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[mirror_ubuntu-zesty-kernel.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_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_attr.h"
45 #include "xfs_bmap.h"
46 #include "xfs_buf_item.h"
47 #include "xfs_utils.h"
48 #include "xfs_dfrag.h"
49 #include "xfs_fsops.h"
50 #include "xfs_vnodeops.h"
51 #include "xfs_quota.h"
52 #include "xfs_inode_item.h"
53 #include "xfs_export.h"
54 #include "xfs_trace.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/slab.h>
62 #include <linux/exportfs.h>
63
64 /*
65 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
66 * a file or fs handle.
67 *
68 * XFS_IOC_PATH_TO_FSHANDLE
69 * returns fs handle for a mount point or path within that mount point
70 * XFS_IOC_FD_TO_HANDLE
71 * returns full handle for a FD opened in user space
72 * XFS_IOC_PATH_TO_HANDLE
73 * returns full handle for a path
74 */
75 int
76 xfs_find_handle(
77 unsigned int cmd,
78 xfs_fsop_handlereq_t *hreq)
79 {
80 int hsize;
81 xfs_handle_t handle;
82 struct inode *inode;
83 struct file *file = NULL;
84 struct path path;
85 int error;
86 struct xfs_inode *ip;
87
88 if (cmd == XFS_IOC_FD_TO_HANDLE) {
89 file = fget(hreq->fd);
90 if (!file)
91 return -EBADF;
92 inode = file->f_path.dentry->d_inode;
93 } else {
94 error = user_lpath((const char __user *)hreq->path, &path);
95 if (error)
96 return error;
97 inode = path.dentry->d_inode;
98 }
99 ip = XFS_I(inode);
100
101 /*
102 * We can only generate handles for inodes residing on a XFS filesystem,
103 * and only for regular files, directories or symbolic links.
104 */
105 error = -EINVAL;
106 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
107 goto out_put;
108
109 error = -EBADF;
110 if (!S_ISREG(inode->i_mode) &&
111 !S_ISDIR(inode->i_mode) &&
112 !S_ISLNK(inode->i_mode))
113 goto out_put;
114
115
116 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
117
118 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
119 /*
120 * This handle only contains an fsid, zero the rest.
121 */
122 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
123 hsize = sizeof(xfs_fsid_t);
124 } else {
125 int lock_mode;
126
127 lock_mode = xfs_ilock_map_shared(ip);
128 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
129 sizeof(handle.ha_fid.fid_len);
130 handle.ha_fid.fid_pad = 0;
131 handle.ha_fid.fid_gen = ip->i_d.di_gen;
132 handle.ha_fid.fid_ino = ip->i_ino;
133 xfs_iunlock_map_shared(ip, lock_mode);
134
135 hsize = XFS_HSIZE(handle);
136 }
137
138 error = -EFAULT;
139 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
140 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
141 goto out_put;
142
143 error = 0;
144
145 out_put:
146 if (cmd == XFS_IOC_FD_TO_HANDLE)
147 fput(file);
148 else
149 path_put(&path);
150 return error;
151 }
152
153 /*
154 * No need to do permission checks on the various pathname components
155 * as the handle operations are privileged.
156 */
157 STATIC int
158 xfs_handle_acceptable(
159 void *context,
160 struct dentry *dentry)
161 {
162 return 1;
163 }
164
165 /*
166 * Convert userspace handle data into a dentry.
167 */
168 struct dentry *
169 xfs_handle_to_dentry(
170 struct file *parfilp,
171 void __user *uhandle,
172 u32 hlen)
173 {
174 xfs_handle_t handle;
175 struct xfs_fid64 fid;
176
177 /*
178 * Only allow handle opens under a directory.
179 */
180 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
181 return ERR_PTR(-ENOTDIR);
182
183 if (hlen != sizeof(xfs_handle_t))
184 return ERR_PTR(-EINVAL);
185 if (copy_from_user(&handle, uhandle, hlen))
186 return ERR_PTR(-EFAULT);
187 if (handle.ha_fid.fid_len !=
188 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
189 return ERR_PTR(-EINVAL);
190
191 memset(&fid, 0, sizeof(struct fid));
192 fid.ino = handle.ha_fid.fid_ino;
193 fid.gen = handle.ha_fid.fid_gen;
194
195 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
196 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
197 xfs_handle_acceptable, NULL);
198 }
199
200 STATIC struct dentry *
201 xfs_handlereq_to_dentry(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
204 {
205 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
206 }
207
208 int
209 xfs_open_by_handle(
210 struct file *parfilp,
211 xfs_fsop_handlereq_t *hreq)
212 {
213 const struct cred *cred = current_cred();
214 int error;
215 int fd;
216 int permflag;
217 struct file *filp;
218 struct inode *inode;
219 struct dentry *dentry;
220
221 if (!capable(CAP_SYS_ADMIN))
222 return -XFS_ERROR(EPERM);
223
224 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
225 if (IS_ERR(dentry))
226 return PTR_ERR(dentry);
227 inode = dentry->d_inode;
228
229 /* Restrict xfs_open_by_handle to directories & regular files. */
230 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
231 error = -XFS_ERROR(EPERM);
232 goto out_dput;
233 }
234
235 #if BITS_PER_LONG != 32
236 hreq->oflags |= O_LARGEFILE;
237 #endif
238
239 /* Put open permission in namei format. */
240 permflag = hreq->oflags;
241 if ((permflag+1) & O_ACCMODE)
242 permflag++;
243 if (permflag & O_TRUNC)
244 permflag |= 2;
245
246 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
247 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
248 error = -XFS_ERROR(EPERM);
249 goto out_dput;
250 }
251
252 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
253 error = -XFS_ERROR(EACCES);
254 goto out_dput;
255 }
256
257 /* Can't write directories. */
258 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
259 error = -XFS_ERROR(EISDIR);
260 goto out_dput;
261 }
262
263 fd = get_unused_fd();
264 if (fd < 0) {
265 error = fd;
266 goto out_dput;
267 }
268
269 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
270 hreq->oflags, cred);
271 if (IS_ERR(filp)) {
272 put_unused_fd(fd);
273 return PTR_ERR(filp);
274 }
275
276 if (inode->i_mode & S_IFREG) {
277 filp->f_flags |= O_NOATIME;
278 filp->f_mode |= FMODE_NOCMTIME;
279 }
280
281 fd_install(fd, filp);
282 return fd;
283
284 out_dput:
285 dput(dentry);
286 return error;
287 }
288
289 /*
290 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
291 * unused first argument.
292 */
293 STATIC int
294 do_readlink(
295 char __user *buffer,
296 int buflen,
297 const char *link)
298 {
299 int len;
300
301 len = PTR_ERR(link);
302 if (IS_ERR(link))
303 goto out;
304
305 len = strlen(link);
306 if (len > (unsigned) buflen)
307 len = buflen;
308 if (copy_to_user(buffer, link, len))
309 len = -EFAULT;
310 out:
311 return len;
312 }
313
314
315 int
316 xfs_readlink_by_handle(
317 struct file *parfilp,
318 xfs_fsop_handlereq_t *hreq)
319 {
320 struct dentry *dentry;
321 __u32 olen;
322 void *link;
323 int error;
324
325 if (!capable(CAP_SYS_ADMIN))
326 return -XFS_ERROR(EPERM);
327
328 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
329 if (IS_ERR(dentry))
330 return PTR_ERR(dentry);
331
332 /* Restrict this handle operation to symlinks only. */
333 if (!S_ISLNK(dentry->d_inode->i_mode)) {
334 error = -XFS_ERROR(EINVAL);
335 goto out_dput;
336 }
337
338 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
339 error = -XFS_ERROR(EFAULT);
340 goto out_dput;
341 }
342
343 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
344 if (!link) {
345 error = -XFS_ERROR(ENOMEM);
346 goto out_dput;
347 }
348
349 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
350 if (error)
351 goto out_kfree;
352 error = do_readlink(hreq->ohandle, olen, link);
353 if (error)
354 goto out_kfree;
355
356 out_kfree:
357 kfree(link);
358 out_dput:
359 dput(dentry);
360 return error;
361 }
362
363 STATIC int
364 xfs_fssetdm_by_handle(
365 struct file *parfilp,
366 void __user *arg)
367 {
368 int error;
369 struct fsdmidata fsd;
370 xfs_fsop_setdm_handlereq_t dmhreq;
371 struct dentry *dentry;
372
373 if (!capable(CAP_MKNOD))
374 return -XFS_ERROR(EPERM);
375 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
376 return -XFS_ERROR(EFAULT);
377
378 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
379 if (IS_ERR(dentry))
380 return PTR_ERR(dentry);
381
382 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
383 error = -XFS_ERROR(EPERM);
384 goto out;
385 }
386
387 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
388 error = -XFS_ERROR(EFAULT);
389 goto out;
390 }
391
392 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
393 fsd.fsd_dmstate);
394
395 out:
396 dput(dentry);
397 return error;
398 }
399
400 STATIC int
401 xfs_attrlist_by_handle(
402 struct file *parfilp,
403 void __user *arg)
404 {
405 int error = -ENOMEM;
406 attrlist_cursor_kern_t *cursor;
407 xfs_fsop_attrlist_handlereq_t al_hreq;
408 struct dentry *dentry;
409 char *kbuf;
410
411 if (!capable(CAP_SYS_ADMIN))
412 return -XFS_ERROR(EPERM);
413 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
414 return -XFS_ERROR(EFAULT);
415 if (al_hreq.buflen > XATTR_LIST_MAX)
416 return -XFS_ERROR(EINVAL);
417
418 /*
419 * Reject flags, only allow namespaces.
420 */
421 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
422 return -XFS_ERROR(EINVAL);
423
424 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
425 if (IS_ERR(dentry))
426 return PTR_ERR(dentry);
427
428 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
429 if (!kbuf)
430 goto out_dput;
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 kfree(kbuf);
443 out_dput:
444 dput(dentry);
445 return error;
446 }
447
448 int
449 xfs_attrmulti_attr_get(
450 struct inode *inode,
451 unsigned char *name,
452 unsigned char __user *ubuf,
453 __uint32_t *len,
454 __uint32_t flags)
455 {
456 unsigned char *kbuf;
457 int error = EFAULT;
458
459 if (*len > XATTR_SIZE_MAX)
460 return EINVAL;
461 kbuf = kmalloc(*len, GFP_KERNEL);
462 if (!kbuf)
463 return ENOMEM;
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 kfree(kbuf);
474 return error;
475 }
476
477 int
478 xfs_attrmulti_attr_set(
479 struct inode *inode,
480 unsigned char *name,
481 const unsigned char __user *ubuf,
482 __uint32_t len,
483 __uint32_t flags)
484 {
485 unsigned char *kbuf;
486 int error = EFAULT;
487
488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
489 return EPERM;
490 if (len > XATTR_SIZE_MAX)
491 return EINVAL;
492
493 kbuf = memdup_user(ubuf, len);
494 if (IS_ERR(kbuf))
495 return PTR_ERR(kbuf);
496
497 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
498
499 return error;
500 }
501
502 int
503 xfs_attrmulti_attr_remove(
504 struct inode *inode,
505 unsigned char *name,
506 __uint32_t flags)
507 {
508 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
509 return EPERM;
510 return xfs_attr_remove(XFS_I(inode), name, flags);
511 }
512
513 STATIC int
514 xfs_attrmulti_by_handle(
515 struct file *parfilp,
516 void __user *arg)
517 {
518 int error;
519 xfs_attr_multiop_t *ops;
520 xfs_fsop_attrmulti_handlereq_t am_hreq;
521 struct dentry *dentry;
522 unsigned int i, size;
523 unsigned char *attr_name;
524
525 if (!capable(CAP_SYS_ADMIN))
526 return -XFS_ERROR(EPERM);
527 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
528 return -XFS_ERROR(EFAULT);
529
530 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
531 if (IS_ERR(dentry))
532 return PTR_ERR(dentry);
533
534 error = E2BIG;
535 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
536 if (!size || size > 16 * PAGE_SIZE)
537 goto out_dput;
538
539 ops = memdup_user(am_hreq.ops, size);
540 if (IS_ERR(ops)) {
541 error = PTR_ERR(ops);
542 goto out_dput;
543 }
544
545 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
546 if (!attr_name)
547 goto out_kfree_ops;
548
549 error = 0;
550 for (i = 0; i < am_hreq.opcount; i++) {
551 ops[i].am_error = strncpy_from_user((char *)attr_name,
552 ops[i].am_attrname, MAXNAMELEN);
553 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
554 error = -ERANGE;
555 if (ops[i].am_error < 0)
556 break;
557
558 switch (ops[i].am_opcode) {
559 case ATTR_OP_GET:
560 ops[i].am_error = xfs_attrmulti_attr_get(
561 dentry->d_inode, attr_name,
562 ops[i].am_attrvalue, &ops[i].am_length,
563 ops[i].am_flags);
564 break;
565 case ATTR_OP_SET:
566 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
567 if (ops[i].am_error)
568 break;
569 ops[i].am_error = xfs_attrmulti_attr_set(
570 dentry->d_inode, attr_name,
571 ops[i].am_attrvalue, ops[i].am_length,
572 ops[i].am_flags);
573 mnt_drop_write(parfilp->f_path.mnt);
574 break;
575 case ATTR_OP_REMOVE:
576 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
577 if (ops[i].am_error)
578 break;
579 ops[i].am_error = xfs_attrmulti_attr_remove(
580 dentry->d_inode, attr_name,
581 ops[i].am_flags);
582 mnt_drop_write(parfilp->f_path.mnt);
583 break;
584 default:
585 ops[i].am_error = EINVAL;
586 }
587 }
588
589 if (copy_to_user(am_hreq.ops, ops, size))
590 error = XFS_ERROR(EFAULT);
591
592 kfree(attr_name);
593 out_kfree_ops:
594 kfree(ops);
595 out_dput:
596 dput(dentry);
597 return -error;
598 }
599
600 int
601 xfs_ioc_space(
602 struct xfs_inode *ip,
603 struct inode *inode,
604 struct file *filp,
605 int ioflags,
606 unsigned int cmd,
607 xfs_flock64_t *bf)
608 {
609 int attr_flags = 0;
610 int error;
611
612 /*
613 * Only allow the sys admin to reserve space unless
614 * unwritten extents are enabled.
615 */
616 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
617 !capable(CAP_SYS_ADMIN))
618 return -XFS_ERROR(EPERM);
619
620 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
621 return -XFS_ERROR(EPERM);
622
623 if (!(filp->f_mode & FMODE_WRITE))
624 return -XFS_ERROR(EBADF);
625
626 if (!S_ISREG(inode->i_mode))
627 return -XFS_ERROR(EINVAL);
628
629 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
630 attr_flags |= XFS_ATTR_NONBLOCK;
631 if (ioflags & IO_INVIS)
632 attr_flags |= XFS_ATTR_DMI;
633
634 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
635 return -error;
636 }
637
638 STATIC int
639 xfs_ioc_bulkstat(
640 xfs_mount_t *mp,
641 unsigned int cmd,
642 void __user *arg)
643 {
644 xfs_fsop_bulkreq_t bulkreq;
645 int count; /* # of records returned */
646 xfs_ino_t inlast; /* last inode number */
647 int done;
648 int error;
649
650 /* done = 1 if there are more stats to get and if bulkstat */
651 /* should be called again (unused here, but used in dmapi) */
652
653 if (!capable(CAP_SYS_ADMIN))
654 return -EPERM;
655
656 if (XFS_FORCED_SHUTDOWN(mp))
657 return -XFS_ERROR(EIO);
658
659 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
660 return -XFS_ERROR(EFAULT);
661
662 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
663 return -XFS_ERROR(EFAULT);
664
665 if ((count = bulkreq.icount) <= 0)
666 return -XFS_ERROR(EINVAL);
667
668 if (bulkreq.ubuffer == NULL)
669 return -XFS_ERROR(EINVAL);
670
671 if (cmd == XFS_IOC_FSINUMBERS)
672 error = xfs_inumbers(mp, &inlast, &count,
673 bulkreq.ubuffer, xfs_inumbers_fmt);
674 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
675 error = xfs_bulkstat_single(mp, &inlast,
676 bulkreq.ubuffer, &done);
677 else /* XFS_IOC_FSBULKSTAT */
678 error = xfs_bulkstat(mp, &inlast, &count,
679 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
680 sizeof(xfs_bstat_t), bulkreq.ubuffer,
681 BULKSTAT_FG_QUICK, &done);
682
683 if (error)
684 return -error;
685
686 if (bulkreq.ocount != NULL) {
687 if (copy_to_user(bulkreq.lastip, &inlast,
688 sizeof(xfs_ino_t)))
689 return -XFS_ERROR(EFAULT);
690
691 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
692 return -XFS_ERROR(EFAULT);
693 }
694
695 return 0;
696 }
697
698 STATIC int
699 xfs_ioc_fsgeometry_v1(
700 xfs_mount_t *mp,
701 void __user *arg)
702 {
703 xfs_fsop_geom_v1_t fsgeo;
704 int error;
705
706 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
707 if (error)
708 return -error;
709
710 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
711 return -XFS_ERROR(EFAULT);
712 return 0;
713 }
714
715 STATIC int
716 xfs_ioc_fsgeometry(
717 xfs_mount_t *mp,
718 void __user *arg)
719 {
720 xfs_fsop_geom_t fsgeo;
721 int error;
722
723 error = xfs_fs_geometry(mp, &fsgeo, 4);
724 if (error)
725 return -error;
726
727 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
728 return -XFS_ERROR(EFAULT);
729 return 0;
730 }
731
732 /*
733 * Linux extended inode flags interface.
734 */
735
736 STATIC unsigned int
737 xfs_merge_ioc_xflags(
738 unsigned int flags,
739 unsigned int start)
740 {
741 unsigned int xflags = start;
742
743 if (flags & FS_IMMUTABLE_FL)
744 xflags |= XFS_XFLAG_IMMUTABLE;
745 else
746 xflags &= ~XFS_XFLAG_IMMUTABLE;
747 if (flags & FS_APPEND_FL)
748 xflags |= XFS_XFLAG_APPEND;
749 else
750 xflags &= ~XFS_XFLAG_APPEND;
751 if (flags & FS_SYNC_FL)
752 xflags |= XFS_XFLAG_SYNC;
753 else
754 xflags &= ~XFS_XFLAG_SYNC;
755 if (flags & FS_NOATIME_FL)
756 xflags |= XFS_XFLAG_NOATIME;
757 else
758 xflags &= ~XFS_XFLAG_NOATIME;
759 if (flags & FS_NODUMP_FL)
760 xflags |= XFS_XFLAG_NODUMP;
761 else
762 xflags &= ~XFS_XFLAG_NODUMP;
763
764 return xflags;
765 }
766
767 STATIC unsigned int
768 xfs_di2lxflags(
769 __uint16_t di_flags)
770 {
771 unsigned int flags = 0;
772
773 if (di_flags & XFS_DIFLAG_IMMUTABLE)
774 flags |= FS_IMMUTABLE_FL;
775 if (di_flags & XFS_DIFLAG_APPEND)
776 flags |= FS_APPEND_FL;
777 if (di_flags & XFS_DIFLAG_SYNC)
778 flags |= FS_SYNC_FL;
779 if (di_flags & XFS_DIFLAG_NOATIME)
780 flags |= FS_NOATIME_FL;
781 if (di_flags & XFS_DIFLAG_NODUMP)
782 flags |= FS_NODUMP_FL;
783 return flags;
784 }
785
786 STATIC int
787 xfs_ioc_fsgetxattr(
788 xfs_inode_t *ip,
789 int attr,
790 void __user *arg)
791 {
792 struct fsxattr fa;
793
794 xfs_ilock(ip, XFS_ILOCK_SHARED);
795 fa.fsx_xflags = xfs_ip2xflags(ip);
796 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
797 fa.fsx_projid = ip->i_d.di_projid;
798
799 if (attr) {
800 if (ip->i_afp) {
801 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
802 fa.fsx_nextents = ip->i_afp->if_bytes /
803 sizeof(xfs_bmbt_rec_t);
804 else
805 fa.fsx_nextents = ip->i_d.di_anextents;
806 } else
807 fa.fsx_nextents = 0;
808 } else {
809 if (ip->i_df.if_flags & XFS_IFEXTENTS)
810 fa.fsx_nextents = ip->i_df.if_bytes /
811 sizeof(xfs_bmbt_rec_t);
812 else
813 fa.fsx_nextents = ip->i_d.di_nextents;
814 }
815 xfs_iunlock(ip, XFS_ILOCK_SHARED);
816
817 if (copy_to_user(arg, &fa, sizeof(fa)))
818 return -EFAULT;
819 return 0;
820 }
821
822 STATIC void
823 xfs_set_diflags(
824 struct xfs_inode *ip,
825 unsigned int xflags)
826 {
827 unsigned int di_flags;
828
829 /* can't set PREALLOC this way, just preserve it */
830 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
831 if (xflags & XFS_XFLAG_IMMUTABLE)
832 di_flags |= XFS_DIFLAG_IMMUTABLE;
833 if (xflags & XFS_XFLAG_APPEND)
834 di_flags |= XFS_DIFLAG_APPEND;
835 if (xflags & XFS_XFLAG_SYNC)
836 di_flags |= XFS_DIFLAG_SYNC;
837 if (xflags & XFS_XFLAG_NOATIME)
838 di_flags |= XFS_DIFLAG_NOATIME;
839 if (xflags & XFS_XFLAG_NODUMP)
840 di_flags |= XFS_DIFLAG_NODUMP;
841 if (xflags & XFS_XFLAG_PROJINHERIT)
842 di_flags |= XFS_DIFLAG_PROJINHERIT;
843 if (xflags & XFS_XFLAG_NODEFRAG)
844 di_flags |= XFS_DIFLAG_NODEFRAG;
845 if (xflags & XFS_XFLAG_FILESTREAM)
846 di_flags |= XFS_DIFLAG_FILESTREAM;
847 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
848 if (xflags & XFS_XFLAG_RTINHERIT)
849 di_flags |= XFS_DIFLAG_RTINHERIT;
850 if (xflags & XFS_XFLAG_NOSYMLINKS)
851 di_flags |= XFS_DIFLAG_NOSYMLINKS;
852 if (xflags & XFS_XFLAG_EXTSZINHERIT)
853 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
854 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
855 if (xflags & XFS_XFLAG_REALTIME)
856 di_flags |= XFS_DIFLAG_REALTIME;
857 if (xflags & XFS_XFLAG_EXTSIZE)
858 di_flags |= XFS_DIFLAG_EXTSIZE;
859 }
860
861 ip->i_d.di_flags = di_flags;
862 }
863
864 STATIC void
865 xfs_diflags_to_linux(
866 struct xfs_inode *ip)
867 {
868 struct inode *inode = VFS_I(ip);
869 unsigned int xflags = xfs_ip2xflags(ip);
870
871 if (xflags & XFS_XFLAG_IMMUTABLE)
872 inode->i_flags |= S_IMMUTABLE;
873 else
874 inode->i_flags &= ~S_IMMUTABLE;
875 if (xflags & XFS_XFLAG_APPEND)
876 inode->i_flags |= S_APPEND;
877 else
878 inode->i_flags &= ~S_APPEND;
879 if (xflags & XFS_XFLAG_SYNC)
880 inode->i_flags |= S_SYNC;
881 else
882 inode->i_flags &= ~S_SYNC;
883 if (xflags & XFS_XFLAG_NOATIME)
884 inode->i_flags |= S_NOATIME;
885 else
886 inode->i_flags &= ~S_NOATIME;
887 }
888
889 #define FSX_PROJID 1
890 #define FSX_EXTSIZE 2
891 #define FSX_XFLAGS 4
892 #define FSX_NONBLOCK 8
893
894 STATIC int
895 xfs_ioctl_setattr(
896 xfs_inode_t *ip,
897 struct fsxattr *fa,
898 int mask)
899 {
900 struct xfs_mount *mp = ip->i_mount;
901 struct xfs_trans *tp;
902 unsigned int lock_flags = 0;
903 struct xfs_dquot *udqp = NULL;
904 struct xfs_dquot *gdqp = NULL;
905 struct xfs_dquot *olddquot = NULL;
906 int code;
907
908 xfs_itrace_entry(ip);
909
910 if (mp->m_flags & XFS_MOUNT_RDONLY)
911 return XFS_ERROR(EROFS);
912 if (XFS_FORCED_SHUTDOWN(mp))
913 return XFS_ERROR(EIO);
914
915 /*
916 * If disk quotas is on, we make sure that the dquots do exist on disk,
917 * before we start any other transactions. Trying to do this later
918 * is messy. We don't care to take a readlock to look at the ids
919 * in inode here, because we can't hold it across the trans_reserve.
920 * If the IDs do change before we take the ilock, we're covered
921 * because the i_*dquot fields will get updated anyway.
922 */
923 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
924 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
925 ip->i_d.di_gid, fa->fsx_projid,
926 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
927 if (code)
928 return code;
929 }
930
931 /*
932 * For the other attributes, we acquire the inode lock and
933 * first do an error checking pass.
934 */
935 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
936 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
937 if (code)
938 goto error_return;
939
940 lock_flags = XFS_ILOCK_EXCL;
941 xfs_ilock(ip, lock_flags);
942
943 /*
944 * CAP_FOWNER overrides the following restrictions:
945 *
946 * The user ID of the calling process must be equal
947 * to the file owner ID, except in cases where the
948 * CAP_FSETID capability is applicable.
949 */
950 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
951 code = XFS_ERROR(EPERM);
952 goto error_return;
953 }
954
955 /*
956 * Do a quota reservation only if projid is actually going to change.
957 */
958 if (mask & FSX_PROJID) {
959 if (XFS_IS_QUOTA_RUNNING(mp) &&
960 XFS_IS_PQUOTA_ON(mp) &&
961 ip->i_d.di_projid != fa->fsx_projid) {
962 ASSERT(tp);
963 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
964 capable(CAP_FOWNER) ?
965 XFS_QMOPT_FORCE_RES : 0);
966 if (code) /* out of quota */
967 goto error_return;
968 }
969 }
970
971 if (mask & FSX_EXTSIZE) {
972 /*
973 * Can't change extent size if any extents are allocated.
974 */
975 if (ip->i_d.di_nextents &&
976 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
977 fa->fsx_extsize)) {
978 code = XFS_ERROR(EINVAL); /* EFBIG? */
979 goto error_return;
980 }
981
982 /*
983 * Extent size must be a multiple of the appropriate block
984 * size, if set at all.
985 */
986 if (fa->fsx_extsize != 0) {
987 xfs_extlen_t size;
988
989 if (XFS_IS_REALTIME_INODE(ip) ||
990 ((mask & FSX_XFLAGS) &&
991 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
992 size = mp->m_sb.sb_rextsize <<
993 mp->m_sb.sb_blocklog;
994 } else {
995 size = mp->m_sb.sb_blocksize;
996 }
997
998 if (fa->fsx_extsize % size) {
999 code = XFS_ERROR(EINVAL);
1000 goto error_return;
1001 }
1002 }
1003 }
1004
1005
1006 if (mask & FSX_XFLAGS) {
1007 /*
1008 * Can't change realtime flag if any extents are allocated.
1009 */
1010 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1011 (XFS_IS_REALTIME_INODE(ip)) !=
1012 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1013 code = XFS_ERROR(EINVAL); /* EFBIG? */
1014 goto error_return;
1015 }
1016
1017 /*
1018 * If realtime flag is set then must have realtime data.
1019 */
1020 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1021 if ((mp->m_sb.sb_rblocks == 0) ||
1022 (mp->m_sb.sb_rextsize == 0) ||
1023 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1024 code = XFS_ERROR(EINVAL);
1025 goto error_return;
1026 }
1027 }
1028
1029 /*
1030 * Can't modify an immutable/append-only file unless
1031 * we have appropriate permission.
1032 */
1033 if ((ip->i_d.di_flags &
1034 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1035 (fa->fsx_xflags &
1036 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1037 !capable(CAP_LINUX_IMMUTABLE)) {
1038 code = XFS_ERROR(EPERM);
1039 goto error_return;
1040 }
1041 }
1042
1043 xfs_trans_ijoin(tp, ip, lock_flags);
1044 xfs_trans_ihold(tp, ip);
1045
1046 /*
1047 * Change file ownership. Must be the owner or privileged.
1048 */
1049 if (mask & FSX_PROJID) {
1050 /*
1051 * CAP_FSETID overrides the following restrictions:
1052 *
1053 * The set-user-ID and set-group-ID bits of a file will be
1054 * cleared upon successful return from chown()
1055 */
1056 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1057 !capable(CAP_FSETID))
1058 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1059
1060 /*
1061 * Change the ownerships and register quota modifications
1062 * in the transaction.
1063 */
1064 if (ip->i_d.di_projid != fa->fsx_projid) {
1065 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1066 olddquot = xfs_qm_vop_chown(tp, ip,
1067 &ip->i_gdquot, gdqp);
1068 }
1069 ip->i_d.di_projid = fa->fsx_projid;
1070
1071 /*
1072 * We may have to rev the inode as well as
1073 * the superblock version number since projids didn't
1074 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1075 */
1076 if (ip->i_d.di_version == 1)
1077 xfs_bump_ino_vers2(tp, ip);
1078 }
1079
1080 }
1081
1082 if (mask & FSX_EXTSIZE)
1083 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1084 if (mask & FSX_XFLAGS) {
1085 xfs_set_diflags(ip, fa->fsx_xflags);
1086 xfs_diflags_to_linux(ip);
1087 }
1088
1089 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1090 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1091
1092 XFS_STATS_INC(xs_ig_attrchg);
1093
1094 /*
1095 * If this is a synchronous mount, make sure that the
1096 * transaction goes to disk before returning to the user.
1097 * This is slightly sub-optimal in that truncates require
1098 * two sync transactions instead of one for wsync filesystems.
1099 * One for the truncate and one for the timestamps since we
1100 * don't want to change the timestamps unless we're sure the
1101 * truncate worked. Truncates are less than 1% of the laddis
1102 * mix so this probably isn't worth the trouble to optimize.
1103 */
1104 if (mp->m_flags & XFS_MOUNT_WSYNC)
1105 xfs_trans_set_sync(tp);
1106 code = xfs_trans_commit(tp, 0);
1107 xfs_iunlock(ip, lock_flags);
1108
1109 /*
1110 * Release any dquot(s) the inode had kept before chown.
1111 */
1112 xfs_qm_dqrele(olddquot);
1113 xfs_qm_dqrele(udqp);
1114 xfs_qm_dqrele(gdqp);
1115
1116 if (code)
1117 return code;
1118
1119 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1120 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1121 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1122 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1123 }
1124
1125 return 0;
1126
1127 error_return:
1128 xfs_qm_dqrele(udqp);
1129 xfs_qm_dqrele(gdqp);
1130 xfs_trans_cancel(tp, 0);
1131 if (lock_flags)
1132 xfs_iunlock(ip, lock_flags);
1133 return code;
1134 }
1135
1136 STATIC int
1137 xfs_ioc_fssetxattr(
1138 xfs_inode_t *ip,
1139 struct file *filp,
1140 void __user *arg)
1141 {
1142 struct fsxattr fa;
1143 unsigned int mask;
1144
1145 if (copy_from_user(&fa, arg, sizeof(fa)))
1146 return -EFAULT;
1147
1148 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1149 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1150 mask |= FSX_NONBLOCK;
1151
1152 return -xfs_ioctl_setattr(ip, &fa, mask);
1153 }
1154
1155 STATIC int
1156 xfs_ioc_getxflags(
1157 xfs_inode_t *ip,
1158 void __user *arg)
1159 {
1160 unsigned int flags;
1161
1162 flags = xfs_di2lxflags(ip->i_d.di_flags);
1163 if (copy_to_user(arg, &flags, sizeof(flags)))
1164 return -EFAULT;
1165 return 0;
1166 }
1167
1168 STATIC int
1169 xfs_ioc_setxflags(
1170 xfs_inode_t *ip,
1171 struct file *filp,
1172 void __user *arg)
1173 {
1174 struct fsxattr fa;
1175 unsigned int flags;
1176 unsigned int mask;
1177
1178 if (copy_from_user(&flags, arg, sizeof(flags)))
1179 return -EFAULT;
1180
1181 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1182 FS_NOATIME_FL | FS_NODUMP_FL | \
1183 FS_SYNC_FL))
1184 return -EOPNOTSUPP;
1185
1186 mask = FSX_XFLAGS;
1187 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1188 mask |= FSX_NONBLOCK;
1189 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1190
1191 return -xfs_ioctl_setattr(ip, &fa, mask);
1192 }
1193
1194 STATIC int
1195 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1196 {
1197 struct getbmap __user *base = *ap;
1198
1199 /* copy only getbmap portion (not getbmapx) */
1200 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1201 return XFS_ERROR(EFAULT);
1202
1203 *ap += sizeof(struct getbmap);
1204 return 0;
1205 }
1206
1207 STATIC int
1208 xfs_ioc_getbmap(
1209 struct xfs_inode *ip,
1210 int ioflags,
1211 unsigned int cmd,
1212 void __user *arg)
1213 {
1214 struct getbmapx bmx;
1215 int error;
1216
1217 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1218 return -XFS_ERROR(EFAULT);
1219
1220 if (bmx.bmv_count < 2)
1221 return -XFS_ERROR(EINVAL);
1222
1223 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1224 if (ioflags & IO_INVIS)
1225 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1226
1227 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1228 (struct getbmap *)arg+1);
1229 if (error)
1230 return -error;
1231
1232 /* copy back header - only size of getbmap */
1233 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1234 return -XFS_ERROR(EFAULT);
1235 return 0;
1236 }
1237
1238 STATIC int
1239 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1240 {
1241 struct getbmapx __user *base = *ap;
1242
1243 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1244 return XFS_ERROR(EFAULT);
1245
1246 *ap += sizeof(struct getbmapx);
1247 return 0;
1248 }
1249
1250 STATIC int
1251 xfs_ioc_getbmapx(
1252 struct xfs_inode *ip,
1253 void __user *arg)
1254 {
1255 struct getbmapx bmx;
1256 int error;
1257
1258 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1259 return -XFS_ERROR(EFAULT);
1260
1261 if (bmx.bmv_count < 2)
1262 return -XFS_ERROR(EINVAL);
1263
1264 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1265 return -XFS_ERROR(EINVAL);
1266
1267 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1268 (struct getbmapx *)arg+1);
1269 if (error)
1270 return -error;
1271
1272 /* copy back header */
1273 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1274 return -XFS_ERROR(EFAULT);
1275
1276 return 0;
1277 }
1278
1279 /*
1280 * Note: some of the ioctl's return positive numbers as a
1281 * byte count indicating success, such as readlink_by_handle.
1282 * So we don't "sign flip" like most other routines. This means
1283 * true errors need to be returned as a negative value.
1284 */
1285 long
1286 xfs_file_ioctl(
1287 struct file *filp,
1288 unsigned int cmd,
1289 unsigned long p)
1290 {
1291 struct inode *inode = filp->f_path.dentry->d_inode;
1292 struct xfs_inode *ip = XFS_I(inode);
1293 struct xfs_mount *mp = ip->i_mount;
1294 void __user *arg = (void __user *)p;
1295 int ioflags = 0;
1296 int error;
1297
1298 if (filp->f_mode & FMODE_NOCMTIME)
1299 ioflags |= IO_INVIS;
1300
1301 xfs_itrace_entry(ip);
1302
1303 switch (cmd) {
1304 case XFS_IOC_ALLOCSP:
1305 case XFS_IOC_FREESP:
1306 case XFS_IOC_RESVSP:
1307 case XFS_IOC_UNRESVSP:
1308 case XFS_IOC_ALLOCSP64:
1309 case XFS_IOC_FREESP64:
1310 case XFS_IOC_RESVSP64:
1311 case XFS_IOC_UNRESVSP64: {
1312 xfs_flock64_t bf;
1313
1314 if (copy_from_user(&bf, arg, sizeof(bf)))
1315 return -XFS_ERROR(EFAULT);
1316 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1317 }
1318 case XFS_IOC_DIOINFO: {
1319 struct dioattr da;
1320 xfs_buftarg_t *target =
1321 XFS_IS_REALTIME_INODE(ip) ?
1322 mp->m_rtdev_targp : mp->m_ddev_targp;
1323
1324 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1325 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1326
1327 if (copy_to_user(arg, &da, sizeof(da)))
1328 return -XFS_ERROR(EFAULT);
1329 return 0;
1330 }
1331
1332 case XFS_IOC_FSBULKSTAT_SINGLE:
1333 case XFS_IOC_FSBULKSTAT:
1334 case XFS_IOC_FSINUMBERS:
1335 return xfs_ioc_bulkstat(mp, cmd, arg);
1336
1337 case XFS_IOC_FSGEOMETRY_V1:
1338 return xfs_ioc_fsgeometry_v1(mp, arg);
1339
1340 case XFS_IOC_FSGEOMETRY:
1341 return xfs_ioc_fsgeometry(mp, arg);
1342
1343 case XFS_IOC_GETVERSION:
1344 return put_user(inode->i_generation, (int __user *)arg);
1345
1346 case XFS_IOC_FSGETXATTR:
1347 return xfs_ioc_fsgetxattr(ip, 0, arg);
1348 case XFS_IOC_FSGETXATTRA:
1349 return xfs_ioc_fsgetxattr(ip, 1, arg);
1350 case XFS_IOC_FSSETXATTR:
1351 return xfs_ioc_fssetxattr(ip, filp, arg);
1352 case XFS_IOC_GETXFLAGS:
1353 return xfs_ioc_getxflags(ip, arg);
1354 case XFS_IOC_SETXFLAGS:
1355 return xfs_ioc_setxflags(ip, filp, arg);
1356
1357 case XFS_IOC_FSSETDM: {
1358 struct fsdmidata dmi;
1359
1360 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1361 return -XFS_ERROR(EFAULT);
1362
1363 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1364 dmi.fsd_dmstate);
1365 return -error;
1366 }
1367
1368 case XFS_IOC_GETBMAP:
1369 case XFS_IOC_GETBMAPA:
1370 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1371
1372 case XFS_IOC_GETBMAPX:
1373 return xfs_ioc_getbmapx(ip, arg);
1374
1375 case XFS_IOC_FD_TO_HANDLE:
1376 case XFS_IOC_PATH_TO_HANDLE:
1377 case XFS_IOC_PATH_TO_FSHANDLE: {
1378 xfs_fsop_handlereq_t hreq;
1379
1380 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1381 return -XFS_ERROR(EFAULT);
1382 return xfs_find_handle(cmd, &hreq);
1383 }
1384 case XFS_IOC_OPEN_BY_HANDLE: {
1385 xfs_fsop_handlereq_t hreq;
1386
1387 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1388 return -XFS_ERROR(EFAULT);
1389 return xfs_open_by_handle(filp, &hreq);
1390 }
1391 case XFS_IOC_FSSETDM_BY_HANDLE:
1392 return xfs_fssetdm_by_handle(filp, arg);
1393
1394 case XFS_IOC_READLINK_BY_HANDLE: {
1395 xfs_fsop_handlereq_t hreq;
1396
1397 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1398 return -XFS_ERROR(EFAULT);
1399 return xfs_readlink_by_handle(filp, &hreq);
1400 }
1401 case XFS_IOC_ATTRLIST_BY_HANDLE:
1402 return xfs_attrlist_by_handle(filp, arg);
1403
1404 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1405 return xfs_attrmulti_by_handle(filp, arg);
1406
1407 case XFS_IOC_SWAPEXT: {
1408 struct xfs_swapext sxp;
1409
1410 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1411 return -XFS_ERROR(EFAULT);
1412 error = xfs_swapext(&sxp);
1413 return -error;
1414 }
1415
1416 case XFS_IOC_FSCOUNTS: {
1417 xfs_fsop_counts_t out;
1418
1419 error = xfs_fs_counts(mp, &out);
1420 if (error)
1421 return -error;
1422
1423 if (copy_to_user(arg, &out, sizeof(out)))
1424 return -XFS_ERROR(EFAULT);
1425 return 0;
1426 }
1427
1428 case XFS_IOC_SET_RESBLKS: {
1429 xfs_fsop_resblks_t inout;
1430 __uint64_t in;
1431
1432 if (!capable(CAP_SYS_ADMIN))
1433 return -EPERM;
1434
1435 if (mp->m_flags & XFS_MOUNT_RDONLY)
1436 return -XFS_ERROR(EROFS);
1437
1438 if (copy_from_user(&inout, arg, sizeof(inout)))
1439 return -XFS_ERROR(EFAULT);
1440
1441 /* input parameter is passed in resblks field of structure */
1442 in = inout.resblks;
1443 error = xfs_reserve_blocks(mp, &in, &inout);
1444 if (error)
1445 return -error;
1446
1447 if (copy_to_user(arg, &inout, sizeof(inout)))
1448 return -XFS_ERROR(EFAULT);
1449 return 0;
1450 }
1451
1452 case XFS_IOC_GET_RESBLKS: {
1453 xfs_fsop_resblks_t out;
1454
1455 if (!capable(CAP_SYS_ADMIN))
1456 return -EPERM;
1457
1458 error = xfs_reserve_blocks(mp, NULL, &out);
1459 if (error)
1460 return -error;
1461
1462 if (copy_to_user(arg, &out, sizeof(out)))
1463 return -XFS_ERROR(EFAULT);
1464
1465 return 0;
1466 }
1467
1468 case XFS_IOC_FSGROWFSDATA: {
1469 xfs_growfs_data_t in;
1470
1471 if (copy_from_user(&in, arg, sizeof(in)))
1472 return -XFS_ERROR(EFAULT);
1473
1474 error = xfs_growfs_data(mp, &in);
1475 return -error;
1476 }
1477
1478 case XFS_IOC_FSGROWFSLOG: {
1479 xfs_growfs_log_t in;
1480
1481 if (copy_from_user(&in, arg, sizeof(in)))
1482 return -XFS_ERROR(EFAULT);
1483
1484 error = xfs_growfs_log(mp, &in);
1485 return -error;
1486 }
1487
1488 case XFS_IOC_FSGROWFSRT: {
1489 xfs_growfs_rt_t in;
1490
1491 if (copy_from_user(&in, arg, sizeof(in)))
1492 return -XFS_ERROR(EFAULT);
1493
1494 error = xfs_growfs_rt(mp, &in);
1495 return -error;
1496 }
1497
1498 case XFS_IOC_GOINGDOWN: {
1499 __uint32_t in;
1500
1501 if (!capable(CAP_SYS_ADMIN))
1502 return -EPERM;
1503
1504 if (get_user(in, (__uint32_t __user *)arg))
1505 return -XFS_ERROR(EFAULT);
1506
1507 error = xfs_fs_goingdown(mp, in);
1508 return -error;
1509 }
1510
1511 case XFS_IOC_ERROR_INJECTION: {
1512 xfs_error_injection_t in;
1513
1514 if (!capable(CAP_SYS_ADMIN))
1515 return -EPERM;
1516
1517 if (copy_from_user(&in, arg, sizeof(in)))
1518 return -XFS_ERROR(EFAULT);
1519
1520 error = xfs_errortag_add(in.errtag, mp);
1521 return -error;
1522 }
1523
1524 case XFS_IOC_ERROR_CLEARALL:
1525 if (!capable(CAP_SYS_ADMIN))
1526 return -EPERM;
1527
1528 error = xfs_errortag_clearall(mp, 1);
1529 return -error;
1530
1531 default:
1532 return -ENOTTY;
1533 }
1534 }
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