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