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013f35c6 | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
013f35c6 | 3 | * |
0235b0db | 4 | * Copyright 2019 Philippe Proulx <pproulx@efficios.com> |
013f35c6 PP |
5 | */ |
6 | ||
86d8b7b8 | 7 | #define BT_LOG_OUTPUT_LEVEL (ctfser->log_level) |
013f35c6 | 8 | #define BT_LOG_TAG "CTFSER" |
86d8b7b8 | 9 | #include "logging/log.h" |
013f35c6 PP |
10 | |
11 | #include <unistd.h> | |
12 | #include <string.h> | |
13 | #include <inttypes.h> | |
14 | #include <sys/types.h> | |
15 | #include <sys/stat.h> | |
16 | #include <unistd.h> | |
578e048b | 17 | #include "common/assert.h" |
013f35c6 PP |
18 | #include <stdarg.h> |
19 | #include <ctype.h> | |
20 | #include <glib.h> | |
21 | #include <stdlib.h> | |
22 | #include <stdio.h> | |
23 | #include <wchar.h> | |
91d81473 | 24 | #include "common/macros.h" |
578e048b MJ |
25 | #include "common/common.h" |
26 | #include "ctfser/ctfser.h" | |
27 | #include "compat/unistd.h" | |
28 | #include "compat/fcntl.h" | |
013f35c6 PP |
29 | |
30 | static inline | |
86d8b7b8 | 31 | uint64_t get_packet_size_increment_bytes(struct bt_ctfser *ctfser) |
013f35c6 | 32 | { |
86d8b7b8 | 33 | return bt_common_get_page_size(ctfser->log_level) * 8; |
013f35c6 PP |
34 | } |
35 | ||
36 | static inline | |
37 | void mmap_align_ctfser(struct bt_ctfser *ctfser) | |
38 | { | |
9223d1f3 MJ |
39 | ctfser->base_mma = mmap_align(ctfser->cur_packet_size_bytes, |
40 | PROT_READ | PROT_WRITE, | |
86d8b7b8 | 41 | MAP_SHARED, ctfser->fd, ctfser->mmap_offset, ctfser->log_level); |
013f35c6 PP |
42 | } |
43 | ||
013f35c6 PP |
44 | int _bt_ctfser_increase_cur_packet_size(struct bt_ctfser *ctfser) |
45 | { | |
46 | int ret; | |
47 | ||
48 | BT_ASSERT(ctfser); | |
3f7d4d90 | 49 | BT_LOGD("Increasing stream file's current packet size: " |
013f35c6 PP |
50 | "path=\"%s\", fd=%d, " |
51 | "offset-in-cur-packet-bits=%" PRIu64 ", " | |
52 | "cur-packet-size-bytes=%" PRIu64, | |
53 | ctfser->path->str, ctfser->fd, | |
54 | ctfser->offset_in_cur_packet_bits, | |
55 | ctfser->cur_packet_size_bytes); | |
56 | ret = munmap_align(ctfser->base_mma); | |
57 | if (ret) { | |
58 | BT_LOGE_ERRNO("Failed to perform an aligned memory unmapping", | |
59 | ": ret=%d", ret); | |
60 | goto end; | |
61 | } | |
62 | ||
86d8b7b8 PP |
63 | ctfser->cur_packet_size_bytes += get_packet_size_increment_bytes( |
64 | ctfser); | |
013f35c6 PP |
65 | |
66 | do { | |
67 | ret = bt_posix_fallocate(ctfser->fd, ctfser->mmap_offset, | |
68 | ctfser->cur_packet_size_bytes); | |
69 | } while (ret == EINTR); | |
70 | ||
71 | if (ret) { | |
72 | BT_LOGE("Failed to preallocate memory space: ret=%d", ret); | |
73 | goto end; | |
74 | } | |
75 | ||
76 | mmap_align_ctfser(ctfser); | |
77 | if (ctfser->base_mma == MAP_FAILED) { | |
78 | BT_LOGE_ERRNO("Failed to perform an aligned memory mapping", | |
79 | ": ret=%d", ret); | |
80 | ret = -1; | |
81 | goto end; | |
82 | } | |
83 | ||
3f7d4d90 | 84 | BT_LOGD("Increased packet size: " |
013f35c6 PP |
85 | "path=\"%s\", fd=%d, " |
86 | "offset-in-cur-packet-bits=%" PRIu64 ", " | |
87 | "new-packet-size-bytes=%" PRIu64, | |
88 | ctfser->path->str, ctfser->fd, | |
89 | ctfser->offset_in_cur_packet_bits, | |
90 | ctfser->cur_packet_size_bytes); | |
91 | ||
92 | end: | |
93 | return ret; | |
94 | } | |
95 | ||
86d8b7b8 | 96 | int bt_ctfser_init(struct bt_ctfser *ctfser, const char *path, int log_level) |
013f35c6 PP |
97 | { |
98 | int ret = 0; | |
99 | ||
100 | BT_ASSERT(ctfser); | |
101 | memset(ctfser, 0, sizeof(*ctfser)); | |
102 | ctfser->fd = open(path, O_RDWR | O_CREAT | O_TRUNC, | |
103 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
86d8b7b8 | 104 | ctfser->log_level = log_level; |
013f35c6 PP |
105 | if (ctfser->fd < 0) { |
106 | BT_LOGW_ERRNO("Failed to open stream file for writing", | |
107 | ": path=\"%s\", ret=%d", | |
108 | path, ctfser->fd); | |
109 | ret = -1; | |
110 | goto end; | |
111 | } | |
112 | ||
113 | ctfser->path = g_string_new(path); | |
114 | ||
115 | end: | |
116 | return ret; | |
117 | } | |
118 | ||
013f35c6 PP |
119 | int bt_ctfser_fini(struct bt_ctfser *ctfser) |
120 | { | |
121 | int ret = 0; | |
122 | ||
123 | if (ctfser->fd == -1) { | |
124 | goto free_path; | |
125 | } | |
126 | ||
a086573a JR |
127 | if (ctfser->base_mma) { |
128 | /* Unmap old base */ | |
129 | ret = munmap_align(ctfser->base_mma); | |
130 | if (ret) { | |
131 | BT_LOGE_ERRNO("Failed to unmap stream file", | |
132 | ": ret=%d, size-bytes=%" PRIu64, | |
133 | ret, ctfser->stream_size_bytes); | |
134 | goto end; | |
135 | } | |
136 | ||
137 | ctfser->base_mma = NULL; | |
138 | } | |
139 | ||
013f35c6 PP |
140 | /* |
141 | * Truncate the stream file's size to the minimum required to | |
142 | * fit the last packet as we might have grown it too much during | |
143 | * the last memory map. | |
144 | */ | |
145 | do { | |
146 | ret = ftruncate(ctfser->fd, ctfser->stream_size_bytes); | |
147 | } while (ret == -1 && errno == EINTR); | |
148 | ||
149 | if (ret) { | |
150 | BT_LOGE_ERRNO("Failed to truncate stream file", | |
151 | ": ret=%d, size-bytes=%" PRIu64, | |
152 | ret, ctfser->stream_size_bytes); | |
153 | goto end; | |
154 | } | |
155 | ||
013f35c6 PP |
156 | |
157 | ret = close(ctfser->fd); | |
158 | if (ret) { | |
159 | BT_LOGE_ERRNO("Failed to close stream file", | |
160 | ": ret=%d", ret); | |
161 | goto end; | |
162 | } | |
163 | ||
164 | ctfser->fd = -1; | |
165 | ||
166 | free_path: | |
167 | if (ctfser->path) { | |
168 | g_string_free(ctfser->path, TRUE); | |
169 | ctfser->path = NULL; | |
170 | } | |
171 | ||
172 | end: | |
173 | return ret; | |
174 | } | |
175 | ||
013f35c6 PP |
176 | int bt_ctfser_open_packet(struct bt_ctfser *ctfser) |
177 | { | |
178 | int ret = 0; | |
179 | ||
3f7d4d90 | 180 | BT_LOGD("Opening packet: path=\"%s\", fd=%d, " |
013f35c6 PP |
181 | "prev-packet-size-bytes=%" PRIu64, |
182 | ctfser->path->str, ctfser->fd, | |
183 | ctfser->prev_packet_size_bytes); | |
184 | ||
185 | if (ctfser->base_mma) { | |
186 | /* Unmap old base (previous packet) */ | |
187 | ret = munmap_align(ctfser->base_mma); | |
188 | if (ret) { | |
189 | BT_LOGE_ERRNO("Failed to unmap stream file", | |
190 | ": ret=%d, size-bytes=%" PRIu64, | |
191 | ret, ctfser->stream_size_bytes); | |
192 | goto end; | |
193 | } | |
194 | ||
195 | ctfser->base_mma = NULL; | |
196 | } | |
197 | ||
198 | /* | |
199 | * Add the previous packet's size to the memory map address | |
200 | * offset to start writing immediately after it. | |
201 | */ | |
202 | ctfser->mmap_offset += ctfser->prev_packet_size_bytes; | |
203 | ctfser->prev_packet_size_bytes = 0; | |
204 | ||
205 | /* Make initial space for the current packet */ | |
86d8b7b8 PP |
206 | ctfser->cur_packet_size_bytes = get_packet_size_increment_bytes( |
207 | ctfser); | |
013f35c6 PP |
208 | |
209 | do { | |
210 | ret = bt_posix_fallocate(ctfser->fd, ctfser->mmap_offset, | |
211 | ctfser->cur_packet_size_bytes); | |
212 | } while (ret == EINTR); | |
213 | ||
214 | if (ret) { | |
215 | BT_LOGE("Failed to preallocate memory space: ret=%d", ret); | |
216 | goto end; | |
217 | } | |
218 | ||
219 | /* Start writing at the beginning of the current packet */ | |
220 | ctfser->offset_in_cur_packet_bits = 0; | |
221 | ||
222 | /* Get new base address */ | |
223 | mmap_align_ctfser(ctfser); | |
224 | if (ctfser->base_mma == MAP_FAILED) { | |
225 | BT_LOGE_ERRNO("Failed to perform an aligned memory mapping", | |
226 | ": ret=%d", ret); | |
227 | ret = -1; | |
228 | goto end; | |
229 | } | |
230 | ||
3f7d4d90 | 231 | BT_LOGD("Opened packet: path=\"%s\", fd=%d, " |
013f35c6 PP |
232 | "cur-packet-size-bytes=%" PRIu64, |
233 | ctfser->path->str, ctfser->fd, | |
234 | ctfser->cur_packet_size_bytes); | |
235 | ||
236 | end: | |
237 | return ret; | |
238 | } | |
239 | ||
013f35c6 PP |
240 | void bt_ctfser_close_current_packet(struct bt_ctfser *ctfser, |
241 | uint64_t packet_size_bytes) | |
242 | { | |
3f7d4d90 | 243 | BT_LOGD("Closing packet: path=\"%s\", fd=%d, " |
013f35c6 PP |
244 | "offset-in-cur-packet-bits=%" PRIu64 |
245 | "cur-packet-size-bytes=%" PRIu64, | |
246 | ctfser->path->str, ctfser->fd, | |
247 | ctfser->offset_in_cur_packet_bits, | |
248 | ctfser->cur_packet_size_bytes); | |
249 | ||
250 | /* | |
251 | * This will be used during the next call to | |
252 | * bt_ctfser_open_packet(): we add | |
253 | * `ctfser->prev_packet_size_bytes` to the current memory map | |
254 | * address offset (first byte of _this_ packet), effectively | |
255 | * making _this_ packet the required size. | |
256 | */ | |
257 | ctfser->prev_packet_size_bytes = packet_size_bytes; | |
258 | ctfser->stream_size_bytes += packet_size_bytes; | |
3f7d4d90 | 259 | BT_LOGD("Closed packet: path=\"%s\", fd=%d, " |
013f35c6 PP |
260 | "stream-file-size-bytes=%" PRIu64, |
261 | ctfser->path->str, ctfser->fd, | |
262 | ctfser->stream_size_bytes); | |
263 | } |