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ALSA: seq: Fix missing NULL check at remove_events ioctl
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blob83dfe6e7323560a8501fffce91d31586185b58cd
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_log.h"
21 #include "xfs_trans.h"
22 #include "xfs_sb.h"
23 #include "xfs_ag.h"
24 #include "xfs_alloc.h"
25 #include "xfs_mount.h"
26 #include "xfs_bmap_btree.h"
27 #include "xfs_dinode.h"
28 #include "xfs_inode.h"
29 #include "xfs_ioctl.h"
30 #include "xfs_rtalloc.h"
31 #include "xfs_itable.h"
32 #include "xfs_error.h"
33 #include "xfs_attr.h"
34 #include "xfs_bmap.h"
35 #include "xfs_buf_item.h"
36 #include "xfs_utils.h"
37 #include "xfs_dfrag.h"
38 #include "xfs_fsops.h"
39 #include "xfs_vnodeops.h"
40 #include "xfs_discard.h"
41 #include "xfs_quota.h"
42 #include "xfs_inode_item.h"
43 #include "xfs_export.h"
44 #include "xfs_trace.h"
45 #include "xfs_icache.h"
46
47 #include <linux/capability.h>
48 #include <linux/dcache.h>
49 #include <linux/mount.h>
50 #include <linux/namei.h>
51 #include <linux/pagemap.h>
52 #include <linux/slab.h>
53 #include <linux/exportfs.h>
54
55 /*
56 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
57 * a file or fs handle.
58 *
59 * XFS_IOC_PATH_TO_FSHANDLE
60 * returns fs handle for a mount point or path within that mount point
61 * XFS_IOC_FD_TO_HANDLE
62 * returns full handle for a FD opened in user space
63 * XFS_IOC_PATH_TO_HANDLE
64 * returns full handle for a path
65 */
66 int
67 xfs_find_handle(
68 unsigned int cmd,
69 xfs_fsop_handlereq_t *hreq)
70 {
71 int hsize;
72 xfs_handle_t handle;
73 struct inode *inode;
74 struct fd f = {0};
75 struct path path;
76 int error;
77 struct xfs_inode *ip;
78
79 if (cmd == XFS_IOC_FD_TO_HANDLE) {
80 f = fdget(hreq->fd);
81 if (!f.file)
82 return -EBADF;
83 inode = file_inode(f.file);
84 } else {
85 error = user_lpath((const char __user *)hreq->path, &path);
86 if (error)
87 return error;
88 inode = path.dentry->d_inode;
89 }
90 ip = XFS_I(inode);
91
92 /*
93 * We can only generate handles for inodes residing on a XFS filesystem,
94 * and only for regular files, directories or symbolic links.
95 */
96 error = -EINVAL;
97 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
98 goto out_put;
99
100 error = -EBADF;
101 if (!S_ISREG(inode->i_mode) &&
102 !S_ISDIR(inode->i_mode) &&
103 !S_ISLNK(inode->i_mode))
104 goto out_put;
105
106
107 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
108
109 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
110 /*
111 * This handle only contains an fsid, zero the rest.
112 */
113 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
114 hsize = sizeof(xfs_fsid_t);
115 } else {
116 int lock_mode;
117
118 lock_mode = xfs_ilock_map_shared(ip);
119 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
120 sizeof(handle.ha_fid.fid_len);
121 handle.ha_fid.fid_pad = 0;
122 handle.ha_fid.fid_gen = ip->i_d.di_gen;
123 handle.ha_fid.fid_ino = ip->i_ino;
124 xfs_iunlock_map_shared(ip, lock_mode);
125
126 hsize = XFS_HSIZE(handle);
127 }
128
129 error = -EFAULT;
130 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
131 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
132 goto out_put;
133
134 error = 0;
135
136 out_put:
137 if (cmd == XFS_IOC_FD_TO_HANDLE)
138 fdput(f);
139 else
140 path_put(&path);
141 return error;
142 }
143
144 /*
145 * No need to do permission checks on the various pathname components
146 * as the handle operations are privileged.
147 */
148 STATIC int
149 xfs_handle_acceptable(
150 void *context,
151 struct dentry *dentry)
152 {
153 return 1;
154 }
155
156 /*
157 * Convert userspace handle data into a dentry.
158 */
159 struct dentry *
160 xfs_handle_to_dentry(
161 struct file *parfilp,
162 void __user *uhandle,
163 u32 hlen)
164 {
165 xfs_handle_t handle;
166 struct xfs_fid64 fid;
167
168 /*
169 * Only allow handle opens under a directory.
170 */
171 if (!S_ISDIR(file_inode(parfilp)->i_mode))
172 return ERR_PTR(-ENOTDIR);
173
174 if (hlen != sizeof(xfs_handle_t))
175 return ERR_PTR(-EINVAL);
176 if (copy_from_user(&handle, uhandle, hlen))
177 return ERR_PTR(-EFAULT);
178 if (handle.ha_fid.fid_len !=
179 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
180 return ERR_PTR(-EINVAL);
181
182 memset(&fid, 0, sizeof(struct fid));
183 fid.ino = handle.ha_fid.fid_ino;
184 fid.gen = handle.ha_fid.fid_gen;
185
186 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
187 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
188 xfs_handle_acceptable, NULL);
189 }
190
191 STATIC struct dentry *
192 xfs_handlereq_to_dentry(
193 struct file *parfilp,
194 xfs_fsop_handlereq_t *hreq)
195 {
196 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
197 }
198
199 int
200 xfs_open_by_handle(
201 struct file *parfilp,
202 xfs_fsop_handlereq_t *hreq)
203 {
204 const struct cred *cred = current_cred();
205 int error;
206 int fd;
207 int permflag;
208 struct file *filp;
209 struct inode *inode;
210 struct dentry *dentry;
211 fmode_t fmode;
212 struct path path;
213
214 if (!capable(CAP_SYS_ADMIN))
215 return -XFS_ERROR(EPERM);
216
217 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 if (IS_ERR(dentry))
219 return PTR_ERR(dentry);
220 inode = dentry->d_inode;
221
222 /* Restrict xfs_open_by_handle to directories & regular files. */
223 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
224 error = -XFS_ERROR(EPERM);
225 goto out_dput;
226 }
227
228 #if BITS_PER_LONG != 32
229 hreq->oflags |= O_LARGEFILE;
230 #endif
231
232 permflag = hreq->oflags;
233 fmode = OPEN_FMODE(permflag);
234 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
235 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
236 error = -XFS_ERROR(EPERM);
237 goto out_dput;
238 }
239
240 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
241 error = -XFS_ERROR(EACCES);
242 goto out_dput;
243 }
244
245 /* Can't write directories. */
246 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
247 error = -XFS_ERROR(EISDIR);
248 goto out_dput;
249 }
250
251 fd = get_unused_fd();
252 if (fd < 0) {
253 error = fd;
254 goto out_dput;
255 }
256
257 path.mnt = parfilp->f_path.mnt;
258 path.dentry = dentry;
259 filp = dentry_open(&path, hreq->oflags, cred);
260 dput(dentry);
261 if (IS_ERR(filp)) {
262 put_unused_fd(fd);
263 return PTR_ERR(filp);
264 }
265
266 if (S_ISREG(inode->i_mode)) {
267 filp->f_flags |= O_NOATIME;
268 filp->f_mode |= FMODE_NOCMTIME;
269 }
270
271 fd_install(fd, filp);
272 return fd;
273
274 out_dput:
275 dput(dentry);
276 return error;
277 }
278
279 /*
280 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
281 * unused first argument.
282 */
283 STATIC int
284 do_readlink(
285 char __user *buffer,
286 int buflen,
287 const char *link)
288 {
289 int len;
290
291 len = PTR_ERR(link);
292 if (IS_ERR(link))
293 goto out;
294
295 len = strlen(link);
296 if (len > (unsigned) buflen)
297 len = buflen;
298 if (copy_to_user(buffer, link, len))
299 len = -EFAULT;
300 out:
301 return len;
302 }
303
304
305 int
306 xfs_readlink_by_handle(
307 struct file *parfilp,
308 xfs_fsop_handlereq_t *hreq)
309 {
310 struct dentry *dentry;
311 __u32 olen;
312 void *link;
313 int error;
314
315 if (!capable(CAP_SYS_ADMIN))
316 return -XFS_ERROR(EPERM);
317
318 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
319 if (IS_ERR(dentry))
320 return PTR_ERR(dentry);
321
322 /* Restrict this handle operation to symlinks only. */
323 if (!S_ISLNK(dentry->d_inode->i_mode)) {
324 error = -XFS_ERROR(EINVAL);
325 goto out_dput;
326 }
327
328 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
329 error = -XFS_ERROR(EFAULT);
330 goto out_dput;
331 }
332
333 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
334 if (!link) {
335 error = -XFS_ERROR(ENOMEM);
336 goto out_dput;
337 }
338
339 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
340 if (error)
341 goto out_kfree;
342 error = do_readlink(hreq->ohandle, olen, link);
343 if (error)
344 goto out_kfree;
345
346 out_kfree:
347 kfree(link);
348 out_dput:
349 dput(dentry);
350 return error;
351 }
352
353 STATIC int
354 xfs_fssetdm_by_handle(
355 struct file *parfilp,
356 void __user *arg)
357 {
358 int error;
359 struct fsdmidata fsd;
360 xfs_fsop_setdm_handlereq_t dmhreq;
361 struct dentry *dentry;
362
363 if (!capable(CAP_MKNOD))
364 return -XFS_ERROR(EPERM);
365 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
366 return -XFS_ERROR(EFAULT);
367
368 error = mnt_want_write_file(parfilp);
369 if (error)
370 return error;
371
372 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
373 if (IS_ERR(dentry)) {
374 mnt_drop_write_file(parfilp);
375 return PTR_ERR(dentry);
376 }
377
378 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
379 error = -XFS_ERROR(EPERM);
380 goto out;
381 }
382
383 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
384 error = -XFS_ERROR(EFAULT);
385 goto out;
386 }
387
388 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
389 fsd.fsd_dmstate);
390
391 out:
392 mnt_drop_write_file(parfilp);
393 dput(dentry);
394 return error;
395 }
396
397 STATIC int
398 xfs_attrlist_by_handle(
399 struct file *parfilp,
400 void __user *arg)
401 {
402 int error = -ENOMEM;
403 attrlist_cursor_kern_t *cursor;
404 xfs_fsop_attrlist_handlereq_t al_hreq;
405 struct dentry *dentry;
406 char *kbuf;
407
408 if (!capable(CAP_SYS_ADMIN))
409 return -XFS_ERROR(EPERM);
410 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
411 return -XFS_ERROR(EFAULT);
412 if (al_hreq.buflen < sizeof(struct attrlist) ||
413 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 = kmem_zalloc(al_hreq.buflen, KM_SLEEP | KM_MAYFAIL);
427 if (!kbuf) {
428 kbuf = kmem_zalloc_large(al_hreq.buflen);
429 if (!kbuf)
430 goto out_dput;
431 }
432
433 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
434 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
435 al_hreq.flags, cursor);
436 if (error)
437 goto out_kfree;
438
439 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
440 error = -EFAULT;
441
442 out_kfree:
443 if (is_vmalloc_addr(kbuf))
444 kmem_free_large(kbuf);
445 else
446 kmem_free(kbuf);
447 out_dput:
448 dput(dentry);
449 return error;
450 }
451
452 int
453 xfs_attrmulti_attr_get(
454 struct inode *inode,
455 unsigned char *name,
456 unsigned char __user *ubuf,
457 __uint32_t *len,
458 __uint32_t flags)
459 {
460 unsigned char *kbuf;
461 int error = EFAULT;
462
463 if (*len > XATTR_SIZE_MAX)
464 return EINVAL;
465 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
466 if (!kbuf) {
467 kbuf = kmem_zalloc_large(*len);
468 if (!kbuf)
469 return ENOMEM;
470 }
471
472 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
473 if (error)
474 goto out_kfree;
475
476 if (copy_to_user(ubuf, kbuf, *len))
477 error = EFAULT;
478
479 out_kfree:
480 if (is_vmalloc_addr(kbuf))
481 kmem_free_large(kbuf);
482 else
483 kmem_free(kbuf);
484 return error;
485 }
486
487 int
488 xfs_attrmulti_attr_set(
489 struct inode *inode,
490 unsigned char *name,
491 const unsigned char __user *ubuf,
492 __uint32_t len,
493 __uint32_t flags)
494 {
495 unsigned char *kbuf;
496 int error = EFAULT;
497
498 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
499 return EPERM;
500 if (len > XATTR_SIZE_MAX)
501 return EINVAL;
502
503 kbuf = memdup_user(ubuf, len);
504 if (IS_ERR(kbuf))
505 return PTR_ERR(kbuf);
506
507 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
508
509 return error;
510 }
511
512 int
513 xfs_attrmulti_attr_remove(
514 struct inode *inode,
515 unsigned char *name,
516 __uint32_t flags)
517 {
518 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
519 return EPERM;
520 return xfs_attr_remove(XFS_I(inode), name, flags);
521 }
522
523 STATIC int
524 xfs_attrmulti_by_handle(
525 struct file *parfilp,
526 void __user *arg)
527 {
528 int error;
529 xfs_attr_multiop_t *ops;
530 xfs_fsop_attrmulti_handlereq_t am_hreq;
531 struct dentry *dentry;
532 unsigned int i, size;
533 unsigned char *attr_name;
534
535 if (!capable(CAP_SYS_ADMIN))
536 return -XFS_ERROR(EPERM);
537 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
538 return -XFS_ERROR(EFAULT);
539
540 /* overflow check */
541 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
542 return -E2BIG;
543
544 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
545 if (IS_ERR(dentry))
546 return PTR_ERR(dentry);
547
548 error = E2BIG;
549 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
550 if (!size || size > 16 * PAGE_SIZE)
551 goto out_dput;
552
553 ops = memdup_user(am_hreq.ops, size);
554 if (IS_ERR(ops)) {
555 error = PTR_ERR(ops);
556 goto out_dput;
557 }
558
559 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
560 if (!attr_name)
561 goto out_kfree_ops;
562
563 error = 0;
564 for (i = 0; i < am_hreq.opcount; i++) {
565 ops[i].am_error = strncpy_from_user((char *)attr_name,
566 ops[i].am_attrname, MAXNAMELEN);
567 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
568 error = -ERANGE;
569 if (ops[i].am_error < 0)
570 break;
571
572 switch (ops[i].am_opcode) {
573 case ATTR_OP_GET:
574 ops[i].am_error = xfs_attrmulti_attr_get(
575 dentry->d_inode, attr_name,
576 ops[i].am_attrvalue, &ops[i].am_length,
577 ops[i].am_flags);
578 break;
579 case ATTR_OP_SET:
580 ops[i].am_error = mnt_want_write_file(parfilp);
581 if (ops[i].am_error)
582 break;
583 ops[i].am_error = xfs_attrmulti_attr_set(
584 dentry->d_inode, attr_name,
585 ops[i].am_attrvalue, ops[i].am_length,
586 ops[i].am_flags);
587 mnt_drop_write_file(parfilp);
588 break;
589 case ATTR_OP_REMOVE:
590 ops[i].am_error = mnt_want_write_file(parfilp);
591 if (ops[i].am_error)
592 break;
593 ops[i].am_error = xfs_attrmulti_attr_remove(
594 dentry->d_inode, attr_name,
595 ops[i].am_flags);
596 mnt_drop_write_file(parfilp);
597 break;
598 default:
599 ops[i].am_error = EINVAL;
600 }
601 }
602
603 if (copy_to_user(am_hreq.ops, ops, size))
604 error = XFS_ERROR(EFAULT);
605
606 kfree(attr_name);
607 out_kfree_ops:
608 kfree(ops);
609 out_dput:
610 dput(dentry);
611 return -error;
612 }
613
614 int
615 xfs_ioc_space(
616 struct xfs_inode *ip,
617 struct inode *inode,
618 struct file *filp,
619 int ioflags,
620 unsigned int cmd,
621 xfs_flock64_t *bf)
622 {
623 int attr_flags = 0;
624 int error;
625
626 /*
627 * Only allow the sys admin to reserve space unless
628 * unwritten extents are enabled.
629 */
630 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
631 !capable(CAP_SYS_ADMIN))
632 return -XFS_ERROR(EPERM);
633
634 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
635 return -XFS_ERROR(EPERM);
636
637 if (!(filp->f_mode & FMODE_WRITE))
638 return -XFS_ERROR(EBADF);
639
640 if (!S_ISREG(inode->i_mode))
641 return -XFS_ERROR(EINVAL);
642
643 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
644 attr_flags |= XFS_ATTR_NONBLOCK;
645
646 if (filp->f_flags & O_DSYNC)
647 attr_flags |= XFS_ATTR_SYNC;
648
649 if (ioflags & IO_INVIS)
650 attr_flags |= XFS_ATTR_DMI;
651
652 error = mnt_want_write_file(filp);
653 if (error)
654 return error;
655 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
656 mnt_drop_write_file(filp);
657 return -error;
658 }
659
660 STATIC int
661 xfs_ioc_bulkstat(
662 xfs_mount_t *mp,
663 unsigned int cmd,
664 void __user *arg)
665 {
666 xfs_fsop_bulkreq_t bulkreq;
667 int count; /* # of records returned */
668 xfs_ino_t inlast; /* last inode number */
669 int done;
670 int error;
671
672 /* done = 1 if there are more stats to get and if bulkstat */
673 /* should be called again (unused here, but used in dmapi) */
674
675 if (!capable(CAP_SYS_ADMIN))
676 return -EPERM;
677
678 if (XFS_FORCED_SHUTDOWN(mp))
679 return -XFS_ERROR(EIO);
680
681 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
682 return -XFS_ERROR(EFAULT);
683
684 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
685 return -XFS_ERROR(EFAULT);
686
687 if ((count = bulkreq.icount) <= 0)
688 return -XFS_ERROR(EINVAL);
689
690 if (bulkreq.ubuffer == NULL)
691 return -XFS_ERROR(EINVAL);
692
693 if (cmd == XFS_IOC_FSINUMBERS)
694 error = xfs_inumbers(mp, &inlast, &count,
695 bulkreq.ubuffer, xfs_inumbers_fmt);
696 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
697 error = xfs_bulkstat_single(mp, &inlast,
698 bulkreq.ubuffer, &done);
699 else /* XFS_IOC_FSBULKSTAT */
700 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
701 sizeof(xfs_bstat_t), bulkreq.ubuffer,
702 &done);
703
704 if (error)
705 return -error;
706
707 if (bulkreq.ocount != NULL) {
708 if (copy_to_user(bulkreq.lastip, &inlast,
709 sizeof(xfs_ino_t)))
710 return -XFS_ERROR(EFAULT);
711
712 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
713 return -XFS_ERROR(EFAULT);
714 }
715
716 return 0;
717 }
718
719 STATIC int
720 xfs_ioc_fsgeometry_v1(
721 xfs_mount_t *mp,
722 void __user *arg)
723 {
724 xfs_fsop_geom_t fsgeo;
725 int error;
726
727 error = xfs_fs_geometry(mp, &fsgeo, 3);
728 if (error)
729 return -error;
730
731 /*
732 * Caller should have passed an argument of type
733 * xfs_fsop_geom_v1_t. This is a proper subset of the
734 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
735 */
736 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
737 return -XFS_ERROR(EFAULT);
738 return 0;
739 }
740
741 STATIC int
742 xfs_ioc_fsgeometry(
743 xfs_mount_t *mp,
744 void __user *arg)
745 {
746 xfs_fsop_geom_t fsgeo;
747 int error;
748
749 error = xfs_fs_geometry(mp, &fsgeo, 4);
750 if (error)
751 return -error;
752
753 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
754 return -XFS_ERROR(EFAULT);
755 return 0;
756 }
757
758 /*
759 * Linux extended inode flags interface.
760 */
761
762 STATIC unsigned int
763 xfs_merge_ioc_xflags(
764 unsigned int flags,
765 unsigned int start)
766 {
767 unsigned int xflags = start;
768
769 if (flags & FS_IMMUTABLE_FL)
770 xflags |= XFS_XFLAG_IMMUTABLE;
771 else
772 xflags &= ~XFS_XFLAG_IMMUTABLE;
773 if (flags & FS_APPEND_FL)
774 xflags |= XFS_XFLAG_APPEND;
775 else
776 xflags &= ~XFS_XFLAG_APPEND;
777 if (flags & FS_SYNC_FL)
778 xflags |= XFS_XFLAG_SYNC;
779 else
780 xflags &= ~XFS_XFLAG_SYNC;
781 if (flags & FS_NOATIME_FL)
782 xflags |= XFS_XFLAG_NOATIME;
783 else
784 xflags &= ~XFS_XFLAG_NOATIME;
785 if (flags & FS_NODUMP_FL)
786 xflags |= XFS_XFLAG_NODUMP;
787 else
788 xflags &= ~XFS_XFLAG_NODUMP;
789
790 return xflags;
791 }
792
793 STATIC unsigned int
794 xfs_di2lxflags(
795 __uint16_t di_flags)
796 {
797 unsigned int flags = 0;
798
799 if (di_flags & XFS_DIFLAG_IMMUTABLE)
800 flags |= FS_IMMUTABLE_FL;
801 if (di_flags & XFS_DIFLAG_APPEND)
802 flags |= FS_APPEND_FL;
803 if (di_flags & XFS_DIFLAG_SYNC)
804 flags |= FS_SYNC_FL;
805 if (di_flags & XFS_DIFLAG_NOATIME)
806 flags |= FS_NOATIME_FL;
807 if (di_flags & XFS_DIFLAG_NODUMP)
808 flags |= FS_NODUMP_FL;
809 return flags;
810 }
811
812 STATIC int
813 xfs_ioc_fsgetxattr(
814 xfs_inode_t *ip,
815 int attr,
816 void __user *arg)
817 {
818 struct fsxattr fa;
819
820 memset(&fa, 0, sizeof(struct fsxattr));
821
822 xfs_ilock(ip, XFS_ILOCK_SHARED);
823 fa.fsx_xflags = xfs_ip2xflags(ip);
824 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
825 fa.fsx_projid = xfs_get_projid(ip);
826
827 if (attr) {
828 if (ip->i_afp) {
829 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
830 fa.fsx_nextents = ip->i_afp->if_bytes /
831 sizeof(xfs_bmbt_rec_t);
832 else
833 fa.fsx_nextents = ip->i_d.di_anextents;
834 } else
835 fa.fsx_nextents = 0;
836 } else {
837 if (ip->i_df.if_flags & XFS_IFEXTENTS)
838 fa.fsx_nextents = ip->i_df.if_bytes /
839 sizeof(xfs_bmbt_rec_t);
840 else
841 fa.fsx_nextents = ip->i_d.di_nextents;
842 }
843 xfs_iunlock(ip, XFS_ILOCK_SHARED);
844
845 if (copy_to_user(arg, &fa, sizeof(fa)))
846 return -EFAULT;
847 return 0;
848 }
849
850 STATIC void
851 xfs_set_diflags(
852 struct xfs_inode *ip,
853 unsigned int xflags)
854 {
855 unsigned int di_flags;
856
857 /* can't set PREALLOC this way, just preserve it */
858 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
859 if (xflags & XFS_XFLAG_IMMUTABLE)
860 di_flags |= XFS_DIFLAG_IMMUTABLE;
861 if (xflags & XFS_XFLAG_APPEND)
862 di_flags |= XFS_DIFLAG_APPEND;
863 if (xflags & XFS_XFLAG_SYNC)
864 di_flags |= XFS_DIFLAG_SYNC;
865 if (xflags & XFS_XFLAG_NOATIME)
866 di_flags |= XFS_DIFLAG_NOATIME;
867 if (xflags & XFS_XFLAG_NODUMP)
868 di_flags |= XFS_DIFLAG_NODUMP;
869 if (xflags & XFS_XFLAG_PROJINHERIT)
870 di_flags |= XFS_DIFLAG_PROJINHERIT;
871 if (xflags & XFS_XFLAG_NODEFRAG)
872 di_flags |= XFS_DIFLAG_NODEFRAG;
873 if (xflags & XFS_XFLAG_FILESTREAM)
874 di_flags |= XFS_DIFLAG_FILESTREAM;
875 if (S_ISDIR(ip->i_d.di_mode)) {
876 if (xflags & XFS_XFLAG_RTINHERIT)
877 di_flags |= XFS_DIFLAG_RTINHERIT;
878 if (xflags & XFS_XFLAG_NOSYMLINKS)
879 di_flags |= XFS_DIFLAG_NOSYMLINKS;
880 if (xflags & XFS_XFLAG_EXTSZINHERIT)
881 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
882 } else if (S_ISREG(ip->i_d.di_mode)) {
883 if (xflags & XFS_XFLAG_REALTIME)
884 di_flags |= XFS_DIFLAG_REALTIME;
885 if (xflags & XFS_XFLAG_EXTSIZE)
886 di_flags |= XFS_DIFLAG_EXTSIZE;
887 }
888
889 ip->i_d.di_flags = di_flags;
890 }
891
892 STATIC void
893 xfs_diflags_to_linux(
894 struct xfs_inode *ip)
895 {
896 struct inode *inode = VFS_I(ip);
897 unsigned int xflags = xfs_ip2xflags(ip);
898
899 if (xflags & XFS_XFLAG_IMMUTABLE)
900 inode->i_flags |= S_IMMUTABLE;
901 else
902 inode->i_flags &= ~S_IMMUTABLE;
903 if (xflags & XFS_XFLAG_APPEND)
904 inode->i_flags |= S_APPEND;
905 else
906 inode->i_flags &= ~S_APPEND;
907 if (xflags & XFS_XFLAG_SYNC)
908 inode->i_flags |= S_SYNC;
909 else
910 inode->i_flags &= ~S_SYNC;
911 if (xflags & XFS_XFLAG_NOATIME)
912 inode->i_flags |= S_NOATIME;
913 else
914 inode->i_flags &= ~S_NOATIME;
915 }
916
917 #define FSX_PROJID 1
918 #define FSX_EXTSIZE 2
919 #define FSX_XFLAGS 4
920 #define FSX_NONBLOCK 8
921
922 STATIC int
923 xfs_ioctl_setattr(
924 xfs_inode_t *ip,
925 struct fsxattr *fa,
926 int mask)
927 {
928 struct xfs_mount *mp = ip->i_mount;
929 struct xfs_trans *tp;
930 unsigned int lock_flags = 0;
931 struct xfs_dquot *udqp = NULL;
932 struct xfs_dquot *gdqp = NULL;
933 struct xfs_dquot *olddquot = NULL;
934 int code;
935
936 trace_xfs_ioctl_setattr(ip);
937
938 if (mp->m_flags & XFS_MOUNT_RDONLY)
939 return XFS_ERROR(EROFS);
940 if (XFS_FORCED_SHUTDOWN(mp))
941 return XFS_ERROR(EIO);
942
943 /*
944 * Disallow 32bit project ids when projid32bit feature is not enabled.
945 */
946 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
947 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
948 return XFS_ERROR(EINVAL);
949
950 /*
951 * If disk quotas is on, we make sure that the dquots do exist on disk,
952 * before we start any other transactions. Trying to do this later
953 * is messy. We don't care to take a readlock to look at the ids
954 * in inode here, because we can't hold it across the trans_reserve.
955 * If the IDs do change before we take the ilock, we're covered
956 * because the i_*dquot fields will get updated anyway.
957 */
958 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
959 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
960 ip->i_d.di_gid, fa->fsx_projid,
961 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
962 if (code)
963 return code;
964 }
965
966 /*
967 * For the other attributes, we acquire the inode lock and
968 * first do an error checking pass.
969 */
970 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
971 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
972 if (code)
973 goto error_return;
974
975 lock_flags = XFS_ILOCK_EXCL;
976 xfs_ilock(ip, lock_flags);
977
978 /*
979 * CAP_FOWNER overrides the following restrictions:
980 *
981 * The user ID of the calling process must be equal
982 * to the file owner ID, except in cases where the
983 * CAP_FSETID capability is applicable.
984 */
985 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
986 code = XFS_ERROR(EPERM);
987 goto error_return;
988 }
989
990 /*
991 * Do a quota reservation only if projid is actually going to change.
992 */
993 if (mask & FSX_PROJID) {
994 if (XFS_IS_QUOTA_RUNNING(mp) &&
995 XFS_IS_PQUOTA_ON(mp) &&
996 xfs_get_projid(ip) != fa->fsx_projid) {
997 ASSERT(tp);
998 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
999 capable(CAP_FOWNER) ?
1000 XFS_QMOPT_FORCE_RES : 0);
1001 if (code) /* out of quota */
1002 goto error_return;
1003 }
1004 }
1005
1006 if (mask & FSX_EXTSIZE) {
1007 /*
1008 * Can't change extent size if any extents are allocated.
1009 */
1010 if (ip->i_d.di_nextents &&
1011 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1012 fa->fsx_extsize)) {
1013 code = XFS_ERROR(EINVAL); /* EFBIG? */
1014 goto error_return;
1015 }
1016
1017 /*
1018 * Extent size must be a multiple of the appropriate block
1019 * size, if set at all. It must also be smaller than the
1020 * maximum extent size supported by the filesystem.
1021 *
1022 * Also, for non-realtime files, limit the extent size hint to
1023 * half the size of the AGs in the filesystem so alignment
1024 * doesn't result in extents larger than an AG.
1025 */
1026 if (fa->fsx_extsize != 0) {
1027 xfs_extlen_t size;
1028 xfs_fsblock_t extsize_fsb;
1029
1030 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1031 if (extsize_fsb > MAXEXTLEN) {
1032 code = XFS_ERROR(EINVAL);
1033 goto error_return;
1034 }
1035
1036 if (XFS_IS_REALTIME_INODE(ip) ||
1037 ((mask & FSX_XFLAGS) &&
1038 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1039 size = mp->m_sb.sb_rextsize <<
1040 mp->m_sb.sb_blocklog;
1041 } else {
1042 size = mp->m_sb.sb_blocksize;
1043 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1044 code = XFS_ERROR(EINVAL);
1045 goto error_return;
1046 }
1047 }
1048
1049 if (fa->fsx_extsize % size) {
1050 code = XFS_ERROR(EINVAL);
1051 goto error_return;
1052 }
1053 }
1054 }
1055
1056
1057 if (mask & FSX_XFLAGS) {
1058 /*
1059 * Can't change realtime flag if any extents are allocated.
1060 */
1061 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1062 (XFS_IS_REALTIME_INODE(ip)) !=
1063 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1064 code = XFS_ERROR(EINVAL); /* EFBIG? */
1065 goto error_return;
1066 }
1067
1068 /*
1069 * If realtime flag is set then must have realtime data.
1070 */
1071 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1072 if ((mp->m_sb.sb_rblocks == 0) ||
1073 (mp->m_sb.sb_rextsize == 0) ||
1074 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1075 code = XFS_ERROR(EINVAL);
1076 goto error_return;
1077 }
1078 }
1079
1080 /*
1081 * Can't modify an immutable/append-only file unless
1082 * we have appropriate permission.
1083 */
1084 if ((ip->i_d.di_flags &
1085 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1086 (fa->fsx_xflags &
1087 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1088 !capable(CAP_LINUX_IMMUTABLE)) {
1089 code = XFS_ERROR(EPERM);
1090 goto error_return;
1091 }
1092 }
1093
1094 xfs_trans_ijoin(tp, ip, 0);
1095
1096 /*
1097 * Change file ownership. Must be the owner or privileged.
1098 */
1099 if (mask & FSX_PROJID) {
1100 /*
1101 * CAP_FSETID overrides the following restrictions:
1102 *
1103 * The set-user-ID and set-group-ID bits of a file will be
1104 * cleared upon successful return from chown()
1105 */
1106 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1107 !capable(CAP_FSETID))
1108 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1109
1110 /*
1111 * Change the ownerships and register quota modifications
1112 * in the transaction.
1113 */
1114 if (xfs_get_projid(ip) != fa->fsx_projid) {
1115 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1116 olddquot = xfs_qm_vop_chown(tp, ip,
1117 &ip->i_gdquot, gdqp);
1118 }
1119 xfs_set_projid(ip, fa->fsx_projid);
1120
1121 /*
1122 * We may have to rev the inode as well as
1123 * the superblock version number since projids didn't
1124 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1125 */
1126 if (ip->i_d.di_version == 1)
1127 xfs_bump_ino_vers2(tp, ip);
1128 }
1129
1130 }
1131
1132 if (mask & FSX_EXTSIZE)
1133 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1134 if (mask & FSX_XFLAGS) {
1135 xfs_set_diflags(ip, fa->fsx_xflags);
1136 xfs_diflags_to_linux(ip);
1137 }
1138
1139 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1140 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1141
1142 XFS_STATS_INC(xs_ig_attrchg);
1143
1144 /*
1145 * If this is a synchronous mount, make sure that the
1146 * transaction goes to disk before returning to the user.
1147 * This is slightly sub-optimal in that truncates require
1148 * two sync transactions instead of one for wsync filesystems.
1149 * One for the truncate and one for the timestamps since we
1150 * don't want to change the timestamps unless we're sure the
1151 * truncate worked. Truncates are less than 1% of the laddis
1152 * mix so this probably isn't worth the trouble to optimize.
1153 */
1154 if (mp->m_flags & XFS_MOUNT_WSYNC)
1155 xfs_trans_set_sync(tp);
1156 code = xfs_trans_commit(tp, 0);
1157 xfs_iunlock(ip, lock_flags);
1158
1159 /*
1160 * Release any dquot(s) the inode had kept before chown.
1161 */
1162 xfs_qm_dqrele(olddquot);
1163 xfs_qm_dqrele(udqp);
1164 xfs_qm_dqrele(gdqp);
1165
1166 return code;
1167
1168 error_return:
1169 xfs_qm_dqrele(udqp);
1170 xfs_qm_dqrele(gdqp);
1171 xfs_trans_cancel(tp, 0);
1172 if (lock_flags)
1173 xfs_iunlock(ip, lock_flags);
1174 return code;
1175 }
1176
1177 STATIC int
1178 xfs_ioc_fssetxattr(
1179 xfs_inode_t *ip,
1180 struct file *filp,
1181 void __user *arg)
1182 {
1183 struct fsxattr fa;
1184 unsigned int mask;
1185 int error;
1186
1187 if (copy_from_user(&fa, arg, sizeof(fa)))
1188 return -EFAULT;
1189
1190 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1191 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1192 mask |= FSX_NONBLOCK;
1193
1194 error = mnt_want_write_file(filp);
1195 if (error)
1196 return error;
1197 error = xfs_ioctl_setattr(ip, &fa, mask);
1198 mnt_drop_write_file(filp);
1199 return -error;
1200 }
1201
1202 STATIC int
1203 xfs_ioc_getxflags(
1204 xfs_inode_t *ip,
1205 void __user *arg)
1206 {
1207 unsigned int flags;
1208
1209 flags = xfs_di2lxflags(ip->i_d.di_flags);
1210 if (copy_to_user(arg, &flags, sizeof(flags)))
1211 return -EFAULT;
1212 return 0;
1213 }
1214
1215 STATIC int
1216 xfs_ioc_setxflags(
1217 xfs_inode_t *ip,
1218 struct file *filp,
1219 void __user *arg)
1220 {
1221 struct fsxattr fa;
1222 unsigned int flags;
1223 unsigned int mask;
1224 int error;
1225
1226 if (copy_from_user(&flags, arg, sizeof(flags)))
1227 return -EFAULT;
1228
1229 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1230 FS_NOATIME_FL | FS_NODUMP_FL | \
1231 FS_SYNC_FL))
1232 return -EOPNOTSUPP;
1233
1234 mask = FSX_XFLAGS;
1235 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1236 mask |= FSX_NONBLOCK;
1237 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1238
1239 error = mnt_want_write_file(filp);
1240 if (error)
1241 return error;
1242 error = xfs_ioctl_setattr(ip, &fa, mask);
1243 mnt_drop_write_file(filp);
1244 return -error;
1245 }
1246
1247 STATIC int
1248 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1249 {
1250 struct getbmap __user *base = *ap;
1251
1252 /* copy only getbmap portion (not getbmapx) */
1253 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1254 return XFS_ERROR(EFAULT);
1255
1256 *ap += sizeof(struct getbmap);
1257 return 0;
1258 }
1259
1260 STATIC int
1261 xfs_ioc_getbmap(
1262 struct xfs_inode *ip,
1263 int ioflags,
1264 unsigned int cmd,
1265 void __user *arg)
1266 {
1267 struct getbmapx bmx;
1268 int error;
1269
1270 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1271 return -XFS_ERROR(EFAULT);
1272
1273 if (bmx.bmv_count < 2)
1274 return -XFS_ERROR(EINVAL);
1275
1276 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1277 if (ioflags & IO_INVIS)
1278 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1279
1280 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1281 (struct getbmap *)arg+1);
1282 if (error)
1283 return -error;
1284
1285 /* copy back header - only size of getbmap */
1286 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1287 return -XFS_ERROR(EFAULT);
1288 return 0;
1289 }
1290
1291 STATIC int
1292 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1293 {
1294 struct getbmapx __user *base = *ap;
1295
1296 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1297 return XFS_ERROR(EFAULT);
1298
1299 *ap += sizeof(struct getbmapx);
1300 return 0;
1301 }
1302
1303 STATIC int
1304 xfs_ioc_getbmapx(
1305 struct xfs_inode *ip,
1306 void __user *arg)
1307 {
1308 struct getbmapx bmx;
1309 int error;
1310
1311 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1312 return -XFS_ERROR(EFAULT);
1313
1314 if (bmx.bmv_count < 2)
1315 return -XFS_ERROR(EINVAL);
1316
1317 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1318 return -XFS_ERROR(EINVAL);
1319
1320 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1321 (struct getbmapx *)arg+1);
1322 if (error)
1323 return -error;
1324
1325 /* copy back header */
1326 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1327 return -XFS_ERROR(EFAULT);
1328
1329 return 0;
1330 }
1331
1332 /*
1333 * Note: some of the ioctl's return positive numbers as a
1334 * byte count indicating success, such as readlink_by_handle.
1335 * So we don't "sign flip" like most other routines. This means
1336 * true errors need to be returned as a negative value.
1337 */
1338 long
1339 xfs_file_ioctl(
1340 struct file *filp,
1341 unsigned int cmd,
1342 unsigned long p)
1343 {
1344 struct inode *inode = file_inode(filp);
1345 struct xfs_inode *ip = XFS_I(inode);
1346 struct xfs_mount *mp = ip->i_mount;
1347 void __user *arg = (void __user *)p;
1348 int ioflags = 0;
1349 int error;
1350
1351 if (filp->f_mode & FMODE_NOCMTIME)
1352 ioflags |= IO_INVIS;
1353
1354 trace_xfs_file_ioctl(ip);
1355
1356 switch (cmd) {
1357 case FITRIM:
1358 return xfs_ioc_trim(mp, arg);
1359 case XFS_IOC_ALLOCSP:
1360 case XFS_IOC_FREESP:
1361 case XFS_IOC_RESVSP:
1362 case XFS_IOC_UNRESVSP:
1363 case XFS_IOC_ALLOCSP64:
1364 case XFS_IOC_FREESP64:
1365 case XFS_IOC_RESVSP64:
1366 case XFS_IOC_UNRESVSP64:
1367 case XFS_IOC_ZERO_RANGE: {
1368 xfs_flock64_t bf;
1369
1370 if (copy_from_user(&bf, arg, sizeof(bf)))
1371 return -XFS_ERROR(EFAULT);
1372 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1373 }
1374 case XFS_IOC_DIOINFO: {
1375 struct dioattr da;
1376 xfs_buftarg_t *target =
1377 XFS_IS_REALTIME_INODE(ip) ?
1378 mp->m_rtdev_targp : mp->m_ddev_targp;
1379
1380 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1381 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1382
1383 if (copy_to_user(arg, &da, sizeof(da)))
1384 return -XFS_ERROR(EFAULT);
1385 return 0;
1386 }
1387
1388 case XFS_IOC_FSBULKSTAT_SINGLE:
1389 case XFS_IOC_FSBULKSTAT:
1390 case XFS_IOC_FSINUMBERS:
1391 return xfs_ioc_bulkstat(mp, cmd, arg);
1392
1393 case XFS_IOC_FSGEOMETRY_V1:
1394 return xfs_ioc_fsgeometry_v1(mp, arg);
1395
1396 case XFS_IOC_FSGEOMETRY:
1397 return xfs_ioc_fsgeometry(mp, arg);
1398
1399 case XFS_IOC_GETVERSION:
1400 return put_user(inode->i_generation, (int __user *)arg);
1401
1402 case XFS_IOC_FSGETXATTR:
1403 return xfs_ioc_fsgetxattr(ip, 0, arg);
1404 case XFS_IOC_FSGETXATTRA:
1405 return xfs_ioc_fsgetxattr(ip, 1, arg);
1406 case XFS_IOC_FSSETXATTR:
1407 return xfs_ioc_fssetxattr(ip, filp, arg);
1408 case XFS_IOC_GETXFLAGS:
1409 return xfs_ioc_getxflags(ip, arg);
1410 case XFS_IOC_SETXFLAGS:
1411 return xfs_ioc_setxflags(ip, filp, arg);
1412
1413 case XFS_IOC_FSSETDM: {
1414 struct fsdmidata dmi;
1415
1416 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1417 return -XFS_ERROR(EFAULT);
1418
1419 error = mnt_want_write_file(filp);
1420 if (error)
1421 return error;
1422
1423 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1424 dmi.fsd_dmstate);
1425 mnt_drop_write_file(filp);
1426 return -error;
1427 }
1428
1429 case XFS_IOC_GETBMAP:
1430 case XFS_IOC_GETBMAPA:
1431 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1432
1433 case XFS_IOC_GETBMAPX:
1434 return xfs_ioc_getbmapx(ip, arg);
1435
1436 case XFS_IOC_FD_TO_HANDLE:
1437 case XFS_IOC_PATH_TO_HANDLE:
1438 case XFS_IOC_PATH_TO_FSHANDLE: {
1439 xfs_fsop_handlereq_t hreq;
1440
1441 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1442 return -XFS_ERROR(EFAULT);
1443 return xfs_find_handle(cmd, &hreq);
1444 }
1445 case XFS_IOC_OPEN_BY_HANDLE: {
1446 xfs_fsop_handlereq_t hreq;
1447
1448 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1449 return -XFS_ERROR(EFAULT);
1450 return xfs_open_by_handle(filp, &hreq);
1451 }
1452 case XFS_IOC_FSSETDM_BY_HANDLE:
1453 return xfs_fssetdm_by_handle(filp, arg);
1454
1455 case XFS_IOC_READLINK_BY_HANDLE: {
1456 xfs_fsop_handlereq_t hreq;
1457
1458 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1459 return -XFS_ERROR(EFAULT);
1460 return xfs_readlink_by_handle(filp, &hreq);
1461 }
1462 case XFS_IOC_ATTRLIST_BY_HANDLE:
1463 return xfs_attrlist_by_handle(filp, arg);
1464
1465 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1466 return xfs_attrmulti_by_handle(filp, arg);
1467
1468 case XFS_IOC_SWAPEXT: {
1469 struct xfs_swapext sxp;
1470
1471 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1472 return -XFS_ERROR(EFAULT);
1473 error = mnt_want_write_file(filp);
1474 if (error)
1475 return error;
1476 error = xfs_swapext(&sxp);
1477 mnt_drop_write_file(filp);
1478 return -error;
1479 }
1480
1481 case XFS_IOC_FSCOUNTS: {
1482 xfs_fsop_counts_t out;
1483
1484 error = xfs_fs_counts(mp, &out);
1485 if (error)
1486 return -error;
1487
1488 if (copy_to_user(arg, &out, sizeof(out)))
1489 return -XFS_ERROR(EFAULT);
1490 return 0;
1491 }
1492
1493 case XFS_IOC_SET_RESBLKS: {
1494 xfs_fsop_resblks_t inout;
1495 __uint64_t in;
1496
1497 if (!capable(CAP_SYS_ADMIN))
1498 return -EPERM;
1499
1500 if (mp->m_flags & XFS_MOUNT_RDONLY)
1501 return -XFS_ERROR(EROFS);
1502
1503 if (copy_from_user(&inout, arg, sizeof(inout)))
1504 return -XFS_ERROR(EFAULT);
1505
1506 error = mnt_want_write_file(filp);
1507 if (error)
1508 return error;
1509
1510 /* input parameter is passed in resblks field of structure */
1511 in = inout.resblks;
1512 error = xfs_reserve_blocks(mp, &in, &inout);
1513 mnt_drop_write_file(filp);
1514 if (error)
1515 return -error;
1516
1517 if (copy_to_user(arg, &inout, sizeof(inout)))
1518 return -XFS_ERROR(EFAULT);
1519 return 0;
1520 }
1521
1522 case XFS_IOC_GET_RESBLKS: {
1523 xfs_fsop_resblks_t out;
1524
1525 if (!capable(CAP_SYS_ADMIN))
1526 return -EPERM;
1527
1528 error = xfs_reserve_blocks(mp, NULL, &out);
1529 if (error)
1530 return -error;
1531
1532 if (copy_to_user(arg, &out, sizeof(out)))
1533 return -XFS_ERROR(EFAULT);
1534
1535 return 0;
1536 }
1537
1538 case XFS_IOC_FSGROWFSDATA: {
1539 xfs_growfs_data_t in;
1540
1541 if (copy_from_user(&in, arg, sizeof(in)))
1542 return -XFS_ERROR(EFAULT);
1543
1544 error = mnt_want_write_file(filp);
1545 if (error)
1546 return error;
1547 error = xfs_growfs_data(mp, &in);
1548 mnt_drop_write_file(filp);
1549 return -error;
1550 }
1551
1552 case XFS_IOC_FSGROWFSLOG: {
1553 xfs_growfs_log_t in;
1554
1555 if (copy_from_user(&in, arg, sizeof(in)))
1556 return -XFS_ERROR(EFAULT);
1557
1558 error = mnt_want_write_file(filp);
1559 if (error)
1560 return error;
1561 error = xfs_growfs_log(mp, &in);
1562 mnt_drop_write_file(filp);
1563 return -error;
1564 }
1565
1566 case XFS_IOC_FSGROWFSRT: {
1567 xfs_growfs_rt_t in;
1568
1569 if (copy_from_user(&in, arg, sizeof(in)))
1570 return -XFS_ERROR(EFAULT);
1571
1572 error = mnt_want_write_file(filp);
1573 if (error)
1574 return error;
1575 error = xfs_growfs_rt(mp, &in);
1576 mnt_drop_write_file(filp);
1577 return -error;
1578 }
1579
1580 case XFS_IOC_GOINGDOWN: {
1581 __uint32_t in;
1582
1583 if (!capable(CAP_SYS_ADMIN))
1584 return -EPERM;
1585
1586 if (get_user(in, (__uint32_t __user *)arg))
1587 return -XFS_ERROR(EFAULT);
1588
1589 error = xfs_fs_goingdown(mp, in);
1590 return -error;
1591 }
1592
1593 case XFS_IOC_ERROR_INJECTION: {
1594 xfs_error_injection_t in;
1595
1596 if (!capable(CAP_SYS_ADMIN))
1597 return -EPERM;
1598
1599 if (copy_from_user(&in, arg, sizeof(in)))
1600 return -XFS_ERROR(EFAULT);
1601
1602 error = xfs_errortag_add(in.errtag, mp);
1603 return -error;
1604 }
1605
1606 case XFS_IOC_ERROR_CLEARALL:
1607 if (!capable(CAP_SYS_ADMIN))
1608 return -EPERM;
1609
1610 error = xfs_errortag_clearall(mp, 1);
1611 return -error;
1612
1613 case XFS_IOC_FREE_EOFBLOCKS: {
1614 struct xfs_eofblocks eofb;
1615
1616 if (!capable(CAP_SYS_ADMIN))
1617 return -EPERM;
1618
1619 if (mp->m_flags & XFS_MOUNT_RDONLY)
1620 return -XFS_ERROR(EROFS);
1621
1622 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1623 return -XFS_ERROR(EFAULT);
1624
1625 if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
1626 return -XFS_ERROR(EINVAL);
1627
1628 if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
1629 return -XFS_ERROR(EINVAL);
1630
1631 if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) ||
1632 memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
1633 return -XFS_ERROR(EINVAL);
1634
1635 error = xfs_icache_free_eofblocks(mp, &eofb);
1636 return -error;
1637 }
1638
1639 default:
1640 return -ENOTTY;
1641 }
1642 }
Linux with added FPC-III support