source: mainline/uspace/srv/vfs/vfs_ipc.c@ 58898d1d

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 58898d1d was 58898d1d, checked in by Jakub Jermar <jakub@…>, 8 years ago

Remove VFS_IN_SEEK from VFS
  • Property mode set to 100644
File size: 8.2 KB
RevLine 
[0d35511]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);
[55a7fee]63 int rc = vfs_op_fstat(fd);
[0d35511]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);
[58898d1d]124 aoff64_t pos = MERGE_LOUP32(IPC_GET_ARG2(*request),
125 IPC_GET_ARG3(*request));
[0d35511]126
127 size_t bytes = 0;
[58898d1d]128 int rc = vfs_op_read(fd, pos, &bytes);
[0d35511]129 async_answer_1(rid, rc, bytes);
130}
131
132static void vfs_in_rename(ipc_callid_t rid, ipc_call_t *request)
133{
134 /* The common base directory. */
135 int basefd;
136 char *old = NULL;
137 char *new = NULL;
138 int rc;
139
140 basefd = IPC_GET_ARG1(*request);
141
142 /* Retrieve the old path. */
143 rc = async_data_write_accept((void **) &old, true, 0, 0, 0, NULL);
[ebf1011]144 if (rc != EOK)
[0d35511]145 goto out;
146
147 /* Retrieve the new path. */
148 rc = async_data_write_accept((void **) &new, true, 0, 0, 0, NULL);
[ebf1011]149 if (rc != EOK)
[0d35511]150 goto out;
151
152 size_t olen;
153 size_t nlen;
154 char *oldc = canonify(old, &olen);
155 char *newc = canonify(new, &nlen);
156
157 if ((!oldc) || (!newc)) {
158 rc = EINVAL;
159 goto out;
160 }
161
162 assert(oldc[olen] == '\0');
163 assert(newc[nlen] == '\0');
164
165 rc = vfs_op_rename(basefd, oldc, newc);
166
167out:
168 async_answer_0(rid, rc);
169
[ebf1011]170 if (old)
[0d35511]171 free(old);
[ebf1011]172 if (new)
[0d35511]173 free(new);
174}
175
176static void vfs_in_statfs(ipc_callid_t rid, ipc_call_t *request)
177{
178 int fd = (int) IPC_GET_ARG1(*request);
179
180 int rc = vfs_op_statfs(fd);
181 async_answer_0(rid, rc);
182}
183
184static void vfs_in_sync(ipc_callid_t rid, ipc_call_t *request)
185{
186 int fd = IPC_GET_ARG1(*request);
187 int rc = vfs_op_sync(fd);
188 async_answer_0(rid, rc);
189}
190
191static void vfs_in_truncate(ipc_callid_t rid, ipc_call_t *request)
192{
193 int fd = IPC_GET_ARG1(*request);
194 int64_t size = MERGE_LOUP32(IPC_GET_ARG2(*request), IPC_GET_ARG3(*request));
195 int rc = vfs_op_truncate(fd, size);
196 async_answer_0(rid, rc);
197}
198
199static void vfs_in_unlink2(ipc_callid_t rid, ipc_call_t *request)
200{
201 int parentfd = IPC_GET_ARG1(*request);
202 int expectfd = IPC_GET_ARG2(*request);
203 int wflag = IPC_GET_ARG3(*request);
204
205 char *path;
206 int rc = async_data_write_accept((void **) &path, true, 0, 0, 0, NULL);
[ebf1011]207 if (rc == EOK)
[0d35511]208 rc = vfs_op_unlink2(parentfd, expectfd, wflag, path);
209
210 async_answer_0(rid, rc);
211}
212
213static void vfs_in_unmount(ipc_callid_t rid, ipc_call_t *request)
214{
215 int mpfd = IPC_GET_ARG1(*request);
216 int rc = vfs_op_unmount(mpfd);
217 async_answer_0(rid, rc);
218}
219
220static void vfs_in_wait_handle(ipc_callid_t rid, ipc_call_t *request)
221{
222 bool high_fd = IPC_GET_ARG1(*request);
223 int fd = vfs_op_wait_handle(high_fd);
224 async_answer_1(rid, EOK, fd);
225}
226
227static void vfs_in_walk(ipc_callid_t rid, ipc_call_t *request)
228{
229 /*
230 * Parent is our relative root for file lookup.
231 * For defined flags, see <ipc/vfs.h>.
232 */
233 int parentfd = IPC_GET_ARG1(*request);
234 int flags = IPC_GET_ARG2(*request);
235
236 int fd = 0;
237 char *path;
238 int rc = async_data_write_accept((void **)&path, true, 0, 0, 0, NULL);
239 if (rc == EOK) {
240 rc = vfs_op_walk(parentfd, flags, path, &fd);
241 free(path);
242 }
243 async_answer_1(rid, rc, fd);
244}
245
246static void vfs_in_write(ipc_callid_t rid, ipc_call_t *request)
247{
248 int fd = IPC_GET_ARG1(*request);
[58898d1d]249 aoff64_t pos = MERGE_LOUP32(IPC_GET_ARG2(*request),
250 IPC_GET_ARG3(*request));
[0d35511]251
252 size_t bytes = 0;
[58898d1d]253 int rc = vfs_op_write(fd, pos, &bytes);
[0d35511]254 async_answer_1(rid, rc, bytes);
255}
256
257void vfs_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
258{
259 bool cont = true;
260
261 /*
262 * The connection was opened via the IPC_CONNECT_ME_TO call.
263 * This call needs to be answered.
264 */
265 async_answer_0(iid, EOK);
266
267 while (cont) {
268 ipc_call_t call;
269 ipc_callid_t callid = async_get_call(&call);
270
271 if (!IPC_GET_IMETHOD(call))
272 break;
273
274 switch (IPC_GET_IMETHOD(call)) {
275 case VFS_IN_CLONE:
276 vfs_in_clone(callid, &call);
277 break;
278 case VFS_IN_CLOSE:
279 vfs_in_close(callid, &call);
280 break;
281 case VFS_IN_DUP:
282 vfs_in_dup(callid, &call);
283 break;
284 case VFS_IN_FSTAT:
285 vfs_in_fstat(callid, &call);
286 break;
287 case VFS_IN_MOUNT:
288 vfs_in_mount(callid, &call);
289 break;
290 case VFS_IN_OPEN2:
291 vfs_in_open2(callid, &call);
292 break;
293 case VFS_IN_READ:
294 vfs_in_read(callid, &call);
295 break;
296 case VFS_IN_REGISTER:
297 vfs_register(callid, &call);
298 cont = false;
299 break;
300 case VFS_IN_RENAME:
301 vfs_in_rename(callid, &call);
302 break;
303 case VFS_IN_STATFS:
304 vfs_in_statfs(callid, &call);
305 break;
306 case VFS_IN_SYNC:
307 vfs_in_sync(callid, &call);
308 break;
309 case VFS_IN_TRUNCATE:
310 vfs_in_truncate(callid, &call);
311 break;
312 case VFS_IN_UNLINK2:
313 vfs_in_unlink2(callid, &call);
314 break;
315 case VFS_IN_UNMOUNT:
316 vfs_in_unmount(callid, &call);
317 break;
318 case VFS_IN_WAIT_HANDLE:
319 vfs_in_wait_handle(callid, &call);
320 break;
321 case VFS_IN_WALK:
322 vfs_in_walk(callid, &call);
323 break;
324 case VFS_IN_WRITE:
325 vfs_in_write(callid, &call);
326 break;
327 default:
328 async_answer_0(callid, ENOTSUP);
329 break;
330 }
331 }
332
333 /*
334 * Open files for this client will be cleaned up when its last
335 * connection fibril terminates.
336 */
337}
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