1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 1995, 1996 by Volker Lendecke
6 * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
7 * Modified 1998, 1999 Wolfram Pienkoss for NLS
11 #include <linux/capability.h>
12 #include <linux/compat.h>
13 #include <linux/errno.h>
15 #include <linux/ioctl.h>
16 #include <linux/time.h>
18 #include <linux/mount.h>
19 #include <linux/slab.h>
20 #include <linux/highuid.h>
21 #include <linux/vmalloc.h>
22 #include <linux/sched.h>
23 #include <linux/cred.h>
25 #include <linux/uaccess.h>
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
37 ncp_get_fs_info(struct ncp_server * server, struct inode *inode,
38 struct ncp_fs_info __user *arg)
40 struct ncp_fs_info info;
42 if (copy_from_user(&info, arg, sizeof(info)))
45 if (info.version != NCP_GET_FS_INFO_VERSION) {
46 ncp_dbg(1, "info.version invalid: %d\n", info.version);
49 /* TODO: info.addr = server->m.serv_addr; */
50 SET_UID(info.mounted_uid, from_kuid_munged(current_user_ns(), 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;
56 if (copy_to_user(arg, &info, sizeof(info)))
62 ncp_get_fs_info_v2(struct ncp_server * server, struct inode *inode,
63 struct ncp_fs_info_v2 __user * arg)
65 struct ncp_fs_info_v2 info2;
67 if (copy_from_user(&info2, arg, sizeof(info2)))
70 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
71 ncp_dbg(1, "info.version invalid: %d\n", info2.version);
74 info2.mounted_uid = from_kuid_munged(current_user_ns(), 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;
81 if (copy_to_user(arg, &info2, sizeof(info2)))
87 struct compat_ncp_objectname_ioctl
91 compat_caddr_t object_name; /* a userspace data, in most cases user name */
94 struct compat_ncp_fs_info_v2 {
108 struct compat_ncp_ioctl_request {
114 struct compat_ncp_privatedata_ioctl
117 compat_caddr_t data; /* ~1000 for NDS */
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)
128 ncp_get_compat_fs_info_v2(struct ncp_server * server, struct inode *inode,
129 struct compat_ncp_fs_info_v2 __user * arg)
131 struct compat_ncp_fs_info_v2 info2;
133 if (copy_from_user(&info2, arg, sizeof(info2)))
136 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
137 ncp_dbg(1, "info.version invalid: %d\n", info2.version);
140 info2.mounted_uid = from_kuid_munged(current_user_ns(), 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;
147 if (copy_to_user(arg, &info2, sizeof(info2)))
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)
157 #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.
162 ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
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;
172 if (copy_from_user(&user, arg, sizeof(user)))
176 user.codepage[NCP_IOCSNAME_LEN] = 0;
177 if (!user.codepage[0] || !strcmp(user.codepage, "default"))
178 codepage = load_nls_default();
180 codepage = load_nls(user.codepage);
187 user.iocharset[NCP_IOCSNAME_LEN] = 0;
188 if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
189 iocharset = load_nls_default();
191 } else if (!strcmp(user.iocharset, "utf8")) {
192 iocharset = load_nls_default();
195 iocharset = load_nls(user.iocharset);
197 unload_nls(codepage);
203 mutex_lock(&server->root_setup_lock);
204 if (server->root_setuped) {
205 oldset_cp = codepage;
206 oldset_io = iocharset;
210 NCP_SET_FLAG(server, NCP_FLAG_UTF8);
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;
219 mutex_unlock(&server->root_setup_lock);
220 unload_nls(oldset_cp);
221 unload_nls(oldset_io);
227 ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
229 struct ncp_nls_ioctl user;
232 memset(&user, 0, sizeof(user));
233 mutex_lock(&server->root_setup_lock);
234 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;
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;
251 mutex_unlock(&server->root_setup_lock);
253 if (copy_to_user(arg, &user, sizeof(user)))
257 #endif /* CONFIG_NCPFS_NLS */
259 static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg)
261 struct ncp_server *server = NCP_SERVER(inode);
263 struct ncp_ioctl_request request;
265 void __user *argp = (void __user *)arg;
269 case NCP_IOC_NCPREQUEST_32:
271 case NCP_IOC_NCPREQUEST:
273 if (cmd == NCP_IOC_NCPREQUEST_32) {
274 struct compat_ncp_ioctl_request request32;
275 if (copy_from_user(&request32, argp, sizeof(request32)))
277 request.function = request32.function;
278 request.size = request32.size;
279 request.data = compat_ptr(request32.data);
282 if (copy_from_user(&request, argp, sizeof(request)))
285 if ((request.function > 255)
287 NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
290 bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
293 if (copy_from_user(bouncebuffer, request.data, request.size)) {
297 ncp_lock_server(server);
299 /* FIXME: We hack around in the server's structures
300 here to be able to use ncp_request */
302 server->has_subfunction = 0;
303 server->current_size = request.size;
304 memcpy(server->packet, bouncebuffer, request.size);
306 result = ncp_request2(server, request.function,
307 bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
311 result = server->reply_size;
312 ncp_unlock_server(server);
313 ncp_dbg(1, "copy %d bytes\n", result);
315 if (copy_to_user(request.data, bouncebuffer, result))
320 case NCP_IOC_CONN_LOGGED_IN:
322 if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
324 mutex_lock(&server->root_setup_lock);
325 if (server->root_setuped)
328 result = ncp_conn_logged_in(inode->i_sb);
330 server->root_setuped = 1;
332 mutex_unlock(&server->root_setup_lock);
335 case NCP_IOC_GET_FS_INFO:
336 return ncp_get_fs_info(server, inode, argp);
338 case NCP_IOC_GET_FS_INFO_V2:
339 return ncp_get_fs_info_v2(server, inode, argp);
342 case NCP_IOC_GET_FS_INFO_V2_32:
343 return ncp_get_compat_fs_info_v2(server, inode, argp);
345 /* we have too many combinations of CONFIG_COMPAT,
346 * CONFIG_64BIT and CONFIG_UID16, so just handle
347 * any of the possible ioctls */
348 case NCP_IOC_GETMOUNTUID16:
352 SET_UID(uid, from_kuid_munged(current_user_ns(), server->m.mounted_uid));
353 if (put_user(uid, (u16 __user *)argp))
357 case NCP_IOC_GETMOUNTUID32:
359 uid_t uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
360 if (put_user(uid, (u32 __user *)argp))
364 case NCP_IOC_GETMOUNTUID64:
366 uid_t uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
367 if (put_user(uid, (u64 __user *)argp))
371 case NCP_IOC_GETROOT:
373 struct ncp_setroot_ioctl sr;
376 mutex_lock(&server->root_setup_lock);
377 if (server->m.mounted_vol[0]) {
378 struct dentry* dentry = inode->i_sb->s_root;
381 struct inode* s_inode = d_inode(dentry);
384 sr.volNumber = NCP_FINFO(s_inode)->volNumber;
385 sr.dirEntNum = NCP_FINFO(s_inode)->dirEntNum;
386 sr.namespace = server->name_space[sr.volNumber];
389 ncp_dbg(1, "d_inode(s_root)==NULL\n");
391 ncp_dbg(1, "s_root==NULL\n");
398 mutex_unlock(&server->root_setup_lock);
399 if (!result && copy_to_user(argp, &sr, sizeof(sr)))
404 case NCP_IOC_SETROOT:
406 struct ncp_setroot_ioctl sr;
410 struct dentry* dentry;
412 if (copy_from_user(&sr, argp, sizeof(sr)))
414 mutex_lock(&server->root_setup_lock);
415 if (server->root_setuped)
418 if (sr.volNumber < 0) {
419 server->m.mounted_vol[0] = 0;
420 vnum = NCP_NUMBER_OF_VOLUMES;
424 } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
426 } else if (ncp_mount_subdir(server, sr.volNumber,
427 sr.namespace, sr.dirEntNum,
428 &vnum, &de, &dosde)) {
434 dentry = inode->i_sb->s_root;
436 struct inode* s_inode = d_inode(dentry);
439 NCP_FINFO(s_inode)->volNumber = vnum;
440 NCP_FINFO(s_inode)->dirEntNum = de;
441 NCP_FINFO(s_inode)->DosDirNum = dosde;
442 server->root_setuped = 1;
444 ncp_dbg(1, "d_inode(s_root)==NULL\n");
448 ncp_dbg(1, "s_root==NULL\n");
453 mutex_unlock(&server->root_setup_lock);
458 #ifdef CONFIG_NCPFS_PACKET_SIGNING
459 case NCP_IOC_SIGN_INIT:
461 struct ncp_sign_init sign;
464 if (copy_from_user(&sign, argp, sizeof(sign)))
466 ncp_lock_server(server);
467 mutex_lock(&server->rcv.creq_mutex);
469 if (server->sign_wanted) {
470 memcpy(server->sign_root,sign.sign_root,8);
471 memcpy(server->sign_last,sign.sign_last,16);
472 server->sign_active = 1;
474 /* ignore when signatures not wanted */
476 server->sign_active = 0;
478 mutex_unlock(&server->rcv.creq_mutex);
479 ncp_unlock_server(server);
483 case NCP_IOC_SIGN_WANTED:
487 ncp_lock_server(server);
488 state = server->sign_wanted;
489 ncp_unlock_server(server);
490 if (put_user(state, (int __user *)argp))
495 case NCP_IOC_SET_SIGN_WANTED:
499 /* get only low 8 bits... */
500 if (get_user(newstate, (unsigned char __user *)argp))
503 ncp_lock_server(server);
504 if (server->sign_active) {
505 /* cannot turn signatures OFF when active */
509 server->sign_wanted = newstate != 0;
511 ncp_unlock_server(server);
515 #endif /* CONFIG_NCPFS_PACKET_SIGNING */
517 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
518 case NCP_IOC_LOCKUNLOCK:
520 struct ncp_lock_ioctl rqdata;
522 if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
524 if (rqdata.origin != 0)
527 switch (rqdata.cmd) {
530 if (rqdata.timeout < 0)
532 if (rqdata.timeout == 0)
533 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
534 else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
535 rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
538 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */
544 /* locking needs both read and write access */
545 if ((result = ncp_make_open(inode, O_RDWR)) != 0)
550 if (!S_ISREG(inode->i_mode))
552 if (rqdata.cmd == NCP_LOCK_CLEAR)
554 result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
555 NCP_FINFO(inode)->file_handle,
558 if (result > 0) result = 0; /* no such lock */
566 case NCP_LOCK_EX: lockcmd=1; break;
567 case NCP_LOCK_SH: lockcmd=3; break;
568 default: lockcmd=0; break;
570 result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
571 NCP_FINFO(inode)->file_handle,
576 if (result > 0) result = -EAGAIN;
579 ncp_inode_close(inode);
582 #endif /* CONFIG_NCPFS_IOCTL_LOCKING */
585 case NCP_IOC_GETOBJECTNAME_32:
587 struct compat_ncp_objectname_ioctl user;
590 if (copy_from_user(&user, argp, sizeof(user)))
592 down_read(&server->auth_rwsem);
593 user.auth_type = server->auth.auth_type;
594 outl = user.object_name_len;
595 user.object_name_len = server->auth.object_name_len;
596 if (outl > user.object_name_len)
597 outl = user.object_name_len;
600 if (copy_to_user(compat_ptr(user.object_name),
601 server->auth.object_name,
605 up_read(&server->auth_rwsem);
606 if (!result && copy_to_user(argp, &user, sizeof(user)))
612 case NCP_IOC_GETOBJECTNAME:
614 struct ncp_objectname_ioctl user;
617 if (copy_from_user(&user, argp, sizeof(user)))
619 down_read(&server->auth_rwsem);
620 user.auth_type = server->auth.auth_type;
621 outl = user.object_name_len;
622 user.object_name_len = server->auth.object_name_len;
623 if (outl > user.object_name_len)
624 outl = user.object_name_len;
627 if (copy_to_user(user.object_name,
628 server->auth.object_name,
632 up_read(&server->auth_rwsem);
633 if (!result && copy_to_user(argp, &user, sizeof(user)))
639 case NCP_IOC_SETOBJECTNAME_32:
641 case NCP_IOC_SETOBJECTNAME:
643 struct ncp_objectname_ioctl user;
648 size_t oldprivatelen;
651 if (cmd == NCP_IOC_SETOBJECTNAME_32) {
652 struct compat_ncp_objectname_ioctl user32;
653 if (copy_from_user(&user32, argp, sizeof(user32)))
655 user.auth_type = user32.auth_type;
656 user.object_name_len = user32.object_name_len;
657 user.object_name = compat_ptr(user32.object_name);
660 if (copy_from_user(&user, argp, sizeof(user)))
663 if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
665 if (user.object_name_len) {
666 newname = memdup_user(user.object_name,
667 user.object_name_len);
669 return PTR_ERR(newname);
673 down_write(&server->auth_rwsem);
674 oldname = server->auth.object_name;
675 oldnamelen = server->auth.object_name_len;
676 oldprivate = server->priv.data;
677 oldprivatelen = server->priv.len;
678 server->auth.auth_type = user.auth_type;
679 server->auth.object_name_len = user.object_name_len;
680 server->auth.object_name = newname;
681 server->priv.len = 0;
682 server->priv.data = NULL;
683 up_write(&server->auth_rwsem);
690 case NCP_IOC_GETPRIVATEDATA_32:
692 case NCP_IOC_GETPRIVATEDATA:
694 struct ncp_privatedata_ioctl user;
698 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
699 struct compat_ncp_privatedata_ioctl user32;
700 if (copy_from_user(&user32, argp, sizeof(user32)))
702 user.len = user32.len;
703 user.data = compat_ptr(user32.data);
706 if (copy_from_user(&user, argp, sizeof(user)))
709 down_read(&server->auth_rwsem);
711 user.len = server->priv.len;
712 if (outl > user.len) outl = user.len;
715 if (copy_to_user(user.data,
720 up_read(&server->auth_rwsem);
724 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
725 struct compat_ncp_privatedata_ioctl user32;
726 user32.len = user.len;
727 user32.data = (unsigned long) user.data;
728 if (copy_to_user(argp, &user32, sizeof(user32)))
732 if (copy_to_user(argp, &user, sizeof(user)))
739 case NCP_IOC_SETPRIVATEDATA_32:
741 case NCP_IOC_SETPRIVATEDATA:
743 struct ncp_privatedata_ioctl user;
749 if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
750 struct compat_ncp_privatedata_ioctl user32;
751 if (copy_from_user(&user32, argp, sizeof(user32)))
753 user.len = user32.len;
754 user.data = compat_ptr(user32.data);
757 if (copy_from_user(&user, argp, sizeof(user)))
760 if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
763 new = memdup_user(user.data, user.len);
769 down_write(&server->auth_rwsem);
770 old = server->priv.data;
771 oldlen = server->priv.len;
772 server->priv.len = user.len;
773 server->priv.data = new;
774 up_write(&server->auth_rwsem);
779 #ifdef CONFIG_NCPFS_NLS
780 case NCP_IOC_SETCHARSETS:
781 return ncp_set_charsets(server, argp);
783 case NCP_IOC_GETCHARSETS:
784 return ncp_get_charsets(server, argp);
786 #endif /* CONFIG_NCPFS_NLS */
788 case NCP_IOC_SETDENTRYTTL:
792 if (copy_from_user(&user, argp, sizeof(user)))
794 /* 20 secs at most... */
797 user = (user * HZ) / 1000;
798 atomic_set(&server->dentry_ttl, user);
802 case NCP_IOC_GETDENTRYTTL:
804 u_int32_t user = (atomic_read(&server->dentry_ttl) * 1000) / HZ;
805 if (copy_to_user(argp, &user, sizeof(user)))
814 long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
816 struct inode *inode = file_inode(filp);
817 struct ncp_server *server = NCP_SERVER(inode);
818 kuid_t uid = current_uid();
819 int need_drop_write = 0;
823 case NCP_IOC_SETCHARSETS:
824 case NCP_IOC_CONN_LOGGED_IN:
825 case NCP_IOC_SETROOT:
826 if (!capable(CAP_SYS_ADMIN)) {
832 if (!uid_eq(server->m.mounted_uid, uid)) {
835 * Only mount owner can issue these ioctls. Information
836 * necessary to authenticate to other NDS servers are
839 case NCP_IOC_GETOBJECTNAME:
840 case NCP_IOC_SETOBJECTNAME:
841 case NCP_IOC_GETPRIVATEDATA:
842 case NCP_IOC_SETPRIVATEDATA:
844 case NCP_IOC_GETOBJECTNAME_32:
845 case NCP_IOC_SETOBJECTNAME_32:
846 case NCP_IOC_GETPRIVATEDATA_32:
847 case NCP_IOC_SETPRIVATEDATA_32:
852 * These require write access on the inode if user id
853 * does not match. Note that they do not write to the
854 * file... But old code did mnt_want_write, so I keep
855 * it as is. Of course not for mountpoint owner, as
856 * that breaks read-only mounts altogether as ncpmount
857 * needs working NCP_IOC_NCPREQUEST and
858 * NCP_IOC_GET_FS_INFO. Some of these codes (setdentryttl,
859 * signinit, setsignwanted) should be probably restricted
860 * to owner only, or even more to CAP_SYS_ADMIN).
862 case NCP_IOC_GET_FS_INFO:
863 case NCP_IOC_GET_FS_INFO_V2:
864 case NCP_IOC_NCPREQUEST:
865 case NCP_IOC_SETDENTRYTTL:
866 case NCP_IOC_SIGN_INIT:
867 case NCP_IOC_LOCKUNLOCK:
868 case NCP_IOC_SET_SIGN_WANTED:
870 case NCP_IOC_GET_FS_INFO_V2_32:
871 case NCP_IOC_NCPREQUEST_32:
873 ret = mnt_want_write_file(filp);
877 ret = inode_permission(inode, MAY_WRITE);
882 * Read access required.
884 case NCP_IOC_GETMOUNTUID16:
885 case NCP_IOC_GETMOUNTUID32:
886 case NCP_IOC_GETMOUNTUID64:
887 case NCP_IOC_GETROOT:
888 case NCP_IOC_SIGN_WANTED:
889 ret = inode_permission(inode, MAY_READ);
894 * Anybody can read these.
896 case NCP_IOC_GETCHARSETS:
897 case NCP_IOC_GETDENTRYTTL:
899 /* Three codes below are protected by CAP_SYS_ADMIN above. */
900 case NCP_IOC_SETCHARSETS:
901 case NCP_IOC_CONN_LOGGED_IN:
902 case NCP_IOC_SETROOT:
906 ret = __ncp_ioctl(inode, cmd, arg);
909 mnt_drop_write_file(filp);
915 long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
919 arg = (unsigned long) compat_ptr(arg);
920 ret = ncp_ioctl(file, cmd, arg);