Commit | Line | Data |
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7a278c8e | 1 | /* |
ea0b4b9e | 2 | * fs.c |
7a278c8e | 3 | * |
ea0b4b9e | 4 | * Babeltrace CTF file system Reader Component |
7a278c8e | 5 | * |
f3bc2010 | 6 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
7a278c8e JG |
7 | * |
8 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
9 | * | |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
11 | * of this software and associated documentation files (the "Software"), to deal | |
12 | * in the Software without restriction, including without limitation the rights | |
13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
14 | * copies of the Software, and to permit persons to whom the Software is | |
15 | * furnished to do so, subject to the following conditions: | |
16 | * | |
17 | * The above copyright notice and this permission notice shall be included in | |
18 | * all copies or substantial portions of the Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
26 | * SOFTWARE. | |
27 | */ | |
28 | ||
ea0b4b9e | 29 | #include <babeltrace/plugin/plugin-system.h> |
760051fa | 30 | #include <babeltrace/plugin/notification/iterator.h> |
ea0b4b9e JG |
31 | #include <glib.h> |
32 | #include <assert.h> | |
56a1cced JG |
33 | #include <unistd.h> |
34 | #include "fs.h" | |
413bc2c4 JG |
35 | #include "metadata.h" |
36 | #include "data-stream.h" | |
ea0b4b9e JG |
37 | |
38 | static bool ctf_fs_debug; | |
39 | ||
40 | static | |
760051fa JG |
41 | struct bt_notification *ctf_fs_iterator_get( |
42 | struct bt_notification_iterator *iterator) | |
ea0b4b9e | 43 | { |
d01e0f33 JG |
44 | struct bt_notification *notification = NULL; |
45 | struct ctf_fs_component *ctf_fs; | |
46 | struct bt_component *component = bt_notification_iterator_get_component( | |
47 | iterator); | |
48 | ||
49 | if (!component) { | |
50 | goto end; | |
51 | } | |
52 | ||
53 | ctf_fs = bt_component_get_private_data(component); | |
54 | if (!ctf_fs) { | |
55 | goto end; | |
56 | } | |
57 | ||
58 | notification = bt_get(ctf_fs->current_notification); | |
59 | end: | |
60 | return notification; | |
ea0b4b9e JG |
61 | } |
62 | ||
63 | static | |
760051fa JG |
64 | enum bt_notification_iterator_status ctf_fs_iterator_next( |
65 | struct bt_notification_iterator *iterator) | |
ea0b4b9e | 66 | { |
d01e0f33 | 67 | enum bt_notification_iterator_status ret; |
78586d8a | 68 | struct bt_notification *notification = NULL; |
d01e0f33 JG |
69 | struct ctf_fs_component *ctf_fs; |
70 | struct bt_component *component = bt_notification_iterator_get_component( | |
71 | iterator); | |
72 | ||
73 | if (!component) { | |
74 | ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
75 | goto end; | |
76 | } | |
77 | ||
7aeb43bf JG |
78 | ctf_fs = bt_component_get_private_data(component); |
79 | assert(ctf_fs); | |
80 | ||
d01e0f33 JG |
81 | ret = ctf_fs_data_stream_get_next_notification(ctf_fs, ¬ification); |
82 | if (ret || !notification) { | |
83 | goto end; | |
84 | } | |
85 | ||
78586d8a JG |
86 | bt_put(ctf_fs->current_notification); |
87 | ctf_fs->current_notification = notification; | |
d01e0f33 | 88 | end: |
043e2020 | 89 | return ret; |
ea0b4b9e | 90 | } |
bfd20a42 | 91 | |
760051fa JG |
92 | static |
93 | void ctf_fs_iterator_destroy_data(struct ctf_fs_iterator *ctf_it) | |
94 | { | |
95 | g_free(ctf_it); | |
96 | } | |
97 | ||
98 | static | |
99 | void ctf_fs_iterator_destroy(struct bt_notification_iterator *it) | |
100 | { | |
101 | void *data = bt_notification_iterator_get_private_data(it); | |
102 | ||
103 | ctf_fs_iterator_destroy_data(data); | |
104 | } | |
105 | ||
106 | static | |
ea0b4b9e JG |
107 | enum bt_component_status ctf_fs_iterator_init(struct bt_component *source, |
108 | struct bt_notification_iterator *it) | |
4c1456f0 | 109 | { |
760051fa | 110 | struct ctf_fs_iterator *ctf_it; |
413bc2c4 | 111 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; |
ea0b4b9e JG |
112 | |
113 | assert(source && it); | |
760051fa JG |
114 | ctf_it = g_new0(struct ctf_fs_iterator, 1); |
115 | if (!ctf_it) { | |
116 | ret = BT_COMPONENT_STATUS_NOMEM; | |
117 | goto end; | |
118 | } | |
119 | ||
120 | ret = bt_notification_iterator_set_get_cb(it, ctf_fs_iterator_get); | |
121 | if (ret) { | |
122 | goto error; | |
123 | } | |
124 | ||
125 | ret = bt_notification_iterator_set_next_cb(it, ctf_fs_iterator_next); | |
126 | if (ret) { | |
127 | goto error; | |
128 | } | |
129 | ||
130 | ret = bt_notification_iterator_set_destroy_cb(it, | |
131 | ctf_fs_iterator_destroy); | |
132 | if (ret) { | |
133 | goto error; | |
134 | } | |
135 | ||
136 | ret = bt_notification_iterator_set_private_data(it, ctf_it); | |
137 | if (ret) { | |
138 | goto error; | |
139 | } | |
140 | end: | |
ea0b4b9e | 141 | return ret; |
760051fa JG |
142 | error: |
143 | (void) bt_notification_iterator_set_private_data(it, NULL); | |
144 | ctf_fs_iterator_destroy_data(ctf_it); | |
145 | return ret; | |
146 | } | |
147 | ||
760051fa JG |
148 | static |
149 | void ctf_fs_destroy_data(struct ctf_fs_component *component) | |
150 | { | |
56a1cced JG |
151 | if (component->trace_path) { |
152 | g_string_free(component->trace_path, TRUE); | |
153 | } | |
154 | ||
413bc2c4 JG |
155 | ctf_fs_metadata_fini(&component->metadata); |
156 | ctf_fs_data_stream_fini(&component->data_stream); | |
d01e0f33 | 157 | BT_PUT(component->current_notification); |
760051fa JG |
158 | g_free(component); |
159 | } | |
160 | ||
161 | static | |
162 | void ctf_fs_destroy(struct bt_component *component) | |
163 | { | |
164 | void *data = bt_component_get_private_data(component); | |
165 | ||
166 | ctf_fs_destroy_data(data); | |
4c1456f0 JG |
167 | } |
168 | ||
56a1cced JG |
169 | static |
170 | struct ctf_fs_component *ctf_fs_create(struct bt_value *params) | |
171 | { | |
172 | struct ctf_fs_component *ctf_fs; | |
1ef09eb5 | 173 | struct bt_value *value = NULL; |
56a1cced JG |
174 | const char *path; |
175 | enum bt_value_status ret; | |
176 | ||
177 | ctf_fs = g_new0(struct ctf_fs_component, 1); | |
178 | if (!ctf_fs) { | |
179 | goto end; | |
180 | } | |
181 | ||
182 | /* FIXME: should probably look for a source URI */ | |
183 | value = bt_value_map_get(params, "path"); | |
184 | if (!value || bt_value_is_null(value) || !bt_value_is_string(value)) { | |
185 | goto error; | |
186 | } | |
187 | ||
188 | ret = bt_value_string_get(value, &path); | |
189 | if (ret != BT_VALUE_STATUS_OK) { | |
190 | goto error; | |
191 | } | |
192 | ||
193 | ctf_fs->trace_path = g_string_new(path); | |
194 | if (!ctf_fs->trace_path) { | |
195 | goto error; | |
196 | } | |
197 | ||
198 | ctf_fs->error_fp = stderr; | |
199 | ctf_fs->page_size = (size_t) getpagesize(); | |
413bc2c4 JG |
200 | ctf_fs_data_stream_init(ctf_fs, &ctf_fs->data_stream); |
201 | ctf_fs_metadata_set_trace(ctf_fs); | |
202 | ctf_fs_data_stream_open_streams(ctf_fs); | |
1ef09eb5 JG |
203 | goto end; |
204 | ||
56a1cced JG |
205 | error: |
206 | ctf_fs_destroy_data(ctf_fs); | |
1ef09eb5 JG |
207 | end: |
208 | BT_PUT(value); | |
56a1cced JG |
209 | return ctf_fs; |
210 | } | |
211 | ||
ea0b4b9e JG |
212 | BT_HIDDEN |
213 | enum bt_component_status ctf_fs_init(struct bt_component *source, | |
5c80adeb | 214 | struct bt_value *params) |
ea0b4b9e JG |
215 | { |
216 | struct ctf_fs_component *ctf_fs; | |
217 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; | |
218 | ||
219 | assert(source); | |
220 | ctf_fs_debug = g_strcmp0(getenv("CTF_FS_DEBUG"), "1") == 0; | |
221 | ctf_fs = ctf_fs_create(params); | |
222 | if (!ctf_fs) { | |
223 | ret = BT_COMPONENT_STATUS_NOMEM; | |
224 | goto end; | |
225 | } | |
4c1456f0 | 226 | |
ea0b4b9e JG |
227 | ret = bt_component_set_destroy_cb(source, ctf_fs_destroy); |
228 | if (ret != BT_COMPONENT_STATUS_OK) { | |
229 | goto error; | |
230 | } | |
231 | ||
232 | ret = bt_component_set_private_data(source, ctf_fs); | |
233 | if (ret != BT_COMPONENT_STATUS_OK) { | |
234 | goto error; | |
235 | } | |
236 | ||
237 | ret = bt_component_source_set_iterator_init_cb(source, | |
238 | ctf_fs_iterator_init); | |
239 | if (ret != BT_COMPONENT_STATUS_OK) { | |
240 | goto error; | |
241 | } | |
242 | end: | |
243 | return ret; | |
244 | error: | |
245 | (void) bt_component_set_private_data(source, NULL); | |
760051fa | 246 | ctf_fs_destroy_data(ctf_fs); |
ea0b4b9e JG |
247 | return ret; |
248 | } |