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-rw-r--r--fs/smbfs/inode.c843
1 files changed, 0 insertions, 843 deletions
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
deleted file mode 100644
index f6e9ee59757e..000000000000
--- a/fs/smbfs/inode.c
+++ /dev/null
@@ -1,843 +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}
233
234/*
235 * This is called to update the inode attributes after
236 * we've made changes to a file or directory.
237 */
238static int
239smb_refresh_inode(struct dentry *dentry)
240{
241 struct inode *inode = dentry->d_inode;
242 int error;
243 struct smb_fattr fattr;
244
245 error = smb_proc_getattr(dentry, &fattr);
246 if (!error) {
247 smb_renew_times(dentry);
248 /*
249 * Check whether the type part of the mode changed,
250 * and don't update the attributes if it did.
251 *
252 * And don't dick with the root inode
253 */
254 if (inode->i_ino == 2)
255 return error;
256 if (S_ISLNK(inode->i_mode))
257 return error; /* VFS will deal with it */
258
259 if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) {
260 smb_set_inode_attr(inode, &fattr);
261 } else {
262 /*
263 * Big trouble! The inode has become a new object,
264 * so any operations attempted on it are invalid.
265 *
266 * To limit damage, mark the inode as bad so that
267 * subsequent lookup validations will fail.
268 */
269 PARANOIA("%s/%s changed mode, %07o to %07o\n",
270 DENTRY_PATH(dentry),
271 inode->i_mode, fattr.f_mode);
272
273 fattr.f_mode = inode->i_mode; /* save mode */
274 make_bad_inode(inode);
275 inode->i_mode = fattr.f_mode; /* restore mode */
276 /*
277 * No need to worry about unhashing the dentry: the
278 * lookup validation will see that the inode is bad.
279 * But we do want to invalidate the caches ...
280 */
281 if (!S_ISDIR(inode->i_mode))
282 invalidate_remote_inode(inode);
283 else
284 smb_invalid_dir_cache(inode);
285 error = -EIO;
286 }
287 }
288 return error;
289}
290
291/*
292 * This is called when we want to check whether the inode
293 * has changed on the server. If it has changed, we must
294 * invalidate our local caches.
295 */
296int
297smb_revalidate_inode(struct dentry *dentry)
298{
299 struct smb_sb_info *s = server_from_dentry(dentry);
300 struct inode *inode = dentry->d_inode;
301 int error = 0;
302
303 DEBUG1("smb_revalidate_inode\n");
304 lock_kernel();
305
306 /*
307 * Check whether we've recently refreshed the inode.
308 */
309 if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) {
310 VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n",
311 inode->i_ino, jiffies, SMB_I(inode)->oldmtime);
312 goto out;
313 }
314
315 error = smb_refresh_inode(dentry);
316out:
317 unlock_kernel();
318 return error;
319}
320
321/*
322 * This routine is called when i_nlink == 0 and i_count goes to 0.
323 * All blocking cleanup operations need to go here to avoid races.
324 */
325static void
326smb_evict_inode(struct inode *ino)
327{
328 DEBUG1("ino=%ld\n", ino->i_ino);
329 truncate_inode_pages(&ino->i_data, 0);
330 end_writeback(ino);
331 lock_kernel();
332 if (smb_close(ino))
333 PARANOIA("could not close inode %ld\n", ino->i_ino);
334 unlock_kernel();
335}
336
337static struct option opts[] = {
338 { "version", 0, 'v' },
339 { "win95", SMB_MOUNT_WIN95, 1 },
340 { "oldattr", SMB_MOUNT_OLDATTR, 1 },
341 { "dirattr", SMB_MOUNT_DIRATTR, 1 },
342 { "case", SMB_MOUNT_CASE, 1 },
343 { "uid", 0, 'u' },
344 { "gid", 0, 'g' },
345 { "file_mode", 0, 'f' },
346 { "dir_mode", 0, 'd' },
347 { "iocharset", 0, 'i' },
348 { "codepage", 0, 'c' },
349 { "ttl", 0, 't' },
350 { NULL, 0, 0}
351};
352
353static int
354parse_options(struct smb_mount_data_kernel *mnt, char *options)
355{
356 int c;
357 unsigned long flags;
358 unsigned long value;
359 char *optarg;
360 char *optopt;
361
362 flags = 0;
363 while ( (c = smb_getopt("smbfs", &options, opts,
364 &optopt, &optarg, &flags, &value)) > 0) {
365
366 VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>");
367 switch (c) {
368 case 1:
369 /* got a "flag" option */
370 break;
371 case 'v':
372 if (value != SMB_MOUNT_VERSION) {
373 printk ("smbfs: Bad mount version %ld, expected %d\n",
374 value, SMB_MOUNT_VERSION);
375 return 0;
376 }
377 mnt->version = value;
378 break;
379 case 'u':
380 mnt->uid = value;
381 flags |= SMB_MOUNT_UID;
382 break;
383 case 'g':
384 mnt->gid = value;
385 flags |= SMB_MOUNT_GID;
386 break;
387 case 'f':
388 mnt->file_mode = (value & S_IRWXUGO) | S_IFREG;
389 flags |= SMB_MOUNT_FMODE;
390 break;
391 case 'd':
392 mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR;
393 flags |= SMB_MOUNT_DMODE;
394 break;
395 case 'i':
396 strlcpy(mnt->codepage.local_name, optarg,
397 SMB_NLS_MAXNAMELEN);
398 break;
399 case 'c':
400 strlcpy(mnt->codepage.remote_name, optarg,
401 SMB_NLS_MAXNAMELEN);
402 break;
403 case 't':
404 mnt->ttl = value;
405 break;
406 default:
407 printk ("smbfs: Unrecognized mount option %s\n",
408 optopt);
409 return -1;
410 }
411 }
412 mnt->flags = flags;
413 return c;
414}
415
416/*
417 * smb_show_options() is for displaying mount options in /proc/mounts.
418 * It tries to avoid showing settings that were not changed from their
419 * defaults.
420 */
421static int
422smb_show_options(struct seq_file *s, struct vfsmount *m)
423{
424 struct smb_mount_data_kernel *mnt = SMB_SB(m->mnt_sb)->mnt;
425 int i;
426
427 for (i = 0; opts[i].name != NULL; i++)
428 if (mnt->flags & opts[i].flag)
429 seq_printf(s, ",%s", opts[i].name);
430
431 if (mnt->flags & SMB_MOUNT_UID)
432 seq_printf(s, ",uid=%d", mnt->uid);
433 if (mnt->flags & SMB_MOUNT_GID)
434 seq_printf(s, ",gid=%d", mnt->gid);
435 if (mnt->mounted_uid != 0)
436 seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid);
437
438 /*
439 * Defaults for file_mode and dir_mode are unknown to us; they
440 * depend on the current umask of the user doing the mount.
441 */
442 if (mnt->flags & SMB_MOUNT_FMODE)
443 seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO);
444 if (mnt->flags & SMB_MOUNT_DMODE)
445 seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO);
446
447 if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT))
448 seq_printf(s, ",iocharset=%s", mnt->codepage.local_name);
449 if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE))
450 seq_printf(s, ",codepage=%s", mnt->codepage.remote_name);
451
452 if (mnt->ttl != SMB_TTL_DEFAULT)
453 seq_printf(s, ",ttl=%d", mnt->ttl);
454
455 return 0;
456}
457
458static void
459smb_unload_nls(struct smb_sb_info *server)
460{
461 unload_nls(server->remote_nls);
462 unload_nls(server->local_nls);
463}
464
465static void
466smb_put_super(struct super_block *sb)
467{
468 struct smb_sb_info *server = SMB_SB(sb);
469
470 lock_kernel();
471
472 smb_lock_server(server);
473 server->state = CONN_INVALID;
474 smbiod_unregister_server(server);
475
476 smb_close_socket(server);
477
478 if (server->conn_pid)
479 kill_pid(server->conn_pid, SIGTERM, 1);
480
481 bdi_destroy(&server->bdi);
482 kfree(server->ops);
483 smb_unload_nls(server);
484 sb->s_fs_info = NULL;
485 smb_unlock_server(server);
486 put_pid(server->conn_pid);
487 kfree(server);
488
489 unlock_kernel();
490}
491
492static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
493{
494 struct smb_sb_info *server;
495 struct smb_mount_data_kernel *mnt;
496 struct smb_mount_data *oldmnt;
497 struct inode *root_inode;
498 struct smb_fattr root;
499 int ver;
500 void *mem;
501 static int warn_count;
502
503 lock_kernel();
504
505 if (warn_count < 5) {
506 warn_count++;
507 printk(KERN_EMERG "smbfs is deprecated and will be removed"
508 " from the 2.6.27 kernel. Please migrate to cifs\n");
509 }
510
511 if (!raw_data)
512 goto out_no_data;
513
514 oldmnt = (struct smb_mount_data *) raw_data;
515 ver = oldmnt->version;
516 if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII)
517 goto out_wrong_data;
518
519 sb->s_flags |= MS_NODIRATIME;
520 sb->s_blocksize = 1024; /* Eh... Is this correct? */
521 sb->s_blocksize_bits = 10;
522 sb->s_magic = SMB_SUPER_MAGIC;
523 sb->s_op = &smb_sops;
524 sb->s_time_gran = 100;
525
526 server = kzalloc(sizeof(struct smb_sb_info), GFP_KERNEL);
527 if (!server)
528 goto out_no_server;
529 sb->s_fs_info = server;
530
531 if (bdi_setup_and_register(&server->bdi, "smbfs", BDI_CAP_MAP_COPY))
532 goto out_bdi;
533
534 sb->s_bdi = &server->bdi;
535
536 server->super_block = sb;
537 server->mnt = NULL;
538 server->sock_file = NULL;
539 init_waitqueue_head(&server->conn_wq);
540 init_MUTEX(&server->sem);
541 INIT_LIST_HEAD(&server->entry);
542 INIT_LIST_HEAD(&server->xmitq);
543 INIT_LIST_HEAD(&server->recvq);
544 server->conn_error = 0;
545 server->conn_pid = NULL;
546 server->state = CONN_INVALID; /* no connection yet */
547 server->generation = 0;
548
549 /* Allocate the global temp buffer and some superblock helper structs */
550 /* FIXME: move these to the smb_sb_info struct */
551 VERBOSE("alloc chunk = %lu\n", sizeof(struct smb_ops) +
552 sizeof(struct smb_mount_data_kernel));
553 mem = kmalloc(sizeof(struct smb_ops) +
554 sizeof(struct smb_mount_data_kernel), GFP_KERNEL);
555 if (!mem)
556 goto out_no_mem;
557
558 server->ops = mem;
559 smb_install_null_ops(server->ops);
560 server->mnt = mem + sizeof(struct smb_ops);
561
562 /* Setup NLS stuff */
563 server->remote_nls = NULL;
564 server->local_nls = NULL;
565
566 mnt = server->mnt;
567
568 memset(mnt, 0, sizeof(struct smb_mount_data_kernel));
569 strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT,
570 SMB_NLS_MAXNAMELEN);
571 strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE,
572 SMB_NLS_MAXNAMELEN);
573
574 mnt->ttl = SMB_TTL_DEFAULT;
575 if (ver == SMB_MOUNT_OLDVERSION) {
576 mnt->version = oldmnt->version;
577
578 SET_UID(mnt->uid, oldmnt->uid);
579 SET_GID(mnt->gid, oldmnt->gid);
580
581 mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
582 mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;
583
584 mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID |
585 SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE;
586 } else {
587 mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP |
588 S_IROTH | S_IXOTH | S_IFREG;
589 mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP |
590 S_IROTH | S_IXOTH | S_IFDIR;
591 if (parse_options(mnt, raw_data))
592 goto out_bad_option;
593 }
594 mnt->mounted_uid = current_uid();
595 smb_setcodepage(server, &mnt->codepage);
596
597 /*
598 * Display the enabled options
599 * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2)
600 */
601 if (mnt->flags & SMB_MOUNT_OLDATTR)
602 printk("SMBFS: Using core getattr (Win 95 speedup)\n");
603 else if (mnt->flags & SMB_MOUNT_DIRATTR)
604 printk("SMBFS: Using dir ff getattr\n");
605
606 if (smbiod_register_server(server) < 0) {
607 printk(KERN_ERR "smbfs: failed to start smbiod\n");
608 goto out_no_smbiod;
609 }
610
611 /*
612 * Keep the super block locked while we get the root inode.
613 */
614 smb_init_root_dirent(server, &root, sb);
615 root_inode = smb_iget(sb, &root);
616 if (!root_inode)
617 goto out_no_root;
618
619 sb->s_root = d_alloc_root(root_inode);
620 if (!sb->s_root)
621 goto out_no_root;
622
623 smb_new_dentry(sb->s_root);
624
625 unlock_kernel();
626 return 0;
627
628out_no_root:
629 iput(root_inode);
630out_no_smbiod:
631 smb_unload_nls(server);
632out_bad_option:
633 kfree(mem);
634out_no_mem:
635 bdi_destroy(&server->bdi);
636out_bdi:
637 if (!server->mnt)
638 printk(KERN_ERR "smb_fill_super: allocation failure\n");
639 sb->s_fs_info = NULL;
640 kfree(server);
641 goto out_fail;
642out_wrong_data:
643 printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver);
644 goto out_fail;
645out_no_data:
646 printk(KERN_ERR "smb_fill_super: missing data argument\n");
647out_fail:
648 unlock_kernel();
649 return -EINVAL;
650out_no_server:
651 printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
652 unlock_kernel();
653 return -ENOMEM;
654}
655
656static int
657smb_statfs(struct dentry *dentry, struct kstatfs *buf)
658{
659 int result;
660
661 lock_kernel();
662
663 result = smb_proc_dskattr(dentry, buf);
664
665 unlock_kernel();
666
667 buf->f_type = SMB_SUPER_MAGIC;
668 buf->f_namelen = SMB_MAXPATHLEN;
669 return result;
670}
671
672int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
673{
674 int err = smb_revalidate_inode(dentry);
675 if (!err)
676 generic_fillattr(dentry->d_inode, stat);
677 return err;
678}
679
680int
681smb_notify_change(struct dentry *dentry, struct iattr *attr)
682{
683 struct inode *inode = dentry->d_inode;
684 struct smb_sb_info *server = server_from_dentry(dentry);
685 unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO);
686 int error, changed, refresh = 0;
687 struct smb_fattr fattr;
688
689 lock_kernel();
690
691 error = smb_revalidate_inode(dentry);
692 if (error)
693 goto out;
694
695 if ((error = inode_change_ok(inode, attr)) < 0)
696 goto out;
697
698 error = -EPERM;
699 if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid))
700 goto out;
701
702 if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid))
703 goto out;
704
705 if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask))
706 goto out;
707
708 if ((attr->ia_valid & ATTR_SIZE) != 0) {
709 VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n",
710 DENTRY_PATH(dentry),
711 (long) inode->i_size, (long) attr->ia_size);
712
713 filemap_write_and_wait(inode->i_mapping);
714
715 error = smb_open(dentry, O_WRONLY);
716 if (error)
717 goto out;
718 error = server->ops->truncate(inode, attr->ia_size);
719 if (error)
720 goto out;
721 truncate_setsize(inode, attr->ia_size);
722 refresh = 1;
723 }
724
725 if (server->opt.capabilities & SMB_CAP_UNIX) {
726 /* For now we don't want to set the size with setattr_unix */
727 attr->ia_valid &= ~ATTR_SIZE;
728 /* FIXME: only call if we actually want to set something? */
729 error = smb_proc_setattr_unix(dentry, attr, 0, 0);
730 if (!error)
731 refresh = 1;
732
733 goto out;
734 }
735
736 /*
737 * Initialize the fattr and check for changed fields.
738 * Note: CTIME under SMB is creation time rather than
739 * change time, so we don't attempt to change it.
740 */
741 smb_get_inode_attr(inode, &fattr);
742
743 changed = 0;
744 if ((attr->ia_valid & ATTR_MTIME) != 0) {
745 fattr.f_mtime = attr->ia_mtime;
746 changed = 1;
747 }
748 if ((attr->ia_valid & ATTR_ATIME) != 0) {
749 fattr.f_atime = attr->ia_atime;
750 /* Earlier protocols don't have an access time */
751 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2)
752 changed = 1;
753 }
754 if (changed) {
755 error = smb_proc_settime(dentry, &fattr);
756 if (error)
757 goto out;
758 refresh = 1;
759 }
760
761 /*
762 * Check for mode changes ... we're extremely limited in
763 * what can be set for SMB servers: just the read-only bit.
764 */
765 if ((attr->ia_valid & ATTR_MODE) != 0) {
766 VERBOSE("%s/%s mode change, old=%x, new=%x\n",
767 DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode);
768 changed = 0;
769 if (attr->ia_mode & S_IWUSR) {
770 if (fattr.attr & aRONLY) {
771 fattr.attr &= ~aRONLY;
772 changed = 1;
773 }
774 } else {
775 if (!(fattr.attr & aRONLY)) {
776 fattr.attr |= aRONLY;
777 changed = 1;
778 }
779 }
780 if (changed) {
781 error = smb_proc_setattr(dentry, &fattr);
782 if (error)
783 goto out;
784 refresh = 1;
785 }
786 }
787 error = 0;
788
789out:
790 if (refresh)
791 smb_refresh_inode(dentry);
792 unlock_kernel();
793 return error;
794}
795
796static int smb_get_sb(struct file_system_type *fs_type,
797 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
798{
799 return get_sb_nodev(fs_type, flags, data, smb_fill_super, mnt);
800}
801
802static struct file_system_type smb_fs_type = {
803 .owner = THIS_MODULE,
804 .name = "smbfs",
805 .get_sb = smb_get_sb,
806 .kill_sb = kill_anon_super,
807 .fs_flags = FS_BINARY_MOUNTDATA,
808};
809
810static int __init init_smb_fs(void)
811{
812 int err;
813 DEBUG1("registering ...\n");
814
815 err = init_inodecache();
816 if (err)
817 goto out_inode;
818 err = smb_init_request_cache();
819 if (err)
820 goto out_request;
821 err = register_filesystem(&smb_fs_type);
822 if (err)
823 goto out;
824 return 0;
825out:
826 smb_destroy_request_cache();
827out_request:
828 destroy_inodecache();
829out_inode:
830 return err;
831}
832
833static void __exit exit_smb_fs(void)
834{
835 DEBUG1("unregistering ...\n");
836 unregister_filesystem(&smb_fs_type);
837 smb_destroy_request_cache();
838 destroy_inodecache();
839}
840
841module_init(init_smb_fs)
842module_exit(exit_smb_fs)
843MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-19 23:29:39 -0400