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_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_da_format.h"
26 #include "xfs_inode.h"
27 #include "xfs_bmap.h"
28 #include "xfs_bmap_util.h"
29 #include "xfs_acl.h"
30 #include "xfs_quota.h"
31 #include "xfs_error.h"
32 #include "xfs_attr.h"
33 #include "xfs_trans.h"
34 #include "xfs_trace.h"
35 #include "xfs_icache.h"
36 #include "xfs_symlink.h"
37 #include "xfs_da_btree.h"
38 #include "xfs_dir2.h"
39 #include "xfs_trans_space.h"
40 #include "xfs_pnfs.h"
41 #include "xfs_iomap.h"
42
43 #include <linux/capability.h>
44 #include <linux/xattr.h>
45 #include <linux/posix_acl.h>
46 #include <linux/security.h>
47 #include <linux/iomap.h>
48 #include <linux/slab.h>
49
50 /*
51 * Directories have different lock order w.r.t. mmap_sem compared to regular
52 * files. This is due to readdir potentially triggering page faults on a user
53 * buffer inside filldir(), and this happens with the ilock on the directory
54 * held. For regular files, the lock order is the other way around - the
55 * mmap_sem is taken during the page fault, and then we lock the ilock to do
56 * block mapping. Hence we need a different class for the directory ilock so
57 * that lockdep can tell them apart.
58 */
59 static struct lock_class_key xfs_nondir_ilock_class;
60 static struct lock_class_key xfs_dir_ilock_class;
61
62 static int
xfs_initxattrs(struct inode * inode,const struct xattr * xattr_array,void * fs_info)63 xfs_initxattrs(
64 struct inode *inode,
65 const struct xattr *xattr_array,
66 void *fs_info)
67 {
68 const struct xattr *xattr;
69 struct xfs_inode *ip = XFS_I(inode);
70 int error = 0;
71
72 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
73 error = xfs_attr_set(ip, xattr->name, xattr->value,
74 xattr->value_len, ATTR_SECURE);
75 if (error < 0)
76 break;
77 }
78 return error;
79 }
80
81 /*
82 * Hook in SELinux. This is not quite correct yet, what we really need
83 * here (as we do for default ACLs) is a mechanism by which creation of
84 * these attrs can be journalled at inode creation time (along with the
85 * inode, of course, such that log replay can't cause these to be lost).
86 */
87
88 STATIC int
xfs_init_security(struct inode * inode,struct inode * dir,const struct qstr * qstr)89 xfs_init_security(
90 struct inode *inode,
91 struct inode *dir,
92 const struct qstr *qstr)
93 {
94 return security_inode_init_security(inode, dir, qstr,
95 &xfs_initxattrs, NULL);
96 }
97
98 static void
xfs_dentry_to_name(struct xfs_name * namep,struct dentry * dentry)99 xfs_dentry_to_name(
100 struct xfs_name *namep,
101 struct dentry *dentry)
102 {
103 namep->name = dentry->d_name.name;
104 namep->len = dentry->d_name.len;
105 namep->type = XFS_DIR3_FT_UNKNOWN;
106 }
107
108 static int
xfs_dentry_mode_to_name(struct xfs_name * namep,struct dentry * dentry,int mode)109 xfs_dentry_mode_to_name(
110 struct xfs_name *namep,
111 struct dentry *dentry,
112 int mode)
113 {
114 namep->name = dentry->d_name.name;
115 namep->len = dentry->d_name.len;
116 namep->type = xfs_mode_to_ftype(mode);
117
118 if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN))
119 return -EFSCORRUPTED;
120
121 return 0;
122 }
123
124 STATIC void
xfs_cleanup_inode(struct inode * dir,struct inode * inode,struct dentry * dentry)125 xfs_cleanup_inode(
126 struct inode *dir,
127 struct inode *inode,
128 struct dentry *dentry)
129 {
130 struct xfs_name teardown;
131
132 /* Oh, the horror.
133 * If we can't add the ACL or we fail in
134 * xfs_init_security we must back out.
135 * ENOSPC can hit here, among other things.
136 */
137 xfs_dentry_to_name(&teardown, dentry);
138
139 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
140 }
141
142 STATIC int
xfs_generic_create(struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev,bool tmpfile)143 xfs_generic_create(
144 struct inode *dir,
145 struct dentry *dentry,
146 umode_t mode,
147 dev_t rdev,
148 bool tmpfile) /* unnamed file */
149 {
150 struct inode *inode;
151 struct xfs_inode *ip = NULL;
152 struct posix_acl *default_acl, *acl;
153 struct xfs_name name;
154 int error;
155
156 /*
157 * Irix uses Missed'em'V split, but doesn't want to see
158 * the upper 5 bits of (14bit) major.
159 */
160 if (S_ISCHR(mode) || S_ISBLK(mode)) {
161 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
162 return -EINVAL;
163 rdev = sysv_encode_dev(rdev);
164 } else {
165 rdev = 0;
166 }
167
168 error = posix_acl_create(dir, &mode, &default_acl, &acl);
169 if (error)
170 return error;
171
172 /* Verify mode is valid also for tmpfile case */
173 error = xfs_dentry_mode_to_name(&name, dentry, mode);
174 if (unlikely(error))
175 goto out_free_acl;
176
177 if (!tmpfile) {
178 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
179 } else {
180 error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip);
181 }
182 if (unlikely(error))
183 goto out_free_acl;
184
185 inode = VFS_I(ip);
186
187 error = xfs_init_security(inode, dir, &dentry->d_name);
188 if (unlikely(error))
189 goto out_cleanup_inode;
190
191 #ifdef CONFIG_XFS_POSIX_ACL
192 if (default_acl) {
193 error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
194 if (error)
195 goto out_cleanup_inode;
196 }
197 if (acl) {
198 error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
199 if (error)
200 goto out_cleanup_inode;
201 }
202 #endif
203
204 xfs_setup_iops(ip);
205
206 if (tmpfile)
207 d_tmpfile(dentry, inode);
208 else
209 d_instantiate(dentry, inode);
210
211 xfs_finish_inode_setup(ip);
212
213 out_free_acl:
214 if (default_acl)
215 posix_acl_release(default_acl);
216 if (acl)
217 posix_acl_release(acl);
218 return error;
219
220 out_cleanup_inode:
221 xfs_finish_inode_setup(ip);
222 if (!tmpfile)
223 xfs_cleanup_inode(dir, inode, dentry);
224 iput(inode);
225 goto out_free_acl;
226 }
227
228 STATIC int
xfs_vn_mknod(struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev)229 xfs_vn_mknod(
230 struct inode *dir,
231 struct dentry *dentry,
232 umode_t mode,
233 dev_t rdev)
234 {
235 return xfs_generic_create(dir, dentry, mode, rdev, false);
236 }
237
238 STATIC int
xfs_vn_create(struct inode * dir,struct dentry * dentry,umode_t mode,bool flags)239 xfs_vn_create(
240 struct inode *dir,
241 struct dentry *dentry,
242 umode_t mode,
243 bool flags)
244 {
245 return xfs_vn_mknod(dir, dentry, mode, 0);
246 }
247
248 STATIC int
xfs_vn_mkdir(struct inode * dir,struct dentry * dentry,umode_t mode)249 xfs_vn_mkdir(
250 struct inode *dir,
251 struct dentry *dentry,
252 umode_t mode)
253 {
254 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
255 }
256
257 STATIC struct dentry *
xfs_vn_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)258 xfs_vn_lookup(
259 struct inode *dir,
260 struct dentry *dentry,
261 unsigned int flags)
262 {
263 struct xfs_inode *cip;
264 struct xfs_name name;
265 int error;
266
267 if (dentry->d_name.len >= MAXNAMELEN)
268 return ERR_PTR(-ENAMETOOLONG);
269
270 xfs_dentry_to_name(&name, dentry);
271 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
272 if (unlikely(error)) {
273 if (unlikely(error != -ENOENT))
274 return ERR_PTR(error);
275 d_add(dentry, NULL);
276 return NULL;
277 }
278
279 return d_splice_alias(VFS_I(cip), dentry);
280 }
281
282 STATIC struct dentry *
xfs_vn_ci_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)283 xfs_vn_ci_lookup(
284 struct inode *dir,
285 struct dentry *dentry,
286 unsigned int flags)
287 {
288 struct xfs_inode *ip;
289 struct xfs_name xname;
290 struct xfs_name ci_name;
291 struct qstr dname;
292 int error;
293
294 if (dentry->d_name.len >= MAXNAMELEN)
295 return ERR_PTR(-ENAMETOOLONG);
296
297 xfs_dentry_to_name(&xname, dentry);
298 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
299 if (unlikely(error)) {
300 if (unlikely(error != -ENOENT))
301 return ERR_PTR(error);
302 /*
303 * call d_add(dentry, NULL) here when d_drop_negative_children
304 * is called in xfs_vn_mknod (ie. allow negative dentries
305 * with CI filesystems).
306 */
307 return NULL;
308 }
309
310 /* if exact match, just splice and exit */
311 if (!ci_name.name)
312 return d_splice_alias(VFS_I(ip), dentry);
313
314 /* else case-insensitive match... */
315 dname.name = ci_name.name;
316 dname.len = ci_name.len;
317 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
318 kmem_free(ci_name.name);
319 return dentry;
320 }
321
322 STATIC int
xfs_vn_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)323 xfs_vn_link(
324 struct dentry *old_dentry,
325 struct inode *dir,
326 struct dentry *dentry)
327 {
328 struct inode *inode = d_inode(old_dentry);
329 struct xfs_name name;
330 int error;
331
332 error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode);
333 if (unlikely(error))
334 return error;
335
336 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
337 if (unlikely(error))
338 return error;
339
340 ihold(inode);
341 d_instantiate(dentry, inode);
342 return 0;
343 }
344
345 STATIC int
xfs_vn_unlink(struct inode * dir,struct dentry * dentry)346 xfs_vn_unlink(
347 struct inode *dir,
348 struct dentry *dentry)
349 {
350 struct xfs_name name;
351 int error;
352
353 xfs_dentry_to_name(&name, dentry);
354
355 error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
356 if (error)
357 return error;
358
359 /*
360 * With unlink, the VFS makes the dentry "negative": no inode,
361 * but still hashed. This is incompatible with case-insensitive
362 * mode, so invalidate (unhash) the dentry in CI-mode.
363 */
364 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
365 d_invalidate(dentry);
366 return 0;
367 }
368
369 STATIC int
xfs_vn_symlink(struct inode * dir,struct dentry * dentry,const char * symname)370 xfs_vn_symlink(
371 struct inode *dir,
372 struct dentry *dentry,
373 const char *symname)
374 {
375 struct inode *inode;
376 struct xfs_inode *cip = NULL;
377 struct xfs_name name;
378 int error;
379 umode_t mode;
380
381 mode = S_IFLNK |
382 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
383 error = xfs_dentry_mode_to_name(&name, dentry, mode);
384 if (unlikely(error))
385 goto out;
386
387 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
388 if (unlikely(error))
389 goto out;
390
391 inode = VFS_I(cip);
392
393 error = xfs_init_security(inode, dir, &dentry->d_name);
394 if (unlikely(error))
395 goto out_cleanup_inode;
396
397 xfs_setup_iops(cip);
398
399 d_instantiate(dentry, inode);
400 xfs_finish_inode_setup(cip);
401 return 0;
402
403 out_cleanup_inode:
404 xfs_finish_inode_setup(cip);
405 xfs_cleanup_inode(dir, inode, dentry);
406 iput(inode);
407 out:
408 return error;
409 }
410
411 STATIC int
xfs_vn_rename(struct inode * odir,struct dentry * odentry,struct inode * ndir,struct dentry * ndentry,unsigned int flags)412 xfs_vn_rename(
413 struct inode *odir,
414 struct dentry *odentry,
415 struct inode *ndir,
416 struct dentry *ndentry,
417 unsigned int flags)
418 {
419 struct inode *new_inode = d_inode(ndentry);
420 int omode = 0;
421 int error;
422 struct xfs_name oname;
423 struct xfs_name nname;
424
425 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
426 return -EINVAL;
427
428 /* if we are exchanging files, we need to set i_mode of both files */
429 if (flags & RENAME_EXCHANGE)
430 omode = d_inode(ndentry)->i_mode;
431
432 error = xfs_dentry_mode_to_name(&oname, odentry, omode);
433 if (omode && unlikely(error))
434 return error;
435
436 error = xfs_dentry_mode_to_name(&nname, ndentry,
437 d_inode(odentry)->i_mode);
438 if (unlikely(error))
439 return error;
440
441 return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)),
442 XFS_I(ndir), &nname,
443 new_inode ? XFS_I(new_inode) : NULL, flags);
444 }
445
446 /*
447 * careful here - this function can get called recursively, so
448 * we need to be very careful about how much stack we use.
449 * uio is kmalloced for this reason...
450 */
451 STATIC const char *
xfs_vn_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)452 xfs_vn_get_link(
453 struct dentry *dentry,
454 struct inode *inode,
455 struct delayed_call *done)
456 {
457 char *link;
458 int error = -ENOMEM;
459
460 if (!dentry)
461 return ERR_PTR(-ECHILD);
462
463 link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL);
464 if (!link)
465 goto out_err;
466
467 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
468 if (unlikely(error))
469 goto out_kfree;
470
471 set_delayed_call(done, kfree_link, link);
472 return link;
473
474 out_kfree:
475 kfree(link);
476 out_err:
477 return ERR_PTR(error);
478 }
479
480 STATIC const char *
xfs_vn_get_link_inline(struct dentry * dentry,struct inode * inode,struct delayed_call * done)481 xfs_vn_get_link_inline(
482 struct dentry *dentry,
483 struct inode *inode,
484 struct delayed_call *done)
485 {
486 ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE);
487 return XFS_I(inode)->i_df.if_u1.if_data;
488 }
489
490 STATIC int
xfs_vn_getattr(const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)491 xfs_vn_getattr(
492 const struct path *path,
493 struct kstat *stat,
494 u32 request_mask,
495 unsigned int query_flags)
496 {
497 struct inode *inode = d_inode(path->dentry);
498 struct xfs_inode *ip = XFS_I(inode);
499 struct xfs_mount *mp = ip->i_mount;
500
501 trace_xfs_getattr(ip);
502
503 if (XFS_FORCED_SHUTDOWN(mp))
504 return -EIO;
505
506 stat->size = XFS_ISIZE(ip);
507 stat->dev = inode->i_sb->s_dev;
508 stat->mode = inode->i_mode;
509 stat->nlink = inode->i_nlink;
510 stat->uid = inode->i_uid;
511 stat->gid = inode->i_gid;
512 stat->ino = ip->i_ino;
513 stat->atime = inode->i_atime;
514 stat->mtime = inode->i_mtime;
515 stat->ctime = inode->i_ctime;
516 stat->blocks =
517 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
518
519 if (ip->i_d.di_version == 3) {
520 if (request_mask & STATX_BTIME) {
521 stat->result_mask |= STATX_BTIME;
522 stat->btime.tv_sec = ip->i_d.di_crtime.t_sec;
523 stat->btime.tv_nsec = ip->i_d.di_crtime.t_nsec;
524 }
525 }
526
527 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
528 stat->attributes |= STATX_ATTR_IMMUTABLE;
529 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
530 stat->attributes |= STATX_ATTR_APPEND;
531 if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP)
532 stat->attributes |= STATX_ATTR_NODUMP;
533
534 switch (inode->i_mode & S_IFMT) {
535 case S_IFBLK:
536 case S_IFCHR:
537 stat->blksize = BLKDEV_IOSIZE;
538 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
539 sysv_minor(ip->i_df.if_u2.if_rdev));
540 break;
541 default:
542 if (XFS_IS_REALTIME_INODE(ip)) {
543 /*
544 * If the file blocks are being allocated from a
545 * realtime volume, then return the inode's realtime
546 * extent size or the realtime volume's extent size.
547 */
548 stat->blksize =
549 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
550 } else
551 stat->blksize = xfs_preferred_iosize(mp);
552 stat->rdev = 0;
553 break;
554 }
555
556 return 0;
557 }
558
559 static void
xfs_setattr_mode(struct xfs_inode * ip,struct iattr * iattr)560 xfs_setattr_mode(
561 struct xfs_inode *ip,
562 struct iattr *iattr)
563 {
564 struct inode *inode = VFS_I(ip);
565 umode_t mode = iattr->ia_mode;
566
567 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
568
569 inode->i_mode &= S_IFMT;
570 inode->i_mode |= mode & ~S_IFMT;
571 }
572
573 void
xfs_setattr_time(struct xfs_inode * ip,struct iattr * iattr)574 xfs_setattr_time(
575 struct xfs_inode *ip,
576 struct iattr *iattr)
577 {
578 struct inode *inode = VFS_I(ip);
579
580 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
581
582 if (iattr->ia_valid & ATTR_ATIME)
583 inode->i_atime = iattr->ia_atime;
584 if (iattr->ia_valid & ATTR_CTIME)
585 inode->i_ctime = iattr->ia_ctime;
586 if (iattr->ia_valid & ATTR_MTIME)
587 inode->i_mtime = iattr->ia_mtime;
588 }
589
590 static int
xfs_vn_change_ok(struct dentry * dentry,struct iattr * iattr)591 xfs_vn_change_ok(
592 struct dentry *dentry,
593 struct iattr *iattr)
594 {
595 struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount;
596
597 if (mp->m_flags & XFS_MOUNT_RDONLY)
598 return -EROFS;
599
600 if (XFS_FORCED_SHUTDOWN(mp))
601 return -EIO;
602
603 return setattr_prepare(dentry, iattr);
604 }
605
606 /*
607 * Set non-size attributes of an inode.
608 *
609 * Caution: The caller of this function is responsible for calling
610 * setattr_prepare() or otherwise verifying the change is fine.
611 */
612 int
xfs_setattr_nonsize(struct xfs_inode * ip,struct iattr * iattr,int flags)613 xfs_setattr_nonsize(
614 struct xfs_inode *ip,
615 struct iattr *iattr,
616 int flags)
617 {
618 xfs_mount_t *mp = ip->i_mount;
619 struct inode *inode = VFS_I(ip);
620 int mask = iattr->ia_valid;
621 xfs_trans_t *tp;
622 int error;
623 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
624 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
625 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
626 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
627
628 ASSERT((mask & ATTR_SIZE) == 0);
629
630 /*
631 * If disk quotas is on, we make sure that the dquots do exist on disk,
632 * before we start any other transactions. Trying to do this later
633 * is messy. We don't care to take a readlock to look at the ids
634 * in inode here, because we can't hold it across the trans_reserve.
635 * If the IDs do change before we take the ilock, we're covered
636 * because the i_*dquot fields will get updated anyway.
637 */
638 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
639 uint qflags = 0;
640
641 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
642 uid = iattr->ia_uid;
643 qflags |= XFS_QMOPT_UQUOTA;
644 } else {
645 uid = inode->i_uid;
646 }
647 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
648 gid = iattr->ia_gid;
649 qflags |= XFS_QMOPT_GQUOTA;
650 } else {
651 gid = inode->i_gid;
652 }
653
654 /*
655 * We take a reference when we initialize udqp and gdqp,
656 * so it is important that we never blindly double trip on
657 * the same variable. See xfs_create() for an example.
658 */
659 ASSERT(udqp == NULL);
660 ASSERT(gdqp == NULL);
661 error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
662 xfs_kgid_to_gid(gid),
663 xfs_get_projid(ip),
664 qflags, &udqp, &gdqp, NULL);
665 if (error)
666 return error;
667 }
668
669 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
670 if (error)
671 goto out_dqrele;
672
673 xfs_ilock(ip, XFS_ILOCK_EXCL);
674 xfs_trans_ijoin(tp, ip, 0);
675
676 /*
677 * Change file ownership. Must be the owner or privileged.
678 */
679 if (mask & (ATTR_UID|ATTR_GID)) {
680 /*
681 * These IDs could have changed since we last looked at them.
682 * But, we're assured that if the ownership did change
683 * while we didn't have the inode locked, inode's dquot(s)
684 * would have changed also.
685 */
686 iuid = inode->i_uid;
687 igid = inode->i_gid;
688 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
689 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
690
691 /*
692 * Do a quota reservation only if uid/gid is actually
693 * going to change.
694 */
695 if (XFS_IS_QUOTA_RUNNING(mp) &&
696 ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
697 (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
698 ASSERT(tp);
699 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
700 NULL, capable(CAP_FOWNER) ?
701 XFS_QMOPT_FORCE_RES : 0);
702 if (error) /* out of quota */
703 goto out_cancel;
704 }
705 }
706
707 /*
708 * Change file ownership. Must be the owner or privileged.
709 */
710 if (mask & (ATTR_UID|ATTR_GID)) {
711 /*
712 * CAP_FSETID overrides the following restrictions:
713 *
714 * The set-user-ID and set-group-ID bits of a file will be
715 * cleared upon successful return from chown()
716 */
717 if ((inode->i_mode & (S_ISUID|S_ISGID)) &&
718 !capable(CAP_FSETID))
719 inode->i_mode &= ~(S_ISUID|S_ISGID);
720
721 /*
722 * Change the ownerships and register quota modifications
723 * in the transaction.
724 */
725 if (!uid_eq(iuid, uid)) {
726 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
727 ASSERT(mask & ATTR_UID);
728 ASSERT(udqp);
729 olddquot1 = xfs_qm_vop_chown(tp, ip,
730 &ip->i_udquot, udqp);
731 }
732 ip->i_d.di_uid = xfs_kuid_to_uid(uid);
733 inode->i_uid = uid;
734 }
735 if (!gid_eq(igid, gid)) {
736 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
737 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
738 !XFS_IS_PQUOTA_ON(mp));
739 ASSERT(mask & ATTR_GID);
740 ASSERT(gdqp);
741 olddquot2 = xfs_qm_vop_chown(tp, ip,
742 &ip->i_gdquot, gdqp);
743 }
744 ip->i_d.di_gid = xfs_kgid_to_gid(gid);
745 inode->i_gid = gid;
746 }
747 }
748
749 if (mask & ATTR_MODE)
750 xfs_setattr_mode(ip, iattr);
751 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
752 xfs_setattr_time(ip, iattr);
753
754 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
755
756 XFS_STATS_INC(mp, xs_ig_attrchg);
757
758 if (mp->m_flags & XFS_MOUNT_WSYNC)
759 xfs_trans_set_sync(tp);
760 error = xfs_trans_commit(tp);
761
762 xfs_iunlock(ip, XFS_ILOCK_EXCL);
763
764 /*
765 * Release any dquot(s) the inode had kept before chown.
766 */
767 xfs_qm_dqrele(olddquot1);
768 xfs_qm_dqrele(olddquot2);
769 xfs_qm_dqrele(udqp);
770 xfs_qm_dqrele(gdqp);
771
772 if (error)
773 return error;
774
775 /*
776 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
777 * update. We could avoid this with linked transactions
778 * and passing down the transaction pointer all the way
779 * to attr_set. No previous user of the generic
780 * Posix ACL code seems to care about this issue either.
781 */
782 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
783 error = posix_acl_chmod(inode, inode->i_mode);
784 if (error)
785 return error;
786 }
787
788 return 0;
789
790 out_cancel:
791 xfs_trans_cancel(tp);
792 xfs_iunlock(ip, XFS_ILOCK_EXCL);
793 out_dqrele:
794 xfs_qm_dqrele(udqp);
795 xfs_qm_dqrele(gdqp);
796 return error;
797 }
798
799 int
xfs_vn_setattr_nonsize(struct dentry * dentry,struct iattr * iattr)800 xfs_vn_setattr_nonsize(
801 struct dentry *dentry,
802 struct iattr *iattr)
803 {
804 struct xfs_inode *ip = XFS_I(d_inode(dentry));
805 int error;
806
807 trace_xfs_setattr(ip);
808
809 error = xfs_vn_change_ok(dentry, iattr);
810 if (error)
811 return error;
812 return xfs_setattr_nonsize(ip, iattr, 0);
813 }
814
815 /*
816 * Truncate file. Must have write permission and not be a directory.
817 *
818 * Caution: The caller of this function is responsible for calling
819 * setattr_prepare() or otherwise verifying the change is fine.
820 */
821 STATIC int
xfs_setattr_size(struct xfs_inode * ip,struct iattr * iattr)822 xfs_setattr_size(
823 struct xfs_inode *ip,
824 struct iattr *iattr)
825 {
826 struct xfs_mount *mp = ip->i_mount;
827 struct inode *inode = VFS_I(ip);
828 xfs_off_t oldsize, newsize;
829 struct xfs_trans *tp;
830 int error;
831 uint lock_flags = 0;
832 bool did_zeroing = false;
833
834 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
835 ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
836 ASSERT(S_ISREG(inode->i_mode));
837 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
838 ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
839
840 oldsize = inode->i_size;
841 newsize = iattr->ia_size;
842
843 /*
844 * Short circuit the truncate case for zero length files.
845 */
846 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
847 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
848 return 0;
849
850 /*
851 * Use the regular setattr path to update the timestamps.
852 */
853 iattr->ia_valid &= ~ATTR_SIZE;
854 return xfs_setattr_nonsize(ip, iattr, 0);
855 }
856
857 /*
858 * Make sure that the dquots are attached to the inode.
859 */
860 error = xfs_qm_dqattach(ip, 0);
861 if (error)
862 return error;
863
864 /*
865 * Wait for all direct I/O to complete.
866 */
867 inode_dio_wait(inode);
868
869 /*
870 * File data changes must be complete before we start the transaction to
871 * modify the inode. This needs to be done before joining the inode to
872 * the transaction because the inode cannot be unlocked once it is a
873 * part of the transaction.
874 *
875 * Start with zeroing any data beyond EOF that we may expose on file
876 * extension, or zeroing out the rest of the block on a downward
877 * truncate.
878 */
879 if (newsize > oldsize) {
880 error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing);
881 } else {
882 error = iomap_truncate_page(inode, newsize, &did_zeroing,
883 &xfs_iomap_ops);
884 }
885
886 if (error)
887 return error;
888
889 /*
890 * We've already locked out new page faults, so now we can safely remove
891 * pages from the page cache knowing they won't get refaulted until we
892 * drop the XFS_MMAP_EXCL lock after the extent manipulations are
893 * complete. The truncate_setsize() call also cleans partial EOF page
894 * PTEs on extending truncates and hence ensures sub-page block size
895 * filesystems are correctly handled, too.
896 *
897 * We have to do all the page cache truncate work outside the
898 * transaction context as the "lock" order is page lock->log space
899 * reservation as defined by extent allocation in the writeback path.
900 * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but
901 * having already truncated the in-memory version of the file (i.e. made
902 * user visible changes). There's not much we can do about this, except
903 * to hope that the caller sees ENOMEM and retries the truncate
904 * operation.
905 *
906 * And we update in-core i_size and truncate page cache beyond newsize
907 * before writeback the [di_size, newsize] range, so we're guaranteed
908 * not to write stale data past the new EOF on truncate down.
909 */
910 truncate_setsize(inode, newsize);
911
912 /*
913 * We are going to log the inode size change in this transaction so
914 * any previous writes that are beyond the on disk EOF and the new
915 * EOF that have not been written out need to be written here. If we
916 * do not write the data out, we expose ourselves to the null files
917 * problem. Note that this includes any block zeroing we did above;
918 * otherwise those blocks may not be zeroed after a crash.
919 */
920 if (did_zeroing ||
921 (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) {
922 error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
923 ip->i_d.di_size, newsize - 1);
924 if (error)
925 return error;
926 }
927
928 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
929 if (error)
930 return error;
931
932 lock_flags |= XFS_ILOCK_EXCL;
933 xfs_ilock(ip, XFS_ILOCK_EXCL);
934 xfs_trans_ijoin(tp, ip, 0);
935
936 /*
937 * Only change the c/mtime if we are changing the size or we are
938 * explicitly asked to change it. This handles the semantic difference
939 * between truncate() and ftruncate() as implemented in the VFS.
940 *
941 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
942 * special case where we need to update the times despite not having
943 * these flags set. For all other operations the VFS set these flags
944 * explicitly if it wants a timestamp update.
945 */
946 if (newsize != oldsize &&
947 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
948 iattr->ia_ctime = iattr->ia_mtime =
949 current_time(inode);
950 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
951 }
952
953 /*
954 * The first thing we do is set the size to new_size permanently on
955 * disk. This way we don't have to worry about anyone ever being able
956 * to look at the data being freed even in the face of a crash.
957 * What we're getting around here is the case where we free a block, it
958 * is allocated to another file, it is written to, and then we crash.
959 * If the new data gets written to the file but the log buffers
960 * containing the free and reallocation don't, then we'd end up with
961 * garbage in the blocks being freed. As long as we make the new size
962 * permanent before actually freeing any blocks it doesn't matter if
963 * they get written to.
964 */
965 ip->i_d.di_size = newsize;
966 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
967
968 if (newsize <= oldsize) {
969 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
970 if (error)
971 goto out_trans_cancel;
972
973 /*
974 * Truncated "down", so we're removing references to old data
975 * here - if we delay flushing for a long time, we expose
976 * ourselves unduly to the notorious NULL files problem. So,
977 * we mark this inode and flush it when the file is closed,
978 * and do not wait the usual (long) time for writeout.
979 */
980 xfs_iflags_set(ip, XFS_ITRUNCATED);
981
982 /* A truncate down always removes post-EOF blocks. */
983 xfs_inode_clear_eofblocks_tag(ip);
984 }
985
986 if (iattr->ia_valid & ATTR_MODE)
987 xfs_setattr_mode(ip, iattr);
988 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
989 xfs_setattr_time(ip, iattr);
990
991 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
992
993 XFS_STATS_INC(mp, xs_ig_attrchg);
994
995 if (mp->m_flags & XFS_MOUNT_WSYNC)
996 xfs_trans_set_sync(tp);
997
998 error = xfs_trans_commit(tp);
999 out_unlock:
1000 if (lock_flags)
1001 xfs_iunlock(ip, lock_flags);
1002 return error;
1003
1004 out_trans_cancel:
1005 xfs_trans_cancel(tp);
1006 goto out_unlock;
1007 }
1008
1009 int
xfs_vn_setattr_size(struct dentry * dentry,struct iattr * iattr)1010 xfs_vn_setattr_size(
1011 struct dentry *dentry,
1012 struct iattr *iattr)
1013 {
1014 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1015 int error;
1016
1017 trace_xfs_setattr(ip);
1018
1019 error = xfs_vn_change_ok(dentry, iattr);
1020 if (error)
1021 return error;
1022 return xfs_setattr_size(ip, iattr);
1023 }
1024
1025 STATIC int
xfs_vn_setattr(struct dentry * dentry,struct iattr * iattr)1026 xfs_vn_setattr(
1027 struct dentry *dentry,
1028 struct iattr *iattr)
1029 {
1030 int error;
1031
1032 if (iattr->ia_valid & ATTR_SIZE) {
1033 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1034 uint iolock = XFS_IOLOCK_EXCL;
1035
1036 error = xfs_break_layouts(d_inode(dentry), &iolock);
1037 if (error)
1038 return error;
1039
1040 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
1041 error = xfs_vn_setattr_size(dentry, iattr);
1042 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
1043 } else {
1044 error = xfs_vn_setattr_nonsize(dentry, iattr);
1045 }
1046
1047 return error;
1048 }
1049
1050 STATIC int
xfs_vn_update_time(struct inode * inode,struct timespec * now,int flags)1051 xfs_vn_update_time(
1052 struct inode *inode,
1053 struct timespec *now,
1054 int flags)
1055 {
1056 struct xfs_inode *ip = XFS_I(inode);
1057 struct xfs_mount *mp = ip->i_mount;
1058 struct xfs_trans *tp;
1059 int error;
1060
1061 trace_xfs_update_time(ip);
1062
1063 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
1064 if (error)
1065 return error;
1066
1067 xfs_ilock(ip, XFS_ILOCK_EXCL);
1068 if (flags & S_CTIME)
1069 inode->i_ctime = *now;
1070 if (flags & S_MTIME)
1071 inode->i_mtime = *now;
1072 if (flags & S_ATIME)
1073 inode->i_atime = *now;
1074
1075 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1076 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
1077 return xfs_trans_commit(tp);
1078 }
1079
1080 STATIC int
xfs_vn_fiemap(struct inode * inode,struct fiemap_extent_info * fieinfo,u64 start,u64 length)1081 xfs_vn_fiemap(
1082 struct inode *inode,
1083 struct fiemap_extent_info *fieinfo,
1084 u64 start,
1085 u64 length)
1086 {
1087 int error;
1088
1089 xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED);
1090 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1091 fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;
1092 error = iomap_fiemap(inode, fieinfo, start, length,
1093 &xfs_xattr_iomap_ops);
1094 } else {
1095 error = iomap_fiemap(inode, fieinfo, start, length,
1096 &xfs_iomap_ops);
1097 }
1098 xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED);
1099
1100 return error;
1101 }
1102
1103 STATIC int
xfs_vn_tmpfile(struct inode * dir,struct dentry * dentry,umode_t mode)1104 xfs_vn_tmpfile(
1105 struct inode *dir,
1106 struct dentry *dentry,
1107 umode_t mode)
1108 {
1109 return xfs_generic_create(dir, dentry, mode, 0, true);
1110 }
1111
1112 static const struct inode_operations xfs_inode_operations = {
1113 .get_acl = xfs_get_acl,
1114 .set_acl = xfs_set_acl,
1115 .getattr = xfs_vn_getattr,
1116 .setattr = xfs_vn_setattr,
1117 .listxattr = xfs_vn_listxattr,
1118 .fiemap = xfs_vn_fiemap,
1119 .update_time = xfs_vn_update_time,
1120 };
1121
1122 static const struct inode_operations xfs_dir_inode_operations = {
1123 .create = xfs_vn_create,
1124 .lookup = xfs_vn_lookup,
1125 .link = xfs_vn_link,
1126 .unlink = xfs_vn_unlink,
1127 .symlink = xfs_vn_symlink,
1128 .mkdir = xfs_vn_mkdir,
1129 /*
1130 * Yes, XFS uses the same method for rmdir and unlink.
1131 *
1132 * There are some subtile differences deeper in the code,
1133 * but we use S_ISDIR to check for those.
1134 */
1135 .rmdir = xfs_vn_unlink,
1136 .mknod = xfs_vn_mknod,
1137 .rename = xfs_vn_rename,
1138 .get_acl = xfs_get_acl,
1139 .set_acl = xfs_set_acl,
1140 .getattr = xfs_vn_getattr,
1141 .setattr = xfs_vn_setattr,
1142 .listxattr = xfs_vn_listxattr,
1143 .update_time = xfs_vn_update_time,
1144 .tmpfile = xfs_vn_tmpfile,
1145 };
1146
1147 static const struct inode_operations xfs_dir_ci_inode_operations = {
1148 .create = xfs_vn_create,
1149 .lookup = xfs_vn_ci_lookup,
1150 .link = xfs_vn_link,
1151 .unlink = xfs_vn_unlink,
1152 .symlink = xfs_vn_symlink,
1153 .mkdir = xfs_vn_mkdir,
1154 /*
1155 * Yes, XFS uses the same method for rmdir and unlink.
1156 *
1157 * There are some subtile differences deeper in the code,
1158 * but we use S_ISDIR to check for those.
1159 */
1160 .rmdir = xfs_vn_unlink,
1161 .mknod = xfs_vn_mknod,
1162 .rename = xfs_vn_rename,
1163 .get_acl = xfs_get_acl,
1164 .set_acl = xfs_set_acl,
1165 .getattr = xfs_vn_getattr,
1166 .setattr = xfs_vn_setattr,
1167 .listxattr = xfs_vn_listxattr,
1168 .update_time = xfs_vn_update_time,
1169 .tmpfile = xfs_vn_tmpfile,
1170 };
1171
1172 static const struct inode_operations xfs_symlink_inode_operations = {
1173 .get_link = xfs_vn_get_link,
1174 .getattr = xfs_vn_getattr,
1175 .setattr = xfs_vn_setattr,
1176 .listxattr = xfs_vn_listxattr,
1177 .update_time = xfs_vn_update_time,
1178 };
1179
1180 static const struct inode_operations xfs_inline_symlink_inode_operations = {
1181 .get_link = xfs_vn_get_link_inline,
1182 .getattr = xfs_vn_getattr,
1183 .setattr = xfs_vn_setattr,
1184 .listxattr = xfs_vn_listxattr,
1185 .update_time = xfs_vn_update_time,
1186 };
1187
1188 /* Figure out if this file actually supports DAX. */
1189 static bool
xfs_inode_supports_dax(struct xfs_inode * ip)1190 xfs_inode_supports_dax(
1191 struct xfs_inode *ip)
1192 {
1193 struct xfs_mount *mp = ip->i_mount;
1194
1195 /* Only supported on non-reflinked files. */
1196 if (!S_ISREG(VFS_I(ip)->i_mode) || xfs_is_reflink_inode(ip))
1197 return false;
1198
1199 /* DAX mount option or DAX iflag must be set. */
1200 if (!(mp->m_flags & XFS_MOUNT_DAX) &&
1201 !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
1202 return false;
1203
1204 /* Block size must match page size */
1205 if (mp->m_sb.sb_blocksize != PAGE_SIZE)
1206 return false;
1207
1208 /* Device has to support DAX too. */
1209 return xfs_find_daxdev_for_inode(VFS_I(ip)) != NULL;
1210 }
1211
1212 STATIC void
xfs_diflags_to_iflags(struct inode * inode,struct xfs_inode * ip)1213 xfs_diflags_to_iflags(
1214 struct inode *inode,
1215 struct xfs_inode *ip)
1216 {
1217 uint16_t flags = ip->i_d.di_flags;
1218
1219 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC |
1220 S_NOATIME | S_DAX);
1221
1222 if (flags & XFS_DIFLAG_IMMUTABLE)
1223 inode->i_flags |= S_IMMUTABLE;
1224 if (flags & XFS_DIFLAG_APPEND)
1225 inode->i_flags |= S_APPEND;
1226 if (flags & XFS_DIFLAG_SYNC)
1227 inode->i_flags |= S_SYNC;
1228 if (flags & XFS_DIFLAG_NOATIME)
1229 inode->i_flags |= S_NOATIME;
1230 if (xfs_inode_supports_dax(ip))
1231 inode->i_flags |= S_DAX;
1232 }
1233
1234 /*
1235 * Initialize the Linux inode.
1236 *
1237 * When reading existing inodes from disk this is called directly from xfs_iget,
1238 * when creating a new inode it is called from xfs_ialloc after setting up the
1239 * inode. These callers have different criteria for clearing XFS_INEW, so leave
1240 * it up to the caller to deal with unlocking the inode appropriately.
1241 */
1242 void
xfs_setup_inode(struct xfs_inode * ip)1243 xfs_setup_inode(
1244 struct xfs_inode *ip)
1245 {
1246 struct inode *inode = &ip->i_vnode;
1247 gfp_t gfp_mask;
1248
1249 inode->i_ino = ip->i_ino;
1250 inode->i_state = I_NEW;
1251
1252 inode_sb_list_add(inode);
1253 /* make the inode look hashed for the writeback code */
1254 hlist_add_fake(&inode->i_hash);
1255
1256 inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid);
1257 inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid);
1258
1259 switch (inode->i_mode & S_IFMT) {
1260 case S_IFBLK:
1261 case S_IFCHR:
1262 inode->i_rdev =
1263 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
1264 sysv_minor(ip->i_df.if_u2.if_rdev));
1265 break;
1266 default:
1267 inode->i_rdev = 0;
1268 break;
1269 }
1270
1271 i_size_write(inode, ip->i_d.di_size);
1272 xfs_diflags_to_iflags(inode, ip);
1273
1274 if (S_ISDIR(inode->i_mode)) {
1275 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
1276 ip->d_ops = ip->i_mount->m_dir_inode_ops;
1277 } else {
1278 ip->d_ops = ip->i_mount->m_nondir_inode_ops;
1279 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
1280 }
1281
1282 /*
1283 * Ensure all page cache allocations are done from GFP_NOFS context to
1284 * prevent direct reclaim recursion back into the filesystem and blowing
1285 * stacks or deadlocking.
1286 */
1287 gfp_mask = mapping_gfp_mask(inode->i_mapping);
1288 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
1289
1290 /*
1291 * If there is no attribute fork no ACL can exist on this inode,
1292 * and it can't have any file capabilities attached to it either.
1293 */
1294 if (!XFS_IFORK_Q(ip)) {
1295 inode_has_no_xattr(inode);
1296 cache_no_acl(inode);
1297 }
1298 }
1299
1300 void
xfs_setup_iops(struct xfs_inode * ip)1301 xfs_setup_iops(
1302 struct xfs_inode *ip)
1303 {
1304 struct inode *inode = &ip->i_vnode;
1305
1306 switch (inode->i_mode & S_IFMT) {
1307 case S_IFREG:
1308 inode->i_op = &xfs_inode_operations;
1309 inode->i_fop = &xfs_file_operations;
1310 inode->i_mapping->a_ops = &xfs_address_space_operations;
1311 break;
1312 case S_IFDIR:
1313 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1314 inode->i_op = &xfs_dir_ci_inode_operations;
1315 else
1316 inode->i_op = &xfs_dir_inode_operations;
1317 inode->i_fop = &xfs_dir_file_operations;
1318 break;
1319 case S_IFLNK:
1320 if (ip->i_df.if_flags & XFS_IFINLINE)
1321 inode->i_op = &xfs_inline_symlink_inode_operations;
1322 else
1323 inode->i_op = &xfs_symlink_inode_operations;
1324 break;
1325 default:
1326 inode->i_op = &xfs_inode_operations;
1327 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1328 break;
1329 }
1330 }
1331