1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #include "xfs.h"
7 #include "xfs_fs.h"
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_mount.h"
13 #include "xfs_inode.h"
14 #include "xfs_ioctl.h"
15 #include "xfs_alloc.h"
16 #include "xfs_rtalloc.h"
17 #include "xfs_itable.h"
18 #include "xfs_error.h"
19 #include "xfs_attr.h"
20 #include "xfs_bmap.h"
21 #include "xfs_bmap_util.h"
22 #include "xfs_fsops.h"
23 #include "xfs_discard.h"
24 #include "xfs_quota.h"
25 #include "xfs_export.h"
26 #include "xfs_trace.h"
27 #include "xfs_icache.h"
28 #include "xfs_symlink.h"
29 #include "xfs_trans.h"
30 #include "xfs_acl.h"
31 #include "xfs_btree.h"
32 #include <linux/fsmap.h>
33 #include "xfs_fsmap.h"
34 #include "scrub/xfs_scrub.h"
35 #include "xfs_sb.h"
36
37 #include <linux/capability.h>
38 #include <linux/cred.h>
39 #include <linux/dcache.h>
40 #include <linux/mount.h>
41 #include <linux/namei.h>
42 #include <linux/pagemap.h>
43 #include <linux/slab.h>
44 #include <linux/exportfs.h>
45
46 /*
47 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
48 * a file or fs handle.
49 *
50 * XFS_IOC_PATH_TO_FSHANDLE
51 * returns fs handle for a mount point or path within that mount point
52 * XFS_IOC_FD_TO_HANDLE
53 * returns full handle for a FD opened in user space
54 * XFS_IOC_PATH_TO_HANDLE
55 * returns full handle for a path
56 */
57 int
xfs_find_handle(unsigned int cmd,xfs_fsop_handlereq_t * hreq)58 xfs_find_handle(
59 unsigned int cmd,
60 xfs_fsop_handlereq_t *hreq)
61 {
62 int hsize;
63 xfs_handle_t handle;
64 struct inode *inode;
65 struct fd f = {NULL};
66 struct path path;
67 int error;
68 struct xfs_inode *ip;
69
70 if (cmd == XFS_IOC_FD_TO_HANDLE) {
71 f = fdget(hreq->fd);
72 if (!f.file)
73 return -EBADF;
74 inode = file_inode(f.file);
75 } else {
76 error = user_lpath((const char __user *)hreq->path, &path);
77 if (error)
78 return error;
79 inode = d_inode(path.dentry);
80 }
81 ip = XFS_I(inode);
82
83 /*
84 * We can only generate handles for inodes residing on a XFS filesystem,
85 * and only for regular files, directories or symbolic links.
86 */
87 error = -EINVAL;
88 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
89 goto out_put;
90
91 error = -EBADF;
92 if (!S_ISREG(inode->i_mode) &&
93 !S_ISDIR(inode->i_mode) &&
94 !S_ISLNK(inode->i_mode))
95 goto out_put;
96
97
98 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
99
100 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
101 /*
102 * This handle only contains an fsid, zero the rest.
103 */
104 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
105 hsize = sizeof(xfs_fsid_t);
106 } else {
107 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
108 sizeof(handle.ha_fid.fid_len);
109 handle.ha_fid.fid_pad = 0;
110 handle.ha_fid.fid_gen = inode->i_generation;
111 handle.ha_fid.fid_ino = ip->i_ino;
112 hsize = sizeof(xfs_handle_t);
113 }
114
115 error = -EFAULT;
116 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
117 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
118 goto out_put;
119
120 error = 0;
121
122 out_put:
123 if (cmd == XFS_IOC_FD_TO_HANDLE)
124 fdput(f);
125 else
126 path_put(&path);
127 return error;
128 }
129
130 /*
131 * No need to do permission checks on the various pathname components
132 * as the handle operations are privileged.
133 */
134 STATIC int
xfs_handle_acceptable(void * context,struct dentry * dentry)135 xfs_handle_acceptable(
136 void *context,
137 struct dentry *dentry)
138 {
139 return 1;
140 }
141
142 /*
143 * Convert userspace handle data into a dentry.
144 */
145 struct dentry *
xfs_handle_to_dentry(struct file * parfilp,void __user * uhandle,u32 hlen)146 xfs_handle_to_dentry(
147 struct file *parfilp,
148 void __user *uhandle,
149 u32 hlen)
150 {
151 xfs_handle_t handle;
152 struct xfs_fid64 fid;
153
154 /*
155 * Only allow handle opens under a directory.
156 */
157 if (!S_ISDIR(file_inode(parfilp)->i_mode))
158 return ERR_PTR(-ENOTDIR);
159
160 if (hlen != sizeof(xfs_handle_t))
161 return ERR_PTR(-EINVAL);
162 if (copy_from_user(&handle, uhandle, hlen))
163 return ERR_PTR(-EFAULT);
164 if (handle.ha_fid.fid_len !=
165 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
166 return ERR_PTR(-EINVAL);
167
168 memset(&fid, 0, sizeof(struct fid));
169 fid.ino = handle.ha_fid.fid_ino;
170 fid.gen = handle.ha_fid.fid_gen;
171
172 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
173 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
174 xfs_handle_acceptable, NULL);
175 }
176
177 STATIC struct dentry *
xfs_handlereq_to_dentry(struct file * parfilp,xfs_fsop_handlereq_t * hreq)178 xfs_handlereq_to_dentry(
179 struct file *parfilp,
180 xfs_fsop_handlereq_t *hreq)
181 {
182 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
183 }
184
185 int
xfs_open_by_handle(struct file * parfilp,xfs_fsop_handlereq_t * hreq)186 xfs_open_by_handle(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
189 {
190 const struct cred *cred = current_cred();
191 int error;
192 int fd;
193 int permflag;
194 struct file *filp;
195 struct inode *inode;
196 struct dentry *dentry;
197 fmode_t fmode;
198 struct path path;
199
200 if (!capable(CAP_SYS_ADMIN))
201 return -EPERM;
202
203 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
204 if (IS_ERR(dentry))
205 return PTR_ERR(dentry);
206 inode = d_inode(dentry);
207
208 /* Restrict xfs_open_by_handle to directories & regular files. */
209 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
210 error = -EPERM;
211 goto out_dput;
212 }
213
214 #if BITS_PER_LONG != 32
215 hreq->oflags |= O_LARGEFILE;
216 #endif
217
218 permflag = hreq->oflags;
219 fmode = OPEN_FMODE(permflag);
220 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
221 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
222 error = -EPERM;
223 goto out_dput;
224 }
225
226 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
227 error = -EPERM;
228 goto out_dput;
229 }
230
231 /* Can't write directories. */
232 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
233 error = -EISDIR;
234 goto out_dput;
235 }
236
237 fd = get_unused_fd_flags(0);
238 if (fd < 0) {
239 error = fd;
240 goto out_dput;
241 }
242
243 path.mnt = parfilp->f_path.mnt;
244 path.dentry = dentry;
245 filp = dentry_open(&path, hreq->oflags, cred);
246 dput(dentry);
247 if (IS_ERR(filp)) {
248 put_unused_fd(fd);
249 return PTR_ERR(filp);
250 }
251
252 if (S_ISREG(inode->i_mode)) {
253 filp->f_flags |= O_NOATIME;
254 filp->f_mode |= FMODE_NOCMTIME;
255 }
256
257 fd_install(fd, filp);
258 return fd;
259
260 out_dput:
261 dput(dentry);
262 return error;
263 }
264
265 int
xfs_readlink_by_handle(struct file * parfilp,xfs_fsop_handlereq_t * hreq)266 xfs_readlink_by_handle(
267 struct file *parfilp,
268 xfs_fsop_handlereq_t *hreq)
269 {
270 struct dentry *dentry;
271 __u32 olen;
272 int error;
273
274 if (!capable(CAP_SYS_ADMIN))
275 return -EPERM;
276
277 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
278 if (IS_ERR(dentry))
279 return PTR_ERR(dentry);
280
281 /* Restrict this handle operation to symlinks only. */
282 if (!d_is_symlink(dentry)) {
283 error = -EINVAL;
284 goto out_dput;
285 }
286
287 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
288 error = -EFAULT;
289 goto out_dput;
290 }
291
292 error = vfs_readlink(dentry, hreq->ohandle, olen);
293
294 out_dput:
295 dput(dentry);
296 return error;
297 }
298
299 int
xfs_set_dmattrs(xfs_inode_t * ip,uint evmask,uint16_t state)300 xfs_set_dmattrs(
301 xfs_inode_t *ip,
302 uint evmask,
303 uint16_t state)
304 {
305 xfs_mount_t *mp = ip->i_mount;
306 xfs_trans_t *tp;
307 int error;
308
309 if (!capable(CAP_SYS_ADMIN))
310 return -EPERM;
311
312 if (XFS_FORCED_SHUTDOWN(mp))
313 return -EIO;
314
315 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
316 if (error)
317 return error;
318
319 xfs_ilock(ip, XFS_ILOCK_EXCL);
320 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
321
322 ip->i_d.di_dmevmask = evmask;
323 ip->i_d.di_dmstate = state;
324
325 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
326 error = xfs_trans_commit(tp);
327
328 return error;
329 }
330
331 STATIC int
xfs_fssetdm_by_handle(struct file * parfilp,void __user * arg)332 xfs_fssetdm_by_handle(
333 struct file *parfilp,
334 void __user *arg)
335 {
336 int error;
337 struct fsdmidata fsd;
338 xfs_fsop_setdm_handlereq_t dmhreq;
339 struct dentry *dentry;
340
341 if (!capable(CAP_MKNOD))
342 return -EPERM;
343 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
344 return -EFAULT;
345
346 error = mnt_want_write_file(parfilp);
347 if (error)
348 return error;
349
350 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
351 if (IS_ERR(dentry)) {
352 mnt_drop_write_file(parfilp);
353 return PTR_ERR(dentry);
354 }
355
356 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
357 error = -EPERM;
358 goto out;
359 }
360
361 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
362 error = -EFAULT;
363 goto out;
364 }
365
366 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
367 fsd.fsd_dmstate);
368
369 out:
370 mnt_drop_write_file(parfilp);
371 dput(dentry);
372 return error;
373 }
374
375 STATIC int
xfs_attrlist_by_handle(struct file * parfilp,void __user * arg)376 xfs_attrlist_by_handle(
377 struct file *parfilp,
378 void __user *arg)
379 {
380 int error = -ENOMEM;
381 attrlist_cursor_kern_t *cursor;
382 struct xfs_fsop_attrlist_handlereq __user *p = arg;
383 xfs_fsop_attrlist_handlereq_t al_hreq;
384 struct dentry *dentry;
385 char *kbuf;
386
387 if (!capable(CAP_SYS_ADMIN))
388 return -EPERM;
389 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
390 return -EFAULT;
391 if (al_hreq.buflen < sizeof(struct attrlist) ||
392 al_hreq.buflen > XFS_XATTR_LIST_MAX)
393 return -EINVAL;
394
395 /*
396 * Reject flags, only allow namespaces.
397 */
398 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
399 return -EINVAL;
400
401 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
402 if (IS_ERR(dentry))
403 return PTR_ERR(dentry);
404
405 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
406 if (!kbuf)
407 goto out_dput;
408
409 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
410 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
411 al_hreq.flags, cursor);
412 if (error)
413 goto out_kfree;
414
415 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
416 error = -EFAULT;
417 goto out_kfree;
418 }
419
420 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
421 error = -EFAULT;
422
423 out_kfree:
424 kmem_free(kbuf);
425 out_dput:
426 dput(dentry);
427 return error;
428 }
429
430 int
xfs_attrmulti_attr_get(struct inode * inode,unsigned char * name,unsigned char __user * ubuf,uint32_t * len,uint32_t flags)431 xfs_attrmulti_attr_get(
432 struct inode *inode,
433 unsigned char *name,
434 unsigned char __user *ubuf,
435 uint32_t *len,
436 uint32_t flags)
437 {
438 unsigned char *kbuf;
439 int error = -EFAULT;
440
441 if (*len > XFS_XATTR_SIZE_MAX)
442 return -EINVAL;
443 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
444 if (!kbuf)
445 return -ENOMEM;
446
447 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
448 if (error)
449 goto out_kfree;
450
451 if (copy_to_user(ubuf, kbuf, *len))
452 error = -EFAULT;
453
454 out_kfree:
455 kmem_free(kbuf);
456 return error;
457 }
458
459 int
xfs_attrmulti_attr_set(struct inode * inode,unsigned char * name,const unsigned char __user * ubuf,uint32_t len,uint32_t flags)460 xfs_attrmulti_attr_set(
461 struct inode *inode,
462 unsigned char *name,
463 const unsigned char __user *ubuf,
464 uint32_t len,
465 uint32_t flags)
466 {
467 unsigned char *kbuf;
468 int error;
469
470 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
471 return -EPERM;
472 if (len > XFS_XATTR_SIZE_MAX)
473 return -EINVAL;
474
475 kbuf = memdup_user(ubuf, len);
476 if (IS_ERR(kbuf))
477 return PTR_ERR(kbuf);
478
479 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
480 if (!error)
481 xfs_forget_acl(inode, name, flags);
482 kfree(kbuf);
483 return error;
484 }
485
486 int
xfs_attrmulti_attr_remove(struct inode * inode,unsigned char * name,uint32_t flags)487 xfs_attrmulti_attr_remove(
488 struct inode *inode,
489 unsigned char *name,
490 uint32_t flags)
491 {
492 int error;
493
494 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
495 return -EPERM;
496 error = xfs_attr_remove(XFS_I(inode), name, flags);
497 if (!error)
498 xfs_forget_acl(inode, name, flags);
499 return error;
500 }
501
502 STATIC int
xfs_attrmulti_by_handle(struct file * parfilp,void __user * arg)503 xfs_attrmulti_by_handle(
504 struct file *parfilp,
505 void __user *arg)
506 {
507 int error;
508 xfs_attr_multiop_t *ops;
509 xfs_fsop_attrmulti_handlereq_t am_hreq;
510 struct dentry *dentry;
511 unsigned int i, size;
512 unsigned char *attr_name;
513
514 if (!capable(CAP_SYS_ADMIN))
515 return -EPERM;
516 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
517 return -EFAULT;
518
519 /* overflow check */
520 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
521 return -E2BIG;
522
523 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
524 if (IS_ERR(dentry))
525 return PTR_ERR(dentry);
526
527 error = -E2BIG;
528 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
529 if (!size || size > 16 * PAGE_SIZE)
530 goto out_dput;
531
532 ops = memdup_user(am_hreq.ops, size);
533 if (IS_ERR(ops)) {
534 error = PTR_ERR(ops);
535 goto out_dput;
536 }
537
538 error = -ENOMEM;
539 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
540 if (!attr_name)
541 goto out_kfree_ops;
542
543 error = 0;
544 for (i = 0; i < am_hreq.opcount; i++) {
545 ops[i].am_error = strncpy_from_user((char *)attr_name,
546 ops[i].am_attrname, MAXNAMELEN);
547 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
548 error = -ERANGE;
549 if (ops[i].am_error < 0)
550 break;
551
552 switch (ops[i].am_opcode) {
553 case ATTR_OP_GET:
554 ops[i].am_error = xfs_attrmulti_attr_get(
555 d_inode(dentry), attr_name,
556 ops[i].am_attrvalue, &ops[i].am_length,
557 ops[i].am_flags);
558 break;
559 case ATTR_OP_SET:
560 ops[i].am_error = mnt_want_write_file(parfilp);
561 if (ops[i].am_error)
562 break;
563 ops[i].am_error = xfs_attrmulti_attr_set(
564 d_inode(dentry), attr_name,
565 ops[i].am_attrvalue, ops[i].am_length,
566 ops[i].am_flags);
567 mnt_drop_write_file(parfilp);
568 break;
569 case ATTR_OP_REMOVE:
570 ops[i].am_error = mnt_want_write_file(parfilp);
571 if (ops[i].am_error)
572 break;
573 ops[i].am_error = xfs_attrmulti_attr_remove(
574 d_inode(dentry), attr_name,
575 ops[i].am_flags);
576 mnt_drop_write_file(parfilp);
577 break;
578 default:
579 ops[i].am_error = -EINVAL;
580 }
581 }
582
583 if (copy_to_user(am_hreq.ops, ops, size))
584 error = -EFAULT;
585
586 kfree(attr_name);
587 out_kfree_ops:
588 kfree(ops);
589 out_dput:
590 dput(dentry);
591 return error;
592 }
593
594 int
xfs_ioc_space(struct file * filp,unsigned int cmd,xfs_flock64_t * bf)595 xfs_ioc_space(
596 struct file *filp,
597 unsigned int cmd,
598 xfs_flock64_t *bf)
599 {
600 struct inode *inode = file_inode(filp);
601 struct xfs_inode *ip = XFS_I(inode);
602 struct iattr iattr;
603 enum xfs_prealloc_flags flags = 0;
604 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
605 int error;
606
607 /*
608 * Only allow the sys admin to reserve space unless
609 * unwritten extents are enabled.
610 */
611 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
612 !capable(CAP_SYS_ADMIN))
613 return -EPERM;
614
615 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
616 return -EPERM;
617
618 if (!(filp->f_mode & FMODE_WRITE))
619 return -EBADF;
620
621 if (!S_ISREG(inode->i_mode))
622 return -EINVAL;
623
624 if (filp->f_flags & O_DSYNC)
625 flags |= XFS_PREALLOC_SYNC;
626 if (filp->f_mode & FMODE_NOCMTIME)
627 flags |= XFS_PREALLOC_INVISIBLE;
628
629 error = mnt_want_write_file(filp);
630 if (error)
631 return error;
632
633 xfs_ilock(ip, iolock);
634 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
635 if (error)
636 goto out_unlock;
637
638 switch (bf->l_whence) {
639 case 0: /*SEEK_SET*/
640 break;
641 case 1: /*SEEK_CUR*/
642 bf->l_start += filp->f_pos;
643 break;
644 case 2: /*SEEK_END*/
645 bf->l_start += XFS_ISIZE(ip);
646 break;
647 default:
648 error = -EINVAL;
649 goto out_unlock;
650 }
651
652 /*
653 * length of <= 0 for resv/unresv/zero is invalid. length for
654 * alloc/free is ignored completely and we have no idea what userspace
655 * might have set it to, so set it to zero to allow range
656 * checks to pass.
657 */
658 switch (cmd) {
659 case XFS_IOC_ZERO_RANGE:
660 case XFS_IOC_RESVSP:
661 case XFS_IOC_RESVSP64:
662 case XFS_IOC_UNRESVSP:
663 case XFS_IOC_UNRESVSP64:
664 if (bf->l_len <= 0) {
665 error = -EINVAL;
666 goto out_unlock;
667 }
668 break;
669 default:
670 bf->l_len = 0;
671 break;
672 }
673
674 if (bf->l_start < 0 ||
675 bf->l_start > inode->i_sb->s_maxbytes ||
676 bf->l_start + bf->l_len < 0 ||
677 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
678 error = -EINVAL;
679 goto out_unlock;
680 }
681
682 switch (cmd) {
683 case XFS_IOC_ZERO_RANGE:
684 flags |= XFS_PREALLOC_SET;
685 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
686 break;
687 case XFS_IOC_RESVSP:
688 case XFS_IOC_RESVSP64:
689 flags |= XFS_PREALLOC_SET;
690 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
691 XFS_BMAPI_PREALLOC);
692 break;
693 case XFS_IOC_UNRESVSP:
694 case XFS_IOC_UNRESVSP64:
695 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
696 break;
697 case XFS_IOC_ALLOCSP:
698 case XFS_IOC_ALLOCSP64:
699 case XFS_IOC_FREESP:
700 case XFS_IOC_FREESP64:
701 flags |= XFS_PREALLOC_CLEAR;
702 if (bf->l_start > XFS_ISIZE(ip)) {
703 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
704 bf->l_start - XFS_ISIZE(ip),
705 XFS_BMAPI_PREALLOC);
706 if (error)
707 goto out_unlock;
708 }
709
710 iattr.ia_valid = ATTR_SIZE;
711 iattr.ia_size = bf->l_start;
712
713 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
714 break;
715 default:
716 ASSERT(0);
717 error = -EINVAL;
718 }
719
720 if (error)
721 goto out_unlock;
722
723 error = xfs_update_prealloc_flags(ip, flags);
724
725 out_unlock:
726 xfs_iunlock(ip, iolock);
727 mnt_drop_write_file(filp);
728 return error;
729 }
730
731 STATIC int
xfs_ioc_bulkstat(xfs_mount_t * mp,unsigned int cmd,void __user * arg)732 xfs_ioc_bulkstat(
733 xfs_mount_t *mp,
734 unsigned int cmd,
735 void __user *arg)
736 {
737 xfs_fsop_bulkreq_t bulkreq;
738 int count; /* # of records returned */
739 xfs_ino_t inlast; /* last inode number */
740 int done;
741 int error;
742
743 /* done = 1 if there are more stats to get and if bulkstat */
744 /* should be called again (unused here, but used in dmapi) */
745
746 if (!capable(CAP_SYS_ADMIN))
747 return -EPERM;
748
749 if (XFS_FORCED_SHUTDOWN(mp))
750 return -EIO;
751
752 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
753 return -EFAULT;
754
755 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
756 return -EFAULT;
757
758 if ((count = bulkreq.icount) <= 0)
759 return -EINVAL;
760
761 if (bulkreq.ubuffer == NULL)
762 return -EINVAL;
763
764 if (cmd == XFS_IOC_FSINUMBERS)
765 error = xfs_inumbers(mp, &inlast, &count,
766 bulkreq.ubuffer, xfs_inumbers_fmt);
767 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
768 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
769 sizeof(xfs_bstat_t), NULL, &done);
770 else /* XFS_IOC_FSBULKSTAT */
771 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
772 sizeof(xfs_bstat_t), bulkreq.ubuffer,
773 &done);
774
775 if (error)
776 return error;
777
778 if (bulkreq.ocount != NULL) {
779 if (copy_to_user(bulkreq.lastip, &inlast,
780 sizeof(xfs_ino_t)))
781 return -EFAULT;
782
783 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
784 return -EFAULT;
785 }
786
787 return 0;
788 }
789
790 STATIC int
xfs_ioc_fsgeometry_v1(xfs_mount_t * mp,void __user * arg)791 xfs_ioc_fsgeometry_v1(
792 xfs_mount_t *mp,
793 void __user *arg)
794 {
795 xfs_fsop_geom_t fsgeo;
796 int error;
797
798 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
799 if (error)
800 return error;
801
802 /*
803 * Caller should have passed an argument of type
804 * xfs_fsop_geom_v1_t. This is a proper subset of the
805 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
806 */
807 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
808 return -EFAULT;
809 return 0;
810 }
811
812 STATIC int
xfs_ioc_fsgeometry(xfs_mount_t * mp,void __user * arg)813 xfs_ioc_fsgeometry(
814 xfs_mount_t *mp,
815 void __user *arg)
816 {
817 xfs_fsop_geom_t fsgeo;
818 int error;
819
820 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 4);
821 if (error)
822 return error;
823
824 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
825 return -EFAULT;
826 return 0;
827 }
828
829 /*
830 * Linux extended inode flags interface.
831 */
832
833 STATIC unsigned int
xfs_merge_ioc_xflags(unsigned int flags,unsigned int start)834 xfs_merge_ioc_xflags(
835 unsigned int flags,
836 unsigned int start)
837 {
838 unsigned int xflags = start;
839
840 if (flags & FS_IMMUTABLE_FL)
841 xflags |= FS_XFLAG_IMMUTABLE;
842 else
843 xflags &= ~FS_XFLAG_IMMUTABLE;
844 if (flags & FS_APPEND_FL)
845 xflags |= FS_XFLAG_APPEND;
846 else
847 xflags &= ~FS_XFLAG_APPEND;
848 if (flags & FS_SYNC_FL)
849 xflags |= FS_XFLAG_SYNC;
850 else
851 xflags &= ~FS_XFLAG_SYNC;
852 if (flags & FS_NOATIME_FL)
853 xflags |= FS_XFLAG_NOATIME;
854 else
855 xflags &= ~FS_XFLAG_NOATIME;
856 if (flags & FS_NODUMP_FL)
857 xflags |= FS_XFLAG_NODUMP;
858 else
859 xflags &= ~FS_XFLAG_NODUMP;
860
861 return xflags;
862 }
863
864 STATIC unsigned int
xfs_di2lxflags(uint16_t di_flags)865 xfs_di2lxflags(
866 uint16_t di_flags)
867 {
868 unsigned int flags = 0;
869
870 if (di_flags & XFS_DIFLAG_IMMUTABLE)
871 flags |= FS_IMMUTABLE_FL;
872 if (di_flags & XFS_DIFLAG_APPEND)
873 flags |= FS_APPEND_FL;
874 if (di_flags & XFS_DIFLAG_SYNC)
875 flags |= FS_SYNC_FL;
876 if (di_flags & XFS_DIFLAG_NOATIME)
877 flags |= FS_NOATIME_FL;
878 if (di_flags & XFS_DIFLAG_NODUMP)
879 flags |= FS_NODUMP_FL;
880 return flags;
881 }
882
883 STATIC int
xfs_ioc_fsgetxattr(xfs_inode_t * ip,int attr,void __user * arg)884 xfs_ioc_fsgetxattr(
885 xfs_inode_t *ip,
886 int attr,
887 void __user *arg)
888 {
889 struct fsxattr fa;
890
891 memset(&fa, 0, sizeof(struct fsxattr));
892
893 xfs_ilock(ip, XFS_ILOCK_SHARED);
894 fa.fsx_xflags = xfs_ip2xflags(ip);
895 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
896 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
897 ip->i_mount->m_sb.sb_blocklog;
898 fa.fsx_projid = xfs_get_projid(ip);
899
900 if (attr) {
901 if (ip->i_afp) {
902 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
903 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
904 else
905 fa.fsx_nextents = ip->i_d.di_anextents;
906 } else
907 fa.fsx_nextents = 0;
908 } else {
909 if (ip->i_df.if_flags & XFS_IFEXTENTS)
910 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
911 else
912 fa.fsx_nextents = ip->i_d.di_nextents;
913 }
914 xfs_iunlock(ip, XFS_ILOCK_SHARED);
915
916 if (copy_to_user(arg, &fa, sizeof(fa)))
917 return -EFAULT;
918 return 0;
919 }
920
921 STATIC uint16_t
xfs_flags2diflags(struct xfs_inode * ip,unsigned int xflags)922 xfs_flags2diflags(
923 struct xfs_inode *ip,
924 unsigned int xflags)
925 {
926 /* can't set PREALLOC this way, just preserve it */
927 uint16_t di_flags =
928 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
929
930 if (xflags & FS_XFLAG_IMMUTABLE)
931 di_flags |= XFS_DIFLAG_IMMUTABLE;
932 if (xflags & FS_XFLAG_APPEND)
933 di_flags |= XFS_DIFLAG_APPEND;
934 if (xflags & FS_XFLAG_SYNC)
935 di_flags |= XFS_DIFLAG_SYNC;
936 if (xflags & FS_XFLAG_NOATIME)
937 di_flags |= XFS_DIFLAG_NOATIME;
938 if (xflags & FS_XFLAG_NODUMP)
939 di_flags |= XFS_DIFLAG_NODUMP;
940 if (xflags & FS_XFLAG_NODEFRAG)
941 di_flags |= XFS_DIFLAG_NODEFRAG;
942 if (xflags & FS_XFLAG_FILESTREAM)
943 di_flags |= XFS_DIFLAG_FILESTREAM;
944 if (S_ISDIR(VFS_I(ip)->i_mode)) {
945 if (xflags & FS_XFLAG_RTINHERIT)
946 di_flags |= XFS_DIFLAG_RTINHERIT;
947 if (xflags & FS_XFLAG_NOSYMLINKS)
948 di_flags |= XFS_DIFLAG_NOSYMLINKS;
949 if (xflags & FS_XFLAG_EXTSZINHERIT)
950 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
951 if (xflags & FS_XFLAG_PROJINHERIT)
952 di_flags |= XFS_DIFLAG_PROJINHERIT;
953 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
954 if (xflags & FS_XFLAG_REALTIME)
955 di_flags |= XFS_DIFLAG_REALTIME;
956 if (xflags & FS_XFLAG_EXTSIZE)
957 di_flags |= XFS_DIFLAG_EXTSIZE;
958 }
959
960 return di_flags;
961 }
962
963 STATIC uint64_t
xfs_flags2diflags2(struct xfs_inode * ip,unsigned int xflags)964 xfs_flags2diflags2(
965 struct xfs_inode *ip,
966 unsigned int xflags)
967 {
968 uint64_t di_flags2 =
969 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
970
971 if (xflags & FS_XFLAG_DAX)
972 di_flags2 |= XFS_DIFLAG2_DAX;
973 if (xflags & FS_XFLAG_COWEXTSIZE)
974 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
975
976 return di_flags2;
977 }
978
979 STATIC void
xfs_diflags_to_linux(struct xfs_inode * ip)980 xfs_diflags_to_linux(
981 struct xfs_inode *ip)
982 {
983 struct inode *inode = VFS_I(ip);
984 unsigned int xflags = xfs_ip2xflags(ip);
985
986 if (xflags & FS_XFLAG_IMMUTABLE)
987 inode->i_flags |= S_IMMUTABLE;
988 else
989 inode->i_flags &= ~S_IMMUTABLE;
990 if (xflags & FS_XFLAG_APPEND)
991 inode->i_flags |= S_APPEND;
992 else
993 inode->i_flags &= ~S_APPEND;
994 if (xflags & FS_XFLAG_SYNC)
995 inode->i_flags |= S_SYNC;
996 else
997 inode->i_flags &= ~S_SYNC;
998 if (xflags & FS_XFLAG_NOATIME)
999 inode->i_flags |= S_NOATIME;
1000 else
1001 inode->i_flags &= ~S_NOATIME;
1002 #if 0 /* disabled until the flag switching races are sorted out */
1003 if (xflags & FS_XFLAG_DAX)
1004 inode->i_flags |= S_DAX;
1005 else
1006 inode->i_flags &= ~S_DAX;
1007 #endif
1008 }
1009
1010 static int
xfs_ioctl_setattr_xflags(struct xfs_trans * tp,struct xfs_inode * ip,struct fsxattr * fa)1011 xfs_ioctl_setattr_xflags(
1012 struct xfs_trans *tp,
1013 struct xfs_inode *ip,
1014 struct fsxattr *fa)
1015 {
1016 struct xfs_mount *mp = ip->i_mount;
1017 uint64_t di_flags2;
1018
1019 /* Can't change realtime flag if any extents are allocated. */
1020 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1021 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1022 return -EINVAL;
1023
1024 /* If realtime flag is set then must have realtime device */
1025 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1026 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1027 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1028 return -EINVAL;
1029 }
1030
1031 /* Clear reflink if we are actually able to set the rt flag. */
1032 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1033 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1034
1035 /* Don't allow us to set DAX mode for a reflinked file for now. */
1036 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1037 return -EINVAL;
1038
1039 /*
1040 * Can't modify an immutable/append-only file unless
1041 * we have appropriate permission.
1042 */
1043 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1044 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1045 !capable(CAP_LINUX_IMMUTABLE))
1046 return -EPERM;
1047
1048 /* diflags2 only valid for v3 inodes. */
1049 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1050 if (di_flags2 && ip->i_d.di_version < 3)
1051 return -EINVAL;
1052
1053 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1054 ip->i_d.di_flags2 = di_flags2;
1055
1056 xfs_diflags_to_linux(ip);
1057 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1058 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1059 XFS_STATS_INC(mp, xs_ig_attrchg);
1060 return 0;
1061 }
1062
1063 /*
1064 * If we are changing DAX flags, we have to ensure the file is clean and any
1065 * cached objects in the address space are invalidated and removed. This
1066 * requires us to lock out other IO and page faults similar to a truncate
1067 * operation. The locks need to be held until the transaction has been committed
1068 * so that the cache invalidation is atomic with respect to the DAX flag
1069 * manipulation.
1070 */
1071 static int
xfs_ioctl_setattr_dax_invalidate(struct xfs_inode * ip,struct fsxattr * fa,int * join_flags)1072 xfs_ioctl_setattr_dax_invalidate(
1073 struct xfs_inode *ip,
1074 struct fsxattr *fa,
1075 int *join_flags)
1076 {
1077 struct inode *inode = VFS_I(ip);
1078 struct super_block *sb = inode->i_sb;
1079 int error;
1080
1081 *join_flags = 0;
1082
1083 /*
1084 * It is only valid to set the DAX flag on regular files and
1085 * directories on filesystems where the block size is equal to the page
1086 * size. On directories it serves as an inherited hint so we don't
1087 * have to check the device for dax support or flush pagecache.
1088 */
1089 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1090 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1091 return -EINVAL;
1092 if (S_ISREG(inode->i_mode) &&
1093 !bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)),
1094 sb->s_blocksize))
1095 return -EINVAL;
1096 }
1097
1098 /* If the DAX state is not changing, we have nothing to do here. */
1099 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1100 return 0;
1101 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1102 return 0;
1103
1104 if (S_ISDIR(inode->i_mode))
1105 return 0;
1106
1107 /* lock, flush and invalidate mapping in preparation for flag change */
1108 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1109 error = filemap_write_and_wait(inode->i_mapping);
1110 if (error)
1111 goto out_unlock;
1112 error = invalidate_inode_pages2(inode->i_mapping);
1113 if (error)
1114 goto out_unlock;
1115
1116 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1117 return 0;
1118
1119 out_unlock:
1120 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1121 return error;
1122
1123 }
1124
1125 /*
1126 * Set up the transaction structure for the setattr operation, checking that we
1127 * have permission to do so. On success, return a clean transaction and the
1128 * inode locked exclusively ready for further operation specific checks. On
1129 * failure, return an error without modifying or locking the inode.
1130 *
1131 * The inode might already be IO locked on call. If this is the case, it is
1132 * indicated in @join_flags and we take full responsibility for ensuring they
1133 * are unlocked from now on. Hence if we have an error here, we still have to
1134 * unlock them. Otherwise, once they are joined to the transaction, they will
1135 * be unlocked on commit/cancel.
1136 */
1137 static struct xfs_trans *
xfs_ioctl_setattr_get_trans(struct xfs_inode * ip,int join_flags)1138 xfs_ioctl_setattr_get_trans(
1139 struct xfs_inode *ip,
1140 int join_flags)
1141 {
1142 struct xfs_mount *mp = ip->i_mount;
1143 struct xfs_trans *tp;
1144 int error = -EROFS;
1145
1146 if (mp->m_flags & XFS_MOUNT_RDONLY)
1147 goto out_unlock;
1148 error = -EIO;
1149 if (XFS_FORCED_SHUTDOWN(mp))
1150 goto out_unlock;
1151
1152 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1153 if (error)
1154 return ERR_PTR(error);
1155
1156 xfs_ilock(ip, XFS_ILOCK_EXCL);
1157 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1158 join_flags = 0;
1159
1160 /*
1161 * CAP_FOWNER overrides the following restrictions:
1162 *
1163 * The user ID of the calling process must be equal to the file owner
1164 * ID, except in cases where the CAP_FSETID capability is applicable.
1165 */
1166 if (!inode_owner_or_capable(VFS_I(ip))) {
1167 error = -EPERM;
1168 goto out_cancel;
1169 }
1170
1171 if (mp->m_flags & XFS_MOUNT_WSYNC)
1172 xfs_trans_set_sync(tp);
1173
1174 return tp;
1175
1176 out_cancel:
1177 xfs_trans_cancel(tp);
1178 out_unlock:
1179 if (join_flags)
1180 xfs_iunlock(ip, join_flags);
1181 return ERR_PTR(error);
1182 }
1183
1184 /*
1185 * extent size hint validation is somewhat cumbersome. Rules are:
1186 *
1187 * 1. extent size hint is only valid for directories and regular files
1188 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1189 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1190 * 4. can only be changed on regular files if no extents are allocated
1191 * 5. can be changed on directories at any time
1192 * 6. extsize hint of 0 turns off hints, clears inode flags.
1193 * 7. Extent size must be a multiple of the appropriate block size.
1194 * 8. for non-realtime files, the extent size hint must be limited
1195 * to half the AG size to avoid alignment extending the extent beyond the
1196 * limits of the AG.
1197 *
1198 * Please keep this function in sync with xfs_scrub_inode_extsize.
1199 */
1200 static int
xfs_ioctl_setattr_check_extsize(struct xfs_inode * ip,struct fsxattr * fa)1201 xfs_ioctl_setattr_check_extsize(
1202 struct xfs_inode *ip,
1203 struct fsxattr *fa)
1204 {
1205 struct xfs_mount *mp = ip->i_mount;
1206
1207 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1208 return -EINVAL;
1209
1210 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1211 !S_ISDIR(VFS_I(ip)->i_mode))
1212 return -EINVAL;
1213
1214 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1215 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1216 return -EINVAL;
1217
1218 if (fa->fsx_extsize != 0) {
1219 xfs_extlen_t size;
1220 xfs_fsblock_t extsize_fsb;
1221
1222 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1223 if (extsize_fsb > MAXEXTLEN)
1224 return -EINVAL;
1225
1226 if (XFS_IS_REALTIME_INODE(ip) ||
1227 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1228 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1229 } else {
1230 size = mp->m_sb.sb_blocksize;
1231 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1232 return -EINVAL;
1233 }
1234
1235 if (fa->fsx_extsize % size)
1236 return -EINVAL;
1237 } else
1238 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1239
1240 return 0;
1241 }
1242
1243 /*
1244 * CoW extent size hint validation rules are:
1245 *
1246 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1247 * The inode does not have to have any shared blocks, but it must be a v3.
1248 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1249 * for a directory, the hint is propagated to new files.
1250 * 3. Can be changed on files & directories at any time.
1251 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1252 * 5. Extent size must be a multiple of the appropriate block size.
1253 * 6. The extent size hint must be limited to half the AG size to avoid
1254 * alignment extending the extent beyond the limits of the AG.
1255 *
1256 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1257 */
1258 static int
xfs_ioctl_setattr_check_cowextsize(struct xfs_inode * ip,struct fsxattr * fa)1259 xfs_ioctl_setattr_check_cowextsize(
1260 struct xfs_inode *ip,
1261 struct fsxattr *fa)
1262 {
1263 struct xfs_mount *mp = ip->i_mount;
1264
1265 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1266 return 0;
1267
1268 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1269 ip->i_d.di_version != 3)
1270 return -EINVAL;
1271
1272 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1273 return -EINVAL;
1274
1275 if (fa->fsx_cowextsize != 0) {
1276 xfs_extlen_t size;
1277 xfs_fsblock_t cowextsize_fsb;
1278
1279 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1280 if (cowextsize_fsb > MAXEXTLEN)
1281 return -EINVAL;
1282
1283 size = mp->m_sb.sb_blocksize;
1284 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1285 return -EINVAL;
1286
1287 if (fa->fsx_cowextsize % size)
1288 return -EINVAL;
1289 } else
1290 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1291
1292 return 0;
1293 }
1294
1295 static int
xfs_ioctl_setattr_check_projid(struct xfs_inode * ip,struct fsxattr * fa)1296 xfs_ioctl_setattr_check_projid(
1297 struct xfs_inode *ip,
1298 struct fsxattr *fa)
1299 {
1300 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1301 if (fa->fsx_projid > (uint16_t)-1 &&
1302 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1303 return -EINVAL;
1304
1305 /*
1306 * Project Quota ID state is only allowed to change from within the init
1307 * namespace. Enforce that restriction only if we are trying to change
1308 * the quota ID state. Everything else is allowed in user namespaces.
1309 */
1310 if (current_user_ns() == &init_user_ns)
1311 return 0;
1312
1313 if (xfs_get_projid(ip) != fa->fsx_projid)
1314 return -EINVAL;
1315 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1316 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1317 return -EINVAL;
1318
1319 return 0;
1320 }
1321
1322 STATIC int
xfs_ioctl_setattr(xfs_inode_t * ip,struct fsxattr * fa)1323 xfs_ioctl_setattr(
1324 xfs_inode_t *ip,
1325 struct fsxattr *fa)
1326 {
1327 struct xfs_mount *mp = ip->i_mount;
1328 struct xfs_trans *tp;
1329 struct xfs_dquot *udqp = NULL;
1330 struct xfs_dquot *pdqp = NULL;
1331 struct xfs_dquot *olddquot = NULL;
1332 int code;
1333 int join_flags = 0;
1334
1335 trace_xfs_ioctl_setattr(ip);
1336
1337 code = xfs_ioctl_setattr_check_projid(ip, fa);
1338 if (code)
1339 return code;
1340
1341 /*
1342 * If disk quotas is on, we make sure that the dquots do exist on disk,
1343 * before we start any other transactions. Trying to do this later
1344 * is messy. We don't care to take a readlock to look at the ids
1345 * in inode here, because we can't hold it across the trans_reserve.
1346 * If the IDs do change before we take the ilock, we're covered
1347 * because the i_*dquot fields will get updated anyway.
1348 */
1349 if (XFS_IS_QUOTA_ON(mp)) {
1350 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1351 ip->i_d.di_gid, fa->fsx_projid,
1352 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1353 if (code)
1354 return code;
1355 }
1356
1357 /*
1358 * Changing DAX config may require inode locking for mapping
1359 * invalidation. These need to be held all the way to transaction commit
1360 * or cancel time, so need to be passed through to
1361 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1362 * appropriately.
1363 */
1364 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1365 if (code)
1366 goto error_free_dquots;
1367
1368 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1369 if (IS_ERR(tp)) {
1370 code = PTR_ERR(tp);
1371 goto error_free_dquots;
1372 }
1373
1374
1375 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1376 xfs_get_projid(ip) != fa->fsx_projid) {
1377 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1378 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1379 if (code) /* out of quota */
1380 goto error_trans_cancel;
1381 }
1382
1383 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1384 if (code)
1385 goto error_trans_cancel;
1386
1387 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1388 if (code)
1389 goto error_trans_cancel;
1390
1391 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1392 if (code)
1393 goto error_trans_cancel;
1394
1395 /*
1396 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1397 * overrides the following restrictions:
1398 *
1399 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1400 * successful return from chown()
1401 */
1402
1403 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1404 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1405 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1406
1407 /* Change the ownerships and register project quota modifications */
1408 if (xfs_get_projid(ip) != fa->fsx_projid) {
1409 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1410 olddquot = xfs_qm_vop_chown(tp, ip,
1411 &ip->i_pdquot, pdqp);
1412 }
1413 ASSERT(ip->i_d.di_version > 1);
1414 xfs_set_projid(ip, fa->fsx_projid);
1415 }
1416
1417 /*
1418 * Only set the extent size hint if we've already determined that the
1419 * extent size hint should be set on the inode. If no extent size flags
1420 * are set on the inode then unconditionally clear the extent size hint.
1421 */
1422 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1423 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1424 else
1425 ip->i_d.di_extsize = 0;
1426 if (ip->i_d.di_version == 3 &&
1427 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1428 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1429 mp->m_sb.sb_blocklog;
1430 else
1431 ip->i_d.di_cowextsize = 0;
1432
1433 code = xfs_trans_commit(tp);
1434
1435 /*
1436 * Release any dquot(s) the inode had kept before chown.
1437 */
1438 xfs_qm_dqrele(olddquot);
1439 xfs_qm_dqrele(udqp);
1440 xfs_qm_dqrele(pdqp);
1441
1442 return code;
1443
1444 error_trans_cancel:
1445 xfs_trans_cancel(tp);
1446 error_free_dquots:
1447 xfs_qm_dqrele(udqp);
1448 xfs_qm_dqrele(pdqp);
1449 return code;
1450 }
1451
1452 STATIC int
xfs_ioc_fssetxattr(xfs_inode_t * ip,struct file * filp,void __user * arg)1453 xfs_ioc_fssetxattr(
1454 xfs_inode_t *ip,
1455 struct file *filp,
1456 void __user *arg)
1457 {
1458 struct fsxattr fa;
1459 int error;
1460
1461 if (copy_from_user(&fa, arg, sizeof(fa)))
1462 return -EFAULT;
1463
1464 error = mnt_want_write_file(filp);
1465 if (error)
1466 return error;
1467 error = xfs_ioctl_setattr(ip, &fa);
1468 mnt_drop_write_file(filp);
1469 return error;
1470 }
1471
1472 STATIC int
xfs_ioc_getxflags(xfs_inode_t * ip,void __user * arg)1473 xfs_ioc_getxflags(
1474 xfs_inode_t *ip,
1475 void __user *arg)
1476 {
1477 unsigned int flags;
1478
1479 flags = xfs_di2lxflags(ip->i_d.di_flags);
1480 if (copy_to_user(arg, &flags, sizeof(flags)))
1481 return -EFAULT;
1482 return 0;
1483 }
1484
1485 STATIC int
xfs_ioc_setxflags(struct xfs_inode * ip,struct file * filp,void __user * arg)1486 xfs_ioc_setxflags(
1487 struct xfs_inode *ip,
1488 struct file *filp,
1489 void __user *arg)
1490 {
1491 struct xfs_trans *tp;
1492 struct fsxattr fa;
1493 unsigned int flags;
1494 int join_flags = 0;
1495 int error;
1496
1497 if (copy_from_user(&flags, arg, sizeof(flags)))
1498 return -EFAULT;
1499
1500 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1501 FS_NOATIME_FL | FS_NODUMP_FL | \
1502 FS_SYNC_FL))
1503 return -EOPNOTSUPP;
1504
1505 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1506
1507 error = mnt_want_write_file(filp);
1508 if (error)
1509 return error;
1510
1511 /*
1512 * Changing DAX config may require inode locking for mapping
1513 * invalidation. These need to be held all the way to transaction commit
1514 * or cancel time, so need to be passed through to
1515 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1516 * appropriately.
1517 */
1518 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1519 if (error)
1520 goto out_drop_write;
1521
1522 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1523 if (IS_ERR(tp)) {
1524 error = PTR_ERR(tp);
1525 goto out_drop_write;
1526 }
1527
1528 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1529 if (error) {
1530 xfs_trans_cancel(tp);
1531 goto out_drop_write;
1532 }
1533
1534 error = xfs_trans_commit(tp);
1535 out_drop_write:
1536 mnt_drop_write_file(filp);
1537 return error;
1538 }
1539
1540 static bool
xfs_getbmap_format(struct kgetbmap * p,struct getbmapx __user * u,size_t recsize)1541 xfs_getbmap_format(
1542 struct kgetbmap *p,
1543 struct getbmapx __user *u,
1544 size_t recsize)
1545 {
1546 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1547 put_user(p->bmv_block, &u->bmv_block) ||
1548 put_user(p->bmv_length, &u->bmv_length) ||
1549 put_user(0, &u->bmv_count) ||
1550 put_user(0, &u->bmv_entries))
1551 return false;
1552 if (recsize < sizeof(struct getbmapx))
1553 return true;
1554 if (put_user(0, &u->bmv_iflags) ||
1555 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1556 put_user(0, &u->bmv_unused1) ||
1557 put_user(0, &u->bmv_unused2))
1558 return false;
1559 return true;
1560 }
1561
1562 STATIC int
xfs_ioc_getbmap(struct file * file,unsigned int cmd,void __user * arg)1563 xfs_ioc_getbmap(
1564 struct file *file,
1565 unsigned int cmd,
1566 void __user *arg)
1567 {
1568 struct getbmapx bmx = { 0 };
1569 struct kgetbmap *buf;
1570 size_t recsize;
1571 int error, i;
1572
1573 switch (cmd) {
1574 case XFS_IOC_GETBMAPA:
1575 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1576 /*FALLTHRU*/
1577 case XFS_IOC_GETBMAP:
1578 if (file->f_mode & FMODE_NOCMTIME)
1579 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1580 /* struct getbmap is a strict subset of struct getbmapx. */
1581 recsize = sizeof(struct getbmap);
1582 break;
1583 case XFS_IOC_GETBMAPX:
1584 recsize = sizeof(struct getbmapx);
1585 break;
1586 default:
1587 return -EINVAL;
1588 }
1589
1590 if (copy_from_user(&bmx, arg, recsize))
1591 return -EFAULT;
1592
1593 if (bmx.bmv_count < 2)
1594 return -EINVAL;
1595 if (bmx.bmv_count > ULONG_MAX / recsize)
1596 return -ENOMEM;
1597
1598 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1599 if (!buf)
1600 return -ENOMEM;
1601
1602 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1603 if (error)
1604 goto out_free_buf;
1605
1606 error = -EFAULT;
1607 if (copy_to_user(arg, &bmx, recsize))
1608 goto out_free_buf;
1609 arg += recsize;
1610
1611 for (i = 0; i < bmx.bmv_entries; i++) {
1612 if (!xfs_getbmap_format(buf + i, arg, recsize))
1613 goto out_free_buf;
1614 arg += recsize;
1615 }
1616
1617 error = 0;
1618 out_free_buf:
1619 kmem_free(buf);
1620 return error;
1621 }
1622
1623 struct getfsmap_info {
1624 struct xfs_mount *mp;
1625 struct fsmap_head __user *data;
1626 unsigned int idx;
1627 __u32 last_flags;
1628 };
1629
1630 STATIC int
xfs_getfsmap_format(struct xfs_fsmap * xfm,void * priv)1631 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1632 {
1633 struct getfsmap_info *info = priv;
1634 struct fsmap fm;
1635
1636 trace_xfs_getfsmap_mapping(info->mp, xfm);
1637
1638 info->last_flags = xfm->fmr_flags;
1639 xfs_fsmap_from_internal(&fm, xfm);
1640 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1641 sizeof(struct fsmap)))
1642 return -EFAULT;
1643
1644 return 0;
1645 }
1646
1647 STATIC int
xfs_ioc_getfsmap(struct xfs_inode * ip,struct fsmap_head __user * arg)1648 xfs_ioc_getfsmap(
1649 struct xfs_inode *ip,
1650 struct fsmap_head __user *arg)
1651 {
1652 struct getfsmap_info info = { NULL };
1653 struct xfs_fsmap_head xhead = {0};
1654 struct fsmap_head head;
1655 bool aborted = false;
1656 int error;
1657
1658 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1659 return -EFAULT;
1660 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1661 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1662 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1663 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1664 sizeof(head.fmh_keys[1].fmr_reserved)))
1665 return -EINVAL;
1666
1667 xhead.fmh_iflags = head.fmh_iflags;
1668 xhead.fmh_count = head.fmh_count;
1669 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1670 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1671
1672 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1673 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1674
1675 info.mp = ip->i_mount;
1676 info.data = arg;
1677 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1678 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1679 error = 0;
1680 aborted = true;
1681 } else if (error)
1682 return error;
1683
1684 /* If we didn't abort, set the "last" flag in the last fmx */
1685 if (!aborted && info.idx) {
1686 info.last_flags |= FMR_OF_LAST;
1687 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1688 &info.last_flags, sizeof(info.last_flags)))
1689 return -EFAULT;
1690 }
1691
1692 /* copy back header */
1693 head.fmh_entries = xhead.fmh_entries;
1694 head.fmh_oflags = xhead.fmh_oflags;
1695 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1696 return -EFAULT;
1697
1698 return 0;
1699 }
1700
1701 STATIC int
xfs_ioc_scrub_metadata(struct xfs_inode * ip,void __user * arg)1702 xfs_ioc_scrub_metadata(
1703 struct xfs_inode *ip,
1704 void __user *arg)
1705 {
1706 struct xfs_scrub_metadata scrub;
1707 int error;
1708
1709 if (!capable(CAP_SYS_ADMIN))
1710 return -EPERM;
1711
1712 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1713 return -EFAULT;
1714
1715 error = xfs_scrub_metadata(ip, &scrub);
1716 if (error)
1717 return error;
1718
1719 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1720 return -EFAULT;
1721
1722 return 0;
1723 }
1724
1725 int
xfs_ioc_swapext(xfs_swapext_t * sxp)1726 xfs_ioc_swapext(
1727 xfs_swapext_t *sxp)
1728 {
1729 xfs_inode_t *ip, *tip;
1730 struct fd f, tmp;
1731 int error = 0;
1732
1733 /* Pull information for the target fd */
1734 f = fdget((int)sxp->sx_fdtarget);
1735 if (!f.file) {
1736 error = -EINVAL;
1737 goto out;
1738 }
1739
1740 if (!(f.file->f_mode & FMODE_WRITE) ||
1741 !(f.file->f_mode & FMODE_READ) ||
1742 (f.file->f_flags & O_APPEND)) {
1743 error = -EBADF;
1744 goto out_put_file;
1745 }
1746
1747 tmp = fdget((int)sxp->sx_fdtmp);
1748 if (!tmp.file) {
1749 error = -EINVAL;
1750 goto out_put_file;
1751 }
1752
1753 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1754 !(tmp.file->f_mode & FMODE_READ) ||
1755 (tmp.file->f_flags & O_APPEND)) {
1756 error = -EBADF;
1757 goto out_put_tmp_file;
1758 }
1759
1760 if (IS_SWAPFILE(file_inode(f.file)) ||
1761 IS_SWAPFILE(file_inode(tmp.file))) {
1762 error = -EINVAL;
1763 goto out_put_tmp_file;
1764 }
1765
1766 /*
1767 * We need to ensure that the fds passed in point to XFS inodes
1768 * before we cast and access them as XFS structures as we have no
1769 * control over what the user passes us here.
1770 */
1771 if (f.file->f_op != &xfs_file_operations ||
1772 tmp.file->f_op != &xfs_file_operations) {
1773 error = -EINVAL;
1774 goto out_put_tmp_file;
1775 }
1776
1777 ip = XFS_I(file_inode(f.file));
1778 tip = XFS_I(file_inode(tmp.file));
1779
1780 if (ip->i_mount != tip->i_mount) {
1781 error = -EINVAL;
1782 goto out_put_tmp_file;
1783 }
1784
1785 if (ip->i_ino == tip->i_ino) {
1786 error = -EINVAL;
1787 goto out_put_tmp_file;
1788 }
1789
1790 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1791 error = -EIO;
1792 goto out_put_tmp_file;
1793 }
1794
1795 error = xfs_swap_extents(ip, tip, sxp);
1796
1797 out_put_tmp_file:
1798 fdput(tmp);
1799 out_put_file:
1800 fdput(f);
1801 out:
1802 return error;
1803 }
1804
1805 static int
xfs_ioc_getlabel(struct xfs_mount * mp,char __user * user_label)1806 xfs_ioc_getlabel(
1807 struct xfs_mount *mp,
1808 char __user *user_label)
1809 {
1810 struct xfs_sb *sbp = &mp->m_sb;
1811 char label[XFSLABEL_MAX + 1];
1812
1813 /* Paranoia */
1814 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1815
1816 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1817 memset(label, 0, sizeof(label));
1818 spin_lock(&mp->m_sb_lock);
1819 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1820 spin_unlock(&mp->m_sb_lock);
1821
1822 if (copy_to_user(user_label, label, sizeof(label)))
1823 return -EFAULT;
1824 return 0;
1825 }
1826
1827 static int
xfs_ioc_setlabel(struct file * filp,struct xfs_mount * mp,char __user * newlabel)1828 xfs_ioc_setlabel(
1829 struct file *filp,
1830 struct xfs_mount *mp,
1831 char __user *newlabel)
1832 {
1833 struct xfs_sb *sbp = &mp->m_sb;
1834 char label[XFSLABEL_MAX + 1];
1835 size_t len;
1836 int error;
1837
1838 if (!capable(CAP_SYS_ADMIN))
1839 return -EPERM;
1840 /*
1841 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1842 * smaller, at 12 bytes. We copy one more to be sure we find the
1843 * (required) NULL character to test the incoming label length.
1844 * NB: The on disk label doesn't need to be null terminated.
1845 */
1846 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1847 return -EFAULT;
1848 len = strnlen(label, XFSLABEL_MAX + 1);
1849 if (len > sizeof(sbp->sb_fname))
1850 return -EINVAL;
1851
1852 error = mnt_want_write_file(filp);
1853 if (error)
1854 return error;
1855
1856 spin_lock(&mp->m_sb_lock);
1857 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1858 memcpy(sbp->sb_fname, label, len);
1859 spin_unlock(&mp->m_sb_lock);
1860
1861 /*
1862 * Now we do several things to satisfy userspace.
1863 * In addition to normal logging of the primary superblock, we also
1864 * immediately write these changes to sector zero for the primary, then
1865 * update all backup supers (as xfs_db does for a label change), then
1866 * invalidate the block device page cache. This is so that any prior
1867 * buffered reads from userspace (i.e. from blkid) are invalidated,
1868 * and userspace will see the newly-written label.
1869 */
1870 error = xfs_sync_sb_buf(mp);
1871 if (error)
1872 goto out;
1873 /*
1874 * growfs also updates backup supers so lock against that.
1875 */
1876 mutex_lock(&mp->m_growlock);
1877 error = xfs_update_secondary_sbs(mp);
1878 mutex_unlock(&mp->m_growlock);
1879
1880 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1881
1882 out:
1883 mnt_drop_write_file(filp);
1884 return error;
1885 }
1886
1887 /*
1888 * Note: some of the ioctl's return positive numbers as a
1889 * byte count indicating success, such as readlink_by_handle.
1890 * So we don't "sign flip" like most other routines. This means
1891 * true errors need to be returned as a negative value.
1892 */
1893 long
xfs_file_ioctl(struct file * filp,unsigned int cmd,unsigned long p)1894 xfs_file_ioctl(
1895 struct file *filp,
1896 unsigned int cmd,
1897 unsigned long p)
1898 {
1899 struct inode *inode = file_inode(filp);
1900 struct xfs_inode *ip = XFS_I(inode);
1901 struct xfs_mount *mp = ip->i_mount;
1902 void __user *arg = (void __user *)p;
1903 int error;
1904
1905 trace_xfs_file_ioctl(ip);
1906
1907 switch (cmd) {
1908 case FITRIM:
1909 return xfs_ioc_trim(mp, arg);
1910 case FS_IOC_GETFSLABEL:
1911 return xfs_ioc_getlabel(mp, arg);
1912 case FS_IOC_SETFSLABEL:
1913 return xfs_ioc_setlabel(filp, mp, arg);
1914 case XFS_IOC_ALLOCSP:
1915 case XFS_IOC_FREESP:
1916 case XFS_IOC_RESVSP:
1917 case XFS_IOC_UNRESVSP:
1918 case XFS_IOC_ALLOCSP64:
1919 case XFS_IOC_FREESP64:
1920 case XFS_IOC_RESVSP64:
1921 case XFS_IOC_UNRESVSP64:
1922 case XFS_IOC_ZERO_RANGE: {
1923 xfs_flock64_t bf;
1924
1925 if (copy_from_user(&bf, arg, sizeof(bf)))
1926 return -EFAULT;
1927 return xfs_ioc_space(filp, cmd, &bf);
1928 }
1929 case XFS_IOC_DIOINFO: {
1930 struct dioattr da;
1931 xfs_buftarg_t *target =
1932 XFS_IS_REALTIME_INODE(ip) ?
1933 mp->m_rtdev_targp : mp->m_ddev_targp;
1934
1935 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1936 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1937
1938 if (copy_to_user(arg, &da, sizeof(da)))
1939 return -EFAULT;
1940 return 0;
1941 }
1942
1943 case XFS_IOC_FSBULKSTAT_SINGLE:
1944 case XFS_IOC_FSBULKSTAT:
1945 case XFS_IOC_FSINUMBERS:
1946 return xfs_ioc_bulkstat(mp, cmd, arg);
1947
1948 case XFS_IOC_FSGEOMETRY_V1:
1949 return xfs_ioc_fsgeometry_v1(mp, arg);
1950
1951 case XFS_IOC_FSGEOMETRY:
1952 return xfs_ioc_fsgeometry(mp, arg);
1953
1954 case XFS_IOC_GETVERSION:
1955 return put_user(inode->i_generation, (int __user *)arg);
1956
1957 case XFS_IOC_FSGETXATTR:
1958 return xfs_ioc_fsgetxattr(ip, 0, arg);
1959 case XFS_IOC_FSGETXATTRA:
1960 return xfs_ioc_fsgetxattr(ip, 1, arg);
1961 case XFS_IOC_FSSETXATTR:
1962 return xfs_ioc_fssetxattr(ip, filp, arg);
1963 case XFS_IOC_GETXFLAGS:
1964 return xfs_ioc_getxflags(ip, arg);
1965 case XFS_IOC_SETXFLAGS:
1966 return xfs_ioc_setxflags(ip, filp, arg);
1967
1968 case XFS_IOC_FSSETDM: {
1969 struct fsdmidata dmi;
1970
1971 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1972 return -EFAULT;
1973
1974 error = mnt_want_write_file(filp);
1975 if (error)
1976 return error;
1977
1978 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1979 dmi.fsd_dmstate);
1980 mnt_drop_write_file(filp);
1981 return error;
1982 }
1983
1984 case XFS_IOC_GETBMAP:
1985 case XFS_IOC_GETBMAPA:
1986 case XFS_IOC_GETBMAPX:
1987 return xfs_ioc_getbmap(filp, cmd, arg);
1988
1989 case FS_IOC_GETFSMAP:
1990 return xfs_ioc_getfsmap(ip, arg);
1991
1992 case XFS_IOC_SCRUB_METADATA:
1993 return xfs_ioc_scrub_metadata(ip, arg);
1994
1995 case XFS_IOC_FD_TO_HANDLE:
1996 case XFS_IOC_PATH_TO_HANDLE:
1997 case XFS_IOC_PATH_TO_FSHANDLE: {
1998 xfs_fsop_handlereq_t hreq;
1999
2000 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2001 return -EFAULT;
2002 return xfs_find_handle(cmd, &hreq);
2003 }
2004 case XFS_IOC_OPEN_BY_HANDLE: {
2005 xfs_fsop_handlereq_t hreq;
2006
2007 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2008 return -EFAULT;
2009 return xfs_open_by_handle(filp, &hreq);
2010 }
2011 case XFS_IOC_FSSETDM_BY_HANDLE:
2012 return xfs_fssetdm_by_handle(filp, arg);
2013
2014 case XFS_IOC_READLINK_BY_HANDLE: {
2015 xfs_fsop_handlereq_t hreq;
2016
2017 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2018 return -EFAULT;
2019 return xfs_readlink_by_handle(filp, &hreq);
2020 }
2021 case XFS_IOC_ATTRLIST_BY_HANDLE:
2022 return xfs_attrlist_by_handle(filp, arg);
2023
2024 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2025 return xfs_attrmulti_by_handle(filp, arg);
2026
2027 case XFS_IOC_SWAPEXT: {
2028 struct xfs_swapext sxp;
2029
2030 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2031 return -EFAULT;
2032 error = mnt_want_write_file(filp);
2033 if (error)
2034 return error;
2035 error = xfs_ioc_swapext(&sxp);
2036 mnt_drop_write_file(filp);
2037 return error;
2038 }
2039
2040 case XFS_IOC_FSCOUNTS: {
2041 xfs_fsop_counts_t out;
2042
2043 error = xfs_fs_counts(mp, &out);
2044 if (error)
2045 return error;
2046
2047 if (copy_to_user(arg, &out, sizeof(out)))
2048 return -EFAULT;
2049 return 0;
2050 }
2051
2052 case XFS_IOC_SET_RESBLKS: {
2053 xfs_fsop_resblks_t inout;
2054 uint64_t in;
2055
2056 if (!capable(CAP_SYS_ADMIN))
2057 return -EPERM;
2058
2059 if (mp->m_flags & XFS_MOUNT_RDONLY)
2060 return -EROFS;
2061
2062 if (copy_from_user(&inout, arg, sizeof(inout)))
2063 return -EFAULT;
2064
2065 error = mnt_want_write_file(filp);
2066 if (error)
2067 return error;
2068
2069 /* input parameter is passed in resblks field of structure */
2070 in = inout.resblks;
2071 error = xfs_reserve_blocks(mp, &in, &inout);
2072 mnt_drop_write_file(filp);
2073 if (error)
2074 return error;
2075
2076 if (copy_to_user(arg, &inout, sizeof(inout)))
2077 return -EFAULT;
2078 return 0;
2079 }
2080
2081 case XFS_IOC_GET_RESBLKS: {
2082 xfs_fsop_resblks_t out;
2083
2084 if (!capable(CAP_SYS_ADMIN))
2085 return -EPERM;
2086
2087 error = xfs_reserve_blocks(mp, NULL, &out);
2088 if (error)
2089 return error;
2090
2091 if (copy_to_user(arg, &out, sizeof(out)))
2092 return -EFAULT;
2093
2094 return 0;
2095 }
2096
2097 case XFS_IOC_FSGROWFSDATA: {
2098 xfs_growfs_data_t in;
2099
2100 if (copy_from_user(&in, arg, sizeof(in)))
2101 return -EFAULT;
2102
2103 error = mnt_want_write_file(filp);
2104 if (error)
2105 return error;
2106 error = xfs_growfs_data(mp, &in);
2107 mnt_drop_write_file(filp);
2108 return error;
2109 }
2110
2111 case XFS_IOC_FSGROWFSLOG: {
2112 xfs_growfs_log_t in;
2113
2114 if (copy_from_user(&in, arg, sizeof(in)))
2115 return -EFAULT;
2116
2117 error = mnt_want_write_file(filp);
2118 if (error)
2119 return error;
2120 error = xfs_growfs_log(mp, &in);
2121 mnt_drop_write_file(filp);
2122 return error;
2123 }
2124
2125 case XFS_IOC_FSGROWFSRT: {
2126 xfs_growfs_rt_t in;
2127
2128 if (copy_from_user(&in, arg, sizeof(in)))
2129 return -EFAULT;
2130
2131 error = mnt_want_write_file(filp);
2132 if (error)
2133 return error;
2134 error = xfs_growfs_rt(mp, &in);
2135 mnt_drop_write_file(filp);
2136 return error;
2137 }
2138
2139 case XFS_IOC_GOINGDOWN: {
2140 uint32_t in;
2141
2142 if (!capable(CAP_SYS_ADMIN))
2143 return -EPERM;
2144
2145 if (get_user(in, (uint32_t __user *)arg))
2146 return -EFAULT;
2147
2148 return xfs_fs_goingdown(mp, in);
2149 }
2150
2151 case XFS_IOC_ERROR_INJECTION: {
2152 xfs_error_injection_t in;
2153
2154 if (!capable(CAP_SYS_ADMIN))
2155 return -EPERM;
2156
2157 if (copy_from_user(&in, arg, sizeof(in)))
2158 return -EFAULT;
2159
2160 return xfs_errortag_add(mp, in.errtag);
2161 }
2162
2163 case XFS_IOC_ERROR_CLEARALL:
2164 if (!capable(CAP_SYS_ADMIN))
2165 return -EPERM;
2166
2167 return xfs_errortag_clearall(mp);
2168
2169 case XFS_IOC_FREE_EOFBLOCKS: {
2170 struct xfs_fs_eofblocks eofb;
2171 struct xfs_eofblocks keofb;
2172
2173 if (!capable(CAP_SYS_ADMIN))
2174 return -EPERM;
2175
2176 if (mp->m_flags & XFS_MOUNT_RDONLY)
2177 return -EROFS;
2178
2179 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2180 return -EFAULT;
2181
2182 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2183 if (error)
2184 return error;
2185
2186 sb_start_write(mp->m_super);
2187 error = xfs_icache_free_eofblocks(mp, &keofb);
2188 sb_end_write(mp->m_super);
2189 return error;
2190 }
2191
2192 default:
2193 return -ENOTTY;
2194 }
2195 }
2196