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arm64: kgdb: Fix single-step exception handling oops
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blob6c95812120ebdfddb5709bc4df4831631d7745f2
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_vn_setattr_size(file_dentry(filp), &iattr);
724 break;
725 default:
726 ASSERT(0);
727 error = -EINVAL;
728 }
729
730 if (error)
731 goto out_unlock;
732
733 error = xfs_update_prealloc_flags(ip, flags);
734
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_cowextsize = ip->i_d.di_cowextsize <<
907 ip->i_mount->m_sb.sb_blocklog;
908 fa.fsx_projid = xfs_get_projid(ip);
909
910 if (attr) {
911 if (ip->i_afp) {
912 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
913 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
914 else
915 fa.fsx_nextents = ip->i_d.di_anextents;
916 } else
917 fa.fsx_nextents = 0;
918 } else {
919 if (ip->i_df.if_flags & XFS_IFEXTENTS)
920 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
921 else
922 fa.fsx_nextents = ip->i_d.di_nextents;
923 }
924 xfs_iunlock(ip, XFS_ILOCK_SHARED);
925
926 if (copy_to_user(arg, &fa, sizeof(fa)))
927 return -EFAULT;
928 return 0;
929 }
930
931 STATIC uint16_t
932 xfs_flags2diflags(
933 struct xfs_inode *ip,
934 unsigned int xflags)
935 {
936 /* can't set PREALLOC this way, just preserve it */
937 uint16_t di_flags =
938 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
939
940 if (xflags & FS_XFLAG_IMMUTABLE)
941 di_flags |= XFS_DIFLAG_IMMUTABLE;
942 if (xflags & FS_XFLAG_APPEND)
943 di_flags |= XFS_DIFLAG_APPEND;
944 if (xflags & FS_XFLAG_SYNC)
945 di_flags |= XFS_DIFLAG_SYNC;
946 if (xflags & FS_XFLAG_NOATIME)
947 di_flags |= XFS_DIFLAG_NOATIME;
948 if (xflags & FS_XFLAG_NODUMP)
949 di_flags |= XFS_DIFLAG_NODUMP;
950 if (xflags & FS_XFLAG_NODEFRAG)
951 di_flags |= XFS_DIFLAG_NODEFRAG;
952 if (xflags & FS_XFLAG_FILESTREAM)
953 di_flags |= XFS_DIFLAG_FILESTREAM;
954 if (S_ISDIR(VFS_I(ip)->i_mode)) {
955 if (xflags & FS_XFLAG_RTINHERIT)
956 di_flags |= XFS_DIFLAG_RTINHERIT;
957 if (xflags & FS_XFLAG_NOSYMLINKS)
958 di_flags |= XFS_DIFLAG_NOSYMLINKS;
959 if (xflags & FS_XFLAG_EXTSZINHERIT)
960 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
961 if (xflags & FS_XFLAG_PROJINHERIT)
962 di_flags |= XFS_DIFLAG_PROJINHERIT;
963 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
964 if (xflags & FS_XFLAG_REALTIME)
965 di_flags |= XFS_DIFLAG_REALTIME;
966 if (xflags & FS_XFLAG_EXTSIZE)
967 di_flags |= XFS_DIFLAG_EXTSIZE;
968 }
969
970 return di_flags;
971 }
972
973 STATIC uint64_t
974 xfs_flags2diflags2(
975 struct xfs_inode *ip,
976 unsigned int xflags)
977 {
978 uint64_t di_flags2 =
979 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
980
981 if (xflags & FS_XFLAG_DAX)
982 di_flags2 |= XFS_DIFLAG2_DAX;
983 if (xflags & FS_XFLAG_COWEXTSIZE)
984 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
985
986 return di_flags2;
987 }
988
989 STATIC void
990 xfs_diflags_to_linux(
991 struct xfs_inode *ip)
992 {
993 struct inode *inode = VFS_I(ip);
994 unsigned int xflags = xfs_ip2xflags(ip);
995
996 if (xflags & FS_XFLAG_IMMUTABLE)
997 inode->i_flags |= S_IMMUTABLE;
998 else
999 inode->i_flags &= ~S_IMMUTABLE;
1000 if (xflags & FS_XFLAG_APPEND)
1001 inode->i_flags |= S_APPEND;
1002 else
1003 inode->i_flags &= ~S_APPEND;
1004 if (xflags & FS_XFLAG_SYNC)
1005 inode->i_flags |= S_SYNC;
1006 else
1007 inode->i_flags &= ~S_SYNC;
1008 if (xflags & FS_XFLAG_NOATIME)
1009 inode->i_flags |= S_NOATIME;
1010 else
1011 inode->i_flags &= ~S_NOATIME;
1012 #if 0 /* disabled until the flag switching races are sorted out */
1013 if (xflags & FS_XFLAG_DAX)
1014 inode->i_flags |= S_DAX;
1015 else
1016 inode->i_flags &= ~S_DAX;
1017 #endif
1018 }
1019
1020 static int
1021 xfs_ioctl_setattr_xflags(
1022 struct xfs_trans *tp,
1023 struct xfs_inode *ip,
1024 struct fsxattr *fa)
1025 {
1026 struct xfs_mount *mp = ip->i_mount;
1027 uint64_t di_flags2;
1028
1029 /* Can't change realtime flag if any extents are allocated. */
1030 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1031 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1032 return -EINVAL;
1033
1034 /* If realtime flag is set then must have realtime device */
1035 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1036 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1037 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1038 return -EINVAL;
1039 }
1040
1041 /* Clear reflink if we are actually able to set the rt flag. */
1042 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1043 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1044
1045 /* Don't allow us to set DAX mode for a reflinked file for now. */
1046 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1047 return -EINVAL;
1048
1049 /*
1050 * Can't modify an immutable/append-only file unless
1051 * we have appropriate permission.
1052 */
1053 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1054 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1055 !capable(CAP_LINUX_IMMUTABLE))
1056 return -EPERM;
1057
1058 /* diflags2 only valid for v3 inodes. */
1059 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1060 if (di_flags2 && ip->i_d.di_version < 3)
1061 return -EINVAL;
1062
1063 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1064 ip->i_d.di_flags2 = di_flags2;
1065
1066 xfs_diflags_to_linux(ip);
1067 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1068 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1069 XFS_STATS_INC(mp, xs_ig_attrchg);
1070 return 0;
1071 }
1072
1073 /*
1074 * If we are changing DAX flags, we have to ensure the file is clean and any
1075 * cached objects in the address space are invalidated and removed. This
1076 * requires us to lock out other IO and page faults similar to a truncate
1077 * operation. The locks need to be held until the transaction has been committed
1078 * so that the cache invalidation is atomic with respect to the DAX flag
1079 * manipulation.
1080 */
1081 static int
1082 xfs_ioctl_setattr_dax_invalidate(
1083 struct xfs_inode *ip,
1084 struct fsxattr *fa,
1085 int *join_flags)
1086 {
1087 struct inode *inode = VFS_I(ip);
1088 struct super_block *sb = inode->i_sb;
1089 int error;
1090
1091 *join_flags = 0;
1092
1093 /*
1094 * It is only valid to set the DAX flag on regular files and
1095 * directories on filesystems where the block size is equal to the page
1096 * size. On directories it serves as an inherit hint.
1097 */
1098 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1099 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1100 return -EINVAL;
1101 if (bdev_dax_supported(sb, sb->s_blocksize) < 0)
1102 return -EINVAL;
1103 }
1104
1105 /* If the DAX state is not changing, we have nothing to do here. */
1106 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1107 return 0;
1108 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1109 return 0;
1110
1111 /* lock, flush and invalidate mapping in preparation for flag change */
1112 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1113 error = filemap_write_and_wait(inode->i_mapping);
1114 if (error)
1115 goto out_unlock;
1116 error = invalidate_inode_pages2(inode->i_mapping);
1117 if (error)
1118 goto out_unlock;
1119
1120 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1121 return 0;
1122
1123 out_unlock:
1124 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1125 return error;
1126
1127 }
1128
1129 /*
1130 * Set up the transaction structure for the setattr operation, checking that we
1131 * have permission to do so. On success, return a clean transaction and the
1132 * inode locked exclusively ready for further operation specific checks. On
1133 * failure, return an error without modifying or locking the inode.
1134 *
1135 * The inode might already be IO locked on call. If this is the case, it is
1136 * indicated in @join_flags and we take full responsibility for ensuring they
1137 * are unlocked from now on. Hence if we have an error here, we still have to
1138 * unlock them. Otherwise, once they are joined to the transaction, they will
1139 * be unlocked on commit/cancel.
1140 */
1141 static struct xfs_trans *
1142 xfs_ioctl_setattr_get_trans(
1143 struct xfs_inode *ip,
1144 int join_flags)
1145 {
1146 struct xfs_mount *mp = ip->i_mount;
1147 struct xfs_trans *tp;
1148 int error = -EROFS;
1149
1150 if (mp->m_flags & XFS_MOUNT_RDONLY)
1151 goto out_unlock;
1152 error = -EIO;
1153 if (XFS_FORCED_SHUTDOWN(mp))
1154 goto out_unlock;
1155
1156 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1157 if (error)
1158 return ERR_PTR(error);
1159
1160 xfs_ilock(ip, XFS_ILOCK_EXCL);
1161 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1162 join_flags = 0;
1163
1164 /*
1165 * CAP_FOWNER overrides the following restrictions:
1166 *
1167 * The user ID of the calling process must be equal to the file owner
1168 * ID, except in cases where the CAP_FSETID capability is applicable.
1169 */
1170 if (!inode_owner_or_capable(VFS_I(ip))) {
1171 error = -EPERM;
1172 goto out_cancel;
1173 }
1174
1175 if (mp->m_flags & XFS_MOUNT_WSYNC)
1176 xfs_trans_set_sync(tp);
1177
1178 return tp;
1179
1180 out_cancel:
1181 xfs_trans_cancel(tp);
1182 out_unlock:
1183 if (join_flags)
1184 xfs_iunlock(ip, join_flags);
1185 return ERR_PTR(error);
1186 }
1187
1188 /*
1189 * extent size hint validation is somewhat cumbersome. Rules are:
1190 *
1191 * 1. extent size hint is only valid for directories and regular files
1192 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1193 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1194 * 4. can only be changed on regular files if no extents are allocated
1195 * 5. can be changed on directories at any time
1196 * 6. extsize hint of 0 turns off hints, clears inode flags.
1197 * 7. Extent size must be a multiple of the appropriate block size.
1198 * 8. for non-realtime files, the extent size hint must be limited
1199 * to half the AG size to avoid alignment extending the extent beyond the
1200 * limits of the AG.
1201 */
1202 static int
1203 xfs_ioctl_setattr_check_extsize(
1204 struct xfs_inode *ip,
1205 struct fsxattr *fa)
1206 {
1207 struct xfs_mount *mp = ip->i_mount;
1208
1209 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1210 return -EINVAL;
1211
1212 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1213 !S_ISDIR(VFS_I(ip)->i_mode))
1214 return -EINVAL;
1215
1216 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1217 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1218 return -EINVAL;
1219
1220 if (fa->fsx_extsize != 0) {
1221 xfs_extlen_t size;
1222 xfs_fsblock_t extsize_fsb;
1223
1224 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1225 if (extsize_fsb > MAXEXTLEN)
1226 return -EINVAL;
1227
1228 if (XFS_IS_REALTIME_INODE(ip) ||
1229 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1230 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1231 } else {
1232 size = mp->m_sb.sb_blocksize;
1233 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1234 return -EINVAL;
1235 }
1236
1237 if (fa->fsx_extsize % size)
1238 return -EINVAL;
1239 } else
1240 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1241
1242 return 0;
1243 }
1244
1245 /*
1246 * CoW extent size hint validation rules are:
1247 *
1248 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1249 * The inode does not have to have any shared blocks, but it must be a v3.
1250 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1251 * for a directory, the hint is propagated to new files.
1252 * 3. Can be changed on files & directories at any time.
1253 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1254 * 5. Extent size must be a multiple of the appropriate block size.
1255 * 6. The extent size hint must be limited to half the AG size to avoid
1256 * alignment extending the extent beyond the limits of the AG.
1257 */
1258 static int
1259 xfs_ioctl_setattr_check_cowextsize(
1260 struct xfs_inode *ip,
1261 struct fsxattr *fa)
1262 {
1263 struct xfs_mount *mp = ip->i_mount;
1264
1265 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1266 return 0;
1267
1268 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1269 ip->i_d.di_version != 3)
1270 return -EINVAL;
1271
1272 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1273 return -EINVAL;
1274
1275 if (fa->fsx_cowextsize != 0) {
1276 xfs_extlen_t size;
1277 xfs_fsblock_t cowextsize_fsb;
1278
1279 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1280 if (cowextsize_fsb > MAXEXTLEN)
1281 return -EINVAL;
1282
1283 size = mp->m_sb.sb_blocksize;
1284 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1285 return -EINVAL;
1286
1287 if (fa->fsx_cowextsize % size)
1288 return -EINVAL;
1289 } else
1290 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1291
1292 return 0;
1293 }
1294
1295 static int
1296 xfs_ioctl_setattr_check_projid(
1297 struct xfs_inode *ip,
1298 struct fsxattr *fa)
1299 {
1300 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1301 if (fa->fsx_projid > (__uint16_t)-1 &&
1302 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1303 return -EINVAL;
1304
1305 /*
1306 * Project Quota ID state is only allowed to change from within the init
1307 * namespace. Enforce that restriction only if we are trying to change
1308 * the quota ID state. Everything else is allowed in user namespaces.
1309 */
1310 if (current_user_ns() == &init_user_ns)
1311 return 0;
1312
1313 if (xfs_get_projid(ip) != fa->fsx_projid)
1314 return -EINVAL;
1315 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1316 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1317 return -EINVAL;
1318
1319 return 0;
1320 }
1321
1322 STATIC int
1323 xfs_ioctl_setattr(
1324 xfs_inode_t *ip,
1325 struct fsxattr *fa)
1326 {
1327 struct xfs_mount *mp = ip->i_mount;
1328 struct xfs_trans *tp;
1329 struct xfs_dquot *udqp = NULL;
1330 struct xfs_dquot *pdqp = NULL;
1331 struct xfs_dquot *olddquot = NULL;
1332 int code;
1333 int join_flags = 0;
1334
1335 trace_xfs_ioctl_setattr(ip);
1336
1337 code = xfs_ioctl_setattr_check_projid(ip, fa);
1338 if (code)
1339 return code;
1340
1341 /*
1342 * If disk quotas is on, we make sure that the dquots do exist on disk,
1343 * before we start any other transactions. Trying to do this later
1344 * is messy. We don't care to take a readlock to look at the ids
1345 * in inode here, because we can't hold it across the trans_reserve.
1346 * If the IDs do change before we take the ilock, we're covered
1347 * because the i_*dquot fields will get updated anyway.
1348 */
1349 if (XFS_IS_QUOTA_ON(mp)) {
1350 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1351 ip->i_d.di_gid, fa->fsx_projid,
1352 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1353 if (code)
1354 return code;
1355 }
1356
1357 /*
1358 * Changing DAX config may require inode locking for mapping
1359 * invalidation. These need to be held all the way to transaction commit
1360 * or cancel time, so need to be passed through to
1361 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1362 * appropriately.
1363 */
1364 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1365 if (code)
1366 goto error_free_dquots;
1367
1368 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1369 if (IS_ERR(tp)) {
1370 code = PTR_ERR(tp);
1371 goto error_free_dquots;
1372 }
1373
1374
1375 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1376 xfs_get_projid(ip) != fa->fsx_projid) {
1377 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1378 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1379 if (code) /* out of quota */
1380 goto error_trans_cancel;
1381 }
1382
1383 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1384 if (code)
1385 goto error_trans_cancel;
1386
1387 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1388 if (code)
1389 goto error_trans_cancel;
1390
1391 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1392 if (code)
1393 goto error_trans_cancel;
1394
1395 /*
1396 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1397 * overrides the following restrictions:
1398 *
1399 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1400 * successful return from chown()
1401 */
1402
1403 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1404 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1405 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1406
1407 /* Change the ownerships and register project quota modifications */
1408 if (xfs_get_projid(ip) != fa->fsx_projid) {
1409 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1410 olddquot = xfs_qm_vop_chown(tp, ip,
1411 &ip->i_pdquot, pdqp);
1412 }
1413 ASSERT(ip->i_d.di_version > 1);
1414 xfs_set_projid(ip, fa->fsx_projid);
1415 }
1416
1417 /*
1418 * Only set the extent size hint if we've already determined that the
1419 * extent size hint should be set on the inode. If no extent size flags
1420 * are set on the inode then unconditionally clear the extent size hint.
1421 */
1422 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1423 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1424 else
1425 ip->i_d.di_extsize = 0;
1426 if (ip->i_d.di_version == 3 &&
1427 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1428 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1429 mp->m_sb.sb_blocklog;
1430 else
1431 ip->i_d.di_cowextsize = 0;
1432
1433 code = xfs_trans_commit(tp);
1434
1435 /*
1436 * Release any dquot(s) the inode had kept before chown.
1437 */
1438 xfs_qm_dqrele(olddquot);
1439 xfs_qm_dqrele(udqp);
1440 xfs_qm_dqrele(pdqp);
1441
1442 return code;
1443
1444 error_trans_cancel:
1445 xfs_trans_cancel(tp);
1446 error_free_dquots:
1447 xfs_qm_dqrele(udqp);
1448 xfs_qm_dqrele(pdqp);
1449 return code;
1450 }
1451
1452 STATIC int
1453 xfs_ioc_fssetxattr(
1454 xfs_inode_t *ip,
1455 struct file *filp,
1456 void __user *arg)
1457 {
1458 struct fsxattr fa;
1459 int error;
1460
1461 if (copy_from_user(&fa, arg, sizeof(fa)))
1462 return -EFAULT;
1463
1464 error = mnt_want_write_file(filp);
1465 if (error)
1466 return error;
1467 error = xfs_ioctl_setattr(ip, &fa);
1468 mnt_drop_write_file(filp);
1469 return error;
1470 }
1471
1472 STATIC int
1473 xfs_ioc_getxflags(
1474 xfs_inode_t *ip,
1475 void __user *arg)
1476 {
1477 unsigned int flags;
1478
1479 flags = xfs_di2lxflags(ip->i_d.di_flags);
1480 if (copy_to_user(arg, &flags, sizeof(flags)))
1481 return -EFAULT;
1482 return 0;
1483 }
1484
1485 STATIC int
1486 xfs_ioc_setxflags(
1487 struct xfs_inode *ip,
1488 struct file *filp,
1489 void __user *arg)
1490 {
1491 struct xfs_trans *tp;
1492 struct fsxattr fa;
1493 unsigned int flags;
1494 int join_flags = 0;
1495 int error;
1496
1497 if (copy_from_user(&flags, arg, sizeof(flags)))
1498 return -EFAULT;
1499
1500 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1501 FS_NOATIME_FL | FS_NODUMP_FL | \
1502 FS_SYNC_FL))
1503 return -EOPNOTSUPP;
1504
1505 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1506
1507 error = mnt_want_write_file(filp);
1508 if (error)
1509 return error;
1510
1511 /*
1512 * Changing DAX config may require inode locking for mapping
1513 * invalidation. These need to be held all the way to transaction commit
1514 * or cancel time, so need to be passed through to
1515 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1516 * appropriately.
1517 */
1518 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1519 if (error)
1520 goto out_drop_write;
1521
1522 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1523 if (IS_ERR(tp)) {
1524 error = PTR_ERR(tp);
1525 goto out_drop_write;
1526 }
1527
1528 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1529 if (error) {
1530 xfs_trans_cancel(tp);
1531 goto out_drop_write;
1532 }
1533
1534 error = xfs_trans_commit(tp);
1535 out_drop_write:
1536 mnt_drop_write_file(filp);
1537 return error;
1538 }
1539
1540 STATIC int
1541 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1542 {
1543 struct getbmap __user *base = (struct getbmap __user *)*ap;
1544
1545 /* copy only getbmap portion (not getbmapx) */
1546 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1547 return -EFAULT;
1548
1549 *ap += sizeof(struct getbmap);
1550 return 0;
1551 }
1552
1553 STATIC int
1554 xfs_ioc_getbmap(
1555 struct file *file,
1556 unsigned int cmd,
1557 void __user *arg)
1558 {
1559 struct getbmapx bmx = { 0 };
1560 int error;
1561
1562 /* struct getbmap is a strict subset of struct getbmapx. */
1563 if (copy_from_user(&bmx, arg, offsetof(struct getbmapx, bmv_iflags)))
1564 return -EFAULT;
1565
1566 if (bmx.bmv_count < 2)
1567 return -EINVAL;
1568
1569 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1570 if (file->f_mode & FMODE_NOCMTIME)
1571 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1572
1573 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
1574 (__force struct getbmap *)arg+1);
1575 if (error)
1576 return error;
1577
1578 /* copy back header - only size of getbmap */
1579 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1580 return -EFAULT;
1581 return 0;
1582 }
1583
1584 STATIC int
1585 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1586 {
1587 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1588
1589 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1590 return -EFAULT;
1591
1592 *ap += sizeof(struct getbmapx);
1593 return 0;
1594 }
1595
1596 STATIC int
1597 xfs_ioc_getbmapx(
1598 struct xfs_inode *ip,
1599 void __user *arg)
1600 {
1601 struct getbmapx bmx;
1602 int error;
1603
1604 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1605 return -EFAULT;
1606
1607 if (bmx.bmv_count < 2)
1608 return -EINVAL;
1609
1610 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1611 return -EINVAL;
1612
1613 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1614 (__force struct getbmapx *)arg+1);
1615 if (error)
1616 return error;
1617
1618 /* copy back header */
1619 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1620 return -EFAULT;
1621
1622 return 0;
1623 }
1624
1625 int
1626 xfs_ioc_swapext(
1627 xfs_swapext_t *sxp)
1628 {
1629 xfs_inode_t *ip, *tip;
1630 struct fd f, tmp;
1631 int error = 0;
1632
1633 /* Pull information for the target fd */
1634 f = fdget((int)sxp->sx_fdtarget);
1635 if (!f.file) {
1636 error = -EINVAL;
1637 goto out;
1638 }
1639
1640 if (!(f.file->f_mode & FMODE_WRITE) ||
1641 !(f.file->f_mode & FMODE_READ) ||
1642 (f.file->f_flags & O_APPEND)) {
1643 error = -EBADF;
1644 goto out_put_file;
1645 }
1646
1647 tmp = fdget((int)sxp->sx_fdtmp);
1648 if (!tmp.file) {
1649 error = -EINVAL;
1650 goto out_put_file;
1651 }
1652
1653 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1654 !(tmp.file->f_mode & FMODE_READ) ||
1655 (tmp.file->f_flags & O_APPEND)) {
1656 error = -EBADF;
1657 goto out_put_tmp_file;
1658 }
1659
1660 if (IS_SWAPFILE(file_inode(f.file)) ||
1661 IS_SWAPFILE(file_inode(tmp.file))) {
1662 error = -EINVAL;
1663 goto out_put_tmp_file;
1664 }
1665
1666 /*
1667 * We need to ensure that the fds passed in point to XFS inodes
1668 * before we cast and access them as XFS structures as we have no
1669 * control over what the user passes us here.
1670 */
1671 if (f.file->f_op != &xfs_file_operations ||
1672 tmp.file->f_op != &xfs_file_operations) {
1673 error = -EINVAL;
1674 goto out_put_tmp_file;
1675 }
1676
1677 ip = XFS_I(file_inode(f.file));
1678 tip = XFS_I(file_inode(tmp.file));
1679
1680 if (ip->i_mount != tip->i_mount) {
1681 error = -EINVAL;
1682 goto out_put_tmp_file;
1683 }
1684
1685 if (ip->i_ino == tip->i_ino) {
1686 error = -EINVAL;
1687 goto out_put_tmp_file;
1688 }
1689
1690 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1691 error = -EIO;
1692 goto out_put_tmp_file;
1693 }
1694
1695 error = xfs_swap_extents(ip, tip, sxp);
1696
1697 out_put_tmp_file:
1698 fdput(tmp);
1699 out_put_file:
1700 fdput(f);
1701 out:
1702 return error;
1703 }
1704
1705 /*
1706 * Note: some of the ioctl's return positive numbers as a
1707 * byte count indicating success, such as readlink_by_handle.
1708 * So we don't "sign flip" like most other routines. This means
1709 * true errors need to be returned as a negative value.
1710 */
1711 long
1712 xfs_file_ioctl(
1713 struct file *filp,
1714 unsigned int cmd,
1715 unsigned long p)
1716 {
1717 struct inode *inode = file_inode(filp);
1718 struct xfs_inode *ip = XFS_I(inode);
1719 struct xfs_mount *mp = ip->i_mount;
1720 void __user *arg = (void __user *)p;
1721 int error;
1722
1723 trace_xfs_file_ioctl(ip);
1724
1725 switch (cmd) {
1726 case FITRIM:
1727 return xfs_ioc_trim(mp, arg);
1728 case XFS_IOC_ALLOCSP:
1729 case XFS_IOC_FREESP:
1730 case XFS_IOC_RESVSP:
1731 case XFS_IOC_UNRESVSP:
1732 case XFS_IOC_ALLOCSP64:
1733 case XFS_IOC_FREESP64:
1734 case XFS_IOC_RESVSP64:
1735 case XFS_IOC_UNRESVSP64:
1736 case XFS_IOC_ZERO_RANGE: {
1737 xfs_flock64_t bf;
1738
1739 if (copy_from_user(&bf, arg, sizeof(bf)))
1740 return -EFAULT;
1741 return xfs_ioc_space(filp, cmd, &bf);
1742 }
1743 case XFS_IOC_DIOINFO: {
1744 struct dioattr da;
1745 xfs_buftarg_t *target =
1746 XFS_IS_REALTIME_INODE(ip) ?
1747 mp->m_rtdev_targp : mp->m_ddev_targp;
1748
1749 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1750 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1751
1752 if (copy_to_user(arg, &da, sizeof(da)))
1753 return -EFAULT;
1754 return 0;
1755 }
1756
1757 case XFS_IOC_FSBULKSTAT_SINGLE:
1758 case XFS_IOC_FSBULKSTAT:
1759 case XFS_IOC_FSINUMBERS:
1760 return xfs_ioc_bulkstat(mp, cmd, arg);
1761
1762 case XFS_IOC_FSGEOMETRY_V1:
1763 return xfs_ioc_fsgeometry_v1(mp, arg);
1764
1765 case XFS_IOC_FSGEOMETRY:
1766 return xfs_ioc_fsgeometry(mp, arg);
1767
1768 case XFS_IOC_GETVERSION:
1769 return put_user(inode->i_generation, (int __user *)arg);
1770
1771 case XFS_IOC_FSGETXATTR:
1772 return xfs_ioc_fsgetxattr(ip, 0, arg);
1773 case XFS_IOC_FSGETXATTRA:
1774 return xfs_ioc_fsgetxattr(ip, 1, arg);
1775 case XFS_IOC_FSSETXATTR:
1776 return xfs_ioc_fssetxattr(ip, filp, arg);
1777 case XFS_IOC_GETXFLAGS:
1778 return xfs_ioc_getxflags(ip, arg);
1779 case XFS_IOC_SETXFLAGS:
1780 return xfs_ioc_setxflags(ip, filp, arg);
1781
1782 case XFS_IOC_FSSETDM: {
1783 struct fsdmidata dmi;
1784
1785 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1786 return -EFAULT;
1787
1788 error = mnt_want_write_file(filp);
1789 if (error)
1790 return error;
1791
1792 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1793 dmi.fsd_dmstate);
1794 mnt_drop_write_file(filp);
1795 return error;
1796 }
1797
1798 case XFS_IOC_GETBMAP:
1799 case XFS_IOC_GETBMAPA:
1800 return xfs_ioc_getbmap(filp, cmd, arg);
1801
1802 case XFS_IOC_GETBMAPX:
1803 return xfs_ioc_getbmapx(ip, arg);
1804
1805 case XFS_IOC_FD_TO_HANDLE:
1806 case XFS_IOC_PATH_TO_HANDLE:
1807 case XFS_IOC_PATH_TO_FSHANDLE: {
1808 xfs_fsop_handlereq_t hreq;
1809
1810 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1811 return -EFAULT;
1812 return xfs_find_handle(cmd, &hreq);
1813 }
1814 case XFS_IOC_OPEN_BY_HANDLE: {
1815 xfs_fsop_handlereq_t hreq;
1816
1817 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1818 return -EFAULT;
1819 return xfs_open_by_handle(filp, &hreq);
1820 }
1821 case XFS_IOC_FSSETDM_BY_HANDLE:
1822 return xfs_fssetdm_by_handle(filp, arg);
1823
1824 case XFS_IOC_READLINK_BY_HANDLE: {
1825 xfs_fsop_handlereq_t hreq;
1826
1827 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1828 return -EFAULT;
1829 return xfs_readlink_by_handle(filp, &hreq);
1830 }
1831 case XFS_IOC_ATTRLIST_BY_HANDLE:
1832 return xfs_attrlist_by_handle(filp, arg);
1833
1834 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1835 return xfs_attrmulti_by_handle(filp, arg);
1836
1837 case XFS_IOC_SWAPEXT: {
1838 struct xfs_swapext sxp;
1839
1840 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1841 return -EFAULT;
1842 error = mnt_want_write_file(filp);
1843 if (error)
1844 return error;
1845 error = xfs_ioc_swapext(&sxp);
1846 mnt_drop_write_file(filp);
1847 return error;
1848 }
1849
1850 case XFS_IOC_FSCOUNTS: {
1851 xfs_fsop_counts_t out;
1852
1853 error = xfs_fs_counts(mp, &out);
1854 if (error)
1855 return error;
1856
1857 if (copy_to_user(arg, &out, sizeof(out)))
1858 return -EFAULT;
1859 return 0;
1860 }
1861
1862 case XFS_IOC_SET_RESBLKS: {
1863 xfs_fsop_resblks_t inout;
1864 __uint64_t in;
1865
1866 if (!capable(CAP_SYS_ADMIN))
1867 return -EPERM;
1868
1869 if (mp->m_flags & XFS_MOUNT_RDONLY)
1870 return -EROFS;
1871
1872 if (copy_from_user(&inout, arg, sizeof(inout)))
1873 return -EFAULT;
1874
1875 error = mnt_want_write_file(filp);
1876 if (error)
1877 return error;
1878
1879 /* input parameter is passed in resblks field of structure */
1880 in = inout.resblks;
1881 error = xfs_reserve_blocks(mp, &in, &inout);
1882 mnt_drop_write_file(filp);
1883 if (error)
1884 return error;
1885
1886 if (copy_to_user(arg, &inout, sizeof(inout)))
1887 return -EFAULT;
1888 return 0;
1889 }
1890
1891 case XFS_IOC_GET_RESBLKS: {
1892 xfs_fsop_resblks_t out;
1893
1894 if (!capable(CAP_SYS_ADMIN))
1895 return -EPERM;
1896
1897 error = xfs_reserve_blocks(mp, NULL, &out);
1898 if (error)
1899 return error;
1900
1901 if (copy_to_user(arg, &out, sizeof(out)))
1902 return -EFAULT;
1903
1904 return 0;
1905 }
1906
1907 case XFS_IOC_FSGROWFSDATA: {
1908 xfs_growfs_data_t in;
1909
1910 if (copy_from_user(&in, arg, sizeof(in)))
1911 return -EFAULT;
1912
1913 error = mnt_want_write_file(filp);
1914 if (error)
1915 return error;
1916 error = xfs_growfs_data(mp, &in);
1917 mnt_drop_write_file(filp);
1918 return error;
1919 }
1920
1921 case XFS_IOC_FSGROWFSLOG: {
1922 xfs_growfs_log_t in;
1923
1924 if (copy_from_user(&in, arg, sizeof(in)))
1925 return -EFAULT;
1926
1927 error = mnt_want_write_file(filp);
1928 if (error)
1929 return error;
1930 error = xfs_growfs_log(mp, &in);
1931 mnt_drop_write_file(filp);
1932 return error;
1933 }
1934
1935 case XFS_IOC_FSGROWFSRT: {
1936 xfs_growfs_rt_t in;
1937
1938 if (copy_from_user(&in, arg, sizeof(in)))
1939 return -EFAULT;
1940
1941 error = mnt_want_write_file(filp);
1942 if (error)
1943 return error;
1944 error = xfs_growfs_rt(mp, &in);
1945 mnt_drop_write_file(filp);
1946 return error;
1947 }
1948
1949 case XFS_IOC_GOINGDOWN: {
1950 __uint32_t in;
1951
1952 if (!capable(CAP_SYS_ADMIN))
1953 return -EPERM;
1954
1955 if (get_user(in, (__uint32_t __user *)arg))
1956 return -EFAULT;
1957
1958 return xfs_fs_goingdown(mp, in);
1959 }
1960
1961 case XFS_IOC_ERROR_INJECTION: {
1962 xfs_error_injection_t in;
1963
1964 if (!capable(CAP_SYS_ADMIN))
1965 return -EPERM;
1966
1967 if (copy_from_user(&in, arg, sizeof(in)))
1968 return -EFAULT;
1969
1970 return xfs_errortag_add(in.errtag, mp);
1971 }
1972
1973 case XFS_IOC_ERROR_CLEARALL:
1974 if (!capable(CAP_SYS_ADMIN))
1975 return -EPERM;
1976
1977 return xfs_errortag_clearall(mp, 1);
1978
1979 case XFS_IOC_FREE_EOFBLOCKS: {
1980 struct xfs_fs_eofblocks eofb;
1981 struct xfs_eofblocks keofb;
1982
1983 if (!capable(CAP_SYS_ADMIN))
1984 return -EPERM;
1985
1986 if (mp->m_flags & XFS_MOUNT_RDONLY)
1987 return -EROFS;
1988
1989 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1990 return -EFAULT;
1991
1992 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1993 if (error)
1994 return error;
1995
1996 return xfs_icache_free_eofblocks(mp, &keofb);
1997 }
1998
1999 default:
2000 return -ENOTTY;
2001 }
2002 }
Linux with added FPC-III support