1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_alloc.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_dinode.h"
30 #include "xfs_inode.h"
31 #include "xfs_ioctl.h"
32 #include "xfs_rtalloc.h"
33 #include "xfs_itable.h"
34 #include "xfs_error.h"
35 #include "xfs_attr.h"
36 #include "xfs_bmap.h"
37 #include "xfs_buf_item.h"
38 #include "xfs_utils.h"
39 #include "xfs_dfrag.h"
40 #include "xfs_fsops.h"
41 #include "xfs_vnodeops.h"
42 #include "xfs_discard.h"
43 #include "xfs_quota.h"
44 #include "xfs_inode_item.h"
45 #include "xfs_export.h"
46 #include "xfs_trace.h"
47
48 #include <linux/capability.h>
49 #include <linux/dcache.h>
50 #include <linux/mount.h>
51 #include <linux/namei.h>
52 #include <linux/pagemap.h>
53 #include <linux/slab.h>
54 #include <linux/exportfs.h>
55
56 /*
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
59 *
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
66 */
67 int
xfs_find_handle(unsigned int cmd,xfs_fsop_handlereq_t * hreq)68 xfs_find_handle(
69 unsigned int cmd,
70 xfs_fsop_handlereq_t *hreq)
71 {
72 int hsize;
73 xfs_handle_t handle;
74 struct inode *inode;
75 struct file *file = NULL;
76 struct path path;
77 int error;
78 struct xfs_inode *ip;
79
80 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 file = fget(hreq->fd);
82 if (!file)
83 return -EBADF;
84 inode = file->f_path.dentry->d_inode;
85 } else {
86 error = user_lpath((const char __user *)hreq->path, &path);
87 if (error)
88 return error;
89 inode = path.dentry->d_inode;
90 }
91 ip = XFS_I(inode);
92
93 /*
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
96 */
97 error = -EINVAL;
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 goto out_put;
100
101 error = -EBADF;
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
105 goto out_put;
106
107
108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109
110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 /*
112 * This handle only contains an fsid, zero the rest.
113 */
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
116 } else {
117 int lock_mode;
118
119 lock_mode = xfs_ilock_map_shared(ip);
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 xfs_iunlock_map_shared(ip, lock_mode);
126
127 hsize = XFS_HSIZE(handle);
128 }
129
130 error = -EFAULT;
131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
133 goto out_put;
134
135 error = 0;
136
137 out_put:
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 fput(file);
140 else
141 path_put(&path);
142 return error;
143 }
144
145 /*
146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
148 */
149 STATIC int
xfs_handle_acceptable(void * context,struct dentry * dentry)150 xfs_handle_acceptable(
151 void *context,
152 struct dentry *dentry)
153 {
154 return 1;
155 }
156
157 /*
158 * Convert userspace handle data into a dentry.
159 */
160 struct dentry *
xfs_handle_to_dentry(struct file * parfilp,void __user * uhandle,u32 hlen)161 xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
164 u32 hlen)
165 {
166 xfs_handle_t handle;
167 struct xfs_fid64 fid;
168
169 /*
170 * Only allow handle opens under a directory.
171 */
172 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
173 return ERR_PTR(-ENOTDIR);
174
175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
182
183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
186
187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
190 }
191
192 STATIC struct dentry *
xfs_handlereq_to_dentry(struct file * parfilp,xfs_fsop_handlereq_t * hreq)193 xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196 {
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
198 }
199
200 int
xfs_open_by_handle(struct file * parfilp,xfs_fsop_handlereq_t * hreq)201 xfs_open_by_handle(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
204 {
205 const struct cred *cred = current_cred();
206 int error;
207 int fd;
208 int permflag;
209 struct file *filp;
210 struct inode *inode;
211 struct dentry *dentry;
212 fmode_t fmode;
213
214 if (!capable(CAP_SYS_ADMIN))
215 return -XFS_ERROR(EPERM);
216
217 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 if (IS_ERR(dentry))
219 return PTR_ERR(dentry);
220 inode = dentry->d_inode;
221
222 /* Restrict xfs_open_by_handle to directories & regular files. */
223 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
224 error = -XFS_ERROR(EPERM);
225 goto out_dput;
226 }
227
228 #if BITS_PER_LONG != 32
229 hreq->oflags |= O_LARGEFILE;
230 #endif
231
232 permflag = hreq->oflags;
233 fmode = OPEN_FMODE(permflag);
234 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
235 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
236 error = -XFS_ERROR(EPERM);
237 goto out_dput;
238 }
239
240 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
241 error = -XFS_ERROR(EACCES);
242 goto out_dput;
243 }
244
245 /* Can't write directories. */
246 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
247 error = -XFS_ERROR(EISDIR);
248 goto out_dput;
249 }
250
251 fd = get_unused_fd();
252 if (fd < 0) {
253 error = fd;
254 goto out_dput;
255 }
256
257 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
258 hreq->oflags, cred);
259 if (IS_ERR(filp)) {
260 put_unused_fd(fd);
261 return PTR_ERR(filp);
262 }
263
264 if (S_ISREG(inode->i_mode)) {
265 filp->f_flags |= O_NOATIME;
266 filp->f_mode |= FMODE_NOCMTIME;
267 }
268
269 fd_install(fd, filp);
270 return fd;
271
272 out_dput:
273 dput(dentry);
274 return error;
275 }
276
277 /*
278 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
279 * unused first argument.
280 */
281 STATIC int
do_readlink(char __user * buffer,int buflen,const char * link)282 do_readlink(
283 char __user *buffer,
284 int buflen,
285 const char *link)
286 {
287 int len;
288
289 len = PTR_ERR(link);
290 if (IS_ERR(link))
291 goto out;
292
293 len = strlen(link);
294 if (len > (unsigned) buflen)
295 len = buflen;
296 if (copy_to_user(buffer, link, len))
297 len = -EFAULT;
298 out:
299 return len;
300 }
301
302
303 int
xfs_readlink_by_handle(struct file * parfilp,xfs_fsop_handlereq_t * hreq)304 xfs_readlink_by_handle(
305 struct file *parfilp,
306 xfs_fsop_handlereq_t *hreq)
307 {
308 struct dentry *dentry;
309 __u32 olen;
310 void *link;
311 int error;
312
313 if (!capable(CAP_SYS_ADMIN))
314 return -XFS_ERROR(EPERM);
315
316 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
317 if (IS_ERR(dentry))
318 return PTR_ERR(dentry);
319
320 /* Restrict this handle operation to symlinks only. */
321 if (!S_ISLNK(dentry->d_inode->i_mode)) {
322 error = -XFS_ERROR(EINVAL);
323 goto out_dput;
324 }
325
326 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
327 error = -XFS_ERROR(EFAULT);
328 goto out_dput;
329 }
330
331 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
332 if (!link) {
333 error = -XFS_ERROR(ENOMEM);
334 goto out_dput;
335 }
336
337 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
338 if (error)
339 goto out_kfree;
340 error = do_readlink(hreq->ohandle, olen, link);
341 if (error)
342 goto out_kfree;
343
344 out_kfree:
345 kfree(link);
346 out_dput:
347 dput(dentry);
348 return error;
349 }
350
351 STATIC int
xfs_fssetdm_by_handle(struct file * parfilp,void __user * arg)352 xfs_fssetdm_by_handle(
353 struct file *parfilp,
354 void __user *arg)
355 {
356 int error;
357 struct fsdmidata fsd;
358 xfs_fsop_setdm_handlereq_t dmhreq;
359 struct dentry *dentry;
360
361 if (!capable(CAP_MKNOD))
362 return -XFS_ERROR(EPERM);
363 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
364 return -XFS_ERROR(EFAULT);
365
366 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
367 if (IS_ERR(dentry))
368 return PTR_ERR(dentry);
369
370 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
371 error = -XFS_ERROR(EPERM);
372 goto out;
373 }
374
375 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
376 error = -XFS_ERROR(EFAULT);
377 goto out;
378 }
379
380 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
381 fsd.fsd_dmstate);
382
383 out:
384 dput(dentry);
385 return error;
386 }
387
388 STATIC int
xfs_attrlist_by_handle(struct file * parfilp,void __user * arg)389 xfs_attrlist_by_handle(
390 struct file *parfilp,
391 void __user *arg)
392 {
393 int error = -ENOMEM;
394 attrlist_cursor_kern_t *cursor;
395 xfs_fsop_attrlist_handlereq_t al_hreq;
396 struct dentry *dentry;
397 char *kbuf;
398
399 if (!capable(CAP_SYS_ADMIN))
400 return -XFS_ERROR(EPERM);
401 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
402 return -XFS_ERROR(EFAULT);
403 if (al_hreq.buflen < sizeof(struct attrlist) ||
404 al_hreq.buflen > XATTR_LIST_MAX)
405 return -XFS_ERROR(EINVAL);
406
407 /*
408 * Reject flags, only allow namespaces.
409 */
410 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
411 return -XFS_ERROR(EINVAL);
412
413 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
414 if (IS_ERR(dentry))
415 return PTR_ERR(dentry);
416
417 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
418 if (!kbuf)
419 goto out_dput;
420
421 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
422 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
423 al_hreq.flags, cursor);
424 if (error)
425 goto out_kfree;
426
427 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
428 error = -EFAULT;
429
430 out_kfree:
431 kfree(kbuf);
432 out_dput:
433 dput(dentry);
434 return error;
435 }
436
437 int
xfs_attrmulti_attr_get(struct inode * inode,unsigned char * name,unsigned char __user * ubuf,__uint32_t * len,__uint32_t flags)438 xfs_attrmulti_attr_get(
439 struct inode *inode,
440 unsigned char *name,
441 unsigned char __user *ubuf,
442 __uint32_t *len,
443 __uint32_t flags)
444 {
445 unsigned char *kbuf;
446 int error = EFAULT;
447
448 if (*len > XATTR_SIZE_MAX)
449 return EINVAL;
450 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
451 if (!kbuf) {
452 kbuf = kmem_zalloc_large(*len);
453 if (!kbuf)
454 return ENOMEM;
455 }
456
457 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
458 if (error)
459 goto out_kfree;
460
461 if (copy_to_user(ubuf, kbuf, *len))
462 error = EFAULT;
463
464 out_kfree:
465 if (is_vmalloc_addr(kbuf))
466 kmem_free_large(kbuf);
467 else
468 kmem_free(kbuf);
469 return error;
470 }
471
472 int
xfs_attrmulti_attr_set(struct inode * inode,unsigned char * name,const unsigned char __user * ubuf,__uint32_t len,__uint32_t flags)473 xfs_attrmulti_attr_set(
474 struct inode *inode,
475 unsigned char *name,
476 const unsigned char __user *ubuf,
477 __uint32_t len,
478 __uint32_t flags)
479 {
480 unsigned char *kbuf;
481 int error = EFAULT;
482
483 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
484 return EPERM;
485 if (len > XATTR_SIZE_MAX)
486 return EINVAL;
487
488 kbuf = memdup_user(ubuf, len);
489 if (IS_ERR(kbuf))
490 return PTR_ERR(kbuf);
491
492 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
493
494 return error;
495 }
496
497 int
xfs_attrmulti_attr_remove(struct inode * inode,unsigned char * name,__uint32_t flags)498 xfs_attrmulti_attr_remove(
499 struct inode *inode,
500 unsigned char *name,
501 __uint32_t flags)
502 {
503 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
504 return EPERM;
505 return xfs_attr_remove(XFS_I(inode), name, flags);
506 }
507
508 STATIC int
xfs_attrmulti_by_handle(struct file * parfilp,void __user * arg)509 xfs_attrmulti_by_handle(
510 struct file *parfilp,
511 void __user *arg)
512 {
513 int error;
514 xfs_attr_multiop_t *ops;
515 xfs_fsop_attrmulti_handlereq_t am_hreq;
516 struct dentry *dentry;
517 unsigned int i, size;
518 unsigned char *attr_name;
519
520 if (!capable(CAP_SYS_ADMIN))
521 return -XFS_ERROR(EPERM);
522 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
523 return -XFS_ERROR(EFAULT);
524
525 /* overflow check */
526 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
527 return -E2BIG;
528
529 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
530 if (IS_ERR(dentry))
531 return PTR_ERR(dentry);
532
533 error = E2BIG;
534 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
535 if (!size || size > 16 * PAGE_SIZE)
536 goto out_dput;
537
538 ops = memdup_user(am_hreq.ops, size);
539 if (IS_ERR(ops)) {
540 error = PTR_ERR(ops);
541 goto out_dput;
542 }
543
544 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
545 if (!attr_name)
546 goto out_kfree_ops;
547
548 error = 0;
549 for (i = 0; i < am_hreq.opcount; i++) {
550 ops[i].am_error = strncpy_from_user((char *)attr_name,
551 ops[i].am_attrname, MAXNAMELEN);
552 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
553 error = -ERANGE;
554 if (ops[i].am_error < 0)
555 break;
556
557 switch (ops[i].am_opcode) {
558 case ATTR_OP_GET:
559 ops[i].am_error = xfs_attrmulti_attr_get(
560 dentry->d_inode, attr_name,
561 ops[i].am_attrvalue, &ops[i].am_length,
562 ops[i].am_flags);
563 break;
564 case ATTR_OP_SET:
565 ops[i].am_error = mnt_want_write_file(parfilp);
566 if (ops[i].am_error)
567 break;
568 ops[i].am_error = xfs_attrmulti_attr_set(
569 dentry->d_inode, attr_name,
570 ops[i].am_attrvalue, ops[i].am_length,
571 ops[i].am_flags);
572 mnt_drop_write_file(parfilp);
573 break;
574 case ATTR_OP_REMOVE:
575 ops[i].am_error = mnt_want_write_file(parfilp);
576 if (ops[i].am_error)
577 break;
578 ops[i].am_error = xfs_attrmulti_attr_remove(
579 dentry->d_inode, attr_name,
580 ops[i].am_flags);
581 mnt_drop_write_file(parfilp);
582 break;
583 default:
584 ops[i].am_error = EINVAL;
585 }
586 }
587
588 if (copy_to_user(am_hreq.ops, ops, size))
589 error = XFS_ERROR(EFAULT);
590
591 kfree(attr_name);
592 out_kfree_ops:
593 kfree(ops);
594 out_dput:
595 dput(dentry);
596 return -error;
597 }
598
599 int
xfs_ioc_space(struct xfs_inode * ip,struct inode * inode,struct file * filp,int ioflags,unsigned int cmd,xfs_flock64_t * bf)600 xfs_ioc_space(
601 struct xfs_inode *ip,
602 struct inode *inode,
603 struct file *filp,
604 int ioflags,
605 unsigned int cmd,
606 xfs_flock64_t *bf)
607 {
608 int attr_flags = 0;
609 int error;
610
611 /*
612 * Only allow the sys admin to reserve space unless
613 * unwritten extents are enabled.
614 */
615 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
616 !capable(CAP_SYS_ADMIN))
617 return -XFS_ERROR(EPERM);
618
619 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
620 return -XFS_ERROR(EPERM);
621
622 if (!(filp->f_mode & FMODE_WRITE))
623 return -XFS_ERROR(EBADF);
624
625 if (!S_ISREG(inode->i_mode))
626 return -XFS_ERROR(EINVAL);
627
628 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
629 attr_flags |= XFS_ATTR_NONBLOCK;
630
631 if (filp->f_flags & O_DSYNC)
632 attr_flags |= XFS_ATTR_SYNC;
633
634 if (ioflags & IO_INVIS)
635 attr_flags |= XFS_ATTR_DMI;
636
637 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
638 return -error;
639 }
640
641 STATIC int
xfs_ioc_bulkstat(xfs_mount_t * mp,unsigned int cmd,void __user * arg)642 xfs_ioc_bulkstat(
643 xfs_mount_t *mp,
644 unsigned int cmd,
645 void __user *arg)
646 {
647 xfs_fsop_bulkreq_t bulkreq;
648 int count; /* # of records returned */
649 xfs_ino_t inlast; /* last inode number */
650 int done;
651 int error;
652
653 /* done = 1 if there are more stats to get and if bulkstat */
654 /* should be called again (unused here, but used in dmapi) */
655
656 if (!capable(CAP_SYS_ADMIN))
657 return -EPERM;
658
659 if (XFS_FORCED_SHUTDOWN(mp))
660 return -XFS_ERROR(EIO);
661
662 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
663 return -XFS_ERROR(EFAULT);
664
665 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
666 return -XFS_ERROR(EFAULT);
667
668 if ((count = bulkreq.icount) <= 0)
669 return -XFS_ERROR(EINVAL);
670
671 if (bulkreq.ubuffer == NULL)
672 return -XFS_ERROR(EINVAL);
673
674 if (cmd == XFS_IOC_FSINUMBERS)
675 error = xfs_inumbers(mp, &inlast, &count,
676 bulkreq.ubuffer, xfs_inumbers_fmt);
677 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
678 error = xfs_bulkstat_single(mp, &inlast,
679 bulkreq.ubuffer, &done);
680 else /* XFS_IOC_FSBULKSTAT */
681 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
682 sizeof(xfs_bstat_t), bulkreq.ubuffer,
683 &done);
684
685 if (error)
686 return -error;
687
688 if (bulkreq.ocount != NULL) {
689 if (copy_to_user(bulkreq.lastip, &inlast,
690 sizeof(xfs_ino_t)))
691 return -XFS_ERROR(EFAULT);
692
693 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
694 return -XFS_ERROR(EFAULT);
695 }
696
697 return 0;
698 }
699
700 STATIC int
xfs_ioc_fsgeometry_v1(xfs_mount_t * mp,void __user * arg)701 xfs_ioc_fsgeometry_v1(
702 xfs_mount_t *mp,
703 void __user *arg)
704 {
705 xfs_fsop_geom_t fsgeo;
706 int error;
707
708 error = xfs_fs_geometry(mp, &fsgeo, 3);
709 if (error)
710 return -error;
711
712 /*
713 * Caller should have passed an argument of type
714 * xfs_fsop_geom_v1_t. This is a proper subset of the
715 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
716 */
717 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
718 return -XFS_ERROR(EFAULT);
719 return 0;
720 }
721
722 STATIC int
xfs_ioc_fsgeometry(xfs_mount_t * mp,void __user * arg)723 xfs_ioc_fsgeometry(
724 xfs_mount_t *mp,
725 void __user *arg)
726 {
727 xfs_fsop_geom_t fsgeo;
728 int error;
729
730 error = xfs_fs_geometry(mp, &fsgeo, 4);
731 if (error)
732 return -error;
733
734 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
735 return -XFS_ERROR(EFAULT);
736 return 0;
737 }
738
739 /*
740 * Linux extended inode flags interface.
741 */
742
743 STATIC unsigned int
xfs_merge_ioc_xflags(unsigned int flags,unsigned int start)744 xfs_merge_ioc_xflags(
745 unsigned int flags,
746 unsigned int start)
747 {
748 unsigned int xflags = start;
749
750 if (flags & FS_IMMUTABLE_FL)
751 xflags |= XFS_XFLAG_IMMUTABLE;
752 else
753 xflags &= ~XFS_XFLAG_IMMUTABLE;
754 if (flags & FS_APPEND_FL)
755 xflags |= XFS_XFLAG_APPEND;
756 else
757 xflags &= ~XFS_XFLAG_APPEND;
758 if (flags & FS_SYNC_FL)
759 xflags |= XFS_XFLAG_SYNC;
760 else
761 xflags &= ~XFS_XFLAG_SYNC;
762 if (flags & FS_NOATIME_FL)
763 xflags |= XFS_XFLAG_NOATIME;
764 else
765 xflags &= ~XFS_XFLAG_NOATIME;
766 if (flags & FS_NODUMP_FL)
767 xflags |= XFS_XFLAG_NODUMP;
768 else
769 xflags &= ~XFS_XFLAG_NODUMP;
770
771 return xflags;
772 }
773
774 STATIC unsigned int
xfs_di2lxflags(__uint16_t di_flags)775 xfs_di2lxflags(
776 __uint16_t di_flags)
777 {
778 unsigned int flags = 0;
779
780 if (di_flags & XFS_DIFLAG_IMMUTABLE)
781 flags |= FS_IMMUTABLE_FL;
782 if (di_flags & XFS_DIFLAG_APPEND)
783 flags |= FS_APPEND_FL;
784 if (di_flags & XFS_DIFLAG_SYNC)
785 flags |= FS_SYNC_FL;
786 if (di_flags & XFS_DIFLAG_NOATIME)
787 flags |= FS_NOATIME_FL;
788 if (di_flags & XFS_DIFLAG_NODUMP)
789 flags |= FS_NODUMP_FL;
790 return flags;
791 }
792
793 STATIC int
xfs_ioc_fsgetxattr(xfs_inode_t * ip,int attr,void __user * arg)794 xfs_ioc_fsgetxattr(
795 xfs_inode_t *ip,
796 int attr,
797 void __user *arg)
798 {
799 struct fsxattr fa;
800
801 memset(&fa, 0, sizeof(struct fsxattr));
802
803 xfs_ilock(ip, XFS_ILOCK_SHARED);
804 fa.fsx_xflags = xfs_ip2xflags(ip);
805 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
806 fa.fsx_projid = xfs_get_projid(ip);
807
808 if (attr) {
809 if (ip->i_afp) {
810 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
811 fa.fsx_nextents = ip->i_afp->if_bytes /
812 sizeof(xfs_bmbt_rec_t);
813 else
814 fa.fsx_nextents = ip->i_d.di_anextents;
815 } else
816 fa.fsx_nextents = 0;
817 } else {
818 if (ip->i_df.if_flags & XFS_IFEXTENTS)
819 fa.fsx_nextents = ip->i_df.if_bytes /
820 sizeof(xfs_bmbt_rec_t);
821 else
822 fa.fsx_nextents = ip->i_d.di_nextents;
823 }
824 xfs_iunlock(ip, XFS_ILOCK_SHARED);
825
826 if (copy_to_user(arg, &fa, sizeof(fa)))
827 return -EFAULT;
828 return 0;
829 }
830
831 STATIC void
xfs_set_diflags(struct xfs_inode * ip,unsigned int xflags)832 xfs_set_diflags(
833 struct xfs_inode *ip,
834 unsigned int xflags)
835 {
836 unsigned int di_flags;
837
838 /* can't set PREALLOC this way, just preserve it */
839 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
840 if (xflags & XFS_XFLAG_IMMUTABLE)
841 di_flags |= XFS_DIFLAG_IMMUTABLE;
842 if (xflags & XFS_XFLAG_APPEND)
843 di_flags |= XFS_DIFLAG_APPEND;
844 if (xflags & XFS_XFLAG_SYNC)
845 di_flags |= XFS_DIFLAG_SYNC;
846 if (xflags & XFS_XFLAG_NOATIME)
847 di_flags |= XFS_DIFLAG_NOATIME;
848 if (xflags & XFS_XFLAG_NODUMP)
849 di_flags |= XFS_DIFLAG_NODUMP;
850 if (xflags & XFS_XFLAG_PROJINHERIT)
851 di_flags |= XFS_DIFLAG_PROJINHERIT;
852 if (xflags & XFS_XFLAG_NODEFRAG)
853 di_flags |= XFS_DIFLAG_NODEFRAG;
854 if (xflags & XFS_XFLAG_FILESTREAM)
855 di_flags |= XFS_DIFLAG_FILESTREAM;
856 if (S_ISDIR(ip->i_d.di_mode)) {
857 if (xflags & XFS_XFLAG_RTINHERIT)
858 di_flags |= XFS_DIFLAG_RTINHERIT;
859 if (xflags & XFS_XFLAG_NOSYMLINKS)
860 di_flags |= XFS_DIFLAG_NOSYMLINKS;
861 if (xflags & XFS_XFLAG_EXTSZINHERIT)
862 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
863 } else if (S_ISREG(ip->i_d.di_mode)) {
864 if (xflags & XFS_XFLAG_REALTIME)
865 di_flags |= XFS_DIFLAG_REALTIME;
866 if (xflags & XFS_XFLAG_EXTSIZE)
867 di_flags |= XFS_DIFLAG_EXTSIZE;
868 }
869
870 ip->i_d.di_flags = di_flags;
871 }
872
873 STATIC void
xfs_diflags_to_linux(struct xfs_inode * ip)874 xfs_diflags_to_linux(
875 struct xfs_inode *ip)
876 {
877 struct inode *inode = VFS_I(ip);
878 unsigned int xflags = xfs_ip2xflags(ip);
879
880 if (xflags & XFS_XFLAG_IMMUTABLE)
881 inode->i_flags |= S_IMMUTABLE;
882 else
883 inode->i_flags &= ~S_IMMUTABLE;
884 if (xflags & XFS_XFLAG_APPEND)
885 inode->i_flags |= S_APPEND;
886 else
887 inode->i_flags &= ~S_APPEND;
888 if (xflags & XFS_XFLAG_SYNC)
889 inode->i_flags |= S_SYNC;
890 else
891 inode->i_flags &= ~S_SYNC;
892 if (xflags & XFS_XFLAG_NOATIME)
893 inode->i_flags |= S_NOATIME;
894 else
895 inode->i_flags &= ~S_NOATIME;
896 }
897
898 #define FSX_PROJID 1
899 #define FSX_EXTSIZE 2
900 #define FSX_XFLAGS 4
901 #define FSX_NONBLOCK 8
902
903 STATIC int
xfs_ioctl_setattr(xfs_inode_t * ip,struct fsxattr * fa,int mask)904 xfs_ioctl_setattr(
905 xfs_inode_t *ip,
906 struct fsxattr *fa,
907 int mask)
908 {
909 struct xfs_mount *mp = ip->i_mount;
910 struct xfs_trans *tp;
911 unsigned int lock_flags = 0;
912 struct xfs_dquot *udqp = NULL;
913 struct xfs_dquot *gdqp = NULL;
914 struct xfs_dquot *olddquot = NULL;
915 int code;
916
917 trace_xfs_ioctl_setattr(ip);
918
919 if (mp->m_flags & XFS_MOUNT_RDONLY)
920 return XFS_ERROR(EROFS);
921 if (XFS_FORCED_SHUTDOWN(mp))
922 return XFS_ERROR(EIO);
923
924 /*
925 * Disallow 32bit project ids when projid32bit feature is not enabled.
926 */
927 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
928 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
929 return XFS_ERROR(EINVAL);
930
931 /*
932 * If disk quotas is on, we make sure that the dquots do exist on disk,
933 * before we start any other transactions. Trying to do this later
934 * is messy. We don't care to take a readlock to look at the ids
935 * in inode here, because we can't hold it across the trans_reserve.
936 * If the IDs do change before we take the ilock, we're covered
937 * because the i_*dquot fields will get updated anyway.
938 */
939 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
940 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
941 ip->i_d.di_gid, fa->fsx_projid,
942 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
943 if (code)
944 return code;
945 }
946
947 /*
948 * For the other attributes, we acquire the inode lock and
949 * first do an error checking pass.
950 */
951 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
952 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
953 if (code)
954 goto error_return;
955
956 lock_flags = XFS_ILOCK_EXCL;
957 xfs_ilock(ip, lock_flags);
958
959 /*
960 * CAP_FOWNER overrides the following restrictions:
961 *
962 * The user ID of the calling process must be equal
963 * to the file owner ID, except in cases where the
964 * CAP_FSETID capability is applicable.
965 */
966 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
967 code = XFS_ERROR(EPERM);
968 goto error_return;
969 }
970
971 /*
972 * Do a quota reservation only if projid is actually going to change.
973 */
974 if (mask & FSX_PROJID) {
975 if (XFS_IS_QUOTA_RUNNING(mp) &&
976 XFS_IS_PQUOTA_ON(mp) &&
977 xfs_get_projid(ip) != fa->fsx_projid) {
978 ASSERT(tp);
979 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
980 capable(CAP_FOWNER) ?
981 XFS_QMOPT_FORCE_RES : 0);
982 if (code) /* out of quota */
983 goto error_return;
984 }
985 }
986
987 if (mask & FSX_EXTSIZE) {
988 /*
989 * Can't change extent size if any extents are allocated.
990 */
991 if (ip->i_d.di_nextents &&
992 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
993 fa->fsx_extsize)) {
994 code = XFS_ERROR(EINVAL); /* EFBIG? */
995 goto error_return;
996 }
997
998 /*
999 * Extent size must be a multiple of the appropriate block
1000 * size, if set at all. It must also be smaller than the
1001 * maximum extent size supported by the filesystem.
1002 *
1003 * Also, for non-realtime files, limit the extent size hint to
1004 * half the size of the AGs in the filesystem so alignment
1005 * doesn't result in extents larger than an AG.
1006 */
1007 if (fa->fsx_extsize != 0) {
1008 xfs_extlen_t size;
1009 xfs_fsblock_t extsize_fsb;
1010
1011 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1012 if (extsize_fsb > MAXEXTLEN) {
1013 code = XFS_ERROR(EINVAL);
1014 goto error_return;
1015 }
1016
1017 if (XFS_IS_REALTIME_INODE(ip) ||
1018 ((mask & FSX_XFLAGS) &&
1019 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1020 size = mp->m_sb.sb_rextsize <<
1021 mp->m_sb.sb_blocklog;
1022 } else {
1023 size = mp->m_sb.sb_blocksize;
1024 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1025 code = XFS_ERROR(EINVAL);
1026 goto error_return;
1027 }
1028 }
1029
1030 if (fa->fsx_extsize % size) {
1031 code = XFS_ERROR(EINVAL);
1032 goto error_return;
1033 }
1034 }
1035 }
1036
1037
1038 if (mask & FSX_XFLAGS) {
1039 /*
1040 * Can't change realtime flag if any extents are allocated.
1041 */
1042 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1043 (XFS_IS_REALTIME_INODE(ip)) !=
1044 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1045 code = XFS_ERROR(EINVAL); /* EFBIG? */
1046 goto error_return;
1047 }
1048
1049 /*
1050 * If realtime flag is set then must have realtime data.
1051 */
1052 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1053 if ((mp->m_sb.sb_rblocks == 0) ||
1054 (mp->m_sb.sb_rextsize == 0) ||
1055 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1056 code = XFS_ERROR(EINVAL);
1057 goto error_return;
1058 }
1059 }
1060
1061 /*
1062 * Can't modify an immutable/append-only file unless
1063 * we have appropriate permission.
1064 */
1065 if ((ip->i_d.di_flags &
1066 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1067 (fa->fsx_xflags &
1068 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1069 !capable(CAP_LINUX_IMMUTABLE)) {
1070 code = XFS_ERROR(EPERM);
1071 goto error_return;
1072 }
1073 }
1074
1075 xfs_trans_ijoin(tp, ip, 0);
1076
1077 /*
1078 * Change file ownership. Must be the owner or privileged.
1079 */
1080 if (mask & FSX_PROJID) {
1081 /*
1082 * CAP_FSETID overrides the following restrictions:
1083 *
1084 * The set-user-ID and set-group-ID bits of a file will be
1085 * cleared upon successful return from chown()
1086 */
1087 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1088 !capable(CAP_FSETID))
1089 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1090
1091 /*
1092 * Change the ownerships and register quota modifications
1093 * in the transaction.
1094 */
1095 if (xfs_get_projid(ip) != fa->fsx_projid) {
1096 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1097 olddquot = xfs_qm_vop_chown(tp, ip,
1098 &ip->i_gdquot, gdqp);
1099 }
1100 xfs_set_projid(ip, fa->fsx_projid);
1101
1102 /*
1103 * We may have to rev the inode as well as
1104 * the superblock version number since projids didn't
1105 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1106 */
1107 if (ip->i_d.di_version == 1)
1108 xfs_bump_ino_vers2(tp, ip);
1109 }
1110
1111 }
1112
1113 if (mask & FSX_EXTSIZE)
1114 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1115 if (mask & FSX_XFLAGS) {
1116 xfs_set_diflags(ip, fa->fsx_xflags);
1117 xfs_diflags_to_linux(ip);
1118 }
1119
1120 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1121 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1122
1123 XFS_STATS_INC(xs_ig_attrchg);
1124
1125 /*
1126 * If this is a synchronous mount, make sure that the
1127 * transaction goes to disk before returning to the user.
1128 * This is slightly sub-optimal in that truncates require
1129 * two sync transactions instead of one for wsync filesystems.
1130 * One for the truncate and one for the timestamps since we
1131 * don't want to change the timestamps unless we're sure the
1132 * truncate worked. Truncates are less than 1% of the laddis
1133 * mix so this probably isn't worth the trouble to optimize.
1134 */
1135 if (mp->m_flags & XFS_MOUNT_WSYNC)
1136 xfs_trans_set_sync(tp);
1137 code = xfs_trans_commit(tp, 0);
1138 xfs_iunlock(ip, lock_flags);
1139
1140 /*
1141 * Release any dquot(s) the inode had kept before chown.
1142 */
1143 xfs_qm_dqrele(olddquot);
1144 xfs_qm_dqrele(udqp);
1145 xfs_qm_dqrele(gdqp);
1146
1147 return code;
1148
1149 error_return:
1150 xfs_qm_dqrele(udqp);
1151 xfs_qm_dqrele(gdqp);
1152 xfs_trans_cancel(tp, 0);
1153 if (lock_flags)
1154 xfs_iunlock(ip, lock_flags);
1155 return code;
1156 }
1157
1158 STATIC int
xfs_ioc_fssetxattr(xfs_inode_t * ip,struct file * filp,void __user * arg)1159 xfs_ioc_fssetxattr(
1160 xfs_inode_t *ip,
1161 struct file *filp,
1162 void __user *arg)
1163 {
1164 struct fsxattr fa;
1165 unsigned int mask;
1166
1167 if (copy_from_user(&fa, arg, sizeof(fa)))
1168 return -EFAULT;
1169
1170 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1171 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1172 mask |= FSX_NONBLOCK;
1173
1174 return -xfs_ioctl_setattr(ip, &fa, mask);
1175 }
1176
1177 STATIC int
xfs_ioc_getxflags(xfs_inode_t * ip,void __user * arg)1178 xfs_ioc_getxflags(
1179 xfs_inode_t *ip,
1180 void __user *arg)
1181 {
1182 unsigned int flags;
1183
1184 flags = xfs_di2lxflags(ip->i_d.di_flags);
1185 if (copy_to_user(arg, &flags, sizeof(flags)))
1186 return -EFAULT;
1187 return 0;
1188 }
1189
1190 STATIC int
xfs_ioc_setxflags(xfs_inode_t * ip,struct file * filp,void __user * arg)1191 xfs_ioc_setxflags(
1192 xfs_inode_t *ip,
1193 struct file *filp,
1194 void __user *arg)
1195 {
1196 struct fsxattr fa;
1197 unsigned int flags;
1198 unsigned int mask;
1199
1200 if (copy_from_user(&flags, arg, sizeof(flags)))
1201 return -EFAULT;
1202
1203 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1204 FS_NOATIME_FL | FS_NODUMP_FL | \
1205 FS_SYNC_FL))
1206 return -EOPNOTSUPP;
1207
1208 mask = FSX_XFLAGS;
1209 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1210 mask |= FSX_NONBLOCK;
1211 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1212
1213 return -xfs_ioctl_setattr(ip, &fa, mask);
1214 }
1215
1216 STATIC int
xfs_getbmap_format(void ** ap,struct getbmapx * bmv,int * full)1217 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1218 {
1219 struct getbmap __user *base = *ap;
1220
1221 /* copy only getbmap portion (not getbmapx) */
1222 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1223 return XFS_ERROR(EFAULT);
1224
1225 *ap += sizeof(struct getbmap);
1226 return 0;
1227 }
1228
1229 STATIC int
xfs_ioc_getbmap(struct xfs_inode * ip,int ioflags,unsigned int cmd,void __user * arg)1230 xfs_ioc_getbmap(
1231 struct xfs_inode *ip,
1232 int ioflags,
1233 unsigned int cmd,
1234 void __user *arg)
1235 {
1236 struct getbmapx bmx;
1237 int error;
1238
1239 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1240 return -XFS_ERROR(EFAULT);
1241
1242 if (bmx.bmv_count < 2)
1243 return -XFS_ERROR(EINVAL);
1244
1245 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1246 if (ioflags & IO_INVIS)
1247 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1248
1249 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1250 (struct getbmap *)arg+1);
1251 if (error)
1252 return -error;
1253
1254 /* copy back header - only size of getbmap */
1255 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1256 return -XFS_ERROR(EFAULT);
1257 return 0;
1258 }
1259
1260 STATIC int
xfs_getbmapx_format(void ** ap,struct getbmapx * bmv,int * full)1261 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1262 {
1263 struct getbmapx __user *base = *ap;
1264
1265 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1266 return XFS_ERROR(EFAULT);
1267
1268 *ap += sizeof(struct getbmapx);
1269 return 0;
1270 }
1271
1272 STATIC int
xfs_ioc_getbmapx(struct xfs_inode * ip,void __user * arg)1273 xfs_ioc_getbmapx(
1274 struct xfs_inode *ip,
1275 void __user *arg)
1276 {
1277 struct getbmapx bmx;
1278 int error;
1279
1280 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1281 return -XFS_ERROR(EFAULT);
1282
1283 if (bmx.bmv_count < 2)
1284 return -XFS_ERROR(EINVAL);
1285
1286 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1287 return -XFS_ERROR(EINVAL);
1288
1289 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1290 (struct getbmapx *)arg+1);
1291 if (error)
1292 return -error;
1293
1294 /* copy back header */
1295 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1296 return -XFS_ERROR(EFAULT);
1297
1298 return 0;
1299 }
1300
1301 /*
1302 * Note: some of the ioctl's return positive numbers as a
1303 * byte count indicating success, such as readlink_by_handle.
1304 * So we don't "sign flip" like most other routines. This means
1305 * true errors need to be returned as a negative value.
1306 */
1307 long
xfs_file_ioctl(struct file * filp,unsigned int cmd,unsigned long p)1308 xfs_file_ioctl(
1309 struct file *filp,
1310 unsigned int cmd,
1311 unsigned long p)
1312 {
1313 struct inode *inode = filp->f_path.dentry->d_inode;
1314 struct xfs_inode *ip = XFS_I(inode);
1315 struct xfs_mount *mp = ip->i_mount;
1316 void __user *arg = (void __user *)p;
1317 int ioflags = 0;
1318 int error;
1319
1320 if (filp->f_mode & FMODE_NOCMTIME)
1321 ioflags |= IO_INVIS;
1322
1323 trace_xfs_file_ioctl(ip);
1324
1325 switch (cmd) {
1326 case FITRIM:
1327 return xfs_ioc_trim(mp, arg);
1328 case XFS_IOC_ALLOCSP:
1329 case XFS_IOC_FREESP:
1330 case XFS_IOC_RESVSP:
1331 case XFS_IOC_UNRESVSP:
1332 case XFS_IOC_ALLOCSP64:
1333 case XFS_IOC_FREESP64:
1334 case XFS_IOC_RESVSP64:
1335 case XFS_IOC_UNRESVSP64:
1336 case XFS_IOC_ZERO_RANGE: {
1337 xfs_flock64_t bf;
1338
1339 if (copy_from_user(&bf, arg, sizeof(bf)))
1340 return -XFS_ERROR(EFAULT);
1341 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1342 }
1343 case XFS_IOC_DIOINFO: {
1344 struct dioattr da;
1345 xfs_buftarg_t *target =
1346 XFS_IS_REALTIME_INODE(ip) ?
1347 mp->m_rtdev_targp : mp->m_ddev_targp;
1348
1349 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1350 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1351
1352 if (copy_to_user(arg, &da, sizeof(da)))
1353 return -XFS_ERROR(EFAULT);
1354 return 0;
1355 }
1356
1357 case XFS_IOC_FSBULKSTAT_SINGLE:
1358 case XFS_IOC_FSBULKSTAT:
1359 case XFS_IOC_FSINUMBERS:
1360 return xfs_ioc_bulkstat(mp, cmd, arg);
1361
1362 case XFS_IOC_FSGEOMETRY_V1:
1363 return xfs_ioc_fsgeometry_v1(mp, arg);
1364
1365 case XFS_IOC_FSGEOMETRY:
1366 return xfs_ioc_fsgeometry(mp, arg);
1367
1368 case XFS_IOC_GETVERSION:
1369 return put_user(inode->i_generation, (int __user *)arg);
1370
1371 case XFS_IOC_FSGETXATTR:
1372 return xfs_ioc_fsgetxattr(ip, 0, arg);
1373 case XFS_IOC_FSGETXATTRA:
1374 return xfs_ioc_fsgetxattr(ip, 1, arg);
1375 case XFS_IOC_FSSETXATTR:
1376 return xfs_ioc_fssetxattr(ip, filp, arg);
1377 case XFS_IOC_GETXFLAGS:
1378 return xfs_ioc_getxflags(ip, arg);
1379 case XFS_IOC_SETXFLAGS:
1380 return xfs_ioc_setxflags(ip, filp, arg);
1381
1382 case XFS_IOC_FSSETDM: {
1383 struct fsdmidata dmi;
1384
1385 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1386 return -XFS_ERROR(EFAULT);
1387
1388 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1389 dmi.fsd_dmstate);
1390 return -error;
1391 }
1392
1393 case XFS_IOC_GETBMAP:
1394 case XFS_IOC_GETBMAPA:
1395 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1396
1397 case XFS_IOC_GETBMAPX:
1398 return xfs_ioc_getbmapx(ip, arg);
1399
1400 case XFS_IOC_FD_TO_HANDLE:
1401 case XFS_IOC_PATH_TO_HANDLE:
1402 case XFS_IOC_PATH_TO_FSHANDLE: {
1403 xfs_fsop_handlereq_t hreq;
1404
1405 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1406 return -XFS_ERROR(EFAULT);
1407 return xfs_find_handle(cmd, &hreq);
1408 }
1409 case XFS_IOC_OPEN_BY_HANDLE: {
1410 xfs_fsop_handlereq_t hreq;
1411
1412 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1413 return -XFS_ERROR(EFAULT);
1414 return xfs_open_by_handle(filp, &hreq);
1415 }
1416 case XFS_IOC_FSSETDM_BY_HANDLE:
1417 return xfs_fssetdm_by_handle(filp, arg);
1418
1419 case XFS_IOC_READLINK_BY_HANDLE: {
1420 xfs_fsop_handlereq_t hreq;
1421
1422 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1423 return -XFS_ERROR(EFAULT);
1424 return xfs_readlink_by_handle(filp, &hreq);
1425 }
1426 case XFS_IOC_ATTRLIST_BY_HANDLE:
1427 return xfs_attrlist_by_handle(filp, arg);
1428
1429 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1430 return xfs_attrmulti_by_handle(filp, arg);
1431
1432 case XFS_IOC_SWAPEXT: {
1433 struct xfs_swapext sxp;
1434
1435 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1436 return -XFS_ERROR(EFAULT);
1437 error = xfs_swapext(&sxp);
1438 return -error;
1439 }
1440
1441 case XFS_IOC_FSCOUNTS: {
1442 xfs_fsop_counts_t out;
1443
1444 error = xfs_fs_counts(mp, &out);
1445 if (error)
1446 return -error;
1447
1448 if (copy_to_user(arg, &out, sizeof(out)))
1449 return -XFS_ERROR(EFAULT);
1450 return 0;
1451 }
1452
1453 case XFS_IOC_SET_RESBLKS: {
1454 xfs_fsop_resblks_t inout;
1455 __uint64_t in;
1456
1457 if (!capable(CAP_SYS_ADMIN))
1458 return -EPERM;
1459
1460 if (mp->m_flags & XFS_MOUNT_RDONLY)
1461 return -XFS_ERROR(EROFS);
1462
1463 if (copy_from_user(&inout, arg, sizeof(inout)))
1464 return -XFS_ERROR(EFAULT);
1465
1466 /* input parameter is passed in resblks field of structure */
1467 in = inout.resblks;
1468 error = xfs_reserve_blocks(mp, &in, &inout);
1469 if (error)
1470 return -error;
1471
1472 if (copy_to_user(arg, &inout, sizeof(inout)))
1473 return -XFS_ERROR(EFAULT);
1474 return 0;
1475 }
1476
1477 case XFS_IOC_GET_RESBLKS: {
1478 xfs_fsop_resblks_t out;
1479
1480 if (!capable(CAP_SYS_ADMIN))
1481 return -EPERM;
1482
1483 error = xfs_reserve_blocks(mp, NULL, &out);
1484 if (error)
1485 return -error;
1486
1487 if (copy_to_user(arg, &out, sizeof(out)))
1488 return -XFS_ERROR(EFAULT);
1489
1490 return 0;
1491 }
1492
1493 case XFS_IOC_FSGROWFSDATA: {
1494 xfs_growfs_data_t in;
1495
1496 if (copy_from_user(&in, arg, sizeof(in)))
1497 return -XFS_ERROR(EFAULT);
1498
1499 error = xfs_growfs_data(mp, &in);
1500 return -error;
1501 }
1502
1503 case XFS_IOC_FSGROWFSLOG: {
1504 xfs_growfs_log_t in;
1505
1506 if (copy_from_user(&in, arg, sizeof(in)))
1507 return -XFS_ERROR(EFAULT);
1508
1509 error = xfs_growfs_log(mp, &in);
1510 return -error;
1511 }
1512
1513 case XFS_IOC_FSGROWFSRT: {
1514 xfs_growfs_rt_t in;
1515
1516 if (copy_from_user(&in, arg, sizeof(in)))
1517 return -XFS_ERROR(EFAULT);
1518
1519 error = xfs_growfs_rt(mp, &in);
1520 return -error;
1521 }
1522
1523 case XFS_IOC_GOINGDOWN: {
1524 __uint32_t in;
1525
1526 if (!capable(CAP_SYS_ADMIN))
1527 return -EPERM;
1528
1529 if (get_user(in, (__uint32_t __user *)arg))
1530 return -XFS_ERROR(EFAULT);
1531
1532 error = xfs_fs_goingdown(mp, in);
1533 return -error;
1534 }
1535
1536 case XFS_IOC_ERROR_INJECTION: {
1537 xfs_error_injection_t in;
1538
1539 if (!capable(CAP_SYS_ADMIN))
1540 return -EPERM;
1541
1542 if (copy_from_user(&in, arg, sizeof(in)))
1543 return -XFS_ERROR(EFAULT);
1544
1545 error = xfs_errortag_add(in.errtag, mp);
1546 return -error;
1547 }
1548
1549 case XFS_IOC_ERROR_CLEARALL:
1550 if (!capable(CAP_SYS_ADMIN))
1551 return -EPERM;
1552
1553 error = xfs_errortag_clearall(mp, 1);
1554 return -error;
1555
1556 default:
1557 return -ENOTTY;
1558 }
1559 }
1560