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2
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4
5
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_da_format.h"
14#include "xfs_inode.h"
15#include "xfs_bmap.h"
16#include "xfs_bmap_util.h"
17#include "xfs_acl.h"
18#include "xfs_quota.h"
19#include "xfs_error.h"
20#include "xfs_attr.h"
21#include "xfs_trans.h"
22#include "xfs_trace.h"
23#include "xfs_icache.h"
24#include "xfs_symlink.h"
25#include "xfs_da_btree.h"
26#include "xfs_dir2.h"
27#include "xfs_trans_space.h"
28#include "xfs_iomap.h"
29#include "xfs_defer.h"
30
31#include <linux/capability.h>
32#include <linux/xattr.h>
33#include <linux/posix_acl.h>
34#include <linux/security.h>
35#include <linux/iomap.h>
36#include <linux/slab.h>
37#include <linux/iversion.h>
38
39
40
41
42
43
44
45
46
47
48static struct lock_class_key xfs_nondir_ilock_class;
49static struct lock_class_key xfs_dir_ilock_class;
50
51static int
52xfs_initxattrs(
53 struct inode *inode,
54 const struct xattr *xattr_array,
55 void *fs_info)
56{
57 const struct xattr *xattr;
58 struct xfs_inode *ip = XFS_I(inode);
59 int error = 0;
60
61 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
62 error = xfs_attr_set(ip, xattr->name, xattr->value,
63 xattr->value_len, ATTR_SECURE);
64 if (error < 0)
65 break;
66 }
67 return error;
68}
69
70
71
72
73
74
75
76
77STATIC int
78xfs_init_security(
79 struct inode *inode,
80 struct inode *dir,
81 const struct qstr *qstr)
82{
83 return security_inode_init_security(inode, dir, qstr,
84 &xfs_initxattrs, NULL);
85}
86
87static void
88xfs_dentry_to_name(
89 struct xfs_name *namep,
90 struct dentry *dentry)
91{
92 namep->name = dentry->d_name.name;
93 namep->len = dentry->d_name.len;
94 namep->type = XFS_DIR3_FT_UNKNOWN;
95}
96
97static int
98xfs_dentry_mode_to_name(
99 struct xfs_name *namep,
100 struct dentry *dentry,
101 int mode)
102{
103 namep->name = dentry->d_name.name;
104 namep->len = dentry->d_name.len;
105 namep->type = xfs_mode_to_ftype(mode);
106
107 if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN))
108 return -EFSCORRUPTED;
109
110 return 0;
111}
112
113STATIC void
114xfs_cleanup_inode(
115 struct inode *dir,
116 struct inode *inode,
117 struct dentry *dentry)
118{
119 struct xfs_name teardown;
120
121
122
123
124
125
126 xfs_dentry_to_name(&teardown, dentry);
127
128 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
129}
130
131STATIC int
132xfs_generic_create(
133 struct inode *dir,
134 struct dentry *dentry,
135 umode_t mode,
136 dev_t rdev,
137 bool tmpfile)
138{
139 struct inode *inode;
140 struct xfs_inode *ip = NULL;
141 struct posix_acl *default_acl, *acl;
142 struct xfs_name name;
143 int error;
144
145
146
147
148
149 if (S_ISCHR(mode) || S_ISBLK(mode)) {
150 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
151 return -EINVAL;
152 } else {
153 rdev = 0;
154 }
155
156 error = posix_acl_create(dir, &mode, &default_acl, &acl);
157 if (error)
158 return error;
159
160
161 error = xfs_dentry_mode_to_name(&name, dentry, mode);
162 if (unlikely(error))
163 goto out_free_acl;
164
165 if (!tmpfile) {
166 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
167 } else {
168 error = xfs_create_tmpfile(XFS_I(dir), mode, &ip);
169 }
170 if (unlikely(error))
171 goto out_free_acl;
172
173 inode = VFS_I(ip);
174
175 error = xfs_init_security(inode, dir, &dentry->d_name);
176 if (unlikely(error))
177 goto out_cleanup_inode;
178
179#ifdef CONFIG_XFS_POSIX_ACL
180 if (default_acl) {
181 error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
182 if (error)
183 goto out_cleanup_inode;
184 }
185 if (acl) {
186 error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
187 if (error)
188 goto out_cleanup_inode;
189 }
190#endif
191
192 xfs_setup_iops(ip);
193
194 if (tmpfile) {
195
196
197
198
199
200
201
202
203 set_nlink(inode, 1);
204 d_tmpfile(dentry, inode);
205 } else
206 d_instantiate(dentry, inode);
207
208 xfs_finish_inode_setup(ip);
209
210 out_free_acl:
211 if (default_acl)
212 posix_acl_release(default_acl);
213 if (acl)
214 posix_acl_release(acl);
215 return error;
216
217 out_cleanup_inode:
218 xfs_finish_inode_setup(ip);
219 if (!tmpfile)
220 xfs_cleanup_inode(dir, inode, dentry);
221 xfs_irele(ip);
222 goto out_free_acl;
223}
224
225STATIC int
226xfs_vn_mknod(
227 struct inode *dir,
228 struct dentry *dentry,
229 umode_t mode,
230 dev_t rdev)
231{
232 return xfs_generic_create(dir, dentry, mode, rdev, false);
233}
234
235STATIC int
236xfs_vn_create(
237 struct inode *dir,
238 struct dentry *dentry,
239 umode_t mode,
240 bool flags)
241{
242 return xfs_vn_mknod(dir, dentry, mode, 0);
243}
244
245STATIC int
246xfs_vn_mkdir(
247 struct inode *dir,
248 struct dentry *dentry,
249 umode_t mode)
250{
251 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
252}
253
254STATIC struct dentry *
255xfs_vn_lookup(
256 struct inode *dir,
257 struct dentry *dentry,
258 unsigned int flags)
259{
260 struct inode *inode;
261 struct xfs_inode *cip;
262 struct xfs_name name;
263 int error;
264
265 if (dentry->d_name.len >= MAXNAMELEN)
266 return ERR_PTR(-ENAMETOOLONG);
267
268 xfs_dentry_to_name(&name, dentry);
269 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
270 if (likely(!error))
271 inode = VFS_I(cip);
272 else if (likely(error == -ENOENT))
273 inode = NULL;
274 else
275 inode = ERR_PTR(error);
276 return d_splice_alias(inode, dentry);
277}
278
279STATIC struct dentry *
280xfs_vn_ci_lookup(
281 struct inode *dir,
282 struct dentry *dentry,
283 unsigned int flags)
284{
285 struct xfs_inode *ip;
286 struct xfs_name xname;
287 struct xfs_name ci_name;
288 struct qstr dname;
289 int error;
290
291 if (dentry->d_name.len >= MAXNAMELEN)
292 return ERR_PTR(-ENAMETOOLONG);
293
294 xfs_dentry_to_name(&xname, dentry);
295 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
296 if (unlikely(error)) {
297 if (unlikely(error != -ENOENT))
298 return ERR_PTR(error);
299
300
301
302
303
304 return NULL;
305 }
306
307
308 if (!ci_name.name)
309 return d_splice_alias(VFS_I(ip), dentry);
310
311
312 dname.name = ci_name.name;
313 dname.len = ci_name.len;
314 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
315 kmem_free(ci_name.name);
316 return dentry;
317}
318
319STATIC int
320xfs_vn_link(
321 struct dentry *old_dentry,
322 struct inode *dir,
323 struct dentry *dentry)
324{
325 struct inode *inode = d_inode(old_dentry);
326 struct xfs_name name;
327 int error;
328
329 error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode);
330 if (unlikely(error))
331 return error;
332
333 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
334 if (unlikely(error))
335 return error;
336
337 ihold(inode);
338 d_instantiate(dentry, inode);
339 return 0;
340}
341
342STATIC int
343xfs_vn_unlink(
344 struct inode *dir,
345 struct dentry *dentry)
346{
347 struct xfs_name name;
348 int error;
349
350 xfs_dentry_to_name(&name, dentry);
351
352 error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
353 if (error)
354 return error;
355
356
357
358
359
360
361 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
362 d_invalidate(dentry);
363 return 0;
364}
365
366STATIC int
367xfs_vn_symlink(
368 struct inode *dir,
369 struct dentry *dentry,
370 const char *symname)
371{
372 struct inode *inode;
373 struct xfs_inode *cip = NULL;
374 struct xfs_name name;
375 int error;
376 umode_t mode;
377
378 mode = S_IFLNK |
379 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
380 error = xfs_dentry_mode_to_name(&name, dentry, mode);
381 if (unlikely(error))
382 goto out;
383
384 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
385 if (unlikely(error))
386 goto out;
387
388 inode = VFS_I(cip);
389
390 error = xfs_init_security(inode, dir, &dentry->d_name);
391 if (unlikely(error))
392 goto out_cleanup_inode;
393
394 xfs_setup_iops(cip);
395
396 d_instantiate(dentry, inode);
397 xfs_finish_inode_setup(cip);
398 return 0;
399
400 out_cleanup_inode:
401 xfs_finish_inode_setup(cip);
402 xfs_cleanup_inode(dir, inode, dentry);
403 xfs_irele(cip);
404 out:
405 return error;
406}
407
408STATIC int
409xfs_vn_rename(
410 struct inode *odir,
411 struct dentry *odentry,
412 struct inode *ndir,
413 struct dentry *ndentry,
414 unsigned int flags)
415{
416 struct inode *new_inode = d_inode(ndentry);
417 int omode = 0;
418 int error;
419 struct xfs_name oname;
420 struct xfs_name nname;
421
422 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
423 return -EINVAL;
424
425
426 if (flags & RENAME_EXCHANGE)
427 omode = d_inode(ndentry)->i_mode;
428
429 error = xfs_dentry_mode_to_name(&oname, odentry, omode);
430 if (omode && unlikely(error))
431 return error;
432
433 error = xfs_dentry_mode_to_name(&nname, ndentry,
434 d_inode(odentry)->i_mode);
435 if (unlikely(error))
436 return error;
437
438 return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)),
439 XFS_I(ndir), &nname,
440 new_inode ? XFS_I(new_inode) : NULL, flags);
441}
442
443
444
445
446
447
448STATIC const char *
449xfs_vn_get_link(
450 struct dentry *dentry,
451 struct inode *inode,
452 struct delayed_call *done)
453{
454 char *link;
455 int error = -ENOMEM;
456
457 if (!dentry)
458 return ERR_PTR(-ECHILD);
459
460 link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL);
461 if (!link)
462 goto out_err;
463
464 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
465 if (unlikely(error))
466 goto out_kfree;
467
468 set_delayed_call(done, kfree_link, link);
469 return link;
470
471 out_kfree:
472 kfree(link);
473 out_err:
474 return ERR_PTR(error);
475}
476
477STATIC const char *
478xfs_vn_get_link_inline(
479 struct dentry *dentry,
480 struct inode *inode,
481 struct delayed_call *done)
482{
483 char *link;
484
485 ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE);
486
487
488
489
490
491 link = XFS_I(inode)->i_df.if_u1.if_data;
492 if (!link)
493 return ERR_PTR(-EFSCORRUPTED);
494 return link;
495}
496
497STATIC int
498xfs_vn_getattr(
499 const struct path *path,
500 struct kstat *stat,
501 u32 request_mask,
502 unsigned int query_flags)
503{
504 struct inode *inode = d_inode(path->dentry);
505 struct xfs_inode *ip = XFS_I(inode);
506 struct xfs_mount *mp = ip->i_mount;
507
508 trace_xfs_getattr(ip);
509
510 if (XFS_FORCED_SHUTDOWN(mp))
511 return -EIO;
512
513 stat->size = XFS_ISIZE(ip);
514 stat->dev = inode->i_sb->s_dev;
515 stat->mode = inode->i_mode;
516 stat->nlink = inode->i_nlink;
517 stat->uid = inode->i_uid;
518 stat->gid = inode->i_gid;
519 stat->ino = ip->i_ino;
520 stat->atime = inode->i_atime;
521 stat->mtime = inode->i_mtime;
522 stat->ctime = inode->i_ctime;
523 stat->blocks =
524 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
525
526 if (ip->i_d.di_version == 3) {
527 if (request_mask & STATX_BTIME) {
528 stat->result_mask |= STATX_BTIME;
529 stat->btime.tv_sec = ip->i_d.di_crtime.t_sec;
530 stat->btime.tv_nsec = ip->i_d.di_crtime.t_nsec;
531 }
532 }
533
534
535
536
537
538 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
539 stat->attributes |= STATX_ATTR_IMMUTABLE;
540 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
541 stat->attributes |= STATX_ATTR_APPEND;
542 if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP)
543 stat->attributes |= STATX_ATTR_NODUMP;
544
545 stat->attributes_mask |= (STATX_ATTR_IMMUTABLE |
546 STATX_ATTR_APPEND |
547 STATX_ATTR_NODUMP);
548
549 switch (inode->i_mode & S_IFMT) {
550 case S_IFBLK:
551 case S_IFCHR:
552 stat->blksize = BLKDEV_IOSIZE;
553 stat->rdev = inode->i_rdev;
554 break;
555 default:
556 if (XFS_IS_REALTIME_INODE(ip)) {
557
558
559
560
561
562 stat->blksize =
563 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
564 } else
565 stat->blksize = xfs_preferred_iosize(mp);
566 stat->rdev = 0;
567 break;
568 }
569
570 return 0;
571}
572
573static void
574xfs_setattr_mode(
575 struct xfs_inode *ip,
576 struct iattr *iattr)
577{
578 struct inode *inode = VFS_I(ip);
579 umode_t mode = iattr->ia_mode;
580
581 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
582
583 inode->i_mode &= S_IFMT;
584 inode->i_mode |= mode & ~S_IFMT;
585}
586
587void
588xfs_setattr_time(
589 struct xfs_inode *ip,
590 struct iattr *iattr)
591{
592 struct inode *inode = VFS_I(ip);
593
594 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
595
596 if (iattr->ia_valid & ATTR_ATIME)
597 inode->i_atime = iattr->ia_atime;
598 if (iattr->ia_valid & ATTR_CTIME)
599 inode->i_ctime = iattr->ia_ctime;
600 if (iattr->ia_valid & ATTR_MTIME)
601 inode->i_mtime = iattr->ia_mtime;
602}
603
604static int
605xfs_vn_change_ok(
606 struct dentry *dentry,
607 struct iattr *iattr)
608{
609 struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount;
610
611 if (mp->m_flags & XFS_MOUNT_RDONLY)
612 return -EROFS;
613
614 if (XFS_FORCED_SHUTDOWN(mp))
615 return -EIO;
616
617 return setattr_prepare(dentry, iattr);
618}
619
620
621
622
623
624
625
626int
627xfs_setattr_nonsize(
628 struct xfs_inode *ip,
629 struct iattr *iattr,
630 int flags)
631{
632 xfs_mount_t *mp = ip->i_mount;
633 struct inode *inode = VFS_I(ip);
634 int mask = iattr->ia_valid;
635 xfs_trans_t *tp;
636 int error;
637 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
638 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
639 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
640 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
641
642 ASSERT((mask & ATTR_SIZE) == 0);
643
644
645
646
647
648
649
650
651
652 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
653 uint qflags = 0;
654
655 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
656 uid = iattr->ia_uid;
657 qflags |= XFS_QMOPT_UQUOTA;
658 } else {
659 uid = inode->i_uid;
660 }
661 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
662 gid = iattr->ia_gid;
663 qflags |= XFS_QMOPT_GQUOTA;
664 } else {
665 gid = inode->i_gid;
666 }
667
668
669
670
671
672
673 ASSERT(udqp == NULL);
674 ASSERT(gdqp == NULL);
675 error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
676 xfs_kgid_to_gid(gid),
677 xfs_get_projid(ip),
678 qflags, &udqp, &gdqp, NULL);
679 if (error)
680 return error;
681 }
682
683 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
684 if (error)
685 goto out_dqrele;
686
687 xfs_ilock(ip, XFS_ILOCK_EXCL);
688 xfs_trans_ijoin(tp, ip, 0);
689
690
691
692
693 if (mask & (ATTR_UID|ATTR_GID)) {
694
695
696
697
698
699
700 iuid = inode->i_uid;
701 igid = inode->i_gid;
702 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
703 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
704
705
706
707
708
709 if (XFS_IS_QUOTA_RUNNING(mp) &&
710 ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
711 (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
712 ASSERT(tp);
713 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
714 NULL, capable(CAP_FOWNER) ?
715 XFS_QMOPT_FORCE_RES : 0);
716 if (error)
717 goto out_cancel;
718 }
719 }
720
721
722
723
724 if (mask & (ATTR_UID|ATTR_GID)) {
725
726
727
728
729
730
731 if ((inode->i_mode & (S_ISUID|S_ISGID)) &&
732 !capable(CAP_FSETID))
733 inode->i_mode &= ~(S_ISUID|S_ISGID);
734
735
736
737
738
739 if (!uid_eq(iuid, uid)) {
740 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
741 ASSERT(mask & ATTR_UID);
742 ASSERT(udqp);
743 olddquot1 = xfs_qm_vop_chown(tp, ip,
744 &ip->i_udquot, udqp);
745 }
746 ip->i_d.di_uid = xfs_kuid_to_uid(uid);
747 inode->i_uid = uid;
748 }
749 if (!gid_eq(igid, gid)) {
750 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
751 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
752 !XFS_IS_PQUOTA_ON(mp));
753 ASSERT(mask & ATTR_GID);
754 ASSERT(gdqp);
755 olddquot2 = xfs_qm_vop_chown(tp, ip,
756 &ip->i_gdquot, gdqp);
757 }
758 ip->i_d.di_gid = xfs_kgid_to_gid(gid);
759 inode->i_gid = gid;
760 }
761 }
762
763 if (mask & ATTR_MODE)
764 xfs_setattr_mode(ip, iattr);
765 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
766 xfs_setattr_time(ip, iattr);
767
768 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
769
770 XFS_STATS_INC(mp, xs_ig_attrchg);
771
772 if (mp->m_flags & XFS_MOUNT_WSYNC)
773 xfs_trans_set_sync(tp);
774 error = xfs_trans_commit(tp);
775
776 xfs_iunlock(ip, XFS_ILOCK_EXCL);
777
778
779
780
781 xfs_qm_dqrele(olddquot1);
782 xfs_qm_dqrele(olddquot2);
783 xfs_qm_dqrele(udqp);
784 xfs_qm_dqrele(gdqp);
785
786 if (error)
787 return error;
788
789
790
791
792
793
794
795
796 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
797 error = posix_acl_chmod(inode, inode->i_mode);
798 if (error)
799 return error;
800 }
801
802 return 0;
803
804out_cancel:
805 xfs_trans_cancel(tp);
806out_dqrele:
807 xfs_qm_dqrele(udqp);
808 xfs_qm_dqrele(gdqp);
809 return error;
810}
811
812int
813xfs_vn_setattr_nonsize(
814 struct dentry *dentry,
815 struct iattr *iattr)
816{
817 struct xfs_inode *ip = XFS_I(d_inode(dentry));
818 int error;
819
820 trace_xfs_setattr(ip);
821
822 error = xfs_vn_change_ok(dentry, iattr);
823 if (error)
824 return error;
825 return xfs_setattr_nonsize(ip, iattr, 0);
826}
827
828
829
830
831
832
833
834STATIC int
835xfs_setattr_size(
836 struct xfs_inode *ip,
837 struct iattr *iattr)
838{
839 struct xfs_mount *mp = ip->i_mount;
840 struct inode *inode = VFS_I(ip);
841 xfs_off_t oldsize, newsize;
842 struct xfs_trans *tp;
843 int error;
844 uint lock_flags = 0;
845 bool did_zeroing = false;
846
847 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
848 ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
849 ASSERT(S_ISREG(inode->i_mode));
850 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
851 ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
852
853 oldsize = inode->i_size;
854 newsize = iattr->ia_size;
855
856
857
858
859 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
860 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
861 return 0;
862
863
864
865
866 iattr->ia_valid &= ~ATTR_SIZE;
867 return xfs_setattr_nonsize(ip, iattr, 0);
868 }
869
870
871
872
873 error = xfs_qm_dqattach(ip);
874 if (error)
875 return error;
876
877
878
879
880 inode_dio_wait(inode);
881
882
883
884
885
886
887
888
889
890
891
892 if (newsize > oldsize) {
893 trace_xfs_zero_eof(ip, oldsize, newsize - oldsize);
894 error = iomap_zero_range(inode, oldsize, newsize - oldsize,
895 &did_zeroing, &xfs_iomap_ops);
896 } else {
897 error = iomap_truncate_page(inode, newsize, &did_zeroing,
898 &xfs_iomap_ops);
899 }
900
901 if (error)
902 return error;
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925 truncate_setsize(inode, newsize);
926
927
928
929
930
931
932
933
934
935 if (did_zeroing ||
936 (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) {
937 error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
938 ip->i_d.di_size, newsize - 1);
939 if (error)
940 return error;
941 }
942
943 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
944 if (error)
945 return error;
946
947 lock_flags |= XFS_ILOCK_EXCL;
948 xfs_ilock(ip, XFS_ILOCK_EXCL);
949 xfs_trans_ijoin(tp, ip, 0);
950
951
952
953
954
955
956
957
958
959
960
961 if (newsize != oldsize &&
962 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
963 iattr->ia_ctime = iattr->ia_mtime =
964 current_time(inode);
965 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
966 }
967
968
969
970
971
972
973
974
975
976
977
978
979
980 ip->i_d.di_size = newsize;
981 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
982
983 if (newsize <= oldsize) {
984 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
985 if (error)
986 goto out_trans_cancel;
987
988
989
990
991
992
993
994
995 xfs_iflags_set(ip, XFS_ITRUNCATED);
996
997
998 xfs_inode_clear_eofblocks_tag(ip);
999 }
1000
1001 if (iattr->ia_valid & ATTR_MODE)
1002 xfs_setattr_mode(ip, iattr);
1003 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
1004 xfs_setattr_time(ip, iattr);
1005
1006 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1007
1008 XFS_STATS_INC(mp, xs_ig_attrchg);
1009
1010 if (mp->m_flags & XFS_MOUNT_WSYNC)
1011 xfs_trans_set_sync(tp);
1012
1013 error = xfs_trans_commit(tp);
1014out_unlock:
1015 if (lock_flags)
1016 xfs_iunlock(ip, lock_flags);
1017 return error;
1018
1019out_trans_cancel:
1020 xfs_trans_cancel(tp);
1021 goto out_unlock;
1022}
1023
1024int
1025xfs_vn_setattr_size(
1026 struct dentry *dentry,
1027 struct iattr *iattr)
1028{
1029 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1030 int error;
1031
1032 trace_xfs_setattr(ip);
1033
1034 error = xfs_vn_change_ok(dentry, iattr);
1035 if (error)
1036 return error;
1037 return xfs_setattr_size(ip, iattr);
1038}
1039
1040STATIC int
1041xfs_vn_setattr(
1042 struct dentry *dentry,
1043 struct iattr *iattr)
1044{
1045 int error;
1046
1047 if (iattr->ia_valid & ATTR_SIZE) {
1048 struct inode *inode = d_inode(dentry);
1049 struct xfs_inode *ip = XFS_I(inode);
1050 uint iolock;
1051
1052 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
1053 iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
1054
1055 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
1056 if (error) {
1057 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
1058 return error;
1059 }
1060
1061 error = xfs_vn_setattr_size(dentry, iattr);
1062 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
1063 } else {
1064 error = xfs_vn_setattr_nonsize(dentry, iattr);
1065 }
1066
1067 return error;
1068}
1069
1070STATIC int
1071xfs_vn_update_time(
1072 struct inode *inode,
1073 struct timespec64 *now,
1074 int flags)
1075{
1076 struct xfs_inode *ip = XFS_I(inode);
1077 struct xfs_mount *mp = ip->i_mount;
1078 int log_flags = XFS_ILOG_TIMESTAMP;
1079 struct xfs_trans *tp;
1080 int error;
1081
1082 trace_xfs_update_time(ip);
1083
1084 if (inode->i_sb->s_flags & SB_LAZYTIME) {
1085 if (!((flags & S_VERSION) &&
1086 inode_maybe_inc_iversion(inode, false)))
1087 return generic_update_time(inode, now, flags);
1088
1089
1090 log_flags |= XFS_ILOG_CORE;
1091 }
1092
1093 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
1094 if (error)
1095 return error;
1096
1097 xfs_ilock(ip, XFS_ILOCK_EXCL);
1098 if (flags & S_CTIME)
1099 inode->i_ctime = *now;
1100 if (flags & S_MTIME)
1101 inode->i_mtime = *now;
1102 if (flags & S_ATIME)
1103 inode->i_atime = *now;
1104
1105 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1106 xfs_trans_log_inode(tp, ip, log_flags);
1107 return xfs_trans_commit(tp);
1108}
1109
1110STATIC int
1111xfs_vn_fiemap(
1112 struct inode *inode,
1113 struct fiemap_extent_info *fieinfo,
1114 u64 start,
1115 u64 length)
1116{
1117 int error;
1118
1119 xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED);
1120 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1121 fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;
1122 error = iomap_fiemap(inode, fieinfo, start, length,
1123 &xfs_xattr_iomap_ops);
1124 } else {
1125 error = iomap_fiemap(inode, fieinfo, start, length,
1126 &xfs_iomap_ops);
1127 }
1128 xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED);
1129
1130 return error;
1131}
1132
1133STATIC int
1134xfs_vn_tmpfile(
1135 struct inode *dir,
1136 struct dentry *dentry,
1137 umode_t mode)
1138{
1139 return xfs_generic_create(dir, dentry, mode, 0, true);
1140}
1141
1142static const struct inode_operations xfs_inode_operations = {
1143 .get_acl = xfs_get_acl,
1144 .set_acl = xfs_set_acl,
1145 .getattr = xfs_vn_getattr,
1146 .setattr = xfs_vn_setattr,
1147 .listxattr = xfs_vn_listxattr,
1148 .fiemap = xfs_vn_fiemap,
1149 .update_time = xfs_vn_update_time,
1150};
1151
1152static const struct inode_operations xfs_dir_inode_operations = {
1153 .create = xfs_vn_create,
1154 .lookup = xfs_vn_lookup,
1155 .link = xfs_vn_link,
1156 .unlink = xfs_vn_unlink,
1157 .symlink = xfs_vn_symlink,
1158 .mkdir = xfs_vn_mkdir,
1159
1160
1161
1162
1163
1164
1165 .rmdir = xfs_vn_unlink,
1166 .mknod = xfs_vn_mknod,
1167 .rename = xfs_vn_rename,
1168 .get_acl = xfs_get_acl,
1169 .set_acl = xfs_set_acl,
1170 .getattr = xfs_vn_getattr,
1171 .setattr = xfs_vn_setattr,
1172 .listxattr = xfs_vn_listxattr,
1173 .update_time = xfs_vn_update_time,
1174 .tmpfile = xfs_vn_tmpfile,
1175};
1176
1177static const struct inode_operations xfs_dir_ci_inode_operations = {
1178 .create = xfs_vn_create,
1179 .lookup = xfs_vn_ci_lookup,
1180 .link = xfs_vn_link,
1181 .unlink = xfs_vn_unlink,
1182 .symlink = xfs_vn_symlink,
1183 .mkdir = xfs_vn_mkdir,
1184
1185
1186
1187
1188
1189
1190 .rmdir = xfs_vn_unlink,
1191 .mknod = xfs_vn_mknod,
1192 .rename = xfs_vn_rename,
1193 .get_acl = xfs_get_acl,
1194 .set_acl = xfs_set_acl,
1195 .getattr = xfs_vn_getattr,
1196 .setattr = xfs_vn_setattr,
1197 .listxattr = xfs_vn_listxattr,
1198 .update_time = xfs_vn_update_time,
1199 .tmpfile = xfs_vn_tmpfile,
1200};
1201
1202static const struct inode_operations xfs_symlink_inode_operations = {
1203 .get_link = xfs_vn_get_link,
1204 .getattr = xfs_vn_getattr,
1205 .setattr = xfs_vn_setattr,
1206 .listxattr = xfs_vn_listxattr,
1207 .update_time = xfs_vn_update_time,
1208};
1209
1210static const struct inode_operations xfs_inline_symlink_inode_operations = {
1211 .get_link = xfs_vn_get_link_inline,
1212 .getattr = xfs_vn_getattr,
1213 .setattr = xfs_vn_setattr,
1214 .listxattr = xfs_vn_listxattr,
1215 .update_time = xfs_vn_update_time,
1216};
1217
1218
1219static bool
1220xfs_inode_supports_dax(
1221 struct xfs_inode *ip)
1222{
1223 struct xfs_mount *mp = ip->i_mount;
1224
1225
1226 if (!S_ISREG(VFS_I(ip)->i_mode) || xfs_is_reflink_inode(ip))
1227 return false;
1228
1229
1230 if (!(mp->m_flags & XFS_MOUNT_DAX) &&
1231 !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
1232 return false;
1233
1234
1235 if (mp->m_sb.sb_blocksize != PAGE_SIZE)
1236 return false;
1237
1238
1239 return xfs_find_daxdev_for_inode(VFS_I(ip)) != NULL;
1240}
1241
1242STATIC void
1243xfs_diflags_to_iflags(
1244 struct inode *inode,
1245 struct xfs_inode *ip)
1246{
1247 uint16_t flags = ip->i_d.di_flags;
1248
1249 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC |
1250 S_NOATIME | S_DAX);
1251
1252 if (flags & XFS_DIFLAG_IMMUTABLE)
1253 inode->i_flags |= S_IMMUTABLE;
1254 if (flags & XFS_DIFLAG_APPEND)
1255 inode->i_flags |= S_APPEND;
1256 if (flags & XFS_DIFLAG_SYNC)
1257 inode->i_flags |= S_SYNC;
1258 if (flags & XFS_DIFLAG_NOATIME)
1259 inode->i_flags |= S_NOATIME;
1260 if (xfs_inode_supports_dax(ip))
1261 inode->i_flags |= S_DAX;
1262}
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272void
1273xfs_setup_inode(
1274 struct xfs_inode *ip)
1275{
1276 struct inode *inode = &ip->i_vnode;
1277 gfp_t gfp_mask;
1278
1279 inode->i_ino = ip->i_ino;
1280 inode->i_state = I_NEW;
1281
1282 inode_sb_list_add(inode);
1283
1284 inode_fake_hash(inode);
1285
1286 inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid);
1287 inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid);
1288
1289 i_size_write(inode, ip->i_d.di_size);
1290 xfs_diflags_to_iflags(inode, ip);
1291
1292 if (S_ISDIR(inode->i_mode)) {
1293
1294
1295
1296
1297
1298
1299 lockdep_set_class(&inode->i_rwsem,
1300 &inode->i_sb->s_type->i_mutex_dir_key);
1301 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
1302 ip->d_ops = ip->i_mount->m_dir_inode_ops;
1303 } else {
1304 ip->d_ops = ip->i_mount->m_nondir_inode_ops;
1305 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
1306 }
1307
1308
1309
1310
1311
1312
1313 gfp_mask = mapping_gfp_mask(inode->i_mapping);
1314 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
1315
1316
1317
1318
1319
1320 if (!XFS_IFORK_Q(ip)) {
1321 inode_has_no_xattr(inode);
1322 cache_no_acl(inode);
1323 }
1324}
1325
1326void
1327xfs_setup_iops(
1328 struct xfs_inode *ip)
1329{
1330 struct inode *inode = &ip->i_vnode;
1331
1332 switch (inode->i_mode & S_IFMT) {
1333 case S_IFREG:
1334 inode->i_op = &xfs_inode_operations;
1335 inode->i_fop = &xfs_file_operations;
1336 if (IS_DAX(inode))
1337 inode->i_mapping->a_ops = &xfs_dax_aops;
1338 else
1339 inode->i_mapping->a_ops = &xfs_address_space_operations;
1340 break;
1341 case S_IFDIR:
1342 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1343 inode->i_op = &xfs_dir_ci_inode_operations;
1344 else
1345 inode->i_op = &xfs_dir_inode_operations;
1346 inode->i_fop = &xfs_dir_file_operations;
1347 break;
1348 case S_IFLNK:
1349 if (ip->i_df.if_flags & XFS_IFINLINE)
1350 inode->i_op = &xfs_inline_symlink_inode_operations;
1351 else
1352 inode->i_op = &xfs_symlink_inode_operations;
1353 break;
1354 default:
1355 inode->i_op = &xfs_inode_operations;
1356 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1357 break;
1358 }
1359}
1360