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
10 #include <linux/capability.h>
11 #include <linux/compat.h>
12 #include <linux/errno.h>
14 #include <linux/ioctl.h>
15 #include <linux/time.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>
23 #include <linux/ncp_fs.h>
25 #include <asm/uaccess.h>
27 #include "ncplib_kernel.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 file *file,
38 struct ncp_fs_info __user *arg)
40 struct inode *inode = file->f_path.dentry->d_inode;
41 struct ncp_fs_info info;
43 if (file_permission(file, MAY_WRITE) != 0
44 && current_uid() != server->m.mounted_uid)
47 if (copy_from_user(&info, arg, sizeof(info)))
50 if (info.version != NCP_GET_FS_INFO_VERSION) {
51 DPRINTK("info.version invalid: %d\n", info.version);
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;
61 if (copy_to_user(arg, &info, sizeof(info)))
67 ncp_get_fs_info_v2(struct ncp_server * server, struct file *file,
68 struct ncp_fs_info_v2 __user * arg)
70 struct inode *inode = file->f_path.dentry->d_inode;
71 struct ncp_fs_info_v2 info2;
73 if (file_permission(file, MAY_WRITE) != 0
74 && current_uid() != server->m.mounted_uid)
77 if (copy_from_user(&info2, arg, sizeof(info2)))
80 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
81 DPRINTK("info.version invalid: %d\n", info2.version);
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;
91 if (copy_to_user(arg, &info2, sizeof(info2)))
97 struct compat_ncp_objectname_ioctl
101 compat_caddr_t object_name; /* a userspace data, in most cases user name */
104 struct compat_ncp_fs_info_v2 {
118 struct compat_ncp_ioctl_request {
124 struct compat_ncp_privatedata_ioctl
127 compat_caddr_t data; /* ~1000 for NDS */
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)
138 ncp_get_compat_fs_info_v2(struct ncp_server * server, struct file *file,
139 struct compat_ncp_fs_info_v2 __user * arg)
141 struct inode *inode = file->f_path.dentry->d_inode;
142 struct compat_ncp_fs_info_v2 info2;
144 if (file_permission(file, MAY_WRITE) != 0
145 && current_uid() != server->m.mounted_uid)
148 if (copy_from_user(&info2, arg, sizeof(info2)))
151 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
152 DPRINTK("info.version invalid: %d\n", info2.version);
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;
162 if (copy_to_user(arg, &info2, sizeof(info2)))
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)
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.
177 ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
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;
185 if (!capable(CAP_SYS_ADMIN))
187 if (server->root_setuped)
190 if (copy_from_user(&user, arg, sizeof(user)))
194 user.codepage[NCP_IOCSNAME_LEN] = 0;
195 if (!user.codepage[0] || !strcmp(user.codepage, "default"))
196 codepage = load_nls_default();
198 codepage = load_nls(user.codepage);
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);
213 iocharset = load_nls(user.iocharset);
215 unload_nls(codepage);
218 NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
221 oldset_cp = server->nls_vol;
222 server->nls_vol = codepage;
223 oldset_io = server->nls_io;
224 server->nls_io = iocharset;
226 unload_nls(oldset_cp);
227 unload_nls(oldset_io);
233 ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
235 struct ncp_nls_ioctl user;
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;
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;
257 if (copy_to_user(arg, &user, sizeof(user)))
261 #endif /* CONFIG_NCPFS_NLS */
263 static int __ncp_ioctl(struct inode *inode, struct file *filp,
264 unsigned int cmd, unsigned long arg)
266 struct ncp_server *server = NCP_SERVER(inode);
268 struct ncp_ioctl_request request;
270 void __user *argp = (void __user *)arg;
271 uid_t uid = current_uid();
275 case NCP_IOC_NCPREQUEST_32:
277 case NCP_IOC_NCPREQUEST:
278 if (file_permission(filp, MAY_WRITE) != 0
279 && uid != server->m.mounted_uid)
283 if (cmd == NCP_IOC_NCPREQUEST_32) {
284 struct compat_ncp_ioctl_request request32;
285 if (copy_from_user(&request32, argp, sizeof(request32)))
287 request.function = request32.function;
288 request.size = request32.size;
289 request.data = compat_ptr(request32.data);
292 if (copy_from_user(&request, argp, sizeof(request)))
295 if ((request.function > 255)
297 NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
300 bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
303 if (copy_from_user(bouncebuffer, request.data, request.size)) {
307 ncp_lock_server(server);
309 /* FIXME: We hack around in the server's structures
310 here to be able to use ncp_request */
312 server->has_subfunction = 0;
313 server->current_size = request.size;
314 memcpy(server->packet, bouncebuffer, request.size);
316 result = ncp_request2(server, request.function,
317 bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
321 result = server->reply_size;
322 ncp_unlock_server(server);
323 DPRINTK("ncp_ioctl: copy %d bytes\n",
326 if (copy_to_user(request.data, bouncebuffer, result))
331 case NCP_IOC_CONN_LOGGED_IN:
333 if (!capable(CAP_SYS_ADMIN))
335 if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
337 if (server->root_setuped)
339 server->root_setuped = 1;
340 return ncp_conn_logged_in(inode->i_sb);
342 case NCP_IOC_GET_FS_INFO:
343 return ncp_get_fs_info(server, filp, argp);
345 case NCP_IOC_GET_FS_INFO_V2:
346 return ncp_get_fs_info_v2(server, filp, argp);
349 case NCP_IOC_GET_FS_INFO_V2_32:
350 return ncp_get_compat_fs_info_v2(server, filp, argp);
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)
362 if (cmd == NCP_IOC_GETMOUNTUID16) {
364 SET_UID(uid, server->m.mounted_uid);
365 if (put_user(uid, (u16 __user *)argp))
367 } else if (cmd == NCP_IOC_GETMOUNTUID32) {
368 if (put_user(server->m.mounted_uid,
372 if (put_user(server->m.mounted_uid,
378 case NCP_IOC_GETROOT:
380 struct ncp_setroot_ioctl sr;
382 if (file_permission(filp, MAY_READ) != 0
383 && uid != server->m.mounted_uid)
386 if (server->m.mounted_vol[0]) {
387 struct dentry* dentry = inode->i_sb->s_root;
390 struct inode* s_inode = dentry->d_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];
397 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
399 DPRINTK("ncpfs: s_root==NULL\n");
405 if (copy_to_user(argp, &sr, sizeof(sr)))
410 case NCP_IOC_SETROOT:
412 struct ncp_setroot_ioctl sr;
416 struct dentry* dentry;
418 if (!capable(CAP_SYS_ADMIN))
422 if (server->root_setuped) return -EBUSY;
423 if (copy_from_user(&sr, argp, sizeof(sr)))
425 if (sr.volNumber < 0) {
426 server->m.mounted_vol[0] = 0;
427 vnum = NCP_NUMBER_OF_VOLUMES;
430 } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
432 } else if (ncp_mount_subdir(server, sr.volNumber,
433 sr.namespace, sr.dirEntNum,
434 &vnum, &de, &dosde)) {
438 dentry = inode->i_sb->s_root;
439 server->root_setuped = 1;
441 struct inode* s_inode = dentry->d_inode;
444 NCP_FINFO(s_inode)->volNumber = vnum;
445 NCP_FINFO(s_inode)->dirEntNum = de;
446 NCP_FINFO(s_inode)->DosDirNum = dosde;
448 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
450 DPRINTK("ncpfs: s_root==NULL\n");
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)
462 if (server->sign_wanted)
464 struct ncp_sign_init sign;
466 if (copy_from_user(&sign, argp, sizeof(sign)))
468 memcpy(server->sign_root,sign.sign_root,8);
469 memcpy(server->sign_last,sign.sign_last,16);
470 server->sign_active = 1;
472 /* ignore when signatures not wanted */
474 server->sign_active = 0;
478 case NCP_IOC_SIGN_WANTED:
479 if (file_permission(filp, MAY_READ) != 0
480 && uid != server->m.mounted_uid)
483 if (put_user(server->sign_wanted, (int __user *)argp))
487 case NCP_IOC_SET_SIGN_WANTED:
491 if (file_permission(filp, MAY_WRITE) != 0
492 && uid != server->m.mounted_uid)
495 /* get only low 8 bits... */
496 if (get_user(newstate, (unsigned char __user *)argp))
498 if (server->sign_active) {
499 /* cannot turn signatures OFF when active */
500 if (!newstate) return -EINVAL;
502 server->sign_wanted = newstate != 0;
507 #endif /* CONFIG_NCPFS_PACKET_SIGNING */
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)
516 struct ncp_lock_ioctl rqdata;
518 if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
520 if (rqdata.origin != 0)
523 switch (rqdata.cmd) {
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;
532 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */
538 /* locking needs both read and write access */
539 if ((result = ncp_make_open(inode, O_RDWR)) != 0)
544 if (!ncp_conn_valid(server))
547 if (!S_ISREG(inode->i_mode))
549 if (rqdata.cmd == NCP_LOCK_CLEAR)
551 result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
552 NCP_FINFO(inode)->file_handle,
555 if (result > 0) result = 0; /* no such lock */
563 case NCP_LOCK_EX: lockcmd=1; break;
564 case NCP_LOCK_SH: lockcmd=3; break;
565 default: lockcmd=0; break;
567 result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
568 NCP_FINFO(inode)->file_handle,
573 if (result > 0) result = -EAGAIN;
576 ncp_inode_close(inode);
579 #endif /* CONFIG_NCPFS_IOCTL_LOCKING */
582 case NCP_IOC_GETOBJECTNAME_32:
583 if (uid != server->m.mounted_uid)
586 struct compat_ncp_objectname_ioctl user;
589 if (copy_from_user(&user, argp, sizeof(user)))
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;
597 if (copy_to_user(compat_ptr(user.object_name),
598 server->auth.object_name,
599 outl)) return -EFAULT;
601 if (copy_to_user(argp, &user, sizeof(user)))
607 case NCP_IOC_GETOBJECTNAME:
608 if (uid != server->m.mounted_uid)
611 struct ncp_objectname_ioctl user;
614 if (copy_from_user(&user, argp, sizeof(user)))
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;
622 if (copy_to_user(user.object_name,
623 server->auth.object_name,
624 outl)) return -EFAULT;
626 if (copy_to_user(argp, &user, sizeof(user)))
632 case NCP_IOC_SETOBJECTNAME_32:
634 case NCP_IOC_SETOBJECTNAME:
635 if (uid != server->m.mounted_uid)
638 struct ncp_objectname_ioctl user;
643 size_t oldprivatelen;
646 if (cmd == NCP_IOC_SETOBJECTNAME_32) {
647 struct compat_ncp_objectname_ioctl user32;
648 if (copy_from_user(&user32, argp, sizeof(user32)))
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);
655 if (copy_from_user(&user, argp, sizeof(user)))
658 if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
660 if (user.object_name_len) {
661 newname = memdup_user(user.object_name,
662 user.object_name_len);
664 return PTR_ERR(newname);
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 */
687 case NCP_IOC_GETPRIVATEDATA_32:
689 case NCP_IOC_GETPRIVATEDATA:
690 if (uid != server->m.mounted_uid)
693 struct ncp_privatedata_ioctl user;
697 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
698 struct compat_ncp_privatedata_ioctl user32;
699 if (copy_from_user(&user32, argp, sizeof(user32)))
701 user.len = user32.len;
702 user.data = compat_ptr(user32.data);
705 if (copy_from_user(&user, argp, sizeof(user)))
709 user.len = server->priv.len;
710 if (outl > user.len) outl = user.len;
712 if (copy_to_user(user.data,
714 outl)) return -EFAULT;
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)))
725 if (copy_to_user(argp, &user, sizeof(user)))
732 case NCP_IOC_SETPRIVATEDATA_32:
734 case NCP_IOC_SETPRIVATEDATA:
735 if (uid != server->m.mounted_uid)
738 struct ncp_privatedata_ioctl user;
744 if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
745 struct compat_ncp_privatedata_ioctl user32;
746 if (copy_from_user(&user32, argp, sizeof(user32)))
748 user.len = user32.len;
749 user.data = compat_ptr(user32.data);
752 if (copy_from_user(&user, argp, sizeof(user)))
755 if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
758 new = memdup_user(user.data, user.len);
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 */
774 #ifdef CONFIG_NCPFS_NLS
775 case NCP_IOC_SETCHARSETS:
776 return ncp_set_charsets(server, argp);
778 case NCP_IOC_GETCHARSETS:
779 return ncp_get_charsets(server, argp);
781 #endif /* CONFIG_NCPFS_NLS */
783 case NCP_IOC_SETDENTRYTTL:
784 if (file_permission(filp, MAY_WRITE) != 0 &&
785 uid != server->m.mounted_uid)
791 if (copy_from_user(&user, argp, sizeof(user)))
793 /* 20 secs at most... */
796 user = (user * HZ) / 1000;
797 server->dentry_ttl = user;
801 case NCP_IOC_GETDENTRYTTL:
803 u_int32_t user = (server->dentry_ttl * 1000) / HZ;
804 if (copy_to_user(argp, &user, sizeof(user)))
813 static int ncp_ioctl_need_write(unsigned int 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:
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:
838 /* unkown IOCTL command, assume write */
843 int ncp_ioctl(struct inode *inode, struct file *filp,
844 unsigned int cmd, unsigned long arg)
848 if (ncp_ioctl_need_write(cmd)) {
850 * inside the ioctl(), any failures which
851 * are because of file_permission() are
852 * -EACCESS, so it seems consistent to keep
855 if (mnt_want_write(filp->f_path.mnt))
858 ret = __ncp_ioctl(inode, filp, cmd, arg);
859 if (ncp_ioctl_need_write(cmd))
860 mnt_drop_write(filp->f_path.mnt);
865 long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
867 struct inode *inode = file->f_path.dentry->d_inode;
871 arg = (unsigned long) compat_ptr(arg);
872 ret = ncp_ioctl(inode, file, cmd, arg);