blob: d40a547e337707da380e752864926a65c70013cc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Randy Dunlap16f7e0f2006-01-11 12:17:46 -080010#include <linux/capability.h>
Petr Vandrovec54f67f62006-09-30 23:27:55 -070011#include <linux/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/errno.h>
13#include <linux/fs.h>
14#include <linux/ioctl.h>
15#include <linux/time.h>
16#include <linux/mm.h>
Dave Hansena761a1c2008-02-15 14:37:39 -080017#include <linux/mount.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090018#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/highuid.h>
20#include <linux/vmalloc.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040021#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#include <linux/ncp_fs.h>
24
Petr Vandrovec54f67f62006-09-30 23:27:55 -070025#include <asm/uaccess.h>
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#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
Petr Vandrovec2e54eb92010-09-27 01:47:33 +020037ncp_get_fs_info(struct ncp_server * server, struct inode *inode,
Christoph Hellwig8c744fb2005-11-08 21:35:04 -080038 struct ncp_fs_info __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -070039{
40 struct ncp_fs_info info;
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 if (copy_from_user(&info, arg, sizeof(info)))
43 return -EFAULT;
44
45 if (info.version != NCP_GET_FS_INFO_VERSION) {
46 DPRINTK("info.version invalid: %d\n", info.version);
47 return -EINVAL;
48 }
49 /* TODO: info.addr = server->m.serv_addr; */
50 SET_UID(info.mounted_uid, server->m.mounted_uid);
51 info.connection = server->connection;
52 info.buffer_size = server->buffer_size;
53 info.volume_number = NCP_FINFO(inode)->volNumber;
54 info.directory_id = NCP_FINFO(inode)->DosDirNum;
55
56 if (copy_to_user(arg, &info, sizeof(info)))
57 return -EFAULT;
58 return 0;
59}
60
61static int
Petr Vandrovec2e54eb92010-09-27 01:47:33 +020062ncp_get_fs_info_v2(struct ncp_server * server, struct inode *inode,
Christoph Hellwig8c744fb2005-11-08 21:35:04 -080063 struct ncp_fs_info_v2 __user * arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064{
65 struct ncp_fs_info_v2 info2;
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 if (copy_from_user(&info2, arg, sizeof(info2)))
68 return -EFAULT;
69
70 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
71 DPRINTK("info.version invalid: %d\n", info2.version);
72 return -EINVAL;
73 }
74 info2.mounted_uid = server->m.mounted_uid;
75 info2.connection = server->connection;
76 info2.buffer_size = server->buffer_size;
77 info2.volume_number = NCP_FINFO(inode)->volNumber;
78 info2.directory_id = NCP_FINFO(inode)->DosDirNum;
79 info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
80
81 if (copy_to_user(arg, &info2, sizeof(info2)))
82 return -EFAULT;
83 return 0;
84}
85
Petr Vandrovec54f67f62006-09-30 23:27:55 -070086#ifdef CONFIG_COMPAT
87struct compat_ncp_objectname_ioctl
88{
89 s32 auth_type;
90 u32 object_name_len;
Frederik Schwarzer0211a9c2008-12-29 22:14:56 +010091 compat_caddr_t object_name; /* a userspace data, in most cases user name */
Petr Vandrovec54f67f62006-09-30 23:27:55 -070092};
93
94struct compat_ncp_fs_info_v2 {
95 s32 version;
96 u32 mounted_uid;
97 u32 connection;
98 u32 buffer_size;
99
100 u32 volume_number;
101 u32 directory_id;
102
103 u32 dummy1;
104 u32 dummy2;
105 u32 dummy3;
106};
107
108struct compat_ncp_ioctl_request {
109 u32 function;
110 u32 size;
111 compat_caddr_t data;
112};
113
114struct compat_ncp_privatedata_ioctl
115{
116 u32 len;
117 compat_caddr_t data; /* ~1000 for NDS */
118};
119
120#define NCP_IOC_GET_FS_INFO_V2_32 _IOWR('n', 4, struct compat_ncp_fs_info_v2)
121#define NCP_IOC_NCPREQUEST_32 _IOR('n', 1, struct compat_ncp_ioctl_request)
122#define NCP_IOC_GETOBJECTNAME_32 _IOWR('n', 9, struct compat_ncp_objectname_ioctl)
123#define NCP_IOC_SETOBJECTNAME_32 _IOR('n', 9, struct compat_ncp_objectname_ioctl)
124#define NCP_IOC_GETPRIVATEDATA_32 _IOWR('n', 10, struct compat_ncp_privatedata_ioctl)
125#define NCP_IOC_SETPRIVATEDATA_32 _IOR('n', 10, struct compat_ncp_privatedata_ioctl)
126
127static int
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200128ncp_get_compat_fs_info_v2(struct ncp_server * server, struct inode *inode,
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700129 struct compat_ncp_fs_info_v2 __user * arg)
130{
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700131 struct compat_ncp_fs_info_v2 info2;
132
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700133 if (copy_from_user(&info2, arg, sizeof(info2)))
134 return -EFAULT;
135
136 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
137 DPRINTK("info.version invalid: %d\n", info2.version);
138 return -EINVAL;
139 }
140 info2.mounted_uid = server->m.mounted_uid;
141 info2.connection = server->connection;
142 info2.buffer_size = server->buffer_size;
143 info2.volume_number = NCP_FINFO(inode)->volNumber;
144 info2.directory_id = NCP_FINFO(inode)->DosDirNum;
145 info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
146
147 if (copy_to_user(arg, &info2, sizeof(info2)))
148 return -EFAULT;
149 return 0;
150}
151#endif
152
153#define NCP_IOC_GETMOUNTUID16 _IOW('n', 2, u16)
154#define NCP_IOC_GETMOUNTUID32 _IOW('n', 2, u32)
155#define NCP_IOC_GETMOUNTUID64 _IOW('n', 2, u64)
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157#ifdef CONFIG_NCPFS_NLS
158/* Here we are select the iocharset and the codepage for NLS.
159 * Thanks Petr Vandrovec for idea and many hints.
160 */
161static int
162ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
163{
164 struct ncp_nls_ioctl user;
165 struct nls_table *codepage;
166 struct nls_table *iocharset;
167 struct nls_table *oldset_io;
168 struct nls_table *oldset_cp;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200169 int utf8;
170 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
172 if (copy_from_user(&user, arg, sizeof(user)))
173 return -EFAULT;
174
175 codepage = NULL;
176 user.codepage[NCP_IOCSNAME_LEN] = 0;
177 if (!user.codepage[0] || !strcmp(user.codepage, "default"))
178 codepage = load_nls_default();
179 else {
180 codepage = load_nls(user.codepage);
181 if (!codepage) {
182 return -EBADRQC;
183 }
184 }
185
186 iocharset = NULL;
187 user.iocharset[NCP_IOCSNAME_LEN] = 0;
188 if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
189 iocharset = load_nls_default();
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200190 utf8 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 } else if (!strcmp(user.iocharset, "utf8")) {
192 iocharset = load_nls_default();
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200193 utf8 = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 } else {
195 iocharset = load_nls(user.iocharset);
196 if (!iocharset) {
197 unload_nls(codepage);
198 return -EBADRQC;
199 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200200 utf8 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 }
202
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200203 mutex_lock(&server->root_setup_lock);
204 if (server->root_setuped) {
205 oldset_cp = codepage;
206 oldset_io = iocharset;
207 err = -EBUSY;
208 } else {
209 if (utf8)
210 NCP_SET_FLAG(server, NCP_FLAG_UTF8);
211 else
212 NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
213 oldset_cp = server->nls_vol;
214 server->nls_vol = codepage;
215 oldset_io = server->nls_io;
216 server->nls_io = iocharset;
217 err = 0;
218 }
219 mutex_unlock(&server->root_setup_lock);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000220 unload_nls(oldset_cp);
221 unload_nls(oldset_io);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200223 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
226static int
227ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
228{
229 struct ncp_nls_ioctl user;
230 int len;
231
232 memset(&user, 0, sizeof(user));
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200233 mutex_lock(&server->root_setup_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 if (server->nls_vol && server->nls_vol->charset) {
235 len = strlen(server->nls_vol->charset);
236 if (len > NCP_IOCSNAME_LEN)
237 len = NCP_IOCSNAME_LEN;
238 strncpy(user.codepage, server->nls_vol->charset, len);
239 user.codepage[len] = 0;
240 }
241
242 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8))
243 strcpy(user.iocharset, "utf8");
244 else if (server->nls_io && server->nls_io->charset) {
245 len = strlen(server->nls_io->charset);
246 if (len > NCP_IOCSNAME_LEN)
247 len = NCP_IOCSNAME_LEN;
248 strncpy(user.iocharset, server->nls_io->charset, len);
249 user.iocharset[len] = 0;
250 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200251 mutex_unlock(&server->root_setup_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
253 if (copy_to_user(arg, &user, sizeof(user)))
254 return -EFAULT;
255 return 0;
256}
257#endif /* CONFIG_NCPFS_NLS */
258
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200259static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260{
261 struct ncp_server *server = NCP_SERVER(inode);
262 int result;
263 struct ncp_ioctl_request request;
264 char* bouncebuffer;
265 void __user *argp = (void __user *)arg;
266
267 switch (cmd) {
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700268#ifdef CONFIG_COMPAT
269 case NCP_IOC_NCPREQUEST_32:
270#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 case NCP_IOC_NCPREQUEST:
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700272#ifdef CONFIG_COMPAT
273 if (cmd == NCP_IOC_NCPREQUEST_32) {
274 struct compat_ncp_ioctl_request request32;
275 if (copy_from_user(&request32, argp, sizeof(request32)))
276 return -EFAULT;
277 request.function = request32.function;
278 request.size = request32.size;
279 request.data = compat_ptr(request32.data);
280 } else
281#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 if (copy_from_user(&request, argp, sizeof(request)))
283 return -EFAULT;
284
285 if ((request.function > 255)
286 || (request.size >
287 NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
288 return -EINVAL;
289 }
290 bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
291 if (!bouncebuffer)
292 return -ENOMEM;
293 if (copy_from_user(bouncebuffer, request.data, request.size)) {
294 vfree(bouncebuffer);
295 return -EFAULT;
296 }
297 ncp_lock_server(server);
298
299 /* FIXME: We hack around in the server's structures
300 here to be able to use ncp_request */
301
302 server->has_subfunction = 0;
303 server->current_size = request.size;
304 memcpy(server->packet, bouncebuffer, request.size);
305
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200306 result = ncp_request2(server, request.function,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
308 if (result < 0)
309 result = -EIO;
310 else
311 result = server->reply_size;
312 ncp_unlock_server(server);
313 DPRINTK("ncp_ioctl: copy %d bytes\n",
314 result);
315 if (result >= 0)
316 if (copy_to_user(request.data, bouncebuffer, result))
317 result = -EFAULT;
318 vfree(bouncebuffer);
319 return result;
320
321 case NCP_IOC_CONN_LOGGED_IN:
322
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
324 return -EINVAL;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200325 mutex_lock(&server->root_setup_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 if (server->root_setuped)
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200327 result = -EBUSY;
328 else {
329 result = ncp_conn_logged_in(inode->i_sb);
330 if (result == 0)
331 server->root_setuped = 1;
332 }
333 mutex_unlock(&server->root_setup_lock);
334 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336 case NCP_IOC_GET_FS_INFO:
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200337 return ncp_get_fs_info(server, inode, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 case NCP_IOC_GET_FS_INFO_V2:
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200340 return ncp_get_fs_info_v2(server, inode, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700342#ifdef CONFIG_COMPAT
343 case NCP_IOC_GET_FS_INFO_V2_32:
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200344 return ncp_get_compat_fs_info_v2(server, inode, argp);
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700345#endif
346 /* we have too many combinations of CONFIG_COMPAT,
347 * CONFIG_64BIT and CONFIG_UID16, so just handle
348 * any of the possible ioctls */
349 case NCP_IOC_GETMOUNTUID16:
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200350 {
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700351 u16 uid;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200352
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700353 SET_UID(uid, server->m.mounted_uid);
354 if (put_user(uid, (u16 __user *)argp))
355 return -EFAULT;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200356 return 0;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700357 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200358 case NCP_IOC_GETMOUNTUID32:
359 if (put_user(server->m.mounted_uid,
360 (u32 __user *)argp))
361 return -EFAULT;
362 return 0;
363 case NCP_IOC_GETMOUNTUID64:
364 if (put_user(server->m.mounted_uid,
365 (u64 __user *)argp))
366 return -EFAULT;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700367 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369 case NCP_IOC_GETROOT:
370 {
371 struct ncp_setroot_ioctl sr;
372
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200373 result = -EACCES;
374 mutex_lock(&server->root_setup_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 if (server->m.mounted_vol[0]) {
376 struct dentry* dentry = inode->i_sb->s_root;
377
378 if (dentry) {
Harvey Harrison305787e2008-04-28 02:14:00 -0700379 struct inode* s_inode = dentry->d_inode;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200380
Harvey Harrison305787e2008-04-28 02:14:00 -0700381 if (s_inode) {
382 sr.volNumber = NCP_FINFO(s_inode)->volNumber;
383 sr.dirEntNum = NCP_FINFO(s_inode)->dirEntNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 sr.namespace = server->name_space[sr.volNumber];
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200385 result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 } else
387 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
388 } else
389 DPRINTK("ncpfs: s_root==NULL\n");
390 } else {
391 sr.volNumber = -1;
392 sr.namespace = 0;
393 sr.dirEntNum = 0;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200394 result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200396 mutex_unlock(&server->root_setup_lock);
397 if (!result && copy_to_user(argp, &sr, sizeof(sr)))
398 result = -EFAULT;
399 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 }
David Howells48937022008-11-14 10:38:58 +1100401
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 if (copy_from_user(&sr, argp, sizeof(sr)))
411 return -EFAULT;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200412 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 } else
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200429 result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200431 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 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
443 result = -EIO;
444 }
445 } else {
446 DPRINTK("ncpfs: 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 return 0;
480 }
481
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 case NCP_IOC_SIGN_WANTED:
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200483 {
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 }
David Howells48937022008-11-14 10:38:58 +1100493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 case NCP_IOC_SET_SIGN_WANTED:
495 {
496 int newstate;
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 /* get only low 8 bits... */
499 if (get_user(newstate, (unsigned char __user *)argp))
500 return -EFAULT;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200501 result = 0;
502 ncp_lock_server(server);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 if (server->sign_active) {
504 /* cannot turn signatures OFF when active */
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200505 if (!newstate)
506 result = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 } else {
508 server->sign_wanted = newstate != 0;
509 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200510 ncp_unlock_server(server);
511 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 }
513
514#endif /* CONFIG_NCPFS_PACKET_SIGNING */
515
516#ifdef CONFIG_NCPFS_IOCTL_LOCKING
517 case NCP_IOC_LOCKUNLOCK:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 {
519 struct ncp_lock_ioctl rqdata;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 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),
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200552 NCP_FINFO(inode)->file_handle,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 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 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200575outrel:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 ncp_inode_close(inode);
577 return result;
578 }
579#endif /* CONFIG_NCPFS_IOCTL_LOCKING */
580
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700581#ifdef CONFIG_COMPAT
582 case NCP_IOC_GETOBJECTNAME_32:
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700583 {
584 struct compat_ncp_objectname_ioctl user;
585 size_t outl;
586
587 if (copy_from_user(&user, argp, sizeof(user)))
588 return -EFAULT;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200589 down_read(&server->auth_rwsem);
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700590 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;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200595 result = 0;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700596 if (outl) {
597 if (copy_to_user(compat_ptr(user.object_name),
598 server->auth.object_name,
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200599 outl))
600 result = -EFAULT;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700601 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200602 up_read(&server->auth_rwsem);
603 if (!result && copy_to_user(argp, &user, sizeof(user)))
604 result = -EFAULT;
605 return result;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700606 }
607#endif
David Howells48937022008-11-14 10:38:58 +1100608
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 case NCP_IOC_GETOBJECTNAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 {
611 struct ncp_objectname_ioctl user;
612 size_t outl;
613
614 if (copy_from_user(&user, argp, sizeof(user)))
615 return -EFAULT;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200616 down_read(&server->auth_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 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;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200622 result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 if (outl) {
624 if (copy_to_user(user.object_name,
625 server->auth.object_name,
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200626 outl))
627 result = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200629 up_read(&server->auth_rwsem);
630 if (!result && copy_to_user(argp, &user, sizeof(user)))
631 result = -EFAULT;
632 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 }
David Howells48937022008-11-14 10:38:58 +1100634
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700635#ifdef CONFIG_COMPAT
636 case NCP_IOC_SETOBJECTNAME_32:
637#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 case NCP_IOC_SETOBJECTNAME:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 {
640 struct ncp_objectname_ioctl user;
641 void* newname;
642 void* oldname;
643 size_t oldnamelen;
644 void* oldprivate;
645 size_t oldprivatelen;
646
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700647#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 if (copy_from_user(&user, argp, sizeof(user)))
658 return -EFAULT;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700659
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
661 return -ENOMEM;
662 if (user.object_name_len) {
Li Zefana9482eb2009-04-08 15:08:53 +0800663 newname = memdup_user(user.object_name,
664 user.object_name_len);
665 if (IS_ERR(newname))
666 return PTR_ERR(newname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 } else {
668 newname = NULL;
669 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200670 down_write(&server->auth_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 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;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200680 up_write(&server->auth_rwsem);
Pekka Enberg44db77f2006-01-14 13:21:12 -0800681 kfree(oldprivate);
682 kfree(oldname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 return 0;
684 }
David Howells48937022008-11-14 10:38:58 +1100685
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700686#ifdef CONFIG_COMPAT
687 case NCP_IOC_GETPRIVATEDATA_32:
688#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 case NCP_IOC_GETPRIVATEDATA:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 {
691 struct ncp_privatedata_ioctl user;
692 size_t outl;
693
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700694#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 if (copy_from_user(&user, argp, sizeof(user)))
704 return -EFAULT;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700705
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200706 down_read(&server->auth_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 outl = user.len;
708 user.len = server->priv.len;
709 if (outl > user.len) outl = user.len;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200710 result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 if (outl) {
712 if (copy_to_user(user.data,
713 server->priv.data,
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200714 outl))
715 result = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200717 up_read(&server->auth_rwsem);
718 if (result)
719 return result;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700720#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;
Al Viro5c09d962006-10-09 20:24:49 +0100725 if (copy_to_user(argp, &user32, sizeof(user32)))
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700726 return -EFAULT;
727 } else
728#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 if (copy_to_user(argp, &user, sizeof(user)))
730 return -EFAULT;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700731
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 return 0;
733 }
David Howells48937022008-11-14 10:38:58 +1100734
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700735#ifdef CONFIG_COMPAT
736 case NCP_IOC_SETPRIVATEDATA_32:
737#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 case NCP_IOC_SETPRIVATEDATA:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 {
740 struct ncp_privatedata_ioctl user;
741 void* new;
742 void* old;
743 size_t oldlen;
744
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700745#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if (copy_from_user(&user, argp, sizeof(user)))
755 return -EFAULT;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700756
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
758 return -ENOMEM;
759 if (user.len) {
Li Zefana9482eb2009-04-08 15:08:53 +0800760 new = memdup_user(user.data, user.len);
761 if (IS_ERR(new))
762 return PTR_ERR(new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 } else {
764 new = NULL;
765 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200766 down_write(&server->auth_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 old = server->priv.data;
768 oldlen = server->priv.len;
769 server->priv.len = user.len;
770 server->priv.data = new;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200771 up_write(&server->auth_rwsem);
Pekka Enberg44db77f2006-01-14 13:21:12 -0800772 kfree(old);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 return 0;
774 }
775
776#ifdef CONFIG_NCPFS_NLS
777 case NCP_IOC_SETCHARSETS:
778 return ncp_set_charsets(server, argp);
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200779
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 case NCP_IOC_GETCHARSETS:
781 return ncp_get_charsets(server, argp);
782
783#endif /* CONFIG_NCPFS_NLS */
784
785 case NCP_IOC_SETDENTRYTTL:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 {
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;
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200795 atomic_set(&server->dentry_ttl, user);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 return 0;
797 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 case NCP_IOC_GETDENTRYTTL:
800 {
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200801 u_int32_t user = (atomic_read(&server->dentry_ttl) * 1000) / HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 if (copy_to_user(argp, &user, sizeof(user)))
803 return -EFAULT;
804 return 0;
805 }
806
807 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 return -EINVAL;
809}
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700810
John Kacur93d84b62010-05-05 15:15:37 +0200811long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
Dave Hansena761a1c2008-02-15 14:37:39 -0800812{
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200813 struct inode *inode = filp->f_dentry->d_inode;
814 struct ncp_server *server = NCP_SERVER(inode);
815 uid_t uid = current_uid();
816 int need_drop_write = 0;
John Kacur93d84b62010-05-05 15:15:37 +0200817 long ret;
Dave Hansena761a1c2008-02-15 14:37:39 -0800818
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200819 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)) {
John Kacur93d84b62010-05-05 15:15:37 +0200824 ret = -EACCES;
825 goto out;
826 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200827 break;
Dave Hansena761a1c2008-02-15 14:37:39 -0800828 }
Petr Vandrovec2e54eb92010-09-27 01:47:33 +0200829 if (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)
Dave Hansena761a1c2008-02-15 14:37:39 -0800906 mnt_drop_write(filp->f_path.mnt);
John Kacur93d84b62010-05-05 15:15:37 +0200907out:
Dave Hansena761a1c2008-02-15 14:37:39 -0800908 return ret;
909}
910
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700911#ifdef CONFIG_COMPAT
912long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
913{
John Kacur93d84b62010-05-05 15:15:37 +0200914 long ret;
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700915
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700916 arg = (unsigned long) compat_ptr(arg);
John Kacur93d84b62010-05-05 15:15:37 +0200917 ret = ncp_ioctl(file, cmd, arg);
Petr Vandrovec54f67f62006-09-30 23:27:55 -0700918 return ret;
919}
920#endif