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x86, delay: tsc based udelay should have rdtsc_barrier
[linux-2.6/mini2440.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
blob5bb523d7f37e9263399444379f9ac16451b4dd62
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
55 #include <linux/capability.h>
56 #include <linux/dcache.h>
57 #include <linux/mount.h>
58 #include <linux/namei.h>
59 #include <linux/pagemap.h>
60 #include <linux/exportfs.h>
61
62 /*
63 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
64 * a file or fs handle.
65 *
66 * XFS_IOC_PATH_TO_FSHANDLE
67 * returns fs handle for a mount point or path within that mount point
68 * XFS_IOC_FD_TO_HANDLE
69 * returns full handle for a FD opened in user space
70 * XFS_IOC_PATH_TO_HANDLE
71 * returns full handle for a path
72 */
73 int
74 xfs_find_handle(
75 unsigned int cmd,
76 xfs_fsop_handlereq_t *hreq)
77 {
78 int hsize;
79 xfs_handle_t handle;
80 struct inode *inode;
81 struct file *file = NULL;
82 struct path path;
83 int error;
84 struct xfs_inode *ip;
85
86 if (cmd == XFS_IOC_FD_TO_HANDLE) {
87 file = fget(hreq->fd);
88 if (!file)
89 return -EBADF;
90 inode = file->f_path.dentry->d_inode;
91 } else {
92 error = user_lpath((const char __user *)hreq->path, &path);
93 if (error)
94 return error;
95 inode = path.dentry->d_inode;
96 }
97 ip = XFS_I(inode);
98
99 /*
100 * We can only generate handles for inodes residing on a XFS filesystem,
101 * and only for regular files, directories or symbolic links.
102 */
103 error = -EINVAL;
104 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
105 goto out_put;
106
107 error = -EBADF;
108 if (!S_ISREG(inode->i_mode) &&
109 !S_ISDIR(inode->i_mode) &&
110 !S_ISLNK(inode->i_mode))
111 goto out_put;
112
113
114 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
115
116 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
117 /*
118 * This handle only contains an fsid, zero the rest.
119 */
120 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
121 hsize = sizeof(xfs_fsid_t);
122 } else {
123 int lock_mode;
124
125 lock_mode = xfs_ilock_map_shared(ip);
126 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
127 sizeof(handle.ha_fid.fid_len);
128 handle.ha_fid.fid_pad = 0;
129 handle.ha_fid.fid_gen = ip->i_d.di_gen;
130 handle.ha_fid.fid_ino = ip->i_ino;
131 xfs_iunlock_map_shared(ip, lock_mode);
132
133 hsize = XFS_HSIZE(handle);
134 }
135
136 error = -EFAULT;
137 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
138 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
139 goto out_put;
140
141 error = 0;
142
143 out_put:
144 if (cmd == XFS_IOC_FD_TO_HANDLE)
145 fput(file);
146 else
147 path_put(&path);
148 return error;
149 }
150
151 /*
152 * No need to do permission checks on the various pathname components
153 * as the handle operations are privileged.
154 */
155 STATIC int
156 xfs_handle_acceptable(
157 void *context,
158 struct dentry *dentry)
159 {
160 return 1;
161 }
162
163 /*
164 * Convert userspace handle data into a dentry.
165 */
166 struct dentry *
167 xfs_handle_to_dentry(
168 struct file *parfilp,
169 void __user *uhandle,
170 u32 hlen)
171 {
172 xfs_handle_t handle;
173 struct xfs_fid64 fid;
174
175 /*
176 * Only allow handle opens under a directory.
177 */
178 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
179 return ERR_PTR(-ENOTDIR);
180
181 if (hlen != sizeof(xfs_handle_t))
182 return ERR_PTR(-EINVAL);
183 if (copy_from_user(&handle, uhandle, hlen))
184 return ERR_PTR(-EFAULT);
185 if (handle.ha_fid.fid_len !=
186 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
187 return ERR_PTR(-EINVAL);
188
189 memset(&fid, 0, sizeof(struct fid));
190 fid.ino = handle.ha_fid.fid_ino;
191 fid.gen = handle.ha_fid.fid_gen;
192
193 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
194 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
195 xfs_handle_acceptable, NULL);
196 }
197
198 STATIC struct dentry *
199 xfs_handlereq_to_dentry(
200 struct file *parfilp,
201 xfs_fsop_handlereq_t *hreq)
202 {
203 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
204 }
205
206 int
207 xfs_open_by_handle(
208 struct file *parfilp,
209 xfs_fsop_handlereq_t *hreq)
210 {
211 const struct cred *cred = current_cred();
212 int error;
213 int fd;
214 int permflag;
215 struct file *filp;
216 struct inode *inode;
217 struct dentry *dentry;
218
219 if (!capable(CAP_SYS_ADMIN))
220 return -XFS_ERROR(EPERM);
221
222 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
223 if (IS_ERR(dentry))
224 return PTR_ERR(dentry);
225 inode = dentry->d_inode;
226
227 /* Restrict xfs_open_by_handle to directories & regular files. */
228 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
229 error = -XFS_ERROR(EPERM);
230 goto out_dput;
231 }
232
233 #if BITS_PER_LONG != 32
234 hreq->oflags |= O_LARGEFILE;
235 #endif
236
237 /* Put open permission in namei format. */
238 permflag = hreq->oflags;
239 if ((permflag+1) & O_ACCMODE)
240 permflag++;
241 if (permflag & O_TRUNC)
242 permflag |= 2;
243
244 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
245 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
246 error = -XFS_ERROR(EPERM);
247 goto out_dput;
248 }
249
250 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
251 error = -XFS_ERROR(EACCES);
252 goto out_dput;
253 }
254
255 /* Can't write directories. */
256 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
257 error = -XFS_ERROR(EISDIR);
258 goto out_dput;
259 }
260
261 fd = get_unused_fd();
262 if (fd < 0) {
263 error = fd;
264 goto out_dput;
265 }
266
267 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
268 hreq->oflags, cred);
269 if (IS_ERR(filp)) {
270 put_unused_fd(fd);
271 return PTR_ERR(filp);
272 }
273
274 if (inode->i_mode & S_IFREG) {
275 filp->f_flags |= O_NOATIME;
276 filp->f_mode |= FMODE_NOCMTIME;
277 }
278
279 fd_install(fd, filp);
280 return fd;
281
282 out_dput:
283 dput(dentry);
284 return error;
285 }
286
287 /*
288 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
289 * unused first argument.
290 */
291 STATIC int
292 do_readlink(
293 char __user *buffer,
294 int buflen,
295 const char *link)
296 {
297 int len;
298
299 len = PTR_ERR(link);
300 if (IS_ERR(link))
301 goto out;
302
303 len = strlen(link);
304 if (len > (unsigned) buflen)
305 len = buflen;
306 if (copy_to_user(buffer, link, len))
307 len = -EFAULT;
308 out:
309 return len;
310 }
311
312
313 int
314 xfs_readlink_by_handle(
315 struct file *parfilp,
316 xfs_fsop_handlereq_t *hreq)
317 {
318 struct dentry *dentry;
319 __u32 olen;
320 void *link;
321 int error;
322
323 if (!capable(CAP_SYS_ADMIN))
324 return -XFS_ERROR(EPERM);
325
326 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
327 if (IS_ERR(dentry))
328 return PTR_ERR(dentry);
329
330 /* Restrict this handle operation to symlinks only. */
331 if (!S_ISLNK(dentry->d_inode->i_mode)) {
332 error = -XFS_ERROR(EINVAL);
333 goto out_dput;
334 }
335
336 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
337 error = -XFS_ERROR(EFAULT);
338 goto out_dput;
339 }
340
341 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
342 if (!link) {
343 error = -XFS_ERROR(ENOMEM);
344 goto out_dput;
345 }
346
347 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
348 if (error)
349 goto out_kfree;
350 error = do_readlink(hreq->ohandle, olen, link);
351 if (error)
352 goto out_kfree;
353
354 out_kfree:
355 kfree(link);
356 out_dput:
357 dput(dentry);
358 return error;
359 }
360
361 STATIC int
362 xfs_fssetdm_by_handle(
363 struct file *parfilp,
364 void __user *arg)
365 {
366 int error;
367 struct fsdmidata fsd;
368 xfs_fsop_setdm_handlereq_t dmhreq;
369 struct dentry *dentry;
370
371 if (!capable(CAP_MKNOD))
372 return -XFS_ERROR(EPERM);
373 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
374 return -XFS_ERROR(EFAULT);
375
376 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
377 if (IS_ERR(dentry))
378 return PTR_ERR(dentry);
379
380 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
381 error = -XFS_ERROR(EPERM);
382 goto out;
383 }
384
385 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
386 error = -XFS_ERROR(EFAULT);
387 goto out;
388 }
389
390 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
391 fsd.fsd_dmstate);
392
393 out:
394 dput(dentry);
395 return error;
396 }
397
398 STATIC int
399 xfs_attrlist_by_handle(
400 struct file *parfilp,
401 void __user *arg)
402 {
403 int error = -ENOMEM;
404 attrlist_cursor_kern_t *cursor;
405 xfs_fsop_attrlist_handlereq_t al_hreq;
406 struct dentry *dentry;
407 char *kbuf;
408
409 if (!capable(CAP_SYS_ADMIN))
410 return -XFS_ERROR(EPERM);
411 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
412 return -XFS_ERROR(EFAULT);
413 if (al_hreq.buflen > XATTR_LIST_MAX)
414 return -XFS_ERROR(EINVAL);
415
416 /*
417 * Reject flags, only allow namespaces.
418 */
419 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
420 return -XFS_ERROR(EINVAL);
421
422 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
423 if (IS_ERR(dentry))
424 return PTR_ERR(dentry);
425
426 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
427 if (!kbuf)
428 goto out_dput;
429
430 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
431 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
432 al_hreq.flags, cursor);
433 if (error)
434 goto out_kfree;
435
436 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
437 error = -EFAULT;
438
439 out_kfree:
440 kfree(kbuf);
441 out_dput:
442 dput(dentry);
443 return error;
444 }
445
446 int
447 xfs_attrmulti_attr_get(
448 struct inode *inode,
449 char *name,
450 char __user *ubuf,
451 __uint32_t *len,
452 __uint32_t flags)
453 {
454 char *kbuf;
455 int error = EFAULT;
456
457 if (*len > XATTR_SIZE_MAX)
458 return EINVAL;
459 kbuf = kmalloc(*len, GFP_KERNEL);
460 if (!kbuf)
461 return ENOMEM;
462
463 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
464 if (error)
465 goto out_kfree;
466
467 if (copy_to_user(ubuf, kbuf, *len))
468 error = EFAULT;
469
470 out_kfree:
471 kfree(kbuf);
472 return error;
473 }
474
475 int
476 xfs_attrmulti_attr_set(
477 struct inode *inode,
478 char *name,
479 const char __user *ubuf,
480 __uint32_t len,
481 __uint32_t flags)
482 {
483 char *kbuf;
484 int error = EFAULT;
485
486 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
487 return EPERM;
488 if (len > XATTR_SIZE_MAX)
489 return EINVAL;
490
491 kbuf = memdup_user(ubuf, len);
492 if (IS_ERR(kbuf))
493 return PTR_ERR(kbuf);
494
495 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
496
497 return error;
498 }
499
500 int
501 xfs_attrmulti_attr_remove(
502 struct inode *inode,
503 char *name,
504 __uint32_t flags)
505 {
506 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
507 return EPERM;
508 return xfs_attr_remove(XFS_I(inode), name, flags);
509 }
510
511 STATIC int
512 xfs_attrmulti_by_handle(
513 struct file *parfilp,
514 void __user *arg)
515 {
516 int error;
517 xfs_attr_multiop_t *ops;
518 xfs_fsop_attrmulti_handlereq_t am_hreq;
519 struct dentry *dentry;
520 unsigned int i, size;
521 char *attr_name;
522
523 if (!capable(CAP_SYS_ADMIN))
524 return -XFS_ERROR(EPERM);
525 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
526 return -XFS_ERROR(EFAULT);
527
528 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
529 if (IS_ERR(dentry))
530 return PTR_ERR(dentry);
531
532 error = E2BIG;
533 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
534 if (!size || size > 16 * PAGE_SIZE)
535 goto out_dput;
536
537 ops = memdup_user(am_hreq.ops, size);
538 if (IS_ERR(ops)) {
539 error = PTR_ERR(ops);
540 goto out_dput;
541 }
542
543 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
544 if (!attr_name)
545 goto out_kfree_ops;
546
547 error = 0;
548 for (i = 0; i < am_hreq.opcount; i++) {
549 ops[i].am_error = strncpy_from_user(attr_name,
550 ops[i].am_attrname, MAXNAMELEN);
551 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
552 error = -ERANGE;
553 if (ops[i].am_error < 0)
554 break;
555
556 switch (ops[i].am_opcode) {
557 case ATTR_OP_GET:
558 ops[i].am_error = xfs_attrmulti_attr_get(
559 dentry->d_inode, attr_name,
560 ops[i].am_attrvalue, &ops[i].am_length,
561 ops[i].am_flags);
562 break;
563 case ATTR_OP_SET:
564 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
565 if (ops[i].am_error)
566 break;
567 ops[i].am_error = xfs_attrmulti_attr_set(
568 dentry->d_inode, attr_name,
569 ops[i].am_attrvalue, ops[i].am_length,
570 ops[i].am_flags);
571 mnt_drop_write(parfilp->f_path.mnt);
572 break;
573 case ATTR_OP_REMOVE:
574 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
575 if (ops[i].am_error)
576 break;
577 ops[i].am_error = xfs_attrmulti_attr_remove(
578 dentry->d_inode, attr_name,
579 ops[i].am_flags);
580 mnt_drop_write(parfilp->f_path.mnt);
581 break;
582 default:
583 ops[i].am_error = EINVAL;
584 }
585 }
586
587 if (copy_to_user(am_hreq.ops, ops, size))
588 error = XFS_ERROR(EFAULT);
589
590 kfree(attr_name);
591 out_kfree_ops:
592 kfree(ops);
593 out_dput:
594 dput(dentry);
595 return -error;
596 }
597
598 int
599 xfs_ioc_space(
600 struct xfs_inode *ip,
601 struct inode *inode,
602 struct file *filp,
603 int ioflags,
604 unsigned int cmd,
605 xfs_flock64_t *bf)
606 {
607 int attr_flags = 0;
608 int error;
609
610 /*
611 * Only allow the sys admin to reserve space unless
612 * unwritten extents are enabled.
613 */
614 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
615 !capable(CAP_SYS_ADMIN))
616 return -XFS_ERROR(EPERM);
617
618 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
619 return -XFS_ERROR(EPERM);
620
621 if (!(filp->f_mode & FMODE_WRITE))
622 return -XFS_ERROR(EBADF);
623
624 if (!S_ISREG(inode->i_mode))
625 return -XFS_ERROR(EINVAL);
626
627 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
628 attr_flags |= XFS_ATTR_NONBLOCK;
629 if (ioflags & IO_INVIS)
630 attr_flags |= XFS_ATTR_DMI;
631
632 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
633 return -error;
634 }
635
636 STATIC int
637 xfs_ioc_bulkstat(
638 xfs_mount_t *mp,
639 unsigned int cmd,
640 void __user *arg)
641 {
642 xfs_fsop_bulkreq_t bulkreq;
643 int count; /* # of records returned */
644 xfs_ino_t inlast; /* last inode number */
645 int done;
646 int error;
647
648 /* done = 1 if there are more stats to get and if bulkstat */
649 /* should be called again (unused here, but used in dmapi) */
650
651 if (!capable(CAP_SYS_ADMIN))
652 return -EPERM;
653
654 if (XFS_FORCED_SHUTDOWN(mp))
655 return -XFS_ERROR(EIO);
656
657 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
658 return -XFS_ERROR(EFAULT);
659
660 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
661 return -XFS_ERROR(EFAULT);
662
663 if ((count = bulkreq.icount) <= 0)
664 return -XFS_ERROR(EINVAL);
665
666 if (bulkreq.ubuffer == NULL)
667 return -XFS_ERROR(EINVAL);
668
669 if (cmd == XFS_IOC_FSINUMBERS)
670 error = xfs_inumbers(mp, &inlast, &count,
671 bulkreq.ubuffer, xfs_inumbers_fmt);
672 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
673 error = xfs_bulkstat_single(mp, &inlast,
674 bulkreq.ubuffer, &done);
675 else /* XFS_IOC_FSBULKSTAT */
676 error = xfs_bulkstat(mp, &inlast, &count,
677 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
678 sizeof(xfs_bstat_t), bulkreq.ubuffer,
679 BULKSTAT_FG_QUICK, &done);
680
681 if (error)
682 return -error;
683
684 if (bulkreq.ocount != NULL) {
685 if (copy_to_user(bulkreq.lastip, &inlast,
686 sizeof(xfs_ino_t)))
687 return -XFS_ERROR(EFAULT);
688
689 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
690 return -XFS_ERROR(EFAULT);
691 }
692
693 return 0;
694 }
695
696 STATIC int
697 xfs_ioc_fsgeometry_v1(
698 xfs_mount_t *mp,
699 void __user *arg)
700 {
701 xfs_fsop_geom_v1_t fsgeo;
702 int error;
703
704 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
705 if (error)
706 return -error;
707
708 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
709 return -XFS_ERROR(EFAULT);
710 return 0;
711 }
712
713 STATIC int
714 xfs_ioc_fsgeometry(
715 xfs_mount_t *mp,
716 void __user *arg)
717 {
718 xfs_fsop_geom_t fsgeo;
719 int error;
720
721 error = xfs_fs_geometry(mp, &fsgeo, 4);
722 if (error)
723 return -error;
724
725 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
726 return -XFS_ERROR(EFAULT);
727 return 0;
728 }
729
730 /*
731 * Linux extended inode flags interface.
732 */
733
734 STATIC unsigned int
735 xfs_merge_ioc_xflags(
736 unsigned int flags,
737 unsigned int start)
738 {
739 unsigned int xflags = start;
740
741 if (flags & FS_IMMUTABLE_FL)
742 xflags |= XFS_XFLAG_IMMUTABLE;
743 else
744 xflags &= ~XFS_XFLAG_IMMUTABLE;
745 if (flags & FS_APPEND_FL)
746 xflags |= XFS_XFLAG_APPEND;
747 else
748 xflags &= ~XFS_XFLAG_APPEND;
749 if (flags & FS_SYNC_FL)
750 xflags |= XFS_XFLAG_SYNC;
751 else
752 xflags &= ~XFS_XFLAG_SYNC;
753 if (flags & FS_NOATIME_FL)
754 xflags |= XFS_XFLAG_NOATIME;
755 else
756 xflags &= ~XFS_XFLAG_NOATIME;
757 if (flags & FS_NODUMP_FL)
758 xflags |= XFS_XFLAG_NODUMP;
759 else
760 xflags &= ~XFS_XFLAG_NODUMP;
761
762 return xflags;
763 }
764
765 STATIC unsigned int
766 xfs_di2lxflags(
767 __uint16_t di_flags)
768 {
769 unsigned int flags = 0;
770
771 if (di_flags & XFS_DIFLAG_IMMUTABLE)
772 flags |= FS_IMMUTABLE_FL;
773 if (di_flags & XFS_DIFLAG_APPEND)
774 flags |= FS_APPEND_FL;
775 if (di_flags & XFS_DIFLAG_SYNC)
776 flags |= FS_SYNC_FL;
777 if (di_flags & XFS_DIFLAG_NOATIME)
778 flags |= FS_NOATIME_FL;
779 if (di_flags & XFS_DIFLAG_NODUMP)
780 flags |= FS_NODUMP_FL;
781 return flags;
782 }
783
784 STATIC int
785 xfs_ioc_fsgetxattr(
786 xfs_inode_t *ip,
787 int attr,
788 void __user *arg)
789 {
790 struct fsxattr fa;
791
792 xfs_ilock(ip, XFS_ILOCK_SHARED);
793 fa.fsx_xflags = xfs_ip2xflags(ip);
794 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
795 fa.fsx_projid = ip->i_d.di_projid;
796
797 if (attr) {
798 if (ip->i_afp) {
799 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
800 fa.fsx_nextents = ip->i_afp->if_bytes /
801 sizeof(xfs_bmbt_rec_t);
802 else
803 fa.fsx_nextents = ip->i_d.di_anextents;
804 } else
805 fa.fsx_nextents = 0;
806 } else {
807 if (ip->i_df.if_flags & XFS_IFEXTENTS)
808 fa.fsx_nextents = ip->i_df.if_bytes /
809 sizeof(xfs_bmbt_rec_t);
810 else
811 fa.fsx_nextents = ip->i_d.di_nextents;
812 }
813 xfs_iunlock(ip, XFS_ILOCK_SHARED);
814
815 if (copy_to_user(arg, &fa, sizeof(fa)))
816 return -EFAULT;
817 return 0;
818 }
819
820 STATIC void
821 xfs_set_diflags(
822 struct xfs_inode *ip,
823 unsigned int xflags)
824 {
825 unsigned int di_flags;
826
827 /* can't set PREALLOC this way, just preserve it */
828 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
829 if (xflags & XFS_XFLAG_IMMUTABLE)
830 di_flags |= XFS_DIFLAG_IMMUTABLE;
831 if (xflags & XFS_XFLAG_APPEND)
832 di_flags |= XFS_DIFLAG_APPEND;
833 if (xflags & XFS_XFLAG_SYNC)
834 di_flags |= XFS_DIFLAG_SYNC;
835 if (xflags & XFS_XFLAG_NOATIME)
836 di_flags |= XFS_DIFLAG_NOATIME;
837 if (xflags & XFS_XFLAG_NODUMP)
838 di_flags |= XFS_DIFLAG_NODUMP;
839 if (xflags & XFS_XFLAG_PROJINHERIT)
840 di_flags |= XFS_DIFLAG_PROJINHERIT;
841 if (xflags & XFS_XFLAG_NODEFRAG)
842 di_flags |= XFS_DIFLAG_NODEFRAG;
843 if (xflags & XFS_XFLAG_FILESTREAM)
844 di_flags |= XFS_DIFLAG_FILESTREAM;
845 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
846 if (xflags & XFS_XFLAG_RTINHERIT)
847 di_flags |= XFS_DIFLAG_RTINHERIT;
848 if (xflags & XFS_XFLAG_NOSYMLINKS)
849 di_flags |= XFS_DIFLAG_NOSYMLINKS;
850 if (xflags & XFS_XFLAG_EXTSZINHERIT)
851 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
852 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
853 if (xflags & XFS_XFLAG_REALTIME)
854 di_flags |= XFS_DIFLAG_REALTIME;
855 if (xflags & XFS_XFLAG_EXTSIZE)
856 di_flags |= XFS_DIFLAG_EXTSIZE;
857 }
858
859 ip->i_d.di_flags = di_flags;
860 }
861
862 STATIC void
863 xfs_diflags_to_linux(
864 struct xfs_inode *ip)
865 {
866 struct inode *inode = VFS_I(ip);
867 unsigned int xflags = xfs_ip2xflags(ip);
868
869 if (xflags & XFS_XFLAG_IMMUTABLE)
870 inode->i_flags |= S_IMMUTABLE;
871 else
872 inode->i_flags &= ~S_IMMUTABLE;
873 if (xflags & XFS_XFLAG_APPEND)
874 inode->i_flags |= S_APPEND;
875 else
876 inode->i_flags &= ~S_APPEND;
877 if (xflags & XFS_XFLAG_SYNC)
878 inode->i_flags |= S_SYNC;
879 else
880 inode->i_flags &= ~S_SYNC;
881 if (xflags & XFS_XFLAG_NOATIME)
882 inode->i_flags |= S_NOATIME;
883 else
884 inode->i_flags &= ~S_NOATIME;
885 }
886
887 #define FSX_PROJID 1
888 #define FSX_EXTSIZE 2
889 #define FSX_XFLAGS 4
890 #define FSX_NONBLOCK 8
891
892 STATIC int
893 xfs_ioctl_setattr(
894 xfs_inode_t *ip,
895 struct fsxattr *fa,
896 int mask)
897 {
898 struct xfs_mount *mp = ip->i_mount;
899 struct xfs_trans *tp;
900 unsigned int lock_flags = 0;
901 struct xfs_dquot *udqp = NULL;
902 struct xfs_dquot *gdqp = NULL;
903 struct xfs_dquot *olddquot = NULL;
904 int code;
905
906 xfs_itrace_entry(ip);
907
908 if (mp->m_flags & XFS_MOUNT_RDONLY)
909 return XFS_ERROR(EROFS);
910 if (XFS_FORCED_SHUTDOWN(mp))
911 return XFS_ERROR(EIO);
912
913 /*
914 * If disk quotas is on, we make sure that the dquots do exist on disk,
915 * before we start any other transactions. Trying to do this later
916 * is messy. We don't care to take a readlock to look at the ids
917 * in inode here, because we can't hold it across the trans_reserve.
918 * If the IDs do change before we take the ilock, we're covered
919 * because the i_*dquot fields will get updated anyway.
920 */
921 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
922 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
923 ip->i_d.di_gid, fa->fsx_projid,
924 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
925 if (code)
926 return code;
927 }
928
929 /*
930 * For the other attributes, we acquire the inode lock and
931 * first do an error checking pass.
932 */
933 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
934 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
935 if (code)
936 goto error_return;
937
938 lock_flags = XFS_ILOCK_EXCL;
939 xfs_ilock(ip, lock_flags);
940
941 /*
942 * CAP_FOWNER overrides the following restrictions:
943 *
944 * The user ID of the calling process must be equal
945 * to the file owner ID, except in cases where the
946 * CAP_FSETID capability is applicable.
947 */
948 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
949 code = XFS_ERROR(EPERM);
950 goto error_return;
951 }
952
953 /*
954 * Do a quota reservation only if projid is actually going to change.
955 */
956 if (mask & FSX_PROJID) {
957 if (XFS_IS_QUOTA_RUNNING(mp) &&
958 XFS_IS_PQUOTA_ON(mp) &&
959 ip->i_d.di_projid != fa->fsx_projid) {
960 ASSERT(tp);
961 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
962 capable(CAP_FOWNER) ?
963 XFS_QMOPT_FORCE_RES : 0);
964 if (code) /* out of quota */
965 goto error_return;
966 }
967 }
968
969 if (mask & FSX_EXTSIZE) {
970 /*
971 * Can't change extent size if any extents are allocated.
972 */
973 if (ip->i_d.di_nextents &&
974 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
975 fa->fsx_extsize)) {
976 code = XFS_ERROR(EINVAL); /* EFBIG? */
977 goto error_return;
978 }
979
980 /*
981 * Extent size must be a multiple of the appropriate block
982 * size, if set at all.
983 */
984 if (fa->fsx_extsize != 0) {
985 xfs_extlen_t size;
986
987 if (XFS_IS_REALTIME_INODE(ip) ||
988 ((mask & FSX_XFLAGS) &&
989 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
990 size = mp->m_sb.sb_rextsize <<
991 mp->m_sb.sb_blocklog;
992 } else {
993 size = mp->m_sb.sb_blocksize;
994 }
995
996 if (fa->fsx_extsize % size) {
997 code = XFS_ERROR(EINVAL);
998 goto error_return;
999 }
1000 }
1001 }
1002
1003
1004 if (mask & FSX_XFLAGS) {
1005 /*
1006 * Can't change realtime flag if any extents are allocated.
1007 */
1008 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1009 (XFS_IS_REALTIME_INODE(ip)) !=
1010 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1011 code = XFS_ERROR(EINVAL); /* EFBIG? */
1012 goto error_return;
1013 }
1014
1015 /*
1016 * If realtime flag is set then must have realtime data.
1017 */
1018 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1019 if ((mp->m_sb.sb_rblocks == 0) ||
1020 (mp->m_sb.sb_rextsize == 0) ||
1021 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1022 code = XFS_ERROR(EINVAL);
1023 goto error_return;
1024 }
1025 }
1026
1027 /*
1028 * Can't modify an immutable/append-only file unless
1029 * we have appropriate permission.
1030 */
1031 if ((ip->i_d.di_flags &
1032 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1033 (fa->fsx_xflags &
1034 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1035 !capable(CAP_LINUX_IMMUTABLE)) {
1036 code = XFS_ERROR(EPERM);
1037 goto error_return;
1038 }
1039 }
1040
1041 xfs_trans_ijoin(tp, ip, lock_flags);
1042 xfs_trans_ihold(tp, ip);
1043
1044 /*
1045 * Change file ownership. Must be the owner or privileged.
1046 */
1047 if (mask & FSX_PROJID) {
1048 /*
1049 * CAP_FSETID overrides the following restrictions:
1050 *
1051 * The set-user-ID and set-group-ID bits of a file will be
1052 * cleared upon successful return from chown()
1053 */
1054 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1055 !capable(CAP_FSETID))
1056 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1057
1058 /*
1059 * Change the ownerships and register quota modifications
1060 * in the transaction.
1061 */
1062 if (ip->i_d.di_projid != fa->fsx_projid) {
1063 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1064 olddquot = xfs_qm_vop_chown(tp, ip,
1065 &ip->i_gdquot, gdqp);
1066 }
1067 ip->i_d.di_projid = fa->fsx_projid;
1068
1069 /*
1070 * We may have to rev the inode as well as
1071 * the superblock version number since projids didn't
1072 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1073 */
1074 if (ip->i_d.di_version == 1)
1075 xfs_bump_ino_vers2(tp, ip);
1076 }
1077
1078 }
1079
1080 if (mask & FSX_EXTSIZE)
1081 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1082 if (mask & FSX_XFLAGS) {
1083 xfs_set_diflags(ip, fa->fsx_xflags);
1084 xfs_diflags_to_linux(ip);
1085 }
1086
1087 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1088 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1089
1090 XFS_STATS_INC(xs_ig_attrchg);
1091
1092 /*
1093 * If this is a synchronous mount, make sure that the
1094 * transaction goes to disk before returning to the user.
1095 * This is slightly sub-optimal in that truncates require
1096 * two sync transactions instead of one for wsync filesystems.
1097 * One for the truncate and one for the timestamps since we
1098 * don't want to change the timestamps unless we're sure the
1099 * truncate worked. Truncates are less than 1% of the laddis
1100 * mix so this probably isn't worth the trouble to optimize.
1101 */
1102 if (mp->m_flags & XFS_MOUNT_WSYNC)
1103 xfs_trans_set_sync(tp);
1104 code = xfs_trans_commit(tp, 0);
1105 xfs_iunlock(ip, lock_flags);
1106
1107 /*
1108 * Release any dquot(s) the inode had kept before chown.
1109 */
1110 xfs_qm_dqrele(olddquot);
1111 xfs_qm_dqrele(udqp);
1112 xfs_qm_dqrele(gdqp);
1113
1114 if (code)
1115 return code;
1116
1117 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1118 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1119 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1120 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1121 }
1122
1123 return 0;
1124
1125 error_return:
1126 xfs_qm_dqrele(udqp);
1127 xfs_qm_dqrele(gdqp);
1128 xfs_trans_cancel(tp, 0);
1129 if (lock_flags)
1130 xfs_iunlock(ip, lock_flags);
1131 return code;
1132 }
1133
1134 STATIC int
1135 xfs_ioc_fssetxattr(
1136 xfs_inode_t *ip,
1137 struct file *filp,
1138 void __user *arg)
1139 {
1140 struct fsxattr fa;
1141 unsigned int mask;
1142
1143 if (copy_from_user(&fa, arg, sizeof(fa)))
1144 return -EFAULT;
1145
1146 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1147 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1148 mask |= FSX_NONBLOCK;
1149
1150 return -xfs_ioctl_setattr(ip, &fa, mask);
1151 }
1152
1153 STATIC int
1154 xfs_ioc_getxflags(
1155 xfs_inode_t *ip,
1156 void __user *arg)
1157 {
1158 unsigned int flags;
1159
1160 flags = xfs_di2lxflags(ip->i_d.di_flags);
1161 if (copy_to_user(arg, &flags, sizeof(flags)))
1162 return -EFAULT;
1163 return 0;
1164 }
1165
1166 STATIC int
1167 xfs_ioc_setxflags(
1168 xfs_inode_t *ip,
1169 struct file *filp,
1170 void __user *arg)
1171 {
1172 struct fsxattr fa;
1173 unsigned int flags;
1174 unsigned int mask;
1175
1176 if (copy_from_user(&flags, arg, sizeof(flags)))
1177 return -EFAULT;
1178
1179 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1180 FS_NOATIME_FL | FS_NODUMP_FL | \
1181 FS_SYNC_FL))
1182 return -EOPNOTSUPP;
1183
1184 mask = FSX_XFLAGS;
1185 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1186 mask |= FSX_NONBLOCK;
1187 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1188
1189 return -xfs_ioctl_setattr(ip, &fa, mask);
1190 }
1191
1192 STATIC int
1193 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1194 {
1195 struct getbmap __user *base = *ap;
1196
1197 /* copy only getbmap portion (not getbmapx) */
1198 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1199 return XFS_ERROR(EFAULT);
1200
1201 *ap += sizeof(struct getbmap);
1202 return 0;
1203 }
1204
1205 STATIC int
1206 xfs_ioc_getbmap(
1207 struct xfs_inode *ip,
1208 int ioflags,
1209 unsigned int cmd,
1210 void __user *arg)
1211 {
1212 struct getbmapx bmx;
1213 int error;
1214
1215 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1216 return -XFS_ERROR(EFAULT);
1217
1218 if (bmx.bmv_count < 2)
1219 return -XFS_ERROR(EINVAL);
1220
1221 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1222 if (ioflags & IO_INVIS)
1223 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1224
1225 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1226 (struct getbmap *)arg+1);
1227 if (error)
1228 return -error;
1229
1230 /* copy back header - only size of getbmap */
1231 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1232 return -XFS_ERROR(EFAULT);
1233 return 0;
1234 }
1235
1236 STATIC int
1237 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1238 {
1239 struct getbmapx __user *base = *ap;
1240
1241 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1242 return XFS_ERROR(EFAULT);
1243
1244 *ap += sizeof(struct getbmapx);
1245 return 0;
1246 }
1247
1248 STATIC int
1249 xfs_ioc_getbmapx(
1250 struct xfs_inode *ip,
1251 void __user *arg)
1252 {
1253 struct getbmapx bmx;
1254 int error;
1255
1256 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1257 return -XFS_ERROR(EFAULT);
1258
1259 if (bmx.bmv_count < 2)
1260 return -XFS_ERROR(EINVAL);
1261
1262 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1263 return -XFS_ERROR(EINVAL);
1264
1265 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1266 (struct getbmapx *)arg+1);
1267 if (error)
1268 return -error;
1269
1270 /* copy back header */
1271 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1272 return -XFS_ERROR(EFAULT);
1273
1274 return 0;
1275 }
1276
1277 /*
1278 * Note: some of the ioctl's return positive numbers as a
1279 * byte count indicating success, such as readlink_by_handle.
1280 * So we don't "sign flip" like most other routines. This means
1281 * true errors need to be returned as a negative value.
1282 */
1283 long
1284 xfs_file_ioctl(
1285 struct file *filp,
1286 unsigned int cmd,
1287 unsigned long p)
1288 {
1289 struct inode *inode = filp->f_path.dentry->d_inode;
1290 struct xfs_inode *ip = XFS_I(inode);
1291 struct xfs_mount *mp = ip->i_mount;
1292 void __user *arg = (void __user *)p;
1293 int ioflags = 0;
1294 int error;
1295
1296 if (filp->f_mode & FMODE_NOCMTIME)
1297 ioflags |= IO_INVIS;
1298
1299 xfs_itrace_entry(ip);
1300
1301 switch (cmd) {
1302 case XFS_IOC_ALLOCSP:
1303 case XFS_IOC_FREESP:
1304 case XFS_IOC_RESVSP:
1305 case XFS_IOC_UNRESVSP:
1306 case XFS_IOC_ALLOCSP64:
1307 case XFS_IOC_FREESP64:
1308 case XFS_IOC_RESVSP64:
1309 case XFS_IOC_UNRESVSP64: {
1310 xfs_flock64_t bf;
1311
1312 if (copy_from_user(&bf, arg, sizeof(bf)))
1313 return -XFS_ERROR(EFAULT);
1314 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1315 }
1316 case XFS_IOC_DIOINFO: {
1317 struct dioattr da;
1318 xfs_buftarg_t *target =
1319 XFS_IS_REALTIME_INODE(ip) ?
1320 mp->m_rtdev_targp : mp->m_ddev_targp;
1321
1322 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1323 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1324
1325 if (copy_to_user(arg, &da, sizeof(da)))
1326 return -XFS_ERROR(EFAULT);
1327 return 0;
1328 }
1329
1330 case XFS_IOC_FSBULKSTAT_SINGLE:
1331 case XFS_IOC_FSBULKSTAT:
1332 case XFS_IOC_FSINUMBERS:
1333 return xfs_ioc_bulkstat(mp, cmd, arg);
1334
1335 case XFS_IOC_FSGEOMETRY_V1:
1336 return xfs_ioc_fsgeometry_v1(mp, arg);
1337
1338 case XFS_IOC_FSGEOMETRY:
1339 return xfs_ioc_fsgeometry(mp, arg);
1340
1341 case XFS_IOC_GETVERSION:
1342 return put_user(inode->i_generation, (int __user *)arg);
1343
1344 case XFS_IOC_FSGETXATTR:
1345 return xfs_ioc_fsgetxattr(ip, 0, arg);
1346 case XFS_IOC_FSGETXATTRA:
1347 return xfs_ioc_fsgetxattr(ip, 1, arg);
1348 case XFS_IOC_FSSETXATTR:
1349 return xfs_ioc_fssetxattr(ip, filp, arg);
1350 case XFS_IOC_GETXFLAGS:
1351 return xfs_ioc_getxflags(ip, arg);
1352 case XFS_IOC_SETXFLAGS:
1353 return xfs_ioc_setxflags(ip, filp, arg);
1354
1355 case XFS_IOC_FSSETDM: {
1356 struct fsdmidata dmi;
1357
1358 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1359 return -XFS_ERROR(EFAULT);
1360
1361 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1362 dmi.fsd_dmstate);
1363 return -error;
1364 }
1365
1366 case XFS_IOC_GETBMAP:
1367 case XFS_IOC_GETBMAPA:
1368 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1369
1370 case XFS_IOC_GETBMAPX:
1371 return xfs_ioc_getbmapx(ip, arg);
1372
1373 case XFS_IOC_FD_TO_HANDLE:
1374 case XFS_IOC_PATH_TO_HANDLE:
1375 case XFS_IOC_PATH_TO_FSHANDLE: {
1376 xfs_fsop_handlereq_t hreq;
1377
1378 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1379 return -XFS_ERROR(EFAULT);
1380 return xfs_find_handle(cmd, &hreq);
1381 }
1382 case XFS_IOC_OPEN_BY_HANDLE: {
1383 xfs_fsop_handlereq_t hreq;
1384
1385 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1386 return -XFS_ERROR(EFAULT);
1387 return xfs_open_by_handle(filp, &hreq);
1388 }
1389 case XFS_IOC_FSSETDM_BY_HANDLE:
1390 return xfs_fssetdm_by_handle(filp, arg);
1391
1392 case XFS_IOC_READLINK_BY_HANDLE: {
1393 xfs_fsop_handlereq_t hreq;
1394
1395 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1396 return -XFS_ERROR(EFAULT);
1397 return xfs_readlink_by_handle(filp, &hreq);
1398 }
1399 case XFS_IOC_ATTRLIST_BY_HANDLE:
1400 return xfs_attrlist_by_handle(filp, arg);
1401
1402 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1403 return xfs_attrmulti_by_handle(filp, arg);
1404
1405 case XFS_IOC_SWAPEXT: {
1406 struct xfs_swapext sxp;
1407
1408 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1409 return -XFS_ERROR(EFAULT);
1410 error = xfs_swapext(&sxp);
1411 return -error;
1412 }
1413
1414 case XFS_IOC_FSCOUNTS: {
1415 xfs_fsop_counts_t out;
1416
1417 error = xfs_fs_counts(mp, &out);
1418 if (error)
1419 return -error;
1420
1421 if (copy_to_user(arg, &out, sizeof(out)))
1422 return -XFS_ERROR(EFAULT);
1423 return 0;
1424 }
1425
1426 case XFS_IOC_SET_RESBLKS: {
1427 xfs_fsop_resblks_t inout;
1428 __uint64_t in;
1429
1430 if (!capable(CAP_SYS_ADMIN))
1431 return -EPERM;
1432
1433 if (copy_from_user(&inout, arg, sizeof(inout)))
1434 return -XFS_ERROR(EFAULT);
1435
1436 /* input parameter is passed in resblks field of structure */
1437 in = inout.resblks;
1438 error = xfs_reserve_blocks(mp, &in, &inout);
1439 if (error)
1440 return -error;
1441
1442 if (copy_to_user(arg, &inout, sizeof(inout)))
1443 return -XFS_ERROR(EFAULT);
1444 return 0;
1445 }
1446
1447 case XFS_IOC_GET_RESBLKS: {
1448 xfs_fsop_resblks_t out;
1449
1450 if (!capable(CAP_SYS_ADMIN))
1451 return -EPERM;
1452
1453 error = xfs_reserve_blocks(mp, NULL, &out);
1454 if (error)
1455 return -error;
1456
1457 if (copy_to_user(arg, &out, sizeof(out)))
1458 return -XFS_ERROR(EFAULT);
1459
1460 return 0;
1461 }
1462
1463 case XFS_IOC_FSGROWFSDATA: {
1464 xfs_growfs_data_t in;
1465
1466 if (copy_from_user(&in, arg, sizeof(in)))
1467 return -XFS_ERROR(EFAULT);
1468
1469 error = xfs_growfs_data(mp, &in);
1470 return -error;
1471 }
1472
1473 case XFS_IOC_FSGROWFSLOG: {
1474 xfs_growfs_log_t in;
1475
1476 if (copy_from_user(&in, arg, sizeof(in)))
1477 return -XFS_ERROR(EFAULT);
1478
1479 error = xfs_growfs_log(mp, &in);
1480 return -error;
1481 }
1482
1483 case XFS_IOC_FSGROWFSRT: {
1484 xfs_growfs_rt_t in;
1485
1486 if (copy_from_user(&in, arg, sizeof(in)))
1487 return -XFS_ERROR(EFAULT);
1488
1489 error = xfs_growfs_rt(mp, &in);
1490 return -error;
1491 }
1492
1493 case XFS_IOC_GOINGDOWN: {
1494 __uint32_t in;
1495
1496 if (!capable(CAP_SYS_ADMIN))
1497 return -EPERM;
1498
1499 if (get_user(in, (__uint32_t __user *)arg))
1500 return -XFS_ERROR(EFAULT);
1501
1502 error = xfs_fs_goingdown(mp, in);
1503 return -error;
1504 }
1505
1506 case XFS_IOC_ERROR_INJECTION: {
1507 xfs_error_injection_t in;
1508
1509 if (!capable(CAP_SYS_ADMIN))
1510 return -EPERM;
1511
1512 if (copy_from_user(&in, arg, sizeof(in)))
1513 return -XFS_ERROR(EFAULT);
1514
1515 error = xfs_errortag_add(in.errtag, mp);
1516 return -error;
1517 }
1518
1519 case XFS_IOC_ERROR_CLEARALL:
1520 if (!capable(CAP_SYS_ADMIN))
1521 return -EPERM;
1522
1523 error = xfs_errortag_clearall(mp, 1);
1524 return -error;
1525
1526 default:
1527 return -ENOTTY;
1528 }
1529 }
Support for the Chinese Samsung S3C2440 based development boards