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[XFS] Update license/copyright notices to match the prefered SGI
[linux-2.6-block.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
CommitLineData
1da177e4 1/*
7b718769
NS		 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
1da177e4 4 *
7b718769
NS		 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
1da177e4
LT		 7 * published by the Free Software Foundation.
8 *
7b718769
NS		 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.
1da177e4 13 *
7b718769
NS		 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
1da177e4 17 */
1da177e4 18#include "xfs.h"
1da177e4 19#include "xfs_fs.h"
a844f451 20#include "xfs_bit.h"
1da177e4 21#include "xfs_log.h"
a844f451 22#include "xfs_inum.h"
1da177e4
LT		 23#include "xfs_trans.h"
24#include "xfs_sb.h"
a844f451 25#include "xfs_ag.h"
1da177e4
LT		 26#include "xfs_dir.h"
27#include "xfs_dir2.h"
28#include "xfs_alloc.h"
29#include "xfs_dmapi.h"
30#include "xfs_mount.h"
1da177e4 31#include "xfs_bmap_btree.h"
a844f451 32#include "xfs_alloc_btree.h"
1da177e4 33#include "xfs_ialloc_btree.h"
1da177e4 34#include "xfs_dir_sf.h"
a844f451 35#include "xfs_attr_sf.h"
1da177e4
LT		 36#include "xfs_dir2_sf.h"
37#include "xfs_dinode.h"
38#include "xfs_inode.h"
a844f451
NS		 39#include "xfs_btree.h"
40#include "xfs_ialloc.h"
1da177e4 41#include "xfs_rtalloc.h"
1da177e4 42#include "xfs_itable.h"
a844f451 43#include "xfs_error.h"
1da177e4
LT		 44#include "xfs_rw.h"
45#include "xfs_acl.h"
46#include "xfs_cap.h"
47#include "xfs_mac.h"
48#include "xfs_attr.h"
a844f451 49#include "xfs_bmap.h"
1da177e4
LT		 50#include "xfs_buf_item.h"
51#include "xfs_utils.h"
52#include "xfs_dfrag.h"
53#include "xfs_fsops.h"
54
55#include <linux/dcache.h>
56#include <linux/mount.h>
57#include <linux/namei.h>
58#include <linux/pagemap.h>
59
60/*
61 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
62 * a file or fs handle.
63 *
64 * XFS_IOC_PATH_TO_FSHANDLE
65 * returns fs handle for a mount point or path within that mount point
66 * XFS_IOC_FD_TO_HANDLE
67 * returns full handle for a FD opened in user space
68 * XFS_IOC_PATH_TO_HANDLE
69 * returns full handle for a path
70 */
71STATIC int
72xfs_find_handle(
73 unsigned int cmd,
74 void __user *arg)
75{
76 int hsize;
77 xfs_handle_t handle;
78 xfs_fsop_handlereq_t hreq;
79 struct inode *inode;
80 struct vnode *vp;
81
82 if (copy_from_user(&hreq, arg, sizeof(hreq)))
83 return -XFS_ERROR(EFAULT);
84
85 memset((char *)&handle, 0, sizeof(handle));
86
87 switch (cmd) {
88 case XFS_IOC_PATH_TO_FSHANDLE:
89 case XFS_IOC_PATH_TO_HANDLE: {
90 struct nameidata nd;
91 int error;
92
93 error = user_path_walk_link((const char __user *)hreq.path, &nd);
94 if (error)
95 return error;
96
97 ASSERT(nd.dentry);
98 ASSERT(nd.dentry->d_inode);
99 inode = igrab(nd.dentry->d_inode);
100 path_release(&nd);
101 break;
102 }
103
104 case XFS_IOC_FD_TO_HANDLE: {
105 struct file *file;
106
107 file = fget(hreq.fd);
108 if (!file)
109 return -EBADF;
110
111 ASSERT(file->f_dentry);
112 ASSERT(file->f_dentry->d_inode);
113 inode = igrab(file->f_dentry->d_inode);
114 fput(file);
115 break;
116 }
117
118 default:
119 ASSERT(0);
120 return -XFS_ERROR(EINVAL);
121 }
122
123 if (inode->i_sb->s_magic != XFS_SB_MAGIC) {
124 /* we're not in XFS anymore, Toto */
125 iput(inode);
126 return -XFS_ERROR(EINVAL);
127 }
128
0432dab2
CH		 129 switch (inode->i_mode & S_IFMT) {
130 case S_IFREG:
131 case S_IFDIR:
132 case S_IFLNK:
133 break;
134 default:
1da177e4
LT		 135 iput(inode);
136 return -XFS_ERROR(EBADF);
137 }
138
0432dab2
CH		 139 /* we need the vnode */
140 vp = LINVFS_GET_VP(inode);
141
1da177e4
LT		 142 /* now we can grab the fsid */
143 memcpy(&handle.ha_fsid, vp->v_vfsp->vfs_altfsid, sizeof(xfs_fsid_t));
144 hsize = sizeof(xfs_fsid_t);
145
146 if (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
147 xfs_inode_t *ip;
148 bhv_desc_t *bhv;
149 int lock_mode;
150
151 /* need to get access to the xfs_inode to read the generation */
152 bhv = vn_bhv_lookup_unlocked(VN_BHV_HEAD(vp), &xfs_vnodeops);
153 ASSERT(bhv);
154 ip = XFS_BHVTOI(bhv);
155 ASSERT(ip);
156 lock_mode = xfs_ilock_map_shared(ip);
157
158 /* fill in fid section of handle from inode */
159 handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) -
160 sizeof(handle.ha_fid.xfs_fid_len);
161 handle.ha_fid.xfs_fid_pad = 0;
162 handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen;
163 handle.ha_fid.xfs_fid_ino = ip->i_ino;
164
165 xfs_iunlock_map_shared(ip, lock_mode);
166
167 hsize = XFS_HSIZE(handle);
168 }
169
170 /* now copy our handle into the user buffer & write out the size */
171 if (copy_to_user(hreq.ohandle, &handle, hsize) ||
172 copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) {
173 iput(inode);
174 return -XFS_ERROR(EFAULT);
175 }
176
177 iput(inode);
178 return 0;
179}
180
181
182/*
183 * Convert userspace handle data into vnode (and inode).
184 * We [ab]use the fact that all the fsop_handlereq ioctl calls
185 * have a data structure argument whose first component is always
186 * a xfs_fsop_handlereq_t, so we can cast to and from this type.
187 * This allows us to optimise the copy_from_user calls and gives
188 * a handy, shared routine.
189 *
190 * If no error, caller must always VN_RELE the returned vp.
191 */
192STATIC int
193xfs_vget_fsop_handlereq(
194 xfs_mount_t *mp,
195 struct inode *parinode, /* parent inode pointer */
196 xfs_fsop_handlereq_t *hreq,
197 vnode_t **vp,
198 struct inode **inode)
199{
200 void __user *hanp;
201 size_t hlen;
202 xfs_fid_t *xfid;
203 xfs_handle_t *handlep;
204 xfs_handle_t handle;
205 xfs_inode_t *ip;
206 struct inode *inodep;
207 vnode_t *vpp;
208 xfs_ino_t ino;
209 __u32 igen;
210 int error;
211
212 /*
213 * Only allow handle opens under a directory.
214 */
215 if (!S_ISDIR(parinode->i_mode))
216 return XFS_ERROR(ENOTDIR);
217
218 hanp = hreq->ihandle;
219 hlen = hreq->ihandlen;
220 handlep = &handle;
221
222 if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
223 return XFS_ERROR(EINVAL);
224 if (copy_from_user(handlep, hanp, hlen))
225 return XFS_ERROR(EFAULT);
226 if (hlen < sizeof(*handlep))
227 memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen);
228 if (hlen > sizeof(handlep->ha_fsid)) {
229 if (handlep->ha_fid.xfs_fid_len !=
230 (hlen - sizeof(handlep->ha_fsid)
231 - sizeof(handlep->ha_fid.xfs_fid_len))
232 || handlep->ha_fid.xfs_fid_pad)
233 return XFS_ERROR(EINVAL);
234 }
235
236 /*
237 * Crack the handle, obtain the inode # & generation #
238 */
239 xfid = (struct xfs_fid *)&handlep->ha_fid;
240 if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
241 ino = xfid->xfs_fid_ino;
242 igen = xfid->xfs_fid_gen;
243 } else {
244 return XFS_ERROR(EINVAL);
245 }
246
247 /*
248 * Get the XFS inode, building a vnode to go with it.
249 */
250 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
251 if (error)
252 return error;
253 if (ip == NULL)
254 return XFS_ERROR(EIO);
255 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
256 xfs_iput_new(ip, XFS_ILOCK_SHARED);
257 return XFS_ERROR(ENOENT);
258 }
259
260 vpp = XFS_ITOV(ip);
261 inodep = LINVFS_GET_IP(vpp);
262 xfs_iunlock(ip, XFS_ILOCK_SHARED);
263
264 *vp = vpp;
265 *inode = inodep;
266 return 0;
267}
268
269STATIC int
270xfs_open_by_handle(
271 xfs_mount_t *mp,
272 void __user *arg,
273 struct file *parfilp,
274 struct inode *parinode)
275{
276 int error;
277 int new_fd;
278 int permflag;
279 struct file *filp;
280 struct inode *inode;
281 struct dentry *dentry;
282 vnode_t *vp;
283 xfs_fsop_handlereq_t hreq;
284
285 if (!capable(CAP_SYS_ADMIN))
286 return -XFS_ERROR(EPERM);
287 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
288 return -XFS_ERROR(EFAULT);
289
290 error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode);
291 if (error)
292 return -error;
293
294 /* Restrict xfs_open_by_handle to directories & regular files. */
295 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
296 iput(inode);
297 return -XFS_ERROR(EINVAL);
298 }
299
300#if BITS_PER_LONG != 32
301 hreq.oflags |= O_LARGEFILE;
302#endif
303 /* Put open permission in namei format. */
304 permflag = hreq.oflags;
305 if ((permflag+1) & O_ACCMODE)
306 permflag++;
307 if (permflag & O_TRUNC)
308 permflag |= 2;
309
310 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
311 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
312 iput(inode);
313 return -XFS_ERROR(EPERM);
314 }
315
316 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
317 iput(inode);
318 return -XFS_ERROR(EACCES);
319 }
320
321 /* Can't write directories. */
322 if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
323 iput(inode);
324 return -XFS_ERROR(EISDIR);
325 }
326
327 if ((new_fd = get_unused_fd()) < 0) {
328 iput(inode);
329 return new_fd;
330 }
331
332 dentry = d_alloc_anon(inode);
333 if (dentry == NULL) {
334 iput(inode);
335 put_unused_fd(new_fd);
336 return -XFS_ERROR(ENOMEM);
337 }
338
339 /* Ensure umount returns EBUSY on umounts while this file is open. */
340 mntget(parfilp->f_vfsmnt);
341
342 /* Create file pointer. */
343 filp = dentry_open(dentry, parfilp->f_vfsmnt, hreq.oflags);
344 if (IS_ERR(filp)) {
345 put_unused_fd(new_fd);
346 return -XFS_ERROR(-PTR_ERR(filp));
347 }
348 if (inode->i_mode & S_IFREG)
349 filp->f_op = &linvfs_invis_file_operations;
350
351 fd_install(new_fd, filp);
352 return new_fd;
353}
354
355STATIC int
356xfs_readlink_by_handle(
357 xfs_mount_t *mp,
358 void __user *arg,
359 struct file *parfilp,
360 struct inode *parinode)
361{
362 int error;
363 struct iovec aiov;
364 struct uio auio;
365 struct inode *inode;
366 xfs_fsop_handlereq_t hreq;
367 vnode_t *vp;
368 __u32 olen;
369
370 if (!capable(CAP_SYS_ADMIN))
371 return -XFS_ERROR(EPERM);
372 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
373 return -XFS_ERROR(EFAULT);
374
375 error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode);
376 if (error)
377 return -error;
378
379 /* Restrict this handle operation to symlinks only. */
0432dab2 380 if (!S_ISLNK(inode->i_mode)) {
1da177e4
LT		 381 VN_RELE(vp);
382 return -XFS_ERROR(EINVAL);
383 }
384
385 if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) {
386 VN_RELE(vp);
387 return -XFS_ERROR(EFAULT);
388 }
389 aiov.iov_len = olen;
390 aiov.iov_base = hreq.ohandle;
391
392 auio.uio_iov = &aiov;
393 auio.uio_iovcnt = 1;
394 auio.uio_offset = 0;
395 auio.uio_segflg = UIO_USERSPACE;
396 auio.uio_resid = olen;
397
398 VOP_READLINK(vp, &auio, IO_INVIS, NULL, error);
399
400 VN_RELE(vp);
401 return (olen - auio.uio_resid);
402}
403
404STATIC int
405xfs_fssetdm_by_handle(
406 xfs_mount_t *mp,
407 void __user *arg,
408 struct file *parfilp,
409 struct inode *parinode)
410{
411 int error;
412 struct fsdmidata fsd;
413 xfs_fsop_setdm_handlereq_t dmhreq;
414 struct inode *inode;
415 bhv_desc_t *bdp;
416 vnode_t *vp;
417
418 if (!capable(CAP_MKNOD))
419 return -XFS_ERROR(EPERM);
420 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
421 return -XFS_ERROR(EFAULT);
422
423 error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &vp, &inode);
424 if (error)
425 return -error;
426
427 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
428 VN_RELE(vp);
429 return -XFS_ERROR(EPERM);
430 }
431
432 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
433 VN_RELE(vp);
434 return -XFS_ERROR(EFAULT);
435 }
436
437 bdp = bhv_base_unlocked(VN_BHV_HEAD(vp));
438 error = xfs_set_dmattrs(bdp, fsd.fsd_dmevmask, fsd.fsd_dmstate, NULL);
439
440 VN_RELE(vp);
441 if (error)
442 return -error;
443 return 0;
444}
445
446STATIC int
447xfs_attrlist_by_handle(
448 xfs_mount_t *mp,
449 void __user *arg,
450 struct file *parfilp,
451 struct inode *parinode)
452{
453 int error;
454 attrlist_cursor_kern_t *cursor;
455 xfs_fsop_attrlist_handlereq_t al_hreq;
456 struct inode *inode;
457 vnode_t *vp;
458 char *kbuf;
459
460 if (!capable(CAP_SYS_ADMIN))
461 return -XFS_ERROR(EPERM);
462 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
463 return -XFS_ERROR(EFAULT);
464 if (al_hreq.buflen > XATTR_LIST_MAX)
465 return -XFS_ERROR(EINVAL);
466
467 error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq,
468 &vp, &inode);
469 if (error)
470 goto out;
471
472 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
473 if (!kbuf)
474 goto out_vn_rele;
475
476 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
477 VOP_ATTR_LIST(vp, kbuf, al_hreq.buflen, al_hreq.flags,
478 cursor, NULL, error);
479 if (error)
480 goto out_kfree;
481
482 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
483 error = -EFAULT;
484
485 out_kfree:
486 kfree(kbuf);
487 out_vn_rele:
488 VN_RELE(vp);
489 out:
490 return -error;
491}
492
493STATIC int
494xfs_attrmulti_attr_get(
495 struct vnode *vp,
496 char *name,
497 char __user *ubuf,
498 __uint32_t *len,
499 __uint32_t flags)
500{
501 char *kbuf;
502 int error = EFAULT;
503
504 if (*len > XATTR_SIZE_MAX)
505 return EINVAL;
506 kbuf = kmalloc(*len, GFP_KERNEL);
507 if (!kbuf)
508 return ENOMEM;
509
510 VOP_ATTR_GET(vp, name, kbuf, len, flags, NULL, error);
511 if (error)
512 goto out_kfree;
513
514 if (copy_to_user(ubuf, kbuf, *len))
515 error = EFAULT;
516
517 out_kfree:
518 kfree(kbuf);
519 return error;
520}
521
522STATIC int
523xfs_attrmulti_attr_set(
524 struct vnode *vp,
525 char *name,
526 const char __user *ubuf,
527 __uint32_t len,
528 __uint32_t flags)
529{
530 char *kbuf;
531 int error = EFAULT;
532
533 if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
534 return EPERM;
535 if (len > XATTR_SIZE_MAX)
536 return EINVAL;
537
538 kbuf = kmalloc(len, GFP_KERNEL);
539 if (!kbuf)
540 return ENOMEM;
541
542 if (copy_from_user(kbuf, ubuf, len))
543 goto out_kfree;
544
545 VOP_ATTR_SET(vp, name, kbuf, len, flags, NULL, error);
546
547 out_kfree:
548 kfree(kbuf);
549 return error;
550}
551
552STATIC int
553xfs_attrmulti_attr_remove(
554 struct vnode *vp,
555 char *name,
556 __uint32_t flags)
557{
558 int error;
559
560 if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
561 return EPERM;
562
563 VOP_ATTR_REMOVE(vp, name, flags, NULL, error);
564 return error;
565}
566
567STATIC int
568xfs_attrmulti_by_handle(
569 xfs_mount_t *mp,
570 void __user *arg,
571 struct file *parfilp,
572 struct inode *parinode)
573{
574 int error;
575 xfs_attr_multiop_t *ops;
576 xfs_fsop_attrmulti_handlereq_t am_hreq;
577 struct inode *inode;
578 vnode_t *vp;
579 unsigned int i, size;
580 char *attr_name;
581
582 if (!capable(CAP_SYS_ADMIN))
583 return -XFS_ERROR(EPERM);
584 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
585 return -XFS_ERROR(EFAULT);
586
587 error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &vp, &inode);
588 if (error)
589 goto out;
590
591 error = E2BIG;
592 size = am_hreq.opcount * sizeof(attr_multiop_t);
593 if (!size || size > 16 * PAGE_SIZE)
594 goto out_vn_rele;
595
596 error = ENOMEM;
597 ops = kmalloc(size, GFP_KERNEL);
598 if (!ops)
599 goto out_vn_rele;
600
601 error = EFAULT;
602 if (copy_from_user(ops, am_hreq.ops, size))
603 goto out_kfree_ops;
604
605 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
606 if (!attr_name)
607 goto out_kfree_ops;
608
609
610 error = 0;
611 for (i = 0; i < am_hreq.opcount; i++) {
612 ops[i].am_error = strncpy_from_user(attr_name,
613 ops[i].am_attrname, MAXNAMELEN);
614 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
615 error = -ERANGE;
616 if (ops[i].am_error < 0)
617 break;
618
619 switch (ops[i].am_opcode) {
620 case ATTR_OP_GET:
621 ops[i].am_error = xfs_attrmulti_attr_get(vp,
622 attr_name, ops[i].am_attrvalue,
623 &ops[i].am_length, ops[i].am_flags);
624 break;
625 case ATTR_OP_SET:
626 ops[i].am_error = xfs_attrmulti_attr_set(vp,
627 attr_name, ops[i].am_attrvalue,
628 ops[i].am_length, ops[i].am_flags);
629 break;
630 case ATTR_OP_REMOVE:
631 ops[i].am_error = xfs_attrmulti_attr_remove(vp,
632 attr_name, ops[i].am_flags);
633 break;
634 default:
635 ops[i].am_error = EINVAL;
636 }
637 }
638
639 if (copy_to_user(am_hreq.ops, ops, size))
640 error = XFS_ERROR(EFAULT);
641
642 kfree(attr_name);
643 out_kfree_ops:
644 kfree(ops);
645 out_vn_rele:
646 VN_RELE(vp);
647 out:
648 return -error;
649}
650
651/* prototypes for a few of the stack-hungry cases that have
652 * their own functions. Functions are defined after their use
653 * so gcc doesn't get fancy and inline them with -03 */
654
655STATIC int
656xfs_ioc_space(
657 bhv_desc_t *bdp,
658 vnode_t *vp,
659 struct file *filp,
660 int flags,
661 unsigned int cmd,
662 void __user *arg);
663
664STATIC int
665xfs_ioc_bulkstat(
666 xfs_mount_t *mp,
667 unsigned int cmd,
668 void __user *arg);
669
670STATIC int
671xfs_ioc_fsgeometry_v1(
672 xfs_mount_t *mp,
673 void __user *arg);
674
675STATIC int
676xfs_ioc_fsgeometry(
677 xfs_mount_t *mp,
678 void __user *arg);
679
680STATIC int
681xfs_ioc_xattr(
682 vnode_t *vp,
683 xfs_inode_t *ip,
684 struct file *filp,
685 unsigned int cmd,
686 void __user *arg);
687
688STATIC int
689xfs_ioc_getbmap(
690 bhv_desc_t *bdp,
691 struct file *filp,
692 int flags,
693 unsigned int cmd,
694 void __user *arg);
695
696STATIC int
697xfs_ioc_getbmapx(
698 bhv_desc_t *bdp,
699 void __user *arg);
700
701int
702xfs_ioctl(
703 bhv_desc_t *bdp,
704 struct inode *inode,
705 struct file *filp,
706 int ioflags,
707 unsigned int cmd,
708 void __user *arg)
709{
710 int error;
711 vnode_t *vp;
712 xfs_inode_t *ip;
713 xfs_mount_t *mp;
714
715 vp = LINVFS_GET_VP(inode);
716
717 vn_trace_entry(vp, "xfs_ioctl", (inst_t *)__return_address);
718
719 ip = XFS_BHVTOI(bdp);
720 mp = ip->i_mount;
721
722 switch (cmd) {
723
724 case XFS_IOC_ALLOCSP:
725 case XFS_IOC_FREESP:
726 case XFS_IOC_RESVSP:
727 case XFS_IOC_UNRESVSP:
728 case XFS_IOC_ALLOCSP64:
729 case XFS_IOC_FREESP64:
730 case XFS_IOC_RESVSP64:
731 case XFS_IOC_UNRESVSP64:
732 /*
733 * Only allow the sys admin to reserve space unless
734 * unwritten extents are enabled.
735 */
736 if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) &&
737 !capable(CAP_SYS_ADMIN))
738 return -EPERM;
739
740 return xfs_ioc_space(bdp, vp, filp, ioflags, cmd, arg);
741
742 case XFS_IOC_DIOINFO: {
743 struct dioattr da;
744 xfs_buftarg_t *target =
745 (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
746 mp->m_rtdev_targp : mp->m_ddev_targp;
747
748 da.d_mem = da.d_miniosz = 1 << target->pbr_sshift;
749 /* The size dio will do in one go */
750 da.d_maxiosz = 64 * PAGE_CACHE_SIZE;
751
752 if (copy_to_user(arg, &da, sizeof(da)))
753 return -XFS_ERROR(EFAULT);
754 return 0;
755 }
756
757 case XFS_IOC_FSBULKSTAT_SINGLE:
758 case XFS_IOC_FSBULKSTAT:
759 case XFS_IOC_FSINUMBERS:
760 return xfs_ioc_bulkstat(mp, cmd, arg);
761
762 case XFS_IOC_FSGEOMETRY_V1:
763 return xfs_ioc_fsgeometry_v1(mp, arg);
764
765 case XFS_IOC_FSGEOMETRY:
766 return xfs_ioc_fsgeometry(mp, arg);
767
768 case XFS_IOC_GETVERSION:
769 case XFS_IOC_GETXFLAGS:
770 case XFS_IOC_SETXFLAGS:
771 case XFS_IOC_FSGETXATTR:
772 case XFS_IOC_FSSETXATTR:
773 case XFS_IOC_FSGETXATTRA:
774 return xfs_ioc_xattr(vp, ip, filp, cmd, arg);
775
776 case XFS_IOC_FSSETDM: {
777 struct fsdmidata dmi;
778
779 if (copy_from_user(&dmi, arg, sizeof(dmi)))
780 return -XFS_ERROR(EFAULT);
781
782 error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate,
783 NULL);
784 return -error;
785 }
786
787 case XFS_IOC_GETBMAP:
788 case XFS_IOC_GETBMAPA:
789 return xfs_ioc_getbmap(bdp, filp, ioflags, cmd, arg);
790
791 case XFS_IOC_GETBMAPX:
792 return xfs_ioc_getbmapx(bdp, arg);
793
794 case XFS_IOC_FD_TO_HANDLE:
795 case XFS_IOC_PATH_TO_HANDLE:
796 case XFS_IOC_PATH_TO_FSHANDLE:
797 return xfs_find_handle(cmd, arg);
798
799 case XFS_IOC_OPEN_BY_HANDLE:
800 return xfs_open_by_handle(mp, arg, filp, inode);
801
802 case XFS_IOC_FSSETDM_BY_HANDLE:
803 return xfs_fssetdm_by_handle(mp, arg, filp, inode);
804
805 case XFS_IOC_READLINK_BY_HANDLE:
806 return xfs_readlink_by_handle(mp, arg, filp, inode);
807
808 case XFS_IOC_ATTRLIST_BY_HANDLE:
809 return xfs_attrlist_by_handle(mp, arg, filp, inode);
810
811 case XFS_IOC_ATTRMULTI_BY_HANDLE:
812 return xfs_attrmulti_by_handle(mp, arg, filp, inode);
813
814 case XFS_IOC_SWAPEXT: {
815 error = xfs_swapext((struct xfs_swapext __user *)arg);
816 return -error;
817 }
818
819 case XFS_IOC_FSCOUNTS: {
820 xfs_fsop_counts_t out;
821
822 error = xfs_fs_counts(mp, &out);
823 if (error)
824 return -error;
825
826 if (copy_to_user(arg, &out, sizeof(out)))
827 return -XFS_ERROR(EFAULT);
828 return 0;
829 }
830
831 case XFS_IOC_SET_RESBLKS: {
832 xfs_fsop_resblks_t inout;
833 __uint64_t in;
834
835 if (!capable(CAP_SYS_ADMIN))
836 return -EPERM;
837
838 if (copy_from_user(&inout, arg, sizeof(inout)))
839 return -XFS_ERROR(EFAULT);
840
841 /* input parameter is passed in resblks field of structure */
842 in = inout.resblks;
843 error = xfs_reserve_blocks(mp, &in, &inout);
844 if (error)
845 return -error;
846
847 if (copy_to_user(arg, &inout, sizeof(inout)))
848 return -XFS_ERROR(EFAULT);
849 return 0;
850 }
851
852 case XFS_IOC_GET_RESBLKS: {
853 xfs_fsop_resblks_t out;
854
855 if (!capable(CAP_SYS_ADMIN))
856 return -EPERM;
857
858 error = xfs_reserve_blocks(mp, NULL, &out);
859 if (error)
860 return -error;
861
862 if (copy_to_user(arg, &out, sizeof(out)))
863 return -XFS_ERROR(EFAULT);
864
865 return 0;
866 }
867
868 case XFS_IOC_FSGROWFSDATA: {
869 xfs_growfs_data_t in;
870
871 if (!capable(CAP_SYS_ADMIN))
872 return -EPERM;
873
874 if (copy_from_user(&in, arg, sizeof(in)))
875 return -XFS_ERROR(EFAULT);
876
877 error = xfs_growfs_data(mp, &in);
878 return -error;
879 }
880
881 case XFS_IOC_FSGROWFSLOG: {
882 xfs_growfs_log_t in;
883
884 if (!capable(CAP_SYS_ADMIN))
885 return -EPERM;
886
887 if (copy_from_user(&in, arg, sizeof(in)))
888 return -XFS_ERROR(EFAULT);
889
890 error = xfs_growfs_log(mp, &in);
891 return -error;
892 }
893
894 case XFS_IOC_FSGROWFSRT: {
895 xfs_growfs_rt_t in;
896
897 if (!capable(CAP_SYS_ADMIN))
898 return -EPERM;
899
900 if (copy_from_user(&in, arg, sizeof(in)))
901 return -XFS_ERROR(EFAULT);
902
903 error = xfs_growfs_rt(mp, &in);
904 return -error;
905 }
906
907 case XFS_IOC_FREEZE:
908 if (!capable(CAP_SYS_ADMIN))
909 return -EPERM;
910
911 if (inode->i_sb->s_frozen == SB_UNFROZEN)
912 freeze_bdev(inode->i_sb->s_bdev);
913 return 0;
914
915 case XFS_IOC_THAW:
916 if (!capable(CAP_SYS_ADMIN))
917 return -EPERM;
918 if (inode->i_sb->s_frozen != SB_UNFROZEN)
919 thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);
920 return 0;
921
922 case XFS_IOC_GOINGDOWN: {
923 __uint32_t in;
924
925 if (!capable(CAP_SYS_ADMIN))
926 return -EPERM;
927
928 if (get_user(in, (__uint32_t __user *)arg))
929 return -XFS_ERROR(EFAULT);
930
931 error = xfs_fs_goingdown(mp, in);
932 return -error;
933 }
934
935 case XFS_IOC_ERROR_INJECTION: {
936 xfs_error_injection_t in;
937
938 if (!capable(CAP_SYS_ADMIN))
939 return -EPERM;
940
941 if (copy_from_user(&in, arg, sizeof(in)))
942 return -XFS_ERROR(EFAULT);
943
944 error = xfs_errortag_add(in.errtag, mp);
945 return -error;
946 }
947
948 case XFS_IOC_ERROR_CLEARALL:
949 if (!capable(CAP_SYS_ADMIN))
950 return -EPERM;
951
952 error = xfs_errortag_clearall(mp);
953 return -error;
954
955 default:
956 return -ENOTTY;
957 }
958}
959
960STATIC int
961xfs_ioc_space(
962 bhv_desc_t *bdp,
963 vnode_t *vp,
964 struct file *filp,
965 int ioflags,
966 unsigned int cmd,
967 void __user *arg)
968{
969 xfs_flock64_t bf;
970 int attr_flags = 0;
971 int error;
972
973 if (vp->v_inode.i_flags & (S_IMMUTABLE|S_APPEND))
974 return -XFS_ERROR(EPERM);
975
ad4a8ac4 976 if (!(filp->f_mode & FMODE_WRITE))
1da177e4
LT		 977 return -XFS_ERROR(EBADF);
978
0432dab2 979 if (!VN_ISREG(vp))
1da177e4
LT		 980 return -XFS_ERROR(EINVAL);
981
982 if (copy_from_user(&bf, arg, sizeof(bf)))
983 return -XFS_ERROR(EFAULT);
984
985 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
986 attr_flags |= ATTR_NONBLOCK;
987 if (ioflags & IO_INVIS)
988 attr_flags |= ATTR_DMI;
989
990 error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos,
991 NULL, attr_flags);
992 return -error;
993}
994
995STATIC int
996xfs_ioc_bulkstat(
997 xfs_mount_t *mp,
998 unsigned int cmd,
999 void __user *arg)
1000{
1001 xfs_fsop_bulkreq_t bulkreq;
1002 int count; /* # of records returned */
1003 xfs_ino_t inlast; /* last inode number */
1004 int done;
1005 int error;
1006
1007 /* done = 1 if there are more stats to get and if bulkstat */
1008 /* should be called again (unused here, but used in dmapi) */
1009
1010 if (!capable(CAP_SYS_ADMIN))
1011 return -EPERM;
1012
1013 if (XFS_FORCED_SHUTDOWN(mp))
1014 return -XFS_ERROR(EIO);
1015
1016 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
1017 return -XFS_ERROR(EFAULT);
1018
1019 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
1020 return -XFS_ERROR(EFAULT);
1021
1022 if ((count = bulkreq.icount) <= 0)
1023 return -XFS_ERROR(EINVAL);
1024
1025 if (cmd == XFS_IOC_FSINUMBERS)
1026 error = xfs_inumbers(mp, &inlast, &count,
1027 bulkreq.ubuffer);
1028 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
1029 error = xfs_bulkstat_single(mp, &inlast,
1030 bulkreq.ubuffer, &done);
1031 else { /* XFS_IOC_FSBULKSTAT */
1032 if (count == 1 && inlast != 0) {
1033 inlast++;
1034 error = xfs_bulkstat_single(mp, &inlast,
1035 bulkreq.ubuffer, &done);
1036 } else {
1037 error = xfs_bulkstat(mp, &inlast, &count,
1038 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
1039 sizeof(xfs_bstat_t), bulkreq.ubuffer,
1040 BULKSTAT_FG_QUICK, &done);
1041 }
1042 }
1043
1044 if (error)
1045 return -error;
1046
1047 if (bulkreq.ocount != NULL) {
1048 if (copy_to_user(bulkreq.lastip, &inlast,
1049 sizeof(xfs_ino_t)))
1050 return -XFS_ERROR(EFAULT);
1051
1052 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
1053 return -XFS_ERROR(EFAULT);
1054 }
1055
1056 return 0;
1057}
1058
1059STATIC int
1060xfs_ioc_fsgeometry_v1(
1061 xfs_mount_t *mp,
1062 void __user *arg)
1063{
1064 xfs_fsop_geom_v1_t fsgeo;
1065 int error;
1066
1067 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
1068 if (error)
1069 return -error;
1070
1071 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
1072 return -XFS_ERROR(EFAULT);
1073 return 0;
1074}
1075
1076STATIC int
1077xfs_ioc_fsgeometry(
1078 xfs_mount_t *mp,
1079 void __user *arg)
1080{
1081 xfs_fsop_geom_t fsgeo;
1082 int error;
1083
1084 error = xfs_fs_geometry(mp, &fsgeo, 4);
1085 if (error)
1086 return -error;
1087
1088 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
1089 return -XFS_ERROR(EFAULT);
1090 return 0;
1091}
1092
1093/*
1094 * Linux extended inode flags interface.
1095 */
1096#define LINUX_XFLAG_SYNC 0x00000008 /* Synchronous updates */
1097#define LINUX_XFLAG_IMMUTABLE 0x00000010 /* Immutable file */
1098#define LINUX_XFLAG_APPEND 0x00000020 /* writes to file may only append */
1099#define LINUX_XFLAG_NODUMP 0x00000040 /* do not dump file */
1100#define LINUX_XFLAG_NOATIME 0x00000080 /* do not update atime */
1101
1102STATIC unsigned int
1103xfs_merge_ioc_xflags(
1104 unsigned int flags,
1105 unsigned int start)
1106{
1107 unsigned int xflags = start;
1108
1109 if (flags & LINUX_XFLAG_IMMUTABLE)
1110 xflags |= XFS_XFLAG_IMMUTABLE;
1111 else
1112 xflags &= ~XFS_XFLAG_IMMUTABLE;
1113 if (flags & LINUX_XFLAG_APPEND)
1114 xflags |= XFS_XFLAG_APPEND;
1115 else
1116 xflags &= ~XFS_XFLAG_APPEND;
1117 if (flags & LINUX_XFLAG_SYNC)
1118 xflags |= XFS_XFLAG_SYNC;
1119 else
1120 xflags &= ~XFS_XFLAG_SYNC;
1121 if (flags & LINUX_XFLAG_NOATIME)
1122 xflags |= XFS_XFLAG_NOATIME;
1123 else
1124 xflags &= ~XFS_XFLAG_NOATIME;
1125 if (flags & LINUX_XFLAG_NODUMP)
1126 xflags |= XFS_XFLAG_NODUMP;
1127 else
1128 xflags &= ~XFS_XFLAG_NODUMP;
1129
1130 return xflags;
1131}
1132
1133STATIC unsigned int
1134xfs_di2lxflags(
1135 __uint16_t di_flags)
1136{
1137 unsigned int flags = 0;
1138
1139 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1140 flags |= LINUX_XFLAG_IMMUTABLE;
1141 if (di_flags & XFS_DIFLAG_APPEND)
1142 flags |= LINUX_XFLAG_APPEND;
1143 if (di_flags & XFS_DIFLAG_SYNC)
1144 flags |= LINUX_XFLAG_SYNC;
1145 if (di_flags & XFS_DIFLAG_NOATIME)
1146 flags |= LINUX_XFLAG_NOATIME;
1147 if (di_flags & XFS_DIFLAG_NODUMP)
1148 flags |= LINUX_XFLAG_NODUMP;
1149 return flags;
1150}
1151
1152STATIC int
1153xfs_ioc_xattr(
1154 vnode_t *vp,
1155 xfs_inode_t *ip,
1156 struct file *filp,
1157 unsigned int cmd,
1158 void __user *arg)
1159{
1160 struct fsxattr fa;
1161 vattr_t va;
1162 int error;
1163 int attr_flags;
1164 unsigned int flags;
1165
1166 switch (cmd) {
1167 case XFS_IOC_FSGETXATTR: {
77bc5beb
NS		 1168 va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \
1169 XFS_AT_NEXTENTS | XFS_AT_PROJID;
1da177e4
LT		 1170 VOP_GETATTR(vp, &va, 0, NULL, error);
1171 if (error)
1172 return -error;
1173
1174 fa.fsx_xflags = va.va_xflags;
1175 fa.fsx_extsize = va.va_extsize;
1176 fa.fsx_nextents = va.va_nextents;
77bc5beb 1177 fa.fsx_projid = va.va_projid;
1da177e4
LT		 1178
1179 if (copy_to_user(arg, &fa, sizeof(fa)))
1180 return -XFS_ERROR(EFAULT);
1181 return 0;
1182 }
1183
1184 case XFS_IOC_FSSETXATTR: {
1185 if (copy_from_user(&fa, arg, sizeof(fa)))
1186 return -XFS_ERROR(EFAULT);
1187
1188 attr_flags = 0;
1189 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1190 attr_flags |= ATTR_NONBLOCK;
1191
77bc5beb 1192 va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | XFS_AT_PROJID;
1da177e4
LT		 1193 va.va_xflags = fa.fsx_xflags;
1194 va.va_extsize = fa.fsx_extsize;
77bc5beb 1195 va.va_projid = fa.fsx_projid;
1da177e4
LT		 1196
1197 VOP_SETATTR(vp, &va, attr_flags, NULL, error);
1198 if (!error)
1199 vn_revalidate(vp); /* update Linux inode flags */
1200 return -error;
1201 }
1202
1203 case XFS_IOC_FSGETXATTRA: {
77bc5beb
NS		 1204 va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \
1205 XFS_AT_ANEXTENTS | XFS_AT_PROJID;
1da177e4
LT		 1206 VOP_GETATTR(vp, &va, 0, NULL, error);
1207 if (error)
1208 return -error;
1209
1210 fa.fsx_xflags = va.va_xflags;
1211 fa.fsx_extsize = va.va_extsize;
1212 fa.fsx_nextents = va.va_anextents;
77bc5beb 1213 fa.fsx_projid = va.va_projid;
1da177e4
LT		 1214
1215 if (copy_to_user(arg, &fa, sizeof(fa)))
1216 return -XFS_ERROR(EFAULT);
1217 return 0;
1218 }
1219
1220 case XFS_IOC_GETXFLAGS: {
1221 flags = xfs_di2lxflags(ip->i_d.di_flags);
1222 if (copy_to_user(arg, &flags, sizeof(flags)))
1223 return -XFS_ERROR(EFAULT);
1224 return 0;
1225 }
1226
1227 case XFS_IOC_SETXFLAGS: {
1228 if (copy_from_user(&flags, arg, sizeof(flags)))
1229 return -XFS_ERROR(EFAULT);
1230
1231 if (flags & ~(LINUX_XFLAG_IMMUTABLE | LINUX_XFLAG_APPEND | \
1232 LINUX_XFLAG_NOATIME | LINUX_XFLAG_NODUMP | \
1233 LINUX_XFLAG_SYNC))
1234 return -XFS_ERROR(EOPNOTSUPP);
1235
1236 attr_flags = 0;
1237 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1238 attr_flags |= ATTR_NONBLOCK;
1239
1240 va.va_mask = XFS_AT_XFLAGS;
1241 va.va_xflags = xfs_merge_ioc_xflags(flags,
1242 xfs_ip2xflags(ip));
1243
1244 VOP_SETATTR(vp, &va, attr_flags, NULL, error);
1245 if (!error)
1246 vn_revalidate(vp); /* update Linux inode flags */
1247 return -error;
1248 }
1249
1250 case XFS_IOC_GETVERSION: {
1251 flags = LINVFS_GET_IP(vp)->i_generation;
1252 if (copy_to_user(arg, &flags, sizeof(flags)))
1253 return -XFS_ERROR(EFAULT);
1254 return 0;
1255 }
1256
1257 default:
1258 return -ENOTTY;
1259 }
1260}
1261
1262STATIC int
1263xfs_ioc_getbmap(
1264 bhv_desc_t *bdp,
1265 struct file *filp,
1266 int ioflags,
1267 unsigned int cmd,
1268 void __user *arg)
1269{
1270 struct getbmap bm;
1271 int iflags;
1272 int error;
1273
1274 if (copy_from_user(&bm, arg, sizeof(bm)))
1275 return -XFS_ERROR(EFAULT);
1276
1277 if (bm.bmv_count < 2)
1278 return -XFS_ERROR(EINVAL);
1279
1280 iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1281 if (ioflags & IO_INVIS)
1282 iflags |= BMV_IF_NO_DMAPI_READ;
1283
1284 error = xfs_getbmap(bdp, &bm, (struct getbmap __user *)arg+1, iflags);
1285 if (error)
1286 return -error;
1287
1288 if (copy_to_user(arg, &bm, sizeof(bm)))
1289 return -XFS_ERROR(EFAULT);
1290 return 0;
1291}
1292
1293STATIC int
1294xfs_ioc_getbmapx(
1295 bhv_desc_t *bdp,
1296 void __user *arg)
1297{
1298 struct getbmapx bmx;
1299 struct getbmap bm;
1300 int iflags;
1301 int error;
1302
1303 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1304 return -XFS_ERROR(EFAULT);
1305
1306 if (bmx.bmv_count < 2)
1307 return -XFS_ERROR(EINVAL);
1308
1309 /*
1310 * Map input getbmapx structure to a getbmap
1311 * structure for xfs_getbmap.
1312 */
1313 GETBMAP_CONVERT(bmx, bm);
1314
1315 iflags = bmx.bmv_iflags;
1316
1317 if (iflags & (~BMV_IF_VALID))
1318 return -XFS_ERROR(EINVAL);
1319
1320 iflags |= BMV_IF_EXTENDED;
1321
1322 error = xfs_getbmap(bdp, &bm, (struct getbmapx __user *)arg+1, iflags);
1323 if (error)
1324 return -error;
1325
1326 GETBMAP_CONVERT(bm, bmx);
1327
1328 if (copy_to_user(arg, &bmx, sizeof(bmx)))
1329 return -XFS_ERROR(EFAULT);
1330
1331 return 0;
1332}
Linux 6.x block layer and io_uring tree(s)