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Linux 3.17-rc2
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blob3799695b92495a02e7a15722fbe77b842b77efa2
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_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_mount.h"
27 #include "xfs_inode.h"
28 #include "xfs_ioctl.h"
29 #include "xfs_alloc.h"
30 #include "xfs_rtalloc.h"
31 #include "xfs_itable.h"
32 #include "xfs_error.h"
33 #include "xfs_attr.h"
34 #include "xfs_bmap.h"
35 #include "xfs_bmap_util.h"
36 #include "xfs_fsops.h"
37 #include "xfs_discard.h"
38 #include "xfs_quota.h"
39 #include "xfs_export.h"
40 #include "xfs_trace.h"
41 #include "xfs_icache.h"
42 #include "xfs_symlink.h"
43 #include "xfs_dinode.h"
44 #include "xfs_trans.h"
45
46 #include <linux/capability.h>
47 #include <linux/dcache.h>
48 #include <linux/mount.h>
49 #include <linux/namei.h>
50 #include <linux/pagemap.h>
51 #include <linux/slab.h>
52 #include <linux/exportfs.h>
53
54 /*
55 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
56 * a file or fs handle.
57 *
58 * XFS_IOC_PATH_TO_FSHANDLE
59 * returns fs handle for a mount point or path within that mount point
60 * XFS_IOC_FD_TO_HANDLE
61 * returns full handle for a FD opened in user space
62 * XFS_IOC_PATH_TO_HANDLE
63 * returns full handle for a path
64 */
65 int
66 xfs_find_handle(
67 unsigned int cmd,
68 xfs_fsop_handlereq_t *hreq)
69 {
70 int hsize;
71 xfs_handle_t handle;
72 struct inode *inode;
73 struct fd f = {NULL};
74 struct path path;
75 int error;
76 struct xfs_inode *ip;
77
78 if (cmd == XFS_IOC_FD_TO_HANDLE) {
79 f = fdget(hreq->fd);
80 if (!f.file)
81 return -EBADF;
82 inode = file_inode(f.file);
83 } else {
84 error = user_lpath((const char __user *)hreq->path, &path);
85 if (error)
86 return error;
87 inode = path.dentry->d_inode;
88 }
89 ip = XFS_I(inode);
90
91 /*
92 * We can only generate handles for inodes residing on a XFS filesystem,
93 * and only for regular files, directories or symbolic links.
94 */
95 error = -EINVAL;
96 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
97 goto out_put;
98
99 error = -EBADF;
100 if (!S_ISREG(inode->i_mode) &&
101 !S_ISDIR(inode->i_mode) &&
102 !S_ISLNK(inode->i_mode))
103 goto out_put;
104
105
106 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
107
108 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
109 /*
110 * This handle only contains an fsid, zero the rest.
111 */
112 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
113 hsize = sizeof(xfs_fsid_t);
114 } else {
115 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
116 sizeof(handle.ha_fid.fid_len);
117 handle.ha_fid.fid_pad = 0;
118 handle.ha_fid.fid_gen = ip->i_d.di_gen;
119 handle.ha_fid.fid_ino = ip->i_ino;
120
121 hsize = XFS_HSIZE(handle);
122 }
123
124 error = -EFAULT;
125 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
126 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
127 goto out_put;
128
129 error = 0;
130
131 out_put:
132 if (cmd == XFS_IOC_FD_TO_HANDLE)
133 fdput(f);
134 else
135 path_put(&path);
136 return error;
137 }
138
139 /*
140 * No need to do permission checks on the various pathname components
141 * as the handle operations are privileged.
142 */
143 STATIC int
144 xfs_handle_acceptable(
145 void *context,
146 struct dentry *dentry)
147 {
148 return 1;
149 }
150
151 /*
152 * Convert userspace handle data into a dentry.
153 */
154 struct dentry *
155 xfs_handle_to_dentry(
156 struct file *parfilp,
157 void __user *uhandle,
158 u32 hlen)
159 {
160 xfs_handle_t handle;
161 struct xfs_fid64 fid;
162
163 /*
164 * Only allow handle opens under a directory.
165 */
166 if (!S_ISDIR(file_inode(parfilp)->i_mode))
167 return ERR_PTR(-ENOTDIR);
168
169 if (hlen != sizeof(xfs_handle_t))
170 return ERR_PTR(-EINVAL);
171 if (copy_from_user(&handle, uhandle, hlen))
172 return ERR_PTR(-EFAULT);
173 if (handle.ha_fid.fid_len !=
174 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
175 return ERR_PTR(-EINVAL);
176
177 memset(&fid, 0, sizeof(struct fid));
178 fid.ino = handle.ha_fid.fid_ino;
179 fid.gen = handle.ha_fid.fid_gen;
180
181 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
182 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
183 xfs_handle_acceptable, NULL);
184 }
185
186 STATIC struct dentry *
187 xfs_handlereq_to_dentry(
188 struct file *parfilp,
189 xfs_fsop_handlereq_t *hreq)
190 {
191 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
192 }
193
194 int
195 xfs_open_by_handle(
196 struct file *parfilp,
197 xfs_fsop_handlereq_t *hreq)
198 {
199 const struct cred *cred = current_cred();
200 int error;
201 int fd;
202 int permflag;
203 struct file *filp;
204 struct inode *inode;
205 struct dentry *dentry;
206 fmode_t fmode;
207 struct path path;
208
209 if (!capable(CAP_SYS_ADMIN))
210 return -EPERM;
211
212 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
213 if (IS_ERR(dentry))
214 return PTR_ERR(dentry);
215 inode = dentry->d_inode;
216
217 /* Restrict xfs_open_by_handle to directories & regular files. */
218 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
219 error = -EPERM;
220 goto out_dput;
221 }
222
223 #if BITS_PER_LONG != 32
224 hreq->oflags |= O_LARGEFILE;
225 #endif
226
227 permflag = hreq->oflags;
228 fmode = OPEN_FMODE(permflag);
229 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
230 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
231 error = -EPERM;
232 goto out_dput;
233 }
234
235 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
236 error = -EACCES;
237 goto out_dput;
238 }
239
240 /* Can't write directories. */
241 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
242 error = -EISDIR;
243 goto out_dput;
244 }
245
246 fd = get_unused_fd_flags(0);
247 if (fd < 0) {
248 error = fd;
249 goto out_dput;
250 }
251
252 path.mnt = parfilp->f_path.mnt;
253 path.dentry = dentry;
254 filp = dentry_open(&path, hreq->oflags, cred);
255 dput(dentry);
256 if (IS_ERR(filp)) {
257 put_unused_fd(fd);
258 return PTR_ERR(filp);
259 }
260
261 if (S_ISREG(inode->i_mode)) {
262 filp->f_flags |= O_NOATIME;
263 filp->f_mode |= FMODE_NOCMTIME;
264 }
265
266 fd_install(fd, filp);
267 return fd;
268
269 out_dput:
270 dput(dentry);
271 return error;
272 }
273
274 int
275 xfs_readlink_by_handle(
276 struct file *parfilp,
277 xfs_fsop_handlereq_t *hreq)
278 {
279 struct dentry *dentry;
280 __u32 olen;
281 void *link;
282 int error;
283
284 if (!capable(CAP_SYS_ADMIN))
285 return -EPERM;
286
287 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
288 if (IS_ERR(dentry))
289 return PTR_ERR(dentry);
290
291 /* Restrict this handle operation to symlinks only. */
292 if (!S_ISLNK(dentry->d_inode->i_mode)) {
293 error = -EINVAL;
294 goto out_dput;
295 }
296
297 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
298 error = -EFAULT;
299 goto out_dput;
300 }
301
302 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
303 if (!link) {
304 error = -ENOMEM;
305 goto out_dput;
306 }
307
308 error = xfs_readlink(XFS_I(dentry->d_inode), link);
309 if (error)
310 goto out_kfree;
311 error = readlink_copy(hreq->ohandle, olen, link);
312 if (error)
313 goto out_kfree;
314
315 out_kfree:
316 kfree(link);
317 out_dput:
318 dput(dentry);
319 return error;
320 }
321
322 int
323 xfs_set_dmattrs(
324 xfs_inode_t *ip,
325 u_int evmask,
326 u_int16_t state)
327 {
328 xfs_mount_t *mp = ip->i_mount;
329 xfs_trans_t *tp;
330 int error;
331
332 if (!capable(CAP_SYS_ADMIN))
333 return -EPERM;
334
335 if (XFS_FORCED_SHUTDOWN(mp))
336 return -EIO;
337
338 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
339 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
340 if (error) {
341 xfs_trans_cancel(tp, 0);
342 return error;
343 }
344 xfs_ilock(ip, XFS_ILOCK_EXCL);
345 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
346
347 ip->i_d.di_dmevmask = evmask;
348 ip->i_d.di_dmstate = state;
349
350 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
351 error = xfs_trans_commit(tp, 0);
352
353 return error;
354 }
355
356 STATIC int
357 xfs_fssetdm_by_handle(
358 struct file *parfilp,
359 void __user *arg)
360 {
361 int error;
362 struct fsdmidata fsd;
363 xfs_fsop_setdm_handlereq_t dmhreq;
364 struct dentry *dentry;
365
366 if (!capable(CAP_MKNOD))
367 return -EPERM;
368 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
369 return -EFAULT;
370
371 error = mnt_want_write_file(parfilp);
372 if (error)
373 return error;
374
375 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
376 if (IS_ERR(dentry)) {
377 mnt_drop_write_file(parfilp);
378 return PTR_ERR(dentry);
379 }
380
381 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
382 error = -EPERM;
383 goto out;
384 }
385
386 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
387 error = -EFAULT;
388 goto out;
389 }
390
391 error = xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
392 fsd.fsd_dmstate);
393
394 out:
395 mnt_drop_write_file(parfilp);
396 dput(dentry);
397 return error;
398 }
399
400 STATIC int
401 xfs_attrlist_by_handle(
402 struct file *parfilp,
403 void __user *arg)
404 {
405 int error = -ENOMEM;
406 attrlist_cursor_kern_t *cursor;
407 xfs_fsop_attrlist_handlereq_t al_hreq;
408 struct dentry *dentry;
409 char *kbuf;
410
411 if (!capable(CAP_SYS_ADMIN))
412 return -EPERM;
413 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
414 return -EFAULT;
415 if (al_hreq.buflen < sizeof(struct attrlist) ||
416 al_hreq.buflen > XATTR_LIST_MAX)
417 return -EINVAL;
418
419 /*
420 * Reject flags, only allow namespaces.
421 */
422 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
423 return -EINVAL;
424
425 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
426 if (IS_ERR(dentry))
427 return PTR_ERR(dentry);
428
429 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
430 if (!kbuf)
431 goto out_dput;
432
433 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
434 error = xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
435 al_hreq.flags, cursor);
436 if (error)
437 goto out_kfree;
438
439 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
440 error = -EFAULT;
441
442 out_kfree:
443 kmem_free(kbuf);
444 out_dput:
445 dput(dentry);
446 return error;
447 }
448
449 int
450 xfs_attrmulti_attr_get(
451 struct inode *inode,
452 unsigned char *name,
453 unsigned char __user *ubuf,
454 __uint32_t *len,
455 __uint32_t flags)
456 {
457 unsigned char *kbuf;
458 int error = -EFAULT;
459
460 if (*len > XATTR_SIZE_MAX)
461 return -EINVAL;
462 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
463 if (!kbuf)
464 return -ENOMEM;
465
466 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
467 if (error)
468 goto out_kfree;
469
470 if (copy_to_user(ubuf, kbuf, *len))
471 error = -EFAULT;
472
473 out_kfree:
474 kmem_free(kbuf);
475 return error;
476 }
477
478 int
479 xfs_attrmulti_attr_set(
480 struct inode *inode,
481 unsigned char *name,
482 const unsigned char __user *ubuf,
483 __uint32_t len,
484 __uint32_t flags)
485 {
486 unsigned char *kbuf;
487
488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
489 return -EPERM;
490 if (len > 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 return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
498 }
499
500 int
501 xfs_attrmulti_attr_remove(
502 struct inode *inode,
503 unsigned char *name,
504 __uint32_t flags)
505 {
506 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
507 return -EPERM;
508 return xfs_attr_remove(XFS_I(inode), name, flags);
509 }
510
511 STATIC int
512 xfs_attrmulti_by_handle(
513 struct file *parfilp,
514 void __user *arg)
515 {
516 int error;
517 xfs_attr_multiop_t *ops;
518 xfs_fsop_attrmulti_handlereq_t am_hreq;
519 struct dentry *dentry;
520 unsigned int i, size;
521 unsigned char *attr_name;
522
523 if (!capable(CAP_SYS_ADMIN))
524 return -EPERM;
525 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
526 return -EFAULT;
527
528 /* overflow check */
529 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
530 return -E2BIG;
531
532 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
533 if (IS_ERR(dentry))
534 return PTR_ERR(dentry);
535
536 error = -E2BIG;
537 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
538 if (!size || size > 16 * PAGE_SIZE)
539 goto out_dput;
540
541 ops = memdup_user(am_hreq.ops, size);
542 if (IS_ERR(ops)) {
543 error = PTR_ERR(ops);
544 goto out_dput;
545 }
546
547 error = -ENOMEM;
548 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
549 if (!attr_name)
550 goto out_kfree_ops;
551
552 error = 0;
553 for (i = 0; i < am_hreq.opcount; i++) {
554 ops[i].am_error = strncpy_from_user((char *)attr_name,
555 ops[i].am_attrname, MAXNAMELEN);
556 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
557 error = -ERANGE;
558 if (ops[i].am_error < 0)
559 break;
560
561 switch (ops[i].am_opcode) {
562 case ATTR_OP_GET:
563 ops[i].am_error = xfs_attrmulti_attr_get(
564 dentry->d_inode, attr_name,
565 ops[i].am_attrvalue, &ops[i].am_length,
566 ops[i].am_flags);
567 break;
568 case ATTR_OP_SET:
569 ops[i].am_error = mnt_want_write_file(parfilp);
570 if (ops[i].am_error)
571 break;
572 ops[i].am_error = xfs_attrmulti_attr_set(
573 dentry->d_inode, attr_name,
574 ops[i].am_attrvalue, ops[i].am_length,
575 ops[i].am_flags);
576 mnt_drop_write_file(parfilp);
577 break;
578 case ATTR_OP_REMOVE:
579 ops[i].am_error = mnt_want_write_file(parfilp);
580 if (ops[i].am_error)
581 break;
582 ops[i].am_error = xfs_attrmulti_attr_remove(
583 dentry->d_inode, attr_name,
584 ops[i].am_flags);
585 mnt_drop_write_file(parfilp);
586 break;
587 default:
588 ops[i].am_error = -EINVAL;
589 }
590 }
591
592 if (copy_to_user(am_hreq.ops, ops, size))
593 error = -EFAULT;
594
595 kfree(attr_name);
596 out_kfree_ops:
597 kfree(ops);
598 out_dput:
599 dput(dentry);
600 return error;
601 }
602
603 int
604 xfs_ioc_space(
605 struct xfs_inode *ip,
606 struct inode *inode,
607 struct file *filp,
608 int ioflags,
609 unsigned int cmd,
610 xfs_flock64_t *bf)
611 {
612 struct xfs_mount *mp = ip->i_mount;
613 struct xfs_trans *tp;
614 struct iattr iattr;
615 bool setprealloc = false;
616 bool clrprealloc = false;
617 int error;
618
619 /*
620 * Only allow the sys admin to reserve space unless
621 * unwritten extents are enabled.
622 */
623 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
624 !capable(CAP_SYS_ADMIN))
625 return -EPERM;
626
627 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
628 return -EPERM;
629
630 if (!(filp->f_mode & FMODE_WRITE))
631 return -EBADF;
632
633 if (!S_ISREG(inode->i_mode))
634 return -EINVAL;
635
636 error = mnt_want_write_file(filp);
637 if (error)
638 return error;
639
640 xfs_ilock(ip, XFS_IOLOCK_EXCL);
641
642 switch (bf->l_whence) {
643 case 0: /*SEEK_SET*/
644 break;
645 case 1: /*SEEK_CUR*/
646 bf->l_start += filp->f_pos;
647 break;
648 case 2: /*SEEK_END*/
649 bf->l_start += XFS_ISIZE(ip);
650 break;
651 default:
652 error = -EINVAL;
653 goto out_unlock;
654 }
655
656 /*
657 * length of <= 0 for resv/unresv/zero is invalid. length for
658 * alloc/free is ignored completely and we have no idea what userspace
659 * might have set it to, so set it to zero to allow range
660 * checks to pass.
661 */
662 switch (cmd) {
663 case XFS_IOC_ZERO_RANGE:
664 case XFS_IOC_RESVSP:
665 case XFS_IOC_RESVSP64:
666 case XFS_IOC_UNRESVSP:
667 case XFS_IOC_UNRESVSP64:
668 if (bf->l_len <= 0) {
669 error = -EINVAL;
670 goto out_unlock;
671 }
672 break;
673 default:
674 bf->l_len = 0;
675 break;
676 }
677
678 if (bf->l_start < 0 ||
679 bf->l_start > mp->m_super->s_maxbytes ||
680 bf->l_start + bf->l_len < 0 ||
681 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
682 error = -EINVAL;
683 goto out_unlock;
684 }
685
686 switch (cmd) {
687 case XFS_IOC_ZERO_RANGE:
688 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
689 if (!error)
690 setprealloc = true;
691 break;
692 case XFS_IOC_RESVSP:
693 case XFS_IOC_RESVSP64:
694 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
695 XFS_BMAPI_PREALLOC);
696 if (!error)
697 setprealloc = true;
698 break;
699 case XFS_IOC_UNRESVSP:
700 case XFS_IOC_UNRESVSP64:
701 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
702 break;
703 case XFS_IOC_ALLOCSP:
704 case XFS_IOC_ALLOCSP64:
705 case XFS_IOC_FREESP:
706 case XFS_IOC_FREESP64:
707 if (bf->l_start > XFS_ISIZE(ip)) {
708 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
709 bf->l_start - XFS_ISIZE(ip), 0);
710 if (error)
711 goto out_unlock;
712 }
713
714 iattr.ia_valid = ATTR_SIZE;
715 iattr.ia_size = bf->l_start;
716
717 error = xfs_setattr_size(ip, &iattr);
718 if (!error)
719 clrprealloc = true;
720 break;
721 default:
722 ASSERT(0);
723 error = -EINVAL;
724 }
725
726 if (error)
727 goto out_unlock;
728
729 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
730 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
731 if (error) {
732 xfs_trans_cancel(tp, 0);
733 goto out_unlock;
734 }
735
736 xfs_ilock(ip, XFS_ILOCK_EXCL);
737 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
738
739 if (!(ioflags & XFS_IO_INVIS)) {
740 ip->i_d.di_mode &= ~S_ISUID;
741 if (ip->i_d.di_mode & S_IXGRP)
742 ip->i_d.di_mode &= ~S_ISGID;
743 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
744 }
745
746 if (setprealloc)
747 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
748 else if (clrprealloc)
749 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
750
751 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
752 if (filp->f_flags & O_DSYNC)
753 xfs_trans_set_sync(tp);
754 error = xfs_trans_commit(tp, 0);
755
756 out_unlock:
757 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
758 mnt_drop_write_file(filp);
759 return error;
760 }
761
762 STATIC int
763 xfs_ioc_bulkstat(
764 xfs_mount_t *mp,
765 unsigned int cmd,
766 void __user *arg)
767 {
768 xfs_fsop_bulkreq_t bulkreq;
769 int count; /* # of records returned */
770 xfs_ino_t inlast; /* last inode number */
771 int done;
772 int error;
773
774 /* done = 1 if there are more stats to get and if bulkstat */
775 /* should be called again (unused here, but used in dmapi) */
776
777 if (!capable(CAP_SYS_ADMIN))
778 return -EPERM;
779
780 if (XFS_FORCED_SHUTDOWN(mp))
781 return -EIO;
782
783 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
784 return -EFAULT;
785
786 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
787 return -EFAULT;
788
789 if ((count = bulkreq.icount) <= 0)
790 return -EINVAL;
791
792 if (bulkreq.ubuffer == NULL)
793 return -EINVAL;
794
795 if (cmd == XFS_IOC_FSINUMBERS)
796 error = xfs_inumbers(mp, &inlast, &count,
797 bulkreq.ubuffer, xfs_inumbers_fmt);
798 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
799 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
800 sizeof(xfs_bstat_t), NULL, &done);
801 else /* XFS_IOC_FSBULKSTAT */
802 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
803 sizeof(xfs_bstat_t), bulkreq.ubuffer,
804 &done);
805
806 if (error)
807 return error;
808
809 if (bulkreq.ocount != NULL) {
810 if (copy_to_user(bulkreq.lastip, &inlast,
811 sizeof(xfs_ino_t)))
812 return -EFAULT;
813
814 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
815 return -EFAULT;
816 }
817
818 return 0;
819 }
820
821 STATIC int
822 xfs_ioc_fsgeometry_v1(
823 xfs_mount_t *mp,
824 void __user *arg)
825 {
826 xfs_fsop_geom_t fsgeo;
827 int error;
828
829 error = xfs_fs_geometry(mp, &fsgeo, 3);
830 if (error)
831 return error;
832
833 /*
834 * Caller should have passed an argument of type
835 * xfs_fsop_geom_v1_t. This is a proper subset of the
836 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
837 */
838 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
839 return -EFAULT;
840 return 0;
841 }
842
843 STATIC int
844 xfs_ioc_fsgeometry(
845 xfs_mount_t *mp,
846 void __user *arg)
847 {
848 xfs_fsop_geom_t fsgeo;
849 int error;
850
851 error = xfs_fs_geometry(mp, &fsgeo, 4);
852 if (error)
853 return error;
854
855 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
856 return -EFAULT;
857 return 0;
858 }
859
860 /*
861 * Linux extended inode flags interface.
862 */
863
864 STATIC unsigned int
865 xfs_merge_ioc_xflags(
866 unsigned int flags,
867 unsigned int start)
868 {
869 unsigned int xflags = start;
870
871 if (flags & FS_IMMUTABLE_FL)
872 xflags |= XFS_XFLAG_IMMUTABLE;
873 else
874 xflags &= ~XFS_XFLAG_IMMUTABLE;
875 if (flags & FS_APPEND_FL)
876 xflags |= XFS_XFLAG_APPEND;
877 else
878 xflags &= ~XFS_XFLAG_APPEND;
879 if (flags & FS_SYNC_FL)
880 xflags |= XFS_XFLAG_SYNC;
881 else
882 xflags &= ~XFS_XFLAG_SYNC;
883 if (flags & FS_NOATIME_FL)
884 xflags |= XFS_XFLAG_NOATIME;
885 else
886 xflags &= ~XFS_XFLAG_NOATIME;
887 if (flags & FS_NODUMP_FL)
888 xflags |= XFS_XFLAG_NODUMP;
889 else
890 xflags &= ~XFS_XFLAG_NODUMP;
891
892 return xflags;
893 }
894
895 STATIC unsigned int
896 xfs_di2lxflags(
897 __uint16_t di_flags)
898 {
899 unsigned int flags = 0;
900
901 if (di_flags & XFS_DIFLAG_IMMUTABLE)
902 flags |= FS_IMMUTABLE_FL;
903 if (di_flags & XFS_DIFLAG_APPEND)
904 flags |= FS_APPEND_FL;
905 if (di_flags & XFS_DIFLAG_SYNC)
906 flags |= FS_SYNC_FL;
907 if (di_flags & XFS_DIFLAG_NOATIME)
908 flags |= FS_NOATIME_FL;
909 if (di_flags & XFS_DIFLAG_NODUMP)
910 flags |= FS_NODUMP_FL;
911 return flags;
912 }
913
914 STATIC int
915 xfs_ioc_fsgetxattr(
916 xfs_inode_t *ip,
917 int attr,
918 void __user *arg)
919 {
920 struct fsxattr fa;
921
922 memset(&fa, 0, sizeof(struct fsxattr));
923
924 xfs_ilock(ip, XFS_ILOCK_SHARED);
925 fa.fsx_xflags = xfs_ip2xflags(ip);
926 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
927 fa.fsx_projid = xfs_get_projid(ip);
928
929 if (attr) {
930 if (ip->i_afp) {
931 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
932 fa.fsx_nextents = ip->i_afp->if_bytes /
933 sizeof(xfs_bmbt_rec_t);
934 else
935 fa.fsx_nextents = ip->i_d.di_anextents;
936 } else
937 fa.fsx_nextents = 0;
938 } else {
939 if (ip->i_df.if_flags & XFS_IFEXTENTS)
940 fa.fsx_nextents = ip->i_df.if_bytes /
941 sizeof(xfs_bmbt_rec_t);
942 else
943 fa.fsx_nextents = ip->i_d.di_nextents;
944 }
945 xfs_iunlock(ip, XFS_ILOCK_SHARED);
946
947 if (copy_to_user(arg, &fa, sizeof(fa)))
948 return -EFAULT;
949 return 0;
950 }
951
952 STATIC void
953 xfs_set_diflags(
954 struct xfs_inode *ip,
955 unsigned int xflags)
956 {
957 unsigned int di_flags;
958
959 /* can't set PREALLOC this way, just preserve it */
960 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
961 if (xflags & XFS_XFLAG_IMMUTABLE)
962 di_flags |= XFS_DIFLAG_IMMUTABLE;
963 if (xflags & XFS_XFLAG_APPEND)
964 di_flags |= XFS_DIFLAG_APPEND;
965 if (xflags & XFS_XFLAG_SYNC)
966 di_flags |= XFS_DIFLAG_SYNC;
967 if (xflags & XFS_XFLAG_NOATIME)
968 di_flags |= XFS_DIFLAG_NOATIME;
969 if (xflags & XFS_XFLAG_NODUMP)
970 di_flags |= XFS_DIFLAG_NODUMP;
971 if (xflags & XFS_XFLAG_PROJINHERIT)
972 di_flags |= XFS_DIFLAG_PROJINHERIT;
973 if (xflags & XFS_XFLAG_NODEFRAG)
974 di_flags |= XFS_DIFLAG_NODEFRAG;
975 if (xflags & XFS_XFLAG_FILESTREAM)
976 di_flags |= XFS_DIFLAG_FILESTREAM;
977 if (S_ISDIR(ip->i_d.di_mode)) {
978 if (xflags & XFS_XFLAG_RTINHERIT)
979 di_flags |= XFS_DIFLAG_RTINHERIT;
980 if (xflags & XFS_XFLAG_NOSYMLINKS)
981 di_flags |= XFS_DIFLAG_NOSYMLINKS;
982 if (xflags & XFS_XFLAG_EXTSZINHERIT)
983 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
984 } else if (S_ISREG(ip->i_d.di_mode)) {
985 if (xflags & XFS_XFLAG_REALTIME)
986 di_flags |= XFS_DIFLAG_REALTIME;
987 if (xflags & XFS_XFLAG_EXTSIZE)
988 di_flags |= XFS_DIFLAG_EXTSIZE;
989 }
990
991 ip->i_d.di_flags = di_flags;
992 }
993
994 STATIC void
995 xfs_diflags_to_linux(
996 struct xfs_inode *ip)
997 {
998 struct inode *inode = VFS_I(ip);
999 unsigned int xflags = xfs_ip2xflags(ip);
1000
1001 if (xflags & XFS_XFLAG_IMMUTABLE)
1002 inode->i_flags |= S_IMMUTABLE;
1003 else
1004 inode->i_flags &= ~S_IMMUTABLE;
1005 if (xflags & XFS_XFLAG_APPEND)
1006 inode->i_flags |= S_APPEND;
1007 else
1008 inode->i_flags &= ~S_APPEND;
1009 if (xflags & XFS_XFLAG_SYNC)
1010 inode->i_flags |= S_SYNC;
1011 else
1012 inode->i_flags &= ~S_SYNC;
1013 if (xflags & XFS_XFLAG_NOATIME)
1014 inode->i_flags |= S_NOATIME;
1015 else
1016 inode->i_flags &= ~S_NOATIME;
1017 }
1018
1019 #define FSX_PROJID 1
1020 #define FSX_EXTSIZE 2
1021 #define FSX_XFLAGS 4
1022 #define FSX_NONBLOCK 8
1023
1024 STATIC int
1025 xfs_ioctl_setattr(
1026 xfs_inode_t *ip,
1027 struct fsxattr *fa,
1028 int mask)
1029 {
1030 struct xfs_mount *mp = ip->i_mount;
1031 struct xfs_trans *tp;
1032 unsigned int lock_flags = 0;
1033 struct xfs_dquot *udqp = NULL;
1034 struct xfs_dquot *pdqp = NULL;
1035 struct xfs_dquot *olddquot = NULL;
1036 int code;
1037
1038 trace_xfs_ioctl_setattr(ip);
1039
1040 if (mp->m_flags & XFS_MOUNT_RDONLY)
1041 return -EROFS;
1042 if (XFS_FORCED_SHUTDOWN(mp))
1043 return -EIO;
1044
1045 /*
1046 * Disallow 32bit project ids when projid32bit feature is not enabled.
1047 */
1048 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
1049 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1050 return -EINVAL;
1051
1052 /*
1053 * If disk quotas is on, we make sure that the dquots do exist on disk,
1054 * before we start any other transactions. Trying to do this later
1055 * is messy. We don't care to take a readlock to look at the ids
1056 * in inode here, because we can't hold it across the trans_reserve.
1057 * If the IDs do change before we take the ilock, we're covered
1058 * because the i_*dquot fields will get updated anyway.
1059 */
1060 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
1061 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1062 ip->i_d.di_gid, fa->fsx_projid,
1063 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1064 if (code)
1065 return code;
1066 }
1067
1068 /*
1069 * For the other attributes, we acquire the inode lock and
1070 * first do an error checking pass.
1071 */
1072 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1073 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1074 if (code)
1075 goto error_return;
1076
1077 lock_flags = XFS_ILOCK_EXCL;
1078 xfs_ilock(ip, lock_flags);
1079
1080 /*
1081 * CAP_FOWNER overrides the following restrictions:
1082 *
1083 * The user ID of the calling process must be equal
1084 * to the file owner ID, except in cases where the
1085 * CAP_FSETID capability is applicable.
1086 */
1087 if (!inode_owner_or_capable(VFS_I(ip))) {
1088 code = -EPERM;
1089 goto error_return;
1090 }
1091
1092 /*
1093 * Do a quota reservation only if projid is actually going to change.
1094 * Only allow changing of projid from init_user_ns since it is a
1095 * non user namespace aware identifier.
1096 */
1097 if (mask & FSX_PROJID) {
1098 if (current_user_ns() != &init_user_ns) {
1099 code = -EINVAL;
1100 goto error_return;
1101 }
1102
1103 if (XFS_IS_QUOTA_RUNNING(mp) &&
1104 XFS_IS_PQUOTA_ON(mp) &&
1105 xfs_get_projid(ip) != fa->fsx_projid) {
1106 ASSERT(tp);
1107 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1108 pdqp, capable(CAP_FOWNER) ?
1109 XFS_QMOPT_FORCE_RES : 0);
1110 if (code) /* out of quota */
1111 goto error_return;
1112 }
1113 }
1114
1115 if (mask & FSX_EXTSIZE) {
1116 /*
1117 * Can't change extent size if any extents are allocated.
1118 */
1119 if (ip->i_d.di_nextents &&
1120 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1121 fa->fsx_extsize)) {
1122 code = -EINVAL; /* EFBIG? */
1123 goto error_return;
1124 }
1125
1126 /*
1127 * Extent size must be a multiple of the appropriate block
1128 * size, if set at all. It must also be smaller than the
1129 * maximum extent size supported by the filesystem.
1130 *
1131 * Also, for non-realtime files, limit the extent size hint to
1132 * half the size of the AGs in the filesystem so alignment
1133 * doesn't result in extents larger than an AG.
1134 */
1135 if (fa->fsx_extsize != 0) {
1136 xfs_extlen_t size;
1137 xfs_fsblock_t extsize_fsb;
1138
1139 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1140 if (extsize_fsb > MAXEXTLEN) {
1141 code = -EINVAL;
1142 goto error_return;
1143 }
1144
1145 if (XFS_IS_REALTIME_INODE(ip) ||
1146 ((mask & FSX_XFLAGS) &&
1147 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1148 size = mp->m_sb.sb_rextsize <<
1149 mp->m_sb.sb_blocklog;
1150 } else {
1151 size = mp->m_sb.sb_blocksize;
1152 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1153 code = -EINVAL;
1154 goto error_return;
1155 }
1156 }
1157
1158 if (fa->fsx_extsize % size) {
1159 code = -EINVAL;
1160 goto error_return;
1161 }
1162 }
1163 }
1164
1165
1166 if (mask & FSX_XFLAGS) {
1167 /*
1168 * Can't change realtime flag if any extents are allocated.
1169 */
1170 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1171 (XFS_IS_REALTIME_INODE(ip)) !=
1172 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1173 code = -EINVAL; /* EFBIG? */
1174 goto error_return;
1175 }
1176
1177 /*
1178 * If realtime flag is set then must have realtime data.
1179 */
1180 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1181 if ((mp->m_sb.sb_rblocks == 0) ||
1182 (mp->m_sb.sb_rextsize == 0) ||
1183 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1184 code = -EINVAL;
1185 goto error_return;
1186 }
1187 }
1188
1189 /*
1190 * Can't modify an immutable/append-only file unless
1191 * we have appropriate permission.
1192 */
1193 if ((ip->i_d.di_flags &
1194 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1195 (fa->fsx_xflags &
1196 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1197 !capable(CAP_LINUX_IMMUTABLE)) {
1198 code = -EPERM;
1199 goto error_return;
1200 }
1201 }
1202
1203 xfs_trans_ijoin(tp, ip, 0);
1204
1205 /*
1206 * Change file ownership. Must be the owner or privileged.
1207 */
1208 if (mask & FSX_PROJID) {
1209 /*
1210 * CAP_FSETID overrides the following restrictions:
1211 *
1212 * The set-user-ID and set-group-ID bits of a file will be
1213 * cleared upon successful return from chown()
1214 */
1215 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1216 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1217 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1218
1219 /*
1220 * Change the ownerships and register quota modifications
1221 * in the transaction.
1222 */
1223 if (xfs_get_projid(ip) != fa->fsx_projid) {
1224 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1225 olddquot = xfs_qm_vop_chown(tp, ip,
1226 &ip->i_pdquot, pdqp);
1227 }
1228 ASSERT(ip->i_d.di_version > 1);
1229 xfs_set_projid(ip, fa->fsx_projid);
1230 }
1231
1232 }
1233
1234 if (mask & FSX_EXTSIZE)
1235 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1236 if (mask & FSX_XFLAGS) {
1237 xfs_set_diflags(ip, fa->fsx_xflags);
1238 xfs_diflags_to_linux(ip);
1239 }
1240
1241 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1242 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1243
1244 XFS_STATS_INC(xs_ig_attrchg);
1245
1246 /*
1247 * If this is a synchronous mount, make sure that the
1248 * transaction goes to disk before returning to the user.
1249 * This is slightly sub-optimal in that truncates require
1250 * two sync transactions instead of one for wsync filesystems.
1251 * One for the truncate and one for the timestamps since we
1252 * don't want to change the timestamps unless we're sure the
1253 * truncate worked. Truncates are less than 1% of the laddis
1254 * mix so this probably isn't worth the trouble to optimize.
1255 */
1256 if (mp->m_flags & XFS_MOUNT_WSYNC)
1257 xfs_trans_set_sync(tp);
1258 code = xfs_trans_commit(tp, 0);
1259 xfs_iunlock(ip, lock_flags);
1260
1261 /*
1262 * Release any dquot(s) the inode had kept before chown.
1263 */
1264 xfs_qm_dqrele(olddquot);
1265 xfs_qm_dqrele(udqp);
1266 xfs_qm_dqrele(pdqp);
1267
1268 return code;
1269
1270 error_return:
1271 xfs_qm_dqrele(udqp);
1272 xfs_qm_dqrele(pdqp);
1273 xfs_trans_cancel(tp, 0);
1274 if (lock_flags)
1275 xfs_iunlock(ip, lock_flags);
1276 return code;
1277 }
1278
1279 STATIC int
1280 xfs_ioc_fssetxattr(
1281 xfs_inode_t *ip,
1282 struct file *filp,
1283 void __user *arg)
1284 {
1285 struct fsxattr fa;
1286 unsigned int mask;
1287 int error;
1288
1289 if (copy_from_user(&fa, arg, sizeof(fa)))
1290 return -EFAULT;
1291
1292 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1293 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1294 mask |= FSX_NONBLOCK;
1295
1296 error = mnt_want_write_file(filp);
1297 if (error)
1298 return error;
1299 error = xfs_ioctl_setattr(ip, &fa, mask);
1300 mnt_drop_write_file(filp);
1301 return error;
1302 }
1303
1304 STATIC int
1305 xfs_ioc_getxflags(
1306 xfs_inode_t *ip,
1307 void __user *arg)
1308 {
1309 unsigned int flags;
1310
1311 flags = xfs_di2lxflags(ip->i_d.di_flags);
1312 if (copy_to_user(arg, &flags, sizeof(flags)))
1313 return -EFAULT;
1314 return 0;
1315 }
1316
1317 STATIC int
1318 xfs_ioc_setxflags(
1319 xfs_inode_t *ip,
1320 struct file *filp,
1321 void __user *arg)
1322 {
1323 struct fsxattr fa;
1324 unsigned int flags;
1325 unsigned int mask;
1326 int error;
1327
1328 if (copy_from_user(&flags, arg, sizeof(flags)))
1329 return -EFAULT;
1330
1331 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1332 FS_NOATIME_FL | FS_NODUMP_FL | \
1333 FS_SYNC_FL))
1334 return -EOPNOTSUPP;
1335
1336 mask = FSX_XFLAGS;
1337 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1338 mask |= FSX_NONBLOCK;
1339 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1340
1341 error = mnt_want_write_file(filp);
1342 if (error)
1343 return error;
1344 error = xfs_ioctl_setattr(ip, &fa, mask);
1345 mnt_drop_write_file(filp);
1346 return error;
1347 }
1348
1349 STATIC int
1350 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1351 {
1352 struct getbmap __user *base = *ap;
1353
1354 /* copy only getbmap portion (not getbmapx) */
1355 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1356 return -EFAULT;
1357
1358 *ap += sizeof(struct getbmap);
1359 return 0;
1360 }
1361
1362 STATIC int
1363 xfs_ioc_getbmap(
1364 struct xfs_inode *ip,
1365 int ioflags,
1366 unsigned int cmd,
1367 void __user *arg)
1368 {
1369 struct getbmapx bmx;
1370 int error;
1371
1372 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1373 return -EFAULT;
1374
1375 if (bmx.bmv_count < 2)
1376 return -EINVAL;
1377
1378 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1379 if (ioflags & XFS_IO_INVIS)
1380 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1381
1382 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1383 (struct getbmap *)arg+1);
1384 if (error)
1385 return error;
1386
1387 /* copy back header - only size of getbmap */
1388 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1389 return -EFAULT;
1390 return 0;
1391 }
1392
1393 STATIC int
1394 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1395 {
1396 struct getbmapx __user *base = *ap;
1397
1398 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1399 return -EFAULT;
1400
1401 *ap += sizeof(struct getbmapx);
1402 return 0;
1403 }
1404
1405 STATIC int
1406 xfs_ioc_getbmapx(
1407 struct xfs_inode *ip,
1408 void __user *arg)
1409 {
1410 struct getbmapx bmx;
1411 int error;
1412
1413 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1414 return -EFAULT;
1415
1416 if (bmx.bmv_count < 2)
1417 return -EINVAL;
1418
1419 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1420 return -EINVAL;
1421
1422 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1423 (struct getbmapx *)arg+1);
1424 if (error)
1425 return error;
1426
1427 /* copy back header */
1428 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1429 return -EFAULT;
1430
1431 return 0;
1432 }
1433
1434 int
1435 xfs_ioc_swapext(
1436 xfs_swapext_t *sxp)
1437 {
1438 xfs_inode_t *ip, *tip;
1439 struct fd f, tmp;
1440 int error = 0;
1441
1442 /* Pull information for the target fd */
1443 f = fdget((int)sxp->sx_fdtarget);
1444 if (!f.file) {
1445 error = -EINVAL;
1446 goto out;
1447 }
1448
1449 if (!(f.file->f_mode & FMODE_WRITE) ||
1450 !(f.file->f_mode & FMODE_READ) ||
1451 (f.file->f_flags & O_APPEND)) {
1452 error = -EBADF;
1453 goto out_put_file;
1454 }
1455
1456 tmp = fdget((int)sxp->sx_fdtmp);
1457 if (!tmp.file) {
1458 error = -EINVAL;
1459 goto out_put_file;
1460 }
1461
1462 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1463 !(tmp.file->f_mode & FMODE_READ) ||
1464 (tmp.file->f_flags & O_APPEND)) {
1465 error = -EBADF;
1466 goto out_put_tmp_file;
1467 }
1468
1469 if (IS_SWAPFILE(file_inode(f.file)) ||
1470 IS_SWAPFILE(file_inode(tmp.file))) {
1471 error = -EINVAL;
1472 goto out_put_tmp_file;
1473 }
1474
1475 ip = XFS_I(file_inode(f.file));
1476 tip = XFS_I(file_inode(tmp.file));
1477
1478 if (ip->i_mount != tip->i_mount) {
1479 error = -EINVAL;
1480 goto out_put_tmp_file;
1481 }
1482
1483 if (ip->i_ino == tip->i_ino) {
1484 error = -EINVAL;
1485 goto out_put_tmp_file;
1486 }
1487
1488 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1489 error = -EIO;
1490 goto out_put_tmp_file;
1491 }
1492
1493 error = xfs_swap_extents(ip, tip, sxp);
1494
1495 out_put_tmp_file:
1496 fdput(tmp);
1497 out_put_file:
1498 fdput(f);
1499 out:
1500 return error;
1501 }
1502
1503 /*
1504 * Note: some of the ioctl's return positive numbers as a
1505 * byte count indicating success, such as readlink_by_handle.
1506 * So we don't "sign flip" like most other routines. This means
1507 * true errors need to be returned as a negative value.
1508 */
1509 long
1510 xfs_file_ioctl(
1511 struct file *filp,
1512 unsigned int cmd,
1513 unsigned long p)
1514 {
1515 struct inode *inode = file_inode(filp);
1516 struct xfs_inode *ip = XFS_I(inode);
1517 struct xfs_mount *mp = ip->i_mount;
1518 void __user *arg = (void __user *)p;
1519 int ioflags = 0;
1520 int error;
1521
1522 if (filp->f_mode & FMODE_NOCMTIME)
1523 ioflags |= XFS_IO_INVIS;
1524
1525 trace_xfs_file_ioctl(ip);
1526
1527 switch (cmd) {
1528 case FITRIM:
1529 return xfs_ioc_trim(mp, arg);
1530 case XFS_IOC_ALLOCSP:
1531 case XFS_IOC_FREESP:
1532 case XFS_IOC_RESVSP:
1533 case XFS_IOC_UNRESVSP:
1534 case XFS_IOC_ALLOCSP64:
1535 case XFS_IOC_FREESP64:
1536 case XFS_IOC_RESVSP64:
1537 case XFS_IOC_UNRESVSP64:
1538 case XFS_IOC_ZERO_RANGE: {
1539 xfs_flock64_t bf;
1540
1541 if (copy_from_user(&bf, arg, sizeof(bf)))
1542 return -EFAULT;
1543 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1544 }
1545 case XFS_IOC_DIOINFO: {
1546 struct dioattr da;
1547 xfs_buftarg_t *target =
1548 XFS_IS_REALTIME_INODE(ip) ?
1549 mp->m_rtdev_targp : mp->m_ddev_targp;
1550
1551 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1552 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1553
1554 if (copy_to_user(arg, &da, sizeof(da)))
1555 return -EFAULT;
1556 return 0;
1557 }
1558
1559 case XFS_IOC_FSBULKSTAT_SINGLE:
1560 case XFS_IOC_FSBULKSTAT:
1561 case XFS_IOC_FSINUMBERS:
1562 return xfs_ioc_bulkstat(mp, cmd, arg);
1563
1564 case XFS_IOC_FSGEOMETRY_V1:
1565 return xfs_ioc_fsgeometry_v1(mp, arg);
1566
1567 case XFS_IOC_FSGEOMETRY:
1568 return xfs_ioc_fsgeometry(mp, arg);
1569
1570 case XFS_IOC_GETVERSION:
1571 return put_user(inode->i_generation, (int __user *)arg);
1572
1573 case XFS_IOC_FSGETXATTR:
1574 return xfs_ioc_fsgetxattr(ip, 0, arg);
1575 case XFS_IOC_FSGETXATTRA:
1576 return xfs_ioc_fsgetxattr(ip, 1, arg);
1577 case XFS_IOC_FSSETXATTR:
1578 return xfs_ioc_fssetxattr(ip, filp, arg);
1579 case XFS_IOC_GETXFLAGS:
1580 return xfs_ioc_getxflags(ip, arg);
1581 case XFS_IOC_SETXFLAGS:
1582 return xfs_ioc_setxflags(ip, filp, arg);
1583
1584 case XFS_IOC_FSSETDM: {
1585 struct fsdmidata dmi;
1586
1587 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1588 return -EFAULT;
1589
1590 error = mnt_want_write_file(filp);
1591 if (error)
1592 return error;
1593
1594 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1595 dmi.fsd_dmstate);
1596 mnt_drop_write_file(filp);
1597 return error;
1598 }
1599
1600 case XFS_IOC_GETBMAP:
1601 case XFS_IOC_GETBMAPA:
1602 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1603
1604 case XFS_IOC_GETBMAPX:
1605 return xfs_ioc_getbmapx(ip, arg);
1606
1607 case XFS_IOC_FD_TO_HANDLE:
1608 case XFS_IOC_PATH_TO_HANDLE:
1609 case XFS_IOC_PATH_TO_FSHANDLE: {
1610 xfs_fsop_handlereq_t hreq;
1611
1612 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1613 return -EFAULT;
1614 return xfs_find_handle(cmd, &hreq);
1615 }
1616 case XFS_IOC_OPEN_BY_HANDLE: {
1617 xfs_fsop_handlereq_t hreq;
1618
1619 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1620 return -EFAULT;
1621 return xfs_open_by_handle(filp, &hreq);
1622 }
1623 case XFS_IOC_FSSETDM_BY_HANDLE:
1624 return xfs_fssetdm_by_handle(filp, arg);
1625
1626 case XFS_IOC_READLINK_BY_HANDLE: {
1627 xfs_fsop_handlereq_t hreq;
1628
1629 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1630 return -EFAULT;
1631 return xfs_readlink_by_handle(filp, &hreq);
1632 }
1633 case XFS_IOC_ATTRLIST_BY_HANDLE:
1634 return xfs_attrlist_by_handle(filp, arg);
1635
1636 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1637 return xfs_attrmulti_by_handle(filp, arg);
1638
1639 case XFS_IOC_SWAPEXT: {
1640 struct xfs_swapext sxp;
1641
1642 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1643 return -EFAULT;
1644 error = mnt_want_write_file(filp);
1645 if (error)
1646 return error;
1647 error = xfs_ioc_swapext(&sxp);
1648 mnt_drop_write_file(filp);
1649 return error;
1650 }
1651
1652 case XFS_IOC_FSCOUNTS: {
1653 xfs_fsop_counts_t out;
1654
1655 error = xfs_fs_counts(mp, &out);
1656 if (error)
1657 return error;
1658
1659 if (copy_to_user(arg, &out, sizeof(out)))
1660 return -EFAULT;
1661 return 0;
1662 }
1663
1664 case XFS_IOC_SET_RESBLKS: {
1665 xfs_fsop_resblks_t inout;
1666 __uint64_t in;
1667
1668 if (!capable(CAP_SYS_ADMIN))
1669 return -EPERM;
1670
1671 if (mp->m_flags & XFS_MOUNT_RDONLY)
1672 return -EROFS;
1673
1674 if (copy_from_user(&inout, arg, sizeof(inout)))
1675 return -EFAULT;
1676
1677 error = mnt_want_write_file(filp);
1678 if (error)
1679 return error;
1680
1681 /* input parameter is passed in resblks field of structure */
1682 in = inout.resblks;
1683 error = xfs_reserve_blocks(mp, &in, &inout);
1684 mnt_drop_write_file(filp);
1685 if (error)
1686 return error;
1687
1688 if (copy_to_user(arg, &inout, sizeof(inout)))
1689 return -EFAULT;
1690 return 0;
1691 }
1692
1693 case XFS_IOC_GET_RESBLKS: {
1694 xfs_fsop_resblks_t out;
1695
1696 if (!capable(CAP_SYS_ADMIN))
1697 return -EPERM;
1698
1699 error = xfs_reserve_blocks(mp, NULL, &out);
1700 if (error)
1701 return error;
1702
1703 if (copy_to_user(arg, &out, sizeof(out)))
1704 return -EFAULT;
1705
1706 return 0;
1707 }
1708
1709 case XFS_IOC_FSGROWFSDATA: {
1710 xfs_growfs_data_t in;
1711
1712 if (copy_from_user(&in, arg, sizeof(in)))
1713 return -EFAULT;
1714
1715 error = mnt_want_write_file(filp);
1716 if (error)
1717 return error;
1718 error = xfs_growfs_data(mp, &in);
1719 mnt_drop_write_file(filp);
1720 return error;
1721 }
1722
1723 case XFS_IOC_FSGROWFSLOG: {
1724 xfs_growfs_log_t in;
1725
1726 if (copy_from_user(&in, arg, sizeof(in)))
1727 return -EFAULT;
1728
1729 error = mnt_want_write_file(filp);
1730 if (error)
1731 return error;
1732 error = xfs_growfs_log(mp, &in);
1733 mnt_drop_write_file(filp);
1734 return error;
1735 }
1736
1737 case XFS_IOC_FSGROWFSRT: {
1738 xfs_growfs_rt_t in;
1739
1740 if (copy_from_user(&in, arg, sizeof(in)))
1741 return -EFAULT;
1742
1743 error = mnt_want_write_file(filp);
1744 if (error)
1745 return error;
1746 error = xfs_growfs_rt(mp, &in);
1747 mnt_drop_write_file(filp);
1748 return error;
1749 }
1750
1751 case XFS_IOC_GOINGDOWN: {
1752 __uint32_t in;
1753
1754 if (!capable(CAP_SYS_ADMIN))
1755 return -EPERM;
1756
1757 if (get_user(in, (__uint32_t __user *)arg))
1758 return -EFAULT;
1759
1760 return xfs_fs_goingdown(mp, in);
1761 }
1762
1763 case XFS_IOC_ERROR_INJECTION: {
1764 xfs_error_injection_t in;
1765
1766 if (!capable(CAP_SYS_ADMIN))
1767 return -EPERM;
1768
1769 if (copy_from_user(&in, arg, sizeof(in)))
1770 return -EFAULT;
1771
1772 return xfs_errortag_add(in.errtag, mp);
1773 }
1774
1775 case XFS_IOC_ERROR_CLEARALL:
1776 if (!capable(CAP_SYS_ADMIN))
1777 return -EPERM;
1778
1779 return xfs_errortag_clearall(mp, 1);
1780
1781 case XFS_IOC_FREE_EOFBLOCKS: {
1782 struct xfs_fs_eofblocks eofb;
1783 struct xfs_eofblocks keofb;
1784
1785 if (!capable(CAP_SYS_ADMIN))
1786 return -EPERM;
1787
1788 if (mp->m_flags & XFS_MOUNT_RDONLY)
1789 return -EROFS;
1790
1791 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1792 return -EFAULT;
1793
1794 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1795 if (error)
1796 return error;
1797
1798 return xfs_icache_free_eofblocks(mp, &keofb);
1799 }
1800
1801 default:
1802 return -ENOTTY;
1803 }
1804 }
Linux with added FPC-III support