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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_shared.h"
22 #include "xfs_log.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_alloc.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_dinode.h"
30 #include "xfs_inode.h"
31 #include "xfs_ioctl.h"
32 #include "xfs_rtalloc.h"
33 #include "xfs_itable.h"
34 #include "xfs_error.h"
35 #include "xfs_attr.h"
36 #include "xfs_bmap.h"
37 #include "xfs_bmap_util.h"
38 #include "xfs_buf_item.h"
39 #include "xfs_fsops.h"
40 #include "xfs_discard.h"
41 #include "xfs_quota.h"
42 #include "xfs_inode_item.h"
43 #include "xfs_export.h"
44 #include "xfs_trace.h"
45 #include "xfs_icache.h"
46 #include "xfs_symlink.h"
47
48 #include <linux/capability.h>
49 #include <linux/dcache.h>
50 #include <linux/mount.h>
51 #include <linux/namei.h>
52 #include <linux/pagemap.h>
53 #include <linux/slab.h>
54 #include <linux/exportfs.h>
55
56 /*
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
59 *
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
66 */
67 int
68 xfs_find_handle(
69 unsigned int cmd,
70 xfs_fsop_handlereq_t *hreq)
71 {
72 int hsize;
73 xfs_handle_t handle;
74 struct inode *inode;
75 struct fd f = {NULL};
76 struct path path;
77 int error;
78 struct xfs_inode *ip;
79
80 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 f = fdget(hreq->fd);
82 if (!f.file)
83 return -EBADF;
84 inode = file_inode(f.file);
85 } else {
86 error = user_lpath((const char __user *)hreq->path, &path);
87 if (error)
88 return error;
89 inode = path.dentry->d_inode;
90 }
91 ip = XFS_I(inode);
92
93 /*
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
96 */
97 error = -EINVAL;
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 goto out_put;
100
101 error = -EBADF;
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
105 goto out_put;
106
107
108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109
110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 /*
112 * This handle only contains an fsid, zero the rest.
113 */
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
116 } else {
117 int lock_mode;
118
119 lock_mode = xfs_ilock_map_shared(ip);
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 xfs_iunlock_map_shared(ip, lock_mode);
126
127 hsize = XFS_HSIZE(handle);
128 }
129
130 error = -EFAULT;
131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
133 goto out_put;
134
135 error = 0;
136
137 out_put:
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 fdput(f);
140 else
141 path_put(&path);
142 return error;
143 }
144
145 /*
146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
148 */
149 STATIC int
150 xfs_handle_acceptable(
151 void *context,
152 struct dentry *dentry)
153 {
154 return 1;
155 }
156
157 /*
158 * Convert userspace handle data into a dentry.
159 */
160 struct dentry *
161 xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
164 u32 hlen)
165 {
166 xfs_handle_t handle;
167 struct xfs_fid64 fid;
168
169 /*
170 * Only allow handle opens under a directory.
171 */
172 if (!S_ISDIR(file_inode(parfilp)->i_mode))
173 return ERR_PTR(-ENOTDIR);
174
175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
182
183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
186
187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
190 }
191
192 STATIC struct dentry *
193 xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196 {
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
198 }
199
200 int
201 xfs_open_by_handle(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
204 {
205 const struct cred *cred = current_cred();
206 int error;
207 int fd;
208 int permflag;
209 struct file *filp;
210 struct inode *inode;
211 struct dentry *dentry;
212 fmode_t fmode;
213 struct path path;
214
215 if (!capable(CAP_SYS_ADMIN))
216 return -XFS_ERROR(EPERM);
217
218 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
219 if (IS_ERR(dentry))
220 return PTR_ERR(dentry);
221 inode = dentry->d_inode;
222
223 /* Restrict xfs_open_by_handle to directories & regular files. */
224 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
225 error = -XFS_ERROR(EPERM);
226 goto out_dput;
227 }
228
229 #if BITS_PER_LONG != 32
230 hreq->oflags |= O_LARGEFILE;
231 #endif
232
233 permflag = hreq->oflags;
234 fmode = OPEN_FMODE(permflag);
235 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
236 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
237 error = -XFS_ERROR(EPERM);
238 goto out_dput;
239 }
240
241 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
242 error = -XFS_ERROR(EACCES);
243 goto out_dput;
244 }
245
246 /* Can't write directories. */
247 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
248 error = -XFS_ERROR(EISDIR);
249 goto out_dput;
250 }
251
252 fd = get_unused_fd_flags(0);
253 if (fd < 0) {
254 error = fd;
255 goto out_dput;
256 }
257
258 path.mnt = parfilp->f_path.mnt;
259 path.dentry = dentry;
260 filp = dentry_open(&path, hreq->oflags, cred);
261 dput(dentry);
262 if (IS_ERR(filp)) {
263 put_unused_fd(fd);
264 return PTR_ERR(filp);
265 }
266
267 if (S_ISREG(inode->i_mode)) {
268 filp->f_flags |= O_NOATIME;
269 filp->f_mode |= FMODE_NOCMTIME;
270 }
271
272 fd_install(fd, filp);
273 return fd;
274
275 out_dput:
276 dput(dentry);
277 return error;
278 }
279
280 /*
281 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
282 * unused first argument.
283 */
284 STATIC int
285 do_readlink(
286 char __user *buffer,
287 int buflen,
288 const char *link)
289 {
290 int len;
291
292 len = PTR_ERR(link);
293 if (IS_ERR(link))
294 goto out;
295
296 len = strlen(link);
297 if (len > (unsigned) buflen)
298 len = buflen;
299 if (copy_to_user(buffer, link, len))
300 len = -EFAULT;
301 out:
302 return len;
303 }
304
305
306 int
307 xfs_readlink_by_handle(
308 struct file *parfilp,
309 xfs_fsop_handlereq_t *hreq)
310 {
311 struct dentry *dentry;
312 __u32 olen;
313 void *link;
314 int error;
315
316 if (!capable(CAP_SYS_ADMIN))
317 return -XFS_ERROR(EPERM);
318
319 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
320 if (IS_ERR(dentry))
321 return PTR_ERR(dentry);
322
323 /* Restrict this handle operation to symlinks only. */
324 if (!S_ISLNK(dentry->d_inode->i_mode)) {
325 error = -XFS_ERROR(EINVAL);
326 goto out_dput;
327 }
328
329 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
330 error = -XFS_ERROR(EFAULT);
331 goto out_dput;
332 }
333
334 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
335 if (!link) {
336 error = -XFS_ERROR(ENOMEM);
337 goto out_dput;
338 }
339
340 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
341 if (error)
342 goto out_kfree;
343 error = do_readlink(hreq->ohandle, olen, link);
344 if (error)
345 goto out_kfree;
346
347 out_kfree:
348 kfree(link);
349 out_dput:
350 dput(dentry);
351 return error;
352 }
353
354 int
355 xfs_set_dmattrs(
356 xfs_inode_t *ip,
357 u_int evmask,
358 u_int16_t state)
359 {
360 xfs_mount_t *mp = ip->i_mount;
361 xfs_trans_t *tp;
362 int error;
363
364 if (!capable(CAP_SYS_ADMIN))
365 return XFS_ERROR(EPERM);
366
367 if (XFS_FORCED_SHUTDOWN(mp))
368 return XFS_ERROR(EIO);
369
370 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
371 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
372 if (error) {
373 xfs_trans_cancel(tp, 0);
374 return error;
375 }
376 xfs_ilock(ip, XFS_ILOCK_EXCL);
377 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
378
379 ip->i_d.di_dmevmask = evmask;
380 ip->i_d.di_dmstate = state;
381
382 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
383 error = xfs_trans_commit(tp, 0);
384
385 return error;
386 }
387
388 STATIC int
389 xfs_fssetdm_by_handle(
390 struct file *parfilp,
391 void __user *arg)
392 {
393 int error;
394 struct fsdmidata fsd;
395 xfs_fsop_setdm_handlereq_t dmhreq;
396 struct dentry *dentry;
397
398 if (!capable(CAP_MKNOD))
399 return -XFS_ERROR(EPERM);
400 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
401 return -XFS_ERROR(EFAULT);
402
403 error = mnt_want_write_file(parfilp);
404 if (error)
405 return error;
406
407 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
408 if (IS_ERR(dentry)) {
409 mnt_drop_write_file(parfilp);
410 return PTR_ERR(dentry);
411 }
412
413 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
414 error = -XFS_ERROR(EPERM);
415 goto out;
416 }
417
418 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
419 error = -XFS_ERROR(EFAULT);
420 goto out;
421 }
422
423 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
424 fsd.fsd_dmstate);
425
426 out:
427 mnt_drop_write_file(parfilp);
428 dput(dentry);
429 return error;
430 }
431
432 STATIC int
433 xfs_attrlist_by_handle(
434 struct file *parfilp,
435 void __user *arg)
436 {
437 int error = -ENOMEM;
438 attrlist_cursor_kern_t *cursor;
439 xfs_fsop_attrlist_handlereq_t al_hreq;
440 struct dentry *dentry;
441 char *kbuf;
442
443 if (!capable(CAP_SYS_ADMIN))
444 return -XFS_ERROR(EPERM);
445 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
446 return -XFS_ERROR(EFAULT);
447 if (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 struct xfs_mount *mp = ip->i_mount;
646 struct xfs_trans *tp;
647 struct iattr iattr;
648 bool setprealloc = false;
649 bool clrprealloc = false;
650 int error;
651
652 /*
653 * Only allow the sys admin to reserve space unless
654 * unwritten extents are enabled.
655 */
656 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
657 !capable(CAP_SYS_ADMIN))
658 return -XFS_ERROR(EPERM);
659
660 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
661 return -XFS_ERROR(EPERM);
662
663 if (!(filp->f_mode & FMODE_WRITE))
664 return -XFS_ERROR(EBADF);
665
666 if (!S_ISREG(inode->i_mode))
667 return -XFS_ERROR(EINVAL);
668
669 error = mnt_want_write_file(filp);
670 if (error)
671 return error;
672
673 xfs_ilock(ip, XFS_IOLOCK_EXCL);
674
675 switch (bf->l_whence) {
676 case 0: /*SEEK_SET*/
677 break;
678 case 1: /*SEEK_CUR*/
679 bf->l_start += filp->f_pos;
680 break;
681 case 2: /*SEEK_END*/
682 bf->l_start += XFS_ISIZE(ip);
683 break;
684 default:
685 error = XFS_ERROR(EINVAL);
686 goto out_unlock;
687 }
688
689 /*
690 * length of <= 0 for resv/unresv/zero is invalid. length for
691 * alloc/free is ignored completely and we have no idea what userspace
692 * might have set it to, so set it to zero to allow range
693 * checks to pass.
694 */
695 switch (cmd) {
696 case XFS_IOC_ZERO_RANGE:
697 case XFS_IOC_RESVSP:
698 case XFS_IOC_RESVSP64:
699 case XFS_IOC_UNRESVSP:
700 case XFS_IOC_UNRESVSP64:
701 if (bf->l_len <= 0) {
702 error = XFS_ERROR(EINVAL);
703 goto out_unlock;
704 }
705 break;
706 default:
707 bf->l_len = 0;
708 break;
709 }
710
711 if (bf->l_start < 0 ||
712 bf->l_start > mp->m_super->s_maxbytes ||
713 bf->l_start + bf->l_len < 0 ||
714 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
715 error = XFS_ERROR(EINVAL);
716 goto out_unlock;
717 }
718
719 switch (cmd) {
720 case XFS_IOC_ZERO_RANGE:
721 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
722 if (!error)
723 setprealloc = true;
724 break;
725 case XFS_IOC_RESVSP:
726 case XFS_IOC_RESVSP64:
727 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
728 XFS_BMAPI_PREALLOC);
729 if (!error)
730 setprealloc = true;
731 break;
732 case XFS_IOC_UNRESVSP:
733 case XFS_IOC_UNRESVSP64:
734 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
735 break;
736 case XFS_IOC_ALLOCSP:
737 case XFS_IOC_ALLOCSP64:
738 case XFS_IOC_FREESP:
739 case XFS_IOC_FREESP64:
740 if (bf->l_start > XFS_ISIZE(ip)) {
741 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
742 bf->l_start - XFS_ISIZE(ip), 0);
743 if (error)
744 goto out_unlock;
745 }
746
747 iattr.ia_valid = ATTR_SIZE;
748 iattr.ia_size = bf->l_start;
749
750 error = xfs_setattr_size(ip, &iattr);
751 if (!error)
752 clrprealloc = true;
753 break;
754 default:
755 ASSERT(0);
756 error = XFS_ERROR(EINVAL);
757 }
758
759 if (error)
760 goto out_unlock;
761
762 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
763 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
764 if (error) {
765 xfs_trans_cancel(tp, 0);
766 goto out_unlock;
767 }
768
769 xfs_ilock(ip, XFS_ILOCK_EXCL);
770 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
771
772 if (!(ioflags & IO_INVIS)) {
773 ip->i_d.di_mode &= ~S_ISUID;
774 if (ip->i_d.di_mode & S_IXGRP)
775 ip->i_d.di_mode &= ~S_ISGID;
776 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
777 }
778
779 if (setprealloc)
780 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
781 else if (clrprealloc)
782 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
783
784 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
785 if (filp->f_flags & O_DSYNC)
786 xfs_trans_set_sync(tp);
787 error = xfs_trans_commit(tp, 0);
788
789 out_unlock:
790 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
791 mnt_drop_write_file(filp);
792 return -error;
793 }
794
795 STATIC int
796 xfs_ioc_bulkstat(
797 xfs_mount_t *mp,
798 unsigned int cmd,
799 void __user *arg)
800 {
801 xfs_fsop_bulkreq_t bulkreq;
802 int count; /* # of records returned */
803 xfs_ino_t inlast; /* last inode number */
804 int done;
805 int error;
806
807 /* done = 1 if there are more stats to get and if bulkstat */
808 /* should be called again (unused here, but used in dmapi) */
809
810 if (!capable(CAP_SYS_ADMIN))
811 return -EPERM;
812
813 if (XFS_FORCED_SHUTDOWN(mp))
814 return -XFS_ERROR(EIO);
815
816 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
817 return -XFS_ERROR(EFAULT);
818
819 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
820 return -XFS_ERROR(EFAULT);
821
822 if ((count = bulkreq.icount) <= 0)
823 return -XFS_ERROR(EINVAL);
824
825 if (bulkreq.ubuffer == NULL)
826 return -XFS_ERROR(EINVAL);
827
828 if (cmd == XFS_IOC_FSINUMBERS)
829 error = xfs_inumbers(mp, &inlast, &count,
830 bulkreq.ubuffer, xfs_inumbers_fmt);
831 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
832 error = xfs_bulkstat_single(mp, &inlast,
833 bulkreq.ubuffer, &done);
834 else /* XFS_IOC_FSBULKSTAT */
835 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
836 sizeof(xfs_bstat_t), bulkreq.ubuffer,
837 &done);
838
839 if (error)
840 return -error;
841
842 if (bulkreq.ocount != NULL) {
843 if (copy_to_user(bulkreq.lastip, &inlast,
844 sizeof(xfs_ino_t)))
845 return -XFS_ERROR(EFAULT);
846
847 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
848 return -XFS_ERROR(EFAULT);
849 }
850
851 return 0;
852 }
853
854 STATIC int
855 xfs_ioc_fsgeometry_v1(
856 xfs_mount_t *mp,
857 void __user *arg)
858 {
859 xfs_fsop_geom_t fsgeo;
860 int error;
861
862 error = xfs_fs_geometry(mp, &fsgeo, 3);
863 if (error)
864 return -error;
865
866 /*
867 * Caller should have passed an argument of type
868 * xfs_fsop_geom_v1_t. This is a proper subset of the
869 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
870 */
871 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
872 return -XFS_ERROR(EFAULT);
873 return 0;
874 }
875
876 STATIC int
877 xfs_ioc_fsgeometry(
878 xfs_mount_t *mp,
879 void __user *arg)
880 {
881 xfs_fsop_geom_t fsgeo;
882 int error;
883
884 error = xfs_fs_geometry(mp, &fsgeo, 4);
885 if (error)
886 return -error;
887
888 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
889 return -XFS_ERROR(EFAULT);
890 return 0;
891 }
892
893 /*
894 * Linux extended inode flags interface.
895 */
896
897 STATIC unsigned int
898 xfs_merge_ioc_xflags(
899 unsigned int flags,
900 unsigned int start)
901 {
902 unsigned int xflags = start;
903
904 if (flags & FS_IMMUTABLE_FL)
905 xflags |= XFS_XFLAG_IMMUTABLE;
906 else
907 xflags &= ~XFS_XFLAG_IMMUTABLE;
908 if (flags & FS_APPEND_FL)
909 xflags |= XFS_XFLAG_APPEND;
910 else
911 xflags &= ~XFS_XFLAG_APPEND;
912 if (flags & FS_SYNC_FL)
913 xflags |= XFS_XFLAG_SYNC;
914 else
915 xflags &= ~XFS_XFLAG_SYNC;
916 if (flags & FS_NOATIME_FL)
917 xflags |= XFS_XFLAG_NOATIME;
918 else
919 xflags &= ~XFS_XFLAG_NOATIME;
920 if (flags & FS_NODUMP_FL)
921 xflags |= XFS_XFLAG_NODUMP;
922 else
923 xflags &= ~XFS_XFLAG_NODUMP;
924
925 return xflags;
926 }
927
928 STATIC unsigned int
929 xfs_di2lxflags(
930 __uint16_t di_flags)
931 {
932 unsigned int flags = 0;
933
934 if (di_flags & XFS_DIFLAG_IMMUTABLE)
935 flags |= FS_IMMUTABLE_FL;
936 if (di_flags & XFS_DIFLAG_APPEND)
937 flags |= FS_APPEND_FL;
938 if (di_flags & XFS_DIFLAG_SYNC)
939 flags |= FS_SYNC_FL;
940 if (di_flags & XFS_DIFLAG_NOATIME)
941 flags |= FS_NOATIME_FL;
942 if (di_flags & XFS_DIFLAG_NODUMP)
943 flags |= FS_NODUMP_FL;
944 return flags;
945 }
946
947 STATIC int
948 xfs_ioc_fsgetxattr(
949 xfs_inode_t *ip,
950 int attr,
951 void __user *arg)
952 {
953 struct fsxattr fa;
954
955 memset(&fa, 0, sizeof(struct fsxattr));
956
957 xfs_ilock(ip, XFS_ILOCK_SHARED);
958 fa.fsx_xflags = xfs_ip2xflags(ip);
959 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
960 fa.fsx_projid = xfs_get_projid(ip);
961
962 if (attr) {
963 if (ip->i_afp) {
964 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
965 fa.fsx_nextents = ip->i_afp->if_bytes /
966 sizeof(xfs_bmbt_rec_t);
967 else
968 fa.fsx_nextents = ip->i_d.di_anextents;
969 } else
970 fa.fsx_nextents = 0;
971 } else {
972 if (ip->i_df.if_flags & XFS_IFEXTENTS)
973 fa.fsx_nextents = ip->i_df.if_bytes /
974 sizeof(xfs_bmbt_rec_t);
975 else
976 fa.fsx_nextents = ip->i_d.di_nextents;
977 }
978 xfs_iunlock(ip, XFS_ILOCK_SHARED);
979
980 if (copy_to_user(arg, &fa, sizeof(fa)))
981 return -EFAULT;
982 return 0;
983 }
984
985 STATIC void
986 xfs_set_diflags(
987 struct xfs_inode *ip,
988 unsigned int xflags)
989 {
990 unsigned int di_flags;
991
992 /* can't set PREALLOC this way, just preserve it */
993 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
994 if (xflags & XFS_XFLAG_IMMUTABLE)
995 di_flags |= XFS_DIFLAG_IMMUTABLE;
996 if (xflags & XFS_XFLAG_APPEND)
997 di_flags |= XFS_DIFLAG_APPEND;
998 if (xflags & XFS_XFLAG_SYNC)
999 di_flags |= XFS_DIFLAG_SYNC;
1000 if (xflags & XFS_XFLAG_NOATIME)
1001 di_flags |= XFS_DIFLAG_NOATIME;
1002 if (xflags & XFS_XFLAG_NODUMP)
1003 di_flags |= XFS_DIFLAG_NODUMP;
1004 if (xflags & XFS_XFLAG_PROJINHERIT)
1005 di_flags |= XFS_DIFLAG_PROJINHERIT;
1006 if (xflags & XFS_XFLAG_NODEFRAG)
1007 di_flags |= XFS_DIFLAG_NODEFRAG;
1008 if (xflags & XFS_XFLAG_FILESTREAM)
1009 di_flags |= XFS_DIFLAG_FILESTREAM;
1010 if (S_ISDIR(ip->i_d.di_mode)) {
1011 if (xflags & XFS_XFLAG_RTINHERIT)
1012 di_flags |= XFS_DIFLAG_RTINHERIT;
1013 if (xflags & XFS_XFLAG_NOSYMLINKS)
1014 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1015 if (xflags & XFS_XFLAG_EXTSZINHERIT)
1016 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1017 } else if (S_ISREG(ip->i_d.di_mode)) {
1018 if (xflags & XFS_XFLAG_REALTIME)
1019 di_flags |= XFS_DIFLAG_REALTIME;
1020 if (xflags & XFS_XFLAG_EXTSIZE)
1021 di_flags |= XFS_DIFLAG_EXTSIZE;
1022 }
1023
1024 ip->i_d.di_flags = di_flags;
1025 }
1026
1027 STATIC void
1028 xfs_diflags_to_linux(
1029 struct xfs_inode *ip)
1030 {
1031 struct inode *inode = VFS_I(ip);
1032 unsigned int xflags = xfs_ip2xflags(ip);
1033
1034 if (xflags & XFS_XFLAG_IMMUTABLE)
1035 inode->i_flags |= S_IMMUTABLE;
1036 else
1037 inode->i_flags &= ~S_IMMUTABLE;
1038 if (xflags & XFS_XFLAG_APPEND)
1039 inode->i_flags |= S_APPEND;
1040 else
1041 inode->i_flags &= ~S_APPEND;
1042 if (xflags & XFS_XFLAG_SYNC)
1043 inode->i_flags |= S_SYNC;
1044 else
1045 inode->i_flags &= ~S_SYNC;
1046 if (xflags & XFS_XFLAG_NOATIME)
1047 inode->i_flags |= S_NOATIME;
1048 else
1049 inode->i_flags &= ~S_NOATIME;
1050 }
1051
1052 #define FSX_PROJID 1
1053 #define FSX_EXTSIZE 2
1054 #define FSX_XFLAGS 4
1055 #define FSX_NONBLOCK 8
1056
1057 STATIC int
1058 xfs_ioctl_setattr(
1059 xfs_inode_t *ip,
1060 struct fsxattr *fa,
1061 int mask)
1062 {
1063 struct xfs_mount *mp = ip->i_mount;
1064 struct xfs_trans *tp;
1065 unsigned int lock_flags = 0;
1066 struct xfs_dquot *udqp = NULL;
1067 struct xfs_dquot *pdqp = NULL;
1068 struct xfs_dquot *olddquot = NULL;
1069 int code;
1070
1071 trace_xfs_ioctl_setattr(ip);
1072
1073 if (mp->m_flags & XFS_MOUNT_RDONLY)
1074 return XFS_ERROR(EROFS);
1075 if (XFS_FORCED_SHUTDOWN(mp))
1076 return XFS_ERROR(EIO);
1077
1078 /*
1079 * Disallow 32bit project ids when projid32bit feature is not enabled.
1080 */
1081 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
1082 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1083 return XFS_ERROR(EINVAL);
1084
1085 /*
1086 * If disk quotas is on, we make sure that the dquots do exist on disk,
1087 * before we start any other transactions. Trying to do this later
1088 * is messy. We don't care to take a readlock to look at the ids
1089 * in inode here, because we can't hold it across the trans_reserve.
1090 * If the IDs do change before we take the ilock, we're covered
1091 * because the i_*dquot fields will get updated anyway.
1092 */
1093 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
1094 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1095 ip->i_d.di_gid, fa->fsx_projid,
1096 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1097 if (code)
1098 return code;
1099 }
1100
1101 /*
1102 * For the other attributes, we acquire the inode lock and
1103 * first do an error checking pass.
1104 */
1105 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1106 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1107 if (code)
1108 goto error_return;
1109
1110 lock_flags = XFS_ILOCK_EXCL;
1111 xfs_ilock(ip, lock_flags);
1112
1113 /*
1114 * CAP_FOWNER overrides the following restrictions:
1115 *
1116 * The user ID of the calling process must be equal
1117 * to the file owner ID, except in cases where the
1118 * CAP_FSETID capability is applicable.
1119 */
1120 if (!inode_owner_or_capable(VFS_I(ip))) {
1121 code = XFS_ERROR(EPERM);
1122 goto error_return;
1123 }
1124
1125 /*
1126 * Do a quota reservation only if projid is actually going to change.
1127 * Only allow changing of projid from init_user_ns since it is a
1128 * non user namespace aware identifier.
1129 */
1130 if (mask & FSX_PROJID) {
1131 if (current_user_ns() != &init_user_ns) {
1132 code = XFS_ERROR(EINVAL);
1133 goto error_return;
1134 }
1135
1136 if (XFS_IS_QUOTA_RUNNING(mp) &&
1137 XFS_IS_PQUOTA_ON(mp) &&
1138 xfs_get_projid(ip) != fa->fsx_projid) {
1139 ASSERT(tp);
1140 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1141 pdqp, capable(CAP_FOWNER) ?
1142 XFS_QMOPT_FORCE_RES : 0);
1143 if (code) /* out of quota */
1144 goto error_return;
1145 }
1146 }
1147
1148 if (mask & FSX_EXTSIZE) {
1149 /*
1150 * Can't change extent size if any extents are allocated.
1151 */
1152 if (ip->i_d.di_nextents &&
1153 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1154 fa->fsx_extsize)) {
1155 code = XFS_ERROR(EINVAL); /* EFBIG? */
1156 goto error_return;
1157 }
1158
1159 /*
1160 * Extent size must be a multiple of the appropriate block
1161 * size, if set at all. It must also be smaller than the
1162 * maximum extent size supported by the filesystem.
1163 *
1164 * Also, for non-realtime files, limit the extent size hint to
1165 * half the size of the AGs in the filesystem so alignment
1166 * doesn't result in extents larger than an AG.
1167 */
1168 if (fa->fsx_extsize != 0) {
1169 xfs_extlen_t size;
1170 xfs_fsblock_t extsize_fsb;
1171
1172 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1173 if (extsize_fsb > MAXEXTLEN) {
1174 code = XFS_ERROR(EINVAL);
1175 goto error_return;
1176 }
1177
1178 if (XFS_IS_REALTIME_INODE(ip) ||
1179 ((mask & FSX_XFLAGS) &&
1180 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1181 size = mp->m_sb.sb_rextsize <<
1182 mp->m_sb.sb_blocklog;
1183 } else {
1184 size = mp->m_sb.sb_blocksize;
1185 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1186 code = XFS_ERROR(EINVAL);
1187 goto error_return;
1188 }
1189 }
1190
1191 if (fa->fsx_extsize % size) {
1192 code = XFS_ERROR(EINVAL);
1193 goto error_return;
1194 }
1195 }
1196 }
1197
1198
1199 if (mask & FSX_XFLAGS) {
1200 /*
1201 * Can't change realtime flag if any extents are allocated.
1202 */
1203 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1204 (XFS_IS_REALTIME_INODE(ip)) !=
1205 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1206 code = XFS_ERROR(EINVAL); /* EFBIG? */
1207 goto error_return;
1208 }
1209
1210 /*
1211 * If realtime flag is set then must have realtime data.
1212 */
1213 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1214 if ((mp->m_sb.sb_rblocks == 0) ||
1215 (mp->m_sb.sb_rextsize == 0) ||
1216 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1217 code = XFS_ERROR(EINVAL);
1218 goto error_return;
1219 }
1220 }
1221
1222 /*
1223 * Can't modify an immutable/append-only file unless
1224 * we have appropriate permission.
1225 */
1226 if ((ip->i_d.di_flags &
1227 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1228 (fa->fsx_xflags &
1229 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1230 !capable(CAP_LINUX_IMMUTABLE)) {
1231 code = XFS_ERROR(EPERM);
1232 goto error_return;
1233 }
1234 }
1235
1236 xfs_trans_ijoin(tp, ip, 0);
1237
1238 /*
1239 * Change file ownership. Must be the owner or privileged.
1240 */
1241 if (mask & FSX_PROJID) {
1242 /*
1243 * CAP_FSETID overrides the following restrictions:
1244 *
1245 * The set-user-ID and set-group-ID bits of a file will be
1246 * cleared upon successful return from chown()
1247 */
1248 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1249 !inode_capable(VFS_I(ip), CAP_FSETID))
1250 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1251
1252 /*
1253 * Change the ownerships and register quota modifications
1254 * in the transaction.
1255 */
1256 if (xfs_get_projid(ip) != fa->fsx_projid) {
1257 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1258 olddquot = xfs_qm_vop_chown(tp, ip,
1259 &ip->i_pdquot, pdqp);
1260 }
1261 xfs_set_projid(ip, fa->fsx_projid);
1262
1263 /*
1264 * We may have to rev the inode as well as
1265 * the superblock version number since projids didn't
1266 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1267 */
1268 if (ip->i_d.di_version == 1)
1269 xfs_bump_ino_vers2(tp, ip);
1270 }
1271
1272 }
1273
1274 if (mask & FSX_EXTSIZE)
1275 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1276 if (mask & FSX_XFLAGS) {
1277 xfs_set_diflags(ip, fa->fsx_xflags);
1278 xfs_diflags_to_linux(ip);
1279 }
1280
1281 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1282 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1283
1284 XFS_STATS_INC(xs_ig_attrchg);
1285
1286 /*
1287 * If this is a synchronous mount, make sure that the
1288 * transaction goes to disk before returning to the user.
1289 * This is slightly sub-optimal in that truncates require
1290 * two sync transactions instead of one for wsync filesystems.
1291 * One for the truncate and one for the timestamps since we
1292 * don't want to change the timestamps unless we're sure the
1293 * truncate worked. Truncates are less than 1% of the laddis
1294 * mix so this probably isn't worth the trouble to optimize.
1295 */
1296 if (mp->m_flags & XFS_MOUNT_WSYNC)
1297 xfs_trans_set_sync(tp);
1298 code = xfs_trans_commit(tp, 0);
1299 xfs_iunlock(ip, lock_flags);
1300
1301 /*
1302 * Release any dquot(s) the inode had kept before chown.
1303 */
1304 xfs_qm_dqrele(olddquot);
1305 xfs_qm_dqrele(udqp);
1306 xfs_qm_dqrele(pdqp);
1307
1308 return code;
1309
1310 error_return:
1311 xfs_qm_dqrele(udqp);
1312 xfs_qm_dqrele(pdqp);
1313 xfs_trans_cancel(tp, 0);
1314 if (lock_flags)
1315 xfs_iunlock(ip, lock_flags);
1316 return code;
1317 }
1318
1319 STATIC int
1320 xfs_ioc_fssetxattr(
1321 xfs_inode_t *ip,
1322 struct file *filp,
1323 void __user *arg)
1324 {
1325 struct fsxattr fa;
1326 unsigned int mask;
1327 int error;
1328
1329 if (copy_from_user(&fa, arg, sizeof(fa)))
1330 return -EFAULT;
1331
1332 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1333 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1334 mask |= FSX_NONBLOCK;
1335
1336 error = mnt_want_write_file(filp);
1337 if (error)
1338 return error;
1339 error = xfs_ioctl_setattr(ip, &fa, mask);
1340 mnt_drop_write_file(filp);
1341 return -error;
1342 }
1343
1344 STATIC int
1345 xfs_ioc_getxflags(
1346 xfs_inode_t *ip,
1347 void __user *arg)
1348 {
1349 unsigned int flags;
1350
1351 flags = xfs_di2lxflags(ip->i_d.di_flags);
1352 if (copy_to_user(arg, &flags, sizeof(flags)))
1353 return -EFAULT;
1354 return 0;
1355 }
1356
1357 STATIC int
1358 xfs_ioc_setxflags(
1359 xfs_inode_t *ip,
1360 struct file *filp,
1361 void __user *arg)
1362 {
1363 struct fsxattr fa;
1364 unsigned int flags;
1365 unsigned int mask;
1366 int error;
1367
1368 if (copy_from_user(&flags, arg, sizeof(flags)))
1369 return -EFAULT;
1370
1371 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1372 FS_NOATIME_FL | FS_NODUMP_FL | \
1373 FS_SYNC_FL))
1374 return -EOPNOTSUPP;
1375
1376 mask = FSX_XFLAGS;
1377 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1378 mask |= FSX_NONBLOCK;
1379 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1380
1381 error = mnt_want_write_file(filp);
1382 if (error)
1383 return error;
1384 error = xfs_ioctl_setattr(ip, &fa, mask);
1385 mnt_drop_write_file(filp);
1386 return -error;
1387 }
1388
1389 STATIC int
1390 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1391 {
1392 struct getbmap __user *base = *ap;
1393
1394 /* copy only getbmap portion (not getbmapx) */
1395 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1396 return XFS_ERROR(EFAULT);
1397
1398 *ap += sizeof(struct getbmap);
1399 return 0;
1400 }
1401
1402 STATIC int
1403 xfs_ioc_getbmap(
1404 struct xfs_inode *ip,
1405 int ioflags,
1406 unsigned int cmd,
1407 void __user *arg)
1408 {
1409 struct getbmapx bmx;
1410 int error;
1411
1412 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1413 return -XFS_ERROR(EFAULT);
1414
1415 if (bmx.bmv_count < 2)
1416 return -XFS_ERROR(EINVAL);
1417
1418 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1419 if (ioflags & IO_INVIS)
1420 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1421
1422 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1423 (struct getbmap *)arg+1);
1424 if (error)
1425 return -error;
1426
1427 /* copy back header - only size of getbmap */
1428 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1429 return -XFS_ERROR(EFAULT);
1430 return 0;
1431 }
1432
1433 STATIC int
1434 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1435 {
1436 struct getbmapx __user *base = *ap;
1437
1438 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1439 return XFS_ERROR(EFAULT);
1440
1441 *ap += sizeof(struct getbmapx);
1442 return 0;
1443 }
1444
1445 STATIC int
1446 xfs_ioc_getbmapx(
1447 struct xfs_inode *ip,
1448 void __user *arg)
1449 {
1450 struct getbmapx bmx;
1451 int error;
1452
1453 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1454 return -XFS_ERROR(EFAULT);
1455
1456 if (bmx.bmv_count < 2)
1457 return -XFS_ERROR(EINVAL);
1458
1459 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1460 return -XFS_ERROR(EINVAL);
1461
1462 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1463 (struct getbmapx *)arg+1);
1464 if (error)
1465 return -error;
1466
1467 /* copy back header */
1468 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1469 return -XFS_ERROR(EFAULT);
1470
1471 return 0;
1472 }
1473
1474 int
1475 xfs_ioc_swapext(
1476 xfs_swapext_t *sxp)
1477 {
1478 xfs_inode_t *ip, *tip;
1479 struct fd f, tmp;
1480 int error = 0;
1481
1482 /* Pull information for the target fd */
1483 f = fdget((int)sxp->sx_fdtarget);
1484 if (!f.file) {
1485 error = XFS_ERROR(EINVAL);
1486 goto out;
1487 }
1488
1489 if (!(f.file->f_mode & FMODE_WRITE) ||
1490 !(f.file->f_mode & FMODE_READ) ||
1491 (f.file->f_flags & O_APPEND)) {
1492 error = XFS_ERROR(EBADF);
1493 goto out_put_file;
1494 }
1495
1496 tmp = fdget((int)sxp->sx_fdtmp);
1497 if (!tmp.file) {
1498 error = XFS_ERROR(EINVAL);
1499 goto out_put_file;
1500 }
1501
1502 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1503 !(tmp.file->f_mode & FMODE_READ) ||
1504 (tmp.file->f_flags & O_APPEND)) {
1505 error = XFS_ERROR(EBADF);
1506 goto out_put_tmp_file;
1507 }
1508
1509 if (IS_SWAPFILE(file_inode(f.file)) ||
1510 IS_SWAPFILE(file_inode(tmp.file))) {
1511 error = XFS_ERROR(EINVAL);
1512 goto out_put_tmp_file;
1513 }
1514
1515 ip = XFS_I(file_inode(f.file));
1516 tip = XFS_I(file_inode(tmp.file));
1517
1518 if (ip->i_mount != tip->i_mount) {
1519 error = XFS_ERROR(EINVAL);
1520 goto out_put_tmp_file;
1521 }
1522
1523 if (ip->i_ino == tip->i_ino) {
1524 error = XFS_ERROR(EINVAL);
1525 goto out_put_tmp_file;
1526 }
1527
1528 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1529 error = XFS_ERROR(EIO);
1530 goto out_put_tmp_file;
1531 }
1532
1533 error = xfs_swap_extents(ip, tip, sxp);
1534
1535 out_put_tmp_file:
1536 fdput(tmp);
1537 out_put_file:
1538 fdput(f);
1539 out:
1540 return error;
1541 }
1542
1543 /*
1544 * Note: some of the ioctl's return positive numbers as a
1545 * byte count indicating success, such as readlink_by_handle.
1546 * So we don't "sign flip" like most other routines. This means
1547 * true errors need to be returned as a negative value.
1548 */
1549 long
1550 xfs_file_ioctl(
1551 struct file *filp,
1552 unsigned int cmd,
1553 unsigned long p)
1554 {
1555 struct inode *inode = file_inode(filp);
1556 struct xfs_inode *ip = XFS_I(inode);
1557 struct xfs_mount *mp = ip->i_mount;
1558 void __user *arg = (void __user *)p;
1559 int ioflags = 0;
1560 int error;
1561
1562 if (filp->f_mode & FMODE_NOCMTIME)
1563 ioflags |= IO_INVIS;
1564
1565 trace_xfs_file_ioctl(ip);
1566
1567 switch (cmd) {
1568 case FITRIM:
1569 return xfs_ioc_trim(mp, arg);
1570 case XFS_IOC_ALLOCSP:
1571 case XFS_IOC_FREESP:
1572 case XFS_IOC_RESVSP:
1573 case XFS_IOC_UNRESVSP:
1574 case XFS_IOC_ALLOCSP64:
1575 case XFS_IOC_FREESP64:
1576 case XFS_IOC_RESVSP64:
1577 case XFS_IOC_UNRESVSP64:
1578 case XFS_IOC_ZERO_RANGE: {
1579 xfs_flock64_t bf;
1580
1581 if (copy_from_user(&bf, arg, sizeof(bf)))
1582 return -XFS_ERROR(EFAULT);
1583 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1584 }
1585 case XFS_IOC_DIOINFO: {
1586 struct dioattr da;
1587 xfs_buftarg_t *target =
1588 XFS_IS_REALTIME_INODE(ip) ?
1589 mp->m_rtdev_targp : mp->m_ddev_targp;
1590
1591 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1592 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1593
1594 if (copy_to_user(arg, &da, sizeof(da)))
1595 return -XFS_ERROR(EFAULT);
1596 return 0;
1597 }
1598
1599 case XFS_IOC_FSBULKSTAT_SINGLE:
1600 case XFS_IOC_FSBULKSTAT:
1601 case XFS_IOC_FSINUMBERS:
1602 return xfs_ioc_bulkstat(mp, cmd, arg);
1603
1604 case XFS_IOC_FSGEOMETRY_V1:
1605 return xfs_ioc_fsgeometry_v1(mp, arg);
1606
1607 case XFS_IOC_FSGEOMETRY:
1608 return xfs_ioc_fsgeometry(mp, arg);
1609
1610 case XFS_IOC_GETVERSION:
1611 return put_user(inode->i_generation, (int __user *)arg);
1612
1613 case XFS_IOC_FSGETXATTR:
1614 return xfs_ioc_fsgetxattr(ip, 0, arg);
1615 case XFS_IOC_FSGETXATTRA:
1616 return xfs_ioc_fsgetxattr(ip, 1, arg);
1617 case XFS_IOC_FSSETXATTR:
1618 return xfs_ioc_fssetxattr(ip, filp, arg);
1619 case XFS_IOC_GETXFLAGS:
1620 return xfs_ioc_getxflags(ip, arg);
1621 case XFS_IOC_SETXFLAGS:
1622 return xfs_ioc_setxflags(ip, filp, arg);
1623
1624 case XFS_IOC_FSSETDM: {
1625 struct fsdmidata dmi;
1626
1627 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1628 return -XFS_ERROR(EFAULT);
1629
1630 error = mnt_want_write_file(filp);
1631 if (error)
1632 return error;
1633
1634 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1635 dmi.fsd_dmstate);
1636 mnt_drop_write_file(filp);
1637 return -error;
1638 }
1639
1640 case XFS_IOC_GETBMAP:
1641 case XFS_IOC_GETBMAPA:
1642 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1643
1644 case XFS_IOC_GETBMAPX:
1645 return xfs_ioc_getbmapx(ip, arg);
1646
1647 case XFS_IOC_FD_TO_HANDLE:
1648 case XFS_IOC_PATH_TO_HANDLE:
1649 case XFS_IOC_PATH_TO_FSHANDLE: {
1650 xfs_fsop_handlereq_t hreq;
1651
1652 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1653 return -XFS_ERROR(EFAULT);
1654 return xfs_find_handle(cmd, &hreq);
1655 }
1656 case XFS_IOC_OPEN_BY_HANDLE: {
1657 xfs_fsop_handlereq_t hreq;
1658
1659 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1660 return -XFS_ERROR(EFAULT);
1661 return xfs_open_by_handle(filp, &hreq);
1662 }
1663 case XFS_IOC_FSSETDM_BY_HANDLE:
1664 return xfs_fssetdm_by_handle(filp, arg);
1665
1666 case XFS_IOC_READLINK_BY_HANDLE: {
1667 xfs_fsop_handlereq_t hreq;
1668
1669 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1670 return -XFS_ERROR(EFAULT);
1671 return xfs_readlink_by_handle(filp, &hreq);
1672 }
1673 case XFS_IOC_ATTRLIST_BY_HANDLE:
1674 return xfs_attrlist_by_handle(filp, arg);
1675
1676 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1677 return xfs_attrmulti_by_handle(filp, arg);
1678
1679 case XFS_IOC_SWAPEXT: {
1680 struct xfs_swapext sxp;
1681
1682 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1683 return -XFS_ERROR(EFAULT);
1684 error = mnt_want_write_file(filp);
1685 if (error)
1686 return error;
1687 error = xfs_ioc_swapext(&sxp);
1688 mnt_drop_write_file(filp);
1689 return -error;
1690 }
1691
1692 case XFS_IOC_FSCOUNTS: {
1693 xfs_fsop_counts_t out;
1694
1695 error = xfs_fs_counts(mp, &out);
1696 if (error)
1697 return -error;
1698
1699 if (copy_to_user(arg, &out, sizeof(out)))
1700 return -XFS_ERROR(EFAULT);
1701 return 0;
1702 }
1703
1704 case XFS_IOC_SET_RESBLKS: {
1705 xfs_fsop_resblks_t inout;
1706 __uint64_t in;
1707
1708 if (!capable(CAP_SYS_ADMIN))
1709 return -EPERM;
1710
1711 if (mp->m_flags & XFS_MOUNT_RDONLY)
1712 return -XFS_ERROR(EROFS);
1713
1714 if (copy_from_user(&inout, arg, sizeof(inout)))
1715 return -XFS_ERROR(EFAULT);
1716
1717 error = mnt_want_write_file(filp);
1718 if (error)
1719 return error;
1720
1721 /* input parameter is passed in resblks field of structure */
1722 in = inout.resblks;
1723 error = xfs_reserve_blocks(mp, &in, &inout);
1724 mnt_drop_write_file(filp);
1725 if (error)
1726 return -error;
1727
1728 if (copy_to_user(arg, &inout, sizeof(inout)))
1729 return -XFS_ERROR(EFAULT);
1730 return 0;
1731 }
1732
1733 case XFS_IOC_GET_RESBLKS: {
1734 xfs_fsop_resblks_t out;
1735
1736 if (!capable(CAP_SYS_ADMIN))
1737 return -EPERM;
1738
1739 error = xfs_reserve_blocks(mp, NULL, &out);
1740 if (error)
1741 return -error;
1742
1743 if (copy_to_user(arg, &out, sizeof(out)))
1744 return -XFS_ERROR(EFAULT);
1745
1746 return 0;
1747 }
1748
1749 case XFS_IOC_FSGROWFSDATA: {
1750 xfs_growfs_data_t in;
1751
1752 if (copy_from_user(&in, arg, sizeof(in)))
1753 return -XFS_ERROR(EFAULT);
1754
1755 error = mnt_want_write_file(filp);
1756 if (error)
1757 return error;
1758 error = xfs_growfs_data(mp, &in);
1759 mnt_drop_write_file(filp);
1760 return -error;
1761 }
1762
1763 case XFS_IOC_FSGROWFSLOG: {
1764 xfs_growfs_log_t in;
1765
1766 if (copy_from_user(&in, arg, sizeof(in)))
1767 return -XFS_ERROR(EFAULT);
1768
1769 error = mnt_want_write_file(filp);
1770 if (error)
1771 return error;
1772 error = xfs_growfs_log(mp, &in);
1773 mnt_drop_write_file(filp);
1774 return -error;
1775 }
1776
1777 case XFS_IOC_FSGROWFSRT: {
1778 xfs_growfs_rt_t in;
1779
1780 if (copy_from_user(&in, arg, sizeof(in)))
1781 return -XFS_ERROR(EFAULT);
1782
1783 error = mnt_want_write_file(filp);
1784 if (error)
1785 return error;
1786 error = xfs_growfs_rt(mp, &in);
1787 mnt_drop_write_file(filp);
1788 return -error;
1789 }
1790
1791 case XFS_IOC_GOINGDOWN: {
1792 __uint32_t in;
1793
1794 if (!capable(CAP_SYS_ADMIN))
1795 return -EPERM;
1796
1797 if (get_user(in, (__uint32_t __user *)arg))
1798 return -XFS_ERROR(EFAULT);
1799
1800 error = xfs_fs_goingdown(mp, in);
1801 return -error;
1802 }
1803
1804 case XFS_IOC_ERROR_INJECTION: {
1805 xfs_error_injection_t in;
1806
1807 if (!capable(CAP_SYS_ADMIN))
1808 return -EPERM;
1809
1810 if (copy_from_user(&in, arg, sizeof(in)))
1811 return -XFS_ERROR(EFAULT);
1812
1813 error = xfs_errortag_add(in.errtag, mp);
1814 return -error;
1815 }
1816
1817 case XFS_IOC_ERROR_CLEARALL:
1818 if (!capable(CAP_SYS_ADMIN))
1819 return -EPERM;
1820
1821 error = xfs_errortag_clearall(mp, 1);
1822 return -error;
1823
1824 case XFS_IOC_FREE_EOFBLOCKS: {
1825 struct xfs_fs_eofblocks eofb;
1826 struct xfs_eofblocks keofb;
1827
1828 if (!capable(CAP_SYS_ADMIN))
1829 return -EPERM;
1830
1831 if (mp->m_flags & XFS_MOUNT_RDONLY)
1832 return -XFS_ERROR(EROFS);
1833
1834 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1835 return -XFS_ERROR(EFAULT);
1836
1837 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1838 if (error)
1839 return -error;
1840
1841 return -xfs_icache_free_eofblocks(mp, &keofb);
1842 }
1843
1844 default:
1845 return -ENOTTY;
1846 }
1847 }
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