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6f4eefbe PP |
1 | /* |
2 | * Copyright 2019 Philippe Proulx <pproulx@efficios.com> | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to deal | |
6 | * in the Software without restriction, including without limitation the rights | |
7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | * copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
20 | * SOFTWARE. | |
21 | */ | |
22 | ||
c864e29a | 23 | #define BT_LOG_OUTPUT_LEVEL (ctfser->log_level) |
6f4eefbe | 24 | #define BT_LOG_TAG "CTFSER" |
c864e29a | 25 | #include "logging/log.h" |
6f4eefbe PP |
26 | |
27 | #include <unistd.h> | |
28 | #include <string.h> | |
29 | #include <inttypes.h> | |
30 | #include <sys/types.h> | |
31 | #include <sys/stat.h> | |
32 | #include <unistd.h> | |
57952005 | 33 | #include "common/assert.h" |
6f4eefbe PP |
34 | #include <stdarg.h> |
35 | #include <ctype.h> | |
36 | #include <glib.h> | |
37 | #include <stdlib.h> | |
38 | #include <stdio.h> | |
39 | #include <wchar.h> | |
85e7137b | 40 | #include "common/macros.h" |
57952005 MJ |
41 | #include "common/common.h" |
42 | #include "ctfser/ctfser.h" | |
43 | #include "compat/unistd.h" | |
44 | #include "compat/fcntl.h" | |
6f4eefbe PP |
45 | |
46 | static inline | |
c864e29a | 47 | uint64_t get_packet_size_increment_bytes(struct bt_ctfser *ctfser) |
6f4eefbe | 48 | { |
c864e29a | 49 | return bt_common_get_page_size(ctfser->log_level) * 8; |
6f4eefbe PP |
50 | } |
51 | ||
52 | static inline | |
53 | void mmap_align_ctfser(struct bt_ctfser *ctfser) | |
54 | { | |
a2253429 MJ |
55 | ctfser->base_mma = mmap_align(ctfser->cur_packet_size_bytes, |
56 | PROT_READ | PROT_WRITE, | |
c864e29a | 57 | MAP_SHARED, ctfser->fd, ctfser->mmap_offset, ctfser->log_level); |
6f4eefbe PP |
58 | } |
59 | ||
60 | BT_HIDDEN | |
61 | int _bt_ctfser_increase_cur_packet_size(struct bt_ctfser *ctfser) | |
62 | { | |
63 | int ret; | |
64 | ||
65 | BT_ASSERT(ctfser); | |
a684a357 | 66 | BT_LOGD("Increasing stream file's current packet size: " |
6f4eefbe PP |
67 | "path=\"%s\", fd=%d, " |
68 | "offset-in-cur-packet-bits=%" PRIu64 ", " | |
69 | "cur-packet-size-bytes=%" PRIu64, | |
70 | ctfser->path->str, ctfser->fd, | |
71 | ctfser->offset_in_cur_packet_bits, | |
72 | ctfser->cur_packet_size_bytes); | |
73 | ret = munmap_align(ctfser->base_mma); | |
74 | if (ret) { | |
75 | BT_LOGE_ERRNO("Failed to perform an aligned memory unmapping", | |
76 | ": ret=%d", ret); | |
77 | goto end; | |
78 | } | |
79 | ||
c864e29a PP |
80 | ctfser->cur_packet_size_bytes += get_packet_size_increment_bytes( |
81 | ctfser); | |
6f4eefbe PP |
82 | |
83 | do { | |
84 | ret = bt_posix_fallocate(ctfser->fd, ctfser->mmap_offset, | |
85 | ctfser->cur_packet_size_bytes); | |
86 | } while (ret == EINTR); | |
87 | ||
88 | if (ret) { | |
89 | BT_LOGE("Failed to preallocate memory space: ret=%d", ret); | |
90 | goto end; | |
91 | } | |
92 | ||
93 | mmap_align_ctfser(ctfser); | |
94 | if (ctfser->base_mma == MAP_FAILED) { | |
95 | BT_LOGE_ERRNO("Failed to perform an aligned memory mapping", | |
96 | ": ret=%d", ret); | |
97 | ret = -1; | |
98 | goto end; | |
99 | } | |
100 | ||
a684a357 | 101 | BT_LOGD("Increased packet size: " |
6f4eefbe PP |
102 | "path=\"%s\", fd=%d, " |
103 | "offset-in-cur-packet-bits=%" PRIu64 ", " | |
104 | "new-packet-size-bytes=%" PRIu64, | |
105 | ctfser->path->str, ctfser->fd, | |
106 | ctfser->offset_in_cur_packet_bits, | |
107 | ctfser->cur_packet_size_bytes); | |
108 | ||
109 | end: | |
110 | return ret; | |
111 | } | |
112 | ||
113 | BT_HIDDEN | |
c864e29a | 114 | int bt_ctfser_init(struct bt_ctfser *ctfser, const char *path, int log_level) |
6f4eefbe PP |
115 | { |
116 | int ret = 0; | |
117 | ||
118 | BT_ASSERT(ctfser); | |
119 | memset(ctfser, 0, sizeof(*ctfser)); | |
120 | ctfser->fd = open(path, O_RDWR | O_CREAT | O_TRUNC, | |
121 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
c864e29a | 122 | ctfser->log_level = log_level; |
6f4eefbe PP |
123 | if (ctfser->fd < 0) { |
124 | BT_LOGW_ERRNO("Failed to open stream file for writing", | |
125 | ": path=\"%s\", ret=%d", | |
126 | path, ctfser->fd); | |
127 | ret = -1; | |
128 | goto end; | |
129 | } | |
130 | ||
131 | ctfser->path = g_string_new(path); | |
132 | ||
133 | end: | |
134 | return ret; | |
135 | } | |
136 | ||
137 | BT_HIDDEN | |
138 | int bt_ctfser_fini(struct bt_ctfser *ctfser) | |
139 | { | |
140 | int ret = 0; | |
141 | ||
142 | if (ctfser->fd == -1) { | |
143 | goto free_path; | |
144 | } | |
145 | ||
2b039955 JR |
146 | if (ctfser->base_mma) { |
147 | /* Unmap old base */ | |
148 | ret = munmap_align(ctfser->base_mma); | |
149 | if (ret) { | |
150 | BT_LOGE_ERRNO("Failed to unmap stream file", | |
151 | ": ret=%d, size-bytes=%" PRIu64, | |
152 | ret, ctfser->stream_size_bytes); | |
153 | goto end; | |
154 | } | |
155 | ||
156 | ctfser->base_mma = NULL; | |
157 | } | |
158 | ||
6f4eefbe PP |
159 | /* |
160 | * Truncate the stream file's size to the minimum required to | |
161 | * fit the last packet as we might have grown it too much during | |
162 | * the last memory map. | |
163 | */ | |
164 | do { | |
165 | ret = ftruncate(ctfser->fd, ctfser->stream_size_bytes); | |
166 | } while (ret == -1 && errno == EINTR); | |
167 | ||
168 | if (ret) { | |
169 | BT_LOGE_ERRNO("Failed to truncate stream file", | |
170 | ": ret=%d, size-bytes=%" PRIu64, | |
171 | ret, ctfser->stream_size_bytes); | |
172 | goto end; | |
173 | } | |
174 | ||
6f4eefbe PP |
175 | |
176 | ret = close(ctfser->fd); | |
177 | if (ret) { | |
178 | BT_LOGE_ERRNO("Failed to close stream file", | |
179 | ": ret=%d", ret); | |
180 | goto end; | |
181 | } | |
182 | ||
183 | ctfser->fd = -1; | |
184 | ||
185 | free_path: | |
186 | if (ctfser->path) { | |
187 | g_string_free(ctfser->path, TRUE); | |
188 | ctfser->path = NULL; | |
189 | } | |
190 | ||
191 | end: | |
192 | return ret; | |
193 | } | |
194 | ||
195 | BT_HIDDEN | |
196 | int bt_ctfser_open_packet(struct bt_ctfser *ctfser) | |
197 | { | |
198 | int ret = 0; | |
199 | ||
a684a357 | 200 | BT_LOGD("Opening packet: path=\"%s\", fd=%d, " |
6f4eefbe PP |
201 | "prev-packet-size-bytes=%" PRIu64, |
202 | ctfser->path->str, ctfser->fd, | |
203 | ctfser->prev_packet_size_bytes); | |
204 | ||
205 | if (ctfser->base_mma) { | |
206 | /* Unmap old base (previous packet) */ | |
207 | ret = munmap_align(ctfser->base_mma); | |
208 | if (ret) { | |
209 | BT_LOGE_ERRNO("Failed to unmap stream file", | |
210 | ": ret=%d, size-bytes=%" PRIu64, | |
211 | ret, ctfser->stream_size_bytes); | |
212 | goto end; | |
213 | } | |
214 | ||
215 | ctfser->base_mma = NULL; | |
216 | } | |
217 | ||
218 | /* | |
219 | * Add the previous packet's size to the memory map address | |
220 | * offset to start writing immediately after it. | |
221 | */ | |
222 | ctfser->mmap_offset += ctfser->prev_packet_size_bytes; | |
223 | ctfser->prev_packet_size_bytes = 0; | |
224 | ||
225 | /* Make initial space for the current packet */ | |
c864e29a PP |
226 | ctfser->cur_packet_size_bytes = get_packet_size_increment_bytes( |
227 | ctfser); | |
6f4eefbe PP |
228 | |
229 | do { | |
230 | ret = bt_posix_fallocate(ctfser->fd, ctfser->mmap_offset, | |
231 | ctfser->cur_packet_size_bytes); | |
232 | } while (ret == EINTR); | |
233 | ||
234 | if (ret) { | |
235 | BT_LOGE("Failed to preallocate memory space: ret=%d", ret); | |
236 | goto end; | |
237 | } | |
238 | ||
239 | /* Start writing at the beginning of the current packet */ | |
240 | ctfser->offset_in_cur_packet_bits = 0; | |
241 | ||
242 | /* Get new base address */ | |
243 | mmap_align_ctfser(ctfser); | |
244 | if (ctfser->base_mma == MAP_FAILED) { | |
245 | BT_LOGE_ERRNO("Failed to perform an aligned memory mapping", | |
246 | ": ret=%d", ret); | |
247 | ret = -1; | |
248 | goto end; | |
249 | } | |
250 | ||
a684a357 | 251 | BT_LOGD("Opened packet: path=\"%s\", fd=%d, " |
6f4eefbe PP |
252 | "cur-packet-size-bytes=%" PRIu64, |
253 | ctfser->path->str, ctfser->fd, | |
254 | ctfser->cur_packet_size_bytes); | |
255 | ||
256 | end: | |
257 | return ret; | |
258 | } | |
259 | ||
260 | BT_HIDDEN | |
261 | void bt_ctfser_close_current_packet(struct bt_ctfser *ctfser, | |
262 | uint64_t packet_size_bytes) | |
263 | { | |
a684a357 | 264 | BT_LOGD("Closing packet: path=\"%s\", fd=%d, " |
6f4eefbe PP |
265 | "offset-in-cur-packet-bits=%" PRIu64 |
266 | "cur-packet-size-bytes=%" PRIu64, | |
267 | ctfser->path->str, ctfser->fd, | |
268 | ctfser->offset_in_cur_packet_bits, | |
269 | ctfser->cur_packet_size_bytes); | |
270 | ||
271 | /* | |
272 | * This will be used during the next call to | |
273 | * bt_ctfser_open_packet(): we add | |
274 | * `ctfser->prev_packet_size_bytes` to the current memory map | |
275 | * address offset (first byte of _this_ packet), effectively | |
276 | * making _this_ packet the required size. | |
277 | */ | |
278 | ctfser->prev_packet_size_bytes = packet_size_bytes; | |
279 | ctfser->stream_size_bytes += packet_size_bytes; | |
a684a357 | 280 | BT_LOGD("Closed packet: path=\"%s\", fd=%d, " |
6f4eefbe PP |
281 | "stream-file-size-bytes=%" PRIu64, |
282 | ctfser->path->str, ctfser->fd, | |
283 | ctfser->stream_size_bytes); | |
284 | } |