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Linux 3.12.39
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blob52b5375faedc0db0fc73a8f6e176bd39337b172e
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 < sizeof(struct attrlist) ||
447 al_hreq.buflen > XATTR_LIST_MAX)
448 return -XFS_ERROR(EINVAL);
449
450 /*
451 * Reject flags, only allow namespaces.
452 */
453 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
454 return -XFS_ERROR(EINVAL);
455
456 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
457 if (IS_ERR(dentry))
458 return PTR_ERR(dentry);
459
460 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
461 if (!kbuf)
462 goto out_dput;
463
464 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
465 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
466 al_hreq.flags, cursor);
467 if (error)
468 goto out_kfree;
469
470 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
471 error = -EFAULT;
472
473 out_kfree:
474 kmem_free(kbuf);
475 out_dput:
476 dput(dentry);
477 return error;
478 }
479
480 int
481 xfs_attrmulti_attr_get(
482 struct inode *inode,
483 unsigned char *name,
484 unsigned char __user *ubuf,
485 __uint32_t *len,
486 __uint32_t flags)
487 {
488 unsigned char *kbuf;
489 int error = EFAULT;
490
491 if (*len > XATTR_SIZE_MAX)
492 return EINVAL;
493 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
494 if (!kbuf)
495 return ENOMEM;
496
497 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
498 if (error)
499 goto out_kfree;
500
501 if (copy_to_user(ubuf, kbuf, *len))
502 error = EFAULT;
503
504 out_kfree:
505 kmem_free(kbuf);
506 return error;
507 }
508
509 int
510 xfs_attrmulti_attr_set(
511 struct inode *inode,
512 unsigned char *name,
513 const unsigned char __user *ubuf,
514 __uint32_t len,
515 __uint32_t flags)
516 {
517 unsigned char *kbuf;
518 int error = EFAULT;
519
520 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
521 return EPERM;
522 if (len > XATTR_SIZE_MAX)
523 return EINVAL;
524
525 kbuf = memdup_user(ubuf, len);
526 if (IS_ERR(kbuf))
527 return PTR_ERR(kbuf);
528
529 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
530
531 return error;
532 }
533
534 int
535 xfs_attrmulti_attr_remove(
536 struct inode *inode,
537 unsigned char *name,
538 __uint32_t flags)
539 {
540 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
541 return EPERM;
542 return xfs_attr_remove(XFS_I(inode), name, flags);
543 }
544
545 STATIC int
546 xfs_attrmulti_by_handle(
547 struct file *parfilp,
548 void __user *arg)
549 {
550 int error;
551 xfs_attr_multiop_t *ops;
552 xfs_fsop_attrmulti_handlereq_t am_hreq;
553 struct dentry *dentry;
554 unsigned int i, size;
555 unsigned char *attr_name;
556
557 if (!capable(CAP_SYS_ADMIN))
558 return -XFS_ERROR(EPERM);
559 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
560 return -XFS_ERROR(EFAULT);
561
562 /* overflow check */
563 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
564 return -E2BIG;
565
566 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
567 if (IS_ERR(dentry))
568 return PTR_ERR(dentry);
569
570 error = E2BIG;
571 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
572 if (!size || size > 16 * PAGE_SIZE)
573 goto out_dput;
574
575 ops = memdup_user(am_hreq.ops, size);
576 if (IS_ERR(ops)) {
577 error = PTR_ERR(ops);
578 goto out_dput;
579 }
580
581 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
582 if (!attr_name)
583 goto out_kfree_ops;
584
585 error = 0;
586 for (i = 0; i < am_hreq.opcount; i++) {
587 ops[i].am_error = strncpy_from_user((char *)attr_name,
588 ops[i].am_attrname, MAXNAMELEN);
589 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
590 error = -ERANGE;
591 if (ops[i].am_error < 0)
592 break;
593
594 switch (ops[i].am_opcode) {
595 case ATTR_OP_GET:
596 ops[i].am_error = xfs_attrmulti_attr_get(
597 dentry->d_inode, attr_name,
598 ops[i].am_attrvalue, &ops[i].am_length,
599 ops[i].am_flags);
600 break;
601 case ATTR_OP_SET:
602 ops[i].am_error = mnt_want_write_file(parfilp);
603 if (ops[i].am_error)
604 break;
605 ops[i].am_error = xfs_attrmulti_attr_set(
606 dentry->d_inode, attr_name,
607 ops[i].am_attrvalue, ops[i].am_length,
608 ops[i].am_flags);
609 mnt_drop_write_file(parfilp);
610 break;
611 case ATTR_OP_REMOVE:
612 ops[i].am_error = mnt_want_write_file(parfilp);
613 if (ops[i].am_error)
614 break;
615 ops[i].am_error = xfs_attrmulti_attr_remove(
616 dentry->d_inode, attr_name,
617 ops[i].am_flags);
618 mnt_drop_write_file(parfilp);
619 break;
620 default:
621 ops[i].am_error = EINVAL;
622 }
623 }
624
625 if (copy_to_user(am_hreq.ops, ops, size))
626 error = XFS_ERROR(EFAULT);
627
628 kfree(attr_name);
629 out_kfree_ops:
630 kfree(ops);
631 out_dput:
632 dput(dentry);
633 return -error;
634 }
635
636 int
637 xfs_ioc_space(
638 struct xfs_inode *ip,
639 struct inode *inode,
640 struct file *filp,
641 int ioflags,
642 unsigned int cmd,
643 xfs_flock64_t *bf)
644 {
645 int attr_flags = 0;
646 int error;
647
648 /*
649 * Only allow the sys admin to reserve space unless
650 * unwritten extents are enabled.
651 */
652 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
653 !capable(CAP_SYS_ADMIN))
654 return -XFS_ERROR(EPERM);
655
656 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
657 return -XFS_ERROR(EPERM);
658
659 if (!(filp->f_mode & FMODE_WRITE))
660 return -XFS_ERROR(EBADF);
661
662 if (!S_ISREG(inode->i_mode))
663 return -XFS_ERROR(EINVAL);
664
665 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
666 attr_flags |= XFS_ATTR_NONBLOCK;
667
668 if (filp->f_flags & O_DSYNC)
669 attr_flags |= XFS_ATTR_SYNC;
670
671 if (ioflags & IO_INVIS)
672 attr_flags |= XFS_ATTR_DMI;
673
674 error = mnt_want_write_file(filp);
675 if (error)
676 return error;
677 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
678 mnt_drop_write_file(filp);
679 return -error;
680 }
681
682 STATIC int
683 xfs_ioc_bulkstat(
684 xfs_mount_t *mp,
685 unsigned int cmd,
686 void __user *arg)
687 {
688 xfs_fsop_bulkreq_t bulkreq;
689 int count; /* # of records returned */
690 xfs_ino_t inlast; /* last inode number */
691 int done;
692 int error;
693
694 /* done = 1 if there are more stats to get and if bulkstat */
695 /* should be called again (unused here, but used in dmapi) */
696
697 if (!capable(CAP_SYS_ADMIN))
698 return -EPERM;
699
700 if (XFS_FORCED_SHUTDOWN(mp))
701 return -XFS_ERROR(EIO);
702
703 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
704 return -XFS_ERROR(EFAULT);
705
706 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
707 return -XFS_ERROR(EFAULT);
708
709 if ((count = bulkreq.icount) <= 0)
710 return -XFS_ERROR(EINVAL);
711
712 if (bulkreq.ubuffer == NULL)
713 return -XFS_ERROR(EINVAL);
714
715 if (cmd == XFS_IOC_FSINUMBERS)
716 error = xfs_inumbers(mp, &inlast, &count,
717 bulkreq.ubuffer, xfs_inumbers_fmt);
718 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
719 error = xfs_bulkstat_single(mp, &inlast,
720 bulkreq.ubuffer, &done);
721 else /* XFS_IOC_FSBULKSTAT */
722 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
723 sizeof(xfs_bstat_t), bulkreq.ubuffer,
724 &done);
725
726 if (error)
727 return -error;
728
729 if (bulkreq.ocount != NULL) {
730 if (copy_to_user(bulkreq.lastip, &inlast,
731 sizeof(xfs_ino_t)))
732 return -XFS_ERROR(EFAULT);
733
734 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
735 return -XFS_ERROR(EFAULT);
736 }
737
738 return 0;
739 }
740
741 STATIC int
742 xfs_ioc_fsgeometry_v1(
743 xfs_mount_t *mp,
744 void __user *arg)
745 {
746 xfs_fsop_geom_t fsgeo;
747 int error;
748
749 error = xfs_fs_geometry(mp, &fsgeo, 3);
750 if (error)
751 return -error;
752
753 /*
754 * Caller should have passed an argument of type
755 * xfs_fsop_geom_v1_t. This is a proper subset of the
756 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
757 */
758 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
759 return -XFS_ERROR(EFAULT);
760 return 0;
761 }
762
763 STATIC int
764 xfs_ioc_fsgeometry(
765 xfs_mount_t *mp,
766 void __user *arg)
767 {
768 xfs_fsop_geom_t fsgeo;
769 int error;
770
771 error = xfs_fs_geometry(mp, &fsgeo, 4);
772 if (error)
773 return -error;
774
775 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
776 return -XFS_ERROR(EFAULT);
777 return 0;
778 }
779
780 /*
781 * Linux extended inode flags interface.
782 */
783
784 STATIC unsigned int
785 xfs_merge_ioc_xflags(
786 unsigned int flags,
787 unsigned int start)
788 {
789 unsigned int xflags = start;
790
791 if (flags & FS_IMMUTABLE_FL)
792 xflags |= XFS_XFLAG_IMMUTABLE;
793 else
794 xflags &= ~XFS_XFLAG_IMMUTABLE;
795 if (flags & FS_APPEND_FL)
796 xflags |= XFS_XFLAG_APPEND;
797 else
798 xflags &= ~XFS_XFLAG_APPEND;
799 if (flags & FS_SYNC_FL)
800 xflags |= XFS_XFLAG_SYNC;
801 else
802 xflags &= ~XFS_XFLAG_SYNC;
803 if (flags & FS_NOATIME_FL)
804 xflags |= XFS_XFLAG_NOATIME;
805 else
806 xflags &= ~XFS_XFLAG_NOATIME;
807 if (flags & FS_NODUMP_FL)
808 xflags |= XFS_XFLAG_NODUMP;
809 else
810 xflags &= ~XFS_XFLAG_NODUMP;
811
812 return xflags;
813 }
814
815 STATIC unsigned int
816 xfs_di2lxflags(
817 __uint16_t di_flags)
818 {
819 unsigned int flags = 0;
820
821 if (di_flags & XFS_DIFLAG_IMMUTABLE)
822 flags |= FS_IMMUTABLE_FL;
823 if (di_flags & XFS_DIFLAG_APPEND)
824 flags |= FS_APPEND_FL;
825 if (di_flags & XFS_DIFLAG_SYNC)
826 flags |= FS_SYNC_FL;
827 if (di_flags & XFS_DIFLAG_NOATIME)
828 flags |= FS_NOATIME_FL;
829 if (di_flags & XFS_DIFLAG_NODUMP)
830 flags |= FS_NODUMP_FL;
831 return flags;
832 }
833
834 STATIC int
835 xfs_ioc_fsgetxattr(
836 xfs_inode_t *ip,
837 int attr,
838 void __user *arg)
839 {
840 struct fsxattr fa;
841
842 memset(&fa, 0, sizeof(struct fsxattr));
843
844 xfs_ilock(ip, XFS_ILOCK_SHARED);
845 fa.fsx_xflags = xfs_ip2xflags(ip);
846 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
847 fa.fsx_projid = xfs_get_projid(ip);
848
849 if (attr) {
850 if (ip->i_afp) {
851 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
852 fa.fsx_nextents = ip->i_afp->if_bytes /
853 sizeof(xfs_bmbt_rec_t);
854 else
855 fa.fsx_nextents = ip->i_d.di_anextents;
856 } else
857 fa.fsx_nextents = 0;
858 } else {
859 if (ip->i_df.if_flags & XFS_IFEXTENTS)
860 fa.fsx_nextents = ip->i_df.if_bytes /
861 sizeof(xfs_bmbt_rec_t);
862 else
863 fa.fsx_nextents = ip->i_d.di_nextents;
864 }
865 xfs_iunlock(ip, XFS_ILOCK_SHARED);
866
867 if (copy_to_user(arg, &fa, sizeof(fa)))
868 return -EFAULT;
869 return 0;
870 }
871
872 STATIC void
873 xfs_set_diflags(
874 struct xfs_inode *ip,
875 unsigned int xflags)
876 {
877 unsigned int di_flags;
878
879 /* can't set PREALLOC this way, just preserve it */
880 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
881 if (xflags & XFS_XFLAG_IMMUTABLE)
882 di_flags |= XFS_DIFLAG_IMMUTABLE;
883 if (xflags & XFS_XFLAG_APPEND)
884 di_flags |= XFS_DIFLAG_APPEND;
885 if (xflags & XFS_XFLAG_SYNC)
886 di_flags |= XFS_DIFLAG_SYNC;
887 if (xflags & XFS_XFLAG_NOATIME)
888 di_flags |= XFS_DIFLAG_NOATIME;
889 if (xflags & XFS_XFLAG_NODUMP)
890 di_flags |= XFS_DIFLAG_NODUMP;
891 if (xflags & XFS_XFLAG_PROJINHERIT)
892 di_flags |= XFS_DIFLAG_PROJINHERIT;
893 if (xflags & XFS_XFLAG_NODEFRAG)
894 di_flags |= XFS_DIFLAG_NODEFRAG;
895 if (xflags & XFS_XFLAG_FILESTREAM)
896 di_flags |= XFS_DIFLAG_FILESTREAM;
897 if (S_ISDIR(ip->i_d.di_mode)) {
898 if (xflags & XFS_XFLAG_RTINHERIT)
899 di_flags |= XFS_DIFLAG_RTINHERIT;
900 if (xflags & XFS_XFLAG_NOSYMLINKS)
901 di_flags |= XFS_DIFLAG_NOSYMLINKS;
902 if (xflags & XFS_XFLAG_EXTSZINHERIT)
903 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
904 } else if (S_ISREG(ip->i_d.di_mode)) {
905 if (xflags & XFS_XFLAG_REALTIME)
906 di_flags |= XFS_DIFLAG_REALTIME;
907 if (xflags & XFS_XFLAG_EXTSIZE)
908 di_flags |= XFS_DIFLAG_EXTSIZE;
909 }
910
911 ip->i_d.di_flags = di_flags;
912 }
913
914 STATIC void
915 xfs_diflags_to_linux(
916 struct xfs_inode *ip)
917 {
918 struct inode *inode = VFS_I(ip);
919 unsigned int xflags = xfs_ip2xflags(ip);
920
921 if (xflags & XFS_XFLAG_IMMUTABLE)
922 inode->i_flags |= S_IMMUTABLE;
923 else
924 inode->i_flags &= ~S_IMMUTABLE;
925 if (xflags & XFS_XFLAG_APPEND)
926 inode->i_flags |= S_APPEND;
927 else
928 inode->i_flags &= ~S_APPEND;
929 if (xflags & XFS_XFLAG_SYNC)
930 inode->i_flags |= S_SYNC;
931 else
932 inode->i_flags &= ~S_SYNC;
933 if (xflags & XFS_XFLAG_NOATIME)
934 inode->i_flags |= S_NOATIME;
935 else
936 inode->i_flags &= ~S_NOATIME;
937 }
938
939 #define FSX_PROJID 1
940 #define FSX_EXTSIZE 2
941 #define FSX_XFLAGS 4
942 #define FSX_NONBLOCK 8
943
944 STATIC int
945 xfs_ioctl_setattr(
946 xfs_inode_t *ip,
947 struct fsxattr *fa,
948 int mask)
949 {
950 struct xfs_mount *mp = ip->i_mount;
951 struct xfs_trans *tp;
952 unsigned int lock_flags = 0;
953 struct xfs_dquot *udqp = NULL;
954 struct xfs_dquot *pdqp = NULL;
955 struct xfs_dquot *olddquot = NULL;
956 int code;
957
958 trace_xfs_ioctl_setattr(ip);
959
960 if (mp->m_flags & XFS_MOUNT_RDONLY)
961 return XFS_ERROR(EROFS);
962 if (XFS_FORCED_SHUTDOWN(mp))
963 return XFS_ERROR(EIO);
964
965 /*
966 * Disallow 32bit project ids when projid32bit feature is not enabled.
967 */
968 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
969 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
970 return XFS_ERROR(EINVAL);
971
972 /*
973 * If disk quotas is on, we make sure that the dquots do exist on disk,
974 * before we start any other transactions. Trying to do this later
975 * is messy. We don't care to take a readlock to look at the ids
976 * in inode here, because we can't hold it across the trans_reserve.
977 * If the IDs do change before we take the ilock, we're covered
978 * because the i_*dquot fields will get updated anyway.
979 */
980 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
981 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
982 ip->i_d.di_gid, fa->fsx_projid,
983 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
984 if (code)
985 return code;
986 }
987
988 /*
989 * For the other attributes, we acquire the inode lock and
990 * first do an error checking pass.
991 */
992 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
993 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
994 if (code)
995 goto error_return;
996
997 lock_flags = XFS_ILOCK_EXCL;
998 xfs_ilock(ip, lock_flags);
999
1000 /*
1001 * CAP_FOWNER overrides the following restrictions:
1002 *
1003 * The user ID of the calling process must be equal
1004 * to the file owner ID, except in cases where the
1005 * CAP_FSETID capability is applicable.
1006 */
1007 if (!inode_owner_or_capable(VFS_I(ip))) {
1008 code = XFS_ERROR(EPERM);
1009 goto error_return;
1010 }
1011
1012 /*
1013 * Do a quota reservation only if projid is actually going to change.
1014 * Only allow changing of projid from init_user_ns since it is a
1015 * non user namespace aware identifier.
1016 */
1017 if (mask & FSX_PROJID) {
1018 if (current_user_ns() != &init_user_ns) {
1019 code = XFS_ERROR(EINVAL);
1020 goto error_return;
1021 }
1022
1023 if (XFS_IS_QUOTA_RUNNING(mp) &&
1024 XFS_IS_PQUOTA_ON(mp) &&
1025 xfs_get_projid(ip) != fa->fsx_projid) {
1026 ASSERT(tp);
1027 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1028 pdqp, capable(CAP_FOWNER) ?
1029 XFS_QMOPT_FORCE_RES : 0);
1030 if (code) /* out of quota */
1031 goto error_return;
1032 }
1033 }
1034
1035 if (mask & FSX_EXTSIZE) {
1036 /*
1037 * Can't change extent size if any extents are allocated.
1038 */
1039 if (ip->i_d.di_nextents &&
1040 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1041 fa->fsx_extsize)) {
1042 code = XFS_ERROR(EINVAL); /* EFBIG? */
1043 goto error_return;
1044 }
1045
1046 /*
1047 * Extent size must be a multiple of the appropriate block
1048 * size, if set at all. It must also be smaller than the
1049 * maximum extent size supported by the filesystem.
1050 *
1051 * Also, for non-realtime files, limit the extent size hint to
1052 * half the size of the AGs in the filesystem so alignment
1053 * doesn't result in extents larger than an AG.
1054 */
1055 if (fa->fsx_extsize != 0) {
1056 xfs_extlen_t size;
1057 xfs_fsblock_t extsize_fsb;
1058
1059 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1060 if (extsize_fsb > MAXEXTLEN) {
1061 code = XFS_ERROR(EINVAL);
1062 goto error_return;
1063 }
1064
1065 if (XFS_IS_REALTIME_INODE(ip) ||
1066 ((mask & FSX_XFLAGS) &&
1067 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1068 size = mp->m_sb.sb_rextsize <<
1069 mp->m_sb.sb_blocklog;
1070 } else {
1071 size = mp->m_sb.sb_blocksize;
1072 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1073 code = XFS_ERROR(EINVAL);
1074 goto error_return;
1075 }
1076 }
1077
1078 if (fa->fsx_extsize % size) {
1079 code = XFS_ERROR(EINVAL);
1080 goto error_return;
1081 }
1082 }
1083 }
1084
1085
1086 if (mask & FSX_XFLAGS) {
1087 /*
1088 * Can't change realtime flag if any extents are allocated.
1089 */
1090 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1091 (XFS_IS_REALTIME_INODE(ip)) !=
1092 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1093 code = XFS_ERROR(EINVAL); /* EFBIG? */
1094 goto error_return;
1095 }
1096
1097 /*
1098 * If realtime flag is set then must have realtime data.
1099 */
1100 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1101 if ((mp->m_sb.sb_rblocks == 0) ||
1102 (mp->m_sb.sb_rextsize == 0) ||
1103 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1104 code = XFS_ERROR(EINVAL);
1105 goto error_return;
1106 }
1107 }
1108
1109 /*
1110 * Can't modify an immutable/append-only file unless
1111 * we have appropriate permission.
1112 */
1113 if ((ip->i_d.di_flags &
1114 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1115 (fa->fsx_xflags &
1116 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1117 !capable(CAP_LINUX_IMMUTABLE)) {
1118 code = XFS_ERROR(EPERM);
1119 goto error_return;
1120 }
1121 }
1122
1123 xfs_trans_ijoin(tp, ip, 0);
1124
1125 /*
1126 * Change file ownership. Must be the owner or privileged.
1127 */
1128 if (mask & FSX_PROJID) {
1129 /*
1130 * CAP_FSETID overrides the following restrictions:
1131 *
1132 * The set-user-ID and set-group-ID bits of a file will be
1133 * cleared upon successful return from chown()
1134 */
1135 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1136 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1137 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1138
1139 /*
1140 * Change the ownerships and register quota modifications
1141 * in the transaction.
1142 */
1143 if (xfs_get_projid(ip) != fa->fsx_projid) {
1144 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1145 olddquot = xfs_qm_vop_chown(tp, ip,
1146 &ip->i_pdquot, pdqp);
1147 }
1148 xfs_set_projid(ip, fa->fsx_projid);
1149
1150 /*
1151 * We may have to rev the inode as well as
1152 * the superblock version number since projids didn't
1153 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1154 */
1155 if (ip->i_d.di_version == 1)
1156 xfs_bump_ino_vers2(tp, ip);
1157 }
1158
1159 }
1160
1161 if (mask & FSX_EXTSIZE)
1162 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1163 if (mask & FSX_XFLAGS) {
1164 xfs_set_diflags(ip, fa->fsx_xflags);
1165 xfs_diflags_to_linux(ip);
1166 }
1167
1168 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1169 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1170
1171 XFS_STATS_INC(xs_ig_attrchg);
1172
1173 /*
1174 * If this is a synchronous mount, make sure that the
1175 * transaction goes to disk before returning to the user.
1176 * This is slightly sub-optimal in that truncates require
1177 * two sync transactions instead of one for wsync filesystems.
1178 * One for the truncate and one for the timestamps since we
1179 * don't want to change the timestamps unless we're sure the
1180 * truncate worked. Truncates are less than 1% of the laddis
1181 * mix so this probably isn't worth the trouble to optimize.
1182 */
1183 if (mp->m_flags & XFS_MOUNT_WSYNC)
1184 xfs_trans_set_sync(tp);
1185 code = xfs_trans_commit(tp, 0);
1186 xfs_iunlock(ip, lock_flags);
1187
1188 /*
1189 * Release any dquot(s) the inode had kept before chown.
1190 */
1191 xfs_qm_dqrele(olddquot);
1192 xfs_qm_dqrele(udqp);
1193 xfs_qm_dqrele(pdqp);
1194
1195 return code;
1196
1197 error_return:
1198 xfs_qm_dqrele(udqp);
1199 xfs_qm_dqrele(pdqp);
1200 xfs_trans_cancel(tp, 0);
1201 if (lock_flags)
1202 xfs_iunlock(ip, lock_flags);
1203 return code;
1204 }
1205
1206 STATIC int
1207 xfs_ioc_fssetxattr(
1208 xfs_inode_t *ip,
1209 struct file *filp,
1210 void __user *arg)
1211 {
1212 struct fsxattr fa;
1213 unsigned int mask;
1214 int error;
1215
1216 if (copy_from_user(&fa, arg, sizeof(fa)))
1217 return -EFAULT;
1218
1219 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1220 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1221 mask |= FSX_NONBLOCK;
1222
1223 error = mnt_want_write_file(filp);
1224 if (error)
1225 return error;
1226 error = xfs_ioctl_setattr(ip, &fa, mask);
1227 mnt_drop_write_file(filp);
1228 return -error;
1229 }
1230
1231 STATIC int
1232 xfs_ioc_getxflags(
1233 xfs_inode_t *ip,
1234 void __user *arg)
1235 {
1236 unsigned int flags;
1237
1238 flags = xfs_di2lxflags(ip->i_d.di_flags);
1239 if (copy_to_user(arg, &flags, sizeof(flags)))
1240 return -EFAULT;
1241 return 0;
1242 }
1243
1244 STATIC int
1245 xfs_ioc_setxflags(
1246 xfs_inode_t *ip,
1247 struct file *filp,
1248 void __user *arg)
1249 {
1250 struct fsxattr fa;
1251 unsigned int flags;
1252 unsigned int mask;
1253 int error;
1254
1255 if (copy_from_user(&flags, arg, sizeof(flags)))
1256 return -EFAULT;
1257
1258 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1259 FS_NOATIME_FL | FS_NODUMP_FL | \
1260 FS_SYNC_FL))
1261 return -EOPNOTSUPP;
1262
1263 mask = FSX_XFLAGS;
1264 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1265 mask |= FSX_NONBLOCK;
1266 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1267
1268 error = mnt_want_write_file(filp);
1269 if (error)
1270 return error;
1271 error = xfs_ioctl_setattr(ip, &fa, mask);
1272 mnt_drop_write_file(filp);
1273 return -error;
1274 }
1275
1276 STATIC int
1277 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1278 {
1279 struct getbmap __user *base = *ap;
1280
1281 /* copy only getbmap portion (not getbmapx) */
1282 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1283 return XFS_ERROR(EFAULT);
1284
1285 *ap += sizeof(struct getbmap);
1286 return 0;
1287 }
1288
1289 STATIC int
1290 xfs_ioc_getbmap(
1291 struct xfs_inode *ip,
1292 int ioflags,
1293 unsigned int cmd,
1294 void __user *arg)
1295 {
1296 struct getbmapx bmx;
1297 int error;
1298
1299 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1300 return -XFS_ERROR(EFAULT);
1301
1302 if (bmx.bmv_count < 2)
1303 return -XFS_ERROR(EINVAL);
1304
1305 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1306 if (ioflags & IO_INVIS)
1307 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1308
1309 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1310 (struct getbmap *)arg+1);
1311 if (error)
1312 return -error;
1313
1314 /* copy back header - only size of getbmap */
1315 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1316 return -XFS_ERROR(EFAULT);
1317 return 0;
1318 }
1319
1320 STATIC int
1321 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1322 {
1323 struct getbmapx __user *base = *ap;
1324
1325 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1326 return XFS_ERROR(EFAULT);
1327
1328 *ap += sizeof(struct getbmapx);
1329 return 0;
1330 }
1331
1332 STATIC int
1333 xfs_ioc_getbmapx(
1334 struct xfs_inode *ip,
1335 void __user *arg)
1336 {
1337 struct getbmapx bmx;
1338 int error;
1339
1340 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1341 return -XFS_ERROR(EFAULT);
1342
1343 if (bmx.bmv_count < 2)
1344 return -XFS_ERROR(EINVAL);
1345
1346 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1347 return -XFS_ERROR(EINVAL);
1348
1349 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1350 (struct getbmapx *)arg+1);
1351 if (error)
1352 return -error;
1353
1354 /* copy back header */
1355 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1356 return -XFS_ERROR(EFAULT);
1357
1358 return 0;
1359 }
1360
1361 int
1362 xfs_ioc_swapext(
1363 xfs_swapext_t *sxp)
1364 {
1365 xfs_inode_t *ip, *tip;
1366 struct fd f, tmp;
1367 int error = 0;
1368
1369 /* Pull information for the target fd */
1370 f = fdget((int)sxp->sx_fdtarget);
1371 if (!f.file) {
1372 error = XFS_ERROR(EINVAL);
1373 goto out;
1374 }
1375
1376 if (!(f.file->f_mode & FMODE_WRITE) ||
1377 !(f.file->f_mode & FMODE_READ) ||
1378 (f.file->f_flags & O_APPEND)) {
1379 error = XFS_ERROR(EBADF);
1380 goto out_put_file;
1381 }
1382
1383 tmp = fdget((int)sxp->sx_fdtmp);
1384 if (!tmp.file) {
1385 error = XFS_ERROR(EINVAL);
1386 goto out_put_file;
1387 }
1388
1389 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1390 !(tmp.file->f_mode & FMODE_READ) ||
1391 (tmp.file->f_flags & O_APPEND)) {
1392 error = XFS_ERROR(EBADF);
1393 goto out_put_tmp_file;
1394 }
1395
1396 if (IS_SWAPFILE(file_inode(f.file)) ||
1397 IS_SWAPFILE(file_inode(tmp.file))) {
1398 error = XFS_ERROR(EINVAL);
1399 goto out_put_tmp_file;
1400 }
1401
1402 ip = XFS_I(file_inode(f.file));
1403 tip = XFS_I(file_inode(tmp.file));
1404
1405 if (ip->i_mount != tip->i_mount) {
1406 error = XFS_ERROR(EINVAL);
1407 goto out_put_tmp_file;
1408 }
1409
1410 if (ip->i_ino == tip->i_ino) {
1411 error = XFS_ERROR(EINVAL);
1412 goto out_put_tmp_file;
1413 }
1414
1415 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1416 error = XFS_ERROR(EIO);
1417 goto out_put_tmp_file;
1418 }
1419
1420 error = xfs_swap_extents(ip, tip, sxp);
1421
1422 out_put_tmp_file:
1423 fdput(tmp);
1424 out_put_file:
1425 fdput(f);
1426 out:
1427 return error;
1428 }
1429
1430 /*
1431 * Note: some of the ioctl's return positive numbers as a
1432 * byte count indicating success, such as readlink_by_handle.
1433 * So we don't "sign flip" like most other routines. This means
1434 * true errors need to be returned as a negative value.
1435 */
1436 long
1437 xfs_file_ioctl(
1438 struct file *filp,
1439 unsigned int cmd,
1440 unsigned long p)
1441 {
1442 struct inode *inode = file_inode(filp);
1443 struct xfs_inode *ip = XFS_I(inode);
1444 struct xfs_mount *mp = ip->i_mount;
1445 void __user *arg = (void __user *)p;
1446 int ioflags = 0;
1447 int error;
1448
1449 if (filp->f_mode & FMODE_NOCMTIME)
1450 ioflags |= IO_INVIS;
1451
1452 trace_xfs_file_ioctl(ip);
1453
1454 switch (cmd) {
1455 case FITRIM:
1456 return xfs_ioc_trim(mp, arg);
1457 case XFS_IOC_ALLOCSP:
1458 case XFS_IOC_FREESP:
1459 case XFS_IOC_RESVSP:
1460 case XFS_IOC_UNRESVSP:
1461 case XFS_IOC_ALLOCSP64:
1462 case XFS_IOC_FREESP64:
1463 case XFS_IOC_RESVSP64:
1464 case XFS_IOC_UNRESVSP64:
1465 case XFS_IOC_ZERO_RANGE: {
1466 xfs_flock64_t bf;
1467
1468 if (copy_from_user(&bf, arg, sizeof(bf)))
1469 return -XFS_ERROR(EFAULT);
1470 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1471 }
1472 case XFS_IOC_DIOINFO: {
1473 struct dioattr da;
1474 xfs_buftarg_t *target =
1475 XFS_IS_REALTIME_INODE(ip) ?
1476 mp->m_rtdev_targp : mp->m_ddev_targp;
1477
1478 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1479 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1480
1481 if (copy_to_user(arg, &da, sizeof(da)))
1482 return -XFS_ERROR(EFAULT);
1483 return 0;
1484 }
1485
1486 case XFS_IOC_FSBULKSTAT_SINGLE:
1487 case XFS_IOC_FSBULKSTAT:
1488 case XFS_IOC_FSINUMBERS:
1489 return xfs_ioc_bulkstat(mp, cmd, arg);
1490
1491 case XFS_IOC_FSGEOMETRY_V1:
1492 return xfs_ioc_fsgeometry_v1(mp, arg);
1493
1494 case XFS_IOC_FSGEOMETRY:
1495 return xfs_ioc_fsgeometry(mp, arg);
1496
1497 case XFS_IOC_GETVERSION:
1498 return put_user(inode->i_generation, (int __user *)arg);
1499
1500 case XFS_IOC_FSGETXATTR:
1501 return xfs_ioc_fsgetxattr(ip, 0, arg);
1502 case XFS_IOC_FSGETXATTRA:
1503 return xfs_ioc_fsgetxattr(ip, 1, arg);
1504 case XFS_IOC_FSSETXATTR:
1505 return xfs_ioc_fssetxattr(ip, filp, arg);
1506 case XFS_IOC_GETXFLAGS:
1507 return xfs_ioc_getxflags(ip, arg);
1508 case XFS_IOC_SETXFLAGS:
1509 return xfs_ioc_setxflags(ip, filp, arg);
1510
1511 case XFS_IOC_FSSETDM: {
1512 struct fsdmidata dmi;
1513
1514 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1515 return -XFS_ERROR(EFAULT);
1516
1517 error = mnt_want_write_file(filp);
1518 if (error)
1519 return error;
1520
1521 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1522 dmi.fsd_dmstate);
1523 mnt_drop_write_file(filp);
1524 return -error;
1525 }
1526
1527 case XFS_IOC_GETBMAP:
1528 case XFS_IOC_GETBMAPA:
1529 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1530
1531 case XFS_IOC_GETBMAPX:
1532 return xfs_ioc_getbmapx(ip, arg);
1533
1534 case XFS_IOC_FD_TO_HANDLE:
1535 case XFS_IOC_PATH_TO_HANDLE:
1536 case XFS_IOC_PATH_TO_FSHANDLE: {
1537 xfs_fsop_handlereq_t hreq;
1538
1539 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1540 return -XFS_ERROR(EFAULT);
1541 return xfs_find_handle(cmd, &hreq);
1542 }
1543 case XFS_IOC_OPEN_BY_HANDLE: {
1544 xfs_fsop_handlereq_t hreq;
1545
1546 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1547 return -XFS_ERROR(EFAULT);
1548 return xfs_open_by_handle(filp, &hreq);
1549 }
1550 case XFS_IOC_FSSETDM_BY_HANDLE:
1551 return xfs_fssetdm_by_handle(filp, arg);
1552
1553 case XFS_IOC_READLINK_BY_HANDLE: {
1554 xfs_fsop_handlereq_t hreq;
1555
1556 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1557 return -XFS_ERROR(EFAULT);
1558 return xfs_readlink_by_handle(filp, &hreq);
1559 }
1560 case XFS_IOC_ATTRLIST_BY_HANDLE:
1561 return xfs_attrlist_by_handle(filp, arg);
1562
1563 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1564 return xfs_attrmulti_by_handle(filp, arg);
1565
1566 case XFS_IOC_SWAPEXT: {
1567 struct xfs_swapext sxp;
1568
1569 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1570 return -XFS_ERROR(EFAULT);
1571 error = mnt_want_write_file(filp);
1572 if (error)
1573 return error;
1574 error = xfs_ioc_swapext(&sxp);
1575 mnt_drop_write_file(filp);
1576 return -error;
1577 }
1578
1579 case XFS_IOC_FSCOUNTS: {
1580 xfs_fsop_counts_t out;
1581
1582 error = xfs_fs_counts(mp, &out);
1583 if (error)
1584 return -error;
1585
1586 if (copy_to_user(arg, &out, sizeof(out)))
1587 return -XFS_ERROR(EFAULT);
1588 return 0;
1589 }
1590
1591 case XFS_IOC_SET_RESBLKS: {
1592 xfs_fsop_resblks_t inout;
1593 __uint64_t in;
1594
1595 if (!capable(CAP_SYS_ADMIN))
1596 return -EPERM;
1597
1598 if (mp->m_flags & XFS_MOUNT_RDONLY)
1599 return -XFS_ERROR(EROFS);
1600
1601 if (copy_from_user(&inout, arg, sizeof(inout)))
1602 return -XFS_ERROR(EFAULT);
1603
1604 error = mnt_want_write_file(filp);
1605 if (error)
1606 return error;
1607
1608 /* input parameter is passed in resblks field of structure */
1609 in = inout.resblks;
1610 error = xfs_reserve_blocks(mp, &in, &inout);
1611 mnt_drop_write_file(filp);
1612 if (error)
1613 return -error;
1614
1615 if (copy_to_user(arg, &inout, sizeof(inout)))
1616 return -XFS_ERROR(EFAULT);
1617 return 0;
1618 }
1619
1620 case XFS_IOC_GET_RESBLKS: {
1621 xfs_fsop_resblks_t out;
1622
1623 if (!capable(CAP_SYS_ADMIN))
1624 return -EPERM;
1625
1626 error = xfs_reserve_blocks(mp, NULL, &out);
1627 if (error)
1628 return -error;
1629
1630 if (copy_to_user(arg, &out, sizeof(out)))
1631 return -XFS_ERROR(EFAULT);
1632
1633 return 0;
1634 }
1635
1636 case XFS_IOC_FSGROWFSDATA: {
1637 xfs_growfs_data_t in;
1638
1639 if (copy_from_user(&in, arg, sizeof(in)))
1640 return -XFS_ERROR(EFAULT);
1641
1642 error = mnt_want_write_file(filp);
1643 if (error)
1644 return error;
1645 error = xfs_growfs_data(mp, &in);
1646 mnt_drop_write_file(filp);
1647 return -error;
1648 }
1649
1650 case XFS_IOC_FSGROWFSLOG: {
1651 xfs_growfs_log_t in;
1652
1653 if (copy_from_user(&in, arg, sizeof(in)))
1654 return -XFS_ERROR(EFAULT);
1655
1656 error = mnt_want_write_file(filp);
1657 if (error)
1658 return error;
1659 error = xfs_growfs_log(mp, &in);
1660 mnt_drop_write_file(filp);
1661 return -error;
1662 }
1663
1664 case XFS_IOC_FSGROWFSRT: {
1665 xfs_growfs_rt_t in;
1666
1667 if (copy_from_user(&in, arg, sizeof(in)))
1668 return -XFS_ERROR(EFAULT);
1669
1670 error = mnt_want_write_file(filp);
1671 if (error)
1672 return error;
1673 error = xfs_growfs_rt(mp, &in);
1674 mnt_drop_write_file(filp);
1675 return -error;
1676 }
1677
1678 case XFS_IOC_GOINGDOWN: {
1679 __uint32_t in;
1680
1681 if (!capable(CAP_SYS_ADMIN))
1682 return -EPERM;
1683
1684 if (get_user(in, (__uint32_t __user *)arg))
1685 return -XFS_ERROR(EFAULT);
1686
1687 error = xfs_fs_goingdown(mp, in);
1688 return -error;
1689 }
1690
1691 case XFS_IOC_ERROR_INJECTION: {
1692 xfs_error_injection_t in;
1693
1694 if (!capable(CAP_SYS_ADMIN))
1695 return -EPERM;
1696
1697 if (copy_from_user(&in, arg, sizeof(in)))
1698 return -XFS_ERROR(EFAULT);
1699
1700 error = xfs_errortag_add(in.errtag, mp);
1701 return -error;
1702 }
1703
1704 case XFS_IOC_ERROR_CLEARALL:
1705 if (!capable(CAP_SYS_ADMIN))
1706 return -EPERM;
1707
1708 error = xfs_errortag_clearall(mp, 1);
1709 return -error;
1710
1711 case XFS_IOC_FREE_EOFBLOCKS: {
1712 struct xfs_fs_eofblocks eofb;
1713 struct xfs_eofblocks keofb;
1714
1715 if (!capable(CAP_SYS_ADMIN))
1716 return -EPERM;
1717
1718 if (mp->m_flags & XFS_MOUNT_RDONLY)
1719 return -XFS_ERROR(EROFS);
1720
1721 if (!capable(CAP_SYS_ADMIN))
1722 return -EPERM;
1723
1724 if (mp->m_flags & XFS_MOUNT_RDONLY)
1725 return -XFS_ERROR(EROFS);
1726
1727 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1728 return -XFS_ERROR(EFAULT);
1729
1730 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1731 if (error)
1732 return -error;
1733
1734 return -xfs_icache_free_eofblocks(mp, &keofb);
1735 }
1736
1737 default:
1738 return -ENOTTY;
1739 }
1740 }
Linux with added FPC-III support