tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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/highuid.h>
19#include <linux/smp_lock.h>
20#include <linux/vmalloc.h>
21#include <linux/sched.h>
22
23#include <linux/ncp_fs.h>
24
25#include <asm/uaccess.h>
26
27#include "ncplib_kernel.h"
28
29/* maximum limit for ncp_objectname_ioctl */
30#define NCP_OBJECT_NAME_MAX_LEN 4096
31/* maximum limit for ncp_privatedata_ioctl */
32#define NCP_PRIVATE_DATA_MAX_LEN 8192
33/* maximum negotiable packet size */
34#define NCP_PACKET_SIZE_INTERNAL 65536
35
36static int
37ncp_get_fs_info(struct ncp_server * server, struct file *file,
38 struct ncp_fs_info __user *arg)
39{
40 struct inode *inode = file->f_path.dentry->d_inode;
41 struct ncp_fs_info info;
42
43 if (file_permission(file, MAY_WRITE) != 0
44 && current_uid() != server->m.mounted_uid)
45 return -EACCES;
46
47 if (copy_from_user(&info, arg, sizeof(info)))
48 return -EFAULT;
49
50 if (info.version != NCP_GET_FS_INFO_VERSION) {
51 DPRINTK("info.version invalid: %d\n", info.version);
52 return -EINVAL;
53 }
54 /* TODO: info.addr = server->m.serv_addr; */
55 SET_UID(info.mounted_uid, server->m.mounted_uid);
56 info.connection = server->connection;
57 info.buffer_size = server->buffer_size;
58 info.volume_number = NCP_FINFO(inode)->volNumber;
59 info.directory_id = NCP_FINFO(inode)->DosDirNum;
60
61 if (copy_to_user(arg, &info, sizeof(info)))
62 return -EFAULT;
63 return 0;
64}
65
66static int
67ncp_get_fs_info_v2(struct ncp_server * server, struct file *file,
68 struct ncp_fs_info_v2 __user * arg)
69{
70 struct inode *inode = file->f_path.dentry->d_inode;
71 struct ncp_fs_info_v2 info2;
72
73 if (file_permission(file, MAY_WRITE) != 0
74 && current_uid() != server->m.mounted_uid)
75 return -EACCES;
76
77 if (copy_from_user(&info2, arg, sizeof(info2)))
78 return -EFAULT;
79
80 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
81 DPRINTK("info.version invalid: %d\n", info2.version);
82 return -EINVAL;
83 }
84 info2.mounted_uid = server->m.mounted_uid;
85 info2.connection = server->connection;
86 info2.buffer_size = server->buffer_size;
87 info2.volume_number = NCP_FINFO(inode)->volNumber;
88 info2.directory_id = NCP_FINFO(inode)->DosDirNum;
89 info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
90
91 if (copy_to_user(arg, &info2, sizeof(info2)))
92 return -EFAULT;
93 return 0;
94}
95
96#ifdef CONFIG_COMPAT
97struct compat_ncp_objectname_ioctl
98{
99 s32 auth_type;
100 u32 object_name_len;
101 compat_caddr_t object_name; /* a userspace data, in most cases user name */
102};
103
104struct compat_ncp_fs_info_v2 {
105 s32 version;
106 u32 mounted_uid;
107 u32 connection;
108 u32 buffer_size;
109
110 u32 volume_number;
111 u32 directory_id;
112
113 u32 dummy1;
114 u32 dummy2;
115 u32 dummy3;
116};
117
118struct compat_ncp_ioctl_request {
119 u32 function;
120 u32 size;
121 compat_caddr_t data;
122};
123
124struct compat_ncp_privatedata_ioctl
125{
126 u32 len;
127 compat_caddr_t data; /* ~1000 for NDS */
128};
129
130#define NCP_IOC_GET_FS_INFO_V2_32 _IOWR('n', 4, struct compat_ncp_fs_info_v2)
131#define NCP_IOC_NCPREQUEST_32 _IOR('n', 1, struct compat_ncp_ioctl_request)
132#define NCP_IOC_GETOBJECTNAME_32 _IOWR('n', 9, struct compat_ncp_objectname_ioctl)
133#define NCP_IOC_SETOBJECTNAME_32 _IOR('n', 9, struct compat_ncp_objectname_ioctl)
134#define NCP_IOC_GETPRIVATEDATA_32 _IOWR('n', 10, struct compat_ncp_privatedata_ioctl)
135#define NCP_IOC_SETPRIVATEDATA_32 _IOR('n', 10, struct compat_ncp_privatedata_ioctl)
136
137static int
138ncp_get_compat_fs_info_v2(struct ncp_server * server, struct file *file,
139 struct compat_ncp_fs_info_v2 __user * arg)
140{
141 struct inode *inode = file->f_path.dentry->d_inode;
142 struct compat_ncp_fs_info_v2 info2;
143
144 if (file_permission(file, MAY_WRITE) != 0
145 && current_uid() != server->m.mounted_uid)
146 return -EACCES;
147
148 if (copy_from_user(&info2, arg, sizeof(info2)))
149 return -EFAULT;
150
151 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
152 DPRINTK("info.version invalid: %d\n", info2.version);
153 return -EINVAL;
154 }
155 info2.mounted_uid = server->m.mounted_uid;
156 info2.connection = server->connection;
157 info2.buffer_size = server->buffer_size;
158 info2.volume_number = NCP_FINFO(inode)->volNumber;
159 info2.directory_id = NCP_FINFO(inode)->DosDirNum;
160 info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
161
162 if (copy_to_user(arg, &info2, sizeof(info2)))
163 return -EFAULT;
164 return 0;
165}
166#endif
167
168#define NCP_IOC_GETMOUNTUID16 _IOW('n', 2, u16)
169#define NCP_IOC_GETMOUNTUID32 _IOW('n', 2, u32)
170#define NCP_IOC_GETMOUNTUID64 _IOW('n', 2, u64)
171
172#ifdef CONFIG_NCPFS_NLS
173/* Here we are select the iocharset and the codepage for NLS.
174 * Thanks Petr Vandrovec for idea and many hints.
175 */
176static int
177ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
178{
179 struct ncp_nls_ioctl user;
180 struct nls_table *codepage;
181 struct nls_table *iocharset;
182 struct nls_table *oldset_io;
183 struct nls_table *oldset_cp;
184
185 if (!capable(CAP_SYS_ADMIN))
186 return -EACCES;
187 if (server->root_setuped)
188 return -EBUSY;
189
190 if (copy_from_user(&user, arg, sizeof(user)))
191 return -EFAULT;
192
193 codepage = NULL;
194 user.codepage[NCP_IOCSNAME_LEN] = 0;
195 if (!user.codepage[0] || !strcmp(user.codepage, "default"))
196 codepage = load_nls_default();
197 else {
198 codepage = load_nls(user.codepage);
199 if (!codepage) {
200 return -EBADRQC;
201 }
202 }
203
204 iocharset = NULL;
205 user.iocharset[NCP_IOCSNAME_LEN] = 0;
206 if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
207 iocharset = load_nls_default();
208 NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
209 } else if (!strcmp(user.iocharset, "utf8")) {
210 iocharset = load_nls_default();
211 NCP_SET_FLAG(server, NCP_FLAG_UTF8);
212 } else {
213 iocharset = load_nls(user.iocharset);
214 if (!iocharset) {
215 unload_nls(codepage);
216 return -EBADRQC;
217 }
218 NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
219 }
220
221 oldset_cp = server->nls_vol;
222 server->nls_vol = codepage;
223 oldset_io = server->nls_io;
224 server->nls_io = iocharset;
225
226 unload_nls(oldset_cp);
227 unload_nls(oldset_io);
228
229 return 0;
230}
231
232static int
233ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
234{
235 struct ncp_nls_ioctl user;
236 int len;
237
238 memset(&user, 0, sizeof(user));
239 if (server->nls_vol && server->nls_vol->charset) {
240 len = strlen(server->nls_vol->charset);
241 if (len > NCP_IOCSNAME_LEN)
242 len = NCP_IOCSNAME_LEN;
243 strncpy(user.codepage, server->nls_vol->charset, len);
244 user.codepage[len] = 0;
245 }
246
247 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8))
248 strcpy(user.iocharset, "utf8");
249 else if (server->nls_io && server->nls_io->charset) {
250 len = strlen(server->nls_io->charset);
251 if (len > NCP_IOCSNAME_LEN)
252 len = NCP_IOCSNAME_LEN;
253 strncpy(user.iocharset, server->nls_io->charset, len);
254 user.iocharset[len] = 0;
255 }
256
257 if (copy_to_user(arg, &user, sizeof(user)))
258 return -EFAULT;
259 return 0;
260}
261#endif /* CONFIG_NCPFS_NLS */
262
263static int __ncp_ioctl(struct inode *inode, struct file *filp,
264 unsigned int cmd, unsigned long arg)
265{
266 struct ncp_server *server = NCP_SERVER(inode);
267 int result;
268 struct ncp_ioctl_request request;
269 char* bouncebuffer;
270 void __user *argp = (void __user *)arg;
271 uid_t uid = current_uid();
272
273 switch (cmd) {
274#ifdef CONFIG_COMPAT
275 case NCP_IOC_NCPREQUEST_32:
276#endif
277 case NCP_IOC_NCPREQUEST:
278 if (file_permission(filp, MAY_WRITE) != 0
279 && uid != server->m.mounted_uid)
280 return -EACCES;
281
282#ifdef CONFIG_COMPAT
283 if (cmd == NCP_IOC_NCPREQUEST_32) {
284 struct compat_ncp_ioctl_request request32;
285 if (copy_from_user(&request32, argp, sizeof(request32)))
286 return -EFAULT;
287 request.function = request32.function;
288 request.size = request32.size;
289 request.data = compat_ptr(request32.data);
290 } else
291#endif
292 if (copy_from_user(&request, argp, sizeof(request)))
293 return -EFAULT;
294
295 if ((request.function > 255)
296 || (request.size >
297 NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
298 return -EINVAL;
299 }
300 bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
301 if (!bouncebuffer)
302 return -ENOMEM;
303 if (copy_from_user(bouncebuffer, request.data, request.size)) {
304 vfree(bouncebuffer);
305 return -EFAULT;
306 }
307 ncp_lock_server(server);
308
309 /* FIXME: We hack around in the server's structures
310 here to be able to use ncp_request */
311
312 server->has_subfunction = 0;
313 server->current_size = request.size;
314 memcpy(server->packet, bouncebuffer, request.size);
315
316 result = ncp_request2(server, request.function,
317 bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
318 if (result < 0)
319 result = -EIO;
320 else
321 result = server->reply_size;
322 ncp_unlock_server(server);
323 DPRINTK("ncp_ioctl: copy %d bytes\n",
324 result);
325 if (result >= 0)
326 if (copy_to_user(request.data, bouncebuffer, result))
327 result = -EFAULT;
328 vfree(bouncebuffer);
329 return result;
330
331 case NCP_IOC_CONN_LOGGED_IN:
332
333 if (!capable(CAP_SYS_ADMIN))
334 return -EACCES;
335 if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
336 return -EINVAL;
337 if (server->root_setuped)
338 return -EBUSY;
339 server->root_setuped = 1;
340 return ncp_conn_logged_in(inode->i_sb);
341
342 case NCP_IOC_GET_FS_INFO:
343 return ncp_get_fs_info(server, filp, argp);
344
345 case NCP_IOC_GET_FS_INFO_V2:
346 return ncp_get_fs_info_v2(server, filp, argp);
347
348#ifdef CONFIG_COMPAT
349 case NCP_IOC_GET_FS_INFO_V2_32:
350 return ncp_get_compat_fs_info_v2(server, filp, argp);
351#endif
352 /* we have too many combinations of CONFIG_COMPAT,
353 * CONFIG_64BIT and CONFIG_UID16, so just handle
354 * any of the possible ioctls */
355 case NCP_IOC_GETMOUNTUID16:
356 case NCP_IOC_GETMOUNTUID32:
357 case NCP_IOC_GETMOUNTUID64:
358 if (file_permission(filp, MAY_READ) != 0
359 && uid != server->m.mounted_uid)
360 return -EACCES;
361
362 if (cmd == NCP_IOC_GETMOUNTUID16) {
363 u16 uid;
364 SET_UID(uid, server->m.mounted_uid);
365 if (put_user(uid, (u16 __user *)argp))
366 return -EFAULT;
367 } else if (cmd == NCP_IOC_GETMOUNTUID32) {
368 if (put_user(server->m.mounted_uid,
369 (u32 __user *)argp))
370 return -EFAULT;
371 } else {
372 if (put_user(server->m.mounted_uid,
373 (u64 __user *)argp))
374 return -EFAULT;
375 }
376 return 0;
377
378 case NCP_IOC_GETROOT:
379 {
380 struct ncp_setroot_ioctl sr;
381
382 if (file_permission(filp, MAY_READ) != 0
383 && uid != server->m.mounted_uid)
384 return -EACCES;
385
386 if (server->m.mounted_vol[0]) {
387 struct dentry* dentry = inode->i_sb->s_root;
388
389 if (dentry) {
390 struct inode* s_inode = dentry->d_inode;
391
392 if (s_inode) {
393 sr.volNumber = NCP_FINFO(s_inode)->volNumber;
394 sr.dirEntNum = NCP_FINFO(s_inode)->dirEntNum;
395 sr.namespace = server->name_space[sr.volNumber];
396 } else
397 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
398 } else
399 DPRINTK("ncpfs: s_root==NULL\n");
400 } else {
401 sr.volNumber = -1;
402 sr.namespace = 0;
403 sr.dirEntNum = 0;
404 }
405 if (copy_to_user(argp, &sr, sizeof(sr)))
406 return -EFAULT;
407 return 0;
408 }
409
410 case NCP_IOC_SETROOT:
411 {
412 struct ncp_setroot_ioctl sr;
413 __u32 vnum;
414 __le32 de;
415 __le32 dosde;
416 struct dentry* dentry;
417
418 if (!capable(CAP_SYS_ADMIN))
419 {
420 return -EACCES;
421 }
422 if (server->root_setuped) return -EBUSY;
423 if (copy_from_user(&sr, argp, sizeof(sr)))
424 return -EFAULT;
425 if (sr.volNumber < 0) {
426 server->m.mounted_vol[0] = 0;
427 vnum = NCP_NUMBER_OF_VOLUMES;
428 de = 0;
429 dosde = 0;
430 } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
431 return -EINVAL;
432 } else if (ncp_mount_subdir(server, sr.volNumber,
433 sr.namespace, sr.dirEntNum,
434 &vnum, &de, &dosde)) {
435 return -ENOENT;
436 }
437
438 dentry = inode->i_sb->s_root;
439 server->root_setuped = 1;
440 if (dentry) {
441 struct inode* s_inode = dentry->d_inode;
442
443 if (s_inode) {
444 NCP_FINFO(s_inode)->volNumber = vnum;
445 NCP_FINFO(s_inode)->dirEntNum = de;
446 NCP_FINFO(s_inode)->DosDirNum = dosde;
447 } else
448 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
449 } else
450 DPRINTK("ncpfs: s_root==NULL\n");
451
452 return 0;
453 }
454
455#ifdef CONFIG_NCPFS_PACKET_SIGNING
456 case NCP_IOC_SIGN_INIT:
457 if (file_permission(filp, MAY_WRITE) != 0
458 && uid != server->m.mounted_uid)
459 return -EACCES;
460
461 if (argp) {
462 if (server->sign_wanted)
463 {
464 struct ncp_sign_init sign;
465
466 if (copy_from_user(&sign, argp, sizeof(sign)))
467 return -EFAULT;
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 /* ignore when signatures not wanted */
473 } else {
474 server->sign_active = 0;
475 }
476 return 0;
477
478 case NCP_IOC_SIGN_WANTED:
479 if (file_permission(filp, MAY_READ) != 0
480 && uid != server->m.mounted_uid)
481 return -EACCES;
482
483 if (put_user(server->sign_wanted, (int __user *)argp))
484 return -EFAULT;
485 return 0;
486
487 case NCP_IOC_SET_SIGN_WANTED:
488 {
489 int newstate;
490
491 if (file_permission(filp, MAY_WRITE) != 0
492 && uid != server->m.mounted_uid)
493 return -EACCES;
494
495 /* get only low 8 bits... */
496 if (get_user(newstate, (unsigned char __user *)argp))
497 return -EFAULT;
498 if (server->sign_active) {
499 /* cannot turn signatures OFF when active */
500 if (!newstate) return -EINVAL;
501 } else {
502 server->sign_wanted = newstate != 0;
503 }
504 return 0;
505 }
506
507#endif /* CONFIG_NCPFS_PACKET_SIGNING */
508
509#ifdef CONFIG_NCPFS_IOCTL_LOCKING
510 case NCP_IOC_LOCKUNLOCK:
511 if (file_permission(filp, MAY_WRITE) != 0
512 && uid != server->m.mounted_uid)
513 return -EACCES;
514
515 {
516 struct ncp_lock_ioctl rqdata;
517
518 if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
519 return -EFAULT;
520 if (rqdata.origin != 0)
521 return -EINVAL;
522 /* check for cmd */
523 switch (rqdata.cmd) {
524 case NCP_LOCK_EX:
525 case NCP_LOCK_SH:
526 if (rqdata.timeout == 0)
527 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
528 else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
529 rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
530 break;
531 case NCP_LOCK_LOG:
532 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */
533 case NCP_LOCK_CLEAR:
534 break;
535 default:
536 return -EINVAL;
537 }
538 /* locking needs both read and write access */
539 if ((result = ncp_make_open(inode, O_RDWR)) != 0)
540 {
541 return result;
542 }
543 result = -EIO;
544 if (!ncp_conn_valid(server))
545 goto outrel;
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 if (uid != server->m.mounted_uid)
584 return -EACCES;
585 {
586 struct compat_ncp_objectname_ioctl user;
587 size_t outl;
588
589 if (copy_from_user(&user, argp, sizeof(user)))
590 return -EFAULT;
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 if (outl) {
597 if (copy_to_user(compat_ptr(user.object_name),
598 server->auth.object_name,
599 outl)) return -EFAULT;
600 }
601 if (copy_to_user(argp, &user, sizeof(user)))
602 return -EFAULT;
603 return 0;
604 }
605#endif
606
607 case NCP_IOC_GETOBJECTNAME:
608 if (uid != server->m.mounted_uid)
609 return -EACCES;
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 user.auth_type = server->auth.auth_type;
617 outl = user.object_name_len;
618 user.object_name_len = server->auth.object_name_len;
619 if (outl > user.object_name_len)
620 outl = user.object_name_len;
621 if (outl) {
622 if (copy_to_user(user.object_name,
623 server->auth.object_name,
624 outl)) return -EFAULT;
625 }
626 if (copy_to_user(argp, &user, sizeof(user)))
627 return -EFAULT;
628 return 0;
629 }
630
631#ifdef CONFIG_COMPAT
632 case NCP_IOC_SETOBJECTNAME_32:
633#endif
634 case NCP_IOC_SETOBJECTNAME:
635 if (uid != server->m.mounted_uid)
636 return -EACCES;
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 /* enter critical section */
669 /* maybe that kfree can sleep so do that this way */
670 /* it is at least more SMP friendly (in future...) */
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 /* leave critical section */
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 if (uid != server->m.mounted_uid)
691 return -EACCES;
692 {
693 struct ncp_privatedata_ioctl user;
694 size_t outl;
695
696#ifdef CONFIG_COMPAT
697 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
698 struct compat_ncp_privatedata_ioctl user32;
699 if (copy_from_user(&user32, argp, sizeof(user32)))
700 return -EFAULT;
701 user.len = user32.len;
702 user.data = compat_ptr(user32.data);
703 } else
704#endif
705 if (copy_from_user(&user, argp, sizeof(user)))
706 return -EFAULT;
707
708 outl = user.len;
709 user.len = server->priv.len;
710 if (outl > user.len) outl = user.len;
711 if (outl) {
712 if (copy_to_user(user.data,
713 server->priv.data,
714 outl)) return -EFAULT;
715 }
716#ifdef CONFIG_COMPAT
717 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
718 struct compat_ncp_privatedata_ioctl user32;
719 user32.len = user.len;
720 user32.data = (unsigned long) user.data;
721 if (copy_to_user(argp, &user32, sizeof(user32)))
722 return -EFAULT;
723 } else
724#endif
725 if (copy_to_user(argp, &user, sizeof(user)))
726 return -EFAULT;
727
728 return 0;
729 }
730
731#ifdef CONFIG_COMPAT
732 case NCP_IOC_SETPRIVATEDATA_32:
733#endif
734 case NCP_IOC_SETPRIVATEDATA:
735 if (uid != server->m.mounted_uid)
736 return -EACCES;
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 /* enter critical section */
765 old = server->priv.data;
766 oldlen = server->priv.len;
767 server->priv.len = user.len;
768 server->priv.data = new;
769 /* leave critical section */
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 if (file_permission(filp, MAY_WRITE) != 0 &&
785 uid != server->m.mounted_uid)
786 return -EACCES;
787
788 {
789 u_int32_t user;
790
791 if (copy_from_user(&user, argp, sizeof(user)))
792 return -EFAULT;
793 /* 20 secs at most... */
794 if (user > 20000)
795 return -EINVAL;
796 user = (user * HZ) / 1000;
797 server->dentry_ttl = user;
798 return 0;
799 }
800
801 case NCP_IOC_GETDENTRYTTL:
802 {
803 u_int32_t user = (server->dentry_ttl * 1000) / HZ;
804 if (copy_to_user(argp, &user, sizeof(user)))
805 return -EFAULT;
806 return 0;
807 }
808
809 }
810 return -EINVAL;
811}
812
813static int ncp_ioctl_need_write(unsigned int cmd)
814{
815 switch (cmd) {
816 case NCP_IOC_GET_FS_INFO:
817 case NCP_IOC_GET_FS_INFO_V2:
818 case NCP_IOC_NCPREQUEST:
819 case NCP_IOC_SETDENTRYTTL:
820 case NCP_IOC_SIGN_INIT:
821 case NCP_IOC_LOCKUNLOCK:
822 case NCP_IOC_SET_SIGN_WANTED:
823 return 1;
824 case NCP_IOC_GETOBJECTNAME:
825 case NCP_IOC_SETOBJECTNAME:
826 case NCP_IOC_GETPRIVATEDATA:
827 case NCP_IOC_SETPRIVATEDATA:
828 case NCP_IOC_SETCHARSETS:
829 case NCP_IOC_GETCHARSETS:
830 case NCP_IOC_CONN_LOGGED_IN:
831 case NCP_IOC_GETDENTRYTTL:
832 case NCP_IOC_GETMOUNTUID2:
833 case NCP_IOC_SIGN_WANTED:
834 case NCP_IOC_GETROOT:
835 case NCP_IOC_SETROOT:
836 return 0;
837 default:
838 /* unkown IOCTL command, assume write */
839 return 1;
840 }
841}
842
843int ncp_ioctl(struct inode *inode, struct file *filp,
844 unsigned int cmd, unsigned long arg)
845{
846 int ret;
847
848 if (ncp_ioctl_need_write(cmd)) {
849 /*
850 * inside the ioctl(), any failures which
851 * are because of file_permission() are
852 * -EACCESS, so it seems consistent to keep
853 * that here.
854 */
855 if (mnt_want_write(filp->f_path.mnt))
856 return -EACCES;
857 }
858 ret = __ncp_ioctl(inode, filp, cmd, arg);
859 if (ncp_ioctl_need_write(cmd))
860 mnt_drop_write(filp->f_path.mnt);
861 return ret;
862}
863
864#ifdef CONFIG_COMPAT
865long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
866{
867 struct inode *inode = file->f_path.dentry->d_inode;
868 int ret;
869
870 lock_kernel();
871 arg = (unsigned long) compat_ptr(arg);
872 ret = ncp_ioctl(inode, file, cmd, arg);
873 unlock_kernel();
874 return ret;
875}
876#endif