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xfs: always use iget in bulkstat
[deliverable/linux.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_dir2.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_ioctl.h"
38 #include "xfs_btree.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_rtalloc.h"
41 #include "xfs_itable.h"
42 #include "xfs_error.h"
43 #include "xfs_rw.h"
44 #include "xfs_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 /* overflow check */
531 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
532 return -E2BIG;
533
534 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
535 if (IS_ERR(dentry))
536 return PTR_ERR(dentry);
537
538 error = E2BIG;
539 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
540 if (!size || size > 16 * PAGE_SIZE)
541 goto out_dput;
542
543 ops = memdup_user(am_hreq.ops, size);
544 if (IS_ERR(ops)) {
545 error = PTR_ERR(ops);
546 goto out_dput;
547 }
548
549 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
550 if (!attr_name)
551 goto out_kfree_ops;
552
553 error = 0;
554 for (i = 0; i < am_hreq.opcount; i++) {
555 ops[i].am_error = strncpy_from_user((char *)attr_name,
556 ops[i].am_attrname, MAXNAMELEN);
557 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
558 error = -ERANGE;
559 if (ops[i].am_error < 0)
560 break;
561
562 switch (ops[i].am_opcode) {
563 case ATTR_OP_GET:
564 ops[i].am_error = xfs_attrmulti_attr_get(
565 dentry->d_inode, attr_name,
566 ops[i].am_attrvalue, &ops[i].am_length,
567 ops[i].am_flags);
568 break;
569 case ATTR_OP_SET:
570 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
571 if (ops[i].am_error)
572 break;
573 ops[i].am_error = xfs_attrmulti_attr_set(
574 dentry->d_inode, attr_name,
575 ops[i].am_attrvalue, ops[i].am_length,
576 ops[i].am_flags);
577 mnt_drop_write(parfilp->f_path.mnt);
578 break;
579 case ATTR_OP_REMOVE:
580 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
581 if (ops[i].am_error)
582 break;
583 ops[i].am_error = xfs_attrmulti_attr_remove(
584 dentry->d_inode, attr_name,
585 ops[i].am_flags);
586 mnt_drop_write(parfilp->f_path.mnt);
587 break;
588 default:
589 ops[i].am_error = EINVAL;
590 }
591 }
592
593 if (copy_to_user(am_hreq.ops, ops, size))
594 error = XFS_ERROR(EFAULT);
595
596 kfree(attr_name);
597 out_kfree_ops:
598 kfree(ops);
599 out_dput:
600 dput(dentry);
601 return -error;
602 }
603
604 int
605 xfs_ioc_space(
606 struct xfs_inode *ip,
607 struct inode *inode,
608 struct file *filp,
609 int ioflags,
610 unsigned int cmd,
611 xfs_flock64_t *bf)
612 {
613 int attr_flags = 0;
614 int error;
615
616 /*
617 * Only allow the sys admin to reserve space unless
618 * unwritten extents are enabled.
619 */
620 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
621 !capable(CAP_SYS_ADMIN))
622 return -XFS_ERROR(EPERM);
623
624 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
625 return -XFS_ERROR(EPERM);
626
627 if (!(filp->f_mode & FMODE_WRITE))
628 return -XFS_ERROR(EBADF);
629
630 if (!S_ISREG(inode->i_mode))
631 return -XFS_ERROR(EINVAL);
632
633 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
634 attr_flags |= XFS_ATTR_NONBLOCK;
635 if (ioflags & IO_INVIS)
636 attr_flags |= XFS_ATTR_DMI;
637
638 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
639 return -error;
640 }
641
642 STATIC int
643 xfs_ioc_bulkstat(
644 xfs_mount_t *mp,
645 unsigned int cmd,
646 void __user *arg)
647 {
648 xfs_fsop_bulkreq_t bulkreq;
649 int count; /* # of records returned */
650 xfs_ino_t inlast; /* last inode number */
651 int done;
652 int error;
653
654 /* done = 1 if there are more stats to get and if bulkstat */
655 /* should be called again (unused here, but used in dmapi) */
656
657 if (!capable(CAP_SYS_ADMIN))
658 return -EPERM;
659
660 if (XFS_FORCED_SHUTDOWN(mp))
661 return -XFS_ERROR(EIO);
662
663 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
664 return -XFS_ERROR(EFAULT);
665
666 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
667 return -XFS_ERROR(EFAULT);
668
669 if ((count = bulkreq.icount) <= 0)
670 return -XFS_ERROR(EINVAL);
671
672 if (bulkreq.ubuffer == NULL)
673 return -XFS_ERROR(EINVAL);
674
675 if (cmd == XFS_IOC_FSINUMBERS)
676 error = xfs_inumbers(mp, &inlast, &count,
677 bulkreq.ubuffer, xfs_inumbers_fmt);
678 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
679 error = xfs_bulkstat_single(mp, &inlast,
680 bulkreq.ubuffer, &done);
681 else /* XFS_IOC_FSBULKSTAT */
682 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
683 sizeof(xfs_bstat_t), bulkreq.ubuffer,
684 &done);
685
686 if (error)
687 return -error;
688
689 if (bulkreq.ocount != NULL) {
690 if (copy_to_user(bulkreq.lastip, &inlast,
691 sizeof(xfs_ino_t)))
692 return -XFS_ERROR(EFAULT);
693
694 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
695 return -XFS_ERROR(EFAULT);
696 }
697
698 return 0;
699 }
700
701 STATIC int
702 xfs_ioc_fsgeometry_v1(
703 xfs_mount_t *mp,
704 void __user *arg)
705 {
706 xfs_fsop_geom_v1_t fsgeo;
707 int error;
708
709 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
710 if (error)
711 return -error;
712
713 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
714 return -XFS_ERROR(EFAULT);
715 return 0;
716 }
717
718 STATIC int
719 xfs_ioc_fsgeometry(
720 xfs_mount_t *mp,
721 void __user *arg)
722 {
723 xfs_fsop_geom_t fsgeo;
724 int error;
725
726 error = xfs_fs_geometry(mp, &fsgeo, 4);
727 if (error)
728 return -error;
729
730 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
731 return -XFS_ERROR(EFAULT);
732 return 0;
733 }
734
735 /*
736 * Linux extended inode flags interface.
737 */
738
739 STATIC unsigned int
740 xfs_merge_ioc_xflags(
741 unsigned int flags,
742 unsigned int start)
743 {
744 unsigned int xflags = start;
745
746 if (flags & FS_IMMUTABLE_FL)
747 xflags |= XFS_XFLAG_IMMUTABLE;
748 else
749 xflags &= ~XFS_XFLAG_IMMUTABLE;
750 if (flags & FS_APPEND_FL)
751 xflags |= XFS_XFLAG_APPEND;
752 else
753 xflags &= ~XFS_XFLAG_APPEND;
754 if (flags & FS_SYNC_FL)
755 xflags |= XFS_XFLAG_SYNC;
756 else
757 xflags &= ~XFS_XFLAG_SYNC;
758 if (flags & FS_NOATIME_FL)
759 xflags |= XFS_XFLAG_NOATIME;
760 else
761 xflags &= ~XFS_XFLAG_NOATIME;
762 if (flags & FS_NODUMP_FL)
763 xflags |= XFS_XFLAG_NODUMP;
764 else
765 xflags &= ~XFS_XFLAG_NODUMP;
766
767 return xflags;
768 }
769
770 STATIC unsigned int
771 xfs_di2lxflags(
772 __uint16_t di_flags)
773 {
774 unsigned int flags = 0;
775
776 if (di_flags & XFS_DIFLAG_IMMUTABLE)
777 flags |= FS_IMMUTABLE_FL;
778 if (di_flags & XFS_DIFLAG_APPEND)
779 flags |= FS_APPEND_FL;
780 if (di_flags & XFS_DIFLAG_SYNC)
781 flags |= FS_SYNC_FL;
782 if (di_flags & XFS_DIFLAG_NOATIME)
783 flags |= FS_NOATIME_FL;
784 if (di_flags & XFS_DIFLAG_NODUMP)
785 flags |= FS_NODUMP_FL;
786 return flags;
787 }
788
789 STATIC int
790 xfs_ioc_fsgetxattr(
791 xfs_inode_t *ip,
792 int attr,
793 void __user *arg)
794 {
795 struct fsxattr fa;
796
797 xfs_ilock(ip, XFS_ILOCK_SHARED);
798 fa.fsx_xflags = xfs_ip2xflags(ip);
799 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
800 fa.fsx_projid = ip->i_d.di_projid;
801
802 if (attr) {
803 if (ip->i_afp) {
804 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
805 fa.fsx_nextents = ip->i_afp->if_bytes /
806 sizeof(xfs_bmbt_rec_t);
807 else
808 fa.fsx_nextents = ip->i_d.di_anextents;
809 } else
810 fa.fsx_nextents = 0;
811 } else {
812 if (ip->i_df.if_flags & XFS_IFEXTENTS)
813 fa.fsx_nextents = ip->i_df.if_bytes /
814 sizeof(xfs_bmbt_rec_t);
815 else
816 fa.fsx_nextents = ip->i_d.di_nextents;
817 }
818 xfs_iunlock(ip, XFS_ILOCK_SHARED);
819
820 if (copy_to_user(arg, &fa, sizeof(fa)))
821 return -EFAULT;
822 return 0;
823 }
824
825 STATIC void
826 xfs_set_diflags(
827 struct xfs_inode *ip,
828 unsigned int xflags)
829 {
830 unsigned int di_flags;
831
832 /* can't set PREALLOC this way, just preserve it */
833 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
834 if (xflags & XFS_XFLAG_IMMUTABLE)
835 di_flags |= XFS_DIFLAG_IMMUTABLE;
836 if (xflags & XFS_XFLAG_APPEND)
837 di_flags |= XFS_DIFLAG_APPEND;
838 if (xflags & XFS_XFLAG_SYNC)
839 di_flags |= XFS_DIFLAG_SYNC;
840 if (xflags & XFS_XFLAG_NOATIME)
841 di_flags |= XFS_DIFLAG_NOATIME;
842 if (xflags & XFS_XFLAG_NODUMP)
843 di_flags |= XFS_DIFLAG_NODUMP;
844 if (xflags & XFS_XFLAG_PROJINHERIT)
845 di_flags |= XFS_DIFLAG_PROJINHERIT;
846 if (xflags & XFS_XFLAG_NODEFRAG)
847 di_flags |= XFS_DIFLAG_NODEFRAG;
848 if (xflags & XFS_XFLAG_FILESTREAM)
849 di_flags |= XFS_DIFLAG_FILESTREAM;
850 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
851 if (xflags & XFS_XFLAG_RTINHERIT)
852 di_flags |= XFS_DIFLAG_RTINHERIT;
853 if (xflags & XFS_XFLAG_NOSYMLINKS)
854 di_flags |= XFS_DIFLAG_NOSYMLINKS;
855 if (xflags & XFS_XFLAG_EXTSZINHERIT)
856 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
857 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
858 if (xflags & XFS_XFLAG_REALTIME)
859 di_flags |= XFS_DIFLAG_REALTIME;
860 if (xflags & XFS_XFLAG_EXTSIZE)
861 di_flags |= XFS_DIFLAG_EXTSIZE;
862 }
863
864 ip->i_d.di_flags = di_flags;
865 }
866
867 STATIC void
868 xfs_diflags_to_linux(
869 struct xfs_inode *ip)
870 {
871 struct inode *inode = VFS_I(ip);
872 unsigned int xflags = xfs_ip2xflags(ip);
873
874 if (xflags & XFS_XFLAG_IMMUTABLE)
875 inode->i_flags |= S_IMMUTABLE;
876 else
877 inode->i_flags &= ~S_IMMUTABLE;
878 if (xflags & XFS_XFLAG_APPEND)
879 inode->i_flags |= S_APPEND;
880 else
881 inode->i_flags &= ~S_APPEND;
882 if (xflags & XFS_XFLAG_SYNC)
883 inode->i_flags |= S_SYNC;
884 else
885 inode->i_flags &= ~S_SYNC;
886 if (xflags & XFS_XFLAG_NOATIME)
887 inode->i_flags |= S_NOATIME;
888 else
889 inode->i_flags &= ~S_NOATIME;
890 }
891
892 #define FSX_PROJID 1
893 #define FSX_EXTSIZE 2
894 #define FSX_XFLAGS 4
895 #define FSX_NONBLOCK 8
896
897 STATIC int
898 xfs_ioctl_setattr(
899 xfs_inode_t *ip,
900 struct fsxattr *fa,
901 int mask)
902 {
903 struct xfs_mount *mp = ip->i_mount;
904 struct xfs_trans *tp;
905 unsigned int lock_flags = 0;
906 struct xfs_dquot *udqp = NULL;
907 struct xfs_dquot *gdqp = NULL;
908 struct xfs_dquot *olddquot = NULL;
909 int code;
910
911 xfs_itrace_entry(ip);
912
913 if (mp->m_flags & XFS_MOUNT_RDONLY)
914 return XFS_ERROR(EROFS);
915 if (XFS_FORCED_SHUTDOWN(mp))
916 return XFS_ERROR(EIO);
917
918 /*
919 * If disk quotas is on, we make sure that the dquots do exist on disk,
920 * before we start any other transactions. Trying to do this later
921 * is messy. We don't care to take a readlock to look at the ids
922 * in inode here, because we can't hold it across the trans_reserve.
923 * If the IDs do change before we take the ilock, we're covered
924 * because the i_*dquot fields will get updated anyway.
925 */
926 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
927 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
928 ip->i_d.di_gid, fa->fsx_projid,
929 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
930 if (code)
931 return code;
932 }
933
934 /*
935 * For the other attributes, we acquire the inode lock and
936 * first do an error checking pass.
937 */
938 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
939 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
940 if (code)
941 goto error_return;
942
943 lock_flags = XFS_ILOCK_EXCL;
944 xfs_ilock(ip, lock_flags);
945
946 /*
947 * CAP_FOWNER overrides the following restrictions:
948 *
949 * The user ID of the calling process must be equal
950 * to the file owner ID, except in cases where the
951 * CAP_FSETID capability is applicable.
952 */
953 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
954 code = XFS_ERROR(EPERM);
955 goto error_return;
956 }
957
958 /*
959 * Do a quota reservation only if projid is actually going to change.
960 */
961 if (mask & FSX_PROJID) {
962 if (XFS_IS_QUOTA_RUNNING(mp) &&
963 XFS_IS_PQUOTA_ON(mp) &&
964 ip->i_d.di_projid != fa->fsx_projid) {
965 ASSERT(tp);
966 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
967 capable(CAP_FOWNER) ?
968 XFS_QMOPT_FORCE_RES : 0);
969 if (code) /* out of quota */
970 goto error_return;
971 }
972 }
973
974 if (mask & FSX_EXTSIZE) {
975 /*
976 * Can't change extent size if any extents are allocated.
977 */
978 if (ip->i_d.di_nextents &&
979 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
980 fa->fsx_extsize)) {
981 code = XFS_ERROR(EINVAL); /* EFBIG? */
982 goto error_return;
983 }
984
985 /*
986 * Extent size must be a multiple of the appropriate block
987 * size, if set at all.
988 */
989 if (fa->fsx_extsize != 0) {
990 xfs_extlen_t size;
991
992 if (XFS_IS_REALTIME_INODE(ip) ||
993 ((mask & FSX_XFLAGS) &&
994 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
995 size = mp->m_sb.sb_rextsize <<
996 mp->m_sb.sb_blocklog;
997 } else {
998 size = mp->m_sb.sb_blocksize;
999 }
1000
1001 if (fa->fsx_extsize % size) {
1002 code = XFS_ERROR(EINVAL);
1003 goto error_return;
1004 }
1005 }
1006 }
1007
1008
1009 if (mask & FSX_XFLAGS) {
1010 /*
1011 * Can't change realtime flag if any extents are allocated.
1012 */
1013 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1014 (XFS_IS_REALTIME_INODE(ip)) !=
1015 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1016 code = XFS_ERROR(EINVAL); /* EFBIG? */
1017 goto error_return;
1018 }
1019
1020 /*
1021 * If realtime flag is set then must have realtime data.
1022 */
1023 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1024 if ((mp->m_sb.sb_rblocks == 0) ||
1025 (mp->m_sb.sb_rextsize == 0) ||
1026 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1027 code = XFS_ERROR(EINVAL);
1028 goto error_return;
1029 }
1030 }
1031
1032 /*
1033 * Can't modify an immutable/append-only file unless
1034 * we have appropriate permission.
1035 */
1036 if ((ip->i_d.di_flags &
1037 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1038 (fa->fsx_xflags &
1039 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1040 !capable(CAP_LINUX_IMMUTABLE)) {
1041 code = XFS_ERROR(EPERM);
1042 goto error_return;
1043 }
1044 }
1045
1046 xfs_trans_ijoin(tp, ip, lock_flags);
1047 xfs_trans_ihold(tp, ip);
1048
1049 /*
1050 * Change file ownership. Must be the owner or privileged.
1051 */
1052 if (mask & FSX_PROJID) {
1053 /*
1054 * CAP_FSETID overrides the following restrictions:
1055 *
1056 * The set-user-ID and set-group-ID bits of a file will be
1057 * cleared upon successful return from chown()
1058 */
1059 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1060 !capable(CAP_FSETID))
1061 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1062
1063 /*
1064 * Change the ownerships and register quota modifications
1065 * in the transaction.
1066 */
1067 if (ip->i_d.di_projid != fa->fsx_projid) {
1068 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1069 olddquot = xfs_qm_vop_chown(tp, ip,
1070 &ip->i_gdquot, gdqp);
1071 }
1072 ip->i_d.di_projid = fa->fsx_projid;
1073
1074 /*
1075 * We may have to rev the inode as well as
1076 * the superblock version number since projids didn't
1077 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1078 */
1079 if (ip->i_d.di_version == 1)
1080 xfs_bump_ino_vers2(tp, ip);
1081 }
1082
1083 }
1084
1085 if (mask & FSX_EXTSIZE)
1086 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1087 if (mask & FSX_XFLAGS) {
1088 xfs_set_diflags(ip, fa->fsx_xflags);
1089 xfs_diflags_to_linux(ip);
1090 }
1091
1092 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1093 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1094
1095 XFS_STATS_INC(xs_ig_attrchg);
1096
1097 /*
1098 * If this is a synchronous mount, make sure that the
1099 * transaction goes to disk before returning to the user.
1100 * This is slightly sub-optimal in that truncates require
1101 * two sync transactions instead of one for wsync filesystems.
1102 * One for the truncate and one for the timestamps since we
1103 * don't want to change the timestamps unless we're sure the
1104 * truncate worked. Truncates are less than 1% of the laddis
1105 * mix so this probably isn't worth the trouble to optimize.
1106 */
1107 if (mp->m_flags & XFS_MOUNT_WSYNC)
1108 xfs_trans_set_sync(tp);
1109 code = xfs_trans_commit(tp, 0);
1110 xfs_iunlock(ip, lock_flags);
1111
1112 /*
1113 * Release any dquot(s) the inode had kept before chown.
1114 */
1115 xfs_qm_dqrele(olddquot);
1116 xfs_qm_dqrele(udqp);
1117 xfs_qm_dqrele(gdqp);
1118
1119 if (code)
1120 return code;
1121
1122 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1123 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1124 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1125 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1126 }
1127
1128 return 0;
1129
1130 error_return:
1131 xfs_qm_dqrele(udqp);
1132 xfs_qm_dqrele(gdqp);
1133 xfs_trans_cancel(tp, 0);
1134 if (lock_flags)
1135 xfs_iunlock(ip, lock_flags);
1136 return code;
1137 }
1138
1139 STATIC int
1140 xfs_ioc_fssetxattr(
1141 xfs_inode_t *ip,
1142 struct file *filp,
1143 void __user *arg)
1144 {
1145 struct fsxattr fa;
1146 unsigned int mask;
1147
1148 if (copy_from_user(&fa, arg, sizeof(fa)))
1149 return -EFAULT;
1150
1151 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1152 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1153 mask |= FSX_NONBLOCK;
1154
1155 return -xfs_ioctl_setattr(ip, &fa, mask);
1156 }
1157
1158 STATIC int
1159 xfs_ioc_getxflags(
1160 xfs_inode_t *ip,
1161 void __user *arg)
1162 {
1163 unsigned int flags;
1164
1165 flags = xfs_di2lxflags(ip->i_d.di_flags);
1166 if (copy_to_user(arg, &flags, sizeof(flags)))
1167 return -EFAULT;
1168 return 0;
1169 }
1170
1171 STATIC int
1172 xfs_ioc_setxflags(
1173 xfs_inode_t *ip,
1174 struct file *filp,
1175 void __user *arg)
1176 {
1177 struct fsxattr fa;
1178 unsigned int flags;
1179 unsigned int mask;
1180
1181 if (copy_from_user(&flags, arg, sizeof(flags)))
1182 return -EFAULT;
1183
1184 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1185 FS_NOATIME_FL | FS_NODUMP_FL | \
1186 FS_SYNC_FL))
1187 return -EOPNOTSUPP;
1188
1189 mask = FSX_XFLAGS;
1190 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1191 mask |= FSX_NONBLOCK;
1192 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1193
1194 return -xfs_ioctl_setattr(ip, &fa, mask);
1195 }
1196
1197 STATIC int
1198 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1199 {
1200 struct getbmap __user *base = *ap;
1201
1202 /* copy only getbmap portion (not getbmapx) */
1203 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1204 return XFS_ERROR(EFAULT);
1205
1206 *ap += sizeof(struct getbmap);
1207 return 0;
1208 }
1209
1210 STATIC int
1211 xfs_ioc_getbmap(
1212 struct xfs_inode *ip,
1213 int ioflags,
1214 unsigned int cmd,
1215 void __user *arg)
1216 {
1217 struct getbmapx bmx;
1218 int error;
1219
1220 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1221 return -XFS_ERROR(EFAULT);
1222
1223 if (bmx.bmv_count < 2)
1224 return -XFS_ERROR(EINVAL);
1225
1226 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1227 if (ioflags & IO_INVIS)
1228 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1229
1230 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1231 (struct getbmap *)arg+1);
1232 if (error)
1233 return -error;
1234
1235 /* copy back header - only size of getbmap */
1236 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1237 return -XFS_ERROR(EFAULT);
1238 return 0;
1239 }
1240
1241 STATIC int
1242 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1243 {
1244 struct getbmapx __user *base = *ap;
1245
1246 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1247 return XFS_ERROR(EFAULT);
1248
1249 *ap += sizeof(struct getbmapx);
1250 return 0;
1251 }
1252
1253 STATIC int
1254 xfs_ioc_getbmapx(
1255 struct xfs_inode *ip,
1256 void __user *arg)
1257 {
1258 struct getbmapx bmx;
1259 int error;
1260
1261 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1262 return -XFS_ERROR(EFAULT);
1263
1264 if (bmx.bmv_count < 2)
1265 return -XFS_ERROR(EINVAL);
1266
1267 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1268 return -XFS_ERROR(EINVAL);
1269
1270 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1271 (struct getbmapx *)arg+1);
1272 if (error)
1273 return -error;
1274
1275 /* copy back header */
1276 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1277 return -XFS_ERROR(EFAULT);
1278
1279 return 0;
1280 }
1281
1282 /*
1283 * Note: some of the ioctl's return positive numbers as a
1284 * byte count indicating success, such as readlink_by_handle.
1285 * So we don't "sign flip" like most other routines. This means
1286 * true errors need to be returned as a negative value.
1287 */
1288 long
1289 xfs_file_ioctl(
1290 struct file *filp,
1291 unsigned int cmd,
1292 unsigned long p)
1293 {
1294 struct inode *inode = filp->f_path.dentry->d_inode;
1295 struct xfs_inode *ip = XFS_I(inode);
1296 struct xfs_mount *mp = ip->i_mount;
1297 void __user *arg = (void __user *)p;
1298 int ioflags = 0;
1299 int error;
1300
1301 if (filp->f_mode & FMODE_NOCMTIME)
1302 ioflags |= IO_INVIS;
1303
1304 xfs_itrace_entry(ip);
1305
1306 switch (cmd) {
1307 case XFS_IOC_ALLOCSP:
1308 case XFS_IOC_FREESP:
1309 case XFS_IOC_RESVSP:
1310 case XFS_IOC_UNRESVSP:
1311 case XFS_IOC_ALLOCSP64:
1312 case XFS_IOC_FREESP64:
1313 case XFS_IOC_RESVSP64:
1314 case XFS_IOC_UNRESVSP64: {
1315 xfs_flock64_t bf;
1316
1317 if (copy_from_user(&bf, arg, sizeof(bf)))
1318 return -XFS_ERROR(EFAULT);
1319 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1320 }
1321 case XFS_IOC_DIOINFO: {
1322 struct dioattr da;
1323 xfs_buftarg_t *target =
1324 XFS_IS_REALTIME_INODE(ip) ?
1325 mp->m_rtdev_targp : mp->m_ddev_targp;
1326
1327 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1328 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1329
1330 if (copy_to_user(arg, &da, sizeof(da)))
1331 return -XFS_ERROR(EFAULT);
1332 return 0;
1333 }
1334
1335 case XFS_IOC_FSBULKSTAT_SINGLE:
1336 case XFS_IOC_FSBULKSTAT:
1337 case XFS_IOC_FSINUMBERS:
1338 return xfs_ioc_bulkstat(mp, cmd, arg);
1339
1340 case XFS_IOC_FSGEOMETRY_V1:
1341 return xfs_ioc_fsgeometry_v1(mp, arg);
1342
1343 case XFS_IOC_FSGEOMETRY:
1344 return xfs_ioc_fsgeometry(mp, arg);
1345
1346 case XFS_IOC_GETVERSION:
1347 return put_user(inode->i_generation, (int __user *)arg);
1348
1349 case XFS_IOC_FSGETXATTR:
1350 return xfs_ioc_fsgetxattr(ip, 0, arg);
1351 case XFS_IOC_FSGETXATTRA:
1352 return xfs_ioc_fsgetxattr(ip, 1, arg);
1353 case XFS_IOC_FSSETXATTR:
1354 return xfs_ioc_fssetxattr(ip, filp, arg);
1355 case XFS_IOC_GETXFLAGS:
1356 return xfs_ioc_getxflags(ip, arg);
1357 case XFS_IOC_SETXFLAGS:
1358 return xfs_ioc_setxflags(ip, filp, arg);
1359
1360 case XFS_IOC_FSSETDM: {
1361 struct fsdmidata dmi;
1362
1363 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1364 return -XFS_ERROR(EFAULT);
1365
1366 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1367 dmi.fsd_dmstate);
1368 return -error;
1369 }
1370
1371 case XFS_IOC_GETBMAP:
1372 case XFS_IOC_GETBMAPA:
1373 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1374
1375 case XFS_IOC_GETBMAPX:
1376 return xfs_ioc_getbmapx(ip, arg);
1377
1378 case XFS_IOC_FD_TO_HANDLE:
1379 case XFS_IOC_PATH_TO_HANDLE:
1380 case XFS_IOC_PATH_TO_FSHANDLE: {
1381 xfs_fsop_handlereq_t hreq;
1382
1383 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1384 return -XFS_ERROR(EFAULT);
1385 return xfs_find_handle(cmd, &hreq);
1386 }
1387 case XFS_IOC_OPEN_BY_HANDLE: {
1388 xfs_fsop_handlereq_t hreq;
1389
1390 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1391 return -XFS_ERROR(EFAULT);
1392 return xfs_open_by_handle(filp, &hreq);
1393 }
1394 case XFS_IOC_FSSETDM_BY_HANDLE:
1395 return xfs_fssetdm_by_handle(filp, arg);
1396
1397 case XFS_IOC_READLINK_BY_HANDLE: {
1398 xfs_fsop_handlereq_t hreq;
1399
1400 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1401 return -XFS_ERROR(EFAULT);
1402 return xfs_readlink_by_handle(filp, &hreq);
1403 }
1404 case XFS_IOC_ATTRLIST_BY_HANDLE:
1405 return xfs_attrlist_by_handle(filp, arg);
1406
1407 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1408 return xfs_attrmulti_by_handle(filp, arg);
1409
1410 case XFS_IOC_SWAPEXT: {
1411 struct xfs_swapext sxp;
1412
1413 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1414 return -XFS_ERROR(EFAULT);
1415 error = xfs_swapext(&sxp);
1416 return -error;
1417 }
1418
1419 case XFS_IOC_FSCOUNTS: {
1420 xfs_fsop_counts_t out;
1421
1422 error = xfs_fs_counts(mp, &out);
1423 if (error)
1424 return -error;
1425
1426 if (copy_to_user(arg, &out, sizeof(out)))
1427 return -XFS_ERROR(EFAULT);
1428 return 0;
1429 }
1430
1431 case XFS_IOC_SET_RESBLKS: {
1432 xfs_fsop_resblks_t inout;
1433 __uint64_t in;
1434
1435 if (!capable(CAP_SYS_ADMIN))
1436 return -EPERM;
1437
1438 if (mp->m_flags & XFS_MOUNT_RDONLY)
1439 return -XFS_ERROR(EROFS);
1440
1441 if (copy_from_user(&inout, arg, sizeof(inout)))
1442 return -XFS_ERROR(EFAULT);
1443
1444 /* input parameter is passed in resblks field of structure */
1445 in = inout.resblks;
1446 error = xfs_reserve_blocks(mp, &in, &inout);
1447 if (error)
1448 return -error;
1449
1450 if (copy_to_user(arg, &inout, sizeof(inout)))
1451 return -XFS_ERROR(EFAULT);
1452 return 0;
1453 }
1454
1455 case XFS_IOC_GET_RESBLKS: {
1456 xfs_fsop_resblks_t out;
1457
1458 if (!capable(CAP_SYS_ADMIN))
1459 return -EPERM;
1460
1461 error = xfs_reserve_blocks(mp, NULL, &out);
1462 if (error)
1463 return -error;
1464
1465 if (copy_to_user(arg, &out, sizeof(out)))
1466 return -XFS_ERROR(EFAULT);
1467
1468 return 0;
1469 }
1470
1471 case XFS_IOC_FSGROWFSDATA: {
1472 xfs_growfs_data_t in;
1473
1474 if (copy_from_user(&in, arg, sizeof(in)))
1475 return -XFS_ERROR(EFAULT);
1476
1477 error = xfs_growfs_data(mp, &in);
1478 return -error;
1479 }
1480
1481 case XFS_IOC_FSGROWFSLOG: {
1482 xfs_growfs_log_t in;
1483
1484 if (copy_from_user(&in, arg, sizeof(in)))
1485 return -XFS_ERROR(EFAULT);
1486
1487 error = xfs_growfs_log(mp, &in);
1488 return -error;
1489 }
1490
1491 case XFS_IOC_FSGROWFSRT: {
1492 xfs_growfs_rt_t in;
1493
1494 if (copy_from_user(&in, arg, sizeof(in)))
1495 return -XFS_ERROR(EFAULT);
1496
1497 error = xfs_growfs_rt(mp, &in);
1498 return -error;
1499 }
1500
1501 case XFS_IOC_GOINGDOWN: {
1502 __uint32_t in;
1503
1504 if (!capable(CAP_SYS_ADMIN))
1505 return -EPERM;
1506
1507 if (get_user(in, (__uint32_t __user *)arg))
1508 return -XFS_ERROR(EFAULT);
1509
1510 error = xfs_fs_goingdown(mp, in);
1511 return -error;
1512 }
1513
1514 case XFS_IOC_ERROR_INJECTION: {
1515 xfs_error_injection_t in;
1516
1517 if (!capable(CAP_SYS_ADMIN))
1518 return -EPERM;
1519
1520 if (copy_from_user(&in, arg, sizeof(in)))
1521 return -XFS_ERROR(EFAULT);
1522
1523 error = xfs_errortag_add(in.errtag, mp);
1524 return -error;
1525 }
1526
1527 case XFS_IOC_ERROR_CLEARALL:
1528 if (!capable(CAP_SYS_ADMIN))
1529 return -EPERM;
1530
1531 error = xfs_errortag_clearall(mp, 1);
1532 return -error;
1533
1534 default:
1535 return -ENOTTY;
1536 }
1537 }
Linux kernel - Deliverables
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