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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/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_mount.h"
25#include "xfs_inode.h"
26#include "xfs_ioctl.h"
27#include "xfs_alloc.h"
28#include "xfs_rtalloc.h"
29#include "xfs_itable.h"
30#include "xfs_error.h"
31#include "xfs_attr.h"
32#include "xfs_bmap.h"
33#include "xfs_bmap_util.h"
34#include "xfs_fsops.h"
35#include "xfs_discard.h"
36#include "xfs_quota.h"
37#include "xfs_export.h"
38#include "xfs_trace.h"
39#include "xfs_icache.h"
40#include "xfs_symlink.h"
41#include "xfs_trans.h"
42#include "xfs_pnfs.h"
43#include "xfs_acl.h"
44
45#include <linux/capability.h>
46#include <linux/dcache.h>
47#include <linux/mount.h>
48#include <linux/namei.h>
49#include <linux/pagemap.h>
50#include <linux/slab.h>
51#include <linux/exportfs.h>
52
53/*
54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
55 * a file or fs handle.
56 *
57 * XFS_IOC_PATH_TO_FSHANDLE
58 * returns fs handle for a mount point or path within that mount point
59 * XFS_IOC_FD_TO_HANDLE
60 * returns full handle for a FD opened in user space
61 * XFS_IOC_PATH_TO_HANDLE
62 * returns full handle for a path
63 */
64int
65xfs_find_handle(
66 unsigned int cmd,
67 xfs_fsop_handlereq_t *hreq)
68{
69 int hsize;
70 xfs_handle_t handle;
71 struct inode *inode;
72 struct fd f = {NULL};
73 struct path path;
74 int error;
75 struct xfs_inode *ip;
76
77 if (cmd == XFS_IOC_FD_TO_HANDLE) {
78 f = fdget(hreq->fd);
79 if (!f.file)
80 return -EBADF;
81 inode = file_inode(f.file);
82 } else {
83 error = user_lpath((const char __user *)hreq->path, &path);
84 if (error)
85 return error;
86 inode = d_inode(path.dentry);
87 }
88 ip = XFS_I(inode);
89
90 /*
91 * We can only generate handles for inodes residing on a XFS filesystem,
92 * and only for regular files, directories or symbolic links.
93 */
94 error = -EINVAL;
95 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
96 goto out_put;
97
98 error = -EBADF;
99 if (!S_ISREG(inode->i_mode) &&
100 !S_ISDIR(inode->i_mode) &&
101 !S_ISLNK(inode->i_mode))
102 goto out_put;
103
104
105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
106
107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
108 /*
109 * This handle only contains an fsid, zero the rest.
110 */
111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
112 hsize = sizeof(xfs_fsid_t);
113 } else {
114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
115 sizeof(handle.ha_fid.fid_len);
116 handle.ha_fid.fid_pad = 0;
117 handle.ha_fid.fid_gen = inode->i_generation;
118 handle.ha_fid.fid_ino = ip->i_ino;
119
120 hsize = XFS_HSIZE(handle);
121 }
122
123 error = -EFAULT;
124 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
126 goto out_put;
127
128 error = 0;
129
130 out_put:
131 if (cmd == XFS_IOC_FD_TO_HANDLE)
132 fdput(f);
133 else
134 path_put(&path);
135 return error;
136}
137
138/*
139 * No need to do permission checks on the various pathname components
140 * as the handle operations are privileged.
141 */
142STATIC int
143xfs_handle_acceptable(
144 void *context,
145 struct dentry *dentry)
146{
147 return 1;
148}
149
150/*
151 * Convert userspace handle data into a dentry.
152 */
153struct dentry *
154xfs_handle_to_dentry(
155 struct file *parfilp,
156 void __user *uhandle,
157 u32 hlen)
158{
159 xfs_handle_t handle;
160 struct xfs_fid64 fid;
161
162 /*
163 * Only allow handle opens under a directory.
164 */
165 if (!S_ISDIR(file_inode(parfilp)->i_mode))
166 return ERR_PTR(-ENOTDIR);
167
168 if (hlen != sizeof(xfs_handle_t))
169 return ERR_PTR(-EINVAL);
170 if (copy_from_user(&handle, uhandle, hlen))
171 return ERR_PTR(-EFAULT);
172 if (handle.ha_fid.fid_len !=
173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
174 return ERR_PTR(-EINVAL);
175
176 memset(&fid, 0, sizeof(struct fid));
177 fid.ino = handle.ha_fid.fid_ino;
178 fid.gen = handle.ha_fid.fid_gen;
179
180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
182 xfs_handle_acceptable, NULL);
183}
184
185STATIC struct dentry *
186xfs_handlereq_to_dentry(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
189{
190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
191}
192
193int
194xfs_open_by_handle(
195 struct file *parfilp,
196 xfs_fsop_handlereq_t *hreq)
197{
198 const struct cred *cred = current_cred();
199 int error;
200 int fd;
201 int permflag;
202 struct file *filp;
203 struct inode *inode;
204 struct dentry *dentry;
205 fmode_t fmode;
206 struct path path;
207
208 if (!capable(CAP_SYS_ADMIN))
209 return -EPERM;
210
211 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
212 if (IS_ERR(dentry))
213 return PTR_ERR(dentry);
214 inode = d_inode(dentry);
215
216 /* Restrict xfs_open_by_handle to directories & regular files. */
217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
218 error = -EPERM;
219 goto out_dput;
220 }
221
222#if BITS_PER_LONG != 32
223 hreq->oflags |= O_LARGEFILE;
224#endif
225
226 permflag = hreq->oflags;
227 fmode = OPEN_FMODE(permflag);
228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
230 error = -EPERM;
231 goto out_dput;
232 }
233
234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
235 error = -EACCES;
236 goto out_dput;
237 }
238
239 /* Can't write directories. */
240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
241 error = -EISDIR;
242 goto out_dput;
243 }
244
245 fd = get_unused_fd_flags(0);
246 if (fd < 0) {
247 error = fd;
248 goto out_dput;
249 }
250
251 path.mnt = parfilp->f_path.mnt;
252 path.dentry = dentry;
253 filp = dentry_open(&path, hreq->oflags, cred);
254 dput(dentry);
255 if (IS_ERR(filp)) {
256 put_unused_fd(fd);
257 return PTR_ERR(filp);
258 }
259
260 if (S_ISREG(inode->i_mode)) {
261 filp->f_flags |= O_NOATIME;
262 filp->f_mode |= FMODE_NOCMTIME;
263 }
264
265 fd_install(fd, filp);
266 return fd;
267
268 out_dput:
269 dput(dentry);
270 return error;
271}
272
273int
274xfs_readlink_by_handle(
275 struct file *parfilp,
276 xfs_fsop_handlereq_t *hreq)
277{
278 struct dentry *dentry;
279 __u32 olen;
280 void *link;
281 int error;
282
283 if (!capable(CAP_SYS_ADMIN))
284 return -EPERM;
285
286 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
287 if (IS_ERR(dentry))
288 return PTR_ERR(dentry);
289
290 /* Restrict this handle operation to symlinks only. */
291 if (!d_is_symlink(dentry)) {
292 error = -EINVAL;
293 goto out_dput;
294 }
295
296 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
297 error = -EFAULT;
298 goto out_dput;
299 }
300
301 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
302 if (!link) {
303 error = -ENOMEM;
304 goto out_dput;
305 }
306
307 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
308 if (error)
309 goto out_kfree;
310 error = readlink_copy(hreq->ohandle, olen, link);
311 if (error)
312 goto out_kfree;
313
314 out_kfree:
315 kfree(link);
316 out_dput:
317 dput(dentry);
318 return error;
319}
320
321int
322xfs_set_dmattrs(
323 xfs_inode_t *ip,
324 u_int evmask,
325 u_int16_t state)
326{
327 xfs_mount_t *mp = ip->i_mount;
328 xfs_trans_t *tp;
329 int error;
330
331 if (!capable(CAP_SYS_ADMIN))
332 return -EPERM;
333
334 if (XFS_FORCED_SHUTDOWN(mp))
335 return -EIO;
336
337 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
338 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
339 if (error) {
340 xfs_trans_cancel(tp);
341 return error;
342 }
343 xfs_ilock(ip, XFS_ILOCK_EXCL);
344 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
345
346 ip->i_d.di_dmevmask = evmask;
347 ip->i_d.di_dmstate = state;
348
349 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
350 error = xfs_trans_commit(tp);
351
352 return error;
353}
354
355STATIC int
356xfs_fssetdm_by_handle(
357 struct file *parfilp,
358 void __user *arg)
359{
360 int error;
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
363 struct dentry *dentry;
364
365 if (!capable(CAP_MKNOD))
366 return -EPERM;
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 return -EFAULT;
369
370 error = mnt_want_write_file(parfilp);
371 if (error)
372 return error;
373
374 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
375 if (IS_ERR(dentry)) {
376 mnt_drop_write_file(parfilp);
377 return PTR_ERR(dentry);
378 }
379
380 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
381 error = -EPERM;
382 goto out;
383 }
384
385 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
386 error = -EFAULT;
387 goto out;
388 }
389
390 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
391 fsd.fsd_dmstate);
392
393 out:
394 mnt_drop_write_file(parfilp);
395 dput(dentry);
396 return error;
397}
398
399STATIC int
400xfs_attrlist_by_handle(
401 struct file *parfilp,
402 void __user *arg)
403{
404 int error = -ENOMEM;
405 attrlist_cursor_kern_t *cursor;
406 xfs_fsop_attrlist_handlereq_t al_hreq;
407 struct dentry *dentry;
408 char *kbuf;
409
410 if (!capable(CAP_SYS_ADMIN))
411 return -EPERM;
412 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
413 return -EFAULT;
414 if (al_hreq.buflen < sizeof(struct attrlist) ||
415 al_hreq.buflen > XFS_XATTR_LIST_MAX)
416 return -EINVAL;
417
418 /*
419 * Reject flags, only allow namespaces.
420 */
421 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
422 return -EINVAL;
423
424 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
425 if (IS_ERR(dentry))
426 return PTR_ERR(dentry);
427
428 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
429 if (!kbuf)
430 goto out_dput;
431
432 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
433 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
434 al_hreq.flags, cursor);
435 if (error)
436 goto out_kfree;
437
438 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
439 error = -EFAULT;
440
441out_kfree:
442 kmem_free(kbuf);
443out_dput:
444 dput(dentry);
445 return error;
446}
447
448int
449xfs_attrmulti_attr_get(
450 struct inode *inode,
451 unsigned char *name,
452 unsigned char __user *ubuf,
453 __uint32_t *len,
454 __uint32_t flags)
455{
456 unsigned char *kbuf;
457 int error = -EFAULT;
458
459 if (*len > XFS_XATTR_SIZE_MAX)
460 return -EINVAL;
461 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
462 if (!kbuf)
463 return -ENOMEM;
464
465 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
466 if (error)
467 goto out_kfree;
468
469 if (copy_to_user(ubuf, kbuf, *len))
470 error = -EFAULT;
471
472out_kfree:
473 kmem_free(kbuf);
474 return error;
475}
476
477int
478xfs_attrmulti_attr_set(
479 struct inode *inode,
480 unsigned char *name,
481 const unsigned char __user *ubuf,
482 __uint32_t len,
483 __uint32_t flags)
484{
485 unsigned char *kbuf;
486 int error;
487
488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
489 return -EPERM;
490 if (len > XFS_XATTR_SIZE_MAX)
491 return -EINVAL;
492
493 kbuf = memdup_user(ubuf, len);
494 if (IS_ERR(kbuf))
495 return PTR_ERR(kbuf);
496
497 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
498 if (!error)
499 xfs_forget_acl(inode, name, flags);
500 kfree(kbuf);
501 return error;
502}
503
504int
505xfs_attrmulti_attr_remove(
506 struct inode *inode,
507 unsigned char *name,
508 __uint32_t flags)
509{
510 int error;
511
512 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
513 return -EPERM;
514 error = xfs_attr_remove(XFS_I(inode), name, flags);
515 if (!error)
516 xfs_forget_acl(inode, name, flags);
517 return error;
518}
519
520STATIC int
521xfs_attrmulti_by_handle(
522 struct file *parfilp,
523 void __user *arg)
524{
525 int error;
526 xfs_attr_multiop_t *ops;
527 xfs_fsop_attrmulti_handlereq_t am_hreq;
528 struct dentry *dentry;
529 unsigned int i, size;
530 unsigned char *attr_name;
531
532 if (!capable(CAP_SYS_ADMIN))
533 return -EPERM;
534 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
535 return -EFAULT;
536
537 /* overflow check */
538 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
539 return -E2BIG;
540
541 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
542 if (IS_ERR(dentry))
543 return PTR_ERR(dentry);
544
545 error = -E2BIG;
546 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
547 if (!size || size > 16 * PAGE_SIZE)
548 goto out_dput;
549
550 ops = memdup_user(am_hreq.ops, size);
551 if (IS_ERR(ops)) {
552 error = PTR_ERR(ops);
553 goto out_dput;
554 }
555
556 error = -ENOMEM;
557 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
558 if (!attr_name)
559 goto out_kfree_ops;
560
561 error = 0;
562 for (i = 0; i < am_hreq.opcount; i++) {
563 ops[i].am_error = strncpy_from_user((char *)attr_name,
564 ops[i].am_attrname, MAXNAMELEN);
565 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
566 error = -ERANGE;
567 if (ops[i].am_error < 0)
568 break;
569
570 switch (ops[i].am_opcode) {
571 case ATTR_OP_GET:
572 ops[i].am_error = xfs_attrmulti_attr_get(
573 d_inode(dentry), attr_name,
574 ops[i].am_attrvalue, &ops[i].am_length,
575 ops[i].am_flags);
576 break;
577 case ATTR_OP_SET:
578 ops[i].am_error = mnt_want_write_file(parfilp);
579 if (ops[i].am_error)
580 break;
581 ops[i].am_error = xfs_attrmulti_attr_set(
582 d_inode(dentry), attr_name,
583 ops[i].am_attrvalue, ops[i].am_length,
584 ops[i].am_flags);
585 mnt_drop_write_file(parfilp);
586 break;
587 case ATTR_OP_REMOVE:
588 ops[i].am_error = mnt_want_write_file(parfilp);
589 if (ops[i].am_error)
590 break;
591 ops[i].am_error = xfs_attrmulti_attr_remove(
592 d_inode(dentry), attr_name,
593 ops[i].am_flags);
594 mnt_drop_write_file(parfilp);
595 break;
596 default:
597 ops[i].am_error = -EINVAL;
598 }
599 }
600
601 if (copy_to_user(am_hreq.ops, ops, size))
602 error = -EFAULT;
603
604 kfree(attr_name);
605 out_kfree_ops:
606 kfree(ops);
607 out_dput:
608 dput(dentry);
609 return error;
610}
611
612int
613xfs_ioc_space(
614 struct xfs_inode *ip,
615 struct inode *inode,
616 struct file *filp,
617 int ioflags,
618 unsigned int cmd,
619 xfs_flock64_t *bf)
620{
621 struct iattr iattr;
622 enum xfs_prealloc_flags flags = 0;
623 uint iolock = XFS_IOLOCK_EXCL;
624 int error;
625
626 /*
627 * Only allow the sys admin to reserve space unless
628 * unwritten extents are enabled.
629 */
630 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
631 !capable(CAP_SYS_ADMIN))
632 return -EPERM;
633
634 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
635 return -EPERM;
636
637 if (!(filp->f_mode & FMODE_WRITE))
638 return -EBADF;
639
640 if (!S_ISREG(inode->i_mode))
641 return -EINVAL;
642
643 if (filp->f_flags & O_DSYNC)
644 flags |= XFS_PREALLOC_SYNC;
645 if (ioflags & XFS_IO_INVIS)
646 flags |= XFS_PREALLOC_INVISIBLE;
647
648 error = mnt_want_write_file(filp);
649 if (error)
650 return error;
651
652 xfs_ilock(ip, iolock);
653 error = xfs_break_layouts(inode, &iolock, false);
654 if (error)
655 goto out_unlock;
656
657 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
658 iolock |= XFS_MMAPLOCK_EXCL;
659
660 switch (bf->l_whence) {
661 case 0: /*SEEK_SET*/
662 break;
663 case 1: /*SEEK_CUR*/
664 bf->l_start += filp->f_pos;
665 break;
666 case 2: /*SEEK_END*/
667 bf->l_start += XFS_ISIZE(ip);
668 break;
669 default:
670 error = -EINVAL;
671 goto out_unlock;
672 }
673
674 /*
675 * length of <= 0 for resv/unresv/zero is invalid. length for
676 * alloc/free is ignored completely and we have no idea what userspace
677 * might have set it to, so set it to zero to allow range
678 * checks to pass.
679 */
680 switch (cmd) {
681 case XFS_IOC_ZERO_RANGE:
682 case XFS_IOC_RESVSP:
683 case XFS_IOC_RESVSP64:
684 case XFS_IOC_UNRESVSP:
685 case XFS_IOC_UNRESVSP64:
686 if (bf->l_len <= 0) {
687 error = -EINVAL;
688 goto out_unlock;
689 }
690 break;
691 default:
692 bf->l_len = 0;
693 break;
694 }
695
696 if (bf->l_start < 0 ||
697 bf->l_start > inode->i_sb->s_maxbytes ||
698 bf->l_start + bf->l_len < 0 ||
699 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
700 error = -EINVAL;
701 goto out_unlock;
702 }
703
704 switch (cmd) {
705 case XFS_IOC_ZERO_RANGE:
706 flags |= XFS_PREALLOC_SET;
707 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
708 break;
709 case XFS_IOC_RESVSP:
710 case XFS_IOC_RESVSP64:
711 flags |= XFS_PREALLOC_SET;
712 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
713 XFS_BMAPI_PREALLOC);
714 break;
715 case XFS_IOC_UNRESVSP:
716 case XFS_IOC_UNRESVSP64:
717 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
718 break;
719 case XFS_IOC_ALLOCSP:
720 case XFS_IOC_ALLOCSP64:
721 case XFS_IOC_FREESP:
722 case XFS_IOC_FREESP64:
723 flags |= XFS_PREALLOC_CLEAR;
724 if (bf->l_start > XFS_ISIZE(ip)) {
725 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
726 bf->l_start - XFS_ISIZE(ip), 0);
727 if (error)
728 goto out_unlock;
729 }
730
731 iattr.ia_valid = ATTR_SIZE;
732 iattr.ia_size = bf->l_start;
733
734 error = xfs_setattr_size(ip, &iattr);
735 break;
736 default:
737 ASSERT(0);
738 error = -EINVAL;
739 }
740
741 if (error)
742 goto out_unlock;
743
744 error = xfs_update_prealloc_flags(ip, flags);
745
746out_unlock:
747 xfs_iunlock(ip, iolock);
748 mnt_drop_write_file(filp);
749 return error;
750}
751
752STATIC int
753xfs_ioc_bulkstat(
754 xfs_mount_t *mp,
755 unsigned int cmd,
756 void __user *arg)
757{
758 xfs_fsop_bulkreq_t bulkreq;
759 int count; /* # of records returned */
760 xfs_ino_t inlast; /* last inode number */
761 int done;
762 int error;
763
764 /* done = 1 if there are more stats to get and if bulkstat */
765 /* should be called again (unused here, but used in dmapi) */
766
767 if (!capable(CAP_SYS_ADMIN))
768 return -EPERM;
769
770 if (XFS_FORCED_SHUTDOWN(mp))
771 return -EIO;
772
773 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
774 return -EFAULT;
775
776 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
777 return -EFAULT;
778
779 if ((count = bulkreq.icount) <= 0)
780 return -EINVAL;
781
782 if (bulkreq.ubuffer == NULL)
783 return -EINVAL;
784
785 if (cmd == XFS_IOC_FSINUMBERS)
786 error = xfs_inumbers(mp, &inlast, &count,
787 bulkreq.ubuffer, xfs_inumbers_fmt);
788 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
789 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
790 sizeof(xfs_bstat_t), NULL, &done);
791 else /* XFS_IOC_FSBULKSTAT */
792 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
793 sizeof(xfs_bstat_t), bulkreq.ubuffer,
794 &done);
795
796 if (error)
797 return error;
798
799 if (bulkreq.ocount != NULL) {
800 if (copy_to_user(bulkreq.lastip, &inlast,
801 sizeof(xfs_ino_t)))
802 return -EFAULT;
803
804 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
805 return -EFAULT;
806 }
807
808 return 0;
809}
810
811STATIC int
812xfs_ioc_fsgeometry_v1(
813 xfs_mount_t *mp,
814 void __user *arg)
815{
816 xfs_fsop_geom_t fsgeo;
817 int error;
818
819 error = xfs_fs_geometry(mp, &fsgeo, 3);
820 if (error)
821 return error;
822
823 /*
824 * Caller should have passed an argument of type
825 * xfs_fsop_geom_v1_t. This is a proper subset of the
826 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
827 */
828 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
829 return -EFAULT;
830 return 0;
831}
832
833STATIC int
834xfs_ioc_fsgeometry(
835 xfs_mount_t *mp,
836 void __user *arg)
837{
838 xfs_fsop_geom_t fsgeo;
839 int error;
840
841 error = xfs_fs_geometry(mp, &fsgeo, 4);
842 if (error)
843 return error;
844
845 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
846 return -EFAULT;
847 return 0;
848}
849
850/*
851 * Linux extended inode flags interface.
852 */
853
854STATIC unsigned int
855xfs_merge_ioc_xflags(
856 unsigned int flags,
857 unsigned int start)
858{
859 unsigned int xflags = start;
860
861 if (flags & FS_IMMUTABLE_FL)
862 xflags |= FS_XFLAG_IMMUTABLE;
863 else
864 xflags &= ~FS_XFLAG_IMMUTABLE;
865 if (flags & FS_APPEND_FL)
866 xflags |= FS_XFLAG_APPEND;
867 else
868 xflags &= ~FS_XFLAG_APPEND;
869 if (flags & FS_SYNC_FL)
870 xflags |= FS_XFLAG_SYNC;
871 else
872 xflags &= ~FS_XFLAG_SYNC;
873 if (flags & FS_NOATIME_FL)
874 xflags |= FS_XFLAG_NOATIME;
875 else
876 xflags &= ~FS_XFLAG_NOATIME;
877 if (flags & FS_NODUMP_FL)
878 xflags |= FS_XFLAG_NODUMP;
879 else
880 xflags &= ~FS_XFLAG_NODUMP;
881
882 return xflags;
883}
884
885STATIC unsigned int
886xfs_di2lxflags(
887 __uint16_t di_flags)
888{
889 unsigned int flags = 0;
890
891 if (di_flags & XFS_DIFLAG_IMMUTABLE)
892 flags |= FS_IMMUTABLE_FL;
893 if (di_flags & XFS_DIFLAG_APPEND)
894 flags |= FS_APPEND_FL;
895 if (di_flags & XFS_DIFLAG_SYNC)
896 flags |= FS_SYNC_FL;
897 if (di_flags & XFS_DIFLAG_NOATIME)
898 flags |= FS_NOATIME_FL;
899 if (di_flags & XFS_DIFLAG_NODUMP)
900 flags |= FS_NODUMP_FL;
901 return flags;
902}
903
904STATIC int
905xfs_ioc_fsgetxattr(
906 xfs_inode_t *ip,
907 int attr,
908 void __user *arg)
909{
910 struct fsxattr fa;
911
912 memset(&fa, 0, sizeof(struct fsxattr));
913
914 xfs_ilock(ip, XFS_ILOCK_SHARED);
915 fa.fsx_xflags = xfs_ip2xflags(ip);
916 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
917 fa.fsx_projid = xfs_get_projid(ip);
918
919 if (attr) {
920 if (ip->i_afp) {
921 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
922 fa.fsx_nextents = ip->i_afp->if_bytes /
923 sizeof(xfs_bmbt_rec_t);
924 else
925 fa.fsx_nextents = ip->i_d.di_anextents;
926 } else
927 fa.fsx_nextents = 0;
928 } else {
929 if (ip->i_df.if_flags & XFS_IFEXTENTS)
930 fa.fsx_nextents = ip->i_df.if_bytes /
931 sizeof(xfs_bmbt_rec_t);
932 else
933 fa.fsx_nextents = ip->i_d.di_nextents;
934 }
935 xfs_iunlock(ip, XFS_ILOCK_SHARED);
936
937 if (copy_to_user(arg, &fa, sizeof(fa)))
938 return -EFAULT;
939 return 0;
940}
941
942STATIC void
943xfs_set_diflags(
944 struct xfs_inode *ip,
945 unsigned int xflags)
946{
947 unsigned int di_flags;
948 uint64_t di_flags2;
949
950 /* can't set PREALLOC this way, just preserve it */
951 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
952 if (xflags & FS_XFLAG_IMMUTABLE)
953 di_flags |= XFS_DIFLAG_IMMUTABLE;
954 if (xflags & FS_XFLAG_APPEND)
955 di_flags |= XFS_DIFLAG_APPEND;
956 if (xflags & FS_XFLAG_SYNC)
957 di_flags |= XFS_DIFLAG_SYNC;
958 if (xflags & FS_XFLAG_NOATIME)
959 di_flags |= XFS_DIFLAG_NOATIME;
960 if (xflags & FS_XFLAG_NODUMP)
961 di_flags |= XFS_DIFLAG_NODUMP;
962 if (xflags & FS_XFLAG_NODEFRAG)
963 di_flags |= XFS_DIFLAG_NODEFRAG;
964 if (xflags & FS_XFLAG_FILESTREAM)
965 di_flags |= XFS_DIFLAG_FILESTREAM;
966 if (S_ISDIR(VFS_I(ip)->i_mode)) {
967 if (xflags & FS_XFLAG_RTINHERIT)
968 di_flags |= XFS_DIFLAG_RTINHERIT;
969 if (xflags & FS_XFLAG_NOSYMLINKS)
970 di_flags |= XFS_DIFLAG_NOSYMLINKS;
971 if (xflags & FS_XFLAG_EXTSZINHERIT)
972 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
973 if (xflags & FS_XFLAG_PROJINHERIT)
974 di_flags |= XFS_DIFLAG_PROJINHERIT;
975 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
976 if (xflags & FS_XFLAG_REALTIME)
977 di_flags |= XFS_DIFLAG_REALTIME;
978 if (xflags & FS_XFLAG_EXTSIZE)
979 di_flags |= XFS_DIFLAG_EXTSIZE;
980 }
981 ip->i_d.di_flags = di_flags;
982
983 /* diflags2 only valid for v3 inodes. */
984 if (ip->i_d.di_version < 3)
985 return;
986
987 di_flags2 = 0;
988 if (xflags & FS_XFLAG_DAX)
989 di_flags2 |= XFS_DIFLAG2_DAX;
990
991 ip->i_d.di_flags2 = di_flags2;
992
993}
994
995STATIC void
996xfs_diflags_to_linux(
997 struct xfs_inode *ip)
998{
999 struct inode *inode = VFS_I(ip);
1000 unsigned int xflags = xfs_ip2xflags(ip);
1001
1002 if (xflags & FS_XFLAG_IMMUTABLE)
1003 inode->i_flags |= S_IMMUTABLE;
1004 else
1005 inode->i_flags &= ~S_IMMUTABLE;
1006 if (xflags & FS_XFLAG_APPEND)
1007 inode->i_flags |= S_APPEND;
1008 else
1009 inode->i_flags &= ~S_APPEND;
1010 if (xflags & FS_XFLAG_SYNC)
1011 inode->i_flags |= S_SYNC;
1012 else
1013 inode->i_flags &= ~S_SYNC;
1014 if (xflags & FS_XFLAG_NOATIME)
1015 inode->i_flags |= S_NOATIME;
1016 else
1017 inode->i_flags &= ~S_NOATIME;
1018 if (xflags & FS_XFLAG_DAX)
1019 inode->i_flags |= S_DAX;
1020 else
1021 inode->i_flags &= ~S_DAX;
1022
1023}
1024
1025static int
1026xfs_ioctl_setattr_xflags(
1027 struct xfs_trans *tp,
1028 struct xfs_inode *ip,
1029 struct fsxattr *fa)
1030{
1031 struct xfs_mount *mp = ip->i_mount;
1032
1033 /* Can't change realtime flag if any extents are allocated. */
1034 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1035 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1036 return -EINVAL;
1037
1038 /* If realtime flag is set then must have realtime device */
1039 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1040 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1041 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1042 return -EINVAL;
1043 }
1044
1045 /*
1046 * Can't modify an immutable/append-only file unless
1047 * we have appropriate permission.
1048 */
1049 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1050 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1051 !capable(CAP_LINUX_IMMUTABLE))
1052 return -EPERM;
1053
1054 xfs_set_diflags(ip, fa->fsx_xflags);
1055 xfs_diflags_to_linux(ip);
1056 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1057 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1058 XFS_STATS_INC(mp, xs_ig_attrchg);
1059 return 0;
1060}
1061
1062/*
1063 * If we are changing DAX flags, we have to ensure the file is clean and any
1064 * cached objects in the address space are invalidated and removed. This
1065 * requires us to lock out other IO and page faults similar to a truncate
1066 * operation. The locks need to be held until the transaction has been committed
1067 * so that the cache invalidation is atomic with respect to the DAX flag
1068 * manipulation.
1069 */
1070static int
1071xfs_ioctl_setattr_dax_invalidate(
1072 struct xfs_inode *ip,
1073 struct fsxattr *fa,
1074 int *join_flags)
1075{
1076 struct inode *inode = VFS_I(ip);
1077 int error;
1078
1079 *join_flags = 0;
1080
1081 /*
1082 * It is only valid to set the DAX flag on regular files and
1083 * directories on filesystems where the block size is equal to the page
1084 * size. On directories it serves as an inherit hint.
1085 */
1086 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1087 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1088 return -EINVAL;
1089 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1090 return -EINVAL;
1091 }
1092
1093 /* If the DAX state is not changing, we have nothing to do here. */
1094 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1095 return 0;
1096 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1097 return 0;
1098
1099 /* lock, flush and invalidate mapping in preparation for flag change */
1100 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1101 error = filemap_write_and_wait(inode->i_mapping);
1102 if (error)
1103 goto out_unlock;
1104 error = invalidate_inode_pages2(inode->i_mapping);
1105 if (error)
1106 goto out_unlock;
1107
1108 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1109 return 0;
1110
1111out_unlock:
1112 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1113 return error;
1114
1115}
1116
1117/*
1118 * Set up the transaction structure for the setattr operation, checking that we
1119 * have permission to do so. On success, return a clean transaction and the
1120 * inode locked exclusively ready for further operation specific checks. On
1121 * failure, return an error without modifying or locking the inode.
1122 *
1123 * The inode might already be IO locked on call. If this is the case, it is
1124 * indicated in @join_flags and we take full responsibility for ensuring they
1125 * are unlocked from now on. Hence if we have an error here, we still have to
1126 * unlock them. Otherwise, once they are joined to the transaction, they will
1127 * be unlocked on commit/cancel.
1128 */
1129static struct xfs_trans *
1130xfs_ioctl_setattr_get_trans(
1131 struct xfs_inode *ip,
1132 int join_flags)
1133{
1134 struct xfs_mount *mp = ip->i_mount;
1135 struct xfs_trans *tp;
1136 int error = -EROFS;
1137
1138 if (mp->m_flags & XFS_MOUNT_RDONLY)
1139 goto out_unlock;
1140 error = -EIO;
1141 if (XFS_FORCED_SHUTDOWN(mp))
1142 goto out_unlock;
1143
1144 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1145 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1146 if (error)
1147 goto out_cancel;
1148
1149 xfs_ilock(ip, XFS_ILOCK_EXCL);
1150 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1151 join_flags = 0;
1152
1153 /*
1154 * CAP_FOWNER overrides the following restrictions:
1155 *
1156 * The user ID of the calling process must be equal to the file owner
1157 * ID, except in cases where the CAP_FSETID capability is applicable.
1158 */
1159 if (!inode_owner_or_capable(VFS_I(ip))) {
1160 error = -EPERM;
1161 goto out_cancel;
1162 }
1163
1164 if (mp->m_flags & XFS_MOUNT_WSYNC)
1165 xfs_trans_set_sync(tp);
1166
1167 return tp;
1168
1169out_cancel:
1170 xfs_trans_cancel(tp);
1171out_unlock:
1172 if (join_flags)
1173 xfs_iunlock(ip, join_flags);
1174 return ERR_PTR(error);
1175}
1176
1177/*
1178 * extent size hint validation is somewhat cumbersome. Rules are:
1179 *
1180 * 1. extent size hint is only valid for directories and regular files
1181 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1182 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1183 * 4. can only be changed on regular files if no extents are allocated
1184 * 5. can be changed on directories at any time
1185 * 6. extsize hint of 0 turns off hints, clears inode flags.
1186 * 7. Extent size must be a multiple of the appropriate block size.
1187 * 8. for non-realtime files, the extent size hint must be limited
1188 * to half the AG size to avoid alignment extending the extent beyond the
1189 * limits of the AG.
1190 */
1191static int
1192xfs_ioctl_setattr_check_extsize(
1193 struct xfs_inode *ip,
1194 struct fsxattr *fa)
1195{
1196 struct xfs_mount *mp = ip->i_mount;
1197
1198 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1199 return -EINVAL;
1200
1201 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1202 !S_ISDIR(VFS_I(ip)->i_mode))
1203 return -EINVAL;
1204
1205 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1206 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1207 return -EINVAL;
1208
1209 if (fa->fsx_extsize != 0) {
1210 xfs_extlen_t size;
1211 xfs_fsblock_t extsize_fsb;
1212
1213 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1214 if (extsize_fsb > MAXEXTLEN)
1215 return -EINVAL;
1216
1217 if (XFS_IS_REALTIME_INODE(ip) ||
1218 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1219 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1220 } else {
1221 size = mp->m_sb.sb_blocksize;
1222 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1223 return -EINVAL;
1224 }
1225
1226 if (fa->fsx_extsize % size)
1227 return -EINVAL;
1228 } else
1229 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1230
1231 return 0;
1232}
1233
1234static int
1235xfs_ioctl_setattr_check_projid(
1236 struct xfs_inode *ip,
1237 struct fsxattr *fa)
1238{
1239 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1240 if (fa->fsx_projid > (__uint16_t)-1 &&
1241 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1242 return -EINVAL;
1243
1244 /*
1245 * Project Quota ID state is only allowed to change from within the init
1246 * namespace. Enforce that restriction only if we are trying to change
1247 * the quota ID state. Everything else is allowed in user namespaces.
1248 */
1249 if (current_user_ns() == &init_user_ns)
1250 return 0;
1251
1252 if (xfs_get_projid(ip) != fa->fsx_projid)
1253 return -EINVAL;
1254 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1255 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1256 return -EINVAL;
1257
1258 return 0;
1259}
1260
1261STATIC int
1262xfs_ioctl_setattr(
1263 xfs_inode_t *ip,
1264 struct fsxattr *fa)
1265{
1266 struct xfs_mount *mp = ip->i_mount;
1267 struct xfs_trans *tp;
1268 struct xfs_dquot *udqp = NULL;
1269 struct xfs_dquot *pdqp = NULL;
1270 struct xfs_dquot *olddquot = NULL;
1271 int code;
1272 int join_flags = 0;
1273
1274 trace_xfs_ioctl_setattr(ip);
1275
1276 code = xfs_ioctl_setattr_check_projid(ip, fa);
1277 if (code)
1278 return code;
1279
1280 /*
1281 * If disk quotas is on, we make sure that the dquots do exist on disk,
1282 * before we start any other transactions. Trying to do this later
1283 * is messy. We don't care to take a readlock to look at the ids
1284 * in inode here, because we can't hold it across the trans_reserve.
1285 * If the IDs do change before we take the ilock, we're covered
1286 * because the i_*dquot fields will get updated anyway.
1287 */
1288 if (XFS_IS_QUOTA_ON(mp)) {
1289 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1290 ip->i_d.di_gid, fa->fsx_projid,
1291 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1292 if (code)
1293 return code;
1294 }
1295
1296 /*
1297 * Changing DAX config may require inode locking for mapping
1298 * invalidation. These need to be held all the way to transaction commit
1299 * or cancel time, so need to be passed through to
1300 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1301 * appropriately.
1302 */
1303 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1304 if (code)
1305 goto error_free_dquots;
1306
1307 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1308 if (IS_ERR(tp)) {
1309 code = PTR_ERR(tp);
1310 goto error_free_dquots;
1311 }
1312
1313
1314 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1315 xfs_get_projid(ip) != fa->fsx_projid) {
1316 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1317 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1318 if (code) /* out of quota */
1319 goto error_trans_cancel;
1320 }
1321
1322 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1323 if (code)
1324 goto error_trans_cancel;
1325
1326 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1327 if (code)
1328 goto error_trans_cancel;
1329
1330 /*
1331 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1332 * overrides the following restrictions:
1333 *
1334 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1335 * successful return from chown()
1336 */
1337
1338 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1339 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1340 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1341
1342 /* Change the ownerships and register project quota modifications */
1343 if (xfs_get_projid(ip) != fa->fsx_projid) {
1344 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1345 olddquot = xfs_qm_vop_chown(tp, ip,
1346 &ip->i_pdquot, pdqp);
1347 }
1348 ASSERT(ip->i_d.di_version > 1);
1349 xfs_set_projid(ip, fa->fsx_projid);
1350 }
1351
1352 /*
1353 * Only set the extent size hint if we've already determined that the
1354 * extent size hint should be set on the inode. If no extent size flags
1355 * are set on the inode then unconditionally clear the extent size hint.
1356 */
1357 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1358 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1359 else
1360 ip->i_d.di_extsize = 0;
1361
1362 code = xfs_trans_commit(tp);
1363
1364 /*
1365 * Release any dquot(s) the inode had kept before chown.
1366 */
1367 xfs_qm_dqrele(olddquot);
1368 xfs_qm_dqrele(udqp);
1369 xfs_qm_dqrele(pdqp);
1370
1371 return code;
1372
1373error_trans_cancel:
1374 xfs_trans_cancel(tp);
1375error_free_dquots:
1376 xfs_qm_dqrele(udqp);
1377 xfs_qm_dqrele(pdqp);
1378 return code;
1379}
1380
1381STATIC int
1382xfs_ioc_fssetxattr(
1383 xfs_inode_t *ip,
1384 struct file *filp,
1385 void __user *arg)
1386{
1387 struct fsxattr fa;
1388 int error;
1389
1390 if (copy_from_user(&fa, arg, sizeof(fa)))
1391 return -EFAULT;
1392
1393 error = mnt_want_write_file(filp);
1394 if (error)
1395 return error;
1396 error = xfs_ioctl_setattr(ip, &fa);
1397 mnt_drop_write_file(filp);
1398 return error;
1399}
1400
1401STATIC int
1402xfs_ioc_getxflags(
1403 xfs_inode_t *ip,
1404 void __user *arg)
1405{
1406 unsigned int flags;
1407
1408 flags = xfs_di2lxflags(ip->i_d.di_flags);
1409 if (copy_to_user(arg, &flags, sizeof(flags)))
1410 return -EFAULT;
1411 return 0;
1412}
1413
1414STATIC int
1415xfs_ioc_setxflags(
1416 struct xfs_inode *ip,
1417 struct file *filp,
1418 void __user *arg)
1419{
1420 struct xfs_trans *tp;
1421 struct fsxattr fa;
1422 unsigned int flags;
1423 int join_flags = 0;
1424 int error;
1425
1426 if (copy_from_user(&flags, arg, sizeof(flags)))
1427 return -EFAULT;
1428
1429 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1430 FS_NOATIME_FL | FS_NODUMP_FL | \
1431 FS_SYNC_FL))
1432 return -EOPNOTSUPP;
1433
1434 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1435
1436 error = mnt_want_write_file(filp);
1437 if (error)
1438 return error;
1439
1440 /*
1441 * Changing DAX config may require inode locking for mapping
1442 * invalidation. These need to be held all the way to transaction commit
1443 * or cancel time, so need to be passed through to
1444 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1445 * appropriately.
1446 */
1447 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1448 if (error)
1449 goto out_drop_write;
1450
1451 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1452 if (IS_ERR(tp)) {
1453 error = PTR_ERR(tp);
1454 goto out_drop_write;
1455 }
1456
1457 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1458 if (error) {
1459 xfs_trans_cancel(tp);
1460 goto out_drop_write;
1461 }
1462
1463 error = xfs_trans_commit(tp);
1464out_drop_write:
1465 mnt_drop_write_file(filp);
1466 return error;
1467}
1468
1469STATIC int
1470xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1471{
1472 struct getbmap __user *base = (struct getbmap __user *)*ap;
1473
1474 /* copy only getbmap portion (not getbmapx) */
1475 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1476 return -EFAULT;
1477
1478 *ap += sizeof(struct getbmap);
1479 return 0;
1480}
1481
1482STATIC int
1483xfs_ioc_getbmap(
1484 struct xfs_inode *ip,
1485 int ioflags,
1486 unsigned int cmd,
1487 void __user *arg)
1488{
1489 struct getbmapx bmx;
1490 int error;
1491
1492 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1493 return -EFAULT;
1494
1495 if (bmx.bmv_count < 2)
1496 return -EINVAL;
1497
1498 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1499 if (ioflags & XFS_IO_INVIS)
1500 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1501
1502 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1503 (__force struct getbmap *)arg+1);
1504 if (error)
1505 return error;
1506
1507 /* copy back header - only size of getbmap */
1508 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1509 return -EFAULT;
1510 return 0;
1511}
1512
1513STATIC int
1514xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1515{
1516 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1517
1518 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1519 return -EFAULT;
1520
1521 *ap += sizeof(struct getbmapx);
1522 return 0;
1523}
1524
1525STATIC int
1526xfs_ioc_getbmapx(
1527 struct xfs_inode *ip,
1528 void __user *arg)
1529{
1530 struct getbmapx bmx;
1531 int error;
1532
1533 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1534 return -EFAULT;
1535
1536 if (bmx.bmv_count < 2)
1537 return -EINVAL;
1538
1539 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1540 return -EINVAL;
1541
1542 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1543 (__force struct getbmapx *)arg+1);
1544 if (error)
1545 return error;
1546
1547 /* copy back header */
1548 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1549 return -EFAULT;
1550
1551 return 0;
1552}
1553
1554int
1555xfs_ioc_swapext(
1556 xfs_swapext_t *sxp)
1557{
1558 xfs_inode_t *ip, *tip;
1559 struct fd f, tmp;
1560 int error = 0;
1561
1562 /* Pull information for the target fd */
1563 f = fdget((int)sxp->sx_fdtarget);
1564 if (!f.file) {
1565 error = -EINVAL;
1566 goto out;
1567 }
1568
1569 if (!(f.file->f_mode & FMODE_WRITE) ||
1570 !(f.file->f_mode & FMODE_READ) ||
1571 (f.file->f_flags & O_APPEND)) {
1572 error = -EBADF;
1573 goto out_put_file;
1574 }
1575
1576 tmp = fdget((int)sxp->sx_fdtmp);
1577 if (!tmp.file) {
1578 error = -EINVAL;
1579 goto out_put_file;
1580 }
1581
1582 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1583 !(tmp.file->f_mode & FMODE_READ) ||
1584 (tmp.file->f_flags & O_APPEND)) {
1585 error = -EBADF;
1586 goto out_put_tmp_file;
1587 }
1588
1589 if (IS_SWAPFILE(file_inode(f.file)) ||
1590 IS_SWAPFILE(file_inode(tmp.file))) {
1591 error = -EINVAL;
1592 goto out_put_tmp_file;
1593 }
1594
1595 ip = XFS_I(file_inode(f.file));
1596 tip = XFS_I(file_inode(tmp.file));
1597
1598 if (ip->i_mount != tip->i_mount) {
1599 error = -EINVAL;
1600 goto out_put_tmp_file;
1601 }
1602
1603 if (ip->i_ino == tip->i_ino) {
1604 error = -EINVAL;
1605 goto out_put_tmp_file;
1606 }
1607
1608 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1609 error = -EIO;
1610 goto out_put_tmp_file;
1611 }
1612
1613 error = xfs_swap_extents(ip, tip, sxp);
1614
1615 out_put_tmp_file:
1616 fdput(tmp);
1617 out_put_file:
1618 fdput(f);
1619 out:
1620 return error;
1621}
1622
1623/*
1624 * Note: some of the ioctl's return positive numbers as a
1625 * byte count indicating success, such as readlink_by_handle.
1626 * So we don't "sign flip" like most other routines. This means
1627 * true errors need to be returned as a negative value.
1628 */
1629long
1630xfs_file_ioctl(
1631 struct file *filp,
1632 unsigned int cmd,
1633 unsigned long p)
1634{
1635 struct inode *inode = file_inode(filp);
1636 struct xfs_inode *ip = XFS_I(inode);
1637 struct xfs_mount *mp = ip->i_mount;
1638 void __user *arg = (void __user *)p;
1639 int ioflags = 0;
1640 int error;
1641
1642 if (filp->f_mode & FMODE_NOCMTIME)
1643 ioflags |= XFS_IO_INVIS;
1644
1645 trace_xfs_file_ioctl(ip);
1646
1647 switch (cmd) {
1648 case FITRIM:
1649 return xfs_ioc_trim(mp, arg);
1650 case XFS_IOC_ALLOCSP:
1651 case XFS_IOC_FREESP:
1652 case XFS_IOC_RESVSP:
1653 case XFS_IOC_UNRESVSP:
1654 case XFS_IOC_ALLOCSP64:
1655 case XFS_IOC_FREESP64:
1656 case XFS_IOC_RESVSP64:
1657 case XFS_IOC_UNRESVSP64:
1658 case XFS_IOC_ZERO_RANGE: {
1659 xfs_flock64_t bf;
1660
1661 if (copy_from_user(&bf, arg, sizeof(bf)))
1662 return -EFAULT;
1663 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1664 }
1665 case XFS_IOC_DIOINFO: {
1666 struct dioattr da;
1667 xfs_buftarg_t *target =
1668 XFS_IS_REALTIME_INODE(ip) ?
1669 mp->m_rtdev_targp : mp->m_ddev_targp;
1670
1671 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1672 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1673
1674 if (copy_to_user(arg, &da, sizeof(da)))
1675 return -EFAULT;
1676 return 0;
1677 }
1678
1679 case XFS_IOC_FSBULKSTAT_SINGLE:
1680 case XFS_IOC_FSBULKSTAT:
1681 case XFS_IOC_FSINUMBERS:
1682 return xfs_ioc_bulkstat(mp, cmd, arg);
1683
1684 case XFS_IOC_FSGEOMETRY_V1:
1685 return xfs_ioc_fsgeometry_v1(mp, arg);
1686
1687 case XFS_IOC_FSGEOMETRY:
1688 return xfs_ioc_fsgeometry(mp, arg);
1689
1690 case XFS_IOC_GETVERSION:
1691 return put_user(inode->i_generation, (int __user *)arg);
1692
1693 case XFS_IOC_FSGETXATTR:
1694 return xfs_ioc_fsgetxattr(ip, 0, arg);
1695 case XFS_IOC_FSGETXATTRA:
1696 return xfs_ioc_fsgetxattr(ip, 1, arg);
1697 case XFS_IOC_FSSETXATTR:
1698 return xfs_ioc_fssetxattr(ip, filp, arg);
1699 case XFS_IOC_GETXFLAGS:
1700 return xfs_ioc_getxflags(ip, arg);
1701 case XFS_IOC_SETXFLAGS:
1702 return xfs_ioc_setxflags(ip, filp, arg);
1703
1704 case XFS_IOC_FSSETDM: {
1705 struct fsdmidata dmi;
1706
1707 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1708 return -EFAULT;
1709
1710 error = mnt_want_write_file(filp);
1711 if (error)
1712 return error;
1713
1714 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1715 dmi.fsd_dmstate);
1716 mnt_drop_write_file(filp);
1717 return error;
1718 }
1719
1720 case XFS_IOC_GETBMAP:
1721 case XFS_IOC_GETBMAPA:
1722 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1723
1724 case XFS_IOC_GETBMAPX:
1725 return xfs_ioc_getbmapx(ip, arg);
1726
1727 case XFS_IOC_FD_TO_HANDLE:
1728 case XFS_IOC_PATH_TO_HANDLE:
1729 case XFS_IOC_PATH_TO_FSHANDLE: {
1730 xfs_fsop_handlereq_t hreq;
1731
1732 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1733 return -EFAULT;
1734 return xfs_find_handle(cmd, &hreq);
1735 }
1736 case XFS_IOC_OPEN_BY_HANDLE: {
1737 xfs_fsop_handlereq_t hreq;
1738
1739 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1740 return -EFAULT;
1741 return xfs_open_by_handle(filp, &hreq);
1742 }
1743 case XFS_IOC_FSSETDM_BY_HANDLE:
1744 return xfs_fssetdm_by_handle(filp, arg);
1745
1746 case XFS_IOC_READLINK_BY_HANDLE: {
1747 xfs_fsop_handlereq_t hreq;
1748
1749 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1750 return -EFAULT;
1751 return xfs_readlink_by_handle(filp, &hreq);
1752 }
1753 case XFS_IOC_ATTRLIST_BY_HANDLE:
1754 return xfs_attrlist_by_handle(filp, arg);
1755
1756 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1757 return xfs_attrmulti_by_handle(filp, arg);
1758
1759 case XFS_IOC_SWAPEXT: {
1760 struct xfs_swapext sxp;
1761
1762 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1763 return -EFAULT;
1764 error = mnt_want_write_file(filp);
1765 if (error)
1766 return error;
1767 error = xfs_ioc_swapext(&sxp);
1768 mnt_drop_write_file(filp);
1769 return error;
1770 }
1771
1772 case XFS_IOC_FSCOUNTS: {
1773 xfs_fsop_counts_t out;
1774
1775 error = xfs_fs_counts(mp, &out);
1776 if (error)
1777 return error;
1778
1779 if (copy_to_user(arg, &out, sizeof(out)))
1780 return -EFAULT;
1781 return 0;
1782 }
1783
1784 case XFS_IOC_SET_RESBLKS: {
1785 xfs_fsop_resblks_t inout;
1786 __uint64_t in;
1787
1788 if (!capable(CAP_SYS_ADMIN))
1789 return -EPERM;
1790
1791 if (mp->m_flags & XFS_MOUNT_RDONLY)
1792 return -EROFS;
1793
1794 if (copy_from_user(&inout, arg, sizeof(inout)))
1795 return -EFAULT;
1796
1797 error = mnt_want_write_file(filp);
1798 if (error)
1799 return error;
1800
1801 /* input parameter is passed in resblks field of structure */
1802 in = inout.resblks;
1803 error = xfs_reserve_blocks(mp, &in, &inout);
1804 mnt_drop_write_file(filp);
1805 if (error)
1806 return error;
1807
1808 if (copy_to_user(arg, &inout, sizeof(inout)))
1809 return -EFAULT;
1810 return 0;
1811 }
1812
1813 case XFS_IOC_GET_RESBLKS: {
1814 xfs_fsop_resblks_t out;
1815
1816 if (!capable(CAP_SYS_ADMIN))
1817 return -EPERM;
1818
1819 error = xfs_reserve_blocks(mp, NULL, &out);
1820 if (error)
1821 return error;
1822
1823 if (copy_to_user(arg, &out, sizeof(out)))
1824 return -EFAULT;
1825
1826 return 0;
1827 }
1828
1829 case XFS_IOC_FSGROWFSDATA: {
1830 xfs_growfs_data_t in;
1831
1832 if (copy_from_user(&in, arg, sizeof(in)))
1833 return -EFAULT;
1834
1835 error = mnt_want_write_file(filp);
1836 if (error)
1837 return error;
1838 error = xfs_growfs_data(mp, &in);
1839 mnt_drop_write_file(filp);
1840 return error;
1841 }
1842
1843 case XFS_IOC_FSGROWFSLOG: {
1844 xfs_growfs_log_t in;
1845
1846 if (copy_from_user(&in, arg, sizeof(in)))
1847 return -EFAULT;
1848
1849 error = mnt_want_write_file(filp);
1850 if (error)
1851 return error;
1852 error = xfs_growfs_log(mp, &in);
1853 mnt_drop_write_file(filp);
1854 return error;
1855 }
1856
1857 case XFS_IOC_FSGROWFSRT: {
1858 xfs_growfs_rt_t in;
1859
1860 if (copy_from_user(&in, arg, sizeof(in)))
1861 return -EFAULT;
1862
1863 error = mnt_want_write_file(filp);
1864 if (error)
1865 return error;
1866 error = xfs_growfs_rt(mp, &in);
1867 mnt_drop_write_file(filp);
1868 return error;
1869 }
1870
1871 case XFS_IOC_GOINGDOWN: {
1872 __uint32_t in;
1873
1874 if (!capable(CAP_SYS_ADMIN))
1875 return -EPERM;
1876
1877 if (get_user(in, (__uint32_t __user *)arg))
1878 return -EFAULT;
1879
1880 return xfs_fs_goingdown(mp, in);
1881 }
1882
1883 case XFS_IOC_ERROR_INJECTION: {
1884 xfs_error_injection_t in;
1885
1886 if (!capable(CAP_SYS_ADMIN))
1887 return -EPERM;
1888
1889 if (copy_from_user(&in, arg, sizeof(in)))
1890 return -EFAULT;
1891
1892 return xfs_errortag_add(in.errtag, mp);
1893 }
1894
1895 case XFS_IOC_ERROR_CLEARALL:
1896 if (!capable(CAP_SYS_ADMIN))
1897 return -EPERM;
1898
1899 return xfs_errortag_clearall(mp, 1);
1900
1901 case XFS_IOC_FREE_EOFBLOCKS: {
1902 struct xfs_fs_eofblocks eofb;
1903 struct xfs_eofblocks keofb;
1904
1905 if (!capable(CAP_SYS_ADMIN))
1906 return -EPERM;
1907
1908 if (mp->m_flags & XFS_MOUNT_RDONLY)
1909 return -EROFS;
1910
1911 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1912 return -EFAULT;
1913
1914 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1915 if (error)
1916 return error;
1917
1918 return xfs_icache_free_eofblocks(mp, &keofb);
1919 }
1920
1921 default:
1922 return -ENOTTY;
1923 }
1924}