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1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_bit.h"
21#include "xfs_log.h"
22#include "xfs_inum.h"
23#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_alloc.h"
27#include "xfs_mount.h"
28#include "xfs_bmap_btree.h"
29#include "xfs_dinode.h"
30#include "xfs_inode.h"
31#include "xfs_ioctl.h"
32#include "xfs_rtalloc.h"
33#include "xfs_itable.h"
34#include "xfs_error.h"
35#include "xfs_attr.h"
36#include "xfs_bmap.h"
37#include "xfs_buf_item.h"
38#include "xfs_utils.h"
39#include "xfs_dfrag.h"
40#include "xfs_fsops.h"
41#include "xfs_vnodeops.h"
42#include "xfs_discard.h"
43#include "xfs_quota.h"
44#include "xfs_inode_item.h"
45#include "xfs_export.h"
46#include "xfs_trace.h"
47
48#include <linux/capability.h>
49#include <linux/dcache.h>
50#include <linux/mount.h>
51#include <linux/namei.h>
52#include <linux/pagemap.h>
53#include <linux/slab.h>
54#include <linux/exportfs.h>
55
56/*
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
59 *
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
66 */
67int
68xfs_find_handle(
69 unsigned int cmd,
70 xfs_fsop_handlereq_t *hreq)
71{
72 int hsize;
73 xfs_handle_t handle;
74 struct inode *inode;
75 struct file *file = NULL;
76 struct path path;
77 int error;
78 struct xfs_inode *ip;
79
80 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 file = fget(hreq->fd);
82 if (!file)
83 return -EBADF;
84 inode = file->f_path.dentry->d_inode;
85 } else {
86 error = user_lpath((const char __user *)hreq->path, &path);
87 if (error)
88 return error;
89 inode = path.dentry->d_inode;
90 }
91 ip = XFS_I(inode);
92
93 /*
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
96 */
97 error = -EINVAL;
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 goto out_put;
100
101 error = -EBADF;
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
105 goto out_put;
106
107
108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109
110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 /*
112 * This handle only contains an fsid, zero the rest.
113 */
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
116 } else {
117 int lock_mode;
118
119 lock_mode = xfs_ilock_map_shared(ip);
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 xfs_iunlock_map_shared(ip, lock_mode);
126
127 hsize = XFS_HSIZE(handle);
128 }
129
130 error = -EFAULT;
131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
133 goto out_put;
134
135 error = 0;
136
137 out_put:
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 fput(file);
140 else
141 path_put(&path);
142 return error;
143}
144
145/*
146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
148 */
149STATIC int
150xfs_handle_acceptable(
151 void *context,
152 struct dentry *dentry)
153{
154 return 1;
155}
156
157/*
158 * Convert userspace handle data into a dentry.
159 */
160struct dentry *
161xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
164 u32 hlen)
165{
166 xfs_handle_t handle;
167 struct xfs_fid64 fid;
168
169 /*
170 * Only allow handle opens under a directory.
171 */
172 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
173 return ERR_PTR(-ENOTDIR);
174
175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
182
183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
186
187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
190}
191
192STATIC struct dentry *
193xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196{
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
198}
199
200int
201xfs_open_by_handle(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
204{
205 const struct cred *cred = current_cred();
206 int error;
207 int fd;
208 int permflag;
209 struct file *filp;
210 struct inode *inode;
211 struct dentry *dentry;
212
213 if (!capable(CAP_SYS_ADMIN))
214 return -XFS_ERROR(EPERM);
215
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 if (IS_ERR(dentry))
218 return PTR_ERR(dentry);
219 inode = dentry->d_inode;
220
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
223 error = -XFS_ERROR(EPERM);
224 goto out_dput;
225 }
226
227#if BITS_PER_LONG != 32
228 hreq->oflags |= O_LARGEFILE;
229#endif
230
231 /* Put open permission in namei format. */
232 permflag = hreq->oflags;
233 if ((permflag+1) & O_ACCMODE)
234 permflag++;
235 if (permflag & O_TRUNC)
236 permflag |= 2;
237
238 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
239 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
240 error = -XFS_ERROR(EPERM);
241 goto out_dput;
242 }
243
244 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
245 error = -XFS_ERROR(EACCES);
246 goto out_dput;
247 }
248
249 /* Can't write directories. */
250 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
251 error = -XFS_ERROR(EISDIR);
252 goto out_dput;
253 }
254
255 fd = get_unused_fd();
256 if (fd < 0) {
257 error = fd;
258 goto out_dput;
259 }
260
261 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
262 hreq->oflags, cred);
263 if (IS_ERR(filp)) {
264 put_unused_fd(fd);
265 return PTR_ERR(filp);
266 }
267
268 if (S_ISREG(inode->i_mode)) {
269 filp->f_flags |= O_NOATIME;
270 filp->f_mode |= FMODE_NOCMTIME;
271 }
272
273 fd_install(fd, filp);
274 return fd;
275
276 out_dput:
277 dput(dentry);
278 return error;
279}
280
281/*
282 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
283 * unused first argument.
284 */
285STATIC int
286do_readlink(
287 char __user *buffer,
288 int buflen,
289 const char *link)
290{
291 int len;
292
293 len = PTR_ERR(link);
294 if (IS_ERR(link))
295 goto out;
296
297 len = strlen(link);
298 if (len > (unsigned) buflen)
299 len = buflen;
300 if (copy_to_user(buffer, link, len))
301 len = -EFAULT;
302 out:
303 return len;
304}
305
306
307int
308xfs_readlink_by_handle(
309 struct file *parfilp,
310 xfs_fsop_handlereq_t *hreq)
311{
312 struct dentry *dentry;
313 __u32 olen;
314 void *link;
315 int error;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -XFS_ERROR(EPERM);
319
320 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
321 if (IS_ERR(dentry))
322 return PTR_ERR(dentry);
323
324 /* Restrict this handle operation to symlinks only. */
325 if (!S_ISLNK(dentry->d_inode->i_mode)) {
326 error = -XFS_ERROR(EINVAL);
327 goto out_dput;
328 }
329
330 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
331 error = -XFS_ERROR(EFAULT);
332 goto out_dput;
333 }
334
335 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
336 if (!link) {
337 error = -XFS_ERROR(ENOMEM);
338 goto out_dput;
339 }
340
341 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
342 if (error)
343 goto out_kfree;
344 error = do_readlink(hreq->ohandle, olen, link);
345 if (error)
346 goto out_kfree;
347
348 out_kfree:
349 kfree(link);
350 out_dput:
351 dput(dentry);
352 return error;
353}
354
355STATIC int
356xfs_fssetdm_by_handle(
357 struct file *parfilp,
358 void __user *arg)
359{
360 int error;
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
363 struct dentry *dentry;
364
365 if (!capable(CAP_MKNOD))
366 return -XFS_ERROR(EPERM);
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 return -XFS_ERROR(EFAULT);
369
370 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
371 if (IS_ERR(dentry))
372 return PTR_ERR(dentry);
373
374 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
375 error = -XFS_ERROR(EPERM);
376 goto out;
377 }
378
379 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
380 error = -XFS_ERROR(EFAULT);
381 goto out;
382 }
383
384 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
385 fsd.fsd_dmstate);
386
387 out:
388 dput(dentry);
389 return error;
390}
391
392STATIC int
393xfs_attrlist_by_handle(
394 struct file *parfilp,
395 void __user *arg)
396{
397 int error = -ENOMEM;
398 attrlist_cursor_kern_t *cursor;
399 xfs_fsop_attrlist_handlereq_t al_hreq;
400 struct dentry *dentry;
401 char *kbuf;
402
403 if (!capable(CAP_SYS_ADMIN))
404 return -XFS_ERROR(EPERM);
405 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
406 return -XFS_ERROR(EFAULT);
407 if (al_hreq.buflen > XATTR_LIST_MAX)
408 return -XFS_ERROR(EINVAL);
409
410 /*
411 * Reject flags, only allow namespaces.
412 */
413 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
414 return -XFS_ERROR(EINVAL);
415
416 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
417 if (IS_ERR(dentry))
418 return PTR_ERR(dentry);
419
420 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
421 if (!kbuf)
422 goto out_dput;
423
424 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
425 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
426 al_hreq.flags, cursor);
427 if (error)
428 goto out_kfree;
429
430 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
431 error = -EFAULT;
432
433 out_kfree:
434 kfree(kbuf);
435 out_dput:
436 dput(dentry);
437 return error;
438}
439
440int
441xfs_attrmulti_attr_get(
442 struct inode *inode,
443 unsigned char *name,
444 unsigned char __user *ubuf,
445 __uint32_t *len,
446 __uint32_t flags)
447{
448 unsigned char *kbuf;
449 int error = EFAULT;
450
451 if (*len > XATTR_SIZE_MAX)
452 return EINVAL;
453 kbuf = kmalloc(*len, GFP_KERNEL);
454 if (!kbuf)
455 return ENOMEM;
456
457 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
458 if (error)
459 goto out_kfree;
460
461 if (copy_to_user(ubuf, kbuf, *len))
462 error = EFAULT;
463
464 out_kfree:
465 kfree(kbuf);
466 return error;
467}
468
469int
470xfs_attrmulti_attr_set(
471 struct inode *inode,
472 unsigned char *name,
473 const unsigned char __user *ubuf,
474 __uint32_t len,
475 __uint32_t flags)
476{
477 unsigned char *kbuf;
478 int error = EFAULT;
479
480 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
481 return EPERM;
482 if (len > XATTR_SIZE_MAX)
483 return EINVAL;
484
485 kbuf = memdup_user(ubuf, len);
486 if (IS_ERR(kbuf))
487 return PTR_ERR(kbuf);
488
489 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
490
491 return error;
492}
493
494int
495xfs_attrmulti_attr_remove(
496 struct inode *inode,
497 unsigned char *name,
498 __uint32_t flags)
499{
500 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
501 return EPERM;
502 return xfs_attr_remove(XFS_I(inode), name, flags);
503}
504
505STATIC int
506xfs_attrmulti_by_handle(
507 struct file *parfilp,
508 void __user *arg)
509{
510 int error;
511 xfs_attr_multiop_t *ops;
512 xfs_fsop_attrmulti_handlereq_t am_hreq;
513 struct dentry *dentry;
514 unsigned int i, size;
515 unsigned char *attr_name;
516
517 if (!capable(CAP_SYS_ADMIN))
518 return -XFS_ERROR(EPERM);
519 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
520 return -XFS_ERROR(EFAULT);
521
522 /* overflow check */
523 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
524 return -E2BIG;
525
526 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
527 if (IS_ERR(dentry))
528 return PTR_ERR(dentry);
529
530 error = E2BIG;
531 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
532 if (!size || size > 16 * PAGE_SIZE)
533 goto out_dput;
534
535 ops = memdup_user(am_hreq.ops, size);
536 if (IS_ERR(ops)) {
537 error = PTR_ERR(ops);
538 goto out_dput;
539 }
540
541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
542 if (!attr_name)
543 goto out_kfree_ops;
544
545 error = 0;
546 for (i = 0; i < am_hreq.opcount; i++) {
547 ops[i].am_error = strncpy_from_user((char *)attr_name,
548 ops[i].am_attrname, MAXNAMELEN);
549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
550 error = -ERANGE;
551 if (ops[i].am_error < 0)
552 break;
553
554 switch (ops[i].am_opcode) {
555 case ATTR_OP_GET:
556 ops[i].am_error = xfs_attrmulti_attr_get(
557 dentry->d_inode, attr_name,
558 ops[i].am_attrvalue, &ops[i].am_length,
559 ops[i].am_flags);
560 break;
561 case ATTR_OP_SET:
562 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
563 if (ops[i].am_error)
564 break;
565 ops[i].am_error = xfs_attrmulti_attr_set(
566 dentry->d_inode, attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
568 ops[i].am_flags);
569 mnt_drop_write(parfilp->f_path.mnt);
570 break;
571 case ATTR_OP_REMOVE:
572 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
573 if (ops[i].am_error)
574 break;
575 ops[i].am_error = xfs_attrmulti_attr_remove(
576 dentry->d_inode, attr_name,
577 ops[i].am_flags);
578 mnt_drop_write(parfilp->f_path.mnt);
579 break;
580 default:
581 ops[i].am_error = EINVAL;
582 }
583 }
584
585 if (copy_to_user(am_hreq.ops, ops, size))
586 error = XFS_ERROR(EFAULT);
587
588 kfree(attr_name);
589 out_kfree_ops:
590 kfree(ops);
591 out_dput:
592 dput(dentry);
593 return -error;
594}
595
596int
597xfs_ioc_space(
598 struct xfs_inode *ip,
599 struct inode *inode,
600 struct file *filp,
601 int ioflags,
602 unsigned int cmd,
603 xfs_flock64_t *bf)
604{
605 int attr_flags = 0;
606 int error;
607
608 /*
609 * Only allow the sys admin to reserve space unless
610 * unwritten extents are enabled.
611 */
612 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
613 !capable(CAP_SYS_ADMIN))
614 return -XFS_ERROR(EPERM);
615
616 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
617 return -XFS_ERROR(EPERM);
618
619 if (!(filp->f_mode & FMODE_WRITE))
620 return -XFS_ERROR(EBADF);
621
622 if (!S_ISREG(inode->i_mode))
623 return -XFS_ERROR(EINVAL);
624
625 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
626 attr_flags |= XFS_ATTR_NONBLOCK;
627
628 if (filp->f_flags & O_DSYNC)
629 attr_flags |= XFS_ATTR_SYNC;
630
631 if (ioflags & IO_INVIS)
632 attr_flags |= XFS_ATTR_DMI;
633
634 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
635 return -error;
636}
637
638STATIC int
639xfs_ioc_bulkstat(
640 xfs_mount_t *mp,
641 unsigned int cmd,
642 void __user *arg)
643{
644 xfs_fsop_bulkreq_t bulkreq;
645 int count; /* # of records returned */
646 xfs_ino_t inlast; /* last inode number */
647 int done;
648 int error;
649
650 /* done = 1 if there are more stats to get and if bulkstat */
651 /* should be called again (unused here, but used in dmapi) */
652
653 if (!capable(CAP_SYS_ADMIN))
654 return -EPERM;
655
656 if (XFS_FORCED_SHUTDOWN(mp))
657 return -XFS_ERROR(EIO);
658
659 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
660 return -XFS_ERROR(EFAULT);
661
662 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
663 return -XFS_ERROR(EFAULT);
664
665 if ((count = bulkreq.icount) <= 0)
666 return -XFS_ERROR(EINVAL);
667
668 if (bulkreq.ubuffer == NULL)
669 return -XFS_ERROR(EINVAL);
670
671 if (cmd == XFS_IOC_FSINUMBERS)
672 error = xfs_inumbers(mp, &inlast, &count,
673 bulkreq.ubuffer, xfs_inumbers_fmt);
674 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
675 error = xfs_bulkstat_single(mp, &inlast,
676 bulkreq.ubuffer, &done);
677 else /* XFS_IOC_FSBULKSTAT */
678 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
679 sizeof(xfs_bstat_t), bulkreq.ubuffer,
680 &done);
681
682 if (error)
683 return -error;
684
685 if (bulkreq.ocount != NULL) {
686 if (copy_to_user(bulkreq.lastip, &inlast,
687 sizeof(xfs_ino_t)))
688 return -XFS_ERROR(EFAULT);
689
690 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
691 return -XFS_ERROR(EFAULT);
692 }
693
694 return 0;
695}
696
697STATIC int
698xfs_ioc_fsgeometry_v1(
699 xfs_mount_t *mp,
700 void __user *arg)
701{
702 xfs_fsop_geom_t fsgeo;
703 int error;
704
705 error = xfs_fs_geometry(mp, &fsgeo, 3);
706 if (error)
707 return -error;
708
709 /*
710 * Caller should have passed an argument of type
711 * xfs_fsop_geom_v1_t. This is a proper subset of the
712 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
713 */
714 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
715 return -XFS_ERROR(EFAULT);
716 return 0;
717}
718
719STATIC int
720xfs_ioc_fsgeometry(
721 xfs_mount_t *mp,
722 void __user *arg)
723{
724 xfs_fsop_geom_t fsgeo;
725 int error;
726
727 error = xfs_fs_geometry(mp, &fsgeo, 4);
728 if (error)
729 return -error;
730
731 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
732 return -XFS_ERROR(EFAULT);
733 return 0;
734}
735
736/*
737 * Linux extended inode flags interface.
738 */
739
740STATIC unsigned int
741xfs_merge_ioc_xflags(
742 unsigned int flags,
743 unsigned int start)
744{
745 unsigned int xflags = start;
746
747 if (flags & FS_IMMUTABLE_FL)
748 xflags |= XFS_XFLAG_IMMUTABLE;
749 else
750 xflags &= ~XFS_XFLAG_IMMUTABLE;
751 if (flags & FS_APPEND_FL)
752 xflags |= XFS_XFLAG_APPEND;
753 else
754 xflags &= ~XFS_XFLAG_APPEND;
755 if (flags & FS_SYNC_FL)
756 xflags |= XFS_XFLAG_SYNC;
757 else
758 xflags &= ~XFS_XFLAG_SYNC;
759 if (flags & FS_NOATIME_FL)
760 xflags |= XFS_XFLAG_NOATIME;
761 else
762 xflags &= ~XFS_XFLAG_NOATIME;
763 if (flags & FS_NODUMP_FL)
764 xflags |= XFS_XFLAG_NODUMP;
765 else
766 xflags &= ~XFS_XFLAG_NODUMP;
767
768 return xflags;
769}
770
771STATIC unsigned int
772xfs_di2lxflags(
773 __uint16_t di_flags)
774{
775 unsigned int flags = 0;
776
777 if (di_flags & XFS_DIFLAG_IMMUTABLE)
778 flags |= FS_IMMUTABLE_FL;
779 if (di_flags & XFS_DIFLAG_APPEND)
780 flags |= FS_APPEND_FL;
781 if (di_flags & XFS_DIFLAG_SYNC)
782 flags |= FS_SYNC_FL;
783 if (di_flags & XFS_DIFLAG_NOATIME)
784 flags |= FS_NOATIME_FL;
785 if (di_flags & XFS_DIFLAG_NODUMP)
786 flags |= FS_NODUMP_FL;
787 return flags;
788}
789
790STATIC int
791xfs_ioc_fsgetxattr(
792 xfs_inode_t *ip,
793 int attr,
794 void __user *arg)
795{
796 struct fsxattr fa;
797
798 memset(&fa, 0, sizeof(struct fsxattr));
799
800 xfs_ilock(ip, XFS_ILOCK_SHARED);
801 fa.fsx_xflags = xfs_ip2xflags(ip);
802 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
803 fa.fsx_projid = xfs_get_projid(ip);
804
805 if (attr) {
806 if (ip->i_afp) {
807 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
808 fa.fsx_nextents = ip->i_afp->if_bytes /
809 sizeof(xfs_bmbt_rec_t);
810 else
811 fa.fsx_nextents = ip->i_d.di_anextents;
812 } else
813 fa.fsx_nextents = 0;
814 } else {
815 if (ip->i_df.if_flags & XFS_IFEXTENTS)
816 fa.fsx_nextents = ip->i_df.if_bytes /
817 sizeof(xfs_bmbt_rec_t);
818 else
819 fa.fsx_nextents = ip->i_d.di_nextents;
820 }
821 xfs_iunlock(ip, XFS_ILOCK_SHARED);
822
823 if (copy_to_user(arg, &fa, sizeof(fa)))
824 return -EFAULT;
825 return 0;
826}
827
828STATIC void
829xfs_set_diflags(
830 struct xfs_inode *ip,
831 unsigned int xflags)
832{
833 unsigned int di_flags;
834
835 /* can't set PREALLOC this way, just preserve it */
836 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
837 if (xflags & XFS_XFLAG_IMMUTABLE)
838 di_flags |= XFS_DIFLAG_IMMUTABLE;
839 if (xflags & XFS_XFLAG_APPEND)
840 di_flags |= XFS_DIFLAG_APPEND;
841 if (xflags & XFS_XFLAG_SYNC)
842 di_flags |= XFS_DIFLAG_SYNC;
843 if (xflags & XFS_XFLAG_NOATIME)
844 di_flags |= XFS_DIFLAG_NOATIME;
845 if (xflags & XFS_XFLAG_NODUMP)
846 di_flags |= XFS_DIFLAG_NODUMP;
847 if (xflags & XFS_XFLAG_PROJINHERIT)
848 di_flags |= XFS_DIFLAG_PROJINHERIT;
849 if (xflags & XFS_XFLAG_NODEFRAG)
850 di_flags |= XFS_DIFLAG_NODEFRAG;
851 if (xflags & XFS_XFLAG_FILESTREAM)
852 di_flags |= XFS_DIFLAG_FILESTREAM;
853 if (S_ISDIR(ip->i_d.di_mode)) {
854 if (xflags & XFS_XFLAG_RTINHERIT)
855 di_flags |= XFS_DIFLAG_RTINHERIT;
856 if (xflags & XFS_XFLAG_NOSYMLINKS)
857 di_flags |= XFS_DIFLAG_NOSYMLINKS;
858 if (xflags & XFS_XFLAG_EXTSZINHERIT)
859 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
860 } else if (S_ISREG(ip->i_d.di_mode)) {
861 if (xflags & XFS_XFLAG_REALTIME)
862 di_flags |= XFS_DIFLAG_REALTIME;
863 if (xflags & XFS_XFLAG_EXTSIZE)
864 di_flags |= XFS_DIFLAG_EXTSIZE;
865 }
866
867 ip->i_d.di_flags = di_flags;
868}
869
870STATIC void
871xfs_diflags_to_linux(
872 struct xfs_inode *ip)
873{
874 struct inode *inode = VFS_I(ip);
875 unsigned int xflags = xfs_ip2xflags(ip);
876
877 if (xflags & XFS_XFLAG_IMMUTABLE)
878 inode->i_flags |= S_IMMUTABLE;
879 else
880 inode->i_flags &= ~S_IMMUTABLE;
881 if (xflags & XFS_XFLAG_APPEND)
882 inode->i_flags |= S_APPEND;
883 else
884 inode->i_flags &= ~S_APPEND;
885 if (xflags & XFS_XFLAG_SYNC)
886 inode->i_flags |= S_SYNC;
887 else
888 inode->i_flags &= ~S_SYNC;
889 if (xflags & XFS_XFLAG_NOATIME)
890 inode->i_flags |= S_NOATIME;
891 else
892 inode->i_flags &= ~S_NOATIME;
893}
894
895#define FSX_PROJID 1
896#define FSX_EXTSIZE 2
897#define FSX_XFLAGS 4
898#define FSX_NONBLOCK 8
899
900STATIC int
901xfs_ioctl_setattr(
902 xfs_inode_t *ip,
903 struct fsxattr *fa,
904 int mask)
905{
906 struct xfs_mount *mp = ip->i_mount;
907 struct xfs_trans *tp;
908 unsigned int lock_flags = 0;
909 struct xfs_dquot *udqp = NULL;
910 struct xfs_dquot *gdqp = NULL;
911 struct xfs_dquot *olddquot = NULL;
912 int code;
913
914 trace_xfs_ioctl_setattr(ip);
915
916 if (mp->m_flags & XFS_MOUNT_RDONLY)
917 return XFS_ERROR(EROFS);
918 if (XFS_FORCED_SHUTDOWN(mp))
919 return XFS_ERROR(EIO);
920
921 /*
922 * Disallow 32bit project ids when projid32bit feature is not enabled.
923 */
924 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
925 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
926 return XFS_ERROR(EINVAL);
927
928 /*
929 * If disk quotas is on, we make sure that the dquots do exist on disk,
930 * before we start any other transactions. Trying to do this later
931 * is messy. We don't care to take a readlock to look at the ids
932 * in inode here, because we can't hold it across the trans_reserve.
933 * If the IDs do change before we take the ilock, we're covered
934 * because the i_*dquot fields will get updated anyway.
935 */
936 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
937 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
938 ip->i_d.di_gid, fa->fsx_projid,
939 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
940 if (code)
941 return code;
942 }
943
944 /*
945 * For the other attributes, we acquire the inode lock and
946 * first do an error checking pass.
947 */
948 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
949 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
950 if (code)
951 goto error_return;
952
953 lock_flags = XFS_ILOCK_EXCL;
954 xfs_ilock(ip, lock_flags);
955
956 /*
957 * CAP_FOWNER overrides the following restrictions:
958 *
959 * The user ID of the calling process must be equal
960 * to the file owner ID, except in cases where the
961 * CAP_FSETID capability is applicable.
962 */
963 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
964 code = XFS_ERROR(EPERM);
965 goto error_return;
966 }
967
968 /*
969 * Do a quota reservation only if projid is actually going to change.
970 */
971 if (mask & FSX_PROJID) {
972 if (XFS_IS_QUOTA_RUNNING(mp) &&
973 XFS_IS_PQUOTA_ON(mp) &&
974 xfs_get_projid(ip) != fa->fsx_projid) {
975 ASSERT(tp);
976 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
977 capable(CAP_FOWNER) ?
978 XFS_QMOPT_FORCE_RES : 0);
979 if (code) /* out of quota */
980 goto error_return;
981 }
982 }
983
984 if (mask & FSX_EXTSIZE) {
985 /*
986 * Can't change extent size if any extents are allocated.
987 */
988 if (ip->i_d.di_nextents &&
989 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
990 fa->fsx_extsize)) {
991 code = XFS_ERROR(EINVAL); /* EFBIG? */
992 goto error_return;
993 }
994
995 /*
996 * Extent size must be a multiple of the appropriate block
997 * size, if set at all. It must also be smaller than the
998 * maximum extent size supported by the filesystem.
999 *
1000 * Also, for non-realtime files, limit the extent size hint to
1001 * half the size of the AGs in the filesystem so alignment
1002 * doesn't result in extents larger than an AG.
1003 */
1004 if (fa->fsx_extsize != 0) {
1005 xfs_extlen_t size;
1006 xfs_fsblock_t extsize_fsb;
1007
1008 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1009 if (extsize_fsb > MAXEXTLEN) {
1010 code = XFS_ERROR(EINVAL);
1011 goto error_return;
1012 }
1013
1014 if (XFS_IS_REALTIME_INODE(ip) ||
1015 ((mask & FSX_XFLAGS) &&
1016 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1017 size = mp->m_sb.sb_rextsize <<
1018 mp->m_sb.sb_blocklog;
1019 } else {
1020 size = mp->m_sb.sb_blocksize;
1021 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1022 code = XFS_ERROR(EINVAL);
1023 goto error_return;
1024 }
1025 }
1026
1027 if (fa->fsx_extsize % size) {
1028 code = XFS_ERROR(EINVAL);
1029 goto error_return;
1030 }
1031 }
1032 }
1033
1034
1035 if (mask & FSX_XFLAGS) {
1036 /*
1037 * Can't change realtime flag if any extents are allocated.
1038 */
1039 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1040 (XFS_IS_REALTIME_INODE(ip)) !=
1041 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1042 code = XFS_ERROR(EINVAL); /* EFBIG? */
1043 goto error_return;
1044 }
1045
1046 /*
1047 * If realtime flag is set then must have realtime data.
1048 */
1049 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1050 if ((mp->m_sb.sb_rblocks == 0) ||
1051 (mp->m_sb.sb_rextsize == 0) ||
1052 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1053 code = XFS_ERROR(EINVAL);
1054 goto error_return;
1055 }
1056 }
1057
1058 /*
1059 * Can't modify an immutable/append-only file unless
1060 * we have appropriate permission.
1061 */
1062 if ((ip->i_d.di_flags &
1063 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1064 (fa->fsx_xflags &
1065 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1066 !capable(CAP_LINUX_IMMUTABLE)) {
1067 code = XFS_ERROR(EPERM);
1068 goto error_return;
1069 }
1070 }
1071
1072 xfs_trans_ijoin(tp, ip);
1073
1074 /*
1075 * Change file ownership. Must be the owner or privileged.
1076 */
1077 if (mask & FSX_PROJID) {
1078 /*
1079 * CAP_FSETID overrides the following restrictions:
1080 *
1081 * The set-user-ID and set-group-ID bits of a file will be
1082 * cleared upon successful return from chown()
1083 */
1084 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1085 !capable(CAP_FSETID))
1086 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1087
1088 /*
1089 * Change the ownerships and register quota modifications
1090 * in the transaction.
1091 */
1092 if (xfs_get_projid(ip) != fa->fsx_projid) {
1093 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1094 olddquot = xfs_qm_vop_chown(tp, ip,
1095 &ip->i_gdquot, gdqp);
1096 }
1097 xfs_set_projid(ip, fa->fsx_projid);
1098
1099 /*
1100 * We may have to rev the inode as well as
1101 * the superblock version number since projids didn't
1102 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1103 */
1104 if (ip->i_d.di_version == 1)
1105 xfs_bump_ino_vers2(tp, ip);
1106 }
1107
1108 }
1109
1110 if (mask & FSX_EXTSIZE)
1111 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1112 if (mask & FSX_XFLAGS) {
1113 xfs_set_diflags(ip, fa->fsx_xflags);
1114 xfs_diflags_to_linux(ip);
1115 }
1116
1117 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1118 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1119
1120 XFS_STATS_INC(xs_ig_attrchg);
1121
1122 /*
1123 * If this is a synchronous mount, make sure that the
1124 * transaction goes to disk before returning to the user.
1125 * This is slightly sub-optimal in that truncates require
1126 * two sync transactions instead of one for wsync filesystems.
1127 * One for the truncate and one for the timestamps since we
1128 * don't want to change the timestamps unless we're sure the
1129 * truncate worked. Truncates are less than 1% of the laddis
1130 * mix so this probably isn't worth the trouble to optimize.
1131 */
1132 if (mp->m_flags & XFS_MOUNT_WSYNC)
1133 xfs_trans_set_sync(tp);
1134 code = xfs_trans_commit(tp, 0);
1135 xfs_iunlock(ip, lock_flags);
1136
1137 /*
1138 * Release any dquot(s) the inode had kept before chown.
1139 */
1140 xfs_qm_dqrele(olddquot);
1141 xfs_qm_dqrele(udqp);
1142 xfs_qm_dqrele(gdqp);
1143
1144 return code;
1145
1146 error_return:
1147 xfs_qm_dqrele(udqp);
1148 xfs_qm_dqrele(gdqp);
1149 xfs_trans_cancel(tp, 0);
1150 if (lock_flags)
1151 xfs_iunlock(ip, lock_flags);
1152 return code;
1153}
1154
1155STATIC int
1156xfs_ioc_fssetxattr(
1157 xfs_inode_t *ip,
1158 struct file *filp,
1159 void __user *arg)
1160{
1161 struct fsxattr fa;
1162 unsigned int mask;
1163
1164 if (copy_from_user(&fa, arg, sizeof(fa)))
1165 return -EFAULT;
1166
1167 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1168 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1169 mask |= FSX_NONBLOCK;
1170
1171 return -xfs_ioctl_setattr(ip, &fa, mask);
1172}
1173
1174STATIC int
1175xfs_ioc_getxflags(
1176 xfs_inode_t *ip,
1177 void __user *arg)
1178{
1179 unsigned int flags;
1180
1181 flags = xfs_di2lxflags(ip->i_d.di_flags);
1182 if (copy_to_user(arg, &flags, sizeof(flags)))
1183 return -EFAULT;
1184 return 0;
1185}
1186
1187STATIC int
1188xfs_ioc_setxflags(
1189 xfs_inode_t *ip,
1190 struct file *filp,
1191 void __user *arg)
1192{
1193 struct fsxattr fa;
1194 unsigned int flags;
1195 unsigned int mask;
1196
1197 if (copy_from_user(&flags, arg, sizeof(flags)))
1198 return -EFAULT;
1199
1200 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1201 FS_NOATIME_FL | FS_NODUMP_FL | \
1202 FS_SYNC_FL))
1203 return -EOPNOTSUPP;
1204
1205 mask = FSX_XFLAGS;
1206 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1207 mask |= FSX_NONBLOCK;
1208 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1209
1210 return -xfs_ioctl_setattr(ip, &fa, mask);
1211}
1212
1213STATIC int
1214xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1215{
1216 struct getbmap __user *base = *ap;
1217
1218 /* copy only getbmap portion (not getbmapx) */
1219 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1220 return XFS_ERROR(EFAULT);
1221
1222 *ap += sizeof(struct getbmap);
1223 return 0;
1224}
1225
1226STATIC int
1227xfs_ioc_getbmap(
1228 struct xfs_inode *ip,
1229 int ioflags,
1230 unsigned int cmd,
1231 void __user *arg)
1232{
1233 struct getbmapx bmx;
1234 int error;
1235
1236 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1237 return -XFS_ERROR(EFAULT);
1238
1239 if (bmx.bmv_count < 2)
1240 return -XFS_ERROR(EINVAL);
1241
1242 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1243 if (ioflags & IO_INVIS)
1244 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1245
1246 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1247 (struct getbmap *)arg+1);
1248 if (error)
1249 return -error;
1250
1251 /* copy back header - only size of getbmap */
1252 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1253 return -XFS_ERROR(EFAULT);
1254 return 0;
1255}
1256
1257STATIC int
1258xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1259{
1260 struct getbmapx __user *base = *ap;
1261
1262 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1263 return XFS_ERROR(EFAULT);
1264
1265 *ap += sizeof(struct getbmapx);
1266 return 0;
1267}
1268
1269STATIC int
1270xfs_ioc_getbmapx(
1271 struct xfs_inode *ip,
1272 void __user *arg)
1273{
1274 struct getbmapx bmx;
1275 int error;
1276
1277 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1278 return -XFS_ERROR(EFAULT);
1279
1280 if (bmx.bmv_count < 2)
1281 return -XFS_ERROR(EINVAL);
1282
1283 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1284 return -XFS_ERROR(EINVAL);
1285
1286 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1287 (struct getbmapx *)arg+1);
1288 if (error)
1289 return -error;
1290
1291 /* copy back header */
1292 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1293 return -XFS_ERROR(EFAULT);
1294
1295 return 0;
1296}
1297
1298/*
1299 * Note: some of the ioctl's return positive numbers as a
1300 * byte count indicating success, such as readlink_by_handle.
1301 * So we don't "sign flip" like most other routines. This means
1302 * true errors need to be returned as a negative value.
1303 */
1304long
1305xfs_file_ioctl(
1306 struct file *filp,
1307 unsigned int cmd,
1308 unsigned long p)
1309{
1310 struct inode *inode = filp->f_path.dentry->d_inode;
1311 struct xfs_inode *ip = XFS_I(inode);
1312 struct xfs_mount *mp = ip->i_mount;
1313 void __user *arg = (void __user *)p;
1314 int ioflags = 0;
1315 int error;
1316
1317 if (filp->f_mode & FMODE_NOCMTIME)
1318 ioflags |= IO_INVIS;
1319
1320 trace_xfs_file_ioctl(ip);
1321
1322 switch (cmd) {
1323 case FITRIM:
1324 return xfs_ioc_trim(mp, arg);
1325 case XFS_IOC_ALLOCSP:
1326 case XFS_IOC_FREESP:
1327 case XFS_IOC_RESVSP:
1328 case XFS_IOC_UNRESVSP:
1329 case XFS_IOC_ALLOCSP64:
1330 case XFS_IOC_FREESP64:
1331 case XFS_IOC_RESVSP64:
1332 case XFS_IOC_UNRESVSP64:
1333 case XFS_IOC_ZERO_RANGE: {
1334 xfs_flock64_t bf;
1335
1336 if (copy_from_user(&bf, arg, sizeof(bf)))
1337 return -XFS_ERROR(EFAULT);
1338 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1339 }
1340 case XFS_IOC_DIOINFO: {
1341 struct dioattr da;
1342 xfs_buftarg_t *target =
1343 XFS_IS_REALTIME_INODE(ip) ?
1344 mp->m_rtdev_targp : mp->m_ddev_targp;
1345
1346 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1347 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1348
1349 if (copy_to_user(arg, &da, sizeof(da)))
1350 return -XFS_ERROR(EFAULT);
1351 return 0;
1352 }
1353
1354 case XFS_IOC_FSBULKSTAT_SINGLE:
1355 case XFS_IOC_FSBULKSTAT:
1356 case XFS_IOC_FSINUMBERS:
1357 return xfs_ioc_bulkstat(mp, cmd, arg);
1358
1359 case XFS_IOC_FSGEOMETRY_V1:
1360 return xfs_ioc_fsgeometry_v1(mp, arg);
1361
1362 case XFS_IOC_FSGEOMETRY:
1363 return xfs_ioc_fsgeometry(mp, arg);
1364
1365 case XFS_IOC_GETVERSION:
1366 return put_user(inode->i_generation, (int __user *)arg);
1367
1368 case XFS_IOC_FSGETXATTR:
1369 return xfs_ioc_fsgetxattr(ip, 0, arg);
1370 case XFS_IOC_FSGETXATTRA:
1371 return xfs_ioc_fsgetxattr(ip, 1, arg);
1372 case XFS_IOC_FSSETXATTR:
1373 return xfs_ioc_fssetxattr(ip, filp, arg);
1374 case XFS_IOC_GETXFLAGS:
1375 return xfs_ioc_getxflags(ip, arg);
1376 case XFS_IOC_SETXFLAGS:
1377 return xfs_ioc_setxflags(ip, filp, arg);
1378
1379 case XFS_IOC_FSSETDM: {
1380 struct fsdmidata dmi;
1381
1382 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1383 return -XFS_ERROR(EFAULT);
1384
1385 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1386 dmi.fsd_dmstate);
1387 return -error;
1388 }
1389
1390 case XFS_IOC_GETBMAP:
1391 case XFS_IOC_GETBMAPA:
1392 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1393
1394 case XFS_IOC_GETBMAPX:
1395 return xfs_ioc_getbmapx(ip, arg);
1396
1397 case XFS_IOC_FD_TO_HANDLE:
1398 case XFS_IOC_PATH_TO_HANDLE:
1399 case XFS_IOC_PATH_TO_FSHANDLE: {
1400 xfs_fsop_handlereq_t hreq;
1401
1402 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1403 return -XFS_ERROR(EFAULT);
1404 return xfs_find_handle(cmd, &hreq);
1405 }
1406 case XFS_IOC_OPEN_BY_HANDLE: {
1407 xfs_fsop_handlereq_t hreq;
1408
1409 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1410 return -XFS_ERROR(EFAULT);
1411 return xfs_open_by_handle(filp, &hreq);
1412 }
1413 case XFS_IOC_FSSETDM_BY_HANDLE:
1414 return xfs_fssetdm_by_handle(filp, arg);
1415
1416 case XFS_IOC_READLINK_BY_HANDLE: {
1417 xfs_fsop_handlereq_t hreq;
1418
1419 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1420 return -XFS_ERROR(EFAULT);
1421 return xfs_readlink_by_handle(filp, &hreq);
1422 }
1423 case XFS_IOC_ATTRLIST_BY_HANDLE:
1424 return xfs_attrlist_by_handle(filp, arg);
1425
1426 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1427 return xfs_attrmulti_by_handle(filp, arg);
1428
1429 case XFS_IOC_SWAPEXT: {
1430 struct xfs_swapext sxp;
1431
1432 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1433 return -XFS_ERROR(EFAULT);
1434 error = xfs_swapext(&sxp);
1435 return -error;
1436 }
1437
1438 case XFS_IOC_FSCOUNTS: {
1439 xfs_fsop_counts_t out;
1440
1441 error = xfs_fs_counts(mp, &out);
1442 if (error)
1443 return -error;
1444
1445 if (copy_to_user(arg, &out, sizeof(out)))
1446 return -XFS_ERROR(EFAULT);
1447 return 0;
1448 }
1449
1450 case XFS_IOC_SET_RESBLKS: {
1451 xfs_fsop_resblks_t inout;
1452 __uint64_t in;
1453
1454 if (!capable(CAP_SYS_ADMIN))
1455 return -EPERM;
1456
1457 if (mp->m_flags & XFS_MOUNT_RDONLY)
1458 return -XFS_ERROR(EROFS);
1459
1460 if (copy_from_user(&inout, arg, sizeof(inout)))
1461 return -XFS_ERROR(EFAULT);
1462
1463 /* input parameter is passed in resblks field of structure */
1464 in = inout.resblks;
1465 error = xfs_reserve_blocks(mp, &in, &inout);
1466 if (error)
1467 return -error;
1468
1469 if (copy_to_user(arg, &inout, sizeof(inout)))
1470 return -XFS_ERROR(EFAULT);
1471 return 0;
1472 }
1473
1474 case XFS_IOC_GET_RESBLKS: {
1475 xfs_fsop_resblks_t out;
1476
1477 if (!capable(CAP_SYS_ADMIN))
1478 return -EPERM;
1479
1480 error = xfs_reserve_blocks(mp, NULL, &out);
1481 if (error)
1482 return -error;
1483
1484 if (copy_to_user(arg, &out, sizeof(out)))
1485 return -XFS_ERROR(EFAULT);
1486
1487 return 0;
1488 }
1489
1490 case XFS_IOC_FSGROWFSDATA: {
1491 xfs_growfs_data_t in;
1492
1493 if (copy_from_user(&in, arg, sizeof(in)))
1494 return -XFS_ERROR(EFAULT);
1495
1496 error = xfs_growfs_data(mp, &in);
1497 return -error;
1498 }
1499
1500 case XFS_IOC_FSGROWFSLOG: {
1501 xfs_growfs_log_t in;
1502
1503 if (copy_from_user(&in, arg, sizeof(in)))
1504 return -XFS_ERROR(EFAULT);
1505
1506 error = xfs_growfs_log(mp, &in);
1507 return -error;
1508 }
1509
1510 case XFS_IOC_FSGROWFSRT: {
1511 xfs_growfs_rt_t in;
1512
1513 if (copy_from_user(&in, arg, sizeof(in)))
1514 return -XFS_ERROR(EFAULT);
1515
1516 error = xfs_growfs_rt(mp, &in);
1517 return -error;
1518 }
1519
1520 case XFS_IOC_GOINGDOWN: {
1521 __uint32_t in;
1522
1523 if (!capable(CAP_SYS_ADMIN))
1524 return -EPERM;
1525
1526 if (get_user(in, (__uint32_t __user *)arg))
1527 return -XFS_ERROR(EFAULT);
1528
1529 error = xfs_fs_goingdown(mp, in);
1530 return -error;
1531 }
1532
1533 case XFS_IOC_ERROR_INJECTION: {
1534 xfs_error_injection_t in;
1535
1536 if (!capable(CAP_SYS_ADMIN))
1537 return -EPERM;
1538
1539 if (copy_from_user(&in, arg, sizeof(in)))
1540 return -XFS_ERROR(EFAULT);
1541
1542 error = xfs_errortag_add(in.errtag, mp);
1543 return -error;
1544 }
1545
1546 case XFS_IOC_ERROR_CLEARALL:
1547 if (!capable(CAP_SYS_ADMIN))
1548 return -EPERM;
1549
1550 error = xfs_errortag_clearall(mp, 1);
1551 return -error;
1552
1553 default:
1554 return -ENOTTY;
1555 }
1556}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_inode.h"
14#include "xfs_rtalloc.h"
15#include "xfs_iwalk.h"
16#include "xfs_itable.h"
17#include "xfs_error.h"
18#include "xfs_da_format.h"
19#include "xfs_da_btree.h"
20#include "xfs_attr.h"
21#include "xfs_bmap.h"
22#include "xfs_bmap_util.h"
23#include "xfs_fsops.h"
24#include "xfs_discard.h"
25#include "xfs_quota.h"
26#include "xfs_export.h"
27#include "xfs_trace.h"
28#include "xfs_icache.h"
29#include "xfs_trans.h"
30#include "xfs_acl.h"
31#include "xfs_btree.h"
32#include <linux/fsmap.h>
33#include "xfs_fsmap.h"
34#include "scrub/xfs_scrub.h"
35#include "xfs_sb.h"
36#include "xfs_ag.h"
37#include "xfs_health.h"
38#include "xfs_reflink.h"
39#include "xfs_ioctl.h"
40#include "xfs_xattr.h"
41#include "xfs_rtbitmap.h"
42
43#include <linux/mount.h>
44#include <linux/namei.h>
45#include <linux/fileattr.h>
46
47/*
48 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
49 * a file or fs handle.
50 *
51 * XFS_IOC_PATH_TO_FSHANDLE
52 * returns fs handle for a mount point or path within that mount point
53 * XFS_IOC_FD_TO_HANDLE
54 * returns full handle for a FD opened in user space
55 * XFS_IOC_PATH_TO_HANDLE
56 * returns full handle for a path
57 */
58int
59xfs_find_handle(
60 unsigned int cmd,
61 xfs_fsop_handlereq_t *hreq)
62{
63 int hsize;
64 xfs_handle_t handle;
65 struct inode *inode;
66 struct fd f = {NULL};
67 struct path path;
68 int error;
69 struct xfs_inode *ip;
70
71 if (cmd == XFS_IOC_FD_TO_HANDLE) {
72 f = fdget(hreq->fd);
73 if (!f.file)
74 return -EBADF;
75 inode = file_inode(f.file);
76 } else {
77 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
78 if (error)
79 return error;
80 inode = d_inode(path.dentry);
81 }
82 ip = XFS_I(inode);
83
84 /*
85 * We can only generate handles for inodes residing on a XFS filesystem,
86 * and only for regular files, directories or symbolic links.
87 */
88 error = -EINVAL;
89 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
90 goto out_put;
91
92 error = -EBADF;
93 if (!S_ISREG(inode->i_mode) &&
94 !S_ISDIR(inode->i_mode) &&
95 !S_ISLNK(inode->i_mode))
96 goto out_put;
97
98
99 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
100
101 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
102 /*
103 * This handle only contains an fsid, zero the rest.
104 */
105 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
106 hsize = sizeof(xfs_fsid_t);
107 } else {
108 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
109 sizeof(handle.ha_fid.fid_len);
110 handle.ha_fid.fid_pad = 0;
111 handle.ha_fid.fid_gen = inode->i_generation;
112 handle.ha_fid.fid_ino = ip->i_ino;
113 hsize = sizeof(xfs_handle_t);
114 }
115
116 error = -EFAULT;
117 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
118 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
119 goto out_put;
120
121 error = 0;
122
123 out_put:
124 if (cmd == XFS_IOC_FD_TO_HANDLE)
125 fdput(f);
126 else
127 path_put(&path);
128 return error;
129}
130
131/*
132 * No need to do permission checks on the various pathname components
133 * as the handle operations are privileged.
134 */
135STATIC int
136xfs_handle_acceptable(
137 void *context,
138 struct dentry *dentry)
139{
140 return 1;
141}
142
143/*
144 * Convert userspace handle data into a dentry.
145 */
146struct dentry *
147xfs_handle_to_dentry(
148 struct file *parfilp,
149 void __user *uhandle,
150 u32 hlen)
151{
152 xfs_handle_t handle;
153 struct xfs_fid64 fid;
154
155 /*
156 * Only allow handle opens under a directory.
157 */
158 if (!S_ISDIR(file_inode(parfilp)->i_mode))
159 return ERR_PTR(-ENOTDIR);
160
161 if (hlen != sizeof(xfs_handle_t))
162 return ERR_PTR(-EINVAL);
163 if (copy_from_user(&handle, uhandle, hlen))
164 return ERR_PTR(-EFAULT);
165 if (handle.ha_fid.fid_len !=
166 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
167 return ERR_PTR(-EINVAL);
168
169 memset(&fid, 0, sizeof(struct fid));
170 fid.ino = handle.ha_fid.fid_ino;
171 fid.gen = handle.ha_fid.fid_gen;
172
173 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
174 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
175 xfs_handle_acceptable, NULL);
176}
177
178STATIC struct dentry *
179xfs_handlereq_to_dentry(
180 struct file *parfilp,
181 xfs_fsop_handlereq_t *hreq)
182{
183 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
184}
185
186int
187xfs_open_by_handle(
188 struct file *parfilp,
189 xfs_fsop_handlereq_t *hreq)
190{
191 const struct cred *cred = current_cred();
192 int error;
193 int fd;
194 int permflag;
195 struct file *filp;
196 struct inode *inode;
197 struct dentry *dentry;
198 fmode_t fmode;
199 struct path path;
200
201 if (!capable(CAP_SYS_ADMIN))
202 return -EPERM;
203
204 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
205 if (IS_ERR(dentry))
206 return PTR_ERR(dentry);
207 inode = d_inode(dentry);
208
209 /* Restrict xfs_open_by_handle to directories & regular files. */
210 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
211 error = -EPERM;
212 goto out_dput;
213 }
214
215#if BITS_PER_LONG != 32
216 hreq->oflags |= O_LARGEFILE;
217#endif
218
219 permflag = hreq->oflags;
220 fmode = OPEN_FMODE(permflag);
221 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
222 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
223 error = -EPERM;
224 goto out_dput;
225 }
226
227 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
228 error = -EPERM;
229 goto out_dput;
230 }
231
232 /* Can't write directories. */
233 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
234 error = -EISDIR;
235 goto out_dput;
236 }
237
238 fd = get_unused_fd_flags(0);
239 if (fd < 0) {
240 error = fd;
241 goto out_dput;
242 }
243
244 path.mnt = parfilp->f_path.mnt;
245 path.dentry = dentry;
246 filp = dentry_open(&path, hreq->oflags, cred);
247 dput(dentry);
248 if (IS_ERR(filp)) {
249 put_unused_fd(fd);
250 return PTR_ERR(filp);
251 }
252
253 if (S_ISREG(inode->i_mode)) {
254 filp->f_flags |= O_NOATIME;
255 filp->f_mode |= FMODE_NOCMTIME;
256 }
257
258 fd_install(fd, filp);
259 return fd;
260
261 out_dput:
262 dput(dentry);
263 return error;
264}
265
266int
267xfs_readlink_by_handle(
268 struct file *parfilp,
269 xfs_fsop_handlereq_t *hreq)
270{
271 struct dentry *dentry;
272 __u32 olen;
273 int error;
274
275 if (!capable(CAP_SYS_ADMIN))
276 return -EPERM;
277
278 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
279 if (IS_ERR(dentry))
280 return PTR_ERR(dentry);
281
282 /* Restrict this handle operation to symlinks only. */
283 if (!d_is_symlink(dentry)) {
284 error = -EINVAL;
285 goto out_dput;
286 }
287
288 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
289 error = -EFAULT;
290 goto out_dput;
291 }
292
293 error = vfs_readlink(dentry, hreq->ohandle, olen);
294
295 out_dput:
296 dput(dentry);
297 return error;
298}
299
300/*
301 * Format an attribute and copy it out to the user's buffer.
302 * Take care to check values and protect against them changing later,
303 * we may be reading them directly out of a user buffer.
304 */
305static void
306xfs_ioc_attr_put_listent(
307 struct xfs_attr_list_context *context,
308 int flags,
309 unsigned char *name,
310 int namelen,
311 int valuelen)
312{
313 struct xfs_attrlist *alist = context->buffer;
314 struct xfs_attrlist_ent *aep;
315 int arraytop;
316
317 ASSERT(!context->seen_enough);
318 ASSERT(context->count >= 0);
319 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
320 ASSERT(context->firstu >= sizeof(*alist));
321 ASSERT(context->firstu <= context->bufsize);
322
323 /*
324 * Only list entries in the right namespace.
325 */
326 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
327 return;
328
329 arraytop = sizeof(*alist) +
330 context->count * sizeof(alist->al_offset[0]);
331
332 /* decrement by the actual bytes used by the attr */
333 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
334 namelen + 1, sizeof(uint32_t));
335 if (context->firstu < arraytop) {
336 trace_xfs_attr_list_full(context);
337 alist->al_more = 1;
338 context->seen_enough = 1;
339 return;
340 }
341
342 aep = context->buffer + context->firstu;
343 aep->a_valuelen = valuelen;
344 memcpy(aep->a_name, name, namelen);
345 aep->a_name[namelen] = 0;
346 alist->al_offset[context->count++] = context->firstu;
347 alist->al_count = context->count;
348 trace_xfs_attr_list_add(context);
349}
350
351static unsigned int
352xfs_attr_filter(
353 u32 ioc_flags)
354{
355 if (ioc_flags & XFS_IOC_ATTR_ROOT)
356 return XFS_ATTR_ROOT;
357 if (ioc_flags & XFS_IOC_ATTR_SECURE)
358 return XFS_ATTR_SECURE;
359 return 0;
360}
361
362static unsigned int
363xfs_attr_flags(
364 u32 ioc_flags)
365{
366 if (ioc_flags & XFS_IOC_ATTR_CREATE)
367 return XATTR_CREATE;
368 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
369 return XATTR_REPLACE;
370 return 0;
371}
372
373int
374xfs_ioc_attr_list(
375 struct xfs_inode *dp,
376 void __user *ubuf,
377 size_t bufsize,
378 int flags,
379 struct xfs_attrlist_cursor __user *ucursor)
380{
381 struct xfs_attr_list_context context = { };
382 struct xfs_attrlist *alist;
383 void *buffer;
384 int error;
385
386 if (bufsize < sizeof(struct xfs_attrlist) ||
387 bufsize > XFS_XATTR_LIST_MAX)
388 return -EINVAL;
389
390 /*
391 * Reject flags, only allow namespaces.
392 */
393 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
394 return -EINVAL;
395 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
396 return -EINVAL;
397
398 /*
399 * Validate the cursor.
400 */
401 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
402 return -EFAULT;
403 if (context.cursor.pad1 || context.cursor.pad2)
404 return -EINVAL;
405 if (!context.cursor.initted &&
406 (context.cursor.hashval || context.cursor.blkno ||
407 context.cursor.offset))
408 return -EINVAL;
409
410 buffer = kvzalloc(bufsize, GFP_KERNEL);
411 if (!buffer)
412 return -ENOMEM;
413
414 /*
415 * Initialize the output buffer.
416 */
417 context.dp = dp;
418 context.resynch = 1;
419 context.attr_filter = xfs_attr_filter(flags);
420 context.buffer = buffer;
421 context.bufsize = round_down(bufsize, sizeof(uint32_t));
422 context.firstu = context.bufsize;
423 context.put_listent = xfs_ioc_attr_put_listent;
424
425 alist = context.buffer;
426 alist->al_count = 0;
427 alist->al_more = 0;
428 alist->al_offset[0] = context.bufsize;
429
430 error = xfs_attr_list(&context);
431 if (error)
432 goto out_free;
433
434 if (copy_to_user(ubuf, buffer, bufsize) ||
435 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
436 error = -EFAULT;
437out_free:
438 kvfree(buffer);
439 return error;
440}
441
442STATIC int
443xfs_attrlist_by_handle(
444 struct file *parfilp,
445 struct xfs_fsop_attrlist_handlereq __user *p)
446{
447 struct xfs_fsop_attrlist_handlereq al_hreq;
448 struct dentry *dentry;
449 int error = -ENOMEM;
450
451 if (!capable(CAP_SYS_ADMIN))
452 return -EPERM;
453 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
454 return -EFAULT;
455
456 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
457 if (IS_ERR(dentry))
458 return PTR_ERR(dentry);
459
460 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
461 al_hreq.buflen, al_hreq.flags, &p->pos);
462 dput(dentry);
463 return error;
464}
465
466static int
467xfs_attrmulti_attr_get(
468 struct inode *inode,
469 unsigned char *name,
470 unsigned char __user *ubuf,
471 uint32_t *len,
472 uint32_t flags)
473{
474 struct xfs_da_args args = {
475 .dp = XFS_I(inode),
476 .attr_filter = xfs_attr_filter(flags),
477 .attr_flags = xfs_attr_flags(flags),
478 .name = name,
479 .namelen = strlen(name),
480 .valuelen = *len,
481 };
482 int error;
483
484 if (*len > XFS_XATTR_SIZE_MAX)
485 return -EINVAL;
486
487 error = xfs_attr_get(&args);
488 if (error)
489 goto out_kfree;
490
491 *len = args.valuelen;
492 if (copy_to_user(ubuf, args.value, args.valuelen))
493 error = -EFAULT;
494
495out_kfree:
496 kvfree(args.value);
497 return error;
498}
499
500static int
501xfs_attrmulti_attr_set(
502 struct inode *inode,
503 unsigned char *name,
504 const unsigned char __user *ubuf,
505 uint32_t len,
506 uint32_t flags)
507{
508 struct xfs_da_args args = {
509 .dp = XFS_I(inode),
510 .attr_filter = xfs_attr_filter(flags),
511 .attr_flags = xfs_attr_flags(flags),
512 .name = name,
513 .namelen = strlen(name),
514 };
515 int error;
516
517 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
518 return -EPERM;
519
520 if (ubuf) {
521 if (len > XFS_XATTR_SIZE_MAX)
522 return -EINVAL;
523 args.value = memdup_user(ubuf, len);
524 if (IS_ERR(args.value))
525 return PTR_ERR(args.value);
526 args.valuelen = len;
527 }
528
529 error = xfs_attr_change(&args);
530 if (!error && (flags & XFS_IOC_ATTR_ROOT))
531 xfs_forget_acl(inode, name);
532 kfree(args.value);
533 return error;
534}
535
536int
537xfs_ioc_attrmulti_one(
538 struct file *parfilp,
539 struct inode *inode,
540 uint32_t opcode,
541 void __user *uname,
542 void __user *value,
543 uint32_t *len,
544 uint32_t flags)
545{
546 unsigned char *name;
547 int error;
548
549 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
550 return -EINVAL;
551
552 name = strndup_user(uname, MAXNAMELEN);
553 if (IS_ERR(name))
554 return PTR_ERR(name);
555
556 switch (opcode) {
557 case ATTR_OP_GET:
558 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
559 break;
560 case ATTR_OP_REMOVE:
561 value = NULL;
562 *len = 0;
563 fallthrough;
564 case ATTR_OP_SET:
565 error = mnt_want_write_file(parfilp);
566 if (error)
567 break;
568 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
569 mnt_drop_write_file(parfilp);
570 break;
571 default:
572 error = -EINVAL;
573 break;
574 }
575
576 kfree(name);
577 return error;
578}
579
580STATIC int
581xfs_attrmulti_by_handle(
582 struct file *parfilp,
583 void __user *arg)
584{
585 int error;
586 xfs_attr_multiop_t *ops;
587 xfs_fsop_attrmulti_handlereq_t am_hreq;
588 struct dentry *dentry;
589 unsigned int i, size;
590
591 if (!capable(CAP_SYS_ADMIN))
592 return -EPERM;
593 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
594 return -EFAULT;
595
596 /* overflow check */
597 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
598 return -E2BIG;
599
600 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
601 if (IS_ERR(dentry))
602 return PTR_ERR(dentry);
603
604 error = -E2BIG;
605 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
606 if (!size || size > 16 * PAGE_SIZE)
607 goto out_dput;
608
609 ops = memdup_user(am_hreq.ops, size);
610 if (IS_ERR(ops)) {
611 error = PTR_ERR(ops);
612 goto out_dput;
613 }
614
615 error = 0;
616 for (i = 0; i < am_hreq.opcount; i++) {
617 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
618 d_inode(dentry), ops[i].am_opcode,
619 ops[i].am_attrname, ops[i].am_attrvalue,
620 &ops[i].am_length, ops[i].am_flags);
621 }
622
623 if (copy_to_user(am_hreq.ops, ops, size))
624 error = -EFAULT;
625
626 kfree(ops);
627 out_dput:
628 dput(dentry);
629 return error;
630}
631
632/* Return 0 on success or positive error */
633int
634xfs_fsbulkstat_one_fmt(
635 struct xfs_ibulk *breq,
636 const struct xfs_bulkstat *bstat)
637{
638 struct xfs_bstat bs1;
639
640 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
641 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
642 return -EFAULT;
643 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
644}
645
646int
647xfs_fsinumbers_fmt(
648 struct xfs_ibulk *breq,
649 const struct xfs_inumbers *igrp)
650{
651 struct xfs_inogrp ig1;
652
653 xfs_inumbers_to_inogrp(&ig1, igrp);
654 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
655 return -EFAULT;
656 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
657}
658
659STATIC int
660xfs_ioc_fsbulkstat(
661 struct file *file,
662 unsigned int cmd,
663 void __user *arg)
664{
665 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
666 struct xfs_fsop_bulkreq bulkreq;
667 struct xfs_ibulk breq = {
668 .mp = mp,
669 .idmap = file_mnt_idmap(file),
670 .ocount = 0,
671 };
672 xfs_ino_t lastino;
673 int error;
674
675 /* done = 1 if there are more stats to get and if bulkstat */
676 /* should be called again (unused here, but used in dmapi) */
677
678 if (!capable(CAP_SYS_ADMIN))
679 return -EPERM;
680
681 if (xfs_is_shutdown(mp))
682 return -EIO;
683
684 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
685 return -EFAULT;
686
687 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
688 return -EFAULT;
689
690 if (bulkreq.icount <= 0)
691 return -EINVAL;
692
693 if (bulkreq.ubuffer == NULL)
694 return -EINVAL;
695
696 breq.ubuffer = bulkreq.ubuffer;
697 breq.icount = bulkreq.icount;
698
699 /*
700 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
701 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
702 * that *lastip contains either zero or the number of the last inode to
703 * be examined by the previous call and return results starting with
704 * the next inode after that. The new bulk request back end functions
705 * take the inode to start with, so we have to compute the startino
706 * parameter from lastino to maintain correct function. lastino == 0
707 * is a special case because it has traditionally meant "first inode
708 * in filesystem".
709 */
710 if (cmd == XFS_IOC_FSINUMBERS) {
711 breq.startino = lastino ? lastino + 1 : 0;
712 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
713 lastino = breq.startino - 1;
714 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
715 breq.startino = lastino;
716 breq.icount = 1;
717 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
718 } else { /* XFS_IOC_FSBULKSTAT */
719 breq.startino = lastino ? lastino + 1 : 0;
720 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
721 lastino = breq.startino - 1;
722 }
723
724 if (error)
725 return error;
726
727 if (bulkreq.lastip != NULL &&
728 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
729 return -EFAULT;
730
731 if (bulkreq.ocount != NULL &&
732 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
733 return -EFAULT;
734
735 return 0;
736}
737
738/* Return 0 on success or positive error */
739static int
740xfs_bulkstat_fmt(
741 struct xfs_ibulk *breq,
742 const struct xfs_bulkstat *bstat)
743{
744 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
745 return -EFAULT;
746 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
747}
748
749/*
750 * Check the incoming bulk request @hdr from userspace and initialize the
751 * internal @breq bulk request appropriately. Returns 0 if the bulk request
752 * should proceed; -ECANCELED if there's nothing to do; or the usual
753 * negative error code.
754 */
755static int
756xfs_bulk_ireq_setup(
757 struct xfs_mount *mp,
758 const struct xfs_bulk_ireq *hdr,
759 struct xfs_ibulk *breq,
760 void __user *ubuffer)
761{
762 if (hdr->icount == 0 ||
763 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
764 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
765 return -EINVAL;
766
767 breq->startino = hdr->ino;
768 breq->ubuffer = ubuffer;
769 breq->icount = hdr->icount;
770 breq->ocount = 0;
771 breq->flags = 0;
772
773 /*
774 * The @ino parameter is a special value, so we must look it up here.
775 * We're not allowed to have IREQ_AGNO, and we only return one inode
776 * worth of data.
777 */
778 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
779 if (hdr->flags & XFS_BULK_IREQ_AGNO)
780 return -EINVAL;
781
782 switch (hdr->ino) {
783 case XFS_BULK_IREQ_SPECIAL_ROOT:
784 breq->startino = mp->m_sb.sb_rootino;
785 break;
786 default:
787 return -EINVAL;
788 }
789 breq->icount = 1;
790 }
791
792 /*
793 * The IREQ_AGNO flag means that we only want results from a given AG.
794 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
795 * beyond the specified AG then we return no results.
796 */
797 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
798 if (hdr->agno >= mp->m_sb.sb_agcount)
799 return -EINVAL;
800
801 if (breq->startino == 0)
802 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
803 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
804 return -EINVAL;
805
806 breq->flags |= XFS_IBULK_SAME_AG;
807
808 /* Asking for an inode past the end of the AG? We're done! */
809 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
810 return -ECANCELED;
811 } else if (hdr->agno)
812 return -EINVAL;
813
814 /* Asking for an inode past the end of the FS? We're done! */
815 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
816 return -ECANCELED;
817
818 if (hdr->flags & XFS_BULK_IREQ_NREXT64)
819 breq->flags |= XFS_IBULK_NREXT64;
820
821 return 0;
822}
823
824/*
825 * Update the userspace bulk request @hdr to reflect the end state of the
826 * internal bulk request @breq.
827 */
828static void
829xfs_bulk_ireq_teardown(
830 struct xfs_bulk_ireq *hdr,
831 struct xfs_ibulk *breq)
832{
833 hdr->ino = breq->startino;
834 hdr->ocount = breq->ocount;
835}
836
837/* Handle the v5 bulkstat ioctl. */
838STATIC int
839xfs_ioc_bulkstat(
840 struct file *file,
841 unsigned int cmd,
842 struct xfs_bulkstat_req __user *arg)
843{
844 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
845 struct xfs_bulk_ireq hdr;
846 struct xfs_ibulk breq = {
847 .mp = mp,
848 .idmap = file_mnt_idmap(file),
849 };
850 int error;
851
852 if (!capable(CAP_SYS_ADMIN))
853 return -EPERM;
854
855 if (xfs_is_shutdown(mp))
856 return -EIO;
857
858 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
859 return -EFAULT;
860
861 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
862 if (error == -ECANCELED)
863 goto out_teardown;
864 if (error < 0)
865 return error;
866
867 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
868 if (error)
869 return error;
870
871out_teardown:
872 xfs_bulk_ireq_teardown(&hdr, &breq);
873 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
874 return -EFAULT;
875
876 return 0;
877}
878
879STATIC int
880xfs_inumbers_fmt(
881 struct xfs_ibulk *breq,
882 const struct xfs_inumbers *igrp)
883{
884 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
885 return -EFAULT;
886 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
887}
888
889/* Handle the v5 inumbers ioctl. */
890STATIC int
891xfs_ioc_inumbers(
892 struct xfs_mount *mp,
893 unsigned int cmd,
894 struct xfs_inumbers_req __user *arg)
895{
896 struct xfs_bulk_ireq hdr;
897 struct xfs_ibulk breq = {
898 .mp = mp,
899 };
900 int error;
901
902 if (!capable(CAP_SYS_ADMIN))
903 return -EPERM;
904
905 if (xfs_is_shutdown(mp))
906 return -EIO;
907
908 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
909 return -EFAULT;
910
911 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
912 if (error == -ECANCELED)
913 goto out_teardown;
914 if (error < 0)
915 return error;
916
917 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
918 if (error)
919 return error;
920
921out_teardown:
922 xfs_bulk_ireq_teardown(&hdr, &breq);
923 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
924 return -EFAULT;
925
926 return 0;
927}
928
929STATIC int
930xfs_ioc_fsgeometry(
931 struct xfs_mount *mp,
932 void __user *arg,
933 int struct_version)
934{
935 struct xfs_fsop_geom fsgeo;
936 size_t len;
937
938 xfs_fs_geometry(mp, &fsgeo, struct_version);
939
940 if (struct_version <= 3)
941 len = sizeof(struct xfs_fsop_geom_v1);
942 else if (struct_version == 4)
943 len = sizeof(struct xfs_fsop_geom_v4);
944 else {
945 xfs_fsop_geom_health(mp, &fsgeo);
946 len = sizeof(fsgeo);
947 }
948
949 if (copy_to_user(arg, &fsgeo, len))
950 return -EFAULT;
951 return 0;
952}
953
954STATIC int
955xfs_ioc_ag_geometry(
956 struct xfs_mount *mp,
957 void __user *arg)
958{
959 struct xfs_perag *pag;
960 struct xfs_ag_geometry ageo;
961 int error;
962
963 if (copy_from_user(&ageo, arg, sizeof(ageo)))
964 return -EFAULT;
965 if (ageo.ag_flags)
966 return -EINVAL;
967 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
968 return -EINVAL;
969
970 pag = xfs_perag_get(mp, ageo.ag_number);
971 if (!pag)
972 return -EINVAL;
973
974 error = xfs_ag_get_geometry(pag, &ageo);
975 xfs_perag_put(pag);
976 if (error)
977 return error;
978
979 if (copy_to_user(arg, &ageo, sizeof(ageo)))
980 return -EFAULT;
981 return 0;
982}
983
984/*
985 * Linux extended inode flags interface.
986 */
987
988static void
989xfs_fill_fsxattr(
990 struct xfs_inode *ip,
991 int whichfork,
992 struct fileattr *fa)
993{
994 struct xfs_mount *mp = ip->i_mount;
995 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
996
997 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
998
999 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
1000 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1001 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
1002 /*
1003 * Don't let a misaligned extent size hint on a directory
1004 * escape to userspace if it won't pass the setattr checks
1005 * later.
1006 */
1007 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
1008 xfs_extlen_to_rtxmod(mp, ip->i_extsize) > 0) {
1009 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
1010 FS_XFLAG_EXTSZINHERIT);
1011 fa->fsx_extsize = 0;
1012 } else {
1013 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1014 }
1015 }
1016
1017 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1018 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
1019 fa->fsx_projid = ip->i_projid;
1020 if (ifp && !xfs_need_iread_extents(ifp))
1021 fa->fsx_nextents = xfs_iext_count(ifp);
1022 else
1023 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1024}
1025
1026STATIC int
1027xfs_ioc_fsgetxattra(
1028 xfs_inode_t *ip,
1029 void __user *arg)
1030{
1031 struct fileattr fa;
1032
1033 xfs_ilock(ip, XFS_ILOCK_SHARED);
1034 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
1035 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1036
1037 return copy_fsxattr_to_user(&fa, arg);
1038}
1039
1040int
1041xfs_fileattr_get(
1042 struct dentry *dentry,
1043 struct fileattr *fa)
1044{
1045 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1046
1047 if (d_is_special(dentry))
1048 return -ENOTTY;
1049
1050 xfs_ilock(ip, XFS_ILOCK_SHARED);
1051 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
1052 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1053
1054 return 0;
1055}
1056
1057STATIC uint16_t
1058xfs_flags2diflags(
1059 struct xfs_inode *ip,
1060 unsigned int xflags)
1061{
1062 /* can't set PREALLOC this way, just preserve it */
1063 uint16_t di_flags =
1064 (ip->i_diflags & XFS_DIFLAG_PREALLOC);
1065
1066 if (xflags & FS_XFLAG_IMMUTABLE)
1067 di_flags |= XFS_DIFLAG_IMMUTABLE;
1068 if (xflags & FS_XFLAG_APPEND)
1069 di_flags |= XFS_DIFLAG_APPEND;
1070 if (xflags & FS_XFLAG_SYNC)
1071 di_flags |= XFS_DIFLAG_SYNC;
1072 if (xflags & FS_XFLAG_NOATIME)
1073 di_flags |= XFS_DIFLAG_NOATIME;
1074 if (xflags & FS_XFLAG_NODUMP)
1075 di_flags |= XFS_DIFLAG_NODUMP;
1076 if (xflags & FS_XFLAG_NODEFRAG)
1077 di_flags |= XFS_DIFLAG_NODEFRAG;
1078 if (xflags & FS_XFLAG_FILESTREAM)
1079 di_flags |= XFS_DIFLAG_FILESTREAM;
1080 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1081 if (xflags & FS_XFLAG_RTINHERIT)
1082 di_flags |= XFS_DIFLAG_RTINHERIT;
1083 if (xflags & FS_XFLAG_NOSYMLINKS)
1084 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1085 if (xflags & FS_XFLAG_EXTSZINHERIT)
1086 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1087 if (xflags & FS_XFLAG_PROJINHERIT)
1088 di_flags |= XFS_DIFLAG_PROJINHERIT;
1089 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1090 if (xflags & FS_XFLAG_REALTIME)
1091 di_flags |= XFS_DIFLAG_REALTIME;
1092 if (xflags & FS_XFLAG_EXTSIZE)
1093 di_flags |= XFS_DIFLAG_EXTSIZE;
1094 }
1095
1096 return di_flags;
1097}
1098
1099STATIC uint64_t
1100xfs_flags2diflags2(
1101 struct xfs_inode *ip,
1102 unsigned int xflags)
1103{
1104 uint64_t di_flags2 =
1105 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
1106 XFS_DIFLAG2_BIGTIME |
1107 XFS_DIFLAG2_NREXT64));
1108
1109 if (xflags & FS_XFLAG_DAX)
1110 di_flags2 |= XFS_DIFLAG2_DAX;
1111 if (xflags & FS_XFLAG_COWEXTSIZE)
1112 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1113
1114 return di_flags2;
1115}
1116
1117static int
1118xfs_ioctl_setattr_xflags(
1119 struct xfs_trans *tp,
1120 struct xfs_inode *ip,
1121 struct fileattr *fa)
1122{
1123 struct xfs_mount *mp = ip->i_mount;
1124 bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME);
1125 uint64_t i_flags2;
1126
1127 if (rtflag != XFS_IS_REALTIME_INODE(ip)) {
1128 /* Can't change realtime flag if any extents are allocated. */
1129 if (ip->i_df.if_nextents || ip->i_delayed_blks)
1130 return -EINVAL;
1131 }
1132
1133 if (rtflag) {
1134 /* If realtime flag is set then must have realtime device */
1135 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1136 xfs_extlen_to_rtxmod(mp, ip->i_extsize))
1137 return -EINVAL;
1138
1139 /* Clear reflink if we are actually able to set the rt flag. */
1140 if (xfs_is_reflink_inode(ip))
1141 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
1142 }
1143
1144 /* diflags2 only valid for v3 inodes. */
1145 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1146 if (i_flags2 && !xfs_has_v3inodes(mp))
1147 return -EINVAL;
1148
1149 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1150 ip->i_diflags2 = i_flags2;
1151
1152 xfs_diflags_to_iflags(ip, false);
1153
1154 /*
1155 * Make the stable writes flag match that of the device the inode
1156 * resides on when flipping the RT flag.
1157 */
1158 if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode))
1159 xfs_update_stable_writes(ip);
1160
1161 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1162 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1163 XFS_STATS_INC(mp, xs_ig_attrchg);
1164 return 0;
1165}
1166
1167static void
1168xfs_ioctl_setattr_prepare_dax(
1169 struct xfs_inode *ip,
1170 struct fileattr *fa)
1171{
1172 struct xfs_mount *mp = ip->i_mount;
1173 struct inode *inode = VFS_I(ip);
1174
1175 if (S_ISDIR(inode->i_mode))
1176 return;
1177
1178 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
1179 return;
1180
1181 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1182 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
1183 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1184 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
1185 d_mark_dontcache(inode);
1186}
1187
1188/*
1189 * Set up the transaction structure for the setattr operation, checking that we
1190 * have permission to do so. On success, return a clean transaction and the
1191 * inode locked exclusively ready for further operation specific checks. On
1192 * failure, return an error without modifying or locking the inode.
1193 */
1194static struct xfs_trans *
1195xfs_ioctl_setattr_get_trans(
1196 struct xfs_inode *ip,
1197 struct xfs_dquot *pdqp)
1198{
1199 struct xfs_mount *mp = ip->i_mount;
1200 struct xfs_trans *tp;
1201 int error = -EROFS;
1202
1203 if (xfs_is_readonly(mp))
1204 goto out_error;
1205 error = -EIO;
1206 if (xfs_is_shutdown(mp))
1207 goto out_error;
1208
1209 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
1210 has_capability_noaudit(current, CAP_FOWNER), &tp);
1211 if (error)
1212 goto out_error;
1213
1214 if (xfs_has_wsync(mp))
1215 xfs_trans_set_sync(tp);
1216
1217 return tp;
1218
1219out_error:
1220 return ERR_PTR(error);
1221}
1222
1223/*
1224 * Validate a proposed extent size hint. For regular files, the hint can only
1225 * be changed if no extents are allocated.
1226 */
1227static int
1228xfs_ioctl_setattr_check_extsize(
1229 struct xfs_inode *ip,
1230 struct fileattr *fa)
1231{
1232 struct xfs_mount *mp = ip->i_mount;
1233 xfs_failaddr_t failaddr;
1234 uint16_t new_diflags;
1235
1236 if (!fa->fsx_valid)
1237 return 0;
1238
1239 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1240 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
1241 return -EINVAL;
1242
1243 if (fa->fsx_extsize & mp->m_blockmask)
1244 return -EINVAL;
1245
1246 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1247
1248 /*
1249 * Inode verifiers do not check that the extent size hint is an integer
1250 * multiple of the rt extent size on a directory with both rtinherit
1251 * and extszinherit flags set. Don't let sysadmins misconfigure
1252 * directories.
1253 */
1254 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
1255 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
1256 unsigned int rtextsize_bytes;
1257
1258 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
1259 if (fa->fsx_extsize % rtextsize_bytes)
1260 return -EINVAL;
1261 }
1262
1263 failaddr = xfs_inode_validate_extsize(ip->i_mount,
1264 XFS_B_TO_FSB(mp, fa->fsx_extsize),
1265 VFS_I(ip)->i_mode, new_diflags);
1266 return failaddr != NULL ? -EINVAL : 0;
1267}
1268
1269static int
1270xfs_ioctl_setattr_check_cowextsize(
1271 struct xfs_inode *ip,
1272 struct fileattr *fa)
1273{
1274 struct xfs_mount *mp = ip->i_mount;
1275 xfs_failaddr_t failaddr;
1276 uint64_t new_diflags2;
1277 uint16_t new_diflags;
1278
1279 if (!fa->fsx_valid)
1280 return 0;
1281
1282 if (fa->fsx_cowextsize & mp->m_blockmask)
1283 return -EINVAL;
1284
1285 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1286 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1287
1288 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
1289 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
1290 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
1291 return failaddr != NULL ? -EINVAL : 0;
1292}
1293
1294static int
1295xfs_ioctl_setattr_check_projid(
1296 struct xfs_inode *ip,
1297 struct fileattr *fa)
1298{
1299 if (!fa->fsx_valid)
1300 return 0;
1301
1302 /* Disallow 32bit project ids if 32bit IDs are not enabled. */
1303 if (fa->fsx_projid > (uint16_t)-1 &&
1304 !xfs_has_projid32(ip->i_mount))
1305 return -EINVAL;
1306 return 0;
1307}
1308
1309int
1310xfs_fileattr_set(
1311 struct mnt_idmap *idmap,
1312 struct dentry *dentry,
1313 struct fileattr *fa)
1314{
1315 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1316 struct xfs_mount *mp = ip->i_mount;
1317 struct xfs_trans *tp;
1318 struct xfs_dquot *pdqp = NULL;
1319 struct xfs_dquot *olddquot = NULL;
1320 int error;
1321
1322 trace_xfs_ioctl_setattr(ip);
1323
1324 if (d_is_special(dentry))
1325 return -ENOTTY;
1326
1327 if (!fa->fsx_valid) {
1328 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1329 FS_NOATIME_FL | FS_NODUMP_FL |
1330 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1331 return -EOPNOTSUPP;
1332 }
1333
1334 error = xfs_ioctl_setattr_check_projid(ip, fa);
1335 if (error)
1336 return error;
1337
1338 /*
1339 * If disk quotas is on, we make sure that the dquots do exist on disk,
1340 * before we start any other transactions. Trying to do this later
1341 * is messy. We don't care to take a readlock to look at the ids
1342 * in inode here, because we can't hold it across the trans_reserve.
1343 * If the IDs do change before we take the ilock, we're covered
1344 * because the i_*dquot fields will get updated anyway.
1345 */
1346 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
1347 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1348 VFS_I(ip)->i_gid, fa->fsx_projid,
1349 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1350 if (error)
1351 return error;
1352 }
1353
1354 xfs_ioctl_setattr_prepare_dax(ip, fa);
1355
1356 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
1357 if (IS_ERR(tp)) {
1358 error = PTR_ERR(tp);
1359 goto error_free_dquots;
1360 }
1361
1362 error = xfs_ioctl_setattr_check_extsize(ip, fa);
1363 if (error)
1364 goto error_trans_cancel;
1365
1366 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1367 if (error)
1368 goto error_trans_cancel;
1369
1370 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1371 if (error)
1372 goto error_trans_cancel;
1373
1374 if (!fa->fsx_valid)
1375 goto skip_xattr;
1376 /*
1377 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1378 * overrides the following restrictions:
1379 *
1380 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1381 * successful return from chown()
1382 */
1383
1384 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1385 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID))
1386 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1387
1388 /* Change the ownerships and register project quota modifications */
1389 if (ip->i_projid != fa->fsx_projid) {
1390 if (XFS_IS_PQUOTA_ON(mp)) {
1391 olddquot = xfs_qm_vop_chown(tp, ip,
1392 &ip->i_pdquot, pdqp);
1393 }
1394 ip->i_projid = fa->fsx_projid;
1395 }
1396
1397 /*
1398 * Only set the extent size hint if we've already determined that the
1399 * extent size hint should be set on the inode. If no extent size flags
1400 * are set on the inode then unconditionally clear the extent size hint.
1401 */
1402 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1403 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1404 else
1405 ip->i_extsize = 0;
1406
1407 if (xfs_has_v3inodes(mp)) {
1408 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1409 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1410 else
1411 ip->i_cowextsize = 0;
1412 }
1413
1414skip_xattr:
1415 error = xfs_trans_commit(tp);
1416
1417 /*
1418 * Release any dquot(s) the inode had kept before chown.
1419 */
1420 xfs_qm_dqrele(olddquot);
1421 xfs_qm_dqrele(pdqp);
1422
1423 return error;
1424
1425error_trans_cancel:
1426 xfs_trans_cancel(tp);
1427error_free_dquots:
1428 xfs_qm_dqrele(pdqp);
1429 return error;
1430}
1431
1432static bool
1433xfs_getbmap_format(
1434 struct kgetbmap *p,
1435 struct getbmapx __user *u,
1436 size_t recsize)
1437{
1438 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1439 put_user(p->bmv_block, &u->bmv_block) ||
1440 put_user(p->bmv_length, &u->bmv_length) ||
1441 put_user(0, &u->bmv_count) ||
1442 put_user(0, &u->bmv_entries))
1443 return false;
1444 if (recsize < sizeof(struct getbmapx))
1445 return true;
1446 if (put_user(0, &u->bmv_iflags) ||
1447 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1448 put_user(0, &u->bmv_unused1) ||
1449 put_user(0, &u->bmv_unused2))
1450 return false;
1451 return true;
1452}
1453
1454STATIC int
1455xfs_ioc_getbmap(
1456 struct file *file,
1457 unsigned int cmd,
1458 void __user *arg)
1459{
1460 struct getbmapx bmx = { 0 };
1461 struct kgetbmap *buf;
1462 size_t recsize;
1463 int error, i;
1464
1465 switch (cmd) {
1466 case XFS_IOC_GETBMAPA:
1467 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1468 fallthrough;
1469 case XFS_IOC_GETBMAP:
1470 /* struct getbmap is a strict subset of struct getbmapx. */
1471 recsize = sizeof(struct getbmap);
1472 break;
1473 case XFS_IOC_GETBMAPX:
1474 recsize = sizeof(struct getbmapx);
1475 break;
1476 default:
1477 return -EINVAL;
1478 }
1479
1480 if (copy_from_user(&bmx, arg, recsize))
1481 return -EFAULT;
1482
1483 if (bmx.bmv_count < 2)
1484 return -EINVAL;
1485 if (bmx.bmv_count >= INT_MAX / recsize)
1486 return -ENOMEM;
1487
1488 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
1489 if (!buf)
1490 return -ENOMEM;
1491
1492 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1493 if (error)
1494 goto out_free_buf;
1495
1496 error = -EFAULT;
1497 if (copy_to_user(arg, &bmx, recsize))
1498 goto out_free_buf;
1499 arg += recsize;
1500
1501 for (i = 0; i < bmx.bmv_entries; i++) {
1502 if (!xfs_getbmap_format(buf + i, arg, recsize))
1503 goto out_free_buf;
1504 arg += recsize;
1505 }
1506
1507 error = 0;
1508out_free_buf:
1509 kvfree(buf);
1510 return error;
1511}
1512
1513STATIC int
1514xfs_ioc_getfsmap(
1515 struct xfs_inode *ip,
1516 struct fsmap_head __user *arg)
1517{
1518 struct xfs_fsmap_head xhead = {0};
1519 struct fsmap_head head;
1520 struct fsmap *recs;
1521 unsigned int count;
1522 __u32 last_flags = 0;
1523 bool done = false;
1524 int error;
1525
1526 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1527 return -EFAULT;
1528 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1529 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1530 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1531 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1532 sizeof(head.fmh_keys[1].fmr_reserved)))
1533 return -EINVAL;
1534
1535 /*
1536 * Use an internal memory buffer so that we don't have to copy fsmap
1537 * data to userspace while holding locks. Start by trying to allocate
1538 * up to 128k for the buffer, but fall back to a single page if needed.
1539 */
1540 count = min_t(unsigned int, head.fmh_count,
1541 131072 / sizeof(struct fsmap));
1542 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
1543 if (!recs) {
1544 count = min_t(unsigned int, head.fmh_count,
1545 PAGE_SIZE / sizeof(struct fsmap));
1546 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
1547 if (!recs)
1548 return -ENOMEM;
1549 }
1550
1551 xhead.fmh_iflags = head.fmh_iflags;
1552 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1553 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1554
1555 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1556 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1557
1558 head.fmh_entries = 0;
1559 do {
1560 struct fsmap __user *user_recs;
1561 struct fsmap *last_rec;
1562
1563 user_recs = &arg->fmh_recs[head.fmh_entries];
1564 xhead.fmh_entries = 0;
1565 xhead.fmh_count = min_t(unsigned int, count,
1566 head.fmh_count - head.fmh_entries);
1567
1568 /* Run query, record how many entries we got. */
1569 error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1570 switch (error) {
1571 case 0:
1572 /*
1573 * There are no more records in the result set. Copy
1574 * whatever we got to userspace and break out.
1575 */
1576 done = true;
1577 break;
1578 case -ECANCELED:
1579 /*
1580 * The internal memory buffer is full. Copy whatever
1581 * records we got to userspace and go again if we have
1582 * not yet filled the userspace buffer.
1583 */
1584 error = 0;
1585 break;
1586 default:
1587 goto out_free;
1588 }
1589 head.fmh_entries += xhead.fmh_entries;
1590 head.fmh_oflags = xhead.fmh_oflags;
1591
1592 /*
1593 * If the caller wanted a record count or there aren't any
1594 * new records to return, we're done.
1595 */
1596 if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1597 break;
1598
1599 /* Copy all the records we got out to userspace. */
1600 if (copy_to_user(user_recs, recs,
1601 xhead.fmh_entries * sizeof(struct fsmap))) {
1602 error = -EFAULT;
1603 goto out_free;
1604 }
1605
1606 /* Remember the last record flags we copied to userspace. */
1607 last_rec = &recs[xhead.fmh_entries - 1];
1608 last_flags = last_rec->fmr_flags;
1609
1610 /* Set up the low key for the next iteration. */
1611 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1612 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1613 } while (!done && head.fmh_entries < head.fmh_count);
1614
1615 /*
1616 * If there are no more records in the query result set and we're not
1617 * in counting mode, mark the last record returned with the LAST flag.
1618 */
1619 if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1620 struct fsmap __user *user_rec;
1621
1622 last_flags |= FMR_OF_LAST;
1623 user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1624
1625 if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1626 sizeof(last_flags))) {
1627 error = -EFAULT;
1628 goto out_free;
1629 }
1630 }
1631
1632 /* copy back header */
1633 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1634 error = -EFAULT;
1635 goto out_free;
1636 }
1637
1638out_free:
1639 kvfree(recs);
1640 return error;
1641}
1642
1643STATIC int
1644xfs_ioc_scrub_metadata(
1645 struct file *file,
1646 void __user *arg)
1647{
1648 struct xfs_scrub_metadata scrub;
1649 int error;
1650
1651 if (!capable(CAP_SYS_ADMIN))
1652 return -EPERM;
1653
1654 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1655 return -EFAULT;
1656
1657 error = xfs_scrub_metadata(file, &scrub);
1658 if (error)
1659 return error;
1660
1661 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1662 return -EFAULT;
1663
1664 return 0;
1665}
1666
1667int
1668xfs_ioc_swapext(
1669 xfs_swapext_t *sxp)
1670{
1671 xfs_inode_t *ip, *tip;
1672 struct fd f, tmp;
1673 int error = 0;
1674
1675 /* Pull information for the target fd */
1676 f = fdget((int)sxp->sx_fdtarget);
1677 if (!f.file) {
1678 error = -EINVAL;
1679 goto out;
1680 }
1681
1682 if (!(f.file->f_mode & FMODE_WRITE) ||
1683 !(f.file->f_mode & FMODE_READ) ||
1684 (f.file->f_flags & O_APPEND)) {
1685 error = -EBADF;
1686 goto out_put_file;
1687 }
1688
1689 tmp = fdget((int)sxp->sx_fdtmp);
1690 if (!tmp.file) {
1691 error = -EINVAL;
1692 goto out_put_file;
1693 }
1694
1695 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1696 !(tmp.file->f_mode & FMODE_READ) ||
1697 (tmp.file->f_flags & O_APPEND)) {
1698 error = -EBADF;
1699 goto out_put_tmp_file;
1700 }
1701
1702 if (IS_SWAPFILE(file_inode(f.file)) ||
1703 IS_SWAPFILE(file_inode(tmp.file))) {
1704 error = -EINVAL;
1705 goto out_put_tmp_file;
1706 }
1707
1708 /*
1709 * We need to ensure that the fds passed in point to XFS inodes
1710 * before we cast and access them as XFS structures as we have no
1711 * control over what the user passes us here.
1712 */
1713 if (f.file->f_op != &xfs_file_operations ||
1714 tmp.file->f_op != &xfs_file_operations) {
1715 error = -EINVAL;
1716 goto out_put_tmp_file;
1717 }
1718
1719 ip = XFS_I(file_inode(f.file));
1720 tip = XFS_I(file_inode(tmp.file));
1721
1722 if (ip->i_mount != tip->i_mount) {
1723 error = -EINVAL;
1724 goto out_put_tmp_file;
1725 }
1726
1727 if (ip->i_ino == tip->i_ino) {
1728 error = -EINVAL;
1729 goto out_put_tmp_file;
1730 }
1731
1732 if (xfs_is_shutdown(ip->i_mount)) {
1733 error = -EIO;
1734 goto out_put_tmp_file;
1735 }
1736
1737 error = xfs_swap_extents(ip, tip, sxp);
1738
1739 out_put_tmp_file:
1740 fdput(tmp);
1741 out_put_file:
1742 fdput(f);
1743 out:
1744 return error;
1745}
1746
1747static int
1748xfs_ioc_getlabel(
1749 struct xfs_mount *mp,
1750 char __user *user_label)
1751{
1752 struct xfs_sb *sbp = &mp->m_sb;
1753 char label[XFSLABEL_MAX + 1];
1754
1755 /* Paranoia */
1756 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1757
1758 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1759 memset(label, 0, sizeof(label));
1760 spin_lock(&mp->m_sb_lock);
1761 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1762 spin_unlock(&mp->m_sb_lock);
1763
1764 if (copy_to_user(user_label, label, sizeof(label)))
1765 return -EFAULT;
1766 return 0;
1767}
1768
1769static int
1770xfs_ioc_setlabel(
1771 struct file *filp,
1772 struct xfs_mount *mp,
1773 char __user *newlabel)
1774{
1775 struct xfs_sb *sbp = &mp->m_sb;
1776 char label[XFSLABEL_MAX + 1];
1777 size_t len;
1778 int error;
1779
1780 if (!capable(CAP_SYS_ADMIN))
1781 return -EPERM;
1782 /*
1783 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1784 * smaller, at 12 bytes. We copy one more to be sure we find the
1785 * (required) NULL character to test the incoming label length.
1786 * NB: The on disk label doesn't need to be null terminated.
1787 */
1788 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1789 return -EFAULT;
1790 len = strnlen(label, XFSLABEL_MAX + 1);
1791 if (len > sizeof(sbp->sb_fname))
1792 return -EINVAL;
1793
1794 error = mnt_want_write_file(filp);
1795 if (error)
1796 return error;
1797
1798 spin_lock(&mp->m_sb_lock);
1799 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1800 memcpy(sbp->sb_fname, label, len);
1801 spin_unlock(&mp->m_sb_lock);
1802
1803 /*
1804 * Now we do several things to satisfy userspace.
1805 * In addition to normal logging of the primary superblock, we also
1806 * immediately write these changes to sector zero for the primary, then
1807 * update all backup supers (as xfs_db does for a label change), then
1808 * invalidate the block device page cache. This is so that any prior
1809 * buffered reads from userspace (i.e. from blkid) are invalidated,
1810 * and userspace will see the newly-written label.
1811 */
1812 error = xfs_sync_sb_buf(mp);
1813 if (error)
1814 goto out;
1815 /*
1816 * growfs also updates backup supers so lock against that.
1817 */
1818 mutex_lock(&mp->m_growlock);
1819 error = xfs_update_secondary_sbs(mp);
1820 mutex_unlock(&mp->m_growlock);
1821
1822 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1823
1824out:
1825 mnt_drop_write_file(filp);
1826 return error;
1827}
1828
1829static inline int
1830xfs_fs_eofblocks_from_user(
1831 struct xfs_fs_eofblocks *src,
1832 struct xfs_icwalk *dst)
1833{
1834 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1835 return -EINVAL;
1836
1837 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1838 return -EINVAL;
1839
1840 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1841 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1842 return -EINVAL;
1843
1844 dst->icw_flags = 0;
1845 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1846 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1847 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1848 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1849 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1850 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1851 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1852 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1853 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1854 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1855
1856 dst->icw_prid = src->eof_prid;
1857 dst->icw_min_file_size = src->eof_min_file_size;
1858
1859 dst->icw_uid = INVALID_UID;
1860 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1861 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1862 if (!uid_valid(dst->icw_uid))
1863 return -EINVAL;
1864 }
1865
1866 dst->icw_gid = INVALID_GID;
1867 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1868 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1869 if (!gid_valid(dst->icw_gid))
1870 return -EINVAL;
1871 }
1872 return 0;
1873}
1874
1875static int
1876xfs_ioctl_getset_resblocks(
1877 struct file *filp,
1878 unsigned int cmd,
1879 void __user *arg)
1880{
1881 struct xfs_mount *mp = XFS_I(file_inode(filp))->i_mount;
1882 struct xfs_fsop_resblks fsop = { };
1883 int error;
1884
1885 if (!capable(CAP_SYS_ADMIN))
1886 return -EPERM;
1887
1888 if (cmd == XFS_IOC_SET_RESBLKS) {
1889 if (xfs_is_readonly(mp))
1890 return -EROFS;
1891
1892 if (copy_from_user(&fsop, arg, sizeof(fsop)))
1893 return -EFAULT;
1894
1895 error = mnt_want_write_file(filp);
1896 if (error)
1897 return error;
1898 error = xfs_reserve_blocks(mp, fsop.resblks);
1899 mnt_drop_write_file(filp);
1900 if (error)
1901 return error;
1902 }
1903
1904 spin_lock(&mp->m_sb_lock);
1905 fsop.resblks = mp->m_resblks;
1906 fsop.resblks_avail = mp->m_resblks_avail;
1907 spin_unlock(&mp->m_sb_lock);
1908
1909 if (copy_to_user(arg, &fsop, sizeof(fsop)))
1910 return -EFAULT;
1911 return 0;
1912}
1913
1914static int
1915xfs_ioctl_fs_counts(
1916 struct xfs_mount *mp,
1917 struct xfs_fsop_counts __user *uarg)
1918{
1919 struct xfs_fsop_counts out = {
1920 .allocino = percpu_counter_read_positive(&mp->m_icount),
1921 .freeino = percpu_counter_read_positive(&mp->m_ifree),
1922 .freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
1923 xfs_fdblocks_unavailable(mp),
1924 .freertx = percpu_counter_read_positive(&mp->m_frextents),
1925 };
1926
1927 if (copy_to_user(uarg, &out, sizeof(out)))
1928 return -EFAULT;
1929 return 0;
1930}
1931
1932/*
1933 * These long-unused ioctls were removed from the official ioctl API in 5.17,
1934 * but retain these definitions so that we can log warnings about them.
1935 */
1936#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
1937#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
1938#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
1939#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
1940
1941/*
1942 * Note: some of the ioctl's return positive numbers as a
1943 * byte count indicating success, such as readlink_by_handle.
1944 * So we don't "sign flip" like most other routines. This means
1945 * true errors need to be returned as a negative value.
1946 */
1947long
1948xfs_file_ioctl(
1949 struct file *filp,
1950 unsigned int cmd,
1951 unsigned long p)
1952{
1953 struct inode *inode = file_inode(filp);
1954 struct xfs_inode *ip = XFS_I(inode);
1955 struct xfs_mount *mp = ip->i_mount;
1956 void __user *arg = (void __user *)p;
1957 int error;
1958
1959 trace_xfs_file_ioctl(ip);
1960
1961 switch (cmd) {
1962 case FITRIM:
1963 return xfs_ioc_trim(mp, arg);
1964 case FS_IOC_GETFSLABEL:
1965 return xfs_ioc_getlabel(mp, arg);
1966 case FS_IOC_SETFSLABEL:
1967 return xfs_ioc_setlabel(filp, mp, arg);
1968 case XFS_IOC_ALLOCSP:
1969 case XFS_IOC_FREESP:
1970 case XFS_IOC_ALLOCSP64:
1971 case XFS_IOC_FREESP64:
1972 xfs_warn_once(mp,
1973 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
1974 current->comm);
1975 return -ENOTTY;
1976 case XFS_IOC_DIOINFO: {
1977 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1978 struct dioattr da;
1979
1980 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1981 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1982
1983 if (copy_to_user(arg, &da, sizeof(da)))
1984 return -EFAULT;
1985 return 0;
1986 }
1987
1988 case XFS_IOC_FSBULKSTAT_SINGLE:
1989 case XFS_IOC_FSBULKSTAT:
1990 case XFS_IOC_FSINUMBERS:
1991 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1992
1993 case XFS_IOC_BULKSTAT:
1994 return xfs_ioc_bulkstat(filp, cmd, arg);
1995 case XFS_IOC_INUMBERS:
1996 return xfs_ioc_inumbers(mp, cmd, arg);
1997
1998 case XFS_IOC_FSGEOMETRY_V1:
1999 return xfs_ioc_fsgeometry(mp, arg, 3);
2000 case XFS_IOC_FSGEOMETRY_V4:
2001 return xfs_ioc_fsgeometry(mp, arg, 4);
2002 case XFS_IOC_FSGEOMETRY:
2003 return xfs_ioc_fsgeometry(mp, arg, 5);
2004
2005 case XFS_IOC_AG_GEOMETRY:
2006 return xfs_ioc_ag_geometry(mp, arg);
2007
2008 case XFS_IOC_GETVERSION:
2009 return put_user(inode->i_generation, (int __user *)arg);
2010
2011 case XFS_IOC_FSGETXATTRA:
2012 return xfs_ioc_fsgetxattra(ip, arg);
2013
2014 case XFS_IOC_GETBMAP:
2015 case XFS_IOC_GETBMAPA:
2016 case XFS_IOC_GETBMAPX:
2017 return xfs_ioc_getbmap(filp, cmd, arg);
2018
2019 case FS_IOC_GETFSMAP:
2020 return xfs_ioc_getfsmap(ip, arg);
2021
2022 case XFS_IOC_SCRUB_METADATA:
2023 return xfs_ioc_scrub_metadata(filp, arg);
2024
2025 case XFS_IOC_FD_TO_HANDLE:
2026 case XFS_IOC_PATH_TO_HANDLE:
2027 case XFS_IOC_PATH_TO_FSHANDLE: {
2028 xfs_fsop_handlereq_t hreq;
2029
2030 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2031 return -EFAULT;
2032 return xfs_find_handle(cmd, &hreq);
2033 }
2034 case XFS_IOC_OPEN_BY_HANDLE: {
2035 xfs_fsop_handlereq_t hreq;
2036
2037 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2038 return -EFAULT;
2039 return xfs_open_by_handle(filp, &hreq);
2040 }
2041
2042 case XFS_IOC_READLINK_BY_HANDLE: {
2043 xfs_fsop_handlereq_t hreq;
2044
2045 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2046 return -EFAULT;
2047 return xfs_readlink_by_handle(filp, &hreq);
2048 }
2049 case XFS_IOC_ATTRLIST_BY_HANDLE:
2050 return xfs_attrlist_by_handle(filp, arg);
2051
2052 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2053 return xfs_attrmulti_by_handle(filp, arg);
2054
2055 case XFS_IOC_SWAPEXT: {
2056 struct xfs_swapext sxp;
2057
2058 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2059 return -EFAULT;
2060 error = mnt_want_write_file(filp);
2061 if (error)
2062 return error;
2063 error = xfs_ioc_swapext(&sxp);
2064 mnt_drop_write_file(filp);
2065 return error;
2066 }
2067
2068 case XFS_IOC_FSCOUNTS:
2069 return xfs_ioctl_fs_counts(mp, arg);
2070
2071 case XFS_IOC_SET_RESBLKS:
2072 case XFS_IOC_GET_RESBLKS:
2073 return xfs_ioctl_getset_resblocks(filp, cmd, arg);
2074
2075 case XFS_IOC_FSGROWFSDATA: {
2076 struct xfs_growfs_data in;
2077
2078 if (copy_from_user(&in, arg, sizeof(in)))
2079 return -EFAULT;
2080
2081 error = mnt_want_write_file(filp);
2082 if (error)
2083 return error;
2084 error = xfs_growfs_data(mp, &in);
2085 mnt_drop_write_file(filp);
2086 return error;
2087 }
2088
2089 case XFS_IOC_FSGROWFSLOG: {
2090 struct xfs_growfs_log in;
2091
2092 if (copy_from_user(&in, arg, sizeof(in)))
2093 return -EFAULT;
2094
2095 error = mnt_want_write_file(filp);
2096 if (error)
2097 return error;
2098 error = xfs_growfs_log(mp, &in);
2099 mnt_drop_write_file(filp);
2100 return error;
2101 }
2102
2103 case XFS_IOC_FSGROWFSRT: {
2104 xfs_growfs_rt_t in;
2105
2106 if (copy_from_user(&in, arg, sizeof(in)))
2107 return -EFAULT;
2108
2109 error = mnt_want_write_file(filp);
2110 if (error)
2111 return error;
2112 error = xfs_growfs_rt(mp, &in);
2113 mnt_drop_write_file(filp);
2114 return error;
2115 }
2116
2117 case XFS_IOC_GOINGDOWN: {
2118 uint32_t in;
2119
2120 if (!capable(CAP_SYS_ADMIN))
2121 return -EPERM;
2122
2123 if (get_user(in, (uint32_t __user *)arg))
2124 return -EFAULT;
2125
2126 return xfs_fs_goingdown(mp, in);
2127 }
2128
2129 case XFS_IOC_ERROR_INJECTION: {
2130 xfs_error_injection_t in;
2131
2132 if (!capable(CAP_SYS_ADMIN))
2133 return -EPERM;
2134
2135 if (copy_from_user(&in, arg, sizeof(in)))
2136 return -EFAULT;
2137
2138 return xfs_errortag_add(mp, in.errtag);
2139 }
2140
2141 case XFS_IOC_ERROR_CLEARALL:
2142 if (!capable(CAP_SYS_ADMIN))
2143 return -EPERM;
2144
2145 return xfs_errortag_clearall(mp);
2146
2147 case XFS_IOC_FREE_EOFBLOCKS: {
2148 struct xfs_fs_eofblocks eofb;
2149 struct xfs_icwalk icw;
2150
2151 if (!capable(CAP_SYS_ADMIN))
2152 return -EPERM;
2153
2154 if (xfs_is_readonly(mp))
2155 return -EROFS;
2156
2157 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2158 return -EFAULT;
2159
2160 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
2161 if (error)
2162 return error;
2163
2164 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
2165
2166 sb_start_write(mp->m_super);
2167 error = xfs_blockgc_free_space(mp, &icw);
2168 sb_end_write(mp->m_super);
2169 return error;
2170 }
2171
2172 default:
2173 return -ENOTTY;
2174 }
2175}