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), 0);
705 if (error)
706 goto out_unlock;
707 }
708
709 iattr.ia_valid = ATTR_SIZE;
710 iattr.ia_size = bf->l_start;
711
712 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
713 break;
714 default:
715 ASSERT(0);
716 error = -EINVAL;
717 }
718
719 if (error)
720 goto out_unlock;
721
722 error = xfs_update_prealloc_flags(ip, flags);
723
724 out_unlock:
725 xfs_iunlock(ip, iolock);
726 mnt_drop_write_file(filp);
727 return error;
728 }
729
730 STATIC int
xfs_ioc_bulkstat(xfs_mount_t * mp,unsigned int cmd,void __user * arg)731 xfs_ioc_bulkstat(
732 xfs_mount_t *mp,
733 unsigned int cmd,
734 void __user *arg)
735 {
736 xfs_fsop_bulkreq_t bulkreq;
737 int count; /* # of records returned */
738 xfs_ino_t inlast; /* last inode number */
739 int done;
740 int error;
741
742 /* done = 1 if there are more stats to get and if bulkstat */
743 /* should be called again (unused here, but used in dmapi) */
744
745 if (!capable(CAP_SYS_ADMIN))
746 return -EPERM;
747
748 if (XFS_FORCED_SHUTDOWN(mp))
749 return -EIO;
750
751 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
752 return -EFAULT;
753
754 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
755 return -EFAULT;
756
757 if ((count = bulkreq.icount) <= 0)
758 return -EINVAL;
759
760 if (bulkreq.ubuffer == NULL)
761 return -EINVAL;
762
763 if (cmd == XFS_IOC_FSINUMBERS)
764 error = xfs_inumbers(mp, &inlast, &count,
765 bulkreq.ubuffer, xfs_inumbers_fmt);
766 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
767 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
768 sizeof(xfs_bstat_t), NULL, &done);
769 else /* XFS_IOC_FSBULKSTAT */
770 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
771 sizeof(xfs_bstat_t), bulkreq.ubuffer,
772 &done);
773
774 if (error)
775 return error;
776
777 if (bulkreq.ocount != NULL) {
778 if (copy_to_user(bulkreq.lastip, &inlast,
779 sizeof(xfs_ino_t)))
780 return -EFAULT;
781
782 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
783 return -EFAULT;
784 }
785
786 return 0;
787 }
788
789 STATIC int
xfs_ioc_fsgeometry_v1(xfs_mount_t * mp,void __user * arg)790 xfs_ioc_fsgeometry_v1(
791 xfs_mount_t *mp,
792 void __user *arg)
793 {
794 xfs_fsop_geom_t fsgeo;
795 int error;
796
797 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
798 if (error)
799 return error;
800
801 /*
802 * Caller should have passed an argument of type
803 * xfs_fsop_geom_v1_t. This is a proper subset of the
804 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
805 */
806 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
807 return -EFAULT;
808 return 0;
809 }
810
811 STATIC int
xfs_ioc_fsgeometry(xfs_mount_t * mp,void __user * arg)812 xfs_ioc_fsgeometry(
813 xfs_mount_t *mp,
814 void __user *arg)
815 {
816 xfs_fsop_geom_t fsgeo;
817 int error;
818
819 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 4);
820 if (error)
821 return error;
822
823 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
824 return -EFAULT;
825 return 0;
826 }
827
828 /*
829 * Linux extended inode flags interface.
830 */
831
832 STATIC unsigned int
xfs_merge_ioc_xflags(unsigned int flags,unsigned int start)833 xfs_merge_ioc_xflags(
834 unsigned int flags,
835 unsigned int start)
836 {
837 unsigned int xflags = start;
838
839 if (flags & FS_IMMUTABLE_FL)
840 xflags |= FS_XFLAG_IMMUTABLE;
841 else
842 xflags &= ~FS_XFLAG_IMMUTABLE;
843 if (flags & FS_APPEND_FL)
844 xflags |= FS_XFLAG_APPEND;
845 else
846 xflags &= ~FS_XFLAG_APPEND;
847 if (flags & FS_SYNC_FL)
848 xflags |= FS_XFLAG_SYNC;
849 else
850 xflags &= ~FS_XFLAG_SYNC;
851 if (flags & FS_NOATIME_FL)
852 xflags |= FS_XFLAG_NOATIME;
853 else
854 xflags &= ~FS_XFLAG_NOATIME;
855 if (flags & FS_NODUMP_FL)
856 xflags |= FS_XFLAG_NODUMP;
857 else
858 xflags &= ~FS_XFLAG_NODUMP;
859
860 return xflags;
861 }
862
863 STATIC unsigned int
xfs_di2lxflags(uint16_t di_flags)864 xfs_di2lxflags(
865 uint16_t di_flags)
866 {
867 unsigned int flags = 0;
868
869 if (di_flags & XFS_DIFLAG_IMMUTABLE)
870 flags |= FS_IMMUTABLE_FL;
871 if (di_flags & XFS_DIFLAG_APPEND)
872 flags |= FS_APPEND_FL;
873 if (di_flags & XFS_DIFLAG_SYNC)
874 flags |= FS_SYNC_FL;
875 if (di_flags & XFS_DIFLAG_NOATIME)
876 flags |= FS_NOATIME_FL;
877 if (di_flags & XFS_DIFLAG_NODUMP)
878 flags |= FS_NODUMP_FL;
879 return flags;
880 }
881
882 STATIC int
xfs_ioc_fsgetxattr(xfs_inode_t * ip,int attr,void __user * arg)883 xfs_ioc_fsgetxattr(
884 xfs_inode_t *ip,
885 int attr,
886 void __user *arg)
887 {
888 struct fsxattr fa;
889
890 memset(&fa, 0, sizeof(struct fsxattr));
891
892 xfs_ilock(ip, XFS_ILOCK_SHARED);
893 fa.fsx_xflags = xfs_ip2xflags(ip);
894 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
895 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
896 ip->i_mount->m_sb.sb_blocklog;
897 fa.fsx_projid = xfs_get_projid(ip);
898
899 if (attr) {
900 if (ip->i_afp) {
901 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
902 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
903 else
904 fa.fsx_nextents = ip->i_d.di_anextents;
905 } else
906 fa.fsx_nextents = 0;
907 } else {
908 if (ip->i_df.if_flags & XFS_IFEXTENTS)
909 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
910 else
911 fa.fsx_nextents = ip->i_d.di_nextents;
912 }
913 xfs_iunlock(ip, XFS_ILOCK_SHARED);
914
915 if (copy_to_user(arg, &fa, sizeof(fa)))
916 return -EFAULT;
917 return 0;
918 }
919
920 STATIC uint16_t
xfs_flags2diflags(struct xfs_inode * ip,unsigned int xflags)921 xfs_flags2diflags(
922 struct xfs_inode *ip,
923 unsigned int xflags)
924 {
925 /* can't set PREALLOC this way, just preserve it */
926 uint16_t di_flags =
927 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
928
929 if (xflags & FS_XFLAG_IMMUTABLE)
930 di_flags |= XFS_DIFLAG_IMMUTABLE;
931 if (xflags & FS_XFLAG_APPEND)
932 di_flags |= XFS_DIFLAG_APPEND;
933 if (xflags & FS_XFLAG_SYNC)
934 di_flags |= XFS_DIFLAG_SYNC;
935 if (xflags & FS_XFLAG_NOATIME)
936 di_flags |= XFS_DIFLAG_NOATIME;
937 if (xflags & FS_XFLAG_NODUMP)
938 di_flags |= XFS_DIFLAG_NODUMP;
939 if (xflags & FS_XFLAG_NODEFRAG)
940 di_flags |= XFS_DIFLAG_NODEFRAG;
941 if (xflags & FS_XFLAG_FILESTREAM)
942 di_flags |= XFS_DIFLAG_FILESTREAM;
943 if (S_ISDIR(VFS_I(ip)->i_mode)) {
944 if (xflags & FS_XFLAG_RTINHERIT)
945 di_flags |= XFS_DIFLAG_RTINHERIT;
946 if (xflags & FS_XFLAG_NOSYMLINKS)
947 di_flags |= XFS_DIFLAG_NOSYMLINKS;
948 if (xflags & FS_XFLAG_EXTSZINHERIT)
949 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
950 if (xflags & FS_XFLAG_PROJINHERIT)
951 di_flags |= XFS_DIFLAG_PROJINHERIT;
952 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
953 if (xflags & FS_XFLAG_REALTIME)
954 di_flags |= XFS_DIFLAG_REALTIME;
955 if (xflags & FS_XFLAG_EXTSIZE)
956 di_flags |= XFS_DIFLAG_EXTSIZE;
957 }
958
959 return di_flags;
960 }
961
962 STATIC uint64_t
xfs_flags2diflags2(struct xfs_inode * ip,unsigned int xflags)963 xfs_flags2diflags2(
964 struct xfs_inode *ip,
965 unsigned int xflags)
966 {
967 uint64_t di_flags2 =
968 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
969
970 if (xflags & FS_XFLAG_DAX)
971 di_flags2 |= XFS_DIFLAG2_DAX;
972 if (xflags & FS_XFLAG_COWEXTSIZE)
973 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
974
975 return di_flags2;
976 }
977
978 STATIC void
xfs_diflags_to_linux(struct xfs_inode * ip)979 xfs_diflags_to_linux(
980 struct xfs_inode *ip)
981 {
982 struct inode *inode = VFS_I(ip);
983 unsigned int xflags = xfs_ip2xflags(ip);
984
985 if (xflags & FS_XFLAG_IMMUTABLE)
986 inode->i_flags |= S_IMMUTABLE;
987 else
988 inode->i_flags &= ~S_IMMUTABLE;
989 if (xflags & FS_XFLAG_APPEND)
990 inode->i_flags |= S_APPEND;
991 else
992 inode->i_flags &= ~S_APPEND;
993 if (xflags & FS_XFLAG_SYNC)
994 inode->i_flags |= S_SYNC;
995 else
996 inode->i_flags &= ~S_SYNC;
997 if (xflags & FS_XFLAG_NOATIME)
998 inode->i_flags |= S_NOATIME;
999 else
1000 inode->i_flags &= ~S_NOATIME;
1001 #if 0 /* disabled until the flag switching races are sorted out */
1002 if (xflags & FS_XFLAG_DAX)
1003 inode->i_flags |= S_DAX;
1004 else
1005 inode->i_flags &= ~S_DAX;
1006 #endif
1007 }
1008
1009 static int
xfs_ioctl_setattr_xflags(struct xfs_trans * tp,struct xfs_inode * ip,struct fsxattr * fa)1010 xfs_ioctl_setattr_xflags(
1011 struct xfs_trans *tp,
1012 struct xfs_inode *ip,
1013 struct fsxattr *fa)
1014 {
1015 struct xfs_mount *mp = ip->i_mount;
1016 uint64_t di_flags2;
1017
1018 /* Can't change realtime flag if any extents are allocated. */
1019 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1020 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1021 return -EINVAL;
1022
1023 /* If realtime flag is set then must have realtime device */
1024 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1025 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1026 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1027 return -EINVAL;
1028 }
1029
1030 /* Clear reflink if we are actually able to set the rt flag. */
1031 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1032 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1033
1034 /* Don't allow us to set DAX mode for a reflinked file for now. */
1035 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1036 return -EINVAL;
1037
1038 /*
1039 * Can't modify an immutable/append-only file unless
1040 * we have appropriate permission.
1041 */
1042 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1043 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1044 !capable(CAP_LINUX_IMMUTABLE))
1045 return -EPERM;
1046
1047 /* diflags2 only valid for v3 inodes. */
1048 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1049 if (di_flags2 && ip->i_d.di_version < 3)
1050 return -EINVAL;
1051
1052 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1053 ip->i_d.di_flags2 = di_flags2;
1054
1055 xfs_diflags_to_linux(ip);
1056 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1057 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1058 XFS_STATS_INC(mp, xs_ig_attrchg);
1059 return 0;
1060 }
1061
1062 /*
1063 * If we are changing DAX flags, we have to ensure the file is clean and any
1064 * cached objects in the address space are invalidated and removed. This
1065 * requires us to lock out other IO and page faults similar to a truncate
1066 * operation. The locks need to be held until the transaction has been committed
1067 * so that the cache invalidation is atomic with respect to the DAX flag
1068 * manipulation.
1069 */
1070 static int
xfs_ioctl_setattr_dax_invalidate(struct xfs_inode * ip,struct fsxattr * fa,int * join_flags)1071 xfs_ioctl_setattr_dax_invalidate(
1072 struct xfs_inode *ip,
1073 struct fsxattr *fa,
1074 int *join_flags)
1075 {
1076 struct inode *inode = VFS_I(ip);
1077 struct super_block *sb = inode->i_sb;
1078 int error;
1079
1080 *join_flags = 0;
1081
1082 /*
1083 * It is only valid to set the DAX flag on regular files and
1084 * directories on filesystems where the block size is equal to the page
1085 * size. On directories it serves as an inherited hint so we don't
1086 * have to check the device for dax support or flush pagecache.
1087 */
1088 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1089 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1090 return -EINVAL;
1091 if (S_ISREG(inode->i_mode) &&
1092 !bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)),
1093 sb->s_blocksize))
1094 return -EINVAL;
1095 }
1096
1097 /* If the DAX state is not changing, we have nothing to do here. */
1098 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1099 return 0;
1100 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1101 return 0;
1102
1103 if (S_ISDIR(inode->i_mode))
1104 return 0;
1105
1106 /* lock, flush and invalidate mapping in preparation for flag change */
1107 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1108 error = filemap_write_and_wait(inode->i_mapping);
1109 if (error)
1110 goto out_unlock;
1111 error = invalidate_inode_pages2(inode->i_mapping);
1112 if (error)
1113 goto out_unlock;
1114
1115 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1116 return 0;
1117
1118 out_unlock:
1119 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1120 return error;
1121
1122 }
1123
1124 /*
1125 * Set up the transaction structure for the setattr operation, checking that we
1126 * have permission to do so. On success, return a clean transaction and the
1127 * inode locked exclusively ready for further operation specific checks. On
1128 * failure, return an error without modifying or locking the inode.
1129 *
1130 * The inode might already be IO locked on call. If this is the case, it is
1131 * indicated in @join_flags and we take full responsibility for ensuring they
1132 * are unlocked from now on. Hence if we have an error here, we still have to
1133 * unlock them. Otherwise, once they are joined to the transaction, they will
1134 * be unlocked on commit/cancel.
1135 */
1136 static struct xfs_trans *
xfs_ioctl_setattr_get_trans(struct xfs_inode * ip,int join_flags)1137 xfs_ioctl_setattr_get_trans(
1138 struct xfs_inode *ip,
1139 int join_flags)
1140 {
1141 struct xfs_mount *mp = ip->i_mount;
1142 struct xfs_trans *tp;
1143 int error = -EROFS;
1144
1145 if (mp->m_flags & XFS_MOUNT_RDONLY)
1146 goto out_unlock;
1147 error = -EIO;
1148 if (XFS_FORCED_SHUTDOWN(mp))
1149 goto out_unlock;
1150
1151 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1152 if (error)
1153 return ERR_PTR(error);
1154
1155 xfs_ilock(ip, XFS_ILOCK_EXCL);
1156 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1157 join_flags = 0;
1158
1159 /*
1160 * CAP_FOWNER overrides the following restrictions:
1161 *
1162 * The user ID of the calling process must be equal to the file owner
1163 * ID, except in cases where the CAP_FSETID capability is applicable.
1164 */
1165 if (!inode_owner_or_capable(VFS_I(ip))) {
1166 error = -EPERM;
1167 goto out_cancel;
1168 }
1169
1170 if (mp->m_flags & XFS_MOUNT_WSYNC)
1171 xfs_trans_set_sync(tp);
1172
1173 return tp;
1174
1175 out_cancel:
1176 xfs_trans_cancel(tp);
1177 out_unlock:
1178 if (join_flags)
1179 xfs_iunlock(ip, join_flags);
1180 return ERR_PTR(error);
1181 }
1182
1183 /*
1184 * extent size hint validation is somewhat cumbersome. Rules are:
1185 *
1186 * 1. extent size hint is only valid for directories and regular files
1187 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1188 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1189 * 4. can only be changed on regular files if no extents are allocated
1190 * 5. can be changed on directories at any time
1191 * 6. extsize hint of 0 turns off hints, clears inode flags.
1192 * 7. Extent size must be a multiple of the appropriate block size.
1193 * 8. for non-realtime files, the extent size hint must be limited
1194 * to half the AG size to avoid alignment extending the extent beyond the
1195 * limits of the AG.
1196 *
1197 * Please keep this function in sync with xfs_scrub_inode_extsize.
1198 */
1199 static int
xfs_ioctl_setattr_check_extsize(struct xfs_inode * ip,struct fsxattr * fa)1200 xfs_ioctl_setattr_check_extsize(
1201 struct xfs_inode *ip,
1202 struct fsxattr *fa)
1203 {
1204 struct xfs_mount *mp = ip->i_mount;
1205
1206 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1207 return -EINVAL;
1208
1209 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1210 !S_ISDIR(VFS_I(ip)->i_mode))
1211 return -EINVAL;
1212
1213 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1214 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1215 return -EINVAL;
1216
1217 if (fa->fsx_extsize != 0) {
1218 xfs_extlen_t size;
1219 xfs_fsblock_t extsize_fsb;
1220
1221 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1222 if (extsize_fsb > MAXEXTLEN)
1223 return -EINVAL;
1224
1225 if (XFS_IS_REALTIME_INODE(ip) ||
1226 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1227 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1228 } else {
1229 size = mp->m_sb.sb_blocksize;
1230 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1231 return -EINVAL;
1232 }
1233
1234 if (fa->fsx_extsize % size)
1235 return -EINVAL;
1236 } else
1237 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1238
1239 return 0;
1240 }
1241
1242 /*
1243 * CoW extent size hint validation rules are:
1244 *
1245 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1246 * The inode does not have to have any shared blocks, but it must be a v3.
1247 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1248 * for a directory, the hint is propagated to new files.
1249 * 3. Can be changed on files & directories at any time.
1250 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1251 * 5. Extent size must be a multiple of the appropriate block size.
1252 * 6. The extent size hint must be limited to half the AG size to avoid
1253 * alignment extending the extent beyond the limits of the AG.
1254 *
1255 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1256 */
1257 static int
xfs_ioctl_setattr_check_cowextsize(struct xfs_inode * ip,struct fsxattr * fa)1258 xfs_ioctl_setattr_check_cowextsize(
1259 struct xfs_inode *ip,
1260 struct fsxattr *fa)
1261 {
1262 struct xfs_mount *mp = ip->i_mount;
1263
1264 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1265 return 0;
1266
1267 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1268 ip->i_d.di_version != 3)
1269 return -EINVAL;
1270
1271 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1272 return -EINVAL;
1273
1274 if (fa->fsx_cowextsize != 0) {
1275 xfs_extlen_t size;
1276 xfs_fsblock_t cowextsize_fsb;
1277
1278 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1279 if (cowextsize_fsb > MAXEXTLEN)
1280 return -EINVAL;
1281
1282 size = mp->m_sb.sb_blocksize;
1283 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1284 return -EINVAL;
1285
1286 if (fa->fsx_cowextsize % size)
1287 return -EINVAL;
1288 } else
1289 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1290
1291 return 0;
1292 }
1293
1294 static int
xfs_ioctl_setattr_check_projid(struct xfs_inode * ip,struct fsxattr * fa)1295 xfs_ioctl_setattr_check_projid(
1296 struct xfs_inode *ip,
1297 struct fsxattr *fa)
1298 {
1299 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1300 if (fa->fsx_projid > (uint16_t)-1 &&
1301 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1302 return -EINVAL;
1303
1304 /*
1305 * Project Quota ID state is only allowed to change from within the init
1306 * namespace. Enforce that restriction only if we are trying to change
1307 * the quota ID state. Everything else is allowed in user namespaces.
1308 */
1309 if (current_user_ns() == &init_user_ns)
1310 return 0;
1311
1312 if (xfs_get_projid(ip) != fa->fsx_projid)
1313 return -EINVAL;
1314 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1315 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1316 return -EINVAL;
1317
1318 return 0;
1319 }
1320
1321 STATIC int
xfs_ioctl_setattr(xfs_inode_t * ip,struct fsxattr * fa)1322 xfs_ioctl_setattr(
1323 xfs_inode_t *ip,
1324 struct fsxattr *fa)
1325 {
1326 struct xfs_mount *mp = ip->i_mount;
1327 struct xfs_trans *tp;
1328 struct xfs_dquot *udqp = NULL;
1329 struct xfs_dquot *pdqp = NULL;
1330 struct xfs_dquot *olddquot = NULL;
1331 int code;
1332 int join_flags = 0;
1333
1334 trace_xfs_ioctl_setattr(ip);
1335
1336 code = xfs_ioctl_setattr_check_projid(ip, fa);
1337 if (code)
1338 return code;
1339
1340 /*
1341 * If disk quotas is on, we make sure that the dquots do exist on disk,
1342 * before we start any other transactions. Trying to do this later
1343 * is messy. We don't care to take a readlock to look at the ids
1344 * in inode here, because we can't hold it across the trans_reserve.
1345 * If the IDs do change before we take the ilock, we're covered
1346 * because the i_*dquot fields will get updated anyway.
1347 */
1348 if (XFS_IS_QUOTA_ON(mp)) {
1349 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1350 ip->i_d.di_gid, fa->fsx_projid,
1351 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1352 if (code)
1353 return code;
1354 }
1355
1356 /*
1357 * Changing DAX config may require inode locking for mapping
1358 * invalidation. These need to be held all the way to transaction commit
1359 * or cancel time, so need to be passed through to
1360 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1361 * appropriately.
1362 */
1363 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1364 if (code)
1365 goto error_free_dquots;
1366
1367 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1368 if (IS_ERR(tp)) {
1369 code = PTR_ERR(tp);
1370 goto error_free_dquots;
1371 }
1372
1373
1374 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1375 xfs_get_projid(ip) != fa->fsx_projid) {
1376 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1377 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1378 if (code) /* out of quota */
1379 goto error_trans_cancel;
1380 }
1381
1382 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1383 if (code)
1384 goto error_trans_cancel;
1385
1386 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1387 if (code)
1388 goto error_trans_cancel;
1389
1390 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1391 if (code)
1392 goto error_trans_cancel;
1393
1394 /*
1395 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1396 * overrides the following restrictions:
1397 *
1398 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1399 * successful return from chown()
1400 */
1401
1402 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1403 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1404 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1405
1406 /* Change the ownerships and register project quota modifications */
1407 if (xfs_get_projid(ip) != fa->fsx_projid) {
1408 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1409 olddquot = xfs_qm_vop_chown(tp, ip,
1410 &ip->i_pdquot, pdqp);
1411 }
1412 ASSERT(ip->i_d.di_version > 1);
1413 xfs_set_projid(ip, fa->fsx_projid);
1414 }
1415
1416 /*
1417 * Only set the extent size hint if we've already determined that the
1418 * extent size hint should be set on the inode. If no extent size flags
1419 * are set on the inode then unconditionally clear the extent size hint.
1420 */
1421 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1422 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1423 else
1424 ip->i_d.di_extsize = 0;
1425 if (ip->i_d.di_version == 3 &&
1426 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1427 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1428 mp->m_sb.sb_blocklog;
1429 else
1430 ip->i_d.di_cowextsize = 0;
1431
1432 code = xfs_trans_commit(tp);
1433
1434 /*
1435 * Release any dquot(s) the inode had kept before chown.
1436 */
1437 xfs_qm_dqrele(olddquot);
1438 xfs_qm_dqrele(udqp);
1439 xfs_qm_dqrele(pdqp);
1440
1441 return code;
1442
1443 error_trans_cancel:
1444 xfs_trans_cancel(tp);
1445 error_free_dquots:
1446 xfs_qm_dqrele(udqp);
1447 xfs_qm_dqrele(pdqp);
1448 return code;
1449 }
1450
1451 STATIC int
xfs_ioc_fssetxattr(xfs_inode_t * ip,struct file * filp,void __user * arg)1452 xfs_ioc_fssetxattr(
1453 xfs_inode_t *ip,
1454 struct file *filp,
1455 void __user *arg)
1456 {
1457 struct fsxattr fa;
1458 int error;
1459
1460 if (copy_from_user(&fa, arg, sizeof(fa)))
1461 return -EFAULT;
1462
1463 error = mnt_want_write_file(filp);
1464 if (error)
1465 return error;
1466 error = xfs_ioctl_setattr(ip, &fa);
1467 mnt_drop_write_file(filp);
1468 return error;
1469 }
1470
1471 STATIC int
xfs_ioc_getxflags(xfs_inode_t * ip,void __user * arg)1472 xfs_ioc_getxflags(
1473 xfs_inode_t *ip,
1474 void __user *arg)
1475 {
1476 unsigned int flags;
1477
1478 flags = xfs_di2lxflags(ip->i_d.di_flags);
1479 if (copy_to_user(arg, &flags, sizeof(flags)))
1480 return -EFAULT;
1481 return 0;
1482 }
1483
1484 STATIC int
xfs_ioc_setxflags(struct xfs_inode * ip,struct file * filp,void __user * arg)1485 xfs_ioc_setxflags(
1486 struct xfs_inode *ip,
1487 struct file *filp,
1488 void __user *arg)
1489 {
1490 struct xfs_trans *tp;
1491 struct fsxattr fa;
1492 unsigned int flags;
1493 int join_flags = 0;
1494 int error;
1495
1496 if (copy_from_user(&flags, arg, sizeof(flags)))
1497 return -EFAULT;
1498
1499 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1500 FS_NOATIME_FL | FS_NODUMP_FL | \
1501 FS_SYNC_FL))
1502 return -EOPNOTSUPP;
1503
1504 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1505
1506 error = mnt_want_write_file(filp);
1507 if (error)
1508 return error;
1509
1510 /*
1511 * Changing DAX config may require inode locking for mapping
1512 * invalidation. These need to be held all the way to transaction commit
1513 * or cancel time, so need to be passed through to
1514 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1515 * appropriately.
1516 */
1517 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1518 if (error)
1519 goto out_drop_write;
1520
1521 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1522 if (IS_ERR(tp)) {
1523 error = PTR_ERR(tp);
1524 goto out_drop_write;
1525 }
1526
1527 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1528 if (error) {
1529 xfs_trans_cancel(tp);
1530 goto out_drop_write;
1531 }
1532
1533 error = xfs_trans_commit(tp);
1534 out_drop_write:
1535 mnt_drop_write_file(filp);
1536 return error;
1537 }
1538
1539 static bool
xfs_getbmap_format(struct kgetbmap * p,struct getbmapx __user * u,size_t recsize)1540 xfs_getbmap_format(
1541 struct kgetbmap *p,
1542 struct getbmapx __user *u,
1543 size_t recsize)
1544 {
1545 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1546 put_user(p->bmv_block, &u->bmv_block) ||
1547 put_user(p->bmv_length, &u->bmv_length) ||
1548 put_user(0, &u->bmv_count) ||
1549 put_user(0, &u->bmv_entries))
1550 return false;
1551 if (recsize < sizeof(struct getbmapx))
1552 return true;
1553 if (put_user(0, &u->bmv_iflags) ||
1554 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1555 put_user(0, &u->bmv_unused1) ||
1556 put_user(0, &u->bmv_unused2))
1557 return false;
1558 return true;
1559 }
1560
1561 STATIC int
xfs_ioc_getbmap(struct file * file,unsigned int cmd,void __user * arg)1562 xfs_ioc_getbmap(
1563 struct file *file,
1564 unsigned int cmd,
1565 void __user *arg)
1566 {
1567 struct getbmapx bmx = { 0 };
1568 struct kgetbmap *buf;
1569 size_t recsize;
1570 int error, i;
1571
1572 switch (cmd) {
1573 case XFS_IOC_GETBMAPA:
1574 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1575 /*FALLTHRU*/
1576 case XFS_IOC_GETBMAP:
1577 if (file->f_mode & FMODE_NOCMTIME)
1578 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1579 /* struct getbmap is a strict subset of struct getbmapx. */
1580 recsize = sizeof(struct getbmap);
1581 break;
1582 case XFS_IOC_GETBMAPX:
1583 recsize = sizeof(struct getbmapx);
1584 break;
1585 default:
1586 return -EINVAL;
1587 }
1588
1589 if (copy_from_user(&bmx, arg, recsize))
1590 return -EFAULT;
1591
1592 if (bmx.bmv_count < 2)
1593 return -EINVAL;
1594 if (bmx.bmv_count > ULONG_MAX / recsize)
1595 return -ENOMEM;
1596
1597 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1598 if (!buf)
1599 return -ENOMEM;
1600
1601 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1602 if (error)
1603 goto out_free_buf;
1604
1605 error = -EFAULT;
1606 if (copy_to_user(arg, &bmx, recsize))
1607 goto out_free_buf;
1608 arg += recsize;
1609
1610 for (i = 0; i < bmx.bmv_entries; i++) {
1611 if (!xfs_getbmap_format(buf + i, arg, recsize))
1612 goto out_free_buf;
1613 arg += recsize;
1614 }
1615
1616 error = 0;
1617 out_free_buf:
1618 kmem_free(buf);
1619 return 0;
1620 }
1621
1622 struct getfsmap_info {
1623 struct xfs_mount *mp;
1624 struct fsmap_head __user *data;
1625 unsigned int idx;
1626 __u32 last_flags;
1627 };
1628
1629 STATIC int
xfs_getfsmap_format(struct xfs_fsmap * xfm,void * priv)1630 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1631 {
1632 struct getfsmap_info *info = priv;
1633 struct fsmap fm;
1634
1635 trace_xfs_getfsmap_mapping(info->mp, xfm);
1636
1637 info->last_flags = xfm->fmr_flags;
1638 xfs_fsmap_from_internal(&fm, xfm);
1639 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1640 sizeof(struct fsmap)))
1641 return -EFAULT;
1642
1643 return 0;
1644 }
1645
1646 STATIC int
xfs_ioc_getfsmap(struct xfs_inode * ip,struct fsmap_head __user * arg)1647 xfs_ioc_getfsmap(
1648 struct xfs_inode *ip,
1649 struct fsmap_head __user *arg)
1650 {
1651 struct getfsmap_info info = { NULL };
1652 struct xfs_fsmap_head xhead = {0};
1653 struct fsmap_head head;
1654 bool aborted = false;
1655 int error;
1656
1657 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1658 return -EFAULT;
1659 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1660 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1661 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1662 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1663 sizeof(head.fmh_keys[1].fmr_reserved)))
1664 return -EINVAL;
1665
1666 xhead.fmh_iflags = head.fmh_iflags;
1667 xhead.fmh_count = head.fmh_count;
1668 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1669 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1670
1671 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1672 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1673
1674 info.mp = ip->i_mount;
1675 info.data = arg;
1676 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1677 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1678 error = 0;
1679 aborted = true;
1680 } else if (error)
1681 return error;
1682
1683 /* If we didn't abort, set the "last" flag in the last fmx */
1684 if (!aborted && info.idx) {
1685 info.last_flags |= FMR_OF_LAST;
1686 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1687 &info.last_flags, sizeof(info.last_flags)))
1688 return -EFAULT;
1689 }
1690
1691 /* copy back header */
1692 head.fmh_entries = xhead.fmh_entries;
1693 head.fmh_oflags = xhead.fmh_oflags;
1694 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1695 return -EFAULT;
1696
1697 return 0;
1698 }
1699
1700 STATIC int
xfs_ioc_scrub_metadata(struct xfs_inode * ip,void __user * arg)1701 xfs_ioc_scrub_metadata(
1702 struct xfs_inode *ip,
1703 void __user *arg)
1704 {
1705 struct xfs_scrub_metadata scrub;
1706 int error;
1707
1708 if (!capable(CAP_SYS_ADMIN))
1709 return -EPERM;
1710
1711 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1712 return -EFAULT;
1713
1714 error = xfs_scrub_metadata(ip, &scrub);
1715 if (error)
1716 return error;
1717
1718 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1719 return -EFAULT;
1720
1721 return 0;
1722 }
1723
1724 int
xfs_ioc_swapext(xfs_swapext_t * sxp)1725 xfs_ioc_swapext(
1726 xfs_swapext_t *sxp)
1727 {
1728 xfs_inode_t *ip, *tip;
1729 struct fd f, tmp;
1730 int error = 0;
1731
1732 /* Pull information for the target fd */
1733 f = fdget((int)sxp->sx_fdtarget);
1734 if (!f.file) {
1735 error = -EINVAL;
1736 goto out;
1737 }
1738
1739 if (!(f.file->f_mode & FMODE_WRITE) ||
1740 !(f.file->f_mode & FMODE_READ) ||
1741 (f.file->f_flags & O_APPEND)) {
1742 error = -EBADF;
1743 goto out_put_file;
1744 }
1745
1746 tmp = fdget((int)sxp->sx_fdtmp);
1747 if (!tmp.file) {
1748 error = -EINVAL;
1749 goto out_put_file;
1750 }
1751
1752 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1753 !(tmp.file->f_mode & FMODE_READ) ||
1754 (tmp.file->f_flags & O_APPEND)) {
1755 error = -EBADF;
1756 goto out_put_tmp_file;
1757 }
1758
1759 if (IS_SWAPFILE(file_inode(f.file)) ||
1760 IS_SWAPFILE(file_inode(tmp.file))) {
1761 error = -EINVAL;
1762 goto out_put_tmp_file;
1763 }
1764
1765 /*
1766 * We need to ensure that the fds passed in point to XFS inodes
1767 * before we cast and access them as XFS structures as we have no
1768 * control over what the user passes us here.
1769 */
1770 if (f.file->f_op != &xfs_file_operations ||
1771 tmp.file->f_op != &xfs_file_operations) {
1772 error = -EINVAL;
1773 goto out_put_tmp_file;
1774 }
1775
1776 ip = XFS_I(file_inode(f.file));
1777 tip = XFS_I(file_inode(tmp.file));
1778
1779 if (ip->i_mount != tip->i_mount) {
1780 error = -EINVAL;
1781 goto out_put_tmp_file;
1782 }
1783
1784 if (ip->i_ino == tip->i_ino) {
1785 error = -EINVAL;
1786 goto out_put_tmp_file;
1787 }
1788
1789 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1790 error = -EIO;
1791 goto out_put_tmp_file;
1792 }
1793
1794 error = xfs_swap_extents(ip, tip, sxp);
1795
1796 out_put_tmp_file:
1797 fdput(tmp);
1798 out_put_file:
1799 fdput(f);
1800 out:
1801 return error;
1802 }
1803
1804 static int
xfs_ioc_getlabel(struct xfs_mount * mp,char __user * user_label)1805 xfs_ioc_getlabel(
1806 struct xfs_mount *mp,
1807 char __user *user_label)
1808 {
1809 struct xfs_sb *sbp = &mp->m_sb;
1810 char label[XFSLABEL_MAX + 1];
1811
1812 /* Paranoia */
1813 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1814
1815 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1816 memset(label, 0, sizeof(label));
1817 spin_lock(&mp->m_sb_lock);
1818 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1819 spin_unlock(&mp->m_sb_lock);
1820
1821 if (copy_to_user(user_label, label, sizeof(label)))
1822 return -EFAULT;
1823 return 0;
1824 }
1825
1826 static int
xfs_ioc_setlabel(struct file * filp,struct xfs_mount * mp,char __user * newlabel)1827 xfs_ioc_setlabel(
1828 struct file *filp,
1829 struct xfs_mount *mp,
1830 char __user *newlabel)
1831 {
1832 struct xfs_sb *sbp = &mp->m_sb;
1833 char label[XFSLABEL_MAX + 1];
1834 size_t len;
1835 int error;
1836
1837 if (!capable(CAP_SYS_ADMIN))
1838 return -EPERM;
1839 /*
1840 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1841 * smaller, at 12 bytes. We copy one more to be sure we find the
1842 * (required) NULL character to test the incoming label length.
1843 * NB: The on disk label doesn't need to be null terminated.
1844 */
1845 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1846 return -EFAULT;
1847 len = strnlen(label, XFSLABEL_MAX + 1);
1848 if (len > sizeof(sbp->sb_fname))
1849 return -EINVAL;
1850
1851 error = mnt_want_write_file(filp);
1852 if (error)
1853 return error;
1854
1855 spin_lock(&mp->m_sb_lock);
1856 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1857 memcpy(sbp->sb_fname, label, len);
1858 spin_unlock(&mp->m_sb_lock);
1859
1860 /*
1861 * Now we do several things to satisfy userspace.
1862 * In addition to normal logging of the primary superblock, we also
1863 * immediately write these changes to sector zero for the primary, then
1864 * update all backup supers (as xfs_db does for a label change), then
1865 * invalidate the block device page cache. This is so that any prior
1866 * buffered reads from userspace (i.e. from blkid) are invalidated,
1867 * and userspace will see the newly-written label.
1868 */
1869 error = xfs_sync_sb_buf(mp);
1870 if (error)
1871 goto out;
1872 /*
1873 * growfs also updates backup supers so lock against that.
1874 */
1875 mutex_lock(&mp->m_growlock);
1876 error = xfs_update_secondary_sbs(mp);
1877 mutex_unlock(&mp->m_growlock);
1878
1879 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1880
1881 out:
1882 mnt_drop_write_file(filp);
1883 return error;
1884 }
1885
1886 /*
1887 * Note: some of the ioctl's return positive numbers as a
1888 * byte count indicating success, such as readlink_by_handle.
1889 * So we don't "sign flip" like most other routines. This means
1890 * true errors need to be returned as a negative value.
1891 */
1892 long
xfs_file_ioctl(struct file * filp,unsigned int cmd,unsigned long p)1893 xfs_file_ioctl(
1894 struct file *filp,
1895 unsigned int cmd,
1896 unsigned long p)
1897 {
1898 struct inode *inode = file_inode(filp);
1899 struct xfs_inode *ip = XFS_I(inode);
1900 struct xfs_mount *mp = ip->i_mount;
1901 void __user *arg = (void __user *)p;
1902 int error;
1903
1904 trace_xfs_file_ioctl(ip);
1905
1906 switch (cmd) {
1907 case FITRIM:
1908 return xfs_ioc_trim(mp, arg);
1909 case FS_IOC_GETFSLABEL:
1910 return xfs_ioc_getlabel(mp, arg);
1911 case FS_IOC_SETFSLABEL:
1912 return xfs_ioc_setlabel(filp, mp, arg);
1913 case XFS_IOC_ALLOCSP:
1914 case XFS_IOC_FREESP:
1915 case XFS_IOC_RESVSP:
1916 case XFS_IOC_UNRESVSP:
1917 case XFS_IOC_ALLOCSP64:
1918 case XFS_IOC_FREESP64:
1919 case XFS_IOC_RESVSP64:
1920 case XFS_IOC_UNRESVSP64:
1921 case XFS_IOC_ZERO_RANGE: {
1922 xfs_flock64_t bf;
1923
1924 if (copy_from_user(&bf, arg, sizeof(bf)))
1925 return -EFAULT;
1926 return xfs_ioc_space(filp, cmd, &bf);
1927 }
1928 case XFS_IOC_DIOINFO: {
1929 struct dioattr da;
1930 xfs_buftarg_t *target =
1931 XFS_IS_REALTIME_INODE(ip) ?
1932 mp->m_rtdev_targp : mp->m_ddev_targp;
1933
1934 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1935 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1936
1937 if (copy_to_user(arg, &da, sizeof(da)))
1938 return -EFAULT;
1939 return 0;
1940 }
1941
1942 case XFS_IOC_FSBULKSTAT_SINGLE:
1943 case XFS_IOC_FSBULKSTAT:
1944 case XFS_IOC_FSINUMBERS:
1945 return xfs_ioc_bulkstat(mp, cmd, arg);
1946
1947 case XFS_IOC_FSGEOMETRY_V1:
1948 return xfs_ioc_fsgeometry_v1(mp, arg);
1949
1950 case XFS_IOC_FSGEOMETRY:
1951 return xfs_ioc_fsgeometry(mp, arg);
1952
1953 case XFS_IOC_GETVERSION:
1954 return put_user(inode->i_generation, (int __user *)arg);
1955
1956 case XFS_IOC_FSGETXATTR:
1957 return xfs_ioc_fsgetxattr(ip, 0, arg);
1958 case XFS_IOC_FSGETXATTRA:
1959 return xfs_ioc_fsgetxattr(ip, 1, arg);
1960 case XFS_IOC_FSSETXATTR:
1961 return xfs_ioc_fssetxattr(ip, filp, arg);
1962 case XFS_IOC_GETXFLAGS:
1963 return xfs_ioc_getxflags(ip, arg);
1964 case XFS_IOC_SETXFLAGS:
1965 return xfs_ioc_setxflags(ip, filp, arg);
1966
1967 case XFS_IOC_FSSETDM: {
1968 struct fsdmidata dmi;
1969
1970 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1971 return -EFAULT;
1972
1973 error = mnt_want_write_file(filp);
1974 if (error)
1975 return error;
1976
1977 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1978 dmi.fsd_dmstate);
1979 mnt_drop_write_file(filp);
1980 return error;
1981 }
1982
1983 case XFS_IOC_GETBMAP:
1984 case XFS_IOC_GETBMAPA:
1985 case XFS_IOC_GETBMAPX:
1986 return xfs_ioc_getbmap(filp, cmd, arg);
1987
1988 case FS_IOC_GETFSMAP:
1989 return xfs_ioc_getfsmap(ip, arg);
1990
1991 case XFS_IOC_SCRUB_METADATA:
1992 return xfs_ioc_scrub_metadata(ip, arg);
1993
1994 case XFS_IOC_FD_TO_HANDLE:
1995 case XFS_IOC_PATH_TO_HANDLE:
1996 case XFS_IOC_PATH_TO_FSHANDLE: {
1997 xfs_fsop_handlereq_t hreq;
1998
1999 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2000 return -EFAULT;
2001 return xfs_find_handle(cmd, &hreq);
2002 }
2003 case XFS_IOC_OPEN_BY_HANDLE: {
2004 xfs_fsop_handlereq_t hreq;
2005
2006 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2007 return -EFAULT;
2008 return xfs_open_by_handle(filp, &hreq);
2009 }
2010 case XFS_IOC_FSSETDM_BY_HANDLE:
2011 return xfs_fssetdm_by_handle(filp, arg);
2012
2013 case XFS_IOC_READLINK_BY_HANDLE: {
2014 xfs_fsop_handlereq_t hreq;
2015
2016 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2017 return -EFAULT;
2018 return xfs_readlink_by_handle(filp, &hreq);
2019 }
2020 case XFS_IOC_ATTRLIST_BY_HANDLE:
2021 return xfs_attrlist_by_handle(filp, arg);
2022
2023 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2024 return xfs_attrmulti_by_handle(filp, arg);
2025
2026 case XFS_IOC_SWAPEXT: {
2027 struct xfs_swapext sxp;
2028
2029 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2030 return -EFAULT;
2031 error = mnt_want_write_file(filp);
2032 if (error)
2033 return error;
2034 error = xfs_ioc_swapext(&sxp);
2035 mnt_drop_write_file(filp);
2036 return error;
2037 }
2038
2039 case XFS_IOC_FSCOUNTS: {
2040 xfs_fsop_counts_t out;
2041
2042 error = xfs_fs_counts(mp, &out);
2043 if (error)
2044 return error;
2045
2046 if (copy_to_user(arg, &out, sizeof(out)))
2047 return -EFAULT;
2048 return 0;
2049 }
2050
2051 case XFS_IOC_SET_RESBLKS: {
2052 xfs_fsop_resblks_t inout;
2053 uint64_t in;
2054
2055 if (!capable(CAP_SYS_ADMIN))
2056 return -EPERM;
2057
2058 if (mp->m_flags & XFS_MOUNT_RDONLY)
2059 return -EROFS;
2060
2061 if (copy_from_user(&inout, arg, sizeof(inout)))
2062 return -EFAULT;
2063
2064 error = mnt_want_write_file(filp);
2065 if (error)
2066 return error;
2067
2068 /* input parameter is passed in resblks field of structure */
2069 in = inout.resblks;
2070 error = xfs_reserve_blocks(mp, &in, &inout);
2071 mnt_drop_write_file(filp);
2072 if (error)
2073 return error;
2074
2075 if (copy_to_user(arg, &inout, sizeof(inout)))
2076 return -EFAULT;
2077 return 0;
2078 }
2079
2080 case XFS_IOC_GET_RESBLKS: {
2081 xfs_fsop_resblks_t out;
2082
2083 if (!capable(CAP_SYS_ADMIN))
2084 return -EPERM;
2085
2086 error = xfs_reserve_blocks(mp, NULL, &out);
2087 if (error)
2088 return error;
2089
2090 if (copy_to_user(arg, &out, sizeof(out)))
2091 return -EFAULT;
2092
2093 return 0;
2094 }
2095
2096 case XFS_IOC_FSGROWFSDATA: {
2097 xfs_growfs_data_t in;
2098
2099 if (copy_from_user(&in, arg, sizeof(in)))
2100 return -EFAULT;
2101
2102 error = mnt_want_write_file(filp);
2103 if (error)
2104 return error;
2105 error = xfs_growfs_data(mp, &in);
2106 mnt_drop_write_file(filp);
2107 return error;
2108 }
2109
2110 case XFS_IOC_FSGROWFSLOG: {
2111 xfs_growfs_log_t in;
2112
2113 if (copy_from_user(&in, arg, sizeof(in)))
2114 return -EFAULT;
2115
2116 error = mnt_want_write_file(filp);
2117 if (error)
2118 return error;
2119 error = xfs_growfs_log(mp, &in);
2120 mnt_drop_write_file(filp);
2121 return error;
2122 }
2123
2124 case XFS_IOC_FSGROWFSRT: {
2125 xfs_growfs_rt_t in;
2126
2127 if (copy_from_user(&in, arg, sizeof(in)))
2128 return -EFAULT;
2129
2130 error = mnt_want_write_file(filp);
2131 if (error)
2132 return error;
2133 error = xfs_growfs_rt(mp, &in);
2134 mnt_drop_write_file(filp);
2135 return error;
2136 }
2137
2138 case XFS_IOC_GOINGDOWN: {
2139 uint32_t in;
2140
2141 if (!capable(CAP_SYS_ADMIN))
2142 return -EPERM;
2143
2144 if (get_user(in, (uint32_t __user *)arg))
2145 return -EFAULT;
2146
2147 return xfs_fs_goingdown(mp, in);
2148 }
2149
2150 case XFS_IOC_ERROR_INJECTION: {
2151 xfs_error_injection_t in;
2152
2153 if (!capable(CAP_SYS_ADMIN))
2154 return -EPERM;
2155
2156 if (copy_from_user(&in, arg, sizeof(in)))
2157 return -EFAULT;
2158
2159 return xfs_errortag_add(mp, in.errtag);
2160 }
2161
2162 case XFS_IOC_ERROR_CLEARALL:
2163 if (!capable(CAP_SYS_ADMIN))
2164 return -EPERM;
2165
2166 return xfs_errortag_clearall(mp);
2167
2168 case XFS_IOC_FREE_EOFBLOCKS: {
2169 struct xfs_fs_eofblocks eofb;
2170 struct xfs_eofblocks keofb;
2171
2172 if (!capable(CAP_SYS_ADMIN))
2173 return -EPERM;
2174
2175 if (mp->m_flags & XFS_MOUNT_RDONLY)
2176 return -EROFS;
2177
2178 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2179 return -EFAULT;
2180
2181 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2182 if (error)
2183 return error;
2184
2185 return xfs_icache_free_eofblocks(mp, &keofb);
2186 }
2187
2188 default:
2189 return -ENOTTY;
2190 }
2191 }
2192
