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eCryptfs: Remove mmap from directory operations
[linux/fpc-iii.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
bloba034cf62443702283af914a073239a1ee530a8da
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/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 = memdup_user(ubuf, len);
493 if (IS_ERR(kbuf))
494 return PTR_ERR(kbuf);
495
496 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
497
498 return error;
499 }
500
501 int
502 xfs_attrmulti_attr_remove(
503 struct inode *inode,
504 char *name,
505 __uint32_t flags)
506 {
507 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
508 return EPERM;
509 return xfs_attr_remove(XFS_I(inode), name, flags);
510 }
511
512 STATIC int
513 xfs_attrmulti_by_handle(
514 struct file *parfilp,
515 void __user *arg)
516 {
517 int error;
518 xfs_attr_multiop_t *ops;
519 xfs_fsop_attrmulti_handlereq_t am_hreq;
520 struct dentry *dentry;
521 unsigned int i, size;
522 char *attr_name;
523
524 if (!capable(CAP_SYS_ADMIN))
525 return -XFS_ERROR(EPERM);
526 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
527 return -XFS_ERROR(EFAULT);
528
529 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
530 if (IS_ERR(dentry))
531 return PTR_ERR(dentry);
532
533 error = E2BIG;
534 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
535 if (!size || size > 16 * PAGE_SIZE)
536 goto out_dput;
537
538 ops = memdup_user(am_hreq.ops, size);
539 if (IS_ERR(ops)) {
540 error = PTR_ERR(ops);
541 goto out_dput;
542 }
543
544 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
545 if (!attr_name)
546 goto out_kfree_ops;
547
548 error = 0;
549 for (i = 0; i < am_hreq.opcount; i++) {
550 ops[i].am_error = strncpy_from_user(attr_name,
551 ops[i].am_attrname, MAXNAMELEN);
552 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
553 error = -ERANGE;
554 if (ops[i].am_error < 0)
555 break;
556
557 switch (ops[i].am_opcode) {
558 case ATTR_OP_GET:
559 ops[i].am_error = xfs_attrmulti_attr_get(
560 dentry->d_inode, attr_name,
561 ops[i].am_attrvalue, &ops[i].am_length,
562 ops[i].am_flags);
563 break;
564 case ATTR_OP_SET:
565 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
566 if (ops[i].am_error)
567 break;
568 ops[i].am_error = xfs_attrmulti_attr_set(
569 dentry->d_inode, attr_name,
570 ops[i].am_attrvalue, ops[i].am_length,
571 ops[i].am_flags);
572 mnt_drop_write(parfilp->f_path.mnt);
573 break;
574 case ATTR_OP_REMOVE:
575 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
576 if (ops[i].am_error)
577 break;
578 ops[i].am_error = xfs_attrmulti_attr_remove(
579 dentry->d_inode, attr_name,
580 ops[i].am_flags);
581 mnt_drop_write(parfilp->f_path.mnt);
582 break;
583 default:
584 ops[i].am_error = EINVAL;
585 }
586 }
587
588 if (copy_to_user(am_hreq.ops, ops, size))
589 error = XFS_ERROR(EFAULT);
590
591 kfree(attr_name);
592 out_kfree_ops:
593 kfree(ops);
594 out_dput:
595 dput(dentry);
596 return -error;
597 }
598
599 int
600 xfs_ioc_space(
601 struct xfs_inode *ip,
602 struct inode *inode,
603 struct file *filp,
604 int ioflags,
605 unsigned int cmd,
606 xfs_flock64_t *bf)
607 {
608 int attr_flags = 0;
609 int error;
610
611 /*
612 * Only allow the sys admin to reserve space unless
613 * unwritten extents are enabled.
614 */
615 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
616 !capable(CAP_SYS_ADMIN))
617 return -XFS_ERROR(EPERM);
618
619 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
620 return -XFS_ERROR(EPERM);
621
622 if (!(filp->f_mode & FMODE_WRITE))
623 return -XFS_ERROR(EBADF);
624
625 if (!S_ISREG(inode->i_mode))
626 return -XFS_ERROR(EINVAL);
627
628 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
629 attr_flags |= XFS_ATTR_NONBLOCK;
630 if (ioflags & IO_INVIS)
631 attr_flags |= XFS_ATTR_DMI;
632
633 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
634 return -error;
635 }
636
637 STATIC int
638 xfs_ioc_bulkstat(
639 xfs_mount_t *mp,
640 unsigned int cmd,
641 void __user *arg)
642 {
643 xfs_fsop_bulkreq_t bulkreq;
644 int count; /* # of records returned */
645 xfs_ino_t inlast; /* last inode number */
646 int done;
647 int error;
648
649 /* done = 1 if there are more stats to get and if bulkstat */
650 /* should be called again (unused here, but used in dmapi) */
651
652 if (!capable(CAP_SYS_ADMIN))
653 return -EPERM;
654
655 if (XFS_FORCED_SHUTDOWN(mp))
656 return -XFS_ERROR(EIO);
657
658 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
659 return -XFS_ERROR(EFAULT);
660
661 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
662 return -XFS_ERROR(EFAULT);
663
664 if ((count = bulkreq.icount) <= 0)
665 return -XFS_ERROR(EINVAL);
666
667 if (bulkreq.ubuffer == NULL)
668 return -XFS_ERROR(EINVAL);
669
670 if (cmd == XFS_IOC_FSINUMBERS)
671 error = xfs_inumbers(mp, &inlast, &count,
672 bulkreq.ubuffer, xfs_inumbers_fmt);
673 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
674 error = xfs_bulkstat_single(mp, &inlast,
675 bulkreq.ubuffer, &done);
676 else /* XFS_IOC_FSBULKSTAT */
677 error = xfs_bulkstat(mp, &inlast, &count,
678 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
679 sizeof(xfs_bstat_t), bulkreq.ubuffer,
680 BULKSTAT_FG_QUICK, &done);
681
682 if (error)
683 return -error;
684
685 if (bulkreq.ocount != NULL) {
686 if (copy_to_user(bulkreq.lastip, &inlast,
687 sizeof(xfs_ino_t)))
688 return -XFS_ERROR(EFAULT);
689
690 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
691 return -XFS_ERROR(EFAULT);
692 }
693
694 return 0;
695 }
696
697 STATIC int
698 xfs_ioc_fsgeometry_v1(
699 xfs_mount_t *mp,
700 void __user *arg)
701 {
702 xfs_fsop_geom_v1_t fsgeo;
703 int error;
704
705 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
706 if (error)
707 return -error;
708
709 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
710 return -XFS_ERROR(EFAULT);
711 return 0;
712 }
713
714 STATIC int
715 xfs_ioc_fsgeometry(
716 xfs_mount_t *mp,
717 void __user *arg)
718 {
719 xfs_fsop_geom_t fsgeo;
720 int error;
721
722 error = xfs_fs_geometry(mp, &fsgeo, 4);
723 if (error)
724 return -error;
725
726 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
727 return -XFS_ERROR(EFAULT);
728 return 0;
729 }
730
731 /*
732 * Linux extended inode flags interface.
733 */
734
735 STATIC unsigned int
736 xfs_merge_ioc_xflags(
737 unsigned int flags,
738 unsigned int start)
739 {
740 unsigned int xflags = start;
741
742 if (flags & FS_IMMUTABLE_FL)
743 xflags |= XFS_XFLAG_IMMUTABLE;
744 else
745 xflags &= ~XFS_XFLAG_IMMUTABLE;
746 if (flags & FS_APPEND_FL)
747 xflags |= XFS_XFLAG_APPEND;
748 else
749 xflags &= ~XFS_XFLAG_APPEND;
750 if (flags & FS_SYNC_FL)
751 xflags |= XFS_XFLAG_SYNC;
752 else
753 xflags &= ~XFS_XFLAG_SYNC;
754 if (flags & FS_NOATIME_FL)
755 xflags |= XFS_XFLAG_NOATIME;
756 else
757 xflags &= ~XFS_XFLAG_NOATIME;
758 if (flags & FS_NODUMP_FL)
759 xflags |= XFS_XFLAG_NODUMP;
760 else
761 xflags &= ~XFS_XFLAG_NODUMP;
762
763 return xflags;
764 }
765
766 STATIC unsigned int
767 xfs_di2lxflags(
768 __uint16_t di_flags)
769 {
770 unsigned int flags = 0;
771
772 if (di_flags & XFS_DIFLAG_IMMUTABLE)
773 flags |= FS_IMMUTABLE_FL;
774 if (di_flags & XFS_DIFLAG_APPEND)
775 flags |= FS_APPEND_FL;
776 if (di_flags & XFS_DIFLAG_SYNC)
777 flags |= FS_SYNC_FL;
778 if (di_flags & XFS_DIFLAG_NOATIME)
779 flags |= FS_NOATIME_FL;
780 if (di_flags & XFS_DIFLAG_NODUMP)
781 flags |= FS_NODUMP_FL;
782 return flags;
783 }
784
785 STATIC int
786 xfs_ioc_fsgetxattr(
787 xfs_inode_t *ip,
788 int attr,
789 void __user *arg)
790 {
791 struct fsxattr fa;
792
793 xfs_ilock(ip, XFS_ILOCK_SHARED);
794 fa.fsx_xflags = xfs_ip2xflags(ip);
795 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
796 fa.fsx_projid = ip->i_d.di_projid;
797
798 if (attr) {
799 if (ip->i_afp) {
800 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
801 fa.fsx_nextents = ip->i_afp->if_bytes /
802 sizeof(xfs_bmbt_rec_t);
803 else
804 fa.fsx_nextents = ip->i_d.di_anextents;
805 } else
806 fa.fsx_nextents = 0;
807 } else {
808 if (ip->i_df.if_flags & XFS_IFEXTENTS)
809 fa.fsx_nextents = ip->i_df.if_bytes /
810 sizeof(xfs_bmbt_rec_t);
811 else
812 fa.fsx_nextents = ip->i_d.di_nextents;
813 }
814 xfs_iunlock(ip, XFS_ILOCK_SHARED);
815
816 if (copy_to_user(arg, &fa, sizeof(fa)))
817 return -EFAULT;
818 return 0;
819 }
820
821 STATIC void
822 xfs_set_diflags(
823 struct xfs_inode *ip,
824 unsigned int xflags)
825 {
826 unsigned int di_flags;
827
828 /* can't set PREALLOC this way, just preserve it */
829 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
830 if (xflags & XFS_XFLAG_IMMUTABLE)
831 di_flags |= XFS_DIFLAG_IMMUTABLE;
832 if (xflags & XFS_XFLAG_APPEND)
833 di_flags |= XFS_DIFLAG_APPEND;
834 if (xflags & XFS_XFLAG_SYNC)
835 di_flags |= XFS_DIFLAG_SYNC;
836 if (xflags & XFS_XFLAG_NOATIME)
837 di_flags |= XFS_DIFLAG_NOATIME;
838 if (xflags & XFS_XFLAG_NODUMP)
839 di_flags |= XFS_DIFLAG_NODUMP;
840 if (xflags & XFS_XFLAG_PROJINHERIT)
841 di_flags |= XFS_DIFLAG_PROJINHERIT;
842 if (xflags & XFS_XFLAG_NODEFRAG)
843 di_flags |= XFS_DIFLAG_NODEFRAG;
844 if (xflags & XFS_XFLAG_FILESTREAM)
845 di_flags |= XFS_DIFLAG_FILESTREAM;
846 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
847 if (xflags & XFS_XFLAG_RTINHERIT)
848 di_flags |= XFS_DIFLAG_RTINHERIT;
849 if (xflags & XFS_XFLAG_NOSYMLINKS)
850 di_flags |= XFS_DIFLAG_NOSYMLINKS;
851 if (xflags & XFS_XFLAG_EXTSZINHERIT)
852 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
853 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
854 if (xflags & XFS_XFLAG_REALTIME)
855 di_flags |= XFS_DIFLAG_REALTIME;
856 if (xflags & XFS_XFLAG_EXTSIZE)
857 di_flags |= XFS_DIFLAG_EXTSIZE;
858 }
859
860 ip->i_d.di_flags = di_flags;
861 }
862
863 STATIC void
864 xfs_diflags_to_linux(
865 struct xfs_inode *ip)
866 {
867 struct inode *inode = VFS_I(ip);
868 unsigned int xflags = xfs_ip2xflags(ip);
869
870 if (xflags & XFS_XFLAG_IMMUTABLE)
871 inode->i_flags |= S_IMMUTABLE;
872 else
873 inode->i_flags &= ~S_IMMUTABLE;
874 if (xflags & XFS_XFLAG_APPEND)
875 inode->i_flags |= S_APPEND;
876 else
877 inode->i_flags &= ~S_APPEND;
878 if (xflags & XFS_XFLAG_SYNC)
879 inode->i_flags |= S_SYNC;
880 else
881 inode->i_flags &= ~S_SYNC;
882 if (xflags & XFS_XFLAG_NOATIME)
883 inode->i_flags |= S_NOATIME;
884 else
885 inode->i_flags &= ~S_NOATIME;
886 }
887
888 #define FSX_PROJID 1
889 #define FSX_EXTSIZE 2
890 #define FSX_XFLAGS 4
891 #define FSX_NONBLOCK 8
892
893 STATIC int
894 xfs_ioctl_setattr(
895 xfs_inode_t *ip,
896 struct fsxattr *fa,
897 int mask)
898 {
899 struct xfs_mount *mp = ip->i_mount;
900 struct xfs_trans *tp;
901 unsigned int lock_flags = 0;
902 struct xfs_dquot *udqp = NULL;
903 struct xfs_dquot *gdqp = NULL;
904 struct xfs_dquot *olddquot = NULL;
905 int code;
906
907 xfs_itrace_entry(ip);
908
909 if (mp->m_flags & XFS_MOUNT_RDONLY)
910 return XFS_ERROR(EROFS);
911 if (XFS_FORCED_SHUTDOWN(mp))
912 return XFS_ERROR(EIO);
913
914 /*
915 * If disk quotas is on, we make sure that the dquots do exist on disk,
916 * before we start any other transactions. Trying to do this later
917 * is messy. We don't care to take a readlock to look at the ids
918 * in inode here, because we can't hold it across the trans_reserve.
919 * If the IDs do change before we take the ilock, we're covered
920 * because the i_*dquot fields will get updated anyway.
921 */
922 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
923 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
924 ip->i_d.di_gid, fa->fsx_projid,
925 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
926 if (code)
927 return code;
928 }
929
930 /*
931 * For the other attributes, we acquire the inode lock and
932 * first do an error checking pass.
933 */
934 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
935 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
936 if (code)
937 goto error_return;
938
939 lock_flags = XFS_ILOCK_EXCL;
940 xfs_ilock(ip, lock_flags);
941
942 /*
943 * CAP_FOWNER overrides the following restrictions:
944 *
945 * The user ID of the calling process must be equal
946 * to the file owner ID, except in cases where the
947 * CAP_FSETID capability is applicable.
948 */
949 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
950 code = XFS_ERROR(EPERM);
951 goto error_return;
952 }
953
954 /*
955 * Do a quota reservation only if projid is actually going to change.
956 */
957 if (mask & FSX_PROJID) {
958 if (XFS_IS_QUOTA_RUNNING(mp) &&
959 XFS_IS_PQUOTA_ON(mp) &&
960 ip->i_d.di_projid != fa->fsx_projid) {
961 ASSERT(tp);
962 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
963 capable(CAP_FOWNER) ?
964 XFS_QMOPT_FORCE_RES : 0);
965 if (code) /* out of quota */
966 goto error_return;
967 }
968 }
969
970 if (mask & FSX_EXTSIZE) {
971 /*
972 * Can't change extent size if any extents are allocated.
973 */
974 if (ip->i_d.di_nextents &&
975 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
976 fa->fsx_extsize)) {
977 code = XFS_ERROR(EINVAL); /* EFBIG? */
978 goto error_return;
979 }
980
981 /*
982 * Extent size must be a multiple of the appropriate block
983 * size, if set at all.
984 */
985 if (fa->fsx_extsize != 0) {
986 xfs_extlen_t size;
987
988 if (XFS_IS_REALTIME_INODE(ip) ||
989 ((mask & FSX_XFLAGS) &&
990 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
991 size = mp->m_sb.sb_rextsize <<
992 mp->m_sb.sb_blocklog;
993 } else {
994 size = mp->m_sb.sb_blocksize;
995 }
996
997 if (fa->fsx_extsize % size) {
998 code = XFS_ERROR(EINVAL);
999 goto error_return;
1000 }
1001 }
1002 }
1003
1004
1005 if (mask & FSX_XFLAGS) {
1006 /*
1007 * Can't change realtime flag if any extents are allocated.
1008 */
1009 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1010 (XFS_IS_REALTIME_INODE(ip)) !=
1011 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1012 code = XFS_ERROR(EINVAL); /* EFBIG? */
1013 goto error_return;
1014 }
1015
1016 /*
1017 * If realtime flag is set then must have realtime data.
1018 */
1019 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1020 if ((mp->m_sb.sb_rblocks == 0) ||
1021 (mp->m_sb.sb_rextsize == 0) ||
1022 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1023 code = XFS_ERROR(EINVAL);
1024 goto error_return;
1025 }
1026 }
1027
1028 /*
1029 * Can't modify an immutable/append-only file unless
1030 * we have appropriate permission.
1031 */
1032 if ((ip->i_d.di_flags &
1033 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1034 (fa->fsx_xflags &
1035 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1036 !capable(CAP_LINUX_IMMUTABLE)) {
1037 code = XFS_ERROR(EPERM);
1038 goto error_return;
1039 }
1040 }
1041
1042 xfs_trans_ijoin(tp, ip, lock_flags);
1043 xfs_trans_ihold(tp, ip);
1044
1045 /*
1046 * Change file ownership. Must be the owner or privileged.
1047 */
1048 if (mask & FSX_PROJID) {
1049 /*
1050 * CAP_FSETID overrides the following restrictions:
1051 *
1052 * The set-user-ID and set-group-ID bits of a file will be
1053 * cleared upon successful return from chown()
1054 */
1055 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1056 !capable(CAP_FSETID))
1057 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1058
1059 /*
1060 * Change the ownerships and register quota modifications
1061 * in the transaction.
1062 */
1063 if (ip->i_d.di_projid != fa->fsx_projid) {
1064 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1065 olddquot = xfs_qm_vop_chown(tp, ip,
1066 &ip->i_gdquot, gdqp);
1067 }
1068 ip->i_d.di_projid = fa->fsx_projid;
1069
1070 /*
1071 * We may have to rev the inode as well as
1072 * the superblock version number since projids didn't
1073 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1074 */
1075 if (ip->i_d.di_version == 1)
1076 xfs_bump_ino_vers2(tp, ip);
1077 }
1078
1079 }
1080
1081 if (mask & FSX_EXTSIZE)
1082 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1083 if (mask & FSX_XFLAGS) {
1084 xfs_set_diflags(ip, fa->fsx_xflags);
1085 xfs_diflags_to_linux(ip);
1086 }
1087
1088 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1089 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1090
1091 XFS_STATS_INC(xs_ig_attrchg);
1092
1093 /*
1094 * If this is a synchronous mount, make sure that the
1095 * transaction goes to disk before returning to the user.
1096 * This is slightly sub-optimal in that truncates require
1097 * two sync transactions instead of one for wsync filesystems.
1098 * One for the truncate and one for the timestamps since we
1099 * don't want to change the timestamps unless we're sure the
1100 * truncate worked. Truncates are less than 1% of the laddis
1101 * mix so this probably isn't worth the trouble to optimize.
1102 */
1103 if (mp->m_flags & XFS_MOUNT_WSYNC)
1104 xfs_trans_set_sync(tp);
1105 code = xfs_trans_commit(tp, 0);
1106 xfs_iunlock(ip, lock_flags);
1107
1108 /*
1109 * Release any dquot(s) the inode had kept before chown.
1110 */
1111 xfs_qm_dqrele(olddquot);
1112 xfs_qm_dqrele(udqp);
1113 xfs_qm_dqrele(gdqp);
1114
1115 if (code)
1116 return code;
1117
1118 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1119 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1120 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1121 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1122 }
1123
1124 return 0;
1125
1126 error_return:
1127 xfs_qm_dqrele(udqp);
1128 xfs_qm_dqrele(gdqp);
1129 xfs_trans_cancel(tp, 0);
1130 if (lock_flags)
1131 xfs_iunlock(ip, lock_flags);
1132 return code;
1133 }
1134
1135 STATIC int
1136 xfs_ioc_fssetxattr(
1137 xfs_inode_t *ip,
1138 struct file *filp,
1139 void __user *arg)
1140 {
1141 struct fsxattr fa;
1142 unsigned int mask;
1143
1144 if (copy_from_user(&fa, arg, sizeof(fa)))
1145 return -EFAULT;
1146
1147 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1148 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1149 mask |= FSX_NONBLOCK;
1150
1151 return -xfs_ioctl_setattr(ip, &fa, mask);
1152 }
1153
1154 STATIC int
1155 xfs_ioc_getxflags(
1156 xfs_inode_t *ip,
1157 void __user *arg)
1158 {
1159 unsigned int flags;
1160
1161 flags = xfs_di2lxflags(ip->i_d.di_flags);
1162 if (copy_to_user(arg, &flags, sizeof(flags)))
1163 return -EFAULT;
1164 return 0;
1165 }
1166
1167 STATIC int
1168 xfs_ioc_setxflags(
1169 xfs_inode_t *ip,
1170 struct file *filp,
1171 void __user *arg)
1172 {
1173 struct fsxattr fa;
1174 unsigned int flags;
1175 unsigned int mask;
1176
1177 if (copy_from_user(&flags, arg, sizeof(flags)))
1178 return -EFAULT;
1179
1180 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1181 FS_NOATIME_FL | FS_NODUMP_FL | \
1182 FS_SYNC_FL))
1183 return -EOPNOTSUPP;
1184
1185 mask = FSX_XFLAGS;
1186 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1187 mask |= FSX_NONBLOCK;
1188 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1189
1190 return -xfs_ioctl_setattr(ip, &fa, mask);
1191 }
1192
1193 STATIC int
1194 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1195 {
1196 struct getbmap __user *base = *ap;
1197
1198 /* copy only getbmap portion (not getbmapx) */
1199 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1200 return XFS_ERROR(EFAULT);
1201
1202 *ap += sizeof(struct getbmap);
1203 return 0;
1204 }
1205
1206 STATIC int
1207 xfs_ioc_getbmap(
1208 struct xfs_inode *ip,
1209 int ioflags,
1210 unsigned int cmd,
1211 void __user *arg)
1212 {
1213 struct getbmapx bmx;
1214 int error;
1215
1216 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1217 return -XFS_ERROR(EFAULT);
1218
1219 if (bmx.bmv_count < 2)
1220 return -XFS_ERROR(EINVAL);
1221
1222 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1223 if (ioflags & IO_INVIS)
1224 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1225
1226 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1227 (struct getbmap *)arg+1);
1228 if (error)
1229 return -error;
1230
1231 /* copy back header - only size of getbmap */
1232 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1233 return -XFS_ERROR(EFAULT);
1234 return 0;
1235 }
1236
1237 STATIC int
1238 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1239 {
1240 struct getbmapx __user *base = *ap;
1241
1242 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1243 return XFS_ERROR(EFAULT);
1244
1245 *ap += sizeof(struct getbmapx);
1246 return 0;
1247 }
1248
1249 STATIC int
1250 xfs_ioc_getbmapx(
1251 struct xfs_inode *ip,
1252 void __user *arg)
1253 {
1254 struct getbmapx bmx;
1255 int error;
1256
1257 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1258 return -XFS_ERROR(EFAULT);
1259
1260 if (bmx.bmv_count < 2)
1261 return -XFS_ERROR(EINVAL);
1262
1263 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1264 return -XFS_ERROR(EINVAL);
1265
1266 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1267 (struct getbmapx *)arg+1);
1268 if (error)
1269 return -error;
1270
1271 /* copy back header */
1272 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1273 return -XFS_ERROR(EFAULT);
1274
1275 return 0;
1276 }
1277
1278 /*
1279 * Note: some of the ioctl's return positive numbers as a
1280 * byte count indicating success, such as readlink_by_handle.
1281 * So we don't "sign flip" like most other routines. This means
1282 * true errors need to be returned as a negative value.
1283 */
1284 long
1285 xfs_file_ioctl(
1286 struct file *filp,
1287 unsigned int cmd,
1288 unsigned long p)
1289 {
1290 struct inode *inode = filp->f_path.dentry->d_inode;
1291 struct xfs_inode *ip = XFS_I(inode);
1292 struct xfs_mount *mp = ip->i_mount;
1293 void __user *arg = (void __user *)p;
1294 int ioflags = 0;
1295 int error;
1296
1297 if (filp->f_mode & FMODE_NOCMTIME)
1298 ioflags |= IO_INVIS;
1299
1300 xfs_itrace_entry(ip);
1301
1302 switch (cmd) {
1303 case XFS_IOC_ALLOCSP:
1304 case XFS_IOC_FREESP:
1305 case XFS_IOC_RESVSP:
1306 case XFS_IOC_UNRESVSP:
1307 case XFS_IOC_ALLOCSP64:
1308 case XFS_IOC_FREESP64:
1309 case XFS_IOC_RESVSP64:
1310 case XFS_IOC_UNRESVSP64: {
1311 xfs_flock64_t bf;
1312
1313 if (copy_from_user(&bf, arg, sizeof(bf)))
1314 return -XFS_ERROR(EFAULT);
1315 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1316 }
1317 case XFS_IOC_DIOINFO: {
1318 struct dioattr da;
1319 xfs_buftarg_t *target =
1320 XFS_IS_REALTIME_INODE(ip) ?
1321 mp->m_rtdev_targp : mp->m_ddev_targp;
1322
1323 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1324 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1325
1326 if (copy_to_user(arg, &da, sizeof(da)))
1327 return -XFS_ERROR(EFAULT);
1328 return 0;
1329 }
1330
1331 case XFS_IOC_FSBULKSTAT_SINGLE:
1332 case XFS_IOC_FSBULKSTAT:
1333 case XFS_IOC_FSINUMBERS:
1334 return xfs_ioc_bulkstat(mp, cmd, arg);
1335
1336 case XFS_IOC_FSGEOMETRY_V1:
1337 return xfs_ioc_fsgeometry_v1(mp, arg);
1338
1339 case XFS_IOC_FSGEOMETRY:
1340 return xfs_ioc_fsgeometry(mp, arg);
1341
1342 case XFS_IOC_GETVERSION:
1343 return put_user(inode->i_generation, (int __user *)arg);
1344
1345 case XFS_IOC_FSGETXATTR:
1346 return xfs_ioc_fsgetxattr(ip, 0, arg);
1347 case XFS_IOC_FSGETXATTRA:
1348 return xfs_ioc_fsgetxattr(ip, 1, arg);
1349 case XFS_IOC_FSSETXATTR:
1350 return xfs_ioc_fssetxattr(ip, filp, arg);
1351 case XFS_IOC_GETXFLAGS:
1352 return xfs_ioc_getxflags(ip, arg);
1353 case XFS_IOC_SETXFLAGS:
1354 return xfs_ioc_setxflags(ip, filp, arg);
1355
1356 case XFS_IOC_FSSETDM: {
1357 struct fsdmidata dmi;
1358
1359 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1360 return -XFS_ERROR(EFAULT);
1361
1362 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1363 dmi.fsd_dmstate);
1364 return -error;
1365 }
1366
1367 case XFS_IOC_GETBMAP:
1368 case XFS_IOC_GETBMAPA:
1369 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1370
1371 case XFS_IOC_GETBMAPX:
1372 return xfs_ioc_getbmapx(ip, arg);
1373
1374 case XFS_IOC_FD_TO_HANDLE:
1375 case XFS_IOC_PATH_TO_HANDLE:
1376 case XFS_IOC_PATH_TO_FSHANDLE: {
1377 xfs_fsop_handlereq_t hreq;
1378
1379 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1380 return -XFS_ERROR(EFAULT);
1381 return xfs_find_handle(cmd, &hreq);
1382 }
1383 case XFS_IOC_OPEN_BY_HANDLE: {
1384 xfs_fsop_handlereq_t hreq;
1385
1386 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1387 return -XFS_ERROR(EFAULT);
1388 return xfs_open_by_handle(filp, &hreq);
1389 }
1390 case XFS_IOC_FSSETDM_BY_HANDLE:
1391 return xfs_fssetdm_by_handle(filp, arg);
1392
1393 case XFS_IOC_READLINK_BY_HANDLE: {
1394 xfs_fsop_handlereq_t hreq;
1395
1396 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1397 return -XFS_ERROR(EFAULT);
1398 return xfs_readlink_by_handle(filp, &hreq);
1399 }
1400 case XFS_IOC_ATTRLIST_BY_HANDLE:
1401 return xfs_attrlist_by_handle(filp, arg);
1402
1403 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1404 return xfs_attrmulti_by_handle(filp, arg);
1405
1406 case XFS_IOC_SWAPEXT: {
1407 struct xfs_swapext sxp;
1408
1409 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1410 return -XFS_ERROR(EFAULT);
1411 error = xfs_swapext(&sxp);
1412 return -error;
1413 }
1414
1415 case XFS_IOC_FSCOUNTS: {
1416 xfs_fsop_counts_t out;
1417
1418 error = xfs_fs_counts(mp, &out);
1419 if (error)
1420 return -error;
1421
1422 if (copy_to_user(arg, &out, sizeof(out)))
1423 return -XFS_ERROR(EFAULT);
1424 return 0;
1425 }
1426
1427 case XFS_IOC_SET_RESBLKS: {
1428 xfs_fsop_resblks_t inout;
1429 __uint64_t in;
1430
1431 if (!capable(CAP_SYS_ADMIN))
1432 return -EPERM;
1433
1434 if (copy_from_user(&inout, arg, sizeof(inout)))
1435 return -XFS_ERROR(EFAULT);
1436
1437 /* input parameter is passed in resblks field of structure */
1438 in = inout.resblks;
1439 error = xfs_reserve_blocks(mp, &in, &inout);
1440 if (error)
1441 return -error;
1442
1443 if (copy_to_user(arg, &inout, sizeof(inout)))
1444 return -XFS_ERROR(EFAULT);
1445 return 0;
1446 }
1447
1448 case XFS_IOC_GET_RESBLKS: {
1449 xfs_fsop_resblks_t out;
1450
1451 if (!capable(CAP_SYS_ADMIN))
1452 return -EPERM;
1453
1454 error = xfs_reserve_blocks(mp, NULL, &out);
1455 if (error)
1456 return -error;
1457
1458 if (copy_to_user(arg, &out, sizeof(out)))
1459 return -XFS_ERROR(EFAULT);
1460
1461 return 0;
1462 }
1463
1464 case XFS_IOC_FSGROWFSDATA: {
1465 xfs_growfs_data_t in;
1466
1467 if (copy_from_user(&in, arg, sizeof(in)))
1468 return -XFS_ERROR(EFAULT);
1469
1470 error = xfs_growfs_data(mp, &in);
1471 return -error;
1472 }
1473
1474 case XFS_IOC_FSGROWFSLOG: {
1475 xfs_growfs_log_t in;
1476
1477 if (copy_from_user(&in, arg, sizeof(in)))
1478 return -XFS_ERROR(EFAULT);
1479
1480 error = xfs_growfs_log(mp, &in);
1481 return -error;
1482 }
1483
1484 case XFS_IOC_FSGROWFSRT: {
1485 xfs_growfs_rt_t in;
1486
1487 if (copy_from_user(&in, arg, sizeof(in)))
1488 return -XFS_ERROR(EFAULT);
1489
1490 error = xfs_growfs_rt(mp, &in);
1491 return -error;
1492 }
1493
1494 case XFS_IOC_GOINGDOWN: {
1495 __uint32_t in;
1496
1497 if (!capable(CAP_SYS_ADMIN))
1498 return -EPERM;
1499
1500 if (get_user(in, (__uint32_t __user *)arg))
1501 return -XFS_ERROR(EFAULT);
1502
1503 error = xfs_fs_goingdown(mp, in);
1504 return -error;
1505 }
1506
1507 case XFS_IOC_ERROR_INJECTION: {
1508 xfs_error_injection_t in;
1509
1510 if (!capable(CAP_SYS_ADMIN))
1511 return -EPERM;
1512
1513 if (copy_from_user(&in, arg, sizeof(in)))
1514 return -XFS_ERROR(EFAULT);
1515
1516 error = xfs_errortag_add(in.errtag, mp);
1517 return -error;
1518 }
1519
1520 case XFS_IOC_ERROR_CLEARALL:
1521 if (!capable(CAP_SYS_ADMIN))
1522 return -EPERM;
1523
1524 error = xfs_errortag_clearall(mp, 1);
1525 return -error;
1526
1527 default:
1528 return -ENOTTY;
1529 }
1530 }
Linux with added FPC-III support