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> | |
13 | #include <assert.h> | |
14 | ||
15 | LTTNG_HIDDEN | |
16 | struct lttng_notification *lttng_notification_create( | |
17 | struct lttng_condition *condition, | |
18 | struct lttng_evaluation *evaluation) | |
19 | { | |
20 | struct lttng_notification *notification = NULL; | |
21 | ||
22 | if (!condition || !evaluation) { | |
23 | goto end; | |
24 | } | |
25 | ||
26 | notification = zmalloc(sizeof(struct lttng_notification)); | |
27 | if (!notification) { | |
28 | goto end; | |
29 | } | |
30 | ||
31 | notification->condition = condition; | |
32 | notification->evaluation = evaluation; | |
a58c490f JG |
33 | end: |
34 | return notification; | |
35 | } | |
36 | ||
37 | LTTNG_HIDDEN | |
9b63a4aa | 38 | int lttng_notification_serialize(const struct lttng_notification *notification, |
3647288f | 39 | struct lttng_dynamic_buffer *buf) |
a58c490f | 40 | { |
3647288f JG |
41 | int ret; |
42 | size_t header_offset, size_before_payload; | |
1e9e2705 | 43 | struct lttng_notification_comm notification_comm = { 0 }; |
3647288f | 44 | struct lttng_notification_comm *header; |
a58c490f | 45 | |
3647288f JG |
46 | header_offset = buf->size; |
47 | ret = lttng_dynamic_buffer_append(buf, ¬ification_comm, | |
48 | sizeof(notification_comm)); | |
28cff59f JG |
49 | if (ret) { |
50 | goto end; | |
51 | } | |
a58c490f | 52 | |
3647288f JG |
53 | size_before_payload = buf->size; |
54 | ret = lttng_condition_serialize(notification->condition, | |
55 | buf); | |
56 | if (ret) { | |
a58c490f JG |
57 | goto end; |
58 | } | |
a58c490f | 59 | |
3647288f JG |
60 | ret = lttng_evaluation_serialize(notification->evaluation, buf); |
61 | if (ret) { | |
a58c490f JG |
62 | goto end; |
63 | } | |
a58c490f | 64 | |
3647288f JG |
65 | /* Update payload size. */ |
66 | header = (struct lttng_notification_comm *) ((char *) buf->data + header_offset); | |
67 | header->length = (uint32_t) (buf->size - size_before_payload); | |
a58c490f JG |
68 | end: |
69 | return ret; | |
70 | ||
71 | } | |
72 | ||
73 | LTTNG_HIDDEN | |
74 | ssize_t lttng_notification_create_from_buffer( | |
75 | const struct lttng_buffer_view *src_view, | |
76 | struct lttng_notification **notification) | |
77 | { | |
78 | ssize_t ret, notification_size = 0, condition_size, evaluation_size; | |
79 | const struct lttng_notification_comm *notification_comm; | |
80 | struct lttng_condition *condition; | |
81 | struct lttng_evaluation *evaluation; | |
82 | struct lttng_buffer_view condition_view; | |
83 | struct lttng_buffer_view evaluation_view; | |
84 | ||
85 | if (!src_view || !notification) { | |
86 | ret = -1; | |
87 | goto end; | |
88 | } | |
89 | ||
90 | notification_comm = | |
91 | (const struct lttng_notification_comm *) src_view->data; | |
92 | notification_size += sizeof(*notification_comm); | |
93 | ||
94 | /* struct lttng_condition */ | |
95 | condition_view = lttng_buffer_view_from_view(src_view, | |
96 | sizeof(*notification_comm), -1); | |
97 | condition_size = lttng_condition_create_from_buffer(&condition_view, | |
98 | &condition); | |
99 | if (condition_size < 0) { | |
100 | ret = condition_size; | |
101 | goto end; | |
102 | } | |
103 | notification_size += condition_size; | |
104 | ||
105 | /* struct lttng_evaluation */ | |
106 | evaluation_view = lttng_buffer_view_from_view(&condition_view, | |
107 | condition_size, -1); | |
108 | evaluation_size = lttng_evaluation_create_from_buffer(&evaluation_view, | |
109 | &evaluation); | |
110 | if (evaluation_size < 0) { | |
111 | ret = evaluation_size; | |
112 | goto end; | |
113 | } | |
114 | notification_size += evaluation_size; | |
115 | ||
116 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
117 | if ((ssize_t) notification_comm->length != | |
118 | condition_size + evaluation_size) { | |
119 | ret = -1; | |
120 | goto error; | |
121 | } | |
122 | ||
123 | *notification = lttng_notification_create(condition, evaluation); | |
124 | if (!*notification) { | |
125 | ret = -1; | |
126 | goto error; | |
127 | } | |
128 | ret = notification_size; | |
a58c490f JG |
129 | end: |
130 | return ret; | |
131 | error: | |
132 | lttng_condition_destroy(condition); | |
133 | lttng_evaluation_destroy(evaluation); | |
134 | return ret; | |
135 | } | |
136 | ||
137 | void lttng_notification_destroy(struct lttng_notification *notification) | |
138 | { | |
139 | if (!notification) { | |
140 | return; | |
141 | } | |
142 | ||
9b63a4aa JG |
143 | lttng_condition_destroy(notification->condition); |
144 | lttng_evaluation_destroy(notification->evaluation); | |
a58c490f JG |
145 | free(notification); |
146 | } | |
147 | ||
148 | const struct lttng_condition *lttng_notification_get_condition( | |
149 | struct lttng_notification *notification) | |
150 | { | |
151 | return notification ? notification->condition : NULL; | |
152 | } | |
153 | ||
154 | const struct lttng_evaluation *lttng_notification_get_evaluation( | |
155 | struct lttng_notification *notification) | |
156 | { | |
157 | return notification ? notification->evaluation : NULL; | |
158 | } |