1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #include "xfs_platform.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_rtrmap_btree.h"
41 #include "xfs_file.h"
42 #include "xfs_exchrange.h"
43 #include "xfs_handle.h"
44 #include "xfs_rtgroup.h"
45 #include "xfs_healthmon.h"
46 #include "xfs_verify_media.h"
47 #include "xfs_zone_priv.h"
48 #include "xfs_zone_alloc.h"
49
50 #include <linux/mount.h>
51 #include <linux/fileattr.h>
52
53 /* Return 0 on success or positive error */
54 int
xfs_fsbulkstat_one_fmt(struct xfs_ibulk * breq,const struct xfs_bulkstat * bstat)55 xfs_fsbulkstat_one_fmt(
56 struct xfs_ibulk *breq,
57 const struct xfs_bulkstat *bstat)
58 {
59 struct xfs_bstat bs1;
60
61 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
62 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
63 return -EFAULT;
64 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
65 }
66
67 int
xfs_fsinumbers_fmt(struct xfs_ibulk * breq,const struct xfs_inumbers * igrp)68 xfs_fsinumbers_fmt(
69 struct xfs_ibulk *breq,
70 const struct xfs_inumbers *igrp)
71 {
72 struct xfs_inogrp ig1;
73
74 xfs_inumbers_to_inogrp(&ig1, igrp);
75 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
76 return -EFAULT;
77 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
78 }
79
80 STATIC int
xfs_ioc_fsbulkstat(struct file * file,unsigned int cmd,void __user * arg)81 xfs_ioc_fsbulkstat(
82 struct file *file,
83 unsigned int cmd,
84 void __user *arg)
85 {
86 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
87 struct xfs_fsop_bulkreq bulkreq;
88 struct xfs_ibulk breq = {
89 .mp = mp,
90 .idmap = file_mnt_idmap(file),
91 .ocount = 0,
92 };
93 xfs_ino_t lastino;
94 int error;
95
96 /* done = 1 if there are more stats to get and if bulkstat */
97 /* should be called again (unused here, but used in dmapi) */
98
99 if (!capable(CAP_SYS_ADMIN))
100 return -EPERM;
101
102 if (xfs_is_shutdown(mp))
103 return -EIO;
104
105 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
106 return -EFAULT;
107
108 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
109 return -EFAULT;
110
111 if (bulkreq.icount <= 0)
112 return -EINVAL;
113
114 if (bulkreq.ubuffer == NULL)
115 return -EINVAL;
116
117 breq.ubuffer = bulkreq.ubuffer;
118 breq.icount = bulkreq.icount;
119
120 /*
121 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
122 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
123 * that *lastip contains either zero or the number of the last inode to
124 * be examined by the previous call and return results starting with
125 * the next inode after that. The new bulk request back end functions
126 * take the inode to start with, so we have to compute the startino
127 * parameter from lastino to maintain correct function. lastino == 0
128 * is a special case because it has traditionally meant "first inode
129 * in filesystem".
130 */
131 if (cmd == XFS_IOC_FSINUMBERS) {
132 breq.startino = lastino ? lastino + 1 : 0;
133 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
134 lastino = breq.startino - 1;
135 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
136 breq.startino = lastino;
137 breq.icount = 1;
138 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
139 } else { /* XFS_IOC_FSBULKSTAT */
140 breq.startino = lastino ? lastino + 1 : 0;
141 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
142 lastino = breq.startino - 1;
143 }
144
145 if (error)
146 return error;
147
148 if (bulkreq.lastip != NULL &&
149 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
150 return -EFAULT;
151
152 if (bulkreq.ocount != NULL &&
153 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
154 return -EFAULT;
155
156 return 0;
157 }
158
159 /* Return 0 on success or positive error */
160 static int
xfs_bulkstat_fmt(struct xfs_ibulk * breq,const struct xfs_bulkstat * bstat)161 xfs_bulkstat_fmt(
162 struct xfs_ibulk *breq,
163 const struct xfs_bulkstat *bstat)
164 {
165 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
166 return -EFAULT;
167 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
168 }
169
170 /*
171 * Check the incoming bulk request @hdr from userspace and initialize the
172 * internal @breq bulk request appropriately. Returns 0 if the bulk request
173 * should proceed; -ECANCELED if there's nothing to do; or the usual
174 * negative error code.
175 */
176 static int
xfs_bulk_ireq_setup(struct xfs_mount * mp,const struct xfs_bulk_ireq * hdr,struct xfs_ibulk * breq,void __user * ubuffer)177 xfs_bulk_ireq_setup(
178 struct xfs_mount *mp,
179 const struct xfs_bulk_ireq *hdr,
180 struct xfs_ibulk *breq,
181 void __user *ubuffer)
182 {
183 if (hdr->icount == 0 ||
184 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
185 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
186 return -EINVAL;
187
188 breq->startino = hdr->ino;
189 breq->ubuffer = ubuffer;
190 breq->icount = hdr->icount;
191 breq->ocount = 0;
192 breq->flags = 0;
193
194 /*
195 * The @ino parameter is a special value, so we must look it up here.
196 * We're not allowed to have IREQ_AGNO, and we only return one inode
197 * worth of data.
198 */
199 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
200 if (hdr->flags & XFS_BULK_IREQ_AGNO)
201 return -EINVAL;
202
203 switch (hdr->ino) {
204 case XFS_BULK_IREQ_SPECIAL_ROOT:
205 breq->startino = mp->m_sb.sb_rootino;
206 break;
207 default:
208 return -EINVAL;
209 }
210 breq->icount = 1;
211 }
212
213 /*
214 * The IREQ_AGNO flag means that we only want results from a given AG.
215 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
216 * beyond the specified AG then we return no results.
217 */
218 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
219 if (hdr->agno >= mp->m_sb.sb_agcount)
220 return -EINVAL;
221
222 if (breq->startino == 0)
223 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
224 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
225 return -EINVAL;
226
227 breq->iwalk_flags |= XFS_IWALK_SAME_AG;
228
229 /* Asking for an inode past the end of the AG? We're done! */
230 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
231 return -ECANCELED;
232 } else if (hdr->agno)
233 return -EINVAL;
234
235 /* Asking for an inode past the end of the FS? We're done! */
236 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
237 return -ECANCELED;
238
239 if (hdr->flags & XFS_BULK_IREQ_NREXT64)
240 breq->flags |= XFS_IBULK_NREXT64;
241
242 /* Caller wants to see metadata directories in bulkstat output. */
243 if (hdr->flags & XFS_BULK_IREQ_METADIR)
244 breq->flags |= XFS_IBULK_METADIR;
245
246 return 0;
247 }
248
249 /*
250 * Update the userspace bulk request @hdr to reflect the end state of the
251 * internal bulk request @breq.
252 */
253 static void
xfs_bulk_ireq_teardown(struct xfs_bulk_ireq * hdr,struct xfs_ibulk * breq)254 xfs_bulk_ireq_teardown(
255 struct xfs_bulk_ireq *hdr,
256 struct xfs_ibulk *breq)
257 {
258 hdr->ino = breq->startino;
259 hdr->ocount = breq->ocount;
260 }
261
262 /* Handle the v5 bulkstat ioctl. */
263 STATIC int
xfs_ioc_bulkstat(struct file * file,unsigned int cmd,struct xfs_bulkstat_req __user * arg)264 xfs_ioc_bulkstat(
265 struct file *file,
266 unsigned int cmd,
267 struct xfs_bulkstat_req __user *arg)
268 {
269 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
270 struct xfs_bulk_ireq hdr;
271 struct xfs_ibulk breq = {
272 .mp = mp,
273 .idmap = file_mnt_idmap(file),
274 };
275 int error;
276
277 if (!capable(CAP_SYS_ADMIN))
278 return -EPERM;
279
280 if (xfs_is_shutdown(mp))
281 return -EIO;
282
283 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
284 return -EFAULT;
285
286 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
287 if (error == -ECANCELED)
288 goto out_teardown;
289 if (error < 0)
290 return error;
291
292 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
293 if (error)
294 return error;
295
296 out_teardown:
297 xfs_bulk_ireq_teardown(&hdr, &breq);
298 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
299 return -EFAULT;
300
301 return 0;
302 }
303
304 STATIC int
xfs_inumbers_fmt(struct xfs_ibulk * breq,const struct xfs_inumbers * igrp)305 xfs_inumbers_fmt(
306 struct xfs_ibulk *breq,
307 const struct xfs_inumbers *igrp)
308 {
309 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
310 return -EFAULT;
311 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
312 }
313
314 /* Handle the v5 inumbers ioctl. */
315 STATIC int
xfs_ioc_inumbers(struct xfs_mount * mp,unsigned int cmd,struct xfs_inumbers_req __user * arg)316 xfs_ioc_inumbers(
317 struct xfs_mount *mp,
318 unsigned int cmd,
319 struct xfs_inumbers_req __user *arg)
320 {
321 struct xfs_bulk_ireq hdr;
322 struct xfs_ibulk breq = {
323 .mp = mp,
324 };
325 int error;
326
327 if (!capable(CAP_SYS_ADMIN))
328 return -EPERM;
329
330 if (xfs_is_shutdown(mp))
331 return -EIO;
332
333 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
334 return -EFAULT;
335
336 if (hdr.flags & XFS_BULK_IREQ_METADIR)
337 return -EINVAL;
338
339 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
340 if (error == -ECANCELED)
341 goto out_teardown;
342 if (error < 0)
343 return error;
344
345 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
346 if (error)
347 return error;
348
349 out_teardown:
350 xfs_bulk_ireq_teardown(&hdr, &breq);
351 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
352 return -EFAULT;
353
354 return 0;
355 }
356
357 STATIC int
xfs_ioc_fsgeometry(struct xfs_mount * mp,void __user * arg,int struct_version)358 xfs_ioc_fsgeometry(
359 struct xfs_mount *mp,
360 void __user *arg,
361 int struct_version)
362 {
363 struct xfs_fsop_geom fsgeo;
364 size_t len;
365
366 xfs_fs_geometry(mp, &fsgeo, struct_version);
367
368 if (struct_version <= 3)
369 len = sizeof(struct xfs_fsop_geom_v1);
370 else if (struct_version == 4)
371 len = sizeof(struct xfs_fsop_geom_v4);
372 else {
373 xfs_fsop_geom_health(mp, &fsgeo);
374 len = sizeof(fsgeo);
375 }
376
377 if (copy_to_user(arg, &fsgeo, len))
378 return -EFAULT;
379 return 0;
380 }
381
382 STATIC int
xfs_ioc_ag_geometry(struct xfs_mount * mp,void __user * arg)383 xfs_ioc_ag_geometry(
384 struct xfs_mount *mp,
385 void __user *arg)
386 {
387 struct xfs_perag *pag;
388 struct xfs_ag_geometry ageo;
389 int error;
390
391 if (copy_from_user(&ageo, arg, sizeof(ageo)))
392 return -EFAULT;
393 if (ageo.ag_flags)
394 return -EINVAL;
395 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
396 return -EINVAL;
397
398 pag = xfs_perag_get(mp, ageo.ag_number);
399 if (!pag)
400 return -EINVAL;
401
402 error = xfs_ag_get_geometry(pag, &ageo);
403 xfs_perag_put(pag);
404 if (error)
405 return error;
406
407 if (copy_to_user(arg, &ageo, sizeof(ageo)))
408 return -EFAULT;
409 return 0;
410 }
411
412 static void
xfs_rtgroup_report_write_pointer(struct xfs_rtgroup * rtg,struct xfs_rtgroup_geometry * rgeo)413 xfs_rtgroup_report_write_pointer(
414 struct xfs_rtgroup *rtg,
415 struct xfs_rtgroup_geometry *rgeo)
416 {
417 xfs_rtgroup_lock(rtg, XFS_RTGLOCK_RMAP);
418 if (rtg->rtg_open_zone) {
419 rgeo->rg_writepointer = rtg->rtg_open_zone->oz_allocated;
420 } else {
421 xfs_rgblock_t highest_rgbno = xfs_rtrmap_highest_rgbno(rtg);
422
423 if (highest_rgbno == NULLRGBLOCK)
424 rgeo->rg_writepointer = 0;
425 else
426 rgeo->rg_writepointer = highest_rgbno + 1;
427 }
428 xfs_rtgroup_unlock(rtg, XFS_RTGLOCK_RMAP);
429 rgeo->rg_flags |= XFS_RTGROUP_GEOM_WRITEPOINTER;
430 }
431
432 STATIC int
xfs_ioc_rtgroup_geometry(struct xfs_mount * mp,void __user * arg)433 xfs_ioc_rtgroup_geometry(
434 struct xfs_mount *mp,
435 void __user *arg)
436 {
437 struct xfs_rtgroup *rtg;
438 struct xfs_rtgroup_geometry rgeo;
439 int error;
440
441 if (copy_from_user(&rgeo, arg, sizeof(rgeo)))
442 return -EFAULT;
443 if (rgeo.rg_flags)
444 return -EINVAL;
445 if (memchr_inv(&rgeo.rg_reserved, 0, sizeof(rgeo.rg_reserved)))
446 return -EINVAL;
447 if (!xfs_has_rtgroups(mp))
448 return -EINVAL;
449
450 rtg = xfs_rtgroup_get(mp, rgeo.rg_number);
451 if (!rtg)
452 return -EINVAL;
453
454 error = xfs_rtgroup_get_geometry(rtg, &rgeo);
455 if (error)
456 goto out_put_rtg;
457 if (xfs_has_zoned(mp))
458 xfs_rtgroup_report_write_pointer(rtg, &rgeo);
459
460 if (copy_to_user(arg, &rgeo, sizeof(rgeo)))
461 error = -EFAULT;
462 out_put_rtg:
463 xfs_rtgroup_put(rtg);
464 return error;
465 }
466
467 /*
468 * Linux extended inode flags interface.
469 */
470
471 static void
xfs_fill_fsxattr(struct xfs_inode * ip,int whichfork,struct file_kattr * fa)472 xfs_fill_fsxattr(
473 struct xfs_inode *ip,
474 int whichfork,
475 struct file_kattr *fa)
476 {
477 struct xfs_mount *mp = ip->i_mount;
478 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
479
480 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
481
482 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
483 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
484 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
485 /*
486 * Don't let a misaligned extent size hint on a directory
487 * escape to userspace if it won't pass the setattr checks
488 * later.
489 */
490 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
491 xfs_extlen_to_rtxmod(mp, ip->i_extsize) > 0) {
492 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
493 FS_XFLAG_EXTSZINHERIT);
494 fa->fsx_extsize = 0;
495 } else {
496 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
497 }
498 }
499
500 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) {
501 /*
502 * Don't let a misaligned CoW extent size hint on a directory
503 * escape to userspace if it won't pass the setattr checks
504 * later.
505 */
506 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
507 ip->i_cowextsize % mp->m_sb.sb_rextsize > 0) {
508 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
509 fa->fsx_cowextsize = 0;
510 } else {
511 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
512 }
513 }
514
515 fa->fsx_projid = ip->i_projid;
516 if (ifp && !xfs_need_iread_extents(ifp))
517 fa->fsx_nextents = xfs_iext_count(ifp);
518 else
519 fa->fsx_nextents = xfs_ifork_nextents(ifp);
520 }
521
522 STATIC int
xfs_ioc_fsgetxattra(xfs_inode_t * ip,void __user * arg)523 xfs_ioc_fsgetxattra(
524 xfs_inode_t *ip,
525 void __user *arg)
526 {
527 struct file_kattr fa = {};
528
529 xfs_ilock(ip, XFS_ILOCK_SHARED);
530 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
531 xfs_iunlock(ip, XFS_ILOCK_SHARED);
532
533 return copy_fsxattr_to_user(&fa, arg);
534 }
535
536 int
xfs_fileattr_get(struct dentry * dentry,struct file_kattr * fa)537 xfs_fileattr_get(
538 struct dentry *dentry,
539 struct file_kattr *fa)
540 {
541 struct xfs_inode *ip = XFS_I(d_inode(dentry));
542
543 xfs_ilock(ip, XFS_ILOCK_SHARED);
544 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
545 xfs_iunlock(ip, XFS_ILOCK_SHARED);
546
547 return 0;
548 }
549
550 static int
xfs_ioctl_setattr_xflags(struct xfs_trans * tp,struct xfs_inode * ip,struct file_kattr * fa)551 xfs_ioctl_setattr_xflags(
552 struct xfs_trans *tp,
553 struct xfs_inode *ip,
554 struct file_kattr *fa)
555 {
556 struct xfs_mount *mp = ip->i_mount;
557 bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME);
558 uint64_t i_flags2;
559
560 if (rtflag != XFS_IS_REALTIME_INODE(ip)) {
561 /* Can't change realtime flag if any extents are allocated. */
562 if (xfs_inode_has_filedata(ip))
563 return -EINVAL;
564
565 /*
566 * If S_DAX is enabled on this file, we can only switch the
567 * device if both support fsdax. We can't update S_DAX because
568 * there might be other threads walking down the access paths.
569 */
570 if (IS_DAX(VFS_I(ip)) &&
571 (mp->m_ddev_targp->bt_daxdev == NULL ||
572 (mp->m_rtdev_targp &&
573 mp->m_rtdev_targp->bt_daxdev == NULL)))
574 return -EINVAL;
575 }
576
577 if (rtflag) {
578 /* If realtime flag is set then must have realtime device */
579 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
580 xfs_extlen_to_rtxmod(mp, ip->i_extsize))
581 return -EINVAL;
582 }
583
584 /* diflags2 only valid for v3 inodes. */
585 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
586 if (i_flags2 && !xfs_has_v3inodes(mp))
587 return -EINVAL;
588
589 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
590 ip->i_diflags2 = i_flags2;
591
592 xfs_diflags_to_iflags(ip, false);
593
594 /*
595 * Make the stable writes flag match that of the device the inode
596 * resides on when flipping the RT flag.
597 */
598 if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode))
599 xfs_update_stable_writes(ip);
600
601 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
602 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
603 XFS_STATS_INC(mp, xs_ig_attrchg);
604 return 0;
605 }
606
607 static void
xfs_ioctl_setattr_prepare_dax(struct xfs_inode * ip,struct file_kattr * fa)608 xfs_ioctl_setattr_prepare_dax(
609 struct xfs_inode *ip,
610 struct file_kattr *fa)
611 {
612 struct xfs_mount *mp = ip->i_mount;
613 struct inode *inode = VFS_I(ip);
614
615 if (S_ISDIR(inode->i_mode))
616 return;
617
618 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
619 return;
620
621 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
622 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
623 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
624 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
625 d_mark_dontcache(inode);
626 }
627
628 /*
629 * Set up the transaction structure for the setattr operation, checking that we
630 * have permission to do so. On success, return a clean transaction and the
631 * inode locked exclusively ready for further operation specific checks. On
632 * failure, return an error without modifying or locking the inode.
633 */
634 static struct xfs_trans *
xfs_ioctl_setattr_get_trans(struct xfs_inode * ip,struct xfs_dquot * pdqp)635 xfs_ioctl_setattr_get_trans(
636 struct xfs_inode *ip,
637 struct xfs_dquot *pdqp)
638 {
639 struct xfs_mount *mp = ip->i_mount;
640 struct xfs_trans *tp;
641 int error = -EROFS;
642
643 if (xfs_is_readonly(mp))
644 goto out_error;
645 error = -EIO;
646 if (xfs_is_shutdown(mp))
647 goto out_error;
648
649 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
650 capable_noaudit(CAP_FOWNER), &tp);
651 if (error)
652 goto out_error;
653
654 if (xfs_has_wsync(mp))
655 xfs_trans_set_sync(tp);
656
657 return tp;
658
659 out_error:
660 return ERR_PTR(error);
661 }
662
663 /*
664 * Validate a proposed extent size hint. For regular files, the hint can only
665 * be changed if no extents are allocated.
666 */
667 static int
xfs_ioctl_setattr_check_extsize(struct xfs_inode * ip,struct file_kattr * fa)668 xfs_ioctl_setattr_check_extsize(
669 struct xfs_inode *ip,
670 struct file_kattr *fa)
671 {
672 struct xfs_mount *mp = ip->i_mount;
673 xfs_failaddr_t failaddr;
674 uint16_t new_diflags;
675
676 if (!fa->fsx_valid)
677 return 0;
678
679 if (S_ISREG(VFS_I(ip)->i_mode) && xfs_inode_has_filedata(ip) &&
680 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
681 return -EINVAL;
682
683 if (fa->fsx_extsize & mp->m_blockmask)
684 return -EINVAL;
685
686 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
687
688 /*
689 * Inode verifiers do not check that the extent size hint is an integer
690 * multiple of the rt extent size on a directory with both rtinherit
691 * and extszinherit flags set. Don't let sysadmins misconfigure
692 * directories.
693 */
694 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
695 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
696 unsigned int rtextsize_bytes;
697
698 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
699 if (fa->fsx_extsize % rtextsize_bytes)
700 return -EINVAL;
701 }
702
703 failaddr = xfs_inode_validate_extsize(ip->i_mount,
704 XFS_B_TO_FSB(mp, fa->fsx_extsize),
705 VFS_I(ip)->i_mode, new_diflags);
706 return failaddr != NULL ? -EINVAL : 0;
707 }
708
709 static int
xfs_ioctl_setattr_check_cowextsize(struct xfs_inode * ip,struct file_kattr * fa)710 xfs_ioctl_setattr_check_cowextsize(
711 struct xfs_inode *ip,
712 struct file_kattr *fa)
713 {
714 struct xfs_mount *mp = ip->i_mount;
715 xfs_failaddr_t failaddr;
716 uint64_t new_diflags2;
717 uint16_t new_diflags;
718
719 if (!fa->fsx_valid)
720 return 0;
721
722 if (fa->fsx_cowextsize & mp->m_blockmask)
723 return -EINVAL;
724
725 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
726 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
727
728 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
729 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
730 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
731 return failaddr != NULL ? -EINVAL : 0;
732 }
733
734 static int
xfs_ioctl_setattr_check_projid(struct xfs_inode * ip,struct file_kattr * fa)735 xfs_ioctl_setattr_check_projid(
736 struct xfs_inode *ip,
737 struct file_kattr *fa)
738 {
739 if (!fa->fsx_valid)
740 return 0;
741
742 /* Disallow 32bit project ids if 32bit IDs are not enabled. */
743 if (fa->fsx_projid > (uint16_t)-1 &&
744 !xfs_has_projid32(ip->i_mount))
745 return -EINVAL;
746 return 0;
747 }
748
749 int
xfs_fileattr_set(struct mnt_idmap * idmap,struct dentry * dentry,struct file_kattr * fa)750 xfs_fileattr_set(
751 struct mnt_idmap *idmap,
752 struct dentry *dentry,
753 struct file_kattr *fa)
754 {
755 struct xfs_inode *ip = XFS_I(d_inode(dentry));
756 struct xfs_mount *mp = ip->i_mount;
757 struct xfs_trans *tp;
758 struct xfs_dquot *pdqp = NULL;
759 struct xfs_dquot *olddquot = NULL;
760 int error;
761
762 trace_xfs_ioctl_setattr(ip);
763
764 if (!fa->fsx_valid) {
765 unsigned int allowed = FS_IMMUTABLE_FL | FS_APPEND_FL |
766 FS_NOATIME_FL | FS_NODUMP_FL |
767 FS_SYNC_FL | FS_DAX_FL |
768 FS_PROJINHERIT_FL;
769
770 /*
771 * FS_CASEFOLD_FL reflects the ASCIICI superblock feature,
772 * a read-only property. Accept it as a no-op so chattr's
773 * RMW round-trip succeeds; reject any attempt to enable
774 * it on a non-ASCIICI filesystem. xfs_flags2diflags()
775 * has no clause for CASEFOLD, so the bit is dropped from
776 * the on-disk diflags regardless.
777 */
778 if (xfs_has_asciici(mp))
779 allowed |= FS_CASEFOLD_FL;
780
781 if (fa->flags & ~allowed)
782 return -EOPNOTSUPP;
783 }
784
785 error = xfs_ioctl_setattr_check_projid(ip, fa);
786 if (error)
787 return error;
788
789 /*
790 * If disk quotas is on, we make sure that the dquots do exist on disk,
791 * before we start any other transactions. Trying to do this later
792 * is messy. We don't care to take a readlock to look at the ids
793 * in inode here, because we can't hold it across the trans_reserve.
794 * If the IDs do change before we take the ilock, we're covered
795 * because the i_*dquot fields will get updated anyway.
796 */
797 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
798 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
799 VFS_I(ip)->i_gid, fa->fsx_projid,
800 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
801 if (error)
802 return error;
803 }
804
805 xfs_ioctl_setattr_prepare_dax(ip, fa);
806
807 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
808 if (IS_ERR(tp)) {
809 error = PTR_ERR(tp);
810 goto error_free_dquots;
811 }
812
813 error = xfs_ioctl_setattr_check_extsize(ip, fa);
814 if (error)
815 goto error_trans_cancel;
816
817 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
818 if (error)
819 goto error_trans_cancel;
820
821 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
822 if (error)
823 goto error_trans_cancel;
824
825 if (!fa->fsx_valid)
826 goto skip_xattr;
827 /*
828 * Change file ownership. Must be the owner or privileged. CAP_FSETID
829 * overrides the following restrictions:
830 *
831 * The set-user-ID and set-group-ID bits of a file will be cleared upon
832 * successful return from chown()
833 */
834
835 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
836 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID))
837 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
838
839 /* Change the ownerships and register project quota modifications */
840 if (ip->i_projid != fa->fsx_projid) {
841 if (XFS_IS_PQUOTA_ON(mp)) {
842 olddquot = xfs_qm_vop_chown(tp, ip,
843 &ip->i_pdquot, pdqp);
844 }
845 ip->i_projid = fa->fsx_projid;
846 }
847
848 /*
849 * Only set the extent size hint if we've already determined that the
850 * extent size hint should be set on the inode. If no extent size flags
851 * are set on the inode then unconditionally clear the extent size hint.
852 */
853 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
854 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
855 else
856 ip->i_extsize = 0;
857
858 if (xfs_has_v3inodes(mp)) {
859 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
860 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
861 else
862 ip->i_cowextsize = 0;
863 }
864
865 skip_xattr:
866 error = xfs_trans_commit(tp);
867
868 /*
869 * Release any dquot(s) the inode had kept before chown.
870 */
871 xfs_qm_dqrele(olddquot);
872 xfs_qm_dqrele(pdqp);
873
874 return error;
875
876 error_trans_cancel:
877 xfs_trans_cancel(tp);
878 error_free_dquots:
879 xfs_qm_dqrele(pdqp);
880 return error;
881 }
882
883 static bool
xfs_getbmap_format(struct kgetbmap * p,struct getbmapx __user * u,size_t recsize)884 xfs_getbmap_format(
885 struct kgetbmap *p,
886 struct getbmapx __user *u,
887 size_t recsize)
888 {
889 if (put_user(p->bmv_offset, &u->bmv_offset) ||
890 put_user(p->bmv_block, &u->bmv_block) ||
891 put_user(p->bmv_length, &u->bmv_length) ||
892 put_user(0, &u->bmv_count) ||
893 put_user(0, &u->bmv_entries))
894 return false;
895 if (recsize < sizeof(struct getbmapx))
896 return true;
897 if (put_user(0, &u->bmv_iflags) ||
898 put_user(p->bmv_oflags, &u->bmv_oflags) ||
899 put_user(0, &u->bmv_unused1) ||
900 put_user(0, &u->bmv_unused2))
901 return false;
902 return true;
903 }
904
905 STATIC int
xfs_ioc_getbmap(struct file * file,unsigned int cmd,void __user * arg)906 xfs_ioc_getbmap(
907 struct file *file,
908 unsigned int cmd,
909 void __user *arg)
910 {
911 struct getbmapx bmx = { 0 };
912 struct kgetbmap *buf;
913 size_t recsize;
914 int error, i;
915
916 switch (cmd) {
917 case XFS_IOC_GETBMAPA:
918 bmx.bmv_iflags = BMV_IF_ATTRFORK;
919 fallthrough;
920 case XFS_IOC_GETBMAP:
921 /* struct getbmap is a strict subset of struct getbmapx. */
922 recsize = sizeof(struct getbmap);
923 break;
924 case XFS_IOC_GETBMAPX:
925 recsize = sizeof(struct getbmapx);
926 break;
927 default:
928 return -EINVAL;
929 }
930
931 if (copy_from_user(&bmx, arg, recsize))
932 return -EFAULT;
933
934 if (bmx.bmv_count < 2)
935 return -EINVAL;
936 if (bmx.bmv_count >= INT_MAX / recsize)
937 return -ENOMEM;
938
939 buf = kvzalloc_objs(*buf, bmx.bmv_count);
940 if (!buf)
941 return -ENOMEM;
942
943 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
944 if (error)
945 goto out_free_buf;
946
947 error = -EFAULT;
948 if (copy_to_user(arg, &bmx, recsize))
949 goto out_free_buf;
950 arg += recsize;
951
952 for (i = 0; i < bmx.bmv_entries; i++) {
953 if (!xfs_getbmap_format(buf + i, arg, recsize))
954 goto out_free_buf;
955 arg += recsize;
956 }
957
958 error = 0;
959 out_free_buf:
960 kvfree(buf);
961 return error;
962 }
963
964 int
xfs_ioc_swapext(xfs_swapext_t * sxp)965 xfs_ioc_swapext(
966 xfs_swapext_t *sxp)
967 {
968 xfs_inode_t *ip, *tip;
969
970 /* Pull information for the target fd */
971 CLASS(fd, f)((int)sxp->sx_fdtarget);
972 if (fd_empty(f))
973 return -EINVAL;
974
975 if (!(fd_file(f)->f_mode & FMODE_WRITE) ||
976 !(fd_file(f)->f_mode & FMODE_READ) ||
977 (fd_file(f)->f_flags & O_APPEND))
978 return -EBADF;
979
980 CLASS(fd, tmp)((int)sxp->sx_fdtmp);
981 if (fd_empty(tmp))
982 return -EINVAL;
983
984 if (!(fd_file(tmp)->f_mode & FMODE_WRITE) ||
985 !(fd_file(tmp)->f_mode & FMODE_READ) ||
986 (fd_file(tmp)->f_flags & O_APPEND))
987 return -EBADF;
988
989 if (IS_SWAPFILE(file_inode(fd_file(f))) ||
990 IS_SWAPFILE(file_inode(fd_file(tmp))))
991 return -EINVAL;
992
993 /*
994 * We need to ensure that the fds passed in point to XFS inodes
995 * before we cast and access them as XFS structures as we have no
996 * control over what the user passes us here.
997 */
998 if (fd_file(f)->f_op != &xfs_file_operations ||
999 fd_file(tmp)->f_op != &xfs_file_operations)
1000 return -EINVAL;
1001
1002 ip = XFS_I(file_inode(fd_file(f)));
1003 tip = XFS_I(file_inode(fd_file(tmp)));
1004
1005 if (ip->i_mount != tip->i_mount)
1006 return -EINVAL;
1007
1008 if (I_INO(ip) == I_INO(tip))
1009 return -EINVAL;
1010
1011 if (xfs_is_shutdown(ip->i_mount))
1012 return -EIO;
1013
1014 return xfs_swap_extents(ip, tip, sxp);
1015 }
1016
1017 static int
xfs_ioc_getlabel(struct xfs_mount * mp,char __user * user_label)1018 xfs_ioc_getlabel(
1019 struct xfs_mount *mp,
1020 char __user *user_label)
1021 {
1022 struct xfs_sb *sbp = &mp->m_sb;
1023 char label[XFSLABEL_MAX + 1];
1024
1025 /* Paranoia */
1026 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1027
1028 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1029 spin_lock(&mp->m_sb_lock);
1030 memtostr_pad(label, sbp->sb_fname);
1031 spin_unlock(&mp->m_sb_lock);
1032
1033 if (copy_to_user(user_label, label, sizeof(label)))
1034 return -EFAULT;
1035 return 0;
1036 }
1037
1038 static int
xfs_ioc_setlabel(struct file * filp,struct xfs_mount * mp,char __user * newlabel)1039 xfs_ioc_setlabel(
1040 struct file *filp,
1041 struct xfs_mount *mp,
1042 char __user *newlabel)
1043 {
1044 struct xfs_sb *sbp = &mp->m_sb;
1045 char label[XFSLABEL_MAX + 1];
1046 size_t len;
1047 int error;
1048
1049 if (!capable(CAP_SYS_ADMIN))
1050 return -EPERM;
1051 /*
1052 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1053 * smaller, at 12 bytes. We copy one more to be sure we find the
1054 * (required) NULL character to test the incoming label length.
1055 * NB: The on disk label doesn't need to be null terminated.
1056 */
1057 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1058 return -EFAULT;
1059 len = strnlen(label, XFSLABEL_MAX + 1);
1060 if (len > sizeof(sbp->sb_fname))
1061 return -EINVAL;
1062
1063 error = mnt_want_write_file(filp);
1064 if (error)
1065 return error;
1066
1067 spin_lock(&mp->m_sb_lock);
1068 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1069 memcpy(sbp->sb_fname, label, len);
1070 spin_unlock(&mp->m_sb_lock);
1071
1072 /*
1073 * Now we do several things to satisfy userspace.
1074 * In addition to normal logging of the primary superblock, we also
1075 * immediately write these changes to sector zero for the primary, then
1076 * update all backup supers (as xfs_db does for a label change), then
1077 * invalidate the block device page cache. This is so that any prior
1078 * buffered reads from userspace (i.e. from blkid) are invalidated,
1079 * and userspace will see the newly-written label.
1080 */
1081 error = xfs_sync_sb_buf(mp, true);
1082 if (error)
1083 goto out;
1084 /*
1085 * growfs also updates backup supers so lock against that.
1086 */
1087 mutex_lock(&mp->m_growlock);
1088 error = xfs_update_secondary_sbs(mp);
1089 mutex_unlock(&mp->m_growlock);
1090
1091 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1092 if (xfs_has_rtsb(mp) && mp->m_rtdev_targp)
1093 invalidate_bdev(mp->m_rtdev_targp->bt_bdev);
1094
1095 out:
1096 mnt_drop_write_file(filp);
1097 return error;
1098 }
1099
1100 static inline int
xfs_fs_eofblocks_from_user(struct xfs_fs_eofblocks * src,struct xfs_icwalk * dst)1101 xfs_fs_eofblocks_from_user(
1102 struct xfs_fs_eofblocks *src,
1103 struct xfs_icwalk *dst)
1104 {
1105 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1106 return -EINVAL;
1107
1108 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1109 return -EINVAL;
1110
1111 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1112 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1113 return -EINVAL;
1114
1115 dst->icw_flags = 0;
1116 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1117 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1118 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1119 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1120 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1121 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1122 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1123 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1124 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1125 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1126
1127 dst->icw_prid = src->eof_prid;
1128 dst->icw_min_file_size = src->eof_min_file_size;
1129
1130 dst->icw_uid = INVALID_UID;
1131 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1132 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1133 if (!uid_valid(dst->icw_uid))
1134 return -EINVAL;
1135 }
1136
1137 dst->icw_gid = INVALID_GID;
1138 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1139 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1140 if (!gid_valid(dst->icw_gid))
1141 return -EINVAL;
1142 }
1143 return 0;
1144 }
1145
1146 static int
xfs_ioctl_getset_resblocks(struct file * filp,unsigned int cmd,void __user * arg)1147 xfs_ioctl_getset_resblocks(
1148 struct file *filp,
1149 unsigned int cmd,
1150 void __user *arg)
1151 {
1152 struct xfs_mount *mp = XFS_I(file_inode(filp))->i_mount;
1153 struct xfs_fsop_resblks fsop = { };
1154 int error;
1155
1156 if (!capable(CAP_SYS_ADMIN))
1157 return -EPERM;
1158
1159 if (cmd == XFS_IOC_SET_RESBLKS) {
1160 if (xfs_is_readonly(mp))
1161 return -EROFS;
1162
1163 if (copy_from_user(&fsop, arg, sizeof(fsop)))
1164 return -EFAULT;
1165
1166 error = mnt_want_write_file(filp);
1167 if (error)
1168 return error;
1169 error = xfs_reserve_blocks(mp, XC_FREE_BLOCKS, fsop.resblks);
1170 mnt_drop_write_file(filp);
1171 if (error)
1172 return error;
1173 }
1174
1175 spin_lock(&mp->m_sb_lock);
1176 fsop.resblks = mp->m_free[XC_FREE_BLOCKS].res_total;
1177 fsop.resblks_avail = mp->m_free[XC_FREE_BLOCKS].res_avail;
1178 spin_unlock(&mp->m_sb_lock);
1179
1180 if (copy_to_user(arg, &fsop, sizeof(fsop)))
1181 return -EFAULT;
1182 return 0;
1183 }
1184
1185 static int
xfs_ioctl_fs_counts(struct xfs_mount * mp,struct xfs_fsop_counts __user * uarg)1186 xfs_ioctl_fs_counts(
1187 struct xfs_mount *mp,
1188 struct xfs_fsop_counts __user *uarg)
1189 {
1190 struct xfs_fsop_counts out = {
1191 .allocino = percpu_counter_read_positive(&mp->m_icount),
1192 .freeino = percpu_counter_read_positive(&mp->m_ifree),
1193 .freedata = xfs_estimate_freecounter(mp, XC_FREE_BLOCKS) -
1194 xfs_freecounter_unavailable(mp, XC_FREE_BLOCKS),
1195 .freertx = xfs_estimate_freecounter(mp, XC_FREE_RTEXTENTS),
1196 };
1197
1198 if (copy_to_user(uarg, &out, sizeof(out)))
1199 return -EFAULT;
1200 return 0;
1201 }
1202
1203 /*
1204 * These long-unused ioctls were removed from the official ioctl API in 5.17,
1205 * but retain these definitions so that we can log warnings about them.
1206 */
1207 #define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
1208 #define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
1209 #define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
1210 #define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
1211
1212 /*
1213 * Note: some of the ioctl's return positive numbers as a
1214 * byte count indicating success, such as readlink_by_handle.
1215 * So we don't "sign flip" like most other routines. This means
1216 * true errors need to be returned as a negative value.
1217 */
1218 long
xfs_file_ioctl(struct file * filp,unsigned int cmd,unsigned long p)1219 xfs_file_ioctl(
1220 struct file *filp,
1221 unsigned int cmd,
1222 unsigned long p)
1223 {
1224 struct inode *inode = file_inode(filp);
1225 struct xfs_inode *ip = XFS_I(inode);
1226 struct xfs_mount *mp = ip->i_mount;
1227 void __user *arg = (void __user *)p;
1228 int error;
1229
1230 trace_xfs_file_ioctl(ip);
1231
1232 switch (cmd) {
1233 case FITRIM:
1234 return xfs_ioc_trim(mp, arg);
1235 case FS_IOC_GETFSLABEL:
1236 return xfs_ioc_getlabel(mp, arg);
1237 case FS_IOC_SETFSLABEL:
1238 return xfs_ioc_setlabel(filp, mp, arg);
1239 case XFS_IOC_ALLOCSP:
1240 case XFS_IOC_FREESP:
1241 case XFS_IOC_ALLOCSP64:
1242 case XFS_IOC_FREESP64:
1243 xfs_warn_once(mp,
1244 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
1245 current->comm);
1246 return -ENOTTY;
1247 case XFS_IOC_DIOINFO: {
1248 struct kstat st;
1249 struct dioattr da;
1250
1251 error = vfs_getattr(&filp->f_path, &st, STATX_DIOALIGN, 0);
1252 if (error)
1253 return error;
1254
1255 /*
1256 * Some userspace directly feeds the return value to
1257 * posix_memalign, which fails for values that are smaller than
1258 * the pointer size. Round up the value to not break userspace.
1259 */
1260 da.d_mem = roundup(st.dio_mem_align, sizeof(void *));
1261 da.d_miniosz = st.dio_offset_align;
1262 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1263 if (copy_to_user(arg, &da, sizeof(da)))
1264 return -EFAULT;
1265 return 0;
1266 }
1267
1268 case XFS_IOC_FSBULKSTAT_SINGLE:
1269 case XFS_IOC_FSBULKSTAT:
1270 case XFS_IOC_FSINUMBERS:
1271 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1272
1273 case XFS_IOC_BULKSTAT:
1274 return xfs_ioc_bulkstat(filp, cmd, arg);
1275 case XFS_IOC_INUMBERS:
1276 return xfs_ioc_inumbers(mp, cmd, arg);
1277
1278 case XFS_IOC_FSGEOMETRY_V1:
1279 return xfs_ioc_fsgeometry(mp, arg, 3);
1280 case XFS_IOC_FSGEOMETRY_V4:
1281 return xfs_ioc_fsgeometry(mp, arg, 4);
1282 case XFS_IOC_FSGEOMETRY:
1283 return xfs_ioc_fsgeometry(mp, arg, 5);
1284
1285 case XFS_IOC_AG_GEOMETRY:
1286 return xfs_ioc_ag_geometry(mp, arg);
1287 case XFS_IOC_RTGROUP_GEOMETRY:
1288 return xfs_ioc_rtgroup_geometry(mp, arg);
1289
1290 case XFS_IOC_GETVERSION:
1291 return put_user(inode->i_generation, (int __user *)arg);
1292
1293 case XFS_IOC_FSGETXATTRA:
1294 return xfs_ioc_fsgetxattra(ip, arg);
1295 case XFS_IOC_GETPARENTS:
1296 return xfs_ioc_getparents(filp, arg);
1297 case XFS_IOC_GETPARENTS_BY_HANDLE:
1298 return xfs_ioc_getparents_by_handle(filp, arg);
1299 case XFS_IOC_GETBMAP:
1300 case XFS_IOC_GETBMAPA:
1301 case XFS_IOC_GETBMAPX:
1302 return xfs_ioc_getbmap(filp, cmd, arg);
1303
1304 case FS_IOC_GETFSMAP:
1305 return xfs_ioc_getfsmap(ip, arg);
1306
1307 case XFS_IOC_SCRUBV_METADATA:
1308 return xfs_ioc_scrubv_metadata(filp, arg);
1309 case XFS_IOC_SCRUB_METADATA:
1310 return xfs_ioc_scrub_metadata(filp, arg);
1311
1312 case XFS_IOC_FD_TO_HANDLE:
1313 case XFS_IOC_PATH_TO_HANDLE:
1314 case XFS_IOC_PATH_TO_FSHANDLE: {
1315 xfs_fsop_handlereq_t hreq;
1316
1317 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1318 return -EFAULT;
1319 return xfs_find_handle(cmd, &hreq);
1320 }
1321 case XFS_IOC_OPEN_BY_HANDLE: {
1322 xfs_fsop_handlereq_t hreq;
1323
1324 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1325 return -EFAULT;
1326 return xfs_open_by_handle(filp, &hreq);
1327 }
1328
1329 case XFS_IOC_READLINK_BY_HANDLE: {
1330 xfs_fsop_handlereq_t hreq;
1331
1332 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1333 return -EFAULT;
1334 return xfs_readlink_by_handle(filp, &hreq);
1335 }
1336 case XFS_IOC_ATTRLIST_BY_HANDLE:
1337 return xfs_attrlist_by_handle(filp, arg);
1338
1339 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1340 return xfs_attrmulti_by_handle(filp, arg);
1341
1342 case XFS_IOC_SWAPEXT: {
1343 struct xfs_swapext sxp;
1344
1345 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1346 return -EFAULT;
1347 error = mnt_want_write_file(filp);
1348 if (error)
1349 return error;
1350 error = xfs_ioc_swapext(&sxp);
1351 mnt_drop_write_file(filp);
1352 return error;
1353 }
1354
1355 case XFS_IOC_FSCOUNTS:
1356 return xfs_ioctl_fs_counts(mp, arg);
1357
1358 case XFS_IOC_SET_RESBLKS:
1359 case XFS_IOC_GET_RESBLKS:
1360 return xfs_ioctl_getset_resblocks(filp, cmd, arg);
1361
1362 case XFS_IOC_FSGROWFSDATA: {
1363 struct xfs_growfs_data in;
1364
1365 if (copy_from_user(&in, arg, sizeof(in)))
1366 return -EFAULT;
1367
1368 error = mnt_want_write_file(filp);
1369 if (error)
1370 return error;
1371 error = xfs_growfs_data(mp, &in);
1372 mnt_drop_write_file(filp);
1373 return error;
1374 }
1375
1376 case XFS_IOC_FSGROWFSLOG: {
1377 struct xfs_growfs_log in;
1378
1379 if (copy_from_user(&in, arg, sizeof(in)))
1380 return -EFAULT;
1381
1382 error = mnt_want_write_file(filp);
1383 if (error)
1384 return error;
1385 error = xfs_growfs_log(mp, &in);
1386 mnt_drop_write_file(filp);
1387 return error;
1388 }
1389
1390 case XFS_IOC_FSGROWFSRT: {
1391 xfs_growfs_rt_t in;
1392
1393 if (copy_from_user(&in, arg, sizeof(in)))
1394 return -EFAULT;
1395
1396 error = mnt_want_write_file(filp);
1397 if (error)
1398 return error;
1399 error = xfs_growfs_rt(mp, &in);
1400 mnt_drop_write_file(filp);
1401 return error;
1402 }
1403
1404 case XFS_IOC_GOINGDOWN: {
1405 uint32_t in;
1406
1407 if (!capable(CAP_SYS_ADMIN))
1408 return -EPERM;
1409
1410 if (get_user(in, (uint32_t __user *)arg))
1411 return -EFAULT;
1412
1413 return xfs_fs_goingdown(mp, in);
1414 }
1415
1416 case XFS_IOC_ERROR_INJECTION: {
1417 xfs_error_injection_t in;
1418
1419 if (!capable(CAP_SYS_ADMIN))
1420 return -EPERM;
1421
1422 if (copy_from_user(&in, arg, sizeof(in)))
1423 return -EFAULT;
1424
1425 return xfs_errortag_add(mp, in.errtag);
1426 }
1427
1428 case XFS_IOC_ERROR_CLEARALL:
1429 if (!capable(CAP_SYS_ADMIN))
1430 return -EPERM;
1431
1432 return xfs_errortag_clearall(mp);
1433
1434 case XFS_IOC_FREE_EOFBLOCKS: {
1435 struct xfs_fs_eofblocks eofb;
1436 struct xfs_icwalk icw;
1437
1438 if (!capable(CAP_SYS_ADMIN))
1439 return -EPERM;
1440
1441 if (xfs_is_readonly(mp))
1442 return -EROFS;
1443
1444 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1445 return -EFAULT;
1446
1447 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
1448 if (error)
1449 return error;
1450
1451 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
1452
1453 guard(super_write)(mp->m_super);
1454 return xfs_blockgc_free_space(mp, &icw);
1455 }
1456
1457 case XFS_IOC_EXCHANGE_RANGE:
1458 return xfs_ioc_exchange_range(filp, arg);
1459 case XFS_IOC_START_COMMIT:
1460 return xfs_ioc_start_commit(filp, arg);
1461 case XFS_IOC_COMMIT_RANGE:
1462 return xfs_ioc_commit_range(filp, arg);
1463
1464 case XFS_IOC_HEALTH_MONITOR:
1465 return xfs_ioc_health_monitor(filp, arg);
1466 case XFS_IOC_VERIFY_MEDIA:
1467 return xfs_ioc_verify_media(filp, arg);
1468
1469 default:
1470 return -ENOTTY;
1471 }
1472 }
1473