Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ioctl.c | |
3 | * | |
4 | * Copyright (C) 1995, 1996 by Volker Lendecke | |
5 | * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache | |
6 | * Modified 1998, 1999 Wolfram Pienkoss for NLS | |
7 | * | |
8 | */ | |
9 | ||
10 | #include <linux/config.h> | |
11 | ||
12 | #include <asm/uaccess.h> | |
16f7e0fe | 13 | #include <linux/capability.h> |
1da177e4 LT |
14 | #include <linux/errno.h> |
15 | #include <linux/fs.h> | |
16 | #include <linux/ioctl.h> | |
17 | #include <linux/time.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/highuid.h> | |
20 | #include <linux/vmalloc.h> | |
21 | ||
22 | #include <linux/ncp_fs.h> | |
23 | ||
24 | #include "ncplib_kernel.h" | |
25 | ||
26 | /* maximum limit for ncp_objectname_ioctl */ | |
27 | #define NCP_OBJECT_NAME_MAX_LEN 4096 | |
28 | /* maximum limit for ncp_privatedata_ioctl */ | |
29 | #define NCP_PRIVATE_DATA_MAX_LEN 8192 | |
30 | /* maximum negotiable packet size */ | |
31 | #define NCP_PACKET_SIZE_INTERNAL 65536 | |
32 | ||
33 | static int | |
8c744fb8 CH |
34 | ncp_get_fs_info(struct ncp_server * server, struct file *file, |
35 | struct ncp_fs_info __user *arg) | |
1da177e4 | 36 | { |
8c744fb8 | 37 | struct inode *inode = file->f_dentry->d_inode; |
1da177e4 LT |
38 | struct ncp_fs_info info; |
39 | ||
8c744fb8 | 40 | if ((file_permission(file, MAY_WRITE) != 0) |
1da177e4 LT |
41 | && (current->uid != server->m.mounted_uid)) { |
42 | return -EACCES; | |
43 | } | |
44 | if (copy_from_user(&info, arg, sizeof(info))) | |
45 | return -EFAULT; | |
46 | ||
47 | if (info.version != NCP_GET_FS_INFO_VERSION) { | |
48 | DPRINTK("info.version invalid: %d\n", info.version); | |
49 | return -EINVAL; | |
50 | } | |
51 | /* TODO: info.addr = server->m.serv_addr; */ | |
52 | SET_UID(info.mounted_uid, server->m.mounted_uid); | |
53 | info.connection = server->connection; | |
54 | info.buffer_size = server->buffer_size; | |
55 | info.volume_number = NCP_FINFO(inode)->volNumber; | |
56 | info.directory_id = NCP_FINFO(inode)->DosDirNum; | |
57 | ||
58 | if (copy_to_user(arg, &info, sizeof(info))) | |
59 | return -EFAULT; | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static int | |
8c744fb8 CH |
64 | ncp_get_fs_info_v2(struct ncp_server * server, struct file *file, |
65 | struct ncp_fs_info_v2 __user * arg) | |
1da177e4 | 66 | { |
8c744fb8 | 67 | struct inode *inode = file->f_dentry->d_inode; |
1da177e4 LT |
68 | struct ncp_fs_info_v2 info2; |
69 | ||
8c744fb8 | 70 | if ((file_permission(file, MAY_WRITE) != 0) |
1da177e4 LT |
71 | && (current->uid != server->m.mounted_uid)) { |
72 | return -EACCES; | |
73 | } | |
74 | if (copy_from_user(&info2, arg, sizeof(info2))) | |
75 | return -EFAULT; | |
76 | ||
77 | if (info2.version != NCP_GET_FS_INFO_VERSION_V2) { | |
78 | DPRINTK("info.version invalid: %d\n", info2.version); | |
79 | return -EINVAL; | |
80 | } | |
81 | info2.mounted_uid = server->m.mounted_uid; | |
82 | info2.connection = server->connection; | |
83 | info2.buffer_size = server->buffer_size; | |
84 | info2.volume_number = NCP_FINFO(inode)->volNumber; | |
85 | info2.directory_id = NCP_FINFO(inode)->DosDirNum; | |
86 | info2.dummy1 = info2.dummy2 = info2.dummy3 = 0; | |
87 | ||
88 | if (copy_to_user(arg, &info2, sizeof(info2))) | |
89 | return -EFAULT; | |
90 | return 0; | |
91 | } | |
92 | ||
93 | #ifdef CONFIG_NCPFS_NLS | |
94 | /* Here we are select the iocharset and the codepage for NLS. | |
95 | * Thanks Petr Vandrovec for idea and many hints. | |
96 | */ | |
97 | static int | |
98 | ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg) | |
99 | { | |
100 | struct ncp_nls_ioctl user; | |
101 | struct nls_table *codepage; | |
102 | struct nls_table *iocharset; | |
103 | struct nls_table *oldset_io; | |
104 | struct nls_table *oldset_cp; | |
105 | ||
106 | if (!capable(CAP_SYS_ADMIN)) | |
107 | return -EACCES; | |
108 | if (server->root_setuped) | |
109 | return -EBUSY; | |
110 | ||
111 | if (copy_from_user(&user, arg, sizeof(user))) | |
112 | return -EFAULT; | |
113 | ||
114 | codepage = NULL; | |
115 | user.codepage[NCP_IOCSNAME_LEN] = 0; | |
116 | if (!user.codepage[0] || !strcmp(user.codepage, "default")) | |
117 | codepage = load_nls_default(); | |
118 | else { | |
119 | codepage = load_nls(user.codepage); | |
120 | if (!codepage) { | |
121 | return -EBADRQC; | |
122 | } | |
123 | } | |
124 | ||
125 | iocharset = NULL; | |
126 | user.iocharset[NCP_IOCSNAME_LEN] = 0; | |
127 | if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) { | |
128 | iocharset = load_nls_default(); | |
129 | NCP_CLR_FLAG(server, NCP_FLAG_UTF8); | |
130 | } else if (!strcmp(user.iocharset, "utf8")) { | |
131 | iocharset = load_nls_default(); | |
132 | NCP_SET_FLAG(server, NCP_FLAG_UTF8); | |
133 | } else { | |
134 | iocharset = load_nls(user.iocharset); | |
135 | if (!iocharset) { | |
136 | unload_nls(codepage); | |
137 | return -EBADRQC; | |
138 | } | |
139 | NCP_CLR_FLAG(server, NCP_FLAG_UTF8); | |
140 | } | |
141 | ||
142 | oldset_cp = server->nls_vol; | |
143 | server->nls_vol = codepage; | |
144 | oldset_io = server->nls_io; | |
145 | server->nls_io = iocharset; | |
146 | ||
147 | if (oldset_cp) | |
148 | unload_nls(oldset_cp); | |
149 | if (oldset_io) | |
150 | unload_nls(oldset_io); | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static int | |
156 | ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg) | |
157 | { | |
158 | struct ncp_nls_ioctl user; | |
159 | int len; | |
160 | ||
161 | memset(&user, 0, sizeof(user)); | |
162 | if (server->nls_vol && server->nls_vol->charset) { | |
163 | len = strlen(server->nls_vol->charset); | |
164 | if (len > NCP_IOCSNAME_LEN) | |
165 | len = NCP_IOCSNAME_LEN; | |
166 | strncpy(user.codepage, server->nls_vol->charset, len); | |
167 | user.codepage[len] = 0; | |
168 | } | |
169 | ||
170 | if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) | |
171 | strcpy(user.iocharset, "utf8"); | |
172 | else if (server->nls_io && server->nls_io->charset) { | |
173 | len = strlen(server->nls_io->charset); | |
174 | if (len > NCP_IOCSNAME_LEN) | |
175 | len = NCP_IOCSNAME_LEN; | |
176 | strncpy(user.iocharset, server->nls_io->charset, len); | |
177 | user.iocharset[len] = 0; | |
178 | } | |
179 | ||
180 | if (copy_to_user(arg, &user, sizeof(user))) | |
181 | return -EFAULT; | |
182 | return 0; | |
183 | } | |
184 | #endif /* CONFIG_NCPFS_NLS */ | |
185 | ||
186 | int ncp_ioctl(struct inode *inode, struct file *filp, | |
187 | unsigned int cmd, unsigned long arg) | |
188 | { | |
189 | struct ncp_server *server = NCP_SERVER(inode); | |
190 | int result; | |
191 | struct ncp_ioctl_request request; | |
192 | char* bouncebuffer; | |
193 | void __user *argp = (void __user *)arg; | |
194 | ||
195 | switch (cmd) { | |
196 | case NCP_IOC_NCPREQUEST: | |
197 | ||
8c744fb8 | 198 | if ((file_permission(filp, MAY_WRITE) != 0) |
1da177e4 LT |
199 | && (current->uid != server->m.mounted_uid)) { |
200 | return -EACCES; | |
201 | } | |
202 | if (copy_from_user(&request, argp, sizeof(request))) | |
203 | return -EFAULT; | |
204 | ||
205 | if ((request.function > 255) | |
206 | || (request.size > | |
207 | NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) { | |
208 | return -EINVAL; | |
209 | } | |
210 | bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL); | |
211 | if (!bouncebuffer) | |
212 | return -ENOMEM; | |
213 | if (copy_from_user(bouncebuffer, request.data, request.size)) { | |
214 | vfree(bouncebuffer); | |
215 | return -EFAULT; | |
216 | } | |
217 | ncp_lock_server(server); | |
218 | ||
219 | /* FIXME: We hack around in the server's structures | |
220 | here to be able to use ncp_request */ | |
221 | ||
222 | server->has_subfunction = 0; | |
223 | server->current_size = request.size; | |
224 | memcpy(server->packet, bouncebuffer, request.size); | |
225 | ||
226 | result = ncp_request2(server, request.function, | |
227 | bouncebuffer, NCP_PACKET_SIZE_INTERNAL); | |
228 | if (result < 0) | |
229 | result = -EIO; | |
230 | else | |
231 | result = server->reply_size; | |
232 | ncp_unlock_server(server); | |
233 | DPRINTK("ncp_ioctl: copy %d bytes\n", | |
234 | result); | |
235 | if (result >= 0) | |
236 | if (copy_to_user(request.data, bouncebuffer, result)) | |
237 | result = -EFAULT; | |
238 | vfree(bouncebuffer); | |
239 | return result; | |
240 | ||
241 | case NCP_IOC_CONN_LOGGED_IN: | |
242 | ||
243 | if (!capable(CAP_SYS_ADMIN)) | |
244 | return -EACCES; | |
245 | if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE)) | |
246 | return -EINVAL; | |
247 | if (server->root_setuped) | |
248 | return -EBUSY; | |
249 | server->root_setuped = 1; | |
250 | return ncp_conn_logged_in(inode->i_sb); | |
251 | ||
252 | case NCP_IOC_GET_FS_INFO: | |
8c744fb8 | 253 | return ncp_get_fs_info(server, filp, argp); |
1da177e4 LT |
254 | |
255 | case NCP_IOC_GET_FS_INFO_V2: | |
8c744fb8 | 256 | return ncp_get_fs_info_v2(server, filp, argp); |
1da177e4 LT |
257 | |
258 | case NCP_IOC_GETMOUNTUID2: | |
259 | { | |
260 | unsigned long tmp = server->m.mounted_uid; | |
261 | ||
8c744fb8 | 262 | if ((file_permission(filp, MAY_READ) != 0) |
1da177e4 LT |
263 | && (current->uid != server->m.mounted_uid)) |
264 | { | |
265 | return -EACCES; | |
266 | } | |
267 | if (put_user(tmp, (unsigned long __user *)argp)) | |
268 | return -EFAULT; | |
269 | return 0; | |
270 | } | |
271 | ||
272 | case NCP_IOC_GETROOT: | |
273 | { | |
274 | struct ncp_setroot_ioctl sr; | |
275 | ||
8c744fb8 | 276 | if ((file_permission(filp, MAY_READ) != 0) |
1da177e4 LT |
277 | && (current->uid != server->m.mounted_uid)) |
278 | { | |
279 | return -EACCES; | |
280 | } | |
281 | if (server->m.mounted_vol[0]) { | |
282 | struct dentry* dentry = inode->i_sb->s_root; | |
283 | ||
284 | if (dentry) { | |
285 | struct inode* inode = dentry->d_inode; | |
286 | ||
287 | if (inode) { | |
288 | sr.volNumber = NCP_FINFO(inode)->volNumber; | |
289 | sr.dirEntNum = NCP_FINFO(inode)->dirEntNum; | |
290 | sr.namespace = server->name_space[sr.volNumber]; | |
291 | } else | |
292 | DPRINTK("ncpfs: s_root->d_inode==NULL\n"); | |
293 | } else | |
294 | DPRINTK("ncpfs: s_root==NULL\n"); | |
295 | } else { | |
296 | sr.volNumber = -1; | |
297 | sr.namespace = 0; | |
298 | sr.dirEntNum = 0; | |
299 | } | |
300 | if (copy_to_user(argp, &sr, sizeof(sr))) | |
301 | return -EFAULT; | |
302 | return 0; | |
303 | } | |
304 | case NCP_IOC_SETROOT: | |
305 | { | |
306 | struct ncp_setroot_ioctl sr; | |
307 | __u32 vnum; | |
308 | __le32 de; | |
309 | __le32 dosde; | |
310 | struct dentry* dentry; | |
311 | ||
312 | if (!capable(CAP_SYS_ADMIN)) | |
313 | { | |
314 | return -EACCES; | |
315 | } | |
316 | if (server->root_setuped) return -EBUSY; | |
317 | if (copy_from_user(&sr, argp, sizeof(sr))) | |
318 | return -EFAULT; | |
319 | if (sr.volNumber < 0) { | |
320 | server->m.mounted_vol[0] = 0; | |
321 | vnum = NCP_NUMBER_OF_VOLUMES; | |
322 | de = 0; | |
323 | dosde = 0; | |
324 | } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) { | |
325 | return -EINVAL; | |
326 | } else if (ncp_mount_subdir(server, sr.volNumber, | |
327 | sr.namespace, sr.dirEntNum, | |
328 | &vnum, &de, &dosde)) { | |
329 | return -ENOENT; | |
330 | } | |
331 | ||
332 | dentry = inode->i_sb->s_root; | |
333 | server->root_setuped = 1; | |
334 | if (dentry) { | |
335 | struct inode* inode = dentry->d_inode; | |
336 | ||
337 | if (inode) { | |
338 | NCP_FINFO(inode)->volNumber = vnum; | |
339 | NCP_FINFO(inode)->dirEntNum = de; | |
340 | NCP_FINFO(inode)->DosDirNum = dosde; | |
341 | } else | |
342 | DPRINTK("ncpfs: s_root->d_inode==NULL\n"); | |
343 | } else | |
344 | DPRINTK("ncpfs: s_root==NULL\n"); | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | #ifdef CONFIG_NCPFS_PACKET_SIGNING | |
350 | case NCP_IOC_SIGN_INIT: | |
8c744fb8 | 351 | if ((file_permission(filp, MAY_WRITE) != 0) |
1da177e4 LT |
352 | && (current->uid != server->m.mounted_uid)) |
353 | { | |
354 | return -EACCES; | |
355 | } | |
356 | if (argp) { | |
357 | if (server->sign_wanted) | |
358 | { | |
359 | struct ncp_sign_init sign; | |
360 | ||
361 | if (copy_from_user(&sign, argp, sizeof(sign))) | |
362 | return -EFAULT; | |
363 | memcpy(server->sign_root,sign.sign_root,8); | |
364 | memcpy(server->sign_last,sign.sign_last,16); | |
365 | server->sign_active = 1; | |
366 | } | |
367 | /* ignore when signatures not wanted */ | |
368 | } else { | |
369 | server->sign_active = 0; | |
370 | } | |
371 | return 0; | |
372 | ||
373 | case NCP_IOC_SIGN_WANTED: | |
8c744fb8 | 374 | if ((file_permission(filp, MAY_READ) != 0) |
1da177e4 LT |
375 | && (current->uid != server->m.mounted_uid)) |
376 | { | |
377 | return -EACCES; | |
378 | } | |
379 | ||
380 | if (put_user(server->sign_wanted, (int __user *)argp)) | |
381 | return -EFAULT; | |
382 | return 0; | |
383 | case NCP_IOC_SET_SIGN_WANTED: | |
384 | { | |
385 | int newstate; | |
386 | ||
8c744fb8 | 387 | if ((file_permission(filp, MAY_WRITE) != 0) |
1da177e4 LT |
388 | && (current->uid != server->m.mounted_uid)) |
389 | { | |
390 | return -EACCES; | |
391 | } | |
392 | /* get only low 8 bits... */ | |
393 | if (get_user(newstate, (unsigned char __user *)argp)) | |
394 | return -EFAULT; | |
395 | if (server->sign_active) { | |
396 | /* cannot turn signatures OFF when active */ | |
397 | if (!newstate) return -EINVAL; | |
398 | } else { | |
399 | server->sign_wanted = newstate != 0; | |
400 | } | |
401 | return 0; | |
402 | } | |
403 | ||
404 | #endif /* CONFIG_NCPFS_PACKET_SIGNING */ | |
405 | ||
406 | #ifdef CONFIG_NCPFS_IOCTL_LOCKING | |
407 | case NCP_IOC_LOCKUNLOCK: | |
8c744fb8 | 408 | if ((file_permission(filp, MAY_WRITE) != 0) |
1da177e4 LT |
409 | && (current->uid != server->m.mounted_uid)) |
410 | { | |
411 | return -EACCES; | |
412 | } | |
413 | { | |
414 | struct ncp_lock_ioctl rqdata; | |
415 | int result; | |
416 | ||
417 | if (copy_from_user(&rqdata, argp, sizeof(rqdata))) | |
418 | return -EFAULT; | |
419 | if (rqdata.origin != 0) | |
420 | return -EINVAL; | |
421 | /* check for cmd */ | |
422 | switch (rqdata.cmd) { | |
423 | case NCP_LOCK_EX: | |
424 | case NCP_LOCK_SH: | |
425 | if (rqdata.timeout == 0) | |
426 | rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; | |
427 | else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT) | |
428 | rqdata.timeout = NCP_LOCK_MAX_TIMEOUT; | |
429 | break; | |
430 | case NCP_LOCK_LOG: | |
431 | rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */ | |
432 | case NCP_LOCK_CLEAR: | |
433 | break; | |
434 | default: | |
435 | return -EINVAL; | |
436 | } | |
437 | /* locking needs both read and write access */ | |
438 | if ((result = ncp_make_open(inode, O_RDWR)) != 0) | |
439 | { | |
440 | return result; | |
441 | } | |
442 | result = -EIO; | |
443 | if (!ncp_conn_valid(server)) | |
444 | goto outrel; | |
445 | result = -EISDIR; | |
446 | if (!S_ISREG(inode->i_mode)) | |
447 | goto outrel; | |
448 | if (rqdata.cmd == NCP_LOCK_CLEAR) | |
449 | { | |
450 | result = ncp_ClearPhysicalRecord(NCP_SERVER(inode), | |
451 | NCP_FINFO(inode)->file_handle, | |
452 | rqdata.offset, | |
453 | rqdata.length); | |
454 | if (result > 0) result = 0; /* no such lock */ | |
455 | } | |
456 | else | |
457 | { | |
458 | int lockcmd; | |
459 | ||
460 | switch (rqdata.cmd) | |
461 | { | |
462 | case NCP_LOCK_EX: lockcmd=1; break; | |
463 | case NCP_LOCK_SH: lockcmd=3; break; | |
464 | default: lockcmd=0; break; | |
465 | } | |
466 | result = ncp_LogPhysicalRecord(NCP_SERVER(inode), | |
467 | NCP_FINFO(inode)->file_handle, | |
468 | lockcmd, | |
469 | rqdata.offset, | |
470 | rqdata.length, | |
471 | rqdata.timeout); | |
472 | if (result > 0) result = -EAGAIN; | |
473 | } | |
474 | outrel: | |
475 | ncp_inode_close(inode); | |
476 | return result; | |
477 | } | |
478 | #endif /* CONFIG_NCPFS_IOCTL_LOCKING */ | |
479 | ||
480 | case NCP_IOC_GETOBJECTNAME: | |
481 | if (current->uid != server->m.mounted_uid) { | |
482 | return -EACCES; | |
483 | } | |
484 | { | |
485 | struct ncp_objectname_ioctl user; | |
486 | size_t outl; | |
487 | ||
488 | if (copy_from_user(&user, argp, sizeof(user))) | |
489 | return -EFAULT; | |
490 | user.auth_type = server->auth.auth_type; | |
491 | outl = user.object_name_len; | |
492 | user.object_name_len = server->auth.object_name_len; | |
493 | if (outl > user.object_name_len) | |
494 | outl = user.object_name_len; | |
495 | if (outl) { | |
496 | if (copy_to_user(user.object_name, | |
497 | server->auth.object_name, | |
498 | outl)) return -EFAULT; | |
499 | } | |
500 | if (copy_to_user(argp, &user, sizeof(user))) | |
501 | return -EFAULT; | |
502 | return 0; | |
503 | } | |
504 | case NCP_IOC_SETOBJECTNAME: | |
505 | if (current->uid != server->m.mounted_uid) { | |
506 | return -EACCES; | |
507 | } | |
508 | { | |
509 | struct ncp_objectname_ioctl user; | |
510 | void* newname; | |
511 | void* oldname; | |
512 | size_t oldnamelen; | |
513 | void* oldprivate; | |
514 | size_t oldprivatelen; | |
515 | ||
516 | if (copy_from_user(&user, argp, sizeof(user))) | |
517 | return -EFAULT; | |
518 | if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN) | |
519 | return -ENOMEM; | |
520 | if (user.object_name_len) { | |
44db77f3 PE |
521 | newname = kmalloc(user.object_name_len, GFP_USER); |
522 | if (!newname) | |
523 | return -ENOMEM; | |
1da177e4 | 524 | if (copy_from_user(newname, user.object_name, user.object_name_len)) { |
44db77f3 | 525 | kfree(newname); |
1da177e4 LT |
526 | return -EFAULT; |
527 | } | |
528 | } else { | |
529 | newname = NULL; | |
530 | } | |
531 | /* enter critical section */ | |
532 | /* maybe that kfree can sleep so do that this way */ | |
533 | /* it is at least more SMP friendly (in future...) */ | |
534 | oldname = server->auth.object_name; | |
535 | oldnamelen = server->auth.object_name_len; | |
536 | oldprivate = server->priv.data; | |
537 | oldprivatelen = server->priv.len; | |
538 | server->auth.auth_type = user.auth_type; | |
539 | server->auth.object_name_len = user.object_name_len; | |
540 | server->auth.object_name = newname; | |
541 | server->priv.len = 0; | |
542 | server->priv.data = NULL; | |
543 | /* leave critical section */ | |
44db77f3 PE |
544 | kfree(oldprivate); |
545 | kfree(oldname); | |
1da177e4 LT |
546 | return 0; |
547 | } | |
548 | case NCP_IOC_GETPRIVATEDATA: | |
549 | if (current->uid != server->m.mounted_uid) { | |
550 | return -EACCES; | |
551 | } | |
552 | { | |
553 | struct ncp_privatedata_ioctl user; | |
554 | size_t outl; | |
555 | ||
556 | if (copy_from_user(&user, argp, sizeof(user))) | |
557 | return -EFAULT; | |
558 | outl = user.len; | |
559 | user.len = server->priv.len; | |
560 | if (outl > user.len) outl = user.len; | |
561 | if (outl) { | |
562 | if (copy_to_user(user.data, | |
563 | server->priv.data, | |
564 | outl)) return -EFAULT; | |
565 | } | |
566 | if (copy_to_user(argp, &user, sizeof(user))) | |
567 | return -EFAULT; | |
568 | return 0; | |
569 | } | |
570 | case NCP_IOC_SETPRIVATEDATA: | |
571 | if (current->uid != server->m.mounted_uid) { | |
572 | return -EACCES; | |
573 | } | |
574 | { | |
575 | struct ncp_privatedata_ioctl user; | |
576 | void* new; | |
577 | void* old; | |
578 | size_t oldlen; | |
579 | ||
580 | if (copy_from_user(&user, argp, sizeof(user))) | |
581 | return -EFAULT; | |
582 | if (user.len > NCP_PRIVATE_DATA_MAX_LEN) | |
583 | return -ENOMEM; | |
584 | if (user.len) { | |
44db77f3 PE |
585 | new = kmalloc(user.len, GFP_USER); |
586 | if (!new) | |
587 | return -ENOMEM; | |
1da177e4 | 588 | if (copy_from_user(new, user.data, user.len)) { |
44db77f3 | 589 | kfree(new); |
1da177e4 LT |
590 | return -EFAULT; |
591 | } | |
592 | } else { | |
593 | new = NULL; | |
594 | } | |
595 | /* enter critical section */ | |
596 | old = server->priv.data; | |
597 | oldlen = server->priv.len; | |
598 | server->priv.len = user.len; | |
599 | server->priv.data = new; | |
600 | /* leave critical section */ | |
44db77f3 | 601 | kfree(old); |
1da177e4 LT |
602 | return 0; |
603 | } | |
604 | ||
605 | #ifdef CONFIG_NCPFS_NLS | |
606 | case NCP_IOC_SETCHARSETS: | |
607 | return ncp_set_charsets(server, argp); | |
608 | ||
609 | case NCP_IOC_GETCHARSETS: | |
610 | return ncp_get_charsets(server, argp); | |
611 | ||
612 | #endif /* CONFIG_NCPFS_NLS */ | |
613 | ||
614 | case NCP_IOC_SETDENTRYTTL: | |
8c744fb8 | 615 | if ((file_permission(filp, MAY_WRITE) != 0) && |
1da177e4 LT |
616 | (current->uid != server->m.mounted_uid)) |
617 | return -EACCES; | |
618 | { | |
619 | u_int32_t user; | |
620 | ||
621 | if (copy_from_user(&user, argp, sizeof(user))) | |
622 | return -EFAULT; | |
623 | /* 20 secs at most... */ | |
624 | if (user > 20000) | |
625 | return -EINVAL; | |
626 | user = (user * HZ) / 1000; | |
627 | server->dentry_ttl = user; | |
628 | return 0; | |
629 | } | |
630 | ||
631 | case NCP_IOC_GETDENTRYTTL: | |
632 | { | |
633 | u_int32_t user = (server->dentry_ttl * 1000) / HZ; | |
634 | if (copy_to_user(argp, &user, sizeof(user))) | |
635 | return -EFAULT; | |
636 | return 0; | |
637 | } | |
638 | ||
639 | } | |
640 | /* #ifdef CONFIG_UID16 */ | |
641 | /* NCP_IOC_GETMOUNTUID may be same as NCP_IOC_GETMOUNTUID2, | |
642 | so we have this out of switch */ | |
643 | if (cmd == NCP_IOC_GETMOUNTUID) { | |
644 | __kernel_uid_t uid = 0; | |
8c744fb8 | 645 | if ((file_permission(filp, MAY_READ) != 0) |
1da177e4 LT |
646 | && (current->uid != server->m.mounted_uid)) { |
647 | return -EACCES; | |
648 | } | |
649 | SET_UID(uid, server->m.mounted_uid); | |
650 | if (put_user(uid, (__kernel_uid_t __user *)argp)) | |
651 | return -EFAULT; | |
652 | return 0; | |
653 | } | |
654 | /* #endif */ | |
655 | return -EINVAL; | |
656 | } |