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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 */
56int
57xfs_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 */
133STATIC int
134xfs_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 */
144struct dentry *
145xfs_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
176STATIC struct dentry *
177xfs_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
184int
185xfs_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
264int
265xfs_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 */
303static void
304xfs_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
349static unsigned int
350xfs_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
360static unsigned int
361xfs_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
371int
372xfs_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;
435out_free:
436 kmem_free(buffer);
437 return error;
438}
439
440STATIC int
441xfs_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
464static int
465xfs_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
493out_kfree:
494 kmem_free(args.value);
495 return error;
496}
497
498static int
499xfs_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
534int
535xfs_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 fallthrough;
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
578STATIC int
579xfs_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
630int
631xfs_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
704out_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 */
711int
712xfs_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
724int
725xfs_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
737STATIC int
738xfs_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 */
817static int
818xfs_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 */
833static int
834xfs_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 */
903static void
904xfs_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. */
913STATIC int
914xfs_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
946out_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
954STATIC int
955xfs_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. */
965STATIC int
966xfs_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
996out_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
1004STATIC int
1005xfs_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
1029STATIC int
1030xfs_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
1057static void
1058xfs_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 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
1069 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1070 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
1071 /*
1072 * Don't let a misaligned extent size hint on a directory
1073 * escape to userspace if it won't pass the setattr checks
1074 * later.
1075 */
1076 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
1077 ip->i_extsize % mp->m_sb.sb_rextsize > 0) {
1078 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
1079 FS_XFLAG_EXTSZINHERIT);
1080 fa->fsx_extsize = 0;
1081 } else {
1082 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1083 }
1084 }
1085
1086 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1087 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
1088 fa->fsx_projid = ip->i_projid;
1089 if (ifp && !xfs_need_iread_extents(ifp))
1090 fa->fsx_nextents = xfs_iext_count(ifp);
1091 else
1092 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1093}
1094
1095STATIC int
1096xfs_ioc_fsgetxattra(
1097 xfs_inode_t *ip,
1098 void __user *arg)
1099{
1100 struct fileattr fa;
1101
1102 xfs_ilock(ip, XFS_ILOCK_SHARED);
1103 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
1104 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1105
1106 return copy_fsxattr_to_user(&fa, arg);
1107}
1108
1109int
1110xfs_fileattr_get(
1111 struct dentry *dentry,
1112 struct fileattr *fa)
1113{
1114 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1115
1116 if (d_is_special(dentry))
1117 return -ENOTTY;
1118
1119 xfs_ilock(ip, XFS_ILOCK_SHARED);
1120 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
1121 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1122
1123 return 0;
1124}
1125
1126STATIC uint16_t
1127xfs_flags2diflags(
1128 struct xfs_inode *ip,
1129 unsigned int xflags)
1130{
1131 /* can't set PREALLOC this way, just preserve it */
1132 uint16_t di_flags =
1133 (ip->i_diflags & XFS_DIFLAG_PREALLOC);
1134
1135 if (xflags & FS_XFLAG_IMMUTABLE)
1136 di_flags |= XFS_DIFLAG_IMMUTABLE;
1137 if (xflags & FS_XFLAG_APPEND)
1138 di_flags |= XFS_DIFLAG_APPEND;
1139 if (xflags & FS_XFLAG_SYNC)
1140 di_flags |= XFS_DIFLAG_SYNC;
1141 if (xflags & FS_XFLAG_NOATIME)
1142 di_flags |= XFS_DIFLAG_NOATIME;
1143 if (xflags & FS_XFLAG_NODUMP)
1144 di_flags |= XFS_DIFLAG_NODUMP;
1145 if (xflags & FS_XFLAG_NODEFRAG)
1146 di_flags |= XFS_DIFLAG_NODEFRAG;
1147 if (xflags & FS_XFLAG_FILESTREAM)
1148 di_flags |= XFS_DIFLAG_FILESTREAM;
1149 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1150 if (xflags & FS_XFLAG_RTINHERIT)
1151 di_flags |= XFS_DIFLAG_RTINHERIT;
1152 if (xflags & FS_XFLAG_NOSYMLINKS)
1153 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1154 if (xflags & FS_XFLAG_EXTSZINHERIT)
1155 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1156 if (xflags & FS_XFLAG_PROJINHERIT)
1157 di_flags |= XFS_DIFLAG_PROJINHERIT;
1158 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1159 if (xflags & FS_XFLAG_REALTIME)
1160 di_flags |= XFS_DIFLAG_REALTIME;
1161 if (xflags & FS_XFLAG_EXTSIZE)
1162 di_flags |= XFS_DIFLAG_EXTSIZE;
1163 }
1164
1165 return di_flags;
1166}
1167
1168STATIC uint64_t
1169xfs_flags2diflags2(
1170 struct xfs_inode *ip,
1171 unsigned int xflags)
1172{
1173 uint64_t di_flags2 =
1174 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
1175 XFS_DIFLAG2_BIGTIME));
1176
1177 if (xflags & FS_XFLAG_DAX)
1178 di_flags2 |= XFS_DIFLAG2_DAX;
1179 if (xflags & FS_XFLAG_COWEXTSIZE)
1180 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1181
1182 return di_flags2;
1183}
1184
1185static int
1186xfs_ioctl_setattr_xflags(
1187 struct xfs_trans *tp,
1188 struct xfs_inode *ip,
1189 struct fileattr *fa)
1190{
1191 struct xfs_mount *mp = ip->i_mount;
1192 uint64_t i_flags2;
1193
1194 /* Can't change realtime flag if any extents are allocated. */
1195 if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
1196 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1197 return -EINVAL;
1198
1199 /* If realtime flag is set then must have realtime device */
1200 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1201 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1202 (ip->i_extsize % mp->m_sb.sb_rextsize))
1203 return -EINVAL;
1204 }
1205
1206 /* Clear reflink if we are actually able to set the rt flag. */
1207 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1208 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
1209
1210 /* Don't allow us to set DAX mode for a reflinked file for now. */
1211 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1212 return -EINVAL;
1213
1214 /* diflags2 only valid for v3 inodes. */
1215 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1216 if (i_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb))
1217 return -EINVAL;
1218
1219 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1220 ip->i_diflags2 = i_flags2;
1221
1222 xfs_diflags_to_iflags(ip, false);
1223 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1224 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1225 XFS_STATS_INC(mp, xs_ig_attrchg);
1226 return 0;
1227}
1228
1229static void
1230xfs_ioctl_setattr_prepare_dax(
1231 struct xfs_inode *ip,
1232 struct fileattr *fa)
1233{
1234 struct xfs_mount *mp = ip->i_mount;
1235 struct inode *inode = VFS_I(ip);
1236
1237 if (S_ISDIR(inode->i_mode))
1238 return;
1239
1240 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) ||
1241 (mp->m_flags & XFS_MOUNT_DAX_NEVER))
1242 return;
1243
1244 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1245 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
1246 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1247 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
1248 d_mark_dontcache(inode);
1249}
1250
1251/*
1252 * Set up the transaction structure for the setattr operation, checking that we
1253 * have permission to do so. On success, return a clean transaction and the
1254 * inode locked exclusively ready for further operation specific checks. On
1255 * failure, return an error without modifying or locking the inode.
1256 */
1257static struct xfs_trans *
1258xfs_ioctl_setattr_get_trans(
1259 struct xfs_inode *ip,
1260 struct xfs_dquot *pdqp)
1261{
1262 struct xfs_mount *mp = ip->i_mount;
1263 struct xfs_trans *tp;
1264 int error = -EROFS;
1265
1266 if (mp->m_flags & XFS_MOUNT_RDONLY)
1267 goto out_error;
1268 error = -EIO;
1269 if (XFS_FORCED_SHUTDOWN(mp))
1270 goto out_error;
1271
1272 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
1273 capable(CAP_FOWNER), &tp);
1274 if (error)
1275 goto out_error;
1276
1277 if (mp->m_flags & XFS_MOUNT_WSYNC)
1278 xfs_trans_set_sync(tp);
1279
1280 return tp;
1281
1282out_error:
1283 return ERR_PTR(error);
1284}
1285
1286/*
1287 * Validate a proposed extent size hint. For regular files, the hint can only
1288 * be changed if no extents are allocated.
1289 */
1290static int
1291xfs_ioctl_setattr_check_extsize(
1292 struct xfs_inode *ip,
1293 struct fileattr *fa)
1294{
1295 struct xfs_mount *mp = ip->i_mount;
1296 xfs_failaddr_t failaddr;
1297 uint16_t new_diflags;
1298
1299 if (!fa->fsx_valid)
1300 return 0;
1301
1302 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1303 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
1304 return -EINVAL;
1305
1306 if (fa->fsx_extsize & mp->m_blockmask)
1307 return -EINVAL;
1308
1309 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1310
1311 /*
1312 * Inode verifiers do not check that the extent size hint is an integer
1313 * multiple of the rt extent size on a directory with both rtinherit
1314 * and extszinherit flags set. Don't let sysadmins misconfigure
1315 * directories.
1316 */
1317 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
1318 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
1319 unsigned int rtextsize_bytes;
1320
1321 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
1322 if (fa->fsx_extsize % rtextsize_bytes)
1323 return -EINVAL;
1324 }
1325
1326 failaddr = xfs_inode_validate_extsize(ip->i_mount,
1327 XFS_B_TO_FSB(mp, fa->fsx_extsize),
1328 VFS_I(ip)->i_mode, new_diflags);
1329 return failaddr != NULL ? -EINVAL : 0;
1330}
1331
1332static int
1333xfs_ioctl_setattr_check_cowextsize(
1334 struct xfs_inode *ip,
1335 struct fileattr *fa)
1336{
1337 struct xfs_mount *mp = ip->i_mount;
1338 xfs_failaddr_t failaddr;
1339 uint64_t new_diflags2;
1340 uint16_t new_diflags;
1341
1342 if (!fa->fsx_valid)
1343 return 0;
1344
1345 if (fa->fsx_cowextsize & mp->m_blockmask)
1346 return -EINVAL;
1347
1348 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1349 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1350
1351 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
1352 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
1353 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
1354 return failaddr != NULL ? -EINVAL : 0;
1355}
1356
1357static int
1358xfs_ioctl_setattr_check_projid(
1359 struct xfs_inode *ip,
1360 struct fileattr *fa)
1361{
1362 if (!fa->fsx_valid)
1363 return 0;
1364
1365 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1366 if (fa->fsx_projid > (uint16_t)-1 &&
1367 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1368 return -EINVAL;
1369 return 0;
1370}
1371
1372int
1373xfs_fileattr_set(
1374 struct user_namespace *mnt_userns,
1375 struct dentry *dentry,
1376 struct fileattr *fa)
1377{
1378 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1379 struct xfs_mount *mp = ip->i_mount;
1380 struct xfs_trans *tp;
1381 struct xfs_dquot *pdqp = NULL;
1382 struct xfs_dquot *olddquot = NULL;
1383 int error;
1384
1385 trace_xfs_ioctl_setattr(ip);
1386
1387 if (d_is_special(dentry))
1388 return -ENOTTY;
1389
1390 if (!fa->fsx_valid) {
1391 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1392 FS_NOATIME_FL | FS_NODUMP_FL |
1393 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1394 return -EOPNOTSUPP;
1395 }
1396
1397 error = xfs_ioctl_setattr_check_projid(ip, fa);
1398 if (error)
1399 return error;
1400
1401 /*
1402 * If disk quotas is on, we make sure that the dquots do exist on disk,
1403 * before we start any other transactions. Trying to do this later
1404 * is messy. We don't care to take a readlock to look at the ids
1405 * in inode here, because we can't hold it across the trans_reserve.
1406 * If the IDs do change before we take the ilock, we're covered
1407 * because the i_*dquot fields will get updated anyway.
1408 */
1409 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
1410 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1411 VFS_I(ip)->i_gid, fa->fsx_projid,
1412 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1413 if (error)
1414 return error;
1415 }
1416
1417 xfs_ioctl_setattr_prepare_dax(ip, fa);
1418
1419 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
1420 if (IS_ERR(tp)) {
1421 error = PTR_ERR(tp);
1422 goto error_free_dquots;
1423 }
1424
1425 error = xfs_ioctl_setattr_check_extsize(ip, fa);
1426 if (error)
1427 goto error_trans_cancel;
1428
1429 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1430 if (error)
1431 goto error_trans_cancel;
1432
1433 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1434 if (error)
1435 goto error_trans_cancel;
1436
1437 if (!fa->fsx_valid)
1438 goto skip_xattr;
1439 /*
1440 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1441 * overrides the following restrictions:
1442 *
1443 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1444 * successful return from chown()
1445 */
1446
1447 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1448 !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID))
1449 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1450
1451 /* Change the ownerships and register project quota modifications */
1452 if (ip->i_projid != fa->fsx_projid) {
1453 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1454 olddquot = xfs_qm_vop_chown(tp, ip,
1455 &ip->i_pdquot, pdqp);
1456 }
1457 ip->i_projid = fa->fsx_projid;
1458 }
1459
1460 /*
1461 * Only set the extent size hint if we've already determined that the
1462 * extent size hint should be set on the inode. If no extent size flags
1463 * are set on the inode then unconditionally clear the extent size hint.
1464 */
1465 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1466 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1467 else
1468 ip->i_extsize = 0;
1469
1470 if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
1471 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1472 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1473 else
1474 ip->i_cowextsize = 0;
1475 }
1476
1477skip_xattr:
1478 error = xfs_trans_commit(tp);
1479
1480 /*
1481 * Release any dquot(s) the inode had kept before chown.
1482 */
1483 xfs_qm_dqrele(olddquot);
1484 xfs_qm_dqrele(pdqp);
1485
1486 return error;
1487
1488error_trans_cancel:
1489 xfs_trans_cancel(tp);
1490error_free_dquots:
1491 xfs_qm_dqrele(pdqp);
1492 return error;
1493}
1494
1495static bool
1496xfs_getbmap_format(
1497 struct kgetbmap *p,
1498 struct getbmapx __user *u,
1499 size_t recsize)
1500{
1501 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1502 put_user(p->bmv_block, &u->bmv_block) ||
1503 put_user(p->bmv_length, &u->bmv_length) ||
1504 put_user(0, &u->bmv_count) ||
1505 put_user(0, &u->bmv_entries))
1506 return false;
1507 if (recsize < sizeof(struct getbmapx))
1508 return true;
1509 if (put_user(0, &u->bmv_iflags) ||
1510 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1511 put_user(0, &u->bmv_unused1) ||
1512 put_user(0, &u->bmv_unused2))
1513 return false;
1514 return true;
1515}
1516
1517STATIC int
1518xfs_ioc_getbmap(
1519 struct file *file,
1520 unsigned int cmd,
1521 void __user *arg)
1522{
1523 struct getbmapx bmx = { 0 };
1524 struct kgetbmap *buf;
1525 size_t recsize;
1526 int error, i;
1527
1528 switch (cmd) {
1529 case XFS_IOC_GETBMAPA:
1530 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1531 fallthrough;
1532 case XFS_IOC_GETBMAP:
1533 /* struct getbmap is a strict subset of struct getbmapx. */
1534 recsize = sizeof(struct getbmap);
1535 break;
1536 case XFS_IOC_GETBMAPX:
1537 recsize = sizeof(struct getbmapx);
1538 break;
1539 default:
1540 return -EINVAL;
1541 }
1542
1543 if (copy_from_user(&bmx, arg, recsize))
1544 return -EFAULT;
1545
1546 if (bmx.bmv_count < 2)
1547 return -EINVAL;
1548 if (bmx.bmv_count > ULONG_MAX / recsize)
1549 return -ENOMEM;
1550
1551 buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL);
1552 if (!buf)
1553 return -ENOMEM;
1554
1555 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1556 if (error)
1557 goto out_free_buf;
1558
1559 error = -EFAULT;
1560 if (copy_to_user(arg, &bmx, recsize))
1561 goto out_free_buf;
1562 arg += recsize;
1563
1564 for (i = 0; i < bmx.bmv_entries; i++) {
1565 if (!xfs_getbmap_format(buf + i, arg, recsize))
1566 goto out_free_buf;
1567 arg += recsize;
1568 }
1569
1570 error = 0;
1571out_free_buf:
1572 kmem_free(buf);
1573 return error;
1574}
1575
1576STATIC int
1577xfs_ioc_getfsmap(
1578 struct xfs_inode *ip,
1579 struct fsmap_head __user *arg)
1580{
1581 struct xfs_fsmap_head xhead = {0};
1582 struct fsmap_head head;
1583 struct fsmap *recs;
1584 unsigned int count;
1585 __u32 last_flags = 0;
1586 bool done = false;
1587 int error;
1588
1589 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1590 return -EFAULT;
1591 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1592 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1593 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1594 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1595 sizeof(head.fmh_keys[1].fmr_reserved)))
1596 return -EINVAL;
1597
1598 /*
1599 * Use an internal memory buffer so that we don't have to copy fsmap
1600 * data to userspace while holding locks. Start by trying to allocate
1601 * up to 128k for the buffer, but fall back to a single page if needed.
1602 */
1603 count = min_t(unsigned int, head.fmh_count,
1604 131072 / sizeof(struct fsmap));
1605 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
1606 if (!recs) {
1607 count = min_t(unsigned int, head.fmh_count,
1608 PAGE_SIZE / sizeof(struct fsmap));
1609 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
1610 if (!recs)
1611 return -ENOMEM;
1612 }
1613
1614 xhead.fmh_iflags = head.fmh_iflags;
1615 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1616 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1617
1618 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1619 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1620
1621 head.fmh_entries = 0;
1622 do {
1623 struct fsmap __user *user_recs;
1624 struct fsmap *last_rec;
1625
1626 user_recs = &arg->fmh_recs[head.fmh_entries];
1627 xhead.fmh_entries = 0;
1628 xhead.fmh_count = min_t(unsigned int, count,
1629 head.fmh_count - head.fmh_entries);
1630
1631 /* Run query, record how many entries we got. */
1632 error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1633 switch (error) {
1634 case 0:
1635 /*
1636 * There are no more records in the result set. Copy
1637 * whatever we got to userspace and break out.
1638 */
1639 done = true;
1640 break;
1641 case -ECANCELED:
1642 /*
1643 * The internal memory buffer is full. Copy whatever
1644 * records we got to userspace and go again if we have
1645 * not yet filled the userspace buffer.
1646 */
1647 error = 0;
1648 break;
1649 default:
1650 goto out_free;
1651 }
1652 head.fmh_entries += xhead.fmh_entries;
1653 head.fmh_oflags = xhead.fmh_oflags;
1654
1655 /*
1656 * If the caller wanted a record count or there aren't any
1657 * new records to return, we're done.
1658 */
1659 if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1660 break;
1661
1662 /* Copy all the records we got out to userspace. */
1663 if (copy_to_user(user_recs, recs,
1664 xhead.fmh_entries * sizeof(struct fsmap))) {
1665 error = -EFAULT;
1666 goto out_free;
1667 }
1668
1669 /* Remember the last record flags we copied to userspace. */
1670 last_rec = &recs[xhead.fmh_entries - 1];
1671 last_flags = last_rec->fmr_flags;
1672
1673 /* Set up the low key for the next iteration. */
1674 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1675 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1676 } while (!done && head.fmh_entries < head.fmh_count);
1677
1678 /*
1679 * If there are no more records in the query result set and we're not
1680 * in counting mode, mark the last record returned with the LAST flag.
1681 */
1682 if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1683 struct fsmap __user *user_rec;
1684
1685 last_flags |= FMR_OF_LAST;
1686 user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1687
1688 if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1689 sizeof(last_flags))) {
1690 error = -EFAULT;
1691 goto out_free;
1692 }
1693 }
1694
1695 /* copy back header */
1696 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1697 error = -EFAULT;
1698 goto out_free;
1699 }
1700
1701out_free:
1702 kmem_free(recs);
1703 return error;
1704}
1705
1706STATIC int
1707xfs_ioc_scrub_metadata(
1708 struct file *file,
1709 void __user *arg)
1710{
1711 struct xfs_scrub_metadata scrub;
1712 int error;
1713
1714 if (!capable(CAP_SYS_ADMIN))
1715 return -EPERM;
1716
1717 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1718 return -EFAULT;
1719
1720 error = xfs_scrub_metadata(file, &scrub);
1721 if (error)
1722 return error;
1723
1724 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1725 return -EFAULT;
1726
1727 return 0;
1728}
1729
1730int
1731xfs_ioc_swapext(
1732 xfs_swapext_t *sxp)
1733{
1734 xfs_inode_t *ip, *tip;
1735 struct fd f, tmp;
1736 int error = 0;
1737
1738 /* Pull information for the target fd */
1739 f = fdget((int)sxp->sx_fdtarget);
1740 if (!f.file) {
1741 error = -EINVAL;
1742 goto out;
1743 }
1744
1745 if (!(f.file->f_mode & FMODE_WRITE) ||
1746 !(f.file->f_mode & FMODE_READ) ||
1747 (f.file->f_flags & O_APPEND)) {
1748 error = -EBADF;
1749 goto out_put_file;
1750 }
1751
1752 tmp = fdget((int)sxp->sx_fdtmp);
1753 if (!tmp.file) {
1754 error = -EINVAL;
1755 goto out_put_file;
1756 }
1757
1758 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1759 !(tmp.file->f_mode & FMODE_READ) ||
1760 (tmp.file->f_flags & O_APPEND)) {
1761 error = -EBADF;
1762 goto out_put_tmp_file;
1763 }
1764
1765 if (IS_SWAPFILE(file_inode(f.file)) ||
1766 IS_SWAPFILE(file_inode(tmp.file))) {
1767 error = -EINVAL;
1768 goto out_put_tmp_file;
1769 }
1770
1771 /*
1772 * We need to ensure that the fds passed in point to XFS inodes
1773 * before we cast and access them as XFS structures as we have no
1774 * control over what the user passes us here.
1775 */
1776 if (f.file->f_op != &xfs_file_operations ||
1777 tmp.file->f_op != &xfs_file_operations) {
1778 error = -EINVAL;
1779 goto out_put_tmp_file;
1780 }
1781
1782 ip = XFS_I(file_inode(f.file));
1783 tip = XFS_I(file_inode(tmp.file));
1784
1785 if (ip->i_mount != tip->i_mount) {
1786 error = -EINVAL;
1787 goto out_put_tmp_file;
1788 }
1789
1790 if (ip->i_ino == tip->i_ino) {
1791 error = -EINVAL;
1792 goto out_put_tmp_file;
1793 }
1794
1795 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1796 error = -EIO;
1797 goto out_put_tmp_file;
1798 }
1799
1800 error = xfs_swap_extents(ip, tip, sxp);
1801
1802 out_put_tmp_file:
1803 fdput(tmp);
1804 out_put_file:
1805 fdput(f);
1806 out:
1807 return error;
1808}
1809
1810static int
1811xfs_ioc_getlabel(
1812 struct xfs_mount *mp,
1813 char __user *user_label)
1814{
1815 struct xfs_sb *sbp = &mp->m_sb;
1816 char label[XFSLABEL_MAX + 1];
1817
1818 /* Paranoia */
1819 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1820
1821 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1822 memset(label, 0, sizeof(label));
1823 spin_lock(&mp->m_sb_lock);
1824 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1825 spin_unlock(&mp->m_sb_lock);
1826
1827 if (copy_to_user(user_label, label, sizeof(label)))
1828 return -EFAULT;
1829 return 0;
1830}
1831
1832static int
1833xfs_ioc_setlabel(
1834 struct file *filp,
1835 struct xfs_mount *mp,
1836 char __user *newlabel)
1837{
1838 struct xfs_sb *sbp = &mp->m_sb;
1839 char label[XFSLABEL_MAX + 1];
1840 size_t len;
1841 int error;
1842
1843 if (!capable(CAP_SYS_ADMIN))
1844 return -EPERM;
1845 /*
1846 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1847 * smaller, at 12 bytes. We copy one more to be sure we find the
1848 * (required) NULL character to test the incoming label length.
1849 * NB: The on disk label doesn't need to be null terminated.
1850 */
1851 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1852 return -EFAULT;
1853 len = strnlen(label, XFSLABEL_MAX + 1);
1854 if (len > sizeof(sbp->sb_fname))
1855 return -EINVAL;
1856
1857 error = mnt_want_write_file(filp);
1858 if (error)
1859 return error;
1860
1861 spin_lock(&mp->m_sb_lock);
1862 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1863 memcpy(sbp->sb_fname, label, len);
1864 spin_unlock(&mp->m_sb_lock);
1865
1866 /*
1867 * Now we do several things to satisfy userspace.
1868 * In addition to normal logging of the primary superblock, we also
1869 * immediately write these changes to sector zero for the primary, then
1870 * update all backup supers (as xfs_db does for a label change), then
1871 * invalidate the block device page cache. This is so that any prior
1872 * buffered reads from userspace (i.e. from blkid) are invalidated,
1873 * and userspace will see the newly-written label.
1874 */
1875 error = xfs_sync_sb_buf(mp);
1876 if (error)
1877 goto out;
1878 /*
1879 * growfs also updates backup supers so lock against that.
1880 */
1881 mutex_lock(&mp->m_growlock);
1882 error = xfs_update_secondary_sbs(mp);
1883 mutex_unlock(&mp->m_growlock);
1884
1885 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1886
1887out:
1888 mnt_drop_write_file(filp);
1889 return error;
1890}
1891
1892static inline int
1893xfs_fs_eofblocks_from_user(
1894 struct xfs_fs_eofblocks *src,
1895 struct xfs_icwalk *dst)
1896{
1897 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1898 return -EINVAL;
1899
1900 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1901 return -EINVAL;
1902
1903 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1904 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1905 return -EINVAL;
1906
1907 dst->icw_flags = 0;
1908 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1909 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1910 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1911 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1912 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1913 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1914 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1915 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1916 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1917 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1918
1919 dst->icw_prid = src->eof_prid;
1920 dst->icw_min_file_size = src->eof_min_file_size;
1921
1922 dst->icw_uid = INVALID_UID;
1923 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1924 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1925 if (!uid_valid(dst->icw_uid))
1926 return -EINVAL;
1927 }
1928
1929 dst->icw_gid = INVALID_GID;
1930 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1931 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1932 if (!gid_valid(dst->icw_gid))
1933 return -EINVAL;
1934 }
1935 return 0;
1936}
1937
1938/*
1939 * Note: some of the ioctl's return positive numbers as a
1940 * byte count indicating success, such as readlink_by_handle.
1941 * So we don't "sign flip" like most other routines. This means
1942 * true errors need to be returned as a negative value.
1943 */
1944long
1945xfs_file_ioctl(
1946 struct file *filp,
1947 unsigned int cmd,
1948 unsigned long p)
1949{
1950 struct inode *inode = file_inode(filp);
1951 struct xfs_inode *ip = XFS_I(inode);
1952 struct xfs_mount *mp = ip->i_mount;
1953 void __user *arg = (void __user *)p;
1954 int error;
1955
1956 trace_xfs_file_ioctl(ip);
1957
1958 switch (cmd) {
1959 case FITRIM:
1960 return xfs_ioc_trim(mp, arg);
1961 case FS_IOC_GETFSLABEL:
1962 return xfs_ioc_getlabel(mp, arg);
1963 case FS_IOC_SETFSLABEL:
1964 return xfs_ioc_setlabel(filp, mp, arg);
1965 case XFS_IOC_ALLOCSP:
1966 case XFS_IOC_FREESP:
1967 case XFS_IOC_ALLOCSP64:
1968 case XFS_IOC_FREESP64: {
1969 xfs_flock64_t bf;
1970
1971 if (copy_from_user(&bf, arg, sizeof(bf)))
1972 return -EFAULT;
1973 return xfs_ioc_space(filp, &bf);
1974 }
1975 case XFS_IOC_DIOINFO: {
1976 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1977 struct dioattr da;
1978
1979 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1980 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1981
1982 if (copy_to_user(arg, &da, sizeof(da)))
1983 return -EFAULT;
1984 return 0;
1985 }
1986
1987 case XFS_IOC_FSBULKSTAT_SINGLE:
1988 case XFS_IOC_FSBULKSTAT:
1989 case XFS_IOC_FSINUMBERS:
1990 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1991
1992 case XFS_IOC_BULKSTAT:
1993 return xfs_ioc_bulkstat(filp, cmd, arg);
1994 case XFS_IOC_INUMBERS:
1995 return xfs_ioc_inumbers(mp, cmd, arg);
1996
1997 case XFS_IOC_FSGEOMETRY_V1:
1998 return xfs_ioc_fsgeometry(mp, arg, 3);
1999 case XFS_IOC_FSGEOMETRY_V4:
2000 return xfs_ioc_fsgeometry(mp, arg, 4);
2001 case XFS_IOC_FSGEOMETRY:
2002 return xfs_ioc_fsgeometry(mp, arg, 5);
2003
2004 case XFS_IOC_AG_GEOMETRY:
2005 return xfs_ioc_ag_geometry(mp, arg);
2006
2007 case XFS_IOC_GETVERSION:
2008 return put_user(inode->i_generation, (int __user *)arg);
2009
2010 case XFS_IOC_FSGETXATTRA:
2011 return xfs_ioc_fsgetxattra(ip, arg);
2012
2013 case XFS_IOC_GETBMAP:
2014 case XFS_IOC_GETBMAPA:
2015 case XFS_IOC_GETBMAPX:
2016 return xfs_ioc_getbmap(filp, cmd, arg);
2017
2018 case FS_IOC_GETFSMAP:
2019 return xfs_ioc_getfsmap(ip, arg);
2020
2021 case XFS_IOC_SCRUB_METADATA:
2022 return xfs_ioc_scrub_metadata(filp, arg);
2023
2024 case XFS_IOC_FD_TO_HANDLE:
2025 case XFS_IOC_PATH_TO_HANDLE:
2026 case XFS_IOC_PATH_TO_FSHANDLE: {
2027 xfs_fsop_handlereq_t hreq;
2028
2029 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2030 return -EFAULT;
2031 return xfs_find_handle(cmd, &hreq);
2032 }
2033 case XFS_IOC_OPEN_BY_HANDLE: {
2034 xfs_fsop_handlereq_t hreq;
2035
2036 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2037 return -EFAULT;
2038 return xfs_open_by_handle(filp, &hreq);
2039 }
2040
2041 case XFS_IOC_READLINK_BY_HANDLE: {
2042 xfs_fsop_handlereq_t hreq;
2043
2044 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2045 return -EFAULT;
2046 return xfs_readlink_by_handle(filp, &hreq);
2047 }
2048 case XFS_IOC_ATTRLIST_BY_HANDLE:
2049 return xfs_attrlist_by_handle(filp, arg);
2050
2051 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2052 return xfs_attrmulti_by_handle(filp, arg);
2053
2054 case XFS_IOC_SWAPEXT: {
2055 struct xfs_swapext sxp;
2056
2057 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2058 return -EFAULT;
2059 error = mnt_want_write_file(filp);
2060 if (error)
2061 return error;
2062 error = xfs_ioc_swapext(&sxp);
2063 mnt_drop_write_file(filp);
2064 return error;
2065 }
2066
2067 case XFS_IOC_FSCOUNTS: {
2068 xfs_fsop_counts_t out;
2069
2070 xfs_fs_counts(mp, &out);
2071
2072 if (copy_to_user(arg, &out, sizeof(out)))
2073 return -EFAULT;
2074 return 0;
2075 }
2076
2077 case XFS_IOC_SET_RESBLKS: {
2078 xfs_fsop_resblks_t inout;
2079 uint64_t in;
2080
2081 if (!capable(CAP_SYS_ADMIN))
2082 return -EPERM;
2083
2084 if (mp->m_flags & XFS_MOUNT_RDONLY)
2085 return -EROFS;
2086
2087 if (copy_from_user(&inout, arg, sizeof(inout)))
2088 return -EFAULT;
2089
2090 error = mnt_want_write_file(filp);
2091 if (error)
2092 return error;
2093
2094 /* input parameter is passed in resblks field of structure */
2095 in = inout.resblks;
2096 error = xfs_reserve_blocks(mp, &in, &inout);
2097 mnt_drop_write_file(filp);
2098 if (error)
2099 return error;
2100
2101 if (copy_to_user(arg, &inout, sizeof(inout)))
2102 return -EFAULT;
2103 return 0;
2104 }
2105
2106 case XFS_IOC_GET_RESBLKS: {
2107 xfs_fsop_resblks_t out;
2108
2109 if (!capable(CAP_SYS_ADMIN))
2110 return -EPERM;
2111
2112 error = xfs_reserve_blocks(mp, NULL, &out);
2113 if (error)
2114 return error;
2115
2116 if (copy_to_user(arg, &out, sizeof(out)))
2117 return -EFAULT;
2118
2119 return 0;
2120 }
2121
2122 case XFS_IOC_FSGROWFSDATA: {
2123 struct xfs_growfs_data in;
2124
2125 if (copy_from_user(&in, arg, sizeof(in)))
2126 return -EFAULT;
2127
2128 error = mnt_want_write_file(filp);
2129 if (error)
2130 return error;
2131 error = xfs_growfs_data(mp, &in);
2132 mnt_drop_write_file(filp);
2133 return error;
2134 }
2135
2136 case XFS_IOC_FSGROWFSLOG: {
2137 struct xfs_growfs_log in;
2138
2139 if (copy_from_user(&in, arg, sizeof(in)))
2140 return -EFAULT;
2141
2142 error = mnt_want_write_file(filp);
2143 if (error)
2144 return error;
2145 error = xfs_growfs_log(mp, &in);
2146 mnt_drop_write_file(filp);
2147 return error;
2148 }
2149
2150 case XFS_IOC_FSGROWFSRT: {
2151 xfs_growfs_rt_t in;
2152
2153 if (copy_from_user(&in, arg, sizeof(in)))
2154 return -EFAULT;
2155
2156 error = mnt_want_write_file(filp);
2157 if (error)
2158 return error;
2159 error = xfs_growfs_rt(mp, &in);
2160 mnt_drop_write_file(filp);
2161 return error;
2162 }
2163
2164 case XFS_IOC_GOINGDOWN: {
2165 uint32_t in;
2166
2167 if (!capable(CAP_SYS_ADMIN))
2168 return -EPERM;
2169
2170 if (get_user(in, (uint32_t __user *)arg))
2171 return -EFAULT;
2172
2173 return xfs_fs_goingdown(mp, in);
2174 }
2175
2176 case XFS_IOC_ERROR_INJECTION: {
2177 xfs_error_injection_t in;
2178
2179 if (!capable(CAP_SYS_ADMIN))
2180 return -EPERM;
2181
2182 if (copy_from_user(&in, arg, sizeof(in)))
2183 return -EFAULT;
2184
2185 return xfs_errortag_add(mp, in.errtag);
2186 }
2187
2188 case XFS_IOC_ERROR_CLEARALL:
2189 if (!capable(CAP_SYS_ADMIN))
2190 return -EPERM;
2191
2192 return xfs_errortag_clearall(mp);
2193
2194 case XFS_IOC_FREE_EOFBLOCKS: {
2195 struct xfs_fs_eofblocks eofb;
2196 struct xfs_icwalk icw;
2197
2198 if (!capable(CAP_SYS_ADMIN))
2199 return -EPERM;
2200
2201 if (mp->m_flags & XFS_MOUNT_RDONLY)
2202 return -EROFS;
2203
2204 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2205 return -EFAULT;
2206
2207 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
2208 if (error)
2209 return error;
2210
2211 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
2212
2213 sb_start_write(mp->m_super);
2214 error = xfs_blockgc_free_space(mp, &icw);
2215 sb_end_write(mp->m_super);
2216 return error;
2217 }
2218
2219 default:
2220 return -ENOTTY;
2221 }
2222}
1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_mount.h"
25#include "xfs_inode.h"
26#include "xfs_ioctl.h"
27#include "xfs_alloc.h"
28#include "xfs_rtalloc.h"
29#include "xfs_itable.h"
30#include "xfs_error.h"
31#include "xfs_attr.h"
32#include "xfs_bmap.h"
33#include "xfs_bmap_util.h"
34#include "xfs_fsops.h"
35#include "xfs_discard.h"
36#include "xfs_quota.h"
37#include "xfs_export.h"
38#include "xfs_trace.h"
39#include "xfs_icache.h"
40#include "xfs_symlink.h"
41#include "xfs_trans.h"
42#include "xfs_pnfs.h"
43#include "xfs_acl.h"
44#include "xfs_btree.h"
45#include <linux/fsmap.h>
46#include "xfs_fsmap.h"
47#include "scrub/xfs_scrub.h"
48#include "xfs_sb.h"
49
50#include <linux/capability.h>
51#include <linux/cred.h>
52#include <linux/dcache.h>
53#include <linux/mount.h>
54#include <linux/namei.h>
55#include <linux/pagemap.h>
56#include <linux/slab.h>
57#include <linux/exportfs.h>
58
59/*
60 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
61 * a file or fs handle.
62 *
63 * XFS_IOC_PATH_TO_FSHANDLE
64 * returns fs handle for a mount point or path within that mount point
65 * XFS_IOC_FD_TO_HANDLE
66 * returns full handle for a FD opened in user space
67 * XFS_IOC_PATH_TO_HANDLE
68 * returns full handle for a path
69 */
70int
71xfs_find_handle(
72 unsigned int cmd,
73 xfs_fsop_handlereq_t *hreq)
74{
75 int hsize;
76 xfs_handle_t handle;
77 struct inode *inode;
78 struct fd f = {NULL};
79 struct path path;
80 int error;
81 struct xfs_inode *ip;
82
83 if (cmd == XFS_IOC_FD_TO_HANDLE) {
84 f = fdget(hreq->fd);
85 if (!f.file)
86 return -EBADF;
87 inode = file_inode(f.file);
88 } else {
89 error = user_lpath((const char __user *)hreq->path, &path);
90 if (error)
91 return error;
92 inode = d_inode(path.dentry);
93 }
94 ip = XFS_I(inode);
95
96 /*
97 * We can only generate handles for inodes residing on a XFS filesystem,
98 * and only for regular files, directories or symbolic links.
99 */
100 error = -EINVAL;
101 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
102 goto out_put;
103
104 error = -EBADF;
105 if (!S_ISREG(inode->i_mode) &&
106 !S_ISDIR(inode->i_mode) &&
107 !S_ISLNK(inode->i_mode))
108 goto out_put;
109
110
111 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
112
113 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
114 /*
115 * This handle only contains an fsid, zero the rest.
116 */
117 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
118 hsize = sizeof(xfs_fsid_t);
119 } else {
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = inode->i_generation;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 hsize = sizeof(xfs_handle_t);
126 }
127
128 error = -EFAULT;
129 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
130 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
131 goto out_put;
132
133 error = 0;
134
135 out_put:
136 if (cmd == XFS_IOC_FD_TO_HANDLE)
137 fdput(f);
138 else
139 path_put(&path);
140 return error;
141}
142
143/*
144 * No need to do permission checks on the various pathname components
145 * as the handle operations are privileged.
146 */
147STATIC int
148xfs_handle_acceptable(
149 void *context,
150 struct dentry *dentry)
151{
152 return 1;
153}
154
155/*
156 * Convert userspace handle data into a dentry.
157 */
158struct dentry *
159xfs_handle_to_dentry(
160 struct file *parfilp,
161 void __user *uhandle,
162 u32 hlen)
163{
164 xfs_handle_t handle;
165 struct xfs_fid64 fid;
166
167 /*
168 * Only allow handle opens under a directory.
169 */
170 if (!S_ISDIR(file_inode(parfilp)->i_mode))
171 return ERR_PTR(-ENOTDIR);
172
173 if (hlen != sizeof(xfs_handle_t))
174 return ERR_PTR(-EINVAL);
175 if (copy_from_user(&handle, uhandle, hlen))
176 return ERR_PTR(-EFAULT);
177 if (handle.ha_fid.fid_len !=
178 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
179 return ERR_PTR(-EINVAL);
180
181 memset(&fid, 0, sizeof(struct fid));
182 fid.ino = handle.ha_fid.fid_ino;
183 fid.gen = handle.ha_fid.fid_gen;
184
185 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
186 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
187 xfs_handle_acceptable, NULL);
188}
189
190STATIC struct dentry *
191xfs_handlereq_to_dentry(
192 struct file *parfilp,
193 xfs_fsop_handlereq_t *hreq)
194{
195 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
196}
197
198int
199xfs_open_by_handle(
200 struct file *parfilp,
201 xfs_fsop_handlereq_t *hreq)
202{
203 const struct cred *cred = current_cred();
204 int error;
205 int fd;
206 int permflag;
207 struct file *filp;
208 struct inode *inode;
209 struct dentry *dentry;
210 fmode_t fmode;
211 struct path path;
212
213 if (!capable(CAP_SYS_ADMIN))
214 return -EPERM;
215
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 if (IS_ERR(dentry))
218 return PTR_ERR(dentry);
219 inode = d_inode(dentry);
220
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
223 error = -EPERM;
224 goto out_dput;
225 }
226
227#if BITS_PER_LONG != 32
228 hreq->oflags |= O_LARGEFILE;
229#endif
230
231 permflag = hreq->oflags;
232 fmode = OPEN_FMODE(permflag);
233 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
234 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
235 error = -EPERM;
236 goto out_dput;
237 }
238
239 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
240 error = -EPERM;
241 goto out_dput;
242 }
243
244 /* Can't write directories. */
245 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
246 error = -EISDIR;
247 goto out_dput;
248 }
249
250 fd = get_unused_fd_flags(0);
251 if (fd < 0) {
252 error = fd;
253 goto out_dput;
254 }
255
256 path.mnt = parfilp->f_path.mnt;
257 path.dentry = dentry;
258 filp = dentry_open(&path, hreq->oflags, cred);
259 dput(dentry);
260 if (IS_ERR(filp)) {
261 put_unused_fd(fd);
262 return PTR_ERR(filp);
263 }
264
265 if (S_ISREG(inode->i_mode)) {
266 filp->f_flags |= O_NOATIME;
267 filp->f_mode |= FMODE_NOCMTIME;
268 }
269
270 fd_install(fd, filp);
271 return fd;
272
273 out_dput:
274 dput(dentry);
275 return error;
276}
277
278int
279xfs_readlink_by_handle(
280 struct file *parfilp,
281 xfs_fsop_handlereq_t *hreq)
282{
283 struct dentry *dentry;
284 __u32 olen;
285 int error;
286
287 if (!capable(CAP_SYS_ADMIN))
288 return -EPERM;
289
290 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
291 if (IS_ERR(dentry))
292 return PTR_ERR(dentry);
293
294 /* Restrict this handle operation to symlinks only. */
295 if (!d_is_symlink(dentry)) {
296 error = -EINVAL;
297 goto out_dput;
298 }
299
300 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
301 error = -EFAULT;
302 goto out_dput;
303 }
304
305 error = vfs_readlink(dentry, hreq->ohandle, olen);
306
307 out_dput:
308 dput(dentry);
309 return error;
310}
311
312int
313xfs_set_dmattrs(
314 xfs_inode_t *ip,
315 uint evmask,
316 uint16_t state)
317{
318 xfs_mount_t *mp = ip->i_mount;
319 xfs_trans_t *tp;
320 int error;
321
322 if (!capable(CAP_SYS_ADMIN))
323 return -EPERM;
324
325 if (XFS_FORCED_SHUTDOWN(mp))
326 return -EIO;
327
328 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
329 if (error)
330 return error;
331
332 xfs_ilock(ip, XFS_ILOCK_EXCL);
333 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
334
335 ip->i_d.di_dmevmask = evmask;
336 ip->i_d.di_dmstate = state;
337
338 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
339 error = xfs_trans_commit(tp);
340
341 return error;
342}
343
344STATIC int
345xfs_fssetdm_by_handle(
346 struct file *parfilp,
347 void __user *arg)
348{
349 int error;
350 struct fsdmidata fsd;
351 xfs_fsop_setdm_handlereq_t dmhreq;
352 struct dentry *dentry;
353
354 if (!capable(CAP_MKNOD))
355 return -EPERM;
356 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
357 return -EFAULT;
358
359 error = mnt_want_write_file(parfilp);
360 if (error)
361 return error;
362
363 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
364 if (IS_ERR(dentry)) {
365 mnt_drop_write_file(parfilp);
366 return PTR_ERR(dentry);
367 }
368
369 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
370 error = -EPERM;
371 goto out;
372 }
373
374 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
375 error = -EFAULT;
376 goto out;
377 }
378
379 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
380 fsd.fsd_dmstate);
381
382 out:
383 mnt_drop_write_file(parfilp);
384 dput(dentry);
385 return error;
386}
387
388STATIC int
389xfs_attrlist_by_handle(
390 struct file *parfilp,
391 void __user *arg)
392{
393 int error = -ENOMEM;
394 attrlist_cursor_kern_t *cursor;
395 struct xfs_fsop_attrlist_handlereq __user *p = arg;
396 xfs_fsop_attrlist_handlereq_t al_hreq;
397 struct dentry *dentry;
398 char *kbuf;
399
400 if (!capable(CAP_SYS_ADMIN))
401 return -EPERM;
402 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
403 return -EFAULT;
404 if (al_hreq.buflen < sizeof(struct attrlist) ||
405 al_hreq.buflen > XFS_XATTR_LIST_MAX)
406 return -EINVAL;
407
408 /*
409 * Reject flags, only allow namespaces.
410 */
411 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
412 return -EINVAL;
413
414 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
415 if (IS_ERR(dentry))
416 return PTR_ERR(dentry);
417
418 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
419 if (!kbuf)
420 goto out_dput;
421
422 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
423 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
424 al_hreq.flags, cursor);
425 if (error)
426 goto out_kfree;
427
428 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
429 error = -EFAULT;
430 goto out_kfree;
431 }
432
433 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
434 error = -EFAULT;
435
436out_kfree:
437 kmem_free(kbuf);
438out_dput:
439 dput(dentry);
440 return error;
441}
442
443int
444xfs_attrmulti_attr_get(
445 struct inode *inode,
446 unsigned char *name,
447 unsigned char __user *ubuf,
448 uint32_t *len,
449 uint32_t flags)
450{
451 unsigned char *kbuf;
452 int error = -EFAULT;
453
454 if (*len > XFS_XATTR_SIZE_MAX)
455 return -EINVAL;
456 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
457 if (!kbuf)
458 return -ENOMEM;
459
460 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
461 if (error)
462 goto out_kfree;
463
464 if (copy_to_user(ubuf, kbuf, *len))
465 error = -EFAULT;
466
467out_kfree:
468 kmem_free(kbuf);
469 return error;
470}
471
472int
473xfs_attrmulti_attr_set(
474 struct inode *inode,
475 unsigned char *name,
476 const unsigned char __user *ubuf,
477 uint32_t len,
478 uint32_t flags)
479{
480 unsigned char *kbuf;
481 int error;
482
483 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
484 return -EPERM;
485 if (len > XFS_XATTR_SIZE_MAX)
486 return -EINVAL;
487
488 kbuf = memdup_user(ubuf, len);
489 if (IS_ERR(kbuf))
490 return PTR_ERR(kbuf);
491
492 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
493 if (!error)
494 xfs_forget_acl(inode, name, flags);
495 kfree(kbuf);
496 return error;
497}
498
499int
500xfs_attrmulti_attr_remove(
501 struct inode *inode,
502 unsigned char *name,
503 uint32_t flags)
504{
505 int error;
506
507 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
508 return -EPERM;
509 error = xfs_attr_remove(XFS_I(inode), name, flags);
510 if (!error)
511 xfs_forget_acl(inode, name, flags);
512 return error;
513}
514
515STATIC int
516xfs_attrmulti_by_handle(
517 struct file *parfilp,
518 void __user *arg)
519{
520 int error;
521 xfs_attr_multiop_t *ops;
522 xfs_fsop_attrmulti_handlereq_t am_hreq;
523 struct dentry *dentry;
524 unsigned int i, size;
525 unsigned char *attr_name;
526
527 if (!capable(CAP_SYS_ADMIN))
528 return -EPERM;
529 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
530 return -EFAULT;
531
532 /* overflow check */
533 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
534 return -E2BIG;
535
536 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
537 if (IS_ERR(dentry))
538 return PTR_ERR(dentry);
539
540 error = -E2BIG;
541 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
542 if (!size || size > 16 * PAGE_SIZE)
543 goto out_dput;
544
545 ops = memdup_user(am_hreq.ops, size);
546 if (IS_ERR(ops)) {
547 error = PTR_ERR(ops);
548 goto out_dput;
549 }
550
551 error = -ENOMEM;
552 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
553 if (!attr_name)
554 goto out_kfree_ops;
555
556 error = 0;
557 for (i = 0; i < am_hreq.opcount; i++) {
558 ops[i].am_error = strncpy_from_user((char *)attr_name,
559 ops[i].am_attrname, MAXNAMELEN);
560 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
561 error = -ERANGE;
562 if (ops[i].am_error < 0)
563 break;
564
565 switch (ops[i].am_opcode) {
566 case ATTR_OP_GET:
567 ops[i].am_error = xfs_attrmulti_attr_get(
568 d_inode(dentry), attr_name,
569 ops[i].am_attrvalue, &ops[i].am_length,
570 ops[i].am_flags);
571 break;
572 case ATTR_OP_SET:
573 ops[i].am_error = mnt_want_write_file(parfilp);
574 if (ops[i].am_error)
575 break;
576 ops[i].am_error = xfs_attrmulti_attr_set(
577 d_inode(dentry), attr_name,
578 ops[i].am_attrvalue, ops[i].am_length,
579 ops[i].am_flags);
580 mnt_drop_write_file(parfilp);
581 break;
582 case ATTR_OP_REMOVE:
583 ops[i].am_error = mnt_want_write_file(parfilp);
584 if (ops[i].am_error)
585 break;
586 ops[i].am_error = xfs_attrmulti_attr_remove(
587 d_inode(dentry), attr_name,
588 ops[i].am_flags);
589 mnt_drop_write_file(parfilp);
590 break;
591 default:
592 ops[i].am_error = -EINVAL;
593 }
594 }
595
596 if (copy_to_user(am_hreq.ops, ops, size))
597 error = -EFAULT;
598
599 kfree(attr_name);
600 out_kfree_ops:
601 kfree(ops);
602 out_dput:
603 dput(dentry);
604 return error;
605}
606
607int
608xfs_ioc_space(
609 struct file *filp,
610 unsigned int cmd,
611 xfs_flock64_t *bf)
612{
613 struct inode *inode = file_inode(filp);
614 struct xfs_inode *ip = XFS_I(inode);
615 struct iattr iattr;
616 enum xfs_prealloc_flags flags = 0;
617 uint iolock = XFS_IOLOCK_EXCL;
618 int error;
619
620 /*
621 * Only allow the sys admin to reserve space unless
622 * unwritten extents are enabled.
623 */
624 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
625 !capable(CAP_SYS_ADMIN))
626 return -EPERM;
627
628 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
629 return -EPERM;
630
631 if (!(filp->f_mode & FMODE_WRITE))
632 return -EBADF;
633
634 if (!S_ISREG(inode->i_mode))
635 return -EINVAL;
636
637 if (filp->f_flags & O_DSYNC)
638 flags |= XFS_PREALLOC_SYNC;
639 if (filp->f_mode & FMODE_NOCMTIME)
640 flags |= XFS_PREALLOC_INVISIBLE;
641
642 error = mnt_want_write_file(filp);
643 if (error)
644 return error;
645
646 xfs_ilock(ip, iolock);
647 error = xfs_break_layouts(inode, &iolock);
648 if (error)
649 goto out_unlock;
650
651 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
652 iolock |= XFS_MMAPLOCK_EXCL;
653
654 switch (bf->l_whence) {
655 case 0: /*SEEK_SET*/
656 break;
657 case 1: /*SEEK_CUR*/
658 bf->l_start += filp->f_pos;
659 break;
660 case 2: /*SEEK_END*/
661 bf->l_start += XFS_ISIZE(ip);
662 break;
663 default:
664 error = -EINVAL;
665 goto out_unlock;
666 }
667
668 /*
669 * length of <= 0 for resv/unresv/zero is invalid. length for
670 * alloc/free is ignored completely and we have no idea what userspace
671 * might have set it to, so set it to zero to allow range
672 * checks to pass.
673 */
674 switch (cmd) {
675 case XFS_IOC_ZERO_RANGE:
676 case XFS_IOC_RESVSP:
677 case XFS_IOC_RESVSP64:
678 case XFS_IOC_UNRESVSP:
679 case XFS_IOC_UNRESVSP64:
680 if (bf->l_len <= 0) {
681 error = -EINVAL;
682 goto out_unlock;
683 }
684 break;
685 default:
686 bf->l_len = 0;
687 break;
688 }
689
690 if (bf->l_start < 0 ||
691 bf->l_start > inode->i_sb->s_maxbytes ||
692 bf->l_start + bf->l_len < 0 ||
693 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
694 error = -EINVAL;
695 goto out_unlock;
696 }
697
698 switch (cmd) {
699 case XFS_IOC_ZERO_RANGE:
700 flags |= XFS_PREALLOC_SET;
701 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
702 break;
703 case XFS_IOC_RESVSP:
704 case XFS_IOC_RESVSP64:
705 flags |= XFS_PREALLOC_SET;
706 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
707 XFS_BMAPI_PREALLOC);
708 break;
709 case XFS_IOC_UNRESVSP:
710 case XFS_IOC_UNRESVSP64:
711 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
712 break;
713 case XFS_IOC_ALLOCSP:
714 case XFS_IOC_ALLOCSP64:
715 case XFS_IOC_FREESP:
716 case XFS_IOC_FREESP64:
717 flags |= XFS_PREALLOC_CLEAR;
718 if (bf->l_start > XFS_ISIZE(ip)) {
719 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
720 bf->l_start - XFS_ISIZE(ip), 0);
721 if (error)
722 goto out_unlock;
723 }
724
725 iattr.ia_valid = ATTR_SIZE;
726 iattr.ia_size = bf->l_start;
727
728 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
729 break;
730 default:
731 ASSERT(0);
732 error = -EINVAL;
733 }
734
735 if (error)
736 goto out_unlock;
737
738 error = xfs_update_prealloc_flags(ip, flags);
739
740out_unlock:
741 xfs_iunlock(ip, iolock);
742 mnt_drop_write_file(filp);
743 return error;
744}
745
746STATIC int
747xfs_ioc_bulkstat(
748 xfs_mount_t *mp,
749 unsigned int cmd,
750 void __user *arg)
751{
752 xfs_fsop_bulkreq_t bulkreq;
753 int count; /* # of records returned */
754 xfs_ino_t inlast; /* last inode number */
755 int done;
756 int error;
757
758 /* done = 1 if there are more stats to get and if bulkstat */
759 /* should be called again (unused here, but used in dmapi) */
760
761 if (!capable(CAP_SYS_ADMIN))
762 return -EPERM;
763
764 if (XFS_FORCED_SHUTDOWN(mp))
765 return -EIO;
766
767 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
768 return -EFAULT;
769
770 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
771 return -EFAULT;
772
773 if ((count = bulkreq.icount) <= 0)
774 return -EINVAL;
775
776 if (bulkreq.ubuffer == NULL)
777 return -EINVAL;
778
779 if (cmd == XFS_IOC_FSINUMBERS)
780 error = xfs_inumbers(mp, &inlast, &count,
781 bulkreq.ubuffer, xfs_inumbers_fmt);
782 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
783 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
784 sizeof(xfs_bstat_t), NULL, &done);
785 else /* XFS_IOC_FSBULKSTAT */
786 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
787 sizeof(xfs_bstat_t), bulkreq.ubuffer,
788 &done);
789
790 if (error)
791 return error;
792
793 if (bulkreq.ocount != NULL) {
794 if (copy_to_user(bulkreq.lastip, &inlast,
795 sizeof(xfs_ino_t)))
796 return -EFAULT;
797
798 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
799 return -EFAULT;
800 }
801
802 return 0;
803}
804
805STATIC int
806xfs_ioc_fsgeometry_v1(
807 xfs_mount_t *mp,
808 void __user *arg)
809{
810 xfs_fsop_geom_t fsgeo;
811 int error;
812
813 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
814 if (error)
815 return error;
816
817 /*
818 * Caller should have passed an argument of type
819 * xfs_fsop_geom_v1_t. This is a proper subset of the
820 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
821 */
822 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
823 return -EFAULT;
824 return 0;
825}
826
827STATIC int
828xfs_ioc_fsgeometry(
829 xfs_mount_t *mp,
830 void __user *arg)
831{
832 xfs_fsop_geom_t fsgeo;
833 int error;
834
835 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 4);
836 if (error)
837 return error;
838
839 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
840 return -EFAULT;
841 return 0;
842}
843
844/*
845 * Linux extended inode flags interface.
846 */
847
848STATIC unsigned int
849xfs_merge_ioc_xflags(
850 unsigned int flags,
851 unsigned int start)
852{
853 unsigned int xflags = start;
854
855 if (flags & FS_IMMUTABLE_FL)
856 xflags |= FS_XFLAG_IMMUTABLE;
857 else
858 xflags &= ~FS_XFLAG_IMMUTABLE;
859 if (flags & FS_APPEND_FL)
860 xflags |= FS_XFLAG_APPEND;
861 else
862 xflags &= ~FS_XFLAG_APPEND;
863 if (flags & FS_SYNC_FL)
864 xflags |= FS_XFLAG_SYNC;
865 else
866 xflags &= ~FS_XFLAG_SYNC;
867 if (flags & FS_NOATIME_FL)
868 xflags |= FS_XFLAG_NOATIME;
869 else
870 xflags &= ~FS_XFLAG_NOATIME;
871 if (flags & FS_NODUMP_FL)
872 xflags |= FS_XFLAG_NODUMP;
873 else
874 xflags &= ~FS_XFLAG_NODUMP;
875
876 return xflags;
877}
878
879STATIC unsigned int
880xfs_di2lxflags(
881 uint16_t di_flags)
882{
883 unsigned int flags = 0;
884
885 if (di_flags & XFS_DIFLAG_IMMUTABLE)
886 flags |= FS_IMMUTABLE_FL;
887 if (di_flags & XFS_DIFLAG_APPEND)
888 flags |= FS_APPEND_FL;
889 if (di_flags & XFS_DIFLAG_SYNC)
890 flags |= FS_SYNC_FL;
891 if (di_flags & XFS_DIFLAG_NOATIME)
892 flags |= FS_NOATIME_FL;
893 if (di_flags & XFS_DIFLAG_NODUMP)
894 flags |= FS_NODUMP_FL;
895 return flags;
896}
897
898STATIC int
899xfs_ioc_fsgetxattr(
900 xfs_inode_t *ip,
901 int attr,
902 void __user *arg)
903{
904 struct fsxattr fa;
905
906 memset(&fa, 0, sizeof(struct fsxattr));
907
908 xfs_ilock(ip, XFS_ILOCK_SHARED);
909 fa.fsx_xflags = xfs_ip2xflags(ip);
910 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
911 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
912 ip->i_mount->m_sb.sb_blocklog;
913 fa.fsx_projid = xfs_get_projid(ip);
914
915 if (attr) {
916 if (ip->i_afp) {
917 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
918 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
919 else
920 fa.fsx_nextents = ip->i_d.di_anextents;
921 } else
922 fa.fsx_nextents = 0;
923 } else {
924 if (ip->i_df.if_flags & XFS_IFEXTENTS)
925 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
926 else
927 fa.fsx_nextents = ip->i_d.di_nextents;
928 }
929 xfs_iunlock(ip, XFS_ILOCK_SHARED);
930
931 if (copy_to_user(arg, &fa, sizeof(fa)))
932 return -EFAULT;
933 return 0;
934}
935
936STATIC uint16_t
937xfs_flags2diflags(
938 struct xfs_inode *ip,
939 unsigned int xflags)
940{
941 /* can't set PREALLOC this way, just preserve it */
942 uint16_t di_flags =
943 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
944
945 if (xflags & FS_XFLAG_IMMUTABLE)
946 di_flags |= XFS_DIFLAG_IMMUTABLE;
947 if (xflags & FS_XFLAG_APPEND)
948 di_flags |= XFS_DIFLAG_APPEND;
949 if (xflags & FS_XFLAG_SYNC)
950 di_flags |= XFS_DIFLAG_SYNC;
951 if (xflags & FS_XFLAG_NOATIME)
952 di_flags |= XFS_DIFLAG_NOATIME;
953 if (xflags & FS_XFLAG_NODUMP)
954 di_flags |= XFS_DIFLAG_NODUMP;
955 if (xflags & FS_XFLAG_NODEFRAG)
956 di_flags |= XFS_DIFLAG_NODEFRAG;
957 if (xflags & FS_XFLAG_FILESTREAM)
958 di_flags |= XFS_DIFLAG_FILESTREAM;
959 if (S_ISDIR(VFS_I(ip)->i_mode)) {
960 if (xflags & FS_XFLAG_RTINHERIT)
961 di_flags |= XFS_DIFLAG_RTINHERIT;
962 if (xflags & FS_XFLAG_NOSYMLINKS)
963 di_flags |= XFS_DIFLAG_NOSYMLINKS;
964 if (xflags & FS_XFLAG_EXTSZINHERIT)
965 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
966 if (xflags & FS_XFLAG_PROJINHERIT)
967 di_flags |= XFS_DIFLAG_PROJINHERIT;
968 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
969 if (xflags & FS_XFLAG_REALTIME)
970 di_flags |= XFS_DIFLAG_REALTIME;
971 if (xflags & FS_XFLAG_EXTSIZE)
972 di_flags |= XFS_DIFLAG_EXTSIZE;
973 }
974
975 return di_flags;
976}
977
978STATIC uint64_t
979xfs_flags2diflags2(
980 struct xfs_inode *ip,
981 unsigned int xflags)
982{
983 uint64_t di_flags2 =
984 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
985
986 if (xflags & FS_XFLAG_DAX)
987 di_flags2 |= XFS_DIFLAG2_DAX;
988 if (xflags & FS_XFLAG_COWEXTSIZE)
989 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
990
991 return di_flags2;
992}
993
994STATIC void
995xfs_diflags_to_linux(
996 struct xfs_inode *ip)
997{
998 struct inode *inode = VFS_I(ip);
999 unsigned int xflags = xfs_ip2xflags(ip);
1000
1001 if (xflags & FS_XFLAG_IMMUTABLE)
1002 inode->i_flags |= S_IMMUTABLE;
1003 else
1004 inode->i_flags &= ~S_IMMUTABLE;
1005 if (xflags & FS_XFLAG_APPEND)
1006 inode->i_flags |= S_APPEND;
1007 else
1008 inode->i_flags &= ~S_APPEND;
1009 if (xflags & FS_XFLAG_SYNC)
1010 inode->i_flags |= S_SYNC;
1011 else
1012 inode->i_flags &= ~S_SYNC;
1013 if (xflags & FS_XFLAG_NOATIME)
1014 inode->i_flags |= S_NOATIME;
1015 else
1016 inode->i_flags &= ~S_NOATIME;
1017#if 0 /* disabled until the flag switching races are sorted out */
1018 if (xflags & FS_XFLAG_DAX)
1019 inode->i_flags |= S_DAX;
1020 else
1021 inode->i_flags &= ~S_DAX;
1022#endif
1023}
1024
1025static int
1026xfs_ioctl_setattr_xflags(
1027 struct xfs_trans *tp,
1028 struct xfs_inode *ip,
1029 struct fsxattr *fa)
1030{
1031 struct xfs_mount *mp = ip->i_mount;
1032 uint64_t di_flags2;
1033
1034 /* Can't change realtime flag if any extents are allocated. */
1035 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1036 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1037 return -EINVAL;
1038
1039 /* If realtime flag is set then must have realtime device */
1040 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1041 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1042 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1043 return -EINVAL;
1044 }
1045
1046 /* Clear reflink if we are actually able to set the rt flag. */
1047 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1048 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1049
1050 /* Don't allow us to set DAX mode for a reflinked file for now. */
1051 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1052 return -EINVAL;
1053
1054 /*
1055 * Can't modify an immutable/append-only file unless
1056 * we have appropriate permission.
1057 */
1058 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1059 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1060 !capable(CAP_LINUX_IMMUTABLE))
1061 return -EPERM;
1062
1063 /* diflags2 only valid for v3 inodes. */
1064 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1065 if (di_flags2 && ip->i_d.di_version < 3)
1066 return -EINVAL;
1067
1068 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1069 ip->i_d.di_flags2 = di_flags2;
1070
1071 xfs_diflags_to_linux(ip);
1072 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1073 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1074 XFS_STATS_INC(mp, xs_ig_attrchg);
1075 return 0;
1076}
1077
1078/*
1079 * If we are changing DAX flags, we have to ensure the file is clean and any
1080 * cached objects in the address space are invalidated and removed. This
1081 * requires us to lock out other IO and page faults similar to a truncate
1082 * operation. The locks need to be held until the transaction has been committed
1083 * so that the cache invalidation is atomic with respect to the DAX flag
1084 * manipulation.
1085 */
1086static int
1087xfs_ioctl_setattr_dax_invalidate(
1088 struct xfs_inode *ip,
1089 struct fsxattr *fa,
1090 int *join_flags)
1091{
1092 struct inode *inode = VFS_I(ip);
1093 struct super_block *sb = inode->i_sb;
1094 int error;
1095
1096 *join_flags = 0;
1097
1098 /*
1099 * It is only valid to set the DAX flag on regular files and
1100 * directories on filesystems where the block size is equal to the page
1101 * size. On directories it serves as an inherit hint.
1102 */
1103 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1104 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1105 return -EINVAL;
1106 if (bdev_dax_supported(sb, sb->s_blocksize) < 0)
1107 return -EINVAL;
1108 }
1109
1110 /* If the DAX state is not changing, we have nothing to do here. */
1111 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1112 return 0;
1113 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1114 return 0;
1115
1116 /* lock, flush and invalidate mapping in preparation for flag change */
1117 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1118 error = filemap_write_and_wait(inode->i_mapping);
1119 if (error)
1120 goto out_unlock;
1121 error = invalidate_inode_pages2(inode->i_mapping);
1122 if (error)
1123 goto out_unlock;
1124
1125 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1126 return 0;
1127
1128out_unlock:
1129 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1130 return error;
1131
1132}
1133
1134/*
1135 * Set up the transaction structure for the setattr operation, checking that we
1136 * have permission to do so. On success, return a clean transaction and the
1137 * inode locked exclusively ready for further operation specific checks. On
1138 * failure, return an error without modifying or locking the inode.
1139 *
1140 * The inode might already be IO locked on call. If this is the case, it is
1141 * indicated in @join_flags and we take full responsibility for ensuring they
1142 * are unlocked from now on. Hence if we have an error here, we still have to
1143 * unlock them. Otherwise, once they are joined to the transaction, they will
1144 * be unlocked on commit/cancel.
1145 */
1146static struct xfs_trans *
1147xfs_ioctl_setattr_get_trans(
1148 struct xfs_inode *ip,
1149 int join_flags)
1150{
1151 struct xfs_mount *mp = ip->i_mount;
1152 struct xfs_trans *tp;
1153 int error = -EROFS;
1154
1155 if (mp->m_flags & XFS_MOUNT_RDONLY)
1156 goto out_unlock;
1157 error = -EIO;
1158 if (XFS_FORCED_SHUTDOWN(mp))
1159 goto out_unlock;
1160
1161 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1162 if (error)
1163 return ERR_PTR(error);
1164
1165 xfs_ilock(ip, XFS_ILOCK_EXCL);
1166 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1167 join_flags = 0;
1168
1169 /*
1170 * CAP_FOWNER overrides the following restrictions:
1171 *
1172 * The user ID of the calling process must be equal to the file owner
1173 * ID, except in cases where the CAP_FSETID capability is applicable.
1174 */
1175 if (!inode_owner_or_capable(VFS_I(ip))) {
1176 error = -EPERM;
1177 goto out_cancel;
1178 }
1179
1180 if (mp->m_flags & XFS_MOUNT_WSYNC)
1181 xfs_trans_set_sync(tp);
1182
1183 return tp;
1184
1185out_cancel:
1186 xfs_trans_cancel(tp);
1187out_unlock:
1188 if (join_flags)
1189 xfs_iunlock(ip, join_flags);
1190 return ERR_PTR(error);
1191}
1192
1193/*
1194 * extent size hint validation is somewhat cumbersome. Rules are:
1195 *
1196 * 1. extent size hint is only valid for directories and regular files
1197 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1198 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1199 * 4. can only be changed on regular files if no extents are allocated
1200 * 5. can be changed on directories at any time
1201 * 6. extsize hint of 0 turns off hints, clears inode flags.
1202 * 7. Extent size must be a multiple of the appropriate block size.
1203 * 8. for non-realtime files, the extent size hint must be limited
1204 * to half the AG size to avoid alignment extending the extent beyond the
1205 * limits of the AG.
1206 *
1207 * Please keep this function in sync with xfs_scrub_inode_extsize.
1208 */
1209static int
1210xfs_ioctl_setattr_check_extsize(
1211 struct xfs_inode *ip,
1212 struct fsxattr *fa)
1213{
1214 struct xfs_mount *mp = ip->i_mount;
1215
1216 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1217 return -EINVAL;
1218
1219 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1220 !S_ISDIR(VFS_I(ip)->i_mode))
1221 return -EINVAL;
1222
1223 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1224 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1225 return -EINVAL;
1226
1227 if (fa->fsx_extsize != 0) {
1228 xfs_extlen_t size;
1229 xfs_fsblock_t extsize_fsb;
1230
1231 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1232 if (extsize_fsb > MAXEXTLEN)
1233 return -EINVAL;
1234
1235 if (XFS_IS_REALTIME_INODE(ip) ||
1236 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1237 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1238 } else {
1239 size = mp->m_sb.sb_blocksize;
1240 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1241 return -EINVAL;
1242 }
1243
1244 if (fa->fsx_extsize % size)
1245 return -EINVAL;
1246 } else
1247 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1248
1249 return 0;
1250}
1251
1252/*
1253 * CoW extent size hint validation rules are:
1254 *
1255 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1256 * The inode does not have to have any shared blocks, but it must be a v3.
1257 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1258 * for a directory, the hint is propagated to new files.
1259 * 3. Can be changed on files & directories at any time.
1260 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1261 * 5. Extent size must be a multiple of the appropriate block size.
1262 * 6. The extent size hint must be limited to half the AG size to avoid
1263 * alignment extending the extent beyond the limits of the AG.
1264 *
1265 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1266 */
1267static int
1268xfs_ioctl_setattr_check_cowextsize(
1269 struct xfs_inode *ip,
1270 struct fsxattr *fa)
1271{
1272 struct xfs_mount *mp = ip->i_mount;
1273
1274 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1275 return 0;
1276
1277 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1278 ip->i_d.di_version != 3)
1279 return -EINVAL;
1280
1281 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1282 return -EINVAL;
1283
1284 if (fa->fsx_cowextsize != 0) {
1285 xfs_extlen_t size;
1286 xfs_fsblock_t cowextsize_fsb;
1287
1288 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1289 if (cowextsize_fsb > MAXEXTLEN)
1290 return -EINVAL;
1291
1292 size = mp->m_sb.sb_blocksize;
1293 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1294 return -EINVAL;
1295
1296 if (fa->fsx_cowextsize % size)
1297 return -EINVAL;
1298 } else
1299 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1300
1301 return 0;
1302}
1303
1304static int
1305xfs_ioctl_setattr_check_projid(
1306 struct xfs_inode *ip,
1307 struct fsxattr *fa)
1308{
1309 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1310 if (fa->fsx_projid > (uint16_t)-1 &&
1311 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1312 return -EINVAL;
1313
1314 /*
1315 * Project Quota ID state is only allowed to change from within the init
1316 * namespace. Enforce that restriction only if we are trying to change
1317 * the quota ID state. Everything else is allowed in user namespaces.
1318 */
1319 if (current_user_ns() == &init_user_ns)
1320 return 0;
1321
1322 if (xfs_get_projid(ip) != fa->fsx_projid)
1323 return -EINVAL;
1324 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1325 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1326 return -EINVAL;
1327
1328 return 0;
1329}
1330
1331STATIC int
1332xfs_ioctl_setattr(
1333 xfs_inode_t *ip,
1334 struct fsxattr *fa)
1335{
1336 struct xfs_mount *mp = ip->i_mount;
1337 struct xfs_trans *tp;
1338 struct xfs_dquot *udqp = NULL;
1339 struct xfs_dquot *pdqp = NULL;
1340 struct xfs_dquot *olddquot = NULL;
1341 int code;
1342 int join_flags = 0;
1343
1344 trace_xfs_ioctl_setattr(ip);
1345
1346 code = xfs_ioctl_setattr_check_projid(ip, fa);
1347 if (code)
1348 return code;
1349
1350 /*
1351 * If disk quotas is on, we make sure that the dquots do exist on disk,
1352 * before we start any other transactions. Trying to do this later
1353 * is messy. We don't care to take a readlock to look at the ids
1354 * in inode here, because we can't hold it across the trans_reserve.
1355 * If the IDs do change before we take the ilock, we're covered
1356 * because the i_*dquot fields will get updated anyway.
1357 */
1358 if (XFS_IS_QUOTA_ON(mp)) {
1359 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1360 ip->i_d.di_gid, fa->fsx_projid,
1361 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1362 if (code)
1363 return code;
1364 }
1365
1366 /*
1367 * Changing DAX config may require inode locking for mapping
1368 * invalidation. These need to be held all the way to transaction commit
1369 * or cancel time, so need to be passed through to
1370 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1371 * appropriately.
1372 */
1373 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1374 if (code)
1375 goto error_free_dquots;
1376
1377 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1378 if (IS_ERR(tp)) {
1379 code = PTR_ERR(tp);
1380 goto error_free_dquots;
1381 }
1382
1383
1384 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1385 xfs_get_projid(ip) != fa->fsx_projid) {
1386 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1387 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1388 if (code) /* out of quota */
1389 goto error_trans_cancel;
1390 }
1391
1392 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1393 if (code)
1394 goto error_trans_cancel;
1395
1396 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1397 if (code)
1398 goto error_trans_cancel;
1399
1400 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1401 if (code)
1402 goto error_trans_cancel;
1403
1404 /*
1405 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1406 * overrides the following restrictions:
1407 *
1408 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1409 * successful return from chown()
1410 */
1411
1412 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1413 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1414 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1415
1416 /* Change the ownerships and register project quota modifications */
1417 if (xfs_get_projid(ip) != fa->fsx_projid) {
1418 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1419 olddquot = xfs_qm_vop_chown(tp, ip,
1420 &ip->i_pdquot, pdqp);
1421 }
1422 ASSERT(ip->i_d.di_version > 1);
1423 xfs_set_projid(ip, fa->fsx_projid);
1424 }
1425
1426 /*
1427 * Only set the extent size hint if we've already determined that the
1428 * extent size hint should be set on the inode. If no extent size flags
1429 * are set on the inode then unconditionally clear the extent size hint.
1430 */
1431 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1432 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1433 else
1434 ip->i_d.di_extsize = 0;
1435 if (ip->i_d.di_version == 3 &&
1436 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1437 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1438 mp->m_sb.sb_blocklog;
1439 else
1440 ip->i_d.di_cowextsize = 0;
1441
1442 code = xfs_trans_commit(tp);
1443
1444 /*
1445 * Release any dquot(s) the inode had kept before chown.
1446 */
1447 xfs_qm_dqrele(olddquot);
1448 xfs_qm_dqrele(udqp);
1449 xfs_qm_dqrele(pdqp);
1450
1451 return code;
1452
1453error_trans_cancel:
1454 xfs_trans_cancel(tp);
1455error_free_dquots:
1456 xfs_qm_dqrele(udqp);
1457 xfs_qm_dqrele(pdqp);
1458 return code;
1459}
1460
1461STATIC int
1462xfs_ioc_fssetxattr(
1463 xfs_inode_t *ip,
1464 struct file *filp,
1465 void __user *arg)
1466{
1467 struct fsxattr fa;
1468 int error;
1469
1470 if (copy_from_user(&fa, arg, sizeof(fa)))
1471 return -EFAULT;
1472
1473 error = mnt_want_write_file(filp);
1474 if (error)
1475 return error;
1476 error = xfs_ioctl_setattr(ip, &fa);
1477 mnt_drop_write_file(filp);
1478 return error;
1479}
1480
1481STATIC int
1482xfs_ioc_getxflags(
1483 xfs_inode_t *ip,
1484 void __user *arg)
1485{
1486 unsigned int flags;
1487
1488 flags = xfs_di2lxflags(ip->i_d.di_flags);
1489 if (copy_to_user(arg, &flags, sizeof(flags)))
1490 return -EFAULT;
1491 return 0;
1492}
1493
1494STATIC int
1495xfs_ioc_setxflags(
1496 struct xfs_inode *ip,
1497 struct file *filp,
1498 void __user *arg)
1499{
1500 struct xfs_trans *tp;
1501 struct fsxattr fa;
1502 unsigned int flags;
1503 int join_flags = 0;
1504 int error;
1505
1506 if (copy_from_user(&flags, arg, sizeof(flags)))
1507 return -EFAULT;
1508
1509 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1510 FS_NOATIME_FL | FS_NODUMP_FL | \
1511 FS_SYNC_FL))
1512 return -EOPNOTSUPP;
1513
1514 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1515
1516 error = mnt_want_write_file(filp);
1517 if (error)
1518 return error;
1519
1520 /*
1521 * Changing DAX config may require inode locking for mapping
1522 * invalidation. These need to be held all the way to transaction commit
1523 * or cancel time, so need to be passed through to
1524 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1525 * appropriately.
1526 */
1527 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1528 if (error)
1529 goto out_drop_write;
1530
1531 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1532 if (IS_ERR(tp)) {
1533 error = PTR_ERR(tp);
1534 goto out_drop_write;
1535 }
1536
1537 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1538 if (error) {
1539 xfs_trans_cancel(tp);
1540 goto out_drop_write;
1541 }
1542
1543 error = xfs_trans_commit(tp);
1544out_drop_write:
1545 mnt_drop_write_file(filp);
1546 return error;
1547}
1548
1549static bool
1550xfs_getbmap_format(
1551 struct kgetbmap *p,
1552 struct getbmapx __user *u,
1553 size_t recsize)
1554{
1555 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1556 put_user(p->bmv_block, &u->bmv_block) ||
1557 put_user(p->bmv_length, &u->bmv_length) ||
1558 put_user(0, &u->bmv_count) ||
1559 put_user(0, &u->bmv_entries))
1560 return false;
1561 if (recsize < sizeof(struct getbmapx))
1562 return true;
1563 if (put_user(0, &u->bmv_iflags) ||
1564 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1565 put_user(0, &u->bmv_unused1) ||
1566 put_user(0, &u->bmv_unused2))
1567 return false;
1568 return true;
1569}
1570
1571STATIC int
1572xfs_ioc_getbmap(
1573 struct file *file,
1574 unsigned int cmd,
1575 void __user *arg)
1576{
1577 struct getbmapx bmx = { 0 };
1578 struct kgetbmap *buf;
1579 size_t recsize;
1580 int error, i;
1581
1582 switch (cmd) {
1583 case XFS_IOC_GETBMAPA:
1584 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1585 /*FALLTHRU*/
1586 case XFS_IOC_GETBMAP:
1587 if (file->f_mode & FMODE_NOCMTIME)
1588 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1589 /* struct getbmap is a strict subset of struct getbmapx. */
1590 recsize = sizeof(struct getbmap);
1591 break;
1592 case XFS_IOC_GETBMAPX:
1593 recsize = sizeof(struct getbmapx);
1594 break;
1595 default:
1596 return -EINVAL;
1597 }
1598
1599 if (copy_from_user(&bmx, arg, recsize))
1600 return -EFAULT;
1601
1602 if (bmx.bmv_count < 2)
1603 return -EINVAL;
1604 if (bmx.bmv_count > ULONG_MAX / recsize)
1605 return -ENOMEM;
1606
1607 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1608 if (!buf)
1609 return -ENOMEM;
1610
1611 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1612 if (error)
1613 goto out_free_buf;
1614
1615 error = -EFAULT;
1616 if (copy_to_user(arg, &bmx, recsize))
1617 goto out_free_buf;
1618 arg += recsize;
1619
1620 for (i = 0; i < bmx.bmv_entries; i++) {
1621 if (!xfs_getbmap_format(buf + i, arg, recsize))
1622 goto out_free_buf;
1623 arg += recsize;
1624 }
1625
1626 error = 0;
1627out_free_buf:
1628 kmem_free(buf);
1629 return 0;
1630}
1631
1632struct getfsmap_info {
1633 struct xfs_mount *mp;
1634 struct fsmap_head __user *data;
1635 unsigned int idx;
1636 __u32 last_flags;
1637};
1638
1639STATIC int
1640xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1641{
1642 struct getfsmap_info *info = priv;
1643 struct fsmap fm;
1644
1645 trace_xfs_getfsmap_mapping(info->mp, xfm);
1646
1647 info->last_flags = xfm->fmr_flags;
1648 xfs_fsmap_from_internal(&fm, xfm);
1649 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1650 sizeof(struct fsmap)))
1651 return -EFAULT;
1652
1653 return 0;
1654}
1655
1656STATIC int
1657xfs_ioc_getfsmap(
1658 struct xfs_inode *ip,
1659 struct fsmap_head __user *arg)
1660{
1661 struct getfsmap_info info = { NULL };
1662 struct xfs_fsmap_head xhead = {0};
1663 struct fsmap_head head;
1664 bool aborted = false;
1665 int error;
1666
1667 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1668 return -EFAULT;
1669 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1670 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1671 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1672 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1673 sizeof(head.fmh_keys[1].fmr_reserved)))
1674 return -EINVAL;
1675
1676 xhead.fmh_iflags = head.fmh_iflags;
1677 xhead.fmh_count = head.fmh_count;
1678 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1679 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1680
1681 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1682 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1683
1684 info.mp = ip->i_mount;
1685 info.data = arg;
1686 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1687 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1688 error = 0;
1689 aborted = true;
1690 } else if (error)
1691 return error;
1692
1693 /* If we didn't abort, set the "last" flag in the last fmx */
1694 if (!aborted && info.idx) {
1695 info.last_flags |= FMR_OF_LAST;
1696 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1697 &info.last_flags, sizeof(info.last_flags)))
1698 return -EFAULT;
1699 }
1700
1701 /* copy back header */
1702 head.fmh_entries = xhead.fmh_entries;
1703 head.fmh_oflags = xhead.fmh_oflags;
1704 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1705 return -EFAULT;
1706
1707 return 0;
1708}
1709
1710STATIC int
1711xfs_ioc_scrub_metadata(
1712 struct xfs_inode *ip,
1713 void __user *arg)
1714{
1715 struct xfs_scrub_metadata scrub;
1716 int error;
1717
1718 if (!capable(CAP_SYS_ADMIN))
1719 return -EPERM;
1720
1721 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1722 return -EFAULT;
1723
1724 error = xfs_scrub_metadata(ip, &scrub);
1725 if (error)
1726 return error;
1727
1728 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1729 return -EFAULT;
1730
1731 return 0;
1732}
1733
1734int
1735xfs_ioc_swapext(
1736 xfs_swapext_t *sxp)
1737{
1738 xfs_inode_t *ip, *tip;
1739 struct fd f, tmp;
1740 int error = 0;
1741
1742 /* Pull information for the target fd */
1743 f = fdget((int)sxp->sx_fdtarget);
1744 if (!f.file) {
1745 error = -EINVAL;
1746 goto out;
1747 }
1748
1749 if (!(f.file->f_mode & FMODE_WRITE) ||
1750 !(f.file->f_mode & FMODE_READ) ||
1751 (f.file->f_flags & O_APPEND)) {
1752 error = -EBADF;
1753 goto out_put_file;
1754 }
1755
1756 tmp = fdget((int)sxp->sx_fdtmp);
1757 if (!tmp.file) {
1758 error = -EINVAL;
1759 goto out_put_file;
1760 }
1761
1762 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1763 !(tmp.file->f_mode & FMODE_READ) ||
1764 (tmp.file->f_flags & O_APPEND)) {
1765 error = -EBADF;
1766 goto out_put_tmp_file;
1767 }
1768
1769 if (IS_SWAPFILE(file_inode(f.file)) ||
1770 IS_SWAPFILE(file_inode(tmp.file))) {
1771 error = -EINVAL;
1772 goto out_put_tmp_file;
1773 }
1774
1775 /*
1776 * We need to ensure that the fds passed in point to XFS inodes
1777 * before we cast and access them as XFS structures as we have no
1778 * control over what the user passes us here.
1779 */
1780 if (f.file->f_op != &xfs_file_operations ||
1781 tmp.file->f_op != &xfs_file_operations) {
1782 error = -EINVAL;
1783 goto out_put_tmp_file;
1784 }
1785
1786 ip = XFS_I(file_inode(f.file));
1787 tip = XFS_I(file_inode(tmp.file));
1788
1789 if (ip->i_mount != tip->i_mount) {
1790 error = -EINVAL;
1791 goto out_put_tmp_file;
1792 }
1793
1794 if (ip->i_ino == tip->i_ino) {
1795 error = -EINVAL;
1796 goto out_put_tmp_file;
1797 }
1798
1799 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1800 error = -EIO;
1801 goto out_put_tmp_file;
1802 }
1803
1804 error = xfs_swap_extents(ip, tip, sxp);
1805
1806 out_put_tmp_file:
1807 fdput(tmp);
1808 out_put_file:
1809 fdput(f);
1810 out:
1811 return error;
1812}
1813
1814/*
1815 * Note: some of the ioctl's return positive numbers as a
1816 * byte count indicating success, such as readlink_by_handle.
1817 * So we don't "sign flip" like most other routines. This means
1818 * true errors need to be returned as a negative value.
1819 */
1820long
1821xfs_file_ioctl(
1822 struct file *filp,
1823 unsigned int cmd,
1824 unsigned long p)
1825{
1826 struct inode *inode = file_inode(filp);
1827 struct xfs_inode *ip = XFS_I(inode);
1828 struct xfs_mount *mp = ip->i_mount;
1829 void __user *arg = (void __user *)p;
1830 int error;
1831
1832 trace_xfs_file_ioctl(ip);
1833
1834 switch (cmd) {
1835 case FITRIM:
1836 return xfs_ioc_trim(mp, arg);
1837 case XFS_IOC_ALLOCSP:
1838 case XFS_IOC_FREESP:
1839 case XFS_IOC_RESVSP:
1840 case XFS_IOC_UNRESVSP:
1841 case XFS_IOC_ALLOCSP64:
1842 case XFS_IOC_FREESP64:
1843 case XFS_IOC_RESVSP64:
1844 case XFS_IOC_UNRESVSP64:
1845 case XFS_IOC_ZERO_RANGE: {
1846 xfs_flock64_t bf;
1847
1848 if (copy_from_user(&bf, arg, sizeof(bf)))
1849 return -EFAULT;
1850 return xfs_ioc_space(filp, cmd, &bf);
1851 }
1852 case XFS_IOC_DIOINFO: {
1853 struct dioattr da;
1854 xfs_buftarg_t *target =
1855 XFS_IS_REALTIME_INODE(ip) ?
1856 mp->m_rtdev_targp : mp->m_ddev_targp;
1857
1858 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1859 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1860
1861 if (copy_to_user(arg, &da, sizeof(da)))
1862 return -EFAULT;
1863 return 0;
1864 }
1865
1866 case XFS_IOC_FSBULKSTAT_SINGLE:
1867 case XFS_IOC_FSBULKSTAT:
1868 case XFS_IOC_FSINUMBERS:
1869 return xfs_ioc_bulkstat(mp, cmd, arg);
1870
1871 case XFS_IOC_FSGEOMETRY_V1:
1872 return xfs_ioc_fsgeometry_v1(mp, arg);
1873
1874 case XFS_IOC_FSGEOMETRY:
1875 return xfs_ioc_fsgeometry(mp, arg);
1876
1877 case XFS_IOC_GETVERSION:
1878 return put_user(inode->i_generation, (int __user *)arg);
1879
1880 case XFS_IOC_FSGETXATTR:
1881 return xfs_ioc_fsgetxattr(ip, 0, arg);
1882 case XFS_IOC_FSGETXATTRA:
1883 return xfs_ioc_fsgetxattr(ip, 1, arg);
1884 case XFS_IOC_FSSETXATTR:
1885 return xfs_ioc_fssetxattr(ip, filp, arg);
1886 case XFS_IOC_GETXFLAGS:
1887 return xfs_ioc_getxflags(ip, arg);
1888 case XFS_IOC_SETXFLAGS:
1889 return xfs_ioc_setxflags(ip, filp, arg);
1890
1891 case XFS_IOC_FSSETDM: {
1892 struct fsdmidata dmi;
1893
1894 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1895 return -EFAULT;
1896
1897 error = mnt_want_write_file(filp);
1898 if (error)
1899 return error;
1900
1901 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1902 dmi.fsd_dmstate);
1903 mnt_drop_write_file(filp);
1904 return error;
1905 }
1906
1907 case XFS_IOC_GETBMAP:
1908 case XFS_IOC_GETBMAPA:
1909 case XFS_IOC_GETBMAPX:
1910 return xfs_ioc_getbmap(filp, cmd, arg);
1911
1912 case FS_IOC_GETFSMAP:
1913 return xfs_ioc_getfsmap(ip, arg);
1914
1915 case XFS_IOC_SCRUB_METADATA:
1916 return xfs_ioc_scrub_metadata(ip, arg);
1917
1918 case XFS_IOC_FD_TO_HANDLE:
1919 case XFS_IOC_PATH_TO_HANDLE:
1920 case XFS_IOC_PATH_TO_FSHANDLE: {
1921 xfs_fsop_handlereq_t hreq;
1922
1923 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1924 return -EFAULT;
1925 return xfs_find_handle(cmd, &hreq);
1926 }
1927 case XFS_IOC_OPEN_BY_HANDLE: {
1928 xfs_fsop_handlereq_t hreq;
1929
1930 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1931 return -EFAULT;
1932 return xfs_open_by_handle(filp, &hreq);
1933 }
1934 case XFS_IOC_FSSETDM_BY_HANDLE:
1935 return xfs_fssetdm_by_handle(filp, arg);
1936
1937 case XFS_IOC_READLINK_BY_HANDLE: {
1938 xfs_fsop_handlereq_t hreq;
1939
1940 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1941 return -EFAULT;
1942 return xfs_readlink_by_handle(filp, &hreq);
1943 }
1944 case XFS_IOC_ATTRLIST_BY_HANDLE:
1945 return xfs_attrlist_by_handle(filp, arg);
1946
1947 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1948 return xfs_attrmulti_by_handle(filp, arg);
1949
1950 case XFS_IOC_SWAPEXT: {
1951 struct xfs_swapext sxp;
1952
1953 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1954 return -EFAULT;
1955 error = mnt_want_write_file(filp);
1956 if (error)
1957 return error;
1958 error = xfs_ioc_swapext(&sxp);
1959 mnt_drop_write_file(filp);
1960 return error;
1961 }
1962
1963 case XFS_IOC_FSCOUNTS: {
1964 xfs_fsop_counts_t out;
1965
1966 error = xfs_fs_counts(mp, &out);
1967 if (error)
1968 return error;
1969
1970 if (copy_to_user(arg, &out, sizeof(out)))
1971 return -EFAULT;
1972 return 0;
1973 }
1974
1975 case XFS_IOC_SET_RESBLKS: {
1976 xfs_fsop_resblks_t inout;
1977 uint64_t in;
1978
1979 if (!capable(CAP_SYS_ADMIN))
1980 return -EPERM;
1981
1982 if (mp->m_flags & XFS_MOUNT_RDONLY)
1983 return -EROFS;
1984
1985 if (copy_from_user(&inout, arg, sizeof(inout)))
1986 return -EFAULT;
1987
1988 error = mnt_want_write_file(filp);
1989 if (error)
1990 return error;
1991
1992 /* input parameter is passed in resblks field of structure */
1993 in = inout.resblks;
1994 error = xfs_reserve_blocks(mp, &in, &inout);
1995 mnt_drop_write_file(filp);
1996 if (error)
1997 return error;
1998
1999 if (copy_to_user(arg, &inout, sizeof(inout)))
2000 return -EFAULT;
2001 return 0;
2002 }
2003
2004 case XFS_IOC_GET_RESBLKS: {
2005 xfs_fsop_resblks_t out;
2006
2007 if (!capable(CAP_SYS_ADMIN))
2008 return -EPERM;
2009
2010 error = xfs_reserve_blocks(mp, NULL, &out);
2011 if (error)
2012 return error;
2013
2014 if (copy_to_user(arg, &out, sizeof(out)))
2015 return -EFAULT;
2016
2017 return 0;
2018 }
2019
2020 case XFS_IOC_FSGROWFSDATA: {
2021 xfs_growfs_data_t in;
2022
2023 if (copy_from_user(&in, arg, sizeof(in)))
2024 return -EFAULT;
2025
2026 error = mnt_want_write_file(filp);
2027 if (error)
2028 return error;
2029 error = xfs_growfs_data(mp, &in);
2030 mnt_drop_write_file(filp);
2031 return error;
2032 }
2033
2034 case XFS_IOC_FSGROWFSLOG: {
2035 xfs_growfs_log_t in;
2036
2037 if (copy_from_user(&in, arg, sizeof(in)))
2038 return -EFAULT;
2039
2040 error = mnt_want_write_file(filp);
2041 if (error)
2042 return error;
2043 error = xfs_growfs_log(mp, &in);
2044 mnt_drop_write_file(filp);
2045 return error;
2046 }
2047
2048 case XFS_IOC_FSGROWFSRT: {
2049 xfs_growfs_rt_t in;
2050
2051 if (copy_from_user(&in, arg, sizeof(in)))
2052 return -EFAULT;
2053
2054 error = mnt_want_write_file(filp);
2055 if (error)
2056 return error;
2057 error = xfs_growfs_rt(mp, &in);
2058 mnt_drop_write_file(filp);
2059 return error;
2060 }
2061
2062 case XFS_IOC_GOINGDOWN: {
2063 uint32_t in;
2064
2065 if (!capable(CAP_SYS_ADMIN))
2066 return -EPERM;
2067
2068 if (get_user(in, (uint32_t __user *)arg))
2069 return -EFAULT;
2070
2071 return xfs_fs_goingdown(mp, in);
2072 }
2073
2074 case XFS_IOC_ERROR_INJECTION: {
2075 xfs_error_injection_t in;
2076
2077 if (!capable(CAP_SYS_ADMIN))
2078 return -EPERM;
2079
2080 if (copy_from_user(&in, arg, sizeof(in)))
2081 return -EFAULT;
2082
2083 return xfs_errortag_add(mp, in.errtag);
2084 }
2085
2086 case XFS_IOC_ERROR_CLEARALL:
2087 if (!capable(CAP_SYS_ADMIN))
2088 return -EPERM;
2089
2090 return xfs_errortag_clearall(mp);
2091
2092 case XFS_IOC_FREE_EOFBLOCKS: {
2093 struct xfs_fs_eofblocks eofb;
2094 struct xfs_eofblocks keofb;
2095
2096 if (!capable(CAP_SYS_ADMIN))
2097 return -EPERM;
2098
2099 if (mp->m_flags & XFS_MOUNT_RDONLY)
2100 return -EROFS;
2101
2102 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2103 return -EFAULT;
2104
2105 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2106 if (error)
2107 return error;
2108
2109 return xfs_icache_free_eofblocks(mp, &keofb);
2110 }
2111
2112 default:
2113 return -ENOTTY;
2114 }
2115}