1 /*
2 * inode.c
3 *
4 * Copyright (C) 1995, 1996 by Volker Lendecke
5 * Modified for big endian by J.F. Chadima and David S. Miller
6 * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
7 * Modified 1998 Wolfram Pienkoss for NLS
8 * Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info
9 *
10 */
11
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14 #include <linux/module.h>
15
16 #include <asm/uaccess.h>
17 #include <asm/byteorder.h>
18
19 #include <linux/time.h>
20 #include <linux/kernel.h>
21 #include <linux/mm.h>
22 #include <linux/string.h>
23 #include <linux/stat.h>
24 #include <linux/errno.h>
25 #include <linux/file.h>
26 #include <linux/fcntl.h>
27 #include <linux/slab.h>
28 #include <linux/vmalloc.h>
29 #include <linux/init.h>
30 #include <linux/vfs.h>
31 #include <linux/mount.h>
32 #include <linux/seq_file.h>
33 #include <linux/namei.h>
34
35 #include <net/sock.h>
36
37 #include "ncp_fs.h"
38 #include "getopt.h"
39
40 #define NCP_DEFAULT_FILE_MODE 0600
41 #define NCP_DEFAULT_DIR_MODE 0700
42 #define NCP_DEFAULT_TIME_OUT 10
43 #define NCP_DEFAULT_RETRY_COUNT 20
44
45 static void ncp_evict_inode(struct inode *);
46 static void ncp_put_super(struct super_block *);
47 static int ncp_statfs(struct dentry *, struct kstatfs *);
48 static int ncp_show_options(struct seq_file *, struct dentry *);
49
50 static struct kmem_cache * ncp_inode_cachep;
51
ncp_alloc_inode(struct super_block * sb)52 static struct inode *ncp_alloc_inode(struct super_block *sb)
53 {
54 struct ncp_inode_info *ei;
55 ei = (struct ncp_inode_info *)kmem_cache_alloc(ncp_inode_cachep, GFP_KERNEL);
56 if (!ei)
57 return NULL;
58 return &ei->vfs_inode;
59 }
60
ncp_i_callback(struct rcu_head * head)61 static void ncp_i_callback(struct rcu_head *head)
62 {
63 struct inode *inode = container_of(head, struct inode, i_rcu);
64 kmem_cache_free(ncp_inode_cachep, NCP_FINFO(inode));
65 }
66
ncp_destroy_inode(struct inode * inode)67 static void ncp_destroy_inode(struct inode *inode)
68 {
69 call_rcu(&inode->i_rcu, ncp_i_callback);
70 }
71
init_once(void * foo)72 static void init_once(void *foo)
73 {
74 struct ncp_inode_info *ei = (struct ncp_inode_info *) foo;
75
76 mutex_init(&ei->open_mutex);
77 inode_init_once(&ei->vfs_inode);
78 }
79
init_inodecache(void)80 static int init_inodecache(void)
81 {
82 ncp_inode_cachep = kmem_cache_create("ncp_inode_cache",
83 sizeof(struct ncp_inode_info),
84 0, (SLAB_RECLAIM_ACCOUNT|
85 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
86 init_once);
87 if (ncp_inode_cachep == NULL)
88 return -ENOMEM;
89 return 0;
90 }
91
destroy_inodecache(void)92 static void destroy_inodecache(void)
93 {
94 /*
95 * Make sure all delayed rcu free inodes are flushed before we
96 * destroy cache.
97 */
98 rcu_barrier();
99 kmem_cache_destroy(ncp_inode_cachep);
100 }
101
ncp_remount(struct super_block * sb,int * flags,char * data)102 static int ncp_remount(struct super_block *sb, int *flags, char* data)
103 {
104 sync_filesystem(sb);
105 *flags |= MS_NODIRATIME;
106 return 0;
107 }
108
109 static const struct super_operations ncp_sops =
110 {
111 .alloc_inode = ncp_alloc_inode,
112 .destroy_inode = ncp_destroy_inode,
113 .drop_inode = generic_delete_inode,
114 .evict_inode = ncp_evict_inode,
115 .put_super = ncp_put_super,
116 .statfs = ncp_statfs,
117 .remount_fs = ncp_remount,
118 .show_options = ncp_show_options,
119 };
120
121 /*
122 * Fill in the ncpfs-specific information in the inode.
123 */
ncp_update_dirent(struct inode * inode,struct ncp_entry_info * nwinfo)124 static void ncp_update_dirent(struct inode *inode, struct ncp_entry_info *nwinfo)
125 {
126 NCP_FINFO(inode)->DosDirNum = nwinfo->i.DosDirNum;
127 NCP_FINFO(inode)->dirEntNum = nwinfo->i.dirEntNum;
128 NCP_FINFO(inode)->volNumber = nwinfo->volume;
129 }
130
ncp_update_inode(struct inode * inode,struct ncp_entry_info * nwinfo)131 void ncp_update_inode(struct inode *inode, struct ncp_entry_info *nwinfo)
132 {
133 ncp_update_dirent(inode, nwinfo);
134 NCP_FINFO(inode)->nwattr = nwinfo->i.attributes;
135 NCP_FINFO(inode)->access = nwinfo->access;
136 memcpy(NCP_FINFO(inode)->file_handle, nwinfo->file_handle,
137 sizeof(nwinfo->file_handle));
138 ncp_dbg(1, "updated %s, volnum=%d, dirent=%u\n",
139 nwinfo->i.entryName, NCP_FINFO(inode)->volNumber,
140 NCP_FINFO(inode)->dirEntNum);
141 }
142
ncp_update_dates(struct inode * inode,struct nw_info_struct * nwi)143 static void ncp_update_dates(struct inode *inode, struct nw_info_struct *nwi)
144 {
145 /* NFS namespace mode overrides others if it's set. */
146 ncp_dbg(1, "(%s) nfs.mode=0%o\n", nwi->entryName, nwi->nfs.mode);
147 if (nwi->nfs.mode) {
148 /* XXX Security? */
149 inode->i_mode = nwi->nfs.mode;
150 }
151
152 inode->i_blocks = (i_size_read(inode) + NCP_BLOCK_SIZE - 1) >> NCP_BLOCK_SHIFT;
153
154 inode->i_mtime.tv_sec = ncp_date_dos2unix(nwi->modifyTime, nwi->modifyDate);
155 inode->i_ctime.tv_sec = ncp_date_dos2unix(nwi->creationTime, nwi->creationDate);
156 inode->i_atime.tv_sec = ncp_date_dos2unix(0, nwi->lastAccessDate);
157 inode->i_atime.tv_nsec = 0;
158 inode->i_mtime.tv_nsec = 0;
159 inode->i_ctime.tv_nsec = 0;
160 }
161
ncp_update_attrs(struct inode * inode,struct ncp_entry_info * nwinfo)162 static void ncp_update_attrs(struct inode *inode, struct ncp_entry_info *nwinfo)
163 {
164 struct nw_info_struct *nwi = &nwinfo->i;
165 struct ncp_server *server = NCP_SERVER(inode);
166
167 if (nwi->attributes & aDIR) {
168 inode->i_mode = server->m.dir_mode;
169 /* for directories dataStreamSize seems to be some
170 Object ID ??? */
171 i_size_write(inode, NCP_BLOCK_SIZE);
172 } else {
173 u32 size;
174
175 inode->i_mode = server->m.file_mode;
176 size = le32_to_cpu(nwi->dataStreamSize);
177 i_size_write(inode, size);
178 #ifdef CONFIG_NCPFS_EXTRAS
179 if ((server->m.flags & (NCP_MOUNT_EXTRAS|NCP_MOUNT_SYMLINKS))
180 && (nwi->attributes & aSHARED)) {
181 switch (nwi->attributes & (aHIDDEN|aSYSTEM)) {
182 case aHIDDEN:
183 if (server->m.flags & NCP_MOUNT_SYMLINKS) {
184 if (/* (size >= NCP_MIN_SYMLINK_SIZE)
185 && */ (size <= NCP_MAX_SYMLINK_SIZE)) {
186 inode->i_mode = (inode->i_mode & ~S_IFMT) | S_IFLNK;
187 NCP_FINFO(inode)->flags |= NCPI_KLUDGE_SYMLINK;
188 break;
189 }
190 }
191 /* FALLTHROUGH */
192 case 0:
193 if (server->m.flags & NCP_MOUNT_EXTRAS)
194 inode->i_mode |= S_IRUGO;
195 break;
196 case aSYSTEM:
197 if (server->m.flags & NCP_MOUNT_EXTRAS)
198 inode->i_mode |= (inode->i_mode >> 2) & S_IXUGO;
199 break;
200 /* case aSYSTEM|aHIDDEN: */
201 default:
202 /* reserved combination */
203 break;
204 }
205 }
206 #endif
207 }
208 if (nwi->attributes & aRONLY) inode->i_mode &= ~S_IWUGO;
209 }
210
ncp_update_inode2(struct inode * inode,struct ncp_entry_info * nwinfo)211 void ncp_update_inode2(struct inode* inode, struct ncp_entry_info *nwinfo)
212 {
213 NCP_FINFO(inode)->flags = 0;
214 if (!atomic_read(&NCP_FINFO(inode)->opened)) {
215 NCP_FINFO(inode)->nwattr = nwinfo->i.attributes;
216 ncp_update_attrs(inode, nwinfo);
217 }
218
219 ncp_update_dates(inode, &nwinfo->i);
220 ncp_update_dirent(inode, nwinfo);
221 }
222
223 /*
224 * Fill in the inode based on the ncp_entry_info structure. Used only for brand new inodes.
225 */
ncp_set_attr(struct inode * inode,struct ncp_entry_info * nwinfo)226 static void ncp_set_attr(struct inode *inode, struct ncp_entry_info *nwinfo)
227 {
228 struct ncp_server *server = NCP_SERVER(inode);
229
230 NCP_FINFO(inode)->flags = 0;
231
232 ncp_update_attrs(inode, nwinfo);
233
234 ncp_dbg(2, "inode->i_mode = %u\n", inode->i_mode);
235
236 set_nlink(inode, 1);
237 inode->i_uid = server->m.uid;
238 inode->i_gid = server->m.gid;
239
240 ncp_update_dates(inode, &nwinfo->i);
241 ncp_update_inode(inode, nwinfo);
242 }
243
244 #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
245 static const struct inode_operations ncp_symlink_inode_operations = {
246 .readlink = generic_readlink,
247 .get_link = page_get_link,
248 .setattr = ncp_notify_change,
249 };
250 #endif
251
252 /*
253 * Get a new inode.
254 */
255 struct inode *
ncp_iget(struct super_block * sb,struct ncp_entry_info * info)256 ncp_iget(struct super_block *sb, struct ncp_entry_info *info)
257 {
258 struct inode *inode;
259
260 if (info == NULL) {
261 pr_err("%s: info is NULL\n", __func__);
262 return NULL;
263 }
264
265 inode = new_inode(sb);
266 if (inode) {
267 atomic_set(&NCP_FINFO(inode)->opened, info->opened);
268
269 inode->i_ino = info->ino;
270 ncp_set_attr(inode, info);
271 if (S_ISREG(inode->i_mode)) {
272 inode->i_op = &ncp_file_inode_operations;
273 inode->i_fop = &ncp_file_operations;
274 } else if (S_ISDIR(inode->i_mode)) {
275 inode->i_op = &ncp_dir_inode_operations;
276 inode->i_fop = &ncp_dir_operations;
277 #ifdef CONFIG_NCPFS_NFS_NS
278 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
279 init_special_inode(inode, inode->i_mode,
280 new_decode_dev(info->i.nfs.rdev));
281 #endif
282 #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
283 } else if (S_ISLNK(inode->i_mode)) {
284 inode->i_op = &ncp_symlink_inode_operations;
285 inode_nohighmem(inode);
286 inode->i_data.a_ops = &ncp_symlink_aops;
287 #endif
288 } else {
289 make_bad_inode(inode);
290 }
291 insert_inode_hash(inode);
292 } else
293 pr_err("%s: iget failed!\n", __func__);
294 return inode;
295 }
296
297 static void
ncp_evict_inode(struct inode * inode)298 ncp_evict_inode(struct inode *inode)
299 {
300 truncate_inode_pages_final(&inode->i_data);
301 clear_inode(inode);
302
303 if (S_ISDIR(inode->i_mode)) {
304 ncp_dbg(2, "put directory %ld\n", inode->i_ino);
305 }
306
307 if (ncp_make_closed(inode) != 0) {
308 /* We can't do anything but complain. */
309 pr_err("%s: could not close\n", __func__);
310 }
311 }
312
ncp_stop_tasks(struct ncp_server * server)313 static void ncp_stop_tasks(struct ncp_server *server) {
314 struct sock* sk = server->ncp_sock->sk;
315
316 lock_sock(sk);
317 sk->sk_error_report = server->error_report;
318 sk->sk_data_ready = server->data_ready;
319 sk->sk_write_space = server->write_space;
320 release_sock(sk);
321 del_timer_sync(&server->timeout_tm);
322
323 flush_work(&server->rcv.tq);
324 if (sk->sk_socket->type == SOCK_STREAM)
325 flush_work(&server->tx.tq);
326 else
327 flush_work(&server->timeout_tq);
328 }
329
ncp_show_options(struct seq_file * seq,struct dentry * root)330 static int ncp_show_options(struct seq_file *seq, struct dentry *root)
331 {
332 struct ncp_server *server = NCP_SBP(root->d_sb);
333 unsigned int tmp;
334
335 if (!uid_eq(server->m.uid, GLOBAL_ROOT_UID))
336 seq_printf(seq, ",uid=%u",
337 from_kuid_munged(&init_user_ns, server->m.uid));
338 if (!gid_eq(server->m.gid, GLOBAL_ROOT_GID))
339 seq_printf(seq, ",gid=%u",
340 from_kgid_munged(&init_user_ns, server->m.gid));
341 if (!uid_eq(server->m.mounted_uid, GLOBAL_ROOT_UID))
342 seq_printf(seq, ",owner=%u",
343 from_kuid_munged(&init_user_ns, server->m.mounted_uid));
344 tmp = server->m.file_mode & S_IALLUGO;
345 if (tmp != NCP_DEFAULT_FILE_MODE)
346 seq_printf(seq, ",mode=0%o", tmp);
347 tmp = server->m.dir_mode & S_IALLUGO;
348 if (tmp != NCP_DEFAULT_DIR_MODE)
349 seq_printf(seq, ",dirmode=0%o", tmp);
350 if (server->m.time_out != NCP_DEFAULT_TIME_OUT * HZ / 100) {
351 tmp = server->m.time_out * 100 / HZ;
352 seq_printf(seq, ",timeout=%u", tmp);
353 }
354 if (server->m.retry_count != NCP_DEFAULT_RETRY_COUNT)
355 seq_printf(seq, ",retry=%u", server->m.retry_count);
356 if (server->m.flags != 0)
357 seq_printf(seq, ",flags=%lu", server->m.flags);
358 if (server->m.wdog_pid != NULL)
359 seq_printf(seq, ",wdogpid=%u", pid_vnr(server->m.wdog_pid));
360
361 return 0;
362 }
363
364 static const struct ncp_option ncp_opts[] = {
365 { "uid", OPT_INT, 'u' },
366 { "gid", OPT_INT, 'g' },
367 { "owner", OPT_INT, 'o' },
368 { "mode", OPT_INT, 'm' },
369 { "dirmode", OPT_INT, 'd' },
370 { "timeout", OPT_INT, 't' },
371 { "retry", OPT_INT, 'r' },
372 { "flags", OPT_INT, 'f' },
373 { "wdogpid", OPT_INT, 'w' },
374 { "ncpfd", OPT_INT, 'n' },
375 { "infofd", OPT_INT, 'i' }, /* v5 */
376 { "version", OPT_INT, 'v' },
377 { NULL, 0, 0 } };
378
ncp_parse_options(struct ncp_mount_data_kernel * data,char * options)379 static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options) {
380 int optval;
381 char *optarg;
382 unsigned long optint;
383 int version = 0;
384 int ret;
385
386 data->flags = 0;
387 data->int_flags = 0;
388 data->mounted_uid = GLOBAL_ROOT_UID;
389 data->wdog_pid = NULL;
390 data->ncp_fd = ~0;
391 data->time_out = NCP_DEFAULT_TIME_OUT;
392 data->retry_count = NCP_DEFAULT_RETRY_COUNT;
393 data->uid = GLOBAL_ROOT_UID;
394 data->gid = GLOBAL_ROOT_GID;
395 data->file_mode = NCP_DEFAULT_FILE_MODE;
396 data->dir_mode = NCP_DEFAULT_DIR_MODE;
397 data->info_fd = -1;
398 data->mounted_vol[0] = 0;
399
400 while ((optval = ncp_getopt("ncpfs", &options, ncp_opts, NULL, &optarg, &optint)) != 0) {
401 ret = optval;
402 if (ret < 0)
403 goto err;
404 switch (optval) {
405 case 'u':
406 data->uid = make_kuid(current_user_ns(), optint);
407 if (!uid_valid(data->uid)) {
408 ret = -EINVAL;
409 goto err;
410 }
411 break;
412 case 'g':
413 data->gid = make_kgid(current_user_ns(), optint);
414 if (!gid_valid(data->gid)) {
415 ret = -EINVAL;
416 goto err;
417 }
418 break;
419 case 'o':
420 data->mounted_uid = make_kuid(current_user_ns(), optint);
421 if (!uid_valid(data->mounted_uid)) {
422 ret = -EINVAL;
423 goto err;
424 }
425 break;
426 case 'm':
427 data->file_mode = optint;
428 break;
429 case 'd':
430 data->dir_mode = optint;
431 break;
432 case 't':
433 data->time_out = optint;
434 break;
435 case 'r':
436 data->retry_count = optint;
437 break;
438 case 'f':
439 data->flags = optint;
440 break;
441 case 'w':
442 data->wdog_pid = find_get_pid(optint);
443 break;
444 case 'n':
445 data->ncp_fd = optint;
446 break;
447 case 'i':
448 data->info_fd = optint;
449 break;
450 case 'v':
451 ret = -ECHRNG;
452 if (optint < NCP_MOUNT_VERSION_V4)
453 goto err;
454 if (optint > NCP_MOUNT_VERSION_V5)
455 goto err;
456 version = optint;
457 break;
458
459 }
460 }
461 return 0;
462 err:
463 put_pid(data->wdog_pid);
464 data->wdog_pid = NULL;
465 return ret;
466 }
467
ncp_fill_super(struct super_block * sb,void * raw_data,int silent)468 static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
469 {
470 struct ncp_mount_data_kernel data;
471 struct ncp_server *server;
472 struct inode *root_inode;
473 struct socket *sock;
474 int error;
475 int default_bufsize;
476 #ifdef CONFIG_NCPFS_PACKET_SIGNING
477 int options;
478 #endif
479 struct ncp_entry_info finfo;
480
481 memset(&data, 0, sizeof(data));
482 server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
483 if (!server)
484 return -ENOMEM;
485 sb->s_fs_info = server;
486
487 error = -EFAULT;
488 if (raw_data == NULL)
489 goto out;
490 switch (*(int*)raw_data) {
491 case NCP_MOUNT_VERSION:
492 {
493 struct ncp_mount_data* md = (struct ncp_mount_data*)raw_data;
494
495 data.flags = md->flags;
496 data.int_flags = NCP_IMOUNT_LOGGEDIN_POSSIBLE;
497 data.mounted_uid = make_kuid(current_user_ns(), md->mounted_uid);
498 data.wdog_pid = find_get_pid(md->wdog_pid);
499 data.ncp_fd = md->ncp_fd;
500 data.time_out = md->time_out;
501 data.retry_count = md->retry_count;
502 data.uid = make_kuid(current_user_ns(), md->uid);
503 data.gid = make_kgid(current_user_ns(), md->gid);
504 data.file_mode = md->file_mode;
505 data.dir_mode = md->dir_mode;
506 data.info_fd = -1;
507 memcpy(data.mounted_vol, md->mounted_vol,
508 NCP_VOLNAME_LEN+1);
509 }
510 break;
511 case NCP_MOUNT_VERSION_V4:
512 {
513 struct ncp_mount_data_v4* md = (struct ncp_mount_data_v4*)raw_data;
514
515 data.flags = md->flags;
516 data.mounted_uid = make_kuid(current_user_ns(), md->mounted_uid);
517 data.wdog_pid = find_get_pid(md->wdog_pid);
518 data.ncp_fd = md->ncp_fd;
519 data.time_out = md->time_out;
520 data.retry_count = md->retry_count;
521 data.uid = make_kuid(current_user_ns(), md->uid);
522 data.gid = make_kgid(current_user_ns(), md->gid);
523 data.file_mode = md->file_mode;
524 data.dir_mode = md->dir_mode;
525 data.info_fd = -1;
526 }
527 break;
528 default:
529 error = -ECHRNG;
530 if (memcmp(raw_data, "vers", 4) == 0) {
531 error = ncp_parse_options(&data, raw_data);
532 }
533 if (error)
534 goto out;
535 break;
536 }
537 error = -EINVAL;
538 if (!uid_valid(data.mounted_uid) || !uid_valid(data.uid) ||
539 !gid_valid(data.gid))
540 goto out;
541 sock = sockfd_lookup(data.ncp_fd, &error);
542 if (!sock)
543 goto out;
544
545 if (sock->type == SOCK_STREAM)
546 default_bufsize = 0xF000;
547 else
548 default_bufsize = 1024;
549
550 sb->s_flags |= MS_NODIRATIME; /* probably even noatime */
551 sb->s_maxbytes = 0xFFFFFFFFU;
552 sb->s_blocksize = 1024; /* Eh... Is this correct? */
553 sb->s_blocksize_bits = 10;
554 sb->s_magic = NCP_SUPER_MAGIC;
555 sb->s_op = &ncp_sops;
556 sb->s_d_op = &ncp_dentry_operations;
557 sb->s_bdi = &server->bdi;
558
559 server = NCP_SBP(sb);
560 memset(server, 0, sizeof(*server));
561
562 error = bdi_setup_and_register(&server->bdi, "ncpfs");
563 if (error)
564 goto out_fput;
565
566 server->ncp_sock = sock;
567
568 if (data.info_fd != -1) {
569 struct socket *info_sock = sockfd_lookup(data.info_fd, &error);
570 if (!info_sock)
571 goto out_bdi;
572 server->info_sock = info_sock;
573 error = -EBADFD;
574 if (info_sock->type != SOCK_STREAM)
575 goto out_fput2;
576 }
577
578 /* server->lock = 0; */
579 mutex_init(&server->mutex);
580 server->packet = NULL;
581 /* server->buffer_size = 0; */
582 /* server->conn_status = 0; */
583 /* server->root_dentry = NULL; */
584 /* server->root_setuped = 0; */
585 mutex_init(&server->root_setup_lock);
586 #ifdef CONFIG_NCPFS_PACKET_SIGNING
587 /* server->sign_wanted = 0; */
588 /* server->sign_active = 0; */
589 #endif
590 init_rwsem(&server->auth_rwsem);
591 server->auth.auth_type = NCP_AUTH_NONE;
592 /* server->auth.object_name_len = 0; */
593 /* server->auth.object_name = NULL; */
594 /* server->auth.object_type = 0; */
595 /* server->priv.len = 0; */
596 /* server->priv.data = NULL; */
597
598 server->m = data;
599 /* Although anything producing this is buggy, it happens
600 now because of PATH_MAX changes.. */
601 if (server->m.time_out < 1) {
602 server->m.time_out = 10;
603 pr_info("You need to recompile your ncpfs utils..\n");
604 }
605 server->m.time_out = server->m.time_out * HZ / 100;
606 server->m.file_mode = (server->m.file_mode & S_IRWXUGO) | S_IFREG;
607 server->m.dir_mode = (server->m.dir_mode & S_IRWXUGO) | S_IFDIR;
608
609 #ifdef CONFIG_NCPFS_NLS
610 /* load the default NLS charsets */
611 server->nls_vol = load_nls_default();
612 server->nls_io = load_nls_default();
613 #endif /* CONFIG_NCPFS_NLS */
614
615 atomic_set(&server->dentry_ttl, 0); /* no caching */
616
617 INIT_LIST_HEAD(&server->tx.requests);
618 mutex_init(&server->rcv.creq_mutex);
619 server->tx.creq = NULL;
620 server->rcv.creq = NULL;
621
622 init_timer(&server->timeout_tm);
623 #undef NCP_PACKET_SIZE
624 #define NCP_PACKET_SIZE 131072
625 error = -ENOMEM;
626 server->packet_size = NCP_PACKET_SIZE;
627 server->packet = vmalloc(NCP_PACKET_SIZE);
628 if (server->packet == NULL)
629 goto out_nls;
630 server->txbuf = vmalloc(NCP_PACKET_SIZE);
631 if (server->txbuf == NULL)
632 goto out_packet;
633 server->rxbuf = vmalloc(NCP_PACKET_SIZE);
634 if (server->rxbuf == NULL)
635 goto out_txbuf;
636
637 lock_sock(sock->sk);
638 server->data_ready = sock->sk->sk_data_ready;
639 server->write_space = sock->sk->sk_write_space;
640 server->error_report = sock->sk->sk_error_report;
641 sock->sk->sk_user_data = server;
642 sock->sk->sk_data_ready = ncp_tcp_data_ready;
643 sock->sk->sk_error_report = ncp_tcp_error_report;
644 if (sock->type == SOCK_STREAM) {
645 server->rcv.ptr = (unsigned char*)&server->rcv.buf;
646 server->rcv.len = 10;
647 server->rcv.state = 0;
648 INIT_WORK(&server->rcv.tq, ncp_tcp_rcv_proc);
649 INIT_WORK(&server->tx.tq, ncp_tcp_tx_proc);
650 sock->sk->sk_write_space = ncp_tcp_write_space;
651 } else {
652 INIT_WORK(&server->rcv.tq, ncpdgram_rcv_proc);
653 INIT_WORK(&server->timeout_tq, ncpdgram_timeout_proc);
654 server->timeout_tm.data = (unsigned long)server;
655 server->timeout_tm.function = ncpdgram_timeout_call;
656 }
657 release_sock(sock->sk);
658
659 ncp_lock_server(server);
660 error = ncp_connect(server);
661 ncp_unlock_server(server);
662 if (error < 0)
663 goto out_rxbuf;
664 ncp_dbg(1, "NCP_SBP(sb) = %p\n", NCP_SBP(sb));
665
666 error = -EMSGSIZE; /* -EREMOTESIDEINCOMPATIBLE */
667 #ifdef CONFIG_NCPFS_PACKET_SIGNING
668 if (ncp_negotiate_size_and_options(server, default_bufsize,
669 NCP_DEFAULT_OPTIONS, &(server->buffer_size), &options) == 0)
670 {
671 if (options != NCP_DEFAULT_OPTIONS)
672 {
673 if (ncp_negotiate_size_and_options(server,
674 default_bufsize,
675 options & 2,
676 &(server->buffer_size), &options) != 0)
677
678 {
679 goto out_disconnect;
680 }
681 }
682 ncp_lock_server(server);
683 if (options & 2)
684 server->sign_wanted = 1;
685 ncp_unlock_server(server);
686 }
687 else
688 #endif /* CONFIG_NCPFS_PACKET_SIGNING */
689 if (ncp_negotiate_buffersize(server, default_bufsize,
690 &(server->buffer_size)) != 0)
691 goto out_disconnect;
692 ncp_dbg(1, "bufsize = %d\n", server->buffer_size);
693
694 memset(&finfo, 0, sizeof(finfo));
695 finfo.i.attributes = aDIR;
696 finfo.i.dataStreamSize = 0; /* ignored */
697 finfo.i.dirEntNum = 0;
698 finfo.i.DosDirNum = 0;
699 #ifdef CONFIG_NCPFS_SMALLDOS
700 finfo.i.NSCreator = NW_NS_DOS;
701 #endif
702 finfo.volume = NCP_NUMBER_OF_VOLUMES;
703 /* set dates of mountpoint to Jan 1, 1986; 00:00 */
704 finfo.i.creationTime = finfo.i.modifyTime
705 = cpu_to_le16(0x0000);
706 finfo.i.creationDate = finfo.i.modifyDate
707 = finfo.i.lastAccessDate
708 = cpu_to_le16(0x0C21);
709 finfo.i.nameLen = 0;
710 finfo.i.entryName[0] = '\0';
711
712 finfo.opened = 0;
713 finfo.ino = 2; /* tradition */
714
715 server->name_space[finfo.volume] = NW_NS_DOS;
716
717 error = -ENOMEM;
718 root_inode = ncp_iget(sb, &finfo);
719 if (!root_inode)
720 goto out_disconnect;
721 ncp_dbg(1, "root vol=%d\n", NCP_FINFO(root_inode)->volNumber);
722 sb->s_root = d_make_root(root_inode);
723 if (!sb->s_root)
724 goto out_disconnect;
725 return 0;
726
727 out_disconnect:
728 ncp_lock_server(server);
729 ncp_disconnect(server);
730 ncp_unlock_server(server);
731 out_rxbuf:
732 ncp_stop_tasks(server);
733 vfree(server->rxbuf);
734 out_txbuf:
735 vfree(server->txbuf);
736 out_packet:
737 vfree(server->packet);
738 out_nls:
739 #ifdef CONFIG_NCPFS_NLS
740 unload_nls(server->nls_io);
741 unload_nls(server->nls_vol);
742 #endif
743 mutex_destroy(&server->rcv.creq_mutex);
744 mutex_destroy(&server->root_setup_lock);
745 mutex_destroy(&server->mutex);
746 out_fput2:
747 if (server->info_sock)
748 sockfd_put(server->info_sock);
749 out_bdi:
750 bdi_destroy(&server->bdi);
751 out_fput:
752 sockfd_put(sock);
753 out:
754 put_pid(data.wdog_pid);
755 sb->s_fs_info = NULL;
756 kfree(server);
757 return error;
758 }
759
delayed_free(struct rcu_head * p)760 static void delayed_free(struct rcu_head *p)
761 {
762 struct ncp_server *server = container_of(p, struct ncp_server, rcu);
763 #ifdef CONFIG_NCPFS_NLS
764 /* unload the NLS charsets */
765 unload_nls(server->nls_vol);
766 unload_nls(server->nls_io);
767 #endif /* CONFIG_NCPFS_NLS */
768 kfree(server);
769 }
770
ncp_put_super(struct super_block * sb)771 static void ncp_put_super(struct super_block *sb)
772 {
773 struct ncp_server *server = NCP_SBP(sb);
774
775 ncp_lock_server(server);
776 ncp_disconnect(server);
777 ncp_unlock_server(server);
778
779 ncp_stop_tasks(server);
780
781 mutex_destroy(&server->rcv.creq_mutex);
782 mutex_destroy(&server->root_setup_lock);
783 mutex_destroy(&server->mutex);
784
785 if (server->info_sock)
786 sockfd_put(server->info_sock);
787 sockfd_put(server->ncp_sock);
788 kill_pid(server->m.wdog_pid, SIGTERM, 1);
789 put_pid(server->m.wdog_pid);
790
791 bdi_destroy(&server->bdi);
792 kfree(server->priv.data);
793 kfree(server->auth.object_name);
794 vfree(server->rxbuf);
795 vfree(server->txbuf);
796 vfree(server->packet);
797 call_rcu(&server->rcu, delayed_free);
798 }
799
ncp_statfs(struct dentry * dentry,struct kstatfs * buf)800 static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf)
801 {
802 struct dentry* d;
803 struct inode* i;
804 struct ncp_inode_info* ni;
805 struct ncp_server* s;
806 struct ncp_volume_info vi;
807 struct super_block *sb = dentry->d_sb;
808 int err;
809 __u8 dh;
810
811 d = sb->s_root;
812 if (!d) {
813 goto dflt;
814 }
815 i = d_inode(d);
816 if (!i) {
817 goto dflt;
818 }
819 ni = NCP_FINFO(i);
820 if (!ni) {
821 goto dflt;
822 }
823 s = NCP_SBP(sb);
824 if (!s) {
825 goto dflt;
826 }
827 if (!s->m.mounted_vol[0]) {
828 goto dflt;
829 }
830
831 err = ncp_dirhandle_alloc(s, ni->volNumber, ni->DosDirNum, &dh);
832 if (err) {
833 goto dflt;
834 }
835 err = ncp_get_directory_info(s, dh, &vi);
836 ncp_dirhandle_free(s, dh);
837 if (err) {
838 goto dflt;
839 }
840 buf->f_type = NCP_SUPER_MAGIC;
841 buf->f_bsize = vi.sectors_per_block * 512;
842 buf->f_blocks = vi.total_blocks;
843 buf->f_bfree = vi.free_blocks;
844 buf->f_bavail = vi.free_blocks;
845 buf->f_files = vi.total_dir_entries;
846 buf->f_ffree = vi.available_dir_entries;
847 buf->f_namelen = 12;
848 return 0;
849
850 /* We cannot say how much disk space is left on a mounted
851 NetWare Server, because free space is distributed over
852 volumes, and the current user might have disk quotas. So
853 free space is not that simple to determine. Our decision
854 here is to err conservatively. */
855
856 dflt:;
857 buf->f_type = NCP_SUPER_MAGIC;
858 buf->f_bsize = NCP_BLOCK_SIZE;
859 buf->f_blocks = 0;
860 buf->f_bfree = 0;
861 buf->f_bavail = 0;
862 buf->f_namelen = 12;
863 return 0;
864 }
865
ncp_notify_change(struct dentry * dentry,struct iattr * attr)866 int ncp_notify_change(struct dentry *dentry, struct iattr *attr)
867 {
868 struct inode *inode = d_inode(dentry);
869 int result = 0;
870 __le32 info_mask;
871 struct nw_modify_dos_info info;
872 struct ncp_server *server;
873
874 result = -EIO;
875
876 server = NCP_SERVER(inode);
877 if (!server) /* How this could happen? */
878 goto out;
879
880 result = -EPERM;
881 if (IS_DEADDIR(d_inode(dentry)))
882 goto out;
883
884 /* ageing the dentry to force validation */
885 ncp_age_dentry(server, dentry);
886
887 result = setattr_prepare(dentry, attr);
888 if (result < 0)
889 goto out;
890
891 result = -EPERM;
892 if ((attr->ia_valid & ATTR_UID) && !uid_eq(attr->ia_uid, server->m.uid))
893 goto out;
894
895 if ((attr->ia_valid & ATTR_GID) && !gid_eq(attr->ia_gid, server->m.gid))
896 goto out;
897
898 if (((attr->ia_valid & ATTR_MODE) &&
899 (attr->ia_mode &
900 ~(S_IFREG | S_IFDIR | S_IRWXUGO))))
901 goto out;
902
903 info_mask = 0;
904 memset(&info, 0, sizeof(info));
905
906 #if 1
907 if ((attr->ia_valid & ATTR_MODE) != 0)
908 {
909 umode_t newmode = attr->ia_mode;
910
911 info_mask |= DM_ATTRIBUTES;
912
913 if (S_ISDIR(inode->i_mode)) {
914 newmode &= server->m.dir_mode;
915 } else {
916 #ifdef CONFIG_NCPFS_EXTRAS
917 if (server->m.flags & NCP_MOUNT_EXTRAS) {
918 /* any non-default execute bit set */
919 if (newmode & ~server->m.file_mode & S_IXUGO)
920 info.attributes |= aSHARED | aSYSTEM;
921 /* read for group/world and not in default file_mode */
922 else if (newmode & ~server->m.file_mode & S_IRUGO)
923 info.attributes |= aSHARED;
924 } else
925 #endif
926 newmode &= server->m.file_mode;
927 }
928 if (newmode & S_IWUGO)
929 info.attributes &= ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
930 else
931 info.attributes |= (aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
932
933 #ifdef CONFIG_NCPFS_NFS_NS
934 if (ncp_is_nfs_extras(server, NCP_FINFO(inode)->volNumber)) {
935 result = ncp_modify_nfs_info(server,
936 NCP_FINFO(inode)->volNumber,
937 NCP_FINFO(inode)->dirEntNum,
938 attr->ia_mode, 0);
939 if (result != 0)
940 goto out;
941 info.attributes &= ~(aSHARED | aSYSTEM);
942 {
943 /* mark partial success */
944 struct iattr tmpattr;
945
946 tmpattr.ia_valid = ATTR_MODE;
947 tmpattr.ia_mode = attr->ia_mode;
948
949 setattr_copy(inode, &tmpattr);
950 mark_inode_dirty(inode);
951 }
952 }
953 #endif
954 }
955 #endif
956
957 /* Do SIZE before attributes, otherwise mtime together with size does not work...
958 */
959 if ((attr->ia_valid & ATTR_SIZE) != 0) {
960 int written;
961
962 ncp_dbg(1, "trying to change size to %llu\n", attr->ia_size);
963
964 if ((result = ncp_make_open(inode, O_WRONLY)) < 0) {
965 result = -EACCES;
966 goto out;
967 }
968 ncp_write_kernel(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle,
969 attr->ia_size, 0, "", &written);
970
971 /* According to ndir, the changes only take effect after
972 closing the file */
973 ncp_inode_close(inode);
974 result = ncp_make_closed(inode);
975 if (result)
976 goto out;
977
978 if (attr->ia_size != i_size_read(inode)) {
979 truncate_setsize(inode, attr->ia_size);
980 mark_inode_dirty(inode);
981 }
982 }
983 if ((attr->ia_valid & ATTR_CTIME) != 0) {
984 info_mask |= (DM_CREATE_TIME | DM_CREATE_DATE);
985 ncp_date_unix2dos(attr->ia_ctime.tv_sec,
986 &info.creationTime, &info.creationDate);
987 }
988 if ((attr->ia_valid & ATTR_MTIME) != 0) {
989 info_mask |= (DM_MODIFY_TIME | DM_MODIFY_DATE);
990 ncp_date_unix2dos(attr->ia_mtime.tv_sec,
991 &info.modifyTime, &info.modifyDate);
992 }
993 if ((attr->ia_valid & ATTR_ATIME) != 0) {
994 __le16 dummy;
995 info_mask |= (DM_LAST_ACCESS_DATE);
996 ncp_date_unix2dos(attr->ia_atime.tv_sec,
997 &dummy, &info.lastAccessDate);
998 }
999 if (info_mask != 0) {
1000 result = ncp_modify_file_or_subdir_dos_info(NCP_SERVER(inode),
1001 inode, info_mask, &info);
1002 if (result != 0) {
1003 if (info_mask == (DM_CREATE_TIME | DM_CREATE_DATE)) {
1004 /* NetWare seems not to allow this. I
1005 do not know why. So, just tell the
1006 user everything went fine. This is
1007 a terrible hack, but I do not know
1008 how to do this correctly. */
1009 result = 0;
1010 } else
1011 goto out;
1012 }
1013 #ifdef CONFIG_NCPFS_STRONG
1014 if ((!result) && (info_mask & DM_ATTRIBUTES))
1015 NCP_FINFO(inode)->nwattr = info.attributes;
1016 #endif
1017 }
1018 if (result)
1019 goto out;
1020
1021 setattr_copy(inode, attr);
1022 mark_inode_dirty(inode);
1023
1024 out:
1025 if (result > 0)
1026 result = -EACCES;
1027 return result;
1028 }
1029
ncp_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)1030 static struct dentry *ncp_mount(struct file_system_type *fs_type,
1031 int flags, const char *dev_name, void *data)
1032 {
1033 return mount_nodev(fs_type, flags, data, ncp_fill_super);
1034 }
1035
1036 static struct file_system_type ncp_fs_type = {
1037 .owner = THIS_MODULE,
1038 .name = "ncpfs",
1039 .mount = ncp_mount,
1040 .kill_sb = kill_anon_super,
1041 .fs_flags = FS_BINARY_MOUNTDATA,
1042 };
1043 MODULE_ALIAS_FS("ncpfs");
1044
init_ncp_fs(void)1045 static int __init init_ncp_fs(void)
1046 {
1047 int err;
1048 ncp_dbg(1, "called\n");
1049
1050 err = init_inodecache();
1051 if (err)
1052 goto out1;
1053 err = register_filesystem(&ncp_fs_type);
1054 if (err)
1055 goto out;
1056 return 0;
1057 out:
1058 destroy_inodecache();
1059 out1:
1060 return err;
1061 }
1062
exit_ncp_fs(void)1063 static void __exit exit_ncp_fs(void)
1064 {
1065 ncp_dbg(1, "called\n");
1066 unregister_filesystem(&ncp_fs_type);
1067 destroy_inodecache();
1068 }
1069
1070 module_init(init_ncp_fs)
1071 module_exit(exit_ncp_fs)
1072 MODULE_LICENSE("GPL");
1073