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1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_acl.h"
21 #include "xfs_bit.h"
22 #include "xfs_log.h"
23 #include "xfs_inum.h"
24 #include "xfs_trans.h"
25 #include "xfs_sb.h"
26 #include "xfs_ag.h"
27 #include "xfs_dir2.h"
28 #include "xfs_alloc.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_quota.h"
31 #include "xfs_mount.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_dir2_sf.h"
36 #include "xfs_attr_sf.h"
37 #include "xfs_dinode.h"
38 #include "xfs_inode.h"
39 #include "xfs_bmap.h"
40 #include "xfs_btree.h"
41 #include "xfs_ialloc.h"
42 #include "xfs_rtalloc.h"
43 #include "xfs_error.h"
44 #include "xfs_itable.h"
45 #include "xfs_rw.h"
46 #include "xfs_attr.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_utils.h"
49 #include "xfs_vnodeops.h"
50 #include "xfs_trace.h"
51
52 #include <linux/capability.h>
53 #include <linux/xattr.h>
54 #include <linux/namei.h>
55 #include <linux/posix_acl.h>
56 #include <linux/security.h>
57 #include <linux/falloc.h>
58 #include <linux/fiemap.h>
59
60 /*
61 * Bring the timestamps in the XFS inode uptodate.
62 *
63 * Used before writing the inode to disk.
64 */
65 void
66 xfs_synchronize_times(
67 xfs_inode_t *ip)
68 {
69 struct inode *inode = VFS_I(ip);
70
71 ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
72 ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
73 ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec;
74 ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec;
75 ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec;
76 ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec;
77 }
78
79 /*
80 * If the linux inode is valid, mark it dirty.
81 * Used when commiting a dirty inode into a transaction so that
82 * the inode will get written back by the linux code
83 */
84 void
85 xfs_mark_inode_dirty_sync(
86 xfs_inode_t *ip)
87 {
88 struct inode *inode = VFS_I(ip);
89
90 if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR)))
91 mark_inode_dirty_sync(inode);
92 }
93
94 /*
95 * Change the requested timestamp in the given inode.
96 * We don't lock across timestamp updates, and we don't log them but
97 * we do record the fact that there is dirty information in core.
98 */
99 void
100 xfs_ichgtime(
101 xfs_inode_t *ip,
102 int flags)
103 {
104 struct inode *inode = VFS_I(ip);
105 timespec_t tv;
106 int sync_it = 0;
107
108 tv = current_fs_time(inode->i_sb);
109
110 if ((flags & XFS_ICHGTIME_MOD) &&
111 !timespec_equal(&inode->i_mtime, &tv)) {
112 inode->i_mtime = tv;
113 sync_it = 1;
114 }
115 if ((flags & XFS_ICHGTIME_CHG) &&
116 !timespec_equal(&inode->i_ctime, &tv)) {
117 inode->i_ctime = tv;
118 sync_it = 1;
119 }
120
121 /*
122 * Update complete - now make sure everyone knows that the inode
123 * is dirty.
124 */
125 if (sync_it)
126 xfs_mark_inode_dirty_sync(ip);
127 }
128
129 /*
130 * Hook in SELinux. This is not quite correct yet, what we really need
131 * here (as we do for default ACLs) is a mechanism by which creation of
132 * these attrs can be journalled at inode creation time (along with the
133 * inode, of course, such that log replay can't cause these to be lost).
134 */
135 STATIC int
136 xfs_init_security(
137 struct inode *inode,
138 struct inode *dir)
139 {
140 struct xfs_inode *ip = XFS_I(inode);
141 size_t length;
142 void *value;
143 unsigned char *name;
144 int error;
145
146 error = security_inode_init_security(inode, dir, (char **)&name,
147 &value, &length);
148 if (error) {
149 if (error == -EOPNOTSUPP)
150 return 0;
151 return -error;
152 }
153
154 error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
155
156 kfree(name);
157 kfree(value);
158 return error;
159 }
160
161 static void
162 xfs_dentry_to_name(
163 struct xfs_name *namep,
164 struct dentry *dentry)
165 {
166 namep->name = dentry->d_name.name;
167 namep->len = dentry->d_name.len;
168 }
169
170 STATIC void
171 xfs_cleanup_inode(
172 struct inode *dir,
173 struct inode *inode,
174 struct dentry *dentry)
175 {
176 struct xfs_name teardown;
177
178 /* Oh, the horror.
179 * If we can't add the ACL or we fail in
180 * xfs_init_security we must back out.
181 * ENOSPC can hit here, among other things.
182 */
183 xfs_dentry_to_name(&teardown, dentry);
184
185 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
186 iput(inode);
187 }
188
189 STATIC int
190 xfs_vn_mknod(
191 struct inode *dir,
192 struct dentry *dentry,
193 int mode,
194 dev_t rdev)
195 {
196 struct inode *inode;
197 struct xfs_inode *ip = NULL;
198 struct posix_acl *default_acl = NULL;
199 struct xfs_name name;
200 int error;
201
202 /*
203 * Irix uses Missed'em'V split, but doesn't want to see
204 * the upper 5 bits of (14bit) major.
205 */
206 if (S_ISCHR(mode) || S_ISBLK(mode)) {
207 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
208 return -EINVAL;
209 rdev = sysv_encode_dev(rdev);
210 } else {
211 rdev = 0;
212 }
213
214 if (IS_POSIXACL(dir)) {
215 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
216 if (IS_ERR(default_acl))
217 return -PTR_ERR(default_acl);
218
219 if (!default_acl)
220 mode &= ~current_umask();
221 }
222
223 xfs_dentry_to_name(&name, dentry);
224 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL);
225 if (unlikely(error))
226 goto out_free_acl;
227
228 inode = VFS_I(ip);
229
230 error = xfs_init_security(inode, dir);
231 if (unlikely(error))
232 goto out_cleanup_inode;
233
234 if (default_acl) {
235 error = -xfs_inherit_acl(inode, default_acl);
236 if (unlikely(error))
237 goto out_cleanup_inode;
238 posix_acl_release(default_acl);
239 }
240
241
242 d_instantiate(dentry, inode);
243 return -error;
244
245 out_cleanup_inode:
246 xfs_cleanup_inode(dir, inode, dentry);
247 out_free_acl:
248 posix_acl_release(default_acl);
249 return -error;
250 }
251
252 STATIC int
253 xfs_vn_create(
254 struct inode *dir,
255 struct dentry *dentry,
256 int mode,
257 struct nameidata *nd)
258 {
259 return xfs_vn_mknod(dir, dentry, mode, 0);
260 }
261
262 STATIC int
263 xfs_vn_mkdir(
264 struct inode *dir,
265 struct dentry *dentry,
266 int mode)
267 {
268 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
269 }
270
271 STATIC struct dentry *
272 xfs_vn_lookup(
273 struct inode *dir,
274 struct dentry *dentry,
275 struct nameidata *nd)
276 {
277 struct xfs_inode *cip;
278 struct xfs_name name;
279 int error;
280
281 if (dentry->d_name.len >= MAXNAMELEN)
282 return ERR_PTR(-ENAMETOOLONG);
283
284 xfs_dentry_to_name(&name, dentry);
285 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
286 if (unlikely(error)) {
287 if (unlikely(error != ENOENT))
288 return ERR_PTR(-error);
289 d_add(dentry, NULL);
290 return NULL;
291 }
292
293 return d_splice_alias(VFS_I(cip), dentry);
294 }
295
296 STATIC struct dentry *
297 xfs_vn_ci_lookup(
298 struct inode *dir,
299 struct dentry *dentry,
300 struct nameidata *nd)
301 {
302 struct xfs_inode *ip;
303 struct xfs_name xname;
304 struct xfs_name ci_name;
305 struct qstr dname;
306 int error;
307
308 if (dentry->d_name.len >= MAXNAMELEN)
309 return ERR_PTR(-ENAMETOOLONG);
310
311 xfs_dentry_to_name(&xname, dentry);
312 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
313 if (unlikely(error)) {
314 if (unlikely(error != ENOENT))
315 return ERR_PTR(-error);
316 /*
317 * call d_add(dentry, NULL) here when d_drop_negative_children
318 * is called in xfs_vn_mknod (ie. allow negative dentries
319 * with CI filesystems).
320 */
321 return NULL;
322 }
323
324 /* if exact match, just splice and exit */
325 if (!ci_name.name)
326 return d_splice_alias(VFS_I(ip), dentry);
327
328 /* else case-insensitive match... */
329 dname.name = ci_name.name;
330 dname.len = ci_name.len;
331 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
332 kmem_free(ci_name.name);
333 return dentry;
334 }
335
336 STATIC int
337 xfs_vn_link(
338 struct dentry *old_dentry,
339 struct inode *dir,
340 struct dentry *dentry)
341 {
342 struct inode *inode = old_dentry->d_inode;
343 struct xfs_name name;
344 int error;
345
346 xfs_dentry_to_name(&name, dentry);
347
348 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
349 if (unlikely(error))
350 return -error;
351
352 atomic_inc(&inode->i_count);
353 d_instantiate(dentry, inode);
354 return 0;
355 }
356
357 STATIC int
358 xfs_vn_unlink(
359 struct inode *dir,
360 struct dentry *dentry)
361 {
362 struct xfs_name name;
363 int error;
364
365 xfs_dentry_to_name(&name, dentry);
366
367 error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
368 if (error)
369 return error;
370
371 /*
372 * With unlink, the VFS makes the dentry "negative": no inode,
373 * but still hashed. This is incompatible with case-insensitive
374 * mode, so invalidate (unhash) the dentry in CI-mode.
375 */
376 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
377 d_invalidate(dentry);
378 return 0;
379 }
380
381 STATIC int
382 xfs_vn_symlink(
383 struct inode *dir,
384 struct dentry *dentry,
385 const char *symname)
386 {
387 struct inode *inode;
388 struct xfs_inode *cip = NULL;
389 struct xfs_name name;
390 int error;
391 mode_t mode;
392
393 mode = S_IFLNK |
394 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
395 xfs_dentry_to_name(&name, dentry);
396
397 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL);
398 if (unlikely(error))
399 goto out;
400
401 inode = VFS_I(cip);
402
403 error = xfs_init_security(inode, dir);
404 if (unlikely(error))
405 goto out_cleanup_inode;
406
407 d_instantiate(dentry, inode);
408 return 0;
409
410 out_cleanup_inode:
411 xfs_cleanup_inode(dir, inode, dentry);
412 out:
413 return -error;
414 }
415
416 STATIC int
417 xfs_vn_rename(
418 struct inode *odir,
419 struct dentry *odentry,
420 struct inode *ndir,
421 struct dentry *ndentry)
422 {
423 struct inode *new_inode = ndentry->d_inode;
424 struct xfs_name oname;
425 struct xfs_name nname;
426
427 xfs_dentry_to_name(&oname, odentry);
428 xfs_dentry_to_name(&nname, ndentry);
429
430 return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
431 XFS_I(ndir), &nname, new_inode ?
432 XFS_I(new_inode) : NULL);
433 }
434
435 /*
436 * careful here - this function can get called recursively, so
437 * we need to be very careful about how much stack we use.
438 * uio is kmalloced for this reason...
439 */
440 STATIC void *
441 xfs_vn_follow_link(
442 struct dentry *dentry,
443 struct nameidata *nd)
444 {
445 char *link;
446 int error = -ENOMEM;
447
448 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
449 if (!link)
450 goto out_err;
451
452 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
453 if (unlikely(error))
454 goto out_kfree;
455
456 nd_set_link(nd, link);
457 return NULL;
458
459 out_kfree:
460 kfree(link);
461 out_err:
462 nd_set_link(nd, ERR_PTR(error));
463 return NULL;
464 }
465
466 STATIC void
467 xfs_vn_put_link(
468 struct dentry *dentry,
469 struct nameidata *nd,
470 void *p)
471 {
472 char *s = nd_get_link(nd);
473
474 if (!IS_ERR(s))
475 kfree(s);
476 }
477
478 STATIC int
479 xfs_vn_getattr(
480 struct vfsmount *mnt,
481 struct dentry *dentry,
482 struct kstat *stat)
483 {
484 struct inode *inode = dentry->d_inode;
485 struct xfs_inode *ip = XFS_I(inode);
486 struct xfs_mount *mp = ip->i_mount;
487
488 xfs_itrace_entry(ip);
489
490 if (XFS_FORCED_SHUTDOWN(mp))
491 return XFS_ERROR(EIO);
492
493 stat->size = XFS_ISIZE(ip);
494 stat->dev = inode->i_sb->s_dev;
495 stat->mode = ip->i_d.di_mode;
496 stat->nlink = ip->i_d.di_nlink;
497 stat->uid = ip->i_d.di_uid;
498 stat->gid = ip->i_d.di_gid;
499 stat->ino = ip->i_ino;
500 stat->atime = inode->i_atime;
501 stat->mtime = inode->i_mtime;
502 stat->ctime = inode->i_ctime;
503 stat->blocks =
504 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
505
506
507 switch (inode->i_mode & S_IFMT) {
508 case S_IFBLK:
509 case S_IFCHR:
510 stat->blksize = BLKDEV_IOSIZE;
511 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
512 sysv_minor(ip->i_df.if_u2.if_rdev));
513 break;
514 default:
515 if (XFS_IS_REALTIME_INODE(ip)) {
516 /*
517 * If the file blocks are being allocated from a
518 * realtime volume, then return the inode's realtime
519 * extent size or the realtime volume's extent size.
520 */
521 stat->blksize =
522 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
523 } else
524 stat->blksize = xfs_preferred_iosize(mp);
525 stat->rdev = 0;
526 break;
527 }
528
529 return 0;
530 }
531
532 STATIC int
533 xfs_vn_setattr(
534 struct dentry *dentry,
535 struct iattr *iattr)
536 {
537 return -xfs_setattr(XFS_I(dentry->d_inode), iattr, 0);
538 }
539
540 /*
541 * block_truncate_page can return an error, but we can't propagate it
542 * at all here. Leave a complaint + stack trace in the syslog because
543 * this could be bad. If it is bad, we need to propagate the error further.
544 */
545 STATIC void
546 xfs_vn_truncate(
547 struct inode *inode)
548 {
549 int error;
550 error = block_truncate_page(inode->i_mapping, inode->i_size,
551 xfs_get_blocks);
552 WARN_ON(error);
553 }
554
555 STATIC long
556 xfs_vn_fallocate(
557 struct inode *inode,
558 int mode,
559 loff_t offset,
560 loff_t len)
561 {
562 long error;
563 loff_t new_size = 0;
564 xfs_flock64_t bf;
565 xfs_inode_t *ip = XFS_I(inode);
566
567 /* preallocation on directories not yet supported */
568 error = -ENODEV;
569 if (S_ISDIR(inode->i_mode))
570 goto out_error;
571
572 bf.l_whence = 0;
573 bf.l_start = offset;
574 bf.l_len = len;
575
576 xfs_ilock(ip, XFS_IOLOCK_EXCL);
577 error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
578 0, XFS_ATTR_NOLOCK);
579 if (!error && !(mode & FALLOC_FL_KEEP_SIZE) &&
580 offset + len > i_size_read(inode))
581 new_size = offset + len;
582
583 /* Change file size if needed */
584 if (new_size) {
585 struct iattr iattr;
586
587 iattr.ia_valid = ATTR_SIZE;
588 iattr.ia_size = new_size;
589 error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK);
590 }
591
592 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
593 out_error:
594 return error;
595 }
596
597 #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
598
599 /*
600 * Call fiemap helper to fill in user data.
601 * Returns positive errors to xfs_getbmap.
602 */
603 STATIC int
604 xfs_fiemap_format(
605 void **arg,
606 struct getbmapx *bmv,
607 int *full)
608 {
609 int error;
610 struct fiemap_extent_info *fieinfo = *arg;
611 u32 fiemap_flags = 0;
612 u64 logical, physical, length;
613
614 /* Do nothing for a hole */
615 if (bmv->bmv_block == -1LL)
616 return 0;
617
618 logical = BBTOB(bmv->bmv_offset);
619 physical = BBTOB(bmv->bmv_block);
620 length = BBTOB(bmv->bmv_length);
621
622 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
623 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
624 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
625 fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
626 physical = 0; /* no block yet */
627 }
628 if (bmv->bmv_oflags & BMV_OF_LAST)
629 fiemap_flags |= FIEMAP_EXTENT_LAST;
630
631 error = fiemap_fill_next_extent(fieinfo, logical, physical,
632 length, fiemap_flags);
633 if (error > 0) {
634 error = 0;
635 *full = 1; /* user array now full */
636 }
637
638 return -error;
639 }
640
641 STATIC int
642 xfs_vn_fiemap(
643 struct inode *inode,
644 struct fiemap_extent_info *fieinfo,
645 u64 start,
646 u64 length)
647 {
648 xfs_inode_t *ip = XFS_I(inode);
649 struct getbmapx bm;
650 int error;
651
652 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
653 if (error)
654 return error;
655
656 /* Set up bmap header for xfs internal routine */
657 bm.bmv_offset = BTOBB(start);
658 /* Special case for whole file */
659 if (length == FIEMAP_MAX_OFFSET)
660 bm.bmv_length = -1LL;
661 else
662 bm.bmv_length = BTOBB(length);
663
664 /* We add one because in getbmap world count includes the header */
665 bm.bmv_count = fieinfo->fi_extents_max + 1;
666 bm.bmv_iflags = BMV_IF_PREALLOC;
667 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
668 bm.bmv_iflags |= BMV_IF_ATTRFORK;
669 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
670 bm.bmv_iflags |= BMV_IF_DELALLOC;
671
672 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
673 if (error)
674 return -error;
675
676 return 0;
677 }
678
679 static const struct inode_operations xfs_inode_operations = {
680 .check_acl = xfs_check_acl,
681 .truncate = xfs_vn_truncate,
682 .getattr = xfs_vn_getattr,
683 .setattr = xfs_vn_setattr,
684 .setxattr = generic_setxattr,
685 .getxattr = generic_getxattr,
686 .removexattr = generic_removexattr,
687 .listxattr = xfs_vn_listxattr,
688 .fallocate = xfs_vn_fallocate,
689 .fiemap = xfs_vn_fiemap,
690 };
691
692 static const struct inode_operations xfs_dir_inode_operations = {
693 .create = xfs_vn_create,
694 .lookup = xfs_vn_lookup,
695 .link = xfs_vn_link,
696 .unlink = xfs_vn_unlink,
697 .symlink = xfs_vn_symlink,
698 .mkdir = xfs_vn_mkdir,
699 /*
700 * Yes, XFS uses the same method for rmdir and unlink.
701 *
702 * There are some subtile differences deeper in the code,
703 * but we use S_ISDIR to check for those.
704 */
705 .rmdir = xfs_vn_unlink,
706 .mknod = xfs_vn_mknod,
707 .rename = xfs_vn_rename,
708 .check_acl = xfs_check_acl,
709 .getattr = xfs_vn_getattr,
710 .setattr = xfs_vn_setattr,
711 .setxattr = generic_setxattr,
712 .getxattr = generic_getxattr,
713 .removexattr = generic_removexattr,
714 .listxattr = xfs_vn_listxattr,
715 };
716
717 static const struct inode_operations xfs_dir_ci_inode_operations = {
718 .create = xfs_vn_create,
719 .lookup = xfs_vn_ci_lookup,
720 .link = xfs_vn_link,
721 .unlink = xfs_vn_unlink,
722 .symlink = xfs_vn_symlink,
723 .mkdir = xfs_vn_mkdir,
724 /*
725 * Yes, XFS uses the same method for rmdir and unlink.
726 *
727 * There are some subtile differences deeper in the code,
728 * but we use S_ISDIR to check for those.
729 */
730 .rmdir = xfs_vn_unlink,
731 .mknod = xfs_vn_mknod,
732 .rename = xfs_vn_rename,
733 .check_acl = xfs_check_acl,
734 .getattr = xfs_vn_getattr,
735 .setattr = xfs_vn_setattr,
736 .setxattr = generic_setxattr,
737 .getxattr = generic_getxattr,
738 .removexattr = generic_removexattr,
739 .listxattr = xfs_vn_listxattr,
740 };
741
742 static const struct inode_operations xfs_symlink_inode_operations = {
743 .readlink = generic_readlink,
744 .follow_link = xfs_vn_follow_link,
745 .put_link = xfs_vn_put_link,
746 .check_acl = xfs_check_acl,
747 .getattr = xfs_vn_getattr,
748 .setattr = xfs_vn_setattr,
749 .setxattr = generic_setxattr,
750 .getxattr = generic_getxattr,
751 .removexattr = generic_removexattr,
752 .listxattr = xfs_vn_listxattr,
753 };
754
755 STATIC void
756 xfs_diflags_to_iflags(
757 struct inode *inode,
758 struct xfs_inode *ip)
759 {
760 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
761 inode->i_flags |= S_IMMUTABLE;
762 else
763 inode->i_flags &= ~S_IMMUTABLE;
764 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
765 inode->i_flags |= S_APPEND;
766 else
767 inode->i_flags &= ~S_APPEND;
768 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
769 inode->i_flags |= S_SYNC;
770 else
771 inode->i_flags &= ~S_SYNC;
772 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
773 inode->i_flags |= S_NOATIME;
774 else
775 inode->i_flags &= ~S_NOATIME;
776 }
777
778 /*
779 * Initialize the Linux inode, set up the operation vectors and
780 * unlock the inode.
781 *
782 * When reading existing inodes from disk this is called directly
783 * from xfs_iget, when creating a new inode it is called from
784 * xfs_ialloc after setting up the inode.
785 *
786 * We are always called with an uninitialised linux inode here.
787 * We need to initialise the necessary fields and take a reference
788 * on it.
789 */
790 void
791 xfs_setup_inode(
792 struct xfs_inode *ip)
793 {
794 struct inode *inode = &ip->i_vnode;
795
796 inode->i_ino = ip->i_ino;
797 inode->i_state = I_NEW;
798 inode_add_to_lists(ip->i_mount->m_super, inode);
799
800 inode->i_mode = ip->i_d.di_mode;
801 inode->i_nlink = ip->i_d.di_nlink;
802 inode->i_uid = ip->i_d.di_uid;
803 inode->i_gid = ip->i_d.di_gid;
804
805 switch (inode->i_mode & S_IFMT) {
806 case S_IFBLK:
807 case S_IFCHR:
808 inode->i_rdev =
809 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
810 sysv_minor(ip->i_df.if_u2.if_rdev));
811 break;
812 default:
813 inode->i_rdev = 0;
814 break;
815 }
816
817 inode->i_generation = ip->i_d.di_gen;
818 i_size_write(inode, ip->i_d.di_size);
819 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
820 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
821 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
822 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
823 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
824 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
825 xfs_diflags_to_iflags(inode, ip);
826
827 switch (inode->i_mode & S_IFMT) {
828 case S_IFREG:
829 inode->i_op = &xfs_inode_operations;
830 inode->i_fop = &xfs_file_operations;
831 inode->i_mapping->a_ops = &xfs_address_space_operations;
832 break;
833 case S_IFDIR:
834 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
835 inode->i_op = &xfs_dir_ci_inode_operations;
836 else
837 inode->i_op = &xfs_dir_inode_operations;
838 inode->i_fop = &xfs_dir_file_operations;
839 break;
840 case S_IFLNK:
841 inode->i_op = &xfs_symlink_inode_operations;
842 if (!(ip->i_df.if_flags & XFS_IFINLINE))
843 inode->i_mapping->a_ops = &xfs_address_space_operations;
844 break;
845 default:
846 inode->i_op = &xfs_inode_operations;
847 init_special_inode(inode, inode->i_mode, inode->i_rdev);
848 break;
849 }
850
851 xfs_iflags_clear(ip, XFS_INEW);
852 barrier();
853
854 unlock_new_inode(inode);
855 }