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_da_format.h"
19 #include "xfs_da_btree.h"
20 #include "xfs_attr.h"
21 #include "xfs_bmap.h"
22 #include "xfs_bmap_util.h"
23 #include "xfs_fsops.h"
24 #include "xfs_discard.h"
25 #include "xfs_quota.h"
26 #include "xfs_export.h"
27 #include "xfs_trace.h"
28 #include "xfs_icache.h"
29 #include "xfs_trans.h"
30 #include "xfs_acl.h"
31 #include "xfs_btree.h"
32 #include <linux/fsmap.h>
33 #include "xfs_fsmap.h"
34 #include "scrub/xfs_scrub.h"
35 #include "xfs_sb.h"
36 #include "xfs_ag.h"
37 #include "xfs_health.h"
38 #include "xfs_reflink.h"
39 #include "xfs_ioctl.h"
40 #include "xfs_xattr.h"
41
42 #include <linux/mount.h>
43 #include <linux/namei.h>
44 #include <linux/fileattr.h>
45
46 /*
47 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
48 * a file or fs handle.
49 *
50 * XFS_IOC_PATH_TO_FSHANDLE
51 * returns fs handle for a mount point or path within that mount point
52 * XFS_IOC_FD_TO_HANDLE
53 * returns full handle for a FD opened in user space
54 * XFS_IOC_PATH_TO_HANDLE
55 * returns full handle for a path
56 */
57 int
xfs_find_handle(unsigned int cmd,xfs_fsop_handlereq_t * hreq)58 xfs_find_handle(
59 unsigned int cmd,
60 xfs_fsop_handlereq_t *hreq)
61 {
62 int hsize;
63 xfs_handle_t handle;
64 struct inode *inode;
65 struct fd f = {NULL};
66 struct path path;
67 int error;
68 struct xfs_inode *ip;
69
70 if (cmd == XFS_IOC_FD_TO_HANDLE) {
71 f = fdget(hreq->fd);
72 if (!f.file)
73 return -EBADF;
74 inode = file_inode(f.file);
75 } else {
76 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
77 if (error)
78 return error;
79 inode = d_inode(path.dentry);
80 }
81 ip = XFS_I(inode);
82
83 /*
84 * We can only generate handles for inodes residing on a XFS filesystem,
85 * and only for regular files, directories or symbolic links.
86 */
87 error = -EINVAL;
88 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
89 goto out_put;
90
91 error = -EBADF;
92 if (!S_ISREG(inode->i_mode) &&
93 !S_ISDIR(inode->i_mode) &&
94 !S_ISLNK(inode->i_mode))
95 goto out_put;
96
97
98 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
99
100 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
101 /*
102 * This handle only contains an fsid, zero the rest.
103 */
104 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
105 hsize = sizeof(xfs_fsid_t);
106 } else {
107 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
108 sizeof(handle.ha_fid.fid_len);
109 handle.ha_fid.fid_pad = 0;
110 handle.ha_fid.fid_gen = inode->i_generation;
111 handle.ha_fid.fid_ino = ip->i_ino;
112 hsize = sizeof(xfs_handle_t);
113 }
114
115 error = -EFAULT;
116 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
117 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
118 goto out_put;
119
120 error = 0;
121
122 out_put:
123 if (cmd == XFS_IOC_FD_TO_HANDLE)
124 fdput(f);
125 else
126 path_put(&path);
127 return error;
128 }
129
130 /*
131 * No need to do permission checks on the various pathname components
132 * as the handle operations are privileged.
133 */
134 STATIC int
xfs_handle_acceptable(void * context,struct dentry * dentry)135 xfs_handle_acceptable(
136 void *context,
137 struct dentry *dentry)
138 {
139 return 1;
140 }
141
142 /*
143 * Convert userspace handle data into a dentry.
144 */
145 struct dentry *
xfs_handle_to_dentry(struct file * parfilp,void __user * uhandle,u32 hlen)146 xfs_handle_to_dentry(
147 struct file *parfilp,
148 void __user *uhandle,
149 u32 hlen)
150 {
151 xfs_handle_t handle;
152 struct xfs_fid64 fid;
153
154 /*
155 * Only allow handle opens under a directory.
156 */
157 if (!S_ISDIR(file_inode(parfilp)->i_mode))
158 return ERR_PTR(-ENOTDIR);
159
160 if (hlen != sizeof(xfs_handle_t))
161 return ERR_PTR(-EINVAL);
162 if (copy_from_user(&handle, uhandle, hlen))
163 return ERR_PTR(-EFAULT);
164 if (handle.ha_fid.fid_len !=
165 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
166 return ERR_PTR(-EINVAL);
167
168 memset(&fid, 0, sizeof(struct fid));
169 fid.ino = handle.ha_fid.fid_ino;
170 fid.gen = handle.ha_fid.fid_gen;
171
172 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
173 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
174 xfs_handle_acceptable, NULL);
175 }
176
177 STATIC struct dentry *
xfs_handlereq_to_dentry(struct file * parfilp,xfs_fsop_handlereq_t * hreq)178 xfs_handlereq_to_dentry(
179 struct file *parfilp,
180 xfs_fsop_handlereq_t *hreq)
181 {
182 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
183 }
184
185 int
xfs_open_by_handle(struct file * parfilp,xfs_fsop_handlereq_t * hreq)186 xfs_open_by_handle(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
189 {
190 const struct cred *cred = current_cred();
191 int error;
192 int fd;
193 int permflag;
194 struct file *filp;
195 struct inode *inode;
196 struct dentry *dentry;
197 fmode_t fmode;
198 struct path path;
199
200 if (!capable(CAP_SYS_ADMIN))
201 return -EPERM;
202
203 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
204 if (IS_ERR(dentry))
205 return PTR_ERR(dentry);
206 inode = d_inode(dentry);
207
208 /* Restrict xfs_open_by_handle to directories & regular files. */
209 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
210 error = -EPERM;
211 goto out_dput;
212 }
213
214 #if BITS_PER_LONG != 32
215 hreq->oflags |= O_LARGEFILE;
216 #endif
217
218 permflag = hreq->oflags;
219 fmode = OPEN_FMODE(permflag);
220 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
221 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
222 error = -EPERM;
223 goto out_dput;
224 }
225
226 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
227 error = -EPERM;
228 goto out_dput;
229 }
230
231 /* Can't write directories. */
232 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
233 error = -EISDIR;
234 goto out_dput;
235 }
236
237 fd = get_unused_fd_flags(0);
238 if (fd < 0) {
239 error = fd;
240 goto out_dput;
241 }
242
243 path.mnt = parfilp->f_path.mnt;
244 path.dentry = dentry;
245 filp = dentry_open(&path, hreq->oflags, cred);
246 dput(dentry);
247 if (IS_ERR(filp)) {
248 put_unused_fd(fd);
249 return PTR_ERR(filp);
250 }
251
252 if (S_ISREG(inode->i_mode)) {
253 filp->f_flags |= O_NOATIME;
254 filp->f_mode |= FMODE_NOCMTIME;
255 }
256
257 fd_install(fd, filp);
258 return fd;
259
260 out_dput:
261 dput(dentry);
262 return error;
263 }
264
265 int
xfs_readlink_by_handle(struct file * parfilp,xfs_fsop_handlereq_t * hreq)266 xfs_readlink_by_handle(
267 struct file *parfilp,
268 xfs_fsop_handlereq_t *hreq)
269 {
270 struct dentry *dentry;
271 __u32 olen;
272 int error;
273
274 if (!capable(CAP_SYS_ADMIN))
275 return -EPERM;
276
277 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
278 if (IS_ERR(dentry))
279 return PTR_ERR(dentry);
280
281 /* Restrict this handle operation to symlinks only. */
282 if (!d_is_symlink(dentry)) {
283 error = -EINVAL;
284 goto out_dput;
285 }
286
287 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
288 error = -EFAULT;
289 goto out_dput;
290 }
291
292 error = vfs_readlink(dentry, hreq->ohandle, olen);
293
294 out_dput:
295 dput(dentry);
296 return error;
297 }
298
299 /*
300 * Format an attribute and copy it out to the user's buffer.
301 * Take care to check values and protect against them changing later,
302 * we may be reading them directly out of a user buffer.
303 */
304 static void
xfs_ioc_attr_put_listent(struct xfs_attr_list_context * context,int flags,unsigned char * name,int namelen,int valuelen)305 xfs_ioc_attr_put_listent(
306 struct xfs_attr_list_context *context,
307 int flags,
308 unsigned char *name,
309 int namelen,
310 int valuelen)
311 {
312 struct xfs_attrlist *alist = context->buffer;
313 struct xfs_attrlist_ent *aep;
314 int arraytop;
315
316 ASSERT(!context->seen_enough);
317 ASSERT(context->count >= 0);
318 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
319 ASSERT(context->firstu >= sizeof(*alist));
320 ASSERT(context->firstu <= context->bufsize);
321
322 /*
323 * Only list entries in the right namespace.
324 */
325 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
326 return;
327
328 arraytop = sizeof(*alist) +
329 context->count * sizeof(alist->al_offset[0]);
330
331 /* decrement by the actual bytes used by the attr */
332 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
333 namelen + 1, sizeof(uint32_t));
334 if (context->firstu < arraytop) {
335 trace_xfs_attr_list_full(context);
336 alist->al_more = 1;
337 context->seen_enough = 1;
338 return;
339 }
340
341 aep = context->buffer + context->firstu;
342 aep->a_valuelen = valuelen;
343 memcpy(aep->a_name, name, namelen);
344 aep->a_name[namelen] = 0;
345 alist->al_offset[context->count++] = context->firstu;
346 alist->al_count = context->count;
347 trace_xfs_attr_list_add(context);
348 }
349
350 static unsigned int
xfs_attr_filter(u32 ioc_flags)351 xfs_attr_filter(
352 u32 ioc_flags)
353 {
354 if (ioc_flags & XFS_IOC_ATTR_ROOT)
355 return XFS_ATTR_ROOT;
356 if (ioc_flags & XFS_IOC_ATTR_SECURE)
357 return XFS_ATTR_SECURE;
358 return 0;
359 }
360
361 static unsigned int
xfs_attr_flags(u32 ioc_flags)362 xfs_attr_flags(
363 u32 ioc_flags)
364 {
365 if (ioc_flags & XFS_IOC_ATTR_CREATE)
366 return XATTR_CREATE;
367 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
368 return XATTR_REPLACE;
369 return 0;
370 }
371
372 int
xfs_ioc_attr_list(struct xfs_inode * dp,void __user * ubuf,size_t bufsize,int flags,struct xfs_attrlist_cursor __user * ucursor)373 xfs_ioc_attr_list(
374 struct xfs_inode *dp,
375 void __user *ubuf,
376 size_t bufsize,
377 int flags,
378 struct xfs_attrlist_cursor __user *ucursor)
379 {
380 struct xfs_attr_list_context context = { };
381 struct xfs_attrlist *alist;
382 void *buffer;
383 int error;
384
385 if (bufsize < sizeof(struct xfs_attrlist) ||
386 bufsize > XFS_XATTR_LIST_MAX)
387 return -EINVAL;
388
389 /*
390 * Reject flags, only allow namespaces.
391 */
392 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
393 return -EINVAL;
394 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
395 return -EINVAL;
396
397 /*
398 * Validate the cursor.
399 */
400 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
401 return -EFAULT;
402 if (context.cursor.pad1 || context.cursor.pad2)
403 return -EINVAL;
404 if (!context.cursor.initted &&
405 (context.cursor.hashval || context.cursor.blkno ||
406 context.cursor.offset))
407 return -EINVAL;
408
409 buffer = kvzalloc(bufsize, GFP_KERNEL);
410 if (!buffer)
411 return -ENOMEM;
412
413 /*
414 * Initialize the output buffer.
415 */
416 context.dp = dp;
417 context.resynch = 1;
418 context.attr_filter = xfs_attr_filter(flags);
419 context.buffer = buffer;
420 context.bufsize = round_down(bufsize, sizeof(uint32_t));
421 context.firstu = context.bufsize;
422 context.put_listent = xfs_ioc_attr_put_listent;
423
424 alist = context.buffer;
425 alist->al_count = 0;
426 alist->al_more = 0;
427 alist->al_offset[0] = context.bufsize;
428
429 error = xfs_attr_list(&context);
430 if (error)
431 goto out_free;
432
433 if (copy_to_user(ubuf, buffer, bufsize) ||
434 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
435 error = -EFAULT;
436 out_free:
437 kmem_free(buffer);
438 return error;
439 }
440
441 STATIC int
xfs_attrlist_by_handle(struct file * parfilp,struct xfs_fsop_attrlist_handlereq __user * p)442 xfs_attrlist_by_handle(
443 struct file *parfilp,
444 struct xfs_fsop_attrlist_handlereq __user *p)
445 {
446 struct xfs_fsop_attrlist_handlereq al_hreq;
447 struct dentry *dentry;
448 int error = -ENOMEM;
449
450 if (!capable(CAP_SYS_ADMIN))
451 return -EPERM;
452 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
453 return -EFAULT;
454
455 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
456 if (IS_ERR(dentry))
457 return PTR_ERR(dentry);
458
459 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
460 al_hreq.buflen, al_hreq.flags, &p->pos);
461 dput(dentry);
462 return error;
463 }
464
465 static int
xfs_attrmulti_attr_get(struct inode * inode,unsigned char * name,unsigned char __user * ubuf,uint32_t * len,uint32_t flags)466 xfs_attrmulti_attr_get(
467 struct inode *inode,
468 unsigned char *name,
469 unsigned char __user *ubuf,
470 uint32_t *len,
471 uint32_t flags)
472 {
473 struct xfs_da_args args = {
474 .dp = XFS_I(inode),
475 .attr_filter = xfs_attr_filter(flags),
476 .attr_flags = xfs_attr_flags(flags),
477 .name = name,
478 .namelen = strlen(name),
479 .valuelen = *len,
480 };
481 int error;
482
483 if (*len > XFS_XATTR_SIZE_MAX)
484 return -EINVAL;
485
486 error = xfs_attr_get(&args);
487 if (error)
488 goto out_kfree;
489
490 *len = args.valuelen;
491 if (copy_to_user(ubuf, args.value, args.valuelen))
492 error = -EFAULT;
493
494 out_kfree:
495 kmem_free(args.value);
496 return error;
497 }
498
499 static int
xfs_attrmulti_attr_set(struct inode * inode,unsigned char * name,const unsigned char __user * ubuf,uint32_t len,uint32_t flags)500 xfs_attrmulti_attr_set(
501 struct inode *inode,
502 unsigned char *name,
503 const unsigned char __user *ubuf,
504 uint32_t len,
505 uint32_t flags)
506 {
507 struct xfs_da_args args = {
508 .dp = XFS_I(inode),
509 .attr_filter = xfs_attr_filter(flags),
510 .attr_flags = xfs_attr_flags(flags),
511 .name = name,
512 .namelen = strlen(name),
513 };
514 int error;
515
516 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
517 return -EPERM;
518
519 if (ubuf) {
520 if (len > XFS_XATTR_SIZE_MAX)
521 return -EINVAL;
522 args.value = memdup_user(ubuf, len);
523 if (IS_ERR(args.value))
524 return PTR_ERR(args.value);
525 args.valuelen = len;
526 }
527
528 error = xfs_attr_change(&args);
529 if (!error && (flags & XFS_IOC_ATTR_ROOT))
530 xfs_forget_acl(inode, name);
531 kfree(args.value);
532 return error;
533 }
534
535 int
xfs_ioc_attrmulti_one(struct file * parfilp,struct inode * inode,uint32_t opcode,void __user * uname,void __user * value,uint32_t * len,uint32_t flags)536 xfs_ioc_attrmulti_one(
537 struct file *parfilp,
538 struct inode *inode,
539 uint32_t opcode,
540 void __user *uname,
541 void __user *value,
542 uint32_t *len,
543 uint32_t flags)
544 {
545 unsigned char *name;
546 int error;
547
548 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
549 return -EINVAL;
550
551 name = strndup_user(uname, MAXNAMELEN);
552 if (IS_ERR(name))
553 return PTR_ERR(name);
554
555 switch (opcode) {
556 case ATTR_OP_GET:
557 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
558 break;
559 case ATTR_OP_REMOVE:
560 value = NULL;
561 *len = 0;
562 fallthrough;
563 case ATTR_OP_SET:
564 error = mnt_want_write_file(parfilp);
565 if (error)
566 break;
567 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
568 mnt_drop_write_file(parfilp);
569 break;
570 default:
571 error = -EINVAL;
572 break;
573 }
574
575 kfree(name);
576 return error;
577 }
578
579 STATIC int
xfs_attrmulti_by_handle(struct file * parfilp,void __user * arg)580 xfs_attrmulti_by_handle(
581 struct file *parfilp,
582 void __user *arg)
583 {
584 int error;
585 xfs_attr_multiop_t *ops;
586 xfs_fsop_attrmulti_handlereq_t am_hreq;
587 struct dentry *dentry;
588 unsigned int i, size;
589
590 if (!capable(CAP_SYS_ADMIN))
591 return -EPERM;
592 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
593 return -EFAULT;
594
595 /* overflow check */
596 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
597 return -E2BIG;
598
599 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
600 if (IS_ERR(dentry))
601 return PTR_ERR(dentry);
602
603 error = -E2BIG;
604 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
605 if (!size || size > 16 * PAGE_SIZE)
606 goto out_dput;
607
608 ops = memdup_user(am_hreq.ops, size);
609 if (IS_ERR(ops)) {
610 error = PTR_ERR(ops);
611 goto out_dput;
612 }
613
614 error = 0;
615 for (i = 0; i < am_hreq.opcount; i++) {
616 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
617 d_inode(dentry), ops[i].am_opcode,
618 ops[i].am_attrname, ops[i].am_attrvalue,
619 &ops[i].am_length, ops[i].am_flags);
620 }
621
622 if (copy_to_user(am_hreq.ops, ops, size))
623 error = -EFAULT;
624
625 kfree(ops);
626 out_dput:
627 dput(dentry);
628 return error;
629 }
630
631 /* Return 0 on success or positive error */
632 int
xfs_fsbulkstat_one_fmt(struct xfs_ibulk * breq,const struct xfs_bulkstat * bstat)633 xfs_fsbulkstat_one_fmt(
634 struct xfs_ibulk *breq,
635 const struct xfs_bulkstat *bstat)
636 {
637 struct xfs_bstat bs1;
638
639 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
640 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
641 return -EFAULT;
642 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
643 }
644
645 int
xfs_fsinumbers_fmt(struct xfs_ibulk * breq,const struct xfs_inumbers * igrp)646 xfs_fsinumbers_fmt(
647 struct xfs_ibulk *breq,
648 const struct xfs_inumbers *igrp)
649 {
650 struct xfs_inogrp ig1;
651
652 xfs_inumbers_to_inogrp(&ig1, igrp);
653 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
654 return -EFAULT;
655 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
656 }
657
658 STATIC int
xfs_ioc_fsbulkstat(struct file * file,unsigned int cmd,void __user * arg)659 xfs_ioc_fsbulkstat(
660 struct file *file,
661 unsigned int cmd,
662 void __user *arg)
663 {
664 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
665 struct xfs_fsop_bulkreq bulkreq;
666 struct xfs_ibulk breq = {
667 .mp = mp,
668 .idmap = file_mnt_idmap(file),
669 .ocount = 0,
670 };
671 xfs_ino_t lastino;
672 int error;
673
674 /* done = 1 if there are more stats to get and if bulkstat */
675 /* should be called again (unused here, but used in dmapi) */
676
677 if (!capable(CAP_SYS_ADMIN))
678 return -EPERM;
679
680 if (xfs_is_shutdown(mp))
681 return -EIO;
682
683 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
684 return -EFAULT;
685
686 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
687 return -EFAULT;
688
689 if (bulkreq.icount <= 0)
690 return -EINVAL;
691
692 if (bulkreq.ubuffer == NULL)
693 return -EINVAL;
694
695 breq.ubuffer = bulkreq.ubuffer;
696 breq.icount = bulkreq.icount;
697
698 /*
699 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
700 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
701 * that *lastip contains either zero or the number of the last inode to
702 * be examined by the previous call and return results starting with
703 * the next inode after that. The new bulk request back end functions
704 * take the inode to start with, so we have to compute the startino
705 * parameter from lastino to maintain correct function. lastino == 0
706 * is a special case because it has traditionally meant "first inode
707 * in filesystem".
708 */
709 if (cmd == XFS_IOC_FSINUMBERS) {
710 breq.startino = lastino ? lastino + 1 : 0;
711 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
712 lastino = breq.startino - 1;
713 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
714 breq.startino = lastino;
715 breq.icount = 1;
716 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
717 } else { /* XFS_IOC_FSBULKSTAT */
718 breq.startino = lastino ? lastino + 1 : 0;
719 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
720 lastino = breq.startino - 1;
721 }
722
723 if (error)
724 return error;
725
726 if (bulkreq.lastip != NULL &&
727 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
728 return -EFAULT;
729
730 if (bulkreq.ocount != NULL &&
731 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
732 return -EFAULT;
733
734 return 0;
735 }
736
737 /* Return 0 on success or positive error */
738 static int
xfs_bulkstat_fmt(struct xfs_ibulk * breq,const struct xfs_bulkstat * bstat)739 xfs_bulkstat_fmt(
740 struct xfs_ibulk *breq,
741 const struct xfs_bulkstat *bstat)
742 {
743 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
744 return -EFAULT;
745 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
746 }
747
748 /*
749 * Check the incoming bulk request @hdr from userspace and initialize the
750 * internal @breq bulk request appropriately. Returns 0 if the bulk request
751 * should proceed; -ECANCELED if there's nothing to do; or the usual
752 * negative error code.
753 */
754 static int
xfs_bulk_ireq_setup(struct xfs_mount * mp,const struct xfs_bulk_ireq * hdr,struct xfs_ibulk * breq,void __user * ubuffer)755 xfs_bulk_ireq_setup(
756 struct xfs_mount *mp,
757 const struct xfs_bulk_ireq *hdr,
758 struct xfs_ibulk *breq,
759 void __user *ubuffer)
760 {
761 if (hdr->icount == 0 ||
762 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
763 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
764 return -EINVAL;
765
766 breq->startino = hdr->ino;
767 breq->ubuffer = ubuffer;
768 breq->icount = hdr->icount;
769 breq->ocount = 0;
770 breq->flags = 0;
771
772 /*
773 * The @ino parameter is a special value, so we must look it up here.
774 * We're not allowed to have IREQ_AGNO, and we only return one inode
775 * worth of data.
776 */
777 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
778 if (hdr->flags & XFS_BULK_IREQ_AGNO)
779 return -EINVAL;
780
781 switch (hdr->ino) {
782 case XFS_BULK_IREQ_SPECIAL_ROOT:
783 breq->startino = mp->m_sb.sb_rootino;
784 break;
785 default:
786 return -EINVAL;
787 }
788 breq->icount = 1;
789 }
790
791 /*
792 * The IREQ_AGNO flag means that we only want results from a given AG.
793 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
794 * beyond the specified AG then we return no results.
795 */
796 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
797 if (hdr->agno >= mp->m_sb.sb_agcount)
798 return -EINVAL;
799
800 if (breq->startino == 0)
801 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
802 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
803 return -EINVAL;
804
805 breq->flags |= XFS_IBULK_SAME_AG;
806
807 /* Asking for an inode past the end of the AG? We're done! */
808 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
809 return -ECANCELED;
810 } else if (hdr->agno)
811 return -EINVAL;
812
813 /* Asking for an inode past the end of the FS? We're done! */
814 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
815 return -ECANCELED;
816
817 if (hdr->flags & XFS_BULK_IREQ_NREXT64)
818 breq->flags |= XFS_IBULK_NREXT64;
819
820 return 0;
821 }
822
823 /*
824 * Update the userspace bulk request @hdr to reflect the end state of the
825 * internal bulk request @breq.
826 */
827 static void
xfs_bulk_ireq_teardown(struct xfs_bulk_ireq * hdr,struct xfs_ibulk * breq)828 xfs_bulk_ireq_teardown(
829 struct xfs_bulk_ireq *hdr,
830 struct xfs_ibulk *breq)
831 {
832 hdr->ino = breq->startino;
833 hdr->ocount = breq->ocount;
834 }
835
836 /* Handle the v5 bulkstat ioctl. */
837 STATIC int
xfs_ioc_bulkstat(struct file * file,unsigned int cmd,struct xfs_bulkstat_req __user * arg)838 xfs_ioc_bulkstat(
839 struct file *file,
840 unsigned int cmd,
841 struct xfs_bulkstat_req __user *arg)
842 {
843 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
844 struct xfs_bulk_ireq hdr;
845 struct xfs_ibulk breq = {
846 .mp = mp,
847 .idmap = file_mnt_idmap(file),
848 };
849 int error;
850
851 if (!capable(CAP_SYS_ADMIN))
852 return -EPERM;
853
854 if (xfs_is_shutdown(mp))
855 return -EIO;
856
857 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
858 return -EFAULT;
859
860 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
861 if (error == -ECANCELED)
862 goto out_teardown;
863 if (error < 0)
864 return error;
865
866 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
867 if (error)
868 return error;
869
870 out_teardown:
871 xfs_bulk_ireq_teardown(&hdr, &breq);
872 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
873 return -EFAULT;
874
875 return 0;
876 }
877
878 STATIC int
xfs_inumbers_fmt(struct xfs_ibulk * breq,const struct xfs_inumbers * igrp)879 xfs_inumbers_fmt(
880 struct xfs_ibulk *breq,
881 const struct xfs_inumbers *igrp)
882 {
883 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
884 return -EFAULT;
885 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
886 }
887
888 /* Handle the v5 inumbers ioctl. */
889 STATIC int
xfs_ioc_inumbers(struct xfs_mount * mp,unsigned int cmd,struct xfs_inumbers_req __user * arg)890 xfs_ioc_inumbers(
891 struct xfs_mount *mp,
892 unsigned int cmd,
893 struct xfs_inumbers_req __user *arg)
894 {
895 struct xfs_bulk_ireq hdr;
896 struct xfs_ibulk breq = {
897 .mp = mp,
898 };
899 int error;
900
901 if (!capable(CAP_SYS_ADMIN))
902 return -EPERM;
903
904 if (xfs_is_shutdown(mp))
905 return -EIO;
906
907 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
908 return -EFAULT;
909
910 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
911 if (error == -ECANCELED)
912 goto out_teardown;
913 if (error < 0)
914 return error;
915
916 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
917 if (error)
918 return error;
919
920 out_teardown:
921 xfs_bulk_ireq_teardown(&hdr, &breq);
922 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
923 return -EFAULT;
924
925 return 0;
926 }
927
928 STATIC int
xfs_ioc_fsgeometry(struct xfs_mount * mp,void __user * arg,int struct_version)929 xfs_ioc_fsgeometry(
930 struct xfs_mount *mp,
931 void __user *arg,
932 int struct_version)
933 {
934 struct xfs_fsop_geom fsgeo;
935 size_t len;
936
937 xfs_fs_geometry(mp, &fsgeo, struct_version);
938
939 if (struct_version <= 3)
940 len = sizeof(struct xfs_fsop_geom_v1);
941 else if (struct_version == 4)
942 len = sizeof(struct xfs_fsop_geom_v4);
943 else {
944 xfs_fsop_geom_health(mp, &fsgeo);
945 len = sizeof(fsgeo);
946 }
947
948 if (copy_to_user(arg, &fsgeo, len))
949 return -EFAULT;
950 return 0;
951 }
952
953 STATIC int
xfs_ioc_ag_geometry(struct xfs_mount * mp,void __user * arg)954 xfs_ioc_ag_geometry(
955 struct xfs_mount *mp,
956 void __user *arg)
957 {
958 struct xfs_perag *pag;
959 struct xfs_ag_geometry ageo;
960 int error;
961
962 if (copy_from_user(&ageo, arg, sizeof(ageo)))
963 return -EFAULT;
964 if (ageo.ag_flags)
965 return -EINVAL;
966 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
967 return -EINVAL;
968
969 pag = xfs_perag_get(mp, ageo.ag_number);
970 if (!pag)
971 return -EINVAL;
972
973 error = xfs_ag_get_geometry(pag, &ageo);
974 xfs_perag_put(pag);
975 if (error)
976 return error;
977
978 if (copy_to_user(arg, &ageo, sizeof(ageo)))
979 return -EFAULT;
980 return 0;
981 }
982
983 /*
984 * Linux extended inode flags interface.
985 */
986
987 static void
xfs_fill_fsxattr(struct xfs_inode * ip,int whichfork,struct fileattr * fa)988 xfs_fill_fsxattr(
989 struct xfs_inode *ip,
990 int whichfork,
991 struct fileattr *fa)
992 {
993 struct xfs_mount *mp = ip->i_mount;
994 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
995
996 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
997
998 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
999 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1000 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
1001 /*
1002 * Don't let a misaligned extent size hint on a directory
1003 * escape to userspace if it won't pass the setattr checks
1004 * later.
1005 */
1006 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
1007 ip->i_extsize % mp->m_sb.sb_rextsize > 0) {
1008 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
1009 FS_XFLAG_EXTSZINHERIT);
1010 fa->fsx_extsize = 0;
1011 } else {
1012 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1013 }
1014 }
1015
1016 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1017 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
1018 fa->fsx_projid = ip->i_projid;
1019 if (ifp && !xfs_need_iread_extents(ifp))
1020 fa->fsx_nextents = xfs_iext_count(ifp);
1021 else
1022 fa->fsx_nextents = xfs_ifork_nextents(ifp);
1023 }
1024
1025 STATIC int
xfs_ioc_fsgetxattra(xfs_inode_t * ip,void __user * arg)1026 xfs_ioc_fsgetxattra(
1027 xfs_inode_t *ip,
1028 void __user *arg)
1029 {
1030 struct fileattr fa;
1031
1032 xfs_ilock(ip, XFS_ILOCK_SHARED);
1033 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
1034 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1035
1036 return copy_fsxattr_to_user(&fa, arg);
1037 }
1038
1039 int
xfs_fileattr_get(struct dentry * dentry,struct fileattr * fa)1040 xfs_fileattr_get(
1041 struct dentry *dentry,
1042 struct fileattr *fa)
1043 {
1044 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1045
1046 if (d_is_special(dentry))
1047 return -ENOTTY;
1048
1049 xfs_ilock(ip, XFS_ILOCK_SHARED);
1050 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
1051 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1052
1053 return 0;
1054 }
1055
1056 STATIC uint16_t
xfs_flags2diflags(struct xfs_inode * ip,unsigned int xflags)1057 xfs_flags2diflags(
1058 struct xfs_inode *ip,
1059 unsigned int xflags)
1060 {
1061 /* can't set PREALLOC this way, just preserve it */
1062 uint16_t di_flags =
1063 (ip->i_diflags & XFS_DIFLAG_PREALLOC);
1064
1065 if (xflags & FS_XFLAG_IMMUTABLE)
1066 di_flags |= XFS_DIFLAG_IMMUTABLE;
1067 if (xflags & FS_XFLAG_APPEND)
1068 di_flags |= XFS_DIFLAG_APPEND;
1069 if (xflags & FS_XFLAG_SYNC)
1070 di_flags |= XFS_DIFLAG_SYNC;
1071 if (xflags & FS_XFLAG_NOATIME)
1072 di_flags |= XFS_DIFLAG_NOATIME;
1073 if (xflags & FS_XFLAG_NODUMP)
1074 di_flags |= XFS_DIFLAG_NODUMP;
1075 if (xflags & FS_XFLAG_NODEFRAG)
1076 di_flags |= XFS_DIFLAG_NODEFRAG;
1077 if (xflags & FS_XFLAG_FILESTREAM)
1078 di_flags |= XFS_DIFLAG_FILESTREAM;
1079 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1080 if (xflags & FS_XFLAG_RTINHERIT)
1081 di_flags |= XFS_DIFLAG_RTINHERIT;
1082 if (xflags & FS_XFLAG_NOSYMLINKS)
1083 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1084 if (xflags & FS_XFLAG_EXTSZINHERIT)
1085 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1086 if (xflags & FS_XFLAG_PROJINHERIT)
1087 di_flags |= XFS_DIFLAG_PROJINHERIT;
1088 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1089 if (xflags & FS_XFLAG_REALTIME)
1090 di_flags |= XFS_DIFLAG_REALTIME;
1091 if (xflags & FS_XFLAG_EXTSIZE)
1092 di_flags |= XFS_DIFLAG_EXTSIZE;
1093 }
1094
1095 return di_flags;
1096 }
1097
1098 STATIC uint64_t
xfs_flags2diflags2(struct xfs_inode * ip,unsigned int xflags)1099 xfs_flags2diflags2(
1100 struct xfs_inode *ip,
1101 unsigned int xflags)
1102 {
1103 uint64_t di_flags2 =
1104 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
1105 XFS_DIFLAG2_BIGTIME |
1106 XFS_DIFLAG2_NREXT64));
1107
1108 if (xflags & FS_XFLAG_DAX)
1109 di_flags2 |= XFS_DIFLAG2_DAX;
1110 if (xflags & FS_XFLAG_COWEXTSIZE)
1111 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1112
1113 return di_flags2;
1114 }
1115
1116 static int
xfs_ioctl_setattr_xflags(struct xfs_trans * tp,struct xfs_inode * ip,struct fileattr * fa)1117 xfs_ioctl_setattr_xflags(
1118 struct xfs_trans *tp,
1119 struct xfs_inode *ip,
1120 struct fileattr *fa)
1121 {
1122 struct xfs_mount *mp = ip->i_mount;
1123 bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME);
1124 uint64_t i_flags2;
1125
1126 if (rtflag != XFS_IS_REALTIME_INODE(ip)) {
1127 /* Can't change realtime flag if any extents are allocated. */
1128 if (ip->i_df.if_nextents || ip->i_delayed_blks)
1129 return -EINVAL;
1130 }
1131
1132 if (rtflag) {
1133 /* If realtime flag is set then must have realtime device */
1134 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1135 (ip->i_extsize % mp->m_sb.sb_rextsize))
1136 return -EINVAL;
1137
1138 /* Clear reflink if we are actually able to set the rt flag. */
1139 if (xfs_is_reflink_inode(ip))
1140 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
1141 }
1142
1143 /* diflags2 only valid for v3 inodes. */
1144 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1145 if (i_flags2 && !xfs_has_v3inodes(mp))
1146 return -EINVAL;
1147
1148 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1149 ip->i_diflags2 = i_flags2;
1150
1151 xfs_diflags_to_iflags(ip, false);
1152
1153 /*
1154 * Make the stable writes flag match that of the device the inode
1155 * resides on when flipping the RT flag.
1156 */
1157 if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode))
1158 xfs_update_stable_writes(ip);
1159
1160 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1161 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1162 XFS_STATS_INC(mp, xs_ig_attrchg);
1163 return 0;
1164 }
1165
1166 static void
xfs_ioctl_setattr_prepare_dax(struct xfs_inode * ip,struct fileattr * fa)1167 xfs_ioctl_setattr_prepare_dax(
1168 struct xfs_inode *ip,
1169 struct fileattr *fa)
1170 {
1171 struct xfs_mount *mp = ip->i_mount;
1172 struct inode *inode = VFS_I(ip);
1173
1174 if (S_ISDIR(inode->i_mode))
1175 return;
1176
1177 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
1178 return;
1179
1180 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1181 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
1182 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1183 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
1184 d_mark_dontcache(inode);
1185 }
1186
1187 /*
1188 * Set up the transaction structure for the setattr operation, checking that we
1189 * have permission to do so. On success, return a clean transaction and the
1190 * inode locked exclusively ready for further operation specific checks. On
1191 * failure, return an error without modifying or locking the inode.
1192 */
1193 static struct xfs_trans *
xfs_ioctl_setattr_get_trans(struct xfs_inode * ip,struct xfs_dquot * pdqp)1194 xfs_ioctl_setattr_get_trans(
1195 struct xfs_inode *ip,
1196 struct xfs_dquot *pdqp)
1197 {
1198 struct xfs_mount *mp = ip->i_mount;
1199 struct xfs_trans *tp;
1200 int error = -EROFS;
1201
1202 if (xfs_is_readonly(mp))
1203 goto out_error;
1204 error = -EIO;
1205 if (xfs_is_shutdown(mp))
1206 goto out_error;
1207
1208 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
1209 has_capability_noaudit(current, CAP_FOWNER), &tp);
1210 if (error)
1211 goto out_error;
1212
1213 if (xfs_has_wsync(mp))
1214 xfs_trans_set_sync(tp);
1215
1216 return tp;
1217
1218 out_error:
1219 return ERR_PTR(error);
1220 }
1221
1222 /*
1223 * Validate a proposed extent size hint. For regular files, the hint can only
1224 * be changed if no extents are allocated.
1225 */
1226 static int
xfs_ioctl_setattr_check_extsize(struct xfs_inode * ip,struct fileattr * fa)1227 xfs_ioctl_setattr_check_extsize(
1228 struct xfs_inode *ip,
1229 struct fileattr *fa)
1230 {
1231 struct xfs_mount *mp = ip->i_mount;
1232 xfs_failaddr_t failaddr;
1233 uint16_t new_diflags;
1234
1235 if (!fa->fsx_valid)
1236 return 0;
1237
1238 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1239 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
1240 return -EINVAL;
1241
1242 if (fa->fsx_extsize & mp->m_blockmask)
1243 return -EINVAL;
1244
1245 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1246
1247 /*
1248 * Inode verifiers do not check that the extent size hint is an integer
1249 * multiple of the rt extent size on a directory with both rtinherit
1250 * and extszinherit flags set. Don't let sysadmins misconfigure
1251 * directories.
1252 */
1253 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
1254 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
1255 unsigned int rtextsize_bytes;
1256
1257 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
1258 if (fa->fsx_extsize % rtextsize_bytes)
1259 return -EINVAL;
1260 }
1261
1262 failaddr = xfs_inode_validate_extsize(ip->i_mount,
1263 XFS_B_TO_FSB(mp, fa->fsx_extsize),
1264 VFS_I(ip)->i_mode, new_diflags);
1265 return failaddr != NULL ? -EINVAL : 0;
1266 }
1267
1268 static int
xfs_ioctl_setattr_check_cowextsize(struct xfs_inode * ip,struct fileattr * fa)1269 xfs_ioctl_setattr_check_cowextsize(
1270 struct xfs_inode *ip,
1271 struct fileattr *fa)
1272 {
1273 struct xfs_mount *mp = ip->i_mount;
1274 xfs_failaddr_t failaddr;
1275 uint64_t new_diflags2;
1276 uint16_t new_diflags;
1277
1278 if (!fa->fsx_valid)
1279 return 0;
1280
1281 if (fa->fsx_cowextsize & mp->m_blockmask)
1282 return -EINVAL;
1283
1284 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1285 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1286
1287 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
1288 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
1289 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
1290 return failaddr != NULL ? -EINVAL : 0;
1291 }
1292
1293 static int
xfs_ioctl_setattr_check_projid(struct xfs_inode * ip,struct fileattr * fa)1294 xfs_ioctl_setattr_check_projid(
1295 struct xfs_inode *ip,
1296 struct fileattr *fa)
1297 {
1298 if (!fa->fsx_valid)
1299 return 0;
1300
1301 /* Disallow 32bit project ids if 32bit IDs are not enabled. */
1302 if (fa->fsx_projid > (uint16_t)-1 &&
1303 !xfs_has_projid32(ip->i_mount))
1304 return -EINVAL;
1305 return 0;
1306 }
1307
1308 int
xfs_fileattr_set(struct mnt_idmap * idmap,struct dentry * dentry,struct fileattr * fa)1309 xfs_fileattr_set(
1310 struct mnt_idmap *idmap,
1311 struct dentry *dentry,
1312 struct fileattr *fa)
1313 {
1314 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1315 struct xfs_mount *mp = ip->i_mount;
1316 struct xfs_trans *tp;
1317 struct xfs_dquot *pdqp = NULL;
1318 struct xfs_dquot *olddquot = NULL;
1319 int error;
1320
1321 trace_xfs_ioctl_setattr(ip);
1322
1323 if (d_is_special(dentry))
1324 return -ENOTTY;
1325
1326 if (!fa->fsx_valid) {
1327 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1328 FS_NOATIME_FL | FS_NODUMP_FL |
1329 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1330 return -EOPNOTSUPP;
1331 }
1332
1333 error = xfs_ioctl_setattr_check_projid(ip, fa);
1334 if (error)
1335 return error;
1336
1337 /*
1338 * If disk quotas is on, we make sure that the dquots do exist on disk,
1339 * before we start any other transactions. Trying to do this later
1340 * is messy. We don't care to take a readlock to look at the ids
1341 * in inode here, because we can't hold it across the trans_reserve.
1342 * If the IDs do change before we take the ilock, we're covered
1343 * because the i_*dquot fields will get updated anyway.
1344 */
1345 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
1346 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1347 VFS_I(ip)->i_gid, fa->fsx_projid,
1348 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1349 if (error)
1350 return error;
1351 }
1352
1353 xfs_ioctl_setattr_prepare_dax(ip, fa);
1354
1355 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
1356 if (IS_ERR(tp)) {
1357 error = PTR_ERR(tp);
1358 goto error_free_dquots;
1359 }
1360
1361 error = xfs_ioctl_setattr_check_extsize(ip, fa);
1362 if (error)
1363 goto error_trans_cancel;
1364
1365 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1366 if (error)
1367 goto error_trans_cancel;
1368
1369 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1370 if (error)
1371 goto error_trans_cancel;
1372
1373 if (!fa->fsx_valid)
1374 goto skip_xattr;
1375 /*
1376 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1377 * overrides the following restrictions:
1378 *
1379 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1380 * successful return from chown()
1381 */
1382
1383 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1384 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID))
1385 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1386
1387 /* Change the ownerships and register project quota modifications */
1388 if (ip->i_projid != fa->fsx_projid) {
1389 if (XFS_IS_PQUOTA_ON(mp)) {
1390 olddquot = xfs_qm_vop_chown(tp, ip,
1391 &ip->i_pdquot, pdqp);
1392 }
1393 ip->i_projid = fa->fsx_projid;
1394 }
1395
1396 /*
1397 * Only set the extent size hint if we've already determined that the
1398 * extent size hint should be set on the inode. If no extent size flags
1399 * are set on the inode then unconditionally clear the extent size hint.
1400 */
1401 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1402 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1403 else
1404 ip->i_extsize = 0;
1405
1406 if (xfs_has_v3inodes(mp)) {
1407 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1408 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1409 else
1410 ip->i_cowextsize = 0;
1411 }
1412
1413 skip_xattr:
1414 error = xfs_trans_commit(tp);
1415
1416 /*
1417 * Release any dquot(s) the inode had kept before chown.
1418 */
1419 xfs_qm_dqrele(olddquot);
1420 xfs_qm_dqrele(pdqp);
1421
1422 return error;
1423
1424 error_trans_cancel:
1425 xfs_trans_cancel(tp);
1426 error_free_dquots:
1427 xfs_qm_dqrele(pdqp);
1428 return error;
1429 }
1430
1431 static bool
xfs_getbmap_format(struct kgetbmap * p,struct getbmapx __user * u,size_t recsize)1432 xfs_getbmap_format(
1433 struct kgetbmap *p,
1434 struct getbmapx __user *u,
1435 size_t recsize)
1436 {
1437 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1438 put_user(p->bmv_block, &u->bmv_block) ||
1439 put_user(p->bmv_length, &u->bmv_length) ||
1440 put_user(0, &u->bmv_count) ||
1441 put_user(0, &u->bmv_entries))
1442 return false;
1443 if (recsize < sizeof(struct getbmapx))
1444 return true;
1445 if (put_user(0, &u->bmv_iflags) ||
1446 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1447 put_user(0, &u->bmv_unused1) ||
1448 put_user(0, &u->bmv_unused2))
1449 return false;
1450 return true;
1451 }
1452
1453 STATIC int
xfs_ioc_getbmap(struct file * file,unsigned int cmd,void __user * arg)1454 xfs_ioc_getbmap(
1455 struct file *file,
1456 unsigned int cmd,
1457 void __user *arg)
1458 {
1459 struct getbmapx bmx = { 0 };
1460 struct kgetbmap *buf;
1461 size_t recsize;
1462 int error, i;
1463
1464 switch (cmd) {
1465 case XFS_IOC_GETBMAPA:
1466 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1467 fallthrough;
1468 case XFS_IOC_GETBMAP:
1469 /* struct getbmap is a strict subset of struct getbmapx. */
1470 recsize = sizeof(struct getbmap);
1471 break;
1472 case XFS_IOC_GETBMAPX:
1473 recsize = sizeof(struct getbmapx);
1474 break;
1475 default:
1476 return -EINVAL;
1477 }
1478
1479 if (copy_from_user(&bmx, arg, recsize))
1480 return -EFAULT;
1481
1482 if (bmx.bmv_count < 2)
1483 return -EINVAL;
1484 if (bmx.bmv_count >= INT_MAX / recsize)
1485 return -ENOMEM;
1486
1487 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
1488 if (!buf)
1489 return -ENOMEM;
1490
1491 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1492 if (error)
1493 goto out_free_buf;
1494
1495 error = -EFAULT;
1496 if (copy_to_user(arg, &bmx, recsize))
1497 goto out_free_buf;
1498 arg += recsize;
1499
1500 for (i = 0; i < bmx.bmv_entries; i++) {
1501 if (!xfs_getbmap_format(buf + i, arg, recsize))
1502 goto out_free_buf;
1503 arg += recsize;
1504 }
1505
1506 error = 0;
1507 out_free_buf:
1508 kmem_free(buf);
1509 return error;
1510 }
1511
1512 STATIC int
xfs_ioc_getfsmap(struct xfs_inode * ip,struct fsmap_head __user * arg)1513 xfs_ioc_getfsmap(
1514 struct xfs_inode *ip,
1515 struct fsmap_head __user *arg)
1516 {
1517 struct xfs_fsmap_head xhead = {0};
1518 struct fsmap_head head;
1519 struct fsmap *recs;
1520 unsigned int count;
1521 __u32 last_flags = 0;
1522 bool done = false;
1523 int error;
1524
1525 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1526 return -EFAULT;
1527 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1528 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1529 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1530 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1531 sizeof(head.fmh_keys[1].fmr_reserved)))
1532 return -EINVAL;
1533
1534 /*
1535 * Use an internal memory buffer so that we don't have to copy fsmap
1536 * data to userspace while holding locks. Start by trying to allocate
1537 * up to 128k for the buffer, but fall back to a single page if needed.
1538 */
1539 count = min_t(unsigned int, head.fmh_count,
1540 131072 / sizeof(struct fsmap));
1541 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
1542 if (!recs) {
1543 count = min_t(unsigned int, head.fmh_count,
1544 PAGE_SIZE / sizeof(struct fsmap));
1545 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
1546 if (!recs)
1547 return -ENOMEM;
1548 }
1549
1550 xhead.fmh_iflags = head.fmh_iflags;
1551 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1552 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1553
1554 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1555 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1556
1557 head.fmh_entries = 0;
1558 do {
1559 struct fsmap __user *user_recs;
1560 struct fsmap *last_rec;
1561
1562 user_recs = &arg->fmh_recs[head.fmh_entries];
1563 xhead.fmh_entries = 0;
1564 xhead.fmh_count = min_t(unsigned int, count,
1565 head.fmh_count - head.fmh_entries);
1566
1567 /* Run query, record how many entries we got. */
1568 error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1569 switch (error) {
1570 case 0:
1571 /*
1572 * There are no more records in the result set. Copy
1573 * whatever we got to userspace and break out.
1574 */
1575 done = true;
1576 break;
1577 case -ECANCELED:
1578 /*
1579 * The internal memory buffer is full. Copy whatever
1580 * records we got to userspace and go again if we have
1581 * not yet filled the userspace buffer.
1582 */
1583 error = 0;
1584 break;
1585 default:
1586 goto out_free;
1587 }
1588 head.fmh_entries += xhead.fmh_entries;
1589 head.fmh_oflags = xhead.fmh_oflags;
1590
1591 /*
1592 * If the caller wanted a record count or there aren't any
1593 * new records to return, we're done.
1594 */
1595 if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1596 break;
1597
1598 /* Copy all the records we got out to userspace. */
1599 if (copy_to_user(user_recs, recs,
1600 xhead.fmh_entries * sizeof(struct fsmap))) {
1601 error = -EFAULT;
1602 goto out_free;
1603 }
1604
1605 /* Remember the last record flags we copied to userspace. */
1606 last_rec = &recs[xhead.fmh_entries - 1];
1607 last_flags = last_rec->fmr_flags;
1608
1609 /* Set up the low key for the next iteration. */
1610 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1611 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1612 } while (!done && head.fmh_entries < head.fmh_count);
1613
1614 /*
1615 * If there are no more records in the query result set and we're not
1616 * in counting mode, mark the last record returned with the LAST flag.
1617 */
1618 if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1619 struct fsmap __user *user_rec;
1620
1621 last_flags |= FMR_OF_LAST;
1622 user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1623
1624 if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1625 sizeof(last_flags))) {
1626 error = -EFAULT;
1627 goto out_free;
1628 }
1629 }
1630
1631 /* copy back header */
1632 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1633 error = -EFAULT;
1634 goto out_free;
1635 }
1636
1637 out_free:
1638 kmem_free(recs);
1639 return error;
1640 }
1641
1642 STATIC int
xfs_ioc_scrub_metadata(struct file * file,void __user * arg)1643 xfs_ioc_scrub_metadata(
1644 struct file *file,
1645 void __user *arg)
1646 {
1647 struct xfs_scrub_metadata scrub;
1648 int error;
1649
1650 if (!capable(CAP_SYS_ADMIN))
1651 return -EPERM;
1652
1653 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1654 return -EFAULT;
1655
1656 error = xfs_scrub_metadata(file, &scrub);
1657 if (error)
1658 return error;
1659
1660 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1661 return -EFAULT;
1662
1663 return 0;
1664 }
1665
1666 int
xfs_ioc_swapext(xfs_swapext_t * sxp)1667 xfs_ioc_swapext(
1668 xfs_swapext_t *sxp)
1669 {
1670 xfs_inode_t *ip, *tip;
1671 struct fd f, tmp;
1672 int error = 0;
1673
1674 /* Pull information for the target fd */
1675 f = fdget((int)sxp->sx_fdtarget);
1676 if (!f.file) {
1677 error = -EINVAL;
1678 goto out;
1679 }
1680
1681 if (!(f.file->f_mode & FMODE_WRITE) ||
1682 !(f.file->f_mode & FMODE_READ) ||
1683 (f.file->f_flags & O_APPEND)) {
1684 error = -EBADF;
1685 goto out_put_file;
1686 }
1687
1688 tmp = fdget((int)sxp->sx_fdtmp);
1689 if (!tmp.file) {
1690 error = -EINVAL;
1691 goto out_put_file;
1692 }
1693
1694 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1695 !(tmp.file->f_mode & FMODE_READ) ||
1696 (tmp.file->f_flags & O_APPEND)) {
1697 error = -EBADF;
1698 goto out_put_tmp_file;
1699 }
1700
1701 if (IS_SWAPFILE(file_inode(f.file)) ||
1702 IS_SWAPFILE(file_inode(tmp.file))) {
1703 error = -EINVAL;
1704 goto out_put_tmp_file;
1705 }
1706
1707 /*
1708 * We need to ensure that the fds passed in point to XFS inodes
1709 * before we cast and access them as XFS structures as we have no
1710 * control over what the user passes us here.
1711 */
1712 if (f.file->f_op != &xfs_file_operations ||
1713 tmp.file->f_op != &xfs_file_operations) {
1714 error = -EINVAL;
1715 goto out_put_tmp_file;
1716 }
1717
1718 ip = XFS_I(file_inode(f.file));
1719 tip = XFS_I(file_inode(tmp.file));
1720
1721 if (ip->i_mount != tip->i_mount) {
1722 error = -EINVAL;
1723 goto out_put_tmp_file;
1724 }
1725
1726 if (ip->i_ino == tip->i_ino) {
1727 error = -EINVAL;
1728 goto out_put_tmp_file;
1729 }
1730
1731 if (xfs_is_shutdown(ip->i_mount)) {
1732 error = -EIO;
1733 goto out_put_tmp_file;
1734 }
1735
1736 error = xfs_swap_extents(ip, tip, sxp);
1737
1738 out_put_tmp_file:
1739 fdput(tmp);
1740 out_put_file:
1741 fdput(f);
1742 out:
1743 return error;
1744 }
1745
1746 static int
xfs_ioc_getlabel(struct xfs_mount * mp,char __user * user_label)1747 xfs_ioc_getlabel(
1748 struct xfs_mount *mp,
1749 char __user *user_label)
1750 {
1751 struct xfs_sb *sbp = &mp->m_sb;
1752 char label[XFSLABEL_MAX + 1];
1753
1754 /* Paranoia */
1755 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1756
1757 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1758 memset(label, 0, sizeof(label));
1759 spin_lock(&mp->m_sb_lock);
1760 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1761 spin_unlock(&mp->m_sb_lock);
1762
1763 if (copy_to_user(user_label, label, sizeof(label)))
1764 return -EFAULT;
1765 return 0;
1766 }
1767
1768 static int
xfs_ioc_setlabel(struct file * filp,struct xfs_mount * mp,char __user * newlabel)1769 xfs_ioc_setlabel(
1770 struct file *filp,
1771 struct xfs_mount *mp,
1772 char __user *newlabel)
1773 {
1774 struct xfs_sb *sbp = &mp->m_sb;
1775 char label[XFSLABEL_MAX + 1];
1776 size_t len;
1777 int error;
1778
1779 if (!capable(CAP_SYS_ADMIN))
1780 return -EPERM;
1781 /*
1782 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1783 * smaller, at 12 bytes. We copy one more to be sure we find the
1784 * (required) NULL character to test the incoming label length.
1785 * NB: The on disk label doesn't need to be null terminated.
1786 */
1787 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1788 return -EFAULT;
1789 len = strnlen(label, XFSLABEL_MAX + 1);
1790 if (len > sizeof(sbp->sb_fname))
1791 return -EINVAL;
1792
1793 error = mnt_want_write_file(filp);
1794 if (error)
1795 return error;
1796
1797 spin_lock(&mp->m_sb_lock);
1798 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1799 memcpy(sbp->sb_fname, label, len);
1800 spin_unlock(&mp->m_sb_lock);
1801
1802 /*
1803 * Now we do several things to satisfy userspace.
1804 * In addition to normal logging of the primary superblock, we also
1805 * immediately write these changes to sector zero for the primary, then
1806 * update all backup supers (as xfs_db does for a label change), then
1807 * invalidate the block device page cache. This is so that any prior
1808 * buffered reads from userspace (i.e. from blkid) are invalidated,
1809 * and userspace will see the newly-written label.
1810 */
1811 error = xfs_sync_sb_buf(mp);
1812 if (error)
1813 goto out;
1814 /*
1815 * growfs also updates backup supers so lock against that.
1816 */
1817 mutex_lock(&mp->m_growlock);
1818 error = xfs_update_secondary_sbs(mp);
1819 mutex_unlock(&mp->m_growlock);
1820
1821 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1822
1823 out:
1824 mnt_drop_write_file(filp);
1825 return error;
1826 }
1827
1828 static inline int
xfs_fs_eofblocks_from_user(struct xfs_fs_eofblocks * src,struct xfs_icwalk * dst)1829 xfs_fs_eofblocks_from_user(
1830 struct xfs_fs_eofblocks *src,
1831 struct xfs_icwalk *dst)
1832 {
1833 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1834 return -EINVAL;
1835
1836 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1837 return -EINVAL;
1838
1839 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1840 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1841 return -EINVAL;
1842
1843 dst->icw_flags = 0;
1844 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1845 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1846 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1847 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1848 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1849 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1850 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1851 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1852 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1853 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1854
1855 dst->icw_prid = src->eof_prid;
1856 dst->icw_min_file_size = src->eof_min_file_size;
1857
1858 dst->icw_uid = INVALID_UID;
1859 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1860 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1861 if (!uid_valid(dst->icw_uid))
1862 return -EINVAL;
1863 }
1864
1865 dst->icw_gid = INVALID_GID;
1866 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1867 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1868 if (!gid_valid(dst->icw_gid))
1869 return -EINVAL;
1870 }
1871 return 0;
1872 }
1873
1874 /*
1875 * These long-unused ioctls were removed from the official ioctl API in 5.17,
1876 * but retain these definitions so that we can log warnings about them.
1877 */
1878 #define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
1879 #define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
1880 #define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
1881 #define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
1882
1883 /*
1884 * Note: some of the ioctl's return positive numbers as a
1885 * byte count indicating success, such as readlink_by_handle.
1886 * So we don't "sign flip" like most other routines. This means
1887 * true errors need to be returned as a negative value.
1888 */
1889 long
xfs_file_ioctl(struct file * filp,unsigned int cmd,unsigned long p)1890 xfs_file_ioctl(
1891 struct file *filp,
1892 unsigned int cmd,
1893 unsigned long p)
1894 {
1895 struct inode *inode = file_inode(filp);
1896 struct xfs_inode *ip = XFS_I(inode);
1897 struct xfs_mount *mp = ip->i_mount;
1898 void __user *arg = (void __user *)p;
1899 int error;
1900
1901 trace_xfs_file_ioctl(ip);
1902
1903 switch (cmd) {
1904 case FITRIM:
1905 return xfs_ioc_trim(mp, arg);
1906 case FS_IOC_GETFSLABEL:
1907 return xfs_ioc_getlabel(mp, arg);
1908 case FS_IOC_SETFSLABEL:
1909 return xfs_ioc_setlabel(filp, mp, arg);
1910 case XFS_IOC_ALLOCSP:
1911 case XFS_IOC_FREESP:
1912 case XFS_IOC_ALLOCSP64:
1913 case XFS_IOC_FREESP64:
1914 xfs_warn_once(mp,
1915 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
1916 current->comm);
1917 return -ENOTTY;
1918 case XFS_IOC_DIOINFO: {
1919 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1920 struct dioattr da;
1921
1922 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1923 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1924
1925 if (copy_to_user(arg, &da, sizeof(da)))
1926 return -EFAULT;
1927 return 0;
1928 }
1929
1930 case XFS_IOC_FSBULKSTAT_SINGLE:
1931 case XFS_IOC_FSBULKSTAT:
1932 case XFS_IOC_FSINUMBERS:
1933 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1934
1935 case XFS_IOC_BULKSTAT:
1936 return xfs_ioc_bulkstat(filp, cmd, arg);
1937 case XFS_IOC_INUMBERS:
1938 return xfs_ioc_inumbers(mp, cmd, arg);
1939
1940 case XFS_IOC_FSGEOMETRY_V1:
1941 return xfs_ioc_fsgeometry(mp, arg, 3);
1942 case XFS_IOC_FSGEOMETRY_V4:
1943 return xfs_ioc_fsgeometry(mp, arg, 4);
1944 case XFS_IOC_FSGEOMETRY:
1945 return xfs_ioc_fsgeometry(mp, arg, 5);
1946
1947 case XFS_IOC_AG_GEOMETRY:
1948 return xfs_ioc_ag_geometry(mp, arg);
1949
1950 case XFS_IOC_GETVERSION:
1951 return put_user(inode->i_generation, (int __user *)arg);
1952
1953 case XFS_IOC_FSGETXATTRA:
1954 return xfs_ioc_fsgetxattra(ip, arg);
1955
1956 case XFS_IOC_GETBMAP:
1957 case XFS_IOC_GETBMAPA:
1958 case XFS_IOC_GETBMAPX:
1959 return xfs_ioc_getbmap(filp, cmd, arg);
1960
1961 case FS_IOC_GETFSMAP:
1962 return xfs_ioc_getfsmap(ip, arg);
1963
1964 case XFS_IOC_SCRUB_METADATA:
1965 return xfs_ioc_scrub_metadata(filp, arg);
1966
1967 case XFS_IOC_FD_TO_HANDLE:
1968 case XFS_IOC_PATH_TO_HANDLE:
1969 case XFS_IOC_PATH_TO_FSHANDLE: {
1970 xfs_fsop_handlereq_t hreq;
1971
1972 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1973 return -EFAULT;
1974 return xfs_find_handle(cmd, &hreq);
1975 }
1976 case XFS_IOC_OPEN_BY_HANDLE: {
1977 xfs_fsop_handlereq_t hreq;
1978
1979 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1980 return -EFAULT;
1981 return xfs_open_by_handle(filp, &hreq);
1982 }
1983
1984 case XFS_IOC_READLINK_BY_HANDLE: {
1985 xfs_fsop_handlereq_t hreq;
1986
1987 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1988 return -EFAULT;
1989 return xfs_readlink_by_handle(filp, &hreq);
1990 }
1991 case XFS_IOC_ATTRLIST_BY_HANDLE:
1992 return xfs_attrlist_by_handle(filp, arg);
1993
1994 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1995 return xfs_attrmulti_by_handle(filp, arg);
1996
1997 case XFS_IOC_SWAPEXT: {
1998 struct xfs_swapext sxp;
1999
2000 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2001 return -EFAULT;
2002 error = mnt_want_write_file(filp);
2003 if (error)
2004 return error;
2005 error = xfs_ioc_swapext(&sxp);
2006 mnt_drop_write_file(filp);
2007 return error;
2008 }
2009
2010 case XFS_IOC_FSCOUNTS: {
2011 xfs_fsop_counts_t out;
2012
2013 xfs_fs_counts(mp, &out);
2014
2015 if (copy_to_user(arg, &out, sizeof(out)))
2016 return -EFAULT;
2017 return 0;
2018 }
2019
2020 case XFS_IOC_SET_RESBLKS: {
2021 xfs_fsop_resblks_t inout;
2022 uint64_t in;
2023
2024 if (!capable(CAP_SYS_ADMIN))
2025 return -EPERM;
2026
2027 if (xfs_is_readonly(mp))
2028 return -EROFS;
2029
2030 if (copy_from_user(&inout, arg, sizeof(inout)))
2031 return -EFAULT;
2032
2033 error = mnt_want_write_file(filp);
2034 if (error)
2035 return error;
2036
2037 /* input parameter is passed in resblks field of structure */
2038 in = inout.resblks;
2039 error = xfs_reserve_blocks(mp, &in, &inout);
2040 mnt_drop_write_file(filp);
2041 if (error)
2042 return error;
2043
2044 if (copy_to_user(arg, &inout, sizeof(inout)))
2045 return -EFAULT;
2046 return 0;
2047 }
2048
2049 case XFS_IOC_GET_RESBLKS: {
2050 xfs_fsop_resblks_t out;
2051
2052 if (!capable(CAP_SYS_ADMIN))
2053 return -EPERM;
2054
2055 error = xfs_reserve_blocks(mp, NULL, &out);
2056 if (error)
2057 return error;
2058
2059 if (copy_to_user(arg, &out, sizeof(out)))
2060 return -EFAULT;
2061
2062 return 0;
2063 }
2064
2065 case XFS_IOC_FSGROWFSDATA: {
2066 struct xfs_growfs_data in;
2067
2068 if (copy_from_user(&in, arg, sizeof(in)))
2069 return -EFAULT;
2070
2071 error = mnt_want_write_file(filp);
2072 if (error)
2073 return error;
2074 error = xfs_growfs_data(mp, &in);
2075 mnt_drop_write_file(filp);
2076 return error;
2077 }
2078
2079 case XFS_IOC_FSGROWFSLOG: {
2080 struct xfs_growfs_log in;
2081
2082 if (copy_from_user(&in, arg, sizeof(in)))
2083 return -EFAULT;
2084
2085 error = mnt_want_write_file(filp);
2086 if (error)
2087 return error;
2088 error = xfs_growfs_log(mp, &in);
2089 mnt_drop_write_file(filp);
2090 return error;
2091 }
2092
2093 case XFS_IOC_FSGROWFSRT: {
2094 xfs_growfs_rt_t in;
2095
2096 if (copy_from_user(&in, arg, sizeof(in)))
2097 return -EFAULT;
2098
2099 error = mnt_want_write_file(filp);
2100 if (error)
2101 return error;
2102 error = xfs_growfs_rt(mp, &in);
2103 mnt_drop_write_file(filp);
2104 return error;
2105 }
2106
2107 case XFS_IOC_GOINGDOWN: {
2108 uint32_t in;
2109
2110 if (!capable(CAP_SYS_ADMIN))
2111 return -EPERM;
2112
2113 if (get_user(in, (uint32_t __user *)arg))
2114 return -EFAULT;
2115
2116 return xfs_fs_goingdown(mp, in);
2117 }
2118
2119 case XFS_IOC_ERROR_INJECTION: {
2120 xfs_error_injection_t in;
2121
2122 if (!capable(CAP_SYS_ADMIN))
2123 return -EPERM;
2124
2125 if (copy_from_user(&in, arg, sizeof(in)))
2126 return -EFAULT;
2127
2128 return xfs_errortag_add(mp, in.errtag);
2129 }
2130
2131 case XFS_IOC_ERROR_CLEARALL:
2132 if (!capable(CAP_SYS_ADMIN))
2133 return -EPERM;
2134
2135 return xfs_errortag_clearall(mp);
2136
2137 case XFS_IOC_FREE_EOFBLOCKS: {
2138 struct xfs_fs_eofblocks eofb;
2139 struct xfs_icwalk icw;
2140
2141 if (!capable(CAP_SYS_ADMIN))
2142 return -EPERM;
2143
2144 if (xfs_is_readonly(mp))
2145 return -EROFS;
2146
2147 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2148 return -EFAULT;
2149
2150 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
2151 if (error)
2152 return error;
2153
2154 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
2155
2156 sb_start_write(mp->m_super);
2157 error = xfs_blockgc_free_space(mp, &icw);
2158 sb_end_write(mp->m_super);
2159 return error;
2160 }
2161
2162 default:
2163 return -ENOTTY;
2164 }
2165 }
2166