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> | |
bfb2ec6a | 12 | #include <lttng/action/rotate-session-internal.h> |
58397d0d | 13 | #include <lttng/action/start-session-internal.h> |
931bdbaa | 14 | #include <lttng/action/stop-session-internal.h> |
a58c490f | 15 | |
2666d352 SM |
16 | static const char *lttng_action_type_string(enum lttng_action_type action_type) |
17 | { | |
18 | switch (action_type) { | |
19 | case LTTNG_ACTION_TYPE_UNKNOWN: | |
20 | return "UNKNOWN"; | |
21 | case LTTNG_ACTION_TYPE_NOTIFY: | |
22 | return "NOTIFY"; | |
bfb2ec6a SM |
23 | case LTTNG_ACTION_TYPE_ROTATE_SESSION: |
24 | return "ROTATE_SESSION"; | |
58397d0d SM |
25 | case LTTNG_ACTION_TYPE_START_SESSION: |
26 | return "START_SESSION"; | |
931bdbaa SM |
27 | case LTTNG_ACTION_TYPE_STOP_SESSION: |
28 | return "STOP_SESSION"; | |
2666d352 SM |
29 | default: |
30 | return "???"; | |
31 | } | |
32 | } | |
33 | ||
a58c490f JG |
34 | enum lttng_action_type lttng_action_get_type(struct lttng_action *action) |
35 | { | |
36 | return action ? action->type : LTTNG_ACTION_TYPE_UNKNOWN; | |
37 | } | |
38 | ||
9b63a4aa JG |
39 | LTTNG_HIDDEN |
40 | enum lttng_action_type lttng_action_get_type_const( | |
41 | const struct lttng_action *action) | |
42 | { | |
43 | return action->type; | |
44 | } | |
45 | ||
6acb3f46 SM |
46 | LTTNG_HIDDEN |
47 | void lttng_action_init( | |
48 | struct lttng_action *action, | |
49 | enum lttng_action_type type, | |
50 | action_validate_cb validate, | |
51 | action_serialize_cb serialize, | |
3dd04a6a | 52 | action_equal_cb equal, |
6acb3f46 SM |
53 | action_destroy_cb destroy) |
54 | { | |
55 | action->type = type; | |
56 | action->validate = validate; | |
57 | action->serialize = serialize; | |
3dd04a6a | 58 | action->equal = equal; |
6acb3f46 SM |
59 | action->destroy = destroy; |
60 | } | |
61 | ||
a58c490f JG |
62 | void lttng_action_destroy(struct lttng_action *action) |
63 | { | |
64 | if (!action) { | |
65 | return; | |
66 | } | |
67 | ||
68 | assert(action->destroy); | |
69 | action->destroy(action); | |
70 | } | |
71 | ||
72 | LTTNG_HIDDEN | |
73 | bool lttng_action_validate(struct lttng_action *action) | |
74 | { | |
75 | bool valid; | |
76 | ||
77 | if (!action) { | |
78 | valid = false; | |
79 | goto end; | |
80 | } | |
81 | ||
82 | if (!action->validate) { | |
83 | /* Sub-class guarantees that it can never be invalid. */ | |
84 | valid = true; | |
85 | goto end; | |
86 | } | |
87 | ||
88 | valid = action->validate(action); | |
89 | end: | |
90 | return valid; | |
91 | } | |
92 | ||
93 | LTTNG_HIDDEN | |
3647288f JG |
94 | int lttng_action_serialize(struct lttng_action *action, |
95 | struct lttng_dynamic_buffer *buf) | |
a58c490f | 96 | { |
3647288f JG |
97 | int ret; |
98 | struct lttng_action_comm action_comm = { | |
99 | .action_type = (int8_t) action->type, | |
100 | }; | |
101 | ||
102 | ret = lttng_dynamic_buffer_append(buf, &action_comm, | |
103 | sizeof(action_comm)); | |
104 | if (ret) { | |
a58c490f JG |
105 | goto end; |
106 | } | |
107 | ||
3647288f JG |
108 | ret = action->serialize(action, buf); |
109 | if (ret) { | |
a58c490f JG |
110 | goto end; |
111 | } | |
a58c490f JG |
112 | end: |
113 | return ret; | |
114 | } | |
115 | ||
116 | LTTNG_HIDDEN | |
117 | ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view, | |
869a3c2d | 118 | struct lttng_action **action) |
a58c490f | 119 | { |
869a3c2d | 120 | ssize_t consumed_len, specific_action_consumed_len; |
a58c490f | 121 | const struct lttng_action_comm *action_comm; |
869a3c2d SM |
122 | action_create_from_buffer_cb create_from_buffer_cb; |
123 | struct lttng_buffer_view specific_action_view; | |
a58c490f | 124 | |
869a3c2d SM |
125 | if (!view || !action) { |
126 | consumed_len = -1; | |
a58c490f JG |
127 | goto end; |
128 | } | |
129 | ||
130 | action_comm = (const struct lttng_action_comm *) view->data; | |
869a3c2d | 131 | |
2666d352 SM |
132 | DBG("Create action from buffer: action-type=%s", |
133 | lttng_action_type_string(action_comm->action_type)); | |
134 | ||
a58c490f JG |
135 | switch (action_comm->action_type) { |
136 | case LTTNG_ACTION_TYPE_NOTIFY: | |
869a3c2d | 137 | create_from_buffer_cb = lttng_action_notify_create_from_buffer; |
a58c490f | 138 | break; |
bfb2ec6a SM |
139 | case LTTNG_ACTION_TYPE_ROTATE_SESSION: |
140 | create_from_buffer_cb = | |
141 | lttng_action_rotate_session_create_from_buffer; | |
142 | break; | |
58397d0d SM |
143 | case LTTNG_ACTION_TYPE_START_SESSION: |
144 | create_from_buffer_cb = | |
145 | lttng_action_start_session_create_from_buffer; | |
146 | break; | |
931bdbaa SM |
147 | case LTTNG_ACTION_TYPE_STOP_SESSION: |
148 | create_from_buffer_cb = | |
149 | lttng_action_stop_session_create_from_buffer; | |
150 | break; | |
a58c490f | 151 | default: |
2666d352 SM |
152 | ERR("Failed to create action from buffer, unhandled action type: action-type=%u (%s)", |
153 | action_comm->action_type, | |
154 | lttng_action_type_string( | |
155 | action_comm->action_type)); | |
869a3c2d | 156 | consumed_len = -1; |
a58c490f JG |
157 | goto end; |
158 | } | |
159 | ||
869a3c2d SM |
160 | /* Create buffer view for the action-type-specific data. */ |
161 | specific_action_view = lttng_buffer_view_from_view(view, | |
162 | sizeof(struct lttng_action_comm), | |
163 | view->size - sizeof(struct lttng_action_comm)); | |
164 | ||
165 | specific_action_consumed_len = | |
166 | create_from_buffer_cb(&specific_action_view, action); | |
167 | if (specific_action_consumed_len < 0) { | |
168 | ERR("Failed to create specific action from buffer."); | |
169 | consumed_len = -1; | |
a58c490f JG |
170 | goto end; |
171 | } | |
869a3c2d SM |
172 | |
173 | assert(*action); | |
174 | ||
175 | consumed_len = sizeof(struct lttng_action_comm) + | |
176 | specific_action_consumed_len; | |
177 | ||
a58c490f | 178 | end: |
869a3c2d | 179 | return consumed_len; |
a58c490f | 180 | } |
3dd04a6a JR |
181 | |
182 | LTTNG_HIDDEN | |
183 | bool lttng_action_is_equal(const struct lttng_action *a, | |
184 | const struct lttng_action *b) | |
185 | { | |
186 | bool is_equal = false; | |
187 | ||
188 | if (!a || !b) { | |
189 | goto end; | |
190 | } | |
191 | ||
192 | if (a->type != b->type) { | |
193 | goto end; | |
194 | } | |
195 | ||
196 | if (a == b) { | |
197 | is_equal = true; | |
198 | goto end; | |
199 | } | |
200 | ||
201 | assert(a->equal); | |
202 | is_equal = a->equal(a, b); | |
203 | end: | |
204 | return is_equal; | |
205 | } |