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x86/entry/32, x86/boot/32: Use local labels
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blobc245bed3249bf1a192f430c7b7c781e84baf93e3
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 = ip->i_afp->if_bytes /
914 sizeof(xfs_bmbt_rec_t);
915 else
916 fa.fsx_nextents = ip->i_d.di_anextents;
917 } else
918 fa.fsx_nextents = 0;
919 } else {
920 if (ip->i_df.if_flags & XFS_IFEXTENTS)
921 fa.fsx_nextents = ip->i_df.if_bytes /
922 sizeof(xfs_bmbt_rec_t);
923 else
924 fa.fsx_nextents = ip->i_d.di_nextents;
925 }
926 xfs_iunlock(ip, XFS_ILOCK_SHARED);
927
928 if (copy_to_user(arg, &fa, sizeof(fa)))
929 return -EFAULT;
930 return 0;
931 }
932
933 STATIC void
934 xfs_set_diflags(
935 struct xfs_inode *ip,
936 unsigned int xflags)
937 {
938 unsigned int di_flags;
939 uint64_t di_flags2;
940
941 /* can't set PREALLOC this way, just preserve it */
942 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
943 if (xflags & FS_XFLAG_IMMUTABLE)
944 di_flags |= XFS_DIFLAG_IMMUTABLE;
945 if (xflags & FS_XFLAG_APPEND)
946 di_flags |= XFS_DIFLAG_APPEND;
947 if (xflags & FS_XFLAG_SYNC)
948 di_flags |= XFS_DIFLAG_SYNC;
949 if (xflags & FS_XFLAG_NOATIME)
950 di_flags |= XFS_DIFLAG_NOATIME;
951 if (xflags & FS_XFLAG_NODUMP)
952 di_flags |= XFS_DIFLAG_NODUMP;
953 if (xflags & FS_XFLAG_NODEFRAG)
954 di_flags |= XFS_DIFLAG_NODEFRAG;
955 if (xflags & FS_XFLAG_FILESTREAM)
956 di_flags |= XFS_DIFLAG_FILESTREAM;
957 if (S_ISDIR(VFS_I(ip)->i_mode)) {
958 if (xflags & FS_XFLAG_RTINHERIT)
959 di_flags |= XFS_DIFLAG_RTINHERIT;
960 if (xflags & FS_XFLAG_NOSYMLINKS)
961 di_flags |= XFS_DIFLAG_NOSYMLINKS;
962 if (xflags & FS_XFLAG_EXTSZINHERIT)
963 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
964 if (xflags & FS_XFLAG_PROJINHERIT)
965 di_flags |= XFS_DIFLAG_PROJINHERIT;
966 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
967 if (xflags & FS_XFLAG_REALTIME)
968 di_flags |= XFS_DIFLAG_REALTIME;
969 if (xflags & FS_XFLAG_EXTSIZE)
970 di_flags |= XFS_DIFLAG_EXTSIZE;
971 }
972 ip->i_d.di_flags = di_flags;
973
974 /* diflags2 only valid for v3 inodes. */
975 if (ip->i_d.di_version < 3)
976 return;
977
978 di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
979 if (xflags & FS_XFLAG_DAX)
980 di_flags2 |= XFS_DIFLAG2_DAX;
981 if (xflags & FS_XFLAG_COWEXTSIZE)
982 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
983
984 ip->i_d.di_flags2 = di_flags2;
985 }
986
987 STATIC void
988 xfs_diflags_to_linux(
989 struct xfs_inode *ip)
990 {
991 struct inode *inode = VFS_I(ip);
992 unsigned int xflags = xfs_ip2xflags(ip);
993
994 if (xflags & FS_XFLAG_IMMUTABLE)
995 inode->i_flags |= S_IMMUTABLE;
996 else
997 inode->i_flags &= ~S_IMMUTABLE;
998 if (xflags & FS_XFLAG_APPEND)
999 inode->i_flags |= S_APPEND;
1000 else
1001 inode->i_flags &= ~S_APPEND;
1002 if (xflags & FS_XFLAG_SYNC)
1003 inode->i_flags |= S_SYNC;
1004 else
1005 inode->i_flags &= ~S_SYNC;
1006 if (xflags & FS_XFLAG_NOATIME)
1007 inode->i_flags |= S_NOATIME;
1008 else
1009 inode->i_flags &= ~S_NOATIME;
1010 if (xflags & FS_XFLAG_DAX)
1011 inode->i_flags |= S_DAX;
1012 else
1013 inode->i_flags &= ~S_DAX;
1014
1015 }
1016
1017 static int
1018 xfs_ioctl_setattr_xflags(
1019 struct xfs_trans *tp,
1020 struct xfs_inode *ip,
1021 struct fsxattr *fa)
1022 {
1023 struct xfs_mount *mp = ip->i_mount;
1024
1025 /* Can't change realtime flag if any extents are allocated. */
1026 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1027 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1028 return -EINVAL;
1029
1030 /* If realtime flag is set then must have realtime device */
1031 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1032 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1033 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1034 return -EINVAL;
1035 }
1036
1037 /* Clear reflink if we are actually able to set the rt flag. */
1038 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1039 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1040
1041 /* Don't allow us to set DAX mode for a reflinked file for now. */
1042 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1043 return -EINVAL;
1044
1045 /*
1046 * Can't modify an immutable/append-only file unless
1047 * we have appropriate permission.
1048 */
1049 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1050 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1051 !capable(CAP_LINUX_IMMUTABLE))
1052 return -EPERM;
1053
1054 xfs_set_diflags(ip, fa->fsx_xflags);
1055 xfs_diflags_to_linux(ip);
1056 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1057 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1058 XFS_STATS_INC(mp, xs_ig_attrchg);
1059 return 0;
1060 }
1061
1062 /*
1063 * If we are changing DAX flags, we have to ensure the file is clean and any
1064 * cached objects in the address space are invalidated and removed. This
1065 * requires us to lock out other IO and page faults similar to a truncate
1066 * operation. The locks need to be held until the transaction has been committed
1067 * so that the cache invalidation is atomic with respect to the DAX flag
1068 * manipulation.
1069 */
1070 static int
1071 xfs_ioctl_setattr_dax_invalidate(
1072 struct xfs_inode *ip,
1073 struct fsxattr *fa,
1074 int *join_flags)
1075 {
1076 struct inode *inode = VFS_I(ip);
1077 int error;
1078
1079 *join_flags = 0;
1080
1081 /*
1082 * It is only valid to set the DAX flag on regular files and
1083 * directories on filesystems where the block size is equal to the page
1084 * size. On directories it serves as an inherit hint.
1085 */
1086 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1087 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1088 return -EINVAL;
1089 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1090 return -EINVAL;
1091 }
1092
1093 /* If the DAX state is not changing, we have nothing to do here. */
1094 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1095 return 0;
1096 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1097 return 0;
1098
1099 /* lock, flush and invalidate mapping in preparation for flag change */
1100 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1101 error = filemap_write_and_wait(inode->i_mapping);
1102 if (error)
1103 goto out_unlock;
1104 error = invalidate_inode_pages2(inode->i_mapping);
1105 if (error)
1106 goto out_unlock;
1107
1108 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1109 return 0;
1110
1111 out_unlock:
1112 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1113 return error;
1114
1115 }
1116
1117 /*
1118 * Set up the transaction structure for the setattr operation, checking that we
1119 * have permission to do so. On success, return a clean transaction and the
1120 * inode locked exclusively ready for further operation specific checks. On
1121 * failure, return an error without modifying or locking the inode.
1122 *
1123 * The inode might already be IO locked on call. If this is the case, it is
1124 * indicated in @join_flags and we take full responsibility for ensuring they
1125 * are unlocked from now on. Hence if we have an error here, we still have to
1126 * unlock them. Otherwise, once they are joined to the transaction, they will
1127 * be unlocked on commit/cancel.
1128 */
1129 static struct xfs_trans *
1130 xfs_ioctl_setattr_get_trans(
1131 struct xfs_inode *ip,
1132 int join_flags)
1133 {
1134 struct xfs_mount *mp = ip->i_mount;
1135 struct xfs_trans *tp;
1136 int error = -EROFS;
1137
1138 if (mp->m_flags & XFS_MOUNT_RDONLY)
1139 goto out_unlock;
1140 error = -EIO;
1141 if (XFS_FORCED_SHUTDOWN(mp))
1142 goto out_unlock;
1143
1144 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1145 if (error)
1146 return ERR_PTR(error);
1147
1148 xfs_ilock(ip, XFS_ILOCK_EXCL);
1149 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1150 join_flags = 0;
1151
1152 /*
1153 * CAP_FOWNER overrides the following restrictions:
1154 *
1155 * The user ID of the calling process must be equal to the file owner
1156 * ID, except in cases where the CAP_FSETID capability is applicable.
1157 */
1158 if (!inode_owner_or_capable(VFS_I(ip))) {
1159 error = -EPERM;
1160 goto out_cancel;
1161 }
1162
1163 if (mp->m_flags & XFS_MOUNT_WSYNC)
1164 xfs_trans_set_sync(tp);
1165
1166 return tp;
1167
1168 out_cancel:
1169 xfs_trans_cancel(tp);
1170 out_unlock:
1171 if (join_flags)
1172 xfs_iunlock(ip, join_flags);
1173 return ERR_PTR(error);
1174 }
1175
1176 /*
1177 * extent size hint validation is somewhat cumbersome. Rules are:
1178 *
1179 * 1. extent size hint is only valid for directories and regular files
1180 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1181 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1182 * 4. can only be changed on regular files if no extents are allocated
1183 * 5. can be changed on directories at any time
1184 * 6. extsize hint of 0 turns off hints, clears inode flags.
1185 * 7. Extent size must be a multiple of the appropriate block size.
1186 * 8. for non-realtime files, the extent size hint must be limited
1187 * to half the AG size to avoid alignment extending the extent beyond the
1188 * limits of the AG.
1189 */
1190 static int
1191 xfs_ioctl_setattr_check_extsize(
1192 struct xfs_inode *ip,
1193 struct fsxattr *fa)
1194 {
1195 struct xfs_mount *mp = ip->i_mount;
1196
1197 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1198 return -EINVAL;
1199
1200 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1201 !S_ISDIR(VFS_I(ip)->i_mode))
1202 return -EINVAL;
1203
1204 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1205 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1206 return -EINVAL;
1207
1208 if (fa->fsx_extsize != 0) {
1209 xfs_extlen_t size;
1210 xfs_fsblock_t extsize_fsb;
1211
1212 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1213 if (extsize_fsb > MAXEXTLEN)
1214 return -EINVAL;
1215
1216 if (XFS_IS_REALTIME_INODE(ip) ||
1217 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1218 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1219 } else {
1220 size = mp->m_sb.sb_blocksize;
1221 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1222 return -EINVAL;
1223 }
1224
1225 if (fa->fsx_extsize % size)
1226 return -EINVAL;
1227 } else
1228 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1229
1230 return 0;
1231 }
1232
1233 /*
1234 * CoW extent size hint validation rules are:
1235 *
1236 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1237 * The inode does not have to have any shared blocks, but it must be a v3.
1238 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1239 * for a directory, the hint is propagated to new files.
1240 * 3. Can be changed on files & directories at any time.
1241 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1242 * 5. Extent size must be a multiple of the appropriate block size.
1243 * 6. The extent size hint must be limited to half the AG size to avoid
1244 * alignment extending the extent beyond the limits of the AG.
1245 */
1246 static int
1247 xfs_ioctl_setattr_check_cowextsize(
1248 struct xfs_inode *ip,
1249 struct fsxattr *fa)
1250 {
1251 struct xfs_mount *mp = ip->i_mount;
1252
1253 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1254 return 0;
1255
1256 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1257 ip->i_d.di_version != 3)
1258 return -EINVAL;
1259
1260 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1261 return -EINVAL;
1262
1263 if (fa->fsx_cowextsize != 0) {
1264 xfs_extlen_t size;
1265 xfs_fsblock_t cowextsize_fsb;
1266
1267 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1268 if (cowextsize_fsb > MAXEXTLEN)
1269 return -EINVAL;
1270
1271 size = mp->m_sb.sb_blocksize;
1272 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1273 return -EINVAL;
1274
1275 if (fa->fsx_cowextsize % size)
1276 return -EINVAL;
1277 } else
1278 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1279
1280 return 0;
1281 }
1282
1283 static int
1284 xfs_ioctl_setattr_check_projid(
1285 struct xfs_inode *ip,
1286 struct fsxattr *fa)
1287 {
1288 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1289 if (fa->fsx_projid > (__uint16_t)-1 &&
1290 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1291 return -EINVAL;
1292
1293 /*
1294 * Project Quota ID state is only allowed to change from within the init
1295 * namespace. Enforce that restriction only if we are trying to change
1296 * the quota ID state. Everything else is allowed in user namespaces.
1297 */
1298 if (current_user_ns() == &init_user_ns)
1299 return 0;
1300
1301 if (xfs_get_projid(ip) != fa->fsx_projid)
1302 return -EINVAL;
1303 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1304 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1305 return -EINVAL;
1306
1307 return 0;
1308 }
1309
1310 STATIC int
1311 xfs_ioctl_setattr(
1312 xfs_inode_t *ip,
1313 struct fsxattr *fa)
1314 {
1315 struct xfs_mount *mp = ip->i_mount;
1316 struct xfs_trans *tp;
1317 struct xfs_dquot *udqp = NULL;
1318 struct xfs_dquot *pdqp = NULL;
1319 struct xfs_dquot *olddquot = NULL;
1320 int code;
1321 int join_flags = 0;
1322
1323 trace_xfs_ioctl_setattr(ip);
1324
1325 code = xfs_ioctl_setattr_check_projid(ip, fa);
1326 if (code)
1327 return code;
1328
1329 /*
1330 * If disk quotas is on, we make sure that the dquots do exist on disk,
1331 * before we start any other transactions. Trying to do this later
1332 * is messy. We don't care to take a readlock to look at the ids
1333 * in inode here, because we can't hold it across the trans_reserve.
1334 * If the IDs do change before we take the ilock, we're covered
1335 * because the i_*dquot fields will get updated anyway.
1336 */
1337 if (XFS_IS_QUOTA_ON(mp)) {
1338 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1339 ip->i_d.di_gid, fa->fsx_projid,
1340 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1341 if (code)
1342 return code;
1343 }
1344
1345 /*
1346 * Changing DAX config may require inode locking for mapping
1347 * invalidation. These need to be held all the way to transaction commit
1348 * or cancel time, so need to be passed through to
1349 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1350 * appropriately.
1351 */
1352 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1353 if (code)
1354 goto error_free_dquots;
1355
1356 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1357 if (IS_ERR(tp)) {
1358 code = PTR_ERR(tp);
1359 goto error_free_dquots;
1360 }
1361
1362
1363 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1364 xfs_get_projid(ip) != fa->fsx_projid) {
1365 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1366 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1367 if (code) /* out of quota */
1368 goto error_trans_cancel;
1369 }
1370
1371 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1372 if (code)
1373 goto error_trans_cancel;
1374
1375 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1376 if (code)
1377 goto error_trans_cancel;
1378
1379 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1380 if (code)
1381 goto error_trans_cancel;
1382
1383 /*
1384 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1385 * overrides the following restrictions:
1386 *
1387 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1388 * successful return from chown()
1389 */
1390
1391 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1392 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1393 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1394
1395 /* Change the ownerships and register project quota modifications */
1396 if (xfs_get_projid(ip) != fa->fsx_projid) {
1397 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1398 olddquot = xfs_qm_vop_chown(tp, ip,
1399 &ip->i_pdquot, pdqp);
1400 }
1401 ASSERT(ip->i_d.di_version > 1);
1402 xfs_set_projid(ip, fa->fsx_projid);
1403 }
1404
1405 /*
1406 * Only set the extent size hint if we've already determined that the
1407 * extent size hint should be set on the inode. If no extent size flags
1408 * are set on the inode then unconditionally clear the extent size hint.
1409 */
1410 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1411 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1412 else
1413 ip->i_d.di_extsize = 0;
1414 if (ip->i_d.di_version == 3 &&
1415 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1416 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1417 mp->m_sb.sb_blocklog;
1418 else
1419 ip->i_d.di_cowextsize = 0;
1420
1421 code = xfs_trans_commit(tp);
1422
1423 /*
1424 * Release any dquot(s) the inode had kept before chown.
1425 */
1426 xfs_qm_dqrele(olddquot);
1427 xfs_qm_dqrele(udqp);
1428 xfs_qm_dqrele(pdqp);
1429
1430 return code;
1431
1432 error_trans_cancel:
1433 xfs_trans_cancel(tp);
1434 error_free_dquots:
1435 xfs_qm_dqrele(udqp);
1436 xfs_qm_dqrele(pdqp);
1437 return code;
1438 }
1439
1440 STATIC int
1441 xfs_ioc_fssetxattr(
1442 xfs_inode_t *ip,
1443 struct file *filp,
1444 void __user *arg)
1445 {
1446 struct fsxattr fa;
1447 int error;
1448
1449 if (copy_from_user(&fa, arg, sizeof(fa)))
1450 return -EFAULT;
1451
1452 error = mnt_want_write_file(filp);
1453 if (error)
1454 return error;
1455 error = xfs_ioctl_setattr(ip, &fa);
1456 mnt_drop_write_file(filp);
1457 return error;
1458 }
1459
1460 STATIC int
1461 xfs_ioc_getxflags(
1462 xfs_inode_t *ip,
1463 void __user *arg)
1464 {
1465 unsigned int flags;
1466
1467 flags = xfs_di2lxflags(ip->i_d.di_flags);
1468 if (copy_to_user(arg, &flags, sizeof(flags)))
1469 return -EFAULT;
1470 return 0;
1471 }
1472
1473 STATIC int
1474 xfs_ioc_setxflags(
1475 struct xfs_inode *ip,
1476 struct file *filp,
1477 void __user *arg)
1478 {
1479 struct xfs_trans *tp;
1480 struct fsxattr fa;
1481 unsigned int flags;
1482 int join_flags = 0;
1483 int error;
1484
1485 if (copy_from_user(&flags, arg, sizeof(flags)))
1486 return -EFAULT;
1487
1488 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1489 FS_NOATIME_FL | FS_NODUMP_FL | \
1490 FS_SYNC_FL))
1491 return -EOPNOTSUPP;
1492
1493 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1494
1495 error = mnt_want_write_file(filp);
1496 if (error)
1497 return error;
1498
1499 /*
1500 * Changing DAX config may require inode locking for mapping
1501 * invalidation. These need to be held all the way to transaction commit
1502 * or cancel time, so need to be passed through to
1503 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1504 * appropriately.
1505 */
1506 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1507 if (error)
1508 goto out_drop_write;
1509
1510 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1511 if (IS_ERR(tp)) {
1512 error = PTR_ERR(tp);
1513 goto out_drop_write;
1514 }
1515
1516 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1517 if (error) {
1518 xfs_trans_cancel(tp);
1519 goto out_drop_write;
1520 }
1521
1522 error = xfs_trans_commit(tp);
1523 out_drop_write:
1524 mnt_drop_write_file(filp);
1525 return error;
1526 }
1527
1528 STATIC int
1529 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1530 {
1531 struct getbmap __user *base = (struct getbmap __user *)*ap;
1532
1533 /* copy only getbmap portion (not getbmapx) */
1534 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1535 return -EFAULT;
1536
1537 *ap += sizeof(struct getbmap);
1538 return 0;
1539 }
1540
1541 STATIC int
1542 xfs_ioc_getbmap(
1543 struct file *file,
1544 unsigned int cmd,
1545 void __user *arg)
1546 {
1547 struct getbmapx bmx;
1548 int error;
1549
1550 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1551 return -EFAULT;
1552
1553 if (bmx.bmv_count < 2)
1554 return -EINVAL;
1555
1556 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1557 if (file->f_mode & FMODE_NOCMTIME)
1558 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1559
1560 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
1561 (__force struct getbmap *)arg+1);
1562 if (error)
1563 return error;
1564
1565 /* copy back header - only size of getbmap */
1566 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1567 return -EFAULT;
1568 return 0;
1569 }
1570
1571 STATIC int
1572 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1573 {
1574 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1575
1576 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1577 return -EFAULT;
1578
1579 *ap += sizeof(struct getbmapx);
1580 return 0;
1581 }
1582
1583 STATIC int
1584 xfs_ioc_getbmapx(
1585 struct xfs_inode *ip,
1586 void __user *arg)
1587 {
1588 struct getbmapx bmx;
1589 int error;
1590
1591 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1592 return -EFAULT;
1593
1594 if (bmx.bmv_count < 2)
1595 return -EINVAL;
1596
1597 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1598 return -EINVAL;
1599
1600 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1601 (__force struct getbmapx *)arg+1);
1602 if (error)
1603 return error;
1604
1605 /* copy back header */
1606 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1607 return -EFAULT;
1608
1609 return 0;
1610 }
1611
1612 int
1613 xfs_ioc_swapext(
1614 xfs_swapext_t *sxp)
1615 {
1616 xfs_inode_t *ip, *tip;
1617 struct fd f, tmp;
1618 int error = 0;
1619
1620 /* Pull information for the target fd */
1621 f = fdget((int)sxp->sx_fdtarget);
1622 if (!f.file) {
1623 error = -EINVAL;
1624 goto out;
1625 }
1626
1627 if (!(f.file->f_mode & FMODE_WRITE) ||
1628 !(f.file->f_mode & FMODE_READ) ||
1629 (f.file->f_flags & O_APPEND)) {
1630 error = -EBADF;
1631 goto out_put_file;
1632 }
1633
1634 tmp = fdget((int)sxp->sx_fdtmp);
1635 if (!tmp.file) {
1636 error = -EINVAL;
1637 goto out_put_file;
1638 }
1639
1640 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1641 !(tmp.file->f_mode & FMODE_READ) ||
1642 (tmp.file->f_flags & O_APPEND)) {
1643 error = -EBADF;
1644 goto out_put_tmp_file;
1645 }
1646
1647 if (IS_SWAPFILE(file_inode(f.file)) ||
1648 IS_SWAPFILE(file_inode(tmp.file))) {
1649 error = -EINVAL;
1650 goto out_put_tmp_file;
1651 }
1652
1653 /*
1654 * We need to ensure that the fds passed in point to XFS inodes
1655 * before we cast and access them as XFS structures as we have no
1656 * control over what the user passes us here.
1657 */
1658 if (f.file->f_op != &xfs_file_operations ||
1659 tmp.file->f_op != &xfs_file_operations) {
1660 error = -EINVAL;
1661 goto out_put_tmp_file;
1662 }
1663
1664 ip = XFS_I(file_inode(f.file));
1665 tip = XFS_I(file_inode(tmp.file));
1666
1667 if (ip->i_mount != tip->i_mount) {
1668 error = -EINVAL;
1669 goto out_put_tmp_file;
1670 }
1671
1672 if (ip->i_ino == tip->i_ino) {
1673 error = -EINVAL;
1674 goto out_put_tmp_file;
1675 }
1676
1677 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1678 error = -EIO;
1679 goto out_put_tmp_file;
1680 }
1681
1682 error = xfs_swap_extents(ip, tip, sxp);
1683
1684 out_put_tmp_file:
1685 fdput(tmp);
1686 out_put_file:
1687 fdput(f);
1688 out:
1689 return error;
1690 }
1691
1692 /*
1693 * Note: some of the ioctl's return positive numbers as a
1694 * byte count indicating success, such as readlink_by_handle.
1695 * So we don't "sign flip" like most other routines. This means
1696 * true errors need to be returned as a negative value.
1697 */
1698 long
1699 xfs_file_ioctl(
1700 struct file *filp,
1701 unsigned int cmd,
1702 unsigned long p)
1703 {
1704 struct inode *inode = file_inode(filp);
1705 struct xfs_inode *ip = XFS_I(inode);
1706 struct xfs_mount *mp = ip->i_mount;
1707 void __user *arg = (void __user *)p;
1708 int error;
1709
1710 trace_xfs_file_ioctl(ip);
1711
1712 switch (cmd) {
1713 case FITRIM:
1714 return xfs_ioc_trim(mp, arg);
1715 case XFS_IOC_ALLOCSP:
1716 case XFS_IOC_FREESP:
1717 case XFS_IOC_RESVSP:
1718 case XFS_IOC_UNRESVSP:
1719 case XFS_IOC_ALLOCSP64:
1720 case XFS_IOC_FREESP64:
1721 case XFS_IOC_RESVSP64:
1722 case XFS_IOC_UNRESVSP64:
1723 case XFS_IOC_ZERO_RANGE: {
1724 xfs_flock64_t bf;
1725
1726 if (copy_from_user(&bf, arg, sizeof(bf)))
1727 return -EFAULT;
1728 return xfs_ioc_space(filp, cmd, &bf);
1729 }
1730 case XFS_IOC_DIOINFO: {
1731 struct dioattr da;
1732 xfs_buftarg_t *target =
1733 XFS_IS_REALTIME_INODE(ip) ?
1734 mp->m_rtdev_targp : mp->m_ddev_targp;
1735
1736 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1737 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1738
1739 if (copy_to_user(arg, &da, sizeof(da)))
1740 return -EFAULT;
1741 return 0;
1742 }
1743
1744 case XFS_IOC_FSBULKSTAT_SINGLE:
1745 case XFS_IOC_FSBULKSTAT:
1746 case XFS_IOC_FSINUMBERS:
1747 return xfs_ioc_bulkstat(mp, cmd, arg);
1748
1749 case XFS_IOC_FSGEOMETRY_V1:
1750 return xfs_ioc_fsgeometry_v1(mp, arg);
1751
1752 case XFS_IOC_FSGEOMETRY:
1753 return xfs_ioc_fsgeometry(mp, arg);
1754
1755 case XFS_IOC_GETVERSION:
1756 return put_user(inode->i_generation, (int __user *)arg);
1757
1758 case XFS_IOC_FSGETXATTR:
1759 return xfs_ioc_fsgetxattr(ip, 0, arg);
1760 case XFS_IOC_FSGETXATTRA:
1761 return xfs_ioc_fsgetxattr(ip, 1, arg);
1762 case XFS_IOC_FSSETXATTR:
1763 return xfs_ioc_fssetxattr(ip, filp, arg);
1764 case XFS_IOC_GETXFLAGS:
1765 return xfs_ioc_getxflags(ip, arg);
1766 case XFS_IOC_SETXFLAGS:
1767 return xfs_ioc_setxflags(ip, filp, arg);
1768
1769 case XFS_IOC_FSSETDM: {
1770 struct fsdmidata dmi;
1771
1772 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1773 return -EFAULT;
1774
1775 error = mnt_want_write_file(filp);
1776 if (error)
1777 return error;
1778
1779 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1780 dmi.fsd_dmstate);
1781 mnt_drop_write_file(filp);
1782 return error;
1783 }
1784
1785 case XFS_IOC_GETBMAP:
1786 case XFS_IOC_GETBMAPA:
1787 return xfs_ioc_getbmap(filp, cmd, arg);
1788
1789 case XFS_IOC_GETBMAPX:
1790 return xfs_ioc_getbmapx(ip, arg);
1791
1792 case XFS_IOC_FD_TO_HANDLE:
1793 case XFS_IOC_PATH_TO_HANDLE:
1794 case XFS_IOC_PATH_TO_FSHANDLE: {
1795 xfs_fsop_handlereq_t hreq;
1796
1797 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1798 return -EFAULT;
1799 return xfs_find_handle(cmd, &hreq);
1800 }
1801 case XFS_IOC_OPEN_BY_HANDLE: {
1802 xfs_fsop_handlereq_t hreq;
1803
1804 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1805 return -EFAULT;
1806 return xfs_open_by_handle(filp, &hreq);
1807 }
1808 case XFS_IOC_FSSETDM_BY_HANDLE:
1809 return xfs_fssetdm_by_handle(filp, arg);
1810
1811 case XFS_IOC_READLINK_BY_HANDLE: {
1812 xfs_fsop_handlereq_t hreq;
1813
1814 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1815 return -EFAULT;
1816 return xfs_readlink_by_handle(filp, &hreq);
1817 }
1818 case XFS_IOC_ATTRLIST_BY_HANDLE:
1819 return xfs_attrlist_by_handle(filp, arg);
1820
1821 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1822 return xfs_attrmulti_by_handle(filp, arg);
1823
1824 case XFS_IOC_SWAPEXT: {
1825 struct xfs_swapext sxp;
1826
1827 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1828 return -EFAULT;
1829 error = mnt_want_write_file(filp);
1830 if (error)
1831 return error;
1832 error = xfs_ioc_swapext(&sxp);
1833 mnt_drop_write_file(filp);
1834 return error;
1835 }
1836
1837 case XFS_IOC_FSCOUNTS: {
1838 xfs_fsop_counts_t out;
1839
1840 error = xfs_fs_counts(mp, &out);
1841 if (error)
1842 return error;
1843
1844 if (copy_to_user(arg, &out, sizeof(out)))
1845 return -EFAULT;
1846 return 0;
1847 }
1848
1849 case XFS_IOC_SET_RESBLKS: {
1850 xfs_fsop_resblks_t inout;
1851 __uint64_t in;
1852
1853 if (!capable(CAP_SYS_ADMIN))
1854 return -EPERM;
1855
1856 if (mp->m_flags & XFS_MOUNT_RDONLY)
1857 return -EROFS;
1858
1859 if (copy_from_user(&inout, arg, sizeof(inout)))
1860 return -EFAULT;
1861
1862 error = mnt_want_write_file(filp);
1863 if (error)
1864 return error;
1865
1866 /* input parameter is passed in resblks field of structure */
1867 in = inout.resblks;
1868 error = xfs_reserve_blocks(mp, &in, &inout);
1869 mnt_drop_write_file(filp);
1870 if (error)
1871 return error;
1872
1873 if (copy_to_user(arg, &inout, sizeof(inout)))
1874 return -EFAULT;
1875 return 0;
1876 }
1877
1878 case XFS_IOC_GET_RESBLKS: {
1879 xfs_fsop_resblks_t out;
1880
1881 if (!capable(CAP_SYS_ADMIN))
1882 return -EPERM;
1883
1884 error = xfs_reserve_blocks(mp, NULL, &out);
1885 if (error)
1886 return error;
1887
1888 if (copy_to_user(arg, &out, sizeof(out)))
1889 return -EFAULT;
1890
1891 return 0;
1892 }
1893
1894 case XFS_IOC_FSGROWFSDATA: {
1895 xfs_growfs_data_t in;
1896
1897 if (copy_from_user(&in, arg, sizeof(in)))
1898 return -EFAULT;
1899
1900 error = mnt_want_write_file(filp);
1901 if (error)
1902 return error;
1903 error = xfs_growfs_data(mp, &in);
1904 mnt_drop_write_file(filp);
1905 return error;
1906 }
1907
1908 case XFS_IOC_FSGROWFSLOG: {
1909 xfs_growfs_log_t in;
1910
1911 if (copy_from_user(&in, arg, sizeof(in)))
1912 return -EFAULT;
1913
1914 error = mnt_want_write_file(filp);
1915 if (error)
1916 return error;
1917 error = xfs_growfs_log(mp, &in);
1918 mnt_drop_write_file(filp);
1919 return error;
1920 }
1921
1922 case XFS_IOC_FSGROWFSRT: {
1923 xfs_growfs_rt_t in;
1924
1925 if (copy_from_user(&in, arg, sizeof(in)))
1926 return -EFAULT;
1927
1928 error = mnt_want_write_file(filp);
1929 if (error)
1930 return error;
1931 error = xfs_growfs_rt(mp, &in);
1932 mnt_drop_write_file(filp);
1933 return error;
1934 }
1935
1936 case XFS_IOC_GOINGDOWN: {
1937 __uint32_t in;
1938
1939 if (!capable(CAP_SYS_ADMIN))
1940 return -EPERM;
1941
1942 if (get_user(in, (__uint32_t __user *)arg))
1943 return -EFAULT;
1944
1945 return xfs_fs_goingdown(mp, in);
1946 }
1947
1948 case XFS_IOC_ERROR_INJECTION: {
1949 xfs_error_injection_t in;
1950
1951 if (!capable(CAP_SYS_ADMIN))
1952 return -EPERM;
1953
1954 if (copy_from_user(&in, arg, sizeof(in)))
1955 return -EFAULT;
1956
1957 return xfs_errortag_add(in.errtag, mp);
1958 }
1959
1960 case XFS_IOC_ERROR_CLEARALL:
1961 if (!capable(CAP_SYS_ADMIN))
1962 return -EPERM;
1963
1964 return xfs_errortag_clearall(mp, 1);
1965
1966 case XFS_IOC_FREE_EOFBLOCKS: {
1967 struct xfs_fs_eofblocks eofb;
1968 struct xfs_eofblocks keofb;
1969
1970 if (!capable(CAP_SYS_ADMIN))
1971 return -EPERM;
1972
1973 if (mp->m_flags & XFS_MOUNT_RDONLY)
1974 return -EROFS;
1975
1976 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1977 return -EFAULT;
1978
1979 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1980 if (error)
1981 return error;
1982
1983 return xfs_icache_free_eofblocks(mp, &keofb);
1984 }
1985
1986 default:
1987 return -ENOTTY;
1988 }
1989 }
Linux with added FPC-III support