1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #include "xfs.h"
7 #include "xfs_fs.h"
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_mount.h"
13 #include "xfs_inode.h"
14 #include "xfs_rtalloc.h"
15 #include "xfs_iwalk.h"
16 #include "xfs_itable.h"
17 #include "xfs_error.h"
18 #include "xfs_attr.h"
19 #include "xfs_bmap.h"
20 #include "xfs_bmap_util.h"
21 #include "xfs_fsops.h"
22 #include "xfs_discard.h"
23 #include "xfs_quota.h"
24 #include "xfs_export.h"
25 #include "xfs_trace.h"
26 #include "xfs_icache.h"
27 #include "xfs_trans.h"
28 #include "xfs_acl.h"
29 #include "xfs_btree.h"
30 #include <linux/fsmap.h>
31 #include "xfs_fsmap.h"
32 #include "scrub/xfs_scrub.h"
33 #include "xfs_sb.h"
34 #include "xfs_ag.h"
35 #include "xfs_health.h"
36 #include "xfs_reflink.h"
37 #include "xfs_ioctl.h"
38 #include "xfs_da_format.h"
39 #include "xfs_da_btree.h"
40
41 #include <linux/mount.h>
42 #include <linux/namei.h>
43 #include <linux/fileattr.h>
44
45 /*
46 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
47 * a file or fs handle.
48 *
49 * XFS_IOC_PATH_TO_FSHANDLE
50 * returns fs handle for a mount point or path within that mount point
51 * XFS_IOC_FD_TO_HANDLE
52 * returns full handle for a FD opened in user space
53 * XFS_IOC_PATH_TO_HANDLE
54 * returns full handle for a path
55 */
56 int
xfs_find_handle(unsigned int cmd,xfs_fsop_handlereq_t * hreq)57 xfs_find_handle(
58 unsigned int cmd,
59 xfs_fsop_handlereq_t *hreq)
60 {
61 int hsize;
62 xfs_handle_t handle;
63 struct inode *inode;
64 struct fd f = {NULL};
65 struct path path;
66 int error;
67 struct xfs_inode *ip;
68
69 if (cmd == XFS_IOC_FD_TO_HANDLE) {
70 f = fdget(hreq->fd);
71 if (!f.file)
72 return -EBADF;
73 inode = file_inode(f.file);
74 } else {
75 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
76 if (error)
77 return error;
78 inode = d_inode(path.dentry);
79 }
80 ip = XFS_I(inode);
81
82 /*
83 * We can only generate handles for inodes residing on a XFS filesystem,
84 * and only for regular files, directories or symbolic links.
85 */
86 error = -EINVAL;
87 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
88 goto out_put;
89
90 error = -EBADF;
91 if (!S_ISREG(inode->i_mode) &&
92 !S_ISDIR(inode->i_mode) &&
93 !S_ISLNK(inode->i_mode))
94 goto out_put;
95
96
97 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
98
99 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
100 /*
101 * This handle only contains an fsid, zero the rest.
102 */
103 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
104 hsize = sizeof(xfs_fsid_t);
105 } else {
106 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
107 sizeof(handle.ha_fid.fid_len);
108 handle.ha_fid.fid_pad = 0;
109 handle.ha_fid.fid_gen = inode->i_generation;
110 handle.ha_fid.fid_ino = ip->i_ino;
111 hsize = sizeof(xfs_handle_t);
112 }
113
114 error = -EFAULT;
115 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
116 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
117 goto out_put;
118
119 error = 0;
120
121 out_put:
122 if (cmd == XFS_IOC_FD_TO_HANDLE)
123 fdput(f);
124 else
125 path_put(&path);
126 return error;
127 }
128
129 /*
130 * No need to do permission checks on the various pathname components
131 * as the handle operations are privileged.
132 */
133 STATIC int
xfs_handle_acceptable(void * context,struct dentry * dentry)134 xfs_handle_acceptable(
135 void *context,
136 struct dentry *dentry)
137 {
138 return 1;
139 }
140
141 /*
142 * Convert userspace handle data into a dentry.
143 */
144 struct dentry *
xfs_handle_to_dentry(struct file * parfilp,void __user * uhandle,u32 hlen)145 xfs_handle_to_dentry(
146 struct file *parfilp,
147 void __user *uhandle,
148 u32 hlen)
149 {
150 xfs_handle_t handle;
151 struct xfs_fid64 fid;
152
153 /*
154 * Only allow handle opens under a directory.
155 */
156 if (!S_ISDIR(file_inode(parfilp)->i_mode))
157 return ERR_PTR(-ENOTDIR);
158
159 if (hlen != sizeof(xfs_handle_t))
160 return ERR_PTR(-EINVAL);
161 if (copy_from_user(&handle, uhandle, hlen))
162 return ERR_PTR(-EFAULT);
163 if (handle.ha_fid.fid_len !=
164 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
165 return ERR_PTR(-EINVAL);
166
167 memset(&fid, 0, sizeof(struct fid));
168 fid.ino = handle.ha_fid.fid_ino;
169 fid.gen = handle.ha_fid.fid_gen;
170
171 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
172 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
173 xfs_handle_acceptable, NULL);
174 }
175
176 STATIC struct dentry *
xfs_handlereq_to_dentry(struct file * parfilp,xfs_fsop_handlereq_t * hreq)177 xfs_handlereq_to_dentry(
178 struct file *parfilp,
179 xfs_fsop_handlereq_t *hreq)
180 {
181 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
182 }
183
184 int
xfs_open_by_handle(struct file * parfilp,xfs_fsop_handlereq_t * hreq)185 xfs_open_by_handle(
186 struct file *parfilp,
187 xfs_fsop_handlereq_t *hreq)
188 {
189 const struct cred *cred = current_cred();
190 int error;
191 int fd;
192 int permflag;
193 struct file *filp;
194 struct inode *inode;
195 struct dentry *dentry;
196 fmode_t fmode;
197 struct path path;
198
199 if (!capable(CAP_SYS_ADMIN))
200 return -EPERM;
201
202 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
203 if (IS_ERR(dentry))
204 return PTR_ERR(dentry);
205 inode = d_inode(dentry);
206
207 /* Restrict xfs_open_by_handle to directories & regular files. */
208 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
209 error = -EPERM;
210 goto out_dput;
211 }
212
213 #if BITS_PER_LONG != 32
214 hreq->oflags |= O_LARGEFILE;
215 #endif
216
217 permflag = hreq->oflags;
218 fmode = OPEN_FMODE(permflag);
219 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
220 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
221 error = -EPERM;
222 goto out_dput;
223 }
224
225 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
226 error = -EPERM;
227 goto out_dput;
228 }
229
230 /* Can't write directories. */
231 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
232 error = -EISDIR;
233 goto out_dput;
234 }
235
236 fd = get_unused_fd_flags(0);
237 if (fd < 0) {
238 error = fd;
239 goto out_dput;
240 }
241
242 path.mnt = parfilp->f_path.mnt;
243 path.dentry = dentry;
244 filp = dentry_open(&path, hreq->oflags, cred);
245 dput(dentry);
246 if (IS_ERR(filp)) {
247 put_unused_fd(fd);
248 return PTR_ERR(filp);
249 }
250
251 if (S_ISREG(inode->i_mode)) {
252 filp->f_flags |= O_NOATIME;
253 filp->f_mode |= FMODE_NOCMTIME;
254 }
255
256 fd_install(fd, filp);
257 return fd;
258
259 out_dput:
260 dput(dentry);
261 return error;
262 }
263
264 int
xfs_readlink_by_handle(struct file * parfilp,xfs_fsop_handlereq_t * hreq)265 xfs_readlink_by_handle(
266 struct file *parfilp,
267 xfs_fsop_handlereq_t *hreq)
268 {
269 struct dentry *dentry;
270 __u32 olen;
271 int error;
272
273 if (!capable(CAP_SYS_ADMIN))
274 return -EPERM;
275
276 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
277 if (IS_ERR(dentry))
278 return PTR_ERR(dentry);
279
280 /* Restrict this handle operation to symlinks only. */
281 if (!d_is_symlink(dentry)) {
282 error = -EINVAL;
283 goto out_dput;
284 }
285
286 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
287 error = -EFAULT;
288 goto out_dput;
289 }
290
291 error = vfs_readlink(dentry, hreq->ohandle, olen);
292
293 out_dput:
294 dput(dentry);
295 return error;
296 }
297
298 /*
299 * Format an attribute and copy it out to the user's buffer.
300 * Take care to check values and protect against them changing later,
301 * we may be reading them directly out of a user buffer.
302 */
303 static void
xfs_ioc_attr_put_listent(struct xfs_attr_list_context * context,int flags,unsigned char * name,int namelen,int valuelen)304 xfs_ioc_attr_put_listent(
305 struct xfs_attr_list_context *context,
306 int flags,
307 unsigned char *name,
308 int namelen,
309 int valuelen)
310 {
311 struct xfs_attrlist *alist = context->buffer;
312 struct xfs_attrlist_ent *aep;
313 int arraytop;
314
315 ASSERT(!context->seen_enough);
316 ASSERT(context->count >= 0);
317 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
318 ASSERT(context->firstu >= sizeof(*alist));
319 ASSERT(context->firstu <= context->bufsize);
320
321 /*
322 * Only list entries in the right namespace.
323 */
324 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
325 return;
326
327 arraytop = sizeof(*alist) +
328 context->count * sizeof(alist->al_offset[0]);
329
330 /* decrement by the actual bytes used by the attr */
331 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
332 namelen + 1, sizeof(uint32_t));
333 if (context->firstu < arraytop) {
334 trace_xfs_attr_list_full(context);
335 alist->al_more = 1;
336 context->seen_enough = 1;
337 return;
338 }
339
340 aep = context->buffer + context->firstu;
341 aep->a_valuelen = valuelen;
342 memcpy(aep->a_name, name, namelen);
343 aep->a_name[namelen] = 0;
344 alist->al_offset[context->count++] = context->firstu;
345 alist->al_count = context->count;
346 trace_xfs_attr_list_add(context);
347 }
348
349 static unsigned int
xfs_attr_filter(u32 ioc_flags)350 xfs_attr_filter(
351 u32 ioc_flags)
352 {
353 if (ioc_flags & XFS_IOC_ATTR_ROOT)
354 return XFS_ATTR_ROOT;
355 if (ioc_flags & XFS_IOC_ATTR_SECURE)
356 return XFS_ATTR_SECURE;
357 return 0;
358 }
359
360 static unsigned int
xfs_attr_flags(u32 ioc_flags)361 xfs_attr_flags(
362 u32 ioc_flags)
363 {
364 if (ioc_flags & XFS_IOC_ATTR_CREATE)
365 return XATTR_CREATE;
366 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
367 return XATTR_REPLACE;
368 return 0;
369 }
370
371 int
xfs_ioc_attr_list(struct xfs_inode * dp,void __user * ubuf,int bufsize,int flags,struct xfs_attrlist_cursor __user * ucursor)372 xfs_ioc_attr_list(
373 struct xfs_inode *dp,
374 void __user *ubuf,
375 int bufsize,
376 int flags,
377 struct xfs_attrlist_cursor __user *ucursor)
378 {
379 struct xfs_attr_list_context context = { };
380 struct xfs_attrlist *alist;
381 void *buffer;
382 int error;
383
384 if (bufsize < sizeof(struct xfs_attrlist) ||
385 bufsize > XFS_XATTR_LIST_MAX)
386 return -EINVAL;
387
388 /*
389 * Reject flags, only allow namespaces.
390 */
391 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
392 return -EINVAL;
393 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
394 return -EINVAL;
395
396 /*
397 * Validate the cursor.
398 */
399 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
400 return -EFAULT;
401 if (context.cursor.pad1 || context.cursor.pad2)
402 return -EINVAL;
403 if (!context.cursor.initted &&
404 (context.cursor.hashval || context.cursor.blkno ||
405 context.cursor.offset))
406 return -EINVAL;
407
408 buffer = kvzalloc(bufsize, GFP_KERNEL);
409 if (!buffer)
410 return -ENOMEM;
411
412 /*
413 * Initialize the output buffer.
414 */
415 context.dp = dp;
416 context.resynch = 1;
417 context.attr_filter = xfs_attr_filter(flags);
418 context.buffer = buffer;
419 context.bufsize = round_down(bufsize, sizeof(uint32_t));
420 context.firstu = context.bufsize;
421 context.put_listent = xfs_ioc_attr_put_listent;
422
423 alist = context.buffer;
424 alist->al_count = 0;
425 alist->al_more = 0;
426 alist->al_offset[0] = context.bufsize;
427
428 error = xfs_attr_list(&context);
429 if (error)
430 goto out_free;
431
432 if (copy_to_user(ubuf, buffer, bufsize) ||
433 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
434 error = -EFAULT;
435 out_free:
436 kmem_free(buffer);
437 return error;
438 }
439
440 STATIC int
xfs_attrlist_by_handle(struct file * parfilp,struct xfs_fsop_attrlist_handlereq __user * p)441 xfs_attrlist_by_handle(
442 struct file *parfilp,
443 struct xfs_fsop_attrlist_handlereq __user *p)
444 {
445 struct xfs_fsop_attrlist_handlereq al_hreq;
446 struct dentry *dentry;
447 int error = -ENOMEM;
448
449 if (!capable(CAP_SYS_ADMIN))
450 return -EPERM;
451 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
452 return -EFAULT;
453
454 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
455 if (IS_ERR(dentry))
456 return PTR_ERR(dentry);
457
458 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
459 al_hreq.buflen, al_hreq.flags, &p->pos);
460 dput(dentry);
461 return error;
462 }
463
464 static int
xfs_attrmulti_attr_get(struct inode * inode,unsigned char * name,unsigned char __user * ubuf,uint32_t * len,uint32_t flags)465 xfs_attrmulti_attr_get(
466 struct inode *inode,
467 unsigned char *name,
468 unsigned char __user *ubuf,
469 uint32_t *len,
470 uint32_t flags)
471 {
472 struct xfs_da_args args = {
473 .dp = XFS_I(inode),
474 .attr_filter = xfs_attr_filter(flags),
475 .attr_flags = xfs_attr_flags(flags),
476 .name = name,
477 .namelen = strlen(name),
478 .valuelen = *len,
479 };
480 int error;
481
482 if (*len > XFS_XATTR_SIZE_MAX)
483 return -EINVAL;
484
485 error = xfs_attr_get(&args);
486 if (error)
487 goto out_kfree;
488
489 *len = args.valuelen;
490 if (copy_to_user(ubuf, args.value, args.valuelen))
491 error = -EFAULT;
492
493 out_kfree:
494 kmem_free(args.value);
495 return error;
496 }
497
498 static int
xfs_attrmulti_attr_set(struct inode * inode,unsigned char * name,const unsigned char __user * ubuf,uint32_t len,uint32_t flags)499 xfs_attrmulti_attr_set(
500 struct inode *inode,
501 unsigned char *name,
502 const unsigned char __user *ubuf,
503 uint32_t len,
504 uint32_t flags)
505 {
506 struct xfs_da_args args = {
507 .dp = XFS_I(inode),
508 .attr_filter = xfs_attr_filter(flags),
509 .attr_flags = xfs_attr_flags(flags),
510 .name = name,
511 .namelen = strlen(name),
512 };
513 int error;
514
515 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
516 return -EPERM;
517
518 if (ubuf) {
519 if (len > XFS_XATTR_SIZE_MAX)
520 return -EINVAL;
521 args.value = memdup_user(ubuf, len);
522 if (IS_ERR(args.value))
523 return PTR_ERR(args.value);
524 args.valuelen = len;
525 }
526
527 error = xfs_attr_set(&args);
528 if (!error && (flags & XFS_IOC_ATTR_ROOT))
529 xfs_forget_acl(inode, name);
530 kfree(args.value);
531 return error;
532 }
533
534 int
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)535 xfs_ioc_attrmulti_one(
536 struct file *parfilp,
537 struct inode *inode,
538 uint32_t opcode,
539 void __user *uname,
540 void __user *value,
541 uint32_t *len,
542 uint32_t flags)
543 {
544 unsigned char *name;
545 int error;
546
547 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
548 return -EINVAL;
549
550 name = strndup_user(uname, MAXNAMELEN);
551 if (IS_ERR(name))
552 return PTR_ERR(name);
553
554 switch (opcode) {
555 case ATTR_OP_GET:
556 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
557 break;
558 case ATTR_OP_REMOVE:
559 value = NULL;
560 *len = 0;
561 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
578 STATIC int
xfs_attrmulti_by_handle(struct file * parfilp,void __user * arg)579 xfs_attrmulti_by_handle(
580 struct file *parfilp,
581 void __user *arg)
582 {
583 int error;
584 xfs_attr_multiop_t *ops;
585 xfs_fsop_attrmulti_handlereq_t am_hreq;
586 struct dentry *dentry;
587 unsigned int i, size;
588
589 if (!capable(CAP_SYS_ADMIN))
590 return -EPERM;
591 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
592 return -EFAULT;
593
594 /* overflow check */
595 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
596 return -E2BIG;
597
598 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
599 if (IS_ERR(dentry))
600 return PTR_ERR(dentry);
601
602 error = -E2BIG;
603 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
604 if (!size || size > 16 * PAGE_SIZE)
605 goto out_dput;
606
607 ops = memdup_user(am_hreq.ops, size);
608 if (IS_ERR(ops)) {
609 error = PTR_ERR(ops);
610 goto out_dput;
611 }
612
613 error = 0;
614 for (i = 0; i < am_hreq.opcount; i++) {
615 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
616 d_inode(dentry), ops[i].am_opcode,
617 ops[i].am_attrname, ops[i].am_attrvalue,
618 &ops[i].am_length, ops[i].am_flags);
619 }
620
621 if (copy_to_user(am_hreq.ops, ops, size))
622 error = -EFAULT;
623
624 kfree(ops);
625 out_dput:
626 dput(dentry);
627 return error;
628 }
629
630 int
xfs_ioc_space(struct file * filp,xfs_flock64_t * bf)631 xfs_ioc_space(
632 struct file *filp,
633 xfs_flock64_t *bf)
634 {
635 struct inode *inode = file_inode(filp);
636 struct xfs_inode *ip = XFS_I(inode);
637 struct iattr iattr;
638 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR;
639 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
640 int error;
641
642 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
643 return -EPERM;
644
645 if (!(filp->f_mode & FMODE_WRITE))
646 return -EBADF;
647
648 if (!S_ISREG(inode->i_mode))
649 return -EINVAL;
650
651 if (xfs_is_always_cow_inode(ip))
652 return -EOPNOTSUPP;
653
654 if (filp->f_flags & O_DSYNC)
655 flags |= XFS_PREALLOC_SYNC;
656 if (filp->f_mode & FMODE_NOCMTIME)
657 flags |= XFS_PREALLOC_INVISIBLE;
658
659 error = mnt_want_write_file(filp);
660 if (error)
661 return error;
662
663 xfs_ilock(ip, iolock);
664 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
665 if (error)
666 goto out_unlock;
667 inode_dio_wait(inode);
668
669 switch (bf->l_whence) {
670 case 0: /*SEEK_SET*/
671 break;
672 case 1: /*SEEK_CUR*/
673 bf->l_start += filp->f_pos;
674 break;
675 case 2: /*SEEK_END*/
676 bf->l_start += XFS_ISIZE(ip);
677 break;
678 default:
679 error = -EINVAL;
680 goto out_unlock;
681 }
682
683 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) {
684 error = -EINVAL;
685 goto out_unlock;
686 }
687
688 if (bf->l_start > XFS_ISIZE(ip)) {
689 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
690 bf->l_start - XFS_ISIZE(ip), 0);
691 if (error)
692 goto out_unlock;
693 }
694
695 iattr.ia_valid = ATTR_SIZE;
696 iattr.ia_size = bf->l_start;
697 error = xfs_vn_setattr_size(file_mnt_user_ns(filp), file_dentry(filp),
698 &iattr);
699 if (error)
700 goto out_unlock;
701
702 error = xfs_update_prealloc_flags(ip, flags);
703
704 out_unlock:
705 xfs_iunlock(ip, iolock);
706 mnt_drop_write_file(filp);
707 return error;
708 }
709
710 /* Return 0 on success or positive error */
711 int
xfs_fsbulkstat_one_fmt(struct xfs_ibulk * breq,const struct xfs_bulkstat * bstat)712 xfs_fsbulkstat_one_fmt(
713 struct xfs_ibulk *breq,
714 const struct xfs_bulkstat *bstat)
715 {
716 struct xfs_bstat bs1;
717
718 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
719 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
720 return -EFAULT;
721 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
722 }
723
724 int
xfs_fsinumbers_fmt(struct xfs_ibulk * breq,const struct xfs_inumbers * igrp)725 xfs_fsinumbers_fmt(
726 struct xfs_ibulk *breq,
727 const struct xfs_inumbers *igrp)
728 {
729 struct xfs_inogrp ig1;
730
731 xfs_inumbers_to_inogrp(&ig1, igrp);
732 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
733 return -EFAULT;
734 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
735 }
736
737 STATIC int
xfs_ioc_fsbulkstat(struct file * file,unsigned int cmd,void __user * arg)738 xfs_ioc_fsbulkstat(
739 struct file *file,
740 unsigned int cmd,
741 void __user *arg)
742 {
743 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
744 struct xfs_fsop_bulkreq bulkreq;
745 struct xfs_ibulk breq = {
746 .mp = mp,
747 .mnt_userns = file_mnt_user_ns(file),
748 .ocount = 0,
749 };
750 xfs_ino_t lastino;
751 int error;
752
753 /* done = 1 if there are more stats to get and if bulkstat */
754 /* should be called again (unused here, but used in dmapi) */
755
756 if (!capable(CAP_SYS_ADMIN))
757 return -EPERM;
758
759 if (xfs_is_shutdown(mp))
760 return -EIO;
761
762 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
763 return -EFAULT;
764
765 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
766 return -EFAULT;
767
768 if (bulkreq.icount <= 0)
769 return -EINVAL;
770
771 if (bulkreq.ubuffer == NULL)
772 return -EINVAL;
773
774 breq.ubuffer = bulkreq.ubuffer;
775 breq.icount = bulkreq.icount;
776
777 /*
778 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
779 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
780 * that *lastip contains either zero or the number of the last inode to
781 * be examined by the previous call and return results starting with
782 * the next inode after that. The new bulk request back end functions
783 * take the inode to start with, so we have to compute the startino
784 * parameter from lastino to maintain correct function. lastino == 0
785 * is a special case because it has traditionally meant "first inode
786 * in filesystem".
787 */
788 if (cmd == XFS_IOC_FSINUMBERS) {
789 breq.startino = lastino ? lastino + 1 : 0;
790 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
791 lastino = breq.startino - 1;
792 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
793 breq.startino = lastino;
794 breq.icount = 1;
795 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
796 } else { /* XFS_IOC_FSBULKSTAT */
797 breq.startino = lastino ? lastino + 1 : 0;
798 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
799 lastino = breq.startino - 1;
800 }
801
802 if (error)
803 return error;
804
805 if (bulkreq.lastip != NULL &&
806 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
807 return -EFAULT;
808
809 if (bulkreq.ocount != NULL &&
810 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
811 return -EFAULT;
812
813 return 0;
814 }
815
816 /* Return 0 on success or positive error */
817 static int
xfs_bulkstat_fmt(struct xfs_ibulk * breq,const struct xfs_bulkstat * bstat)818 xfs_bulkstat_fmt(
819 struct xfs_ibulk *breq,
820 const struct xfs_bulkstat *bstat)
821 {
822 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
823 return -EFAULT;
824 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
825 }
826
827 /*
828 * Check the incoming bulk request @hdr from userspace and initialize the
829 * internal @breq bulk request appropriately. Returns 0 if the bulk request
830 * should proceed; -ECANCELED if there's nothing to do; or the usual
831 * negative error code.
832 */
833 static int
xfs_bulk_ireq_setup(struct xfs_mount * mp,struct xfs_bulk_ireq * hdr,struct xfs_ibulk * breq,void __user * ubuffer)834 xfs_bulk_ireq_setup(
835 struct xfs_mount *mp,
836 struct xfs_bulk_ireq *hdr,
837 struct xfs_ibulk *breq,
838 void __user *ubuffer)
839 {
840 if (hdr->icount == 0 ||
841 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
842 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
843 return -EINVAL;
844
845 breq->startino = hdr->ino;
846 breq->ubuffer = ubuffer;
847 breq->icount = hdr->icount;
848 breq->ocount = 0;
849 breq->flags = 0;
850
851 /*
852 * The @ino parameter is a special value, so we must look it up here.
853 * We're not allowed to have IREQ_AGNO, and we only return one inode
854 * worth of data.
855 */
856 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
857 if (hdr->flags & XFS_BULK_IREQ_AGNO)
858 return -EINVAL;
859
860 switch (hdr->ino) {
861 case XFS_BULK_IREQ_SPECIAL_ROOT:
862 hdr->ino = mp->m_sb.sb_rootino;
863 break;
864 default:
865 return -EINVAL;
866 }
867 breq->icount = 1;
868 }
869
870 /*
871 * The IREQ_AGNO flag means that we only want results from a given AG.
872 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
873 * beyond the specified AG then we return no results.
874 */
875 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
876 if (hdr->agno >= mp->m_sb.sb_agcount)
877 return -EINVAL;
878
879 if (breq->startino == 0)
880 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
881 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
882 return -EINVAL;
883
884 breq->flags |= XFS_IBULK_SAME_AG;
885
886 /* Asking for an inode past the end of the AG? We're done! */
887 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
888 return -ECANCELED;
889 } else if (hdr->agno)
890 return -EINVAL;
891
892 /* Asking for an inode past the end of the FS? We're done! */
893 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
894 return -ECANCELED;
895
896 return 0;
897 }
898
899 /*
900 * Update the userspace bulk request @hdr to reflect the end state of the
901 * internal bulk request @breq.
902 */
903 static void
xfs_bulk_ireq_teardown(struct xfs_bulk_ireq * hdr,struct xfs_ibulk * breq)904 xfs_bulk_ireq_teardown(
905 struct xfs_bulk_ireq *hdr,
906 struct xfs_ibulk *breq)
907 {
908 hdr->ino = breq->startino;
909 hdr->ocount = breq->ocount;
910 }
911
912 /* Handle the v5 bulkstat ioctl. */
913 STATIC int
xfs_ioc_bulkstat(struct file * file,unsigned int cmd,struct xfs_bulkstat_req __user * arg)914 xfs_ioc_bulkstat(
915 struct file *file,
916 unsigned int cmd,
917 struct xfs_bulkstat_req __user *arg)
918 {
919 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
920 struct xfs_bulk_ireq hdr;
921 struct xfs_ibulk breq = {
922 .mp = mp,
923 .mnt_userns = file_mnt_user_ns(file),
924 };
925 int error;
926
927 if (!capable(CAP_SYS_ADMIN))
928 return -EPERM;
929
930 if (xfs_is_shutdown(mp))
931 return -EIO;
932
933 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
934 return -EFAULT;
935
936 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
937 if (error == -ECANCELED)
938 goto out_teardown;
939 if (error < 0)
940 return error;
941
942 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
943 if (error)
944 return error;
945
946 out_teardown:
947 xfs_bulk_ireq_teardown(&hdr, &breq);
948 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
949 return -EFAULT;
950
951 return 0;
952 }
953
954 STATIC int
xfs_inumbers_fmt(struct xfs_ibulk * breq,const struct xfs_inumbers * igrp)955 xfs_inumbers_fmt(
956 struct xfs_ibulk *breq,
957 const struct xfs_inumbers *igrp)
958 {
959 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
960 return -EFAULT;
961 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
962 }
963
964 /* Handle the v5 inumbers ioctl. */
965 STATIC int
xfs_ioc_inumbers(struct xfs_mount * mp,unsigned int cmd,struct xfs_inumbers_req __user * arg)966 xfs_ioc_inumbers(
967 struct xfs_mount *mp,
968 unsigned int cmd,
969 struct xfs_inumbers_req __user *arg)
970 {
971 struct xfs_bulk_ireq hdr;
972 struct xfs_ibulk breq = {
973 .mp = mp,
974 };
975 int error;
976
977 if (!capable(CAP_SYS_ADMIN))
978 return -EPERM;
979
980 if (xfs_is_shutdown(mp))
981 return -EIO;
982
983 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
984 return -EFAULT;
985
986 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
987 if (error == -ECANCELED)
988 goto out_teardown;
989 if (error < 0)
990 return error;
991
992 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
993 if (error)
994 return error;
995
996 out_teardown:
997 xfs_bulk_ireq_teardown(&hdr, &breq);
998 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
999 return -EFAULT;
1000
1001 return 0;
1002 }
1003
1004 STATIC int
xfs_ioc_fsgeometry(struct xfs_mount * mp,void __user * arg,int struct_version)1005 xfs_ioc_fsgeometry(
1006 struct xfs_mount *mp,
1007 void __user *arg,
1008 int struct_version)
1009 {
1010 struct xfs_fsop_geom fsgeo;
1011 size_t len;
1012
1013 xfs_fs_geometry(mp, &fsgeo, struct_version);
1014
1015 if (struct_version <= 3)
1016 len = sizeof(struct xfs_fsop_geom_v1);
1017 else if (struct_version == 4)
1018 len = sizeof(struct xfs_fsop_geom_v4);
1019 else {
1020 xfs_fsop_geom_health(mp, &fsgeo);
1021 len = sizeof(fsgeo);
1022 }
1023
1024 if (copy_to_user(arg, &fsgeo, len))
1025 return -EFAULT;
1026 return 0;
1027 }
1028
1029 STATIC int
xfs_ioc_ag_geometry(struct xfs_mount * mp,void __user * arg)1030 xfs_ioc_ag_geometry(
1031 struct xfs_mount *mp,
1032 void __user *arg)
1033 {
1034 struct xfs_ag_geometry ageo;
1035 int error;
1036
1037 if (copy_from_user(&ageo, arg, sizeof(ageo)))
1038 return -EFAULT;
1039 if (ageo.ag_flags)
1040 return -EINVAL;
1041 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
1042 return -EINVAL;
1043
1044 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1045 if (error)
1046 return error;
1047
1048 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1049 return -EFAULT;
1050 return 0;
1051 }
1052
1053 /*
1054 * Linux extended inode flags interface.
1055 */
1056
1057 static void
xfs_fill_fsxattr(struct xfs_inode * ip,int whichfork,struct fileattr * fa)1058 xfs_fill_fsxattr(
1059 struct xfs_inode *ip,
1060 int whichfork,
1061 struct fileattr *fa)
1062 {
1063 struct xfs_mount *mp = ip->i_mount;
1064 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
1065
1066 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
1067
1068 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
1095 STATIC int
xfs_ioc_fsgetxattra(xfs_inode_t * ip,void __user * arg)1096 xfs_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
1109 int
xfs_fileattr_get(struct dentry * dentry,struct fileattr * fa)1110 xfs_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
1126 STATIC uint16_t
xfs_flags2diflags(struct xfs_inode * ip,unsigned int xflags)1127 xfs_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
1168 STATIC uint64_t
xfs_flags2diflags2(struct xfs_inode * ip,unsigned int xflags)1169 xfs_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
1185 static int
xfs_ioctl_setattr_xflags(struct xfs_trans * tp,struct xfs_inode * ip,struct fileattr * fa)1186 xfs_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_has_v3inodes(mp))
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
1229 static void
xfs_ioctl_setattr_prepare_dax(struct xfs_inode * ip,struct fileattr * fa)1230 xfs_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 (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
1241 return;
1242
1243 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
1244 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
1245 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
1246 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
1247 d_mark_dontcache(inode);
1248 }
1249
1250 /*
1251 * Set up the transaction structure for the setattr operation, checking that we
1252 * have permission to do so. On success, return a clean transaction and the
1253 * inode locked exclusively ready for further operation specific checks. On
1254 * failure, return an error without modifying or locking the inode.
1255 */
1256 static struct xfs_trans *
xfs_ioctl_setattr_get_trans(struct xfs_inode * ip,struct xfs_dquot * pdqp)1257 xfs_ioctl_setattr_get_trans(
1258 struct xfs_inode *ip,
1259 struct xfs_dquot *pdqp)
1260 {
1261 struct xfs_mount *mp = ip->i_mount;
1262 struct xfs_trans *tp;
1263 int error = -EROFS;
1264
1265 if (xfs_is_readonly(mp))
1266 goto out_error;
1267 error = -EIO;
1268 if (xfs_is_shutdown(mp))
1269 goto out_error;
1270
1271 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
1272 capable(CAP_FOWNER), &tp);
1273 if (error)
1274 goto out_error;
1275
1276 if (xfs_has_wsync(mp))
1277 xfs_trans_set_sync(tp);
1278
1279 return tp;
1280
1281 out_error:
1282 return ERR_PTR(error);
1283 }
1284
1285 /*
1286 * Validate a proposed extent size hint. For regular files, the hint can only
1287 * be changed if no extents are allocated.
1288 */
1289 static int
xfs_ioctl_setattr_check_extsize(struct xfs_inode * ip,struct fileattr * fa)1290 xfs_ioctl_setattr_check_extsize(
1291 struct xfs_inode *ip,
1292 struct fileattr *fa)
1293 {
1294 struct xfs_mount *mp = ip->i_mount;
1295 xfs_failaddr_t failaddr;
1296 uint16_t new_diflags;
1297
1298 if (!fa->fsx_valid)
1299 return 0;
1300
1301 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
1302 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
1303 return -EINVAL;
1304
1305 if (fa->fsx_extsize & mp->m_blockmask)
1306 return -EINVAL;
1307
1308 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1309
1310 /*
1311 * Inode verifiers do not check that the extent size hint is an integer
1312 * multiple of the rt extent size on a directory with both rtinherit
1313 * and extszinherit flags set. Don't let sysadmins misconfigure
1314 * directories.
1315 */
1316 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
1317 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
1318 unsigned int rtextsize_bytes;
1319
1320 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
1321 if (fa->fsx_extsize % rtextsize_bytes)
1322 return -EINVAL;
1323 }
1324
1325 failaddr = xfs_inode_validate_extsize(ip->i_mount,
1326 XFS_B_TO_FSB(mp, fa->fsx_extsize),
1327 VFS_I(ip)->i_mode, new_diflags);
1328 return failaddr != NULL ? -EINVAL : 0;
1329 }
1330
1331 static int
xfs_ioctl_setattr_check_cowextsize(struct xfs_inode * ip,struct fileattr * fa)1332 xfs_ioctl_setattr_check_cowextsize(
1333 struct xfs_inode *ip,
1334 struct fileattr *fa)
1335 {
1336 struct xfs_mount *mp = ip->i_mount;
1337 xfs_failaddr_t failaddr;
1338 uint64_t new_diflags2;
1339 uint16_t new_diflags;
1340
1341 if (!fa->fsx_valid)
1342 return 0;
1343
1344 if (fa->fsx_cowextsize & mp->m_blockmask)
1345 return -EINVAL;
1346
1347 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1348 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1349
1350 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
1351 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
1352 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
1353 return failaddr != NULL ? -EINVAL : 0;
1354 }
1355
1356 static int
xfs_ioctl_setattr_check_projid(struct xfs_inode * ip,struct fileattr * fa)1357 xfs_ioctl_setattr_check_projid(
1358 struct xfs_inode *ip,
1359 struct fileattr *fa)
1360 {
1361 if (!fa->fsx_valid)
1362 return 0;
1363
1364 /* Disallow 32bit project ids if 32bit IDs are not enabled. */
1365 if (fa->fsx_projid > (uint16_t)-1 &&
1366 !xfs_has_projid32(ip->i_mount))
1367 return -EINVAL;
1368 return 0;
1369 }
1370
1371 int
xfs_fileattr_set(struct user_namespace * mnt_userns,struct dentry * dentry,struct fileattr * fa)1372 xfs_fileattr_set(
1373 struct user_namespace *mnt_userns,
1374 struct dentry *dentry,
1375 struct fileattr *fa)
1376 {
1377 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1378 struct xfs_mount *mp = ip->i_mount;
1379 struct xfs_trans *tp;
1380 struct xfs_dquot *pdqp = NULL;
1381 struct xfs_dquot *olddquot = NULL;
1382 int error;
1383
1384 trace_xfs_ioctl_setattr(ip);
1385
1386 if (d_is_special(dentry))
1387 return -ENOTTY;
1388
1389 if (!fa->fsx_valid) {
1390 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1391 FS_NOATIME_FL | FS_NODUMP_FL |
1392 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1393 return -EOPNOTSUPP;
1394 }
1395
1396 error = xfs_ioctl_setattr_check_projid(ip, fa);
1397 if (error)
1398 return error;
1399
1400 /*
1401 * If disk quotas is on, we make sure that the dquots do exist on disk,
1402 * before we start any other transactions. Trying to do this later
1403 * is messy. We don't care to take a readlock to look at the ids
1404 * in inode here, because we can't hold it across the trans_reserve.
1405 * If the IDs do change before we take the ilock, we're covered
1406 * because the i_*dquot fields will get updated anyway.
1407 */
1408 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
1409 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
1410 VFS_I(ip)->i_gid, fa->fsx_projid,
1411 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
1412 if (error)
1413 return error;
1414 }
1415
1416 xfs_ioctl_setattr_prepare_dax(ip, fa);
1417
1418 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
1419 if (IS_ERR(tp)) {
1420 error = PTR_ERR(tp);
1421 goto error_free_dquots;
1422 }
1423
1424 error = xfs_ioctl_setattr_check_extsize(ip, fa);
1425 if (error)
1426 goto error_trans_cancel;
1427
1428 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1429 if (error)
1430 goto error_trans_cancel;
1431
1432 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1433 if (error)
1434 goto error_trans_cancel;
1435
1436 if (!fa->fsx_valid)
1437 goto skip_xattr;
1438 /*
1439 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1440 * overrides the following restrictions:
1441 *
1442 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1443 * successful return from chown()
1444 */
1445
1446 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1447 !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID))
1448 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1449
1450 /* Change the ownerships and register project quota modifications */
1451 if (ip->i_projid != fa->fsx_projid) {
1452 if (XFS_IS_PQUOTA_ON(mp)) {
1453 olddquot = xfs_qm_vop_chown(tp, ip,
1454 &ip->i_pdquot, pdqp);
1455 }
1456 ip->i_projid = fa->fsx_projid;
1457 }
1458
1459 /*
1460 * Only set the extent size hint if we've already determined that the
1461 * extent size hint should be set on the inode. If no extent size flags
1462 * are set on the inode then unconditionally clear the extent size hint.
1463 */
1464 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1465 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1466 else
1467 ip->i_extsize = 0;
1468
1469 if (xfs_has_v3inodes(mp)) {
1470 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
1471 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1472 else
1473 ip->i_cowextsize = 0;
1474 }
1475
1476 skip_xattr:
1477 error = xfs_trans_commit(tp);
1478
1479 /*
1480 * Release any dquot(s) the inode had kept before chown.
1481 */
1482 xfs_qm_dqrele(olddquot);
1483 xfs_qm_dqrele(pdqp);
1484
1485 return error;
1486
1487 error_trans_cancel:
1488 xfs_trans_cancel(tp);
1489 error_free_dquots:
1490 xfs_qm_dqrele(pdqp);
1491 return error;
1492 }
1493
1494 static bool
xfs_getbmap_format(struct kgetbmap * p,struct getbmapx __user * u,size_t recsize)1495 xfs_getbmap_format(
1496 struct kgetbmap *p,
1497 struct getbmapx __user *u,
1498 size_t recsize)
1499 {
1500 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1501 put_user(p->bmv_block, &u->bmv_block) ||
1502 put_user(p->bmv_length, &u->bmv_length) ||
1503 put_user(0, &u->bmv_count) ||
1504 put_user(0, &u->bmv_entries))
1505 return false;
1506 if (recsize < sizeof(struct getbmapx))
1507 return true;
1508 if (put_user(0, &u->bmv_iflags) ||
1509 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1510 put_user(0, &u->bmv_unused1) ||
1511 put_user(0, &u->bmv_unused2))
1512 return false;
1513 return true;
1514 }
1515
1516 STATIC int
xfs_ioc_getbmap(struct file * file,unsigned int cmd,void __user * arg)1517 xfs_ioc_getbmap(
1518 struct file *file,
1519 unsigned int cmd,
1520 void __user *arg)
1521 {
1522 struct getbmapx bmx = { 0 };
1523 struct kgetbmap *buf;
1524 size_t recsize;
1525 int error, i;
1526
1527 switch (cmd) {
1528 case XFS_IOC_GETBMAPA:
1529 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1530 fallthrough;
1531 case XFS_IOC_GETBMAP:
1532 /* struct getbmap is a strict subset of struct getbmapx. */
1533 recsize = sizeof(struct getbmap);
1534 break;
1535 case XFS_IOC_GETBMAPX:
1536 recsize = sizeof(struct getbmapx);
1537 break;
1538 default:
1539 return -EINVAL;
1540 }
1541
1542 if (copy_from_user(&bmx, arg, recsize))
1543 return -EFAULT;
1544
1545 if (bmx.bmv_count < 2)
1546 return -EINVAL;
1547 if (bmx.bmv_count > ULONG_MAX / recsize)
1548 return -ENOMEM;
1549
1550 buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL);
1551 if (!buf)
1552 return -ENOMEM;
1553
1554 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1555 if (error)
1556 goto out_free_buf;
1557
1558 error = -EFAULT;
1559 if (copy_to_user(arg, &bmx, recsize))
1560 goto out_free_buf;
1561 arg += recsize;
1562
1563 for (i = 0; i < bmx.bmv_entries; i++) {
1564 if (!xfs_getbmap_format(buf + i, arg, recsize))
1565 goto out_free_buf;
1566 arg += recsize;
1567 }
1568
1569 error = 0;
1570 out_free_buf:
1571 kmem_free(buf);
1572 return error;
1573 }
1574
1575 STATIC int
xfs_ioc_getfsmap(struct xfs_inode * ip,struct fsmap_head __user * arg)1576 xfs_ioc_getfsmap(
1577 struct xfs_inode *ip,
1578 struct fsmap_head __user *arg)
1579 {
1580 struct xfs_fsmap_head xhead = {0};
1581 struct fsmap_head head;
1582 struct fsmap *recs;
1583 unsigned int count;
1584 __u32 last_flags = 0;
1585 bool done = false;
1586 int error;
1587
1588 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1589 return -EFAULT;
1590 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1591 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1592 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1593 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1594 sizeof(head.fmh_keys[1].fmr_reserved)))
1595 return -EINVAL;
1596
1597 /*
1598 * Use an internal memory buffer so that we don't have to copy fsmap
1599 * data to userspace while holding locks. Start by trying to allocate
1600 * up to 128k for the buffer, but fall back to a single page if needed.
1601 */
1602 count = min_t(unsigned int, head.fmh_count,
1603 131072 / sizeof(struct fsmap));
1604 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
1605 if (!recs) {
1606 count = min_t(unsigned int, head.fmh_count,
1607 PAGE_SIZE / sizeof(struct fsmap));
1608 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
1609 if (!recs)
1610 return -ENOMEM;
1611 }
1612
1613 xhead.fmh_iflags = head.fmh_iflags;
1614 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1615 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1616
1617 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1618 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1619
1620 head.fmh_entries = 0;
1621 do {
1622 struct fsmap __user *user_recs;
1623 struct fsmap *last_rec;
1624
1625 user_recs = &arg->fmh_recs[head.fmh_entries];
1626 xhead.fmh_entries = 0;
1627 xhead.fmh_count = min_t(unsigned int, count,
1628 head.fmh_count - head.fmh_entries);
1629
1630 /* Run query, record how many entries we got. */
1631 error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1632 switch (error) {
1633 case 0:
1634 /*
1635 * There are no more records in the result set. Copy
1636 * whatever we got to userspace and break out.
1637 */
1638 done = true;
1639 break;
1640 case -ECANCELED:
1641 /*
1642 * The internal memory buffer is full. Copy whatever
1643 * records we got to userspace and go again if we have
1644 * not yet filled the userspace buffer.
1645 */
1646 error = 0;
1647 break;
1648 default:
1649 goto out_free;
1650 }
1651 head.fmh_entries += xhead.fmh_entries;
1652 head.fmh_oflags = xhead.fmh_oflags;
1653
1654 /*
1655 * If the caller wanted a record count or there aren't any
1656 * new records to return, we're done.
1657 */
1658 if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1659 break;
1660
1661 /* Copy all the records we got out to userspace. */
1662 if (copy_to_user(user_recs, recs,
1663 xhead.fmh_entries * sizeof(struct fsmap))) {
1664 error = -EFAULT;
1665 goto out_free;
1666 }
1667
1668 /* Remember the last record flags we copied to userspace. */
1669 last_rec = &recs[xhead.fmh_entries - 1];
1670 last_flags = last_rec->fmr_flags;
1671
1672 /* Set up the low key for the next iteration. */
1673 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1674 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1675 } while (!done && head.fmh_entries < head.fmh_count);
1676
1677 /*
1678 * If there are no more records in the query result set and we're not
1679 * in counting mode, mark the last record returned with the LAST flag.
1680 */
1681 if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1682 struct fsmap __user *user_rec;
1683
1684 last_flags |= FMR_OF_LAST;
1685 user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1686
1687 if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1688 sizeof(last_flags))) {
1689 error = -EFAULT;
1690 goto out_free;
1691 }
1692 }
1693
1694 /* copy back header */
1695 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1696 error = -EFAULT;
1697 goto out_free;
1698 }
1699
1700 out_free:
1701 kmem_free(recs);
1702 return error;
1703 }
1704
1705 STATIC int
xfs_ioc_scrub_metadata(struct file * file,void __user * arg)1706 xfs_ioc_scrub_metadata(
1707 struct file *file,
1708 void __user *arg)
1709 {
1710 struct xfs_scrub_metadata scrub;
1711 int error;
1712
1713 if (!capable(CAP_SYS_ADMIN))
1714 return -EPERM;
1715
1716 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1717 return -EFAULT;
1718
1719 error = xfs_scrub_metadata(file, &scrub);
1720 if (error)
1721 return error;
1722
1723 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1724 return -EFAULT;
1725
1726 return 0;
1727 }
1728
1729 int
xfs_ioc_swapext(xfs_swapext_t * sxp)1730 xfs_ioc_swapext(
1731 xfs_swapext_t *sxp)
1732 {
1733 xfs_inode_t *ip, *tip;
1734 struct fd f, tmp;
1735 int error = 0;
1736
1737 /* Pull information for the target fd */
1738 f = fdget((int)sxp->sx_fdtarget);
1739 if (!f.file) {
1740 error = -EINVAL;
1741 goto out;
1742 }
1743
1744 if (!(f.file->f_mode & FMODE_WRITE) ||
1745 !(f.file->f_mode & FMODE_READ) ||
1746 (f.file->f_flags & O_APPEND)) {
1747 error = -EBADF;
1748 goto out_put_file;
1749 }
1750
1751 tmp = fdget((int)sxp->sx_fdtmp);
1752 if (!tmp.file) {
1753 error = -EINVAL;
1754 goto out_put_file;
1755 }
1756
1757 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1758 !(tmp.file->f_mode & FMODE_READ) ||
1759 (tmp.file->f_flags & O_APPEND)) {
1760 error = -EBADF;
1761 goto out_put_tmp_file;
1762 }
1763
1764 if (IS_SWAPFILE(file_inode(f.file)) ||
1765 IS_SWAPFILE(file_inode(tmp.file))) {
1766 error = -EINVAL;
1767 goto out_put_tmp_file;
1768 }
1769
1770 /*
1771 * We need to ensure that the fds passed in point to XFS inodes
1772 * before we cast and access them as XFS structures as we have no
1773 * control over what the user passes us here.
1774 */
1775 if (f.file->f_op != &xfs_file_operations ||
1776 tmp.file->f_op != &xfs_file_operations) {
1777 error = -EINVAL;
1778 goto out_put_tmp_file;
1779 }
1780
1781 ip = XFS_I(file_inode(f.file));
1782 tip = XFS_I(file_inode(tmp.file));
1783
1784 if (ip->i_mount != tip->i_mount) {
1785 error = -EINVAL;
1786 goto out_put_tmp_file;
1787 }
1788
1789 if (ip->i_ino == tip->i_ino) {
1790 error = -EINVAL;
1791 goto out_put_tmp_file;
1792 }
1793
1794 if (xfs_is_shutdown(ip->i_mount)) {
1795 error = -EIO;
1796 goto out_put_tmp_file;
1797 }
1798
1799 error = xfs_swap_extents(ip, tip, sxp);
1800
1801 out_put_tmp_file:
1802 fdput(tmp);
1803 out_put_file:
1804 fdput(f);
1805 out:
1806 return error;
1807 }
1808
1809 static int
xfs_ioc_getlabel(struct xfs_mount * mp,char __user * user_label)1810 xfs_ioc_getlabel(
1811 struct xfs_mount *mp,
1812 char __user *user_label)
1813 {
1814 struct xfs_sb *sbp = &mp->m_sb;
1815 char label[XFSLABEL_MAX + 1];
1816
1817 /* Paranoia */
1818 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1819
1820 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1821 memset(label, 0, sizeof(label));
1822 spin_lock(&mp->m_sb_lock);
1823 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1824 spin_unlock(&mp->m_sb_lock);
1825
1826 if (copy_to_user(user_label, label, sizeof(label)))
1827 return -EFAULT;
1828 return 0;
1829 }
1830
1831 static int
xfs_ioc_setlabel(struct file * filp,struct xfs_mount * mp,char __user * newlabel)1832 xfs_ioc_setlabel(
1833 struct file *filp,
1834 struct xfs_mount *mp,
1835 char __user *newlabel)
1836 {
1837 struct xfs_sb *sbp = &mp->m_sb;
1838 char label[XFSLABEL_MAX + 1];
1839 size_t len;
1840 int error;
1841
1842 if (!capable(CAP_SYS_ADMIN))
1843 return -EPERM;
1844 /*
1845 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1846 * smaller, at 12 bytes. We copy one more to be sure we find the
1847 * (required) NULL character to test the incoming label length.
1848 * NB: The on disk label doesn't need to be null terminated.
1849 */
1850 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1851 return -EFAULT;
1852 len = strnlen(label, XFSLABEL_MAX + 1);
1853 if (len > sizeof(sbp->sb_fname))
1854 return -EINVAL;
1855
1856 error = mnt_want_write_file(filp);
1857 if (error)
1858 return error;
1859
1860 spin_lock(&mp->m_sb_lock);
1861 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1862 memcpy(sbp->sb_fname, label, len);
1863 spin_unlock(&mp->m_sb_lock);
1864
1865 /*
1866 * Now we do several things to satisfy userspace.
1867 * In addition to normal logging of the primary superblock, we also
1868 * immediately write these changes to sector zero for the primary, then
1869 * update all backup supers (as xfs_db does for a label change), then
1870 * invalidate the block device page cache. This is so that any prior
1871 * buffered reads from userspace (i.e. from blkid) are invalidated,
1872 * and userspace will see the newly-written label.
1873 */
1874 error = xfs_sync_sb_buf(mp);
1875 if (error)
1876 goto out;
1877 /*
1878 * growfs also updates backup supers so lock against that.
1879 */
1880 mutex_lock(&mp->m_growlock);
1881 error = xfs_update_secondary_sbs(mp);
1882 mutex_unlock(&mp->m_growlock);
1883
1884 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1885
1886 out:
1887 mnt_drop_write_file(filp);
1888 return error;
1889 }
1890
1891 static inline int
xfs_fs_eofblocks_from_user(struct xfs_fs_eofblocks * src,struct xfs_icwalk * dst)1892 xfs_fs_eofblocks_from_user(
1893 struct xfs_fs_eofblocks *src,
1894 struct xfs_icwalk *dst)
1895 {
1896 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1897 return -EINVAL;
1898
1899 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1900 return -EINVAL;
1901
1902 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1903 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1904 return -EINVAL;
1905
1906 dst->icw_flags = 0;
1907 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
1908 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
1909 if (src->eof_flags & XFS_EOF_FLAGS_UID)
1910 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
1911 if (src->eof_flags & XFS_EOF_FLAGS_GID)
1912 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
1913 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
1914 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
1915 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
1916 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
1917
1918 dst->icw_prid = src->eof_prid;
1919 dst->icw_min_file_size = src->eof_min_file_size;
1920
1921 dst->icw_uid = INVALID_UID;
1922 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
1923 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1924 if (!uid_valid(dst->icw_uid))
1925 return -EINVAL;
1926 }
1927
1928 dst->icw_gid = INVALID_GID;
1929 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
1930 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1931 if (!gid_valid(dst->icw_gid))
1932 return -EINVAL;
1933 }
1934 return 0;
1935 }
1936
1937 /*
1938 * Note: some of the ioctl's return positive numbers as a
1939 * byte count indicating success, such as readlink_by_handle.
1940 * So we don't "sign flip" like most other routines. This means
1941 * true errors need to be returned as a negative value.
1942 */
1943 long
xfs_file_ioctl(struct file * filp,unsigned int cmd,unsigned long p)1944 xfs_file_ioctl(
1945 struct file *filp,
1946 unsigned int cmd,
1947 unsigned long p)
1948 {
1949 struct inode *inode = file_inode(filp);
1950 struct xfs_inode *ip = XFS_I(inode);
1951 struct xfs_mount *mp = ip->i_mount;
1952 void __user *arg = (void __user *)p;
1953 int error;
1954
1955 trace_xfs_file_ioctl(ip);
1956
1957 switch (cmd) {
1958 case FITRIM:
1959 return xfs_ioc_trim(mp, arg);
1960 case FS_IOC_GETFSLABEL:
1961 return xfs_ioc_getlabel(mp, arg);
1962 case FS_IOC_SETFSLABEL:
1963 return xfs_ioc_setlabel(filp, mp, arg);
1964 case XFS_IOC_ALLOCSP:
1965 case XFS_IOC_FREESP:
1966 case XFS_IOC_ALLOCSP64:
1967 case XFS_IOC_FREESP64: {
1968 xfs_flock64_t bf;
1969
1970 if (copy_from_user(&bf, arg, sizeof(bf)))
1971 return -EFAULT;
1972 return xfs_ioc_space(filp, &bf);
1973 }
1974 case XFS_IOC_DIOINFO: {
1975 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1976 struct dioattr da;
1977
1978 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1979 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1980
1981 if (copy_to_user(arg, &da, sizeof(da)))
1982 return -EFAULT;
1983 return 0;
1984 }
1985
1986 case XFS_IOC_FSBULKSTAT_SINGLE:
1987 case XFS_IOC_FSBULKSTAT:
1988 case XFS_IOC_FSINUMBERS:
1989 return xfs_ioc_fsbulkstat(filp, cmd, arg);
1990
1991 case XFS_IOC_BULKSTAT:
1992 return xfs_ioc_bulkstat(filp, cmd, arg);
1993 case XFS_IOC_INUMBERS:
1994 return xfs_ioc_inumbers(mp, cmd, arg);
1995
1996 case XFS_IOC_FSGEOMETRY_V1:
1997 return xfs_ioc_fsgeometry(mp, arg, 3);
1998 case XFS_IOC_FSGEOMETRY_V4:
1999 return xfs_ioc_fsgeometry(mp, arg, 4);
2000 case XFS_IOC_FSGEOMETRY:
2001 return xfs_ioc_fsgeometry(mp, arg, 5);
2002
2003 case XFS_IOC_AG_GEOMETRY:
2004 return xfs_ioc_ag_geometry(mp, arg);
2005
2006 case XFS_IOC_GETVERSION:
2007 return put_user(inode->i_generation, (int __user *)arg);
2008
2009 case XFS_IOC_FSGETXATTRA:
2010 return xfs_ioc_fsgetxattra(ip, arg);
2011
2012 case XFS_IOC_GETBMAP:
2013 case XFS_IOC_GETBMAPA:
2014 case XFS_IOC_GETBMAPX:
2015 return xfs_ioc_getbmap(filp, cmd, arg);
2016
2017 case FS_IOC_GETFSMAP:
2018 return xfs_ioc_getfsmap(ip, arg);
2019
2020 case XFS_IOC_SCRUB_METADATA:
2021 return xfs_ioc_scrub_metadata(filp, arg);
2022
2023 case XFS_IOC_FD_TO_HANDLE:
2024 case XFS_IOC_PATH_TO_HANDLE:
2025 case XFS_IOC_PATH_TO_FSHANDLE: {
2026 xfs_fsop_handlereq_t hreq;
2027
2028 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2029 return -EFAULT;
2030 return xfs_find_handle(cmd, &hreq);
2031 }
2032 case XFS_IOC_OPEN_BY_HANDLE: {
2033 xfs_fsop_handlereq_t hreq;
2034
2035 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2036 return -EFAULT;
2037 return xfs_open_by_handle(filp, &hreq);
2038 }
2039
2040 case XFS_IOC_READLINK_BY_HANDLE: {
2041 xfs_fsop_handlereq_t hreq;
2042
2043 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2044 return -EFAULT;
2045 return xfs_readlink_by_handle(filp, &hreq);
2046 }
2047 case XFS_IOC_ATTRLIST_BY_HANDLE:
2048 return xfs_attrlist_by_handle(filp, arg);
2049
2050 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2051 return xfs_attrmulti_by_handle(filp, arg);
2052
2053 case XFS_IOC_SWAPEXT: {
2054 struct xfs_swapext sxp;
2055
2056 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2057 return -EFAULT;
2058 error = mnt_want_write_file(filp);
2059 if (error)
2060 return error;
2061 error = xfs_ioc_swapext(&sxp);
2062 mnt_drop_write_file(filp);
2063 return error;
2064 }
2065
2066 case XFS_IOC_FSCOUNTS: {
2067 xfs_fsop_counts_t out;
2068
2069 xfs_fs_counts(mp, &out);
2070
2071 if (copy_to_user(arg, &out, sizeof(out)))
2072 return -EFAULT;
2073 return 0;
2074 }
2075
2076 case XFS_IOC_SET_RESBLKS: {
2077 xfs_fsop_resblks_t inout;
2078 uint64_t in;
2079
2080 if (!capable(CAP_SYS_ADMIN))
2081 return -EPERM;
2082
2083 if (xfs_is_readonly(mp))
2084 return -EROFS;
2085
2086 if (copy_from_user(&inout, arg, sizeof(inout)))
2087 return -EFAULT;
2088
2089 error = mnt_want_write_file(filp);
2090 if (error)
2091 return error;
2092
2093 /* input parameter is passed in resblks field of structure */
2094 in = inout.resblks;
2095 error = xfs_reserve_blocks(mp, &in, &inout);
2096 mnt_drop_write_file(filp);
2097 if (error)
2098 return error;
2099
2100 if (copy_to_user(arg, &inout, sizeof(inout)))
2101 return -EFAULT;
2102 return 0;
2103 }
2104
2105 case XFS_IOC_GET_RESBLKS: {
2106 xfs_fsop_resblks_t out;
2107
2108 if (!capable(CAP_SYS_ADMIN))
2109 return -EPERM;
2110
2111 error = xfs_reserve_blocks(mp, NULL, &out);
2112 if (error)
2113 return error;
2114
2115 if (copy_to_user(arg, &out, sizeof(out)))
2116 return -EFAULT;
2117
2118 return 0;
2119 }
2120
2121 case XFS_IOC_FSGROWFSDATA: {
2122 struct xfs_growfs_data in;
2123
2124 if (copy_from_user(&in, arg, sizeof(in)))
2125 return -EFAULT;
2126
2127 error = mnt_want_write_file(filp);
2128 if (error)
2129 return error;
2130 error = xfs_growfs_data(mp, &in);
2131 mnt_drop_write_file(filp);
2132 return error;
2133 }
2134
2135 case XFS_IOC_FSGROWFSLOG: {
2136 struct xfs_growfs_log in;
2137
2138 if (copy_from_user(&in, arg, sizeof(in)))
2139 return -EFAULT;
2140
2141 error = mnt_want_write_file(filp);
2142 if (error)
2143 return error;
2144 error = xfs_growfs_log(mp, &in);
2145 mnt_drop_write_file(filp);
2146 return error;
2147 }
2148
2149 case XFS_IOC_FSGROWFSRT: {
2150 xfs_growfs_rt_t in;
2151
2152 if (copy_from_user(&in, arg, sizeof(in)))
2153 return -EFAULT;
2154
2155 error = mnt_want_write_file(filp);
2156 if (error)
2157 return error;
2158 error = xfs_growfs_rt(mp, &in);
2159 mnt_drop_write_file(filp);
2160 return error;
2161 }
2162
2163 case XFS_IOC_GOINGDOWN: {
2164 uint32_t in;
2165
2166 if (!capable(CAP_SYS_ADMIN))
2167 return -EPERM;
2168
2169 if (get_user(in, (uint32_t __user *)arg))
2170 return -EFAULT;
2171
2172 return xfs_fs_goingdown(mp, in);
2173 }
2174
2175 case XFS_IOC_ERROR_INJECTION: {
2176 xfs_error_injection_t in;
2177
2178 if (!capable(CAP_SYS_ADMIN))
2179 return -EPERM;
2180
2181 if (copy_from_user(&in, arg, sizeof(in)))
2182 return -EFAULT;
2183
2184 return xfs_errortag_add(mp, in.errtag);
2185 }
2186
2187 case XFS_IOC_ERROR_CLEARALL:
2188 if (!capable(CAP_SYS_ADMIN))
2189 return -EPERM;
2190
2191 return xfs_errortag_clearall(mp);
2192
2193 case XFS_IOC_FREE_EOFBLOCKS: {
2194 struct xfs_fs_eofblocks eofb;
2195 struct xfs_icwalk icw;
2196
2197 if (!capable(CAP_SYS_ADMIN))
2198 return -EPERM;
2199
2200 if (xfs_is_readonly(mp))
2201 return -EROFS;
2202
2203 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2204 return -EFAULT;
2205
2206 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
2207 if (error)
2208 return error;
2209
2210 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
2211
2212 sb_start_write(mp->m_super);
2213 error = xfs_blockgc_free_space(mp, &icw);
2214 sb_end_write(mp->m_super);
2215 return error;
2216 }
2217
2218 default:
2219 return -ENOTTY;
2220 }
2221 }
2222
