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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
44/*
45 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
46 * a file or fs handle.
47 *
48 * XFS_IOC_PATH_TO_FSHANDLE
49 * returns fs handle for a mount point or path within that mount point
50 * XFS_IOC_FD_TO_HANDLE
51 * returns full handle for a FD opened in user space
52 * XFS_IOC_PATH_TO_HANDLE
53 * returns full handle for a path
54 */
55int
56xfs_find_handle(
57 unsigned int cmd,
58 xfs_fsop_handlereq_t *hreq)
59{
60 int hsize;
61 xfs_handle_t handle;
62 struct inode *inode;
63 struct fd f = {NULL};
64 struct path path;
65 int error;
66 struct xfs_inode *ip;
67
68 if (cmd == XFS_IOC_FD_TO_HANDLE) {
69 f = fdget(hreq->fd);
70 if (!f.file)
71 return -EBADF;
72 inode = file_inode(f.file);
73 } else {
74 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
75 if (error)
76 return error;
77 inode = d_inode(path.dentry);
78 }
79 ip = XFS_I(inode);
80
81 /*
82 * We can only generate handles for inodes residing on a XFS filesystem,
83 * and only for regular files, directories or symbolic links.
84 */
85 error = -EINVAL;
86 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
87 goto out_put;
88
89 error = -EBADF;
90 if (!S_ISREG(inode->i_mode) &&
91 !S_ISDIR(inode->i_mode) &&
92 !S_ISLNK(inode->i_mode))
93 goto out_put;
94
95
96 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
97
98 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
99 /*
100 * This handle only contains an fsid, zero the rest.
101 */
102 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
103 hsize = sizeof(xfs_fsid_t);
104 } else {
105 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
106 sizeof(handle.ha_fid.fid_len);
107 handle.ha_fid.fid_pad = 0;
108 handle.ha_fid.fid_gen = inode->i_generation;
109 handle.ha_fid.fid_ino = ip->i_ino;
110 hsize = sizeof(xfs_handle_t);
111 }
112
113 error = -EFAULT;
114 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
115 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
116 goto out_put;
117
118 error = 0;
119
120 out_put:
121 if (cmd == XFS_IOC_FD_TO_HANDLE)
122 fdput(f);
123 else
124 path_put(&path);
125 return error;
126}
127
128/*
129 * No need to do permission checks on the various pathname components
130 * as the handle operations are privileged.
131 */
132STATIC int
133xfs_handle_acceptable(
134 void *context,
135 struct dentry *dentry)
136{
137 return 1;
138}
139
140/*
141 * Convert userspace handle data into a dentry.
142 */
143struct dentry *
144xfs_handle_to_dentry(
145 struct file *parfilp,
146 void __user *uhandle,
147 u32 hlen)
148{
149 xfs_handle_t handle;
150 struct xfs_fid64 fid;
151
152 /*
153 * Only allow handle opens under a directory.
154 */
155 if (!S_ISDIR(file_inode(parfilp)->i_mode))
156 return ERR_PTR(-ENOTDIR);
157
158 if (hlen != sizeof(xfs_handle_t))
159 return ERR_PTR(-EINVAL);
160 if (copy_from_user(&handle, uhandle, hlen))
161 return ERR_PTR(-EFAULT);
162 if (handle.ha_fid.fid_len !=
163 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
164 return ERR_PTR(-EINVAL);
165
166 memset(&fid, 0, sizeof(struct fid));
167 fid.ino = handle.ha_fid.fid_ino;
168 fid.gen = handle.ha_fid.fid_gen;
169
170 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
171 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
172 xfs_handle_acceptable, NULL);
173}
174
175STATIC struct dentry *
176xfs_handlereq_to_dentry(
177 struct file *parfilp,
178 xfs_fsop_handlereq_t *hreq)
179{
180 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
181}
182
183int
184xfs_open_by_handle(
185 struct file *parfilp,
186 xfs_fsop_handlereq_t *hreq)
187{
188 const struct cred *cred = current_cred();
189 int error;
190 int fd;
191 int permflag;
192 struct file *filp;
193 struct inode *inode;
194 struct dentry *dentry;
195 fmode_t fmode;
196 struct path path;
197
198 if (!capable(CAP_SYS_ADMIN))
199 return -EPERM;
200
201 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
202 if (IS_ERR(dentry))
203 return PTR_ERR(dentry);
204 inode = d_inode(dentry);
205
206 /* Restrict xfs_open_by_handle to directories & regular files. */
207 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
208 error = -EPERM;
209 goto out_dput;
210 }
211
212#if BITS_PER_LONG != 32
213 hreq->oflags |= O_LARGEFILE;
214#endif
215
216 permflag = hreq->oflags;
217 fmode = OPEN_FMODE(permflag);
218 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
219 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
220 error = -EPERM;
221 goto out_dput;
222 }
223
224 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
225 error = -EPERM;
226 goto out_dput;
227 }
228
229 /* Can't write directories. */
230 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
231 error = -EISDIR;
232 goto out_dput;
233 }
234
235 fd = get_unused_fd_flags(0);
236 if (fd < 0) {
237 error = fd;
238 goto out_dput;
239 }
240
241 path.mnt = parfilp->f_path.mnt;
242 path.dentry = dentry;
243 filp = dentry_open(&path, hreq->oflags, cred);
244 dput(dentry);
245 if (IS_ERR(filp)) {
246 put_unused_fd(fd);
247 return PTR_ERR(filp);
248 }
249
250 if (S_ISREG(inode->i_mode)) {
251 filp->f_flags |= O_NOATIME;
252 filp->f_mode |= FMODE_NOCMTIME;
253 }
254
255 fd_install(fd, filp);
256 return fd;
257
258 out_dput:
259 dput(dentry);
260 return error;
261}
262
263int
264xfs_readlink_by_handle(
265 struct file *parfilp,
266 xfs_fsop_handlereq_t *hreq)
267{
268 struct dentry *dentry;
269 __u32 olen;
270 int error;
271
272 if (!capable(CAP_SYS_ADMIN))
273 return -EPERM;
274
275 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
276 if (IS_ERR(dentry))
277 return PTR_ERR(dentry);
278
279 /* Restrict this handle operation to symlinks only. */
280 if (!d_is_symlink(dentry)) {
281 error = -EINVAL;
282 goto out_dput;
283 }
284
285 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
286 error = -EFAULT;
287 goto out_dput;
288 }
289
290 error = vfs_readlink(dentry, hreq->ohandle, olen);
291
292 out_dput:
293 dput(dentry);
294 return error;
295}
296
297/*
298 * Format an attribute and copy it out to the user's buffer.
299 * Take care to check values and protect against them changing later,
300 * we may be reading them directly out of a user buffer.
301 */
302static void
303xfs_ioc_attr_put_listent(
304 struct xfs_attr_list_context *context,
305 int flags,
306 unsigned char *name,
307 int namelen,
308 int valuelen)
309{
310 struct xfs_attrlist *alist = context->buffer;
311 struct xfs_attrlist_ent *aep;
312 int arraytop;
313
314 ASSERT(!context->seen_enough);
315 ASSERT(context->count >= 0);
316 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
317 ASSERT(context->firstu >= sizeof(*alist));
318 ASSERT(context->firstu <= context->bufsize);
319
320 /*
321 * Only list entries in the right namespace.
322 */
323 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
324 return;
325
326 arraytop = sizeof(*alist) +
327 context->count * sizeof(alist->al_offset[0]);
328
329 /* decrement by the actual bytes used by the attr */
330 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
331 namelen + 1, sizeof(uint32_t));
332 if (context->firstu < arraytop) {
333 trace_xfs_attr_list_full(context);
334 alist->al_more = 1;
335 context->seen_enough = 1;
336 return;
337 }
338
339 aep = context->buffer + context->firstu;
340 aep->a_valuelen = valuelen;
341 memcpy(aep->a_name, name, namelen);
342 aep->a_name[namelen] = 0;
343 alist->al_offset[context->count++] = context->firstu;
344 alist->al_count = context->count;
345 trace_xfs_attr_list_add(context);
346}
347
348static unsigned int
349xfs_attr_filter(
350 u32 ioc_flags)
351{
352 if (ioc_flags & XFS_IOC_ATTR_ROOT)
353 return XFS_ATTR_ROOT;
354 if (ioc_flags & XFS_IOC_ATTR_SECURE)
355 return XFS_ATTR_SECURE;
356 return 0;
357}
358
359static unsigned int
360xfs_attr_flags(
361 u32 ioc_flags)
362{
363 if (ioc_flags & XFS_IOC_ATTR_CREATE)
364 return XATTR_CREATE;
365 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
366 return XATTR_REPLACE;
367 return 0;
368}
369
370int
371xfs_ioc_attr_list(
372 struct xfs_inode *dp,
373 void __user *ubuf,
374 int bufsize,
375 int flags,
376 struct xfs_attrlist_cursor __user *ucursor)
377{
378 struct xfs_attr_list_context context = { };
379 struct xfs_attrlist *alist;
380 void *buffer;
381 int error;
382
383 if (bufsize < sizeof(struct xfs_attrlist) ||
384 bufsize > XFS_XATTR_LIST_MAX)
385 return -EINVAL;
386
387 /*
388 * Reject flags, only allow namespaces.
389 */
390 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
391 return -EINVAL;
392 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
393 return -EINVAL;
394
395 /*
396 * Validate the cursor.
397 */
398 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
399 return -EFAULT;
400 if (context.cursor.pad1 || context.cursor.pad2)
401 return -EINVAL;
402 if (!context.cursor.initted &&
403 (context.cursor.hashval || context.cursor.blkno ||
404 context.cursor.offset))
405 return -EINVAL;
406
407 buffer = kmem_zalloc_large(bufsize, 0);
408 if (!buffer)
409 return -ENOMEM;
410
411 /*
412 * Initialize the output buffer.
413 */
414 context.dp = dp;
415 context.resynch = 1;
416 context.attr_filter = xfs_attr_filter(flags);
417 context.buffer = buffer;
418 context.bufsize = round_down(bufsize, sizeof(uint32_t));
419 context.firstu = context.bufsize;
420 context.put_listent = xfs_ioc_attr_put_listent;
421
422 alist = context.buffer;
423 alist->al_count = 0;
424 alist->al_more = 0;
425 alist->al_offset[0] = context.bufsize;
426
427 error = xfs_attr_list(&context);
428 if (error)
429 goto out_free;
430
431 if (copy_to_user(ubuf, buffer, bufsize) ||
432 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
433 error = -EFAULT;
434out_free:
435 kmem_free(buffer);
436 return error;
437}
438
439STATIC int
440xfs_attrlist_by_handle(
441 struct file *parfilp,
442 struct xfs_fsop_attrlist_handlereq __user *p)
443{
444 struct xfs_fsop_attrlist_handlereq al_hreq;
445 struct dentry *dentry;
446 int error = -ENOMEM;
447
448 if (!capable(CAP_SYS_ADMIN))
449 return -EPERM;
450 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
451 return -EFAULT;
452
453 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
454 if (IS_ERR(dentry))
455 return PTR_ERR(dentry);
456
457 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
458 al_hreq.buflen, al_hreq.flags, &p->pos);
459 dput(dentry);
460 return error;
461}
462
463static int
464xfs_attrmulti_attr_get(
465 struct inode *inode,
466 unsigned char *name,
467 unsigned char __user *ubuf,
468 uint32_t *len,
469 uint32_t flags)
470{
471 struct xfs_da_args args = {
472 .dp = XFS_I(inode),
473 .attr_filter = xfs_attr_filter(flags),
474 .attr_flags = xfs_attr_flags(flags),
475 .name = name,
476 .namelen = strlen(name),
477 .valuelen = *len,
478 };
479 int error;
480
481 if (*len > XFS_XATTR_SIZE_MAX)
482 return -EINVAL;
483
484 error = xfs_attr_get(&args);
485 if (error)
486 goto out_kfree;
487
488 *len = args.valuelen;
489 if (copy_to_user(ubuf, args.value, args.valuelen))
490 error = -EFAULT;
491
492out_kfree:
493 kmem_free(args.value);
494 return error;
495}
496
497static int
498xfs_attrmulti_attr_set(
499 struct inode *inode,
500 unsigned char *name,
501 const unsigned char __user *ubuf,
502 uint32_t len,
503 uint32_t flags)
504{
505 struct xfs_da_args args = {
506 .dp = XFS_I(inode),
507 .attr_filter = xfs_attr_filter(flags),
508 .attr_flags = xfs_attr_flags(flags),
509 .name = name,
510 .namelen = strlen(name),
511 };
512 int error;
513
514 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
515 return -EPERM;
516
517 if (ubuf) {
518 if (len > XFS_XATTR_SIZE_MAX)
519 return -EINVAL;
520 args.value = memdup_user(ubuf, len);
521 if (IS_ERR(args.value))
522 return PTR_ERR(args.value);
523 args.valuelen = len;
524 }
525
526 error = xfs_attr_set(&args);
527 if (!error && (flags & XFS_IOC_ATTR_ROOT))
528 xfs_forget_acl(inode, name);
529 kfree(args.value);
530 return error;
531}
532
533int
534xfs_ioc_attrmulti_one(
535 struct file *parfilp,
536 struct inode *inode,
537 uint32_t opcode,
538 void __user *uname,
539 void __user *value,
540 uint32_t *len,
541 uint32_t flags)
542{
543 unsigned char *name;
544 int error;
545
546 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
547 return -EINVAL;
548
549 name = strndup_user(uname, MAXNAMELEN);
550 if (IS_ERR(name))
551 return PTR_ERR(name);
552
553 switch (opcode) {
554 case ATTR_OP_GET:
555 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
556 break;
557 case ATTR_OP_REMOVE:
558 value = NULL;
559 *len = 0;
560 /* fall through */
561 case ATTR_OP_SET:
562 error = mnt_want_write_file(parfilp);
563 if (error)
564 break;
565 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
566 mnt_drop_write_file(parfilp);
567 break;
568 default:
569 error = -EINVAL;
570 break;
571 }
572
573 kfree(name);
574 return error;
575}
576
577STATIC int
578xfs_attrmulti_by_handle(
579 struct file *parfilp,
580 void __user *arg)
581{
582 int error;
583 xfs_attr_multiop_t *ops;
584 xfs_fsop_attrmulti_handlereq_t am_hreq;
585 struct dentry *dentry;
586 unsigned int i, size;
587
588 if (!capable(CAP_SYS_ADMIN))
589 return -EPERM;
590 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
591 return -EFAULT;
592
593 /* overflow check */
594 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
595 return -E2BIG;
596
597 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
598 if (IS_ERR(dentry))
599 return PTR_ERR(dentry);
600
601 error = -E2BIG;
602 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
603 if (!size || size > 16 * PAGE_SIZE)
604 goto out_dput;
605
606 ops = memdup_user(am_hreq.ops, size);
607 if (IS_ERR(ops)) {
608 error = PTR_ERR(ops);
609 goto out_dput;
610 }
611
612 error = 0;
613 for (i = 0; i < am_hreq.opcount; i++) {
614 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
615 d_inode(dentry), ops[i].am_opcode,
616 ops[i].am_attrname, ops[i].am_attrvalue,
617 &ops[i].am_length, ops[i].am_flags);
618 }
619
620 if (copy_to_user(am_hreq.ops, ops, size))
621 error = -EFAULT;
622
623 kfree(ops);
624 out_dput:
625 dput(dentry);
626 return error;
627}
628
629int
630xfs_ioc_space(
631 struct file *filp,
632 xfs_flock64_t *bf)
633{
634 struct inode *inode = file_inode(filp);
635 struct xfs_inode *ip = XFS_I(inode);
636 struct iattr iattr;
637 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR;
638 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
639 int error;
640
641 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
642 return -EPERM;
643
644 if (!(filp->f_mode & FMODE_WRITE))
645 return -EBADF;
646
647 if (!S_ISREG(inode->i_mode))
648 return -EINVAL;
649
650 if (xfs_is_always_cow_inode(ip))
651 return -EOPNOTSUPP;
652
653 if (filp->f_flags & O_DSYNC)
654 flags |= XFS_PREALLOC_SYNC;
655 if (filp->f_mode & FMODE_NOCMTIME)
656 flags |= XFS_PREALLOC_INVISIBLE;
657
658 error = mnt_want_write_file(filp);
659 if (error)
660 return error;
661
662 xfs_ilock(ip, iolock);
663 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
664 if (error)
665 goto out_unlock;
666 inode_dio_wait(inode);
667
668 switch (bf->l_whence) {
669 case 0: /*SEEK_SET*/
670 break;
671 case 1: /*SEEK_CUR*/
672 bf->l_start += filp->f_pos;
673 break;
674 case 2: /*SEEK_END*/
675 bf->l_start += XFS_ISIZE(ip);
676 break;
677 default:
678 error = -EINVAL;
679 goto out_unlock;
680 }
681
682 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) {
683 error = -EINVAL;
684 goto out_unlock;
685 }
686
687 if (bf->l_start > XFS_ISIZE(ip)) {
688 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
689 bf->l_start - XFS_ISIZE(ip), 0);
690 if (error)
691 goto out_unlock;
692 }
693
694 iattr.ia_valid = ATTR_SIZE;
695 iattr.ia_size = bf->l_start;
696 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
697 if (error)
698 goto out_unlock;
699
700 error = xfs_update_prealloc_flags(ip, flags);
701
702out_unlock:
703 xfs_iunlock(ip, iolock);
704 mnt_drop_write_file(filp);
705 return error;
706}
707
708/* Return 0 on success or positive error */
709int
710xfs_fsbulkstat_one_fmt(
711 struct xfs_ibulk *breq,
712 const struct xfs_bulkstat *bstat)
713{
714 struct xfs_bstat bs1;
715
716 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
717 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
718 return -EFAULT;
719 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
720}
721
722int
723xfs_fsinumbers_fmt(
724 struct xfs_ibulk *breq,
725 const struct xfs_inumbers *igrp)
726{
727 struct xfs_inogrp ig1;
728
729 xfs_inumbers_to_inogrp(&ig1, igrp);
730 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
731 return -EFAULT;
732 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
733}
734
735STATIC int
736xfs_ioc_fsbulkstat(
737 xfs_mount_t *mp,
738 unsigned int cmd,
739 void __user *arg)
740{
741 struct xfs_fsop_bulkreq bulkreq;
742 struct xfs_ibulk breq = {
743 .mp = mp,
744 .ocount = 0,
745 };
746 xfs_ino_t lastino;
747 int error;
748
749 /* done = 1 if there are more stats to get and if bulkstat */
750 /* should be called again (unused here, but used in dmapi) */
751
752 if (!capable(CAP_SYS_ADMIN))
753 return -EPERM;
754
755 if (XFS_FORCED_SHUTDOWN(mp))
756 return -EIO;
757
758 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
759 return -EFAULT;
760
761 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
762 return -EFAULT;
763
764 if (bulkreq.icount <= 0)
765 return -EINVAL;
766
767 if (bulkreq.ubuffer == NULL)
768 return -EINVAL;
769
770 breq.ubuffer = bulkreq.ubuffer;
771 breq.icount = bulkreq.icount;
772
773 /*
774 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
775 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
776 * that *lastip contains either zero or the number of the last inode to
777 * be examined by the previous call and return results starting with
778 * the next inode after that. The new bulk request back end functions
779 * take the inode to start with, so we have to compute the startino
780 * parameter from lastino to maintain correct function. lastino == 0
781 * is a special case because it has traditionally meant "first inode
782 * in filesystem".
783 */
784 if (cmd == XFS_IOC_FSINUMBERS) {
785 breq.startino = lastino ? lastino + 1 : 0;
786 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
787 lastino = breq.startino - 1;
788 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
789 breq.startino = lastino;
790 breq.icount = 1;
791 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
792 } else { /* XFS_IOC_FSBULKSTAT */
793 breq.startino = lastino ? lastino + 1 : 0;
794 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
795 lastino = breq.startino - 1;
796 }
797
798 if (error)
799 return error;
800
801 if (bulkreq.lastip != NULL &&
802 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
803 return -EFAULT;
804
805 if (bulkreq.ocount != NULL &&
806 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
807 return -EFAULT;
808
809 return 0;
810}
811
812/* Return 0 on success or positive error */
813static int
814xfs_bulkstat_fmt(
815 struct xfs_ibulk *breq,
816 const struct xfs_bulkstat *bstat)
817{
818 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
819 return -EFAULT;
820 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
821}
822
823/*
824 * Check the incoming bulk request @hdr from userspace and initialize the
825 * internal @breq bulk request appropriately. Returns 0 if the bulk request
826 * should proceed; -ECANCELED if there's nothing to do; or the usual
827 * negative error code.
828 */
829static int
830xfs_bulk_ireq_setup(
831 struct xfs_mount *mp,
832 struct xfs_bulk_ireq *hdr,
833 struct xfs_ibulk *breq,
834 void __user *ubuffer)
835{
836 if (hdr->icount == 0 ||
837 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
838 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
839 return -EINVAL;
840
841 breq->startino = hdr->ino;
842 breq->ubuffer = ubuffer;
843 breq->icount = hdr->icount;
844 breq->ocount = 0;
845 breq->flags = 0;
846
847 /*
848 * The @ino parameter is a special value, so we must look it up here.
849 * We're not allowed to have IREQ_AGNO, and we only return one inode
850 * worth of data.
851 */
852 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
853 if (hdr->flags & XFS_BULK_IREQ_AGNO)
854 return -EINVAL;
855
856 switch (hdr->ino) {
857 case XFS_BULK_IREQ_SPECIAL_ROOT:
858 hdr->ino = mp->m_sb.sb_rootino;
859 break;
860 default:
861 return -EINVAL;
862 }
863 breq->icount = 1;
864 }
865
866 /*
867 * The IREQ_AGNO flag means that we only want results from a given AG.
868 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
869 * beyond the specified AG then we return no results.
870 */
871 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
872 if (hdr->agno >= mp->m_sb.sb_agcount)
873 return -EINVAL;
874
875 if (breq->startino == 0)
876 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
877 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
878 return -EINVAL;
879
880 breq->flags |= XFS_IBULK_SAME_AG;
881
882 /* Asking for an inode past the end of the AG? We're done! */
883 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
884 return -ECANCELED;
885 } else if (hdr->agno)
886 return -EINVAL;
887
888 /* Asking for an inode past the end of the FS? We're done! */
889 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
890 return -ECANCELED;
891
892 return 0;
893}
894
895/*
896 * Update the userspace bulk request @hdr to reflect the end state of the
897 * internal bulk request @breq.
898 */
899static void
900xfs_bulk_ireq_teardown(
901 struct xfs_bulk_ireq *hdr,
902 struct xfs_ibulk *breq)
903{
904 hdr->ino = breq->startino;
905 hdr->ocount = breq->ocount;
906}
907
908/* Handle the v5 bulkstat ioctl. */
909STATIC int
910xfs_ioc_bulkstat(
911 struct xfs_mount *mp,
912 unsigned int cmd,
913 struct xfs_bulkstat_req __user *arg)
914{
915 struct xfs_bulk_ireq hdr;
916 struct xfs_ibulk breq = {
917 .mp = mp,
918 };
919 int error;
920
921 if (!capable(CAP_SYS_ADMIN))
922 return -EPERM;
923
924 if (XFS_FORCED_SHUTDOWN(mp))
925 return -EIO;
926
927 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
928 return -EFAULT;
929
930 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
931 if (error == -ECANCELED)
932 goto out_teardown;
933 if (error < 0)
934 return error;
935
936 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
937 if (error)
938 return error;
939
940out_teardown:
941 xfs_bulk_ireq_teardown(&hdr, &breq);
942 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
943 return -EFAULT;
944
945 return 0;
946}
947
948STATIC int
949xfs_inumbers_fmt(
950 struct xfs_ibulk *breq,
951 const struct xfs_inumbers *igrp)
952{
953 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
954 return -EFAULT;
955 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
956}
957
958/* Handle the v5 inumbers ioctl. */
959STATIC int
960xfs_ioc_inumbers(
961 struct xfs_mount *mp,
962 unsigned int cmd,
963 struct xfs_inumbers_req __user *arg)
964{
965 struct xfs_bulk_ireq hdr;
966 struct xfs_ibulk breq = {
967 .mp = mp,
968 };
969 int error;
970
971 if (!capable(CAP_SYS_ADMIN))
972 return -EPERM;
973
974 if (XFS_FORCED_SHUTDOWN(mp))
975 return -EIO;
976
977 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
978 return -EFAULT;
979
980 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
981 if (error == -ECANCELED)
982 goto out_teardown;
983 if (error < 0)
984 return error;
985
986 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
987 if (error)
988 return error;
989
990out_teardown:
991 xfs_bulk_ireq_teardown(&hdr, &breq);
992 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
993 return -EFAULT;
994
995 return 0;
996}
997
998STATIC int
999xfs_ioc_fsgeometry(
1000 struct xfs_mount *mp,
1001 void __user *arg,
1002 int struct_version)
1003{
1004 struct xfs_fsop_geom fsgeo;
1005 size_t len;
1006
1007 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version);
1008
1009 if (struct_version <= 3)
1010 len = sizeof(struct xfs_fsop_geom_v1);
1011 else if (struct_version == 4)
1012 len = sizeof(struct xfs_fsop_geom_v4);
1013 else {
1014 xfs_fsop_geom_health(mp, &fsgeo);
1015 len = sizeof(fsgeo);
1016 }
1017
1018 if (copy_to_user(arg, &fsgeo, len))
1019 return -EFAULT;
1020 return 0;
1021}
1022
1023STATIC int
1024xfs_ioc_ag_geometry(
1025 struct xfs_mount *mp,
1026 void __user *arg)
1027{
1028 struct xfs_ag_geometry ageo;
1029 int error;
1030
1031 if (copy_from_user(&ageo, arg, sizeof(ageo)))
1032 return -EFAULT;
1033 if (ageo.ag_flags)
1034 return -EINVAL;
1035 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
1036 return -EINVAL;
1037
1038 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1039 if (error)
1040 return error;
1041
1042 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1043 return -EFAULT;
1044 return 0;
1045}
1046
1047/*
1048 * Linux extended inode flags interface.
1049 */
1050
1051STATIC unsigned int
1052xfs_merge_ioc_xflags(
1053 unsigned int flags,
1054 unsigned int start)
1055{
1056 unsigned int xflags = start;
1057
1058 if (flags & FS_IMMUTABLE_FL)
1059 xflags |= FS_XFLAG_IMMUTABLE;
1060 else
1061 xflags &= ~FS_XFLAG_IMMUTABLE;
1062 if (flags & FS_APPEND_FL)
1063 xflags |= FS_XFLAG_APPEND;
1064 else
1065 xflags &= ~FS_XFLAG_APPEND;
1066 if (flags & FS_SYNC_FL)
1067 xflags |= FS_XFLAG_SYNC;
1068 else
1069 xflags &= ~FS_XFLAG_SYNC;
1070 if (flags & FS_NOATIME_FL)
1071 xflags |= FS_XFLAG_NOATIME;
1072 else
1073 xflags &= ~FS_XFLAG_NOATIME;
1074 if (flags & FS_NODUMP_FL)
1075 xflags |= FS_XFLAG_NODUMP;
1076 else
1077 xflags &= ~FS_XFLAG_NODUMP;
1078 if (flags & FS_DAX_FL)
1079 xflags |= FS_XFLAG_DAX;
1080 else
1081 xflags &= ~FS_XFLAG_DAX;
1082
1083 return xflags;
1084}
1085
1086STATIC unsigned int
1087xfs_di2lxflags(
1088 uint16_t di_flags,
1089 uint64_t di_flags2)
1090{
1091 unsigned int flags = 0;
1092
1093 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1094 flags |= FS_IMMUTABLE_FL;
1095 if (di_flags & XFS_DIFLAG_APPEND)
1096 flags |= FS_APPEND_FL;
1097 if (di_flags & XFS_DIFLAG_SYNC)
1098 flags |= FS_SYNC_FL;
1099 if (di_flags & XFS_DIFLAG_NOATIME)
1100 flags |= FS_NOATIME_FL;
1101 if (di_flags & XFS_DIFLAG_NODUMP)
1102 flags |= FS_NODUMP_FL;
1103 if (di_flags2 & XFS_DIFLAG2_DAX) {
1104 flags |= FS_DAX_FL;
1105 }
1106 return flags;
1107}
1108
1109static void
1110xfs_fill_fsxattr(
1111 struct xfs_inode *ip,
1112 bool attr,
1113 struct fsxattr *fa)
1114{
1115 struct xfs_ifork *ifp = attr ? ip->i_afp : &ip->i_df;
1116
1117 simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
1118 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
1119 fa->fsx_cowextsize = ip->i_d.di_cowextsize <<
1120 ip->i_mount->m_sb.sb_blocklog;
1121 fa->fsx_projid = ip->i_d.di_projid;
1122 if (ifp && (ifp->if_flags & XFS_IFEXTENTS))
1123 fa->fsx_nextents = xfs_iext_count(ifp);
1124 else
1125 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1126}
1127
1128STATIC int
1129xfs_ioc_fsgetxattr(
1130 xfs_inode_t *ip,
1131 int attr,
1132 void __user *arg)
1133{
1134 struct fsxattr fa;
1135
1136 xfs_ilock(ip, XFS_ILOCK_SHARED);
1137 xfs_fill_fsxattr(ip, attr, &fa);
1138 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1139
1140 if (copy_to_user(arg, &fa, sizeof(fa)))
1141 return -EFAULT;
1142 return 0;
1143}
1144
1145STATIC uint16_t
1146xfs_flags2diflags(
1147 struct xfs_inode *ip,
1148 unsigned int xflags)
1149{
1150 /* can't set PREALLOC this way, just preserve it */
1151 uint16_t di_flags =
1152 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
1153
1154 if (xflags & FS_XFLAG_IMMUTABLE)
1155 di_flags |= XFS_DIFLAG_IMMUTABLE;
1156 if (xflags & FS_XFLAG_APPEND)
1157 di_flags |= XFS_DIFLAG_APPEND;
1158 if (xflags & FS_XFLAG_SYNC)
1159 di_flags |= XFS_DIFLAG_SYNC;
1160 if (xflags & FS_XFLAG_NOATIME)
1161 di_flags |= XFS_DIFLAG_NOATIME;
1162 if (xflags & FS_XFLAG_NODUMP)
1163 di_flags |= XFS_DIFLAG_NODUMP;
1164 if (xflags & FS_XFLAG_NODEFRAG)
1165 di_flags |= XFS_DIFLAG_NODEFRAG;
1166 if (xflags & FS_XFLAG_FILESTREAM)
1167 di_flags |= XFS_DIFLAG_FILESTREAM;
1168 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1169 if (xflags & FS_XFLAG_RTINHERIT)
1170 di_flags |= XFS_DIFLAG_RTINHERIT;
1171 if (xflags & FS_XFLAG_NOSYMLINKS)
1172 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1173 if (xflags & FS_XFLAG_EXTSZINHERIT)
1174 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1175 if (xflags & FS_XFLAG_PROJINHERIT)
1176 di_flags |= XFS_DIFLAG_PROJINHERIT;
1177 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1178 if (xflags & FS_XFLAG_REALTIME)
1179 di_flags |= XFS_DIFLAG_REALTIME;
1180 if (xflags & FS_XFLAG_EXTSIZE)
1181 di_flags |= XFS_DIFLAG_EXTSIZE;
1182 }
1183
1184 return di_flags;
1185}
1186
1187STATIC uint64_t
1188xfs_flags2diflags2(
1189 struct xfs_inode *ip,
1190 unsigned int xflags)
1191{
1192 uint64_t di_flags2 =
1193 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
1194
1195 if (xflags & FS_XFLAG_DAX)
1196 di_flags2 |= XFS_DIFLAG2_DAX;
1197 if (xflags & FS_XFLAG_COWEXTSIZE)
1198 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1199
1200 return di_flags2;
1201}
1202
1203static int
1204xfs_ioctl_setattr_xflags(
1205 struct xfs_trans *tp,
1206 struct xfs_inode *ip,
1207 struct fsxattr *fa)
1208{
1209 struct xfs_mount *mp = ip->i_mount;
1210 uint64_t di_flags2;
1211
1212 /* Can't change realtime flag if any extents are allocated. */
1213 if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
1214 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1215 return -EINVAL;
1216
1217 /* If realtime flag is set then must have realtime device */
1218 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1219 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1220 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1221 return -EINVAL;
1222 }
1223
1224 /* Clear reflink if we are actually able to set the rt flag. */
1225 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1226 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1227
1228 /* Don't allow us to set DAX mode for a reflinked file for now. */
1229 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1230 return -EINVAL;
1231
1232 /* diflags2 only valid for v3 inodes. */
1233 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1234 if (di_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb))
1235 return -EINVAL;
1236
1237 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1238 ip->i_d.di_flags2 = di_flags2;
1239
1240 xfs_diflags_to_iflags(ip, false);
1241 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1242 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1243 XFS_STATS_INC(mp, xs_ig_attrchg);
1244 return 0;
1245}
1246
1247static void
1248xfs_ioctl_setattr_prepare_dax(
1249 struct xfs_inode *ip,
1250 struct fsxattr *fa)
1251{
1252 struct xfs_mount *mp = ip->i_mount;
1253 struct inode *inode = VFS_I(ip);
1254
1255 if (S_ISDIR(inode->i_mode))
1256 return;
1257
1258 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) ||
1259 (mp->m_flags & XFS_MOUNT_DAX_NEVER))
1260 return;
1261
1262 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1263 !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) ||
1264 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1265 (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)))
1266 d_mark_dontcache(inode);
1267}
1268
1269/*
1270 * Set up the transaction structure for the setattr operation, checking that we
1271 * have permission to do so. On success, return a clean transaction and the
1272 * inode locked exclusively ready for further operation specific checks. On
1273 * failure, return an error without modifying or locking the inode.
1274 */
1275static struct xfs_trans *
1276xfs_ioctl_setattr_get_trans(
1277 struct xfs_inode *ip)
1278{
1279 struct xfs_mount *mp = ip->i_mount;
1280 struct xfs_trans *tp;
1281 int error = -EROFS;
1282
1283 if (mp->m_flags & XFS_MOUNT_RDONLY)
1284 goto out_unlock;
1285 error = -EIO;
1286 if (XFS_FORCED_SHUTDOWN(mp))
1287 goto out_unlock;
1288
1289 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1290 if (error)
1291 goto out_unlock;
1292
1293 xfs_ilock(ip, XFS_ILOCK_EXCL);
1294 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1295
1296 /*
1297 * CAP_FOWNER overrides the following restrictions:
1298 *
1299 * The user ID of the calling process must be equal to the file owner
1300 * ID, except in cases where the CAP_FSETID capability is applicable.
1301 */
1302 if (!inode_owner_or_capable(VFS_I(ip))) {
1303 error = -EPERM;
1304 goto out_cancel;
1305 }
1306
1307 if (mp->m_flags & XFS_MOUNT_WSYNC)
1308 xfs_trans_set_sync(tp);
1309
1310 return tp;
1311
1312out_cancel:
1313 xfs_trans_cancel(tp);
1314out_unlock:
1315 return ERR_PTR(error);
1316}
1317
1318/*
1319 * extent size hint validation is somewhat cumbersome. Rules are:
1320 *
1321 * 1. extent size hint is only valid for directories and regular files
1322 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1323 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1324 * 4. can only be changed on regular files if no extents are allocated
1325 * 5. can be changed on directories at any time
1326 * 6. extsize hint of 0 turns off hints, clears inode flags.
1327 * 7. Extent size must be a multiple of the appropriate block size.
1328 * 8. for non-realtime files, the extent size hint must be limited
1329 * to half the AG size to avoid alignment extending the extent beyond the
1330 * limits of the AG.
1331 *
1332 * Please keep this function in sync with xfs_scrub_inode_extsize.
1333 */
1334static int
1335xfs_ioctl_setattr_check_extsize(
1336 struct xfs_inode *ip,
1337 struct fsxattr *fa)
1338{
1339 struct xfs_mount *mp = ip->i_mount;
1340 xfs_extlen_t size;
1341 xfs_fsblock_t extsize_fsb;
1342
1343 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1344 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1345 return -EINVAL;
1346
1347 if (fa->fsx_extsize == 0)
1348 return 0;
1349
1350 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1351 if (extsize_fsb > MAXEXTLEN)
1352 return -EINVAL;
1353
1354 if (XFS_IS_REALTIME_INODE(ip) ||
1355 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1356 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1357 } else {
1358 size = mp->m_sb.sb_blocksize;
1359 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1360 return -EINVAL;
1361 }
1362
1363 if (fa->fsx_extsize % size)
1364 return -EINVAL;
1365
1366 return 0;
1367}
1368
1369/*
1370 * CoW extent size hint validation rules are:
1371 *
1372 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1373 * The inode does not have to have any shared blocks, but it must be a v3.
1374 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1375 * for a directory, the hint is propagated to new files.
1376 * 3. Can be changed on files & directories at any time.
1377 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1378 * 5. Extent size must be a multiple of the appropriate block size.
1379 * 6. The extent size hint must be limited to half the AG size to avoid
1380 * alignment extending the extent beyond the limits of the AG.
1381 *
1382 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1383 */
1384static int
1385xfs_ioctl_setattr_check_cowextsize(
1386 struct xfs_inode *ip,
1387 struct fsxattr *fa)
1388{
1389 struct xfs_mount *mp = ip->i_mount;
1390 xfs_extlen_t size;
1391 xfs_fsblock_t cowextsize_fsb;
1392
1393 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1394 return 0;
1395
1396 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb))
1397 return -EINVAL;
1398
1399 if (fa->fsx_cowextsize == 0)
1400 return 0;
1401
1402 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1403 if (cowextsize_fsb > MAXEXTLEN)
1404 return -EINVAL;
1405
1406 size = mp->m_sb.sb_blocksize;
1407 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1408 return -EINVAL;
1409
1410 if (fa->fsx_cowextsize % size)
1411 return -EINVAL;
1412
1413 return 0;
1414}
1415
1416static int
1417xfs_ioctl_setattr_check_projid(
1418 struct xfs_inode *ip,
1419 struct fsxattr *fa)
1420{
1421 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1422 if (fa->fsx_projid > (uint16_t)-1 &&
1423 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1424 return -EINVAL;
1425 return 0;
1426}
1427
1428STATIC int
1429xfs_ioctl_setattr(
1430 xfs_inode_t *ip,
1431 struct fsxattr *fa)
1432{
1433 struct fsxattr old_fa;
1434 struct xfs_mount *mp = ip->i_mount;
1435 struct xfs_trans *tp;
1436 struct xfs_dquot *pdqp = NULL;
1437 struct xfs_dquot *olddquot = NULL;
1438 int code;
1439
1440 trace_xfs_ioctl_setattr(ip);
1441
1442 code = xfs_ioctl_setattr_check_projid(ip, fa);
1443 if (code)
1444 return code;
1445
1446 /*
1447 * If disk quotas is on, we make sure that the dquots do exist on disk,
1448 * before we start any other transactions. Trying to do this later
1449 * is messy. We don't care to take a readlock to look at the ids
1450 * in inode here, because we can't hold it across the trans_reserve.
1451 * If the IDs do change before we take the ilock, we're covered
1452 * because the i_*dquot fields will get updated anyway.
1453 */
1454 if (XFS_IS_QUOTA_ON(mp)) {
1455 code = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1456 VFS_I(ip)->i_gid, fa->fsx_projid,
1457 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1458 if (code)
1459 return code;
1460 }
1461
1462 xfs_ioctl_setattr_prepare_dax(ip, fa);
1463
1464 tp = xfs_ioctl_setattr_get_trans(ip);
1465 if (IS_ERR(tp)) {
1466 code = PTR_ERR(tp);
1467 goto error_free_dquots;
1468 }
1469
1470 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1471 ip->i_d.di_projid != fa->fsx_projid) {
1472 code = xfs_qm_vop_chown_reserve(tp, ip, NULL, NULL, pdqp,
1473 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1474 if (code) /* out of quota */
1475 goto error_trans_cancel;
1476 }
1477
1478 xfs_fill_fsxattr(ip, false, &old_fa);
1479 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa);
1480 if (code)
1481 goto error_trans_cancel;
1482
1483 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1484 if (code)
1485 goto error_trans_cancel;
1486
1487 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1488 if (code)
1489 goto error_trans_cancel;
1490
1491 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1492 if (code)
1493 goto error_trans_cancel;
1494
1495 /*
1496 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1497 * overrides the following restrictions:
1498 *
1499 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1500 * successful return from chown()
1501 */
1502
1503 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1504 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1505 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1506
1507 /* Change the ownerships and register project quota modifications */
1508 if (ip->i_d.di_projid != fa->fsx_projid) {
1509 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1510 olddquot = xfs_qm_vop_chown(tp, ip,
1511 &ip->i_pdquot, pdqp);
1512 }
1513 ip->i_d.di_projid = fa->fsx_projid;
1514 }
1515
1516 /*
1517 * Only set the extent size hint if we've already determined that the
1518 * extent size hint should be set on the inode. If no extent size flags
1519 * are set on the inode then unconditionally clear the extent size hint.
1520 */
1521 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1522 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1523 else
1524 ip->i_d.di_extsize = 0;
1525 if (xfs_sb_version_has_v3inode(&mp->m_sb) &&
1526 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1527 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1528 mp->m_sb.sb_blocklog;
1529 else
1530 ip->i_d.di_cowextsize = 0;
1531
1532 code = xfs_trans_commit(tp);
1533
1534 /*
1535 * Release any dquot(s) the inode had kept before chown.
1536 */
1537 xfs_qm_dqrele(olddquot);
1538 xfs_qm_dqrele(pdqp);
1539
1540 return code;
1541
1542error_trans_cancel:
1543 xfs_trans_cancel(tp);
1544error_free_dquots:
1545 xfs_qm_dqrele(pdqp);
1546 return code;
1547}
1548
1549STATIC int
1550xfs_ioc_fssetxattr(
1551 xfs_inode_t *ip,
1552 struct file *filp,
1553 void __user *arg)
1554{
1555 struct fsxattr fa;
1556 int error;
1557
1558 if (copy_from_user(&fa, arg, sizeof(fa)))
1559 return -EFAULT;
1560
1561 error = mnt_want_write_file(filp);
1562 if (error)
1563 return error;
1564 error = xfs_ioctl_setattr(ip, &fa);
1565 mnt_drop_write_file(filp);
1566 return error;
1567}
1568
1569STATIC int
1570xfs_ioc_getxflags(
1571 xfs_inode_t *ip,
1572 void __user *arg)
1573{
1574 unsigned int flags;
1575
1576 flags = xfs_di2lxflags(ip->i_d.di_flags, ip->i_d.di_flags2);
1577 if (copy_to_user(arg, &flags, sizeof(flags)))
1578 return -EFAULT;
1579 return 0;
1580}
1581
1582STATIC int
1583xfs_ioc_setxflags(
1584 struct xfs_inode *ip,
1585 struct file *filp,
1586 void __user *arg)
1587{
1588 struct xfs_trans *tp;
1589 struct fsxattr fa;
1590 struct fsxattr old_fa;
1591 unsigned int flags;
1592 int error;
1593
1594 if (copy_from_user(&flags, arg, sizeof(flags)))
1595 return -EFAULT;
1596
1597 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1598 FS_NOATIME_FL | FS_NODUMP_FL | \
1599 FS_SYNC_FL | FS_DAX_FL))
1600 return -EOPNOTSUPP;
1601
1602 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1603
1604 error = mnt_want_write_file(filp);
1605 if (error)
1606 return error;
1607
1608 xfs_ioctl_setattr_prepare_dax(ip, &fa);
1609
1610 tp = xfs_ioctl_setattr_get_trans(ip);
1611 if (IS_ERR(tp)) {
1612 error = PTR_ERR(tp);
1613 goto out_drop_write;
1614 }
1615
1616 xfs_fill_fsxattr(ip, false, &old_fa);
1617 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa);
1618 if (error) {
1619 xfs_trans_cancel(tp);
1620 goto out_drop_write;
1621 }
1622
1623 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1624 if (error) {
1625 xfs_trans_cancel(tp);
1626 goto out_drop_write;
1627 }
1628
1629 error = xfs_trans_commit(tp);
1630out_drop_write:
1631 mnt_drop_write_file(filp);
1632 return error;
1633}
1634
1635static bool
1636xfs_getbmap_format(
1637 struct kgetbmap *p,
1638 struct getbmapx __user *u,
1639 size_t recsize)
1640{
1641 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1642 put_user(p->bmv_block, &u->bmv_block) ||
1643 put_user(p->bmv_length, &u->bmv_length) ||
1644 put_user(0, &u->bmv_count) ||
1645 put_user(0, &u->bmv_entries))
1646 return false;
1647 if (recsize < sizeof(struct getbmapx))
1648 return true;
1649 if (put_user(0, &u->bmv_iflags) ||
1650 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1651 put_user(0, &u->bmv_unused1) ||
1652 put_user(0, &u->bmv_unused2))
1653 return false;
1654 return true;
1655}
1656
1657STATIC int
1658xfs_ioc_getbmap(
1659 struct file *file,
1660 unsigned int cmd,
1661 void __user *arg)
1662{
1663 struct getbmapx bmx = { 0 };
1664 struct kgetbmap *buf;
1665 size_t recsize;
1666 int error, i;
1667
1668 switch (cmd) {
1669 case XFS_IOC_GETBMAPA:
1670 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1671 /*FALLTHRU*/
1672 case XFS_IOC_GETBMAP:
1673 if (file->f_mode & FMODE_NOCMTIME)
1674 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1675 /* struct getbmap is a strict subset of struct getbmapx. */
1676 recsize = sizeof(struct getbmap);
1677 break;
1678 case XFS_IOC_GETBMAPX:
1679 recsize = sizeof(struct getbmapx);
1680 break;
1681 default:
1682 return -EINVAL;
1683 }
1684
1685 if (copy_from_user(&bmx, arg, recsize))
1686 return -EFAULT;
1687
1688 if (bmx.bmv_count < 2)
1689 return -EINVAL;
1690 if (bmx.bmv_count > ULONG_MAX / recsize)
1691 return -ENOMEM;
1692
1693 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1694 if (!buf)
1695 return -ENOMEM;
1696
1697 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1698 if (error)
1699 goto out_free_buf;
1700
1701 error = -EFAULT;
1702 if (copy_to_user(arg, &bmx, recsize))
1703 goto out_free_buf;
1704 arg += recsize;
1705
1706 for (i = 0; i < bmx.bmv_entries; i++) {
1707 if (!xfs_getbmap_format(buf + i, arg, recsize))
1708 goto out_free_buf;
1709 arg += recsize;
1710 }
1711
1712 error = 0;
1713out_free_buf:
1714 kmem_free(buf);
1715 return error;
1716}
1717
1718struct getfsmap_info {
1719 struct xfs_mount *mp;
1720 struct fsmap_head __user *data;
1721 unsigned int idx;
1722 __u32 last_flags;
1723};
1724
1725STATIC int
1726xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1727{
1728 struct getfsmap_info *info = priv;
1729 struct fsmap fm;
1730
1731 trace_xfs_getfsmap_mapping(info->mp, xfm);
1732
1733 info->last_flags = xfm->fmr_flags;
1734 xfs_fsmap_from_internal(&fm, xfm);
1735 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1736 sizeof(struct fsmap)))
1737 return -EFAULT;
1738
1739 return 0;
1740}
1741
1742STATIC int
1743xfs_ioc_getfsmap(
1744 struct xfs_inode *ip,
1745 struct fsmap_head __user *arg)
1746{
1747 struct getfsmap_info info = { NULL };
1748 struct xfs_fsmap_head xhead = {0};
1749 struct fsmap_head head;
1750 bool aborted = false;
1751 int error;
1752
1753 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1754 return -EFAULT;
1755 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1756 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1757 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1758 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1759 sizeof(head.fmh_keys[1].fmr_reserved)))
1760 return -EINVAL;
1761
1762 xhead.fmh_iflags = head.fmh_iflags;
1763 xhead.fmh_count = head.fmh_count;
1764 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1765 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1766
1767 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1768 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1769
1770 info.mp = ip->i_mount;
1771 info.data = arg;
1772 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1773 if (error == -ECANCELED) {
1774 error = 0;
1775 aborted = true;
1776 } else if (error)
1777 return error;
1778
1779 /* If we didn't abort, set the "last" flag in the last fmx */
1780 if (!aborted && info.idx) {
1781 info.last_flags |= FMR_OF_LAST;
1782 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1783 &info.last_flags, sizeof(info.last_flags)))
1784 return -EFAULT;
1785 }
1786
1787 /* copy back header */
1788 head.fmh_entries = xhead.fmh_entries;
1789 head.fmh_oflags = xhead.fmh_oflags;
1790 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1791 return -EFAULT;
1792
1793 return 0;
1794}
1795
1796STATIC int
1797xfs_ioc_scrub_metadata(
1798 struct xfs_inode *ip,
1799 void __user *arg)
1800{
1801 struct xfs_scrub_metadata scrub;
1802 int error;
1803
1804 if (!capable(CAP_SYS_ADMIN))
1805 return -EPERM;
1806
1807 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1808 return -EFAULT;
1809
1810 error = xfs_scrub_metadata(ip, &scrub);
1811 if (error)
1812 return error;
1813
1814 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1815 return -EFAULT;
1816
1817 return 0;
1818}
1819
1820int
1821xfs_ioc_swapext(
1822 xfs_swapext_t *sxp)
1823{
1824 xfs_inode_t *ip, *tip;
1825 struct fd f, tmp;
1826 int error = 0;
1827
1828 /* Pull information for the target fd */
1829 f = fdget((int)sxp->sx_fdtarget);
1830 if (!f.file) {
1831 error = -EINVAL;
1832 goto out;
1833 }
1834
1835 if (!(f.file->f_mode & FMODE_WRITE) ||
1836 !(f.file->f_mode & FMODE_READ) ||
1837 (f.file->f_flags & O_APPEND)) {
1838 error = -EBADF;
1839 goto out_put_file;
1840 }
1841
1842 tmp = fdget((int)sxp->sx_fdtmp);
1843 if (!tmp.file) {
1844 error = -EINVAL;
1845 goto out_put_file;
1846 }
1847
1848 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1849 !(tmp.file->f_mode & FMODE_READ) ||
1850 (tmp.file->f_flags & O_APPEND)) {
1851 error = -EBADF;
1852 goto out_put_tmp_file;
1853 }
1854
1855 if (IS_SWAPFILE(file_inode(f.file)) ||
1856 IS_SWAPFILE(file_inode(tmp.file))) {
1857 error = -EINVAL;
1858 goto out_put_tmp_file;
1859 }
1860
1861 /*
1862 * We need to ensure that the fds passed in point to XFS inodes
1863 * before we cast and access them as XFS structures as we have no
1864 * control over what the user passes us here.
1865 */
1866 if (f.file->f_op != &xfs_file_operations ||
1867 tmp.file->f_op != &xfs_file_operations) {
1868 error = -EINVAL;
1869 goto out_put_tmp_file;
1870 }
1871
1872 ip = XFS_I(file_inode(f.file));
1873 tip = XFS_I(file_inode(tmp.file));
1874
1875 if (ip->i_mount != tip->i_mount) {
1876 error = -EINVAL;
1877 goto out_put_tmp_file;
1878 }
1879
1880 if (ip->i_ino == tip->i_ino) {
1881 error = -EINVAL;
1882 goto out_put_tmp_file;
1883 }
1884
1885 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1886 error = -EIO;
1887 goto out_put_tmp_file;
1888 }
1889
1890 error = xfs_swap_extents(ip, tip, sxp);
1891
1892 out_put_tmp_file:
1893 fdput(tmp);
1894 out_put_file:
1895 fdput(f);
1896 out:
1897 return error;
1898}
1899
1900static int
1901xfs_ioc_getlabel(
1902 struct xfs_mount *mp,
1903 char __user *user_label)
1904{
1905 struct xfs_sb *sbp = &mp->m_sb;
1906 char label[XFSLABEL_MAX + 1];
1907
1908 /* Paranoia */
1909 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1910
1911 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1912 memset(label, 0, sizeof(label));
1913 spin_lock(&mp->m_sb_lock);
1914 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1915 spin_unlock(&mp->m_sb_lock);
1916
1917 if (copy_to_user(user_label, label, sizeof(label)))
1918 return -EFAULT;
1919 return 0;
1920}
1921
1922static int
1923xfs_ioc_setlabel(
1924 struct file *filp,
1925 struct xfs_mount *mp,
1926 char __user *newlabel)
1927{
1928 struct xfs_sb *sbp = &mp->m_sb;
1929 char label[XFSLABEL_MAX + 1];
1930 size_t len;
1931 int error;
1932
1933 if (!capable(CAP_SYS_ADMIN))
1934 return -EPERM;
1935 /*
1936 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1937 * smaller, at 12 bytes. We copy one more to be sure we find the
1938 * (required) NULL character to test the incoming label length.
1939 * NB: The on disk label doesn't need to be null terminated.
1940 */
1941 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1942 return -EFAULT;
1943 len = strnlen(label, XFSLABEL_MAX + 1);
1944 if (len > sizeof(sbp->sb_fname))
1945 return -EINVAL;
1946
1947 error = mnt_want_write_file(filp);
1948 if (error)
1949 return error;
1950
1951 spin_lock(&mp->m_sb_lock);
1952 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1953 memcpy(sbp->sb_fname, label, len);
1954 spin_unlock(&mp->m_sb_lock);
1955
1956 /*
1957 * Now we do several things to satisfy userspace.
1958 * In addition to normal logging of the primary superblock, we also
1959 * immediately write these changes to sector zero for the primary, then
1960 * update all backup supers (as xfs_db does for a label change), then
1961 * invalidate the block device page cache. This is so that any prior
1962 * buffered reads from userspace (i.e. from blkid) are invalidated,
1963 * and userspace will see the newly-written label.
1964 */
1965 error = xfs_sync_sb_buf(mp);
1966 if (error)
1967 goto out;
1968 /*
1969 * growfs also updates backup supers so lock against that.
1970 */
1971 mutex_lock(&mp->m_growlock);
1972 error = xfs_update_secondary_sbs(mp);
1973 mutex_unlock(&mp->m_growlock);
1974
1975 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1976
1977out:
1978 mnt_drop_write_file(filp);
1979 return error;
1980}
1981
1982static inline int
1983xfs_fs_eofblocks_from_user(
1984 struct xfs_fs_eofblocks *src,
1985 struct xfs_eofblocks *dst)
1986{
1987 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1988 return -EINVAL;
1989
1990 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1991 return -EINVAL;
1992
1993 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1994 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1995 return -EINVAL;
1996
1997 dst->eof_flags = src->eof_flags;
1998 dst->eof_prid = src->eof_prid;
1999 dst->eof_min_file_size = src->eof_min_file_size;
2000
2001 dst->eof_uid = INVALID_UID;
2002 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
2003 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
2004 if (!uid_valid(dst->eof_uid))
2005 return -EINVAL;
2006 }
2007
2008 dst->eof_gid = INVALID_GID;
2009 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
2010 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
2011 if (!gid_valid(dst->eof_gid))
2012 return -EINVAL;
2013 }
2014 return 0;
2015}
2016
2017/*
2018 * Note: some of the ioctl's return positive numbers as a
2019 * byte count indicating success, such as readlink_by_handle.
2020 * So we don't "sign flip" like most other routines. This means
2021 * true errors need to be returned as a negative value.
2022 */
2023long
2024xfs_file_ioctl(
2025 struct file *filp,
2026 unsigned int cmd,
2027 unsigned long p)
2028{
2029 struct inode *inode = file_inode(filp);
2030 struct xfs_inode *ip = XFS_I(inode);
2031 struct xfs_mount *mp = ip->i_mount;
2032 void __user *arg = (void __user *)p;
2033 int error;
2034
2035 trace_xfs_file_ioctl(ip);
2036
2037 switch (cmd) {
2038 case FITRIM:
2039 return xfs_ioc_trim(mp, arg);
2040 case FS_IOC_GETFSLABEL:
2041 return xfs_ioc_getlabel(mp, arg);
2042 case FS_IOC_SETFSLABEL:
2043 return xfs_ioc_setlabel(filp, mp, arg);
2044 case XFS_IOC_ALLOCSP:
2045 case XFS_IOC_FREESP:
2046 case XFS_IOC_ALLOCSP64:
2047 case XFS_IOC_FREESP64: {
2048 xfs_flock64_t bf;
2049
2050 if (copy_from_user(&bf, arg, sizeof(bf)))
2051 return -EFAULT;
2052 return xfs_ioc_space(filp, &bf);
2053 }
2054 case XFS_IOC_DIOINFO: {
2055 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
2056 struct dioattr da;
2057
2058 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
2059 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
2060
2061 if (copy_to_user(arg, &da, sizeof(da)))
2062 return -EFAULT;
2063 return 0;
2064 }
2065
2066 case XFS_IOC_FSBULKSTAT_SINGLE:
2067 case XFS_IOC_FSBULKSTAT:
2068 case XFS_IOC_FSINUMBERS:
2069 return xfs_ioc_fsbulkstat(mp, cmd, arg);
2070
2071 case XFS_IOC_BULKSTAT:
2072 return xfs_ioc_bulkstat(mp, cmd, arg);
2073 case XFS_IOC_INUMBERS:
2074 return xfs_ioc_inumbers(mp, cmd, arg);
2075
2076 case XFS_IOC_FSGEOMETRY_V1:
2077 return xfs_ioc_fsgeometry(mp, arg, 3);
2078 case XFS_IOC_FSGEOMETRY_V4:
2079 return xfs_ioc_fsgeometry(mp, arg, 4);
2080 case XFS_IOC_FSGEOMETRY:
2081 return xfs_ioc_fsgeometry(mp, arg, 5);
2082
2083 case XFS_IOC_AG_GEOMETRY:
2084 return xfs_ioc_ag_geometry(mp, arg);
2085
2086 case XFS_IOC_GETVERSION:
2087 return put_user(inode->i_generation, (int __user *)arg);
2088
2089 case XFS_IOC_FSGETXATTR:
2090 return xfs_ioc_fsgetxattr(ip, 0, arg);
2091 case XFS_IOC_FSGETXATTRA:
2092 return xfs_ioc_fsgetxattr(ip, 1, arg);
2093 case XFS_IOC_FSSETXATTR:
2094 return xfs_ioc_fssetxattr(ip, filp, arg);
2095 case XFS_IOC_GETXFLAGS:
2096 return xfs_ioc_getxflags(ip, arg);
2097 case XFS_IOC_SETXFLAGS:
2098 return xfs_ioc_setxflags(ip, filp, arg);
2099
2100 case XFS_IOC_GETBMAP:
2101 case XFS_IOC_GETBMAPA:
2102 case XFS_IOC_GETBMAPX:
2103 return xfs_ioc_getbmap(filp, cmd, arg);
2104
2105 case FS_IOC_GETFSMAP:
2106 return xfs_ioc_getfsmap(ip, arg);
2107
2108 case XFS_IOC_SCRUB_METADATA:
2109 return xfs_ioc_scrub_metadata(ip, arg);
2110
2111 case XFS_IOC_FD_TO_HANDLE:
2112 case XFS_IOC_PATH_TO_HANDLE:
2113 case XFS_IOC_PATH_TO_FSHANDLE: {
2114 xfs_fsop_handlereq_t hreq;
2115
2116 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2117 return -EFAULT;
2118 return xfs_find_handle(cmd, &hreq);
2119 }
2120 case XFS_IOC_OPEN_BY_HANDLE: {
2121 xfs_fsop_handlereq_t hreq;
2122
2123 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2124 return -EFAULT;
2125 return xfs_open_by_handle(filp, &hreq);
2126 }
2127
2128 case XFS_IOC_READLINK_BY_HANDLE: {
2129 xfs_fsop_handlereq_t hreq;
2130
2131 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2132 return -EFAULT;
2133 return xfs_readlink_by_handle(filp, &hreq);
2134 }
2135 case XFS_IOC_ATTRLIST_BY_HANDLE:
2136 return xfs_attrlist_by_handle(filp, arg);
2137
2138 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2139 return xfs_attrmulti_by_handle(filp, arg);
2140
2141 case XFS_IOC_SWAPEXT: {
2142 struct xfs_swapext sxp;
2143
2144 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2145 return -EFAULT;
2146 error = mnt_want_write_file(filp);
2147 if (error)
2148 return error;
2149 error = xfs_ioc_swapext(&sxp);
2150 mnt_drop_write_file(filp);
2151 return error;
2152 }
2153
2154 case XFS_IOC_FSCOUNTS: {
2155 xfs_fsop_counts_t out;
2156
2157 xfs_fs_counts(mp, &out);
2158
2159 if (copy_to_user(arg, &out, sizeof(out)))
2160 return -EFAULT;
2161 return 0;
2162 }
2163
2164 case XFS_IOC_SET_RESBLKS: {
2165 xfs_fsop_resblks_t inout;
2166 uint64_t in;
2167
2168 if (!capable(CAP_SYS_ADMIN))
2169 return -EPERM;
2170
2171 if (mp->m_flags & XFS_MOUNT_RDONLY)
2172 return -EROFS;
2173
2174 if (copy_from_user(&inout, arg, sizeof(inout)))
2175 return -EFAULT;
2176
2177 error = mnt_want_write_file(filp);
2178 if (error)
2179 return error;
2180
2181 /* input parameter is passed in resblks field of structure */
2182 in = inout.resblks;
2183 error = xfs_reserve_blocks(mp, &in, &inout);
2184 mnt_drop_write_file(filp);
2185 if (error)
2186 return error;
2187
2188 if (copy_to_user(arg, &inout, sizeof(inout)))
2189 return -EFAULT;
2190 return 0;
2191 }
2192
2193 case XFS_IOC_GET_RESBLKS: {
2194 xfs_fsop_resblks_t out;
2195
2196 if (!capable(CAP_SYS_ADMIN))
2197 return -EPERM;
2198
2199 error = xfs_reserve_blocks(mp, NULL, &out);
2200 if (error)
2201 return error;
2202
2203 if (copy_to_user(arg, &out, sizeof(out)))
2204 return -EFAULT;
2205
2206 return 0;
2207 }
2208
2209 case XFS_IOC_FSGROWFSDATA: {
2210 xfs_growfs_data_t in;
2211
2212 if (copy_from_user(&in, arg, sizeof(in)))
2213 return -EFAULT;
2214
2215 error = mnt_want_write_file(filp);
2216 if (error)
2217 return error;
2218 error = xfs_growfs_data(mp, &in);
2219 mnt_drop_write_file(filp);
2220 return error;
2221 }
2222
2223 case XFS_IOC_FSGROWFSLOG: {
2224 xfs_growfs_log_t in;
2225
2226 if (copy_from_user(&in, arg, sizeof(in)))
2227 return -EFAULT;
2228
2229 error = mnt_want_write_file(filp);
2230 if (error)
2231 return error;
2232 error = xfs_growfs_log(mp, &in);
2233 mnt_drop_write_file(filp);
2234 return error;
2235 }
2236
2237 case XFS_IOC_FSGROWFSRT: {
2238 xfs_growfs_rt_t in;
2239
2240 if (copy_from_user(&in, arg, sizeof(in)))
2241 return -EFAULT;
2242
2243 error = mnt_want_write_file(filp);
2244 if (error)
2245 return error;
2246 error = xfs_growfs_rt(mp, &in);
2247 mnt_drop_write_file(filp);
2248 return error;
2249 }
2250
2251 case XFS_IOC_GOINGDOWN: {
2252 uint32_t in;
2253
2254 if (!capable(CAP_SYS_ADMIN))
2255 return -EPERM;
2256
2257 if (get_user(in, (uint32_t __user *)arg))
2258 return -EFAULT;
2259
2260 return xfs_fs_goingdown(mp, in);
2261 }
2262
2263 case XFS_IOC_ERROR_INJECTION: {
2264 xfs_error_injection_t in;
2265
2266 if (!capable(CAP_SYS_ADMIN))
2267 return -EPERM;
2268
2269 if (copy_from_user(&in, arg, sizeof(in)))
2270 return -EFAULT;
2271
2272 return xfs_errortag_add(mp, in.errtag);
2273 }
2274
2275 case XFS_IOC_ERROR_CLEARALL:
2276 if (!capable(CAP_SYS_ADMIN))
2277 return -EPERM;
2278
2279 return xfs_errortag_clearall(mp);
2280
2281 case XFS_IOC_FREE_EOFBLOCKS: {
2282 struct xfs_fs_eofblocks eofb;
2283 struct xfs_eofblocks keofb;
2284
2285 if (!capable(CAP_SYS_ADMIN))
2286 return -EPERM;
2287
2288 if (mp->m_flags & XFS_MOUNT_RDONLY)
2289 return -EROFS;
2290
2291 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2292 return -EFAULT;
2293
2294 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2295 if (error)
2296 return error;
2297
2298 sb_start_write(mp->m_super);
2299 error = xfs_icache_free_eofblocks(mp, &keofb);
2300 sb_end_write(mp->m_super);
2301 return error;
2302 }
2303
2304 default:
2305 return -ENOTTY;
2306 }
2307}