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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
28#define NCP_OBJECT_NAME_MAX_LEN 4096
29
30#define NCP_PRIVATE_DATA_MAX_LEN 8192
31
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
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;
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;
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
157
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
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
298
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
344
345
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 = d_inode(dentry);
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, "d_inode(s_root)==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 = d_inode(dentry);
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, "d_inode(s_root)==NULL\n");
443 result = -EIO;
444 }
445 } else {
446 ncp_dbg(1, "s_root==NULL\n");
447 result = -EIO;
448 }
449 }
450 }
451 mutex_unlock(&server->root_setup_lock);
452
453 return result;
454 }
455
456#ifdef CONFIG_NCPFS_PACKET_SIGNING
457 case NCP_IOC_SIGN_INIT:
458 {
459 struct ncp_sign_init sign;
460
461 if (argp)
462 if (copy_from_user(&sign, argp, sizeof(sign)))
463 return -EFAULT;
464 ncp_lock_server(server);
465 mutex_lock(&server->rcv.creq_mutex);
466 if (argp) {
467 if (server->sign_wanted) {
468 memcpy(server->sign_root,sign.sign_root,8);
469 memcpy(server->sign_last,sign.sign_last,16);
470 server->sign_active = 1;
471 }
472
473 } else {
474 server->sign_active = 0;
475 }
476 mutex_unlock(&server->rcv.creq_mutex);
477 ncp_unlock_server(server);
478 return 0;
479 }
480
481 case NCP_IOC_SIGN_WANTED:
482 {
483 int state;
484
485 ncp_lock_server(server);
486 state = server->sign_wanted;
487 ncp_unlock_server(server);
488 if (put_user(state, (int __user *)argp))
489 return -EFAULT;
490 return 0;
491 }
492
493 case NCP_IOC_SET_SIGN_WANTED:
494 {
495 int newstate;
496
497
498 if (get_user(newstate, (unsigned char __user *)argp))
499 return -EFAULT;
500 result = 0;
501 ncp_lock_server(server);
502 if (server->sign_active) {
503
504 if (!newstate)
505 result = -EINVAL;
506 } else {
507 server->sign_wanted = newstate != 0;
508 }
509 ncp_unlock_server(server);
510 return result;
511 }
512
513#endif
514
515#ifdef CONFIG_NCPFS_IOCTL_LOCKING
516 case NCP_IOC_LOCKUNLOCK:
517 {
518 struct ncp_lock_ioctl rqdata;
519
520 if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
521 return -EFAULT;
522 if (rqdata.origin != 0)
523 return -EINVAL;
524
525 switch (rqdata.cmd) {
526 case NCP_LOCK_EX:
527 case NCP_LOCK_SH:
528 if (rqdata.timeout < 0)
529 return -EINVAL;
530 if (rqdata.timeout == 0)
531 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
532 else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
533 rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
534 break;
535 case NCP_LOCK_LOG:
536 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
537 case NCP_LOCK_CLEAR:
538 break;
539 default:
540 return -EINVAL;
541 }
542
543 if ((result = ncp_make_open(inode, O_RDWR)) != 0)
544 {
545 return result;
546 }
547 result = -EISDIR;
548 if (!S_ISREG(inode->i_mode))
549 goto outrel;
550 if (rqdata.cmd == NCP_LOCK_CLEAR)
551 {
552 result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
553 NCP_FINFO(inode)->file_handle,
554 rqdata.offset,
555 rqdata.length);
556 if (result > 0) result = 0;
557 }
558 else
559 {
560 int lockcmd;
561
562 switch (rqdata.cmd)
563 {
564 case NCP_LOCK_EX: lockcmd=1; break;
565 case NCP_LOCK_SH: lockcmd=3; break;
566 default: lockcmd=0; break;
567 }
568 result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
569 NCP_FINFO(inode)->file_handle,
570 lockcmd,
571 rqdata.offset,
572 rqdata.length,
573 rqdata.timeout);
574 if (result > 0) result = -EAGAIN;
575 }
576outrel:
577 ncp_inode_close(inode);
578 return result;
579 }
580#endif
581
582#ifdef CONFIG_COMPAT
583 case NCP_IOC_GETOBJECTNAME_32:
584 {
585 struct compat_ncp_objectname_ioctl user;
586 size_t outl;
587
588 if (copy_from_user(&user, argp, sizeof(user)))
589 return -EFAULT;
590 down_read(&server->auth_rwsem);
591 user.auth_type = server->auth.auth_type;
592 outl = user.object_name_len;
593 user.object_name_len = server->auth.object_name_len;
594 if (outl > user.object_name_len)
595 outl = user.object_name_len;
596 result = 0;
597 if (outl) {
598 if (copy_to_user(compat_ptr(user.object_name),
599 server->auth.object_name,
600 outl))
601 result = -EFAULT;
602 }
603 up_read(&server->auth_rwsem);
604 if (!result && copy_to_user(argp, &user, sizeof(user)))
605 result = -EFAULT;
606 return result;
607 }
608#endif
609
610 case NCP_IOC_GETOBJECTNAME:
611 {
612 struct ncp_objectname_ioctl user;
613 size_t outl;
614
615 if (copy_from_user(&user, argp, sizeof(user)))
616 return -EFAULT;
617 down_read(&server->auth_rwsem);
618 user.auth_type = server->auth.auth_type;
619 outl = user.object_name_len;
620 user.object_name_len = server->auth.object_name_len;
621 if (outl > user.object_name_len)
622 outl = user.object_name_len;
623 result = 0;
624 if (outl) {
625 if (copy_to_user(user.object_name,
626 server->auth.object_name,
627 outl))
628 result = -EFAULT;
629 }
630 up_read(&server->auth_rwsem);
631 if (!result && copy_to_user(argp, &user, sizeof(user)))
632 result = -EFAULT;
633 return result;
634 }
635
636#ifdef CONFIG_COMPAT
637 case NCP_IOC_SETOBJECTNAME_32:
638#endif
639 case NCP_IOC_SETOBJECTNAME:
640 {
641 struct ncp_objectname_ioctl user;
642 void* newname;
643 void* oldname;
644 size_t oldnamelen;
645 void* oldprivate;
646 size_t oldprivatelen;
647
648#ifdef CONFIG_COMPAT
649 if (cmd == NCP_IOC_SETOBJECTNAME_32) {
650 struct compat_ncp_objectname_ioctl user32;
651 if (copy_from_user(&user32, argp, sizeof(user32)))
652 return -EFAULT;
653 user.auth_type = user32.auth_type;
654 user.object_name_len = user32.object_name_len;
655 user.object_name = compat_ptr(user32.object_name);
656 } else
657#endif
658 if (copy_from_user(&user, argp, sizeof(user)))
659 return -EFAULT;
660
661 if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
662 return -ENOMEM;
663 if (user.object_name_len) {
664 newname = memdup_user(user.object_name,
665 user.object_name_len);
666 if (IS_ERR(newname))
667 return PTR_ERR(newname);
668 } else {
669 newname = NULL;
670 }
671 down_write(&server->auth_rwsem);
672 oldname = server->auth.object_name;
673 oldnamelen = server->auth.object_name_len;
674 oldprivate = server->priv.data;
675 oldprivatelen = server->priv.len;
676 server->auth.auth_type = user.auth_type;
677 server->auth.object_name_len = user.object_name_len;
678 server->auth.object_name = newname;
679 server->priv.len = 0;
680 server->priv.data = NULL;
681 up_write(&server->auth_rwsem);
682 kfree(oldprivate);
683 kfree(oldname);
684 return 0;
685 }
686
687#ifdef CONFIG_COMPAT
688 case NCP_IOC_GETPRIVATEDATA_32:
689#endif
690 case NCP_IOC_GETPRIVATEDATA:
691 {
692 struct ncp_privatedata_ioctl user;
693 size_t outl;
694
695#ifdef CONFIG_COMPAT
696 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
697 struct compat_ncp_privatedata_ioctl user32;
698 if (copy_from_user(&user32, argp, sizeof(user32)))
699 return -EFAULT;
700 user.len = user32.len;
701 user.data = compat_ptr(user32.data);
702 } else
703#endif
704 if (copy_from_user(&user, argp, sizeof(user)))
705 return -EFAULT;
706
707 down_read(&server->auth_rwsem);
708 outl = user.len;
709 user.len = server->priv.len;
710 if (outl > user.len) outl = user.len;
711 result = 0;
712 if (outl) {
713 if (copy_to_user(user.data,
714 server->priv.data,
715 outl))
716 result = -EFAULT;
717 }
718 up_read(&server->auth_rwsem);
719 if (result)
720 return result;
721#ifdef CONFIG_COMPAT
722 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
723 struct compat_ncp_privatedata_ioctl user32;
724 user32.len = user.len;
725 user32.data = (unsigned long) user.data;
726 if (copy_to_user(argp, &user32, sizeof(user32)))
727 return -EFAULT;
728 } else
729#endif
730 if (copy_to_user(argp, &user, sizeof(user)))
731 return -EFAULT;
732
733 return 0;
734 }
735
736#ifdef CONFIG_COMPAT
737 case NCP_IOC_SETPRIVATEDATA_32:
738#endif
739 case NCP_IOC_SETPRIVATEDATA:
740 {
741 struct ncp_privatedata_ioctl user;
742 void* new;
743 void* old;
744 size_t oldlen;
745
746#ifdef CONFIG_COMPAT
747 if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
748 struct compat_ncp_privatedata_ioctl user32;
749 if (copy_from_user(&user32, argp, sizeof(user32)))
750 return -EFAULT;
751 user.len = user32.len;
752 user.data = compat_ptr(user32.data);
753 } else
754#endif
755 if (copy_from_user(&user, argp, sizeof(user)))
756 return -EFAULT;
757
758 if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
759 return -ENOMEM;
760 if (user.len) {
761 new = memdup_user(user.data, user.len);
762 if (IS_ERR(new))
763 return PTR_ERR(new);
764 } else {
765 new = NULL;
766 }
767 down_write(&server->auth_rwsem);
768 old = server->priv.data;
769 oldlen = server->priv.len;
770 server->priv.len = user.len;
771 server->priv.data = new;
772 up_write(&server->auth_rwsem);
773 kfree(old);
774 return 0;
775 }
776
777#ifdef CONFIG_NCPFS_NLS
778 case NCP_IOC_SETCHARSETS:
779 return ncp_set_charsets(server, argp);
780
781 case NCP_IOC_GETCHARSETS:
782 return ncp_get_charsets(server, argp);
783
784#endif
785
786 case NCP_IOC_SETDENTRYTTL:
787 {
788 u_int32_t user;
789
790 if (copy_from_user(&user, argp, sizeof(user)))
791 return -EFAULT;
792
793 if (user > 20000)
794 return -EINVAL;
795 user = (user * HZ) / 1000;
796 atomic_set(&server->dentry_ttl, user);
797 return 0;
798 }
799
800 case NCP_IOC_GETDENTRYTTL:
801 {
802 u_int32_t user = (atomic_read(&server->dentry_ttl) * 1000) / HZ;
803 if (copy_to_user(argp, &user, sizeof(user)))
804 return -EFAULT;
805 return 0;
806 }
807
808 }
809 return -EINVAL;
810}
811
812long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
813{
814 struct inode *inode = file_inode(filp);
815 struct ncp_server *server = NCP_SERVER(inode);
816 kuid_t uid = current_uid();
817 int need_drop_write = 0;
818 long ret;
819
820 switch (cmd) {
821 case NCP_IOC_SETCHARSETS:
822 case NCP_IOC_CONN_LOGGED_IN:
823 case NCP_IOC_SETROOT:
824 if (!capable(CAP_SYS_ADMIN)) {
825 ret = -EPERM;
826 goto out;
827 }
828 break;
829 }
830 if (!uid_eq(server->m.mounted_uid, uid)) {
831 switch (cmd) {
832
833
834
835
836
837 case NCP_IOC_GETOBJECTNAME:
838 case NCP_IOC_SETOBJECTNAME:
839 case NCP_IOC_GETPRIVATEDATA:
840 case NCP_IOC_SETPRIVATEDATA:
841#ifdef CONFIG_COMPAT
842 case NCP_IOC_GETOBJECTNAME_32:
843 case NCP_IOC_SETOBJECTNAME_32:
844 case NCP_IOC_GETPRIVATEDATA_32:
845 case NCP_IOC_SETPRIVATEDATA_32:
846#endif
847 ret = -EACCES;
848 goto out;
849
850
851
852
853
854
855
856
857
858
859
860 case NCP_IOC_GET_FS_INFO:
861 case NCP_IOC_GET_FS_INFO_V2:
862 case NCP_IOC_NCPREQUEST:
863 case NCP_IOC_SETDENTRYTTL:
864 case NCP_IOC_SIGN_INIT:
865 case NCP_IOC_LOCKUNLOCK:
866 case NCP_IOC_SET_SIGN_WANTED:
867#ifdef CONFIG_COMPAT
868 case NCP_IOC_GET_FS_INFO_V2_32:
869 case NCP_IOC_NCPREQUEST_32:
870#endif
871 ret = mnt_want_write_file(filp);
872 if (ret)
873 goto out;
874 need_drop_write = 1;
875 ret = inode_permission(inode, MAY_WRITE);
876 if (ret)
877 goto outDropWrite;
878 break;
879
880
881
882 case NCP_IOC_GETMOUNTUID16:
883 case NCP_IOC_GETMOUNTUID32:
884 case NCP_IOC_GETMOUNTUID64:
885 case NCP_IOC_GETROOT:
886 case NCP_IOC_SIGN_WANTED:
887 ret = inode_permission(inode, MAY_READ);
888 if (ret)
889 goto out;
890 break;
891
892
893
894 case NCP_IOC_GETCHARSETS:
895 case NCP_IOC_GETDENTRYTTL:
896 default:
897
898 case NCP_IOC_SETCHARSETS:
899 case NCP_IOC_CONN_LOGGED_IN:
900 case NCP_IOC_SETROOT:
901 break;
902 }
903 }
904 ret = __ncp_ioctl(inode, cmd, arg);
905outDropWrite:
906 if (need_drop_write)
907 mnt_drop_write_file(filp);
908out:
909 return ret;
910}
911
912#ifdef CONFIG_COMPAT
913long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
914{
915 long ret;
916
917 arg = (unsigned long) compat_ptr(arg);
918 ret = ncp_ioctl(file, cmd, arg);
919 return ret;
920}
921#endif
922
