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[PATCH] Really ignore kmem_cache_destroy return value
[deliverable/linux.git] / fs / smbfs / inode.c
CommitLineData
1da177e4
LT		 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
1da177e4
LT		 10#include <linux/module.h>
11#include <linux/time.h>
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/string.h>
15#include <linux/stat.h>
16#include <linux/errno.h>
17#include <linux/slab.h>
18#include <linux/init.h>
19#include <linux/file.h>
20#include <linux/dcache.h>
21#include <linux/smp_lock.h>
22#include <linux/nls.h>
23#include <linux/seq_file.h>
24#include <linux/mount.h>
25#include <linux/net.h>
26#include <linux/vfs.h>
27#include <linux/highuid.h>
28#include <linux/smb_fs.h>
29#include <linux/smbno.h>
30#include <linux/smb_mount.h>
31
32#include <asm/system.h>
33#include <asm/uaccess.h>
34
35#include "smb_debug.h"
36#include "getopt.h"
37#include "proto.h"
38
39/* Always pick a default string */
40#ifdef CONFIG_SMB_NLS_REMOTE
41#define SMB_NLS_REMOTE CONFIG_SMB_NLS_REMOTE
42#else
43#define SMB_NLS_REMOTE ""
44#endif
45
46#define SMB_TTL_DEFAULT 1000
47
48static void smb_delete_inode(struct inode *);
49static void smb_put_super(struct super_block *);
726c3342 50static int smb_statfs(struct dentry *, struct kstatfs *);
1da177e4
LT		 51static int smb_show_options(struct seq_file *, struct vfsmount *);
52
53static kmem_cache_t *smb_inode_cachep;
54
55static struct inode *smb_alloc_inode(struct super_block *sb)
56{
57 struct smb_inode_info *ei;
58 ei = (struct smb_inode_info *)kmem_cache_alloc(smb_inode_cachep, SLAB_KERNEL);
59 if (!ei)
60 return NULL;
61 return &ei->vfs_inode;
62}
63
64static void smb_destroy_inode(struct inode *inode)
65{
66 kmem_cache_free(smb_inode_cachep, SMB_I(inode));
67}
68
69static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
70{
71 struct smb_inode_info *ei = (struct smb_inode_info *) foo;
72 unsigned long flagmask = SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR;
73
74 if ((flags & flagmask) == SLAB_CTOR_CONSTRUCTOR)
75 inode_init_once(&ei->vfs_inode);
76}
77
78static int init_inodecache(void)
79{
80 smb_inode_cachep = kmem_cache_create("smb_inode_cache",
81 sizeof(struct smb_inode_info),
fffb60f9
PJ		 82 0, (SLAB_RECLAIM_ACCOUNT|
83 SLAB_MEM_SPREAD),
1da177e4
LT		 84 init_once, NULL);
85 if (smb_inode_cachep == NULL)
86 return -ENOMEM;
87 return 0;
88}
89
90static void destroy_inodecache(void)
91{
1a1d92c1 92 kmem_cache_destroy(smb_inode_cachep);
1da177e4
LT		 93}
94
95static int smb_remount(struct super_block *sb, int *flags, char *data)
96{
97 *flags |= MS_NODIRATIME;
98 return 0;
99}
100
101static struct super_operations smb_sops =
102{
103 .alloc_inode = smb_alloc_inode,
104 .destroy_inode = smb_destroy_inode,
105 .drop_inode = generic_delete_inode,
106 .delete_inode = smb_delete_inode,
107 .put_super = smb_put_super,
108 .statfs = smb_statfs,
109 .show_options = smb_show_options,
110 .remount_fs = smb_remount,
111};
112
113
114/* We are always generating a new inode here */
115struct inode *
116smb_iget(struct super_block *sb, struct smb_fattr *fattr)
117{
118 struct smb_sb_info *server = SMB_SB(sb);
119 struct inode *result;
120
121 DEBUG1("smb_iget: %p\n", fattr);
122
123 result = new_inode(sb);
124 if (!result)
125 return result;
126 result->i_ino = fattr->f_ino;
127 SMB_I(result)->open = 0;
128 SMB_I(result)->fileid = 0;
129 SMB_I(result)->access = 0;
130 SMB_I(result)->flags = 0;
131 SMB_I(result)->closed = 0;
132 SMB_I(result)->openers = 0;
133 smb_set_inode_attr(result, fattr);
134 if (S_ISREG(result->i_mode)) {
135 result->i_op = &smb_file_inode_operations;
136 result->i_fop = &smb_file_operations;
137 result->i_data.a_ops = &smb_file_aops;
138 } else if (S_ISDIR(result->i_mode)) {
139 if (server->opt.capabilities & SMB_CAP_UNIX)
140 result->i_op = &smb_dir_inode_operations_unix;
141 else
142 result->i_op = &smb_dir_inode_operations;
143 result->i_fop = &smb_dir_operations;
144 } else if (S_ISLNK(result->i_mode)) {
145 result->i_op = &smb_link_inode_operations;
146 } else {
147 init_special_inode(result, result->i_mode, fattr->f_rdev);
148 }
149 insert_inode_hash(result);
150 return result;
151}
152
153/*
154 * Copy the inode data to a smb_fattr structure.
155 */
156void
157smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr)
158{
159 memset(fattr, 0, sizeof(struct smb_fattr));
160 fattr->f_mode = inode->i_mode;
161 fattr->f_nlink = inode->i_nlink;
162 fattr->f_ino = inode->i_ino;
163 fattr->f_uid = inode->i_uid;
164 fattr->f_gid = inode->i_gid;
165 fattr->f_size = inode->i_size;
166 fattr->f_mtime = inode->i_mtime;
167 fattr->f_ctime = inode->i_ctime;
168 fattr->f_atime = inode->i_atime;
169 fattr->f_blksize= inode->i_blksize;
170 fattr->f_blocks = inode->i_blocks;
171
172 fattr->attr = SMB_I(inode)->attr;
173 /*
174 * Keep the attributes in sync with the inode permissions.
175 */
176 if (fattr->f_mode & S_IWUSR)
177 fattr->attr &= ~aRONLY;
178 else
179 fattr->attr |= aRONLY;
180}
181
182/*
183 * Update the inode, possibly causing it to invalidate its pages if mtime/size
184 * is different from last time.
185 */
186void
187smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr)
188{
189 struct smb_inode_info *ei = SMB_I(inode);
190
191 /*
192 * A size change should have a different mtime, or same mtime
193 * but different size.
194 */
195 time_t last_time = inode->i_mtime.tv_sec;
196 loff_t last_sz = inode->i_size;
197
198 inode->i_mode = fattr->f_mode;
199 inode->i_nlink = fattr->f_nlink;
200 inode->i_uid = fattr->f_uid;
201 inode->i_gid = fattr->f_gid;
202 inode->i_ctime = fattr->f_ctime;
203 inode->i_blksize= fattr->f_blksize;
204 inode->i_blocks = fattr->f_blocks;
205 inode->i_size = fattr->f_size;
206 inode->i_mtime = fattr->f_mtime;
207 inode->i_atime = fattr->f_atime;
208 ei->attr = fattr->attr;
209
210 /*
211 * Update the "last time refreshed" field for revalidation.
212 */
213 ei->oldmtime = jiffies;
214
215 if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) {
216 VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n",
217 inode->i_ino,
58bf6a2d 218 (long) last_time, (long) inode->i_mtime.tv_sec,
1da177e4
LT		 219 (long) last_sz, (long) inode->i_size);
220
221 if (!S_ISDIR(inode->i_mode))
222 invalidate_remote_inode(inode);
223 }
224}
225
226/*
227 * This is called if the connection has gone bad ...
228 * try to kill off all the current inodes.
229 */
230void
231smb_invalidate_inodes(struct smb_sb_info *server)
232{
233 VERBOSE("\n");
234 shrink_dcache_sb(SB_of(server));
235 invalidate_inodes(SB_of(server));
236}
237
238/*
239 * This is called to update the inode attributes after
240 * we've made changes to a file or directory.
241 */
242static int
243smb_refresh_inode(struct dentry *dentry)
244{
245 struct inode *inode = dentry->d_inode;
246 int error;
247 struct smb_fattr fattr;
248
249 error = smb_proc_getattr(dentry, &fattr);
250 if (!error) {
251 smb_renew_times(dentry);
252 /*
253 * Check whether the type part of the mode changed,
254 * and don't update the attributes if it did.
255 *
256 * And don't dick with the root inode
257 */
258 if (inode->i_ino == 2)
259 return error;
260 if (S_ISLNK(inode->i_mode))
261 return error; /* VFS will deal with it */
262
263 if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) {
264 smb_set_inode_attr(inode, &fattr);
265 } else {
266 /*
267 * Big trouble! The inode has become a new object,
268 * so any operations attempted on it are invalid.
269 *
270 * To limit damage, mark the inode as bad so that
271 * subsequent lookup validations will fail.
272 */
273 PARANOIA("%s/%s changed mode, %07o to %07o\n",
274 DENTRY_PATH(dentry),
275 inode->i_mode, fattr.f_mode);
276
277 fattr.f_mode = inode->i_mode; /* save mode */
278 make_bad_inode(inode);
279 inode->i_mode = fattr.f_mode; /* restore mode */
280 /*
281 * No need to worry about unhashing the dentry: the
282 * lookup validation will see that the inode is bad.
283 * But we do want to invalidate the caches ...
284 */
285 if (!S_ISDIR(inode->i_mode))
286 invalidate_remote_inode(inode);
287 else
288 smb_invalid_dir_cache(inode);
289 error = -EIO;
290 }
291 }
292 return error;
293}
294
295/*
296 * This is called when we want to check whether the inode
297 * has changed on the server. If it has changed, we must
298 * invalidate our local caches.
299 */
300int
301smb_revalidate_inode(struct dentry *dentry)
302{
303 struct smb_sb_info *s = server_from_dentry(dentry);
304 struct inode *inode = dentry->d_inode;
305 int error = 0;
306
307 DEBUG1("smb_revalidate_inode\n");
308 lock_kernel();
309
310 /*
311 * Check whether we've recently refreshed the inode.
312 */
313 if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) {
314 VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n",
315 inode->i_ino, jiffies, SMB_I(inode)->oldmtime);
316 goto out;
317 }
318
319 error = smb_refresh_inode(dentry);
320out:
321 unlock_kernel();
322 return error;
323}
324
325/*
326 * This routine is called when i_nlink == 0 and i_count goes to 0.
327 * All blocking cleanup operations need to go here to avoid races.
328 */
329static void
330smb_delete_inode(struct inode *ino)
331{
332 DEBUG1("ino=%ld\n", ino->i_ino);
fef26658 333 truncate_inode_pages(&ino->i_data, 0);
1da177e4
LT		 334 lock_kernel();
335 if (smb_close(ino))
336 PARANOIA("could not close inode %ld\n", ino->i_ino);
337 unlock_kernel();
338 clear_inode(ino);
339}
340
341static struct option opts[] = {
342 { "version", 0, 'v' },
343 { "win95", SMB_MOUNT_WIN95, 1 },
344 { "oldattr", SMB_MOUNT_OLDATTR, 1 },
345 { "dirattr", SMB_MOUNT_DIRATTR, 1 },
346 { "case", SMB_MOUNT_CASE, 1 },
347 { "uid", 0, 'u' },
348 { "gid", 0, 'g' },
349 { "file_mode", 0, 'f' },
350 { "dir_mode", 0, 'd' },
351 { "iocharset", 0, 'i' },
352 { "codepage", 0, 'c' },
353 { "ttl", 0, 't' },
354 { NULL, 0, 0}
355};
356
357static int
358parse_options(struct smb_mount_data_kernel *mnt, char *options)
359{
360 int c;
361 unsigned long flags;
362 unsigned long value;
363 char *optarg;
364 char *optopt;
365
366 flags = 0;
367 while ( (c = smb_getopt("smbfs", &options, opts,
368 &optopt, &optarg, &flags, &value)) > 0) {
369
370 VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>");
371 switch (c) {
372 case 1:
373 /* got a "flag" option */
374 break;
375 case 'v':
376 if (value != SMB_MOUNT_VERSION) {
377 printk ("smbfs: Bad mount version %ld, expected %d\n",
378 value, SMB_MOUNT_VERSION);
379 return 0;
380 }
381 mnt->version = value;
382 break;
383 case 'u':
384 mnt->uid = value;
385 flags |= SMB_MOUNT_UID;
386 break;
387 case 'g':
388 mnt->gid = value;
389 flags |= SMB_MOUNT_GID;
390 break;
391 case 'f':
392 mnt->file_mode = (value & S_IRWXUGO) | S_IFREG;
393 flags |= SMB_MOUNT_FMODE;
394 break;
395 case 'd':
396 mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR;
397 flags |= SMB_MOUNT_DMODE;
398 break;
399 case 'i':
400 strlcpy(mnt->codepage.local_name, optarg,
401 SMB_NLS_MAXNAMELEN);
402 break;
403 case 'c':
404 strlcpy(mnt->codepage.remote_name, optarg,
405 SMB_NLS_MAXNAMELEN);
406 break;
407 case 't':
408 mnt->ttl = value;
409 break;
410 default:
411 printk ("smbfs: Unrecognized mount option %s\n",
412 optopt);
413 return -1;
414 }
415 }
416 mnt->flags = flags;
417 return c;
418}
419
420/*
421 * smb_show_options() is for displaying mount options in /proc/mounts.
422 * It tries to avoid showing settings that were not changed from their
423 * defaults.
424 */
425static int
426smb_show_options(struct seq_file *s, struct vfsmount *m)
427{
428 struct smb_mount_data_kernel *mnt = SMB_SB(m->mnt_sb)->mnt;
429 int i;
430
431 for (i = 0; opts[i].name != NULL; i++)
432 if (mnt->flags & opts[i].flag)
433 seq_printf(s, ",%s", opts[i].name);
434
435 if (mnt->flags & SMB_MOUNT_UID)
436 seq_printf(s, ",uid=%d", mnt->uid);
437 if (mnt->flags & SMB_MOUNT_GID)
438 seq_printf(s, ",gid=%d", mnt->gid);
439 if (mnt->mounted_uid != 0)
440 seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid);
441
442 /*
443 * Defaults for file_mode and dir_mode are unknown to us; they
444 * depend on the current umask of the user doing the mount.
445 */
446 if (mnt->flags & SMB_MOUNT_FMODE)
447 seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO);
448 if (mnt->flags & SMB_MOUNT_DMODE)
449 seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO);
450
451 if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT))
452 seq_printf(s, ",iocharset=%s", mnt->codepage.local_name);
453 if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE))
454 seq_printf(s, ",codepage=%s", mnt->codepage.remote_name);
455
456 if (mnt->ttl != SMB_TTL_DEFAULT)
457 seq_printf(s, ",ttl=%d", mnt->ttl);
458
459 return 0;
460}
461
462static void
463smb_unload_nls(struct smb_sb_info *server)
464{
465 if (server->remote_nls) {
466 unload_nls(server->remote_nls);
467 server->remote_nls = NULL;
468 }
469 if (server->local_nls) {
470 unload_nls(server->local_nls);
471 server->local_nls = NULL;
472 }
473}
474
475static void
476smb_put_super(struct super_block *sb)
477{
478 struct smb_sb_info *server = SMB_SB(sb);
479
480 smb_lock_server(server);
481 server->state = CONN_INVALID;
482 smbiod_unregister_server(server);
483
484 smb_close_socket(server);
485
486 if (server->conn_pid)
487 kill_proc(server->conn_pid, SIGTERM, 1);
488
d063389e 489 kfree(server->ops);
1da177e4
LT		 490 smb_unload_nls(server);
491 sb->s_fs_info = NULL;
492 smb_unlock_server(server);
d063389e 493 kfree(server);
1da177e4
LT		 494}
495
496static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
497{
498 struct smb_sb_info *server;
499 struct smb_mount_data_kernel *mnt;
500 struct smb_mount_data *oldmnt;
501 struct inode *root_inode;
502 struct smb_fattr root;
503 int ver;
504 void *mem;
505
506 if (!raw_data)
507 goto out_no_data;
508
509 oldmnt = (struct smb_mount_data *) raw_data;
510 ver = oldmnt->version;
511 if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII)
512 goto out_wrong_data;
513
514 sb->s_flags |= MS_NODIRATIME;
515 sb->s_blocksize = 1024; /* Eh... Is this correct? */
516 sb->s_blocksize_bits = 10;
517 sb->s_magic = SMB_SUPER_MAGIC;
518 sb->s_op = &smb_sops;
519 sb->s_time_gran = 100;
520
d063389e 521 server = kzalloc(sizeof(struct smb_sb_info), GFP_KERNEL);
1da177e4
LT		 522 if (!server)
523 goto out_no_server;
524 sb->s_fs_info = server;
1da177e4
LT		 525
526 server->super_block = sb;
527 server->mnt = NULL;
528 server->sock_file = NULL;
529 init_waitqueue_head(&server->conn_wq);
530 init_MUTEX(&server->sem);
531 INIT_LIST_HEAD(&server->entry);
532 INIT_LIST_HEAD(&server->xmitq);
533 INIT_LIST_HEAD(&server->recvq);
534 server->conn_error = 0;
535 server->conn_pid = 0;
536 server->state = CONN_INVALID; /* no connection yet */
537 server->generation = 0;
538
539 /* Allocate the global temp buffer and some superblock helper structs */
540 /* FIXME: move these to the smb_sb_info struct */
541 VERBOSE("alloc chunk = %d\n", sizeof(struct smb_ops) +
542 sizeof(struct smb_mount_data_kernel));
d063389e
PE		 543 mem = kmalloc(sizeof(struct smb_ops) +
544 sizeof(struct smb_mount_data_kernel), GFP_KERNEL);
1da177e4
LT		 545 if (!mem)
546 goto out_no_mem;
547
548 server->ops = mem;
549 smb_install_null_ops(server->ops);
550 server->mnt = mem + sizeof(struct smb_ops);
551
552 /* Setup NLS stuff */
553 server->remote_nls = NULL;
554 server->local_nls = NULL;
555
556 mnt = server->mnt;
557
558 memset(mnt, 0, sizeof(struct smb_mount_data_kernel));
559 strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT,
560 SMB_NLS_MAXNAMELEN);
561 strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE,
562 SMB_NLS_MAXNAMELEN);
563
564 mnt->ttl = SMB_TTL_DEFAULT;
565 if (ver == SMB_MOUNT_OLDVERSION) {
566 mnt->version = oldmnt->version;
567
568 SET_UID(mnt->uid, oldmnt->uid);
569 SET_GID(mnt->gid, oldmnt->gid);
570
571 mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
572 mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;
573
574 mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID |
575 SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE;
576 } else {
577 mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP |
578 S_IROTH | S_IXOTH | S_IFREG;
579 mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP |
580 S_IROTH | S_IXOTH | S_IFDIR;
581 if (parse_options(mnt, raw_data))
582 goto out_bad_option;
583 }
584 mnt->mounted_uid = current->uid;
585 smb_setcodepage(server, &mnt->codepage);
586
587 /*
588 * Display the enabled options
589 * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2)
590 */
591 if (mnt->flags & SMB_MOUNT_OLDATTR)
592 printk("SMBFS: Using core getattr (Win 95 speedup)\n");
593 else if (mnt->flags & SMB_MOUNT_DIRATTR)
594 printk("SMBFS: Using dir ff getattr\n");
595
596 if (smbiod_register_server(server) < 0) {
597 printk(KERN_ERR "smbfs: failed to start smbiod\n");
598 goto out_no_smbiod;
599 }
600
601 /*
602 * Keep the super block locked while we get the root inode.
603 */
604 smb_init_root_dirent(server, &root, sb);
605 root_inode = smb_iget(sb, &root);
606 if (!root_inode)
607 goto out_no_root;
608
609 sb->s_root = d_alloc_root(root_inode);
610 if (!sb->s_root)
611 goto out_no_root;
612
613 smb_new_dentry(sb->s_root);
614
615 return 0;
616
617out_no_root:
618 iput(root_inode);
619out_no_smbiod:
620 smb_unload_nls(server);
621out_bad_option:
d063389e 622 kfree(mem);
1da177e4
LT		 623out_no_mem:
624 if (!server->mnt)
625 printk(KERN_ERR "smb_fill_super: allocation failure\n");
626 sb->s_fs_info = NULL;
d063389e 627 kfree(server);
1da177e4
LT		 628 goto out_fail;
629out_wrong_data:
630 printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver);
631 goto out_fail;
632out_no_data:
633 printk(KERN_ERR "smb_fill_super: missing data argument\n");
634out_fail:
635 return -EINVAL;
636out_no_server:
637 printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
638 return -ENOMEM;
639}
640
641static int
726c3342 642smb_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4
LT		 643{
644 int result;
645
646 lock_kernel();
647
726c3342 648 result = smb_proc_dskattr(dentry, buf);
1da177e4
LT		 649
650 unlock_kernel();
651
652 buf->f_type = SMB_SUPER_MAGIC;
653 buf->f_namelen = SMB_MAXPATHLEN;
654 return result;
655}
656
657int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
658{
659 int err = smb_revalidate_inode(dentry);
660 if (!err)
661 generic_fillattr(dentry->d_inode, stat);
662 return err;
663}
664
665int
666smb_notify_change(struct dentry *dentry, struct iattr *attr)
667{
668 struct inode *inode = dentry->d_inode;
669 struct smb_sb_info *server = server_from_dentry(dentry);
670 unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO);
671 int error, changed, refresh = 0;
672 struct smb_fattr fattr;
673
674 lock_kernel();
675
676 error = smb_revalidate_inode(dentry);
677 if (error)
678 goto out;
679
680 if ((error = inode_change_ok(inode, attr)) < 0)
681 goto out;
682
683 error = -EPERM;
684 if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid))
685 goto out;
686
687 if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid))
688 goto out;
689
690 if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask))
691 goto out;
692
693 if ((attr->ia_valid & ATTR_SIZE) != 0) {
694 VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n",
695 DENTRY_PATH(dentry),
696 (long) inode->i_size, (long) attr->ia_size);
697
28fd1298 698 filemap_write_and_wait(inode->i_mapping);
1da177e4
LT		 699
700 error = smb_open(dentry, O_WRONLY);
701 if (error)
702 goto out;
703 error = server->ops->truncate(inode, attr->ia_size);
704 if (error)
705 goto out;
706 error = vmtruncate(inode, attr->ia_size);
707 if (error)
708 goto out;
709 refresh = 1;
710 }
711
712 if (server->opt.capabilities & SMB_CAP_UNIX) {
713 /* For now we don't want to set the size with setattr_unix */
714 attr->ia_valid &= ~ATTR_SIZE;
715 /* FIXME: only call if we actually want to set something? */
716 error = smb_proc_setattr_unix(dentry, attr, 0, 0);
717 if (!error)
718 refresh = 1;
719
720 goto out;
721 }
722
723 /*
724 * Initialize the fattr and check for changed fields.
725 * Note: CTIME under SMB is creation time rather than
726 * change time, so we don't attempt to change it.
727 */
728 smb_get_inode_attr(inode, &fattr);
729
730 changed = 0;
731 if ((attr->ia_valid & ATTR_MTIME) != 0) {
732 fattr.f_mtime = attr->ia_mtime;
733 changed = 1;
734 }
735 if ((attr->ia_valid & ATTR_ATIME) != 0) {
736 fattr.f_atime = attr->ia_atime;
737 /* Earlier protocols don't have an access time */
738 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2)
739 changed = 1;
740 }
741 if (changed) {
742 error = smb_proc_settime(dentry, &fattr);
743 if (error)
744 goto out;
745 refresh = 1;
746 }
747
748 /*
749 * Check for mode changes ... we're extremely limited in
750 * what can be set for SMB servers: just the read-only bit.
751 */
752 if ((attr->ia_valid & ATTR_MODE) != 0) {
753 VERBOSE("%s/%s mode change, old=%x, new=%x\n",
754 DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode);
755 changed = 0;
756 if (attr->ia_mode & S_IWUSR) {
757 if (fattr.attr & aRONLY) {
758 fattr.attr &= ~aRONLY;
759 changed = 1;
760 }
761 } else {
762 if (!(fattr.attr & aRONLY)) {
763 fattr.attr |= aRONLY;
764 changed = 1;
765 }
766 }
767 if (changed) {
768 error = smb_proc_setattr(dentry, &fattr);
769 if (error)
770 goto out;
771 refresh = 1;
772 }
773 }
774 error = 0;
775
776out:
777 if (refresh)
778 smb_refresh_inode(dentry);
779 unlock_kernel();
780 return error;
781}
782
454e2398
DH		 783static int smb_get_sb(struct file_system_type *fs_type,
784 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1da177e4 785{
454e2398 786 return get_sb_nodev(fs_type, flags, data, smb_fill_super, mnt);
1da177e4
LT		 787}
788
789static struct file_system_type smb_fs_type = {
790 .owner = THIS_MODULE,
791 .name = "smbfs",
792 .get_sb = smb_get_sb,
793 .kill_sb = kill_anon_super,
794 .fs_flags = FS_BINARY_MOUNTDATA,
795};
796
797static int __init init_smb_fs(void)
798{
799 int err;
800 DEBUG1("registering ...\n");
801
1da177e4
LT		 802 err = init_inodecache();
803 if (err)
804 goto out_inode;
805 err = smb_init_request_cache();
806 if (err)
807 goto out_request;
808 err = register_filesystem(&smb_fs_type);
809 if (err)
810 goto out;
811 return 0;
812out:
813 smb_destroy_request_cache();
814out_request:
815 destroy_inodecache();
816out_inode:
817 return err;
818}
819
820static void __exit exit_smb_fs(void)
821{
822 DEBUG1("unregistering ...\n");
823 unregister_filesystem(&smb_fs_type);
824 smb_destroy_request_cache();
825 destroy_inodecache();
1da177e4
LT		 826}
827
828module_init(init_smb_fs)
829module_exit(exit_smb_fs)
830MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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