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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_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#include "xfs_pnfs.h"
43#include "xfs_acl.h"
44
45#include <linux/capability.h>
46#include <linux/dcache.h>
47#include <linux/mount.h>
48#include <linux/namei.h>
49#include <linux/pagemap.h>
50#include <linux/slab.h>
51#include <linux/exportfs.h>
52
53/*
54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
55 * a file or fs handle.
56 *
57 * XFS_IOC_PATH_TO_FSHANDLE
58 * returns fs handle for a mount point or path within that mount point
59 * XFS_IOC_FD_TO_HANDLE
60 * returns full handle for a FD opened in user space
61 * XFS_IOC_PATH_TO_HANDLE
62 * returns full handle for a path
63 */
64int
65xfs_find_handle(
66 unsigned int cmd,
67 xfs_fsop_handlereq_t *hreq)
68{
69 int hsize;
70 xfs_handle_t handle;
71 struct inode *inode;
72 struct fd f = {NULL};
73 struct path path;
74 int error;
75 struct xfs_inode *ip;
76
77 if (cmd == XFS_IOC_FD_TO_HANDLE) {
78 f = fdget(hreq->fd);
79 if (!f.file)
80 return -EBADF;
81 inode = file_inode(f.file);
82 } else {
83 error = user_lpath((const char __user *)hreq->path, &path);
84 if (error)
85 return error;
86 inode = d_inode(path.dentry);
87 }
88 ip = XFS_I(inode);
89
90 /*
91 * We can only generate handles for inodes residing on a XFS filesystem,
92 * and only for regular files, directories or symbolic links.
93 */
94 error = -EINVAL;
95 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
96 goto out_put;
97
98 error = -EBADF;
99 if (!S_ISREG(inode->i_mode) &&
100 !S_ISDIR(inode->i_mode) &&
101 !S_ISLNK(inode->i_mode))
102 goto out_put;
103
104
105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
106
107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
108 /*
109 * This handle only contains an fsid, zero the rest.
110 */
111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
112 hsize = sizeof(xfs_fsid_t);
113 } else {
114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
115 sizeof(handle.ha_fid.fid_len);
116 handle.ha_fid.fid_pad = 0;
117 handle.ha_fid.fid_gen = inode->i_generation;
118 handle.ha_fid.fid_ino = ip->i_ino;
119
120 hsize = XFS_HSIZE(handle);
121 }
122
123 error = -EFAULT;
124 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
126 goto out_put;
127
128 error = 0;
129
130 out_put:
131 if (cmd == XFS_IOC_FD_TO_HANDLE)
132 fdput(f);
133 else
134 path_put(&path);
135 return error;
136}
137
138/*
139 * No need to do permission checks on the various pathname components
140 * as the handle operations are privileged.
141 */
142STATIC int
143xfs_handle_acceptable(
144 void *context,
145 struct dentry *dentry)
146{
147 return 1;
148}
149
150/*
151 * Convert userspace handle data into a dentry.
152 */
153struct dentry *
154xfs_handle_to_dentry(
155 struct file *parfilp,
156 void __user *uhandle,
157 u32 hlen)
158{
159 xfs_handle_t handle;
160 struct xfs_fid64 fid;
161
162 /*
163 * Only allow handle opens under a directory.
164 */
165 if (!S_ISDIR(file_inode(parfilp)->i_mode))
166 return ERR_PTR(-ENOTDIR);
167
168 if (hlen != sizeof(xfs_handle_t))
169 return ERR_PTR(-EINVAL);
170 if (copy_from_user(&handle, uhandle, hlen))
171 return ERR_PTR(-EFAULT);
172 if (handle.ha_fid.fid_len !=
173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
174 return ERR_PTR(-EINVAL);
175
176 memset(&fid, 0, sizeof(struct fid));
177 fid.ino = handle.ha_fid.fid_ino;
178 fid.gen = handle.ha_fid.fid_gen;
179
180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
182 xfs_handle_acceptable, NULL);
183}
184
185STATIC struct dentry *
186xfs_handlereq_to_dentry(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
189{
190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
191}
192
193int
194xfs_open_by_handle(
195 struct file *parfilp,
196 xfs_fsop_handlereq_t *hreq)
197{
198 const struct cred *cred = current_cred();
199 int error;
200 int fd;
201 int permflag;
202 struct file *filp;
203 struct inode *inode;
204 struct dentry *dentry;
205 fmode_t fmode;
206 struct path path;
207
208 if (!capable(CAP_SYS_ADMIN))
209 return -EPERM;
210
211 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
212 if (IS_ERR(dentry))
213 return PTR_ERR(dentry);
214 inode = d_inode(dentry);
215
216 /* Restrict xfs_open_by_handle to directories & regular files. */
217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
218 error = -EPERM;
219 goto out_dput;
220 }
221
222#if BITS_PER_LONG != 32
223 hreq->oflags |= O_LARGEFILE;
224#endif
225
226 permflag = hreq->oflags;
227 fmode = OPEN_FMODE(permflag);
228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
230 error = -EPERM;
231 goto out_dput;
232 }
233
234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
235 error = -EPERM;
236 goto out_dput;
237 }
238
239 /* Can't write directories. */
240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
241 error = -EISDIR;
242 goto out_dput;
243 }
244
245 fd = get_unused_fd_flags(0);
246 if (fd < 0) {
247 error = fd;
248 goto out_dput;
249 }
250
251 path.mnt = parfilp->f_path.mnt;
252 path.dentry = dentry;
253 filp = dentry_open(&path, hreq->oflags, cred);
254 dput(dentry);
255 if (IS_ERR(filp)) {
256 put_unused_fd(fd);
257 return PTR_ERR(filp);
258 }
259
260 if (S_ISREG(inode->i_mode)) {
261 filp->f_flags |= O_NOATIME;
262 filp->f_mode |= FMODE_NOCMTIME;
263 }
264
265 fd_install(fd, filp);
266 return fd;
267
268 out_dput:
269 dput(dentry);
270 return error;
271}
272
273int
274xfs_readlink_by_handle(
275 struct file *parfilp,
276 xfs_fsop_handlereq_t *hreq)
277{
278 struct dentry *dentry;
279 __u32 olen;
280 int error;
281
282 if (!capable(CAP_SYS_ADMIN))
283 return -EPERM;
284
285 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
286 if (IS_ERR(dentry))
287 return PTR_ERR(dentry);
288
289 /* Restrict this handle operation to symlinks only. */
290 if (!d_is_symlink(dentry)) {
291 error = -EINVAL;
292 goto out_dput;
293 }
294
295 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
296 error = -EFAULT;
297 goto out_dput;
298 }
299
300 error = vfs_readlink(dentry, hreq->ohandle, olen);
301
302 out_dput:
303 dput(dentry);
304 return error;
305}
306
307int
308xfs_set_dmattrs(
309 xfs_inode_t *ip,
310 u_int evmask,
311 u_int16_t state)
312{
313 xfs_mount_t *mp = ip->i_mount;
314 xfs_trans_t *tp;
315 int error;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -EPERM;
319
320 if (XFS_FORCED_SHUTDOWN(mp))
321 return -EIO;
322
323 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
324 if (error)
325 return error;
326
327 xfs_ilock(ip, XFS_ILOCK_EXCL);
328 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
329
330 ip->i_d.di_dmevmask = evmask;
331 ip->i_d.di_dmstate = state;
332
333 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
334 error = xfs_trans_commit(tp);
335
336 return error;
337}
338
339STATIC int
340xfs_fssetdm_by_handle(
341 struct file *parfilp,
342 void __user *arg)
343{
344 int error;
345 struct fsdmidata fsd;
346 xfs_fsop_setdm_handlereq_t dmhreq;
347 struct dentry *dentry;
348
349 if (!capable(CAP_MKNOD))
350 return -EPERM;
351 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
352 return -EFAULT;
353
354 error = mnt_want_write_file(parfilp);
355 if (error)
356 return error;
357
358 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
359 if (IS_ERR(dentry)) {
360 mnt_drop_write_file(parfilp);
361 return PTR_ERR(dentry);
362 }
363
364 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
365 error = -EPERM;
366 goto out;
367 }
368
369 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
370 error = -EFAULT;
371 goto out;
372 }
373
374 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
375 fsd.fsd_dmstate);
376
377 out:
378 mnt_drop_write_file(parfilp);
379 dput(dentry);
380 return error;
381}
382
383STATIC int
384xfs_attrlist_by_handle(
385 struct file *parfilp,
386 void __user *arg)
387{
388 int error = -ENOMEM;
389 attrlist_cursor_kern_t *cursor;
390 struct xfs_fsop_attrlist_handlereq __user *p = arg;
391 xfs_fsop_attrlist_handlereq_t al_hreq;
392 struct dentry *dentry;
393 char *kbuf;
394
395 if (!capable(CAP_SYS_ADMIN))
396 return -EPERM;
397 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
398 return -EFAULT;
399 if (al_hreq.buflen < sizeof(struct attrlist) ||
400 al_hreq.buflen > XFS_XATTR_LIST_MAX)
401 return -EINVAL;
402
403 /*
404 * Reject flags, only allow namespaces.
405 */
406 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
407 return -EINVAL;
408
409 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
410 if (IS_ERR(dentry))
411 return PTR_ERR(dentry);
412
413 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
414 if (!kbuf)
415 goto out_dput;
416
417 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
418 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
419 al_hreq.flags, cursor);
420 if (error)
421 goto out_kfree;
422
423 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
424 error = -EFAULT;
425 goto out_kfree;
426 }
427
428 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
429 error = -EFAULT;
430
431out_kfree:
432 kmem_free(kbuf);
433out_dput:
434 dput(dentry);
435 return error;
436}
437
438int
439xfs_attrmulti_attr_get(
440 struct inode *inode,
441 unsigned char *name,
442 unsigned char __user *ubuf,
443 __uint32_t *len,
444 __uint32_t flags)
445{
446 unsigned char *kbuf;
447 int error = -EFAULT;
448
449 if (*len > XFS_XATTR_SIZE_MAX)
450 return -EINVAL;
451 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
452 if (!kbuf)
453 return -ENOMEM;
454
455 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
456 if (error)
457 goto out_kfree;
458
459 if (copy_to_user(ubuf, kbuf, *len))
460 error = -EFAULT;
461
462out_kfree:
463 kmem_free(kbuf);
464 return error;
465}
466
467int
468xfs_attrmulti_attr_set(
469 struct inode *inode,
470 unsigned char *name,
471 const unsigned char __user *ubuf,
472 __uint32_t len,
473 __uint32_t flags)
474{
475 unsigned char *kbuf;
476 int error;
477
478 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
479 return -EPERM;
480 if (len > XFS_XATTR_SIZE_MAX)
481 return -EINVAL;
482
483 kbuf = memdup_user(ubuf, len);
484 if (IS_ERR(kbuf))
485 return PTR_ERR(kbuf);
486
487 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
488 if (!error)
489 xfs_forget_acl(inode, name, flags);
490 kfree(kbuf);
491 return error;
492}
493
494int
495xfs_attrmulti_attr_remove(
496 struct inode *inode,
497 unsigned char *name,
498 __uint32_t flags)
499{
500 int error;
501
502 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
503 return -EPERM;
504 error = xfs_attr_remove(XFS_I(inode), name, flags);
505 if (!error)
506 xfs_forget_acl(inode, name, flags);
507 return error;
508}
509
510STATIC int
511xfs_attrmulti_by_handle(
512 struct file *parfilp,
513 void __user *arg)
514{
515 int error;
516 xfs_attr_multiop_t *ops;
517 xfs_fsop_attrmulti_handlereq_t am_hreq;
518 struct dentry *dentry;
519 unsigned int i, size;
520 unsigned char *attr_name;
521
522 if (!capable(CAP_SYS_ADMIN))
523 return -EPERM;
524 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
525 return -EFAULT;
526
527 /* overflow check */
528 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
529 return -E2BIG;
530
531 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
532 if (IS_ERR(dentry))
533 return PTR_ERR(dentry);
534
535 error = -E2BIG;
536 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
537 if (!size || size > 16 * PAGE_SIZE)
538 goto out_dput;
539
540 ops = memdup_user(am_hreq.ops, size);
541 if (IS_ERR(ops)) {
542 error = PTR_ERR(ops);
543 goto out_dput;
544 }
545
546 error = -ENOMEM;
547 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
548 if (!attr_name)
549 goto out_kfree_ops;
550
551 error = 0;
552 for (i = 0; i < am_hreq.opcount; i++) {
553 ops[i].am_error = strncpy_from_user((char *)attr_name,
554 ops[i].am_attrname, MAXNAMELEN);
555 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
556 error = -ERANGE;
557 if (ops[i].am_error < 0)
558 break;
559
560 switch (ops[i].am_opcode) {
561 case ATTR_OP_GET:
562 ops[i].am_error = xfs_attrmulti_attr_get(
563 d_inode(dentry), attr_name,
564 ops[i].am_attrvalue, &ops[i].am_length,
565 ops[i].am_flags);
566 break;
567 case ATTR_OP_SET:
568 ops[i].am_error = mnt_want_write_file(parfilp);
569 if (ops[i].am_error)
570 break;
571 ops[i].am_error = xfs_attrmulti_attr_set(
572 d_inode(dentry), attr_name,
573 ops[i].am_attrvalue, ops[i].am_length,
574 ops[i].am_flags);
575 mnt_drop_write_file(parfilp);
576 break;
577 case ATTR_OP_REMOVE:
578 ops[i].am_error = mnt_want_write_file(parfilp);
579 if (ops[i].am_error)
580 break;
581 ops[i].am_error = xfs_attrmulti_attr_remove(
582 d_inode(dentry), attr_name,
583 ops[i].am_flags);
584 mnt_drop_write_file(parfilp);
585 break;
586 default:
587 ops[i].am_error = -EINVAL;
588 }
589 }
590
591 if (copy_to_user(am_hreq.ops, ops, size))
592 error = -EFAULT;
593
594 kfree(attr_name);
595 out_kfree_ops:
596 kfree(ops);
597 out_dput:
598 dput(dentry);
599 return error;
600}
601
602int
603xfs_ioc_space(
604 struct file *filp,
605 unsigned int cmd,
606 xfs_flock64_t *bf)
607{
608 struct inode *inode = file_inode(filp);
609 struct xfs_inode *ip = XFS_I(inode);
610 struct iattr iattr;
611 enum xfs_prealloc_flags flags = 0;
612 uint iolock = XFS_IOLOCK_EXCL;
613 int error;
614
615 /*
616 * Only allow the sys admin to reserve space unless
617 * unwritten extents are enabled.
618 */
619 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
620 !capable(CAP_SYS_ADMIN))
621 return -EPERM;
622
623 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
624 return -EPERM;
625
626 if (!(filp->f_mode & FMODE_WRITE))
627 return -EBADF;
628
629 if (!S_ISREG(inode->i_mode))
630 return -EINVAL;
631
632 if (filp->f_flags & O_DSYNC)
633 flags |= XFS_PREALLOC_SYNC;
634 if (filp->f_mode & FMODE_NOCMTIME)
635 flags |= XFS_PREALLOC_INVISIBLE;
636
637 error = mnt_want_write_file(filp);
638 if (error)
639 return error;
640
641 xfs_ilock(ip, iolock);
642 error = xfs_break_layouts(inode, &iolock);
643 if (error)
644 goto out_unlock;
645
646 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
647 iolock |= XFS_MMAPLOCK_EXCL;
648
649 switch (bf->l_whence) {
650 case 0: /*SEEK_SET*/
651 break;
652 case 1: /*SEEK_CUR*/
653 bf->l_start += filp->f_pos;
654 break;
655 case 2: /*SEEK_END*/
656 bf->l_start += XFS_ISIZE(ip);
657 break;
658 default:
659 error = -EINVAL;
660 goto out_unlock;
661 }
662
663 /*
664 * length of <= 0 for resv/unresv/zero is invalid. length for
665 * alloc/free is ignored completely and we have no idea what userspace
666 * might have set it to, so set it to zero to allow range
667 * checks to pass.
668 */
669 switch (cmd) {
670 case XFS_IOC_ZERO_RANGE:
671 case XFS_IOC_RESVSP:
672 case XFS_IOC_RESVSP64:
673 case XFS_IOC_UNRESVSP:
674 case XFS_IOC_UNRESVSP64:
675 if (bf->l_len <= 0) {
676 error = -EINVAL;
677 goto out_unlock;
678 }
679 break;
680 default:
681 bf->l_len = 0;
682 break;
683 }
684
685 if (bf->l_start < 0 ||
686 bf->l_start > inode->i_sb->s_maxbytes ||
687 bf->l_start + bf->l_len < 0 ||
688 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
689 error = -EINVAL;
690 goto out_unlock;
691 }
692
693 switch (cmd) {
694 case XFS_IOC_ZERO_RANGE:
695 flags |= XFS_PREALLOC_SET;
696 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
697 break;
698 case XFS_IOC_RESVSP:
699 case XFS_IOC_RESVSP64:
700 flags |= XFS_PREALLOC_SET;
701 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
702 XFS_BMAPI_PREALLOC);
703 break;
704 case XFS_IOC_UNRESVSP:
705 case XFS_IOC_UNRESVSP64:
706 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
707 break;
708 case XFS_IOC_ALLOCSP:
709 case XFS_IOC_ALLOCSP64:
710 case XFS_IOC_FREESP:
711 case XFS_IOC_FREESP64:
712 flags |= XFS_PREALLOC_CLEAR;
713 if (bf->l_start > XFS_ISIZE(ip)) {
714 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
715 bf->l_start - XFS_ISIZE(ip), 0);
716 if (error)
717 goto out_unlock;
718 }
719
720 iattr.ia_valid = ATTR_SIZE;
721 iattr.ia_size = bf->l_start;
722
723 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
724 break;
725 default:
726 ASSERT(0);
727 error = -EINVAL;
728 }
729
730 if (error)
731 goto out_unlock;
732
733 error = xfs_update_prealloc_flags(ip, flags);
734
735out_unlock:
736 xfs_iunlock(ip, iolock);
737 mnt_drop_write_file(filp);
738 return error;
739}
740
741STATIC int
742xfs_ioc_bulkstat(
743 xfs_mount_t *mp,
744 unsigned int cmd,
745 void __user *arg)
746{
747 xfs_fsop_bulkreq_t bulkreq;
748 int count; /* # of records returned */
749 xfs_ino_t inlast; /* last inode number */
750 int done;
751 int error;
752
753 /* done = 1 if there are more stats to get and if bulkstat */
754 /* should be called again (unused here, but used in dmapi) */
755
756 if (!capable(CAP_SYS_ADMIN))
757 return -EPERM;
758
759 if (XFS_FORCED_SHUTDOWN(mp))
760 return -EIO;
761
762 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
763 return -EFAULT;
764
765 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
766 return -EFAULT;
767
768 if ((count = bulkreq.icount) <= 0)
769 return -EINVAL;
770
771 if (bulkreq.ubuffer == NULL)
772 return -EINVAL;
773
774 if (cmd == XFS_IOC_FSINUMBERS)
775 error = xfs_inumbers(mp, &inlast, &count,
776 bulkreq.ubuffer, xfs_inumbers_fmt);
777 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
778 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
779 sizeof(xfs_bstat_t), NULL, &done);
780 else /* XFS_IOC_FSBULKSTAT */
781 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
782 sizeof(xfs_bstat_t), bulkreq.ubuffer,
783 &done);
784
785 if (error)
786 return error;
787
788 if (bulkreq.ocount != NULL) {
789 if (copy_to_user(bulkreq.lastip, &inlast,
790 sizeof(xfs_ino_t)))
791 return -EFAULT;
792
793 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
794 return -EFAULT;
795 }
796
797 return 0;
798}
799
800STATIC int
801xfs_ioc_fsgeometry_v1(
802 xfs_mount_t *mp,
803 void __user *arg)
804{
805 xfs_fsop_geom_t fsgeo;
806 int error;
807
808 error = xfs_fs_geometry(mp, &fsgeo, 3);
809 if (error)
810 return error;
811
812 /*
813 * Caller should have passed an argument of type
814 * xfs_fsop_geom_v1_t. This is a proper subset of the
815 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
816 */
817 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
818 return -EFAULT;
819 return 0;
820}
821
822STATIC int
823xfs_ioc_fsgeometry(
824 xfs_mount_t *mp,
825 void __user *arg)
826{
827 xfs_fsop_geom_t fsgeo;
828 int error;
829
830 error = xfs_fs_geometry(mp, &fsgeo, 4);
831 if (error)
832 return error;
833
834 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
835 return -EFAULT;
836 return 0;
837}
838
839/*
840 * Linux extended inode flags interface.
841 */
842
843STATIC unsigned int
844xfs_merge_ioc_xflags(
845 unsigned int flags,
846 unsigned int start)
847{
848 unsigned int xflags = start;
849
850 if (flags & FS_IMMUTABLE_FL)
851 xflags |= FS_XFLAG_IMMUTABLE;
852 else
853 xflags &= ~FS_XFLAG_IMMUTABLE;
854 if (flags & FS_APPEND_FL)
855 xflags |= FS_XFLAG_APPEND;
856 else
857 xflags &= ~FS_XFLAG_APPEND;
858 if (flags & FS_SYNC_FL)
859 xflags |= FS_XFLAG_SYNC;
860 else
861 xflags &= ~FS_XFLAG_SYNC;
862 if (flags & FS_NOATIME_FL)
863 xflags |= FS_XFLAG_NOATIME;
864 else
865 xflags &= ~FS_XFLAG_NOATIME;
866 if (flags & FS_NODUMP_FL)
867 xflags |= FS_XFLAG_NODUMP;
868 else
869 xflags &= ~FS_XFLAG_NODUMP;
870
871 return xflags;
872}
873
874STATIC unsigned int
875xfs_di2lxflags(
876 __uint16_t di_flags)
877{
878 unsigned int flags = 0;
879
880 if (di_flags & XFS_DIFLAG_IMMUTABLE)
881 flags |= FS_IMMUTABLE_FL;
882 if (di_flags & XFS_DIFLAG_APPEND)
883 flags |= FS_APPEND_FL;
884 if (di_flags & XFS_DIFLAG_SYNC)
885 flags |= FS_SYNC_FL;
886 if (di_flags & XFS_DIFLAG_NOATIME)
887 flags |= FS_NOATIME_FL;
888 if (di_flags & XFS_DIFLAG_NODUMP)
889 flags |= FS_NODUMP_FL;
890 return flags;
891}
892
893STATIC int
894xfs_ioc_fsgetxattr(
895 xfs_inode_t *ip,
896 int attr,
897 void __user *arg)
898{
899 struct fsxattr fa;
900
901 memset(&fa, 0, sizeof(struct fsxattr));
902
903 xfs_ilock(ip, XFS_ILOCK_SHARED);
904 fa.fsx_xflags = xfs_ip2xflags(ip);
905 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
906 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
907 ip->i_mount->m_sb.sb_blocklog;
908 fa.fsx_projid = xfs_get_projid(ip);
909
910 if (attr) {
911 if (ip->i_afp) {
912 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
913 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
914 else
915 fa.fsx_nextents = ip->i_d.di_anextents;
916 } else
917 fa.fsx_nextents = 0;
918 } else {
919 if (ip->i_df.if_flags & XFS_IFEXTENTS)
920 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
921 else
922 fa.fsx_nextents = ip->i_d.di_nextents;
923 }
924 xfs_iunlock(ip, XFS_ILOCK_SHARED);
925
926 if (copy_to_user(arg, &fa, sizeof(fa)))
927 return -EFAULT;
928 return 0;
929}
930
931STATIC void
932xfs_set_diflags(
933 struct xfs_inode *ip,
934 unsigned int xflags)
935{
936 unsigned int di_flags;
937 uint64_t di_flags2;
938
939 /* can't set PREALLOC this way, just preserve it */
940 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
941 if (xflags & FS_XFLAG_IMMUTABLE)
942 di_flags |= XFS_DIFLAG_IMMUTABLE;
943 if (xflags & FS_XFLAG_APPEND)
944 di_flags |= XFS_DIFLAG_APPEND;
945 if (xflags & FS_XFLAG_SYNC)
946 di_flags |= XFS_DIFLAG_SYNC;
947 if (xflags & FS_XFLAG_NOATIME)
948 di_flags |= XFS_DIFLAG_NOATIME;
949 if (xflags & FS_XFLAG_NODUMP)
950 di_flags |= XFS_DIFLAG_NODUMP;
951 if (xflags & FS_XFLAG_NODEFRAG)
952 di_flags |= XFS_DIFLAG_NODEFRAG;
953 if (xflags & FS_XFLAG_FILESTREAM)
954 di_flags |= XFS_DIFLAG_FILESTREAM;
955 if (S_ISDIR(VFS_I(ip)->i_mode)) {
956 if (xflags & FS_XFLAG_RTINHERIT)
957 di_flags |= XFS_DIFLAG_RTINHERIT;
958 if (xflags & FS_XFLAG_NOSYMLINKS)
959 di_flags |= XFS_DIFLAG_NOSYMLINKS;
960 if (xflags & FS_XFLAG_EXTSZINHERIT)
961 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
962 if (xflags & FS_XFLAG_PROJINHERIT)
963 di_flags |= XFS_DIFLAG_PROJINHERIT;
964 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
965 if (xflags & FS_XFLAG_REALTIME)
966 di_flags |= XFS_DIFLAG_REALTIME;
967 if (xflags & FS_XFLAG_EXTSIZE)
968 di_flags |= XFS_DIFLAG_EXTSIZE;
969 }
970 ip->i_d.di_flags = di_flags;
971
972 /* diflags2 only valid for v3 inodes. */
973 if (ip->i_d.di_version < 3)
974 return;
975
976 di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
977 if (xflags & FS_XFLAG_DAX)
978 di_flags2 |= XFS_DIFLAG2_DAX;
979 if (xflags & FS_XFLAG_COWEXTSIZE)
980 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
981
982 ip->i_d.di_flags2 = di_flags2;
983}
984
985STATIC void
986xfs_diflags_to_linux(
987 struct xfs_inode *ip)
988{
989 struct inode *inode = VFS_I(ip);
990 unsigned int xflags = xfs_ip2xflags(ip);
991
992 if (xflags & FS_XFLAG_IMMUTABLE)
993 inode->i_flags |= S_IMMUTABLE;
994 else
995 inode->i_flags &= ~S_IMMUTABLE;
996 if (xflags & FS_XFLAG_APPEND)
997 inode->i_flags |= S_APPEND;
998 else
999 inode->i_flags &= ~S_APPEND;
1000 if (xflags & FS_XFLAG_SYNC)
1001 inode->i_flags |= S_SYNC;
1002 else
1003 inode->i_flags &= ~S_SYNC;
1004 if (xflags & FS_XFLAG_NOATIME)
1005 inode->i_flags |= S_NOATIME;
1006 else
1007 inode->i_flags &= ~S_NOATIME;
1008 if (xflags & FS_XFLAG_DAX)
1009 inode->i_flags |= S_DAX;
1010 else
1011 inode->i_flags &= ~S_DAX;
1012
1013}
1014
1015static int
1016xfs_ioctl_setattr_xflags(
1017 struct xfs_trans *tp,
1018 struct xfs_inode *ip,
1019 struct fsxattr *fa)
1020{
1021 struct xfs_mount *mp = ip->i_mount;
1022
1023 /* Can't change realtime flag if any extents are allocated. */
1024 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1025 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1026 return -EINVAL;
1027
1028 /* If realtime flag is set then must have realtime device */
1029 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1030 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1031 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1032 return -EINVAL;
1033 }
1034
1035 /* Clear reflink if we are actually able to set the rt flag. */
1036 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1037 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1038
1039 /* Don't allow us to set DAX mode for a reflinked file for now. */
1040 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1041 return -EINVAL;
1042
1043 /*
1044 * Can't modify an immutable/append-only file unless
1045 * we have appropriate permission.
1046 */
1047 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1048 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1049 !capable(CAP_LINUX_IMMUTABLE))
1050 return -EPERM;
1051
1052 xfs_set_diflags(ip, fa->fsx_xflags);
1053 xfs_diflags_to_linux(ip);
1054 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1055 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1056 XFS_STATS_INC(mp, xs_ig_attrchg);
1057 return 0;
1058}
1059
1060/*
1061 * If we are changing DAX flags, we have to ensure the file is clean and any
1062 * cached objects in the address space are invalidated and removed. This
1063 * requires us to lock out other IO and page faults similar to a truncate
1064 * operation. The locks need to be held until the transaction has been committed
1065 * so that the cache invalidation is atomic with respect to the DAX flag
1066 * manipulation.
1067 */
1068static int
1069xfs_ioctl_setattr_dax_invalidate(
1070 struct xfs_inode *ip,
1071 struct fsxattr *fa,
1072 int *join_flags)
1073{
1074 struct inode *inode = VFS_I(ip);
1075 int error;
1076
1077 *join_flags = 0;
1078
1079 /*
1080 * It is only valid to set the DAX flag on regular files and
1081 * directories on filesystems where the block size is equal to the page
1082 * size. On directories it serves as an inherit hint.
1083 */
1084 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1085 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1086 return -EINVAL;
1087 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1088 return -EINVAL;
1089 }
1090
1091 /* If the DAX state is not changing, we have nothing to do here. */
1092 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1093 return 0;
1094 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1095 return 0;
1096
1097 /* lock, flush and invalidate mapping in preparation for flag change */
1098 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1099 error = filemap_write_and_wait(inode->i_mapping);
1100 if (error)
1101 goto out_unlock;
1102 error = invalidate_inode_pages2(inode->i_mapping);
1103 if (error)
1104 goto out_unlock;
1105
1106 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1107 return 0;
1108
1109out_unlock:
1110 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1111 return error;
1112
1113}
1114
1115/*
1116 * Set up the transaction structure for the setattr operation, checking that we
1117 * have permission to do so. On success, return a clean transaction and the
1118 * inode locked exclusively ready for further operation specific checks. On
1119 * failure, return an error without modifying or locking the inode.
1120 *
1121 * The inode might already be IO locked on call. If this is the case, it is
1122 * indicated in @join_flags and we take full responsibility for ensuring they
1123 * are unlocked from now on. Hence if we have an error here, we still have to
1124 * unlock them. Otherwise, once they are joined to the transaction, they will
1125 * be unlocked on commit/cancel.
1126 */
1127static struct xfs_trans *
1128xfs_ioctl_setattr_get_trans(
1129 struct xfs_inode *ip,
1130 int join_flags)
1131{
1132 struct xfs_mount *mp = ip->i_mount;
1133 struct xfs_trans *tp;
1134 int error = -EROFS;
1135
1136 if (mp->m_flags & XFS_MOUNT_RDONLY)
1137 goto out_unlock;
1138 error = -EIO;
1139 if (XFS_FORCED_SHUTDOWN(mp))
1140 goto out_unlock;
1141
1142 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1143 if (error)
1144 return ERR_PTR(error);
1145
1146 xfs_ilock(ip, XFS_ILOCK_EXCL);
1147 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1148 join_flags = 0;
1149
1150 /*
1151 * CAP_FOWNER overrides the following restrictions:
1152 *
1153 * The user ID of the calling process must be equal to the file owner
1154 * ID, except in cases where the CAP_FSETID capability is applicable.
1155 */
1156 if (!inode_owner_or_capable(VFS_I(ip))) {
1157 error = -EPERM;
1158 goto out_cancel;
1159 }
1160
1161 if (mp->m_flags & XFS_MOUNT_WSYNC)
1162 xfs_trans_set_sync(tp);
1163
1164 return tp;
1165
1166out_cancel:
1167 xfs_trans_cancel(tp);
1168out_unlock:
1169 if (join_flags)
1170 xfs_iunlock(ip, join_flags);
1171 return ERR_PTR(error);
1172}
1173
1174/*
1175 * extent size hint validation is somewhat cumbersome. Rules are:
1176 *
1177 * 1. extent size hint is only valid for directories and regular files
1178 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1179 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1180 * 4. can only be changed on regular files if no extents are allocated
1181 * 5. can be changed on directories at any time
1182 * 6. extsize hint of 0 turns off hints, clears inode flags.
1183 * 7. Extent size must be a multiple of the appropriate block size.
1184 * 8. for non-realtime files, the extent size hint must be limited
1185 * to half the AG size to avoid alignment extending the extent beyond the
1186 * limits of the AG.
1187 */
1188static int
1189xfs_ioctl_setattr_check_extsize(
1190 struct xfs_inode *ip,
1191 struct fsxattr *fa)
1192{
1193 struct xfs_mount *mp = ip->i_mount;
1194
1195 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1196 return -EINVAL;
1197
1198 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1199 !S_ISDIR(VFS_I(ip)->i_mode))
1200 return -EINVAL;
1201
1202 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1203 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1204 return -EINVAL;
1205
1206 if (fa->fsx_extsize != 0) {
1207 xfs_extlen_t size;
1208 xfs_fsblock_t extsize_fsb;
1209
1210 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1211 if (extsize_fsb > MAXEXTLEN)
1212 return -EINVAL;
1213
1214 if (XFS_IS_REALTIME_INODE(ip) ||
1215 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1216 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1217 } else {
1218 size = mp->m_sb.sb_blocksize;
1219 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1220 return -EINVAL;
1221 }
1222
1223 if (fa->fsx_extsize % size)
1224 return -EINVAL;
1225 } else
1226 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1227
1228 return 0;
1229}
1230
1231/*
1232 * CoW extent size hint validation rules are:
1233 *
1234 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1235 * The inode does not have to have any shared blocks, but it must be a v3.
1236 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1237 * for a directory, the hint is propagated to new files.
1238 * 3. Can be changed on files & directories at any time.
1239 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1240 * 5. Extent size must be a multiple of the appropriate block size.
1241 * 6. The extent size hint must be limited to half the AG size to avoid
1242 * alignment extending the extent beyond the limits of the AG.
1243 */
1244static int
1245xfs_ioctl_setattr_check_cowextsize(
1246 struct xfs_inode *ip,
1247 struct fsxattr *fa)
1248{
1249 struct xfs_mount *mp = ip->i_mount;
1250
1251 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1252 return 0;
1253
1254 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1255 ip->i_d.di_version != 3)
1256 return -EINVAL;
1257
1258 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1259 return -EINVAL;
1260
1261 if (fa->fsx_cowextsize != 0) {
1262 xfs_extlen_t size;
1263 xfs_fsblock_t cowextsize_fsb;
1264
1265 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1266 if (cowextsize_fsb > MAXEXTLEN)
1267 return -EINVAL;
1268
1269 size = mp->m_sb.sb_blocksize;
1270 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1271 return -EINVAL;
1272
1273 if (fa->fsx_cowextsize % size)
1274 return -EINVAL;
1275 } else
1276 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1277
1278 return 0;
1279}
1280
1281static int
1282xfs_ioctl_setattr_check_projid(
1283 struct xfs_inode *ip,
1284 struct fsxattr *fa)
1285{
1286 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1287 if (fa->fsx_projid > (__uint16_t)-1 &&
1288 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1289 return -EINVAL;
1290
1291 /*
1292 * Project Quota ID state is only allowed to change from within the init
1293 * namespace. Enforce that restriction only if we are trying to change
1294 * the quota ID state. Everything else is allowed in user namespaces.
1295 */
1296 if (current_user_ns() == &init_user_ns)
1297 return 0;
1298
1299 if (xfs_get_projid(ip) != fa->fsx_projid)
1300 return -EINVAL;
1301 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1302 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1303 return -EINVAL;
1304
1305 return 0;
1306}
1307
1308STATIC int
1309xfs_ioctl_setattr(
1310 xfs_inode_t *ip,
1311 struct fsxattr *fa)
1312{
1313 struct xfs_mount *mp = ip->i_mount;
1314 struct xfs_trans *tp;
1315 struct xfs_dquot *udqp = NULL;
1316 struct xfs_dquot *pdqp = NULL;
1317 struct xfs_dquot *olddquot = NULL;
1318 int code;
1319 int join_flags = 0;
1320
1321 trace_xfs_ioctl_setattr(ip);
1322
1323 code = xfs_ioctl_setattr_check_projid(ip, fa);
1324 if (code)
1325 return code;
1326
1327 /*
1328 * If disk quotas is on, we make sure that the dquots do exist on disk,
1329 * before we start any other transactions. Trying to do this later
1330 * is messy. We don't care to take a readlock to look at the ids
1331 * in inode here, because we can't hold it across the trans_reserve.
1332 * If the IDs do change before we take the ilock, we're covered
1333 * because the i_*dquot fields will get updated anyway.
1334 */
1335 if (XFS_IS_QUOTA_ON(mp)) {
1336 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1337 ip->i_d.di_gid, fa->fsx_projid,
1338 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1339 if (code)
1340 return code;
1341 }
1342
1343 /*
1344 * Changing DAX config may require inode locking for mapping
1345 * invalidation. These need to be held all the way to transaction commit
1346 * or cancel time, so need to be passed through to
1347 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1348 * appropriately.
1349 */
1350 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1351 if (code)
1352 goto error_free_dquots;
1353
1354 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1355 if (IS_ERR(tp)) {
1356 code = PTR_ERR(tp);
1357 goto error_free_dquots;
1358 }
1359
1360
1361 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1362 xfs_get_projid(ip) != fa->fsx_projid) {
1363 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1364 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1365 if (code) /* out of quota */
1366 goto error_trans_cancel;
1367 }
1368
1369 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1370 if (code)
1371 goto error_trans_cancel;
1372
1373 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1374 if (code)
1375 goto error_trans_cancel;
1376
1377 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1378 if (code)
1379 goto error_trans_cancel;
1380
1381 /*
1382 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1383 * overrides the following restrictions:
1384 *
1385 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1386 * successful return from chown()
1387 */
1388
1389 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1390 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1391 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1392
1393 /* Change the ownerships and register project quota modifications */
1394 if (xfs_get_projid(ip) != fa->fsx_projid) {
1395 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1396 olddquot = xfs_qm_vop_chown(tp, ip,
1397 &ip->i_pdquot, pdqp);
1398 }
1399 ASSERT(ip->i_d.di_version > 1);
1400 xfs_set_projid(ip, fa->fsx_projid);
1401 }
1402
1403 /*
1404 * Only set the extent size hint if we've already determined that the
1405 * extent size hint should be set on the inode. If no extent size flags
1406 * are set on the inode then unconditionally clear the extent size hint.
1407 */
1408 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1409 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1410 else
1411 ip->i_d.di_extsize = 0;
1412 if (ip->i_d.di_version == 3 &&
1413 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1414 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1415 mp->m_sb.sb_blocklog;
1416 else
1417 ip->i_d.di_cowextsize = 0;
1418
1419 code = xfs_trans_commit(tp);
1420
1421 /*
1422 * Release any dquot(s) the inode had kept before chown.
1423 */
1424 xfs_qm_dqrele(olddquot);
1425 xfs_qm_dqrele(udqp);
1426 xfs_qm_dqrele(pdqp);
1427
1428 return code;
1429
1430error_trans_cancel:
1431 xfs_trans_cancel(tp);
1432error_free_dquots:
1433 xfs_qm_dqrele(udqp);
1434 xfs_qm_dqrele(pdqp);
1435 return code;
1436}
1437
1438STATIC int
1439xfs_ioc_fssetxattr(
1440 xfs_inode_t *ip,
1441 struct file *filp,
1442 void __user *arg)
1443{
1444 struct fsxattr fa;
1445 int error;
1446
1447 if (copy_from_user(&fa, arg, sizeof(fa)))
1448 return -EFAULT;
1449
1450 error = mnt_want_write_file(filp);
1451 if (error)
1452 return error;
1453 error = xfs_ioctl_setattr(ip, &fa);
1454 mnt_drop_write_file(filp);
1455 return error;
1456}
1457
1458STATIC int
1459xfs_ioc_getxflags(
1460 xfs_inode_t *ip,
1461 void __user *arg)
1462{
1463 unsigned int flags;
1464
1465 flags = xfs_di2lxflags(ip->i_d.di_flags);
1466 if (copy_to_user(arg, &flags, sizeof(flags)))
1467 return -EFAULT;
1468 return 0;
1469}
1470
1471STATIC int
1472xfs_ioc_setxflags(
1473 struct xfs_inode *ip,
1474 struct file *filp,
1475 void __user *arg)
1476{
1477 struct xfs_trans *tp;
1478 struct fsxattr fa;
1479 unsigned int flags;
1480 int join_flags = 0;
1481 int error;
1482
1483 if (copy_from_user(&flags, arg, sizeof(flags)))
1484 return -EFAULT;
1485
1486 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1487 FS_NOATIME_FL | FS_NODUMP_FL | \
1488 FS_SYNC_FL))
1489 return -EOPNOTSUPP;
1490
1491 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1492
1493 error = mnt_want_write_file(filp);
1494 if (error)
1495 return error;
1496
1497 /*
1498 * Changing DAX config may require inode locking for mapping
1499 * invalidation. These need to be held all the way to transaction commit
1500 * or cancel time, so need to be passed through to
1501 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1502 * appropriately.
1503 */
1504 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1505 if (error)
1506 goto out_drop_write;
1507
1508 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1509 if (IS_ERR(tp)) {
1510 error = PTR_ERR(tp);
1511 goto out_drop_write;
1512 }
1513
1514 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1515 if (error) {
1516 xfs_trans_cancel(tp);
1517 goto out_drop_write;
1518 }
1519
1520 error = xfs_trans_commit(tp);
1521out_drop_write:
1522 mnt_drop_write_file(filp);
1523 return error;
1524}
1525
1526STATIC int
1527xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1528{
1529 struct getbmap __user *base = (struct getbmap __user *)*ap;
1530
1531 /* copy only getbmap portion (not getbmapx) */
1532 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1533 return -EFAULT;
1534
1535 *ap += sizeof(struct getbmap);
1536 return 0;
1537}
1538
1539STATIC int
1540xfs_ioc_getbmap(
1541 struct file *file,
1542 unsigned int cmd,
1543 void __user *arg)
1544{
1545 struct getbmapx bmx;
1546 int error;
1547
1548 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1549 return -EFAULT;
1550
1551 if (bmx.bmv_count < 2)
1552 return -EINVAL;
1553
1554 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1555 if (file->f_mode & FMODE_NOCMTIME)
1556 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1557
1558 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
1559 (__force struct getbmap *)arg+1);
1560 if (error)
1561 return error;
1562
1563 /* copy back header - only size of getbmap */
1564 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1565 return -EFAULT;
1566 return 0;
1567}
1568
1569STATIC int
1570xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1571{
1572 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1573
1574 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1575 return -EFAULT;
1576
1577 *ap += sizeof(struct getbmapx);
1578 return 0;
1579}
1580
1581STATIC int
1582xfs_ioc_getbmapx(
1583 struct xfs_inode *ip,
1584 void __user *arg)
1585{
1586 struct getbmapx bmx;
1587 int error;
1588
1589 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1590 return -EFAULT;
1591
1592 if (bmx.bmv_count < 2)
1593 return -EINVAL;
1594
1595 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1596 return -EINVAL;
1597
1598 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1599 (__force struct getbmapx *)arg+1);
1600 if (error)
1601 return error;
1602
1603 /* copy back header */
1604 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1605 return -EFAULT;
1606
1607 return 0;
1608}
1609
1610int
1611xfs_ioc_swapext(
1612 xfs_swapext_t *sxp)
1613{
1614 xfs_inode_t *ip, *tip;
1615 struct fd f, tmp;
1616 int error = 0;
1617
1618 /* Pull information for the target fd */
1619 f = fdget((int)sxp->sx_fdtarget);
1620 if (!f.file) {
1621 error = -EINVAL;
1622 goto out;
1623 }
1624
1625 if (!(f.file->f_mode & FMODE_WRITE) ||
1626 !(f.file->f_mode & FMODE_READ) ||
1627 (f.file->f_flags & O_APPEND)) {
1628 error = -EBADF;
1629 goto out_put_file;
1630 }
1631
1632 tmp = fdget((int)sxp->sx_fdtmp);
1633 if (!tmp.file) {
1634 error = -EINVAL;
1635 goto out_put_file;
1636 }
1637
1638 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1639 !(tmp.file->f_mode & FMODE_READ) ||
1640 (tmp.file->f_flags & O_APPEND)) {
1641 error = -EBADF;
1642 goto out_put_tmp_file;
1643 }
1644
1645 if (IS_SWAPFILE(file_inode(f.file)) ||
1646 IS_SWAPFILE(file_inode(tmp.file))) {
1647 error = -EINVAL;
1648 goto out_put_tmp_file;
1649 }
1650
1651 /*
1652 * We need to ensure that the fds passed in point to XFS inodes
1653 * before we cast and access them as XFS structures as we have no
1654 * control over what the user passes us here.
1655 */
1656 if (f.file->f_op != &xfs_file_operations ||
1657 tmp.file->f_op != &xfs_file_operations) {
1658 error = -EINVAL;
1659 goto out_put_tmp_file;
1660 }
1661
1662 ip = XFS_I(file_inode(f.file));
1663 tip = XFS_I(file_inode(tmp.file));
1664
1665 if (ip->i_mount != tip->i_mount) {
1666 error = -EINVAL;
1667 goto out_put_tmp_file;
1668 }
1669
1670 if (ip->i_ino == tip->i_ino) {
1671 error = -EINVAL;
1672 goto out_put_tmp_file;
1673 }
1674
1675 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1676 error = -EIO;
1677 goto out_put_tmp_file;
1678 }
1679
1680 error = xfs_swap_extents(ip, tip, sxp);
1681
1682 out_put_tmp_file:
1683 fdput(tmp);
1684 out_put_file:
1685 fdput(f);
1686 out:
1687 return error;
1688}
1689
1690/*
1691 * Note: some of the ioctl's return positive numbers as a
1692 * byte count indicating success, such as readlink_by_handle.
1693 * So we don't "sign flip" like most other routines. This means
1694 * true errors need to be returned as a negative value.
1695 */
1696long
1697xfs_file_ioctl(
1698 struct file *filp,
1699 unsigned int cmd,
1700 unsigned long p)
1701{
1702 struct inode *inode = file_inode(filp);
1703 struct xfs_inode *ip = XFS_I(inode);
1704 struct xfs_mount *mp = ip->i_mount;
1705 void __user *arg = (void __user *)p;
1706 int error;
1707
1708 trace_xfs_file_ioctl(ip);
1709
1710 switch (cmd) {
1711 case FITRIM:
1712 return xfs_ioc_trim(mp, arg);
1713 case XFS_IOC_ALLOCSP:
1714 case XFS_IOC_FREESP:
1715 case XFS_IOC_RESVSP:
1716 case XFS_IOC_UNRESVSP:
1717 case XFS_IOC_ALLOCSP64:
1718 case XFS_IOC_FREESP64:
1719 case XFS_IOC_RESVSP64:
1720 case XFS_IOC_UNRESVSP64:
1721 case XFS_IOC_ZERO_RANGE: {
1722 xfs_flock64_t bf;
1723
1724 if (copy_from_user(&bf, arg, sizeof(bf)))
1725 return -EFAULT;
1726 return xfs_ioc_space(filp, cmd, &bf);
1727 }
1728 case XFS_IOC_DIOINFO: {
1729 struct dioattr da;
1730 xfs_buftarg_t *target =
1731 XFS_IS_REALTIME_INODE(ip) ?
1732 mp->m_rtdev_targp : mp->m_ddev_targp;
1733
1734 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1735 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1736
1737 if (copy_to_user(arg, &da, sizeof(da)))
1738 return -EFAULT;
1739 return 0;
1740 }
1741
1742 case XFS_IOC_FSBULKSTAT_SINGLE:
1743 case XFS_IOC_FSBULKSTAT:
1744 case XFS_IOC_FSINUMBERS:
1745 return xfs_ioc_bulkstat(mp, cmd, arg);
1746
1747 case XFS_IOC_FSGEOMETRY_V1:
1748 return xfs_ioc_fsgeometry_v1(mp, arg);
1749
1750 case XFS_IOC_FSGEOMETRY:
1751 return xfs_ioc_fsgeometry(mp, arg);
1752
1753 case XFS_IOC_GETVERSION:
1754 return put_user(inode->i_generation, (int __user *)arg);
1755
1756 case XFS_IOC_FSGETXATTR:
1757 return xfs_ioc_fsgetxattr(ip, 0, arg);
1758 case XFS_IOC_FSGETXATTRA:
1759 return xfs_ioc_fsgetxattr(ip, 1, arg);
1760 case XFS_IOC_FSSETXATTR:
1761 return xfs_ioc_fssetxattr(ip, filp, arg);
1762 case XFS_IOC_GETXFLAGS:
1763 return xfs_ioc_getxflags(ip, arg);
1764 case XFS_IOC_SETXFLAGS:
1765 return xfs_ioc_setxflags(ip, filp, arg);
1766
1767 case XFS_IOC_FSSETDM: {
1768 struct fsdmidata dmi;
1769
1770 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1771 return -EFAULT;
1772
1773 error = mnt_want_write_file(filp);
1774 if (error)
1775 return error;
1776
1777 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1778 dmi.fsd_dmstate);
1779 mnt_drop_write_file(filp);
1780 return error;
1781 }
1782
1783 case XFS_IOC_GETBMAP:
1784 case XFS_IOC_GETBMAPA:
1785 return xfs_ioc_getbmap(filp, cmd, arg);
1786
1787 case XFS_IOC_GETBMAPX:
1788 return xfs_ioc_getbmapx(ip, arg);
1789
1790 case XFS_IOC_FD_TO_HANDLE:
1791 case XFS_IOC_PATH_TO_HANDLE:
1792 case XFS_IOC_PATH_TO_FSHANDLE: {
1793 xfs_fsop_handlereq_t hreq;
1794
1795 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1796 return -EFAULT;
1797 return xfs_find_handle(cmd, &hreq);
1798 }
1799 case XFS_IOC_OPEN_BY_HANDLE: {
1800 xfs_fsop_handlereq_t hreq;
1801
1802 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1803 return -EFAULT;
1804 return xfs_open_by_handle(filp, &hreq);
1805 }
1806 case XFS_IOC_FSSETDM_BY_HANDLE:
1807 return xfs_fssetdm_by_handle(filp, arg);
1808
1809 case XFS_IOC_READLINK_BY_HANDLE: {
1810 xfs_fsop_handlereq_t hreq;
1811
1812 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1813 return -EFAULT;
1814 return xfs_readlink_by_handle(filp, &hreq);
1815 }
1816 case XFS_IOC_ATTRLIST_BY_HANDLE:
1817 return xfs_attrlist_by_handle(filp, arg);
1818
1819 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1820 return xfs_attrmulti_by_handle(filp, arg);
1821
1822 case XFS_IOC_SWAPEXT: {
1823 struct xfs_swapext sxp;
1824
1825 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1826 return -EFAULT;
1827 error = mnt_want_write_file(filp);
1828 if (error)
1829 return error;
1830 error = xfs_ioc_swapext(&sxp);
1831 mnt_drop_write_file(filp);
1832 return error;
1833 }
1834
1835 case XFS_IOC_FSCOUNTS: {
1836 xfs_fsop_counts_t out;
1837
1838 error = xfs_fs_counts(mp, &out);
1839 if (error)
1840 return error;
1841
1842 if (copy_to_user(arg, &out, sizeof(out)))
1843 return -EFAULT;
1844 return 0;
1845 }
1846
1847 case XFS_IOC_SET_RESBLKS: {
1848 xfs_fsop_resblks_t inout;
1849 __uint64_t in;
1850
1851 if (!capable(CAP_SYS_ADMIN))
1852 return -EPERM;
1853
1854 if (mp->m_flags & XFS_MOUNT_RDONLY)
1855 return -EROFS;
1856
1857 if (copy_from_user(&inout, arg, sizeof(inout)))
1858 return -EFAULT;
1859
1860 error = mnt_want_write_file(filp);
1861 if (error)
1862 return error;
1863
1864 /* input parameter is passed in resblks field of structure */
1865 in = inout.resblks;
1866 error = xfs_reserve_blocks(mp, &in, &inout);
1867 mnt_drop_write_file(filp);
1868 if (error)
1869 return error;
1870
1871 if (copy_to_user(arg, &inout, sizeof(inout)))
1872 return -EFAULT;
1873 return 0;
1874 }
1875
1876 case XFS_IOC_GET_RESBLKS: {
1877 xfs_fsop_resblks_t out;
1878
1879 if (!capable(CAP_SYS_ADMIN))
1880 return -EPERM;
1881
1882 error = xfs_reserve_blocks(mp, NULL, &out);
1883 if (error)
1884 return error;
1885
1886 if (copy_to_user(arg, &out, sizeof(out)))
1887 return -EFAULT;
1888
1889 return 0;
1890 }
1891
1892 case XFS_IOC_FSGROWFSDATA: {
1893 xfs_growfs_data_t in;
1894
1895 if (copy_from_user(&in, arg, sizeof(in)))
1896 return -EFAULT;
1897
1898 error = mnt_want_write_file(filp);
1899 if (error)
1900 return error;
1901 error = xfs_growfs_data(mp, &in);
1902 mnt_drop_write_file(filp);
1903 return error;
1904 }
1905
1906 case XFS_IOC_FSGROWFSLOG: {
1907 xfs_growfs_log_t in;
1908
1909 if (copy_from_user(&in, arg, sizeof(in)))
1910 return -EFAULT;
1911
1912 error = mnt_want_write_file(filp);
1913 if (error)
1914 return error;
1915 error = xfs_growfs_log(mp, &in);
1916 mnt_drop_write_file(filp);
1917 return error;
1918 }
1919
1920 case XFS_IOC_FSGROWFSRT: {
1921 xfs_growfs_rt_t in;
1922
1923 if (copy_from_user(&in, arg, sizeof(in)))
1924 return -EFAULT;
1925
1926 error = mnt_want_write_file(filp);
1927 if (error)
1928 return error;
1929 error = xfs_growfs_rt(mp, &in);
1930 mnt_drop_write_file(filp);
1931 return error;
1932 }
1933
1934 case XFS_IOC_GOINGDOWN: {
1935 __uint32_t in;
1936
1937 if (!capable(CAP_SYS_ADMIN))
1938 return -EPERM;
1939
1940 if (get_user(in, (__uint32_t __user *)arg))
1941 return -EFAULT;
1942
1943 return xfs_fs_goingdown(mp, in);
1944 }
1945
1946 case XFS_IOC_ERROR_INJECTION: {
1947 xfs_error_injection_t in;
1948
1949 if (!capable(CAP_SYS_ADMIN))
1950 return -EPERM;
1951
1952 if (copy_from_user(&in, arg, sizeof(in)))
1953 return -EFAULT;
1954
1955 return xfs_errortag_add(in.errtag, mp);
1956 }
1957
1958 case XFS_IOC_ERROR_CLEARALL:
1959 if (!capable(CAP_SYS_ADMIN))
1960 return -EPERM;
1961
1962 return xfs_errortag_clearall(mp, 1);
1963
1964 case XFS_IOC_FREE_EOFBLOCKS: {
1965 struct xfs_fs_eofblocks eofb;
1966 struct xfs_eofblocks keofb;
1967
1968 if (!capable(CAP_SYS_ADMIN))
1969 return -EPERM;
1970
1971 if (mp->m_flags & XFS_MOUNT_RDONLY)
1972 return -EROFS;
1973
1974 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1975 return -EFAULT;
1976
1977 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1978 if (error)
1979 return error;
1980
1981 return xfs_icache_free_eofblocks(mp, &keofb);
1982 }
1983
1984 default:
1985 return -ENOTTY;
1986 }
1987}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_inode.h"
14#include "xfs_rtalloc.h"
15#include "xfs_iwalk.h"
16#include "xfs_itable.h"
17#include "xfs_error.h"
18#include "xfs_attr.h"
19#include "xfs_bmap.h"
20#include "xfs_bmap_util.h"
21#include "xfs_fsops.h"
22#include "xfs_discard.h"
23#include "xfs_quota.h"
24#include "xfs_export.h"
25#include "xfs_trace.h"
26#include "xfs_icache.h"
27#include "xfs_trans.h"
28#include "xfs_acl.h"
29#include "xfs_btree.h"
30#include <linux/fsmap.h>
31#include "xfs_fsmap.h"
32#include "scrub/xfs_scrub.h"
33#include "xfs_sb.h"
34#include "xfs_ag.h"
35#include "xfs_health.h"
36
37#include <linux/mount.h>
38#include <linux/namei.h>
39
40/*
41 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
42 * a file or fs handle.
43 *
44 * XFS_IOC_PATH_TO_FSHANDLE
45 * returns fs handle for a mount point or path within that mount point
46 * XFS_IOC_FD_TO_HANDLE
47 * returns full handle for a FD opened in user space
48 * XFS_IOC_PATH_TO_HANDLE
49 * returns full handle for a path
50 */
51int
52xfs_find_handle(
53 unsigned int cmd,
54 xfs_fsop_handlereq_t *hreq)
55{
56 int hsize;
57 xfs_handle_t handle;
58 struct inode *inode;
59 struct fd f = {NULL};
60 struct path path;
61 int error;
62 struct xfs_inode *ip;
63
64 if (cmd == XFS_IOC_FD_TO_HANDLE) {
65 f = fdget(hreq->fd);
66 if (!f.file)
67 return -EBADF;
68 inode = file_inode(f.file);
69 } else {
70 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
71 if (error)
72 return error;
73 inode = d_inode(path.dentry);
74 }
75 ip = XFS_I(inode);
76
77 /*
78 * We can only generate handles for inodes residing on a XFS filesystem,
79 * and only for regular files, directories or symbolic links.
80 */
81 error = -EINVAL;
82 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
83 goto out_put;
84
85 error = -EBADF;
86 if (!S_ISREG(inode->i_mode) &&
87 !S_ISDIR(inode->i_mode) &&
88 !S_ISLNK(inode->i_mode))
89 goto out_put;
90
91
92 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
93
94 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
95 /*
96 * This handle only contains an fsid, zero the rest.
97 */
98 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
99 hsize = sizeof(xfs_fsid_t);
100 } else {
101 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
102 sizeof(handle.ha_fid.fid_len);
103 handle.ha_fid.fid_pad = 0;
104 handle.ha_fid.fid_gen = inode->i_generation;
105 handle.ha_fid.fid_ino = ip->i_ino;
106 hsize = sizeof(xfs_handle_t);
107 }
108
109 error = -EFAULT;
110 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
111 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
112 goto out_put;
113
114 error = 0;
115
116 out_put:
117 if (cmd == XFS_IOC_FD_TO_HANDLE)
118 fdput(f);
119 else
120 path_put(&path);
121 return error;
122}
123
124/*
125 * No need to do permission checks on the various pathname components
126 * as the handle operations are privileged.
127 */
128STATIC int
129xfs_handle_acceptable(
130 void *context,
131 struct dentry *dentry)
132{
133 return 1;
134}
135
136/*
137 * Convert userspace handle data into a dentry.
138 */
139struct dentry *
140xfs_handle_to_dentry(
141 struct file *parfilp,
142 void __user *uhandle,
143 u32 hlen)
144{
145 xfs_handle_t handle;
146 struct xfs_fid64 fid;
147
148 /*
149 * Only allow handle opens under a directory.
150 */
151 if (!S_ISDIR(file_inode(parfilp)->i_mode))
152 return ERR_PTR(-ENOTDIR);
153
154 if (hlen != sizeof(xfs_handle_t))
155 return ERR_PTR(-EINVAL);
156 if (copy_from_user(&handle, uhandle, hlen))
157 return ERR_PTR(-EFAULT);
158 if (handle.ha_fid.fid_len !=
159 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
160 return ERR_PTR(-EINVAL);
161
162 memset(&fid, 0, sizeof(struct fid));
163 fid.ino = handle.ha_fid.fid_ino;
164 fid.gen = handle.ha_fid.fid_gen;
165
166 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
167 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
168 xfs_handle_acceptable, NULL);
169}
170
171STATIC struct dentry *
172xfs_handlereq_to_dentry(
173 struct file *parfilp,
174 xfs_fsop_handlereq_t *hreq)
175{
176 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
177}
178
179int
180xfs_open_by_handle(
181 struct file *parfilp,
182 xfs_fsop_handlereq_t *hreq)
183{
184 const struct cred *cred = current_cred();
185 int error;
186 int fd;
187 int permflag;
188 struct file *filp;
189 struct inode *inode;
190 struct dentry *dentry;
191 fmode_t fmode;
192 struct path path;
193
194 if (!capable(CAP_SYS_ADMIN))
195 return -EPERM;
196
197 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
198 if (IS_ERR(dentry))
199 return PTR_ERR(dentry);
200 inode = d_inode(dentry);
201
202 /* Restrict xfs_open_by_handle to directories & regular files. */
203 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
204 error = -EPERM;
205 goto out_dput;
206 }
207
208#if BITS_PER_LONG != 32
209 hreq->oflags |= O_LARGEFILE;
210#endif
211
212 permflag = hreq->oflags;
213 fmode = OPEN_FMODE(permflag);
214 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
215 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
216 error = -EPERM;
217 goto out_dput;
218 }
219
220 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
221 error = -EPERM;
222 goto out_dput;
223 }
224
225 /* Can't write directories. */
226 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
227 error = -EISDIR;
228 goto out_dput;
229 }
230
231 fd = get_unused_fd_flags(0);
232 if (fd < 0) {
233 error = fd;
234 goto out_dput;
235 }
236
237 path.mnt = parfilp->f_path.mnt;
238 path.dentry = dentry;
239 filp = dentry_open(&path, hreq->oflags, cred);
240 dput(dentry);
241 if (IS_ERR(filp)) {
242 put_unused_fd(fd);
243 return PTR_ERR(filp);
244 }
245
246 if (S_ISREG(inode->i_mode)) {
247 filp->f_flags |= O_NOATIME;
248 filp->f_mode |= FMODE_NOCMTIME;
249 }
250
251 fd_install(fd, filp);
252 return fd;
253
254 out_dput:
255 dput(dentry);
256 return error;
257}
258
259int
260xfs_readlink_by_handle(
261 struct file *parfilp,
262 xfs_fsop_handlereq_t *hreq)
263{
264 struct dentry *dentry;
265 __u32 olen;
266 int error;
267
268 if (!capable(CAP_SYS_ADMIN))
269 return -EPERM;
270
271 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
272 if (IS_ERR(dentry))
273 return PTR_ERR(dentry);
274
275 /* Restrict this handle operation to symlinks only. */
276 if (!d_is_symlink(dentry)) {
277 error = -EINVAL;
278 goto out_dput;
279 }
280
281 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
282 error = -EFAULT;
283 goto out_dput;
284 }
285
286 error = vfs_readlink(dentry, hreq->ohandle, olen);
287
288 out_dput:
289 dput(dentry);
290 return error;
291}
292
293int
294xfs_set_dmattrs(
295 xfs_inode_t *ip,
296 uint evmask,
297 uint16_t state)
298{
299 xfs_mount_t *mp = ip->i_mount;
300 xfs_trans_t *tp;
301 int error;
302
303 if (!capable(CAP_SYS_ADMIN))
304 return -EPERM;
305
306 if (XFS_FORCED_SHUTDOWN(mp))
307 return -EIO;
308
309 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
310 if (error)
311 return error;
312
313 xfs_ilock(ip, XFS_ILOCK_EXCL);
314 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
315
316 ip->i_d.di_dmevmask = evmask;
317 ip->i_d.di_dmstate = state;
318
319 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
320 error = xfs_trans_commit(tp);
321
322 return error;
323}
324
325STATIC int
326xfs_fssetdm_by_handle(
327 struct file *parfilp,
328 void __user *arg)
329{
330 int error;
331 struct fsdmidata fsd;
332 xfs_fsop_setdm_handlereq_t dmhreq;
333 struct dentry *dentry;
334
335 if (!capable(CAP_MKNOD))
336 return -EPERM;
337 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
338 return -EFAULT;
339
340 error = mnt_want_write_file(parfilp);
341 if (error)
342 return error;
343
344 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
345 if (IS_ERR(dentry)) {
346 mnt_drop_write_file(parfilp);
347 return PTR_ERR(dentry);
348 }
349
350 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
351 error = -EPERM;
352 goto out;
353 }
354
355 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
356 error = -EFAULT;
357 goto out;
358 }
359
360 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
361 fsd.fsd_dmstate);
362
363 out:
364 mnt_drop_write_file(parfilp);
365 dput(dentry);
366 return error;
367}
368
369STATIC int
370xfs_attrlist_by_handle(
371 struct file *parfilp,
372 void __user *arg)
373{
374 int error = -ENOMEM;
375 attrlist_cursor_kern_t *cursor;
376 struct xfs_fsop_attrlist_handlereq __user *p = arg;
377 xfs_fsop_attrlist_handlereq_t al_hreq;
378 struct dentry *dentry;
379 char *kbuf;
380
381 if (!capable(CAP_SYS_ADMIN))
382 return -EPERM;
383 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
384 return -EFAULT;
385 if (al_hreq.buflen < sizeof(struct attrlist) ||
386 al_hreq.buflen > XFS_XATTR_LIST_MAX)
387 return -EINVAL;
388
389 /*
390 * Reject flags, only allow namespaces.
391 */
392 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
393 return -EINVAL;
394
395 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
396 if (IS_ERR(dentry))
397 return PTR_ERR(dentry);
398
399 kbuf = kmem_zalloc_large(al_hreq.buflen, 0);
400 if (!kbuf)
401 goto out_dput;
402
403 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
404 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
405 al_hreq.flags, cursor);
406 if (error)
407 goto out_kfree;
408
409 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
410 error = -EFAULT;
411 goto out_kfree;
412 }
413
414 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
415 error = -EFAULT;
416
417out_kfree:
418 kmem_free(kbuf);
419out_dput:
420 dput(dentry);
421 return error;
422}
423
424int
425xfs_attrmulti_attr_get(
426 struct inode *inode,
427 unsigned char *name,
428 unsigned char __user *ubuf,
429 uint32_t *len,
430 uint32_t flags)
431{
432 unsigned char *kbuf;
433 int error = -EFAULT;
434
435 if (*len > XFS_XATTR_SIZE_MAX)
436 return -EINVAL;
437 kbuf = kmem_zalloc_large(*len, 0);
438 if (!kbuf)
439 return -ENOMEM;
440
441 error = xfs_attr_get(XFS_I(inode), name, &kbuf, (int *)len, flags);
442 if (error)
443 goto out_kfree;
444
445 if (copy_to_user(ubuf, kbuf, *len))
446 error = -EFAULT;
447
448out_kfree:
449 kmem_free(kbuf);
450 return error;
451}
452
453int
454xfs_attrmulti_attr_set(
455 struct inode *inode,
456 unsigned char *name,
457 const unsigned char __user *ubuf,
458 uint32_t len,
459 uint32_t flags)
460{
461 unsigned char *kbuf;
462 int error;
463
464 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
465 return -EPERM;
466 if (len > XFS_XATTR_SIZE_MAX)
467 return -EINVAL;
468
469 kbuf = memdup_user(ubuf, len);
470 if (IS_ERR(kbuf))
471 return PTR_ERR(kbuf);
472
473 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
474 if (!error)
475 xfs_forget_acl(inode, name, flags);
476 kfree(kbuf);
477 return error;
478}
479
480int
481xfs_attrmulti_attr_remove(
482 struct inode *inode,
483 unsigned char *name,
484 uint32_t flags)
485{
486 int error;
487
488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
489 return -EPERM;
490 error = xfs_attr_remove(XFS_I(inode), name, flags);
491 if (!error)
492 xfs_forget_acl(inode, name, flags);
493 return error;
494}
495
496STATIC int
497xfs_attrmulti_by_handle(
498 struct file *parfilp,
499 void __user *arg)
500{
501 int error;
502 xfs_attr_multiop_t *ops;
503 xfs_fsop_attrmulti_handlereq_t am_hreq;
504 struct dentry *dentry;
505 unsigned int i, size;
506 unsigned char *attr_name;
507
508 if (!capable(CAP_SYS_ADMIN))
509 return -EPERM;
510 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
511 return -EFAULT;
512
513 /* overflow check */
514 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
515 return -E2BIG;
516
517 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
518 if (IS_ERR(dentry))
519 return PTR_ERR(dentry);
520
521 error = -E2BIG;
522 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
523 if (!size || size > 16 * PAGE_SIZE)
524 goto out_dput;
525
526 ops = memdup_user(am_hreq.ops, size);
527 if (IS_ERR(ops)) {
528 error = PTR_ERR(ops);
529 goto out_dput;
530 }
531
532 error = -ENOMEM;
533 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
534 if (!attr_name)
535 goto out_kfree_ops;
536
537 error = 0;
538 for (i = 0; i < am_hreq.opcount; i++) {
539 ops[i].am_error = strncpy_from_user((char *)attr_name,
540 ops[i].am_attrname, MAXNAMELEN);
541 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
542 error = -ERANGE;
543 if (ops[i].am_error < 0)
544 break;
545
546 switch (ops[i].am_opcode) {
547 case ATTR_OP_GET:
548 ops[i].am_error = xfs_attrmulti_attr_get(
549 d_inode(dentry), attr_name,
550 ops[i].am_attrvalue, &ops[i].am_length,
551 ops[i].am_flags);
552 break;
553 case ATTR_OP_SET:
554 ops[i].am_error = mnt_want_write_file(parfilp);
555 if (ops[i].am_error)
556 break;
557 ops[i].am_error = xfs_attrmulti_attr_set(
558 d_inode(dentry), attr_name,
559 ops[i].am_attrvalue, ops[i].am_length,
560 ops[i].am_flags);
561 mnt_drop_write_file(parfilp);
562 break;
563 case ATTR_OP_REMOVE:
564 ops[i].am_error = mnt_want_write_file(parfilp);
565 if (ops[i].am_error)
566 break;
567 ops[i].am_error = xfs_attrmulti_attr_remove(
568 d_inode(dentry), attr_name,
569 ops[i].am_flags);
570 mnt_drop_write_file(parfilp);
571 break;
572 default:
573 ops[i].am_error = -EINVAL;
574 }
575 }
576
577 if (copy_to_user(am_hreq.ops, ops, size))
578 error = -EFAULT;
579
580 kfree(attr_name);
581 out_kfree_ops:
582 kfree(ops);
583 out_dput:
584 dput(dentry);
585 return error;
586}
587
588int
589xfs_ioc_space(
590 struct file *filp,
591 unsigned int cmd,
592 xfs_flock64_t *bf)
593{
594 struct inode *inode = file_inode(filp);
595 struct xfs_inode *ip = XFS_I(inode);
596 struct iattr iattr;
597 enum xfs_prealloc_flags flags = 0;
598 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
599 int error;
600
601 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
602 return -EPERM;
603
604 if (!(filp->f_mode & FMODE_WRITE))
605 return -EBADF;
606
607 if (!S_ISREG(inode->i_mode))
608 return -EINVAL;
609
610 if (filp->f_flags & O_DSYNC)
611 flags |= XFS_PREALLOC_SYNC;
612 if (filp->f_mode & FMODE_NOCMTIME)
613 flags |= XFS_PREALLOC_INVISIBLE;
614
615 error = mnt_want_write_file(filp);
616 if (error)
617 return error;
618
619 xfs_ilock(ip, iolock);
620 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
621 if (error)
622 goto out_unlock;
623
624 switch (bf->l_whence) {
625 case 0: /*SEEK_SET*/
626 break;
627 case 1: /*SEEK_CUR*/
628 bf->l_start += filp->f_pos;
629 break;
630 case 2: /*SEEK_END*/
631 bf->l_start += XFS_ISIZE(ip);
632 break;
633 default:
634 error = -EINVAL;
635 goto out_unlock;
636 }
637
638 /*
639 * length of <= 0 for resv/unresv/zero is invalid. length for
640 * alloc/free is ignored completely and we have no idea what userspace
641 * might have set it to, so set it to zero to allow range
642 * checks to pass.
643 */
644 switch (cmd) {
645 case XFS_IOC_ZERO_RANGE:
646 case XFS_IOC_RESVSP:
647 case XFS_IOC_RESVSP64:
648 case XFS_IOC_UNRESVSP:
649 case XFS_IOC_UNRESVSP64:
650 if (bf->l_len <= 0) {
651 error = -EINVAL;
652 goto out_unlock;
653 }
654 break;
655 default:
656 bf->l_len = 0;
657 break;
658 }
659
660 if (bf->l_start < 0 ||
661 bf->l_start > inode->i_sb->s_maxbytes ||
662 bf->l_start + bf->l_len < 0 ||
663 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
664 error = -EINVAL;
665 goto out_unlock;
666 }
667
668 switch (cmd) {
669 case XFS_IOC_ZERO_RANGE:
670 flags |= XFS_PREALLOC_SET;
671 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
672 break;
673 case XFS_IOC_RESVSP:
674 case XFS_IOC_RESVSP64:
675 flags |= XFS_PREALLOC_SET;
676 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
677 XFS_BMAPI_PREALLOC);
678 break;
679 case XFS_IOC_UNRESVSP:
680 case XFS_IOC_UNRESVSP64:
681 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
682 break;
683 case XFS_IOC_ALLOCSP:
684 case XFS_IOC_ALLOCSP64:
685 case XFS_IOC_FREESP:
686 case XFS_IOC_FREESP64:
687 flags |= XFS_PREALLOC_CLEAR;
688 if (bf->l_start > XFS_ISIZE(ip)) {
689 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
690 bf->l_start - XFS_ISIZE(ip), 0);
691 if (error)
692 goto out_unlock;
693 }
694
695 iattr.ia_valid = ATTR_SIZE;
696 iattr.ia_size = bf->l_start;
697
698 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
699 break;
700 default:
701 ASSERT(0);
702 error = -EINVAL;
703 }
704
705 if (error)
706 goto out_unlock;
707
708 error = xfs_update_prealloc_flags(ip, flags);
709
710out_unlock:
711 xfs_iunlock(ip, iolock);
712 mnt_drop_write_file(filp);
713 return error;
714}
715
716/* Return 0 on success or positive error */
717int
718xfs_fsbulkstat_one_fmt(
719 struct xfs_ibulk *breq,
720 const struct xfs_bulkstat *bstat)
721{
722 struct xfs_bstat bs1;
723
724 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
725 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
726 return -EFAULT;
727 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
728}
729
730int
731xfs_fsinumbers_fmt(
732 struct xfs_ibulk *breq,
733 const struct xfs_inumbers *igrp)
734{
735 struct xfs_inogrp ig1;
736
737 xfs_inumbers_to_inogrp(&ig1, igrp);
738 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
739 return -EFAULT;
740 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
741}
742
743STATIC int
744xfs_ioc_fsbulkstat(
745 xfs_mount_t *mp,
746 unsigned int cmd,
747 void __user *arg)
748{
749 struct xfs_fsop_bulkreq bulkreq;
750 struct xfs_ibulk breq = {
751 .mp = mp,
752 .ocount = 0,
753 };
754 xfs_ino_t lastino;
755 int error;
756
757 /* done = 1 if there are more stats to get and if bulkstat */
758 /* should be called again (unused here, but used in dmapi) */
759
760 if (!capable(CAP_SYS_ADMIN))
761 return -EPERM;
762
763 if (XFS_FORCED_SHUTDOWN(mp))
764 return -EIO;
765
766 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
767 return -EFAULT;
768
769 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
770 return -EFAULT;
771
772 if (bulkreq.icount <= 0)
773 return -EINVAL;
774
775 if (bulkreq.ubuffer == NULL)
776 return -EINVAL;
777
778 breq.ubuffer = bulkreq.ubuffer;
779 breq.icount = bulkreq.icount;
780
781 /*
782 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
783 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
784 * that *lastip contains either zero or the number of the last inode to
785 * be examined by the previous call and return results starting with
786 * the next inode after that. The new bulk request back end functions
787 * take the inode to start with, so we have to compute the startino
788 * parameter from lastino to maintain correct function. lastino == 0
789 * is a special case because it has traditionally meant "first inode
790 * in filesystem".
791 */
792 if (cmd == XFS_IOC_FSINUMBERS) {
793 breq.startino = lastino ? lastino + 1 : 0;
794 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
795 lastino = breq.startino - 1;
796 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
797 breq.startino = lastino;
798 breq.icount = 1;
799 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
800 } else { /* XFS_IOC_FSBULKSTAT */
801 breq.startino = lastino ? lastino + 1 : 0;
802 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
803 lastino = breq.startino - 1;
804 }
805
806 if (error)
807 return error;
808
809 if (bulkreq.lastip != NULL &&
810 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
811 return -EFAULT;
812
813 if (bulkreq.ocount != NULL &&
814 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
815 return -EFAULT;
816
817 return 0;
818}
819
820/* Return 0 on success or positive error */
821static int
822xfs_bulkstat_fmt(
823 struct xfs_ibulk *breq,
824 const struct xfs_bulkstat *bstat)
825{
826 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
827 return -EFAULT;
828 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
829}
830
831/*
832 * Check the incoming bulk request @hdr from userspace and initialize the
833 * internal @breq bulk request appropriately. Returns 0 if the bulk request
834 * should proceed; -ECANCELED if there's nothing to do; or the usual
835 * negative error code.
836 */
837static int
838xfs_bulk_ireq_setup(
839 struct xfs_mount *mp,
840 struct xfs_bulk_ireq *hdr,
841 struct xfs_ibulk *breq,
842 void __user *ubuffer)
843{
844 if (hdr->icount == 0 ||
845 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
846 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
847 return -EINVAL;
848
849 breq->startino = hdr->ino;
850 breq->ubuffer = ubuffer;
851 breq->icount = hdr->icount;
852 breq->ocount = 0;
853 breq->flags = 0;
854
855 /*
856 * The @ino parameter is a special value, so we must look it up here.
857 * We're not allowed to have IREQ_AGNO, and we only return one inode
858 * worth of data.
859 */
860 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
861 if (hdr->flags & XFS_BULK_IREQ_AGNO)
862 return -EINVAL;
863
864 switch (hdr->ino) {
865 case XFS_BULK_IREQ_SPECIAL_ROOT:
866 hdr->ino = mp->m_sb.sb_rootino;
867 break;
868 default:
869 return -EINVAL;
870 }
871 breq->icount = 1;
872 }
873
874 /*
875 * The IREQ_AGNO flag means that we only want results from a given AG.
876 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
877 * beyond the specified AG then we return no results.
878 */
879 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
880 if (hdr->agno >= mp->m_sb.sb_agcount)
881 return -EINVAL;
882
883 if (breq->startino == 0)
884 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
885 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
886 return -EINVAL;
887
888 breq->flags |= XFS_IBULK_SAME_AG;
889
890 /* Asking for an inode past the end of the AG? We're done! */
891 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
892 return -ECANCELED;
893 } else if (hdr->agno)
894 return -EINVAL;
895
896 /* Asking for an inode past the end of the FS? We're done! */
897 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
898 return -ECANCELED;
899
900 return 0;
901}
902
903/*
904 * Update the userspace bulk request @hdr to reflect the end state of the
905 * internal bulk request @breq.
906 */
907static void
908xfs_bulk_ireq_teardown(
909 struct xfs_bulk_ireq *hdr,
910 struct xfs_ibulk *breq)
911{
912 hdr->ino = breq->startino;
913 hdr->ocount = breq->ocount;
914}
915
916/* Handle the v5 bulkstat ioctl. */
917STATIC int
918xfs_ioc_bulkstat(
919 struct xfs_mount *mp,
920 unsigned int cmd,
921 struct xfs_bulkstat_req __user *arg)
922{
923 struct xfs_bulk_ireq hdr;
924 struct xfs_ibulk breq = {
925 .mp = mp,
926 };
927 int error;
928
929 if (!capable(CAP_SYS_ADMIN))
930 return -EPERM;
931
932 if (XFS_FORCED_SHUTDOWN(mp))
933 return -EIO;
934
935 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
936 return -EFAULT;
937
938 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
939 if (error == -ECANCELED)
940 goto out_teardown;
941 if (error < 0)
942 return error;
943
944 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
945 if (error)
946 return error;
947
948out_teardown:
949 xfs_bulk_ireq_teardown(&hdr, &breq);
950 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
951 return -EFAULT;
952
953 return 0;
954}
955
956STATIC int
957xfs_inumbers_fmt(
958 struct xfs_ibulk *breq,
959 const struct xfs_inumbers *igrp)
960{
961 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
962 return -EFAULT;
963 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
964}
965
966/* Handle the v5 inumbers ioctl. */
967STATIC int
968xfs_ioc_inumbers(
969 struct xfs_mount *mp,
970 unsigned int cmd,
971 struct xfs_inumbers_req __user *arg)
972{
973 struct xfs_bulk_ireq hdr;
974 struct xfs_ibulk breq = {
975 .mp = mp,
976 };
977 int error;
978
979 if (!capable(CAP_SYS_ADMIN))
980 return -EPERM;
981
982 if (XFS_FORCED_SHUTDOWN(mp))
983 return -EIO;
984
985 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
986 return -EFAULT;
987
988 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
989 if (error == -ECANCELED)
990 goto out_teardown;
991 if (error < 0)
992 return error;
993
994 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
995 if (error)
996 return error;
997
998out_teardown:
999 xfs_bulk_ireq_teardown(&hdr, &breq);
1000 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
1001 return -EFAULT;
1002
1003 return 0;
1004}
1005
1006STATIC int
1007xfs_ioc_fsgeometry(
1008 struct xfs_mount *mp,
1009 void __user *arg,
1010 int struct_version)
1011{
1012 struct xfs_fsop_geom fsgeo;
1013 size_t len;
1014
1015 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version);
1016
1017 if (struct_version <= 3)
1018 len = sizeof(struct xfs_fsop_geom_v1);
1019 else if (struct_version == 4)
1020 len = sizeof(struct xfs_fsop_geom_v4);
1021 else {
1022 xfs_fsop_geom_health(mp, &fsgeo);
1023 len = sizeof(fsgeo);
1024 }
1025
1026 if (copy_to_user(arg, &fsgeo, len))
1027 return -EFAULT;
1028 return 0;
1029}
1030
1031STATIC int
1032xfs_ioc_ag_geometry(
1033 struct xfs_mount *mp,
1034 void __user *arg)
1035{
1036 struct xfs_ag_geometry ageo;
1037 int error;
1038
1039 if (copy_from_user(&ageo, arg, sizeof(ageo)))
1040 return -EFAULT;
1041 if (ageo.ag_flags)
1042 return -EINVAL;
1043 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
1044 return -EINVAL;
1045
1046 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1047 if (error)
1048 return error;
1049
1050 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1051 return -EFAULT;
1052 return 0;
1053}
1054
1055/*
1056 * Linux extended inode flags interface.
1057 */
1058
1059STATIC unsigned int
1060xfs_merge_ioc_xflags(
1061 unsigned int flags,
1062 unsigned int start)
1063{
1064 unsigned int xflags = start;
1065
1066 if (flags & FS_IMMUTABLE_FL)
1067 xflags |= FS_XFLAG_IMMUTABLE;
1068 else
1069 xflags &= ~FS_XFLAG_IMMUTABLE;
1070 if (flags & FS_APPEND_FL)
1071 xflags |= FS_XFLAG_APPEND;
1072 else
1073 xflags &= ~FS_XFLAG_APPEND;
1074 if (flags & FS_SYNC_FL)
1075 xflags |= FS_XFLAG_SYNC;
1076 else
1077 xflags &= ~FS_XFLAG_SYNC;
1078 if (flags & FS_NOATIME_FL)
1079 xflags |= FS_XFLAG_NOATIME;
1080 else
1081 xflags &= ~FS_XFLAG_NOATIME;
1082 if (flags & FS_NODUMP_FL)
1083 xflags |= FS_XFLAG_NODUMP;
1084 else
1085 xflags &= ~FS_XFLAG_NODUMP;
1086
1087 return xflags;
1088}
1089
1090STATIC unsigned int
1091xfs_di2lxflags(
1092 uint16_t di_flags)
1093{
1094 unsigned int flags = 0;
1095
1096 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1097 flags |= FS_IMMUTABLE_FL;
1098 if (di_flags & XFS_DIFLAG_APPEND)
1099 flags |= FS_APPEND_FL;
1100 if (di_flags & XFS_DIFLAG_SYNC)
1101 flags |= FS_SYNC_FL;
1102 if (di_flags & XFS_DIFLAG_NOATIME)
1103 flags |= FS_NOATIME_FL;
1104 if (di_flags & XFS_DIFLAG_NODUMP)
1105 flags |= FS_NODUMP_FL;
1106 return flags;
1107}
1108
1109static void
1110xfs_fill_fsxattr(
1111 struct xfs_inode *ip,
1112 bool attr,
1113 struct fsxattr *fa)
1114{
1115 simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
1116 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
1117 fa->fsx_cowextsize = ip->i_d.di_cowextsize <<
1118 ip->i_mount->m_sb.sb_blocklog;
1119 fa->fsx_projid = xfs_get_projid(ip);
1120
1121 if (attr) {
1122 if (ip->i_afp) {
1123 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
1124 fa->fsx_nextents = xfs_iext_count(ip->i_afp);
1125 else
1126 fa->fsx_nextents = ip->i_d.di_anextents;
1127 } else
1128 fa->fsx_nextents = 0;
1129 } else {
1130 if (ip->i_df.if_flags & XFS_IFEXTENTS)
1131 fa->fsx_nextents = xfs_iext_count(&ip->i_df);
1132 else
1133 fa->fsx_nextents = ip->i_d.di_nextents;
1134 }
1135}
1136
1137STATIC int
1138xfs_ioc_fsgetxattr(
1139 xfs_inode_t *ip,
1140 int attr,
1141 void __user *arg)
1142{
1143 struct fsxattr fa;
1144
1145 xfs_ilock(ip, XFS_ILOCK_SHARED);
1146 xfs_fill_fsxattr(ip, attr, &fa);
1147 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1148
1149 if (copy_to_user(arg, &fa, sizeof(fa)))
1150 return -EFAULT;
1151 return 0;
1152}
1153
1154STATIC uint16_t
1155xfs_flags2diflags(
1156 struct xfs_inode *ip,
1157 unsigned int xflags)
1158{
1159 /* can't set PREALLOC this way, just preserve it */
1160 uint16_t di_flags =
1161 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
1162
1163 if (xflags & FS_XFLAG_IMMUTABLE)
1164 di_flags |= XFS_DIFLAG_IMMUTABLE;
1165 if (xflags & FS_XFLAG_APPEND)
1166 di_flags |= XFS_DIFLAG_APPEND;
1167 if (xflags & FS_XFLAG_SYNC)
1168 di_flags |= XFS_DIFLAG_SYNC;
1169 if (xflags & FS_XFLAG_NOATIME)
1170 di_flags |= XFS_DIFLAG_NOATIME;
1171 if (xflags & FS_XFLAG_NODUMP)
1172 di_flags |= XFS_DIFLAG_NODUMP;
1173 if (xflags & FS_XFLAG_NODEFRAG)
1174 di_flags |= XFS_DIFLAG_NODEFRAG;
1175 if (xflags & FS_XFLAG_FILESTREAM)
1176 di_flags |= XFS_DIFLAG_FILESTREAM;
1177 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1178 if (xflags & FS_XFLAG_RTINHERIT)
1179 di_flags |= XFS_DIFLAG_RTINHERIT;
1180 if (xflags & FS_XFLAG_NOSYMLINKS)
1181 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1182 if (xflags & FS_XFLAG_EXTSZINHERIT)
1183 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1184 if (xflags & FS_XFLAG_PROJINHERIT)
1185 di_flags |= XFS_DIFLAG_PROJINHERIT;
1186 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1187 if (xflags & FS_XFLAG_REALTIME)
1188 di_flags |= XFS_DIFLAG_REALTIME;
1189 if (xflags & FS_XFLAG_EXTSIZE)
1190 di_flags |= XFS_DIFLAG_EXTSIZE;
1191 }
1192
1193 return di_flags;
1194}
1195
1196STATIC uint64_t
1197xfs_flags2diflags2(
1198 struct xfs_inode *ip,
1199 unsigned int xflags)
1200{
1201 uint64_t di_flags2 =
1202 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
1203
1204 if (xflags & FS_XFLAG_DAX)
1205 di_flags2 |= XFS_DIFLAG2_DAX;
1206 if (xflags & FS_XFLAG_COWEXTSIZE)
1207 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1208
1209 return di_flags2;
1210}
1211
1212STATIC void
1213xfs_diflags_to_linux(
1214 struct xfs_inode *ip)
1215{
1216 struct inode *inode = VFS_I(ip);
1217 unsigned int xflags = xfs_ip2xflags(ip);
1218
1219 if (xflags & FS_XFLAG_IMMUTABLE)
1220 inode->i_flags |= S_IMMUTABLE;
1221 else
1222 inode->i_flags &= ~S_IMMUTABLE;
1223 if (xflags & FS_XFLAG_APPEND)
1224 inode->i_flags |= S_APPEND;
1225 else
1226 inode->i_flags &= ~S_APPEND;
1227 if (xflags & FS_XFLAG_SYNC)
1228 inode->i_flags |= S_SYNC;
1229 else
1230 inode->i_flags &= ~S_SYNC;
1231 if (xflags & FS_XFLAG_NOATIME)
1232 inode->i_flags |= S_NOATIME;
1233 else
1234 inode->i_flags &= ~S_NOATIME;
1235#if 0 /* disabled until the flag switching races are sorted out */
1236 if (xflags & FS_XFLAG_DAX)
1237 inode->i_flags |= S_DAX;
1238 else
1239 inode->i_flags &= ~S_DAX;
1240#endif
1241}
1242
1243static int
1244xfs_ioctl_setattr_xflags(
1245 struct xfs_trans *tp,
1246 struct xfs_inode *ip,
1247 struct fsxattr *fa)
1248{
1249 struct xfs_mount *mp = ip->i_mount;
1250 uint64_t di_flags2;
1251
1252 /* Can't change realtime flag if any extents are allocated. */
1253 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1254 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1255 return -EINVAL;
1256
1257 /* If realtime flag is set then must have realtime device */
1258 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1259 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1260 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1261 return -EINVAL;
1262 }
1263
1264 /* Clear reflink if we are actually able to set the rt flag. */
1265 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1266 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1267
1268 /* Don't allow us to set DAX mode for a reflinked file for now. */
1269 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1270 return -EINVAL;
1271
1272 /* diflags2 only valid for v3 inodes. */
1273 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1274 if (di_flags2 && ip->i_d.di_version < 3)
1275 return -EINVAL;
1276
1277 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1278 ip->i_d.di_flags2 = di_flags2;
1279
1280 xfs_diflags_to_linux(ip);
1281 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1282 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1283 XFS_STATS_INC(mp, xs_ig_attrchg);
1284 return 0;
1285}
1286
1287/*
1288 * If we are changing DAX flags, we have to ensure the file is clean and any
1289 * cached objects in the address space are invalidated and removed. This
1290 * requires us to lock out other IO and page faults similar to a truncate
1291 * operation. The locks need to be held until the transaction has been committed
1292 * so that the cache invalidation is atomic with respect to the DAX flag
1293 * manipulation.
1294 */
1295static int
1296xfs_ioctl_setattr_dax_invalidate(
1297 struct xfs_inode *ip,
1298 struct fsxattr *fa,
1299 int *join_flags)
1300{
1301 struct inode *inode = VFS_I(ip);
1302 struct super_block *sb = inode->i_sb;
1303 int error;
1304
1305 *join_flags = 0;
1306
1307 /*
1308 * It is only valid to set the DAX flag on regular files and
1309 * directories on filesystems where the block size is equal to the page
1310 * size. On directories it serves as an inherited hint so we don't
1311 * have to check the device for dax support or flush pagecache.
1312 */
1313 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1314 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1315 return -EINVAL;
1316 if (!bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)),
1317 sb->s_blocksize))
1318 return -EINVAL;
1319 }
1320
1321 /* If the DAX state is not changing, we have nothing to do here. */
1322 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1323 return 0;
1324 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1325 return 0;
1326
1327 if (S_ISDIR(inode->i_mode))
1328 return 0;
1329
1330 /* lock, flush and invalidate mapping in preparation for flag change */
1331 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1332 error = filemap_write_and_wait(inode->i_mapping);
1333 if (error)
1334 goto out_unlock;
1335 error = invalidate_inode_pages2(inode->i_mapping);
1336 if (error)
1337 goto out_unlock;
1338
1339 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1340 return 0;
1341
1342out_unlock:
1343 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1344 return error;
1345
1346}
1347
1348/*
1349 * Set up the transaction structure for the setattr operation, checking that we
1350 * have permission to do so. On success, return a clean transaction and the
1351 * inode locked exclusively ready for further operation specific checks. On
1352 * failure, return an error without modifying or locking the inode.
1353 *
1354 * The inode might already be IO locked on call. If this is the case, it is
1355 * indicated in @join_flags and we take full responsibility for ensuring they
1356 * are unlocked from now on. Hence if we have an error here, we still have to
1357 * unlock them. Otherwise, once they are joined to the transaction, they will
1358 * be unlocked on commit/cancel.
1359 */
1360static struct xfs_trans *
1361xfs_ioctl_setattr_get_trans(
1362 struct xfs_inode *ip,
1363 int join_flags)
1364{
1365 struct xfs_mount *mp = ip->i_mount;
1366 struct xfs_trans *tp;
1367 int error = -EROFS;
1368
1369 if (mp->m_flags & XFS_MOUNT_RDONLY)
1370 goto out_unlock;
1371 error = -EIO;
1372 if (XFS_FORCED_SHUTDOWN(mp))
1373 goto out_unlock;
1374
1375 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1376 if (error)
1377 goto out_unlock;
1378
1379 xfs_ilock(ip, XFS_ILOCK_EXCL);
1380 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1381 join_flags = 0;
1382
1383 /*
1384 * CAP_FOWNER overrides the following restrictions:
1385 *
1386 * The user ID of the calling process must be equal to the file owner
1387 * ID, except in cases where the CAP_FSETID capability is applicable.
1388 */
1389 if (!inode_owner_or_capable(VFS_I(ip))) {
1390 error = -EPERM;
1391 goto out_cancel;
1392 }
1393
1394 if (mp->m_flags & XFS_MOUNT_WSYNC)
1395 xfs_trans_set_sync(tp);
1396
1397 return tp;
1398
1399out_cancel:
1400 xfs_trans_cancel(tp);
1401out_unlock:
1402 if (join_flags)
1403 xfs_iunlock(ip, join_flags);
1404 return ERR_PTR(error);
1405}
1406
1407/*
1408 * extent size hint validation is somewhat cumbersome. Rules are:
1409 *
1410 * 1. extent size hint is only valid for directories and regular files
1411 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1412 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1413 * 4. can only be changed on regular files if no extents are allocated
1414 * 5. can be changed on directories at any time
1415 * 6. extsize hint of 0 turns off hints, clears inode flags.
1416 * 7. Extent size must be a multiple of the appropriate block size.
1417 * 8. for non-realtime files, the extent size hint must be limited
1418 * to half the AG size to avoid alignment extending the extent beyond the
1419 * limits of the AG.
1420 *
1421 * Please keep this function in sync with xfs_scrub_inode_extsize.
1422 */
1423static int
1424xfs_ioctl_setattr_check_extsize(
1425 struct xfs_inode *ip,
1426 struct fsxattr *fa)
1427{
1428 struct xfs_mount *mp = ip->i_mount;
1429 xfs_extlen_t size;
1430 xfs_fsblock_t extsize_fsb;
1431
1432 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1433 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1434 return -EINVAL;
1435
1436 if (fa->fsx_extsize == 0)
1437 return 0;
1438
1439 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1440 if (extsize_fsb > MAXEXTLEN)
1441 return -EINVAL;
1442
1443 if (XFS_IS_REALTIME_INODE(ip) ||
1444 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1445 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1446 } else {
1447 size = mp->m_sb.sb_blocksize;
1448 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1449 return -EINVAL;
1450 }
1451
1452 if (fa->fsx_extsize % size)
1453 return -EINVAL;
1454
1455 return 0;
1456}
1457
1458/*
1459 * CoW extent size hint validation rules are:
1460 *
1461 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1462 * The inode does not have to have any shared blocks, but it must be a v3.
1463 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1464 * for a directory, the hint is propagated to new files.
1465 * 3. Can be changed on files & directories at any time.
1466 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1467 * 5. Extent size must be a multiple of the appropriate block size.
1468 * 6. The extent size hint must be limited to half the AG size to avoid
1469 * alignment extending the extent beyond the limits of the AG.
1470 *
1471 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1472 */
1473static int
1474xfs_ioctl_setattr_check_cowextsize(
1475 struct xfs_inode *ip,
1476 struct fsxattr *fa)
1477{
1478 struct xfs_mount *mp = ip->i_mount;
1479 xfs_extlen_t size;
1480 xfs_fsblock_t cowextsize_fsb;
1481
1482 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1483 return 0;
1484
1485 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1486 ip->i_d.di_version != 3)
1487 return -EINVAL;
1488
1489 if (fa->fsx_cowextsize == 0)
1490 return 0;
1491
1492 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1493 if (cowextsize_fsb > MAXEXTLEN)
1494 return -EINVAL;
1495
1496 size = mp->m_sb.sb_blocksize;
1497 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1498 return -EINVAL;
1499
1500 if (fa->fsx_cowextsize % size)
1501 return -EINVAL;
1502
1503 return 0;
1504}
1505
1506static int
1507xfs_ioctl_setattr_check_projid(
1508 struct xfs_inode *ip,
1509 struct fsxattr *fa)
1510{
1511 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1512 if (fa->fsx_projid > (uint16_t)-1 &&
1513 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1514 return -EINVAL;
1515 return 0;
1516}
1517
1518STATIC int
1519xfs_ioctl_setattr(
1520 xfs_inode_t *ip,
1521 struct fsxattr *fa)
1522{
1523 struct fsxattr old_fa;
1524 struct xfs_mount *mp = ip->i_mount;
1525 struct xfs_trans *tp;
1526 struct xfs_dquot *udqp = NULL;
1527 struct xfs_dquot *pdqp = NULL;
1528 struct xfs_dquot *olddquot = NULL;
1529 int code;
1530 int join_flags = 0;
1531
1532 trace_xfs_ioctl_setattr(ip);
1533
1534 code = xfs_ioctl_setattr_check_projid(ip, fa);
1535 if (code)
1536 return code;
1537
1538 /*
1539 * If disk quotas is on, we make sure that the dquots do exist on disk,
1540 * before we start any other transactions. Trying to do this later
1541 * is messy. We don't care to take a readlock to look at the ids
1542 * in inode here, because we can't hold it across the trans_reserve.
1543 * If the IDs do change before we take the ilock, we're covered
1544 * because the i_*dquot fields will get updated anyway.
1545 */
1546 if (XFS_IS_QUOTA_ON(mp)) {
1547 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1548 ip->i_d.di_gid, fa->fsx_projid,
1549 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1550 if (code)
1551 return code;
1552 }
1553
1554 /*
1555 * Changing DAX config may require inode locking for mapping
1556 * invalidation. These need to be held all the way to transaction commit
1557 * or cancel time, so need to be passed through to
1558 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1559 * appropriately.
1560 */
1561 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1562 if (code)
1563 goto error_free_dquots;
1564
1565 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1566 if (IS_ERR(tp)) {
1567 code = PTR_ERR(tp);
1568 goto error_free_dquots;
1569 }
1570
1571 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1572 xfs_get_projid(ip) != fa->fsx_projid) {
1573 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1574 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1575 if (code) /* out of quota */
1576 goto error_trans_cancel;
1577 }
1578
1579 xfs_fill_fsxattr(ip, false, &old_fa);
1580 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa);
1581 if (code)
1582 goto error_trans_cancel;
1583
1584 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1585 if (code)
1586 goto error_trans_cancel;
1587
1588 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1589 if (code)
1590 goto error_trans_cancel;
1591
1592 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1593 if (code)
1594 goto error_trans_cancel;
1595
1596 /*
1597 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1598 * overrides the following restrictions:
1599 *
1600 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1601 * successful return from chown()
1602 */
1603
1604 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1605 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1606 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1607
1608 /* Change the ownerships and register project quota modifications */
1609 if (xfs_get_projid(ip) != fa->fsx_projid) {
1610 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1611 olddquot = xfs_qm_vop_chown(tp, ip,
1612 &ip->i_pdquot, pdqp);
1613 }
1614 ASSERT(ip->i_d.di_version > 1);
1615 xfs_set_projid(ip, fa->fsx_projid);
1616 }
1617
1618 /*
1619 * Only set the extent size hint if we've already determined that the
1620 * extent size hint should be set on the inode. If no extent size flags
1621 * are set on the inode then unconditionally clear the extent size hint.
1622 */
1623 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1624 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1625 else
1626 ip->i_d.di_extsize = 0;
1627 if (ip->i_d.di_version == 3 &&
1628 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1629 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1630 mp->m_sb.sb_blocklog;
1631 else
1632 ip->i_d.di_cowextsize = 0;
1633
1634 code = xfs_trans_commit(tp);
1635
1636 /*
1637 * Release any dquot(s) the inode had kept before chown.
1638 */
1639 xfs_qm_dqrele(olddquot);
1640 xfs_qm_dqrele(udqp);
1641 xfs_qm_dqrele(pdqp);
1642
1643 return code;
1644
1645error_trans_cancel:
1646 xfs_trans_cancel(tp);
1647error_free_dquots:
1648 xfs_qm_dqrele(udqp);
1649 xfs_qm_dqrele(pdqp);
1650 return code;
1651}
1652
1653STATIC int
1654xfs_ioc_fssetxattr(
1655 xfs_inode_t *ip,
1656 struct file *filp,
1657 void __user *arg)
1658{
1659 struct fsxattr fa;
1660 int error;
1661
1662 if (copy_from_user(&fa, arg, sizeof(fa)))
1663 return -EFAULT;
1664
1665 error = mnt_want_write_file(filp);
1666 if (error)
1667 return error;
1668 error = xfs_ioctl_setattr(ip, &fa);
1669 mnt_drop_write_file(filp);
1670 return error;
1671}
1672
1673STATIC int
1674xfs_ioc_getxflags(
1675 xfs_inode_t *ip,
1676 void __user *arg)
1677{
1678 unsigned int flags;
1679
1680 flags = xfs_di2lxflags(ip->i_d.di_flags);
1681 if (copy_to_user(arg, &flags, sizeof(flags)))
1682 return -EFAULT;
1683 return 0;
1684}
1685
1686STATIC int
1687xfs_ioc_setxflags(
1688 struct xfs_inode *ip,
1689 struct file *filp,
1690 void __user *arg)
1691{
1692 struct xfs_trans *tp;
1693 struct fsxattr fa;
1694 struct fsxattr old_fa;
1695 unsigned int flags;
1696 int join_flags = 0;
1697 int error;
1698
1699 if (copy_from_user(&flags, arg, sizeof(flags)))
1700 return -EFAULT;
1701
1702 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1703 FS_NOATIME_FL | FS_NODUMP_FL | \
1704 FS_SYNC_FL))
1705 return -EOPNOTSUPP;
1706
1707 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1708
1709 error = mnt_want_write_file(filp);
1710 if (error)
1711 return error;
1712
1713 /*
1714 * Changing DAX config may require inode locking for mapping
1715 * invalidation. These need to be held all the way to transaction commit
1716 * or cancel time, so need to be passed through to
1717 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1718 * appropriately.
1719 */
1720 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1721 if (error)
1722 goto out_drop_write;
1723
1724 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1725 if (IS_ERR(tp)) {
1726 error = PTR_ERR(tp);
1727 goto out_drop_write;
1728 }
1729
1730 xfs_fill_fsxattr(ip, false, &old_fa);
1731 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa);
1732 if (error) {
1733 xfs_trans_cancel(tp);
1734 goto out_drop_write;
1735 }
1736
1737 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1738 if (error) {
1739 xfs_trans_cancel(tp);
1740 goto out_drop_write;
1741 }
1742
1743 error = xfs_trans_commit(tp);
1744out_drop_write:
1745 mnt_drop_write_file(filp);
1746 return error;
1747}
1748
1749static bool
1750xfs_getbmap_format(
1751 struct kgetbmap *p,
1752 struct getbmapx __user *u,
1753 size_t recsize)
1754{
1755 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1756 put_user(p->bmv_block, &u->bmv_block) ||
1757 put_user(p->bmv_length, &u->bmv_length) ||
1758 put_user(0, &u->bmv_count) ||
1759 put_user(0, &u->bmv_entries))
1760 return false;
1761 if (recsize < sizeof(struct getbmapx))
1762 return true;
1763 if (put_user(0, &u->bmv_iflags) ||
1764 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1765 put_user(0, &u->bmv_unused1) ||
1766 put_user(0, &u->bmv_unused2))
1767 return false;
1768 return true;
1769}
1770
1771STATIC int
1772xfs_ioc_getbmap(
1773 struct file *file,
1774 unsigned int cmd,
1775 void __user *arg)
1776{
1777 struct getbmapx bmx = { 0 };
1778 struct kgetbmap *buf;
1779 size_t recsize;
1780 int error, i;
1781
1782 switch (cmd) {
1783 case XFS_IOC_GETBMAPA:
1784 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1785 /*FALLTHRU*/
1786 case XFS_IOC_GETBMAP:
1787 if (file->f_mode & FMODE_NOCMTIME)
1788 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1789 /* struct getbmap is a strict subset of struct getbmapx. */
1790 recsize = sizeof(struct getbmap);
1791 break;
1792 case XFS_IOC_GETBMAPX:
1793 recsize = sizeof(struct getbmapx);
1794 break;
1795 default:
1796 return -EINVAL;
1797 }
1798
1799 if (copy_from_user(&bmx, arg, recsize))
1800 return -EFAULT;
1801
1802 if (bmx.bmv_count < 2)
1803 return -EINVAL;
1804 if (bmx.bmv_count > ULONG_MAX / recsize)
1805 return -ENOMEM;
1806
1807 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1808 if (!buf)
1809 return -ENOMEM;
1810
1811 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1812 if (error)
1813 goto out_free_buf;
1814
1815 error = -EFAULT;
1816 if (copy_to_user(arg, &bmx, recsize))
1817 goto out_free_buf;
1818 arg += recsize;
1819
1820 for (i = 0; i < bmx.bmv_entries; i++) {
1821 if (!xfs_getbmap_format(buf + i, arg, recsize))
1822 goto out_free_buf;
1823 arg += recsize;
1824 }
1825
1826 error = 0;
1827out_free_buf:
1828 kmem_free(buf);
1829 return error;
1830}
1831
1832struct getfsmap_info {
1833 struct xfs_mount *mp;
1834 struct fsmap_head __user *data;
1835 unsigned int idx;
1836 __u32 last_flags;
1837};
1838
1839STATIC int
1840xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1841{
1842 struct getfsmap_info *info = priv;
1843 struct fsmap fm;
1844
1845 trace_xfs_getfsmap_mapping(info->mp, xfm);
1846
1847 info->last_flags = xfm->fmr_flags;
1848 xfs_fsmap_from_internal(&fm, xfm);
1849 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1850 sizeof(struct fsmap)))
1851 return -EFAULT;
1852
1853 return 0;
1854}
1855
1856STATIC int
1857xfs_ioc_getfsmap(
1858 struct xfs_inode *ip,
1859 struct fsmap_head __user *arg)
1860{
1861 struct getfsmap_info info = { NULL };
1862 struct xfs_fsmap_head xhead = {0};
1863 struct fsmap_head head;
1864 bool aborted = false;
1865 int error;
1866
1867 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1868 return -EFAULT;
1869 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1870 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1871 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1872 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1873 sizeof(head.fmh_keys[1].fmr_reserved)))
1874 return -EINVAL;
1875
1876 xhead.fmh_iflags = head.fmh_iflags;
1877 xhead.fmh_count = head.fmh_count;
1878 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1879 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1880
1881 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1882 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1883
1884 info.mp = ip->i_mount;
1885 info.data = arg;
1886 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1887 if (error == -ECANCELED) {
1888 error = 0;
1889 aborted = true;
1890 } else if (error)
1891 return error;
1892
1893 /* If we didn't abort, set the "last" flag in the last fmx */
1894 if (!aborted && info.idx) {
1895 info.last_flags |= FMR_OF_LAST;
1896 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1897 &info.last_flags, sizeof(info.last_flags)))
1898 return -EFAULT;
1899 }
1900
1901 /* copy back header */
1902 head.fmh_entries = xhead.fmh_entries;
1903 head.fmh_oflags = xhead.fmh_oflags;
1904 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1905 return -EFAULT;
1906
1907 return 0;
1908}
1909
1910STATIC int
1911xfs_ioc_scrub_metadata(
1912 struct xfs_inode *ip,
1913 void __user *arg)
1914{
1915 struct xfs_scrub_metadata scrub;
1916 int error;
1917
1918 if (!capable(CAP_SYS_ADMIN))
1919 return -EPERM;
1920
1921 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1922 return -EFAULT;
1923
1924 error = xfs_scrub_metadata(ip, &scrub);
1925 if (error)
1926 return error;
1927
1928 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1929 return -EFAULT;
1930
1931 return 0;
1932}
1933
1934int
1935xfs_ioc_swapext(
1936 xfs_swapext_t *sxp)
1937{
1938 xfs_inode_t *ip, *tip;
1939 struct fd f, tmp;
1940 int error = 0;
1941
1942 /* Pull information for the target fd */
1943 f = fdget((int)sxp->sx_fdtarget);
1944 if (!f.file) {
1945 error = -EINVAL;
1946 goto out;
1947 }
1948
1949 if (!(f.file->f_mode & FMODE_WRITE) ||
1950 !(f.file->f_mode & FMODE_READ) ||
1951 (f.file->f_flags & O_APPEND)) {
1952 error = -EBADF;
1953 goto out_put_file;
1954 }
1955
1956 tmp = fdget((int)sxp->sx_fdtmp);
1957 if (!tmp.file) {
1958 error = -EINVAL;
1959 goto out_put_file;
1960 }
1961
1962 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1963 !(tmp.file->f_mode & FMODE_READ) ||
1964 (tmp.file->f_flags & O_APPEND)) {
1965 error = -EBADF;
1966 goto out_put_tmp_file;
1967 }
1968
1969 if (IS_SWAPFILE(file_inode(f.file)) ||
1970 IS_SWAPFILE(file_inode(tmp.file))) {
1971 error = -EINVAL;
1972 goto out_put_tmp_file;
1973 }
1974
1975 /*
1976 * We need to ensure that the fds passed in point to XFS inodes
1977 * before we cast and access them as XFS structures as we have no
1978 * control over what the user passes us here.
1979 */
1980 if (f.file->f_op != &xfs_file_operations ||
1981 tmp.file->f_op != &xfs_file_operations) {
1982 error = -EINVAL;
1983 goto out_put_tmp_file;
1984 }
1985
1986 ip = XFS_I(file_inode(f.file));
1987 tip = XFS_I(file_inode(tmp.file));
1988
1989 if (ip->i_mount != tip->i_mount) {
1990 error = -EINVAL;
1991 goto out_put_tmp_file;
1992 }
1993
1994 if (ip->i_ino == tip->i_ino) {
1995 error = -EINVAL;
1996 goto out_put_tmp_file;
1997 }
1998
1999 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
2000 error = -EIO;
2001 goto out_put_tmp_file;
2002 }
2003
2004 error = xfs_swap_extents(ip, tip, sxp);
2005
2006 out_put_tmp_file:
2007 fdput(tmp);
2008 out_put_file:
2009 fdput(f);
2010 out:
2011 return error;
2012}
2013
2014static int
2015xfs_ioc_getlabel(
2016 struct xfs_mount *mp,
2017 char __user *user_label)
2018{
2019 struct xfs_sb *sbp = &mp->m_sb;
2020 char label[XFSLABEL_MAX + 1];
2021
2022 /* Paranoia */
2023 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
2024
2025 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
2026 memset(label, 0, sizeof(label));
2027 spin_lock(&mp->m_sb_lock);
2028 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
2029 spin_unlock(&mp->m_sb_lock);
2030
2031 if (copy_to_user(user_label, label, sizeof(label)))
2032 return -EFAULT;
2033 return 0;
2034}
2035
2036static int
2037xfs_ioc_setlabel(
2038 struct file *filp,
2039 struct xfs_mount *mp,
2040 char __user *newlabel)
2041{
2042 struct xfs_sb *sbp = &mp->m_sb;
2043 char label[XFSLABEL_MAX + 1];
2044 size_t len;
2045 int error;
2046
2047 if (!capable(CAP_SYS_ADMIN))
2048 return -EPERM;
2049 /*
2050 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
2051 * smaller, at 12 bytes. We copy one more to be sure we find the
2052 * (required) NULL character to test the incoming label length.
2053 * NB: The on disk label doesn't need to be null terminated.
2054 */
2055 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
2056 return -EFAULT;
2057 len = strnlen(label, XFSLABEL_MAX + 1);
2058 if (len > sizeof(sbp->sb_fname))
2059 return -EINVAL;
2060
2061 error = mnt_want_write_file(filp);
2062 if (error)
2063 return error;
2064
2065 spin_lock(&mp->m_sb_lock);
2066 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
2067 memcpy(sbp->sb_fname, label, len);
2068 spin_unlock(&mp->m_sb_lock);
2069
2070 /*
2071 * Now we do several things to satisfy userspace.
2072 * In addition to normal logging of the primary superblock, we also
2073 * immediately write these changes to sector zero for the primary, then
2074 * update all backup supers (as xfs_db does for a label change), then
2075 * invalidate the block device page cache. This is so that any prior
2076 * buffered reads from userspace (i.e. from blkid) are invalidated,
2077 * and userspace will see the newly-written label.
2078 */
2079 error = xfs_sync_sb_buf(mp);
2080 if (error)
2081 goto out;
2082 /*
2083 * growfs also updates backup supers so lock against that.
2084 */
2085 mutex_lock(&mp->m_growlock);
2086 error = xfs_update_secondary_sbs(mp);
2087 mutex_unlock(&mp->m_growlock);
2088
2089 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
2090
2091out:
2092 mnt_drop_write_file(filp);
2093 return error;
2094}
2095
2096/*
2097 * Note: some of the ioctl's return positive numbers as a
2098 * byte count indicating success, such as readlink_by_handle.
2099 * So we don't "sign flip" like most other routines. This means
2100 * true errors need to be returned as a negative value.
2101 */
2102long
2103xfs_file_ioctl(
2104 struct file *filp,
2105 unsigned int cmd,
2106 unsigned long p)
2107{
2108 struct inode *inode = file_inode(filp);
2109 struct xfs_inode *ip = XFS_I(inode);
2110 struct xfs_mount *mp = ip->i_mount;
2111 void __user *arg = (void __user *)p;
2112 int error;
2113
2114 trace_xfs_file_ioctl(ip);
2115
2116 switch (cmd) {
2117 case FITRIM:
2118 return xfs_ioc_trim(mp, arg);
2119 case FS_IOC_GETFSLABEL:
2120 return xfs_ioc_getlabel(mp, arg);
2121 case FS_IOC_SETFSLABEL:
2122 return xfs_ioc_setlabel(filp, mp, arg);
2123 case XFS_IOC_ALLOCSP:
2124 case XFS_IOC_FREESP:
2125 case XFS_IOC_RESVSP:
2126 case XFS_IOC_UNRESVSP:
2127 case XFS_IOC_ALLOCSP64:
2128 case XFS_IOC_FREESP64:
2129 case XFS_IOC_RESVSP64:
2130 case XFS_IOC_UNRESVSP64:
2131 case XFS_IOC_ZERO_RANGE: {
2132 xfs_flock64_t bf;
2133
2134 if (copy_from_user(&bf, arg, sizeof(bf)))
2135 return -EFAULT;
2136 return xfs_ioc_space(filp, cmd, &bf);
2137 }
2138 case XFS_IOC_DIOINFO: {
2139 struct dioattr da;
2140 xfs_buftarg_t *target =
2141 XFS_IS_REALTIME_INODE(ip) ?
2142 mp->m_rtdev_targp : mp->m_ddev_targp;
2143
2144 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
2145 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
2146
2147 if (copy_to_user(arg, &da, sizeof(da)))
2148 return -EFAULT;
2149 return 0;
2150 }
2151
2152 case XFS_IOC_FSBULKSTAT_SINGLE:
2153 case XFS_IOC_FSBULKSTAT:
2154 case XFS_IOC_FSINUMBERS:
2155 return xfs_ioc_fsbulkstat(mp, cmd, arg);
2156
2157 case XFS_IOC_BULKSTAT:
2158 return xfs_ioc_bulkstat(mp, cmd, arg);
2159 case XFS_IOC_INUMBERS:
2160 return xfs_ioc_inumbers(mp, cmd, arg);
2161
2162 case XFS_IOC_FSGEOMETRY_V1:
2163 return xfs_ioc_fsgeometry(mp, arg, 3);
2164 case XFS_IOC_FSGEOMETRY_V4:
2165 return xfs_ioc_fsgeometry(mp, arg, 4);
2166 case XFS_IOC_FSGEOMETRY:
2167 return xfs_ioc_fsgeometry(mp, arg, 5);
2168
2169 case XFS_IOC_AG_GEOMETRY:
2170 return xfs_ioc_ag_geometry(mp, arg);
2171
2172 case XFS_IOC_GETVERSION:
2173 return put_user(inode->i_generation, (int __user *)arg);
2174
2175 case XFS_IOC_FSGETXATTR:
2176 return xfs_ioc_fsgetxattr(ip, 0, arg);
2177 case XFS_IOC_FSGETXATTRA:
2178 return xfs_ioc_fsgetxattr(ip, 1, arg);
2179 case XFS_IOC_FSSETXATTR:
2180 return xfs_ioc_fssetxattr(ip, filp, arg);
2181 case XFS_IOC_GETXFLAGS:
2182 return xfs_ioc_getxflags(ip, arg);
2183 case XFS_IOC_SETXFLAGS:
2184 return xfs_ioc_setxflags(ip, filp, arg);
2185
2186 case XFS_IOC_FSSETDM: {
2187 struct fsdmidata dmi;
2188
2189 if (copy_from_user(&dmi, arg, sizeof(dmi)))
2190 return -EFAULT;
2191
2192 error = mnt_want_write_file(filp);
2193 if (error)
2194 return error;
2195
2196 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
2197 dmi.fsd_dmstate);
2198 mnt_drop_write_file(filp);
2199 return error;
2200 }
2201
2202 case XFS_IOC_GETBMAP:
2203 case XFS_IOC_GETBMAPA:
2204 case XFS_IOC_GETBMAPX:
2205 return xfs_ioc_getbmap(filp, cmd, arg);
2206
2207 case FS_IOC_GETFSMAP:
2208 return xfs_ioc_getfsmap(ip, arg);
2209
2210 case XFS_IOC_SCRUB_METADATA:
2211 return xfs_ioc_scrub_metadata(ip, arg);
2212
2213 case XFS_IOC_FD_TO_HANDLE:
2214 case XFS_IOC_PATH_TO_HANDLE:
2215 case XFS_IOC_PATH_TO_FSHANDLE: {
2216 xfs_fsop_handlereq_t hreq;
2217
2218 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2219 return -EFAULT;
2220 return xfs_find_handle(cmd, &hreq);
2221 }
2222 case XFS_IOC_OPEN_BY_HANDLE: {
2223 xfs_fsop_handlereq_t hreq;
2224
2225 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2226 return -EFAULT;
2227 return xfs_open_by_handle(filp, &hreq);
2228 }
2229 case XFS_IOC_FSSETDM_BY_HANDLE:
2230 return xfs_fssetdm_by_handle(filp, arg);
2231
2232 case XFS_IOC_READLINK_BY_HANDLE: {
2233 xfs_fsop_handlereq_t hreq;
2234
2235 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2236 return -EFAULT;
2237 return xfs_readlink_by_handle(filp, &hreq);
2238 }
2239 case XFS_IOC_ATTRLIST_BY_HANDLE:
2240 return xfs_attrlist_by_handle(filp, arg);
2241
2242 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2243 return xfs_attrmulti_by_handle(filp, arg);
2244
2245 case XFS_IOC_SWAPEXT: {
2246 struct xfs_swapext sxp;
2247
2248 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2249 return -EFAULT;
2250 error = mnt_want_write_file(filp);
2251 if (error)
2252 return error;
2253 error = xfs_ioc_swapext(&sxp);
2254 mnt_drop_write_file(filp);
2255 return error;
2256 }
2257
2258 case XFS_IOC_FSCOUNTS: {
2259 xfs_fsop_counts_t out;
2260
2261 xfs_fs_counts(mp, &out);
2262
2263 if (copy_to_user(arg, &out, sizeof(out)))
2264 return -EFAULT;
2265 return 0;
2266 }
2267
2268 case XFS_IOC_SET_RESBLKS: {
2269 xfs_fsop_resblks_t inout;
2270 uint64_t in;
2271
2272 if (!capable(CAP_SYS_ADMIN))
2273 return -EPERM;
2274
2275 if (mp->m_flags & XFS_MOUNT_RDONLY)
2276 return -EROFS;
2277
2278 if (copy_from_user(&inout, arg, sizeof(inout)))
2279 return -EFAULT;
2280
2281 error = mnt_want_write_file(filp);
2282 if (error)
2283 return error;
2284
2285 /* input parameter is passed in resblks field of structure */
2286 in = inout.resblks;
2287 error = xfs_reserve_blocks(mp, &in, &inout);
2288 mnt_drop_write_file(filp);
2289 if (error)
2290 return error;
2291
2292 if (copy_to_user(arg, &inout, sizeof(inout)))
2293 return -EFAULT;
2294 return 0;
2295 }
2296
2297 case XFS_IOC_GET_RESBLKS: {
2298 xfs_fsop_resblks_t out;
2299
2300 if (!capable(CAP_SYS_ADMIN))
2301 return -EPERM;
2302
2303 error = xfs_reserve_blocks(mp, NULL, &out);
2304 if (error)
2305 return error;
2306
2307 if (copy_to_user(arg, &out, sizeof(out)))
2308 return -EFAULT;
2309
2310 return 0;
2311 }
2312
2313 case XFS_IOC_FSGROWFSDATA: {
2314 xfs_growfs_data_t in;
2315
2316 if (copy_from_user(&in, arg, sizeof(in)))
2317 return -EFAULT;
2318
2319 error = mnt_want_write_file(filp);
2320 if (error)
2321 return error;
2322 error = xfs_growfs_data(mp, &in);
2323 mnt_drop_write_file(filp);
2324 return error;
2325 }
2326
2327 case XFS_IOC_FSGROWFSLOG: {
2328 xfs_growfs_log_t in;
2329
2330 if (copy_from_user(&in, arg, sizeof(in)))
2331 return -EFAULT;
2332
2333 error = mnt_want_write_file(filp);
2334 if (error)
2335 return error;
2336 error = xfs_growfs_log(mp, &in);
2337 mnt_drop_write_file(filp);
2338 return error;
2339 }
2340
2341 case XFS_IOC_FSGROWFSRT: {
2342 xfs_growfs_rt_t in;
2343
2344 if (copy_from_user(&in, arg, sizeof(in)))
2345 return -EFAULT;
2346
2347 error = mnt_want_write_file(filp);
2348 if (error)
2349 return error;
2350 error = xfs_growfs_rt(mp, &in);
2351 mnt_drop_write_file(filp);
2352 return error;
2353 }
2354
2355 case XFS_IOC_GOINGDOWN: {
2356 uint32_t in;
2357
2358 if (!capable(CAP_SYS_ADMIN))
2359 return -EPERM;
2360
2361 if (get_user(in, (uint32_t __user *)arg))
2362 return -EFAULT;
2363
2364 return xfs_fs_goingdown(mp, in);
2365 }
2366
2367 case XFS_IOC_ERROR_INJECTION: {
2368 xfs_error_injection_t in;
2369
2370 if (!capable(CAP_SYS_ADMIN))
2371 return -EPERM;
2372
2373 if (copy_from_user(&in, arg, sizeof(in)))
2374 return -EFAULT;
2375
2376 return xfs_errortag_add(mp, in.errtag);
2377 }
2378
2379 case XFS_IOC_ERROR_CLEARALL:
2380 if (!capable(CAP_SYS_ADMIN))
2381 return -EPERM;
2382
2383 return xfs_errortag_clearall(mp);
2384
2385 case XFS_IOC_FREE_EOFBLOCKS: {
2386 struct xfs_fs_eofblocks eofb;
2387 struct xfs_eofblocks keofb;
2388
2389 if (!capable(CAP_SYS_ADMIN))
2390 return -EPERM;
2391
2392 if (mp->m_flags & XFS_MOUNT_RDONLY)
2393 return -EROFS;
2394
2395 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2396 return -EFAULT;
2397
2398 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2399 if (error)
2400 return error;
2401
2402 return xfs_icache_free_eofblocks(mp, &keofb);
2403 }
2404
2405 default:
2406 return -ENOTTY;
2407 }
2408}