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Merge tag 'for-linus-4.10-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-zesty-kernel.git] / fs / ncpfs / inode.c
CommitLineData
1da177e4
LT		 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
b41f8b84
JP		 12#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
1da177e4
LT		 14#include <linux/module.h>
15
7c0f6ba6 16#include <linux/uaccess.h>
1da177e4
LT		 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>
1da177e4 30#include <linux/vfs.h>
564cd138
MS		 31#include <linux/mount.h>
32#include <linux/seq_file.h>
34286d66 33#include <linux/namei.h>
1da177e4 34
1da177e4
LT		 35#include <net/sock.h>
36
32c419d9 37#include "ncp_fs.h"
1da177e4
LT		 38#include "getopt.h"
39
564cd138
MS		 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
94ee8494 45static void ncp_evict_inode(struct inode *);
1da177e4 46static void ncp_put_super(struct super_block *);
726c3342 47static int ncp_statfs(struct dentry *, struct kstatfs *);
34c80b1d 48static int ncp_show_options(struct seq_file *, struct dentry *);
1da177e4 49
e18b890b 50static struct kmem_cache * ncp_inode_cachep;
1da177e4
LT		 51
52static struct inode *ncp_alloc_inode(struct super_block *sb)
53{
54 struct ncp_inode_info *ei;
e94b1766 55 ei = (struct ncp_inode_info *)kmem_cache_alloc(ncp_inode_cachep, GFP_KERNEL);
1da177e4
LT		 56 if (!ei)
57 return NULL;
58 return &ei->vfs_inode;
59}
60
fa0d7e3d 61static void ncp_i_callback(struct rcu_head *head)
1da177e4 62{
fa0d7e3d 63 struct inode *inode = container_of(head, struct inode, i_rcu);
1da177e4
LT		 64 kmem_cache_free(ncp_inode_cachep, NCP_FINFO(inode));
65}
66
fa0d7e3d
NP		 67static void ncp_destroy_inode(struct inode *inode)
68{
69 call_rcu(&inode->i_rcu, ncp_i_callback);
70}
71
51cc5068 72static void init_once(void *foo)
1da177e4
LT		 73{
74 struct ncp_inode_info *ei = (struct ncp_inode_info *) foo;
75
a35afb83
CL		 76 mutex_init(&ei->open_mutex);
77 inode_init_once(&ei->vfs_inode);
1da177e4 78}
20c2df83 79
1da177e4
LT		 80static int init_inodecache(void)
81{
82 ncp_inode_cachep = kmem_cache_create("ncp_inode_cache",
83 sizeof(struct ncp_inode_info),
fffb60f9 84 0, (SLAB_RECLAIM_ACCOUNT|
5d097056 85 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
20c2df83 86 init_once);
1da177e4
LT		 87 if (ncp_inode_cachep == NULL)
88 return -ENOMEM;
89 return 0;
90}
91
92static void destroy_inodecache(void)
93{
8c0a8537
KS		 94 /*
95 * Make sure all delayed rcu free inodes are flushed before we
96 * destroy cache.
97 */
98 rcu_barrier();
1a1d92c1 99 kmem_cache_destroy(ncp_inode_cachep);
1da177e4
LT		 100}
101
102static int ncp_remount(struct super_block *sb, int *flags, char* data)
103{
02b9984d 104 sync_filesystem(sb);
1da177e4
LT		 105 *flags |= MS_NODIRATIME;
106 return 0;
107}
108
ee9b6d61 109static const struct super_operations ncp_sops =
1da177e4
LT		 110{
111 .alloc_inode = ncp_alloc_inode,
112 .destroy_inode = ncp_destroy_inode,
113 .drop_inode = generic_delete_inode,
94ee8494 114 .evict_inode = ncp_evict_inode,
1da177e4
LT		 115 .put_super = ncp_put_super,
116 .statfs = ncp_statfs,
117 .remount_fs = ncp_remount,
564cd138 118 .show_options = ncp_show_options,
1da177e4
LT		 119};
120
1da177e4
LT		 121/*
122 * Fill in the ncpfs-specific information in the inode.
123 */
124static 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
131void 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));
d3b73ca1 138 ncp_dbg(1, "updated %s, volnum=%d, dirent=%u\n",
1da177e4
LT		 139 nwinfo->i.entryName, NCP_FINFO(inode)->volNumber,
140 NCP_FINFO(inode)->dirEntNum);
141}
142
143static void ncp_update_dates(struct inode *inode, struct nw_info_struct *nwi)
144{
145 /* NFS namespace mode overrides others if it's set. */
d3b73ca1 146 ncp_dbg(1, "(%s) nfs.mode=0%o\n", nwi->entryName, nwi->nfs.mode);
1da177e4
LT		 147 if (nwi->nfs.mode) {
148 /* XXX Security? */
149 inode->i_mode = nwi->nfs.mode;
150 }
151
2e54eb96 152 inode->i_blocks = (i_size_read(inode) + NCP_BLOCK_SIZE - 1) >> NCP_BLOCK_SHIFT;
1da177e4
LT		 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
162static 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 ??? */
2e54eb96 171 i_size_write(inode, NCP_BLOCK_SIZE);
1da177e4 172 } else {
2e54eb96
PV		 173 u32 size;
174
1da177e4 175 inode->i_mode = server->m.file_mode;
2e54eb96
PV		 176 size = le32_to_cpu(nwi->dataStreamSize);
177 i_size_write(inode, size);
1da177e4
LT		 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) {
2e54eb96
PV		 184 if (/* (size >= NCP_MIN_SYMLINK_SIZE)
185 && */ (size <= NCP_MAX_SYMLINK_SIZE)) {
1da177e4
LT		 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
211void 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/*
2e54eb96 224 * Fill in the inode based on the ncp_entry_info structure. Used only for brand new inodes.
1da177e4
LT		 225 */
226static 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
d3b73ca1 234 ncp_dbg(2, "inode->i_mode = %u\n", inode->i_mode);
1da177e4 235
bfe86848 236 set_nlink(inode, 1);
1da177e4
LT		 237 inode->i_uid = server->m.uid;
238 inode->i_gid = server->m.gid;
1da177e4
LT		 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)
92e1d5be 245static const struct inode_operations ncp_symlink_inode_operations = {
6b255391 246 .get_link = page_get_link,
1da177e4
LT		 247 .setattr = ncp_notify_change,
248};
249#endif
250
251/*
252 * Get a new inode.
253 */
254struct inode *
255ncp_iget(struct super_block *sb, struct ncp_entry_info *info)
256{
257 struct inode *inode;
258
259 if (info == NULL) {
b41f8b84 260 pr_err("%s: info is NULL\n", __func__);
1da177e4
LT		 261 return NULL;
262 }
263
264 inode = new_inode(sb);
265 if (inode) {
266 atomic_set(&NCP_FINFO(inode)->opened, info->opened);
267
268 inode->i_ino = info->ino;
269 ncp_set_attr(inode, info);
270 if (S_ISREG(inode->i_mode)) {
271 inode->i_op = &ncp_file_inode_operations;
272 inode->i_fop = &ncp_file_operations;
273 } else if (S_ISDIR(inode->i_mode)) {
274 inode->i_op = &ncp_dir_inode_operations;
275 inode->i_fop = &ncp_dir_operations;
276#ifdef CONFIG_NCPFS_NFS_NS
277 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
278 init_special_inode(inode, inode->i_mode,
279 new_decode_dev(info->i.nfs.rdev));
280#endif
281#if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
282 } else if (S_ISLNK(inode->i_mode)) {
283 inode->i_op = &ncp_symlink_inode_operations;
21fc61c7 284 inode_nohighmem(inode);
1da177e4
LT		 285 inode->i_data.a_ops = &ncp_symlink_aops;
286#endif
287 } else {
288 make_bad_inode(inode);
289 }
290 insert_inode_hash(inode);
291 } else
b41f8b84 292 pr_err("%s: iget failed!\n", __func__);
1da177e4
LT		 293 return inode;
294}
295
296static void
94ee8494 297ncp_evict_inode(struct inode *inode)
1da177e4 298{
91b0abe3 299 truncate_inode_pages_final(&inode->i_data);
dbd5768f 300 clear_inode(inode);
fef26658 301
1da177e4 302 if (S_ISDIR(inode->i_mode)) {
d3b73ca1 303 ncp_dbg(2, "put directory %ld\n", inode->i_ino);
1da177e4
LT		 304 }
305
306 if (ncp_make_closed(inode) != 0) {
307 /* We can't do anything but complain. */
b41f8b84 308 pr_err("%s: could not close\n", __func__);
1da177e4 309 }
1da177e4
LT		 310}
311
312static void ncp_stop_tasks(struct ncp_server *server) {
313 struct sock* sk = server->ncp_sock->sk;
2a4df5d3
PV		 314
315 lock_sock(sk);
1da177e4
LT		 316 sk->sk_error_report = server->error_report;
317 sk->sk_data_ready = server->data_ready;
318 sk->sk_write_space = server->write_space;
2a4df5d3 319 release_sock(sk);
1da177e4 320 del_timer_sync(&server->timeout_tm);
5d8e4bdd 321
43829731 322 flush_work(&server->rcv.tq);
5d8e4bdd 323 if (sk->sk_socket->type == SOCK_STREAM)
43829731 324 flush_work(&server->tx.tq);
5d8e4bdd 325 else
43829731 326 flush_work(&server->timeout_tq);
1da177e4
LT		 327}
328
34c80b1d 329static int ncp_show_options(struct seq_file *seq, struct dentry *root)
564cd138 330{
34c80b1d 331 struct ncp_server *server = NCP_SBP(root->d_sb);
564cd138
MS		 332 unsigned int tmp;
333
1ac7fd81
EB		 334 if (!uid_eq(server->m.uid, GLOBAL_ROOT_UID))
335 seq_printf(seq, ",uid=%u",
336 from_kuid_munged(&init_user_ns, server->m.uid));
337 if (!gid_eq(server->m.gid, GLOBAL_ROOT_GID))
338 seq_printf(seq, ",gid=%u",
339 from_kgid_munged(&init_user_ns, server->m.gid));
340 if (!uid_eq(server->m.mounted_uid, GLOBAL_ROOT_UID))
341 seq_printf(seq, ",owner=%u",
342 from_kuid_munged(&init_user_ns, server->m.mounted_uid));
564cd138
MS		 343 tmp = server->m.file_mode & S_IALLUGO;
344 if (tmp != NCP_DEFAULT_FILE_MODE)
345 seq_printf(seq, ",mode=0%o", tmp);
346 tmp = server->m.dir_mode & S_IALLUGO;
347 if (tmp != NCP_DEFAULT_DIR_MODE)
348 seq_printf(seq, ",dirmode=0%o", tmp);
349 if (server->m.time_out != NCP_DEFAULT_TIME_OUT * HZ / 100) {
350 tmp = server->m.time_out * 100 / HZ;
351 seq_printf(seq, ",timeout=%u", tmp);
352 }
353 if (server->m.retry_count != NCP_DEFAULT_RETRY_COUNT)
354 seq_printf(seq, ",retry=%u", server->m.retry_count);
355 if (server->m.flags != 0)
356 seq_printf(seq, ",flags=%lu", server->m.flags);
357 if (server->m.wdog_pid != NULL)
358 seq_printf(seq, ",wdogpid=%u", pid_vnr(server->m.wdog_pid));
359
360 return 0;
361}
362
1da177e4
LT		 363static const struct ncp_option ncp_opts[] = {
364 { "uid", OPT_INT, 'u' },
365 { "gid", OPT_INT, 'g' },
366 { "owner", OPT_INT, 'o' },
367 { "mode", OPT_INT, 'm' },
368 { "dirmode", OPT_INT, 'd' },
369 { "timeout", OPT_INT, 't' },
370 { "retry", OPT_INT, 'r' },
371 { "flags", OPT_INT, 'f' },
372 { "wdogpid", OPT_INT, 'w' },
373 { "ncpfd", OPT_INT, 'n' },
374 { "infofd", OPT_INT, 'i' }, /* v5 */
375 { "version", OPT_INT, 'v' },
376 { NULL, 0, 0 } };
377
378static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options) {
379 int optval;
380 char *optarg;
381 unsigned long optint;
382 int version = 0;
1de24126 383 int ret;
1da177e4
LT		 384
385 data->flags = 0;
386 data->int_flags = 0;
1ac7fd81 387 data->mounted_uid = GLOBAL_ROOT_UID;
2154227a 388 data->wdog_pid = NULL;
1da177e4 389 data->ncp_fd = ~0;
564cd138
MS		 390 data->time_out = NCP_DEFAULT_TIME_OUT;
391 data->retry_count = NCP_DEFAULT_RETRY_COUNT;
1ac7fd81
EB		 392 data->uid = GLOBAL_ROOT_UID;
393 data->gid = GLOBAL_ROOT_GID;
564cd138
MS		 394 data->file_mode = NCP_DEFAULT_FILE_MODE;
395 data->dir_mode = NCP_DEFAULT_DIR_MODE;
1da177e4
LT		 396 data->info_fd = -1;
397 data->mounted_vol[0] = 0;
398
399 while ((optval = ncp_getopt("ncpfs", &options, ncp_opts, NULL, &optarg, &optint)) != 0) {
1de24126
EB		 400 ret = optval;
401 if (ret < 0)
402 goto err;
1da177e4
LT		 403 switch (optval) {
404 case 'u':
1ac7fd81 405 data->uid = make_kuid(current_user_ns(), optint);
4fbeb19d
WY		 406 if (!uid_valid(data->uid)) {
407 ret = -EINVAL;
1ac7fd81 408 goto err;
4fbeb19d 409 }
1da177e4
LT		 410 break;
411 case 'g':
1ac7fd81 412 data->gid = make_kgid(current_user_ns(), optint);
4fbeb19d
WY		 413 if (!gid_valid(data->gid)) {
414 ret = -EINVAL;
1ac7fd81 415 goto err;
4fbeb19d 416 }
1da177e4
LT		 417 break;
418 case 'o':
1ac7fd81 419 data->mounted_uid = make_kuid(current_user_ns(), optint);
4fbeb19d
WY		 420 if (!uid_valid(data->mounted_uid)) {
421 ret = -EINVAL;
1ac7fd81 422 goto err;
4fbeb19d 423 }
1da177e4
LT		 424 break;
425 case 'm':
426 data->file_mode = optint;
427 break;
428 case 'd':
429 data->dir_mode = optint;
430 break;
431 case 't':
432 data->time_out = optint;
433 break;
434 case 'r':
435 data->retry_count = optint;
436 break;
437 case 'f':
438 data->flags = optint;
439 break;
440 case 'w':
2154227a 441 data->wdog_pid = find_get_pid(optint);
1da177e4
LT		 442 break;
443 case 'n':
444 data->ncp_fd = optint;
445 break;
446 case 'i':
447 data->info_fd = optint;
448 break;
449 case 'v':
1de24126
EB		 450 ret = -ECHRNG;
451 if (optint < NCP_MOUNT_VERSION_V4)
452 goto err;
453 if (optint > NCP_MOUNT_VERSION_V5)
454 goto err;
1da177e4
LT		 455 version = optint;
456 break;
457
458 }
459 }
460 return 0;
1de24126
EB		 461err:
462 put_pid(data->wdog_pid);
463 data->wdog_pid = NULL;
464 return ret;
1da177e4
LT		 465}
466
467static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
468{
469 struct ncp_mount_data_kernel data;
470 struct ncp_server *server;
1da177e4 471 struct inode *root_inode;
1da177e4
LT		 472 struct socket *sock;
473 int error;
474 int default_bufsize;
475#ifdef CONFIG_NCPFS_PACKET_SIGNING
476 int options;
477#endif
478 struct ncp_entry_info finfo;
479
2a5cac17 480 memset(&data, 0, sizeof(data));
f8314dc6 481 server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
1da177e4
LT		 482 if (!server)
483 return -ENOMEM;
484 sb->s_fs_info = server;
1da177e4
LT		 485
486 error = -EFAULT;
487 if (raw_data == NULL)
488 goto out;
489 switch (*(int*)raw_data) {
490 case NCP_MOUNT_VERSION:
491 {
492 struct ncp_mount_data* md = (struct ncp_mount_data*)raw_data;
493
494 data.flags = md->flags;
495 data.int_flags = NCP_IMOUNT_LOGGEDIN_POSSIBLE;
1ac7fd81 496 data.mounted_uid = make_kuid(current_user_ns(), md->mounted_uid);
2154227a 497 data.wdog_pid = find_get_pid(md->wdog_pid);
1da177e4
LT		 498 data.ncp_fd = md->ncp_fd;
499 data.time_out = md->time_out;
500 data.retry_count = md->retry_count;
1ac7fd81
EB		 501 data.uid = make_kuid(current_user_ns(), md->uid);
502 data.gid = make_kgid(current_user_ns(), md->gid);
1da177e4
LT		 503 data.file_mode = md->file_mode;
504 data.dir_mode = md->dir_mode;
505 data.info_fd = -1;
506 memcpy(data.mounted_vol, md->mounted_vol,
507 NCP_VOLNAME_LEN+1);
508 }
509 break;
510 case NCP_MOUNT_VERSION_V4:
511 {
512 struct ncp_mount_data_v4* md = (struct ncp_mount_data_v4*)raw_data;
513
514 data.flags = md->flags;
1ac7fd81 515 data.mounted_uid = make_kuid(current_user_ns(), md->mounted_uid);
2154227a 516 data.wdog_pid = find_get_pid(md->wdog_pid);
1da177e4
LT		 517 data.ncp_fd = md->ncp_fd;
518 data.time_out = md->time_out;
519 data.retry_count = md->retry_count;
1ac7fd81
EB		 520 data.uid = make_kuid(current_user_ns(), md->uid);
521 data.gid = make_kgid(current_user_ns(), md->gid);
1da177e4
LT		 522 data.file_mode = md->file_mode;
523 data.dir_mode = md->dir_mode;
524 data.info_fd = -1;
1da177e4
LT		 525 }
526 break;
527 default:
528 error = -ECHRNG;
529 if (memcmp(raw_data, "vers", 4) == 0) {
530 error = ncp_parse_options(&data, raw_data);
531 }
532 if (error)
533 goto out;
534 break;
535 }
1ac7fd81
EB		 536 error = -EINVAL;
537 if (!uid_valid(data.mounted_uid) || !uid_valid(data.uid) ||
538 !gid_valid(data.gid))
539 goto out;
44ba8406 540 sock = sockfd_lookup(data.ncp_fd, &error);
1da177e4 541 if (!sock)
44ba8406
AV		 542 goto out;
543
1da177e4
LT		 544 if (sock->type == SOCK_STREAM)
545 default_bufsize = 0xF000;
546 else
547 default_bufsize = 1024;
548
549 sb->s_flags |= MS_NODIRATIME; /* probably even noatime */
550 sb->s_maxbytes = 0xFFFFFFFFU;
551 sb->s_blocksize = 1024; /* Eh... Is this correct? */
552 sb->s_blocksize_bits = 10;
553 sb->s_magic = NCP_SUPER_MAGIC;
554 sb->s_op = &ncp_sops;
0378c405 555 sb->s_d_op = &ncp_dentry_operations;
f1970c73 556 sb->s_bdi = &server->bdi;
1da177e4
LT		 557
558 server = NCP_SBP(sb);
559 memset(server, 0, sizeof(*server));
560
b4caecd4 561 error = bdi_setup_and_register(&server->bdi, "ncpfs");
f1970c73 562 if (error)
759c361e 563 goto out_fput;
f1970c73 564
1da177e4
LT		 565 server->ncp_sock = sock;
566
567 if (data.info_fd != -1) {
44ba8406 568 struct socket *info_sock = sockfd_lookup(data.info_fd, &error);
1da177e4 569 if (!info_sock)
44ba8406
AV		 570 goto out_bdi;
571 server->info_sock = info_sock;
1da177e4
LT		 572 error = -EBADFD;
573 if (info_sock->type != SOCK_STREAM)
574 goto out_fput2;
1da177e4
LT		 575 }
576
577/* server->lock = 0; */
8e3f9045 578 mutex_init(&server->mutex);
1da177e4
LT		 579 server->packet = NULL;
580/* server->buffer_size = 0; */
581/* server->conn_status = 0; */
582/* server->root_dentry = NULL; */
583/* server->root_setuped = 0; */
2e54eb96 584 mutex_init(&server->root_setup_lock);
1da177e4
LT		 585#ifdef CONFIG_NCPFS_PACKET_SIGNING
586/* server->sign_wanted = 0; */
587/* server->sign_active = 0; */
588#endif
2e54eb96 589 init_rwsem(&server->auth_rwsem);
1da177e4
LT		 590 server->auth.auth_type = NCP_AUTH_NONE;
591/* server->auth.object_name_len = 0; */
592/* server->auth.object_name = NULL; */
593/* server->auth.object_type = 0; */
594/* server->priv.len = 0; */
595/* server->priv.data = NULL; */
596
597 server->m = data;
25985edc 598 /* Although anything producing this is buggy, it happens
1da177e4
LT		 599 now because of PATH_MAX changes.. */
600 if (server->m.time_out < 1) {
601 server->m.time_out = 10;
b41f8b84 602 pr_info("You need to recompile your ncpfs utils..\n");
1da177e4
LT		 603 }
604 server->m.time_out = server->m.time_out * HZ / 100;
605 server->m.file_mode = (server->m.file_mode & S_IRWXUGO) | S_IFREG;
606 server->m.dir_mode = (server->m.dir_mode & S_IRWXUGO) | S_IFDIR;
607
608#ifdef CONFIG_NCPFS_NLS
609 /* load the default NLS charsets */
610 server->nls_vol = load_nls_default();
611 server->nls_io = load_nls_default();
612#endif /* CONFIG_NCPFS_NLS */
613
2e54eb96 614 atomic_set(&server->dentry_ttl, 0); /* no caching */
1da177e4
LT		 615
616 INIT_LIST_HEAD(&server->tx.requests);
8e3f9045 617 mutex_init(&server->rcv.creq_mutex);
1da177e4
LT		 618 server->tx.creq = NULL;
619 server->rcv.creq = NULL;
1da177e4
LT		 620
621 init_timer(&server->timeout_tm);
622#undef NCP_PACKET_SIZE
623#define NCP_PACKET_SIZE 131072
624 error = -ENOMEM;
625 server->packet_size = NCP_PACKET_SIZE;
626 server->packet = vmalloc(NCP_PACKET_SIZE);
627 if (server->packet == NULL)
628 goto out_nls;
c5f93cf1
PO		 629 server->txbuf = vmalloc(NCP_PACKET_SIZE);
630 if (server->txbuf == NULL)
631 goto out_packet;
632 server->rxbuf = vmalloc(NCP_PACKET_SIZE);
633 if (server->rxbuf == NULL)
634 goto out_txbuf;
1da177e4 635
2a4df5d3
PV		 636 lock_sock(sock->sk);
637 server->data_ready = sock->sk->sk_data_ready;
638 server->write_space = sock->sk->sk_write_space;
639 server->error_report = sock->sk->sk_error_report;
640 sock->sk->sk_user_data = server;
1da177e4
LT		 641 sock->sk->sk_data_ready = ncp_tcp_data_ready;
642 sock->sk->sk_error_report = ncp_tcp_error_report;
643 if (sock->type == SOCK_STREAM) {
644 server->rcv.ptr = (unsigned char*)&server->rcv.buf;
645 server->rcv.len = 10;
646 server->rcv.state = 0;
c4028958
DH		 647 INIT_WORK(&server->rcv.tq, ncp_tcp_rcv_proc);
648 INIT_WORK(&server->tx.tq, ncp_tcp_tx_proc);
1da177e4
LT		 649 sock->sk->sk_write_space = ncp_tcp_write_space;
650 } else {
c4028958
DH		 651 INIT_WORK(&server->rcv.tq, ncpdgram_rcv_proc);
652 INIT_WORK(&server->timeout_tq, ncpdgram_timeout_proc);
1da177e4
LT		 653 server->timeout_tm.data = (unsigned long)server;
654 server->timeout_tm.function = ncpdgram_timeout_call;
655 }
2a4df5d3 656 release_sock(sock->sk);
1da177e4
LT		 657
658 ncp_lock_server(server);
659 error = ncp_connect(server);
660 ncp_unlock_server(server);
661 if (error < 0)
c5f93cf1 662 goto out_rxbuf;
15a03ac6 663 ncp_dbg(1, "NCP_SBP(sb) = %p\n", NCP_SBP(sb));
1da177e4
LT		 664
665 error = -EMSGSIZE; /* -EREMOTESIDEINCOMPATIBLE */
666#ifdef CONFIG_NCPFS_PACKET_SIGNING
667 if (ncp_negotiate_size_and_options(server, default_bufsize,
668 NCP_DEFAULT_OPTIONS, &(server->buffer_size), &options) == 0)
669 {
670 if (options != NCP_DEFAULT_OPTIONS)
671 {
672 if (ncp_negotiate_size_and_options(server,
673 default_bufsize,
674 options & 2,
675 &(server->buffer_size), &options) != 0)
676
677 {
678 goto out_disconnect;
679 }
680 }
2e54eb96 681 ncp_lock_server(server);
1da177e4
LT		 682 if (options & 2)
683 server->sign_wanted = 1;
2e54eb96 684 ncp_unlock_server(server);
1da177e4
LT		 685 }
686 else
687#endif /* CONFIG_NCPFS_PACKET_SIGNING */
688 if (ncp_negotiate_buffersize(server, default_bufsize,
689 &(server->buffer_size)) != 0)
690 goto out_disconnect;
d3b73ca1 691 ncp_dbg(1, "bufsize = %d\n", server->buffer_size);
1da177e4
LT		 692
693 memset(&finfo, 0, sizeof(finfo));
694 finfo.i.attributes = aDIR;
695 finfo.i.dataStreamSize = 0; /* ignored */
696 finfo.i.dirEntNum = 0;
697 finfo.i.DosDirNum = 0;
698#ifdef CONFIG_NCPFS_SMALLDOS
699 finfo.i.NSCreator = NW_NS_DOS;
700#endif
701 finfo.volume = NCP_NUMBER_OF_VOLUMES;
702 /* set dates of mountpoint to Jan 1, 1986; 00:00 */
703 finfo.i.creationTime = finfo.i.modifyTime
704 = cpu_to_le16(0x0000);
705 finfo.i.creationDate = finfo.i.modifyDate
706 = finfo.i.lastAccessDate
707 = cpu_to_le16(0x0C21);
708 finfo.i.nameLen = 0;
709 finfo.i.entryName[0] = '\0';
710
711 finfo.opened = 0;
712 finfo.ino = 2; /* tradition */
713
714 server->name_space[finfo.volume] = NW_NS_DOS;
715
716 error = -ENOMEM;
717 root_inode = ncp_iget(sb, &finfo);
718 if (!root_inode)
719 goto out_disconnect;
d3b73ca1 720 ncp_dbg(1, "root vol=%d\n", NCP_FINFO(root_inode)->volNumber);
48fde701 721 sb->s_root = d_make_root(root_inode);
1da177e4 722 if (!sb->s_root)
48fde701 723 goto out_disconnect;
1da177e4
LT		 724 return 0;
725
1da177e4
LT		 726out_disconnect:
727 ncp_lock_server(server);
728 ncp_disconnect(server);
729 ncp_unlock_server(server);
c5f93cf1 730out_rxbuf:
1da177e4 731 ncp_stop_tasks(server);
c5f93cf1
PO		 732 vfree(server->rxbuf);
733out_txbuf:
734 vfree(server->txbuf);
735out_packet:
1da177e4
LT		 736 vfree(server->packet);
737out_nls:
738#ifdef CONFIG_NCPFS_NLS
739 unload_nls(server->nls_io);
740 unload_nls(server->nls_vol);
741#endif
2e54eb96
PV		 742 mutex_destroy(&server->rcv.creq_mutex);
743 mutex_destroy(&server->root_setup_lock);
744 mutex_destroy(&server->mutex);
1da177e4 745out_fput2:
44ba8406
AV		 746 if (server->info_sock)
747 sockfd_put(server->info_sock);
f1970c73 748out_bdi:
759c361e
DH		 749 bdi_destroy(&server->bdi);
750out_fput:
44ba8406 751 sockfd_put(sock);
1da177e4 752out:
1de24126 753 put_pid(data.wdog_pid);
1da177e4
LT		 754 sb->s_fs_info = NULL;
755 kfree(server);
756 return error;
757}
758
1dcddd4a
AV		 759static void delayed_free(struct rcu_head *p)
760{
761 struct ncp_server *server = container_of(p, struct ncp_server, rcu);
762#ifdef CONFIG_NCPFS_NLS
763 /* unload the NLS charsets */
764 unload_nls(server->nls_vol);
765 unload_nls(server->nls_io);
766#endif /* CONFIG_NCPFS_NLS */
767 kfree(server);
768}
769
1da177e4
LT		 770static void ncp_put_super(struct super_block *sb)
771{
772 struct ncp_server *server = NCP_SBP(sb);
773
774 ncp_lock_server(server);
775 ncp_disconnect(server);
776 ncp_unlock_server(server);
777
778 ncp_stop_tasks(server);
779
2e54eb96
PV		 780 mutex_destroy(&server->rcv.creq_mutex);
781 mutex_destroy(&server->root_setup_lock);
782 mutex_destroy(&server->mutex);
1da177e4 783
44ba8406
AV		 784 if (server->info_sock)
785 sockfd_put(server->info_sock);
786 sockfd_put(server->ncp_sock);
2154227a
EB		 787 kill_pid(server->m.wdog_pid, SIGTERM, 1);
788 put_pid(server->m.wdog_pid);
1da177e4 789
f1970c73 790 bdi_destroy(&server->bdi);
44db77f3
PE		 791 kfree(server->priv.data);
792 kfree(server->auth.object_name);
c5f93cf1
PO		 793 vfree(server->rxbuf);
794 vfree(server->txbuf);
1da177e4 795 vfree(server->packet);
1dcddd4a 796 call_rcu(&server->rcu, delayed_free);
1da177e4
LT		 797}
798
726c3342 799static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4
LT		 800{
801 struct dentry* d;
802 struct inode* i;
803 struct ncp_inode_info* ni;
804 struct ncp_server* s;
805 struct ncp_volume_info vi;
726c3342 806 struct super_block *sb = dentry->d_sb;
1da177e4
LT		 807 int err;
808 __u8 dh;
809
810 d = sb->s_root;
811 if (!d) {
812 goto dflt;
813 }
2b0143b5 814 i = d_inode(d);
1da177e4
LT		 815 if (!i) {
816 goto dflt;
817 }
818 ni = NCP_FINFO(i);
819 if (!ni) {
820 goto dflt;
821 }
822 s = NCP_SBP(sb);
823 if (!s) {
824 goto dflt;
825 }
826 if (!s->m.mounted_vol[0]) {
827 goto dflt;
828 }
829
830 err = ncp_dirhandle_alloc(s, ni->volNumber, ni->DosDirNum, &dh);
831 if (err) {
832 goto dflt;
833 }
834 err = ncp_get_directory_info(s, dh, &vi);
835 ncp_dirhandle_free(s, dh);
836 if (err) {
837 goto dflt;
838 }
839 buf->f_type = NCP_SUPER_MAGIC;
840 buf->f_bsize = vi.sectors_per_block * 512;
841 buf->f_blocks = vi.total_blocks;
842 buf->f_bfree = vi.free_blocks;
843 buf->f_bavail = vi.free_blocks;
844 buf->f_files = vi.total_dir_entries;
845 buf->f_ffree = vi.available_dir_entries;
846 buf->f_namelen = 12;
847 return 0;
848
849 /* We cannot say how much disk space is left on a mounted
850 NetWare Server, because free space is distributed over
851 volumes, and the current user might have disk quotas. So
852 free space is not that simple to determine. Our decision
853 here is to err conservatively. */
854
855dflt:;
856 buf->f_type = NCP_SUPER_MAGIC;
857 buf->f_bsize = NCP_BLOCK_SIZE;
858 buf->f_blocks = 0;
859 buf->f_bfree = 0;
860 buf->f_bavail = 0;
861 buf->f_namelen = 12;
862 return 0;
863}
864
865int ncp_notify_change(struct dentry *dentry, struct iattr *attr)
866{
2b0143b5 867 struct inode *inode = d_inode(dentry);
1da177e4
LT		 868 int result = 0;
869 __le32 info_mask;
870 struct nw_modify_dos_info info;
871 struct ncp_server *server;
872
873 result = -EIO;
874
1da177e4 875 server = NCP_SERVER(inode);
2e54eb96 876 if (!server) /* How this could happen? */
1da177e4
LT		 877 goto out;
878
338b2f57 879 result = -EPERM;
2b0143b5 880 if (IS_DEADDIR(d_inode(dentry)))
338b2f57
AV		 881 goto out;
882
1da177e4
LT		 883 /* ageing the dentry to force validation */
884 ncp_age_dentry(server, dentry);
885
31051c85 886 result = setattr_prepare(dentry, attr);
1da177e4
LT		 887 if (result < 0)
888 goto out;
889
890 result = -EPERM;
1ac7fd81 891 if ((attr->ia_valid & ATTR_UID) && !uid_eq(attr->ia_uid, server->m.uid))
1da177e4
LT		 892 goto out;
893
1ac7fd81 894 if ((attr->ia_valid & ATTR_GID) && !gid_eq(attr->ia_gid, server->m.gid))
1da177e4
LT		 895 goto out;
896
897 if (((attr->ia_valid & ATTR_MODE) &&
898 (attr->ia_mode &
899 ~(S_IFREG | S_IFDIR | S_IRWXUGO))))
900 goto out;
901
902 info_mask = 0;
903 memset(&info, 0, sizeof(info));
904
905#if 1
906 if ((attr->ia_valid & ATTR_MODE) != 0)
907 {
908 umode_t newmode = attr->ia_mode;
909
910 info_mask |= DM_ATTRIBUTES;
911
912 if (S_ISDIR(inode->i_mode)) {
913 newmode &= server->m.dir_mode;
914 } else {
915#ifdef CONFIG_NCPFS_EXTRAS
916 if (server->m.flags & NCP_MOUNT_EXTRAS) {
917 /* any non-default execute bit set */
918 if (newmode & ~server->m.file_mode & S_IXUGO)
919 info.attributes |= aSHARED | aSYSTEM;
920 /* read for group/world and not in default file_mode */
921 else if (newmode & ~server->m.file_mode & S_IRUGO)
922 info.attributes |= aSHARED;
923 } else
924#endif
925 newmode &= server->m.file_mode;
926 }
927 if (newmode & S_IWUGO)
928 info.attributes &= ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
929 else
930 info.attributes |= (aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
931
932#ifdef CONFIG_NCPFS_NFS_NS
933 if (ncp_is_nfs_extras(server, NCP_FINFO(inode)->volNumber)) {
934 result = ncp_modify_nfs_info(server,
935 NCP_FINFO(inode)->volNumber,
936 NCP_FINFO(inode)->dirEntNum,
937 attr->ia_mode, 0);
938 if (result != 0)
939 goto out;
940 info.attributes &= ~(aSHARED | aSYSTEM);
941 {
942 /* mark partial success */
943 struct iattr tmpattr;
944
945 tmpattr.ia_valid = ATTR_MODE;
946 tmpattr.ia_mode = attr->ia_mode;
947
1025774c
CH		 948 setattr_copy(inode, &tmpattr);
949 mark_inode_dirty(inode);
1da177e4
LT		 950 }
951 }
952#endif
953 }
954#endif
955
956 /* Do SIZE before attributes, otherwise mtime together with size does not work...
957 */
958 if ((attr->ia_valid & ATTR_SIZE) != 0) {
959 int written;
960
15a03ac6 961 ncp_dbg(1, "trying to change size to %llu\n", attr->ia_size);
1da177e4
LT		 962
963 if ((result = ncp_make_open(inode, O_WRONLY)) < 0) {
964 result = -EACCES;
965 goto out;
966 }
967 ncp_write_kernel(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle,
968 attr->ia_size, 0, "", &written);
969
970 /* According to ndir, the changes only take effect after
971 closing the file */
972 ncp_inode_close(inode);
973 result = ncp_make_closed(inode);
974 if (result)
975 goto out;
1025774c
CH		 976
977 if (attr->ia_size != i_size_read(inode)) {
3e7a8069 978 truncate_setsize(inode, attr->ia_size);
1025774c 979 mark_inode_dirty(inode);
1da177e4
LT		 980 }
981 }
982 if ((attr->ia_valid & ATTR_CTIME) != 0) {
983 info_mask |= (DM_CREATE_TIME | DM_CREATE_DATE);
984 ncp_date_unix2dos(attr->ia_ctime.tv_sec,
985 &info.creationTime, &info.creationDate);
986 }
987 if ((attr->ia_valid & ATTR_MTIME) != 0) {
988 info_mask |= (DM_MODIFY_TIME | DM_MODIFY_DATE);
989 ncp_date_unix2dos(attr->ia_mtime.tv_sec,
990 &info.modifyTime, &info.modifyDate);
991 }
992 if ((attr->ia_valid & ATTR_ATIME) != 0) {
993 __le16 dummy;
994 info_mask |= (DM_LAST_ACCESS_DATE);
995 ncp_date_unix2dos(attr->ia_atime.tv_sec,
996 &dummy, &info.lastAccessDate);
997 }
998 if (info_mask != 0) {
999 result = ncp_modify_file_or_subdir_dos_info(NCP_SERVER(inode),
1000 inode, info_mask, &info);
1001 if (result != 0) {
1da177e4
LT		 1002 if (info_mask == (DM_CREATE_TIME | DM_CREATE_DATE)) {
1003 /* NetWare seems not to allow this. I
1004 do not know why. So, just tell the
1005 user everything went fine. This is
1006 a terrible hack, but I do not know
1007 how to do this correctly. */
1008 result = 0;
1009 } else
1010 goto out;
1011 }
1012#ifdef CONFIG_NCPFS_STRONG
1013 if ((!result) && (info_mask & DM_ATTRIBUTES))
1014 NCP_FINFO(inode)->nwattr = info.attributes;
1015#endif
1016 }
1025774c
CH		 1017 if (result)
1018 goto out;
1019
1020 setattr_copy(inode, attr);
1021 mark_inode_dirty(inode);
1022
1da177e4 1023out:
2e54eb96
PV		 1024 if (result > 0)
1025 result = -EACCES;
1da177e4
LT		 1026 return result;
1027}
1028
3c26ff6e
AV		 1029static struct dentry *ncp_mount(struct file_system_type *fs_type,
1030 int flags, const char *dev_name, void *data)
1da177e4 1031{
3c26ff6e 1032 return mount_nodev(fs_type, flags, data, ncp_fill_super);
1da177e4
LT		 1033}
1034
1035static struct file_system_type ncp_fs_type = {
1036 .owner = THIS_MODULE,
1037 .name = "ncpfs",
3c26ff6e 1038 .mount = ncp_mount,
1da177e4 1039 .kill_sb = kill_anon_super,
564cd138 1040 .fs_flags = FS_BINARY_MOUNTDATA,
1da177e4 1041};
7f78e035 1042MODULE_ALIAS_FS("ncpfs");
1da177e4
LT		 1043
1044static int __init init_ncp_fs(void)
1045{
1046 int err;
d3b73ca1 1047 ncp_dbg(1, "called\n");
1da177e4 1048
1da177e4
LT		 1049 err = init_inodecache();
1050 if (err)
1051 goto out1;
1052 err = register_filesystem(&ncp_fs_type);
1053 if (err)
1054 goto out;
1055 return 0;
1056out:
1057 destroy_inodecache();
1058out1:
1059 return err;
1060}
1061
1062static void __exit exit_ncp_fs(void)
1063{
d3b73ca1 1064 ncp_dbg(1, "called\n");
1da177e4
LT		 1065 unregister_filesystem(&ncp_fs_type);
1066 destroy_inodecache();
1da177e4
LT		 1067}
1068
1069module_init(init_ncp_fs)
1070module_exit(exit_ncp_fs)
1071MODULE_LICENSE("GPL");
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