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e98a2d6e PP |
1 | /* |
2 | * Copyright 2016 - Philippe Proulx <pproulx@efficios.com> | |
fc9a526c | 3 | * Copyright 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
e98a2d6e PP |
4 | * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation |
5 | * | |
e98a2d6e PP |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
22 | * SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include <stdio.h> | |
26 | #include <stdint.h> | |
27 | #include <stdlib.h> | |
28 | #include <stdbool.h> | |
29 | #include <glib.h> | |
30 | #include <inttypes.h> | |
31 | #include <sys/mman.h> | |
32 | #include <babeltrace/ctf-ir/stream.h> | |
78586d8a JG |
33 | #include <babeltrace/plugin/notification/iterator.h> |
34 | #include "file.h" | |
35 | #include "metadata.h" | |
36 | #include "../common/notif-iter/notif-iter.h" | |
37 | #include <assert.h> | |
5b29e799 | 38 | #include "data-stream.h" |
e98a2d6e PP |
39 | |
40 | #define PRINT_ERR_STREAM ctf_fs->error_fp | |
41 | #define PRINT_PREFIX "ctf-fs-data-stream" | |
42 | #include "print.h" | |
43 | ||
5b29e799 JG |
44 | static |
45 | size_t remaining_mmap_bytes(struct ctf_fs_stream *stream) | |
e98a2d6e | 46 | { |
fc9a526c | 47 | return stream->mmap_valid_len - stream->request_offset; |
e98a2d6e PP |
48 | } |
49 | ||
5b29e799 JG |
50 | static |
51 | int stream_munmap(struct ctf_fs_stream *stream) | |
e98a2d6e | 52 | { |
fc9a526c | 53 | int ret = 0; |
56a1cced | 54 | struct ctf_fs_component *ctf_fs = stream->file->ctf_fs; |
e98a2d6e PP |
55 | |
56 | if (munmap(stream->mmap_addr, stream->mmap_len)) { | |
57 | PERR("Cannot memory-unmap address %p (size %zu) of file \"%s\" (%p): %s\n", | |
58 | stream->mmap_addr, stream->mmap_len, | |
59 | stream->file->path->str, stream->file->fp, | |
60 | strerror(errno)); | |
fc9a526c JG |
61 | ret = -1; |
62 | goto end; | |
e98a2d6e | 63 | } |
fc9a526c JG |
64 | end: |
65 | return ret; | |
e98a2d6e PP |
66 | } |
67 | ||
5b29e799 JG |
68 | static |
69 | int mmap_next(struct ctf_fs_stream *stream) | |
e98a2d6e | 70 | { |
e98a2d6e | 71 | int ret = 0; |
fc9a526c | 72 | struct ctf_fs_component *ctf_fs = stream->file->ctf_fs; |
e98a2d6e PP |
73 | |
74 | /* Unmap old region */ | |
75 | if (stream->mmap_addr) { | |
76 | if (stream_munmap(stream)) { | |
77 | goto error; | |
78 | } | |
79 | ||
fc9a526c JG |
80 | stream->mmap_offset += stream->mmap_valid_len; |
81 | stream->request_offset = 0; | |
e98a2d6e PP |
82 | } |
83 | ||
fc9a526c JG |
84 | stream->mmap_valid_len = MIN(stream->file->size - stream->mmap_offset, |
85 | stream->mmap_max_len); | |
86 | /* Round up to next page, assuming page size being a power of 2. */ | |
87 | stream->mmap_len = (stream->mmap_valid_len + ctf_fs->page_size - 1) | |
88 | & ~(ctf_fs->page_size - 1); | |
e98a2d6e PP |
89 | /* Map new region */ |
90 | stream->mmap_addr = mmap((void *) 0, stream->mmap_len, | |
78586d8a JG |
91 | PROT_READ, MAP_PRIVATE, fileno(stream->file->fp), |
92 | stream->mmap_offset); | |
e98a2d6e PP |
93 | if (stream->mmap_addr == MAP_FAILED) { |
94 | PERR("Cannot memory-map address (size %zu) of file \"%s\" (%p) at offset %zu: %s\n", | |
78586d8a JG |
95 | stream->mmap_len, stream->file->path->str, |
96 | stream->file->fp, stream->mmap_offset, | |
97 | strerror(errno)); | |
e98a2d6e PP |
98 | goto error; |
99 | } | |
100 | ||
101 | goto end; | |
e98a2d6e PP |
102 | error: |
103 | stream_munmap(stream); | |
104 | ret = -1; | |
e98a2d6e PP |
105 | end: |
106 | return ret; | |
107 | } | |
108 | ||
5b29e799 JG |
109 | static |
110 | enum bt_ctf_notif_iter_medium_status medop_request_bytes( | |
e98a2d6e PP |
111 | size_t request_sz, uint8_t **buffer_addr, |
112 | size_t *buffer_sz, void *data) | |
113 | { | |
114 | enum bt_ctf_notif_iter_medium_status status = | |
115 | BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK; | |
116 | struct ctf_fs_stream *stream = data; | |
56a1cced | 117 | struct ctf_fs_component *ctf_fs = stream->file->ctf_fs; |
e98a2d6e PP |
118 | |
119 | if (request_sz == 0) { | |
120 | goto end; | |
121 | } | |
122 | ||
e98a2d6e PP |
123 | /* Check if we have at least one memory-mapped byte left */ |
124 | if (remaining_mmap_bytes(stream) == 0) { | |
125 | /* Are we at the end of the file? */ | |
fc9a526c | 126 | if (stream->request_offset >= stream->file->size) { |
e98a2d6e PP |
127 | PDBG("Reached end of file \"%s\" (%p)\n", |
128 | stream->file->path->str, stream->file->fp); | |
129 | status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF; | |
130 | goto end; | |
131 | } | |
132 | ||
133 | if (mmap_next(stream)) { | |
134 | PERR("Cannot memory-map next region of file \"%s\" (%p)\n", | |
135 | stream->file->path->str, stream->file->fp); | |
136 | goto error; | |
137 | } | |
138 | } | |
139 | ||
140 | *buffer_sz = MIN(remaining_mmap_bytes(stream), request_sz); | |
fc9a526c | 141 | *buffer_addr = ((uint8_t *) stream->mmap_addr) + stream->request_offset; |
e98a2d6e PP |
142 | stream->request_offset += *buffer_sz; |
143 | goto end; | |
144 | ||
145 | error: | |
146 | status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR; | |
147 | ||
148 | end: | |
149 | return status; | |
150 | } | |
151 | ||
5b29e799 JG |
152 | static |
153 | struct bt_ctf_stream *medop_get_stream( | |
e98a2d6e PP |
154 | struct bt_ctf_stream_class *stream_class, void *data) |
155 | { | |
156 | struct ctf_fs_stream *fs_stream = data; | |
56a1cced | 157 | struct ctf_fs_component *ctf_fs = fs_stream->file->ctf_fs; |
e98a2d6e PP |
158 | |
159 | if (!fs_stream->stream) { | |
160 | int64_t id = bt_ctf_stream_class_get_id(stream_class); | |
161 | ||
162 | PDBG("Creating stream out of stream class %" PRId64 "\n", id); | |
163 | fs_stream->stream = bt_ctf_stream_create(stream_class, | |
fc9a526c | 164 | fs_stream->file->path->str); |
e98a2d6e PP |
165 | if (!fs_stream->stream) { |
166 | PERR("Cannot create stream (stream class %" PRId64 ")\n", | |
fc9a526c | 167 | id); |
e98a2d6e PP |
168 | } |
169 | } | |
170 | ||
171 | return fs_stream->stream; | |
172 | } | |
173 | ||
174 | static struct bt_ctf_notif_iter_medium_ops medops = { | |
175 | .request_bytes = medop_request_bytes, | |
176 | .get_stream = medop_get_stream, | |
177 | }; | |
178 | ||
e7a4393b JG |
179 | BT_HIDDEN |
180 | struct ctf_fs_stream *ctf_fs_stream_create( | |
56a1cced | 181 | struct ctf_fs_component *ctf_fs, struct ctf_fs_file *file) |
e98a2d6e PP |
182 | { |
183 | struct ctf_fs_stream *stream = g_new0(struct ctf_fs_stream, 1); | |
184 | ||
185 | if (!stream) { | |
186 | goto error; | |
187 | } | |
188 | ||
189 | stream->file = file; | |
5b29e799 | 190 | stream->notif_iter = bt_ctf_notif_iter_create(ctf_fs->metadata->trace, |
e7a4393b | 191 | ctf_fs->page_size, medops, stream, ctf_fs->error_fp); |
e98a2d6e PP |
192 | if (!stream->notif_iter) { |
193 | goto error; | |
194 | } | |
5b29e799 | 195 | |
fc9a526c | 196 | stream->mmap_max_len = ctf_fs->page_size * 2048; |
e98a2d6e | 197 | goto end; |
e98a2d6e | 198 | error: |
78586d8a | 199 | /* Do not touch "borrowed" file. */ |
e98a2d6e PP |
200 | stream->file = NULL; |
201 | ctf_fs_stream_destroy(stream); | |
202 | stream = NULL; | |
e98a2d6e PP |
203 | end: |
204 | return stream; | |
205 | } | |
206 | ||
5b29e799 JG |
207 | BT_HIDDEN |
208 | void ctf_fs_stream_destroy(struct ctf_fs_stream *stream) | |
e98a2d6e | 209 | { |
5b29e799 JG |
210 | if (!stream) { |
211 | return; | |
043e2020 JG |
212 | } |
213 | ||
5b29e799 JG |
214 | if (stream->file) { |
215 | ctf_fs_file_destroy(stream->file); | |
e98a2d6e PP |
216 | } |
217 | ||
5b29e799 JG |
218 | if (stream->stream) { |
219 | BT_PUT(stream->stream); | |
043e2020 | 220 | } |
5b29e799 JG |
221 | |
222 | if (stream->notif_iter) { | |
223 | bt_ctf_notif_iter_destroy(stream->notif_iter); | |
78586d8a | 224 | } |
5b29e799 JG |
225 | |
226 | g_free(stream); | |
e98a2d6e | 227 | } |