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Merge tag 'optee-fix-for-v5.13' of git://git.linaro.org/people/jens.wiklander/linux...
[mirror_ubuntu-jammy-kernel.git] / fs / xfs / xfs_ioctl.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #include "xfs.h"
7 #include "xfs_fs.h"
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_mount.h"
13 #include "xfs_inode.h"
14 #include "xfs_rtalloc.h"
15 #include "xfs_iwalk.h"
16 #include "xfs_itable.h"
17 #include "xfs_error.h"
18 #include "xfs_attr.h"
19 #include "xfs_bmap.h"
20 #include "xfs_bmap_util.h"
21 #include "xfs_fsops.h"
22 #include "xfs_discard.h"
23 #include "xfs_quota.h"
24 #include "xfs_export.h"
25 #include "xfs_trace.h"
26 #include "xfs_icache.h"
27 #include "xfs_trans.h"
28 #include "xfs_acl.h"
29 #include "xfs_btree.h"
30 #include <linux/fsmap.h>
31 #include "xfs_fsmap.h"
32 #include "scrub/xfs_scrub.h"
33 #include "xfs_sb.h"
34 #include "xfs_ag.h"
35 #include "xfs_health.h"
36 #include "xfs_reflink.h"
37 #include "xfs_ioctl.h"
38 #include "xfs_da_format.h"
39 #include "xfs_da_btree.h"
40
41 #include <linux/mount.h>
42 #include <linux/namei.h>
43 #include <linux/fileattr.h>
44
45 /*
46 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
47 * a file or fs handle.
48 *
49 * XFS_IOC_PATH_TO_FSHANDLE
50 * returns fs handle for a mount point or path within that mount point
51 * XFS_IOC_FD_TO_HANDLE
52 * returns full handle for a FD opened in user space
53 * XFS_IOC_PATH_TO_HANDLE
54 * returns full handle for a path
55 */
56 int
57 xfs_find_handle(
58 unsigned int cmd,
59 xfs_fsop_handlereq_t *hreq)
60 {
61 int hsize;
62 xfs_handle_t handle;
63 struct inode *inode;
64 struct fd f = {NULL};
65 struct path path;
66 int error;
67 struct xfs_inode *ip;
68
69 if (cmd == XFS_IOC_FD_TO_HANDLE) {
70 f = fdget(hreq->fd);
71 if (!f.file)
72 return -EBADF;
73 inode = file_inode(f.file);
74 } else {
75 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
76 if (error)
77 return error;
78 inode = d_inode(path.dentry);
79 }
80 ip = XFS_I(inode);
81
82 /*
83 * We can only generate handles for inodes residing on a XFS filesystem,
84 * and only for regular files, directories or symbolic links.
85 */
86 error = -EINVAL;
87 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
88 goto out_put;
89
90 error = -EBADF;
91 if (!S_ISREG(inode->i_mode) &&
92 !S_ISDIR(inode->i_mode) &&
93 !S_ISLNK(inode->i_mode))
94 goto out_put;
95
96
97 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
98
99 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
100 /*
101 * This handle only contains an fsid, zero the rest.
102 */
103 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
104 hsize = sizeof(xfs_fsid_t);
105 } else {
106 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
107 sizeof(handle.ha_fid.fid_len);
108 handle.ha_fid.fid_pad = 0;
109 handle.ha_fid.fid_gen = inode->i_generation;
110 handle.ha_fid.fid_ino = ip->i_ino;
111 hsize = sizeof(xfs_handle_t);
112 }
113
114 error = -EFAULT;
115 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
116 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
117 goto out_put;
118
119 error = 0;
120
121 out_put:
122 if (cmd == XFS_IOC_FD_TO_HANDLE)
123 fdput(f);
124 else
125 path_put(&path);
126 return error;
127 }
128
129 /*
130 * No need to do permission checks on the various pathname components
131 * as the handle operations are privileged.
132 */
133 STATIC int
134 xfs_handle_acceptable(
135 void *context,
136 struct dentry *dentry)
137 {
138 return 1;
139 }
140
141 /*
142 * Convert userspace handle data into a dentry.
143 */
144 struct dentry *
145 xfs_handle_to_dentry(
146 struct file *parfilp,
147 void __user *uhandle,
148 u32 hlen)
149 {
150 xfs_handle_t handle;
151 struct xfs_fid64 fid;
152
153 /*
154 * Only allow handle opens under a directory.
155 */
156 if (!S_ISDIR(file_inode(parfilp)->i_mode))
157 return ERR_PTR(-ENOTDIR);
158
159 if (hlen != sizeof(xfs_handle_t))
160 return ERR_PTR(-EINVAL);
161 if (copy_from_user(&handle, uhandle, hlen))
162 return ERR_PTR(-EFAULT);
163 if (handle.ha_fid.fid_len !=
164 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
165 return ERR_PTR(-EINVAL);
166
167 memset(&fid, 0, sizeof(struct fid));
168 fid.ino = handle.ha_fid.fid_ino;
169 fid.gen = handle.ha_fid.fid_gen;
170
171 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
172 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
173 xfs_handle_acceptable, NULL);
174 }
175
176 STATIC struct dentry *
177 xfs_handlereq_to_dentry(
178 struct file *parfilp,
179 xfs_fsop_handlereq_t *hreq)
180 {
181 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
182 }
183
184 int
185 xfs_open_by_handle(
186 struct file *parfilp,
187 xfs_fsop_handlereq_t *hreq)
188 {
189 const struct cred *cred = current_cred();
190 int error;
191 int fd;
192 int permflag;
193 struct file *filp;
194 struct inode *inode;
195 struct dentry *dentry;
196 fmode_t fmode;
197 struct path path;
198
199 if (!capable(CAP_SYS_ADMIN))
200 return -EPERM;
201
202 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
203 if (IS_ERR(dentry))
204 return PTR_ERR(dentry);
205 inode = d_inode(dentry);
206
207 /* Restrict xfs_open_by_handle to directories & regular files. */
208 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
209 error = -EPERM;
210 goto out_dput;
211 }
212
213 #if BITS_PER_LONG != 32
214 hreq->oflags |= O_LARGEFILE;
215 #endif
216
217 permflag = hreq->oflags;
218 fmode = OPEN_FMODE(permflag);
219 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
220 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
221 error = -EPERM;
222 goto out_dput;
223 }
224
225 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
226 error = -EPERM;
227 goto out_dput;
228 }
229
230 /* Can't write directories. */
231 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
232 error = -EISDIR;
233 goto out_dput;
234 }
235
236 fd = get_unused_fd_flags(0);
237 if (fd < 0) {
238 error = fd;
239 goto out_dput;
240 }
241
242 path.mnt = parfilp->f_path.mnt;
243 path.dentry = dentry;
244 filp = dentry_open(&path, hreq->oflags, cred);
245 dput(dentry);
246 if (IS_ERR(filp)) {
247 put_unused_fd(fd);
248 return PTR_ERR(filp);
249 }
250
251 if (S_ISREG(inode->i_mode)) {
252 filp->f_flags |= O_NOATIME;
253 filp->f_mode |= FMODE_NOCMTIME;
254 }
255
256 fd_install(fd, filp);
257 return fd;
258
259 out_dput:
260 dput(dentry);
261 return error;
262 }
263
264 int
265 xfs_readlink_by_handle(
266 struct file *parfilp,
267 xfs_fsop_handlereq_t *hreq)
268 {
269 struct dentry *dentry;
270 __u32 olen;
271 int error;
272
273 if (!capable(CAP_SYS_ADMIN))
274 return -EPERM;
275
276 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
277 if (IS_ERR(dentry))
278 return PTR_ERR(dentry);
279
280 /* Restrict this handle operation to symlinks only. */
281 if (!d_is_symlink(dentry)) {
282 error = -EINVAL;
283 goto out_dput;
284 }
285
286 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
287 error = -EFAULT;
288 goto out_dput;
289 }
290
291 error = vfs_readlink(dentry, hreq->ohandle, olen);
292
293 out_dput:
294 dput(dentry);
295 return error;
296 }
297
298 /*
299 * Format an attribute and copy it out to the user's buffer.
300 * Take care to check values and protect against them changing later,
301 * we may be reading them directly out of a user buffer.
302 */
303 static void
304 xfs_ioc_attr_put_listent(
305 struct xfs_attr_list_context *context,
306 int flags,
307 unsigned char *name,
308 int namelen,
309 int valuelen)
310 {
311 struct xfs_attrlist *alist = context->buffer;
312 struct xfs_attrlist_ent *aep;
313 int arraytop;
314
315 ASSERT(!context->seen_enough);
316 ASSERT(context->count >= 0);
317 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
318 ASSERT(context->firstu >= sizeof(*alist));
319 ASSERT(context->firstu <= context->bufsize);
320
321 /*
322 * Only list entries in the right namespace.
323 */
324 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
325 return;
326
327 arraytop = sizeof(*alist) +
328 context->count * sizeof(alist->al_offset[0]);
329
330 /* decrement by the actual bytes used by the attr */
331 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
332 namelen + 1, sizeof(uint32_t));
333 if (context->firstu < arraytop) {
334 trace_xfs_attr_list_full(context);
335 alist->al_more = 1;
336 context->seen_enough = 1;
337 return;
338 }
339
340 aep = context->buffer + context->firstu;
341 aep->a_valuelen = valuelen;
342 memcpy(aep->a_name, name, namelen);
343 aep->a_name[namelen] = 0;
344 alist->al_offset[context->count++] = context->firstu;
345 alist->al_count = context->count;
346 trace_xfs_attr_list_add(context);
347 }
348
349 static unsigned int
350 xfs_attr_filter(
351 u32 ioc_flags)
352 {
353 if (ioc_flags & XFS_IOC_ATTR_ROOT)
354 return XFS_ATTR_ROOT;
355 if (ioc_flags & XFS_IOC_ATTR_SECURE)
356 return XFS_ATTR_SECURE;
357 return 0;
358 }
359
360 static unsigned int
361 xfs_attr_flags(
362 u32 ioc_flags)
363 {
364 if (ioc_flags & XFS_IOC_ATTR_CREATE)
365 return XATTR_CREATE;
366 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
367 return XATTR_REPLACE;
368 return 0;
369 }
370
371 int
372 xfs_ioc_attr_list(
373 struct xfs_inode *dp,
374 void __user *ubuf,
375 int bufsize,
376 int flags,
377 struct xfs_attrlist_cursor __user *ucursor)
378 {
379 struct xfs_attr_list_context context = { };
380 struct xfs_attrlist *alist;
381 void *buffer;
382 int error;
383
384 if (bufsize < sizeof(struct xfs_attrlist) ||
385 bufsize > XFS_XATTR_LIST_MAX)
386 return -EINVAL;
387
388 /*
389 * Reject flags, only allow namespaces.
390 */
391 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
392 return -EINVAL;
393 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
394 return -EINVAL;
395
396 /*
397 * Validate the cursor.
398 */
399 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
400 return -EFAULT;
401 if (context.cursor.pad1 || context.cursor.pad2)
402 return -EINVAL;
403 if (!context.cursor.initted &&
404 (context.cursor.hashval || context.cursor.blkno ||
405 context.cursor.offset))
406 return -EINVAL;
407
408 buffer = kvzalloc(bufsize, GFP_KERNEL);
409 if (!buffer)
410 return -ENOMEM;
411
412 /*
413 * Initialize the output buffer.
414 */
415 context.dp = dp;
416 context.resynch = 1;
417 context.attr_filter = xfs_attr_filter(flags);
418 context.buffer = buffer;
419 context.bufsize = round_down(bufsize, sizeof(uint32_t));
420 context.firstu = context.bufsize;
421 context.put_listent = xfs_ioc_attr_put_listent;
422
423 alist = context.buffer;
424 alist->al_count = 0;
425 alist->al_more = 0;
426 alist->al_offset[0] = context.bufsize;
427
428 error = xfs_attr_list(&context);
429 if (error)
430 goto out_free;
431
432 if (copy_to_user(ubuf, buffer, bufsize) ||
433 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
434 error = -EFAULT;
435 out_free:
436 kmem_free(buffer);
437 return error;
438 }
439
440 STATIC int
441 xfs_attrlist_by_handle(
442 struct file *parfilp,
443 struct xfs_fsop_attrlist_handlereq __user *p)
444 {
445 struct xfs_fsop_attrlist_handlereq al_hreq;
446 struct dentry *dentry;
447 int error = -ENOMEM;
448
449 if (!capable(CAP_SYS_ADMIN))
450 return -EPERM;
451 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
452 return -EFAULT;
453
454 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
455 if (IS_ERR(dentry))
456 return PTR_ERR(dentry);
457
458 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
459 al_hreq.buflen, al_hreq.flags, &p->pos);
460 dput(dentry);
461 return error;
462 }
463
464 static int
465 xfs_attrmulti_attr_get(
466 struct inode *inode,
467 unsigned char *name,
468 unsigned char __user *ubuf,
469 uint32_t *len,
470 uint32_t flags)
471 {
472 struct xfs_da_args args = {
473 .dp = XFS_I(inode),
474 .attr_filter = xfs_attr_filter(flags),
475 .attr_flags = xfs_attr_flags(flags),
476 .name = name,
477 .namelen = strlen(name),
478 .valuelen = *len,
479 };
480 int error;
481
482 if (*len > XFS_XATTR_SIZE_MAX)
483 return -EINVAL;
484
485 error = xfs_attr_get(&args);
486 if (error)
487 goto out_kfree;
488
489 *len = args.valuelen;
490 if (copy_to_user(ubuf, args.value, args.valuelen))
491 error = -EFAULT;
492
493 out_kfree:
494 kmem_free(args.value);
495 return error;
496 }
497
498 static int
499 xfs_attrmulti_attr_set(
500 struct inode *inode,
501 unsigned char *name,
502 const unsigned char __user *ubuf,
503 uint32_t len,
504 uint32_t flags)
505 {
506 struct xfs_da_args args = {
507 .dp = XFS_I(inode),
508 .attr_filter = xfs_attr_filter(flags),
509 .attr_flags = xfs_attr_flags(flags),
510 .name = name,
511 .namelen = strlen(name),
512 };
513 int error;
514
515 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
516 return -EPERM;
517
518 if (ubuf) {
519 if (len > XFS_XATTR_SIZE_MAX)
520 return -EINVAL;
521 args.value = memdup_user(ubuf, len);
522 if (IS_ERR(args.value))
523 return PTR_ERR(args.value);
524 args.valuelen = len;
525 }
526
527 error = xfs_attr_set(&args);
528 if (!error && (flags & XFS_IOC_ATTR_ROOT))
529 xfs_forget_acl(inode, name);
530 kfree(args.value);
531 return error;
532 }
533
534 int
535 xfs_ioc_attrmulti_one(
536 struct file *parfilp,
537 struct inode *inode,
538 uint32_t opcode,
539 void __user *uname,
540 void __user *value,
541 uint32_t *len,
542 uint32_t flags)
543 {
544 unsigned char *name;
545 int error;
546
547 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
548 return -EINVAL;
549
550 name = strndup_user(uname, MAXNAMELEN);
551 if (IS_ERR(name))
552 return PTR_ERR(name);
553
554 switch (opcode) {
555 case ATTR_OP_GET:
556 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
557 break;
558 case ATTR_OP_REMOVE:
559 value = NULL;
560 *len = 0;
561 /* fall through */
562 case ATTR_OP_SET:
563 error = mnt_want_write_file(parfilp);
564 if (error)
565 break;
566 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
567 mnt_drop_write_file(parfilp);
568 break;
569 default:
570 error = -EINVAL;
571 break;
572 }
573
574 kfree(name);
575 return error;
576 }
577
578 STATIC int
579 xfs_attrmulti_by_handle(
580 struct file *parfilp,
581 void __user *arg)
582 {
583 int error;
584 xfs_attr_multiop_t *ops;
585 xfs_fsop_attrmulti_handlereq_t am_hreq;
586 struct dentry *dentry;
587 unsigned int i, size;
588
589 if (!capable(CAP_SYS_ADMIN))
590 return -EPERM;
591 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
592 return -EFAULT;
593
594 /* overflow check */
595 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
596 return -E2BIG;
597
598 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
599 if (IS_ERR(dentry))
600 return PTR_ERR(dentry);
601
602 error = -E2BIG;
603 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
604 if (!size || size > 16 * PAGE_SIZE)
605 goto out_dput;
606
607 ops = memdup_user(am_hreq.ops, size);
608 if (IS_ERR(ops)) {
609 error = PTR_ERR(ops);
610 goto out_dput;
611 }
612
613 error = 0;
614 for (i = 0; i < am_hreq.opcount; i++) {
615 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
616 d_inode(dentry), ops[i].am_opcode,
617 ops[i].am_attrname, ops[i].am_attrvalue,
618 &ops[i].am_length, ops[i].am_flags);
619 }
620
621 if (copy_to_user(am_hreq.ops, ops, size))
622 error = -EFAULT;
623
624 kfree(ops);
625 out_dput:
626 dput(dentry);
627 return error;
628 }
629
630 int
631 xfs_ioc_space(
632 struct file *filp,
633 xfs_flock64_t *bf)
634 {
635 struct inode *inode = file_inode(filp);
636 struct xfs_inode *ip = XFS_I(inode);
637 struct iattr iattr;
638 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR;
639 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
640 int error;
641
642 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
643 return -EPERM;
644
645 if (!(filp->f_mode & FMODE_WRITE))
646 return -EBADF;
647
648 if (!S_ISREG(inode->i_mode))
649 return -EINVAL;
650
651 if (xfs_is_always_cow_inode(ip))
652 return -EOPNOTSUPP;
653
654 if (filp->f_flags & O_DSYNC)
655 flags |= XFS_PREALLOC_SYNC;
656 if (filp->f_mode & FMODE_NOCMTIME)
657 flags |= XFS_PREALLOC_INVISIBLE;
658
659 error = mnt_want_write_file(filp);
660 if (error)
661 return error;
662
663 xfs_ilock(ip, iolock);
664 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
665 if (error)
666 goto out_unlock;
667 inode_dio_wait(inode);
668
669 switch (bf->l_whence) {
670 case 0: /*SEEK_SET*/
671 break;
672 case 1: /*SEEK_CUR*/
673 bf->l_start += filp->f_pos;
674 break;
675 case 2: /*SEEK_END*/
676 bf->l_start += XFS_ISIZE(ip);
677 break;
678 default:
679 error = -EINVAL;
680 goto out_unlock;
681 }
682
683 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) {
684 error = -EINVAL;
685 goto out_unlock;
686 }
687
688 if (bf->l_start > XFS_ISIZE(ip)) {
689 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
690 bf->l_start - XFS_ISIZE(ip), 0);
691 if (error)
692 goto out_unlock;
693 }
694
695 iattr.ia_valid = ATTR_SIZE;
696 iattr.ia_size = bf->l_start;
697 error = xfs_vn_setattr_size(file_mnt_user_ns(filp), file_dentry(filp),
698 &iattr);
699 if (error)
700 goto out_unlock;
701
702 error = xfs_update_prealloc_flags(ip, flags);
703
704 out_unlock:
705 xfs_iunlock(ip, iolock);
706 mnt_drop_write_file(filp);
707 return error;
708 }
709
710 /* Return 0 on success or positive error */
711 int
712 xfs_fsbulkstat_one_fmt(
713 struct xfs_ibulk *breq,
714 const struct xfs_bulkstat *bstat)
715 {
716 struct xfs_bstat bs1;
717
718 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
719 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
720 return -EFAULT;
721 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
722 }
723
724 int
725 xfs_fsinumbers_fmt(
726 struct xfs_ibulk *breq,
727 const struct xfs_inumbers *igrp)
728 {
729 struct xfs_inogrp ig1;
730
731 xfs_inumbers_to_inogrp(&ig1, igrp);
732 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
733 return -EFAULT;
734 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
735 }
736
737 STATIC int
738 xfs_ioc_fsbulkstat(
739 struct file *file,
740 unsigned int cmd,
741 void __user *arg)
742 {
743 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
744 struct xfs_fsop_bulkreq bulkreq;
745 struct xfs_ibulk breq = {
746 .mp = mp,
747 .mnt_userns = file_mnt_user_ns(file),
748 .ocount = 0,
749 };
750 xfs_ino_t lastino;
751 int error;
752
753 /* done = 1 if there are more stats to get and if bulkstat */
754 /* should be called again (unused here, but used in dmapi) */
755
756 if (!capable(CAP_SYS_ADMIN))
757 return -EPERM;
758
759 if (XFS_FORCED_SHUTDOWN(mp))
760 return -EIO;
761
762 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
763 return -EFAULT;
764
765 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
766 return -EFAULT;
767
768 if (bulkreq.icount <= 0)
769 return -EINVAL;
770
771 if (bulkreq.ubuffer == NULL)
772 return -EINVAL;
773
774 breq.ubuffer = bulkreq.ubuffer;
775 breq.icount = bulkreq.icount;
776
777 /*
778 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
779 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
780 * that *lastip contains either zero or the number of the last inode to
781 * be examined by the previous call and return results starting with
782 * the next inode after that. The new bulk request back end functions
783 * take the inode to start with, so we have to compute the startino
784 * parameter from lastino to maintain correct function. lastino == 0
785 * is a special case because it has traditionally meant "first inode
786 * in filesystem".
787 */
788 if (cmd == XFS_IOC_FSINUMBERS) {
789 breq.startino = lastino ? lastino + 1 : 0;
790 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
791 lastino = breq.startino - 1;
792 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
793 breq.startino = lastino;
794 breq.icount = 1;
795 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
796 } else { /* XFS_IOC_FSBULKSTAT */
797 breq.startino = lastino ? lastino + 1 : 0;
798 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
799 lastino = breq.startino - 1;
800 }
801
802 if (error)
803 return error;
804
805 if (bulkreq.lastip != NULL &&
806 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
807 return -EFAULT;
808
809 if (bulkreq.ocount != NULL &&
810 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
811 return -EFAULT;
812
813 return 0;
814 }
815
816 /* Return 0 on success or positive error */
817 static int
818 xfs_bulkstat_fmt(
819 struct xfs_ibulk *breq,
820 const struct xfs_bulkstat *bstat)
821 {
822 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
823 return -EFAULT;
824 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
825 }
826
827 /*
828 * Check the incoming bulk request @hdr from userspace and initialize the
829 * internal @breq bulk request appropriately. Returns 0 if the bulk request
830 * should proceed; -ECANCELED if there's nothing to do; or the usual
831 * negative error code.
832 */
833 static int
834 xfs_bulk_ireq_setup(
835 struct xfs_mount *mp,
836 struct xfs_bulk_ireq *hdr,
837 struct xfs_ibulk *breq,
838 void __user *ubuffer)
839 {
840 if (hdr->icount == 0 ||
841 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
842 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
843 return -EINVAL;
844
845 breq->startino = hdr->ino;
846 breq->ubuffer = ubuffer;
847 breq->icount = hdr->icount;
848 breq->ocount = 0;
849 breq->flags = 0;
850
851 /*
852 * The @ino parameter is a special value, so we must look it up here.
853 * We're not allowed to have IREQ_AGNO, and we only return one inode
854 * worth of data.
855 */
856 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
857 if (hdr->flags & XFS_BULK_IREQ_AGNO)
858 return -EINVAL;
859
860 switch (hdr->ino) {
861 case XFS_BULK_IREQ_SPECIAL_ROOT:
862 hdr->ino = mp->m_sb.sb_rootino;
863 break;
864 default:
865 return -EINVAL;
866 }
867 breq->icount = 1;
868 }
869
870 /*
871 * The IREQ_AGNO flag means that we only want results from a given AG.
872 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
873 * beyond the specified AG then we return no results.
874 */
875 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
876 if (hdr->agno >= mp->m_sb.sb_agcount)
877 return -EINVAL;
878
879 if (breq->startino == 0)
880 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
881 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
882 return -EINVAL;
883
884 breq->flags |= XFS_IBULK_SAME_AG;
885
886 /* Asking for an inode past the end of the AG? We're done! */
887 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
888 return -ECANCELED;
889 } else if (hdr->agno)
890 return -EINVAL;
891
892 /* Asking for an inode past the end of the FS? We're done! */
893 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
894 return -ECANCELED;
895
896 return 0;
897 }
898
899 /*
900 * Update the userspace bulk request @hdr to reflect the end state of the
901 * internal bulk request @breq.
902 */
903 static void
904 xfs_bulk_ireq_teardown(
905 struct xfs_bulk_ireq *hdr,
906 struct xfs_ibulk *breq)
907 {
908 hdr->ino = breq->startino;
909 hdr->ocount = breq->ocount;
910 }
911
912 /* Handle the v5 bulkstat ioctl. */
913 STATIC int
914 xfs_ioc_bulkstat(
915 struct file *file,
916 unsigned int cmd,
917 struct xfs_bulkstat_req __user *arg)
918 {
919 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
920 struct xfs_bulk_ireq hdr;
921 struct xfs_ibulk breq = {
922 .mp = mp,
923 .mnt_userns = file_mnt_user_ns(file),
924 };
925 int error;
926
927 if (!capable(CAP_SYS_ADMIN))
928 return -EPERM;
929
930 if (XFS_FORCED_SHUTDOWN(mp))
931 return -EIO;
932
933 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
934 return -EFAULT;
935
936 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
937 if (error == -ECANCELED)
938 goto out_teardown;
939 if (error < 0)
940 return error;
941
942 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
943 if (error)
944 return error;
945
946 out_teardown:
947 xfs_bulk_ireq_teardown(&hdr, &breq);
948 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
949 return -EFAULT;
950
951 return 0;
952 }
953
954 STATIC int
955 xfs_inumbers_fmt(
956 struct xfs_ibulk *breq,
957 const struct xfs_inumbers *igrp)
958 {
959 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
960 return -EFAULT;
961 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
962 }
963
964 /* Handle the v5 inumbers ioctl. */
965 STATIC int
966 xfs_ioc_inumbers(
967 struct xfs_mount *mp,
968 unsigned int cmd,
969 struct xfs_inumbers_req __user *arg)
970 {
971 struct xfs_bulk_ireq hdr;
972 struct xfs_ibulk breq = {
973 .mp = mp,
974 };
975 int error;
976
977 if (!capable(CAP_SYS_ADMIN))
978 return -EPERM;
979
980 if (XFS_FORCED_SHUTDOWN(mp))
981 return -EIO;
982
983 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
984 return -EFAULT;
985
986 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
987 if (error == -ECANCELED)
988 goto out_teardown;
989 if (error < 0)
990 return error;
991
992 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
993 if (error)
994 return error;
995
996 out_teardown:
997 xfs_bulk_ireq_teardown(&hdr, &breq);
998 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
999 return -EFAULT;
1000
1001 return 0;
1002 }
1003
1004 STATIC int
1005 xfs_ioc_fsgeometry(
1006 struct xfs_mount *mp,
1007 void __user *arg,
1008 int struct_version)
1009 {
1010 struct xfs_fsop_geom fsgeo;
1011 size_t len;
1012
1013 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version);
1014
1015 if (struct_version <= 3)
1016 len = sizeof(struct xfs_fsop_geom_v1);
1017 else if (struct_version == 4)
1018 len = sizeof(struct xfs_fsop_geom_v4);
1019 else {
1020 xfs_fsop_geom_health(mp, &fsgeo);
1021 len = sizeof(fsgeo);
1022 }
1023
1024 if (copy_to_user(arg, &fsgeo, len))
1025 return -EFAULT;
1026 return 0;
1027 }
1028
1029 STATIC int
1030 xfs_ioc_ag_geometry(
1031 struct xfs_mount *mp,
1032 void __user *arg)
1033 {
1034 struct xfs_ag_geometry ageo;
1035 int error;
1036
1037 if (copy_from_user(&ageo, arg, sizeof(ageo)))
1038 return -EFAULT;
1039 if (ageo.ag_flags)
1040 return -EINVAL;
1041 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
1042 return -EINVAL;
1043
1044 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1045 if (error)
1046 return error;
1047
1048 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1049 return -EFAULT;
1050 return 0;
1051 }
1052
1053 /*
1054 * Linux extended inode flags interface.
1055 */
1056
1057 static void
1058 xfs_fill_fsxattr(
1059 struct xfs_inode *ip,
1060 int whichfork,
1061 struct fileattr *fa)
1062 {
1063 struct xfs_mount *mp = ip->i_mount;
1064 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
1065
1066 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
1067
1068 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1069 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1070 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
1071 fa->fsx_projid = ip->i_projid;
1072 if (ifp && !xfs_need_iread_extents(ifp))
1073 fa->fsx_nextents = xfs_iext_count(ifp);
1074 else
1075 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1076 }
1077
1078 STATIC int
1079 xfs_ioc_fsgetxattra(
1080 xfs_inode_t *ip,
1081 void __user *arg)
1082 {
1083 struct fileattr fa;
1084
1085 xfs_ilock(ip, XFS_ILOCK_SHARED);
1086 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
1087 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1088
1089 return copy_fsxattr_to_user(&fa, arg);
1090 }
1091
1092 int
1093 xfs_fileattr_get(
1094 struct dentry *dentry,
1095 struct fileattr *fa)
1096 {
1097 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1098
1099 if (d_is_special(dentry))
1100 return -ENOTTY;
1101
1102 xfs_ilock(ip, XFS_ILOCK_SHARED);
1103 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
1104 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1105
1106 return 0;
1107 }
1108
1109 STATIC uint16_t
1110 xfs_flags2diflags(
1111 struct xfs_inode *ip,
1112 unsigned int xflags)
1113 {
1114 /* can't set PREALLOC this way, just preserve it */
1115 uint16_t di_flags =
1116 (ip->i_diflags & XFS_DIFLAG_PREALLOC);
1117
1118 if (xflags & FS_XFLAG_IMMUTABLE)
1119 di_flags |= XFS_DIFLAG_IMMUTABLE;
1120 if (xflags & FS_XFLAG_APPEND)
1121 di_flags |= XFS_DIFLAG_APPEND;
1122 if (xflags & FS_XFLAG_SYNC)
1123 di_flags |= XFS_DIFLAG_SYNC;
1124 if (xflags & FS_XFLAG_NOATIME)
1125 di_flags |= XFS_DIFLAG_NOATIME;
1126 if (xflags & FS_XFLAG_NODUMP)
1127 di_flags |= XFS_DIFLAG_NODUMP;
1128 if (xflags & FS_XFLAG_NODEFRAG)
1129 di_flags |= XFS_DIFLAG_NODEFRAG;
1130 if (xflags & FS_XFLAG_FILESTREAM)
1131 di_flags |= XFS_DIFLAG_FILESTREAM;
1132 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1133 if (xflags & FS_XFLAG_RTINHERIT)
1134 di_flags |= XFS_DIFLAG_RTINHERIT;
1135 if (xflags & FS_XFLAG_NOSYMLINKS)
1136 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1137 if (xflags & FS_XFLAG_EXTSZINHERIT)
1138 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1139 if (xflags & FS_XFLAG_PROJINHERIT)
1140 di_flags |= XFS_DIFLAG_PROJINHERIT;
1141 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1142 if (xflags & FS_XFLAG_REALTIME)
1143 di_flags |= XFS_DIFLAG_REALTIME;
1144 if (xflags & FS_XFLAG_EXTSIZE)
1145 di_flags |= XFS_DIFLAG_EXTSIZE;
1146 }
1147
1148 return di_flags;
1149 }
1150
1151 STATIC uint64_t
1152 xfs_flags2diflags2(
1153 struct xfs_inode *ip,
1154 unsigned int xflags)
1155 {
1156 uint64_t di_flags2 =
1157 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
1158 XFS_DIFLAG2_BIGTIME));
1159
1160 if (xflags & FS_XFLAG_DAX)
1161 di_flags2 |= XFS_DIFLAG2_DAX;
1162 if (xflags & FS_XFLAG_COWEXTSIZE)
1163 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1164
1165 return di_flags2;
1166 }
1167
1168 static int
1169 xfs_ioctl_setattr_xflags(
1170 struct xfs_trans *tp,
1171 struct xfs_inode *ip,
1172 struct fileattr *fa)
1173 {
1174 struct xfs_mount *mp = ip->i_mount;
1175 uint64_t i_flags2;
1176
1177 /* Can't change realtime flag if any extents are allocated. */
1178 if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
1179 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1180 return -EINVAL;
1181
1182 /* If realtime flag is set then must have realtime device */
1183 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1184 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1185 (ip->i_extsize % mp->m_sb.sb_rextsize))
1186 return -EINVAL;
1187 }
1188
1189 /* Clear reflink if we are actually able to set the rt flag. */
1190 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1191 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
1192
1193 /* Don't allow us to set DAX mode for a reflinked file for now. */
1194 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1195 return -EINVAL;
1196
1197 /* diflags2 only valid for v3 inodes. */
1198 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1199 if (i_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb))
1200 return -EINVAL;
1201
1202 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1203 ip->i_diflags2 = i_flags2;
1204
1205 xfs_diflags_to_iflags(ip, false);
1206 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1207 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1208 XFS_STATS_INC(mp, xs_ig_attrchg);
1209 return 0;
1210 }
1211
1212 static void
1213 xfs_ioctl_setattr_prepare_dax(
1214 struct xfs_inode *ip,
1215 struct fileattr *fa)
1216 {
1217 struct xfs_mount *mp = ip->i_mount;
1218 struct inode *inode = VFS_I(ip);
1219
1220 if (S_ISDIR(inode->i_mode))
1221 return;
1222
1223 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) ||
1224 (mp->m_flags & XFS_MOUNT_DAX_NEVER))
1225 return;
1226
1227 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1228 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
1229 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1230 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
1231 d_mark_dontcache(inode);
1232 }
1233
1234 /*
1235 * Set up the transaction structure for the setattr operation, checking that we
1236 * have permission to do so. On success, return a clean transaction and the
1237 * inode locked exclusively ready for further operation specific checks. On
1238 * failure, return an error without modifying or locking the inode.
1239 */
1240 static struct xfs_trans *
1241 xfs_ioctl_setattr_get_trans(
1242 struct xfs_inode *ip,
1243 struct xfs_dquot *pdqp)
1244 {
1245 struct xfs_mount *mp = ip->i_mount;
1246 struct xfs_trans *tp;
1247 int error = -EROFS;
1248
1249 if (mp->m_flags & XFS_MOUNT_RDONLY)
1250 goto out_error;
1251 error = -EIO;
1252 if (XFS_FORCED_SHUTDOWN(mp))
1253 goto out_error;
1254
1255 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
1256 capable(CAP_FOWNER), &tp);
1257 if (error)
1258 goto out_error;
1259
1260 if (mp->m_flags & XFS_MOUNT_WSYNC)
1261 xfs_trans_set_sync(tp);
1262
1263 return tp;
1264
1265 out_error:
1266 return ERR_PTR(error);
1267 }
1268
1269 /*
1270 * extent size hint validation is somewhat cumbersome. Rules are:
1271 *
1272 * 1. extent size hint is only valid for directories and regular files
1273 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1274 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1275 * 4. can only be changed on regular files if no extents are allocated
1276 * 5. can be changed on directories at any time
1277 * 6. extsize hint of 0 turns off hints, clears inode flags.
1278 * 7. Extent size must be a multiple of the appropriate block size.
1279 * 8. for non-realtime files, the extent size hint must be limited
1280 * to half the AG size to avoid alignment extending the extent beyond the
1281 * limits of the AG.
1282 *
1283 * Please keep this function in sync with xfs_scrub_inode_extsize.
1284 */
1285 static int
1286 xfs_ioctl_setattr_check_extsize(
1287 struct xfs_inode *ip,
1288 struct fileattr *fa)
1289 {
1290 struct xfs_mount *mp = ip->i_mount;
1291 xfs_extlen_t size;
1292 xfs_fsblock_t extsize_fsb;
1293
1294 if (!fa->fsx_valid)
1295 return 0;
1296
1297 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1298 ((ip->i_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1299 return -EINVAL;
1300
1301 if (fa->fsx_extsize == 0)
1302 return 0;
1303
1304 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1305 if (extsize_fsb > MAXEXTLEN)
1306 return -EINVAL;
1307
1308 if (XFS_IS_REALTIME_INODE(ip) ||
1309 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1310 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1311 } else {
1312 size = mp->m_sb.sb_blocksize;
1313 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1314 return -EINVAL;
1315 }
1316
1317 if (fa->fsx_extsize % size)
1318 return -EINVAL;
1319
1320 return 0;
1321 }
1322
1323 /*
1324 * CoW extent size hint validation rules are:
1325 *
1326 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1327 * The inode does not have to have any shared blocks, but it must be a v3.
1328 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1329 * for a directory, the hint is propagated to new files.
1330 * 3. Can be changed on files & directories at any time.
1331 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1332 * 5. Extent size must be a multiple of the appropriate block size.
1333 * 6. The extent size hint must be limited to half the AG size to avoid
1334 * alignment extending the extent beyond the limits of the AG.
1335 *
1336 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1337 */
1338 static int
1339 xfs_ioctl_setattr_check_cowextsize(
1340 struct xfs_inode *ip,
1341 struct fileattr *fa)
1342 {
1343 struct xfs_mount *mp = ip->i_mount;
1344 xfs_extlen_t size;
1345 xfs_fsblock_t cowextsize_fsb;
1346
1347 if (!fa->fsx_valid)
1348 return 0;
1349
1350 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1351 return 0;
1352
1353 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb))
1354 return -EINVAL;
1355
1356 if (fa->fsx_cowextsize == 0)
1357 return 0;
1358
1359 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1360 if (cowextsize_fsb > MAXEXTLEN)
1361 return -EINVAL;
1362
1363 size = mp->m_sb.sb_blocksize;
1364 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1365 return -EINVAL;
1366
1367 if (fa->fsx_cowextsize % size)
1368 return -EINVAL;
1369
1370 return 0;
1371 }
1372
1373 static int
1374 xfs_ioctl_setattr_check_projid(
1375 struct xfs_inode *ip,
1376 struct fileattr *fa)
1377 {
1378 if (!fa->fsx_valid)
1379 return 0;
1380
1381 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1382 if (fa->fsx_projid > (uint16_t)-1 &&
1383 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1384 return -EINVAL;
1385 return 0;
1386 }
1387
1388 int
1389 xfs_fileattr_set(
1390 struct user_namespace *mnt_userns,
1391 struct dentry *dentry,
1392 struct fileattr *fa)
1393 {
1394 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1395 struct xfs_mount *mp = ip->i_mount;
1396 struct xfs_trans *tp;
1397 struct xfs_dquot *pdqp = NULL;
1398 struct xfs_dquot *olddquot = NULL;
1399 int error;
1400
1401 trace_xfs_ioctl_setattr(ip);
1402
1403 if (d_is_special(dentry))
1404 return -ENOTTY;
1405
1406 if (!fa->fsx_valid) {
1407 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1408 FS_NOATIME_FL | FS_NODUMP_FL |
1409 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1410 return -EOPNOTSUPP;
1411 }
1412
1413 error = xfs_ioctl_setattr_check_projid(ip, fa);
1414 if (error)
1415 return error;
1416
1417 /*
1418 * If disk quotas is on, we make sure that the dquots do exist on disk,
1419 * before we start any other transactions. Trying to do this later
1420 * is messy. We don't care to take a readlock to look at the ids
1421 * in inode here, because we can't hold it across the trans_reserve.
1422 * If the IDs do change before we take the ilock, we're covered
1423 * because the i_*dquot fields will get updated anyway.
1424 */
1425 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
1426 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1427 VFS_I(ip)->i_gid, fa->fsx_projid,
1428 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1429 if (error)
1430 return error;
1431 }
1432
1433 xfs_ioctl_setattr_prepare_dax(ip, fa);
1434
1435 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
1436 if (IS_ERR(tp)) {
1437 error = PTR_ERR(tp);
1438 goto error_free_dquots;
1439 }
1440
1441 error = xfs_ioctl_setattr_check_extsize(ip, fa);
1442 if (error)
1443 goto error_trans_cancel;
1444
1445 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1446 if (error)
1447 goto error_trans_cancel;
1448
1449 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1450 if (error)
1451 goto error_trans_cancel;
1452
1453 if (!fa->fsx_valid)
1454 goto skip_xattr;
1455 /*
1456 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1457 * overrides the following restrictions:
1458 *
1459 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1460 * successful return from chown()
1461 */
1462
1463 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1464 !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID))
1465 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1466
1467 /* Change the ownerships and register project quota modifications */
1468 if (ip->i_projid != fa->fsx_projid) {
1469 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1470 olddquot = xfs_qm_vop_chown(tp, ip,
1471 &ip->i_pdquot, pdqp);
1472 }
1473 ip->i_projid = fa->fsx_projid;
1474 }
1475
1476 /*
1477 * Only set the extent size hint if we've already determined that the
1478 * extent size hint should be set on the inode. If no extent size flags
1479 * are set on the inode then unconditionally clear the extent size hint.
1480 */
1481 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1482 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1483 else
1484 ip->i_extsize = 0;
1485
1486 if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
1487 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1488 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1489 else
1490 ip->i_cowextsize = 0;
1491 }
1492
1493 skip_xattr:
1494 error = xfs_trans_commit(tp);
1495
1496 /*
1497 * Release any dquot(s) the inode had kept before chown.
1498 */
1499 xfs_qm_dqrele(olddquot);
1500 xfs_qm_dqrele(pdqp);
1501
1502 return error;
1503
1504 error_trans_cancel:
1505 xfs_trans_cancel(tp);
1506 error_free_dquots:
1507 xfs_qm_dqrele(pdqp);
1508 return error;
1509 }
1510
1511 static bool
1512 xfs_getbmap_format(
1513 struct kgetbmap *p,
1514 struct getbmapx __user *u,
1515 size_t recsize)
1516 {
1517 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1518 put_user(p->bmv_block, &u->bmv_block) ||
1519 put_user(p->bmv_length, &u->bmv_length) ||
1520 put_user(0, &u->bmv_count) ||
1521 put_user(0, &u->bmv_entries))
1522 return false;
1523 if (recsize < sizeof(struct getbmapx))
1524 return true;
1525 if (put_user(0, &u->bmv_iflags) ||
1526 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1527 put_user(0, &u->bmv_unused1) ||
1528 put_user(0, &u->bmv_unused2))
1529 return false;
1530 return true;
1531 }
1532
1533 STATIC int
1534 xfs_ioc_getbmap(
1535 struct file *file,
1536 unsigned int cmd,
1537 void __user *arg)
1538 {
1539 struct getbmapx bmx = { 0 };
1540 struct kgetbmap *buf;
1541 size_t recsize;
1542 int error, i;
1543
1544 switch (cmd) {
1545 case XFS_IOC_GETBMAPA:
1546 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1547 /*FALLTHRU*/
1548 case XFS_IOC_GETBMAP:
1549 /* struct getbmap is a strict subset of struct getbmapx. */
1550 recsize = sizeof(struct getbmap);
1551 break;
1552 case XFS_IOC_GETBMAPX:
1553 recsize = sizeof(struct getbmapx);
1554 break;
1555 default:
1556 return -EINVAL;
1557 }
1558
1559 if (copy_from_user(&bmx, arg, recsize))
1560 return -EFAULT;
1561
1562 if (bmx.bmv_count < 2)
1563 return -EINVAL;
1564 if (bmx.bmv_count > ULONG_MAX / recsize)
1565 return -ENOMEM;
1566
1567 buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL);
1568 if (!buf)
1569 return -ENOMEM;
1570
1571 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1572 if (error)
1573 goto out_free_buf;
1574
1575 error = -EFAULT;
1576 if (copy_to_user(arg, &bmx, recsize))
1577 goto out_free_buf;
1578 arg += recsize;
1579
1580 for (i = 0; i < bmx.bmv_entries; i++) {
1581 if (!xfs_getbmap_format(buf + i, arg, recsize))
1582 goto out_free_buf;
1583 arg += recsize;
1584 }
1585
1586 error = 0;
1587 out_free_buf:
1588 kmem_free(buf);
1589 return error;
1590 }
1591
1592 STATIC int
1593 xfs_ioc_getfsmap(
1594 struct xfs_inode *ip,
1595 struct fsmap_head __user *arg)
1596 {
1597 struct xfs_fsmap_head xhead = {0};
1598 struct fsmap_head head;
1599 struct fsmap *recs;
1600 unsigned int count;
1601 __u32 last_flags = 0;
1602 bool done = false;
1603 int error;
1604
1605 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1606 return -EFAULT;
1607 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1608 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1609 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1610 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1611 sizeof(head.fmh_keys[1].fmr_reserved)))
1612 return -EINVAL;
1613
1614 /*
1615 * Use an internal memory buffer so that we don't have to copy fsmap
1616 * data to userspace while holding locks. Start by trying to allocate
1617 * up to 128k for the buffer, but fall back to a single page if needed.
1618 */
1619 count = min_t(unsigned int, head.fmh_count,
1620 131072 / sizeof(struct fsmap));
1621 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
1622 if (!recs) {
1623 count = min_t(unsigned int, head.fmh_count,
1624 PAGE_SIZE / sizeof(struct fsmap));
1625 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
1626 if (!recs)
1627 return -ENOMEM;
1628 }
1629
1630 xhead.fmh_iflags = head.fmh_iflags;
1631 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1632 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1633
1634 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1635 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1636
1637 head.fmh_entries = 0;
1638 do {
1639 struct fsmap __user *user_recs;
1640 struct fsmap *last_rec;
1641
1642 user_recs = &arg->fmh_recs[head.fmh_entries];
1643 xhead.fmh_entries = 0;
1644 xhead.fmh_count = min_t(unsigned int, count,
1645 head.fmh_count - head.fmh_entries);
1646
1647 /* Run query, record how many entries we got. */
1648 error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1649 switch (error) {
1650 case 0:
1651 /*
1652 * There are no more records in the result set. Copy
1653 * whatever we got to userspace and break out.
1654 */
1655 done = true;
1656 break;
1657 case -ECANCELED:
1658 /*
1659 * The internal memory buffer is full. Copy whatever
1660 * records we got to userspace and go again if we have
1661 * not yet filled the userspace buffer.
1662 */
1663 error = 0;
1664 break;
1665 default:
1666 goto out_free;
1667 }
1668 head.fmh_entries += xhead.fmh_entries;
1669 head.fmh_oflags = xhead.fmh_oflags;
1670
1671 /*
1672 * If the caller wanted a record count or there aren't any
1673 * new records to return, we're done.
1674 */
1675 if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1676 break;
1677
1678 /* Copy all the records we got out to userspace. */
1679 if (copy_to_user(user_recs, recs,
1680 xhead.fmh_entries * sizeof(struct fsmap))) {
1681 error = -EFAULT;
1682 goto out_free;
1683 }
1684
1685 /* Remember the last record flags we copied to userspace. */
1686 last_rec = &recs[xhead.fmh_entries - 1];
1687 last_flags = last_rec->fmr_flags;
1688
1689 /* Set up the low key for the next iteration. */
1690 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1691 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1692 } while (!done && head.fmh_entries < head.fmh_count);
1693
1694 /*
1695 * If there are no more records in the query result set and we're not
1696 * in counting mode, mark the last record returned with the LAST flag.
1697 */
1698 if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1699 struct fsmap __user *user_rec;
1700
1701 last_flags |= FMR_OF_LAST;
1702 user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1703
1704 if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1705 sizeof(last_flags))) {
1706 error = -EFAULT;
1707 goto out_free;
1708 }
1709 }
1710
1711 /* copy back header */
1712 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1713 error = -EFAULT;
1714 goto out_free;
1715 }
1716
1717 out_free:
1718 kmem_free(recs);
1719 return error;
1720 }
1721
1722 STATIC int
1723 xfs_ioc_scrub_metadata(
1724 struct file *file,
1725 void __user *arg)
1726 {
1727 struct xfs_scrub_metadata scrub;
1728 int error;
1729
1730 if (!capable(CAP_SYS_ADMIN))
1731 return -EPERM;
1732
1733 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1734 return -EFAULT;
1735
1736 error = xfs_scrub_metadata(file, &scrub);
1737 if (error)
1738 return error;
1739
1740 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1741 return -EFAULT;
1742
1743 return 0;
1744 }
1745
1746 int
1747 xfs_ioc_swapext(
1748 xfs_swapext_t *sxp)
1749 {
1750 xfs_inode_t *ip, *tip;
1751 struct fd f, tmp;
1752 int error = 0;
1753
1754 /* Pull information for the target fd */
1755 f = fdget((int)sxp->sx_fdtarget);
1756 if (!f.file) {
1757 error = -EINVAL;
1758 goto out;
1759 }
1760
1761 if (!(f.file->f_mode & FMODE_WRITE) ||
1762 !(f.file->f_mode & FMODE_READ) ||
1763 (f.file->f_flags & O_APPEND)) {
1764 error = -EBADF;
1765 goto out_put_file;
1766 }
1767
1768 tmp = fdget((int)sxp->sx_fdtmp);
1769 if (!tmp.file) {
1770 error = -EINVAL;
1771 goto out_put_file;
1772 }
1773
1774 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1775 !(tmp.file->f_mode & FMODE_READ) ||
1776 (tmp.file->f_flags & O_APPEND)) {
1777 error = -EBADF;
1778 goto out_put_tmp_file;
1779 }
1780
1781 if (IS_SWAPFILE(file_inode(f.file)) ||
1782 IS_SWAPFILE(file_inode(tmp.file))) {
1783 error = -EINVAL;
1784 goto out_put_tmp_file;
1785 }
1786
1787 /*
1788 * We need to ensure that the fds passed in point to XFS inodes
1789 * before we cast and access them as XFS structures as we have no
1790 * control over what the user passes us here.
1791 */
1792 if (f.file->f_op != &xfs_file_operations ||
1793 tmp.file->f_op != &xfs_file_operations) {
1794 error = -EINVAL;
1795 goto out_put_tmp_file;
1796 }
1797
1798 ip = XFS_I(file_inode(f.file));
1799 tip = XFS_I(file_inode(tmp.file));
1800
1801 if (ip->i_mount != tip->i_mount) {
1802 error = -EINVAL;
1803 goto out_put_tmp_file;
1804 }
1805
1806 if (ip->i_ino == tip->i_ino) {
1807 error = -EINVAL;
1808 goto out_put_tmp_file;
1809 }
1810
1811 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1812 error = -EIO;
1813 goto out_put_tmp_file;
1814 }
1815
1816 error = xfs_swap_extents(ip, tip, sxp);
1817
1818 out_put_tmp_file:
1819 fdput(tmp);
1820 out_put_file:
1821 fdput(f);
1822 out:
1823 return error;
1824 }
1825
1826 static int
1827 xfs_ioc_getlabel(
1828 struct xfs_mount *mp,
1829 char __user *user_label)
1830 {
1831 struct xfs_sb *sbp = &mp->m_sb;
1832 char label[XFSLABEL_MAX + 1];
1833
1834 /* Paranoia */
1835 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1836
1837 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1838 memset(label, 0, sizeof(label));
1839 spin_lock(&mp->m_sb_lock);
1840 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1841 spin_unlock(&mp->m_sb_lock);
1842
1843 if (copy_to_user(user_label, label, sizeof(label)))
1844 return -EFAULT;
1845 return 0;
1846 }
1847
1848 static int
1849 xfs_ioc_setlabel(
1850 struct file *filp,
1851 struct xfs_mount *mp,
1852 char __user *newlabel)
1853 {
1854 struct xfs_sb *sbp = &mp->m_sb;
1855 char label[XFSLABEL_MAX + 1];
1856 size_t len;
1857 int error;
1858
1859 if (!capable(CAP_SYS_ADMIN))
1860 return -EPERM;
1861 /*
1862 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1863 * smaller, at 12 bytes. We copy one more to be sure we find the
1864 * (required) NULL character to test the incoming label length.
1865 * NB: The on disk label doesn't need to be null terminated.
1866 */
1867 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1868 return -EFAULT;
1869 len = strnlen(label, XFSLABEL_MAX + 1);
1870 if (len > sizeof(sbp->sb_fname))
1871 return -EINVAL;
1872
1873 error = mnt_want_write_file(filp);
1874 if (error)
1875 return error;
1876
1877 spin_lock(&mp->m_sb_lock);
1878 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1879 memcpy(sbp->sb_fname, label, len);
1880 spin_unlock(&mp->m_sb_lock);
1881
1882 /*
1883 * Now we do several things to satisfy userspace.
1884 * In addition to normal logging of the primary superblock, we also
1885 * immediately write these changes to sector zero for the primary, then
1886 * update all backup supers (as xfs_db does for a label change), then
1887 * invalidate the block device page cache. This is so that any prior
1888 * buffered reads from userspace (i.e. from blkid) are invalidated,
1889 * and userspace will see the newly-written label.
1890 */
1891 error = xfs_sync_sb_buf(mp);
1892 if (error)
1893 goto out;
1894 /*
1895 * growfs also updates backup supers so lock against that.
1896 */
1897 mutex_lock(&mp->m_growlock);
1898 error = xfs_update_secondary_sbs(mp);
1899 mutex_unlock(&mp->m_growlock);
1900
1901 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1902
1903 out:
1904 mnt_drop_write_file(filp);
1905 return error;
1906 }
1907
1908 static inline int
1909 xfs_fs_eofblocks_from_user(
1910 struct xfs_fs_eofblocks *src,
1911 struct xfs_eofblocks *dst)
1912 {
1913 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1914 return -EINVAL;
1915
1916 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1917 return -EINVAL;
1918
1919 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1920 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1921 return -EINVAL;
1922
1923 dst->eof_flags = src->eof_flags;
1924 dst->eof_prid = src->eof_prid;
1925 dst->eof_min_file_size = src->eof_min_file_size;
1926
1927 dst->eof_uid = INVALID_UID;
1928 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1929 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid);
1930 if (!uid_valid(dst->eof_uid))
1931 return -EINVAL;
1932 }
1933
1934 dst->eof_gid = INVALID_GID;
1935 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1936 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid);
1937 if (!gid_valid(dst->eof_gid))
1938 return -EINVAL;
1939 }
1940 return 0;
1941 }
1942
1943 /*
1944 * Note: some of the ioctl's return positive numbers as a
1945 * byte count indicating success, such as readlink_by_handle.
1946 * So we don't "sign flip" like most other routines. This means
1947 * true errors need to be returned as a negative value.
1948 */
1949 long
1950 xfs_file_ioctl(
1951 struct file *filp,
1952 unsigned int cmd,
1953 unsigned long p)
1954 {
1955 struct inode *inode = file_inode(filp);
1956 struct xfs_inode *ip = XFS_I(inode);
1957 struct xfs_mount *mp = ip->i_mount;
1958 void __user *arg = (void __user *)p;
1959 int error;
1960
1961 trace_xfs_file_ioctl(ip);
1962
1963 switch (cmd) {
1964 case FITRIM:
1965 return xfs_ioc_trim(mp, arg);
1966 case FS_IOC_GETFSLABEL:
1967 return xfs_ioc_getlabel(mp, arg);
1968 case FS_IOC_SETFSLABEL:
1969 return xfs_ioc_setlabel(filp, mp, arg);
1970 case XFS_IOC_ALLOCSP:
1971 case XFS_IOC_FREESP:
1972 case XFS_IOC_ALLOCSP64:
1973 case XFS_IOC_FREESP64: {
1974 xfs_flock64_t bf;
1975
1976 if (copy_from_user(&bf, arg, sizeof(bf)))
1977 return -EFAULT;
1978 return xfs_ioc_space(filp, &bf);
1979 }
1980 case XFS_IOC_DIOINFO: {
1981 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1982 struct dioattr da;
1983
1984 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1985 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1986
1987 if (copy_to_user(arg, &da, sizeof(da)))
1988 return -EFAULT;
1989 return 0;
1990 }
1991
1992 case XFS_IOC_FSBULKSTAT_SINGLE:
1993 case XFS_IOC_FSBULKSTAT:
1994 case XFS_IOC_FSINUMBERS:
1995 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1996
1997 case XFS_IOC_BULKSTAT:
1998 return xfs_ioc_bulkstat(filp, cmd, arg);
1999 case XFS_IOC_INUMBERS:
2000 return xfs_ioc_inumbers(mp, cmd, arg);
2001
2002 case XFS_IOC_FSGEOMETRY_V1:
2003 return xfs_ioc_fsgeometry(mp, arg, 3);
2004 case XFS_IOC_FSGEOMETRY_V4:
2005 return xfs_ioc_fsgeometry(mp, arg, 4);
2006 case XFS_IOC_FSGEOMETRY:
2007 return xfs_ioc_fsgeometry(mp, arg, 5);
2008
2009 case XFS_IOC_AG_GEOMETRY:
2010 return xfs_ioc_ag_geometry(mp, arg);
2011
2012 case XFS_IOC_GETVERSION:
2013 return put_user(inode->i_generation, (int __user *)arg);
2014
2015 case XFS_IOC_FSGETXATTRA:
2016 return xfs_ioc_fsgetxattra(ip, arg);
2017
2018 case XFS_IOC_GETBMAP:
2019 case XFS_IOC_GETBMAPA:
2020 case XFS_IOC_GETBMAPX:
2021 return xfs_ioc_getbmap(filp, cmd, arg);
2022
2023 case FS_IOC_GETFSMAP:
2024 return xfs_ioc_getfsmap(ip, arg);
2025
2026 case XFS_IOC_SCRUB_METADATA:
2027 return xfs_ioc_scrub_metadata(filp, arg);
2028
2029 case XFS_IOC_FD_TO_HANDLE:
2030 case XFS_IOC_PATH_TO_HANDLE:
2031 case XFS_IOC_PATH_TO_FSHANDLE: {
2032 xfs_fsop_handlereq_t hreq;
2033
2034 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2035 return -EFAULT;
2036 return xfs_find_handle(cmd, &hreq);
2037 }
2038 case XFS_IOC_OPEN_BY_HANDLE: {
2039 xfs_fsop_handlereq_t hreq;
2040
2041 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2042 return -EFAULT;
2043 return xfs_open_by_handle(filp, &hreq);
2044 }
2045
2046 case XFS_IOC_READLINK_BY_HANDLE: {
2047 xfs_fsop_handlereq_t hreq;
2048
2049 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2050 return -EFAULT;
2051 return xfs_readlink_by_handle(filp, &hreq);
2052 }
2053 case XFS_IOC_ATTRLIST_BY_HANDLE:
2054 return xfs_attrlist_by_handle(filp, arg);
2055
2056 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2057 return xfs_attrmulti_by_handle(filp, arg);
2058
2059 case XFS_IOC_SWAPEXT: {
2060 struct xfs_swapext sxp;
2061
2062 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2063 return -EFAULT;
2064 error = mnt_want_write_file(filp);
2065 if (error)
2066 return error;
2067 error = xfs_ioc_swapext(&sxp);
2068 mnt_drop_write_file(filp);
2069 return error;
2070 }
2071
2072 case XFS_IOC_FSCOUNTS: {
2073 xfs_fsop_counts_t out;
2074
2075 xfs_fs_counts(mp, &out);
2076
2077 if (copy_to_user(arg, &out, sizeof(out)))
2078 return -EFAULT;
2079 return 0;
2080 }
2081
2082 case XFS_IOC_SET_RESBLKS: {
2083 xfs_fsop_resblks_t inout;
2084 uint64_t in;
2085
2086 if (!capable(CAP_SYS_ADMIN))
2087 return -EPERM;
2088
2089 if (mp->m_flags & XFS_MOUNT_RDONLY)
2090 return -EROFS;
2091
2092 if (copy_from_user(&inout, arg, sizeof(inout)))
2093 return -EFAULT;
2094
2095 error = mnt_want_write_file(filp);
2096 if (error)
2097 return error;
2098
2099 /* input parameter is passed in resblks field of structure */
2100 in = inout.resblks;
2101 error = xfs_reserve_blocks(mp, &in, &inout);
2102 mnt_drop_write_file(filp);
2103 if (error)
2104 return error;
2105
2106 if (copy_to_user(arg, &inout, sizeof(inout)))
2107 return -EFAULT;
2108 return 0;
2109 }
2110
2111 case XFS_IOC_GET_RESBLKS: {
2112 xfs_fsop_resblks_t out;
2113
2114 if (!capable(CAP_SYS_ADMIN))
2115 return -EPERM;
2116
2117 error = xfs_reserve_blocks(mp, NULL, &out);
2118 if (error)
2119 return error;
2120
2121 if (copy_to_user(arg, &out, sizeof(out)))
2122 return -EFAULT;
2123
2124 return 0;
2125 }
2126
2127 case XFS_IOC_FSGROWFSDATA: {
2128 struct xfs_growfs_data in;
2129
2130 if (copy_from_user(&in, arg, sizeof(in)))
2131 return -EFAULT;
2132
2133 error = mnt_want_write_file(filp);
2134 if (error)
2135 return error;
2136 error = xfs_growfs_data(mp, &in);
2137 mnt_drop_write_file(filp);
2138 return error;
2139 }
2140
2141 case XFS_IOC_FSGROWFSLOG: {
2142 struct xfs_growfs_log in;
2143
2144 if (copy_from_user(&in, arg, sizeof(in)))
2145 return -EFAULT;
2146
2147 error = mnt_want_write_file(filp);
2148 if (error)
2149 return error;
2150 error = xfs_growfs_log(mp, &in);
2151 mnt_drop_write_file(filp);
2152 return error;
2153 }
2154
2155 case XFS_IOC_FSGROWFSRT: {
2156 xfs_growfs_rt_t in;
2157
2158 if (copy_from_user(&in, arg, sizeof(in)))
2159 return -EFAULT;
2160
2161 error = mnt_want_write_file(filp);
2162 if (error)
2163 return error;
2164 error = xfs_growfs_rt(mp, &in);
2165 mnt_drop_write_file(filp);
2166 return error;
2167 }
2168
2169 case XFS_IOC_GOINGDOWN: {
2170 uint32_t in;
2171
2172 if (!capable(CAP_SYS_ADMIN))
2173 return -EPERM;
2174
2175 if (get_user(in, (uint32_t __user *)arg))
2176 return -EFAULT;
2177
2178 return xfs_fs_goingdown(mp, in);
2179 }
2180
2181 case XFS_IOC_ERROR_INJECTION: {
2182 xfs_error_injection_t in;
2183
2184 if (!capable(CAP_SYS_ADMIN))
2185 return -EPERM;
2186
2187 if (copy_from_user(&in, arg, sizeof(in)))
2188 return -EFAULT;
2189
2190 return xfs_errortag_add(mp, in.errtag);
2191 }
2192
2193 case XFS_IOC_ERROR_CLEARALL:
2194 if (!capable(CAP_SYS_ADMIN))
2195 return -EPERM;
2196
2197 return xfs_errortag_clearall(mp);
2198
2199 case XFS_IOC_FREE_EOFBLOCKS: {
2200 struct xfs_fs_eofblocks eofb;
2201 struct xfs_eofblocks keofb;
2202
2203 if (!capable(CAP_SYS_ADMIN))
2204 return -EPERM;
2205
2206 if (mp->m_flags & XFS_MOUNT_RDONLY)
2207 return -EROFS;
2208
2209 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2210 return -EFAULT;
2211
2212 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2213 if (error)
2214 return error;
2215
2216 trace_xfs_ioc_free_eofblocks(mp, &keofb, _RET_IP_);
2217
2218 sb_start_write(mp->m_super);
2219 error = xfs_blockgc_free_space(mp, &keofb);
2220 sb_end_write(mp->m_super);
2221 return error;
2222 }
2223
2224 default:
2225 return -ENOTTY;
2226 }
2227 }
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