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xfs: better xfs_trans_alloc interface
[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 void *link;
281 int error;
282
283 if (!capable(CAP_SYS_ADMIN))
284 return -EPERM;
285
286 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
287 if (IS_ERR(dentry))
288 return PTR_ERR(dentry);
289
290 /* Restrict this handle operation to symlinks only. */
291 if (!d_is_symlink(dentry)) {
292 error = -EINVAL;
293 goto out_dput;
294 }
295
296 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
297 error = -EFAULT;
298 goto out_dput;
299 }
300
301 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
302 if (!link) {
303 error = -ENOMEM;
304 goto out_dput;
305 }
306
307 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
308 if (error)
309 goto out_kfree;
310 error = readlink_copy(hreq->ohandle, olen, link);
311 if (error)
312 goto out_kfree;
313
314 out_kfree:
315 kfree(link);
316 out_dput:
317 dput(dentry);
318 return error;
319 }
320
321 int
322 xfs_set_dmattrs(
323 xfs_inode_t *ip,
324 u_int evmask,
325 u_int16_t state)
326 {
327 xfs_mount_t *mp = ip->i_mount;
328 xfs_trans_t *tp;
329 int error;
330
331 if (!capable(CAP_SYS_ADMIN))
332 return -EPERM;
333
334 if (XFS_FORCED_SHUTDOWN(mp))
335 return -EIO;
336
337 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
338 if (error)
339 return error;
340
341 xfs_ilock(ip, XFS_ILOCK_EXCL);
342 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
343
344 ip->i_d.di_dmevmask = evmask;
345 ip->i_d.di_dmstate = state;
346
347 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
348 error = xfs_trans_commit(tp);
349
350 return error;
351 }
352
353 STATIC int
354 xfs_fssetdm_by_handle(
355 struct file *parfilp,
356 void __user *arg)
357 {
358 int error;
359 struct fsdmidata fsd;
360 xfs_fsop_setdm_handlereq_t dmhreq;
361 struct dentry *dentry;
362
363 if (!capable(CAP_MKNOD))
364 return -EPERM;
365 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
366 return -EFAULT;
367
368 error = mnt_want_write_file(parfilp);
369 if (error)
370 return error;
371
372 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
373 if (IS_ERR(dentry)) {
374 mnt_drop_write_file(parfilp);
375 return PTR_ERR(dentry);
376 }
377
378 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
379 error = -EPERM;
380 goto out;
381 }
382
383 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
384 error = -EFAULT;
385 goto out;
386 }
387
388 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
389 fsd.fsd_dmstate);
390
391 out:
392 mnt_drop_write_file(parfilp);
393 dput(dentry);
394 return error;
395 }
396
397 STATIC int
398 xfs_attrlist_by_handle(
399 struct file *parfilp,
400 void __user *arg)
401 {
402 int error = -ENOMEM;
403 attrlist_cursor_kern_t *cursor;
404 xfs_fsop_attrlist_handlereq_t al_hreq;
405 struct dentry *dentry;
406 char *kbuf;
407
408 if (!capable(CAP_SYS_ADMIN))
409 return -EPERM;
410 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
411 return -EFAULT;
412 if (al_hreq.buflen < sizeof(struct attrlist) ||
413 al_hreq.buflen > XFS_XATTR_LIST_MAX)
414 return -EINVAL;
415
416 /*
417 * Reject flags, only allow namespaces.
418 */
419 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
420 return -EINVAL;
421
422 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
423 if (IS_ERR(dentry))
424 return PTR_ERR(dentry);
425
426 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
427 if (!kbuf)
428 goto out_dput;
429
430 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
431 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
432 al_hreq.flags, cursor);
433 if (error)
434 goto out_kfree;
435
436 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
437 error = -EFAULT;
438
439 out_kfree:
440 kmem_free(kbuf);
441 out_dput:
442 dput(dentry);
443 return error;
444 }
445
446 int
447 xfs_attrmulti_attr_get(
448 struct inode *inode,
449 unsigned char *name,
450 unsigned char __user *ubuf,
451 __uint32_t *len,
452 __uint32_t flags)
453 {
454 unsigned char *kbuf;
455 int error = -EFAULT;
456
457 if (*len > XFS_XATTR_SIZE_MAX)
458 return -EINVAL;
459 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
460 if (!kbuf)
461 return -ENOMEM;
462
463 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
464 if (error)
465 goto out_kfree;
466
467 if (copy_to_user(ubuf, kbuf, *len))
468 error = -EFAULT;
469
470 out_kfree:
471 kmem_free(kbuf);
472 return error;
473 }
474
475 int
476 xfs_attrmulti_attr_set(
477 struct inode *inode,
478 unsigned char *name,
479 const unsigned char __user *ubuf,
480 __uint32_t len,
481 __uint32_t flags)
482 {
483 unsigned char *kbuf;
484 int error;
485
486 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
487 return -EPERM;
488 if (len > XFS_XATTR_SIZE_MAX)
489 return -EINVAL;
490
491 kbuf = memdup_user(ubuf, len);
492 if (IS_ERR(kbuf))
493 return PTR_ERR(kbuf);
494
495 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
496 if (!error)
497 xfs_forget_acl(inode, name, flags);
498 kfree(kbuf);
499 return error;
500 }
501
502 int
503 xfs_attrmulti_attr_remove(
504 struct inode *inode,
505 unsigned char *name,
506 __uint32_t flags)
507 {
508 int error;
509
510 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
511 return -EPERM;
512 error = xfs_attr_remove(XFS_I(inode), name, flags);
513 if (!error)
514 xfs_forget_acl(inode, name, flags);
515 return error;
516 }
517
518 STATIC int
519 xfs_attrmulti_by_handle(
520 struct file *parfilp,
521 void __user *arg)
522 {
523 int error;
524 xfs_attr_multiop_t *ops;
525 xfs_fsop_attrmulti_handlereq_t am_hreq;
526 struct dentry *dentry;
527 unsigned int i, size;
528 unsigned char *attr_name;
529
530 if (!capable(CAP_SYS_ADMIN))
531 return -EPERM;
532 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
533 return -EFAULT;
534
535 /* overflow check */
536 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
537 return -E2BIG;
538
539 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
540 if (IS_ERR(dentry))
541 return PTR_ERR(dentry);
542
543 error = -E2BIG;
544 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
545 if (!size || size > 16 * PAGE_SIZE)
546 goto out_dput;
547
548 ops = memdup_user(am_hreq.ops, size);
549 if (IS_ERR(ops)) {
550 error = PTR_ERR(ops);
551 goto out_dput;
552 }
553
554 error = -ENOMEM;
555 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
556 if (!attr_name)
557 goto out_kfree_ops;
558
559 error = 0;
560 for (i = 0; i < am_hreq.opcount; i++) {
561 ops[i].am_error = strncpy_from_user((char *)attr_name,
562 ops[i].am_attrname, MAXNAMELEN);
563 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
564 error = -ERANGE;
565 if (ops[i].am_error < 0)
566 break;
567
568 switch (ops[i].am_opcode) {
569 case ATTR_OP_GET:
570 ops[i].am_error = xfs_attrmulti_attr_get(
571 d_inode(dentry), attr_name,
572 ops[i].am_attrvalue, &ops[i].am_length,
573 ops[i].am_flags);
574 break;
575 case ATTR_OP_SET:
576 ops[i].am_error = mnt_want_write_file(parfilp);
577 if (ops[i].am_error)
578 break;
579 ops[i].am_error = xfs_attrmulti_attr_set(
580 d_inode(dentry), attr_name,
581 ops[i].am_attrvalue, ops[i].am_length,
582 ops[i].am_flags);
583 mnt_drop_write_file(parfilp);
584 break;
585 case ATTR_OP_REMOVE:
586 ops[i].am_error = mnt_want_write_file(parfilp);
587 if (ops[i].am_error)
588 break;
589 ops[i].am_error = xfs_attrmulti_attr_remove(
590 d_inode(dentry), attr_name,
591 ops[i].am_flags);
592 mnt_drop_write_file(parfilp);
593 break;
594 default:
595 ops[i].am_error = -EINVAL;
596 }
597 }
598
599 if (copy_to_user(am_hreq.ops, ops, size))
600 error = -EFAULT;
601
602 kfree(attr_name);
603 out_kfree_ops:
604 kfree(ops);
605 out_dput:
606 dput(dentry);
607 return error;
608 }
609
610 int
611 xfs_ioc_space(
612 struct xfs_inode *ip,
613 struct inode *inode,
614 struct file *filp,
615 int ioflags,
616 unsigned int cmd,
617 xfs_flock64_t *bf)
618 {
619 struct iattr iattr;
620 enum xfs_prealloc_flags flags = 0;
621 uint iolock = XFS_IOLOCK_EXCL;
622 int error;
623
624 /*
625 * Only allow the sys admin to reserve space unless
626 * unwritten extents are enabled.
627 */
628 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
629 !capable(CAP_SYS_ADMIN))
630 return -EPERM;
631
632 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
633 return -EPERM;
634
635 if (!(filp->f_mode & FMODE_WRITE))
636 return -EBADF;
637
638 if (!S_ISREG(inode->i_mode))
639 return -EINVAL;
640
641 if (filp->f_flags & O_DSYNC)
642 flags |= XFS_PREALLOC_SYNC;
643 if (ioflags & XFS_IO_INVIS)
644 flags |= XFS_PREALLOC_INVISIBLE;
645
646 error = mnt_want_write_file(filp);
647 if (error)
648 return error;
649
650 xfs_ilock(ip, iolock);
651 error = xfs_break_layouts(inode, &iolock, false);
652 if (error)
653 goto out_unlock;
654
655 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
656 iolock |= XFS_MMAPLOCK_EXCL;
657
658 switch (bf->l_whence) {
659 case 0: /*SEEK_SET*/
660 break;
661 case 1: /*SEEK_CUR*/
662 bf->l_start += filp->f_pos;
663 break;
664 case 2: /*SEEK_END*/
665 bf->l_start += XFS_ISIZE(ip);
666 break;
667 default:
668 error = -EINVAL;
669 goto out_unlock;
670 }
671
672 /*
673 * length of <= 0 for resv/unresv/zero is invalid. length for
674 * alloc/free is ignored completely and we have no idea what userspace
675 * might have set it to, so set it to zero to allow range
676 * checks to pass.
677 */
678 switch (cmd) {
679 case XFS_IOC_ZERO_RANGE:
680 case XFS_IOC_RESVSP:
681 case XFS_IOC_RESVSP64:
682 case XFS_IOC_UNRESVSP:
683 case XFS_IOC_UNRESVSP64:
684 if (bf->l_len <= 0) {
685 error = -EINVAL;
686 goto out_unlock;
687 }
688 break;
689 default:
690 bf->l_len = 0;
691 break;
692 }
693
694 if (bf->l_start < 0 ||
695 bf->l_start > inode->i_sb->s_maxbytes ||
696 bf->l_start + bf->l_len < 0 ||
697 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
698 error = -EINVAL;
699 goto out_unlock;
700 }
701
702 switch (cmd) {
703 case XFS_IOC_ZERO_RANGE:
704 flags |= XFS_PREALLOC_SET;
705 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
706 break;
707 case XFS_IOC_RESVSP:
708 case XFS_IOC_RESVSP64:
709 flags |= XFS_PREALLOC_SET;
710 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
711 XFS_BMAPI_PREALLOC);
712 break;
713 case XFS_IOC_UNRESVSP:
714 case XFS_IOC_UNRESVSP64:
715 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
716 break;
717 case XFS_IOC_ALLOCSP:
718 case XFS_IOC_ALLOCSP64:
719 case XFS_IOC_FREESP:
720 case XFS_IOC_FREESP64:
721 flags |= XFS_PREALLOC_CLEAR;
722 if (bf->l_start > XFS_ISIZE(ip)) {
723 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
724 bf->l_start - XFS_ISIZE(ip), 0);
725 if (error)
726 goto out_unlock;
727 }
728
729 iattr.ia_valid = ATTR_SIZE;
730 iattr.ia_size = bf->l_start;
731
732 error = xfs_setattr_size(ip, &iattr);
733 break;
734 default:
735 ASSERT(0);
736 error = -EINVAL;
737 }
738
739 if (error)
740 goto out_unlock;
741
742 error = xfs_update_prealloc_flags(ip, flags);
743
744 out_unlock:
745 xfs_iunlock(ip, iolock);
746 mnt_drop_write_file(filp);
747 return error;
748 }
749
750 STATIC int
751 xfs_ioc_bulkstat(
752 xfs_mount_t *mp,
753 unsigned int cmd,
754 void __user *arg)
755 {
756 xfs_fsop_bulkreq_t bulkreq;
757 int count; /* # of records returned */
758 xfs_ino_t inlast; /* last inode number */
759 int done;
760 int error;
761
762 /* done = 1 if there are more stats to get and if bulkstat */
763 /* should be called again (unused here, but used in dmapi) */
764
765 if (!capable(CAP_SYS_ADMIN))
766 return -EPERM;
767
768 if (XFS_FORCED_SHUTDOWN(mp))
769 return -EIO;
770
771 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
772 return -EFAULT;
773
774 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
775 return -EFAULT;
776
777 if ((count = bulkreq.icount) <= 0)
778 return -EINVAL;
779
780 if (bulkreq.ubuffer == NULL)
781 return -EINVAL;
782
783 if (cmd == XFS_IOC_FSINUMBERS)
784 error = xfs_inumbers(mp, &inlast, &count,
785 bulkreq.ubuffer, xfs_inumbers_fmt);
786 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
787 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
788 sizeof(xfs_bstat_t), NULL, &done);
789 else /* XFS_IOC_FSBULKSTAT */
790 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
791 sizeof(xfs_bstat_t), bulkreq.ubuffer,
792 &done);
793
794 if (error)
795 return error;
796
797 if (bulkreq.ocount != NULL) {
798 if (copy_to_user(bulkreq.lastip, &inlast,
799 sizeof(xfs_ino_t)))
800 return -EFAULT;
801
802 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
803 return -EFAULT;
804 }
805
806 return 0;
807 }
808
809 STATIC int
810 xfs_ioc_fsgeometry_v1(
811 xfs_mount_t *mp,
812 void __user *arg)
813 {
814 xfs_fsop_geom_t fsgeo;
815 int error;
816
817 error = xfs_fs_geometry(mp, &fsgeo, 3);
818 if (error)
819 return error;
820
821 /*
822 * Caller should have passed an argument of type
823 * xfs_fsop_geom_v1_t. This is a proper subset of the
824 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
825 */
826 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
827 return -EFAULT;
828 return 0;
829 }
830
831 STATIC int
832 xfs_ioc_fsgeometry(
833 xfs_mount_t *mp,
834 void __user *arg)
835 {
836 xfs_fsop_geom_t fsgeo;
837 int error;
838
839 error = xfs_fs_geometry(mp, &fsgeo, 4);
840 if (error)
841 return error;
842
843 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
844 return -EFAULT;
845 return 0;
846 }
847
848 /*
849 * Linux extended inode flags interface.
850 */
851
852 STATIC unsigned int
853 xfs_merge_ioc_xflags(
854 unsigned int flags,
855 unsigned int start)
856 {
857 unsigned int xflags = start;
858
859 if (flags & FS_IMMUTABLE_FL)
860 xflags |= FS_XFLAG_IMMUTABLE;
861 else
862 xflags &= ~FS_XFLAG_IMMUTABLE;
863 if (flags & FS_APPEND_FL)
864 xflags |= FS_XFLAG_APPEND;
865 else
866 xflags &= ~FS_XFLAG_APPEND;
867 if (flags & FS_SYNC_FL)
868 xflags |= FS_XFLAG_SYNC;
869 else
870 xflags &= ~FS_XFLAG_SYNC;
871 if (flags & FS_NOATIME_FL)
872 xflags |= FS_XFLAG_NOATIME;
873 else
874 xflags &= ~FS_XFLAG_NOATIME;
875 if (flags & FS_NODUMP_FL)
876 xflags |= FS_XFLAG_NODUMP;
877 else
878 xflags &= ~FS_XFLAG_NODUMP;
879
880 return xflags;
881 }
882
883 STATIC unsigned int
884 xfs_di2lxflags(
885 __uint16_t di_flags)
886 {
887 unsigned int flags = 0;
888
889 if (di_flags & XFS_DIFLAG_IMMUTABLE)
890 flags |= FS_IMMUTABLE_FL;
891 if (di_flags & XFS_DIFLAG_APPEND)
892 flags |= FS_APPEND_FL;
893 if (di_flags & XFS_DIFLAG_SYNC)
894 flags |= FS_SYNC_FL;
895 if (di_flags & XFS_DIFLAG_NOATIME)
896 flags |= FS_NOATIME_FL;
897 if (di_flags & XFS_DIFLAG_NODUMP)
898 flags |= FS_NODUMP_FL;
899 return flags;
900 }
901
902 STATIC int
903 xfs_ioc_fsgetxattr(
904 xfs_inode_t *ip,
905 int attr,
906 void __user *arg)
907 {
908 struct fsxattr fa;
909
910 memset(&fa, 0, sizeof(struct fsxattr));
911
912 xfs_ilock(ip, XFS_ILOCK_SHARED);
913 fa.fsx_xflags = xfs_ip2xflags(ip);
914 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
915 fa.fsx_projid = xfs_get_projid(ip);
916
917 if (attr) {
918 if (ip->i_afp) {
919 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
920 fa.fsx_nextents = ip->i_afp->if_bytes /
921 sizeof(xfs_bmbt_rec_t);
922 else
923 fa.fsx_nextents = ip->i_d.di_anextents;
924 } else
925 fa.fsx_nextents = 0;
926 } else {
927 if (ip->i_df.if_flags & XFS_IFEXTENTS)
928 fa.fsx_nextents = ip->i_df.if_bytes /
929 sizeof(xfs_bmbt_rec_t);
930 else
931 fa.fsx_nextents = ip->i_d.di_nextents;
932 }
933 xfs_iunlock(ip, XFS_ILOCK_SHARED);
934
935 if (copy_to_user(arg, &fa, sizeof(fa)))
936 return -EFAULT;
937 return 0;
938 }
939
940 STATIC void
941 xfs_set_diflags(
942 struct xfs_inode *ip,
943 unsigned int xflags)
944 {
945 unsigned int di_flags;
946 uint64_t di_flags2;
947
948 /* can't set PREALLOC this way, just preserve it */
949 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
950 if (xflags & FS_XFLAG_IMMUTABLE)
951 di_flags |= XFS_DIFLAG_IMMUTABLE;
952 if (xflags & FS_XFLAG_APPEND)
953 di_flags |= XFS_DIFLAG_APPEND;
954 if (xflags & FS_XFLAG_SYNC)
955 di_flags |= XFS_DIFLAG_SYNC;
956 if (xflags & FS_XFLAG_NOATIME)
957 di_flags |= XFS_DIFLAG_NOATIME;
958 if (xflags & FS_XFLAG_NODUMP)
959 di_flags |= XFS_DIFLAG_NODUMP;
960 if (xflags & FS_XFLAG_NODEFRAG)
961 di_flags |= XFS_DIFLAG_NODEFRAG;
962 if (xflags & FS_XFLAG_FILESTREAM)
963 di_flags |= XFS_DIFLAG_FILESTREAM;
964 if (S_ISDIR(VFS_I(ip)->i_mode)) {
965 if (xflags & FS_XFLAG_RTINHERIT)
966 di_flags |= XFS_DIFLAG_RTINHERIT;
967 if (xflags & FS_XFLAG_NOSYMLINKS)
968 di_flags |= XFS_DIFLAG_NOSYMLINKS;
969 if (xflags & FS_XFLAG_EXTSZINHERIT)
970 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
971 if (xflags & FS_XFLAG_PROJINHERIT)
972 di_flags |= XFS_DIFLAG_PROJINHERIT;
973 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
974 if (xflags & FS_XFLAG_REALTIME)
975 di_flags |= XFS_DIFLAG_REALTIME;
976 if (xflags & FS_XFLAG_EXTSIZE)
977 di_flags |= XFS_DIFLAG_EXTSIZE;
978 }
979 ip->i_d.di_flags = di_flags;
980
981 /* diflags2 only valid for v3 inodes. */
982 if (ip->i_d.di_version < 3)
983 return;
984
985 di_flags2 = 0;
986 if (xflags & FS_XFLAG_DAX)
987 di_flags2 |= XFS_DIFLAG2_DAX;
988
989 ip->i_d.di_flags2 = di_flags2;
990
991 }
992
993 STATIC void
994 xfs_diflags_to_linux(
995 struct xfs_inode *ip)
996 {
997 struct inode *inode = VFS_I(ip);
998 unsigned int xflags = xfs_ip2xflags(ip);
999
1000 if (xflags & FS_XFLAG_IMMUTABLE)
1001 inode->i_flags |= S_IMMUTABLE;
1002 else
1003 inode->i_flags &= ~S_IMMUTABLE;
1004 if (xflags & FS_XFLAG_APPEND)
1005 inode->i_flags |= S_APPEND;
1006 else
1007 inode->i_flags &= ~S_APPEND;
1008 if (xflags & FS_XFLAG_SYNC)
1009 inode->i_flags |= S_SYNC;
1010 else
1011 inode->i_flags &= ~S_SYNC;
1012 if (xflags & FS_XFLAG_NOATIME)
1013 inode->i_flags |= S_NOATIME;
1014 else
1015 inode->i_flags &= ~S_NOATIME;
1016 if (xflags & FS_XFLAG_DAX)
1017 inode->i_flags |= S_DAX;
1018 else
1019 inode->i_flags &= ~S_DAX;
1020
1021 }
1022
1023 static int
1024 xfs_ioctl_setattr_xflags(
1025 struct xfs_trans *tp,
1026 struct xfs_inode *ip,
1027 struct fsxattr *fa)
1028 {
1029 struct xfs_mount *mp = ip->i_mount;
1030
1031 /* Can't change realtime flag if any extents are allocated. */
1032 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1033 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1034 return -EINVAL;
1035
1036 /* If realtime flag is set then must have realtime device */
1037 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1038 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1039 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1040 return -EINVAL;
1041 }
1042
1043 /*
1044 * Can't modify an immutable/append-only file unless
1045 * we have appropriate permission.
1046 */
1047 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1048 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1049 !capable(CAP_LINUX_IMMUTABLE))
1050 return -EPERM;
1051
1052 xfs_set_diflags(ip, fa->fsx_xflags);
1053 xfs_diflags_to_linux(ip);
1054 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1055 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1056 XFS_STATS_INC(mp, xs_ig_attrchg);
1057 return 0;
1058 }
1059
1060 /*
1061 * If we are changing DAX flags, we have to ensure the file is clean and any
1062 * cached objects in the address space are invalidated and removed. This
1063 * requires us to lock out other IO and page faults similar to a truncate
1064 * operation. The locks need to be held until the transaction has been committed
1065 * so that the cache invalidation is atomic with respect to the DAX flag
1066 * manipulation.
1067 */
1068 static int
1069 xfs_ioctl_setattr_dax_invalidate(
1070 struct xfs_inode *ip,
1071 struct fsxattr *fa,
1072 int *join_flags)
1073 {
1074 struct inode *inode = VFS_I(ip);
1075 int error;
1076
1077 *join_flags = 0;
1078
1079 /*
1080 * It is only valid to set the DAX flag on regular files and
1081 * directories on filesystems where the block size is equal to the page
1082 * size. On directories it serves as an inherit hint.
1083 */
1084 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1085 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1086 return -EINVAL;
1087 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1088 return -EINVAL;
1089 }
1090
1091 /* If the DAX state is not changing, we have nothing to do here. */
1092 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1093 return 0;
1094 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1095 return 0;
1096
1097 /* lock, flush and invalidate mapping in preparation for flag change */
1098 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1099 error = filemap_write_and_wait(inode->i_mapping);
1100 if (error)
1101 goto out_unlock;
1102 error = invalidate_inode_pages2(inode->i_mapping);
1103 if (error)
1104 goto out_unlock;
1105
1106 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1107 return 0;
1108
1109 out_unlock:
1110 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1111 return error;
1112
1113 }
1114
1115 /*
1116 * Set up the transaction structure for the setattr operation, checking that we
1117 * have permission to do so. On success, return a clean transaction and the
1118 * inode locked exclusively ready for further operation specific checks. On
1119 * failure, return an error without modifying or locking the inode.
1120 *
1121 * The inode might already be IO locked on call. If this is the case, it is
1122 * indicated in @join_flags and we take full responsibility for ensuring they
1123 * are unlocked from now on. Hence if we have an error here, we still have to
1124 * unlock them. Otherwise, once they are joined to the transaction, they will
1125 * be unlocked on commit/cancel.
1126 */
1127 static struct xfs_trans *
1128 xfs_ioctl_setattr_get_trans(
1129 struct xfs_inode *ip,
1130 int join_flags)
1131 {
1132 struct xfs_mount *mp = ip->i_mount;
1133 struct xfs_trans *tp;
1134 int error = -EROFS;
1135
1136 if (mp->m_flags & XFS_MOUNT_RDONLY)
1137 goto out_unlock;
1138 error = -EIO;
1139 if (XFS_FORCED_SHUTDOWN(mp))
1140 goto out_unlock;
1141
1142 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1143 if (error)
1144 return ERR_PTR(error);
1145
1146 xfs_ilock(ip, XFS_ILOCK_EXCL);
1147 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1148 join_flags = 0;
1149
1150 /*
1151 * CAP_FOWNER overrides the following restrictions:
1152 *
1153 * The user ID of the calling process must be equal to the file owner
1154 * ID, except in cases where the CAP_FSETID capability is applicable.
1155 */
1156 if (!inode_owner_or_capable(VFS_I(ip))) {
1157 error = -EPERM;
1158 goto out_cancel;
1159 }
1160
1161 if (mp->m_flags & XFS_MOUNT_WSYNC)
1162 xfs_trans_set_sync(tp);
1163
1164 return tp;
1165
1166 out_cancel:
1167 xfs_trans_cancel(tp);
1168 out_unlock:
1169 if (join_flags)
1170 xfs_iunlock(ip, join_flags);
1171 return ERR_PTR(error);
1172 }
1173
1174 /*
1175 * extent size hint validation is somewhat cumbersome. Rules are:
1176 *
1177 * 1. extent size hint is only valid for directories and regular files
1178 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1179 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1180 * 4. can only be changed on regular files if no extents are allocated
1181 * 5. can be changed on directories at any time
1182 * 6. extsize hint of 0 turns off hints, clears inode flags.
1183 * 7. Extent size must be a multiple of the appropriate block size.
1184 * 8. for non-realtime files, the extent size hint must be limited
1185 * to half the AG size to avoid alignment extending the extent beyond the
1186 * limits of the AG.
1187 */
1188 static int
1189 xfs_ioctl_setattr_check_extsize(
1190 struct xfs_inode *ip,
1191 struct fsxattr *fa)
1192 {
1193 struct xfs_mount *mp = ip->i_mount;
1194
1195 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1196 return -EINVAL;
1197
1198 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1199 !S_ISDIR(VFS_I(ip)->i_mode))
1200 return -EINVAL;
1201
1202 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1203 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1204 return -EINVAL;
1205
1206 if (fa->fsx_extsize != 0) {
1207 xfs_extlen_t size;
1208 xfs_fsblock_t extsize_fsb;
1209
1210 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1211 if (extsize_fsb > MAXEXTLEN)
1212 return -EINVAL;
1213
1214 if (XFS_IS_REALTIME_INODE(ip) ||
1215 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1216 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1217 } else {
1218 size = mp->m_sb.sb_blocksize;
1219 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1220 return -EINVAL;
1221 }
1222
1223 if (fa->fsx_extsize % size)
1224 return -EINVAL;
1225 } else
1226 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1227
1228 return 0;
1229 }
1230
1231 static int
1232 xfs_ioctl_setattr_check_projid(
1233 struct xfs_inode *ip,
1234 struct fsxattr *fa)
1235 {
1236 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1237 if (fa->fsx_projid > (__uint16_t)-1 &&
1238 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1239 return -EINVAL;
1240
1241 /*
1242 * Project Quota ID state is only allowed to change from within the init
1243 * namespace. Enforce that restriction only if we are trying to change
1244 * the quota ID state. Everything else is allowed in user namespaces.
1245 */
1246 if (current_user_ns() == &init_user_ns)
1247 return 0;
1248
1249 if (xfs_get_projid(ip) != fa->fsx_projid)
1250 return -EINVAL;
1251 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1252 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1253 return -EINVAL;
1254
1255 return 0;
1256 }
1257
1258 STATIC int
1259 xfs_ioctl_setattr(
1260 xfs_inode_t *ip,
1261 struct fsxattr *fa)
1262 {
1263 struct xfs_mount *mp = ip->i_mount;
1264 struct xfs_trans *tp;
1265 struct xfs_dquot *udqp = NULL;
1266 struct xfs_dquot *pdqp = NULL;
1267 struct xfs_dquot *olddquot = NULL;
1268 int code;
1269 int join_flags = 0;
1270
1271 trace_xfs_ioctl_setattr(ip);
1272
1273 code = xfs_ioctl_setattr_check_projid(ip, fa);
1274 if (code)
1275 return code;
1276
1277 /*
1278 * If disk quotas is on, we make sure that the dquots do exist on disk,
1279 * before we start any other transactions. Trying to do this later
1280 * is messy. We don't care to take a readlock to look at the ids
1281 * in inode here, because we can't hold it across the trans_reserve.
1282 * If the IDs do change before we take the ilock, we're covered
1283 * because the i_*dquot fields will get updated anyway.
1284 */
1285 if (XFS_IS_QUOTA_ON(mp)) {
1286 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1287 ip->i_d.di_gid, fa->fsx_projid,
1288 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1289 if (code)
1290 return code;
1291 }
1292
1293 /*
1294 * Changing DAX config may require inode locking for mapping
1295 * invalidation. These need to be held all the way to transaction commit
1296 * or cancel time, so need to be passed through to
1297 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1298 * appropriately.
1299 */
1300 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1301 if (code)
1302 goto error_free_dquots;
1303
1304 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1305 if (IS_ERR(tp)) {
1306 code = PTR_ERR(tp);
1307 goto error_free_dquots;
1308 }
1309
1310
1311 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1312 xfs_get_projid(ip) != fa->fsx_projid) {
1313 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1314 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1315 if (code) /* out of quota */
1316 goto error_trans_cancel;
1317 }
1318
1319 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1320 if (code)
1321 goto error_trans_cancel;
1322
1323 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1324 if (code)
1325 goto error_trans_cancel;
1326
1327 /*
1328 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1329 * overrides the following restrictions:
1330 *
1331 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1332 * successful return from chown()
1333 */
1334
1335 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1336 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1337 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1338
1339 /* Change the ownerships and register project quota modifications */
1340 if (xfs_get_projid(ip) != fa->fsx_projid) {
1341 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1342 olddquot = xfs_qm_vop_chown(tp, ip,
1343 &ip->i_pdquot, pdqp);
1344 }
1345 ASSERT(ip->i_d.di_version > 1);
1346 xfs_set_projid(ip, fa->fsx_projid);
1347 }
1348
1349 /*
1350 * Only set the extent size hint if we've already determined that the
1351 * extent size hint should be set on the inode. If no extent size flags
1352 * are set on the inode then unconditionally clear the extent size hint.
1353 */
1354 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1355 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1356 else
1357 ip->i_d.di_extsize = 0;
1358
1359 code = xfs_trans_commit(tp);
1360
1361 /*
1362 * Release any dquot(s) the inode had kept before chown.
1363 */
1364 xfs_qm_dqrele(olddquot);
1365 xfs_qm_dqrele(udqp);
1366 xfs_qm_dqrele(pdqp);
1367
1368 return code;
1369
1370 error_trans_cancel:
1371 xfs_trans_cancel(tp);
1372 error_free_dquots:
1373 xfs_qm_dqrele(udqp);
1374 xfs_qm_dqrele(pdqp);
1375 return code;
1376 }
1377
1378 STATIC int
1379 xfs_ioc_fssetxattr(
1380 xfs_inode_t *ip,
1381 struct file *filp,
1382 void __user *arg)
1383 {
1384 struct fsxattr fa;
1385 int error;
1386
1387 if (copy_from_user(&fa, arg, sizeof(fa)))
1388 return -EFAULT;
1389
1390 error = mnt_want_write_file(filp);
1391 if (error)
1392 return error;
1393 error = xfs_ioctl_setattr(ip, &fa);
1394 mnt_drop_write_file(filp);
1395 return error;
1396 }
1397
1398 STATIC int
1399 xfs_ioc_getxflags(
1400 xfs_inode_t *ip,
1401 void __user *arg)
1402 {
1403 unsigned int flags;
1404
1405 flags = xfs_di2lxflags(ip->i_d.di_flags);
1406 if (copy_to_user(arg, &flags, sizeof(flags)))
1407 return -EFAULT;
1408 return 0;
1409 }
1410
1411 STATIC int
1412 xfs_ioc_setxflags(
1413 struct xfs_inode *ip,
1414 struct file *filp,
1415 void __user *arg)
1416 {
1417 struct xfs_trans *tp;
1418 struct fsxattr fa;
1419 unsigned int flags;
1420 int join_flags = 0;
1421 int error;
1422
1423 if (copy_from_user(&flags, arg, sizeof(flags)))
1424 return -EFAULT;
1425
1426 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1427 FS_NOATIME_FL | FS_NODUMP_FL | \
1428 FS_SYNC_FL))
1429 return -EOPNOTSUPP;
1430
1431 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1432
1433 error = mnt_want_write_file(filp);
1434 if (error)
1435 return error;
1436
1437 /*
1438 * Changing DAX config may require inode locking for mapping
1439 * invalidation. These need to be held all the way to transaction commit
1440 * or cancel time, so need to be passed through to
1441 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1442 * appropriately.
1443 */
1444 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1445 if (error)
1446 goto out_drop_write;
1447
1448 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1449 if (IS_ERR(tp)) {
1450 error = PTR_ERR(tp);
1451 goto out_drop_write;
1452 }
1453
1454 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1455 if (error) {
1456 xfs_trans_cancel(tp);
1457 goto out_drop_write;
1458 }
1459
1460 error = xfs_trans_commit(tp);
1461 out_drop_write:
1462 mnt_drop_write_file(filp);
1463 return error;
1464 }
1465
1466 STATIC int
1467 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1468 {
1469 struct getbmap __user *base = (struct getbmap __user *)*ap;
1470
1471 /* copy only getbmap portion (not getbmapx) */
1472 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1473 return -EFAULT;
1474
1475 *ap += sizeof(struct getbmap);
1476 return 0;
1477 }
1478
1479 STATIC int
1480 xfs_ioc_getbmap(
1481 struct xfs_inode *ip,
1482 int ioflags,
1483 unsigned int cmd,
1484 void __user *arg)
1485 {
1486 struct getbmapx bmx;
1487 int error;
1488
1489 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1490 return -EFAULT;
1491
1492 if (bmx.bmv_count < 2)
1493 return -EINVAL;
1494
1495 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1496 if (ioflags & XFS_IO_INVIS)
1497 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1498
1499 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1500 (__force struct getbmap *)arg+1);
1501 if (error)
1502 return error;
1503
1504 /* copy back header - only size of getbmap */
1505 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1506 return -EFAULT;
1507 return 0;
1508 }
1509
1510 STATIC int
1511 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1512 {
1513 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1514
1515 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1516 return -EFAULT;
1517
1518 *ap += sizeof(struct getbmapx);
1519 return 0;
1520 }
1521
1522 STATIC int
1523 xfs_ioc_getbmapx(
1524 struct xfs_inode *ip,
1525 void __user *arg)
1526 {
1527 struct getbmapx bmx;
1528 int error;
1529
1530 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1531 return -EFAULT;
1532
1533 if (bmx.bmv_count < 2)
1534 return -EINVAL;
1535
1536 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1537 return -EINVAL;
1538
1539 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1540 (__force struct getbmapx *)arg+1);
1541 if (error)
1542 return error;
1543
1544 /* copy back header */
1545 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1546 return -EFAULT;
1547
1548 return 0;
1549 }
1550
1551 int
1552 xfs_ioc_swapext(
1553 xfs_swapext_t *sxp)
1554 {
1555 xfs_inode_t *ip, *tip;
1556 struct fd f, tmp;
1557 int error = 0;
1558
1559 /* Pull information for the target fd */
1560 f = fdget((int)sxp->sx_fdtarget);
1561 if (!f.file) {
1562 error = -EINVAL;
1563 goto out;
1564 }
1565
1566 if (!(f.file->f_mode & FMODE_WRITE) ||
1567 !(f.file->f_mode & FMODE_READ) ||
1568 (f.file->f_flags & O_APPEND)) {
1569 error = -EBADF;
1570 goto out_put_file;
1571 }
1572
1573 tmp = fdget((int)sxp->sx_fdtmp);
1574 if (!tmp.file) {
1575 error = -EINVAL;
1576 goto out_put_file;
1577 }
1578
1579 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1580 !(tmp.file->f_mode & FMODE_READ) ||
1581 (tmp.file->f_flags & O_APPEND)) {
1582 error = -EBADF;
1583 goto out_put_tmp_file;
1584 }
1585
1586 if (IS_SWAPFILE(file_inode(f.file)) ||
1587 IS_SWAPFILE(file_inode(tmp.file))) {
1588 error = -EINVAL;
1589 goto out_put_tmp_file;
1590 }
1591
1592 ip = XFS_I(file_inode(f.file));
1593 tip = XFS_I(file_inode(tmp.file));
1594
1595 if (ip->i_mount != tip->i_mount) {
1596 error = -EINVAL;
1597 goto out_put_tmp_file;
1598 }
1599
1600 if (ip->i_ino == tip->i_ino) {
1601 error = -EINVAL;
1602 goto out_put_tmp_file;
1603 }
1604
1605 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1606 error = -EIO;
1607 goto out_put_tmp_file;
1608 }
1609
1610 error = xfs_swap_extents(ip, tip, sxp);
1611
1612 out_put_tmp_file:
1613 fdput(tmp);
1614 out_put_file:
1615 fdput(f);
1616 out:
1617 return error;
1618 }
1619
1620 /*
1621 * Note: some of the ioctl's return positive numbers as a
1622 * byte count indicating success, such as readlink_by_handle.
1623 * So we don't "sign flip" like most other routines. This means
1624 * true errors need to be returned as a negative value.
1625 */
1626 long
1627 xfs_file_ioctl(
1628 struct file *filp,
1629 unsigned int cmd,
1630 unsigned long p)
1631 {
1632 struct inode *inode = file_inode(filp);
1633 struct xfs_inode *ip = XFS_I(inode);
1634 struct xfs_mount *mp = ip->i_mount;
1635 void __user *arg = (void __user *)p;
1636 int ioflags = 0;
1637 int error;
1638
1639 if (filp->f_mode & FMODE_NOCMTIME)
1640 ioflags |= XFS_IO_INVIS;
1641
1642 trace_xfs_file_ioctl(ip);
1643
1644 switch (cmd) {
1645 case FITRIM:
1646 return xfs_ioc_trim(mp, arg);
1647 case XFS_IOC_ALLOCSP:
1648 case XFS_IOC_FREESP:
1649 case XFS_IOC_RESVSP:
1650 case XFS_IOC_UNRESVSP:
1651 case XFS_IOC_ALLOCSP64:
1652 case XFS_IOC_FREESP64:
1653 case XFS_IOC_RESVSP64:
1654 case XFS_IOC_UNRESVSP64:
1655 case XFS_IOC_ZERO_RANGE: {
1656 xfs_flock64_t bf;
1657
1658 if (copy_from_user(&bf, arg, sizeof(bf)))
1659 return -EFAULT;
1660 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1661 }
1662 case XFS_IOC_DIOINFO: {
1663 struct dioattr da;
1664 xfs_buftarg_t *target =
1665 XFS_IS_REALTIME_INODE(ip) ?
1666 mp->m_rtdev_targp : mp->m_ddev_targp;
1667
1668 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1669 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1670
1671 if (copy_to_user(arg, &da, sizeof(da)))
1672 return -EFAULT;
1673 return 0;
1674 }
1675
1676 case XFS_IOC_FSBULKSTAT_SINGLE:
1677 case XFS_IOC_FSBULKSTAT:
1678 case XFS_IOC_FSINUMBERS:
1679 return xfs_ioc_bulkstat(mp, cmd, arg);
1680
1681 case XFS_IOC_FSGEOMETRY_V1:
1682 return xfs_ioc_fsgeometry_v1(mp, arg);
1683
1684 case XFS_IOC_FSGEOMETRY:
1685 return xfs_ioc_fsgeometry(mp, arg);
1686
1687 case XFS_IOC_GETVERSION:
1688 return put_user(inode->i_generation, (int __user *)arg);
1689
1690 case XFS_IOC_FSGETXATTR:
1691 return xfs_ioc_fsgetxattr(ip, 0, arg);
1692 case XFS_IOC_FSGETXATTRA:
1693 return xfs_ioc_fsgetxattr(ip, 1, arg);
1694 case XFS_IOC_FSSETXATTR:
1695 return xfs_ioc_fssetxattr(ip, filp, arg);
1696 case XFS_IOC_GETXFLAGS:
1697 return xfs_ioc_getxflags(ip, arg);
1698 case XFS_IOC_SETXFLAGS:
1699 return xfs_ioc_setxflags(ip, filp, arg);
1700
1701 case XFS_IOC_FSSETDM: {
1702 struct fsdmidata dmi;
1703
1704 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1705 return -EFAULT;
1706
1707 error = mnt_want_write_file(filp);
1708 if (error)
1709 return error;
1710
1711 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1712 dmi.fsd_dmstate);
1713 mnt_drop_write_file(filp);
1714 return error;
1715 }
1716
1717 case XFS_IOC_GETBMAP:
1718 case XFS_IOC_GETBMAPA:
1719 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1720
1721 case XFS_IOC_GETBMAPX:
1722 return xfs_ioc_getbmapx(ip, arg);
1723
1724 case XFS_IOC_FD_TO_HANDLE:
1725 case XFS_IOC_PATH_TO_HANDLE:
1726 case XFS_IOC_PATH_TO_FSHANDLE: {
1727 xfs_fsop_handlereq_t hreq;
1728
1729 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1730 return -EFAULT;
1731 return xfs_find_handle(cmd, &hreq);
1732 }
1733 case XFS_IOC_OPEN_BY_HANDLE: {
1734 xfs_fsop_handlereq_t hreq;
1735
1736 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1737 return -EFAULT;
1738 return xfs_open_by_handle(filp, &hreq);
1739 }
1740 case XFS_IOC_FSSETDM_BY_HANDLE:
1741 return xfs_fssetdm_by_handle(filp, arg);
1742
1743 case XFS_IOC_READLINK_BY_HANDLE: {
1744 xfs_fsop_handlereq_t hreq;
1745
1746 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1747 return -EFAULT;
1748 return xfs_readlink_by_handle(filp, &hreq);
1749 }
1750 case XFS_IOC_ATTRLIST_BY_HANDLE:
1751 return xfs_attrlist_by_handle(filp, arg);
1752
1753 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1754 return xfs_attrmulti_by_handle(filp, arg);
1755
1756 case XFS_IOC_SWAPEXT: {
1757 struct xfs_swapext sxp;
1758
1759 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1760 return -EFAULT;
1761 error = mnt_want_write_file(filp);
1762 if (error)
1763 return error;
1764 error = xfs_ioc_swapext(&sxp);
1765 mnt_drop_write_file(filp);
1766 return error;
1767 }
1768
1769 case XFS_IOC_FSCOUNTS: {
1770 xfs_fsop_counts_t out;
1771
1772 error = xfs_fs_counts(mp, &out);
1773 if (error)
1774 return error;
1775
1776 if (copy_to_user(arg, &out, sizeof(out)))
1777 return -EFAULT;
1778 return 0;
1779 }
1780
1781 case XFS_IOC_SET_RESBLKS: {
1782 xfs_fsop_resblks_t inout;
1783 __uint64_t in;
1784
1785 if (!capable(CAP_SYS_ADMIN))
1786 return -EPERM;
1787
1788 if (mp->m_flags & XFS_MOUNT_RDONLY)
1789 return -EROFS;
1790
1791 if (copy_from_user(&inout, arg, sizeof(inout)))
1792 return -EFAULT;
1793
1794 error = mnt_want_write_file(filp);
1795 if (error)
1796 return error;
1797
1798 /* input parameter is passed in resblks field of structure */
1799 in = inout.resblks;
1800 error = xfs_reserve_blocks(mp, &in, &inout);
1801 mnt_drop_write_file(filp);
1802 if (error)
1803 return error;
1804
1805 if (copy_to_user(arg, &inout, sizeof(inout)))
1806 return -EFAULT;
1807 return 0;
1808 }
1809
1810 case XFS_IOC_GET_RESBLKS: {
1811 xfs_fsop_resblks_t out;
1812
1813 if (!capable(CAP_SYS_ADMIN))
1814 return -EPERM;
1815
1816 error = xfs_reserve_blocks(mp, NULL, &out);
1817 if (error)
1818 return error;
1819
1820 if (copy_to_user(arg, &out, sizeof(out)))
1821 return -EFAULT;
1822
1823 return 0;
1824 }
1825
1826 case XFS_IOC_FSGROWFSDATA: {
1827 xfs_growfs_data_t in;
1828
1829 if (copy_from_user(&in, arg, sizeof(in)))
1830 return -EFAULT;
1831
1832 error = mnt_want_write_file(filp);
1833 if (error)
1834 return error;
1835 error = xfs_growfs_data(mp, &in);
1836 mnt_drop_write_file(filp);
1837 return error;
1838 }
1839
1840 case XFS_IOC_FSGROWFSLOG: {
1841 xfs_growfs_log_t in;
1842
1843 if (copy_from_user(&in, arg, sizeof(in)))
1844 return -EFAULT;
1845
1846 error = mnt_want_write_file(filp);
1847 if (error)
1848 return error;
1849 error = xfs_growfs_log(mp, &in);
1850 mnt_drop_write_file(filp);
1851 return error;
1852 }
1853
1854 case XFS_IOC_FSGROWFSRT: {
1855 xfs_growfs_rt_t in;
1856
1857 if (copy_from_user(&in, arg, sizeof(in)))
1858 return -EFAULT;
1859
1860 error = mnt_want_write_file(filp);
1861 if (error)
1862 return error;
1863 error = xfs_growfs_rt(mp, &in);
1864 mnt_drop_write_file(filp);
1865 return error;
1866 }
1867
1868 case XFS_IOC_GOINGDOWN: {
1869 __uint32_t in;
1870
1871 if (!capable(CAP_SYS_ADMIN))
1872 return -EPERM;
1873
1874 if (get_user(in, (__uint32_t __user *)arg))
1875 return -EFAULT;
1876
1877 return xfs_fs_goingdown(mp, in);
1878 }
1879
1880 case XFS_IOC_ERROR_INJECTION: {
1881 xfs_error_injection_t in;
1882
1883 if (!capable(CAP_SYS_ADMIN))
1884 return -EPERM;
1885
1886 if (copy_from_user(&in, arg, sizeof(in)))
1887 return -EFAULT;
1888
1889 return xfs_errortag_add(in.errtag, mp);
1890 }
1891
1892 case XFS_IOC_ERROR_CLEARALL:
1893 if (!capable(CAP_SYS_ADMIN))
1894 return -EPERM;
1895
1896 return xfs_errortag_clearall(mp, 1);
1897
1898 case XFS_IOC_FREE_EOFBLOCKS: {
1899 struct xfs_fs_eofblocks eofb;
1900 struct xfs_eofblocks keofb;
1901
1902 if (!capable(CAP_SYS_ADMIN))
1903 return -EPERM;
1904
1905 if (mp->m_flags & XFS_MOUNT_RDONLY)
1906 return -EROFS;
1907
1908 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1909 return -EFAULT;
1910
1911 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1912 if (error)
1913 return error;
1914
1915 return xfs_icache_free_eofblocks(mp, &keofb);
1916 }
1917
1918 default:
1919 return -ENOTTY;
1920 }
1921 }
Linux kernel - Deliverables
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