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Merge tag 'for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
[mirror_ubuntu-artful-kernel.git] / fs / xfs / xfs_ioctl.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_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
44 #include <linux/capability.h>
45 #include <linux/dcache.h>
46 #include <linux/mount.h>
47 #include <linux/namei.h>
48 #include <linux/pagemap.h>
49 #include <linux/slab.h>
50 #include <linux/exportfs.h>
51
52 /*
53 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
54 * a file or fs handle.
55 *
56 * XFS_IOC_PATH_TO_FSHANDLE
57 * returns fs handle for a mount point or path within that mount point
58 * XFS_IOC_FD_TO_HANDLE
59 * returns full handle for a FD opened in user space
60 * XFS_IOC_PATH_TO_HANDLE
61 * returns full handle for a path
62 */
63 int
64 xfs_find_handle(
65 unsigned int cmd,
66 xfs_fsop_handlereq_t *hreq)
67 {
68 int hsize;
69 xfs_handle_t handle;
70 struct inode *inode;
71 struct fd f = {NULL};
72 struct path path;
73 int error;
74 struct xfs_inode *ip;
75
76 if (cmd == XFS_IOC_FD_TO_HANDLE) {
77 f = fdget(hreq->fd);
78 if (!f.file)
79 return -EBADF;
80 inode = file_inode(f.file);
81 } else {
82 error = user_lpath((const char __user *)hreq->path, &path);
83 if (error)
84 return error;
85 inode = d_inode(path.dentry);
86 }
87 ip = XFS_I(inode);
88
89 /*
90 * We can only generate handles for inodes residing on a XFS filesystem,
91 * and only for regular files, directories or symbolic links.
92 */
93 error = -EINVAL;
94 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
95 goto out_put;
96
97 error = -EBADF;
98 if (!S_ISREG(inode->i_mode) &&
99 !S_ISDIR(inode->i_mode) &&
100 !S_ISLNK(inode->i_mode))
101 goto out_put;
102
103
104 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
105
106 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
107 /*
108 * This handle only contains an fsid, zero the rest.
109 */
110 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
111 hsize = sizeof(xfs_fsid_t);
112 } else {
113 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
114 sizeof(handle.ha_fid.fid_len);
115 handle.ha_fid.fid_pad = 0;
116 handle.ha_fid.fid_gen = ip->i_d.di_gen;
117 handle.ha_fid.fid_ino = ip->i_ino;
118
119 hsize = XFS_HSIZE(handle);
120 }
121
122 error = -EFAULT;
123 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
124 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
125 goto out_put;
126
127 error = 0;
128
129 out_put:
130 if (cmd == XFS_IOC_FD_TO_HANDLE)
131 fdput(f);
132 else
133 path_put(&path);
134 return error;
135 }
136
137 /*
138 * No need to do permission checks on the various pathname components
139 * as the handle operations are privileged.
140 */
141 STATIC int
142 xfs_handle_acceptable(
143 void *context,
144 struct dentry *dentry)
145 {
146 return 1;
147 }
148
149 /*
150 * Convert userspace handle data into a dentry.
151 */
152 struct dentry *
153 xfs_handle_to_dentry(
154 struct file *parfilp,
155 void __user *uhandle,
156 u32 hlen)
157 {
158 xfs_handle_t handle;
159 struct xfs_fid64 fid;
160
161 /*
162 * Only allow handle opens under a directory.
163 */
164 if (!S_ISDIR(file_inode(parfilp)->i_mode))
165 return ERR_PTR(-ENOTDIR);
166
167 if (hlen != sizeof(xfs_handle_t))
168 return ERR_PTR(-EINVAL);
169 if (copy_from_user(&handle, uhandle, hlen))
170 return ERR_PTR(-EFAULT);
171 if (handle.ha_fid.fid_len !=
172 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
173 return ERR_PTR(-EINVAL);
174
175 memset(&fid, 0, sizeof(struct fid));
176 fid.ino = handle.ha_fid.fid_ino;
177 fid.gen = handle.ha_fid.fid_gen;
178
179 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
180 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
181 xfs_handle_acceptable, NULL);
182 }
183
184 STATIC struct dentry *
185 xfs_handlereq_to_dentry(
186 struct file *parfilp,
187 xfs_fsop_handlereq_t *hreq)
188 {
189 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
190 }
191
192 int
193 xfs_open_by_handle(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196 {
197 const struct cred *cred = current_cred();
198 int error;
199 int fd;
200 int permflag;
201 struct file *filp;
202 struct inode *inode;
203 struct dentry *dentry;
204 fmode_t fmode;
205 struct path path;
206
207 if (!capable(CAP_SYS_ADMIN))
208 return -EPERM;
209
210 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
211 if (IS_ERR(dentry))
212 return PTR_ERR(dentry);
213 inode = d_inode(dentry);
214
215 /* Restrict xfs_open_by_handle to directories & regular files. */
216 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
217 error = -EPERM;
218 goto out_dput;
219 }
220
221 #if BITS_PER_LONG != 32
222 hreq->oflags |= O_LARGEFILE;
223 #endif
224
225 permflag = hreq->oflags;
226 fmode = OPEN_FMODE(permflag);
227 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
228 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
229 error = -EPERM;
230 goto out_dput;
231 }
232
233 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
234 error = -EACCES;
235 goto out_dput;
236 }
237
238 /* Can't write directories. */
239 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
240 error = -EISDIR;
241 goto out_dput;
242 }
243
244 fd = get_unused_fd_flags(0);
245 if (fd < 0) {
246 error = fd;
247 goto out_dput;
248 }
249
250 path.mnt = parfilp->f_path.mnt;
251 path.dentry = dentry;
252 filp = dentry_open(&path, hreq->oflags, cred);
253 dput(dentry);
254 if (IS_ERR(filp)) {
255 put_unused_fd(fd);
256 return PTR_ERR(filp);
257 }
258
259 if (S_ISREG(inode->i_mode)) {
260 filp->f_flags |= O_NOATIME;
261 filp->f_mode |= FMODE_NOCMTIME;
262 }
263
264 fd_install(fd, filp);
265 return fd;
266
267 out_dput:
268 dput(dentry);
269 return error;
270 }
271
272 int
273 xfs_readlink_by_handle(
274 struct file *parfilp,
275 xfs_fsop_handlereq_t *hreq)
276 {
277 struct dentry *dentry;
278 __u32 olen;
279 void *link;
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 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
301 if (!link) {
302 error = -ENOMEM;
303 goto out_dput;
304 }
305
306 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
307 if (error)
308 goto out_kfree;
309 error = readlink_copy(hreq->ohandle, olen, link);
310 if (error)
311 goto out_kfree;
312
313 out_kfree:
314 kfree(link);
315 out_dput:
316 dput(dentry);
317 return error;
318 }
319
320 int
321 xfs_set_dmattrs(
322 xfs_inode_t *ip,
323 u_int evmask,
324 u_int16_t state)
325 {
326 xfs_mount_t *mp = ip->i_mount;
327 xfs_trans_t *tp;
328 int error;
329
330 if (!capable(CAP_SYS_ADMIN))
331 return -EPERM;
332
333 if (XFS_FORCED_SHUTDOWN(mp))
334 return -EIO;
335
336 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
337 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
338 if (error) {
339 xfs_trans_cancel(tp, 0);
340 return error;
341 }
342 xfs_ilock(ip, XFS_ILOCK_EXCL);
343 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
344
345 ip->i_d.di_dmevmask = evmask;
346 ip->i_d.di_dmstate = state;
347
348 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
349 error = xfs_trans_commit(tp, 0);
350
351 return error;
352 }
353
354 STATIC int
355 xfs_fssetdm_by_handle(
356 struct file *parfilp,
357 void __user *arg)
358 {
359 int error;
360 struct fsdmidata fsd;
361 xfs_fsop_setdm_handlereq_t dmhreq;
362 struct dentry *dentry;
363
364 if (!capable(CAP_MKNOD))
365 return -EPERM;
366 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
367 return -EFAULT;
368
369 error = mnt_want_write_file(parfilp);
370 if (error)
371 return error;
372
373 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
374 if (IS_ERR(dentry)) {
375 mnt_drop_write_file(parfilp);
376 return PTR_ERR(dentry);
377 }
378
379 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
380 error = -EPERM;
381 goto out;
382 }
383
384 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
385 error = -EFAULT;
386 goto out;
387 }
388
389 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
390 fsd.fsd_dmstate);
391
392 out:
393 mnt_drop_write_file(parfilp);
394 dput(dentry);
395 return error;
396 }
397
398 STATIC int
399 xfs_attrlist_by_handle(
400 struct file *parfilp,
401 void __user *arg)
402 {
403 int error = -ENOMEM;
404 attrlist_cursor_kern_t *cursor;
405 xfs_fsop_attrlist_handlereq_t al_hreq;
406 struct dentry *dentry;
407 char *kbuf;
408
409 if (!capable(CAP_SYS_ADMIN))
410 return -EPERM;
411 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
412 return -EFAULT;
413 if (al_hreq.buflen < sizeof(struct attrlist) ||
414 al_hreq.buflen > XATTR_LIST_MAX)
415 return -EINVAL;
416
417 /*
418 * Reject flags, only allow namespaces.
419 */
420 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
421 return -EINVAL;
422
423 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
424 if (IS_ERR(dentry))
425 return PTR_ERR(dentry);
426
427 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
428 if (!kbuf)
429 goto out_dput;
430
431 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
432 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
433 al_hreq.flags, cursor);
434 if (error)
435 goto out_kfree;
436
437 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
438 error = -EFAULT;
439
440 out_kfree:
441 kmem_free(kbuf);
442 out_dput:
443 dput(dentry);
444 return error;
445 }
446
447 int
448 xfs_attrmulti_attr_get(
449 struct inode *inode,
450 unsigned char *name,
451 unsigned char __user *ubuf,
452 __uint32_t *len,
453 __uint32_t flags)
454 {
455 unsigned char *kbuf;
456 int error = -EFAULT;
457
458 if (*len > XATTR_SIZE_MAX)
459 return -EINVAL;
460 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
461 if (!kbuf)
462 return -ENOMEM;
463
464 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
465 if (error)
466 goto out_kfree;
467
468 if (copy_to_user(ubuf, kbuf, *len))
469 error = -EFAULT;
470
471 out_kfree:
472 kmem_free(kbuf);
473 return error;
474 }
475
476 int
477 xfs_attrmulti_attr_set(
478 struct inode *inode,
479 unsigned char *name,
480 const unsigned char __user *ubuf,
481 __uint32_t len,
482 __uint32_t flags)
483 {
484 unsigned char *kbuf;
485
486 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
487 return -EPERM;
488 if (len > XATTR_SIZE_MAX)
489 return -EINVAL;
490
491 kbuf = memdup_user(ubuf, len);
492 if (IS_ERR(kbuf))
493 return PTR_ERR(kbuf);
494
495 return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
496 }
497
498 int
499 xfs_attrmulti_attr_remove(
500 struct inode *inode,
501 unsigned char *name,
502 __uint32_t flags)
503 {
504 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
505 return -EPERM;
506 return xfs_attr_remove(XFS_I(inode), name, flags);
507 }
508
509 STATIC int
510 xfs_attrmulti_by_handle(
511 struct file *parfilp,
512 void __user *arg)
513 {
514 int error;
515 xfs_attr_multiop_t *ops;
516 xfs_fsop_attrmulti_handlereq_t am_hreq;
517 struct dentry *dentry;
518 unsigned int i, size;
519 unsigned char *attr_name;
520
521 if (!capable(CAP_SYS_ADMIN))
522 return -EPERM;
523 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
524 return -EFAULT;
525
526 /* overflow check */
527 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
528 return -E2BIG;
529
530 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
531 if (IS_ERR(dentry))
532 return PTR_ERR(dentry);
533
534 error = -E2BIG;
535 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
536 if (!size || size > 16 * PAGE_SIZE)
537 goto out_dput;
538
539 ops = memdup_user(am_hreq.ops, size);
540 if (IS_ERR(ops)) {
541 error = PTR_ERR(ops);
542 goto out_dput;
543 }
544
545 error = -ENOMEM;
546 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
547 if (!attr_name)
548 goto out_kfree_ops;
549
550 error = 0;
551 for (i = 0; i < am_hreq.opcount; i++) {
552 ops[i].am_error = strncpy_from_user((char *)attr_name,
553 ops[i].am_attrname, MAXNAMELEN);
554 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
555 error = -ERANGE;
556 if (ops[i].am_error < 0)
557 break;
558
559 switch (ops[i].am_opcode) {
560 case ATTR_OP_GET:
561 ops[i].am_error = xfs_attrmulti_attr_get(
562 d_inode(dentry), attr_name,
563 ops[i].am_attrvalue, &ops[i].am_length,
564 ops[i].am_flags);
565 break;
566 case ATTR_OP_SET:
567 ops[i].am_error = mnt_want_write_file(parfilp);
568 if (ops[i].am_error)
569 break;
570 ops[i].am_error = xfs_attrmulti_attr_set(
571 d_inode(dentry), attr_name,
572 ops[i].am_attrvalue, ops[i].am_length,
573 ops[i].am_flags);
574 mnt_drop_write_file(parfilp);
575 break;
576 case ATTR_OP_REMOVE:
577 ops[i].am_error = mnt_want_write_file(parfilp);
578 if (ops[i].am_error)
579 break;
580 ops[i].am_error = xfs_attrmulti_attr_remove(
581 d_inode(dentry), attr_name,
582 ops[i].am_flags);
583 mnt_drop_write_file(parfilp);
584 break;
585 default:
586 ops[i].am_error = -EINVAL;
587 }
588 }
589
590 if (copy_to_user(am_hreq.ops, ops, size))
591 error = -EFAULT;
592
593 kfree(attr_name);
594 out_kfree_ops:
595 kfree(ops);
596 out_dput:
597 dput(dentry);
598 return error;
599 }
600
601 int
602 xfs_ioc_space(
603 struct xfs_inode *ip,
604 struct inode *inode,
605 struct file *filp,
606 int ioflags,
607 unsigned int cmd,
608 xfs_flock64_t *bf)
609 {
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 (ioflags & XFS_IO_INVIS)
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, false);
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_setattr_size(ip, &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
735 out_unlock:
736 xfs_iunlock(ip, iolock);
737 mnt_drop_write_file(filp);
738 return error;
739 }
740
741 STATIC int
742 xfs_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
800 STATIC int
801 xfs_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
822 STATIC int
823 xfs_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
843 STATIC unsigned int
844 xfs_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 |= XFS_XFLAG_IMMUTABLE;
852 else
853 xflags &= ~XFS_XFLAG_IMMUTABLE;
854 if (flags & FS_APPEND_FL)
855 xflags |= XFS_XFLAG_APPEND;
856 else
857 xflags &= ~XFS_XFLAG_APPEND;
858 if (flags & FS_SYNC_FL)
859 xflags |= XFS_XFLAG_SYNC;
860 else
861 xflags &= ~XFS_XFLAG_SYNC;
862 if (flags & FS_NOATIME_FL)
863 xflags |= XFS_XFLAG_NOATIME;
864 else
865 xflags &= ~XFS_XFLAG_NOATIME;
866 if (flags & FS_NODUMP_FL)
867 xflags |= XFS_XFLAG_NODUMP;
868 else
869 xflags &= ~XFS_XFLAG_NODUMP;
870
871 return xflags;
872 }
873
874 STATIC unsigned int
875 xfs_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
893 STATIC int
894 xfs_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_projid = xfs_get_projid(ip);
907
908 if (attr) {
909 if (ip->i_afp) {
910 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
911 fa.fsx_nextents = ip->i_afp->if_bytes /
912 sizeof(xfs_bmbt_rec_t);
913 else
914 fa.fsx_nextents = ip->i_d.di_anextents;
915 } else
916 fa.fsx_nextents = 0;
917 } else {
918 if (ip->i_df.if_flags & XFS_IFEXTENTS)
919 fa.fsx_nextents = ip->i_df.if_bytes /
920 sizeof(xfs_bmbt_rec_t);
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
931 STATIC void
932 xfs_set_diflags(
933 struct xfs_inode *ip,
934 unsigned int xflags)
935 {
936 unsigned int di_flags;
937
938 /* can't set PREALLOC this way, just preserve it */
939 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
940 if (xflags & XFS_XFLAG_IMMUTABLE)
941 di_flags |= XFS_DIFLAG_IMMUTABLE;
942 if (xflags & XFS_XFLAG_APPEND)
943 di_flags |= XFS_DIFLAG_APPEND;
944 if (xflags & XFS_XFLAG_SYNC)
945 di_flags |= XFS_DIFLAG_SYNC;
946 if (xflags & XFS_XFLAG_NOATIME)
947 di_flags |= XFS_DIFLAG_NOATIME;
948 if (xflags & XFS_XFLAG_NODUMP)
949 di_flags |= XFS_DIFLAG_NODUMP;
950 if (xflags & XFS_XFLAG_NODEFRAG)
951 di_flags |= XFS_DIFLAG_NODEFRAG;
952 if (xflags & XFS_XFLAG_FILESTREAM)
953 di_flags |= XFS_DIFLAG_FILESTREAM;
954 if (S_ISDIR(ip->i_d.di_mode)) {
955 if (xflags & XFS_XFLAG_RTINHERIT)
956 di_flags |= XFS_DIFLAG_RTINHERIT;
957 if (xflags & XFS_XFLAG_NOSYMLINKS)
958 di_flags |= XFS_DIFLAG_NOSYMLINKS;
959 if (xflags & XFS_XFLAG_EXTSZINHERIT)
960 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
961 if (xflags & XFS_XFLAG_PROJINHERIT)
962 di_flags |= XFS_DIFLAG_PROJINHERIT;
963 } else if (S_ISREG(ip->i_d.di_mode)) {
964 if (xflags & XFS_XFLAG_REALTIME)
965 di_flags |= XFS_DIFLAG_REALTIME;
966 if (xflags & XFS_XFLAG_EXTSIZE)
967 di_flags |= XFS_DIFLAG_EXTSIZE;
968 }
969
970 ip->i_d.di_flags = di_flags;
971 }
972
973 STATIC void
974 xfs_diflags_to_linux(
975 struct xfs_inode *ip)
976 {
977 struct inode *inode = VFS_I(ip);
978 unsigned int xflags = xfs_ip2xflags(ip);
979
980 if (xflags & XFS_XFLAG_IMMUTABLE)
981 inode->i_flags |= S_IMMUTABLE;
982 else
983 inode->i_flags &= ~S_IMMUTABLE;
984 if (xflags & XFS_XFLAG_APPEND)
985 inode->i_flags |= S_APPEND;
986 else
987 inode->i_flags &= ~S_APPEND;
988 if (xflags & XFS_XFLAG_SYNC)
989 inode->i_flags |= S_SYNC;
990 else
991 inode->i_flags &= ~S_SYNC;
992 if (xflags & XFS_XFLAG_NOATIME)
993 inode->i_flags |= S_NOATIME;
994 else
995 inode->i_flags &= ~S_NOATIME;
996 }
997
998 static int
999 xfs_ioctl_setattr_xflags(
1000 struct xfs_trans *tp,
1001 struct xfs_inode *ip,
1002 struct fsxattr *fa)
1003 {
1004 struct xfs_mount *mp = ip->i_mount;
1005
1006 /* Can't change realtime flag if any extents are allocated. */
1007 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1008 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME))
1009 return -EINVAL;
1010
1011 /* If realtime flag is set then must have realtime device */
1012 if (fa->fsx_xflags & XFS_XFLAG_REALTIME) {
1013 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1014 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1015 return -EINVAL;
1016 }
1017
1018 /*
1019 * Can't modify an immutable/append-only file unless
1020 * we have appropriate permission.
1021 */
1022 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1023 (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1024 !capable(CAP_LINUX_IMMUTABLE))
1025 return -EPERM;
1026
1027 xfs_set_diflags(ip, fa->fsx_xflags);
1028 xfs_diflags_to_linux(ip);
1029 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1030 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1031 XFS_STATS_INC(xs_ig_attrchg);
1032 return 0;
1033 }
1034
1035 /*
1036 * Set up the transaction structure for the setattr operation, checking that we
1037 * have permission to do so. On success, return a clean transaction and the
1038 * inode locked exclusively ready for further operation specific checks. On
1039 * failure, return an error without modifying or locking the inode.
1040 */
1041 static struct xfs_trans *
1042 xfs_ioctl_setattr_get_trans(
1043 struct xfs_inode *ip)
1044 {
1045 struct xfs_mount *mp = ip->i_mount;
1046 struct xfs_trans *tp;
1047 int error;
1048
1049 if (mp->m_flags & XFS_MOUNT_RDONLY)
1050 return ERR_PTR(-EROFS);
1051 if (XFS_FORCED_SHUTDOWN(mp))
1052 return ERR_PTR(-EIO);
1053
1054 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1055 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1056 if (error)
1057 goto out_cancel;
1058
1059 xfs_ilock(ip, XFS_ILOCK_EXCL);
1060 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1061
1062 /*
1063 * CAP_FOWNER overrides the following restrictions:
1064 *
1065 * The user ID of the calling process must be equal to the file owner
1066 * ID, except in cases where the CAP_FSETID capability is applicable.
1067 */
1068 if (!inode_owner_or_capable(VFS_I(ip))) {
1069 error = -EPERM;
1070 goto out_cancel;
1071 }
1072
1073 if (mp->m_flags & XFS_MOUNT_WSYNC)
1074 xfs_trans_set_sync(tp);
1075
1076 return tp;
1077
1078 out_cancel:
1079 xfs_trans_cancel(tp, 0);
1080 return ERR_PTR(error);
1081 }
1082
1083 /*
1084 * extent size hint validation is somewhat cumbersome. Rules are:
1085 *
1086 * 1. extent size hint is only valid for directories and regular files
1087 * 2. XFS_XFLAG_EXTSIZE is only valid for regular files
1088 * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories.
1089 * 4. can only be changed on regular files if no extents are allocated
1090 * 5. can be changed on directories at any time
1091 * 6. extsize hint of 0 turns off hints, clears inode flags.
1092 * 7. Extent size must be a multiple of the appropriate block size.
1093 * 8. for non-realtime files, the extent size hint must be limited
1094 * to half the AG size to avoid alignment extending the extent beyond the
1095 * limits of the AG.
1096 */
1097 static int
1098 xfs_ioctl_setattr_check_extsize(
1099 struct xfs_inode *ip,
1100 struct fsxattr *fa)
1101 {
1102 struct xfs_mount *mp = ip->i_mount;
1103
1104 if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
1105 return -EINVAL;
1106
1107 if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) &&
1108 !S_ISDIR(ip->i_d.di_mode))
1109 return -EINVAL;
1110
1111 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents &&
1112 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1113 return -EINVAL;
1114
1115 if (fa->fsx_extsize != 0) {
1116 xfs_extlen_t size;
1117 xfs_fsblock_t extsize_fsb;
1118
1119 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1120 if (extsize_fsb > MAXEXTLEN)
1121 return -EINVAL;
1122
1123 if (XFS_IS_REALTIME_INODE(ip) ||
1124 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1125 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1126 } else {
1127 size = mp->m_sb.sb_blocksize;
1128 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1129 return -EINVAL;
1130 }
1131
1132 if (fa->fsx_extsize % size)
1133 return -EINVAL;
1134 } else
1135 fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT);
1136
1137 return 0;
1138 }
1139
1140 static int
1141 xfs_ioctl_setattr_check_projid(
1142 struct xfs_inode *ip,
1143 struct fsxattr *fa)
1144 {
1145 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1146 if (fa->fsx_projid > (__uint16_t)-1 &&
1147 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1148 return -EINVAL;
1149
1150 /*
1151 * Project Quota ID state is only allowed to change from within the init
1152 * namespace. Enforce that restriction only if we are trying to change
1153 * the quota ID state. Everything else is allowed in user namespaces.
1154 */
1155 if (current_user_ns() == &init_user_ns)
1156 return 0;
1157
1158 if (xfs_get_projid(ip) != fa->fsx_projid)
1159 return -EINVAL;
1160 if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) !=
1161 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1162 return -EINVAL;
1163
1164 return 0;
1165 }
1166
1167 STATIC int
1168 xfs_ioctl_setattr(
1169 xfs_inode_t *ip,
1170 struct fsxattr *fa)
1171 {
1172 struct xfs_mount *mp = ip->i_mount;
1173 struct xfs_trans *tp;
1174 struct xfs_dquot *udqp = NULL;
1175 struct xfs_dquot *pdqp = NULL;
1176 struct xfs_dquot *olddquot = NULL;
1177 int code;
1178
1179 trace_xfs_ioctl_setattr(ip);
1180
1181 code = xfs_ioctl_setattr_check_projid(ip, fa);
1182 if (code)
1183 return code;
1184
1185 /*
1186 * If disk quotas is on, we make sure that the dquots do exist on disk,
1187 * before we start any other transactions. Trying to do this later
1188 * is messy. We don't care to take a readlock to look at the ids
1189 * in inode here, because we can't hold it across the trans_reserve.
1190 * If the IDs do change before we take the ilock, we're covered
1191 * because the i_*dquot fields will get updated anyway.
1192 */
1193 if (XFS_IS_QUOTA_ON(mp)) {
1194 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1195 ip->i_d.di_gid, fa->fsx_projid,
1196 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1197 if (code)
1198 return code;
1199 }
1200
1201 tp = xfs_ioctl_setattr_get_trans(ip);
1202 if (IS_ERR(tp)) {
1203 code = PTR_ERR(tp);
1204 goto error_free_dquots;
1205 }
1206
1207
1208 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1209 xfs_get_projid(ip) != fa->fsx_projid) {
1210 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1211 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1212 if (code) /* out of quota */
1213 goto error_trans_cancel;
1214 }
1215
1216 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1217 if (code)
1218 goto error_trans_cancel;
1219
1220 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1221 if (code)
1222 goto error_trans_cancel;
1223
1224 /*
1225 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1226 * overrides the following restrictions:
1227 *
1228 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1229 * successful return from chown()
1230 */
1231
1232 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1233 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1234 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1235
1236 /* Change the ownerships and register project quota modifications */
1237 if (xfs_get_projid(ip) != fa->fsx_projid) {
1238 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1239 olddquot = xfs_qm_vop_chown(tp, ip,
1240 &ip->i_pdquot, pdqp);
1241 }
1242 ASSERT(ip->i_d.di_version > 1);
1243 xfs_set_projid(ip, fa->fsx_projid);
1244 }
1245
1246 /*
1247 * Only set the extent size hint if we've already determined that the
1248 * extent size hint should be set on the inode. If no extent size flags
1249 * are set on the inode then unconditionally clear the extent size hint.
1250 */
1251 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1252 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1253 else
1254 ip->i_d.di_extsize = 0;
1255
1256 code = xfs_trans_commit(tp, 0);
1257
1258 /*
1259 * Release any dquot(s) the inode had kept before chown.
1260 */
1261 xfs_qm_dqrele(olddquot);
1262 xfs_qm_dqrele(udqp);
1263 xfs_qm_dqrele(pdqp);
1264
1265 return code;
1266
1267 error_trans_cancel:
1268 xfs_trans_cancel(tp, 0);
1269 error_free_dquots:
1270 xfs_qm_dqrele(udqp);
1271 xfs_qm_dqrele(pdqp);
1272 return code;
1273 }
1274
1275 STATIC int
1276 xfs_ioc_fssetxattr(
1277 xfs_inode_t *ip,
1278 struct file *filp,
1279 void __user *arg)
1280 {
1281 struct fsxattr fa;
1282 int error;
1283
1284 if (copy_from_user(&fa, arg, sizeof(fa)))
1285 return -EFAULT;
1286
1287 error = mnt_want_write_file(filp);
1288 if (error)
1289 return error;
1290 error = xfs_ioctl_setattr(ip, &fa);
1291 mnt_drop_write_file(filp);
1292 return error;
1293 }
1294
1295 STATIC int
1296 xfs_ioc_getxflags(
1297 xfs_inode_t *ip,
1298 void __user *arg)
1299 {
1300 unsigned int flags;
1301
1302 flags = xfs_di2lxflags(ip->i_d.di_flags);
1303 if (copy_to_user(arg, &flags, sizeof(flags)))
1304 return -EFAULT;
1305 return 0;
1306 }
1307
1308 STATIC int
1309 xfs_ioc_setxflags(
1310 struct xfs_inode *ip,
1311 struct file *filp,
1312 void __user *arg)
1313 {
1314 struct xfs_trans *tp;
1315 struct fsxattr fa;
1316 unsigned int flags;
1317 int error;
1318
1319 if (copy_from_user(&flags, arg, sizeof(flags)))
1320 return -EFAULT;
1321
1322 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1323 FS_NOATIME_FL | FS_NODUMP_FL | \
1324 FS_SYNC_FL))
1325 return -EOPNOTSUPP;
1326
1327 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1328
1329 error = mnt_want_write_file(filp);
1330 if (error)
1331 return error;
1332
1333 tp = xfs_ioctl_setattr_get_trans(ip);
1334 if (IS_ERR(tp)) {
1335 error = PTR_ERR(tp);
1336 goto out_drop_write;
1337 }
1338
1339 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1340 if (error) {
1341 xfs_trans_cancel(tp, 0);
1342 goto out_drop_write;
1343 }
1344
1345 error = xfs_trans_commit(tp, 0);
1346 out_drop_write:
1347 mnt_drop_write_file(filp);
1348 return error;
1349 }
1350
1351 STATIC int
1352 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1353 {
1354 struct getbmap __user *base = (struct getbmap __user *)*ap;
1355
1356 /* copy only getbmap portion (not getbmapx) */
1357 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1358 return -EFAULT;
1359
1360 *ap += sizeof(struct getbmap);
1361 return 0;
1362 }
1363
1364 STATIC int
1365 xfs_ioc_getbmap(
1366 struct xfs_inode *ip,
1367 int ioflags,
1368 unsigned int cmd,
1369 void __user *arg)
1370 {
1371 struct getbmapx bmx;
1372 int error;
1373
1374 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1375 return -EFAULT;
1376
1377 if (bmx.bmv_count < 2)
1378 return -EINVAL;
1379
1380 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1381 if (ioflags & XFS_IO_INVIS)
1382 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1383
1384 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1385 (__force struct getbmap *)arg+1);
1386 if (error)
1387 return error;
1388
1389 /* copy back header - only size of getbmap */
1390 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1391 return -EFAULT;
1392 return 0;
1393 }
1394
1395 STATIC int
1396 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1397 {
1398 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1399
1400 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1401 return -EFAULT;
1402
1403 *ap += sizeof(struct getbmapx);
1404 return 0;
1405 }
1406
1407 STATIC int
1408 xfs_ioc_getbmapx(
1409 struct xfs_inode *ip,
1410 void __user *arg)
1411 {
1412 struct getbmapx bmx;
1413 int error;
1414
1415 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1416 return -EFAULT;
1417
1418 if (bmx.bmv_count < 2)
1419 return -EINVAL;
1420
1421 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1422 return -EINVAL;
1423
1424 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1425 (__force struct getbmapx *)arg+1);
1426 if (error)
1427 return error;
1428
1429 /* copy back header */
1430 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1431 return -EFAULT;
1432
1433 return 0;
1434 }
1435
1436 int
1437 xfs_ioc_swapext(
1438 xfs_swapext_t *sxp)
1439 {
1440 xfs_inode_t *ip, *tip;
1441 struct fd f, tmp;
1442 int error = 0;
1443
1444 /* Pull information for the target fd */
1445 f = fdget((int)sxp->sx_fdtarget);
1446 if (!f.file) {
1447 error = -EINVAL;
1448 goto out;
1449 }
1450
1451 if (!(f.file->f_mode & FMODE_WRITE) ||
1452 !(f.file->f_mode & FMODE_READ) ||
1453 (f.file->f_flags & O_APPEND)) {
1454 error = -EBADF;
1455 goto out_put_file;
1456 }
1457
1458 tmp = fdget((int)sxp->sx_fdtmp);
1459 if (!tmp.file) {
1460 error = -EINVAL;
1461 goto out_put_file;
1462 }
1463
1464 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1465 !(tmp.file->f_mode & FMODE_READ) ||
1466 (tmp.file->f_flags & O_APPEND)) {
1467 error = -EBADF;
1468 goto out_put_tmp_file;
1469 }
1470
1471 if (IS_SWAPFILE(file_inode(f.file)) ||
1472 IS_SWAPFILE(file_inode(tmp.file))) {
1473 error = -EINVAL;
1474 goto out_put_tmp_file;
1475 }
1476
1477 ip = XFS_I(file_inode(f.file));
1478 tip = XFS_I(file_inode(tmp.file));
1479
1480 if (ip->i_mount != tip->i_mount) {
1481 error = -EINVAL;
1482 goto out_put_tmp_file;
1483 }
1484
1485 if (ip->i_ino == tip->i_ino) {
1486 error = -EINVAL;
1487 goto out_put_tmp_file;
1488 }
1489
1490 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1491 error = -EIO;
1492 goto out_put_tmp_file;
1493 }
1494
1495 error = xfs_swap_extents(ip, tip, sxp);
1496
1497 out_put_tmp_file:
1498 fdput(tmp);
1499 out_put_file:
1500 fdput(f);
1501 out:
1502 return error;
1503 }
1504
1505 /*
1506 * Note: some of the ioctl's return positive numbers as a
1507 * byte count indicating success, such as readlink_by_handle.
1508 * So we don't "sign flip" like most other routines. This means
1509 * true errors need to be returned as a negative value.
1510 */
1511 long
1512 xfs_file_ioctl(
1513 struct file *filp,
1514 unsigned int cmd,
1515 unsigned long p)
1516 {
1517 struct inode *inode = file_inode(filp);
1518 struct xfs_inode *ip = XFS_I(inode);
1519 struct xfs_mount *mp = ip->i_mount;
1520 void __user *arg = (void __user *)p;
1521 int ioflags = 0;
1522 int error;
1523
1524 if (filp->f_mode & FMODE_NOCMTIME)
1525 ioflags |= XFS_IO_INVIS;
1526
1527 trace_xfs_file_ioctl(ip);
1528
1529 switch (cmd) {
1530 case FITRIM:
1531 return xfs_ioc_trim(mp, arg);
1532 case XFS_IOC_ALLOCSP:
1533 case XFS_IOC_FREESP:
1534 case XFS_IOC_RESVSP:
1535 case XFS_IOC_UNRESVSP:
1536 case XFS_IOC_ALLOCSP64:
1537 case XFS_IOC_FREESP64:
1538 case XFS_IOC_RESVSP64:
1539 case XFS_IOC_UNRESVSP64:
1540 case XFS_IOC_ZERO_RANGE: {
1541 xfs_flock64_t bf;
1542
1543 if (copy_from_user(&bf, arg, sizeof(bf)))
1544 return -EFAULT;
1545 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1546 }
1547 case XFS_IOC_DIOINFO: {
1548 struct dioattr da;
1549 xfs_buftarg_t *target =
1550 XFS_IS_REALTIME_INODE(ip) ?
1551 mp->m_rtdev_targp : mp->m_ddev_targp;
1552
1553 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1554 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1555
1556 if (copy_to_user(arg, &da, sizeof(da)))
1557 return -EFAULT;
1558 return 0;
1559 }
1560
1561 case XFS_IOC_FSBULKSTAT_SINGLE:
1562 case XFS_IOC_FSBULKSTAT:
1563 case XFS_IOC_FSINUMBERS:
1564 return xfs_ioc_bulkstat(mp, cmd, arg);
1565
1566 case XFS_IOC_FSGEOMETRY_V1:
1567 return xfs_ioc_fsgeometry_v1(mp, arg);
1568
1569 case XFS_IOC_FSGEOMETRY:
1570 return xfs_ioc_fsgeometry(mp, arg);
1571
1572 case XFS_IOC_GETVERSION:
1573 return put_user(inode->i_generation, (int __user *)arg);
1574
1575 case XFS_IOC_FSGETXATTR:
1576 return xfs_ioc_fsgetxattr(ip, 0, arg);
1577 case XFS_IOC_FSGETXATTRA:
1578 return xfs_ioc_fsgetxattr(ip, 1, arg);
1579 case XFS_IOC_FSSETXATTR:
1580 return xfs_ioc_fssetxattr(ip, filp, arg);
1581 case XFS_IOC_GETXFLAGS:
1582 return xfs_ioc_getxflags(ip, arg);
1583 case XFS_IOC_SETXFLAGS:
1584 return xfs_ioc_setxflags(ip, filp, arg);
1585
1586 case XFS_IOC_FSSETDM: {
1587 struct fsdmidata dmi;
1588
1589 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1590 return -EFAULT;
1591
1592 error = mnt_want_write_file(filp);
1593 if (error)
1594 return error;
1595
1596 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1597 dmi.fsd_dmstate);
1598 mnt_drop_write_file(filp);
1599 return error;
1600 }
1601
1602 case XFS_IOC_GETBMAP:
1603 case XFS_IOC_GETBMAPA:
1604 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1605
1606 case XFS_IOC_GETBMAPX:
1607 return xfs_ioc_getbmapx(ip, arg);
1608
1609 case XFS_IOC_FD_TO_HANDLE:
1610 case XFS_IOC_PATH_TO_HANDLE:
1611 case XFS_IOC_PATH_TO_FSHANDLE: {
1612 xfs_fsop_handlereq_t hreq;
1613
1614 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1615 return -EFAULT;
1616 return xfs_find_handle(cmd, &hreq);
1617 }
1618 case XFS_IOC_OPEN_BY_HANDLE: {
1619 xfs_fsop_handlereq_t hreq;
1620
1621 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1622 return -EFAULT;
1623 return xfs_open_by_handle(filp, &hreq);
1624 }
1625 case XFS_IOC_FSSETDM_BY_HANDLE:
1626 return xfs_fssetdm_by_handle(filp, arg);
1627
1628 case XFS_IOC_READLINK_BY_HANDLE: {
1629 xfs_fsop_handlereq_t hreq;
1630
1631 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1632 return -EFAULT;
1633 return xfs_readlink_by_handle(filp, &hreq);
1634 }
1635 case XFS_IOC_ATTRLIST_BY_HANDLE:
1636 return xfs_attrlist_by_handle(filp, arg);
1637
1638 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1639 return xfs_attrmulti_by_handle(filp, arg);
1640
1641 case XFS_IOC_SWAPEXT: {
1642 struct xfs_swapext sxp;
1643
1644 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1645 return -EFAULT;
1646 error = mnt_want_write_file(filp);
1647 if (error)
1648 return error;
1649 error = xfs_ioc_swapext(&sxp);
1650 mnt_drop_write_file(filp);
1651 return error;
1652 }
1653
1654 case XFS_IOC_FSCOUNTS: {
1655 xfs_fsop_counts_t out;
1656
1657 error = xfs_fs_counts(mp, &out);
1658 if (error)
1659 return error;
1660
1661 if (copy_to_user(arg, &out, sizeof(out)))
1662 return -EFAULT;
1663 return 0;
1664 }
1665
1666 case XFS_IOC_SET_RESBLKS: {
1667 xfs_fsop_resblks_t inout;
1668 __uint64_t in;
1669
1670 if (!capable(CAP_SYS_ADMIN))
1671 return -EPERM;
1672
1673 if (mp->m_flags & XFS_MOUNT_RDONLY)
1674 return -EROFS;
1675
1676 if (copy_from_user(&inout, arg, sizeof(inout)))
1677 return -EFAULT;
1678
1679 error = mnt_want_write_file(filp);
1680 if (error)
1681 return error;
1682
1683 /* input parameter is passed in resblks field of structure */
1684 in = inout.resblks;
1685 error = xfs_reserve_blocks(mp, &in, &inout);
1686 mnt_drop_write_file(filp);
1687 if (error)
1688 return error;
1689
1690 if (copy_to_user(arg, &inout, sizeof(inout)))
1691 return -EFAULT;
1692 return 0;
1693 }
1694
1695 case XFS_IOC_GET_RESBLKS: {
1696 xfs_fsop_resblks_t out;
1697
1698 if (!capable(CAP_SYS_ADMIN))
1699 return -EPERM;
1700
1701 error = xfs_reserve_blocks(mp, NULL, &out);
1702 if (error)
1703 return error;
1704
1705 if (copy_to_user(arg, &out, sizeof(out)))
1706 return -EFAULT;
1707
1708 return 0;
1709 }
1710
1711 case XFS_IOC_FSGROWFSDATA: {
1712 xfs_growfs_data_t in;
1713
1714 if (copy_from_user(&in, arg, sizeof(in)))
1715 return -EFAULT;
1716
1717 error = mnt_want_write_file(filp);
1718 if (error)
1719 return error;
1720 error = xfs_growfs_data(mp, &in);
1721 mnt_drop_write_file(filp);
1722 return error;
1723 }
1724
1725 case XFS_IOC_FSGROWFSLOG: {
1726 xfs_growfs_log_t in;
1727
1728 if (copy_from_user(&in, arg, sizeof(in)))
1729 return -EFAULT;
1730
1731 error = mnt_want_write_file(filp);
1732 if (error)
1733 return error;
1734 error = xfs_growfs_log(mp, &in);
1735 mnt_drop_write_file(filp);
1736 return error;
1737 }
1738
1739 case XFS_IOC_FSGROWFSRT: {
1740 xfs_growfs_rt_t in;
1741
1742 if (copy_from_user(&in, arg, sizeof(in)))
1743 return -EFAULT;
1744
1745 error = mnt_want_write_file(filp);
1746 if (error)
1747 return error;
1748 error = xfs_growfs_rt(mp, &in);
1749 mnt_drop_write_file(filp);
1750 return error;
1751 }
1752
1753 case XFS_IOC_GOINGDOWN: {
1754 __uint32_t in;
1755
1756 if (!capable(CAP_SYS_ADMIN))
1757 return -EPERM;
1758
1759 if (get_user(in, (__uint32_t __user *)arg))
1760 return -EFAULT;
1761
1762 return xfs_fs_goingdown(mp, in);
1763 }
1764
1765 case XFS_IOC_ERROR_INJECTION: {
1766 xfs_error_injection_t in;
1767
1768 if (!capable(CAP_SYS_ADMIN))
1769 return -EPERM;
1770
1771 if (copy_from_user(&in, arg, sizeof(in)))
1772 return -EFAULT;
1773
1774 return xfs_errortag_add(in.errtag, mp);
1775 }
1776
1777 case XFS_IOC_ERROR_CLEARALL:
1778 if (!capable(CAP_SYS_ADMIN))
1779 return -EPERM;
1780
1781 return xfs_errortag_clearall(mp, 1);
1782
1783 case XFS_IOC_FREE_EOFBLOCKS: {
1784 struct xfs_fs_eofblocks eofb;
1785 struct xfs_eofblocks keofb;
1786
1787 if (!capable(CAP_SYS_ADMIN))
1788 return -EPERM;
1789
1790 if (mp->m_flags & XFS_MOUNT_RDONLY)
1791 return -EROFS;
1792
1793 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1794 return -EFAULT;
1795
1796 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1797 if (error)
1798 return error;
1799
1800 return xfs_icache_free_eofblocks(mp, &keofb);
1801 }
1802
1803 default:
1804 return -ENOTTY;
1805 }
1806 }
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