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_da_format.h"
19#include "xfs_da_btree.h"
20#include "xfs_attr.h"
21#include "xfs_bmap.h"
22#include "xfs_bmap_util.h"
23#include "xfs_fsops.h"
24#include "xfs_discard.h"
25#include "xfs_quota.h"
26#include "xfs_export.h"
27#include "xfs_trace.h"
28#include "xfs_icache.h"
29#include "xfs_trans.h"
30#include "xfs_acl.h"
31#include "xfs_btree.h"
32#include <linux/fsmap.h>
33#include "xfs_fsmap.h"
34#include "scrub/xfs_scrub.h"
35#include "xfs_sb.h"
36#include "xfs_ag.h"
37#include "xfs_health.h"
38#include "xfs_reflink.h"
39#include "xfs_ioctl.h"
40#include "xfs_xattr.h"
41#include "xfs_rtbitmap.h"
42
43#include <linux/mount.h>
44#include <linux/namei.h>
45#include <linux/fileattr.h>
46
47/*
48 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
49 * a file or fs handle.
50 *
51 * XFS_IOC_PATH_TO_FSHANDLE
52 * returns fs handle for a mount point or path within that mount point
53 * XFS_IOC_FD_TO_HANDLE
54 * returns full handle for a FD opened in user space
55 * XFS_IOC_PATH_TO_HANDLE
56 * returns full handle for a path
57 */
58int
59xfs_find_handle(
60 unsigned int cmd,
61 xfs_fsop_handlereq_t *hreq)
62{
63 int hsize;
64 xfs_handle_t handle;
65 struct inode *inode;
66 struct fd f = {NULL};
67 struct path path;
68 int error;
69 struct xfs_inode *ip;
70
71 if (cmd == XFS_IOC_FD_TO_HANDLE) {
72 f = fdget(hreq->fd);
73 if (!f.file)
74 return -EBADF;
75 inode = file_inode(f.file);
76 } else {
77 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
78 if (error)
79 return error;
80 inode = d_inode(path.dentry);
81 }
82 ip = XFS_I(inode);
83
84 /*
85 * We can only generate handles for inodes residing on a XFS filesystem,
86 * and only for regular files, directories or symbolic links.
87 */
88 error = -EINVAL;
89 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
90 goto out_put;
91
92 error = -EBADF;
93 if (!S_ISREG(inode->i_mode) &&
94 !S_ISDIR(inode->i_mode) &&
95 !S_ISLNK(inode->i_mode))
96 goto out_put;
97
98
99 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
100
101 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
102 /*
103 * This handle only contains an fsid, zero the rest.
104 */
105 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
106 hsize = sizeof(xfs_fsid_t);
107 } else {
108 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
109 sizeof(handle.ha_fid.fid_len);
110 handle.ha_fid.fid_pad = 0;
111 handle.ha_fid.fid_gen = inode->i_generation;
112 handle.ha_fid.fid_ino = ip->i_ino;
113 hsize = sizeof(xfs_handle_t);
114 }
115
116 error = -EFAULT;
117 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
118 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
119 goto out_put;
120
121 error = 0;
122
123 out_put:
124 if (cmd == XFS_IOC_FD_TO_HANDLE)
125 fdput(f);
126 else
127 path_put(&path);
128 return error;
129}
130
131/*
132 * No need to do permission checks on the various pathname components
133 * as the handle operations are privileged.
134 */
135STATIC int
136xfs_handle_acceptable(
137 void *context,
138 struct dentry *dentry)
139{
140 return 1;
141}
142
143/*
144 * Convert userspace handle data into a dentry.
145 */
146struct dentry *
147xfs_handle_to_dentry(
148 struct file *parfilp,
149 void __user *uhandle,
150 u32 hlen)
151{
152 xfs_handle_t handle;
153 struct xfs_fid64 fid;
154
155 /*
156 * Only allow handle opens under a directory.
157 */
158 if (!S_ISDIR(file_inode(parfilp)->i_mode))
159 return ERR_PTR(-ENOTDIR);
160
161 if (hlen != sizeof(xfs_handle_t))
162 return ERR_PTR(-EINVAL);
163 if (copy_from_user(&handle, uhandle, hlen))
164 return ERR_PTR(-EFAULT);
165 if (handle.ha_fid.fid_len !=
166 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
167 return ERR_PTR(-EINVAL);
168
169 memset(&fid, 0, sizeof(struct fid));
170 fid.ino = handle.ha_fid.fid_ino;
171 fid.gen = handle.ha_fid.fid_gen;
172
173 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
174 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
175 xfs_handle_acceptable, NULL);
176}
177
178STATIC struct dentry *
179xfs_handlereq_to_dentry(
180 struct file *parfilp,
181 xfs_fsop_handlereq_t *hreq)
182{
183 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
184}
185
186int
187xfs_open_by_handle(
188 struct file *parfilp,
189 xfs_fsop_handlereq_t *hreq)
190{
191 const struct cred *cred = current_cred();
192 int error;
193 int fd;
194 int permflag;
195 struct file *filp;
196 struct inode *inode;
197 struct dentry *dentry;
198 fmode_t fmode;
199 struct path path;
200
201 if (!capable(CAP_SYS_ADMIN))
202 return -EPERM;
203
204 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
205 if (IS_ERR(dentry))
206 return PTR_ERR(dentry);
207 inode = d_inode(dentry);
208
209 /* Restrict xfs_open_by_handle to directories & regular files. */
210 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
211 error = -EPERM;
212 goto out_dput;
213 }
214
215#if BITS_PER_LONG != 32
216 hreq->oflags |= O_LARGEFILE;
217#endif
218
219 permflag = hreq->oflags;
220 fmode = OPEN_FMODE(permflag);
221 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
222 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
223 error = -EPERM;
224 goto out_dput;
225 }
226
227 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
228 error = -EPERM;
229 goto out_dput;
230 }
231
232 /* Can't write directories. */
233 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
234 error = -EISDIR;
235 goto out_dput;
236 }
237
238 fd = get_unused_fd_flags(0);
239 if (fd < 0) {
240 error = fd;
241 goto out_dput;
242 }
243
244 path.mnt = parfilp->f_path.mnt;
245 path.dentry = dentry;
246 filp = dentry_open(&path, hreq->oflags, cred);
247 dput(dentry);
248 if (IS_ERR(filp)) {
249 put_unused_fd(fd);
250 return PTR_ERR(filp);
251 }
252
253 if (S_ISREG(inode->i_mode)) {
254 filp->f_flags |= O_NOATIME;
255 filp->f_mode |= FMODE_NOCMTIME;
256 }
257
258 fd_install(fd, filp);
259 return fd;
260
261 out_dput:
262 dput(dentry);
263 return error;
264}
265
266int
267xfs_readlink_by_handle(
268 struct file *parfilp,
269 xfs_fsop_handlereq_t *hreq)
270{
271 struct dentry *dentry;
272 __u32 olen;
273 int error;
274
275 if (!capable(CAP_SYS_ADMIN))
276 return -EPERM;
277
278 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
279 if (IS_ERR(dentry))
280 return PTR_ERR(dentry);
281
282 /* Restrict this handle operation to symlinks only. */
283 if (!d_is_symlink(dentry)) {
284 error = -EINVAL;
285 goto out_dput;
286 }
287
288 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
289 error = -EFAULT;
290 goto out_dput;
291 }
292
293 error = vfs_readlink(dentry, hreq->ohandle, olen);
294
295 out_dput:
296 dput(dentry);
297 return error;
298}
299
300/*
301 * Format an attribute and copy it out to the user's buffer.
302 * Take care to check values and protect against them changing later,
303 * we may be reading them directly out of a user buffer.
304 */
305static void
306xfs_ioc_attr_put_listent(
307 struct xfs_attr_list_context *context,
308 int flags,
309 unsigned char *name,
310 int namelen,
311 int valuelen)
312{
313 struct xfs_attrlist *alist = context->buffer;
314 struct xfs_attrlist_ent *aep;
315 int arraytop;
316
317 ASSERT(!context->seen_enough);
318 ASSERT(context->count >= 0);
319 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
320 ASSERT(context->firstu >= sizeof(*alist));
321 ASSERT(context->firstu <= context->bufsize);
322
323 /*
324 * Only list entries in the right namespace.
325 */
326 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
327 return;
328
329 arraytop = sizeof(*alist) +
330 context->count * sizeof(alist->al_offset[0]);
331
332 /* decrement by the actual bytes used by the attr */
333 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
334 namelen + 1, sizeof(uint32_t));
335 if (context->firstu < arraytop) {
336 trace_xfs_attr_list_full(context);
337 alist->al_more = 1;
338 context->seen_enough = 1;
339 return;
340 }
341
342 aep = context->buffer + context->firstu;
343 aep->a_valuelen = valuelen;
344 memcpy(aep->a_name, name, namelen);
345 aep->a_name[namelen] = 0;
346 alist->al_offset[context->count++] = context->firstu;
347 alist->al_count = context->count;
348 trace_xfs_attr_list_add(context);
349}
350
351static unsigned int
352xfs_attr_filter(
353 u32 ioc_flags)
354{
355 if (ioc_flags & XFS_IOC_ATTR_ROOT)
356 return XFS_ATTR_ROOT;
357 if (ioc_flags & XFS_IOC_ATTR_SECURE)
358 return XFS_ATTR_SECURE;
359 return 0;
360}
361
362static unsigned int
363xfs_attr_flags(
364 u32 ioc_flags)
365{
366 if (ioc_flags & XFS_IOC_ATTR_CREATE)
367 return XATTR_CREATE;
368 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
369 return XATTR_REPLACE;
370 return 0;
371}
372
373int
374xfs_ioc_attr_list(
375 struct xfs_inode *dp,
376 void __user *ubuf,
377 size_t bufsize,
378 int flags,
379 struct xfs_attrlist_cursor __user *ucursor)
380{
381 struct xfs_attr_list_context context = { };
382 struct xfs_attrlist *alist;
383 void *buffer;
384 int error;
385
386 if (bufsize < sizeof(struct xfs_attrlist) ||
387 bufsize > XFS_XATTR_LIST_MAX)
388 return -EINVAL;
389
390 /*
391 * Reject flags, only allow namespaces.
392 */
393 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
394 return -EINVAL;
395 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
396 return -EINVAL;
397
398 /*
399 * Validate the cursor.
400 */
401 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
402 return -EFAULT;
403 if (context.cursor.pad1 || context.cursor.pad2)
404 return -EINVAL;
405 if (!context.cursor.initted &&
406 (context.cursor.hashval || context.cursor.blkno ||
407 context.cursor.offset))
408 return -EINVAL;
409
410 buffer = kvzalloc(bufsize, GFP_KERNEL);
411 if (!buffer)
412 return -ENOMEM;
413
414 /*
415 * Initialize the output buffer.
416 */
417 context.dp = dp;
418 context.resynch = 1;
419 context.attr_filter = xfs_attr_filter(flags);
420 context.buffer = buffer;
421 context.bufsize = round_down(bufsize, sizeof(uint32_t));
422 context.firstu = context.bufsize;
423 context.put_listent = xfs_ioc_attr_put_listent;
424
425 alist = context.buffer;
426 alist->al_count = 0;
427 alist->al_more = 0;
428 alist->al_offset[0] = context.bufsize;
429
430 error = xfs_attr_list(&context);
431 if (error)
432 goto out_free;
433
434 if (copy_to_user(ubuf, buffer, bufsize) ||
435 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
436 error = -EFAULT;
437out_free:
438 kmem_free(buffer);
439 return error;
440}
441
442STATIC int
443xfs_attrlist_by_handle(
444 struct file *parfilp,
445 struct xfs_fsop_attrlist_handlereq __user *p)
446{
447 struct xfs_fsop_attrlist_handlereq al_hreq;
448 struct dentry *dentry;
449 int error = -ENOMEM;
450
451 if (!capable(CAP_SYS_ADMIN))
452 return -EPERM;
453 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
454 return -EFAULT;
455
456 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
457 if (IS_ERR(dentry))
458 return PTR_ERR(dentry);
459
460 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
461 al_hreq.buflen, al_hreq.flags, &p->pos);
462 dput(dentry);
463 return error;
464}
465
466static int
467xfs_attrmulti_attr_get(
468 struct inode *inode,
469 unsigned char *name,
470 unsigned char __user *ubuf,
471 uint32_t *len,
472 uint32_t flags)
473{
474 struct xfs_da_args args = {
475 .dp = XFS_I(inode),
476 .attr_filter = xfs_attr_filter(flags),
477 .attr_flags = xfs_attr_flags(flags),
478 .name = name,
479 .namelen = strlen(name),
480 .valuelen = *len,
481 };
482 int error;
483
484 if (*len > XFS_XATTR_SIZE_MAX)
485 return -EINVAL;
486
487 error = xfs_attr_get(&args);
488 if (error)
489 goto out_kfree;
490
491 *len = args.valuelen;
492 if (copy_to_user(ubuf, args.value, args.valuelen))
493 error = -EFAULT;
494
495out_kfree:
496 kmem_free(args.value);
497 return error;
498}
499
500static int
501xfs_attrmulti_attr_set(
502 struct inode *inode,
503 unsigned char *name,
504 const unsigned char __user *ubuf,
505 uint32_t len,
506 uint32_t flags)
507{
508 struct xfs_da_args args = {
509 .dp = XFS_I(inode),
510 .attr_filter = xfs_attr_filter(flags),
511 .attr_flags = xfs_attr_flags(flags),
512 .name = name,
513 .namelen = strlen(name),
514 };
515 int error;
516
517 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
518 return -EPERM;
519
520 if (ubuf) {
521 if (len > XFS_XATTR_SIZE_MAX)
522 return -EINVAL;
523 args.value = memdup_user(ubuf, len);
524 if (IS_ERR(args.value))
525 return PTR_ERR(args.value);
526 args.valuelen = len;
527 }
528
529 error = xfs_attr_change(&args);
530 if (!error && (flags & XFS_IOC_ATTR_ROOT))
531 xfs_forget_acl(inode, name);
532 kfree(args.value);
533 return error;
534}
535
536int
537xfs_ioc_attrmulti_one(
538 struct file *parfilp,
539 struct inode *inode,
540 uint32_t opcode,
541 void __user *uname,
542 void __user *value,
543 uint32_t *len,
544 uint32_t flags)
545{
546 unsigned char *name;
547 int error;
548
549 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
550 return -EINVAL;
551
552 name = strndup_user(uname, MAXNAMELEN);
553 if (IS_ERR(name))
554 return PTR_ERR(name);
555
556 switch (opcode) {
557 case ATTR_OP_GET:
558 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
559 break;
560 case ATTR_OP_REMOVE:
561 value = NULL;
562 *len = 0;
563 fallthrough;
564 case ATTR_OP_SET:
565 error = mnt_want_write_file(parfilp);
566 if (error)
567 break;
568 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
569 mnt_drop_write_file(parfilp);
570 break;
571 default:
572 error = -EINVAL;
573 break;
574 }
575
576 kfree(name);
577 return error;
578}
579
580STATIC int
581xfs_attrmulti_by_handle(
582 struct file *parfilp,
583 void __user *arg)
584{
585 int error;
586 xfs_attr_multiop_t *ops;
587 xfs_fsop_attrmulti_handlereq_t am_hreq;
588 struct dentry *dentry;
589 unsigned int i, size;
590
591 if (!capable(CAP_SYS_ADMIN))
592 return -EPERM;
593 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
594 return -EFAULT;
595
596 /* overflow check */
597 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
598 return -E2BIG;
599
600 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
601 if (IS_ERR(dentry))
602 return PTR_ERR(dentry);
603
604 error = -E2BIG;
605 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
606 if (!size || size > 16 * PAGE_SIZE)
607 goto out_dput;
608
609 ops = memdup_user(am_hreq.ops, size);
610 if (IS_ERR(ops)) {
611 error = PTR_ERR(ops);
612 goto out_dput;
613 }
614
615 error = 0;
616 for (i = 0; i < am_hreq.opcount; i++) {
617 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
618 d_inode(dentry), ops[i].am_opcode,
619 ops[i].am_attrname, ops[i].am_attrvalue,
620 &ops[i].am_length, ops[i].am_flags);
621 }
622
623 if (copy_to_user(am_hreq.ops, ops, size))
624 error = -EFAULT;
625
626 kfree(ops);
627 out_dput:
628 dput(dentry);
629 return error;
630}
631
632/* Return 0 on success or positive error */
633int
634xfs_fsbulkstat_one_fmt(
635 struct xfs_ibulk *breq,
636 const struct xfs_bulkstat *bstat)
637{
638 struct xfs_bstat bs1;
639
640 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
641 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
642 return -EFAULT;
643 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
644}
645
646int
647xfs_fsinumbers_fmt(
648 struct xfs_ibulk *breq,
649 const struct xfs_inumbers *igrp)
650{
651 struct xfs_inogrp ig1;
652
653 xfs_inumbers_to_inogrp(&ig1, igrp);
654 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
655 return -EFAULT;
656 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
657}
658
659STATIC int
660xfs_ioc_fsbulkstat(
661 struct file *file,
662 unsigned int cmd,
663 void __user *arg)
664{
665 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
666 struct xfs_fsop_bulkreq bulkreq;
667 struct xfs_ibulk breq = {
668 .mp = mp,
669 .idmap = file_mnt_idmap(file),
670 .ocount = 0,
671 };
672 xfs_ino_t lastino;
673 int error;
674
675 /* done = 1 if there are more stats to get and if bulkstat */
676 /* should be called again (unused here, but used in dmapi) */
677
678 if (!capable(CAP_SYS_ADMIN))
679 return -EPERM;
680
681 if (xfs_is_shutdown(mp))
682 return -EIO;
683
684 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
685 return -EFAULT;
686
687 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
688 return -EFAULT;
689
690 if (bulkreq.icount <= 0)
691 return -EINVAL;
692
693 if (bulkreq.ubuffer == NULL)
694 return -EINVAL;
695
696 breq.ubuffer = bulkreq.ubuffer;
697 breq.icount = bulkreq.icount;
698
699 /*
700 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
701 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
702 * that *lastip contains either zero or the number of the last inode to
703 * be examined by the previous call and return results starting with
704 * the next inode after that. The new bulk request back end functions
705 * take the inode to start with, so we have to compute the startino
706 * parameter from lastino to maintain correct function. lastino == 0
707 * is a special case because it has traditionally meant "first inode
708 * in filesystem".
709 */
710 if (cmd == XFS_IOC_FSINUMBERS) {
711 breq.startino = lastino ? lastino + 1 : 0;
712 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
713 lastino = breq.startino - 1;
714 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
715 breq.startino = lastino;
716 breq.icount = 1;
717 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
718 } else { /* XFS_IOC_FSBULKSTAT */
719 breq.startino = lastino ? lastino + 1 : 0;
720 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
721 lastino = breq.startino - 1;
722 }
723
724 if (error)
725 return error;
726
727 if (bulkreq.lastip != NULL &&
728 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
729 return -EFAULT;
730
731 if (bulkreq.ocount != NULL &&
732 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
733 return -EFAULT;
734
735 return 0;
736}
737
738/* Return 0 on success or positive error */
739static int
740xfs_bulkstat_fmt(
741 struct xfs_ibulk *breq,
742 const struct xfs_bulkstat *bstat)
743{
744 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
745 return -EFAULT;
746 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
747}
748
749/*
750 * Check the incoming bulk request @hdr from userspace and initialize the
751 * internal @breq bulk request appropriately. Returns 0 if the bulk request
752 * should proceed; -ECANCELED if there's nothing to do; or the usual
753 * negative error code.
754 */
755static int
756xfs_bulk_ireq_setup(
757 struct xfs_mount *mp,
758 const struct xfs_bulk_ireq *hdr,
759 struct xfs_ibulk *breq,
760 void __user *ubuffer)
761{
762 if (hdr->icount == 0 ||
763 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
764 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
765 return -EINVAL;
766
767 breq->startino = hdr->ino;
768 breq->ubuffer = ubuffer;
769 breq->icount = hdr->icount;
770 breq->ocount = 0;
771 breq->flags = 0;
772
773 /*
774 * The @ino parameter is a special value, so we must look it up here.
775 * We're not allowed to have IREQ_AGNO, and we only return one inode
776 * worth of data.
777 */
778 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
779 if (hdr->flags & XFS_BULK_IREQ_AGNO)
780 return -EINVAL;
781
782 switch (hdr->ino) {
783 case XFS_BULK_IREQ_SPECIAL_ROOT:
784 breq->startino = mp->m_sb.sb_rootino;
785 break;
786 default:
787 return -EINVAL;
788 }
789 breq->icount = 1;
790 }
791
792 /*
793 * The IREQ_AGNO flag means that we only want results from a given AG.
794 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
795 * beyond the specified AG then we return no results.
796 */
797 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
798 if (hdr->agno >= mp->m_sb.sb_agcount)
799 return -EINVAL;
800
801 if (breq->startino == 0)
802 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
803 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
804 return -EINVAL;
805
806 breq->flags |= XFS_IBULK_SAME_AG;
807
808 /* Asking for an inode past the end of the AG? We're done! */
809 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
810 return -ECANCELED;
811 } else if (hdr->agno)
812 return -EINVAL;
813
814 /* Asking for an inode past the end of the FS? We're done! */
815 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
816 return -ECANCELED;
817
818 if (hdr->flags & XFS_BULK_IREQ_NREXT64)
819 breq->flags |= XFS_IBULK_NREXT64;
820
821 return 0;
822}
823
824/*
825 * Update the userspace bulk request @hdr to reflect the end state of the
826 * internal bulk request @breq.
827 */
828static void
829xfs_bulk_ireq_teardown(
830 struct xfs_bulk_ireq *hdr,
831 struct xfs_ibulk *breq)
832{
833 hdr->ino = breq->startino;
834 hdr->ocount = breq->ocount;
835}
836
837/* Handle the v5 bulkstat ioctl. */
838STATIC int
839xfs_ioc_bulkstat(
840 struct file *file,
841 unsigned int cmd,
842 struct xfs_bulkstat_req __user *arg)
843{
844 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
845 struct xfs_bulk_ireq hdr;
846 struct xfs_ibulk breq = {
847 .mp = mp,
848 .idmap = file_mnt_idmap(file),
849 };
850 int error;
851
852 if (!capable(CAP_SYS_ADMIN))
853 return -EPERM;
854
855 if (xfs_is_shutdown(mp))
856 return -EIO;
857
858 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
859 return -EFAULT;
860
861 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
862 if (error == -ECANCELED)
863 goto out_teardown;
864 if (error < 0)
865 return error;
866
867 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
868 if (error)
869 return error;
870
871out_teardown:
872 xfs_bulk_ireq_teardown(&hdr, &breq);
873 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
874 return -EFAULT;
875
876 return 0;
877}
878
879STATIC int
880xfs_inumbers_fmt(
881 struct xfs_ibulk *breq,
882 const struct xfs_inumbers *igrp)
883{
884 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
885 return -EFAULT;
886 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
887}
888
889/* Handle the v5 inumbers ioctl. */
890STATIC int
891xfs_ioc_inumbers(
892 struct xfs_mount *mp,
893 unsigned int cmd,
894 struct xfs_inumbers_req __user *arg)
895{
896 struct xfs_bulk_ireq hdr;
897 struct xfs_ibulk breq = {
898 .mp = mp,
899 };
900 int error;
901
902 if (!capable(CAP_SYS_ADMIN))
903 return -EPERM;
904
905 if (xfs_is_shutdown(mp))
906 return -EIO;
907
908 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
909 return -EFAULT;
910
911 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
912 if (error == -ECANCELED)
913 goto out_teardown;
914 if (error < 0)
915 return error;
916
917 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
918 if (error)
919 return error;
920
921out_teardown:
922 xfs_bulk_ireq_teardown(&hdr, &breq);
923 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
924 return -EFAULT;
925
926 return 0;
927}
928
929STATIC int
930xfs_ioc_fsgeometry(
931 struct xfs_mount *mp,
932 void __user *arg,
933 int struct_version)
934{
935 struct xfs_fsop_geom fsgeo;
936 size_t len;
937
938 xfs_fs_geometry(mp, &fsgeo, struct_version);
939
940 if (struct_version <= 3)
941 len = sizeof(struct xfs_fsop_geom_v1);
942 else if (struct_version == 4)
943 len = sizeof(struct xfs_fsop_geom_v4);
944 else {
945 xfs_fsop_geom_health(mp, &fsgeo);
946 len = sizeof(fsgeo);
947 }
948
949 if (copy_to_user(arg, &fsgeo, len))
950 return -EFAULT;
951 return 0;
952}
953
954STATIC int
955xfs_ioc_ag_geometry(
956 struct xfs_mount *mp,
957 void __user *arg)
958{
959 struct xfs_perag *pag;
960 struct xfs_ag_geometry ageo;
961 int error;
962
963 if (copy_from_user(&ageo, arg, sizeof(ageo)))
964 return -EFAULT;
965 if (ageo.ag_flags)
966 return -EINVAL;
967 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
968 return -EINVAL;
969
970 pag = xfs_perag_get(mp, ageo.ag_number);
971 if (!pag)
972 return -EINVAL;
973
974 error = xfs_ag_get_geometry(pag, &ageo);
975 xfs_perag_put(pag);
976 if (error)
977 return error;
978
979 if (copy_to_user(arg, &ageo, sizeof(ageo)))
980 return -EFAULT;
981 return 0;
982}
983
984/*
985 * Linux extended inode flags interface.
986 */
987
988static void
989xfs_fill_fsxattr(
990 struct xfs_inode *ip,
991 int whichfork,
992 struct fileattr *fa)
993{
994 struct xfs_mount *mp = ip->i_mount;
995 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
996
997 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
998
999 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
1000 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1001 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
1002 /*
1003 * Don't let a misaligned extent size hint on a directory
1004 * escape to userspace if it won't pass the setattr checks
1005 * later.
1006 */
1007 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
1008 xfs_extlen_to_rtxmod(mp, ip->i_extsize) > 0) {
1009 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
1010 FS_XFLAG_EXTSZINHERIT);
1011 fa->fsx_extsize = 0;
1012 } else {
1013 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1014 }
1015 }
1016
1017 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1018 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
1019 fa->fsx_projid = ip->i_projid;
1020 if (ifp && !xfs_need_iread_extents(ifp))
1021 fa->fsx_nextents = xfs_iext_count(ifp);
1022 else
1023 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1024}
1025
1026STATIC int
1027xfs_ioc_fsgetxattra(
1028 xfs_inode_t *ip,
1029 void __user *arg)
1030{
1031 struct fileattr fa;
1032
1033 xfs_ilock(ip, XFS_ILOCK_SHARED);
1034 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
1035 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1036
1037 return copy_fsxattr_to_user(&fa, arg);
1038}
1039
1040int
1041xfs_fileattr_get(
1042 struct dentry *dentry,
1043 struct fileattr *fa)
1044{
1045 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1046
1047 if (d_is_special(dentry))
1048 return -ENOTTY;
1049
1050 xfs_ilock(ip, XFS_ILOCK_SHARED);
1051 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
1052 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1053
1054 return 0;
1055}
1056
1057STATIC uint16_t
1058xfs_flags2diflags(
1059 struct xfs_inode *ip,
1060 unsigned int xflags)
1061{
1062 /* can't set PREALLOC this way, just preserve it */
1063 uint16_t di_flags =
1064 (ip->i_diflags & XFS_DIFLAG_PREALLOC);
1065
1066 if (xflags & FS_XFLAG_IMMUTABLE)
1067 di_flags |= XFS_DIFLAG_IMMUTABLE;
1068 if (xflags & FS_XFLAG_APPEND)
1069 di_flags |= XFS_DIFLAG_APPEND;
1070 if (xflags & FS_XFLAG_SYNC)
1071 di_flags |= XFS_DIFLAG_SYNC;
1072 if (xflags & FS_XFLAG_NOATIME)
1073 di_flags |= XFS_DIFLAG_NOATIME;
1074 if (xflags & FS_XFLAG_NODUMP)
1075 di_flags |= XFS_DIFLAG_NODUMP;
1076 if (xflags & FS_XFLAG_NODEFRAG)
1077 di_flags |= XFS_DIFLAG_NODEFRAG;
1078 if (xflags & FS_XFLAG_FILESTREAM)
1079 di_flags |= XFS_DIFLAG_FILESTREAM;
1080 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1081 if (xflags & FS_XFLAG_RTINHERIT)
1082 di_flags |= XFS_DIFLAG_RTINHERIT;
1083 if (xflags & FS_XFLAG_NOSYMLINKS)
1084 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1085 if (xflags & FS_XFLAG_EXTSZINHERIT)
1086 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1087 if (xflags & FS_XFLAG_PROJINHERIT)
1088 di_flags |= XFS_DIFLAG_PROJINHERIT;
1089 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1090 if (xflags & FS_XFLAG_REALTIME)
1091 di_flags |= XFS_DIFLAG_REALTIME;
1092 if (xflags & FS_XFLAG_EXTSIZE)
1093 di_flags |= XFS_DIFLAG_EXTSIZE;
1094 }
1095
1096 return di_flags;
1097}
1098
1099STATIC uint64_t
1100xfs_flags2diflags2(
1101 struct xfs_inode *ip,
1102 unsigned int xflags)
1103{
1104 uint64_t di_flags2 =
1105 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
1106 XFS_DIFLAG2_BIGTIME |
1107 XFS_DIFLAG2_NREXT64));
1108
1109 if (xflags & FS_XFLAG_DAX)
1110 di_flags2 |= XFS_DIFLAG2_DAX;
1111 if (xflags & FS_XFLAG_COWEXTSIZE)
1112 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1113
1114 return di_flags2;
1115}
1116
1117static int
1118xfs_ioctl_setattr_xflags(
1119 struct xfs_trans *tp,
1120 struct xfs_inode *ip,
1121 struct fileattr *fa)
1122{
1123 struct xfs_mount *mp = ip->i_mount;
1124 bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME);
1125 uint64_t i_flags2;
1126
1127 if (rtflag != XFS_IS_REALTIME_INODE(ip)) {
1128 /* Can't change realtime flag if any extents are allocated. */
1129 if (ip->i_df.if_nextents || ip->i_delayed_blks)
1130 return -EINVAL;
1131 }
1132
1133 if (rtflag) {
1134 /* If realtime flag is set then must have realtime device */
1135 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1136 xfs_extlen_to_rtxmod(mp, ip->i_extsize))
1137 return -EINVAL;
1138
1139 /* Clear reflink if we are actually able to set the rt flag. */
1140 if (xfs_is_reflink_inode(ip))
1141 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
1142 }
1143
1144 /* diflags2 only valid for v3 inodes. */
1145 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1146 if (i_flags2 && !xfs_has_v3inodes(mp))
1147 return -EINVAL;
1148
1149 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1150 ip->i_diflags2 = i_flags2;
1151
1152 xfs_diflags_to_iflags(ip, false);
1153
1154 /*
1155 * Make the stable writes flag match that of the device the inode
1156 * resides on when flipping the RT flag.
1157 */
1158 if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode))
1159 xfs_update_stable_writes(ip);
1160
1161 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1162 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1163 XFS_STATS_INC(mp, xs_ig_attrchg);
1164 return 0;
1165}
1166
1167static void
1168xfs_ioctl_setattr_prepare_dax(
1169 struct xfs_inode *ip,
1170 struct fileattr *fa)
1171{
1172 struct xfs_mount *mp = ip->i_mount;
1173 struct inode *inode = VFS_I(ip);
1174
1175 if (S_ISDIR(inode->i_mode))
1176 return;
1177
1178 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
1179 return;
1180
1181 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1182 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
1183 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1184 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
1185 d_mark_dontcache(inode);
1186}
1187
1188/*
1189 * Set up the transaction structure for the setattr operation, checking that we
1190 * have permission to do so. On success, return a clean transaction and the
1191 * inode locked exclusively ready for further operation specific checks. On
1192 * failure, return an error without modifying or locking the inode.
1193 */
1194static struct xfs_trans *
1195xfs_ioctl_setattr_get_trans(
1196 struct xfs_inode *ip,
1197 struct xfs_dquot *pdqp)
1198{
1199 struct xfs_mount *mp = ip->i_mount;
1200 struct xfs_trans *tp;
1201 int error = -EROFS;
1202
1203 if (xfs_is_readonly(mp))
1204 goto out_error;
1205 error = -EIO;
1206 if (xfs_is_shutdown(mp))
1207 goto out_error;
1208
1209 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
1210 has_capability_noaudit(current, CAP_FOWNER), &tp);
1211 if (error)
1212 goto out_error;
1213
1214 if (xfs_has_wsync(mp))
1215 xfs_trans_set_sync(tp);
1216
1217 return tp;
1218
1219out_error:
1220 return ERR_PTR(error);
1221}
1222
1223/*
1224 * Validate a proposed extent size hint. For regular files, the hint can only
1225 * be changed if no extents are allocated.
1226 */
1227static int
1228xfs_ioctl_setattr_check_extsize(
1229 struct xfs_inode *ip,
1230 struct fileattr *fa)
1231{
1232 struct xfs_mount *mp = ip->i_mount;
1233 xfs_failaddr_t failaddr;
1234 uint16_t new_diflags;
1235
1236 if (!fa->fsx_valid)
1237 return 0;
1238
1239 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1240 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
1241 return -EINVAL;
1242
1243 if (fa->fsx_extsize & mp->m_blockmask)
1244 return -EINVAL;
1245
1246 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1247
1248 /*
1249 * Inode verifiers do not check that the extent size hint is an integer
1250 * multiple of the rt extent size on a directory with both rtinherit
1251 * and extszinherit flags set. Don't let sysadmins misconfigure
1252 * directories.
1253 */
1254 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
1255 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
1256 unsigned int rtextsize_bytes;
1257
1258 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
1259 if (fa->fsx_extsize % rtextsize_bytes)
1260 return -EINVAL;
1261 }
1262
1263 failaddr = xfs_inode_validate_extsize(ip->i_mount,
1264 XFS_B_TO_FSB(mp, fa->fsx_extsize),
1265 VFS_I(ip)->i_mode, new_diflags);
1266 return failaddr != NULL ? -EINVAL : 0;
1267}
1268
1269static int
1270xfs_ioctl_setattr_check_cowextsize(
1271 struct xfs_inode *ip,
1272 struct fileattr *fa)
1273{
1274 struct xfs_mount *mp = ip->i_mount;
1275 xfs_failaddr_t failaddr;
1276 uint64_t new_diflags2;
1277 uint16_t new_diflags;
1278
1279 if (!fa->fsx_valid)
1280 return 0;
1281
1282 if (fa->fsx_cowextsize & mp->m_blockmask)
1283 return -EINVAL;
1284
1285 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1286 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1287
1288 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
1289 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
1290 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
1291 return failaddr != NULL ? -EINVAL : 0;
1292}
1293
1294static int
1295xfs_ioctl_setattr_check_projid(
1296 struct xfs_inode *ip,
1297 struct fileattr *fa)
1298{
1299 if (!fa->fsx_valid)
1300 return 0;
1301
1302 /* Disallow 32bit project ids if 32bit IDs are not enabled. */
1303 if (fa->fsx_projid > (uint16_t)-1 &&
1304 !xfs_has_projid32(ip->i_mount))
1305 return -EINVAL;
1306 return 0;
1307}
1308
1309int
1310xfs_fileattr_set(
1311 struct mnt_idmap *idmap,
1312 struct dentry *dentry,
1313 struct fileattr *fa)
1314{
1315 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1316 struct xfs_mount *mp = ip->i_mount;
1317 struct xfs_trans *tp;
1318 struct xfs_dquot *pdqp = NULL;
1319 struct xfs_dquot *olddquot = NULL;
1320 int error;
1321
1322 trace_xfs_ioctl_setattr(ip);
1323
1324 if (d_is_special(dentry))
1325 return -ENOTTY;
1326
1327 if (!fa->fsx_valid) {
1328 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1329 FS_NOATIME_FL | FS_NODUMP_FL |
1330 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1331 return -EOPNOTSUPP;
1332 }
1333
1334 error = xfs_ioctl_setattr_check_projid(ip, fa);
1335 if (error)
1336 return error;
1337
1338 /*
1339 * If disk quotas is on, we make sure that the dquots do exist on disk,
1340 * before we start any other transactions. Trying to do this later
1341 * is messy. We don't care to take a readlock to look at the ids
1342 * in inode here, because we can't hold it across the trans_reserve.
1343 * If the IDs do change before we take the ilock, we're covered
1344 * because the i_*dquot fields will get updated anyway.
1345 */
1346 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
1347 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1348 VFS_I(ip)->i_gid, fa->fsx_projid,
1349 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1350 if (error)
1351 return error;
1352 }
1353
1354 xfs_ioctl_setattr_prepare_dax(ip, fa);
1355
1356 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
1357 if (IS_ERR(tp)) {
1358 error = PTR_ERR(tp);
1359 goto error_free_dquots;
1360 }
1361
1362 error = xfs_ioctl_setattr_check_extsize(ip, fa);
1363 if (error)
1364 goto error_trans_cancel;
1365
1366 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1367 if (error)
1368 goto error_trans_cancel;
1369
1370 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1371 if (error)
1372 goto error_trans_cancel;
1373
1374 if (!fa->fsx_valid)
1375 goto skip_xattr;
1376 /*
1377 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1378 * overrides the following restrictions:
1379 *
1380 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1381 * successful return from chown()
1382 */
1383
1384 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1385 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID))
1386 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1387
1388 /* Change the ownerships and register project quota modifications */
1389 if (ip->i_projid != fa->fsx_projid) {
1390 if (XFS_IS_PQUOTA_ON(mp)) {
1391 olddquot = xfs_qm_vop_chown(tp, ip,
1392 &ip->i_pdquot, pdqp);
1393 }
1394 ip->i_projid = fa->fsx_projid;
1395 }
1396
1397 /*
1398 * Only set the extent size hint if we've already determined that the
1399 * extent size hint should be set on the inode. If no extent size flags
1400 * are set on the inode then unconditionally clear the extent size hint.
1401 */
1402 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1403 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1404 else
1405 ip->i_extsize = 0;
1406
1407 if (xfs_has_v3inodes(mp)) {
1408 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1409 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1410 else
1411 ip->i_cowextsize = 0;
1412 }
1413
1414skip_xattr:
1415 error = xfs_trans_commit(tp);
1416
1417 /*
1418 * Release any dquot(s) the inode had kept before chown.
1419 */
1420 xfs_qm_dqrele(olddquot);
1421 xfs_qm_dqrele(pdqp);
1422
1423 return error;
1424
1425error_trans_cancel:
1426 xfs_trans_cancel(tp);
1427error_free_dquots:
1428 xfs_qm_dqrele(pdqp);
1429 return error;
1430}
1431
1432static bool
1433xfs_getbmap_format(
1434 struct kgetbmap *p,
1435 struct getbmapx __user *u,
1436 size_t recsize)
1437{
1438 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1439 put_user(p->bmv_block, &u->bmv_block) ||
1440 put_user(p->bmv_length, &u->bmv_length) ||
1441 put_user(0, &u->bmv_count) ||
1442 put_user(0, &u->bmv_entries))
1443 return false;
1444 if (recsize < sizeof(struct getbmapx))
1445 return true;
1446 if (put_user(0, &u->bmv_iflags) ||
1447 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1448 put_user(0, &u->bmv_unused1) ||
1449 put_user(0, &u->bmv_unused2))
1450 return false;
1451 return true;
1452}
1453
1454STATIC int
1455xfs_ioc_getbmap(
1456 struct file *file,
1457 unsigned int cmd,
1458 void __user *arg)
1459{
1460 struct getbmapx bmx = { 0 };
1461 struct kgetbmap *buf;
1462 size_t recsize;
1463 int error, i;
1464
1465 switch (cmd) {
1466 case XFS_IOC_GETBMAPA:
1467 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1468 fallthrough;
1469 case XFS_IOC_GETBMAP:
1470 /* struct getbmap is a strict subset of struct getbmapx. */
1471 recsize = sizeof(struct getbmap);
1472 break;
1473 case XFS_IOC_GETBMAPX:
1474 recsize = sizeof(struct getbmapx);
1475 break;
1476 default:
1477 return -EINVAL;
1478 }
1479
1480 if (copy_from_user(&bmx, arg, recsize))
1481 return -EFAULT;
1482
1483 if (bmx.bmv_count < 2)
1484 return -EINVAL;
1485 if (bmx.bmv_count >= INT_MAX / recsize)
1486 return -ENOMEM;
1487
1488 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
1489 if (!buf)
1490 return -ENOMEM;
1491
1492 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1493 if (error)
1494 goto out_free_buf;
1495
1496 error = -EFAULT;
1497 if (copy_to_user(arg, &bmx, recsize))
1498 goto out_free_buf;
1499 arg += recsize;
1500
1501 for (i = 0; i < bmx.bmv_entries; i++) {
1502 if (!xfs_getbmap_format(buf + i, arg, recsize))
1503 goto out_free_buf;
1504 arg += recsize;
1505 }
1506
1507 error = 0;
1508out_free_buf:
1509 kmem_free(buf);
1510 return error;
1511}
1512
1513STATIC int
1514xfs_ioc_getfsmap(
1515 struct xfs_inode *ip,
1516 struct fsmap_head __user *arg)
1517{
1518 struct xfs_fsmap_head xhead = {0};
1519 struct fsmap_head head;
1520 struct fsmap *recs;
1521 unsigned int count;
1522 __u32 last_flags = 0;
1523 bool done = false;
1524 int error;
1525
1526 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1527 return -EFAULT;
1528 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1529 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1530 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1531 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1532 sizeof(head.fmh_keys[1].fmr_reserved)))
1533 return -EINVAL;
1534
1535 /*
1536 * Use an internal memory buffer so that we don't have to copy fsmap
1537 * data to userspace while holding locks. Start by trying to allocate
1538 * up to 128k for the buffer, but fall back to a single page if needed.
1539 */
1540 count = min_t(unsigned int, head.fmh_count,
1541 131072 / sizeof(struct fsmap));
1542 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
1543 if (!recs) {
1544 count = min_t(unsigned int, head.fmh_count,
1545 PAGE_SIZE / sizeof(struct fsmap));
1546 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
1547 if (!recs)
1548 return -ENOMEM;
1549 }
1550
1551 xhead.fmh_iflags = head.fmh_iflags;
1552 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1553 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1554
1555 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1556 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1557
1558 head.fmh_entries = 0;
1559 do {
1560 struct fsmap __user *user_recs;
1561 struct fsmap *last_rec;
1562
1563 user_recs = &arg->fmh_recs[head.fmh_entries];
1564 xhead.fmh_entries = 0;
1565 xhead.fmh_count = min_t(unsigned int, count,
1566 head.fmh_count - head.fmh_entries);
1567
1568 /* Run query, record how many entries we got. */
1569 error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1570 switch (error) {
1571 case 0:
1572 /*
1573 * There are no more records in the result set. Copy
1574 * whatever we got to userspace and break out.
1575 */
1576 done = true;
1577 break;
1578 case -ECANCELED:
1579 /*
1580 * The internal memory buffer is full. Copy whatever
1581 * records we got to userspace and go again if we have
1582 * not yet filled the userspace buffer.
1583 */
1584 error = 0;
1585 break;
1586 default:
1587 goto out_free;
1588 }
1589 head.fmh_entries += xhead.fmh_entries;
1590 head.fmh_oflags = xhead.fmh_oflags;
1591
1592 /*
1593 * If the caller wanted a record count or there aren't any
1594 * new records to return, we're done.
1595 */
1596 if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1597 break;
1598
1599 /* Copy all the records we got out to userspace. */
1600 if (copy_to_user(user_recs, recs,
1601 xhead.fmh_entries * sizeof(struct fsmap))) {
1602 error = -EFAULT;
1603 goto out_free;
1604 }
1605
1606 /* Remember the last record flags we copied to userspace. */
1607 last_rec = &recs[xhead.fmh_entries - 1];
1608 last_flags = last_rec->fmr_flags;
1609
1610 /* Set up the low key for the next iteration. */
1611 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1612 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1613 } while (!done && head.fmh_entries < head.fmh_count);
1614
1615 /*
1616 * If there are no more records in the query result set and we're not
1617 * in counting mode, mark the last record returned with the LAST flag.
1618 */
1619 if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1620 struct fsmap __user *user_rec;
1621
1622 last_flags |= FMR_OF_LAST;
1623 user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1624
1625 if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1626 sizeof(last_flags))) {
1627 error = -EFAULT;
1628 goto out_free;
1629 }
1630 }
1631
1632 /* copy back header */
1633 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1634 error = -EFAULT;
1635 goto out_free;
1636 }
1637
1638out_free:
1639 kmem_free(recs);
1640 return error;
1641}
1642
1643STATIC int
1644xfs_ioc_scrub_metadata(
1645 struct file *file,
1646 void __user *arg)
1647{
1648 struct xfs_scrub_metadata scrub;
1649 int error;
1650
1651 if (!capable(CAP_SYS_ADMIN))
1652 return -EPERM;
1653
1654 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1655 return -EFAULT;
1656
1657 error = xfs_scrub_metadata(file, &scrub);
1658 if (error)
1659 return error;
1660
1661 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1662 return -EFAULT;
1663
1664 return 0;
1665}
1666
1667int
1668xfs_ioc_swapext(
1669 xfs_swapext_t *sxp)
1670{
1671 xfs_inode_t *ip, *tip;
1672 struct fd f, tmp;
1673 int error = 0;
1674
1675 /* Pull information for the target fd */
1676 f = fdget((int)sxp->sx_fdtarget);
1677 if (!f.file) {
1678 error = -EINVAL;
1679 goto out;
1680 }
1681
1682 if (!(f.file->f_mode & FMODE_WRITE) ||
1683 !(f.file->f_mode & FMODE_READ) ||
1684 (f.file->f_flags & O_APPEND)) {
1685 error = -EBADF;
1686 goto out_put_file;
1687 }
1688
1689 tmp = fdget((int)sxp->sx_fdtmp);
1690 if (!tmp.file) {
1691 error = -EINVAL;
1692 goto out_put_file;
1693 }
1694
1695 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1696 !(tmp.file->f_mode & FMODE_READ) ||
1697 (tmp.file->f_flags & O_APPEND)) {
1698 error = -EBADF;
1699 goto out_put_tmp_file;
1700 }
1701
1702 if (IS_SWAPFILE(file_inode(f.file)) ||
1703 IS_SWAPFILE(file_inode(tmp.file))) {
1704 error = -EINVAL;
1705 goto out_put_tmp_file;
1706 }
1707
1708 /*
1709 * We need to ensure that the fds passed in point to XFS inodes
1710 * before we cast and access them as XFS structures as we have no
1711 * control over what the user passes us here.
1712 */
1713 if (f.file->f_op != &xfs_file_operations ||
1714 tmp.file->f_op != &xfs_file_operations) {
1715 error = -EINVAL;
1716 goto out_put_tmp_file;
1717 }
1718
1719 ip = XFS_I(file_inode(f.file));
1720 tip = XFS_I(file_inode(tmp.file));
1721
1722 if (ip->i_mount != tip->i_mount) {
1723 error = -EINVAL;
1724 goto out_put_tmp_file;
1725 }
1726
1727 if (ip->i_ino == tip->i_ino) {
1728 error = -EINVAL;
1729 goto out_put_tmp_file;
1730 }
1731
1732 if (xfs_is_shutdown(ip->i_mount)) {
1733 error = -EIO;
1734 goto out_put_tmp_file;
1735 }
1736
1737 error = xfs_swap_extents(ip, tip, sxp);
1738
1739 out_put_tmp_file:
1740 fdput(tmp);
1741 out_put_file:
1742 fdput(f);
1743 out:
1744 return error;
1745}
1746
1747static int
1748xfs_ioc_getlabel(
1749 struct xfs_mount *mp,
1750 char __user *user_label)
1751{
1752 struct xfs_sb *sbp = &mp->m_sb;
1753 char label[XFSLABEL_MAX + 1];
1754
1755 /* Paranoia */
1756 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1757
1758 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1759 memset(label, 0, sizeof(label));
1760 spin_lock(&mp->m_sb_lock);
1761 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1762 spin_unlock(&mp->m_sb_lock);
1763
1764 if (copy_to_user(user_label, label, sizeof(label)))
1765 return -EFAULT;
1766 return 0;
1767}
1768
1769static int
1770xfs_ioc_setlabel(
1771 struct file *filp,
1772 struct xfs_mount *mp,
1773 char __user *newlabel)
1774{
1775 struct xfs_sb *sbp = &mp->m_sb;
1776 char label[XFSLABEL_MAX + 1];
1777 size_t len;
1778 int error;
1779
1780 if (!capable(CAP_SYS_ADMIN))
1781 return -EPERM;
1782 /*
1783 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1784 * smaller, at 12 bytes. We copy one more to be sure we find the
1785 * (required) NULL character to test the incoming label length.
1786 * NB: The on disk label doesn't need to be null terminated.
1787 */
1788 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1789 return -EFAULT;
1790 len = strnlen(label, XFSLABEL_MAX + 1);
1791 if (len > sizeof(sbp->sb_fname))
1792 return -EINVAL;
1793
1794 error = mnt_want_write_file(filp);
1795 if (error)
1796 return error;
1797
1798 spin_lock(&mp->m_sb_lock);
1799 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1800 memcpy(sbp->sb_fname, label, len);
1801 spin_unlock(&mp->m_sb_lock);
1802
1803 /*
1804 * Now we do several things to satisfy userspace.
1805 * In addition to normal logging of the primary superblock, we also
1806 * immediately write these changes to sector zero for the primary, then
1807 * update all backup supers (as xfs_db does for a label change), then
1808 * invalidate the block device page cache. This is so that any prior
1809 * buffered reads from userspace (i.e. from blkid) are invalidated,
1810 * and userspace will see the newly-written label.
1811 */
1812 error = xfs_sync_sb_buf(mp);
1813 if (error)
1814 goto out;
1815 /*
1816 * growfs also updates backup supers so lock against that.
1817 */
1818 mutex_lock(&mp->m_growlock);
1819 error = xfs_update_secondary_sbs(mp);
1820 mutex_unlock(&mp->m_growlock);
1821
1822 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1823
1824out:
1825 mnt_drop_write_file(filp);
1826 return error;
1827}
1828
1829static inline int
1830xfs_fs_eofblocks_from_user(
1831 struct xfs_fs_eofblocks *src,
1832 struct xfs_icwalk *dst)
1833{
1834 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1835 return -EINVAL;
1836
1837 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1838 return -EINVAL;
1839
1840 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1841 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1842 return -EINVAL;
1843
1844 dst->icw_flags = 0;
1845 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1846 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1847 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1848 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1849 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1850 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1851 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1852 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1853 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1854 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1855
1856 dst->icw_prid = src->eof_prid;
1857 dst->icw_min_file_size = src->eof_min_file_size;
1858
1859 dst->icw_uid = INVALID_UID;
1860 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1861 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1862 if (!uid_valid(dst->icw_uid))
1863 return -EINVAL;
1864 }
1865
1866 dst->icw_gid = INVALID_GID;
1867 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1868 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1869 if (!gid_valid(dst->icw_gid))
1870 return -EINVAL;
1871 }
1872 return 0;
1873}
1874
1875static int
1876xfs_ioctl_getset_resblocks(
1877 struct file *filp,
1878 unsigned int cmd,
1879 void __user *arg)
1880{
1881 struct xfs_mount *mp = XFS_I(file_inode(filp))->i_mount;
1882 struct xfs_fsop_resblks fsop = { };
1883 int error;
1884
1885 if (!capable(CAP_SYS_ADMIN))
1886 return -EPERM;
1887
1888 if (cmd == XFS_IOC_SET_RESBLKS) {
1889 if (xfs_is_readonly(mp))
1890 return -EROFS;
1891
1892 if (copy_from_user(&fsop, arg, sizeof(fsop)))
1893 return -EFAULT;
1894
1895 error = mnt_want_write_file(filp);
1896 if (error)
1897 return error;
1898 error = xfs_reserve_blocks(mp, fsop.resblks);
1899 mnt_drop_write_file(filp);
1900 if (error)
1901 return error;
1902 }
1903
1904 spin_lock(&mp->m_sb_lock);
1905 fsop.resblks = mp->m_resblks;
1906 fsop.resblks_avail = mp->m_resblks_avail;
1907 spin_unlock(&mp->m_sb_lock);
1908
1909 if (copy_to_user(arg, &fsop, sizeof(fsop)))
1910 return -EFAULT;
1911 return 0;
1912}
1913
1914static int
1915xfs_ioctl_fs_counts(
1916 struct xfs_mount *mp,
1917 struct xfs_fsop_counts __user *uarg)
1918{
1919 struct xfs_fsop_counts out = {
1920 .allocino = percpu_counter_read_positive(&mp->m_icount),
1921 .freeino = percpu_counter_read_positive(&mp->m_ifree),
1922 .freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
1923 xfs_fdblocks_unavailable(mp),
1924 .freertx = percpu_counter_read_positive(&mp->m_frextents),
1925 };
1926
1927 if (copy_to_user(uarg, &out, sizeof(out)))
1928 return -EFAULT;
1929 return 0;
1930}
1931
1932/*
1933 * These long-unused ioctls were removed from the official ioctl API in 5.17,
1934 * but retain these definitions so that we can log warnings about them.
1935 */
1936#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
1937#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
1938#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
1939#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
1940
1941/*
1942 * Note: some of the ioctl's return positive numbers as a
1943 * byte count indicating success, such as readlink_by_handle.
1944 * So we don't "sign flip" like most other routines. This means
1945 * true errors need to be returned as a negative value.
1946 */
1947long
1948xfs_file_ioctl(
1949 struct file *filp,
1950 unsigned int cmd,
1951 unsigned long p)
1952{
1953 struct inode *inode = file_inode(filp);
1954 struct xfs_inode *ip = XFS_I(inode);
1955 struct xfs_mount *mp = ip->i_mount;
1956 void __user *arg = (void __user *)p;
1957 int error;
1958
1959 trace_xfs_file_ioctl(ip);
1960
1961 switch (cmd) {
1962 case FITRIM:
1963 return xfs_ioc_trim(mp, arg);
1964 case FS_IOC_GETFSLABEL:
1965 return xfs_ioc_getlabel(mp, arg);
1966 case FS_IOC_SETFSLABEL:
1967 return xfs_ioc_setlabel(filp, mp, arg);
1968 case XFS_IOC_ALLOCSP:
1969 case XFS_IOC_FREESP:
1970 case XFS_IOC_ALLOCSP64:
1971 case XFS_IOC_FREESP64:
1972 xfs_warn_once(mp,
1973 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
1974 current->comm);
1975 return -ENOTTY;
1976 case XFS_IOC_DIOINFO: {
1977 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1978 struct dioattr da;
1979
1980 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1981 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1982
1983 if (copy_to_user(arg, &da, sizeof(da)))
1984 return -EFAULT;
1985 return 0;
1986 }
1987
1988 case XFS_IOC_FSBULKSTAT_SINGLE:
1989 case XFS_IOC_FSBULKSTAT:
1990 case XFS_IOC_FSINUMBERS:
1991 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1992
1993 case XFS_IOC_BULKSTAT:
1994 return xfs_ioc_bulkstat(filp, cmd, arg);
1995 case XFS_IOC_INUMBERS:
1996 return xfs_ioc_inumbers(mp, cmd, arg);
1997
1998 case XFS_IOC_FSGEOMETRY_V1:
1999 return xfs_ioc_fsgeometry(mp, arg, 3);
2000 case XFS_IOC_FSGEOMETRY_V4:
2001 return xfs_ioc_fsgeometry(mp, arg, 4);
2002 case XFS_IOC_FSGEOMETRY:
2003 return xfs_ioc_fsgeometry(mp, arg, 5);
2004
2005 case XFS_IOC_AG_GEOMETRY:
2006 return xfs_ioc_ag_geometry(mp, arg);
2007
2008 case XFS_IOC_GETVERSION:
2009 return put_user(inode->i_generation, (int __user *)arg);
2010
2011 case XFS_IOC_FSGETXATTRA:
2012 return xfs_ioc_fsgetxattra(ip, arg);
2013
2014 case XFS_IOC_GETBMAP:
2015 case XFS_IOC_GETBMAPA:
2016 case XFS_IOC_GETBMAPX:
2017 return xfs_ioc_getbmap(filp, cmd, arg);
2018
2019 case FS_IOC_GETFSMAP:
2020 return xfs_ioc_getfsmap(ip, arg);
2021
2022 case XFS_IOC_SCRUB_METADATA:
2023 return xfs_ioc_scrub_metadata(filp, arg);
2024
2025 case XFS_IOC_FD_TO_HANDLE:
2026 case XFS_IOC_PATH_TO_HANDLE:
2027 case XFS_IOC_PATH_TO_FSHANDLE: {
2028 xfs_fsop_handlereq_t hreq;
2029
2030 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2031 return -EFAULT;
2032 return xfs_find_handle(cmd, &hreq);
2033 }
2034 case XFS_IOC_OPEN_BY_HANDLE: {
2035 xfs_fsop_handlereq_t hreq;
2036
2037 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2038 return -EFAULT;
2039 return xfs_open_by_handle(filp, &hreq);
2040 }
2041
2042 case XFS_IOC_READLINK_BY_HANDLE: {
2043 xfs_fsop_handlereq_t hreq;
2044
2045 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2046 return -EFAULT;
2047 return xfs_readlink_by_handle(filp, &hreq);
2048 }
2049 case XFS_IOC_ATTRLIST_BY_HANDLE:
2050 return xfs_attrlist_by_handle(filp, arg);
2051
2052 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2053 return xfs_attrmulti_by_handle(filp, arg);
2054
2055 case XFS_IOC_SWAPEXT: {
2056 struct xfs_swapext sxp;
2057
2058 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2059 return -EFAULT;
2060 error = mnt_want_write_file(filp);
2061 if (error)
2062 return error;
2063 error = xfs_ioc_swapext(&sxp);
2064 mnt_drop_write_file(filp);
2065 return error;
2066 }
2067
2068 case XFS_IOC_FSCOUNTS:
2069 return xfs_ioctl_fs_counts(mp, arg);
2070
2071 case XFS_IOC_SET_RESBLKS:
2072 case XFS_IOC_GET_RESBLKS:
2073 return xfs_ioctl_getset_resblocks(filp, cmd, arg);
2074
2075 case XFS_IOC_FSGROWFSDATA: {
2076 struct xfs_growfs_data in;
2077
2078 if (copy_from_user(&in, arg, sizeof(in)))
2079 return -EFAULT;
2080
2081 error = mnt_want_write_file(filp);
2082 if (error)
2083 return error;
2084 error = xfs_growfs_data(mp, &in);
2085 mnt_drop_write_file(filp);
2086 return error;
2087 }
2088
2089 case XFS_IOC_FSGROWFSLOG: {
2090 struct xfs_growfs_log in;
2091
2092 if (copy_from_user(&in, arg, sizeof(in)))
2093 return -EFAULT;
2094
2095 error = mnt_want_write_file(filp);
2096 if (error)
2097 return error;
2098 error = xfs_growfs_log(mp, &in);
2099 mnt_drop_write_file(filp);
2100 return error;
2101 }
2102
2103 case XFS_IOC_FSGROWFSRT: {
2104 xfs_growfs_rt_t in;
2105
2106 if (copy_from_user(&in, arg, sizeof(in)))
2107 return -EFAULT;
2108
2109 error = mnt_want_write_file(filp);
2110 if (error)
2111 return error;
2112 error = xfs_growfs_rt(mp, &in);
2113 mnt_drop_write_file(filp);
2114 return error;
2115 }
2116
2117 case XFS_IOC_GOINGDOWN: {
2118 uint32_t in;
2119
2120 if (!capable(CAP_SYS_ADMIN))
2121 return -EPERM;
2122
2123 if (get_user(in, (uint32_t __user *)arg))
2124 return -EFAULT;
2125
2126 return xfs_fs_goingdown(mp, in);
2127 }
2128
2129 case XFS_IOC_ERROR_INJECTION: {
2130 xfs_error_injection_t in;
2131
2132 if (!capable(CAP_SYS_ADMIN))
2133 return -EPERM;
2134
2135 if (copy_from_user(&in, arg, sizeof(in)))
2136 return -EFAULT;
2137
2138 return xfs_errortag_add(mp, in.errtag);
2139 }
2140
2141 case XFS_IOC_ERROR_CLEARALL:
2142 if (!capable(CAP_SYS_ADMIN))
2143 return -EPERM;
2144
2145 return xfs_errortag_clearall(mp);
2146
2147 case XFS_IOC_FREE_EOFBLOCKS: {
2148 struct xfs_fs_eofblocks eofb;
2149 struct xfs_icwalk icw;
2150
2151 if (!capable(CAP_SYS_ADMIN))
2152 return -EPERM;
2153
2154 if (xfs_is_readonly(mp))
2155 return -EROFS;
2156
2157 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2158 return -EFAULT;
2159
2160 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
2161 if (error)
2162 return error;
2163
2164 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
2165
2166 sb_start_write(mp->m_super);
2167 error = xfs_blockgc_free_space(mp, &icw);
2168 sb_end_write(mp->m_super);
2169 return error;
2170 }
2171
2172 default:
2173 return -ENOTTY;
2174 }
2175}