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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_attr.h"
19#include "xfs_bmap.h"
20#include "xfs_bmap_util.h"
21#include "xfs_fsops.h"
22#include "xfs_discard.h"
23#include "xfs_quota.h"
24#include "xfs_export.h"
25#include "xfs_trace.h"
26#include "xfs_icache.h"
27#include "xfs_trans.h"
28#include "xfs_acl.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_da_format.h"
39#include "xfs_da_btree.h"
40
41#include <linux/mount.h>
42#include <linux/namei.h>
43
44/*
45 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
46 * a file or fs handle.
47 *
48 * XFS_IOC_PATH_TO_FSHANDLE
49 * returns fs handle for a mount point or path within that mount point
50 * XFS_IOC_FD_TO_HANDLE
51 * returns full handle for a FD opened in user space
52 * XFS_IOC_PATH_TO_HANDLE
53 * returns full handle for a path
54 */
55int
56xfs_find_handle(
57 unsigned int cmd,
58 xfs_fsop_handlereq_t *hreq)
59{
60 int hsize;
61 xfs_handle_t handle;
62 struct inode *inode;
63 struct fd f = {NULL};
64 struct path path;
65 int error;
66 struct xfs_inode *ip;
67
68 if (cmd == XFS_IOC_FD_TO_HANDLE) {
69 f = fdget(hreq->fd);
70 if (!f.file)
71 return -EBADF;
72 inode = file_inode(f.file);
73 } else {
74 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
75 if (error)
76 return error;
77 inode = d_inode(path.dentry);
78 }
79 ip = XFS_I(inode);
80
81 /*
82 * We can only generate handles for inodes residing on a XFS filesystem,
83 * and only for regular files, directories or symbolic links.
84 */
85 error = -EINVAL;
86 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
87 goto out_put;
88
89 error = -EBADF;
90 if (!S_ISREG(inode->i_mode) &&
91 !S_ISDIR(inode->i_mode) &&
92 !S_ISLNK(inode->i_mode))
93 goto out_put;
94
95
96 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
97
98 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
99 /*
100 * This handle only contains an fsid, zero the rest.
101 */
102 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
103 hsize = sizeof(xfs_fsid_t);
104 } else {
105 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
106 sizeof(handle.ha_fid.fid_len);
107 handle.ha_fid.fid_pad = 0;
108 handle.ha_fid.fid_gen = inode->i_generation;
109 handle.ha_fid.fid_ino = ip->i_ino;
110 hsize = sizeof(xfs_handle_t);
111 }
112
113 error = -EFAULT;
114 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
115 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
116 goto out_put;
117
118 error = 0;
119
120 out_put:
121 if (cmd == XFS_IOC_FD_TO_HANDLE)
122 fdput(f);
123 else
124 path_put(&path);
125 return error;
126}
127
128/*
129 * No need to do permission checks on the various pathname components
130 * as the handle operations are privileged.
131 */
132STATIC int
133xfs_handle_acceptable(
134 void *context,
135 struct dentry *dentry)
136{
137 return 1;
138}
139
140/*
141 * Convert userspace handle data into a dentry.
142 */
143struct dentry *
144xfs_handle_to_dentry(
145 struct file *parfilp,
146 void __user *uhandle,
147 u32 hlen)
148{
149 xfs_handle_t handle;
150 struct xfs_fid64 fid;
151
152 /*
153 * Only allow handle opens under a directory.
154 */
155 if (!S_ISDIR(file_inode(parfilp)->i_mode))
156 return ERR_PTR(-ENOTDIR);
157
158 if (hlen != sizeof(xfs_handle_t))
159 return ERR_PTR(-EINVAL);
160 if (copy_from_user(&handle, uhandle, hlen))
161 return ERR_PTR(-EFAULT);
162 if (handle.ha_fid.fid_len !=
163 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
164 return ERR_PTR(-EINVAL);
165
166 memset(&fid, 0, sizeof(struct fid));
167 fid.ino = handle.ha_fid.fid_ino;
168 fid.gen = handle.ha_fid.fid_gen;
169
170 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
171 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
172 xfs_handle_acceptable, NULL);
173}
174
175STATIC struct dentry *
176xfs_handlereq_to_dentry(
177 struct file *parfilp,
178 xfs_fsop_handlereq_t *hreq)
179{
180 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
181}
182
183int
184xfs_open_by_handle(
185 struct file *parfilp,
186 xfs_fsop_handlereq_t *hreq)
187{
188 const struct cred *cred = current_cred();
189 int error;
190 int fd;
191 int permflag;
192 struct file *filp;
193 struct inode *inode;
194 struct dentry *dentry;
195 fmode_t fmode;
196 struct path path;
197
198 if (!capable(CAP_SYS_ADMIN))
199 return -EPERM;
200
201 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
202 if (IS_ERR(dentry))
203 return PTR_ERR(dentry);
204 inode = d_inode(dentry);
205
206 /* Restrict xfs_open_by_handle to directories & regular files. */
207 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
208 error = -EPERM;
209 goto out_dput;
210 }
211
212#if BITS_PER_LONG != 32
213 hreq->oflags |= O_LARGEFILE;
214#endif
215
216 permflag = hreq->oflags;
217 fmode = OPEN_FMODE(permflag);
218 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
219 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
220 error = -EPERM;
221 goto out_dput;
222 }
223
224 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
225 error = -EPERM;
226 goto out_dput;
227 }
228
229 /* Can't write directories. */
230 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
231 error = -EISDIR;
232 goto out_dput;
233 }
234
235 fd = get_unused_fd_flags(0);
236 if (fd < 0) {
237 error = fd;
238 goto out_dput;
239 }
240
241 path.mnt = parfilp->f_path.mnt;
242 path.dentry = dentry;
243 filp = dentry_open(&path, hreq->oflags, cred);
244 dput(dentry);
245 if (IS_ERR(filp)) {
246 put_unused_fd(fd);
247 return PTR_ERR(filp);
248 }
249
250 if (S_ISREG(inode->i_mode)) {
251 filp->f_flags |= O_NOATIME;
252 filp->f_mode |= FMODE_NOCMTIME;
253 }
254
255 fd_install(fd, filp);
256 return fd;
257
258 out_dput:
259 dput(dentry);
260 return error;
261}
262
263int
264xfs_readlink_by_handle(
265 struct file *parfilp,
266 xfs_fsop_handlereq_t *hreq)
267{
268 struct dentry *dentry;
269 __u32 olen;
270 int error;
271
272 if (!capable(CAP_SYS_ADMIN))
273 return -EPERM;
274
275 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
276 if (IS_ERR(dentry))
277 return PTR_ERR(dentry);
278
279 /* Restrict this handle operation to symlinks only. */
280 if (!d_is_symlink(dentry)) {
281 error = -EINVAL;
282 goto out_dput;
283 }
284
285 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
286 error = -EFAULT;
287 goto out_dput;
288 }
289
290 error = vfs_readlink(dentry, hreq->ohandle, olen);
291
292 out_dput:
293 dput(dentry);
294 return error;
295}
296
297/*
298 * Format an attribute and copy it out to the user's buffer.
299 * Take care to check values and protect against them changing later,
300 * we may be reading them directly out of a user buffer.
301 */
302static void
303xfs_ioc_attr_put_listent(
304 struct xfs_attr_list_context *context,
305 int flags,
306 unsigned char *name,
307 int namelen,
308 int valuelen)
309{
310 struct xfs_attrlist *alist = context->buffer;
311 struct xfs_attrlist_ent *aep;
312 int arraytop;
313
314 ASSERT(!context->seen_enough);
315 ASSERT(context->count >= 0);
316 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
317 ASSERT(context->firstu >= sizeof(*alist));
318 ASSERT(context->firstu <= context->bufsize);
319
320 /*
321 * Only list entries in the right namespace.
322 */
323 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
324 return;
325
326 arraytop = sizeof(*alist) +
327 context->count * sizeof(alist->al_offset[0]);
328
329 /* decrement by the actual bytes used by the attr */
330 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
331 namelen + 1, sizeof(uint32_t));
332 if (context->firstu < arraytop) {
333 trace_xfs_attr_list_full(context);
334 alist->al_more = 1;
335 context->seen_enough = 1;
336 return;
337 }
338
339 aep = context->buffer + context->firstu;
340 aep->a_valuelen = valuelen;
341 memcpy(aep->a_name, name, namelen);
342 aep->a_name[namelen] = 0;
343 alist->al_offset[context->count++] = context->firstu;
344 alist->al_count = context->count;
345 trace_xfs_attr_list_add(context);
346}
347
348static unsigned int
349xfs_attr_filter(
350 u32 ioc_flags)
351{
352 if (ioc_flags & XFS_IOC_ATTR_ROOT)
353 return XFS_ATTR_ROOT;
354 if (ioc_flags & XFS_IOC_ATTR_SECURE)
355 return XFS_ATTR_SECURE;
356 return 0;
357}
358
359static unsigned int
360xfs_attr_flags(
361 u32 ioc_flags)
362{
363 if (ioc_flags & XFS_IOC_ATTR_CREATE)
364 return XATTR_CREATE;
365 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
366 return XATTR_REPLACE;
367 return 0;
368}
369
370int
371xfs_ioc_attr_list(
372 struct xfs_inode *dp,
373 void __user *ubuf,
374 int bufsize,
375 int flags,
376 struct xfs_attrlist_cursor __user *ucursor)
377{
378 struct xfs_attr_list_context context = { };
379 struct xfs_attrlist *alist;
380 void *buffer;
381 int error;
382
383 if (bufsize < sizeof(struct xfs_attrlist) ||
384 bufsize > XFS_XATTR_LIST_MAX)
385 return -EINVAL;
386
387 /*
388 * Reject flags, only allow namespaces.
389 */
390 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
391 return -EINVAL;
392 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
393 return -EINVAL;
394
395 /*
396 * Validate the cursor.
397 */
398 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
399 return -EFAULT;
400 if (context.cursor.pad1 || context.cursor.pad2)
401 return -EINVAL;
402 if (!context.cursor.initted &&
403 (context.cursor.hashval || context.cursor.blkno ||
404 context.cursor.offset))
405 return -EINVAL;
406
407 buffer = kmem_zalloc_large(bufsize, 0);
408 if (!buffer)
409 return -ENOMEM;
410
411 /*
412 * Initialize the output buffer.
413 */
414 context.dp = dp;
415 context.resynch = 1;
416 context.attr_filter = xfs_attr_filter(flags);
417 context.buffer = buffer;
418 context.bufsize = round_down(bufsize, sizeof(uint32_t));
419 context.firstu = context.bufsize;
420 context.put_listent = xfs_ioc_attr_put_listent;
421
422 alist = context.buffer;
423 alist->al_count = 0;
424 alist->al_more = 0;
425 alist->al_offset[0] = context.bufsize;
426
427 error = xfs_attr_list(&context);
428 if (error)
429 goto out_free;
430
431 if (copy_to_user(ubuf, buffer, bufsize) ||
432 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
433 error = -EFAULT;
434out_free:
435 kmem_free(buffer);
436 return error;
437}
438
439STATIC int
440xfs_attrlist_by_handle(
441 struct file *parfilp,
442 struct xfs_fsop_attrlist_handlereq __user *p)
443{
444 struct xfs_fsop_attrlist_handlereq al_hreq;
445 struct dentry *dentry;
446 int error = -ENOMEM;
447
448 if (!capable(CAP_SYS_ADMIN))
449 return -EPERM;
450 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
451 return -EFAULT;
452
453 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
454 if (IS_ERR(dentry))
455 return PTR_ERR(dentry);
456
457 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
458 al_hreq.buflen, al_hreq.flags, &p->pos);
459 dput(dentry);
460 return error;
461}
462
463static int
464xfs_attrmulti_attr_get(
465 struct inode *inode,
466 unsigned char *name,
467 unsigned char __user *ubuf,
468 uint32_t *len,
469 uint32_t flags)
470{
471 struct xfs_da_args args = {
472 .dp = XFS_I(inode),
473 .attr_filter = xfs_attr_filter(flags),
474 .attr_flags = xfs_attr_flags(flags),
475 .name = name,
476 .namelen = strlen(name),
477 .valuelen = *len,
478 };
479 int error;
480
481 if (*len > XFS_XATTR_SIZE_MAX)
482 return -EINVAL;
483
484 error = xfs_attr_get(&args);
485 if (error)
486 goto out_kfree;
487
488 *len = args.valuelen;
489 if (copy_to_user(ubuf, args.value, args.valuelen))
490 error = -EFAULT;
491
492out_kfree:
493 kmem_free(args.value);
494 return error;
495}
496
497static int
498xfs_attrmulti_attr_set(
499 struct inode *inode,
500 unsigned char *name,
501 const unsigned char __user *ubuf,
502 uint32_t len,
503 uint32_t flags)
504{
505 struct xfs_da_args args = {
506 .dp = XFS_I(inode),
507 .attr_filter = xfs_attr_filter(flags),
508 .attr_flags = xfs_attr_flags(flags),
509 .name = name,
510 .namelen = strlen(name),
511 };
512 int error;
513
514 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
515 return -EPERM;
516
517 if (ubuf) {
518 if (len > XFS_XATTR_SIZE_MAX)
519 return -EINVAL;
520 args.value = memdup_user(ubuf, len);
521 if (IS_ERR(args.value))
522 return PTR_ERR(args.value);
523 args.valuelen = len;
524 }
525
526 error = xfs_attr_set(&args);
527 if (!error && (flags & XFS_IOC_ATTR_ROOT))
528 xfs_forget_acl(inode, name);
529 kfree(args.value);
530 return error;
531}
532
533int
534xfs_ioc_attrmulti_one(
535 struct file *parfilp,
536 struct inode *inode,
537 uint32_t opcode,
538 void __user *uname,
539 void __user *value,
540 uint32_t *len,
541 uint32_t flags)
542{
543 unsigned char *name;
544 int error;
545
546 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
547 return -EINVAL;
548
549 name = strndup_user(uname, MAXNAMELEN);
550 if (IS_ERR(name))
551 return PTR_ERR(name);
552
553 switch (opcode) {
554 case ATTR_OP_GET:
555 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
556 break;
557 case ATTR_OP_REMOVE:
558 value = NULL;
559 *len = 0;
560 /* fall through */
561 case ATTR_OP_SET:
562 error = mnt_want_write_file(parfilp);
563 if (error)
564 break;
565 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
566 mnt_drop_write_file(parfilp);
567 break;
568 default:
569 error = -EINVAL;
570 break;
571 }
572
573 kfree(name);
574 return error;
575}
576
577STATIC int
578xfs_attrmulti_by_handle(
579 struct file *parfilp,
580 void __user *arg)
581{
582 int error;
583 xfs_attr_multiop_t *ops;
584 xfs_fsop_attrmulti_handlereq_t am_hreq;
585 struct dentry *dentry;
586 unsigned int i, size;
587
588 if (!capable(CAP_SYS_ADMIN))
589 return -EPERM;
590 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
591 return -EFAULT;
592
593 /* overflow check */
594 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
595 return -E2BIG;
596
597 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
598 if (IS_ERR(dentry))
599 return PTR_ERR(dentry);
600
601 error = -E2BIG;
602 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
603 if (!size || size > 16 * PAGE_SIZE)
604 goto out_dput;
605
606 ops = memdup_user(am_hreq.ops, size);
607 if (IS_ERR(ops)) {
608 error = PTR_ERR(ops);
609 goto out_dput;
610 }
611
612 error = 0;
613 for (i = 0; i < am_hreq.opcount; i++) {
614 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
615 d_inode(dentry), ops[i].am_opcode,
616 ops[i].am_attrname, ops[i].am_attrvalue,
617 &ops[i].am_length, ops[i].am_flags);
618 }
619
620 if (copy_to_user(am_hreq.ops, ops, size))
621 error = -EFAULT;
622
623 kfree(ops);
624 out_dput:
625 dput(dentry);
626 return error;
627}
628
629int
630xfs_ioc_space(
631 struct file *filp,
632 xfs_flock64_t *bf)
633{
634 struct inode *inode = file_inode(filp);
635 struct xfs_inode *ip = XFS_I(inode);
636 struct iattr iattr;
637 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR;
638 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
639 int error;
640
641 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
642 return -EPERM;
643
644 if (!(filp->f_mode & FMODE_WRITE))
645 return -EBADF;
646
647 if (!S_ISREG(inode->i_mode))
648 return -EINVAL;
649
650 if (xfs_is_always_cow_inode(ip))
651 return -EOPNOTSUPP;
652
653 if (filp->f_flags & O_DSYNC)
654 flags |= XFS_PREALLOC_SYNC;
655 if (filp->f_mode & FMODE_NOCMTIME)
656 flags |= XFS_PREALLOC_INVISIBLE;
657
658 error = mnt_want_write_file(filp);
659 if (error)
660 return error;
661
662 xfs_ilock(ip, iolock);
663 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
664 if (error)
665 goto out_unlock;
666 inode_dio_wait(inode);
667
668 switch (bf->l_whence) {
669 case 0: /*SEEK_SET*/
670 break;
671 case 1: /*SEEK_CUR*/
672 bf->l_start += filp->f_pos;
673 break;
674 case 2: /*SEEK_END*/
675 bf->l_start += XFS_ISIZE(ip);
676 break;
677 default:
678 error = -EINVAL;
679 goto out_unlock;
680 }
681
682 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) {
683 error = -EINVAL;
684 goto out_unlock;
685 }
686
687 if (bf->l_start > XFS_ISIZE(ip)) {
688 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
689 bf->l_start - XFS_ISIZE(ip), 0);
690 if (error)
691 goto out_unlock;
692 }
693
694 iattr.ia_valid = ATTR_SIZE;
695 iattr.ia_size = bf->l_start;
696 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
697 if (error)
698 goto out_unlock;
699
700 error = xfs_update_prealloc_flags(ip, flags);
701
702out_unlock:
703 xfs_iunlock(ip, iolock);
704 mnt_drop_write_file(filp);
705 return error;
706}
707
708/* Return 0 on success or positive error */
709int
710xfs_fsbulkstat_one_fmt(
711 struct xfs_ibulk *breq,
712 const struct xfs_bulkstat *bstat)
713{
714 struct xfs_bstat bs1;
715
716 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
717 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
718 return -EFAULT;
719 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
720}
721
722int
723xfs_fsinumbers_fmt(
724 struct xfs_ibulk *breq,
725 const struct xfs_inumbers *igrp)
726{
727 struct xfs_inogrp ig1;
728
729 xfs_inumbers_to_inogrp(&ig1, igrp);
730 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
731 return -EFAULT;
732 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
733}
734
735STATIC int
736xfs_ioc_fsbulkstat(
737 xfs_mount_t *mp,
738 unsigned int cmd,
739 void __user *arg)
740{
741 struct xfs_fsop_bulkreq bulkreq;
742 struct xfs_ibulk breq = {
743 .mp = mp,
744 .ocount = 0,
745 };
746 xfs_ino_t lastino;
747 int error;
748
749 /* done = 1 if there are more stats to get and if bulkstat */
750 /* should be called again (unused here, but used in dmapi) */
751
752 if (!capable(CAP_SYS_ADMIN))
753 return -EPERM;
754
755 if (XFS_FORCED_SHUTDOWN(mp))
756 return -EIO;
757
758 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
759 return -EFAULT;
760
761 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
762 return -EFAULT;
763
764 if (bulkreq.icount <= 0)
765 return -EINVAL;
766
767 if (bulkreq.ubuffer == NULL)
768 return -EINVAL;
769
770 breq.ubuffer = bulkreq.ubuffer;
771 breq.icount = bulkreq.icount;
772
773 /*
774 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
775 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
776 * that *lastip contains either zero or the number of the last inode to
777 * be examined by the previous call and return results starting with
778 * the next inode after that. The new bulk request back end functions
779 * take the inode to start with, so we have to compute the startino
780 * parameter from lastino to maintain correct function. lastino == 0
781 * is a special case because it has traditionally meant "first inode
782 * in filesystem".
783 */
784 if (cmd == XFS_IOC_FSINUMBERS) {
785 breq.startino = lastino ? lastino + 1 : 0;
786 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
787 lastino = breq.startino - 1;
788 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
789 breq.startino = lastino;
790 breq.icount = 1;
791 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
792 } else { /* XFS_IOC_FSBULKSTAT */
793 breq.startino = lastino ? lastino + 1 : 0;
794 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
795 lastino = breq.startino - 1;
796 }
797
798 if (error)
799 return error;
800
801 if (bulkreq.lastip != NULL &&
802 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
803 return -EFAULT;
804
805 if (bulkreq.ocount != NULL &&
806 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
807 return -EFAULT;
808
809 return 0;
810}
811
812/* Return 0 on success or positive error */
813static int
814xfs_bulkstat_fmt(
815 struct xfs_ibulk *breq,
816 const struct xfs_bulkstat *bstat)
817{
818 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
819 return -EFAULT;
820 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
821}
822
823/*
824 * Check the incoming bulk request @hdr from userspace and initialize the
825 * internal @breq bulk request appropriately. Returns 0 if the bulk request
826 * should proceed; -ECANCELED if there's nothing to do; or the usual
827 * negative error code.
828 */
829static int
830xfs_bulk_ireq_setup(
831 struct xfs_mount *mp,
832 struct xfs_bulk_ireq *hdr,
833 struct xfs_ibulk *breq,
834 void __user *ubuffer)
835{
836 if (hdr->icount == 0 ||
837 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
838 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
839 return -EINVAL;
840
841 breq->startino = hdr->ino;
842 breq->ubuffer = ubuffer;
843 breq->icount = hdr->icount;
844 breq->ocount = 0;
845 breq->flags = 0;
846
847 /*
848 * The @ino parameter is a special value, so we must look it up here.
849 * We're not allowed to have IREQ_AGNO, and we only return one inode
850 * worth of data.
851 */
852 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
853 if (hdr->flags & XFS_BULK_IREQ_AGNO)
854 return -EINVAL;
855
856 switch (hdr->ino) {
857 case XFS_BULK_IREQ_SPECIAL_ROOT:
858 hdr->ino = mp->m_sb.sb_rootino;
859 break;
860 default:
861 return -EINVAL;
862 }
863 breq->icount = 1;
864 }
865
866 /*
867 * The IREQ_AGNO flag means that we only want results from a given AG.
868 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
869 * beyond the specified AG then we return no results.
870 */
871 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
872 if (hdr->agno >= mp->m_sb.sb_agcount)
873 return -EINVAL;
874
875 if (breq->startino == 0)
876 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
877 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
878 return -EINVAL;
879
880 breq->flags |= XFS_IBULK_SAME_AG;
881
882 /* Asking for an inode past the end of the AG? We're done! */
883 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
884 return -ECANCELED;
885 } else if (hdr->agno)
886 return -EINVAL;
887
888 /* Asking for an inode past the end of the FS? We're done! */
889 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
890 return -ECANCELED;
891
892 return 0;
893}
894
895/*
896 * Update the userspace bulk request @hdr to reflect the end state of the
897 * internal bulk request @breq.
898 */
899static void
900xfs_bulk_ireq_teardown(
901 struct xfs_bulk_ireq *hdr,
902 struct xfs_ibulk *breq)
903{
904 hdr->ino = breq->startino;
905 hdr->ocount = breq->ocount;
906}
907
908/* Handle the v5 bulkstat ioctl. */
909STATIC int
910xfs_ioc_bulkstat(
911 struct xfs_mount *mp,
912 unsigned int cmd,
913 struct xfs_bulkstat_req __user *arg)
914{
915 struct xfs_bulk_ireq hdr;
916 struct xfs_ibulk breq = {
917 .mp = mp,
918 };
919 int error;
920
921 if (!capable(CAP_SYS_ADMIN))
922 return -EPERM;
923
924 if (XFS_FORCED_SHUTDOWN(mp))
925 return -EIO;
926
927 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
928 return -EFAULT;
929
930 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
931 if (error == -ECANCELED)
932 goto out_teardown;
933 if (error < 0)
934 return error;
935
936 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
937 if (error)
938 return error;
939
940out_teardown:
941 xfs_bulk_ireq_teardown(&hdr, &breq);
942 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
943 return -EFAULT;
944
945 return 0;
946}
947
948STATIC int
949xfs_inumbers_fmt(
950 struct xfs_ibulk *breq,
951 const struct xfs_inumbers *igrp)
952{
953 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
954 return -EFAULT;
955 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
956}
957
958/* Handle the v5 inumbers ioctl. */
959STATIC int
960xfs_ioc_inumbers(
961 struct xfs_mount *mp,
962 unsigned int cmd,
963 struct xfs_inumbers_req __user *arg)
964{
965 struct xfs_bulk_ireq hdr;
966 struct xfs_ibulk breq = {
967 .mp = mp,
968 };
969 int error;
970
971 if (!capable(CAP_SYS_ADMIN))
972 return -EPERM;
973
974 if (XFS_FORCED_SHUTDOWN(mp))
975 return -EIO;
976
977 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
978 return -EFAULT;
979
980 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
981 if (error == -ECANCELED)
982 goto out_teardown;
983 if (error < 0)
984 return error;
985
986 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
987 if (error)
988 return error;
989
990out_teardown:
991 xfs_bulk_ireq_teardown(&hdr, &breq);
992 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
993 return -EFAULT;
994
995 return 0;
996}
997
998STATIC int
999xfs_ioc_fsgeometry(
1000 struct xfs_mount *mp,
1001 void __user *arg,
1002 int struct_version)
1003{
1004 struct xfs_fsop_geom fsgeo;
1005 size_t len;
1006
1007 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version);
1008
1009 if (struct_version <= 3)
1010 len = sizeof(struct xfs_fsop_geom_v1);
1011 else if (struct_version == 4)
1012 len = sizeof(struct xfs_fsop_geom_v4);
1013 else {
1014 xfs_fsop_geom_health(mp, &fsgeo);
1015 len = sizeof(fsgeo);
1016 }
1017
1018 if (copy_to_user(arg, &fsgeo, len))
1019 return -EFAULT;
1020 return 0;
1021}
1022
1023STATIC int
1024xfs_ioc_ag_geometry(
1025 struct xfs_mount *mp,
1026 void __user *arg)
1027{
1028 struct xfs_ag_geometry ageo;
1029 int error;
1030
1031 if (copy_from_user(&ageo, arg, sizeof(ageo)))
1032 return -EFAULT;
1033 if (ageo.ag_flags)
1034 return -EINVAL;
1035 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
1036 return -EINVAL;
1037
1038 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1039 if (error)
1040 return error;
1041
1042 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1043 return -EFAULT;
1044 return 0;
1045}
1046
1047/*
1048 * Linux extended inode flags interface.
1049 */
1050
1051STATIC unsigned int
1052xfs_merge_ioc_xflags(
1053 unsigned int flags,
1054 unsigned int start)
1055{
1056 unsigned int xflags = start;
1057
1058 if (flags & FS_IMMUTABLE_FL)
1059 xflags |= FS_XFLAG_IMMUTABLE;
1060 else
1061 xflags &= ~FS_XFLAG_IMMUTABLE;
1062 if (flags & FS_APPEND_FL)
1063 xflags |= FS_XFLAG_APPEND;
1064 else
1065 xflags &= ~FS_XFLAG_APPEND;
1066 if (flags & FS_SYNC_FL)
1067 xflags |= FS_XFLAG_SYNC;
1068 else
1069 xflags &= ~FS_XFLAG_SYNC;
1070 if (flags & FS_NOATIME_FL)
1071 xflags |= FS_XFLAG_NOATIME;
1072 else
1073 xflags &= ~FS_XFLAG_NOATIME;
1074 if (flags & FS_NODUMP_FL)
1075 xflags |= FS_XFLAG_NODUMP;
1076 else
1077 xflags &= ~FS_XFLAG_NODUMP;
1078 if (flags & FS_DAX_FL)
1079 xflags |= FS_XFLAG_DAX;
1080 else
1081 xflags &= ~FS_XFLAG_DAX;
1082
1083 return xflags;
1084}
1085
1086STATIC unsigned int
1087xfs_di2lxflags(
1088 uint16_t di_flags,
1089 uint64_t di_flags2)
1090{
1091 unsigned int flags = 0;
1092
1093 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1094 flags |= FS_IMMUTABLE_FL;
1095 if (di_flags & XFS_DIFLAG_APPEND)
1096 flags |= FS_APPEND_FL;
1097 if (di_flags & XFS_DIFLAG_SYNC)
1098 flags |= FS_SYNC_FL;
1099 if (di_flags & XFS_DIFLAG_NOATIME)
1100 flags |= FS_NOATIME_FL;
1101 if (di_flags & XFS_DIFLAG_NODUMP)
1102 flags |= FS_NODUMP_FL;
1103 if (di_flags2 & XFS_DIFLAG2_DAX) {
1104 flags |= FS_DAX_FL;
1105 }
1106 return flags;
1107}
1108
1109static void
1110xfs_fill_fsxattr(
1111 struct xfs_inode *ip,
1112 bool attr,
1113 struct fsxattr *fa)
1114{
1115 struct xfs_ifork *ifp = attr ? ip->i_afp : &ip->i_df;
1116
1117 simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
1118 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
1119 fa->fsx_cowextsize = ip->i_d.di_cowextsize <<
1120 ip->i_mount->m_sb.sb_blocklog;
1121 fa->fsx_projid = ip->i_d.di_projid;
1122 if (ifp && (ifp->if_flags & XFS_IFEXTENTS))
1123 fa->fsx_nextents = xfs_iext_count(ifp);
1124 else
1125 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1126}
1127
1128STATIC int
1129xfs_ioc_fsgetxattr(
1130 xfs_inode_t *ip,
1131 int attr,
1132 void __user *arg)
1133{
1134 struct fsxattr fa;
1135
1136 xfs_ilock(ip, XFS_ILOCK_SHARED);
1137 xfs_fill_fsxattr(ip, attr, &fa);
1138 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1139
1140 if (copy_to_user(arg, &fa, sizeof(fa)))
1141 return -EFAULT;
1142 return 0;
1143}
1144
1145STATIC uint16_t
1146xfs_flags2diflags(
1147 struct xfs_inode *ip,
1148 unsigned int xflags)
1149{
1150 /* can't set PREALLOC this way, just preserve it */
1151 uint16_t di_flags =
1152 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
1153
1154 if (xflags & FS_XFLAG_IMMUTABLE)
1155 di_flags |= XFS_DIFLAG_IMMUTABLE;
1156 if (xflags & FS_XFLAG_APPEND)
1157 di_flags |= XFS_DIFLAG_APPEND;
1158 if (xflags & FS_XFLAG_SYNC)
1159 di_flags |= XFS_DIFLAG_SYNC;
1160 if (xflags & FS_XFLAG_NOATIME)
1161 di_flags |= XFS_DIFLAG_NOATIME;
1162 if (xflags & FS_XFLAG_NODUMP)
1163 di_flags |= XFS_DIFLAG_NODUMP;
1164 if (xflags & FS_XFLAG_NODEFRAG)
1165 di_flags |= XFS_DIFLAG_NODEFRAG;
1166 if (xflags & FS_XFLAG_FILESTREAM)
1167 di_flags |= XFS_DIFLAG_FILESTREAM;
1168 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1169 if (xflags & FS_XFLAG_RTINHERIT)
1170 di_flags |= XFS_DIFLAG_RTINHERIT;
1171 if (xflags & FS_XFLAG_NOSYMLINKS)
1172 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1173 if (xflags & FS_XFLAG_EXTSZINHERIT)
1174 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1175 if (xflags & FS_XFLAG_PROJINHERIT)
1176 di_flags |= XFS_DIFLAG_PROJINHERIT;
1177 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1178 if (xflags & FS_XFLAG_REALTIME)
1179 di_flags |= XFS_DIFLAG_REALTIME;
1180 if (xflags & FS_XFLAG_EXTSIZE)
1181 di_flags |= XFS_DIFLAG_EXTSIZE;
1182 }
1183
1184 return di_flags;
1185}
1186
1187STATIC uint64_t
1188xfs_flags2diflags2(
1189 struct xfs_inode *ip,
1190 unsigned int xflags)
1191{
1192 uint64_t di_flags2 =
1193 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
1194
1195 if (xflags & FS_XFLAG_DAX)
1196 di_flags2 |= XFS_DIFLAG2_DAX;
1197 if (xflags & FS_XFLAG_COWEXTSIZE)
1198 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1199
1200 return di_flags2;
1201}
1202
1203static int
1204xfs_ioctl_setattr_xflags(
1205 struct xfs_trans *tp,
1206 struct xfs_inode *ip,
1207 struct fsxattr *fa)
1208{
1209 struct xfs_mount *mp = ip->i_mount;
1210 uint64_t di_flags2;
1211
1212 /* Can't change realtime flag if any extents are allocated. */
1213 if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
1214 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1215 return -EINVAL;
1216
1217 /* If realtime flag is set then must have realtime device */
1218 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1219 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1220 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1221 return -EINVAL;
1222 }
1223
1224 /* Clear reflink if we are actually able to set the rt flag. */
1225 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1226 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1227
1228 /* Don't allow us to set DAX mode for a reflinked file for now. */
1229 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1230 return -EINVAL;
1231
1232 /* diflags2 only valid for v3 inodes. */
1233 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1234 if (di_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb))
1235 return -EINVAL;
1236
1237 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1238 ip->i_d.di_flags2 = di_flags2;
1239
1240 xfs_diflags_to_iflags(ip, false);
1241 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1242 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1243 XFS_STATS_INC(mp, xs_ig_attrchg);
1244 return 0;
1245}
1246
1247static void
1248xfs_ioctl_setattr_prepare_dax(
1249 struct xfs_inode *ip,
1250 struct fsxattr *fa)
1251{
1252 struct xfs_mount *mp = ip->i_mount;
1253 struct inode *inode = VFS_I(ip);
1254
1255 if (S_ISDIR(inode->i_mode))
1256 return;
1257
1258 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) ||
1259 (mp->m_flags & XFS_MOUNT_DAX_NEVER))
1260 return;
1261
1262 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1263 !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) ||
1264 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1265 (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)))
1266 d_mark_dontcache(inode);
1267}
1268
1269/*
1270 * Set up the transaction structure for the setattr operation, checking that we
1271 * have permission to do so. On success, return a clean transaction and the
1272 * inode locked exclusively ready for further operation specific checks. On
1273 * failure, return an error without modifying or locking the inode.
1274 */
1275static struct xfs_trans *
1276xfs_ioctl_setattr_get_trans(
1277 struct xfs_inode *ip)
1278{
1279 struct xfs_mount *mp = ip->i_mount;
1280 struct xfs_trans *tp;
1281 int error = -EROFS;
1282
1283 if (mp->m_flags & XFS_MOUNT_RDONLY)
1284 goto out_unlock;
1285 error = -EIO;
1286 if (XFS_FORCED_SHUTDOWN(mp))
1287 goto out_unlock;
1288
1289 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1290 if (error)
1291 goto out_unlock;
1292
1293 xfs_ilock(ip, XFS_ILOCK_EXCL);
1294 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1295
1296 /*
1297 * CAP_FOWNER overrides the following restrictions:
1298 *
1299 * The user ID of the calling process must be equal to the file owner
1300 * ID, except in cases where the CAP_FSETID capability is applicable.
1301 */
1302 if (!inode_owner_or_capable(VFS_I(ip))) {
1303 error = -EPERM;
1304 goto out_cancel;
1305 }
1306
1307 if (mp->m_flags & XFS_MOUNT_WSYNC)
1308 xfs_trans_set_sync(tp);
1309
1310 return tp;
1311
1312out_cancel:
1313 xfs_trans_cancel(tp);
1314out_unlock:
1315 return ERR_PTR(error);
1316}
1317
1318/*
1319 * extent size hint validation is somewhat cumbersome. Rules are:
1320 *
1321 * 1. extent size hint is only valid for directories and regular files
1322 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1323 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1324 * 4. can only be changed on regular files if no extents are allocated
1325 * 5. can be changed on directories at any time
1326 * 6. extsize hint of 0 turns off hints, clears inode flags.
1327 * 7. Extent size must be a multiple of the appropriate block size.
1328 * 8. for non-realtime files, the extent size hint must be limited
1329 * to half the AG size to avoid alignment extending the extent beyond the
1330 * limits of the AG.
1331 *
1332 * Please keep this function in sync with xfs_scrub_inode_extsize.
1333 */
1334static int
1335xfs_ioctl_setattr_check_extsize(
1336 struct xfs_inode *ip,
1337 struct fsxattr *fa)
1338{
1339 struct xfs_mount *mp = ip->i_mount;
1340 xfs_extlen_t size;
1341 xfs_fsblock_t extsize_fsb;
1342
1343 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1344 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1345 return -EINVAL;
1346
1347 if (fa->fsx_extsize == 0)
1348 return 0;
1349
1350 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1351 if (extsize_fsb > MAXEXTLEN)
1352 return -EINVAL;
1353
1354 if (XFS_IS_REALTIME_INODE(ip) ||
1355 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1356 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1357 } else {
1358 size = mp->m_sb.sb_blocksize;
1359 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1360 return -EINVAL;
1361 }
1362
1363 if (fa->fsx_extsize % size)
1364 return -EINVAL;
1365
1366 return 0;
1367}
1368
1369/*
1370 * CoW extent size hint validation rules are:
1371 *
1372 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1373 * The inode does not have to have any shared blocks, but it must be a v3.
1374 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1375 * for a directory, the hint is propagated to new files.
1376 * 3. Can be changed on files & directories at any time.
1377 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1378 * 5. Extent size must be a multiple of the appropriate block size.
1379 * 6. The extent size hint must be limited to half the AG size to avoid
1380 * alignment extending the extent beyond the limits of the AG.
1381 *
1382 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1383 */
1384static int
1385xfs_ioctl_setattr_check_cowextsize(
1386 struct xfs_inode *ip,
1387 struct fsxattr *fa)
1388{
1389 struct xfs_mount *mp = ip->i_mount;
1390 xfs_extlen_t size;
1391 xfs_fsblock_t cowextsize_fsb;
1392
1393 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1394 return 0;
1395
1396 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb))
1397 return -EINVAL;
1398
1399 if (fa->fsx_cowextsize == 0)
1400 return 0;
1401
1402 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1403 if (cowextsize_fsb > MAXEXTLEN)
1404 return -EINVAL;
1405
1406 size = mp->m_sb.sb_blocksize;
1407 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1408 return -EINVAL;
1409
1410 if (fa->fsx_cowextsize % size)
1411 return -EINVAL;
1412
1413 return 0;
1414}
1415
1416static int
1417xfs_ioctl_setattr_check_projid(
1418 struct xfs_inode *ip,
1419 struct fsxattr *fa)
1420{
1421 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1422 if (fa->fsx_projid > (uint16_t)-1 &&
1423 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1424 return -EINVAL;
1425 return 0;
1426}
1427
1428STATIC int
1429xfs_ioctl_setattr(
1430 xfs_inode_t *ip,
1431 struct fsxattr *fa)
1432{
1433 struct fsxattr old_fa;
1434 struct xfs_mount *mp = ip->i_mount;
1435 struct xfs_trans *tp;
1436 struct xfs_dquot *pdqp = NULL;
1437 struct xfs_dquot *olddquot = NULL;
1438 int code;
1439
1440 trace_xfs_ioctl_setattr(ip);
1441
1442 code = xfs_ioctl_setattr_check_projid(ip, fa);
1443 if (code)
1444 return code;
1445
1446 /*
1447 * If disk quotas is on, we make sure that the dquots do exist on disk,
1448 * before we start any other transactions. Trying to do this later
1449 * is messy. We don't care to take a readlock to look at the ids
1450 * in inode here, because we can't hold it across the trans_reserve.
1451 * If the IDs do change before we take the ilock, we're covered
1452 * because the i_*dquot fields will get updated anyway.
1453 */
1454 if (XFS_IS_QUOTA_ON(mp)) {
1455 code = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1456 VFS_I(ip)->i_gid, fa->fsx_projid,
1457 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1458 if (code)
1459 return code;
1460 }
1461
1462 xfs_ioctl_setattr_prepare_dax(ip, fa);
1463
1464 tp = xfs_ioctl_setattr_get_trans(ip);
1465 if (IS_ERR(tp)) {
1466 code = PTR_ERR(tp);
1467 goto error_free_dquots;
1468 }
1469
1470 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1471 ip->i_d.di_projid != fa->fsx_projid) {
1472 code = xfs_qm_vop_chown_reserve(tp, ip, NULL, NULL, pdqp,
1473 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1474 if (code) /* out of quota */
1475 goto error_trans_cancel;
1476 }
1477
1478 xfs_fill_fsxattr(ip, false, &old_fa);
1479 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa);
1480 if (code)
1481 goto error_trans_cancel;
1482
1483 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1484 if (code)
1485 goto error_trans_cancel;
1486
1487 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1488 if (code)
1489 goto error_trans_cancel;
1490
1491 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1492 if (code)
1493 goto error_trans_cancel;
1494
1495 /*
1496 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1497 * overrides the following restrictions:
1498 *
1499 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1500 * successful return from chown()
1501 */
1502
1503 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1504 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1505 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1506
1507 /* Change the ownerships and register project quota modifications */
1508 if (ip->i_d.di_projid != fa->fsx_projid) {
1509 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1510 olddquot = xfs_qm_vop_chown(tp, ip,
1511 &ip->i_pdquot, pdqp);
1512 }
1513 ip->i_d.di_projid = fa->fsx_projid;
1514 }
1515
1516 /*
1517 * Only set the extent size hint if we've already determined that the
1518 * extent size hint should be set on the inode. If no extent size flags
1519 * are set on the inode then unconditionally clear the extent size hint.
1520 */
1521 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1522 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1523 else
1524 ip->i_d.di_extsize = 0;
1525 if (xfs_sb_version_has_v3inode(&mp->m_sb) &&
1526 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1527 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1528 mp->m_sb.sb_blocklog;
1529 else
1530 ip->i_d.di_cowextsize = 0;
1531
1532 code = xfs_trans_commit(tp);
1533
1534 /*
1535 * Release any dquot(s) the inode had kept before chown.
1536 */
1537 xfs_qm_dqrele(olddquot);
1538 xfs_qm_dqrele(pdqp);
1539
1540 return code;
1541
1542error_trans_cancel:
1543 xfs_trans_cancel(tp);
1544error_free_dquots:
1545 xfs_qm_dqrele(pdqp);
1546 return code;
1547}
1548
1549STATIC int
1550xfs_ioc_fssetxattr(
1551 xfs_inode_t *ip,
1552 struct file *filp,
1553 void __user *arg)
1554{
1555 struct fsxattr fa;
1556 int error;
1557
1558 if (copy_from_user(&fa, arg, sizeof(fa)))
1559 return -EFAULT;
1560
1561 error = mnt_want_write_file(filp);
1562 if (error)
1563 return error;
1564 error = xfs_ioctl_setattr(ip, &fa);
1565 mnt_drop_write_file(filp);
1566 return error;
1567}
1568
1569STATIC int
1570xfs_ioc_getxflags(
1571 xfs_inode_t *ip,
1572 void __user *arg)
1573{
1574 unsigned int flags;
1575
1576 flags = xfs_di2lxflags(ip->i_d.di_flags, ip->i_d.di_flags2);
1577 if (copy_to_user(arg, &flags, sizeof(flags)))
1578 return -EFAULT;
1579 return 0;
1580}
1581
1582STATIC int
1583xfs_ioc_setxflags(
1584 struct xfs_inode *ip,
1585 struct file *filp,
1586 void __user *arg)
1587{
1588 struct xfs_trans *tp;
1589 struct fsxattr fa;
1590 struct fsxattr old_fa;
1591 unsigned int flags;
1592 int error;
1593
1594 if (copy_from_user(&flags, arg, sizeof(flags)))
1595 return -EFAULT;
1596
1597 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1598 FS_NOATIME_FL | FS_NODUMP_FL | \
1599 FS_SYNC_FL | FS_DAX_FL))
1600 return -EOPNOTSUPP;
1601
1602 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1603
1604 error = mnt_want_write_file(filp);
1605 if (error)
1606 return error;
1607
1608 xfs_ioctl_setattr_prepare_dax(ip, &fa);
1609
1610 tp = xfs_ioctl_setattr_get_trans(ip);
1611 if (IS_ERR(tp)) {
1612 error = PTR_ERR(tp);
1613 goto out_drop_write;
1614 }
1615
1616 xfs_fill_fsxattr(ip, false, &old_fa);
1617 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa);
1618 if (error) {
1619 xfs_trans_cancel(tp);
1620 goto out_drop_write;
1621 }
1622
1623 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1624 if (error) {
1625 xfs_trans_cancel(tp);
1626 goto out_drop_write;
1627 }
1628
1629 error = xfs_trans_commit(tp);
1630out_drop_write:
1631 mnt_drop_write_file(filp);
1632 return error;
1633}
1634
1635static bool
1636xfs_getbmap_format(
1637 struct kgetbmap *p,
1638 struct getbmapx __user *u,
1639 size_t recsize)
1640{
1641 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1642 put_user(p->bmv_block, &u->bmv_block) ||
1643 put_user(p->bmv_length, &u->bmv_length) ||
1644 put_user(0, &u->bmv_count) ||
1645 put_user(0, &u->bmv_entries))
1646 return false;
1647 if (recsize < sizeof(struct getbmapx))
1648 return true;
1649 if (put_user(0, &u->bmv_iflags) ||
1650 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1651 put_user(0, &u->bmv_unused1) ||
1652 put_user(0, &u->bmv_unused2))
1653 return false;
1654 return true;
1655}
1656
1657STATIC int
1658xfs_ioc_getbmap(
1659 struct file *file,
1660 unsigned int cmd,
1661 void __user *arg)
1662{
1663 struct getbmapx bmx = { 0 };
1664 struct kgetbmap *buf;
1665 size_t recsize;
1666 int error, i;
1667
1668 switch (cmd) {
1669 case XFS_IOC_GETBMAPA:
1670 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1671 /*FALLTHRU*/
1672 case XFS_IOC_GETBMAP:
1673 if (file->f_mode & FMODE_NOCMTIME)
1674 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1675 /* struct getbmap is a strict subset of struct getbmapx. */
1676 recsize = sizeof(struct getbmap);
1677 break;
1678 case XFS_IOC_GETBMAPX:
1679 recsize = sizeof(struct getbmapx);
1680 break;
1681 default:
1682 return -EINVAL;
1683 }
1684
1685 if (copy_from_user(&bmx, arg, recsize))
1686 return -EFAULT;
1687
1688 if (bmx.bmv_count < 2)
1689 return -EINVAL;
1690 if (bmx.bmv_count > ULONG_MAX / recsize)
1691 return -ENOMEM;
1692
1693 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1694 if (!buf)
1695 return -ENOMEM;
1696
1697 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1698 if (error)
1699 goto out_free_buf;
1700
1701 error = -EFAULT;
1702 if (copy_to_user(arg, &bmx, recsize))
1703 goto out_free_buf;
1704 arg += recsize;
1705
1706 for (i = 0; i < bmx.bmv_entries; i++) {
1707 if (!xfs_getbmap_format(buf + i, arg, recsize))
1708 goto out_free_buf;
1709 arg += recsize;
1710 }
1711
1712 error = 0;
1713out_free_buf:
1714 kmem_free(buf);
1715 return error;
1716}
1717
1718struct getfsmap_info {
1719 struct xfs_mount *mp;
1720 struct fsmap_head __user *data;
1721 unsigned int idx;
1722 __u32 last_flags;
1723};
1724
1725STATIC int
1726xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1727{
1728 struct getfsmap_info *info = priv;
1729 struct fsmap fm;
1730
1731 trace_xfs_getfsmap_mapping(info->mp, xfm);
1732
1733 info->last_flags = xfm->fmr_flags;
1734 xfs_fsmap_from_internal(&fm, xfm);
1735 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1736 sizeof(struct fsmap)))
1737 return -EFAULT;
1738
1739 return 0;
1740}
1741
1742STATIC int
1743xfs_ioc_getfsmap(
1744 struct xfs_inode *ip,
1745 struct fsmap_head __user *arg)
1746{
1747 struct getfsmap_info info = { NULL };
1748 struct xfs_fsmap_head xhead = {0};
1749 struct fsmap_head head;
1750 bool aborted = false;
1751 int error;
1752
1753 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1754 return -EFAULT;
1755 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1756 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1757 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1758 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1759 sizeof(head.fmh_keys[1].fmr_reserved)))
1760 return -EINVAL;
1761
1762 xhead.fmh_iflags = head.fmh_iflags;
1763 xhead.fmh_count = head.fmh_count;
1764 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1765 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1766
1767 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1768 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1769
1770 info.mp = ip->i_mount;
1771 info.data = arg;
1772 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1773 if (error == -ECANCELED) {
1774 error = 0;
1775 aborted = true;
1776 } else if (error)
1777 return error;
1778
1779 /* If we didn't abort, set the "last" flag in the last fmx */
1780 if (!aborted && info.idx) {
1781 info.last_flags |= FMR_OF_LAST;
1782 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1783 &info.last_flags, sizeof(info.last_flags)))
1784 return -EFAULT;
1785 }
1786
1787 /* copy back header */
1788 head.fmh_entries = xhead.fmh_entries;
1789 head.fmh_oflags = xhead.fmh_oflags;
1790 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1791 return -EFAULT;
1792
1793 return 0;
1794}
1795
1796STATIC int
1797xfs_ioc_scrub_metadata(
1798 struct xfs_inode *ip,
1799 void __user *arg)
1800{
1801 struct xfs_scrub_metadata scrub;
1802 int error;
1803
1804 if (!capable(CAP_SYS_ADMIN))
1805 return -EPERM;
1806
1807 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1808 return -EFAULT;
1809
1810 error = xfs_scrub_metadata(ip, &scrub);
1811 if (error)
1812 return error;
1813
1814 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1815 return -EFAULT;
1816
1817 return 0;
1818}
1819
1820int
1821xfs_ioc_swapext(
1822 xfs_swapext_t *sxp)
1823{
1824 xfs_inode_t *ip, *tip;
1825 struct fd f, tmp;
1826 int error = 0;
1827
1828 /* Pull information for the target fd */
1829 f = fdget((int)sxp->sx_fdtarget);
1830 if (!f.file) {
1831 error = -EINVAL;
1832 goto out;
1833 }
1834
1835 if (!(f.file->f_mode & FMODE_WRITE) ||
1836 !(f.file->f_mode & FMODE_READ) ||
1837 (f.file->f_flags & O_APPEND)) {
1838 error = -EBADF;
1839 goto out_put_file;
1840 }
1841
1842 tmp = fdget((int)sxp->sx_fdtmp);
1843 if (!tmp.file) {
1844 error = -EINVAL;
1845 goto out_put_file;
1846 }
1847
1848 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1849 !(tmp.file->f_mode & FMODE_READ) ||
1850 (tmp.file->f_flags & O_APPEND)) {
1851 error = -EBADF;
1852 goto out_put_tmp_file;
1853 }
1854
1855 if (IS_SWAPFILE(file_inode(f.file)) ||
1856 IS_SWAPFILE(file_inode(tmp.file))) {
1857 error = -EINVAL;
1858 goto out_put_tmp_file;
1859 }
1860
1861 /*
1862 * We need to ensure that the fds passed in point to XFS inodes
1863 * before we cast and access them as XFS structures as we have no
1864 * control over what the user passes us here.
1865 */
1866 if (f.file->f_op != &xfs_file_operations ||
1867 tmp.file->f_op != &xfs_file_operations) {
1868 error = -EINVAL;
1869 goto out_put_tmp_file;
1870 }
1871
1872 ip = XFS_I(file_inode(f.file));
1873 tip = XFS_I(file_inode(tmp.file));
1874
1875 if (ip->i_mount != tip->i_mount) {
1876 error = -EINVAL;
1877 goto out_put_tmp_file;
1878 }
1879
1880 if (ip->i_ino == tip->i_ino) {
1881 error = -EINVAL;
1882 goto out_put_tmp_file;
1883 }
1884
1885 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1886 error = -EIO;
1887 goto out_put_tmp_file;
1888 }
1889
1890 error = xfs_swap_extents(ip, tip, sxp);
1891
1892 out_put_tmp_file:
1893 fdput(tmp);
1894 out_put_file:
1895 fdput(f);
1896 out:
1897 return error;
1898}
1899
1900static int
1901xfs_ioc_getlabel(
1902 struct xfs_mount *mp,
1903 char __user *user_label)
1904{
1905 struct xfs_sb *sbp = &mp->m_sb;
1906 char label[XFSLABEL_MAX + 1];
1907
1908 /* Paranoia */
1909 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1910
1911 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1912 memset(label, 0, sizeof(label));
1913 spin_lock(&mp->m_sb_lock);
1914 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1915 spin_unlock(&mp->m_sb_lock);
1916
1917 if (copy_to_user(user_label, label, sizeof(label)))
1918 return -EFAULT;
1919 return 0;
1920}
1921
1922static int
1923xfs_ioc_setlabel(
1924 struct file *filp,
1925 struct xfs_mount *mp,
1926 char __user *newlabel)
1927{
1928 struct xfs_sb *sbp = &mp->m_sb;
1929 char label[XFSLABEL_MAX + 1];
1930 size_t len;
1931 int error;
1932
1933 if (!capable(CAP_SYS_ADMIN))
1934 return -EPERM;
1935 /*
1936 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1937 * smaller, at 12 bytes. We copy one more to be sure we find the
1938 * (required) NULL character to test the incoming label length.
1939 * NB: The on disk label doesn't need to be null terminated.
1940 */
1941 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1942 return -EFAULT;
1943 len = strnlen(label, XFSLABEL_MAX + 1);
1944 if (len > sizeof(sbp->sb_fname))
1945 return -EINVAL;
1946
1947 error = mnt_want_write_file(filp);
1948 if (error)
1949 return error;
1950
1951 spin_lock(&mp->m_sb_lock);
1952 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1953 memcpy(sbp->sb_fname, label, len);
1954 spin_unlock(&mp->m_sb_lock);
1955
1956 /*
1957 * Now we do several things to satisfy userspace.
1958 * In addition to normal logging of the primary superblock, we also
1959 * immediately write these changes to sector zero for the primary, then
1960 * update all backup supers (as xfs_db does for a label change), then
1961 * invalidate the block device page cache. This is so that any prior
1962 * buffered reads from userspace (i.e. from blkid) are invalidated,
1963 * and userspace will see the newly-written label.
1964 */
1965 error = xfs_sync_sb_buf(mp);
1966 if (error)
1967 goto out;
1968 /*
1969 * growfs also updates backup supers so lock against that.
1970 */
1971 mutex_lock(&mp->m_growlock);
1972 error = xfs_update_secondary_sbs(mp);
1973 mutex_unlock(&mp->m_growlock);
1974
1975 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1976
1977out:
1978 mnt_drop_write_file(filp);
1979 return error;
1980}
1981
1982static inline int
1983xfs_fs_eofblocks_from_user(
1984 struct xfs_fs_eofblocks *src,
1985 struct xfs_eofblocks *dst)
1986{
1987 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1988 return -EINVAL;
1989
1990 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1991 return -EINVAL;
1992
1993 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1994 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1995 return -EINVAL;
1996
1997 dst->eof_flags = src->eof_flags;
1998 dst->eof_prid = src->eof_prid;
1999 dst->eof_min_file_size = src->eof_min_file_size;
2000
2001 dst->eof_uid = INVALID_UID;
2002 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
2003 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
2004 if (!uid_valid(dst->eof_uid))
2005 return -EINVAL;
2006 }
2007
2008 dst->eof_gid = INVALID_GID;
2009 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
2010 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
2011 if (!gid_valid(dst->eof_gid))
2012 return -EINVAL;
2013 }
2014 return 0;
2015}
2016
2017/*
2018 * Note: some of the ioctl's return positive numbers as a
2019 * byte count indicating success, such as readlink_by_handle.
2020 * So we don't "sign flip" like most other routines. This means
2021 * true errors need to be returned as a negative value.
2022 */
2023long
2024xfs_file_ioctl(
2025 struct file *filp,
2026 unsigned int cmd,
2027 unsigned long p)
2028{
2029 struct inode *inode = file_inode(filp);
2030 struct xfs_inode *ip = XFS_I(inode);
2031 struct xfs_mount *mp = ip->i_mount;
2032 void __user *arg = (void __user *)p;
2033 int error;
2034
2035 trace_xfs_file_ioctl(ip);
2036
2037 switch (cmd) {
2038 case FITRIM:
2039 return xfs_ioc_trim(mp, arg);
2040 case FS_IOC_GETFSLABEL:
2041 return xfs_ioc_getlabel(mp, arg);
2042 case FS_IOC_SETFSLABEL:
2043 return xfs_ioc_setlabel(filp, mp, arg);
2044 case XFS_IOC_ALLOCSP:
2045 case XFS_IOC_FREESP:
2046 case XFS_IOC_ALLOCSP64:
2047 case XFS_IOC_FREESP64: {
2048 xfs_flock64_t bf;
2049
2050 if (copy_from_user(&bf, arg, sizeof(bf)))
2051 return -EFAULT;
2052 return xfs_ioc_space(filp, &bf);
2053 }
2054 case XFS_IOC_DIOINFO: {
2055 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
2056 struct dioattr da;
2057
2058 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
2059 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
2060
2061 if (copy_to_user(arg, &da, sizeof(da)))
2062 return -EFAULT;
2063 return 0;
2064 }
2065
2066 case XFS_IOC_FSBULKSTAT_SINGLE:
2067 case XFS_IOC_FSBULKSTAT:
2068 case XFS_IOC_FSINUMBERS:
2069 return xfs_ioc_fsbulkstat(mp, cmd, arg);
2070
2071 case XFS_IOC_BULKSTAT:
2072 return xfs_ioc_bulkstat(mp, cmd, arg);
2073 case XFS_IOC_INUMBERS:
2074 return xfs_ioc_inumbers(mp, cmd, arg);
2075
2076 case XFS_IOC_FSGEOMETRY_V1:
2077 return xfs_ioc_fsgeometry(mp, arg, 3);
2078 case XFS_IOC_FSGEOMETRY_V4:
2079 return xfs_ioc_fsgeometry(mp, arg, 4);
2080 case XFS_IOC_FSGEOMETRY:
2081 return xfs_ioc_fsgeometry(mp, arg, 5);
2082
2083 case XFS_IOC_AG_GEOMETRY:
2084 return xfs_ioc_ag_geometry(mp, arg);
2085
2086 case XFS_IOC_GETVERSION:
2087 return put_user(inode->i_generation, (int __user *)arg);
2088
2089 case XFS_IOC_FSGETXATTR:
2090 return xfs_ioc_fsgetxattr(ip, 0, arg);
2091 case XFS_IOC_FSGETXATTRA:
2092 return xfs_ioc_fsgetxattr(ip, 1, arg);
2093 case XFS_IOC_FSSETXATTR:
2094 return xfs_ioc_fssetxattr(ip, filp, arg);
2095 case XFS_IOC_GETXFLAGS:
2096 return xfs_ioc_getxflags(ip, arg);
2097 case XFS_IOC_SETXFLAGS:
2098 return xfs_ioc_setxflags(ip, filp, arg);
2099
2100 case XFS_IOC_GETBMAP:
2101 case XFS_IOC_GETBMAPA:
2102 case XFS_IOC_GETBMAPX:
2103 return xfs_ioc_getbmap(filp, cmd, arg);
2104
2105 case FS_IOC_GETFSMAP:
2106 return xfs_ioc_getfsmap(ip, arg);
2107
2108 case XFS_IOC_SCRUB_METADATA:
2109 return xfs_ioc_scrub_metadata(ip, arg);
2110
2111 case XFS_IOC_FD_TO_HANDLE:
2112 case XFS_IOC_PATH_TO_HANDLE:
2113 case XFS_IOC_PATH_TO_FSHANDLE: {
2114 xfs_fsop_handlereq_t hreq;
2115
2116 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2117 return -EFAULT;
2118 return xfs_find_handle(cmd, &hreq);
2119 }
2120 case XFS_IOC_OPEN_BY_HANDLE: {
2121 xfs_fsop_handlereq_t hreq;
2122
2123 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2124 return -EFAULT;
2125 return xfs_open_by_handle(filp, &hreq);
2126 }
2127
2128 case XFS_IOC_READLINK_BY_HANDLE: {
2129 xfs_fsop_handlereq_t hreq;
2130
2131 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2132 return -EFAULT;
2133 return xfs_readlink_by_handle(filp, &hreq);
2134 }
2135 case XFS_IOC_ATTRLIST_BY_HANDLE:
2136 return xfs_attrlist_by_handle(filp, arg);
2137
2138 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2139 return xfs_attrmulti_by_handle(filp, arg);
2140
2141 case XFS_IOC_SWAPEXT: {
2142 struct xfs_swapext sxp;
2143
2144 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2145 return -EFAULT;
2146 error = mnt_want_write_file(filp);
2147 if (error)
2148 return error;
2149 error = xfs_ioc_swapext(&sxp);
2150 mnt_drop_write_file(filp);
2151 return error;
2152 }
2153
2154 case XFS_IOC_FSCOUNTS: {
2155 xfs_fsop_counts_t out;
2156
2157 xfs_fs_counts(mp, &out);
2158
2159 if (copy_to_user(arg, &out, sizeof(out)))
2160 return -EFAULT;
2161 return 0;
2162 }
2163
2164 case XFS_IOC_SET_RESBLKS: {
2165 xfs_fsop_resblks_t inout;
2166 uint64_t in;
2167
2168 if (!capable(CAP_SYS_ADMIN))
2169 return -EPERM;
2170
2171 if (mp->m_flags & XFS_MOUNT_RDONLY)
2172 return -EROFS;
2173
2174 if (copy_from_user(&inout, arg, sizeof(inout)))
2175 return -EFAULT;
2176
2177 error = mnt_want_write_file(filp);
2178 if (error)
2179 return error;
2180
2181 /* input parameter is passed in resblks field of structure */
2182 in = inout.resblks;
2183 error = xfs_reserve_blocks(mp, &in, &inout);
2184 mnt_drop_write_file(filp);
2185 if (error)
2186 return error;
2187
2188 if (copy_to_user(arg, &inout, sizeof(inout)))
2189 return -EFAULT;
2190 return 0;
2191 }
2192
2193 case XFS_IOC_GET_RESBLKS: {
2194 xfs_fsop_resblks_t out;
2195
2196 if (!capable(CAP_SYS_ADMIN))
2197 return -EPERM;
2198
2199 error = xfs_reserve_blocks(mp, NULL, &out);
2200 if (error)
2201 return error;
2202
2203 if (copy_to_user(arg, &out, sizeof(out)))
2204 return -EFAULT;
2205
2206 return 0;
2207 }
2208
2209 case XFS_IOC_FSGROWFSDATA: {
2210 xfs_growfs_data_t in;
2211
2212 if (copy_from_user(&in, arg, sizeof(in)))
2213 return -EFAULT;
2214
2215 error = mnt_want_write_file(filp);
2216 if (error)
2217 return error;
2218 error = xfs_growfs_data(mp, &in);
2219 mnt_drop_write_file(filp);
2220 return error;
2221 }
2222
2223 case XFS_IOC_FSGROWFSLOG: {
2224 xfs_growfs_log_t in;
2225
2226 if (copy_from_user(&in, arg, sizeof(in)))
2227 return -EFAULT;
2228
2229 error = mnt_want_write_file(filp);
2230 if (error)
2231 return error;
2232 error = xfs_growfs_log(mp, &in);
2233 mnt_drop_write_file(filp);
2234 return error;
2235 }
2236
2237 case XFS_IOC_FSGROWFSRT: {
2238 xfs_growfs_rt_t in;
2239
2240 if (copy_from_user(&in, arg, sizeof(in)))
2241 return -EFAULT;
2242
2243 error = mnt_want_write_file(filp);
2244 if (error)
2245 return error;
2246 error = xfs_growfs_rt(mp, &in);
2247 mnt_drop_write_file(filp);
2248 return error;
2249 }
2250
2251 case XFS_IOC_GOINGDOWN: {
2252 uint32_t in;
2253
2254 if (!capable(CAP_SYS_ADMIN))
2255 return -EPERM;
2256
2257 if (get_user(in, (uint32_t __user *)arg))
2258 return -EFAULT;
2259
2260 return xfs_fs_goingdown(mp, in);
2261 }
2262
2263 case XFS_IOC_ERROR_INJECTION: {
2264 xfs_error_injection_t in;
2265
2266 if (!capable(CAP_SYS_ADMIN))
2267 return -EPERM;
2268
2269 if (copy_from_user(&in, arg, sizeof(in)))
2270 return -EFAULT;
2271
2272 return xfs_errortag_add(mp, in.errtag);
2273 }
2274
2275 case XFS_IOC_ERROR_CLEARALL:
2276 if (!capable(CAP_SYS_ADMIN))
2277 return -EPERM;
2278
2279 return xfs_errortag_clearall(mp);
2280
2281 case XFS_IOC_FREE_EOFBLOCKS: {
2282 struct xfs_fs_eofblocks eofb;
2283 struct xfs_eofblocks keofb;
2284
2285 if (!capable(CAP_SYS_ADMIN))
2286 return -EPERM;
2287
2288 if (mp->m_flags & XFS_MOUNT_RDONLY)
2289 return -EROFS;
2290
2291 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2292 return -EFAULT;
2293
2294 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2295 if (error)
2296 return error;
2297
2298 sb_start_write(mp->m_super);
2299 error = xfs_icache_free_eofblocks(mp, &keofb);
2300 sb_end_write(mp->m_super);
2301 return error;
2302 }
2303
2304 default:
2305 return -ENOTTY;
2306 }
2307}