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_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_mount.h"
27#include "xfs_inode.h"
28#include "xfs_ioctl.h"
29#include "xfs_alloc.h"
30#include "xfs_rtalloc.h"
31#include "xfs_itable.h"
32#include "xfs_error.h"
33#include "xfs_attr.h"
34#include "xfs_bmap.h"
35#include "xfs_bmap_util.h"
36#include "xfs_fsops.h"
37#include "xfs_discard.h"
38#include "xfs_quota.h"
39#include "xfs_export.h"
40#include "xfs_trace.h"
41#include "xfs_icache.h"
42#include "xfs_symlink.h"
43#include "xfs_dinode.h"
44#include "xfs_trans.h"
45
46#include <linux/capability.h>
47#include <linux/dcache.h>
48#include <linux/mount.h>
49#include <linux/namei.h>
50#include <linux/pagemap.h>
51#include <linux/slab.h>
52#include <linux/exportfs.h>
53
54/*
55 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
56 * a file or fs handle.
57 *
58 * XFS_IOC_PATH_TO_FSHANDLE
59 * returns fs handle for a mount point or path within that mount point
60 * XFS_IOC_FD_TO_HANDLE
61 * returns full handle for a FD opened in user space
62 * XFS_IOC_PATH_TO_HANDLE
63 * returns full handle for a path
64 */
65int
66xfs_find_handle(
67 unsigned int cmd,
68 xfs_fsop_handlereq_t *hreq)
69{
70 int hsize;
71 xfs_handle_t handle;
72 struct inode *inode;
73 struct fd f = {NULL};
74 struct path path;
75 int error;
76 struct xfs_inode *ip;
77
78 if (cmd == XFS_IOC_FD_TO_HANDLE) {
79 f = fdget(hreq->fd);
80 if (!f.file)
81 return -EBADF;
82 inode = file_inode(f.file);
83 } else {
84 error = user_lpath((const char __user *)hreq->path, &path);
85 if (error)
86 return error;
87 inode = path.dentry->d_inode;
88 }
89 ip = XFS_I(inode);
90
91 /*
92 * We can only generate handles for inodes residing on a XFS filesystem,
93 * and only for regular files, directories or symbolic links.
94 */
95 error = -EINVAL;
96 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
97 goto out_put;
98
99 error = -EBADF;
100 if (!S_ISREG(inode->i_mode) &&
101 !S_ISDIR(inode->i_mode) &&
102 !S_ISLNK(inode->i_mode))
103 goto out_put;
104
105
106 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
107
108 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
109 /*
110 * This handle only contains an fsid, zero the rest.
111 */
112 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
113 hsize = sizeof(xfs_fsid_t);
114 } else {
115 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
116 sizeof(handle.ha_fid.fid_len);
117 handle.ha_fid.fid_pad = 0;
118 handle.ha_fid.fid_gen = ip->i_d.di_gen;
119 handle.ha_fid.fid_ino = ip->i_ino;
120
121 hsize = XFS_HSIZE(handle);
122 }
123
124 error = -EFAULT;
125 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
126 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
127 goto out_put;
128
129 error = 0;
130
131 out_put:
132 if (cmd == XFS_IOC_FD_TO_HANDLE)
133 fdput(f);
134 else
135 path_put(&path);
136 return error;
137}
138
139/*
140 * No need to do permission checks on the various pathname components
141 * as the handle operations are privileged.
142 */
143STATIC int
144xfs_handle_acceptable(
145 void *context,
146 struct dentry *dentry)
147{
148 return 1;
149}
150
151/*
152 * Convert userspace handle data into a dentry.
153 */
154struct dentry *
155xfs_handle_to_dentry(
156 struct file *parfilp,
157 void __user *uhandle,
158 u32 hlen)
159{
160 xfs_handle_t handle;
161 struct xfs_fid64 fid;
162
163 /*
164 * Only allow handle opens under a directory.
165 */
166 if (!S_ISDIR(file_inode(parfilp)->i_mode))
167 return ERR_PTR(-ENOTDIR);
168
169 if (hlen != sizeof(xfs_handle_t))
170 return ERR_PTR(-EINVAL);
171 if (copy_from_user(&handle, uhandle, hlen))
172 return ERR_PTR(-EFAULT);
173 if (handle.ha_fid.fid_len !=
174 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
175 return ERR_PTR(-EINVAL);
176
177 memset(&fid, 0, sizeof(struct fid));
178 fid.ino = handle.ha_fid.fid_ino;
179 fid.gen = handle.ha_fid.fid_gen;
180
181 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
182 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
183 xfs_handle_acceptable, NULL);
184}
185
186STATIC struct dentry *
187xfs_handlereq_to_dentry(
188 struct file *parfilp,
189 xfs_fsop_handlereq_t *hreq)
190{
191 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
192}
193
194int
195xfs_open_by_handle(
196 struct file *parfilp,
197 xfs_fsop_handlereq_t *hreq)
198{
199 const struct cred *cred = current_cred();
200 int error;
201 int fd;
202 int permflag;
203 struct file *filp;
204 struct inode *inode;
205 struct dentry *dentry;
206 fmode_t fmode;
207 struct path path;
208
209 if (!capable(CAP_SYS_ADMIN))
210 return -XFS_ERROR(EPERM);
211
212 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
213 if (IS_ERR(dentry))
214 return PTR_ERR(dentry);
215 inode = dentry->d_inode;
216
217 /* Restrict xfs_open_by_handle to directories & regular files. */
218 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
219 error = -XFS_ERROR(EPERM);
220 goto out_dput;
221 }
222
223#if BITS_PER_LONG != 32
224 hreq->oflags |= O_LARGEFILE;
225#endif
226
227 permflag = hreq->oflags;
228 fmode = OPEN_FMODE(permflag);
229 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
230 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
231 error = -XFS_ERROR(EPERM);
232 goto out_dput;
233 }
234
235 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
236 error = -XFS_ERROR(EACCES);
237 goto out_dput;
238 }
239
240 /* Can't write directories. */
241 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
242 error = -XFS_ERROR(EISDIR);
243 goto out_dput;
244 }
245
246 fd = get_unused_fd_flags(0);
247 if (fd < 0) {
248 error = fd;
249 goto out_dput;
250 }
251
252 path.mnt = parfilp->f_path.mnt;
253 path.dentry = dentry;
254 filp = dentry_open(&path, hreq->oflags, cred);
255 dput(dentry);
256 if (IS_ERR(filp)) {
257 put_unused_fd(fd);
258 return PTR_ERR(filp);
259 }
260
261 if (S_ISREG(inode->i_mode)) {
262 filp->f_flags |= O_NOATIME;
263 filp->f_mode |= FMODE_NOCMTIME;
264 }
265
266 fd_install(fd, filp);
267 return fd;
268
269 out_dput:
270 dput(dentry);
271 return error;
272}
273
274int
275xfs_readlink_by_handle(
276 struct file *parfilp,
277 xfs_fsop_handlereq_t *hreq)
278{
279 struct dentry *dentry;
280 __u32 olen;
281 void *link;
282 int error;
283
284 if (!capable(CAP_SYS_ADMIN))
285 return -XFS_ERROR(EPERM);
286
287 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
288 if (IS_ERR(dentry))
289 return PTR_ERR(dentry);
290
291 /* Restrict this handle operation to symlinks only. */
292 if (!S_ISLNK(dentry->d_inode->i_mode)) {
293 error = -XFS_ERROR(EINVAL);
294 goto out_dput;
295 }
296
297 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
298 error = -XFS_ERROR(EFAULT);
299 goto out_dput;
300 }
301
302 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
303 if (!link) {
304 error = -XFS_ERROR(ENOMEM);
305 goto out_dput;
306 }
307
308 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
309 if (error)
310 goto out_kfree;
311 error = readlink_copy(hreq->ohandle, olen, link);
312 if (error)
313 goto out_kfree;
314
315 out_kfree:
316 kfree(link);
317 out_dput:
318 dput(dentry);
319 return error;
320}
321
322int
323xfs_set_dmattrs(
324 xfs_inode_t *ip,
325 u_int evmask,
326 u_int16_t state)
327{
328 xfs_mount_t *mp = ip->i_mount;
329 xfs_trans_t *tp;
330 int error;
331
332 if (!capable(CAP_SYS_ADMIN))
333 return XFS_ERROR(EPERM);
334
335 if (XFS_FORCED_SHUTDOWN(mp))
336 return XFS_ERROR(EIO);
337
338 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
339 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
340 if (error) {
341 xfs_trans_cancel(tp, 0);
342 return error;
343 }
344 xfs_ilock(ip, XFS_ILOCK_EXCL);
345 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
346
347 ip->i_d.di_dmevmask = evmask;
348 ip->i_d.di_dmstate = state;
349
350 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
351 error = xfs_trans_commit(tp, 0);
352
353 return error;
354}
355
356STATIC int
357xfs_fssetdm_by_handle(
358 struct file *parfilp,
359 void __user *arg)
360{
361 int error;
362 struct fsdmidata fsd;
363 xfs_fsop_setdm_handlereq_t dmhreq;
364 struct dentry *dentry;
365
366 if (!capable(CAP_MKNOD))
367 return -XFS_ERROR(EPERM);
368 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
369 return -XFS_ERROR(EFAULT);
370
371 error = mnt_want_write_file(parfilp);
372 if (error)
373 return error;
374
375 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
376 if (IS_ERR(dentry)) {
377 mnt_drop_write_file(parfilp);
378 return PTR_ERR(dentry);
379 }
380
381 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
382 error = -XFS_ERROR(EPERM);
383 goto out;
384 }
385
386 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
387 error = -XFS_ERROR(EFAULT);
388 goto out;
389 }
390
391 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
392 fsd.fsd_dmstate);
393
394 out:
395 mnt_drop_write_file(parfilp);
396 dput(dentry);
397 return error;
398}
399
400STATIC int
401xfs_attrlist_by_handle(
402 struct file *parfilp,
403 void __user *arg)
404{
405 int error = -ENOMEM;
406 attrlist_cursor_kern_t *cursor;
407 xfs_fsop_attrlist_handlereq_t al_hreq;
408 struct dentry *dentry;
409 char *kbuf;
410
411 if (!capable(CAP_SYS_ADMIN))
412 return -XFS_ERROR(EPERM);
413 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
414 return -XFS_ERROR(EFAULT);
415 if (al_hreq.buflen < sizeof(struct attrlist) ||
416 al_hreq.buflen > XATTR_LIST_MAX)
417 return -XFS_ERROR(EINVAL);
418
419 /*
420 * Reject flags, only allow namespaces.
421 */
422 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
423 return -XFS_ERROR(EINVAL);
424
425 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
426 if (IS_ERR(dentry))
427 return PTR_ERR(dentry);
428
429 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
430 if (!kbuf)
431 goto out_dput;
432
433 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
434 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
435 al_hreq.flags, cursor);
436 if (error)
437 goto out_kfree;
438
439 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
440 error = -EFAULT;
441
442out_kfree:
443 kmem_free(kbuf);
444out_dput:
445 dput(dentry);
446 return error;
447}
448
449int
450xfs_attrmulti_attr_get(
451 struct inode *inode,
452 unsigned char *name,
453 unsigned char __user *ubuf,
454 __uint32_t *len,
455 __uint32_t flags)
456{
457 unsigned char *kbuf;
458 int error = EFAULT;
459
460 if (*len > XATTR_SIZE_MAX)
461 return EINVAL;
462 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
463 if (!kbuf)
464 return ENOMEM;
465
466 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
467 if (error)
468 goto out_kfree;
469
470 if (copy_to_user(ubuf, kbuf, *len))
471 error = EFAULT;
472
473out_kfree:
474 kmem_free(kbuf);
475 return error;
476}
477
478int
479xfs_attrmulti_attr_set(
480 struct inode *inode,
481 unsigned char *name,
482 const unsigned char __user *ubuf,
483 __uint32_t len,
484 __uint32_t flags)
485{
486 unsigned char *kbuf;
487 int error = EFAULT;
488
489 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
490 return EPERM;
491 if (len > XATTR_SIZE_MAX)
492 return EINVAL;
493
494 kbuf = memdup_user(ubuf, len);
495 if (IS_ERR(kbuf))
496 return PTR_ERR(kbuf);
497
498 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
499
500 return error;
501}
502
503int
504xfs_attrmulti_attr_remove(
505 struct inode *inode,
506 unsigned char *name,
507 __uint32_t flags)
508{
509 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
510 return EPERM;
511 return xfs_attr_remove(XFS_I(inode), name, flags);
512}
513
514STATIC int
515xfs_attrmulti_by_handle(
516 struct file *parfilp,
517 void __user *arg)
518{
519 int error;
520 xfs_attr_multiop_t *ops;
521 xfs_fsop_attrmulti_handlereq_t am_hreq;
522 struct dentry *dentry;
523 unsigned int i, size;
524 unsigned char *attr_name;
525
526 if (!capable(CAP_SYS_ADMIN))
527 return -XFS_ERROR(EPERM);
528 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
529 return -XFS_ERROR(EFAULT);
530
531 /* overflow check */
532 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
533 return -E2BIG;
534
535 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
536 if (IS_ERR(dentry))
537 return PTR_ERR(dentry);
538
539 error = E2BIG;
540 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
541 if (!size || size > 16 * PAGE_SIZE)
542 goto out_dput;
543
544 ops = memdup_user(am_hreq.ops, size);
545 if (IS_ERR(ops)) {
546 error = PTR_ERR(ops);
547 goto out_dput;
548 }
549
550 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
551 if (!attr_name)
552 goto out_kfree_ops;
553
554 error = 0;
555 for (i = 0; i < am_hreq.opcount; i++) {
556 ops[i].am_error = strncpy_from_user((char *)attr_name,
557 ops[i].am_attrname, MAXNAMELEN);
558 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
559 error = -ERANGE;
560 if (ops[i].am_error < 0)
561 break;
562
563 switch (ops[i].am_opcode) {
564 case ATTR_OP_GET:
565 ops[i].am_error = xfs_attrmulti_attr_get(
566 dentry->d_inode, attr_name,
567 ops[i].am_attrvalue, &ops[i].am_length,
568 ops[i].am_flags);
569 break;
570 case ATTR_OP_SET:
571 ops[i].am_error = mnt_want_write_file(parfilp);
572 if (ops[i].am_error)
573 break;
574 ops[i].am_error = xfs_attrmulti_attr_set(
575 dentry->d_inode, attr_name,
576 ops[i].am_attrvalue, ops[i].am_length,
577 ops[i].am_flags);
578 mnt_drop_write_file(parfilp);
579 break;
580 case ATTR_OP_REMOVE:
581 ops[i].am_error = mnt_want_write_file(parfilp);
582 if (ops[i].am_error)
583 break;
584 ops[i].am_error = xfs_attrmulti_attr_remove(
585 dentry->d_inode, attr_name,
586 ops[i].am_flags);
587 mnt_drop_write_file(parfilp);
588 break;
589 default:
590 ops[i].am_error = EINVAL;
591 }
592 }
593
594 if (copy_to_user(am_hreq.ops, ops, size))
595 error = XFS_ERROR(EFAULT);
596
597 kfree(attr_name);
598 out_kfree_ops:
599 kfree(ops);
600 out_dput:
601 dput(dentry);
602 return -error;
603}
604
605int
606xfs_ioc_space(
607 struct xfs_inode *ip,
608 struct inode *inode,
609 struct file *filp,
610 int ioflags,
611 unsigned int cmd,
612 xfs_flock64_t *bf)
613{
614 struct xfs_mount *mp = ip->i_mount;
615 struct xfs_trans *tp;
616 struct iattr iattr;
617 bool setprealloc = false;
618 bool clrprealloc = false;
619 int error;
620
621 /*
622 * Only allow the sys admin to reserve space unless
623 * unwritten extents are enabled.
624 */
625 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
626 !capable(CAP_SYS_ADMIN))
627 return -XFS_ERROR(EPERM);
628
629 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
630 return -XFS_ERROR(EPERM);
631
632 if (!(filp->f_mode & FMODE_WRITE))
633 return -XFS_ERROR(EBADF);
634
635 if (!S_ISREG(inode->i_mode))
636 return -XFS_ERROR(EINVAL);
637
638 error = mnt_want_write_file(filp);
639 if (error)
640 return error;
641
642 xfs_ilock(ip, XFS_IOLOCK_EXCL);
643
644 switch (bf->l_whence) {
645 case 0: /*SEEK_SET*/
646 break;
647 case 1: /*SEEK_CUR*/
648 bf->l_start += filp->f_pos;
649 break;
650 case 2: /*SEEK_END*/
651 bf->l_start += XFS_ISIZE(ip);
652 break;
653 default:
654 error = XFS_ERROR(EINVAL);
655 goto out_unlock;
656 }
657
658 /*
659 * length of <= 0 for resv/unresv/zero is invalid. length for
660 * alloc/free is ignored completely and we have no idea what userspace
661 * might have set it to, so set it to zero to allow range
662 * checks to pass.
663 */
664 switch (cmd) {
665 case XFS_IOC_ZERO_RANGE:
666 case XFS_IOC_RESVSP:
667 case XFS_IOC_RESVSP64:
668 case XFS_IOC_UNRESVSP:
669 case XFS_IOC_UNRESVSP64:
670 if (bf->l_len <= 0) {
671 error = XFS_ERROR(EINVAL);
672 goto out_unlock;
673 }
674 break;
675 default:
676 bf->l_len = 0;
677 break;
678 }
679
680 if (bf->l_start < 0 ||
681 bf->l_start > mp->m_super->s_maxbytes ||
682 bf->l_start + bf->l_len < 0 ||
683 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
684 error = XFS_ERROR(EINVAL);
685 goto out_unlock;
686 }
687
688 switch (cmd) {
689 case XFS_IOC_ZERO_RANGE:
690 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
691 if (!error)
692 setprealloc = true;
693 break;
694 case XFS_IOC_RESVSP:
695 case XFS_IOC_RESVSP64:
696 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
697 XFS_BMAPI_PREALLOC);
698 if (!error)
699 setprealloc = true;
700 break;
701 case XFS_IOC_UNRESVSP:
702 case XFS_IOC_UNRESVSP64:
703 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
704 break;
705 case XFS_IOC_ALLOCSP:
706 case XFS_IOC_ALLOCSP64:
707 case XFS_IOC_FREESP:
708 case XFS_IOC_FREESP64:
709 if (bf->l_start > XFS_ISIZE(ip)) {
710 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
711 bf->l_start - XFS_ISIZE(ip), 0);
712 if (error)
713 goto out_unlock;
714 }
715
716 iattr.ia_valid = ATTR_SIZE;
717 iattr.ia_size = bf->l_start;
718
719 error = xfs_setattr_size(ip, &iattr);
720 if (!error)
721 clrprealloc = true;
722 break;
723 default:
724 ASSERT(0);
725 error = XFS_ERROR(EINVAL);
726 }
727
728 if (error)
729 goto out_unlock;
730
731 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
732 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
733 if (error) {
734 xfs_trans_cancel(tp, 0);
735 goto out_unlock;
736 }
737
738 xfs_ilock(ip, XFS_ILOCK_EXCL);
739 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
740
741 if (!(ioflags & IO_INVIS)) {
742 ip->i_d.di_mode &= ~S_ISUID;
743 if (ip->i_d.di_mode & S_IXGRP)
744 ip->i_d.di_mode &= ~S_ISGID;
745 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
746 }
747
748 if (setprealloc)
749 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
750 else if (clrprealloc)
751 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
752
753 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
754 if (filp->f_flags & O_DSYNC)
755 xfs_trans_set_sync(tp);
756 error = xfs_trans_commit(tp, 0);
757
758out_unlock:
759 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
760 mnt_drop_write_file(filp);
761 return -error;
762}
763
764STATIC int
765xfs_ioc_bulkstat(
766 xfs_mount_t *mp,
767 unsigned int cmd,
768 void __user *arg)
769{
770 xfs_fsop_bulkreq_t bulkreq;
771 int count; /* # of records returned */
772 xfs_ino_t inlast; /* last inode number */
773 int done;
774 int error;
775
776 /* done = 1 if there are more stats to get and if bulkstat */
777 /* should be called again (unused here, but used in dmapi) */
778
779 if (!capable(CAP_SYS_ADMIN))
780 return -EPERM;
781
782 if (XFS_FORCED_SHUTDOWN(mp))
783 return -XFS_ERROR(EIO);
784
785 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
786 return -XFS_ERROR(EFAULT);
787
788 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
789 return -XFS_ERROR(EFAULT);
790
791 if ((count = bulkreq.icount) <= 0)
792 return -XFS_ERROR(EINVAL);
793
794 if (bulkreq.ubuffer == NULL)
795 return -XFS_ERROR(EINVAL);
796
797 if (cmd == XFS_IOC_FSINUMBERS)
798 error = xfs_inumbers(mp, &inlast, &count,
799 bulkreq.ubuffer, xfs_inumbers_fmt);
800 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
801 error = xfs_bulkstat_single(mp, &inlast,
802 bulkreq.ubuffer, &done);
803 else /* XFS_IOC_FSBULKSTAT */
804 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
805 sizeof(xfs_bstat_t), bulkreq.ubuffer,
806 &done);
807
808 if (error)
809 return -error;
810
811 if (bulkreq.ocount != NULL) {
812 if (copy_to_user(bulkreq.lastip, &inlast,
813 sizeof(xfs_ino_t)))
814 return -XFS_ERROR(EFAULT);
815
816 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
817 return -XFS_ERROR(EFAULT);
818 }
819
820 return 0;
821}
822
823STATIC int
824xfs_ioc_fsgeometry_v1(
825 xfs_mount_t *mp,
826 void __user *arg)
827{
828 xfs_fsop_geom_t fsgeo;
829 int error;
830
831 error = xfs_fs_geometry(mp, &fsgeo, 3);
832 if (error)
833 return -error;
834
835 /*
836 * Caller should have passed an argument of type
837 * xfs_fsop_geom_v1_t. This is a proper subset of the
838 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
839 */
840 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
841 return -XFS_ERROR(EFAULT);
842 return 0;
843}
844
845STATIC int
846xfs_ioc_fsgeometry(
847 xfs_mount_t *mp,
848 void __user *arg)
849{
850 xfs_fsop_geom_t fsgeo;
851 int error;
852
853 error = xfs_fs_geometry(mp, &fsgeo, 4);
854 if (error)
855 return -error;
856
857 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
858 return -XFS_ERROR(EFAULT);
859 return 0;
860}
861
862/*
863 * Linux extended inode flags interface.
864 */
865
866STATIC unsigned int
867xfs_merge_ioc_xflags(
868 unsigned int flags,
869 unsigned int start)
870{
871 unsigned int xflags = start;
872
873 if (flags & FS_IMMUTABLE_FL)
874 xflags |= XFS_XFLAG_IMMUTABLE;
875 else
876 xflags &= ~XFS_XFLAG_IMMUTABLE;
877 if (flags & FS_APPEND_FL)
878 xflags |= XFS_XFLAG_APPEND;
879 else
880 xflags &= ~XFS_XFLAG_APPEND;
881 if (flags & FS_SYNC_FL)
882 xflags |= XFS_XFLAG_SYNC;
883 else
884 xflags &= ~XFS_XFLAG_SYNC;
885 if (flags & FS_NOATIME_FL)
886 xflags |= XFS_XFLAG_NOATIME;
887 else
888 xflags &= ~XFS_XFLAG_NOATIME;
889 if (flags & FS_NODUMP_FL)
890 xflags |= XFS_XFLAG_NODUMP;
891 else
892 xflags &= ~XFS_XFLAG_NODUMP;
893
894 return xflags;
895}
896
897STATIC unsigned int
898xfs_di2lxflags(
899 __uint16_t di_flags)
900{
901 unsigned int flags = 0;
902
903 if (di_flags & XFS_DIFLAG_IMMUTABLE)
904 flags |= FS_IMMUTABLE_FL;
905 if (di_flags & XFS_DIFLAG_APPEND)
906 flags |= FS_APPEND_FL;
907 if (di_flags & XFS_DIFLAG_SYNC)
908 flags |= FS_SYNC_FL;
909 if (di_flags & XFS_DIFLAG_NOATIME)
910 flags |= FS_NOATIME_FL;
911 if (di_flags & XFS_DIFLAG_NODUMP)
912 flags |= FS_NODUMP_FL;
913 return flags;
914}
915
916STATIC int
917xfs_ioc_fsgetxattr(
918 xfs_inode_t *ip,
919 int attr,
920 void __user *arg)
921{
922 struct fsxattr fa;
923
924 memset(&fa, 0, sizeof(struct fsxattr));
925
926 xfs_ilock(ip, XFS_ILOCK_SHARED);
927 fa.fsx_xflags = xfs_ip2xflags(ip);
928 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
929 fa.fsx_projid = xfs_get_projid(ip);
930
931 if (attr) {
932 if (ip->i_afp) {
933 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
934 fa.fsx_nextents = ip->i_afp->if_bytes /
935 sizeof(xfs_bmbt_rec_t);
936 else
937 fa.fsx_nextents = ip->i_d.di_anextents;
938 } else
939 fa.fsx_nextents = 0;
940 } else {
941 if (ip->i_df.if_flags & XFS_IFEXTENTS)
942 fa.fsx_nextents = ip->i_df.if_bytes /
943 sizeof(xfs_bmbt_rec_t);
944 else
945 fa.fsx_nextents = ip->i_d.di_nextents;
946 }
947 xfs_iunlock(ip, XFS_ILOCK_SHARED);
948
949 if (copy_to_user(arg, &fa, sizeof(fa)))
950 return -EFAULT;
951 return 0;
952}
953
954STATIC void
955xfs_set_diflags(
956 struct xfs_inode *ip,
957 unsigned int xflags)
958{
959 unsigned int di_flags;
960
961 /* can't set PREALLOC this way, just preserve it */
962 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
963 if (xflags & XFS_XFLAG_IMMUTABLE)
964 di_flags |= XFS_DIFLAG_IMMUTABLE;
965 if (xflags & XFS_XFLAG_APPEND)
966 di_flags |= XFS_DIFLAG_APPEND;
967 if (xflags & XFS_XFLAG_SYNC)
968 di_flags |= XFS_DIFLAG_SYNC;
969 if (xflags & XFS_XFLAG_NOATIME)
970 di_flags |= XFS_DIFLAG_NOATIME;
971 if (xflags & XFS_XFLAG_NODUMP)
972 di_flags |= XFS_DIFLAG_NODUMP;
973 if (xflags & XFS_XFLAG_PROJINHERIT)
974 di_flags |= XFS_DIFLAG_PROJINHERIT;
975 if (xflags & XFS_XFLAG_NODEFRAG)
976 di_flags |= XFS_DIFLAG_NODEFRAG;
977 if (xflags & XFS_XFLAG_FILESTREAM)
978 di_flags |= XFS_DIFLAG_FILESTREAM;
979 if (S_ISDIR(ip->i_d.di_mode)) {
980 if (xflags & XFS_XFLAG_RTINHERIT)
981 di_flags |= XFS_DIFLAG_RTINHERIT;
982 if (xflags & XFS_XFLAG_NOSYMLINKS)
983 di_flags |= XFS_DIFLAG_NOSYMLINKS;
984 if (xflags & XFS_XFLAG_EXTSZINHERIT)
985 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
986 } else if (S_ISREG(ip->i_d.di_mode)) {
987 if (xflags & XFS_XFLAG_REALTIME)
988 di_flags |= XFS_DIFLAG_REALTIME;
989 if (xflags & XFS_XFLAG_EXTSIZE)
990 di_flags |= XFS_DIFLAG_EXTSIZE;
991 }
992
993 ip->i_d.di_flags = di_flags;
994}
995
996STATIC void
997xfs_diflags_to_linux(
998 struct xfs_inode *ip)
999{
1000 struct inode *inode = VFS_I(ip);
1001 unsigned int xflags = xfs_ip2xflags(ip);
1002
1003 if (xflags & XFS_XFLAG_IMMUTABLE)
1004 inode->i_flags |= S_IMMUTABLE;
1005 else
1006 inode->i_flags &= ~S_IMMUTABLE;
1007 if (xflags & XFS_XFLAG_APPEND)
1008 inode->i_flags |= S_APPEND;
1009 else
1010 inode->i_flags &= ~S_APPEND;
1011 if (xflags & XFS_XFLAG_SYNC)
1012 inode->i_flags |= S_SYNC;
1013 else
1014 inode->i_flags &= ~S_SYNC;
1015 if (xflags & XFS_XFLAG_NOATIME)
1016 inode->i_flags |= S_NOATIME;
1017 else
1018 inode->i_flags &= ~S_NOATIME;
1019}
1020
1021#define FSX_PROJID 1
1022#define FSX_EXTSIZE 2
1023#define FSX_XFLAGS 4
1024#define FSX_NONBLOCK 8
1025
1026STATIC int
1027xfs_ioctl_setattr(
1028 xfs_inode_t *ip,
1029 struct fsxattr *fa,
1030 int mask)
1031{
1032 struct xfs_mount *mp = ip->i_mount;
1033 struct xfs_trans *tp;
1034 unsigned int lock_flags = 0;
1035 struct xfs_dquot *udqp = NULL;
1036 struct xfs_dquot *pdqp = NULL;
1037 struct xfs_dquot *olddquot = NULL;
1038 int code;
1039
1040 trace_xfs_ioctl_setattr(ip);
1041
1042 if (mp->m_flags & XFS_MOUNT_RDONLY)
1043 return XFS_ERROR(EROFS);
1044 if (XFS_FORCED_SHUTDOWN(mp))
1045 return XFS_ERROR(EIO);
1046
1047 /*
1048 * Disallow 32bit project ids when projid32bit feature is not enabled.
1049 */
1050 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
1051 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1052 return XFS_ERROR(EINVAL);
1053
1054 /*
1055 * If disk quotas is on, we make sure that the dquots do exist on disk,
1056 * before we start any other transactions. Trying to do this later
1057 * is messy. We don't care to take a readlock to look at the ids
1058 * in inode here, because we can't hold it across the trans_reserve.
1059 * If the IDs do change before we take the ilock, we're covered
1060 * because the i_*dquot fields will get updated anyway.
1061 */
1062 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
1063 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1064 ip->i_d.di_gid, fa->fsx_projid,
1065 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1066 if (code)
1067 return code;
1068 }
1069
1070 /*
1071 * For the other attributes, we acquire the inode lock and
1072 * first do an error checking pass.
1073 */
1074 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1075 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1076 if (code)
1077 goto error_return;
1078
1079 lock_flags = XFS_ILOCK_EXCL;
1080 xfs_ilock(ip, lock_flags);
1081
1082 /*
1083 * CAP_FOWNER overrides the following restrictions:
1084 *
1085 * The user ID of the calling process must be equal
1086 * to the file owner ID, except in cases where the
1087 * CAP_FSETID capability is applicable.
1088 */
1089 if (!inode_owner_or_capable(VFS_I(ip))) {
1090 code = XFS_ERROR(EPERM);
1091 goto error_return;
1092 }
1093
1094 /*
1095 * Do a quota reservation only if projid is actually going to change.
1096 * Only allow changing of projid from init_user_ns since it is a
1097 * non user namespace aware identifier.
1098 */
1099 if (mask & FSX_PROJID) {
1100 if (current_user_ns() != &init_user_ns) {
1101 code = XFS_ERROR(EINVAL);
1102 goto error_return;
1103 }
1104
1105 if (XFS_IS_QUOTA_RUNNING(mp) &&
1106 XFS_IS_PQUOTA_ON(mp) &&
1107 xfs_get_projid(ip) != fa->fsx_projid) {
1108 ASSERT(tp);
1109 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1110 pdqp, capable(CAP_FOWNER) ?
1111 XFS_QMOPT_FORCE_RES : 0);
1112 if (code) /* out of quota */
1113 goto error_return;
1114 }
1115 }
1116
1117 if (mask & FSX_EXTSIZE) {
1118 /*
1119 * Can't change extent size if any extents are allocated.
1120 */
1121 if (ip->i_d.di_nextents &&
1122 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1123 fa->fsx_extsize)) {
1124 code = XFS_ERROR(EINVAL); /* EFBIG? */
1125 goto error_return;
1126 }
1127
1128 /*
1129 * Extent size must be a multiple of the appropriate block
1130 * size, if set at all. It must also be smaller than the
1131 * maximum extent size supported by the filesystem.
1132 *
1133 * Also, for non-realtime files, limit the extent size hint to
1134 * half the size of the AGs in the filesystem so alignment
1135 * doesn't result in extents larger than an AG.
1136 */
1137 if (fa->fsx_extsize != 0) {
1138 xfs_extlen_t size;
1139 xfs_fsblock_t extsize_fsb;
1140
1141 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1142 if (extsize_fsb > MAXEXTLEN) {
1143 code = XFS_ERROR(EINVAL);
1144 goto error_return;
1145 }
1146
1147 if (XFS_IS_REALTIME_INODE(ip) ||
1148 ((mask & FSX_XFLAGS) &&
1149 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1150 size = mp->m_sb.sb_rextsize <<
1151 mp->m_sb.sb_blocklog;
1152 } else {
1153 size = mp->m_sb.sb_blocksize;
1154 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1155 code = XFS_ERROR(EINVAL);
1156 goto error_return;
1157 }
1158 }
1159
1160 if (fa->fsx_extsize % size) {
1161 code = XFS_ERROR(EINVAL);
1162 goto error_return;
1163 }
1164 }
1165 }
1166
1167
1168 if (mask & FSX_XFLAGS) {
1169 /*
1170 * Can't change realtime flag if any extents are allocated.
1171 */
1172 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1173 (XFS_IS_REALTIME_INODE(ip)) !=
1174 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1175 code = XFS_ERROR(EINVAL); /* EFBIG? */
1176 goto error_return;
1177 }
1178
1179 /*
1180 * If realtime flag is set then must have realtime data.
1181 */
1182 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1183 if ((mp->m_sb.sb_rblocks == 0) ||
1184 (mp->m_sb.sb_rextsize == 0) ||
1185 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1186 code = XFS_ERROR(EINVAL);
1187 goto error_return;
1188 }
1189 }
1190
1191 /*
1192 * Can't modify an immutable/append-only file unless
1193 * we have appropriate permission.
1194 */
1195 if ((ip->i_d.di_flags &
1196 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1197 (fa->fsx_xflags &
1198 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1199 !capable(CAP_LINUX_IMMUTABLE)) {
1200 code = XFS_ERROR(EPERM);
1201 goto error_return;
1202 }
1203 }
1204
1205 xfs_trans_ijoin(tp, ip, 0);
1206
1207 /*
1208 * Change file ownership. Must be the owner or privileged.
1209 */
1210 if (mask & FSX_PROJID) {
1211 /*
1212 * CAP_FSETID overrides the following restrictions:
1213 *
1214 * The set-user-ID and set-group-ID bits of a file will be
1215 * cleared upon successful return from chown()
1216 */
1217 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1218 !inode_capable(VFS_I(ip), CAP_FSETID))
1219 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1220
1221 /*
1222 * Change the ownerships and register quota modifications
1223 * in the transaction.
1224 */
1225 if (xfs_get_projid(ip) != fa->fsx_projid) {
1226 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1227 olddquot = xfs_qm_vop_chown(tp, ip,
1228 &ip->i_pdquot, pdqp);
1229 }
1230 xfs_set_projid(ip, fa->fsx_projid);
1231
1232 /*
1233 * We may have to rev the inode as well as
1234 * the superblock version number since projids didn't
1235 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1236 */
1237 if (ip->i_d.di_version == 1)
1238 xfs_bump_ino_vers2(tp, ip);
1239 }
1240
1241 }
1242
1243 if (mask & FSX_EXTSIZE)
1244 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1245 if (mask & FSX_XFLAGS) {
1246 xfs_set_diflags(ip, fa->fsx_xflags);
1247 xfs_diflags_to_linux(ip);
1248 }
1249
1250 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1251 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1252
1253 XFS_STATS_INC(xs_ig_attrchg);
1254
1255 /*
1256 * If this is a synchronous mount, make sure that the
1257 * transaction goes to disk before returning to the user.
1258 * This is slightly sub-optimal in that truncates require
1259 * two sync transactions instead of one for wsync filesystems.
1260 * One for the truncate and one for the timestamps since we
1261 * don't want to change the timestamps unless we're sure the
1262 * truncate worked. Truncates are less than 1% of the laddis
1263 * mix so this probably isn't worth the trouble to optimize.
1264 */
1265 if (mp->m_flags & XFS_MOUNT_WSYNC)
1266 xfs_trans_set_sync(tp);
1267 code = xfs_trans_commit(tp, 0);
1268 xfs_iunlock(ip, lock_flags);
1269
1270 /*
1271 * Release any dquot(s) the inode had kept before chown.
1272 */
1273 xfs_qm_dqrele(olddquot);
1274 xfs_qm_dqrele(udqp);
1275 xfs_qm_dqrele(pdqp);
1276
1277 return code;
1278
1279 error_return:
1280 xfs_qm_dqrele(udqp);
1281 xfs_qm_dqrele(pdqp);
1282 xfs_trans_cancel(tp, 0);
1283 if (lock_flags)
1284 xfs_iunlock(ip, lock_flags);
1285 return code;
1286}
1287
1288STATIC int
1289xfs_ioc_fssetxattr(
1290 xfs_inode_t *ip,
1291 struct file *filp,
1292 void __user *arg)
1293{
1294 struct fsxattr fa;
1295 unsigned int mask;
1296 int error;
1297
1298 if (copy_from_user(&fa, arg, sizeof(fa)))
1299 return -EFAULT;
1300
1301 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1302 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1303 mask |= FSX_NONBLOCK;
1304
1305 error = mnt_want_write_file(filp);
1306 if (error)
1307 return error;
1308 error = xfs_ioctl_setattr(ip, &fa, mask);
1309 mnt_drop_write_file(filp);
1310 return -error;
1311}
1312
1313STATIC int
1314xfs_ioc_getxflags(
1315 xfs_inode_t *ip,
1316 void __user *arg)
1317{
1318 unsigned int flags;
1319
1320 flags = xfs_di2lxflags(ip->i_d.di_flags);
1321 if (copy_to_user(arg, &flags, sizeof(flags)))
1322 return -EFAULT;
1323 return 0;
1324}
1325
1326STATIC int
1327xfs_ioc_setxflags(
1328 xfs_inode_t *ip,
1329 struct file *filp,
1330 void __user *arg)
1331{
1332 struct fsxattr fa;
1333 unsigned int flags;
1334 unsigned int mask;
1335 int error;
1336
1337 if (copy_from_user(&flags, arg, sizeof(flags)))
1338 return -EFAULT;
1339
1340 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1341 FS_NOATIME_FL | FS_NODUMP_FL | \
1342 FS_SYNC_FL))
1343 return -EOPNOTSUPP;
1344
1345 mask = FSX_XFLAGS;
1346 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1347 mask |= FSX_NONBLOCK;
1348 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1349
1350 error = mnt_want_write_file(filp);
1351 if (error)
1352 return error;
1353 error = xfs_ioctl_setattr(ip, &fa, mask);
1354 mnt_drop_write_file(filp);
1355 return -error;
1356}
1357
1358STATIC int
1359xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1360{
1361 struct getbmap __user *base = *ap;
1362
1363 /* copy only getbmap portion (not getbmapx) */
1364 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1365 return XFS_ERROR(EFAULT);
1366
1367 *ap += sizeof(struct getbmap);
1368 return 0;
1369}
1370
1371STATIC int
1372xfs_ioc_getbmap(
1373 struct xfs_inode *ip,
1374 int ioflags,
1375 unsigned int cmd,
1376 void __user *arg)
1377{
1378 struct getbmapx bmx;
1379 int error;
1380
1381 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1382 return -XFS_ERROR(EFAULT);
1383
1384 if (bmx.bmv_count < 2)
1385 return -XFS_ERROR(EINVAL);
1386
1387 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1388 if (ioflags & IO_INVIS)
1389 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1390
1391 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1392 (struct getbmap *)arg+1);
1393 if (error)
1394 return -error;
1395
1396 /* copy back header - only size of getbmap */
1397 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1398 return -XFS_ERROR(EFAULT);
1399 return 0;
1400}
1401
1402STATIC int
1403xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1404{
1405 struct getbmapx __user *base = *ap;
1406
1407 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1408 return XFS_ERROR(EFAULT);
1409
1410 *ap += sizeof(struct getbmapx);
1411 return 0;
1412}
1413
1414STATIC int
1415xfs_ioc_getbmapx(
1416 struct xfs_inode *ip,
1417 void __user *arg)
1418{
1419 struct getbmapx bmx;
1420 int error;
1421
1422 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1423 return -XFS_ERROR(EFAULT);
1424
1425 if (bmx.bmv_count < 2)
1426 return -XFS_ERROR(EINVAL);
1427
1428 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1429 return -XFS_ERROR(EINVAL);
1430
1431 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1432 (struct getbmapx *)arg+1);
1433 if (error)
1434 return -error;
1435
1436 /* copy back header */
1437 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1438 return -XFS_ERROR(EFAULT);
1439
1440 return 0;
1441}
1442
1443int
1444xfs_ioc_swapext(
1445 xfs_swapext_t *sxp)
1446{
1447 xfs_inode_t *ip, *tip;
1448 struct fd f, tmp;
1449 int error = 0;
1450
1451 /* Pull information for the target fd */
1452 f = fdget((int)sxp->sx_fdtarget);
1453 if (!f.file) {
1454 error = XFS_ERROR(EINVAL);
1455 goto out;
1456 }
1457
1458 if (!(f.file->f_mode & FMODE_WRITE) ||
1459 !(f.file->f_mode & FMODE_READ) ||
1460 (f.file->f_flags & O_APPEND)) {
1461 error = XFS_ERROR(EBADF);
1462 goto out_put_file;
1463 }
1464
1465 tmp = fdget((int)sxp->sx_fdtmp);
1466 if (!tmp.file) {
1467 error = XFS_ERROR(EINVAL);
1468 goto out_put_file;
1469 }
1470
1471 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1472 !(tmp.file->f_mode & FMODE_READ) ||
1473 (tmp.file->f_flags & O_APPEND)) {
1474 error = XFS_ERROR(EBADF);
1475 goto out_put_tmp_file;
1476 }
1477
1478 if (IS_SWAPFILE(file_inode(f.file)) ||
1479 IS_SWAPFILE(file_inode(tmp.file))) {
1480 error = XFS_ERROR(EINVAL);
1481 goto out_put_tmp_file;
1482 }
1483
1484 ip = XFS_I(file_inode(f.file));
1485 tip = XFS_I(file_inode(tmp.file));
1486
1487 if (ip->i_mount != tip->i_mount) {
1488 error = XFS_ERROR(EINVAL);
1489 goto out_put_tmp_file;
1490 }
1491
1492 if (ip->i_ino == tip->i_ino) {
1493 error = XFS_ERROR(EINVAL);
1494 goto out_put_tmp_file;
1495 }
1496
1497 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1498 error = XFS_ERROR(EIO);
1499 goto out_put_tmp_file;
1500 }
1501
1502 error = xfs_swap_extents(ip, tip, sxp);
1503
1504 out_put_tmp_file:
1505 fdput(tmp);
1506 out_put_file:
1507 fdput(f);
1508 out:
1509 return error;
1510}
1511
1512/*
1513 * Note: some of the ioctl's return positive numbers as a
1514 * byte count indicating success, such as readlink_by_handle.
1515 * So we don't "sign flip" like most other routines. This means
1516 * true errors need to be returned as a negative value.
1517 */
1518long
1519xfs_file_ioctl(
1520 struct file *filp,
1521 unsigned int cmd,
1522 unsigned long p)
1523{
1524 struct inode *inode = file_inode(filp);
1525 struct xfs_inode *ip = XFS_I(inode);
1526 struct xfs_mount *mp = ip->i_mount;
1527 void __user *arg = (void __user *)p;
1528 int ioflags = 0;
1529 int error;
1530
1531 if (filp->f_mode & FMODE_NOCMTIME)
1532 ioflags |= IO_INVIS;
1533
1534 trace_xfs_file_ioctl(ip);
1535
1536 switch (cmd) {
1537 case FITRIM:
1538 return xfs_ioc_trim(mp, arg);
1539 case XFS_IOC_ALLOCSP:
1540 case XFS_IOC_FREESP:
1541 case XFS_IOC_RESVSP:
1542 case XFS_IOC_UNRESVSP:
1543 case XFS_IOC_ALLOCSP64:
1544 case XFS_IOC_FREESP64:
1545 case XFS_IOC_RESVSP64:
1546 case XFS_IOC_UNRESVSP64:
1547 case XFS_IOC_ZERO_RANGE: {
1548 xfs_flock64_t bf;
1549
1550 if (copy_from_user(&bf, arg, sizeof(bf)))
1551 return -XFS_ERROR(EFAULT);
1552 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1553 }
1554 case XFS_IOC_DIOINFO: {
1555 struct dioattr da;
1556 xfs_buftarg_t *target =
1557 XFS_IS_REALTIME_INODE(ip) ?
1558 mp->m_rtdev_targp : mp->m_ddev_targp;
1559
1560 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1561 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1562
1563 if (copy_to_user(arg, &da, sizeof(da)))
1564 return -XFS_ERROR(EFAULT);
1565 return 0;
1566 }
1567
1568 case XFS_IOC_FSBULKSTAT_SINGLE:
1569 case XFS_IOC_FSBULKSTAT:
1570 case XFS_IOC_FSINUMBERS:
1571 return xfs_ioc_bulkstat(mp, cmd, arg);
1572
1573 case XFS_IOC_FSGEOMETRY_V1:
1574 return xfs_ioc_fsgeometry_v1(mp, arg);
1575
1576 case XFS_IOC_FSGEOMETRY:
1577 return xfs_ioc_fsgeometry(mp, arg);
1578
1579 case XFS_IOC_GETVERSION:
1580 return put_user(inode->i_generation, (int __user *)arg);
1581
1582 case XFS_IOC_FSGETXATTR:
1583 return xfs_ioc_fsgetxattr(ip, 0, arg);
1584 case XFS_IOC_FSGETXATTRA:
1585 return xfs_ioc_fsgetxattr(ip, 1, arg);
1586 case XFS_IOC_FSSETXATTR:
1587 return xfs_ioc_fssetxattr(ip, filp, arg);
1588 case XFS_IOC_GETXFLAGS:
1589 return xfs_ioc_getxflags(ip, arg);
1590 case XFS_IOC_SETXFLAGS:
1591 return xfs_ioc_setxflags(ip, filp, arg);
1592
1593 case XFS_IOC_FSSETDM: {
1594 struct fsdmidata dmi;
1595
1596 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1597 return -XFS_ERROR(EFAULT);
1598
1599 error = mnt_want_write_file(filp);
1600 if (error)
1601 return error;
1602
1603 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1604 dmi.fsd_dmstate);
1605 mnt_drop_write_file(filp);
1606 return -error;
1607 }
1608
1609 case XFS_IOC_GETBMAP:
1610 case XFS_IOC_GETBMAPA:
1611 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1612
1613 case XFS_IOC_GETBMAPX:
1614 return xfs_ioc_getbmapx(ip, arg);
1615
1616 case XFS_IOC_FD_TO_HANDLE:
1617 case XFS_IOC_PATH_TO_HANDLE:
1618 case XFS_IOC_PATH_TO_FSHANDLE: {
1619 xfs_fsop_handlereq_t hreq;
1620
1621 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1622 return -XFS_ERROR(EFAULT);
1623 return xfs_find_handle(cmd, &hreq);
1624 }
1625 case XFS_IOC_OPEN_BY_HANDLE: {
1626 xfs_fsop_handlereq_t hreq;
1627
1628 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1629 return -XFS_ERROR(EFAULT);
1630 return xfs_open_by_handle(filp, &hreq);
1631 }
1632 case XFS_IOC_FSSETDM_BY_HANDLE:
1633 return xfs_fssetdm_by_handle(filp, arg);
1634
1635 case XFS_IOC_READLINK_BY_HANDLE: {
1636 xfs_fsop_handlereq_t hreq;
1637
1638 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1639 return -XFS_ERROR(EFAULT);
1640 return xfs_readlink_by_handle(filp, &hreq);
1641 }
1642 case XFS_IOC_ATTRLIST_BY_HANDLE:
1643 return xfs_attrlist_by_handle(filp, arg);
1644
1645 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1646 return xfs_attrmulti_by_handle(filp, arg);
1647
1648 case XFS_IOC_SWAPEXT: {
1649 struct xfs_swapext sxp;
1650
1651 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1652 return -XFS_ERROR(EFAULT);
1653 error = mnt_want_write_file(filp);
1654 if (error)
1655 return error;
1656 error = xfs_ioc_swapext(&sxp);
1657 mnt_drop_write_file(filp);
1658 return -error;
1659 }
1660
1661 case XFS_IOC_FSCOUNTS: {
1662 xfs_fsop_counts_t out;
1663
1664 error = xfs_fs_counts(mp, &out);
1665 if (error)
1666 return -error;
1667
1668 if (copy_to_user(arg, &out, sizeof(out)))
1669 return -XFS_ERROR(EFAULT);
1670 return 0;
1671 }
1672
1673 case XFS_IOC_SET_RESBLKS: {
1674 xfs_fsop_resblks_t inout;
1675 __uint64_t in;
1676
1677 if (!capable(CAP_SYS_ADMIN))
1678 return -EPERM;
1679
1680 if (mp->m_flags & XFS_MOUNT_RDONLY)
1681 return -XFS_ERROR(EROFS);
1682
1683 if (copy_from_user(&inout, arg, sizeof(inout)))
1684 return -XFS_ERROR(EFAULT);
1685
1686 error = mnt_want_write_file(filp);
1687 if (error)
1688 return error;
1689
1690 /* input parameter is passed in resblks field of structure */
1691 in = inout.resblks;
1692 error = xfs_reserve_blocks(mp, &in, &inout);
1693 mnt_drop_write_file(filp);
1694 if (error)
1695 return -error;
1696
1697 if (copy_to_user(arg, &inout, sizeof(inout)))
1698 return -XFS_ERROR(EFAULT);
1699 return 0;
1700 }
1701
1702 case XFS_IOC_GET_RESBLKS: {
1703 xfs_fsop_resblks_t out;
1704
1705 if (!capable(CAP_SYS_ADMIN))
1706 return -EPERM;
1707
1708 error = xfs_reserve_blocks(mp, NULL, &out);
1709 if (error)
1710 return -error;
1711
1712 if (copy_to_user(arg, &out, sizeof(out)))
1713 return -XFS_ERROR(EFAULT);
1714
1715 return 0;
1716 }
1717
1718 case XFS_IOC_FSGROWFSDATA: {
1719 xfs_growfs_data_t in;
1720
1721 if (copy_from_user(&in, arg, sizeof(in)))
1722 return -XFS_ERROR(EFAULT);
1723
1724 error = mnt_want_write_file(filp);
1725 if (error)
1726 return error;
1727 error = xfs_growfs_data(mp, &in);
1728 mnt_drop_write_file(filp);
1729 return -error;
1730 }
1731
1732 case XFS_IOC_FSGROWFSLOG: {
1733 xfs_growfs_log_t in;
1734
1735 if (copy_from_user(&in, arg, sizeof(in)))
1736 return -XFS_ERROR(EFAULT);
1737
1738 error = mnt_want_write_file(filp);
1739 if (error)
1740 return error;
1741 error = xfs_growfs_log(mp, &in);
1742 mnt_drop_write_file(filp);
1743 return -error;
1744 }
1745
1746 case XFS_IOC_FSGROWFSRT: {
1747 xfs_growfs_rt_t in;
1748
1749 if (copy_from_user(&in, arg, sizeof(in)))
1750 return -XFS_ERROR(EFAULT);
1751
1752 error = mnt_want_write_file(filp);
1753 if (error)
1754 return error;
1755 error = xfs_growfs_rt(mp, &in);
1756 mnt_drop_write_file(filp);
1757 return -error;
1758 }
1759
1760 case XFS_IOC_GOINGDOWN: {
1761 __uint32_t in;
1762
1763 if (!capable(CAP_SYS_ADMIN))
1764 return -EPERM;
1765
1766 if (get_user(in, (__uint32_t __user *)arg))
1767 return -XFS_ERROR(EFAULT);
1768
1769 error = xfs_fs_goingdown(mp, in);
1770 return -error;
1771 }
1772
1773 case XFS_IOC_ERROR_INJECTION: {
1774 xfs_error_injection_t in;
1775
1776 if (!capable(CAP_SYS_ADMIN))
1777 return -EPERM;
1778
1779 if (copy_from_user(&in, arg, sizeof(in)))
1780 return -XFS_ERROR(EFAULT);
1781
1782 error = xfs_errortag_add(in.errtag, mp);
1783 return -error;
1784 }
1785
1786 case XFS_IOC_ERROR_CLEARALL:
1787 if (!capable(CAP_SYS_ADMIN))
1788 return -EPERM;
1789
1790 error = xfs_errortag_clearall(mp, 1);
1791 return -error;
1792
1793 case XFS_IOC_FREE_EOFBLOCKS: {
1794 struct xfs_fs_eofblocks eofb;
1795 struct xfs_eofblocks keofb;
1796
1797 if (!capable(CAP_SYS_ADMIN))
1798 return -EPERM;
1799
1800 if (mp->m_flags & XFS_MOUNT_RDONLY)
1801 return -XFS_ERROR(EROFS);
1802
1803 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1804 return -XFS_ERROR(EFAULT);
1805
1806 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1807 if (error)
1808 return -error;
1809
1810 return -xfs_icache_free_eofblocks(mp, &keofb);
1811 }
1812
1813 default:
1814 return -ENOTTY;
1815 }
1816}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_inode.h"
14#include "xfs_rtalloc.h"
15#include "xfs_iwalk.h"
16#include "xfs_itable.h"
17#include "xfs_error.h"
18#include "xfs_attr.h"
19#include "xfs_bmap.h"
20#include "xfs_bmap_util.h"
21#include "xfs_fsops.h"
22#include "xfs_discard.h"
23#include "xfs_quota.h"
24#include "xfs_export.h"
25#include "xfs_trace.h"
26#include "xfs_icache.h"
27#include "xfs_trans.h"
28#include "xfs_acl.h"
29#include "xfs_btree.h"
30#include <linux/fsmap.h>
31#include "xfs_fsmap.h"
32#include "scrub/xfs_scrub.h"
33#include "xfs_sb.h"
34#include "xfs_ag.h"
35#include "xfs_health.h"
36#include "xfs_reflink.h"
37#include "xfs_ioctl.h"
38#include "xfs_da_format.h"
39#include "xfs_da_btree.h"
40
41#include <linux/mount.h>
42#include <linux/namei.h>
43
44/*
45 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
46 * a file or fs handle.
47 *
48 * XFS_IOC_PATH_TO_FSHANDLE
49 * returns fs handle for a mount point or path within that mount point
50 * XFS_IOC_FD_TO_HANDLE
51 * returns full handle for a FD opened in user space
52 * XFS_IOC_PATH_TO_HANDLE
53 * returns full handle for a path
54 */
55int
56xfs_find_handle(
57 unsigned int cmd,
58 xfs_fsop_handlereq_t *hreq)
59{
60 int hsize;
61 xfs_handle_t handle;
62 struct inode *inode;
63 struct fd f = {NULL};
64 struct path path;
65 int error;
66 struct xfs_inode *ip;
67
68 if (cmd == XFS_IOC_FD_TO_HANDLE) {
69 f = fdget(hreq->fd);
70 if (!f.file)
71 return -EBADF;
72 inode = file_inode(f.file);
73 } else {
74 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
75 if (error)
76 return error;
77 inode = d_inode(path.dentry);
78 }
79 ip = XFS_I(inode);
80
81 /*
82 * We can only generate handles for inodes residing on a XFS filesystem,
83 * and only for regular files, directories or symbolic links.
84 */
85 error = -EINVAL;
86 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
87 goto out_put;
88
89 error = -EBADF;
90 if (!S_ISREG(inode->i_mode) &&
91 !S_ISDIR(inode->i_mode) &&
92 !S_ISLNK(inode->i_mode))
93 goto out_put;
94
95
96 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
97
98 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
99 /*
100 * This handle only contains an fsid, zero the rest.
101 */
102 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
103 hsize = sizeof(xfs_fsid_t);
104 } else {
105 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
106 sizeof(handle.ha_fid.fid_len);
107 handle.ha_fid.fid_pad = 0;
108 handle.ha_fid.fid_gen = inode->i_generation;
109 handle.ha_fid.fid_ino = ip->i_ino;
110 hsize = sizeof(xfs_handle_t);
111 }
112
113 error = -EFAULT;
114 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
115 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
116 goto out_put;
117
118 error = 0;
119
120 out_put:
121 if (cmd == XFS_IOC_FD_TO_HANDLE)
122 fdput(f);
123 else
124 path_put(&path);
125 return error;
126}
127
128/*
129 * No need to do permission checks on the various pathname components
130 * as the handle operations are privileged.
131 */
132STATIC int
133xfs_handle_acceptable(
134 void *context,
135 struct dentry *dentry)
136{
137 return 1;
138}
139
140/*
141 * Convert userspace handle data into a dentry.
142 */
143struct dentry *
144xfs_handle_to_dentry(
145 struct file *parfilp,
146 void __user *uhandle,
147 u32 hlen)
148{
149 xfs_handle_t handle;
150 struct xfs_fid64 fid;
151
152 /*
153 * Only allow handle opens under a directory.
154 */
155 if (!S_ISDIR(file_inode(parfilp)->i_mode))
156 return ERR_PTR(-ENOTDIR);
157
158 if (hlen != sizeof(xfs_handle_t))
159 return ERR_PTR(-EINVAL);
160 if (copy_from_user(&handle, uhandle, hlen))
161 return ERR_PTR(-EFAULT);
162 if (handle.ha_fid.fid_len !=
163 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
164 return ERR_PTR(-EINVAL);
165
166 memset(&fid, 0, sizeof(struct fid));
167 fid.ino = handle.ha_fid.fid_ino;
168 fid.gen = handle.ha_fid.fid_gen;
169
170 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
171 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
172 xfs_handle_acceptable, NULL);
173}
174
175STATIC struct dentry *
176xfs_handlereq_to_dentry(
177 struct file *parfilp,
178 xfs_fsop_handlereq_t *hreq)
179{
180 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
181}
182
183int
184xfs_open_by_handle(
185 struct file *parfilp,
186 xfs_fsop_handlereq_t *hreq)
187{
188 const struct cred *cred = current_cred();
189 int error;
190 int fd;
191 int permflag;
192 struct file *filp;
193 struct inode *inode;
194 struct dentry *dentry;
195 fmode_t fmode;
196 struct path path;
197
198 if (!capable(CAP_SYS_ADMIN))
199 return -EPERM;
200
201 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
202 if (IS_ERR(dentry))
203 return PTR_ERR(dentry);
204 inode = d_inode(dentry);
205
206 /* Restrict xfs_open_by_handle to directories & regular files. */
207 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
208 error = -EPERM;
209 goto out_dput;
210 }
211
212#if BITS_PER_LONG != 32
213 hreq->oflags |= O_LARGEFILE;
214#endif
215
216 permflag = hreq->oflags;
217 fmode = OPEN_FMODE(permflag);
218 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
219 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
220 error = -EPERM;
221 goto out_dput;
222 }
223
224 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
225 error = -EPERM;
226 goto out_dput;
227 }
228
229 /* Can't write directories. */
230 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
231 error = -EISDIR;
232 goto out_dput;
233 }
234
235 fd = get_unused_fd_flags(0);
236 if (fd < 0) {
237 error = fd;
238 goto out_dput;
239 }
240
241 path.mnt = parfilp->f_path.mnt;
242 path.dentry = dentry;
243 filp = dentry_open(&path, hreq->oflags, cred);
244 dput(dentry);
245 if (IS_ERR(filp)) {
246 put_unused_fd(fd);
247 return PTR_ERR(filp);
248 }
249
250 if (S_ISREG(inode->i_mode)) {
251 filp->f_flags |= O_NOATIME;
252 filp->f_mode |= FMODE_NOCMTIME;
253 }
254
255 fd_install(fd, filp);
256 return fd;
257
258 out_dput:
259 dput(dentry);
260 return error;
261}
262
263int
264xfs_readlink_by_handle(
265 struct file *parfilp,
266 xfs_fsop_handlereq_t *hreq)
267{
268 struct dentry *dentry;
269 __u32 olen;
270 int error;
271
272 if (!capable(CAP_SYS_ADMIN))
273 return -EPERM;
274
275 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
276 if (IS_ERR(dentry))
277 return PTR_ERR(dentry);
278
279 /* Restrict this handle operation to symlinks only. */
280 if (!d_is_symlink(dentry)) {
281 error = -EINVAL;
282 goto out_dput;
283 }
284
285 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
286 error = -EFAULT;
287 goto out_dput;
288 }
289
290 error = vfs_readlink(dentry, hreq->ohandle, olen);
291
292 out_dput:
293 dput(dentry);
294 return error;
295}
296
297/*
298 * Format an attribute and copy it out to the user's buffer.
299 * Take care to check values and protect against them changing later,
300 * we may be reading them directly out of a user buffer.
301 */
302static void
303xfs_ioc_attr_put_listent(
304 struct xfs_attr_list_context *context,
305 int flags,
306 unsigned char *name,
307 int namelen,
308 int valuelen)
309{
310 struct xfs_attrlist *alist = context->buffer;
311 struct xfs_attrlist_ent *aep;
312 int arraytop;
313
314 ASSERT(!context->seen_enough);
315 ASSERT(context->count >= 0);
316 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
317 ASSERT(context->firstu >= sizeof(*alist));
318 ASSERT(context->firstu <= context->bufsize);
319
320 /*
321 * Only list entries in the right namespace.
322 */
323 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
324 return;
325
326 arraytop = sizeof(*alist) +
327 context->count * sizeof(alist->al_offset[0]);
328
329 /* decrement by the actual bytes used by the attr */
330 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
331 namelen + 1, sizeof(uint32_t));
332 if (context->firstu < arraytop) {
333 trace_xfs_attr_list_full(context);
334 alist->al_more = 1;
335 context->seen_enough = 1;
336 return;
337 }
338
339 aep = context->buffer + context->firstu;
340 aep->a_valuelen = valuelen;
341 memcpy(aep->a_name, name, namelen);
342 aep->a_name[namelen] = 0;
343 alist->al_offset[context->count++] = context->firstu;
344 alist->al_count = context->count;
345 trace_xfs_attr_list_add(context);
346}
347
348static unsigned int
349xfs_attr_filter(
350 u32 ioc_flags)
351{
352 if (ioc_flags & XFS_IOC_ATTR_ROOT)
353 return XFS_ATTR_ROOT;
354 if (ioc_flags & XFS_IOC_ATTR_SECURE)
355 return XFS_ATTR_SECURE;
356 return 0;
357}
358
359static unsigned int
360xfs_attr_flags(
361 u32 ioc_flags)
362{
363 if (ioc_flags & XFS_IOC_ATTR_CREATE)
364 return XATTR_CREATE;
365 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
366 return XATTR_REPLACE;
367 return 0;
368}
369
370int
371xfs_ioc_attr_list(
372 struct xfs_inode *dp,
373 void __user *ubuf,
374 int bufsize,
375 int flags,
376 struct xfs_attrlist_cursor __user *ucursor)
377{
378 struct xfs_attr_list_context context = { };
379 struct xfs_attrlist *alist;
380 void *buffer;
381 int error;
382
383 if (bufsize < sizeof(struct xfs_attrlist) ||
384 bufsize > XFS_XATTR_LIST_MAX)
385 return -EINVAL;
386
387 /*
388 * Reject flags, only allow namespaces.
389 */
390 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
391 return -EINVAL;
392 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
393 return -EINVAL;
394
395 /*
396 * Validate the cursor.
397 */
398 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
399 return -EFAULT;
400 if (context.cursor.pad1 || context.cursor.pad2)
401 return -EINVAL;
402 if (!context.cursor.initted &&
403 (context.cursor.hashval || context.cursor.blkno ||
404 context.cursor.offset))
405 return -EINVAL;
406
407 buffer = kmem_zalloc_large(bufsize, 0);
408 if (!buffer)
409 return -ENOMEM;
410
411 /*
412 * Initialize the output buffer.
413 */
414 context.dp = dp;
415 context.resynch = 1;
416 context.attr_filter = xfs_attr_filter(flags);
417 context.buffer = buffer;
418 context.bufsize = round_down(bufsize, sizeof(uint32_t));
419 context.firstu = context.bufsize;
420 context.put_listent = xfs_ioc_attr_put_listent;
421
422 alist = context.buffer;
423 alist->al_count = 0;
424 alist->al_more = 0;
425 alist->al_offset[0] = context.bufsize;
426
427 error = xfs_attr_list(&context);
428 if (error)
429 goto out_free;
430
431 if (copy_to_user(ubuf, buffer, bufsize) ||
432 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
433 error = -EFAULT;
434out_free:
435 kmem_free(buffer);
436 return error;
437}
438
439STATIC int
440xfs_attrlist_by_handle(
441 struct file *parfilp,
442 struct xfs_fsop_attrlist_handlereq __user *p)
443{
444 struct xfs_fsop_attrlist_handlereq al_hreq;
445 struct dentry *dentry;
446 int error = -ENOMEM;
447
448 if (!capable(CAP_SYS_ADMIN))
449 return -EPERM;
450 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
451 return -EFAULT;
452
453 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
454 if (IS_ERR(dentry))
455 return PTR_ERR(dentry);
456
457 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
458 al_hreq.buflen, al_hreq.flags, &p->pos);
459 dput(dentry);
460 return error;
461}
462
463static int
464xfs_attrmulti_attr_get(
465 struct inode *inode,
466 unsigned char *name,
467 unsigned char __user *ubuf,
468 uint32_t *len,
469 uint32_t flags)
470{
471 struct xfs_da_args args = {
472 .dp = XFS_I(inode),
473 .attr_filter = xfs_attr_filter(flags),
474 .attr_flags = xfs_attr_flags(flags),
475 .name = name,
476 .namelen = strlen(name),
477 .valuelen = *len,
478 };
479 int error;
480
481 if (*len > XFS_XATTR_SIZE_MAX)
482 return -EINVAL;
483
484 error = xfs_attr_get(&args);
485 if (error)
486 goto out_kfree;
487
488 *len = args.valuelen;
489 if (copy_to_user(ubuf, args.value, args.valuelen))
490 error = -EFAULT;
491
492out_kfree:
493 kmem_free(args.value);
494 return error;
495}
496
497static int
498xfs_attrmulti_attr_set(
499 struct inode *inode,
500 unsigned char *name,
501 const unsigned char __user *ubuf,
502 uint32_t len,
503 uint32_t flags)
504{
505 struct xfs_da_args args = {
506 .dp = XFS_I(inode),
507 .attr_filter = xfs_attr_filter(flags),
508 .attr_flags = xfs_attr_flags(flags),
509 .name = name,
510 .namelen = strlen(name),
511 };
512 int error;
513
514 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
515 return -EPERM;
516
517 if (ubuf) {
518 if (len > XFS_XATTR_SIZE_MAX)
519 return -EINVAL;
520 args.value = memdup_user(ubuf, len);
521 if (IS_ERR(args.value))
522 return PTR_ERR(args.value);
523 args.valuelen = len;
524 }
525
526 error = xfs_attr_set(&args);
527 if (!error && (flags & XFS_IOC_ATTR_ROOT))
528 xfs_forget_acl(inode, name);
529 kfree(args.value);
530 return error;
531}
532
533int
534xfs_ioc_attrmulti_one(
535 struct file *parfilp,
536 struct inode *inode,
537 uint32_t opcode,
538 void __user *uname,
539 void __user *value,
540 uint32_t *len,
541 uint32_t flags)
542{
543 unsigned char *name;
544 int error;
545
546 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
547 return -EINVAL;
548
549 name = strndup_user(uname, MAXNAMELEN);
550 if (IS_ERR(name))
551 return PTR_ERR(name);
552
553 switch (opcode) {
554 case ATTR_OP_GET:
555 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
556 break;
557 case ATTR_OP_REMOVE:
558 value = NULL;
559 *len = 0;
560 /* fall through */
561 case ATTR_OP_SET:
562 error = mnt_want_write_file(parfilp);
563 if (error)
564 break;
565 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
566 mnt_drop_write_file(parfilp);
567 break;
568 default:
569 error = -EINVAL;
570 break;
571 }
572
573 kfree(name);
574 return error;
575}
576
577STATIC int
578xfs_attrmulti_by_handle(
579 struct file *parfilp,
580 void __user *arg)
581{
582 int error;
583 xfs_attr_multiop_t *ops;
584 xfs_fsop_attrmulti_handlereq_t am_hreq;
585 struct dentry *dentry;
586 unsigned int i, size;
587
588 if (!capable(CAP_SYS_ADMIN))
589 return -EPERM;
590 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
591 return -EFAULT;
592
593 /* overflow check */
594 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
595 return -E2BIG;
596
597 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
598 if (IS_ERR(dentry))
599 return PTR_ERR(dentry);
600
601 error = -E2BIG;
602 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
603 if (!size || size > 16 * PAGE_SIZE)
604 goto out_dput;
605
606 ops = memdup_user(am_hreq.ops, size);
607 if (IS_ERR(ops)) {
608 error = PTR_ERR(ops);
609 goto out_dput;
610 }
611
612 error = 0;
613 for (i = 0; i < am_hreq.opcount; i++) {
614 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
615 d_inode(dentry), ops[i].am_opcode,
616 ops[i].am_attrname, ops[i].am_attrvalue,
617 &ops[i].am_length, ops[i].am_flags);
618 }
619
620 if (copy_to_user(am_hreq.ops, ops, size))
621 error = -EFAULT;
622
623 kfree(ops);
624 out_dput:
625 dput(dentry);
626 return error;
627}
628
629int
630xfs_ioc_space(
631 struct file *filp,
632 xfs_flock64_t *bf)
633{
634 struct inode *inode = file_inode(filp);
635 struct xfs_inode *ip = XFS_I(inode);
636 struct iattr iattr;
637 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR;
638 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
639 int error;
640
641 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
642 return -EPERM;
643
644 if (!(filp->f_mode & FMODE_WRITE))
645 return -EBADF;
646
647 if (!S_ISREG(inode->i_mode))
648 return -EINVAL;
649
650 if (xfs_is_always_cow_inode(ip))
651 return -EOPNOTSUPP;
652
653 if (filp->f_flags & O_DSYNC)
654 flags |= XFS_PREALLOC_SYNC;
655 if (filp->f_mode & FMODE_NOCMTIME)
656 flags |= XFS_PREALLOC_INVISIBLE;
657
658 error = mnt_want_write_file(filp);
659 if (error)
660 return error;
661
662 xfs_ilock(ip, iolock);
663 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
664 if (error)
665 goto out_unlock;
666 inode_dio_wait(inode);
667
668 switch (bf->l_whence) {
669 case 0: /*SEEK_SET*/
670 break;
671 case 1: /*SEEK_CUR*/
672 bf->l_start += filp->f_pos;
673 break;
674 case 2: /*SEEK_END*/
675 bf->l_start += XFS_ISIZE(ip);
676 break;
677 default:
678 error = -EINVAL;
679 goto out_unlock;
680 }
681
682 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) {
683 error = -EINVAL;
684 goto out_unlock;
685 }
686
687 if (bf->l_start > XFS_ISIZE(ip)) {
688 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
689 bf->l_start - XFS_ISIZE(ip), 0);
690 if (error)
691 goto out_unlock;
692 }
693
694 iattr.ia_valid = ATTR_SIZE;
695 iattr.ia_size = bf->l_start;
696 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
697 if (error)
698 goto out_unlock;
699
700 error = xfs_update_prealloc_flags(ip, flags);
701
702out_unlock:
703 xfs_iunlock(ip, iolock);
704 mnt_drop_write_file(filp);
705 return error;
706}
707
708/* Return 0 on success or positive error */
709int
710xfs_fsbulkstat_one_fmt(
711 struct xfs_ibulk *breq,
712 const struct xfs_bulkstat *bstat)
713{
714 struct xfs_bstat bs1;
715
716 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
717 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
718 return -EFAULT;
719 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
720}
721
722int
723xfs_fsinumbers_fmt(
724 struct xfs_ibulk *breq,
725 const struct xfs_inumbers *igrp)
726{
727 struct xfs_inogrp ig1;
728
729 xfs_inumbers_to_inogrp(&ig1, igrp);
730 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
731 return -EFAULT;
732 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
733}
734
735STATIC int
736xfs_ioc_fsbulkstat(
737 xfs_mount_t *mp,
738 unsigned int cmd,
739 void __user *arg)
740{
741 struct xfs_fsop_bulkreq bulkreq;
742 struct xfs_ibulk breq = {
743 .mp = mp,
744 .ocount = 0,
745 };
746 xfs_ino_t lastino;
747 int error;
748
749 /* done = 1 if there are more stats to get and if bulkstat */
750 /* should be called again (unused here, but used in dmapi) */
751
752 if (!capable(CAP_SYS_ADMIN))
753 return -EPERM;
754
755 if (XFS_FORCED_SHUTDOWN(mp))
756 return -EIO;
757
758 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
759 return -EFAULT;
760
761 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
762 return -EFAULT;
763
764 if (bulkreq.icount <= 0)
765 return -EINVAL;
766
767 if (bulkreq.ubuffer == NULL)
768 return -EINVAL;
769
770 breq.ubuffer = bulkreq.ubuffer;
771 breq.icount = bulkreq.icount;
772
773 /*
774 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
775 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
776 * that *lastip contains either zero or the number of the last inode to
777 * be examined by the previous call and return results starting with
778 * the next inode after that. The new bulk request back end functions
779 * take the inode to start with, so we have to compute the startino
780 * parameter from lastino to maintain correct function. lastino == 0
781 * is a special case because it has traditionally meant "first inode
782 * in filesystem".
783 */
784 if (cmd == XFS_IOC_FSINUMBERS) {
785 breq.startino = lastino ? lastino + 1 : 0;
786 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
787 lastino = breq.startino - 1;
788 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
789 breq.startino = lastino;
790 breq.icount = 1;
791 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
792 } else { /* XFS_IOC_FSBULKSTAT */
793 breq.startino = lastino ? lastino + 1 : 0;
794 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
795 lastino = breq.startino - 1;
796 }
797
798 if (error)
799 return error;
800
801 if (bulkreq.lastip != NULL &&
802 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
803 return -EFAULT;
804
805 if (bulkreq.ocount != NULL &&
806 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
807 return -EFAULT;
808
809 return 0;
810}
811
812/* Return 0 on success or positive error */
813static int
814xfs_bulkstat_fmt(
815 struct xfs_ibulk *breq,
816 const struct xfs_bulkstat *bstat)
817{
818 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
819 return -EFAULT;
820 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
821}
822
823/*
824 * Check the incoming bulk request @hdr from userspace and initialize the
825 * internal @breq bulk request appropriately. Returns 0 if the bulk request
826 * should proceed; -ECANCELED if there's nothing to do; or the usual
827 * negative error code.
828 */
829static int
830xfs_bulk_ireq_setup(
831 struct xfs_mount *mp,
832 struct xfs_bulk_ireq *hdr,
833 struct xfs_ibulk *breq,
834 void __user *ubuffer)
835{
836 if (hdr->icount == 0 ||
837 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
838 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
839 return -EINVAL;
840
841 breq->startino = hdr->ino;
842 breq->ubuffer = ubuffer;
843 breq->icount = hdr->icount;
844 breq->ocount = 0;
845 breq->flags = 0;
846
847 /*
848 * The @ino parameter is a special value, so we must look it up here.
849 * We're not allowed to have IREQ_AGNO, and we only return one inode
850 * worth of data.
851 */
852 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
853 if (hdr->flags & XFS_BULK_IREQ_AGNO)
854 return -EINVAL;
855
856 switch (hdr->ino) {
857 case XFS_BULK_IREQ_SPECIAL_ROOT:
858 hdr->ino = mp->m_sb.sb_rootino;
859 break;
860 default:
861 return -EINVAL;
862 }
863 breq->icount = 1;
864 }
865
866 /*
867 * The IREQ_AGNO flag means that we only want results from a given AG.
868 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
869 * beyond the specified AG then we return no results.
870 */
871 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
872 if (hdr->agno >= mp->m_sb.sb_agcount)
873 return -EINVAL;
874
875 if (breq->startino == 0)
876 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
877 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
878 return -EINVAL;
879
880 breq->flags |= XFS_IBULK_SAME_AG;
881
882 /* Asking for an inode past the end of the AG? We're done! */
883 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
884 return -ECANCELED;
885 } else if (hdr->agno)
886 return -EINVAL;
887
888 /* Asking for an inode past the end of the FS? We're done! */
889 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
890 return -ECANCELED;
891
892 return 0;
893}
894
895/*
896 * Update the userspace bulk request @hdr to reflect the end state of the
897 * internal bulk request @breq.
898 */
899static void
900xfs_bulk_ireq_teardown(
901 struct xfs_bulk_ireq *hdr,
902 struct xfs_ibulk *breq)
903{
904 hdr->ino = breq->startino;
905 hdr->ocount = breq->ocount;
906}
907
908/* Handle the v5 bulkstat ioctl. */
909STATIC int
910xfs_ioc_bulkstat(
911 struct xfs_mount *mp,
912 unsigned int cmd,
913 struct xfs_bulkstat_req __user *arg)
914{
915 struct xfs_bulk_ireq hdr;
916 struct xfs_ibulk breq = {
917 .mp = mp,
918 };
919 int error;
920
921 if (!capable(CAP_SYS_ADMIN))
922 return -EPERM;
923
924 if (XFS_FORCED_SHUTDOWN(mp))
925 return -EIO;
926
927 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
928 return -EFAULT;
929
930 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
931 if (error == -ECANCELED)
932 goto out_teardown;
933 if (error < 0)
934 return error;
935
936 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
937 if (error)
938 return error;
939
940out_teardown:
941 xfs_bulk_ireq_teardown(&hdr, &breq);
942 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
943 return -EFAULT;
944
945 return 0;
946}
947
948STATIC int
949xfs_inumbers_fmt(
950 struct xfs_ibulk *breq,
951 const struct xfs_inumbers *igrp)
952{
953 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
954 return -EFAULT;
955 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
956}
957
958/* Handle the v5 inumbers ioctl. */
959STATIC int
960xfs_ioc_inumbers(
961 struct xfs_mount *mp,
962 unsigned int cmd,
963 struct xfs_inumbers_req __user *arg)
964{
965 struct xfs_bulk_ireq hdr;
966 struct xfs_ibulk breq = {
967 .mp = mp,
968 };
969 int error;
970
971 if (!capable(CAP_SYS_ADMIN))
972 return -EPERM;
973
974 if (XFS_FORCED_SHUTDOWN(mp))
975 return -EIO;
976
977 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
978 return -EFAULT;
979
980 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
981 if (error == -ECANCELED)
982 goto out_teardown;
983 if (error < 0)
984 return error;
985
986 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
987 if (error)
988 return error;
989
990out_teardown:
991 xfs_bulk_ireq_teardown(&hdr, &breq);
992 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
993 return -EFAULT;
994
995 return 0;
996}
997
998STATIC int
999xfs_ioc_fsgeometry(
1000 struct xfs_mount *mp,
1001 void __user *arg,
1002 int struct_version)
1003{
1004 struct xfs_fsop_geom fsgeo;
1005 size_t len;
1006
1007 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version);
1008
1009 if (struct_version <= 3)
1010 len = sizeof(struct xfs_fsop_geom_v1);
1011 else if (struct_version == 4)
1012 len = sizeof(struct xfs_fsop_geom_v4);
1013 else {
1014 xfs_fsop_geom_health(mp, &fsgeo);
1015 len = sizeof(fsgeo);
1016 }
1017
1018 if (copy_to_user(arg, &fsgeo, len))
1019 return -EFAULT;
1020 return 0;
1021}
1022
1023STATIC int
1024xfs_ioc_ag_geometry(
1025 struct xfs_mount *mp,
1026 void __user *arg)
1027{
1028 struct xfs_ag_geometry ageo;
1029 int error;
1030
1031 if (copy_from_user(&ageo, arg, sizeof(ageo)))
1032 return -EFAULT;
1033 if (ageo.ag_flags)
1034 return -EINVAL;
1035 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
1036 return -EINVAL;
1037
1038 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1039 if (error)
1040 return error;
1041
1042 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1043 return -EFAULT;
1044 return 0;
1045}
1046
1047/*
1048 * Linux extended inode flags interface.
1049 */
1050
1051STATIC unsigned int
1052xfs_merge_ioc_xflags(
1053 unsigned int flags,
1054 unsigned int start)
1055{
1056 unsigned int xflags = start;
1057
1058 if (flags & FS_IMMUTABLE_FL)
1059 xflags |= FS_XFLAG_IMMUTABLE;
1060 else
1061 xflags &= ~FS_XFLAG_IMMUTABLE;
1062 if (flags & FS_APPEND_FL)
1063 xflags |= FS_XFLAG_APPEND;
1064 else
1065 xflags &= ~FS_XFLAG_APPEND;
1066 if (flags & FS_SYNC_FL)
1067 xflags |= FS_XFLAG_SYNC;
1068 else
1069 xflags &= ~FS_XFLAG_SYNC;
1070 if (flags & FS_NOATIME_FL)
1071 xflags |= FS_XFLAG_NOATIME;
1072 else
1073 xflags &= ~FS_XFLAG_NOATIME;
1074 if (flags & FS_NODUMP_FL)
1075 xflags |= FS_XFLAG_NODUMP;
1076 else
1077 xflags &= ~FS_XFLAG_NODUMP;
1078 if (flags & FS_DAX_FL)
1079 xflags |= FS_XFLAG_DAX;
1080 else
1081 xflags &= ~FS_XFLAG_DAX;
1082
1083 return xflags;
1084}
1085
1086STATIC unsigned int
1087xfs_di2lxflags(
1088 uint16_t di_flags,
1089 uint64_t di_flags2)
1090{
1091 unsigned int flags = 0;
1092
1093 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1094 flags |= FS_IMMUTABLE_FL;
1095 if (di_flags & XFS_DIFLAG_APPEND)
1096 flags |= FS_APPEND_FL;
1097 if (di_flags & XFS_DIFLAG_SYNC)
1098 flags |= FS_SYNC_FL;
1099 if (di_flags & XFS_DIFLAG_NOATIME)
1100 flags |= FS_NOATIME_FL;
1101 if (di_flags & XFS_DIFLAG_NODUMP)
1102 flags |= FS_NODUMP_FL;
1103 if (di_flags2 & XFS_DIFLAG2_DAX) {
1104 flags |= FS_DAX_FL;
1105 }
1106 return flags;
1107}
1108
1109static void
1110xfs_fill_fsxattr(
1111 struct xfs_inode *ip,
1112 bool attr,
1113 struct fsxattr *fa)
1114{
1115 struct xfs_ifork *ifp = attr ? ip->i_afp : &ip->i_df;
1116
1117 simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
1118 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
1119 fa->fsx_cowextsize = ip->i_d.di_cowextsize <<
1120 ip->i_mount->m_sb.sb_blocklog;
1121 fa->fsx_projid = ip->i_d.di_projid;
1122 if (ifp && (ifp->if_flags & XFS_IFEXTENTS))
1123 fa->fsx_nextents = xfs_iext_count(ifp);
1124 else
1125 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1126}
1127
1128STATIC int
1129xfs_ioc_fsgetxattr(
1130 xfs_inode_t *ip,
1131 int attr,
1132 void __user *arg)
1133{
1134 struct fsxattr fa;
1135
1136 xfs_ilock(ip, XFS_ILOCK_SHARED);
1137 xfs_fill_fsxattr(ip, attr, &fa);
1138 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1139
1140 if (copy_to_user(arg, &fa, sizeof(fa)))
1141 return -EFAULT;
1142 return 0;
1143}
1144
1145STATIC uint16_t
1146xfs_flags2diflags(
1147 struct xfs_inode *ip,
1148 unsigned int xflags)
1149{
1150 /* can't set PREALLOC this way, just preserve it */
1151 uint16_t di_flags =
1152 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
1153
1154 if (xflags & FS_XFLAG_IMMUTABLE)
1155 di_flags |= XFS_DIFLAG_IMMUTABLE;
1156 if (xflags & FS_XFLAG_APPEND)
1157 di_flags |= XFS_DIFLAG_APPEND;
1158 if (xflags & FS_XFLAG_SYNC)
1159 di_flags |= XFS_DIFLAG_SYNC;
1160 if (xflags & FS_XFLAG_NOATIME)
1161 di_flags |= XFS_DIFLAG_NOATIME;
1162 if (xflags & FS_XFLAG_NODUMP)
1163 di_flags |= XFS_DIFLAG_NODUMP;
1164 if (xflags & FS_XFLAG_NODEFRAG)
1165 di_flags |= XFS_DIFLAG_NODEFRAG;
1166 if (xflags & FS_XFLAG_FILESTREAM)
1167 di_flags |= XFS_DIFLAG_FILESTREAM;
1168 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1169 if (xflags & FS_XFLAG_RTINHERIT)
1170 di_flags |= XFS_DIFLAG_RTINHERIT;
1171 if (xflags & FS_XFLAG_NOSYMLINKS)
1172 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1173 if (xflags & FS_XFLAG_EXTSZINHERIT)
1174 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1175 if (xflags & FS_XFLAG_PROJINHERIT)
1176 di_flags |= XFS_DIFLAG_PROJINHERIT;
1177 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1178 if (xflags & FS_XFLAG_REALTIME)
1179 di_flags |= XFS_DIFLAG_REALTIME;
1180 if (xflags & FS_XFLAG_EXTSIZE)
1181 di_flags |= XFS_DIFLAG_EXTSIZE;
1182 }
1183
1184 return di_flags;
1185}
1186
1187STATIC uint64_t
1188xfs_flags2diflags2(
1189 struct xfs_inode *ip,
1190 unsigned int xflags)
1191{
1192 uint64_t di_flags2 =
1193 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
1194
1195 if (xflags & FS_XFLAG_DAX)
1196 di_flags2 |= XFS_DIFLAG2_DAX;
1197 if (xflags & FS_XFLAG_COWEXTSIZE)
1198 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1199
1200 return di_flags2;
1201}
1202
1203static int
1204xfs_ioctl_setattr_xflags(
1205 struct xfs_trans *tp,
1206 struct xfs_inode *ip,
1207 struct fsxattr *fa)
1208{
1209 struct xfs_mount *mp = ip->i_mount;
1210 uint64_t di_flags2;
1211
1212 /* Can't change realtime flag if any extents are allocated. */
1213 if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
1214 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1215 return -EINVAL;
1216
1217 /* If realtime flag is set then must have realtime device */
1218 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1219 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1220 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1221 return -EINVAL;
1222 }
1223
1224 /* Clear reflink if we are actually able to set the rt flag. */
1225 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1226 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1227
1228 /* Don't allow us to set DAX mode for a reflinked file for now. */
1229 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1230 return -EINVAL;
1231
1232 /* diflags2 only valid for v3 inodes. */
1233 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1234 if (di_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb))
1235 return -EINVAL;
1236
1237 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1238 ip->i_d.di_flags2 = di_flags2;
1239
1240 xfs_diflags_to_iflags(ip, false);
1241 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1242 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1243 XFS_STATS_INC(mp, xs_ig_attrchg);
1244 return 0;
1245}
1246
1247static void
1248xfs_ioctl_setattr_prepare_dax(
1249 struct xfs_inode *ip,
1250 struct fsxattr *fa)
1251{
1252 struct xfs_mount *mp = ip->i_mount;
1253 struct inode *inode = VFS_I(ip);
1254
1255 if (S_ISDIR(inode->i_mode))
1256 return;
1257
1258 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) ||
1259 (mp->m_flags & XFS_MOUNT_DAX_NEVER))
1260 return;
1261
1262 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1263 !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) ||
1264 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1265 (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)))
1266 d_mark_dontcache(inode);
1267}
1268
1269/*
1270 * Set up the transaction structure for the setattr operation, checking that we
1271 * have permission to do so. On success, return a clean transaction and the
1272 * inode locked exclusively ready for further operation specific checks. On
1273 * failure, return an error without modifying or locking the inode.
1274 */
1275static struct xfs_trans *
1276xfs_ioctl_setattr_get_trans(
1277 struct xfs_inode *ip)
1278{
1279 struct xfs_mount *mp = ip->i_mount;
1280 struct xfs_trans *tp;
1281 int error = -EROFS;
1282
1283 if (mp->m_flags & XFS_MOUNT_RDONLY)
1284 goto out_unlock;
1285 error = -EIO;
1286 if (XFS_FORCED_SHUTDOWN(mp))
1287 goto out_unlock;
1288
1289 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1290 if (error)
1291 goto out_unlock;
1292
1293 xfs_ilock(ip, XFS_ILOCK_EXCL);
1294 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1295
1296 /*
1297 * CAP_FOWNER overrides the following restrictions:
1298 *
1299 * The user ID of the calling process must be equal to the file owner
1300 * ID, except in cases where the CAP_FSETID capability is applicable.
1301 */
1302 if (!inode_owner_or_capable(VFS_I(ip))) {
1303 error = -EPERM;
1304 goto out_cancel;
1305 }
1306
1307 if (mp->m_flags & XFS_MOUNT_WSYNC)
1308 xfs_trans_set_sync(tp);
1309
1310 return tp;
1311
1312out_cancel:
1313 xfs_trans_cancel(tp);
1314out_unlock:
1315 return ERR_PTR(error);
1316}
1317
1318/*
1319 * extent size hint validation is somewhat cumbersome. Rules are:
1320 *
1321 * 1. extent size hint is only valid for directories and regular files
1322 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1323 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1324 * 4. can only be changed on regular files if no extents are allocated
1325 * 5. can be changed on directories at any time
1326 * 6. extsize hint of 0 turns off hints, clears inode flags.
1327 * 7. Extent size must be a multiple of the appropriate block size.
1328 * 8. for non-realtime files, the extent size hint must be limited
1329 * to half the AG size to avoid alignment extending the extent beyond the
1330 * limits of the AG.
1331 *
1332 * Please keep this function in sync with xfs_scrub_inode_extsize.
1333 */
1334static int
1335xfs_ioctl_setattr_check_extsize(
1336 struct xfs_inode *ip,
1337 struct fsxattr *fa)
1338{
1339 struct xfs_mount *mp = ip->i_mount;
1340 xfs_extlen_t size;
1341 xfs_fsblock_t extsize_fsb;
1342
1343 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1344 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1345 return -EINVAL;
1346
1347 if (fa->fsx_extsize == 0)
1348 return 0;
1349
1350 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1351 if (extsize_fsb > MAXEXTLEN)
1352 return -EINVAL;
1353
1354 if (XFS_IS_REALTIME_INODE(ip) ||
1355 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1356 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1357 } else {
1358 size = mp->m_sb.sb_blocksize;
1359 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1360 return -EINVAL;
1361 }
1362
1363 if (fa->fsx_extsize % size)
1364 return -EINVAL;
1365
1366 return 0;
1367}
1368
1369/*
1370 * CoW extent size hint validation rules are:
1371 *
1372 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1373 * The inode does not have to have any shared blocks, but it must be a v3.
1374 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1375 * for a directory, the hint is propagated to new files.
1376 * 3. Can be changed on files & directories at any time.
1377 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1378 * 5. Extent size must be a multiple of the appropriate block size.
1379 * 6. The extent size hint must be limited to half the AG size to avoid
1380 * alignment extending the extent beyond the limits of the AG.
1381 *
1382 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1383 */
1384static int
1385xfs_ioctl_setattr_check_cowextsize(
1386 struct xfs_inode *ip,
1387 struct fsxattr *fa)
1388{
1389 struct xfs_mount *mp = ip->i_mount;
1390 xfs_extlen_t size;
1391 xfs_fsblock_t cowextsize_fsb;
1392
1393 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1394 return 0;
1395
1396 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb))
1397 return -EINVAL;
1398
1399 if (fa->fsx_cowextsize == 0)
1400 return 0;
1401
1402 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1403 if (cowextsize_fsb > MAXEXTLEN)
1404 return -EINVAL;
1405
1406 size = mp->m_sb.sb_blocksize;
1407 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1408 return -EINVAL;
1409
1410 if (fa->fsx_cowextsize % size)
1411 return -EINVAL;
1412
1413 return 0;
1414}
1415
1416static int
1417xfs_ioctl_setattr_check_projid(
1418 struct xfs_inode *ip,
1419 struct fsxattr *fa)
1420{
1421 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1422 if (fa->fsx_projid > (uint16_t)-1 &&
1423 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1424 return -EINVAL;
1425 return 0;
1426}
1427
1428STATIC int
1429xfs_ioctl_setattr(
1430 xfs_inode_t *ip,
1431 struct fsxattr *fa)
1432{
1433 struct fsxattr old_fa;
1434 struct xfs_mount *mp = ip->i_mount;
1435 struct xfs_trans *tp;
1436 struct xfs_dquot *pdqp = NULL;
1437 struct xfs_dquot *olddquot = NULL;
1438 int code;
1439
1440 trace_xfs_ioctl_setattr(ip);
1441
1442 code = xfs_ioctl_setattr_check_projid(ip, fa);
1443 if (code)
1444 return code;
1445
1446 /*
1447 * If disk quotas is on, we make sure that the dquots do exist on disk,
1448 * before we start any other transactions. Trying to do this later
1449 * is messy. We don't care to take a readlock to look at the ids
1450 * in inode here, because we can't hold it across the trans_reserve.
1451 * If the IDs do change before we take the ilock, we're covered
1452 * because the i_*dquot fields will get updated anyway.
1453 */
1454 if (XFS_IS_QUOTA_ON(mp)) {
1455 code = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1456 VFS_I(ip)->i_gid, fa->fsx_projid,
1457 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1458 if (code)
1459 return code;
1460 }
1461
1462 xfs_ioctl_setattr_prepare_dax(ip, fa);
1463
1464 tp = xfs_ioctl_setattr_get_trans(ip);
1465 if (IS_ERR(tp)) {
1466 code = PTR_ERR(tp);
1467 goto error_free_dquots;
1468 }
1469
1470 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1471 ip->i_d.di_projid != fa->fsx_projid) {
1472 code = xfs_qm_vop_chown_reserve(tp, ip, NULL, NULL, pdqp,
1473 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1474 if (code) /* out of quota */
1475 goto error_trans_cancel;
1476 }
1477
1478 xfs_fill_fsxattr(ip, false, &old_fa);
1479 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa);
1480 if (code)
1481 goto error_trans_cancel;
1482
1483 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1484 if (code)
1485 goto error_trans_cancel;
1486
1487 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1488 if (code)
1489 goto error_trans_cancel;
1490
1491 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1492 if (code)
1493 goto error_trans_cancel;
1494
1495 /*
1496 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1497 * overrides the following restrictions:
1498 *
1499 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1500 * successful return from chown()
1501 */
1502
1503 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1504 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1505 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1506
1507 /* Change the ownerships and register project quota modifications */
1508 if (ip->i_d.di_projid != fa->fsx_projid) {
1509 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1510 olddquot = xfs_qm_vop_chown(tp, ip,
1511 &ip->i_pdquot, pdqp);
1512 }
1513 ip->i_d.di_projid = fa->fsx_projid;
1514 }
1515
1516 /*
1517 * Only set the extent size hint if we've already determined that the
1518 * extent size hint should be set on the inode. If no extent size flags
1519 * are set on the inode then unconditionally clear the extent size hint.
1520 */
1521 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1522 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1523 else
1524 ip->i_d.di_extsize = 0;
1525 if (xfs_sb_version_has_v3inode(&mp->m_sb) &&
1526 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1527 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1528 mp->m_sb.sb_blocklog;
1529 else
1530 ip->i_d.di_cowextsize = 0;
1531
1532 code = xfs_trans_commit(tp);
1533
1534 /*
1535 * Release any dquot(s) the inode had kept before chown.
1536 */
1537 xfs_qm_dqrele(olddquot);
1538 xfs_qm_dqrele(pdqp);
1539
1540 return code;
1541
1542error_trans_cancel:
1543 xfs_trans_cancel(tp);
1544error_free_dquots:
1545 xfs_qm_dqrele(pdqp);
1546 return code;
1547}
1548
1549STATIC int
1550xfs_ioc_fssetxattr(
1551 xfs_inode_t *ip,
1552 struct file *filp,
1553 void __user *arg)
1554{
1555 struct fsxattr fa;
1556 int error;
1557
1558 if (copy_from_user(&fa, arg, sizeof(fa)))
1559 return -EFAULT;
1560
1561 error = mnt_want_write_file(filp);
1562 if (error)
1563 return error;
1564 error = xfs_ioctl_setattr(ip, &fa);
1565 mnt_drop_write_file(filp);
1566 return error;
1567}
1568
1569STATIC int
1570xfs_ioc_getxflags(
1571 xfs_inode_t *ip,
1572 void __user *arg)
1573{
1574 unsigned int flags;
1575
1576 flags = xfs_di2lxflags(ip->i_d.di_flags, ip->i_d.di_flags2);
1577 if (copy_to_user(arg, &flags, sizeof(flags)))
1578 return -EFAULT;
1579 return 0;
1580}
1581
1582STATIC int
1583xfs_ioc_setxflags(
1584 struct xfs_inode *ip,
1585 struct file *filp,
1586 void __user *arg)
1587{
1588 struct xfs_trans *tp;
1589 struct fsxattr fa;
1590 struct fsxattr old_fa;
1591 unsigned int flags;
1592 int error;
1593
1594 if (copy_from_user(&flags, arg, sizeof(flags)))
1595 return -EFAULT;
1596
1597 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1598 FS_NOATIME_FL | FS_NODUMP_FL | \
1599 FS_SYNC_FL | FS_DAX_FL))
1600 return -EOPNOTSUPP;
1601
1602 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1603
1604 error = mnt_want_write_file(filp);
1605 if (error)
1606 return error;
1607
1608 xfs_ioctl_setattr_prepare_dax(ip, &fa);
1609
1610 tp = xfs_ioctl_setattr_get_trans(ip);
1611 if (IS_ERR(tp)) {
1612 error = PTR_ERR(tp);
1613 goto out_drop_write;
1614 }
1615
1616 xfs_fill_fsxattr(ip, false, &old_fa);
1617 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa);
1618 if (error) {
1619 xfs_trans_cancel(tp);
1620 goto out_drop_write;
1621 }
1622
1623 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1624 if (error) {
1625 xfs_trans_cancel(tp);
1626 goto out_drop_write;
1627 }
1628
1629 error = xfs_trans_commit(tp);
1630out_drop_write:
1631 mnt_drop_write_file(filp);
1632 return error;
1633}
1634
1635static bool
1636xfs_getbmap_format(
1637 struct kgetbmap *p,
1638 struct getbmapx __user *u,
1639 size_t recsize)
1640{
1641 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1642 put_user(p->bmv_block, &u->bmv_block) ||
1643 put_user(p->bmv_length, &u->bmv_length) ||
1644 put_user(0, &u->bmv_count) ||
1645 put_user(0, &u->bmv_entries))
1646 return false;
1647 if (recsize < sizeof(struct getbmapx))
1648 return true;
1649 if (put_user(0, &u->bmv_iflags) ||
1650 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1651 put_user(0, &u->bmv_unused1) ||
1652 put_user(0, &u->bmv_unused2))
1653 return false;
1654 return true;
1655}
1656
1657STATIC int
1658xfs_ioc_getbmap(
1659 struct file *file,
1660 unsigned int cmd,
1661 void __user *arg)
1662{
1663 struct getbmapx bmx = { 0 };
1664 struct kgetbmap *buf;
1665 size_t recsize;
1666 int error, i;
1667
1668 switch (cmd) {
1669 case XFS_IOC_GETBMAPA:
1670 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1671 /*FALLTHRU*/
1672 case XFS_IOC_GETBMAP:
1673 if (file->f_mode & FMODE_NOCMTIME)
1674 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1675 /* struct getbmap is a strict subset of struct getbmapx. */
1676 recsize = sizeof(struct getbmap);
1677 break;
1678 case XFS_IOC_GETBMAPX:
1679 recsize = sizeof(struct getbmapx);
1680 break;
1681 default:
1682 return -EINVAL;
1683 }
1684
1685 if (copy_from_user(&bmx, arg, recsize))
1686 return -EFAULT;
1687
1688 if (bmx.bmv_count < 2)
1689 return -EINVAL;
1690 if (bmx.bmv_count > ULONG_MAX / recsize)
1691 return -ENOMEM;
1692
1693 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1694 if (!buf)
1695 return -ENOMEM;
1696
1697 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1698 if (error)
1699 goto out_free_buf;
1700
1701 error = -EFAULT;
1702 if (copy_to_user(arg, &bmx, recsize))
1703 goto out_free_buf;
1704 arg += recsize;
1705
1706 for (i = 0; i < bmx.bmv_entries; i++) {
1707 if (!xfs_getbmap_format(buf + i, arg, recsize))
1708 goto out_free_buf;
1709 arg += recsize;
1710 }
1711
1712 error = 0;
1713out_free_buf:
1714 kmem_free(buf);
1715 return error;
1716}
1717
1718struct getfsmap_info {
1719 struct xfs_mount *mp;
1720 struct fsmap_head __user *data;
1721 unsigned int idx;
1722 __u32 last_flags;
1723};
1724
1725STATIC int
1726xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1727{
1728 struct getfsmap_info *info = priv;
1729 struct fsmap fm;
1730
1731 trace_xfs_getfsmap_mapping(info->mp, xfm);
1732
1733 info->last_flags = xfm->fmr_flags;
1734 xfs_fsmap_from_internal(&fm, xfm);
1735 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1736 sizeof(struct fsmap)))
1737 return -EFAULT;
1738
1739 return 0;
1740}
1741
1742STATIC int
1743xfs_ioc_getfsmap(
1744 struct xfs_inode *ip,
1745 struct fsmap_head __user *arg)
1746{
1747 struct getfsmap_info info = { NULL };
1748 struct xfs_fsmap_head xhead = {0};
1749 struct fsmap_head head;
1750 bool aborted = false;
1751 int error;
1752
1753 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1754 return -EFAULT;
1755 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1756 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1757 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1758 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1759 sizeof(head.fmh_keys[1].fmr_reserved)))
1760 return -EINVAL;
1761
1762 xhead.fmh_iflags = head.fmh_iflags;
1763 xhead.fmh_count = head.fmh_count;
1764 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1765 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1766
1767 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1768 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1769
1770 info.mp = ip->i_mount;
1771 info.data = arg;
1772 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1773 if (error == -ECANCELED) {
1774 error = 0;
1775 aborted = true;
1776 } else if (error)
1777 return error;
1778
1779 /* If we didn't abort, set the "last" flag in the last fmx */
1780 if (!aborted && info.idx) {
1781 info.last_flags |= FMR_OF_LAST;
1782 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1783 &info.last_flags, sizeof(info.last_flags)))
1784 return -EFAULT;
1785 }
1786
1787 /* copy back header */
1788 head.fmh_entries = xhead.fmh_entries;
1789 head.fmh_oflags = xhead.fmh_oflags;
1790 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1791 return -EFAULT;
1792
1793 return 0;
1794}
1795
1796STATIC int
1797xfs_ioc_scrub_metadata(
1798 struct xfs_inode *ip,
1799 void __user *arg)
1800{
1801 struct xfs_scrub_metadata scrub;
1802 int error;
1803
1804 if (!capable(CAP_SYS_ADMIN))
1805 return -EPERM;
1806
1807 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1808 return -EFAULT;
1809
1810 error = xfs_scrub_metadata(ip, &scrub);
1811 if (error)
1812 return error;
1813
1814 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1815 return -EFAULT;
1816
1817 return 0;
1818}
1819
1820int
1821xfs_ioc_swapext(
1822 xfs_swapext_t *sxp)
1823{
1824 xfs_inode_t *ip, *tip;
1825 struct fd f, tmp;
1826 int error = 0;
1827
1828 /* Pull information for the target fd */
1829 f = fdget((int)sxp->sx_fdtarget);
1830 if (!f.file) {
1831 error = -EINVAL;
1832 goto out;
1833 }
1834
1835 if (!(f.file->f_mode & FMODE_WRITE) ||
1836 !(f.file->f_mode & FMODE_READ) ||
1837 (f.file->f_flags & O_APPEND)) {
1838 error = -EBADF;
1839 goto out_put_file;
1840 }
1841
1842 tmp = fdget((int)sxp->sx_fdtmp);
1843 if (!tmp.file) {
1844 error = -EINVAL;
1845 goto out_put_file;
1846 }
1847
1848 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1849 !(tmp.file->f_mode & FMODE_READ) ||
1850 (tmp.file->f_flags & O_APPEND)) {
1851 error = -EBADF;
1852 goto out_put_tmp_file;
1853 }
1854
1855 if (IS_SWAPFILE(file_inode(f.file)) ||
1856 IS_SWAPFILE(file_inode(tmp.file))) {
1857 error = -EINVAL;
1858 goto out_put_tmp_file;
1859 }
1860
1861 /*
1862 * We need to ensure that the fds passed in point to XFS inodes
1863 * before we cast and access them as XFS structures as we have no
1864 * control over what the user passes us here.
1865 */
1866 if (f.file->f_op != &xfs_file_operations ||
1867 tmp.file->f_op != &xfs_file_operations) {
1868 error = -EINVAL;
1869 goto out_put_tmp_file;
1870 }
1871
1872 ip = XFS_I(file_inode(f.file));
1873 tip = XFS_I(file_inode(tmp.file));
1874
1875 if (ip->i_mount != tip->i_mount) {
1876 error = -EINVAL;
1877 goto out_put_tmp_file;
1878 }
1879
1880 if (ip->i_ino == tip->i_ino) {
1881 error = -EINVAL;
1882 goto out_put_tmp_file;
1883 }
1884
1885 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1886 error = -EIO;
1887 goto out_put_tmp_file;
1888 }
1889
1890 error = xfs_swap_extents(ip, tip, sxp);
1891
1892 out_put_tmp_file:
1893 fdput(tmp);
1894 out_put_file:
1895 fdput(f);
1896 out:
1897 return error;
1898}
1899
1900static int
1901xfs_ioc_getlabel(
1902 struct xfs_mount *mp,
1903 char __user *user_label)
1904{
1905 struct xfs_sb *sbp = &mp->m_sb;
1906 char label[XFSLABEL_MAX + 1];
1907
1908 /* Paranoia */
1909 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1910
1911 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1912 memset(label, 0, sizeof(label));
1913 spin_lock(&mp->m_sb_lock);
1914 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1915 spin_unlock(&mp->m_sb_lock);
1916
1917 if (copy_to_user(user_label, label, sizeof(label)))
1918 return -EFAULT;
1919 return 0;
1920}
1921
1922static int
1923xfs_ioc_setlabel(
1924 struct file *filp,
1925 struct xfs_mount *mp,
1926 char __user *newlabel)
1927{
1928 struct xfs_sb *sbp = &mp->m_sb;
1929 char label[XFSLABEL_MAX + 1];
1930 size_t len;
1931 int error;
1932
1933 if (!capable(CAP_SYS_ADMIN))
1934 return -EPERM;
1935 /*
1936 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1937 * smaller, at 12 bytes. We copy one more to be sure we find the
1938 * (required) NULL character to test the incoming label length.
1939 * NB: The on disk label doesn't need to be null terminated.
1940 */
1941 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1942 return -EFAULT;
1943 len = strnlen(label, XFSLABEL_MAX + 1);
1944 if (len > sizeof(sbp->sb_fname))
1945 return -EINVAL;
1946
1947 error = mnt_want_write_file(filp);
1948 if (error)
1949 return error;
1950
1951 spin_lock(&mp->m_sb_lock);
1952 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1953 memcpy(sbp->sb_fname, label, len);
1954 spin_unlock(&mp->m_sb_lock);
1955
1956 /*
1957 * Now we do several things to satisfy userspace.
1958 * In addition to normal logging of the primary superblock, we also
1959 * immediately write these changes to sector zero for the primary, then
1960 * update all backup supers (as xfs_db does for a label change), then
1961 * invalidate the block device page cache. This is so that any prior
1962 * buffered reads from userspace (i.e. from blkid) are invalidated,
1963 * and userspace will see the newly-written label.
1964 */
1965 error = xfs_sync_sb_buf(mp);
1966 if (error)
1967 goto out;
1968 /*
1969 * growfs also updates backup supers so lock against that.
1970 */
1971 mutex_lock(&mp->m_growlock);
1972 error = xfs_update_secondary_sbs(mp);
1973 mutex_unlock(&mp->m_growlock);
1974
1975 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1976
1977out:
1978 mnt_drop_write_file(filp);
1979 return error;
1980}
1981
1982static inline int
1983xfs_fs_eofblocks_from_user(
1984 struct xfs_fs_eofblocks *src,
1985 struct xfs_eofblocks *dst)
1986{
1987 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1988 return -EINVAL;
1989
1990 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1991 return -EINVAL;
1992
1993 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1994 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1995 return -EINVAL;
1996
1997 dst->eof_flags = src->eof_flags;
1998 dst->eof_prid = src->eof_prid;
1999 dst->eof_min_file_size = src->eof_min_file_size;
2000
2001 dst->eof_uid = INVALID_UID;
2002 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
2003 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
2004 if (!uid_valid(dst->eof_uid))
2005 return -EINVAL;
2006 }
2007
2008 dst->eof_gid = INVALID_GID;
2009 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
2010 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
2011 if (!gid_valid(dst->eof_gid))
2012 return -EINVAL;
2013 }
2014 return 0;
2015}
2016
2017/*
2018 * Note: some of the ioctl's return positive numbers as a
2019 * byte count indicating success, such as readlink_by_handle.
2020 * So we don't "sign flip" like most other routines. This means
2021 * true errors need to be returned as a negative value.
2022 */
2023long
2024xfs_file_ioctl(
2025 struct file *filp,
2026 unsigned int cmd,
2027 unsigned long p)
2028{
2029 struct inode *inode = file_inode(filp);
2030 struct xfs_inode *ip = XFS_I(inode);
2031 struct xfs_mount *mp = ip->i_mount;
2032 void __user *arg = (void __user *)p;
2033 int error;
2034
2035 trace_xfs_file_ioctl(ip);
2036
2037 switch (cmd) {
2038 case FITRIM:
2039 return xfs_ioc_trim(mp, arg);
2040 case FS_IOC_GETFSLABEL:
2041 return xfs_ioc_getlabel(mp, arg);
2042 case FS_IOC_SETFSLABEL:
2043 return xfs_ioc_setlabel(filp, mp, arg);
2044 case XFS_IOC_ALLOCSP:
2045 case XFS_IOC_FREESP:
2046 case XFS_IOC_ALLOCSP64:
2047 case XFS_IOC_FREESP64: {
2048 xfs_flock64_t bf;
2049
2050 if (copy_from_user(&bf, arg, sizeof(bf)))
2051 return -EFAULT;
2052 return xfs_ioc_space(filp, &bf);
2053 }
2054 case XFS_IOC_DIOINFO: {
2055 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
2056 struct dioattr da;
2057
2058 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
2059 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
2060
2061 if (copy_to_user(arg, &da, sizeof(da)))
2062 return -EFAULT;
2063 return 0;
2064 }
2065
2066 case XFS_IOC_FSBULKSTAT_SINGLE:
2067 case XFS_IOC_FSBULKSTAT:
2068 case XFS_IOC_FSINUMBERS:
2069 return xfs_ioc_fsbulkstat(mp, cmd, arg);
2070
2071 case XFS_IOC_BULKSTAT:
2072 return xfs_ioc_bulkstat(mp, cmd, arg);
2073 case XFS_IOC_INUMBERS:
2074 return xfs_ioc_inumbers(mp, cmd, arg);
2075
2076 case XFS_IOC_FSGEOMETRY_V1:
2077 return xfs_ioc_fsgeometry(mp, arg, 3);
2078 case XFS_IOC_FSGEOMETRY_V4:
2079 return xfs_ioc_fsgeometry(mp, arg, 4);
2080 case XFS_IOC_FSGEOMETRY:
2081 return xfs_ioc_fsgeometry(mp, arg, 5);
2082
2083 case XFS_IOC_AG_GEOMETRY:
2084 return xfs_ioc_ag_geometry(mp, arg);
2085
2086 case XFS_IOC_GETVERSION:
2087 return put_user(inode->i_generation, (int __user *)arg);
2088
2089 case XFS_IOC_FSGETXATTR:
2090 return xfs_ioc_fsgetxattr(ip, 0, arg);
2091 case XFS_IOC_FSGETXATTRA:
2092 return xfs_ioc_fsgetxattr(ip, 1, arg);
2093 case XFS_IOC_FSSETXATTR:
2094 return xfs_ioc_fssetxattr(ip, filp, arg);
2095 case XFS_IOC_GETXFLAGS:
2096 return xfs_ioc_getxflags(ip, arg);
2097 case XFS_IOC_SETXFLAGS:
2098 return xfs_ioc_setxflags(ip, filp, arg);
2099
2100 case XFS_IOC_GETBMAP:
2101 case XFS_IOC_GETBMAPA:
2102 case XFS_IOC_GETBMAPX:
2103 return xfs_ioc_getbmap(filp, cmd, arg);
2104
2105 case FS_IOC_GETFSMAP:
2106 return xfs_ioc_getfsmap(ip, arg);
2107
2108 case XFS_IOC_SCRUB_METADATA:
2109 return xfs_ioc_scrub_metadata(ip, arg);
2110
2111 case XFS_IOC_FD_TO_HANDLE:
2112 case XFS_IOC_PATH_TO_HANDLE:
2113 case XFS_IOC_PATH_TO_FSHANDLE: {
2114 xfs_fsop_handlereq_t hreq;
2115
2116 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2117 return -EFAULT;
2118 return xfs_find_handle(cmd, &hreq);
2119 }
2120 case XFS_IOC_OPEN_BY_HANDLE: {
2121 xfs_fsop_handlereq_t hreq;
2122
2123 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2124 return -EFAULT;
2125 return xfs_open_by_handle(filp, &hreq);
2126 }
2127
2128 case XFS_IOC_READLINK_BY_HANDLE: {
2129 xfs_fsop_handlereq_t hreq;
2130
2131 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2132 return -EFAULT;
2133 return xfs_readlink_by_handle(filp, &hreq);
2134 }
2135 case XFS_IOC_ATTRLIST_BY_HANDLE:
2136 return xfs_attrlist_by_handle(filp, arg);
2137
2138 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2139 return xfs_attrmulti_by_handle(filp, arg);
2140
2141 case XFS_IOC_SWAPEXT: {
2142 struct xfs_swapext sxp;
2143
2144 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2145 return -EFAULT;
2146 error = mnt_want_write_file(filp);
2147 if (error)
2148 return error;
2149 error = xfs_ioc_swapext(&sxp);
2150 mnt_drop_write_file(filp);
2151 return error;
2152 }
2153
2154 case XFS_IOC_FSCOUNTS: {
2155 xfs_fsop_counts_t out;
2156
2157 xfs_fs_counts(mp, &out);
2158
2159 if (copy_to_user(arg, &out, sizeof(out)))
2160 return -EFAULT;
2161 return 0;
2162 }
2163
2164 case XFS_IOC_SET_RESBLKS: {
2165 xfs_fsop_resblks_t inout;
2166 uint64_t in;
2167
2168 if (!capable(CAP_SYS_ADMIN))
2169 return -EPERM;
2170
2171 if (mp->m_flags & XFS_MOUNT_RDONLY)
2172 return -EROFS;
2173
2174 if (copy_from_user(&inout, arg, sizeof(inout)))
2175 return -EFAULT;
2176
2177 error = mnt_want_write_file(filp);
2178 if (error)
2179 return error;
2180
2181 /* input parameter is passed in resblks field of structure */
2182 in = inout.resblks;
2183 error = xfs_reserve_blocks(mp, &in, &inout);
2184 mnt_drop_write_file(filp);
2185 if (error)
2186 return error;
2187
2188 if (copy_to_user(arg, &inout, sizeof(inout)))
2189 return -EFAULT;
2190 return 0;
2191 }
2192
2193 case XFS_IOC_GET_RESBLKS: {
2194 xfs_fsop_resblks_t out;
2195
2196 if (!capable(CAP_SYS_ADMIN))
2197 return -EPERM;
2198
2199 error = xfs_reserve_blocks(mp, NULL, &out);
2200 if (error)
2201 return error;
2202
2203 if (copy_to_user(arg, &out, sizeof(out)))
2204 return -EFAULT;
2205
2206 return 0;
2207 }
2208
2209 case XFS_IOC_FSGROWFSDATA: {
2210 xfs_growfs_data_t in;
2211
2212 if (copy_from_user(&in, arg, sizeof(in)))
2213 return -EFAULT;
2214
2215 error = mnt_want_write_file(filp);
2216 if (error)
2217 return error;
2218 error = xfs_growfs_data(mp, &in);
2219 mnt_drop_write_file(filp);
2220 return error;
2221 }
2222
2223 case XFS_IOC_FSGROWFSLOG: {
2224 xfs_growfs_log_t in;
2225
2226 if (copy_from_user(&in, arg, sizeof(in)))
2227 return -EFAULT;
2228
2229 error = mnt_want_write_file(filp);
2230 if (error)
2231 return error;
2232 error = xfs_growfs_log(mp, &in);
2233 mnt_drop_write_file(filp);
2234 return error;
2235 }
2236
2237 case XFS_IOC_FSGROWFSRT: {
2238 xfs_growfs_rt_t in;
2239
2240 if (copy_from_user(&in, arg, sizeof(in)))
2241 return -EFAULT;
2242
2243 error = mnt_want_write_file(filp);
2244 if (error)
2245 return error;
2246 error = xfs_growfs_rt(mp, &in);
2247 mnt_drop_write_file(filp);
2248 return error;
2249 }
2250
2251 case XFS_IOC_GOINGDOWN: {
2252 uint32_t in;
2253
2254 if (!capable(CAP_SYS_ADMIN))
2255 return -EPERM;
2256
2257 if (get_user(in, (uint32_t __user *)arg))
2258 return -EFAULT;
2259
2260 return xfs_fs_goingdown(mp, in);
2261 }
2262
2263 case XFS_IOC_ERROR_INJECTION: {
2264 xfs_error_injection_t in;
2265
2266 if (!capable(CAP_SYS_ADMIN))
2267 return -EPERM;
2268
2269 if (copy_from_user(&in, arg, sizeof(in)))
2270 return -EFAULT;
2271
2272 return xfs_errortag_add(mp, in.errtag);
2273 }
2274
2275 case XFS_IOC_ERROR_CLEARALL:
2276 if (!capable(CAP_SYS_ADMIN))
2277 return -EPERM;
2278
2279 return xfs_errortag_clearall(mp);
2280
2281 case XFS_IOC_FREE_EOFBLOCKS: {
2282 struct xfs_fs_eofblocks eofb;
2283 struct xfs_eofblocks keofb;
2284
2285 if (!capable(CAP_SYS_ADMIN))
2286 return -EPERM;
2287
2288 if (mp->m_flags & XFS_MOUNT_RDONLY)
2289 return -EROFS;
2290
2291 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2292 return -EFAULT;
2293
2294 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2295 if (error)
2296 return error;
2297
2298 sb_start_write(mp->m_super);
2299 error = xfs_icache_free_eofblocks(mp, &keofb);
2300 sb_end_write(mp->m_super);
2301 return error;
2302 }
2303
2304 default:
2305 return -ENOTTY;
2306 }
2307}