source: mainline/uspace/srv/vfs/vfs_ipc.c@ c9e3692

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since c9e3692 was ebf1011, checked in by Jakub Jermar <jakub@…>, 8 years ago

Prefer optically less dense code
  • Property mode set to 100644
File size: 8.5 KB
Line 
1/*
2 * Copyright (c) 2008 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "vfs.h"
30
31#include <errno.h>
32#include <stdlib.h>
33#include <str.h>
34#include <vfs/canonify.h>
35
36static void vfs_in_clone(ipc_callid_t rid, ipc_call_t *request)
37{
38 int oldfd = IPC_GET_ARG1(*request);
39 bool desc = IPC_GET_ARG2(*request);
40
41 int ret = vfs_op_clone(oldfd, desc);
42 async_answer_0(rid, ret);
43}
44
45static void vfs_in_close(ipc_callid_t rid, ipc_call_t *request)
46{
47 int fd = IPC_GET_ARG1(*request);
48 int rc = vfs_op_close(fd);
49 async_answer_0(rid, rc);
50}
51
52static void vfs_in_dup(ipc_callid_t rid, ipc_call_t *request)
53{
54 int oldfd = IPC_GET_ARG1(*request);
55 int newfd = IPC_GET_ARG2(*request);
56 int rc = vfs_op_dup(oldfd, newfd);
57 async_answer_1(rid, rc, newfd);
58}
59
60static void vfs_in_fstat(ipc_callid_t rid, ipc_call_t *request)
61{
62 int fd = IPC_GET_ARG1(*request);
63 int rc = vfs_op_fstat(fd);
64 async_answer_0(rid, rc);
65}
66
67static void vfs_in_mount(ipc_callid_t rid, ipc_call_t *request)
68{
69 int mpfd = IPC_GET_ARG1(*request);
70
71 /*
72 * We expect the library to do the device-name to device-handle
73 * translation for us, thus the device handle will arrive as ARG1
74 * in the request.
75 */
76 service_id_t service_id = (service_id_t) IPC_GET_ARG2(*request);
77
78 unsigned int flags = (unsigned int) IPC_GET_ARG3(*request);
79 unsigned int instance = IPC_GET_ARG4(*request);
80
81 char *opts = NULL;
82 char *fs_name = NULL;
83
84 /* Now we expect to receive the mount options. */
85 int rc = async_data_write_accept((void **) &opts, true, 0,
86 MAX_MNTOPTS_LEN, 0, NULL);
87 if (rc != EOK) {
88 async_answer_0(rid, rc);
89 return;
90 }
91
92 /* Now, we expect the client to send us data with the name of the file
93 * system.
94 */
95 rc = async_data_write_accept((void **) &fs_name, true, 0,
96 FS_NAME_MAXLEN, 0, NULL);
97 if (rc != EOK) {
98 free(opts);
99 async_answer_0(rid, rc);
100 return;
101 }
102
103 int outfd = 0;
104 rc = vfs_op_mount(mpfd, service_id, flags, instance, opts, fs_name,
105 &outfd);
106 async_answer_1(rid, rc, outfd);
107
108 free(opts);
109 free(fs_name);
110}
111
112static void vfs_in_open2(ipc_callid_t rid, ipc_call_t *request)
113{
114 int fd = IPC_GET_ARG1(*request);
115 int flags = IPC_GET_ARG2(*request);
116
117 int rc = vfs_op_open2(fd, flags);
118 async_answer_0(rid, rc);
119}
120
121static void vfs_in_read(ipc_callid_t rid, ipc_call_t *request)
122{
123 int fd = IPC_GET_ARG1(*request);
124
125 size_t bytes = 0;
126 int rc = vfs_op_read(fd, &bytes);
127 async_answer_1(rid, rc, bytes);
128}
129
130static void vfs_in_rename(ipc_callid_t rid, ipc_call_t *request)
131{
132 /* The common base directory. */
133 int basefd;
134 char *old = NULL;
135 char *new = NULL;
136 int rc;
137
138 basefd = IPC_GET_ARG1(*request);
139
140 /* Retrieve the old path. */
141 rc = async_data_write_accept((void **) &old, true, 0, 0, 0, NULL);
142 if (rc != EOK)
143 goto out;
144
145 /* Retrieve the new path. */
146 rc = async_data_write_accept((void **) &new, true, 0, 0, 0, NULL);
147 if (rc != EOK)
148 goto out;
149
150 size_t olen;
151 size_t nlen;
152 char *oldc = canonify(old, &olen);
153 char *newc = canonify(new, &nlen);
154
155 if ((!oldc) || (!newc)) {
156 rc = EINVAL;
157 goto out;
158 }
159
160 assert(oldc[olen] == '\0');
161 assert(newc[nlen] == '\0');
162
163 rc = vfs_op_rename(basefd, oldc, newc);
164
165out:
166 async_answer_0(rid, rc);
167
168 if (old)
169 free(old);
170 if (new)
171 free(new);
172}
173
174static void vfs_in_seek(ipc_callid_t rid, ipc_call_t *request)
175{
176 int fd = (int) IPC_GET_ARG1(*request);
177 int64_t off = (int64_t) MERGE_LOUP32(IPC_GET_ARG2(*request), IPC_GET_ARG3(*request));
178 int whence = (int) IPC_GET_ARG4(*request);
179
180 int64_t new_offset = 0;
181 int rc = vfs_op_seek(fd, off, whence, &new_offset);
182 async_answer_2(rid, rc, LOWER32(new_offset), UPPER32(new_offset));
183}
184
185static void vfs_in_statfs(ipc_callid_t rid, ipc_call_t *request)
186{
187 int fd = (int) IPC_GET_ARG1(*request);
188
189 int rc = vfs_op_statfs(fd);
190 async_answer_0(rid, rc);
191}
192
193static void vfs_in_sync(ipc_callid_t rid, ipc_call_t *request)
194{
195 int fd = IPC_GET_ARG1(*request);
196 int rc = vfs_op_sync(fd);
197 async_answer_0(rid, rc);
198}
199
200static void vfs_in_truncate(ipc_callid_t rid, ipc_call_t *request)
201{
202 int fd = IPC_GET_ARG1(*request);
203 int64_t size = MERGE_LOUP32(IPC_GET_ARG2(*request), IPC_GET_ARG3(*request));
204 int rc = vfs_op_truncate(fd, size);
205 async_answer_0(rid, rc);
206}
207
208static void vfs_in_unlink2(ipc_callid_t rid, ipc_call_t *request)
209{
210 int parentfd = IPC_GET_ARG1(*request);
211 int expectfd = IPC_GET_ARG2(*request);
212 int wflag = IPC_GET_ARG3(*request);
213
214 char *path;
215 int rc = async_data_write_accept((void **) &path, true, 0, 0, 0, NULL);
216 if (rc == EOK)
217 rc = vfs_op_unlink2(parentfd, expectfd, wflag, path);
218
219 async_answer_0(rid, rc);
220}
221
222static void vfs_in_unmount(ipc_callid_t rid, ipc_call_t *request)
223{
224 int mpfd = IPC_GET_ARG1(*request);
225 int rc = vfs_op_unmount(mpfd);
226 async_answer_0(rid, rc);
227}
228
229static void vfs_in_wait_handle(ipc_callid_t rid, ipc_call_t *request)
230{
231 bool high_fd = IPC_GET_ARG1(*request);
232 int fd = vfs_op_wait_handle(high_fd);
233 async_answer_1(rid, EOK, fd);
234}
235
236static void vfs_in_walk(ipc_callid_t rid, ipc_call_t *request)
237{
238 /*
239 * Parent is our relative root for file lookup.
240 * For defined flags, see <ipc/vfs.h>.
241 */
242 int parentfd = IPC_GET_ARG1(*request);
243 int flags = IPC_GET_ARG2(*request);
244
245 int fd = 0;
246 char *path;
247 int rc = async_data_write_accept((void **)&path, true, 0, 0, 0, NULL);
248 if (rc == EOK) {
249 rc = vfs_op_walk(parentfd, flags, path, &fd);
250 free(path);
251 }
252 async_answer_1(rid, rc, fd);
253}
254
255static void vfs_in_write(ipc_callid_t rid, ipc_call_t *request)
256{
257 int fd = IPC_GET_ARG1(*request);
258
259 size_t bytes = 0;
260 int rc = vfs_op_write(fd, &bytes);
261 async_answer_1(rid, rc, bytes);
262}
263
264void vfs_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
265{
266 bool cont = true;
267
268 /*
269 * The connection was opened via the IPC_CONNECT_ME_TO call.
270 * This call needs to be answered.
271 */
272 async_answer_0(iid, EOK);
273
274 while (cont) {
275 ipc_call_t call;
276 ipc_callid_t callid = async_get_call(&call);
277
278 if (!IPC_GET_IMETHOD(call))
279 break;
280
281 switch (IPC_GET_IMETHOD(call)) {
282 case VFS_IN_CLONE:
283 vfs_in_clone(callid, &call);
284 break;
285 case VFS_IN_CLOSE:
286 vfs_in_close(callid, &call);
287 break;
288 case VFS_IN_DUP:
289 vfs_in_dup(callid, &call);
290 break;
291 case VFS_IN_FSTAT:
292 vfs_in_fstat(callid, &call);
293 break;
294 case VFS_IN_MOUNT:
295 vfs_in_mount(callid, &call);
296 break;
297 case VFS_IN_OPEN2:
298 vfs_in_open2(callid, &call);
299 break;
300 case VFS_IN_READ:
301 vfs_in_read(callid, &call);
302 break;
303 case VFS_IN_REGISTER:
304 vfs_register(callid, &call);
305 cont = false;
306 break;
307 case VFS_IN_RENAME:
308 vfs_in_rename(callid, &call);
309 break;
310 case VFS_IN_SEEK:
311 vfs_in_seek(callid, &call);
312 break;
313 case VFS_IN_STATFS:
314 vfs_in_statfs(callid, &call);
315 break;
316 case VFS_IN_SYNC:
317 vfs_in_sync(callid, &call);
318 break;
319 case VFS_IN_TRUNCATE:
320 vfs_in_truncate(callid, &call);
321 break;
322 case VFS_IN_UNLINK2:
323 vfs_in_unlink2(callid, &call);
324 break;
325 case VFS_IN_UNMOUNT:
326 vfs_in_unmount(callid, &call);
327 break;
328 case VFS_IN_WAIT_HANDLE:
329 vfs_in_wait_handle(callid, &call);
330 break;
331 case VFS_IN_WALK:
332 vfs_in_walk(callid, &call);
333 break;
334 case VFS_IN_WRITE:
335 vfs_in_write(callid, &call);
336 break;
337 default:
338 async_answer_0(callid, ENOTSUP);
339 break;
340 }
341 }
342
343 /*
344 * Open files for this client will be cleaned up when its last
345 * connection fibril terminates.
346 */
347}
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