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-rw-r--r--fs/smbfs/inode.c839
1 files changed, 0 insertions, 839 deletions
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
deleted file mode 100644
index 450c91941988..000000000000
--- a/fs/smbfs/inode.c
+++ /dev/null
@@ -1,839 +0,0 @@
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/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/sched.h>
29#include <linux/smb_fs.h>
30#include <linux/smbno.h>
31#include <linux/smb_mount.h>
32
33#include <asm/system.h>
34#include <asm/uaccess.h>
35
36#include "smb_debug.h"
37#include "getopt.h"
38#include "proto.h"
39
40/* Always pick a default string */
41#ifdef CONFIG_SMB_NLS_REMOTE
42#define SMB_NLS_REMOTE CONFIG_SMB_NLS_REMOTE
43#else
44#define SMB_NLS_REMOTE ""
45#endif
46
47#define SMB_TTL_DEFAULT 1000
48
49static void smb_evict_inode(struct inode *);
50static void smb_put_super(struct super_block *);
51static int smb_statfs(struct dentry *, struct kstatfs *);
52static int smb_show_options(struct seq_file *, struct vfsmount *);
53
54static struct kmem_cache *smb_inode_cachep;
55
56static struct inode *smb_alloc_inode(struct super_block *sb)
57{
58 struct smb_inode_info *ei;
59 ei = (struct smb_inode_info *)kmem_cache_alloc(smb_inode_cachep, GFP_KERNEL);
60 if (!ei)
61 return NULL;
62 return &ei->vfs_inode;
63}
64
65static void smb_destroy_inode(struct inode *inode)
66{
67 kmem_cache_free(smb_inode_cachep, SMB_I(inode));
68}
69
70static void init_once(void *foo)
71{
72 struct smb_inode_info *ei = (struct smb_inode_info *) foo;
73
74 inode_init_once(&ei->vfs_inode);
75}
76
77static int init_inodecache(void)
78{
79 smb_inode_cachep = kmem_cache_create("smb_inode_cache",
80 sizeof(struct smb_inode_info),
81 0, (SLAB_RECLAIM_ACCOUNT|
82 SLAB_MEM_SPREAD),
83 init_once);
84 if (smb_inode_cachep == NULL)
85 return -ENOMEM;
86 return 0;
87}
88
89static void destroy_inodecache(void)
90{
91 kmem_cache_destroy(smb_inode_cachep);
92}
93
94static int smb_remount(struct super_block *sb, int *flags, char *data)
95{
96 *flags |= MS_NODIRATIME;
97 return 0;
98}
99
100static const struct super_operations smb_sops =
101{
102 .alloc_inode = smb_alloc_inode,
103 .destroy_inode = smb_destroy_inode,
104 .drop_inode = generic_delete_inode,
105 .evict_inode = smb_evict_inode,
106 .put_super = smb_put_super,
107 .statfs = smb_statfs,
108 .show_options = smb_show_options,
109 .remount_fs = smb_remount,
110};
111
112
113/* We are always generating a new inode here */
114struct inode *
115smb_iget(struct super_block *sb, struct smb_fattr *fattr)
116{
117 struct smb_sb_info *server = SMB_SB(sb);
118 struct inode *result;
119
120 DEBUG1("smb_iget: %p\n", fattr);
121
122 result = new_inode(sb);
123 if (!result)
124 return result;
125 result->i_ino = fattr->f_ino;
126 SMB_I(result)->open = 0;
127 SMB_I(result)->fileid = 0;
128 SMB_I(result)->access = 0;
129 SMB_I(result)->flags = 0;
130 SMB_I(result)->closed = 0;
131 SMB_I(result)->openers = 0;
132 smb_set_inode_attr(result, fattr);
133 if (S_ISREG(result->i_mode)) {
134 result->i_op = &smb_file_inode_operations;
135 result->i_fop = &smb_file_operations;
136 result->i_data.a_ops = &smb_file_aops;
137 } else if (S_ISDIR(result->i_mode)) {
138 if (server->opt.capabilities & SMB_CAP_UNIX)
139 result->i_op = &smb_dir_inode_operations_unix;
140 else
141 result->i_op = &smb_dir_inode_operations;
142 result->i_fop = &smb_dir_operations;
143 } else if (S_ISLNK(result->i_mode)) {
144 result->i_op = &smb_link_inode_operations;
145 } else {
146 init_special_inode(result, result->i_mode, fattr->f_rdev);
147 }
148 insert_inode_hash(result);
149 return result;
150}
151
152/*
153 * Copy the inode data to a smb_fattr structure.
154 */
155void
156smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr)
157{
158 memset(fattr, 0, sizeof(struct smb_fattr));
159 fattr->f_mode = inode->i_mode;
160 fattr->f_nlink = inode->i_nlink;
161 fattr->f_ino = inode->i_ino;
162 fattr->f_uid = inode->i_uid;
163 fattr->f_gid = inode->i_gid;
164 fattr->f_size = inode->i_size;
165 fattr->f_mtime = inode->i_mtime;
166 fattr->f_ctime = inode->i_ctime;
167 fattr->f_atime = inode->i_atime;
168 fattr->f_blocks = inode->i_blocks;
169
170 fattr->attr = SMB_I(inode)->attr;
171 /*
172 * Keep the attributes in sync with the inode permissions.
173 */
174 if (fattr->f_mode & S_IWUSR)
175 fattr->attr &= ~aRONLY;
176 else
177 fattr->attr |= aRONLY;
178}
179
180/*
181 * Update the inode, possibly causing it to invalidate its pages if mtime/size
182 * is different from last time.
183 */
184void
185smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr)
186{
187 struct smb_inode_info *ei = SMB_I(inode);
188
189 /*
190 * A size change should have a different mtime, or same mtime
191 * but different size.
192 */
193 time_t last_time = inode->i_mtime.tv_sec;
194 loff_t last_sz = inode->i_size;
195
196 inode->i_mode = fattr->f_mode;
197 inode->i_nlink = fattr->f_nlink;
198 inode->i_uid = fattr->f_uid;
199 inode->i_gid = fattr->f_gid;
200 inode->i_ctime = fattr->f_ctime;
201 inode->i_blocks = fattr->f_blocks;
202 inode->i_size = fattr->f_size;
203 inode->i_mtime = fattr->f_mtime;
204 inode->i_atime = fattr->f_atime;
205 ei->attr = fattr->attr;
206
207 /*
208 * Update the "last time refreshed" field for revalidation.
209 */
210 ei->oldmtime = jiffies;
211
212 if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) {
213 VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n",
214 inode->i_ino,
215 (long) last_time, (long) inode->i_mtime.tv_sec,
216 (long) last_sz, (long) inode->i_size);
217
218 if (!S_ISDIR(inode->i_mode))
219 invalidate_remote_inode(inode);
220 }
221}
222
223/*
224 * This is called if the connection has gone bad ...
225 * try to kill off all the current inodes.
226 */
227void
228smb_invalidate_inodes(struct smb_sb_info *server)
229{
230 VERBOSE("\n");
231 shrink_dcache_sb(SB_of(server));
232 invalidate_inodes(SB_of(server));
233}
234
235/*
236 * This is called to update the inode attributes after
237 * we've made changes to a file or directory.
238 */
239static int
240smb_refresh_inode(struct dentry *dentry)
241{
242 struct inode *inode = dentry->d_inode;
243 int error;
244 struct smb_fattr fattr;
245
246 error = smb_proc_getattr(dentry, &fattr);
247 if (!error) {
248 smb_renew_times(dentry);
249 /*
250 * Check whether the type part of the mode changed,
251 * and don't update the attributes if it did.
252 *
253 * And don't dick with the root inode
254 */
255 if (inode->i_ino == 2)
256 return error;
257 if (S_ISLNK(inode->i_mode))
258 return error; /* VFS will deal with it */
259
260 if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) {
261 smb_set_inode_attr(inode, &fattr);
262 } else {
263 /*
264 * Big trouble! The inode has become a new object,
265 * so any operations attempted on it are invalid.
266 *
267 * To limit damage, mark the inode as bad so that
268 * subsequent lookup validations will fail.
269 */
270 PARANOIA("%s/%s changed mode, %07o to %07o\n",
271 DENTRY_PATH(dentry),
272 inode->i_mode, fattr.f_mode);
273
274 fattr.f_mode = inode->i_mode; /* save mode */
275 make_bad_inode(inode);
276 inode->i_mode = fattr.f_mode; /* restore mode */
277 /*
278 * No need to worry about unhashing the dentry: the
279 * lookup validation will see that the inode is bad.
280 * But we do want to invalidate the caches ...
281 */
282 if (!S_ISDIR(inode->i_mode))
283 invalidate_remote_inode(inode);
284 else
285 smb_invalid_dir_cache(inode);
286 error = -EIO;
287 }
288 }
289 return error;
290}
291
292/*
293 * This is called when we want to check whether the inode
294 * has changed on the server. If it has changed, we must
295 * invalidate our local caches.
296 */
297int
298smb_revalidate_inode(struct dentry *dentry)
299{
300 struct smb_sb_info *s = server_from_dentry(dentry);
301 struct inode *inode = dentry->d_inode;
302 int error = 0;
303
304 DEBUG1("smb_revalidate_inode\n");
305 lock_kernel();
306
307 /*
308 * Check whether we've recently refreshed the inode.
309 */
310 if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) {
311 VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n",
312 inode->i_ino, jiffies, SMB_I(inode)->oldmtime);
313 goto out;
314 }
315
316 error = smb_refresh_inode(dentry);
317out:
318 unlock_kernel();
319 return error;
320}
321
322/*
323 * This routine is called when i_nlink == 0 and i_count goes to 0.
324 * All blocking cleanup operations need to go here to avoid races.
325 */
326static void
327smb_evict_inode(struct inode *ino)
328{
329 DEBUG1("ino=%ld\n", ino->i_ino);
330 truncate_inode_pages(&ino->i_data, 0);
331 end_writeback(ino);
332 lock_kernel();
333 if (smb_close(ino))
334 PARANOIA("could not close inode %ld\n", ino->i_ino);
335 unlock_kernel();
336}
337
338static struct option opts[] = {
339 { "version", 0, 'v' },
340 { "win95", SMB_MOUNT_WIN95, 1 },
341 { "oldattr", SMB_MOUNT_OLDATTR, 1 },
342 { "dirattr", SMB_MOUNT_DIRATTR, 1 },
343 { "case", SMB_MOUNT_CASE, 1 },
344 { "uid", 0, 'u' },
345 { "gid", 0, 'g' },
346 { "file_mode", 0, 'f' },
347 { "dir_mode", 0, 'd' },
348 { "iocharset", 0, 'i' },
349 { "codepage", 0, 'c' },
350 { "ttl", 0, 't' },
351 { NULL, 0, 0}
352};
353
354static int
355parse_options(struct smb_mount_data_kernel *mnt, char *options)
356{
357 int c;
358 unsigned long flags;
359 unsigned long value;
360 char *optarg;
361 char *optopt;
362
363 flags = 0;
364 while ( (c = smb_getopt("smbfs", &options, opts,
365 &optopt, &optarg, &flags, &value)) > 0) {
366
367 VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>");
368 switch (c) {
369 case 1:
370 /* got a "flag" option */
371 break;
372 case 'v':
373 if (value != SMB_MOUNT_VERSION) {
374 printk ("smbfs: Bad mount version %ld, expected %d\n",
375 value, SMB_MOUNT_VERSION);
376 return 0;
377 }
378 mnt->version = value;
379 break;
380 case 'u':
381 mnt->uid = value;
382 flags |= SMB_MOUNT_UID;
383 break;
384 case 'g':
385 mnt->gid = value;
386 flags |= SMB_MOUNT_GID;
387 break;
388 case 'f':
389 mnt->file_mode = (value & S_IRWXUGO) | S_IFREG;
390 flags |= SMB_MOUNT_FMODE;
391 break;
392 case 'd':
393 mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR;
394 flags |= SMB_MOUNT_DMODE;
395 break;
396 case 'i':
397 strlcpy(mnt->codepage.local_name, optarg,
398 SMB_NLS_MAXNAMELEN);
399 break;
400 case 'c':
401 strlcpy(mnt->codepage.remote_name, optarg,
402 SMB_NLS_MAXNAMELEN);
403 break;
404 case 't':
405 mnt->ttl = value;
406 break;
407 default:
408 printk ("smbfs: Unrecognized mount option %s\n",
409 optopt);
410 return -1;
411 }
412 }
413 mnt->flags = flags;
414 return c;
415}
416
417/*
418 * smb_show_options() is for displaying mount options in /proc/mounts.
419 * It tries to avoid showing settings that were not changed from their
420 * defaults.
421 */
422static int
423smb_show_options(struct seq_file *s, struct vfsmount *m)
424{
425 struct smb_mount_data_kernel *mnt = SMB_SB(m->mnt_sb)->mnt;
426 int i;
427
428 for (i = 0; opts[i].name != NULL; i++)
429 if (mnt->flags & opts[i].flag)
430 seq_printf(s, ",%s", opts[i].name);
431
432 if (mnt->flags & SMB_MOUNT_UID)
433 seq_printf(s, ",uid=%d", mnt->uid);
434 if (mnt->flags & SMB_MOUNT_GID)
435 seq_printf(s, ",gid=%d", mnt->gid);
436 if (mnt->mounted_uid != 0)
437 seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid);
438
439 /*
440 * Defaults for file_mode and dir_mode are unknown to us; they
441 * depend on the current umask of the user doing the mount.
442 */
443 if (mnt->flags & SMB_MOUNT_FMODE)
444 seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO);
445 if (mnt->flags & SMB_MOUNT_DMODE)
446 seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO);
447
448 if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT))
449 seq_printf(s, ",iocharset=%s", mnt->codepage.local_name);
450 if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE))
451 seq_printf(s, ",codepage=%s", mnt->codepage.remote_name);
452
453 if (mnt->ttl != SMB_TTL_DEFAULT)
454 seq_printf(s, ",ttl=%d", mnt->ttl);
455
456 return 0;
457}
458
459static void
460smb_unload_nls(struct smb_sb_info *server)
461{
462 unload_nls(server->remote_nls);
463 unload_nls(server->local_nls);
464}
465
466static void
467smb_put_super(struct super_block *sb)
468{
469 struct smb_sb_info *server = SMB_SB(sb);
470
471 lock_kernel();
472
473 smb_lock_server(server);
474 server->state = CONN_INVALID;
475 smbiod_unregister_server(server);
476
477 smb_close_socket(server);
478
479 if (server->conn_pid)
480 kill_pid(server->conn_pid, SIGTERM, 1);
481
482 bdi_destroy(&server->bdi);
483 kfree(server->ops);
484 smb_unload_nls(server);
485 sb->s_fs_info = NULL;
486 smb_unlock_server(server);
487 put_pid(server->conn_pid);
488 kfree(server);
489
490 unlock_kernel();
491}
492
493static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
494{
495 struct smb_sb_info *server;
496 struct smb_mount_data_kernel *mnt;
497 struct smb_mount_data *oldmnt;
498 struct inode *root_inode;
499 struct smb_fattr root;
500 int ver;
501 void *mem;
502 static int warn_count;
503
504 if (warn_count < 5) {
505 warn_count++;
506 printk(KERN_EMERG "smbfs is deprecated and will be removed"
507 " from the 2.6.27 kernel. Please migrate to cifs\n");
508 }
509
510 if (!raw_data)
511 goto out_no_data;
512
513 oldmnt = (struct smb_mount_data *) raw_data;
514 ver = oldmnt->version;
515 if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII)
516 goto out_wrong_data;
517
518 sb->s_flags |= MS_NODIRATIME;
519 sb->s_blocksize = 1024; /* Eh... Is this correct? */
520 sb->s_blocksize_bits = 10;
521 sb->s_magic = SMB_SUPER_MAGIC;
522 sb->s_op = &smb_sops;
523 sb->s_time_gran = 100;
524
525 server = kzalloc(sizeof(struct smb_sb_info), GFP_KERNEL);
526 if (!server)
527 goto out_no_server;
528 sb->s_fs_info = server;
529
530 if (bdi_setup_and_register(&server->bdi, "smbfs", BDI_CAP_MAP_COPY))
531 goto out_bdi;
532
533 sb->s_bdi = &server->bdi;
534
535 server->super_block = sb;
536 server->mnt = NULL;
537 server->sock_file = NULL;
538 init_waitqueue_head(&server->conn_wq);
539 init_MUTEX(&server->sem);
540 INIT_LIST_HEAD(&server->entry);
541 INIT_LIST_HEAD(&server->xmitq);
542 INIT_LIST_HEAD(&server->recvq);
543 server->conn_error = 0;
544 server->conn_pid = NULL;
545 server->state = CONN_INVALID; /* no connection yet */
546 server->generation = 0;
547
548 /* Allocate the global temp buffer and some superblock helper structs */
549 /* FIXME: move these to the smb_sb_info struct */
550 VERBOSE("alloc chunk = %lu\n", sizeof(struct smb_ops) +
551 sizeof(struct smb_mount_data_kernel));
552 mem = kmalloc(sizeof(struct smb_ops) +
553 sizeof(struct smb_mount_data_kernel), GFP_KERNEL);
554 if (!mem)
555 goto out_no_mem;
556
557 server->ops = mem;
558 smb_install_null_ops(server->ops);
559 server->mnt = mem + sizeof(struct smb_ops);
560
561 /* Setup NLS stuff */
562 server->remote_nls = NULL;
563 server->local_nls = NULL;
564
565 mnt = server->mnt;
566
567 memset(mnt, 0, sizeof(struct smb_mount_data_kernel));
568 strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT,
569 SMB_NLS_MAXNAMELEN);
570 strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE,
571 SMB_NLS_MAXNAMELEN);
572
573 mnt->ttl = SMB_TTL_DEFAULT;
574 if (ver == SMB_MOUNT_OLDVERSION) {
575 mnt->version = oldmnt->version;
576
577 SET_UID(mnt->uid, oldmnt->uid);
578 SET_GID(mnt->gid, oldmnt->gid);
579
580 mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
581 mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;
582
583 mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID |
584 SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE;
585 } else {
586 mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP |
587 S_IROTH | S_IXOTH | S_IFREG;
588 mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP |
589 S_IROTH | S_IXOTH | S_IFDIR;
590 if (parse_options(mnt, raw_data))
591 goto out_bad_option;
592 }
593 mnt->mounted_uid = current_uid();
594 smb_setcodepage(server, &mnt->codepage);
595
596 /*
597 * Display the enabled options
598 * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2)
599 */
600 if (mnt->flags & SMB_MOUNT_OLDATTR)
601 printk("SMBFS: Using core getattr (Win 95 speedup)\n");
602 else if (mnt->flags & SMB_MOUNT_DIRATTR)
603 printk("SMBFS: Using dir ff getattr\n");
604
605 if (smbiod_register_server(server) < 0) {
606 printk(KERN_ERR "smbfs: failed to start smbiod\n");
607 goto out_no_smbiod;
608 }
609
610 /*
611 * Keep the super block locked while we get the root inode.
612 */
613 smb_init_root_dirent(server, &root, sb);
614 root_inode = smb_iget(sb, &root);
615 if (!root_inode)
616 goto out_no_root;
617
618 sb->s_root = d_alloc_root(root_inode);
619 if (!sb->s_root)
620 goto out_no_root;
621
622 smb_new_dentry(sb->s_root);
623
624 return 0;
625
626out_no_root:
627 iput(root_inode);
628out_no_smbiod:
629 smb_unload_nls(server);
630out_bad_option:
631 kfree(mem);
632out_no_mem:
633 bdi_destroy(&server->bdi);
634out_bdi:
635 if (!server->mnt)
636 printk(KERN_ERR "smb_fill_super: allocation failure\n");
637 sb->s_fs_info = NULL;
638 kfree(server);
639 goto out_fail;
640out_wrong_data:
641 printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver);
642 goto out_fail;
643out_no_data:
644 printk(KERN_ERR "smb_fill_super: missing data argument\n");
645out_fail:
646 return -EINVAL;
647out_no_server:
648 printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
649 return -ENOMEM;
650}
651
652static int
653smb_statfs(struct dentry *dentry, struct kstatfs *buf)
654{
655 int result;
656
657 lock_kernel();
658
659 result = smb_proc_dskattr(dentry, buf);
660
661 unlock_kernel();
662
663 buf->f_type = SMB_SUPER_MAGIC;
664 buf->f_namelen = SMB_MAXPATHLEN;
665 return result;
666}
667
668int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
669{
670 int err = smb_revalidate_inode(dentry);
671 if (!err)
672 generic_fillattr(dentry->d_inode, stat);
673 return err;
674}
675
676int
677smb_notify_change(struct dentry *dentry, struct iattr *attr)
678{
679 struct inode *inode = dentry->d_inode;
680 struct smb_sb_info *server = server_from_dentry(dentry);
681 unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO);
682 int error, changed, refresh = 0;
683 struct smb_fattr fattr;
684
685 lock_kernel();
686
687 error = smb_revalidate_inode(dentry);
688 if (error)
689 goto out;
690
691 if ((error = inode_change_ok(inode, attr)) < 0)
692 goto out;
693
694 error = -EPERM;
695 if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid))
696 goto out;
697
698 if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid))
699 goto out;
700
701 if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask))
702 goto out;
703
704 if ((attr->ia_valid & ATTR_SIZE) != 0) {
705 VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n",
706 DENTRY_PATH(dentry),
707 (long) inode->i_size, (long) attr->ia_size);
708
709 filemap_write_and_wait(inode->i_mapping);
710
711 error = smb_open(dentry, O_WRONLY);
712 if (error)
713 goto out;
714 error = server->ops->truncate(inode, attr->ia_size);
715 if (error)
716 goto out;
717 truncate_setsize(inode, attr->ia_size);
718 refresh = 1;
719 }
720
721 if (server->opt.capabilities & SMB_CAP_UNIX) {
722 /* For now we don't want to set the size with setattr_unix */
723 attr->ia_valid &= ~ATTR_SIZE;
724 /* FIXME: only call if we actually want to set something? */
725 error = smb_proc_setattr_unix(dentry, attr, 0, 0);
726 if (!error)
727 refresh = 1;
728
729 goto out;
730 }
731
732 /*
733 * Initialize the fattr and check for changed fields.
734 * Note: CTIME under SMB is creation time rather than
735 * change time, so we don't attempt to change it.
736 */
737 smb_get_inode_attr(inode, &fattr);
738
739 changed = 0;
740 if ((attr->ia_valid & ATTR_MTIME) != 0) {
741 fattr.f_mtime = attr->ia_mtime;
742 changed = 1;
743 }
744 if ((attr->ia_valid & ATTR_ATIME) != 0) {
745 fattr.f_atime = attr->ia_atime;
746 /* Earlier protocols don't have an access time */
747 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2)
748 changed = 1;
749 }
750 if (changed) {
751 error = smb_proc_settime(dentry, &fattr);
752 if (error)
753 goto out;
754 refresh = 1;
755 }
756
757 /*
758 * Check for mode changes ... we're extremely limited in
759 * what can be set for SMB servers: just the read-only bit.
760 */
761 if ((attr->ia_valid & ATTR_MODE) != 0) {
762 VERBOSE("%s/%s mode change, old=%x, new=%x\n",
763 DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode);
764 changed = 0;
765 if (attr->ia_mode & S_IWUSR) {
766 if (fattr.attr & aRONLY) {
767 fattr.attr &= ~aRONLY;
768 changed = 1;
769 }
770 } else {
771 if (!(fattr.attr & aRONLY)) {
772 fattr.attr |= aRONLY;
773 changed = 1;
774 }
775 }
776 if (changed) {
777 error = smb_proc_setattr(dentry, &fattr);
778 if (error)
779 goto out;
780 refresh = 1;
781 }
782 }
783 error = 0;
784
785out:
786 if (refresh)
787 smb_refresh_inode(dentry);
788 unlock_kernel();
789 return error;
790}
791
792static int smb_get_sb(struct file_system_type *fs_type,
793 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
794{
795 return get_sb_nodev(fs_type, flags, data, smb_fill_super, mnt);
796}
797
798static struct file_system_type smb_fs_type = {
799 .owner = THIS_MODULE,
800 .name = "smbfs",
801 .get_sb = smb_get_sb,
802 .kill_sb = kill_anon_super,
803 .fs_flags = FS_BINARY_MOUNTDATA,
804};
805
806static int __init init_smb_fs(void)
807{
808 int err;
809 DEBUG1("registering ...\n");
810
811 err = init_inodecache();
812 if (err)
813 goto out_inode;
814 err = smb_init_request_cache();
815 if (err)
816 goto out_request;
817 err = register_filesystem(&smb_fs_type);
818 if (err)
819 goto out;
820 return 0;
821out:
822 smb_destroy_request_cache();
823out_request:
824 destroy_inodecache();
825out_inode:
826 return err;
827}
828
829static void __exit exit_smb_fs(void)
830{
831 DEBUG1("unregistering ...\n");
832 unregister_filesystem(&smb_fs_type);
833 smb_destroy_request_cache();
834 destroy_inodecache();
835}
836
837module_init(init_smb_fs)
838module_exit(exit_smb_fs)
839MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-02 04:28:23 -0400