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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-bionic-kernel.git] / fs / xfs / xfs_ioctl.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_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 iattr iattr;
610 enum xfs_prealloc_flags flags = 0;
611 int error;
612
613 /*
614 * Only allow the sys admin to reserve space unless
615 * unwritten extents are enabled.
616 */
617 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
618 !capable(CAP_SYS_ADMIN))
619 return -EPERM;
620
621 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
622 return -EPERM;
623
624 if (!(filp->f_mode & FMODE_WRITE))
625 return -EBADF;
626
627 if (!S_ISREG(inode->i_mode))
628 return -EINVAL;
629
630 if (filp->f_flags & O_DSYNC)
631 flags |= XFS_PREALLOC_SYNC;
632 if (ioflags & XFS_IO_INVIS)
633 flags |= XFS_PREALLOC_INVISIBLE;
634
635 error = mnt_want_write_file(filp);
636 if (error)
637 return error;
638
639 xfs_ilock(ip, XFS_IOLOCK_EXCL);
640
641 switch (bf->l_whence) {
642 case 0: /*SEEK_SET*/
643 break;
644 case 1: /*SEEK_CUR*/
645 bf->l_start += filp->f_pos;
646 break;
647 case 2: /*SEEK_END*/
648 bf->l_start += XFS_ISIZE(ip);
649 break;
650 default:
651 error = -EINVAL;
652 goto out_unlock;
653 }
654
655 /*
656 * length of <= 0 for resv/unresv/zero is invalid. length for
657 * alloc/free is ignored completely and we have no idea what userspace
658 * might have set it to, so set it to zero to allow range
659 * checks to pass.
660 */
661 switch (cmd) {
662 case XFS_IOC_ZERO_RANGE:
663 case XFS_IOC_RESVSP:
664 case XFS_IOC_RESVSP64:
665 case XFS_IOC_UNRESVSP:
666 case XFS_IOC_UNRESVSP64:
667 if (bf->l_len <= 0) {
668 error = -EINVAL;
669 goto out_unlock;
670 }
671 break;
672 default:
673 bf->l_len = 0;
674 break;
675 }
676
677 if (bf->l_start < 0 ||
678 bf->l_start > inode->i_sb->s_maxbytes ||
679 bf->l_start + bf->l_len < 0 ||
680 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
681 error = -EINVAL;
682 goto out_unlock;
683 }
684
685 switch (cmd) {
686 case XFS_IOC_ZERO_RANGE:
687 flags |= XFS_PREALLOC_SET;
688 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
689 break;
690 case XFS_IOC_RESVSP:
691 case XFS_IOC_RESVSP64:
692 flags |= XFS_PREALLOC_SET;
693 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
694 XFS_BMAPI_PREALLOC);
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 flags |= XFS_PREALLOC_CLEAR;
705 if (bf->l_start > XFS_ISIZE(ip)) {
706 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
707 bf->l_start - XFS_ISIZE(ip), 0);
708 if (error)
709 goto out_unlock;
710 }
711
712 iattr.ia_valid = ATTR_SIZE;
713 iattr.ia_size = bf->l_start;
714
715 error = xfs_setattr_size(ip, &iattr);
716 break;
717 default:
718 ASSERT(0);
719 error = -EINVAL;
720 }
721
722 if (error)
723 goto out_unlock;
724
725 error = xfs_update_prealloc_flags(ip, flags);
726
727 out_unlock:
728 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
729 mnt_drop_write_file(filp);
730 return error;
731 }
732
733 STATIC int
734 xfs_ioc_bulkstat(
735 xfs_mount_t *mp,
736 unsigned int cmd,
737 void __user *arg)
738 {
739 xfs_fsop_bulkreq_t bulkreq;
740 int count; /* # of records returned */
741 xfs_ino_t inlast; /* last inode number */
742 int done;
743 int error;
744
745 /* done = 1 if there are more stats to get and if bulkstat */
746 /* should be called again (unused here, but used in dmapi) */
747
748 if (!capable(CAP_SYS_ADMIN))
749 return -EPERM;
750
751 if (XFS_FORCED_SHUTDOWN(mp))
752 return -EIO;
753
754 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
755 return -EFAULT;
756
757 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
758 return -EFAULT;
759
760 if ((count = bulkreq.icount) <= 0)
761 return -EINVAL;
762
763 if (bulkreq.ubuffer == NULL)
764 return -EINVAL;
765
766 if (cmd == XFS_IOC_FSINUMBERS)
767 error = xfs_inumbers(mp, &inlast, &count,
768 bulkreq.ubuffer, xfs_inumbers_fmt);
769 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
770 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
771 sizeof(xfs_bstat_t), NULL, &done);
772 else /* XFS_IOC_FSBULKSTAT */
773 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
774 sizeof(xfs_bstat_t), bulkreq.ubuffer,
775 &done);
776
777 if (error)
778 return error;
779
780 if (bulkreq.ocount != NULL) {
781 if (copy_to_user(bulkreq.lastip, &inlast,
782 sizeof(xfs_ino_t)))
783 return -EFAULT;
784
785 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
786 return -EFAULT;
787 }
788
789 return 0;
790 }
791
792 STATIC int
793 xfs_ioc_fsgeometry_v1(
794 xfs_mount_t *mp,
795 void __user *arg)
796 {
797 xfs_fsop_geom_t fsgeo;
798 int error;
799
800 error = xfs_fs_geometry(mp, &fsgeo, 3);
801 if (error)
802 return error;
803
804 /*
805 * Caller should have passed an argument of type
806 * xfs_fsop_geom_v1_t. This is a proper subset of the
807 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
808 */
809 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
810 return -EFAULT;
811 return 0;
812 }
813
814 STATIC int
815 xfs_ioc_fsgeometry(
816 xfs_mount_t *mp,
817 void __user *arg)
818 {
819 xfs_fsop_geom_t fsgeo;
820 int error;
821
822 error = xfs_fs_geometry(mp, &fsgeo, 4);
823 if (error)
824 return error;
825
826 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
827 return -EFAULT;
828 return 0;
829 }
830
831 /*
832 * Linux extended inode flags interface.
833 */
834
835 STATIC unsigned int
836 xfs_merge_ioc_xflags(
837 unsigned int flags,
838 unsigned int start)
839 {
840 unsigned int xflags = start;
841
842 if (flags & FS_IMMUTABLE_FL)
843 xflags |= XFS_XFLAG_IMMUTABLE;
844 else
845 xflags &= ~XFS_XFLAG_IMMUTABLE;
846 if (flags & FS_APPEND_FL)
847 xflags |= XFS_XFLAG_APPEND;
848 else
849 xflags &= ~XFS_XFLAG_APPEND;
850 if (flags & FS_SYNC_FL)
851 xflags |= XFS_XFLAG_SYNC;
852 else
853 xflags &= ~XFS_XFLAG_SYNC;
854 if (flags & FS_NOATIME_FL)
855 xflags |= XFS_XFLAG_NOATIME;
856 else
857 xflags &= ~XFS_XFLAG_NOATIME;
858 if (flags & FS_NODUMP_FL)
859 xflags |= XFS_XFLAG_NODUMP;
860 else
861 xflags &= ~XFS_XFLAG_NODUMP;
862
863 return xflags;
864 }
865
866 STATIC unsigned int
867 xfs_di2lxflags(
868 __uint16_t di_flags)
869 {
870 unsigned int flags = 0;
871
872 if (di_flags & XFS_DIFLAG_IMMUTABLE)
873 flags |= FS_IMMUTABLE_FL;
874 if (di_flags & XFS_DIFLAG_APPEND)
875 flags |= FS_APPEND_FL;
876 if (di_flags & XFS_DIFLAG_SYNC)
877 flags |= FS_SYNC_FL;
878 if (di_flags & XFS_DIFLAG_NOATIME)
879 flags |= FS_NOATIME_FL;
880 if (di_flags & XFS_DIFLAG_NODUMP)
881 flags |= FS_NODUMP_FL;
882 return flags;
883 }
884
885 STATIC int
886 xfs_ioc_fsgetxattr(
887 xfs_inode_t *ip,
888 int attr,
889 void __user *arg)
890 {
891 struct fsxattr fa;
892
893 memset(&fa, 0, sizeof(struct fsxattr));
894
895 xfs_ilock(ip, XFS_ILOCK_SHARED);
896 fa.fsx_xflags = xfs_ip2xflags(ip);
897 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
898 fa.fsx_projid = xfs_get_projid(ip);
899
900 if (attr) {
901 if (ip->i_afp) {
902 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
903 fa.fsx_nextents = ip->i_afp->if_bytes /
904 sizeof(xfs_bmbt_rec_t);
905 else
906 fa.fsx_nextents = ip->i_d.di_anextents;
907 } else
908 fa.fsx_nextents = 0;
909 } else {
910 if (ip->i_df.if_flags & XFS_IFEXTENTS)
911 fa.fsx_nextents = ip->i_df.if_bytes /
912 sizeof(xfs_bmbt_rec_t);
913 else
914 fa.fsx_nextents = ip->i_d.di_nextents;
915 }
916 xfs_iunlock(ip, XFS_ILOCK_SHARED);
917
918 if (copy_to_user(arg, &fa, sizeof(fa)))
919 return -EFAULT;
920 return 0;
921 }
922
923 STATIC void
924 xfs_set_diflags(
925 struct xfs_inode *ip,
926 unsigned int xflags)
927 {
928 unsigned int di_flags;
929
930 /* can't set PREALLOC this way, just preserve it */
931 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
932 if (xflags & XFS_XFLAG_IMMUTABLE)
933 di_flags |= XFS_DIFLAG_IMMUTABLE;
934 if (xflags & XFS_XFLAG_APPEND)
935 di_flags |= XFS_DIFLAG_APPEND;
936 if (xflags & XFS_XFLAG_SYNC)
937 di_flags |= XFS_DIFLAG_SYNC;
938 if (xflags & XFS_XFLAG_NOATIME)
939 di_flags |= XFS_DIFLAG_NOATIME;
940 if (xflags & XFS_XFLAG_NODUMP)
941 di_flags |= XFS_DIFLAG_NODUMP;
942 if (xflags & XFS_XFLAG_NODEFRAG)
943 di_flags |= XFS_DIFLAG_NODEFRAG;
944 if (xflags & XFS_XFLAG_FILESTREAM)
945 di_flags |= XFS_DIFLAG_FILESTREAM;
946 if (S_ISDIR(ip->i_d.di_mode)) {
947 if (xflags & XFS_XFLAG_RTINHERIT)
948 di_flags |= XFS_DIFLAG_RTINHERIT;
949 if (xflags & XFS_XFLAG_NOSYMLINKS)
950 di_flags |= XFS_DIFLAG_NOSYMLINKS;
951 if (xflags & XFS_XFLAG_EXTSZINHERIT)
952 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
953 if (xflags & XFS_XFLAG_PROJINHERIT)
954 di_flags |= XFS_DIFLAG_PROJINHERIT;
955 } else if (S_ISREG(ip->i_d.di_mode)) {
956 if (xflags & XFS_XFLAG_REALTIME)
957 di_flags |= XFS_DIFLAG_REALTIME;
958 if (xflags & XFS_XFLAG_EXTSIZE)
959 di_flags |= XFS_DIFLAG_EXTSIZE;
960 }
961
962 ip->i_d.di_flags = di_flags;
963 }
964
965 STATIC void
966 xfs_diflags_to_linux(
967 struct xfs_inode *ip)
968 {
969 struct inode *inode = VFS_I(ip);
970 unsigned int xflags = xfs_ip2xflags(ip);
971
972 if (xflags & XFS_XFLAG_IMMUTABLE)
973 inode->i_flags |= S_IMMUTABLE;
974 else
975 inode->i_flags &= ~S_IMMUTABLE;
976 if (xflags & XFS_XFLAG_APPEND)
977 inode->i_flags |= S_APPEND;
978 else
979 inode->i_flags &= ~S_APPEND;
980 if (xflags & XFS_XFLAG_SYNC)
981 inode->i_flags |= S_SYNC;
982 else
983 inode->i_flags &= ~S_SYNC;
984 if (xflags & XFS_XFLAG_NOATIME)
985 inode->i_flags |= S_NOATIME;
986 else
987 inode->i_flags &= ~S_NOATIME;
988 }
989
990 static int
991 xfs_ioctl_setattr_xflags(
992 struct xfs_trans *tp,
993 struct xfs_inode *ip,
994 struct fsxattr *fa)
995 {
996 struct xfs_mount *mp = ip->i_mount;
997
998 /* Can't change realtime flag if any extents are allocated. */
999 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1000 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME))
1001 return -EINVAL;
1002
1003 /* If realtime flag is set then must have realtime device */
1004 if (fa->fsx_xflags & XFS_XFLAG_REALTIME) {
1005 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1006 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1007 return -EINVAL;
1008 }
1009
1010 /*
1011 * Can't modify an immutable/append-only file unless
1012 * we have appropriate permission.
1013 */
1014 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1015 (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1016 !capable(CAP_LINUX_IMMUTABLE))
1017 return -EPERM;
1018
1019 xfs_set_diflags(ip, fa->fsx_xflags);
1020 xfs_diflags_to_linux(ip);
1021 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1022 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1023 XFS_STATS_INC(xs_ig_attrchg);
1024 return 0;
1025 }
1026
1027 /*
1028 * Set up the transaction structure for the setattr operation, checking that we
1029 * have permission to do so. On success, return a clean transaction and the
1030 * inode locked exclusively ready for further operation specific checks. On
1031 * failure, return an error without modifying or locking the inode.
1032 */
1033 static struct xfs_trans *
1034 xfs_ioctl_setattr_get_trans(
1035 struct xfs_inode *ip)
1036 {
1037 struct xfs_mount *mp = ip->i_mount;
1038 struct xfs_trans *tp;
1039 int error;
1040
1041 if (mp->m_flags & XFS_MOUNT_RDONLY)
1042 return ERR_PTR(-EROFS);
1043 if (XFS_FORCED_SHUTDOWN(mp))
1044 return ERR_PTR(-EIO);
1045
1046 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1047 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1048 if (error)
1049 goto out_cancel;
1050
1051 xfs_ilock(ip, XFS_ILOCK_EXCL);
1052 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1053
1054 /*
1055 * CAP_FOWNER overrides the following restrictions:
1056 *
1057 * The user ID of the calling process must be equal to the file owner
1058 * ID, except in cases where the CAP_FSETID capability is applicable.
1059 */
1060 if (!inode_owner_or_capable(VFS_I(ip))) {
1061 error = -EPERM;
1062 goto out_cancel;
1063 }
1064
1065 if (mp->m_flags & XFS_MOUNT_WSYNC)
1066 xfs_trans_set_sync(tp);
1067
1068 return tp;
1069
1070 out_cancel:
1071 xfs_trans_cancel(tp, 0);
1072 return ERR_PTR(error);
1073 }
1074
1075 /*
1076 * extent size hint validation is somewhat cumbersome. Rules are:
1077 *
1078 * 1. extent size hint is only valid for directories and regular files
1079 * 2. XFS_XFLAG_EXTSIZE is only valid for regular files
1080 * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories.
1081 * 4. can only be changed on regular files if no extents are allocated
1082 * 5. can be changed on directories at any time
1083 * 6. extsize hint of 0 turns off hints, clears inode flags.
1084 * 7. Extent size must be a multiple of the appropriate block size.
1085 * 8. for non-realtime files, the extent size hint must be limited
1086 * to half the AG size to avoid alignment extending the extent beyond the
1087 * limits of the AG.
1088 */
1089 static int
1090 xfs_ioctl_setattr_check_extsize(
1091 struct xfs_inode *ip,
1092 struct fsxattr *fa)
1093 {
1094 struct xfs_mount *mp = ip->i_mount;
1095
1096 if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
1097 return -EINVAL;
1098
1099 if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) &&
1100 !S_ISDIR(ip->i_d.di_mode))
1101 return -EINVAL;
1102
1103 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents &&
1104 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1105 return -EINVAL;
1106
1107 if (fa->fsx_extsize != 0) {
1108 xfs_extlen_t size;
1109 xfs_fsblock_t extsize_fsb;
1110
1111 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1112 if (extsize_fsb > MAXEXTLEN)
1113 return -EINVAL;
1114
1115 if (XFS_IS_REALTIME_INODE(ip) ||
1116 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1117 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1118 } else {
1119 size = mp->m_sb.sb_blocksize;
1120 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1121 return -EINVAL;
1122 }
1123
1124 if (fa->fsx_extsize % size)
1125 return -EINVAL;
1126 } else
1127 fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT);
1128
1129 return 0;
1130 }
1131
1132 static int
1133 xfs_ioctl_setattr_check_projid(
1134 struct xfs_inode *ip,
1135 struct fsxattr *fa)
1136 {
1137 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1138 if (fa->fsx_projid > (__uint16_t)-1 &&
1139 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1140 return -EINVAL;
1141
1142 /*
1143 * Project Quota ID state is only allowed to change from within the init
1144 * namespace. Enforce that restriction only if we are trying to change
1145 * the quota ID state. Everything else is allowed in user namespaces.
1146 */
1147 if (current_user_ns() == &init_user_ns)
1148 return 0;
1149
1150 if (xfs_get_projid(ip) != fa->fsx_projid)
1151 return -EINVAL;
1152 if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) !=
1153 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1154 return -EINVAL;
1155
1156 return 0;
1157 }
1158
1159 STATIC int
1160 xfs_ioctl_setattr(
1161 xfs_inode_t *ip,
1162 struct fsxattr *fa)
1163 {
1164 struct xfs_mount *mp = ip->i_mount;
1165 struct xfs_trans *tp;
1166 struct xfs_dquot *udqp = NULL;
1167 struct xfs_dquot *pdqp = NULL;
1168 struct xfs_dquot *olddquot = NULL;
1169 int code;
1170
1171 trace_xfs_ioctl_setattr(ip);
1172
1173 code = xfs_ioctl_setattr_check_projid(ip, fa);
1174 if (code)
1175 return code;
1176
1177 /*
1178 * If disk quotas is on, we make sure that the dquots do exist on disk,
1179 * before we start any other transactions. Trying to do this later
1180 * is messy. We don't care to take a readlock to look at the ids
1181 * in inode here, because we can't hold it across the trans_reserve.
1182 * If the IDs do change before we take the ilock, we're covered
1183 * because the i_*dquot fields will get updated anyway.
1184 */
1185 if (XFS_IS_QUOTA_ON(mp)) {
1186 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1187 ip->i_d.di_gid, fa->fsx_projid,
1188 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1189 if (code)
1190 return code;
1191 }
1192
1193 tp = xfs_ioctl_setattr_get_trans(ip);
1194 if (IS_ERR(tp)) {
1195 code = PTR_ERR(tp);
1196 goto error_free_dquots;
1197 }
1198
1199
1200 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1201 xfs_get_projid(ip) != fa->fsx_projid) {
1202 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1203 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1204 if (code) /* out of quota */
1205 goto error_trans_cancel;
1206 }
1207
1208 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1209 if (code)
1210 goto error_trans_cancel;
1211
1212 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1213 if (code)
1214 goto error_trans_cancel;
1215
1216 /*
1217 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1218 * overrides the following restrictions:
1219 *
1220 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1221 * successful return from chown()
1222 */
1223
1224 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1225 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1226 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1227
1228 /* Change the ownerships and register project quota modifications */
1229 if (xfs_get_projid(ip) != fa->fsx_projid) {
1230 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1231 olddquot = xfs_qm_vop_chown(tp, ip,
1232 &ip->i_pdquot, pdqp);
1233 }
1234 ASSERT(ip->i_d.di_version > 1);
1235 xfs_set_projid(ip, fa->fsx_projid);
1236 }
1237
1238 /*
1239 * Only set the extent size hint if we've already determined that the
1240 * extent size hint should be set on the inode. If no extent size flags
1241 * are set on the inode then unconditionally clear the extent size hint.
1242 */
1243 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1244 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1245 else
1246 ip->i_d.di_extsize = 0;
1247
1248 code = xfs_trans_commit(tp, 0);
1249
1250 /*
1251 * Release any dquot(s) the inode had kept before chown.
1252 */
1253 xfs_qm_dqrele(olddquot);
1254 xfs_qm_dqrele(udqp);
1255 xfs_qm_dqrele(pdqp);
1256
1257 return code;
1258
1259 error_trans_cancel:
1260 xfs_trans_cancel(tp, 0);
1261 error_free_dquots:
1262 xfs_qm_dqrele(udqp);
1263 xfs_qm_dqrele(pdqp);
1264 return code;
1265 }
1266
1267 STATIC int
1268 xfs_ioc_fssetxattr(
1269 xfs_inode_t *ip,
1270 struct file *filp,
1271 void __user *arg)
1272 {
1273 struct fsxattr fa;
1274 int error;
1275
1276 if (copy_from_user(&fa, arg, sizeof(fa)))
1277 return -EFAULT;
1278
1279 error = mnt_want_write_file(filp);
1280 if (error)
1281 return error;
1282 error = xfs_ioctl_setattr(ip, &fa);
1283 mnt_drop_write_file(filp);
1284 return error;
1285 }
1286
1287 STATIC int
1288 xfs_ioc_getxflags(
1289 xfs_inode_t *ip,
1290 void __user *arg)
1291 {
1292 unsigned int flags;
1293
1294 flags = xfs_di2lxflags(ip->i_d.di_flags);
1295 if (copy_to_user(arg, &flags, sizeof(flags)))
1296 return -EFAULT;
1297 return 0;
1298 }
1299
1300 STATIC int
1301 xfs_ioc_setxflags(
1302 struct xfs_inode *ip,
1303 struct file *filp,
1304 void __user *arg)
1305 {
1306 struct xfs_trans *tp;
1307 struct fsxattr fa;
1308 unsigned int flags;
1309 int error;
1310
1311 if (copy_from_user(&flags, arg, sizeof(flags)))
1312 return -EFAULT;
1313
1314 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1315 FS_NOATIME_FL | FS_NODUMP_FL | \
1316 FS_SYNC_FL))
1317 return -EOPNOTSUPP;
1318
1319 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1320
1321 error = mnt_want_write_file(filp);
1322 if (error)
1323 return error;
1324
1325 tp = xfs_ioctl_setattr_get_trans(ip);
1326 if (IS_ERR(tp)) {
1327 error = PTR_ERR(tp);
1328 goto out_drop_write;
1329 }
1330
1331 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1332 if (error) {
1333 xfs_trans_cancel(tp, 0);
1334 goto out_drop_write;
1335 }
1336
1337 error = xfs_trans_commit(tp, 0);
1338 out_drop_write:
1339 mnt_drop_write_file(filp);
1340 return error;
1341 }
1342
1343 STATIC int
1344 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1345 {
1346 struct getbmap __user *base = (struct getbmap __user *)*ap;
1347
1348 /* copy only getbmap portion (not getbmapx) */
1349 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1350 return -EFAULT;
1351
1352 *ap += sizeof(struct getbmap);
1353 return 0;
1354 }
1355
1356 STATIC int
1357 xfs_ioc_getbmap(
1358 struct xfs_inode *ip,
1359 int ioflags,
1360 unsigned int cmd,
1361 void __user *arg)
1362 {
1363 struct getbmapx bmx;
1364 int error;
1365
1366 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1367 return -EFAULT;
1368
1369 if (bmx.bmv_count < 2)
1370 return -EINVAL;
1371
1372 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1373 if (ioflags & XFS_IO_INVIS)
1374 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1375
1376 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1377 (__force struct getbmap *)arg+1);
1378 if (error)
1379 return error;
1380
1381 /* copy back header - only size of getbmap */
1382 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1383 return -EFAULT;
1384 return 0;
1385 }
1386
1387 STATIC int
1388 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1389 {
1390 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1391
1392 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1393 return -EFAULT;
1394
1395 *ap += sizeof(struct getbmapx);
1396 return 0;
1397 }
1398
1399 STATIC int
1400 xfs_ioc_getbmapx(
1401 struct xfs_inode *ip,
1402 void __user *arg)
1403 {
1404 struct getbmapx bmx;
1405 int error;
1406
1407 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1408 return -EFAULT;
1409
1410 if (bmx.bmv_count < 2)
1411 return -EINVAL;
1412
1413 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1414 return -EINVAL;
1415
1416 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1417 (__force struct getbmapx *)arg+1);
1418 if (error)
1419 return error;
1420
1421 /* copy back header */
1422 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1423 return -EFAULT;
1424
1425 return 0;
1426 }
1427
1428 int
1429 xfs_ioc_swapext(
1430 xfs_swapext_t *sxp)
1431 {
1432 xfs_inode_t *ip, *tip;
1433 struct fd f, tmp;
1434 int error = 0;
1435
1436 /* Pull information for the target fd */
1437 f = fdget((int)sxp->sx_fdtarget);
1438 if (!f.file) {
1439 error = -EINVAL;
1440 goto out;
1441 }
1442
1443 if (!(f.file->f_mode & FMODE_WRITE) ||
1444 !(f.file->f_mode & FMODE_READ) ||
1445 (f.file->f_flags & O_APPEND)) {
1446 error = -EBADF;
1447 goto out_put_file;
1448 }
1449
1450 tmp = fdget((int)sxp->sx_fdtmp);
1451 if (!tmp.file) {
1452 error = -EINVAL;
1453 goto out_put_file;
1454 }
1455
1456 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1457 !(tmp.file->f_mode & FMODE_READ) ||
1458 (tmp.file->f_flags & O_APPEND)) {
1459 error = -EBADF;
1460 goto out_put_tmp_file;
1461 }
1462
1463 if (IS_SWAPFILE(file_inode(f.file)) ||
1464 IS_SWAPFILE(file_inode(tmp.file))) {
1465 error = -EINVAL;
1466 goto out_put_tmp_file;
1467 }
1468
1469 ip = XFS_I(file_inode(f.file));
1470 tip = XFS_I(file_inode(tmp.file));
1471
1472 if (ip->i_mount != tip->i_mount) {
1473 error = -EINVAL;
1474 goto out_put_tmp_file;
1475 }
1476
1477 if (ip->i_ino == tip->i_ino) {
1478 error = -EINVAL;
1479 goto out_put_tmp_file;
1480 }
1481
1482 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1483 error = -EIO;
1484 goto out_put_tmp_file;
1485 }
1486
1487 error = xfs_swap_extents(ip, tip, sxp);
1488
1489 out_put_tmp_file:
1490 fdput(tmp);
1491 out_put_file:
1492 fdput(f);
1493 out:
1494 return error;
1495 }
1496
1497 /*
1498 * Note: some of the ioctl's return positive numbers as a
1499 * byte count indicating success, such as readlink_by_handle.
1500 * So we don't "sign flip" like most other routines. This means
1501 * true errors need to be returned as a negative value.
1502 */
1503 long
1504 xfs_file_ioctl(
1505 struct file *filp,
1506 unsigned int cmd,
1507 unsigned long p)
1508 {
1509 struct inode *inode = file_inode(filp);
1510 struct xfs_inode *ip = XFS_I(inode);
1511 struct xfs_mount *mp = ip->i_mount;
1512 void __user *arg = (void __user *)p;
1513 int ioflags = 0;
1514 int error;
1515
1516 if (filp->f_mode & FMODE_NOCMTIME)
1517 ioflags |= XFS_IO_INVIS;
1518
1519 trace_xfs_file_ioctl(ip);
1520
1521 switch (cmd) {
1522 case FITRIM:
1523 return xfs_ioc_trim(mp, arg);
1524 case XFS_IOC_ALLOCSP:
1525 case XFS_IOC_FREESP:
1526 case XFS_IOC_RESVSP:
1527 case XFS_IOC_UNRESVSP:
1528 case XFS_IOC_ALLOCSP64:
1529 case XFS_IOC_FREESP64:
1530 case XFS_IOC_RESVSP64:
1531 case XFS_IOC_UNRESVSP64:
1532 case XFS_IOC_ZERO_RANGE: {
1533 xfs_flock64_t bf;
1534
1535 if (copy_from_user(&bf, arg, sizeof(bf)))
1536 return -EFAULT;
1537 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1538 }
1539 case XFS_IOC_DIOINFO: {
1540 struct dioattr da;
1541 xfs_buftarg_t *target =
1542 XFS_IS_REALTIME_INODE(ip) ?
1543 mp->m_rtdev_targp : mp->m_ddev_targp;
1544
1545 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1546 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1547
1548 if (copy_to_user(arg, &da, sizeof(da)))
1549 return -EFAULT;
1550 return 0;
1551 }
1552
1553 case XFS_IOC_FSBULKSTAT_SINGLE:
1554 case XFS_IOC_FSBULKSTAT:
1555 case XFS_IOC_FSINUMBERS:
1556 return xfs_ioc_bulkstat(mp, cmd, arg);
1557
1558 case XFS_IOC_FSGEOMETRY_V1:
1559 return xfs_ioc_fsgeometry_v1(mp, arg);
1560
1561 case XFS_IOC_FSGEOMETRY:
1562 return xfs_ioc_fsgeometry(mp, arg);
1563
1564 case XFS_IOC_GETVERSION:
1565 return put_user(inode->i_generation, (int __user *)arg);
1566
1567 case XFS_IOC_FSGETXATTR:
1568 return xfs_ioc_fsgetxattr(ip, 0, arg);
1569 case XFS_IOC_FSGETXATTRA:
1570 return xfs_ioc_fsgetxattr(ip, 1, arg);
1571 case XFS_IOC_FSSETXATTR:
1572 return xfs_ioc_fssetxattr(ip, filp, arg);
1573 case XFS_IOC_GETXFLAGS:
1574 return xfs_ioc_getxflags(ip, arg);
1575 case XFS_IOC_SETXFLAGS:
1576 return xfs_ioc_setxflags(ip, filp, arg);
1577
1578 case XFS_IOC_FSSETDM: {
1579 struct fsdmidata dmi;
1580
1581 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1582 return -EFAULT;
1583
1584 error = mnt_want_write_file(filp);
1585 if (error)
1586 return error;
1587
1588 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1589 dmi.fsd_dmstate);
1590 mnt_drop_write_file(filp);
1591 return error;
1592 }
1593
1594 case XFS_IOC_GETBMAP:
1595 case XFS_IOC_GETBMAPA:
1596 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1597
1598 case XFS_IOC_GETBMAPX:
1599 return xfs_ioc_getbmapx(ip, arg);
1600
1601 case XFS_IOC_FD_TO_HANDLE:
1602 case XFS_IOC_PATH_TO_HANDLE:
1603 case XFS_IOC_PATH_TO_FSHANDLE: {
1604 xfs_fsop_handlereq_t hreq;
1605
1606 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1607 return -EFAULT;
1608 return xfs_find_handle(cmd, &hreq);
1609 }
1610 case XFS_IOC_OPEN_BY_HANDLE: {
1611 xfs_fsop_handlereq_t hreq;
1612
1613 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1614 return -EFAULT;
1615 return xfs_open_by_handle(filp, &hreq);
1616 }
1617 case XFS_IOC_FSSETDM_BY_HANDLE:
1618 return xfs_fssetdm_by_handle(filp, arg);
1619
1620 case XFS_IOC_READLINK_BY_HANDLE: {
1621 xfs_fsop_handlereq_t hreq;
1622
1623 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1624 return -EFAULT;
1625 return xfs_readlink_by_handle(filp, &hreq);
1626 }
1627 case XFS_IOC_ATTRLIST_BY_HANDLE:
1628 return xfs_attrlist_by_handle(filp, arg);
1629
1630 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1631 return xfs_attrmulti_by_handle(filp, arg);
1632
1633 case XFS_IOC_SWAPEXT: {
1634 struct xfs_swapext sxp;
1635
1636 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1637 return -EFAULT;
1638 error = mnt_want_write_file(filp);
1639 if (error)
1640 return error;
1641 error = xfs_ioc_swapext(&sxp);
1642 mnt_drop_write_file(filp);
1643 return error;
1644 }
1645
1646 case XFS_IOC_FSCOUNTS: {
1647 xfs_fsop_counts_t out;
1648
1649 error = xfs_fs_counts(mp, &out);
1650 if (error)
1651 return error;
1652
1653 if (copy_to_user(arg, &out, sizeof(out)))
1654 return -EFAULT;
1655 return 0;
1656 }
1657
1658 case XFS_IOC_SET_RESBLKS: {
1659 xfs_fsop_resblks_t inout;
1660 __uint64_t in;
1661
1662 if (!capable(CAP_SYS_ADMIN))
1663 return -EPERM;
1664
1665 if (mp->m_flags & XFS_MOUNT_RDONLY)
1666 return -EROFS;
1667
1668 if (copy_from_user(&inout, arg, sizeof(inout)))
1669 return -EFAULT;
1670
1671 error = mnt_want_write_file(filp);
1672 if (error)
1673 return error;
1674
1675 /* input parameter is passed in resblks field of structure */
1676 in = inout.resblks;
1677 error = xfs_reserve_blocks(mp, &in, &inout);
1678 mnt_drop_write_file(filp);
1679 if (error)
1680 return error;
1681
1682 if (copy_to_user(arg, &inout, sizeof(inout)))
1683 return -EFAULT;
1684 return 0;
1685 }
1686
1687 case XFS_IOC_GET_RESBLKS: {
1688 xfs_fsop_resblks_t out;
1689
1690 if (!capable(CAP_SYS_ADMIN))
1691 return -EPERM;
1692
1693 error = xfs_reserve_blocks(mp, NULL, &out);
1694 if (error)
1695 return error;
1696
1697 if (copy_to_user(arg, &out, sizeof(out)))
1698 return -EFAULT;
1699
1700 return 0;
1701 }
1702
1703 case XFS_IOC_FSGROWFSDATA: {
1704 xfs_growfs_data_t in;
1705
1706 if (copy_from_user(&in, arg, sizeof(in)))
1707 return -EFAULT;
1708
1709 error = mnt_want_write_file(filp);
1710 if (error)
1711 return error;
1712 error = xfs_growfs_data(mp, &in);
1713 mnt_drop_write_file(filp);
1714 return error;
1715 }
1716
1717 case XFS_IOC_FSGROWFSLOG: {
1718 xfs_growfs_log_t in;
1719
1720 if (copy_from_user(&in, arg, sizeof(in)))
1721 return -EFAULT;
1722
1723 error = mnt_want_write_file(filp);
1724 if (error)
1725 return error;
1726 error = xfs_growfs_log(mp, &in);
1727 mnt_drop_write_file(filp);
1728 return error;
1729 }
1730
1731 case XFS_IOC_FSGROWFSRT: {
1732 xfs_growfs_rt_t in;
1733
1734 if (copy_from_user(&in, arg, sizeof(in)))
1735 return -EFAULT;
1736
1737 error = mnt_want_write_file(filp);
1738 if (error)
1739 return error;
1740 error = xfs_growfs_rt(mp, &in);
1741 mnt_drop_write_file(filp);
1742 return error;
1743 }
1744
1745 case XFS_IOC_GOINGDOWN: {
1746 __uint32_t in;
1747
1748 if (!capable(CAP_SYS_ADMIN))
1749 return -EPERM;
1750
1751 if (get_user(in, (__uint32_t __user *)arg))
1752 return -EFAULT;
1753
1754 return xfs_fs_goingdown(mp, in);
1755 }
1756
1757 case XFS_IOC_ERROR_INJECTION: {
1758 xfs_error_injection_t in;
1759
1760 if (!capable(CAP_SYS_ADMIN))
1761 return -EPERM;
1762
1763 if (copy_from_user(&in, arg, sizeof(in)))
1764 return -EFAULT;
1765
1766 return xfs_errortag_add(in.errtag, mp);
1767 }
1768
1769 case XFS_IOC_ERROR_CLEARALL:
1770 if (!capable(CAP_SYS_ADMIN))
1771 return -EPERM;
1772
1773 return xfs_errortag_clearall(mp, 1);
1774
1775 case XFS_IOC_FREE_EOFBLOCKS: {
1776 struct xfs_fs_eofblocks eofb;
1777 struct xfs_eofblocks keofb;
1778
1779 if (!capable(CAP_SYS_ADMIN))
1780 return -EPERM;
1781
1782 if (mp->m_flags & XFS_MOUNT_RDONLY)
1783 return -EROFS;
1784
1785 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1786 return -EFAULT;
1787
1788 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1789 if (error)
1790 return error;
1791
1792 return xfs_icache_free_eofblocks(mp, &keofb);
1793 }
1794
1795 default:
1796 return -ENOTTY;
1797 }
1798 }
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