1 /*
2 * inode.c
3 *
4 * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
5 * Copyright (C) 1997 by Volker Lendecke
6 *
7 * Please add a note about your changes to smbfs in the ChangeLog file.
8 */
9
10 #include <linux/config.h>
11 #include <linux/module.h>
12 #include <linux/sched.h>
13 #include <linux/kernel.h>
14 #include <linux/mm.h>
15 #include <linux/string.h>
16 #include <linux/stat.h>
17 #include <linux/errno.h>
18 #include <linux/locks.h>
19 #include <linux/slab.h>
20 #include <linux/init.h>
21 #include <linux/file.h>
22 #include <linux/dcache.h>
23 #include <linux/smp_lock.h>
24 #include <linux/nls.h>
25 #include <linux/seq_file.h>
26
27 #include <linux/smb_fs.h>
28 #include <linux/smbno.h>
29 #include <linux/smb_mount.h>
30
31 #include <asm/system.h>
32 #include <asm/uaccess.h>
33
34 #include "smb_debug.h"
35 #include "getopt.h"
36 #include "proto.h"
37
38 /* Always pick a default string */
39 #ifdef CONFIG_SMB_NLS_REMOTE
40 #define SMB_NLS_REMOTE CONFIG_SMB_NLS_REMOTE
41 #else
42 #define SMB_NLS_REMOTE ""
43 #endif
44
45 #define SMB_TTL_DEFAULT 1000
46 #define SMB_TIMEO_DEFAULT 30
47
48 static void smb_delete_inode(struct inode *);
49 static void smb_put_super(struct super_block *);
50 static int smb_statfs(struct super_block *, struct statfs *);
51 static int smb_show_options(struct seq_file *, struct vfsmount *);
52
53 static struct super_operations smb_sops =
54 {
55 put_inode: force_delete,
56 delete_inode: smb_delete_inode,
57 put_super: smb_put_super,
58 statfs: smb_statfs,
59 show_options: smb_show_options,
60 };
61
62
63 /* We are always generating a new inode here */
64 struct inode *
smb_iget(struct super_block * sb,struct smb_fattr * fattr)65 smb_iget(struct super_block *sb, struct smb_fattr *fattr)
66 {
67 struct inode *result;
68
69 DEBUG1("smb_iget: %p\n", fattr);
70
71 result = new_inode(sb);
72 if (!result)
73 return result;
74 result->i_ino = fattr->f_ino;
75 memset(&(result->u.smbfs_i), 0, sizeof(result->u.smbfs_i));
76 smb_set_inode_attr(result, fattr);
77 if (S_ISREG(result->i_mode)) {
78 result->i_op = &smb_file_inode_operations;
79 result->i_fop = &smb_file_operations;
80 result->i_data.a_ops = &smb_file_aops;
81 } else if (S_ISDIR(result->i_mode)) {
82 struct smb_sb_info *server = &(sb->u.smbfs_sb);
83 if (server->opt.capabilities & SMB_CAP_UNIX)
84 result->i_op = &smb_dir_inode_operations_unix;
85 else
86 result->i_op = &smb_dir_inode_operations;
87 result->i_fop = &smb_dir_operations;
88 } else if(S_ISLNK(result->i_mode)) {
89 result->i_op = &smb_link_inode_operations;
90 } else {
91 init_special_inode(result, result->i_mode, fattr->f_rdev);
92 }
93 insert_inode_hash(result);
94 return result;
95 }
96
97 /*
98 * Copy the inode data to a smb_fattr structure.
99 */
100 void
smb_get_inode_attr(struct inode * inode,struct smb_fattr * fattr)101 smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr)
102 {
103 memset(fattr, 0, sizeof(struct smb_fattr));
104 fattr->f_mode = inode->i_mode;
105 fattr->f_nlink = inode->i_nlink;
106 fattr->f_ino = inode->i_ino;
107 fattr->f_uid = inode->i_uid;
108 fattr->f_gid = inode->i_gid;
109 fattr->f_rdev = inode->i_rdev;
110 fattr->f_size = inode->i_size;
111 fattr->f_mtime = inode->i_mtime;
112 fattr->f_ctime = inode->i_ctime;
113 fattr->f_atime = inode->i_atime;
114 fattr->f_blksize= inode->i_blksize;
115 fattr->f_blocks = inode->i_blocks;
116
117 fattr->attr = inode->u.smbfs_i.attr;
118 /*
119 * Keep the attributes in sync with the inode permissions.
120 */
121 if (fattr->f_mode & S_IWUSR)
122 fattr->attr &= ~aRONLY;
123 else
124 fattr->attr |= aRONLY;
125 }
126
127 /*
128 * Update the inode, possibly causing it to invalidate its pages if mtime/size
129 * is different from last time.
130 */
131 void
smb_set_inode_attr(struct inode * inode,struct smb_fattr * fattr)132 smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr)
133 {
134 /*
135 * A size change should have a different mtime, or same mtime
136 * but different size.
137 */
138 time_t last_time = inode->i_mtime;
139 loff_t last_sz = inode->i_size;
140
141 inode->i_mode = fattr->f_mode;
142 inode->i_nlink = fattr->f_nlink;
143 inode->i_uid = fattr->f_uid;
144 inode->i_gid = fattr->f_gid;
145 inode->i_rdev = fattr->f_rdev;
146 inode->i_ctime = fattr->f_ctime;
147 inode->i_blksize= fattr->f_blksize;
148 inode->i_blocks = fattr->f_blocks;
149 inode->i_size = fattr->f_size;
150 inode->i_mtime = fattr->f_mtime;
151 inode->i_atime = fattr->f_atime;
152 inode->u.smbfs_i.attr = fattr->attr;
153 /*
154 * Update the "last time refreshed" field for revalidation.
155 */
156 inode->u.smbfs_i.oldmtime = jiffies;
157
158 if (inode->i_mtime != last_time || inode->i_size != last_sz) {
159 VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n",
160 inode->i_ino,
161 (long) last_time, (long) inode->i_mtime,
162 (long) last_sz, (long) inode->i_size);
163
164 if (!S_ISDIR(inode->i_mode))
165 invalidate_inode_pages(inode);
166 }
167 }
168
169 /*
170 * This is called if the connection has gone bad ...
171 * try to kill off all the current inodes.
172 */
173 void
smb_invalidate_inodes(struct smb_sb_info * server)174 smb_invalidate_inodes(struct smb_sb_info *server)
175 {
176 VERBOSE("\n");
177 shrink_dcache_sb(SB_of(server));
178 invalidate_inodes(SB_of(server));
179 }
180
181 /*
182 * This is called to update the inode attributes after
183 * we've made changes to a file or directory.
184 */
185 static int
smb_refresh_inode(struct dentry * dentry)186 smb_refresh_inode(struct dentry *dentry)
187 {
188 struct inode *inode = dentry->d_inode;
189 int error;
190 struct smb_fattr fattr;
191
192 error = smb_proc_getattr(dentry, &fattr);
193 if (!error) {
194 smb_renew_times(dentry);
195 /*
196 * Check whether the type part of the mode changed,
197 * and don't update the attributes if it did.
198 *
199 * And don't dick with the root inode
200 */
201 if (inode->i_ino == 2)
202 return error;
203 if (S_ISLNK(inode->i_mode))
204 return error; /* VFS will deal with it */
205
206 if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) {
207 smb_set_inode_attr(inode, &fattr);
208 } else {
209 /*
210 * Big trouble! The inode has become a new object,
211 * so any operations attempted on it are invalid.
212 *
213 * To limit damage, mark the inode as bad so that
214 * subsequent lookup validations will fail.
215 */
216 PARANOIA("%s/%s changed mode, %07o to %07o\n",
217 DENTRY_PATH(dentry),
218 inode->i_mode, fattr.f_mode);
219
220 fattr.f_mode = inode->i_mode; /* save mode */
221 make_bad_inode(inode);
222 inode->i_mode = fattr.f_mode; /* restore mode */
223 /*
224 * No need to worry about unhashing the dentry: the
225 * lookup validation will see that the inode is bad.
226 * But we do want to invalidate the caches ...
227 */
228 if (!S_ISDIR(inode->i_mode))
229 invalidate_inode_pages(inode);
230 else
231 smb_invalid_dir_cache(inode);
232 error = -EIO;
233 }
234 }
235 return error;
236 }
237
238 /*
239 * This is called when we want to check whether the inode
240 * has changed on the server. If it has changed, we must
241 * invalidate our local caches.
242 */
243 int
smb_revalidate_inode(struct dentry * dentry)244 smb_revalidate_inode(struct dentry *dentry)
245 {
246 struct smb_sb_info *s = server_from_dentry(dentry);
247 struct inode *inode = dentry->d_inode;
248 int error = 0;
249
250 DEBUG1("smb_revalidate_inode\n");
251 lock_kernel();
252
253 /*
254 * Check whether we've recently refreshed the inode.
255 */
256 if (time_before(jiffies, inode->u.smbfs_i.oldmtime + SMB_MAX_AGE(s))) {
257 VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n",
258 inode->i_ino, jiffies, inode->u.smbfs_i.oldmtime);
259 goto out;
260 }
261
262 error = smb_refresh_inode(dentry);
263 out:
264 unlock_kernel();
265 return error;
266 }
267
268 /*
269 * This routine is called when i_nlink == 0 and i_count goes to 0.
270 * All blocking cleanup operations need to go here to avoid races.
271 */
272 static void
smb_delete_inode(struct inode * ino)273 smb_delete_inode(struct inode *ino)
274 {
275 DEBUG1("ino=%ld\n", ino->i_ino);
276 lock_kernel();
277 if (smb_close(ino))
278 PARANOIA("could not close inode %ld\n", ino->i_ino);
279 unlock_kernel();
280 clear_inode(ino);
281 }
282
283 static struct option opts[] = {
284 { "version", 0, 'v' },
285 { "win95", SMB_MOUNT_WIN95, 1 },
286 { "oldattr", SMB_MOUNT_OLDATTR, 1 },
287 { "dirattr", SMB_MOUNT_DIRATTR, 1 },
288 { "case", SMB_MOUNT_CASE, 1 },
289 { "uid", 0, 'u' },
290 { "gid", 0, 'g' },
291 { "file_mode", 0, 'f' },
292 { "dir_mode", 0, 'd' },
293 { "iocharset", 0, 'i' },
294 { "codepage", 0, 'c' },
295 { "ttl", 0, 't' },
296 { "timeo", 0, 'o' },
297 { NULL, 0, 0}
298 };
299
300 static int
parse_options(struct smb_mount_data_kernel * mnt,char * options)301 parse_options(struct smb_mount_data_kernel *mnt, char *options)
302 {
303 int c;
304 unsigned long flags;
305 unsigned long value;
306 char *optarg;
307 char *optopt;
308
309 flags = 0;
310 while ( (c = smb_getopt("smbfs", &options, opts,
311 &optopt, &optarg, &flags, &value)) > 0) {
312
313 VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>");
314 switch (c) {
315 case 1:
316 /* got a "flag" option */
317 break;
318 case 'v':
319 if (value != SMB_MOUNT_VERSION) {
320 printk ("smbfs: Bad mount version %ld, expected %d\n",
321 value, SMB_MOUNT_VERSION);
322 return 0;
323 }
324 mnt->version = value;
325 break;
326 case 'u':
327 mnt->uid = value;
328 flags |= SMB_MOUNT_UID;
329 break;
330 case 'g':
331 mnt->gid = value;
332 flags |= SMB_MOUNT_GID;
333 break;
334 case 'f':
335 mnt->file_mode = (value & S_IRWXUGO) | S_IFREG;
336 flags |= SMB_MOUNT_FMODE;
337 break;
338 case 'd':
339 mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR;
340 flags |= SMB_MOUNT_DMODE;
341 break;
342 case 'i':
343 strncpy(mnt->codepage.local_name, optarg,
344 SMB_NLS_MAXNAMELEN);
345 break;
346 case 'c':
347 strncpy(mnt->codepage.remote_name, optarg,
348 SMB_NLS_MAXNAMELEN);
349 break;
350 case 't':
351 mnt->ttl = value;
352 break;
353 case 'o':
354 mnt->timeo = value;
355 break;
356 default:
357 printk ("smbfs: Unrecognized mount option %s\n",
358 optopt);
359 return -1;
360 }
361 }
362 mnt->flags = flags;
363 return c;
364 }
365
366 /*
367 * smb_show_options() is for displaying mount options in /proc/mounts.
368 * It tries to avoid showing settings that were not changed from their
369 * defaults.
370 */
371 static int
smb_show_options(struct seq_file * s,struct vfsmount * m)372 smb_show_options(struct seq_file *s, struct vfsmount *m)
373 {
374 struct smb_mount_data_kernel *mnt = m->mnt_sb->u.smbfs_sb.mnt;
375 int i;
376
377 for (i = 0; opts[i].name != NULL; i++)
378 if (mnt->flags & opts[i].flag)
379 seq_printf(s, ",%s", opts[i].name);
380
381 if (mnt->flags & SMB_MOUNT_UID)
382 seq_printf(s, ",uid=%d", mnt->uid);
383 if (mnt->flags & SMB_MOUNT_GID)
384 seq_printf(s, ",gid=%d", mnt->gid);
385 if (mnt->mounted_uid != 0)
386 seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid);
387
388 /*
389 * Defaults for file_mode and dir_mode are unknown to us; they
390 * depend on the current umask of the user doing the mount.
391 */
392 if (mnt->flags & SMB_MOUNT_FMODE)
393 seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO);
394 if (mnt->flags & SMB_MOUNT_DMODE)
395 seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO);
396
397 if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT))
398 seq_printf(s, ",iocharset=%s", mnt->codepage.local_name);
399 if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE))
400 seq_printf(s, ",codepage=%s", mnt->codepage.remote_name);
401
402 if (mnt->ttl != SMB_TTL_DEFAULT)
403 seq_printf(s, ",ttl=%d", mnt->ttl);
404 if (mnt->timeo != SMB_TIMEO_DEFAULT)
405 seq_printf(s, ",timeo=%d", mnt->timeo);
406
407 return 0;
408 }
409
410 static void
smb_put_super(struct super_block * sb)411 smb_put_super(struct super_block *sb)
412 {
413 struct smb_sb_info *server = &(sb->u.smbfs_sb);
414
415 if (server->sock_file) {
416 smb_dont_catch_keepalive(server);
417 fput(server->sock_file);
418 }
419
420 if (server->conn_pid)
421 kill_proc(server->conn_pid, SIGTERM, 1);
422
423 smb_kfree(server->mnt);
424 smb_kfree(server->temp_buf);
425 if (server->packet)
426 smb_vfree(server->packet);
427
428 if (server->remote_nls) {
429 unload_nls(server->remote_nls);
430 server->remote_nls = NULL;
431 }
432 if (server->local_nls) {
433 unload_nls(server->local_nls);
434 server->local_nls = NULL;
435 }
436 }
437
438 struct super_block *
smb_read_super(struct super_block * sb,void * raw_data,int silent)439 smb_read_super(struct super_block *sb, void *raw_data, int silent)
440 {
441 struct smb_sb_info *server = &sb->u.smbfs_sb;
442 struct smb_mount_data_kernel *mnt;
443 struct smb_mount_data *oldmnt;
444 struct inode *root_inode;
445 struct smb_fattr root;
446 int ver;
447 void *mem;
448
449 if (!raw_data)
450 goto out_no_data;
451
452 oldmnt = (struct smb_mount_data *) raw_data;
453 ver = oldmnt->version;
454 if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII)
455 goto out_wrong_data;
456
457 sb->s_blocksize = 1024; /* Eh... Is this correct? */
458 sb->s_blocksize_bits = 10;
459 sb->s_maxbytes = MAX_NON_LFS;
460 sb->s_magic = SMB_SUPER_MAGIC;
461 sb->s_op = &smb_sops;
462
463 server->mnt = NULL;
464 server->sock_file = NULL;
465 init_MUTEX(&server->sem);
466 init_waitqueue_head(&server->wait);
467 server->conn_pid = 0;
468 server->state = CONN_INVALID; /* no connection yet */
469 server->generation = 0;
470 server->packet_size = smb_round_length(SMB_INITIAL_PACKET_SIZE);
471 server->packet = smb_vmalloc(server->packet_size);
472 if (!server->packet)
473 goto out_no_mem;
474
475 /* Allocate the global temp buffer */
476 server->temp_buf = smb_kmalloc(2*SMB_MAXPATHLEN+20, GFP_KERNEL);
477 if (!server->temp_buf)
478 goto out_no_temp;
479
480 /* Setup NLS stuff */
481 server->remote_nls = NULL;
482 server->local_nls = NULL;
483 server->name_buf = server->temp_buf + SMB_MAXPATHLEN + 20;
484
485 /* Allocate the mount data structure */
486 /* FIXME: merge this with the other malloc and get a whole page? */
487 mem = smb_kmalloc(sizeof(struct smb_ops) +
488 sizeof(struct smb_mount_data_kernel), GFP_KERNEL);
489 if (!mem)
490 goto out_no_mount;
491 server->mnt = mnt = mem;
492 server->ops = mem + sizeof(struct smb_mount_data_kernel);
493 smb_install_null_ops(server->ops);
494
495 memset(mnt, 0, sizeof(struct smb_mount_data_kernel));
496 strncpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT,
497 SMB_NLS_MAXNAMELEN);
498 strncpy(mnt->codepage.remote_name, SMB_NLS_REMOTE,
499 SMB_NLS_MAXNAMELEN);
500
501 mnt->ttl = SMB_TTL_DEFAULT;
502 mnt->timeo = SMB_TIMEO_DEFAULT;
503 if (ver == SMB_MOUNT_OLDVERSION) {
504 mnt->version = oldmnt->version;
505
506 /* FIXME: is this enough to convert uid/gid's ? */
507 mnt->uid = oldmnt->uid;
508 mnt->gid = oldmnt->gid;
509
510 mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
511 mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;
512
513 mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID |
514 SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE;
515 } else {
516 mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP |
517 S_IROTH | S_IXOTH | S_IFREG;
518 mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP |
519 S_IROTH | S_IXOTH | S_IFDIR;
520 if (parse_options(mnt, raw_data))
521 goto out_bad_option;
522 }
523 smb_setcodepage(server, &mnt->codepage);
524 mnt->mounted_uid = current->uid;
525
526 /*
527 * Display the enabled options
528 * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2)
529 */
530 if (mnt->flags & SMB_MOUNT_OLDATTR)
531 printk("SMBFS: Using core getattr (Win 95 speedup)\n");
532 else if (mnt->flags & SMB_MOUNT_DIRATTR)
533 printk("SMBFS: Using dir ff getattr\n");
534
535 /*
536 * Keep the super block locked while we get the root inode.
537 */
538 smb_init_root_dirent(server, &root);
539 root_inode = smb_iget(sb, &root);
540 if (!root_inode)
541 goto out_no_root;
542
543 sb->s_root = d_alloc_root(root_inode);
544 if (!sb->s_root)
545 goto out_no_root;
546
547 smb_new_dentry(sb->s_root);
548
549 return sb;
550
551 out_no_root:
552 iput(root_inode);
553 out_bad_option:
554 smb_kfree(server->mnt);
555 out_no_mount:
556 smb_kfree(server->temp_buf);
557 out_no_temp:
558 smb_vfree(server->packet);
559 out_no_mem:
560 if (!server->mnt)
561 printk(KERN_ERR "smb_read_super: allocation failure\n");
562 goto out_fail;
563 out_wrong_data:
564 printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver);
565 goto out_fail;
566 out_no_data:
567 printk(KERN_ERR "smb_read_super: missing data argument\n");
568 out_fail:
569 return NULL;
570 }
571
572 static int
smb_statfs(struct super_block * sb,struct statfs * buf)573 smb_statfs(struct super_block *sb, struct statfs *buf)
574 {
575 int result = smb_proc_dskattr(sb, buf);
576
577 buf->f_type = SMB_SUPER_MAGIC;
578 buf->f_namelen = SMB_MAXPATHLEN;
579 return result;
580 }
581
582 int
smb_notify_change(struct dentry * dentry,struct iattr * attr)583 smb_notify_change(struct dentry *dentry, struct iattr *attr)
584 {
585 struct inode *inode = dentry->d_inode;
586 struct smb_sb_info *server = server_from_dentry(dentry);
587 unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO);
588 int error, changed, refresh = 0;
589 struct smb_fattr fattr;
590
591 error = smb_revalidate_inode(dentry);
592 if (error)
593 goto out;
594
595 if ((error = inode_change_ok(inode, attr)) < 0)
596 goto out;
597
598 error = -EPERM;
599 if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid))
600 goto out;
601
602 if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid))
603 goto out;
604
605 if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask))
606 goto out;
607
608 if ((attr->ia_valid & ATTR_SIZE) != 0) {
609 VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n",
610 DENTRY_PATH(dentry),
611 (long) inode->i_size, (long) attr->ia_size);
612
613 filemap_fdatasync(inode->i_mapping);
614 filemap_fdatawait(inode->i_mapping);
615
616 error = smb_open(dentry, O_WRONLY);
617 if (error)
618 goto out;
619 error = server->ops->truncate(inode, attr->ia_size);
620 if (error)
621 goto out;
622 error = vmtruncate(inode, attr->ia_size);
623 if (error)
624 goto out;
625 refresh = 1;
626 }
627
628 if (server->opt.capabilities & SMB_CAP_UNIX) {
629 /* For now we don't want to set the size with setattr_unix */
630 attr->ia_valid &= ~ATTR_SIZE;
631 /* FIXME: only call if we actually want to set something? */
632 error = smb_proc_setattr_unix(dentry, attr, 0, 0);
633 if (!error)
634 refresh = 1;
635 goto out;
636 }
637
638 /*
639 * Initialize the fattr and check for changed fields.
640 * Note: CTIME under SMB is creation time rather than
641 * change time, so we don't attempt to change it.
642 */
643 smb_get_inode_attr(inode, &fattr);
644
645 changed = 0;
646 if ((attr->ia_valid & ATTR_MTIME) != 0) {
647 fattr.f_mtime = attr->ia_mtime;
648 changed = 1;
649 }
650 if ((attr->ia_valid & ATTR_ATIME) != 0) {
651 fattr.f_atime = attr->ia_atime;
652 /* Earlier protocols don't have an access time */
653 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2)
654 changed = 1;
655 }
656 if (changed) {
657 error = smb_proc_settime(dentry, &fattr);
658 if (error)
659 goto out;
660 refresh = 1;
661 }
662
663 /*
664 * Check for mode changes ... we're extremely limited in
665 * what can be set for SMB servers: just the read-only bit.
666 */
667 if ((attr->ia_valid & ATTR_MODE) != 0) {
668 VERBOSE("%s/%s mode change, old=%x, new=%x\n",
669 DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode);
670 changed = 0;
671 if (attr->ia_mode & S_IWUSR) {
672 if (fattr.attr & aRONLY) {
673 fattr.attr &= ~aRONLY;
674 changed = 1;
675 }
676 } else {
677 if (!(fattr.attr & aRONLY)) {
678 fattr.attr |= aRONLY;
679 changed = 1;
680 }
681 }
682 if (changed) {
683 error = smb_proc_setattr(dentry, &fattr);
684 if (error)
685 goto out;
686 refresh = 1;
687 }
688 }
689 error = 0;
690
691 out:
692 if (refresh)
693 smb_refresh_inode(dentry);
694 return error;
695 }
696
697 #ifdef DEBUG_SMB_MALLOC
698 int smb_malloced;
699 int smb_current_kmalloced;
700 int smb_current_vmalloced;
701 #endif
702
703 static DECLARE_FSTYPE( smb_fs_type, "smbfs", smb_read_super, 0);
704
init_smb_fs(void)705 static int __init init_smb_fs(void)
706 {
707 DEBUG1("registering ...\n");
708
709 #ifdef DEBUG_SMB_MALLOC
710 smb_malloced = 0;
711 smb_current_kmalloced = 0;
712 smb_current_vmalloced = 0;
713 #endif
714
715 return register_filesystem(&smb_fs_type);
716 }
717
exit_smb_fs(void)718 static void __exit exit_smb_fs(void)
719 {
720 DEBUG1("unregistering ...\n");
721 unregister_filesystem(&smb_fs_type);
722 #ifdef DEBUG_SMB_MALLOC
723 printk(KERN_DEBUG "smb_malloced: %d\n", smb_malloced);
724 printk(KERN_DEBUG "smb_current_kmalloced: %d\n",smb_current_kmalloced);
725 printk(KERN_DEBUG "smb_current_vmalloced: %d\n",smb_current_vmalloced);
726 #endif
727 }
728
729 EXPORT_NO_SYMBOLS;
730
731 module_init(init_smb_fs)
732 module_exit(exit_smb_fs)
733 MODULE_LICENSE("GPL");
734