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FRV: Use generic show_interrupts()
[cris-mirror.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
blob0ca0e3c024d7bac3993707dd7309b3fda9664a07
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_alloc.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_dinode.h"
30 #include "xfs_inode.h"
31 #include "xfs_ioctl.h"
32 #include "xfs_rtalloc.h"
33 #include "xfs_itable.h"
34 #include "xfs_error.h"
35 #include "xfs_attr.h"
36 #include "xfs_bmap.h"
37 #include "xfs_buf_item.h"
38 #include "xfs_utils.h"
39 #include "xfs_dfrag.h"
40 #include "xfs_fsops.h"
41 #include "xfs_vnodeops.h"
42 #include "xfs_discard.h"
43 #include "xfs_quota.h"
44 #include "xfs_inode_item.h"
45 #include "xfs_export.h"
46 #include "xfs_trace.h"
47
48 #include <linux/capability.h>
49 #include <linux/dcache.h>
50 #include <linux/mount.h>
51 #include <linux/namei.h>
52 #include <linux/pagemap.h>
53 #include <linux/slab.h>
54 #include <linux/exportfs.h>
55
56 /*
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
59 *
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
66 */
67 int
68 xfs_find_handle(
69 unsigned int cmd,
70 xfs_fsop_handlereq_t *hreq)
71 {
72 int hsize;
73 xfs_handle_t handle;
74 struct inode *inode;
75 struct file *file = NULL;
76 struct path path;
77 int error;
78 struct xfs_inode *ip;
79
80 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 file = fget(hreq->fd);
82 if (!file)
83 return -EBADF;
84 inode = file->f_path.dentry->d_inode;
85 } else {
86 error = user_lpath((const char __user *)hreq->path, &path);
87 if (error)
88 return error;
89 inode = path.dentry->d_inode;
90 }
91 ip = XFS_I(inode);
92
93 /*
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
96 */
97 error = -EINVAL;
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 goto out_put;
100
101 error = -EBADF;
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
105 goto out_put;
106
107
108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109
110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 /*
112 * This handle only contains an fsid, zero the rest.
113 */
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
116 } else {
117 int lock_mode;
118
119 lock_mode = xfs_ilock_map_shared(ip);
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 xfs_iunlock_map_shared(ip, lock_mode);
126
127 hsize = XFS_HSIZE(handle);
128 }
129
130 error = -EFAULT;
131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
133 goto out_put;
134
135 error = 0;
136
137 out_put:
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 fput(file);
140 else
141 path_put(&path);
142 return error;
143 }
144
145 /*
146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
148 */
149 STATIC int
150 xfs_handle_acceptable(
151 void *context,
152 struct dentry *dentry)
153 {
154 return 1;
155 }
156
157 /*
158 * Convert userspace handle data into a dentry.
159 */
160 struct dentry *
161 xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
164 u32 hlen)
165 {
166 xfs_handle_t handle;
167 struct xfs_fid64 fid;
168
169 /*
170 * Only allow handle opens under a directory.
171 */
172 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
173 return ERR_PTR(-ENOTDIR);
174
175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
182
183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
186
187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
190 }
191
192 STATIC struct dentry *
193 xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196 {
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
198 }
199
200 int
201 xfs_open_by_handle(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
204 {
205 const struct cred *cred = current_cred();
206 int error;
207 int fd;
208 int permflag;
209 struct file *filp;
210 struct inode *inode;
211 struct dentry *dentry;
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 /* Put open permission in namei format. */
232 permflag = hreq->oflags;
233 if ((permflag+1) & O_ACCMODE)
234 permflag++;
235 if (permflag & O_TRUNC)
236 permflag |= 2;
237
238 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
239 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
240 error = -XFS_ERROR(EPERM);
241 goto out_dput;
242 }
243
244 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
245 error = -XFS_ERROR(EACCES);
246 goto out_dput;
247 }
248
249 /* Can't write directories. */
250 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
251 error = -XFS_ERROR(EISDIR);
252 goto out_dput;
253 }
254
255 fd = get_unused_fd();
256 if (fd < 0) {
257 error = fd;
258 goto out_dput;
259 }
260
261 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
262 hreq->oflags, cred);
263 if (IS_ERR(filp)) {
264 put_unused_fd(fd);
265 return PTR_ERR(filp);
266 }
267
268 if (inode->i_mode & S_IFREG) {
269 filp->f_flags |= O_NOATIME;
270 filp->f_mode |= FMODE_NOCMTIME;
271 }
272
273 fd_install(fd, filp);
274 return fd;
275
276 out_dput:
277 dput(dentry);
278 return error;
279 }
280
281 /*
282 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
283 * unused first argument.
284 */
285 STATIC int
286 do_readlink(
287 char __user *buffer,
288 int buflen,
289 const char *link)
290 {
291 int len;
292
293 len = PTR_ERR(link);
294 if (IS_ERR(link))
295 goto out;
296
297 len = strlen(link);
298 if (len > (unsigned) buflen)
299 len = buflen;
300 if (copy_to_user(buffer, link, len))
301 len = -EFAULT;
302 out:
303 return len;
304 }
305
306
307 int
308 xfs_readlink_by_handle(
309 struct file *parfilp,
310 xfs_fsop_handlereq_t *hreq)
311 {
312 struct dentry *dentry;
313 __u32 olen;
314 void *link;
315 int error;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -XFS_ERROR(EPERM);
319
320 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
321 if (IS_ERR(dentry))
322 return PTR_ERR(dentry);
323
324 /* Restrict this handle operation to symlinks only. */
325 if (!S_ISLNK(dentry->d_inode->i_mode)) {
326 error = -XFS_ERROR(EINVAL);
327 goto out_dput;
328 }
329
330 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
331 error = -XFS_ERROR(EFAULT);
332 goto out_dput;
333 }
334
335 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
336 if (!link) {
337 error = -XFS_ERROR(ENOMEM);
338 goto out_dput;
339 }
340
341 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
342 if (error)
343 goto out_kfree;
344 error = do_readlink(hreq->ohandle, olen, link);
345 if (error)
346 goto out_kfree;
347
348 out_kfree:
349 kfree(link);
350 out_dput:
351 dput(dentry);
352 return error;
353 }
354
355 STATIC int
356 xfs_fssetdm_by_handle(
357 struct file *parfilp,
358 void __user *arg)
359 {
360 int error;
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
363 struct dentry *dentry;
364
365 if (!capable(CAP_MKNOD))
366 return -XFS_ERROR(EPERM);
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 return -XFS_ERROR(EFAULT);
369
370 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
371 if (IS_ERR(dentry))
372 return PTR_ERR(dentry);
373
374 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
375 error = -XFS_ERROR(EPERM);
376 goto out;
377 }
378
379 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
380 error = -XFS_ERROR(EFAULT);
381 goto out;
382 }
383
384 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
385 fsd.fsd_dmstate);
386
387 out:
388 dput(dentry);
389 return error;
390 }
391
392 STATIC int
393 xfs_attrlist_by_handle(
394 struct file *parfilp,
395 void __user *arg)
396 {
397 int error = -ENOMEM;
398 attrlist_cursor_kern_t *cursor;
399 xfs_fsop_attrlist_handlereq_t al_hreq;
400 struct dentry *dentry;
401 char *kbuf;
402
403 if (!capable(CAP_SYS_ADMIN))
404 return -XFS_ERROR(EPERM);
405 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
406 return -XFS_ERROR(EFAULT);
407 if (al_hreq.buflen > XATTR_LIST_MAX)
408 return -XFS_ERROR(EINVAL);
409
410 /*
411 * Reject flags, only allow namespaces.
412 */
413 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
414 return -XFS_ERROR(EINVAL);
415
416 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
417 if (IS_ERR(dentry))
418 return PTR_ERR(dentry);
419
420 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
421 if (!kbuf)
422 goto out_dput;
423
424 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
425 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
426 al_hreq.flags, cursor);
427 if (error)
428 goto out_kfree;
429
430 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
431 error = -EFAULT;
432
433 out_kfree:
434 kfree(kbuf);
435 out_dput:
436 dput(dentry);
437 return error;
438 }
439
440 int
441 xfs_attrmulti_attr_get(
442 struct inode *inode,
443 unsigned char *name,
444 unsigned char __user *ubuf,
445 __uint32_t *len,
446 __uint32_t flags)
447 {
448 unsigned char *kbuf;
449 int error = EFAULT;
450
451 if (*len > XATTR_SIZE_MAX)
452 return EINVAL;
453 kbuf = kmalloc(*len, GFP_KERNEL);
454 if (!kbuf)
455 return ENOMEM;
456
457 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
458 if (error)
459 goto out_kfree;
460
461 if (copy_to_user(ubuf, kbuf, *len))
462 error = EFAULT;
463
464 out_kfree:
465 kfree(kbuf);
466 return error;
467 }
468
469 int
470 xfs_attrmulti_attr_set(
471 struct inode *inode,
472 unsigned char *name,
473 const unsigned char __user *ubuf,
474 __uint32_t len,
475 __uint32_t flags)
476 {
477 unsigned char *kbuf;
478 int error = EFAULT;
479
480 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
481 return EPERM;
482 if (len > XATTR_SIZE_MAX)
483 return EINVAL;
484
485 kbuf = memdup_user(ubuf, len);
486 if (IS_ERR(kbuf))
487 return PTR_ERR(kbuf);
488
489 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
490
491 return error;
492 }
493
494 int
495 xfs_attrmulti_attr_remove(
496 struct inode *inode,
497 unsigned char *name,
498 __uint32_t flags)
499 {
500 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
501 return EPERM;
502 return xfs_attr_remove(XFS_I(inode), name, flags);
503 }
504
505 STATIC int
506 xfs_attrmulti_by_handle(
507 struct file *parfilp,
508 void __user *arg)
509 {
510 int error;
511 xfs_attr_multiop_t *ops;
512 xfs_fsop_attrmulti_handlereq_t am_hreq;
513 struct dentry *dentry;
514 unsigned int i, size;
515 unsigned char *attr_name;
516
517 if (!capable(CAP_SYS_ADMIN))
518 return -XFS_ERROR(EPERM);
519 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
520 return -XFS_ERROR(EFAULT);
521
522 /* overflow check */
523 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
524 return -E2BIG;
525
526 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
527 if (IS_ERR(dentry))
528 return PTR_ERR(dentry);
529
530 error = E2BIG;
531 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
532 if (!size || size > 16 * PAGE_SIZE)
533 goto out_dput;
534
535 ops = memdup_user(am_hreq.ops, size);
536 if (IS_ERR(ops)) {
537 error = PTR_ERR(ops);
538 goto out_dput;
539 }
540
541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
542 if (!attr_name)
543 goto out_kfree_ops;
544
545 error = 0;
546 for (i = 0; i < am_hreq.opcount; i++) {
547 ops[i].am_error = strncpy_from_user((char *)attr_name,
548 ops[i].am_attrname, MAXNAMELEN);
549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
550 error = -ERANGE;
551 if (ops[i].am_error < 0)
552 break;
553
554 switch (ops[i].am_opcode) {
555 case ATTR_OP_GET:
556 ops[i].am_error = xfs_attrmulti_attr_get(
557 dentry->d_inode, attr_name,
558 ops[i].am_attrvalue, &ops[i].am_length,
559 ops[i].am_flags);
560 break;
561 case ATTR_OP_SET:
562 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
563 if (ops[i].am_error)
564 break;
565 ops[i].am_error = xfs_attrmulti_attr_set(
566 dentry->d_inode, attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
568 ops[i].am_flags);
569 mnt_drop_write(parfilp->f_path.mnt);
570 break;
571 case ATTR_OP_REMOVE:
572 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
573 if (ops[i].am_error)
574 break;
575 ops[i].am_error = xfs_attrmulti_attr_remove(
576 dentry->d_inode, attr_name,
577 ops[i].am_flags);
578 mnt_drop_write(parfilp->f_path.mnt);
579 break;
580 default:
581 ops[i].am_error = EINVAL;
582 }
583 }
584
585 if (copy_to_user(am_hreq.ops, ops, size))
586 error = XFS_ERROR(EFAULT);
587
588 kfree(attr_name);
589 out_kfree_ops:
590 kfree(ops);
591 out_dput:
592 dput(dentry);
593 return -error;
594 }
595
596 int
597 xfs_ioc_space(
598 struct xfs_inode *ip,
599 struct inode *inode,
600 struct file *filp,
601 int ioflags,
602 unsigned int cmd,
603 xfs_flock64_t *bf)
604 {
605 int attr_flags = 0;
606 int error;
607
608 /*
609 * Only allow the sys admin to reserve space unless
610 * unwritten extents are enabled.
611 */
612 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
613 !capable(CAP_SYS_ADMIN))
614 return -XFS_ERROR(EPERM);
615
616 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
617 return -XFS_ERROR(EPERM);
618
619 if (!(filp->f_mode & FMODE_WRITE))
620 return -XFS_ERROR(EBADF);
621
622 if (!S_ISREG(inode->i_mode))
623 return -XFS_ERROR(EINVAL);
624
625 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
626 attr_flags |= XFS_ATTR_NONBLOCK;
627 if (ioflags & IO_INVIS)
628 attr_flags |= XFS_ATTR_DMI;
629
630 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
631 return -error;
632 }
633
634 STATIC int
635 xfs_ioc_bulkstat(
636 xfs_mount_t *mp,
637 unsigned int cmd,
638 void __user *arg)
639 {
640 xfs_fsop_bulkreq_t bulkreq;
641 int count; /* # of records returned */
642 xfs_ino_t inlast; /* last inode number */
643 int done;
644 int error;
645
646 /* done = 1 if there are more stats to get and if bulkstat */
647 /* should be called again (unused here, but used in dmapi) */
648
649 if (!capable(CAP_SYS_ADMIN))
650 return -EPERM;
651
652 if (XFS_FORCED_SHUTDOWN(mp))
653 return -XFS_ERROR(EIO);
654
655 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
656 return -XFS_ERROR(EFAULT);
657
658 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
659 return -XFS_ERROR(EFAULT);
660
661 if ((count = bulkreq.icount) <= 0)
662 return -XFS_ERROR(EINVAL);
663
664 if (bulkreq.ubuffer == NULL)
665 return -XFS_ERROR(EINVAL);
666
667 if (cmd == XFS_IOC_FSINUMBERS)
668 error = xfs_inumbers(mp, &inlast, &count,
669 bulkreq.ubuffer, xfs_inumbers_fmt);
670 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
671 error = xfs_bulkstat_single(mp, &inlast,
672 bulkreq.ubuffer, &done);
673 else /* XFS_IOC_FSBULKSTAT */
674 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
675 sizeof(xfs_bstat_t), bulkreq.ubuffer,
676 &done);
677
678 if (error)
679 return -error;
680
681 if (bulkreq.ocount != NULL) {
682 if (copy_to_user(bulkreq.lastip, &inlast,
683 sizeof(xfs_ino_t)))
684 return -XFS_ERROR(EFAULT);
685
686 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
687 return -XFS_ERROR(EFAULT);
688 }
689
690 return 0;
691 }
692
693 STATIC int
694 xfs_ioc_fsgeometry_v1(
695 xfs_mount_t *mp,
696 void __user *arg)
697 {
698 xfs_fsop_geom_t fsgeo;
699 int error;
700
701 error = xfs_fs_geometry(mp, &fsgeo, 3);
702 if (error)
703 return -error;
704
705 /*
706 * Caller should have passed an argument of type
707 * xfs_fsop_geom_v1_t. This is a proper subset of the
708 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
709 */
710 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
711 return -XFS_ERROR(EFAULT);
712 return 0;
713 }
714
715 STATIC int
716 xfs_ioc_fsgeometry(
717 xfs_mount_t *mp,
718 void __user *arg)
719 {
720 xfs_fsop_geom_t fsgeo;
721 int error;
722
723 error = xfs_fs_geometry(mp, &fsgeo, 4);
724 if (error)
725 return -error;
726
727 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
728 return -XFS_ERROR(EFAULT);
729 return 0;
730 }
731
732 /*
733 * Linux extended inode flags interface.
734 */
735
736 STATIC unsigned int
737 xfs_merge_ioc_xflags(
738 unsigned int flags,
739 unsigned int start)
740 {
741 unsigned int xflags = start;
742
743 if (flags & FS_IMMUTABLE_FL)
744 xflags |= XFS_XFLAG_IMMUTABLE;
745 else
746 xflags &= ~XFS_XFLAG_IMMUTABLE;
747 if (flags & FS_APPEND_FL)
748 xflags |= XFS_XFLAG_APPEND;
749 else
750 xflags &= ~XFS_XFLAG_APPEND;
751 if (flags & FS_SYNC_FL)
752 xflags |= XFS_XFLAG_SYNC;
753 else
754 xflags &= ~XFS_XFLAG_SYNC;
755 if (flags & FS_NOATIME_FL)
756 xflags |= XFS_XFLAG_NOATIME;
757 else
758 xflags &= ~XFS_XFLAG_NOATIME;
759 if (flags & FS_NODUMP_FL)
760 xflags |= XFS_XFLAG_NODUMP;
761 else
762 xflags &= ~XFS_XFLAG_NODUMP;
763
764 return xflags;
765 }
766
767 STATIC unsigned int
768 xfs_di2lxflags(
769 __uint16_t di_flags)
770 {
771 unsigned int flags = 0;
772
773 if (di_flags & XFS_DIFLAG_IMMUTABLE)
774 flags |= FS_IMMUTABLE_FL;
775 if (di_flags & XFS_DIFLAG_APPEND)
776 flags |= FS_APPEND_FL;
777 if (di_flags & XFS_DIFLAG_SYNC)
778 flags |= FS_SYNC_FL;
779 if (di_flags & XFS_DIFLAG_NOATIME)
780 flags |= FS_NOATIME_FL;
781 if (di_flags & XFS_DIFLAG_NODUMP)
782 flags |= FS_NODUMP_FL;
783 return flags;
784 }
785
786 STATIC int
787 xfs_ioc_fsgetxattr(
788 xfs_inode_t *ip,
789 int attr,
790 void __user *arg)
791 {
792 struct fsxattr fa;
793
794 memset(&fa, 0, sizeof(struct fsxattr));
795
796 xfs_ilock(ip, XFS_ILOCK_SHARED);
797 fa.fsx_xflags = xfs_ip2xflags(ip);
798 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
799 fa.fsx_projid = xfs_get_projid(ip);
800
801 if (attr) {
802 if (ip->i_afp) {
803 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
804 fa.fsx_nextents = ip->i_afp->if_bytes /
805 sizeof(xfs_bmbt_rec_t);
806 else
807 fa.fsx_nextents = ip->i_d.di_anextents;
808 } else
809 fa.fsx_nextents = 0;
810 } else {
811 if (ip->i_df.if_flags & XFS_IFEXTENTS)
812 fa.fsx_nextents = ip->i_df.if_bytes /
813 sizeof(xfs_bmbt_rec_t);
814 else
815 fa.fsx_nextents = ip->i_d.di_nextents;
816 }
817 xfs_iunlock(ip, XFS_ILOCK_SHARED);
818
819 if (copy_to_user(arg, &fa, sizeof(fa)))
820 return -EFAULT;
821 return 0;
822 }
823
824 STATIC void
825 xfs_set_diflags(
826 struct xfs_inode *ip,
827 unsigned int xflags)
828 {
829 unsigned int di_flags;
830
831 /* can't set PREALLOC this way, just preserve it */
832 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
833 if (xflags & XFS_XFLAG_IMMUTABLE)
834 di_flags |= XFS_DIFLAG_IMMUTABLE;
835 if (xflags & XFS_XFLAG_APPEND)
836 di_flags |= XFS_DIFLAG_APPEND;
837 if (xflags & XFS_XFLAG_SYNC)
838 di_flags |= XFS_DIFLAG_SYNC;
839 if (xflags & XFS_XFLAG_NOATIME)
840 di_flags |= XFS_DIFLAG_NOATIME;
841 if (xflags & XFS_XFLAG_NODUMP)
842 di_flags |= XFS_DIFLAG_NODUMP;
843 if (xflags & XFS_XFLAG_PROJINHERIT)
844 di_flags |= XFS_DIFLAG_PROJINHERIT;
845 if (xflags & XFS_XFLAG_NODEFRAG)
846 di_flags |= XFS_DIFLAG_NODEFRAG;
847 if (xflags & XFS_XFLAG_FILESTREAM)
848 di_flags |= XFS_DIFLAG_FILESTREAM;
849 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
850 if (xflags & XFS_XFLAG_RTINHERIT)
851 di_flags |= XFS_DIFLAG_RTINHERIT;
852 if (xflags & XFS_XFLAG_NOSYMLINKS)
853 di_flags |= XFS_DIFLAG_NOSYMLINKS;
854 if (xflags & XFS_XFLAG_EXTSZINHERIT)
855 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
856 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
857 if (xflags & XFS_XFLAG_REALTIME)
858 di_flags |= XFS_DIFLAG_REALTIME;
859 if (xflags & XFS_XFLAG_EXTSIZE)
860 di_flags |= XFS_DIFLAG_EXTSIZE;
861 }
862
863 ip->i_d.di_flags = di_flags;
864 }
865
866 STATIC void
867 xfs_diflags_to_linux(
868 struct xfs_inode *ip)
869 {
870 struct inode *inode = VFS_I(ip);
871 unsigned int xflags = xfs_ip2xflags(ip);
872
873 if (xflags & XFS_XFLAG_IMMUTABLE)
874 inode->i_flags |= S_IMMUTABLE;
875 else
876 inode->i_flags &= ~S_IMMUTABLE;
877 if (xflags & XFS_XFLAG_APPEND)
878 inode->i_flags |= S_APPEND;
879 else
880 inode->i_flags &= ~S_APPEND;
881 if (xflags & XFS_XFLAG_SYNC)
882 inode->i_flags |= S_SYNC;
883 else
884 inode->i_flags &= ~S_SYNC;
885 if (xflags & XFS_XFLAG_NOATIME)
886 inode->i_flags |= S_NOATIME;
887 else
888 inode->i_flags &= ~S_NOATIME;
889 }
890
891 #define FSX_PROJID 1
892 #define FSX_EXTSIZE 2
893 #define FSX_XFLAGS 4
894 #define FSX_NONBLOCK 8
895
896 STATIC int
897 xfs_ioctl_setattr(
898 xfs_inode_t *ip,
899 struct fsxattr *fa,
900 int mask)
901 {
902 struct xfs_mount *mp = ip->i_mount;
903 struct xfs_trans *tp;
904 unsigned int lock_flags = 0;
905 struct xfs_dquot *udqp = NULL;
906 struct xfs_dquot *gdqp = NULL;
907 struct xfs_dquot *olddquot = NULL;
908 int code;
909
910 trace_xfs_ioctl_setattr(ip);
911
912 if (mp->m_flags & XFS_MOUNT_RDONLY)
913 return XFS_ERROR(EROFS);
914 if (XFS_FORCED_SHUTDOWN(mp))
915 return XFS_ERROR(EIO);
916
917 /*
918 * Disallow 32bit project ids when projid32bit feature is not enabled.
919 */
920 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
921 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
922 return XFS_ERROR(EINVAL);
923
924 /*
925 * If disk quotas is on, we make sure that the dquots do exist on disk,
926 * before we start any other transactions. Trying to do this later
927 * is messy. We don't care to take a readlock to look at the ids
928 * in inode here, because we can't hold it across the trans_reserve.
929 * If the IDs do change before we take the ilock, we're covered
930 * because the i_*dquot fields will get updated anyway.
931 */
932 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
933 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
934 ip->i_d.di_gid, fa->fsx_projid,
935 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
936 if (code)
937 return code;
938 }
939
940 /*
941 * For the other attributes, we acquire the inode lock and
942 * first do an error checking pass.
943 */
944 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
945 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
946 if (code)
947 goto error_return;
948
949 lock_flags = XFS_ILOCK_EXCL;
950 xfs_ilock(ip, lock_flags);
951
952 /*
953 * CAP_FOWNER overrides the following restrictions:
954 *
955 * The user ID of the calling process must be equal
956 * to the file owner ID, except in cases where the
957 * CAP_FSETID capability is applicable.
958 */
959 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
960 code = XFS_ERROR(EPERM);
961 goto error_return;
962 }
963
964 /*
965 * Do a quota reservation only if projid is actually going to change.
966 */
967 if (mask & FSX_PROJID) {
968 if (XFS_IS_QUOTA_RUNNING(mp) &&
969 XFS_IS_PQUOTA_ON(mp) &&
970 xfs_get_projid(ip) != fa->fsx_projid) {
971 ASSERT(tp);
972 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
973 capable(CAP_FOWNER) ?
974 XFS_QMOPT_FORCE_RES : 0);
975 if (code) /* out of quota */
976 goto error_return;
977 }
978 }
979
980 if (mask & FSX_EXTSIZE) {
981 /*
982 * Can't change extent size if any extents are allocated.
983 */
984 if (ip->i_d.di_nextents &&
985 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
986 fa->fsx_extsize)) {
987 code = XFS_ERROR(EINVAL); /* EFBIG? */
988 goto error_return;
989 }
990
991 /*
992 * Extent size must be a multiple of the appropriate block
993 * size, if set at all. It must also be smaller than the
994 * maximum extent size supported by the filesystem.
995 *
996 * Also, for non-realtime files, limit the extent size hint to
997 * half the size of the AGs in the filesystem so alignment
998 * doesn't result in extents larger than an AG.
999 */
1000 if (fa->fsx_extsize != 0) {
1001 xfs_extlen_t size;
1002 xfs_fsblock_t extsize_fsb;
1003
1004 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1005 if (extsize_fsb > MAXEXTLEN) {
1006 code = XFS_ERROR(EINVAL);
1007 goto error_return;
1008 }
1009
1010 if (XFS_IS_REALTIME_INODE(ip) ||
1011 ((mask & FSX_XFLAGS) &&
1012 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1013 size = mp->m_sb.sb_rextsize <<
1014 mp->m_sb.sb_blocklog;
1015 } else {
1016 size = mp->m_sb.sb_blocksize;
1017 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1018 code = XFS_ERROR(EINVAL);
1019 goto error_return;
1020 }
1021 }
1022
1023 if (fa->fsx_extsize % size) {
1024 code = XFS_ERROR(EINVAL);
1025 goto error_return;
1026 }
1027 }
1028 }
1029
1030
1031 if (mask & FSX_XFLAGS) {
1032 /*
1033 * Can't change realtime flag if any extents are allocated.
1034 */
1035 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1036 (XFS_IS_REALTIME_INODE(ip)) !=
1037 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1038 code = XFS_ERROR(EINVAL); /* EFBIG? */
1039 goto error_return;
1040 }
1041
1042 /*
1043 * If realtime flag is set then must have realtime data.
1044 */
1045 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1046 if ((mp->m_sb.sb_rblocks == 0) ||
1047 (mp->m_sb.sb_rextsize == 0) ||
1048 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1049 code = XFS_ERROR(EINVAL);
1050 goto error_return;
1051 }
1052 }
1053
1054 /*
1055 * Can't modify an immutable/append-only file unless
1056 * we have appropriate permission.
1057 */
1058 if ((ip->i_d.di_flags &
1059 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1060 (fa->fsx_xflags &
1061 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1062 !capable(CAP_LINUX_IMMUTABLE)) {
1063 code = XFS_ERROR(EPERM);
1064 goto error_return;
1065 }
1066 }
1067
1068 xfs_trans_ijoin(tp, ip);
1069
1070 /*
1071 * Change file ownership. Must be the owner or privileged.
1072 */
1073 if (mask & FSX_PROJID) {
1074 /*
1075 * CAP_FSETID overrides the following restrictions:
1076 *
1077 * The set-user-ID and set-group-ID bits of a file will be
1078 * cleared upon successful return from chown()
1079 */
1080 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1081 !capable(CAP_FSETID))
1082 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1083
1084 /*
1085 * Change the ownerships and register quota modifications
1086 * in the transaction.
1087 */
1088 if (xfs_get_projid(ip) != fa->fsx_projid) {
1089 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1090 olddquot = xfs_qm_vop_chown(tp, ip,
1091 &ip->i_gdquot, gdqp);
1092 }
1093 xfs_set_projid(ip, fa->fsx_projid);
1094
1095 /*
1096 * We may have to rev the inode as well as
1097 * the superblock version number since projids didn't
1098 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1099 */
1100 if (ip->i_d.di_version == 1)
1101 xfs_bump_ino_vers2(tp, ip);
1102 }
1103
1104 }
1105
1106 if (mask & FSX_EXTSIZE)
1107 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1108 if (mask & FSX_XFLAGS) {
1109 xfs_set_diflags(ip, fa->fsx_xflags);
1110 xfs_diflags_to_linux(ip);
1111 }
1112
1113 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1114 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1115
1116 XFS_STATS_INC(xs_ig_attrchg);
1117
1118 /*
1119 * If this is a synchronous mount, make sure that the
1120 * transaction goes to disk before returning to the user.
1121 * This is slightly sub-optimal in that truncates require
1122 * two sync transactions instead of one for wsync filesystems.
1123 * One for the truncate and one for the timestamps since we
1124 * don't want to change the timestamps unless we're sure the
1125 * truncate worked. Truncates are less than 1% of the laddis
1126 * mix so this probably isn't worth the trouble to optimize.
1127 */
1128 if (mp->m_flags & XFS_MOUNT_WSYNC)
1129 xfs_trans_set_sync(tp);
1130 code = xfs_trans_commit(tp, 0);
1131 xfs_iunlock(ip, lock_flags);
1132
1133 /*
1134 * Release any dquot(s) the inode had kept before chown.
1135 */
1136 xfs_qm_dqrele(olddquot);
1137 xfs_qm_dqrele(udqp);
1138 xfs_qm_dqrele(gdqp);
1139
1140 return code;
1141
1142 error_return:
1143 xfs_qm_dqrele(udqp);
1144 xfs_qm_dqrele(gdqp);
1145 xfs_trans_cancel(tp, 0);
1146 if (lock_flags)
1147 xfs_iunlock(ip, lock_flags);
1148 return code;
1149 }
1150
1151 STATIC int
1152 xfs_ioc_fssetxattr(
1153 xfs_inode_t *ip,
1154 struct file *filp,
1155 void __user *arg)
1156 {
1157 struct fsxattr fa;
1158 unsigned int mask;
1159
1160 if (copy_from_user(&fa, arg, sizeof(fa)))
1161 return -EFAULT;
1162
1163 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1164 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1165 mask |= FSX_NONBLOCK;
1166
1167 return -xfs_ioctl_setattr(ip, &fa, mask);
1168 }
1169
1170 STATIC int
1171 xfs_ioc_getxflags(
1172 xfs_inode_t *ip,
1173 void __user *arg)
1174 {
1175 unsigned int flags;
1176
1177 flags = xfs_di2lxflags(ip->i_d.di_flags);
1178 if (copy_to_user(arg, &flags, sizeof(flags)))
1179 return -EFAULT;
1180 return 0;
1181 }
1182
1183 STATIC int
1184 xfs_ioc_setxflags(
1185 xfs_inode_t *ip,
1186 struct file *filp,
1187 void __user *arg)
1188 {
1189 struct fsxattr fa;
1190 unsigned int flags;
1191 unsigned int mask;
1192
1193 if (copy_from_user(&flags, arg, sizeof(flags)))
1194 return -EFAULT;
1195
1196 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1197 FS_NOATIME_FL | FS_NODUMP_FL | \
1198 FS_SYNC_FL))
1199 return -EOPNOTSUPP;
1200
1201 mask = FSX_XFLAGS;
1202 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1203 mask |= FSX_NONBLOCK;
1204 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1205
1206 return -xfs_ioctl_setattr(ip, &fa, mask);
1207 }
1208
1209 STATIC int
1210 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1211 {
1212 struct getbmap __user *base = *ap;
1213
1214 /* copy only getbmap portion (not getbmapx) */
1215 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1216 return XFS_ERROR(EFAULT);
1217
1218 *ap += sizeof(struct getbmap);
1219 return 0;
1220 }
1221
1222 STATIC int
1223 xfs_ioc_getbmap(
1224 struct xfs_inode *ip,
1225 int ioflags,
1226 unsigned int cmd,
1227 void __user *arg)
1228 {
1229 struct getbmapx bmx;
1230 int error;
1231
1232 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1233 return -XFS_ERROR(EFAULT);
1234
1235 if (bmx.bmv_count < 2)
1236 return -XFS_ERROR(EINVAL);
1237
1238 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1239 if (ioflags & IO_INVIS)
1240 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1241
1242 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1243 (struct getbmap *)arg+1);
1244 if (error)
1245 return -error;
1246
1247 /* copy back header - only size of getbmap */
1248 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1249 return -XFS_ERROR(EFAULT);
1250 return 0;
1251 }
1252
1253 STATIC int
1254 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1255 {
1256 struct getbmapx __user *base = *ap;
1257
1258 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1259 return XFS_ERROR(EFAULT);
1260
1261 *ap += sizeof(struct getbmapx);
1262 return 0;
1263 }
1264
1265 STATIC int
1266 xfs_ioc_getbmapx(
1267 struct xfs_inode *ip,
1268 void __user *arg)
1269 {
1270 struct getbmapx bmx;
1271 int error;
1272
1273 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1274 return -XFS_ERROR(EFAULT);
1275
1276 if (bmx.bmv_count < 2)
1277 return -XFS_ERROR(EINVAL);
1278
1279 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1280 return -XFS_ERROR(EINVAL);
1281
1282 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1283 (struct getbmapx *)arg+1);
1284 if (error)
1285 return -error;
1286
1287 /* copy back header */
1288 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1289 return -XFS_ERROR(EFAULT);
1290
1291 return 0;
1292 }
1293
1294 /*
1295 * Note: some of the ioctl's return positive numbers as a
1296 * byte count indicating success, such as readlink_by_handle.
1297 * So we don't "sign flip" like most other routines. This means
1298 * true errors need to be returned as a negative value.
1299 */
1300 long
1301 xfs_file_ioctl(
1302 struct file *filp,
1303 unsigned int cmd,
1304 unsigned long p)
1305 {
1306 struct inode *inode = filp->f_path.dentry->d_inode;
1307 struct xfs_inode *ip = XFS_I(inode);
1308 struct xfs_mount *mp = ip->i_mount;
1309 void __user *arg = (void __user *)p;
1310 int ioflags = 0;
1311 int error;
1312
1313 if (filp->f_mode & FMODE_NOCMTIME)
1314 ioflags |= IO_INVIS;
1315
1316 trace_xfs_file_ioctl(ip);
1317
1318 switch (cmd) {
1319 case FITRIM:
1320 return xfs_ioc_trim(mp, arg);
1321 case XFS_IOC_ALLOCSP:
1322 case XFS_IOC_FREESP:
1323 case XFS_IOC_RESVSP:
1324 case XFS_IOC_UNRESVSP:
1325 case XFS_IOC_ALLOCSP64:
1326 case XFS_IOC_FREESP64:
1327 case XFS_IOC_RESVSP64:
1328 case XFS_IOC_UNRESVSP64:
1329 case XFS_IOC_ZERO_RANGE: {
1330 xfs_flock64_t bf;
1331
1332 if (copy_from_user(&bf, arg, sizeof(bf)))
1333 return -XFS_ERROR(EFAULT);
1334 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1335 }
1336 case XFS_IOC_DIOINFO: {
1337 struct dioattr da;
1338 xfs_buftarg_t *target =
1339 XFS_IS_REALTIME_INODE(ip) ?
1340 mp->m_rtdev_targp : mp->m_ddev_targp;
1341
1342 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1343 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1344
1345 if (copy_to_user(arg, &da, sizeof(da)))
1346 return -XFS_ERROR(EFAULT);
1347 return 0;
1348 }
1349
1350 case XFS_IOC_FSBULKSTAT_SINGLE:
1351 case XFS_IOC_FSBULKSTAT:
1352 case XFS_IOC_FSINUMBERS:
1353 return xfs_ioc_bulkstat(mp, cmd, arg);
1354
1355 case XFS_IOC_FSGEOMETRY_V1:
1356 return xfs_ioc_fsgeometry_v1(mp, arg);
1357
1358 case XFS_IOC_FSGEOMETRY:
1359 return xfs_ioc_fsgeometry(mp, arg);
1360
1361 case XFS_IOC_GETVERSION:
1362 return put_user(inode->i_generation, (int __user *)arg);
1363
1364 case XFS_IOC_FSGETXATTR:
1365 return xfs_ioc_fsgetxattr(ip, 0, arg);
1366 case XFS_IOC_FSGETXATTRA:
1367 return xfs_ioc_fsgetxattr(ip, 1, arg);
1368 case XFS_IOC_FSSETXATTR:
1369 return xfs_ioc_fssetxattr(ip, filp, arg);
1370 case XFS_IOC_GETXFLAGS:
1371 return xfs_ioc_getxflags(ip, arg);
1372 case XFS_IOC_SETXFLAGS:
1373 return xfs_ioc_setxflags(ip, filp, arg);
1374
1375 case XFS_IOC_FSSETDM: {
1376 struct fsdmidata dmi;
1377
1378 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1379 return -XFS_ERROR(EFAULT);
1380
1381 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1382 dmi.fsd_dmstate);
1383 return -error;
1384 }
1385
1386 case XFS_IOC_GETBMAP:
1387 case XFS_IOC_GETBMAPA:
1388 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1389
1390 case XFS_IOC_GETBMAPX:
1391 return xfs_ioc_getbmapx(ip, arg);
1392
1393 case XFS_IOC_FD_TO_HANDLE:
1394 case XFS_IOC_PATH_TO_HANDLE:
1395 case XFS_IOC_PATH_TO_FSHANDLE: {
1396 xfs_fsop_handlereq_t hreq;
1397
1398 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1399 return -XFS_ERROR(EFAULT);
1400 return xfs_find_handle(cmd, &hreq);
1401 }
1402 case XFS_IOC_OPEN_BY_HANDLE: {
1403 xfs_fsop_handlereq_t hreq;
1404
1405 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1406 return -XFS_ERROR(EFAULT);
1407 return xfs_open_by_handle(filp, &hreq);
1408 }
1409 case XFS_IOC_FSSETDM_BY_HANDLE:
1410 return xfs_fssetdm_by_handle(filp, arg);
1411
1412 case XFS_IOC_READLINK_BY_HANDLE: {
1413 xfs_fsop_handlereq_t hreq;
1414
1415 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1416 return -XFS_ERROR(EFAULT);
1417 return xfs_readlink_by_handle(filp, &hreq);
1418 }
1419 case XFS_IOC_ATTRLIST_BY_HANDLE:
1420 return xfs_attrlist_by_handle(filp, arg);
1421
1422 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1423 return xfs_attrmulti_by_handle(filp, arg);
1424
1425 case XFS_IOC_SWAPEXT: {
1426 struct xfs_swapext sxp;
1427
1428 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1429 return -XFS_ERROR(EFAULT);
1430 error = xfs_swapext(&sxp);
1431 return -error;
1432 }
1433
1434 case XFS_IOC_FSCOUNTS: {
1435 xfs_fsop_counts_t out;
1436
1437 error = xfs_fs_counts(mp, &out);
1438 if (error)
1439 return -error;
1440
1441 if (copy_to_user(arg, &out, sizeof(out)))
1442 return -XFS_ERROR(EFAULT);
1443 return 0;
1444 }
1445
1446 case XFS_IOC_SET_RESBLKS: {
1447 xfs_fsop_resblks_t inout;
1448 __uint64_t in;
1449
1450 if (!capable(CAP_SYS_ADMIN))
1451 return -EPERM;
1452
1453 if (mp->m_flags & XFS_MOUNT_RDONLY)
1454 return -XFS_ERROR(EROFS);
1455
1456 if (copy_from_user(&inout, arg, sizeof(inout)))
1457 return -XFS_ERROR(EFAULT);
1458
1459 /* input parameter is passed in resblks field of structure */
1460 in = inout.resblks;
1461 error = xfs_reserve_blocks(mp, &in, &inout);
1462 if (error)
1463 return -error;
1464
1465 if (copy_to_user(arg, &inout, sizeof(inout)))
1466 return -XFS_ERROR(EFAULT);
1467 return 0;
1468 }
1469
1470 case XFS_IOC_GET_RESBLKS: {
1471 xfs_fsop_resblks_t out;
1472
1473 if (!capable(CAP_SYS_ADMIN))
1474 return -EPERM;
1475
1476 error = xfs_reserve_blocks(mp, NULL, &out);
1477 if (error)
1478 return -error;
1479
1480 if (copy_to_user(arg, &out, sizeof(out)))
1481 return -XFS_ERROR(EFAULT);
1482
1483 return 0;
1484 }
1485
1486 case XFS_IOC_FSGROWFSDATA: {
1487 xfs_growfs_data_t in;
1488
1489 if (copy_from_user(&in, arg, sizeof(in)))
1490 return -XFS_ERROR(EFAULT);
1491
1492 error = xfs_growfs_data(mp, &in);
1493 return -error;
1494 }
1495
1496 case XFS_IOC_FSGROWFSLOG: {
1497 xfs_growfs_log_t in;
1498
1499 if (copy_from_user(&in, arg, sizeof(in)))
1500 return -XFS_ERROR(EFAULT);
1501
1502 error = xfs_growfs_log(mp, &in);
1503 return -error;
1504 }
1505
1506 case XFS_IOC_FSGROWFSRT: {
1507 xfs_growfs_rt_t in;
1508
1509 if (copy_from_user(&in, arg, sizeof(in)))
1510 return -XFS_ERROR(EFAULT);
1511
1512 error = xfs_growfs_rt(mp, &in);
1513 return -error;
1514 }
1515
1516 case XFS_IOC_GOINGDOWN: {
1517 __uint32_t in;
1518
1519 if (!capable(CAP_SYS_ADMIN))
1520 return -EPERM;
1521
1522 if (get_user(in, (__uint32_t __user *)arg))
1523 return -XFS_ERROR(EFAULT);
1524
1525 error = xfs_fs_goingdown(mp, in);
1526 return -error;
1527 }
1528
1529 case XFS_IOC_ERROR_INJECTION: {
1530 xfs_error_injection_t in;
1531
1532 if (!capable(CAP_SYS_ADMIN))
1533 return -EPERM;
1534
1535 if (copy_from_user(&in, arg, sizeof(in)))
1536 return -XFS_ERROR(EFAULT);
1537
1538 error = xfs_errortag_add(in.errtag, mp);
1539 return -error;
1540 }
1541
1542 case XFS_IOC_ERROR_CLEARALL:
1543 if (!capable(CAP_SYS_ADMIN))
1544 return -EPERM;
1545
1546 error = xfs_errortag_clearall(mp, 1);
1547 return -error;
1548
1549 default:
1550 return -ENOTTY;
1551 }
1552 }
CRIS linux kernel tree