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Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blobc1c3ef88a260278fb83ca4014a890284b8df5f42
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_log.h"
21 #include "xfs_trans.h"
22 #include "xfs_sb.h"
23 #include "xfs_ag.h"
24 #include "xfs_alloc.h"
25 #include "xfs_mount.h"
26 #include "xfs_bmap_btree.h"
27 #include "xfs_dinode.h"
28 #include "xfs_inode.h"
29 #include "xfs_ioctl.h"
30 #include "xfs_rtalloc.h"
31 #include "xfs_itable.h"
32 #include "xfs_error.h"
33 #include "xfs_attr.h"
34 #include "xfs_bmap.h"
35 #include "xfs_buf_item.h"
36 #include "xfs_utils.h"
37 #include "xfs_dfrag.h"
38 #include "xfs_fsops.h"
39 #include "xfs_vnodeops.h"
40 #include "xfs_discard.h"
41 #include "xfs_quota.h"
42 #include "xfs_inode_item.h"
43 #include "xfs_export.h"
44 #include "xfs_trace.h"
45 #include "xfs_icache.h"
46
47 #include <linux/capability.h>
48 #include <linux/dcache.h>
49 #include <linux/mount.h>
50 #include <linux/namei.h>
51 #include <linux/pagemap.h>
52 #include <linux/slab.h>
53 #include <linux/exportfs.h>
54
55 /*
56 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
57 * a file or fs handle.
58 *
59 * XFS_IOC_PATH_TO_FSHANDLE
60 * returns fs handle for a mount point or path within that mount point
61 * XFS_IOC_FD_TO_HANDLE
62 * returns full handle for a FD opened in user space
63 * XFS_IOC_PATH_TO_HANDLE
64 * returns full handle for a path
65 */
66 int
67 xfs_find_handle(
68 unsigned int cmd,
69 xfs_fsop_handlereq_t *hreq)
70 {
71 int hsize;
72 xfs_handle_t handle;
73 struct inode *inode;
74 struct fd f = {0};
75 struct path path;
76 int error;
77 struct xfs_inode *ip;
78
79 if (cmd == XFS_IOC_FD_TO_HANDLE) {
80 f = fdget(hreq->fd);
81 if (!f.file)
82 return -EBADF;
83 inode = f.file->f_path.dentry->d_inode;
84 } else {
85 error = user_lpath((const char __user *)hreq->path, &path);
86 if (error)
87 return error;
88 inode = path.dentry->d_inode;
89 }
90 ip = XFS_I(inode);
91
92 /*
93 * We can only generate handles for inodes residing on a XFS filesystem,
94 * and only for regular files, directories or symbolic links.
95 */
96 error = -EINVAL;
97 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
98 goto out_put;
99
100 error = -EBADF;
101 if (!S_ISREG(inode->i_mode) &&
102 !S_ISDIR(inode->i_mode) &&
103 !S_ISLNK(inode->i_mode))
104 goto out_put;
105
106
107 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
108
109 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
110 /*
111 * This handle only contains an fsid, zero the rest.
112 */
113 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
114 hsize = sizeof(xfs_fsid_t);
115 } else {
116 int lock_mode;
117
118 lock_mode = xfs_ilock_map_shared(ip);
119 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
120 sizeof(handle.ha_fid.fid_len);
121 handle.ha_fid.fid_pad = 0;
122 handle.ha_fid.fid_gen = ip->i_d.di_gen;
123 handle.ha_fid.fid_ino = ip->i_ino;
124 xfs_iunlock_map_shared(ip, lock_mode);
125
126 hsize = XFS_HSIZE(handle);
127 }
128
129 error = -EFAULT;
130 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
131 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
132 goto out_put;
133
134 error = 0;
135
136 out_put:
137 if (cmd == XFS_IOC_FD_TO_HANDLE)
138 fdput(f);
139 else
140 path_put(&path);
141 return error;
142 }
143
144 /*
145 * No need to do permission checks on the various pathname components
146 * as the handle operations are privileged.
147 */
148 STATIC int
149 xfs_handle_acceptable(
150 void *context,
151 struct dentry *dentry)
152 {
153 return 1;
154 }
155
156 /*
157 * Convert userspace handle data into a dentry.
158 */
159 struct dentry *
160 xfs_handle_to_dentry(
161 struct file *parfilp,
162 void __user *uhandle,
163 u32 hlen)
164 {
165 xfs_handle_t handle;
166 struct xfs_fid64 fid;
167
168 /*
169 * Only allow handle opens under a directory.
170 */
171 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
172 return ERR_PTR(-ENOTDIR);
173
174 if (hlen != sizeof(xfs_handle_t))
175 return ERR_PTR(-EINVAL);
176 if (copy_from_user(&handle, uhandle, hlen))
177 return ERR_PTR(-EFAULT);
178 if (handle.ha_fid.fid_len !=
179 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
180 return ERR_PTR(-EINVAL);
181
182 memset(&fid, 0, sizeof(struct fid));
183 fid.ino = handle.ha_fid.fid_ino;
184 fid.gen = handle.ha_fid.fid_gen;
185
186 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
187 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
188 xfs_handle_acceptable, NULL);
189 }
190
191 STATIC struct dentry *
192 xfs_handlereq_to_dentry(
193 struct file *parfilp,
194 xfs_fsop_handlereq_t *hreq)
195 {
196 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
197 }
198
199 int
200 xfs_open_by_handle(
201 struct file *parfilp,
202 xfs_fsop_handlereq_t *hreq)
203 {
204 const struct cred *cred = current_cred();
205 int error;
206 int fd;
207 int permflag;
208 struct file *filp;
209 struct inode *inode;
210 struct dentry *dentry;
211 fmode_t fmode;
212 struct path path;
213
214 if (!capable(CAP_SYS_ADMIN))
215 return -XFS_ERROR(EPERM);
216
217 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 if (IS_ERR(dentry))
219 return PTR_ERR(dentry);
220 inode = dentry->d_inode;
221
222 /* Restrict xfs_open_by_handle to directories & regular files. */
223 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
224 error = -XFS_ERROR(EPERM);
225 goto out_dput;
226 }
227
228 #if BITS_PER_LONG != 32
229 hreq->oflags |= O_LARGEFILE;
230 #endif
231
232 permflag = hreq->oflags;
233 fmode = OPEN_FMODE(permflag);
234 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
235 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
236 error = -XFS_ERROR(EPERM);
237 goto out_dput;
238 }
239
240 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
241 error = -XFS_ERROR(EACCES);
242 goto out_dput;
243 }
244
245 /* Can't write directories. */
246 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
247 error = -XFS_ERROR(EISDIR);
248 goto out_dput;
249 }
250
251 fd = get_unused_fd();
252 if (fd < 0) {
253 error = fd;
254 goto out_dput;
255 }
256
257 path.mnt = parfilp->f_path.mnt;
258 path.dentry = dentry;
259 filp = dentry_open(&path, hreq->oflags, cred);
260 dput(dentry);
261 if (IS_ERR(filp)) {
262 put_unused_fd(fd);
263 return PTR_ERR(filp);
264 }
265
266 if (S_ISREG(inode->i_mode)) {
267 filp->f_flags |= O_NOATIME;
268 filp->f_mode |= FMODE_NOCMTIME;
269 }
270
271 fd_install(fd, filp);
272 return fd;
273
274 out_dput:
275 dput(dentry);
276 return error;
277 }
278
279 /*
280 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
281 * unused first argument.
282 */
283 STATIC int
284 do_readlink(
285 char __user *buffer,
286 int buflen,
287 const char *link)
288 {
289 int len;
290
291 len = PTR_ERR(link);
292 if (IS_ERR(link))
293 goto out;
294
295 len = strlen(link);
296 if (len > (unsigned) buflen)
297 len = buflen;
298 if (copy_to_user(buffer, link, len))
299 len = -EFAULT;
300 out:
301 return len;
302 }
303
304
305 int
306 xfs_readlink_by_handle(
307 struct file *parfilp,
308 xfs_fsop_handlereq_t *hreq)
309 {
310 struct dentry *dentry;
311 __u32 olen;
312 void *link;
313 int error;
314
315 if (!capable(CAP_SYS_ADMIN))
316 return -XFS_ERROR(EPERM);
317
318 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
319 if (IS_ERR(dentry))
320 return PTR_ERR(dentry);
321
322 /* Restrict this handle operation to symlinks only. */
323 if (!S_ISLNK(dentry->d_inode->i_mode)) {
324 error = -XFS_ERROR(EINVAL);
325 goto out_dput;
326 }
327
328 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
329 error = -XFS_ERROR(EFAULT);
330 goto out_dput;
331 }
332
333 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
334 if (!link) {
335 error = -XFS_ERROR(ENOMEM);
336 goto out_dput;
337 }
338
339 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
340 if (error)
341 goto out_kfree;
342 error = do_readlink(hreq->ohandle, olen, link);
343 if (error)
344 goto out_kfree;
345
346 out_kfree:
347 kfree(link);
348 out_dput:
349 dput(dentry);
350 return error;
351 }
352
353 STATIC int
354 xfs_fssetdm_by_handle(
355 struct file *parfilp,
356 void __user *arg)
357 {
358 int error;
359 struct fsdmidata fsd;
360 xfs_fsop_setdm_handlereq_t dmhreq;
361 struct dentry *dentry;
362
363 if (!capable(CAP_MKNOD))
364 return -XFS_ERROR(EPERM);
365 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
366 return -XFS_ERROR(EFAULT);
367
368 error = mnt_want_write_file(parfilp);
369 if (error)
370 return error;
371
372 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
373 if (IS_ERR(dentry)) {
374 mnt_drop_write_file(parfilp);
375 return PTR_ERR(dentry);
376 }
377
378 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
379 error = -XFS_ERROR(EPERM);
380 goto out;
381 }
382
383 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
384 error = -XFS_ERROR(EFAULT);
385 goto out;
386 }
387
388 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
389 fsd.fsd_dmstate);
390
391 out:
392 mnt_drop_write_file(parfilp);
393 dput(dentry);
394 return error;
395 }
396
397 STATIC int
398 xfs_attrlist_by_handle(
399 struct file *parfilp,
400 void __user *arg)
401 {
402 int error = -ENOMEM;
403 attrlist_cursor_kern_t *cursor;
404 xfs_fsop_attrlist_handlereq_t al_hreq;
405 struct dentry *dentry;
406 char *kbuf;
407
408 if (!capable(CAP_SYS_ADMIN))
409 return -XFS_ERROR(EPERM);
410 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
411 return -XFS_ERROR(EFAULT);
412 if (al_hreq.buflen > XATTR_LIST_MAX)
413 return -XFS_ERROR(EINVAL);
414
415 /*
416 * Reject flags, only allow namespaces.
417 */
418 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
419 return -XFS_ERROR(EINVAL);
420
421 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
422 if (IS_ERR(dentry))
423 return PTR_ERR(dentry);
424
425 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
426 if (!kbuf)
427 goto out_dput;
428
429 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
430 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
431 al_hreq.flags, cursor);
432 if (error)
433 goto out_kfree;
434
435 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
436 error = -EFAULT;
437
438 out_kfree:
439 kfree(kbuf);
440 out_dput:
441 dput(dentry);
442 return error;
443 }
444
445 int
446 xfs_attrmulti_attr_get(
447 struct inode *inode,
448 unsigned char *name,
449 unsigned char __user *ubuf,
450 __uint32_t *len,
451 __uint32_t flags)
452 {
453 unsigned char *kbuf;
454 int error = EFAULT;
455
456 if (*len > XATTR_SIZE_MAX)
457 return EINVAL;
458 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
459 if (!kbuf) {
460 kbuf = kmem_zalloc_large(*len);
461 if (!kbuf)
462 return ENOMEM;
463 }
464
465 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
466 if (error)
467 goto out_kfree;
468
469 if (copy_to_user(ubuf, kbuf, *len))
470 error = EFAULT;
471
472 out_kfree:
473 if (is_vmalloc_addr(kbuf))
474 kmem_free_large(kbuf);
475 else
476 kmem_free(kbuf);
477 return error;
478 }
479
480 int
481 xfs_attrmulti_attr_set(
482 struct inode *inode,
483 unsigned char *name,
484 const unsigned char __user *ubuf,
485 __uint32_t len,
486 __uint32_t flags)
487 {
488 unsigned char *kbuf;
489 int error = EFAULT;
490
491 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
492 return EPERM;
493 if (len > XATTR_SIZE_MAX)
494 return EINVAL;
495
496 kbuf = memdup_user(ubuf, len);
497 if (IS_ERR(kbuf))
498 return PTR_ERR(kbuf);
499
500 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
501
502 return error;
503 }
504
505 int
506 xfs_attrmulti_attr_remove(
507 struct inode *inode,
508 unsigned char *name,
509 __uint32_t flags)
510 {
511 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
512 return EPERM;
513 return xfs_attr_remove(XFS_I(inode), name, flags);
514 }
515
516 STATIC int
517 xfs_attrmulti_by_handle(
518 struct file *parfilp,
519 void __user *arg)
520 {
521 int error;
522 xfs_attr_multiop_t *ops;
523 xfs_fsop_attrmulti_handlereq_t am_hreq;
524 struct dentry *dentry;
525 unsigned int i, size;
526 unsigned char *attr_name;
527
528 if (!capable(CAP_SYS_ADMIN))
529 return -XFS_ERROR(EPERM);
530 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
531 return -XFS_ERROR(EFAULT);
532
533 /* overflow check */
534 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
535 return -E2BIG;
536
537 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
538 if (IS_ERR(dentry))
539 return PTR_ERR(dentry);
540
541 error = E2BIG;
542 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
543 if (!size || size > 16 * PAGE_SIZE)
544 goto out_dput;
545
546 ops = memdup_user(am_hreq.ops, size);
547 if (IS_ERR(ops)) {
548 error = PTR_ERR(ops);
549 goto out_dput;
550 }
551
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 dentry->d_inode, 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 dentry->d_inode, 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 dentry->d_inode, 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 = XFS_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 xfs_inode *ip,
610 struct inode *inode,
611 struct file *filp,
612 int ioflags,
613 unsigned int cmd,
614 xfs_flock64_t *bf)
615 {
616 int attr_flags = 0;
617 int error;
618
619 /*
620 * Only allow the sys admin to reserve space unless
621 * unwritten extents are enabled.
622 */
623 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
624 !capable(CAP_SYS_ADMIN))
625 return -XFS_ERROR(EPERM);
626
627 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
628 return -XFS_ERROR(EPERM);
629
630 if (!(filp->f_mode & FMODE_WRITE))
631 return -XFS_ERROR(EBADF);
632
633 if (!S_ISREG(inode->i_mode))
634 return -XFS_ERROR(EINVAL);
635
636 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
637 attr_flags |= XFS_ATTR_NONBLOCK;
638
639 if (filp->f_flags & O_DSYNC)
640 attr_flags |= XFS_ATTR_SYNC;
641
642 if (ioflags & IO_INVIS)
643 attr_flags |= XFS_ATTR_DMI;
644
645 error = mnt_want_write_file(filp);
646 if (error)
647 return error;
648 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
649 mnt_drop_write_file(filp);
650 return -error;
651 }
652
653 STATIC int
654 xfs_ioc_bulkstat(
655 xfs_mount_t *mp,
656 unsigned int cmd,
657 void __user *arg)
658 {
659 xfs_fsop_bulkreq_t bulkreq;
660 int count; /* # of records returned */
661 xfs_ino_t inlast; /* last inode number */
662 int done;
663 int error;
664
665 /* done = 1 if there are more stats to get and if bulkstat */
666 /* should be called again (unused here, but used in dmapi) */
667
668 if (!capable(CAP_SYS_ADMIN))
669 return -EPERM;
670
671 if (XFS_FORCED_SHUTDOWN(mp))
672 return -XFS_ERROR(EIO);
673
674 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
675 return -XFS_ERROR(EFAULT);
676
677 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
678 return -XFS_ERROR(EFAULT);
679
680 if ((count = bulkreq.icount) <= 0)
681 return -XFS_ERROR(EINVAL);
682
683 if (bulkreq.ubuffer == NULL)
684 return -XFS_ERROR(EINVAL);
685
686 if (cmd == XFS_IOC_FSINUMBERS)
687 error = xfs_inumbers(mp, &inlast, &count,
688 bulkreq.ubuffer, xfs_inumbers_fmt);
689 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
690 error = xfs_bulkstat_single(mp, &inlast,
691 bulkreq.ubuffer, &done);
692 else /* XFS_IOC_FSBULKSTAT */
693 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
694 sizeof(xfs_bstat_t), bulkreq.ubuffer,
695 &done);
696
697 if (error)
698 return -error;
699
700 if (bulkreq.ocount != NULL) {
701 if (copy_to_user(bulkreq.lastip, &inlast,
702 sizeof(xfs_ino_t)))
703 return -XFS_ERROR(EFAULT);
704
705 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
706 return -XFS_ERROR(EFAULT);
707 }
708
709 return 0;
710 }
711
712 STATIC int
713 xfs_ioc_fsgeometry_v1(
714 xfs_mount_t *mp,
715 void __user *arg)
716 {
717 xfs_fsop_geom_t fsgeo;
718 int error;
719
720 error = xfs_fs_geometry(mp, &fsgeo, 3);
721 if (error)
722 return -error;
723
724 /*
725 * Caller should have passed an argument of type
726 * xfs_fsop_geom_v1_t. This is a proper subset of the
727 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
728 */
729 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
730 return -XFS_ERROR(EFAULT);
731 return 0;
732 }
733
734 STATIC int
735 xfs_ioc_fsgeometry(
736 xfs_mount_t *mp,
737 void __user *arg)
738 {
739 xfs_fsop_geom_t fsgeo;
740 int error;
741
742 error = xfs_fs_geometry(mp, &fsgeo, 4);
743 if (error)
744 return -error;
745
746 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
747 return -XFS_ERROR(EFAULT);
748 return 0;
749 }
750
751 /*
752 * Linux extended inode flags interface.
753 */
754
755 STATIC unsigned int
756 xfs_merge_ioc_xflags(
757 unsigned int flags,
758 unsigned int start)
759 {
760 unsigned int xflags = start;
761
762 if (flags & FS_IMMUTABLE_FL)
763 xflags |= XFS_XFLAG_IMMUTABLE;
764 else
765 xflags &= ~XFS_XFLAG_IMMUTABLE;
766 if (flags & FS_APPEND_FL)
767 xflags |= XFS_XFLAG_APPEND;
768 else
769 xflags &= ~XFS_XFLAG_APPEND;
770 if (flags & FS_SYNC_FL)
771 xflags |= XFS_XFLAG_SYNC;
772 else
773 xflags &= ~XFS_XFLAG_SYNC;
774 if (flags & FS_NOATIME_FL)
775 xflags |= XFS_XFLAG_NOATIME;
776 else
777 xflags &= ~XFS_XFLAG_NOATIME;
778 if (flags & FS_NODUMP_FL)
779 xflags |= XFS_XFLAG_NODUMP;
780 else
781 xflags &= ~XFS_XFLAG_NODUMP;
782
783 return xflags;
784 }
785
786 STATIC unsigned int
787 xfs_di2lxflags(
788 __uint16_t di_flags)
789 {
790 unsigned int flags = 0;
791
792 if (di_flags & XFS_DIFLAG_IMMUTABLE)
793 flags |= FS_IMMUTABLE_FL;
794 if (di_flags & XFS_DIFLAG_APPEND)
795 flags |= FS_APPEND_FL;
796 if (di_flags & XFS_DIFLAG_SYNC)
797 flags |= FS_SYNC_FL;
798 if (di_flags & XFS_DIFLAG_NOATIME)
799 flags |= FS_NOATIME_FL;
800 if (di_flags & XFS_DIFLAG_NODUMP)
801 flags |= FS_NODUMP_FL;
802 return flags;
803 }
804
805 STATIC int
806 xfs_ioc_fsgetxattr(
807 xfs_inode_t *ip,
808 int attr,
809 void __user *arg)
810 {
811 struct fsxattr fa;
812
813 memset(&fa, 0, sizeof(struct fsxattr));
814
815 xfs_ilock(ip, XFS_ILOCK_SHARED);
816 fa.fsx_xflags = xfs_ip2xflags(ip);
817 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
818 fa.fsx_projid = xfs_get_projid(ip);
819
820 if (attr) {
821 if (ip->i_afp) {
822 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
823 fa.fsx_nextents = ip->i_afp->if_bytes /
824 sizeof(xfs_bmbt_rec_t);
825 else
826 fa.fsx_nextents = ip->i_d.di_anextents;
827 } else
828 fa.fsx_nextents = 0;
829 } else {
830 if (ip->i_df.if_flags & XFS_IFEXTENTS)
831 fa.fsx_nextents = ip->i_df.if_bytes /
832 sizeof(xfs_bmbt_rec_t);
833 else
834 fa.fsx_nextents = ip->i_d.di_nextents;
835 }
836 xfs_iunlock(ip, XFS_ILOCK_SHARED);
837
838 if (copy_to_user(arg, &fa, sizeof(fa)))
839 return -EFAULT;
840 return 0;
841 }
842
843 STATIC void
844 xfs_set_diflags(
845 struct xfs_inode *ip,
846 unsigned int xflags)
847 {
848 unsigned int di_flags;
849
850 /* can't set PREALLOC this way, just preserve it */
851 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
852 if (xflags & XFS_XFLAG_IMMUTABLE)
853 di_flags |= XFS_DIFLAG_IMMUTABLE;
854 if (xflags & XFS_XFLAG_APPEND)
855 di_flags |= XFS_DIFLAG_APPEND;
856 if (xflags & XFS_XFLAG_SYNC)
857 di_flags |= XFS_DIFLAG_SYNC;
858 if (xflags & XFS_XFLAG_NOATIME)
859 di_flags |= XFS_DIFLAG_NOATIME;
860 if (xflags & XFS_XFLAG_NODUMP)
861 di_flags |= XFS_DIFLAG_NODUMP;
862 if (xflags & XFS_XFLAG_PROJINHERIT)
863 di_flags |= XFS_DIFLAG_PROJINHERIT;
864 if (xflags & XFS_XFLAG_NODEFRAG)
865 di_flags |= XFS_DIFLAG_NODEFRAG;
866 if (xflags & XFS_XFLAG_FILESTREAM)
867 di_flags |= XFS_DIFLAG_FILESTREAM;
868 if (S_ISDIR(ip->i_d.di_mode)) {
869 if (xflags & XFS_XFLAG_RTINHERIT)
870 di_flags |= XFS_DIFLAG_RTINHERIT;
871 if (xflags & XFS_XFLAG_NOSYMLINKS)
872 di_flags |= XFS_DIFLAG_NOSYMLINKS;
873 if (xflags & XFS_XFLAG_EXTSZINHERIT)
874 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
875 } else if (S_ISREG(ip->i_d.di_mode)) {
876 if (xflags & XFS_XFLAG_REALTIME)
877 di_flags |= XFS_DIFLAG_REALTIME;
878 if (xflags & XFS_XFLAG_EXTSIZE)
879 di_flags |= XFS_DIFLAG_EXTSIZE;
880 }
881
882 ip->i_d.di_flags = di_flags;
883 }
884
885 STATIC void
886 xfs_diflags_to_linux(
887 struct xfs_inode *ip)
888 {
889 struct inode *inode = VFS_I(ip);
890 unsigned int xflags = xfs_ip2xflags(ip);
891
892 if (xflags & XFS_XFLAG_IMMUTABLE)
893 inode->i_flags |= S_IMMUTABLE;
894 else
895 inode->i_flags &= ~S_IMMUTABLE;
896 if (xflags & XFS_XFLAG_APPEND)
897 inode->i_flags |= S_APPEND;
898 else
899 inode->i_flags &= ~S_APPEND;
900 if (xflags & XFS_XFLAG_SYNC)
901 inode->i_flags |= S_SYNC;
902 else
903 inode->i_flags &= ~S_SYNC;
904 if (xflags & XFS_XFLAG_NOATIME)
905 inode->i_flags |= S_NOATIME;
906 else
907 inode->i_flags &= ~S_NOATIME;
908 }
909
910 #define FSX_PROJID 1
911 #define FSX_EXTSIZE 2
912 #define FSX_XFLAGS 4
913 #define FSX_NONBLOCK 8
914
915 STATIC int
916 xfs_ioctl_setattr(
917 xfs_inode_t *ip,
918 struct fsxattr *fa,
919 int mask)
920 {
921 struct xfs_mount *mp = ip->i_mount;
922 struct xfs_trans *tp;
923 unsigned int lock_flags = 0;
924 struct xfs_dquot *udqp = NULL;
925 struct xfs_dquot *gdqp = NULL;
926 struct xfs_dquot *olddquot = NULL;
927 int code;
928
929 trace_xfs_ioctl_setattr(ip);
930
931 if (mp->m_flags & XFS_MOUNT_RDONLY)
932 return XFS_ERROR(EROFS);
933 if (XFS_FORCED_SHUTDOWN(mp))
934 return XFS_ERROR(EIO);
935
936 /*
937 * Disallow 32bit project ids when projid32bit feature is not enabled.
938 */
939 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
940 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
941 return XFS_ERROR(EINVAL);
942
943 /*
944 * If disk quotas is on, we make sure that the dquots do exist on disk,
945 * before we start any other transactions. Trying to do this later
946 * is messy. We don't care to take a readlock to look at the ids
947 * in inode here, because we can't hold it across the trans_reserve.
948 * If the IDs do change before we take the ilock, we're covered
949 * because the i_*dquot fields will get updated anyway.
950 */
951 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
952 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
953 ip->i_d.di_gid, fa->fsx_projid,
954 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
955 if (code)
956 return code;
957 }
958
959 /*
960 * For the other attributes, we acquire the inode lock and
961 * first do an error checking pass.
962 */
963 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
964 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
965 if (code)
966 goto error_return;
967
968 lock_flags = XFS_ILOCK_EXCL;
969 xfs_ilock(ip, lock_flags);
970
971 /*
972 * CAP_FOWNER overrides the following restrictions:
973 *
974 * The user ID of the calling process must be equal
975 * to the file owner ID, except in cases where the
976 * CAP_FSETID capability is applicable.
977 */
978 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
979 code = XFS_ERROR(EPERM);
980 goto error_return;
981 }
982
983 /*
984 * Do a quota reservation only if projid is actually going to change.
985 */
986 if (mask & FSX_PROJID) {
987 if (XFS_IS_QUOTA_RUNNING(mp) &&
988 XFS_IS_PQUOTA_ON(mp) &&
989 xfs_get_projid(ip) != fa->fsx_projid) {
990 ASSERT(tp);
991 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
992 capable(CAP_FOWNER) ?
993 XFS_QMOPT_FORCE_RES : 0);
994 if (code) /* out of quota */
995 goto error_return;
996 }
997 }
998
999 if (mask & FSX_EXTSIZE) {
1000 /*
1001 * Can't change extent size if any extents are allocated.
1002 */
1003 if (ip->i_d.di_nextents &&
1004 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1005 fa->fsx_extsize)) {
1006 code = XFS_ERROR(EINVAL); /* EFBIG? */
1007 goto error_return;
1008 }
1009
1010 /*
1011 * Extent size must be a multiple of the appropriate block
1012 * size, if set at all. It must also be smaller than the
1013 * maximum extent size supported by the filesystem.
1014 *
1015 * Also, for non-realtime files, limit the extent size hint to
1016 * half the size of the AGs in the filesystem so alignment
1017 * doesn't result in extents larger than an AG.
1018 */
1019 if (fa->fsx_extsize != 0) {
1020 xfs_extlen_t size;
1021 xfs_fsblock_t extsize_fsb;
1022
1023 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1024 if (extsize_fsb > MAXEXTLEN) {
1025 code = XFS_ERROR(EINVAL);
1026 goto error_return;
1027 }
1028
1029 if (XFS_IS_REALTIME_INODE(ip) ||
1030 ((mask & FSX_XFLAGS) &&
1031 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1032 size = mp->m_sb.sb_rextsize <<
1033 mp->m_sb.sb_blocklog;
1034 } else {
1035 size = mp->m_sb.sb_blocksize;
1036 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1037 code = XFS_ERROR(EINVAL);
1038 goto error_return;
1039 }
1040 }
1041
1042 if (fa->fsx_extsize % size) {
1043 code = XFS_ERROR(EINVAL);
1044 goto error_return;
1045 }
1046 }
1047 }
1048
1049
1050 if (mask & FSX_XFLAGS) {
1051 /*
1052 * Can't change realtime flag if any extents are allocated.
1053 */
1054 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1055 (XFS_IS_REALTIME_INODE(ip)) !=
1056 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1057 code = XFS_ERROR(EINVAL); /* EFBIG? */
1058 goto error_return;
1059 }
1060
1061 /*
1062 * If realtime flag is set then must have realtime data.
1063 */
1064 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1065 if ((mp->m_sb.sb_rblocks == 0) ||
1066 (mp->m_sb.sb_rextsize == 0) ||
1067 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1068 code = XFS_ERROR(EINVAL);
1069 goto error_return;
1070 }
1071 }
1072
1073 /*
1074 * Can't modify an immutable/append-only file unless
1075 * we have appropriate permission.
1076 */
1077 if ((ip->i_d.di_flags &
1078 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1079 (fa->fsx_xflags &
1080 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1081 !capable(CAP_LINUX_IMMUTABLE)) {
1082 code = XFS_ERROR(EPERM);
1083 goto error_return;
1084 }
1085 }
1086
1087 xfs_trans_ijoin(tp, ip, 0);
1088
1089 /*
1090 * Change file ownership. Must be the owner or privileged.
1091 */
1092 if (mask & FSX_PROJID) {
1093 /*
1094 * CAP_FSETID overrides the following restrictions:
1095 *
1096 * The set-user-ID and set-group-ID bits of a file will be
1097 * cleared upon successful return from chown()
1098 */
1099 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1100 !capable(CAP_FSETID))
1101 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1102
1103 /*
1104 * Change the ownerships and register quota modifications
1105 * in the transaction.
1106 */
1107 if (xfs_get_projid(ip) != fa->fsx_projid) {
1108 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1109 olddquot = xfs_qm_vop_chown(tp, ip,
1110 &ip->i_gdquot, gdqp);
1111 }
1112 xfs_set_projid(ip, fa->fsx_projid);
1113
1114 /*
1115 * We may have to rev the inode as well as
1116 * the superblock version number since projids didn't
1117 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1118 */
1119 if (ip->i_d.di_version == 1)
1120 xfs_bump_ino_vers2(tp, ip);
1121 }
1122
1123 }
1124
1125 if (mask & FSX_EXTSIZE)
1126 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1127 if (mask & FSX_XFLAGS) {
1128 xfs_set_diflags(ip, fa->fsx_xflags);
1129 xfs_diflags_to_linux(ip);
1130 }
1131
1132 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1133 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1134
1135 XFS_STATS_INC(xs_ig_attrchg);
1136
1137 /*
1138 * If this is a synchronous mount, make sure that the
1139 * transaction goes to disk before returning to the user.
1140 * This is slightly sub-optimal in that truncates require
1141 * two sync transactions instead of one for wsync filesystems.
1142 * One for the truncate and one for the timestamps since we
1143 * don't want to change the timestamps unless we're sure the
1144 * truncate worked. Truncates are less than 1% of the laddis
1145 * mix so this probably isn't worth the trouble to optimize.
1146 */
1147 if (mp->m_flags & XFS_MOUNT_WSYNC)
1148 xfs_trans_set_sync(tp);
1149 code = xfs_trans_commit(tp, 0);
1150 xfs_iunlock(ip, lock_flags);
1151
1152 /*
1153 * Release any dquot(s) the inode had kept before chown.
1154 */
1155 xfs_qm_dqrele(olddquot);
1156 xfs_qm_dqrele(udqp);
1157 xfs_qm_dqrele(gdqp);
1158
1159 return code;
1160
1161 error_return:
1162 xfs_qm_dqrele(udqp);
1163 xfs_qm_dqrele(gdqp);
1164 xfs_trans_cancel(tp, 0);
1165 if (lock_flags)
1166 xfs_iunlock(ip, lock_flags);
1167 return code;
1168 }
1169
1170 STATIC int
1171 xfs_ioc_fssetxattr(
1172 xfs_inode_t *ip,
1173 struct file *filp,
1174 void __user *arg)
1175 {
1176 struct fsxattr fa;
1177 unsigned int mask;
1178 int error;
1179
1180 if (copy_from_user(&fa, arg, sizeof(fa)))
1181 return -EFAULT;
1182
1183 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1184 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1185 mask |= FSX_NONBLOCK;
1186
1187 error = mnt_want_write_file(filp);
1188 if (error)
1189 return error;
1190 error = xfs_ioctl_setattr(ip, &fa, mask);
1191 mnt_drop_write_file(filp);
1192 return -error;
1193 }
1194
1195 STATIC int
1196 xfs_ioc_getxflags(
1197 xfs_inode_t *ip,
1198 void __user *arg)
1199 {
1200 unsigned int flags;
1201
1202 flags = xfs_di2lxflags(ip->i_d.di_flags);
1203 if (copy_to_user(arg, &flags, sizeof(flags)))
1204 return -EFAULT;
1205 return 0;
1206 }
1207
1208 STATIC int
1209 xfs_ioc_setxflags(
1210 xfs_inode_t *ip,
1211 struct file *filp,
1212 void __user *arg)
1213 {
1214 struct fsxattr fa;
1215 unsigned int flags;
1216 unsigned int mask;
1217 int error;
1218
1219 if (copy_from_user(&flags, arg, sizeof(flags)))
1220 return -EFAULT;
1221
1222 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1223 FS_NOATIME_FL | FS_NODUMP_FL | \
1224 FS_SYNC_FL))
1225 return -EOPNOTSUPP;
1226
1227 mask = FSX_XFLAGS;
1228 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1229 mask |= FSX_NONBLOCK;
1230 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1231
1232 error = mnt_want_write_file(filp);
1233 if (error)
1234 return error;
1235 error = xfs_ioctl_setattr(ip, &fa, mask);
1236 mnt_drop_write_file(filp);
1237 return -error;
1238 }
1239
1240 STATIC int
1241 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1242 {
1243 struct getbmap __user *base = *ap;
1244
1245 /* copy only getbmap portion (not getbmapx) */
1246 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1247 return XFS_ERROR(EFAULT);
1248
1249 *ap += sizeof(struct getbmap);
1250 return 0;
1251 }
1252
1253 STATIC int
1254 xfs_ioc_getbmap(
1255 struct xfs_inode *ip,
1256 int ioflags,
1257 unsigned int cmd,
1258 void __user *arg)
1259 {
1260 struct getbmapx bmx;
1261 int error;
1262
1263 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1264 return -XFS_ERROR(EFAULT);
1265
1266 if (bmx.bmv_count < 2)
1267 return -XFS_ERROR(EINVAL);
1268
1269 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1270 if (ioflags & IO_INVIS)
1271 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1272
1273 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1274 (struct getbmap *)arg+1);
1275 if (error)
1276 return -error;
1277
1278 /* copy back header - only size of getbmap */
1279 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1280 return -XFS_ERROR(EFAULT);
1281 return 0;
1282 }
1283
1284 STATIC int
1285 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1286 {
1287 struct getbmapx __user *base = *ap;
1288
1289 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1290 return XFS_ERROR(EFAULT);
1291
1292 *ap += sizeof(struct getbmapx);
1293 return 0;
1294 }
1295
1296 STATIC int
1297 xfs_ioc_getbmapx(
1298 struct xfs_inode *ip,
1299 void __user *arg)
1300 {
1301 struct getbmapx bmx;
1302 int error;
1303
1304 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1305 return -XFS_ERROR(EFAULT);
1306
1307 if (bmx.bmv_count < 2)
1308 return -XFS_ERROR(EINVAL);
1309
1310 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1311 return -XFS_ERROR(EINVAL);
1312
1313 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1314 (struct getbmapx *)arg+1);
1315 if (error)
1316 return -error;
1317
1318 /* copy back header */
1319 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1320 return -XFS_ERROR(EFAULT);
1321
1322 return 0;
1323 }
1324
1325 /*
1326 * Note: some of the ioctl's return positive numbers as a
1327 * byte count indicating success, such as readlink_by_handle.
1328 * So we don't "sign flip" like most other routines. This means
1329 * true errors need to be returned as a negative value.
1330 */
1331 long
1332 xfs_file_ioctl(
1333 struct file *filp,
1334 unsigned int cmd,
1335 unsigned long p)
1336 {
1337 struct inode *inode = filp->f_path.dentry->d_inode;
1338 struct xfs_inode *ip = XFS_I(inode);
1339 struct xfs_mount *mp = ip->i_mount;
1340 void __user *arg = (void __user *)p;
1341 int ioflags = 0;
1342 int error;
1343
1344 if (filp->f_mode & FMODE_NOCMTIME)
1345 ioflags |= IO_INVIS;
1346
1347 trace_xfs_file_ioctl(ip);
1348
1349 switch (cmd) {
1350 case FITRIM:
1351 return xfs_ioc_trim(mp, arg);
1352 case XFS_IOC_ALLOCSP:
1353 case XFS_IOC_FREESP:
1354 case XFS_IOC_RESVSP:
1355 case XFS_IOC_UNRESVSP:
1356 case XFS_IOC_ALLOCSP64:
1357 case XFS_IOC_FREESP64:
1358 case XFS_IOC_RESVSP64:
1359 case XFS_IOC_UNRESVSP64:
1360 case XFS_IOC_ZERO_RANGE: {
1361 xfs_flock64_t bf;
1362
1363 if (copy_from_user(&bf, arg, sizeof(bf)))
1364 return -XFS_ERROR(EFAULT);
1365 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1366 }
1367 case XFS_IOC_DIOINFO: {
1368 struct dioattr da;
1369 xfs_buftarg_t *target =
1370 XFS_IS_REALTIME_INODE(ip) ?
1371 mp->m_rtdev_targp : mp->m_ddev_targp;
1372
1373 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1374 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1375
1376 if (copy_to_user(arg, &da, sizeof(da)))
1377 return -XFS_ERROR(EFAULT);
1378 return 0;
1379 }
1380
1381 case XFS_IOC_FSBULKSTAT_SINGLE:
1382 case XFS_IOC_FSBULKSTAT:
1383 case XFS_IOC_FSINUMBERS:
1384 return xfs_ioc_bulkstat(mp, cmd, arg);
1385
1386 case XFS_IOC_FSGEOMETRY_V1:
1387 return xfs_ioc_fsgeometry_v1(mp, arg);
1388
1389 case XFS_IOC_FSGEOMETRY:
1390 return xfs_ioc_fsgeometry(mp, arg);
1391
1392 case XFS_IOC_GETVERSION:
1393 return put_user(inode->i_generation, (int __user *)arg);
1394
1395 case XFS_IOC_FSGETXATTR:
1396 return xfs_ioc_fsgetxattr(ip, 0, arg);
1397 case XFS_IOC_FSGETXATTRA:
1398 return xfs_ioc_fsgetxattr(ip, 1, arg);
1399 case XFS_IOC_FSSETXATTR:
1400 return xfs_ioc_fssetxattr(ip, filp, arg);
1401 case XFS_IOC_GETXFLAGS:
1402 return xfs_ioc_getxflags(ip, arg);
1403 case XFS_IOC_SETXFLAGS:
1404 return xfs_ioc_setxflags(ip, filp, arg);
1405
1406 case XFS_IOC_FSSETDM: {
1407 struct fsdmidata dmi;
1408
1409 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1410 return -XFS_ERROR(EFAULT);
1411
1412 error = mnt_want_write_file(filp);
1413 if (error)
1414 return error;
1415
1416 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1417 dmi.fsd_dmstate);
1418 mnt_drop_write_file(filp);
1419 return -error;
1420 }
1421
1422 case XFS_IOC_GETBMAP:
1423 case XFS_IOC_GETBMAPA:
1424 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1425
1426 case XFS_IOC_GETBMAPX:
1427 return xfs_ioc_getbmapx(ip, arg);
1428
1429 case XFS_IOC_FD_TO_HANDLE:
1430 case XFS_IOC_PATH_TO_HANDLE:
1431 case XFS_IOC_PATH_TO_FSHANDLE: {
1432 xfs_fsop_handlereq_t hreq;
1433
1434 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1435 return -XFS_ERROR(EFAULT);
1436 return xfs_find_handle(cmd, &hreq);
1437 }
1438 case XFS_IOC_OPEN_BY_HANDLE: {
1439 xfs_fsop_handlereq_t hreq;
1440
1441 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1442 return -XFS_ERROR(EFAULT);
1443 return xfs_open_by_handle(filp, &hreq);
1444 }
1445 case XFS_IOC_FSSETDM_BY_HANDLE:
1446 return xfs_fssetdm_by_handle(filp, arg);
1447
1448 case XFS_IOC_READLINK_BY_HANDLE: {
1449 xfs_fsop_handlereq_t hreq;
1450
1451 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1452 return -XFS_ERROR(EFAULT);
1453 return xfs_readlink_by_handle(filp, &hreq);
1454 }
1455 case XFS_IOC_ATTRLIST_BY_HANDLE:
1456 return xfs_attrlist_by_handle(filp, arg);
1457
1458 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1459 return xfs_attrmulti_by_handle(filp, arg);
1460
1461 case XFS_IOC_SWAPEXT: {
1462 struct xfs_swapext sxp;
1463
1464 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1465 return -XFS_ERROR(EFAULT);
1466 error = mnt_want_write_file(filp);
1467 if (error)
1468 return error;
1469 error = xfs_swapext(&sxp);
1470 mnt_drop_write_file(filp);
1471 return -error;
1472 }
1473
1474 case XFS_IOC_FSCOUNTS: {
1475 xfs_fsop_counts_t out;
1476
1477 error = xfs_fs_counts(mp, &out);
1478 if (error)
1479 return -error;
1480
1481 if (copy_to_user(arg, &out, sizeof(out)))
1482 return -XFS_ERROR(EFAULT);
1483 return 0;
1484 }
1485
1486 case XFS_IOC_SET_RESBLKS: {
1487 xfs_fsop_resblks_t inout;
1488 __uint64_t in;
1489
1490 if (!capable(CAP_SYS_ADMIN))
1491 return -EPERM;
1492
1493 if (mp->m_flags & XFS_MOUNT_RDONLY)
1494 return -XFS_ERROR(EROFS);
1495
1496 if (copy_from_user(&inout, arg, sizeof(inout)))
1497 return -XFS_ERROR(EFAULT);
1498
1499 error = mnt_want_write_file(filp);
1500 if (error)
1501 return error;
1502
1503 /* input parameter is passed in resblks field of structure */
1504 in = inout.resblks;
1505 error = xfs_reserve_blocks(mp, &in, &inout);
1506 mnt_drop_write_file(filp);
1507 if (error)
1508 return -error;
1509
1510 if (copy_to_user(arg, &inout, sizeof(inout)))
1511 return -XFS_ERROR(EFAULT);
1512 return 0;
1513 }
1514
1515 case XFS_IOC_GET_RESBLKS: {
1516 xfs_fsop_resblks_t out;
1517
1518 if (!capable(CAP_SYS_ADMIN))
1519 return -EPERM;
1520
1521 error = xfs_reserve_blocks(mp, NULL, &out);
1522 if (error)
1523 return -error;
1524
1525 if (copy_to_user(arg, &out, sizeof(out)))
1526 return -XFS_ERROR(EFAULT);
1527
1528 return 0;
1529 }
1530
1531 case XFS_IOC_FSGROWFSDATA: {
1532 xfs_growfs_data_t in;
1533
1534 if (copy_from_user(&in, arg, sizeof(in)))
1535 return -XFS_ERROR(EFAULT);
1536
1537 error = mnt_want_write_file(filp);
1538 if (error)
1539 return error;
1540 error = xfs_growfs_data(mp, &in);
1541 mnt_drop_write_file(filp);
1542 return -error;
1543 }
1544
1545 case XFS_IOC_FSGROWFSLOG: {
1546 xfs_growfs_log_t in;
1547
1548 if (copy_from_user(&in, arg, sizeof(in)))
1549 return -XFS_ERROR(EFAULT);
1550
1551 error = mnt_want_write_file(filp);
1552 if (error)
1553 return error;
1554 error = xfs_growfs_log(mp, &in);
1555 mnt_drop_write_file(filp);
1556 return -error;
1557 }
1558
1559 case XFS_IOC_FSGROWFSRT: {
1560 xfs_growfs_rt_t in;
1561
1562 if (copy_from_user(&in, arg, sizeof(in)))
1563 return -XFS_ERROR(EFAULT);
1564
1565 error = mnt_want_write_file(filp);
1566 if (error)
1567 return error;
1568 error = xfs_growfs_rt(mp, &in);
1569 mnt_drop_write_file(filp);
1570 return -error;
1571 }
1572
1573 case XFS_IOC_GOINGDOWN: {
1574 __uint32_t in;
1575
1576 if (!capable(CAP_SYS_ADMIN))
1577 return -EPERM;
1578
1579 if (get_user(in, (__uint32_t __user *)arg))
1580 return -XFS_ERROR(EFAULT);
1581
1582 error = xfs_fs_goingdown(mp, in);
1583 return -error;
1584 }
1585
1586 case XFS_IOC_ERROR_INJECTION: {
1587 xfs_error_injection_t in;
1588
1589 if (!capable(CAP_SYS_ADMIN))
1590 return -EPERM;
1591
1592 if (copy_from_user(&in, arg, sizeof(in)))
1593 return -XFS_ERROR(EFAULT);
1594
1595 error = xfs_errortag_add(in.errtag, mp);
1596 return -error;
1597 }
1598
1599 case XFS_IOC_ERROR_CLEARALL:
1600 if (!capable(CAP_SYS_ADMIN))
1601 return -EPERM;
1602
1603 error = xfs_errortag_clearall(mp, 1);
1604 return -error;
1605
1606 case XFS_IOC_FREE_EOFBLOCKS: {
1607 struct xfs_eofblocks eofb;
1608
1609 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1610 return -XFS_ERROR(EFAULT);
1611
1612 if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
1613 return -XFS_ERROR(EINVAL);
1614
1615 if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
1616 return -XFS_ERROR(EINVAL);
1617
1618 if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) ||
1619 memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
1620 return -XFS_ERROR(EINVAL);
1621
1622 error = xfs_icache_free_eofblocks(mp, &eofb);
1623 return -error;
1624 }
1625
1626 default:
1627 return -ENOTTY;
1628 }
1629 }
Linux with added FPC-III support