352 SM |
138 | ERR("Failed to create action from buffer, unhandled action type: action-type=%u (%s)", |
139 | action_comm->action_type, | |
140 | lttng_action_type_string( | |
141 | action_comm->action_type)); | |
869a3c2d | 142 | consumed_len = -1; |
a58c490f JG |
143 | goto end; |
144 | } | |
145 | ||
869a3c2d SM |
146 | /* Create buffer view for the action-type-specific data. */ |
147 | specific_action_view = lttng_buffer_view_from_view(view, | |
148 | sizeof(struct lttng_action_comm), | |
149 | view->size - sizeof(struct lttng_action_comm)); | |
150 | ||
151 | specific_action_consumed_len = | |
152 | create_from_buffer_cb(&specific_action_view, action); | |
153 | if (specific_action_consumed_len < 0) { | |
154 | ERR("Failed to create specific action from buffer."); | |
155 | consumed_len = -1; | |
a58c490f JG |
156 | goto end; |
157 | } | |
869a3c2d SM |
158 | |
159 | assert(*action); | |
160 | ||
161 | consumed_len = sizeof(struct lttng_action_comm) + | |
162 | specific_action_consumed_len; | |
163 | ||
a58c490f | 164 | end: |
869a3c2d | 165 | return consumed_len; |
a58c490f | 166 | } |
3dd04a6a JR |
167 | |
168 | LTTNG_HIDDEN | |
169 | bool lttng_action_is_equal(const struct lttng_action *a, | |
170 | const struct lttng_action *b) | |
171 | { | |
172 | bool is_equal = false; | |
173 | ||
174 | if (!a || !b) { | |
175 | goto end; | |
176 | } | |
177 | ||
178 | if (a->type != b->type) { | |
179 | goto end; | |
180 | } | |
181 | ||
182 | if (a == b) { | |
183 | is_equal = true; | |
184 | goto end; | |
185 | } | |
186 | ||
187 | assert(a->equal); | |
188 | is_equal = a->equal(a, b); | |
189 | end: | |
190 | return is_equal; | |
191 | } |