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Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6.git] / fs / xfs / xfs_ioctl.c
blob5e999680094ac87ba68fe21de542525fb2058ee8
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 = file_inode(f.file);
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(file_inode(parfilp)->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 = kmem_zalloc(al_hreq.buflen, KM_SLEEP | KM_MAYFAIL);
426 if (!kbuf) {
427 kbuf = kmem_zalloc_large(al_hreq.buflen);
428 if (!kbuf)
429 goto out_dput;
430 }
431
432 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
433 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
434 al_hreq.flags, cursor);
435 if (error)
436 goto out_kfree;
437
438 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
439 error = -EFAULT;
440
441 out_kfree:
442 if (is_vmalloc_addr(kbuf))
443 kmem_free_large(kbuf);
444 else
445 kmem_free(kbuf);
446 out_dput:
447 dput(dentry);
448 return error;
449 }
450
451 int
452 xfs_attrmulti_attr_get(
453 struct inode *inode,
454 unsigned char *name,
455 unsigned char __user *ubuf,
456 __uint32_t *len,
457 __uint32_t flags)
458 {
459 unsigned char *kbuf;
460 int error = EFAULT;
461
462 if (*len > XATTR_SIZE_MAX)
463 return EINVAL;
464 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
465 if (!kbuf) {
466 kbuf = kmem_zalloc_large(*len);
467 if (!kbuf)
468 return ENOMEM;
469 }
470
471 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
472 if (error)
473 goto out_kfree;
474
475 if (copy_to_user(ubuf, kbuf, *len))
476 error = EFAULT;
477
478 out_kfree:
479 if (is_vmalloc_addr(kbuf))
480 kmem_free_large(kbuf);
481 else
482 kmem_free(kbuf);
483 return error;
484 }
485
486 int
487 xfs_attrmulti_attr_set(
488 struct inode *inode,
489 unsigned char *name,
490 const unsigned char __user *ubuf,
491 __uint32_t len,
492 __uint32_t flags)
493 {
494 unsigned char *kbuf;
495 int error = EFAULT;
496
497 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
498 return EPERM;
499 if (len > XATTR_SIZE_MAX)
500 return EINVAL;
501
502 kbuf = memdup_user(ubuf, len);
503 if (IS_ERR(kbuf))
504 return PTR_ERR(kbuf);
505
506 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
507
508 return error;
509 }
510
511 int
512 xfs_attrmulti_attr_remove(
513 struct inode *inode,
514 unsigned char *name,
515 __uint32_t flags)
516 {
517 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
518 return EPERM;
519 return xfs_attr_remove(XFS_I(inode), name, flags);
520 }
521
522 STATIC int
523 xfs_attrmulti_by_handle(
524 struct file *parfilp,
525 void __user *arg)
526 {
527 int error;
528 xfs_attr_multiop_t *ops;
529 xfs_fsop_attrmulti_handlereq_t am_hreq;
530 struct dentry *dentry;
531 unsigned int i, size;
532 unsigned char *attr_name;
533
534 if (!capable(CAP_SYS_ADMIN))
535 return -XFS_ERROR(EPERM);
536 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
537 return -XFS_ERROR(EFAULT);
538
539 /* overflow check */
540 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
541 return -E2BIG;
542
543 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
544 if (IS_ERR(dentry))
545 return PTR_ERR(dentry);
546
547 error = E2BIG;
548 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
549 if (!size || size > 16 * PAGE_SIZE)
550 goto out_dput;
551
552 ops = memdup_user(am_hreq.ops, size);
553 if (IS_ERR(ops)) {
554 error = PTR_ERR(ops);
555 goto out_dput;
556 }
557
558 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
559 if (!attr_name)
560 goto out_kfree_ops;
561
562 error = 0;
563 for (i = 0; i < am_hreq.opcount; i++) {
564 ops[i].am_error = strncpy_from_user((char *)attr_name,
565 ops[i].am_attrname, MAXNAMELEN);
566 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
567 error = -ERANGE;
568 if (ops[i].am_error < 0)
569 break;
570
571 switch (ops[i].am_opcode) {
572 case ATTR_OP_GET:
573 ops[i].am_error = xfs_attrmulti_attr_get(
574 dentry->d_inode, attr_name,
575 ops[i].am_attrvalue, &ops[i].am_length,
576 ops[i].am_flags);
577 break;
578 case ATTR_OP_SET:
579 ops[i].am_error = mnt_want_write_file(parfilp);
580 if (ops[i].am_error)
581 break;
582 ops[i].am_error = xfs_attrmulti_attr_set(
583 dentry->d_inode, attr_name,
584 ops[i].am_attrvalue, ops[i].am_length,
585 ops[i].am_flags);
586 mnt_drop_write_file(parfilp);
587 break;
588 case ATTR_OP_REMOVE:
589 ops[i].am_error = mnt_want_write_file(parfilp);
590 if (ops[i].am_error)
591 break;
592 ops[i].am_error = xfs_attrmulti_attr_remove(
593 dentry->d_inode, attr_name,
594 ops[i].am_flags);
595 mnt_drop_write_file(parfilp);
596 break;
597 default:
598 ops[i].am_error = EINVAL;
599 }
600 }
601
602 if (copy_to_user(am_hreq.ops, ops, size))
603 error = XFS_ERROR(EFAULT);
604
605 kfree(attr_name);
606 out_kfree_ops:
607 kfree(ops);
608 out_dput:
609 dput(dentry);
610 return -error;
611 }
612
613 int
614 xfs_ioc_space(
615 struct xfs_inode *ip,
616 struct inode *inode,
617 struct file *filp,
618 int ioflags,
619 unsigned int cmd,
620 xfs_flock64_t *bf)
621 {
622 int attr_flags = 0;
623 int error;
624
625 /*
626 * Only allow the sys admin to reserve space unless
627 * unwritten extents are enabled.
628 */
629 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
630 !capable(CAP_SYS_ADMIN))
631 return -XFS_ERROR(EPERM);
632
633 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
634 return -XFS_ERROR(EPERM);
635
636 if (!(filp->f_mode & FMODE_WRITE))
637 return -XFS_ERROR(EBADF);
638
639 if (!S_ISREG(inode->i_mode))
640 return -XFS_ERROR(EINVAL);
641
642 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
643 attr_flags |= XFS_ATTR_NONBLOCK;
644
645 if (filp->f_flags & O_DSYNC)
646 attr_flags |= XFS_ATTR_SYNC;
647
648 if (ioflags & IO_INVIS)
649 attr_flags |= XFS_ATTR_DMI;
650
651 error = mnt_want_write_file(filp);
652 if (error)
653 return error;
654 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
655 mnt_drop_write_file(filp);
656 return -error;
657 }
658
659 STATIC int
660 xfs_ioc_bulkstat(
661 xfs_mount_t *mp,
662 unsigned int cmd,
663 void __user *arg)
664 {
665 xfs_fsop_bulkreq_t bulkreq;
666 int count; /* # of records returned */
667 xfs_ino_t inlast; /* last inode number */
668 int done;
669 int error;
670
671 /* done = 1 if there are more stats to get and if bulkstat */
672 /* should be called again (unused here, but used in dmapi) */
673
674 if (!capable(CAP_SYS_ADMIN))
675 return -EPERM;
676
677 if (XFS_FORCED_SHUTDOWN(mp))
678 return -XFS_ERROR(EIO);
679
680 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
681 return -XFS_ERROR(EFAULT);
682
683 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
684 return -XFS_ERROR(EFAULT);
685
686 if ((count = bulkreq.icount) <= 0)
687 return -XFS_ERROR(EINVAL);
688
689 if (bulkreq.ubuffer == NULL)
690 return -XFS_ERROR(EINVAL);
691
692 if (cmd == XFS_IOC_FSINUMBERS)
693 error = xfs_inumbers(mp, &inlast, &count,
694 bulkreq.ubuffer, xfs_inumbers_fmt);
695 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
696 error = xfs_bulkstat_single(mp, &inlast,
697 bulkreq.ubuffer, &done);
698 else /* XFS_IOC_FSBULKSTAT */
699 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
700 sizeof(xfs_bstat_t), bulkreq.ubuffer,
701 &done);
702
703 if (error)
704 return -error;
705
706 if (bulkreq.ocount != NULL) {
707 if (copy_to_user(bulkreq.lastip, &inlast,
708 sizeof(xfs_ino_t)))
709 return -XFS_ERROR(EFAULT);
710
711 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
712 return -XFS_ERROR(EFAULT);
713 }
714
715 return 0;
716 }
717
718 STATIC int
719 xfs_ioc_fsgeometry_v1(
720 xfs_mount_t *mp,
721 void __user *arg)
722 {
723 xfs_fsop_geom_t fsgeo;
724 int error;
725
726 error = xfs_fs_geometry(mp, &fsgeo, 3);
727 if (error)
728 return -error;
729
730 /*
731 * Caller should have passed an argument of type
732 * xfs_fsop_geom_v1_t. This is a proper subset of the
733 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
734 */
735 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
736 return -XFS_ERROR(EFAULT);
737 return 0;
738 }
739
740 STATIC int
741 xfs_ioc_fsgeometry(
742 xfs_mount_t *mp,
743 void __user *arg)
744 {
745 xfs_fsop_geom_t fsgeo;
746 int error;
747
748 error = xfs_fs_geometry(mp, &fsgeo, 4);
749 if (error)
750 return -error;
751
752 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
753 return -XFS_ERROR(EFAULT);
754 return 0;
755 }
756
757 /*
758 * Linux extended inode flags interface.
759 */
760
761 STATIC unsigned int
762 xfs_merge_ioc_xflags(
763 unsigned int flags,
764 unsigned int start)
765 {
766 unsigned int xflags = start;
767
768 if (flags & FS_IMMUTABLE_FL)
769 xflags |= XFS_XFLAG_IMMUTABLE;
770 else
771 xflags &= ~XFS_XFLAG_IMMUTABLE;
772 if (flags & FS_APPEND_FL)
773 xflags |= XFS_XFLAG_APPEND;
774 else
775 xflags &= ~XFS_XFLAG_APPEND;
776 if (flags & FS_SYNC_FL)
777 xflags |= XFS_XFLAG_SYNC;
778 else
779 xflags &= ~XFS_XFLAG_SYNC;
780 if (flags & FS_NOATIME_FL)
781 xflags |= XFS_XFLAG_NOATIME;
782 else
783 xflags &= ~XFS_XFLAG_NOATIME;
784 if (flags & FS_NODUMP_FL)
785 xflags |= XFS_XFLAG_NODUMP;
786 else
787 xflags &= ~XFS_XFLAG_NODUMP;
788
789 return xflags;
790 }
791
792 STATIC unsigned int
793 xfs_di2lxflags(
794 __uint16_t di_flags)
795 {
796 unsigned int flags = 0;
797
798 if (di_flags & XFS_DIFLAG_IMMUTABLE)
799 flags |= FS_IMMUTABLE_FL;
800 if (di_flags & XFS_DIFLAG_APPEND)
801 flags |= FS_APPEND_FL;
802 if (di_flags & XFS_DIFLAG_SYNC)
803 flags |= FS_SYNC_FL;
804 if (di_flags & XFS_DIFLAG_NOATIME)
805 flags |= FS_NOATIME_FL;
806 if (di_flags & XFS_DIFLAG_NODUMP)
807 flags |= FS_NODUMP_FL;
808 return flags;
809 }
810
811 STATIC int
812 xfs_ioc_fsgetxattr(
813 xfs_inode_t *ip,
814 int attr,
815 void __user *arg)
816 {
817 struct fsxattr fa;
818
819 memset(&fa, 0, sizeof(struct fsxattr));
820
821 xfs_ilock(ip, XFS_ILOCK_SHARED);
822 fa.fsx_xflags = xfs_ip2xflags(ip);
823 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
824 fa.fsx_projid = xfs_get_projid(ip);
825
826 if (attr) {
827 if (ip->i_afp) {
828 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
829 fa.fsx_nextents = ip->i_afp->if_bytes /
830 sizeof(xfs_bmbt_rec_t);
831 else
832 fa.fsx_nextents = ip->i_d.di_anextents;
833 } else
834 fa.fsx_nextents = 0;
835 } else {
836 if (ip->i_df.if_flags & XFS_IFEXTENTS)
837 fa.fsx_nextents = ip->i_df.if_bytes /
838 sizeof(xfs_bmbt_rec_t);
839 else
840 fa.fsx_nextents = ip->i_d.di_nextents;
841 }
842 xfs_iunlock(ip, XFS_ILOCK_SHARED);
843
844 if (copy_to_user(arg, &fa, sizeof(fa)))
845 return -EFAULT;
846 return 0;
847 }
848
849 STATIC void
850 xfs_set_diflags(
851 struct xfs_inode *ip,
852 unsigned int xflags)
853 {
854 unsigned int di_flags;
855
856 /* can't set PREALLOC this way, just preserve it */
857 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
858 if (xflags & XFS_XFLAG_IMMUTABLE)
859 di_flags |= XFS_DIFLAG_IMMUTABLE;
860 if (xflags & XFS_XFLAG_APPEND)
861 di_flags |= XFS_DIFLAG_APPEND;
862 if (xflags & XFS_XFLAG_SYNC)
863 di_flags |= XFS_DIFLAG_SYNC;
864 if (xflags & XFS_XFLAG_NOATIME)
865 di_flags |= XFS_DIFLAG_NOATIME;
866 if (xflags & XFS_XFLAG_NODUMP)
867 di_flags |= XFS_DIFLAG_NODUMP;
868 if (xflags & XFS_XFLAG_PROJINHERIT)
869 di_flags |= XFS_DIFLAG_PROJINHERIT;
870 if (xflags & XFS_XFLAG_NODEFRAG)
871 di_flags |= XFS_DIFLAG_NODEFRAG;
872 if (xflags & XFS_XFLAG_FILESTREAM)
873 di_flags |= XFS_DIFLAG_FILESTREAM;
874 if (S_ISDIR(ip->i_d.di_mode)) {
875 if (xflags & XFS_XFLAG_RTINHERIT)
876 di_flags |= XFS_DIFLAG_RTINHERIT;
877 if (xflags & XFS_XFLAG_NOSYMLINKS)
878 di_flags |= XFS_DIFLAG_NOSYMLINKS;
879 if (xflags & XFS_XFLAG_EXTSZINHERIT)
880 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
881 } else if (S_ISREG(ip->i_d.di_mode)) {
882 if (xflags & XFS_XFLAG_REALTIME)
883 di_flags |= XFS_DIFLAG_REALTIME;
884 if (xflags & XFS_XFLAG_EXTSIZE)
885 di_flags |= XFS_DIFLAG_EXTSIZE;
886 }
887
888 ip->i_d.di_flags = di_flags;
889 }
890
891 STATIC void
892 xfs_diflags_to_linux(
893 struct xfs_inode *ip)
894 {
895 struct inode *inode = VFS_I(ip);
896 unsigned int xflags = xfs_ip2xflags(ip);
897
898 if (xflags & XFS_XFLAG_IMMUTABLE)
899 inode->i_flags |= S_IMMUTABLE;
900 else
901 inode->i_flags &= ~S_IMMUTABLE;
902 if (xflags & XFS_XFLAG_APPEND)
903 inode->i_flags |= S_APPEND;
904 else
905 inode->i_flags &= ~S_APPEND;
906 if (xflags & XFS_XFLAG_SYNC)
907 inode->i_flags |= S_SYNC;
908 else
909 inode->i_flags &= ~S_SYNC;
910 if (xflags & XFS_XFLAG_NOATIME)
911 inode->i_flags |= S_NOATIME;
912 else
913 inode->i_flags &= ~S_NOATIME;
914 }
915
916 #define FSX_PROJID 1
917 #define FSX_EXTSIZE 2
918 #define FSX_XFLAGS 4
919 #define FSX_NONBLOCK 8
920
921 STATIC int
922 xfs_ioctl_setattr(
923 xfs_inode_t *ip,
924 struct fsxattr *fa,
925 int mask)
926 {
927 struct xfs_mount *mp = ip->i_mount;
928 struct xfs_trans *tp;
929 unsigned int lock_flags = 0;
930 struct xfs_dquot *udqp = NULL;
931 struct xfs_dquot *gdqp = NULL;
932 struct xfs_dquot *olddquot = NULL;
933 int code;
934
935 trace_xfs_ioctl_setattr(ip);
936
937 if (mp->m_flags & XFS_MOUNT_RDONLY)
938 return XFS_ERROR(EROFS);
939 if (XFS_FORCED_SHUTDOWN(mp))
940 return XFS_ERROR(EIO);
941
942 /*
943 * Disallow 32bit project ids when projid32bit feature is not enabled.
944 */
945 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
946 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
947 return XFS_ERROR(EINVAL);
948
949 /*
950 * If disk quotas is on, we make sure that the dquots do exist on disk,
951 * before we start any other transactions. Trying to do this later
952 * is messy. We don't care to take a readlock to look at the ids
953 * in inode here, because we can't hold it across the trans_reserve.
954 * If the IDs do change before we take the ilock, we're covered
955 * because the i_*dquot fields will get updated anyway.
956 */
957 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
958 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
959 ip->i_d.di_gid, fa->fsx_projid,
960 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
961 if (code)
962 return code;
963 }
964
965 /*
966 * For the other attributes, we acquire the inode lock and
967 * first do an error checking pass.
968 */
969 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
970 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
971 if (code)
972 goto error_return;
973
974 lock_flags = XFS_ILOCK_EXCL;
975 xfs_ilock(ip, lock_flags);
976
977 /*
978 * CAP_FOWNER overrides the following restrictions:
979 *
980 * The user ID of the calling process must be equal
981 * to the file owner ID, except in cases where the
982 * CAP_FSETID capability is applicable.
983 */
984 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
985 code = XFS_ERROR(EPERM);
986 goto error_return;
987 }
988
989 /*
990 * Do a quota reservation only if projid is actually going to change.
991 */
992 if (mask & FSX_PROJID) {
993 if (XFS_IS_QUOTA_RUNNING(mp) &&
994 XFS_IS_PQUOTA_ON(mp) &&
995 xfs_get_projid(ip) != fa->fsx_projid) {
996 ASSERT(tp);
997 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
998 capable(CAP_FOWNER) ?
999 XFS_QMOPT_FORCE_RES : 0);
1000 if (code) /* out of quota */
1001 goto error_return;
1002 }
1003 }
1004
1005 if (mask & FSX_EXTSIZE) {
1006 /*
1007 * Can't change extent size if any extents are allocated.
1008 */
1009 if (ip->i_d.di_nextents &&
1010 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1011 fa->fsx_extsize)) {
1012 code = XFS_ERROR(EINVAL); /* EFBIG? */
1013 goto error_return;
1014 }
1015
1016 /*
1017 * Extent size must be a multiple of the appropriate block
1018 * size, if set at all. It must also be smaller than the
1019 * maximum extent size supported by the filesystem.
1020 *
1021 * Also, for non-realtime files, limit the extent size hint to
1022 * half the size of the AGs in the filesystem so alignment
1023 * doesn't result in extents larger than an AG.
1024 */
1025 if (fa->fsx_extsize != 0) {
1026 xfs_extlen_t size;
1027 xfs_fsblock_t extsize_fsb;
1028
1029 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1030 if (extsize_fsb > MAXEXTLEN) {
1031 code = XFS_ERROR(EINVAL);
1032 goto error_return;
1033 }
1034
1035 if (XFS_IS_REALTIME_INODE(ip) ||
1036 ((mask & FSX_XFLAGS) &&
1037 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1038 size = mp->m_sb.sb_rextsize <<
1039 mp->m_sb.sb_blocklog;
1040 } else {
1041 size = mp->m_sb.sb_blocksize;
1042 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1043 code = XFS_ERROR(EINVAL);
1044 goto error_return;
1045 }
1046 }
1047
1048 if (fa->fsx_extsize % size) {
1049 code = XFS_ERROR(EINVAL);
1050 goto error_return;
1051 }
1052 }
1053 }
1054
1055
1056 if (mask & FSX_XFLAGS) {
1057 /*
1058 * Can't change realtime flag if any extents are allocated.
1059 */
1060 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1061 (XFS_IS_REALTIME_INODE(ip)) !=
1062 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1063 code = XFS_ERROR(EINVAL); /* EFBIG? */
1064 goto error_return;
1065 }
1066
1067 /*
1068 * If realtime flag is set then must have realtime data.
1069 */
1070 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1071 if ((mp->m_sb.sb_rblocks == 0) ||
1072 (mp->m_sb.sb_rextsize == 0) ||
1073 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1074 code = XFS_ERROR(EINVAL);
1075 goto error_return;
1076 }
1077 }
1078
1079 /*
1080 * Can't modify an immutable/append-only file unless
1081 * we have appropriate permission.
1082 */
1083 if ((ip->i_d.di_flags &
1084 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1085 (fa->fsx_xflags &
1086 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1087 !capable(CAP_LINUX_IMMUTABLE)) {
1088 code = XFS_ERROR(EPERM);
1089 goto error_return;
1090 }
1091 }
1092
1093 xfs_trans_ijoin(tp, ip, 0);
1094
1095 /*
1096 * Change file ownership. Must be the owner or privileged.
1097 */
1098 if (mask & FSX_PROJID) {
1099 /*
1100 * CAP_FSETID overrides the following restrictions:
1101 *
1102 * The set-user-ID and set-group-ID bits of a file will be
1103 * cleared upon successful return from chown()
1104 */
1105 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1106 !capable(CAP_FSETID))
1107 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1108
1109 /*
1110 * Change the ownerships and register quota modifications
1111 * in the transaction.
1112 */
1113 if (xfs_get_projid(ip) != fa->fsx_projid) {
1114 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1115 olddquot = xfs_qm_vop_chown(tp, ip,
1116 &ip->i_gdquot, gdqp);
1117 }
1118 xfs_set_projid(ip, fa->fsx_projid);
1119
1120 /*
1121 * We may have to rev the inode as well as
1122 * the superblock version number since projids didn't
1123 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1124 */
1125 if (ip->i_d.di_version == 1)
1126 xfs_bump_ino_vers2(tp, ip);
1127 }
1128
1129 }
1130
1131 if (mask & FSX_EXTSIZE)
1132 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1133 if (mask & FSX_XFLAGS) {
1134 xfs_set_diflags(ip, fa->fsx_xflags);
1135 xfs_diflags_to_linux(ip);
1136 }
1137
1138 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1139 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1140
1141 XFS_STATS_INC(xs_ig_attrchg);
1142
1143 /*
1144 * If this is a synchronous mount, make sure that the
1145 * transaction goes to disk before returning to the user.
1146 * This is slightly sub-optimal in that truncates require
1147 * two sync transactions instead of one for wsync filesystems.
1148 * One for the truncate and one for the timestamps since we
1149 * don't want to change the timestamps unless we're sure the
1150 * truncate worked. Truncates are less than 1% of the laddis
1151 * mix so this probably isn't worth the trouble to optimize.
1152 */
1153 if (mp->m_flags & XFS_MOUNT_WSYNC)
1154 xfs_trans_set_sync(tp);
1155 code = xfs_trans_commit(tp, 0);
1156 xfs_iunlock(ip, lock_flags);
1157
1158 /*
1159 * Release any dquot(s) the inode had kept before chown.
1160 */
1161 xfs_qm_dqrele(olddquot);
1162 xfs_qm_dqrele(udqp);
1163 xfs_qm_dqrele(gdqp);
1164
1165 return code;
1166
1167 error_return:
1168 xfs_qm_dqrele(udqp);
1169 xfs_qm_dqrele(gdqp);
1170 xfs_trans_cancel(tp, 0);
1171 if (lock_flags)
1172 xfs_iunlock(ip, lock_flags);
1173 return code;
1174 }
1175
1176 STATIC int
1177 xfs_ioc_fssetxattr(
1178 xfs_inode_t *ip,
1179 struct file *filp,
1180 void __user *arg)
1181 {
1182 struct fsxattr fa;
1183 unsigned int mask;
1184 int error;
1185
1186 if (copy_from_user(&fa, arg, sizeof(fa)))
1187 return -EFAULT;
1188
1189 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1190 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1191 mask |= FSX_NONBLOCK;
1192
1193 error = mnt_want_write_file(filp);
1194 if (error)
1195 return error;
1196 error = xfs_ioctl_setattr(ip, &fa, mask);
1197 mnt_drop_write_file(filp);
1198 return -error;
1199 }
1200
1201 STATIC int
1202 xfs_ioc_getxflags(
1203 xfs_inode_t *ip,
1204 void __user *arg)
1205 {
1206 unsigned int flags;
1207
1208 flags = xfs_di2lxflags(ip->i_d.di_flags);
1209 if (copy_to_user(arg, &flags, sizeof(flags)))
1210 return -EFAULT;
1211 return 0;
1212 }
1213
1214 STATIC int
1215 xfs_ioc_setxflags(
1216 xfs_inode_t *ip,
1217 struct file *filp,
1218 void __user *arg)
1219 {
1220 struct fsxattr fa;
1221 unsigned int flags;
1222 unsigned int mask;
1223 int error;
1224
1225 if (copy_from_user(&flags, arg, sizeof(flags)))
1226 return -EFAULT;
1227
1228 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1229 FS_NOATIME_FL | FS_NODUMP_FL | \
1230 FS_SYNC_FL))
1231 return -EOPNOTSUPP;
1232
1233 mask = FSX_XFLAGS;
1234 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1235 mask |= FSX_NONBLOCK;
1236 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1237
1238 error = mnt_want_write_file(filp);
1239 if (error)
1240 return error;
1241 error = xfs_ioctl_setattr(ip, &fa, mask);
1242 mnt_drop_write_file(filp);
1243 return -error;
1244 }
1245
1246 STATIC int
1247 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1248 {
1249 struct getbmap __user *base = *ap;
1250
1251 /* copy only getbmap portion (not getbmapx) */
1252 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1253 return XFS_ERROR(EFAULT);
1254
1255 *ap += sizeof(struct getbmap);
1256 return 0;
1257 }
1258
1259 STATIC int
1260 xfs_ioc_getbmap(
1261 struct xfs_inode *ip,
1262 int ioflags,
1263 unsigned int cmd,
1264 void __user *arg)
1265 {
1266 struct getbmapx bmx;
1267 int error;
1268
1269 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1270 return -XFS_ERROR(EFAULT);
1271
1272 if (bmx.bmv_count < 2)
1273 return -XFS_ERROR(EINVAL);
1274
1275 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1276 if (ioflags & IO_INVIS)
1277 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1278
1279 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1280 (struct getbmap *)arg+1);
1281 if (error)
1282 return -error;
1283
1284 /* copy back header - only size of getbmap */
1285 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1286 return -XFS_ERROR(EFAULT);
1287 return 0;
1288 }
1289
1290 STATIC int
1291 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1292 {
1293 struct getbmapx __user *base = *ap;
1294
1295 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1296 return XFS_ERROR(EFAULT);
1297
1298 *ap += sizeof(struct getbmapx);
1299 return 0;
1300 }
1301
1302 STATIC int
1303 xfs_ioc_getbmapx(
1304 struct xfs_inode *ip,
1305 void __user *arg)
1306 {
1307 struct getbmapx bmx;
1308 int error;
1309
1310 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1311 return -XFS_ERROR(EFAULT);
1312
1313 if (bmx.bmv_count < 2)
1314 return -XFS_ERROR(EINVAL);
1315
1316 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1317 return -XFS_ERROR(EINVAL);
1318
1319 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1320 (struct getbmapx *)arg+1);
1321 if (error)
1322 return -error;
1323
1324 /* copy back header */
1325 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1326 return -XFS_ERROR(EFAULT);
1327
1328 return 0;
1329 }
1330
1331 /*
1332 * Note: some of the ioctl's return positive numbers as a
1333 * byte count indicating success, such as readlink_by_handle.
1334 * So we don't "sign flip" like most other routines. This means
1335 * true errors need to be returned as a negative value.
1336 */
1337 long
1338 xfs_file_ioctl(
1339 struct file *filp,
1340 unsigned int cmd,
1341 unsigned long p)
1342 {
1343 struct inode *inode = file_inode(filp);
1344 struct xfs_inode *ip = XFS_I(inode);
1345 struct xfs_mount *mp = ip->i_mount;
1346 void __user *arg = (void __user *)p;
1347 int ioflags = 0;
1348 int error;
1349
1350 if (filp->f_mode & FMODE_NOCMTIME)
1351 ioflags |= IO_INVIS;
1352
1353 trace_xfs_file_ioctl(ip);
1354
1355 switch (cmd) {
1356 case FITRIM:
1357 return xfs_ioc_trim(mp, arg);
1358 case XFS_IOC_ALLOCSP:
1359 case XFS_IOC_FREESP:
1360 case XFS_IOC_RESVSP:
1361 case XFS_IOC_UNRESVSP:
1362 case XFS_IOC_ALLOCSP64:
1363 case XFS_IOC_FREESP64:
1364 case XFS_IOC_RESVSP64:
1365 case XFS_IOC_UNRESVSP64:
1366 case XFS_IOC_ZERO_RANGE: {
1367 xfs_flock64_t bf;
1368
1369 if (copy_from_user(&bf, arg, sizeof(bf)))
1370 return -XFS_ERROR(EFAULT);
1371 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1372 }
1373 case XFS_IOC_DIOINFO: {
1374 struct dioattr da;
1375 xfs_buftarg_t *target =
1376 XFS_IS_REALTIME_INODE(ip) ?
1377 mp->m_rtdev_targp : mp->m_ddev_targp;
1378
1379 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1380 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1381
1382 if (copy_to_user(arg, &da, sizeof(da)))
1383 return -XFS_ERROR(EFAULT);
1384 return 0;
1385 }
1386
1387 case XFS_IOC_FSBULKSTAT_SINGLE:
1388 case XFS_IOC_FSBULKSTAT:
1389 case XFS_IOC_FSINUMBERS:
1390 return xfs_ioc_bulkstat(mp, cmd, arg);
1391
1392 case XFS_IOC_FSGEOMETRY_V1:
1393 return xfs_ioc_fsgeometry_v1(mp, arg);
1394
1395 case XFS_IOC_FSGEOMETRY:
1396 return xfs_ioc_fsgeometry(mp, arg);
1397
1398 case XFS_IOC_GETVERSION:
1399 return put_user(inode->i_generation, (int __user *)arg);
1400
1401 case XFS_IOC_FSGETXATTR:
1402 return xfs_ioc_fsgetxattr(ip, 0, arg);
1403 case XFS_IOC_FSGETXATTRA:
1404 return xfs_ioc_fsgetxattr(ip, 1, arg);
1405 case XFS_IOC_FSSETXATTR:
1406 return xfs_ioc_fssetxattr(ip, filp, arg);
1407 case XFS_IOC_GETXFLAGS:
1408 return xfs_ioc_getxflags(ip, arg);
1409 case XFS_IOC_SETXFLAGS:
1410 return xfs_ioc_setxflags(ip, filp, arg);
1411
1412 case XFS_IOC_FSSETDM: {
1413 struct fsdmidata dmi;
1414
1415 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1416 return -XFS_ERROR(EFAULT);
1417
1418 error = mnt_want_write_file(filp);
1419 if (error)
1420 return error;
1421
1422 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1423 dmi.fsd_dmstate);
1424 mnt_drop_write_file(filp);
1425 return -error;
1426 }
1427
1428 case XFS_IOC_GETBMAP:
1429 case XFS_IOC_GETBMAPA:
1430 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1431
1432 case XFS_IOC_GETBMAPX:
1433 return xfs_ioc_getbmapx(ip, arg);
1434
1435 case XFS_IOC_FD_TO_HANDLE:
1436 case XFS_IOC_PATH_TO_HANDLE:
1437 case XFS_IOC_PATH_TO_FSHANDLE: {
1438 xfs_fsop_handlereq_t hreq;
1439
1440 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1441 return -XFS_ERROR(EFAULT);
1442 return xfs_find_handle(cmd, &hreq);
1443 }
1444 case XFS_IOC_OPEN_BY_HANDLE: {
1445 xfs_fsop_handlereq_t hreq;
1446
1447 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1448 return -XFS_ERROR(EFAULT);
1449 return xfs_open_by_handle(filp, &hreq);
1450 }
1451 case XFS_IOC_FSSETDM_BY_HANDLE:
1452 return xfs_fssetdm_by_handle(filp, arg);
1453
1454 case XFS_IOC_READLINK_BY_HANDLE: {
1455 xfs_fsop_handlereq_t hreq;
1456
1457 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1458 return -XFS_ERROR(EFAULT);
1459 return xfs_readlink_by_handle(filp, &hreq);
1460 }
1461 case XFS_IOC_ATTRLIST_BY_HANDLE:
1462 return xfs_attrlist_by_handle(filp, arg);
1463
1464 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1465 return xfs_attrmulti_by_handle(filp, arg);
1466
1467 case XFS_IOC_SWAPEXT: {
1468 struct xfs_swapext sxp;
1469
1470 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1471 return -XFS_ERROR(EFAULT);
1472 error = mnt_want_write_file(filp);
1473 if (error)
1474 return error;
1475 error = xfs_swapext(&sxp);
1476 mnt_drop_write_file(filp);
1477 return -error;
1478 }
1479
1480 case XFS_IOC_FSCOUNTS: {
1481 xfs_fsop_counts_t out;
1482
1483 error = xfs_fs_counts(mp, &out);
1484 if (error)
1485 return -error;
1486
1487 if (copy_to_user(arg, &out, sizeof(out)))
1488 return -XFS_ERROR(EFAULT);
1489 return 0;
1490 }
1491
1492 case XFS_IOC_SET_RESBLKS: {
1493 xfs_fsop_resblks_t inout;
1494 __uint64_t in;
1495
1496 if (!capable(CAP_SYS_ADMIN))
1497 return -EPERM;
1498
1499 if (mp->m_flags & XFS_MOUNT_RDONLY)
1500 return -XFS_ERROR(EROFS);
1501
1502 if (copy_from_user(&inout, arg, sizeof(inout)))
1503 return -XFS_ERROR(EFAULT);
1504
1505 error = mnt_want_write_file(filp);
1506 if (error)
1507 return error;
1508
1509 /* input parameter is passed in resblks field of structure */
1510 in = inout.resblks;
1511 error = xfs_reserve_blocks(mp, &in, &inout);
1512 mnt_drop_write_file(filp);
1513 if (error)
1514 return -error;
1515
1516 if (copy_to_user(arg, &inout, sizeof(inout)))
1517 return -XFS_ERROR(EFAULT);
1518 return 0;
1519 }
1520
1521 case XFS_IOC_GET_RESBLKS: {
1522 xfs_fsop_resblks_t out;
1523
1524 if (!capable(CAP_SYS_ADMIN))
1525 return -EPERM;
1526
1527 error = xfs_reserve_blocks(mp, NULL, &out);
1528 if (error)
1529 return -error;
1530
1531 if (copy_to_user(arg, &out, sizeof(out)))
1532 return -XFS_ERROR(EFAULT);
1533
1534 return 0;
1535 }
1536
1537 case XFS_IOC_FSGROWFSDATA: {
1538 xfs_growfs_data_t in;
1539
1540 if (copy_from_user(&in, arg, sizeof(in)))
1541 return -XFS_ERROR(EFAULT);
1542
1543 error = mnt_want_write_file(filp);
1544 if (error)
1545 return error;
1546 error = xfs_growfs_data(mp, &in);
1547 mnt_drop_write_file(filp);
1548 return -error;
1549 }
1550
1551 case XFS_IOC_FSGROWFSLOG: {
1552 xfs_growfs_log_t in;
1553
1554 if (copy_from_user(&in, arg, sizeof(in)))
1555 return -XFS_ERROR(EFAULT);
1556
1557 error = mnt_want_write_file(filp);
1558 if (error)
1559 return error;
1560 error = xfs_growfs_log(mp, &in);
1561 mnt_drop_write_file(filp);
1562 return -error;
1563 }
1564
1565 case XFS_IOC_FSGROWFSRT: {
1566 xfs_growfs_rt_t in;
1567
1568 if (copy_from_user(&in, arg, sizeof(in)))
1569 return -XFS_ERROR(EFAULT);
1570
1571 error = mnt_want_write_file(filp);
1572 if (error)
1573 return error;
1574 error = xfs_growfs_rt(mp, &in);
1575 mnt_drop_write_file(filp);
1576 return -error;
1577 }
1578
1579 case XFS_IOC_GOINGDOWN: {
1580 __uint32_t in;
1581
1582 if (!capable(CAP_SYS_ADMIN))
1583 return -EPERM;
1584
1585 if (get_user(in, (__uint32_t __user *)arg))
1586 return -XFS_ERROR(EFAULT);
1587
1588 error = xfs_fs_goingdown(mp, in);
1589 return -error;
1590 }
1591
1592 case XFS_IOC_ERROR_INJECTION: {
1593 xfs_error_injection_t in;
1594
1595 if (!capable(CAP_SYS_ADMIN))
1596 return -EPERM;
1597
1598 if (copy_from_user(&in, arg, sizeof(in)))
1599 return -XFS_ERROR(EFAULT);
1600
1601 error = xfs_errortag_add(in.errtag, mp);
1602 return -error;
1603 }
1604
1605 case XFS_IOC_ERROR_CLEARALL:
1606 if (!capable(CAP_SYS_ADMIN))
1607 return -EPERM;
1608
1609 error = xfs_errortag_clearall(mp, 1);
1610 return -error;
1611
1612 case XFS_IOC_FREE_EOFBLOCKS: {
1613 struct xfs_eofblocks eofb;
1614
1615 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1616 return -XFS_ERROR(EFAULT);
1617
1618 if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
1619 return -XFS_ERROR(EINVAL);
1620
1621 if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
1622 return -XFS_ERROR(EINVAL);
1623
1624 if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) ||
1625 memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
1626 return -XFS_ERROR(EINVAL);
1627
1628 error = xfs_icache_free_eofblocks(mp, &eofb);
1629 return -error;
1630 }
1631
1632 default:
1633 return -ENOTTY;
1634 }
1635 }
Linus' kernel tree