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Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
[mirror_ubuntu-bionic-kernel.git] / fs / xfs / linux-2.6 / 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_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_alloc.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_dinode.h"
30 #include "xfs_inode.h"
31 #include "xfs_ioctl.h"
32 #include "xfs_rtalloc.h"
33 #include "xfs_itable.h"
34 #include "xfs_error.h"
35 #include "xfs_attr.h"
36 #include "xfs_bmap.h"
37 #include "xfs_buf_item.h"
38 #include "xfs_utils.h"
39 #include "xfs_dfrag.h"
40 #include "xfs_fsops.h"
41 #include "xfs_vnodeops.h"
42 #include "xfs_discard.h"
43 #include "xfs_quota.h"
44 #include "xfs_inode_item.h"
45 #include "xfs_export.h"
46 #include "xfs_trace.h"
47
48 #include <linux/capability.h>
49 #include <linux/dcache.h>
50 #include <linux/mount.h>
51 #include <linux/namei.h>
52 #include <linux/pagemap.h>
53 #include <linux/slab.h>
54 #include <linux/exportfs.h>
55
56 /*
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
59 *
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
66 */
67 int
68 xfs_find_handle(
69 unsigned int cmd,
70 xfs_fsop_handlereq_t *hreq)
71 {
72 int hsize;
73 xfs_handle_t handle;
74 struct inode *inode;
75 struct file *file = NULL;
76 struct path path;
77 int error;
78 struct xfs_inode *ip;
79
80 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 file = fget(hreq->fd);
82 if (!file)
83 return -EBADF;
84 inode = file->f_path.dentry->d_inode;
85 } else {
86 error = user_lpath((const char __user *)hreq->path, &path);
87 if (error)
88 return error;
89 inode = path.dentry->d_inode;
90 }
91 ip = XFS_I(inode);
92
93 /*
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
96 */
97 error = -EINVAL;
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 goto out_put;
100
101 error = -EBADF;
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
105 goto out_put;
106
107
108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109
110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 /*
112 * This handle only contains an fsid, zero the rest.
113 */
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
116 } else {
117 int lock_mode;
118
119 lock_mode = xfs_ilock_map_shared(ip);
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 = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 xfs_iunlock_map_shared(ip, lock_mode);
126
127 hsize = XFS_HSIZE(handle);
128 }
129
130 error = -EFAULT;
131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
133 goto out_put;
134
135 error = 0;
136
137 out_put:
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 fput(file);
140 else
141 path_put(&path);
142 return error;
143 }
144
145 /*
146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
148 */
149 STATIC int
150 xfs_handle_acceptable(
151 void *context,
152 struct dentry *dentry)
153 {
154 return 1;
155 }
156
157 /*
158 * Convert userspace handle data into a dentry.
159 */
160 struct dentry *
161 xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
164 u32 hlen)
165 {
166 xfs_handle_t handle;
167 struct xfs_fid64 fid;
168
169 /*
170 * Only allow handle opens under a directory.
171 */
172 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
173 return ERR_PTR(-ENOTDIR);
174
175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
182
183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
186
187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
190 }
191
192 STATIC struct dentry *
193 xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196 {
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
198 }
199
200 int
201 xfs_open_by_handle(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
204 {
205 const struct cred *cred = current_cred();
206 int error;
207 int fd;
208 int permflag;
209 struct file *filp;
210 struct inode *inode;
211 struct dentry *dentry;
212
213 if (!capable(CAP_SYS_ADMIN))
214 return -XFS_ERROR(EPERM);
215
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 if (IS_ERR(dentry))
218 return PTR_ERR(dentry);
219 inode = dentry->d_inode;
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 = -XFS_ERROR(EPERM);
224 goto out_dput;
225 }
226
227 #if BITS_PER_LONG != 32
228 hreq->oflags |= O_LARGEFILE;
229 #endif
230
231 /* Put open permission in namei format. */
232 permflag = hreq->oflags;
233 if ((permflag+1) & O_ACCMODE)
234 permflag++;
235 if (permflag & O_TRUNC)
236 permflag |= 2;
237
238 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
239 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
240 error = -XFS_ERROR(EPERM);
241 goto out_dput;
242 }
243
244 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
245 error = -XFS_ERROR(EACCES);
246 goto out_dput;
247 }
248
249 /* Can't write directories. */
250 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
251 error = -XFS_ERROR(EISDIR);
252 goto out_dput;
253 }
254
255 fd = get_unused_fd();
256 if (fd < 0) {
257 error = fd;
258 goto out_dput;
259 }
260
261 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
262 hreq->oflags, cred);
263 if (IS_ERR(filp)) {
264 put_unused_fd(fd);
265 return PTR_ERR(filp);
266 }
267
268 if (inode->i_mode & S_IFREG) {
269 filp->f_flags |= O_NOATIME;
270 filp->f_mode |= FMODE_NOCMTIME;
271 }
272
273 fd_install(fd, filp);
274 return fd;
275
276 out_dput:
277 dput(dentry);
278 return error;
279 }
280
281 /*
282 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
283 * unused first argument.
284 */
285 STATIC int
286 do_readlink(
287 char __user *buffer,
288 int buflen,
289 const char *link)
290 {
291 int len;
292
293 len = PTR_ERR(link);
294 if (IS_ERR(link))
295 goto out;
296
297 len = strlen(link);
298 if (len > (unsigned) buflen)
299 len = buflen;
300 if (copy_to_user(buffer, link, len))
301 len = -EFAULT;
302 out:
303 return len;
304 }
305
306
307 int
308 xfs_readlink_by_handle(
309 struct file *parfilp,
310 xfs_fsop_handlereq_t *hreq)
311 {
312 struct dentry *dentry;
313 __u32 olen;
314 void *link;
315 int error;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -XFS_ERROR(EPERM);
319
320 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
321 if (IS_ERR(dentry))
322 return PTR_ERR(dentry);
323
324 /* Restrict this handle operation to symlinks only. */
325 if (!S_ISLNK(dentry->d_inode->i_mode)) {
326 error = -XFS_ERROR(EINVAL);
327 goto out_dput;
328 }
329
330 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
331 error = -XFS_ERROR(EFAULT);
332 goto out_dput;
333 }
334
335 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
336 if (!link) {
337 error = -XFS_ERROR(ENOMEM);
338 goto out_dput;
339 }
340
341 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
342 if (error)
343 goto out_kfree;
344 error = do_readlink(hreq->ohandle, olen, link);
345 if (error)
346 goto out_kfree;
347
348 out_kfree:
349 kfree(link);
350 out_dput:
351 dput(dentry);
352 return error;
353 }
354
355 STATIC int
356 xfs_fssetdm_by_handle(
357 struct file *parfilp,
358 void __user *arg)
359 {
360 int error;
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
363 struct dentry *dentry;
364
365 if (!capable(CAP_MKNOD))
366 return -XFS_ERROR(EPERM);
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 return -XFS_ERROR(EFAULT);
369
370 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
371 if (IS_ERR(dentry))
372 return PTR_ERR(dentry);
373
374 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
375 error = -XFS_ERROR(EPERM);
376 goto out;
377 }
378
379 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
380 error = -XFS_ERROR(EFAULT);
381 goto out;
382 }
383
384 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
385 fsd.fsd_dmstate);
386
387 out:
388 dput(dentry);
389 return error;
390 }
391
392 STATIC int
393 xfs_attrlist_by_handle(
394 struct file *parfilp,
395 void __user *arg)
396 {
397 int error = -ENOMEM;
398 attrlist_cursor_kern_t *cursor;
399 xfs_fsop_attrlist_handlereq_t al_hreq;
400 struct dentry *dentry;
401 char *kbuf;
402
403 if (!capable(CAP_SYS_ADMIN))
404 return -XFS_ERROR(EPERM);
405 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
406 return -XFS_ERROR(EFAULT);
407 if (al_hreq.buflen > XATTR_LIST_MAX)
408 return -XFS_ERROR(EINVAL);
409
410 /*
411 * Reject flags, only allow namespaces.
412 */
413 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
414 return -XFS_ERROR(EINVAL);
415
416 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
417 if (IS_ERR(dentry))
418 return PTR_ERR(dentry);
419
420 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
421 if (!kbuf)
422 goto out_dput;
423
424 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
425 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
426 al_hreq.flags, cursor);
427 if (error)
428 goto out_kfree;
429
430 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
431 error = -EFAULT;
432
433 out_kfree:
434 kfree(kbuf);
435 out_dput:
436 dput(dentry);
437 return error;
438 }
439
440 int
441 xfs_attrmulti_attr_get(
442 struct inode *inode,
443 unsigned char *name,
444 unsigned char __user *ubuf,
445 __uint32_t *len,
446 __uint32_t flags)
447 {
448 unsigned char *kbuf;
449 int error = EFAULT;
450
451 if (*len > XATTR_SIZE_MAX)
452 return EINVAL;
453 kbuf = kmalloc(*len, GFP_KERNEL);
454 if (!kbuf)
455 return ENOMEM;
456
457 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
458 if (error)
459 goto out_kfree;
460
461 if (copy_to_user(ubuf, kbuf, *len))
462 error = EFAULT;
463
464 out_kfree:
465 kfree(kbuf);
466 return error;
467 }
468
469 int
470 xfs_attrmulti_attr_set(
471 struct inode *inode,
472 unsigned char *name,
473 const unsigned char __user *ubuf,
474 __uint32_t len,
475 __uint32_t flags)
476 {
477 unsigned char *kbuf;
478 int error = EFAULT;
479
480 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
481 return EPERM;
482 if (len > XATTR_SIZE_MAX)
483 return EINVAL;
484
485 kbuf = memdup_user(ubuf, len);
486 if (IS_ERR(kbuf))
487 return PTR_ERR(kbuf);
488
489 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
490
491 return error;
492 }
493
494 int
495 xfs_attrmulti_attr_remove(
496 struct inode *inode,
497 unsigned char *name,
498 __uint32_t flags)
499 {
500 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
501 return EPERM;
502 return xfs_attr_remove(XFS_I(inode), name, flags);
503 }
504
505 STATIC int
506 xfs_attrmulti_by_handle(
507 struct file *parfilp,
508 void __user *arg)
509 {
510 int error;
511 xfs_attr_multiop_t *ops;
512 xfs_fsop_attrmulti_handlereq_t am_hreq;
513 struct dentry *dentry;
514 unsigned int i, size;
515 unsigned char *attr_name;
516
517 if (!capable(CAP_SYS_ADMIN))
518 return -XFS_ERROR(EPERM);
519 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
520 return -XFS_ERROR(EFAULT);
521
522 /* overflow check */
523 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
524 return -E2BIG;
525
526 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
527 if (IS_ERR(dentry))
528 return PTR_ERR(dentry);
529
530 error = E2BIG;
531 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
532 if (!size || size > 16 * PAGE_SIZE)
533 goto out_dput;
534
535 ops = memdup_user(am_hreq.ops, size);
536 if (IS_ERR(ops)) {
537 error = PTR_ERR(ops);
538 goto out_dput;
539 }
540
541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
542 if (!attr_name)
543 goto out_kfree_ops;
544
545 error = 0;
546 for (i = 0; i < am_hreq.opcount; i++) {
547 ops[i].am_error = strncpy_from_user((char *)attr_name,
548 ops[i].am_attrname, MAXNAMELEN);
549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
550 error = -ERANGE;
551 if (ops[i].am_error < 0)
552 break;
553
554 switch (ops[i].am_opcode) {
555 case ATTR_OP_GET:
556 ops[i].am_error = xfs_attrmulti_attr_get(
557 dentry->d_inode, attr_name,
558 ops[i].am_attrvalue, &ops[i].am_length,
559 ops[i].am_flags);
560 break;
561 case ATTR_OP_SET:
562 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
563 if (ops[i].am_error)
564 break;
565 ops[i].am_error = xfs_attrmulti_attr_set(
566 dentry->d_inode, attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
568 ops[i].am_flags);
569 mnt_drop_write(parfilp->f_path.mnt);
570 break;
571 case ATTR_OP_REMOVE:
572 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
573 if (ops[i].am_error)
574 break;
575 ops[i].am_error = xfs_attrmulti_attr_remove(
576 dentry->d_inode, attr_name,
577 ops[i].am_flags);
578 mnt_drop_write(parfilp->f_path.mnt);
579 break;
580 default:
581 ops[i].am_error = EINVAL;
582 }
583 }
584
585 if (copy_to_user(am_hreq.ops, ops, size))
586 error = XFS_ERROR(EFAULT);
587
588 kfree(attr_name);
589 out_kfree_ops:
590 kfree(ops);
591 out_dput:
592 dput(dentry);
593 return -error;
594 }
595
596 int
597 xfs_ioc_space(
598 struct xfs_inode *ip,
599 struct inode *inode,
600 struct file *filp,
601 int ioflags,
602 unsigned int cmd,
603 xfs_flock64_t *bf)
604 {
605 int attr_flags = 0;
606 int error;
607
608 /*
609 * Only allow the sys admin to reserve space unless
610 * unwritten extents are enabled.
611 */
612 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
613 !capable(CAP_SYS_ADMIN))
614 return -XFS_ERROR(EPERM);
615
616 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
617 return -XFS_ERROR(EPERM);
618
619 if (!(filp->f_mode & FMODE_WRITE))
620 return -XFS_ERROR(EBADF);
621
622 if (!S_ISREG(inode->i_mode))
623 return -XFS_ERROR(EINVAL);
624
625 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
626 attr_flags |= XFS_ATTR_NONBLOCK;
627 if (ioflags & IO_INVIS)
628 attr_flags |= XFS_ATTR_DMI;
629
630 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
631 return -error;
632 }
633
634 STATIC int
635 xfs_ioc_bulkstat(
636 xfs_mount_t *mp,
637 unsigned int cmd,
638 void __user *arg)
639 {
640 xfs_fsop_bulkreq_t bulkreq;
641 int count; /* # of records returned */
642 xfs_ino_t inlast; /* last inode number */
643 int done;
644 int error;
645
646 /* done = 1 if there are more stats to get and if bulkstat */
647 /* should be called again (unused here, but used in dmapi) */
648
649 if (!capable(CAP_SYS_ADMIN))
650 return -EPERM;
651
652 if (XFS_FORCED_SHUTDOWN(mp))
653 return -XFS_ERROR(EIO);
654
655 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
656 return -XFS_ERROR(EFAULT);
657
658 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
659 return -XFS_ERROR(EFAULT);
660
661 if ((count = bulkreq.icount) <= 0)
662 return -XFS_ERROR(EINVAL);
663
664 if (bulkreq.ubuffer == NULL)
665 return -XFS_ERROR(EINVAL);
666
667 if (cmd == XFS_IOC_FSINUMBERS)
668 error = xfs_inumbers(mp, &inlast, &count,
669 bulkreq.ubuffer, xfs_inumbers_fmt);
670 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
671 error = xfs_bulkstat_single(mp, &inlast,
672 bulkreq.ubuffer, &done);
673 else /* XFS_IOC_FSBULKSTAT */
674 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
675 sizeof(xfs_bstat_t), bulkreq.ubuffer,
676 &done);
677
678 if (error)
679 return -error;
680
681 if (bulkreq.ocount != NULL) {
682 if (copy_to_user(bulkreq.lastip, &inlast,
683 sizeof(xfs_ino_t)))
684 return -XFS_ERROR(EFAULT);
685
686 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
687 return -XFS_ERROR(EFAULT);
688 }
689
690 return 0;
691 }
692
693 STATIC int
694 xfs_ioc_fsgeometry_v1(
695 xfs_mount_t *mp,
696 void __user *arg)
697 {
698 xfs_fsop_geom_v1_t fsgeo;
699 int error;
700
701 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
702 if (error)
703 return -error;
704
705 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
706 return -XFS_ERROR(EFAULT);
707 return 0;
708 }
709
710 STATIC int
711 xfs_ioc_fsgeometry(
712 xfs_mount_t *mp,
713 void __user *arg)
714 {
715 xfs_fsop_geom_t fsgeo;
716 int error;
717
718 error = xfs_fs_geometry(mp, &fsgeo, 4);
719 if (error)
720 return -error;
721
722 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
723 return -XFS_ERROR(EFAULT);
724 return 0;
725 }
726
727 /*
728 * Linux extended inode flags interface.
729 */
730
731 STATIC unsigned int
732 xfs_merge_ioc_xflags(
733 unsigned int flags,
734 unsigned int start)
735 {
736 unsigned int xflags = start;
737
738 if (flags & FS_IMMUTABLE_FL)
739 xflags |= XFS_XFLAG_IMMUTABLE;
740 else
741 xflags &= ~XFS_XFLAG_IMMUTABLE;
742 if (flags & FS_APPEND_FL)
743 xflags |= XFS_XFLAG_APPEND;
744 else
745 xflags &= ~XFS_XFLAG_APPEND;
746 if (flags & FS_SYNC_FL)
747 xflags |= XFS_XFLAG_SYNC;
748 else
749 xflags &= ~XFS_XFLAG_SYNC;
750 if (flags & FS_NOATIME_FL)
751 xflags |= XFS_XFLAG_NOATIME;
752 else
753 xflags &= ~XFS_XFLAG_NOATIME;
754 if (flags & FS_NODUMP_FL)
755 xflags |= XFS_XFLAG_NODUMP;
756 else
757 xflags &= ~XFS_XFLAG_NODUMP;
758
759 return xflags;
760 }
761
762 STATIC unsigned int
763 xfs_di2lxflags(
764 __uint16_t di_flags)
765 {
766 unsigned int flags = 0;
767
768 if (di_flags & XFS_DIFLAG_IMMUTABLE)
769 flags |= FS_IMMUTABLE_FL;
770 if (di_flags & XFS_DIFLAG_APPEND)
771 flags |= FS_APPEND_FL;
772 if (di_flags & XFS_DIFLAG_SYNC)
773 flags |= FS_SYNC_FL;
774 if (di_flags & XFS_DIFLAG_NOATIME)
775 flags |= FS_NOATIME_FL;
776 if (di_flags & XFS_DIFLAG_NODUMP)
777 flags |= FS_NODUMP_FL;
778 return flags;
779 }
780
781 STATIC int
782 xfs_ioc_fsgetxattr(
783 xfs_inode_t *ip,
784 int attr,
785 void __user *arg)
786 {
787 struct fsxattr fa;
788
789 memset(&fa, 0, sizeof(struct fsxattr));
790
791 xfs_ilock(ip, XFS_ILOCK_SHARED);
792 fa.fsx_xflags = xfs_ip2xflags(ip);
793 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
794 fa.fsx_projid = xfs_get_projid(ip);
795
796 if (attr) {
797 if (ip->i_afp) {
798 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
799 fa.fsx_nextents = ip->i_afp->if_bytes /
800 sizeof(xfs_bmbt_rec_t);
801 else
802 fa.fsx_nextents = ip->i_d.di_anextents;
803 } else
804 fa.fsx_nextents = 0;
805 } else {
806 if (ip->i_df.if_flags & XFS_IFEXTENTS)
807 fa.fsx_nextents = ip->i_df.if_bytes /
808 sizeof(xfs_bmbt_rec_t);
809 else
810 fa.fsx_nextents = ip->i_d.di_nextents;
811 }
812 xfs_iunlock(ip, XFS_ILOCK_SHARED);
813
814 if (copy_to_user(arg, &fa, sizeof(fa)))
815 return -EFAULT;
816 return 0;
817 }
818
819 STATIC void
820 xfs_set_diflags(
821 struct xfs_inode *ip,
822 unsigned int xflags)
823 {
824 unsigned int di_flags;
825
826 /* can't set PREALLOC this way, just preserve it */
827 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
828 if (xflags & XFS_XFLAG_IMMUTABLE)
829 di_flags |= XFS_DIFLAG_IMMUTABLE;
830 if (xflags & XFS_XFLAG_APPEND)
831 di_flags |= XFS_DIFLAG_APPEND;
832 if (xflags & XFS_XFLAG_SYNC)
833 di_flags |= XFS_DIFLAG_SYNC;
834 if (xflags & XFS_XFLAG_NOATIME)
835 di_flags |= XFS_DIFLAG_NOATIME;
836 if (xflags & XFS_XFLAG_NODUMP)
837 di_flags |= XFS_DIFLAG_NODUMP;
838 if (xflags & XFS_XFLAG_PROJINHERIT)
839 di_flags |= XFS_DIFLAG_PROJINHERIT;
840 if (xflags & XFS_XFLAG_NODEFRAG)
841 di_flags |= XFS_DIFLAG_NODEFRAG;
842 if (xflags & XFS_XFLAG_FILESTREAM)
843 di_flags |= XFS_DIFLAG_FILESTREAM;
844 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
845 if (xflags & XFS_XFLAG_RTINHERIT)
846 di_flags |= XFS_DIFLAG_RTINHERIT;
847 if (xflags & XFS_XFLAG_NOSYMLINKS)
848 di_flags |= XFS_DIFLAG_NOSYMLINKS;
849 if (xflags & XFS_XFLAG_EXTSZINHERIT)
850 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
851 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
852 if (xflags & XFS_XFLAG_REALTIME)
853 di_flags |= XFS_DIFLAG_REALTIME;
854 if (xflags & XFS_XFLAG_EXTSIZE)
855 di_flags |= XFS_DIFLAG_EXTSIZE;
856 }
857
858 ip->i_d.di_flags = di_flags;
859 }
860
861 STATIC void
862 xfs_diflags_to_linux(
863 struct xfs_inode *ip)
864 {
865 struct inode *inode = VFS_I(ip);
866 unsigned int xflags = xfs_ip2xflags(ip);
867
868 if (xflags & XFS_XFLAG_IMMUTABLE)
869 inode->i_flags |= S_IMMUTABLE;
870 else
871 inode->i_flags &= ~S_IMMUTABLE;
872 if (xflags & XFS_XFLAG_APPEND)
873 inode->i_flags |= S_APPEND;
874 else
875 inode->i_flags &= ~S_APPEND;
876 if (xflags & XFS_XFLAG_SYNC)
877 inode->i_flags |= S_SYNC;
878 else
879 inode->i_flags &= ~S_SYNC;
880 if (xflags & XFS_XFLAG_NOATIME)
881 inode->i_flags |= S_NOATIME;
882 else
883 inode->i_flags &= ~S_NOATIME;
884 }
885
886 #define FSX_PROJID 1
887 #define FSX_EXTSIZE 2
888 #define FSX_XFLAGS 4
889 #define FSX_NONBLOCK 8
890
891 STATIC int
892 xfs_ioctl_setattr(
893 xfs_inode_t *ip,
894 struct fsxattr *fa,
895 int mask)
896 {
897 struct xfs_mount *mp = ip->i_mount;
898 struct xfs_trans *tp;
899 unsigned int lock_flags = 0;
900 struct xfs_dquot *udqp = NULL;
901 struct xfs_dquot *gdqp = NULL;
902 struct xfs_dquot *olddquot = NULL;
903 int code;
904
905 trace_xfs_ioctl_setattr(ip);
906
907 if (mp->m_flags & XFS_MOUNT_RDONLY)
908 return XFS_ERROR(EROFS);
909 if (XFS_FORCED_SHUTDOWN(mp))
910 return XFS_ERROR(EIO);
911
912 /*
913 * Disallow 32bit project ids when projid32bit feature is not enabled.
914 */
915 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
916 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
917 return XFS_ERROR(EINVAL);
918
919 /*
920 * If disk quotas is on, we make sure that the dquots do exist on disk,
921 * before we start any other transactions. Trying to do this later
922 * is messy. We don't care to take a readlock to look at the ids
923 * in inode here, because we can't hold it across the trans_reserve.
924 * If the IDs do change before we take the ilock, we're covered
925 * because the i_*dquot fields will get updated anyway.
926 */
927 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
928 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
929 ip->i_d.di_gid, fa->fsx_projid,
930 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
931 if (code)
932 return code;
933 }
934
935 /*
936 * For the other attributes, we acquire the inode lock and
937 * first do an error checking pass.
938 */
939 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
940 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
941 if (code)
942 goto error_return;
943
944 lock_flags = XFS_ILOCK_EXCL;
945 xfs_ilock(ip, lock_flags);
946
947 /*
948 * CAP_FOWNER overrides the following restrictions:
949 *
950 * The user ID of the calling process must be equal
951 * to the file owner ID, except in cases where the
952 * CAP_FSETID capability is applicable.
953 */
954 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
955 code = XFS_ERROR(EPERM);
956 goto error_return;
957 }
958
959 /*
960 * Do a quota reservation only if projid is actually going to change.
961 */
962 if (mask & FSX_PROJID) {
963 if (XFS_IS_QUOTA_RUNNING(mp) &&
964 XFS_IS_PQUOTA_ON(mp) &&
965 xfs_get_projid(ip) != fa->fsx_projid) {
966 ASSERT(tp);
967 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
968 capable(CAP_FOWNER) ?
969 XFS_QMOPT_FORCE_RES : 0);
970 if (code) /* out of quota */
971 goto error_return;
972 }
973 }
974
975 if (mask & FSX_EXTSIZE) {
976 /*
977 * Can't change extent size if any extents are allocated.
978 */
979 if (ip->i_d.di_nextents &&
980 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
981 fa->fsx_extsize)) {
982 code = XFS_ERROR(EINVAL); /* EFBIG? */
983 goto error_return;
984 }
985
986 /*
987 * Extent size must be a multiple of the appropriate block
988 * size, if set at all. It must also be smaller than the
989 * maximum extent size supported by the filesystem.
990 *
991 * Also, for non-realtime files, limit the extent size hint to
992 * half the size of the AGs in the filesystem so alignment
993 * doesn't result in extents larger than an AG.
994 */
995 if (fa->fsx_extsize != 0) {
996 xfs_extlen_t size;
997 xfs_fsblock_t extsize_fsb;
998
999 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1000 if (extsize_fsb > MAXEXTLEN) {
1001 code = XFS_ERROR(EINVAL);
1002 goto error_return;
1003 }
1004
1005 if (XFS_IS_REALTIME_INODE(ip) ||
1006 ((mask & FSX_XFLAGS) &&
1007 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1008 size = mp->m_sb.sb_rextsize <<
1009 mp->m_sb.sb_blocklog;
1010 } else {
1011 size = mp->m_sb.sb_blocksize;
1012 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1013 code = XFS_ERROR(EINVAL);
1014 goto error_return;
1015 }
1016 }
1017
1018 if (fa->fsx_extsize % size) {
1019 code = XFS_ERROR(EINVAL);
1020 goto error_return;
1021 }
1022 }
1023 }
1024
1025
1026 if (mask & FSX_XFLAGS) {
1027 /*
1028 * Can't change realtime flag if any extents are allocated.
1029 */
1030 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1031 (XFS_IS_REALTIME_INODE(ip)) !=
1032 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1033 code = XFS_ERROR(EINVAL); /* EFBIG? */
1034 goto error_return;
1035 }
1036
1037 /*
1038 * If realtime flag is set then must have realtime data.
1039 */
1040 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1041 if ((mp->m_sb.sb_rblocks == 0) ||
1042 (mp->m_sb.sb_rextsize == 0) ||
1043 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1044 code = XFS_ERROR(EINVAL);
1045 goto error_return;
1046 }
1047 }
1048
1049 /*
1050 * Can't modify an immutable/append-only file unless
1051 * we have appropriate permission.
1052 */
1053 if ((ip->i_d.di_flags &
1054 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1055 (fa->fsx_xflags &
1056 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1057 !capable(CAP_LINUX_IMMUTABLE)) {
1058 code = XFS_ERROR(EPERM);
1059 goto error_return;
1060 }
1061 }
1062
1063 xfs_trans_ijoin(tp, ip);
1064
1065 /*
1066 * Change file ownership. Must be the owner or privileged.
1067 */
1068 if (mask & FSX_PROJID) {
1069 /*
1070 * CAP_FSETID overrides the following restrictions:
1071 *
1072 * The set-user-ID and set-group-ID bits of a file will be
1073 * cleared upon successful return from chown()
1074 */
1075 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1076 !capable(CAP_FSETID))
1077 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1078
1079 /*
1080 * Change the ownerships and register quota modifications
1081 * in the transaction.
1082 */
1083 if (xfs_get_projid(ip) != fa->fsx_projid) {
1084 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1085 olddquot = xfs_qm_vop_chown(tp, ip,
1086 &ip->i_gdquot, gdqp);
1087 }
1088 xfs_set_projid(ip, fa->fsx_projid);
1089
1090 /*
1091 * We may have to rev the inode as well as
1092 * the superblock version number since projids didn't
1093 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1094 */
1095 if (ip->i_d.di_version == 1)
1096 xfs_bump_ino_vers2(tp, ip);
1097 }
1098
1099 }
1100
1101 if (mask & FSX_EXTSIZE)
1102 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1103 if (mask & FSX_XFLAGS) {
1104 xfs_set_diflags(ip, fa->fsx_xflags);
1105 xfs_diflags_to_linux(ip);
1106 }
1107
1108 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1109 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1110
1111 XFS_STATS_INC(xs_ig_attrchg);
1112
1113 /*
1114 * If this is a synchronous mount, make sure that the
1115 * transaction goes to disk before returning to the user.
1116 * This is slightly sub-optimal in that truncates require
1117 * two sync transactions instead of one for wsync filesystems.
1118 * One for the truncate and one for the timestamps since we
1119 * don't want to change the timestamps unless we're sure the
1120 * truncate worked. Truncates are less than 1% of the laddis
1121 * mix so this probably isn't worth the trouble to optimize.
1122 */
1123 if (mp->m_flags & XFS_MOUNT_WSYNC)
1124 xfs_trans_set_sync(tp);
1125 code = xfs_trans_commit(tp, 0);
1126 xfs_iunlock(ip, lock_flags);
1127
1128 /*
1129 * Release any dquot(s) the inode had kept before chown.
1130 */
1131 xfs_qm_dqrele(olddquot);
1132 xfs_qm_dqrele(udqp);
1133 xfs_qm_dqrele(gdqp);
1134
1135 return code;
1136
1137 error_return:
1138 xfs_qm_dqrele(udqp);
1139 xfs_qm_dqrele(gdqp);
1140 xfs_trans_cancel(tp, 0);
1141 if (lock_flags)
1142 xfs_iunlock(ip, lock_flags);
1143 return code;
1144 }
1145
1146 STATIC int
1147 xfs_ioc_fssetxattr(
1148 xfs_inode_t *ip,
1149 struct file *filp,
1150 void __user *arg)
1151 {
1152 struct fsxattr fa;
1153 unsigned int mask;
1154
1155 if (copy_from_user(&fa, arg, sizeof(fa)))
1156 return -EFAULT;
1157
1158 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1159 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1160 mask |= FSX_NONBLOCK;
1161
1162 return -xfs_ioctl_setattr(ip, &fa, mask);
1163 }
1164
1165 STATIC int
1166 xfs_ioc_getxflags(
1167 xfs_inode_t *ip,
1168 void __user *arg)
1169 {
1170 unsigned int flags;
1171
1172 flags = xfs_di2lxflags(ip->i_d.di_flags);
1173 if (copy_to_user(arg, &flags, sizeof(flags)))
1174 return -EFAULT;
1175 return 0;
1176 }
1177
1178 STATIC int
1179 xfs_ioc_setxflags(
1180 xfs_inode_t *ip,
1181 struct file *filp,
1182 void __user *arg)
1183 {
1184 struct fsxattr fa;
1185 unsigned int flags;
1186 unsigned int mask;
1187
1188 if (copy_from_user(&flags, arg, sizeof(flags)))
1189 return -EFAULT;
1190
1191 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1192 FS_NOATIME_FL | FS_NODUMP_FL | \
1193 FS_SYNC_FL))
1194 return -EOPNOTSUPP;
1195
1196 mask = FSX_XFLAGS;
1197 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1198 mask |= FSX_NONBLOCK;
1199 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1200
1201 return -xfs_ioctl_setattr(ip, &fa, mask);
1202 }
1203
1204 STATIC int
1205 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1206 {
1207 struct getbmap __user *base = *ap;
1208
1209 /* copy only getbmap portion (not getbmapx) */
1210 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1211 return XFS_ERROR(EFAULT);
1212
1213 *ap += sizeof(struct getbmap);
1214 return 0;
1215 }
1216
1217 STATIC int
1218 xfs_ioc_getbmap(
1219 struct xfs_inode *ip,
1220 int ioflags,
1221 unsigned int cmd,
1222 void __user *arg)
1223 {
1224 struct getbmapx bmx;
1225 int error;
1226
1227 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1228 return -XFS_ERROR(EFAULT);
1229
1230 if (bmx.bmv_count < 2)
1231 return -XFS_ERROR(EINVAL);
1232
1233 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1234 if (ioflags & IO_INVIS)
1235 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1236
1237 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1238 (struct getbmap *)arg+1);
1239 if (error)
1240 return -error;
1241
1242 /* copy back header - only size of getbmap */
1243 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1244 return -XFS_ERROR(EFAULT);
1245 return 0;
1246 }
1247
1248 STATIC int
1249 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1250 {
1251 struct getbmapx __user *base = *ap;
1252
1253 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1254 return XFS_ERROR(EFAULT);
1255
1256 *ap += sizeof(struct getbmapx);
1257 return 0;
1258 }
1259
1260 STATIC int
1261 xfs_ioc_getbmapx(
1262 struct xfs_inode *ip,
1263 void __user *arg)
1264 {
1265 struct getbmapx bmx;
1266 int error;
1267
1268 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1269 return -XFS_ERROR(EFAULT);
1270
1271 if (bmx.bmv_count < 2)
1272 return -XFS_ERROR(EINVAL);
1273
1274 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1275 return -XFS_ERROR(EINVAL);
1276
1277 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1278 (struct getbmapx *)arg+1);
1279 if (error)
1280 return -error;
1281
1282 /* copy back header */
1283 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1284 return -XFS_ERROR(EFAULT);
1285
1286 return 0;
1287 }
1288
1289 /*
1290 * Note: some of the ioctl's return positive numbers as a
1291 * byte count indicating success, such as readlink_by_handle.
1292 * So we don't "sign flip" like most other routines. This means
1293 * true errors need to be returned as a negative value.
1294 */
1295 long
1296 xfs_file_ioctl(
1297 struct file *filp,
1298 unsigned int cmd,
1299 unsigned long p)
1300 {
1301 struct inode *inode = filp->f_path.dentry->d_inode;
1302 struct xfs_inode *ip = XFS_I(inode);
1303 struct xfs_mount *mp = ip->i_mount;
1304 void __user *arg = (void __user *)p;
1305 int ioflags = 0;
1306 int error;
1307
1308 if (filp->f_mode & FMODE_NOCMTIME)
1309 ioflags |= IO_INVIS;
1310
1311 trace_xfs_file_ioctl(ip);
1312
1313 switch (cmd) {
1314 case FITRIM:
1315 return xfs_ioc_trim(mp, arg);
1316 case XFS_IOC_ALLOCSP:
1317 case XFS_IOC_FREESP:
1318 case XFS_IOC_RESVSP:
1319 case XFS_IOC_UNRESVSP:
1320 case XFS_IOC_ALLOCSP64:
1321 case XFS_IOC_FREESP64:
1322 case XFS_IOC_RESVSP64:
1323 case XFS_IOC_UNRESVSP64:
1324 case XFS_IOC_ZERO_RANGE: {
1325 xfs_flock64_t bf;
1326
1327 if (copy_from_user(&bf, arg, sizeof(bf)))
1328 return -XFS_ERROR(EFAULT);
1329 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1330 }
1331 case XFS_IOC_DIOINFO: {
1332 struct dioattr da;
1333 xfs_buftarg_t *target =
1334 XFS_IS_REALTIME_INODE(ip) ?
1335 mp->m_rtdev_targp : mp->m_ddev_targp;
1336
1337 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1338 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1339
1340 if (copy_to_user(arg, &da, sizeof(da)))
1341 return -XFS_ERROR(EFAULT);
1342 return 0;
1343 }
1344
1345 case XFS_IOC_FSBULKSTAT_SINGLE:
1346 case XFS_IOC_FSBULKSTAT:
1347 case XFS_IOC_FSINUMBERS:
1348 return xfs_ioc_bulkstat(mp, cmd, arg);
1349
1350 case XFS_IOC_FSGEOMETRY_V1:
1351 return xfs_ioc_fsgeometry_v1(mp, arg);
1352
1353 case XFS_IOC_FSGEOMETRY:
1354 return xfs_ioc_fsgeometry(mp, arg);
1355
1356 case XFS_IOC_GETVERSION:
1357 return put_user(inode->i_generation, (int __user *)arg);
1358
1359 case XFS_IOC_FSGETXATTR:
1360 return xfs_ioc_fsgetxattr(ip, 0, arg);
1361 case XFS_IOC_FSGETXATTRA:
1362 return xfs_ioc_fsgetxattr(ip, 1, arg);
1363 case XFS_IOC_FSSETXATTR:
1364 return xfs_ioc_fssetxattr(ip, filp, arg);
1365 case XFS_IOC_GETXFLAGS:
1366 return xfs_ioc_getxflags(ip, arg);
1367 case XFS_IOC_SETXFLAGS:
1368 return xfs_ioc_setxflags(ip, filp, arg);
1369
1370 case XFS_IOC_FSSETDM: {
1371 struct fsdmidata dmi;
1372
1373 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1374 return -XFS_ERROR(EFAULT);
1375
1376 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1377 dmi.fsd_dmstate);
1378 return -error;
1379 }
1380
1381 case XFS_IOC_GETBMAP:
1382 case XFS_IOC_GETBMAPA:
1383 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1384
1385 case XFS_IOC_GETBMAPX:
1386 return xfs_ioc_getbmapx(ip, arg);
1387
1388 case XFS_IOC_FD_TO_HANDLE:
1389 case XFS_IOC_PATH_TO_HANDLE:
1390 case XFS_IOC_PATH_TO_FSHANDLE: {
1391 xfs_fsop_handlereq_t hreq;
1392
1393 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1394 return -XFS_ERROR(EFAULT);
1395 return xfs_find_handle(cmd, &hreq);
1396 }
1397 case XFS_IOC_OPEN_BY_HANDLE: {
1398 xfs_fsop_handlereq_t hreq;
1399
1400 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1401 return -XFS_ERROR(EFAULT);
1402 return xfs_open_by_handle(filp, &hreq);
1403 }
1404 case XFS_IOC_FSSETDM_BY_HANDLE:
1405 return xfs_fssetdm_by_handle(filp, arg);
1406
1407 case XFS_IOC_READLINK_BY_HANDLE: {
1408 xfs_fsop_handlereq_t hreq;
1409
1410 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1411 return -XFS_ERROR(EFAULT);
1412 return xfs_readlink_by_handle(filp, &hreq);
1413 }
1414 case XFS_IOC_ATTRLIST_BY_HANDLE:
1415 return xfs_attrlist_by_handle(filp, arg);
1416
1417 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1418 return xfs_attrmulti_by_handle(filp, arg);
1419
1420 case XFS_IOC_SWAPEXT: {
1421 struct xfs_swapext sxp;
1422
1423 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1424 return -XFS_ERROR(EFAULT);
1425 error = xfs_swapext(&sxp);
1426 return -error;
1427 }
1428
1429 case XFS_IOC_FSCOUNTS: {
1430 xfs_fsop_counts_t out;
1431
1432 error = xfs_fs_counts(mp, &out);
1433 if (error)
1434 return -error;
1435
1436 if (copy_to_user(arg, &out, sizeof(out)))
1437 return -XFS_ERROR(EFAULT);
1438 return 0;
1439 }
1440
1441 case XFS_IOC_SET_RESBLKS: {
1442 xfs_fsop_resblks_t inout;
1443 __uint64_t in;
1444
1445 if (!capable(CAP_SYS_ADMIN))
1446 return -EPERM;
1447
1448 if (mp->m_flags & XFS_MOUNT_RDONLY)
1449 return -XFS_ERROR(EROFS);
1450
1451 if (copy_from_user(&inout, arg, sizeof(inout)))
1452 return -XFS_ERROR(EFAULT);
1453
1454 /* input parameter is passed in resblks field of structure */
1455 in = inout.resblks;
1456 error = xfs_reserve_blocks(mp, &in, &inout);
1457 if (error)
1458 return -error;
1459
1460 if (copy_to_user(arg, &inout, sizeof(inout)))
1461 return -XFS_ERROR(EFAULT);
1462 return 0;
1463 }
1464
1465 case XFS_IOC_GET_RESBLKS: {
1466 xfs_fsop_resblks_t out;
1467
1468 if (!capable(CAP_SYS_ADMIN))
1469 return -EPERM;
1470
1471 error = xfs_reserve_blocks(mp, NULL, &out);
1472 if (error)
1473 return -error;
1474
1475 if (copy_to_user(arg, &out, sizeof(out)))
1476 return -XFS_ERROR(EFAULT);
1477
1478 return 0;
1479 }
1480
1481 case XFS_IOC_FSGROWFSDATA: {
1482 xfs_growfs_data_t in;
1483
1484 if (copy_from_user(&in, arg, sizeof(in)))
1485 return -XFS_ERROR(EFAULT);
1486
1487 error = xfs_growfs_data(mp, &in);
1488 return -error;
1489 }
1490
1491 case XFS_IOC_FSGROWFSLOG: {
1492 xfs_growfs_log_t in;
1493
1494 if (copy_from_user(&in, arg, sizeof(in)))
1495 return -XFS_ERROR(EFAULT);
1496
1497 error = xfs_growfs_log(mp, &in);
1498 return -error;
1499 }
1500
1501 case XFS_IOC_FSGROWFSRT: {
1502 xfs_growfs_rt_t in;
1503
1504 if (copy_from_user(&in, arg, sizeof(in)))
1505 return -XFS_ERROR(EFAULT);
1506
1507 error = xfs_growfs_rt(mp, &in);
1508 return -error;
1509 }
1510
1511 case XFS_IOC_GOINGDOWN: {
1512 __uint32_t in;
1513
1514 if (!capable(CAP_SYS_ADMIN))
1515 return -EPERM;
1516
1517 if (get_user(in, (__uint32_t __user *)arg))
1518 return -XFS_ERROR(EFAULT);
1519
1520 error = xfs_fs_goingdown(mp, in);
1521 return -error;
1522 }
1523
1524 case XFS_IOC_ERROR_INJECTION: {
1525 xfs_error_injection_t in;
1526
1527 if (!capable(CAP_SYS_ADMIN))
1528 return -EPERM;
1529
1530 if (copy_from_user(&in, arg, sizeof(in)))
1531 return -XFS_ERROR(EFAULT);
1532
1533 error = xfs_errortag_add(in.errtag, mp);
1534 return -error;
1535 }
1536
1537 case XFS_IOC_ERROR_CLEARALL:
1538 if (!capable(CAP_SYS_ADMIN))
1539 return -EPERM;
1540
1541 error = xfs_errortag_clearall(mp, 1);
1542 return -error;
1543
1544 default:
1545 return -ENOTTY;
1546 }
1547 }
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