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irqchip: Fix dependencies for archs w/o HAS_IOMEM
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blobd42738deec6de6128b1a4b0784c45b5447848d02
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 = ip->i_d.di_gen;
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 = -EACCES;
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 void *link;
281 int error;
282
283 if (!capable(CAP_SYS_ADMIN))
284 return -EPERM;
285
286 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
287 if (IS_ERR(dentry))
288 return PTR_ERR(dentry);
289
290 /* Restrict this handle operation to symlinks only. */
291 if (!d_is_symlink(dentry)) {
292 error = -EINVAL;
293 goto out_dput;
294 }
295
296 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
297 error = -EFAULT;
298 goto out_dput;
299 }
300
301 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
302 if (!link) {
303 error = -ENOMEM;
304 goto out_dput;
305 }
306
307 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
308 if (error)
309 goto out_kfree;
310 error = readlink_copy(hreq->ohandle, olen, link);
311 if (error)
312 goto out_kfree;
313
314 out_kfree:
315 kfree(link);
316 out_dput:
317 dput(dentry);
318 return error;
319 }
320
321 int
322 xfs_set_dmattrs(
323 xfs_inode_t *ip,
324 u_int evmask,
325 u_int16_t state)
326 {
327 xfs_mount_t *mp = ip->i_mount;
328 xfs_trans_t *tp;
329 int error;
330
331 if (!capable(CAP_SYS_ADMIN))
332 return -EPERM;
333
334 if (XFS_FORCED_SHUTDOWN(mp))
335 return -EIO;
336
337 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
338 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
339 if (error) {
340 xfs_trans_cancel(tp);
341 return error;
342 }
343 xfs_ilock(ip, XFS_ILOCK_EXCL);
344 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
345
346 ip->i_d.di_dmevmask = evmask;
347 ip->i_d.di_dmstate = state;
348
349 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
350 error = xfs_trans_commit(tp);
351
352 return error;
353 }
354
355 STATIC int
356 xfs_fssetdm_by_handle(
357 struct file *parfilp,
358 void __user *arg)
359 {
360 int error;
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
363 struct dentry *dentry;
364
365 if (!capable(CAP_MKNOD))
366 return -EPERM;
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 return -EFAULT;
369
370 error = mnt_want_write_file(parfilp);
371 if (error)
372 return error;
373
374 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
375 if (IS_ERR(dentry)) {
376 mnt_drop_write_file(parfilp);
377 return PTR_ERR(dentry);
378 }
379
380 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
381 error = -EPERM;
382 goto out;
383 }
384
385 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
386 error = -EFAULT;
387 goto out;
388 }
389
390 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
391 fsd.fsd_dmstate);
392
393 out:
394 mnt_drop_write_file(parfilp);
395 dput(dentry);
396 return error;
397 }
398
399 STATIC int
400 xfs_attrlist_by_handle(
401 struct file *parfilp,
402 void __user *arg)
403 {
404 int error = -ENOMEM;
405 attrlist_cursor_kern_t *cursor;
406 xfs_fsop_attrlist_handlereq_t al_hreq;
407 struct dentry *dentry;
408 char *kbuf;
409
410 if (!capable(CAP_SYS_ADMIN))
411 return -EPERM;
412 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
413 return -EFAULT;
414 if (al_hreq.buflen < sizeof(struct attrlist) ||
415 al_hreq.buflen > XFS_XATTR_LIST_MAX)
416 return -EINVAL;
417
418 /*
419 * Reject flags, only allow namespaces.
420 */
421 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
422 return -EINVAL;
423
424 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
425 if (IS_ERR(dentry))
426 return PTR_ERR(dentry);
427
428 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
429 if (!kbuf)
430 goto out_dput;
431
432 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
433 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
434 al_hreq.flags, cursor);
435 if (error)
436 goto out_kfree;
437
438 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
439 error = -EFAULT;
440
441 out_kfree:
442 kmem_free(kbuf);
443 out_dput:
444 dput(dentry);
445 return error;
446 }
447
448 int
449 xfs_attrmulti_attr_get(
450 struct inode *inode,
451 unsigned char *name,
452 unsigned char __user *ubuf,
453 __uint32_t *len,
454 __uint32_t flags)
455 {
456 unsigned char *kbuf;
457 int error = -EFAULT;
458
459 if (*len > XFS_XATTR_SIZE_MAX)
460 return -EINVAL;
461 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
462 if (!kbuf)
463 return -ENOMEM;
464
465 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
466 if (error)
467 goto out_kfree;
468
469 if (copy_to_user(ubuf, kbuf, *len))
470 error = -EFAULT;
471
472 out_kfree:
473 kmem_free(kbuf);
474 return error;
475 }
476
477 int
478 xfs_attrmulti_attr_set(
479 struct inode *inode,
480 unsigned char *name,
481 const unsigned char __user *ubuf,
482 __uint32_t len,
483 __uint32_t flags)
484 {
485 unsigned char *kbuf;
486 int error;
487
488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
489 return -EPERM;
490 if (len > XFS_XATTR_SIZE_MAX)
491 return -EINVAL;
492
493 kbuf = memdup_user(ubuf, len);
494 if (IS_ERR(kbuf))
495 return PTR_ERR(kbuf);
496
497 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
498 if (!error)
499 xfs_forget_acl(inode, name, flags);
500 kfree(kbuf);
501 return error;
502 }
503
504 int
505 xfs_attrmulti_attr_remove(
506 struct inode *inode,
507 unsigned char *name,
508 __uint32_t flags)
509 {
510 int error;
511
512 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
513 return -EPERM;
514 error = xfs_attr_remove(XFS_I(inode), name, flags);
515 if (!error)
516 xfs_forget_acl(inode, name, flags);
517 return error;
518 }
519
520 STATIC int
521 xfs_attrmulti_by_handle(
522 struct file *parfilp,
523 void __user *arg)
524 {
525 int error;
526 xfs_attr_multiop_t *ops;
527 xfs_fsop_attrmulti_handlereq_t am_hreq;
528 struct dentry *dentry;
529 unsigned int i, size;
530 unsigned char *attr_name;
531
532 if (!capable(CAP_SYS_ADMIN))
533 return -EPERM;
534 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
535 return -EFAULT;
536
537 /* overflow check */
538 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
539 return -E2BIG;
540
541 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
542 if (IS_ERR(dentry))
543 return PTR_ERR(dentry);
544
545 error = -E2BIG;
546 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
547 if (!size || size > 16 * PAGE_SIZE)
548 goto out_dput;
549
550 ops = memdup_user(am_hreq.ops, size);
551 if (IS_ERR(ops)) {
552 error = PTR_ERR(ops);
553 goto out_dput;
554 }
555
556 error = -ENOMEM;
557 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
558 if (!attr_name)
559 goto out_kfree_ops;
560
561 error = 0;
562 for (i = 0; i < am_hreq.opcount; i++) {
563 ops[i].am_error = strncpy_from_user((char *)attr_name,
564 ops[i].am_attrname, MAXNAMELEN);
565 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
566 error = -ERANGE;
567 if (ops[i].am_error < 0)
568 break;
569
570 switch (ops[i].am_opcode) {
571 case ATTR_OP_GET:
572 ops[i].am_error = xfs_attrmulti_attr_get(
573 d_inode(dentry), attr_name,
574 ops[i].am_attrvalue, &ops[i].am_length,
575 ops[i].am_flags);
576 break;
577 case ATTR_OP_SET:
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_set(
582 d_inode(dentry), attr_name,
583 ops[i].am_attrvalue, ops[i].am_length,
584 ops[i].am_flags);
585 mnt_drop_write_file(parfilp);
586 break;
587 case ATTR_OP_REMOVE:
588 ops[i].am_error = mnt_want_write_file(parfilp);
589 if (ops[i].am_error)
590 break;
591 ops[i].am_error = xfs_attrmulti_attr_remove(
592 d_inode(dentry), attr_name,
593 ops[i].am_flags);
594 mnt_drop_write_file(parfilp);
595 break;
596 default:
597 ops[i].am_error = -EINVAL;
598 }
599 }
600
601 if (copy_to_user(am_hreq.ops, ops, size))
602 error = -EFAULT;
603
604 kfree(attr_name);
605 out_kfree_ops:
606 kfree(ops);
607 out_dput:
608 dput(dentry);
609 return error;
610 }
611
612 int
613 xfs_ioc_space(
614 struct xfs_inode *ip,
615 struct inode *inode,
616 struct file *filp,
617 int ioflags,
618 unsigned int cmd,
619 xfs_flock64_t *bf)
620 {
621 struct iattr iattr;
622 enum xfs_prealloc_flags flags = 0;
623 uint iolock = XFS_IOLOCK_EXCL;
624 int error;
625
626 /*
627 * Only allow the sys admin to reserve space unless
628 * unwritten extents are enabled.
629 */
630 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
631 !capable(CAP_SYS_ADMIN))
632 return -EPERM;
633
634 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
635 return -EPERM;
636
637 if (!(filp->f_mode & FMODE_WRITE))
638 return -EBADF;
639
640 if (!S_ISREG(inode->i_mode))
641 return -EINVAL;
642
643 if (filp->f_flags & O_DSYNC)
644 flags |= XFS_PREALLOC_SYNC;
645 if (ioflags & XFS_IO_INVIS)
646 flags |= XFS_PREALLOC_INVISIBLE;
647
648 error = mnt_want_write_file(filp);
649 if (error)
650 return error;
651
652 xfs_ilock(ip, iolock);
653 error = xfs_break_layouts(inode, &iolock, false);
654 if (error)
655 goto out_unlock;
656
657 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
658 iolock |= XFS_MMAPLOCK_EXCL;
659
660 switch (bf->l_whence) {
661 case 0: /*SEEK_SET*/
662 break;
663 case 1: /*SEEK_CUR*/
664 bf->l_start += filp->f_pos;
665 break;
666 case 2: /*SEEK_END*/
667 bf->l_start += XFS_ISIZE(ip);
668 break;
669 default:
670 error = -EINVAL;
671 goto out_unlock;
672 }
673
674 /*
675 * length of <= 0 for resv/unresv/zero is invalid. length for
676 * alloc/free is ignored completely and we have no idea what userspace
677 * might have set it to, so set it to zero to allow range
678 * checks to pass.
679 */
680 switch (cmd) {
681 case XFS_IOC_ZERO_RANGE:
682 case XFS_IOC_RESVSP:
683 case XFS_IOC_RESVSP64:
684 case XFS_IOC_UNRESVSP:
685 case XFS_IOC_UNRESVSP64:
686 if (bf->l_len <= 0) {
687 error = -EINVAL;
688 goto out_unlock;
689 }
690 break;
691 default:
692 bf->l_len = 0;
693 break;
694 }
695
696 if (bf->l_start < 0 ||
697 bf->l_start > inode->i_sb->s_maxbytes ||
698 bf->l_start + bf->l_len < 0 ||
699 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
700 error = -EINVAL;
701 goto out_unlock;
702 }
703
704 switch (cmd) {
705 case XFS_IOC_ZERO_RANGE:
706 flags |= XFS_PREALLOC_SET;
707 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
708 break;
709 case XFS_IOC_RESVSP:
710 case XFS_IOC_RESVSP64:
711 flags |= XFS_PREALLOC_SET;
712 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
713 XFS_BMAPI_PREALLOC);
714 break;
715 case XFS_IOC_UNRESVSP:
716 case XFS_IOC_UNRESVSP64:
717 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
718 break;
719 case XFS_IOC_ALLOCSP:
720 case XFS_IOC_ALLOCSP64:
721 case XFS_IOC_FREESP:
722 case XFS_IOC_FREESP64:
723 flags |= XFS_PREALLOC_CLEAR;
724 if (bf->l_start > XFS_ISIZE(ip)) {
725 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
726 bf->l_start - XFS_ISIZE(ip), 0);
727 if (error)
728 goto out_unlock;
729 }
730
731 iattr.ia_valid = ATTR_SIZE;
732 iattr.ia_size = bf->l_start;
733
734 error = xfs_setattr_size(ip, &iattr);
735 break;
736 default:
737 ASSERT(0);
738 error = -EINVAL;
739 }
740
741 if (error)
742 goto out_unlock;
743
744 error = xfs_update_prealloc_flags(ip, flags);
745
746 out_unlock:
747 xfs_iunlock(ip, iolock);
748 mnt_drop_write_file(filp);
749 return error;
750 }
751
752 STATIC int
753 xfs_ioc_bulkstat(
754 xfs_mount_t *mp,
755 unsigned int cmd,
756 void __user *arg)
757 {
758 xfs_fsop_bulkreq_t bulkreq;
759 int count; /* # of records returned */
760 xfs_ino_t inlast; /* last inode number */
761 int done;
762 int error;
763
764 /* done = 1 if there are more stats to get and if bulkstat */
765 /* should be called again (unused here, but used in dmapi) */
766
767 if (!capable(CAP_SYS_ADMIN))
768 return -EPERM;
769
770 if (XFS_FORCED_SHUTDOWN(mp))
771 return -EIO;
772
773 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
774 return -EFAULT;
775
776 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
777 return -EFAULT;
778
779 if ((count = bulkreq.icount) <= 0)
780 return -EINVAL;
781
782 if (bulkreq.ubuffer == NULL)
783 return -EINVAL;
784
785 if (cmd == XFS_IOC_FSINUMBERS)
786 error = xfs_inumbers(mp, &inlast, &count,
787 bulkreq.ubuffer, xfs_inumbers_fmt);
788 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
789 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
790 sizeof(xfs_bstat_t), NULL, &done);
791 else /* XFS_IOC_FSBULKSTAT */
792 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
793 sizeof(xfs_bstat_t), bulkreq.ubuffer,
794 &done);
795
796 if (error)
797 return error;
798
799 if (bulkreq.ocount != NULL) {
800 if (copy_to_user(bulkreq.lastip, &inlast,
801 sizeof(xfs_ino_t)))
802 return -EFAULT;
803
804 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
805 return -EFAULT;
806 }
807
808 return 0;
809 }
810
811 STATIC int
812 xfs_ioc_fsgeometry_v1(
813 xfs_mount_t *mp,
814 void __user *arg)
815 {
816 xfs_fsop_geom_t fsgeo;
817 int error;
818
819 error = xfs_fs_geometry(mp, &fsgeo, 3);
820 if (error)
821 return error;
822
823 /*
824 * Caller should have passed an argument of type
825 * xfs_fsop_geom_v1_t. This is a proper subset of the
826 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
827 */
828 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
829 return -EFAULT;
830 return 0;
831 }
832
833 STATIC int
834 xfs_ioc_fsgeometry(
835 xfs_mount_t *mp,
836 void __user *arg)
837 {
838 xfs_fsop_geom_t fsgeo;
839 int error;
840
841 error = xfs_fs_geometry(mp, &fsgeo, 4);
842 if (error)
843 return error;
844
845 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
846 return -EFAULT;
847 return 0;
848 }
849
850 /*
851 * Linux extended inode flags interface.
852 */
853
854 STATIC unsigned int
855 xfs_merge_ioc_xflags(
856 unsigned int flags,
857 unsigned int start)
858 {
859 unsigned int xflags = start;
860
861 if (flags & FS_IMMUTABLE_FL)
862 xflags |= XFS_XFLAG_IMMUTABLE;
863 else
864 xflags &= ~XFS_XFLAG_IMMUTABLE;
865 if (flags & FS_APPEND_FL)
866 xflags |= XFS_XFLAG_APPEND;
867 else
868 xflags &= ~XFS_XFLAG_APPEND;
869 if (flags & FS_SYNC_FL)
870 xflags |= XFS_XFLAG_SYNC;
871 else
872 xflags &= ~XFS_XFLAG_SYNC;
873 if (flags & FS_NOATIME_FL)
874 xflags |= XFS_XFLAG_NOATIME;
875 else
876 xflags &= ~XFS_XFLAG_NOATIME;
877 if (flags & FS_NODUMP_FL)
878 xflags |= XFS_XFLAG_NODUMP;
879 else
880 xflags &= ~XFS_XFLAG_NODUMP;
881
882 return xflags;
883 }
884
885 STATIC unsigned int
886 xfs_di2lxflags(
887 __uint16_t di_flags)
888 {
889 unsigned int flags = 0;
890
891 if (di_flags & XFS_DIFLAG_IMMUTABLE)
892 flags |= FS_IMMUTABLE_FL;
893 if (di_flags & XFS_DIFLAG_APPEND)
894 flags |= FS_APPEND_FL;
895 if (di_flags & XFS_DIFLAG_SYNC)
896 flags |= FS_SYNC_FL;
897 if (di_flags & XFS_DIFLAG_NOATIME)
898 flags |= FS_NOATIME_FL;
899 if (di_flags & XFS_DIFLAG_NODUMP)
900 flags |= FS_NODUMP_FL;
901 return flags;
902 }
903
904 STATIC int
905 xfs_ioc_fsgetxattr(
906 xfs_inode_t *ip,
907 int attr,
908 void __user *arg)
909 {
910 struct fsxattr fa;
911
912 memset(&fa, 0, sizeof(struct fsxattr));
913
914 xfs_ilock(ip, XFS_ILOCK_SHARED);
915 fa.fsx_xflags = xfs_ip2xflags(ip);
916 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
917 fa.fsx_projid = xfs_get_projid(ip);
918
919 if (attr) {
920 if (ip->i_afp) {
921 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
922 fa.fsx_nextents = ip->i_afp->if_bytes /
923 sizeof(xfs_bmbt_rec_t);
924 else
925 fa.fsx_nextents = ip->i_d.di_anextents;
926 } else
927 fa.fsx_nextents = 0;
928 } else {
929 if (ip->i_df.if_flags & XFS_IFEXTENTS)
930 fa.fsx_nextents = ip->i_df.if_bytes /
931 sizeof(xfs_bmbt_rec_t);
932 else
933 fa.fsx_nextents = ip->i_d.di_nextents;
934 }
935 xfs_iunlock(ip, XFS_ILOCK_SHARED);
936
937 if (copy_to_user(arg, &fa, sizeof(fa)))
938 return -EFAULT;
939 return 0;
940 }
941
942 STATIC void
943 xfs_set_diflags(
944 struct xfs_inode *ip,
945 unsigned int xflags)
946 {
947 unsigned int di_flags;
948
949 /* can't set PREALLOC this way, just preserve it */
950 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
951 if (xflags & XFS_XFLAG_IMMUTABLE)
952 di_flags |= XFS_DIFLAG_IMMUTABLE;
953 if (xflags & XFS_XFLAG_APPEND)
954 di_flags |= XFS_DIFLAG_APPEND;
955 if (xflags & XFS_XFLAG_SYNC)
956 di_flags |= XFS_DIFLAG_SYNC;
957 if (xflags & XFS_XFLAG_NOATIME)
958 di_flags |= XFS_DIFLAG_NOATIME;
959 if (xflags & XFS_XFLAG_NODUMP)
960 di_flags |= XFS_DIFLAG_NODUMP;
961 if (xflags & XFS_XFLAG_NODEFRAG)
962 di_flags |= XFS_DIFLAG_NODEFRAG;
963 if (xflags & XFS_XFLAG_FILESTREAM)
964 di_flags |= XFS_DIFLAG_FILESTREAM;
965 if (S_ISDIR(ip->i_d.di_mode)) {
966 if (xflags & XFS_XFLAG_RTINHERIT)
967 di_flags |= XFS_DIFLAG_RTINHERIT;
968 if (xflags & XFS_XFLAG_NOSYMLINKS)
969 di_flags |= XFS_DIFLAG_NOSYMLINKS;
970 if (xflags & XFS_XFLAG_EXTSZINHERIT)
971 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
972 if (xflags & XFS_XFLAG_PROJINHERIT)
973 di_flags |= XFS_DIFLAG_PROJINHERIT;
974 } else if (S_ISREG(ip->i_d.di_mode)) {
975 if (xflags & XFS_XFLAG_REALTIME)
976 di_flags |= XFS_DIFLAG_REALTIME;
977 if (xflags & XFS_XFLAG_EXTSIZE)
978 di_flags |= XFS_DIFLAG_EXTSIZE;
979 }
980
981 ip->i_d.di_flags = di_flags;
982 }
983
984 STATIC void
985 xfs_diflags_to_linux(
986 struct xfs_inode *ip)
987 {
988 struct inode *inode = VFS_I(ip);
989 unsigned int xflags = xfs_ip2xflags(ip);
990
991 if (xflags & XFS_XFLAG_IMMUTABLE)
992 inode->i_flags |= S_IMMUTABLE;
993 else
994 inode->i_flags &= ~S_IMMUTABLE;
995 if (xflags & XFS_XFLAG_APPEND)
996 inode->i_flags |= S_APPEND;
997 else
998 inode->i_flags &= ~S_APPEND;
999 if (xflags & XFS_XFLAG_SYNC)
1000 inode->i_flags |= S_SYNC;
1001 else
1002 inode->i_flags &= ~S_SYNC;
1003 if (xflags & XFS_XFLAG_NOATIME)
1004 inode->i_flags |= S_NOATIME;
1005 else
1006 inode->i_flags &= ~S_NOATIME;
1007 }
1008
1009 static int
1010 xfs_ioctl_setattr_xflags(
1011 struct xfs_trans *tp,
1012 struct xfs_inode *ip,
1013 struct fsxattr *fa)
1014 {
1015 struct xfs_mount *mp = ip->i_mount;
1016
1017 /* Can't change realtime flag if any extents are allocated. */
1018 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1019 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME))
1020 return -EINVAL;
1021
1022 /* If realtime flag is set then must have realtime device */
1023 if (fa->fsx_xflags & XFS_XFLAG_REALTIME) {
1024 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1025 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1026 return -EINVAL;
1027 }
1028
1029 /*
1030 * Can't modify an immutable/append-only file unless
1031 * we have appropriate permission.
1032 */
1033 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1034 (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1035 !capable(CAP_LINUX_IMMUTABLE))
1036 return -EPERM;
1037
1038 xfs_set_diflags(ip, fa->fsx_xflags);
1039 xfs_diflags_to_linux(ip);
1040 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1041 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1042 XFS_STATS_INC(mp, xs_ig_attrchg);
1043 return 0;
1044 }
1045
1046 /*
1047 * Set up the transaction structure for the setattr operation, checking that we
1048 * have permission to do so. On success, return a clean transaction and the
1049 * inode locked exclusively ready for further operation specific checks. On
1050 * failure, return an error without modifying or locking the inode.
1051 */
1052 static struct xfs_trans *
1053 xfs_ioctl_setattr_get_trans(
1054 struct xfs_inode *ip)
1055 {
1056 struct xfs_mount *mp = ip->i_mount;
1057 struct xfs_trans *tp;
1058 int error;
1059
1060 if (mp->m_flags & XFS_MOUNT_RDONLY)
1061 return ERR_PTR(-EROFS);
1062 if (XFS_FORCED_SHUTDOWN(mp))
1063 return ERR_PTR(-EIO);
1064
1065 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1066 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1067 if (error)
1068 goto out_cancel;
1069
1070 xfs_ilock(ip, XFS_ILOCK_EXCL);
1071 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1072
1073 /*
1074 * CAP_FOWNER overrides the following restrictions:
1075 *
1076 * The user ID of the calling process must be equal to the file owner
1077 * ID, except in cases where the CAP_FSETID capability is applicable.
1078 */
1079 if (!inode_owner_or_capable(VFS_I(ip))) {
1080 error = -EPERM;
1081 goto out_cancel;
1082 }
1083
1084 if (mp->m_flags & XFS_MOUNT_WSYNC)
1085 xfs_trans_set_sync(tp);
1086
1087 return tp;
1088
1089 out_cancel:
1090 xfs_trans_cancel(tp);
1091 return ERR_PTR(error);
1092 }
1093
1094 /*
1095 * extent size hint validation is somewhat cumbersome. Rules are:
1096 *
1097 * 1. extent size hint is only valid for directories and regular files
1098 * 2. XFS_XFLAG_EXTSIZE is only valid for regular files
1099 * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories.
1100 * 4. can only be changed on regular files if no extents are allocated
1101 * 5. can be changed on directories at any time
1102 * 6. extsize hint of 0 turns off hints, clears inode flags.
1103 * 7. Extent size must be a multiple of the appropriate block size.
1104 * 8. for non-realtime files, the extent size hint must be limited
1105 * to half the AG size to avoid alignment extending the extent beyond the
1106 * limits of the AG.
1107 */
1108 static int
1109 xfs_ioctl_setattr_check_extsize(
1110 struct xfs_inode *ip,
1111 struct fsxattr *fa)
1112 {
1113 struct xfs_mount *mp = ip->i_mount;
1114
1115 if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
1116 return -EINVAL;
1117
1118 if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) &&
1119 !S_ISDIR(ip->i_d.di_mode))
1120 return -EINVAL;
1121
1122 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents &&
1123 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1124 return -EINVAL;
1125
1126 if (fa->fsx_extsize != 0) {
1127 xfs_extlen_t size;
1128 xfs_fsblock_t extsize_fsb;
1129
1130 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1131 if (extsize_fsb > MAXEXTLEN)
1132 return -EINVAL;
1133
1134 if (XFS_IS_REALTIME_INODE(ip) ||
1135 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1136 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1137 } else {
1138 size = mp->m_sb.sb_blocksize;
1139 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1140 return -EINVAL;
1141 }
1142
1143 if (fa->fsx_extsize % size)
1144 return -EINVAL;
1145 } else
1146 fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT);
1147
1148 return 0;
1149 }
1150
1151 static int
1152 xfs_ioctl_setattr_check_projid(
1153 struct xfs_inode *ip,
1154 struct fsxattr *fa)
1155 {
1156 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1157 if (fa->fsx_projid > (__uint16_t)-1 &&
1158 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1159 return -EINVAL;
1160
1161 /*
1162 * Project Quota ID state is only allowed to change from within the init
1163 * namespace. Enforce that restriction only if we are trying to change
1164 * the quota ID state. Everything else is allowed in user namespaces.
1165 */
1166 if (current_user_ns() == &init_user_ns)
1167 return 0;
1168
1169 if (xfs_get_projid(ip) != fa->fsx_projid)
1170 return -EINVAL;
1171 if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) !=
1172 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1173 return -EINVAL;
1174
1175 return 0;
1176 }
1177
1178 STATIC int
1179 xfs_ioctl_setattr(
1180 xfs_inode_t *ip,
1181 struct fsxattr *fa)
1182 {
1183 struct xfs_mount *mp = ip->i_mount;
1184 struct xfs_trans *tp;
1185 struct xfs_dquot *udqp = NULL;
1186 struct xfs_dquot *pdqp = NULL;
1187 struct xfs_dquot *olddquot = NULL;
1188 int code;
1189
1190 trace_xfs_ioctl_setattr(ip);
1191
1192 code = xfs_ioctl_setattr_check_projid(ip, fa);
1193 if (code)
1194 return code;
1195
1196 /*
1197 * If disk quotas is on, we make sure that the dquots do exist on disk,
1198 * before we start any other transactions. Trying to do this later
1199 * is messy. We don't care to take a readlock to look at the ids
1200 * in inode here, because we can't hold it across the trans_reserve.
1201 * If the IDs do change before we take the ilock, we're covered
1202 * because the i_*dquot fields will get updated anyway.
1203 */
1204 if (XFS_IS_QUOTA_ON(mp)) {
1205 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1206 ip->i_d.di_gid, fa->fsx_projid,
1207 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1208 if (code)
1209 return code;
1210 }
1211
1212 tp = xfs_ioctl_setattr_get_trans(ip);
1213 if (IS_ERR(tp)) {
1214 code = PTR_ERR(tp);
1215 goto error_free_dquots;
1216 }
1217
1218
1219 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1220 xfs_get_projid(ip) != fa->fsx_projid) {
1221 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1222 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1223 if (code) /* out of quota */
1224 goto error_trans_cancel;
1225 }
1226
1227 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1228 if (code)
1229 goto error_trans_cancel;
1230
1231 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1232 if (code)
1233 goto error_trans_cancel;
1234
1235 /*
1236 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1237 * overrides the following restrictions:
1238 *
1239 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1240 * successful return from chown()
1241 */
1242
1243 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1244 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1245 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1246
1247 /* Change the ownerships and register project quota modifications */
1248 if (xfs_get_projid(ip) != fa->fsx_projid) {
1249 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1250 olddquot = xfs_qm_vop_chown(tp, ip,
1251 &ip->i_pdquot, pdqp);
1252 }
1253 ASSERT(ip->i_d.di_version > 1);
1254 xfs_set_projid(ip, fa->fsx_projid);
1255 }
1256
1257 /*
1258 * Only set the extent size hint if we've already determined that the
1259 * extent size hint should be set on the inode. If no extent size flags
1260 * are set on the inode then unconditionally clear the extent size hint.
1261 */
1262 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1263 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1264 else
1265 ip->i_d.di_extsize = 0;
1266
1267 code = xfs_trans_commit(tp);
1268
1269 /*
1270 * Release any dquot(s) the inode had kept before chown.
1271 */
1272 xfs_qm_dqrele(olddquot);
1273 xfs_qm_dqrele(udqp);
1274 xfs_qm_dqrele(pdqp);
1275
1276 return code;
1277
1278 error_trans_cancel:
1279 xfs_trans_cancel(tp);
1280 error_free_dquots:
1281 xfs_qm_dqrele(udqp);
1282 xfs_qm_dqrele(pdqp);
1283 return code;
1284 }
1285
1286 STATIC int
1287 xfs_ioc_fssetxattr(
1288 xfs_inode_t *ip,
1289 struct file *filp,
1290 void __user *arg)
1291 {
1292 struct fsxattr fa;
1293 int error;
1294
1295 if (copy_from_user(&fa, arg, sizeof(fa)))
1296 return -EFAULT;
1297
1298 error = mnt_want_write_file(filp);
1299 if (error)
1300 return error;
1301 error = xfs_ioctl_setattr(ip, &fa);
1302 mnt_drop_write_file(filp);
1303 return error;
1304 }
1305
1306 STATIC int
1307 xfs_ioc_getxflags(
1308 xfs_inode_t *ip,
1309 void __user *arg)
1310 {
1311 unsigned int flags;
1312
1313 flags = xfs_di2lxflags(ip->i_d.di_flags);
1314 if (copy_to_user(arg, &flags, sizeof(flags)))
1315 return -EFAULT;
1316 return 0;
1317 }
1318
1319 STATIC int
1320 xfs_ioc_setxflags(
1321 struct xfs_inode *ip,
1322 struct file *filp,
1323 void __user *arg)
1324 {
1325 struct xfs_trans *tp;
1326 struct fsxattr fa;
1327 unsigned int flags;
1328 int error;
1329
1330 if (copy_from_user(&flags, arg, sizeof(flags)))
1331 return -EFAULT;
1332
1333 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1334 FS_NOATIME_FL | FS_NODUMP_FL | \
1335 FS_SYNC_FL))
1336 return -EOPNOTSUPP;
1337
1338 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1339
1340 error = mnt_want_write_file(filp);
1341 if (error)
1342 return error;
1343
1344 tp = xfs_ioctl_setattr_get_trans(ip);
1345 if (IS_ERR(tp)) {
1346 error = PTR_ERR(tp);
1347 goto out_drop_write;
1348 }
1349
1350 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1351 if (error) {
1352 xfs_trans_cancel(tp);
1353 goto out_drop_write;
1354 }
1355
1356 error = xfs_trans_commit(tp);
1357 out_drop_write:
1358 mnt_drop_write_file(filp);
1359 return error;
1360 }
1361
1362 STATIC int
1363 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1364 {
1365 struct getbmap __user *base = (struct getbmap __user *)*ap;
1366
1367 /* copy only getbmap portion (not getbmapx) */
1368 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1369 return -EFAULT;
1370
1371 *ap += sizeof(struct getbmap);
1372 return 0;
1373 }
1374
1375 STATIC int
1376 xfs_ioc_getbmap(
1377 struct xfs_inode *ip,
1378 int ioflags,
1379 unsigned int cmd,
1380 void __user *arg)
1381 {
1382 struct getbmapx bmx;
1383 int error;
1384
1385 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1386 return -EFAULT;
1387
1388 if (bmx.bmv_count < 2)
1389 return -EINVAL;
1390
1391 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1392 if (ioflags & XFS_IO_INVIS)
1393 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1394
1395 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1396 (__force struct getbmap *)arg+1);
1397 if (error)
1398 return error;
1399
1400 /* copy back header - only size of getbmap */
1401 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1402 return -EFAULT;
1403 return 0;
1404 }
1405
1406 STATIC int
1407 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1408 {
1409 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1410
1411 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1412 return -EFAULT;
1413
1414 *ap += sizeof(struct getbmapx);
1415 return 0;
1416 }
1417
1418 STATIC int
1419 xfs_ioc_getbmapx(
1420 struct xfs_inode *ip,
1421 void __user *arg)
1422 {
1423 struct getbmapx bmx;
1424 int error;
1425
1426 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1427 return -EFAULT;
1428
1429 if (bmx.bmv_count < 2)
1430 return -EINVAL;
1431
1432 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1433 return -EINVAL;
1434
1435 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1436 (__force struct getbmapx *)arg+1);
1437 if (error)
1438 return error;
1439
1440 /* copy back header */
1441 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1442 return -EFAULT;
1443
1444 return 0;
1445 }
1446
1447 int
1448 xfs_ioc_swapext(
1449 xfs_swapext_t *sxp)
1450 {
1451 xfs_inode_t *ip, *tip;
1452 struct fd f, tmp;
1453 int error = 0;
1454
1455 /* Pull information for the target fd */
1456 f = fdget((int)sxp->sx_fdtarget);
1457 if (!f.file) {
1458 error = -EINVAL;
1459 goto out;
1460 }
1461
1462 if (!(f.file->f_mode & FMODE_WRITE) ||
1463 !(f.file->f_mode & FMODE_READ) ||
1464 (f.file->f_flags & O_APPEND)) {
1465 error = -EBADF;
1466 goto out_put_file;
1467 }
1468
1469 tmp = fdget((int)sxp->sx_fdtmp);
1470 if (!tmp.file) {
1471 error = -EINVAL;
1472 goto out_put_file;
1473 }
1474
1475 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1476 !(tmp.file->f_mode & FMODE_READ) ||
1477 (tmp.file->f_flags & O_APPEND)) {
1478 error = -EBADF;
1479 goto out_put_tmp_file;
1480 }
1481
1482 if (IS_SWAPFILE(file_inode(f.file)) ||
1483 IS_SWAPFILE(file_inode(tmp.file))) {
1484 error = -EINVAL;
1485 goto out_put_tmp_file;
1486 }
1487
1488 ip = XFS_I(file_inode(f.file));
1489 tip = XFS_I(file_inode(tmp.file));
1490
1491 if (ip->i_mount != tip->i_mount) {
1492 error = -EINVAL;
1493 goto out_put_tmp_file;
1494 }
1495
1496 if (ip->i_ino == tip->i_ino) {
1497 error = -EINVAL;
1498 goto out_put_tmp_file;
1499 }
1500
1501 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1502 error = -EIO;
1503 goto out_put_tmp_file;
1504 }
1505
1506 error = xfs_swap_extents(ip, tip, sxp);
1507
1508 out_put_tmp_file:
1509 fdput(tmp);
1510 out_put_file:
1511 fdput(f);
1512 out:
1513 return error;
1514 }
1515
1516 /*
1517 * Note: some of the ioctl's return positive numbers as a
1518 * byte count indicating success, such as readlink_by_handle.
1519 * So we don't "sign flip" like most other routines. This means
1520 * true errors need to be returned as a negative value.
1521 */
1522 long
1523 xfs_file_ioctl(
1524 struct file *filp,
1525 unsigned int cmd,
1526 unsigned long p)
1527 {
1528 struct inode *inode = file_inode(filp);
1529 struct xfs_inode *ip = XFS_I(inode);
1530 struct xfs_mount *mp = ip->i_mount;
1531 void __user *arg = (void __user *)p;
1532 int ioflags = 0;
1533 int error;
1534
1535 if (filp->f_mode & FMODE_NOCMTIME)
1536 ioflags |= XFS_IO_INVIS;
1537
1538 trace_xfs_file_ioctl(ip);
1539
1540 switch (cmd) {
1541 case FITRIM:
1542 return xfs_ioc_trim(mp, arg);
1543 case XFS_IOC_ALLOCSP:
1544 case XFS_IOC_FREESP:
1545 case XFS_IOC_RESVSP:
1546 case XFS_IOC_UNRESVSP:
1547 case XFS_IOC_ALLOCSP64:
1548 case XFS_IOC_FREESP64:
1549 case XFS_IOC_RESVSP64:
1550 case XFS_IOC_UNRESVSP64:
1551 case XFS_IOC_ZERO_RANGE: {
1552 xfs_flock64_t bf;
1553
1554 if (copy_from_user(&bf, arg, sizeof(bf)))
1555 return -EFAULT;
1556 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1557 }
1558 case XFS_IOC_DIOINFO: {
1559 struct dioattr da;
1560 xfs_buftarg_t *target =
1561 XFS_IS_REALTIME_INODE(ip) ?
1562 mp->m_rtdev_targp : mp->m_ddev_targp;
1563
1564 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1565 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1566
1567 if (copy_to_user(arg, &da, sizeof(da)))
1568 return -EFAULT;
1569 return 0;
1570 }
1571
1572 case XFS_IOC_FSBULKSTAT_SINGLE:
1573 case XFS_IOC_FSBULKSTAT:
1574 case XFS_IOC_FSINUMBERS:
1575 return xfs_ioc_bulkstat(mp, cmd, arg);
1576
1577 case XFS_IOC_FSGEOMETRY_V1:
1578 return xfs_ioc_fsgeometry_v1(mp, arg);
1579
1580 case XFS_IOC_FSGEOMETRY:
1581 return xfs_ioc_fsgeometry(mp, arg);
1582
1583 case XFS_IOC_GETVERSION:
1584 return put_user(inode->i_generation, (int __user *)arg);
1585
1586 case XFS_IOC_FSGETXATTR:
1587 return xfs_ioc_fsgetxattr(ip, 0, arg);
1588 case XFS_IOC_FSGETXATTRA:
1589 return xfs_ioc_fsgetxattr(ip, 1, arg);
1590 case XFS_IOC_FSSETXATTR:
1591 return xfs_ioc_fssetxattr(ip, filp, arg);
1592 case XFS_IOC_GETXFLAGS:
1593 return xfs_ioc_getxflags(ip, arg);
1594 case XFS_IOC_SETXFLAGS:
1595 return xfs_ioc_setxflags(ip, filp, arg);
1596
1597 case XFS_IOC_FSSETDM: {
1598 struct fsdmidata dmi;
1599
1600 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1601 return -EFAULT;
1602
1603 error = mnt_want_write_file(filp);
1604 if (error)
1605 return error;
1606
1607 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1608 dmi.fsd_dmstate);
1609 mnt_drop_write_file(filp);
1610 return error;
1611 }
1612
1613 case XFS_IOC_GETBMAP:
1614 case XFS_IOC_GETBMAPA:
1615 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1616
1617 case XFS_IOC_GETBMAPX:
1618 return xfs_ioc_getbmapx(ip, arg);
1619
1620 case XFS_IOC_FD_TO_HANDLE:
1621 case XFS_IOC_PATH_TO_HANDLE:
1622 case XFS_IOC_PATH_TO_FSHANDLE: {
1623 xfs_fsop_handlereq_t hreq;
1624
1625 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1626 return -EFAULT;
1627 return xfs_find_handle(cmd, &hreq);
1628 }
1629 case XFS_IOC_OPEN_BY_HANDLE: {
1630 xfs_fsop_handlereq_t hreq;
1631
1632 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1633 return -EFAULT;
1634 return xfs_open_by_handle(filp, &hreq);
1635 }
1636 case XFS_IOC_FSSETDM_BY_HANDLE:
1637 return xfs_fssetdm_by_handle(filp, arg);
1638
1639 case XFS_IOC_READLINK_BY_HANDLE: {
1640 xfs_fsop_handlereq_t hreq;
1641
1642 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1643 return -EFAULT;
1644 return xfs_readlink_by_handle(filp, &hreq);
1645 }
1646 case XFS_IOC_ATTRLIST_BY_HANDLE:
1647 return xfs_attrlist_by_handle(filp, arg);
1648
1649 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1650 return xfs_attrmulti_by_handle(filp, arg);
1651
1652 case XFS_IOC_SWAPEXT: {
1653 struct xfs_swapext sxp;
1654
1655 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1656 return -EFAULT;
1657 error = mnt_want_write_file(filp);
1658 if (error)
1659 return error;
1660 error = xfs_ioc_swapext(&sxp);
1661 mnt_drop_write_file(filp);
1662 return error;
1663 }
1664
1665 case XFS_IOC_FSCOUNTS: {
1666 xfs_fsop_counts_t out;
1667
1668 error = xfs_fs_counts(mp, &out);
1669 if (error)
1670 return error;
1671
1672 if (copy_to_user(arg, &out, sizeof(out)))
1673 return -EFAULT;
1674 return 0;
1675 }
1676
1677 case XFS_IOC_SET_RESBLKS: {
1678 xfs_fsop_resblks_t inout;
1679 __uint64_t in;
1680
1681 if (!capable(CAP_SYS_ADMIN))
1682 return -EPERM;
1683
1684 if (mp->m_flags & XFS_MOUNT_RDONLY)
1685 return -EROFS;
1686
1687 if (copy_from_user(&inout, arg, sizeof(inout)))
1688 return -EFAULT;
1689
1690 error = mnt_want_write_file(filp);
1691 if (error)
1692 return error;
1693
1694 /* input parameter is passed in resblks field of structure */
1695 in = inout.resblks;
1696 error = xfs_reserve_blocks(mp, &in, &inout);
1697 mnt_drop_write_file(filp);
1698 if (error)
1699 return error;
1700
1701 if (copy_to_user(arg, &inout, sizeof(inout)))
1702 return -EFAULT;
1703 return 0;
1704 }
1705
1706 case XFS_IOC_GET_RESBLKS: {
1707 xfs_fsop_resblks_t out;
1708
1709 if (!capable(CAP_SYS_ADMIN))
1710 return -EPERM;
1711
1712 error = xfs_reserve_blocks(mp, NULL, &out);
1713 if (error)
1714 return error;
1715
1716 if (copy_to_user(arg, &out, sizeof(out)))
1717 return -EFAULT;
1718
1719 return 0;
1720 }
1721
1722 case XFS_IOC_FSGROWFSDATA: {
1723 xfs_growfs_data_t in;
1724
1725 if (copy_from_user(&in, arg, sizeof(in)))
1726 return -EFAULT;
1727
1728 error = mnt_want_write_file(filp);
1729 if (error)
1730 return error;
1731 error = xfs_growfs_data(mp, &in);
1732 mnt_drop_write_file(filp);
1733 return error;
1734 }
1735
1736 case XFS_IOC_FSGROWFSLOG: {
1737 xfs_growfs_log_t in;
1738
1739 if (copy_from_user(&in, arg, sizeof(in)))
1740 return -EFAULT;
1741
1742 error = mnt_want_write_file(filp);
1743 if (error)
1744 return error;
1745 error = xfs_growfs_log(mp, &in);
1746 mnt_drop_write_file(filp);
1747 return error;
1748 }
1749
1750 case XFS_IOC_FSGROWFSRT: {
1751 xfs_growfs_rt_t in;
1752
1753 if (copy_from_user(&in, arg, sizeof(in)))
1754 return -EFAULT;
1755
1756 error = mnt_want_write_file(filp);
1757 if (error)
1758 return error;
1759 error = xfs_growfs_rt(mp, &in);
1760 mnt_drop_write_file(filp);
1761 return error;
1762 }
1763
1764 case XFS_IOC_GOINGDOWN: {
1765 __uint32_t in;
1766
1767 if (!capable(CAP_SYS_ADMIN))
1768 return -EPERM;
1769
1770 if (get_user(in, (__uint32_t __user *)arg))
1771 return -EFAULT;
1772
1773 return xfs_fs_goingdown(mp, in);
1774 }
1775
1776 case XFS_IOC_ERROR_INJECTION: {
1777 xfs_error_injection_t in;
1778
1779 if (!capable(CAP_SYS_ADMIN))
1780 return -EPERM;
1781
1782 if (copy_from_user(&in, arg, sizeof(in)))
1783 return -EFAULT;
1784
1785 return xfs_errortag_add(in.errtag, mp);
1786 }
1787
1788 case XFS_IOC_ERROR_CLEARALL:
1789 if (!capable(CAP_SYS_ADMIN))
1790 return -EPERM;
1791
1792 return xfs_errortag_clearall(mp, 1);
1793
1794 case XFS_IOC_FREE_EOFBLOCKS: {
1795 struct xfs_fs_eofblocks eofb;
1796 struct xfs_eofblocks keofb;
1797
1798 if (!capable(CAP_SYS_ADMIN))
1799 return -EPERM;
1800
1801 if (mp->m_flags & XFS_MOUNT_RDONLY)
1802 return -EROFS;
1803
1804 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1805 return -EFAULT;
1806
1807 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1808 if (error)
1809 return error;
1810
1811 return xfs_icache_free_eofblocks(mp, &keofb);
1812 }
1813
1814 default:
1815 return -ENOTTY;
1816 }
1817 }
Linux with added FPC-III support