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PM / clk: Add support for adding a specific clock from device-tree
[deliverable/linux.git] / fs / xfs / 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_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_inode.h"
26 #include "xfs_ioctl.h"
27 #include "xfs_alloc.h"
28 #include "xfs_rtalloc.h"
29 #include "xfs_itable.h"
30 #include "xfs_error.h"
31 #include "xfs_attr.h"
32 #include "xfs_bmap.h"
33 #include "xfs_bmap_util.h"
34 #include "xfs_fsops.h"
35 #include "xfs_discard.h"
36 #include "xfs_quota.h"
37 #include "xfs_export.h"
38 #include "xfs_trace.h"
39 #include "xfs_icache.h"
40 #include "xfs_symlink.h"
41 #include "xfs_trans.h"
42 #include "xfs_pnfs.h"
43 #include "xfs_acl.h"
44
45 #include <linux/capability.h>
46 #include <linux/dcache.h>
47 #include <linux/mount.h>
48 #include <linux/namei.h>
49 #include <linux/pagemap.h>
50 #include <linux/slab.h>
51 #include <linux/exportfs.h>
52
53 /*
54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
55 * a file or fs handle.
56 *
57 * XFS_IOC_PATH_TO_FSHANDLE
58 * returns fs handle for a mount point or path within that mount point
59 * XFS_IOC_FD_TO_HANDLE
60 * returns full handle for a FD opened in user space
61 * XFS_IOC_PATH_TO_HANDLE
62 * returns full handle for a path
63 */
64 int
65 xfs_find_handle(
66 unsigned int cmd,
67 xfs_fsop_handlereq_t *hreq)
68 {
69 int hsize;
70 xfs_handle_t handle;
71 struct inode *inode;
72 struct fd f = {NULL};
73 struct path path;
74 int error;
75 struct xfs_inode *ip;
76
77 if (cmd == XFS_IOC_FD_TO_HANDLE) {
78 f = fdget(hreq->fd);
79 if (!f.file)
80 return -EBADF;
81 inode = file_inode(f.file);
82 } else {
83 error = user_lpath((const char __user *)hreq->path, &path);
84 if (error)
85 return error;
86 inode = d_inode(path.dentry);
87 }
88 ip = XFS_I(inode);
89
90 /*
91 * We can only generate handles for inodes residing on a XFS filesystem,
92 * and only for regular files, directories or symbolic links.
93 */
94 error = -EINVAL;
95 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
96 goto out_put;
97
98 error = -EBADF;
99 if (!S_ISREG(inode->i_mode) &&
100 !S_ISDIR(inode->i_mode) &&
101 !S_ISLNK(inode->i_mode))
102 goto out_put;
103
104
105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
106
107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
108 /*
109 * This handle only contains an fsid, zero the rest.
110 */
111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
112 hsize = sizeof(xfs_fsid_t);
113 } else {
114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
115 sizeof(handle.ha_fid.fid_len);
116 handle.ha_fid.fid_pad = 0;
117 handle.ha_fid.fid_gen = inode->i_generation;
118 handle.ha_fid.fid_ino = ip->i_ino;
119
120 hsize = XFS_HSIZE(handle);
121 }
122
123 error = -EFAULT;
124 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
126 goto out_put;
127
128 error = 0;
129
130 out_put:
131 if (cmd == XFS_IOC_FD_TO_HANDLE)
132 fdput(f);
133 else
134 path_put(&path);
135 return error;
136 }
137
138 /*
139 * No need to do permission checks on the various pathname components
140 * as the handle operations are privileged.
141 */
142 STATIC int
143 xfs_handle_acceptable(
144 void *context,
145 struct dentry *dentry)
146 {
147 return 1;
148 }
149
150 /*
151 * Convert userspace handle data into a dentry.
152 */
153 struct dentry *
154 xfs_handle_to_dentry(
155 struct file *parfilp,
156 void __user *uhandle,
157 u32 hlen)
158 {
159 xfs_handle_t handle;
160 struct xfs_fid64 fid;
161
162 /*
163 * Only allow handle opens under a directory.
164 */
165 if (!S_ISDIR(file_inode(parfilp)->i_mode))
166 return ERR_PTR(-ENOTDIR);
167
168 if (hlen != sizeof(xfs_handle_t))
169 return ERR_PTR(-EINVAL);
170 if (copy_from_user(&handle, uhandle, hlen))
171 return ERR_PTR(-EFAULT);
172 if (handle.ha_fid.fid_len !=
173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
174 return ERR_PTR(-EINVAL);
175
176 memset(&fid, 0, sizeof(struct fid));
177 fid.ino = handle.ha_fid.fid_ino;
178 fid.gen = handle.ha_fid.fid_gen;
179
180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
182 xfs_handle_acceptable, NULL);
183 }
184
185 STATIC struct dentry *
186 xfs_handlereq_to_dentry(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
189 {
190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
191 }
192
193 int
194 xfs_open_by_handle(
195 struct file *parfilp,
196 xfs_fsop_handlereq_t *hreq)
197 {
198 const struct cred *cred = current_cred();
199 int error;
200 int fd;
201 int permflag;
202 struct file *filp;
203 struct inode *inode;
204 struct dentry *dentry;
205 fmode_t fmode;
206 struct path path;
207
208 if (!capable(CAP_SYS_ADMIN))
209 return -EPERM;
210
211 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
212 if (IS_ERR(dentry))
213 return PTR_ERR(dentry);
214 inode = d_inode(dentry);
215
216 /* Restrict xfs_open_by_handle to directories & regular files. */
217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
218 error = -EPERM;
219 goto out_dput;
220 }
221
222 #if BITS_PER_LONG != 32
223 hreq->oflags |= O_LARGEFILE;
224 #endif
225
226 permflag = hreq->oflags;
227 fmode = OPEN_FMODE(permflag);
228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
230 error = -EPERM;
231 goto out_dput;
232 }
233
234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
235 error = -EACCES;
236 goto out_dput;
237 }
238
239 /* Can't write directories. */
240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
241 error = -EISDIR;
242 goto out_dput;
243 }
244
245 fd = get_unused_fd_flags(0);
246 if (fd < 0) {
247 error = fd;
248 goto out_dput;
249 }
250
251 path.mnt = parfilp->f_path.mnt;
252 path.dentry = dentry;
253 filp = dentry_open(&path, hreq->oflags, cred);
254 dput(dentry);
255 if (IS_ERR(filp)) {
256 put_unused_fd(fd);
257 return PTR_ERR(filp);
258 }
259
260 if (S_ISREG(inode->i_mode)) {
261 filp->f_flags |= O_NOATIME;
262 filp->f_mode |= FMODE_NOCMTIME;
263 }
264
265 fd_install(fd, filp);
266 return fd;
267
268 out_dput:
269 dput(dentry);
270 return error;
271 }
272
273 int
274 xfs_readlink_by_handle(
275 struct file *parfilp,
276 xfs_fsop_handlereq_t *hreq)
277 {
278 struct dentry *dentry;
279 __u32 olen;
280 int error;
281
282 if (!capable(CAP_SYS_ADMIN))
283 return -EPERM;
284
285 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
286 if (IS_ERR(dentry))
287 return PTR_ERR(dentry);
288
289 /* Restrict this handle operation to symlinks only. */
290 if (!d_inode(dentry)->i_op->readlink) {
291 error = -EINVAL;
292 goto out_dput;
293 }
294
295 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
296 error = -EFAULT;
297 goto out_dput;
298 }
299
300 error = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen);
301
302 out_dput:
303 dput(dentry);
304 return error;
305 }
306
307 int
308 xfs_set_dmattrs(
309 xfs_inode_t *ip,
310 u_int evmask,
311 u_int16_t state)
312 {
313 xfs_mount_t *mp = ip->i_mount;
314 xfs_trans_t *tp;
315 int error;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -EPERM;
319
320 if (XFS_FORCED_SHUTDOWN(mp))
321 return -EIO;
322
323 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
324 if (error)
325 return error;
326
327 xfs_ilock(ip, XFS_ILOCK_EXCL);
328 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
329
330 ip->i_d.di_dmevmask = evmask;
331 ip->i_d.di_dmstate = state;
332
333 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
334 error = xfs_trans_commit(tp);
335
336 return error;
337 }
338
339 STATIC int
340 xfs_fssetdm_by_handle(
341 struct file *parfilp,
342 void __user *arg)
343 {
344 int error;
345 struct fsdmidata fsd;
346 xfs_fsop_setdm_handlereq_t dmhreq;
347 struct dentry *dentry;
348
349 if (!capable(CAP_MKNOD))
350 return -EPERM;
351 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
352 return -EFAULT;
353
354 error = mnt_want_write_file(parfilp);
355 if (error)
356 return error;
357
358 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
359 if (IS_ERR(dentry)) {
360 mnt_drop_write_file(parfilp);
361 return PTR_ERR(dentry);
362 }
363
364 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
365 error = -EPERM;
366 goto out;
367 }
368
369 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
370 error = -EFAULT;
371 goto out;
372 }
373
374 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
375 fsd.fsd_dmstate);
376
377 out:
378 mnt_drop_write_file(parfilp);
379 dput(dentry);
380 return error;
381 }
382
383 STATIC int
384 xfs_attrlist_by_handle(
385 struct file *parfilp,
386 void __user *arg)
387 {
388 int error = -ENOMEM;
389 attrlist_cursor_kern_t *cursor;
390 xfs_fsop_attrlist_handlereq_t al_hreq;
391 struct dentry *dentry;
392 char *kbuf;
393
394 if (!capable(CAP_SYS_ADMIN))
395 return -EPERM;
396 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
397 return -EFAULT;
398 if (al_hreq.buflen < sizeof(struct attrlist) ||
399 al_hreq.buflen > XFS_XATTR_LIST_MAX)
400 return -EINVAL;
401
402 /*
403 * Reject flags, only allow namespaces.
404 */
405 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
406 return -EINVAL;
407
408 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
409 if (IS_ERR(dentry))
410 return PTR_ERR(dentry);
411
412 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
413 if (!kbuf)
414 goto out_dput;
415
416 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
417 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
418 al_hreq.flags, cursor);
419 if (error)
420 goto out_kfree;
421
422 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
423 error = -EFAULT;
424
425 out_kfree:
426 kmem_free(kbuf);
427 out_dput:
428 dput(dentry);
429 return error;
430 }
431
432 int
433 xfs_attrmulti_attr_get(
434 struct inode *inode,
435 unsigned char *name,
436 unsigned char __user *ubuf,
437 __uint32_t *len,
438 __uint32_t flags)
439 {
440 unsigned char *kbuf;
441 int error = -EFAULT;
442
443 if (*len > XFS_XATTR_SIZE_MAX)
444 return -EINVAL;
445 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
446 if (!kbuf)
447 return -ENOMEM;
448
449 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
450 if (error)
451 goto out_kfree;
452
453 if (copy_to_user(ubuf, kbuf, *len))
454 error = -EFAULT;
455
456 out_kfree:
457 kmem_free(kbuf);
458 return error;
459 }
460
461 int
462 xfs_attrmulti_attr_set(
463 struct inode *inode,
464 unsigned char *name,
465 const unsigned char __user *ubuf,
466 __uint32_t len,
467 __uint32_t flags)
468 {
469 unsigned char *kbuf;
470 int error;
471
472 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
473 return -EPERM;
474 if (len > XFS_XATTR_SIZE_MAX)
475 return -EINVAL;
476
477 kbuf = memdup_user(ubuf, len);
478 if (IS_ERR(kbuf))
479 return PTR_ERR(kbuf);
480
481 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
482 if (!error)
483 xfs_forget_acl(inode, name, flags);
484 kfree(kbuf);
485 return error;
486 }
487
488 int
489 xfs_attrmulti_attr_remove(
490 struct inode *inode,
491 unsigned char *name,
492 __uint32_t flags)
493 {
494 int error;
495
496 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
497 return -EPERM;
498 error = xfs_attr_remove(XFS_I(inode), name, flags);
499 if (!error)
500 xfs_forget_acl(inode, name, flags);
501 return error;
502 }
503
504 STATIC int
505 xfs_attrmulti_by_handle(
506 struct file *parfilp,
507 void __user *arg)
508 {
509 int error;
510 xfs_attr_multiop_t *ops;
511 xfs_fsop_attrmulti_handlereq_t am_hreq;
512 struct dentry *dentry;
513 unsigned int i, size;
514 unsigned char *attr_name;
515
516 if (!capable(CAP_SYS_ADMIN))
517 return -EPERM;
518 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
519 return -EFAULT;
520
521 /* overflow check */
522 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
523 return -E2BIG;
524
525 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
526 if (IS_ERR(dentry))
527 return PTR_ERR(dentry);
528
529 error = -E2BIG;
530 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
531 if (!size || size > 16 * PAGE_SIZE)
532 goto out_dput;
533
534 ops = memdup_user(am_hreq.ops, size);
535 if (IS_ERR(ops)) {
536 error = PTR_ERR(ops);
537 goto out_dput;
538 }
539
540 error = -ENOMEM;
541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
542 if (!attr_name)
543 goto out_kfree_ops;
544
545 error = 0;
546 for (i = 0; i < am_hreq.opcount; i++) {
547 ops[i].am_error = strncpy_from_user((char *)attr_name,
548 ops[i].am_attrname, MAXNAMELEN);
549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
550 error = -ERANGE;
551 if (ops[i].am_error < 0)
552 break;
553
554 switch (ops[i].am_opcode) {
555 case ATTR_OP_GET:
556 ops[i].am_error = xfs_attrmulti_attr_get(
557 d_inode(dentry), attr_name,
558 ops[i].am_attrvalue, &ops[i].am_length,
559 ops[i].am_flags);
560 break;
561 case ATTR_OP_SET:
562 ops[i].am_error = mnt_want_write_file(parfilp);
563 if (ops[i].am_error)
564 break;
565 ops[i].am_error = xfs_attrmulti_attr_set(
566 d_inode(dentry), attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
568 ops[i].am_flags);
569 mnt_drop_write_file(parfilp);
570 break;
571 case ATTR_OP_REMOVE:
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_remove(
576 d_inode(dentry), attr_name,
577 ops[i].am_flags);
578 mnt_drop_write_file(parfilp);
579 break;
580 default:
581 ops[i].am_error = -EINVAL;
582 }
583 }
584
585 if (copy_to_user(am_hreq.ops, ops, size))
586 error = -EFAULT;
587
588 kfree(attr_name);
589 out_kfree_ops:
590 kfree(ops);
591 out_dput:
592 dput(dentry);
593 return error;
594 }
595
596 int
597 xfs_ioc_space(
598 struct xfs_inode *ip,
599 struct inode *inode,
600 struct file *filp,
601 int ioflags,
602 unsigned int cmd,
603 xfs_flock64_t *bf)
604 {
605 struct iattr iattr;
606 enum xfs_prealloc_flags flags = 0;
607 uint iolock = XFS_IOLOCK_EXCL;
608 int error;
609
610 /*
611 * Only allow the sys admin to reserve space unless
612 * unwritten extents are enabled.
613 */
614 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
615 !capable(CAP_SYS_ADMIN))
616 return -EPERM;
617
618 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
619 return -EPERM;
620
621 if (!(filp->f_mode & FMODE_WRITE))
622 return -EBADF;
623
624 if (!S_ISREG(inode->i_mode))
625 return -EINVAL;
626
627 if (filp->f_flags & O_DSYNC)
628 flags |= XFS_PREALLOC_SYNC;
629 if (ioflags & XFS_IO_INVIS)
630 flags |= XFS_PREALLOC_INVISIBLE;
631
632 error = mnt_want_write_file(filp);
633 if (error)
634 return error;
635
636 xfs_ilock(ip, iolock);
637 error = xfs_break_layouts(inode, &iolock, false);
638 if (error)
639 goto out_unlock;
640
641 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
642 iolock |= XFS_MMAPLOCK_EXCL;
643
644 switch (bf->l_whence) {
645 case 0: /*SEEK_SET*/
646 break;
647 case 1: /*SEEK_CUR*/
648 bf->l_start += filp->f_pos;
649 break;
650 case 2: /*SEEK_END*/
651 bf->l_start += XFS_ISIZE(ip);
652 break;
653 default:
654 error = -EINVAL;
655 goto out_unlock;
656 }
657
658 /*
659 * length of <= 0 for resv/unresv/zero is invalid. length for
660 * alloc/free is ignored completely and we have no idea what userspace
661 * might have set it to, so set it to zero to allow range
662 * checks to pass.
663 */
664 switch (cmd) {
665 case XFS_IOC_ZERO_RANGE:
666 case XFS_IOC_RESVSP:
667 case XFS_IOC_RESVSP64:
668 case XFS_IOC_UNRESVSP:
669 case XFS_IOC_UNRESVSP64:
670 if (bf->l_len <= 0) {
671 error = -EINVAL;
672 goto out_unlock;
673 }
674 break;
675 default:
676 bf->l_len = 0;
677 break;
678 }
679
680 if (bf->l_start < 0 ||
681 bf->l_start > inode->i_sb->s_maxbytes ||
682 bf->l_start + bf->l_len < 0 ||
683 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
684 error = -EINVAL;
685 goto out_unlock;
686 }
687
688 switch (cmd) {
689 case XFS_IOC_ZERO_RANGE:
690 flags |= XFS_PREALLOC_SET;
691 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
692 break;
693 case XFS_IOC_RESVSP:
694 case XFS_IOC_RESVSP64:
695 flags |= XFS_PREALLOC_SET;
696 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
697 XFS_BMAPI_PREALLOC);
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 flags |= XFS_PREALLOC_CLEAR;
708 if (bf->l_start > XFS_ISIZE(ip)) {
709 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
710 bf->l_start - XFS_ISIZE(ip), 0);
711 if (error)
712 goto out_unlock;
713 }
714
715 iattr.ia_valid = ATTR_SIZE;
716 iattr.ia_size = bf->l_start;
717
718 error = xfs_setattr_size(ip, &iattr);
719 break;
720 default:
721 ASSERT(0);
722 error = -EINVAL;
723 }
724
725 if (error)
726 goto out_unlock;
727
728 error = xfs_update_prealloc_flags(ip, flags);
729
730 out_unlock:
731 xfs_iunlock(ip, iolock);
732 mnt_drop_write_file(filp);
733 return error;
734 }
735
736 STATIC int
737 xfs_ioc_bulkstat(
738 xfs_mount_t *mp,
739 unsigned int cmd,
740 void __user *arg)
741 {
742 xfs_fsop_bulkreq_t bulkreq;
743 int count; /* # of records returned */
744 xfs_ino_t inlast; /* last inode number */
745 int done;
746 int error;
747
748 /* done = 1 if there are more stats to get and if bulkstat */
749 /* should be called again (unused here, but used in dmapi) */
750
751 if (!capable(CAP_SYS_ADMIN))
752 return -EPERM;
753
754 if (XFS_FORCED_SHUTDOWN(mp))
755 return -EIO;
756
757 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
758 return -EFAULT;
759
760 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
761 return -EFAULT;
762
763 if ((count = bulkreq.icount) <= 0)
764 return -EINVAL;
765
766 if (bulkreq.ubuffer == NULL)
767 return -EINVAL;
768
769 if (cmd == XFS_IOC_FSINUMBERS)
770 error = xfs_inumbers(mp, &inlast, &count,
771 bulkreq.ubuffer, xfs_inumbers_fmt);
772 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
773 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
774 sizeof(xfs_bstat_t), NULL, &done);
775 else /* XFS_IOC_FSBULKSTAT */
776 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
777 sizeof(xfs_bstat_t), bulkreq.ubuffer,
778 &done);
779
780 if (error)
781 return error;
782
783 if (bulkreq.ocount != NULL) {
784 if (copy_to_user(bulkreq.lastip, &inlast,
785 sizeof(xfs_ino_t)))
786 return -EFAULT;
787
788 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
789 return -EFAULT;
790 }
791
792 return 0;
793 }
794
795 STATIC int
796 xfs_ioc_fsgeometry_v1(
797 xfs_mount_t *mp,
798 void __user *arg)
799 {
800 xfs_fsop_geom_t fsgeo;
801 int error;
802
803 error = xfs_fs_geometry(mp, &fsgeo, 3);
804 if (error)
805 return error;
806
807 /*
808 * Caller should have passed an argument of type
809 * xfs_fsop_geom_v1_t. This is a proper subset of the
810 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
811 */
812 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
813 return -EFAULT;
814 return 0;
815 }
816
817 STATIC int
818 xfs_ioc_fsgeometry(
819 xfs_mount_t *mp,
820 void __user *arg)
821 {
822 xfs_fsop_geom_t fsgeo;
823 int error;
824
825 error = xfs_fs_geometry(mp, &fsgeo, 4);
826 if (error)
827 return error;
828
829 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
830 return -EFAULT;
831 return 0;
832 }
833
834 /*
835 * Linux extended inode flags interface.
836 */
837
838 STATIC unsigned int
839 xfs_merge_ioc_xflags(
840 unsigned int flags,
841 unsigned int start)
842 {
843 unsigned int xflags = start;
844
845 if (flags & FS_IMMUTABLE_FL)
846 xflags |= FS_XFLAG_IMMUTABLE;
847 else
848 xflags &= ~FS_XFLAG_IMMUTABLE;
849 if (flags & FS_APPEND_FL)
850 xflags |= FS_XFLAG_APPEND;
851 else
852 xflags &= ~FS_XFLAG_APPEND;
853 if (flags & FS_SYNC_FL)
854 xflags |= FS_XFLAG_SYNC;
855 else
856 xflags &= ~FS_XFLAG_SYNC;
857 if (flags & FS_NOATIME_FL)
858 xflags |= FS_XFLAG_NOATIME;
859 else
860 xflags &= ~FS_XFLAG_NOATIME;
861 if (flags & FS_NODUMP_FL)
862 xflags |= FS_XFLAG_NODUMP;
863 else
864 xflags &= ~FS_XFLAG_NODUMP;
865
866 return xflags;
867 }
868
869 STATIC unsigned int
870 xfs_di2lxflags(
871 __uint16_t di_flags)
872 {
873 unsigned int flags = 0;
874
875 if (di_flags & XFS_DIFLAG_IMMUTABLE)
876 flags |= FS_IMMUTABLE_FL;
877 if (di_flags & XFS_DIFLAG_APPEND)
878 flags |= FS_APPEND_FL;
879 if (di_flags & XFS_DIFLAG_SYNC)
880 flags |= FS_SYNC_FL;
881 if (di_flags & XFS_DIFLAG_NOATIME)
882 flags |= FS_NOATIME_FL;
883 if (di_flags & XFS_DIFLAG_NODUMP)
884 flags |= FS_NODUMP_FL;
885 return flags;
886 }
887
888 STATIC int
889 xfs_ioc_fsgetxattr(
890 xfs_inode_t *ip,
891 int attr,
892 void __user *arg)
893 {
894 struct fsxattr fa;
895
896 memset(&fa, 0, sizeof(struct fsxattr));
897
898 xfs_ilock(ip, XFS_ILOCK_SHARED);
899 fa.fsx_xflags = xfs_ip2xflags(ip);
900 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
901 fa.fsx_projid = xfs_get_projid(ip);
902
903 if (attr) {
904 if (ip->i_afp) {
905 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
906 fa.fsx_nextents = ip->i_afp->if_bytes /
907 sizeof(xfs_bmbt_rec_t);
908 else
909 fa.fsx_nextents = ip->i_d.di_anextents;
910 } else
911 fa.fsx_nextents = 0;
912 } else {
913 if (ip->i_df.if_flags & XFS_IFEXTENTS)
914 fa.fsx_nextents = ip->i_df.if_bytes /
915 sizeof(xfs_bmbt_rec_t);
916 else
917 fa.fsx_nextents = ip->i_d.di_nextents;
918 }
919 xfs_iunlock(ip, XFS_ILOCK_SHARED);
920
921 if (copy_to_user(arg, &fa, sizeof(fa)))
922 return -EFAULT;
923 return 0;
924 }
925
926 STATIC void
927 xfs_set_diflags(
928 struct xfs_inode *ip,
929 unsigned int xflags)
930 {
931 unsigned int di_flags;
932 uint64_t di_flags2;
933
934 /* can't set PREALLOC this way, just preserve it */
935 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
936 if (xflags & FS_XFLAG_IMMUTABLE)
937 di_flags |= XFS_DIFLAG_IMMUTABLE;
938 if (xflags & FS_XFLAG_APPEND)
939 di_flags |= XFS_DIFLAG_APPEND;
940 if (xflags & FS_XFLAG_SYNC)
941 di_flags |= XFS_DIFLAG_SYNC;
942 if (xflags & FS_XFLAG_NOATIME)
943 di_flags |= XFS_DIFLAG_NOATIME;
944 if (xflags & FS_XFLAG_NODUMP)
945 di_flags |= XFS_DIFLAG_NODUMP;
946 if (xflags & FS_XFLAG_NODEFRAG)
947 di_flags |= XFS_DIFLAG_NODEFRAG;
948 if (xflags & FS_XFLAG_FILESTREAM)
949 di_flags |= XFS_DIFLAG_FILESTREAM;
950 if (S_ISDIR(VFS_I(ip)->i_mode)) {
951 if (xflags & FS_XFLAG_RTINHERIT)
952 di_flags |= XFS_DIFLAG_RTINHERIT;
953 if (xflags & FS_XFLAG_NOSYMLINKS)
954 di_flags |= XFS_DIFLAG_NOSYMLINKS;
955 if (xflags & FS_XFLAG_EXTSZINHERIT)
956 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
957 if (xflags & FS_XFLAG_PROJINHERIT)
958 di_flags |= XFS_DIFLAG_PROJINHERIT;
959 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
960 if (xflags & FS_XFLAG_REALTIME)
961 di_flags |= XFS_DIFLAG_REALTIME;
962 if (xflags & FS_XFLAG_EXTSIZE)
963 di_flags |= XFS_DIFLAG_EXTSIZE;
964 }
965 ip->i_d.di_flags = di_flags;
966
967 /* diflags2 only valid for v3 inodes. */
968 if (ip->i_d.di_version < 3)
969 return;
970
971 di_flags2 = 0;
972 if (xflags & FS_XFLAG_DAX)
973 di_flags2 |= XFS_DIFLAG2_DAX;
974
975 ip->i_d.di_flags2 = di_flags2;
976
977 }
978
979 STATIC void
980 xfs_diflags_to_linux(
981 struct xfs_inode *ip)
982 {
983 struct inode *inode = VFS_I(ip);
984 unsigned int xflags = xfs_ip2xflags(ip);
985
986 if (xflags & FS_XFLAG_IMMUTABLE)
987 inode->i_flags |= S_IMMUTABLE;
988 else
989 inode->i_flags &= ~S_IMMUTABLE;
990 if (xflags & FS_XFLAG_APPEND)
991 inode->i_flags |= S_APPEND;
992 else
993 inode->i_flags &= ~S_APPEND;
994 if (xflags & FS_XFLAG_SYNC)
995 inode->i_flags |= S_SYNC;
996 else
997 inode->i_flags &= ~S_SYNC;
998 if (xflags & FS_XFLAG_NOATIME)
999 inode->i_flags |= S_NOATIME;
1000 else
1001 inode->i_flags &= ~S_NOATIME;
1002 if (xflags & FS_XFLAG_DAX)
1003 inode->i_flags |= S_DAX;
1004 else
1005 inode->i_flags &= ~S_DAX;
1006
1007 }
1008
1009 static int
1010 xfs_ioctl_setattr_xflags(
1011 struct xfs_trans *tp,
1012 struct xfs_inode *ip,
1013 struct fsxattr *fa)
1014 {
1015 struct xfs_mount *mp = ip->i_mount;
1016
1017 /* Can't change realtime flag if any extents are allocated. */
1018 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1019 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1020 return -EINVAL;
1021
1022 /* If realtime flag is set then must have realtime device */
1023 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1024 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1025 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1026 return -EINVAL;
1027 }
1028
1029 /*
1030 * Can't modify an immutable/append-only file unless
1031 * we have appropriate permission.
1032 */
1033 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1034 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1035 !capable(CAP_LINUX_IMMUTABLE))
1036 return -EPERM;
1037
1038 xfs_set_diflags(ip, fa->fsx_xflags);
1039 xfs_diflags_to_linux(ip);
1040 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1041 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1042 XFS_STATS_INC(mp, xs_ig_attrchg);
1043 return 0;
1044 }
1045
1046 /*
1047 * If we are changing DAX flags, we have to ensure the file is clean and any
1048 * cached objects in the address space are invalidated and removed. This
1049 * requires us to lock out other IO and page faults similar to a truncate
1050 * operation. The locks need to be held until the transaction has been committed
1051 * so that the cache invalidation is atomic with respect to the DAX flag
1052 * manipulation.
1053 */
1054 static int
1055 xfs_ioctl_setattr_dax_invalidate(
1056 struct xfs_inode *ip,
1057 struct fsxattr *fa,
1058 int *join_flags)
1059 {
1060 struct inode *inode = VFS_I(ip);
1061 int error;
1062
1063 *join_flags = 0;
1064
1065 /*
1066 * It is only valid to set the DAX flag on regular files and
1067 * directories on filesystems where the block size is equal to the page
1068 * size. On directories it serves as an inherit hint.
1069 */
1070 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1071 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1072 return -EINVAL;
1073 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1074 return -EINVAL;
1075 }
1076
1077 /* If the DAX state is not changing, we have nothing to do here. */
1078 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1079 return 0;
1080 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1081 return 0;
1082
1083 /* lock, flush and invalidate mapping in preparation for flag change */
1084 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1085 error = filemap_write_and_wait(inode->i_mapping);
1086 if (error)
1087 goto out_unlock;
1088 error = invalidate_inode_pages2(inode->i_mapping);
1089 if (error)
1090 goto out_unlock;
1091
1092 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1093 return 0;
1094
1095 out_unlock:
1096 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1097 return error;
1098
1099 }
1100
1101 /*
1102 * Set up the transaction structure for the setattr operation, checking that we
1103 * have permission to do so. On success, return a clean transaction and the
1104 * inode locked exclusively ready for further operation specific checks. On
1105 * failure, return an error without modifying or locking the inode.
1106 *
1107 * The inode might already be IO locked on call. If this is the case, it is
1108 * indicated in @join_flags and we take full responsibility for ensuring they
1109 * are unlocked from now on. Hence if we have an error here, we still have to
1110 * unlock them. Otherwise, once they are joined to the transaction, they will
1111 * be unlocked on commit/cancel.
1112 */
1113 static struct xfs_trans *
1114 xfs_ioctl_setattr_get_trans(
1115 struct xfs_inode *ip,
1116 int join_flags)
1117 {
1118 struct xfs_mount *mp = ip->i_mount;
1119 struct xfs_trans *tp;
1120 int error = -EROFS;
1121
1122 if (mp->m_flags & XFS_MOUNT_RDONLY)
1123 goto out_unlock;
1124 error = -EIO;
1125 if (XFS_FORCED_SHUTDOWN(mp))
1126 goto out_unlock;
1127
1128 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1129 if (error)
1130 return ERR_PTR(error);
1131
1132 xfs_ilock(ip, XFS_ILOCK_EXCL);
1133 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1134 join_flags = 0;
1135
1136 /*
1137 * CAP_FOWNER overrides the following restrictions:
1138 *
1139 * The user ID of the calling process must be equal to the file owner
1140 * ID, except in cases where the CAP_FSETID capability is applicable.
1141 */
1142 if (!inode_owner_or_capable(VFS_I(ip))) {
1143 error = -EPERM;
1144 goto out_cancel;
1145 }
1146
1147 if (mp->m_flags & XFS_MOUNT_WSYNC)
1148 xfs_trans_set_sync(tp);
1149
1150 return tp;
1151
1152 out_cancel:
1153 xfs_trans_cancel(tp);
1154 out_unlock:
1155 if (join_flags)
1156 xfs_iunlock(ip, join_flags);
1157 return ERR_PTR(error);
1158 }
1159
1160 /*
1161 * extent size hint validation is somewhat cumbersome. Rules are:
1162 *
1163 * 1. extent size hint is only valid for directories and regular files
1164 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1165 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1166 * 4. can only be changed on regular files if no extents are allocated
1167 * 5. can be changed on directories at any time
1168 * 6. extsize hint of 0 turns off hints, clears inode flags.
1169 * 7. Extent size must be a multiple of the appropriate block size.
1170 * 8. for non-realtime files, the extent size hint must be limited
1171 * to half the AG size to avoid alignment extending the extent beyond the
1172 * limits of the AG.
1173 */
1174 static int
1175 xfs_ioctl_setattr_check_extsize(
1176 struct xfs_inode *ip,
1177 struct fsxattr *fa)
1178 {
1179 struct xfs_mount *mp = ip->i_mount;
1180
1181 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1182 return -EINVAL;
1183
1184 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1185 !S_ISDIR(VFS_I(ip)->i_mode))
1186 return -EINVAL;
1187
1188 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1189 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1190 return -EINVAL;
1191
1192 if (fa->fsx_extsize != 0) {
1193 xfs_extlen_t size;
1194 xfs_fsblock_t extsize_fsb;
1195
1196 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1197 if (extsize_fsb > MAXEXTLEN)
1198 return -EINVAL;
1199
1200 if (XFS_IS_REALTIME_INODE(ip) ||
1201 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1202 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1203 } else {
1204 size = mp->m_sb.sb_blocksize;
1205 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1206 return -EINVAL;
1207 }
1208
1209 if (fa->fsx_extsize % size)
1210 return -EINVAL;
1211 } else
1212 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1213
1214 return 0;
1215 }
1216
1217 static int
1218 xfs_ioctl_setattr_check_projid(
1219 struct xfs_inode *ip,
1220 struct fsxattr *fa)
1221 {
1222 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1223 if (fa->fsx_projid > (__uint16_t)-1 &&
1224 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1225 return -EINVAL;
1226
1227 /*
1228 * Project Quota ID state is only allowed to change from within the init
1229 * namespace. Enforce that restriction only if we are trying to change
1230 * the quota ID state. Everything else is allowed in user namespaces.
1231 */
1232 if (current_user_ns() == &init_user_ns)
1233 return 0;
1234
1235 if (xfs_get_projid(ip) != fa->fsx_projid)
1236 return -EINVAL;
1237 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1238 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1239 return -EINVAL;
1240
1241 return 0;
1242 }
1243
1244 STATIC int
1245 xfs_ioctl_setattr(
1246 xfs_inode_t *ip,
1247 struct fsxattr *fa)
1248 {
1249 struct xfs_mount *mp = ip->i_mount;
1250 struct xfs_trans *tp;
1251 struct xfs_dquot *udqp = NULL;
1252 struct xfs_dquot *pdqp = NULL;
1253 struct xfs_dquot *olddquot = NULL;
1254 int code;
1255 int join_flags = 0;
1256
1257 trace_xfs_ioctl_setattr(ip);
1258
1259 code = xfs_ioctl_setattr_check_projid(ip, fa);
1260 if (code)
1261 return code;
1262
1263 /*
1264 * If disk quotas is on, we make sure that the dquots do exist on disk,
1265 * before we start any other transactions. Trying to do this later
1266 * is messy. We don't care to take a readlock to look at the ids
1267 * in inode here, because we can't hold it across the trans_reserve.
1268 * If the IDs do change before we take the ilock, we're covered
1269 * because the i_*dquot fields will get updated anyway.
1270 */
1271 if (XFS_IS_QUOTA_ON(mp)) {
1272 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1273 ip->i_d.di_gid, fa->fsx_projid,
1274 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1275 if (code)
1276 return code;
1277 }
1278
1279 /*
1280 * Changing DAX config may require inode locking for mapping
1281 * invalidation. These need to be held all the way to transaction commit
1282 * or cancel time, so need to be passed through to
1283 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1284 * appropriately.
1285 */
1286 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1287 if (code)
1288 goto error_free_dquots;
1289
1290 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1291 if (IS_ERR(tp)) {
1292 code = PTR_ERR(tp);
1293 goto error_free_dquots;
1294 }
1295
1296
1297 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1298 xfs_get_projid(ip) != fa->fsx_projid) {
1299 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1300 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1301 if (code) /* out of quota */
1302 goto error_trans_cancel;
1303 }
1304
1305 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1306 if (code)
1307 goto error_trans_cancel;
1308
1309 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1310 if (code)
1311 goto error_trans_cancel;
1312
1313 /*
1314 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1315 * overrides the following restrictions:
1316 *
1317 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1318 * successful return from chown()
1319 */
1320
1321 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1322 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1323 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1324
1325 /* Change the ownerships and register project quota modifications */
1326 if (xfs_get_projid(ip) != fa->fsx_projid) {
1327 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1328 olddquot = xfs_qm_vop_chown(tp, ip,
1329 &ip->i_pdquot, pdqp);
1330 }
1331 ASSERT(ip->i_d.di_version > 1);
1332 xfs_set_projid(ip, fa->fsx_projid);
1333 }
1334
1335 /*
1336 * Only set the extent size hint if we've already determined that the
1337 * extent size hint should be set on the inode. If no extent size flags
1338 * are set on the inode then unconditionally clear the extent size hint.
1339 */
1340 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1341 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1342 else
1343 ip->i_d.di_extsize = 0;
1344
1345 code = xfs_trans_commit(tp);
1346
1347 /*
1348 * Release any dquot(s) the inode had kept before chown.
1349 */
1350 xfs_qm_dqrele(olddquot);
1351 xfs_qm_dqrele(udqp);
1352 xfs_qm_dqrele(pdqp);
1353
1354 return code;
1355
1356 error_trans_cancel:
1357 xfs_trans_cancel(tp);
1358 error_free_dquots:
1359 xfs_qm_dqrele(udqp);
1360 xfs_qm_dqrele(pdqp);
1361 return code;
1362 }
1363
1364 STATIC int
1365 xfs_ioc_fssetxattr(
1366 xfs_inode_t *ip,
1367 struct file *filp,
1368 void __user *arg)
1369 {
1370 struct fsxattr fa;
1371 int error;
1372
1373 if (copy_from_user(&fa, arg, sizeof(fa)))
1374 return -EFAULT;
1375
1376 error = mnt_want_write_file(filp);
1377 if (error)
1378 return error;
1379 error = xfs_ioctl_setattr(ip, &fa);
1380 mnt_drop_write_file(filp);
1381 return error;
1382 }
1383
1384 STATIC int
1385 xfs_ioc_getxflags(
1386 xfs_inode_t *ip,
1387 void __user *arg)
1388 {
1389 unsigned int flags;
1390
1391 flags = xfs_di2lxflags(ip->i_d.di_flags);
1392 if (copy_to_user(arg, &flags, sizeof(flags)))
1393 return -EFAULT;
1394 return 0;
1395 }
1396
1397 STATIC int
1398 xfs_ioc_setxflags(
1399 struct xfs_inode *ip,
1400 struct file *filp,
1401 void __user *arg)
1402 {
1403 struct xfs_trans *tp;
1404 struct fsxattr fa;
1405 unsigned int flags;
1406 int join_flags = 0;
1407 int error;
1408
1409 if (copy_from_user(&flags, arg, sizeof(flags)))
1410 return -EFAULT;
1411
1412 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1413 FS_NOATIME_FL | FS_NODUMP_FL | \
1414 FS_SYNC_FL))
1415 return -EOPNOTSUPP;
1416
1417 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1418
1419 error = mnt_want_write_file(filp);
1420 if (error)
1421 return error;
1422
1423 /*
1424 * Changing DAX config may require inode locking for mapping
1425 * invalidation. These need to be held all the way to transaction commit
1426 * or cancel time, so need to be passed through to
1427 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1428 * appropriately.
1429 */
1430 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1431 if (error)
1432 goto out_drop_write;
1433
1434 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1435 if (IS_ERR(tp)) {
1436 error = PTR_ERR(tp);
1437 goto out_drop_write;
1438 }
1439
1440 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1441 if (error) {
1442 xfs_trans_cancel(tp);
1443 goto out_drop_write;
1444 }
1445
1446 error = xfs_trans_commit(tp);
1447 out_drop_write:
1448 mnt_drop_write_file(filp);
1449 return error;
1450 }
1451
1452 STATIC int
1453 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1454 {
1455 struct getbmap __user *base = (struct getbmap __user *)*ap;
1456
1457 /* copy only getbmap portion (not getbmapx) */
1458 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1459 return -EFAULT;
1460
1461 *ap += sizeof(struct getbmap);
1462 return 0;
1463 }
1464
1465 STATIC int
1466 xfs_ioc_getbmap(
1467 struct xfs_inode *ip,
1468 int ioflags,
1469 unsigned int cmd,
1470 void __user *arg)
1471 {
1472 struct getbmapx bmx;
1473 int error;
1474
1475 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1476 return -EFAULT;
1477
1478 if (bmx.bmv_count < 2)
1479 return -EINVAL;
1480
1481 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1482 if (ioflags & XFS_IO_INVIS)
1483 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1484
1485 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1486 (__force struct getbmap *)arg+1);
1487 if (error)
1488 return error;
1489
1490 /* copy back header - only size of getbmap */
1491 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1492 return -EFAULT;
1493 return 0;
1494 }
1495
1496 STATIC int
1497 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1498 {
1499 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1500
1501 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1502 return -EFAULT;
1503
1504 *ap += sizeof(struct getbmapx);
1505 return 0;
1506 }
1507
1508 STATIC int
1509 xfs_ioc_getbmapx(
1510 struct xfs_inode *ip,
1511 void __user *arg)
1512 {
1513 struct getbmapx bmx;
1514 int error;
1515
1516 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1517 return -EFAULT;
1518
1519 if (bmx.bmv_count < 2)
1520 return -EINVAL;
1521
1522 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1523 return -EINVAL;
1524
1525 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1526 (__force struct getbmapx *)arg+1);
1527 if (error)
1528 return error;
1529
1530 /* copy back header */
1531 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1532 return -EFAULT;
1533
1534 return 0;
1535 }
1536
1537 int
1538 xfs_ioc_swapext(
1539 xfs_swapext_t *sxp)
1540 {
1541 xfs_inode_t *ip, *tip;
1542 struct fd f, tmp;
1543 int error = 0;
1544
1545 /* Pull information for the target fd */
1546 f = fdget((int)sxp->sx_fdtarget);
1547 if (!f.file) {
1548 error = -EINVAL;
1549 goto out;
1550 }
1551
1552 if (!(f.file->f_mode & FMODE_WRITE) ||
1553 !(f.file->f_mode & FMODE_READ) ||
1554 (f.file->f_flags & O_APPEND)) {
1555 error = -EBADF;
1556 goto out_put_file;
1557 }
1558
1559 tmp = fdget((int)sxp->sx_fdtmp);
1560 if (!tmp.file) {
1561 error = -EINVAL;
1562 goto out_put_file;
1563 }
1564
1565 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1566 !(tmp.file->f_mode & FMODE_READ) ||
1567 (tmp.file->f_flags & O_APPEND)) {
1568 error = -EBADF;
1569 goto out_put_tmp_file;
1570 }
1571
1572 if (IS_SWAPFILE(file_inode(f.file)) ||
1573 IS_SWAPFILE(file_inode(tmp.file))) {
1574 error = -EINVAL;
1575 goto out_put_tmp_file;
1576 }
1577
1578 ip = XFS_I(file_inode(f.file));
1579 tip = XFS_I(file_inode(tmp.file));
1580
1581 if (ip->i_mount != tip->i_mount) {
1582 error = -EINVAL;
1583 goto out_put_tmp_file;
1584 }
1585
1586 if (ip->i_ino == tip->i_ino) {
1587 error = -EINVAL;
1588 goto out_put_tmp_file;
1589 }
1590
1591 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1592 error = -EIO;
1593 goto out_put_tmp_file;
1594 }
1595
1596 error = xfs_swap_extents(ip, tip, sxp);
1597
1598 out_put_tmp_file:
1599 fdput(tmp);
1600 out_put_file:
1601 fdput(f);
1602 out:
1603 return error;
1604 }
1605
1606 /*
1607 * Note: some of the ioctl's return positive numbers as a
1608 * byte count indicating success, such as readlink_by_handle.
1609 * So we don't "sign flip" like most other routines. This means
1610 * true errors need to be returned as a negative value.
1611 */
1612 long
1613 xfs_file_ioctl(
1614 struct file *filp,
1615 unsigned int cmd,
1616 unsigned long p)
1617 {
1618 struct inode *inode = file_inode(filp);
1619 struct xfs_inode *ip = XFS_I(inode);
1620 struct xfs_mount *mp = ip->i_mount;
1621 void __user *arg = (void __user *)p;
1622 int ioflags = 0;
1623 int error;
1624
1625 if (filp->f_mode & FMODE_NOCMTIME)
1626 ioflags |= XFS_IO_INVIS;
1627
1628 trace_xfs_file_ioctl(ip);
1629
1630 switch (cmd) {
1631 case FITRIM:
1632 return xfs_ioc_trim(mp, arg);
1633 case XFS_IOC_ALLOCSP:
1634 case XFS_IOC_FREESP:
1635 case XFS_IOC_RESVSP:
1636 case XFS_IOC_UNRESVSP:
1637 case XFS_IOC_ALLOCSP64:
1638 case XFS_IOC_FREESP64:
1639 case XFS_IOC_RESVSP64:
1640 case XFS_IOC_UNRESVSP64:
1641 case XFS_IOC_ZERO_RANGE: {
1642 xfs_flock64_t bf;
1643
1644 if (copy_from_user(&bf, arg, sizeof(bf)))
1645 return -EFAULT;
1646 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1647 }
1648 case XFS_IOC_DIOINFO: {
1649 struct dioattr da;
1650 xfs_buftarg_t *target =
1651 XFS_IS_REALTIME_INODE(ip) ?
1652 mp->m_rtdev_targp : mp->m_ddev_targp;
1653
1654 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1655 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1656
1657 if (copy_to_user(arg, &da, sizeof(da)))
1658 return -EFAULT;
1659 return 0;
1660 }
1661
1662 case XFS_IOC_FSBULKSTAT_SINGLE:
1663 case XFS_IOC_FSBULKSTAT:
1664 case XFS_IOC_FSINUMBERS:
1665 return xfs_ioc_bulkstat(mp, cmd, arg);
1666
1667 case XFS_IOC_FSGEOMETRY_V1:
1668 return xfs_ioc_fsgeometry_v1(mp, arg);
1669
1670 case XFS_IOC_FSGEOMETRY:
1671 return xfs_ioc_fsgeometry(mp, arg);
1672
1673 case XFS_IOC_GETVERSION:
1674 return put_user(inode->i_generation, (int __user *)arg);
1675
1676 case XFS_IOC_FSGETXATTR:
1677 return xfs_ioc_fsgetxattr(ip, 0, arg);
1678 case XFS_IOC_FSGETXATTRA:
1679 return xfs_ioc_fsgetxattr(ip, 1, arg);
1680 case XFS_IOC_FSSETXATTR:
1681 return xfs_ioc_fssetxattr(ip, filp, arg);
1682 case XFS_IOC_GETXFLAGS:
1683 return xfs_ioc_getxflags(ip, arg);
1684 case XFS_IOC_SETXFLAGS:
1685 return xfs_ioc_setxflags(ip, filp, arg);
1686
1687 case XFS_IOC_FSSETDM: {
1688 struct fsdmidata dmi;
1689
1690 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1691 return -EFAULT;
1692
1693 error = mnt_want_write_file(filp);
1694 if (error)
1695 return error;
1696
1697 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1698 dmi.fsd_dmstate);
1699 mnt_drop_write_file(filp);
1700 return error;
1701 }
1702
1703 case XFS_IOC_GETBMAP:
1704 case XFS_IOC_GETBMAPA:
1705 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1706
1707 case XFS_IOC_GETBMAPX:
1708 return xfs_ioc_getbmapx(ip, arg);
1709
1710 case XFS_IOC_FD_TO_HANDLE:
1711 case XFS_IOC_PATH_TO_HANDLE:
1712 case XFS_IOC_PATH_TO_FSHANDLE: {
1713 xfs_fsop_handlereq_t hreq;
1714
1715 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1716 return -EFAULT;
1717 return xfs_find_handle(cmd, &hreq);
1718 }
1719 case XFS_IOC_OPEN_BY_HANDLE: {
1720 xfs_fsop_handlereq_t hreq;
1721
1722 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1723 return -EFAULT;
1724 return xfs_open_by_handle(filp, &hreq);
1725 }
1726 case XFS_IOC_FSSETDM_BY_HANDLE:
1727 return xfs_fssetdm_by_handle(filp, arg);
1728
1729 case XFS_IOC_READLINK_BY_HANDLE: {
1730 xfs_fsop_handlereq_t hreq;
1731
1732 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1733 return -EFAULT;
1734 return xfs_readlink_by_handle(filp, &hreq);
1735 }
1736 case XFS_IOC_ATTRLIST_BY_HANDLE:
1737 return xfs_attrlist_by_handle(filp, arg);
1738
1739 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1740 return xfs_attrmulti_by_handle(filp, arg);
1741
1742 case XFS_IOC_SWAPEXT: {
1743 struct xfs_swapext sxp;
1744
1745 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1746 return -EFAULT;
1747 error = mnt_want_write_file(filp);
1748 if (error)
1749 return error;
1750 error = xfs_ioc_swapext(&sxp);
1751 mnt_drop_write_file(filp);
1752 return error;
1753 }
1754
1755 case XFS_IOC_FSCOUNTS: {
1756 xfs_fsop_counts_t out;
1757
1758 error = xfs_fs_counts(mp, &out);
1759 if (error)
1760 return error;
1761
1762 if (copy_to_user(arg, &out, sizeof(out)))
1763 return -EFAULT;
1764 return 0;
1765 }
1766
1767 case XFS_IOC_SET_RESBLKS: {
1768 xfs_fsop_resblks_t inout;
1769 __uint64_t in;
1770
1771 if (!capable(CAP_SYS_ADMIN))
1772 return -EPERM;
1773
1774 if (mp->m_flags & XFS_MOUNT_RDONLY)
1775 return -EROFS;
1776
1777 if (copy_from_user(&inout, arg, sizeof(inout)))
1778 return -EFAULT;
1779
1780 error = mnt_want_write_file(filp);
1781 if (error)
1782 return error;
1783
1784 /* input parameter is passed in resblks field of structure */
1785 in = inout.resblks;
1786 error = xfs_reserve_blocks(mp, &in, &inout);
1787 mnt_drop_write_file(filp);
1788 if (error)
1789 return error;
1790
1791 if (copy_to_user(arg, &inout, sizeof(inout)))
1792 return -EFAULT;
1793 return 0;
1794 }
1795
1796 case XFS_IOC_GET_RESBLKS: {
1797 xfs_fsop_resblks_t out;
1798
1799 if (!capable(CAP_SYS_ADMIN))
1800 return -EPERM;
1801
1802 error = xfs_reserve_blocks(mp, NULL, &out);
1803 if (error)
1804 return error;
1805
1806 if (copy_to_user(arg, &out, sizeof(out)))
1807 return -EFAULT;
1808
1809 return 0;
1810 }
1811
1812 case XFS_IOC_FSGROWFSDATA: {
1813 xfs_growfs_data_t in;
1814
1815 if (copy_from_user(&in, arg, sizeof(in)))
1816 return -EFAULT;
1817
1818 error = mnt_want_write_file(filp);
1819 if (error)
1820 return error;
1821 error = xfs_growfs_data(mp, &in);
1822 mnt_drop_write_file(filp);
1823 return error;
1824 }
1825
1826 case XFS_IOC_FSGROWFSLOG: {
1827 xfs_growfs_log_t in;
1828
1829 if (copy_from_user(&in, arg, sizeof(in)))
1830 return -EFAULT;
1831
1832 error = mnt_want_write_file(filp);
1833 if (error)
1834 return error;
1835 error = xfs_growfs_log(mp, &in);
1836 mnt_drop_write_file(filp);
1837 return error;
1838 }
1839
1840 case XFS_IOC_FSGROWFSRT: {
1841 xfs_growfs_rt_t in;
1842
1843 if (copy_from_user(&in, arg, sizeof(in)))
1844 return -EFAULT;
1845
1846 error = mnt_want_write_file(filp);
1847 if (error)
1848 return error;
1849 error = xfs_growfs_rt(mp, &in);
1850 mnt_drop_write_file(filp);
1851 return error;
1852 }
1853
1854 case XFS_IOC_GOINGDOWN: {
1855 __uint32_t in;
1856
1857 if (!capable(CAP_SYS_ADMIN))
1858 return -EPERM;
1859
1860 if (get_user(in, (__uint32_t __user *)arg))
1861 return -EFAULT;
1862
1863 return xfs_fs_goingdown(mp, in);
1864 }
1865
1866 case XFS_IOC_ERROR_INJECTION: {
1867 xfs_error_injection_t in;
1868
1869 if (!capable(CAP_SYS_ADMIN))
1870 return -EPERM;
1871
1872 if (copy_from_user(&in, arg, sizeof(in)))
1873 return -EFAULT;
1874
1875 return xfs_errortag_add(in.errtag, mp);
1876 }
1877
1878 case XFS_IOC_ERROR_CLEARALL:
1879 if (!capable(CAP_SYS_ADMIN))
1880 return -EPERM;
1881
1882 return xfs_errortag_clearall(mp, 1);
1883
1884 case XFS_IOC_FREE_EOFBLOCKS: {
1885 struct xfs_fs_eofblocks eofb;
1886 struct xfs_eofblocks keofb;
1887
1888 if (!capable(CAP_SYS_ADMIN))
1889 return -EPERM;
1890
1891 if (mp->m_flags & XFS_MOUNT_RDONLY)
1892 return -EROFS;
1893
1894 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1895 return -EFAULT;
1896
1897 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1898 if (error)
1899 return error;
1900
1901 return xfs_icache_free_eofblocks(mp, &keofb);
1902 }
1903
1904 default:
1905 return -ENOTTY;
1906 }
1907 }
Linux kernel - Deliverables
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