Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 DPRINTK("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, 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 DPRINTK("info.version invalid: %d\n", info2.version);
70 return -EINVAL;
71 }
72 info2.mounted_uid = 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 DPRINTK("info.version invalid: %d\n", info2.version);
136 return -EINVAL;
137 }
138 info2.mounted_uid = 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 DPRINTK("ncp_ioctl: copy %d bytes\n",
312 result);
313 if (result >= 0)
314 if (copy_to_user(request.data, bouncebuffer, result))
315 result = -EFAULT;
316 vfree(bouncebuffer);
317 return result;
318
319 case NCP_IOC_CONN_LOGGED_IN:
320
321 if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
322 return -EINVAL;
323 mutex_lock(&server->root_setup_lock);
324 if (server->root_setuped)
325 result = -EBUSY;
326 else {
327 result = ncp_conn_logged_in(inode->i_sb);
328 if (result == 0)
329 server->root_setuped = 1;
330 }
331 mutex_unlock(&server->root_setup_lock);
332 return result;
333
334 case NCP_IOC_GET_FS_INFO:
335 return ncp_get_fs_info(server, inode, argp);
336
337 case NCP_IOC_GET_FS_INFO_V2:
338 return ncp_get_fs_info_v2(server, inode, argp);
339
340#ifdef CONFIG_COMPAT
341 case NCP_IOC_GET_FS_INFO_V2_32:
342 return ncp_get_compat_fs_info_v2(server, inode, argp);
343#endif
344 /* we have too many combinations of CONFIG_COMPAT,
345 * CONFIG_64BIT and CONFIG_UID16, so just handle
346 * any of the possible ioctls */
347 case NCP_IOC_GETMOUNTUID16:
348 {
349 u16 uid;
350
351 SET_UID(uid, server->m.mounted_uid);
352 if (put_user(uid, (u16 __user *)argp))
353 return -EFAULT;
354 return 0;
355 }
356 case NCP_IOC_GETMOUNTUID32:
357 if (put_user(server->m.mounted_uid,
358 (u32 __user *)argp))
359 return -EFAULT;
360 return 0;
361 case NCP_IOC_GETMOUNTUID64:
362 if (put_user(server->m.mounted_uid,
363 (u64 __user *)argp))
364 return -EFAULT;
365 return 0;
366
367 case NCP_IOC_GETROOT:
368 {
369 struct ncp_setroot_ioctl sr;
370
371 result = -EACCES;
372 mutex_lock(&server->root_setup_lock);
373 if (server->m.mounted_vol[0]) {
374 struct dentry* dentry = inode->i_sb->s_root;
375
376 if (dentry) {
377 struct inode* s_inode = dentry->d_inode;
378
379 if (s_inode) {
380 sr.volNumber = NCP_FINFO(s_inode)->volNumber;
381 sr.dirEntNum = NCP_FINFO(s_inode)->dirEntNum;
382 sr.namespace = server->name_space[sr.volNumber];
383 result = 0;
384 } else
385 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
386 } else
387 DPRINTK("ncpfs: s_root==NULL\n");
388 } else {
389 sr.volNumber = -1;
390 sr.namespace = 0;
391 sr.dirEntNum = 0;
392 result = 0;
393 }
394 mutex_unlock(&server->root_setup_lock);
395 if (!result && copy_to_user(argp, &sr, sizeof(sr)))
396 result = -EFAULT;
397 return result;
398 }
399
400 case NCP_IOC_SETROOT:
401 {
402 struct ncp_setroot_ioctl sr;
403 __u32 vnum;
404 __le32 de;
405 __le32 dosde;
406 struct dentry* dentry;
407
408 if (copy_from_user(&sr, argp, sizeof(sr)))
409 return -EFAULT;
410 mutex_lock(&server->root_setup_lock);
411 if (server->root_setuped)
412 result = -EBUSY;
413 else {
414 if (sr.volNumber < 0) {
415 server->m.mounted_vol[0] = 0;
416 vnum = NCP_NUMBER_OF_VOLUMES;
417 de = 0;
418 dosde = 0;
419 result = 0;
420 } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
421 result = -EINVAL;
422 } else if (ncp_mount_subdir(server, sr.volNumber,
423 sr.namespace, sr.dirEntNum,
424 &vnum, &de, &dosde)) {
425 result = -ENOENT;
426 } else
427 result = 0;
428
429 if (result == 0) {
430 dentry = inode->i_sb->s_root;
431 if (dentry) {
432 struct inode* s_inode = dentry->d_inode;
433
434 if (s_inode) {
435 NCP_FINFO(s_inode)->volNumber = vnum;
436 NCP_FINFO(s_inode)->dirEntNum = de;
437 NCP_FINFO(s_inode)->DosDirNum = dosde;
438 server->root_setuped = 1;
439 } else {
440 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
441 result = -EIO;
442 }
443 } else {
444 DPRINTK("ncpfs: s_root==NULL\n");
445 result = -EIO;
446 }
447 }
448 result = 0;
449 }
450 mutex_unlock(&server->root_setup_lock);
451
452 return result;
453 }
454
455#ifdef CONFIG_NCPFS_PACKET_SIGNING
456 case NCP_IOC_SIGN_INIT:
457 {
458 struct ncp_sign_init sign;
459
460 if (argp)
461 if (copy_from_user(&sign, argp, sizeof(sign)))
462 return -EFAULT;
463 ncp_lock_server(server);
464 mutex_lock(&server->rcv.creq_mutex);
465 if (argp) {
466 if (server->sign_wanted) {
467 memcpy(server->sign_root,sign.sign_root,8);
468 memcpy(server->sign_last,sign.sign_last,16);
469 server->sign_active = 1;
470 }
471 /* ignore when signatures not wanted */
472 } else {
473 server->sign_active = 0;
474 }
475 mutex_unlock(&server->rcv.creq_mutex);
476 ncp_unlock_server(server);
477 return 0;
478 }
479
480 case NCP_IOC_SIGN_WANTED:
481 {
482 int state;
483
484 ncp_lock_server(server);
485 state = server->sign_wanted;
486 ncp_unlock_server(server);
487 if (put_user(state, (int __user *)argp))
488 return -EFAULT;
489 return 0;
490 }
491
492 case NCP_IOC_SET_SIGN_WANTED:
493 {
494 int newstate;
495
496 /* get only low 8 bits... */
497 if (get_user(newstate, (unsigned char __user *)argp))
498 return -EFAULT;
499 result = 0;
500 ncp_lock_server(server);
501 if (server->sign_active) {
502 /* cannot turn signatures OFF when active */
503 if (!newstate)
504 result = -EINVAL;
505 } else {
506 server->sign_wanted = newstate != 0;
507 }
508 ncp_unlock_server(server);
509 return result;
510 }
511
512#endif /* CONFIG_NCPFS_PACKET_SIGNING */
513
514#ifdef CONFIG_NCPFS_IOCTL_LOCKING
515 case NCP_IOC_LOCKUNLOCK:
516 {
517 struct ncp_lock_ioctl rqdata;
518
519 if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
520 return -EFAULT;
521 if (rqdata.origin != 0)
522 return -EINVAL;
523 /* check for cmd */
524 switch (rqdata.cmd) {
525 case NCP_LOCK_EX:
526 case NCP_LOCK_SH:
527 if (rqdata.timeout == 0)
528 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
529 else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
530 rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
531 break;
532 case NCP_LOCK_LOG:
533 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */
534 case NCP_LOCK_CLEAR:
535 break;
536 default:
537 return -EINVAL;
538 }
539 /* locking needs both read and write access */
540 if ((result = ncp_make_open(inode, O_RDWR)) != 0)
541 {
542 return result;
543 }
544 result = -EISDIR;
545 if (!S_ISREG(inode->i_mode))
546 goto outrel;
547 if (rqdata.cmd == NCP_LOCK_CLEAR)
548 {
549 result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
550 NCP_FINFO(inode)->file_handle,
551 rqdata.offset,
552 rqdata.length);
553 if (result > 0) result = 0; /* no such lock */
554 }
555 else
556 {
557 int lockcmd;
558
559 switch (rqdata.cmd)
560 {
561 case NCP_LOCK_EX: lockcmd=1; break;
562 case NCP_LOCK_SH: lockcmd=3; break;
563 default: lockcmd=0; break;
564 }
565 result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
566 NCP_FINFO(inode)->file_handle,
567 lockcmd,
568 rqdata.offset,
569 rqdata.length,
570 rqdata.timeout);
571 if (result > 0) result = -EAGAIN;
572 }
573outrel:
574 ncp_inode_close(inode);
575 return result;
576 }
577#endif /* CONFIG_NCPFS_IOCTL_LOCKING */
578
579#ifdef CONFIG_COMPAT
580 case NCP_IOC_GETOBJECTNAME_32:
581 {
582 struct compat_ncp_objectname_ioctl user;
583 size_t outl;
584
585 if (copy_from_user(&user, argp, sizeof(user)))
586 return -EFAULT;
587 down_read(&server->auth_rwsem);
588 user.auth_type = server->auth.auth_type;
589 outl = user.object_name_len;
590 user.object_name_len = server->auth.object_name_len;
591 if (outl > user.object_name_len)
592 outl = user.object_name_len;
593 result = 0;
594 if (outl) {
595 if (copy_to_user(compat_ptr(user.object_name),
596 server->auth.object_name,
597 outl))
598 result = -EFAULT;
599 }
600 up_read(&server->auth_rwsem);
601 if (!result && copy_to_user(argp, &user, sizeof(user)))
602 result = -EFAULT;
603 return result;
604 }
605#endif
606
607 case NCP_IOC_GETOBJECTNAME:
608 {
609 struct ncp_objectname_ioctl user;
610 size_t outl;
611
612 if (copy_from_user(&user, argp, sizeof(user)))
613 return -EFAULT;
614 down_read(&server->auth_rwsem);
615 user.auth_type = server->auth.auth_type;
616 outl = user.object_name_len;
617 user.object_name_len = server->auth.object_name_len;
618 if (outl > user.object_name_len)
619 outl = user.object_name_len;
620 result = 0;
621 if (outl) {
622 if (copy_to_user(user.object_name,
623 server->auth.object_name,
624 outl))
625 result = -EFAULT;
626 }
627 up_read(&server->auth_rwsem);
628 if (!result && copy_to_user(argp, &user, sizeof(user)))
629 result = -EFAULT;
630 return result;
631 }
632
633#ifdef CONFIG_COMPAT
634 case NCP_IOC_SETOBJECTNAME_32:
635#endif
636 case NCP_IOC_SETOBJECTNAME:
637 {
638 struct ncp_objectname_ioctl user;
639 void* newname;
640 void* oldname;
641 size_t oldnamelen;
642 void* oldprivate;
643 size_t oldprivatelen;
644
645#ifdef CONFIG_COMPAT
646 if (cmd == NCP_IOC_SETOBJECTNAME_32) {
647 struct compat_ncp_objectname_ioctl user32;
648 if (copy_from_user(&user32, argp, sizeof(user32)))
649 return -EFAULT;
650 user.auth_type = user32.auth_type;
651 user.object_name_len = user32.object_name_len;
652 user.object_name = compat_ptr(user32.object_name);
653 } else
654#endif
655 if (copy_from_user(&user, argp, sizeof(user)))
656 return -EFAULT;
657
658 if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
659 return -ENOMEM;
660 if (user.object_name_len) {
661 newname = memdup_user(user.object_name,
662 user.object_name_len);
663 if (IS_ERR(newname))
664 return PTR_ERR(newname);
665 } else {
666 newname = NULL;
667 }
668 down_write(&server->auth_rwsem);
669 oldname = server->auth.object_name;
670 oldnamelen = server->auth.object_name_len;
671 oldprivate = server->priv.data;
672 oldprivatelen = server->priv.len;
673 server->auth.auth_type = user.auth_type;
674 server->auth.object_name_len = user.object_name_len;
675 server->auth.object_name = newname;
676 server->priv.len = 0;
677 server->priv.data = NULL;
678 up_write(&server->auth_rwsem);
679 kfree(oldprivate);
680 kfree(oldname);
681 return 0;
682 }
683
684#ifdef CONFIG_COMPAT
685 case NCP_IOC_GETPRIVATEDATA_32:
686#endif
687 case NCP_IOC_GETPRIVATEDATA:
688 {
689 struct ncp_privatedata_ioctl user;
690 size_t outl;
691
692#ifdef CONFIG_COMPAT
693 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
694 struct compat_ncp_privatedata_ioctl user32;
695 if (copy_from_user(&user32, argp, sizeof(user32)))
696 return -EFAULT;
697 user.len = user32.len;
698 user.data = compat_ptr(user32.data);
699 } else
700#endif
701 if (copy_from_user(&user, argp, sizeof(user)))
702 return -EFAULT;
703
704 down_read(&server->auth_rwsem);
705 outl = user.len;
706 user.len = server->priv.len;
707 if (outl > user.len) outl = user.len;
708 result = 0;
709 if (outl) {
710 if (copy_to_user(user.data,
711 server->priv.data,
712 outl))
713 result = -EFAULT;
714 }
715 up_read(&server->auth_rwsem);
716 if (result)
717 return result;
718#ifdef CONFIG_COMPAT
719 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
720 struct compat_ncp_privatedata_ioctl user32;
721 user32.len = user.len;
722 user32.data = (unsigned long) user.data;
723 if (copy_to_user(argp, &user32, sizeof(user32)))
724 return -EFAULT;
725 } else
726#endif
727 if (copy_to_user(argp, &user, sizeof(user)))
728 return -EFAULT;
729
730 return 0;
731 }
732
733#ifdef CONFIG_COMPAT
734 case NCP_IOC_SETPRIVATEDATA_32:
735#endif
736 case NCP_IOC_SETPRIVATEDATA:
737 {
738 struct ncp_privatedata_ioctl user;
739 void* new;
740 void* old;
741 size_t oldlen;
742
743#ifdef CONFIG_COMPAT
744 if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
745 struct compat_ncp_privatedata_ioctl user32;
746 if (copy_from_user(&user32, argp, sizeof(user32)))
747 return -EFAULT;
748 user.len = user32.len;
749 user.data = compat_ptr(user32.data);
750 } else
751#endif
752 if (copy_from_user(&user, argp, sizeof(user)))
753 return -EFAULT;
754
755 if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
756 return -ENOMEM;
757 if (user.len) {
758 new = memdup_user(user.data, user.len);
759 if (IS_ERR(new))
760 return PTR_ERR(new);
761 } else {
762 new = NULL;
763 }
764 down_write(&server->auth_rwsem);
765 old = server->priv.data;
766 oldlen = server->priv.len;
767 server->priv.len = user.len;
768 server->priv.data = new;
769 up_write(&server->auth_rwsem);
770 kfree(old);
771 return 0;
772 }
773
774#ifdef CONFIG_NCPFS_NLS
775 case NCP_IOC_SETCHARSETS:
776 return ncp_set_charsets(server, argp);
777
778 case NCP_IOC_GETCHARSETS:
779 return ncp_get_charsets(server, argp);
780
781#endif /* CONFIG_NCPFS_NLS */
782
783 case NCP_IOC_SETDENTRYTTL:
784 {
785 u_int32_t user;
786
787 if (copy_from_user(&user, argp, sizeof(user)))
788 return -EFAULT;
789 /* 20 secs at most... */
790 if (user > 20000)
791 return -EINVAL;
792 user = (user * HZ) / 1000;
793 atomic_set(&server->dentry_ttl, user);
794 return 0;
795 }
796
797 case NCP_IOC_GETDENTRYTTL:
798 {
799 u_int32_t user = (atomic_read(&server->dentry_ttl) * 1000) / HZ;
800 if (copy_to_user(argp, &user, sizeof(user)))
801 return -EFAULT;
802 return 0;
803 }
804
805 }
806 return -EINVAL;
807}
808
809long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
810{
811 struct inode *inode = filp->f_dentry->d_inode;
812 struct ncp_server *server = NCP_SERVER(inode);
813 uid_t uid = current_uid();
814 int need_drop_write = 0;
815 long ret;
816
817 switch (cmd) {
818 case NCP_IOC_SETCHARSETS:
819 case NCP_IOC_CONN_LOGGED_IN:
820 case NCP_IOC_SETROOT:
821 if (!capable(CAP_SYS_ADMIN)) {
822 ret = -EACCES;
823 goto out;
824 }
825 break;
826 }
827 if (server->m.mounted_uid != uid) {
828 switch (cmd) {
829 /*
830 * Only mount owner can issue these ioctls. Information
831 * necessary to authenticate to other NDS servers are
832 * stored here.
833 */
834 case NCP_IOC_GETOBJECTNAME:
835 case NCP_IOC_SETOBJECTNAME:
836 case NCP_IOC_GETPRIVATEDATA:
837 case NCP_IOC_SETPRIVATEDATA:
838#ifdef CONFIG_COMPAT
839 case NCP_IOC_GETOBJECTNAME_32:
840 case NCP_IOC_SETOBJECTNAME_32:
841 case NCP_IOC_GETPRIVATEDATA_32:
842 case NCP_IOC_SETPRIVATEDATA_32:
843#endif
844 ret = -EACCES;
845 goto out;
846 /*
847 * These require write access on the inode if user id
848 * does not match. Note that they do not write to the
849 * file... But old code did mnt_want_write, so I keep
850 * it as is. Of course not for mountpoint owner, as
851 * that breaks read-only mounts altogether as ncpmount
852 * needs working NCP_IOC_NCPREQUEST and
853 * NCP_IOC_GET_FS_INFO. Some of these codes (setdentryttl,
854 * signinit, setsignwanted) should be probably restricted
855 * to owner only, or even more to CAP_SYS_ADMIN).
856 */
857 case NCP_IOC_GET_FS_INFO:
858 case NCP_IOC_GET_FS_INFO_V2:
859 case NCP_IOC_NCPREQUEST:
860 case NCP_IOC_SETDENTRYTTL:
861 case NCP_IOC_SIGN_INIT:
862 case NCP_IOC_LOCKUNLOCK:
863 case NCP_IOC_SET_SIGN_WANTED:
864#ifdef CONFIG_COMPAT
865 case NCP_IOC_GET_FS_INFO_V2_32:
866 case NCP_IOC_NCPREQUEST_32:
867#endif
868 ret = mnt_want_write_file(filp);
869 if (ret)
870 goto out;
871 need_drop_write = 1;
872 ret = inode_permission(inode, MAY_WRITE);
873 if (ret)
874 goto outDropWrite;
875 break;
876 /*
877 * Read access required.
878 */
879 case NCP_IOC_GETMOUNTUID16:
880 case NCP_IOC_GETMOUNTUID32:
881 case NCP_IOC_GETMOUNTUID64:
882 case NCP_IOC_GETROOT:
883 case NCP_IOC_SIGN_WANTED:
884 ret = inode_permission(inode, MAY_READ);
885 if (ret)
886 goto out;
887 break;
888 /*
889 * Anybody can read these.
890 */
891 case NCP_IOC_GETCHARSETS:
892 case NCP_IOC_GETDENTRYTTL:
893 default:
894 /* Three codes below are protected by CAP_SYS_ADMIN above. */
895 case NCP_IOC_SETCHARSETS:
896 case NCP_IOC_CONN_LOGGED_IN:
897 case NCP_IOC_SETROOT:
898 break;
899 }
900 }
901 ret = __ncp_ioctl(inode, cmd, arg);
902outDropWrite:
903 if (need_drop_write)
904 mnt_drop_write(filp->f_path.mnt);
905out:
906 return ret;
907}
908
909#ifdef CONFIG_COMPAT
910long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
911{
912 long ret;
913
914 arg = (unsigned long) compat_ptr(arg);
915 ret = ncp_ioctl(file, cmd, arg);
916 return ret;
917}
918#endif