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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
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_rtalloc.h"
15#include "xfs_iwalk.h"
16#include "xfs_itable.h"
17#include "xfs_error.h"
18#include "xfs_da_format.h"
19#include "xfs_da_btree.h"
20#include "xfs_attr.h"
21#include "xfs_bmap.h"
22#include "xfs_bmap_util.h"
23#include "xfs_fsops.h"
24#include "xfs_discard.h"
25#include "xfs_quota.h"
26#include "xfs_trace.h"
27#include "xfs_icache.h"
28#include "xfs_trans.h"
29#include "xfs_btree.h"
30#include <linux/fsmap.h>
31#include "xfs_fsmap.h"
32#include "scrub/xfs_scrub.h"
33#include "xfs_sb.h"
34#include "xfs_ag.h"
35#include "xfs_health.h"
36#include "xfs_reflink.h"
37#include "xfs_ioctl.h"
38#include "xfs_xattr.h"
39#include "xfs_rtbitmap.h"
40#include "xfs_file.h"
41#include "xfs_exchrange.h"
42#include "xfs_handle.h"
43#include "xfs_rtgroup.h"
44
45#include <linux/mount.h>
46#include <linux/fileattr.h>
47
48/* Return 0 on success or positive error */
49int
50xfs_fsbulkstat_one_fmt(
51 struct xfs_ibulk *breq,
52 const struct xfs_bulkstat *bstat)
53{
54 struct xfs_bstat bs1;
55
56 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
57 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
58 return -EFAULT;
59 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
60}
61
62int
63xfs_fsinumbers_fmt(
64 struct xfs_ibulk *breq,
65 const struct xfs_inumbers *igrp)
66{
67 struct xfs_inogrp ig1;
68
69 xfs_inumbers_to_inogrp(&ig1, igrp);
70 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
71 return -EFAULT;
72 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
73}
74
75STATIC int
76xfs_ioc_fsbulkstat(
77 struct file *file,
78 unsigned int cmd,
79 void __user *arg)
80{
81 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
82 struct xfs_fsop_bulkreq bulkreq;
83 struct xfs_ibulk breq = {
84 .mp = mp,
85 .idmap = file_mnt_idmap(file),
86 .ocount = 0,
87 };
88 xfs_ino_t lastino;
89 int error;
90
91 /* done = 1 if there are more stats to get and if bulkstat */
92 /* should be called again (unused here, but used in dmapi) */
93
94 if (!capable(CAP_SYS_ADMIN))
95 return -EPERM;
96
97 if (xfs_is_shutdown(mp))
98 return -EIO;
99
100 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
101 return -EFAULT;
102
103 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
104 return -EFAULT;
105
106 if (bulkreq.icount <= 0)
107 return -EINVAL;
108
109 if (bulkreq.ubuffer == NULL)
110 return -EINVAL;
111
112 breq.ubuffer = bulkreq.ubuffer;
113 breq.icount = bulkreq.icount;
114
115 /*
116 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
117 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
118 * that *lastip contains either zero or the number of the last inode to
119 * be examined by the previous call and return results starting with
120 * the next inode after that. The new bulk request back end functions
121 * take the inode to start with, so we have to compute the startino
122 * parameter from lastino to maintain correct function. lastino == 0
123 * is a special case because it has traditionally meant "first inode
124 * in filesystem".
125 */
126 if (cmd == XFS_IOC_FSINUMBERS) {
127 breq.startino = lastino ? lastino + 1 : 0;
128 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
129 lastino = breq.startino - 1;
130 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
131 breq.startino = lastino;
132 breq.icount = 1;
133 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
134 } else { /* XFS_IOC_FSBULKSTAT */
135 breq.startino = lastino ? lastino + 1 : 0;
136 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
137 lastino = breq.startino - 1;
138 }
139
140 if (error)
141 return error;
142
143 if (bulkreq.lastip != NULL &&
144 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
145 return -EFAULT;
146
147 if (bulkreq.ocount != NULL &&
148 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
149 return -EFAULT;
150
151 return 0;
152}
153
154/* Return 0 on success or positive error */
155static int
156xfs_bulkstat_fmt(
157 struct xfs_ibulk *breq,
158 const struct xfs_bulkstat *bstat)
159{
160 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
161 return -EFAULT;
162 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
163}
164
165/*
166 * Check the incoming bulk request @hdr from userspace and initialize the
167 * internal @breq bulk request appropriately. Returns 0 if the bulk request
168 * should proceed; -ECANCELED if there's nothing to do; or the usual
169 * negative error code.
170 */
171static int
172xfs_bulk_ireq_setup(
173 struct xfs_mount *mp,
174 const struct xfs_bulk_ireq *hdr,
175 struct xfs_ibulk *breq,
176 void __user *ubuffer)
177{
178 if (hdr->icount == 0 ||
179 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
180 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
181 return -EINVAL;
182
183 breq->startino = hdr->ino;
184 breq->ubuffer = ubuffer;
185 breq->icount = hdr->icount;
186 breq->ocount = 0;
187 breq->flags = 0;
188
189 /*
190 * The @ino parameter is a special value, so we must look it up here.
191 * We're not allowed to have IREQ_AGNO, and we only return one inode
192 * worth of data.
193 */
194 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
195 if (hdr->flags & XFS_BULK_IREQ_AGNO)
196 return -EINVAL;
197
198 switch (hdr->ino) {
199 case XFS_BULK_IREQ_SPECIAL_ROOT:
200 breq->startino = mp->m_sb.sb_rootino;
201 break;
202 default:
203 return -EINVAL;
204 }
205 breq->icount = 1;
206 }
207
208 /*
209 * The IREQ_AGNO flag means that we only want results from a given AG.
210 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
211 * beyond the specified AG then we return no results.
212 */
213 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
214 if (hdr->agno >= mp->m_sb.sb_agcount)
215 return -EINVAL;
216
217 if (breq->startino == 0)
218 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
219 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
220 return -EINVAL;
221
222 breq->flags |= XFS_IBULK_SAME_AG;
223
224 /* Asking for an inode past the end of the AG? We're done! */
225 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
226 return -ECANCELED;
227 } else if (hdr->agno)
228 return -EINVAL;
229
230 /* Asking for an inode past the end of the FS? We're done! */
231 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
232 return -ECANCELED;
233
234 if (hdr->flags & XFS_BULK_IREQ_NREXT64)
235 breq->flags |= XFS_IBULK_NREXT64;
236
237 /* Caller wants to see metadata directories in bulkstat output. */
238 if (hdr->flags & XFS_BULK_IREQ_METADIR)
239 breq->flags |= XFS_IBULK_METADIR;
240
241 return 0;
242}
243
244/*
245 * Update the userspace bulk request @hdr to reflect the end state of the
246 * internal bulk request @breq.
247 */
248static void
249xfs_bulk_ireq_teardown(
250 struct xfs_bulk_ireq *hdr,
251 struct xfs_ibulk *breq)
252{
253 hdr->ino = breq->startino;
254 hdr->ocount = breq->ocount;
255}
256
257/* Handle the v5 bulkstat ioctl. */
258STATIC int
259xfs_ioc_bulkstat(
260 struct file *file,
261 unsigned int cmd,
262 struct xfs_bulkstat_req __user *arg)
263{
264 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
265 struct xfs_bulk_ireq hdr;
266 struct xfs_ibulk breq = {
267 .mp = mp,
268 .idmap = file_mnt_idmap(file),
269 };
270 int error;
271
272 if (!capable(CAP_SYS_ADMIN))
273 return -EPERM;
274
275 if (xfs_is_shutdown(mp))
276 return -EIO;
277
278 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
279 return -EFAULT;
280
281 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
282 if (error == -ECANCELED)
283 goto out_teardown;
284 if (error < 0)
285 return error;
286
287 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
288 if (error)
289 return error;
290
291out_teardown:
292 xfs_bulk_ireq_teardown(&hdr, &breq);
293 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
294 return -EFAULT;
295
296 return 0;
297}
298
299STATIC int
300xfs_inumbers_fmt(
301 struct xfs_ibulk *breq,
302 const struct xfs_inumbers *igrp)
303{
304 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
305 return -EFAULT;
306 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
307}
308
309/* Handle the v5 inumbers ioctl. */
310STATIC int
311xfs_ioc_inumbers(
312 struct xfs_mount *mp,
313 unsigned int cmd,
314 struct xfs_inumbers_req __user *arg)
315{
316 struct xfs_bulk_ireq hdr;
317 struct xfs_ibulk breq = {
318 .mp = mp,
319 };
320 int error;
321
322 if (!capable(CAP_SYS_ADMIN))
323 return -EPERM;
324
325 if (xfs_is_shutdown(mp))
326 return -EIO;
327
328 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
329 return -EFAULT;
330
331 if (hdr.flags & XFS_BULK_IREQ_METADIR)
332 return -EINVAL;
333
334 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
335 if (error == -ECANCELED)
336 goto out_teardown;
337 if (error < 0)
338 return error;
339
340 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
341 if (error)
342 return error;
343
344out_teardown:
345 xfs_bulk_ireq_teardown(&hdr, &breq);
346 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
347 return -EFAULT;
348
349 return 0;
350}
351
352STATIC int
353xfs_ioc_fsgeometry(
354 struct xfs_mount *mp,
355 void __user *arg,
356 int struct_version)
357{
358 struct xfs_fsop_geom fsgeo;
359 size_t len;
360
361 xfs_fs_geometry(mp, &fsgeo, struct_version);
362
363 if (struct_version <= 3)
364 len = sizeof(struct xfs_fsop_geom_v1);
365 else if (struct_version == 4)
366 len = sizeof(struct xfs_fsop_geom_v4);
367 else {
368 xfs_fsop_geom_health(mp, &fsgeo);
369 len = sizeof(fsgeo);
370 }
371
372 if (copy_to_user(arg, &fsgeo, len))
373 return -EFAULT;
374 return 0;
375}
376
377STATIC int
378xfs_ioc_ag_geometry(
379 struct xfs_mount *mp,
380 void __user *arg)
381{
382 struct xfs_perag *pag;
383 struct xfs_ag_geometry ageo;
384 int error;
385
386 if (copy_from_user(&ageo, arg, sizeof(ageo)))
387 return -EFAULT;
388 if (ageo.ag_flags)
389 return -EINVAL;
390 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
391 return -EINVAL;
392
393 pag = xfs_perag_get(mp, ageo.ag_number);
394 if (!pag)
395 return -EINVAL;
396
397 error = xfs_ag_get_geometry(pag, &ageo);
398 xfs_perag_put(pag);
399 if (error)
400 return error;
401
402 if (copy_to_user(arg, &ageo, sizeof(ageo)))
403 return -EFAULT;
404 return 0;
405}
406
407STATIC int
408xfs_ioc_rtgroup_geometry(
409 struct xfs_mount *mp,
410 void __user *arg)
411{
412 struct xfs_rtgroup *rtg;
413 struct xfs_rtgroup_geometry rgeo;
414 int error;
415
416 if (copy_from_user(&rgeo, arg, sizeof(rgeo)))
417 return -EFAULT;
418 if (rgeo.rg_flags)
419 return -EINVAL;
420 if (memchr_inv(&rgeo.rg_reserved, 0, sizeof(rgeo.rg_reserved)))
421 return -EINVAL;
422 if (!xfs_has_rtgroups(mp))
423 return -EINVAL;
424
425 rtg = xfs_rtgroup_get(mp, rgeo.rg_number);
426 if (!rtg)
427 return -EINVAL;
428
429 error = xfs_rtgroup_get_geometry(rtg, &rgeo);
430 xfs_rtgroup_put(rtg);
431 if (error)
432 return error;
433
434 if (copy_to_user(arg, &rgeo, sizeof(rgeo)))
435 return -EFAULT;
436 return 0;
437}
438
439/*
440 * Linux extended inode flags interface.
441 */
442
443static void
444xfs_fill_fsxattr(
445 struct xfs_inode *ip,
446 int whichfork,
447 struct fileattr *fa)
448{
449 struct xfs_mount *mp = ip->i_mount;
450 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
451
452 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
453
454 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
455 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
456 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
457 /*
458 * Don't let a misaligned extent size hint on a directory
459 * escape to userspace if it won't pass the setattr checks
460 * later.
461 */
462 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
463 xfs_extlen_to_rtxmod(mp, ip->i_extsize) > 0) {
464 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
465 FS_XFLAG_EXTSZINHERIT);
466 fa->fsx_extsize = 0;
467 } else {
468 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
469 }
470 }
471
472 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
473 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
474 fa->fsx_projid = ip->i_projid;
475 if (ifp && !xfs_need_iread_extents(ifp))
476 fa->fsx_nextents = xfs_iext_count(ifp);
477 else
478 fa->fsx_nextents = xfs_ifork_nextents(ifp);
479}
480
481STATIC int
482xfs_ioc_fsgetxattra(
483 xfs_inode_t *ip,
484 void __user *arg)
485{
486 struct fileattr fa;
487
488 xfs_ilock(ip, XFS_ILOCK_SHARED);
489 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
490 xfs_iunlock(ip, XFS_ILOCK_SHARED);
491
492 return copy_fsxattr_to_user(&fa, arg);
493}
494
495int
496xfs_fileattr_get(
497 struct dentry *dentry,
498 struct fileattr *fa)
499{
500 struct xfs_inode *ip = XFS_I(d_inode(dentry));
501
502 if (d_is_special(dentry))
503 return -ENOTTY;
504
505 xfs_ilock(ip, XFS_ILOCK_SHARED);
506 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
507 xfs_iunlock(ip, XFS_ILOCK_SHARED);
508
509 return 0;
510}
511
512static int
513xfs_ioctl_setattr_xflags(
514 struct xfs_trans *tp,
515 struct xfs_inode *ip,
516 struct fileattr *fa)
517{
518 struct xfs_mount *mp = ip->i_mount;
519 bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME);
520 uint64_t i_flags2;
521
522 if (rtflag != XFS_IS_REALTIME_INODE(ip)) {
523 /* Can't change realtime flag if any extents are allocated. */
524 if (xfs_inode_has_filedata(ip))
525 return -EINVAL;
526
527 /*
528 * If S_DAX is enabled on this file, we can only switch the
529 * device if both support fsdax. We can't update S_DAX because
530 * there might be other threads walking down the access paths.
531 */
532 if (IS_DAX(VFS_I(ip)) &&
533 (mp->m_ddev_targp->bt_daxdev == NULL ||
534 (mp->m_rtdev_targp &&
535 mp->m_rtdev_targp->bt_daxdev == NULL)))
536 return -EINVAL;
537 }
538
539 if (rtflag) {
540 /* If realtime flag is set then must have realtime device */
541 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
542 xfs_extlen_to_rtxmod(mp, ip->i_extsize))
543 return -EINVAL;
544
545 /* Clear reflink if we are actually able to set the rt flag. */
546 if (xfs_is_reflink_inode(ip))
547 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
548 }
549
550 /* diflags2 only valid for v3 inodes. */
551 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
552 if (i_flags2 && !xfs_has_v3inodes(mp))
553 return -EINVAL;
554
555 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
556 ip->i_diflags2 = i_flags2;
557
558 xfs_diflags_to_iflags(ip, false);
559
560 /*
561 * Make the stable writes flag match that of the device the inode
562 * resides on when flipping the RT flag.
563 */
564 if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode))
565 xfs_update_stable_writes(ip);
566
567 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
568 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
569 XFS_STATS_INC(mp, xs_ig_attrchg);
570 return 0;
571}
572
573static void
574xfs_ioctl_setattr_prepare_dax(
575 struct xfs_inode *ip,
576 struct fileattr *fa)
577{
578 struct xfs_mount *mp = ip->i_mount;
579 struct inode *inode = VFS_I(ip);
580
581 if (S_ISDIR(inode->i_mode))
582 return;
583
584 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
585 return;
586
587 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
588 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
589 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
590 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
591 d_mark_dontcache(inode);
592}
593
594/*
595 * Set up the transaction structure for the setattr operation, checking that we
596 * have permission to do so. On success, return a clean transaction and the
597 * inode locked exclusively ready for further operation specific checks. On
598 * failure, return an error without modifying or locking the inode.
599 */
600static struct xfs_trans *
601xfs_ioctl_setattr_get_trans(
602 struct xfs_inode *ip,
603 struct xfs_dquot *pdqp)
604{
605 struct xfs_mount *mp = ip->i_mount;
606 struct xfs_trans *tp;
607 int error = -EROFS;
608
609 if (xfs_is_readonly(mp))
610 goto out_error;
611 error = -EIO;
612 if (xfs_is_shutdown(mp))
613 goto out_error;
614
615 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
616 has_capability_noaudit(current, CAP_FOWNER), &tp);
617 if (error)
618 goto out_error;
619
620 if (xfs_has_wsync(mp))
621 xfs_trans_set_sync(tp);
622
623 return tp;
624
625out_error:
626 return ERR_PTR(error);
627}
628
629/*
630 * Validate a proposed extent size hint. For regular files, the hint can only
631 * be changed if no extents are allocated.
632 */
633static int
634xfs_ioctl_setattr_check_extsize(
635 struct xfs_inode *ip,
636 struct fileattr *fa)
637{
638 struct xfs_mount *mp = ip->i_mount;
639 xfs_failaddr_t failaddr;
640 uint16_t new_diflags;
641
642 if (!fa->fsx_valid)
643 return 0;
644
645 if (S_ISREG(VFS_I(ip)->i_mode) && xfs_inode_has_filedata(ip) &&
646 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
647 return -EINVAL;
648
649 if (fa->fsx_extsize & mp->m_blockmask)
650 return -EINVAL;
651
652 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
653
654 /*
655 * Inode verifiers do not check that the extent size hint is an integer
656 * multiple of the rt extent size on a directory with both rtinherit
657 * and extszinherit flags set. Don't let sysadmins misconfigure
658 * directories.
659 */
660 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
661 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
662 unsigned int rtextsize_bytes;
663
664 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
665 if (fa->fsx_extsize % rtextsize_bytes)
666 return -EINVAL;
667 }
668
669 failaddr = xfs_inode_validate_extsize(ip->i_mount,
670 XFS_B_TO_FSB(mp, fa->fsx_extsize),
671 VFS_I(ip)->i_mode, new_diflags);
672 return failaddr != NULL ? -EINVAL : 0;
673}
674
675static int
676xfs_ioctl_setattr_check_cowextsize(
677 struct xfs_inode *ip,
678 struct fileattr *fa)
679{
680 struct xfs_mount *mp = ip->i_mount;
681 xfs_failaddr_t failaddr;
682 uint64_t new_diflags2;
683 uint16_t new_diflags;
684
685 if (!fa->fsx_valid)
686 return 0;
687
688 if (fa->fsx_cowextsize & mp->m_blockmask)
689 return -EINVAL;
690
691 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
692 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
693
694 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
695 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
696 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
697 return failaddr != NULL ? -EINVAL : 0;
698}
699
700static int
701xfs_ioctl_setattr_check_projid(
702 struct xfs_inode *ip,
703 struct fileattr *fa)
704{
705 if (!fa->fsx_valid)
706 return 0;
707
708 /* Disallow 32bit project ids if 32bit IDs are not enabled. */
709 if (fa->fsx_projid > (uint16_t)-1 &&
710 !xfs_has_projid32(ip->i_mount))
711 return -EINVAL;
712 return 0;
713}
714
715int
716xfs_fileattr_set(
717 struct mnt_idmap *idmap,
718 struct dentry *dentry,
719 struct fileattr *fa)
720{
721 struct xfs_inode *ip = XFS_I(d_inode(dentry));
722 struct xfs_mount *mp = ip->i_mount;
723 struct xfs_trans *tp;
724 struct xfs_dquot *pdqp = NULL;
725 struct xfs_dquot *olddquot = NULL;
726 int error;
727
728 trace_xfs_ioctl_setattr(ip);
729
730 if (d_is_special(dentry))
731 return -ENOTTY;
732
733 if (!fa->fsx_valid) {
734 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
735 FS_NOATIME_FL | FS_NODUMP_FL |
736 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
737 return -EOPNOTSUPP;
738 }
739
740 error = xfs_ioctl_setattr_check_projid(ip, fa);
741 if (error)
742 return error;
743
744 /*
745 * If disk quotas is on, we make sure that the dquots do exist on disk,
746 * before we start any other transactions. Trying to do this later
747 * is messy. We don't care to take a readlock to look at the ids
748 * in inode here, because we can't hold it across the trans_reserve.
749 * If the IDs do change before we take the ilock, we're covered
750 * because the i_*dquot fields will get updated anyway.
751 */
752 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
753 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
754 VFS_I(ip)->i_gid, fa->fsx_projid,
755 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
756 if (error)
757 return error;
758 }
759
760 xfs_ioctl_setattr_prepare_dax(ip, fa);
761
762 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
763 if (IS_ERR(tp)) {
764 error = PTR_ERR(tp);
765 goto error_free_dquots;
766 }
767
768 error = xfs_ioctl_setattr_check_extsize(ip, fa);
769 if (error)
770 goto error_trans_cancel;
771
772 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
773 if (error)
774 goto error_trans_cancel;
775
776 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
777 if (error)
778 goto error_trans_cancel;
779
780 if (!fa->fsx_valid)
781 goto skip_xattr;
782 /*
783 * Change file ownership. Must be the owner or privileged. CAP_FSETID
784 * overrides the following restrictions:
785 *
786 * The set-user-ID and set-group-ID bits of a file will be cleared upon
787 * successful return from chown()
788 */
789
790 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
791 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID))
792 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
793
794 /* Change the ownerships and register project quota modifications */
795 if (ip->i_projid != fa->fsx_projid) {
796 if (XFS_IS_PQUOTA_ON(mp)) {
797 olddquot = xfs_qm_vop_chown(tp, ip,
798 &ip->i_pdquot, pdqp);
799 }
800 ip->i_projid = fa->fsx_projid;
801 }
802
803 /*
804 * Only set the extent size hint if we've already determined that the
805 * extent size hint should be set on the inode. If no extent size flags
806 * are set on the inode then unconditionally clear the extent size hint.
807 */
808 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
809 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
810 else
811 ip->i_extsize = 0;
812
813 if (xfs_has_v3inodes(mp)) {
814 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
815 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
816 else
817 ip->i_cowextsize = 0;
818 }
819
820skip_xattr:
821 error = xfs_trans_commit(tp);
822
823 /*
824 * Release any dquot(s) the inode had kept before chown.
825 */
826 xfs_qm_dqrele(olddquot);
827 xfs_qm_dqrele(pdqp);
828
829 return error;
830
831error_trans_cancel:
832 xfs_trans_cancel(tp);
833error_free_dquots:
834 xfs_qm_dqrele(pdqp);
835 return error;
836}
837
838static bool
839xfs_getbmap_format(
840 struct kgetbmap *p,
841 struct getbmapx __user *u,
842 size_t recsize)
843{
844 if (put_user(p->bmv_offset, &u->bmv_offset) ||
845 put_user(p->bmv_block, &u->bmv_block) ||
846 put_user(p->bmv_length, &u->bmv_length) ||
847 put_user(0, &u->bmv_count) ||
848 put_user(0, &u->bmv_entries))
849 return false;
850 if (recsize < sizeof(struct getbmapx))
851 return true;
852 if (put_user(0, &u->bmv_iflags) ||
853 put_user(p->bmv_oflags, &u->bmv_oflags) ||
854 put_user(0, &u->bmv_unused1) ||
855 put_user(0, &u->bmv_unused2))
856 return false;
857 return true;
858}
859
860STATIC int
861xfs_ioc_getbmap(
862 struct file *file,
863 unsigned int cmd,
864 void __user *arg)
865{
866 struct getbmapx bmx = { 0 };
867 struct kgetbmap *buf;
868 size_t recsize;
869 int error, i;
870
871 switch (cmd) {
872 case XFS_IOC_GETBMAPA:
873 bmx.bmv_iflags = BMV_IF_ATTRFORK;
874 fallthrough;
875 case XFS_IOC_GETBMAP:
876 /* struct getbmap is a strict subset of struct getbmapx. */
877 recsize = sizeof(struct getbmap);
878 break;
879 case XFS_IOC_GETBMAPX:
880 recsize = sizeof(struct getbmapx);
881 break;
882 default:
883 return -EINVAL;
884 }
885
886 if (copy_from_user(&bmx, arg, recsize))
887 return -EFAULT;
888
889 if (bmx.bmv_count < 2)
890 return -EINVAL;
891 if (bmx.bmv_count >= INT_MAX / recsize)
892 return -ENOMEM;
893
894 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
895 if (!buf)
896 return -ENOMEM;
897
898 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
899 if (error)
900 goto out_free_buf;
901
902 error = -EFAULT;
903 if (copy_to_user(arg, &bmx, recsize))
904 goto out_free_buf;
905 arg += recsize;
906
907 for (i = 0; i < bmx.bmv_entries; i++) {
908 if (!xfs_getbmap_format(buf + i, arg, recsize))
909 goto out_free_buf;
910 arg += recsize;
911 }
912
913 error = 0;
914out_free_buf:
915 kvfree(buf);
916 return error;
917}
918
919int
920xfs_ioc_swapext(
921 xfs_swapext_t *sxp)
922{
923 xfs_inode_t *ip, *tip;
924
925 /* Pull information for the target fd */
926 CLASS(fd, f)((int)sxp->sx_fdtarget);
927 if (fd_empty(f))
928 return -EINVAL;
929
930 if (!(fd_file(f)->f_mode & FMODE_WRITE) ||
931 !(fd_file(f)->f_mode & FMODE_READ) ||
932 (fd_file(f)->f_flags & O_APPEND))
933 return -EBADF;
934
935 CLASS(fd, tmp)((int)sxp->sx_fdtmp);
936 if (fd_empty(tmp))
937 return -EINVAL;
938
939 if (!(fd_file(tmp)->f_mode & FMODE_WRITE) ||
940 !(fd_file(tmp)->f_mode & FMODE_READ) ||
941 (fd_file(tmp)->f_flags & O_APPEND))
942 return -EBADF;
943
944 if (IS_SWAPFILE(file_inode(fd_file(f))) ||
945 IS_SWAPFILE(file_inode(fd_file(tmp))))
946 return -EINVAL;
947
948 /*
949 * We need to ensure that the fds passed in point to XFS inodes
950 * before we cast and access them as XFS structures as we have no
951 * control over what the user passes us here.
952 */
953 if (fd_file(f)->f_op != &xfs_file_operations ||
954 fd_file(tmp)->f_op != &xfs_file_operations)
955 return -EINVAL;
956
957 ip = XFS_I(file_inode(fd_file(f)));
958 tip = XFS_I(file_inode(fd_file(tmp)));
959
960 if (ip->i_mount != tip->i_mount)
961 return -EINVAL;
962
963 if (ip->i_ino == tip->i_ino)
964 return -EINVAL;
965
966 if (xfs_is_shutdown(ip->i_mount))
967 return -EIO;
968
969 return xfs_swap_extents(ip, tip, sxp);
970}
971
972static int
973xfs_ioc_getlabel(
974 struct xfs_mount *mp,
975 char __user *user_label)
976{
977 struct xfs_sb *sbp = &mp->m_sb;
978 char label[XFSLABEL_MAX + 1];
979
980 /* Paranoia */
981 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
982
983 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
984 memset(label, 0, sizeof(label));
985 spin_lock(&mp->m_sb_lock);
986 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
987 spin_unlock(&mp->m_sb_lock);
988
989 if (copy_to_user(user_label, label, sizeof(label)))
990 return -EFAULT;
991 return 0;
992}
993
994static int
995xfs_ioc_setlabel(
996 struct file *filp,
997 struct xfs_mount *mp,
998 char __user *newlabel)
999{
1000 struct xfs_sb *sbp = &mp->m_sb;
1001 char label[XFSLABEL_MAX + 1];
1002 size_t len;
1003 int error;
1004
1005 if (!capable(CAP_SYS_ADMIN))
1006 return -EPERM;
1007 /*
1008 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1009 * smaller, at 12 bytes. We copy one more to be sure we find the
1010 * (required) NULL character to test the incoming label length.
1011 * NB: The on disk label doesn't need to be null terminated.
1012 */
1013 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1014 return -EFAULT;
1015 len = strnlen(label, XFSLABEL_MAX + 1);
1016 if (len > sizeof(sbp->sb_fname))
1017 return -EINVAL;
1018
1019 error = mnt_want_write_file(filp);
1020 if (error)
1021 return error;
1022
1023 spin_lock(&mp->m_sb_lock);
1024 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1025 memcpy(sbp->sb_fname, label, len);
1026 spin_unlock(&mp->m_sb_lock);
1027
1028 /*
1029 * Now we do several things to satisfy userspace.
1030 * In addition to normal logging of the primary superblock, we also
1031 * immediately write these changes to sector zero for the primary, then
1032 * update all backup supers (as xfs_db does for a label change), then
1033 * invalidate the block device page cache. This is so that any prior
1034 * buffered reads from userspace (i.e. from blkid) are invalidated,
1035 * and userspace will see the newly-written label.
1036 */
1037 error = xfs_sync_sb_buf(mp, true);
1038 if (error)
1039 goto out;
1040 /*
1041 * growfs also updates backup supers so lock against that.
1042 */
1043 mutex_lock(&mp->m_growlock);
1044 error = xfs_update_secondary_sbs(mp);
1045 mutex_unlock(&mp->m_growlock);
1046
1047 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1048 if (xfs_has_rtsb(mp) && mp->m_rtdev_targp)
1049 invalidate_bdev(mp->m_rtdev_targp->bt_bdev);
1050
1051out:
1052 mnt_drop_write_file(filp);
1053 return error;
1054}
1055
1056static inline int
1057xfs_fs_eofblocks_from_user(
1058 struct xfs_fs_eofblocks *src,
1059 struct xfs_icwalk *dst)
1060{
1061 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1062 return -EINVAL;
1063
1064 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1065 return -EINVAL;
1066
1067 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1068 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1069 return -EINVAL;
1070
1071 dst->icw_flags = 0;
1072 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1073 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1074 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1075 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1076 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1077 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1078 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1079 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1080 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1081 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1082
1083 dst->icw_prid = src->eof_prid;
1084 dst->icw_min_file_size = src->eof_min_file_size;
1085
1086 dst->icw_uid = INVALID_UID;
1087 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1088 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1089 if (!uid_valid(dst->icw_uid))
1090 return -EINVAL;
1091 }
1092
1093 dst->icw_gid = INVALID_GID;
1094 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1095 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1096 if (!gid_valid(dst->icw_gid))
1097 return -EINVAL;
1098 }
1099 return 0;
1100}
1101
1102static int
1103xfs_ioctl_getset_resblocks(
1104 struct file *filp,
1105 unsigned int cmd,
1106 void __user *arg)
1107{
1108 struct xfs_mount *mp = XFS_I(file_inode(filp))->i_mount;
1109 struct xfs_fsop_resblks fsop = { };
1110 int error;
1111
1112 if (!capable(CAP_SYS_ADMIN))
1113 return -EPERM;
1114
1115 if (cmd == XFS_IOC_SET_RESBLKS) {
1116 if (xfs_is_readonly(mp))
1117 return -EROFS;
1118
1119 if (copy_from_user(&fsop, arg, sizeof(fsop)))
1120 return -EFAULT;
1121
1122 error = mnt_want_write_file(filp);
1123 if (error)
1124 return error;
1125 error = xfs_reserve_blocks(mp, fsop.resblks);
1126 mnt_drop_write_file(filp);
1127 if (error)
1128 return error;
1129 }
1130
1131 spin_lock(&mp->m_sb_lock);
1132 fsop.resblks = mp->m_resblks;
1133 fsop.resblks_avail = mp->m_resblks_avail;
1134 spin_unlock(&mp->m_sb_lock);
1135
1136 if (copy_to_user(arg, &fsop, sizeof(fsop)))
1137 return -EFAULT;
1138 return 0;
1139}
1140
1141static int
1142xfs_ioctl_fs_counts(
1143 struct xfs_mount *mp,
1144 struct xfs_fsop_counts __user *uarg)
1145{
1146 struct xfs_fsop_counts out = {
1147 .allocino = percpu_counter_read_positive(&mp->m_icount),
1148 .freeino = percpu_counter_read_positive(&mp->m_ifree),
1149 .freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
1150 xfs_fdblocks_unavailable(mp),
1151 .freertx = percpu_counter_read_positive(&mp->m_frextents),
1152 };
1153
1154 if (copy_to_user(uarg, &out, sizeof(out)))
1155 return -EFAULT;
1156 return 0;
1157}
1158
1159/*
1160 * These long-unused ioctls were removed from the official ioctl API in 5.17,
1161 * but retain these definitions so that we can log warnings about them.
1162 */
1163#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
1164#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
1165#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
1166#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
1167
1168/*
1169 * Note: some of the ioctl's return positive numbers as a
1170 * byte count indicating success, such as readlink_by_handle.
1171 * So we don't "sign flip" like most other routines. This means
1172 * true errors need to be returned as a negative value.
1173 */
1174long
1175xfs_file_ioctl(
1176 struct file *filp,
1177 unsigned int cmd,
1178 unsigned long p)
1179{
1180 struct inode *inode = file_inode(filp);
1181 struct xfs_inode *ip = XFS_I(inode);
1182 struct xfs_mount *mp = ip->i_mount;
1183 void __user *arg = (void __user *)p;
1184 int error;
1185
1186 trace_xfs_file_ioctl(ip);
1187
1188 switch (cmd) {
1189 case FITRIM:
1190 return xfs_ioc_trim(mp, arg);
1191 case FS_IOC_GETFSLABEL:
1192 return xfs_ioc_getlabel(mp, arg);
1193 case FS_IOC_SETFSLABEL:
1194 return xfs_ioc_setlabel(filp, mp, arg);
1195 case XFS_IOC_ALLOCSP:
1196 case XFS_IOC_FREESP:
1197 case XFS_IOC_ALLOCSP64:
1198 case XFS_IOC_FREESP64:
1199 xfs_warn_once(mp,
1200 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
1201 current->comm);
1202 return -ENOTTY;
1203 case XFS_IOC_DIOINFO: {
1204 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1205 struct dioattr da;
1206
1207 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1208 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1209
1210 if (copy_to_user(arg, &da, sizeof(da)))
1211 return -EFAULT;
1212 return 0;
1213 }
1214
1215 case XFS_IOC_FSBULKSTAT_SINGLE:
1216 case XFS_IOC_FSBULKSTAT:
1217 case XFS_IOC_FSINUMBERS:
1218 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1219
1220 case XFS_IOC_BULKSTAT:
1221 return xfs_ioc_bulkstat(filp, cmd, arg);
1222 case XFS_IOC_INUMBERS:
1223 return xfs_ioc_inumbers(mp, cmd, arg);
1224
1225 case XFS_IOC_FSGEOMETRY_V1:
1226 return xfs_ioc_fsgeometry(mp, arg, 3);
1227 case XFS_IOC_FSGEOMETRY_V4:
1228 return xfs_ioc_fsgeometry(mp, arg, 4);
1229 case XFS_IOC_FSGEOMETRY:
1230 return xfs_ioc_fsgeometry(mp, arg, 5);
1231
1232 case XFS_IOC_AG_GEOMETRY:
1233 return xfs_ioc_ag_geometry(mp, arg);
1234 case XFS_IOC_RTGROUP_GEOMETRY:
1235 return xfs_ioc_rtgroup_geometry(mp, arg);
1236
1237 case XFS_IOC_GETVERSION:
1238 return put_user(inode->i_generation, (int __user *)arg);
1239
1240 case XFS_IOC_FSGETXATTRA:
1241 return xfs_ioc_fsgetxattra(ip, arg);
1242 case XFS_IOC_GETPARENTS:
1243 return xfs_ioc_getparents(filp, arg);
1244 case XFS_IOC_GETPARENTS_BY_HANDLE:
1245 return xfs_ioc_getparents_by_handle(filp, arg);
1246 case XFS_IOC_GETBMAP:
1247 case XFS_IOC_GETBMAPA:
1248 case XFS_IOC_GETBMAPX:
1249 return xfs_ioc_getbmap(filp, cmd, arg);
1250
1251 case FS_IOC_GETFSMAP:
1252 return xfs_ioc_getfsmap(ip, arg);
1253
1254 case XFS_IOC_SCRUBV_METADATA:
1255 return xfs_ioc_scrubv_metadata(filp, arg);
1256 case XFS_IOC_SCRUB_METADATA:
1257 return xfs_ioc_scrub_metadata(filp, arg);
1258
1259 case XFS_IOC_FD_TO_HANDLE:
1260 case XFS_IOC_PATH_TO_HANDLE:
1261 case XFS_IOC_PATH_TO_FSHANDLE: {
1262 xfs_fsop_handlereq_t hreq;
1263
1264 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1265 return -EFAULT;
1266 return xfs_find_handle(cmd, &hreq);
1267 }
1268 case XFS_IOC_OPEN_BY_HANDLE: {
1269 xfs_fsop_handlereq_t hreq;
1270
1271 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1272 return -EFAULT;
1273 return xfs_open_by_handle(filp, &hreq);
1274 }
1275
1276 case XFS_IOC_READLINK_BY_HANDLE: {
1277 xfs_fsop_handlereq_t hreq;
1278
1279 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1280 return -EFAULT;
1281 return xfs_readlink_by_handle(filp, &hreq);
1282 }
1283 case XFS_IOC_ATTRLIST_BY_HANDLE:
1284 return xfs_attrlist_by_handle(filp, arg);
1285
1286 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1287 return xfs_attrmulti_by_handle(filp, arg);
1288
1289 case XFS_IOC_SWAPEXT: {
1290 struct xfs_swapext sxp;
1291
1292 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1293 return -EFAULT;
1294 error = mnt_want_write_file(filp);
1295 if (error)
1296 return error;
1297 error = xfs_ioc_swapext(&sxp);
1298 mnt_drop_write_file(filp);
1299 return error;
1300 }
1301
1302 case XFS_IOC_FSCOUNTS:
1303 return xfs_ioctl_fs_counts(mp, arg);
1304
1305 case XFS_IOC_SET_RESBLKS:
1306 case XFS_IOC_GET_RESBLKS:
1307 return xfs_ioctl_getset_resblocks(filp, cmd, arg);
1308
1309 case XFS_IOC_FSGROWFSDATA: {
1310 struct xfs_growfs_data in;
1311
1312 if (copy_from_user(&in, arg, sizeof(in)))
1313 return -EFAULT;
1314
1315 error = mnt_want_write_file(filp);
1316 if (error)
1317 return error;
1318 error = xfs_growfs_data(mp, &in);
1319 mnt_drop_write_file(filp);
1320 return error;
1321 }
1322
1323 case XFS_IOC_FSGROWFSLOG: {
1324 struct xfs_growfs_log in;
1325
1326 if (copy_from_user(&in, arg, sizeof(in)))
1327 return -EFAULT;
1328
1329 error = mnt_want_write_file(filp);
1330 if (error)
1331 return error;
1332 error = xfs_growfs_log(mp, &in);
1333 mnt_drop_write_file(filp);
1334 return error;
1335 }
1336
1337 case XFS_IOC_FSGROWFSRT: {
1338 xfs_growfs_rt_t in;
1339
1340 if (copy_from_user(&in, arg, sizeof(in)))
1341 return -EFAULT;
1342
1343 error = mnt_want_write_file(filp);
1344 if (error)
1345 return error;
1346 error = xfs_growfs_rt(mp, &in);
1347 mnt_drop_write_file(filp);
1348 return error;
1349 }
1350
1351 case XFS_IOC_GOINGDOWN: {
1352 uint32_t in;
1353
1354 if (!capable(CAP_SYS_ADMIN))
1355 return -EPERM;
1356
1357 if (get_user(in, (uint32_t __user *)arg))
1358 return -EFAULT;
1359
1360 return xfs_fs_goingdown(mp, in);
1361 }
1362
1363 case XFS_IOC_ERROR_INJECTION: {
1364 xfs_error_injection_t in;
1365
1366 if (!capable(CAP_SYS_ADMIN))
1367 return -EPERM;
1368
1369 if (copy_from_user(&in, arg, sizeof(in)))
1370 return -EFAULT;
1371
1372 return xfs_errortag_add(mp, in.errtag);
1373 }
1374
1375 case XFS_IOC_ERROR_CLEARALL:
1376 if (!capable(CAP_SYS_ADMIN))
1377 return -EPERM;
1378
1379 return xfs_errortag_clearall(mp);
1380
1381 case XFS_IOC_FREE_EOFBLOCKS: {
1382 struct xfs_fs_eofblocks eofb;
1383 struct xfs_icwalk icw;
1384
1385 if (!capable(CAP_SYS_ADMIN))
1386 return -EPERM;
1387
1388 if (xfs_is_readonly(mp))
1389 return -EROFS;
1390
1391 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1392 return -EFAULT;
1393
1394 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
1395 if (error)
1396 return error;
1397
1398 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
1399
1400 sb_start_write(mp->m_super);
1401 error = xfs_blockgc_free_space(mp, &icw);
1402 sb_end_write(mp->m_super);
1403 return error;
1404 }
1405
1406 case XFS_IOC_EXCHANGE_RANGE:
1407 return xfs_ioc_exchange_range(filp, arg);
1408 case XFS_IOC_START_COMMIT:
1409 return xfs_ioc_start_commit(filp, arg);
1410 case XFS_IOC_COMMIT_RANGE:
1411 return xfs_ioc_commit_range(filp, arg);
1412
1413 default:
1414 return -ENOTTY;
1415 }
1416}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
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_rtalloc.h"
15#include "xfs_iwalk.h"
16#include "xfs_itable.h"
17#include "xfs_error.h"
18#include "xfs_attr.h"
19#include "xfs_bmap.h"
20#include "xfs_bmap_util.h"
21#include "xfs_fsops.h"
22#include "xfs_discard.h"
23#include "xfs_quota.h"
24#include "xfs_export.h"
25#include "xfs_trace.h"
26#include "xfs_icache.h"
27#include "xfs_trans.h"
28#include "xfs_acl.h"
29#include "xfs_btree.h"
30#include <linux/fsmap.h>
31#include "xfs_fsmap.h"
32#include "scrub/xfs_scrub.h"
33#include "xfs_sb.h"
34#include "xfs_ag.h"
35#include "xfs_health.h"
36#include "xfs_reflink.h"
37#include "xfs_ioctl.h"
38#include "xfs_da_format.h"
39#include "xfs_da_btree.h"
40
41#include <linux/mount.h>
42#include <linux/namei.h>
43#include <linux/fileattr.h>
44
45/*
46 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
47 * a file or fs handle.
48 *
49 * XFS_IOC_PATH_TO_FSHANDLE
50 * returns fs handle for a mount point or path within that mount point
51 * XFS_IOC_FD_TO_HANDLE
52 * returns full handle for a FD opened in user space
53 * XFS_IOC_PATH_TO_HANDLE
54 * returns full handle for a path
55 */
56int
57xfs_find_handle(
58 unsigned int cmd,
59 xfs_fsop_handlereq_t *hreq)
60{
61 int hsize;
62 xfs_handle_t handle;
63 struct inode *inode;
64 struct fd f = {NULL};
65 struct path path;
66 int error;
67 struct xfs_inode *ip;
68
69 if (cmd == XFS_IOC_FD_TO_HANDLE) {
70 f = fdget(hreq->fd);
71 if (!f.file)
72 return -EBADF;
73 inode = file_inode(f.file);
74 } else {
75 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
76 if (error)
77 return error;
78 inode = d_inode(path.dentry);
79 }
80 ip = XFS_I(inode);
81
82 /*
83 * We can only generate handles for inodes residing on a XFS filesystem,
84 * and only for regular files, directories or symbolic links.
85 */
86 error = -EINVAL;
87 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
88 goto out_put;
89
90 error = -EBADF;
91 if (!S_ISREG(inode->i_mode) &&
92 !S_ISDIR(inode->i_mode) &&
93 !S_ISLNK(inode->i_mode))
94 goto out_put;
95
96
97 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
98
99 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
100 /*
101 * This handle only contains an fsid, zero the rest.
102 */
103 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
104 hsize = sizeof(xfs_fsid_t);
105 } else {
106 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
107 sizeof(handle.ha_fid.fid_len);
108 handle.ha_fid.fid_pad = 0;
109 handle.ha_fid.fid_gen = inode->i_generation;
110 handle.ha_fid.fid_ino = ip->i_ino;
111 hsize = sizeof(xfs_handle_t);
112 }
113
114 error = -EFAULT;
115 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
116 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
117 goto out_put;
118
119 error = 0;
120
121 out_put:
122 if (cmd == XFS_IOC_FD_TO_HANDLE)
123 fdput(f);
124 else
125 path_put(&path);
126 return error;
127}
128
129/*
130 * No need to do permission checks on the various pathname components
131 * as the handle operations are privileged.
132 */
133STATIC int
134xfs_handle_acceptable(
135 void *context,
136 struct dentry *dentry)
137{
138 return 1;
139}
140
141/*
142 * Convert userspace handle data into a dentry.
143 */
144struct dentry *
145xfs_handle_to_dentry(
146 struct file *parfilp,
147 void __user *uhandle,
148 u32 hlen)
149{
150 xfs_handle_t handle;
151 struct xfs_fid64 fid;
152
153 /*
154 * Only allow handle opens under a directory.
155 */
156 if (!S_ISDIR(file_inode(parfilp)->i_mode))
157 return ERR_PTR(-ENOTDIR);
158
159 if (hlen != sizeof(xfs_handle_t))
160 return ERR_PTR(-EINVAL);
161 if (copy_from_user(&handle, uhandle, hlen))
162 return ERR_PTR(-EFAULT);
163 if (handle.ha_fid.fid_len !=
164 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
165 return ERR_PTR(-EINVAL);
166
167 memset(&fid, 0, sizeof(struct fid));
168 fid.ino = handle.ha_fid.fid_ino;
169 fid.gen = handle.ha_fid.fid_gen;
170
171 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
172 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
173 xfs_handle_acceptable, NULL);
174}
175
176STATIC struct dentry *
177xfs_handlereq_to_dentry(
178 struct file *parfilp,
179 xfs_fsop_handlereq_t *hreq)
180{
181 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
182}
183
184int
185xfs_open_by_handle(
186 struct file *parfilp,
187 xfs_fsop_handlereq_t *hreq)
188{
189 const struct cred *cred = current_cred();
190 int error;
191 int fd;
192 int permflag;
193 struct file *filp;
194 struct inode *inode;
195 struct dentry *dentry;
196 fmode_t fmode;
197 struct path path;
198
199 if (!capable(CAP_SYS_ADMIN))
200 return -EPERM;
201
202 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
203 if (IS_ERR(dentry))
204 return PTR_ERR(dentry);
205 inode = d_inode(dentry);
206
207 /* Restrict xfs_open_by_handle to directories & regular files. */
208 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
209 error = -EPERM;
210 goto out_dput;
211 }
212
213#if BITS_PER_LONG != 32
214 hreq->oflags |= O_LARGEFILE;
215#endif
216
217 permflag = hreq->oflags;
218 fmode = OPEN_FMODE(permflag);
219 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
220 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
221 error = -EPERM;
222 goto out_dput;
223 }
224
225 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
226 error = -EPERM;
227 goto out_dput;
228 }
229
230 /* Can't write directories. */
231 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
232 error = -EISDIR;
233 goto out_dput;
234 }
235
236 fd = get_unused_fd_flags(0);
237 if (fd < 0) {
238 error = fd;
239 goto out_dput;
240 }
241
242 path.mnt = parfilp->f_path.mnt;
243 path.dentry = dentry;
244 filp = dentry_open(&path, hreq->oflags, cred);
245 dput(dentry);
246 if (IS_ERR(filp)) {
247 put_unused_fd(fd);
248 return PTR_ERR(filp);
249 }
250
251 if (S_ISREG(inode->i_mode)) {
252 filp->f_flags |= O_NOATIME;
253 filp->f_mode |= FMODE_NOCMTIME;
254 }
255
256 fd_install(fd, filp);
257 return fd;
258
259 out_dput:
260 dput(dentry);
261 return error;
262}
263
264int
265xfs_readlink_by_handle(
266 struct file *parfilp,
267 xfs_fsop_handlereq_t *hreq)
268{
269 struct dentry *dentry;
270 __u32 olen;
271 int error;
272
273 if (!capable(CAP_SYS_ADMIN))
274 return -EPERM;
275
276 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
277 if (IS_ERR(dentry))
278 return PTR_ERR(dentry);
279
280 /* Restrict this handle operation to symlinks only. */
281 if (!d_is_symlink(dentry)) {
282 error = -EINVAL;
283 goto out_dput;
284 }
285
286 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
287 error = -EFAULT;
288 goto out_dput;
289 }
290
291 error = vfs_readlink(dentry, hreq->ohandle, olen);
292
293 out_dput:
294 dput(dentry);
295 return error;
296}
297
298/*
299 * Format an attribute and copy it out to the user's buffer.
300 * Take care to check values and protect against them changing later,
301 * we may be reading them directly out of a user buffer.
302 */
303static void
304xfs_ioc_attr_put_listent(
305 struct xfs_attr_list_context *context,
306 int flags,
307 unsigned char *name,
308 int namelen,
309 int valuelen)
310{
311 struct xfs_attrlist *alist = context->buffer;
312 struct xfs_attrlist_ent *aep;
313 int arraytop;
314
315 ASSERT(!context->seen_enough);
316 ASSERT(context->count >= 0);
317 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
318 ASSERT(context->firstu >= sizeof(*alist));
319 ASSERT(context->firstu <= context->bufsize);
320
321 /*
322 * Only list entries in the right namespace.
323 */
324 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
325 return;
326
327 arraytop = sizeof(*alist) +
328 context->count * sizeof(alist->al_offset[0]);
329
330 /* decrement by the actual bytes used by the attr */
331 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
332 namelen + 1, sizeof(uint32_t));
333 if (context->firstu < arraytop) {
334 trace_xfs_attr_list_full(context);
335 alist->al_more = 1;
336 context->seen_enough = 1;
337 return;
338 }
339
340 aep = context->buffer + context->firstu;
341 aep->a_valuelen = valuelen;
342 memcpy(aep->a_name, name, namelen);
343 aep->a_name[namelen] = 0;
344 alist->al_offset[context->count++] = context->firstu;
345 alist->al_count = context->count;
346 trace_xfs_attr_list_add(context);
347}
348
349static unsigned int
350xfs_attr_filter(
351 u32 ioc_flags)
352{
353 if (ioc_flags & XFS_IOC_ATTR_ROOT)
354 return XFS_ATTR_ROOT;
355 if (ioc_flags & XFS_IOC_ATTR_SECURE)
356 return XFS_ATTR_SECURE;
357 return 0;
358}
359
360static unsigned int
361xfs_attr_flags(
362 u32 ioc_flags)
363{
364 if (ioc_flags & XFS_IOC_ATTR_CREATE)
365 return XATTR_CREATE;
366 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
367 return XATTR_REPLACE;
368 return 0;
369}
370
371int
372xfs_ioc_attr_list(
373 struct xfs_inode *dp,
374 void __user *ubuf,
375 int bufsize,
376 int flags,
377 struct xfs_attrlist_cursor __user *ucursor)
378{
379 struct xfs_attr_list_context context = { };
380 struct xfs_attrlist *alist;
381 void *buffer;
382 int error;
383
384 if (bufsize < sizeof(struct xfs_attrlist) ||
385 bufsize > XFS_XATTR_LIST_MAX)
386 return -EINVAL;
387
388 /*
389 * Reject flags, only allow namespaces.
390 */
391 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
392 return -EINVAL;
393 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
394 return -EINVAL;
395
396 /*
397 * Validate the cursor.
398 */
399 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
400 return -EFAULT;
401 if (context.cursor.pad1 || context.cursor.pad2)
402 return -EINVAL;
403 if (!context.cursor.initted &&
404 (context.cursor.hashval || context.cursor.blkno ||
405 context.cursor.offset))
406 return -EINVAL;
407
408 buffer = kvzalloc(bufsize, GFP_KERNEL);
409 if (!buffer)
410 return -ENOMEM;
411
412 /*
413 * Initialize the output buffer.
414 */
415 context.dp = dp;
416 context.resynch = 1;
417 context.attr_filter = xfs_attr_filter(flags);
418 context.buffer = buffer;
419 context.bufsize = round_down(bufsize, sizeof(uint32_t));
420 context.firstu = context.bufsize;
421 context.put_listent = xfs_ioc_attr_put_listent;
422
423 alist = context.buffer;
424 alist->al_count = 0;
425 alist->al_more = 0;
426 alist->al_offset[0] = context.bufsize;
427
428 error = xfs_attr_list(&context);
429 if (error)
430 goto out_free;
431
432 if (copy_to_user(ubuf, buffer, bufsize) ||
433 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
434 error = -EFAULT;
435out_free:
436 kmem_free(buffer);
437 return error;
438}
439
440STATIC int
441xfs_attrlist_by_handle(
442 struct file *parfilp,
443 struct xfs_fsop_attrlist_handlereq __user *p)
444{
445 struct xfs_fsop_attrlist_handlereq al_hreq;
446 struct dentry *dentry;
447 int error = -ENOMEM;
448
449 if (!capable(CAP_SYS_ADMIN))
450 return -EPERM;
451 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
452 return -EFAULT;
453
454 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
455 if (IS_ERR(dentry))
456 return PTR_ERR(dentry);
457
458 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
459 al_hreq.buflen, al_hreq.flags, &p->pos);
460 dput(dentry);
461 return error;
462}
463
464static int
465xfs_attrmulti_attr_get(
466 struct inode *inode,
467 unsigned char *name,
468 unsigned char __user *ubuf,
469 uint32_t *len,
470 uint32_t flags)
471{
472 struct xfs_da_args args = {
473 .dp = XFS_I(inode),
474 .attr_filter = xfs_attr_filter(flags),
475 .attr_flags = xfs_attr_flags(flags),
476 .name = name,
477 .namelen = strlen(name),
478 .valuelen = *len,
479 };
480 int error;
481
482 if (*len > XFS_XATTR_SIZE_MAX)
483 return -EINVAL;
484
485 error = xfs_attr_get(&args);
486 if (error)
487 goto out_kfree;
488
489 *len = args.valuelen;
490 if (copy_to_user(ubuf, args.value, args.valuelen))
491 error = -EFAULT;
492
493out_kfree:
494 kmem_free(args.value);
495 return error;
496}
497
498static int
499xfs_attrmulti_attr_set(
500 struct inode *inode,
501 unsigned char *name,
502 const unsigned char __user *ubuf,
503 uint32_t len,
504 uint32_t flags)
505{
506 struct xfs_da_args args = {
507 .dp = XFS_I(inode),
508 .attr_filter = xfs_attr_filter(flags),
509 .attr_flags = xfs_attr_flags(flags),
510 .name = name,
511 .namelen = strlen(name),
512 };
513 int error;
514
515 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
516 return -EPERM;
517
518 if (ubuf) {
519 if (len > XFS_XATTR_SIZE_MAX)
520 return -EINVAL;
521 args.value = memdup_user(ubuf, len);
522 if (IS_ERR(args.value))
523 return PTR_ERR(args.value);
524 args.valuelen = len;
525 }
526
527 error = xfs_attr_set(&args);
528 if (!error && (flags & XFS_IOC_ATTR_ROOT))
529 xfs_forget_acl(inode, name);
530 kfree(args.value);
531 return error;
532}
533
534int
535xfs_ioc_attrmulti_one(
536 struct file *parfilp,
537 struct inode *inode,
538 uint32_t opcode,
539 void __user *uname,
540 void __user *value,
541 uint32_t *len,
542 uint32_t flags)
543{
544 unsigned char *name;
545 int error;
546
547 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
548 return -EINVAL;
549
550 name = strndup_user(uname, MAXNAMELEN);
551 if (IS_ERR(name))
552 return PTR_ERR(name);
553
554 switch (opcode) {
555 case ATTR_OP_GET:
556 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
557 break;
558 case ATTR_OP_REMOVE:
559 value = NULL;
560 *len = 0;
561 fallthrough;
562 case ATTR_OP_SET:
563 error = mnt_want_write_file(parfilp);
564 if (error)
565 break;
566 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
567 mnt_drop_write_file(parfilp);
568 break;
569 default:
570 error = -EINVAL;
571 break;
572 }
573
574 kfree(name);
575 return error;
576}
577
578STATIC int
579xfs_attrmulti_by_handle(
580 struct file *parfilp,
581 void __user *arg)
582{
583 int error;
584 xfs_attr_multiop_t *ops;
585 xfs_fsop_attrmulti_handlereq_t am_hreq;
586 struct dentry *dentry;
587 unsigned int i, size;
588
589 if (!capable(CAP_SYS_ADMIN))
590 return -EPERM;
591 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
592 return -EFAULT;
593
594 /* overflow check */
595 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
596 return -E2BIG;
597
598 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
599 if (IS_ERR(dentry))
600 return PTR_ERR(dentry);
601
602 error = -E2BIG;
603 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
604 if (!size || size > 16 * PAGE_SIZE)
605 goto out_dput;
606
607 ops = memdup_user(am_hreq.ops, size);
608 if (IS_ERR(ops)) {
609 error = PTR_ERR(ops);
610 goto out_dput;
611 }
612
613 error = 0;
614 for (i = 0; i < am_hreq.opcount; i++) {
615 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
616 d_inode(dentry), ops[i].am_opcode,
617 ops[i].am_attrname, ops[i].am_attrvalue,
618 &ops[i].am_length, ops[i].am_flags);
619 }
620
621 if (copy_to_user(am_hreq.ops, ops, size))
622 error = -EFAULT;
623
624 kfree(ops);
625 out_dput:
626 dput(dentry);
627 return error;
628}
629
630int
631xfs_ioc_space(
632 struct file *filp,
633 xfs_flock64_t *bf)
634{
635 struct inode *inode = file_inode(filp);
636 struct xfs_inode *ip = XFS_I(inode);
637 struct iattr iattr;
638 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR;
639 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
640 int error;
641
642 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
643 return -EPERM;
644
645 if (!(filp->f_mode & FMODE_WRITE))
646 return -EBADF;
647
648 if (!S_ISREG(inode->i_mode))
649 return -EINVAL;
650
651 if (xfs_is_always_cow_inode(ip))
652 return -EOPNOTSUPP;
653
654 if (filp->f_flags & O_DSYNC)
655 flags |= XFS_PREALLOC_SYNC;
656 if (filp->f_mode & FMODE_NOCMTIME)
657 flags |= XFS_PREALLOC_INVISIBLE;
658
659 error = mnt_want_write_file(filp);
660 if (error)
661 return error;
662
663 xfs_ilock(ip, iolock);
664 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
665 if (error)
666 goto out_unlock;
667 inode_dio_wait(inode);
668
669 switch (bf->l_whence) {
670 case 0: /*SEEK_SET*/
671 break;
672 case 1: /*SEEK_CUR*/
673 bf->l_start += filp->f_pos;
674 break;
675 case 2: /*SEEK_END*/
676 bf->l_start += XFS_ISIZE(ip);
677 break;
678 default:
679 error = -EINVAL;
680 goto out_unlock;
681 }
682
683 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) {
684 error = -EINVAL;
685 goto out_unlock;
686 }
687
688 if (bf->l_start > XFS_ISIZE(ip)) {
689 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
690 bf->l_start - XFS_ISIZE(ip), 0);
691 if (error)
692 goto out_unlock;
693 }
694
695 iattr.ia_valid = ATTR_SIZE;
696 iattr.ia_size = bf->l_start;
697 error = xfs_vn_setattr_size(file_mnt_user_ns(filp), file_dentry(filp),
698 &iattr);
699 if (error)
700 goto out_unlock;
701
702 error = xfs_update_prealloc_flags(ip, flags);
703
704out_unlock:
705 xfs_iunlock(ip, iolock);
706 mnt_drop_write_file(filp);
707 return error;
708}
709
710/* Return 0 on success or positive error */
711int
712xfs_fsbulkstat_one_fmt(
713 struct xfs_ibulk *breq,
714 const struct xfs_bulkstat *bstat)
715{
716 struct xfs_bstat bs1;
717
718 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
719 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
720 return -EFAULT;
721 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
722}
723
724int
725xfs_fsinumbers_fmt(
726 struct xfs_ibulk *breq,
727 const struct xfs_inumbers *igrp)
728{
729 struct xfs_inogrp ig1;
730
731 xfs_inumbers_to_inogrp(&ig1, igrp);
732 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
733 return -EFAULT;
734 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
735}
736
737STATIC int
738xfs_ioc_fsbulkstat(
739 struct file *file,
740 unsigned int cmd,
741 void __user *arg)
742{
743 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
744 struct xfs_fsop_bulkreq bulkreq;
745 struct xfs_ibulk breq = {
746 .mp = mp,
747 .mnt_userns = file_mnt_user_ns(file),
748 .ocount = 0,
749 };
750 xfs_ino_t lastino;
751 int error;
752
753 /* done = 1 if there are more stats to get and if bulkstat */
754 /* should be called again (unused here, but used in dmapi) */
755
756 if (!capable(CAP_SYS_ADMIN))
757 return -EPERM;
758
759 if (XFS_FORCED_SHUTDOWN(mp))
760 return -EIO;
761
762 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
763 return -EFAULT;
764
765 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
766 return -EFAULT;
767
768 if (bulkreq.icount <= 0)
769 return -EINVAL;
770
771 if (bulkreq.ubuffer == NULL)
772 return -EINVAL;
773
774 breq.ubuffer = bulkreq.ubuffer;
775 breq.icount = bulkreq.icount;
776
777 /*
778 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
779 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
780 * that *lastip contains either zero or the number of the last inode to
781 * be examined by the previous call and return results starting with
782 * the next inode after that. The new bulk request back end functions
783 * take the inode to start with, so we have to compute the startino
784 * parameter from lastino to maintain correct function. lastino == 0
785 * is a special case because it has traditionally meant "first inode
786 * in filesystem".
787 */
788 if (cmd == XFS_IOC_FSINUMBERS) {
789 breq.startino = lastino ? lastino + 1 : 0;
790 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
791 lastino = breq.startino - 1;
792 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
793 breq.startino = lastino;
794 breq.icount = 1;
795 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
796 } else { /* XFS_IOC_FSBULKSTAT */
797 breq.startino = lastino ? lastino + 1 : 0;
798 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
799 lastino = breq.startino - 1;
800 }
801
802 if (error)
803 return error;
804
805 if (bulkreq.lastip != NULL &&
806 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
807 return -EFAULT;
808
809 if (bulkreq.ocount != NULL &&
810 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
811 return -EFAULT;
812
813 return 0;
814}
815
816/* Return 0 on success or positive error */
817static int
818xfs_bulkstat_fmt(
819 struct xfs_ibulk *breq,
820 const struct xfs_bulkstat *bstat)
821{
822 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
823 return -EFAULT;
824 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
825}
826
827/*
828 * Check the incoming bulk request @hdr from userspace and initialize the
829 * internal @breq bulk request appropriately. Returns 0 if the bulk request
830 * should proceed; -ECANCELED if there's nothing to do; or the usual
831 * negative error code.
832 */
833static int
834xfs_bulk_ireq_setup(
835 struct xfs_mount *mp,
836 struct xfs_bulk_ireq *hdr,
837 struct xfs_ibulk *breq,
838 void __user *ubuffer)
839{
840 if (hdr->icount == 0 ||
841 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
842 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
843 return -EINVAL;
844
845 breq->startino = hdr->ino;
846 breq->ubuffer = ubuffer;
847 breq->icount = hdr->icount;
848 breq->ocount = 0;
849 breq->flags = 0;
850
851 /*
852 * The @ino parameter is a special value, so we must look it up here.
853 * We're not allowed to have IREQ_AGNO, and we only return one inode
854 * worth of data.
855 */
856 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
857 if (hdr->flags & XFS_BULK_IREQ_AGNO)
858 return -EINVAL;
859
860 switch (hdr->ino) {
861 case XFS_BULK_IREQ_SPECIAL_ROOT:
862 hdr->ino = mp->m_sb.sb_rootino;
863 break;
864 default:
865 return -EINVAL;
866 }
867 breq->icount = 1;
868 }
869
870 /*
871 * The IREQ_AGNO flag means that we only want results from a given AG.
872 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
873 * beyond the specified AG then we return no results.
874 */
875 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
876 if (hdr->agno >= mp->m_sb.sb_agcount)
877 return -EINVAL;
878
879 if (breq->startino == 0)
880 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
881 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
882 return -EINVAL;
883
884 breq->flags |= XFS_IBULK_SAME_AG;
885
886 /* Asking for an inode past the end of the AG? We're done! */
887 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
888 return -ECANCELED;
889 } else if (hdr->agno)
890 return -EINVAL;
891
892 /* Asking for an inode past the end of the FS? We're done! */
893 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
894 return -ECANCELED;
895
896 return 0;
897}
898
899/*
900 * Update the userspace bulk request @hdr to reflect the end state of the
901 * internal bulk request @breq.
902 */
903static void
904xfs_bulk_ireq_teardown(
905 struct xfs_bulk_ireq *hdr,
906 struct xfs_ibulk *breq)
907{
908 hdr->ino = breq->startino;
909 hdr->ocount = breq->ocount;
910}
911
912/* Handle the v5 bulkstat ioctl. */
913STATIC int
914xfs_ioc_bulkstat(
915 struct file *file,
916 unsigned int cmd,
917 struct xfs_bulkstat_req __user *arg)
918{
919 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
920 struct xfs_bulk_ireq hdr;
921 struct xfs_ibulk breq = {
922 .mp = mp,
923 .mnt_userns = file_mnt_user_ns(file),
924 };
925 int error;
926
927 if (!capable(CAP_SYS_ADMIN))
928 return -EPERM;
929
930 if (XFS_FORCED_SHUTDOWN(mp))
931 return -EIO;
932
933 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
934 return -EFAULT;
935
936 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
937 if (error == -ECANCELED)
938 goto out_teardown;
939 if (error < 0)
940 return error;
941
942 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
943 if (error)
944 return error;
945
946out_teardown:
947 xfs_bulk_ireq_teardown(&hdr, &breq);
948 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
949 return -EFAULT;
950
951 return 0;
952}
953
954STATIC int
955xfs_inumbers_fmt(
956 struct xfs_ibulk *breq,
957 const struct xfs_inumbers *igrp)
958{
959 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
960 return -EFAULT;
961 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
962}
963
964/* Handle the v5 inumbers ioctl. */
965STATIC int
966xfs_ioc_inumbers(
967 struct xfs_mount *mp,
968 unsigned int cmd,
969 struct xfs_inumbers_req __user *arg)
970{
971 struct xfs_bulk_ireq hdr;
972 struct xfs_ibulk breq = {
973 .mp = mp,
974 };
975 int error;
976
977 if (!capable(CAP_SYS_ADMIN))
978 return -EPERM;
979
980 if (XFS_FORCED_SHUTDOWN(mp))
981 return -EIO;
982
983 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
984 return -EFAULT;
985
986 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
987 if (error == -ECANCELED)
988 goto out_teardown;
989 if (error < 0)
990 return error;
991
992 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
993 if (error)
994 return error;
995
996out_teardown:
997 xfs_bulk_ireq_teardown(&hdr, &breq);
998 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
999 return -EFAULT;
1000
1001 return 0;
1002}
1003
1004STATIC int
1005xfs_ioc_fsgeometry(
1006 struct xfs_mount *mp,
1007 void __user *arg,
1008 int struct_version)
1009{
1010 struct xfs_fsop_geom fsgeo;
1011 size_t len;
1012
1013 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version);
1014
1015 if (struct_version <= 3)
1016 len = sizeof(struct xfs_fsop_geom_v1);
1017 else if (struct_version == 4)
1018 len = sizeof(struct xfs_fsop_geom_v4);
1019 else {
1020 xfs_fsop_geom_health(mp, &fsgeo);
1021 len = sizeof(fsgeo);
1022 }
1023
1024 if (copy_to_user(arg, &fsgeo, len))
1025 return -EFAULT;
1026 return 0;
1027}
1028
1029STATIC int
1030xfs_ioc_ag_geometry(
1031 struct xfs_mount *mp,
1032 void __user *arg)
1033{
1034 struct xfs_ag_geometry ageo;
1035 int error;
1036
1037 if (copy_from_user(&ageo, arg, sizeof(ageo)))
1038 return -EFAULT;
1039 if (ageo.ag_flags)
1040 return -EINVAL;
1041 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
1042 return -EINVAL;
1043
1044 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1045 if (error)
1046 return error;
1047
1048 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1049 return -EFAULT;
1050 return 0;
1051}
1052
1053/*
1054 * Linux extended inode flags interface.
1055 */
1056
1057static void
1058xfs_fill_fsxattr(
1059 struct xfs_inode *ip,
1060 int whichfork,
1061 struct fileattr *fa)
1062{
1063 struct xfs_mount *mp = ip->i_mount;
1064 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
1065
1066 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
1067
1068 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
1069 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1070 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
1071 /*
1072 * Don't let a misaligned extent size hint on a directory
1073 * escape to userspace if it won't pass the setattr checks
1074 * later.
1075 */
1076 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
1077 ip->i_extsize % mp->m_sb.sb_rextsize > 0) {
1078 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
1079 FS_XFLAG_EXTSZINHERIT);
1080 fa->fsx_extsize = 0;
1081 } else {
1082 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1083 }
1084 }
1085
1086 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1087 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
1088 fa->fsx_projid = ip->i_projid;
1089 if (ifp && !xfs_need_iread_extents(ifp))
1090 fa->fsx_nextents = xfs_iext_count(ifp);
1091 else
1092 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1093}
1094
1095STATIC int
1096xfs_ioc_fsgetxattra(
1097 xfs_inode_t *ip,
1098 void __user *arg)
1099{
1100 struct fileattr fa;
1101
1102 xfs_ilock(ip, XFS_ILOCK_SHARED);
1103 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
1104 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1105
1106 return copy_fsxattr_to_user(&fa, arg);
1107}
1108
1109int
1110xfs_fileattr_get(
1111 struct dentry *dentry,
1112 struct fileattr *fa)
1113{
1114 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1115
1116 if (d_is_special(dentry))
1117 return -ENOTTY;
1118
1119 xfs_ilock(ip, XFS_ILOCK_SHARED);
1120 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
1121 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1122
1123 return 0;
1124}
1125
1126STATIC uint16_t
1127xfs_flags2diflags(
1128 struct xfs_inode *ip,
1129 unsigned int xflags)
1130{
1131 /* can't set PREALLOC this way, just preserve it */
1132 uint16_t di_flags =
1133 (ip->i_diflags & XFS_DIFLAG_PREALLOC);
1134
1135 if (xflags & FS_XFLAG_IMMUTABLE)
1136 di_flags |= XFS_DIFLAG_IMMUTABLE;
1137 if (xflags & FS_XFLAG_APPEND)
1138 di_flags |= XFS_DIFLAG_APPEND;
1139 if (xflags & FS_XFLAG_SYNC)
1140 di_flags |= XFS_DIFLAG_SYNC;
1141 if (xflags & FS_XFLAG_NOATIME)
1142 di_flags |= XFS_DIFLAG_NOATIME;
1143 if (xflags & FS_XFLAG_NODUMP)
1144 di_flags |= XFS_DIFLAG_NODUMP;
1145 if (xflags & FS_XFLAG_NODEFRAG)
1146 di_flags |= XFS_DIFLAG_NODEFRAG;
1147 if (xflags & FS_XFLAG_FILESTREAM)
1148 di_flags |= XFS_DIFLAG_FILESTREAM;
1149 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1150 if (xflags & FS_XFLAG_RTINHERIT)
1151 di_flags |= XFS_DIFLAG_RTINHERIT;
1152 if (xflags & FS_XFLAG_NOSYMLINKS)
1153 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1154 if (xflags & FS_XFLAG_EXTSZINHERIT)
1155 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1156 if (xflags & FS_XFLAG_PROJINHERIT)
1157 di_flags |= XFS_DIFLAG_PROJINHERIT;
1158 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1159 if (xflags & FS_XFLAG_REALTIME)
1160 di_flags |= XFS_DIFLAG_REALTIME;
1161 if (xflags & FS_XFLAG_EXTSIZE)
1162 di_flags |= XFS_DIFLAG_EXTSIZE;
1163 }
1164
1165 return di_flags;
1166}
1167
1168STATIC uint64_t
1169xfs_flags2diflags2(
1170 struct xfs_inode *ip,
1171 unsigned int xflags)
1172{
1173 uint64_t di_flags2 =
1174 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
1175 XFS_DIFLAG2_BIGTIME));
1176
1177 if (xflags & FS_XFLAG_DAX)
1178 di_flags2 |= XFS_DIFLAG2_DAX;
1179 if (xflags & FS_XFLAG_COWEXTSIZE)
1180 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1181
1182 return di_flags2;
1183}
1184
1185static int
1186xfs_ioctl_setattr_xflags(
1187 struct xfs_trans *tp,
1188 struct xfs_inode *ip,
1189 struct fileattr *fa)
1190{
1191 struct xfs_mount *mp = ip->i_mount;
1192 uint64_t i_flags2;
1193
1194 /* Can't change realtime flag if any extents are allocated. */
1195 if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
1196 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1197 return -EINVAL;
1198
1199 /* If realtime flag is set then must have realtime device */
1200 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1201 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1202 (ip->i_extsize % mp->m_sb.sb_rextsize))
1203 return -EINVAL;
1204 }
1205
1206 /* Clear reflink if we are actually able to set the rt flag. */
1207 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1208 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
1209
1210 /* Don't allow us to set DAX mode for a reflinked file for now. */
1211 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1212 return -EINVAL;
1213
1214 /* diflags2 only valid for v3 inodes. */
1215 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1216 if (i_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb))
1217 return -EINVAL;
1218
1219 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1220 ip->i_diflags2 = i_flags2;
1221
1222 xfs_diflags_to_iflags(ip, false);
1223 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1224 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1225 XFS_STATS_INC(mp, xs_ig_attrchg);
1226 return 0;
1227}
1228
1229static void
1230xfs_ioctl_setattr_prepare_dax(
1231 struct xfs_inode *ip,
1232 struct fileattr *fa)
1233{
1234 struct xfs_mount *mp = ip->i_mount;
1235 struct inode *inode = VFS_I(ip);
1236
1237 if (S_ISDIR(inode->i_mode))
1238 return;
1239
1240 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) ||
1241 (mp->m_flags & XFS_MOUNT_DAX_NEVER))
1242 return;
1243
1244 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1245 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
1246 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1247 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
1248 d_mark_dontcache(inode);
1249}
1250
1251/*
1252 * Set up the transaction structure for the setattr operation, checking that we
1253 * have permission to do so. On success, return a clean transaction and the
1254 * inode locked exclusively ready for further operation specific checks. On
1255 * failure, return an error without modifying or locking the inode.
1256 */
1257static struct xfs_trans *
1258xfs_ioctl_setattr_get_trans(
1259 struct xfs_inode *ip,
1260 struct xfs_dquot *pdqp)
1261{
1262 struct xfs_mount *mp = ip->i_mount;
1263 struct xfs_trans *tp;
1264 int error = -EROFS;
1265
1266 if (mp->m_flags & XFS_MOUNT_RDONLY)
1267 goto out_error;
1268 error = -EIO;
1269 if (XFS_FORCED_SHUTDOWN(mp))
1270 goto out_error;
1271
1272 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
1273 capable(CAP_FOWNER), &tp);
1274 if (error)
1275 goto out_error;
1276
1277 if (mp->m_flags & XFS_MOUNT_WSYNC)
1278 xfs_trans_set_sync(tp);
1279
1280 return tp;
1281
1282out_error:
1283 return ERR_PTR(error);
1284}
1285
1286/*
1287 * Validate a proposed extent size hint. For regular files, the hint can only
1288 * be changed if no extents are allocated.
1289 */
1290static int
1291xfs_ioctl_setattr_check_extsize(
1292 struct xfs_inode *ip,
1293 struct fileattr *fa)
1294{
1295 struct xfs_mount *mp = ip->i_mount;
1296 xfs_failaddr_t failaddr;
1297 uint16_t new_diflags;
1298
1299 if (!fa->fsx_valid)
1300 return 0;
1301
1302 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1303 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
1304 return -EINVAL;
1305
1306 if (fa->fsx_extsize & mp->m_blockmask)
1307 return -EINVAL;
1308
1309 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1310
1311 /*
1312 * Inode verifiers do not check that the extent size hint is an integer
1313 * multiple of the rt extent size on a directory with both rtinherit
1314 * and extszinherit flags set. Don't let sysadmins misconfigure
1315 * directories.
1316 */
1317 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
1318 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
1319 unsigned int rtextsize_bytes;
1320
1321 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
1322 if (fa->fsx_extsize % rtextsize_bytes)
1323 return -EINVAL;
1324 }
1325
1326 failaddr = xfs_inode_validate_extsize(ip->i_mount,
1327 XFS_B_TO_FSB(mp, fa->fsx_extsize),
1328 VFS_I(ip)->i_mode, new_diflags);
1329 return failaddr != NULL ? -EINVAL : 0;
1330}
1331
1332static int
1333xfs_ioctl_setattr_check_cowextsize(
1334 struct xfs_inode *ip,
1335 struct fileattr *fa)
1336{
1337 struct xfs_mount *mp = ip->i_mount;
1338 xfs_failaddr_t failaddr;
1339 uint64_t new_diflags2;
1340 uint16_t new_diflags;
1341
1342 if (!fa->fsx_valid)
1343 return 0;
1344
1345 if (fa->fsx_cowextsize & mp->m_blockmask)
1346 return -EINVAL;
1347
1348 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1349 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1350
1351 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
1352 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
1353 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
1354 return failaddr != NULL ? -EINVAL : 0;
1355}
1356
1357static int
1358xfs_ioctl_setattr_check_projid(
1359 struct xfs_inode *ip,
1360 struct fileattr *fa)
1361{
1362 if (!fa->fsx_valid)
1363 return 0;
1364
1365 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1366 if (fa->fsx_projid > (uint16_t)-1 &&
1367 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1368 return -EINVAL;
1369 return 0;
1370}
1371
1372int
1373xfs_fileattr_set(
1374 struct user_namespace *mnt_userns,
1375 struct dentry *dentry,
1376 struct fileattr *fa)
1377{
1378 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1379 struct xfs_mount *mp = ip->i_mount;
1380 struct xfs_trans *tp;
1381 struct xfs_dquot *pdqp = NULL;
1382 struct xfs_dquot *olddquot = NULL;
1383 int error;
1384
1385 trace_xfs_ioctl_setattr(ip);
1386
1387 if (d_is_special(dentry))
1388 return -ENOTTY;
1389
1390 if (!fa->fsx_valid) {
1391 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1392 FS_NOATIME_FL | FS_NODUMP_FL |
1393 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1394 return -EOPNOTSUPP;
1395 }
1396
1397 error = xfs_ioctl_setattr_check_projid(ip, fa);
1398 if (error)
1399 return error;
1400
1401 /*
1402 * If disk quotas is on, we make sure that the dquots do exist on disk,
1403 * before we start any other transactions. Trying to do this later
1404 * is messy. We don't care to take a readlock to look at the ids
1405 * in inode here, because we can't hold it across the trans_reserve.
1406 * If the IDs do change before we take the ilock, we're covered
1407 * because the i_*dquot fields will get updated anyway.
1408 */
1409 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
1410 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1411 VFS_I(ip)->i_gid, fa->fsx_projid,
1412 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1413 if (error)
1414 return error;
1415 }
1416
1417 xfs_ioctl_setattr_prepare_dax(ip, fa);
1418
1419 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
1420 if (IS_ERR(tp)) {
1421 error = PTR_ERR(tp);
1422 goto error_free_dquots;
1423 }
1424
1425 error = xfs_ioctl_setattr_check_extsize(ip, fa);
1426 if (error)
1427 goto error_trans_cancel;
1428
1429 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1430 if (error)
1431 goto error_trans_cancel;
1432
1433 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1434 if (error)
1435 goto error_trans_cancel;
1436
1437 if (!fa->fsx_valid)
1438 goto skip_xattr;
1439 /*
1440 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1441 * overrides the following restrictions:
1442 *
1443 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1444 * successful return from chown()
1445 */
1446
1447 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1448 !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID))
1449 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1450
1451 /* Change the ownerships and register project quota modifications */
1452 if (ip->i_projid != fa->fsx_projid) {
1453 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1454 olddquot = xfs_qm_vop_chown(tp, ip,
1455 &ip->i_pdquot, pdqp);
1456 }
1457 ip->i_projid = fa->fsx_projid;
1458 }
1459
1460 /*
1461 * Only set the extent size hint if we've already determined that the
1462 * extent size hint should be set on the inode. If no extent size flags
1463 * are set on the inode then unconditionally clear the extent size hint.
1464 */
1465 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1466 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1467 else
1468 ip->i_extsize = 0;
1469
1470 if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
1471 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1472 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1473 else
1474 ip->i_cowextsize = 0;
1475 }
1476
1477skip_xattr:
1478 error = xfs_trans_commit(tp);
1479
1480 /*
1481 * Release any dquot(s) the inode had kept before chown.
1482 */
1483 xfs_qm_dqrele(olddquot);
1484 xfs_qm_dqrele(pdqp);
1485
1486 return error;
1487
1488error_trans_cancel:
1489 xfs_trans_cancel(tp);
1490error_free_dquots:
1491 xfs_qm_dqrele(pdqp);
1492 return error;
1493}
1494
1495static bool
1496xfs_getbmap_format(
1497 struct kgetbmap *p,
1498 struct getbmapx __user *u,
1499 size_t recsize)
1500{
1501 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1502 put_user(p->bmv_block, &u->bmv_block) ||
1503 put_user(p->bmv_length, &u->bmv_length) ||
1504 put_user(0, &u->bmv_count) ||
1505 put_user(0, &u->bmv_entries))
1506 return false;
1507 if (recsize < sizeof(struct getbmapx))
1508 return true;
1509 if (put_user(0, &u->bmv_iflags) ||
1510 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1511 put_user(0, &u->bmv_unused1) ||
1512 put_user(0, &u->bmv_unused2))
1513 return false;
1514 return true;
1515}
1516
1517STATIC int
1518xfs_ioc_getbmap(
1519 struct file *file,
1520 unsigned int cmd,
1521 void __user *arg)
1522{
1523 struct getbmapx bmx = { 0 };
1524 struct kgetbmap *buf;
1525 size_t recsize;
1526 int error, i;
1527
1528 switch (cmd) {
1529 case XFS_IOC_GETBMAPA:
1530 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1531 fallthrough;
1532 case XFS_IOC_GETBMAP:
1533 /* struct getbmap is a strict subset of struct getbmapx. */
1534 recsize = sizeof(struct getbmap);
1535 break;
1536 case XFS_IOC_GETBMAPX:
1537 recsize = sizeof(struct getbmapx);
1538 break;
1539 default:
1540 return -EINVAL;
1541 }
1542
1543 if (copy_from_user(&bmx, arg, recsize))
1544 return -EFAULT;
1545
1546 if (bmx.bmv_count < 2)
1547 return -EINVAL;
1548 if (bmx.bmv_count > ULONG_MAX / recsize)
1549 return -ENOMEM;
1550
1551 buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL);
1552 if (!buf)
1553 return -ENOMEM;
1554
1555 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1556 if (error)
1557 goto out_free_buf;
1558
1559 error = -EFAULT;
1560 if (copy_to_user(arg, &bmx, recsize))
1561 goto out_free_buf;
1562 arg += recsize;
1563
1564 for (i = 0; i < bmx.bmv_entries; i++) {
1565 if (!xfs_getbmap_format(buf + i, arg, recsize))
1566 goto out_free_buf;
1567 arg += recsize;
1568 }
1569
1570 error = 0;
1571out_free_buf:
1572 kmem_free(buf);
1573 return error;
1574}
1575
1576STATIC int
1577xfs_ioc_getfsmap(
1578 struct xfs_inode *ip,
1579 struct fsmap_head __user *arg)
1580{
1581 struct xfs_fsmap_head xhead = {0};
1582 struct fsmap_head head;
1583 struct fsmap *recs;
1584 unsigned int count;
1585 __u32 last_flags = 0;
1586 bool done = false;
1587 int error;
1588
1589 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1590 return -EFAULT;
1591 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1592 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1593 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1594 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1595 sizeof(head.fmh_keys[1].fmr_reserved)))
1596 return -EINVAL;
1597
1598 /*
1599 * Use an internal memory buffer so that we don't have to copy fsmap
1600 * data to userspace while holding locks. Start by trying to allocate
1601 * up to 128k for the buffer, but fall back to a single page if needed.
1602 */
1603 count = min_t(unsigned int, head.fmh_count,
1604 131072 / sizeof(struct fsmap));
1605 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
1606 if (!recs) {
1607 count = min_t(unsigned int, head.fmh_count,
1608 PAGE_SIZE / sizeof(struct fsmap));
1609 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
1610 if (!recs)
1611 return -ENOMEM;
1612 }
1613
1614 xhead.fmh_iflags = head.fmh_iflags;
1615 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1616 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1617
1618 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1619 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1620
1621 head.fmh_entries = 0;
1622 do {
1623 struct fsmap __user *user_recs;
1624 struct fsmap *last_rec;
1625
1626 user_recs = &arg->fmh_recs[head.fmh_entries];
1627 xhead.fmh_entries = 0;
1628 xhead.fmh_count = min_t(unsigned int, count,
1629 head.fmh_count - head.fmh_entries);
1630
1631 /* Run query, record how many entries we got. */
1632 error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1633 switch (error) {
1634 case 0:
1635 /*
1636 * There are no more records in the result set. Copy
1637 * whatever we got to userspace and break out.
1638 */
1639 done = true;
1640 break;
1641 case -ECANCELED:
1642 /*
1643 * The internal memory buffer is full. Copy whatever
1644 * records we got to userspace and go again if we have
1645 * not yet filled the userspace buffer.
1646 */
1647 error = 0;
1648 break;
1649 default:
1650 goto out_free;
1651 }
1652 head.fmh_entries += xhead.fmh_entries;
1653 head.fmh_oflags = xhead.fmh_oflags;
1654
1655 /*
1656 * If the caller wanted a record count or there aren't any
1657 * new records to return, we're done.
1658 */
1659 if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1660 break;
1661
1662 /* Copy all the records we got out to userspace. */
1663 if (copy_to_user(user_recs, recs,
1664 xhead.fmh_entries * sizeof(struct fsmap))) {
1665 error = -EFAULT;
1666 goto out_free;
1667 }
1668
1669 /* Remember the last record flags we copied to userspace. */
1670 last_rec = &recs[xhead.fmh_entries - 1];
1671 last_flags = last_rec->fmr_flags;
1672
1673 /* Set up the low key for the next iteration. */
1674 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1675 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1676 } while (!done && head.fmh_entries < head.fmh_count);
1677
1678 /*
1679 * If there are no more records in the query result set and we're not
1680 * in counting mode, mark the last record returned with the LAST flag.
1681 */
1682 if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1683 struct fsmap __user *user_rec;
1684
1685 last_flags |= FMR_OF_LAST;
1686 user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1687
1688 if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1689 sizeof(last_flags))) {
1690 error = -EFAULT;
1691 goto out_free;
1692 }
1693 }
1694
1695 /* copy back header */
1696 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1697 error = -EFAULT;
1698 goto out_free;
1699 }
1700
1701out_free:
1702 kmem_free(recs);
1703 return error;
1704}
1705
1706STATIC int
1707xfs_ioc_scrub_metadata(
1708 struct file *file,
1709 void __user *arg)
1710{
1711 struct xfs_scrub_metadata scrub;
1712 int error;
1713
1714 if (!capable(CAP_SYS_ADMIN))
1715 return -EPERM;
1716
1717 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1718 return -EFAULT;
1719
1720 error = xfs_scrub_metadata(file, &scrub);
1721 if (error)
1722 return error;
1723
1724 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1725 return -EFAULT;
1726
1727 return 0;
1728}
1729
1730int
1731xfs_ioc_swapext(
1732 xfs_swapext_t *sxp)
1733{
1734 xfs_inode_t *ip, *tip;
1735 struct fd f, tmp;
1736 int error = 0;
1737
1738 /* Pull information for the target fd */
1739 f = fdget((int)sxp->sx_fdtarget);
1740 if (!f.file) {
1741 error = -EINVAL;
1742 goto out;
1743 }
1744
1745 if (!(f.file->f_mode & FMODE_WRITE) ||
1746 !(f.file->f_mode & FMODE_READ) ||
1747 (f.file->f_flags & O_APPEND)) {
1748 error = -EBADF;
1749 goto out_put_file;
1750 }
1751
1752 tmp = fdget((int)sxp->sx_fdtmp);
1753 if (!tmp.file) {
1754 error = -EINVAL;
1755 goto out_put_file;
1756 }
1757
1758 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1759 !(tmp.file->f_mode & FMODE_READ) ||
1760 (tmp.file->f_flags & O_APPEND)) {
1761 error = -EBADF;
1762 goto out_put_tmp_file;
1763 }
1764
1765 if (IS_SWAPFILE(file_inode(f.file)) ||
1766 IS_SWAPFILE(file_inode(tmp.file))) {
1767 error = -EINVAL;
1768 goto out_put_tmp_file;
1769 }
1770
1771 /*
1772 * We need to ensure that the fds passed in point to XFS inodes
1773 * before we cast and access them as XFS structures as we have no
1774 * control over what the user passes us here.
1775 */
1776 if (f.file->f_op != &xfs_file_operations ||
1777 tmp.file->f_op != &xfs_file_operations) {
1778 error = -EINVAL;
1779 goto out_put_tmp_file;
1780 }
1781
1782 ip = XFS_I(file_inode(f.file));
1783 tip = XFS_I(file_inode(tmp.file));
1784
1785 if (ip->i_mount != tip->i_mount) {
1786 error = -EINVAL;
1787 goto out_put_tmp_file;
1788 }
1789
1790 if (ip->i_ino == tip->i_ino) {
1791 error = -EINVAL;
1792 goto out_put_tmp_file;
1793 }
1794
1795 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1796 error = -EIO;
1797 goto out_put_tmp_file;
1798 }
1799
1800 error = xfs_swap_extents(ip, tip, sxp);
1801
1802 out_put_tmp_file:
1803 fdput(tmp);
1804 out_put_file:
1805 fdput(f);
1806 out:
1807 return error;
1808}
1809
1810static int
1811xfs_ioc_getlabel(
1812 struct xfs_mount *mp,
1813 char __user *user_label)
1814{
1815 struct xfs_sb *sbp = &mp->m_sb;
1816 char label[XFSLABEL_MAX + 1];
1817
1818 /* Paranoia */
1819 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1820
1821 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1822 memset(label, 0, sizeof(label));
1823 spin_lock(&mp->m_sb_lock);
1824 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1825 spin_unlock(&mp->m_sb_lock);
1826
1827 if (copy_to_user(user_label, label, sizeof(label)))
1828 return -EFAULT;
1829 return 0;
1830}
1831
1832static int
1833xfs_ioc_setlabel(
1834 struct file *filp,
1835 struct xfs_mount *mp,
1836 char __user *newlabel)
1837{
1838 struct xfs_sb *sbp = &mp->m_sb;
1839 char label[XFSLABEL_MAX + 1];
1840 size_t len;
1841 int error;
1842
1843 if (!capable(CAP_SYS_ADMIN))
1844 return -EPERM;
1845 /*
1846 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1847 * smaller, at 12 bytes. We copy one more to be sure we find the
1848 * (required) NULL character to test the incoming label length.
1849 * NB: The on disk label doesn't need to be null terminated.
1850 */
1851 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1852 return -EFAULT;
1853 len = strnlen(label, XFSLABEL_MAX + 1);
1854 if (len > sizeof(sbp->sb_fname))
1855 return -EINVAL;
1856
1857 error = mnt_want_write_file(filp);
1858 if (error)
1859 return error;
1860
1861 spin_lock(&mp->m_sb_lock);
1862 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1863 memcpy(sbp->sb_fname, label, len);
1864 spin_unlock(&mp->m_sb_lock);
1865
1866 /*
1867 * Now we do several things to satisfy userspace.
1868 * In addition to normal logging of the primary superblock, we also
1869 * immediately write these changes to sector zero for the primary, then
1870 * update all backup supers (as xfs_db does for a label change), then
1871 * invalidate the block device page cache. This is so that any prior
1872 * buffered reads from userspace (i.e. from blkid) are invalidated,
1873 * and userspace will see the newly-written label.
1874 */
1875 error = xfs_sync_sb_buf(mp);
1876 if (error)
1877 goto out;
1878 /*
1879 * growfs also updates backup supers so lock against that.
1880 */
1881 mutex_lock(&mp->m_growlock);
1882 error = xfs_update_secondary_sbs(mp);
1883 mutex_unlock(&mp->m_growlock);
1884
1885 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1886
1887out:
1888 mnt_drop_write_file(filp);
1889 return error;
1890}
1891
1892static inline int
1893xfs_fs_eofblocks_from_user(
1894 struct xfs_fs_eofblocks *src,
1895 struct xfs_icwalk *dst)
1896{
1897 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1898 return -EINVAL;
1899
1900 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1901 return -EINVAL;
1902
1903 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1904 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1905 return -EINVAL;
1906
1907 dst->icw_flags = 0;
1908 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1909 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1910 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1911 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1912 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1913 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1914 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1915 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1916 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1917 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1918
1919 dst->icw_prid = src->eof_prid;
1920 dst->icw_min_file_size = src->eof_min_file_size;
1921
1922 dst->icw_uid = INVALID_UID;
1923 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1924 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1925 if (!uid_valid(dst->icw_uid))
1926 return -EINVAL;
1927 }
1928
1929 dst->icw_gid = INVALID_GID;
1930 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1931 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1932 if (!gid_valid(dst->icw_gid))
1933 return -EINVAL;
1934 }
1935 return 0;
1936}
1937
1938/*
1939 * Note: some of the ioctl's return positive numbers as a
1940 * byte count indicating success, such as readlink_by_handle.
1941 * So we don't "sign flip" like most other routines. This means
1942 * true errors need to be returned as a negative value.
1943 */
1944long
1945xfs_file_ioctl(
1946 struct file *filp,
1947 unsigned int cmd,
1948 unsigned long p)
1949{
1950 struct inode *inode = file_inode(filp);
1951 struct xfs_inode *ip = XFS_I(inode);
1952 struct xfs_mount *mp = ip->i_mount;
1953 void __user *arg = (void __user *)p;
1954 int error;
1955
1956 trace_xfs_file_ioctl(ip);
1957
1958 switch (cmd) {
1959 case FITRIM:
1960 return xfs_ioc_trim(mp, arg);
1961 case FS_IOC_GETFSLABEL:
1962 return xfs_ioc_getlabel(mp, arg);
1963 case FS_IOC_SETFSLABEL:
1964 return xfs_ioc_setlabel(filp, mp, arg);
1965 case XFS_IOC_ALLOCSP:
1966 case XFS_IOC_FREESP:
1967 case XFS_IOC_ALLOCSP64:
1968 case XFS_IOC_FREESP64: {
1969 xfs_flock64_t bf;
1970
1971 if (copy_from_user(&bf, arg, sizeof(bf)))
1972 return -EFAULT;
1973 return xfs_ioc_space(filp, &bf);
1974 }
1975 case XFS_IOC_DIOINFO: {
1976 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1977 struct dioattr da;
1978
1979 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1980 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1981
1982 if (copy_to_user(arg, &da, sizeof(da)))
1983 return -EFAULT;
1984 return 0;
1985 }
1986
1987 case XFS_IOC_FSBULKSTAT_SINGLE:
1988 case XFS_IOC_FSBULKSTAT:
1989 case XFS_IOC_FSINUMBERS:
1990 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1991
1992 case XFS_IOC_BULKSTAT:
1993 return xfs_ioc_bulkstat(filp, cmd, arg);
1994 case XFS_IOC_INUMBERS:
1995 return xfs_ioc_inumbers(mp, cmd, arg);
1996
1997 case XFS_IOC_FSGEOMETRY_V1:
1998 return xfs_ioc_fsgeometry(mp, arg, 3);
1999 case XFS_IOC_FSGEOMETRY_V4:
2000 return xfs_ioc_fsgeometry(mp, arg, 4);
2001 case XFS_IOC_FSGEOMETRY:
2002 return xfs_ioc_fsgeometry(mp, arg, 5);
2003
2004 case XFS_IOC_AG_GEOMETRY:
2005 return xfs_ioc_ag_geometry(mp, arg);
2006
2007 case XFS_IOC_GETVERSION:
2008 return put_user(inode->i_generation, (int __user *)arg);
2009
2010 case XFS_IOC_FSGETXATTRA:
2011 return xfs_ioc_fsgetxattra(ip, arg);
2012
2013 case XFS_IOC_GETBMAP:
2014 case XFS_IOC_GETBMAPA:
2015 case XFS_IOC_GETBMAPX:
2016 return xfs_ioc_getbmap(filp, cmd, arg);
2017
2018 case FS_IOC_GETFSMAP:
2019 return xfs_ioc_getfsmap(ip, arg);
2020
2021 case XFS_IOC_SCRUB_METADATA:
2022 return xfs_ioc_scrub_metadata(filp, arg);
2023
2024 case XFS_IOC_FD_TO_HANDLE:
2025 case XFS_IOC_PATH_TO_HANDLE:
2026 case XFS_IOC_PATH_TO_FSHANDLE: {
2027 xfs_fsop_handlereq_t hreq;
2028
2029 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2030 return -EFAULT;
2031 return xfs_find_handle(cmd, &hreq);
2032 }
2033 case XFS_IOC_OPEN_BY_HANDLE: {
2034 xfs_fsop_handlereq_t hreq;
2035
2036 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2037 return -EFAULT;
2038 return xfs_open_by_handle(filp, &hreq);
2039 }
2040
2041 case XFS_IOC_READLINK_BY_HANDLE: {
2042 xfs_fsop_handlereq_t hreq;
2043
2044 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2045 return -EFAULT;
2046 return xfs_readlink_by_handle(filp, &hreq);
2047 }
2048 case XFS_IOC_ATTRLIST_BY_HANDLE:
2049 return xfs_attrlist_by_handle(filp, arg);
2050
2051 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2052 return xfs_attrmulti_by_handle(filp, arg);
2053
2054 case XFS_IOC_SWAPEXT: {
2055 struct xfs_swapext sxp;
2056
2057 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2058 return -EFAULT;
2059 error = mnt_want_write_file(filp);
2060 if (error)
2061 return error;
2062 error = xfs_ioc_swapext(&sxp);
2063 mnt_drop_write_file(filp);
2064 return error;
2065 }
2066
2067 case XFS_IOC_FSCOUNTS: {
2068 xfs_fsop_counts_t out;
2069
2070 xfs_fs_counts(mp, &out);
2071
2072 if (copy_to_user(arg, &out, sizeof(out)))
2073 return -EFAULT;
2074 return 0;
2075 }
2076
2077 case XFS_IOC_SET_RESBLKS: {
2078 xfs_fsop_resblks_t inout;
2079 uint64_t in;
2080
2081 if (!capable(CAP_SYS_ADMIN))
2082 return -EPERM;
2083
2084 if (mp->m_flags & XFS_MOUNT_RDONLY)
2085 return -EROFS;
2086
2087 if (copy_from_user(&inout, arg, sizeof(inout)))
2088 return -EFAULT;
2089
2090 error = mnt_want_write_file(filp);
2091 if (error)
2092 return error;
2093
2094 /* input parameter is passed in resblks field of structure */
2095 in = inout.resblks;
2096 error = xfs_reserve_blocks(mp, &in, &inout);
2097 mnt_drop_write_file(filp);
2098 if (error)
2099 return error;
2100
2101 if (copy_to_user(arg, &inout, sizeof(inout)))
2102 return -EFAULT;
2103 return 0;
2104 }
2105
2106 case XFS_IOC_GET_RESBLKS: {
2107 xfs_fsop_resblks_t out;
2108
2109 if (!capable(CAP_SYS_ADMIN))
2110 return -EPERM;
2111
2112 error = xfs_reserve_blocks(mp, NULL, &out);
2113 if (error)
2114 return error;
2115
2116 if (copy_to_user(arg, &out, sizeof(out)))
2117 return -EFAULT;
2118
2119 return 0;
2120 }
2121
2122 case XFS_IOC_FSGROWFSDATA: {
2123 struct xfs_growfs_data in;
2124
2125 if (copy_from_user(&in, arg, sizeof(in)))
2126 return -EFAULT;
2127
2128 error = mnt_want_write_file(filp);
2129 if (error)
2130 return error;
2131 error = xfs_growfs_data(mp, &in);
2132 mnt_drop_write_file(filp);
2133 return error;
2134 }
2135
2136 case XFS_IOC_FSGROWFSLOG: {
2137 struct xfs_growfs_log in;
2138
2139 if (copy_from_user(&in, arg, sizeof(in)))
2140 return -EFAULT;
2141
2142 error = mnt_want_write_file(filp);
2143 if (error)
2144 return error;
2145 error = xfs_growfs_log(mp, &in);
2146 mnt_drop_write_file(filp);
2147 return error;
2148 }
2149
2150 case XFS_IOC_FSGROWFSRT: {
2151 xfs_growfs_rt_t in;
2152
2153 if (copy_from_user(&in, arg, sizeof(in)))
2154 return -EFAULT;
2155
2156 error = mnt_want_write_file(filp);
2157 if (error)
2158 return error;
2159 error = xfs_growfs_rt(mp, &in);
2160 mnt_drop_write_file(filp);
2161 return error;
2162 }
2163
2164 case XFS_IOC_GOINGDOWN: {
2165 uint32_t in;
2166
2167 if (!capable(CAP_SYS_ADMIN))
2168 return -EPERM;
2169
2170 if (get_user(in, (uint32_t __user *)arg))
2171 return -EFAULT;
2172
2173 return xfs_fs_goingdown(mp, in);
2174 }
2175
2176 case XFS_IOC_ERROR_INJECTION: {
2177 xfs_error_injection_t in;
2178
2179 if (!capable(CAP_SYS_ADMIN))
2180 return -EPERM;
2181
2182 if (copy_from_user(&in, arg, sizeof(in)))
2183 return -EFAULT;
2184
2185 return xfs_errortag_add(mp, in.errtag);
2186 }
2187
2188 case XFS_IOC_ERROR_CLEARALL:
2189 if (!capable(CAP_SYS_ADMIN))
2190 return -EPERM;
2191
2192 return xfs_errortag_clearall(mp);
2193
2194 case XFS_IOC_FREE_EOFBLOCKS: {
2195 struct xfs_fs_eofblocks eofb;
2196 struct xfs_icwalk icw;
2197
2198 if (!capable(CAP_SYS_ADMIN))
2199 return -EPERM;
2200
2201 if (mp->m_flags & XFS_MOUNT_RDONLY)
2202 return -EROFS;
2203
2204 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2205 return -EFAULT;
2206
2207 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
2208 if (error)
2209 return error;
2210
2211 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
2212
2213 sb_start_write(mp->m_super);
2214 error = xfs_blockgc_free_space(mp, &icw);
2215 sb_end_write(mp->m_super);
2216 return error;
2217 }
2218
2219 default:
2220 return -ENOTTY;
2221 }
2222}