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ASoC: omap-abe-twl6040: Add device tree support
[deliverable/linux.git] / fs / xfs / 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_log.h"
21 #include "xfs_trans.h"
22 #include "xfs_sb.h"
23 #include "xfs_ag.h"
24 #include "xfs_alloc.h"
25 #include "xfs_mount.h"
26 #include "xfs_bmap_btree.h"
27 #include "xfs_dinode.h"
28 #include "xfs_inode.h"
29 #include "xfs_ioctl.h"
30 #include "xfs_rtalloc.h"
31 #include "xfs_itable.h"
32 #include "xfs_error.h"
33 #include "xfs_attr.h"
34 #include "xfs_bmap.h"
35 #include "xfs_buf_item.h"
36 #include "xfs_utils.h"
37 #include "xfs_dfrag.h"
38 #include "xfs_fsops.h"
39 #include "xfs_vnodeops.h"
40 #include "xfs_discard.h"
41 #include "xfs_quota.h"
42 #include "xfs_inode_item.h"
43 #include "xfs_export.h"
44 #include "xfs_trace.h"
45
46 #include <linux/capability.h>
47 #include <linux/dcache.h>
48 #include <linux/mount.h>
49 #include <linux/namei.h>
50 #include <linux/pagemap.h>
51 #include <linux/slab.h>
52 #include <linux/exportfs.h>
53
54 /*
55 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
56 * a file or fs handle.
57 *
58 * XFS_IOC_PATH_TO_FSHANDLE
59 * returns fs handle for a mount point or path within that mount point
60 * XFS_IOC_FD_TO_HANDLE
61 * returns full handle for a FD opened in user space
62 * XFS_IOC_PATH_TO_HANDLE
63 * returns full handle for a path
64 */
65 int
66 xfs_find_handle(
67 unsigned int cmd,
68 xfs_fsop_handlereq_t *hreq)
69 {
70 int hsize;
71 xfs_handle_t handle;
72 struct inode *inode;
73 struct file *file = NULL;
74 struct path path;
75 int error;
76 struct xfs_inode *ip;
77
78 if (cmd == XFS_IOC_FD_TO_HANDLE) {
79 file = fget(hreq->fd);
80 if (!file)
81 return -EBADF;
82 inode = file->f_path.dentry->d_inode;
83 } else {
84 error = user_lpath((const char __user *)hreq->path, &path);
85 if (error)
86 return error;
87 inode = path.dentry->d_inode;
88 }
89 ip = XFS_I(inode);
90
91 /*
92 * We can only generate handles for inodes residing on a XFS filesystem,
93 * and only for regular files, directories or symbolic links.
94 */
95 error = -EINVAL;
96 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
97 goto out_put;
98
99 error = -EBADF;
100 if (!S_ISREG(inode->i_mode) &&
101 !S_ISDIR(inode->i_mode) &&
102 !S_ISLNK(inode->i_mode))
103 goto out_put;
104
105
106 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
107
108 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
109 /*
110 * This handle only contains an fsid, zero the rest.
111 */
112 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
113 hsize = sizeof(xfs_fsid_t);
114 } else {
115 int lock_mode;
116
117 lock_mode = xfs_ilock_map_shared(ip);
118 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
119 sizeof(handle.ha_fid.fid_len);
120 handle.ha_fid.fid_pad = 0;
121 handle.ha_fid.fid_gen = ip->i_d.di_gen;
122 handle.ha_fid.fid_ino = ip->i_ino;
123 xfs_iunlock_map_shared(ip, lock_mode);
124
125 hsize = XFS_HSIZE(handle);
126 }
127
128 error = -EFAULT;
129 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
130 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
131 goto out_put;
132
133 error = 0;
134
135 out_put:
136 if (cmd == XFS_IOC_FD_TO_HANDLE)
137 fput(file);
138 else
139 path_put(&path);
140 return error;
141 }
142
143 /*
144 * No need to do permission checks on the various pathname components
145 * as the handle operations are privileged.
146 */
147 STATIC int
148 xfs_handle_acceptable(
149 void *context,
150 struct dentry *dentry)
151 {
152 return 1;
153 }
154
155 /*
156 * Convert userspace handle data into a dentry.
157 */
158 struct dentry *
159 xfs_handle_to_dentry(
160 struct file *parfilp,
161 void __user *uhandle,
162 u32 hlen)
163 {
164 xfs_handle_t handle;
165 struct xfs_fid64 fid;
166
167 /*
168 * Only allow handle opens under a directory.
169 */
170 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
171 return ERR_PTR(-ENOTDIR);
172
173 if (hlen != sizeof(xfs_handle_t))
174 return ERR_PTR(-EINVAL);
175 if (copy_from_user(&handle, uhandle, hlen))
176 return ERR_PTR(-EFAULT);
177 if (handle.ha_fid.fid_len !=
178 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
179 return ERR_PTR(-EINVAL);
180
181 memset(&fid, 0, sizeof(struct fid));
182 fid.ino = handle.ha_fid.fid_ino;
183 fid.gen = handle.ha_fid.fid_gen;
184
185 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
186 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
187 xfs_handle_acceptable, NULL);
188 }
189
190 STATIC struct dentry *
191 xfs_handlereq_to_dentry(
192 struct file *parfilp,
193 xfs_fsop_handlereq_t *hreq)
194 {
195 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
196 }
197
198 int
199 xfs_open_by_handle(
200 struct file *parfilp,
201 xfs_fsop_handlereq_t *hreq)
202 {
203 const struct cred *cred = current_cred();
204 int error;
205 int fd;
206 int permflag;
207 struct file *filp;
208 struct inode *inode;
209 struct dentry *dentry;
210 fmode_t fmode;
211 struct path path;
212
213 if (!capable(CAP_SYS_ADMIN))
214 return -XFS_ERROR(EPERM);
215
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 if (IS_ERR(dentry))
218 return PTR_ERR(dentry);
219 inode = dentry->d_inode;
220
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
223 error = -XFS_ERROR(EPERM);
224 goto out_dput;
225 }
226
227 #if BITS_PER_LONG != 32
228 hreq->oflags |= O_LARGEFILE;
229 #endif
230
231 permflag = hreq->oflags;
232 fmode = OPEN_FMODE(permflag);
233 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
234 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
235 error = -XFS_ERROR(EPERM);
236 goto out_dput;
237 }
238
239 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
240 error = -XFS_ERROR(EACCES);
241 goto out_dput;
242 }
243
244 /* Can't write directories. */
245 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
246 error = -XFS_ERROR(EISDIR);
247 goto out_dput;
248 }
249
250 fd = get_unused_fd();
251 if (fd < 0) {
252 error = fd;
253 goto out_dput;
254 }
255
256 path.mnt = parfilp->f_path.mnt;
257 path.dentry = dentry;
258 filp = dentry_open(&path, hreq->oflags, cred);
259 dput(dentry);
260 if (IS_ERR(filp)) {
261 put_unused_fd(fd);
262 return PTR_ERR(filp);
263 }
264
265 if (S_ISREG(inode->i_mode)) {
266 filp->f_flags |= O_NOATIME;
267 filp->f_mode |= FMODE_NOCMTIME;
268 }
269
270 fd_install(fd, filp);
271 return fd;
272
273 out_dput:
274 dput(dentry);
275 return error;
276 }
277
278 /*
279 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
280 * unused first argument.
281 */
282 STATIC int
283 do_readlink(
284 char __user *buffer,
285 int buflen,
286 const char *link)
287 {
288 int len;
289
290 len = PTR_ERR(link);
291 if (IS_ERR(link))
292 goto out;
293
294 len = strlen(link);
295 if (len > (unsigned) buflen)
296 len = buflen;
297 if (copy_to_user(buffer, link, len))
298 len = -EFAULT;
299 out:
300 return len;
301 }
302
303
304 int
305 xfs_readlink_by_handle(
306 struct file *parfilp,
307 xfs_fsop_handlereq_t *hreq)
308 {
309 struct dentry *dentry;
310 __u32 olen;
311 void *link;
312 int error;
313
314 if (!capable(CAP_SYS_ADMIN))
315 return -XFS_ERROR(EPERM);
316
317 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
318 if (IS_ERR(dentry))
319 return PTR_ERR(dentry);
320
321 /* Restrict this handle operation to symlinks only. */
322 if (!S_ISLNK(dentry->d_inode->i_mode)) {
323 error = -XFS_ERROR(EINVAL);
324 goto out_dput;
325 }
326
327 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
328 error = -XFS_ERROR(EFAULT);
329 goto out_dput;
330 }
331
332 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
333 if (!link) {
334 error = -XFS_ERROR(ENOMEM);
335 goto out_dput;
336 }
337
338 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
339 if (error)
340 goto out_kfree;
341 error = do_readlink(hreq->ohandle, olen, link);
342 if (error)
343 goto out_kfree;
344
345 out_kfree:
346 kfree(link);
347 out_dput:
348 dput(dentry);
349 return error;
350 }
351
352 STATIC int
353 xfs_fssetdm_by_handle(
354 struct file *parfilp,
355 void __user *arg)
356 {
357 int error;
358 struct fsdmidata fsd;
359 xfs_fsop_setdm_handlereq_t dmhreq;
360 struct dentry *dentry;
361
362 if (!capable(CAP_MKNOD))
363 return -XFS_ERROR(EPERM);
364 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
365 return -XFS_ERROR(EFAULT);
366
367 error = mnt_want_write_file(parfilp);
368 if (error)
369 return error;
370
371 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
372 if (IS_ERR(dentry)) {
373 mnt_drop_write_file(parfilp);
374 return PTR_ERR(dentry);
375 }
376
377 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
378 error = -XFS_ERROR(EPERM);
379 goto out;
380 }
381
382 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
383 error = -XFS_ERROR(EFAULT);
384 goto out;
385 }
386
387 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
388 fsd.fsd_dmstate);
389
390 out:
391 mnt_drop_write_file(parfilp);
392 dput(dentry);
393 return error;
394 }
395
396 STATIC int
397 xfs_attrlist_by_handle(
398 struct file *parfilp,
399 void __user *arg)
400 {
401 int error = -ENOMEM;
402 attrlist_cursor_kern_t *cursor;
403 xfs_fsop_attrlist_handlereq_t al_hreq;
404 struct dentry *dentry;
405 char *kbuf;
406
407 if (!capable(CAP_SYS_ADMIN))
408 return -XFS_ERROR(EPERM);
409 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
410 return -XFS_ERROR(EFAULT);
411 if (al_hreq.buflen > XATTR_LIST_MAX)
412 return -XFS_ERROR(EINVAL);
413
414 /*
415 * Reject flags, only allow namespaces.
416 */
417 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
418 return -XFS_ERROR(EINVAL);
419
420 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
421 if (IS_ERR(dentry))
422 return PTR_ERR(dentry);
423
424 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
425 if (!kbuf)
426 goto out_dput;
427
428 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
429 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
430 al_hreq.flags, cursor);
431 if (error)
432 goto out_kfree;
433
434 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
435 error = -EFAULT;
436
437 out_kfree:
438 kfree(kbuf);
439 out_dput:
440 dput(dentry);
441 return error;
442 }
443
444 int
445 xfs_attrmulti_attr_get(
446 struct inode *inode,
447 unsigned char *name,
448 unsigned char __user *ubuf,
449 __uint32_t *len,
450 __uint32_t flags)
451 {
452 unsigned char *kbuf;
453 int error = EFAULT;
454
455 if (*len > XATTR_SIZE_MAX)
456 return EINVAL;
457 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
458 if (!kbuf) {
459 kbuf = kmem_zalloc_large(*len);
460 if (!kbuf)
461 return ENOMEM;
462 }
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 if (is_vmalloc_addr(kbuf))
473 kmem_free_large(kbuf);
474 else
475 kmem_free(kbuf);
476 return error;
477 }
478
479 int
480 xfs_attrmulti_attr_set(
481 struct inode *inode,
482 unsigned char *name,
483 const unsigned char __user *ubuf,
484 __uint32_t len,
485 __uint32_t flags)
486 {
487 unsigned char *kbuf;
488 int error = EFAULT;
489
490 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
491 return EPERM;
492 if (len > XATTR_SIZE_MAX)
493 return EINVAL;
494
495 kbuf = memdup_user(ubuf, len);
496 if (IS_ERR(kbuf))
497 return PTR_ERR(kbuf);
498
499 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
500
501 return error;
502 }
503
504 int
505 xfs_attrmulti_attr_remove(
506 struct inode *inode,
507 unsigned char *name,
508 __uint32_t flags)
509 {
510 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
511 return EPERM;
512 return xfs_attr_remove(XFS_I(inode), name, flags);
513 }
514
515 STATIC int
516 xfs_attrmulti_by_handle(
517 struct file *parfilp,
518 void __user *arg)
519 {
520 int error;
521 xfs_attr_multiop_t *ops;
522 xfs_fsop_attrmulti_handlereq_t am_hreq;
523 struct dentry *dentry;
524 unsigned int i, size;
525 unsigned char *attr_name;
526
527 if (!capable(CAP_SYS_ADMIN))
528 return -XFS_ERROR(EPERM);
529 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
530 return -XFS_ERROR(EFAULT);
531
532 /* overflow check */
533 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
534 return -E2BIG;
535
536 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
537 if (IS_ERR(dentry))
538 return PTR_ERR(dentry);
539
540 error = E2BIG;
541 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
542 if (!size || size > 16 * PAGE_SIZE)
543 goto out_dput;
544
545 ops = memdup_user(am_hreq.ops, size);
546 if (IS_ERR(ops)) {
547 error = PTR_ERR(ops);
548 goto out_dput;
549 }
550
551 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
552 if (!attr_name)
553 goto out_kfree_ops;
554
555 error = 0;
556 for (i = 0; i < am_hreq.opcount; i++) {
557 ops[i].am_error = strncpy_from_user((char *)attr_name,
558 ops[i].am_attrname, MAXNAMELEN);
559 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
560 error = -ERANGE;
561 if (ops[i].am_error < 0)
562 break;
563
564 switch (ops[i].am_opcode) {
565 case ATTR_OP_GET:
566 ops[i].am_error = xfs_attrmulti_attr_get(
567 dentry->d_inode, attr_name,
568 ops[i].am_attrvalue, &ops[i].am_length,
569 ops[i].am_flags);
570 break;
571 case ATTR_OP_SET:
572 ops[i].am_error = mnt_want_write_file(parfilp);
573 if (ops[i].am_error)
574 break;
575 ops[i].am_error = xfs_attrmulti_attr_set(
576 dentry->d_inode, attr_name,
577 ops[i].am_attrvalue, ops[i].am_length,
578 ops[i].am_flags);
579 mnt_drop_write_file(parfilp);
580 break;
581 case ATTR_OP_REMOVE:
582 ops[i].am_error = mnt_want_write_file(parfilp);
583 if (ops[i].am_error)
584 break;
585 ops[i].am_error = xfs_attrmulti_attr_remove(
586 dentry->d_inode, attr_name,
587 ops[i].am_flags);
588 mnt_drop_write_file(parfilp);
589 break;
590 default:
591 ops[i].am_error = EINVAL;
592 }
593 }
594
595 if (copy_to_user(am_hreq.ops, ops, size))
596 error = XFS_ERROR(EFAULT);
597
598 kfree(attr_name);
599 out_kfree_ops:
600 kfree(ops);
601 out_dput:
602 dput(dentry);
603 return -error;
604 }
605
606 int
607 xfs_ioc_space(
608 struct xfs_inode *ip,
609 struct inode *inode,
610 struct file *filp,
611 int ioflags,
612 unsigned int cmd,
613 xfs_flock64_t *bf)
614 {
615 int attr_flags = 0;
616 int error;
617
618 /*
619 * Only allow the sys admin to reserve space unless
620 * unwritten extents are enabled.
621 */
622 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
623 !capable(CAP_SYS_ADMIN))
624 return -XFS_ERROR(EPERM);
625
626 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
627 return -XFS_ERROR(EPERM);
628
629 if (!(filp->f_mode & FMODE_WRITE))
630 return -XFS_ERROR(EBADF);
631
632 if (!S_ISREG(inode->i_mode))
633 return -XFS_ERROR(EINVAL);
634
635 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
636 attr_flags |= XFS_ATTR_NONBLOCK;
637
638 if (filp->f_flags & O_DSYNC)
639 attr_flags |= XFS_ATTR_SYNC;
640
641 if (ioflags & IO_INVIS)
642 attr_flags |= XFS_ATTR_DMI;
643
644 error = mnt_want_write_file(filp);
645 if (error)
646 return error;
647 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
648 mnt_drop_write_file(filp);
649 return -error;
650 }
651
652 STATIC int
653 xfs_ioc_bulkstat(
654 xfs_mount_t *mp,
655 unsigned int cmd,
656 void __user *arg)
657 {
658 xfs_fsop_bulkreq_t bulkreq;
659 int count; /* # of records returned */
660 xfs_ino_t inlast; /* last inode number */
661 int done;
662 int error;
663
664 /* done = 1 if there are more stats to get and if bulkstat */
665 /* should be called again (unused here, but used in dmapi) */
666
667 if (!capable(CAP_SYS_ADMIN))
668 return -EPERM;
669
670 if (XFS_FORCED_SHUTDOWN(mp))
671 return -XFS_ERROR(EIO);
672
673 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
674 return -XFS_ERROR(EFAULT);
675
676 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
677 return -XFS_ERROR(EFAULT);
678
679 if ((count = bulkreq.icount) <= 0)
680 return -XFS_ERROR(EINVAL);
681
682 if (bulkreq.ubuffer == NULL)
683 return -XFS_ERROR(EINVAL);
684
685 if (cmd == XFS_IOC_FSINUMBERS)
686 error = xfs_inumbers(mp, &inlast, &count,
687 bulkreq.ubuffer, xfs_inumbers_fmt);
688 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
689 error = xfs_bulkstat_single(mp, &inlast,
690 bulkreq.ubuffer, &done);
691 else /* XFS_IOC_FSBULKSTAT */
692 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
693 sizeof(xfs_bstat_t), bulkreq.ubuffer,
694 &done);
695
696 if (error)
697 return -error;
698
699 if (bulkreq.ocount != NULL) {
700 if (copy_to_user(bulkreq.lastip, &inlast,
701 sizeof(xfs_ino_t)))
702 return -XFS_ERROR(EFAULT);
703
704 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
705 return -XFS_ERROR(EFAULT);
706 }
707
708 return 0;
709 }
710
711 STATIC int
712 xfs_ioc_fsgeometry_v1(
713 xfs_mount_t *mp,
714 void __user *arg)
715 {
716 xfs_fsop_geom_t fsgeo;
717 int error;
718
719 error = xfs_fs_geometry(mp, &fsgeo, 3);
720 if (error)
721 return -error;
722
723 /*
724 * Caller should have passed an argument of type
725 * xfs_fsop_geom_v1_t. This is a proper subset of the
726 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
727 */
728 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
729 return -XFS_ERROR(EFAULT);
730 return 0;
731 }
732
733 STATIC int
734 xfs_ioc_fsgeometry(
735 xfs_mount_t *mp,
736 void __user *arg)
737 {
738 xfs_fsop_geom_t fsgeo;
739 int error;
740
741 error = xfs_fs_geometry(mp, &fsgeo, 4);
742 if (error)
743 return -error;
744
745 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
746 return -XFS_ERROR(EFAULT);
747 return 0;
748 }
749
750 /*
751 * Linux extended inode flags interface.
752 */
753
754 STATIC unsigned int
755 xfs_merge_ioc_xflags(
756 unsigned int flags,
757 unsigned int start)
758 {
759 unsigned int xflags = start;
760
761 if (flags & FS_IMMUTABLE_FL)
762 xflags |= XFS_XFLAG_IMMUTABLE;
763 else
764 xflags &= ~XFS_XFLAG_IMMUTABLE;
765 if (flags & FS_APPEND_FL)
766 xflags |= XFS_XFLAG_APPEND;
767 else
768 xflags &= ~XFS_XFLAG_APPEND;
769 if (flags & FS_SYNC_FL)
770 xflags |= XFS_XFLAG_SYNC;
771 else
772 xflags &= ~XFS_XFLAG_SYNC;
773 if (flags & FS_NOATIME_FL)
774 xflags |= XFS_XFLAG_NOATIME;
775 else
776 xflags &= ~XFS_XFLAG_NOATIME;
777 if (flags & FS_NODUMP_FL)
778 xflags |= XFS_XFLAG_NODUMP;
779 else
780 xflags &= ~XFS_XFLAG_NODUMP;
781
782 return xflags;
783 }
784
785 STATIC unsigned int
786 xfs_di2lxflags(
787 __uint16_t di_flags)
788 {
789 unsigned int flags = 0;
790
791 if (di_flags & XFS_DIFLAG_IMMUTABLE)
792 flags |= FS_IMMUTABLE_FL;
793 if (di_flags & XFS_DIFLAG_APPEND)
794 flags |= FS_APPEND_FL;
795 if (di_flags & XFS_DIFLAG_SYNC)
796 flags |= FS_SYNC_FL;
797 if (di_flags & XFS_DIFLAG_NOATIME)
798 flags |= FS_NOATIME_FL;
799 if (di_flags & XFS_DIFLAG_NODUMP)
800 flags |= FS_NODUMP_FL;
801 return flags;
802 }
803
804 STATIC int
805 xfs_ioc_fsgetxattr(
806 xfs_inode_t *ip,
807 int attr,
808 void __user *arg)
809 {
810 struct fsxattr fa;
811
812 memset(&fa, 0, sizeof(struct fsxattr));
813
814 xfs_ilock(ip, XFS_ILOCK_SHARED);
815 fa.fsx_xflags = xfs_ip2xflags(ip);
816 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
817 fa.fsx_projid = xfs_get_projid(ip);
818
819 if (attr) {
820 if (ip->i_afp) {
821 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
822 fa.fsx_nextents = ip->i_afp->if_bytes /
823 sizeof(xfs_bmbt_rec_t);
824 else
825 fa.fsx_nextents = ip->i_d.di_anextents;
826 } else
827 fa.fsx_nextents = 0;
828 } else {
829 if (ip->i_df.if_flags & XFS_IFEXTENTS)
830 fa.fsx_nextents = ip->i_df.if_bytes /
831 sizeof(xfs_bmbt_rec_t);
832 else
833 fa.fsx_nextents = ip->i_d.di_nextents;
834 }
835 xfs_iunlock(ip, XFS_ILOCK_SHARED);
836
837 if (copy_to_user(arg, &fa, sizeof(fa)))
838 return -EFAULT;
839 return 0;
840 }
841
842 STATIC void
843 xfs_set_diflags(
844 struct xfs_inode *ip,
845 unsigned int xflags)
846 {
847 unsigned int di_flags;
848
849 /* can't set PREALLOC this way, just preserve it */
850 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
851 if (xflags & XFS_XFLAG_IMMUTABLE)
852 di_flags |= XFS_DIFLAG_IMMUTABLE;
853 if (xflags & XFS_XFLAG_APPEND)
854 di_flags |= XFS_DIFLAG_APPEND;
855 if (xflags & XFS_XFLAG_SYNC)
856 di_flags |= XFS_DIFLAG_SYNC;
857 if (xflags & XFS_XFLAG_NOATIME)
858 di_flags |= XFS_DIFLAG_NOATIME;
859 if (xflags & XFS_XFLAG_NODUMP)
860 di_flags |= XFS_DIFLAG_NODUMP;
861 if (xflags & XFS_XFLAG_PROJINHERIT)
862 di_flags |= XFS_DIFLAG_PROJINHERIT;
863 if (xflags & XFS_XFLAG_NODEFRAG)
864 di_flags |= XFS_DIFLAG_NODEFRAG;
865 if (xflags & XFS_XFLAG_FILESTREAM)
866 di_flags |= XFS_DIFLAG_FILESTREAM;
867 if (S_ISDIR(ip->i_d.di_mode)) {
868 if (xflags & XFS_XFLAG_RTINHERIT)
869 di_flags |= XFS_DIFLAG_RTINHERIT;
870 if (xflags & XFS_XFLAG_NOSYMLINKS)
871 di_flags |= XFS_DIFLAG_NOSYMLINKS;
872 if (xflags & XFS_XFLAG_EXTSZINHERIT)
873 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
874 } else if (S_ISREG(ip->i_d.di_mode)) {
875 if (xflags & XFS_XFLAG_REALTIME)
876 di_flags |= XFS_DIFLAG_REALTIME;
877 if (xflags & XFS_XFLAG_EXTSIZE)
878 di_flags |= XFS_DIFLAG_EXTSIZE;
879 }
880
881 ip->i_d.di_flags = di_flags;
882 }
883
884 STATIC void
885 xfs_diflags_to_linux(
886 struct xfs_inode *ip)
887 {
888 struct inode *inode = VFS_I(ip);
889 unsigned int xflags = xfs_ip2xflags(ip);
890
891 if (xflags & XFS_XFLAG_IMMUTABLE)
892 inode->i_flags |= S_IMMUTABLE;
893 else
894 inode->i_flags &= ~S_IMMUTABLE;
895 if (xflags & XFS_XFLAG_APPEND)
896 inode->i_flags |= S_APPEND;
897 else
898 inode->i_flags &= ~S_APPEND;
899 if (xflags & XFS_XFLAG_SYNC)
900 inode->i_flags |= S_SYNC;
901 else
902 inode->i_flags &= ~S_SYNC;
903 if (xflags & XFS_XFLAG_NOATIME)
904 inode->i_flags |= S_NOATIME;
905 else
906 inode->i_flags &= ~S_NOATIME;
907 }
908
909 #define FSX_PROJID 1
910 #define FSX_EXTSIZE 2
911 #define FSX_XFLAGS 4
912 #define FSX_NONBLOCK 8
913
914 STATIC int
915 xfs_ioctl_setattr(
916 xfs_inode_t *ip,
917 struct fsxattr *fa,
918 int mask)
919 {
920 struct xfs_mount *mp = ip->i_mount;
921 struct xfs_trans *tp;
922 unsigned int lock_flags = 0;
923 struct xfs_dquot *udqp = NULL;
924 struct xfs_dquot *gdqp = NULL;
925 struct xfs_dquot *olddquot = NULL;
926 int code;
927
928 trace_xfs_ioctl_setattr(ip);
929
930 if (mp->m_flags & XFS_MOUNT_RDONLY)
931 return XFS_ERROR(EROFS);
932 if (XFS_FORCED_SHUTDOWN(mp))
933 return XFS_ERROR(EIO);
934
935 /*
936 * Disallow 32bit project ids when projid32bit feature is not enabled.
937 */
938 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
939 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
940 return XFS_ERROR(EINVAL);
941
942 /*
943 * If disk quotas is on, we make sure that the dquots do exist on disk,
944 * before we start any other transactions. Trying to do this later
945 * is messy. We don't care to take a readlock to look at the ids
946 * in inode here, because we can't hold it across the trans_reserve.
947 * If the IDs do change before we take the ilock, we're covered
948 * because the i_*dquot fields will get updated anyway.
949 */
950 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
951 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
952 ip->i_d.di_gid, fa->fsx_projid,
953 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
954 if (code)
955 return code;
956 }
957
958 /*
959 * For the other attributes, we acquire the inode lock and
960 * first do an error checking pass.
961 */
962 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
963 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
964 if (code)
965 goto error_return;
966
967 lock_flags = XFS_ILOCK_EXCL;
968 xfs_ilock(ip, lock_flags);
969
970 /*
971 * CAP_FOWNER overrides the following restrictions:
972 *
973 * The user ID of the calling process must be equal
974 * to the file owner ID, except in cases where the
975 * CAP_FSETID capability is applicable.
976 */
977 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
978 code = XFS_ERROR(EPERM);
979 goto error_return;
980 }
981
982 /*
983 * Do a quota reservation only if projid is actually going to change.
984 */
985 if (mask & FSX_PROJID) {
986 if (XFS_IS_QUOTA_RUNNING(mp) &&
987 XFS_IS_PQUOTA_ON(mp) &&
988 xfs_get_projid(ip) != fa->fsx_projid) {
989 ASSERT(tp);
990 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
991 capable(CAP_FOWNER) ?
992 XFS_QMOPT_FORCE_RES : 0);
993 if (code) /* out of quota */
994 goto error_return;
995 }
996 }
997
998 if (mask & FSX_EXTSIZE) {
999 /*
1000 * Can't change extent size if any extents are allocated.
1001 */
1002 if (ip->i_d.di_nextents &&
1003 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1004 fa->fsx_extsize)) {
1005 code = XFS_ERROR(EINVAL); /* EFBIG? */
1006 goto error_return;
1007 }
1008
1009 /*
1010 * Extent size must be a multiple of the appropriate block
1011 * size, if set at all. It must also be smaller than the
1012 * maximum extent size supported by the filesystem.
1013 *
1014 * Also, for non-realtime files, limit the extent size hint to
1015 * half the size of the AGs in the filesystem so alignment
1016 * doesn't result in extents larger than an AG.
1017 */
1018 if (fa->fsx_extsize != 0) {
1019 xfs_extlen_t size;
1020 xfs_fsblock_t extsize_fsb;
1021
1022 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1023 if (extsize_fsb > MAXEXTLEN) {
1024 code = XFS_ERROR(EINVAL);
1025 goto error_return;
1026 }
1027
1028 if (XFS_IS_REALTIME_INODE(ip) ||
1029 ((mask & FSX_XFLAGS) &&
1030 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1031 size = mp->m_sb.sb_rextsize <<
1032 mp->m_sb.sb_blocklog;
1033 } else {
1034 size = mp->m_sb.sb_blocksize;
1035 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1036 code = XFS_ERROR(EINVAL);
1037 goto error_return;
1038 }
1039 }
1040
1041 if (fa->fsx_extsize % size) {
1042 code = XFS_ERROR(EINVAL);
1043 goto error_return;
1044 }
1045 }
1046 }
1047
1048
1049 if (mask & FSX_XFLAGS) {
1050 /*
1051 * Can't change realtime flag if any extents are allocated.
1052 */
1053 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1054 (XFS_IS_REALTIME_INODE(ip)) !=
1055 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1056 code = XFS_ERROR(EINVAL); /* EFBIG? */
1057 goto error_return;
1058 }
1059
1060 /*
1061 * If realtime flag is set then must have realtime data.
1062 */
1063 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1064 if ((mp->m_sb.sb_rblocks == 0) ||
1065 (mp->m_sb.sb_rextsize == 0) ||
1066 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1067 code = XFS_ERROR(EINVAL);
1068 goto error_return;
1069 }
1070 }
1071
1072 /*
1073 * Can't modify an immutable/append-only file unless
1074 * we have appropriate permission.
1075 */
1076 if ((ip->i_d.di_flags &
1077 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1078 (fa->fsx_xflags &
1079 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1080 !capable(CAP_LINUX_IMMUTABLE)) {
1081 code = XFS_ERROR(EPERM);
1082 goto error_return;
1083 }
1084 }
1085
1086 xfs_trans_ijoin(tp, ip, 0);
1087
1088 /*
1089 * Change file ownership. Must be the owner or privileged.
1090 */
1091 if (mask & FSX_PROJID) {
1092 /*
1093 * CAP_FSETID overrides the following restrictions:
1094 *
1095 * The set-user-ID and set-group-ID bits of a file will be
1096 * cleared upon successful return from chown()
1097 */
1098 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1099 !capable(CAP_FSETID))
1100 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1101
1102 /*
1103 * Change the ownerships and register quota modifications
1104 * in the transaction.
1105 */
1106 if (xfs_get_projid(ip) != fa->fsx_projid) {
1107 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1108 olddquot = xfs_qm_vop_chown(tp, ip,
1109 &ip->i_gdquot, gdqp);
1110 }
1111 xfs_set_projid(ip, fa->fsx_projid);
1112
1113 /*
1114 * We may have to rev the inode as well as
1115 * the superblock version number since projids didn't
1116 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1117 */
1118 if (ip->i_d.di_version == 1)
1119 xfs_bump_ino_vers2(tp, ip);
1120 }
1121
1122 }
1123
1124 if (mask & FSX_EXTSIZE)
1125 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1126 if (mask & FSX_XFLAGS) {
1127 xfs_set_diflags(ip, fa->fsx_xflags);
1128 xfs_diflags_to_linux(ip);
1129 }
1130
1131 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1132 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1133
1134 XFS_STATS_INC(xs_ig_attrchg);
1135
1136 /*
1137 * If this is a synchronous mount, make sure that the
1138 * transaction goes to disk before returning to the user.
1139 * This is slightly sub-optimal in that truncates require
1140 * two sync transactions instead of one for wsync filesystems.
1141 * One for the truncate and one for the timestamps since we
1142 * don't want to change the timestamps unless we're sure the
1143 * truncate worked. Truncates are less than 1% of the laddis
1144 * mix so this probably isn't worth the trouble to optimize.
1145 */
1146 if (mp->m_flags & XFS_MOUNT_WSYNC)
1147 xfs_trans_set_sync(tp);
1148 code = xfs_trans_commit(tp, 0);
1149 xfs_iunlock(ip, lock_flags);
1150
1151 /*
1152 * Release any dquot(s) the inode had kept before chown.
1153 */
1154 xfs_qm_dqrele(olddquot);
1155 xfs_qm_dqrele(udqp);
1156 xfs_qm_dqrele(gdqp);
1157
1158 return code;
1159
1160 error_return:
1161 xfs_qm_dqrele(udqp);
1162 xfs_qm_dqrele(gdqp);
1163 xfs_trans_cancel(tp, 0);
1164 if (lock_flags)
1165 xfs_iunlock(ip, lock_flags);
1166 return code;
1167 }
1168
1169 STATIC int
1170 xfs_ioc_fssetxattr(
1171 xfs_inode_t *ip,
1172 struct file *filp,
1173 void __user *arg)
1174 {
1175 struct fsxattr fa;
1176 unsigned int mask;
1177 int error;
1178
1179 if (copy_from_user(&fa, arg, sizeof(fa)))
1180 return -EFAULT;
1181
1182 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1183 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1184 mask |= FSX_NONBLOCK;
1185
1186 error = mnt_want_write_file(filp);
1187 if (error)
1188 return error;
1189 error = xfs_ioctl_setattr(ip, &fa, mask);
1190 mnt_drop_write_file(filp);
1191 return -error;
1192 }
1193
1194 STATIC int
1195 xfs_ioc_getxflags(
1196 xfs_inode_t *ip,
1197 void __user *arg)
1198 {
1199 unsigned int flags;
1200
1201 flags = xfs_di2lxflags(ip->i_d.di_flags);
1202 if (copy_to_user(arg, &flags, sizeof(flags)))
1203 return -EFAULT;
1204 return 0;
1205 }
1206
1207 STATIC int
1208 xfs_ioc_setxflags(
1209 xfs_inode_t *ip,
1210 struct file *filp,
1211 void __user *arg)
1212 {
1213 struct fsxattr fa;
1214 unsigned int flags;
1215 unsigned int mask;
1216 int error;
1217
1218 if (copy_from_user(&flags, arg, sizeof(flags)))
1219 return -EFAULT;
1220
1221 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1222 FS_NOATIME_FL | FS_NODUMP_FL | \
1223 FS_SYNC_FL))
1224 return -EOPNOTSUPP;
1225
1226 mask = FSX_XFLAGS;
1227 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1228 mask |= FSX_NONBLOCK;
1229 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1230
1231 error = mnt_want_write_file(filp);
1232 if (error)
1233 return error;
1234 error = xfs_ioctl_setattr(ip, &fa, mask);
1235 mnt_drop_write_file(filp);
1236 return -error;
1237 }
1238
1239 STATIC int
1240 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1241 {
1242 struct getbmap __user *base = *ap;
1243
1244 /* copy only getbmap portion (not getbmapx) */
1245 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1246 return XFS_ERROR(EFAULT);
1247
1248 *ap += sizeof(struct getbmap);
1249 return 0;
1250 }
1251
1252 STATIC int
1253 xfs_ioc_getbmap(
1254 struct xfs_inode *ip,
1255 int ioflags,
1256 unsigned int cmd,
1257 void __user *arg)
1258 {
1259 struct getbmapx bmx;
1260 int error;
1261
1262 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1263 return -XFS_ERROR(EFAULT);
1264
1265 if (bmx.bmv_count < 2)
1266 return -XFS_ERROR(EINVAL);
1267
1268 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1269 if (ioflags & IO_INVIS)
1270 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1271
1272 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1273 (struct getbmap *)arg+1);
1274 if (error)
1275 return -error;
1276
1277 /* copy back header - only size of getbmap */
1278 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1279 return -XFS_ERROR(EFAULT);
1280 return 0;
1281 }
1282
1283 STATIC int
1284 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1285 {
1286 struct getbmapx __user *base = *ap;
1287
1288 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1289 return XFS_ERROR(EFAULT);
1290
1291 *ap += sizeof(struct getbmapx);
1292 return 0;
1293 }
1294
1295 STATIC int
1296 xfs_ioc_getbmapx(
1297 struct xfs_inode *ip,
1298 void __user *arg)
1299 {
1300 struct getbmapx bmx;
1301 int error;
1302
1303 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1304 return -XFS_ERROR(EFAULT);
1305
1306 if (bmx.bmv_count < 2)
1307 return -XFS_ERROR(EINVAL);
1308
1309 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1310 return -XFS_ERROR(EINVAL);
1311
1312 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1313 (struct getbmapx *)arg+1);
1314 if (error)
1315 return -error;
1316
1317 /* copy back header */
1318 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1319 return -XFS_ERROR(EFAULT);
1320
1321 return 0;
1322 }
1323
1324 /*
1325 * Note: some of the ioctl's return positive numbers as a
1326 * byte count indicating success, such as readlink_by_handle.
1327 * So we don't "sign flip" like most other routines. This means
1328 * true errors need to be returned as a negative value.
1329 */
1330 long
1331 xfs_file_ioctl(
1332 struct file *filp,
1333 unsigned int cmd,
1334 unsigned long p)
1335 {
1336 struct inode *inode = filp->f_path.dentry->d_inode;
1337 struct xfs_inode *ip = XFS_I(inode);
1338 struct xfs_mount *mp = ip->i_mount;
1339 void __user *arg = (void __user *)p;
1340 int ioflags = 0;
1341 int error;
1342
1343 if (filp->f_mode & FMODE_NOCMTIME)
1344 ioflags |= IO_INVIS;
1345
1346 trace_xfs_file_ioctl(ip);
1347
1348 switch (cmd) {
1349 case FITRIM:
1350 return xfs_ioc_trim(mp, arg);
1351 case XFS_IOC_ALLOCSP:
1352 case XFS_IOC_FREESP:
1353 case XFS_IOC_RESVSP:
1354 case XFS_IOC_UNRESVSP:
1355 case XFS_IOC_ALLOCSP64:
1356 case XFS_IOC_FREESP64:
1357 case XFS_IOC_RESVSP64:
1358 case XFS_IOC_UNRESVSP64:
1359 case XFS_IOC_ZERO_RANGE: {
1360 xfs_flock64_t bf;
1361
1362 if (copy_from_user(&bf, arg, sizeof(bf)))
1363 return -XFS_ERROR(EFAULT);
1364 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1365 }
1366 case XFS_IOC_DIOINFO: {
1367 struct dioattr da;
1368 xfs_buftarg_t *target =
1369 XFS_IS_REALTIME_INODE(ip) ?
1370 mp->m_rtdev_targp : mp->m_ddev_targp;
1371
1372 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1373 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1374
1375 if (copy_to_user(arg, &da, sizeof(da)))
1376 return -XFS_ERROR(EFAULT);
1377 return 0;
1378 }
1379
1380 case XFS_IOC_FSBULKSTAT_SINGLE:
1381 case XFS_IOC_FSBULKSTAT:
1382 case XFS_IOC_FSINUMBERS:
1383 return xfs_ioc_bulkstat(mp, cmd, arg);
1384
1385 case XFS_IOC_FSGEOMETRY_V1:
1386 return xfs_ioc_fsgeometry_v1(mp, arg);
1387
1388 case XFS_IOC_FSGEOMETRY:
1389 return xfs_ioc_fsgeometry(mp, arg);
1390
1391 case XFS_IOC_GETVERSION:
1392 return put_user(inode->i_generation, (int __user *)arg);
1393
1394 case XFS_IOC_FSGETXATTR:
1395 return xfs_ioc_fsgetxattr(ip, 0, arg);
1396 case XFS_IOC_FSGETXATTRA:
1397 return xfs_ioc_fsgetxattr(ip, 1, arg);
1398 case XFS_IOC_FSSETXATTR:
1399 return xfs_ioc_fssetxattr(ip, filp, arg);
1400 case XFS_IOC_GETXFLAGS:
1401 return xfs_ioc_getxflags(ip, arg);
1402 case XFS_IOC_SETXFLAGS:
1403 return xfs_ioc_setxflags(ip, filp, arg);
1404
1405 case XFS_IOC_FSSETDM: {
1406 struct fsdmidata dmi;
1407
1408 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1409 return -XFS_ERROR(EFAULT);
1410
1411 error = mnt_want_write_file(filp);
1412 if (error)
1413 return error;
1414
1415 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1416 dmi.fsd_dmstate);
1417 mnt_drop_write_file(filp);
1418 return -error;
1419 }
1420
1421 case XFS_IOC_GETBMAP:
1422 case XFS_IOC_GETBMAPA:
1423 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1424
1425 case XFS_IOC_GETBMAPX:
1426 return xfs_ioc_getbmapx(ip, arg);
1427
1428 case XFS_IOC_FD_TO_HANDLE:
1429 case XFS_IOC_PATH_TO_HANDLE:
1430 case XFS_IOC_PATH_TO_FSHANDLE: {
1431 xfs_fsop_handlereq_t hreq;
1432
1433 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1434 return -XFS_ERROR(EFAULT);
1435 return xfs_find_handle(cmd, &hreq);
1436 }
1437 case XFS_IOC_OPEN_BY_HANDLE: {
1438 xfs_fsop_handlereq_t hreq;
1439
1440 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1441 return -XFS_ERROR(EFAULT);
1442 return xfs_open_by_handle(filp, &hreq);
1443 }
1444 case XFS_IOC_FSSETDM_BY_HANDLE:
1445 return xfs_fssetdm_by_handle(filp, arg);
1446
1447 case XFS_IOC_READLINK_BY_HANDLE: {
1448 xfs_fsop_handlereq_t hreq;
1449
1450 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1451 return -XFS_ERROR(EFAULT);
1452 return xfs_readlink_by_handle(filp, &hreq);
1453 }
1454 case XFS_IOC_ATTRLIST_BY_HANDLE:
1455 return xfs_attrlist_by_handle(filp, arg);
1456
1457 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1458 return xfs_attrmulti_by_handle(filp, arg);
1459
1460 case XFS_IOC_SWAPEXT: {
1461 struct xfs_swapext sxp;
1462
1463 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1464 return -XFS_ERROR(EFAULT);
1465 error = mnt_want_write_file(filp);
1466 if (error)
1467 return error;
1468 error = xfs_swapext(&sxp);
1469 mnt_drop_write_file(filp);
1470 return -error;
1471 }
1472
1473 case XFS_IOC_FSCOUNTS: {
1474 xfs_fsop_counts_t out;
1475
1476 error = xfs_fs_counts(mp, &out);
1477 if (error)
1478 return -error;
1479
1480 if (copy_to_user(arg, &out, sizeof(out)))
1481 return -XFS_ERROR(EFAULT);
1482 return 0;
1483 }
1484
1485 case XFS_IOC_SET_RESBLKS: {
1486 xfs_fsop_resblks_t inout;
1487 __uint64_t in;
1488
1489 if (!capable(CAP_SYS_ADMIN))
1490 return -EPERM;
1491
1492 if (mp->m_flags & XFS_MOUNT_RDONLY)
1493 return -XFS_ERROR(EROFS);
1494
1495 if (copy_from_user(&inout, arg, sizeof(inout)))
1496 return -XFS_ERROR(EFAULT);
1497
1498 error = mnt_want_write_file(filp);
1499 if (error)
1500 return error;
1501
1502 /* input parameter is passed in resblks field of structure */
1503 in = inout.resblks;
1504 error = xfs_reserve_blocks(mp, &in, &inout);
1505 mnt_drop_write_file(filp);
1506 if (error)
1507 return -error;
1508
1509 if (copy_to_user(arg, &inout, sizeof(inout)))
1510 return -XFS_ERROR(EFAULT);
1511 return 0;
1512 }
1513
1514 case XFS_IOC_GET_RESBLKS: {
1515 xfs_fsop_resblks_t out;
1516
1517 if (!capable(CAP_SYS_ADMIN))
1518 return -EPERM;
1519
1520 error = xfs_reserve_blocks(mp, NULL, &out);
1521 if (error)
1522 return -error;
1523
1524 if (copy_to_user(arg, &out, sizeof(out)))
1525 return -XFS_ERROR(EFAULT);
1526
1527 return 0;
1528 }
1529
1530 case XFS_IOC_FSGROWFSDATA: {
1531 xfs_growfs_data_t in;
1532
1533 if (copy_from_user(&in, arg, sizeof(in)))
1534 return -XFS_ERROR(EFAULT);
1535
1536 error = mnt_want_write_file(filp);
1537 if (error)
1538 return error;
1539 error = xfs_growfs_data(mp, &in);
1540 mnt_drop_write_file(filp);
1541 return -error;
1542 }
1543
1544 case XFS_IOC_FSGROWFSLOG: {
1545 xfs_growfs_log_t in;
1546
1547 if (copy_from_user(&in, arg, sizeof(in)))
1548 return -XFS_ERROR(EFAULT);
1549
1550 error = mnt_want_write_file(filp);
1551 if (error)
1552 return error;
1553 error = xfs_growfs_log(mp, &in);
1554 mnt_drop_write_file(filp);
1555 return -error;
1556 }
1557
1558 case XFS_IOC_FSGROWFSRT: {
1559 xfs_growfs_rt_t in;
1560
1561 if (copy_from_user(&in, arg, sizeof(in)))
1562 return -XFS_ERROR(EFAULT);
1563
1564 error = mnt_want_write_file(filp);
1565 if (error)
1566 return error;
1567 error = xfs_growfs_rt(mp, &in);
1568 mnt_drop_write_file(filp);
1569 return -error;
1570 }
1571
1572 case XFS_IOC_GOINGDOWN: {
1573 __uint32_t in;
1574
1575 if (!capable(CAP_SYS_ADMIN))
1576 return -EPERM;
1577
1578 if (get_user(in, (__uint32_t __user *)arg))
1579 return -XFS_ERROR(EFAULT);
1580
1581 error = xfs_fs_goingdown(mp, in);
1582 return -error;
1583 }
1584
1585 case XFS_IOC_ERROR_INJECTION: {
1586 xfs_error_injection_t in;
1587
1588 if (!capable(CAP_SYS_ADMIN))
1589 return -EPERM;
1590
1591 if (copy_from_user(&in, arg, sizeof(in)))
1592 return -XFS_ERROR(EFAULT);
1593
1594 error = xfs_errortag_add(in.errtag, mp);
1595 return -error;
1596 }
1597
1598 case XFS_IOC_ERROR_CLEARALL:
1599 if (!capable(CAP_SYS_ADMIN))
1600 return -EPERM;
1601
1602 error = xfs_errortag_clearall(mp, 1);
1603 return -error;
1604
1605 default:
1606 return -ENOTTY;
1607 }
1608 }
Linux kernel - Deliverables
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