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Merge branches 'x86/paravirt', 'x86/pat', 'x86/setup-v2', 'x86/subarch', 'x86/uaccess...
[deliverable/linux.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
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_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_dir2.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_btree.h"
38 #include "xfs_ialloc.h"
39 #include "xfs_rtalloc.h"
40 #include "xfs_itable.h"
41 #include "xfs_error.h"
42 #include "xfs_rw.h"
43 #include "xfs_acl.h"
44 #include "xfs_attr.h"
45 #include "xfs_bmap.h"
46 #include "xfs_buf_item.h"
47 #include "xfs_utils.h"
48 #include "xfs_dfrag.h"
49 #include "xfs_fsops.h"
50 #include "xfs_vnodeops.h"
51 #include "xfs_quota.h"
52 #include "xfs_inode_item.h"
53 #include "xfs_export.h"
54
55 #include <linux/capability.h>
56 #include <linux/dcache.h>
57 #include <linux/mount.h>
58 #include <linux/namei.h>
59 #include <linux/pagemap.h>
60 #include <linux/exportfs.h>
61
62 /*
63 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
64 * a file or fs handle.
65 *
66 * XFS_IOC_PATH_TO_FSHANDLE
67 * returns fs handle for a mount point or path within that mount point
68 * XFS_IOC_FD_TO_HANDLE
69 * returns full handle for a FD opened in user space
70 * XFS_IOC_PATH_TO_HANDLE
71 * returns full handle for a path
72 */
73 int
74 xfs_find_handle(
75 unsigned int cmd,
76 xfs_fsop_handlereq_t *hreq)
77 {
78 int hsize;
79 xfs_handle_t handle;
80 struct inode *inode;
81
82 memset((char *)&handle, 0, sizeof(handle));
83
84 switch (cmd) {
85 case XFS_IOC_PATH_TO_FSHANDLE:
86 case XFS_IOC_PATH_TO_HANDLE: {
87 struct path path;
88 int error = user_lpath((const char __user *)hreq->path, &path);
89 if (error)
90 return error;
91
92 ASSERT(path.dentry);
93 ASSERT(path.dentry->d_inode);
94 inode = igrab(path.dentry->d_inode);
95 path_put(&path);
96 break;
97 }
98
99 case XFS_IOC_FD_TO_HANDLE: {
100 struct file *file;
101
102 file = fget(hreq->fd);
103 if (!file)
104 return -EBADF;
105
106 ASSERT(file->f_path.dentry);
107 ASSERT(file->f_path.dentry->d_inode);
108 inode = igrab(file->f_path.dentry->d_inode);
109 fput(file);
110 break;
111 }
112
113 default:
114 ASSERT(0);
115 return -XFS_ERROR(EINVAL);
116 }
117
118 if (inode->i_sb->s_magic != XFS_SB_MAGIC) {
119 /* we're not in XFS anymore, Toto */
120 iput(inode);
121 return -XFS_ERROR(EINVAL);
122 }
123
124 switch (inode->i_mode & S_IFMT) {
125 case S_IFREG:
126 case S_IFDIR:
127 case S_IFLNK:
128 break;
129 default:
130 iput(inode);
131 return -XFS_ERROR(EBADF);
132 }
133
134 /* now we can grab the fsid */
135 memcpy(&handle.ha_fsid, XFS_I(inode)->i_mount->m_fixedfsid,
136 sizeof(xfs_fsid_t));
137 hsize = sizeof(xfs_fsid_t);
138
139 if (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
140 xfs_inode_t *ip = XFS_I(inode);
141 int lock_mode;
142
143 /* need to get access to the xfs_inode to read the generation */
144 lock_mode = xfs_ilock_map_shared(ip);
145
146 /* fill in fid section of handle from inode */
147 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
148 sizeof(handle.ha_fid.fid_len);
149 handle.ha_fid.fid_pad = 0;
150 handle.ha_fid.fid_gen = ip->i_d.di_gen;
151 handle.ha_fid.fid_ino = ip->i_ino;
152
153 xfs_iunlock_map_shared(ip, lock_mode);
154
155 hsize = XFS_HSIZE(handle);
156 }
157
158 /* now copy our handle into the user buffer & write out the size */
159 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
160 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) {
161 iput(inode);
162 return -XFS_ERROR(EFAULT);
163 }
164
165 iput(inode);
166 return 0;
167 }
168
169 /*
170 * No need to do permission checks on the various pathname components
171 * as the handle operations are privileged.
172 */
173 STATIC int
174 xfs_handle_acceptable(
175 void *context,
176 struct dentry *dentry)
177 {
178 return 1;
179 }
180
181 /*
182 * Convert userspace handle data into a dentry.
183 */
184 struct dentry *
185 xfs_handle_to_dentry(
186 struct file *parfilp,
187 void __user *uhandle,
188 u32 hlen)
189 {
190 xfs_handle_t handle;
191 struct xfs_fid64 fid;
192
193 /*
194 * Only allow handle opens under a directory.
195 */
196 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
197 return ERR_PTR(-ENOTDIR);
198
199 if (hlen != sizeof(xfs_handle_t))
200 return ERR_PTR(-EINVAL);
201 if (copy_from_user(&handle, uhandle, hlen))
202 return ERR_PTR(-EFAULT);
203 if (handle.ha_fid.fid_len !=
204 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
205 return ERR_PTR(-EINVAL);
206
207 memset(&fid, 0, sizeof(struct fid));
208 fid.ino = handle.ha_fid.fid_ino;
209 fid.gen = handle.ha_fid.fid_gen;
210
211 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
212 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
213 xfs_handle_acceptable, NULL);
214 }
215
216 STATIC struct dentry *
217 xfs_handlereq_to_dentry(
218 struct file *parfilp,
219 xfs_fsop_handlereq_t *hreq)
220 {
221 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
222 }
223
224 int
225 xfs_open_by_handle(
226 struct file *parfilp,
227 xfs_fsop_handlereq_t *hreq)
228 {
229 const struct cred *cred = current_cred();
230 int error;
231 int fd;
232 int permflag;
233 struct file *filp;
234 struct inode *inode;
235 struct dentry *dentry;
236
237 if (!capable(CAP_SYS_ADMIN))
238 return -XFS_ERROR(EPERM);
239
240 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
241 if (IS_ERR(dentry))
242 return PTR_ERR(dentry);
243 inode = dentry->d_inode;
244
245 /* Restrict xfs_open_by_handle to directories & regular files. */
246 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
247 error = -XFS_ERROR(EPERM);
248 goto out_dput;
249 }
250
251 #if BITS_PER_LONG != 32
252 hreq->oflags |= O_LARGEFILE;
253 #endif
254
255 /* Put open permission in namei format. */
256 permflag = hreq->oflags;
257 if ((permflag+1) & O_ACCMODE)
258 permflag++;
259 if (permflag & O_TRUNC)
260 permflag |= 2;
261
262 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
263 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
264 error = -XFS_ERROR(EPERM);
265 goto out_dput;
266 }
267
268 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
269 error = -XFS_ERROR(EACCES);
270 goto out_dput;
271 }
272
273 /* Can't write directories. */
274 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
275 error = -XFS_ERROR(EISDIR);
276 goto out_dput;
277 }
278
279 fd = get_unused_fd();
280 if (fd < 0) {
281 error = fd;
282 goto out_dput;
283 }
284
285 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
286 hreq->oflags, cred);
287 if (IS_ERR(filp)) {
288 put_unused_fd(fd);
289 return PTR_ERR(filp);
290 }
291
292 if (inode->i_mode & S_IFREG) {
293 filp->f_flags |= O_NOATIME;
294 filp->f_mode |= FMODE_NOCMTIME;
295 }
296
297 fd_install(fd, filp);
298 return fd;
299
300 out_dput:
301 dput(dentry);
302 return error;
303 }
304
305 /*
306 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
307 * unused first argument.
308 */
309 STATIC int
310 do_readlink(
311 char __user *buffer,
312 int buflen,
313 const char *link)
314 {
315 int len;
316
317 len = PTR_ERR(link);
318 if (IS_ERR(link))
319 goto out;
320
321 len = strlen(link);
322 if (len > (unsigned) buflen)
323 len = buflen;
324 if (copy_to_user(buffer, link, len))
325 len = -EFAULT;
326 out:
327 return len;
328 }
329
330
331 int
332 xfs_readlink_by_handle(
333 struct file *parfilp,
334 xfs_fsop_handlereq_t *hreq)
335 {
336 struct dentry *dentry;
337 __u32 olen;
338 void *link;
339 int error;
340
341 if (!capable(CAP_SYS_ADMIN))
342 return -XFS_ERROR(EPERM);
343
344 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
345 if (IS_ERR(dentry))
346 return PTR_ERR(dentry);
347
348 /* Restrict this handle operation to symlinks only. */
349 if (!S_ISLNK(dentry->d_inode->i_mode)) {
350 error = -XFS_ERROR(EINVAL);
351 goto out_dput;
352 }
353
354 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
355 error = -XFS_ERROR(EFAULT);
356 goto out_dput;
357 }
358
359 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
360 if (!link) {
361 error = -XFS_ERROR(ENOMEM);
362 goto out_dput;
363 }
364
365 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
366 if (error)
367 goto out_kfree;
368 error = do_readlink(hreq->ohandle, olen, link);
369 if (error)
370 goto out_kfree;
371
372 out_kfree:
373 kfree(link);
374 out_dput:
375 dput(dentry);
376 return error;
377 }
378
379 STATIC int
380 xfs_fssetdm_by_handle(
381 struct file *parfilp,
382 void __user *arg)
383 {
384 int error;
385 struct fsdmidata fsd;
386 xfs_fsop_setdm_handlereq_t dmhreq;
387 struct dentry *dentry;
388
389 if (!capable(CAP_MKNOD))
390 return -XFS_ERROR(EPERM);
391 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
392 return -XFS_ERROR(EFAULT);
393
394 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
395 if (IS_ERR(dentry))
396 return PTR_ERR(dentry);
397
398 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
399 error = -XFS_ERROR(EPERM);
400 goto out;
401 }
402
403 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
404 error = -XFS_ERROR(EFAULT);
405 goto out;
406 }
407
408 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
409 fsd.fsd_dmstate);
410
411 out:
412 dput(dentry);
413 return error;
414 }
415
416 STATIC int
417 xfs_attrlist_by_handle(
418 struct file *parfilp,
419 void __user *arg)
420 {
421 int error = -ENOMEM;
422 attrlist_cursor_kern_t *cursor;
423 xfs_fsop_attrlist_handlereq_t al_hreq;
424 struct dentry *dentry;
425 char *kbuf;
426
427 if (!capable(CAP_SYS_ADMIN))
428 return -XFS_ERROR(EPERM);
429 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
430 return -XFS_ERROR(EFAULT);
431 if (al_hreq.buflen > XATTR_LIST_MAX)
432 return -XFS_ERROR(EINVAL);
433
434 /*
435 * Reject flags, only allow namespaces.
436 */
437 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
438 return -XFS_ERROR(EINVAL);
439
440 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
441 if (IS_ERR(dentry))
442 return PTR_ERR(dentry);
443
444 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
445 if (!kbuf)
446 goto out_dput;
447
448 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
449 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
450 al_hreq.flags, cursor);
451 if (error)
452 goto out_kfree;
453
454 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
455 error = -EFAULT;
456
457 out_kfree:
458 kfree(kbuf);
459 out_dput:
460 dput(dentry);
461 return error;
462 }
463
464 int
465 xfs_attrmulti_attr_get(
466 struct inode *inode,
467 char *name,
468 char __user *ubuf,
469 __uint32_t *len,
470 __uint32_t flags)
471 {
472 char *kbuf;
473 int error = EFAULT;
474
475 if (*len > XATTR_SIZE_MAX)
476 return EINVAL;
477 kbuf = kmalloc(*len, GFP_KERNEL);
478 if (!kbuf)
479 return ENOMEM;
480
481 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
482 if (error)
483 goto out_kfree;
484
485 if (copy_to_user(ubuf, kbuf, *len))
486 error = EFAULT;
487
488 out_kfree:
489 kfree(kbuf);
490 return error;
491 }
492
493 int
494 xfs_attrmulti_attr_set(
495 struct inode *inode,
496 char *name,
497 const char __user *ubuf,
498 __uint32_t len,
499 __uint32_t flags)
500 {
501 char *kbuf;
502 int error = EFAULT;
503
504 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
505 return EPERM;
506 if (len > XATTR_SIZE_MAX)
507 return EINVAL;
508
509 kbuf = kmalloc(len, GFP_KERNEL);
510 if (!kbuf)
511 return ENOMEM;
512
513 if (copy_from_user(kbuf, ubuf, len))
514 goto out_kfree;
515
516 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
517
518 out_kfree:
519 kfree(kbuf);
520 return error;
521 }
522
523 int
524 xfs_attrmulti_attr_remove(
525 struct inode *inode,
526 char *name,
527 __uint32_t flags)
528 {
529 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
530 return EPERM;
531 return xfs_attr_remove(XFS_I(inode), name, flags);
532 }
533
534 STATIC int
535 xfs_attrmulti_by_handle(
536 struct file *parfilp,
537 void __user *arg)
538 {
539 int error;
540 xfs_attr_multiop_t *ops;
541 xfs_fsop_attrmulti_handlereq_t am_hreq;
542 struct dentry *dentry;
543 unsigned int i, size;
544 char *attr_name;
545
546 if (!capable(CAP_SYS_ADMIN))
547 return -XFS_ERROR(EPERM);
548 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
549 return -XFS_ERROR(EFAULT);
550
551 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
552 if (IS_ERR(dentry))
553 return PTR_ERR(dentry);
554
555 error = E2BIG;
556 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
557 if (!size || size > 16 * PAGE_SIZE)
558 goto out_dput;
559
560 error = ENOMEM;
561 ops = kmalloc(size, GFP_KERNEL);
562 if (!ops)
563 goto out_dput;
564
565 error = EFAULT;
566 if (copy_from_user(ops, am_hreq.ops, size))
567 goto out_kfree_ops;
568
569 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
570 if (!attr_name)
571 goto out_kfree_ops;
572
573
574 error = 0;
575 for (i = 0; i < am_hreq.opcount; i++) {
576 ops[i].am_error = strncpy_from_user(attr_name,
577 ops[i].am_attrname, MAXNAMELEN);
578 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
579 error = -ERANGE;
580 if (ops[i].am_error < 0)
581 break;
582
583 switch (ops[i].am_opcode) {
584 case ATTR_OP_GET:
585 ops[i].am_error = xfs_attrmulti_attr_get(
586 dentry->d_inode, attr_name,
587 ops[i].am_attrvalue, &ops[i].am_length,
588 ops[i].am_flags);
589 break;
590 case ATTR_OP_SET:
591 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
592 if (ops[i].am_error)
593 break;
594 ops[i].am_error = xfs_attrmulti_attr_set(
595 dentry->d_inode, attr_name,
596 ops[i].am_attrvalue, ops[i].am_length,
597 ops[i].am_flags);
598 mnt_drop_write(parfilp->f_path.mnt);
599 break;
600 case ATTR_OP_REMOVE:
601 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
602 if (ops[i].am_error)
603 break;
604 ops[i].am_error = xfs_attrmulti_attr_remove(
605 dentry->d_inode, attr_name,
606 ops[i].am_flags);
607 mnt_drop_write(parfilp->f_path.mnt);
608 break;
609 default:
610 ops[i].am_error = EINVAL;
611 }
612 }
613
614 if (copy_to_user(am_hreq.ops, ops, size))
615 error = XFS_ERROR(EFAULT);
616
617 kfree(attr_name);
618 out_kfree_ops:
619 kfree(ops);
620 out_dput:
621 dput(dentry);
622 return -error;
623 }
624
625 int
626 xfs_ioc_space(
627 struct xfs_inode *ip,
628 struct inode *inode,
629 struct file *filp,
630 int ioflags,
631 unsigned int cmd,
632 xfs_flock64_t *bf)
633 {
634 int attr_flags = 0;
635 int error;
636
637 /*
638 * Only allow the sys admin to reserve space unless
639 * unwritten extents are enabled.
640 */
641 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
642 !capable(CAP_SYS_ADMIN))
643 return -XFS_ERROR(EPERM);
644
645 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
646 return -XFS_ERROR(EPERM);
647
648 if (!(filp->f_mode & FMODE_WRITE))
649 return -XFS_ERROR(EBADF);
650
651 if (!S_ISREG(inode->i_mode))
652 return -XFS_ERROR(EINVAL);
653
654 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
655 attr_flags |= XFS_ATTR_NONBLOCK;
656 if (ioflags & IO_INVIS)
657 attr_flags |= XFS_ATTR_DMI;
658
659 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
660 return -error;
661 }
662
663 STATIC int
664 xfs_ioc_bulkstat(
665 xfs_mount_t *mp,
666 unsigned int cmd,
667 void __user *arg)
668 {
669 xfs_fsop_bulkreq_t bulkreq;
670 int count; /* # of records returned */
671 xfs_ino_t inlast; /* last inode number */
672 int done;
673 int error;
674
675 /* done = 1 if there are more stats to get and if bulkstat */
676 /* should be called again (unused here, but used in dmapi) */
677
678 if (!capable(CAP_SYS_ADMIN))
679 return -EPERM;
680
681 if (XFS_FORCED_SHUTDOWN(mp))
682 return -XFS_ERROR(EIO);
683
684 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
685 return -XFS_ERROR(EFAULT);
686
687 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
688 return -XFS_ERROR(EFAULT);
689
690 if ((count = bulkreq.icount) <= 0)
691 return -XFS_ERROR(EINVAL);
692
693 if (bulkreq.ubuffer == NULL)
694 return -XFS_ERROR(EINVAL);
695
696 if (cmd == XFS_IOC_FSINUMBERS)
697 error = xfs_inumbers(mp, &inlast, &count,
698 bulkreq.ubuffer, xfs_inumbers_fmt);
699 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
700 error = xfs_bulkstat_single(mp, &inlast,
701 bulkreq.ubuffer, &done);
702 else /* XFS_IOC_FSBULKSTAT */
703 error = xfs_bulkstat(mp, &inlast, &count,
704 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
705 sizeof(xfs_bstat_t), bulkreq.ubuffer,
706 BULKSTAT_FG_QUICK, &done);
707
708 if (error)
709 return -error;
710
711 if (bulkreq.ocount != NULL) {
712 if (copy_to_user(bulkreq.lastip, &inlast,
713 sizeof(xfs_ino_t)))
714 return -XFS_ERROR(EFAULT);
715
716 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
717 return -XFS_ERROR(EFAULT);
718 }
719
720 return 0;
721 }
722
723 STATIC int
724 xfs_ioc_fsgeometry_v1(
725 xfs_mount_t *mp,
726 void __user *arg)
727 {
728 xfs_fsop_geom_v1_t fsgeo;
729 int error;
730
731 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
732 if (error)
733 return -error;
734
735 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
736 return -XFS_ERROR(EFAULT);
737 return 0;
738 }
739
740 STATIC int
741 xfs_ioc_fsgeometry(
742 xfs_mount_t *mp,
743 void __user *arg)
744 {
745 xfs_fsop_geom_t fsgeo;
746 int error;
747
748 error = xfs_fs_geometry(mp, &fsgeo, 4);
749 if (error)
750 return -error;
751
752 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
753 return -XFS_ERROR(EFAULT);
754 return 0;
755 }
756
757 /*
758 * Linux extended inode flags interface.
759 */
760
761 STATIC unsigned int
762 xfs_merge_ioc_xflags(
763 unsigned int flags,
764 unsigned int start)
765 {
766 unsigned int xflags = start;
767
768 if (flags & FS_IMMUTABLE_FL)
769 xflags |= XFS_XFLAG_IMMUTABLE;
770 else
771 xflags &= ~XFS_XFLAG_IMMUTABLE;
772 if (flags & FS_APPEND_FL)
773 xflags |= XFS_XFLAG_APPEND;
774 else
775 xflags &= ~XFS_XFLAG_APPEND;
776 if (flags & FS_SYNC_FL)
777 xflags |= XFS_XFLAG_SYNC;
778 else
779 xflags &= ~XFS_XFLAG_SYNC;
780 if (flags & FS_NOATIME_FL)
781 xflags |= XFS_XFLAG_NOATIME;
782 else
783 xflags &= ~XFS_XFLAG_NOATIME;
784 if (flags & FS_NODUMP_FL)
785 xflags |= XFS_XFLAG_NODUMP;
786 else
787 xflags &= ~XFS_XFLAG_NODUMP;
788
789 return xflags;
790 }
791
792 STATIC unsigned int
793 xfs_di2lxflags(
794 __uint16_t di_flags)
795 {
796 unsigned int flags = 0;
797
798 if (di_flags & XFS_DIFLAG_IMMUTABLE)
799 flags |= FS_IMMUTABLE_FL;
800 if (di_flags & XFS_DIFLAG_APPEND)
801 flags |= FS_APPEND_FL;
802 if (di_flags & XFS_DIFLAG_SYNC)
803 flags |= FS_SYNC_FL;
804 if (di_flags & XFS_DIFLAG_NOATIME)
805 flags |= FS_NOATIME_FL;
806 if (di_flags & XFS_DIFLAG_NODUMP)
807 flags |= FS_NODUMP_FL;
808 return flags;
809 }
810
811 STATIC int
812 xfs_ioc_fsgetxattr(
813 xfs_inode_t *ip,
814 int attr,
815 void __user *arg)
816 {
817 struct fsxattr fa;
818
819 xfs_ilock(ip, XFS_ILOCK_SHARED);
820 fa.fsx_xflags = xfs_ip2xflags(ip);
821 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
822 fa.fsx_projid = ip->i_d.di_projid;
823
824 if (attr) {
825 if (ip->i_afp) {
826 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
827 fa.fsx_nextents = ip->i_afp->if_bytes /
828 sizeof(xfs_bmbt_rec_t);
829 else
830 fa.fsx_nextents = ip->i_d.di_anextents;
831 } else
832 fa.fsx_nextents = 0;
833 } else {
834 if (ip->i_df.if_flags & XFS_IFEXTENTS)
835 fa.fsx_nextents = ip->i_df.if_bytes /
836 sizeof(xfs_bmbt_rec_t);
837 else
838 fa.fsx_nextents = ip->i_d.di_nextents;
839 }
840 xfs_iunlock(ip, XFS_ILOCK_SHARED);
841
842 if (copy_to_user(arg, &fa, sizeof(fa)))
843 return -EFAULT;
844 return 0;
845 }
846
847 STATIC void
848 xfs_set_diflags(
849 struct xfs_inode *ip,
850 unsigned int xflags)
851 {
852 unsigned int di_flags;
853
854 /* can't set PREALLOC this way, just preserve it */
855 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
856 if (xflags & XFS_XFLAG_IMMUTABLE)
857 di_flags |= XFS_DIFLAG_IMMUTABLE;
858 if (xflags & XFS_XFLAG_APPEND)
859 di_flags |= XFS_DIFLAG_APPEND;
860 if (xflags & XFS_XFLAG_SYNC)
861 di_flags |= XFS_DIFLAG_SYNC;
862 if (xflags & XFS_XFLAG_NOATIME)
863 di_flags |= XFS_DIFLAG_NOATIME;
864 if (xflags & XFS_XFLAG_NODUMP)
865 di_flags |= XFS_DIFLAG_NODUMP;
866 if (xflags & XFS_XFLAG_PROJINHERIT)
867 di_flags |= XFS_DIFLAG_PROJINHERIT;
868 if (xflags & XFS_XFLAG_NODEFRAG)
869 di_flags |= XFS_DIFLAG_NODEFRAG;
870 if (xflags & XFS_XFLAG_FILESTREAM)
871 di_flags |= XFS_DIFLAG_FILESTREAM;
872 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
873 if (xflags & XFS_XFLAG_RTINHERIT)
874 di_flags |= XFS_DIFLAG_RTINHERIT;
875 if (xflags & XFS_XFLAG_NOSYMLINKS)
876 di_flags |= XFS_DIFLAG_NOSYMLINKS;
877 if (xflags & XFS_XFLAG_EXTSZINHERIT)
878 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
879 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
880 if (xflags & XFS_XFLAG_REALTIME)
881 di_flags |= XFS_DIFLAG_REALTIME;
882 if (xflags & XFS_XFLAG_EXTSIZE)
883 di_flags |= XFS_DIFLAG_EXTSIZE;
884 }
885
886 ip->i_d.di_flags = di_flags;
887 }
888
889 STATIC void
890 xfs_diflags_to_linux(
891 struct xfs_inode *ip)
892 {
893 struct inode *inode = VFS_I(ip);
894 unsigned int xflags = xfs_ip2xflags(ip);
895
896 if (xflags & XFS_XFLAG_IMMUTABLE)
897 inode->i_flags |= S_IMMUTABLE;
898 else
899 inode->i_flags &= ~S_IMMUTABLE;
900 if (xflags & XFS_XFLAG_APPEND)
901 inode->i_flags |= S_APPEND;
902 else
903 inode->i_flags &= ~S_APPEND;
904 if (xflags & XFS_XFLAG_SYNC)
905 inode->i_flags |= S_SYNC;
906 else
907 inode->i_flags &= ~S_SYNC;
908 if (xflags & XFS_XFLAG_NOATIME)
909 inode->i_flags |= S_NOATIME;
910 else
911 inode->i_flags &= ~S_NOATIME;
912 }
913
914 #define FSX_PROJID 1
915 #define FSX_EXTSIZE 2
916 #define FSX_XFLAGS 4
917 #define FSX_NONBLOCK 8
918
919 STATIC int
920 xfs_ioctl_setattr(
921 xfs_inode_t *ip,
922 struct fsxattr *fa,
923 int mask)
924 {
925 struct xfs_mount *mp = ip->i_mount;
926 struct xfs_trans *tp;
927 unsigned int lock_flags = 0;
928 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
929 struct xfs_dquot *olddquot = NULL;
930 int code;
931
932 xfs_itrace_entry(ip);
933
934 if (mp->m_flags & XFS_MOUNT_RDONLY)
935 return XFS_ERROR(EROFS);
936 if (XFS_FORCED_SHUTDOWN(mp))
937 return XFS_ERROR(EIO);
938
939 /*
940 * If disk quotas is on, we make sure that the dquots do exist on disk,
941 * before we start any other transactions. Trying to do this later
942 * is messy. We don't care to take a readlock to look at the ids
943 * in inode here, because we can't hold it across the trans_reserve.
944 * If the IDs do change before we take the ilock, we're covered
945 * because the i_*dquot fields will get updated anyway.
946 */
947 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
948 code = XFS_QM_DQVOPALLOC(mp, ip, ip->i_d.di_uid,
949 ip->i_d.di_gid, fa->fsx_projid,
950 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
951 if (code)
952 return code;
953 }
954
955 /*
956 * For the other attributes, we acquire the inode lock and
957 * first do an error checking pass.
958 */
959 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
960 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
961 if (code)
962 goto error_return;
963
964 lock_flags = XFS_ILOCK_EXCL;
965 xfs_ilock(ip, lock_flags);
966
967 /*
968 * CAP_FOWNER overrides the following restrictions:
969 *
970 * The user ID of the calling process must be equal
971 * to the file owner ID, except in cases where the
972 * CAP_FSETID capability is applicable.
973 */
974 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
975 code = XFS_ERROR(EPERM);
976 goto error_return;
977 }
978
979 /*
980 * Do a quota reservation only if projid is actually going to change.
981 */
982 if (mask & FSX_PROJID) {
983 if (XFS_IS_PQUOTA_ON(mp) &&
984 ip->i_d.di_projid != fa->fsx_projid) {
985 ASSERT(tp);
986 code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
987 capable(CAP_FOWNER) ?
988 XFS_QMOPT_FORCE_RES : 0);
989 if (code) /* out of quota */
990 goto error_return;
991 }
992 }
993
994 if (mask & FSX_EXTSIZE) {
995 /*
996 * Can't change extent size if any extents are allocated.
997 */
998 if (ip->i_d.di_nextents &&
999 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1000 fa->fsx_extsize)) {
1001 code = XFS_ERROR(EINVAL); /* EFBIG? */
1002 goto error_return;
1003 }
1004
1005 /*
1006 * Extent size must be a multiple of the appropriate block
1007 * size, if set at all.
1008 */
1009 if (fa->fsx_extsize != 0) {
1010 xfs_extlen_t size;
1011
1012 if (XFS_IS_REALTIME_INODE(ip) ||
1013 ((mask & FSX_XFLAGS) &&
1014 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1015 size = mp->m_sb.sb_rextsize <<
1016 mp->m_sb.sb_blocklog;
1017 } else {
1018 size = mp->m_sb.sb_blocksize;
1019 }
1020
1021 if (fa->fsx_extsize % size) {
1022 code = XFS_ERROR(EINVAL);
1023 goto error_return;
1024 }
1025 }
1026 }
1027
1028
1029 if (mask & FSX_XFLAGS) {
1030 /*
1031 * Can't change realtime flag if any extents are allocated.
1032 */
1033 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1034 (XFS_IS_REALTIME_INODE(ip)) !=
1035 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1036 code = XFS_ERROR(EINVAL); /* EFBIG? */
1037 goto error_return;
1038 }
1039
1040 /*
1041 * If realtime flag is set then must have realtime data.
1042 */
1043 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1044 if ((mp->m_sb.sb_rblocks == 0) ||
1045 (mp->m_sb.sb_rextsize == 0) ||
1046 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1047 code = XFS_ERROR(EINVAL);
1048 goto error_return;
1049 }
1050 }
1051
1052 /*
1053 * Can't modify an immutable/append-only file unless
1054 * we have appropriate permission.
1055 */
1056 if ((ip->i_d.di_flags &
1057 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1058 (fa->fsx_xflags &
1059 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1060 !capable(CAP_LINUX_IMMUTABLE)) {
1061 code = XFS_ERROR(EPERM);
1062 goto error_return;
1063 }
1064 }
1065
1066 xfs_trans_ijoin(tp, ip, lock_flags);
1067 xfs_trans_ihold(tp, ip);
1068
1069 /*
1070 * Change file ownership. Must be the owner or privileged.
1071 */
1072 if (mask & FSX_PROJID) {
1073 /*
1074 * CAP_FSETID overrides the following restrictions:
1075 *
1076 * The set-user-ID and set-group-ID bits of a file will be
1077 * cleared upon successful return from chown()
1078 */
1079 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1080 !capable(CAP_FSETID))
1081 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1082
1083 /*
1084 * Change the ownerships and register quota modifications
1085 * in the transaction.
1086 */
1087 if (ip->i_d.di_projid != fa->fsx_projid) {
1088 if (XFS_IS_PQUOTA_ON(mp)) {
1089 olddquot = XFS_QM_DQVOPCHOWN(mp, tp, ip,
1090 &ip->i_gdquot, gdqp);
1091 }
1092 ip->i_d.di_projid = fa->fsx_projid;
1093
1094 /*
1095 * We may have to rev the inode as well as
1096 * the superblock version number since projids didn't
1097 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1098 */
1099 if (ip->i_d.di_version == 1)
1100 xfs_bump_ino_vers2(tp, ip);
1101 }
1102
1103 }
1104
1105 if (mask & FSX_EXTSIZE)
1106 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1107 if (mask & FSX_XFLAGS) {
1108 xfs_set_diflags(ip, fa->fsx_xflags);
1109 xfs_diflags_to_linux(ip);
1110 }
1111
1112 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1113 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1114
1115 XFS_STATS_INC(xs_ig_attrchg);
1116
1117 /*
1118 * If this is a synchronous mount, make sure that the
1119 * transaction goes to disk before returning to the user.
1120 * This is slightly sub-optimal in that truncates require
1121 * two sync transactions instead of one for wsync filesystems.
1122 * One for the truncate and one for the timestamps since we
1123 * don't want to change the timestamps unless we're sure the
1124 * truncate worked. Truncates are less than 1% of the laddis
1125 * mix so this probably isn't worth the trouble to optimize.
1126 */
1127 if (mp->m_flags & XFS_MOUNT_WSYNC)
1128 xfs_trans_set_sync(tp);
1129 code = xfs_trans_commit(tp, 0);
1130 xfs_iunlock(ip, lock_flags);
1131
1132 /*
1133 * Release any dquot(s) the inode had kept before chown.
1134 */
1135 XFS_QM_DQRELE(mp, olddquot);
1136 XFS_QM_DQRELE(mp, udqp);
1137 XFS_QM_DQRELE(mp, gdqp);
1138
1139 if (code)
1140 return code;
1141
1142 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1143 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1144 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1145 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1146 }
1147
1148 return 0;
1149
1150 error_return:
1151 XFS_QM_DQRELE(mp, udqp);
1152 XFS_QM_DQRELE(mp, gdqp);
1153 xfs_trans_cancel(tp, 0);
1154 if (lock_flags)
1155 xfs_iunlock(ip, lock_flags);
1156 return code;
1157 }
1158
1159 STATIC int
1160 xfs_ioc_fssetxattr(
1161 xfs_inode_t *ip,
1162 struct file *filp,
1163 void __user *arg)
1164 {
1165 struct fsxattr fa;
1166 unsigned int mask;
1167
1168 if (copy_from_user(&fa, arg, sizeof(fa)))
1169 return -EFAULT;
1170
1171 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1172 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1173 mask |= FSX_NONBLOCK;
1174
1175 return -xfs_ioctl_setattr(ip, &fa, mask);
1176 }
1177
1178 STATIC int
1179 xfs_ioc_getxflags(
1180 xfs_inode_t *ip,
1181 void __user *arg)
1182 {
1183 unsigned int flags;
1184
1185 flags = xfs_di2lxflags(ip->i_d.di_flags);
1186 if (copy_to_user(arg, &flags, sizeof(flags)))
1187 return -EFAULT;
1188 return 0;
1189 }
1190
1191 STATIC int
1192 xfs_ioc_setxflags(
1193 xfs_inode_t *ip,
1194 struct file *filp,
1195 void __user *arg)
1196 {
1197 struct fsxattr fa;
1198 unsigned int flags;
1199 unsigned int mask;
1200
1201 if (copy_from_user(&flags, arg, sizeof(flags)))
1202 return -EFAULT;
1203
1204 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1205 FS_NOATIME_FL | FS_NODUMP_FL | \
1206 FS_SYNC_FL))
1207 return -EOPNOTSUPP;
1208
1209 mask = FSX_XFLAGS;
1210 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1211 mask |= FSX_NONBLOCK;
1212 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1213
1214 return -xfs_ioctl_setattr(ip, &fa, mask);
1215 }
1216
1217 STATIC int
1218 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1219 {
1220 struct getbmap __user *base = *ap;
1221
1222 /* copy only getbmap portion (not getbmapx) */
1223 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1224 return XFS_ERROR(EFAULT);
1225
1226 *ap += sizeof(struct getbmap);
1227 return 0;
1228 }
1229
1230 STATIC int
1231 xfs_ioc_getbmap(
1232 struct xfs_inode *ip,
1233 int ioflags,
1234 unsigned int cmd,
1235 void __user *arg)
1236 {
1237 struct getbmapx bmx;
1238 int error;
1239
1240 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1241 return -XFS_ERROR(EFAULT);
1242
1243 if (bmx.bmv_count < 2)
1244 return -XFS_ERROR(EINVAL);
1245
1246 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1247 if (ioflags & IO_INVIS)
1248 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1249
1250 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1251 (struct getbmap *)arg+1);
1252 if (error)
1253 return -error;
1254
1255 /* copy back header - only size of getbmap */
1256 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1257 return -XFS_ERROR(EFAULT);
1258 return 0;
1259 }
1260
1261 STATIC int
1262 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1263 {
1264 struct getbmapx __user *base = *ap;
1265
1266 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1267 return XFS_ERROR(EFAULT);
1268
1269 *ap += sizeof(struct getbmapx);
1270 return 0;
1271 }
1272
1273 STATIC int
1274 xfs_ioc_getbmapx(
1275 struct xfs_inode *ip,
1276 void __user *arg)
1277 {
1278 struct getbmapx bmx;
1279 int error;
1280
1281 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1282 return -XFS_ERROR(EFAULT);
1283
1284 if (bmx.bmv_count < 2)
1285 return -XFS_ERROR(EINVAL);
1286
1287 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1288 return -XFS_ERROR(EINVAL);
1289
1290 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1291 (struct getbmapx *)arg+1);
1292 if (error)
1293 return -error;
1294
1295 /* copy back header */
1296 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1297 return -XFS_ERROR(EFAULT);
1298
1299 return 0;
1300 }
1301
1302 /*
1303 * Note: some of the ioctl's return positive numbers as a
1304 * byte count indicating success, such as readlink_by_handle.
1305 * So we don't "sign flip" like most other routines. This means
1306 * true errors need to be returned as a negative value.
1307 */
1308 long
1309 xfs_file_ioctl(
1310 struct file *filp,
1311 unsigned int cmd,
1312 unsigned long p)
1313 {
1314 struct inode *inode = filp->f_path.dentry->d_inode;
1315 struct xfs_inode *ip = XFS_I(inode);
1316 struct xfs_mount *mp = ip->i_mount;
1317 void __user *arg = (void __user *)p;
1318 int ioflags = 0;
1319 int error;
1320
1321 if (filp->f_mode & FMODE_NOCMTIME)
1322 ioflags |= IO_INVIS;
1323
1324 xfs_itrace_entry(ip);
1325
1326 switch (cmd) {
1327 case XFS_IOC_ALLOCSP:
1328 case XFS_IOC_FREESP:
1329 case XFS_IOC_RESVSP:
1330 case XFS_IOC_UNRESVSP:
1331 case XFS_IOC_ALLOCSP64:
1332 case XFS_IOC_FREESP64:
1333 case XFS_IOC_RESVSP64:
1334 case XFS_IOC_UNRESVSP64: {
1335 xfs_flock64_t bf;
1336
1337 if (copy_from_user(&bf, arg, sizeof(bf)))
1338 return -XFS_ERROR(EFAULT);
1339 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1340 }
1341 case XFS_IOC_DIOINFO: {
1342 struct dioattr da;
1343 xfs_buftarg_t *target =
1344 XFS_IS_REALTIME_INODE(ip) ?
1345 mp->m_rtdev_targp : mp->m_ddev_targp;
1346
1347 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1348 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1349
1350 if (copy_to_user(arg, &da, sizeof(da)))
1351 return -XFS_ERROR(EFAULT);
1352 return 0;
1353 }
1354
1355 case XFS_IOC_FSBULKSTAT_SINGLE:
1356 case XFS_IOC_FSBULKSTAT:
1357 case XFS_IOC_FSINUMBERS:
1358 return xfs_ioc_bulkstat(mp, cmd, arg);
1359
1360 case XFS_IOC_FSGEOMETRY_V1:
1361 return xfs_ioc_fsgeometry_v1(mp, arg);
1362
1363 case XFS_IOC_FSGEOMETRY:
1364 return xfs_ioc_fsgeometry(mp, arg);
1365
1366 case XFS_IOC_GETVERSION:
1367 return put_user(inode->i_generation, (int __user *)arg);
1368
1369 case XFS_IOC_FSGETXATTR:
1370 return xfs_ioc_fsgetxattr(ip, 0, arg);
1371 case XFS_IOC_FSGETXATTRA:
1372 return xfs_ioc_fsgetxattr(ip, 1, arg);
1373 case XFS_IOC_FSSETXATTR:
1374 return xfs_ioc_fssetxattr(ip, filp, arg);
1375 case XFS_IOC_GETXFLAGS:
1376 return xfs_ioc_getxflags(ip, arg);
1377 case XFS_IOC_SETXFLAGS:
1378 return xfs_ioc_setxflags(ip, filp, arg);
1379
1380 case XFS_IOC_FSSETDM: {
1381 struct fsdmidata dmi;
1382
1383 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1384 return -XFS_ERROR(EFAULT);
1385
1386 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1387 dmi.fsd_dmstate);
1388 return -error;
1389 }
1390
1391 case XFS_IOC_GETBMAP:
1392 case XFS_IOC_GETBMAPA:
1393 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1394
1395 case XFS_IOC_GETBMAPX:
1396 return xfs_ioc_getbmapx(ip, arg);
1397
1398 case XFS_IOC_FD_TO_HANDLE:
1399 case XFS_IOC_PATH_TO_HANDLE:
1400 case XFS_IOC_PATH_TO_FSHANDLE: {
1401 xfs_fsop_handlereq_t hreq;
1402
1403 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1404 return -XFS_ERROR(EFAULT);
1405 return xfs_find_handle(cmd, &hreq);
1406 }
1407 case XFS_IOC_OPEN_BY_HANDLE: {
1408 xfs_fsop_handlereq_t hreq;
1409
1410 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1411 return -XFS_ERROR(EFAULT);
1412 return xfs_open_by_handle(filp, &hreq);
1413 }
1414 case XFS_IOC_FSSETDM_BY_HANDLE:
1415 return xfs_fssetdm_by_handle(filp, arg);
1416
1417 case XFS_IOC_READLINK_BY_HANDLE: {
1418 xfs_fsop_handlereq_t hreq;
1419
1420 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1421 return -XFS_ERROR(EFAULT);
1422 return xfs_readlink_by_handle(filp, &hreq);
1423 }
1424 case XFS_IOC_ATTRLIST_BY_HANDLE:
1425 return xfs_attrlist_by_handle(filp, arg);
1426
1427 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1428 return xfs_attrmulti_by_handle(filp, arg);
1429
1430 case XFS_IOC_SWAPEXT: {
1431 struct xfs_swapext sxp;
1432
1433 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1434 return -XFS_ERROR(EFAULT);
1435 error = xfs_swapext(&sxp);
1436 return -error;
1437 }
1438
1439 case XFS_IOC_FSCOUNTS: {
1440 xfs_fsop_counts_t out;
1441
1442 error = xfs_fs_counts(mp, &out);
1443 if (error)
1444 return -error;
1445
1446 if (copy_to_user(arg, &out, sizeof(out)))
1447 return -XFS_ERROR(EFAULT);
1448 return 0;
1449 }
1450
1451 case XFS_IOC_SET_RESBLKS: {
1452 xfs_fsop_resblks_t inout;
1453 __uint64_t in;
1454
1455 if (!capable(CAP_SYS_ADMIN))
1456 return -EPERM;
1457
1458 if (copy_from_user(&inout, arg, sizeof(inout)))
1459 return -XFS_ERROR(EFAULT);
1460
1461 /* input parameter is passed in resblks field of structure */
1462 in = inout.resblks;
1463 error = xfs_reserve_blocks(mp, &in, &inout);
1464 if (error)
1465 return -error;
1466
1467 if (copy_to_user(arg, &inout, sizeof(inout)))
1468 return -XFS_ERROR(EFAULT);
1469 return 0;
1470 }
1471
1472 case XFS_IOC_GET_RESBLKS: {
1473 xfs_fsop_resblks_t out;
1474
1475 if (!capable(CAP_SYS_ADMIN))
1476 return -EPERM;
1477
1478 error = xfs_reserve_blocks(mp, NULL, &out);
1479 if (error)
1480 return -error;
1481
1482 if (copy_to_user(arg, &out, sizeof(out)))
1483 return -XFS_ERROR(EFAULT);
1484
1485 return 0;
1486 }
1487
1488 case XFS_IOC_FSGROWFSDATA: {
1489 xfs_growfs_data_t in;
1490
1491 if (copy_from_user(&in, arg, sizeof(in)))
1492 return -XFS_ERROR(EFAULT);
1493
1494 error = xfs_growfs_data(mp, &in);
1495 return -error;
1496 }
1497
1498 case XFS_IOC_FSGROWFSLOG: {
1499 xfs_growfs_log_t in;
1500
1501 if (copy_from_user(&in, arg, sizeof(in)))
1502 return -XFS_ERROR(EFAULT);
1503
1504 error = xfs_growfs_log(mp, &in);
1505 return -error;
1506 }
1507
1508 case XFS_IOC_FSGROWFSRT: {
1509 xfs_growfs_rt_t in;
1510
1511 if (copy_from_user(&in, arg, sizeof(in)))
1512 return -XFS_ERROR(EFAULT);
1513
1514 error = xfs_growfs_rt(mp, &in);
1515 return -error;
1516 }
1517
1518 case XFS_IOC_GOINGDOWN: {
1519 __uint32_t in;
1520
1521 if (!capable(CAP_SYS_ADMIN))
1522 return -EPERM;
1523
1524 if (get_user(in, (__uint32_t __user *)arg))
1525 return -XFS_ERROR(EFAULT);
1526
1527 error = xfs_fs_goingdown(mp, in);
1528 return -error;
1529 }
1530
1531 case XFS_IOC_ERROR_INJECTION: {
1532 xfs_error_injection_t in;
1533
1534 if (!capable(CAP_SYS_ADMIN))
1535 return -EPERM;
1536
1537 if (copy_from_user(&in, arg, sizeof(in)))
1538 return -XFS_ERROR(EFAULT);
1539
1540 error = xfs_errortag_add(in.errtag, mp);
1541 return -error;
1542 }
1543
1544 case XFS_IOC_ERROR_CLEARALL:
1545 if (!capable(CAP_SYS_ADMIN))
1546 return -EPERM;
1547
1548 error = xfs_errortag_clearall(mp, 1);
1549 return -error;
1550
1551 default:
1552 return -ENOTTY;
1553 }
1554 }
Linux kernel - Deliverables
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