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Linux 3.16-rc2
[linux/fpc-iii.git] / fs / xfs / xfs_ioctl.c
blob8bc1bbce74517c95675dc661412e946e456fedbe
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 -XFS_ERROR(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 = -XFS_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 = -XFS_ERROR(EPERM);
232 goto out_dput;
233 }
234
235 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
236 error = -XFS_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 = -XFS_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 -XFS_ERROR(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 = -XFS_ERROR(EINVAL);
294 goto out_dput;
295 }
296
297 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
298 error = -XFS_ERROR(EFAULT);
299 goto out_dput;
300 }
301
302 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
303 if (!link) {
304 error = -XFS_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 XFS_ERROR(EPERM);
334
335 if (XFS_FORCED_SHUTDOWN(mp))
336 return XFS_ERROR(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 -XFS_ERROR(EPERM);
368 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
369 return -XFS_ERROR(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 = -XFS_ERROR(EPERM);
383 goto out;
384 }
385
386 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
387 error = -XFS_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 -XFS_ERROR(EPERM);
413 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
414 return -XFS_ERROR(EFAULT);
415 if (al_hreq.buflen < sizeof(struct attrlist) ||
416 al_hreq.buflen > XATTR_LIST_MAX)
417 return -XFS_ERROR(EINVAL);
418
419 /*
420 * Reject flags, only allow namespaces.
421 */
422 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
423 return -XFS_ERROR(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 int error = EFAULT;
488
489 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
490 return EPERM;
491 if (len > XATTR_SIZE_MAX)
492 return EINVAL;
493
494 kbuf = memdup_user(ubuf, len);
495 if (IS_ERR(kbuf))
496 return PTR_ERR(kbuf);
497
498 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
499
500 return error;
501 }
502
503 int
504 xfs_attrmulti_attr_remove(
505 struct inode *inode,
506 unsigned char *name,
507 __uint32_t flags)
508 {
509 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
510 return EPERM;
511 return xfs_attr_remove(XFS_I(inode), name, flags);
512 }
513
514 STATIC int
515 xfs_attrmulti_by_handle(
516 struct file *parfilp,
517 void __user *arg)
518 {
519 int error;
520 xfs_attr_multiop_t *ops;
521 xfs_fsop_attrmulti_handlereq_t am_hreq;
522 struct dentry *dentry;
523 unsigned int i, size;
524 unsigned char *attr_name;
525
526 if (!capable(CAP_SYS_ADMIN))
527 return -XFS_ERROR(EPERM);
528 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
529 return -XFS_ERROR(EFAULT);
530
531 /* overflow check */
532 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
533 return -E2BIG;
534
535 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
536 if (IS_ERR(dentry))
537 return PTR_ERR(dentry);
538
539 error = E2BIG;
540 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
541 if (!size || size > 16 * PAGE_SIZE)
542 goto out_dput;
543
544 ops = memdup_user(am_hreq.ops, size);
545 if (IS_ERR(ops)) {
546 error = -PTR_ERR(ops);
547 goto out_dput;
548 }
549
550 error = ENOMEM;
551 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
552 if (!attr_name)
553 goto out_kfree_ops;
554
555 error = 0;
556 for (i = 0; i < am_hreq.opcount; i++) {
557 ops[i].am_error = strncpy_from_user((char *)attr_name,
558 ops[i].am_attrname, MAXNAMELEN);
559 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
560 error = ERANGE;
561 if (ops[i].am_error < 0)
562 break;
563
564 switch (ops[i].am_opcode) {
565 case ATTR_OP_GET:
566 ops[i].am_error = xfs_attrmulti_attr_get(
567 dentry->d_inode, attr_name,
568 ops[i].am_attrvalue, &ops[i].am_length,
569 ops[i].am_flags);
570 break;
571 case ATTR_OP_SET:
572 ops[i].am_error = mnt_want_write_file(parfilp);
573 if (ops[i].am_error)
574 break;
575 ops[i].am_error = xfs_attrmulti_attr_set(
576 dentry->d_inode, attr_name,
577 ops[i].am_attrvalue, ops[i].am_length,
578 ops[i].am_flags);
579 mnt_drop_write_file(parfilp);
580 break;
581 case ATTR_OP_REMOVE:
582 ops[i].am_error = mnt_want_write_file(parfilp);
583 if (ops[i].am_error)
584 break;
585 ops[i].am_error = xfs_attrmulti_attr_remove(
586 dentry->d_inode, attr_name,
587 ops[i].am_flags);
588 mnt_drop_write_file(parfilp);
589 break;
590 default:
591 ops[i].am_error = EINVAL;
592 }
593 }
594
595 if (copy_to_user(am_hreq.ops, ops, size))
596 error = XFS_ERROR(EFAULT);
597
598 kfree(attr_name);
599 out_kfree_ops:
600 kfree(ops);
601 out_dput:
602 dput(dentry);
603 return -error;
604 }
605
606 int
607 xfs_ioc_space(
608 struct xfs_inode *ip,
609 struct inode *inode,
610 struct file *filp,
611 int ioflags,
612 unsigned int cmd,
613 xfs_flock64_t *bf)
614 {
615 struct xfs_mount *mp = ip->i_mount;
616 struct xfs_trans *tp;
617 struct iattr iattr;
618 bool setprealloc = false;
619 bool clrprealloc = false;
620 int error;
621
622 /*
623 * Only allow the sys admin to reserve space unless
624 * unwritten extents are enabled.
625 */
626 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
627 !capable(CAP_SYS_ADMIN))
628 return -XFS_ERROR(EPERM);
629
630 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
631 return -XFS_ERROR(EPERM);
632
633 if (!(filp->f_mode & FMODE_WRITE))
634 return -XFS_ERROR(EBADF);
635
636 if (!S_ISREG(inode->i_mode))
637 return -XFS_ERROR(EINVAL);
638
639 error = mnt_want_write_file(filp);
640 if (error)
641 return error;
642
643 xfs_ilock(ip, XFS_IOLOCK_EXCL);
644
645 switch (bf->l_whence) {
646 case 0: /*SEEK_SET*/
647 break;
648 case 1: /*SEEK_CUR*/
649 bf->l_start += filp->f_pos;
650 break;
651 case 2: /*SEEK_END*/
652 bf->l_start += XFS_ISIZE(ip);
653 break;
654 default:
655 error = XFS_ERROR(EINVAL);
656 goto out_unlock;
657 }
658
659 /*
660 * length of <= 0 for resv/unresv/zero is invalid. length for
661 * alloc/free is ignored completely and we have no idea what userspace
662 * might have set it to, so set it to zero to allow range
663 * checks to pass.
664 */
665 switch (cmd) {
666 case XFS_IOC_ZERO_RANGE:
667 case XFS_IOC_RESVSP:
668 case XFS_IOC_RESVSP64:
669 case XFS_IOC_UNRESVSP:
670 case XFS_IOC_UNRESVSP64:
671 if (bf->l_len <= 0) {
672 error = XFS_ERROR(EINVAL);
673 goto out_unlock;
674 }
675 break;
676 default:
677 bf->l_len = 0;
678 break;
679 }
680
681 if (bf->l_start < 0 ||
682 bf->l_start > mp->m_super->s_maxbytes ||
683 bf->l_start + bf->l_len < 0 ||
684 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
685 error = XFS_ERROR(EINVAL);
686 goto out_unlock;
687 }
688
689 switch (cmd) {
690 case XFS_IOC_ZERO_RANGE:
691 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
692 if (!error)
693 setprealloc = true;
694 break;
695 case XFS_IOC_RESVSP:
696 case XFS_IOC_RESVSP64:
697 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
698 XFS_BMAPI_PREALLOC);
699 if (!error)
700 setprealloc = true;
701 break;
702 case XFS_IOC_UNRESVSP:
703 case XFS_IOC_UNRESVSP64:
704 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
705 break;
706 case XFS_IOC_ALLOCSP:
707 case XFS_IOC_ALLOCSP64:
708 case XFS_IOC_FREESP:
709 case XFS_IOC_FREESP64:
710 if (bf->l_start > XFS_ISIZE(ip)) {
711 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
712 bf->l_start - XFS_ISIZE(ip), 0);
713 if (error)
714 goto out_unlock;
715 }
716
717 iattr.ia_valid = ATTR_SIZE;
718 iattr.ia_size = bf->l_start;
719
720 error = xfs_setattr_size(ip, &iattr);
721 if (!error)
722 clrprealloc = true;
723 break;
724 default:
725 ASSERT(0);
726 error = XFS_ERROR(EINVAL);
727 }
728
729 if (error)
730 goto out_unlock;
731
732 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
733 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
734 if (error) {
735 xfs_trans_cancel(tp, 0);
736 goto out_unlock;
737 }
738
739 xfs_ilock(ip, XFS_ILOCK_EXCL);
740 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
741
742 if (!(ioflags & IO_INVIS)) {
743 ip->i_d.di_mode &= ~S_ISUID;
744 if (ip->i_d.di_mode & S_IXGRP)
745 ip->i_d.di_mode &= ~S_ISGID;
746 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
747 }
748
749 if (setprealloc)
750 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
751 else if (clrprealloc)
752 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
753
754 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
755 if (filp->f_flags & O_DSYNC)
756 xfs_trans_set_sync(tp);
757 error = xfs_trans_commit(tp, 0);
758
759 out_unlock:
760 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
761 mnt_drop_write_file(filp);
762 return -error;
763 }
764
765 STATIC int
766 xfs_ioc_bulkstat(
767 xfs_mount_t *mp,
768 unsigned int cmd,
769 void __user *arg)
770 {
771 xfs_fsop_bulkreq_t bulkreq;
772 int count; /* # of records returned */
773 xfs_ino_t inlast; /* last inode number */
774 int done;
775 int error;
776
777 /* done = 1 if there are more stats to get and if bulkstat */
778 /* should be called again (unused here, but used in dmapi) */
779
780 if (!capable(CAP_SYS_ADMIN))
781 return -EPERM;
782
783 if (XFS_FORCED_SHUTDOWN(mp))
784 return -XFS_ERROR(EIO);
785
786 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
787 return -XFS_ERROR(EFAULT);
788
789 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
790 return -XFS_ERROR(EFAULT);
791
792 if ((count = bulkreq.icount) <= 0)
793 return -XFS_ERROR(EINVAL);
794
795 if (bulkreq.ubuffer == NULL)
796 return -XFS_ERROR(EINVAL);
797
798 if (cmd == XFS_IOC_FSINUMBERS)
799 error = xfs_inumbers(mp, &inlast, &count,
800 bulkreq.ubuffer, xfs_inumbers_fmt);
801 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
802 error = xfs_bulkstat_single(mp, &inlast,
803 bulkreq.ubuffer, &done);
804 else /* XFS_IOC_FSBULKSTAT */
805 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
806 sizeof(xfs_bstat_t), bulkreq.ubuffer,
807 &done);
808
809 if (error)
810 return -error;
811
812 if (bulkreq.ocount != NULL) {
813 if (copy_to_user(bulkreq.lastip, &inlast,
814 sizeof(xfs_ino_t)))
815 return -XFS_ERROR(EFAULT);
816
817 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
818 return -XFS_ERROR(EFAULT);
819 }
820
821 return 0;
822 }
823
824 STATIC int
825 xfs_ioc_fsgeometry_v1(
826 xfs_mount_t *mp,
827 void __user *arg)
828 {
829 xfs_fsop_geom_t fsgeo;
830 int error;
831
832 error = xfs_fs_geometry(mp, &fsgeo, 3);
833 if (error)
834 return -error;
835
836 /*
837 * Caller should have passed an argument of type
838 * xfs_fsop_geom_v1_t. This is a proper subset of the
839 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
840 */
841 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
842 return -XFS_ERROR(EFAULT);
843 return 0;
844 }
845
846 STATIC int
847 xfs_ioc_fsgeometry(
848 xfs_mount_t *mp,
849 void __user *arg)
850 {
851 xfs_fsop_geom_t fsgeo;
852 int error;
853
854 error = xfs_fs_geometry(mp, &fsgeo, 4);
855 if (error)
856 return -error;
857
858 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
859 return -XFS_ERROR(EFAULT);
860 return 0;
861 }
862
863 /*
864 * Linux extended inode flags interface.
865 */
866
867 STATIC unsigned int
868 xfs_merge_ioc_xflags(
869 unsigned int flags,
870 unsigned int start)
871 {
872 unsigned int xflags = start;
873
874 if (flags & FS_IMMUTABLE_FL)
875 xflags |= XFS_XFLAG_IMMUTABLE;
876 else
877 xflags &= ~XFS_XFLAG_IMMUTABLE;
878 if (flags & FS_APPEND_FL)
879 xflags |= XFS_XFLAG_APPEND;
880 else
881 xflags &= ~XFS_XFLAG_APPEND;
882 if (flags & FS_SYNC_FL)
883 xflags |= XFS_XFLAG_SYNC;
884 else
885 xflags &= ~XFS_XFLAG_SYNC;
886 if (flags & FS_NOATIME_FL)
887 xflags |= XFS_XFLAG_NOATIME;
888 else
889 xflags &= ~XFS_XFLAG_NOATIME;
890 if (flags & FS_NODUMP_FL)
891 xflags |= XFS_XFLAG_NODUMP;
892 else
893 xflags &= ~XFS_XFLAG_NODUMP;
894
895 return xflags;
896 }
897
898 STATIC unsigned int
899 xfs_di2lxflags(
900 __uint16_t di_flags)
901 {
902 unsigned int flags = 0;
903
904 if (di_flags & XFS_DIFLAG_IMMUTABLE)
905 flags |= FS_IMMUTABLE_FL;
906 if (di_flags & XFS_DIFLAG_APPEND)
907 flags |= FS_APPEND_FL;
908 if (di_flags & XFS_DIFLAG_SYNC)
909 flags |= FS_SYNC_FL;
910 if (di_flags & XFS_DIFLAG_NOATIME)
911 flags |= FS_NOATIME_FL;
912 if (di_flags & XFS_DIFLAG_NODUMP)
913 flags |= FS_NODUMP_FL;
914 return flags;
915 }
916
917 STATIC int
918 xfs_ioc_fsgetxattr(
919 xfs_inode_t *ip,
920 int attr,
921 void __user *arg)
922 {
923 struct fsxattr fa;
924
925 memset(&fa, 0, sizeof(struct fsxattr));
926
927 xfs_ilock(ip, XFS_ILOCK_SHARED);
928 fa.fsx_xflags = xfs_ip2xflags(ip);
929 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
930 fa.fsx_projid = xfs_get_projid(ip);
931
932 if (attr) {
933 if (ip->i_afp) {
934 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
935 fa.fsx_nextents = ip->i_afp->if_bytes /
936 sizeof(xfs_bmbt_rec_t);
937 else
938 fa.fsx_nextents = ip->i_d.di_anextents;
939 } else
940 fa.fsx_nextents = 0;
941 } else {
942 if (ip->i_df.if_flags & XFS_IFEXTENTS)
943 fa.fsx_nextents = ip->i_df.if_bytes /
944 sizeof(xfs_bmbt_rec_t);
945 else
946 fa.fsx_nextents = ip->i_d.di_nextents;
947 }
948 xfs_iunlock(ip, XFS_ILOCK_SHARED);
949
950 if (copy_to_user(arg, &fa, sizeof(fa)))
951 return -EFAULT;
952 return 0;
953 }
954
955 STATIC void
956 xfs_set_diflags(
957 struct xfs_inode *ip,
958 unsigned int xflags)
959 {
960 unsigned int di_flags;
961
962 /* can't set PREALLOC this way, just preserve it */
963 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
964 if (xflags & XFS_XFLAG_IMMUTABLE)
965 di_flags |= XFS_DIFLAG_IMMUTABLE;
966 if (xflags & XFS_XFLAG_APPEND)
967 di_flags |= XFS_DIFLAG_APPEND;
968 if (xflags & XFS_XFLAG_SYNC)
969 di_flags |= XFS_DIFLAG_SYNC;
970 if (xflags & XFS_XFLAG_NOATIME)
971 di_flags |= XFS_DIFLAG_NOATIME;
972 if (xflags & XFS_XFLAG_NODUMP)
973 di_flags |= XFS_DIFLAG_NODUMP;
974 if (xflags & XFS_XFLAG_PROJINHERIT)
975 di_flags |= XFS_DIFLAG_PROJINHERIT;
976 if (xflags & XFS_XFLAG_NODEFRAG)
977 di_flags |= XFS_DIFLAG_NODEFRAG;
978 if (xflags & XFS_XFLAG_FILESTREAM)
979 di_flags |= XFS_DIFLAG_FILESTREAM;
980 if (S_ISDIR(ip->i_d.di_mode)) {
981 if (xflags & XFS_XFLAG_RTINHERIT)
982 di_flags |= XFS_DIFLAG_RTINHERIT;
983 if (xflags & XFS_XFLAG_NOSYMLINKS)
984 di_flags |= XFS_DIFLAG_NOSYMLINKS;
985 if (xflags & XFS_XFLAG_EXTSZINHERIT)
986 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
987 } else if (S_ISREG(ip->i_d.di_mode)) {
988 if (xflags & XFS_XFLAG_REALTIME)
989 di_flags |= XFS_DIFLAG_REALTIME;
990 if (xflags & XFS_XFLAG_EXTSIZE)
991 di_flags |= XFS_DIFLAG_EXTSIZE;
992 }
993
994 ip->i_d.di_flags = di_flags;
995 }
996
997 STATIC void
998 xfs_diflags_to_linux(
999 struct xfs_inode *ip)
1000 {
1001 struct inode *inode = VFS_I(ip);
1002 unsigned int xflags = xfs_ip2xflags(ip);
1003
1004 if (xflags & XFS_XFLAG_IMMUTABLE)
1005 inode->i_flags |= S_IMMUTABLE;
1006 else
1007 inode->i_flags &= ~S_IMMUTABLE;
1008 if (xflags & XFS_XFLAG_APPEND)
1009 inode->i_flags |= S_APPEND;
1010 else
1011 inode->i_flags &= ~S_APPEND;
1012 if (xflags & XFS_XFLAG_SYNC)
1013 inode->i_flags |= S_SYNC;
1014 else
1015 inode->i_flags &= ~S_SYNC;
1016 if (xflags & XFS_XFLAG_NOATIME)
1017 inode->i_flags |= S_NOATIME;
1018 else
1019 inode->i_flags &= ~S_NOATIME;
1020 }
1021
1022 #define FSX_PROJID 1
1023 #define FSX_EXTSIZE 2
1024 #define FSX_XFLAGS 4
1025 #define FSX_NONBLOCK 8
1026
1027 STATIC int
1028 xfs_ioctl_setattr(
1029 xfs_inode_t *ip,
1030 struct fsxattr *fa,
1031 int mask)
1032 {
1033 struct xfs_mount *mp = ip->i_mount;
1034 struct xfs_trans *tp;
1035 unsigned int lock_flags = 0;
1036 struct xfs_dquot *udqp = NULL;
1037 struct xfs_dquot *pdqp = NULL;
1038 struct xfs_dquot *olddquot = NULL;
1039 int code;
1040
1041 trace_xfs_ioctl_setattr(ip);
1042
1043 if (mp->m_flags & XFS_MOUNT_RDONLY)
1044 return XFS_ERROR(EROFS);
1045 if (XFS_FORCED_SHUTDOWN(mp))
1046 return XFS_ERROR(EIO);
1047
1048 /*
1049 * Disallow 32bit project ids when projid32bit feature is not enabled.
1050 */
1051 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
1052 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1053 return XFS_ERROR(EINVAL);
1054
1055 /*
1056 * If disk quotas is on, we make sure that the dquots do exist on disk,
1057 * before we start any other transactions. Trying to do this later
1058 * is messy. We don't care to take a readlock to look at the ids
1059 * in inode here, because we can't hold it across the trans_reserve.
1060 * If the IDs do change before we take the ilock, we're covered
1061 * because the i_*dquot fields will get updated anyway.
1062 */
1063 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
1064 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1065 ip->i_d.di_gid, fa->fsx_projid,
1066 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1067 if (code)
1068 return code;
1069 }
1070
1071 /*
1072 * For the other attributes, we acquire the inode lock and
1073 * first do an error checking pass.
1074 */
1075 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1076 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1077 if (code)
1078 goto error_return;
1079
1080 lock_flags = XFS_ILOCK_EXCL;
1081 xfs_ilock(ip, lock_flags);
1082
1083 /*
1084 * CAP_FOWNER overrides the following restrictions:
1085 *
1086 * The user ID of the calling process must be equal
1087 * to the file owner ID, except in cases where the
1088 * CAP_FSETID capability is applicable.
1089 */
1090 if (!inode_owner_or_capable(VFS_I(ip))) {
1091 code = XFS_ERROR(EPERM);
1092 goto error_return;
1093 }
1094
1095 /*
1096 * Do a quota reservation only if projid is actually going to change.
1097 * Only allow changing of projid from init_user_ns since it is a
1098 * non user namespace aware identifier.
1099 */
1100 if (mask & FSX_PROJID) {
1101 if (current_user_ns() != &init_user_ns) {
1102 code = XFS_ERROR(EINVAL);
1103 goto error_return;
1104 }
1105
1106 if (XFS_IS_QUOTA_RUNNING(mp) &&
1107 XFS_IS_PQUOTA_ON(mp) &&
1108 xfs_get_projid(ip) != fa->fsx_projid) {
1109 ASSERT(tp);
1110 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1111 pdqp, capable(CAP_FOWNER) ?
1112 XFS_QMOPT_FORCE_RES : 0);
1113 if (code) /* out of quota */
1114 goto error_return;
1115 }
1116 }
1117
1118 if (mask & FSX_EXTSIZE) {
1119 /*
1120 * Can't change extent size if any extents are allocated.
1121 */
1122 if (ip->i_d.di_nextents &&
1123 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1124 fa->fsx_extsize)) {
1125 code = XFS_ERROR(EINVAL); /* EFBIG? */
1126 goto error_return;
1127 }
1128
1129 /*
1130 * Extent size must be a multiple of the appropriate block
1131 * size, if set at all. It must also be smaller than the
1132 * maximum extent size supported by the filesystem.
1133 *
1134 * Also, for non-realtime files, limit the extent size hint to
1135 * half the size of the AGs in the filesystem so alignment
1136 * doesn't result in extents larger than an AG.
1137 */
1138 if (fa->fsx_extsize != 0) {
1139 xfs_extlen_t size;
1140 xfs_fsblock_t extsize_fsb;
1141
1142 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1143 if (extsize_fsb > MAXEXTLEN) {
1144 code = XFS_ERROR(EINVAL);
1145 goto error_return;
1146 }
1147
1148 if (XFS_IS_REALTIME_INODE(ip) ||
1149 ((mask & FSX_XFLAGS) &&
1150 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1151 size = mp->m_sb.sb_rextsize <<
1152 mp->m_sb.sb_blocklog;
1153 } else {
1154 size = mp->m_sb.sb_blocksize;
1155 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1156 code = XFS_ERROR(EINVAL);
1157 goto error_return;
1158 }
1159 }
1160
1161 if (fa->fsx_extsize % size) {
1162 code = XFS_ERROR(EINVAL);
1163 goto error_return;
1164 }
1165 }
1166 }
1167
1168
1169 if (mask & FSX_XFLAGS) {
1170 /*
1171 * Can't change realtime flag if any extents are allocated.
1172 */
1173 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1174 (XFS_IS_REALTIME_INODE(ip)) !=
1175 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1176 code = XFS_ERROR(EINVAL); /* EFBIG? */
1177 goto error_return;
1178 }
1179
1180 /*
1181 * If realtime flag is set then must have realtime data.
1182 */
1183 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1184 if ((mp->m_sb.sb_rblocks == 0) ||
1185 (mp->m_sb.sb_rextsize == 0) ||
1186 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1187 code = XFS_ERROR(EINVAL);
1188 goto error_return;
1189 }
1190 }
1191
1192 /*
1193 * Can't modify an immutable/append-only file unless
1194 * we have appropriate permission.
1195 */
1196 if ((ip->i_d.di_flags &
1197 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1198 (fa->fsx_xflags &
1199 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1200 !capable(CAP_LINUX_IMMUTABLE)) {
1201 code = XFS_ERROR(EPERM);
1202 goto error_return;
1203 }
1204 }
1205
1206 xfs_trans_ijoin(tp, ip, 0);
1207
1208 /*
1209 * Change file ownership. Must be the owner or privileged.
1210 */
1211 if (mask & FSX_PROJID) {
1212 /*
1213 * CAP_FSETID overrides the following restrictions:
1214 *
1215 * The set-user-ID and set-group-ID bits of a file will be
1216 * cleared upon successful return from chown()
1217 */
1218 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1219 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1220 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1221
1222 /*
1223 * Change the ownerships and register quota modifications
1224 * in the transaction.
1225 */
1226 if (xfs_get_projid(ip) != fa->fsx_projid) {
1227 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1228 olddquot = xfs_qm_vop_chown(tp, ip,
1229 &ip->i_pdquot, pdqp);
1230 }
1231 ASSERT(ip->i_d.di_version > 1);
1232 xfs_set_projid(ip, fa->fsx_projid);
1233 }
1234
1235 }
1236
1237 if (mask & FSX_EXTSIZE)
1238 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1239 if (mask & FSX_XFLAGS) {
1240 xfs_set_diflags(ip, fa->fsx_xflags);
1241 xfs_diflags_to_linux(ip);
1242 }
1243
1244 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1245 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1246
1247 XFS_STATS_INC(xs_ig_attrchg);
1248
1249 /*
1250 * If this is a synchronous mount, make sure that the
1251 * transaction goes to disk before returning to the user.
1252 * This is slightly sub-optimal in that truncates require
1253 * two sync transactions instead of one for wsync filesystems.
1254 * One for the truncate and one for the timestamps since we
1255 * don't want to change the timestamps unless we're sure the
1256 * truncate worked. Truncates are less than 1% of the laddis
1257 * mix so this probably isn't worth the trouble to optimize.
1258 */
1259 if (mp->m_flags & XFS_MOUNT_WSYNC)
1260 xfs_trans_set_sync(tp);
1261 code = xfs_trans_commit(tp, 0);
1262 xfs_iunlock(ip, lock_flags);
1263
1264 /*
1265 * Release any dquot(s) the inode had kept before chown.
1266 */
1267 xfs_qm_dqrele(olddquot);
1268 xfs_qm_dqrele(udqp);
1269 xfs_qm_dqrele(pdqp);
1270
1271 return code;
1272
1273 error_return:
1274 xfs_qm_dqrele(udqp);
1275 xfs_qm_dqrele(pdqp);
1276 xfs_trans_cancel(tp, 0);
1277 if (lock_flags)
1278 xfs_iunlock(ip, lock_flags);
1279 return code;
1280 }
1281
1282 STATIC int
1283 xfs_ioc_fssetxattr(
1284 xfs_inode_t *ip,
1285 struct file *filp,
1286 void __user *arg)
1287 {
1288 struct fsxattr fa;
1289 unsigned int mask;
1290 int error;
1291
1292 if (copy_from_user(&fa, arg, sizeof(fa)))
1293 return -EFAULT;
1294
1295 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1296 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1297 mask |= FSX_NONBLOCK;
1298
1299 error = mnt_want_write_file(filp);
1300 if (error)
1301 return error;
1302 error = xfs_ioctl_setattr(ip, &fa, mask);
1303 mnt_drop_write_file(filp);
1304 return -error;
1305 }
1306
1307 STATIC int
1308 xfs_ioc_getxflags(
1309 xfs_inode_t *ip,
1310 void __user *arg)
1311 {
1312 unsigned int flags;
1313
1314 flags = xfs_di2lxflags(ip->i_d.di_flags);
1315 if (copy_to_user(arg, &flags, sizeof(flags)))
1316 return -EFAULT;
1317 return 0;
1318 }
1319
1320 STATIC int
1321 xfs_ioc_setxflags(
1322 xfs_inode_t *ip,
1323 struct file *filp,
1324 void __user *arg)
1325 {
1326 struct fsxattr fa;
1327 unsigned int flags;
1328 unsigned int mask;
1329 int error;
1330
1331 if (copy_from_user(&flags, arg, sizeof(flags)))
1332 return -EFAULT;
1333
1334 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1335 FS_NOATIME_FL | FS_NODUMP_FL | \
1336 FS_SYNC_FL))
1337 return -EOPNOTSUPP;
1338
1339 mask = FSX_XFLAGS;
1340 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1341 mask |= FSX_NONBLOCK;
1342 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1343
1344 error = mnt_want_write_file(filp);
1345 if (error)
1346 return error;
1347 error = xfs_ioctl_setattr(ip, &fa, mask);
1348 mnt_drop_write_file(filp);
1349 return -error;
1350 }
1351
1352 STATIC int
1353 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1354 {
1355 struct getbmap __user *base = *ap;
1356
1357 /* copy only getbmap portion (not getbmapx) */
1358 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1359 return XFS_ERROR(EFAULT);
1360
1361 *ap += sizeof(struct getbmap);
1362 return 0;
1363 }
1364
1365 STATIC int
1366 xfs_ioc_getbmap(
1367 struct xfs_inode *ip,
1368 int ioflags,
1369 unsigned int cmd,
1370 void __user *arg)
1371 {
1372 struct getbmapx bmx;
1373 int error;
1374
1375 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1376 return -XFS_ERROR(EFAULT);
1377
1378 if (bmx.bmv_count < 2)
1379 return -XFS_ERROR(EINVAL);
1380
1381 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1382 if (ioflags & IO_INVIS)
1383 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1384
1385 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1386 (struct getbmap *)arg+1);
1387 if (error)
1388 return -error;
1389
1390 /* copy back header - only size of getbmap */
1391 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1392 return -XFS_ERROR(EFAULT);
1393 return 0;
1394 }
1395
1396 STATIC int
1397 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1398 {
1399 struct getbmapx __user *base = *ap;
1400
1401 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1402 return XFS_ERROR(EFAULT);
1403
1404 *ap += sizeof(struct getbmapx);
1405 return 0;
1406 }
1407
1408 STATIC int
1409 xfs_ioc_getbmapx(
1410 struct xfs_inode *ip,
1411 void __user *arg)
1412 {
1413 struct getbmapx bmx;
1414 int error;
1415
1416 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1417 return -XFS_ERROR(EFAULT);
1418
1419 if (bmx.bmv_count < 2)
1420 return -XFS_ERROR(EINVAL);
1421
1422 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1423 return -XFS_ERROR(EINVAL);
1424
1425 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1426 (struct getbmapx *)arg+1);
1427 if (error)
1428 return -error;
1429
1430 /* copy back header */
1431 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1432 return -XFS_ERROR(EFAULT);
1433
1434 return 0;
1435 }
1436
1437 int
1438 xfs_ioc_swapext(
1439 xfs_swapext_t *sxp)
1440 {
1441 xfs_inode_t *ip, *tip;
1442 struct fd f, tmp;
1443 int error = 0;
1444
1445 /* Pull information for the target fd */
1446 f = fdget((int)sxp->sx_fdtarget);
1447 if (!f.file) {
1448 error = XFS_ERROR(EINVAL);
1449 goto out;
1450 }
1451
1452 if (!(f.file->f_mode & FMODE_WRITE) ||
1453 !(f.file->f_mode & FMODE_READ) ||
1454 (f.file->f_flags & O_APPEND)) {
1455 error = XFS_ERROR(EBADF);
1456 goto out_put_file;
1457 }
1458
1459 tmp = fdget((int)sxp->sx_fdtmp);
1460 if (!tmp.file) {
1461 error = XFS_ERROR(EINVAL);
1462 goto out_put_file;
1463 }
1464
1465 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1466 !(tmp.file->f_mode & FMODE_READ) ||
1467 (tmp.file->f_flags & O_APPEND)) {
1468 error = XFS_ERROR(EBADF);
1469 goto out_put_tmp_file;
1470 }
1471
1472 if (IS_SWAPFILE(file_inode(f.file)) ||
1473 IS_SWAPFILE(file_inode(tmp.file))) {
1474 error = XFS_ERROR(EINVAL);
1475 goto out_put_tmp_file;
1476 }
1477
1478 ip = XFS_I(file_inode(f.file));
1479 tip = XFS_I(file_inode(tmp.file));
1480
1481 if (ip->i_mount != tip->i_mount) {
1482 error = XFS_ERROR(EINVAL);
1483 goto out_put_tmp_file;
1484 }
1485
1486 if (ip->i_ino == tip->i_ino) {
1487 error = XFS_ERROR(EINVAL);
1488 goto out_put_tmp_file;
1489 }
1490
1491 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1492 error = XFS_ERROR(EIO);
1493 goto out_put_tmp_file;
1494 }
1495
1496 error = xfs_swap_extents(ip, tip, sxp);
1497
1498 out_put_tmp_file:
1499 fdput(tmp);
1500 out_put_file:
1501 fdput(f);
1502 out:
1503 return error;
1504 }
1505
1506 /*
1507 * Note: some of the ioctl's return positive numbers as a
1508 * byte count indicating success, such as readlink_by_handle.
1509 * So we don't "sign flip" like most other routines. This means
1510 * true errors need to be returned as a negative value.
1511 */
1512 long
1513 xfs_file_ioctl(
1514 struct file *filp,
1515 unsigned int cmd,
1516 unsigned long p)
1517 {
1518 struct inode *inode = file_inode(filp);
1519 struct xfs_inode *ip = XFS_I(inode);
1520 struct xfs_mount *mp = ip->i_mount;
1521 void __user *arg = (void __user *)p;
1522 int ioflags = 0;
1523 int error;
1524
1525 if (filp->f_mode & FMODE_NOCMTIME)
1526 ioflags |= IO_INVIS;
1527
1528 trace_xfs_file_ioctl(ip);
1529
1530 switch (cmd) {
1531 case FITRIM:
1532 return xfs_ioc_trim(mp, arg);
1533 case XFS_IOC_ALLOCSP:
1534 case XFS_IOC_FREESP:
1535 case XFS_IOC_RESVSP:
1536 case XFS_IOC_UNRESVSP:
1537 case XFS_IOC_ALLOCSP64:
1538 case XFS_IOC_FREESP64:
1539 case XFS_IOC_RESVSP64:
1540 case XFS_IOC_UNRESVSP64:
1541 case XFS_IOC_ZERO_RANGE: {
1542 xfs_flock64_t bf;
1543
1544 if (copy_from_user(&bf, arg, sizeof(bf)))
1545 return -XFS_ERROR(EFAULT);
1546 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1547 }
1548 case XFS_IOC_DIOINFO: {
1549 struct dioattr da;
1550 xfs_buftarg_t *target =
1551 XFS_IS_REALTIME_INODE(ip) ?
1552 mp->m_rtdev_targp : mp->m_ddev_targp;
1553
1554 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1555 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1556
1557 if (copy_to_user(arg, &da, sizeof(da)))
1558 return -XFS_ERROR(EFAULT);
1559 return 0;
1560 }
1561
1562 case XFS_IOC_FSBULKSTAT_SINGLE:
1563 case XFS_IOC_FSBULKSTAT:
1564 case XFS_IOC_FSINUMBERS:
1565 return xfs_ioc_bulkstat(mp, cmd, arg);
1566
1567 case XFS_IOC_FSGEOMETRY_V1:
1568 return xfs_ioc_fsgeometry_v1(mp, arg);
1569
1570 case XFS_IOC_FSGEOMETRY:
1571 return xfs_ioc_fsgeometry(mp, arg);
1572
1573 case XFS_IOC_GETVERSION:
1574 return put_user(inode->i_generation, (int __user *)arg);
1575
1576 case XFS_IOC_FSGETXATTR:
1577 return xfs_ioc_fsgetxattr(ip, 0, arg);
1578 case XFS_IOC_FSGETXATTRA:
1579 return xfs_ioc_fsgetxattr(ip, 1, arg);
1580 case XFS_IOC_FSSETXATTR:
1581 return xfs_ioc_fssetxattr(ip, filp, arg);
1582 case XFS_IOC_GETXFLAGS:
1583 return xfs_ioc_getxflags(ip, arg);
1584 case XFS_IOC_SETXFLAGS:
1585 return xfs_ioc_setxflags(ip, filp, arg);
1586
1587 case XFS_IOC_FSSETDM: {
1588 struct fsdmidata dmi;
1589
1590 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1591 return -XFS_ERROR(EFAULT);
1592
1593 error = mnt_want_write_file(filp);
1594 if (error)
1595 return error;
1596
1597 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1598 dmi.fsd_dmstate);
1599 mnt_drop_write_file(filp);
1600 return -error;
1601 }
1602
1603 case XFS_IOC_GETBMAP:
1604 case XFS_IOC_GETBMAPA:
1605 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1606
1607 case XFS_IOC_GETBMAPX:
1608 return xfs_ioc_getbmapx(ip, arg);
1609
1610 case XFS_IOC_FD_TO_HANDLE:
1611 case XFS_IOC_PATH_TO_HANDLE:
1612 case XFS_IOC_PATH_TO_FSHANDLE: {
1613 xfs_fsop_handlereq_t hreq;
1614
1615 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1616 return -XFS_ERROR(EFAULT);
1617 return xfs_find_handle(cmd, &hreq);
1618 }
1619 case XFS_IOC_OPEN_BY_HANDLE: {
1620 xfs_fsop_handlereq_t hreq;
1621
1622 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1623 return -XFS_ERROR(EFAULT);
1624 return xfs_open_by_handle(filp, &hreq);
1625 }
1626 case XFS_IOC_FSSETDM_BY_HANDLE:
1627 return xfs_fssetdm_by_handle(filp, arg);
1628
1629 case XFS_IOC_READLINK_BY_HANDLE: {
1630 xfs_fsop_handlereq_t hreq;
1631
1632 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1633 return -XFS_ERROR(EFAULT);
1634 return xfs_readlink_by_handle(filp, &hreq);
1635 }
1636 case XFS_IOC_ATTRLIST_BY_HANDLE:
1637 return xfs_attrlist_by_handle(filp, arg);
1638
1639 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1640 return xfs_attrmulti_by_handle(filp, arg);
1641
1642 case XFS_IOC_SWAPEXT: {
1643 struct xfs_swapext sxp;
1644
1645 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1646 return -XFS_ERROR(EFAULT);
1647 error = mnt_want_write_file(filp);
1648 if (error)
1649 return error;
1650 error = xfs_ioc_swapext(&sxp);
1651 mnt_drop_write_file(filp);
1652 return -error;
1653 }
1654
1655 case XFS_IOC_FSCOUNTS: {
1656 xfs_fsop_counts_t out;
1657
1658 error = xfs_fs_counts(mp, &out);
1659 if (error)
1660 return -error;
1661
1662 if (copy_to_user(arg, &out, sizeof(out)))
1663 return -XFS_ERROR(EFAULT);
1664 return 0;
1665 }
1666
1667 case XFS_IOC_SET_RESBLKS: {
1668 xfs_fsop_resblks_t inout;
1669 __uint64_t in;
1670
1671 if (!capable(CAP_SYS_ADMIN))
1672 return -EPERM;
1673
1674 if (mp->m_flags & XFS_MOUNT_RDONLY)
1675 return -XFS_ERROR(EROFS);
1676
1677 if (copy_from_user(&inout, arg, sizeof(inout)))
1678 return -XFS_ERROR(EFAULT);
1679
1680 error = mnt_want_write_file(filp);
1681 if (error)
1682 return error;
1683
1684 /* input parameter is passed in resblks field of structure */
1685 in = inout.resblks;
1686 error = xfs_reserve_blocks(mp, &in, &inout);
1687 mnt_drop_write_file(filp);
1688 if (error)
1689 return -error;
1690
1691 if (copy_to_user(arg, &inout, sizeof(inout)))
1692 return -XFS_ERROR(EFAULT);
1693 return 0;
1694 }
1695
1696 case XFS_IOC_GET_RESBLKS: {
1697 xfs_fsop_resblks_t out;
1698
1699 if (!capable(CAP_SYS_ADMIN))
1700 return -EPERM;
1701
1702 error = xfs_reserve_blocks(mp, NULL, &out);
1703 if (error)
1704 return -error;
1705
1706 if (copy_to_user(arg, &out, sizeof(out)))
1707 return -XFS_ERROR(EFAULT);
1708
1709 return 0;
1710 }
1711
1712 case XFS_IOC_FSGROWFSDATA: {
1713 xfs_growfs_data_t in;
1714
1715 if (copy_from_user(&in, arg, sizeof(in)))
1716 return -XFS_ERROR(EFAULT);
1717
1718 error = mnt_want_write_file(filp);
1719 if (error)
1720 return error;
1721 error = xfs_growfs_data(mp, &in);
1722 mnt_drop_write_file(filp);
1723 return -error;
1724 }
1725
1726 case XFS_IOC_FSGROWFSLOG: {
1727 xfs_growfs_log_t in;
1728
1729 if (copy_from_user(&in, arg, sizeof(in)))
1730 return -XFS_ERROR(EFAULT);
1731
1732 error = mnt_want_write_file(filp);
1733 if (error)
1734 return error;
1735 error = xfs_growfs_log(mp, &in);
1736 mnt_drop_write_file(filp);
1737 return -error;
1738 }
1739
1740 case XFS_IOC_FSGROWFSRT: {
1741 xfs_growfs_rt_t in;
1742
1743 if (copy_from_user(&in, arg, sizeof(in)))
1744 return -XFS_ERROR(EFAULT);
1745
1746 error = mnt_want_write_file(filp);
1747 if (error)
1748 return error;
1749 error = xfs_growfs_rt(mp, &in);
1750 mnt_drop_write_file(filp);
1751 return -error;
1752 }
1753
1754 case XFS_IOC_GOINGDOWN: {
1755 __uint32_t in;
1756
1757 if (!capable(CAP_SYS_ADMIN))
1758 return -EPERM;
1759
1760 if (get_user(in, (__uint32_t __user *)arg))
1761 return -XFS_ERROR(EFAULT);
1762
1763 error = xfs_fs_goingdown(mp, in);
1764 return -error;
1765 }
1766
1767 case XFS_IOC_ERROR_INJECTION: {
1768 xfs_error_injection_t in;
1769
1770 if (!capable(CAP_SYS_ADMIN))
1771 return -EPERM;
1772
1773 if (copy_from_user(&in, arg, sizeof(in)))
1774 return -XFS_ERROR(EFAULT);
1775
1776 error = xfs_errortag_add(in.errtag, mp);
1777 return -error;
1778 }
1779
1780 case XFS_IOC_ERROR_CLEARALL:
1781 if (!capable(CAP_SYS_ADMIN))
1782 return -EPERM;
1783
1784 error = xfs_errortag_clearall(mp, 1);
1785 return -error;
1786
1787 case XFS_IOC_FREE_EOFBLOCKS: {
1788 struct xfs_fs_eofblocks eofb;
1789 struct xfs_eofblocks keofb;
1790
1791 if (!capable(CAP_SYS_ADMIN))
1792 return -EPERM;
1793
1794 if (mp->m_flags & XFS_MOUNT_RDONLY)
1795 return -XFS_ERROR(EROFS);
1796
1797 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1798 return -XFS_ERROR(EFAULT);
1799
1800 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1801 if (error)
1802 return -error;
1803
1804 return -xfs_icache_free_eofblocks(mp, &keofb);
1805 }
1806
1807 default:
1808 return -ENOTTY;
1809 }
1810 }
Linux with added FPC-III support