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[XFS] (mostly) remove xfs_inval_cached_pages Since the last round of
[linux-2.6-block.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
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1da177e4
LT		 1/*
2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32
33#include "xfs.h"
34
35#include "xfs_fs.h"
36#include "xfs_inum.h"
37#include "xfs_log.h"
38#include "xfs_trans.h"
39#include "xfs_sb.h"
40#include "xfs_dir.h"
41#include "xfs_dir2.h"
42#include "xfs_alloc.h"
43#include "xfs_dmapi.h"
44#include "xfs_mount.h"
45#include "xfs_alloc_btree.h"
46#include "xfs_bmap_btree.h"
47#include "xfs_ialloc_btree.h"
48#include "xfs_btree.h"
49#include "xfs_ialloc.h"
50#include "xfs_attr_sf.h"
51#include "xfs_dir_sf.h"
52#include "xfs_dir2_sf.h"
53#include "xfs_dinode.h"
54#include "xfs_inode.h"
55#include "xfs_bmap.h"
56#include "xfs_bit.h"
57#include "xfs_rtalloc.h"
58#include "xfs_error.h"
59#include "xfs_itable.h"
60#include "xfs_rw.h"
61#include "xfs_acl.h"
62#include "xfs_cap.h"
63#include "xfs_mac.h"
64#include "xfs_attr.h"
65#include "xfs_buf_item.h"
66#include "xfs_utils.h"
67#include "xfs_dfrag.h"
68#include "xfs_fsops.h"
69
70#include <linux/dcache.h>
71#include <linux/mount.h>
72#include <linux/namei.h>
73#include <linux/pagemap.h>
74
75/*
76 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
77 * a file or fs handle.
78 *
79 * XFS_IOC_PATH_TO_FSHANDLE
80 * returns fs handle for a mount point or path within that mount point
81 * XFS_IOC_FD_TO_HANDLE
82 * returns full handle for a FD opened in user space
83 * XFS_IOC_PATH_TO_HANDLE
84 * returns full handle for a path
85 */
86STATIC int
87xfs_find_handle(
88 unsigned int cmd,
89 void __user *arg)
90{
91 int hsize;
92 xfs_handle_t handle;
93 xfs_fsop_handlereq_t hreq;
94 struct inode *inode;
95 struct vnode *vp;
96
97 if (copy_from_user(&hreq, arg, sizeof(hreq)))
98 return -XFS_ERROR(EFAULT);
99
100 memset((char *)&handle, 0, sizeof(handle));
101
102 switch (cmd) {
103 case XFS_IOC_PATH_TO_FSHANDLE:
104 case XFS_IOC_PATH_TO_HANDLE: {
105 struct nameidata nd;
106 int error;
107
108 error = user_path_walk_link((const char __user *)hreq.path, &nd);
109 if (error)
110 return error;
111
112 ASSERT(nd.dentry);
113 ASSERT(nd.dentry->d_inode);
114 inode = igrab(nd.dentry->d_inode);
115 path_release(&nd);
116 break;
117 }
118
119 case XFS_IOC_FD_TO_HANDLE: {
120 struct file *file;
121
122 file = fget(hreq.fd);
123 if (!file)
124 return -EBADF;
125
126 ASSERT(file->f_dentry);
127 ASSERT(file->f_dentry->d_inode);
128 inode = igrab(file->f_dentry->d_inode);
129 fput(file);
130 break;
131 }
132
133 default:
134 ASSERT(0);
135 return -XFS_ERROR(EINVAL);
136 }
137
138 if (inode->i_sb->s_magic != XFS_SB_MAGIC) {
139 /* we're not in XFS anymore, Toto */
140 iput(inode);
141 return -XFS_ERROR(EINVAL);
142 }
143
144 /* we need the vnode */
145 vp = LINVFS_GET_VP(inode);
146 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
147 iput(inode);
148 return -XFS_ERROR(EBADF);
149 }
150
151 /* now we can grab the fsid */
152 memcpy(&handle.ha_fsid, vp->v_vfsp->vfs_altfsid, sizeof(xfs_fsid_t));
153 hsize = sizeof(xfs_fsid_t);
154
155 if (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
156 xfs_inode_t *ip;
157 bhv_desc_t *bhv;
158 int lock_mode;
159
160 /* need to get access to the xfs_inode to read the generation */
161 bhv = vn_bhv_lookup_unlocked(VN_BHV_HEAD(vp), &xfs_vnodeops);
162 ASSERT(bhv);
163 ip = XFS_BHVTOI(bhv);
164 ASSERT(ip);
165 lock_mode = xfs_ilock_map_shared(ip);
166
167 /* fill in fid section of handle from inode */
168 handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) -
169 sizeof(handle.ha_fid.xfs_fid_len);
170 handle.ha_fid.xfs_fid_pad = 0;
171 handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen;
172 handle.ha_fid.xfs_fid_ino = ip->i_ino;
173
174 xfs_iunlock_map_shared(ip, lock_mode);
175
176 hsize = XFS_HSIZE(handle);
177 }
178
179 /* now copy our handle into the user buffer & write out the size */
180 if (copy_to_user(hreq.ohandle, &handle, hsize) ||
181 copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) {
182 iput(inode);
183 return -XFS_ERROR(EFAULT);
184 }
185
186 iput(inode);
187 return 0;
188}
189
190
191/*
192 * Convert userspace handle data into vnode (and inode).
193 * We [ab]use the fact that all the fsop_handlereq ioctl calls
194 * have a data structure argument whose first component is always
195 * a xfs_fsop_handlereq_t, so we can cast to and from this type.
196 * This allows us to optimise the copy_from_user calls and gives
197 * a handy, shared routine.
198 *
199 * If no error, caller must always VN_RELE the returned vp.
200 */
201STATIC int
202xfs_vget_fsop_handlereq(
203 xfs_mount_t *mp,
204 struct inode *parinode, /* parent inode pointer */
205 xfs_fsop_handlereq_t *hreq,
206 vnode_t **vp,
207 struct inode **inode)
208{
209 void __user *hanp;
210 size_t hlen;
211 xfs_fid_t *xfid;
212 xfs_handle_t *handlep;
213 xfs_handle_t handle;
214 xfs_inode_t *ip;
215 struct inode *inodep;
216 vnode_t *vpp;
217 xfs_ino_t ino;
218 __u32 igen;
219 int error;
220
221 /*
222 * Only allow handle opens under a directory.
223 */
224 if (!S_ISDIR(parinode->i_mode))
225 return XFS_ERROR(ENOTDIR);
226
227 hanp = hreq->ihandle;
228 hlen = hreq->ihandlen;
229 handlep = &handle;
230
231 if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
232 return XFS_ERROR(EINVAL);
233 if (copy_from_user(handlep, hanp, hlen))
234 return XFS_ERROR(EFAULT);
235 if (hlen < sizeof(*handlep))
236 memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen);
237 if (hlen > sizeof(handlep->ha_fsid)) {
238 if (handlep->ha_fid.xfs_fid_len !=
239 (hlen - sizeof(handlep->ha_fsid)
240 - sizeof(handlep->ha_fid.xfs_fid_len))
241 || handlep->ha_fid.xfs_fid_pad)
242 return XFS_ERROR(EINVAL);
243 }
244
245 /*
246 * Crack the handle, obtain the inode # & generation #
247 */
248 xfid = (struct xfs_fid *)&handlep->ha_fid;
249 if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
250 ino = xfid->xfs_fid_ino;
251 igen = xfid->xfs_fid_gen;
252 } else {
253 return XFS_ERROR(EINVAL);
254 }
255
256 /*
257 * Get the XFS inode, building a vnode to go with it.
258 */
259 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
260 if (error)
261 return error;
262 if (ip == NULL)
263 return XFS_ERROR(EIO);
264 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
265 xfs_iput_new(ip, XFS_ILOCK_SHARED);
266 return XFS_ERROR(ENOENT);
267 }
268
269 vpp = XFS_ITOV(ip);
270 inodep = LINVFS_GET_IP(vpp);
271 xfs_iunlock(ip, XFS_ILOCK_SHARED);
272
273 *vp = vpp;
274 *inode = inodep;
275 return 0;
276}
277
278STATIC int
279xfs_open_by_handle(
280 xfs_mount_t *mp,
281 void __user *arg,
282 struct file *parfilp,
283 struct inode *parinode)
284{
285 int error;
286 int new_fd;
287 int permflag;
288 struct file *filp;
289 struct inode *inode;
290 struct dentry *dentry;
291 vnode_t *vp;
292 xfs_fsop_handlereq_t hreq;
293
294 if (!capable(CAP_SYS_ADMIN))
295 return -XFS_ERROR(EPERM);
296 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
297 return -XFS_ERROR(EFAULT);
298
299 error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode);
300 if (error)
301 return -error;
302
303 /* Restrict xfs_open_by_handle to directories & regular files. */
304 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
305 iput(inode);
306 return -XFS_ERROR(EINVAL);
307 }
308
309#if BITS_PER_LONG != 32
310 hreq.oflags |= O_LARGEFILE;
311#endif
312 /* Put open permission in namei format. */
313 permflag = hreq.oflags;
314 if ((permflag+1) & O_ACCMODE)
315 permflag++;
316 if (permflag & O_TRUNC)
317 permflag |= 2;
318
319 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
320 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
321 iput(inode);
322 return -XFS_ERROR(EPERM);
323 }
324
325 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
326 iput(inode);
327 return -XFS_ERROR(EACCES);
328 }
329
330 /* Can't write directories. */
331 if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
332 iput(inode);
333 return -XFS_ERROR(EISDIR);
334 }
335
336 if ((new_fd = get_unused_fd()) < 0) {
337 iput(inode);
338 return new_fd;
339 }
340
341 dentry = d_alloc_anon(inode);
342 if (dentry == NULL) {
343 iput(inode);
344 put_unused_fd(new_fd);
345 return -XFS_ERROR(ENOMEM);
346 }
347
348 /* Ensure umount returns EBUSY on umounts while this file is open. */
349 mntget(parfilp->f_vfsmnt);
350
351 /* Create file pointer. */
352 filp = dentry_open(dentry, parfilp->f_vfsmnt, hreq.oflags);
353 if (IS_ERR(filp)) {
354 put_unused_fd(new_fd);
355 return -XFS_ERROR(-PTR_ERR(filp));
356 }
357 if (inode->i_mode & S_IFREG)
358 filp->f_op = &linvfs_invis_file_operations;
359
360 fd_install(new_fd, filp);
361 return new_fd;
362}
363
364STATIC int
365xfs_readlink_by_handle(
366 xfs_mount_t *mp,
367 void __user *arg,
368 struct file *parfilp,
369 struct inode *parinode)
370{
371 int error;
372 struct iovec aiov;
373 struct uio auio;
374 struct inode *inode;
375 xfs_fsop_handlereq_t hreq;
376 vnode_t *vp;
377 __u32 olen;
378
379 if (!capable(CAP_SYS_ADMIN))
380 return -XFS_ERROR(EPERM);
381 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
382 return -XFS_ERROR(EFAULT);
383
384 error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode);
385 if (error)
386 return -error;
387
388 /* Restrict this handle operation to symlinks only. */
389 if (vp->v_type != VLNK) {
390 VN_RELE(vp);
391 return -XFS_ERROR(EINVAL);
392 }
393
394 if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) {
395 VN_RELE(vp);
396 return -XFS_ERROR(EFAULT);
397 }
398 aiov.iov_len = olen;
399 aiov.iov_base = hreq.ohandle;
400
401 auio.uio_iov = &aiov;
402 auio.uio_iovcnt = 1;
403 auio.uio_offset = 0;
404 auio.uio_segflg = UIO_USERSPACE;
405 auio.uio_resid = olen;
406
407 VOP_READLINK(vp, &auio, IO_INVIS, NULL, error);
408
409 VN_RELE(vp);
410 return (olen - auio.uio_resid);
411}
412
413STATIC int
414xfs_fssetdm_by_handle(
415 xfs_mount_t *mp,
416 void __user *arg,
417 struct file *parfilp,
418 struct inode *parinode)
419{
420 int error;
421 struct fsdmidata fsd;
422 xfs_fsop_setdm_handlereq_t dmhreq;
423 struct inode *inode;
424 bhv_desc_t *bdp;
425 vnode_t *vp;
426
427 if (!capable(CAP_MKNOD))
428 return -XFS_ERROR(EPERM);
429 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
430 return -XFS_ERROR(EFAULT);
431
432 error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &vp, &inode);
433 if (error)
434 return -error;
435
436 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
437 VN_RELE(vp);
438 return -XFS_ERROR(EPERM);
439 }
440
441 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
442 VN_RELE(vp);
443 return -XFS_ERROR(EFAULT);
444 }
445
446 bdp = bhv_base_unlocked(VN_BHV_HEAD(vp));
447 error = xfs_set_dmattrs(bdp, fsd.fsd_dmevmask, fsd.fsd_dmstate, NULL);
448
449 VN_RELE(vp);
450 if (error)
451 return -error;
452 return 0;
453}
454
455STATIC int
456xfs_attrlist_by_handle(
457 xfs_mount_t *mp,
458 void __user *arg,
459 struct file *parfilp,
460 struct inode *parinode)
461{
462 int error;
463 attrlist_cursor_kern_t *cursor;
464 xfs_fsop_attrlist_handlereq_t al_hreq;
465 struct inode *inode;
466 vnode_t *vp;
467 char *kbuf;
468
469 if (!capable(CAP_SYS_ADMIN))
470 return -XFS_ERROR(EPERM);
471 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
472 return -XFS_ERROR(EFAULT);
473 if (al_hreq.buflen > XATTR_LIST_MAX)
474 return -XFS_ERROR(EINVAL);
475
476 error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq,
477 &vp, &inode);
478 if (error)
479 goto out;
480
481 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
482 if (!kbuf)
483 goto out_vn_rele;
484
485 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
486 VOP_ATTR_LIST(vp, kbuf, al_hreq.buflen, al_hreq.flags,
487 cursor, NULL, error);
488 if (error)
489 goto out_kfree;
490
491 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
492 error = -EFAULT;
493
494 out_kfree:
495 kfree(kbuf);
496 out_vn_rele:
497 VN_RELE(vp);
498 out:
499 return -error;
500}
501
502STATIC int
503xfs_attrmulti_attr_get(
504 struct vnode *vp,
505 char *name,
506 char __user *ubuf,
507 __uint32_t *len,
508 __uint32_t flags)
509{
510 char *kbuf;
511 int error = EFAULT;
512
513 if (*len > XATTR_SIZE_MAX)
514 return EINVAL;
515 kbuf = kmalloc(*len, GFP_KERNEL);
516 if (!kbuf)
517 return ENOMEM;
518
519 VOP_ATTR_GET(vp, name, kbuf, len, flags, NULL, error);
520 if (error)
521 goto out_kfree;
522
523 if (copy_to_user(ubuf, kbuf, *len))
524 error = EFAULT;
525
526 out_kfree:
527 kfree(kbuf);
528 return error;
529}
530
531STATIC int
532xfs_attrmulti_attr_set(
533 struct vnode *vp,
534 char *name,
535 const char __user *ubuf,
536 __uint32_t len,
537 __uint32_t flags)
538{
539 char *kbuf;
540 int error = EFAULT;
541
542 if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
543 return EPERM;
544 if (len > XATTR_SIZE_MAX)
545 return EINVAL;
546
547 kbuf = kmalloc(len, GFP_KERNEL);
548 if (!kbuf)
549 return ENOMEM;
550
551 if (copy_from_user(kbuf, ubuf, len))
552 goto out_kfree;
553
554 VOP_ATTR_SET(vp, name, kbuf, len, flags, NULL, error);
555
556 out_kfree:
557 kfree(kbuf);
558 return error;
559}
560
561STATIC int
562xfs_attrmulti_attr_remove(
563 struct vnode *vp,
564 char *name,
565 __uint32_t flags)
566{
567 int error;
568
569 if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
570 return EPERM;
571
572 VOP_ATTR_REMOVE(vp, name, flags, NULL, error);
573 return error;
574}
575
576STATIC int
577xfs_attrmulti_by_handle(
578 xfs_mount_t *mp,
579 void __user *arg,
580 struct file *parfilp,
581 struct inode *parinode)
582{
583 int error;
584 xfs_attr_multiop_t *ops;
585 xfs_fsop_attrmulti_handlereq_t am_hreq;
586 struct inode *inode;
587 vnode_t *vp;
588 unsigned int i, size;
589 char *attr_name;
590
591 if (!capable(CAP_SYS_ADMIN))
592 return -XFS_ERROR(EPERM);
593 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
594 return -XFS_ERROR(EFAULT);
595
596 error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &vp, &inode);
597 if (error)
598 goto out;
599
600 error = E2BIG;
601 size = am_hreq.opcount * sizeof(attr_multiop_t);
602 if (!size || size > 16 * PAGE_SIZE)
603 goto out_vn_rele;
604
605 error = ENOMEM;
606 ops = kmalloc(size, GFP_KERNEL);
607 if (!ops)
608 goto out_vn_rele;
609
610 error = EFAULT;
611 if (copy_from_user(ops, am_hreq.ops, size))
612 goto out_kfree_ops;
613
614 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
615 if (!attr_name)
616 goto out_kfree_ops;
617
618
619 error = 0;
620 for (i = 0; i < am_hreq.opcount; i++) {
621 ops[i].am_error = strncpy_from_user(attr_name,
622 ops[i].am_attrname, MAXNAMELEN);
623 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
624 error = -ERANGE;
625 if (ops[i].am_error < 0)
626 break;
627
628 switch (ops[i].am_opcode) {
629 case ATTR_OP_GET:
630 ops[i].am_error = xfs_attrmulti_attr_get(vp,
631 attr_name, ops[i].am_attrvalue,
632 &ops[i].am_length, ops[i].am_flags);
633 break;
634 case ATTR_OP_SET:
635 ops[i].am_error = xfs_attrmulti_attr_set(vp,
636 attr_name, ops[i].am_attrvalue,
637 ops[i].am_length, ops[i].am_flags);
638 break;
639 case ATTR_OP_REMOVE:
640 ops[i].am_error = xfs_attrmulti_attr_remove(vp,
641 attr_name, ops[i].am_flags);
642 break;
643 default:
644 ops[i].am_error = EINVAL;
645 }
646 }
647
648 if (copy_to_user(am_hreq.ops, ops, size))
649 error = XFS_ERROR(EFAULT);
650
651 kfree(attr_name);
652 out_kfree_ops:
653 kfree(ops);
654 out_vn_rele:
655 VN_RELE(vp);
656 out:
657 return -error;
658}
659
660/* prototypes for a few of the stack-hungry cases that have
661 * their own functions. Functions are defined after their use
662 * so gcc doesn't get fancy and inline them with -03 */
663
664STATIC int
665xfs_ioc_space(
666 bhv_desc_t *bdp,
667 vnode_t *vp,
668 struct file *filp,
669 int flags,
670 unsigned int cmd,
671 void __user *arg);
672
673STATIC int
674xfs_ioc_bulkstat(
675 xfs_mount_t *mp,
676 unsigned int cmd,
677 void __user *arg);
678
679STATIC int
680xfs_ioc_fsgeometry_v1(
681 xfs_mount_t *mp,
682 void __user *arg);
683
684STATIC int
685xfs_ioc_fsgeometry(
686 xfs_mount_t *mp,
687 void __user *arg);
688
689STATIC int
690xfs_ioc_xattr(
691 vnode_t *vp,
692 xfs_inode_t *ip,
693 struct file *filp,
694 unsigned int cmd,
695 void __user *arg);
696
697STATIC int
698xfs_ioc_getbmap(
699 bhv_desc_t *bdp,
700 struct file *filp,
701 int flags,
702 unsigned int cmd,
703 void __user *arg);
704
705STATIC int
706xfs_ioc_getbmapx(
707 bhv_desc_t *bdp,
708 void __user *arg);
709
710int
711xfs_ioctl(
712 bhv_desc_t *bdp,
713 struct inode *inode,
714 struct file *filp,
715 int ioflags,
716 unsigned int cmd,
717 void __user *arg)
718{
719 int error;
720 vnode_t *vp;
721 xfs_inode_t *ip;
722 xfs_mount_t *mp;
723
724 vp = LINVFS_GET_VP(inode);
725
726 vn_trace_entry(vp, "xfs_ioctl", (inst_t *)__return_address);
727
728 ip = XFS_BHVTOI(bdp);
729 mp = ip->i_mount;
730
731 switch (cmd) {
732
733 case XFS_IOC_ALLOCSP:
734 case XFS_IOC_FREESP:
735 case XFS_IOC_RESVSP:
736 case XFS_IOC_UNRESVSP:
737 case XFS_IOC_ALLOCSP64:
738 case XFS_IOC_FREESP64:
739 case XFS_IOC_RESVSP64:
740 case XFS_IOC_UNRESVSP64:
741 /*
742 * Only allow the sys admin to reserve space unless
743 * unwritten extents are enabled.
744 */
745 if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) &&
746 !capable(CAP_SYS_ADMIN))
747 return -EPERM;
748
749 return xfs_ioc_space(bdp, vp, filp, ioflags, cmd, arg);
750
751 case XFS_IOC_DIOINFO: {
752 struct dioattr da;
753 xfs_buftarg_t *target =
754 (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
755 mp->m_rtdev_targp : mp->m_ddev_targp;
756
757 da.d_mem = da.d_miniosz = 1 << target->pbr_sshift;
758 /* The size dio will do in one go */
759 da.d_maxiosz = 64 * PAGE_CACHE_SIZE;
760
761 if (copy_to_user(arg, &da, sizeof(da)))
762 return -XFS_ERROR(EFAULT);
763 return 0;
764 }
765
766 case XFS_IOC_FSBULKSTAT_SINGLE:
767 case XFS_IOC_FSBULKSTAT:
768 case XFS_IOC_FSINUMBERS:
769 return xfs_ioc_bulkstat(mp, cmd, arg);
770
771 case XFS_IOC_FSGEOMETRY_V1:
772 return xfs_ioc_fsgeometry_v1(mp, arg);
773
774 case XFS_IOC_FSGEOMETRY:
775 return xfs_ioc_fsgeometry(mp, arg);
776
777 case XFS_IOC_GETVERSION:
778 case XFS_IOC_GETXFLAGS:
779 case XFS_IOC_SETXFLAGS:
b74e2159
NS		 780 case XFS_IOC_GETPROJID:
781 case XFS_IOC_SETPROJID:
1da177e4
LT		 782 case XFS_IOC_FSGETXATTR:
783 case XFS_IOC_FSSETXATTR:
784 case XFS_IOC_FSGETXATTRA:
785 return xfs_ioc_xattr(vp, ip, filp, cmd, arg);
786
787 case XFS_IOC_FSSETDM: {
788 struct fsdmidata dmi;
789
790 if (copy_from_user(&dmi, arg, sizeof(dmi)))
791 return -XFS_ERROR(EFAULT);
792
793 error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate,
794 NULL);
795 return -error;
796 }
797
798 case XFS_IOC_GETBMAP:
799 case XFS_IOC_GETBMAPA:
800 return xfs_ioc_getbmap(bdp, filp, ioflags, cmd, arg);
801
802 case XFS_IOC_GETBMAPX:
803 return xfs_ioc_getbmapx(bdp, arg);
804
805 case XFS_IOC_FD_TO_HANDLE:
806 case XFS_IOC_PATH_TO_HANDLE:
807 case XFS_IOC_PATH_TO_FSHANDLE:
808 return xfs_find_handle(cmd, arg);
809
810 case XFS_IOC_OPEN_BY_HANDLE:
811 return xfs_open_by_handle(mp, arg, filp, inode);
812
813 case XFS_IOC_FSSETDM_BY_HANDLE:
814 return xfs_fssetdm_by_handle(mp, arg, filp, inode);
815
816 case XFS_IOC_READLINK_BY_HANDLE:
817 return xfs_readlink_by_handle(mp, arg, filp, inode);
818
819 case XFS_IOC_ATTRLIST_BY_HANDLE:
820 return xfs_attrlist_by_handle(mp, arg, filp, inode);
821
822 case XFS_IOC_ATTRMULTI_BY_HANDLE:
823 return xfs_attrmulti_by_handle(mp, arg, filp, inode);
824
825 case XFS_IOC_SWAPEXT: {
826 error = xfs_swapext((struct xfs_swapext __user *)arg);
827 return -error;
828 }
829
830 case XFS_IOC_FSCOUNTS: {
831 xfs_fsop_counts_t out;
832
833 error = xfs_fs_counts(mp, &out);
834 if (error)
835 return -error;
836
837 if (copy_to_user(arg, &out, sizeof(out)))
838 return -XFS_ERROR(EFAULT);
839 return 0;
840 }
841
842 case XFS_IOC_SET_RESBLKS: {
843 xfs_fsop_resblks_t inout;
844 __uint64_t in;
845
846 if (!capable(CAP_SYS_ADMIN))
847 return -EPERM;
848
849 if (copy_from_user(&inout, arg, sizeof(inout)))
850 return -XFS_ERROR(EFAULT);
851
852 /* input parameter is passed in resblks field of structure */
853 in = inout.resblks;
854 error = xfs_reserve_blocks(mp, &in, &inout);
855 if (error)
856 return -error;
857
858 if (copy_to_user(arg, &inout, sizeof(inout)))
859 return -XFS_ERROR(EFAULT);
860 return 0;
861 }
862
863 case XFS_IOC_GET_RESBLKS: {
864 xfs_fsop_resblks_t out;
865
866 if (!capable(CAP_SYS_ADMIN))
867 return -EPERM;
868
869 error = xfs_reserve_blocks(mp, NULL, &out);
870 if (error)
871 return -error;
872
873 if (copy_to_user(arg, &out, sizeof(out)))
874 return -XFS_ERROR(EFAULT);
875
876 return 0;
877 }
878
879 case XFS_IOC_FSGROWFSDATA: {
880 xfs_growfs_data_t in;
881
882 if (!capable(CAP_SYS_ADMIN))
883 return -EPERM;
884
885 if (copy_from_user(&in, arg, sizeof(in)))
886 return -XFS_ERROR(EFAULT);
887
888 error = xfs_growfs_data(mp, &in);
889 return -error;
890 }
891
892 case XFS_IOC_FSGROWFSLOG: {
893 xfs_growfs_log_t in;
894
895 if (!capable(CAP_SYS_ADMIN))
896 return -EPERM;
897
898 if (copy_from_user(&in, arg, sizeof(in)))
899 return -XFS_ERROR(EFAULT);
900
901 error = xfs_growfs_log(mp, &in);
902 return -error;
903 }
904
905 case XFS_IOC_FSGROWFSRT: {
906 xfs_growfs_rt_t in;
907
908 if (!capable(CAP_SYS_ADMIN))
909 return -EPERM;
910
911 if (copy_from_user(&in, arg, sizeof(in)))
912 return -XFS_ERROR(EFAULT);
913
914 error = xfs_growfs_rt(mp, &in);
915 return -error;
916 }
917
918 case XFS_IOC_FREEZE:
919 if (!capable(CAP_SYS_ADMIN))
920 return -EPERM;
921
922 if (inode->i_sb->s_frozen == SB_UNFROZEN)
923 freeze_bdev(inode->i_sb->s_bdev);
924 return 0;
925
926 case XFS_IOC_THAW:
927 if (!capable(CAP_SYS_ADMIN))
928 return -EPERM;
929 if (inode->i_sb->s_frozen != SB_UNFROZEN)
930 thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);
931 return 0;
932
933 case XFS_IOC_GOINGDOWN: {
934 __uint32_t in;
935
936 if (!capable(CAP_SYS_ADMIN))
937 return -EPERM;
938
939 if (get_user(in, (__uint32_t __user *)arg))
940 return -XFS_ERROR(EFAULT);
941
942 error = xfs_fs_goingdown(mp, in);
943 return -error;
944 }
945
946 case XFS_IOC_ERROR_INJECTION: {
947 xfs_error_injection_t in;
948
949 if (!capable(CAP_SYS_ADMIN))
950 return -EPERM;
951
952 if (copy_from_user(&in, arg, sizeof(in)))
953 return -XFS_ERROR(EFAULT);
954
955 error = xfs_errortag_add(in.errtag, mp);
956 return -error;
957 }
958
959 case XFS_IOC_ERROR_CLEARALL:
960 if (!capable(CAP_SYS_ADMIN))
961 return -EPERM;
962
963 error = xfs_errortag_clearall(mp);
964 return -error;
965
966 default:
967 return -ENOTTY;
968 }
969}
970
971STATIC int
972xfs_ioc_space(
973 bhv_desc_t *bdp,
974 vnode_t *vp,
975 struct file *filp,
976 int ioflags,
977 unsigned int cmd,
978 void __user *arg)
979{
980 xfs_flock64_t bf;
981 int attr_flags = 0;
982 int error;
983
984 if (vp->v_inode.i_flags & (S_IMMUTABLE|S_APPEND))
985 return -XFS_ERROR(EPERM);
986
987 if (!(filp->f_flags & FMODE_WRITE))
988 return -XFS_ERROR(EBADF);
989
990 if (vp->v_type != VREG)
991 return -XFS_ERROR(EINVAL);
992
993 if (copy_from_user(&bf, arg, sizeof(bf)))
994 return -XFS_ERROR(EFAULT);
995
996 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
997 attr_flags |= ATTR_NONBLOCK;
998 if (ioflags & IO_INVIS)
999 attr_flags |= ATTR_DMI;
1000
1001 error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos,
1002 NULL, attr_flags);
1003 return -error;
1004}
1005
1006STATIC int
1007xfs_ioc_bulkstat(
1008 xfs_mount_t *mp,
1009 unsigned int cmd,
1010 void __user *arg)
1011{
1012 xfs_fsop_bulkreq_t bulkreq;
1013 int count; /* # of records returned */
1014 xfs_ino_t inlast; /* last inode number */
1015 int done;
1016 int error;
1017
1018 /* done = 1 if there are more stats to get and if bulkstat */
1019 /* should be called again (unused here, but used in dmapi) */
1020
1021 if (!capable(CAP_SYS_ADMIN))
1022 return -EPERM;
1023
1024 if (XFS_FORCED_SHUTDOWN(mp))
1025 return -XFS_ERROR(EIO);
1026
1027 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
1028 return -XFS_ERROR(EFAULT);
1029
1030 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
1031 return -XFS_ERROR(EFAULT);
1032
1033 if ((count = bulkreq.icount) <= 0)
1034 return -XFS_ERROR(EINVAL);
1035
1036 if (cmd == XFS_IOC_FSINUMBERS)
1037 error = xfs_inumbers(mp, &inlast, &count,
1038 bulkreq.ubuffer);
1039 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
1040 error = xfs_bulkstat_single(mp, &inlast,
1041 bulkreq.ubuffer, &done);
1042 else { /* XFS_IOC_FSBULKSTAT */
1043 if (count == 1 && inlast != 0) {
1044 inlast++;
1045 error = xfs_bulkstat_single(mp, &inlast,
1046 bulkreq.ubuffer, &done);
1047 } else {
1048 error = xfs_bulkstat(mp, &inlast, &count,
1049 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
1050 sizeof(xfs_bstat_t), bulkreq.ubuffer,
1051 BULKSTAT_FG_QUICK, &done);
1052 }
1053 }
1054
1055 if (error)
1056 return -error;
1057
1058 if (bulkreq.ocount != NULL) {
1059 if (copy_to_user(bulkreq.lastip, &inlast,
1060 sizeof(xfs_ino_t)))
1061 return -XFS_ERROR(EFAULT);
1062
1063 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
1064 return -XFS_ERROR(EFAULT);
1065 }
1066
1067 return 0;
1068}
1069
1070STATIC int
1071xfs_ioc_fsgeometry_v1(
1072 xfs_mount_t *mp,
1073 void __user *arg)
1074{
1075 xfs_fsop_geom_v1_t fsgeo;
1076 int error;
1077
1078 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
1079 if (error)
1080 return -error;
1081
1082 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
1083 return -XFS_ERROR(EFAULT);
1084 return 0;
1085}
1086
1087STATIC int
1088xfs_ioc_fsgeometry(
1089 xfs_mount_t *mp,
1090 void __user *arg)
1091{
1092 xfs_fsop_geom_t fsgeo;
1093 int error;
1094
1095 error = xfs_fs_geometry(mp, &fsgeo, 4);
1096 if (error)
1097 return -error;
1098
1099 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
1100 return -XFS_ERROR(EFAULT);
1101 return 0;
1102}
1103
1104/*
1105 * Linux extended inode flags interface.
1106 */
1107#define LINUX_XFLAG_SYNC 0x00000008 /* Synchronous updates */
1108#define LINUX_XFLAG_IMMUTABLE 0x00000010 /* Immutable file */
1109#define LINUX_XFLAG_APPEND 0x00000020 /* writes to file may only append */
1110#define LINUX_XFLAG_NODUMP 0x00000040 /* do not dump file */
1111#define LINUX_XFLAG_NOATIME 0x00000080 /* do not update atime */
1112
1113STATIC unsigned int
1114xfs_merge_ioc_xflags(
1115 unsigned int flags,
1116 unsigned int start)
1117{
1118 unsigned int xflags = start;
1119
1120 if (flags & LINUX_XFLAG_IMMUTABLE)
1121 xflags |= XFS_XFLAG_IMMUTABLE;
1122 else
1123 xflags &= ~XFS_XFLAG_IMMUTABLE;
1124 if (flags & LINUX_XFLAG_APPEND)
1125 xflags |= XFS_XFLAG_APPEND;
1126 else
1127 xflags &= ~XFS_XFLAG_APPEND;
1128 if (flags & LINUX_XFLAG_SYNC)
1129 xflags |= XFS_XFLAG_SYNC;
1130 else
1131 xflags &= ~XFS_XFLAG_SYNC;
1132 if (flags & LINUX_XFLAG_NOATIME)
1133 xflags |= XFS_XFLAG_NOATIME;
1134 else
1135 xflags &= ~XFS_XFLAG_NOATIME;
1136 if (flags & LINUX_XFLAG_NODUMP)
1137 xflags |= XFS_XFLAG_NODUMP;
1138 else
1139 xflags &= ~XFS_XFLAG_NODUMP;
1140
1141 return xflags;
1142}
1143
1144STATIC unsigned int
1145xfs_di2lxflags(
1146 __uint16_t di_flags)
1147{
1148 unsigned int flags = 0;
1149
1150 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1151 flags |= LINUX_XFLAG_IMMUTABLE;
1152 if (di_flags & XFS_DIFLAG_APPEND)
1153 flags |= LINUX_XFLAG_APPEND;
1154 if (di_flags & XFS_DIFLAG_SYNC)
1155 flags |= LINUX_XFLAG_SYNC;
1156 if (di_flags & XFS_DIFLAG_NOATIME)
1157 flags |= LINUX_XFLAG_NOATIME;
1158 if (di_flags & XFS_DIFLAG_NODUMP)
1159 flags |= LINUX_XFLAG_NODUMP;
1160 return flags;
1161}
1162
1163STATIC int
1164xfs_ioc_xattr(
1165 vnode_t *vp,
1166 xfs_inode_t *ip,
1167 struct file *filp,
1168 unsigned int cmd,
1169 void __user *arg)
1170{
1171 struct fsxattr fa;
1172 vattr_t va;
1173 int error;
1174 int attr_flags;
1175 unsigned int flags;
1176
1177 switch (cmd) {
1178 case XFS_IOC_FSGETXATTR: {
1179 va.va_mask = XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS;
1180 VOP_GETATTR(vp, &va, 0, NULL, error);
1181 if (error)
1182 return -error;
1183
1184 fa.fsx_xflags = va.va_xflags;
1185 fa.fsx_extsize = va.va_extsize;
1186 fa.fsx_nextents = va.va_nextents;
1187
1188 if (copy_to_user(arg, &fa, sizeof(fa)))
1189 return -XFS_ERROR(EFAULT);
1190 return 0;
1191 }
1192
1193 case XFS_IOC_FSSETXATTR: {
1194 if (copy_from_user(&fa, arg, sizeof(fa)))
1195 return -XFS_ERROR(EFAULT);
1196
1197 attr_flags = 0;
1198 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1199 attr_flags |= ATTR_NONBLOCK;
1200
1201 va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE;
1202 va.va_xflags = fa.fsx_xflags;
1203 va.va_extsize = fa.fsx_extsize;
1204
1205 VOP_SETATTR(vp, &va, attr_flags, NULL, error);
1206 if (!error)
1207 vn_revalidate(vp); /* update Linux inode flags */
1208 return -error;
1209 }
1210
1211 case XFS_IOC_FSGETXATTRA: {
1212 va.va_mask = XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_ANEXTENTS;
1213 VOP_GETATTR(vp, &va, 0, NULL, error);
1214 if (error)
1215 return -error;
1216
1217 fa.fsx_xflags = va.va_xflags;
1218 fa.fsx_extsize = va.va_extsize;
1219 fa.fsx_nextents = va.va_anextents;
1220
1221 if (copy_to_user(arg, &fa, sizeof(fa)))
1222 return -XFS_ERROR(EFAULT);
1223 return 0;
1224 }
1225
1226 case XFS_IOC_GETXFLAGS: {
1227 flags = xfs_di2lxflags(ip->i_d.di_flags);
1228 if (copy_to_user(arg, &flags, sizeof(flags)))
1229 return -XFS_ERROR(EFAULT);
1230 return 0;
1231 }
1232
1233 case XFS_IOC_SETXFLAGS: {
1234 if (copy_from_user(&flags, arg, sizeof(flags)))
1235 return -XFS_ERROR(EFAULT);
1236
1237 if (flags & ~(LINUX_XFLAG_IMMUTABLE | LINUX_XFLAG_APPEND | \
1238 LINUX_XFLAG_NOATIME | LINUX_XFLAG_NODUMP | \
1239 LINUX_XFLAG_SYNC))
1240 return -XFS_ERROR(EOPNOTSUPP);
1241
1242 attr_flags = 0;
1243 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1244 attr_flags |= ATTR_NONBLOCK;
1245
1246 va.va_mask = XFS_AT_XFLAGS;
1247 va.va_xflags = xfs_merge_ioc_xflags(flags,
1248 xfs_ip2xflags(ip));
1249
1250 VOP_SETATTR(vp, &va, attr_flags, NULL, error);
1251 if (!error)
1252 vn_revalidate(vp); /* update Linux inode flags */
1253 return -error;
1254 }
1255
1256 case XFS_IOC_GETVERSION: {
1257 flags = LINVFS_GET_IP(vp)->i_generation;
1258 if (copy_to_user(arg, &flags, sizeof(flags)))
1259 return -XFS_ERROR(EFAULT);
1260 return 0;
1261 }
1262
b74e2159
NS		 1263 case XFS_IOC_GETPROJID: {
1264 va.va_mask = XFS_AT_PROJID;
1265 VOP_GETATTR(vp, &va, 0, NULL, error);
1266 if (error)
1267 return -error;
1268 if (copy_to_user(arg, &va.va_projid, sizeof(va.va_projid)))
1269 return -XFS_ERROR(EFAULT);
1270 return 0;
1271 }
1272
1273 case XFS_IOC_SETPROJID: {
1274 if (!capable(CAP_SYS_ADMIN))
1275 return -EPERM;
1276 va.va_mask = XFS_AT_PROJID;
1277 if (copy_from_user(&va.va_projid, arg, sizeof(va.va_projid)))
1278 return -XFS_ERROR(EFAULT);
1279 VOP_SETATTR(vp, &va, 0, NULL, error);
1280 return -error;
1281 }
1282
1da177e4
LT		 1283 default:
1284 return -ENOTTY;
1285 }
1286}
1287
1288STATIC int
1289xfs_ioc_getbmap(
1290 bhv_desc_t *bdp,
1291 struct file *filp,
1292 int ioflags,
1293 unsigned int cmd,
1294 void __user *arg)
1295{
1296 struct getbmap bm;
1297 int iflags;
1298 int error;
1299
1300 if (copy_from_user(&bm, arg, sizeof(bm)))
1301 return -XFS_ERROR(EFAULT);
1302
1303 if (bm.bmv_count < 2)
1304 return -XFS_ERROR(EINVAL);
1305
1306 iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1307 if (ioflags & IO_INVIS)
1308 iflags |= BMV_IF_NO_DMAPI_READ;
1309
1310 error = xfs_getbmap(bdp, &bm, (struct getbmap __user *)arg+1, iflags);
1311 if (error)
1312 return -error;
1313
1314 if (copy_to_user(arg, &bm, sizeof(bm)))
1315 return -XFS_ERROR(EFAULT);
1316 return 0;
1317}
1318
1319STATIC int
1320xfs_ioc_getbmapx(
1321 bhv_desc_t *bdp,
1322 void __user *arg)
1323{
1324 struct getbmapx bmx;
1325 struct getbmap bm;
1326 int iflags;
1327 int error;
1328
1329 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1330 return -XFS_ERROR(EFAULT);
1331
1332 if (bmx.bmv_count < 2)
1333 return -XFS_ERROR(EINVAL);
1334
1335 /*
1336 * Map input getbmapx structure to a getbmap
1337 * structure for xfs_getbmap.
1338 */
1339 GETBMAP_CONVERT(bmx, bm);
1340
1341 iflags = bmx.bmv_iflags;
1342
1343 if (iflags & (~BMV_IF_VALID))
1344 return -XFS_ERROR(EINVAL);
1345
1346 iflags |= BMV_IF_EXTENDED;
1347
1348 error = xfs_getbmap(bdp, &bm, (struct getbmapx __user *)arg+1, iflags);
1349 if (error)
1350 return -error;
1351
1352 GETBMAP_CONVERT(bm, bmx);
1353
1354 if (copy_to_user(arg, &bmx, sizeof(bmx)))
1355 return -XFS_ERROR(EFAULT);
1356
1357 return 0;
1358}
Linux 6.x block layer and io_uring tree(s)