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-rw-r--r--fs/smbfs/inode.c849
1 files changed, 849 insertions, 0 deletions
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
new file mode 100644
index 000000000000..4765aaac9fd2
--- /dev/null
+++ b/fs/smbfs/inode.c
@@ -0,0 +1,849 @@
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/time.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/slab.h>
19#include <linux/init.h>
20#include <linux/file.h>
21#include <linux/dcache.h>
22#include <linux/smp_lock.h>
23#include <linux/nls.h>
24#include <linux/seq_file.h>
25#include <linux/mount.h>
26#include <linux/net.h>
27#include <linux/vfs.h>
28#include <linux/highuid.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_delete_inode(struct inode *);
50static void smb_put_super(struct super_block *);
51static int smb_statfs(struct super_block *, struct kstatfs *);
52static int smb_show_options(struct seq_file *, struct vfsmount *);
53
54static kmem_cache_t *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, SLAB_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, kmem_cache_t * cachep, unsigned long flags)
71{
72 struct smb_inode_info *ei = (struct smb_inode_info *) foo;
73 unsigned long flagmask = SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR;
74
75 if ((flags & flagmask) == SLAB_CTOR_CONSTRUCTOR)
76 inode_init_once(&ei->vfs_inode);
77}
78
79static int init_inodecache(void)
80{
81 smb_inode_cachep = kmem_cache_create("smb_inode_cache",
82 sizeof(struct smb_inode_info),
83 0, SLAB_RECLAIM_ACCOUNT,
84 init_once, NULL);
85 if (smb_inode_cachep == NULL)
86 return -ENOMEM;
87 return 0;
88}
89
90static void destroy_inodecache(void)
91{
92 if (kmem_cache_destroy(smb_inode_cachep))
93 printk(KERN_INFO "smb_inode_cache: not all structures were freed\n");
94}
95
96static int smb_remount(struct super_block *sb, int *flags, char *data)
97{
98 *flags |= MS_NODIRATIME;
99 return 0;
100}
101
102static struct super_operations smb_sops =
103{
104 .alloc_inode = smb_alloc_inode,
105 .destroy_inode = smb_destroy_inode,
106 .drop_inode = generic_delete_inode,
107 .delete_inode = smb_delete_inode,
108 .put_super = smb_put_super,
109 .statfs = smb_statfs,
110 .show_options = smb_show_options,
111 .remount_fs = smb_remount,
112};
113
114
115/* We are always generating a new inode here */
116struct inode *
117smb_iget(struct super_block *sb, struct smb_fattr *fattr)
118{
119 struct smb_sb_info *server = SMB_SB(sb);
120 struct inode *result;
121
122 DEBUG1("smb_iget: %p\n", fattr);
123
124 result = new_inode(sb);
125 if (!result)
126 return result;
127 result->i_ino = fattr->f_ino;
128 SMB_I(result)->open = 0;
129 SMB_I(result)->fileid = 0;
130 SMB_I(result)->access = 0;
131 SMB_I(result)->flags = 0;
132 SMB_I(result)->closed = 0;
133 SMB_I(result)->openers = 0;
134 smb_set_inode_attr(result, fattr);
135 if (S_ISREG(result->i_mode)) {
136 result->i_op = &smb_file_inode_operations;
137 result->i_fop = &smb_file_operations;
138 result->i_data.a_ops = &smb_file_aops;
139 } else if (S_ISDIR(result->i_mode)) {
140 if (server->opt.capabilities & SMB_CAP_UNIX)
141 result->i_op = &smb_dir_inode_operations_unix;
142 else
143 result->i_op = &smb_dir_inode_operations;
144 result->i_fop = &smb_dir_operations;
145 } else if (S_ISLNK(result->i_mode)) {
146 result->i_op = &smb_link_inode_operations;
147 } else {
148 init_special_inode(result, result->i_mode, fattr->f_rdev);
149 }
150 insert_inode_hash(result);
151 return result;
152}
153
154/*
155 * Copy the inode data to a smb_fattr structure.
156 */
157void
158smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr)
159{
160 memset(fattr, 0, sizeof(struct smb_fattr));
161 fattr->f_mode = inode->i_mode;
162 fattr->f_nlink = inode->i_nlink;
163 fattr->f_ino = inode->i_ino;
164 fattr->f_uid = inode->i_uid;
165 fattr->f_gid = inode->i_gid;
166 fattr->f_size = inode->i_size;
167 fattr->f_mtime = inode->i_mtime;
168 fattr->f_ctime = inode->i_ctime;
169 fattr->f_atime = inode->i_atime;
170 fattr->f_blksize= inode->i_blksize;
171 fattr->f_blocks = inode->i_blocks;
172
173 fattr->attr = SMB_I(inode)->attr;
174 /*
175 * Keep the attributes in sync with the inode permissions.
176 */
177 if (fattr->f_mode & S_IWUSR)
178 fattr->attr &= ~aRONLY;
179 else
180 fattr->attr |= aRONLY;
181}
182
183/*
184 * Update the inode, possibly causing it to invalidate its pages if mtime/size
185 * is different from last time.
186 */
187void
188smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr)
189{
190 struct smb_inode_info *ei = SMB_I(inode);
191
192 /*
193 * A size change should have a different mtime, or same mtime
194 * but different size.
195 */
196 time_t last_time = inode->i_mtime.tv_sec;
197 loff_t last_sz = inode->i_size;
198
199 inode->i_mode = fattr->f_mode;
200 inode->i_nlink = fattr->f_nlink;
201 inode->i_uid = fattr->f_uid;
202 inode->i_gid = fattr->f_gid;
203 inode->i_ctime = fattr->f_ctime;
204 inode->i_blksize= fattr->f_blksize;
205 inode->i_blocks = fattr->f_blocks;
206 inode->i_size = fattr->f_size;
207 inode->i_mtime = fattr->f_mtime;
208 inode->i_atime = fattr->f_atime;
209 ei->attr = fattr->attr;
210
211 /*
212 * Update the "last time refreshed" field for revalidation.
213 */
214 ei->oldmtime = jiffies;
215
216 if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) {
217 VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n",
218 inode->i_ino,
219 (long) last_time, (long) inode->i_mtime,
220 (long) last_sz, (long) inode->i_size);
221
222 if (!S_ISDIR(inode->i_mode))
223 invalidate_remote_inode(inode);
224 }
225}
226
227/*
228 * This is called if the connection has gone bad ...
229 * try to kill off all the current inodes.
230 */
231void
232smb_invalidate_inodes(struct smb_sb_info *server)
233{
234 VERBOSE("\n");
235 shrink_dcache_sb(SB_of(server));
236 invalidate_inodes(SB_of(server));
237}
238
239/*
240 * This is called to update the inode attributes after
241 * we've made changes to a file or directory.
242 */
243static int
244smb_refresh_inode(struct dentry *dentry)
245{
246 struct inode *inode = dentry->d_inode;
247 int error;
248 struct smb_fattr fattr;
249
250 error = smb_proc_getattr(dentry, &fattr);
251 if (!error) {
252 smb_renew_times(dentry);
253 /*
254 * Check whether the type part of the mode changed,
255 * and don't update the attributes if it did.
256 *
257 * And don't dick with the root inode
258 */
259 if (inode->i_ino == 2)
260 return error;
261 if (S_ISLNK(inode->i_mode))
262 return error; /* VFS will deal with it */
263
264 if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) {
265 smb_set_inode_attr(inode, &fattr);
266 } else {
267 /*
268 * Big trouble! The inode has become a new object,
269 * so any operations attempted on it are invalid.
270 *
271 * To limit damage, mark the inode as bad so that
272 * subsequent lookup validations will fail.
273 */
274 PARANOIA("%s/%s changed mode, %07o to %07o\n",
275 DENTRY_PATH(dentry),
276 inode->i_mode, fattr.f_mode);
277
278 fattr.f_mode = inode->i_mode; /* save mode */
279 make_bad_inode(inode);
280 inode->i_mode = fattr.f_mode; /* restore mode */
281 /*
282 * No need to worry about unhashing the dentry: the
283 * lookup validation will see that the inode is bad.
284 * But we do want to invalidate the caches ...
285 */
286 if (!S_ISDIR(inode->i_mode))
287 invalidate_remote_inode(inode);
288 else
289 smb_invalid_dir_cache(inode);
290 error = -EIO;
291 }
292 }
293 return error;
294}
295
296/*
297 * This is called when we want to check whether the inode
298 * has changed on the server. If it has changed, we must
299 * invalidate our local caches.
300 */
301int
302smb_revalidate_inode(struct dentry *dentry)
303{
304 struct smb_sb_info *s = server_from_dentry(dentry);
305 struct inode *inode = dentry->d_inode;
306 int error = 0;
307
308 DEBUG1("smb_revalidate_inode\n");
309 lock_kernel();
310
311 /*
312 * Check whether we've recently refreshed the inode.
313 */
314 if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) {
315 VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n",
316 inode->i_ino, jiffies, SMB_I(inode)->oldmtime);
317 goto out;
318 }
319
320 error = smb_refresh_inode(dentry);
321out:
322 unlock_kernel();
323 return error;
324}
325
326/*
327 * This routine is called when i_nlink == 0 and i_count goes to 0.
328 * All blocking cleanup operations need to go here to avoid races.
329 */
330static void
331smb_delete_inode(struct inode *ino)
332{
333 DEBUG1("ino=%ld\n", ino->i_ino);
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
489 smb_kfree(server->ops);
490 smb_unload_nls(server);
491 sb->s_fs_info = NULL;
492 smb_unlock_server(server);
493 smb_kfree(server);
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
521 server = smb_kmalloc(sizeof(struct smb_sb_info), GFP_KERNEL);
522 if (!server)
523 goto out_no_server;
524 sb->s_fs_info = server;
525 memset(server, 0, sizeof(struct smb_sb_info));
526
527 server->super_block = sb;
528 server->mnt = NULL;
529 server->sock_file = NULL;
530 init_waitqueue_head(&server->conn_wq);
531 init_MUTEX(&server->sem);
532 INIT_LIST_HEAD(&server->entry);
533 INIT_LIST_HEAD(&server->xmitq);
534 INIT_LIST_HEAD(&server->recvq);
535 server->conn_error = 0;
536 server->conn_pid = 0;
537 server->state = CONN_INVALID; /* no connection yet */
538 server->generation = 0;
539
540 /* Allocate the global temp buffer and some superblock helper structs */
541 /* FIXME: move these to the smb_sb_info struct */
542 VERBOSE("alloc chunk = %d\n", sizeof(struct smb_ops) +
543 sizeof(struct smb_mount_data_kernel));
544 mem = smb_kmalloc(sizeof(struct smb_ops) +
545 sizeof(struct smb_mount_data_kernel), GFP_KERNEL);
546 if (!mem)
547 goto out_no_mem;
548
549 server->ops = mem;
550 smb_install_null_ops(server->ops);
551 server->mnt = mem + sizeof(struct smb_ops);
552
553 /* Setup NLS stuff */
554 server->remote_nls = NULL;
555 server->local_nls = NULL;
556
557 mnt = server->mnt;
558
559 memset(mnt, 0, sizeof(struct smb_mount_data_kernel));
560 strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT,
561 SMB_NLS_MAXNAMELEN);
562 strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE,
563 SMB_NLS_MAXNAMELEN);
564
565 mnt->ttl = SMB_TTL_DEFAULT;
566 if (ver == SMB_MOUNT_OLDVERSION) {
567 mnt->version = oldmnt->version;
568
569 SET_UID(mnt->uid, oldmnt->uid);
570 SET_GID(mnt->gid, oldmnt->gid);
571
572 mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
573 mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;
574
575 mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID |
576 SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE;
577 } else {
578 mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP |
579 S_IROTH | S_IXOTH | S_IFREG;
580 mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP |
581 S_IROTH | S_IXOTH | S_IFDIR;
582 if (parse_options(mnt, raw_data))
583 goto out_bad_option;
584 }
585 mnt->mounted_uid = current->uid;
586 smb_setcodepage(server, &mnt->codepage);
587
588 /*
589 * Display the enabled options
590 * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2)
591 */
592 if (mnt->flags & SMB_MOUNT_OLDATTR)
593 printk("SMBFS: Using core getattr (Win 95 speedup)\n");
594 else if (mnt->flags & SMB_MOUNT_DIRATTR)
595 printk("SMBFS: Using dir ff getattr\n");
596
597 if (smbiod_register_server(server) < 0) {
598 printk(KERN_ERR "smbfs: failed to start smbiod\n");
599 goto out_no_smbiod;
600 }
601
602 /*
603 * Keep the super block locked while we get the root inode.
604 */
605 smb_init_root_dirent(server, &root, sb);
606 root_inode = smb_iget(sb, &root);
607 if (!root_inode)
608 goto out_no_root;
609
610 sb->s_root = d_alloc_root(root_inode);
611 if (!sb->s_root)
612 goto out_no_root;
613
614 smb_new_dentry(sb->s_root);
615
616 return 0;
617
618out_no_root:
619 iput(root_inode);
620out_no_smbiod:
621 smb_unload_nls(server);
622out_bad_option:
623 smb_kfree(mem);
624out_no_mem:
625 if (!server->mnt)
626 printk(KERN_ERR "smb_fill_super: allocation failure\n");
627 sb->s_fs_info = NULL;
628 smb_kfree(server);
629 goto out_fail;
630out_wrong_data:
631 printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver);
632 goto out_fail;
633out_no_data:
634 printk(KERN_ERR "smb_fill_super: missing data argument\n");
635out_fail:
636 return -EINVAL;
637out_no_server:
638 printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
639 return -ENOMEM;
640}
641
642static int
643smb_statfs(struct super_block *sb, struct kstatfs *buf)
644{
645 int result;
646
647 lock_kernel();
648
649 result = smb_proc_dskattr(sb, buf);
650
651 unlock_kernel();
652
653 buf->f_type = SMB_SUPER_MAGIC;
654 buf->f_namelen = SMB_MAXPATHLEN;
655 return result;
656}
657
658int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
659{
660 int err = smb_revalidate_inode(dentry);
661 if (!err)
662 generic_fillattr(dentry->d_inode, stat);
663 return err;
664}
665
666int
667smb_notify_change(struct dentry *dentry, struct iattr *attr)
668{
669 struct inode *inode = dentry->d_inode;
670 struct smb_sb_info *server = server_from_dentry(dentry);
671 unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO);
672 int error, changed, refresh = 0;
673 struct smb_fattr fattr;
674
675 lock_kernel();
676
677 error = smb_revalidate_inode(dentry);
678 if (error)
679 goto out;
680
681 if ((error = inode_change_ok(inode, attr)) < 0)
682 goto out;
683
684 error = -EPERM;
685 if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid))
686 goto out;
687
688 if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid))
689 goto out;
690
691 if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask))
692 goto out;
693
694 if ((attr->ia_valid & ATTR_SIZE) != 0) {
695 VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n",
696 DENTRY_PATH(dentry),
697 (long) inode->i_size, (long) attr->ia_size);
698
699 filemap_fdatawrite(inode->i_mapping);
700 filemap_fdatawait(inode->i_mapping);
701
702 error = smb_open(dentry, O_WRONLY);
703 if (error)
704 goto out;
705 error = server->ops->truncate(inode, attr->ia_size);
706 if (error)
707 goto out;
708 error = vmtruncate(inode, attr->ia_size);
709 if (error)
710 goto out;
711 refresh = 1;
712 }
713
714 if (server->opt.capabilities & SMB_CAP_UNIX) {
715 /* For now we don't want to set the size with setattr_unix */
716 attr->ia_valid &= ~ATTR_SIZE;
717 /* FIXME: only call if we actually want to set something? */
718 error = smb_proc_setattr_unix(dentry, attr, 0, 0);
719 if (!error)
720 refresh = 1;
721
722 goto out;
723 }
724
725 /*
726 * Initialize the fattr and check for changed fields.
727 * Note: CTIME under SMB is creation time rather than
728 * change time, so we don't attempt to change it.
729 */
730 smb_get_inode_attr(inode, &fattr);
731
732 changed = 0;
733 if ((attr->ia_valid & ATTR_MTIME) != 0) {
734 fattr.f_mtime = attr->ia_mtime;
735 changed = 1;
736 }
737 if ((attr->ia_valid & ATTR_ATIME) != 0) {
738 fattr.f_atime = attr->ia_atime;
739 /* Earlier protocols don't have an access time */
740 if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2)
741 changed = 1;
742 }
743 if (changed) {
744 error = smb_proc_settime(dentry, &fattr);
745 if (error)
746 goto out;
747 refresh = 1;
748 }
749
750 /*
751 * Check for mode changes ... we're extremely limited in
752 * what can be set for SMB servers: just the read-only bit.
753 */
754 if ((attr->ia_valid & ATTR_MODE) != 0) {
755 VERBOSE("%s/%s mode change, old=%x, new=%x\n",
756 DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode);
757 changed = 0;
758 if (attr->ia_mode & S_IWUSR) {
759 if (fattr.attr & aRONLY) {
760 fattr.attr &= ~aRONLY;
761 changed = 1;
762 }
763 } else {
764 if (!(fattr.attr & aRONLY)) {
765 fattr.attr |= aRONLY;
766 changed = 1;
767 }
768 }
769 if (changed) {
770 error = smb_proc_setattr(dentry, &fattr);
771 if (error)
772 goto out;
773 refresh = 1;
774 }
775 }
776 error = 0;
777
778out:
779 if (refresh)
780 smb_refresh_inode(dentry);
781 unlock_kernel();
782 return error;
783}
784
785#ifdef DEBUG_SMB_MALLOC
786int smb_malloced;
787int smb_current_kmalloced;
788int smb_current_vmalloced;
789#endif
790
791static struct super_block *smb_get_sb(struct file_system_type *fs_type,
792 int flags, const char *dev_name, void *data)
793{
794 return get_sb_nodev(fs_type, flags, data, smb_fill_super);
795}
796
797static struct file_system_type smb_fs_type = {
798 .owner = THIS_MODULE,
799 .name = "smbfs",
800 .get_sb = smb_get_sb,
801 .kill_sb = kill_anon_super,
802 .fs_flags = FS_BINARY_MOUNTDATA,
803};
804
805static int __init init_smb_fs(void)
806{
807 int err;
808 DEBUG1("registering ...\n");
809
810#ifdef DEBUG_SMB_MALLOC
811 smb_malloced = 0;
812 smb_current_kmalloced = 0;
813 smb_current_vmalloced = 0;
814#endif
815
816 err = init_inodecache();
817 if (err)
818 goto out_inode;
819 err = smb_init_request_cache();
820 if (err)
821 goto out_request;
822 err = register_filesystem(&smb_fs_type);
823 if (err)
824 goto out;
825 return 0;
826out:
827 smb_destroy_request_cache();
828out_request:
829 destroy_inodecache();
830out_inode:
831 return err;
832}
833
834static void __exit exit_smb_fs(void)
835{
836 DEBUG1("unregistering ...\n");
837 unregister_filesystem(&smb_fs_type);
838 smb_destroy_request_cache();
839 destroy_inodecache();
840#ifdef DEBUG_SMB_MALLOC
841 printk(KERN_DEBUG "smb_malloced: %d\n", smb_malloced);
842 printk(KERN_DEBUG "smb_current_kmalloced: %d\n",smb_current_kmalloced);
843 printk(KERN_DEBUG "smb_current_vmalloced: %d\n",smb_current_vmalloced);
844#endif
845}
846
847module_init(init_smb_fs)
848module_exit(exit_smb_fs)
849MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 03:55:43 -0500