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Linux 3.12.5
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blob2e1e6c33841d2ca7920fd6b25fdd8858e7397014
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_format.h"
21 #include "xfs_log.h"
22 #include "xfs_trans.h"
23 #include "xfs_sb.h"
24 #include "xfs_ag.h"
25 #include "xfs_alloc.h"
26 #include "xfs_mount.h"
27 #include "xfs_bmap_btree.h"
28 #include "xfs_dinode.h"
29 #include "xfs_inode.h"
30 #include "xfs_ioctl.h"
31 #include "xfs_rtalloc.h"
32 #include "xfs_itable.h"
33 #include "xfs_error.h"
34 #include "xfs_attr.h"
35 #include "xfs_bmap.h"
36 #include "xfs_bmap_util.h"
37 #include "xfs_buf_item.h"
38 #include "xfs_fsops.h"
39 #include "xfs_discard.h"
40 #include "xfs_quota.h"
41 #include "xfs_inode_item.h"
42 #include "xfs_export.h"
43 #include "xfs_trace.h"
44 #include "xfs_icache.h"
45 #include "xfs_symlink.h"
46
47 #include <linux/capability.h>
48 #include <linux/dcache.h>
49 #include <linux/mount.h>
50 #include <linux/namei.h>
51 #include <linux/pagemap.h>
52 #include <linux/slab.h>
53 #include <linux/exportfs.h>
54
55 /*
56 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
57 * a file or fs handle.
58 *
59 * XFS_IOC_PATH_TO_FSHANDLE
60 * returns fs handle for a mount point or path within that mount point
61 * XFS_IOC_FD_TO_HANDLE
62 * returns full handle for a FD opened in user space
63 * XFS_IOC_PATH_TO_HANDLE
64 * returns full handle for a path
65 */
66 int
67 xfs_find_handle(
68 unsigned int cmd,
69 xfs_fsop_handlereq_t *hreq)
70 {
71 int hsize;
72 xfs_handle_t handle;
73 struct inode *inode;
74 struct fd f = {NULL};
75 struct path path;
76 int error;
77 struct xfs_inode *ip;
78
79 if (cmd == XFS_IOC_FD_TO_HANDLE) {
80 f = fdget(hreq->fd);
81 if (!f.file)
82 return -EBADF;
83 inode = file_inode(f.file);
84 } else {
85 error = user_lpath((const char __user *)hreq->path, &path);
86 if (error)
87 return error;
88 inode = path.dentry->d_inode;
89 }
90 ip = XFS_I(inode);
91
92 /*
93 * We can only generate handles for inodes residing on a XFS filesystem,
94 * and only for regular files, directories or symbolic links.
95 */
96 error = -EINVAL;
97 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
98 goto out_put;
99
100 error = -EBADF;
101 if (!S_ISREG(inode->i_mode) &&
102 !S_ISDIR(inode->i_mode) &&
103 !S_ISLNK(inode->i_mode))
104 goto out_put;
105
106
107 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
108
109 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
110 /*
111 * This handle only contains an fsid, zero the rest.
112 */
113 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
114 hsize = sizeof(xfs_fsid_t);
115 } else {
116 int lock_mode;
117
118 lock_mode = xfs_ilock_map_shared(ip);
119 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
120 sizeof(handle.ha_fid.fid_len);
121 handle.ha_fid.fid_pad = 0;
122 handle.ha_fid.fid_gen = ip->i_d.di_gen;
123 handle.ha_fid.fid_ino = ip->i_ino;
124 xfs_iunlock_map_shared(ip, lock_mode);
125
126 hsize = XFS_HSIZE(handle);
127 }
128
129 error = -EFAULT;
130 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
131 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
132 goto out_put;
133
134 error = 0;
135
136 out_put:
137 if (cmd == XFS_IOC_FD_TO_HANDLE)
138 fdput(f);
139 else
140 path_put(&path);
141 return error;
142 }
143
144 /*
145 * No need to do permission checks on the various pathname components
146 * as the handle operations are privileged.
147 */
148 STATIC int
149 xfs_handle_acceptable(
150 void *context,
151 struct dentry *dentry)
152 {
153 return 1;
154 }
155
156 /*
157 * Convert userspace handle data into a dentry.
158 */
159 struct dentry *
160 xfs_handle_to_dentry(
161 struct file *parfilp,
162 void __user *uhandle,
163 u32 hlen)
164 {
165 xfs_handle_t handle;
166 struct xfs_fid64 fid;
167
168 /*
169 * Only allow handle opens under a directory.
170 */
171 if (!S_ISDIR(file_inode(parfilp)->i_mode))
172 return ERR_PTR(-ENOTDIR);
173
174 if (hlen != sizeof(xfs_handle_t))
175 return ERR_PTR(-EINVAL);
176 if (copy_from_user(&handle, uhandle, hlen))
177 return ERR_PTR(-EFAULT);
178 if (handle.ha_fid.fid_len !=
179 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
180 return ERR_PTR(-EINVAL);
181
182 memset(&fid, 0, sizeof(struct fid));
183 fid.ino = handle.ha_fid.fid_ino;
184 fid.gen = handle.ha_fid.fid_gen;
185
186 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
187 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
188 xfs_handle_acceptable, NULL);
189 }
190
191 STATIC struct dentry *
192 xfs_handlereq_to_dentry(
193 struct file *parfilp,
194 xfs_fsop_handlereq_t *hreq)
195 {
196 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
197 }
198
199 int
200 xfs_open_by_handle(
201 struct file *parfilp,
202 xfs_fsop_handlereq_t *hreq)
203 {
204 const struct cred *cred = current_cred();
205 int error;
206 int fd;
207 int permflag;
208 struct file *filp;
209 struct inode *inode;
210 struct dentry *dentry;
211 fmode_t fmode;
212 struct path path;
213
214 if (!capable(CAP_SYS_ADMIN))
215 return -XFS_ERROR(EPERM);
216
217 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 if (IS_ERR(dentry))
219 return PTR_ERR(dentry);
220 inode = dentry->d_inode;
221
222 /* Restrict xfs_open_by_handle to directories & regular files. */
223 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
224 error = -XFS_ERROR(EPERM);
225 goto out_dput;
226 }
227
228 #if BITS_PER_LONG != 32
229 hreq->oflags |= O_LARGEFILE;
230 #endif
231
232 permflag = hreq->oflags;
233 fmode = OPEN_FMODE(permflag);
234 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
235 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
236 error = -XFS_ERROR(EPERM);
237 goto out_dput;
238 }
239
240 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
241 error = -XFS_ERROR(EACCES);
242 goto out_dput;
243 }
244
245 /* Can't write directories. */
246 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
247 error = -XFS_ERROR(EISDIR);
248 goto out_dput;
249 }
250
251 fd = get_unused_fd_flags(0);
252 if (fd < 0) {
253 error = fd;
254 goto out_dput;
255 }
256
257 path.mnt = parfilp->f_path.mnt;
258 path.dentry = dentry;
259 filp = dentry_open(&path, hreq->oflags, cred);
260 dput(dentry);
261 if (IS_ERR(filp)) {
262 put_unused_fd(fd);
263 return PTR_ERR(filp);
264 }
265
266 if (S_ISREG(inode->i_mode)) {
267 filp->f_flags |= O_NOATIME;
268 filp->f_mode |= FMODE_NOCMTIME;
269 }
270
271 fd_install(fd, filp);
272 return fd;
273
274 out_dput:
275 dput(dentry);
276 return error;
277 }
278
279 /*
280 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
281 * unused first argument.
282 */
283 STATIC int
284 do_readlink(
285 char __user *buffer,
286 int buflen,
287 const char *link)
288 {
289 int len;
290
291 len = PTR_ERR(link);
292 if (IS_ERR(link))
293 goto out;
294
295 len = strlen(link);
296 if (len > (unsigned) buflen)
297 len = buflen;
298 if (copy_to_user(buffer, link, len))
299 len = -EFAULT;
300 out:
301 return len;
302 }
303
304
305 int
306 xfs_readlink_by_handle(
307 struct file *parfilp,
308 xfs_fsop_handlereq_t *hreq)
309 {
310 struct dentry *dentry;
311 __u32 olen;
312 void *link;
313 int error;
314
315 if (!capable(CAP_SYS_ADMIN))
316 return -XFS_ERROR(EPERM);
317
318 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
319 if (IS_ERR(dentry))
320 return PTR_ERR(dentry);
321
322 /* Restrict this handle operation to symlinks only. */
323 if (!S_ISLNK(dentry->d_inode->i_mode)) {
324 error = -XFS_ERROR(EINVAL);
325 goto out_dput;
326 }
327
328 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
329 error = -XFS_ERROR(EFAULT);
330 goto out_dput;
331 }
332
333 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
334 if (!link) {
335 error = -XFS_ERROR(ENOMEM);
336 goto out_dput;
337 }
338
339 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
340 if (error)
341 goto out_kfree;
342 error = do_readlink(hreq->ohandle, olen, link);
343 if (error)
344 goto out_kfree;
345
346 out_kfree:
347 kfree(link);
348 out_dput:
349 dput(dentry);
350 return error;
351 }
352
353 int
354 xfs_set_dmattrs(
355 xfs_inode_t *ip,
356 u_int evmask,
357 u_int16_t state)
358 {
359 xfs_mount_t *mp = ip->i_mount;
360 xfs_trans_t *tp;
361 int error;
362
363 if (!capable(CAP_SYS_ADMIN))
364 return XFS_ERROR(EPERM);
365
366 if (XFS_FORCED_SHUTDOWN(mp))
367 return XFS_ERROR(EIO);
368
369 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
370 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
371 if (error) {
372 xfs_trans_cancel(tp, 0);
373 return error;
374 }
375 xfs_ilock(ip, XFS_ILOCK_EXCL);
376 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
377
378 ip->i_d.di_dmevmask = evmask;
379 ip->i_d.di_dmstate = state;
380
381 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
382 error = xfs_trans_commit(tp, 0);
383
384 return error;
385 }
386
387 STATIC int
388 xfs_fssetdm_by_handle(
389 struct file *parfilp,
390 void __user *arg)
391 {
392 int error;
393 struct fsdmidata fsd;
394 xfs_fsop_setdm_handlereq_t dmhreq;
395 struct dentry *dentry;
396
397 if (!capable(CAP_MKNOD))
398 return -XFS_ERROR(EPERM);
399 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
400 return -XFS_ERROR(EFAULT);
401
402 error = mnt_want_write_file(parfilp);
403 if (error)
404 return error;
405
406 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
407 if (IS_ERR(dentry)) {
408 mnt_drop_write_file(parfilp);
409 return PTR_ERR(dentry);
410 }
411
412 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
413 error = -XFS_ERROR(EPERM);
414 goto out;
415 }
416
417 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
418 error = -XFS_ERROR(EFAULT);
419 goto out;
420 }
421
422 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
423 fsd.fsd_dmstate);
424
425 out:
426 mnt_drop_write_file(parfilp);
427 dput(dentry);
428 return error;
429 }
430
431 STATIC int
432 xfs_attrlist_by_handle(
433 struct file *parfilp,
434 void __user *arg)
435 {
436 int error = -ENOMEM;
437 attrlist_cursor_kern_t *cursor;
438 xfs_fsop_attrlist_handlereq_t al_hreq;
439 struct dentry *dentry;
440 char *kbuf;
441
442 if (!capable(CAP_SYS_ADMIN))
443 return -XFS_ERROR(EPERM);
444 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
445 return -XFS_ERROR(EFAULT);
446 if (al_hreq.buflen > XATTR_LIST_MAX)
447 return -XFS_ERROR(EINVAL);
448
449 /*
450 * Reject flags, only allow namespaces.
451 */
452 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
453 return -XFS_ERROR(EINVAL);
454
455 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
456 if (IS_ERR(dentry))
457 return PTR_ERR(dentry);
458
459 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
460 if (!kbuf)
461 goto out_dput;
462
463 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
464 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
465 al_hreq.flags, cursor);
466 if (error)
467 goto out_kfree;
468
469 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
470 error = -EFAULT;
471
472 out_kfree:
473 kmem_free(kbuf);
474 out_dput:
475 dput(dentry);
476 return error;
477 }
478
479 int
480 xfs_attrmulti_attr_get(
481 struct inode *inode,
482 unsigned char *name,
483 unsigned char __user *ubuf,
484 __uint32_t *len,
485 __uint32_t flags)
486 {
487 unsigned char *kbuf;
488 int error = EFAULT;
489
490 if (*len > XATTR_SIZE_MAX)
491 return EINVAL;
492 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
493 if (!kbuf)
494 return ENOMEM;
495
496 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
497 if (error)
498 goto out_kfree;
499
500 if (copy_to_user(ubuf, kbuf, *len))
501 error = EFAULT;
502
503 out_kfree:
504 kmem_free(kbuf);
505 return error;
506 }
507
508 int
509 xfs_attrmulti_attr_set(
510 struct inode *inode,
511 unsigned char *name,
512 const unsigned char __user *ubuf,
513 __uint32_t len,
514 __uint32_t flags)
515 {
516 unsigned char *kbuf;
517 int error = EFAULT;
518
519 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
520 return EPERM;
521 if (len > XATTR_SIZE_MAX)
522 return EINVAL;
523
524 kbuf = memdup_user(ubuf, len);
525 if (IS_ERR(kbuf))
526 return PTR_ERR(kbuf);
527
528 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
529
530 return error;
531 }
532
533 int
534 xfs_attrmulti_attr_remove(
535 struct inode *inode,
536 unsigned char *name,
537 __uint32_t flags)
538 {
539 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
540 return EPERM;
541 return xfs_attr_remove(XFS_I(inode), name, flags);
542 }
543
544 STATIC int
545 xfs_attrmulti_by_handle(
546 struct file *parfilp,
547 void __user *arg)
548 {
549 int error;
550 xfs_attr_multiop_t *ops;
551 xfs_fsop_attrmulti_handlereq_t am_hreq;
552 struct dentry *dentry;
553 unsigned int i, size;
554 unsigned char *attr_name;
555
556 if (!capable(CAP_SYS_ADMIN))
557 return -XFS_ERROR(EPERM);
558 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
559 return -XFS_ERROR(EFAULT);
560
561 /* overflow check */
562 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
563 return -E2BIG;
564
565 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
566 if (IS_ERR(dentry))
567 return PTR_ERR(dentry);
568
569 error = E2BIG;
570 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
571 if (!size || size > 16 * PAGE_SIZE)
572 goto out_dput;
573
574 ops = memdup_user(am_hreq.ops, size);
575 if (IS_ERR(ops)) {
576 error = PTR_ERR(ops);
577 goto out_dput;
578 }
579
580 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
581 if (!attr_name)
582 goto out_kfree_ops;
583
584 error = 0;
585 for (i = 0; i < am_hreq.opcount; i++) {
586 ops[i].am_error = strncpy_from_user((char *)attr_name,
587 ops[i].am_attrname, MAXNAMELEN);
588 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
589 error = -ERANGE;
590 if (ops[i].am_error < 0)
591 break;
592
593 switch (ops[i].am_opcode) {
594 case ATTR_OP_GET:
595 ops[i].am_error = xfs_attrmulti_attr_get(
596 dentry->d_inode, attr_name,
597 ops[i].am_attrvalue, &ops[i].am_length,
598 ops[i].am_flags);
599 break;
600 case ATTR_OP_SET:
601 ops[i].am_error = mnt_want_write_file(parfilp);
602 if (ops[i].am_error)
603 break;
604 ops[i].am_error = xfs_attrmulti_attr_set(
605 dentry->d_inode, attr_name,
606 ops[i].am_attrvalue, ops[i].am_length,
607 ops[i].am_flags);
608 mnt_drop_write_file(parfilp);
609 break;
610 case ATTR_OP_REMOVE:
611 ops[i].am_error = mnt_want_write_file(parfilp);
612 if (ops[i].am_error)
613 break;
614 ops[i].am_error = xfs_attrmulti_attr_remove(
615 dentry->d_inode, attr_name,
616 ops[i].am_flags);
617 mnt_drop_write_file(parfilp);
618 break;
619 default:
620 ops[i].am_error = EINVAL;
621 }
622 }
623
624 if (copy_to_user(am_hreq.ops, ops, size))
625 error = XFS_ERROR(EFAULT);
626
627 kfree(attr_name);
628 out_kfree_ops:
629 kfree(ops);
630 out_dput:
631 dput(dentry);
632 return -error;
633 }
634
635 int
636 xfs_ioc_space(
637 struct xfs_inode *ip,
638 struct inode *inode,
639 struct file *filp,
640 int ioflags,
641 unsigned int cmd,
642 xfs_flock64_t *bf)
643 {
644 int attr_flags = 0;
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 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
665 attr_flags |= XFS_ATTR_NONBLOCK;
666
667 if (filp->f_flags & O_DSYNC)
668 attr_flags |= XFS_ATTR_SYNC;
669
670 if (ioflags & IO_INVIS)
671 attr_flags |= XFS_ATTR_DMI;
672
673 error = mnt_want_write_file(filp);
674 if (error)
675 return error;
676 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
677 mnt_drop_write_file(filp);
678 return -error;
679 }
680
681 STATIC int
682 xfs_ioc_bulkstat(
683 xfs_mount_t *mp,
684 unsigned int cmd,
685 void __user *arg)
686 {
687 xfs_fsop_bulkreq_t bulkreq;
688 int count; /* # of records returned */
689 xfs_ino_t inlast; /* last inode number */
690 int done;
691 int error;
692
693 /* done = 1 if there are more stats to get and if bulkstat */
694 /* should be called again (unused here, but used in dmapi) */
695
696 if (!capable(CAP_SYS_ADMIN))
697 return -EPERM;
698
699 if (XFS_FORCED_SHUTDOWN(mp))
700 return -XFS_ERROR(EIO);
701
702 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
703 return -XFS_ERROR(EFAULT);
704
705 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
706 return -XFS_ERROR(EFAULT);
707
708 if ((count = bulkreq.icount) <= 0)
709 return -XFS_ERROR(EINVAL);
710
711 if (bulkreq.ubuffer == NULL)
712 return -XFS_ERROR(EINVAL);
713
714 if (cmd == XFS_IOC_FSINUMBERS)
715 error = xfs_inumbers(mp, &inlast, &count,
716 bulkreq.ubuffer, xfs_inumbers_fmt);
717 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
718 error = xfs_bulkstat_single(mp, &inlast,
719 bulkreq.ubuffer, &done);
720 else /* XFS_IOC_FSBULKSTAT */
721 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
722 sizeof(xfs_bstat_t), bulkreq.ubuffer,
723 &done);
724
725 if (error)
726 return -error;
727
728 if (bulkreq.ocount != NULL) {
729 if (copy_to_user(bulkreq.lastip, &inlast,
730 sizeof(xfs_ino_t)))
731 return -XFS_ERROR(EFAULT);
732
733 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
734 return -XFS_ERROR(EFAULT);
735 }
736
737 return 0;
738 }
739
740 STATIC int
741 xfs_ioc_fsgeometry_v1(
742 xfs_mount_t *mp,
743 void __user *arg)
744 {
745 xfs_fsop_geom_t fsgeo;
746 int error;
747
748 error = xfs_fs_geometry(mp, &fsgeo, 3);
749 if (error)
750 return -error;
751
752 /*
753 * Caller should have passed an argument of type
754 * xfs_fsop_geom_v1_t. This is a proper subset of the
755 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
756 */
757 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
758 return -XFS_ERROR(EFAULT);
759 return 0;
760 }
761
762 STATIC int
763 xfs_ioc_fsgeometry(
764 xfs_mount_t *mp,
765 void __user *arg)
766 {
767 xfs_fsop_geom_t fsgeo;
768 int error;
769
770 error = xfs_fs_geometry(mp, &fsgeo, 4);
771 if (error)
772 return -error;
773
774 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
775 return -XFS_ERROR(EFAULT);
776 return 0;
777 }
778
779 /*
780 * Linux extended inode flags interface.
781 */
782
783 STATIC unsigned int
784 xfs_merge_ioc_xflags(
785 unsigned int flags,
786 unsigned int start)
787 {
788 unsigned int xflags = start;
789
790 if (flags & FS_IMMUTABLE_FL)
791 xflags |= XFS_XFLAG_IMMUTABLE;
792 else
793 xflags &= ~XFS_XFLAG_IMMUTABLE;
794 if (flags & FS_APPEND_FL)
795 xflags |= XFS_XFLAG_APPEND;
796 else
797 xflags &= ~XFS_XFLAG_APPEND;
798 if (flags & FS_SYNC_FL)
799 xflags |= XFS_XFLAG_SYNC;
800 else
801 xflags &= ~XFS_XFLAG_SYNC;
802 if (flags & FS_NOATIME_FL)
803 xflags |= XFS_XFLAG_NOATIME;
804 else
805 xflags &= ~XFS_XFLAG_NOATIME;
806 if (flags & FS_NODUMP_FL)
807 xflags |= XFS_XFLAG_NODUMP;
808 else
809 xflags &= ~XFS_XFLAG_NODUMP;
810
811 return xflags;
812 }
813
814 STATIC unsigned int
815 xfs_di2lxflags(
816 __uint16_t di_flags)
817 {
818 unsigned int flags = 0;
819
820 if (di_flags & XFS_DIFLAG_IMMUTABLE)
821 flags |= FS_IMMUTABLE_FL;
822 if (di_flags & XFS_DIFLAG_APPEND)
823 flags |= FS_APPEND_FL;
824 if (di_flags & XFS_DIFLAG_SYNC)
825 flags |= FS_SYNC_FL;
826 if (di_flags & XFS_DIFLAG_NOATIME)
827 flags |= FS_NOATIME_FL;
828 if (di_flags & XFS_DIFLAG_NODUMP)
829 flags |= FS_NODUMP_FL;
830 return flags;
831 }
832
833 STATIC int
834 xfs_ioc_fsgetxattr(
835 xfs_inode_t *ip,
836 int attr,
837 void __user *arg)
838 {
839 struct fsxattr fa;
840
841 memset(&fa, 0, sizeof(struct fsxattr));
842
843 xfs_ilock(ip, XFS_ILOCK_SHARED);
844 fa.fsx_xflags = xfs_ip2xflags(ip);
845 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
846 fa.fsx_projid = xfs_get_projid(ip);
847
848 if (attr) {
849 if (ip->i_afp) {
850 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
851 fa.fsx_nextents = ip->i_afp->if_bytes /
852 sizeof(xfs_bmbt_rec_t);
853 else
854 fa.fsx_nextents = ip->i_d.di_anextents;
855 } else
856 fa.fsx_nextents = 0;
857 } else {
858 if (ip->i_df.if_flags & XFS_IFEXTENTS)
859 fa.fsx_nextents = ip->i_df.if_bytes /
860 sizeof(xfs_bmbt_rec_t);
861 else
862 fa.fsx_nextents = ip->i_d.di_nextents;
863 }
864 xfs_iunlock(ip, XFS_ILOCK_SHARED);
865
866 if (copy_to_user(arg, &fa, sizeof(fa)))
867 return -EFAULT;
868 return 0;
869 }
870
871 STATIC void
872 xfs_set_diflags(
873 struct xfs_inode *ip,
874 unsigned int xflags)
875 {
876 unsigned int di_flags;
877
878 /* can't set PREALLOC this way, just preserve it */
879 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
880 if (xflags & XFS_XFLAG_IMMUTABLE)
881 di_flags |= XFS_DIFLAG_IMMUTABLE;
882 if (xflags & XFS_XFLAG_APPEND)
883 di_flags |= XFS_DIFLAG_APPEND;
884 if (xflags & XFS_XFLAG_SYNC)
885 di_flags |= XFS_DIFLAG_SYNC;
886 if (xflags & XFS_XFLAG_NOATIME)
887 di_flags |= XFS_DIFLAG_NOATIME;
888 if (xflags & XFS_XFLAG_NODUMP)
889 di_flags |= XFS_DIFLAG_NODUMP;
890 if (xflags & XFS_XFLAG_PROJINHERIT)
891 di_flags |= XFS_DIFLAG_PROJINHERIT;
892 if (xflags & XFS_XFLAG_NODEFRAG)
893 di_flags |= XFS_DIFLAG_NODEFRAG;
894 if (xflags & XFS_XFLAG_FILESTREAM)
895 di_flags |= XFS_DIFLAG_FILESTREAM;
896 if (S_ISDIR(ip->i_d.di_mode)) {
897 if (xflags & XFS_XFLAG_RTINHERIT)
898 di_flags |= XFS_DIFLAG_RTINHERIT;
899 if (xflags & XFS_XFLAG_NOSYMLINKS)
900 di_flags |= XFS_DIFLAG_NOSYMLINKS;
901 if (xflags & XFS_XFLAG_EXTSZINHERIT)
902 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
903 } else if (S_ISREG(ip->i_d.di_mode)) {
904 if (xflags & XFS_XFLAG_REALTIME)
905 di_flags |= XFS_DIFLAG_REALTIME;
906 if (xflags & XFS_XFLAG_EXTSIZE)
907 di_flags |= XFS_DIFLAG_EXTSIZE;
908 }
909
910 ip->i_d.di_flags = di_flags;
911 }
912
913 STATIC void
914 xfs_diflags_to_linux(
915 struct xfs_inode *ip)
916 {
917 struct inode *inode = VFS_I(ip);
918 unsigned int xflags = xfs_ip2xflags(ip);
919
920 if (xflags & XFS_XFLAG_IMMUTABLE)
921 inode->i_flags |= S_IMMUTABLE;
922 else
923 inode->i_flags &= ~S_IMMUTABLE;
924 if (xflags & XFS_XFLAG_APPEND)
925 inode->i_flags |= S_APPEND;
926 else
927 inode->i_flags &= ~S_APPEND;
928 if (xflags & XFS_XFLAG_SYNC)
929 inode->i_flags |= S_SYNC;
930 else
931 inode->i_flags &= ~S_SYNC;
932 if (xflags & XFS_XFLAG_NOATIME)
933 inode->i_flags |= S_NOATIME;
934 else
935 inode->i_flags &= ~S_NOATIME;
936 }
937
938 #define FSX_PROJID 1
939 #define FSX_EXTSIZE 2
940 #define FSX_XFLAGS 4
941 #define FSX_NONBLOCK 8
942
943 STATIC int
944 xfs_ioctl_setattr(
945 xfs_inode_t *ip,
946 struct fsxattr *fa,
947 int mask)
948 {
949 struct xfs_mount *mp = ip->i_mount;
950 struct xfs_trans *tp;
951 unsigned int lock_flags = 0;
952 struct xfs_dquot *udqp = NULL;
953 struct xfs_dquot *pdqp = NULL;
954 struct xfs_dquot *olddquot = NULL;
955 int code;
956
957 trace_xfs_ioctl_setattr(ip);
958
959 if (mp->m_flags & XFS_MOUNT_RDONLY)
960 return XFS_ERROR(EROFS);
961 if (XFS_FORCED_SHUTDOWN(mp))
962 return XFS_ERROR(EIO);
963
964 /*
965 * Disallow 32bit project ids when projid32bit feature is not enabled.
966 */
967 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
968 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
969 return XFS_ERROR(EINVAL);
970
971 /*
972 * If disk quotas is on, we make sure that the dquots do exist on disk,
973 * before we start any other transactions. Trying to do this later
974 * is messy. We don't care to take a readlock to look at the ids
975 * in inode here, because we can't hold it across the trans_reserve.
976 * If the IDs do change before we take the ilock, we're covered
977 * because the i_*dquot fields will get updated anyway.
978 */
979 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
980 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
981 ip->i_d.di_gid, fa->fsx_projid,
982 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
983 if (code)
984 return code;
985 }
986
987 /*
988 * For the other attributes, we acquire the inode lock and
989 * first do an error checking pass.
990 */
991 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
992 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
993 if (code)
994 goto error_return;
995
996 lock_flags = XFS_ILOCK_EXCL;
997 xfs_ilock(ip, lock_flags);
998
999 /*
1000 * CAP_FOWNER overrides the following restrictions:
1001 *
1002 * The user ID of the calling process must be equal
1003 * to the file owner ID, except in cases where the
1004 * CAP_FSETID capability is applicable.
1005 */
1006 if (!inode_owner_or_capable(VFS_I(ip))) {
1007 code = XFS_ERROR(EPERM);
1008 goto error_return;
1009 }
1010
1011 /*
1012 * Do a quota reservation only if projid is actually going to change.
1013 * Only allow changing of projid from init_user_ns since it is a
1014 * non user namespace aware identifier.
1015 */
1016 if (mask & FSX_PROJID) {
1017 if (current_user_ns() != &init_user_ns) {
1018 code = XFS_ERROR(EINVAL);
1019 goto error_return;
1020 }
1021
1022 if (XFS_IS_QUOTA_RUNNING(mp) &&
1023 XFS_IS_PQUOTA_ON(mp) &&
1024 xfs_get_projid(ip) != fa->fsx_projid) {
1025 ASSERT(tp);
1026 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1027 pdqp, capable(CAP_FOWNER) ?
1028 XFS_QMOPT_FORCE_RES : 0);
1029 if (code) /* out of quota */
1030 goto error_return;
1031 }
1032 }
1033
1034 if (mask & FSX_EXTSIZE) {
1035 /*
1036 * Can't change extent size if any extents are allocated.
1037 */
1038 if (ip->i_d.di_nextents &&
1039 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1040 fa->fsx_extsize)) {
1041 code = XFS_ERROR(EINVAL); /* EFBIG? */
1042 goto error_return;
1043 }
1044
1045 /*
1046 * Extent size must be a multiple of the appropriate block
1047 * size, if set at all. It must also be smaller than the
1048 * maximum extent size supported by the filesystem.
1049 *
1050 * Also, for non-realtime files, limit the extent size hint to
1051 * half the size of the AGs in the filesystem so alignment
1052 * doesn't result in extents larger than an AG.
1053 */
1054 if (fa->fsx_extsize != 0) {
1055 xfs_extlen_t size;
1056 xfs_fsblock_t extsize_fsb;
1057
1058 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1059 if (extsize_fsb > MAXEXTLEN) {
1060 code = XFS_ERROR(EINVAL);
1061 goto error_return;
1062 }
1063
1064 if (XFS_IS_REALTIME_INODE(ip) ||
1065 ((mask & FSX_XFLAGS) &&
1066 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1067 size = mp->m_sb.sb_rextsize <<
1068 mp->m_sb.sb_blocklog;
1069 } else {
1070 size = mp->m_sb.sb_blocksize;
1071 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1072 code = XFS_ERROR(EINVAL);
1073 goto error_return;
1074 }
1075 }
1076
1077 if (fa->fsx_extsize % size) {
1078 code = XFS_ERROR(EINVAL);
1079 goto error_return;
1080 }
1081 }
1082 }
1083
1084
1085 if (mask & FSX_XFLAGS) {
1086 /*
1087 * Can't change realtime flag if any extents are allocated.
1088 */
1089 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1090 (XFS_IS_REALTIME_INODE(ip)) !=
1091 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1092 code = XFS_ERROR(EINVAL); /* EFBIG? */
1093 goto error_return;
1094 }
1095
1096 /*
1097 * If realtime flag is set then must have realtime data.
1098 */
1099 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1100 if ((mp->m_sb.sb_rblocks == 0) ||
1101 (mp->m_sb.sb_rextsize == 0) ||
1102 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1103 code = XFS_ERROR(EINVAL);
1104 goto error_return;
1105 }
1106 }
1107
1108 /*
1109 * Can't modify an immutable/append-only file unless
1110 * we have appropriate permission.
1111 */
1112 if ((ip->i_d.di_flags &
1113 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1114 (fa->fsx_xflags &
1115 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1116 !capable(CAP_LINUX_IMMUTABLE)) {
1117 code = XFS_ERROR(EPERM);
1118 goto error_return;
1119 }
1120 }
1121
1122 xfs_trans_ijoin(tp, ip, 0);
1123
1124 /*
1125 * Change file ownership. Must be the owner or privileged.
1126 */
1127 if (mask & FSX_PROJID) {
1128 /*
1129 * CAP_FSETID overrides the following restrictions:
1130 *
1131 * The set-user-ID and set-group-ID bits of a file will be
1132 * cleared upon successful return from chown()
1133 */
1134 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1135 !inode_capable(VFS_I(ip), CAP_FSETID))
1136 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1137
1138 /*
1139 * Change the ownerships and register quota modifications
1140 * in the transaction.
1141 */
1142 if (xfs_get_projid(ip) != fa->fsx_projid) {
1143 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1144 olddquot = xfs_qm_vop_chown(tp, ip,
1145 &ip->i_pdquot, pdqp);
1146 }
1147 xfs_set_projid(ip, fa->fsx_projid);
1148
1149 /*
1150 * We may have to rev the inode as well as
1151 * the superblock version number since projids didn't
1152 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1153 */
1154 if (ip->i_d.di_version == 1)
1155 xfs_bump_ino_vers2(tp, ip);
1156 }
1157
1158 }
1159
1160 if (mask & FSX_EXTSIZE)
1161 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1162 if (mask & FSX_XFLAGS) {
1163 xfs_set_diflags(ip, fa->fsx_xflags);
1164 xfs_diflags_to_linux(ip);
1165 }
1166
1167 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1168 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1169
1170 XFS_STATS_INC(xs_ig_attrchg);
1171
1172 /*
1173 * If this is a synchronous mount, make sure that the
1174 * transaction goes to disk before returning to the user.
1175 * This is slightly sub-optimal in that truncates require
1176 * two sync transactions instead of one for wsync filesystems.
1177 * One for the truncate and one for the timestamps since we
1178 * don't want to change the timestamps unless we're sure the
1179 * truncate worked. Truncates are less than 1% of the laddis
1180 * mix so this probably isn't worth the trouble to optimize.
1181 */
1182 if (mp->m_flags & XFS_MOUNT_WSYNC)
1183 xfs_trans_set_sync(tp);
1184 code = xfs_trans_commit(tp, 0);
1185 xfs_iunlock(ip, lock_flags);
1186
1187 /*
1188 * Release any dquot(s) the inode had kept before chown.
1189 */
1190 xfs_qm_dqrele(olddquot);
1191 xfs_qm_dqrele(udqp);
1192 xfs_qm_dqrele(pdqp);
1193
1194 return code;
1195
1196 error_return:
1197 xfs_qm_dqrele(udqp);
1198 xfs_qm_dqrele(pdqp);
1199 xfs_trans_cancel(tp, 0);
1200 if (lock_flags)
1201 xfs_iunlock(ip, lock_flags);
1202 return code;
1203 }
1204
1205 STATIC int
1206 xfs_ioc_fssetxattr(
1207 xfs_inode_t *ip,
1208 struct file *filp,
1209 void __user *arg)
1210 {
1211 struct fsxattr fa;
1212 unsigned int mask;
1213 int error;
1214
1215 if (copy_from_user(&fa, arg, sizeof(fa)))
1216 return -EFAULT;
1217
1218 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1219 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1220 mask |= FSX_NONBLOCK;
1221
1222 error = mnt_want_write_file(filp);
1223 if (error)
1224 return error;
1225 error = xfs_ioctl_setattr(ip, &fa, mask);
1226 mnt_drop_write_file(filp);
1227 return -error;
1228 }
1229
1230 STATIC int
1231 xfs_ioc_getxflags(
1232 xfs_inode_t *ip,
1233 void __user *arg)
1234 {
1235 unsigned int flags;
1236
1237 flags = xfs_di2lxflags(ip->i_d.di_flags);
1238 if (copy_to_user(arg, &flags, sizeof(flags)))
1239 return -EFAULT;
1240 return 0;
1241 }
1242
1243 STATIC int
1244 xfs_ioc_setxflags(
1245 xfs_inode_t *ip,
1246 struct file *filp,
1247 void __user *arg)
1248 {
1249 struct fsxattr fa;
1250 unsigned int flags;
1251 unsigned int mask;
1252 int error;
1253
1254 if (copy_from_user(&flags, arg, sizeof(flags)))
1255 return -EFAULT;
1256
1257 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1258 FS_NOATIME_FL | FS_NODUMP_FL | \
1259 FS_SYNC_FL))
1260 return -EOPNOTSUPP;
1261
1262 mask = FSX_XFLAGS;
1263 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1264 mask |= FSX_NONBLOCK;
1265 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1266
1267 error = mnt_want_write_file(filp);
1268 if (error)
1269 return error;
1270 error = xfs_ioctl_setattr(ip, &fa, mask);
1271 mnt_drop_write_file(filp);
1272 return -error;
1273 }
1274
1275 STATIC int
1276 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1277 {
1278 struct getbmap __user *base = *ap;
1279
1280 /* copy only getbmap portion (not getbmapx) */
1281 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1282 return XFS_ERROR(EFAULT);
1283
1284 *ap += sizeof(struct getbmap);
1285 return 0;
1286 }
1287
1288 STATIC int
1289 xfs_ioc_getbmap(
1290 struct xfs_inode *ip,
1291 int ioflags,
1292 unsigned int cmd,
1293 void __user *arg)
1294 {
1295 struct getbmapx bmx;
1296 int error;
1297
1298 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1299 return -XFS_ERROR(EFAULT);
1300
1301 if (bmx.bmv_count < 2)
1302 return -XFS_ERROR(EINVAL);
1303
1304 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1305 if (ioflags & IO_INVIS)
1306 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1307
1308 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1309 (struct getbmap *)arg+1);
1310 if (error)
1311 return -error;
1312
1313 /* copy back header - only size of getbmap */
1314 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1315 return -XFS_ERROR(EFAULT);
1316 return 0;
1317 }
1318
1319 STATIC int
1320 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1321 {
1322 struct getbmapx __user *base = *ap;
1323
1324 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1325 return XFS_ERROR(EFAULT);
1326
1327 *ap += sizeof(struct getbmapx);
1328 return 0;
1329 }
1330
1331 STATIC int
1332 xfs_ioc_getbmapx(
1333 struct xfs_inode *ip,
1334 void __user *arg)
1335 {
1336 struct getbmapx bmx;
1337 int error;
1338
1339 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1340 return -XFS_ERROR(EFAULT);
1341
1342 if (bmx.bmv_count < 2)
1343 return -XFS_ERROR(EINVAL);
1344
1345 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1346 return -XFS_ERROR(EINVAL);
1347
1348 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1349 (struct getbmapx *)arg+1);
1350 if (error)
1351 return -error;
1352
1353 /* copy back header */
1354 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1355 return -XFS_ERROR(EFAULT);
1356
1357 return 0;
1358 }
1359
1360 int
1361 xfs_ioc_swapext(
1362 xfs_swapext_t *sxp)
1363 {
1364 xfs_inode_t *ip, *tip;
1365 struct fd f, tmp;
1366 int error = 0;
1367
1368 /* Pull information for the target fd */
1369 f = fdget((int)sxp->sx_fdtarget);
1370 if (!f.file) {
1371 error = XFS_ERROR(EINVAL);
1372 goto out;
1373 }
1374
1375 if (!(f.file->f_mode & FMODE_WRITE) ||
1376 !(f.file->f_mode & FMODE_READ) ||
1377 (f.file->f_flags & O_APPEND)) {
1378 error = XFS_ERROR(EBADF);
1379 goto out_put_file;
1380 }
1381
1382 tmp = fdget((int)sxp->sx_fdtmp);
1383 if (!tmp.file) {
1384 error = XFS_ERROR(EINVAL);
1385 goto out_put_file;
1386 }
1387
1388 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1389 !(tmp.file->f_mode & FMODE_READ) ||
1390 (tmp.file->f_flags & O_APPEND)) {
1391 error = XFS_ERROR(EBADF);
1392 goto out_put_tmp_file;
1393 }
1394
1395 if (IS_SWAPFILE(file_inode(f.file)) ||
1396 IS_SWAPFILE(file_inode(tmp.file))) {
1397 error = XFS_ERROR(EINVAL);
1398 goto out_put_tmp_file;
1399 }
1400
1401 ip = XFS_I(file_inode(f.file));
1402 tip = XFS_I(file_inode(tmp.file));
1403
1404 if (ip->i_mount != tip->i_mount) {
1405 error = XFS_ERROR(EINVAL);
1406 goto out_put_tmp_file;
1407 }
1408
1409 if (ip->i_ino == tip->i_ino) {
1410 error = XFS_ERROR(EINVAL);
1411 goto out_put_tmp_file;
1412 }
1413
1414 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1415 error = XFS_ERROR(EIO);
1416 goto out_put_tmp_file;
1417 }
1418
1419 error = xfs_swap_extents(ip, tip, sxp);
1420
1421 out_put_tmp_file:
1422 fdput(tmp);
1423 out_put_file:
1424 fdput(f);
1425 out:
1426 return error;
1427 }
1428
1429 /*
1430 * Note: some of the ioctl's return positive numbers as a
1431 * byte count indicating success, such as readlink_by_handle.
1432 * So we don't "sign flip" like most other routines. This means
1433 * true errors need to be returned as a negative value.
1434 */
1435 long
1436 xfs_file_ioctl(
1437 struct file *filp,
1438 unsigned int cmd,
1439 unsigned long p)
1440 {
1441 struct inode *inode = file_inode(filp);
1442 struct xfs_inode *ip = XFS_I(inode);
1443 struct xfs_mount *mp = ip->i_mount;
1444 void __user *arg = (void __user *)p;
1445 int ioflags = 0;
1446 int error;
1447
1448 if (filp->f_mode & FMODE_NOCMTIME)
1449 ioflags |= IO_INVIS;
1450
1451 trace_xfs_file_ioctl(ip);
1452
1453 switch (cmd) {
1454 case FITRIM:
1455 return xfs_ioc_trim(mp, arg);
1456 case XFS_IOC_ALLOCSP:
1457 case XFS_IOC_FREESP:
1458 case XFS_IOC_RESVSP:
1459 case XFS_IOC_UNRESVSP:
1460 case XFS_IOC_ALLOCSP64:
1461 case XFS_IOC_FREESP64:
1462 case XFS_IOC_RESVSP64:
1463 case XFS_IOC_UNRESVSP64:
1464 case XFS_IOC_ZERO_RANGE: {
1465 xfs_flock64_t bf;
1466
1467 if (copy_from_user(&bf, arg, sizeof(bf)))
1468 return -XFS_ERROR(EFAULT);
1469 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1470 }
1471 case XFS_IOC_DIOINFO: {
1472 struct dioattr da;
1473 xfs_buftarg_t *target =
1474 XFS_IS_REALTIME_INODE(ip) ?
1475 mp->m_rtdev_targp : mp->m_ddev_targp;
1476
1477 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1478 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1479
1480 if (copy_to_user(arg, &da, sizeof(da)))
1481 return -XFS_ERROR(EFAULT);
1482 return 0;
1483 }
1484
1485 case XFS_IOC_FSBULKSTAT_SINGLE:
1486 case XFS_IOC_FSBULKSTAT:
1487 case XFS_IOC_FSINUMBERS:
1488 return xfs_ioc_bulkstat(mp, cmd, arg);
1489
1490 case XFS_IOC_FSGEOMETRY_V1:
1491 return xfs_ioc_fsgeometry_v1(mp, arg);
1492
1493 case XFS_IOC_FSGEOMETRY:
1494 return xfs_ioc_fsgeometry(mp, arg);
1495
1496 case XFS_IOC_GETVERSION:
1497 return put_user(inode->i_generation, (int __user *)arg);
1498
1499 case XFS_IOC_FSGETXATTR:
1500 return xfs_ioc_fsgetxattr(ip, 0, arg);
1501 case XFS_IOC_FSGETXATTRA:
1502 return xfs_ioc_fsgetxattr(ip, 1, arg);
1503 case XFS_IOC_FSSETXATTR:
1504 return xfs_ioc_fssetxattr(ip, filp, arg);
1505 case XFS_IOC_GETXFLAGS:
1506 return xfs_ioc_getxflags(ip, arg);
1507 case XFS_IOC_SETXFLAGS:
1508 return xfs_ioc_setxflags(ip, filp, arg);
1509
1510 case XFS_IOC_FSSETDM: {
1511 struct fsdmidata dmi;
1512
1513 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1514 return -XFS_ERROR(EFAULT);
1515
1516 error = mnt_want_write_file(filp);
1517 if (error)
1518 return error;
1519
1520 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1521 dmi.fsd_dmstate);
1522 mnt_drop_write_file(filp);
1523 return -error;
1524 }
1525
1526 case XFS_IOC_GETBMAP:
1527 case XFS_IOC_GETBMAPA:
1528 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1529
1530 case XFS_IOC_GETBMAPX:
1531 return xfs_ioc_getbmapx(ip, arg);
1532
1533 case XFS_IOC_FD_TO_HANDLE:
1534 case XFS_IOC_PATH_TO_HANDLE:
1535 case XFS_IOC_PATH_TO_FSHANDLE: {
1536 xfs_fsop_handlereq_t hreq;
1537
1538 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1539 return -XFS_ERROR(EFAULT);
1540 return xfs_find_handle(cmd, &hreq);
1541 }
1542 case XFS_IOC_OPEN_BY_HANDLE: {
1543 xfs_fsop_handlereq_t hreq;
1544
1545 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1546 return -XFS_ERROR(EFAULT);
1547 return xfs_open_by_handle(filp, &hreq);
1548 }
1549 case XFS_IOC_FSSETDM_BY_HANDLE:
1550 return xfs_fssetdm_by_handle(filp, arg);
1551
1552 case XFS_IOC_READLINK_BY_HANDLE: {
1553 xfs_fsop_handlereq_t hreq;
1554
1555 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1556 return -XFS_ERROR(EFAULT);
1557 return xfs_readlink_by_handle(filp, &hreq);
1558 }
1559 case XFS_IOC_ATTRLIST_BY_HANDLE:
1560 return xfs_attrlist_by_handle(filp, arg);
1561
1562 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1563 return xfs_attrmulti_by_handle(filp, arg);
1564
1565 case XFS_IOC_SWAPEXT: {
1566 struct xfs_swapext sxp;
1567
1568 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1569 return -XFS_ERROR(EFAULT);
1570 error = mnt_want_write_file(filp);
1571 if (error)
1572 return error;
1573 error = xfs_ioc_swapext(&sxp);
1574 mnt_drop_write_file(filp);
1575 return -error;
1576 }
1577
1578 case XFS_IOC_FSCOUNTS: {
1579 xfs_fsop_counts_t out;
1580
1581 error = xfs_fs_counts(mp, &out);
1582 if (error)
1583 return -error;
1584
1585 if (copy_to_user(arg, &out, sizeof(out)))
1586 return -XFS_ERROR(EFAULT);
1587 return 0;
1588 }
1589
1590 case XFS_IOC_SET_RESBLKS: {
1591 xfs_fsop_resblks_t inout;
1592 __uint64_t in;
1593
1594 if (!capable(CAP_SYS_ADMIN))
1595 return -EPERM;
1596
1597 if (mp->m_flags & XFS_MOUNT_RDONLY)
1598 return -XFS_ERROR(EROFS);
1599
1600 if (copy_from_user(&inout, arg, sizeof(inout)))
1601 return -XFS_ERROR(EFAULT);
1602
1603 error = mnt_want_write_file(filp);
1604 if (error)
1605 return error;
1606
1607 /* input parameter is passed in resblks field of structure */
1608 in = inout.resblks;
1609 error = xfs_reserve_blocks(mp, &in, &inout);
1610 mnt_drop_write_file(filp);
1611 if (error)
1612 return -error;
1613
1614 if (copy_to_user(arg, &inout, sizeof(inout)))
1615 return -XFS_ERROR(EFAULT);
1616 return 0;
1617 }
1618
1619 case XFS_IOC_GET_RESBLKS: {
1620 xfs_fsop_resblks_t out;
1621
1622 if (!capable(CAP_SYS_ADMIN))
1623 return -EPERM;
1624
1625 error = xfs_reserve_blocks(mp, NULL, &out);
1626 if (error)
1627 return -error;
1628
1629 if (copy_to_user(arg, &out, sizeof(out)))
1630 return -XFS_ERROR(EFAULT);
1631
1632 return 0;
1633 }
1634
1635 case XFS_IOC_FSGROWFSDATA: {
1636 xfs_growfs_data_t in;
1637
1638 if (copy_from_user(&in, arg, sizeof(in)))
1639 return -XFS_ERROR(EFAULT);
1640
1641 error = mnt_want_write_file(filp);
1642 if (error)
1643 return error;
1644 error = xfs_growfs_data(mp, &in);
1645 mnt_drop_write_file(filp);
1646 return -error;
1647 }
1648
1649 case XFS_IOC_FSGROWFSLOG: {
1650 xfs_growfs_log_t in;
1651
1652 if (copy_from_user(&in, arg, sizeof(in)))
1653 return -XFS_ERROR(EFAULT);
1654
1655 error = mnt_want_write_file(filp);
1656 if (error)
1657 return error;
1658 error = xfs_growfs_log(mp, &in);
1659 mnt_drop_write_file(filp);
1660 return -error;
1661 }
1662
1663 case XFS_IOC_FSGROWFSRT: {
1664 xfs_growfs_rt_t in;
1665
1666 if (copy_from_user(&in, arg, sizeof(in)))
1667 return -XFS_ERROR(EFAULT);
1668
1669 error = mnt_want_write_file(filp);
1670 if (error)
1671 return error;
1672 error = xfs_growfs_rt(mp, &in);
1673 mnt_drop_write_file(filp);
1674 return -error;
1675 }
1676
1677 case XFS_IOC_GOINGDOWN: {
1678 __uint32_t in;
1679
1680 if (!capable(CAP_SYS_ADMIN))
1681 return -EPERM;
1682
1683 if (get_user(in, (__uint32_t __user *)arg))
1684 return -XFS_ERROR(EFAULT);
1685
1686 error = xfs_fs_goingdown(mp, in);
1687 return -error;
1688 }
1689
1690 case XFS_IOC_ERROR_INJECTION: {
1691 xfs_error_injection_t in;
1692
1693 if (!capable(CAP_SYS_ADMIN))
1694 return -EPERM;
1695
1696 if (copy_from_user(&in, arg, sizeof(in)))
1697 return -XFS_ERROR(EFAULT);
1698
1699 error = xfs_errortag_add(in.errtag, mp);
1700 return -error;
1701 }
1702
1703 case XFS_IOC_ERROR_CLEARALL:
1704 if (!capable(CAP_SYS_ADMIN))
1705 return -EPERM;
1706
1707 error = xfs_errortag_clearall(mp, 1);
1708 return -error;
1709
1710 case XFS_IOC_FREE_EOFBLOCKS: {
1711 struct xfs_fs_eofblocks eofb;
1712 struct xfs_eofblocks keofb;
1713
1714 if (!capable(CAP_SYS_ADMIN))
1715 return -EPERM;
1716
1717 if (mp->m_flags & XFS_MOUNT_RDONLY)
1718 return -XFS_ERROR(EROFS);
1719
1720 if (!capable(CAP_SYS_ADMIN))
1721 return -EPERM;
1722
1723 if (mp->m_flags & XFS_MOUNT_RDONLY)
1724 return -XFS_ERROR(EROFS);
1725
1726 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1727 return -XFS_ERROR(EFAULT);
1728
1729 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1730 if (error)
1731 return -error;
1732
1733 return -xfs_icache_free_eofblocks(mp, &keofb);
1734 }
1735
1736 default:
1737 return -ENOTTY;
1738 }
1739 }
Linux with added FPC-III support