1
2
3
4
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
42
43
44
45
46
47
48
49
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_lpath((const char __user *)hreq->path, &path);
71 if (error)
72 return error;
73 inode = d_inode(path.dentry);
74 }
75 ip = XFS_I(inode);
76
77
78
79
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
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
126
127
128STATIC int
129xfs_handle_acceptable(
130 void *context,
131 struct dentry *dentry)
132{
133 return 1;
134}
135
136
137
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
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
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
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
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
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, KM_SLEEP);
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, KM_SLEEP);
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
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:
626 break;
627 case 1:
628 bf->l_start += filp->f_pos;
629 break;
630 case 2:
631 bf->l_start += XFS_ISIZE(ip);
632 break;
633 default:
634 error = -EINVAL;
635 goto out_unlock;
636 }
637
638
639
640
641
642
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
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
758
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
783
784
785
786
787
788
789
790
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 {
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
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
833
834
835
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
857
858
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
876
877
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
891 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
892 return XFS_ITER_ABORT;
893 } else if (hdr->agno)
894 return -EINVAL;
895
896
897 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
898 return XFS_ITER_ABORT;
899
900 return 0;
901}
902
903
904
905
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
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 == XFS_ITER_ABORT)
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
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 == XFS_ITER_ABORT)
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
1042 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1043 if (error)
1044 return error;
1045
1046 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1047 return -EFAULT;
1048 return 0;
1049}
1050
1051
1052
1053
1054
1055STATIC unsigned int
1056xfs_merge_ioc_xflags(
1057 unsigned int flags,
1058 unsigned int start)
1059{
1060 unsigned int xflags = start;
1061
1062 if (flags & FS_IMMUTABLE_FL)
1063 xflags |= FS_XFLAG_IMMUTABLE;
1064 else
1065 xflags &= ~FS_XFLAG_IMMUTABLE;
1066 if (flags & FS_APPEND_FL)
1067 xflags |= FS_XFLAG_APPEND;
1068 else
1069 xflags &= ~FS_XFLAG_APPEND;
1070 if (flags & FS_SYNC_FL)
1071 xflags |= FS_XFLAG_SYNC;
1072 else
1073 xflags &= ~FS_XFLAG_SYNC;
1074 if (flags & FS_NOATIME_FL)
1075 xflags |= FS_XFLAG_NOATIME;
1076 else
1077 xflags &= ~FS_XFLAG_NOATIME;
1078 if (flags & FS_NODUMP_FL)
1079 xflags |= FS_XFLAG_NODUMP;
1080 else
1081 xflags &= ~FS_XFLAG_NODUMP;
1082
1083 return xflags;
1084}
1085
1086STATIC unsigned int
1087xfs_di2lxflags(
1088 uint16_t di_flags)
1089{
1090 unsigned int flags = 0;
1091
1092 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1093 flags |= FS_IMMUTABLE_FL;
1094 if (di_flags & XFS_DIFLAG_APPEND)
1095 flags |= FS_APPEND_FL;
1096 if (di_flags & XFS_DIFLAG_SYNC)
1097 flags |= FS_SYNC_FL;
1098 if (di_flags & XFS_DIFLAG_NOATIME)
1099 flags |= FS_NOATIME_FL;
1100 if (di_flags & XFS_DIFLAG_NODUMP)
1101 flags |= FS_NODUMP_FL;
1102 return flags;
1103}
1104
1105static void
1106xfs_fill_fsxattr(
1107 struct xfs_inode *ip,
1108 bool attr,
1109 struct fsxattr *fa)
1110{
1111 simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
1112 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
1113 fa->fsx_cowextsize = ip->i_d.di_cowextsize <<
1114 ip->i_mount->m_sb.sb_blocklog;
1115 fa->fsx_projid = xfs_get_projid(ip);
1116
1117 if (attr) {
1118 if (ip->i_afp) {
1119 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
1120 fa->fsx_nextents = xfs_iext_count(ip->i_afp);
1121 else
1122 fa->fsx_nextents = ip->i_d.di_anextents;
1123 } else
1124 fa->fsx_nextents = 0;
1125 } else {
1126 if (ip->i_df.if_flags & XFS_IFEXTENTS)
1127 fa->fsx_nextents = xfs_iext_count(&ip->i_df);
1128 else
1129 fa->fsx_nextents = ip->i_d.di_nextents;
1130 }
1131}
1132
1133STATIC int
1134xfs_ioc_fsgetxattr(
1135 xfs_inode_t *ip,
1136 int attr,
1137 void __user *arg)
1138{
1139 struct fsxattr fa;
1140
1141 xfs_ilock(ip, XFS_ILOCK_SHARED);
1142 xfs_fill_fsxattr(ip, attr, &fa);
1143 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1144
1145 if (copy_to_user(arg, &fa, sizeof(fa)))
1146 return -EFAULT;
1147 return 0;
1148}
1149
1150STATIC uint16_t
1151xfs_flags2diflags(
1152 struct xfs_inode *ip,
1153 unsigned int xflags)
1154{
1155
1156 uint16_t di_flags =
1157 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
1158
1159 if (xflags & FS_XFLAG_IMMUTABLE)
1160 di_flags |= XFS_DIFLAG_IMMUTABLE;
1161 if (xflags & FS_XFLAG_APPEND)
1162 di_flags |= XFS_DIFLAG_APPEND;
1163 if (xflags & FS_XFLAG_SYNC)
1164 di_flags |= XFS_DIFLAG_SYNC;
1165 if (xflags & FS_XFLAG_NOATIME)
1166 di_flags |= XFS_DIFLAG_NOATIME;
1167 if (xflags & FS_XFLAG_NODUMP)
1168 di_flags |= XFS_DIFLAG_NODUMP;
1169 if (xflags & FS_XFLAG_NODEFRAG)
1170 di_flags |= XFS_DIFLAG_NODEFRAG;
1171 if (xflags & FS_XFLAG_FILESTREAM)
1172 di_flags |= XFS_DIFLAG_FILESTREAM;
1173 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1174 if (xflags & FS_XFLAG_RTINHERIT)
1175 di_flags |= XFS_DIFLAG_RTINHERIT;
1176 if (xflags & FS_XFLAG_NOSYMLINKS)
1177 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1178 if (xflags & FS_XFLAG_EXTSZINHERIT)
1179 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1180 if (xflags & FS_XFLAG_PROJINHERIT)
1181 di_flags |= XFS_DIFLAG_PROJINHERIT;
1182 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1183 if (xflags & FS_XFLAG_REALTIME)
1184 di_flags |= XFS_DIFLAG_REALTIME;
1185 if (xflags & FS_XFLAG_EXTSIZE)
1186 di_flags |= XFS_DIFLAG_EXTSIZE;
1187 }
1188
1189 return di_flags;
1190}
1191
1192STATIC uint64_t
1193xfs_flags2diflags2(
1194 struct xfs_inode *ip,
1195 unsigned int xflags)
1196{
1197 uint64_t di_flags2 =
1198 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
1199
1200 if (xflags & FS_XFLAG_DAX)
1201 di_flags2 |= XFS_DIFLAG2_DAX;
1202 if (xflags & FS_XFLAG_COWEXTSIZE)
1203 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1204
1205 return di_flags2;
1206}
1207
1208STATIC void
1209xfs_diflags_to_linux(
1210 struct xfs_inode *ip)
1211{
1212 struct inode *inode = VFS_I(ip);
1213 unsigned int xflags = xfs_ip2xflags(ip);
1214
1215 if (xflags & FS_XFLAG_IMMUTABLE)
1216 inode->i_flags |= S_IMMUTABLE;
1217 else
1218 inode->i_flags &= ~S_IMMUTABLE;
1219 if (xflags & FS_XFLAG_APPEND)
1220 inode->i_flags |= S_APPEND;
1221 else
1222 inode->i_flags &= ~S_APPEND;
1223 if (xflags & FS_XFLAG_SYNC)
1224 inode->i_flags |= S_SYNC;
1225 else
1226 inode->i_flags &= ~S_SYNC;
1227 if (xflags & FS_XFLAG_NOATIME)
1228 inode->i_flags |= S_NOATIME;
1229 else
1230 inode->i_flags &= ~S_NOATIME;
1231#if 0
1232 if (xflags & FS_XFLAG_DAX)
1233 inode->i_flags |= S_DAX;
1234 else
1235 inode->i_flags &= ~S_DAX;
1236#endif
1237}
1238
1239static int
1240xfs_ioctl_setattr_xflags(
1241 struct xfs_trans *tp,
1242 struct xfs_inode *ip,
1243 struct fsxattr *fa)
1244{
1245 struct xfs_mount *mp = ip->i_mount;
1246 uint64_t di_flags2;
1247
1248
1249 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1250 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1251 return -EINVAL;
1252
1253
1254 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1255 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1256 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1257 return -EINVAL;
1258 }
1259
1260
1261 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1262 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1263
1264
1265 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1266 return -EINVAL;
1267
1268
1269 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1270 if (di_flags2 && ip->i_d.di_version < 3)
1271 return -EINVAL;
1272
1273 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1274 ip->i_d.di_flags2 = di_flags2;
1275
1276 xfs_diflags_to_linux(ip);
1277 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1278 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1279 XFS_STATS_INC(mp, xs_ig_attrchg);
1280 return 0;
1281}
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291static int
1292xfs_ioctl_setattr_dax_invalidate(
1293 struct xfs_inode *ip,
1294 struct fsxattr *fa,
1295 int *join_flags)
1296{
1297 struct inode *inode = VFS_I(ip);
1298 struct super_block *sb = inode->i_sb;
1299 int error;
1300
1301 *join_flags = 0;
1302
1303
1304
1305
1306
1307
1308
1309 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1310 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1311 return -EINVAL;
1312 if (S_ISREG(inode->i_mode) &&
1313 !bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)),
1314 sb->s_blocksize))
1315 return -EINVAL;
1316 }
1317
1318
1319 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1320 return 0;
1321 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1322 return 0;
1323
1324 if (S_ISDIR(inode->i_mode))
1325 return 0;
1326
1327
1328 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1329 error = filemap_write_and_wait(inode->i_mapping);
1330 if (error)
1331 goto out_unlock;
1332 error = invalidate_inode_pages2(inode->i_mapping);
1333 if (error)
1334 goto out_unlock;
1335
1336 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1337 return 0;
1338
1339out_unlock:
1340 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1341 return error;
1342
1343}
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357static struct xfs_trans *
1358xfs_ioctl_setattr_get_trans(
1359 struct xfs_inode *ip,
1360 int join_flags)
1361{
1362 struct xfs_mount *mp = ip->i_mount;
1363 struct xfs_trans *tp;
1364 int error = -EROFS;
1365
1366 if (mp->m_flags & XFS_MOUNT_RDONLY)
1367 goto out_unlock;
1368 error = -EIO;
1369 if (XFS_FORCED_SHUTDOWN(mp))
1370 goto out_unlock;
1371
1372 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1373 if (error)
1374 goto out_unlock;
1375
1376 xfs_ilock(ip, XFS_ILOCK_EXCL);
1377 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1378 join_flags = 0;
1379
1380
1381
1382
1383
1384
1385
1386 if (!inode_owner_or_capable(VFS_I(ip))) {
1387 error = -EPERM;
1388 goto out_cancel;
1389 }
1390
1391 if (mp->m_flags & XFS_MOUNT_WSYNC)
1392 xfs_trans_set_sync(tp);
1393
1394 return tp;
1395
1396out_cancel:
1397 xfs_trans_cancel(tp);
1398out_unlock:
1399 if (join_flags)
1400 xfs_iunlock(ip, join_flags);
1401 return ERR_PTR(error);
1402}
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420static int
1421xfs_ioctl_setattr_check_extsize(
1422 struct xfs_inode *ip,
1423 struct fsxattr *fa)
1424{
1425 struct xfs_mount *mp = ip->i_mount;
1426 xfs_extlen_t size;
1427 xfs_fsblock_t extsize_fsb;
1428
1429 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1430 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1431 return -EINVAL;
1432
1433 if (fa->fsx_extsize == 0)
1434 return 0;
1435
1436 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1437 if (extsize_fsb > MAXEXTLEN)
1438 return -EINVAL;
1439
1440 if (XFS_IS_REALTIME_INODE(ip) ||
1441 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1442 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1443 } else {
1444 size = mp->m_sb.sb_blocksize;
1445 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1446 return -EINVAL;
1447 }
1448
1449 if (fa->fsx_extsize % size)
1450 return -EINVAL;
1451
1452 return 0;
1453}
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470static int
1471xfs_ioctl_setattr_check_cowextsize(
1472 struct xfs_inode *ip,
1473 struct fsxattr *fa)
1474{
1475 struct xfs_mount *mp = ip->i_mount;
1476 xfs_extlen_t size;
1477 xfs_fsblock_t cowextsize_fsb;
1478
1479 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1480 return 0;
1481
1482 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1483 ip->i_d.di_version != 3)
1484 return -EINVAL;
1485
1486 if (fa->fsx_cowextsize == 0)
1487 return 0;
1488
1489 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1490 if (cowextsize_fsb > MAXEXTLEN)
1491 return -EINVAL;
1492
1493 size = mp->m_sb.sb_blocksize;
1494 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1495 return -EINVAL;
1496
1497 if (fa->fsx_cowextsize % size)
1498 return -EINVAL;
1499
1500 return 0;
1501}
1502
1503static int
1504xfs_ioctl_setattr_check_projid(
1505 struct xfs_inode *ip,
1506 struct fsxattr *fa)
1507{
1508
1509 if (fa->fsx_projid > (uint16_t)-1 &&
1510 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1511 return -EINVAL;
1512 return 0;
1513}
1514
1515STATIC int
1516xfs_ioctl_setattr(
1517 xfs_inode_t *ip,
1518 struct fsxattr *fa)
1519{
1520 struct fsxattr old_fa;
1521 struct xfs_mount *mp = ip->i_mount;
1522 struct xfs_trans *tp;
1523 struct xfs_dquot *udqp = NULL;
1524 struct xfs_dquot *pdqp = NULL;
1525 struct xfs_dquot *olddquot = NULL;
1526 int code;
1527 int join_flags = 0;
1528
1529 trace_xfs_ioctl_setattr(ip);
1530
1531 code = xfs_ioctl_setattr_check_projid(ip, fa);
1532 if (code)
1533 return code;
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543 if (XFS_IS_QUOTA_ON(mp)) {
1544 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1545 ip->i_d.di_gid, fa->fsx_projid,
1546 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1547 if (code)
1548 return code;
1549 }
1550
1551
1552
1553
1554
1555
1556
1557
1558 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1559 if (code)
1560 goto error_free_dquots;
1561
1562 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1563 if (IS_ERR(tp)) {
1564 code = PTR_ERR(tp);
1565 goto error_free_dquots;
1566 }
1567
1568 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1569 xfs_get_projid(ip) != fa->fsx_projid) {
1570 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1571 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1572 if (code)
1573 goto error_trans_cancel;
1574 }
1575
1576 xfs_fill_fsxattr(ip, false, &old_fa);
1577 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa);
1578 if (code)
1579 goto error_trans_cancel;
1580
1581 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1582 if (code)
1583 goto error_trans_cancel;
1584
1585 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1586 if (code)
1587 goto error_trans_cancel;
1588
1589 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1590 if (code)
1591 goto error_trans_cancel;
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1602 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1603 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1604
1605
1606 if (xfs_get_projid(ip) != fa->fsx_projid) {
1607 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1608 olddquot = xfs_qm_vop_chown(tp, ip,
1609 &ip->i_pdquot, pdqp);
1610 }
1611 ASSERT(ip->i_d.di_version > 1);
1612 xfs_set_projid(ip, fa->fsx_projid);
1613 }
1614
1615
1616
1617
1618
1619
1620 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1621 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1622 else
1623 ip->i_d.di_extsize = 0;
1624 if (ip->i_d.di_version == 3 &&
1625 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1626 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1627 mp->m_sb.sb_blocklog;
1628 else
1629 ip->i_d.di_cowextsize = 0;
1630
1631 code = xfs_trans_commit(tp);
1632
1633
1634
1635
1636 xfs_qm_dqrele(olddquot);
1637 xfs_qm_dqrele(udqp);
1638 xfs_qm_dqrele(pdqp);
1639
1640 return code;
1641
1642error_trans_cancel:
1643 xfs_trans_cancel(tp);
1644error_free_dquots:
1645 xfs_qm_dqrele(udqp);
1646 xfs_qm_dqrele(pdqp);
1647 return code;
1648}
1649
1650STATIC int
1651xfs_ioc_fssetxattr(
1652 xfs_inode_t *ip,
1653 struct file *filp,
1654 void __user *arg)
1655{
1656 struct fsxattr fa;
1657 int error;
1658
1659 if (copy_from_user(&fa, arg, sizeof(fa)))
1660 return -EFAULT;
1661
1662 error = mnt_want_write_file(filp);
1663 if (error)
1664 return error;
1665 error = xfs_ioctl_setattr(ip, &fa);
1666 mnt_drop_write_file(filp);
1667 return error;
1668}
1669
1670STATIC int
1671xfs_ioc_getxflags(
1672 xfs_inode_t *ip,
1673 void __user *arg)
1674{
1675 unsigned int flags;
1676
1677 flags = xfs_di2lxflags(ip->i_d.di_flags);
1678 if (copy_to_user(arg, &flags, sizeof(flags)))
1679 return -EFAULT;
1680 return 0;
1681}
1682
1683STATIC int
1684xfs_ioc_setxflags(
1685 struct xfs_inode *ip,
1686 struct file *filp,
1687 void __user *arg)
1688{
1689 struct xfs_trans *tp;
1690 struct fsxattr fa;
1691 struct fsxattr old_fa;
1692 unsigned int flags;
1693 int join_flags = 0;
1694 int error;
1695
1696 if (copy_from_user(&flags, arg, sizeof(flags)))
1697 return -EFAULT;
1698
1699 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1700 FS_NOATIME_FL | FS_NODUMP_FL | \
1701 FS_SYNC_FL))
1702 return -EOPNOTSUPP;
1703
1704 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1705
1706 error = mnt_want_write_file(filp);
1707 if (error)
1708 return error;
1709
1710
1711
1712
1713
1714
1715
1716
1717 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1718 if (error)
1719 goto out_drop_write;
1720
1721 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1722 if (IS_ERR(tp)) {
1723 error = PTR_ERR(tp);
1724 goto out_drop_write;
1725 }
1726
1727 xfs_fill_fsxattr(ip, false, &old_fa);
1728 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa);
1729 if (error) {
1730 xfs_trans_cancel(tp);
1731 goto out_drop_write;
1732 }
1733
1734 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1735 if (error) {
1736 xfs_trans_cancel(tp);
1737 goto out_drop_write;
1738 }
1739
1740 error = xfs_trans_commit(tp);
1741out_drop_write:
1742 mnt_drop_write_file(filp);
1743 return error;
1744}
1745
1746static bool
1747xfs_getbmap_format(
1748 struct kgetbmap *p,
1749 struct getbmapx __user *u,
1750 size_t recsize)
1751{
1752 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1753 put_user(p->bmv_block, &u->bmv_block) ||
1754 put_user(p->bmv_length, &u->bmv_length) ||
1755 put_user(0, &u->bmv_count) ||
1756 put_user(0, &u->bmv_entries))
1757 return false;
1758 if (recsize < sizeof(struct getbmapx))
1759 return true;
1760 if (put_user(0, &u->bmv_iflags) ||
1761 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1762 put_user(0, &u->bmv_unused1) ||
1763 put_user(0, &u->bmv_unused2))
1764 return false;
1765 return true;
1766}
1767
1768STATIC int
1769xfs_ioc_getbmap(
1770 struct file *file,
1771 unsigned int cmd,
1772 void __user *arg)
1773{
1774 struct getbmapx bmx = { 0 };
1775 struct kgetbmap *buf;
1776 size_t recsize;
1777 int error, i;
1778
1779 switch (cmd) {
1780 case XFS_IOC_GETBMAPA:
1781 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1782
1783 case XFS_IOC_GETBMAP:
1784 if (file->f_mode & FMODE_NOCMTIME)
1785 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1786
1787 recsize = sizeof(struct getbmap);
1788 break;
1789 case XFS_IOC_GETBMAPX:
1790 recsize = sizeof(struct getbmapx);
1791 break;
1792 default:
1793 return -EINVAL;
1794 }
1795
1796 if (copy_from_user(&bmx, arg, recsize))
1797 return -EFAULT;
1798
1799 if (bmx.bmv_count < 2)
1800 return -EINVAL;
1801 if (bmx.bmv_count > ULONG_MAX / recsize)
1802 return -ENOMEM;
1803
1804 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1805 if (!buf)
1806 return -ENOMEM;
1807
1808 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1809 if (error)
1810 goto out_free_buf;
1811
1812 error = -EFAULT;
1813 if (copy_to_user(arg, &bmx, recsize))
1814 goto out_free_buf;
1815 arg += recsize;
1816
1817 for (i = 0; i < bmx.bmv_entries; i++) {
1818 if (!xfs_getbmap_format(buf + i, arg, recsize))
1819 goto out_free_buf;
1820 arg += recsize;
1821 }
1822
1823 error = 0;
1824out_free_buf:
1825 kmem_free(buf);
1826 return error;
1827}
1828
1829struct getfsmap_info {
1830 struct xfs_mount *mp;
1831 struct fsmap_head __user *data;
1832 unsigned int idx;
1833 __u32 last_flags;
1834};
1835
1836STATIC int
1837xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1838{
1839 struct getfsmap_info *info = priv;
1840 struct fsmap fm;
1841
1842 trace_xfs_getfsmap_mapping(info->mp, xfm);
1843
1844 info->last_flags = xfm->fmr_flags;
1845 xfs_fsmap_from_internal(&fm, xfm);
1846 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1847 sizeof(struct fsmap)))
1848 return -EFAULT;
1849
1850 return 0;
1851}
1852
1853STATIC int
1854xfs_ioc_getfsmap(
1855 struct xfs_inode *ip,
1856 struct fsmap_head __user *arg)
1857{
1858 struct getfsmap_info info = { NULL };
1859 struct xfs_fsmap_head xhead = {0};
1860 struct fsmap_head head;
1861 bool aborted = false;
1862 int error;
1863
1864 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1865 return -EFAULT;
1866 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1867 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1868 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1869 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1870 sizeof(head.fmh_keys[1].fmr_reserved)))
1871 return -EINVAL;
1872
1873 xhead.fmh_iflags = head.fmh_iflags;
1874 xhead.fmh_count = head.fmh_count;
1875 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1876 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1877
1878 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1879 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1880
1881 info.mp = ip->i_mount;
1882 info.data = arg;
1883 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1884 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1885 error = 0;
1886 aborted = true;
1887 } else if (error)
1888 return error;
1889
1890
1891 if (!aborted && info.idx) {
1892 info.last_flags |= FMR_OF_LAST;
1893 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1894 &info.last_flags, sizeof(info.last_flags)))
1895 return -EFAULT;
1896 }
1897
1898
1899 head.fmh_entries = xhead.fmh_entries;
1900 head.fmh_oflags = xhead.fmh_oflags;
1901 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1902 return -EFAULT;
1903
1904 return 0;
1905}
1906
1907STATIC int
1908xfs_ioc_scrub_metadata(
1909 struct xfs_inode *ip,
1910 void __user *arg)
1911{
1912 struct xfs_scrub_metadata scrub;
1913 int error;
1914
1915 if (!capable(CAP_SYS_ADMIN))
1916 return -EPERM;
1917
1918 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1919 return -EFAULT;
1920
1921 error = xfs_scrub_metadata(ip, &scrub);
1922 if (error)
1923 return error;
1924
1925 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1926 return -EFAULT;
1927
1928 return 0;
1929}
1930
1931int
1932xfs_ioc_swapext(
1933 xfs_swapext_t *sxp)
1934{
1935 xfs_inode_t *ip, *tip;
1936 struct fd f, tmp;
1937 int error = 0;
1938
1939
1940 f = fdget((int)sxp->sx_fdtarget);
1941 if (!f.file) {
1942 error = -EINVAL;
1943 goto out;
1944 }
1945
1946 if (!(f.file->f_mode & FMODE_WRITE) ||
1947 !(f.file->f_mode & FMODE_READ) ||
1948 (f.file->f_flags & O_APPEND)) {
1949 error = -EBADF;
1950 goto out_put_file;
1951 }
1952
1953 tmp = fdget((int)sxp->sx_fdtmp);
1954 if (!tmp.file) {
1955 error = -EINVAL;
1956 goto out_put_file;
1957 }
1958
1959 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1960 !(tmp.file->f_mode & FMODE_READ) ||
1961 (tmp.file->f_flags & O_APPEND)) {
1962 error = -EBADF;
1963 goto out_put_tmp_file;
1964 }
1965
1966 if (IS_SWAPFILE(file_inode(f.file)) ||
1967 IS_SWAPFILE(file_inode(tmp.file))) {
1968 error = -EINVAL;
1969 goto out_put_tmp_file;
1970 }
1971
1972
1973
1974
1975
1976
1977 if (f.file->f_op != &xfs_file_operations ||
1978 tmp.file->f_op != &xfs_file_operations) {
1979 error = -EINVAL;
1980 goto out_put_tmp_file;
1981 }
1982
1983 ip = XFS_I(file_inode(f.file));
1984 tip = XFS_I(file_inode(tmp.file));
1985
1986 if (ip->i_mount != tip->i_mount) {
1987 error = -EINVAL;
1988 goto out_put_tmp_file;
1989 }
1990
1991 if (ip->i_ino == tip->i_ino) {
1992 error = -EINVAL;
1993 goto out_put_tmp_file;
1994 }
1995
1996 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1997 error = -EIO;
1998 goto out_put_tmp_file;
1999 }
2000
2001 error = xfs_swap_extents(ip, tip, sxp);
2002
2003 out_put_tmp_file:
2004 fdput(tmp);
2005 out_put_file:
2006 fdput(f);
2007 out:
2008 return error;
2009}
2010
2011static int
2012xfs_ioc_getlabel(
2013 struct xfs_mount *mp,
2014 char __user *user_label)
2015{
2016 struct xfs_sb *sbp = &mp->m_sb;
2017 char label[XFSLABEL_MAX + 1];
2018
2019
2020 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
2021
2022
2023 memset(label, 0, sizeof(label));
2024 spin_lock(&mp->m_sb_lock);
2025 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
2026 spin_unlock(&mp->m_sb_lock);
2027
2028 if (copy_to_user(user_label, label, sizeof(label)))
2029 return -EFAULT;
2030 return 0;
2031}
2032
2033static int
2034xfs_ioc_setlabel(
2035 struct file *filp,
2036 struct xfs_mount *mp,
2037 char __user *newlabel)
2038{
2039 struct xfs_sb *sbp = &mp->m_sb;
2040 char label[XFSLABEL_MAX + 1];
2041 size_t len;
2042 int error;
2043
2044 if (!capable(CAP_SYS_ADMIN))
2045 return -EPERM;
2046
2047
2048
2049
2050
2051
2052 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
2053 return -EFAULT;
2054 len = strnlen(label, XFSLABEL_MAX + 1);
2055 if (len > sizeof(sbp->sb_fname))
2056 return -EINVAL;
2057
2058 error = mnt_want_write_file(filp);
2059 if (error)
2060 return error;
2061
2062 spin_lock(&mp->m_sb_lock);
2063 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
2064 memcpy(sbp->sb_fname, label, len);
2065 spin_unlock(&mp->m_sb_lock);
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076 error = xfs_sync_sb_buf(mp);
2077 if (error)
2078 goto out;
2079
2080
2081
2082 mutex_lock(&mp->m_growlock);
2083 error = xfs_update_secondary_sbs(mp);
2084 mutex_unlock(&mp->m_growlock);
2085
2086 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
2087
2088out:
2089 mnt_drop_write_file(filp);
2090 return error;
2091}
2092
2093
2094
2095
2096
2097
2098
2099long
2100xfs_file_ioctl(
2101 struct file *filp,
2102 unsigned int cmd,
2103 unsigned long p)
2104{
2105 struct inode *inode = file_inode(filp);
2106 struct xfs_inode *ip = XFS_I(inode);
2107 struct xfs_mount *mp = ip->i_mount;
2108 void __user *arg = (void __user *)p;
2109 int error;
2110
2111 trace_xfs_file_ioctl(ip);
2112
2113 switch (cmd) {
2114 case FITRIM:
2115 return xfs_ioc_trim(mp, arg);
2116 case FS_IOC_GETFSLABEL:
2117 return xfs_ioc_getlabel(mp, arg);
2118 case FS_IOC_SETFSLABEL:
2119 return xfs_ioc_setlabel(filp, mp, arg);
2120 case XFS_IOC_ALLOCSP:
2121 case XFS_IOC_FREESP:
2122 case XFS_IOC_RESVSP:
2123 case XFS_IOC_UNRESVSP:
2124 case XFS_IOC_ALLOCSP64:
2125 case XFS_IOC_FREESP64:
2126 case XFS_IOC_RESVSP64:
2127 case XFS_IOC_UNRESVSP64:
2128 case XFS_IOC_ZERO_RANGE: {
2129 xfs_flock64_t bf;
2130
2131 if (copy_from_user(&bf, arg, sizeof(bf)))
2132 return -EFAULT;
2133 return xfs_ioc_space(filp, cmd, &bf);
2134 }
2135 case XFS_IOC_DIOINFO: {
2136 struct dioattr da;
2137 xfs_buftarg_t *target =
2138 XFS_IS_REALTIME_INODE(ip) ?
2139 mp->m_rtdev_targp : mp->m_ddev_targp;
2140
2141 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
2142 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
2143
2144 if (copy_to_user(arg, &da, sizeof(da)))
2145 return -EFAULT;
2146 return 0;
2147 }
2148
2149 case XFS_IOC_FSBULKSTAT_SINGLE:
2150 case XFS_IOC_FSBULKSTAT:
2151 case XFS_IOC_FSINUMBERS:
2152 return xfs_ioc_fsbulkstat(mp, cmd, arg);
2153
2154 case XFS_IOC_BULKSTAT:
2155 return xfs_ioc_bulkstat(mp, cmd, arg);
2156 case XFS_IOC_INUMBERS:
2157 return xfs_ioc_inumbers(mp, cmd, arg);
2158
2159 case XFS_IOC_FSGEOMETRY_V1:
2160 return xfs_ioc_fsgeometry(mp, arg, 3);
2161 case XFS_IOC_FSGEOMETRY_V4:
2162 return xfs_ioc_fsgeometry(mp, arg, 4);
2163 case XFS_IOC_FSGEOMETRY:
2164 return xfs_ioc_fsgeometry(mp, arg, 5);
2165
2166 case XFS_IOC_AG_GEOMETRY:
2167 return xfs_ioc_ag_geometry(mp, arg);
2168
2169 case XFS_IOC_GETVERSION:
2170 return put_user(inode->i_generation, (int __user *)arg);
2171
2172 case XFS_IOC_FSGETXATTR:
2173 return xfs_ioc_fsgetxattr(ip, 0, arg);
2174 case XFS_IOC_FSGETXATTRA:
2175 return xfs_ioc_fsgetxattr(ip, 1, arg);
2176 case XFS_IOC_FSSETXATTR:
2177 return xfs_ioc_fssetxattr(ip, filp, arg);
2178 case XFS_IOC_GETXFLAGS:
2179 return xfs_ioc_getxflags(ip, arg);
2180 case XFS_IOC_SETXFLAGS:
2181 return xfs_ioc_setxflags(ip, filp, arg);
2182
2183 case XFS_IOC_FSSETDM: {
2184 struct fsdmidata dmi;
2185
2186 if (copy_from_user(&dmi, arg, sizeof(dmi)))
2187 return -EFAULT;
2188
2189 error = mnt_want_write_file(filp);
2190 if (error)
2191 return error;
2192
2193 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
2194 dmi.fsd_dmstate);
2195 mnt_drop_write_file(filp);
2196 return error;
2197 }
2198
2199 case XFS_IOC_GETBMAP:
2200 case XFS_IOC_GETBMAPA:
2201 case XFS_IOC_GETBMAPX:
2202 return xfs_ioc_getbmap(filp, cmd, arg);
2203
2204 case FS_IOC_GETFSMAP:
2205 return xfs_ioc_getfsmap(ip, arg);
2206
2207 case XFS_IOC_SCRUB_METADATA:
2208 return xfs_ioc_scrub_metadata(ip, arg);
2209
2210 case XFS_IOC_FD_TO_HANDLE:
2211 case XFS_IOC_PATH_TO_HANDLE:
2212 case XFS_IOC_PATH_TO_FSHANDLE: {
2213 xfs_fsop_handlereq_t hreq;
2214
2215 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2216 return -EFAULT;
2217 return xfs_find_handle(cmd, &hreq);
2218 }
2219 case XFS_IOC_OPEN_BY_HANDLE: {
2220 xfs_fsop_handlereq_t hreq;
2221
2222 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2223 return -EFAULT;
2224 return xfs_open_by_handle(filp, &hreq);
2225 }
2226 case XFS_IOC_FSSETDM_BY_HANDLE:
2227 return xfs_fssetdm_by_handle(filp, arg);
2228
2229 case XFS_IOC_READLINK_BY_HANDLE: {
2230 xfs_fsop_handlereq_t hreq;
2231
2232 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2233 return -EFAULT;
2234 return xfs_readlink_by_handle(filp, &hreq);
2235 }
2236 case XFS_IOC_ATTRLIST_BY_HANDLE:
2237 return xfs_attrlist_by_handle(filp, arg);
2238
2239 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2240 return xfs_attrmulti_by_handle(filp, arg);
2241
2242 case XFS_IOC_SWAPEXT: {
2243 struct xfs_swapext sxp;
2244
2245 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2246 return -EFAULT;
2247 error = mnt_want_write_file(filp);
2248 if (error)
2249 return error;
2250 error = xfs_ioc_swapext(&sxp);
2251 mnt_drop_write_file(filp);
2252 return error;
2253 }
2254
2255 case XFS_IOC_FSCOUNTS: {
2256 xfs_fsop_counts_t out;
2257
2258 xfs_fs_counts(mp, &out);
2259
2260 if (copy_to_user(arg, &out, sizeof(out)))
2261 return -EFAULT;
2262 return 0;
2263 }
2264
2265 case XFS_IOC_SET_RESBLKS: {
2266 xfs_fsop_resblks_t inout;
2267 uint64_t in;
2268
2269 if (!capable(CAP_SYS_ADMIN))
2270 return -EPERM;
2271
2272 if (mp->m_flags & XFS_MOUNT_RDONLY)
2273 return -EROFS;
2274
2275 if (copy_from_user(&inout, arg, sizeof(inout)))
2276 return -EFAULT;
2277
2278 error = mnt_want_write_file(filp);
2279 if (error)
2280 return error;
2281
2282
2283 in = inout.resblks;
2284 error = xfs_reserve_blocks(mp, &in, &inout);
2285 mnt_drop_write_file(filp);
2286 if (error)
2287 return error;
2288
2289 if (copy_to_user(arg, &inout, sizeof(inout)))
2290 return -EFAULT;
2291 return 0;
2292 }
2293
2294 case XFS_IOC_GET_RESBLKS: {
2295 xfs_fsop_resblks_t out;
2296
2297 if (!capable(CAP_SYS_ADMIN))
2298 return -EPERM;
2299
2300 error = xfs_reserve_blocks(mp, NULL, &out);
2301 if (error)
2302 return error;
2303
2304 if (copy_to_user(arg, &out, sizeof(out)))
2305 return -EFAULT;
2306
2307 return 0;
2308 }
2309
2310 case XFS_IOC_FSGROWFSDATA: {
2311 xfs_growfs_data_t in;
2312
2313 if (copy_from_user(&in, arg, sizeof(in)))
2314 return -EFAULT;
2315
2316 error = mnt_want_write_file(filp);
2317 if (error)
2318 return error;
2319 error = xfs_growfs_data(mp, &in);
2320 mnt_drop_write_file(filp);
2321 return error;
2322 }
2323
2324 case XFS_IOC_FSGROWFSLOG: {
2325 xfs_growfs_log_t in;
2326
2327 if (copy_from_user(&in, arg, sizeof(in)))
2328 return -EFAULT;
2329
2330 error = mnt_want_write_file(filp);
2331 if (error)
2332 return error;
2333 error = xfs_growfs_log(mp, &in);
2334 mnt_drop_write_file(filp);
2335 return error;
2336 }
2337
2338 case XFS_IOC_FSGROWFSRT: {
2339 xfs_growfs_rt_t in;
2340
2341 if (copy_from_user(&in, arg, sizeof(in)))
2342 return -EFAULT;
2343
2344 error = mnt_want_write_file(filp);
2345 if (error)
2346 return error;
2347 error = xfs_growfs_rt(mp, &in);
2348 mnt_drop_write_file(filp);
2349 return error;
2350 }
2351
2352 case XFS_IOC_GOINGDOWN: {
2353 uint32_t in;
2354
2355 if (!capable(CAP_SYS_ADMIN))
2356 return -EPERM;
2357
2358 if (get_user(in, (uint32_t __user *)arg))
2359 return -EFAULT;
2360
2361 return xfs_fs_goingdown(mp, in);
2362 }
2363
2364 case XFS_IOC_ERROR_INJECTION: {
2365 xfs_error_injection_t in;
2366
2367 if (!capable(CAP_SYS_ADMIN))
2368 return -EPERM;
2369
2370 if (copy_from_user(&in, arg, sizeof(in)))
2371 return -EFAULT;
2372
2373 return xfs_errortag_add(mp, in.errtag);
2374 }
2375
2376 case XFS_IOC_ERROR_CLEARALL:
2377 if (!capable(CAP_SYS_ADMIN))
2378 return -EPERM;
2379
2380 return xfs_errortag_clearall(mp);
2381
2382 case XFS_IOC_FREE_EOFBLOCKS: {
2383 struct xfs_fs_eofblocks eofb;
2384 struct xfs_eofblocks keofb;
2385
2386 if (!capable(CAP_SYS_ADMIN))
2387 return -EPERM;
2388
2389 if (mp->m_flags & XFS_MOUNT_RDONLY)
2390 return -EROFS;
2391
2392 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2393 return -EFAULT;
2394
2395 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2396 if (error)
2397 return error;
2398
2399 return xfs_icache_free_eofblocks(mp, &keofb);
2400 }
2401
2402 default:
2403 return -ENOTTY;
2404 }
2405}
2406