projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'media/v4.8-6' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[deliverable/linux.git] / fs / xfs / xfs_ioctl.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_inode.h"
26 #include "xfs_ioctl.h"
27 #include "xfs_alloc.h"
28 #include "xfs_rtalloc.h"
29 #include "xfs_itable.h"
30 #include "xfs_error.h"
31 #include "xfs_attr.h"
32 #include "xfs_bmap.h"
33 #include "xfs_bmap_util.h"
34 #include "xfs_fsops.h"
35 #include "xfs_discard.h"
36 #include "xfs_quota.h"
37 #include "xfs_export.h"
38 #include "xfs_trace.h"
39 #include "xfs_icache.h"
40 #include "xfs_symlink.h"
41 #include "xfs_trans.h"
42 #include "xfs_pnfs.h"
43 #include "xfs_acl.h"
44
45 #include <linux/capability.h>
46 #include <linux/dcache.h>
47 #include <linux/mount.h>
48 #include <linux/namei.h>
49 #include <linux/pagemap.h>
50 #include <linux/slab.h>
51 #include <linux/exportfs.h>
52
53 /*
54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
55 * a file or fs handle.
56 *
57 * XFS_IOC_PATH_TO_FSHANDLE
58 * returns fs handle for a mount point or path within that mount point
59 * XFS_IOC_FD_TO_HANDLE
60 * returns full handle for a FD opened in user space
61 * XFS_IOC_PATH_TO_HANDLE
62 * returns full handle for a path
63 */
64 int
65 xfs_find_handle(
66 unsigned int cmd,
67 xfs_fsop_handlereq_t *hreq)
68 {
69 int hsize;
70 xfs_handle_t handle;
71 struct inode *inode;
72 struct fd f = {NULL};
73 struct path path;
74 int error;
75 struct xfs_inode *ip;
76
77 if (cmd == XFS_IOC_FD_TO_HANDLE) {
78 f = fdget(hreq->fd);
79 if (!f.file)
80 return -EBADF;
81 inode = file_inode(f.file);
82 } else {
83 error = user_lpath((const char __user *)hreq->path, &path);
84 if (error)
85 return error;
86 inode = d_inode(path.dentry);
87 }
88 ip = XFS_I(inode);
89
90 /*
91 * We can only generate handles for inodes residing on a XFS filesystem,
92 * and only for regular files, directories or symbolic links.
93 */
94 error = -EINVAL;
95 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
96 goto out_put;
97
98 error = -EBADF;
99 if (!S_ISREG(inode->i_mode) &&
100 !S_ISDIR(inode->i_mode) &&
101 !S_ISLNK(inode->i_mode))
102 goto out_put;
103
104
105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
106
107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
108 /*
109 * This handle only contains an fsid, zero the rest.
110 */
111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
112 hsize = sizeof(xfs_fsid_t);
113 } else {
114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
115 sizeof(handle.ha_fid.fid_len);
116 handle.ha_fid.fid_pad = 0;
117 handle.ha_fid.fid_gen = inode->i_generation;
118 handle.ha_fid.fid_ino = ip->i_ino;
119
120 hsize = XFS_HSIZE(handle);
121 }
122
123 error = -EFAULT;
124 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
126 goto out_put;
127
128 error = 0;
129
130 out_put:
131 if (cmd == XFS_IOC_FD_TO_HANDLE)
132 fdput(f);
133 else
134 path_put(&path);
135 return error;
136 }
137
138 /*
139 * No need to do permission checks on the various pathname components
140 * as the handle operations are privileged.
141 */
142 STATIC int
143 xfs_handle_acceptable(
144 void *context,
145 struct dentry *dentry)
146 {
147 return 1;
148 }
149
150 /*
151 * Convert userspace handle data into a dentry.
152 */
153 struct dentry *
154 xfs_handle_to_dentry(
155 struct file *parfilp,
156 void __user *uhandle,
157 u32 hlen)
158 {
159 xfs_handle_t handle;
160 struct xfs_fid64 fid;
161
162 /*
163 * Only allow handle opens under a directory.
164 */
165 if (!S_ISDIR(file_inode(parfilp)->i_mode))
166 return ERR_PTR(-ENOTDIR);
167
168 if (hlen != sizeof(xfs_handle_t))
169 return ERR_PTR(-EINVAL);
170 if (copy_from_user(&handle, uhandle, hlen))
171 return ERR_PTR(-EFAULT);
172 if (handle.ha_fid.fid_len !=
173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
174 return ERR_PTR(-EINVAL);
175
176 memset(&fid, 0, sizeof(struct fid));
177 fid.ino = handle.ha_fid.fid_ino;
178 fid.gen = handle.ha_fid.fid_gen;
179
180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
182 xfs_handle_acceptable, NULL);
183 }
184
185 STATIC struct dentry *
186 xfs_handlereq_to_dentry(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
189 {
190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
191 }
192
193 int
194 xfs_open_by_handle(
195 struct file *parfilp,
196 xfs_fsop_handlereq_t *hreq)
197 {
198 const struct cred *cred = current_cred();
199 int error;
200 int fd;
201 int permflag;
202 struct file *filp;
203 struct inode *inode;
204 struct dentry *dentry;
205 fmode_t fmode;
206 struct path path;
207
208 if (!capable(CAP_SYS_ADMIN))
209 return -EPERM;
210
211 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
212 if (IS_ERR(dentry))
213 return PTR_ERR(dentry);
214 inode = d_inode(dentry);
215
216 /* Restrict xfs_open_by_handle to directories & regular files. */
217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
218 error = -EPERM;
219 goto out_dput;
220 }
221
222 #if BITS_PER_LONG != 32
223 hreq->oflags |= O_LARGEFILE;
224 #endif
225
226 permflag = hreq->oflags;
227 fmode = OPEN_FMODE(permflag);
228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
230 error = -EPERM;
231 goto out_dput;
232 }
233
234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
235 error = -EACCES;
236 goto out_dput;
237 }
238
239 /* Can't write directories. */
240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
241 error = -EISDIR;
242 goto out_dput;
243 }
244
245 fd = get_unused_fd_flags(0);
246 if (fd < 0) {
247 error = fd;
248 goto out_dput;
249 }
250
251 path.mnt = parfilp->f_path.mnt;
252 path.dentry = dentry;
253 filp = dentry_open(&path, hreq->oflags, cred);
254 dput(dentry);
255 if (IS_ERR(filp)) {
256 put_unused_fd(fd);
257 return PTR_ERR(filp);
258 }
259
260 if (S_ISREG(inode->i_mode)) {
261 filp->f_flags |= O_NOATIME;
262 filp->f_mode |= FMODE_NOCMTIME;
263 }
264
265 fd_install(fd, filp);
266 return fd;
267
268 out_dput:
269 dput(dentry);
270 return error;
271 }
272
273 int
274 xfs_readlink_by_handle(
275 struct file *parfilp,
276 xfs_fsop_handlereq_t *hreq)
277 {
278 struct dentry *dentry;
279 __u32 olen;
280 int error;
281
282 if (!capable(CAP_SYS_ADMIN))
283 return -EPERM;
284
285 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
286 if (IS_ERR(dentry))
287 return PTR_ERR(dentry);
288
289 /* Restrict this handle operation to symlinks only. */
290 if (!d_inode(dentry)->i_op->readlink) {
291 error = -EINVAL;
292 goto out_dput;
293 }
294
295 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
296 error = -EFAULT;
297 goto out_dput;
298 }
299
300 error = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen);
301
302 out_dput:
303 dput(dentry);
304 return error;
305 }
306
307 int
308 xfs_set_dmattrs(
309 xfs_inode_t *ip,
310 u_int evmask,
311 u_int16_t state)
312 {
313 xfs_mount_t *mp = ip->i_mount;
314 xfs_trans_t *tp;
315 int error;
316
317 if (!capable(CAP_SYS_ADMIN))
318 return -EPERM;
319
320 if (XFS_FORCED_SHUTDOWN(mp))
321 return -EIO;
322
323 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
324 if (error)
325 return error;
326
327 xfs_ilock(ip, XFS_ILOCK_EXCL);
328 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
329
330 ip->i_d.di_dmevmask = evmask;
331 ip->i_d.di_dmstate = state;
332
333 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
334 error = xfs_trans_commit(tp);
335
336 return error;
337 }
338
339 STATIC int
340 xfs_fssetdm_by_handle(
341 struct file *parfilp,
342 void __user *arg)
343 {
344 int error;
345 struct fsdmidata fsd;
346 xfs_fsop_setdm_handlereq_t dmhreq;
347 struct dentry *dentry;
348
349 if (!capable(CAP_MKNOD))
350 return -EPERM;
351 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
352 return -EFAULT;
353
354 error = mnt_want_write_file(parfilp);
355 if (error)
356 return error;
357
358 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
359 if (IS_ERR(dentry)) {
360 mnt_drop_write_file(parfilp);
361 return PTR_ERR(dentry);
362 }
363
364 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
365 error = -EPERM;
366 goto out;
367 }
368
369 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
370 error = -EFAULT;
371 goto out;
372 }
373
374 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
375 fsd.fsd_dmstate);
376
377 out:
378 mnt_drop_write_file(parfilp);
379 dput(dentry);
380 return error;
381 }
382
383 STATIC int
384 xfs_attrlist_by_handle(
385 struct file *parfilp,
386 void __user *arg)
387 {
388 int error = -ENOMEM;
389 attrlist_cursor_kern_t *cursor;
390 xfs_fsop_attrlist_handlereq_t al_hreq;
391 struct dentry *dentry;
392 char *kbuf;
393
394 if (!capable(CAP_SYS_ADMIN))
395 return -EPERM;
396 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
397 return -EFAULT;
398 if (al_hreq.buflen < sizeof(struct attrlist) ||
399 al_hreq.buflen > XFS_XATTR_LIST_MAX)
400 return -EINVAL;
401
402 /*
403 * Reject flags, only allow namespaces.
404 */
405 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
406 return -EINVAL;
407
408 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
409 if (IS_ERR(dentry))
410 return PTR_ERR(dentry);
411
412 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
413 if (!kbuf)
414 goto out_dput;
415
416 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
417 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
418 al_hreq.flags, cursor);
419 if (error)
420 goto out_kfree;
421
422 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
423 error = -EFAULT;
424
425 out_kfree:
426 kmem_free(kbuf);
427 out_dput:
428 dput(dentry);
429 return error;
430 }
431
432 int
433 xfs_attrmulti_attr_get(
434 struct inode *inode,
435 unsigned char *name,
436 unsigned char __user *ubuf,
437 __uint32_t *len,
438 __uint32_t flags)
439 {
440 unsigned char *kbuf;
441 int error = -EFAULT;
442
443 if (*len > XFS_XATTR_SIZE_MAX)
444 return -EINVAL;
445 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
446 if (!kbuf)
447 return -ENOMEM;
448
449 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
450 if (error)
451 goto out_kfree;
452
453 if (copy_to_user(ubuf, kbuf, *len))
454 error = -EFAULT;
455
456 out_kfree:
457 kmem_free(kbuf);
458 return error;
459 }
460
461 int
462 xfs_attrmulti_attr_set(
463 struct inode *inode,
464 unsigned char *name,
465 const unsigned char __user *ubuf,
466 __uint32_t len,
467 __uint32_t flags)
468 {
469 unsigned char *kbuf;
470 int error;
471
472 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
473 return -EPERM;
474 if (len > XFS_XATTR_SIZE_MAX)
475 return -EINVAL;
476
477 kbuf = memdup_user(ubuf, len);
478 if (IS_ERR(kbuf))
479 return PTR_ERR(kbuf);
480
481 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
482 if (!error)
483 xfs_forget_acl(inode, name, flags);
484 kfree(kbuf);
485 return error;
486 }
487
488 int
489 xfs_attrmulti_attr_remove(
490 struct inode *inode,
491 unsigned char *name,
492 __uint32_t flags)
493 {
494 int error;
495
496 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
497 return -EPERM;
498 error = xfs_attr_remove(XFS_I(inode), name, flags);
499 if (!error)
500 xfs_forget_acl(inode, name, flags);
501 return error;
502 }
503
504 STATIC int
505 xfs_attrmulti_by_handle(
506 struct file *parfilp,
507 void __user *arg)
508 {
509 int error;
510 xfs_attr_multiop_t *ops;
511 xfs_fsop_attrmulti_handlereq_t am_hreq;
512 struct dentry *dentry;
513 unsigned int i, size;
514 unsigned char *attr_name;
515
516 if (!capable(CAP_SYS_ADMIN))
517 return -EPERM;
518 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
519 return -EFAULT;
520
521 /* overflow check */
522 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
523 return -E2BIG;
524
525 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
526 if (IS_ERR(dentry))
527 return PTR_ERR(dentry);
528
529 error = -E2BIG;
530 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
531 if (!size || size > 16 * PAGE_SIZE)
532 goto out_dput;
533
534 ops = memdup_user(am_hreq.ops, size);
535 if (IS_ERR(ops)) {
536 error = PTR_ERR(ops);
537 goto out_dput;
538 }
539
540 error = -ENOMEM;
541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
542 if (!attr_name)
543 goto out_kfree_ops;
544
545 error = 0;
546 for (i = 0; i < am_hreq.opcount; i++) {
547 ops[i].am_error = strncpy_from_user((char *)attr_name,
548 ops[i].am_attrname, MAXNAMELEN);
549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
550 error = -ERANGE;
551 if (ops[i].am_error < 0)
552 break;
553
554 switch (ops[i].am_opcode) {
555 case ATTR_OP_GET:
556 ops[i].am_error = xfs_attrmulti_attr_get(
557 d_inode(dentry), attr_name,
558 ops[i].am_attrvalue, &ops[i].am_length,
559 ops[i].am_flags);
560 break;
561 case ATTR_OP_SET:
562 ops[i].am_error = mnt_want_write_file(parfilp);
563 if (ops[i].am_error)
564 break;
565 ops[i].am_error = xfs_attrmulti_attr_set(
566 d_inode(dentry), attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
568 ops[i].am_flags);
569 mnt_drop_write_file(parfilp);
570 break;
571 case ATTR_OP_REMOVE:
572 ops[i].am_error = mnt_want_write_file(parfilp);
573 if (ops[i].am_error)
574 break;
575 ops[i].am_error = xfs_attrmulti_attr_remove(
576 d_inode(dentry), attr_name,
577 ops[i].am_flags);
578 mnt_drop_write_file(parfilp);
579 break;
580 default:
581 ops[i].am_error = -EINVAL;
582 }
583 }
584
585 if (copy_to_user(am_hreq.ops, ops, size))
586 error = -EFAULT;
587
588 kfree(attr_name);
589 out_kfree_ops:
590 kfree(ops);
591 out_dput:
592 dput(dentry);
593 return error;
594 }
595
596 int
597 xfs_ioc_space(
598 struct file *filp,
599 unsigned int cmd,
600 xfs_flock64_t *bf)
601 {
602 struct inode *inode = file_inode(filp);
603 struct xfs_inode *ip = XFS_I(inode);
604 struct iattr iattr;
605 enum xfs_prealloc_flags flags = 0;
606 uint iolock = XFS_IOLOCK_EXCL;
607 int error;
608
609 /*
610 * Only allow the sys admin to reserve space unless
611 * unwritten extents are enabled.
612 */
613 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
614 !capable(CAP_SYS_ADMIN))
615 return -EPERM;
616
617 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
618 return -EPERM;
619
620 if (!(filp->f_mode & FMODE_WRITE))
621 return -EBADF;
622
623 if (!S_ISREG(inode->i_mode))
624 return -EINVAL;
625
626 if (filp->f_flags & O_DSYNC)
627 flags |= XFS_PREALLOC_SYNC;
628 if (filp->f_mode & FMODE_NOCMTIME)
629 flags |= XFS_PREALLOC_INVISIBLE;
630
631 error = mnt_want_write_file(filp);
632 if (error)
633 return error;
634
635 xfs_ilock(ip, iolock);
636 error = xfs_break_layouts(inode, &iolock, false);
637 if (error)
638 goto out_unlock;
639
640 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
641 iolock |= XFS_MMAPLOCK_EXCL;
642
643 switch (bf->l_whence) {
644 case 0: /*SEEK_SET*/
645 break;
646 case 1: /*SEEK_CUR*/
647 bf->l_start += filp->f_pos;
648 break;
649 case 2: /*SEEK_END*/
650 bf->l_start += XFS_ISIZE(ip);
651 break;
652 default:
653 error = -EINVAL;
654 goto out_unlock;
655 }
656
657 /*
658 * length of <= 0 for resv/unresv/zero is invalid. length for
659 * alloc/free is ignored completely and we have no idea what userspace
660 * might have set it to, so set it to zero to allow range
661 * checks to pass.
662 */
663 switch (cmd) {
664 case XFS_IOC_ZERO_RANGE:
665 case XFS_IOC_RESVSP:
666 case XFS_IOC_RESVSP64:
667 case XFS_IOC_UNRESVSP:
668 case XFS_IOC_UNRESVSP64:
669 if (bf->l_len <= 0) {
670 error = -EINVAL;
671 goto out_unlock;
672 }
673 break;
674 default:
675 bf->l_len = 0;
676 break;
677 }
678
679 if (bf->l_start < 0 ||
680 bf->l_start > inode->i_sb->s_maxbytes ||
681 bf->l_start + bf->l_len < 0 ||
682 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
683 error = -EINVAL;
684 goto out_unlock;
685 }
686
687 switch (cmd) {
688 case XFS_IOC_ZERO_RANGE:
689 flags |= XFS_PREALLOC_SET;
690 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
691 break;
692 case XFS_IOC_RESVSP:
693 case XFS_IOC_RESVSP64:
694 flags |= XFS_PREALLOC_SET;
695 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
696 XFS_BMAPI_PREALLOC);
697 break;
698 case XFS_IOC_UNRESVSP:
699 case XFS_IOC_UNRESVSP64:
700 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
701 break;
702 case XFS_IOC_ALLOCSP:
703 case XFS_IOC_ALLOCSP64:
704 case XFS_IOC_FREESP:
705 case XFS_IOC_FREESP64:
706 flags |= XFS_PREALLOC_CLEAR;
707 if (bf->l_start > XFS_ISIZE(ip)) {
708 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
709 bf->l_start - XFS_ISIZE(ip), 0);
710 if (error)
711 goto out_unlock;
712 }
713
714 iattr.ia_valid = ATTR_SIZE;
715 iattr.ia_size = bf->l_start;
716
717 error = xfs_setattr_size(ip, &iattr);
718 break;
719 default:
720 ASSERT(0);
721 error = -EINVAL;
722 }
723
724 if (error)
725 goto out_unlock;
726
727 error = xfs_update_prealloc_flags(ip, flags);
728
729 out_unlock:
730 xfs_iunlock(ip, iolock);
731 mnt_drop_write_file(filp);
732 return error;
733 }
734
735 STATIC int
736 xfs_ioc_bulkstat(
737 xfs_mount_t *mp,
738 unsigned int cmd,
739 void __user *arg)
740 {
741 xfs_fsop_bulkreq_t bulkreq;
742 int count; /* # of records returned */
743 xfs_ino_t inlast; /* last inode number */
744 int done;
745 int error;
746
747 /* done = 1 if there are more stats to get and if bulkstat */
748 /* should be called again (unused here, but used in dmapi) */
749
750 if (!capable(CAP_SYS_ADMIN))
751 return -EPERM;
752
753 if (XFS_FORCED_SHUTDOWN(mp))
754 return -EIO;
755
756 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
757 return -EFAULT;
758
759 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
760 return -EFAULT;
761
762 if ((count = bulkreq.icount) <= 0)
763 return -EINVAL;
764
765 if (bulkreq.ubuffer == NULL)
766 return -EINVAL;
767
768 if (cmd == XFS_IOC_FSINUMBERS)
769 error = xfs_inumbers(mp, &inlast, &count,
770 bulkreq.ubuffer, xfs_inumbers_fmt);
771 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
772 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
773 sizeof(xfs_bstat_t), NULL, &done);
774 else /* XFS_IOC_FSBULKSTAT */
775 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
776 sizeof(xfs_bstat_t), bulkreq.ubuffer,
777 &done);
778
779 if (error)
780 return error;
781
782 if (bulkreq.ocount != NULL) {
783 if (copy_to_user(bulkreq.lastip, &inlast,
784 sizeof(xfs_ino_t)))
785 return -EFAULT;
786
787 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
788 return -EFAULT;
789 }
790
791 return 0;
792 }
793
794 STATIC int
795 xfs_ioc_fsgeometry_v1(
796 xfs_mount_t *mp,
797 void __user *arg)
798 {
799 xfs_fsop_geom_t fsgeo;
800 int error;
801
802 error = xfs_fs_geometry(mp, &fsgeo, 3);
803 if (error)
804 return error;
805
806 /*
807 * Caller should have passed an argument of type
808 * xfs_fsop_geom_v1_t. This is a proper subset of the
809 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
810 */
811 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
812 return -EFAULT;
813 return 0;
814 }
815
816 STATIC int
817 xfs_ioc_fsgeometry(
818 xfs_mount_t *mp,
819 void __user *arg)
820 {
821 xfs_fsop_geom_t fsgeo;
822 int error;
823
824 error = xfs_fs_geometry(mp, &fsgeo, 4);
825 if (error)
826 return error;
827
828 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
829 return -EFAULT;
830 return 0;
831 }
832
833 /*
834 * Linux extended inode flags interface.
835 */
836
837 STATIC unsigned int
838 xfs_merge_ioc_xflags(
839 unsigned int flags,
840 unsigned int start)
841 {
842 unsigned int xflags = start;
843
844 if (flags & FS_IMMUTABLE_FL)
845 xflags |= FS_XFLAG_IMMUTABLE;
846 else
847 xflags &= ~FS_XFLAG_IMMUTABLE;
848 if (flags & FS_APPEND_FL)
849 xflags |= FS_XFLAG_APPEND;
850 else
851 xflags &= ~FS_XFLAG_APPEND;
852 if (flags & FS_SYNC_FL)
853 xflags |= FS_XFLAG_SYNC;
854 else
855 xflags &= ~FS_XFLAG_SYNC;
856 if (flags & FS_NOATIME_FL)
857 xflags |= FS_XFLAG_NOATIME;
858 else
859 xflags &= ~FS_XFLAG_NOATIME;
860 if (flags & FS_NODUMP_FL)
861 xflags |= FS_XFLAG_NODUMP;
862 else
863 xflags &= ~FS_XFLAG_NODUMP;
864
865 return xflags;
866 }
867
868 STATIC unsigned int
869 xfs_di2lxflags(
870 __uint16_t di_flags)
871 {
872 unsigned int flags = 0;
873
874 if (di_flags & XFS_DIFLAG_IMMUTABLE)
875 flags |= FS_IMMUTABLE_FL;
876 if (di_flags & XFS_DIFLAG_APPEND)
877 flags |= FS_APPEND_FL;
878 if (di_flags & XFS_DIFLAG_SYNC)
879 flags |= FS_SYNC_FL;
880 if (di_flags & XFS_DIFLAG_NOATIME)
881 flags |= FS_NOATIME_FL;
882 if (di_flags & XFS_DIFLAG_NODUMP)
883 flags |= FS_NODUMP_FL;
884 return flags;
885 }
886
887 STATIC int
888 xfs_ioc_fsgetxattr(
889 xfs_inode_t *ip,
890 int attr,
891 void __user *arg)
892 {
893 struct fsxattr fa;
894
895 memset(&fa, 0, sizeof(struct fsxattr));
896
897 xfs_ilock(ip, XFS_ILOCK_SHARED);
898 fa.fsx_xflags = xfs_ip2xflags(ip);
899 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
900 fa.fsx_projid = xfs_get_projid(ip);
901
902 if (attr) {
903 if (ip->i_afp) {
904 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
905 fa.fsx_nextents = ip->i_afp->if_bytes /
906 sizeof(xfs_bmbt_rec_t);
907 else
908 fa.fsx_nextents = ip->i_d.di_anextents;
909 } else
910 fa.fsx_nextents = 0;
911 } else {
912 if (ip->i_df.if_flags & XFS_IFEXTENTS)
913 fa.fsx_nextents = ip->i_df.if_bytes /
914 sizeof(xfs_bmbt_rec_t);
915 else
916 fa.fsx_nextents = ip->i_d.di_nextents;
917 }
918 xfs_iunlock(ip, XFS_ILOCK_SHARED);
919
920 if (copy_to_user(arg, &fa, sizeof(fa)))
921 return -EFAULT;
922 return 0;
923 }
924
925 STATIC void
926 xfs_set_diflags(
927 struct xfs_inode *ip,
928 unsigned int xflags)
929 {
930 unsigned int di_flags;
931 uint64_t di_flags2;
932
933 /* can't set PREALLOC this way, just preserve it */
934 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
935 if (xflags & FS_XFLAG_IMMUTABLE)
936 di_flags |= XFS_DIFLAG_IMMUTABLE;
937 if (xflags & FS_XFLAG_APPEND)
938 di_flags |= XFS_DIFLAG_APPEND;
939 if (xflags & FS_XFLAG_SYNC)
940 di_flags |= XFS_DIFLAG_SYNC;
941 if (xflags & FS_XFLAG_NOATIME)
942 di_flags |= XFS_DIFLAG_NOATIME;
943 if (xflags & FS_XFLAG_NODUMP)
944 di_flags |= XFS_DIFLAG_NODUMP;
945 if (xflags & FS_XFLAG_NODEFRAG)
946 di_flags |= XFS_DIFLAG_NODEFRAG;
947 if (xflags & FS_XFLAG_FILESTREAM)
948 di_flags |= XFS_DIFLAG_FILESTREAM;
949 if (S_ISDIR(VFS_I(ip)->i_mode)) {
950 if (xflags & FS_XFLAG_RTINHERIT)
951 di_flags |= XFS_DIFLAG_RTINHERIT;
952 if (xflags & FS_XFLAG_NOSYMLINKS)
953 di_flags |= XFS_DIFLAG_NOSYMLINKS;
954 if (xflags & FS_XFLAG_EXTSZINHERIT)
955 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
956 if (xflags & FS_XFLAG_PROJINHERIT)
957 di_flags |= XFS_DIFLAG_PROJINHERIT;
958 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
959 if (xflags & FS_XFLAG_REALTIME)
960 di_flags |= XFS_DIFLAG_REALTIME;
961 if (xflags & FS_XFLAG_EXTSIZE)
962 di_flags |= XFS_DIFLAG_EXTSIZE;
963 }
964 ip->i_d.di_flags = di_flags;
965
966 /* diflags2 only valid for v3 inodes. */
967 if (ip->i_d.di_version < 3)
968 return;
969
970 di_flags2 = 0;
971 if (xflags & FS_XFLAG_DAX)
972 di_flags2 |= XFS_DIFLAG2_DAX;
973
974 ip->i_d.di_flags2 = di_flags2;
975
976 }
977
978 STATIC void
979 xfs_diflags_to_linux(
980 struct xfs_inode *ip)
981 {
982 struct inode *inode = VFS_I(ip);
983 unsigned int xflags = xfs_ip2xflags(ip);
984
985 if (xflags & FS_XFLAG_IMMUTABLE)
986 inode->i_flags |= S_IMMUTABLE;
987 else
988 inode->i_flags &= ~S_IMMUTABLE;
989 if (xflags & FS_XFLAG_APPEND)
990 inode->i_flags |= S_APPEND;
991 else
992 inode->i_flags &= ~S_APPEND;
993 if (xflags & FS_XFLAG_SYNC)
994 inode->i_flags |= S_SYNC;
995 else
996 inode->i_flags &= ~S_SYNC;
997 if (xflags & FS_XFLAG_NOATIME)
998 inode->i_flags |= S_NOATIME;
999 else
1000 inode->i_flags &= ~S_NOATIME;
1001 if (xflags & FS_XFLAG_DAX)
1002 inode->i_flags |= S_DAX;
1003 else
1004 inode->i_flags &= ~S_DAX;
1005
1006 }
1007
1008 static int
1009 xfs_ioctl_setattr_xflags(
1010 struct xfs_trans *tp,
1011 struct xfs_inode *ip,
1012 struct fsxattr *fa)
1013 {
1014 struct xfs_mount *mp = ip->i_mount;
1015
1016 /* Can't change realtime flag if any extents are allocated. */
1017 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1018 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1019 return -EINVAL;
1020
1021 /* If realtime flag is set then must have realtime device */
1022 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1023 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1024 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1025 return -EINVAL;
1026 }
1027
1028 /*
1029 * Can't modify an immutable/append-only file unless
1030 * we have appropriate permission.
1031 */
1032 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1033 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1034 !capable(CAP_LINUX_IMMUTABLE))
1035 return -EPERM;
1036
1037 xfs_set_diflags(ip, fa->fsx_xflags);
1038 xfs_diflags_to_linux(ip);
1039 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1040 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1041 XFS_STATS_INC(mp, xs_ig_attrchg);
1042 return 0;
1043 }
1044
1045 /*
1046 * If we are changing DAX flags, we have to ensure the file is clean and any
1047 * cached objects in the address space are invalidated and removed. This
1048 * requires us to lock out other IO and page faults similar to a truncate
1049 * operation. The locks need to be held until the transaction has been committed
1050 * so that the cache invalidation is atomic with respect to the DAX flag
1051 * manipulation.
1052 */
1053 static int
1054 xfs_ioctl_setattr_dax_invalidate(
1055 struct xfs_inode *ip,
1056 struct fsxattr *fa,
1057 int *join_flags)
1058 {
1059 struct inode *inode = VFS_I(ip);
1060 int error;
1061
1062 *join_flags = 0;
1063
1064 /*
1065 * It is only valid to set the DAX flag on regular files and
1066 * directories on filesystems where the block size is equal to the page
1067 * size. On directories it serves as an inherit hint.
1068 */
1069 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1070 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1071 return -EINVAL;
1072 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1073 return -EINVAL;
1074 }
1075
1076 /* If the DAX state is not changing, we have nothing to do here. */
1077 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1078 return 0;
1079 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1080 return 0;
1081
1082 /* lock, flush and invalidate mapping in preparation for flag change */
1083 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1084 error = filemap_write_and_wait(inode->i_mapping);
1085 if (error)
1086 goto out_unlock;
1087 error = invalidate_inode_pages2(inode->i_mapping);
1088 if (error)
1089 goto out_unlock;
1090
1091 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1092 return 0;
1093
1094 out_unlock:
1095 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1096 return error;
1097
1098 }
1099
1100 /*
1101 * Set up the transaction structure for the setattr operation, checking that we
1102 * have permission to do so. On success, return a clean transaction and the
1103 * inode locked exclusively ready for further operation specific checks. On
1104 * failure, return an error without modifying or locking the inode.
1105 *
1106 * The inode might already be IO locked on call. If this is the case, it is
1107 * indicated in @join_flags and we take full responsibility for ensuring they
1108 * are unlocked from now on. Hence if we have an error here, we still have to
1109 * unlock them. Otherwise, once they are joined to the transaction, they will
1110 * be unlocked on commit/cancel.
1111 */
1112 static struct xfs_trans *
1113 xfs_ioctl_setattr_get_trans(
1114 struct xfs_inode *ip,
1115 int join_flags)
1116 {
1117 struct xfs_mount *mp = ip->i_mount;
1118 struct xfs_trans *tp;
1119 int error = -EROFS;
1120
1121 if (mp->m_flags & XFS_MOUNT_RDONLY)
1122 goto out_unlock;
1123 error = -EIO;
1124 if (XFS_FORCED_SHUTDOWN(mp))
1125 goto out_unlock;
1126
1127 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1128 if (error)
1129 return ERR_PTR(error);
1130
1131 xfs_ilock(ip, XFS_ILOCK_EXCL);
1132 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1133 join_flags = 0;
1134
1135 /*
1136 * CAP_FOWNER overrides the following restrictions:
1137 *
1138 * The user ID of the calling process must be equal to the file owner
1139 * ID, except in cases where the CAP_FSETID capability is applicable.
1140 */
1141 if (!inode_owner_or_capable(VFS_I(ip))) {
1142 error = -EPERM;
1143 goto out_cancel;
1144 }
1145
1146 if (mp->m_flags & XFS_MOUNT_WSYNC)
1147 xfs_trans_set_sync(tp);
1148
1149 return tp;
1150
1151 out_cancel:
1152 xfs_trans_cancel(tp);
1153 out_unlock:
1154 if (join_flags)
1155 xfs_iunlock(ip, join_flags);
1156 return ERR_PTR(error);
1157 }
1158
1159 /*
1160 * extent size hint validation is somewhat cumbersome. Rules are:
1161 *
1162 * 1. extent size hint is only valid for directories and regular files
1163 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1164 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1165 * 4. can only be changed on regular files if no extents are allocated
1166 * 5. can be changed on directories at any time
1167 * 6. extsize hint of 0 turns off hints, clears inode flags.
1168 * 7. Extent size must be a multiple of the appropriate block size.
1169 * 8. for non-realtime files, the extent size hint must be limited
1170 * to half the AG size to avoid alignment extending the extent beyond the
1171 * limits of the AG.
1172 */
1173 static int
1174 xfs_ioctl_setattr_check_extsize(
1175 struct xfs_inode *ip,
1176 struct fsxattr *fa)
1177 {
1178 struct xfs_mount *mp = ip->i_mount;
1179
1180 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1181 return -EINVAL;
1182
1183 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1184 !S_ISDIR(VFS_I(ip)->i_mode))
1185 return -EINVAL;
1186
1187 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1188 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1189 return -EINVAL;
1190
1191 if (fa->fsx_extsize != 0) {
1192 xfs_extlen_t size;
1193 xfs_fsblock_t extsize_fsb;
1194
1195 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1196 if (extsize_fsb > MAXEXTLEN)
1197 return -EINVAL;
1198
1199 if (XFS_IS_REALTIME_INODE(ip) ||
1200 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1201 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1202 } else {
1203 size = mp->m_sb.sb_blocksize;
1204 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1205 return -EINVAL;
1206 }
1207
1208 if (fa->fsx_extsize % size)
1209 return -EINVAL;
1210 } else
1211 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1212
1213 return 0;
1214 }
1215
1216 static int
1217 xfs_ioctl_setattr_check_projid(
1218 struct xfs_inode *ip,
1219 struct fsxattr *fa)
1220 {
1221 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1222 if (fa->fsx_projid > (__uint16_t)-1 &&
1223 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1224 return -EINVAL;
1225
1226 /*
1227 * Project Quota ID state is only allowed to change from within the init
1228 * namespace. Enforce that restriction only if we are trying to change
1229 * the quota ID state. Everything else is allowed in user namespaces.
1230 */
1231 if (current_user_ns() == &init_user_ns)
1232 return 0;
1233
1234 if (xfs_get_projid(ip) != fa->fsx_projid)
1235 return -EINVAL;
1236 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1237 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1238 return -EINVAL;
1239
1240 return 0;
1241 }
1242
1243 STATIC int
1244 xfs_ioctl_setattr(
1245 xfs_inode_t *ip,
1246 struct fsxattr *fa)
1247 {
1248 struct xfs_mount *mp = ip->i_mount;
1249 struct xfs_trans *tp;
1250 struct xfs_dquot *udqp = NULL;
1251 struct xfs_dquot *pdqp = NULL;
1252 struct xfs_dquot *olddquot = NULL;
1253 int code;
1254 int join_flags = 0;
1255
1256 trace_xfs_ioctl_setattr(ip);
1257
1258 code = xfs_ioctl_setattr_check_projid(ip, fa);
1259 if (code)
1260 return code;
1261
1262 /*
1263 * If disk quotas is on, we make sure that the dquots do exist on disk,
1264 * before we start any other transactions. Trying to do this later
1265 * is messy. We don't care to take a readlock to look at the ids
1266 * in inode here, because we can't hold it across the trans_reserve.
1267 * If the IDs do change before we take the ilock, we're covered
1268 * because the i_*dquot fields will get updated anyway.
1269 */
1270 if (XFS_IS_QUOTA_ON(mp)) {
1271 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1272 ip->i_d.di_gid, fa->fsx_projid,
1273 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1274 if (code)
1275 return code;
1276 }
1277
1278 /*
1279 * Changing DAX config may require inode locking for mapping
1280 * invalidation. These need to be held all the way to transaction commit
1281 * or cancel time, so need to be passed through to
1282 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1283 * appropriately.
1284 */
1285 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1286 if (code)
1287 goto error_free_dquots;
1288
1289 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1290 if (IS_ERR(tp)) {
1291 code = PTR_ERR(tp);
1292 goto error_free_dquots;
1293 }
1294
1295
1296 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1297 xfs_get_projid(ip) != fa->fsx_projid) {
1298 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1299 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1300 if (code) /* out of quota */
1301 goto error_trans_cancel;
1302 }
1303
1304 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1305 if (code)
1306 goto error_trans_cancel;
1307
1308 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1309 if (code)
1310 goto error_trans_cancel;
1311
1312 /*
1313 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1314 * overrides the following restrictions:
1315 *
1316 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1317 * successful return from chown()
1318 */
1319
1320 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1321 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1322 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1323
1324 /* Change the ownerships and register project quota modifications */
1325 if (xfs_get_projid(ip) != fa->fsx_projid) {
1326 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1327 olddquot = xfs_qm_vop_chown(tp, ip,
1328 &ip->i_pdquot, pdqp);
1329 }
1330 ASSERT(ip->i_d.di_version > 1);
1331 xfs_set_projid(ip, fa->fsx_projid);
1332 }
1333
1334 /*
1335 * Only set the extent size hint if we've already determined that the
1336 * extent size hint should be set on the inode. If no extent size flags
1337 * are set on the inode then unconditionally clear the extent size hint.
1338 */
1339 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1340 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1341 else
1342 ip->i_d.di_extsize = 0;
1343
1344 code = xfs_trans_commit(tp);
1345
1346 /*
1347 * Release any dquot(s) the inode had kept before chown.
1348 */
1349 xfs_qm_dqrele(olddquot);
1350 xfs_qm_dqrele(udqp);
1351 xfs_qm_dqrele(pdqp);
1352
1353 return code;
1354
1355 error_trans_cancel:
1356 xfs_trans_cancel(tp);
1357 error_free_dquots:
1358 xfs_qm_dqrele(udqp);
1359 xfs_qm_dqrele(pdqp);
1360 return code;
1361 }
1362
1363 STATIC int
1364 xfs_ioc_fssetxattr(
1365 xfs_inode_t *ip,
1366 struct file *filp,
1367 void __user *arg)
1368 {
1369 struct fsxattr fa;
1370 int error;
1371
1372 if (copy_from_user(&fa, arg, sizeof(fa)))
1373 return -EFAULT;
1374
1375 error = mnt_want_write_file(filp);
1376 if (error)
1377 return error;
1378 error = xfs_ioctl_setattr(ip, &fa);
1379 mnt_drop_write_file(filp);
1380 return error;
1381 }
1382
1383 STATIC int
1384 xfs_ioc_getxflags(
1385 xfs_inode_t *ip,
1386 void __user *arg)
1387 {
1388 unsigned int flags;
1389
1390 flags = xfs_di2lxflags(ip->i_d.di_flags);
1391 if (copy_to_user(arg, &flags, sizeof(flags)))
1392 return -EFAULT;
1393 return 0;
1394 }
1395
1396 STATIC int
1397 xfs_ioc_setxflags(
1398 struct xfs_inode *ip,
1399 struct file *filp,
1400 void __user *arg)
1401 {
1402 struct xfs_trans *tp;
1403 struct fsxattr fa;
1404 unsigned int flags;
1405 int join_flags = 0;
1406 int error;
1407
1408 if (copy_from_user(&flags, arg, sizeof(flags)))
1409 return -EFAULT;
1410
1411 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1412 FS_NOATIME_FL | FS_NODUMP_FL | \
1413 FS_SYNC_FL))
1414 return -EOPNOTSUPP;
1415
1416 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1417
1418 error = mnt_want_write_file(filp);
1419 if (error)
1420 return error;
1421
1422 /*
1423 * Changing DAX config may require inode locking for mapping
1424 * invalidation. These need to be held all the way to transaction commit
1425 * or cancel time, so need to be passed through to
1426 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1427 * appropriately.
1428 */
1429 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1430 if (error)
1431 goto out_drop_write;
1432
1433 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1434 if (IS_ERR(tp)) {
1435 error = PTR_ERR(tp);
1436 goto out_drop_write;
1437 }
1438
1439 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1440 if (error) {
1441 xfs_trans_cancel(tp);
1442 goto out_drop_write;
1443 }
1444
1445 error = xfs_trans_commit(tp);
1446 out_drop_write:
1447 mnt_drop_write_file(filp);
1448 return error;
1449 }
1450
1451 STATIC int
1452 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1453 {
1454 struct getbmap __user *base = (struct getbmap __user *)*ap;
1455
1456 /* copy only getbmap portion (not getbmapx) */
1457 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1458 return -EFAULT;
1459
1460 *ap += sizeof(struct getbmap);
1461 return 0;
1462 }
1463
1464 STATIC int
1465 xfs_ioc_getbmap(
1466 struct file *file,
1467 unsigned int cmd,
1468 void __user *arg)
1469 {
1470 struct getbmapx bmx;
1471 int error;
1472
1473 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1474 return -EFAULT;
1475
1476 if (bmx.bmv_count < 2)
1477 return -EINVAL;
1478
1479 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1480 if (file->f_mode & FMODE_NOCMTIME)
1481 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1482
1483 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
1484 (__force struct getbmap *)arg+1);
1485 if (error)
1486 return error;
1487
1488 /* copy back header - only size of getbmap */
1489 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1490 return -EFAULT;
1491 return 0;
1492 }
1493
1494 STATIC int
1495 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1496 {
1497 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1498
1499 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1500 return -EFAULT;
1501
1502 *ap += sizeof(struct getbmapx);
1503 return 0;
1504 }
1505
1506 STATIC int
1507 xfs_ioc_getbmapx(
1508 struct xfs_inode *ip,
1509 void __user *arg)
1510 {
1511 struct getbmapx bmx;
1512 int error;
1513
1514 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1515 return -EFAULT;
1516
1517 if (bmx.bmv_count < 2)
1518 return -EINVAL;
1519
1520 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1521 return -EINVAL;
1522
1523 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1524 (__force struct getbmapx *)arg+1);
1525 if (error)
1526 return error;
1527
1528 /* copy back header */
1529 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1530 return -EFAULT;
1531
1532 return 0;
1533 }
1534
1535 int
1536 xfs_ioc_swapext(
1537 xfs_swapext_t *sxp)
1538 {
1539 xfs_inode_t *ip, *tip;
1540 struct fd f, tmp;
1541 int error = 0;
1542
1543 /* Pull information for the target fd */
1544 f = fdget((int)sxp->sx_fdtarget);
1545 if (!f.file) {
1546 error = -EINVAL;
1547 goto out;
1548 }
1549
1550 if (!(f.file->f_mode & FMODE_WRITE) ||
1551 !(f.file->f_mode & FMODE_READ) ||
1552 (f.file->f_flags & O_APPEND)) {
1553 error = -EBADF;
1554 goto out_put_file;
1555 }
1556
1557 tmp = fdget((int)sxp->sx_fdtmp);
1558 if (!tmp.file) {
1559 error = -EINVAL;
1560 goto out_put_file;
1561 }
1562
1563 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1564 !(tmp.file->f_mode & FMODE_READ) ||
1565 (tmp.file->f_flags & O_APPEND)) {
1566 error = -EBADF;
1567 goto out_put_tmp_file;
1568 }
1569
1570 if (IS_SWAPFILE(file_inode(f.file)) ||
1571 IS_SWAPFILE(file_inode(tmp.file))) {
1572 error = -EINVAL;
1573 goto out_put_tmp_file;
1574 }
1575
1576 /*
1577 * We need to ensure that the fds passed in point to XFS inodes
1578 * before we cast and access them as XFS structures as we have no
1579 * control over what the user passes us here.
1580 */
1581 if (f.file->f_op != &xfs_file_operations ||
1582 tmp.file->f_op != &xfs_file_operations) {
1583 error = -EINVAL;
1584 goto out_put_tmp_file;
1585 }
1586
1587 ip = XFS_I(file_inode(f.file));
1588 tip = XFS_I(file_inode(tmp.file));
1589
1590 if (ip->i_mount != tip->i_mount) {
1591 error = -EINVAL;
1592 goto out_put_tmp_file;
1593 }
1594
1595 if (ip->i_ino == tip->i_ino) {
1596 error = -EINVAL;
1597 goto out_put_tmp_file;
1598 }
1599
1600 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1601 error = -EIO;
1602 goto out_put_tmp_file;
1603 }
1604
1605 error = xfs_swap_extents(ip, tip, sxp);
1606
1607 out_put_tmp_file:
1608 fdput(tmp);
1609 out_put_file:
1610 fdput(f);
1611 out:
1612 return error;
1613 }
1614
1615 /*
1616 * Note: some of the ioctl's return positive numbers as a
1617 * byte count indicating success, such as readlink_by_handle.
1618 * So we don't "sign flip" like most other routines. This means
1619 * true errors need to be returned as a negative value.
1620 */
1621 long
1622 xfs_file_ioctl(
1623 struct file *filp,
1624 unsigned int cmd,
1625 unsigned long p)
1626 {
1627 struct inode *inode = file_inode(filp);
1628 struct xfs_inode *ip = XFS_I(inode);
1629 struct xfs_mount *mp = ip->i_mount;
1630 void __user *arg = (void __user *)p;
1631 int error;
1632
1633 trace_xfs_file_ioctl(ip);
1634
1635 switch (cmd) {
1636 case FITRIM:
1637 return xfs_ioc_trim(mp, arg);
1638 case XFS_IOC_ALLOCSP:
1639 case XFS_IOC_FREESP:
1640 case XFS_IOC_RESVSP:
1641 case XFS_IOC_UNRESVSP:
1642 case XFS_IOC_ALLOCSP64:
1643 case XFS_IOC_FREESP64:
1644 case XFS_IOC_RESVSP64:
1645 case XFS_IOC_UNRESVSP64:
1646 case XFS_IOC_ZERO_RANGE: {
1647 xfs_flock64_t bf;
1648
1649 if (copy_from_user(&bf, arg, sizeof(bf)))
1650 return -EFAULT;
1651 return xfs_ioc_space(filp, cmd, &bf);
1652 }
1653 case XFS_IOC_DIOINFO: {
1654 struct dioattr da;
1655 xfs_buftarg_t *target =
1656 XFS_IS_REALTIME_INODE(ip) ?
1657 mp->m_rtdev_targp : mp->m_ddev_targp;
1658
1659 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1660 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1661
1662 if (copy_to_user(arg, &da, sizeof(da)))
1663 return -EFAULT;
1664 return 0;
1665 }
1666
1667 case XFS_IOC_FSBULKSTAT_SINGLE:
1668 case XFS_IOC_FSBULKSTAT:
1669 case XFS_IOC_FSINUMBERS:
1670 return xfs_ioc_bulkstat(mp, cmd, arg);
1671
1672 case XFS_IOC_FSGEOMETRY_V1:
1673 return xfs_ioc_fsgeometry_v1(mp, arg);
1674
1675 case XFS_IOC_FSGEOMETRY:
1676 return xfs_ioc_fsgeometry(mp, arg);
1677
1678 case XFS_IOC_GETVERSION:
1679 return put_user(inode->i_generation, (int __user *)arg);
1680
1681 case XFS_IOC_FSGETXATTR:
1682 return xfs_ioc_fsgetxattr(ip, 0, arg);
1683 case XFS_IOC_FSGETXATTRA:
1684 return xfs_ioc_fsgetxattr(ip, 1, arg);
1685 case XFS_IOC_FSSETXATTR:
1686 return xfs_ioc_fssetxattr(ip, filp, arg);
1687 case XFS_IOC_GETXFLAGS:
1688 return xfs_ioc_getxflags(ip, arg);
1689 case XFS_IOC_SETXFLAGS:
1690 return xfs_ioc_setxflags(ip, filp, arg);
1691
1692 case XFS_IOC_FSSETDM: {
1693 struct fsdmidata dmi;
1694
1695 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1696 return -EFAULT;
1697
1698 error = mnt_want_write_file(filp);
1699 if (error)
1700 return error;
1701
1702 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1703 dmi.fsd_dmstate);
1704 mnt_drop_write_file(filp);
1705 return error;
1706 }
1707
1708 case XFS_IOC_GETBMAP:
1709 case XFS_IOC_GETBMAPA:
1710 return xfs_ioc_getbmap(filp, cmd, arg);
1711
1712 case XFS_IOC_GETBMAPX:
1713 return xfs_ioc_getbmapx(ip, arg);
1714
1715 case XFS_IOC_FD_TO_HANDLE:
1716 case XFS_IOC_PATH_TO_HANDLE:
1717 case XFS_IOC_PATH_TO_FSHANDLE: {
1718 xfs_fsop_handlereq_t hreq;
1719
1720 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1721 return -EFAULT;
1722 return xfs_find_handle(cmd, &hreq);
1723 }
1724 case XFS_IOC_OPEN_BY_HANDLE: {
1725 xfs_fsop_handlereq_t hreq;
1726
1727 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1728 return -EFAULT;
1729 return xfs_open_by_handle(filp, &hreq);
1730 }
1731 case XFS_IOC_FSSETDM_BY_HANDLE:
1732 return xfs_fssetdm_by_handle(filp, arg);
1733
1734 case XFS_IOC_READLINK_BY_HANDLE: {
1735 xfs_fsop_handlereq_t hreq;
1736
1737 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1738 return -EFAULT;
1739 return xfs_readlink_by_handle(filp, &hreq);
1740 }
1741 case XFS_IOC_ATTRLIST_BY_HANDLE:
1742 return xfs_attrlist_by_handle(filp, arg);
1743
1744 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1745 return xfs_attrmulti_by_handle(filp, arg);
1746
1747 case XFS_IOC_SWAPEXT: {
1748 struct xfs_swapext sxp;
1749
1750 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1751 return -EFAULT;
1752 error = mnt_want_write_file(filp);
1753 if (error)
1754 return error;
1755 error = xfs_ioc_swapext(&sxp);
1756 mnt_drop_write_file(filp);
1757 return error;
1758 }
1759
1760 case XFS_IOC_FSCOUNTS: {
1761 xfs_fsop_counts_t out;
1762
1763 error = xfs_fs_counts(mp, &out);
1764 if (error)
1765 return error;
1766
1767 if (copy_to_user(arg, &out, sizeof(out)))
1768 return -EFAULT;
1769 return 0;
1770 }
1771
1772 case XFS_IOC_SET_RESBLKS: {
1773 xfs_fsop_resblks_t inout;
1774 __uint64_t in;
1775
1776 if (!capable(CAP_SYS_ADMIN))
1777 return -EPERM;
1778
1779 if (mp->m_flags & XFS_MOUNT_RDONLY)
1780 return -EROFS;
1781
1782 if (copy_from_user(&inout, arg, sizeof(inout)))
1783 return -EFAULT;
1784
1785 error = mnt_want_write_file(filp);
1786 if (error)
1787 return error;
1788
1789 /* input parameter is passed in resblks field of structure */
1790 in = inout.resblks;
1791 error = xfs_reserve_blocks(mp, &in, &inout);
1792 mnt_drop_write_file(filp);
1793 if (error)
1794 return error;
1795
1796 if (copy_to_user(arg, &inout, sizeof(inout)))
1797 return -EFAULT;
1798 return 0;
1799 }
1800
1801 case XFS_IOC_GET_RESBLKS: {
1802 xfs_fsop_resblks_t out;
1803
1804 if (!capable(CAP_SYS_ADMIN))
1805 return -EPERM;
1806
1807 error = xfs_reserve_blocks(mp, NULL, &out);
1808 if (error)
1809 return error;
1810
1811 if (copy_to_user(arg, &out, sizeof(out)))
1812 return -EFAULT;
1813
1814 return 0;
1815 }
1816
1817 case XFS_IOC_FSGROWFSDATA: {
1818 xfs_growfs_data_t in;
1819
1820 if (copy_from_user(&in, arg, sizeof(in)))
1821 return -EFAULT;
1822
1823 error = mnt_want_write_file(filp);
1824 if (error)
1825 return error;
1826 error = xfs_growfs_data(mp, &in);
1827 mnt_drop_write_file(filp);
1828 return error;
1829 }
1830
1831 case XFS_IOC_FSGROWFSLOG: {
1832 xfs_growfs_log_t in;
1833
1834 if (copy_from_user(&in, arg, sizeof(in)))
1835 return -EFAULT;
1836
1837 error = mnt_want_write_file(filp);
1838 if (error)
1839 return error;
1840 error = xfs_growfs_log(mp, &in);
1841 mnt_drop_write_file(filp);
1842 return error;
1843 }
1844
1845 case XFS_IOC_FSGROWFSRT: {
1846 xfs_growfs_rt_t in;
1847
1848 if (copy_from_user(&in, arg, sizeof(in)))
1849 return -EFAULT;
1850
1851 error = mnt_want_write_file(filp);
1852 if (error)
1853 return error;
1854 error = xfs_growfs_rt(mp, &in);
1855 mnt_drop_write_file(filp);
1856 return error;
1857 }
1858
1859 case XFS_IOC_GOINGDOWN: {
1860 __uint32_t in;
1861
1862 if (!capable(CAP_SYS_ADMIN))
1863 return -EPERM;
1864
1865 if (get_user(in, (__uint32_t __user *)arg))
1866 return -EFAULT;
1867
1868 return xfs_fs_goingdown(mp, in);
1869 }
1870
1871 case XFS_IOC_ERROR_INJECTION: {
1872 xfs_error_injection_t in;
1873
1874 if (!capable(CAP_SYS_ADMIN))
1875 return -EPERM;
1876
1877 if (copy_from_user(&in, arg, sizeof(in)))
1878 return -EFAULT;
1879
1880 return xfs_errortag_add(in.errtag, mp);
1881 }
1882
1883 case XFS_IOC_ERROR_CLEARALL:
1884 if (!capable(CAP_SYS_ADMIN))
1885 return -EPERM;
1886
1887 return xfs_errortag_clearall(mp, 1);
1888
1889 case XFS_IOC_FREE_EOFBLOCKS: {
1890 struct xfs_fs_eofblocks eofb;
1891 struct xfs_eofblocks keofb;
1892
1893 if (!capable(CAP_SYS_ADMIN))
1894 return -EPERM;
1895
1896 if (mp->m_flags & XFS_MOUNT_RDONLY)
1897 return -EROFS;
1898
1899 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1900 return -EFAULT;
1901
1902 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1903 if (error)
1904 return error;
1905
1906 return xfs_icache_free_eofblocks(mp, &keofb);
1907 }
1908
1909 default:
1910 return -ENOTTY;
1911 }
1912 }
Linux kernel - Deliverables
This page took 0.072929 seconds and 5 git commands to generate.