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1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_bit.h"
21#include "xfs_log.h"
22#include "xfs_inum.h"
23#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_alloc.h"
27#include "xfs_mount.h"
28#include "xfs_bmap_btree.h"
29#include "xfs_dinode.h"
30#include "xfs_inode.h"
31#include "xfs_ioctl.h"
32#include "xfs_rtalloc.h"
33#include "xfs_itable.h"
34#include "xfs_error.h"
35#include "xfs_attr.h"
36#include "xfs_bmap.h"
37#include "xfs_buf_item.h"
38#include "xfs_utils.h"
39#include "xfs_dfrag.h"
40#include "xfs_fsops.h"
41#include "xfs_vnodeops.h"
42#include "xfs_discard.h"
43#include "xfs_quota.h"
44#include "xfs_inode_item.h"
45#include "xfs_export.h"
46#include "xfs_trace.h"
47
48#include <linux/capability.h>
49#include <linux/dcache.h>
50#include <linux/mount.h>
51#include <linux/namei.h>
52#include <linux/pagemap.h>
53#include <linux/slab.h>
54#include <linux/exportfs.h>
55
56/*
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
59 *
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
66 */
67int
68xfs_find_handle(
69 unsigned int cmd,
70 xfs_fsop_handlereq_t *hreq)
71{
72 int hsize;
73 xfs_handle_t handle;
74 struct inode *inode;
75 struct file *file = NULL;
76 struct path path;
77 int error;
78 struct xfs_inode *ip;
79
80 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 file = fget(hreq->fd);
82 if (!file)
83 return -EBADF;
84 inode = file->f_path.dentry->d_inode;
85 } else {
86 error = user_lpath((const char __user *)hreq->path, &path);
87 if (error)
88 return error;
89 inode = path.dentry->d_inode;
90 }
91 ip = XFS_I(inode);
92
93 /*
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
96 */
97 error = -EINVAL;
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 goto out_put;
100
101 error = -EBADF;
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
105 goto out_put;
106
107
108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109
110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 /*
112 * This handle only contains an fsid, zero the rest.
113 */
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
116 } else {
117 int lock_mode;
118
119 lock_mode = xfs_ilock_map_shared(ip);
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 xfs_iunlock_map_shared(ip, lock_mode);
126
127 hsize = XFS_HSIZE(handle);
128 }
129
130 error = -EFAULT;
131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
133 goto out_put;
134
135 error = 0;
136
137 out_put:
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 fput(file);
140 else
141 path_put(&path);
142 return error;
143}
144
145/*
146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
148 */
149STATIC int
150xfs_handle_acceptable(
151 void *context,
152 struct dentry *dentry)
153{
154 return 1;
155}
156
157/*
158 * Convert userspace handle data into a dentry.
159 */
160struct dentry *
161xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
164 u32 hlen)
165{
166 xfs_handle_t handle;
167 struct xfs_fid64 fid;
168
169 /*
170 * Only allow handle opens under a directory.
171 */
172 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
173 return ERR_PTR(-ENOTDIR);
174
175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
182
183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
186
187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
190}
191
192STATIC struct dentry *
193xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196{
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
198}
199
200int
201xfs_open_by_handle(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
204{
205 const struct cred *cred = current_cred();
206 int error;
207 int fd;
208 int permflag;
209 struct file *filp;
210 struct inode *inode;
211 struct dentry *dentry;
212
213 if (!capable(CAP_SYS_ADMIN))
214 return -XFS_ERROR(EPERM);
215
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 if (IS_ERR(dentry))
218 return PTR_ERR(dentry);
219 inode = dentry->d_inode;
220
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
223 error = -XFS_ERROR(EPERM);
224 goto out_dput;
225 }
226
227#if BITS_PER_LONG != 32
228 hreq->oflags |= O_LARGEFILE;
229#endif
230
231 /* Put open permission in namei format. */
232 permflag = hreq->oflags;
233 if ((permflag+1) & O_ACCMODE)
234 permflag++;
235 if (permflag & O_TRUNC)
236 permflag |= 2;
237
238 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
239 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
240 error = -XFS_ERROR(EPERM);
241 goto out_dput;
242 }
243
244 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
245 error = -XFS_ERROR(EACCES);
246 goto out_dput;
247 }
248
249 /* Can't write directories. */
250 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
251 error = -XFS_ERROR(EISDIR);
252 goto out_dput;
253 }
254
255 fd = get_unused_fd();
256 if (fd < 0) {
257 error = fd;
258 goto out_dput;
259 }
260
261 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
262 hreq->oflags, cred);
263 if (IS_ERR(filp)) {
264 put_unused_fd(fd);
265 return PTR_ERR(filp);
266 }
267
268 if (S_ISREG(inode->i_mode)) {
269 filp->f_flags |= O_NOATIME;
270 filp->f_mode |= FMODE_NOCMTIME;
271 }
272
273 fd_install(fd, filp);
274 return fd;
275
276 out_dput:
277 dput(dentry);
278 return error;
279}
280
281/*
282 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
283 * unused first argument.
284 */
285STATIC int
286do_readlink(
287 char __user *buffer,
288 int buflen,
289 const char *link)
290{
291 int len;
292
293 len = PTR_ERR(link);
294 if (IS_ERR(link))
295 goto out;
296
297 len = strlen(link);
298 if (len > (unsigned) buflen)
299 len = buflen;
300 if (copy_to_user(buffer, link, len))
301 len = -EFAULT;
302 out:
303 return len;
304}
305
306
307int
308xfs_readlink_by_handle(
309 struct file *parfilp,
310 xfs_fsop_handlereq_t *hreq)
311{
312 struct dentry *dentry;
313 __u32 olen;
314 void *link;
315 int error;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -XFS_ERROR(EPERM);
319
320 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
321 if (IS_ERR(dentry))
322 return PTR_ERR(dentry);
323
324 /* Restrict this handle operation to symlinks only. */
325 if (!S_ISLNK(dentry->d_inode->i_mode)) {
326 error = -XFS_ERROR(EINVAL);
327 goto out_dput;
328 }
329
330 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
331 error = -XFS_ERROR(EFAULT);
332 goto out_dput;
333 }
334
335 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
336 if (!link) {
337 error = -XFS_ERROR(ENOMEM);
338 goto out_dput;
339 }
340
341 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
342 if (error)
343 goto out_kfree;
344 error = do_readlink(hreq->ohandle, olen, link);
345 if (error)
346 goto out_kfree;
347
348 out_kfree:
349 kfree(link);
350 out_dput:
351 dput(dentry);
352 return error;
353}
354
355STATIC int
356xfs_fssetdm_by_handle(
357 struct file *parfilp,
358 void __user *arg)
359{
360 int error;
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
363 struct dentry *dentry;
364
365 if (!capable(CAP_MKNOD))
366 return -XFS_ERROR(EPERM);
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 return -XFS_ERROR(EFAULT);
369
370 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
371 if (IS_ERR(dentry))
372 return PTR_ERR(dentry);
373
374 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
375 error = -XFS_ERROR(EPERM);
376 goto out;
377 }
378
379 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
380 error = -XFS_ERROR(EFAULT);
381 goto out;
382 }
383
384 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
385 fsd.fsd_dmstate);
386
387 out:
388 dput(dentry);
389 return error;
390}
391
392STATIC int
393xfs_attrlist_by_handle(
394 struct file *parfilp,
395 void __user *arg)
396{
397 int error = -ENOMEM;
398 attrlist_cursor_kern_t *cursor;
399 xfs_fsop_attrlist_handlereq_t al_hreq;
400 struct dentry *dentry;
401 char *kbuf;
402
403 if (!capable(CAP_SYS_ADMIN))
404 return -XFS_ERROR(EPERM);
405 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
406 return -XFS_ERROR(EFAULT);
407 if (al_hreq.buflen > XATTR_LIST_MAX)
408 return -XFS_ERROR(EINVAL);
409
410 /*
411 * Reject flags, only allow namespaces.
412 */
413 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
414 return -XFS_ERROR(EINVAL);
415
416 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
417 if (IS_ERR(dentry))
418 return PTR_ERR(dentry);
419
420 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
421 if (!kbuf)
422 goto out_dput;
423
424 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
425 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
426 al_hreq.flags, cursor);
427 if (error)
428 goto out_kfree;
429
430 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
431 error = -EFAULT;
432
433 out_kfree:
434 kfree(kbuf);
435 out_dput:
436 dput(dentry);
437 return error;
438}
439
440int
441xfs_attrmulti_attr_get(
442 struct inode *inode,
443 unsigned char *name,
444 unsigned char __user *ubuf,
445 __uint32_t *len,
446 __uint32_t flags)
447{
448 unsigned char *kbuf;
449 int error = EFAULT;
450
451 if (*len > XATTR_SIZE_MAX)
452 return EINVAL;
453 kbuf = kmalloc(*len, GFP_KERNEL);
454 if (!kbuf)
455 return ENOMEM;
456
457 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
458 if (error)
459 goto out_kfree;
460
461 if (copy_to_user(ubuf, kbuf, *len))
462 error = EFAULT;
463
464 out_kfree:
465 kfree(kbuf);
466 return error;
467}
468
469int
470xfs_attrmulti_attr_set(
471 struct inode *inode,
472 unsigned char *name,
473 const unsigned char __user *ubuf,
474 __uint32_t len,
475 __uint32_t flags)
476{
477 unsigned char *kbuf;
478 int error = EFAULT;
479
480 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
481 return EPERM;
482 if (len > XATTR_SIZE_MAX)
483 return EINVAL;
484
485 kbuf = memdup_user(ubuf, len);
486 if (IS_ERR(kbuf))
487 return PTR_ERR(kbuf);
488
489 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
490
491 return error;
492}
493
494int
495xfs_attrmulti_attr_remove(
496 struct inode *inode,
497 unsigned char *name,
498 __uint32_t flags)
499{
500 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
501 return EPERM;
502 return xfs_attr_remove(XFS_I(inode), name, flags);
503}
504
505STATIC int
506xfs_attrmulti_by_handle(
507 struct file *parfilp,
508 void __user *arg)
509{
510 int error;
511 xfs_attr_multiop_t *ops;
512 xfs_fsop_attrmulti_handlereq_t am_hreq;
513 struct dentry *dentry;
514 unsigned int i, size;
515 unsigned char *attr_name;
516
517 if (!capable(CAP_SYS_ADMIN))
518 return -XFS_ERROR(EPERM);
519 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
520 return -XFS_ERROR(EFAULT);
521
522 /* overflow check */
523 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
524 return -E2BIG;
525
526 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
527 if (IS_ERR(dentry))
528 return PTR_ERR(dentry);
529
530 error = E2BIG;
531 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
532 if (!size || size > 16 * PAGE_SIZE)
533 goto out_dput;
534
535 ops = memdup_user(am_hreq.ops, size);
536 if (IS_ERR(ops)) {
537 error = PTR_ERR(ops);
538 goto out_dput;
539 }
540
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 dentry->d_inode, 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(parfilp->f_path.mnt);
563 if (ops[i].am_error)
564 break;
565 ops[i].am_error = xfs_attrmulti_attr_set(
566 dentry->d_inode, attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
568 ops[i].am_flags);
569 mnt_drop_write(parfilp->f_path.mnt);
570 break;
571 case ATTR_OP_REMOVE:
572 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
573 if (ops[i].am_error)
574 break;
575 ops[i].am_error = xfs_attrmulti_attr_remove(
576 dentry->d_inode, attr_name,
577 ops[i].am_flags);
578 mnt_drop_write(parfilp->f_path.mnt);
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 = XFS_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
596int
597xfs_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 int attr_flags = 0;
606 int error;
607
608 /*
609 * Only allow the sys admin to reserve space unless
610 * unwritten extents are enabled.
611 */
612 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
613 !capable(CAP_SYS_ADMIN))
614 return -XFS_ERROR(EPERM);
615
616 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
617 return -XFS_ERROR(EPERM);
618
619 if (!(filp->f_mode & FMODE_WRITE))
620 return -XFS_ERROR(EBADF);
621
622 if (!S_ISREG(inode->i_mode))
623 return -XFS_ERROR(EINVAL);
624
625 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
626 attr_flags |= XFS_ATTR_NONBLOCK;
627
628 if (filp->f_flags & O_DSYNC)
629 attr_flags |= XFS_ATTR_SYNC;
630
631 if (ioflags & IO_INVIS)
632 attr_flags |= XFS_ATTR_DMI;
633
634 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
635 return -error;
636}
637
638STATIC int
639xfs_ioc_bulkstat(
640 xfs_mount_t *mp,
641 unsigned int cmd,
642 void __user *arg)
643{
644 xfs_fsop_bulkreq_t bulkreq;
645 int count; /* # of records returned */
646 xfs_ino_t inlast; /* last inode number */
647 int done;
648 int error;
649
650 /* done = 1 if there are more stats to get and if bulkstat */
651 /* should be called again (unused here, but used in dmapi) */
652
653 if (!capable(CAP_SYS_ADMIN))
654 return -EPERM;
655
656 if (XFS_FORCED_SHUTDOWN(mp))
657 return -XFS_ERROR(EIO);
658
659 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
660 return -XFS_ERROR(EFAULT);
661
662 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
663 return -XFS_ERROR(EFAULT);
664
665 if ((count = bulkreq.icount) <= 0)
666 return -XFS_ERROR(EINVAL);
667
668 if (bulkreq.ubuffer == NULL)
669 return -XFS_ERROR(EINVAL);
670
671 if (cmd == XFS_IOC_FSINUMBERS)
672 error = xfs_inumbers(mp, &inlast, &count,
673 bulkreq.ubuffer, xfs_inumbers_fmt);
674 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
675 error = xfs_bulkstat_single(mp, &inlast,
676 bulkreq.ubuffer, &done);
677 else /* XFS_IOC_FSBULKSTAT */
678 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
679 sizeof(xfs_bstat_t), bulkreq.ubuffer,
680 &done);
681
682 if (error)
683 return -error;
684
685 if (bulkreq.ocount != NULL) {
686 if (copy_to_user(bulkreq.lastip, &inlast,
687 sizeof(xfs_ino_t)))
688 return -XFS_ERROR(EFAULT);
689
690 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
691 return -XFS_ERROR(EFAULT);
692 }
693
694 return 0;
695}
696
697STATIC int
698xfs_ioc_fsgeometry_v1(
699 xfs_mount_t *mp,
700 void __user *arg)
701{
702 xfs_fsop_geom_t fsgeo;
703 int error;
704
705 error = xfs_fs_geometry(mp, &fsgeo, 3);
706 if (error)
707 return -error;
708
709 /*
710 * Caller should have passed an argument of type
711 * xfs_fsop_geom_v1_t. This is a proper subset of the
712 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
713 */
714 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
715 return -XFS_ERROR(EFAULT);
716 return 0;
717}
718
719STATIC int
720xfs_ioc_fsgeometry(
721 xfs_mount_t *mp,
722 void __user *arg)
723{
724 xfs_fsop_geom_t fsgeo;
725 int error;
726
727 error = xfs_fs_geometry(mp, &fsgeo, 4);
728 if (error)
729 return -error;
730
731 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
732 return -XFS_ERROR(EFAULT);
733 return 0;
734}
735
736/*
737 * Linux extended inode flags interface.
738 */
739
740STATIC unsigned int
741xfs_merge_ioc_xflags(
742 unsigned int flags,
743 unsigned int start)
744{
745 unsigned int xflags = start;
746
747 if (flags & FS_IMMUTABLE_FL)
748 xflags |= XFS_XFLAG_IMMUTABLE;
749 else
750 xflags &= ~XFS_XFLAG_IMMUTABLE;
751 if (flags & FS_APPEND_FL)
752 xflags |= XFS_XFLAG_APPEND;
753 else
754 xflags &= ~XFS_XFLAG_APPEND;
755 if (flags & FS_SYNC_FL)
756 xflags |= XFS_XFLAG_SYNC;
757 else
758 xflags &= ~XFS_XFLAG_SYNC;
759 if (flags & FS_NOATIME_FL)
760 xflags |= XFS_XFLAG_NOATIME;
761 else
762 xflags &= ~XFS_XFLAG_NOATIME;
763 if (flags & FS_NODUMP_FL)
764 xflags |= XFS_XFLAG_NODUMP;
765 else
766 xflags &= ~XFS_XFLAG_NODUMP;
767
768 return xflags;
769}
770
771STATIC unsigned int
772xfs_di2lxflags(
773 __uint16_t di_flags)
774{
775 unsigned int flags = 0;
776
777 if (di_flags & XFS_DIFLAG_IMMUTABLE)
778 flags |= FS_IMMUTABLE_FL;
779 if (di_flags & XFS_DIFLAG_APPEND)
780 flags |= FS_APPEND_FL;
781 if (di_flags & XFS_DIFLAG_SYNC)
782 flags |= FS_SYNC_FL;
783 if (di_flags & XFS_DIFLAG_NOATIME)
784 flags |= FS_NOATIME_FL;
785 if (di_flags & XFS_DIFLAG_NODUMP)
786 flags |= FS_NODUMP_FL;
787 return flags;
788}
789
790STATIC int
791xfs_ioc_fsgetxattr(
792 xfs_inode_t *ip,
793 int attr,
794 void __user *arg)
795{
796 struct fsxattr fa;
797
798 memset(&fa, 0, sizeof(struct fsxattr));
799
800 xfs_ilock(ip, XFS_ILOCK_SHARED);
801 fa.fsx_xflags = xfs_ip2xflags(ip);
802 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
803 fa.fsx_projid = xfs_get_projid(ip);
804
805 if (attr) {
806 if (ip->i_afp) {
807 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
808 fa.fsx_nextents = ip->i_afp->if_bytes /
809 sizeof(xfs_bmbt_rec_t);
810 else
811 fa.fsx_nextents = ip->i_d.di_anextents;
812 } else
813 fa.fsx_nextents = 0;
814 } else {
815 if (ip->i_df.if_flags & XFS_IFEXTENTS)
816 fa.fsx_nextents = ip->i_df.if_bytes /
817 sizeof(xfs_bmbt_rec_t);
818 else
819 fa.fsx_nextents = ip->i_d.di_nextents;
820 }
821 xfs_iunlock(ip, XFS_ILOCK_SHARED);
822
823 if (copy_to_user(arg, &fa, sizeof(fa)))
824 return -EFAULT;
825 return 0;
826}
827
828STATIC void
829xfs_set_diflags(
830 struct xfs_inode *ip,
831 unsigned int xflags)
832{
833 unsigned int di_flags;
834
835 /* can't set PREALLOC this way, just preserve it */
836 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
837 if (xflags & XFS_XFLAG_IMMUTABLE)
838 di_flags |= XFS_DIFLAG_IMMUTABLE;
839 if (xflags & XFS_XFLAG_APPEND)
840 di_flags |= XFS_DIFLAG_APPEND;
841 if (xflags & XFS_XFLAG_SYNC)
842 di_flags |= XFS_DIFLAG_SYNC;
843 if (xflags & XFS_XFLAG_NOATIME)
844 di_flags |= XFS_DIFLAG_NOATIME;
845 if (xflags & XFS_XFLAG_NODUMP)
846 di_flags |= XFS_DIFLAG_NODUMP;
847 if (xflags & XFS_XFLAG_PROJINHERIT)
848 di_flags |= XFS_DIFLAG_PROJINHERIT;
849 if (xflags & XFS_XFLAG_NODEFRAG)
850 di_flags |= XFS_DIFLAG_NODEFRAG;
851 if (xflags & XFS_XFLAG_FILESTREAM)
852 di_flags |= XFS_DIFLAG_FILESTREAM;
853 if (S_ISDIR(ip->i_d.di_mode)) {
854 if (xflags & XFS_XFLAG_RTINHERIT)
855 di_flags |= XFS_DIFLAG_RTINHERIT;
856 if (xflags & XFS_XFLAG_NOSYMLINKS)
857 di_flags |= XFS_DIFLAG_NOSYMLINKS;
858 if (xflags & XFS_XFLAG_EXTSZINHERIT)
859 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
860 } else if (S_ISREG(ip->i_d.di_mode)) {
861 if (xflags & XFS_XFLAG_REALTIME)
862 di_flags |= XFS_DIFLAG_REALTIME;
863 if (xflags & XFS_XFLAG_EXTSIZE)
864 di_flags |= XFS_DIFLAG_EXTSIZE;
865 }
866
867 ip->i_d.di_flags = di_flags;
868}
869
870STATIC void
871xfs_diflags_to_linux(
872 struct xfs_inode *ip)
873{
874 struct inode *inode = VFS_I(ip);
875 unsigned int xflags = xfs_ip2xflags(ip);
876
877 if (xflags & XFS_XFLAG_IMMUTABLE)
878 inode->i_flags |= S_IMMUTABLE;
879 else
880 inode->i_flags &= ~S_IMMUTABLE;
881 if (xflags & XFS_XFLAG_APPEND)
882 inode->i_flags |= S_APPEND;
883 else
884 inode->i_flags &= ~S_APPEND;
885 if (xflags & XFS_XFLAG_SYNC)
886 inode->i_flags |= S_SYNC;
887 else
888 inode->i_flags &= ~S_SYNC;
889 if (xflags & XFS_XFLAG_NOATIME)
890 inode->i_flags |= S_NOATIME;
891 else
892 inode->i_flags &= ~S_NOATIME;
893}
894
895#define FSX_PROJID 1
896#define FSX_EXTSIZE 2
897#define FSX_XFLAGS 4
898#define FSX_NONBLOCK 8
899
900STATIC int
901xfs_ioctl_setattr(
902 xfs_inode_t *ip,
903 struct fsxattr *fa,
904 int mask)
905{
906 struct xfs_mount *mp = ip->i_mount;
907 struct xfs_trans *tp;
908 unsigned int lock_flags = 0;
909 struct xfs_dquot *udqp = NULL;
910 struct xfs_dquot *gdqp = NULL;
911 struct xfs_dquot *olddquot = NULL;
912 int code;
913
914 trace_xfs_ioctl_setattr(ip);
915
916 if (mp->m_flags & XFS_MOUNT_RDONLY)
917 return XFS_ERROR(EROFS);
918 if (XFS_FORCED_SHUTDOWN(mp))
919 return XFS_ERROR(EIO);
920
921 /*
922 * Disallow 32bit project ids when projid32bit feature is not enabled.
923 */
924 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
925 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
926 return XFS_ERROR(EINVAL);
927
928 /*
929 * If disk quotas is on, we make sure that the dquots do exist on disk,
930 * before we start any other transactions. Trying to do this later
931 * is messy. We don't care to take a readlock to look at the ids
932 * in inode here, because we can't hold it across the trans_reserve.
933 * If the IDs do change before we take the ilock, we're covered
934 * because the i_*dquot fields will get updated anyway.
935 */
936 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
937 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
938 ip->i_d.di_gid, fa->fsx_projid,
939 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
940 if (code)
941 return code;
942 }
943
944 /*
945 * For the other attributes, we acquire the inode lock and
946 * first do an error checking pass.
947 */
948 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
949 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
950 if (code)
951 goto error_return;
952
953 lock_flags = XFS_ILOCK_EXCL;
954 xfs_ilock(ip, lock_flags);
955
956 /*
957 * CAP_FOWNER overrides the following restrictions:
958 *
959 * The user ID of the calling process must be equal
960 * to the file owner ID, except in cases where the
961 * CAP_FSETID capability is applicable.
962 */
963 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
964 code = XFS_ERROR(EPERM);
965 goto error_return;
966 }
967
968 /*
969 * Do a quota reservation only if projid is actually going to change.
970 */
971 if (mask & FSX_PROJID) {
972 if (XFS_IS_QUOTA_RUNNING(mp) &&
973 XFS_IS_PQUOTA_ON(mp) &&
974 xfs_get_projid(ip) != fa->fsx_projid) {
975 ASSERT(tp);
976 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
977 capable(CAP_FOWNER) ?
978 XFS_QMOPT_FORCE_RES : 0);
979 if (code) /* out of quota */
980 goto error_return;
981 }
982 }
983
984 if (mask & FSX_EXTSIZE) {
985 /*
986 * Can't change extent size if any extents are allocated.
987 */
988 if (ip->i_d.di_nextents &&
989 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
990 fa->fsx_extsize)) {
991 code = XFS_ERROR(EINVAL); /* EFBIG? */
992 goto error_return;
993 }
994
995 /*
996 * Extent size must be a multiple of the appropriate block
997 * size, if set at all. It must also be smaller than the
998 * maximum extent size supported by the filesystem.
999 *
1000 * Also, for non-realtime files, limit the extent size hint to
1001 * half the size of the AGs in the filesystem so alignment
1002 * doesn't result in extents larger than an AG.
1003 */
1004 if (fa->fsx_extsize != 0) {
1005 xfs_extlen_t size;
1006 xfs_fsblock_t extsize_fsb;
1007
1008 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1009 if (extsize_fsb > MAXEXTLEN) {
1010 code = XFS_ERROR(EINVAL);
1011 goto error_return;
1012 }
1013
1014 if (XFS_IS_REALTIME_INODE(ip) ||
1015 ((mask & FSX_XFLAGS) &&
1016 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1017 size = mp->m_sb.sb_rextsize <<
1018 mp->m_sb.sb_blocklog;
1019 } else {
1020 size = mp->m_sb.sb_blocksize;
1021 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1022 code = XFS_ERROR(EINVAL);
1023 goto error_return;
1024 }
1025 }
1026
1027 if (fa->fsx_extsize % size) {
1028 code = XFS_ERROR(EINVAL);
1029 goto error_return;
1030 }
1031 }
1032 }
1033
1034
1035 if (mask & FSX_XFLAGS) {
1036 /*
1037 * Can't change realtime flag if any extents are allocated.
1038 */
1039 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1040 (XFS_IS_REALTIME_INODE(ip)) !=
1041 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1042 code = XFS_ERROR(EINVAL); /* EFBIG? */
1043 goto error_return;
1044 }
1045
1046 /*
1047 * If realtime flag is set then must have realtime data.
1048 */
1049 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1050 if ((mp->m_sb.sb_rblocks == 0) ||
1051 (mp->m_sb.sb_rextsize == 0) ||
1052 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1053 code = XFS_ERROR(EINVAL);
1054 goto error_return;
1055 }
1056 }
1057
1058 /*
1059 * Can't modify an immutable/append-only file unless
1060 * we have appropriate permission.
1061 */
1062 if ((ip->i_d.di_flags &
1063 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1064 (fa->fsx_xflags &
1065 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1066 !capable(CAP_LINUX_IMMUTABLE)) {
1067 code = XFS_ERROR(EPERM);
1068 goto error_return;
1069 }
1070 }
1071
1072 xfs_trans_ijoin(tp, ip);
1073
1074 /*
1075 * Change file ownership. Must be the owner or privileged.
1076 */
1077 if (mask & FSX_PROJID) {
1078 /*
1079 * CAP_FSETID overrides the following restrictions:
1080 *
1081 * The set-user-ID and set-group-ID bits of a file will be
1082 * cleared upon successful return from chown()
1083 */
1084 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1085 !capable(CAP_FSETID))
1086 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1087
1088 /*
1089 * Change the ownerships and register quota modifications
1090 * in the transaction.
1091 */
1092 if (xfs_get_projid(ip) != fa->fsx_projid) {
1093 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1094 olddquot = xfs_qm_vop_chown(tp, ip,
1095 &ip->i_gdquot, gdqp);
1096 }
1097 xfs_set_projid(ip, fa->fsx_projid);
1098
1099 /*
1100 * We may have to rev the inode as well as
1101 * the superblock version number since projids didn't
1102 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1103 */
1104 if (ip->i_d.di_version == 1)
1105 xfs_bump_ino_vers2(tp, ip);
1106 }
1107
1108 }
1109
1110 if (mask & FSX_EXTSIZE)
1111 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1112 if (mask & FSX_XFLAGS) {
1113 xfs_set_diflags(ip, fa->fsx_xflags);
1114 xfs_diflags_to_linux(ip);
1115 }
1116
1117 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1118 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1119
1120 XFS_STATS_INC(xs_ig_attrchg);
1121
1122 /*
1123 * If this is a synchronous mount, make sure that the
1124 * transaction goes to disk before returning to the user.
1125 * This is slightly sub-optimal in that truncates require
1126 * two sync transactions instead of one for wsync filesystems.
1127 * One for the truncate and one for the timestamps since we
1128 * don't want to change the timestamps unless we're sure the
1129 * truncate worked. Truncates are less than 1% of the laddis
1130 * mix so this probably isn't worth the trouble to optimize.
1131 */
1132 if (mp->m_flags & XFS_MOUNT_WSYNC)
1133 xfs_trans_set_sync(tp);
1134 code = xfs_trans_commit(tp, 0);
1135 xfs_iunlock(ip, lock_flags);
1136
1137 /*
1138 * Release any dquot(s) the inode had kept before chown.
1139 */
1140 xfs_qm_dqrele(olddquot);
1141 xfs_qm_dqrele(udqp);
1142 xfs_qm_dqrele(gdqp);
1143
1144 return code;
1145
1146 error_return:
1147 xfs_qm_dqrele(udqp);
1148 xfs_qm_dqrele(gdqp);
1149 xfs_trans_cancel(tp, 0);
1150 if (lock_flags)
1151 xfs_iunlock(ip, lock_flags);
1152 return code;
1153}
1154
1155STATIC int
1156xfs_ioc_fssetxattr(
1157 xfs_inode_t *ip,
1158 struct file *filp,
1159 void __user *arg)
1160{
1161 struct fsxattr fa;
1162 unsigned int mask;
1163
1164 if (copy_from_user(&fa, arg, sizeof(fa)))
1165 return -EFAULT;
1166
1167 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1168 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1169 mask |= FSX_NONBLOCK;
1170
1171 return -xfs_ioctl_setattr(ip, &fa, mask);
1172}
1173
1174STATIC int
1175xfs_ioc_getxflags(
1176 xfs_inode_t *ip,
1177 void __user *arg)
1178{
1179 unsigned int flags;
1180
1181 flags = xfs_di2lxflags(ip->i_d.di_flags);
1182 if (copy_to_user(arg, &flags, sizeof(flags)))
1183 return -EFAULT;
1184 return 0;
1185}
1186
1187STATIC int
1188xfs_ioc_setxflags(
1189 xfs_inode_t *ip,
1190 struct file *filp,
1191 void __user *arg)
1192{
1193 struct fsxattr fa;
1194 unsigned int flags;
1195 unsigned int mask;
1196
1197 if (copy_from_user(&flags, arg, sizeof(flags)))
1198 return -EFAULT;
1199
1200 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1201 FS_NOATIME_FL | FS_NODUMP_FL | \
1202 FS_SYNC_FL))
1203 return -EOPNOTSUPP;
1204
1205 mask = FSX_XFLAGS;
1206 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1207 mask |= FSX_NONBLOCK;
1208 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1209
1210 return -xfs_ioctl_setattr(ip, &fa, mask);
1211}
1212
1213STATIC int
1214xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1215{
1216 struct getbmap __user *base = *ap;
1217
1218 /* copy only getbmap portion (not getbmapx) */
1219 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1220 return XFS_ERROR(EFAULT);
1221
1222 *ap += sizeof(struct getbmap);
1223 return 0;
1224}
1225
1226STATIC int
1227xfs_ioc_getbmap(
1228 struct xfs_inode *ip,
1229 int ioflags,
1230 unsigned int cmd,
1231 void __user *arg)
1232{
1233 struct getbmapx bmx;
1234 int error;
1235
1236 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1237 return -XFS_ERROR(EFAULT);
1238
1239 if (bmx.bmv_count < 2)
1240 return -XFS_ERROR(EINVAL);
1241
1242 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1243 if (ioflags & IO_INVIS)
1244 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1245
1246 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1247 (struct getbmap *)arg+1);
1248 if (error)
1249 return -error;
1250
1251 /* copy back header - only size of getbmap */
1252 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1253 return -XFS_ERROR(EFAULT);
1254 return 0;
1255}
1256
1257STATIC int
1258xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1259{
1260 struct getbmapx __user *base = *ap;
1261
1262 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1263 return XFS_ERROR(EFAULT);
1264
1265 *ap += sizeof(struct getbmapx);
1266 return 0;
1267}
1268
1269STATIC int
1270xfs_ioc_getbmapx(
1271 struct xfs_inode *ip,
1272 void __user *arg)
1273{
1274 struct getbmapx bmx;
1275 int error;
1276
1277 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1278 return -XFS_ERROR(EFAULT);
1279
1280 if (bmx.bmv_count < 2)
1281 return -XFS_ERROR(EINVAL);
1282
1283 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1284 return -XFS_ERROR(EINVAL);
1285
1286 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1287 (struct getbmapx *)arg+1);
1288 if (error)
1289 return -error;
1290
1291 /* copy back header */
1292 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1293 return -XFS_ERROR(EFAULT);
1294
1295 return 0;
1296}
1297
1298/*
1299 * Note: some of the ioctl's return positive numbers as a
1300 * byte count indicating success, such as readlink_by_handle.
1301 * So we don't "sign flip" like most other routines. This means
1302 * true errors need to be returned as a negative value.
1303 */
1304long
1305xfs_file_ioctl(
1306 struct file *filp,
1307 unsigned int cmd,
1308 unsigned long p)
1309{
1310 struct inode *inode = filp->f_path.dentry->d_inode;
1311 struct xfs_inode *ip = XFS_I(inode);
1312 struct xfs_mount *mp = ip->i_mount;
1313 void __user *arg = (void __user *)p;
1314 int ioflags = 0;
1315 int error;
1316
1317 if (filp->f_mode & FMODE_NOCMTIME)
1318 ioflags |= IO_INVIS;
1319
1320 trace_xfs_file_ioctl(ip);
1321
1322 switch (cmd) {
1323 case FITRIM:
1324 return xfs_ioc_trim(mp, arg);
1325 case XFS_IOC_ALLOCSP:
1326 case XFS_IOC_FREESP:
1327 case XFS_IOC_RESVSP:
1328 case XFS_IOC_UNRESVSP:
1329 case XFS_IOC_ALLOCSP64:
1330 case XFS_IOC_FREESP64:
1331 case XFS_IOC_RESVSP64:
1332 case XFS_IOC_UNRESVSP64:
1333 case XFS_IOC_ZERO_RANGE: {
1334 xfs_flock64_t bf;
1335
1336 if (copy_from_user(&bf, arg, sizeof(bf)))
1337 return -XFS_ERROR(EFAULT);
1338 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1339 }
1340 case XFS_IOC_DIOINFO: {
1341 struct dioattr da;
1342 xfs_buftarg_t *target =
1343 XFS_IS_REALTIME_INODE(ip) ?
1344 mp->m_rtdev_targp : mp->m_ddev_targp;
1345
1346 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1347 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1348
1349 if (copy_to_user(arg, &da, sizeof(da)))
1350 return -XFS_ERROR(EFAULT);
1351 return 0;
1352 }
1353
1354 case XFS_IOC_FSBULKSTAT_SINGLE:
1355 case XFS_IOC_FSBULKSTAT:
1356 case XFS_IOC_FSINUMBERS:
1357 return xfs_ioc_bulkstat(mp, cmd, arg);
1358
1359 case XFS_IOC_FSGEOMETRY_V1:
1360 return xfs_ioc_fsgeometry_v1(mp, arg);
1361
1362 case XFS_IOC_FSGEOMETRY:
1363 return xfs_ioc_fsgeometry(mp, arg);
1364
1365 case XFS_IOC_GETVERSION:
1366 return put_user(inode->i_generation, (int __user *)arg);
1367
1368 case XFS_IOC_FSGETXATTR:
1369 return xfs_ioc_fsgetxattr(ip, 0, arg);
1370 case XFS_IOC_FSGETXATTRA:
1371 return xfs_ioc_fsgetxattr(ip, 1, arg);
1372 case XFS_IOC_FSSETXATTR:
1373 return xfs_ioc_fssetxattr(ip, filp, arg);
1374 case XFS_IOC_GETXFLAGS:
1375 return xfs_ioc_getxflags(ip, arg);
1376 case XFS_IOC_SETXFLAGS:
1377 return xfs_ioc_setxflags(ip, filp, arg);
1378
1379 case XFS_IOC_FSSETDM: {
1380 struct fsdmidata dmi;
1381
1382 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1383 return -XFS_ERROR(EFAULT);
1384
1385 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1386 dmi.fsd_dmstate);
1387 return -error;
1388 }
1389
1390 case XFS_IOC_GETBMAP:
1391 case XFS_IOC_GETBMAPA:
1392 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1393
1394 case XFS_IOC_GETBMAPX:
1395 return xfs_ioc_getbmapx(ip, arg);
1396
1397 case XFS_IOC_FD_TO_HANDLE:
1398 case XFS_IOC_PATH_TO_HANDLE:
1399 case XFS_IOC_PATH_TO_FSHANDLE: {
1400 xfs_fsop_handlereq_t hreq;
1401
1402 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1403 return -XFS_ERROR(EFAULT);
1404 return xfs_find_handle(cmd, &hreq);
1405 }
1406 case XFS_IOC_OPEN_BY_HANDLE: {
1407 xfs_fsop_handlereq_t hreq;
1408
1409 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1410 return -XFS_ERROR(EFAULT);
1411 return xfs_open_by_handle(filp, &hreq);
1412 }
1413 case XFS_IOC_FSSETDM_BY_HANDLE:
1414 return xfs_fssetdm_by_handle(filp, arg);
1415
1416 case XFS_IOC_READLINK_BY_HANDLE: {
1417 xfs_fsop_handlereq_t hreq;
1418
1419 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1420 return -XFS_ERROR(EFAULT);
1421 return xfs_readlink_by_handle(filp, &hreq);
1422 }
1423 case XFS_IOC_ATTRLIST_BY_HANDLE:
1424 return xfs_attrlist_by_handle(filp, arg);
1425
1426 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1427 return xfs_attrmulti_by_handle(filp, arg);
1428
1429 case XFS_IOC_SWAPEXT: {
1430 struct xfs_swapext sxp;
1431
1432 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1433 return -XFS_ERROR(EFAULT);
1434 error = xfs_swapext(&sxp);
1435 return -error;
1436 }
1437
1438 case XFS_IOC_FSCOUNTS: {
1439 xfs_fsop_counts_t out;
1440
1441 error = xfs_fs_counts(mp, &out);
1442 if (error)
1443 return -error;
1444
1445 if (copy_to_user(arg, &out, sizeof(out)))
1446 return -XFS_ERROR(EFAULT);
1447 return 0;
1448 }
1449
1450 case XFS_IOC_SET_RESBLKS: {
1451 xfs_fsop_resblks_t inout;
1452 __uint64_t in;
1453
1454 if (!capable(CAP_SYS_ADMIN))
1455 return -EPERM;
1456
1457 if (mp->m_flags & XFS_MOUNT_RDONLY)
1458 return -XFS_ERROR(EROFS);
1459
1460 if (copy_from_user(&inout, arg, sizeof(inout)))
1461 return -XFS_ERROR(EFAULT);
1462
1463 /* input parameter is passed in resblks field of structure */
1464 in = inout.resblks;
1465 error = xfs_reserve_blocks(mp, &in, &inout);
1466 if (error)
1467 return -error;
1468
1469 if (copy_to_user(arg, &inout, sizeof(inout)))
1470 return -XFS_ERROR(EFAULT);
1471 return 0;
1472 }
1473
1474 case XFS_IOC_GET_RESBLKS: {
1475 xfs_fsop_resblks_t out;
1476
1477 if (!capable(CAP_SYS_ADMIN))
1478 return -EPERM;
1479
1480 error = xfs_reserve_blocks(mp, NULL, &out);
1481 if (error)
1482 return -error;
1483
1484 if (copy_to_user(arg, &out, sizeof(out)))
1485 return -XFS_ERROR(EFAULT);
1486
1487 return 0;
1488 }
1489
1490 case XFS_IOC_FSGROWFSDATA: {
1491 xfs_growfs_data_t in;
1492
1493 if (copy_from_user(&in, arg, sizeof(in)))
1494 return -XFS_ERROR(EFAULT);
1495
1496 error = xfs_growfs_data(mp, &in);
1497 return -error;
1498 }
1499
1500 case XFS_IOC_FSGROWFSLOG: {
1501 xfs_growfs_log_t in;
1502
1503 if (copy_from_user(&in, arg, sizeof(in)))
1504 return -XFS_ERROR(EFAULT);
1505
1506 error = xfs_growfs_log(mp, &in);
1507 return -error;
1508 }
1509
1510 case XFS_IOC_FSGROWFSRT: {
1511 xfs_growfs_rt_t in;
1512
1513 if (copy_from_user(&in, arg, sizeof(in)))
1514 return -XFS_ERROR(EFAULT);
1515
1516 error = xfs_growfs_rt(mp, &in);
1517 return -error;
1518 }
1519
1520 case XFS_IOC_GOINGDOWN: {
1521 __uint32_t in;
1522
1523 if (!capable(CAP_SYS_ADMIN))
1524 return -EPERM;
1525
1526 if (get_user(in, (__uint32_t __user *)arg))
1527 return -XFS_ERROR(EFAULT);
1528
1529 error = xfs_fs_goingdown(mp, in);
1530 return -error;
1531 }
1532
1533 case XFS_IOC_ERROR_INJECTION: {
1534 xfs_error_injection_t in;
1535
1536 if (!capable(CAP_SYS_ADMIN))
1537 return -EPERM;
1538
1539 if (copy_from_user(&in, arg, sizeof(in)))
1540 return -XFS_ERROR(EFAULT);
1541
1542 error = xfs_errortag_add(in.errtag, mp);
1543 return -error;
1544 }
1545
1546 case XFS_IOC_ERROR_CLEARALL:
1547 if (!capable(CAP_SYS_ADMIN))
1548 return -EPERM;
1549
1550 error = xfs_errortag_clearall(mp, 1);
1551 return -error;
1552
1553 default:
1554 return -ENOTTY;
1555 }
1556}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_inode.h"
14#include "xfs_rtalloc.h"
15#include "xfs_iwalk.h"
16#include "xfs_itable.h"
17#include "xfs_error.h"
18#include "xfs_da_format.h"
19#include "xfs_da_btree.h"
20#include "xfs_attr.h"
21#include "xfs_bmap.h"
22#include "xfs_bmap_util.h"
23#include "xfs_fsops.h"
24#include "xfs_discard.h"
25#include "xfs_quota.h"
26#include "xfs_trace.h"
27#include "xfs_icache.h"
28#include "xfs_trans.h"
29#include "xfs_btree.h"
30#include <linux/fsmap.h>
31#include "xfs_fsmap.h"
32#include "scrub/xfs_scrub.h"
33#include "xfs_sb.h"
34#include "xfs_ag.h"
35#include "xfs_health.h"
36#include "xfs_reflink.h"
37#include "xfs_ioctl.h"
38#include "xfs_xattr.h"
39#include "xfs_rtbitmap.h"
40#include "xfs_file.h"
41#include "xfs_exchrange.h"
42#include "xfs_handle.h"
43#include "xfs_rtgroup.h"
44
45#include <linux/mount.h>
46#include <linux/fileattr.h>
47
48/* Return 0 on success or positive error */
49int
50xfs_fsbulkstat_one_fmt(
51 struct xfs_ibulk *breq,
52 const struct xfs_bulkstat *bstat)
53{
54 struct xfs_bstat bs1;
55
56 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
57 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
58 return -EFAULT;
59 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
60}
61
62int
63xfs_fsinumbers_fmt(
64 struct xfs_ibulk *breq,
65 const struct xfs_inumbers *igrp)
66{
67 struct xfs_inogrp ig1;
68
69 xfs_inumbers_to_inogrp(&ig1, igrp);
70 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
71 return -EFAULT;
72 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
73}
74
75STATIC int
76xfs_ioc_fsbulkstat(
77 struct file *file,
78 unsigned int cmd,
79 void __user *arg)
80{
81 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
82 struct xfs_fsop_bulkreq bulkreq;
83 struct xfs_ibulk breq = {
84 .mp = mp,
85 .idmap = file_mnt_idmap(file),
86 .ocount = 0,
87 };
88 xfs_ino_t lastino;
89 int error;
90
91 /* done = 1 if there are more stats to get and if bulkstat */
92 /* should be called again (unused here, but used in dmapi) */
93
94 if (!capable(CAP_SYS_ADMIN))
95 return -EPERM;
96
97 if (xfs_is_shutdown(mp))
98 return -EIO;
99
100 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
101 return -EFAULT;
102
103 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
104 return -EFAULT;
105
106 if (bulkreq.icount <= 0)
107 return -EINVAL;
108
109 if (bulkreq.ubuffer == NULL)
110 return -EINVAL;
111
112 breq.ubuffer = bulkreq.ubuffer;
113 breq.icount = bulkreq.icount;
114
115 /*
116 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
117 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
118 * that *lastip contains either zero or the number of the last inode to
119 * be examined by the previous call and return results starting with
120 * the next inode after that. The new bulk request back end functions
121 * take the inode to start with, so we have to compute the startino
122 * parameter from lastino to maintain correct function. lastino == 0
123 * is a special case because it has traditionally meant "first inode
124 * in filesystem".
125 */
126 if (cmd == XFS_IOC_FSINUMBERS) {
127 breq.startino = lastino ? lastino + 1 : 0;
128 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
129 lastino = breq.startino - 1;
130 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
131 breq.startino = lastino;
132 breq.icount = 1;
133 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
134 } else { /* XFS_IOC_FSBULKSTAT */
135 breq.startino = lastino ? lastino + 1 : 0;
136 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
137 lastino = breq.startino - 1;
138 }
139
140 if (error)
141 return error;
142
143 if (bulkreq.lastip != NULL &&
144 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
145 return -EFAULT;
146
147 if (bulkreq.ocount != NULL &&
148 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
149 return -EFAULT;
150
151 return 0;
152}
153
154/* Return 0 on success or positive error */
155static int
156xfs_bulkstat_fmt(
157 struct xfs_ibulk *breq,
158 const struct xfs_bulkstat *bstat)
159{
160 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
161 return -EFAULT;
162 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
163}
164
165/*
166 * Check the incoming bulk request @hdr from userspace and initialize the
167 * internal @breq bulk request appropriately. Returns 0 if the bulk request
168 * should proceed; -ECANCELED if there's nothing to do; or the usual
169 * negative error code.
170 */
171static int
172xfs_bulk_ireq_setup(
173 struct xfs_mount *mp,
174 const struct xfs_bulk_ireq *hdr,
175 struct xfs_ibulk *breq,
176 void __user *ubuffer)
177{
178 if (hdr->icount == 0 ||
179 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
180 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
181 return -EINVAL;
182
183 breq->startino = hdr->ino;
184 breq->ubuffer = ubuffer;
185 breq->icount = hdr->icount;
186 breq->ocount = 0;
187 breq->flags = 0;
188
189 /*
190 * The @ino parameter is a special value, so we must look it up here.
191 * We're not allowed to have IREQ_AGNO, and we only return one inode
192 * worth of data.
193 */
194 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
195 if (hdr->flags & XFS_BULK_IREQ_AGNO)
196 return -EINVAL;
197
198 switch (hdr->ino) {
199 case XFS_BULK_IREQ_SPECIAL_ROOT:
200 breq->startino = mp->m_sb.sb_rootino;
201 break;
202 default:
203 return -EINVAL;
204 }
205 breq->icount = 1;
206 }
207
208 /*
209 * The IREQ_AGNO flag means that we only want results from a given AG.
210 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
211 * beyond the specified AG then we return no results.
212 */
213 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
214 if (hdr->agno >= mp->m_sb.sb_agcount)
215 return -EINVAL;
216
217 if (breq->startino == 0)
218 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
219 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
220 return -EINVAL;
221
222 breq->flags |= XFS_IBULK_SAME_AG;
223
224 /* Asking for an inode past the end of the AG? We're done! */
225 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
226 return -ECANCELED;
227 } else if (hdr->agno)
228 return -EINVAL;
229
230 /* Asking for an inode past the end of the FS? We're done! */
231 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
232 return -ECANCELED;
233
234 if (hdr->flags & XFS_BULK_IREQ_NREXT64)
235 breq->flags |= XFS_IBULK_NREXT64;
236
237 /* Caller wants to see metadata directories in bulkstat output. */
238 if (hdr->flags & XFS_BULK_IREQ_METADIR)
239 breq->flags |= XFS_IBULK_METADIR;
240
241 return 0;
242}
243
244/*
245 * Update the userspace bulk request @hdr to reflect the end state of the
246 * internal bulk request @breq.
247 */
248static void
249xfs_bulk_ireq_teardown(
250 struct xfs_bulk_ireq *hdr,
251 struct xfs_ibulk *breq)
252{
253 hdr->ino = breq->startino;
254 hdr->ocount = breq->ocount;
255}
256
257/* Handle the v5 bulkstat ioctl. */
258STATIC int
259xfs_ioc_bulkstat(
260 struct file *file,
261 unsigned int cmd,
262 struct xfs_bulkstat_req __user *arg)
263{
264 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
265 struct xfs_bulk_ireq hdr;
266 struct xfs_ibulk breq = {
267 .mp = mp,
268 .idmap = file_mnt_idmap(file),
269 };
270 int error;
271
272 if (!capable(CAP_SYS_ADMIN))
273 return -EPERM;
274
275 if (xfs_is_shutdown(mp))
276 return -EIO;
277
278 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
279 return -EFAULT;
280
281 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
282 if (error == -ECANCELED)
283 goto out_teardown;
284 if (error < 0)
285 return error;
286
287 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
288 if (error)
289 return error;
290
291out_teardown:
292 xfs_bulk_ireq_teardown(&hdr, &breq);
293 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
294 return -EFAULT;
295
296 return 0;
297}
298
299STATIC int
300xfs_inumbers_fmt(
301 struct xfs_ibulk *breq,
302 const struct xfs_inumbers *igrp)
303{
304 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
305 return -EFAULT;
306 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
307}
308
309/* Handle the v5 inumbers ioctl. */
310STATIC int
311xfs_ioc_inumbers(
312 struct xfs_mount *mp,
313 unsigned int cmd,
314 struct xfs_inumbers_req __user *arg)
315{
316 struct xfs_bulk_ireq hdr;
317 struct xfs_ibulk breq = {
318 .mp = mp,
319 };
320 int error;
321
322 if (!capable(CAP_SYS_ADMIN))
323 return -EPERM;
324
325 if (xfs_is_shutdown(mp))
326 return -EIO;
327
328 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
329 return -EFAULT;
330
331 if (hdr.flags & XFS_BULK_IREQ_METADIR)
332 return -EINVAL;
333
334 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
335 if (error == -ECANCELED)
336 goto out_teardown;
337 if (error < 0)
338 return error;
339
340 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
341 if (error)
342 return error;
343
344out_teardown:
345 xfs_bulk_ireq_teardown(&hdr, &breq);
346 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
347 return -EFAULT;
348
349 return 0;
350}
351
352STATIC int
353xfs_ioc_fsgeometry(
354 struct xfs_mount *mp,
355 void __user *arg,
356 int struct_version)
357{
358 struct xfs_fsop_geom fsgeo;
359 size_t len;
360
361 xfs_fs_geometry(mp, &fsgeo, struct_version);
362
363 if (struct_version <= 3)
364 len = sizeof(struct xfs_fsop_geom_v1);
365 else if (struct_version == 4)
366 len = sizeof(struct xfs_fsop_geom_v4);
367 else {
368 xfs_fsop_geom_health(mp, &fsgeo);
369 len = sizeof(fsgeo);
370 }
371
372 if (copy_to_user(arg, &fsgeo, len))
373 return -EFAULT;
374 return 0;
375}
376
377STATIC int
378xfs_ioc_ag_geometry(
379 struct xfs_mount *mp,
380 void __user *arg)
381{
382 struct xfs_perag *pag;
383 struct xfs_ag_geometry ageo;
384 int error;
385
386 if (copy_from_user(&ageo, arg, sizeof(ageo)))
387 return -EFAULT;
388 if (ageo.ag_flags)
389 return -EINVAL;
390 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
391 return -EINVAL;
392
393 pag = xfs_perag_get(mp, ageo.ag_number);
394 if (!pag)
395 return -EINVAL;
396
397 error = xfs_ag_get_geometry(pag, &ageo);
398 xfs_perag_put(pag);
399 if (error)
400 return error;
401
402 if (copy_to_user(arg, &ageo, sizeof(ageo)))
403 return -EFAULT;
404 return 0;
405}
406
407STATIC int
408xfs_ioc_rtgroup_geometry(
409 struct xfs_mount *mp,
410 void __user *arg)
411{
412 struct xfs_rtgroup *rtg;
413 struct xfs_rtgroup_geometry rgeo;
414 int error;
415
416 if (copy_from_user(&rgeo, arg, sizeof(rgeo)))
417 return -EFAULT;
418 if (rgeo.rg_flags)
419 return -EINVAL;
420 if (memchr_inv(&rgeo.rg_reserved, 0, sizeof(rgeo.rg_reserved)))
421 return -EINVAL;
422 if (!xfs_has_rtgroups(mp))
423 return -EINVAL;
424
425 rtg = xfs_rtgroup_get(mp, rgeo.rg_number);
426 if (!rtg)
427 return -EINVAL;
428
429 error = xfs_rtgroup_get_geometry(rtg, &rgeo);
430 xfs_rtgroup_put(rtg);
431 if (error)
432 return error;
433
434 if (copy_to_user(arg, &rgeo, sizeof(rgeo)))
435 return -EFAULT;
436 return 0;
437}
438
439/*
440 * Linux extended inode flags interface.
441 */
442
443static void
444xfs_fill_fsxattr(
445 struct xfs_inode *ip,
446 int whichfork,
447 struct fileattr *fa)
448{
449 struct xfs_mount *mp = ip->i_mount;
450 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
451
452 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
453
454 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
455 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
456 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
457 /*
458 * Don't let a misaligned extent size hint on a directory
459 * escape to userspace if it won't pass the setattr checks
460 * later.
461 */
462 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
463 xfs_extlen_to_rtxmod(mp, ip->i_extsize) > 0) {
464 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
465 FS_XFLAG_EXTSZINHERIT);
466 fa->fsx_extsize = 0;
467 } else {
468 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
469 }
470 }
471
472 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
473 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
474 fa->fsx_projid = ip->i_projid;
475 if (ifp && !xfs_need_iread_extents(ifp))
476 fa->fsx_nextents = xfs_iext_count(ifp);
477 else
478 fa->fsx_nextents = xfs_ifork_nextents(ifp);
479}
480
481STATIC int
482xfs_ioc_fsgetxattra(
483 xfs_inode_t *ip,
484 void __user *arg)
485{
486 struct fileattr fa;
487
488 xfs_ilock(ip, XFS_ILOCK_SHARED);
489 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
490 xfs_iunlock(ip, XFS_ILOCK_SHARED);
491
492 return copy_fsxattr_to_user(&fa, arg);
493}
494
495int
496xfs_fileattr_get(
497 struct dentry *dentry,
498 struct fileattr *fa)
499{
500 struct xfs_inode *ip = XFS_I(d_inode(dentry));
501
502 if (d_is_special(dentry))
503 return -ENOTTY;
504
505 xfs_ilock(ip, XFS_ILOCK_SHARED);
506 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
507 xfs_iunlock(ip, XFS_ILOCK_SHARED);
508
509 return 0;
510}
511
512static int
513xfs_ioctl_setattr_xflags(
514 struct xfs_trans *tp,
515 struct xfs_inode *ip,
516 struct fileattr *fa)
517{
518 struct xfs_mount *mp = ip->i_mount;
519 bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME);
520 uint64_t i_flags2;
521
522 if (rtflag != XFS_IS_REALTIME_INODE(ip)) {
523 /* Can't change realtime flag if any extents are allocated. */
524 if (xfs_inode_has_filedata(ip))
525 return -EINVAL;
526
527 /*
528 * If S_DAX is enabled on this file, we can only switch the
529 * device if both support fsdax. We can't update S_DAX because
530 * there might be other threads walking down the access paths.
531 */
532 if (IS_DAX(VFS_I(ip)) &&
533 (mp->m_ddev_targp->bt_daxdev == NULL ||
534 (mp->m_rtdev_targp &&
535 mp->m_rtdev_targp->bt_daxdev == NULL)))
536 return -EINVAL;
537 }
538
539 if (rtflag) {
540 /* If realtime flag is set then must have realtime device */
541 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
542 xfs_extlen_to_rtxmod(mp, ip->i_extsize))
543 return -EINVAL;
544
545 /* Clear reflink if we are actually able to set the rt flag. */
546 if (xfs_is_reflink_inode(ip))
547 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
548 }
549
550 /* diflags2 only valid for v3 inodes. */
551 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
552 if (i_flags2 && !xfs_has_v3inodes(mp))
553 return -EINVAL;
554
555 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
556 ip->i_diflags2 = i_flags2;
557
558 xfs_diflags_to_iflags(ip, false);
559
560 /*
561 * Make the stable writes flag match that of the device the inode
562 * resides on when flipping the RT flag.
563 */
564 if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode))
565 xfs_update_stable_writes(ip);
566
567 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
568 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
569 XFS_STATS_INC(mp, xs_ig_attrchg);
570 return 0;
571}
572
573static void
574xfs_ioctl_setattr_prepare_dax(
575 struct xfs_inode *ip,
576 struct fileattr *fa)
577{
578 struct xfs_mount *mp = ip->i_mount;
579 struct inode *inode = VFS_I(ip);
580
581 if (S_ISDIR(inode->i_mode))
582 return;
583
584 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
585 return;
586
587 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
588 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
589 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
590 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
591 d_mark_dontcache(inode);
592}
593
594/*
595 * Set up the transaction structure for the setattr operation, checking that we
596 * have permission to do so. On success, return a clean transaction and the
597 * inode locked exclusively ready for further operation specific checks. On
598 * failure, return an error without modifying or locking the inode.
599 */
600static struct xfs_trans *
601xfs_ioctl_setattr_get_trans(
602 struct xfs_inode *ip,
603 struct xfs_dquot *pdqp)
604{
605 struct xfs_mount *mp = ip->i_mount;
606 struct xfs_trans *tp;
607 int error = -EROFS;
608
609 if (xfs_is_readonly(mp))
610 goto out_error;
611 error = -EIO;
612 if (xfs_is_shutdown(mp))
613 goto out_error;
614
615 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
616 has_capability_noaudit(current, CAP_FOWNER), &tp);
617 if (error)
618 goto out_error;
619
620 if (xfs_has_wsync(mp))
621 xfs_trans_set_sync(tp);
622
623 return tp;
624
625out_error:
626 return ERR_PTR(error);
627}
628
629/*
630 * Validate a proposed extent size hint. For regular files, the hint can only
631 * be changed if no extents are allocated.
632 */
633static int
634xfs_ioctl_setattr_check_extsize(
635 struct xfs_inode *ip,
636 struct fileattr *fa)
637{
638 struct xfs_mount *mp = ip->i_mount;
639 xfs_failaddr_t failaddr;
640 uint16_t new_diflags;
641
642 if (!fa->fsx_valid)
643 return 0;
644
645 if (S_ISREG(VFS_I(ip)->i_mode) && xfs_inode_has_filedata(ip) &&
646 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
647 return -EINVAL;
648
649 if (fa->fsx_extsize & mp->m_blockmask)
650 return -EINVAL;
651
652 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
653
654 /*
655 * Inode verifiers do not check that the extent size hint is an integer
656 * multiple of the rt extent size on a directory with both rtinherit
657 * and extszinherit flags set. Don't let sysadmins misconfigure
658 * directories.
659 */
660 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
661 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
662 unsigned int rtextsize_bytes;
663
664 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
665 if (fa->fsx_extsize % rtextsize_bytes)
666 return -EINVAL;
667 }
668
669 failaddr = xfs_inode_validate_extsize(ip->i_mount,
670 XFS_B_TO_FSB(mp, fa->fsx_extsize),
671 VFS_I(ip)->i_mode, new_diflags);
672 return failaddr != NULL ? -EINVAL : 0;
673}
674
675static int
676xfs_ioctl_setattr_check_cowextsize(
677 struct xfs_inode *ip,
678 struct fileattr *fa)
679{
680 struct xfs_mount *mp = ip->i_mount;
681 xfs_failaddr_t failaddr;
682 uint64_t new_diflags2;
683 uint16_t new_diflags;
684
685 if (!fa->fsx_valid)
686 return 0;
687
688 if (fa->fsx_cowextsize & mp->m_blockmask)
689 return -EINVAL;
690
691 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
692 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
693
694 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
695 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
696 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
697 return failaddr != NULL ? -EINVAL : 0;
698}
699
700static int
701xfs_ioctl_setattr_check_projid(
702 struct xfs_inode *ip,
703 struct fileattr *fa)
704{
705 if (!fa->fsx_valid)
706 return 0;
707
708 /* Disallow 32bit project ids if 32bit IDs are not enabled. */
709 if (fa->fsx_projid > (uint16_t)-1 &&
710 !xfs_has_projid32(ip->i_mount))
711 return -EINVAL;
712 return 0;
713}
714
715int
716xfs_fileattr_set(
717 struct mnt_idmap *idmap,
718 struct dentry *dentry,
719 struct fileattr *fa)
720{
721 struct xfs_inode *ip = XFS_I(d_inode(dentry));
722 struct xfs_mount *mp = ip->i_mount;
723 struct xfs_trans *tp;
724 struct xfs_dquot *pdqp = NULL;
725 struct xfs_dquot *olddquot = NULL;
726 int error;
727
728 trace_xfs_ioctl_setattr(ip);
729
730 if (d_is_special(dentry))
731 return -ENOTTY;
732
733 if (!fa->fsx_valid) {
734 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
735 FS_NOATIME_FL | FS_NODUMP_FL |
736 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
737 return -EOPNOTSUPP;
738 }
739
740 error = xfs_ioctl_setattr_check_projid(ip, fa);
741 if (error)
742 return error;
743
744 /*
745 * If disk quotas is on, we make sure that the dquots do exist on disk,
746 * before we start any other transactions. Trying to do this later
747 * is messy. We don't care to take a readlock to look at the ids
748 * in inode here, because we can't hold it across the trans_reserve.
749 * If the IDs do change before we take the ilock, we're covered
750 * because the i_*dquot fields will get updated anyway.
751 */
752 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
753 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
754 VFS_I(ip)->i_gid, fa->fsx_projid,
755 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
756 if (error)
757 return error;
758 }
759
760 xfs_ioctl_setattr_prepare_dax(ip, fa);
761
762 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
763 if (IS_ERR(tp)) {
764 error = PTR_ERR(tp);
765 goto error_free_dquots;
766 }
767
768 error = xfs_ioctl_setattr_check_extsize(ip, fa);
769 if (error)
770 goto error_trans_cancel;
771
772 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
773 if (error)
774 goto error_trans_cancel;
775
776 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
777 if (error)
778 goto error_trans_cancel;
779
780 if (!fa->fsx_valid)
781 goto skip_xattr;
782 /*
783 * Change file ownership. Must be the owner or privileged. CAP_FSETID
784 * overrides the following restrictions:
785 *
786 * The set-user-ID and set-group-ID bits of a file will be cleared upon
787 * successful return from chown()
788 */
789
790 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
791 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID))
792 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
793
794 /* Change the ownerships and register project quota modifications */
795 if (ip->i_projid != fa->fsx_projid) {
796 if (XFS_IS_PQUOTA_ON(mp)) {
797 olddquot = xfs_qm_vop_chown(tp, ip,
798 &ip->i_pdquot, pdqp);
799 }
800 ip->i_projid = fa->fsx_projid;
801 }
802
803 /*
804 * Only set the extent size hint if we've already determined that the
805 * extent size hint should be set on the inode. If no extent size flags
806 * are set on the inode then unconditionally clear the extent size hint.
807 */
808 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
809 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
810 else
811 ip->i_extsize = 0;
812
813 if (xfs_has_v3inodes(mp)) {
814 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
815 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
816 else
817 ip->i_cowextsize = 0;
818 }
819
820skip_xattr:
821 error = xfs_trans_commit(tp);
822
823 /*
824 * Release any dquot(s) the inode had kept before chown.
825 */
826 xfs_qm_dqrele(olddquot);
827 xfs_qm_dqrele(pdqp);
828
829 return error;
830
831error_trans_cancel:
832 xfs_trans_cancel(tp);
833error_free_dquots:
834 xfs_qm_dqrele(pdqp);
835 return error;
836}
837
838static bool
839xfs_getbmap_format(
840 struct kgetbmap *p,
841 struct getbmapx __user *u,
842 size_t recsize)
843{
844 if (put_user(p->bmv_offset, &u->bmv_offset) ||
845 put_user(p->bmv_block, &u->bmv_block) ||
846 put_user(p->bmv_length, &u->bmv_length) ||
847 put_user(0, &u->bmv_count) ||
848 put_user(0, &u->bmv_entries))
849 return false;
850 if (recsize < sizeof(struct getbmapx))
851 return true;
852 if (put_user(0, &u->bmv_iflags) ||
853 put_user(p->bmv_oflags, &u->bmv_oflags) ||
854 put_user(0, &u->bmv_unused1) ||
855 put_user(0, &u->bmv_unused2))
856 return false;
857 return true;
858}
859
860STATIC int
861xfs_ioc_getbmap(
862 struct file *file,
863 unsigned int cmd,
864 void __user *arg)
865{
866 struct getbmapx bmx = { 0 };
867 struct kgetbmap *buf;
868 size_t recsize;
869 int error, i;
870
871 switch (cmd) {
872 case XFS_IOC_GETBMAPA:
873 bmx.bmv_iflags = BMV_IF_ATTRFORK;
874 fallthrough;
875 case XFS_IOC_GETBMAP:
876 /* struct getbmap is a strict subset of struct getbmapx. */
877 recsize = sizeof(struct getbmap);
878 break;
879 case XFS_IOC_GETBMAPX:
880 recsize = sizeof(struct getbmapx);
881 break;
882 default:
883 return -EINVAL;
884 }
885
886 if (copy_from_user(&bmx, arg, recsize))
887 return -EFAULT;
888
889 if (bmx.bmv_count < 2)
890 return -EINVAL;
891 if (bmx.bmv_count >= INT_MAX / recsize)
892 return -ENOMEM;
893
894 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
895 if (!buf)
896 return -ENOMEM;
897
898 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
899 if (error)
900 goto out_free_buf;
901
902 error = -EFAULT;
903 if (copy_to_user(arg, &bmx, recsize))
904 goto out_free_buf;
905 arg += recsize;
906
907 for (i = 0; i < bmx.bmv_entries; i++) {
908 if (!xfs_getbmap_format(buf + i, arg, recsize))
909 goto out_free_buf;
910 arg += recsize;
911 }
912
913 error = 0;
914out_free_buf:
915 kvfree(buf);
916 return error;
917}
918
919int
920xfs_ioc_swapext(
921 xfs_swapext_t *sxp)
922{
923 xfs_inode_t *ip, *tip;
924
925 /* Pull information for the target fd */
926 CLASS(fd, f)((int)sxp->sx_fdtarget);
927 if (fd_empty(f))
928 return -EINVAL;
929
930 if (!(fd_file(f)->f_mode & FMODE_WRITE) ||
931 !(fd_file(f)->f_mode & FMODE_READ) ||
932 (fd_file(f)->f_flags & O_APPEND))
933 return -EBADF;
934
935 CLASS(fd, tmp)((int)sxp->sx_fdtmp);
936 if (fd_empty(tmp))
937 return -EINVAL;
938
939 if (!(fd_file(tmp)->f_mode & FMODE_WRITE) ||
940 !(fd_file(tmp)->f_mode & FMODE_READ) ||
941 (fd_file(tmp)->f_flags & O_APPEND))
942 return -EBADF;
943
944 if (IS_SWAPFILE(file_inode(fd_file(f))) ||
945 IS_SWAPFILE(file_inode(fd_file(tmp))))
946 return -EINVAL;
947
948 /*
949 * We need to ensure that the fds passed in point to XFS inodes
950 * before we cast and access them as XFS structures as we have no
951 * control over what the user passes us here.
952 */
953 if (fd_file(f)->f_op != &xfs_file_operations ||
954 fd_file(tmp)->f_op != &xfs_file_operations)
955 return -EINVAL;
956
957 ip = XFS_I(file_inode(fd_file(f)));
958 tip = XFS_I(file_inode(fd_file(tmp)));
959
960 if (ip->i_mount != tip->i_mount)
961 return -EINVAL;
962
963 if (ip->i_ino == tip->i_ino)
964 return -EINVAL;
965
966 if (xfs_is_shutdown(ip->i_mount))
967 return -EIO;
968
969 return xfs_swap_extents(ip, tip, sxp);
970}
971
972static int
973xfs_ioc_getlabel(
974 struct xfs_mount *mp,
975 char __user *user_label)
976{
977 struct xfs_sb *sbp = &mp->m_sb;
978 char label[XFSLABEL_MAX + 1];
979
980 /* Paranoia */
981 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
982
983 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
984 memset(label, 0, sizeof(label));
985 spin_lock(&mp->m_sb_lock);
986 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
987 spin_unlock(&mp->m_sb_lock);
988
989 if (copy_to_user(user_label, label, sizeof(label)))
990 return -EFAULT;
991 return 0;
992}
993
994static int
995xfs_ioc_setlabel(
996 struct file *filp,
997 struct xfs_mount *mp,
998 char __user *newlabel)
999{
1000 struct xfs_sb *sbp = &mp->m_sb;
1001 char label[XFSLABEL_MAX + 1];
1002 size_t len;
1003 int error;
1004
1005 if (!capable(CAP_SYS_ADMIN))
1006 return -EPERM;
1007 /*
1008 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1009 * smaller, at 12 bytes. We copy one more to be sure we find the
1010 * (required) NULL character to test the incoming label length.
1011 * NB: The on disk label doesn't need to be null terminated.
1012 */
1013 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1014 return -EFAULT;
1015 len = strnlen(label, XFSLABEL_MAX + 1);
1016 if (len > sizeof(sbp->sb_fname))
1017 return -EINVAL;
1018
1019 error = mnt_want_write_file(filp);
1020 if (error)
1021 return error;
1022
1023 spin_lock(&mp->m_sb_lock);
1024 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1025 memcpy(sbp->sb_fname, label, len);
1026 spin_unlock(&mp->m_sb_lock);
1027
1028 /*
1029 * Now we do several things to satisfy userspace.
1030 * In addition to normal logging of the primary superblock, we also
1031 * immediately write these changes to sector zero for the primary, then
1032 * update all backup supers (as xfs_db does for a label change), then
1033 * invalidate the block device page cache. This is so that any prior
1034 * buffered reads from userspace (i.e. from blkid) are invalidated,
1035 * and userspace will see the newly-written label.
1036 */
1037 error = xfs_sync_sb_buf(mp, true);
1038 if (error)
1039 goto out;
1040 /*
1041 * growfs also updates backup supers so lock against that.
1042 */
1043 mutex_lock(&mp->m_growlock);
1044 error = xfs_update_secondary_sbs(mp);
1045 mutex_unlock(&mp->m_growlock);
1046
1047 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1048 if (xfs_has_rtsb(mp) && mp->m_rtdev_targp)
1049 invalidate_bdev(mp->m_rtdev_targp->bt_bdev);
1050
1051out:
1052 mnt_drop_write_file(filp);
1053 return error;
1054}
1055
1056static inline int
1057xfs_fs_eofblocks_from_user(
1058 struct xfs_fs_eofblocks *src,
1059 struct xfs_icwalk *dst)
1060{
1061 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1062 return -EINVAL;
1063
1064 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1065 return -EINVAL;
1066
1067 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1068 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1069 return -EINVAL;
1070
1071 dst->icw_flags = 0;
1072 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1073 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1074 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1075 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1076 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1077 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1078 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1079 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1080 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1081 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1082
1083 dst->icw_prid = src->eof_prid;
1084 dst->icw_min_file_size = src->eof_min_file_size;
1085
1086 dst->icw_uid = INVALID_UID;
1087 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1088 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1089 if (!uid_valid(dst->icw_uid))
1090 return -EINVAL;
1091 }
1092
1093 dst->icw_gid = INVALID_GID;
1094 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1095 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1096 if (!gid_valid(dst->icw_gid))
1097 return -EINVAL;
1098 }
1099 return 0;
1100}
1101
1102static int
1103xfs_ioctl_getset_resblocks(
1104 struct file *filp,
1105 unsigned int cmd,
1106 void __user *arg)
1107{
1108 struct xfs_mount *mp = XFS_I(file_inode(filp))->i_mount;
1109 struct xfs_fsop_resblks fsop = { };
1110 int error;
1111
1112 if (!capable(CAP_SYS_ADMIN))
1113 return -EPERM;
1114
1115 if (cmd == XFS_IOC_SET_RESBLKS) {
1116 if (xfs_is_readonly(mp))
1117 return -EROFS;
1118
1119 if (copy_from_user(&fsop, arg, sizeof(fsop)))
1120 return -EFAULT;
1121
1122 error = mnt_want_write_file(filp);
1123 if (error)
1124 return error;
1125 error = xfs_reserve_blocks(mp, fsop.resblks);
1126 mnt_drop_write_file(filp);
1127 if (error)
1128 return error;
1129 }
1130
1131 spin_lock(&mp->m_sb_lock);
1132 fsop.resblks = mp->m_resblks;
1133 fsop.resblks_avail = mp->m_resblks_avail;
1134 spin_unlock(&mp->m_sb_lock);
1135
1136 if (copy_to_user(arg, &fsop, sizeof(fsop)))
1137 return -EFAULT;
1138 return 0;
1139}
1140
1141static int
1142xfs_ioctl_fs_counts(
1143 struct xfs_mount *mp,
1144 struct xfs_fsop_counts __user *uarg)
1145{
1146 struct xfs_fsop_counts out = {
1147 .allocino = percpu_counter_read_positive(&mp->m_icount),
1148 .freeino = percpu_counter_read_positive(&mp->m_ifree),
1149 .freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
1150 xfs_fdblocks_unavailable(mp),
1151 .freertx = percpu_counter_read_positive(&mp->m_frextents),
1152 };
1153
1154 if (copy_to_user(uarg, &out, sizeof(out)))
1155 return -EFAULT;
1156 return 0;
1157}
1158
1159/*
1160 * These long-unused ioctls were removed from the official ioctl API in 5.17,
1161 * but retain these definitions so that we can log warnings about them.
1162 */
1163#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
1164#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
1165#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
1166#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
1167
1168/*
1169 * Note: some of the ioctl's return positive numbers as a
1170 * byte count indicating success, such as readlink_by_handle.
1171 * So we don't "sign flip" like most other routines. This means
1172 * true errors need to be returned as a negative value.
1173 */
1174long
1175xfs_file_ioctl(
1176 struct file *filp,
1177 unsigned int cmd,
1178 unsigned long p)
1179{
1180 struct inode *inode = file_inode(filp);
1181 struct xfs_inode *ip = XFS_I(inode);
1182 struct xfs_mount *mp = ip->i_mount;
1183 void __user *arg = (void __user *)p;
1184 int error;
1185
1186 trace_xfs_file_ioctl(ip);
1187
1188 switch (cmd) {
1189 case FITRIM:
1190 return xfs_ioc_trim(mp, arg);
1191 case FS_IOC_GETFSLABEL:
1192 return xfs_ioc_getlabel(mp, arg);
1193 case FS_IOC_SETFSLABEL:
1194 return xfs_ioc_setlabel(filp, mp, arg);
1195 case XFS_IOC_ALLOCSP:
1196 case XFS_IOC_FREESP:
1197 case XFS_IOC_ALLOCSP64:
1198 case XFS_IOC_FREESP64:
1199 xfs_warn_once(mp,
1200 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
1201 current->comm);
1202 return -ENOTTY;
1203 case XFS_IOC_DIOINFO: {
1204 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1205 struct dioattr da;
1206
1207 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1208 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1209
1210 if (copy_to_user(arg, &da, sizeof(da)))
1211 return -EFAULT;
1212 return 0;
1213 }
1214
1215 case XFS_IOC_FSBULKSTAT_SINGLE:
1216 case XFS_IOC_FSBULKSTAT:
1217 case XFS_IOC_FSINUMBERS:
1218 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1219
1220 case XFS_IOC_BULKSTAT:
1221 return xfs_ioc_bulkstat(filp, cmd, arg);
1222 case XFS_IOC_INUMBERS:
1223 return xfs_ioc_inumbers(mp, cmd, arg);
1224
1225 case XFS_IOC_FSGEOMETRY_V1:
1226 return xfs_ioc_fsgeometry(mp, arg, 3);
1227 case XFS_IOC_FSGEOMETRY_V4:
1228 return xfs_ioc_fsgeometry(mp, arg, 4);
1229 case XFS_IOC_FSGEOMETRY:
1230 return xfs_ioc_fsgeometry(mp, arg, 5);
1231
1232 case XFS_IOC_AG_GEOMETRY:
1233 return xfs_ioc_ag_geometry(mp, arg);
1234 case XFS_IOC_RTGROUP_GEOMETRY:
1235 return xfs_ioc_rtgroup_geometry(mp, arg);
1236
1237 case XFS_IOC_GETVERSION:
1238 return put_user(inode->i_generation, (int __user *)arg);
1239
1240 case XFS_IOC_FSGETXATTRA:
1241 return xfs_ioc_fsgetxattra(ip, arg);
1242 case XFS_IOC_GETPARENTS:
1243 return xfs_ioc_getparents(filp, arg);
1244 case XFS_IOC_GETPARENTS_BY_HANDLE:
1245 return xfs_ioc_getparents_by_handle(filp, arg);
1246 case XFS_IOC_GETBMAP:
1247 case XFS_IOC_GETBMAPA:
1248 case XFS_IOC_GETBMAPX:
1249 return xfs_ioc_getbmap(filp, cmd, arg);
1250
1251 case FS_IOC_GETFSMAP:
1252 return xfs_ioc_getfsmap(ip, arg);
1253
1254 case XFS_IOC_SCRUBV_METADATA:
1255 return xfs_ioc_scrubv_metadata(filp, arg);
1256 case XFS_IOC_SCRUB_METADATA:
1257 return xfs_ioc_scrub_metadata(filp, arg);
1258
1259 case XFS_IOC_FD_TO_HANDLE:
1260 case XFS_IOC_PATH_TO_HANDLE:
1261 case XFS_IOC_PATH_TO_FSHANDLE: {
1262 xfs_fsop_handlereq_t hreq;
1263
1264 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1265 return -EFAULT;
1266 return xfs_find_handle(cmd, &hreq);
1267 }
1268 case XFS_IOC_OPEN_BY_HANDLE: {
1269 xfs_fsop_handlereq_t hreq;
1270
1271 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1272 return -EFAULT;
1273 return xfs_open_by_handle(filp, &hreq);
1274 }
1275
1276 case XFS_IOC_READLINK_BY_HANDLE: {
1277 xfs_fsop_handlereq_t hreq;
1278
1279 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1280 return -EFAULT;
1281 return xfs_readlink_by_handle(filp, &hreq);
1282 }
1283 case XFS_IOC_ATTRLIST_BY_HANDLE:
1284 return xfs_attrlist_by_handle(filp, arg);
1285
1286 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1287 return xfs_attrmulti_by_handle(filp, arg);
1288
1289 case XFS_IOC_SWAPEXT: {
1290 struct xfs_swapext sxp;
1291
1292 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1293 return -EFAULT;
1294 error = mnt_want_write_file(filp);
1295 if (error)
1296 return error;
1297 error = xfs_ioc_swapext(&sxp);
1298 mnt_drop_write_file(filp);
1299 return error;
1300 }
1301
1302 case XFS_IOC_FSCOUNTS:
1303 return xfs_ioctl_fs_counts(mp, arg);
1304
1305 case XFS_IOC_SET_RESBLKS:
1306 case XFS_IOC_GET_RESBLKS:
1307 return xfs_ioctl_getset_resblocks(filp, cmd, arg);
1308
1309 case XFS_IOC_FSGROWFSDATA: {
1310 struct xfs_growfs_data in;
1311
1312 if (copy_from_user(&in, arg, sizeof(in)))
1313 return -EFAULT;
1314
1315 error = mnt_want_write_file(filp);
1316 if (error)
1317 return error;
1318 error = xfs_growfs_data(mp, &in);
1319 mnt_drop_write_file(filp);
1320 return error;
1321 }
1322
1323 case XFS_IOC_FSGROWFSLOG: {
1324 struct xfs_growfs_log in;
1325
1326 if (copy_from_user(&in, arg, sizeof(in)))
1327 return -EFAULT;
1328
1329 error = mnt_want_write_file(filp);
1330 if (error)
1331 return error;
1332 error = xfs_growfs_log(mp, &in);
1333 mnt_drop_write_file(filp);
1334 return error;
1335 }
1336
1337 case XFS_IOC_FSGROWFSRT: {
1338 xfs_growfs_rt_t in;
1339
1340 if (copy_from_user(&in, arg, sizeof(in)))
1341 return -EFAULT;
1342
1343 error = mnt_want_write_file(filp);
1344 if (error)
1345 return error;
1346 error = xfs_growfs_rt(mp, &in);
1347 mnt_drop_write_file(filp);
1348 return error;
1349 }
1350
1351 case XFS_IOC_GOINGDOWN: {
1352 uint32_t in;
1353
1354 if (!capable(CAP_SYS_ADMIN))
1355 return -EPERM;
1356
1357 if (get_user(in, (uint32_t __user *)arg))
1358 return -EFAULT;
1359
1360 return xfs_fs_goingdown(mp, in);
1361 }
1362
1363 case XFS_IOC_ERROR_INJECTION: {
1364 xfs_error_injection_t in;
1365
1366 if (!capable(CAP_SYS_ADMIN))
1367 return -EPERM;
1368
1369 if (copy_from_user(&in, arg, sizeof(in)))
1370 return -EFAULT;
1371
1372 return xfs_errortag_add(mp, in.errtag);
1373 }
1374
1375 case XFS_IOC_ERROR_CLEARALL:
1376 if (!capable(CAP_SYS_ADMIN))
1377 return -EPERM;
1378
1379 return xfs_errortag_clearall(mp);
1380
1381 case XFS_IOC_FREE_EOFBLOCKS: {
1382 struct xfs_fs_eofblocks eofb;
1383 struct xfs_icwalk icw;
1384
1385 if (!capable(CAP_SYS_ADMIN))
1386 return -EPERM;
1387
1388 if (xfs_is_readonly(mp))
1389 return -EROFS;
1390
1391 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1392 return -EFAULT;
1393
1394 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
1395 if (error)
1396 return error;
1397
1398 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
1399
1400 sb_start_write(mp->m_super);
1401 error = xfs_blockgc_free_space(mp, &icw);
1402 sb_end_write(mp->m_super);
1403 return error;
1404 }
1405
1406 case XFS_IOC_EXCHANGE_RANGE:
1407 return xfs_ioc_exchange_range(filp, arg);
1408 case XFS_IOC_START_COMMIT:
1409 return xfs_ioc_start_commit(filp, arg);
1410 case XFS_IOC_COMMIT_RANGE:
1411 return xfs_ioc_commit_range(filp, arg);
1412
1413 default:
1414 return -ENOTTY;
1415 }
1416}