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 | ||
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, | |
43 | action_destroy_cb destroy) | |
44 | { | |
45 | action->type = type; | |
46 | action->validate = validate; | |
47 | action->serialize = serialize; | |
48 | action->destroy = destroy; | |
49 | } | |
50 | ||
a58c490f JG |
51 | void lttng_action_destroy(struct lttng_action *action) |
52 | { | |
53 | if (!action) { | |
54 | return; | |
55 | } | |
56 | ||
57 | assert(action->destroy); | |
58 | action->destroy(action); | |
59 | } | |
60 | ||
61 | LTTNG_HIDDEN | |
62 | bool lttng_action_validate(struct lttng_action *action) | |
63 | { | |
64 | bool valid; | |
65 | ||
66 | if (!action) { | |
67 | valid = false; | |
68 | goto end; | |
69 | } | |
70 | ||
71 | if (!action->validate) { | |
72 | /* Sub-class guarantees that it can never be invalid. */ | |
73 | valid = true; | |
74 | goto end; | |
75 | } | |
76 | ||
77 | valid = action->validate(action); | |
78 | end: | |
79 | return valid; | |
80 | } | |
81 | ||
82 | LTTNG_HIDDEN | |
3647288f JG |
83 | int lttng_action_serialize(struct lttng_action *action, |
84 | struct lttng_dynamic_buffer *buf) | |
a58c490f | 85 | { |
3647288f JG |
86 | int ret; |
87 | struct lttng_action_comm action_comm = { | |
88 | .action_type = (int8_t) action->type, | |
89 | }; | |
90 | ||
91 | ret = lttng_dynamic_buffer_append(buf, &action_comm, | |
92 | sizeof(action_comm)); | |
93 | if (ret) { | |
a58c490f JG |
94 | goto end; |
95 | } | |
96 | ||
3647288f JG |
97 | ret = action->serialize(action, buf); |
98 | if (ret) { | |
a58c490f JG |
99 | goto end; |
100 | } | |
a58c490f JG |
101 | end: |
102 | return ret; | |
103 | } | |
104 | ||
105 | LTTNG_HIDDEN | |
106 | ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view, | |
869a3c2d | 107 | struct lttng_action **action) |
a58c490f | 108 | { |
869a3c2d | 109 | ssize_t consumed_len, specific_action_consumed_len; |
a58c490f | 110 | const struct lttng_action_comm *action_comm; |
869a3c2d SM |
111 | action_create_from_buffer_cb create_from_buffer_cb; |
112 | struct lttng_buffer_view specific_action_view; | |
a58c490f | 113 | |
869a3c2d SM |
114 | if (!view || !action) { |
115 | consumed_len = -1; | |
a58c490f JG |
116 | goto end; |
117 | } | |
118 | ||
119 | action_comm = (const struct lttng_action_comm *) view->data; | |
869a3c2d | 120 | |
2666d352 SM |
121 | DBG("Create action from buffer: action-type=%s", |
122 | lttng_action_type_string(action_comm->action_type)); | |
123 | ||
a58c490f JG |
124 | switch (action_comm->action_type) { |
125 | case LTTNG_ACTION_TYPE_NOTIFY: | |
869a3c2d | 126 | create_from_buffer_cb = lttng_action_notify_create_from_buffer; |
a58c490f JG |
127 | break; |
128 | default: | |
2666d352 SM |
129 | ERR("Failed to create action from buffer, unhandled action type: action-type=%u (%s)", |
130 | action_comm->action_type, | |
131 | lttng_action_type_string( | |
132 | action_comm->action_type)); | |
869a3c2d | 133 | consumed_len = -1; |
a58c490f JG |
134 | goto end; |
135 | } | |
136 | ||
869a3c2d SM |
137 | /* Create buffer view for the action-type-specific data. */ |
138 | specific_action_view = lttng_buffer_view_from_view(view, | |
139 | sizeof(struct lttng_action_comm), | |
140 | view->size - sizeof(struct lttng_action_comm)); | |
141 | ||
142 | specific_action_consumed_len = | |
143 | create_from_buffer_cb(&specific_action_view, action); | |
144 | if (specific_action_consumed_len < 0) { | |
145 | ERR("Failed to create specific action from buffer."); | |
146 | consumed_len = -1; | |
a58c490f JG |
147 | goto end; |
148 | } | |
869a3c2d SM |
149 | |
150 | assert(*action); | |
151 | ||
152 | consumed_len = sizeof(struct lttng_action_comm) + | |
153 | specific_action_consumed_len; | |
154 | ||
a58c490f | 155 | end: |
869a3c2d | 156 | return consumed_len; |
a58c490f | 157 | } |