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1 | /*- |
2 | * BSD LICENSE | |
3 | * | |
4 | * Copyright (c) Intel Corporation. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * * Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * * Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in | |
15 | * the documentation and/or other materials provided with the | |
16 | * distribution. | |
17 | * * Neither the name of Intel Corporation nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
22 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
24 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
25 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | */ | |
33 | #define FUSE_USE_VERSION 30 | |
34 | ||
35 | #include "fuse3/fuse.h" | |
36 | #include "fuse3/fuse_lowlevel.h" | |
37 | ||
38 | #include <stdlib.h> | |
39 | #include <unistd.h> | |
40 | #include <errno.h> | |
41 | #include <stdio.h> | |
42 | #include <string.h> | |
43 | #include <pthread.h> | |
44 | #include <stdbool.h> | |
45 | #include <signal.h> | |
46 | ||
47 | #include "spdk/blobfs.h" | |
48 | #include "spdk/bdev.h" | |
49 | #include "spdk/event.h" | |
50 | #include "spdk/io_channel.h" | |
51 | #include "spdk/blob_bdev.h" | |
52 | #include "spdk/log.h" | |
53 | ||
54 | struct fuse *g_fuse; | |
55 | char *g_bdev_name; | |
56 | char *g_mountpoint; | |
57 | pthread_t g_fuse_thread; | |
58 | ||
59 | struct spdk_bs_dev *g_bs_dev; | |
60 | struct spdk_filesystem *g_fs; | |
61 | struct spdk_io_channel *g_channel; | |
62 | struct spdk_file *g_file; | |
63 | int g_fserrno; | |
64 | int g_fuse_argc = 0; | |
65 | char **g_fuse_argv = NULL; | |
66 | ||
67 | static void | |
68 | __call_fn(void *arg1, void *arg2) | |
69 | { | |
70 | fs_request_fn fn; | |
71 | ||
72 | fn = (fs_request_fn)arg1; | |
73 | fn(arg2); | |
74 | } | |
75 | ||
76 | static void | |
77 | __send_request(fs_request_fn fn, void *arg) | |
78 | { | |
79 | struct spdk_event *event; | |
80 | ||
81 | event = spdk_event_allocate(0, __call_fn, (void *)fn, arg); | |
82 | spdk_event_call(event); | |
83 | } | |
84 | ||
85 | static int | |
86 | spdk_fuse_getattr(const char *path, struct stat *stbuf, struct fuse_file_info *fi) | |
87 | { | |
88 | struct spdk_file_stat stat; | |
89 | int rc; | |
90 | ||
91 | if (!strcmp(path, "/")) { | |
92 | stbuf->st_mode = S_IFDIR | 0755; | |
93 | stbuf->st_nlink = 2; | |
94 | return 0; | |
95 | } | |
96 | ||
97 | rc = spdk_fs_file_stat(g_fs, g_channel, &path[1], &stat); | |
98 | if (rc == 0) { | |
99 | stbuf->st_mode = S_IFREG | 0644; | |
100 | stbuf->st_nlink = 1; | |
101 | stbuf->st_size = stat.size; | |
102 | } | |
103 | ||
104 | return rc; | |
105 | } | |
106 | ||
107 | static int | |
108 | spdk_fuse_readdir(const char *path, void *buf, fuse_fill_dir_t filler, | |
109 | off_t offset, struct fuse_file_info *fi, | |
110 | enum fuse_readdir_flags flags) | |
111 | { | |
112 | struct spdk_file *file; | |
113 | const char *filename; | |
114 | spdk_fs_iter iter; | |
115 | ||
116 | filler(buf, ".", NULL, 0, 0); | |
117 | filler(buf, "..", NULL, 0, 0); | |
118 | ||
119 | iter = spdk_fs_iter_first(g_fs); | |
120 | while (iter != NULL) { | |
121 | file = spdk_fs_iter_get_file(iter); | |
122 | iter = spdk_fs_iter_next(iter); | |
123 | filename = spdk_file_get_name(file); | |
124 | filler(buf, filename, NULL, 0, 0); | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static int | |
131 | spdk_fuse_mknod(const char *path, mode_t mode, dev_t rdev) | |
132 | { | |
133 | return spdk_fs_create_file(g_fs, g_channel, &path[1]); | |
134 | } | |
135 | ||
136 | static int | |
137 | spdk_fuse_unlink(const char *path) | |
138 | { | |
139 | return spdk_fs_delete_file(g_fs, g_channel, &path[1]); | |
140 | } | |
141 | ||
142 | static int | |
143 | spdk_fuse_truncate(const char *path, off_t size, struct fuse_file_info *fi) | |
144 | { | |
145 | struct spdk_file *file; | |
146 | int rc; | |
147 | ||
148 | rc = spdk_fs_open_file(g_fs, g_channel, &path[1], 0, &file); | |
149 | if (rc != 0) { | |
150 | return -rc; | |
151 | } | |
152 | ||
153 | spdk_file_truncate(file, g_channel, size); | |
154 | spdk_file_close(file, g_channel); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static int | |
160 | spdk_fuse_utimens(const char *path, const struct timespec tv[2], struct fuse_file_info *fi) | |
161 | { | |
162 | return 0; | |
163 | } | |
164 | ||
165 | static int | |
166 | spdk_fuse_open(const char *path, struct fuse_file_info *info) | |
167 | { | |
168 | struct spdk_file *file; | |
169 | int rc; | |
170 | ||
171 | rc = spdk_fs_open_file(g_fs, g_channel, &path[1], 0, &file); | |
172 | if (rc != 0) { | |
173 | return -rc; | |
174 | } | |
175 | ||
176 | info->fh = (uintptr_t)file; | |
177 | return 0; | |
178 | } | |
179 | ||
180 | static int | |
181 | spdk_fuse_release(const char *path, struct fuse_file_info *info) | |
182 | { | |
183 | struct spdk_file *file = (struct spdk_file *)info->fh; | |
184 | ||
185 | return spdk_file_close(file, g_channel); | |
186 | } | |
187 | ||
188 | static int | |
189 | spdk_fuse_read(const char *path, char *buf, size_t len, off_t offset, struct fuse_file_info *info) | |
190 | { | |
191 | struct spdk_file *file = (struct spdk_file *)info->fh; | |
192 | ||
193 | return spdk_file_read(file, g_channel, buf, offset, len); | |
194 | } | |
195 | ||
196 | static int | |
197 | spdk_fuse_write(const char *path, const char *buf, size_t len, off_t offset, | |
198 | struct fuse_file_info *info) | |
199 | { | |
200 | struct spdk_file *file = (struct spdk_file *)info->fh; | |
201 | int rc; | |
202 | ||
203 | rc = spdk_file_write(file, g_channel, (void *)buf, offset, len); | |
204 | if (rc == 0) { | |
205 | return len; | |
206 | } else { | |
207 | return rc; | |
208 | } | |
209 | } | |
210 | ||
211 | static int | |
212 | spdk_fuse_flush(const char *path, struct fuse_file_info *info) | |
213 | { | |
214 | return 0; | |
215 | } | |
216 | ||
217 | static int | |
218 | spdk_fuse_fsync(const char *path, int datasync, struct fuse_file_info *info) | |
219 | { | |
220 | return 0; | |
221 | } | |
222 | ||
223 | static int | |
224 | spdk_fuse_rename(const char *old_path, const char *new_path, unsigned int flags) | |
225 | { | |
226 | return spdk_fs_rename_file(g_fs, g_channel, &old_path[1], &new_path[1]); | |
227 | } | |
228 | ||
229 | static struct fuse_operations spdk_fuse_oper = { | |
230 | .getattr = spdk_fuse_getattr, | |
231 | .readdir = spdk_fuse_readdir, | |
232 | .mknod = spdk_fuse_mknod, | |
233 | .unlink = spdk_fuse_unlink, | |
234 | .truncate = spdk_fuse_truncate, | |
235 | .utimens = spdk_fuse_utimens, | |
236 | .open = spdk_fuse_open, | |
237 | .release = spdk_fuse_release, | |
238 | .read = spdk_fuse_read, | |
239 | .write = spdk_fuse_write, | |
240 | .flush = spdk_fuse_flush, | |
241 | .fsync = spdk_fuse_fsync, | |
242 | .rename = spdk_fuse_rename, | |
243 | }; | |
244 | ||
245 | static void | |
246 | construct_targets(void) | |
247 | { | |
248 | struct spdk_bdev *bdev; | |
249 | ||
250 | bdev = spdk_bdev_get_by_name(g_bdev_name); | |
251 | if (bdev == NULL) { | |
252 | SPDK_ERRLOG("bdev %s not found\n", g_bdev_name); | |
253 | exit(1); | |
254 | } | |
255 | ||
256 | if (!spdk_bdev_claim(bdev, NULL, NULL)) { | |
257 | SPDK_ERRLOG("could not claim bdev %s\n", bdev->name); | |
258 | exit(1); | |
259 | } | |
260 | ||
261 | g_bs_dev = spdk_bdev_create_bs_dev(bdev); | |
262 | ||
263 | printf("Mounting BlobFS on bdev %s\n", bdev->name); | |
264 | } | |
265 | ||
266 | static void | |
267 | start_fuse_fn(void *arg1, void *arg2) | |
268 | { | |
269 | struct fuse_args args = FUSE_ARGS_INIT(g_fuse_argc, g_fuse_argv); | |
270 | int rc; | |
271 | struct fuse_cmdline_opts opts = {}; | |
272 | ||
273 | g_fuse_thread = pthread_self(); | |
274 | rc = fuse_parse_cmdline(&args, &opts); | |
275 | if (rc != 0) { | |
276 | spdk_app_stop(-1); | |
277 | fuse_opt_free_args(&args); | |
278 | return; | |
279 | } | |
280 | g_fuse = fuse_new(&args, &spdk_fuse_oper, sizeof(spdk_fuse_oper), NULL); | |
281 | fuse_opt_free_args(&args); | |
282 | ||
283 | rc = fuse_mount(g_fuse, g_mountpoint); | |
284 | if (rc != 0) { | |
285 | spdk_app_stop(-1); | |
286 | return; | |
287 | } | |
288 | ||
289 | fuse_daemonize(true /* true = run in foreground */); | |
290 | ||
291 | fuse_loop(g_fuse); | |
292 | ||
293 | fuse_unmount(g_fuse); | |
294 | fuse_destroy(g_fuse); | |
295 | } | |
296 | ||
297 | static void | |
298 | init_cb(void *ctx, struct spdk_filesystem *fs, int fserrno) | |
299 | { | |
300 | struct spdk_event *event; | |
301 | ||
302 | g_fs = fs; | |
303 | g_channel = spdk_fs_alloc_io_channel_sync(g_fs, SPDK_IO_PRIORITY_DEFAULT); | |
304 | event = spdk_event_allocate(1, start_fuse_fn, NULL, NULL); | |
305 | spdk_event_call(event); | |
306 | } | |
307 | ||
308 | static void | |
309 | spdk_fuse_run(void *arg1, void *arg2) | |
310 | { | |
311 | construct_targets(); | |
312 | spdk_fs_load(g_bs_dev, __send_request, init_cb, NULL); | |
313 | } | |
314 | ||
315 | static void | |
316 | shutdown_cb(void *ctx, int fserrno) | |
317 | { | |
318 | fuse_session_exit(fuse_get_session(g_fuse)); | |
319 | pthread_kill(g_fuse_thread, SIGINT); | |
320 | spdk_fs_free_io_channel(g_channel); | |
321 | spdk_app_stop(0); | |
322 | } | |
323 | ||
324 | static void | |
325 | spdk_fuse_shutdown(void) | |
326 | { | |
327 | spdk_fs_unload(g_fs, shutdown_cb, NULL); | |
328 | } | |
329 | ||
330 | int main(int argc, char **argv) | |
331 | { | |
332 | struct spdk_app_opts opts = {}; | |
333 | ||
334 | if (argc < 4) { | |
335 | fprintf(stderr, "usage: %s <conffile> <bdev name> <mountpoint>\n", argv[0]); | |
336 | exit(1); | |
337 | } | |
338 | ||
339 | spdk_app_opts_init(&opts); | |
340 | opts.name = "spdk_fuse"; | |
341 | opts.config_file = argv[1]; | |
342 | opts.reactor_mask = "0x3"; | |
343 | opts.dpdk_mem_size = 6144; | |
344 | opts.shutdown_cb = spdk_fuse_shutdown; | |
345 | spdk_app_init(&opts); | |
346 | ||
347 | g_bdev_name = argv[2]; | |
348 | g_mountpoint = argv[3]; | |
349 | g_fuse_argc = argc - 2; | |
350 | g_fuse_argv = &argv[2]; | |
351 | ||
352 | spdk_app_start(spdk_fuse_run, NULL, NULL); | |
353 | spdk_app_fini(); | |
354 | ||
355 | return 0; | |
356 | } |