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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/capability.h>
11#include <linux/compat.h>
12#include <linux/errno.h>
13#include <linux/fs.h>
14#include <linux/ioctl.h>
15#include <linux/time.h>
16#include <linux/mm.h>
17#include <linux/mount.h>
18#include <linux/slab.h>
19#include <linux/highuid.h>
20#include <linux/vmalloc.h>
21#include <linux/sched.h>
22
23#include <asm/uaccess.h>
24
25#include "ncp_fs.h"
26
27/* maximum limit for ncp_objectname_ioctl */
28#define NCP_OBJECT_NAME_MAX_LEN 4096
29/* maximum limit for ncp_privatedata_ioctl */
30#define NCP_PRIVATE_DATA_MAX_LEN 8192
31/* maximum negotiable packet size */
32#define NCP_PACKET_SIZE_INTERNAL 65536
33
34static int
35ncp_get_fs_info(struct ncp_server * server, struct inode *inode,
36 struct ncp_fs_info __user *arg)
37{
38 struct ncp_fs_info info;
39
40 if (copy_from_user(&info, arg, sizeof(info)))
41 return -EFAULT;
42
43 if (info.version != NCP_GET_FS_INFO_VERSION) {
44 ncp_dbg(1, "info.version invalid: %d\n", info.version);
45 return -EINVAL;
46 }
47 /* TODO: info.addr = server->m.serv_addr; */
48 SET_UID(info.mounted_uid, from_kuid_munged(current_user_ns(), server->m.mounted_uid));
49 info.connection = server->connection;
50 info.buffer_size = server->buffer_size;
51 info.volume_number = NCP_FINFO(inode)->volNumber;
52 info.directory_id = NCP_FINFO(inode)->DosDirNum;
53
54 if (copy_to_user(arg, &info, sizeof(info)))
55 return -EFAULT;
56 return 0;
57}
58
59static int
60ncp_get_fs_info_v2(struct ncp_server * server, struct inode *inode,
61 struct ncp_fs_info_v2 __user * arg)
62{
63 struct ncp_fs_info_v2 info2;
64
65 if (copy_from_user(&info2, arg, sizeof(info2)))
66 return -EFAULT;
67
68 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
69 ncp_dbg(1, "info.version invalid: %d\n", info2.version);
70 return -EINVAL;
71 }
72 info2.mounted_uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
73 info2.connection = server->connection;
74 info2.buffer_size = server->buffer_size;
75 info2.volume_number = NCP_FINFO(inode)->volNumber;
76 info2.directory_id = NCP_FINFO(inode)->DosDirNum;
77 info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
78
79 if (copy_to_user(arg, &info2, sizeof(info2)))
80 return -EFAULT;
81 return 0;
82}
83
84#ifdef CONFIG_COMPAT
85struct compat_ncp_objectname_ioctl
86{
87 s32 auth_type;
88 u32 object_name_len;
89 compat_caddr_t object_name; /* a userspace data, in most cases user name */
90};
91
92struct compat_ncp_fs_info_v2 {
93 s32 version;
94 u32 mounted_uid;
95 u32 connection;
96 u32 buffer_size;
97
98 u32 volume_number;
99 u32 directory_id;
100
101 u32 dummy1;
102 u32 dummy2;
103 u32 dummy3;
104};
105
106struct compat_ncp_ioctl_request {
107 u32 function;
108 u32 size;
109 compat_caddr_t data;
110};
111
112struct compat_ncp_privatedata_ioctl
113{
114 u32 len;
115 compat_caddr_t data; /* ~1000 for NDS */
116};
117
118#define NCP_IOC_GET_FS_INFO_V2_32 _IOWR('n', 4, struct compat_ncp_fs_info_v2)
119#define NCP_IOC_NCPREQUEST_32 _IOR('n', 1, struct compat_ncp_ioctl_request)
120#define NCP_IOC_GETOBJECTNAME_32 _IOWR('n', 9, struct compat_ncp_objectname_ioctl)
121#define NCP_IOC_SETOBJECTNAME_32 _IOR('n', 9, struct compat_ncp_objectname_ioctl)
122#define NCP_IOC_GETPRIVATEDATA_32 _IOWR('n', 10, struct compat_ncp_privatedata_ioctl)
123#define NCP_IOC_SETPRIVATEDATA_32 _IOR('n', 10, struct compat_ncp_privatedata_ioctl)
124
125static int
126ncp_get_compat_fs_info_v2(struct ncp_server * server, struct inode *inode,
127 struct compat_ncp_fs_info_v2 __user * arg)
128{
129 struct compat_ncp_fs_info_v2 info2;
130
131 if (copy_from_user(&info2, arg, sizeof(info2)))
132 return -EFAULT;
133
134 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
135 ncp_dbg(1, "info.version invalid: %d\n", info2.version);
136 return -EINVAL;
137 }
138 info2.mounted_uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
139 info2.connection = server->connection;
140 info2.buffer_size = server->buffer_size;
141 info2.volume_number = NCP_FINFO(inode)->volNumber;
142 info2.directory_id = NCP_FINFO(inode)->DosDirNum;
143 info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
144
145 if (copy_to_user(arg, &info2, sizeof(info2)))
146 return -EFAULT;
147 return 0;
148}
149#endif
150
151#define NCP_IOC_GETMOUNTUID16 _IOW('n', 2, u16)
152#define NCP_IOC_GETMOUNTUID32 _IOW('n', 2, u32)
153#define NCP_IOC_GETMOUNTUID64 _IOW('n', 2, u64)
154
155#ifdef CONFIG_NCPFS_NLS
156/* Here we are select the iocharset and the codepage for NLS.
157 * Thanks Petr Vandrovec for idea and many hints.
158 */
159static int
160ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
161{
162 struct ncp_nls_ioctl user;
163 struct nls_table *codepage;
164 struct nls_table *iocharset;
165 struct nls_table *oldset_io;
166 struct nls_table *oldset_cp;
167 int utf8;
168 int err;
169
170 if (copy_from_user(&user, arg, sizeof(user)))
171 return -EFAULT;
172
173 codepage = NULL;
174 user.codepage[NCP_IOCSNAME_LEN] = 0;
175 if (!user.codepage[0] || !strcmp(user.codepage, "default"))
176 codepage = load_nls_default();
177 else {
178 codepage = load_nls(user.codepage);
179 if (!codepage) {
180 return -EBADRQC;
181 }
182 }
183
184 iocharset = NULL;
185 user.iocharset[NCP_IOCSNAME_LEN] = 0;
186 if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
187 iocharset = load_nls_default();
188 utf8 = 0;
189 } else if (!strcmp(user.iocharset, "utf8")) {
190 iocharset = load_nls_default();
191 utf8 = 1;
192 } else {
193 iocharset = load_nls(user.iocharset);
194 if (!iocharset) {
195 unload_nls(codepage);
196 return -EBADRQC;
197 }
198 utf8 = 0;
199 }
200
201 mutex_lock(&server->root_setup_lock);
202 if (server->root_setuped) {
203 oldset_cp = codepage;
204 oldset_io = iocharset;
205 err = -EBUSY;
206 } else {
207 if (utf8)
208 NCP_SET_FLAG(server, NCP_FLAG_UTF8);
209 else
210 NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
211 oldset_cp = server->nls_vol;
212 server->nls_vol = codepage;
213 oldset_io = server->nls_io;
214 server->nls_io = iocharset;
215 err = 0;
216 }
217 mutex_unlock(&server->root_setup_lock);
218 unload_nls(oldset_cp);
219 unload_nls(oldset_io);
220
221 return err;
222}
223
224static int
225ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
226{
227 struct ncp_nls_ioctl user;
228 int len;
229
230 memset(&user, 0, sizeof(user));
231 mutex_lock(&server->root_setup_lock);
232 if (server->nls_vol && server->nls_vol->charset) {
233 len = strlen(server->nls_vol->charset);
234 if (len > NCP_IOCSNAME_LEN)
235 len = NCP_IOCSNAME_LEN;
236 strncpy(user.codepage, server->nls_vol->charset, len);
237 user.codepage[len] = 0;
238 }
239
240 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8))
241 strcpy(user.iocharset, "utf8");
242 else if (server->nls_io && server->nls_io->charset) {
243 len = strlen(server->nls_io->charset);
244 if (len > NCP_IOCSNAME_LEN)
245 len = NCP_IOCSNAME_LEN;
246 strncpy(user.iocharset, server->nls_io->charset, len);
247 user.iocharset[len] = 0;
248 }
249 mutex_unlock(&server->root_setup_lock);
250
251 if (copy_to_user(arg, &user, sizeof(user)))
252 return -EFAULT;
253 return 0;
254}
255#endif /* CONFIG_NCPFS_NLS */
256
257static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg)
258{
259 struct ncp_server *server = NCP_SERVER(inode);
260 int result;
261 struct ncp_ioctl_request request;
262 char* bouncebuffer;
263 void __user *argp = (void __user *)arg;
264
265 switch (cmd) {
266#ifdef CONFIG_COMPAT
267 case NCP_IOC_NCPREQUEST_32:
268#endif
269 case NCP_IOC_NCPREQUEST:
270#ifdef CONFIG_COMPAT
271 if (cmd == NCP_IOC_NCPREQUEST_32) {
272 struct compat_ncp_ioctl_request request32;
273 if (copy_from_user(&request32, argp, sizeof(request32)))
274 return -EFAULT;
275 request.function = request32.function;
276 request.size = request32.size;
277 request.data = compat_ptr(request32.data);
278 } else
279#endif
280 if (copy_from_user(&request, argp, sizeof(request)))
281 return -EFAULT;
282
283 if ((request.function > 255)
284 || (request.size >
285 NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
286 return -EINVAL;
287 }
288 bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
289 if (!bouncebuffer)
290 return -ENOMEM;
291 if (copy_from_user(bouncebuffer, request.data, request.size)) {
292 vfree(bouncebuffer);
293 return -EFAULT;
294 }
295 ncp_lock_server(server);
296
297 /* FIXME: We hack around in the server's structures
298 here to be able to use ncp_request */
299
300 server->has_subfunction = 0;
301 server->current_size = request.size;
302 memcpy(server->packet, bouncebuffer, request.size);
303
304 result = ncp_request2(server, request.function,
305 bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
306 if (result < 0)
307 result = -EIO;
308 else
309 result = server->reply_size;
310 ncp_unlock_server(server);
311 ncp_dbg(1, "copy %d bytes\n", result);
312 if (result >= 0)
313 if (copy_to_user(request.data, bouncebuffer, result))
314 result = -EFAULT;
315 vfree(bouncebuffer);
316 return result;
317
318 case NCP_IOC_CONN_LOGGED_IN:
319
320 if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
321 return -EINVAL;
322 mutex_lock(&server->root_setup_lock);
323 if (server->root_setuped)
324 result = -EBUSY;
325 else {
326 result = ncp_conn_logged_in(inode->i_sb);
327 if (result == 0)
328 server->root_setuped = 1;
329 }
330 mutex_unlock(&server->root_setup_lock);
331 return result;
332
333 case NCP_IOC_GET_FS_INFO:
334 return ncp_get_fs_info(server, inode, argp);
335
336 case NCP_IOC_GET_FS_INFO_V2:
337 return ncp_get_fs_info_v2(server, inode, argp);
338
339#ifdef CONFIG_COMPAT
340 case NCP_IOC_GET_FS_INFO_V2_32:
341 return ncp_get_compat_fs_info_v2(server, inode, argp);
342#endif
343 /* we have too many combinations of CONFIG_COMPAT,
344 * CONFIG_64BIT and CONFIG_UID16, so just handle
345 * any of the possible ioctls */
346 case NCP_IOC_GETMOUNTUID16:
347 {
348 u16 uid;
349
350 SET_UID(uid, from_kuid_munged(current_user_ns(), server->m.mounted_uid));
351 if (put_user(uid, (u16 __user *)argp))
352 return -EFAULT;
353 return 0;
354 }
355 case NCP_IOC_GETMOUNTUID32:
356 {
357 uid_t uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
358 if (put_user(uid, (u32 __user *)argp))
359 return -EFAULT;
360 return 0;
361 }
362 case NCP_IOC_GETMOUNTUID64:
363 {
364 uid_t uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
365 if (put_user(uid, (u64 __user *)argp))
366 return -EFAULT;
367 return 0;
368 }
369 case NCP_IOC_GETROOT:
370 {
371 struct ncp_setroot_ioctl sr;
372
373 result = -EACCES;
374 mutex_lock(&server->root_setup_lock);
375 if (server->m.mounted_vol[0]) {
376 struct dentry* dentry = inode->i_sb->s_root;
377
378 if (dentry) {
379 struct inode* s_inode = dentry->d_inode;
380
381 if (s_inode) {
382 sr.volNumber = NCP_FINFO(s_inode)->volNumber;
383 sr.dirEntNum = NCP_FINFO(s_inode)->dirEntNum;
384 sr.namespace = server->name_space[sr.volNumber];
385 result = 0;
386 } else
387 ncp_dbg(1, "s_root->d_inode==NULL\n");
388 } else
389 ncp_dbg(1, "s_root==NULL\n");
390 } else {
391 sr.volNumber = -1;
392 sr.namespace = 0;
393 sr.dirEntNum = 0;
394 result = 0;
395 }
396 mutex_unlock(&server->root_setup_lock);
397 if (!result && copy_to_user(argp, &sr, sizeof(sr)))
398 result = -EFAULT;
399 return result;
400 }
401
402 case NCP_IOC_SETROOT:
403 {
404 struct ncp_setroot_ioctl sr;
405 __u32 vnum;
406 __le32 de;
407 __le32 dosde;
408 struct dentry* dentry;
409
410 if (copy_from_user(&sr, argp, sizeof(sr)))
411 return -EFAULT;
412 mutex_lock(&server->root_setup_lock);
413 if (server->root_setuped)
414 result = -EBUSY;
415 else {
416 if (sr.volNumber < 0) {
417 server->m.mounted_vol[0] = 0;
418 vnum = NCP_NUMBER_OF_VOLUMES;
419 de = 0;
420 dosde = 0;
421 result = 0;
422 } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
423 result = -EINVAL;
424 } else if (ncp_mount_subdir(server, sr.volNumber,
425 sr.namespace, sr.dirEntNum,
426 &vnum, &de, &dosde)) {
427 result = -ENOENT;
428 } else
429 result = 0;
430
431 if (result == 0) {
432 dentry = inode->i_sb->s_root;
433 if (dentry) {
434 struct inode* s_inode = dentry->d_inode;
435
436 if (s_inode) {
437 NCP_FINFO(s_inode)->volNumber = vnum;
438 NCP_FINFO(s_inode)->dirEntNum = de;
439 NCP_FINFO(s_inode)->DosDirNum = dosde;
440 server->root_setuped = 1;
441 } else {
442 ncp_dbg(1, "s_root->d_inode==NULL\n");
443 result = -EIO;
444 }
445 } else {
446 ncp_dbg(1, "s_root==NULL\n");
447 result = -EIO;
448 }
449 }
450 result = 0;
451 }
452 mutex_unlock(&server->root_setup_lock);
453
454 return result;
455 }
456
457#ifdef CONFIG_NCPFS_PACKET_SIGNING
458 case NCP_IOC_SIGN_INIT:
459 {
460 struct ncp_sign_init sign;
461
462 if (argp)
463 if (copy_from_user(&sign, argp, sizeof(sign)))
464 return -EFAULT;
465 ncp_lock_server(server);
466 mutex_lock(&server->rcv.creq_mutex);
467 if (argp) {
468 if (server->sign_wanted) {
469 memcpy(server->sign_root,sign.sign_root,8);
470 memcpy(server->sign_last,sign.sign_last,16);
471 server->sign_active = 1;
472 }
473 /* ignore when signatures not wanted */
474 } else {
475 server->sign_active = 0;
476 }
477 mutex_unlock(&server->rcv.creq_mutex);
478 ncp_unlock_server(server);
479 return 0;
480 }
481
482 case NCP_IOC_SIGN_WANTED:
483 {
484 int state;
485
486 ncp_lock_server(server);
487 state = server->sign_wanted;
488 ncp_unlock_server(server);
489 if (put_user(state, (int __user *)argp))
490 return -EFAULT;
491 return 0;
492 }
493
494 case NCP_IOC_SET_SIGN_WANTED:
495 {
496 int newstate;
497
498 /* get only low 8 bits... */
499 if (get_user(newstate, (unsigned char __user *)argp))
500 return -EFAULT;
501 result = 0;
502 ncp_lock_server(server);
503 if (server->sign_active) {
504 /* cannot turn signatures OFF when active */
505 if (!newstate)
506 result = -EINVAL;
507 } else {
508 server->sign_wanted = newstate != 0;
509 }
510 ncp_unlock_server(server);
511 return result;
512 }
513
514#endif /* CONFIG_NCPFS_PACKET_SIGNING */
515
516#ifdef CONFIG_NCPFS_IOCTL_LOCKING
517 case NCP_IOC_LOCKUNLOCK:
518 {
519 struct ncp_lock_ioctl rqdata;
520
521 if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
522 return -EFAULT;
523 if (rqdata.origin != 0)
524 return -EINVAL;
525 /* check for cmd */
526 switch (rqdata.cmd) {
527 case NCP_LOCK_EX:
528 case NCP_LOCK_SH:
529 if (rqdata.timeout == 0)
530 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
531 else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
532 rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
533 break;
534 case NCP_LOCK_LOG:
535 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */
536 case NCP_LOCK_CLEAR:
537 break;
538 default:
539 return -EINVAL;
540 }
541 /* locking needs both read and write access */
542 if ((result = ncp_make_open(inode, O_RDWR)) != 0)
543 {
544 return result;
545 }
546 result = -EISDIR;
547 if (!S_ISREG(inode->i_mode))
548 goto outrel;
549 if (rqdata.cmd == NCP_LOCK_CLEAR)
550 {
551 result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
552 NCP_FINFO(inode)->file_handle,
553 rqdata.offset,
554 rqdata.length);
555 if (result > 0) result = 0; /* no such lock */
556 }
557 else
558 {
559 int lockcmd;
560
561 switch (rqdata.cmd)
562 {
563 case NCP_LOCK_EX: lockcmd=1; break;
564 case NCP_LOCK_SH: lockcmd=3; break;
565 default: lockcmd=0; break;
566 }
567 result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
568 NCP_FINFO(inode)->file_handle,
569 lockcmd,
570 rqdata.offset,
571 rqdata.length,
572 rqdata.timeout);
573 if (result > 0) result = -EAGAIN;
574 }
575outrel:
576 ncp_inode_close(inode);
577 return result;
578 }
579#endif /* CONFIG_NCPFS_IOCTL_LOCKING */
580
581#ifdef CONFIG_COMPAT
582 case NCP_IOC_GETOBJECTNAME_32:
583 {
584 struct compat_ncp_objectname_ioctl user;
585 size_t outl;
586
587 if (copy_from_user(&user, argp, sizeof(user)))
588 return -EFAULT;
589 down_read(&server->auth_rwsem);
590 user.auth_type = server->auth.auth_type;
591 outl = user.object_name_len;
592 user.object_name_len = server->auth.object_name_len;
593 if (outl > user.object_name_len)
594 outl = user.object_name_len;
595 result = 0;
596 if (outl) {
597 if (copy_to_user(compat_ptr(user.object_name),
598 server->auth.object_name,
599 outl))
600 result = -EFAULT;
601 }
602 up_read(&server->auth_rwsem);
603 if (!result && copy_to_user(argp, &user, sizeof(user)))
604 result = -EFAULT;
605 return result;
606 }
607#endif
608
609 case NCP_IOC_GETOBJECTNAME:
610 {
611 struct ncp_objectname_ioctl user;
612 size_t outl;
613
614 if (copy_from_user(&user, argp, sizeof(user)))
615 return -EFAULT;
616 down_read(&server->auth_rwsem);
617 user.auth_type = server->auth.auth_type;
618 outl = user.object_name_len;
619 user.object_name_len = server->auth.object_name_len;
620 if (outl > user.object_name_len)
621 outl = user.object_name_len;
622 result = 0;
623 if (outl) {
624 if (copy_to_user(user.object_name,
625 server->auth.object_name,
626 outl))
627 result = -EFAULT;
628 }
629 up_read(&server->auth_rwsem);
630 if (!result && copy_to_user(argp, &user, sizeof(user)))
631 result = -EFAULT;
632 return result;
633 }
634
635#ifdef CONFIG_COMPAT
636 case NCP_IOC_SETOBJECTNAME_32:
637#endif
638 case NCP_IOC_SETOBJECTNAME:
639 {
640 struct ncp_objectname_ioctl user;
641 void* newname;
642 void* oldname;
643 size_t oldnamelen;
644 void* oldprivate;
645 size_t oldprivatelen;
646
647#ifdef CONFIG_COMPAT
648 if (cmd == NCP_IOC_SETOBJECTNAME_32) {
649 struct compat_ncp_objectname_ioctl user32;
650 if (copy_from_user(&user32, argp, sizeof(user32)))
651 return -EFAULT;
652 user.auth_type = user32.auth_type;
653 user.object_name_len = user32.object_name_len;
654 user.object_name = compat_ptr(user32.object_name);
655 } else
656#endif
657 if (copy_from_user(&user, argp, sizeof(user)))
658 return -EFAULT;
659
660 if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
661 return -ENOMEM;
662 if (user.object_name_len) {
663 newname = memdup_user(user.object_name,
664 user.object_name_len);
665 if (IS_ERR(newname))
666 return PTR_ERR(newname);
667 } else {
668 newname = NULL;
669 }
670 down_write(&server->auth_rwsem);
671 oldname = server->auth.object_name;
672 oldnamelen = server->auth.object_name_len;
673 oldprivate = server->priv.data;
674 oldprivatelen = server->priv.len;
675 server->auth.auth_type = user.auth_type;
676 server->auth.object_name_len = user.object_name_len;
677 server->auth.object_name = newname;
678 server->priv.len = 0;
679 server->priv.data = NULL;
680 up_write(&server->auth_rwsem);
681 kfree(oldprivate);
682 kfree(oldname);
683 return 0;
684 }
685
686#ifdef CONFIG_COMPAT
687 case NCP_IOC_GETPRIVATEDATA_32:
688#endif
689 case NCP_IOC_GETPRIVATEDATA:
690 {
691 struct ncp_privatedata_ioctl user;
692 size_t outl;
693
694#ifdef CONFIG_COMPAT
695 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
696 struct compat_ncp_privatedata_ioctl user32;
697 if (copy_from_user(&user32, argp, sizeof(user32)))
698 return -EFAULT;
699 user.len = user32.len;
700 user.data = compat_ptr(user32.data);
701 } else
702#endif
703 if (copy_from_user(&user, argp, sizeof(user)))
704 return -EFAULT;
705
706 down_read(&server->auth_rwsem);
707 outl = user.len;
708 user.len = server->priv.len;
709 if (outl > user.len) outl = user.len;
710 result = 0;
711 if (outl) {
712 if (copy_to_user(user.data,
713 server->priv.data,
714 outl))
715 result = -EFAULT;
716 }
717 up_read(&server->auth_rwsem);
718 if (result)
719 return result;
720#ifdef CONFIG_COMPAT
721 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
722 struct compat_ncp_privatedata_ioctl user32;
723 user32.len = user.len;
724 user32.data = (unsigned long) user.data;
725 if (copy_to_user(argp, &user32, sizeof(user32)))
726 return -EFAULT;
727 } else
728#endif
729 if (copy_to_user(argp, &user, sizeof(user)))
730 return -EFAULT;
731
732 return 0;
733 }
734
735#ifdef CONFIG_COMPAT
736 case NCP_IOC_SETPRIVATEDATA_32:
737#endif
738 case NCP_IOC_SETPRIVATEDATA:
739 {
740 struct ncp_privatedata_ioctl user;
741 void* new;
742 void* old;
743 size_t oldlen;
744
745#ifdef CONFIG_COMPAT
746 if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
747 struct compat_ncp_privatedata_ioctl user32;
748 if (copy_from_user(&user32, argp, sizeof(user32)))
749 return -EFAULT;
750 user.len = user32.len;
751 user.data = compat_ptr(user32.data);
752 } else
753#endif
754 if (copy_from_user(&user, argp, sizeof(user)))
755 return -EFAULT;
756
757 if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
758 return -ENOMEM;
759 if (user.len) {
760 new = memdup_user(user.data, user.len);
761 if (IS_ERR(new))
762 return PTR_ERR(new);
763 } else {
764 new = NULL;
765 }
766 down_write(&server->auth_rwsem);
767 old = server->priv.data;
768 oldlen = server->priv.len;
769 server->priv.len = user.len;
770 server->priv.data = new;
771 up_write(&server->auth_rwsem);
772 kfree(old);
773 return 0;
774 }
775
776#ifdef CONFIG_NCPFS_NLS
777 case NCP_IOC_SETCHARSETS:
778 return ncp_set_charsets(server, argp);
779
780 case NCP_IOC_GETCHARSETS:
781 return ncp_get_charsets(server, argp);
782
783#endif /* CONFIG_NCPFS_NLS */
784
785 case NCP_IOC_SETDENTRYTTL:
786 {
787 u_int32_t user;
788
789 if (copy_from_user(&user, argp, sizeof(user)))
790 return -EFAULT;
791 /* 20 secs at most... */
792 if (user > 20000)
793 return -EINVAL;
794 user = (user * HZ) / 1000;
795 atomic_set(&server->dentry_ttl, user);
796 return 0;
797 }
798
799 case NCP_IOC_GETDENTRYTTL:
800 {
801 u_int32_t user = (atomic_read(&server->dentry_ttl) * 1000) / HZ;
802 if (copy_to_user(argp, &user, sizeof(user)))
803 return -EFAULT;
804 return 0;
805 }
806
807 }
808 return -EINVAL;
809}
810
811long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
812{
813 struct inode *inode = file_inode(filp);
814 struct ncp_server *server = NCP_SERVER(inode);
815 kuid_t uid = current_uid();
816 int need_drop_write = 0;
817 long ret;
818
819 switch (cmd) {
820 case NCP_IOC_SETCHARSETS:
821 case NCP_IOC_CONN_LOGGED_IN:
822 case NCP_IOC_SETROOT:
823 if (!capable(CAP_SYS_ADMIN)) {
824 ret = -EPERM;
825 goto out;
826 }
827 break;
828 }
829 if (!uid_eq(server->m.mounted_uid, uid)) {
830 switch (cmd) {
831 /*
832 * Only mount owner can issue these ioctls. Information
833 * necessary to authenticate to other NDS servers are
834 * stored here.
835 */
836 case NCP_IOC_GETOBJECTNAME:
837 case NCP_IOC_SETOBJECTNAME:
838 case NCP_IOC_GETPRIVATEDATA:
839 case NCP_IOC_SETPRIVATEDATA:
840#ifdef CONFIG_COMPAT
841 case NCP_IOC_GETOBJECTNAME_32:
842 case NCP_IOC_SETOBJECTNAME_32:
843 case NCP_IOC_GETPRIVATEDATA_32:
844 case NCP_IOC_SETPRIVATEDATA_32:
845#endif
846 ret = -EACCES;
847 goto out;
848 /*
849 * These require write access on the inode if user id
850 * does not match. Note that they do not write to the
851 * file... But old code did mnt_want_write, so I keep
852 * it as is. Of course not for mountpoint owner, as
853 * that breaks read-only mounts altogether as ncpmount
854 * needs working NCP_IOC_NCPREQUEST and
855 * NCP_IOC_GET_FS_INFO. Some of these codes (setdentryttl,
856 * signinit, setsignwanted) should be probably restricted
857 * to owner only, or even more to CAP_SYS_ADMIN).
858 */
859 case NCP_IOC_GET_FS_INFO:
860 case NCP_IOC_GET_FS_INFO_V2:
861 case NCP_IOC_NCPREQUEST:
862 case NCP_IOC_SETDENTRYTTL:
863 case NCP_IOC_SIGN_INIT:
864 case NCP_IOC_LOCKUNLOCK:
865 case NCP_IOC_SET_SIGN_WANTED:
866#ifdef CONFIG_COMPAT
867 case NCP_IOC_GET_FS_INFO_V2_32:
868 case NCP_IOC_NCPREQUEST_32:
869#endif
870 ret = mnt_want_write_file(filp);
871 if (ret)
872 goto out;
873 need_drop_write = 1;
874 ret = inode_permission(inode, MAY_WRITE);
875 if (ret)
876 goto outDropWrite;
877 break;
878 /*
879 * Read access required.
880 */
881 case NCP_IOC_GETMOUNTUID16:
882 case NCP_IOC_GETMOUNTUID32:
883 case NCP_IOC_GETMOUNTUID64:
884 case NCP_IOC_GETROOT:
885 case NCP_IOC_SIGN_WANTED:
886 ret = inode_permission(inode, MAY_READ);
887 if (ret)
888 goto out;
889 break;
890 /*
891 * Anybody can read these.
892 */
893 case NCP_IOC_GETCHARSETS:
894 case NCP_IOC_GETDENTRYTTL:
895 default:
896 /* Three codes below are protected by CAP_SYS_ADMIN above. */
897 case NCP_IOC_SETCHARSETS:
898 case NCP_IOC_CONN_LOGGED_IN:
899 case NCP_IOC_SETROOT:
900 break;
901 }
902 }
903 ret = __ncp_ioctl(inode, cmd, arg);
904outDropWrite:
905 if (need_drop_write)
906 mnt_drop_write_file(filp);
907out:
908 return ret;
909}
910
911#ifdef CONFIG_COMPAT
912long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
913{
914 long ret;
915
916 arg = (unsigned long) compat_ptr(arg);
917 ret = ncp_ioctl(file, cmd, arg);
918 return ret;
919}
920#endif