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x86/oprofile: Fix bogus GCC-8 warning in nmi_setup()
[cris-mirror.git] / fs / xfs / xfs_ioctl.c
blob89fb1eb80aae88b3a47e4fd63cb64857639fbb76
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 #include "scrub/xfs_scrub.h"
48 #include "xfs_sb.h"
49
50 #include <linux/capability.h>
51 #include <linux/cred.h>
52 #include <linux/dcache.h>
53 #include <linux/mount.h>
54 #include <linux/namei.h>
55 #include <linux/pagemap.h>
56 #include <linux/slab.h>
57 #include <linux/exportfs.h>
58
59 /*
60 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
61 * a file or fs handle.
62 *
63 * XFS_IOC_PATH_TO_FSHANDLE
64 * returns fs handle for a mount point or path within that mount point
65 * XFS_IOC_FD_TO_HANDLE
66 * returns full handle for a FD opened in user space
67 * XFS_IOC_PATH_TO_HANDLE
68 * returns full handle for a path
69 */
70 int
71 xfs_find_handle(
72 unsigned int cmd,
73 xfs_fsop_handlereq_t *hreq)
74 {
75 int hsize;
76 xfs_handle_t handle;
77 struct inode *inode;
78 struct fd f = {NULL};
79 struct path path;
80 int error;
81 struct xfs_inode *ip;
82
83 if (cmd == XFS_IOC_FD_TO_HANDLE) {
84 f = fdget(hreq->fd);
85 if (!f.file)
86 return -EBADF;
87 inode = file_inode(f.file);
88 } else {
89 error = user_lpath((const char __user *)hreq->path, &path);
90 if (error)
91 return error;
92 inode = d_inode(path.dentry);
93 }
94 ip = XFS_I(inode);
95
96 /*
97 * We can only generate handles for inodes residing on a XFS filesystem,
98 * and only for regular files, directories or symbolic links.
99 */
100 error = -EINVAL;
101 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
102 goto out_put;
103
104 error = -EBADF;
105 if (!S_ISREG(inode->i_mode) &&
106 !S_ISDIR(inode->i_mode) &&
107 !S_ISLNK(inode->i_mode))
108 goto out_put;
109
110
111 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
112
113 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
114 /*
115 * This handle only contains an fsid, zero the rest.
116 */
117 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
118 hsize = sizeof(xfs_fsid_t);
119 } else {
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = inode->i_generation;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 hsize = sizeof(xfs_handle_t);
126 }
127
128 error = -EFAULT;
129 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
130 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
131 goto out_put;
132
133 error = 0;
134
135 out_put:
136 if (cmd == XFS_IOC_FD_TO_HANDLE)
137 fdput(f);
138 else
139 path_put(&path);
140 return error;
141 }
142
143 /*
144 * No need to do permission checks on the various pathname components
145 * as the handle operations are privileged.
146 */
147 STATIC int
148 xfs_handle_acceptable(
149 void *context,
150 struct dentry *dentry)
151 {
152 return 1;
153 }
154
155 /*
156 * Convert userspace handle data into a dentry.
157 */
158 struct dentry *
159 xfs_handle_to_dentry(
160 struct file *parfilp,
161 void __user *uhandle,
162 u32 hlen)
163 {
164 xfs_handle_t handle;
165 struct xfs_fid64 fid;
166
167 /*
168 * Only allow handle opens under a directory.
169 */
170 if (!S_ISDIR(file_inode(parfilp)->i_mode))
171 return ERR_PTR(-ENOTDIR);
172
173 if (hlen != sizeof(xfs_handle_t))
174 return ERR_PTR(-EINVAL);
175 if (copy_from_user(&handle, uhandle, hlen))
176 return ERR_PTR(-EFAULT);
177 if (handle.ha_fid.fid_len !=
178 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
179 return ERR_PTR(-EINVAL);
180
181 memset(&fid, 0, sizeof(struct fid));
182 fid.ino = handle.ha_fid.fid_ino;
183 fid.gen = handle.ha_fid.fid_gen;
184
185 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
186 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
187 xfs_handle_acceptable, NULL);
188 }
189
190 STATIC struct dentry *
191 xfs_handlereq_to_dentry(
192 struct file *parfilp,
193 xfs_fsop_handlereq_t *hreq)
194 {
195 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
196 }
197
198 int
199 xfs_open_by_handle(
200 struct file *parfilp,
201 xfs_fsop_handlereq_t *hreq)
202 {
203 const struct cred *cred = current_cred();
204 int error;
205 int fd;
206 int permflag;
207 struct file *filp;
208 struct inode *inode;
209 struct dentry *dentry;
210 fmode_t fmode;
211 struct path path;
212
213 if (!capable(CAP_SYS_ADMIN))
214 return -EPERM;
215
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 if (IS_ERR(dentry))
218 return PTR_ERR(dentry);
219 inode = d_inode(dentry);
220
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
223 error = -EPERM;
224 goto out_dput;
225 }
226
227 #if BITS_PER_LONG != 32
228 hreq->oflags |= O_LARGEFILE;
229 #endif
230
231 permflag = hreq->oflags;
232 fmode = OPEN_FMODE(permflag);
233 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
234 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
235 error = -EPERM;
236 goto out_dput;
237 }
238
239 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
240 error = -EPERM;
241 goto out_dput;
242 }
243
244 /* Can't write directories. */
245 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
246 error = -EISDIR;
247 goto out_dput;
248 }
249
250 fd = get_unused_fd_flags(0);
251 if (fd < 0) {
252 error = fd;
253 goto out_dput;
254 }
255
256 path.mnt = parfilp->f_path.mnt;
257 path.dentry = dentry;
258 filp = dentry_open(&path, hreq->oflags, cred);
259 dput(dentry);
260 if (IS_ERR(filp)) {
261 put_unused_fd(fd);
262 return PTR_ERR(filp);
263 }
264
265 if (S_ISREG(inode->i_mode)) {
266 filp->f_flags |= O_NOATIME;
267 filp->f_mode |= FMODE_NOCMTIME;
268 }
269
270 fd_install(fd, filp);
271 return fd;
272
273 out_dput:
274 dput(dentry);
275 return error;
276 }
277
278 int
279 xfs_readlink_by_handle(
280 struct file *parfilp,
281 xfs_fsop_handlereq_t *hreq)
282 {
283 struct dentry *dentry;
284 __u32 olen;
285 int error;
286
287 if (!capable(CAP_SYS_ADMIN))
288 return -EPERM;
289
290 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
291 if (IS_ERR(dentry))
292 return PTR_ERR(dentry);
293
294 /* Restrict this handle operation to symlinks only. */
295 if (!d_is_symlink(dentry)) {
296 error = -EINVAL;
297 goto out_dput;
298 }
299
300 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
301 error = -EFAULT;
302 goto out_dput;
303 }
304
305 error = vfs_readlink(dentry, hreq->ohandle, olen);
306
307 out_dput:
308 dput(dentry);
309 return error;
310 }
311
312 int
313 xfs_set_dmattrs(
314 xfs_inode_t *ip,
315 uint evmask,
316 uint16_t state)
317 {
318 xfs_mount_t *mp = ip->i_mount;
319 xfs_trans_t *tp;
320 int error;
321
322 if (!capable(CAP_SYS_ADMIN))
323 return -EPERM;
324
325 if (XFS_FORCED_SHUTDOWN(mp))
326 return -EIO;
327
328 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
329 if (error)
330 return error;
331
332 xfs_ilock(ip, XFS_ILOCK_EXCL);
333 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
334
335 ip->i_d.di_dmevmask = evmask;
336 ip->i_d.di_dmstate = state;
337
338 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
339 error = xfs_trans_commit(tp);
340
341 return error;
342 }
343
344 STATIC int
345 xfs_fssetdm_by_handle(
346 struct file *parfilp,
347 void __user *arg)
348 {
349 int error;
350 struct fsdmidata fsd;
351 xfs_fsop_setdm_handlereq_t dmhreq;
352 struct dentry *dentry;
353
354 if (!capable(CAP_MKNOD))
355 return -EPERM;
356 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
357 return -EFAULT;
358
359 error = mnt_want_write_file(parfilp);
360 if (error)
361 return error;
362
363 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
364 if (IS_ERR(dentry)) {
365 mnt_drop_write_file(parfilp);
366 return PTR_ERR(dentry);
367 }
368
369 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
370 error = -EPERM;
371 goto out;
372 }
373
374 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
375 error = -EFAULT;
376 goto out;
377 }
378
379 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
380 fsd.fsd_dmstate);
381
382 out:
383 mnt_drop_write_file(parfilp);
384 dput(dentry);
385 return error;
386 }
387
388 STATIC int
389 xfs_attrlist_by_handle(
390 struct file *parfilp,
391 void __user *arg)
392 {
393 int error = -ENOMEM;
394 attrlist_cursor_kern_t *cursor;
395 struct xfs_fsop_attrlist_handlereq __user *p = arg;
396 xfs_fsop_attrlist_handlereq_t al_hreq;
397 struct dentry *dentry;
398 char *kbuf;
399
400 if (!capable(CAP_SYS_ADMIN))
401 return -EPERM;
402 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
403 return -EFAULT;
404 if (al_hreq.buflen < sizeof(struct attrlist) ||
405 al_hreq.buflen > XFS_XATTR_LIST_MAX)
406 return -EINVAL;
407
408 /*
409 * Reject flags, only allow namespaces.
410 */
411 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
412 return -EINVAL;
413
414 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
415 if (IS_ERR(dentry))
416 return PTR_ERR(dentry);
417
418 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
419 if (!kbuf)
420 goto out_dput;
421
422 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
423 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
424 al_hreq.flags, cursor);
425 if (error)
426 goto out_kfree;
427
428 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
429 error = -EFAULT;
430 goto out_kfree;
431 }
432
433 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
434 error = -EFAULT;
435
436 out_kfree:
437 kmem_free(kbuf);
438 out_dput:
439 dput(dentry);
440 return error;
441 }
442
443 int
444 xfs_attrmulti_attr_get(
445 struct inode *inode,
446 unsigned char *name,
447 unsigned char __user *ubuf,
448 uint32_t *len,
449 uint32_t flags)
450 {
451 unsigned char *kbuf;
452 int error = -EFAULT;
453
454 if (*len > XFS_XATTR_SIZE_MAX)
455 return -EINVAL;
456 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
457 if (!kbuf)
458 return -ENOMEM;
459
460 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
461 if (error)
462 goto out_kfree;
463
464 if (copy_to_user(ubuf, kbuf, *len))
465 error = -EFAULT;
466
467 out_kfree:
468 kmem_free(kbuf);
469 return error;
470 }
471
472 int
473 xfs_attrmulti_attr_set(
474 struct inode *inode,
475 unsigned char *name,
476 const unsigned char __user *ubuf,
477 uint32_t len,
478 uint32_t flags)
479 {
480 unsigned char *kbuf;
481 int error;
482
483 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
484 return -EPERM;
485 if (len > XFS_XATTR_SIZE_MAX)
486 return -EINVAL;
487
488 kbuf = memdup_user(ubuf, len);
489 if (IS_ERR(kbuf))
490 return PTR_ERR(kbuf);
491
492 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
493 if (!error)
494 xfs_forget_acl(inode, name, flags);
495 kfree(kbuf);
496 return error;
497 }
498
499 int
500 xfs_attrmulti_attr_remove(
501 struct inode *inode,
502 unsigned char *name,
503 uint32_t flags)
504 {
505 int error;
506
507 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
508 return -EPERM;
509 error = xfs_attr_remove(XFS_I(inode), name, flags);
510 if (!error)
511 xfs_forget_acl(inode, name, flags);
512 return error;
513 }
514
515 STATIC int
516 xfs_attrmulti_by_handle(
517 struct file *parfilp,
518 void __user *arg)
519 {
520 int error;
521 xfs_attr_multiop_t *ops;
522 xfs_fsop_attrmulti_handlereq_t am_hreq;
523 struct dentry *dentry;
524 unsigned int i, size;
525 unsigned char *attr_name;
526
527 if (!capable(CAP_SYS_ADMIN))
528 return -EPERM;
529 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
530 return -EFAULT;
531
532 /* overflow check */
533 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
534 return -E2BIG;
535
536 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
537 if (IS_ERR(dentry))
538 return PTR_ERR(dentry);
539
540 error = -E2BIG;
541 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
542 if (!size || size > 16 * PAGE_SIZE)
543 goto out_dput;
544
545 ops = memdup_user(am_hreq.ops, size);
546 if (IS_ERR(ops)) {
547 error = PTR_ERR(ops);
548 goto out_dput;
549 }
550
551 error = -ENOMEM;
552 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
553 if (!attr_name)
554 goto out_kfree_ops;
555
556 error = 0;
557 for (i = 0; i < am_hreq.opcount; i++) {
558 ops[i].am_error = strncpy_from_user((char *)attr_name,
559 ops[i].am_attrname, MAXNAMELEN);
560 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
561 error = -ERANGE;
562 if (ops[i].am_error < 0)
563 break;
564
565 switch (ops[i].am_opcode) {
566 case ATTR_OP_GET:
567 ops[i].am_error = xfs_attrmulti_attr_get(
568 d_inode(dentry), attr_name,
569 ops[i].am_attrvalue, &ops[i].am_length,
570 ops[i].am_flags);
571 break;
572 case ATTR_OP_SET:
573 ops[i].am_error = mnt_want_write_file(parfilp);
574 if (ops[i].am_error)
575 break;
576 ops[i].am_error = xfs_attrmulti_attr_set(
577 d_inode(dentry), attr_name,
578 ops[i].am_attrvalue, ops[i].am_length,
579 ops[i].am_flags);
580 mnt_drop_write_file(parfilp);
581 break;
582 case ATTR_OP_REMOVE:
583 ops[i].am_error = mnt_want_write_file(parfilp);
584 if (ops[i].am_error)
585 break;
586 ops[i].am_error = xfs_attrmulti_attr_remove(
587 d_inode(dentry), attr_name,
588 ops[i].am_flags);
589 mnt_drop_write_file(parfilp);
590 break;
591 default:
592 ops[i].am_error = -EINVAL;
593 }
594 }
595
596 if (copy_to_user(am_hreq.ops, ops, size))
597 error = -EFAULT;
598
599 kfree(attr_name);
600 out_kfree_ops:
601 kfree(ops);
602 out_dput:
603 dput(dentry);
604 return error;
605 }
606
607 int
608 xfs_ioc_space(
609 struct file *filp,
610 unsigned int cmd,
611 xfs_flock64_t *bf)
612 {
613 struct inode *inode = file_inode(filp);
614 struct xfs_inode *ip = XFS_I(inode);
615 struct iattr iattr;
616 enum xfs_prealloc_flags flags = 0;
617 uint iolock = XFS_IOLOCK_EXCL;
618 int error;
619
620 /*
621 * Only allow the sys admin to reserve space unless
622 * unwritten extents are enabled.
623 */
624 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
625 !capable(CAP_SYS_ADMIN))
626 return -EPERM;
627
628 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
629 return -EPERM;
630
631 if (!(filp->f_mode & FMODE_WRITE))
632 return -EBADF;
633
634 if (!S_ISREG(inode->i_mode))
635 return -EINVAL;
636
637 if (filp->f_flags & O_DSYNC)
638 flags |= XFS_PREALLOC_SYNC;
639 if (filp->f_mode & FMODE_NOCMTIME)
640 flags |= XFS_PREALLOC_INVISIBLE;
641
642 error = mnt_want_write_file(filp);
643 if (error)
644 return error;
645
646 xfs_ilock(ip, iolock);
647 error = xfs_break_layouts(inode, &iolock);
648 if (error)
649 goto out_unlock;
650
651 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
652 iolock |= XFS_MMAPLOCK_EXCL;
653
654 switch (bf->l_whence) {
655 case 0: /*SEEK_SET*/
656 break;
657 case 1: /*SEEK_CUR*/
658 bf->l_start += filp->f_pos;
659 break;
660 case 2: /*SEEK_END*/
661 bf->l_start += XFS_ISIZE(ip);
662 break;
663 default:
664 error = -EINVAL;
665 goto out_unlock;
666 }
667
668 /*
669 * length of <= 0 for resv/unresv/zero is invalid. length for
670 * alloc/free is ignored completely and we have no idea what userspace
671 * might have set it to, so set it to zero to allow range
672 * checks to pass.
673 */
674 switch (cmd) {
675 case XFS_IOC_ZERO_RANGE:
676 case XFS_IOC_RESVSP:
677 case XFS_IOC_RESVSP64:
678 case XFS_IOC_UNRESVSP:
679 case XFS_IOC_UNRESVSP64:
680 if (bf->l_len <= 0) {
681 error = -EINVAL;
682 goto out_unlock;
683 }
684 break;
685 default:
686 bf->l_len = 0;
687 break;
688 }
689
690 if (bf->l_start < 0 ||
691 bf->l_start > inode->i_sb->s_maxbytes ||
692 bf->l_start + bf->l_len < 0 ||
693 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
694 error = -EINVAL;
695 goto out_unlock;
696 }
697
698 switch (cmd) {
699 case XFS_IOC_ZERO_RANGE:
700 flags |= XFS_PREALLOC_SET;
701 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
702 break;
703 case XFS_IOC_RESVSP:
704 case XFS_IOC_RESVSP64:
705 flags |= XFS_PREALLOC_SET;
706 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
707 XFS_BMAPI_PREALLOC);
708 break;
709 case XFS_IOC_UNRESVSP:
710 case XFS_IOC_UNRESVSP64:
711 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
712 break;
713 case XFS_IOC_ALLOCSP:
714 case XFS_IOC_ALLOCSP64:
715 case XFS_IOC_FREESP:
716 case XFS_IOC_FREESP64:
717 flags |= XFS_PREALLOC_CLEAR;
718 if (bf->l_start > XFS_ISIZE(ip)) {
719 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
720 bf->l_start - XFS_ISIZE(ip), 0);
721 if (error)
722 goto out_unlock;
723 }
724
725 iattr.ia_valid = ATTR_SIZE;
726 iattr.ia_size = bf->l_start;
727
728 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
729 break;
730 default:
731 ASSERT(0);
732 error = -EINVAL;
733 }
734
735 if (error)
736 goto out_unlock;
737
738 error = xfs_update_prealloc_flags(ip, flags);
739
740 out_unlock:
741 xfs_iunlock(ip, iolock);
742 mnt_drop_write_file(filp);
743 return error;
744 }
745
746 STATIC int
747 xfs_ioc_bulkstat(
748 xfs_mount_t *mp,
749 unsigned int cmd,
750 void __user *arg)
751 {
752 xfs_fsop_bulkreq_t bulkreq;
753 int count; /* # of records returned */
754 xfs_ino_t inlast; /* last inode number */
755 int done;
756 int error;
757
758 /* done = 1 if there are more stats to get and if bulkstat */
759 /* should be called again (unused here, but used in dmapi) */
760
761 if (!capable(CAP_SYS_ADMIN))
762 return -EPERM;
763
764 if (XFS_FORCED_SHUTDOWN(mp))
765 return -EIO;
766
767 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
768 return -EFAULT;
769
770 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
771 return -EFAULT;
772
773 if ((count = bulkreq.icount) <= 0)
774 return -EINVAL;
775
776 if (bulkreq.ubuffer == NULL)
777 return -EINVAL;
778
779 if (cmd == XFS_IOC_FSINUMBERS)
780 error = xfs_inumbers(mp, &inlast, &count,
781 bulkreq.ubuffer, xfs_inumbers_fmt);
782 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
783 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
784 sizeof(xfs_bstat_t), NULL, &done);
785 else /* XFS_IOC_FSBULKSTAT */
786 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
787 sizeof(xfs_bstat_t), bulkreq.ubuffer,
788 &done);
789
790 if (error)
791 return error;
792
793 if (bulkreq.ocount != NULL) {
794 if (copy_to_user(bulkreq.lastip, &inlast,
795 sizeof(xfs_ino_t)))
796 return -EFAULT;
797
798 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
799 return -EFAULT;
800 }
801
802 return 0;
803 }
804
805 STATIC int
806 xfs_ioc_fsgeometry_v1(
807 xfs_mount_t *mp,
808 void __user *arg)
809 {
810 xfs_fsop_geom_t fsgeo;
811 int error;
812
813 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
814 if (error)
815 return error;
816
817 /*
818 * Caller should have passed an argument of type
819 * xfs_fsop_geom_v1_t. This is a proper subset of the
820 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
821 */
822 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
823 return -EFAULT;
824 return 0;
825 }
826
827 STATIC int
828 xfs_ioc_fsgeometry(
829 xfs_mount_t *mp,
830 void __user *arg)
831 {
832 xfs_fsop_geom_t fsgeo;
833 int error;
834
835 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 4);
836 if (error)
837 return error;
838
839 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
840 return -EFAULT;
841 return 0;
842 }
843
844 /*
845 * Linux extended inode flags interface.
846 */
847
848 STATIC unsigned int
849 xfs_merge_ioc_xflags(
850 unsigned int flags,
851 unsigned int start)
852 {
853 unsigned int xflags = start;
854
855 if (flags & FS_IMMUTABLE_FL)
856 xflags |= FS_XFLAG_IMMUTABLE;
857 else
858 xflags &= ~FS_XFLAG_IMMUTABLE;
859 if (flags & FS_APPEND_FL)
860 xflags |= FS_XFLAG_APPEND;
861 else
862 xflags &= ~FS_XFLAG_APPEND;
863 if (flags & FS_SYNC_FL)
864 xflags |= FS_XFLAG_SYNC;
865 else
866 xflags &= ~FS_XFLAG_SYNC;
867 if (flags & FS_NOATIME_FL)
868 xflags |= FS_XFLAG_NOATIME;
869 else
870 xflags &= ~FS_XFLAG_NOATIME;
871 if (flags & FS_NODUMP_FL)
872 xflags |= FS_XFLAG_NODUMP;
873 else
874 xflags &= ~FS_XFLAG_NODUMP;
875
876 return xflags;
877 }
878
879 STATIC unsigned int
880 xfs_di2lxflags(
881 uint16_t di_flags)
882 {
883 unsigned int flags = 0;
884
885 if (di_flags & XFS_DIFLAG_IMMUTABLE)
886 flags |= FS_IMMUTABLE_FL;
887 if (di_flags & XFS_DIFLAG_APPEND)
888 flags |= FS_APPEND_FL;
889 if (di_flags & XFS_DIFLAG_SYNC)
890 flags |= FS_SYNC_FL;
891 if (di_flags & XFS_DIFLAG_NOATIME)
892 flags |= FS_NOATIME_FL;
893 if (di_flags & XFS_DIFLAG_NODUMP)
894 flags |= FS_NODUMP_FL;
895 return flags;
896 }
897
898 STATIC int
899 xfs_ioc_fsgetxattr(
900 xfs_inode_t *ip,
901 int attr,
902 void __user *arg)
903 {
904 struct fsxattr fa;
905
906 memset(&fa, 0, sizeof(struct fsxattr));
907
908 xfs_ilock(ip, XFS_ILOCK_SHARED);
909 fa.fsx_xflags = xfs_ip2xflags(ip);
910 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
911 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
912 ip->i_mount->m_sb.sb_blocklog;
913 fa.fsx_projid = xfs_get_projid(ip);
914
915 if (attr) {
916 if (ip->i_afp) {
917 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
918 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
919 else
920 fa.fsx_nextents = ip->i_d.di_anextents;
921 } else
922 fa.fsx_nextents = 0;
923 } else {
924 if (ip->i_df.if_flags & XFS_IFEXTENTS)
925 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
926 else
927 fa.fsx_nextents = ip->i_d.di_nextents;
928 }
929 xfs_iunlock(ip, XFS_ILOCK_SHARED);
930
931 if (copy_to_user(arg, &fa, sizeof(fa)))
932 return -EFAULT;
933 return 0;
934 }
935
936 STATIC uint16_t
937 xfs_flags2diflags(
938 struct xfs_inode *ip,
939 unsigned int xflags)
940 {
941 /* can't set PREALLOC this way, just preserve it */
942 uint16_t di_flags =
943 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
944
945 if (xflags & FS_XFLAG_IMMUTABLE)
946 di_flags |= XFS_DIFLAG_IMMUTABLE;
947 if (xflags & FS_XFLAG_APPEND)
948 di_flags |= XFS_DIFLAG_APPEND;
949 if (xflags & FS_XFLAG_SYNC)
950 di_flags |= XFS_DIFLAG_SYNC;
951 if (xflags & FS_XFLAG_NOATIME)
952 di_flags |= XFS_DIFLAG_NOATIME;
953 if (xflags & FS_XFLAG_NODUMP)
954 di_flags |= XFS_DIFLAG_NODUMP;
955 if (xflags & FS_XFLAG_NODEFRAG)
956 di_flags |= XFS_DIFLAG_NODEFRAG;
957 if (xflags & FS_XFLAG_FILESTREAM)
958 di_flags |= XFS_DIFLAG_FILESTREAM;
959 if (S_ISDIR(VFS_I(ip)->i_mode)) {
960 if (xflags & FS_XFLAG_RTINHERIT)
961 di_flags |= XFS_DIFLAG_RTINHERIT;
962 if (xflags & FS_XFLAG_NOSYMLINKS)
963 di_flags |= XFS_DIFLAG_NOSYMLINKS;
964 if (xflags & FS_XFLAG_EXTSZINHERIT)
965 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
966 if (xflags & FS_XFLAG_PROJINHERIT)
967 di_flags |= XFS_DIFLAG_PROJINHERIT;
968 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
969 if (xflags & FS_XFLAG_REALTIME)
970 di_flags |= XFS_DIFLAG_REALTIME;
971 if (xflags & FS_XFLAG_EXTSIZE)
972 di_flags |= XFS_DIFLAG_EXTSIZE;
973 }
974
975 return di_flags;
976 }
977
978 STATIC uint64_t
979 xfs_flags2diflags2(
980 struct xfs_inode *ip,
981 unsigned int xflags)
982 {
983 uint64_t di_flags2 =
984 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
985
986 if (xflags & FS_XFLAG_DAX)
987 di_flags2 |= XFS_DIFLAG2_DAX;
988 if (xflags & FS_XFLAG_COWEXTSIZE)
989 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
990
991 return di_flags2;
992 }
993
994 STATIC void
995 xfs_diflags_to_linux(
996 struct xfs_inode *ip)
997 {
998 struct inode *inode = VFS_I(ip);
999 unsigned int xflags = xfs_ip2xflags(ip);
1000
1001 if (xflags & FS_XFLAG_IMMUTABLE)
1002 inode->i_flags |= S_IMMUTABLE;
1003 else
1004 inode->i_flags &= ~S_IMMUTABLE;
1005 if (xflags & FS_XFLAG_APPEND)
1006 inode->i_flags |= S_APPEND;
1007 else
1008 inode->i_flags &= ~S_APPEND;
1009 if (xflags & FS_XFLAG_SYNC)
1010 inode->i_flags |= S_SYNC;
1011 else
1012 inode->i_flags &= ~S_SYNC;
1013 if (xflags & FS_XFLAG_NOATIME)
1014 inode->i_flags |= S_NOATIME;
1015 else
1016 inode->i_flags &= ~S_NOATIME;
1017 #if 0 /* disabled until the flag switching races are sorted out */
1018 if (xflags & FS_XFLAG_DAX)
1019 inode->i_flags |= S_DAX;
1020 else
1021 inode->i_flags &= ~S_DAX;
1022 #endif
1023 }
1024
1025 static int
1026 xfs_ioctl_setattr_xflags(
1027 struct xfs_trans *tp,
1028 struct xfs_inode *ip,
1029 struct fsxattr *fa)
1030 {
1031 struct xfs_mount *mp = ip->i_mount;
1032 uint64_t di_flags2;
1033
1034 /* Can't change realtime flag if any extents are allocated. */
1035 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1036 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1037 return -EINVAL;
1038
1039 /* If realtime flag is set then must have realtime device */
1040 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1041 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1042 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1043 return -EINVAL;
1044 }
1045
1046 /* Clear reflink if we are actually able to set the rt flag. */
1047 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1048 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1049
1050 /* Don't allow us to set DAX mode for a reflinked file for now. */
1051 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1052 return -EINVAL;
1053
1054 /*
1055 * Can't modify an immutable/append-only file unless
1056 * we have appropriate permission.
1057 */
1058 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1059 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1060 !capable(CAP_LINUX_IMMUTABLE))
1061 return -EPERM;
1062
1063 /* diflags2 only valid for v3 inodes. */
1064 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1065 if (di_flags2 && ip->i_d.di_version < 3)
1066 return -EINVAL;
1067
1068 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1069 ip->i_d.di_flags2 = di_flags2;
1070
1071 xfs_diflags_to_linux(ip);
1072 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1073 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1074 XFS_STATS_INC(mp, xs_ig_attrchg);
1075 return 0;
1076 }
1077
1078 /*
1079 * If we are changing DAX flags, we have to ensure the file is clean and any
1080 * cached objects in the address space are invalidated and removed. This
1081 * requires us to lock out other IO and page faults similar to a truncate
1082 * operation. The locks need to be held until the transaction has been committed
1083 * so that the cache invalidation is atomic with respect to the DAX flag
1084 * manipulation.
1085 */
1086 static int
1087 xfs_ioctl_setattr_dax_invalidate(
1088 struct xfs_inode *ip,
1089 struct fsxattr *fa,
1090 int *join_flags)
1091 {
1092 struct inode *inode = VFS_I(ip);
1093 struct super_block *sb = inode->i_sb;
1094 int error;
1095
1096 *join_flags = 0;
1097
1098 /*
1099 * It is only valid to set the DAX flag on regular files and
1100 * directories on filesystems where the block size is equal to the page
1101 * size. On directories it serves as an inherit hint.
1102 */
1103 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1104 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1105 return -EINVAL;
1106 if (bdev_dax_supported(sb, sb->s_blocksize) < 0)
1107 return -EINVAL;
1108 }
1109
1110 /* If the DAX state is not changing, we have nothing to do here. */
1111 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1112 return 0;
1113 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1114 return 0;
1115
1116 /* lock, flush and invalidate mapping in preparation for flag change */
1117 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1118 error = filemap_write_and_wait(inode->i_mapping);
1119 if (error)
1120 goto out_unlock;
1121 error = invalidate_inode_pages2(inode->i_mapping);
1122 if (error)
1123 goto out_unlock;
1124
1125 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1126 return 0;
1127
1128 out_unlock:
1129 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1130 return error;
1131
1132 }
1133
1134 /*
1135 * Set up the transaction structure for the setattr operation, checking that we
1136 * have permission to do so. On success, return a clean transaction and the
1137 * inode locked exclusively ready for further operation specific checks. On
1138 * failure, return an error without modifying or locking the inode.
1139 *
1140 * The inode might already be IO locked on call. If this is the case, it is
1141 * indicated in @join_flags and we take full responsibility for ensuring they
1142 * are unlocked from now on. Hence if we have an error here, we still have to
1143 * unlock them. Otherwise, once they are joined to the transaction, they will
1144 * be unlocked on commit/cancel.
1145 */
1146 static struct xfs_trans *
1147 xfs_ioctl_setattr_get_trans(
1148 struct xfs_inode *ip,
1149 int join_flags)
1150 {
1151 struct xfs_mount *mp = ip->i_mount;
1152 struct xfs_trans *tp;
1153 int error = -EROFS;
1154
1155 if (mp->m_flags & XFS_MOUNT_RDONLY)
1156 goto out_unlock;
1157 error = -EIO;
1158 if (XFS_FORCED_SHUTDOWN(mp))
1159 goto out_unlock;
1160
1161 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1162 if (error)
1163 return ERR_PTR(error);
1164
1165 xfs_ilock(ip, XFS_ILOCK_EXCL);
1166 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1167 join_flags = 0;
1168
1169 /*
1170 * CAP_FOWNER overrides the following restrictions:
1171 *
1172 * The user ID of the calling process must be equal to the file owner
1173 * ID, except in cases where the CAP_FSETID capability is applicable.
1174 */
1175 if (!inode_owner_or_capable(VFS_I(ip))) {
1176 error = -EPERM;
1177 goto out_cancel;
1178 }
1179
1180 if (mp->m_flags & XFS_MOUNT_WSYNC)
1181 xfs_trans_set_sync(tp);
1182
1183 return tp;
1184
1185 out_cancel:
1186 xfs_trans_cancel(tp);
1187 out_unlock:
1188 if (join_flags)
1189 xfs_iunlock(ip, join_flags);
1190 return ERR_PTR(error);
1191 }
1192
1193 /*
1194 * extent size hint validation is somewhat cumbersome. Rules are:
1195 *
1196 * 1. extent size hint is only valid for directories and regular files
1197 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1198 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1199 * 4. can only be changed on regular files if no extents are allocated
1200 * 5. can be changed on directories at any time
1201 * 6. extsize hint of 0 turns off hints, clears inode flags.
1202 * 7. Extent size must be a multiple of the appropriate block size.
1203 * 8. for non-realtime files, the extent size hint must be limited
1204 * to half the AG size to avoid alignment extending the extent beyond the
1205 * limits of the AG.
1206 *
1207 * Please keep this function in sync with xfs_scrub_inode_extsize.
1208 */
1209 static int
1210 xfs_ioctl_setattr_check_extsize(
1211 struct xfs_inode *ip,
1212 struct fsxattr *fa)
1213 {
1214 struct xfs_mount *mp = ip->i_mount;
1215
1216 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1217 return -EINVAL;
1218
1219 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1220 !S_ISDIR(VFS_I(ip)->i_mode))
1221 return -EINVAL;
1222
1223 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1224 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1225 return -EINVAL;
1226
1227 if (fa->fsx_extsize != 0) {
1228 xfs_extlen_t size;
1229 xfs_fsblock_t extsize_fsb;
1230
1231 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1232 if (extsize_fsb > MAXEXTLEN)
1233 return -EINVAL;
1234
1235 if (XFS_IS_REALTIME_INODE(ip) ||
1236 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1237 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1238 } else {
1239 size = mp->m_sb.sb_blocksize;
1240 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1241 return -EINVAL;
1242 }
1243
1244 if (fa->fsx_extsize % size)
1245 return -EINVAL;
1246 } else
1247 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1248
1249 return 0;
1250 }
1251
1252 /*
1253 * CoW extent size hint validation rules are:
1254 *
1255 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1256 * The inode does not have to have any shared blocks, but it must be a v3.
1257 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1258 * for a directory, the hint is propagated to new files.
1259 * 3. Can be changed on files & directories at any time.
1260 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1261 * 5. Extent size must be a multiple of the appropriate block size.
1262 * 6. The extent size hint must be limited to half the AG size to avoid
1263 * alignment extending the extent beyond the limits of the AG.
1264 *
1265 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1266 */
1267 static int
1268 xfs_ioctl_setattr_check_cowextsize(
1269 struct xfs_inode *ip,
1270 struct fsxattr *fa)
1271 {
1272 struct xfs_mount *mp = ip->i_mount;
1273
1274 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1275 return 0;
1276
1277 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1278 ip->i_d.di_version != 3)
1279 return -EINVAL;
1280
1281 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1282 return -EINVAL;
1283
1284 if (fa->fsx_cowextsize != 0) {
1285 xfs_extlen_t size;
1286 xfs_fsblock_t cowextsize_fsb;
1287
1288 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1289 if (cowextsize_fsb > MAXEXTLEN)
1290 return -EINVAL;
1291
1292 size = mp->m_sb.sb_blocksize;
1293 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1294 return -EINVAL;
1295
1296 if (fa->fsx_cowextsize % size)
1297 return -EINVAL;
1298 } else
1299 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1300
1301 return 0;
1302 }
1303
1304 static int
1305 xfs_ioctl_setattr_check_projid(
1306 struct xfs_inode *ip,
1307 struct fsxattr *fa)
1308 {
1309 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1310 if (fa->fsx_projid > (uint16_t)-1 &&
1311 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1312 return -EINVAL;
1313
1314 /*
1315 * Project Quota ID state is only allowed to change from within the init
1316 * namespace. Enforce that restriction only if we are trying to change
1317 * the quota ID state. Everything else is allowed in user namespaces.
1318 */
1319 if (current_user_ns() == &init_user_ns)
1320 return 0;
1321
1322 if (xfs_get_projid(ip) != fa->fsx_projid)
1323 return -EINVAL;
1324 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1325 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1326 return -EINVAL;
1327
1328 return 0;
1329 }
1330
1331 STATIC int
1332 xfs_ioctl_setattr(
1333 xfs_inode_t *ip,
1334 struct fsxattr *fa)
1335 {
1336 struct xfs_mount *mp = ip->i_mount;
1337 struct xfs_trans *tp;
1338 struct xfs_dquot *udqp = NULL;
1339 struct xfs_dquot *pdqp = NULL;
1340 struct xfs_dquot *olddquot = NULL;
1341 int code;
1342 int join_flags = 0;
1343
1344 trace_xfs_ioctl_setattr(ip);
1345
1346 code = xfs_ioctl_setattr_check_projid(ip, fa);
1347 if (code)
1348 return code;
1349
1350 /*
1351 * If disk quotas is on, we make sure that the dquots do exist on disk,
1352 * before we start any other transactions. Trying to do this later
1353 * is messy. We don't care to take a readlock to look at the ids
1354 * in inode here, because we can't hold it across the trans_reserve.
1355 * If the IDs do change before we take the ilock, we're covered
1356 * because the i_*dquot fields will get updated anyway.
1357 */
1358 if (XFS_IS_QUOTA_ON(mp)) {
1359 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1360 ip->i_d.di_gid, fa->fsx_projid,
1361 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1362 if (code)
1363 return code;
1364 }
1365
1366 /*
1367 * Changing DAX config may require inode locking for mapping
1368 * invalidation. These need to be held all the way to transaction commit
1369 * or cancel time, so need to be passed through to
1370 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1371 * appropriately.
1372 */
1373 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1374 if (code)
1375 goto error_free_dquots;
1376
1377 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1378 if (IS_ERR(tp)) {
1379 code = PTR_ERR(tp);
1380 goto error_free_dquots;
1381 }
1382
1383
1384 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1385 xfs_get_projid(ip) != fa->fsx_projid) {
1386 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1387 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1388 if (code) /* out of quota */
1389 goto error_trans_cancel;
1390 }
1391
1392 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1393 if (code)
1394 goto error_trans_cancel;
1395
1396 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1397 if (code)
1398 goto error_trans_cancel;
1399
1400 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1401 if (code)
1402 goto error_trans_cancel;
1403
1404 /*
1405 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1406 * overrides the following restrictions:
1407 *
1408 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1409 * successful return from chown()
1410 */
1411
1412 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1413 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1414 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1415
1416 /* Change the ownerships and register project quota modifications */
1417 if (xfs_get_projid(ip) != fa->fsx_projid) {
1418 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1419 olddquot = xfs_qm_vop_chown(tp, ip,
1420 &ip->i_pdquot, pdqp);
1421 }
1422 ASSERT(ip->i_d.di_version > 1);
1423 xfs_set_projid(ip, fa->fsx_projid);
1424 }
1425
1426 /*
1427 * Only set the extent size hint if we've already determined that the
1428 * extent size hint should be set on the inode. If no extent size flags
1429 * are set on the inode then unconditionally clear the extent size hint.
1430 */
1431 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1432 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1433 else
1434 ip->i_d.di_extsize = 0;
1435 if (ip->i_d.di_version == 3 &&
1436 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1437 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1438 mp->m_sb.sb_blocklog;
1439 else
1440 ip->i_d.di_cowextsize = 0;
1441
1442 code = xfs_trans_commit(tp);
1443
1444 /*
1445 * Release any dquot(s) the inode had kept before chown.
1446 */
1447 xfs_qm_dqrele(olddquot);
1448 xfs_qm_dqrele(udqp);
1449 xfs_qm_dqrele(pdqp);
1450
1451 return code;
1452
1453 error_trans_cancel:
1454 xfs_trans_cancel(tp);
1455 error_free_dquots:
1456 xfs_qm_dqrele(udqp);
1457 xfs_qm_dqrele(pdqp);
1458 return code;
1459 }
1460
1461 STATIC int
1462 xfs_ioc_fssetxattr(
1463 xfs_inode_t *ip,
1464 struct file *filp,
1465 void __user *arg)
1466 {
1467 struct fsxattr fa;
1468 int error;
1469
1470 if (copy_from_user(&fa, arg, sizeof(fa)))
1471 return -EFAULT;
1472
1473 error = mnt_want_write_file(filp);
1474 if (error)
1475 return error;
1476 error = xfs_ioctl_setattr(ip, &fa);
1477 mnt_drop_write_file(filp);
1478 return error;
1479 }
1480
1481 STATIC int
1482 xfs_ioc_getxflags(
1483 xfs_inode_t *ip,
1484 void __user *arg)
1485 {
1486 unsigned int flags;
1487
1488 flags = xfs_di2lxflags(ip->i_d.di_flags);
1489 if (copy_to_user(arg, &flags, sizeof(flags)))
1490 return -EFAULT;
1491 return 0;
1492 }
1493
1494 STATIC int
1495 xfs_ioc_setxflags(
1496 struct xfs_inode *ip,
1497 struct file *filp,
1498 void __user *arg)
1499 {
1500 struct xfs_trans *tp;
1501 struct fsxattr fa;
1502 unsigned int flags;
1503 int join_flags = 0;
1504 int error;
1505
1506 if (copy_from_user(&flags, arg, sizeof(flags)))
1507 return -EFAULT;
1508
1509 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1510 FS_NOATIME_FL | FS_NODUMP_FL | \
1511 FS_SYNC_FL))
1512 return -EOPNOTSUPP;
1513
1514 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1515
1516 error = mnt_want_write_file(filp);
1517 if (error)
1518 return error;
1519
1520 /*
1521 * Changing DAX config may require inode locking for mapping
1522 * invalidation. These need to be held all the way to transaction commit
1523 * or cancel time, so need to be passed through to
1524 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1525 * appropriately.
1526 */
1527 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1528 if (error)
1529 goto out_drop_write;
1530
1531 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1532 if (IS_ERR(tp)) {
1533 error = PTR_ERR(tp);
1534 goto out_drop_write;
1535 }
1536
1537 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1538 if (error) {
1539 xfs_trans_cancel(tp);
1540 goto out_drop_write;
1541 }
1542
1543 error = xfs_trans_commit(tp);
1544 out_drop_write:
1545 mnt_drop_write_file(filp);
1546 return error;
1547 }
1548
1549 static bool
1550 xfs_getbmap_format(
1551 struct kgetbmap *p,
1552 struct getbmapx __user *u,
1553 size_t recsize)
1554 {
1555 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1556 put_user(p->bmv_block, &u->bmv_block) ||
1557 put_user(p->bmv_length, &u->bmv_length) ||
1558 put_user(0, &u->bmv_count) ||
1559 put_user(0, &u->bmv_entries))
1560 return false;
1561 if (recsize < sizeof(struct getbmapx))
1562 return true;
1563 if (put_user(0, &u->bmv_iflags) ||
1564 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1565 put_user(0, &u->bmv_unused1) ||
1566 put_user(0, &u->bmv_unused2))
1567 return false;
1568 return true;
1569 }
1570
1571 STATIC int
1572 xfs_ioc_getbmap(
1573 struct file *file,
1574 unsigned int cmd,
1575 void __user *arg)
1576 {
1577 struct getbmapx bmx = { 0 };
1578 struct kgetbmap *buf;
1579 size_t recsize;
1580 int error, i;
1581
1582 switch (cmd) {
1583 case XFS_IOC_GETBMAPA:
1584 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1585 /*FALLTHRU*/
1586 case XFS_IOC_GETBMAP:
1587 if (file->f_mode & FMODE_NOCMTIME)
1588 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1589 /* struct getbmap is a strict subset of struct getbmapx. */
1590 recsize = sizeof(struct getbmap);
1591 break;
1592 case XFS_IOC_GETBMAPX:
1593 recsize = sizeof(struct getbmapx);
1594 break;
1595 default:
1596 return -EINVAL;
1597 }
1598
1599 if (copy_from_user(&bmx, arg, recsize))
1600 return -EFAULT;
1601
1602 if (bmx.bmv_count < 2)
1603 return -EINVAL;
1604 if (bmx.bmv_count > ULONG_MAX / recsize)
1605 return -ENOMEM;
1606
1607 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1608 if (!buf)
1609 return -ENOMEM;
1610
1611 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1612 if (error)
1613 goto out_free_buf;
1614
1615 error = -EFAULT;
1616 if (copy_to_user(arg, &bmx, recsize))
1617 goto out_free_buf;
1618 arg += recsize;
1619
1620 for (i = 0; i < bmx.bmv_entries; i++) {
1621 if (!xfs_getbmap_format(buf + i, arg, recsize))
1622 goto out_free_buf;
1623 arg += recsize;
1624 }
1625
1626 error = 0;
1627 out_free_buf:
1628 kmem_free(buf);
1629 return 0;
1630 }
1631
1632 struct getfsmap_info {
1633 struct xfs_mount *mp;
1634 struct fsmap_head __user *data;
1635 unsigned int idx;
1636 __u32 last_flags;
1637 };
1638
1639 STATIC int
1640 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1641 {
1642 struct getfsmap_info *info = priv;
1643 struct fsmap fm;
1644
1645 trace_xfs_getfsmap_mapping(info->mp, xfm);
1646
1647 info->last_flags = xfm->fmr_flags;
1648 xfs_fsmap_from_internal(&fm, xfm);
1649 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1650 sizeof(struct fsmap)))
1651 return -EFAULT;
1652
1653 return 0;
1654 }
1655
1656 STATIC int
1657 xfs_ioc_getfsmap(
1658 struct xfs_inode *ip,
1659 struct fsmap_head __user *arg)
1660 {
1661 struct getfsmap_info info = { NULL };
1662 struct xfs_fsmap_head xhead = {0};
1663 struct fsmap_head head;
1664 bool aborted = false;
1665 int error;
1666
1667 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1668 return -EFAULT;
1669 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1670 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1671 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1672 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1673 sizeof(head.fmh_keys[1].fmr_reserved)))
1674 return -EINVAL;
1675
1676 xhead.fmh_iflags = head.fmh_iflags;
1677 xhead.fmh_count = head.fmh_count;
1678 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1679 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1680
1681 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1682 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1683
1684 info.mp = ip->i_mount;
1685 info.data = arg;
1686 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1687 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1688 error = 0;
1689 aborted = true;
1690 } else if (error)
1691 return error;
1692
1693 /* If we didn't abort, set the "last" flag in the last fmx */
1694 if (!aborted && info.idx) {
1695 info.last_flags |= FMR_OF_LAST;
1696 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1697 &info.last_flags, sizeof(info.last_flags)))
1698 return -EFAULT;
1699 }
1700
1701 /* copy back header */
1702 head.fmh_entries = xhead.fmh_entries;
1703 head.fmh_oflags = xhead.fmh_oflags;
1704 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1705 return -EFAULT;
1706
1707 return 0;
1708 }
1709
1710 STATIC int
1711 xfs_ioc_scrub_metadata(
1712 struct xfs_inode *ip,
1713 void __user *arg)
1714 {
1715 struct xfs_scrub_metadata scrub;
1716 int error;
1717
1718 if (!capable(CAP_SYS_ADMIN))
1719 return -EPERM;
1720
1721 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1722 return -EFAULT;
1723
1724 error = xfs_scrub_metadata(ip, &scrub);
1725 if (error)
1726 return error;
1727
1728 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1729 return -EFAULT;
1730
1731 return 0;
1732 }
1733
1734 int
1735 xfs_ioc_swapext(
1736 xfs_swapext_t *sxp)
1737 {
1738 xfs_inode_t *ip, *tip;
1739 struct fd f, tmp;
1740 int error = 0;
1741
1742 /* Pull information for the target fd */
1743 f = fdget((int)sxp->sx_fdtarget);
1744 if (!f.file) {
1745 error = -EINVAL;
1746 goto out;
1747 }
1748
1749 if (!(f.file->f_mode & FMODE_WRITE) ||
1750 !(f.file->f_mode & FMODE_READ) ||
1751 (f.file->f_flags & O_APPEND)) {
1752 error = -EBADF;
1753 goto out_put_file;
1754 }
1755
1756 tmp = fdget((int)sxp->sx_fdtmp);
1757 if (!tmp.file) {
1758 error = -EINVAL;
1759 goto out_put_file;
1760 }
1761
1762 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1763 !(tmp.file->f_mode & FMODE_READ) ||
1764 (tmp.file->f_flags & O_APPEND)) {
1765 error = -EBADF;
1766 goto out_put_tmp_file;
1767 }
1768
1769 if (IS_SWAPFILE(file_inode(f.file)) ||
1770 IS_SWAPFILE(file_inode(tmp.file))) {
1771 error = -EINVAL;
1772 goto out_put_tmp_file;
1773 }
1774
1775 /*
1776 * We need to ensure that the fds passed in point to XFS inodes
1777 * before we cast and access them as XFS structures as we have no
1778 * control over what the user passes us here.
1779 */
1780 if (f.file->f_op != &xfs_file_operations ||
1781 tmp.file->f_op != &xfs_file_operations) {
1782 error = -EINVAL;
1783 goto out_put_tmp_file;
1784 }
1785
1786 ip = XFS_I(file_inode(f.file));
1787 tip = XFS_I(file_inode(tmp.file));
1788
1789 if (ip->i_mount != tip->i_mount) {
1790 error = -EINVAL;
1791 goto out_put_tmp_file;
1792 }
1793
1794 if (ip->i_ino == tip->i_ino) {
1795 error = -EINVAL;
1796 goto out_put_tmp_file;
1797 }
1798
1799 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1800 error = -EIO;
1801 goto out_put_tmp_file;
1802 }
1803
1804 error = xfs_swap_extents(ip, tip, sxp);
1805
1806 out_put_tmp_file:
1807 fdput(tmp);
1808 out_put_file:
1809 fdput(f);
1810 out:
1811 return error;
1812 }
1813
1814 /*
1815 * Note: some of the ioctl's return positive numbers as a
1816 * byte count indicating success, such as readlink_by_handle.
1817 * So we don't "sign flip" like most other routines. This means
1818 * true errors need to be returned as a negative value.
1819 */
1820 long
1821 xfs_file_ioctl(
1822 struct file *filp,
1823 unsigned int cmd,
1824 unsigned long p)
1825 {
1826 struct inode *inode = file_inode(filp);
1827 struct xfs_inode *ip = XFS_I(inode);
1828 struct xfs_mount *mp = ip->i_mount;
1829 void __user *arg = (void __user *)p;
1830 int error;
1831
1832 trace_xfs_file_ioctl(ip);
1833
1834 switch (cmd) {
1835 case FITRIM:
1836 return xfs_ioc_trim(mp, arg);
1837 case XFS_IOC_ALLOCSP:
1838 case XFS_IOC_FREESP:
1839 case XFS_IOC_RESVSP:
1840 case XFS_IOC_UNRESVSP:
1841 case XFS_IOC_ALLOCSP64:
1842 case XFS_IOC_FREESP64:
1843 case XFS_IOC_RESVSP64:
1844 case XFS_IOC_UNRESVSP64:
1845 case XFS_IOC_ZERO_RANGE: {
1846 xfs_flock64_t bf;
1847
1848 if (copy_from_user(&bf, arg, sizeof(bf)))
1849 return -EFAULT;
1850 return xfs_ioc_space(filp, cmd, &bf);
1851 }
1852 case XFS_IOC_DIOINFO: {
1853 struct dioattr da;
1854 xfs_buftarg_t *target =
1855 XFS_IS_REALTIME_INODE(ip) ?
1856 mp->m_rtdev_targp : mp->m_ddev_targp;
1857
1858 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1859 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1860
1861 if (copy_to_user(arg, &da, sizeof(da)))
1862 return -EFAULT;
1863 return 0;
1864 }
1865
1866 case XFS_IOC_FSBULKSTAT_SINGLE:
1867 case XFS_IOC_FSBULKSTAT:
1868 case XFS_IOC_FSINUMBERS:
1869 return xfs_ioc_bulkstat(mp, cmd, arg);
1870
1871 case XFS_IOC_FSGEOMETRY_V1:
1872 return xfs_ioc_fsgeometry_v1(mp, arg);
1873
1874 case XFS_IOC_FSGEOMETRY:
1875 return xfs_ioc_fsgeometry(mp, arg);
1876
1877 case XFS_IOC_GETVERSION:
1878 return put_user(inode->i_generation, (int __user *)arg);
1879
1880 case XFS_IOC_FSGETXATTR:
1881 return xfs_ioc_fsgetxattr(ip, 0, arg);
1882 case XFS_IOC_FSGETXATTRA:
1883 return xfs_ioc_fsgetxattr(ip, 1, arg);
1884 case XFS_IOC_FSSETXATTR:
1885 return xfs_ioc_fssetxattr(ip, filp, arg);
1886 case XFS_IOC_GETXFLAGS:
1887 return xfs_ioc_getxflags(ip, arg);
1888 case XFS_IOC_SETXFLAGS:
1889 return xfs_ioc_setxflags(ip, filp, arg);
1890
1891 case XFS_IOC_FSSETDM: {
1892 struct fsdmidata dmi;
1893
1894 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1895 return -EFAULT;
1896
1897 error = mnt_want_write_file(filp);
1898 if (error)
1899 return error;
1900
1901 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1902 dmi.fsd_dmstate);
1903 mnt_drop_write_file(filp);
1904 return error;
1905 }
1906
1907 case XFS_IOC_GETBMAP:
1908 case XFS_IOC_GETBMAPA:
1909 case XFS_IOC_GETBMAPX:
1910 return xfs_ioc_getbmap(filp, cmd, arg);
1911
1912 case FS_IOC_GETFSMAP:
1913 return xfs_ioc_getfsmap(ip, arg);
1914
1915 case XFS_IOC_SCRUB_METADATA:
1916 return xfs_ioc_scrub_metadata(ip, arg);
1917
1918 case XFS_IOC_FD_TO_HANDLE:
1919 case XFS_IOC_PATH_TO_HANDLE:
1920 case XFS_IOC_PATH_TO_FSHANDLE: {
1921 xfs_fsop_handlereq_t hreq;
1922
1923 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1924 return -EFAULT;
1925 return xfs_find_handle(cmd, &hreq);
1926 }
1927 case XFS_IOC_OPEN_BY_HANDLE: {
1928 xfs_fsop_handlereq_t hreq;
1929
1930 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1931 return -EFAULT;
1932 return xfs_open_by_handle(filp, &hreq);
1933 }
1934 case XFS_IOC_FSSETDM_BY_HANDLE:
1935 return xfs_fssetdm_by_handle(filp, arg);
1936
1937 case XFS_IOC_READLINK_BY_HANDLE: {
1938 xfs_fsop_handlereq_t hreq;
1939
1940 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1941 return -EFAULT;
1942 return xfs_readlink_by_handle(filp, &hreq);
1943 }
1944 case XFS_IOC_ATTRLIST_BY_HANDLE:
1945 return xfs_attrlist_by_handle(filp, arg);
1946
1947 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1948 return xfs_attrmulti_by_handle(filp, arg);
1949
1950 case XFS_IOC_SWAPEXT: {
1951 struct xfs_swapext sxp;
1952
1953 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1954 return -EFAULT;
1955 error = mnt_want_write_file(filp);
1956 if (error)
1957 return error;
1958 error = xfs_ioc_swapext(&sxp);
1959 mnt_drop_write_file(filp);
1960 return error;
1961 }
1962
1963 case XFS_IOC_FSCOUNTS: {
1964 xfs_fsop_counts_t out;
1965
1966 error = xfs_fs_counts(mp, &out);
1967 if (error)
1968 return error;
1969
1970 if (copy_to_user(arg, &out, sizeof(out)))
1971 return -EFAULT;
1972 return 0;
1973 }
1974
1975 case XFS_IOC_SET_RESBLKS: {
1976 xfs_fsop_resblks_t inout;
1977 uint64_t in;
1978
1979 if (!capable(CAP_SYS_ADMIN))
1980 return -EPERM;
1981
1982 if (mp->m_flags & XFS_MOUNT_RDONLY)
1983 return -EROFS;
1984
1985 if (copy_from_user(&inout, arg, sizeof(inout)))
1986 return -EFAULT;
1987
1988 error = mnt_want_write_file(filp);
1989 if (error)
1990 return error;
1991
1992 /* input parameter is passed in resblks field of structure */
1993 in = inout.resblks;
1994 error = xfs_reserve_blocks(mp, &in, &inout);
1995 mnt_drop_write_file(filp);
1996 if (error)
1997 return error;
1998
1999 if (copy_to_user(arg, &inout, sizeof(inout)))
2000 return -EFAULT;
2001 return 0;
2002 }
2003
2004 case XFS_IOC_GET_RESBLKS: {
2005 xfs_fsop_resblks_t out;
2006
2007 if (!capable(CAP_SYS_ADMIN))
2008 return -EPERM;
2009
2010 error = xfs_reserve_blocks(mp, NULL, &out);
2011 if (error)
2012 return error;
2013
2014 if (copy_to_user(arg, &out, sizeof(out)))
2015 return -EFAULT;
2016
2017 return 0;
2018 }
2019
2020 case XFS_IOC_FSGROWFSDATA: {
2021 xfs_growfs_data_t in;
2022
2023 if (copy_from_user(&in, arg, sizeof(in)))
2024 return -EFAULT;
2025
2026 error = mnt_want_write_file(filp);
2027 if (error)
2028 return error;
2029 error = xfs_growfs_data(mp, &in);
2030 mnt_drop_write_file(filp);
2031 return error;
2032 }
2033
2034 case XFS_IOC_FSGROWFSLOG: {
2035 xfs_growfs_log_t in;
2036
2037 if (copy_from_user(&in, arg, sizeof(in)))
2038 return -EFAULT;
2039
2040 error = mnt_want_write_file(filp);
2041 if (error)
2042 return error;
2043 error = xfs_growfs_log(mp, &in);
2044 mnt_drop_write_file(filp);
2045 return error;
2046 }
2047
2048 case XFS_IOC_FSGROWFSRT: {
2049 xfs_growfs_rt_t in;
2050
2051 if (copy_from_user(&in, arg, sizeof(in)))
2052 return -EFAULT;
2053
2054 error = mnt_want_write_file(filp);
2055 if (error)
2056 return error;
2057 error = xfs_growfs_rt(mp, &in);
2058 mnt_drop_write_file(filp);
2059 return error;
2060 }
2061
2062 case XFS_IOC_GOINGDOWN: {
2063 uint32_t in;
2064
2065 if (!capable(CAP_SYS_ADMIN))
2066 return -EPERM;
2067
2068 if (get_user(in, (uint32_t __user *)arg))
2069 return -EFAULT;
2070
2071 return xfs_fs_goingdown(mp, in);
2072 }
2073
2074 case XFS_IOC_ERROR_INJECTION: {
2075 xfs_error_injection_t in;
2076
2077 if (!capable(CAP_SYS_ADMIN))
2078 return -EPERM;
2079
2080 if (copy_from_user(&in, arg, sizeof(in)))
2081 return -EFAULT;
2082
2083 return xfs_errortag_add(mp, in.errtag);
2084 }
2085
2086 case XFS_IOC_ERROR_CLEARALL:
2087 if (!capable(CAP_SYS_ADMIN))
2088 return -EPERM;
2089
2090 return xfs_errortag_clearall(mp);
2091
2092 case XFS_IOC_FREE_EOFBLOCKS: {
2093 struct xfs_fs_eofblocks eofb;
2094 struct xfs_eofblocks keofb;
2095
2096 if (!capable(CAP_SYS_ADMIN))
2097 return -EPERM;
2098
2099 if (mp->m_flags & XFS_MOUNT_RDONLY)
2100 return -EROFS;
2101
2102 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2103 return -EFAULT;
2104
2105 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2106 if (error)
2107 return error;
2108
2109 return xfs_icache_free_eofblocks(mp, &keofb);
2110 }
2111
2112 default:
2113 return -ENOTTY;
2114 }
2115 }
CRIS linux kernel tree