Loading...
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 */
67int
68xfs_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 */
149STATIC int
150xfs_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 */
160struct dentry *
161xfs_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
192STATIC struct dentry *
193xfs_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
200int
201xfs_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 (S_ISREG(inode->i_mode)) {
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 */
285STATIC int
286do_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
307int
308xfs_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
355STATIC int
356xfs_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
392STATIC int
393xfs_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
440int
441xfs_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
469int
470xfs_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
494int
495xfs_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
505STATIC int
506xfs_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
596int
597xfs_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
628 if (filp->f_flags & O_DSYNC)
629 attr_flags |= XFS_ATTR_SYNC;
630
631 if (ioflags & IO_INVIS)
632 attr_flags |= XFS_ATTR_DMI;
633
634 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
635 return -error;
636}
637
638STATIC int
639xfs_ioc_bulkstat(
640 xfs_mount_t *mp,
641 unsigned int cmd,
642 void __user *arg)
643{
644 xfs_fsop_bulkreq_t bulkreq;
645 int count; /* # of records returned */
646 xfs_ino_t inlast; /* last inode number */
647 int done;
648 int error;
649
650 /* done = 1 if there are more stats to get and if bulkstat */
651 /* should be called again (unused here, but used in dmapi) */
652
653 if (!capable(CAP_SYS_ADMIN))
654 return -EPERM;
655
656 if (XFS_FORCED_SHUTDOWN(mp))
657 return -XFS_ERROR(EIO);
658
659 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
660 return -XFS_ERROR(EFAULT);
661
662 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
663 return -XFS_ERROR(EFAULT);
664
665 if ((count = bulkreq.icount) <= 0)
666 return -XFS_ERROR(EINVAL);
667
668 if (bulkreq.ubuffer == NULL)
669 return -XFS_ERROR(EINVAL);
670
671 if (cmd == XFS_IOC_FSINUMBERS)
672 error = xfs_inumbers(mp, &inlast, &count,
673 bulkreq.ubuffer, xfs_inumbers_fmt);
674 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
675 error = xfs_bulkstat_single(mp, &inlast,
676 bulkreq.ubuffer, &done);
677 else /* XFS_IOC_FSBULKSTAT */
678 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
679 sizeof(xfs_bstat_t), bulkreq.ubuffer,
680 &done);
681
682 if (error)
683 return -error;
684
685 if (bulkreq.ocount != NULL) {
686 if (copy_to_user(bulkreq.lastip, &inlast,
687 sizeof(xfs_ino_t)))
688 return -XFS_ERROR(EFAULT);
689
690 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
691 return -XFS_ERROR(EFAULT);
692 }
693
694 return 0;
695}
696
697STATIC int
698xfs_ioc_fsgeometry_v1(
699 xfs_mount_t *mp,
700 void __user *arg)
701{
702 xfs_fsop_geom_t fsgeo;
703 int error;
704
705 error = xfs_fs_geometry(mp, &fsgeo, 3);
706 if (error)
707 return -error;
708
709 /*
710 * Caller should have passed an argument of type
711 * xfs_fsop_geom_v1_t. This is a proper subset of the
712 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
713 */
714 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
715 return -XFS_ERROR(EFAULT);
716 return 0;
717}
718
719STATIC int
720xfs_ioc_fsgeometry(
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, 4);
728 if (error)
729 return -error;
730
731 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
732 return -XFS_ERROR(EFAULT);
733 return 0;
734}
735
736/*
737 * Linux extended inode flags interface.
738 */
739
740STATIC unsigned int
741xfs_merge_ioc_xflags(
742 unsigned int flags,
743 unsigned int start)
744{
745 unsigned int xflags = start;
746
747 if (flags & FS_IMMUTABLE_FL)
748 xflags |= XFS_XFLAG_IMMUTABLE;
749 else
750 xflags &= ~XFS_XFLAG_IMMUTABLE;
751 if (flags & FS_APPEND_FL)
752 xflags |= XFS_XFLAG_APPEND;
753 else
754 xflags &= ~XFS_XFLAG_APPEND;
755 if (flags & FS_SYNC_FL)
756 xflags |= XFS_XFLAG_SYNC;
757 else
758 xflags &= ~XFS_XFLAG_SYNC;
759 if (flags & FS_NOATIME_FL)
760 xflags |= XFS_XFLAG_NOATIME;
761 else
762 xflags &= ~XFS_XFLAG_NOATIME;
763 if (flags & FS_NODUMP_FL)
764 xflags |= XFS_XFLAG_NODUMP;
765 else
766 xflags &= ~XFS_XFLAG_NODUMP;
767
768 return xflags;
769}
770
771STATIC unsigned int
772xfs_di2lxflags(
773 __uint16_t di_flags)
774{
775 unsigned int flags = 0;
776
777 if (di_flags & XFS_DIFLAG_IMMUTABLE)
778 flags |= FS_IMMUTABLE_FL;
779 if (di_flags & XFS_DIFLAG_APPEND)
780 flags |= FS_APPEND_FL;
781 if (di_flags & XFS_DIFLAG_SYNC)
782 flags |= FS_SYNC_FL;
783 if (di_flags & XFS_DIFLAG_NOATIME)
784 flags |= FS_NOATIME_FL;
785 if (di_flags & XFS_DIFLAG_NODUMP)
786 flags |= FS_NODUMP_FL;
787 return flags;
788}
789
790STATIC int
791xfs_ioc_fsgetxattr(
792 xfs_inode_t *ip,
793 int attr,
794 void __user *arg)
795{
796 struct fsxattr fa;
797
798 memset(&fa, 0, sizeof(struct fsxattr));
799
800 xfs_ilock(ip, XFS_ILOCK_SHARED);
801 fa.fsx_xflags = xfs_ip2xflags(ip);
802 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
803 fa.fsx_projid = xfs_get_projid(ip);
804
805 if (attr) {
806 if (ip->i_afp) {
807 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
808 fa.fsx_nextents = ip->i_afp->if_bytes /
809 sizeof(xfs_bmbt_rec_t);
810 else
811 fa.fsx_nextents = ip->i_d.di_anextents;
812 } else
813 fa.fsx_nextents = 0;
814 } else {
815 if (ip->i_df.if_flags & XFS_IFEXTENTS)
816 fa.fsx_nextents = ip->i_df.if_bytes /
817 sizeof(xfs_bmbt_rec_t);
818 else
819 fa.fsx_nextents = ip->i_d.di_nextents;
820 }
821 xfs_iunlock(ip, XFS_ILOCK_SHARED);
822
823 if (copy_to_user(arg, &fa, sizeof(fa)))
824 return -EFAULT;
825 return 0;
826}
827
828STATIC void
829xfs_set_diflags(
830 struct xfs_inode *ip,
831 unsigned int xflags)
832{
833 unsigned int di_flags;
834
835 /* can't set PREALLOC this way, just preserve it */
836 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
837 if (xflags & XFS_XFLAG_IMMUTABLE)
838 di_flags |= XFS_DIFLAG_IMMUTABLE;
839 if (xflags & XFS_XFLAG_APPEND)
840 di_flags |= XFS_DIFLAG_APPEND;
841 if (xflags & XFS_XFLAG_SYNC)
842 di_flags |= XFS_DIFLAG_SYNC;
843 if (xflags & XFS_XFLAG_NOATIME)
844 di_flags |= XFS_DIFLAG_NOATIME;
845 if (xflags & XFS_XFLAG_NODUMP)
846 di_flags |= XFS_DIFLAG_NODUMP;
847 if (xflags & XFS_XFLAG_PROJINHERIT)
848 di_flags |= XFS_DIFLAG_PROJINHERIT;
849 if (xflags & XFS_XFLAG_NODEFRAG)
850 di_flags |= XFS_DIFLAG_NODEFRAG;
851 if (xflags & XFS_XFLAG_FILESTREAM)
852 di_flags |= XFS_DIFLAG_FILESTREAM;
853 if (S_ISDIR(ip->i_d.di_mode)) {
854 if (xflags & XFS_XFLAG_RTINHERIT)
855 di_flags |= XFS_DIFLAG_RTINHERIT;
856 if (xflags & XFS_XFLAG_NOSYMLINKS)
857 di_flags |= XFS_DIFLAG_NOSYMLINKS;
858 if (xflags & XFS_XFLAG_EXTSZINHERIT)
859 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
860 } else if (S_ISREG(ip->i_d.di_mode)) {
861 if (xflags & XFS_XFLAG_REALTIME)
862 di_flags |= XFS_DIFLAG_REALTIME;
863 if (xflags & XFS_XFLAG_EXTSIZE)
864 di_flags |= XFS_DIFLAG_EXTSIZE;
865 }
866
867 ip->i_d.di_flags = di_flags;
868}
869
870STATIC void
871xfs_diflags_to_linux(
872 struct xfs_inode *ip)
873{
874 struct inode *inode = VFS_I(ip);
875 unsigned int xflags = xfs_ip2xflags(ip);
876
877 if (xflags & XFS_XFLAG_IMMUTABLE)
878 inode->i_flags |= S_IMMUTABLE;
879 else
880 inode->i_flags &= ~S_IMMUTABLE;
881 if (xflags & XFS_XFLAG_APPEND)
882 inode->i_flags |= S_APPEND;
883 else
884 inode->i_flags &= ~S_APPEND;
885 if (xflags & XFS_XFLAG_SYNC)
886 inode->i_flags |= S_SYNC;
887 else
888 inode->i_flags &= ~S_SYNC;
889 if (xflags & XFS_XFLAG_NOATIME)
890 inode->i_flags |= S_NOATIME;
891 else
892 inode->i_flags &= ~S_NOATIME;
893}
894
895#define FSX_PROJID 1
896#define FSX_EXTSIZE 2
897#define FSX_XFLAGS 4
898#define FSX_NONBLOCK 8
899
900STATIC int
901xfs_ioctl_setattr(
902 xfs_inode_t *ip,
903 struct fsxattr *fa,
904 int mask)
905{
906 struct xfs_mount *mp = ip->i_mount;
907 struct xfs_trans *tp;
908 unsigned int lock_flags = 0;
909 struct xfs_dquot *udqp = NULL;
910 struct xfs_dquot *gdqp = NULL;
911 struct xfs_dquot *olddquot = NULL;
912 int code;
913
914 trace_xfs_ioctl_setattr(ip);
915
916 if (mp->m_flags & XFS_MOUNT_RDONLY)
917 return XFS_ERROR(EROFS);
918 if (XFS_FORCED_SHUTDOWN(mp))
919 return XFS_ERROR(EIO);
920
921 /*
922 * Disallow 32bit project ids when projid32bit feature is not enabled.
923 */
924 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
925 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
926 return XFS_ERROR(EINVAL);
927
928 /*
929 * If disk quotas is on, we make sure that the dquots do exist on disk,
930 * before we start any other transactions. Trying to do this later
931 * is messy. We don't care to take a readlock to look at the ids
932 * in inode here, because we can't hold it across the trans_reserve.
933 * If the IDs do change before we take the ilock, we're covered
934 * because the i_*dquot fields will get updated anyway.
935 */
936 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
937 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
938 ip->i_d.di_gid, fa->fsx_projid,
939 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
940 if (code)
941 return code;
942 }
943
944 /*
945 * For the other attributes, we acquire the inode lock and
946 * first do an error checking pass.
947 */
948 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
949 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
950 if (code)
951 goto error_return;
952
953 lock_flags = XFS_ILOCK_EXCL;
954 xfs_ilock(ip, lock_flags);
955
956 /*
957 * CAP_FOWNER overrides the following restrictions:
958 *
959 * The user ID of the calling process must be equal
960 * to the file owner ID, except in cases where the
961 * CAP_FSETID capability is applicable.
962 */
963 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
964 code = XFS_ERROR(EPERM);
965 goto error_return;
966 }
967
968 /*
969 * Do a quota reservation only if projid is actually going to change.
970 */
971 if (mask & FSX_PROJID) {
972 if (XFS_IS_QUOTA_RUNNING(mp) &&
973 XFS_IS_PQUOTA_ON(mp) &&
974 xfs_get_projid(ip) != fa->fsx_projid) {
975 ASSERT(tp);
976 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
977 capable(CAP_FOWNER) ?
978 XFS_QMOPT_FORCE_RES : 0);
979 if (code) /* out of quota */
980 goto error_return;
981 }
982 }
983
984 if (mask & FSX_EXTSIZE) {
985 /*
986 * Can't change extent size if any extents are allocated.
987 */
988 if (ip->i_d.di_nextents &&
989 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
990 fa->fsx_extsize)) {
991 code = XFS_ERROR(EINVAL); /* EFBIG? */
992 goto error_return;
993 }
994
995 /*
996 * Extent size must be a multiple of the appropriate block
997 * size, if set at all. It must also be smaller than the
998 * maximum extent size supported by the filesystem.
999 *
1000 * Also, for non-realtime files, limit the extent size hint to
1001 * half the size of the AGs in the filesystem so alignment
1002 * doesn't result in extents larger than an AG.
1003 */
1004 if (fa->fsx_extsize != 0) {
1005 xfs_extlen_t size;
1006 xfs_fsblock_t extsize_fsb;
1007
1008 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1009 if (extsize_fsb > MAXEXTLEN) {
1010 code = XFS_ERROR(EINVAL);
1011 goto error_return;
1012 }
1013
1014 if (XFS_IS_REALTIME_INODE(ip) ||
1015 ((mask & FSX_XFLAGS) &&
1016 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1017 size = mp->m_sb.sb_rextsize <<
1018 mp->m_sb.sb_blocklog;
1019 } else {
1020 size = mp->m_sb.sb_blocksize;
1021 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1022 code = XFS_ERROR(EINVAL);
1023 goto error_return;
1024 }
1025 }
1026
1027 if (fa->fsx_extsize % size) {
1028 code = XFS_ERROR(EINVAL);
1029 goto error_return;
1030 }
1031 }
1032 }
1033
1034
1035 if (mask & FSX_XFLAGS) {
1036 /*
1037 * Can't change realtime flag if any extents are allocated.
1038 */
1039 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1040 (XFS_IS_REALTIME_INODE(ip)) !=
1041 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1042 code = XFS_ERROR(EINVAL); /* EFBIG? */
1043 goto error_return;
1044 }
1045
1046 /*
1047 * If realtime flag is set then must have realtime data.
1048 */
1049 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1050 if ((mp->m_sb.sb_rblocks == 0) ||
1051 (mp->m_sb.sb_rextsize == 0) ||
1052 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1053 code = XFS_ERROR(EINVAL);
1054 goto error_return;
1055 }
1056 }
1057
1058 /*
1059 * Can't modify an immutable/append-only file unless
1060 * we have appropriate permission.
1061 */
1062 if ((ip->i_d.di_flags &
1063 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1064 (fa->fsx_xflags &
1065 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1066 !capable(CAP_LINUX_IMMUTABLE)) {
1067 code = XFS_ERROR(EPERM);
1068 goto error_return;
1069 }
1070 }
1071
1072 xfs_trans_ijoin(tp, ip);
1073
1074 /*
1075 * Change file ownership. Must be the owner or privileged.
1076 */
1077 if (mask & FSX_PROJID) {
1078 /*
1079 * CAP_FSETID overrides the following restrictions:
1080 *
1081 * The set-user-ID and set-group-ID bits of a file will be
1082 * cleared upon successful return from chown()
1083 */
1084 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1085 !capable(CAP_FSETID))
1086 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1087
1088 /*
1089 * Change the ownerships and register quota modifications
1090 * in the transaction.
1091 */
1092 if (xfs_get_projid(ip) != fa->fsx_projid) {
1093 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1094 olddquot = xfs_qm_vop_chown(tp, ip,
1095 &ip->i_gdquot, gdqp);
1096 }
1097 xfs_set_projid(ip, fa->fsx_projid);
1098
1099 /*
1100 * We may have to rev the inode as well as
1101 * the superblock version number since projids didn't
1102 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1103 */
1104 if (ip->i_d.di_version == 1)
1105 xfs_bump_ino_vers2(tp, ip);
1106 }
1107
1108 }
1109
1110 if (mask & FSX_EXTSIZE)
1111 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1112 if (mask & FSX_XFLAGS) {
1113 xfs_set_diflags(ip, fa->fsx_xflags);
1114 xfs_diflags_to_linux(ip);
1115 }
1116
1117 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1118 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1119
1120 XFS_STATS_INC(xs_ig_attrchg);
1121
1122 /*
1123 * If this is a synchronous mount, make sure that the
1124 * transaction goes to disk before returning to the user.
1125 * This is slightly sub-optimal in that truncates require
1126 * two sync transactions instead of one for wsync filesystems.
1127 * One for the truncate and one for the timestamps since we
1128 * don't want to change the timestamps unless we're sure the
1129 * truncate worked. Truncates are less than 1% of the laddis
1130 * mix so this probably isn't worth the trouble to optimize.
1131 */
1132 if (mp->m_flags & XFS_MOUNT_WSYNC)
1133 xfs_trans_set_sync(tp);
1134 code = xfs_trans_commit(tp, 0);
1135 xfs_iunlock(ip, lock_flags);
1136
1137 /*
1138 * Release any dquot(s) the inode had kept before chown.
1139 */
1140 xfs_qm_dqrele(olddquot);
1141 xfs_qm_dqrele(udqp);
1142 xfs_qm_dqrele(gdqp);
1143
1144 return code;
1145
1146 error_return:
1147 xfs_qm_dqrele(udqp);
1148 xfs_qm_dqrele(gdqp);
1149 xfs_trans_cancel(tp, 0);
1150 if (lock_flags)
1151 xfs_iunlock(ip, lock_flags);
1152 return code;
1153}
1154
1155STATIC int
1156xfs_ioc_fssetxattr(
1157 xfs_inode_t *ip,
1158 struct file *filp,
1159 void __user *arg)
1160{
1161 struct fsxattr fa;
1162 unsigned int mask;
1163
1164 if (copy_from_user(&fa, arg, sizeof(fa)))
1165 return -EFAULT;
1166
1167 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1168 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1169 mask |= FSX_NONBLOCK;
1170
1171 return -xfs_ioctl_setattr(ip, &fa, mask);
1172}
1173
1174STATIC int
1175xfs_ioc_getxflags(
1176 xfs_inode_t *ip,
1177 void __user *arg)
1178{
1179 unsigned int flags;
1180
1181 flags = xfs_di2lxflags(ip->i_d.di_flags);
1182 if (copy_to_user(arg, &flags, sizeof(flags)))
1183 return -EFAULT;
1184 return 0;
1185}
1186
1187STATIC int
1188xfs_ioc_setxflags(
1189 xfs_inode_t *ip,
1190 struct file *filp,
1191 void __user *arg)
1192{
1193 struct fsxattr fa;
1194 unsigned int flags;
1195 unsigned int mask;
1196
1197 if (copy_from_user(&flags, arg, sizeof(flags)))
1198 return -EFAULT;
1199
1200 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1201 FS_NOATIME_FL | FS_NODUMP_FL | \
1202 FS_SYNC_FL))
1203 return -EOPNOTSUPP;
1204
1205 mask = FSX_XFLAGS;
1206 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1207 mask |= FSX_NONBLOCK;
1208 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1209
1210 return -xfs_ioctl_setattr(ip, &fa, mask);
1211}
1212
1213STATIC int
1214xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1215{
1216 struct getbmap __user *base = *ap;
1217
1218 /* copy only getbmap portion (not getbmapx) */
1219 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1220 return XFS_ERROR(EFAULT);
1221
1222 *ap += sizeof(struct getbmap);
1223 return 0;
1224}
1225
1226STATIC int
1227xfs_ioc_getbmap(
1228 struct xfs_inode *ip,
1229 int ioflags,
1230 unsigned int cmd,
1231 void __user *arg)
1232{
1233 struct getbmapx bmx;
1234 int error;
1235
1236 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1237 return -XFS_ERROR(EFAULT);
1238
1239 if (bmx.bmv_count < 2)
1240 return -XFS_ERROR(EINVAL);
1241
1242 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1243 if (ioflags & IO_INVIS)
1244 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1245
1246 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1247 (struct getbmap *)arg+1);
1248 if (error)
1249 return -error;
1250
1251 /* copy back header - only size of getbmap */
1252 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1253 return -XFS_ERROR(EFAULT);
1254 return 0;
1255}
1256
1257STATIC int
1258xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1259{
1260 struct getbmapx __user *base = *ap;
1261
1262 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1263 return XFS_ERROR(EFAULT);
1264
1265 *ap += sizeof(struct getbmapx);
1266 return 0;
1267}
1268
1269STATIC int
1270xfs_ioc_getbmapx(
1271 struct xfs_inode *ip,
1272 void __user *arg)
1273{
1274 struct getbmapx bmx;
1275 int error;
1276
1277 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1278 return -XFS_ERROR(EFAULT);
1279
1280 if (bmx.bmv_count < 2)
1281 return -XFS_ERROR(EINVAL);
1282
1283 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1284 return -XFS_ERROR(EINVAL);
1285
1286 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1287 (struct getbmapx *)arg+1);
1288 if (error)
1289 return -error;
1290
1291 /* copy back header */
1292 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1293 return -XFS_ERROR(EFAULT);
1294
1295 return 0;
1296}
1297
1298/*
1299 * Note: some of the ioctl's return positive numbers as a
1300 * byte count indicating success, such as readlink_by_handle.
1301 * So we don't "sign flip" like most other routines. This means
1302 * true errors need to be returned as a negative value.
1303 */
1304long
1305xfs_file_ioctl(
1306 struct file *filp,
1307 unsigned int cmd,
1308 unsigned long p)
1309{
1310 struct inode *inode = filp->f_path.dentry->d_inode;
1311 struct xfs_inode *ip = XFS_I(inode);
1312 struct xfs_mount *mp = ip->i_mount;
1313 void __user *arg = (void __user *)p;
1314 int ioflags = 0;
1315 int error;
1316
1317 if (filp->f_mode & FMODE_NOCMTIME)
1318 ioflags |= IO_INVIS;
1319
1320 trace_xfs_file_ioctl(ip);
1321
1322 switch (cmd) {
1323 case FITRIM:
1324 return xfs_ioc_trim(mp, arg);
1325 case XFS_IOC_ALLOCSP:
1326 case XFS_IOC_FREESP:
1327 case XFS_IOC_RESVSP:
1328 case XFS_IOC_UNRESVSP:
1329 case XFS_IOC_ALLOCSP64:
1330 case XFS_IOC_FREESP64:
1331 case XFS_IOC_RESVSP64:
1332 case XFS_IOC_UNRESVSP64:
1333 case XFS_IOC_ZERO_RANGE: {
1334 xfs_flock64_t bf;
1335
1336 if (copy_from_user(&bf, arg, sizeof(bf)))
1337 return -XFS_ERROR(EFAULT);
1338 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1339 }
1340 case XFS_IOC_DIOINFO: {
1341 struct dioattr da;
1342 xfs_buftarg_t *target =
1343 XFS_IS_REALTIME_INODE(ip) ?
1344 mp->m_rtdev_targp : mp->m_ddev_targp;
1345
1346 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1347 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1348
1349 if (copy_to_user(arg, &da, sizeof(da)))
1350 return -XFS_ERROR(EFAULT);
1351 return 0;
1352 }
1353
1354 case XFS_IOC_FSBULKSTAT_SINGLE:
1355 case XFS_IOC_FSBULKSTAT:
1356 case XFS_IOC_FSINUMBERS:
1357 return xfs_ioc_bulkstat(mp, cmd, arg);
1358
1359 case XFS_IOC_FSGEOMETRY_V1:
1360 return xfs_ioc_fsgeometry_v1(mp, arg);
1361
1362 case XFS_IOC_FSGEOMETRY:
1363 return xfs_ioc_fsgeometry(mp, arg);
1364
1365 case XFS_IOC_GETVERSION:
1366 return put_user(inode->i_generation, (int __user *)arg);
1367
1368 case XFS_IOC_FSGETXATTR:
1369 return xfs_ioc_fsgetxattr(ip, 0, arg);
1370 case XFS_IOC_FSGETXATTRA:
1371 return xfs_ioc_fsgetxattr(ip, 1, arg);
1372 case XFS_IOC_FSSETXATTR:
1373 return xfs_ioc_fssetxattr(ip, filp, arg);
1374 case XFS_IOC_GETXFLAGS:
1375 return xfs_ioc_getxflags(ip, arg);
1376 case XFS_IOC_SETXFLAGS:
1377 return xfs_ioc_setxflags(ip, filp, arg);
1378
1379 case XFS_IOC_FSSETDM: {
1380 struct fsdmidata dmi;
1381
1382 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1383 return -XFS_ERROR(EFAULT);
1384
1385 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1386 dmi.fsd_dmstate);
1387 return -error;
1388 }
1389
1390 case XFS_IOC_GETBMAP:
1391 case XFS_IOC_GETBMAPA:
1392 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1393
1394 case XFS_IOC_GETBMAPX:
1395 return xfs_ioc_getbmapx(ip, arg);
1396
1397 case XFS_IOC_FD_TO_HANDLE:
1398 case XFS_IOC_PATH_TO_HANDLE:
1399 case XFS_IOC_PATH_TO_FSHANDLE: {
1400 xfs_fsop_handlereq_t hreq;
1401
1402 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1403 return -XFS_ERROR(EFAULT);
1404 return xfs_find_handle(cmd, &hreq);
1405 }
1406 case XFS_IOC_OPEN_BY_HANDLE: {
1407 xfs_fsop_handlereq_t hreq;
1408
1409 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1410 return -XFS_ERROR(EFAULT);
1411 return xfs_open_by_handle(filp, &hreq);
1412 }
1413 case XFS_IOC_FSSETDM_BY_HANDLE:
1414 return xfs_fssetdm_by_handle(filp, arg);
1415
1416 case XFS_IOC_READLINK_BY_HANDLE: {
1417 xfs_fsop_handlereq_t hreq;
1418
1419 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1420 return -XFS_ERROR(EFAULT);
1421 return xfs_readlink_by_handle(filp, &hreq);
1422 }
1423 case XFS_IOC_ATTRLIST_BY_HANDLE:
1424 return xfs_attrlist_by_handle(filp, arg);
1425
1426 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1427 return xfs_attrmulti_by_handle(filp, arg);
1428
1429 case XFS_IOC_SWAPEXT: {
1430 struct xfs_swapext sxp;
1431
1432 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1433 return -XFS_ERROR(EFAULT);
1434 error = xfs_swapext(&sxp);
1435 return -error;
1436 }
1437
1438 case XFS_IOC_FSCOUNTS: {
1439 xfs_fsop_counts_t out;
1440
1441 error = xfs_fs_counts(mp, &out);
1442 if (error)
1443 return -error;
1444
1445 if (copy_to_user(arg, &out, sizeof(out)))
1446 return -XFS_ERROR(EFAULT);
1447 return 0;
1448 }
1449
1450 case XFS_IOC_SET_RESBLKS: {
1451 xfs_fsop_resblks_t inout;
1452 __uint64_t in;
1453
1454 if (!capable(CAP_SYS_ADMIN))
1455 return -EPERM;
1456
1457 if (mp->m_flags & XFS_MOUNT_RDONLY)
1458 return -XFS_ERROR(EROFS);
1459
1460 if (copy_from_user(&inout, arg, sizeof(inout)))
1461 return -XFS_ERROR(EFAULT);
1462
1463 /* input parameter is passed in resblks field of structure */
1464 in = inout.resblks;
1465 error = xfs_reserve_blocks(mp, &in, &inout);
1466 if (error)
1467 return -error;
1468
1469 if (copy_to_user(arg, &inout, sizeof(inout)))
1470 return -XFS_ERROR(EFAULT);
1471 return 0;
1472 }
1473
1474 case XFS_IOC_GET_RESBLKS: {
1475 xfs_fsop_resblks_t out;
1476
1477 if (!capable(CAP_SYS_ADMIN))
1478 return -EPERM;
1479
1480 error = xfs_reserve_blocks(mp, NULL, &out);
1481 if (error)
1482 return -error;
1483
1484 if (copy_to_user(arg, &out, sizeof(out)))
1485 return -XFS_ERROR(EFAULT);
1486
1487 return 0;
1488 }
1489
1490 case XFS_IOC_FSGROWFSDATA: {
1491 xfs_growfs_data_t in;
1492
1493 if (copy_from_user(&in, arg, sizeof(in)))
1494 return -XFS_ERROR(EFAULT);
1495
1496 error = xfs_growfs_data(mp, &in);
1497 return -error;
1498 }
1499
1500 case XFS_IOC_FSGROWFSLOG: {
1501 xfs_growfs_log_t in;
1502
1503 if (copy_from_user(&in, arg, sizeof(in)))
1504 return -XFS_ERROR(EFAULT);
1505
1506 error = xfs_growfs_log(mp, &in);
1507 return -error;
1508 }
1509
1510 case XFS_IOC_FSGROWFSRT: {
1511 xfs_growfs_rt_t in;
1512
1513 if (copy_from_user(&in, arg, sizeof(in)))
1514 return -XFS_ERROR(EFAULT);
1515
1516 error = xfs_growfs_rt(mp, &in);
1517 return -error;
1518 }
1519
1520 case XFS_IOC_GOINGDOWN: {
1521 __uint32_t in;
1522
1523 if (!capable(CAP_SYS_ADMIN))
1524 return -EPERM;
1525
1526 if (get_user(in, (__uint32_t __user *)arg))
1527 return -XFS_ERROR(EFAULT);
1528
1529 error = xfs_fs_goingdown(mp, in);
1530 return -error;
1531 }
1532
1533 case XFS_IOC_ERROR_INJECTION: {
1534 xfs_error_injection_t in;
1535
1536 if (!capable(CAP_SYS_ADMIN))
1537 return -EPERM;
1538
1539 if (copy_from_user(&in, arg, sizeof(in)))
1540 return -XFS_ERROR(EFAULT);
1541
1542 error = xfs_errortag_add(in.errtag, mp);
1543 return -error;
1544 }
1545
1546 case XFS_IOC_ERROR_CLEARALL:
1547 if (!capable(CAP_SYS_ADMIN))
1548 return -EPERM;
1549
1550 error = xfs_errortag_clearall(mp, 1);
1551 return -error;
1552
1553 default:
1554 return -ENOTTY;
1555 }
1556}
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_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_mount.h"
25#include "xfs_inode.h"
26#include "xfs_ioctl.h"
27#include "xfs_alloc.h"
28#include "xfs_rtalloc.h"
29#include "xfs_itable.h"
30#include "xfs_error.h"
31#include "xfs_attr.h"
32#include "xfs_bmap.h"
33#include "xfs_bmap_util.h"
34#include "xfs_fsops.h"
35#include "xfs_discard.h"
36#include "xfs_quota.h"
37#include "xfs_export.h"
38#include "xfs_trace.h"
39#include "xfs_icache.h"
40#include "xfs_symlink.h"
41#include "xfs_trans.h"
42#include "xfs_pnfs.h"
43#include "xfs_acl.h"
44
45#include <linux/capability.h>
46#include <linux/dcache.h>
47#include <linux/mount.h>
48#include <linux/namei.h>
49#include <linux/pagemap.h>
50#include <linux/slab.h>
51#include <linux/exportfs.h>
52
53/*
54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
55 * a file or fs handle.
56 *
57 * XFS_IOC_PATH_TO_FSHANDLE
58 * returns fs handle for a mount point or path within that mount point
59 * XFS_IOC_FD_TO_HANDLE
60 * returns full handle for a FD opened in user space
61 * XFS_IOC_PATH_TO_HANDLE
62 * returns full handle for a path
63 */
64int
65xfs_find_handle(
66 unsigned int cmd,
67 xfs_fsop_handlereq_t *hreq)
68{
69 int hsize;
70 xfs_handle_t handle;
71 struct inode *inode;
72 struct fd f = {NULL};
73 struct path path;
74 int error;
75 struct xfs_inode *ip;
76
77 if (cmd == XFS_IOC_FD_TO_HANDLE) {
78 f = fdget(hreq->fd);
79 if (!f.file)
80 return -EBADF;
81 inode = file_inode(f.file);
82 } else {
83 error = user_lpath((const char __user *)hreq->path, &path);
84 if (error)
85 return error;
86 inode = d_inode(path.dentry);
87 }
88 ip = XFS_I(inode);
89
90 /*
91 * We can only generate handles for inodes residing on a XFS filesystem,
92 * and only for regular files, directories or symbolic links.
93 */
94 error = -EINVAL;
95 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
96 goto out_put;
97
98 error = -EBADF;
99 if (!S_ISREG(inode->i_mode) &&
100 !S_ISDIR(inode->i_mode) &&
101 !S_ISLNK(inode->i_mode))
102 goto out_put;
103
104
105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
106
107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
108 /*
109 * This handle only contains an fsid, zero the rest.
110 */
111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
112 hsize = sizeof(xfs_fsid_t);
113 } else {
114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
115 sizeof(handle.ha_fid.fid_len);
116 handle.ha_fid.fid_pad = 0;
117 handle.ha_fid.fid_gen = inode->i_generation;
118 handle.ha_fid.fid_ino = ip->i_ino;
119
120 hsize = XFS_HSIZE(handle);
121 }
122
123 error = -EFAULT;
124 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
126 goto out_put;
127
128 error = 0;
129
130 out_put:
131 if (cmd == XFS_IOC_FD_TO_HANDLE)
132 fdput(f);
133 else
134 path_put(&path);
135 return error;
136}
137
138/*
139 * No need to do permission checks on the various pathname components
140 * as the handle operations are privileged.
141 */
142STATIC int
143xfs_handle_acceptable(
144 void *context,
145 struct dentry *dentry)
146{
147 return 1;
148}
149
150/*
151 * Convert userspace handle data into a dentry.
152 */
153struct dentry *
154xfs_handle_to_dentry(
155 struct file *parfilp,
156 void __user *uhandle,
157 u32 hlen)
158{
159 xfs_handle_t handle;
160 struct xfs_fid64 fid;
161
162 /*
163 * Only allow handle opens under a directory.
164 */
165 if (!S_ISDIR(file_inode(parfilp)->i_mode))
166 return ERR_PTR(-ENOTDIR);
167
168 if (hlen != sizeof(xfs_handle_t))
169 return ERR_PTR(-EINVAL);
170 if (copy_from_user(&handle, uhandle, hlen))
171 return ERR_PTR(-EFAULT);
172 if (handle.ha_fid.fid_len !=
173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
174 return ERR_PTR(-EINVAL);
175
176 memset(&fid, 0, sizeof(struct fid));
177 fid.ino = handle.ha_fid.fid_ino;
178 fid.gen = handle.ha_fid.fid_gen;
179
180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
182 xfs_handle_acceptable, NULL);
183}
184
185STATIC struct dentry *
186xfs_handlereq_to_dentry(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
189{
190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
191}
192
193int
194xfs_open_by_handle(
195 struct file *parfilp,
196 xfs_fsop_handlereq_t *hreq)
197{
198 const struct cred *cred = current_cred();
199 int error;
200 int fd;
201 int permflag;
202 struct file *filp;
203 struct inode *inode;
204 struct dentry *dentry;
205 fmode_t fmode;
206 struct path path;
207
208 if (!capable(CAP_SYS_ADMIN))
209 return -EPERM;
210
211 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
212 if (IS_ERR(dentry))
213 return PTR_ERR(dentry);
214 inode = d_inode(dentry);
215
216 /* Restrict xfs_open_by_handle to directories & regular files. */
217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
218 error = -EPERM;
219 goto out_dput;
220 }
221
222#if BITS_PER_LONG != 32
223 hreq->oflags |= O_LARGEFILE;
224#endif
225
226 permflag = hreq->oflags;
227 fmode = OPEN_FMODE(permflag);
228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
230 error = -EPERM;
231 goto out_dput;
232 }
233
234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
235 error = -EPERM;
236 goto out_dput;
237 }
238
239 /* Can't write directories. */
240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
241 error = -EISDIR;
242 goto out_dput;
243 }
244
245 fd = get_unused_fd_flags(0);
246 if (fd < 0) {
247 error = fd;
248 goto out_dput;
249 }
250
251 path.mnt = parfilp->f_path.mnt;
252 path.dentry = dentry;
253 filp = dentry_open(&path, hreq->oflags, cred);
254 dput(dentry);
255 if (IS_ERR(filp)) {
256 put_unused_fd(fd);
257 return PTR_ERR(filp);
258 }
259
260 if (S_ISREG(inode->i_mode)) {
261 filp->f_flags |= O_NOATIME;
262 filp->f_mode |= FMODE_NOCMTIME;
263 }
264
265 fd_install(fd, filp);
266 return fd;
267
268 out_dput:
269 dput(dentry);
270 return error;
271}
272
273int
274xfs_readlink_by_handle(
275 struct file *parfilp,
276 xfs_fsop_handlereq_t *hreq)
277{
278 struct dentry *dentry;
279 __u32 olen;
280 int error;
281
282 if (!capable(CAP_SYS_ADMIN))
283 return -EPERM;
284
285 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
286 if (IS_ERR(dentry))
287 return PTR_ERR(dentry);
288
289 /* Restrict this handle operation to symlinks only. */
290 if (!d_is_symlink(dentry)) {
291 error = -EINVAL;
292 goto out_dput;
293 }
294
295 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
296 error = -EFAULT;
297 goto out_dput;
298 }
299
300 error = vfs_readlink(dentry, hreq->ohandle, olen);
301
302 out_dput:
303 dput(dentry);
304 return error;
305}
306
307int
308xfs_set_dmattrs(
309 xfs_inode_t *ip,
310 u_int evmask,
311 u_int16_t state)
312{
313 xfs_mount_t *mp = ip->i_mount;
314 xfs_trans_t *tp;
315 int error;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -EPERM;
319
320 if (XFS_FORCED_SHUTDOWN(mp))
321 return -EIO;
322
323 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
324 if (error)
325 return error;
326
327 xfs_ilock(ip, XFS_ILOCK_EXCL);
328 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
329
330 ip->i_d.di_dmevmask = evmask;
331 ip->i_d.di_dmstate = state;
332
333 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
334 error = xfs_trans_commit(tp);
335
336 return error;
337}
338
339STATIC int
340xfs_fssetdm_by_handle(
341 struct file *parfilp,
342 void __user *arg)
343{
344 int error;
345 struct fsdmidata fsd;
346 xfs_fsop_setdm_handlereq_t dmhreq;
347 struct dentry *dentry;
348
349 if (!capable(CAP_MKNOD))
350 return -EPERM;
351 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
352 return -EFAULT;
353
354 error = mnt_want_write_file(parfilp);
355 if (error)
356 return error;
357
358 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
359 if (IS_ERR(dentry)) {
360 mnt_drop_write_file(parfilp);
361 return PTR_ERR(dentry);
362 }
363
364 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
365 error = -EPERM;
366 goto out;
367 }
368
369 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
370 error = -EFAULT;
371 goto out;
372 }
373
374 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
375 fsd.fsd_dmstate);
376
377 out:
378 mnt_drop_write_file(parfilp);
379 dput(dentry);
380 return error;
381}
382
383STATIC int
384xfs_attrlist_by_handle(
385 struct file *parfilp,
386 void __user *arg)
387{
388 int error = -ENOMEM;
389 attrlist_cursor_kern_t *cursor;
390 struct xfs_fsop_attrlist_handlereq __user *p = arg;
391 xfs_fsop_attrlist_handlereq_t al_hreq;
392 struct dentry *dentry;
393 char *kbuf;
394
395 if (!capable(CAP_SYS_ADMIN))
396 return -EPERM;
397 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
398 return -EFAULT;
399 if (al_hreq.buflen < sizeof(struct attrlist) ||
400 al_hreq.buflen > XFS_XATTR_LIST_MAX)
401 return -EINVAL;
402
403 /*
404 * Reject flags, only allow namespaces.
405 */
406 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
407 return -EINVAL;
408
409 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
410 if (IS_ERR(dentry))
411 return PTR_ERR(dentry);
412
413 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
414 if (!kbuf)
415 goto out_dput;
416
417 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
418 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
419 al_hreq.flags, cursor);
420 if (error)
421 goto out_kfree;
422
423 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
424 error = -EFAULT;
425 goto out_kfree;
426 }
427
428 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
429 error = -EFAULT;
430
431out_kfree:
432 kmem_free(kbuf);
433out_dput:
434 dput(dentry);
435 return error;
436}
437
438int
439xfs_attrmulti_attr_get(
440 struct inode *inode,
441 unsigned char *name,
442 unsigned char __user *ubuf,
443 __uint32_t *len,
444 __uint32_t flags)
445{
446 unsigned char *kbuf;
447 int error = -EFAULT;
448
449 if (*len > XFS_XATTR_SIZE_MAX)
450 return -EINVAL;
451 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
452 if (!kbuf)
453 return -ENOMEM;
454
455 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
456 if (error)
457 goto out_kfree;
458
459 if (copy_to_user(ubuf, kbuf, *len))
460 error = -EFAULT;
461
462out_kfree:
463 kmem_free(kbuf);
464 return error;
465}
466
467int
468xfs_attrmulti_attr_set(
469 struct inode *inode,
470 unsigned char *name,
471 const unsigned char __user *ubuf,
472 __uint32_t len,
473 __uint32_t flags)
474{
475 unsigned char *kbuf;
476 int error;
477
478 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
479 return -EPERM;
480 if (len > XFS_XATTR_SIZE_MAX)
481 return -EINVAL;
482
483 kbuf = memdup_user(ubuf, len);
484 if (IS_ERR(kbuf))
485 return PTR_ERR(kbuf);
486
487 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
488 if (!error)
489 xfs_forget_acl(inode, name, flags);
490 kfree(kbuf);
491 return error;
492}
493
494int
495xfs_attrmulti_attr_remove(
496 struct inode *inode,
497 unsigned char *name,
498 __uint32_t flags)
499{
500 int error;
501
502 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
503 return -EPERM;
504 error = xfs_attr_remove(XFS_I(inode), name, flags);
505 if (!error)
506 xfs_forget_acl(inode, name, flags);
507 return error;
508}
509
510STATIC int
511xfs_attrmulti_by_handle(
512 struct file *parfilp,
513 void __user *arg)
514{
515 int error;
516 xfs_attr_multiop_t *ops;
517 xfs_fsop_attrmulti_handlereq_t am_hreq;
518 struct dentry *dentry;
519 unsigned int i, size;
520 unsigned char *attr_name;
521
522 if (!capable(CAP_SYS_ADMIN))
523 return -EPERM;
524 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
525 return -EFAULT;
526
527 /* overflow check */
528 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
529 return -E2BIG;
530
531 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
532 if (IS_ERR(dentry))
533 return PTR_ERR(dentry);
534
535 error = -E2BIG;
536 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
537 if (!size || size > 16 * PAGE_SIZE)
538 goto out_dput;
539
540 ops = memdup_user(am_hreq.ops, size);
541 if (IS_ERR(ops)) {
542 error = PTR_ERR(ops);
543 goto out_dput;
544 }
545
546 error = -ENOMEM;
547 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
548 if (!attr_name)
549 goto out_kfree_ops;
550
551 error = 0;
552 for (i = 0; i < am_hreq.opcount; i++) {
553 ops[i].am_error = strncpy_from_user((char *)attr_name,
554 ops[i].am_attrname, MAXNAMELEN);
555 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
556 error = -ERANGE;
557 if (ops[i].am_error < 0)
558 break;
559
560 switch (ops[i].am_opcode) {
561 case ATTR_OP_GET:
562 ops[i].am_error = xfs_attrmulti_attr_get(
563 d_inode(dentry), attr_name,
564 ops[i].am_attrvalue, &ops[i].am_length,
565 ops[i].am_flags);
566 break;
567 case ATTR_OP_SET:
568 ops[i].am_error = mnt_want_write_file(parfilp);
569 if (ops[i].am_error)
570 break;
571 ops[i].am_error = xfs_attrmulti_attr_set(
572 d_inode(dentry), attr_name,
573 ops[i].am_attrvalue, ops[i].am_length,
574 ops[i].am_flags);
575 mnt_drop_write_file(parfilp);
576 break;
577 case ATTR_OP_REMOVE:
578 ops[i].am_error = mnt_want_write_file(parfilp);
579 if (ops[i].am_error)
580 break;
581 ops[i].am_error = xfs_attrmulti_attr_remove(
582 d_inode(dentry), attr_name,
583 ops[i].am_flags);
584 mnt_drop_write_file(parfilp);
585 break;
586 default:
587 ops[i].am_error = -EINVAL;
588 }
589 }
590
591 if (copy_to_user(am_hreq.ops, ops, size))
592 error = -EFAULT;
593
594 kfree(attr_name);
595 out_kfree_ops:
596 kfree(ops);
597 out_dput:
598 dput(dentry);
599 return error;
600}
601
602int
603xfs_ioc_space(
604 struct file *filp,
605 unsigned int cmd,
606 xfs_flock64_t *bf)
607{
608 struct inode *inode = file_inode(filp);
609 struct xfs_inode *ip = XFS_I(inode);
610 struct iattr iattr;
611 enum xfs_prealloc_flags flags = 0;
612 uint iolock = XFS_IOLOCK_EXCL;
613 int error;
614
615 /*
616 * Only allow the sys admin to reserve space unless
617 * unwritten extents are enabled.
618 */
619 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
620 !capable(CAP_SYS_ADMIN))
621 return -EPERM;
622
623 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
624 return -EPERM;
625
626 if (!(filp->f_mode & FMODE_WRITE))
627 return -EBADF;
628
629 if (!S_ISREG(inode->i_mode))
630 return -EINVAL;
631
632 if (filp->f_flags & O_DSYNC)
633 flags |= XFS_PREALLOC_SYNC;
634 if (filp->f_mode & FMODE_NOCMTIME)
635 flags |= XFS_PREALLOC_INVISIBLE;
636
637 error = mnt_want_write_file(filp);
638 if (error)
639 return error;
640
641 xfs_ilock(ip, iolock);
642 error = xfs_break_layouts(inode, &iolock);
643 if (error)
644 goto out_unlock;
645
646 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
647 iolock |= XFS_MMAPLOCK_EXCL;
648
649 switch (bf->l_whence) {
650 case 0: /*SEEK_SET*/
651 break;
652 case 1: /*SEEK_CUR*/
653 bf->l_start += filp->f_pos;
654 break;
655 case 2: /*SEEK_END*/
656 bf->l_start += XFS_ISIZE(ip);
657 break;
658 default:
659 error = -EINVAL;
660 goto out_unlock;
661 }
662
663 /*
664 * length of <= 0 for resv/unresv/zero is invalid. length for
665 * alloc/free is ignored completely and we have no idea what userspace
666 * might have set it to, so set it to zero to allow range
667 * checks to pass.
668 */
669 switch (cmd) {
670 case XFS_IOC_ZERO_RANGE:
671 case XFS_IOC_RESVSP:
672 case XFS_IOC_RESVSP64:
673 case XFS_IOC_UNRESVSP:
674 case XFS_IOC_UNRESVSP64:
675 if (bf->l_len <= 0) {
676 error = -EINVAL;
677 goto out_unlock;
678 }
679 break;
680 default:
681 bf->l_len = 0;
682 break;
683 }
684
685 if (bf->l_start < 0 ||
686 bf->l_start > inode->i_sb->s_maxbytes ||
687 bf->l_start + bf->l_len < 0 ||
688 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
689 error = -EINVAL;
690 goto out_unlock;
691 }
692
693 switch (cmd) {
694 case XFS_IOC_ZERO_RANGE:
695 flags |= XFS_PREALLOC_SET;
696 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
697 break;
698 case XFS_IOC_RESVSP:
699 case XFS_IOC_RESVSP64:
700 flags |= XFS_PREALLOC_SET;
701 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
702 XFS_BMAPI_PREALLOC);
703 break;
704 case XFS_IOC_UNRESVSP:
705 case XFS_IOC_UNRESVSP64:
706 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
707 break;
708 case XFS_IOC_ALLOCSP:
709 case XFS_IOC_ALLOCSP64:
710 case XFS_IOC_FREESP:
711 case XFS_IOC_FREESP64:
712 flags |= XFS_PREALLOC_CLEAR;
713 if (bf->l_start > XFS_ISIZE(ip)) {
714 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
715 bf->l_start - XFS_ISIZE(ip), 0);
716 if (error)
717 goto out_unlock;
718 }
719
720 iattr.ia_valid = ATTR_SIZE;
721 iattr.ia_size = bf->l_start;
722
723 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
724 break;
725 default:
726 ASSERT(0);
727 error = -EINVAL;
728 }
729
730 if (error)
731 goto out_unlock;
732
733 error = xfs_update_prealloc_flags(ip, flags);
734
735out_unlock:
736 xfs_iunlock(ip, iolock);
737 mnt_drop_write_file(filp);
738 return error;
739}
740
741STATIC int
742xfs_ioc_bulkstat(
743 xfs_mount_t *mp,
744 unsigned int cmd,
745 void __user *arg)
746{
747 xfs_fsop_bulkreq_t bulkreq;
748 int count; /* # of records returned */
749 xfs_ino_t inlast; /* last inode number */
750 int done;
751 int error;
752
753 /* done = 1 if there are more stats to get and if bulkstat */
754 /* should be called again (unused here, but used in dmapi) */
755
756 if (!capable(CAP_SYS_ADMIN))
757 return -EPERM;
758
759 if (XFS_FORCED_SHUTDOWN(mp))
760 return -EIO;
761
762 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
763 return -EFAULT;
764
765 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
766 return -EFAULT;
767
768 if ((count = bulkreq.icount) <= 0)
769 return -EINVAL;
770
771 if (bulkreq.ubuffer == NULL)
772 return -EINVAL;
773
774 if (cmd == XFS_IOC_FSINUMBERS)
775 error = xfs_inumbers(mp, &inlast, &count,
776 bulkreq.ubuffer, xfs_inumbers_fmt);
777 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
778 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
779 sizeof(xfs_bstat_t), NULL, &done);
780 else /* XFS_IOC_FSBULKSTAT */
781 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
782 sizeof(xfs_bstat_t), bulkreq.ubuffer,
783 &done);
784
785 if (error)
786 return error;
787
788 if (bulkreq.ocount != NULL) {
789 if (copy_to_user(bulkreq.lastip, &inlast,
790 sizeof(xfs_ino_t)))
791 return -EFAULT;
792
793 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
794 return -EFAULT;
795 }
796
797 return 0;
798}
799
800STATIC int
801xfs_ioc_fsgeometry_v1(
802 xfs_mount_t *mp,
803 void __user *arg)
804{
805 xfs_fsop_geom_t fsgeo;
806 int error;
807
808 error = xfs_fs_geometry(mp, &fsgeo, 3);
809 if (error)
810 return error;
811
812 /*
813 * Caller should have passed an argument of type
814 * xfs_fsop_geom_v1_t. This is a proper subset of the
815 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
816 */
817 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
818 return -EFAULT;
819 return 0;
820}
821
822STATIC int
823xfs_ioc_fsgeometry(
824 xfs_mount_t *mp,
825 void __user *arg)
826{
827 xfs_fsop_geom_t fsgeo;
828 int error;
829
830 error = xfs_fs_geometry(mp, &fsgeo, 4);
831 if (error)
832 return error;
833
834 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
835 return -EFAULT;
836 return 0;
837}
838
839/*
840 * Linux extended inode flags interface.
841 */
842
843STATIC unsigned int
844xfs_merge_ioc_xflags(
845 unsigned int flags,
846 unsigned int start)
847{
848 unsigned int xflags = start;
849
850 if (flags & FS_IMMUTABLE_FL)
851 xflags |= FS_XFLAG_IMMUTABLE;
852 else
853 xflags &= ~FS_XFLAG_IMMUTABLE;
854 if (flags & FS_APPEND_FL)
855 xflags |= FS_XFLAG_APPEND;
856 else
857 xflags &= ~FS_XFLAG_APPEND;
858 if (flags & FS_SYNC_FL)
859 xflags |= FS_XFLAG_SYNC;
860 else
861 xflags &= ~FS_XFLAG_SYNC;
862 if (flags & FS_NOATIME_FL)
863 xflags |= FS_XFLAG_NOATIME;
864 else
865 xflags &= ~FS_XFLAG_NOATIME;
866 if (flags & FS_NODUMP_FL)
867 xflags |= FS_XFLAG_NODUMP;
868 else
869 xflags &= ~FS_XFLAG_NODUMP;
870
871 return xflags;
872}
873
874STATIC unsigned int
875xfs_di2lxflags(
876 __uint16_t di_flags)
877{
878 unsigned int flags = 0;
879
880 if (di_flags & XFS_DIFLAG_IMMUTABLE)
881 flags |= FS_IMMUTABLE_FL;
882 if (di_flags & XFS_DIFLAG_APPEND)
883 flags |= FS_APPEND_FL;
884 if (di_flags & XFS_DIFLAG_SYNC)
885 flags |= FS_SYNC_FL;
886 if (di_flags & XFS_DIFLAG_NOATIME)
887 flags |= FS_NOATIME_FL;
888 if (di_flags & XFS_DIFLAG_NODUMP)
889 flags |= FS_NODUMP_FL;
890 return flags;
891}
892
893STATIC int
894xfs_ioc_fsgetxattr(
895 xfs_inode_t *ip,
896 int attr,
897 void __user *arg)
898{
899 struct fsxattr fa;
900
901 memset(&fa, 0, sizeof(struct fsxattr));
902
903 xfs_ilock(ip, XFS_ILOCK_SHARED);
904 fa.fsx_xflags = xfs_ip2xflags(ip);
905 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
906 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
907 ip->i_mount->m_sb.sb_blocklog;
908 fa.fsx_projid = xfs_get_projid(ip);
909
910 if (attr) {
911 if (ip->i_afp) {
912 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
913 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
914 else
915 fa.fsx_nextents = ip->i_d.di_anextents;
916 } else
917 fa.fsx_nextents = 0;
918 } else {
919 if (ip->i_df.if_flags & XFS_IFEXTENTS)
920 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
921 else
922 fa.fsx_nextents = ip->i_d.di_nextents;
923 }
924 xfs_iunlock(ip, XFS_ILOCK_SHARED);
925
926 if (copy_to_user(arg, &fa, sizeof(fa)))
927 return -EFAULT;
928 return 0;
929}
930
931STATIC void
932xfs_set_diflags(
933 struct xfs_inode *ip,
934 unsigned int xflags)
935{
936 unsigned int di_flags;
937 uint64_t di_flags2;
938
939 /* can't set PREALLOC this way, just preserve it */
940 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
941 if (xflags & FS_XFLAG_IMMUTABLE)
942 di_flags |= XFS_DIFLAG_IMMUTABLE;
943 if (xflags & FS_XFLAG_APPEND)
944 di_flags |= XFS_DIFLAG_APPEND;
945 if (xflags & FS_XFLAG_SYNC)
946 di_flags |= XFS_DIFLAG_SYNC;
947 if (xflags & FS_XFLAG_NOATIME)
948 di_flags |= XFS_DIFLAG_NOATIME;
949 if (xflags & FS_XFLAG_NODUMP)
950 di_flags |= XFS_DIFLAG_NODUMP;
951 if (xflags & FS_XFLAG_NODEFRAG)
952 di_flags |= XFS_DIFLAG_NODEFRAG;
953 if (xflags & FS_XFLAG_FILESTREAM)
954 di_flags |= XFS_DIFLAG_FILESTREAM;
955 if (S_ISDIR(VFS_I(ip)->i_mode)) {
956 if (xflags & FS_XFLAG_RTINHERIT)
957 di_flags |= XFS_DIFLAG_RTINHERIT;
958 if (xflags & FS_XFLAG_NOSYMLINKS)
959 di_flags |= XFS_DIFLAG_NOSYMLINKS;
960 if (xflags & FS_XFLAG_EXTSZINHERIT)
961 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
962 if (xflags & FS_XFLAG_PROJINHERIT)
963 di_flags |= XFS_DIFLAG_PROJINHERIT;
964 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
965 if (xflags & FS_XFLAG_REALTIME)
966 di_flags |= XFS_DIFLAG_REALTIME;
967 if (xflags & FS_XFLAG_EXTSIZE)
968 di_flags |= XFS_DIFLAG_EXTSIZE;
969 }
970 ip->i_d.di_flags = di_flags;
971
972 /* diflags2 only valid for v3 inodes. */
973 if (ip->i_d.di_version < 3)
974 return;
975
976 di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
977 if (xflags & FS_XFLAG_DAX)
978 di_flags2 |= XFS_DIFLAG2_DAX;
979 if (xflags & FS_XFLAG_COWEXTSIZE)
980 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
981
982 ip->i_d.di_flags2 = di_flags2;
983}
984
985STATIC void
986xfs_diflags_to_linux(
987 struct xfs_inode *ip)
988{
989 struct inode *inode = VFS_I(ip);
990 unsigned int xflags = xfs_ip2xflags(ip);
991
992 if (xflags & FS_XFLAG_IMMUTABLE)
993 inode->i_flags |= S_IMMUTABLE;
994 else
995 inode->i_flags &= ~S_IMMUTABLE;
996 if (xflags & FS_XFLAG_APPEND)
997 inode->i_flags |= S_APPEND;
998 else
999 inode->i_flags &= ~S_APPEND;
1000 if (xflags & FS_XFLAG_SYNC)
1001 inode->i_flags |= S_SYNC;
1002 else
1003 inode->i_flags &= ~S_SYNC;
1004 if (xflags & FS_XFLAG_NOATIME)
1005 inode->i_flags |= S_NOATIME;
1006 else
1007 inode->i_flags &= ~S_NOATIME;
1008 if (xflags & FS_XFLAG_DAX)
1009 inode->i_flags |= S_DAX;
1010 else
1011 inode->i_flags &= ~S_DAX;
1012
1013}
1014
1015static int
1016xfs_ioctl_setattr_xflags(
1017 struct xfs_trans *tp,
1018 struct xfs_inode *ip,
1019 struct fsxattr *fa)
1020{
1021 struct xfs_mount *mp = ip->i_mount;
1022
1023 /* Can't change realtime flag if any extents are allocated. */
1024 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1025 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1026 return -EINVAL;
1027
1028 /* If realtime flag is set then must have realtime device */
1029 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1030 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1031 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1032 return -EINVAL;
1033 }
1034
1035 /* Clear reflink if we are actually able to set the rt flag. */
1036 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1037 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1038
1039 /* Don't allow us to set DAX mode for a reflinked file for now. */
1040 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1041 return -EINVAL;
1042
1043 /*
1044 * Can't modify an immutable/append-only file unless
1045 * we have appropriate permission.
1046 */
1047 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1048 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1049 !capable(CAP_LINUX_IMMUTABLE))
1050 return -EPERM;
1051
1052 xfs_set_diflags(ip, fa->fsx_xflags);
1053 xfs_diflags_to_linux(ip);
1054 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1055 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1056 XFS_STATS_INC(mp, xs_ig_attrchg);
1057 return 0;
1058}
1059
1060/*
1061 * If we are changing DAX flags, we have to ensure the file is clean and any
1062 * cached objects in the address space are invalidated and removed. This
1063 * requires us to lock out other IO and page faults similar to a truncate
1064 * operation. The locks need to be held until the transaction has been committed
1065 * so that the cache invalidation is atomic with respect to the DAX flag
1066 * manipulation.
1067 */
1068static int
1069xfs_ioctl_setattr_dax_invalidate(
1070 struct xfs_inode *ip,
1071 struct fsxattr *fa,
1072 int *join_flags)
1073{
1074 struct inode *inode = VFS_I(ip);
1075 int error;
1076
1077 *join_flags = 0;
1078
1079 /*
1080 * It is only valid to set the DAX flag on regular files and
1081 * directories on filesystems where the block size is equal to the page
1082 * size. On directories it serves as an inherit hint.
1083 */
1084 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1085 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1086 return -EINVAL;
1087 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1088 return -EINVAL;
1089 }
1090
1091 /* If the DAX state is not changing, we have nothing to do here. */
1092 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1093 return 0;
1094 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1095 return 0;
1096
1097 /* lock, flush and invalidate mapping in preparation for flag change */
1098 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1099 error = filemap_write_and_wait(inode->i_mapping);
1100 if (error)
1101 goto out_unlock;
1102 error = invalidate_inode_pages2(inode->i_mapping);
1103 if (error)
1104 goto out_unlock;
1105
1106 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1107 return 0;
1108
1109out_unlock:
1110 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1111 return error;
1112
1113}
1114
1115/*
1116 * Set up the transaction structure for the setattr operation, checking that we
1117 * have permission to do so. On success, return a clean transaction and the
1118 * inode locked exclusively ready for further operation specific checks. On
1119 * failure, return an error without modifying or locking the inode.
1120 *
1121 * The inode might already be IO locked on call. If this is the case, it is
1122 * indicated in @join_flags and we take full responsibility for ensuring they
1123 * are unlocked from now on. Hence if we have an error here, we still have to
1124 * unlock them. Otherwise, once they are joined to the transaction, they will
1125 * be unlocked on commit/cancel.
1126 */
1127static struct xfs_trans *
1128xfs_ioctl_setattr_get_trans(
1129 struct xfs_inode *ip,
1130 int join_flags)
1131{
1132 struct xfs_mount *mp = ip->i_mount;
1133 struct xfs_trans *tp;
1134 int error = -EROFS;
1135
1136 if (mp->m_flags & XFS_MOUNT_RDONLY)
1137 goto out_unlock;
1138 error = -EIO;
1139 if (XFS_FORCED_SHUTDOWN(mp))
1140 goto out_unlock;
1141
1142 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1143 if (error)
1144 return ERR_PTR(error);
1145
1146 xfs_ilock(ip, XFS_ILOCK_EXCL);
1147 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1148 join_flags = 0;
1149
1150 /*
1151 * CAP_FOWNER overrides the following restrictions:
1152 *
1153 * The user ID of the calling process must be equal to the file owner
1154 * ID, except in cases where the CAP_FSETID capability is applicable.
1155 */
1156 if (!inode_owner_or_capable(VFS_I(ip))) {
1157 error = -EPERM;
1158 goto out_cancel;
1159 }
1160
1161 if (mp->m_flags & XFS_MOUNT_WSYNC)
1162 xfs_trans_set_sync(tp);
1163
1164 return tp;
1165
1166out_cancel:
1167 xfs_trans_cancel(tp);
1168out_unlock:
1169 if (join_flags)
1170 xfs_iunlock(ip, join_flags);
1171 return ERR_PTR(error);
1172}
1173
1174/*
1175 * extent size hint validation is somewhat cumbersome. Rules are:
1176 *
1177 * 1. extent size hint is only valid for directories and regular files
1178 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1179 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1180 * 4. can only be changed on regular files if no extents are allocated
1181 * 5. can be changed on directories at any time
1182 * 6. extsize hint of 0 turns off hints, clears inode flags.
1183 * 7. Extent size must be a multiple of the appropriate block size.
1184 * 8. for non-realtime files, the extent size hint must be limited
1185 * to half the AG size to avoid alignment extending the extent beyond the
1186 * limits of the AG.
1187 */
1188static int
1189xfs_ioctl_setattr_check_extsize(
1190 struct xfs_inode *ip,
1191 struct fsxattr *fa)
1192{
1193 struct xfs_mount *mp = ip->i_mount;
1194
1195 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1196 return -EINVAL;
1197
1198 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1199 !S_ISDIR(VFS_I(ip)->i_mode))
1200 return -EINVAL;
1201
1202 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1203 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1204 return -EINVAL;
1205
1206 if (fa->fsx_extsize != 0) {
1207 xfs_extlen_t size;
1208 xfs_fsblock_t extsize_fsb;
1209
1210 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1211 if (extsize_fsb > MAXEXTLEN)
1212 return -EINVAL;
1213
1214 if (XFS_IS_REALTIME_INODE(ip) ||
1215 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1216 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1217 } else {
1218 size = mp->m_sb.sb_blocksize;
1219 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1220 return -EINVAL;
1221 }
1222
1223 if (fa->fsx_extsize % size)
1224 return -EINVAL;
1225 } else
1226 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1227
1228 return 0;
1229}
1230
1231/*
1232 * CoW extent size hint validation rules are:
1233 *
1234 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1235 * The inode does not have to have any shared blocks, but it must be a v3.
1236 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1237 * for a directory, the hint is propagated to new files.
1238 * 3. Can be changed on files & directories at any time.
1239 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1240 * 5. Extent size must be a multiple of the appropriate block size.
1241 * 6. The extent size hint must be limited to half the AG size to avoid
1242 * alignment extending the extent beyond the limits of the AG.
1243 */
1244static int
1245xfs_ioctl_setattr_check_cowextsize(
1246 struct xfs_inode *ip,
1247 struct fsxattr *fa)
1248{
1249 struct xfs_mount *mp = ip->i_mount;
1250
1251 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1252 return 0;
1253
1254 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1255 ip->i_d.di_version != 3)
1256 return -EINVAL;
1257
1258 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1259 return -EINVAL;
1260
1261 if (fa->fsx_cowextsize != 0) {
1262 xfs_extlen_t size;
1263 xfs_fsblock_t cowextsize_fsb;
1264
1265 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1266 if (cowextsize_fsb > MAXEXTLEN)
1267 return -EINVAL;
1268
1269 size = mp->m_sb.sb_blocksize;
1270 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1271 return -EINVAL;
1272
1273 if (fa->fsx_cowextsize % size)
1274 return -EINVAL;
1275 } else
1276 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1277
1278 return 0;
1279}
1280
1281static int
1282xfs_ioctl_setattr_check_projid(
1283 struct xfs_inode *ip,
1284 struct fsxattr *fa)
1285{
1286 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1287 if (fa->fsx_projid > (__uint16_t)-1 &&
1288 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1289 return -EINVAL;
1290
1291 /*
1292 * Project Quota ID state is only allowed to change from within the init
1293 * namespace. Enforce that restriction only if we are trying to change
1294 * the quota ID state. Everything else is allowed in user namespaces.
1295 */
1296 if (current_user_ns() == &init_user_ns)
1297 return 0;
1298
1299 if (xfs_get_projid(ip) != fa->fsx_projid)
1300 return -EINVAL;
1301 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1302 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1303 return -EINVAL;
1304
1305 return 0;
1306}
1307
1308STATIC int
1309xfs_ioctl_setattr(
1310 xfs_inode_t *ip,
1311 struct fsxattr *fa)
1312{
1313 struct xfs_mount *mp = ip->i_mount;
1314 struct xfs_trans *tp;
1315 struct xfs_dquot *udqp = NULL;
1316 struct xfs_dquot *pdqp = NULL;
1317 struct xfs_dquot *olddquot = NULL;
1318 int code;
1319 int join_flags = 0;
1320
1321 trace_xfs_ioctl_setattr(ip);
1322
1323 code = xfs_ioctl_setattr_check_projid(ip, fa);
1324 if (code)
1325 return code;
1326
1327 /*
1328 * If disk quotas is on, we make sure that the dquots do exist on disk,
1329 * before we start any other transactions. Trying to do this later
1330 * is messy. We don't care to take a readlock to look at the ids
1331 * in inode here, because we can't hold it across the trans_reserve.
1332 * If the IDs do change before we take the ilock, we're covered
1333 * because the i_*dquot fields will get updated anyway.
1334 */
1335 if (XFS_IS_QUOTA_ON(mp)) {
1336 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1337 ip->i_d.di_gid, fa->fsx_projid,
1338 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1339 if (code)
1340 return code;
1341 }
1342
1343 /*
1344 * Changing DAX config may require inode locking for mapping
1345 * invalidation. These need to be held all the way to transaction commit
1346 * or cancel time, so need to be passed through to
1347 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1348 * appropriately.
1349 */
1350 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1351 if (code)
1352 goto error_free_dquots;
1353
1354 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1355 if (IS_ERR(tp)) {
1356 code = PTR_ERR(tp);
1357 goto error_free_dquots;
1358 }
1359
1360
1361 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1362 xfs_get_projid(ip) != fa->fsx_projid) {
1363 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1364 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1365 if (code) /* out of quota */
1366 goto error_trans_cancel;
1367 }
1368
1369 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1370 if (code)
1371 goto error_trans_cancel;
1372
1373 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1374 if (code)
1375 goto error_trans_cancel;
1376
1377 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1378 if (code)
1379 goto error_trans_cancel;
1380
1381 /*
1382 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1383 * overrides the following restrictions:
1384 *
1385 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1386 * successful return from chown()
1387 */
1388
1389 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1390 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1391 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1392
1393 /* Change the ownerships and register project quota modifications */
1394 if (xfs_get_projid(ip) != fa->fsx_projid) {
1395 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1396 olddquot = xfs_qm_vop_chown(tp, ip,
1397 &ip->i_pdquot, pdqp);
1398 }
1399 ASSERT(ip->i_d.di_version > 1);
1400 xfs_set_projid(ip, fa->fsx_projid);
1401 }
1402
1403 /*
1404 * Only set the extent size hint if we've already determined that the
1405 * extent size hint should be set on the inode. If no extent size flags
1406 * are set on the inode then unconditionally clear the extent size hint.
1407 */
1408 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1409 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1410 else
1411 ip->i_d.di_extsize = 0;
1412 if (ip->i_d.di_version == 3 &&
1413 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1414 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1415 mp->m_sb.sb_blocklog;
1416 else
1417 ip->i_d.di_cowextsize = 0;
1418
1419 code = xfs_trans_commit(tp);
1420
1421 /*
1422 * Release any dquot(s) the inode had kept before chown.
1423 */
1424 xfs_qm_dqrele(olddquot);
1425 xfs_qm_dqrele(udqp);
1426 xfs_qm_dqrele(pdqp);
1427
1428 return code;
1429
1430error_trans_cancel:
1431 xfs_trans_cancel(tp);
1432error_free_dquots:
1433 xfs_qm_dqrele(udqp);
1434 xfs_qm_dqrele(pdqp);
1435 return code;
1436}
1437
1438STATIC int
1439xfs_ioc_fssetxattr(
1440 xfs_inode_t *ip,
1441 struct file *filp,
1442 void __user *arg)
1443{
1444 struct fsxattr fa;
1445 int error;
1446
1447 if (copy_from_user(&fa, arg, sizeof(fa)))
1448 return -EFAULT;
1449
1450 error = mnt_want_write_file(filp);
1451 if (error)
1452 return error;
1453 error = xfs_ioctl_setattr(ip, &fa);
1454 mnt_drop_write_file(filp);
1455 return error;
1456}
1457
1458STATIC int
1459xfs_ioc_getxflags(
1460 xfs_inode_t *ip,
1461 void __user *arg)
1462{
1463 unsigned int flags;
1464
1465 flags = xfs_di2lxflags(ip->i_d.di_flags);
1466 if (copy_to_user(arg, &flags, sizeof(flags)))
1467 return -EFAULT;
1468 return 0;
1469}
1470
1471STATIC int
1472xfs_ioc_setxflags(
1473 struct xfs_inode *ip,
1474 struct file *filp,
1475 void __user *arg)
1476{
1477 struct xfs_trans *tp;
1478 struct fsxattr fa;
1479 unsigned int flags;
1480 int join_flags = 0;
1481 int error;
1482
1483 if (copy_from_user(&flags, arg, sizeof(flags)))
1484 return -EFAULT;
1485
1486 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1487 FS_NOATIME_FL | FS_NODUMP_FL | \
1488 FS_SYNC_FL))
1489 return -EOPNOTSUPP;
1490
1491 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1492
1493 error = mnt_want_write_file(filp);
1494 if (error)
1495 return error;
1496
1497 /*
1498 * Changing DAX config may require inode locking for mapping
1499 * invalidation. These need to be held all the way to transaction commit
1500 * or cancel time, so need to be passed through to
1501 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1502 * appropriately.
1503 */
1504 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1505 if (error)
1506 goto out_drop_write;
1507
1508 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1509 if (IS_ERR(tp)) {
1510 error = PTR_ERR(tp);
1511 goto out_drop_write;
1512 }
1513
1514 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1515 if (error) {
1516 xfs_trans_cancel(tp);
1517 goto out_drop_write;
1518 }
1519
1520 error = xfs_trans_commit(tp);
1521out_drop_write:
1522 mnt_drop_write_file(filp);
1523 return error;
1524}
1525
1526STATIC int
1527xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1528{
1529 struct getbmap __user *base = (struct getbmap __user *)*ap;
1530
1531 /* copy only getbmap portion (not getbmapx) */
1532 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1533 return -EFAULT;
1534
1535 *ap += sizeof(struct getbmap);
1536 return 0;
1537}
1538
1539STATIC int
1540xfs_ioc_getbmap(
1541 struct file *file,
1542 unsigned int cmd,
1543 void __user *arg)
1544{
1545 struct getbmapx bmx;
1546 int error;
1547
1548 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1549 return -EFAULT;
1550
1551 if (bmx.bmv_count < 2)
1552 return -EINVAL;
1553
1554 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1555 if (file->f_mode & FMODE_NOCMTIME)
1556 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1557
1558 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
1559 (__force struct getbmap *)arg+1);
1560 if (error)
1561 return error;
1562
1563 /* copy back header - only size of getbmap */
1564 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1565 return -EFAULT;
1566 return 0;
1567}
1568
1569STATIC int
1570xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1571{
1572 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1573
1574 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1575 return -EFAULT;
1576
1577 *ap += sizeof(struct getbmapx);
1578 return 0;
1579}
1580
1581STATIC int
1582xfs_ioc_getbmapx(
1583 struct xfs_inode *ip,
1584 void __user *arg)
1585{
1586 struct getbmapx bmx;
1587 int error;
1588
1589 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1590 return -EFAULT;
1591
1592 if (bmx.bmv_count < 2)
1593 return -EINVAL;
1594
1595 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1596 return -EINVAL;
1597
1598 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1599 (__force struct getbmapx *)arg+1);
1600 if (error)
1601 return error;
1602
1603 /* copy back header */
1604 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1605 return -EFAULT;
1606
1607 return 0;
1608}
1609
1610int
1611xfs_ioc_swapext(
1612 xfs_swapext_t *sxp)
1613{
1614 xfs_inode_t *ip, *tip;
1615 struct fd f, tmp;
1616 int error = 0;
1617
1618 /* Pull information for the target fd */
1619 f = fdget((int)sxp->sx_fdtarget);
1620 if (!f.file) {
1621 error = -EINVAL;
1622 goto out;
1623 }
1624
1625 if (!(f.file->f_mode & FMODE_WRITE) ||
1626 !(f.file->f_mode & FMODE_READ) ||
1627 (f.file->f_flags & O_APPEND)) {
1628 error = -EBADF;
1629 goto out_put_file;
1630 }
1631
1632 tmp = fdget((int)sxp->sx_fdtmp);
1633 if (!tmp.file) {
1634 error = -EINVAL;
1635 goto out_put_file;
1636 }
1637
1638 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1639 !(tmp.file->f_mode & FMODE_READ) ||
1640 (tmp.file->f_flags & O_APPEND)) {
1641 error = -EBADF;
1642 goto out_put_tmp_file;
1643 }
1644
1645 if (IS_SWAPFILE(file_inode(f.file)) ||
1646 IS_SWAPFILE(file_inode(tmp.file))) {
1647 error = -EINVAL;
1648 goto out_put_tmp_file;
1649 }
1650
1651 /*
1652 * We need to ensure that the fds passed in point to XFS inodes
1653 * before we cast and access them as XFS structures as we have no
1654 * control over what the user passes us here.
1655 */
1656 if (f.file->f_op != &xfs_file_operations ||
1657 tmp.file->f_op != &xfs_file_operations) {
1658 error = -EINVAL;
1659 goto out_put_tmp_file;
1660 }
1661
1662 ip = XFS_I(file_inode(f.file));
1663 tip = XFS_I(file_inode(tmp.file));
1664
1665 if (ip->i_mount != tip->i_mount) {
1666 error = -EINVAL;
1667 goto out_put_tmp_file;
1668 }
1669
1670 if (ip->i_ino == tip->i_ino) {
1671 error = -EINVAL;
1672 goto out_put_tmp_file;
1673 }
1674
1675 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1676 error = -EIO;
1677 goto out_put_tmp_file;
1678 }
1679
1680 error = xfs_swap_extents(ip, tip, sxp);
1681
1682 out_put_tmp_file:
1683 fdput(tmp);
1684 out_put_file:
1685 fdput(f);
1686 out:
1687 return error;
1688}
1689
1690/*
1691 * Note: some of the ioctl's return positive numbers as a
1692 * byte count indicating success, such as readlink_by_handle.
1693 * So we don't "sign flip" like most other routines. This means
1694 * true errors need to be returned as a negative value.
1695 */
1696long
1697xfs_file_ioctl(
1698 struct file *filp,
1699 unsigned int cmd,
1700 unsigned long p)
1701{
1702 struct inode *inode = file_inode(filp);
1703 struct xfs_inode *ip = XFS_I(inode);
1704 struct xfs_mount *mp = ip->i_mount;
1705 void __user *arg = (void __user *)p;
1706 int error;
1707
1708 trace_xfs_file_ioctl(ip);
1709
1710 switch (cmd) {
1711 case FITRIM:
1712 return xfs_ioc_trim(mp, arg);
1713 case XFS_IOC_ALLOCSP:
1714 case XFS_IOC_FREESP:
1715 case XFS_IOC_RESVSP:
1716 case XFS_IOC_UNRESVSP:
1717 case XFS_IOC_ALLOCSP64:
1718 case XFS_IOC_FREESP64:
1719 case XFS_IOC_RESVSP64:
1720 case XFS_IOC_UNRESVSP64:
1721 case XFS_IOC_ZERO_RANGE: {
1722 xfs_flock64_t bf;
1723
1724 if (copy_from_user(&bf, arg, sizeof(bf)))
1725 return -EFAULT;
1726 return xfs_ioc_space(filp, cmd, &bf);
1727 }
1728 case XFS_IOC_DIOINFO: {
1729 struct dioattr da;
1730 xfs_buftarg_t *target =
1731 XFS_IS_REALTIME_INODE(ip) ?
1732 mp->m_rtdev_targp : mp->m_ddev_targp;
1733
1734 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1735 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1736
1737 if (copy_to_user(arg, &da, sizeof(da)))
1738 return -EFAULT;
1739 return 0;
1740 }
1741
1742 case XFS_IOC_FSBULKSTAT_SINGLE:
1743 case XFS_IOC_FSBULKSTAT:
1744 case XFS_IOC_FSINUMBERS:
1745 return xfs_ioc_bulkstat(mp, cmd, arg);
1746
1747 case XFS_IOC_FSGEOMETRY_V1:
1748 return xfs_ioc_fsgeometry_v1(mp, arg);
1749
1750 case XFS_IOC_FSGEOMETRY:
1751 return xfs_ioc_fsgeometry(mp, arg);
1752
1753 case XFS_IOC_GETVERSION:
1754 return put_user(inode->i_generation, (int __user *)arg);
1755
1756 case XFS_IOC_FSGETXATTR:
1757 return xfs_ioc_fsgetxattr(ip, 0, arg);
1758 case XFS_IOC_FSGETXATTRA:
1759 return xfs_ioc_fsgetxattr(ip, 1, arg);
1760 case XFS_IOC_FSSETXATTR:
1761 return xfs_ioc_fssetxattr(ip, filp, arg);
1762 case XFS_IOC_GETXFLAGS:
1763 return xfs_ioc_getxflags(ip, arg);
1764 case XFS_IOC_SETXFLAGS:
1765 return xfs_ioc_setxflags(ip, filp, arg);
1766
1767 case XFS_IOC_FSSETDM: {
1768 struct fsdmidata dmi;
1769
1770 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1771 return -EFAULT;
1772
1773 error = mnt_want_write_file(filp);
1774 if (error)
1775 return error;
1776
1777 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1778 dmi.fsd_dmstate);
1779 mnt_drop_write_file(filp);
1780 return error;
1781 }
1782
1783 case XFS_IOC_GETBMAP:
1784 case XFS_IOC_GETBMAPA:
1785 return xfs_ioc_getbmap(filp, cmd, arg);
1786
1787 case XFS_IOC_GETBMAPX:
1788 return xfs_ioc_getbmapx(ip, arg);
1789
1790 case XFS_IOC_FD_TO_HANDLE:
1791 case XFS_IOC_PATH_TO_HANDLE:
1792 case XFS_IOC_PATH_TO_FSHANDLE: {
1793 xfs_fsop_handlereq_t hreq;
1794
1795 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1796 return -EFAULT;
1797 return xfs_find_handle(cmd, &hreq);
1798 }
1799 case XFS_IOC_OPEN_BY_HANDLE: {
1800 xfs_fsop_handlereq_t hreq;
1801
1802 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1803 return -EFAULT;
1804 return xfs_open_by_handle(filp, &hreq);
1805 }
1806 case XFS_IOC_FSSETDM_BY_HANDLE:
1807 return xfs_fssetdm_by_handle(filp, arg);
1808
1809 case XFS_IOC_READLINK_BY_HANDLE: {
1810 xfs_fsop_handlereq_t hreq;
1811
1812 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1813 return -EFAULT;
1814 return xfs_readlink_by_handle(filp, &hreq);
1815 }
1816 case XFS_IOC_ATTRLIST_BY_HANDLE:
1817 return xfs_attrlist_by_handle(filp, arg);
1818
1819 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1820 return xfs_attrmulti_by_handle(filp, arg);
1821
1822 case XFS_IOC_SWAPEXT: {
1823 struct xfs_swapext sxp;
1824
1825 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1826 return -EFAULT;
1827 error = mnt_want_write_file(filp);
1828 if (error)
1829 return error;
1830 error = xfs_ioc_swapext(&sxp);
1831 mnt_drop_write_file(filp);
1832 return error;
1833 }
1834
1835 case XFS_IOC_FSCOUNTS: {
1836 xfs_fsop_counts_t out;
1837
1838 error = xfs_fs_counts(mp, &out);
1839 if (error)
1840 return error;
1841
1842 if (copy_to_user(arg, &out, sizeof(out)))
1843 return -EFAULT;
1844 return 0;
1845 }
1846
1847 case XFS_IOC_SET_RESBLKS: {
1848 xfs_fsop_resblks_t inout;
1849 __uint64_t in;
1850
1851 if (!capable(CAP_SYS_ADMIN))
1852 return -EPERM;
1853
1854 if (mp->m_flags & XFS_MOUNT_RDONLY)
1855 return -EROFS;
1856
1857 if (copy_from_user(&inout, arg, sizeof(inout)))
1858 return -EFAULT;
1859
1860 error = mnt_want_write_file(filp);
1861 if (error)
1862 return error;
1863
1864 /* input parameter is passed in resblks field of structure */
1865 in = inout.resblks;
1866 error = xfs_reserve_blocks(mp, &in, &inout);
1867 mnt_drop_write_file(filp);
1868 if (error)
1869 return error;
1870
1871 if (copy_to_user(arg, &inout, sizeof(inout)))
1872 return -EFAULT;
1873 return 0;
1874 }
1875
1876 case XFS_IOC_GET_RESBLKS: {
1877 xfs_fsop_resblks_t out;
1878
1879 if (!capable(CAP_SYS_ADMIN))
1880 return -EPERM;
1881
1882 error = xfs_reserve_blocks(mp, NULL, &out);
1883 if (error)
1884 return error;
1885
1886 if (copy_to_user(arg, &out, sizeof(out)))
1887 return -EFAULT;
1888
1889 return 0;
1890 }
1891
1892 case XFS_IOC_FSGROWFSDATA: {
1893 xfs_growfs_data_t in;
1894
1895 if (copy_from_user(&in, arg, sizeof(in)))
1896 return -EFAULT;
1897
1898 error = mnt_want_write_file(filp);
1899 if (error)
1900 return error;
1901 error = xfs_growfs_data(mp, &in);
1902 mnt_drop_write_file(filp);
1903 return error;
1904 }
1905
1906 case XFS_IOC_FSGROWFSLOG: {
1907 xfs_growfs_log_t in;
1908
1909 if (copy_from_user(&in, arg, sizeof(in)))
1910 return -EFAULT;
1911
1912 error = mnt_want_write_file(filp);
1913 if (error)
1914 return error;
1915 error = xfs_growfs_log(mp, &in);
1916 mnt_drop_write_file(filp);
1917 return error;
1918 }
1919
1920 case XFS_IOC_FSGROWFSRT: {
1921 xfs_growfs_rt_t in;
1922
1923 if (copy_from_user(&in, arg, sizeof(in)))
1924 return -EFAULT;
1925
1926 error = mnt_want_write_file(filp);
1927 if (error)
1928 return error;
1929 error = xfs_growfs_rt(mp, &in);
1930 mnt_drop_write_file(filp);
1931 return error;
1932 }
1933
1934 case XFS_IOC_GOINGDOWN: {
1935 __uint32_t in;
1936
1937 if (!capable(CAP_SYS_ADMIN))
1938 return -EPERM;
1939
1940 if (get_user(in, (__uint32_t __user *)arg))
1941 return -EFAULT;
1942
1943 return xfs_fs_goingdown(mp, in);
1944 }
1945
1946 case XFS_IOC_ERROR_INJECTION: {
1947 xfs_error_injection_t in;
1948
1949 if (!capable(CAP_SYS_ADMIN))
1950 return -EPERM;
1951
1952 if (copy_from_user(&in, arg, sizeof(in)))
1953 return -EFAULT;
1954
1955 return xfs_errortag_add(in.errtag, mp);
1956 }
1957
1958 case XFS_IOC_ERROR_CLEARALL:
1959 if (!capable(CAP_SYS_ADMIN))
1960 return -EPERM;
1961
1962 return xfs_errortag_clearall(mp, 1);
1963
1964 case XFS_IOC_FREE_EOFBLOCKS: {
1965 struct xfs_fs_eofblocks eofb;
1966 struct xfs_eofblocks keofb;
1967
1968 if (!capable(CAP_SYS_ADMIN))
1969 return -EPERM;
1970
1971 if (mp->m_flags & XFS_MOUNT_RDONLY)
1972 return -EROFS;
1973
1974 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1975 return -EFAULT;
1976
1977 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1978 if (error)
1979 return error;
1980
1981 return xfs_icache_free_eofblocks(mp, &keofb);
1982 }
1983
1984 default:
1985 return -ENOTTY;
1986 }
1987}