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/notification/notification-internal.h> | |
9 | #include <lttng/condition/condition-internal.h> | |
10 | #include <lttng/condition/evaluation-internal.h> | |
11 | #include <lttng/condition/condition.h> | |
12 | #include <lttng/condition/evaluation.h> | |
9e620ea7 JG |
13 | #include <common/payload.h> |
14 | #include <common/payload-view.h> | |
a58c490f JG |
15 | #include <assert.h> |
16 | ||
17 | LTTNG_HIDDEN | |
18 | struct lttng_notification *lttng_notification_create( | |
19 | struct lttng_condition *condition, | |
20 | struct lttng_evaluation *evaluation) | |
21 | { | |
22 | struct lttng_notification *notification = NULL; | |
23 | ||
24 | if (!condition || !evaluation) { | |
25 | goto end; | |
26 | } | |
27 | ||
28 | notification = zmalloc(sizeof(struct lttng_notification)); | |
29 | if (!notification) { | |
30 | goto end; | |
31 | } | |
32 | ||
33 | notification->condition = condition; | |
34 | notification->evaluation = evaluation; | |
a58c490f JG |
35 | end: |
36 | return notification; | |
37 | } | |
38 | ||
39 | LTTNG_HIDDEN | |
9b63a4aa | 40 | int lttng_notification_serialize(const struct lttng_notification *notification, |
c0a66c84 | 41 | struct lttng_payload *payload) |
a58c490f | 42 | { |
3647288f JG |
43 | int ret; |
44 | size_t header_offset, size_before_payload; | |
1e9e2705 | 45 | struct lttng_notification_comm notification_comm = { 0 }; |
3647288f | 46 | struct lttng_notification_comm *header; |
a58c490f | 47 | |
c0a66c84 JG |
48 | header_offset = payload->buffer.size; |
49 | ret = lttng_dynamic_buffer_append(&payload->buffer, ¬ification_comm, | |
3647288f | 50 | sizeof(notification_comm)); |
28cff59f JG |
51 | if (ret) { |
52 | goto end; | |
53 | } | |
a58c490f | 54 | |
c0a66c84 | 55 | size_before_payload = payload->buffer.size; |
3647288f | 56 | ret = lttng_condition_serialize(notification->condition, |
c0a66c84 | 57 | payload); |
3647288f | 58 | if (ret) { |
a58c490f JG |
59 | goto end; |
60 | } | |
a58c490f | 61 | |
c0a66c84 | 62 | ret = lttng_evaluation_serialize(notification->evaluation, payload); |
3647288f | 63 | if (ret) { |
a58c490f JG |
64 | goto end; |
65 | } | |
a58c490f | 66 | |
3647288f | 67 | /* Update payload size. */ |
c0a66c84 JG |
68 | header = (typeof(header)) (payload->buffer.data + header_offset); |
69 | header->length = (uint32_t) (payload->buffer.size - size_before_payload); | |
a58c490f JG |
70 | end: |
71 | return ret; | |
72 | ||
73 | } | |
74 | ||
75 | LTTNG_HIDDEN | |
c0a66c84 JG |
76 | ssize_t lttng_notification_create_from_payload( |
77 | struct lttng_payload_view *src_view, | |
a58c490f JG |
78 | struct lttng_notification **notification) |
79 | { | |
80 | ssize_t ret, notification_size = 0, condition_size, evaluation_size; | |
a58c490f JG |
81 | struct lttng_condition *condition; |
82 | struct lttng_evaluation *evaluation; | |
3e6e0df2 JG |
83 | const struct lttng_notification_comm *notification_comm; |
84 | const struct lttng_payload_view notification_comm_view = | |
85 | lttng_payload_view_from_view( | |
86 | src_view, 0, sizeof(*notification_comm)); | |
a58c490f JG |
87 | |
88 | if (!src_view || !notification) { | |
89 | ret = -1; | |
90 | goto end; | |
91 | } | |
92 | ||
3e6e0df2 JG |
93 | if (!lttng_payload_view_is_valid(¬ification_comm_view)) { |
94 | /* Payload not large enough to contain the header. */ | |
95 | ret = -1; | |
96 | goto end; | |
97 | } | |
98 | ||
99 | notification_comm = (typeof(notification_comm)) notification_comm_view.buffer.data; | |
a58c490f | 100 | notification_size += sizeof(*notification_comm); |
c0a66c84 JG |
101 | { |
102 | /* struct lttng_condition */ | |
103 | struct lttng_payload_view condition_view = | |
104 | lttng_payload_view_from_view(src_view, | |
105 | notification_size, -1); | |
106 | ||
107 | condition_size = lttng_condition_create_from_payload( | |
108 | &condition_view, &condition); | |
109 | } | |
a58c490f | 110 | |
a58c490f JG |
111 | if (condition_size < 0) { |
112 | ret = condition_size; | |
113 | goto end; | |
114 | } | |
c0a66c84 | 115 | |
a58c490f JG |
116 | notification_size += condition_size; |
117 | ||
c0a66c84 JG |
118 | { |
119 | /* struct lttng_evaluation */ | |
120 | struct lttng_payload_view evaluation_view = | |
121 | lttng_payload_view_from_view(src_view, | |
122 | notification_size, -1); | |
123 | ||
124 | evaluation_size = lttng_evaluation_create_from_payload( | |
7c920b63 | 125 | condition, &evaluation_view, &evaluation); |
c0a66c84 JG |
126 | } |
127 | ||
a58c490f JG |
128 | if (evaluation_size < 0) { |
129 | ret = evaluation_size; | |
130 | goto end; | |
131 | } | |
c0a66c84 | 132 | |
a58c490f JG |
133 | notification_size += evaluation_size; |
134 | ||
135 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
136 | if ((ssize_t) notification_comm->length != | |
137 | condition_size + evaluation_size) { | |
138 | ret = -1; | |
139 | goto error; | |
140 | } | |
141 | ||
142 | *notification = lttng_notification_create(condition, evaluation); | |
143 | if (!*notification) { | |
144 | ret = -1; | |
145 | goto error; | |
146 | } | |
147 | ret = notification_size; | |
a58c490f JG |
148 | end: |
149 | return ret; | |
150 | error: | |
151 | lttng_condition_destroy(condition); | |
152 | lttng_evaluation_destroy(evaluation); | |
153 | return ret; | |
154 | } | |
155 | ||
156 | void lttng_notification_destroy(struct lttng_notification *notification) | |
157 | { | |
158 | if (!notification) { | |
159 | return; | |
160 | } | |
161 | ||
9b63a4aa JG |
162 | lttng_condition_destroy(notification->condition); |
163 | lttng_evaluation_destroy(notification->evaluation); | |
a58c490f JG |
164 | free(notification); |
165 | } | |
166 | ||
167 | const struct lttng_condition *lttng_notification_get_condition( | |
168 | struct lttng_notification *notification) | |
169 | { | |
170 | return notification ? notification->condition : NULL; | |
171 | } | |
172 | ||
173 | const struct lttng_evaluation *lttng_notification_get_evaluation( | |
174 | struct lttng_notification *notification) | |
175 | { | |
176 | return notification ? notification->evaluation : NULL; | |
177 | } |