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xfs: include header files for prototypes
[deliverable/linux.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_dir2.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_ioctl.h"
38 #include "xfs_btree.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_rtalloc.h"
41 #include "xfs_itable.h"
42 #include "xfs_error.h"
43 #include "xfs_rw.h"
44 #include "xfs_acl.h"
45 #include "xfs_attr.h"
46 #include "xfs_bmap.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_utils.h"
49 #include "xfs_dfrag.h"
50 #include "xfs_fsops.h"
51 #include "xfs_vnodeops.h"
52 #include "xfs_quota.h"
53 #include "xfs_inode_item.h"
54 #include "xfs_export.h"
55
56 #include <linux/capability.h>
57 #include <linux/dcache.h>
58 #include <linux/mount.h>
59 #include <linux/namei.h>
60 #include <linux/pagemap.h>
61 #include <linux/exportfs.h>
62
63 /*
64 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
65 * a file or fs handle.
66 *
67 * XFS_IOC_PATH_TO_FSHANDLE
68 * returns fs handle for a mount point or path within that mount point
69 * XFS_IOC_FD_TO_HANDLE
70 * returns full handle for a FD opened in user space
71 * XFS_IOC_PATH_TO_HANDLE
72 * returns full handle for a path
73 */
74 int
75 xfs_find_handle(
76 unsigned int cmd,
77 xfs_fsop_handlereq_t *hreq)
78 {
79 int hsize;
80 xfs_handle_t handle;
81 struct inode *inode;
82 struct file *file = NULL;
83 struct path path;
84 int error;
85 struct xfs_inode *ip;
86
87 if (cmd == XFS_IOC_FD_TO_HANDLE) {
88 file = fget(hreq->fd);
89 if (!file)
90 return -EBADF;
91 inode = file->f_path.dentry->d_inode;
92 } else {
93 error = user_lpath((const char __user *)hreq->path, &path);
94 if (error)
95 return error;
96 inode = path.dentry->d_inode;
97 }
98 ip = XFS_I(inode);
99
100 /*
101 * We can only generate handles for inodes residing on a XFS filesystem,
102 * and only for regular files, directories or symbolic links.
103 */
104 error = -EINVAL;
105 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
106 goto out_put;
107
108 error = -EBADF;
109 if (!S_ISREG(inode->i_mode) &&
110 !S_ISDIR(inode->i_mode) &&
111 !S_ISLNK(inode->i_mode))
112 goto out_put;
113
114
115 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
116
117 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
118 /*
119 * This handle only contains an fsid, zero the rest.
120 */
121 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
122 hsize = sizeof(xfs_fsid_t);
123 } else {
124 int lock_mode;
125
126 lock_mode = xfs_ilock_map_shared(ip);
127 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
128 sizeof(handle.ha_fid.fid_len);
129 handle.ha_fid.fid_pad = 0;
130 handle.ha_fid.fid_gen = ip->i_d.di_gen;
131 handle.ha_fid.fid_ino = ip->i_ino;
132 xfs_iunlock_map_shared(ip, lock_mode);
133
134 hsize = XFS_HSIZE(handle);
135 }
136
137 error = -EFAULT;
138 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
139 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
140 goto out_put;
141
142 error = 0;
143
144 out_put:
145 if (cmd == XFS_IOC_FD_TO_HANDLE)
146 fput(file);
147 else
148 path_put(&path);
149 return error;
150 }
151
152 /*
153 * No need to do permission checks on the various pathname components
154 * as the handle operations are privileged.
155 */
156 STATIC int
157 xfs_handle_acceptable(
158 void *context,
159 struct dentry *dentry)
160 {
161 return 1;
162 }
163
164 /*
165 * Convert userspace handle data into a dentry.
166 */
167 struct dentry *
168 xfs_handle_to_dentry(
169 struct file *parfilp,
170 void __user *uhandle,
171 u32 hlen)
172 {
173 xfs_handle_t handle;
174 struct xfs_fid64 fid;
175
176 /*
177 * Only allow handle opens under a directory.
178 */
179 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
180 return ERR_PTR(-ENOTDIR);
181
182 if (hlen != sizeof(xfs_handle_t))
183 return ERR_PTR(-EINVAL);
184 if (copy_from_user(&handle, uhandle, hlen))
185 return ERR_PTR(-EFAULT);
186 if (handle.ha_fid.fid_len !=
187 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
188 return ERR_PTR(-EINVAL);
189
190 memset(&fid, 0, sizeof(struct fid));
191 fid.ino = handle.ha_fid.fid_ino;
192 fid.gen = handle.ha_fid.fid_gen;
193
194 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
195 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
196 xfs_handle_acceptable, NULL);
197 }
198
199 STATIC struct dentry *
200 xfs_handlereq_to_dentry(
201 struct file *parfilp,
202 xfs_fsop_handlereq_t *hreq)
203 {
204 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
205 }
206
207 int
208 xfs_open_by_handle(
209 struct file *parfilp,
210 xfs_fsop_handlereq_t *hreq)
211 {
212 const struct cred *cred = current_cred();
213 int error;
214 int fd;
215 int permflag;
216 struct file *filp;
217 struct inode *inode;
218 struct dentry *dentry;
219
220 if (!capable(CAP_SYS_ADMIN))
221 return -XFS_ERROR(EPERM);
222
223 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
224 if (IS_ERR(dentry))
225 return PTR_ERR(dentry);
226 inode = dentry->d_inode;
227
228 /* Restrict xfs_open_by_handle to directories & regular files. */
229 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
230 error = -XFS_ERROR(EPERM);
231 goto out_dput;
232 }
233
234 #if BITS_PER_LONG != 32
235 hreq->oflags |= O_LARGEFILE;
236 #endif
237
238 /* Put open permission in namei format. */
239 permflag = hreq->oflags;
240 if ((permflag+1) & O_ACCMODE)
241 permflag++;
242 if (permflag & O_TRUNC)
243 permflag |= 2;
244
245 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
246 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
247 error = -XFS_ERROR(EPERM);
248 goto out_dput;
249 }
250
251 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
252 error = -XFS_ERROR(EACCES);
253 goto out_dput;
254 }
255
256 /* Can't write directories. */
257 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
258 error = -XFS_ERROR(EISDIR);
259 goto out_dput;
260 }
261
262 fd = get_unused_fd();
263 if (fd < 0) {
264 error = fd;
265 goto out_dput;
266 }
267
268 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
269 hreq->oflags, cred);
270 if (IS_ERR(filp)) {
271 put_unused_fd(fd);
272 return PTR_ERR(filp);
273 }
274
275 if (inode->i_mode & S_IFREG) {
276 filp->f_flags |= O_NOATIME;
277 filp->f_mode |= FMODE_NOCMTIME;
278 }
279
280 fd_install(fd, filp);
281 return fd;
282
283 out_dput:
284 dput(dentry);
285 return error;
286 }
287
288 /*
289 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
290 * unused first argument.
291 */
292 STATIC int
293 do_readlink(
294 char __user *buffer,
295 int buflen,
296 const char *link)
297 {
298 int len;
299
300 len = PTR_ERR(link);
301 if (IS_ERR(link))
302 goto out;
303
304 len = strlen(link);
305 if (len > (unsigned) buflen)
306 len = buflen;
307 if (copy_to_user(buffer, link, len))
308 len = -EFAULT;
309 out:
310 return len;
311 }
312
313
314 int
315 xfs_readlink_by_handle(
316 struct file *parfilp,
317 xfs_fsop_handlereq_t *hreq)
318 {
319 struct dentry *dentry;
320 __u32 olen;
321 void *link;
322 int error;
323
324 if (!capable(CAP_SYS_ADMIN))
325 return -XFS_ERROR(EPERM);
326
327 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
328 if (IS_ERR(dentry))
329 return PTR_ERR(dentry);
330
331 /* Restrict this handle operation to symlinks only. */
332 if (!S_ISLNK(dentry->d_inode->i_mode)) {
333 error = -XFS_ERROR(EINVAL);
334 goto out_dput;
335 }
336
337 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
338 error = -XFS_ERROR(EFAULT);
339 goto out_dput;
340 }
341
342 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
343 if (!link) {
344 error = -XFS_ERROR(ENOMEM);
345 goto out_dput;
346 }
347
348 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
349 if (error)
350 goto out_kfree;
351 error = do_readlink(hreq->ohandle, olen, link);
352 if (error)
353 goto out_kfree;
354
355 out_kfree:
356 kfree(link);
357 out_dput:
358 dput(dentry);
359 return error;
360 }
361
362 STATIC int
363 xfs_fssetdm_by_handle(
364 struct file *parfilp,
365 void __user *arg)
366 {
367 int error;
368 struct fsdmidata fsd;
369 xfs_fsop_setdm_handlereq_t dmhreq;
370 struct dentry *dentry;
371
372 if (!capable(CAP_MKNOD))
373 return -XFS_ERROR(EPERM);
374 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
375 return -XFS_ERROR(EFAULT);
376
377 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
378 if (IS_ERR(dentry))
379 return PTR_ERR(dentry);
380
381 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
382 error = -XFS_ERROR(EPERM);
383 goto out;
384 }
385
386 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
387 error = -XFS_ERROR(EFAULT);
388 goto out;
389 }
390
391 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
392 fsd.fsd_dmstate);
393
394 out:
395 dput(dentry);
396 return error;
397 }
398
399 STATIC int
400 xfs_attrlist_by_handle(
401 struct file *parfilp,
402 void __user *arg)
403 {
404 int error = -ENOMEM;
405 attrlist_cursor_kern_t *cursor;
406 xfs_fsop_attrlist_handlereq_t al_hreq;
407 struct dentry *dentry;
408 char *kbuf;
409
410 if (!capable(CAP_SYS_ADMIN))
411 return -XFS_ERROR(EPERM);
412 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
413 return -XFS_ERROR(EFAULT);
414 if (al_hreq.buflen > XATTR_LIST_MAX)
415 return -XFS_ERROR(EINVAL);
416
417 /*
418 * Reject flags, only allow namespaces.
419 */
420 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
421 return -XFS_ERROR(EINVAL);
422
423 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
424 if (IS_ERR(dentry))
425 return PTR_ERR(dentry);
426
427 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
428 if (!kbuf)
429 goto out_dput;
430
431 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
432 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
433 al_hreq.flags, cursor);
434 if (error)
435 goto out_kfree;
436
437 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
438 error = -EFAULT;
439
440 out_kfree:
441 kfree(kbuf);
442 out_dput:
443 dput(dentry);
444 return error;
445 }
446
447 int
448 xfs_attrmulti_attr_get(
449 struct inode *inode,
450 char *name,
451 char __user *ubuf,
452 __uint32_t *len,
453 __uint32_t flags)
454 {
455 char *kbuf;
456 int error = EFAULT;
457
458 if (*len > XATTR_SIZE_MAX)
459 return EINVAL;
460 kbuf = kmalloc(*len, GFP_KERNEL);
461 if (!kbuf)
462 return ENOMEM;
463
464 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
465 if (error)
466 goto out_kfree;
467
468 if (copy_to_user(ubuf, kbuf, *len))
469 error = EFAULT;
470
471 out_kfree:
472 kfree(kbuf);
473 return error;
474 }
475
476 int
477 xfs_attrmulti_attr_set(
478 struct inode *inode,
479 char *name,
480 const char __user *ubuf,
481 __uint32_t len,
482 __uint32_t flags)
483 {
484 char *kbuf;
485 int error = EFAULT;
486
487 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
488 return EPERM;
489 if (len > XATTR_SIZE_MAX)
490 return EINVAL;
491
492 kbuf = kmalloc(len, GFP_KERNEL);
493 if (!kbuf)
494 return ENOMEM;
495
496 if (copy_from_user(kbuf, ubuf, len))
497 goto out_kfree;
498
499 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
500
501 out_kfree:
502 kfree(kbuf);
503 return error;
504 }
505
506 int
507 xfs_attrmulti_attr_remove(
508 struct inode *inode,
509 char *name,
510 __uint32_t flags)
511 {
512 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
513 return EPERM;
514 return xfs_attr_remove(XFS_I(inode), name, flags);
515 }
516
517 STATIC int
518 xfs_attrmulti_by_handle(
519 struct file *parfilp,
520 void __user *arg)
521 {
522 int error;
523 xfs_attr_multiop_t *ops;
524 xfs_fsop_attrmulti_handlereq_t am_hreq;
525 struct dentry *dentry;
526 unsigned int i, size;
527 char *attr_name;
528
529 if (!capable(CAP_SYS_ADMIN))
530 return -XFS_ERROR(EPERM);
531 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
532 return -XFS_ERROR(EFAULT);
533
534 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
535 if (IS_ERR(dentry))
536 return PTR_ERR(dentry);
537
538 error = E2BIG;
539 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
540 if (!size || size > 16 * PAGE_SIZE)
541 goto out_dput;
542
543 error = ENOMEM;
544 ops = kmalloc(size, GFP_KERNEL);
545 if (!ops)
546 goto out_dput;
547
548 error = EFAULT;
549 if (copy_from_user(ops, am_hreq.ops, size))
550 goto out_kfree_ops;
551
552 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
553 if (!attr_name)
554 goto out_kfree_ops;
555
556
557 error = 0;
558 for (i = 0; i < am_hreq.opcount; i++) {
559 ops[i].am_error = strncpy_from_user(attr_name,
560 ops[i].am_attrname, MAXNAMELEN);
561 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
562 error = -ERANGE;
563 if (ops[i].am_error < 0)
564 break;
565
566 switch (ops[i].am_opcode) {
567 case ATTR_OP_GET:
568 ops[i].am_error = xfs_attrmulti_attr_get(
569 dentry->d_inode, attr_name,
570 ops[i].am_attrvalue, &ops[i].am_length,
571 ops[i].am_flags);
572 break;
573 case ATTR_OP_SET:
574 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
575 if (ops[i].am_error)
576 break;
577 ops[i].am_error = xfs_attrmulti_attr_set(
578 dentry->d_inode, attr_name,
579 ops[i].am_attrvalue, ops[i].am_length,
580 ops[i].am_flags);
581 mnt_drop_write(parfilp->f_path.mnt);
582 break;
583 case ATTR_OP_REMOVE:
584 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
585 if (ops[i].am_error)
586 break;
587 ops[i].am_error = xfs_attrmulti_attr_remove(
588 dentry->d_inode, attr_name,
589 ops[i].am_flags);
590 mnt_drop_write(parfilp->f_path.mnt);
591 break;
592 default:
593 ops[i].am_error = EINVAL;
594 }
595 }
596
597 if (copy_to_user(am_hreq.ops, ops, size))
598 error = XFS_ERROR(EFAULT);
599
600 kfree(attr_name);
601 out_kfree_ops:
602 kfree(ops);
603 out_dput:
604 dput(dentry);
605 return -error;
606 }
607
608 int
609 xfs_ioc_space(
610 struct xfs_inode *ip,
611 struct inode *inode,
612 struct file *filp,
613 int ioflags,
614 unsigned int cmd,
615 xfs_flock64_t *bf)
616 {
617 int attr_flags = 0;
618 int error;
619
620 /*
621 * Only allow the sys admin to reserve space unless
622 * unwritten extents are enabled.
623 */
624 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
625 !capable(CAP_SYS_ADMIN))
626 return -XFS_ERROR(EPERM);
627
628 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
629 return -XFS_ERROR(EPERM);
630
631 if (!(filp->f_mode & FMODE_WRITE))
632 return -XFS_ERROR(EBADF);
633
634 if (!S_ISREG(inode->i_mode))
635 return -XFS_ERROR(EINVAL);
636
637 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
638 attr_flags |= XFS_ATTR_NONBLOCK;
639 if (ioflags & IO_INVIS)
640 attr_flags |= XFS_ATTR_DMI;
641
642 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
643 return -error;
644 }
645
646 STATIC int
647 xfs_ioc_bulkstat(
648 xfs_mount_t *mp,
649 unsigned int cmd,
650 void __user *arg)
651 {
652 xfs_fsop_bulkreq_t bulkreq;
653 int count; /* # of records returned */
654 xfs_ino_t inlast; /* last inode number */
655 int done;
656 int error;
657
658 /* done = 1 if there are more stats to get and if bulkstat */
659 /* should be called again (unused here, but used in dmapi) */
660
661 if (!capable(CAP_SYS_ADMIN))
662 return -EPERM;
663
664 if (XFS_FORCED_SHUTDOWN(mp))
665 return -XFS_ERROR(EIO);
666
667 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
668 return -XFS_ERROR(EFAULT);
669
670 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
671 return -XFS_ERROR(EFAULT);
672
673 if ((count = bulkreq.icount) <= 0)
674 return -XFS_ERROR(EINVAL);
675
676 if (bulkreq.ubuffer == NULL)
677 return -XFS_ERROR(EINVAL);
678
679 if (cmd == XFS_IOC_FSINUMBERS)
680 error = xfs_inumbers(mp, &inlast, &count,
681 bulkreq.ubuffer, xfs_inumbers_fmt);
682 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
683 error = xfs_bulkstat_single(mp, &inlast,
684 bulkreq.ubuffer, &done);
685 else /* XFS_IOC_FSBULKSTAT */
686 error = xfs_bulkstat(mp, &inlast, &count,
687 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
688 sizeof(xfs_bstat_t), bulkreq.ubuffer,
689 BULKSTAT_FG_QUICK, &done);
690
691 if (error)
692 return -error;
693
694 if (bulkreq.ocount != NULL) {
695 if (copy_to_user(bulkreq.lastip, &inlast,
696 sizeof(xfs_ino_t)))
697 return -XFS_ERROR(EFAULT);
698
699 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
700 return -XFS_ERROR(EFAULT);
701 }
702
703 return 0;
704 }
705
706 STATIC int
707 xfs_ioc_fsgeometry_v1(
708 xfs_mount_t *mp,
709 void __user *arg)
710 {
711 xfs_fsop_geom_v1_t fsgeo;
712 int error;
713
714 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
715 if (error)
716 return -error;
717
718 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
719 return -XFS_ERROR(EFAULT);
720 return 0;
721 }
722
723 STATIC int
724 xfs_ioc_fsgeometry(
725 xfs_mount_t *mp,
726 void __user *arg)
727 {
728 xfs_fsop_geom_t fsgeo;
729 int error;
730
731 error = xfs_fs_geometry(mp, &fsgeo, 4);
732 if (error)
733 return -error;
734
735 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
736 return -XFS_ERROR(EFAULT);
737 return 0;
738 }
739
740 /*
741 * Linux extended inode flags interface.
742 */
743
744 STATIC unsigned int
745 xfs_merge_ioc_xflags(
746 unsigned int flags,
747 unsigned int start)
748 {
749 unsigned int xflags = start;
750
751 if (flags & FS_IMMUTABLE_FL)
752 xflags |= XFS_XFLAG_IMMUTABLE;
753 else
754 xflags &= ~XFS_XFLAG_IMMUTABLE;
755 if (flags & FS_APPEND_FL)
756 xflags |= XFS_XFLAG_APPEND;
757 else
758 xflags &= ~XFS_XFLAG_APPEND;
759 if (flags & FS_SYNC_FL)
760 xflags |= XFS_XFLAG_SYNC;
761 else
762 xflags &= ~XFS_XFLAG_SYNC;
763 if (flags & FS_NOATIME_FL)
764 xflags |= XFS_XFLAG_NOATIME;
765 else
766 xflags &= ~XFS_XFLAG_NOATIME;
767 if (flags & FS_NODUMP_FL)
768 xflags |= XFS_XFLAG_NODUMP;
769 else
770 xflags &= ~XFS_XFLAG_NODUMP;
771
772 return xflags;
773 }
774
775 STATIC unsigned int
776 xfs_di2lxflags(
777 __uint16_t di_flags)
778 {
779 unsigned int flags = 0;
780
781 if (di_flags & XFS_DIFLAG_IMMUTABLE)
782 flags |= FS_IMMUTABLE_FL;
783 if (di_flags & XFS_DIFLAG_APPEND)
784 flags |= FS_APPEND_FL;
785 if (di_flags & XFS_DIFLAG_SYNC)
786 flags |= FS_SYNC_FL;
787 if (di_flags & XFS_DIFLAG_NOATIME)
788 flags |= FS_NOATIME_FL;
789 if (di_flags & XFS_DIFLAG_NODUMP)
790 flags |= FS_NODUMP_FL;
791 return flags;
792 }
793
794 STATIC int
795 xfs_ioc_fsgetxattr(
796 xfs_inode_t *ip,
797 int attr,
798 void __user *arg)
799 {
800 struct fsxattr fa;
801
802 xfs_ilock(ip, XFS_ILOCK_SHARED);
803 fa.fsx_xflags = xfs_ip2xflags(ip);
804 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
805 fa.fsx_projid = ip->i_d.di_projid;
806
807 if (attr) {
808 if (ip->i_afp) {
809 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
810 fa.fsx_nextents = ip->i_afp->if_bytes /
811 sizeof(xfs_bmbt_rec_t);
812 else
813 fa.fsx_nextents = ip->i_d.di_anextents;
814 } else
815 fa.fsx_nextents = 0;
816 } else {
817 if (ip->i_df.if_flags & XFS_IFEXTENTS)
818 fa.fsx_nextents = ip->i_df.if_bytes /
819 sizeof(xfs_bmbt_rec_t);
820 else
821 fa.fsx_nextents = ip->i_d.di_nextents;
822 }
823 xfs_iunlock(ip, XFS_ILOCK_SHARED);
824
825 if (copy_to_user(arg, &fa, sizeof(fa)))
826 return -EFAULT;
827 return 0;
828 }
829
830 STATIC void
831 xfs_set_diflags(
832 struct xfs_inode *ip,
833 unsigned int xflags)
834 {
835 unsigned int di_flags;
836
837 /* can't set PREALLOC this way, just preserve it */
838 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
839 if (xflags & XFS_XFLAG_IMMUTABLE)
840 di_flags |= XFS_DIFLAG_IMMUTABLE;
841 if (xflags & XFS_XFLAG_APPEND)
842 di_flags |= XFS_DIFLAG_APPEND;
843 if (xflags & XFS_XFLAG_SYNC)
844 di_flags |= XFS_DIFLAG_SYNC;
845 if (xflags & XFS_XFLAG_NOATIME)
846 di_flags |= XFS_DIFLAG_NOATIME;
847 if (xflags & XFS_XFLAG_NODUMP)
848 di_flags |= XFS_DIFLAG_NODUMP;
849 if (xflags & XFS_XFLAG_PROJINHERIT)
850 di_flags |= XFS_DIFLAG_PROJINHERIT;
851 if (xflags & XFS_XFLAG_NODEFRAG)
852 di_flags |= XFS_DIFLAG_NODEFRAG;
853 if (xflags & XFS_XFLAG_FILESTREAM)
854 di_flags |= XFS_DIFLAG_FILESTREAM;
855 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
856 if (xflags & XFS_XFLAG_RTINHERIT)
857 di_flags |= XFS_DIFLAG_RTINHERIT;
858 if (xflags & XFS_XFLAG_NOSYMLINKS)
859 di_flags |= XFS_DIFLAG_NOSYMLINKS;
860 if (xflags & XFS_XFLAG_EXTSZINHERIT)
861 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
862 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
863 if (xflags & XFS_XFLAG_REALTIME)
864 di_flags |= XFS_DIFLAG_REALTIME;
865 if (xflags & XFS_XFLAG_EXTSIZE)
866 di_flags |= XFS_DIFLAG_EXTSIZE;
867 }
868
869 ip->i_d.di_flags = di_flags;
870 }
871
872 STATIC void
873 xfs_diflags_to_linux(
874 struct xfs_inode *ip)
875 {
876 struct inode *inode = VFS_I(ip);
877 unsigned int xflags = xfs_ip2xflags(ip);
878
879 if (xflags & XFS_XFLAG_IMMUTABLE)
880 inode->i_flags |= S_IMMUTABLE;
881 else
882 inode->i_flags &= ~S_IMMUTABLE;
883 if (xflags & XFS_XFLAG_APPEND)
884 inode->i_flags |= S_APPEND;
885 else
886 inode->i_flags &= ~S_APPEND;
887 if (xflags & XFS_XFLAG_SYNC)
888 inode->i_flags |= S_SYNC;
889 else
890 inode->i_flags &= ~S_SYNC;
891 if (xflags & XFS_XFLAG_NOATIME)
892 inode->i_flags |= S_NOATIME;
893 else
894 inode->i_flags &= ~S_NOATIME;
895 }
896
897 #define FSX_PROJID 1
898 #define FSX_EXTSIZE 2
899 #define FSX_XFLAGS 4
900 #define FSX_NONBLOCK 8
901
902 STATIC int
903 xfs_ioctl_setattr(
904 xfs_inode_t *ip,
905 struct fsxattr *fa,
906 int mask)
907 {
908 struct xfs_mount *mp = ip->i_mount;
909 struct xfs_trans *tp;
910 unsigned int lock_flags = 0;
911 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
912 struct xfs_dquot *olddquot = NULL;
913 int code;
914
915 xfs_itrace_entry(ip);
916
917 if (mp->m_flags & XFS_MOUNT_RDONLY)
918 return XFS_ERROR(EROFS);
919 if (XFS_FORCED_SHUTDOWN(mp))
920 return XFS_ERROR(EIO);
921
922 /*
923 * If disk quotas is on, we make sure that the dquots do exist on disk,
924 * before we start any other transactions. Trying to do this later
925 * is messy. We don't care to take a readlock to look at the ids
926 * in inode here, because we can't hold it across the trans_reserve.
927 * If the IDs do change before we take the ilock, we're covered
928 * because the i_*dquot fields will get updated anyway.
929 */
930 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
931 code = XFS_QM_DQVOPALLOC(mp, ip, ip->i_d.di_uid,
932 ip->i_d.di_gid, fa->fsx_projid,
933 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
934 if (code)
935 return code;
936 }
937
938 /*
939 * For the other attributes, we acquire the inode lock and
940 * first do an error checking pass.
941 */
942 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
943 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
944 if (code)
945 goto error_return;
946
947 lock_flags = XFS_ILOCK_EXCL;
948 xfs_ilock(ip, lock_flags);
949
950 /*
951 * CAP_FOWNER overrides the following restrictions:
952 *
953 * The user ID of the calling process must be equal
954 * to the file owner ID, except in cases where the
955 * CAP_FSETID capability is applicable.
956 */
957 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
958 code = XFS_ERROR(EPERM);
959 goto error_return;
960 }
961
962 /*
963 * Do a quota reservation only if projid is actually going to change.
964 */
965 if (mask & FSX_PROJID) {
966 if (XFS_IS_PQUOTA_ON(mp) &&
967 ip->i_d.di_projid != fa->fsx_projid) {
968 ASSERT(tp);
969 code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
970 capable(CAP_FOWNER) ?
971 XFS_QMOPT_FORCE_RES : 0);
972 if (code) /* out of quota */
973 goto error_return;
974 }
975 }
976
977 if (mask & FSX_EXTSIZE) {
978 /*
979 * Can't change extent size if any extents are allocated.
980 */
981 if (ip->i_d.di_nextents &&
982 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
983 fa->fsx_extsize)) {
984 code = XFS_ERROR(EINVAL); /* EFBIG? */
985 goto error_return;
986 }
987
988 /*
989 * Extent size must be a multiple of the appropriate block
990 * size, if set at all.
991 */
992 if (fa->fsx_extsize != 0) {
993 xfs_extlen_t size;
994
995 if (XFS_IS_REALTIME_INODE(ip) ||
996 ((mask & FSX_XFLAGS) &&
997 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
998 size = mp->m_sb.sb_rextsize <<
999 mp->m_sb.sb_blocklog;
1000 } else {
1001 size = mp->m_sb.sb_blocksize;
1002 }
1003
1004 if (fa->fsx_extsize % size) {
1005 code = XFS_ERROR(EINVAL);
1006 goto error_return;
1007 }
1008 }
1009 }
1010
1011
1012 if (mask & FSX_XFLAGS) {
1013 /*
1014 * Can't change realtime flag if any extents are allocated.
1015 */
1016 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1017 (XFS_IS_REALTIME_INODE(ip)) !=
1018 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1019 code = XFS_ERROR(EINVAL); /* EFBIG? */
1020 goto error_return;
1021 }
1022
1023 /*
1024 * If realtime flag is set then must have realtime data.
1025 */
1026 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1027 if ((mp->m_sb.sb_rblocks == 0) ||
1028 (mp->m_sb.sb_rextsize == 0) ||
1029 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1030 code = XFS_ERROR(EINVAL);
1031 goto error_return;
1032 }
1033 }
1034
1035 /*
1036 * Can't modify an immutable/append-only file unless
1037 * we have appropriate permission.
1038 */
1039 if ((ip->i_d.di_flags &
1040 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1041 (fa->fsx_xflags &
1042 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1043 !capable(CAP_LINUX_IMMUTABLE)) {
1044 code = XFS_ERROR(EPERM);
1045 goto error_return;
1046 }
1047 }
1048
1049 xfs_trans_ijoin(tp, ip, lock_flags);
1050 xfs_trans_ihold(tp, ip);
1051
1052 /*
1053 * Change file ownership. Must be the owner or privileged.
1054 */
1055 if (mask & FSX_PROJID) {
1056 /*
1057 * CAP_FSETID overrides the following restrictions:
1058 *
1059 * The set-user-ID and set-group-ID bits of a file will be
1060 * cleared upon successful return from chown()
1061 */
1062 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1063 !capable(CAP_FSETID))
1064 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1065
1066 /*
1067 * Change the ownerships and register quota modifications
1068 * in the transaction.
1069 */
1070 if (ip->i_d.di_projid != fa->fsx_projid) {
1071 if (XFS_IS_PQUOTA_ON(mp)) {
1072 olddquot = XFS_QM_DQVOPCHOWN(mp, tp, ip,
1073 &ip->i_gdquot, gdqp);
1074 }
1075 ip->i_d.di_projid = fa->fsx_projid;
1076
1077 /*
1078 * We may have to rev the inode as well as
1079 * the superblock version number since projids didn't
1080 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1081 */
1082 if (ip->i_d.di_version == 1)
1083 xfs_bump_ino_vers2(tp, ip);
1084 }
1085
1086 }
1087
1088 if (mask & FSX_EXTSIZE)
1089 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1090 if (mask & FSX_XFLAGS) {
1091 xfs_set_diflags(ip, fa->fsx_xflags);
1092 xfs_diflags_to_linux(ip);
1093 }
1094
1095 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1096 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1097
1098 XFS_STATS_INC(xs_ig_attrchg);
1099
1100 /*
1101 * If this is a synchronous mount, make sure that the
1102 * transaction goes to disk before returning to the user.
1103 * This is slightly sub-optimal in that truncates require
1104 * two sync transactions instead of one for wsync filesystems.
1105 * One for the truncate and one for the timestamps since we
1106 * don't want to change the timestamps unless we're sure the
1107 * truncate worked. Truncates are less than 1% of the laddis
1108 * mix so this probably isn't worth the trouble to optimize.
1109 */
1110 if (mp->m_flags & XFS_MOUNT_WSYNC)
1111 xfs_trans_set_sync(tp);
1112 code = xfs_trans_commit(tp, 0);
1113 xfs_iunlock(ip, lock_flags);
1114
1115 /*
1116 * Release any dquot(s) the inode had kept before chown.
1117 */
1118 XFS_QM_DQRELE(mp, olddquot);
1119 XFS_QM_DQRELE(mp, udqp);
1120 XFS_QM_DQRELE(mp, gdqp);
1121
1122 if (code)
1123 return code;
1124
1125 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1126 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1127 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1128 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1129 }
1130
1131 return 0;
1132
1133 error_return:
1134 XFS_QM_DQRELE(mp, udqp);
1135 XFS_QM_DQRELE(mp, gdqp);
1136 xfs_trans_cancel(tp, 0);
1137 if (lock_flags)
1138 xfs_iunlock(ip, lock_flags);
1139 return code;
1140 }
1141
1142 STATIC int
1143 xfs_ioc_fssetxattr(
1144 xfs_inode_t *ip,
1145 struct file *filp,
1146 void __user *arg)
1147 {
1148 struct fsxattr fa;
1149 unsigned int mask;
1150
1151 if (copy_from_user(&fa, arg, sizeof(fa)))
1152 return -EFAULT;
1153
1154 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1155 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1156 mask |= FSX_NONBLOCK;
1157
1158 return -xfs_ioctl_setattr(ip, &fa, mask);
1159 }
1160
1161 STATIC int
1162 xfs_ioc_getxflags(
1163 xfs_inode_t *ip,
1164 void __user *arg)
1165 {
1166 unsigned int flags;
1167
1168 flags = xfs_di2lxflags(ip->i_d.di_flags);
1169 if (copy_to_user(arg, &flags, sizeof(flags)))
1170 return -EFAULT;
1171 return 0;
1172 }
1173
1174 STATIC int
1175 xfs_ioc_setxflags(
1176 xfs_inode_t *ip,
1177 struct file *filp,
1178 void __user *arg)
1179 {
1180 struct fsxattr fa;
1181 unsigned int flags;
1182 unsigned int mask;
1183
1184 if (copy_from_user(&flags, arg, sizeof(flags)))
1185 return -EFAULT;
1186
1187 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1188 FS_NOATIME_FL | FS_NODUMP_FL | \
1189 FS_SYNC_FL))
1190 return -EOPNOTSUPP;
1191
1192 mask = FSX_XFLAGS;
1193 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1194 mask |= FSX_NONBLOCK;
1195 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1196
1197 return -xfs_ioctl_setattr(ip, &fa, mask);
1198 }
1199
1200 STATIC int
1201 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1202 {
1203 struct getbmap __user *base = *ap;
1204
1205 /* copy only getbmap portion (not getbmapx) */
1206 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1207 return XFS_ERROR(EFAULT);
1208
1209 *ap += sizeof(struct getbmap);
1210 return 0;
1211 }
1212
1213 STATIC int
1214 xfs_ioc_getbmap(
1215 struct xfs_inode *ip,
1216 int ioflags,
1217 unsigned int cmd,
1218 void __user *arg)
1219 {
1220 struct getbmapx bmx;
1221 int error;
1222
1223 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1224 return -XFS_ERROR(EFAULT);
1225
1226 if (bmx.bmv_count < 2)
1227 return -XFS_ERROR(EINVAL);
1228
1229 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1230 if (ioflags & IO_INVIS)
1231 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1232
1233 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1234 (struct getbmap *)arg+1);
1235 if (error)
1236 return -error;
1237
1238 /* copy back header - only size of getbmap */
1239 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1240 return -XFS_ERROR(EFAULT);
1241 return 0;
1242 }
1243
1244 STATIC int
1245 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1246 {
1247 struct getbmapx __user *base = *ap;
1248
1249 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1250 return XFS_ERROR(EFAULT);
1251
1252 *ap += sizeof(struct getbmapx);
1253 return 0;
1254 }
1255
1256 STATIC int
1257 xfs_ioc_getbmapx(
1258 struct xfs_inode *ip,
1259 void __user *arg)
1260 {
1261 struct getbmapx bmx;
1262 int error;
1263
1264 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1265 return -XFS_ERROR(EFAULT);
1266
1267 if (bmx.bmv_count < 2)
1268 return -XFS_ERROR(EINVAL);
1269
1270 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1271 return -XFS_ERROR(EINVAL);
1272
1273 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1274 (struct getbmapx *)arg+1);
1275 if (error)
1276 return -error;
1277
1278 /* copy back header */
1279 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1280 return -XFS_ERROR(EFAULT);
1281
1282 return 0;
1283 }
1284
1285 /*
1286 * Note: some of the ioctl's return positive numbers as a
1287 * byte count indicating success, such as readlink_by_handle.
1288 * So we don't "sign flip" like most other routines. This means
1289 * true errors need to be returned as a negative value.
1290 */
1291 long
1292 xfs_file_ioctl(
1293 struct file *filp,
1294 unsigned int cmd,
1295 unsigned long p)
1296 {
1297 struct inode *inode = filp->f_path.dentry->d_inode;
1298 struct xfs_inode *ip = XFS_I(inode);
1299 struct xfs_mount *mp = ip->i_mount;
1300 void __user *arg = (void __user *)p;
1301 int ioflags = 0;
1302 int error;
1303
1304 if (filp->f_mode & FMODE_NOCMTIME)
1305 ioflags |= IO_INVIS;
1306
1307 xfs_itrace_entry(ip);
1308
1309 switch (cmd) {
1310 case XFS_IOC_ALLOCSP:
1311 case XFS_IOC_FREESP:
1312 case XFS_IOC_RESVSP:
1313 case XFS_IOC_UNRESVSP:
1314 case XFS_IOC_ALLOCSP64:
1315 case XFS_IOC_FREESP64:
1316 case XFS_IOC_RESVSP64:
1317 case XFS_IOC_UNRESVSP64: {
1318 xfs_flock64_t bf;
1319
1320 if (copy_from_user(&bf, arg, sizeof(bf)))
1321 return -XFS_ERROR(EFAULT);
1322 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1323 }
1324 case XFS_IOC_DIOINFO: {
1325 struct dioattr da;
1326 xfs_buftarg_t *target =
1327 XFS_IS_REALTIME_INODE(ip) ?
1328 mp->m_rtdev_targp : mp->m_ddev_targp;
1329
1330 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1331 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1332
1333 if (copy_to_user(arg, &da, sizeof(da)))
1334 return -XFS_ERROR(EFAULT);
1335 return 0;
1336 }
1337
1338 case XFS_IOC_FSBULKSTAT_SINGLE:
1339 case XFS_IOC_FSBULKSTAT:
1340 case XFS_IOC_FSINUMBERS:
1341 return xfs_ioc_bulkstat(mp, cmd, arg);
1342
1343 case XFS_IOC_FSGEOMETRY_V1:
1344 return xfs_ioc_fsgeometry_v1(mp, arg);
1345
1346 case XFS_IOC_FSGEOMETRY:
1347 return xfs_ioc_fsgeometry(mp, arg);
1348
1349 case XFS_IOC_GETVERSION:
1350 return put_user(inode->i_generation, (int __user *)arg);
1351
1352 case XFS_IOC_FSGETXATTR:
1353 return xfs_ioc_fsgetxattr(ip, 0, arg);
1354 case XFS_IOC_FSGETXATTRA:
1355 return xfs_ioc_fsgetxattr(ip, 1, arg);
1356 case XFS_IOC_FSSETXATTR:
1357 return xfs_ioc_fssetxattr(ip, filp, arg);
1358 case XFS_IOC_GETXFLAGS:
1359 return xfs_ioc_getxflags(ip, arg);
1360 case XFS_IOC_SETXFLAGS:
1361 return xfs_ioc_setxflags(ip, filp, arg);
1362
1363 case XFS_IOC_FSSETDM: {
1364 struct fsdmidata dmi;
1365
1366 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1367 return -XFS_ERROR(EFAULT);
1368
1369 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1370 dmi.fsd_dmstate);
1371 return -error;
1372 }
1373
1374 case XFS_IOC_GETBMAP:
1375 case XFS_IOC_GETBMAPA:
1376 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1377
1378 case XFS_IOC_GETBMAPX:
1379 return xfs_ioc_getbmapx(ip, arg);
1380
1381 case XFS_IOC_FD_TO_HANDLE:
1382 case XFS_IOC_PATH_TO_HANDLE:
1383 case XFS_IOC_PATH_TO_FSHANDLE: {
1384 xfs_fsop_handlereq_t hreq;
1385
1386 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1387 return -XFS_ERROR(EFAULT);
1388 return xfs_find_handle(cmd, &hreq);
1389 }
1390 case XFS_IOC_OPEN_BY_HANDLE: {
1391 xfs_fsop_handlereq_t hreq;
1392
1393 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1394 return -XFS_ERROR(EFAULT);
1395 return xfs_open_by_handle(filp, &hreq);
1396 }
1397 case XFS_IOC_FSSETDM_BY_HANDLE:
1398 return xfs_fssetdm_by_handle(filp, arg);
1399
1400 case XFS_IOC_READLINK_BY_HANDLE: {
1401 xfs_fsop_handlereq_t hreq;
1402
1403 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1404 return -XFS_ERROR(EFAULT);
1405 return xfs_readlink_by_handle(filp, &hreq);
1406 }
1407 case XFS_IOC_ATTRLIST_BY_HANDLE:
1408 return xfs_attrlist_by_handle(filp, arg);
1409
1410 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1411 return xfs_attrmulti_by_handle(filp, arg);
1412
1413 case XFS_IOC_SWAPEXT: {
1414 struct xfs_swapext sxp;
1415
1416 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1417 return -XFS_ERROR(EFAULT);
1418 error = xfs_swapext(&sxp);
1419 return -error;
1420 }
1421
1422 case XFS_IOC_FSCOUNTS: {
1423 xfs_fsop_counts_t out;
1424
1425 error = xfs_fs_counts(mp, &out);
1426 if (error)
1427 return -error;
1428
1429 if (copy_to_user(arg, &out, sizeof(out)))
1430 return -XFS_ERROR(EFAULT);
1431 return 0;
1432 }
1433
1434 case XFS_IOC_SET_RESBLKS: {
1435 xfs_fsop_resblks_t inout;
1436 __uint64_t in;
1437
1438 if (!capable(CAP_SYS_ADMIN))
1439 return -EPERM;
1440
1441 if (copy_from_user(&inout, arg, sizeof(inout)))
1442 return -XFS_ERROR(EFAULT);
1443
1444 /* input parameter is passed in resblks field of structure */
1445 in = inout.resblks;
1446 error = xfs_reserve_blocks(mp, &in, &inout);
1447 if (error)
1448 return -error;
1449
1450 if (copy_to_user(arg, &inout, sizeof(inout)))
1451 return -XFS_ERROR(EFAULT);
1452 return 0;
1453 }
1454
1455 case XFS_IOC_GET_RESBLKS: {
1456 xfs_fsop_resblks_t out;
1457
1458 if (!capable(CAP_SYS_ADMIN))
1459 return -EPERM;
1460
1461 error = xfs_reserve_blocks(mp, NULL, &out);
1462 if (error)
1463 return -error;
1464
1465 if (copy_to_user(arg, &out, sizeof(out)))
1466 return -XFS_ERROR(EFAULT);
1467
1468 return 0;
1469 }
1470
1471 case XFS_IOC_FSGROWFSDATA: {
1472 xfs_growfs_data_t in;
1473
1474 if (copy_from_user(&in, arg, sizeof(in)))
1475 return -XFS_ERROR(EFAULT);
1476
1477 error = xfs_growfs_data(mp, &in);
1478 return -error;
1479 }
1480
1481 case XFS_IOC_FSGROWFSLOG: {
1482 xfs_growfs_log_t in;
1483
1484 if (copy_from_user(&in, arg, sizeof(in)))
1485 return -XFS_ERROR(EFAULT);
1486
1487 error = xfs_growfs_log(mp, &in);
1488 return -error;
1489 }
1490
1491 case XFS_IOC_FSGROWFSRT: {
1492 xfs_growfs_rt_t in;
1493
1494 if (copy_from_user(&in, arg, sizeof(in)))
1495 return -XFS_ERROR(EFAULT);
1496
1497 error = xfs_growfs_rt(mp, &in);
1498 return -error;
1499 }
1500
1501 case XFS_IOC_GOINGDOWN: {
1502 __uint32_t in;
1503
1504 if (!capable(CAP_SYS_ADMIN))
1505 return -EPERM;
1506
1507 if (get_user(in, (__uint32_t __user *)arg))
1508 return -XFS_ERROR(EFAULT);
1509
1510 error = xfs_fs_goingdown(mp, in);
1511 return -error;
1512 }
1513
1514 case XFS_IOC_ERROR_INJECTION: {
1515 xfs_error_injection_t in;
1516
1517 if (!capable(CAP_SYS_ADMIN))
1518 return -EPERM;
1519
1520 if (copy_from_user(&in, arg, sizeof(in)))
1521 return -XFS_ERROR(EFAULT);
1522
1523 error = xfs_errortag_add(in.errtag, mp);
1524 return -error;
1525 }
1526
1527 case XFS_IOC_ERROR_CLEARALL:
1528 if (!capable(CAP_SYS_ADMIN))
1529 return -EPERM;
1530
1531 error = xfs_errortag_clearall(mp, 1);
1532 return -error;
1533
1534 default:
1535 return -ENOTTY;
1536 }
1537 }
Linux kernel - Deliverables
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