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27993cc2 JG |
1 | /* |
2 | * Copyright (C) 2021 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
c9e313bc | 8 | #include <lttng/action/path-internal.hpp> |
27993cc2 | 9 | |
f1494934 | 10 | namespace { |
27993cc2 JG |
11 | struct lttng_action_path_comm { |
12 | uint32_t index_count; | |
13 | uint64_t indexes[]; | |
14 | } LTTNG_PACKED; | |
f1494934 | 15 | } /* namespace */ |
27993cc2 JG |
16 | |
17 | struct lttng_action_path *lttng_action_path_create( | |
18 | const uint64_t *indexes, size_t index_count) | |
19 | { | |
20 | int ret; | |
21 | size_t i; | |
22 | struct lttng_action_path *path = NULL; | |
23 | ||
24 | if (!indexes && index_count > 0) { | |
25 | goto error; | |
26 | } | |
27 | ||
64803277 | 28 | path = zmalloc<lttng_action_path>(); |
27993cc2 JG |
29 | if (!path) { |
30 | goto error; | |
31 | } | |
32 | ||
33 | lttng_dynamic_array_init(&path->indexes, sizeof(uint64_t), NULL); | |
27993cc2 JG |
34 | |
35 | for (i = 0; i < index_count; i++) { | |
36 | ret = lttng_dynamic_array_add_element( | |
37 | &path->indexes, &indexes[i]); | |
38 | if (ret) { | |
39 | goto error; | |
40 | } | |
41 | } | |
42 | ||
43 | goto end; | |
44 | error: | |
45 | lttng_action_path_destroy(path); | |
46 | path = NULL; | |
47 | end: | |
48 | return path; | |
49 | } | |
50 | ||
51 | enum lttng_action_path_status lttng_action_path_get_index_count( | |
52 | const struct lttng_action_path *path, size_t *index_count) | |
53 | { | |
54 | enum lttng_action_path_status status; | |
55 | ||
56 | if (!path || !index_count) { | |
57 | status = LTTNG_ACTION_PATH_STATUS_INVALID; | |
58 | goto end; | |
59 | } | |
60 | ||
61 | *index_count = lttng_dynamic_array_get_count(&path->indexes); | |
62 | status = LTTNG_ACTION_PATH_STATUS_OK; | |
63 | end: | |
64 | return status; | |
65 | } | |
66 | ||
67 | enum lttng_action_path_status lttng_action_path_get_index_at_index( | |
68 | const struct lttng_action_path *path, | |
69 | size_t path_index, | |
70 | uint64_t *out_index) | |
71 | { | |
72 | enum lttng_action_path_status status; | |
73 | ||
74 | if (!path || !out_index || | |
75 | path_index >= lttng_dynamic_array_get_count( | |
76 | &path->indexes)) { | |
77 | status = LTTNG_ACTION_PATH_STATUS_INVALID; | |
78 | goto end; | |
79 | } | |
80 | ||
81 | *out_index = *((typeof(out_index)) lttng_dynamic_array_get_element( | |
82 | &path->indexes, path_index)); | |
83 | status = LTTNG_ACTION_PATH_STATUS_OK; | |
84 | end: | |
85 | return status; | |
86 | } | |
87 | ||
88 | void lttng_action_path_destroy(struct lttng_action_path *action_path) | |
89 | { | |
90 | if (!action_path) { | |
91 | goto end; | |
92 | } | |
93 | ||
94 | lttng_dynamic_array_reset(&action_path->indexes); | |
95 | free(action_path); | |
96 | end: | |
97 | return; | |
98 | } | |
99 | ||
27993cc2 | 100 | int lttng_action_path_copy(const struct lttng_action_path *src, |
1ad48d96 | 101 | struct lttng_action_path **dst) |
27993cc2 JG |
102 | { |
103 | int ret; | |
1ad48d96 | 104 | struct lttng_action_path *new_path; |
27993cc2 | 105 | |
a0377dfe FD |
106 | LTTNG_ASSERT(src); |
107 | LTTNG_ASSERT(dst); | |
27993cc2 | 108 | |
1ad48d96 JG |
109 | new_path = lttng_action_path_create( |
110 | (uint64_t *) lttng_dynamic_array_get_element( | |
111 | &src->indexes, 0), | |
112 | lttng_dynamic_array_get_count(&src->indexes)); | |
113 | if (!new_path) { | |
114 | ret = -1; | |
115 | } else { | |
116 | ret = 0; | |
117 | *dst = new_path; | |
27993cc2 JG |
118 | } |
119 | ||
27993cc2 JG |
120 | return ret; |
121 | } | |
122 | ||
27993cc2 JG |
123 | ssize_t lttng_action_path_create_from_payload( |
124 | struct lttng_payload_view *view, | |
125 | struct lttng_action_path **_action_path) | |
126 | { | |
127 | ssize_t consumed_size = 0, ret = -1; | |
128 | const struct lttng_action_path_comm *header; | |
129 | struct lttng_action_path *action_path = NULL; | |
130 | const struct lttng_payload_view header_view = | |
131 | lttng_payload_view_from_view(view, 0, sizeof(*header)); | |
132 | ||
133 | if (!lttng_payload_view_is_valid(&header_view)) { | |
134 | goto end; | |
135 | } | |
136 | ||
137 | header = (typeof(header)) header_view.buffer.data; | |
138 | consumed_size += header_view.buffer.size; | |
7afaf43b JR |
139 | |
140 | /* | |
141 | * An action path of size 0 can exist and represents a trigger with a | |
142 | * single non-list action. Handle it differently since a payload view of | |
143 | * size 0 is considered invalid. | |
144 | */ | |
145 | if (header->index_count != 0) | |
27993cc2 JG |
146 | { |
147 | const struct lttng_payload_view indexes_view = | |
148 | lttng_payload_view_from_view(view, | |
149 | consumed_size, | |
150 | header->index_count * | |
151 | sizeof(uint64_t)); | |
152 | ||
153 | if (!lttng_payload_view_is_valid(&indexes_view)) { | |
154 | goto end; | |
155 | } | |
156 | ||
157 | consumed_size += indexes_view.buffer.size; | |
158 | action_path = lttng_action_path_create( | |
159 | (const uint64_t *) indexes_view.buffer.data, | |
160 | header->index_count); | |
161 | if (!action_path) { | |
162 | goto end; | |
163 | } | |
7afaf43b JR |
164 | } else { |
165 | action_path = lttng_action_path_create(NULL, 0); | |
166 | if (!action_path) { | |
167 | goto end; | |
168 | } | |
27993cc2 JG |
169 | } |
170 | ||
171 | ret = consumed_size; | |
cb9222ff | 172 | *_action_path = action_path; |
27993cc2 JG |
173 | end: |
174 | return ret; | |
175 | } | |
176 | ||
27993cc2 JG |
177 | int lttng_action_path_serialize(const struct lttng_action_path *action_path, |
178 | struct lttng_payload *payload) | |
179 | { | |
180 | int ret; | |
181 | size_t index_count, i; | |
182 | enum lttng_action_path_status status; | |
a6bc4ca9 | 183 | lttng_action_path_comm comm; |
27993cc2 JG |
184 | |
185 | status = lttng_action_path_get_index_count(action_path, &index_count); | |
186 | if (status != LTTNG_ACTION_PATH_STATUS_OK) { | |
187 | ret = -1; | |
188 | goto end; | |
189 | } | |
190 | ||
a6bc4ca9 SM |
191 | comm = { |
192 | .index_count = (uint32_t) index_count, | |
193 | }; | |
27993cc2 | 194 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
a6bc4ca9 | 195 | &comm, |
27993cc2 JG |
196 | sizeof(struct lttng_action_path_comm)); |
197 | ||
198 | for (i = 0; i < index_count; i++) { | |
199 | uint64_t path_index; | |
200 | ||
201 | status = lttng_action_path_get_index_at_index( | |
202 | action_path, i, &path_index); | |
203 | if (status != LTTNG_ACTION_PATH_STATUS_OK) { | |
204 | ret = -1; | |
205 | goto end; | |
206 | } | |
207 | ||
208 | ret = lttng_dynamic_buffer_append(&payload->buffer, &path_index, | |
209 | sizeof(path_index)); | |
210 | if (ret) { | |
211 | goto end; | |
212 | } | |
213 | } | |
214 | ||
215 | ret = 0; | |
216 | end: | |
217 | return ret; | |
218 | } |