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Merge tag 'md/3.14' of git://neil.brown.name/md
[mirror_ubuntu-bionic-kernel.git] / fs / xfs / xfs_ioctl.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_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 */
65 int
66 xfs_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 */
143 STATIC int
144 xfs_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 */
154 struct dentry *
155 xfs_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
186 STATIC struct dentry *
187 xfs_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
194 int
195 xfs_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
274 /*
275 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
276 * unused first argument.
277 */
278 STATIC int
279 do_readlink(
280 char __user *buffer,
281 int buflen,
282 const char *link)
283 {
284 int len;
285
286 len = PTR_ERR(link);
287 if (IS_ERR(link))
288 goto out;
289
290 len = strlen(link);
291 if (len > (unsigned) buflen)
292 len = buflen;
293 if (copy_to_user(buffer, link, len))
294 len = -EFAULT;
295 out:
296 return len;
297 }
298
299
300 int
301 xfs_readlink_by_handle(
302 struct file *parfilp,
303 xfs_fsop_handlereq_t *hreq)
304 {
305 struct dentry *dentry;
306 __u32 olen;
307 void *link;
308 int error;
309
310 if (!capable(CAP_SYS_ADMIN))
311 return -XFS_ERROR(EPERM);
312
313 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
314 if (IS_ERR(dentry))
315 return PTR_ERR(dentry);
316
317 /* Restrict this handle operation to symlinks only. */
318 if (!S_ISLNK(dentry->d_inode->i_mode)) {
319 error = -XFS_ERROR(EINVAL);
320 goto out_dput;
321 }
322
323 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
324 error = -XFS_ERROR(EFAULT);
325 goto out_dput;
326 }
327
328 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
329 if (!link) {
330 error = -XFS_ERROR(ENOMEM);
331 goto out_dput;
332 }
333
334 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
335 if (error)
336 goto out_kfree;
337 error = do_readlink(hreq->ohandle, olen, link);
338 if (error)
339 goto out_kfree;
340
341 out_kfree:
342 kfree(link);
343 out_dput:
344 dput(dentry);
345 return error;
346 }
347
348 int
349 xfs_set_dmattrs(
350 xfs_inode_t *ip,
351 u_int evmask,
352 u_int16_t state)
353 {
354 xfs_mount_t *mp = ip->i_mount;
355 xfs_trans_t *tp;
356 int error;
357
358 if (!capable(CAP_SYS_ADMIN))
359 return XFS_ERROR(EPERM);
360
361 if (XFS_FORCED_SHUTDOWN(mp))
362 return XFS_ERROR(EIO);
363
364 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
365 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
366 if (error) {
367 xfs_trans_cancel(tp, 0);
368 return error;
369 }
370 xfs_ilock(ip, XFS_ILOCK_EXCL);
371 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
372
373 ip->i_d.di_dmevmask = evmask;
374 ip->i_d.di_dmstate = state;
375
376 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
377 error = xfs_trans_commit(tp, 0);
378
379 return error;
380 }
381
382 STATIC int
383 xfs_fssetdm_by_handle(
384 struct file *parfilp,
385 void __user *arg)
386 {
387 int error;
388 struct fsdmidata fsd;
389 xfs_fsop_setdm_handlereq_t dmhreq;
390 struct dentry *dentry;
391
392 if (!capable(CAP_MKNOD))
393 return -XFS_ERROR(EPERM);
394 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
395 return -XFS_ERROR(EFAULT);
396
397 error = mnt_want_write_file(parfilp);
398 if (error)
399 return error;
400
401 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
402 if (IS_ERR(dentry)) {
403 mnt_drop_write_file(parfilp);
404 return PTR_ERR(dentry);
405 }
406
407 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
408 error = -XFS_ERROR(EPERM);
409 goto out;
410 }
411
412 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
413 error = -XFS_ERROR(EFAULT);
414 goto out;
415 }
416
417 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
418 fsd.fsd_dmstate);
419
420 out:
421 mnt_drop_write_file(parfilp);
422 dput(dentry);
423 return error;
424 }
425
426 STATIC int
427 xfs_attrlist_by_handle(
428 struct file *parfilp,
429 void __user *arg)
430 {
431 int error = -ENOMEM;
432 attrlist_cursor_kern_t *cursor;
433 xfs_fsop_attrlist_handlereq_t al_hreq;
434 struct dentry *dentry;
435 char *kbuf;
436
437 if (!capable(CAP_SYS_ADMIN))
438 return -XFS_ERROR(EPERM);
439 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
440 return -XFS_ERROR(EFAULT);
441 if (al_hreq.buflen < sizeof(struct attrlist) ||
442 al_hreq.buflen > XATTR_LIST_MAX)
443 return -XFS_ERROR(EINVAL);
444
445 /*
446 * Reject flags, only allow namespaces.
447 */
448 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
449 return -XFS_ERROR(EINVAL);
450
451 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
452 if (IS_ERR(dentry))
453 return PTR_ERR(dentry);
454
455 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
456 if (!kbuf)
457 goto out_dput;
458
459 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
460 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
461 al_hreq.flags, cursor);
462 if (error)
463 goto out_kfree;
464
465 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
466 error = -EFAULT;
467
468 out_kfree:
469 kmem_free(kbuf);
470 out_dput:
471 dput(dentry);
472 return error;
473 }
474
475 int
476 xfs_attrmulti_attr_get(
477 struct inode *inode,
478 unsigned char *name,
479 unsigned char __user *ubuf,
480 __uint32_t *len,
481 __uint32_t flags)
482 {
483 unsigned char *kbuf;
484 int error = EFAULT;
485
486 if (*len > XATTR_SIZE_MAX)
487 return EINVAL;
488 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
489 if (!kbuf)
490 return ENOMEM;
491
492 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
493 if (error)
494 goto out_kfree;
495
496 if (copy_to_user(ubuf, kbuf, *len))
497 error = EFAULT;
498
499 out_kfree:
500 kmem_free(kbuf);
501 return error;
502 }
503
504 int
505 xfs_attrmulti_attr_set(
506 struct inode *inode,
507 unsigned char *name,
508 const unsigned char __user *ubuf,
509 __uint32_t len,
510 __uint32_t flags)
511 {
512 unsigned char *kbuf;
513 int error = EFAULT;
514
515 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
516 return EPERM;
517 if (len > XATTR_SIZE_MAX)
518 return EINVAL;
519
520 kbuf = memdup_user(ubuf, len);
521 if (IS_ERR(kbuf))
522 return PTR_ERR(kbuf);
523
524 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
525
526 return error;
527 }
528
529 int
530 xfs_attrmulti_attr_remove(
531 struct inode *inode,
532 unsigned char *name,
533 __uint32_t flags)
534 {
535 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
536 return EPERM;
537 return xfs_attr_remove(XFS_I(inode), name, flags);
538 }
539
540 STATIC int
541 xfs_attrmulti_by_handle(
542 struct file *parfilp,
543 void __user *arg)
544 {
545 int error;
546 xfs_attr_multiop_t *ops;
547 xfs_fsop_attrmulti_handlereq_t am_hreq;
548 struct dentry *dentry;
549 unsigned int i, size;
550 unsigned char *attr_name;
551
552 if (!capable(CAP_SYS_ADMIN))
553 return -XFS_ERROR(EPERM);
554 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
555 return -XFS_ERROR(EFAULT);
556
557 /* overflow check */
558 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
559 return -E2BIG;
560
561 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
562 if (IS_ERR(dentry))
563 return PTR_ERR(dentry);
564
565 error = E2BIG;
566 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
567 if (!size || size > 16 * PAGE_SIZE)
568 goto out_dput;
569
570 ops = memdup_user(am_hreq.ops, size);
571 if (IS_ERR(ops)) {
572 error = PTR_ERR(ops);
573 goto out_dput;
574 }
575
576 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
577 if (!attr_name)
578 goto out_kfree_ops;
579
580 error = 0;
581 for (i = 0; i < am_hreq.opcount; i++) {
582 ops[i].am_error = strncpy_from_user((char *)attr_name,
583 ops[i].am_attrname, MAXNAMELEN);
584 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
585 error = -ERANGE;
586 if (ops[i].am_error < 0)
587 break;
588
589 switch (ops[i].am_opcode) {
590 case ATTR_OP_GET:
591 ops[i].am_error = xfs_attrmulti_attr_get(
592 dentry->d_inode, attr_name,
593 ops[i].am_attrvalue, &ops[i].am_length,
594 ops[i].am_flags);
595 break;
596 case ATTR_OP_SET:
597 ops[i].am_error = mnt_want_write_file(parfilp);
598 if (ops[i].am_error)
599 break;
600 ops[i].am_error = xfs_attrmulti_attr_set(
601 dentry->d_inode, attr_name,
602 ops[i].am_attrvalue, ops[i].am_length,
603 ops[i].am_flags);
604 mnt_drop_write_file(parfilp);
605 break;
606 case ATTR_OP_REMOVE:
607 ops[i].am_error = mnt_want_write_file(parfilp);
608 if (ops[i].am_error)
609 break;
610 ops[i].am_error = xfs_attrmulti_attr_remove(
611 dentry->d_inode, attr_name,
612 ops[i].am_flags);
613 mnt_drop_write_file(parfilp);
614 break;
615 default:
616 ops[i].am_error = EINVAL;
617 }
618 }
619
620 if (copy_to_user(am_hreq.ops, ops, size))
621 error = XFS_ERROR(EFAULT);
622
623 kfree(attr_name);
624 out_kfree_ops:
625 kfree(ops);
626 out_dput:
627 dput(dentry);
628 return -error;
629 }
630
631 int
632 xfs_ioc_space(
633 struct xfs_inode *ip,
634 struct inode *inode,
635 struct file *filp,
636 int ioflags,
637 unsigned int cmd,
638 xfs_flock64_t *bf)
639 {
640 struct xfs_mount *mp = ip->i_mount;
641 struct xfs_trans *tp;
642 struct iattr iattr;
643 bool setprealloc = false;
644 bool clrprealloc = false;
645 int error;
646
647 /*
648 * Only allow the sys admin to reserve space unless
649 * unwritten extents are enabled.
650 */
651 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
652 !capable(CAP_SYS_ADMIN))
653 return -XFS_ERROR(EPERM);
654
655 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
656 return -XFS_ERROR(EPERM);
657
658 if (!(filp->f_mode & FMODE_WRITE))
659 return -XFS_ERROR(EBADF);
660
661 if (!S_ISREG(inode->i_mode))
662 return -XFS_ERROR(EINVAL);
663
664 error = mnt_want_write_file(filp);
665 if (error)
666 return error;
667
668 xfs_ilock(ip, XFS_IOLOCK_EXCL);
669
670 switch (bf->l_whence) {
671 case 0: /*SEEK_SET*/
672 break;
673 case 1: /*SEEK_CUR*/
674 bf->l_start += filp->f_pos;
675 break;
676 case 2: /*SEEK_END*/
677 bf->l_start += XFS_ISIZE(ip);
678 break;
679 default:
680 error = XFS_ERROR(EINVAL);
681 goto out_unlock;
682 }
683
684 /*
685 * length of <= 0 for resv/unresv/zero is invalid. length for
686 * alloc/free is ignored completely and we have no idea what userspace
687 * might have set it to, so set it to zero to allow range
688 * checks to pass.
689 */
690 switch (cmd) {
691 case XFS_IOC_ZERO_RANGE:
692 case XFS_IOC_RESVSP:
693 case XFS_IOC_RESVSP64:
694 case XFS_IOC_UNRESVSP:
695 case XFS_IOC_UNRESVSP64:
696 if (bf->l_len <= 0) {
697 error = XFS_ERROR(EINVAL);
698 goto out_unlock;
699 }
700 break;
701 default:
702 bf->l_len = 0;
703 break;
704 }
705
706 if (bf->l_start < 0 ||
707 bf->l_start > mp->m_super->s_maxbytes ||
708 bf->l_start + bf->l_len < 0 ||
709 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
710 error = XFS_ERROR(EINVAL);
711 goto out_unlock;
712 }
713
714 switch (cmd) {
715 case XFS_IOC_ZERO_RANGE:
716 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
717 if (!error)
718 setprealloc = true;
719 break;
720 case XFS_IOC_RESVSP:
721 case XFS_IOC_RESVSP64:
722 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
723 XFS_BMAPI_PREALLOC);
724 if (!error)
725 setprealloc = true;
726 break;
727 case XFS_IOC_UNRESVSP:
728 case XFS_IOC_UNRESVSP64:
729 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
730 break;
731 case XFS_IOC_ALLOCSP:
732 case XFS_IOC_ALLOCSP64:
733 case XFS_IOC_FREESP:
734 case XFS_IOC_FREESP64:
735 if (bf->l_start > XFS_ISIZE(ip)) {
736 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
737 bf->l_start - XFS_ISIZE(ip), 0);
738 if (error)
739 goto out_unlock;
740 }
741
742 iattr.ia_valid = ATTR_SIZE;
743 iattr.ia_size = bf->l_start;
744
745 error = xfs_setattr_size(ip, &iattr);
746 if (!error)
747 clrprealloc = true;
748 break;
749 default:
750 ASSERT(0);
751 error = XFS_ERROR(EINVAL);
752 }
753
754 if (error)
755 goto out_unlock;
756
757 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
758 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
759 if (error) {
760 xfs_trans_cancel(tp, 0);
761 goto out_unlock;
762 }
763
764 xfs_ilock(ip, XFS_ILOCK_EXCL);
765 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
766
767 if (!(ioflags & IO_INVIS)) {
768 ip->i_d.di_mode &= ~S_ISUID;
769 if (ip->i_d.di_mode & S_IXGRP)
770 ip->i_d.di_mode &= ~S_ISGID;
771 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
772 }
773
774 if (setprealloc)
775 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
776 else if (clrprealloc)
777 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
778
779 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
780 if (filp->f_flags & O_DSYNC)
781 xfs_trans_set_sync(tp);
782 error = xfs_trans_commit(tp, 0);
783
784 out_unlock:
785 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
786 mnt_drop_write_file(filp);
787 return -error;
788 }
789
790 STATIC int
791 xfs_ioc_bulkstat(
792 xfs_mount_t *mp,
793 unsigned int cmd,
794 void __user *arg)
795 {
796 xfs_fsop_bulkreq_t bulkreq;
797 int count; /* # of records returned */
798 xfs_ino_t inlast; /* last inode number */
799 int done;
800 int error;
801
802 /* done = 1 if there are more stats to get and if bulkstat */
803 /* should be called again (unused here, but used in dmapi) */
804
805 if (!capable(CAP_SYS_ADMIN))
806 return -EPERM;
807
808 if (XFS_FORCED_SHUTDOWN(mp))
809 return -XFS_ERROR(EIO);
810
811 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
812 return -XFS_ERROR(EFAULT);
813
814 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
815 return -XFS_ERROR(EFAULT);
816
817 if ((count = bulkreq.icount) <= 0)
818 return -XFS_ERROR(EINVAL);
819
820 if (bulkreq.ubuffer == NULL)
821 return -XFS_ERROR(EINVAL);
822
823 if (cmd == XFS_IOC_FSINUMBERS)
824 error = xfs_inumbers(mp, &inlast, &count,
825 bulkreq.ubuffer, xfs_inumbers_fmt);
826 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
827 error = xfs_bulkstat_single(mp, &inlast,
828 bulkreq.ubuffer, &done);
829 else /* XFS_IOC_FSBULKSTAT */
830 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
831 sizeof(xfs_bstat_t), bulkreq.ubuffer,
832 &done);
833
834 if (error)
835 return -error;
836
837 if (bulkreq.ocount != NULL) {
838 if (copy_to_user(bulkreq.lastip, &inlast,
839 sizeof(xfs_ino_t)))
840 return -XFS_ERROR(EFAULT);
841
842 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
843 return -XFS_ERROR(EFAULT);
844 }
845
846 return 0;
847 }
848
849 STATIC int
850 xfs_ioc_fsgeometry_v1(
851 xfs_mount_t *mp,
852 void __user *arg)
853 {
854 xfs_fsop_geom_t fsgeo;
855 int error;
856
857 error = xfs_fs_geometry(mp, &fsgeo, 3);
858 if (error)
859 return -error;
860
861 /*
862 * Caller should have passed an argument of type
863 * xfs_fsop_geom_v1_t. This is a proper subset of the
864 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
865 */
866 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
867 return -XFS_ERROR(EFAULT);
868 return 0;
869 }
870
871 STATIC int
872 xfs_ioc_fsgeometry(
873 xfs_mount_t *mp,
874 void __user *arg)
875 {
876 xfs_fsop_geom_t fsgeo;
877 int error;
878
879 error = xfs_fs_geometry(mp, &fsgeo, 4);
880 if (error)
881 return -error;
882
883 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
884 return -XFS_ERROR(EFAULT);
885 return 0;
886 }
887
888 /*
889 * Linux extended inode flags interface.
890 */
891
892 STATIC unsigned int
893 xfs_merge_ioc_xflags(
894 unsigned int flags,
895 unsigned int start)
896 {
897 unsigned int xflags = start;
898
899 if (flags & FS_IMMUTABLE_FL)
900 xflags |= XFS_XFLAG_IMMUTABLE;
901 else
902 xflags &= ~XFS_XFLAG_IMMUTABLE;
903 if (flags & FS_APPEND_FL)
904 xflags |= XFS_XFLAG_APPEND;
905 else
906 xflags &= ~XFS_XFLAG_APPEND;
907 if (flags & FS_SYNC_FL)
908 xflags |= XFS_XFLAG_SYNC;
909 else
910 xflags &= ~XFS_XFLAG_SYNC;
911 if (flags & FS_NOATIME_FL)
912 xflags |= XFS_XFLAG_NOATIME;
913 else
914 xflags &= ~XFS_XFLAG_NOATIME;
915 if (flags & FS_NODUMP_FL)
916 xflags |= XFS_XFLAG_NODUMP;
917 else
918 xflags &= ~XFS_XFLAG_NODUMP;
919
920 return xflags;
921 }
922
923 STATIC unsigned int
924 xfs_di2lxflags(
925 __uint16_t di_flags)
926 {
927 unsigned int flags = 0;
928
929 if (di_flags & XFS_DIFLAG_IMMUTABLE)
930 flags |= FS_IMMUTABLE_FL;
931 if (di_flags & XFS_DIFLAG_APPEND)
932 flags |= FS_APPEND_FL;
933 if (di_flags & XFS_DIFLAG_SYNC)
934 flags |= FS_SYNC_FL;
935 if (di_flags & XFS_DIFLAG_NOATIME)
936 flags |= FS_NOATIME_FL;
937 if (di_flags & XFS_DIFLAG_NODUMP)
938 flags |= FS_NODUMP_FL;
939 return flags;
940 }
941
942 STATIC int
943 xfs_ioc_fsgetxattr(
944 xfs_inode_t *ip,
945 int attr,
946 void __user *arg)
947 {
948 struct fsxattr fa;
949
950 memset(&fa, 0, sizeof(struct fsxattr));
951
952 xfs_ilock(ip, XFS_ILOCK_SHARED);
953 fa.fsx_xflags = xfs_ip2xflags(ip);
954 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
955 fa.fsx_projid = xfs_get_projid(ip);
956
957 if (attr) {
958 if (ip->i_afp) {
959 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
960 fa.fsx_nextents = ip->i_afp->if_bytes /
961 sizeof(xfs_bmbt_rec_t);
962 else
963 fa.fsx_nextents = ip->i_d.di_anextents;
964 } else
965 fa.fsx_nextents = 0;
966 } else {
967 if (ip->i_df.if_flags & XFS_IFEXTENTS)
968 fa.fsx_nextents = ip->i_df.if_bytes /
969 sizeof(xfs_bmbt_rec_t);
970 else
971 fa.fsx_nextents = ip->i_d.di_nextents;
972 }
973 xfs_iunlock(ip, XFS_ILOCK_SHARED);
974
975 if (copy_to_user(arg, &fa, sizeof(fa)))
976 return -EFAULT;
977 return 0;
978 }
979
980 STATIC void
981 xfs_set_diflags(
982 struct xfs_inode *ip,
983 unsigned int xflags)
984 {
985 unsigned int di_flags;
986
987 /* can't set PREALLOC this way, just preserve it */
988 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
989 if (xflags & XFS_XFLAG_IMMUTABLE)
990 di_flags |= XFS_DIFLAG_IMMUTABLE;
991 if (xflags & XFS_XFLAG_APPEND)
992 di_flags |= XFS_DIFLAG_APPEND;
993 if (xflags & XFS_XFLAG_SYNC)
994 di_flags |= XFS_DIFLAG_SYNC;
995 if (xflags & XFS_XFLAG_NOATIME)
996 di_flags |= XFS_DIFLAG_NOATIME;
997 if (xflags & XFS_XFLAG_NODUMP)
998 di_flags |= XFS_DIFLAG_NODUMP;
999 if (xflags & XFS_XFLAG_PROJINHERIT)
1000 di_flags |= XFS_DIFLAG_PROJINHERIT;
1001 if (xflags & XFS_XFLAG_NODEFRAG)
1002 di_flags |= XFS_DIFLAG_NODEFRAG;
1003 if (xflags & XFS_XFLAG_FILESTREAM)
1004 di_flags |= XFS_DIFLAG_FILESTREAM;
1005 if (S_ISDIR(ip->i_d.di_mode)) {
1006 if (xflags & XFS_XFLAG_RTINHERIT)
1007 di_flags |= XFS_DIFLAG_RTINHERIT;
1008 if (xflags & XFS_XFLAG_NOSYMLINKS)
1009 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1010 if (xflags & XFS_XFLAG_EXTSZINHERIT)
1011 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1012 } else if (S_ISREG(ip->i_d.di_mode)) {
1013 if (xflags & XFS_XFLAG_REALTIME)
1014 di_flags |= XFS_DIFLAG_REALTIME;
1015 if (xflags & XFS_XFLAG_EXTSIZE)
1016 di_flags |= XFS_DIFLAG_EXTSIZE;
1017 }
1018
1019 ip->i_d.di_flags = di_flags;
1020 }
1021
1022 STATIC void
1023 xfs_diflags_to_linux(
1024 struct xfs_inode *ip)
1025 {
1026 struct inode *inode = VFS_I(ip);
1027 unsigned int xflags = xfs_ip2xflags(ip);
1028
1029 if (xflags & XFS_XFLAG_IMMUTABLE)
1030 inode->i_flags |= S_IMMUTABLE;
1031 else
1032 inode->i_flags &= ~S_IMMUTABLE;
1033 if (xflags & XFS_XFLAG_APPEND)
1034 inode->i_flags |= S_APPEND;
1035 else
1036 inode->i_flags &= ~S_APPEND;
1037 if (xflags & XFS_XFLAG_SYNC)
1038 inode->i_flags |= S_SYNC;
1039 else
1040 inode->i_flags &= ~S_SYNC;
1041 if (xflags & XFS_XFLAG_NOATIME)
1042 inode->i_flags |= S_NOATIME;
1043 else
1044 inode->i_flags &= ~S_NOATIME;
1045 }
1046
1047 #define FSX_PROJID 1
1048 #define FSX_EXTSIZE 2
1049 #define FSX_XFLAGS 4
1050 #define FSX_NONBLOCK 8
1051
1052 STATIC int
1053 xfs_ioctl_setattr(
1054 xfs_inode_t *ip,
1055 struct fsxattr *fa,
1056 int mask)
1057 {
1058 struct xfs_mount *mp = ip->i_mount;
1059 struct xfs_trans *tp;
1060 unsigned int lock_flags = 0;
1061 struct xfs_dquot *udqp = NULL;
1062 struct xfs_dquot *pdqp = NULL;
1063 struct xfs_dquot *olddquot = NULL;
1064 int code;
1065
1066 trace_xfs_ioctl_setattr(ip);
1067
1068 if (mp->m_flags & XFS_MOUNT_RDONLY)
1069 return XFS_ERROR(EROFS);
1070 if (XFS_FORCED_SHUTDOWN(mp))
1071 return XFS_ERROR(EIO);
1072
1073 /*
1074 * Disallow 32bit project ids when projid32bit feature is not enabled.
1075 */
1076 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
1077 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1078 return XFS_ERROR(EINVAL);
1079
1080 /*
1081 * If disk quotas is on, we make sure that the dquots do exist on disk,
1082 * before we start any other transactions. Trying to do this later
1083 * is messy. We don't care to take a readlock to look at the ids
1084 * in inode here, because we can't hold it across the trans_reserve.
1085 * If the IDs do change before we take the ilock, we're covered
1086 * because the i_*dquot fields will get updated anyway.
1087 */
1088 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
1089 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1090 ip->i_d.di_gid, fa->fsx_projid,
1091 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1092 if (code)
1093 return code;
1094 }
1095
1096 /*
1097 * For the other attributes, we acquire the inode lock and
1098 * first do an error checking pass.
1099 */
1100 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1101 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1102 if (code)
1103 goto error_return;
1104
1105 lock_flags = XFS_ILOCK_EXCL;
1106 xfs_ilock(ip, lock_flags);
1107
1108 /*
1109 * CAP_FOWNER overrides the following restrictions:
1110 *
1111 * The user ID of the calling process must be equal
1112 * to the file owner ID, except in cases where the
1113 * CAP_FSETID capability is applicable.
1114 */
1115 if (!inode_owner_or_capable(VFS_I(ip))) {
1116 code = XFS_ERROR(EPERM);
1117 goto error_return;
1118 }
1119
1120 /*
1121 * Do a quota reservation only if projid is actually going to change.
1122 * Only allow changing of projid from init_user_ns since it is a
1123 * non user namespace aware identifier.
1124 */
1125 if (mask & FSX_PROJID) {
1126 if (current_user_ns() != &init_user_ns) {
1127 code = XFS_ERROR(EINVAL);
1128 goto error_return;
1129 }
1130
1131 if (XFS_IS_QUOTA_RUNNING(mp) &&
1132 XFS_IS_PQUOTA_ON(mp) &&
1133 xfs_get_projid(ip) != fa->fsx_projid) {
1134 ASSERT(tp);
1135 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1136 pdqp, capable(CAP_FOWNER) ?
1137 XFS_QMOPT_FORCE_RES : 0);
1138 if (code) /* out of quota */
1139 goto error_return;
1140 }
1141 }
1142
1143 if (mask & FSX_EXTSIZE) {
1144 /*
1145 * Can't change extent size if any extents are allocated.
1146 */
1147 if (ip->i_d.di_nextents &&
1148 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1149 fa->fsx_extsize)) {
1150 code = XFS_ERROR(EINVAL); /* EFBIG? */
1151 goto error_return;
1152 }
1153
1154 /*
1155 * Extent size must be a multiple of the appropriate block
1156 * size, if set at all. It must also be smaller than the
1157 * maximum extent size supported by the filesystem.
1158 *
1159 * Also, for non-realtime files, limit the extent size hint to
1160 * half the size of the AGs in the filesystem so alignment
1161 * doesn't result in extents larger than an AG.
1162 */
1163 if (fa->fsx_extsize != 0) {
1164 xfs_extlen_t size;
1165 xfs_fsblock_t extsize_fsb;
1166
1167 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1168 if (extsize_fsb > MAXEXTLEN) {
1169 code = XFS_ERROR(EINVAL);
1170 goto error_return;
1171 }
1172
1173 if (XFS_IS_REALTIME_INODE(ip) ||
1174 ((mask & FSX_XFLAGS) &&
1175 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1176 size = mp->m_sb.sb_rextsize <<
1177 mp->m_sb.sb_blocklog;
1178 } else {
1179 size = mp->m_sb.sb_blocksize;
1180 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1181 code = XFS_ERROR(EINVAL);
1182 goto error_return;
1183 }
1184 }
1185
1186 if (fa->fsx_extsize % size) {
1187 code = XFS_ERROR(EINVAL);
1188 goto error_return;
1189 }
1190 }
1191 }
1192
1193
1194 if (mask & FSX_XFLAGS) {
1195 /*
1196 * Can't change realtime flag if any extents are allocated.
1197 */
1198 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1199 (XFS_IS_REALTIME_INODE(ip)) !=
1200 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1201 code = XFS_ERROR(EINVAL); /* EFBIG? */
1202 goto error_return;
1203 }
1204
1205 /*
1206 * If realtime flag is set then must have realtime data.
1207 */
1208 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1209 if ((mp->m_sb.sb_rblocks == 0) ||
1210 (mp->m_sb.sb_rextsize == 0) ||
1211 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1212 code = XFS_ERROR(EINVAL);
1213 goto error_return;
1214 }
1215 }
1216
1217 /*
1218 * Can't modify an immutable/append-only file unless
1219 * we have appropriate permission.
1220 */
1221 if ((ip->i_d.di_flags &
1222 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1223 (fa->fsx_xflags &
1224 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1225 !capable(CAP_LINUX_IMMUTABLE)) {
1226 code = XFS_ERROR(EPERM);
1227 goto error_return;
1228 }
1229 }
1230
1231 xfs_trans_ijoin(tp, ip, 0);
1232
1233 /*
1234 * Change file ownership. Must be the owner or privileged.
1235 */
1236 if (mask & FSX_PROJID) {
1237 /*
1238 * CAP_FSETID overrides the following restrictions:
1239 *
1240 * The set-user-ID and set-group-ID bits of a file will be
1241 * cleared upon successful return from chown()
1242 */
1243 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1244 !inode_capable(VFS_I(ip), CAP_FSETID))
1245 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1246
1247 /*
1248 * Change the ownerships and register quota modifications
1249 * in the transaction.
1250 */
1251 if (xfs_get_projid(ip) != fa->fsx_projid) {
1252 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1253 olddquot = xfs_qm_vop_chown(tp, ip,
1254 &ip->i_pdquot, pdqp);
1255 }
1256 xfs_set_projid(ip, fa->fsx_projid);
1257
1258 /*
1259 * We may have to rev the inode as well as
1260 * the superblock version number since projids didn't
1261 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1262 */
1263 if (ip->i_d.di_version == 1)
1264 xfs_bump_ino_vers2(tp, ip);
1265 }
1266
1267 }
1268
1269 if (mask & FSX_EXTSIZE)
1270 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1271 if (mask & FSX_XFLAGS) {
1272 xfs_set_diflags(ip, fa->fsx_xflags);
1273 xfs_diflags_to_linux(ip);
1274 }
1275
1276 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1277 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1278
1279 XFS_STATS_INC(xs_ig_attrchg);
1280
1281 /*
1282 * If this is a synchronous mount, make sure that the
1283 * transaction goes to disk before returning to the user.
1284 * This is slightly sub-optimal in that truncates require
1285 * two sync transactions instead of one for wsync filesystems.
1286 * One for the truncate and one for the timestamps since we
1287 * don't want to change the timestamps unless we're sure the
1288 * truncate worked. Truncates are less than 1% of the laddis
1289 * mix so this probably isn't worth the trouble to optimize.
1290 */
1291 if (mp->m_flags & XFS_MOUNT_WSYNC)
1292 xfs_trans_set_sync(tp);
1293 code = xfs_trans_commit(tp, 0);
1294 xfs_iunlock(ip, lock_flags);
1295
1296 /*
1297 * Release any dquot(s) the inode had kept before chown.
1298 */
1299 xfs_qm_dqrele(olddquot);
1300 xfs_qm_dqrele(udqp);
1301 xfs_qm_dqrele(pdqp);
1302
1303 return code;
1304
1305 error_return:
1306 xfs_qm_dqrele(udqp);
1307 xfs_qm_dqrele(pdqp);
1308 xfs_trans_cancel(tp, 0);
1309 if (lock_flags)
1310 xfs_iunlock(ip, lock_flags);
1311 return code;
1312 }
1313
1314 STATIC int
1315 xfs_ioc_fssetxattr(
1316 xfs_inode_t *ip,
1317 struct file *filp,
1318 void __user *arg)
1319 {
1320 struct fsxattr fa;
1321 unsigned int mask;
1322 int error;
1323
1324 if (copy_from_user(&fa, arg, sizeof(fa)))
1325 return -EFAULT;
1326
1327 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1328 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1329 mask |= FSX_NONBLOCK;
1330
1331 error = mnt_want_write_file(filp);
1332 if (error)
1333 return error;
1334 error = xfs_ioctl_setattr(ip, &fa, mask);
1335 mnt_drop_write_file(filp);
1336 return -error;
1337 }
1338
1339 STATIC int
1340 xfs_ioc_getxflags(
1341 xfs_inode_t *ip,
1342 void __user *arg)
1343 {
1344 unsigned int flags;
1345
1346 flags = xfs_di2lxflags(ip->i_d.di_flags);
1347 if (copy_to_user(arg, &flags, sizeof(flags)))
1348 return -EFAULT;
1349 return 0;
1350 }
1351
1352 STATIC int
1353 xfs_ioc_setxflags(
1354 xfs_inode_t *ip,
1355 struct file *filp,
1356 void __user *arg)
1357 {
1358 struct fsxattr fa;
1359 unsigned int flags;
1360 unsigned int mask;
1361 int error;
1362
1363 if (copy_from_user(&flags, arg, sizeof(flags)))
1364 return -EFAULT;
1365
1366 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1367 FS_NOATIME_FL | FS_NODUMP_FL | \
1368 FS_SYNC_FL))
1369 return -EOPNOTSUPP;
1370
1371 mask = FSX_XFLAGS;
1372 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1373 mask |= FSX_NONBLOCK;
1374 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1375
1376 error = mnt_want_write_file(filp);
1377 if (error)
1378 return error;
1379 error = xfs_ioctl_setattr(ip, &fa, mask);
1380 mnt_drop_write_file(filp);
1381 return -error;
1382 }
1383
1384 STATIC int
1385 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1386 {
1387 struct getbmap __user *base = *ap;
1388
1389 /* copy only getbmap portion (not getbmapx) */
1390 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1391 return XFS_ERROR(EFAULT);
1392
1393 *ap += sizeof(struct getbmap);
1394 return 0;
1395 }
1396
1397 STATIC int
1398 xfs_ioc_getbmap(
1399 struct xfs_inode *ip,
1400 int ioflags,
1401 unsigned int cmd,
1402 void __user *arg)
1403 {
1404 struct getbmapx bmx;
1405 int error;
1406
1407 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1408 return -XFS_ERROR(EFAULT);
1409
1410 if (bmx.bmv_count < 2)
1411 return -XFS_ERROR(EINVAL);
1412
1413 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1414 if (ioflags & IO_INVIS)
1415 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1416
1417 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1418 (struct getbmap *)arg+1);
1419 if (error)
1420 return -error;
1421
1422 /* copy back header - only size of getbmap */
1423 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1424 return -XFS_ERROR(EFAULT);
1425 return 0;
1426 }
1427
1428 STATIC int
1429 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1430 {
1431 struct getbmapx __user *base = *ap;
1432
1433 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1434 return XFS_ERROR(EFAULT);
1435
1436 *ap += sizeof(struct getbmapx);
1437 return 0;
1438 }
1439
1440 STATIC int
1441 xfs_ioc_getbmapx(
1442 struct xfs_inode *ip,
1443 void __user *arg)
1444 {
1445 struct getbmapx bmx;
1446 int error;
1447
1448 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1449 return -XFS_ERROR(EFAULT);
1450
1451 if (bmx.bmv_count < 2)
1452 return -XFS_ERROR(EINVAL);
1453
1454 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1455 return -XFS_ERROR(EINVAL);
1456
1457 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1458 (struct getbmapx *)arg+1);
1459 if (error)
1460 return -error;
1461
1462 /* copy back header */
1463 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1464 return -XFS_ERROR(EFAULT);
1465
1466 return 0;
1467 }
1468
1469 int
1470 xfs_ioc_swapext(
1471 xfs_swapext_t *sxp)
1472 {
1473 xfs_inode_t *ip, *tip;
1474 struct fd f, tmp;
1475 int error = 0;
1476
1477 /* Pull information for the target fd */
1478 f = fdget((int)sxp->sx_fdtarget);
1479 if (!f.file) {
1480 error = XFS_ERROR(EINVAL);
1481 goto out;
1482 }
1483
1484 if (!(f.file->f_mode & FMODE_WRITE) ||
1485 !(f.file->f_mode & FMODE_READ) ||
1486 (f.file->f_flags & O_APPEND)) {
1487 error = XFS_ERROR(EBADF);
1488 goto out_put_file;
1489 }
1490
1491 tmp = fdget((int)sxp->sx_fdtmp);
1492 if (!tmp.file) {
1493 error = XFS_ERROR(EINVAL);
1494 goto out_put_file;
1495 }
1496
1497 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1498 !(tmp.file->f_mode & FMODE_READ) ||
1499 (tmp.file->f_flags & O_APPEND)) {
1500 error = XFS_ERROR(EBADF);
1501 goto out_put_tmp_file;
1502 }
1503
1504 if (IS_SWAPFILE(file_inode(f.file)) ||
1505 IS_SWAPFILE(file_inode(tmp.file))) {
1506 error = XFS_ERROR(EINVAL);
1507 goto out_put_tmp_file;
1508 }
1509
1510 ip = XFS_I(file_inode(f.file));
1511 tip = XFS_I(file_inode(tmp.file));
1512
1513 if (ip->i_mount != tip->i_mount) {
1514 error = XFS_ERROR(EINVAL);
1515 goto out_put_tmp_file;
1516 }
1517
1518 if (ip->i_ino == tip->i_ino) {
1519 error = XFS_ERROR(EINVAL);
1520 goto out_put_tmp_file;
1521 }
1522
1523 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1524 error = XFS_ERROR(EIO);
1525 goto out_put_tmp_file;
1526 }
1527
1528 error = xfs_swap_extents(ip, tip, sxp);
1529
1530 out_put_tmp_file:
1531 fdput(tmp);
1532 out_put_file:
1533 fdput(f);
1534 out:
1535 return error;
1536 }
1537
1538 /*
1539 * Note: some of the ioctl's return positive numbers as a
1540 * byte count indicating success, such as readlink_by_handle.
1541 * So we don't "sign flip" like most other routines. This means
1542 * true errors need to be returned as a negative value.
1543 */
1544 long
1545 xfs_file_ioctl(
1546 struct file *filp,
1547 unsigned int cmd,
1548 unsigned long p)
1549 {
1550 struct inode *inode = file_inode(filp);
1551 struct xfs_inode *ip = XFS_I(inode);
1552 struct xfs_mount *mp = ip->i_mount;
1553 void __user *arg = (void __user *)p;
1554 int ioflags = 0;
1555 int error;
1556
1557 if (filp->f_mode & FMODE_NOCMTIME)
1558 ioflags |= IO_INVIS;
1559
1560 trace_xfs_file_ioctl(ip);
1561
1562 switch (cmd) {
1563 case FITRIM:
1564 return xfs_ioc_trim(mp, arg);
1565 case XFS_IOC_ALLOCSP:
1566 case XFS_IOC_FREESP:
1567 case XFS_IOC_RESVSP:
1568 case XFS_IOC_UNRESVSP:
1569 case XFS_IOC_ALLOCSP64:
1570 case XFS_IOC_FREESP64:
1571 case XFS_IOC_RESVSP64:
1572 case XFS_IOC_UNRESVSP64:
1573 case XFS_IOC_ZERO_RANGE: {
1574 xfs_flock64_t bf;
1575
1576 if (copy_from_user(&bf, arg, sizeof(bf)))
1577 return -XFS_ERROR(EFAULT);
1578 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1579 }
1580 case XFS_IOC_DIOINFO: {
1581 struct dioattr da;
1582 xfs_buftarg_t *target =
1583 XFS_IS_REALTIME_INODE(ip) ?
1584 mp->m_rtdev_targp : mp->m_ddev_targp;
1585
1586 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1587 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1588
1589 if (copy_to_user(arg, &da, sizeof(da)))
1590 return -XFS_ERROR(EFAULT);
1591 return 0;
1592 }
1593
1594 case XFS_IOC_FSBULKSTAT_SINGLE:
1595 case XFS_IOC_FSBULKSTAT:
1596 case XFS_IOC_FSINUMBERS:
1597 return xfs_ioc_bulkstat(mp, cmd, arg);
1598
1599 case XFS_IOC_FSGEOMETRY_V1:
1600 return xfs_ioc_fsgeometry_v1(mp, arg);
1601
1602 case XFS_IOC_FSGEOMETRY:
1603 return xfs_ioc_fsgeometry(mp, arg);
1604
1605 case XFS_IOC_GETVERSION:
1606 return put_user(inode->i_generation, (int __user *)arg);
1607
1608 case XFS_IOC_FSGETXATTR:
1609 return xfs_ioc_fsgetxattr(ip, 0, arg);
1610 case XFS_IOC_FSGETXATTRA:
1611 return xfs_ioc_fsgetxattr(ip, 1, arg);
1612 case XFS_IOC_FSSETXATTR:
1613 return xfs_ioc_fssetxattr(ip, filp, arg);
1614 case XFS_IOC_GETXFLAGS:
1615 return xfs_ioc_getxflags(ip, arg);
1616 case XFS_IOC_SETXFLAGS:
1617 return xfs_ioc_setxflags(ip, filp, arg);
1618
1619 case XFS_IOC_FSSETDM: {
1620 struct fsdmidata dmi;
1621
1622 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1623 return -XFS_ERROR(EFAULT);
1624
1625 error = mnt_want_write_file(filp);
1626 if (error)
1627 return error;
1628
1629 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1630 dmi.fsd_dmstate);
1631 mnt_drop_write_file(filp);
1632 return -error;
1633 }
1634
1635 case XFS_IOC_GETBMAP:
1636 case XFS_IOC_GETBMAPA:
1637 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1638
1639 case XFS_IOC_GETBMAPX:
1640 return xfs_ioc_getbmapx(ip, arg);
1641
1642 case XFS_IOC_FD_TO_HANDLE:
1643 case XFS_IOC_PATH_TO_HANDLE:
1644 case XFS_IOC_PATH_TO_FSHANDLE: {
1645 xfs_fsop_handlereq_t hreq;
1646
1647 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1648 return -XFS_ERROR(EFAULT);
1649 return xfs_find_handle(cmd, &hreq);
1650 }
1651 case XFS_IOC_OPEN_BY_HANDLE: {
1652 xfs_fsop_handlereq_t hreq;
1653
1654 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1655 return -XFS_ERROR(EFAULT);
1656 return xfs_open_by_handle(filp, &hreq);
1657 }
1658 case XFS_IOC_FSSETDM_BY_HANDLE:
1659 return xfs_fssetdm_by_handle(filp, arg);
1660
1661 case XFS_IOC_READLINK_BY_HANDLE: {
1662 xfs_fsop_handlereq_t hreq;
1663
1664 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1665 return -XFS_ERROR(EFAULT);
1666 return xfs_readlink_by_handle(filp, &hreq);
1667 }
1668 case XFS_IOC_ATTRLIST_BY_HANDLE:
1669 return xfs_attrlist_by_handle(filp, arg);
1670
1671 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1672 return xfs_attrmulti_by_handle(filp, arg);
1673
1674 case XFS_IOC_SWAPEXT: {
1675 struct xfs_swapext sxp;
1676
1677 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1678 return -XFS_ERROR(EFAULT);
1679 error = mnt_want_write_file(filp);
1680 if (error)
1681 return error;
1682 error = xfs_ioc_swapext(&sxp);
1683 mnt_drop_write_file(filp);
1684 return -error;
1685 }
1686
1687 case XFS_IOC_FSCOUNTS: {
1688 xfs_fsop_counts_t out;
1689
1690 error = xfs_fs_counts(mp, &out);
1691 if (error)
1692 return -error;
1693
1694 if (copy_to_user(arg, &out, sizeof(out)))
1695 return -XFS_ERROR(EFAULT);
1696 return 0;
1697 }
1698
1699 case XFS_IOC_SET_RESBLKS: {
1700 xfs_fsop_resblks_t inout;
1701 __uint64_t in;
1702
1703 if (!capable(CAP_SYS_ADMIN))
1704 return -EPERM;
1705
1706 if (mp->m_flags & XFS_MOUNT_RDONLY)
1707 return -XFS_ERROR(EROFS);
1708
1709 if (copy_from_user(&inout, arg, sizeof(inout)))
1710 return -XFS_ERROR(EFAULT);
1711
1712 error = mnt_want_write_file(filp);
1713 if (error)
1714 return error;
1715
1716 /* input parameter is passed in resblks field of structure */
1717 in = inout.resblks;
1718 error = xfs_reserve_blocks(mp, &in, &inout);
1719 mnt_drop_write_file(filp);
1720 if (error)
1721 return -error;
1722
1723 if (copy_to_user(arg, &inout, sizeof(inout)))
1724 return -XFS_ERROR(EFAULT);
1725 return 0;
1726 }
1727
1728 case XFS_IOC_GET_RESBLKS: {
1729 xfs_fsop_resblks_t out;
1730
1731 if (!capable(CAP_SYS_ADMIN))
1732 return -EPERM;
1733
1734 error = xfs_reserve_blocks(mp, NULL, &out);
1735 if (error)
1736 return -error;
1737
1738 if (copy_to_user(arg, &out, sizeof(out)))
1739 return -XFS_ERROR(EFAULT);
1740
1741 return 0;
1742 }
1743
1744 case XFS_IOC_FSGROWFSDATA: {
1745 xfs_growfs_data_t in;
1746
1747 if (copy_from_user(&in, arg, sizeof(in)))
1748 return -XFS_ERROR(EFAULT);
1749
1750 error = mnt_want_write_file(filp);
1751 if (error)
1752 return error;
1753 error = xfs_growfs_data(mp, &in);
1754 mnt_drop_write_file(filp);
1755 return -error;
1756 }
1757
1758 case XFS_IOC_FSGROWFSLOG: {
1759 xfs_growfs_log_t in;
1760
1761 if (copy_from_user(&in, arg, sizeof(in)))
1762 return -XFS_ERROR(EFAULT);
1763
1764 error = mnt_want_write_file(filp);
1765 if (error)
1766 return error;
1767 error = xfs_growfs_log(mp, &in);
1768 mnt_drop_write_file(filp);
1769 return -error;
1770 }
1771
1772 case XFS_IOC_FSGROWFSRT: {
1773 xfs_growfs_rt_t in;
1774
1775 if (copy_from_user(&in, arg, sizeof(in)))
1776 return -XFS_ERROR(EFAULT);
1777
1778 error = mnt_want_write_file(filp);
1779 if (error)
1780 return error;
1781 error = xfs_growfs_rt(mp, &in);
1782 mnt_drop_write_file(filp);
1783 return -error;
1784 }
1785
1786 case XFS_IOC_GOINGDOWN: {
1787 __uint32_t in;
1788
1789 if (!capable(CAP_SYS_ADMIN))
1790 return -EPERM;
1791
1792 if (get_user(in, (__uint32_t __user *)arg))
1793 return -XFS_ERROR(EFAULT);
1794
1795 error = xfs_fs_goingdown(mp, in);
1796 return -error;
1797 }
1798
1799 case XFS_IOC_ERROR_INJECTION: {
1800 xfs_error_injection_t in;
1801
1802 if (!capable(CAP_SYS_ADMIN))
1803 return -EPERM;
1804
1805 if (copy_from_user(&in, arg, sizeof(in)))
1806 return -XFS_ERROR(EFAULT);
1807
1808 error = xfs_errortag_add(in.errtag, mp);
1809 return -error;
1810 }
1811
1812 case XFS_IOC_ERROR_CLEARALL:
1813 if (!capable(CAP_SYS_ADMIN))
1814 return -EPERM;
1815
1816 error = xfs_errortag_clearall(mp, 1);
1817 return -error;
1818
1819 case XFS_IOC_FREE_EOFBLOCKS: {
1820 struct xfs_fs_eofblocks eofb;
1821 struct xfs_eofblocks keofb;
1822
1823 if (!capable(CAP_SYS_ADMIN))
1824 return -EPERM;
1825
1826 if (mp->m_flags & XFS_MOUNT_RDONLY)
1827 return -XFS_ERROR(EROFS);
1828
1829 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1830 return -XFS_ERROR(EFAULT);
1831
1832 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1833 if (error)
1834 return -error;
1835
1836 return -xfs_icache_free_eofblocks(mp, &keofb);
1837 }
1838
1839 default:
1840 return -ENOTTY;
1841 }
1842 }
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