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xfs: disable per-inode DAX flag
[mirror_ubuntu-artful-kernel.git] / fs / xfs / xfs_ioctl.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_inode.h"
26 #include "xfs_ioctl.h"
27 #include "xfs_alloc.h"
28 #include "xfs_rtalloc.h"
29 #include "xfs_itable.h"
30 #include "xfs_error.h"
31 #include "xfs_attr.h"
32 #include "xfs_bmap.h"
33 #include "xfs_bmap_util.h"
34 #include "xfs_fsops.h"
35 #include "xfs_discard.h"
36 #include "xfs_quota.h"
37 #include "xfs_export.h"
38 #include "xfs_trace.h"
39 #include "xfs_icache.h"
40 #include "xfs_symlink.h"
41 #include "xfs_trans.h"
42 #include "xfs_pnfs.h"
43 #include "xfs_acl.h"
44 #include "xfs_btree.h"
45 #include <linux/fsmap.h>
46 #include "xfs_fsmap.h"
47
48 #include <linux/capability.h>
49 #include <linux/cred.h>
50 #include <linux/dcache.h>
51 #include <linux/mount.h>
52 #include <linux/namei.h>
53 #include <linux/pagemap.h>
54 #include <linux/slab.h>
55 #include <linux/exportfs.h>
56
57 /*
58 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
59 * a file or fs handle.
60 *
61 * XFS_IOC_PATH_TO_FSHANDLE
62 * returns fs handle for a mount point or path within that mount point
63 * XFS_IOC_FD_TO_HANDLE
64 * returns full handle for a FD opened in user space
65 * XFS_IOC_PATH_TO_HANDLE
66 * returns full handle for a path
67 */
68 int
69 xfs_find_handle(
70 unsigned int cmd,
71 xfs_fsop_handlereq_t *hreq)
72 {
73 int hsize;
74 xfs_handle_t handle;
75 struct inode *inode;
76 struct fd f = {NULL};
77 struct path path;
78 int error;
79 struct xfs_inode *ip;
80
81 if (cmd == XFS_IOC_FD_TO_HANDLE) {
82 f = fdget(hreq->fd);
83 if (!f.file)
84 return -EBADF;
85 inode = file_inode(f.file);
86 } else {
87 error = user_lpath((const char __user *)hreq->path, &path);
88 if (error)
89 return error;
90 inode = d_inode(path.dentry);
91 }
92 ip = XFS_I(inode);
93
94 /*
95 * We can only generate handles for inodes residing on a XFS filesystem,
96 * and only for regular files, directories or symbolic links.
97 */
98 error = -EINVAL;
99 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
100 goto out_put;
101
102 error = -EBADF;
103 if (!S_ISREG(inode->i_mode) &&
104 !S_ISDIR(inode->i_mode) &&
105 !S_ISLNK(inode->i_mode))
106 goto out_put;
107
108
109 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
110
111 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
112 /*
113 * This handle only contains an fsid, zero the rest.
114 */
115 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
116 hsize = sizeof(xfs_fsid_t);
117 } else {
118 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
119 sizeof(handle.ha_fid.fid_len);
120 handle.ha_fid.fid_pad = 0;
121 handle.ha_fid.fid_gen = inode->i_generation;
122 handle.ha_fid.fid_ino = ip->i_ino;
123 hsize = sizeof(xfs_handle_t);
124 }
125
126 error = -EFAULT;
127 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
128 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
129 goto out_put;
130
131 error = 0;
132
133 out_put:
134 if (cmd == XFS_IOC_FD_TO_HANDLE)
135 fdput(f);
136 else
137 path_put(&path);
138 return error;
139 }
140
141 /*
142 * No need to do permission checks on the various pathname components
143 * as the handle operations are privileged.
144 */
145 STATIC int
146 xfs_handle_acceptable(
147 void *context,
148 struct dentry *dentry)
149 {
150 return 1;
151 }
152
153 /*
154 * Convert userspace handle data into a dentry.
155 */
156 struct dentry *
157 xfs_handle_to_dentry(
158 struct file *parfilp,
159 void __user *uhandle,
160 u32 hlen)
161 {
162 xfs_handle_t handle;
163 struct xfs_fid64 fid;
164
165 /*
166 * Only allow handle opens under a directory.
167 */
168 if (!S_ISDIR(file_inode(parfilp)->i_mode))
169 return ERR_PTR(-ENOTDIR);
170
171 if (hlen != sizeof(xfs_handle_t))
172 return ERR_PTR(-EINVAL);
173 if (copy_from_user(&handle, uhandle, hlen))
174 return ERR_PTR(-EFAULT);
175 if (handle.ha_fid.fid_len !=
176 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
177 return ERR_PTR(-EINVAL);
178
179 memset(&fid, 0, sizeof(struct fid));
180 fid.ino = handle.ha_fid.fid_ino;
181 fid.gen = handle.ha_fid.fid_gen;
182
183 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
184 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
185 xfs_handle_acceptable, NULL);
186 }
187
188 STATIC struct dentry *
189 xfs_handlereq_to_dentry(
190 struct file *parfilp,
191 xfs_fsop_handlereq_t *hreq)
192 {
193 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
194 }
195
196 int
197 xfs_open_by_handle(
198 struct file *parfilp,
199 xfs_fsop_handlereq_t *hreq)
200 {
201 const struct cred *cred = current_cred();
202 int error;
203 int fd;
204 int permflag;
205 struct file *filp;
206 struct inode *inode;
207 struct dentry *dentry;
208 fmode_t fmode;
209 struct path path;
210
211 if (!capable(CAP_SYS_ADMIN))
212 return -EPERM;
213
214 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
215 if (IS_ERR(dentry))
216 return PTR_ERR(dentry);
217 inode = d_inode(dentry);
218
219 /* Restrict xfs_open_by_handle to directories & regular files. */
220 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
221 error = -EPERM;
222 goto out_dput;
223 }
224
225 #if BITS_PER_LONG != 32
226 hreq->oflags |= O_LARGEFILE;
227 #endif
228
229 permflag = hreq->oflags;
230 fmode = OPEN_FMODE(permflag);
231 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
232 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
233 error = -EPERM;
234 goto out_dput;
235 }
236
237 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
238 error = -EPERM;
239 goto out_dput;
240 }
241
242 /* Can't write directories. */
243 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
244 error = -EISDIR;
245 goto out_dput;
246 }
247
248 fd = get_unused_fd_flags(0);
249 if (fd < 0) {
250 error = fd;
251 goto out_dput;
252 }
253
254 path.mnt = parfilp->f_path.mnt;
255 path.dentry = dentry;
256 filp = dentry_open(&path, hreq->oflags, cred);
257 dput(dentry);
258 if (IS_ERR(filp)) {
259 put_unused_fd(fd);
260 return PTR_ERR(filp);
261 }
262
263 if (S_ISREG(inode->i_mode)) {
264 filp->f_flags |= O_NOATIME;
265 filp->f_mode |= FMODE_NOCMTIME;
266 }
267
268 fd_install(fd, filp);
269 return fd;
270
271 out_dput:
272 dput(dentry);
273 return error;
274 }
275
276 int
277 xfs_readlink_by_handle(
278 struct file *parfilp,
279 xfs_fsop_handlereq_t *hreq)
280 {
281 struct dentry *dentry;
282 __u32 olen;
283 int error;
284
285 if (!capable(CAP_SYS_ADMIN))
286 return -EPERM;
287
288 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
289 if (IS_ERR(dentry))
290 return PTR_ERR(dentry);
291
292 /* Restrict this handle operation to symlinks only. */
293 if (!d_is_symlink(dentry)) {
294 error = -EINVAL;
295 goto out_dput;
296 }
297
298 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
299 error = -EFAULT;
300 goto out_dput;
301 }
302
303 error = vfs_readlink(dentry, hreq->ohandle, olen);
304
305 out_dput:
306 dput(dentry);
307 return error;
308 }
309
310 int
311 xfs_set_dmattrs(
312 xfs_inode_t *ip,
313 u_int evmask,
314 u_int16_t state)
315 {
316 xfs_mount_t *mp = ip->i_mount;
317 xfs_trans_t *tp;
318 int error;
319
320 if (!capable(CAP_SYS_ADMIN))
321 return -EPERM;
322
323 if (XFS_FORCED_SHUTDOWN(mp))
324 return -EIO;
325
326 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
327 if (error)
328 return error;
329
330 xfs_ilock(ip, XFS_ILOCK_EXCL);
331 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
332
333 ip->i_d.di_dmevmask = evmask;
334 ip->i_d.di_dmstate = state;
335
336 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
337 error = xfs_trans_commit(tp);
338
339 return error;
340 }
341
342 STATIC int
343 xfs_fssetdm_by_handle(
344 struct file *parfilp,
345 void __user *arg)
346 {
347 int error;
348 struct fsdmidata fsd;
349 xfs_fsop_setdm_handlereq_t dmhreq;
350 struct dentry *dentry;
351
352 if (!capable(CAP_MKNOD))
353 return -EPERM;
354 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
355 return -EFAULT;
356
357 error = mnt_want_write_file(parfilp);
358 if (error)
359 return error;
360
361 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
362 if (IS_ERR(dentry)) {
363 mnt_drop_write_file(parfilp);
364 return PTR_ERR(dentry);
365 }
366
367 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
368 error = -EPERM;
369 goto out;
370 }
371
372 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
373 error = -EFAULT;
374 goto out;
375 }
376
377 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
378 fsd.fsd_dmstate);
379
380 out:
381 mnt_drop_write_file(parfilp);
382 dput(dentry);
383 return error;
384 }
385
386 STATIC int
387 xfs_attrlist_by_handle(
388 struct file *parfilp,
389 void __user *arg)
390 {
391 int error = -ENOMEM;
392 attrlist_cursor_kern_t *cursor;
393 struct xfs_fsop_attrlist_handlereq __user *p = arg;
394 xfs_fsop_attrlist_handlereq_t al_hreq;
395 struct dentry *dentry;
396 char *kbuf;
397
398 if (!capable(CAP_SYS_ADMIN))
399 return -EPERM;
400 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
401 return -EFAULT;
402 if (al_hreq.buflen < sizeof(struct attrlist) ||
403 al_hreq.buflen > XFS_XATTR_LIST_MAX)
404 return -EINVAL;
405
406 /*
407 * Reject flags, only allow namespaces.
408 */
409 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
410 return -EINVAL;
411
412 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
413 if (IS_ERR(dentry))
414 return PTR_ERR(dentry);
415
416 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
417 if (!kbuf)
418 goto out_dput;
419
420 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
421 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
422 al_hreq.flags, cursor);
423 if (error)
424 goto out_kfree;
425
426 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
427 error = -EFAULT;
428 goto out_kfree;
429 }
430
431 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
432 error = -EFAULT;
433
434 out_kfree:
435 kmem_free(kbuf);
436 out_dput:
437 dput(dentry);
438 return error;
439 }
440
441 int
442 xfs_attrmulti_attr_get(
443 struct inode *inode,
444 unsigned char *name,
445 unsigned char __user *ubuf,
446 uint32_t *len,
447 uint32_t flags)
448 {
449 unsigned char *kbuf;
450 int error = -EFAULT;
451
452 if (*len > XFS_XATTR_SIZE_MAX)
453 return -EINVAL;
454 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
455 if (!kbuf)
456 return -ENOMEM;
457
458 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
459 if (error)
460 goto out_kfree;
461
462 if (copy_to_user(ubuf, kbuf, *len))
463 error = -EFAULT;
464
465 out_kfree:
466 kmem_free(kbuf);
467 return error;
468 }
469
470 int
471 xfs_attrmulti_attr_set(
472 struct inode *inode,
473 unsigned char *name,
474 const unsigned char __user *ubuf,
475 uint32_t len,
476 uint32_t flags)
477 {
478 unsigned char *kbuf;
479 int error;
480
481 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
482 return -EPERM;
483 if (len > XFS_XATTR_SIZE_MAX)
484 return -EINVAL;
485
486 kbuf = memdup_user(ubuf, len);
487 if (IS_ERR(kbuf))
488 return PTR_ERR(kbuf);
489
490 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
491 if (!error)
492 xfs_forget_acl(inode, name, flags);
493 kfree(kbuf);
494 return error;
495 }
496
497 int
498 xfs_attrmulti_attr_remove(
499 struct inode *inode,
500 unsigned char *name,
501 uint32_t flags)
502 {
503 int error;
504
505 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
506 return -EPERM;
507 error = xfs_attr_remove(XFS_I(inode), name, flags);
508 if (!error)
509 xfs_forget_acl(inode, name, flags);
510 return error;
511 }
512
513 STATIC int
514 xfs_attrmulti_by_handle(
515 struct file *parfilp,
516 void __user *arg)
517 {
518 int error;
519 xfs_attr_multiop_t *ops;
520 xfs_fsop_attrmulti_handlereq_t am_hreq;
521 struct dentry *dentry;
522 unsigned int i, size;
523 unsigned char *attr_name;
524
525 if (!capable(CAP_SYS_ADMIN))
526 return -EPERM;
527 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
528 return -EFAULT;
529
530 /* overflow check */
531 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
532 return -E2BIG;
533
534 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
535 if (IS_ERR(dentry))
536 return PTR_ERR(dentry);
537
538 error = -E2BIG;
539 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
540 if (!size || size > 16 * PAGE_SIZE)
541 goto out_dput;
542
543 ops = memdup_user(am_hreq.ops, size);
544 if (IS_ERR(ops)) {
545 error = PTR_ERR(ops);
546 goto out_dput;
547 }
548
549 error = -ENOMEM;
550 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
551 if (!attr_name)
552 goto out_kfree_ops;
553
554 error = 0;
555 for (i = 0; i < am_hreq.opcount; i++) {
556 ops[i].am_error = strncpy_from_user((char *)attr_name,
557 ops[i].am_attrname, MAXNAMELEN);
558 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
559 error = -ERANGE;
560 if (ops[i].am_error < 0)
561 break;
562
563 switch (ops[i].am_opcode) {
564 case ATTR_OP_GET:
565 ops[i].am_error = xfs_attrmulti_attr_get(
566 d_inode(dentry), attr_name,
567 ops[i].am_attrvalue, &ops[i].am_length,
568 ops[i].am_flags);
569 break;
570 case ATTR_OP_SET:
571 ops[i].am_error = mnt_want_write_file(parfilp);
572 if (ops[i].am_error)
573 break;
574 ops[i].am_error = xfs_attrmulti_attr_set(
575 d_inode(dentry), attr_name,
576 ops[i].am_attrvalue, ops[i].am_length,
577 ops[i].am_flags);
578 mnt_drop_write_file(parfilp);
579 break;
580 case ATTR_OP_REMOVE:
581 ops[i].am_error = mnt_want_write_file(parfilp);
582 if (ops[i].am_error)
583 break;
584 ops[i].am_error = xfs_attrmulti_attr_remove(
585 d_inode(dentry), attr_name,
586 ops[i].am_flags);
587 mnt_drop_write_file(parfilp);
588 break;
589 default:
590 ops[i].am_error = -EINVAL;
591 }
592 }
593
594 if (copy_to_user(am_hreq.ops, ops, size))
595 error = -EFAULT;
596
597 kfree(attr_name);
598 out_kfree_ops:
599 kfree(ops);
600 out_dput:
601 dput(dentry);
602 return error;
603 }
604
605 int
606 xfs_ioc_space(
607 struct file *filp,
608 unsigned int cmd,
609 xfs_flock64_t *bf)
610 {
611 struct inode *inode = file_inode(filp);
612 struct xfs_inode *ip = XFS_I(inode);
613 struct iattr iattr;
614 enum xfs_prealloc_flags flags = 0;
615 uint iolock = XFS_IOLOCK_EXCL;
616 int error;
617
618 /*
619 * Only allow the sys admin to reserve space unless
620 * unwritten extents are enabled.
621 */
622 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
623 !capable(CAP_SYS_ADMIN))
624 return -EPERM;
625
626 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
627 return -EPERM;
628
629 if (!(filp->f_mode & FMODE_WRITE))
630 return -EBADF;
631
632 if (!S_ISREG(inode->i_mode))
633 return -EINVAL;
634
635 if (filp->f_flags & O_DSYNC)
636 flags |= XFS_PREALLOC_SYNC;
637 if (filp->f_mode & FMODE_NOCMTIME)
638 flags |= XFS_PREALLOC_INVISIBLE;
639
640 error = mnt_want_write_file(filp);
641 if (error)
642 return error;
643
644 xfs_ilock(ip, iolock);
645 error = xfs_break_layouts(inode, &iolock);
646 if (error)
647 goto out_unlock;
648
649 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
650 iolock |= XFS_MMAPLOCK_EXCL;
651
652 switch (bf->l_whence) {
653 case 0: /*SEEK_SET*/
654 break;
655 case 1: /*SEEK_CUR*/
656 bf->l_start += filp->f_pos;
657 break;
658 case 2: /*SEEK_END*/
659 bf->l_start += XFS_ISIZE(ip);
660 break;
661 default:
662 error = -EINVAL;
663 goto out_unlock;
664 }
665
666 /*
667 * length of <= 0 for resv/unresv/zero is invalid. length for
668 * alloc/free is ignored completely and we have no idea what userspace
669 * might have set it to, so set it to zero to allow range
670 * checks to pass.
671 */
672 switch (cmd) {
673 case XFS_IOC_ZERO_RANGE:
674 case XFS_IOC_RESVSP:
675 case XFS_IOC_RESVSP64:
676 case XFS_IOC_UNRESVSP:
677 case XFS_IOC_UNRESVSP64:
678 if (bf->l_len <= 0) {
679 error = -EINVAL;
680 goto out_unlock;
681 }
682 break;
683 default:
684 bf->l_len = 0;
685 break;
686 }
687
688 if (bf->l_start < 0 ||
689 bf->l_start > inode->i_sb->s_maxbytes ||
690 bf->l_start + bf->l_len < 0 ||
691 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
692 error = -EINVAL;
693 goto out_unlock;
694 }
695
696 switch (cmd) {
697 case XFS_IOC_ZERO_RANGE:
698 flags |= XFS_PREALLOC_SET;
699 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
700 break;
701 case XFS_IOC_RESVSP:
702 case XFS_IOC_RESVSP64:
703 flags |= XFS_PREALLOC_SET;
704 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
705 XFS_BMAPI_PREALLOC);
706 break;
707 case XFS_IOC_UNRESVSP:
708 case XFS_IOC_UNRESVSP64:
709 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
710 break;
711 case XFS_IOC_ALLOCSP:
712 case XFS_IOC_ALLOCSP64:
713 case XFS_IOC_FREESP:
714 case XFS_IOC_FREESP64:
715 flags |= XFS_PREALLOC_CLEAR;
716 if (bf->l_start > XFS_ISIZE(ip)) {
717 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
718 bf->l_start - XFS_ISIZE(ip), 0);
719 if (error)
720 goto out_unlock;
721 }
722
723 iattr.ia_valid = ATTR_SIZE;
724 iattr.ia_size = bf->l_start;
725
726 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
727 break;
728 default:
729 ASSERT(0);
730 error = -EINVAL;
731 }
732
733 if (error)
734 goto out_unlock;
735
736 error = xfs_update_prealloc_flags(ip, flags);
737
738 out_unlock:
739 xfs_iunlock(ip, iolock);
740 mnt_drop_write_file(filp);
741 return error;
742 }
743
744 STATIC int
745 xfs_ioc_bulkstat(
746 xfs_mount_t *mp,
747 unsigned int cmd,
748 void __user *arg)
749 {
750 xfs_fsop_bulkreq_t bulkreq;
751 int count; /* # of records returned */
752 xfs_ino_t inlast; /* last inode number */
753 int done;
754 int error;
755
756 /* done = 1 if there are more stats to get and if bulkstat */
757 /* should be called again (unused here, but used in dmapi) */
758
759 if (!capable(CAP_SYS_ADMIN))
760 return -EPERM;
761
762 if (XFS_FORCED_SHUTDOWN(mp))
763 return -EIO;
764
765 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
766 return -EFAULT;
767
768 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
769 return -EFAULT;
770
771 if ((count = bulkreq.icount) <= 0)
772 return -EINVAL;
773
774 if (bulkreq.ubuffer == NULL)
775 return -EINVAL;
776
777 if (cmd == XFS_IOC_FSINUMBERS)
778 error = xfs_inumbers(mp, &inlast, &count,
779 bulkreq.ubuffer, xfs_inumbers_fmt);
780 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
781 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
782 sizeof(xfs_bstat_t), NULL, &done);
783 else /* XFS_IOC_FSBULKSTAT */
784 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
785 sizeof(xfs_bstat_t), bulkreq.ubuffer,
786 &done);
787
788 if (error)
789 return error;
790
791 if (bulkreq.ocount != NULL) {
792 if (copy_to_user(bulkreq.lastip, &inlast,
793 sizeof(xfs_ino_t)))
794 return -EFAULT;
795
796 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
797 return -EFAULT;
798 }
799
800 return 0;
801 }
802
803 STATIC int
804 xfs_ioc_fsgeometry_v1(
805 xfs_mount_t *mp,
806 void __user *arg)
807 {
808 xfs_fsop_geom_t fsgeo;
809 int error;
810
811 error = xfs_fs_geometry(mp, &fsgeo, 3);
812 if (error)
813 return error;
814
815 /*
816 * Caller should have passed an argument of type
817 * xfs_fsop_geom_v1_t. This is a proper subset of the
818 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
819 */
820 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
821 return -EFAULT;
822 return 0;
823 }
824
825 STATIC int
826 xfs_ioc_fsgeometry(
827 xfs_mount_t *mp,
828 void __user *arg)
829 {
830 xfs_fsop_geom_t fsgeo;
831 int error;
832
833 error = xfs_fs_geometry(mp, &fsgeo, 4);
834 if (error)
835 return error;
836
837 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
838 return -EFAULT;
839 return 0;
840 }
841
842 /*
843 * Linux extended inode flags interface.
844 */
845
846 STATIC unsigned int
847 xfs_merge_ioc_xflags(
848 unsigned int flags,
849 unsigned int start)
850 {
851 unsigned int xflags = start;
852
853 if (flags & FS_IMMUTABLE_FL)
854 xflags |= FS_XFLAG_IMMUTABLE;
855 else
856 xflags &= ~FS_XFLAG_IMMUTABLE;
857 if (flags & FS_APPEND_FL)
858 xflags |= FS_XFLAG_APPEND;
859 else
860 xflags &= ~FS_XFLAG_APPEND;
861 if (flags & FS_SYNC_FL)
862 xflags |= FS_XFLAG_SYNC;
863 else
864 xflags &= ~FS_XFLAG_SYNC;
865 if (flags & FS_NOATIME_FL)
866 xflags |= FS_XFLAG_NOATIME;
867 else
868 xflags &= ~FS_XFLAG_NOATIME;
869 if (flags & FS_NODUMP_FL)
870 xflags |= FS_XFLAG_NODUMP;
871 else
872 xflags &= ~FS_XFLAG_NODUMP;
873
874 return xflags;
875 }
876
877 STATIC unsigned int
878 xfs_di2lxflags(
879 uint16_t di_flags)
880 {
881 unsigned int flags = 0;
882
883 if (di_flags & XFS_DIFLAG_IMMUTABLE)
884 flags |= FS_IMMUTABLE_FL;
885 if (di_flags & XFS_DIFLAG_APPEND)
886 flags |= FS_APPEND_FL;
887 if (di_flags & XFS_DIFLAG_SYNC)
888 flags |= FS_SYNC_FL;
889 if (di_flags & XFS_DIFLAG_NOATIME)
890 flags |= FS_NOATIME_FL;
891 if (di_flags & XFS_DIFLAG_NODUMP)
892 flags |= FS_NODUMP_FL;
893 return flags;
894 }
895
896 STATIC int
897 xfs_ioc_fsgetxattr(
898 xfs_inode_t *ip,
899 int attr,
900 void __user *arg)
901 {
902 struct fsxattr fa;
903
904 memset(&fa, 0, sizeof(struct fsxattr));
905
906 xfs_ilock(ip, XFS_ILOCK_SHARED);
907 fa.fsx_xflags = xfs_ip2xflags(ip);
908 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
909 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
910 ip->i_mount->m_sb.sb_blocklog;
911 fa.fsx_projid = xfs_get_projid(ip);
912
913 if (attr) {
914 if (ip->i_afp) {
915 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
916 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
917 else
918 fa.fsx_nextents = ip->i_d.di_anextents;
919 } else
920 fa.fsx_nextents = 0;
921 } else {
922 if (ip->i_df.if_flags & XFS_IFEXTENTS)
923 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
924 else
925 fa.fsx_nextents = ip->i_d.di_nextents;
926 }
927 xfs_iunlock(ip, XFS_ILOCK_SHARED);
928
929 if (copy_to_user(arg, &fa, sizeof(fa)))
930 return -EFAULT;
931 return 0;
932 }
933
934 STATIC void
935 xfs_set_diflags(
936 struct xfs_inode *ip,
937 unsigned int xflags)
938 {
939 unsigned int di_flags;
940 uint64_t di_flags2;
941
942 /* can't set PREALLOC this way, just preserve it */
943 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
944 if (xflags & FS_XFLAG_IMMUTABLE)
945 di_flags |= XFS_DIFLAG_IMMUTABLE;
946 if (xflags & FS_XFLAG_APPEND)
947 di_flags |= XFS_DIFLAG_APPEND;
948 if (xflags & FS_XFLAG_SYNC)
949 di_flags |= XFS_DIFLAG_SYNC;
950 if (xflags & FS_XFLAG_NOATIME)
951 di_flags |= XFS_DIFLAG_NOATIME;
952 if (xflags & FS_XFLAG_NODUMP)
953 di_flags |= XFS_DIFLAG_NODUMP;
954 if (xflags & FS_XFLAG_NODEFRAG)
955 di_flags |= XFS_DIFLAG_NODEFRAG;
956 if (xflags & FS_XFLAG_FILESTREAM)
957 di_flags |= XFS_DIFLAG_FILESTREAM;
958 if (S_ISDIR(VFS_I(ip)->i_mode)) {
959 if (xflags & FS_XFLAG_RTINHERIT)
960 di_flags |= XFS_DIFLAG_RTINHERIT;
961 if (xflags & FS_XFLAG_NOSYMLINKS)
962 di_flags |= XFS_DIFLAG_NOSYMLINKS;
963 if (xflags & FS_XFLAG_EXTSZINHERIT)
964 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
965 if (xflags & FS_XFLAG_PROJINHERIT)
966 di_flags |= XFS_DIFLAG_PROJINHERIT;
967 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
968 if (xflags & FS_XFLAG_REALTIME)
969 di_flags |= XFS_DIFLAG_REALTIME;
970 if (xflags & FS_XFLAG_EXTSIZE)
971 di_flags |= XFS_DIFLAG_EXTSIZE;
972 }
973 ip->i_d.di_flags = di_flags;
974
975 /* diflags2 only valid for v3 inodes. */
976 if (ip->i_d.di_version < 3)
977 return;
978
979 di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
980 if (xflags & FS_XFLAG_DAX)
981 di_flags2 |= XFS_DIFLAG2_DAX;
982 if (xflags & FS_XFLAG_COWEXTSIZE)
983 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
984
985 ip->i_d.di_flags2 = di_flags2;
986 }
987
988 STATIC void
989 xfs_diflags_to_linux(
990 struct xfs_inode *ip)
991 {
992 struct inode *inode = VFS_I(ip);
993 unsigned int xflags = xfs_ip2xflags(ip);
994
995 if (xflags & FS_XFLAG_IMMUTABLE)
996 inode->i_flags |= S_IMMUTABLE;
997 else
998 inode->i_flags &= ~S_IMMUTABLE;
999 if (xflags & FS_XFLAG_APPEND)
1000 inode->i_flags |= S_APPEND;
1001 else
1002 inode->i_flags &= ~S_APPEND;
1003 if (xflags & FS_XFLAG_SYNC)
1004 inode->i_flags |= S_SYNC;
1005 else
1006 inode->i_flags &= ~S_SYNC;
1007 if (xflags & FS_XFLAG_NOATIME)
1008 inode->i_flags |= S_NOATIME;
1009 else
1010 inode->i_flags &= ~S_NOATIME;
1011 #if 0 /* disabled until the flag switching races are sorted out */
1012 if (xflags & FS_XFLAG_DAX)
1013 inode->i_flags |= S_DAX;
1014 else
1015 inode->i_flags &= ~S_DAX;
1016 #endif
1017 }
1018
1019 static int
1020 xfs_ioctl_setattr_xflags(
1021 struct xfs_trans *tp,
1022 struct xfs_inode *ip,
1023 struct fsxattr *fa)
1024 {
1025 struct xfs_mount *mp = ip->i_mount;
1026
1027 /* Can't change realtime flag if any extents are allocated. */
1028 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1029 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1030 return -EINVAL;
1031
1032 /* If realtime flag is set then must have realtime device */
1033 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1034 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1035 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1036 return -EINVAL;
1037 }
1038
1039 /* Clear reflink if we are actually able to set the rt flag. */
1040 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1041 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1042
1043 /* Don't allow us to set DAX mode for a reflinked file for now. */
1044 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1045 return -EINVAL;
1046
1047 /*
1048 * Can't modify an immutable/append-only file unless
1049 * we have appropriate permission.
1050 */
1051 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1052 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1053 !capable(CAP_LINUX_IMMUTABLE))
1054 return -EPERM;
1055
1056 xfs_set_diflags(ip, fa->fsx_xflags);
1057 xfs_diflags_to_linux(ip);
1058 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1059 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1060 XFS_STATS_INC(mp, xs_ig_attrchg);
1061 return 0;
1062 }
1063
1064 /*
1065 * If we are changing DAX flags, we have to ensure the file is clean and any
1066 * cached objects in the address space are invalidated and removed. This
1067 * requires us to lock out other IO and page faults similar to a truncate
1068 * operation. The locks need to be held until the transaction has been committed
1069 * so that the cache invalidation is atomic with respect to the DAX flag
1070 * manipulation.
1071 */
1072 static int
1073 xfs_ioctl_setattr_dax_invalidate(
1074 struct xfs_inode *ip,
1075 struct fsxattr *fa,
1076 int *join_flags)
1077 {
1078 struct inode *inode = VFS_I(ip);
1079 int error;
1080
1081 *join_flags = 0;
1082
1083 /*
1084 * It is only valid to set the DAX flag on regular files and
1085 * directories on filesystems where the block size is equal to the page
1086 * size. On directories it serves as an inherit hint.
1087 */
1088 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1089 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1090 return -EINVAL;
1091 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1092 return -EINVAL;
1093 }
1094
1095 /* If the DAX state is not changing, we have nothing to do here. */
1096 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1097 return 0;
1098 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1099 return 0;
1100
1101 /* lock, flush and invalidate mapping in preparation for flag change */
1102 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1103 error = filemap_write_and_wait(inode->i_mapping);
1104 if (error)
1105 goto out_unlock;
1106 error = invalidate_inode_pages2(inode->i_mapping);
1107 if (error)
1108 goto out_unlock;
1109
1110 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1111 return 0;
1112
1113 out_unlock:
1114 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1115 return error;
1116
1117 }
1118
1119 /*
1120 * Set up the transaction structure for the setattr operation, checking that we
1121 * have permission to do so. On success, return a clean transaction and the
1122 * inode locked exclusively ready for further operation specific checks. On
1123 * failure, return an error without modifying or locking the inode.
1124 *
1125 * The inode might already be IO locked on call. If this is the case, it is
1126 * indicated in @join_flags and we take full responsibility for ensuring they
1127 * are unlocked from now on. Hence if we have an error here, we still have to
1128 * unlock them. Otherwise, once they are joined to the transaction, they will
1129 * be unlocked on commit/cancel.
1130 */
1131 static struct xfs_trans *
1132 xfs_ioctl_setattr_get_trans(
1133 struct xfs_inode *ip,
1134 int join_flags)
1135 {
1136 struct xfs_mount *mp = ip->i_mount;
1137 struct xfs_trans *tp;
1138 int error = -EROFS;
1139
1140 if (mp->m_flags & XFS_MOUNT_RDONLY)
1141 goto out_unlock;
1142 error = -EIO;
1143 if (XFS_FORCED_SHUTDOWN(mp))
1144 goto out_unlock;
1145
1146 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1147 if (error)
1148 return ERR_PTR(error);
1149
1150 xfs_ilock(ip, XFS_ILOCK_EXCL);
1151 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1152 join_flags = 0;
1153
1154 /*
1155 * CAP_FOWNER overrides the following restrictions:
1156 *
1157 * The user ID of the calling process must be equal to the file owner
1158 * ID, except in cases where the CAP_FSETID capability is applicable.
1159 */
1160 if (!inode_owner_or_capable(VFS_I(ip))) {
1161 error = -EPERM;
1162 goto out_cancel;
1163 }
1164
1165 if (mp->m_flags & XFS_MOUNT_WSYNC)
1166 xfs_trans_set_sync(tp);
1167
1168 return tp;
1169
1170 out_cancel:
1171 xfs_trans_cancel(tp);
1172 out_unlock:
1173 if (join_flags)
1174 xfs_iunlock(ip, join_flags);
1175 return ERR_PTR(error);
1176 }
1177
1178 /*
1179 * extent size hint validation is somewhat cumbersome. Rules are:
1180 *
1181 * 1. extent size hint is only valid for directories and regular files
1182 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1183 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1184 * 4. can only be changed on regular files if no extents are allocated
1185 * 5. can be changed on directories at any time
1186 * 6. extsize hint of 0 turns off hints, clears inode flags.
1187 * 7. Extent size must be a multiple of the appropriate block size.
1188 * 8. for non-realtime files, the extent size hint must be limited
1189 * to half the AG size to avoid alignment extending the extent beyond the
1190 * limits of the AG.
1191 */
1192 static int
1193 xfs_ioctl_setattr_check_extsize(
1194 struct xfs_inode *ip,
1195 struct fsxattr *fa)
1196 {
1197 struct xfs_mount *mp = ip->i_mount;
1198
1199 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1200 return -EINVAL;
1201
1202 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1203 !S_ISDIR(VFS_I(ip)->i_mode))
1204 return -EINVAL;
1205
1206 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1207 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1208 return -EINVAL;
1209
1210 if (fa->fsx_extsize != 0) {
1211 xfs_extlen_t size;
1212 xfs_fsblock_t extsize_fsb;
1213
1214 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1215 if (extsize_fsb > MAXEXTLEN)
1216 return -EINVAL;
1217
1218 if (XFS_IS_REALTIME_INODE(ip) ||
1219 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1220 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1221 } else {
1222 size = mp->m_sb.sb_blocksize;
1223 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1224 return -EINVAL;
1225 }
1226
1227 if (fa->fsx_extsize % size)
1228 return -EINVAL;
1229 } else
1230 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1231
1232 return 0;
1233 }
1234
1235 /*
1236 * CoW extent size hint validation rules are:
1237 *
1238 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1239 * The inode does not have to have any shared blocks, but it must be a v3.
1240 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1241 * for a directory, the hint is propagated to new files.
1242 * 3. Can be changed on files & directories at any time.
1243 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1244 * 5. Extent size must be a multiple of the appropriate block size.
1245 * 6. The extent size hint must be limited to half the AG size to avoid
1246 * alignment extending the extent beyond the limits of the AG.
1247 */
1248 static int
1249 xfs_ioctl_setattr_check_cowextsize(
1250 struct xfs_inode *ip,
1251 struct fsxattr *fa)
1252 {
1253 struct xfs_mount *mp = ip->i_mount;
1254
1255 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1256 return 0;
1257
1258 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1259 ip->i_d.di_version != 3)
1260 return -EINVAL;
1261
1262 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1263 return -EINVAL;
1264
1265 if (fa->fsx_cowextsize != 0) {
1266 xfs_extlen_t size;
1267 xfs_fsblock_t cowextsize_fsb;
1268
1269 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1270 if (cowextsize_fsb > MAXEXTLEN)
1271 return -EINVAL;
1272
1273 size = mp->m_sb.sb_blocksize;
1274 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1275 return -EINVAL;
1276
1277 if (fa->fsx_cowextsize % size)
1278 return -EINVAL;
1279 } else
1280 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1281
1282 return 0;
1283 }
1284
1285 static int
1286 xfs_ioctl_setattr_check_projid(
1287 struct xfs_inode *ip,
1288 struct fsxattr *fa)
1289 {
1290 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1291 if (fa->fsx_projid > (uint16_t)-1 &&
1292 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1293 return -EINVAL;
1294
1295 /*
1296 * Project Quota ID state is only allowed to change from within the init
1297 * namespace. Enforce that restriction only if we are trying to change
1298 * the quota ID state. Everything else is allowed in user namespaces.
1299 */
1300 if (current_user_ns() == &init_user_ns)
1301 return 0;
1302
1303 if (xfs_get_projid(ip) != fa->fsx_projid)
1304 return -EINVAL;
1305 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1306 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1307 return -EINVAL;
1308
1309 return 0;
1310 }
1311
1312 STATIC int
1313 xfs_ioctl_setattr(
1314 xfs_inode_t *ip,
1315 struct fsxattr *fa)
1316 {
1317 struct xfs_mount *mp = ip->i_mount;
1318 struct xfs_trans *tp;
1319 struct xfs_dquot *udqp = NULL;
1320 struct xfs_dquot *pdqp = NULL;
1321 struct xfs_dquot *olddquot = NULL;
1322 int code;
1323 int join_flags = 0;
1324
1325 trace_xfs_ioctl_setattr(ip);
1326
1327 code = xfs_ioctl_setattr_check_projid(ip, fa);
1328 if (code)
1329 return code;
1330
1331 /*
1332 * If disk quotas is on, we make sure that the dquots do exist on disk,
1333 * before we start any other transactions. Trying to do this later
1334 * is messy. We don't care to take a readlock to look at the ids
1335 * in inode here, because we can't hold it across the trans_reserve.
1336 * If the IDs do change before we take the ilock, we're covered
1337 * because the i_*dquot fields will get updated anyway.
1338 */
1339 if (XFS_IS_QUOTA_ON(mp)) {
1340 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1341 ip->i_d.di_gid, fa->fsx_projid,
1342 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1343 if (code)
1344 return code;
1345 }
1346
1347 /*
1348 * Changing DAX config may require inode locking for mapping
1349 * invalidation. These need to be held all the way to transaction commit
1350 * or cancel time, so need to be passed through to
1351 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1352 * appropriately.
1353 */
1354 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1355 if (code)
1356 goto error_free_dquots;
1357
1358 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1359 if (IS_ERR(tp)) {
1360 code = PTR_ERR(tp);
1361 goto error_free_dquots;
1362 }
1363
1364
1365 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1366 xfs_get_projid(ip) != fa->fsx_projid) {
1367 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1368 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1369 if (code) /* out of quota */
1370 goto error_trans_cancel;
1371 }
1372
1373 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1374 if (code)
1375 goto error_trans_cancel;
1376
1377 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1378 if (code)
1379 goto error_trans_cancel;
1380
1381 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1382 if (code)
1383 goto error_trans_cancel;
1384
1385 /*
1386 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1387 * overrides the following restrictions:
1388 *
1389 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1390 * successful return from chown()
1391 */
1392
1393 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1394 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1395 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1396
1397 /* Change the ownerships and register project quota modifications */
1398 if (xfs_get_projid(ip) != fa->fsx_projid) {
1399 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1400 olddquot = xfs_qm_vop_chown(tp, ip,
1401 &ip->i_pdquot, pdqp);
1402 }
1403 ASSERT(ip->i_d.di_version > 1);
1404 xfs_set_projid(ip, fa->fsx_projid);
1405 }
1406
1407 /*
1408 * Only set the extent size hint if we've already determined that the
1409 * extent size hint should be set on the inode. If no extent size flags
1410 * are set on the inode then unconditionally clear the extent size hint.
1411 */
1412 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1413 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1414 else
1415 ip->i_d.di_extsize = 0;
1416 if (ip->i_d.di_version == 3 &&
1417 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1418 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1419 mp->m_sb.sb_blocklog;
1420 else
1421 ip->i_d.di_cowextsize = 0;
1422
1423 code = xfs_trans_commit(tp);
1424
1425 /*
1426 * Release any dquot(s) the inode had kept before chown.
1427 */
1428 xfs_qm_dqrele(olddquot);
1429 xfs_qm_dqrele(udqp);
1430 xfs_qm_dqrele(pdqp);
1431
1432 return code;
1433
1434 error_trans_cancel:
1435 xfs_trans_cancel(tp);
1436 error_free_dquots:
1437 xfs_qm_dqrele(udqp);
1438 xfs_qm_dqrele(pdqp);
1439 return code;
1440 }
1441
1442 STATIC int
1443 xfs_ioc_fssetxattr(
1444 xfs_inode_t *ip,
1445 struct file *filp,
1446 void __user *arg)
1447 {
1448 struct fsxattr fa;
1449 int error;
1450
1451 if (copy_from_user(&fa, arg, sizeof(fa)))
1452 return -EFAULT;
1453
1454 error = mnt_want_write_file(filp);
1455 if (error)
1456 return error;
1457 error = xfs_ioctl_setattr(ip, &fa);
1458 mnt_drop_write_file(filp);
1459 return error;
1460 }
1461
1462 STATIC int
1463 xfs_ioc_getxflags(
1464 xfs_inode_t *ip,
1465 void __user *arg)
1466 {
1467 unsigned int flags;
1468
1469 flags = xfs_di2lxflags(ip->i_d.di_flags);
1470 if (copy_to_user(arg, &flags, sizeof(flags)))
1471 return -EFAULT;
1472 return 0;
1473 }
1474
1475 STATIC int
1476 xfs_ioc_setxflags(
1477 struct xfs_inode *ip,
1478 struct file *filp,
1479 void __user *arg)
1480 {
1481 struct xfs_trans *tp;
1482 struct fsxattr fa;
1483 unsigned int flags;
1484 int join_flags = 0;
1485 int error;
1486
1487 if (copy_from_user(&flags, arg, sizeof(flags)))
1488 return -EFAULT;
1489
1490 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1491 FS_NOATIME_FL | FS_NODUMP_FL | \
1492 FS_SYNC_FL))
1493 return -EOPNOTSUPP;
1494
1495 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1496
1497 error = mnt_want_write_file(filp);
1498 if (error)
1499 return error;
1500
1501 /*
1502 * Changing DAX config may require inode locking for mapping
1503 * invalidation. These need to be held all the way to transaction commit
1504 * or cancel time, so need to be passed through to
1505 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1506 * appropriately.
1507 */
1508 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1509 if (error)
1510 goto out_drop_write;
1511
1512 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1513 if (IS_ERR(tp)) {
1514 error = PTR_ERR(tp);
1515 goto out_drop_write;
1516 }
1517
1518 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1519 if (error) {
1520 xfs_trans_cancel(tp);
1521 goto out_drop_write;
1522 }
1523
1524 error = xfs_trans_commit(tp);
1525 out_drop_write:
1526 mnt_drop_write_file(filp);
1527 return error;
1528 }
1529
1530 STATIC int
1531 xfs_getbmap_format(void **ap, struct getbmapx *bmv)
1532 {
1533 struct getbmap __user *base = (struct getbmap __user *)*ap;
1534
1535 /* copy only getbmap portion (not getbmapx) */
1536 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1537 return -EFAULT;
1538
1539 *ap += sizeof(struct getbmap);
1540 return 0;
1541 }
1542
1543 STATIC int
1544 xfs_ioc_getbmap(
1545 struct file *file,
1546 unsigned int cmd,
1547 void __user *arg)
1548 {
1549 struct getbmapx bmx = { 0 };
1550 int error;
1551
1552 /* struct getbmap is a strict subset of struct getbmapx. */
1553 if (copy_from_user(&bmx, arg, offsetof(struct getbmapx, bmv_iflags)))
1554 return -EFAULT;
1555
1556 if (bmx.bmv_count < 2)
1557 return -EINVAL;
1558
1559 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1560 if (file->f_mode & FMODE_NOCMTIME)
1561 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1562
1563 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
1564 (__force struct getbmap *)arg+1);
1565 if (error)
1566 return error;
1567
1568 /* copy back header - only size of getbmap */
1569 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1570 return -EFAULT;
1571 return 0;
1572 }
1573
1574 STATIC int
1575 xfs_getbmapx_format(void **ap, struct getbmapx *bmv)
1576 {
1577 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1578
1579 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1580 return -EFAULT;
1581
1582 *ap += sizeof(struct getbmapx);
1583 return 0;
1584 }
1585
1586 STATIC int
1587 xfs_ioc_getbmapx(
1588 struct xfs_inode *ip,
1589 void __user *arg)
1590 {
1591 struct getbmapx bmx;
1592 int error;
1593
1594 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1595 return -EFAULT;
1596
1597 if (bmx.bmv_count < 2)
1598 return -EINVAL;
1599
1600 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1601 return -EINVAL;
1602
1603 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1604 (__force struct getbmapx *)arg+1);
1605 if (error)
1606 return error;
1607
1608 /* copy back header */
1609 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1610 return -EFAULT;
1611
1612 return 0;
1613 }
1614
1615 struct getfsmap_info {
1616 struct xfs_mount *mp;
1617 struct fsmap_head __user *data;
1618 unsigned int idx;
1619 __u32 last_flags;
1620 };
1621
1622 STATIC int
1623 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1624 {
1625 struct getfsmap_info *info = priv;
1626 struct fsmap fm;
1627
1628 trace_xfs_getfsmap_mapping(info->mp, xfm);
1629
1630 info->last_flags = xfm->fmr_flags;
1631 xfs_fsmap_from_internal(&fm, xfm);
1632 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1633 sizeof(struct fsmap)))
1634 return -EFAULT;
1635
1636 return 0;
1637 }
1638
1639 STATIC int
1640 xfs_ioc_getfsmap(
1641 struct xfs_inode *ip,
1642 struct fsmap_head __user *arg)
1643 {
1644 struct getfsmap_info info = { NULL };
1645 struct xfs_fsmap_head xhead = {0};
1646 struct fsmap_head head;
1647 bool aborted = false;
1648 int error;
1649
1650 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1651 return -EFAULT;
1652 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1653 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1654 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1655 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1656 sizeof(head.fmh_keys[1].fmr_reserved)))
1657 return -EINVAL;
1658
1659 xhead.fmh_iflags = head.fmh_iflags;
1660 xhead.fmh_count = head.fmh_count;
1661 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1662 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1663
1664 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1665 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1666
1667 info.mp = ip->i_mount;
1668 info.data = arg;
1669 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1670 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1671 error = 0;
1672 aborted = true;
1673 } else if (error)
1674 return error;
1675
1676 /* If we didn't abort, set the "last" flag in the last fmx */
1677 if (!aborted && info.idx) {
1678 info.last_flags |= FMR_OF_LAST;
1679 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1680 &info.last_flags, sizeof(info.last_flags)))
1681 return -EFAULT;
1682 }
1683
1684 /* copy back header */
1685 head.fmh_entries = xhead.fmh_entries;
1686 head.fmh_oflags = xhead.fmh_oflags;
1687 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1688 return -EFAULT;
1689
1690 return 0;
1691 }
1692
1693 int
1694 xfs_ioc_swapext(
1695 xfs_swapext_t *sxp)
1696 {
1697 xfs_inode_t *ip, *tip;
1698 struct fd f, tmp;
1699 int error = 0;
1700
1701 /* Pull information for the target fd */
1702 f = fdget((int)sxp->sx_fdtarget);
1703 if (!f.file) {
1704 error = -EINVAL;
1705 goto out;
1706 }
1707
1708 if (!(f.file->f_mode & FMODE_WRITE) ||
1709 !(f.file->f_mode & FMODE_READ) ||
1710 (f.file->f_flags & O_APPEND)) {
1711 error = -EBADF;
1712 goto out_put_file;
1713 }
1714
1715 tmp = fdget((int)sxp->sx_fdtmp);
1716 if (!tmp.file) {
1717 error = -EINVAL;
1718 goto out_put_file;
1719 }
1720
1721 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1722 !(tmp.file->f_mode & FMODE_READ) ||
1723 (tmp.file->f_flags & O_APPEND)) {
1724 error = -EBADF;
1725 goto out_put_tmp_file;
1726 }
1727
1728 if (IS_SWAPFILE(file_inode(f.file)) ||
1729 IS_SWAPFILE(file_inode(tmp.file))) {
1730 error = -EINVAL;
1731 goto out_put_tmp_file;
1732 }
1733
1734 /*
1735 * We need to ensure that the fds passed in point to XFS inodes
1736 * before we cast and access them as XFS structures as we have no
1737 * control over what the user passes us here.
1738 */
1739 if (f.file->f_op != &xfs_file_operations ||
1740 tmp.file->f_op != &xfs_file_operations) {
1741 error = -EINVAL;
1742 goto out_put_tmp_file;
1743 }
1744
1745 ip = XFS_I(file_inode(f.file));
1746 tip = XFS_I(file_inode(tmp.file));
1747
1748 if (ip->i_mount != tip->i_mount) {
1749 error = -EINVAL;
1750 goto out_put_tmp_file;
1751 }
1752
1753 if (ip->i_ino == tip->i_ino) {
1754 error = -EINVAL;
1755 goto out_put_tmp_file;
1756 }
1757
1758 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1759 error = -EIO;
1760 goto out_put_tmp_file;
1761 }
1762
1763 error = xfs_swap_extents(ip, tip, sxp);
1764
1765 out_put_tmp_file:
1766 fdput(tmp);
1767 out_put_file:
1768 fdput(f);
1769 out:
1770 return error;
1771 }
1772
1773 /*
1774 * Note: some of the ioctl's return positive numbers as a
1775 * byte count indicating success, such as readlink_by_handle.
1776 * So we don't "sign flip" like most other routines. This means
1777 * true errors need to be returned as a negative value.
1778 */
1779 long
1780 xfs_file_ioctl(
1781 struct file *filp,
1782 unsigned int cmd,
1783 unsigned long p)
1784 {
1785 struct inode *inode = file_inode(filp);
1786 struct xfs_inode *ip = XFS_I(inode);
1787 struct xfs_mount *mp = ip->i_mount;
1788 void __user *arg = (void __user *)p;
1789 int error;
1790
1791 trace_xfs_file_ioctl(ip);
1792
1793 switch (cmd) {
1794 case FITRIM:
1795 return xfs_ioc_trim(mp, arg);
1796 case XFS_IOC_ALLOCSP:
1797 case XFS_IOC_FREESP:
1798 case XFS_IOC_RESVSP:
1799 case XFS_IOC_UNRESVSP:
1800 case XFS_IOC_ALLOCSP64:
1801 case XFS_IOC_FREESP64:
1802 case XFS_IOC_RESVSP64:
1803 case XFS_IOC_UNRESVSP64:
1804 case XFS_IOC_ZERO_RANGE: {
1805 xfs_flock64_t bf;
1806
1807 if (copy_from_user(&bf, arg, sizeof(bf)))
1808 return -EFAULT;
1809 return xfs_ioc_space(filp, cmd, &bf);
1810 }
1811 case XFS_IOC_DIOINFO: {
1812 struct dioattr da;
1813 xfs_buftarg_t *target =
1814 XFS_IS_REALTIME_INODE(ip) ?
1815 mp->m_rtdev_targp : mp->m_ddev_targp;
1816
1817 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1818 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1819
1820 if (copy_to_user(arg, &da, sizeof(da)))
1821 return -EFAULT;
1822 return 0;
1823 }
1824
1825 case XFS_IOC_FSBULKSTAT_SINGLE:
1826 case XFS_IOC_FSBULKSTAT:
1827 case XFS_IOC_FSINUMBERS:
1828 return xfs_ioc_bulkstat(mp, cmd, arg);
1829
1830 case XFS_IOC_FSGEOMETRY_V1:
1831 return xfs_ioc_fsgeometry_v1(mp, arg);
1832
1833 case XFS_IOC_FSGEOMETRY:
1834 return xfs_ioc_fsgeometry(mp, arg);
1835
1836 case XFS_IOC_GETVERSION:
1837 return put_user(inode->i_generation, (int __user *)arg);
1838
1839 case XFS_IOC_FSGETXATTR:
1840 return xfs_ioc_fsgetxattr(ip, 0, arg);
1841 case XFS_IOC_FSGETXATTRA:
1842 return xfs_ioc_fsgetxattr(ip, 1, arg);
1843 case XFS_IOC_FSSETXATTR:
1844 return xfs_ioc_fssetxattr(ip, filp, arg);
1845 case XFS_IOC_GETXFLAGS:
1846 return xfs_ioc_getxflags(ip, arg);
1847 case XFS_IOC_SETXFLAGS:
1848 return xfs_ioc_setxflags(ip, filp, arg);
1849
1850 case XFS_IOC_FSSETDM: {
1851 struct fsdmidata dmi;
1852
1853 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1854 return -EFAULT;
1855
1856 error = mnt_want_write_file(filp);
1857 if (error)
1858 return error;
1859
1860 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1861 dmi.fsd_dmstate);
1862 mnt_drop_write_file(filp);
1863 return error;
1864 }
1865
1866 case XFS_IOC_GETBMAP:
1867 case XFS_IOC_GETBMAPA:
1868 return xfs_ioc_getbmap(filp, cmd, arg);
1869
1870 case XFS_IOC_GETBMAPX:
1871 return xfs_ioc_getbmapx(ip, arg);
1872
1873 case FS_IOC_GETFSMAP:
1874 return xfs_ioc_getfsmap(ip, arg);
1875
1876 case XFS_IOC_FD_TO_HANDLE:
1877 case XFS_IOC_PATH_TO_HANDLE:
1878 case XFS_IOC_PATH_TO_FSHANDLE: {
1879 xfs_fsop_handlereq_t hreq;
1880
1881 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1882 return -EFAULT;
1883 return xfs_find_handle(cmd, &hreq);
1884 }
1885 case XFS_IOC_OPEN_BY_HANDLE: {
1886 xfs_fsop_handlereq_t hreq;
1887
1888 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1889 return -EFAULT;
1890 return xfs_open_by_handle(filp, &hreq);
1891 }
1892 case XFS_IOC_FSSETDM_BY_HANDLE:
1893 return xfs_fssetdm_by_handle(filp, arg);
1894
1895 case XFS_IOC_READLINK_BY_HANDLE: {
1896 xfs_fsop_handlereq_t hreq;
1897
1898 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1899 return -EFAULT;
1900 return xfs_readlink_by_handle(filp, &hreq);
1901 }
1902 case XFS_IOC_ATTRLIST_BY_HANDLE:
1903 return xfs_attrlist_by_handle(filp, arg);
1904
1905 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1906 return xfs_attrmulti_by_handle(filp, arg);
1907
1908 case XFS_IOC_SWAPEXT: {
1909 struct xfs_swapext sxp;
1910
1911 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1912 return -EFAULT;
1913 error = mnt_want_write_file(filp);
1914 if (error)
1915 return error;
1916 error = xfs_ioc_swapext(&sxp);
1917 mnt_drop_write_file(filp);
1918 return error;
1919 }
1920
1921 case XFS_IOC_FSCOUNTS: {
1922 xfs_fsop_counts_t out;
1923
1924 error = xfs_fs_counts(mp, &out);
1925 if (error)
1926 return error;
1927
1928 if (copy_to_user(arg, &out, sizeof(out)))
1929 return -EFAULT;
1930 return 0;
1931 }
1932
1933 case XFS_IOC_SET_RESBLKS: {
1934 xfs_fsop_resblks_t inout;
1935 uint64_t in;
1936
1937 if (!capable(CAP_SYS_ADMIN))
1938 return -EPERM;
1939
1940 if (mp->m_flags & XFS_MOUNT_RDONLY)
1941 return -EROFS;
1942
1943 if (copy_from_user(&inout, arg, sizeof(inout)))
1944 return -EFAULT;
1945
1946 error = mnt_want_write_file(filp);
1947 if (error)
1948 return error;
1949
1950 /* input parameter is passed in resblks field of structure */
1951 in = inout.resblks;
1952 error = xfs_reserve_blocks(mp, &in, &inout);
1953 mnt_drop_write_file(filp);
1954 if (error)
1955 return error;
1956
1957 if (copy_to_user(arg, &inout, sizeof(inout)))
1958 return -EFAULT;
1959 return 0;
1960 }
1961
1962 case XFS_IOC_GET_RESBLKS: {
1963 xfs_fsop_resblks_t out;
1964
1965 if (!capable(CAP_SYS_ADMIN))
1966 return -EPERM;
1967
1968 error = xfs_reserve_blocks(mp, NULL, &out);
1969 if (error)
1970 return error;
1971
1972 if (copy_to_user(arg, &out, sizeof(out)))
1973 return -EFAULT;
1974
1975 return 0;
1976 }
1977
1978 case XFS_IOC_FSGROWFSDATA: {
1979 xfs_growfs_data_t in;
1980
1981 if (copy_from_user(&in, arg, sizeof(in)))
1982 return -EFAULT;
1983
1984 error = mnt_want_write_file(filp);
1985 if (error)
1986 return error;
1987 error = xfs_growfs_data(mp, &in);
1988 mnt_drop_write_file(filp);
1989 return error;
1990 }
1991
1992 case XFS_IOC_FSGROWFSLOG: {
1993 xfs_growfs_log_t in;
1994
1995 if (copy_from_user(&in, arg, sizeof(in)))
1996 return -EFAULT;
1997
1998 error = mnt_want_write_file(filp);
1999 if (error)
2000 return error;
2001 error = xfs_growfs_log(mp, &in);
2002 mnt_drop_write_file(filp);
2003 return error;
2004 }
2005
2006 case XFS_IOC_FSGROWFSRT: {
2007 xfs_growfs_rt_t in;
2008
2009 if (copy_from_user(&in, arg, sizeof(in)))
2010 return -EFAULT;
2011
2012 error = mnt_want_write_file(filp);
2013 if (error)
2014 return error;
2015 error = xfs_growfs_rt(mp, &in);
2016 mnt_drop_write_file(filp);
2017 return error;
2018 }
2019
2020 case XFS_IOC_GOINGDOWN: {
2021 uint32_t in;
2022
2023 if (!capable(CAP_SYS_ADMIN))
2024 return -EPERM;
2025
2026 if (get_user(in, (uint32_t __user *)arg))
2027 return -EFAULT;
2028
2029 return xfs_fs_goingdown(mp, in);
2030 }
2031
2032 case XFS_IOC_ERROR_INJECTION: {
2033 xfs_error_injection_t in;
2034
2035 if (!capable(CAP_SYS_ADMIN))
2036 return -EPERM;
2037
2038 if (copy_from_user(&in, arg, sizeof(in)))
2039 return -EFAULT;
2040
2041 return xfs_errortag_add(mp, in.errtag);
2042 }
2043
2044 case XFS_IOC_ERROR_CLEARALL:
2045 if (!capable(CAP_SYS_ADMIN))
2046 return -EPERM;
2047
2048 return xfs_errortag_clearall(mp);
2049
2050 case XFS_IOC_FREE_EOFBLOCKS: {
2051 struct xfs_fs_eofblocks eofb;
2052 struct xfs_eofblocks keofb;
2053
2054 if (!capable(CAP_SYS_ADMIN))
2055 return -EPERM;
2056
2057 if (mp->m_flags & XFS_MOUNT_RDONLY)
2058 return -EROFS;
2059
2060 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2061 return -EFAULT;
2062
2063 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2064 if (error)
2065 return error;
2066
2067 return xfs_icache_free_eofblocks(mp, &keofb);
2068 }
2069
2070 default:
2071 return -ENOTTY;
2072 }
2073 }
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