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