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[XFS] Merge xfs_rmdir into xfs_remove
[linux-2.6-block.git] / fs / xfs / linux-2.6 / xfs_iops.c
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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_bit.h"
21#include "xfs_log.h"
22#include "xfs_inum.h"
23#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_dir2.h"
27#include "xfs_alloc.h"
28#include "xfs_dmapi.h"
29#include "xfs_quota.h"
30#include "xfs_mount.h"
31#include "xfs_bmap_btree.h"
32#include "xfs_alloc_btree.h"
33#include "xfs_ialloc_btree.h"
34#include "xfs_dir2_sf.h"
35#include "xfs_attr_sf.h"
36#include "xfs_dinode.h"
37#include "xfs_inode.h"
38#include "xfs_bmap.h"
39#include "xfs_btree.h"
40#include "xfs_ialloc.h"
41#include "xfs_rtalloc.h"
42#include "xfs_error.h"
43#include "xfs_itable.h"
44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_attr.h"
47#include "xfs_buf_item.h"
48#include "xfs_utils.h"
49#include "xfs_vnodeops.h"
50
51#include <linux/capability.h>
52#include <linux/xattr.h>
53#include <linux/namei.h>
54#include <linux/security.h>
55#include <linux/falloc.h>
56
57/*
58 * Bring the atime in the XFS inode uptodate.
59 * Used before logging the inode to disk or when the Linux inode goes away.
60 */
61void
62xfs_synchronize_atime(
63 xfs_inode_t *ip)
64{
65 struct inode *inode = ip->i_vnode;
66
67 if (inode) {
68 ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
69 ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
70 }
71}
72
73/*
74 * If the linux inode exists, mark it dirty.
75 * Used when commiting a dirty inode into a transaction so that
76 * the inode will get written back by the linux code
77 */
78void
79xfs_mark_inode_dirty_sync(
80 xfs_inode_t *ip)
81{
82 struct inode *inode = ip->i_vnode;
83
84 if (inode)
85 mark_inode_dirty_sync(inode);
86}
87
88/*
89 * Change the requested timestamp in the given inode.
90 * We don't lock across timestamp updates, and we don't log them but
91 * we do record the fact that there is dirty information in core.
92 *
93 * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
94 * with XFS_ICHGTIME_ACC to be sure that access time
95 * update will take. Calling first with XFS_ICHGTIME_ACC
96 * and then XFS_ICHGTIME_MOD may fail to modify the access
97 * timestamp if the filesystem is mounted noacctm.
98 */
99void
100xfs_ichgtime(
101 xfs_inode_t *ip,
102 int flags)
103{
104 struct inode *inode = vn_to_inode(XFS_ITOV(ip));
105 timespec_t tv;
106
107 nanotime(&tv);
108 if (flags & XFS_ICHGTIME_MOD) {
109 inode->i_mtime = tv;
110 ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
111 ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
112 }
113 if (flags & XFS_ICHGTIME_ACC) {
114 inode->i_atime = tv;
115 ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
116 ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
117 }
118 if (flags & XFS_ICHGTIME_CHG) {
119 inode->i_ctime = tv;
120 ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
121 ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
122 }
123
124 /*
125 * We update the i_update_core field _after_ changing
126 * the timestamps in order to coordinate properly with
127 * xfs_iflush() so that we don't lose timestamp updates.
128 * This keeps us from having to hold the inode lock
129 * while doing this. We use the SYNCHRONIZE macro to
130 * ensure that the compiler does not reorder the update
131 * of i_update_core above the timestamp updates above.
132 */
133 SYNCHRONIZE();
134 ip->i_update_core = 1;
135 if (!(inode->i_state & I_NEW))
136 mark_inode_dirty_sync(inode);
137}
138
139/*
140 * Variant on the above which avoids querying the system clock
141 * in situations where we know the Linux inode timestamps have
142 * just been updated (and so we can update our inode cheaply).
143 */
144void
145xfs_ichgtime_fast(
146 xfs_inode_t *ip,
147 struct inode *inode,
148 int flags)
149{
150 timespec_t *tvp;
151
152 /*
153 * Atime updates for read() & friends are handled lazily now, and
154 * explicit updates must go through xfs_ichgtime()
155 */
156 ASSERT((flags & XFS_ICHGTIME_ACC) == 0);
157
158 if (flags & XFS_ICHGTIME_MOD) {
159 tvp = &inode->i_mtime;
160 ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
161 ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
162 }
163 if (flags & XFS_ICHGTIME_CHG) {
164 tvp = &inode->i_ctime;
165 ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;
166 ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec;
167 }
168
169 /*
170 * We update the i_update_core field _after_ changing
171 * the timestamps in order to coordinate properly with
172 * xfs_iflush() so that we don't lose timestamp updates.
173 * This keeps us from having to hold the inode lock
174 * while doing this. We use the SYNCHRONIZE macro to
175 * ensure that the compiler does not reorder the update
176 * of i_update_core above the timestamp updates above.
177 */
178 SYNCHRONIZE();
179 ip->i_update_core = 1;
180 if (!(inode->i_state & I_NEW))
181 mark_inode_dirty_sync(inode);
182}
183
184
185/*
186 * Pull the link count and size up from the xfs inode to the linux inode
187 */
188STATIC void
189xfs_validate_fields(
190 struct inode *inode)
191{
192 struct xfs_inode *ip = XFS_I(inode);
193 loff_t size;
194
195 /* we're under i_sem so i_size can't change under us */
196 size = XFS_ISIZE(ip);
197 if (i_size_read(inode) != size)
198 i_size_write(inode, size);
199}
200
201/*
202 * Hook in SELinux. This is not quite correct yet, what we really need
203 * here (as we do for default ACLs) is a mechanism by which creation of
204 * these attrs can be journalled at inode creation time (along with the
205 * inode, of course, such that log replay can't cause these to be lost).
206 */
207STATIC int
208xfs_init_security(
209 struct inode *inode,
210 struct inode *dir)
211{
212 struct xfs_inode *ip = XFS_I(inode);
213 size_t length;
214 void *value;
215 char *name;
216 int error;
217
218 error = security_inode_init_security(inode, dir, &name,
219 &value, &length);
220 if (error) {
221 if (error == -EOPNOTSUPP)
222 return 0;
223 return -error;
224 }
225
226 error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
227 if (!error)
228 xfs_iflags_set(ip, XFS_IMODIFIED);
229
230 kfree(name);
231 kfree(value);
232 return error;
233}
234
235static void
236xfs_dentry_to_name(
237 struct xfs_name *namep,
238 struct dentry *dentry)
239{
240 namep->name = dentry->d_name.name;
241 namep->len = dentry->d_name.len;
242}
243
244STATIC void
245xfs_cleanup_inode(
246 struct inode *dir,
247 struct inode *inode,
248 struct dentry *dentry)
249{
250 struct xfs_name teardown;
251
252 /* Oh, the horror.
253 * If we can't add the ACL or we fail in
254 * xfs_init_security we must back out.
255 * ENOSPC can hit here, among other things.
256 */
257 xfs_dentry_to_name(&teardown, dentry);
258
259 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
260 iput(inode);
261}
262
263STATIC int
264xfs_vn_mknod(
265 struct inode *dir,
266 struct dentry *dentry,
267 int mode,
268 dev_t rdev)
269{
270 struct inode *inode;
271 struct xfs_inode *ip = NULL;
272 xfs_acl_t *default_acl = NULL;
273 struct xfs_name name;
274 int (*test_default_acl)(struct inode *) = _ACL_DEFAULT_EXISTS;
275 int error;
276
277 /*
278 * Irix uses Missed'em'V split, but doesn't want to see
279 * the upper 5 bits of (14bit) major.
280 */
281 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
282 return -EINVAL;
283
284 if (test_default_acl && test_default_acl(dir)) {
285 if (!_ACL_ALLOC(default_acl)) {
286 return -ENOMEM;
287 }
288 if (!_ACL_GET_DEFAULT(dir, default_acl)) {
289 _ACL_FREE(default_acl);
290 default_acl = NULL;
291 }
292 }
293
294 xfs_dentry_to_name(&name, dentry);
295
296 if (IS_POSIXACL(dir) && !default_acl)
297 mode &= ~current->fs->umask;
298
299 switch (mode & S_IFMT) {
300 case S_IFCHR:
301 case S_IFBLK:
302 case S_IFIFO:
303 case S_IFSOCK:
304 rdev = sysv_encode_dev(rdev);
305 case S_IFREG:
306 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL);
307 break;
308 case S_IFDIR:
309 error = xfs_mkdir(XFS_I(dir), &name, mode, &ip, NULL);
310 break;
311 default:
312 error = EINVAL;
313 break;
314 }
315
316 if (unlikely(error))
317 goto out_free_acl;
318
319 inode = ip->i_vnode;
320
321 error = xfs_init_security(inode, dir);
322 if (unlikely(error))
323 goto out_cleanup_inode;
324
325 if (default_acl) {
326 error = _ACL_INHERIT(inode, mode, default_acl);
327 if (unlikely(error))
328 goto out_cleanup_inode;
329 xfs_iflags_set(ip, XFS_IMODIFIED);
330 _ACL_FREE(default_acl);
331 }
332
333
334 if (S_ISDIR(mode))
335 xfs_validate_fields(inode);
336 d_instantiate(dentry, inode);
337 xfs_validate_fields(dir);
338 return -error;
339
340 out_cleanup_inode:
341 xfs_cleanup_inode(dir, inode, dentry);
342 out_free_acl:
343 if (default_acl)
344 _ACL_FREE(default_acl);
345 return -error;
346}
347
348STATIC int
349xfs_vn_create(
350 struct inode *dir,
351 struct dentry *dentry,
352 int mode,
353 struct nameidata *nd)
354{
355 return xfs_vn_mknod(dir, dentry, mode, 0);
356}
357
358STATIC int
359xfs_vn_mkdir(
360 struct inode *dir,
361 struct dentry *dentry,
362 int mode)
363{
364 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
365}
366
367STATIC struct dentry *
368xfs_vn_lookup(
369 struct inode *dir,
370 struct dentry *dentry,
371 struct nameidata *nd)
372{
373 struct xfs_inode *cip;
374 struct xfs_name name;
375 int error;
376
377 if (dentry->d_name.len >= MAXNAMELEN)
378 return ERR_PTR(-ENAMETOOLONG);
379
380 xfs_dentry_to_name(&name, dentry);
381 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
382 if (unlikely(error)) {
383 if (unlikely(error != ENOENT))
384 return ERR_PTR(-error);
385 d_add(dentry, NULL);
386 return NULL;
387 }
388
389 return d_splice_alias(cip->i_vnode, dentry);
390}
391
392STATIC struct dentry *
393xfs_vn_ci_lookup(
394 struct inode *dir,
395 struct dentry *dentry,
396 struct nameidata *nd)
397{
398 struct xfs_inode *ip;
399 struct xfs_name xname;
400 struct xfs_name ci_name;
401 struct qstr dname;
402 int error;
403
404 if (dentry->d_name.len >= MAXNAMELEN)
405 return ERR_PTR(-ENAMETOOLONG);
406
407 xfs_dentry_to_name(&xname, dentry);
408 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
409 if (unlikely(error)) {
410 if (unlikely(error != ENOENT))
411 return ERR_PTR(-error);
412 /*
413 * call d_add(dentry, NULL) here when d_drop_negative_children
414 * is called in xfs_vn_mknod (ie. allow negative dentries
415 * with CI filesystems).
416 */
417 return NULL;
418 }
419
420 /* if exact match, just splice and exit */
421 if (!ci_name.name)
422 return d_splice_alias(ip->i_vnode, dentry);
423
424 /* else case-insensitive match... */
425 dname.name = ci_name.name;
426 dname.len = ci_name.len;
427 dentry = d_add_ci(ip->i_vnode, dentry, &dname);
428 kmem_free(ci_name.name);
429 return dentry;
430}
431
432STATIC int
433xfs_vn_link(
434 struct dentry *old_dentry,
435 struct inode *dir,
436 struct dentry *dentry)
437{
438 struct inode *inode; /* inode of guy being linked to */
439 struct xfs_name name;
440 int error;
441
442 inode = old_dentry->d_inode;
443 xfs_dentry_to_name(&name, dentry);
444
445 igrab(inode);
446 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
447 if (unlikely(error)) {
448 iput(inode);
449 return -error;
450 }
451
452 xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
453 xfs_validate_fields(inode);
454 d_instantiate(dentry, inode);
455 return 0;
456}
457
458STATIC int
459xfs_vn_unlink(
460 struct inode *dir,
461 struct dentry *dentry)
462{
463 struct inode *inode;
464 struct xfs_name name;
465 int error;
466
467 inode = dentry->d_inode;
468 xfs_dentry_to_name(&name, dentry);
469
470 error = xfs_remove(XFS_I(dir), &name, XFS_I(inode));
471 if (likely(!error)) {
472 xfs_validate_fields(dir); /* size needs update */
473 xfs_validate_fields(inode);
474 /*
475 * With unlink, the VFS makes the dentry "negative": no inode,
476 * but still hashed. This is incompatible with case-insensitive
477 * mode, so invalidate (unhash) the dentry in CI-mode.
478 */
479 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
480 d_invalidate(dentry);
481 }
482 return -error;
483}
484
485STATIC int
486xfs_vn_symlink(
487 struct inode *dir,
488 struct dentry *dentry,
489 const char *symname)
490{
491 struct inode *inode;
492 struct xfs_inode *cip = NULL;
493 struct xfs_name name;
494 int error;
495 mode_t mode;
496
497 mode = S_IFLNK |
498 (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
499 xfs_dentry_to_name(&name, dentry);
500
501 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL);
502 if (unlikely(error))
503 goto out;
504
505 inode = cip->i_vnode;
506
507 error = xfs_init_security(inode, dir);
508 if (unlikely(error))
509 goto out_cleanup_inode;
510
511 d_instantiate(dentry, inode);
512 xfs_validate_fields(dir);
513 xfs_validate_fields(inode);
514 return 0;
515
516 out_cleanup_inode:
517 xfs_cleanup_inode(dir, inode, dentry);
518 out:
519 return -error;
520}
521
522STATIC int
523xfs_vn_rename(
524 struct inode *odir,
525 struct dentry *odentry,
526 struct inode *ndir,
527 struct dentry *ndentry)
528{
529 struct inode *new_inode = ndentry->d_inode;
530 struct xfs_name oname;
531 struct xfs_name nname;
532 int error;
533
534 xfs_dentry_to_name(&oname, odentry);
535 xfs_dentry_to_name(&nname, ndentry);
536
537 error = xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
538 XFS_I(ndir), &nname, new_inode ?
539 XFS_I(new_inode) : NULL);
540 if (likely(!error)) {
541 if (new_inode)
542 xfs_validate_fields(new_inode);
543 xfs_validate_fields(odir);
544 if (ndir != odir)
545 xfs_validate_fields(ndir);
546 }
547 return -error;
548}
549
550/*
551 * careful here - this function can get called recursively, so
552 * we need to be very careful about how much stack we use.
553 * uio is kmalloced for this reason...
554 */
555STATIC void *
556xfs_vn_follow_link(
557 struct dentry *dentry,
558 struct nameidata *nd)
559{
560 char *link;
561 int error = -ENOMEM;
562
563 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
564 if (!link)
565 goto out_err;
566
567 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
568 if (unlikely(error))
569 goto out_kfree;
570
571 nd_set_link(nd, link);
572 return NULL;
573
574 out_kfree:
575 kfree(link);
576 out_err:
577 nd_set_link(nd, ERR_PTR(error));
578 return NULL;
579}
580
581STATIC void
582xfs_vn_put_link(
583 struct dentry *dentry,
584 struct nameidata *nd,
585 void *p)
586{
587 char *s = nd_get_link(nd);
588
589 if (!IS_ERR(s))
590 kfree(s);
591}
592
593#ifdef CONFIG_XFS_POSIX_ACL
594STATIC int
595xfs_check_acl(
596 struct inode *inode,
597 int mask)
598{
599 struct xfs_inode *ip = XFS_I(inode);
600 int error;
601
602 xfs_itrace_entry(ip);
603
604 if (XFS_IFORK_Q(ip)) {
605 error = xfs_acl_iaccess(ip, mask, NULL);
606 if (error != -1)
607 return -error;
608 }
609
610 return -EAGAIN;
611}
612
613STATIC int
614xfs_vn_permission(
615 struct inode *inode,
616 int mask)
617{
618 return generic_permission(inode, mask, xfs_check_acl);
619}
620#else
621#define xfs_vn_permission NULL
622#endif
623
624STATIC int
625xfs_vn_getattr(
626 struct vfsmount *mnt,
627 struct dentry *dentry,
628 struct kstat *stat)
629{
630 struct inode *inode = dentry->d_inode;
631 struct xfs_inode *ip = XFS_I(inode);
632 struct xfs_mount *mp = ip->i_mount;
633
634 xfs_itrace_entry(ip);
635
636 if (XFS_FORCED_SHUTDOWN(mp))
637 return XFS_ERROR(EIO);
638
639 stat->size = XFS_ISIZE(ip);
640 stat->dev = inode->i_sb->s_dev;
641 stat->mode = ip->i_d.di_mode;
642 stat->nlink = ip->i_d.di_nlink;
643 stat->uid = ip->i_d.di_uid;
644 stat->gid = ip->i_d.di_gid;
645 stat->ino = ip->i_ino;
646#if XFS_BIG_INUMS
647 stat->ino += mp->m_inoadd;
648#endif
649 stat->atime = inode->i_atime;
650 stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec;
651 stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
652 stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec;
653 stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
654 stat->blocks =
655 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
656
657
658 switch (inode->i_mode & S_IFMT) {
659 case S_IFBLK:
660 case S_IFCHR:
661 stat->blksize = BLKDEV_IOSIZE;
662 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
663 sysv_minor(ip->i_df.if_u2.if_rdev));
664 break;
665 default:
666 if (XFS_IS_REALTIME_INODE(ip)) {
667 /*
668 * If the file blocks are being allocated from a
669 * realtime volume, then return the inode's realtime
670 * extent size or the realtime volume's extent size.
671 */
672 stat->blksize =
673 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
674 } else
675 stat->blksize = xfs_preferred_iosize(mp);
676 stat->rdev = 0;
677 break;
678 }
679
680 return 0;
681}
682
683STATIC int
684xfs_vn_setattr(
685 struct dentry *dentry,
686 struct iattr *attr)
687{
688 struct inode *inode = dentry->d_inode;
689 unsigned int ia_valid = attr->ia_valid;
690 bhv_vattr_t vattr = { 0 };
691 int flags = 0;
692 int error;
693
694 if (ia_valid & ATTR_UID) {
695 vattr.va_mask |= XFS_AT_UID;
696 vattr.va_uid = attr->ia_uid;
697 }
698 if (ia_valid & ATTR_GID) {
699 vattr.va_mask |= XFS_AT_GID;
700 vattr.va_gid = attr->ia_gid;
701 }
702 if (ia_valid & ATTR_SIZE) {
703 vattr.va_mask |= XFS_AT_SIZE;
704 vattr.va_size = attr->ia_size;
705 }
706 if (ia_valid & ATTR_ATIME) {
707 vattr.va_mask |= XFS_AT_ATIME;
708 vattr.va_atime = attr->ia_atime;
709 inode->i_atime = attr->ia_atime;
710 }
711 if (ia_valid & ATTR_MTIME) {
712 vattr.va_mask |= XFS_AT_MTIME;
713 vattr.va_mtime = attr->ia_mtime;
714 }
715 if (ia_valid & ATTR_CTIME) {
716 vattr.va_mask |= XFS_AT_CTIME;
717 vattr.va_ctime = attr->ia_ctime;
718 }
719 if (ia_valid & ATTR_MODE) {
720 vattr.va_mask |= XFS_AT_MODE;
721 vattr.va_mode = attr->ia_mode;
722 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
723 inode->i_mode &= ~S_ISGID;
724 }
725
726 if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
727 flags |= ATTR_UTIME;
728#ifdef ATTR_NO_BLOCK
729 if ((ia_valid & ATTR_NO_BLOCK))
730 flags |= ATTR_NONBLOCK;
731#endif
732
733 error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL);
734 if (likely(!error))
735 vn_revalidate(vn_from_inode(inode));
736 return -error;
737}
738
739/*
740 * block_truncate_page can return an error, but we can't propagate it
741 * at all here. Leave a complaint + stack trace in the syslog because
742 * this could be bad. If it is bad, we need to propagate the error further.
743 */
744STATIC void
745xfs_vn_truncate(
746 struct inode *inode)
747{
748 int error;
749 error = block_truncate_page(inode->i_mapping, inode->i_size,
750 xfs_get_blocks);
751 WARN_ON(error);
752}
753
754STATIC long
755xfs_vn_fallocate(
756 struct inode *inode,
757 int mode,
758 loff_t offset,
759 loff_t len)
760{
761 long error;
762 loff_t new_size = 0;
763 xfs_flock64_t bf;
764 xfs_inode_t *ip = XFS_I(inode);
765
766 /* preallocation on directories not yet supported */
767 error = -ENODEV;
768 if (S_ISDIR(inode->i_mode))
769 goto out_error;
770
771 bf.l_whence = 0;
772 bf.l_start = offset;
773 bf.l_len = len;
774
775 xfs_ilock(ip, XFS_IOLOCK_EXCL);
776 error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
777 0, NULL, ATTR_NOLOCK);
778 if (!error && !(mode & FALLOC_FL_KEEP_SIZE) &&
779 offset + len > i_size_read(inode))
780 new_size = offset + len;
781
782 /* Change file size if needed */
783 if (new_size) {
784 bhv_vattr_t va;
785
786 va.va_mask = XFS_AT_SIZE;
787 va.va_size = new_size;
788 error = xfs_setattr(ip, &va, ATTR_NOLOCK, NULL);
789 }
790
791 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
792out_error:
793 return error;
794}
795
796const struct inode_operations xfs_inode_operations = {
797 .permission = xfs_vn_permission,
798 .truncate = xfs_vn_truncate,
799 .getattr = xfs_vn_getattr,
800 .setattr = xfs_vn_setattr,
801 .setxattr = generic_setxattr,
802 .getxattr = generic_getxattr,
803 .removexattr = generic_removexattr,
804 .listxattr = xfs_vn_listxattr,
805 .fallocate = xfs_vn_fallocate,
806};
807
808const struct inode_operations xfs_dir_inode_operations = {
809 .create = xfs_vn_create,
810 .lookup = xfs_vn_lookup,
811 .link = xfs_vn_link,
812 .unlink = xfs_vn_unlink,
813 .symlink = xfs_vn_symlink,
814 .mkdir = xfs_vn_mkdir,
815 /*
816 * Yes, XFS uses the same method for rmdir and unlink.
817 *
818 * There are some subtile differences deeper in the code,
819 * but we use S_ISDIR to check for those.
820 */
821 .rmdir = xfs_vn_unlink,
822 .mknod = xfs_vn_mknod,
823 .rename = xfs_vn_rename,
824 .permission = xfs_vn_permission,
825 .getattr = xfs_vn_getattr,
826 .setattr = xfs_vn_setattr,
827 .setxattr = generic_setxattr,
828 .getxattr = generic_getxattr,
829 .removexattr = generic_removexattr,
830 .listxattr = xfs_vn_listxattr,
831};
832
833const struct inode_operations xfs_dir_ci_inode_operations = {
834 .create = xfs_vn_create,
835 .lookup = xfs_vn_ci_lookup,
836 .link = xfs_vn_link,
837 .unlink = xfs_vn_unlink,
838 .symlink = xfs_vn_symlink,
839 .mkdir = xfs_vn_mkdir,
840 /*
841 * Yes, XFS uses the same method for rmdir and unlink.
842 *
843 * There are some subtile differences deeper in the code,
844 * but we use S_ISDIR to check for those.
845 */
846 .rmdir = xfs_vn_unlink,
847 .mknod = xfs_vn_mknod,
848 .rename = xfs_vn_rename,
849 .permission = xfs_vn_permission,
850 .getattr = xfs_vn_getattr,
851 .setattr = xfs_vn_setattr,
852 .setxattr = generic_setxattr,
853 .getxattr = generic_getxattr,
854 .removexattr = generic_removexattr,
855 .listxattr = xfs_vn_listxattr,
856};
857
858const struct inode_operations xfs_symlink_inode_operations = {
859 .readlink = generic_readlink,
860 .follow_link = xfs_vn_follow_link,
861 .put_link = xfs_vn_put_link,
862 .permission = xfs_vn_permission,
863 .getattr = xfs_vn_getattr,
864 .setattr = xfs_vn_setattr,
865 .setxattr = generic_setxattr,
866 .getxattr = generic_getxattr,
867 .removexattr = generic_removexattr,
868 .listxattr = xfs_vn_listxattr,
869};
Linux 6.x block layer and io_uring tree(s)