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Linux 4.8.3
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blob96a70fd1f5d6735b514f008bd165cf032bf7fd86
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 */
64 int
65 xfs_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 */
142 STATIC int
143 xfs_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 */
153 struct dentry *
154 xfs_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
185 STATIC struct dentry *
186 xfs_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
193 int
194 xfs_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
273 int
274 xfs_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_inode(dentry)->i_op->readlink) {
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 = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen);
301
302 out_dput:
303 dput(dentry);
304 return error;
305 }
306
307 int
308 xfs_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
339 STATIC int
340 xfs_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
383 STATIC int
384 xfs_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
431 out_kfree:
432 kmem_free(kbuf);
433 out_dput:
434 dput(dentry);
435 return error;
436 }
437
438 int
439 xfs_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
462 out_kfree:
463 kmem_free(kbuf);
464 return error;
465 }
466
467 int
468 xfs_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
494 int
495 xfs_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
510 STATIC int
511 xfs_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
602 int
603 xfs_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, false);
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_setattr_size(ip, &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
735 out_unlock:
736 xfs_iunlock(ip, iolock);
737 mnt_drop_write_file(filp);
738 return error;
739 }
740
741 STATIC int
742 xfs_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
800 STATIC int
801 xfs_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
822 STATIC int
823 xfs_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
843 STATIC unsigned int
844 xfs_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
874 STATIC unsigned int
875 xfs_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
893 STATIC int
894 xfs_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_projid = xfs_get_projid(ip);
907
908 if (attr) {
909 if (ip->i_afp) {
910 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
911 fa.fsx_nextents = ip->i_afp->if_bytes /
912 sizeof(xfs_bmbt_rec_t);
913 else
914 fa.fsx_nextents = ip->i_d.di_anextents;
915 } else
916 fa.fsx_nextents = 0;
917 } else {
918 if (ip->i_df.if_flags & XFS_IFEXTENTS)
919 fa.fsx_nextents = ip->i_df.if_bytes /
920 sizeof(xfs_bmbt_rec_t);
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
931 STATIC void
932 xfs_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 = 0;
977 if (xflags & FS_XFLAG_DAX)
978 di_flags2 |= XFS_DIFLAG2_DAX;
979
980 ip->i_d.di_flags2 = di_flags2;
981
982 }
983
984 STATIC void
985 xfs_diflags_to_linux(
986 struct xfs_inode *ip)
987 {
988 struct inode *inode = VFS_I(ip);
989 unsigned int xflags = xfs_ip2xflags(ip);
990
991 if (xflags & FS_XFLAG_IMMUTABLE)
992 inode->i_flags |= S_IMMUTABLE;
993 else
994 inode->i_flags &= ~S_IMMUTABLE;
995 if (xflags & FS_XFLAG_APPEND)
996 inode->i_flags |= S_APPEND;
997 else
998 inode->i_flags &= ~S_APPEND;
999 if (xflags & FS_XFLAG_SYNC)
1000 inode->i_flags |= S_SYNC;
1001 else
1002 inode->i_flags &= ~S_SYNC;
1003 if (xflags & FS_XFLAG_NOATIME)
1004 inode->i_flags |= S_NOATIME;
1005 else
1006 inode->i_flags &= ~S_NOATIME;
1007 if (xflags & FS_XFLAG_DAX)
1008 inode->i_flags |= S_DAX;
1009 else
1010 inode->i_flags &= ~S_DAX;
1011
1012 }
1013
1014 static int
1015 xfs_ioctl_setattr_xflags(
1016 struct xfs_trans *tp,
1017 struct xfs_inode *ip,
1018 struct fsxattr *fa)
1019 {
1020 struct xfs_mount *mp = ip->i_mount;
1021
1022 /* Can't change realtime flag if any extents are allocated. */
1023 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1024 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1025 return -EINVAL;
1026
1027 /* If realtime flag is set then must have realtime device */
1028 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1029 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1030 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1031 return -EINVAL;
1032 }
1033
1034 /*
1035 * Can't modify an immutable/append-only file unless
1036 * we have appropriate permission.
1037 */
1038 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1039 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1040 !capable(CAP_LINUX_IMMUTABLE))
1041 return -EPERM;
1042
1043 xfs_set_diflags(ip, fa->fsx_xflags);
1044 xfs_diflags_to_linux(ip);
1045 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1046 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1047 XFS_STATS_INC(mp, xs_ig_attrchg);
1048 return 0;
1049 }
1050
1051 /*
1052 * If we are changing DAX flags, we have to ensure the file is clean and any
1053 * cached objects in the address space are invalidated and removed. This
1054 * requires us to lock out other IO and page faults similar to a truncate
1055 * operation. The locks need to be held until the transaction has been committed
1056 * so that the cache invalidation is atomic with respect to the DAX flag
1057 * manipulation.
1058 */
1059 static int
1060 xfs_ioctl_setattr_dax_invalidate(
1061 struct xfs_inode *ip,
1062 struct fsxattr *fa,
1063 int *join_flags)
1064 {
1065 struct inode *inode = VFS_I(ip);
1066 int error;
1067
1068 *join_flags = 0;
1069
1070 /*
1071 * It is only valid to set the DAX flag on regular files and
1072 * directories on filesystems where the block size is equal to the page
1073 * size. On directories it serves as an inherit hint.
1074 */
1075 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1076 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1077 return -EINVAL;
1078 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1079 return -EINVAL;
1080 }
1081
1082 /* If the DAX state is not changing, we have nothing to do here. */
1083 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1084 return 0;
1085 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1086 return 0;
1087
1088 /* lock, flush and invalidate mapping in preparation for flag change */
1089 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1090 error = filemap_write_and_wait(inode->i_mapping);
1091 if (error)
1092 goto out_unlock;
1093 error = invalidate_inode_pages2(inode->i_mapping);
1094 if (error)
1095 goto out_unlock;
1096
1097 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1098 return 0;
1099
1100 out_unlock:
1101 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1102 return error;
1103
1104 }
1105
1106 /*
1107 * Set up the transaction structure for the setattr operation, checking that we
1108 * have permission to do so. On success, return a clean transaction and the
1109 * inode locked exclusively ready for further operation specific checks. On
1110 * failure, return an error without modifying or locking the inode.
1111 *
1112 * The inode might already be IO locked on call. If this is the case, it is
1113 * indicated in @join_flags and we take full responsibility for ensuring they
1114 * are unlocked from now on. Hence if we have an error here, we still have to
1115 * unlock them. Otherwise, once they are joined to the transaction, they will
1116 * be unlocked on commit/cancel.
1117 */
1118 static struct xfs_trans *
1119 xfs_ioctl_setattr_get_trans(
1120 struct xfs_inode *ip,
1121 int join_flags)
1122 {
1123 struct xfs_mount *mp = ip->i_mount;
1124 struct xfs_trans *tp;
1125 int error = -EROFS;
1126
1127 if (mp->m_flags & XFS_MOUNT_RDONLY)
1128 goto out_unlock;
1129 error = -EIO;
1130 if (XFS_FORCED_SHUTDOWN(mp))
1131 goto out_unlock;
1132
1133 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1134 if (error)
1135 return ERR_PTR(error);
1136
1137 xfs_ilock(ip, XFS_ILOCK_EXCL);
1138 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1139 join_flags = 0;
1140
1141 /*
1142 * CAP_FOWNER overrides the following restrictions:
1143 *
1144 * The user ID of the calling process must be equal to the file owner
1145 * ID, except in cases where the CAP_FSETID capability is applicable.
1146 */
1147 if (!inode_owner_or_capable(VFS_I(ip))) {
1148 error = -EPERM;
1149 goto out_cancel;
1150 }
1151
1152 if (mp->m_flags & XFS_MOUNT_WSYNC)
1153 xfs_trans_set_sync(tp);
1154
1155 return tp;
1156
1157 out_cancel:
1158 xfs_trans_cancel(tp);
1159 out_unlock:
1160 if (join_flags)
1161 xfs_iunlock(ip, join_flags);
1162 return ERR_PTR(error);
1163 }
1164
1165 /*
1166 * extent size hint validation is somewhat cumbersome. Rules are:
1167 *
1168 * 1. extent size hint is only valid for directories and regular files
1169 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1170 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1171 * 4. can only be changed on regular files if no extents are allocated
1172 * 5. can be changed on directories at any time
1173 * 6. extsize hint of 0 turns off hints, clears inode flags.
1174 * 7. Extent size must be a multiple of the appropriate block size.
1175 * 8. for non-realtime files, the extent size hint must be limited
1176 * to half the AG size to avoid alignment extending the extent beyond the
1177 * limits of the AG.
1178 */
1179 static int
1180 xfs_ioctl_setattr_check_extsize(
1181 struct xfs_inode *ip,
1182 struct fsxattr *fa)
1183 {
1184 struct xfs_mount *mp = ip->i_mount;
1185
1186 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1187 return -EINVAL;
1188
1189 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1190 !S_ISDIR(VFS_I(ip)->i_mode))
1191 return -EINVAL;
1192
1193 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1194 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1195 return -EINVAL;
1196
1197 if (fa->fsx_extsize != 0) {
1198 xfs_extlen_t size;
1199 xfs_fsblock_t extsize_fsb;
1200
1201 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1202 if (extsize_fsb > MAXEXTLEN)
1203 return -EINVAL;
1204
1205 if (XFS_IS_REALTIME_INODE(ip) ||
1206 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1207 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1208 } else {
1209 size = mp->m_sb.sb_blocksize;
1210 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1211 return -EINVAL;
1212 }
1213
1214 if (fa->fsx_extsize % size)
1215 return -EINVAL;
1216 } else
1217 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1218
1219 return 0;
1220 }
1221
1222 static int
1223 xfs_ioctl_setattr_check_projid(
1224 struct xfs_inode *ip,
1225 struct fsxattr *fa)
1226 {
1227 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1228 if (fa->fsx_projid > (__uint16_t)-1 &&
1229 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1230 return -EINVAL;
1231
1232 /*
1233 * Project Quota ID state is only allowed to change from within the init
1234 * namespace. Enforce that restriction only if we are trying to change
1235 * the quota ID state. Everything else is allowed in user namespaces.
1236 */
1237 if (current_user_ns() == &init_user_ns)
1238 return 0;
1239
1240 if (xfs_get_projid(ip) != fa->fsx_projid)
1241 return -EINVAL;
1242 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1243 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1244 return -EINVAL;
1245
1246 return 0;
1247 }
1248
1249 STATIC int
1250 xfs_ioctl_setattr(
1251 xfs_inode_t *ip,
1252 struct fsxattr *fa)
1253 {
1254 struct xfs_mount *mp = ip->i_mount;
1255 struct xfs_trans *tp;
1256 struct xfs_dquot *udqp = NULL;
1257 struct xfs_dquot *pdqp = NULL;
1258 struct xfs_dquot *olddquot = NULL;
1259 int code;
1260 int join_flags = 0;
1261
1262 trace_xfs_ioctl_setattr(ip);
1263
1264 code = xfs_ioctl_setattr_check_projid(ip, fa);
1265 if (code)
1266 return code;
1267
1268 /*
1269 * If disk quotas is on, we make sure that the dquots do exist on disk,
1270 * before we start any other transactions. Trying to do this later
1271 * is messy. We don't care to take a readlock to look at the ids
1272 * in inode here, because we can't hold it across the trans_reserve.
1273 * If the IDs do change before we take the ilock, we're covered
1274 * because the i_*dquot fields will get updated anyway.
1275 */
1276 if (XFS_IS_QUOTA_ON(mp)) {
1277 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1278 ip->i_d.di_gid, fa->fsx_projid,
1279 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1280 if (code)
1281 return code;
1282 }
1283
1284 /*
1285 * Changing DAX config may require inode locking for mapping
1286 * invalidation. These need to be held all the way to transaction commit
1287 * or cancel time, so need to be passed through to
1288 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1289 * appropriately.
1290 */
1291 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1292 if (code)
1293 goto error_free_dquots;
1294
1295 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1296 if (IS_ERR(tp)) {
1297 code = PTR_ERR(tp);
1298 goto error_free_dquots;
1299 }
1300
1301
1302 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1303 xfs_get_projid(ip) != fa->fsx_projid) {
1304 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1305 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1306 if (code) /* out of quota */
1307 goto error_trans_cancel;
1308 }
1309
1310 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1311 if (code)
1312 goto error_trans_cancel;
1313
1314 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1315 if (code)
1316 goto error_trans_cancel;
1317
1318 /*
1319 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1320 * overrides the following restrictions:
1321 *
1322 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1323 * successful return from chown()
1324 */
1325
1326 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1327 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1328 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1329
1330 /* Change the ownerships and register project quota modifications */
1331 if (xfs_get_projid(ip) != fa->fsx_projid) {
1332 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1333 olddquot = xfs_qm_vop_chown(tp, ip,
1334 &ip->i_pdquot, pdqp);
1335 }
1336 ASSERT(ip->i_d.di_version > 1);
1337 xfs_set_projid(ip, fa->fsx_projid);
1338 }
1339
1340 /*
1341 * Only set the extent size hint if we've already determined that the
1342 * extent size hint should be set on the inode. If no extent size flags
1343 * are set on the inode then unconditionally clear the extent size hint.
1344 */
1345 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1346 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1347 else
1348 ip->i_d.di_extsize = 0;
1349
1350 code = xfs_trans_commit(tp);
1351
1352 /*
1353 * Release any dquot(s) the inode had kept before chown.
1354 */
1355 xfs_qm_dqrele(olddquot);
1356 xfs_qm_dqrele(udqp);
1357 xfs_qm_dqrele(pdqp);
1358
1359 return code;
1360
1361 error_trans_cancel:
1362 xfs_trans_cancel(tp);
1363 error_free_dquots:
1364 xfs_qm_dqrele(udqp);
1365 xfs_qm_dqrele(pdqp);
1366 return code;
1367 }
1368
1369 STATIC int
1370 xfs_ioc_fssetxattr(
1371 xfs_inode_t *ip,
1372 struct file *filp,
1373 void __user *arg)
1374 {
1375 struct fsxattr fa;
1376 int error;
1377
1378 if (copy_from_user(&fa, arg, sizeof(fa)))
1379 return -EFAULT;
1380
1381 error = mnt_want_write_file(filp);
1382 if (error)
1383 return error;
1384 error = xfs_ioctl_setattr(ip, &fa);
1385 mnt_drop_write_file(filp);
1386 return error;
1387 }
1388
1389 STATIC int
1390 xfs_ioc_getxflags(
1391 xfs_inode_t *ip,
1392 void __user *arg)
1393 {
1394 unsigned int flags;
1395
1396 flags = xfs_di2lxflags(ip->i_d.di_flags);
1397 if (copy_to_user(arg, &flags, sizeof(flags)))
1398 return -EFAULT;
1399 return 0;
1400 }
1401
1402 STATIC int
1403 xfs_ioc_setxflags(
1404 struct xfs_inode *ip,
1405 struct file *filp,
1406 void __user *arg)
1407 {
1408 struct xfs_trans *tp;
1409 struct fsxattr fa;
1410 unsigned int flags;
1411 int join_flags = 0;
1412 int error;
1413
1414 if (copy_from_user(&flags, arg, sizeof(flags)))
1415 return -EFAULT;
1416
1417 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1418 FS_NOATIME_FL | FS_NODUMP_FL | \
1419 FS_SYNC_FL))
1420 return -EOPNOTSUPP;
1421
1422 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1423
1424 error = mnt_want_write_file(filp);
1425 if (error)
1426 return error;
1427
1428 /*
1429 * Changing DAX config may require inode locking for mapping
1430 * invalidation. These need to be held all the way to transaction commit
1431 * or cancel time, so need to be passed through to
1432 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1433 * appropriately.
1434 */
1435 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1436 if (error)
1437 goto out_drop_write;
1438
1439 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1440 if (IS_ERR(tp)) {
1441 error = PTR_ERR(tp);
1442 goto out_drop_write;
1443 }
1444
1445 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1446 if (error) {
1447 xfs_trans_cancel(tp);
1448 goto out_drop_write;
1449 }
1450
1451 error = xfs_trans_commit(tp);
1452 out_drop_write:
1453 mnt_drop_write_file(filp);
1454 return error;
1455 }
1456
1457 STATIC int
1458 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1459 {
1460 struct getbmap __user *base = (struct getbmap __user *)*ap;
1461
1462 /* copy only getbmap portion (not getbmapx) */
1463 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1464 return -EFAULT;
1465
1466 *ap += sizeof(struct getbmap);
1467 return 0;
1468 }
1469
1470 STATIC int
1471 xfs_ioc_getbmap(
1472 struct file *file,
1473 unsigned int cmd,
1474 void __user *arg)
1475 {
1476 struct getbmapx bmx;
1477 int error;
1478
1479 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1480 return -EFAULT;
1481
1482 if (bmx.bmv_count < 2)
1483 return -EINVAL;
1484
1485 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1486 if (file->f_mode & FMODE_NOCMTIME)
1487 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1488
1489 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
1490 (__force struct getbmap *)arg+1);
1491 if (error)
1492 return error;
1493
1494 /* copy back header - only size of getbmap */
1495 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1496 return -EFAULT;
1497 return 0;
1498 }
1499
1500 STATIC int
1501 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1502 {
1503 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1504
1505 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1506 return -EFAULT;
1507
1508 *ap += sizeof(struct getbmapx);
1509 return 0;
1510 }
1511
1512 STATIC int
1513 xfs_ioc_getbmapx(
1514 struct xfs_inode *ip,
1515 void __user *arg)
1516 {
1517 struct getbmapx bmx;
1518 int error;
1519
1520 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1521 return -EFAULT;
1522
1523 if (bmx.bmv_count < 2)
1524 return -EINVAL;
1525
1526 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1527 return -EINVAL;
1528
1529 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1530 (__force struct getbmapx *)arg+1);
1531 if (error)
1532 return error;
1533
1534 /* copy back header */
1535 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1536 return -EFAULT;
1537
1538 return 0;
1539 }
1540
1541 int
1542 xfs_ioc_swapext(
1543 xfs_swapext_t *sxp)
1544 {
1545 xfs_inode_t *ip, *tip;
1546 struct fd f, tmp;
1547 int error = 0;
1548
1549 /* Pull information for the target fd */
1550 f = fdget((int)sxp->sx_fdtarget);
1551 if (!f.file) {
1552 error = -EINVAL;
1553 goto out;
1554 }
1555
1556 if (!(f.file->f_mode & FMODE_WRITE) ||
1557 !(f.file->f_mode & FMODE_READ) ||
1558 (f.file->f_flags & O_APPEND)) {
1559 error = -EBADF;
1560 goto out_put_file;
1561 }
1562
1563 tmp = fdget((int)sxp->sx_fdtmp);
1564 if (!tmp.file) {
1565 error = -EINVAL;
1566 goto out_put_file;
1567 }
1568
1569 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1570 !(tmp.file->f_mode & FMODE_READ) ||
1571 (tmp.file->f_flags & O_APPEND)) {
1572 error = -EBADF;
1573 goto out_put_tmp_file;
1574 }
1575
1576 if (IS_SWAPFILE(file_inode(f.file)) ||
1577 IS_SWAPFILE(file_inode(tmp.file))) {
1578 error = -EINVAL;
1579 goto out_put_tmp_file;
1580 }
1581
1582 /*
1583 * We need to ensure that the fds passed in point to XFS inodes
1584 * before we cast and access them as XFS structures as we have no
1585 * control over what the user passes us here.
1586 */
1587 if (f.file->f_op != &xfs_file_operations ||
1588 tmp.file->f_op != &xfs_file_operations) {
1589 error = -EINVAL;
1590 goto out_put_tmp_file;
1591 }
1592
1593 ip = XFS_I(file_inode(f.file));
1594 tip = XFS_I(file_inode(tmp.file));
1595
1596 if (ip->i_mount != tip->i_mount) {
1597 error = -EINVAL;
1598 goto out_put_tmp_file;
1599 }
1600
1601 if (ip->i_ino == tip->i_ino) {
1602 error = -EINVAL;
1603 goto out_put_tmp_file;
1604 }
1605
1606 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1607 error = -EIO;
1608 goto out_put_tmp_file;
1609 }
1610
1611 error = xfs_swap_extents(ip, tip, sxp);
1612
1613 out_put_tmp_file:
1614 fdput(tmp);
1615 out_put_file:
1616 fdput(f);
1617 out:
1618 return error;
1619 }
1620
1621 /*
1622 * Note: some of the ioctl's return positive numbers as a
1623 * byte count indicating success, such as readlink_by_handle.
1624 * So we don't "sign flip" like most other routines. This means
1625 * true errors need to be returned as a negative value.
1626 */
1627 long
1628 xfs_file_ioctl(
1629 struct file *filp,
1630 unsigned int cmd,
1631 unsigned long p)
1632 {
1633 struct inode *inode = file_inode(filp);
1634 struct xfs_inode *ip = XFS_I(inode);
1635 struct xfs_mount *mp = ip->i_mount;
1636 void __user *arg = (void __user *)p;
1637 int error;
1638
1639 trace_xfs_file_ioctl(ip);
1640
1641 switch (cmd) {
1642 case FITRIM:
1643 return xfs_ioc_trim(mp, arg);
1644 case XFS_IOC_ALLOCSP:
1645 case XFS_IOC_FREESP:
1646 case XFS_IOC_RESVSP:
1647 case XFS_IOC_UNRESVSP:
1648 case XFS_IOC_ALLOCSP64:
1649 case XFS_IOC_FREESP64:
1650 case XFS_IOC_RESVSP64:
1651 case XFS_IOC_UNRESVSP64:
1652 case XFS_IOC_ZERO_RANGE: {
1653 xfs_flock64_t bf;
1654
1655 if (copy_from_user(&bf, arg, sizeof(bf)))
1656 return -EFAULT;
1657 return xfs_ioc_space(filp, cmd, &bf);
1658 }
1659 case XFS_IOC_DIOINFO: {
1660 struct dioattr da;
1661 xfs_buftarg_t *target =
1662 XFS_IS_REALTIME_INODE(ip) ?
1663 mp->m_rtdev_targp : mp->m_ddev_targp;
1664
1665 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1666 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1667
1668 if (copy_to_user(arg, &da, sizeof(da)))
1669 return -EFAULT;
1670 return 0;
1671 }
1672
1673 case XFS_IOC_FSBULKSTAT_SINGLE:
1674 case XFS_IOC_FSBULKSTAT:
1675 case XFS_IOC_FSINUMBERS:
1676 return xfs_ioc_bulkstat(mp, cmd, arg);
1677
1678 case XFS_IOC_FSGEOMETRY_V1:
1679 return xfs_ioc_fsgeometry_v1(mp, arg);
1680
1681 case XFS_IOC_FSGEOMETRY:
1682 return xfs_ioc_fsgeometry(mp, arg);
1683
1684 case XFS_IOC_GETVERSION:
1685 return put_user(inode->i_generation, (int __user *)arg);
1686
1687 case XFS_IOC_FSGETXATTR:
1688 return xfs_ioc_fsgetxattr(ip, 0, arg);
1689 case XFS_IOC_FSGETXATTRA:
1690 return xfs_ioc_fsgetxattr(ip, 1, arg);
1691 case XFS_IOC_FSSETXATTR:
1692 return xfs_ioc_fssetxattr(ip, filp, arg);
1693 case XFS_IOC_GETXFLAGS:
1694 return xfs_ioc_getxflags(ip, arg);
1695 case XFS_IOC_SETXFLAGS:
1696 return xfs_ioc_setxflags(ip, filp, arg);
1697
1698 case XFS_IOC_FSSETDM: {
1699 struct fsdmidata dmi;
1700
1701 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1702 return -EFAULT;
1703
1704 error = mnt_want_write_file(filp);
1705 if (error)
1706 return error;
1707
1708 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1709 dmi.fsd_dmstate);
1710 mnt_drop_write_file(filp);
1711 return error;
1712 }
1713
1714 case XFS_IOC_GETBMAP:
1715 case XFS_IOC_GETBMAPA:
1716 return xfs_ioc_getbmap(filp, cmd, arg);
1717
1718 case XFS_IOC_GETBMAPX:
1719 return xfs_ioc_getbmapx(ip, arg);
1720
1721 case XFS_IOC_FD_TO_HANDLE:
1722 case XFS_IOC_PATH_TO_HANDLE:
1723 case XFS_IOC_PATH_TO_FSHANDLE: {
1724 xfs_fsop_handlereq_t hreq;
1725
1726 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1727 return -EFAULT;
1728 return xfs_find_handle(cmd, &hreq);
1729 }
1730 case XFS_IOC_OPEN_BY_HANDLE: {
1731 xfs_fsop_handlereq_t hreq;
1732
1733 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1734 return -EFAULT;
1735 return xfs_open_by_handle(filp, &hreq);
1736 }
1737 case XFS_IOC_FSSETDM_BY_HANDLE:
1738 return xfs_fssetdm_by_handle(filp, arg);
1739
1740 case XFS_IOC_READLINK_BY_HANDLE: {
1741 xfs_fsop_handlereq_t hreq;
1742
1743 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1744 return -EFAULT;
1745 return xfs_readlink_by_handle(filp, &hreq);
1746 }
1747 case XFS_IOC_ATTRLIST_BY_HANDLE:
1748 return xfs_attrlist_by_handle(filp, arg);
1749
1750 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1751 return xfs_attrmulti_by_handle(filp, arg);
1752
1753 case XFS_IOC_SWAPEXT: {
1754 struct xfs_swapext sxp;
1755
1756 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1757 return -EFAULT;
1758 error = mnt_want_write_file(filp);
1759 if (error)
1760 return error;
1761 error = xfs_ioc_swapext(&sxp);
1762 mnt_drop_write_file(filp);
1763 return error;
1764 }
1765
1766 case XFS_IOC_FSCOUNTS: {
1767 xfs_fsop_counts_t out;
1768
1769 error = xfs_fs_counts(mp, &out);
1770 if (error)
1771 return error;
1772
1773 if (copy_to_user(arg, &out, sizeof(out)))
1774 return -EFAULT;
1775 return 0;
1776 }
1777
1778 case XFS_IOC_SET_RESBLKS: {
1779 xfs_fsop_resblks_t inout;
1780 __uint64_t in;
1781
1782 if (!capable(CAP_SYS_ADMIN))
1783 return -EPERM;
1784
1785 if (mp->m_flags & XFS_MOUNT_RDONLY)
1786 return -EROFS;
1787
1788 if (copy_from_user(&inout, arg, sizeof(inout)))
1789 return -EFAULT;
1790
1791 error = mnt_want_write_file(filp);
1792 if (error)
1793 return error;
1794
1795 /* input parameter is passed in resblks field of structure */
1796 in = inout.resblks;
1797 error = xfs_reserve_blocks(mp, &in, &inout);
1798 mnt_drop_write_file(filp);
1799 if (error)
1800 return error;
1801
1802 if (copy_to_user(arg, &inout, sizeof(inout)))
1803 return -EFAULT;
1804 return 0;
1805 }
1806
1807 case XFS_IOC_GET_RESBLKS: {
1808 xfs_fsop_resblks_t out;
1809
1810 if (!capable(CAP_SYS_ADMIN))
1811 return -EPERM;
1812
1813 error = xfs_reserve_blocks(mp, NULL, &out);
1814 if (error)
1815 return error;
1816
1817 if (copy_to_user(arg, &out, sizeof(out)))
1818 return -EFAULT;
1819
1820 return 0;
1821 }
1822
1823 case XFS_IOC_FSGROWFSDATA: {
1824 xfs_growfs_data_t in;
1825
1826 if (copy_from_user(&in, arg, sizeof(in)))
1827 return -EFAULT;
1828
1829 error = mnt_want_write_file(filp);
1830 if (error)
1831 return error;
1832 error = xfs_growfs_data(mp, &in);
1833 mnt_drop_write_file(filp);
1834 return error;
1835 }
1836
1837 case XFS_IOC_FSGROWFSLOG: {
1838 xfs_growfs_log_t in;
1839
1840 if (copy_from_user(&in, arg, sizeof(in)))
1841 return -EFAULT;
1842
1843 error = mnt_want_write_file(filp);
1844 if (error)
1845 return error;
1846 error = xfs_growfs_log(mp, &in);
1847 mnt_drop_write_file(filp);
1848 return error;
1849 }
1850
1851 case XFS_IOC_FSGROWFSRT: {
1852 xfs_growfs_rt_t in;
1853
1854 if (copy_from_user(&in, arg, sizeof(in)))
1855 return -EFAULT;
1856
1857 error = mnt_want_write_file(filp);
1858 if (error)
1859 return error;
1860 error = xfs_growfs_rt(mp, &in);
1861 mnt_drop_write_file(filp);
1862 return error;
1863 }
1864
1865 case XFS_IOC_GOINGDOWN: {
1866 __uint32_t in;
1867
1868 if (!capable(CAP_SYS_ADMIN))
1869 return -EPERM;
1870
1871 if (get_user(in, (__uint32_t __user *)arg))
1872 return -EFAULT;
1873
1874 return xfs_fs_goingdown(mp, in);
1875 }
1876
1877 case XFS_IOC_ERROR_INJECTION: {
1878 xfs_error_injection_t in;
1879
1880 if (!capable(CAP_SYS_ADMIN))
1881 return -EPERM;
1882
1883 if (copy_from_user(&in, arg, sizeof(in)))
1884 return -EFAULT;
1885
1886 return xfs_errortag_add(in.errtag, mp);
1887 }
1888
1889 case XFS_IOC_ERROR_CLEARALL:
1890 if (!capable(CAP_SYS_ADMIN))
1891 return -EPERM;
1892
1893 return xfs_errortag_clearall(mp, 1);
1894
1895 case XFS_IOC_FREE_EOFBLOCKS: {
1896 struct xfs_fs_eofblocks eofb;
1897 struct xfs_eofblocks keofb;
1898
1899 if (!capable(CAP_SYS_ADMIN))
1900 return -EPERM;
1901
1902 if (mp->m_flags & XFS_MOUNT_RDONLY)
1903 return -EROFS;
1904
1905 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1906 return -EFAULT;
1907
1908 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1909 if (error)
1910 return error;
1911
1912 return xfs_icache_free_eofblocks(mp, &keofb);
1913 }
1914
1915 default:
1916 return -ENOTTY;
1917 }
1918 }
Linux with added FPC-III support