1
2
3
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_inode.h"
14#include "xfs_acl.h"
15#include "xfs_quota.h"
16#include "xfs_attr.h"
17#include "xfs_trans.h"
18#include "xfs_trace.h"
19#include "xfs_icache.h"
20#include "xfs_symlink.h"
21#include "xfs_dir2.h"
22#include "xfs_iomap.h"
23#include "xfs_error.h"
24#include "xfs_ioctl.h"
25
26#include <linux/posix_acl.h>
27#include <linux/security.h>
28#include <linux/iversion.h>
29#include <linux/fiemap.h>
30
31
32
33
34
35
36
37
38
39
40static struct lock_class_key xfs_nondir_ilock_class;
41static struct lock_class_key xfs_dir_ilock_class;
42
43static int
44xfs_initxattrs(
45 struct inode *inode,
46 const struct xattr *xattr_array,
47 void *fs_info)
48{
49 const struct xattr *xattr;
50 struct xfs_inode *ip = XFS_I(inode);
51 int error = 0;
52
53 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
54 struct xfs_da_args args = {
55 .dp = ip,
56 .attr_filter = XFS_ATTR_SECURE,
57 .name = xattr->name,
58 .namelen = strlen(xattr->name),
59 .value = xattr->value,
60 .valuelen = xattr->value_len,
61 };
62 error = xfs_attr_set(&args);
63 if (error < 0)
64 break;
65 }
66 return error;
67}
68
69
70
71
72
73
74
75
76STATIC int
77xfs_init_security(
78 struct inode *inode,
79 struct inode *dir,
80 const struct qstr *qstr)
81{
82 return security_inode_init_security(inode, dir, qstr,
83 &xfs_initxattrs, NULL);
84}
85
86static void
87xfs_dentry_to_name(
88 struct xfs_name *namep,
89 struct dentry *dentry)
90{
91 namep->name = dentry->d_name.name;
92 namep->len = dentry->d_name.len;
93 namep->type = XFS_DIR3_FT_UNKNOWN;
94}
95
96static int
97xfs_dentry_mode_to_name(
98 struct xfs_name *namep,
99 struct dentry *dentry,
100 int mode)
101{
102 namep->name = dentry->d_name.name;
103 namep->len = dentry->d_name.len;
104 namep->type = xfs_mode_to_ftype(mode);
105
106 if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN))
107 return -EFSCORRUPTED;
108
109 return 0;
110}
111
112STATIC void
113xfs_cleanup_inode(
114 struct inode *dir,
115 struct inode *inode,
116 struct dentry *dentry)
117{
118 struct xfs_name teardown;
119
120
121
122
123
124
125 xfs_dentry_to_name(&teardown, dentry);
126
127 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
128}
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143static inline bool
144xfs_create_need_xattr(
145 struct inode *dir,
146 struct posix_acl *default_acl,
147 struct posix_acl *acl)
148{
149 if (acl)
150 return true;
151 if (default_acl)
152 return true;
153#if IS_ENABLED(CONFIG_SECURITY)
154 if (dir->i_sb->s_security)
155 return true;
156#endif
157 return false;
158}
159
160
161STATIC int
162xfs_generic_create(
163 struct user_namespace *mnt_userns,
164 struct inode *dir,
165 struct dentry *dentry,
166 umode_t mode,
167 dev_t rdev,
168 bool tmpfile)
169{
170 struct inode *inode;
171 struct xfs_inode *ip = NULL;
172 struct posix_acl *default_acl, *acl;
173 struct xfs_name name;
174 int error;
175
176
177
178
179
180 if (S_ISCHR(mode) || S_ISBLK(mode)) {
181 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
182 return -EINVAL;
183 } else {
184 rdev = 0;
185 }
186
187 error = posix_acl_create(dir, &mode, &default_acl, &acl);
188 if (error)
189 return error;
190
191
192 error = xfs_dentry_mode_to_name(&name, dentry, mode);
193 if (unlikely(error))
194 goto out_free_acl;
195
196 if (!tmpfile) {
197 error = xfs_create(mnt_userns, XFS_I(dir), &name, mode, rdev,
198 xfs_create_need_xattr(dir, default_acl, acl),
199 &ip);
200 } else {
201 error = xfs_create_tmpfile(mnt_userns, XFS_I(dir), mode, &ip);
202 }
203 if (unlikely(error))
204 goto out_free_acl;
205
206 inode = VFS_I(ip);
207
208 error = xfs_init_security(inode, dir, &dentry->d_name);
209 if (unlikely(error))
210 goto out_cleanup_inode;
211
212#ifdef CONFIG_XFS_POSIX_ACL
213 if (default_acl) {
214 error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
215 if (error)
216 goto out_cleanup_inode;
217 }
218 if (acl) {
219 error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
220 if (error)
221 goto out_cleanup_inode;
222 }
223#endif
224
225 xfs_setup_iops(ip);
226
227 if (tmpfile) {
228
229
230
231
232
233
234
235
236 set_nlink(inode, 1);
237 d_tmpfile(dentry, inode);
238 } else
239 d_instantiate(dentry, inode);
240
241 xfs_finish_inode_setup(ip);
242
243 out_free_acl:
244 posix_acl_release(default_acl);
245 posix_acl_release(acl);
246 return error;
247
248 out_cleanup_inode:
249 xfs_finish_inode_setup(ip);
250 if (!tmpfile)
251 xfs_cleanup_inode(dir, inode, dentry);
252 xfs_irele(ip);
253 goto out_free_acl;
254}
255
256STATIC int
257xfs_vn_mknod(
258 struct user_namespace *mnt_userns,
259 struct inode *dir,
260 struct dentry *dentry,
261 umode_t mode,
262 dev_t rdev)
263{
264 return xfs_generic_create(mnt_userns, dir, dentry, mode, rdev, false);
265}
266
267STATIC int
268xfs_vn_create(
269 struct user_namespace *mnt_userns,
270 struct inode *dir,
271 struct dentry *dentry,
272 umode_t mode,
273 bool flags)
274{
275 return xfs_generic_create(mnt_userns, dir, dentry, mode, 0, false);
276}
277
278STATIC int
279xfs_vn_mkdir(
280 struct user_namespace *mnt_userns,
281 struct inode *dir,
282 struct dentry *dentry,
283 umode_t mode)
284{
285 return xfs_generic_create(mnt_userns, dir, dentry, mode | S_IFDIR, 0,
286 false);
287}
288
289STATIC struct dentry *
290xfs_vn_lookup(
291 struct inode *dir,
292 struct dentry *dentry,
293 unsigned int flags)
294{
295 struct inode *inode;
296 struct xfs_inode *cip;
297 struct xfs_name name;
298 int error;
299
300 if (dentry->d_name.len >= MAXNAMELEN)
301 return ERR_PTR(-ENAMETOOLONG);
302
303 xfs_dentry_to_name(&name, dentry);
304 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
305 if (likely(!error))
306 inode = VFS_I(cip);
307 else if (likely(error == -ENOENT))
308 inode = NULL;
309 else
310 inode = ERR_PTR(error);
311 return d_splice_alias(inode, dentry);
312}
313
314STATIC struct dentry *
315xfs_vn_ci_lookup(
316 struct inode *dir,
317 struct dentry *dentry,
318 unsigned int flags)
319{
320 struct xfs_inode *ip;
321 struct xfs_name xname;
322 struct xfs_name ci_name;
323 struct qstr dname;
324 int error;
325
326 if (dentry->d_name.len >= MAXNAMELEN)
327 return ERR_PTR(-ENAMETOOLONG);
328
329 xfs_dentry_to_name(&xname, dentry);
330 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
331 if (unlikely(error)) {
332 if (unlikely(error != -ENOENT))
333 return ERR_PTR(error);
334
335
336
337
338
339 return NULL;
340 }
341
342
343 if (!ci_name.name)
344 return d_splice_alias(VFS_I(ip), dentry);
345
346
347 dname.name = ci_name.name;
348 dname.len = ci_name.len;
349 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
350 kmem_free(ci_name.name);
351 return dentry;
352}
353
354STATIC int
355xfs_vn_link(
356 struct dentry *old_dentry,
357 struct inode *dir,
358 struct dentry *dentry)
359{
360 struct inode *inode = d_inode(old_dentry);
361 struct xfs_name name;
362 int error;
363
364 error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode);
365 if (unlikely(error))
366 return error;
367
368 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
369 if (unlikely(error))
370 return error;
371
372 ihold(inode);
373 d_instantiate(dentry, inode);
374 return 0;
375}
376
377STATIC int
378xfs_vn_unlink(
379 struct inode *dir,
380 struct dentry *dentry)
381{
382 struct xfs_name name;
383 int error;
384
385 xfs_dentry_to_name(&name, dentry);
386
387 error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
388 if (error)
389 return error;
390
391
392
393
394
395
396 if (xfs_has_asciici(XFS_M(dir->i_sb)))
397 d_invalidate(dentry);
398 return 0;
399}
400
401STATIC int
402xfs_vn_symlink(
403 struct user_namespace *mnt_userns,
404 struct inode *dir,
405 struct dentry *dentry,
406 const char *symname)
407{
408 struct inode *inode;
409 struct xfs_inode *cip = NULL;
410 struct xfs_name name;
411 int error;
412 umode_t mode;
413
414 mode = S_IFLNK |
415 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
416 error = xfs_dentry_mode_to_name(&name, dentry, mode);
417 if (unlikely(error))
418 goto out;
419
420 error = xfs_symlink(mnt_userns, XFS_I(dir), &name, symname, mode, &cip);
421 if (unlikely(error))
422 goto out;
423
424 inode = VFS_I(cip);
425
426 error = xfs_init_security(inode, dir, &dentry->d_name);
427 if (unlikely(error))
428 goto out_cleanup_inode;
429
430 xfs_setup_iops(cip);
431
432 d_instantiate(dentry, inode);
433 xfs_finish_inode_setup(cip);
434 return 0;
435
436 out_cleanup_inode:
437 xfs_finish_inode_setup(cip);
438 xfs_cleanup_inode(dir, inode, dentry);
439 xfs_irele(cip);
440 out:
441 return error;
442}
443
444STATIC int
445xfs_vn_rename(
446 struct user_namespace *mnt_userns,
447 struct inode *odir,
448 struct dentry *odentry,
449 struct inode *ndir,
450 struct dentry *ndentry,
451 unsigned int flags)
452{
453 struct inode *new_inode = d_inode(ndentry);
454 int omode = 0;
455 int error;
456 struct xfs_name oname;
457 struct xfs_name nname;
458
459 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
460 return -EINVAL;
461
462
463 if (flags & RENAME_EXCHANGE)
464 omode = d_inode(ndentry)->i_mode;
465
466 error = xfs_dentry_mode_to_name(&oname, odentry, omode);
467 if (omode && unlikely(error))
468 return error;
469
470 error = xfs_dentry_mode_to_name(&nname, ndentry,
471 d_inode(odentry)->i_mode);
472 if (unlikely(error))
473 return error;
474
475 return xfs_rename(mnt_userns, XFS_I(odir), &oname,
476 XFS_I(d_inode(odentry)), XFS_I(ndir), &nname,
477 new_inode ? XFS_I(new_inode) : NULL, flags);
478}
479
480
481
482
483
484
485STATIC const char *
486xfs_vn_get_link(
487 struct dentry *dentry,
488 struct inode *inode,
489 struct delayed_call *done)
490{
491 char *link;
492 int error = -ENOMEM;
493
494 if (!dentry)
495 return ERR_PTR(-ECHILD);
496
497 link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL);
498 if (!link)
499 goto out_err;
500
501 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
502 if (unlikely(error))
503 goto out_kfree;
504
505 set_delayed_call(done, kfree_link, link);
506 return link;
507
508 out_kfree:
509 kfree(link);
510 out_err:
511 return ERR_PTR(error);
512}
513
514STATIC const char *
515xfs_vn_get_link_inline(
516 struct dentry *dentry,
517 struct inode *inode,
518 struct delayed_call *done)
519{
520 struct xfs_inode *ip = XFS_I(inode);
521 char *link;
522
523 ASSERT(ip->i_df.if_format == XFS_DINODE_FMT_LOCAL);
524
525
526
527
528
529 link = ip->i_df.if_u1.if_data;
530 if (XFS_IS_CORRUPT(ip->i_mount, !link))
531 return ERR_PTR(-EFSCORRUPTED);
532 return link;
533}
534
535static uint32_t
536xfs_stat_blksize(
537 struct xfs_inode *ip)
538{
539 struct xfs_mount *mp = ip->i_mount;
540
541
542
543
544
545 if (XFS_IS_REALTIME_INODE(ip))
546 return XFS_FSB_TO_B(mp, xfs_get_extsz_hint(ip));
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561 if (xfs_has_large_iosize(mp)) {
562 if (mp->m_swidth)
563 return XFS_FSB_TO_B(mp, mp->m_swidth);
564 if (xfs_has_allocsize(mp))
565 return 1U << mp->m_allocsize_log;
566 }
567
568 return PAGE_SIZE;
569}
570
571STATIC int
572xfs_vn_getattr(
573 struct user_namespace *mnt_userns,
574 const struct path *path,
575 struct kstat *stat,
576 u32 request_mask,
577 unsigned int query_flags)
578{
579 struct inode *inode = d_inode(path->dentry);
580 struct xfs_inode *ip = XFS_I(inode);
581 struct xfs_mount *mp = ip->i_mount;
582
583 trace_xfs_getattr(ip);
584
585 if (xfs_is_shutdown(mp))
586 return -EIO;
587
588 stat->size = XFS_ISIZE(ip);
589 stat->dev = inode->i_sb->s_dev;
590 stat->mode = inode->i_mode;
591 stat->nlink = inode->i_nlink;
592 stat->uid = i_uid_into_mnt(mnt_userns, inode);
593 stat->gid = i_gid_into_mnt(mnt_userns, inode);
594 stat->ino = ip->i_ino;
595 stat->atime = inode->i_atime;
596 stat->mtime = inode->i_mtime;
597 stat->ctime = inode->i_ctime;
598 stat->blocks = XFS_FSB_TO_BB(mp, ip->i_nblocks + ip->i_delayed_blks);
599
600 if (xfs_has_v3inodes(mp)) {
601 if (request_mask & STATX_BTIME) {
602 stat->result_mask |= STATX_BTIME;
603 stat->btime = ip->i_crtime;
604 }
605 }
606
607
608
609
610
611 if (ip->i_diflags & XFS_DIFLAG_IMMUTABLE)
612 stat->attributes |= STATX_ATTR_IMMUTABLE;
613 if (ip->i_diflags & XFS_DIFLAG_APPEND)
614 stat->attributes |= STATX_ATTR_APPEND;
615 if (ip->i_diflags & XFS_DIFLAG_NODUMP)
616 stat->attributes |= STATX_ATTR_NODUMP;
617
618 stat->attributes_mask |= (STATX_ATTR_IMMUTABLE |
619 STATX_ATTR_APPEND |
620 STATX_ATTR_NODUMP);
621
622 switch (inode->i_mode & S_IFMT) {
623 case S_IFBLK:
624 case S_IFCHR:
625 stat->blksize = BLKDEV_IOSIZE;
626 stat->rdev = inode->i_rdev;
627 break;
628 default:
629 stat->blksize = xfs_stat_blksize(ip);
630 stat->rdev = 0;
631 break;
632 }
633
634 return 0;
635}
636
637static void
638xfs_setattr_mode(
639 struct xfs_inode *ip,
640 struct iattr *iattr)
641{
642 struct inode *inode = VFS_I(ip);
643 umode_t mode = iattr->ia_mode;
644
645 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
646
647 inode->i_mode &= S_IFMT;
648 inode->i_mode |= mode & ~S_IFMT;
649}
650
651void
652xfs_setattr_time(
653 struct xfs_inode *ip,
654 struct iattr *iattr)
655{
656 struct inode *inode = VFS_I(ip);
657
658 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
659
660 if (iattr->ia_valid & ATTR_ATIME)
661 inode->i_atime = iattr->ia_atime;
662 if (iattr->ia_valid & ATTR_CTIME)
663 inode->i_ctime = iattr->ia_ctime;
664 if (iattr->ia_valid & ATTR_MTIME)
665 inode->i_mtime = iattr->ia_mtime;
666}
667
668static int
669xfs_vn_change_ok(
670 struct user_namespace *mnt_userns,
671 struct dentry *dentry,
672 struct iattr *iattr)
673{
674 struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount;
675
676 if (xfs_is_readonly(mp))
677 return -EROFS;
678
679 if (xfs_is_shutdown(mp))
680 return -EIO;
681
682 return setattr_prepare(mnt_userns, dentry, iattr);
683}
684
685
686
687
688
689
690
691static int
692xfs_setattr_nonsize(
693 struct user_namespace *mnt_userns,
694 struct xfs_inode *ip,
695 struct iattr *iattr)
696{
697 xfs_mount_t *mp = ip->i_mount;
698 struct inode *inode = VFS_I(ip);
699 int mask = iattr->ia_valid;
700 xfs_trans_t *tp;
701 int error;
702 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
703 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
704 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
705 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
706
707 ASSERT((mask & ATTR_SIZE) == 0);
708
709
710
711
712
713
714
715
716
717 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
718 uint qflags = 0;
719
720 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
721 uid = iattr->ia_uid;
722 qflags |= XFS_QMOPT_UQUOTA;
723 } else {
724 uid = inode->i_uid;
725 }
726 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
727 gid = iattr->ia_gid;
728 qflags |= XFS_QMOPT_GQUOTA;
729 } else {
730 gid = inode->i_gid;
731 }
732
733
734
735
736
737
738 ASSERT(udqp == NULL);
739 ASSERT(gdqp == NULL);
740 error = xfs_qm_vop_dqalloc(ip, uid, gid, ip->i_projid,
741 qflags, &udqp, &gdqp, NULL);
742 if (error)
743 return error;
744 }
745
746 error = xfs_trans_alloc_ichange(ip, udqp, gdqp, NULL,
747 capable(CAP_FOWNER), &tp);
748 if (error)
749 goto out_dqrele;
750
751
752
753
754 if (mask & (ATTR_UID|ATTR_GID)) {
755
756
757
758
759
760
761 iuid = inode->i_uid;
762 igid = inode->i_gid;
763 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
764 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
765
766
767
768
769
770
771
772 if ((inode->i_mode & (S_ISUID|S_ISGID)) &&
773 !capable(CAP_FSETID))
774 inode->i_mode &= ~(S_ISUID|S_ISGID);
775
776
777
778
779
780 if (!uid_eq(iuid, uid)) {
781 if (XFS_IS_UQUOTA_ON(mp)) {
782 ASSERT(mask & ATTR_UID);
783 ASSERT(udqp);
784 olddquot1 = xfs_qm_vop_chown(tp, ip,
785 &ip->i_udquot, udqp);
786 }
787 inode->i_uid = uid;
788 }
789 if (!gid_eq(igid, gid)) {
790 if (XFS_IS_GQUOTA_ON(mp)) {
791 ASSERT(xfs_has_pquotino(mp) ||
792 !XFS_IS_PQUOTA_ON(mp));
793 ASSERT(mask & ATTR_GID);
794 ASSERT(gdqp);
795 olddquot2 = xfs_qm_vop_chown(tp, ip,
796 &ip->i_gdquot, gdqp);
797 }
798 inode->i_gid = gid;
799 }
800 }
801
802 if (mask & ATTR_MODE)
803 xfs_setattr_mode(ip, iattr);
804 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
805 xfs_setattr_time(ip, iattr);
806
807 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
808
809 XFS_STATS_INC(mp, xs_ig_attrchg);
810
811 if (xfs_has_wsync(mp))
812 xfs_trans_set_sync(tp);
813 error = xfs_trans_commit(tp);
814
815
816
817
818 xfs_qm_dqrele(olddquot1);
819 xfs_qm_dqrele(olddquot2);
820 xfs_qm_dqrele(udqp);
821 xfs_qm_dqrele(gdqp);
822
823 if (error)
824 return error;
825
826
827
828
829
830
831
832
833 if (mask & ATTR_MODE) {
834 error = posix_acl_chmod(mnt_userns, inode, inode->i_mode);
835 if (error)
836 return error;
837 }
838
839 return 0;
840
841out_dqrele:
842 xfs_qm_dqrele(udqp);
843 xfs_qm_dqrele(gdqp);
844 return error;
845}
846
847
848
849
850
851
852
853STATIC int
854xfs_setattr_size(
855 struct user_namespace *mnt_userns,
856 struct xfs_inode *ip,
857 struct iattr *iattr)
858{
859 struct xfs_mount *mp = ip->i_mount;
860 struct inode *inode = VFS_I(ip);
861 xfs_off_t oldsize, newsize;
862 struct xfs_trans *tp;
863 int error;
864 uint lock_flags = 0;
865 bool did_zeroing = false;
866
867 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
868 ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
869 ASSERT(S_ISREG(inode->i_mode));
870 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
871 ATTR_MTIME_SET|ATTR_TIMES_SET)) == 0);
872
873 oldsize = inode->i_size;
874 newsize = iattr->ia_size;
875
876
877
878
879 if (newsize == 0 && oldsize == 0 && ip->i_df.if_nextents == 0) {
880 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
881 return 0;
882
883
884
885
886 iattr->ia_valid &= ~ATTR_SIZE;
887 return xfs_setattr_nonsize(mnt_userns, ip, iattr);
888 }
889
890
891
892
893 error = xfs_qm_dqattach(ip);
894 if (error)
895 return error;
896
897
898
899
900 inode_dio_wait(inode);
901
902
903
904
905
906
907
908
909
910
911
912 if (newsize > oldsize) {
913 trace_xfs_zero_eof(ip, oldsize, newsize - oldsize);
914 error = iomap_zero_range(inode, oldsize, newsize - oldsize,
915 &did_zeroing, &xfs_buffered_write_iomap_ops);
916 } else {
917
918
919
920
921
922
923 error = filemap_write_and_wait_range(inode->i_mapping, newsize,
924 newsize);
925 if (error)
926 return error;
927 error = iomap_truncate_page(inode, newsize, &did_zeroing,
928 &xfs_buffered_write_iomap_ops);
929 }
930
931 if (error)
932 return error;
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955 truncate_setsize(inode, newsize);
956
957
958
959
960
961
962
963
964
965 if (did_zeroing ||
966 (newsize > ip->i_disk_size && oldsize != ip->i_disk_size)) {
967 error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
968 ip->i_disk_size, newsize - 1);
969 if (error)
970 return error;
971 }
972
973 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
974 if (error)
975 return error;
976
977 lock_flags |= XFS_ILOCK_EXCL;
978 xfs_ilock(ip, XFS_ILOCK_EXCL);
979 xfs_trans_ijoin(tp, ip, 0);
980
981
982
983
984
985
986
987
988
989
990
991 if (newsize != oldsize &&
992 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
993 iattr->ia_ctime = iattr->ia_mtime =
994 current_time(inode);
995 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
996 }
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010 ip->i_disk_size = newsize;
1011 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1012
1013 if (newsize <= oldsize) {
1014 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
1015 if (error)
1016 goto out_trans_cancel;
1017
1018
1019
1020
1021
1022
1023
1024
1025 xfs_iflags_set(ip, XFS_ITRUNCATED);
1026
1027
1028 xfs_inode_clear_eofblocks_tag(ip);
1029 }
1030
1031 if (iattr->ia_valid & ATTR_MODE)
1032 xfs_setattr_mode(ip, iattr);
1033 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
1034 xfs_setattr_time(ip, iattr);
1035
1036 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1037
1038 XFS_STATS_INC(mp, xs_ig_attrchg);
1039
1040 if (xfs_has_wsync(mp))
1041 xfs_trans_set_sync(tp);
1042
1043 error = xfs_trans_commit(tp);
1044out_unlock:
1045 if (lock_flags)
1046 xfs_iunlock(ip, lock_flags);
1047 return error;
1048
1049out_trans_cancel:
1050 xfs_trans_cancel(tp);
1051 goto out_unlock;
1052}
1053
1054int
1055xfs_vn_setattr_size(
1056 struct user_namespace *mnt_userns,
1057 struct dentry *dentry,
1058 struct iattr *iattr)
1059{
1060 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1061 int error;
1062
1063 trace_xfs_setattr(ip);
1064
1065 error = xfs_vn_change_ok(mnt_userns, dentry, iattr);
1066 if (error)
1067 return error;
1068 return xfs_setattr_size(mnt_userns, ip, iattr);
1069}
1070
1071STATIC int
1072xfs_vn_setattr(
1073 struct user_namespace *mnt_userns,
1074 struct dentry *dentry,
1075 struct iattr *iattr)
1076{
1077 struct inode *inode = d_inode(dentry);
1078 struct xfs_inode *ip = XFS_I(inode);
1079 int error;
1080
1081 if (iattr->ia_valid & ATTR_SIZE) {
1082 uint iolock;
1083
1084 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
1085 iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
1086
1087 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
1088 if (error) {
1089 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
1090 return error;
1091 }
1092
1093 error = xfs_vn_setattr_size(mnt_userns, dentry, iattr);
1094 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
1095 } else {
1096 trace_xfs_setattr(ip);
1097
1098 error = xfs_vn_change_ok(mnt_userns, dentry, iattr);
1099 if (!error)
1100 error = xfs_setattr_nonsize(mnt_userns, ip, iattr);
1101 }
1102
1103 return error;
1104}
1105
1106STATIC int
1107xfs_vn_update_time(
1108 struct inode *inode,
1109 struct timespec64 *now,
1110 int flags)
1111{
1112 struct xfs_inode *ip = XFS_I(inode);
1113 struct xfs_mount *mp = ip->i_mount;
1114 int log_flags = XFS_ILOG_TIMESTAMP;
1115 struct xfs_trans *tp;
1116 int error;
1117
1118 trace_xfs_update_time(ip);
1119
1120 if (inode->i_sb->s_flags & SB_LAZYTIME) {
1121 if (!((flags & S_VERSION) &&
1122 inode_maybe_inc_iversion(inode, false)))
1123 return generic_update_time(inode, now, flags);
1124
1125
1126 log_flags |= XFS_ILOG_CORE;
1127 }
1128
1129 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
1130 if (error)
1131 return error;
1132
1133 xfs_ilock(ip, XFS_ILOCK_EXCL);
1134 if (flags & S_CTIME)
1135 inode->i_ctime = *now;
1136 if (flags & S_MTIME)
1137 inode->i_mtime = *now;
1138 if (flags & S_ATIME)
1139 inode->i_atime = *now;
1140
1141 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1142 xfs_trans_log_inode(tp, ip, log_flags);
1143 return xfs_trans_commit(tp);
1144}
1145
1146STATIC int
1147xfs_vn_fiemap(
1148 struct inode *inode,
1149 struct fiemap_extent_info *fieinfo,
1150 u64 start,
1151 u64 length)
1152{
1153 int error;
1154
1155 xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED);
1156 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1157 fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;
1158 error = iomap_fiemap(inode, fieinfo, start, length,
1159 &xfs_xattr_iomap_ops);
1160 } else {
1161 error = iomap_fiemap(inode, fieinfo, start, length,
1162 &xfs_read_iomap_ops);
1163 }
1164 xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED);
1165
1166 return error;
1167}
1168
1169STATIC int
1170xfs_vn_tmpfile(
1171 struct user_namespace *mnt_userns,
1172 struct inode *dir,
1173 struct dentry *dentry,
1174 umode_t mode)
1175{
1176 return xfs_generic_create(mnt_userns, dir, dentry, mode, 0, true);
1177}
1178
1179static const struct inode_operations xfs_inode_operations = {
1180 .get_acl = xfs_get_acl,
1181 .set_acl = xfs_set_acl,
1182 .getattr = xfs_vn_getattr,
1183 .setattr = xfs_vn_setattr,
1184 .listxattr = xfs_vn_listxattr,
1185 .fiemap = xfs_vn_fiemap,
1186 .update_time = xfs_vn_update_time,
1187 .fileattr_get = xfs_fileattr_get,
1188 .fileattr_set = xfs_fileattr_set,
1189};
1190
1191static const struct inode_operations xfs_dir_inode_operations = {
1192 .create = xfs_vn_create,
1193 .lookup = xfs_vn_lookup,
1194 .link = xfs_vn_link,
1195 .unlink = xfs_vn_unlink,
1196 .symlink = xfs_vn_symlink,
1197 .mkdir = xfs_vn_mkdir,
1198
1199
1200
1201
1202
1203
1204 .rmdir = xfs_vn_unlink,
1205 .mknod = xfs_vn_mknod,
1206 .rename = xfs_vn_rename,
1207 .get_acl = xfs_get_acl,
1208 .set_acl = xfs_set_acl,
1209 .getattr = xfs_vn_getattr,
1210 .setattr = xfs_vn_setattr,
1211 .listxattr = xfs_vn_listxattr,
1212 .update_time = xfs_vn_update_time,
1213 .tmpfile = xfs_vn_tmpfile,
1214 .fileattr_get = xfs_fileattr_get,
1215 .fileattr_set = xfs_fileattr_set,
1216};
1217
1218static const struct inode_operations xfs_dir_ci_inode_operations = {
1219 .create = xfs_vn_create,
1220 .lookup = xfs_vn_ci_lookup,
1221 .link = xfs_vn_link,
1222 .unlink = xfs_vn_unlink,
1223 .symlink = xfs_vn_symlink,
1224 .mkdir = xfs_vn_mkdir,
1225
1226
1227
1228
1229
1230
1231 .rmdir = xfs_vn_unlink,
1232 .mknod = xfs_vn_mknod,
1233 .rename = xfs_vn_rename,
1234 .get_acl = xfs_get_acl,
1235 .set_acl = xfs_set_acl,
1236 .getattr = xfs_vn_getattr,
1237 .setattr = xfs_vn_setattr,
1238 .listxattr = xfs_vn_listxattr,
1239 .update_time = xfs_vn_update_time,
1240 .tmpfile = xfs_vn_tmpfile,
1241 .fileattr_get = xfs_fileattr_get,
1242 .fileattr_set = xfs_fileattr_set,
1243};
1244
1245static const struct inode_operations xfs_symlink_inode_operations = {
1246 .get_link = xfs_vn_get_link,
1247 .getattr = xfs_vn_getattr,
1248 .setattr = xfs_vn_setattr,
1249 .listxattr = xfs_vn_listxattr,
1250 .update_time = xfs_vn_update_time,
1251};
1252
1253static const struct inode_operations xfs_inline_symlink_inode_operations = {
1254 .get_link = xfs_vn_get_link_inline,
1255 .getattr = xfs_vn_getattr,
1256 .setattr = xfs_vn_setattr,
1257 .listxattr = xfs_vn_listxattr,
1258 .update_time = xfs_vn_update_time,
1259};
1260
1261
1262static bool
1263xfs_inode_supports_dax(
1264 struct xfs_inode *ip)
1265{
1266 struct xfs_mount *mp = ip->i_mount;
1267
1268
1269 if (!S_ISREG(VFS_I(ip)->i_mode))
1270 return false;
1271
1272
1273 if (xfs_is_reflink_inode(ip))
1274 return false;
1275
1276
1277 if (mp->m_sb.sb_blocksize != PAGE_SIZE)
1278 return false;
1279
1280
1281 return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
1282}
1283
1284static bool
1285xfs_inode_should_enable_dax(
1286 struct xfs_inode *ip)
1287{
1288 if (!IS_ENABLED(CONFIG_FS_DAX))
1289 return false;
1290 if (xfs_has_dax_never(ip->i_mount))
1291 return false;
1292 if (!xfs_inode_supports_dax(ip))
1293 return false;
1294 if (xfs_has_dax_always(ip->i_mount))
1295 return true;
1296 if (ip->i_diflags2 & XFS_DIFLAG2_DAX)
1297 return true;
1298 return false;
1299}
1300
1301void
1302xfs_diflags_to_iflags(
1303 struct xfs_inode *ip,
1304 bool init)
1305{
1306 struct inode *inode = VFS_I(ip);
1307 unsigned int xflags = xfs_ip2xflags(ip);
1308 unsigned int flags = 0;
1309
1310 ASSERT(!(IS_DAX(inode) && init));
1311
1312 if (xflags & FS_XFLAG_IMMUTABLE)
1313 flags |= S_IMMUTABLE;
1314 if (xflags & FS_XFLAG_APPEND)
1315 flags |= S_APPEND;
1316 if (xflags & FS_XFLAG_SYNC)
1317 flags |= S_SYNC;
1318 if (xflags & FS_XFLAG_NOATIME)
1319 flags |= S_NOATIME;
1320 if (init && xfs_inode_should_enable_dax(ip))
1321 flags |= S_DAX;
1322
1323
1324
1325
1326
1327 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | S_NOATIME);
1328 inode->i_flags |= flags;
1329}
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339void
1340xfs_setup_inode(
1341 struct xfs_inode *ip)
1342{
1343 struct inode *inode = &ip->i_vnode;
1344 gfp_t gfp_mask;
1345
1346 inode->i_ino = ip->i_ino;
1347 inode->i_state |= I_NEW;
1348
1349 inode_sb_list_add(inode);
1350
1351 inode_fake_hash(inode);
1352
1353 i_size_write(inode, ip->i_disk_size);
1354 xfs_diflags_to_iflags(ip, true);
1355
1356 if (S_ISDIR(inode->i_mode)) {
1357
1358
1359
1360
1361
1362
1363 lockdep_set_class(&inode->i_rwsem,
1364 &inode->i_sb->s_type->i_mutex_dir_key);
1365 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
1366 } else {
1367 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
1368 }
1369
1370
1371
1372
1373
1374
1375 gfp_mask = mapping_gfp_mask(inode->i_mapping);
1376 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
1377
1378
1379
1380
1381
1382 if (!XFS_IFORK_Q(ip)) {
1383 inode_has_no_xattr(inode);
1384 cache_no_acl(inode);
1385 }
1386}
1387
1388void
1389xfs_setup_iops(
1390 struct xfs_inode *ip)
1391{
1392 struct inode *inode = &ip->i_vnode;
1393
1394 switch (inode->i_mode & S_IFMT) {
1395 case S_IFREG:
1396 inode->i_op = &xfs_inode_operations;
1397 inode->i_fop = &xfs_file_operations;
1398 if (IS_DAX(inode))
1399 inode->i_mapping->a_ops = &xfs_dax_aops;
1400 else
1401 inode->i_mapping->a_ops = &xfs_address_space_operations;
1402 break;
1403 case S_IFDIR:
1404 if (xfs_has_asciici(XFS_M(inode->i_sb)))
1405 inode->i_op = &xfs_dir_ci_inode_operations;
1406 else
1407 inode->i_op = &xfs_dir_inode_operations;
1408 inode->i_fop = &xfs_dir_file_operations;
1409 break;
1410 case S_IFLNK:
1411 if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL)
1412 inode->i_op = &xfs_inline_symlink_inode_operations;
1413 else
1414 inode->i_op = &xfs_symlink_inode_operations;
1415 break;
1416 default:
1417 inode->i_op = &xfs_inode_operations;
1418 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1419 break;
1420 }
1421}
1422