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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
blob69809eef8a54b0999489ff3ef250c996596a32dc
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 */
86 STATIC int
87 xfs_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 */
201 STATIC int
202 xfs_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
278 STATIC int
279 xfs_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
364 STATIC int
365 xfs_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
413 STATIC int
414 xfs_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
455 STATIC int
456 xfs_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
502 STATIC int
503 xfs_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
531 STATIC int
532 xfs_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
561 STATIC int
562 xfs_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
576 STATIC int
577 xfs_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
664 STATIC int
665 xfs_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
673 STATIC int
674 xfs_ioc_bulkstat(
675 xfs_mount_t *mp,
676 unsigned int cmd,
677 void __user *arg);
678
679 STATIC int
680 xfs_ioc_fsgeometry_v1(
681 xfs_mount_t *mp,
682 void __user *arg);
683
684 STATIC int
685 xfs_ioc_fsgeometry(
686 xfs_mount_t *mp,
687 void __user *arg);
688
689 STATIC int
690 xfs_ioc_xattr(
691 vnode_t *vp,
692 xfs_inode_t *ip,
693 struct file *filp,
694 unsigned int cmd,
695 void __user *arg);
696
697 STATIC int
698 xfs_ioc_getbmap(
699 bhv_desc_t *bdp,
700 struct file *filp,
701 int flags,
702 unsigned int cmd,
703 void __user *arg);
704
705 STATIC int
706 xfs_ioc_getbmapx(
707 bhv_desc_t *bdp,
708 void __user *arg);
709
710 int
711 xfs_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:
780 case XFS_IOC_FSGETXATTR:
781 case XFS_IOC_FSSETXATTR:
782 case XFS_IOC_FSGETXATTRA:
783 return xfs_ioc_xattr(vp, ip, filp, cmd, arg);
784
785 case XFS_IOC_FSSETDM: {
786 struct fsdmidata dmi;
787
788 if (copy_from_user(&dmi, arg, sizeof(dmi)))
789 return -XFS_ERROR(EFAULT);
790
791 error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate,
792 NULL);
793 return -error;
794 }
795
796 case XFS_IOC_GETBMAP:
797 case XFS_IOC_GETBMAPA:
798 return xfs_ioc_getbmap(bdp, filp, ioflags, cmd, arg);
799
800 case XFS_IOC_GETBMAPX:
801 return xfs_ioc_getbmapx(bdp, arg);
802
803 case XFS_IOC_FD_TO_HANDLE:
804 case XFS_IOC_PATH_TO_HANDLE:
805 case XFS_IOC_PATH_TO_FSHANDLE:
806 return xfs_find_handle(cmd, arg);
807
808 case XFS_IOC_OPEN_BY_HANDLE:
809 return xfs_open_by_handle(mp, arg, filp, inode);
810
811 case XFS_IOC_FSSETDM_BY_HANDLE:
812 return xfs_fssetdm_by_handle(mp, arg, filp, inode);
813
814 case XFS_IOC_READLINK_BY_HANDLE:
815 return xfs_readlink_by_handle(mp, arg, filp, inode);
816
817 case XFS_IOC_ATTRLIST_BY_HANDLE:
818 return xfs_attrlist_by_handle(mp, arg, filp, inode);
819
820 case XFS_IOC_ATTRMULTI_BY_HANDLE:
821 return xfs_attrmulti_by_handle(mp, arg, filp, inode);
822
823 case XFS_IOC_SWAPEXT: {
824 error = xfs_swapext((struct xfs_swapext __user *)arg);
825 return -error;
826 }
827
828 case XFS_IOC_FSCOUNTS: {
829 xfs_fsop_counts_t out;
830
831 error = xfs_fs_counts(mp, &out);
832 if (error)
833 return -error;
834
835 if (copy_to_user(arg, &out, sizeof(out)))
836 return -XFS_ERROR(EFAULT);
837 return 0;
838 }
839
840 case XFS_IOC_SET_RESBLKS: {
841 xfs_fsop_resblks_t inout;
842 __uint64_t in;
843
844 if (!capable(CAP_SYS_ADMIN))
845 return -EPERM;
846
847 if (copy_from_user(&inout, arg, sizeof(inout)))
848 return -XFS_ERROR(EFAULT);
849
850 /* input parameter is passed in resblks field of structure */
851 in = inout.resblks;
852 error = xfs_reserve_blocks(mp, &in, &inout);
853 if (error)
854 return -error;
855
856 if (copy_to_user(arg, &inout, sizeof(inout)))
857 return -XFS_ERROR(EFAULT);
858 return 0;
859 }
860
861 case XFS_IOC_GET_RESBLKS: {
862 xfs_fsop_resblks_t out;
863
864 if (!capable(CAP_SYS_ADMIN))
865 return -EPERM;
866
867 error = xfs_reserve_blocks(mp, NULL, &out);
868 if (error)
869 return -error;
870
871 if (copy_to_user(arg, &out, sizeof(out)))
872 return -XFS_ERROR(EFAULT);
873
874 return 0;
875 }
876
877 case XFS_IOC_FSGROWFSDATA: {
878 xfs_growfs_data_t in;
879
880 if (!capable(CAP_SYS_ADMIN))
881 return -EPERM;
882
883 if (copy_from_user(&in, arg, sizeof(in)))
884 return -XFS_ERROR(EFAULT);
885
886 error = xfs_growfs_data(mp, &in);
887 return -error;
888 }
889
890 case XFS_IOC_FSGROWFSLOG: {
891 xfs_growfs_log_t in;
892
893 if (!capable(CAP_SYS_ADMIN))
894 return -EPERM;
895
896 if (copy_from_user(&in, arg, sizeof(in)))
897 return -XFS_ERROR(EFAULT);
898
899 error = xfs_growfs_log(mp, &in);
900 return -error;
901 }
902
903 case XFS_IOC_FSGROWFSRT: {
904 xfs_growfs_rt_t in;
905
906 if (!capable(CAP_SYS_ADMIN))
907 return -EPERM;
908
909 if (copy_from_user(&in, arg, sizeof(in)))
910 return -XFS_ERROR(EFAULT);
911
912 error = xfs_growfs_rt(mp, &in);
913 return -error;
914 }
915
916 case XFS_IOC_FREEZE:
917 if (!capable(CAP_SYS_ADMIN))
918 return -EPERM;
919
920 if (inode->i_sb->s_frozen == SB_UNFROZEN)
921 freeze_bdev(inode->i_sb->s_bdev);
922 return 0;
923
924 case XFS_IOC_THAW:
925 if (!capable(CAP_SYS_ADMIN))
926 return -EPERM;
927 if (inode->i_sb->s_frozen != SB_UNFROZEN)
928 thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);
929 return 0;
930
931 case XFS_IOC_GOINGDOWN: {
932 __uint32_t in;
933
934 if (!capable(CAP_SYS_ADMIN))
935 return -EPERM;
936
937 if (get_user(in, (__uint32_t __user *)arg))
938 return -XFS_ERROR(EFAULT);
939
940 error = xfs_fs_goingdown(mp, in);
941 return -error;
942 }
943
944 case XFS_IOC_ERROR_INJECTION: {
945 xfs_error_injection_t in;
946
947 if (!capable(CAP_SYS_ADMIN))
948 return -EPERM;
949
950 if (copy_from_user(&in, arg, sizeof(in)))
951 return -XFS_ERROR(EFAULT);
952
953 error = xfs_errortag_add(in.errtag, mp);
954 return -error;
955 }
956
957 case XFS_IOC_ERROR_CLEARALL:
958 if (!capable(CAP_SYS_ADMIN))
959 return -EPERM;
960
961 error = xfs_errortag_clearall(mp);
962 return -error;
963
964 default:
965 return -ENOTTY;
966 }
967 }
968
969 STATIC int
970 xfs_ioc_space(
971 bhv_desc_t *bdp,
972 vnode_t *vp,
973 struct file *filp,
974 int ioflags,
975 unsigned int cmd,
976 void __user *arg)
977 {
978 xfs_flock64_t bf;
979 int attr_flags = 0;
980 int error;
981
982 if (vp->v_inode.i_flags & (S_IMMUTABLE|S_APPEND))
983 return -XFS_ERROR(EPERM);
984
985 if (!(filp->f_flags & FMODE_WRITE))
986 return -XFS_ERROR(EBADF);
987
988 if (vp->v_type != VREG)
989 return -XFS_ERROR(EINVAL);
990
991 if (copy_from_user(&bf, arg, sizeof(bf)))
992 return -XFS_ERROR(EFAULT);
993
994 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
995 attr_flags |= ATTR_NONBLOCK;
996 if (ioflags & IO_INVIS)
997 attr_flags |= ATTR_DMI;
998
999 error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos,
1000 NULL, attr_flags);
1001 return -error;
1002 }
1003
1004 STATIC int
1005 xfs_ioc_bulkstat(
1006 xfs_mount_t *mp,
1007 unsigned int cmd,
1008 void __user *arg)
1009 {
1010 xfs_fsop_bulkreq_t bulkreq;
1011 int count; /* # of records returned */
1012 xfs_ino_t inlast; /* last inode number */
1013 int done;
1014 int error;
1015
1016 /* done = 1 if there are more stats to get and if bulkstat */
1017 /* should be called again (unused here, but used in dmapi) */
1018
1019 if (!capable(CAP_SYS_ADMIN))
1020 return -EPERM;
1021
1022 if (XFS_FORCED_SHUTDOWN(mp))
1023 return -XFS_ERROR(EIO);
1024
1025 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
1026 return -XFS_ERROR(EFAULT);
1027
1028 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
1029 return -XFS_ERROR(EFAULT);
1030
1031 if ((count = bulkreq.icount) <= 0)
1032 return -XFS_ERROR(EINVAL);
1033
1034 if (cmd == XFS_IOC_FSINUMBERS)
1035 error = xfs_inumbers(mp, &inlast, &count,
1036 bulkreq.ubuffer);
1037 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
1038 error = xfs_bulkstat_single(mp, &inlast,
1039 bulkreq.ubuffer, &done);
1040 else { /* XFS_IOC_FSBULKSTAT */
1041 if (count == 1 && inlast != 0) {
1042 inlast++;
1043 error = xfs_bulkstat_single(mp, &inlast,
1044 bulkreq.ubuffer, &done);
1045 } else {
1046 error = xfs_bulkstat(mp, &inlast, &count,
1047 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
1048 sizeof(xfs_bstat_t), bulkreq.ubuffer,
1049 BULKSTAT_FG_QUICK, &done);
1050 }
1051 }
1052
1053 if (error)
1054 return -error;
1055
1056 if (bulkreq.ocount != NULL) {
1057 if (copy_to_user(bulkreq.lastip, &inlast,
1058 sizeof(xfs_ino_t)))
1059 return -XFS_ERROR(EFAULT);
1060
1061 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
1062 return -XFS_ERROR(EFAULT);
1063 }
1064
1065 return 0;
1066 }
1067
1068 STATIC int
1069 xfs_ioc_fsgeometry_v1(
1070 xfs_mount_t *mp,
1071 void __user *arg)
1072 {
1073 xfs_fsop_geom_v1_t fsgeo;
1074 int error;
1075
1076 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
1077 if (error)
1078 return -error;
1079
1080 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
1081 return -XFS_ERROR(EFAULT);
1082 return 0;
1083 }
1084
1085 STATIC int
1086 xfs_ioc_fsgeometry(
1087 xfs_mount_t *mp,
1088 void __user *arg)
1089 {
1090 xfs_fsop_geom_t fsgeo;
1091 int error;
1092
1093 error = xfs_fs_geometry(mp, &fsgeo, 4);
1094 if (error)
1095 return -error;
1096
1097 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
1098 return -XFS_ERROR(EFAULT);
1099 return 0;
1100 }
1101
1102 /*
1103 * Linux extended inode flags interface.
1104 */
1105 #define LINUX_XFLAG_SYNC 0x00000008 /* Synchronous updates */
1106 #define LINUX_XFLAG_IMMUTABLE 0x00000010 /* Immutable file */
1107 #define LINUX_XFLAG_APPEND 0x00000020 /* writes to file may only append */
1108 #define LINUX_XFLAG_NODUMP 0x00000040 /* do not dump file */
1109 #define LINUX_XFLAG_NOATIME 0x00000080 /* do not update atime */
1110
1111 STATIC unsigned int
1112 xfs_merge_ioc_xflags(
1113 unsigned int flags,
1114 unsigned int start)
1115 {
1116 unsigned int xflags = start;
1117
1118 if (flags & LINUX_XFLAG_IMMUTABLE)
1119 xflags |= XFS_XFLAG_IMMUTABLE;
1120 else
1121 xflags &= ~XFS_XFLAG_IMMUTABLE;
1122 if (flags & LINUX_XFLAG_APPEND)
1123 xflags |= XFS_XFLAG_APPEND;
1124 else
1125 xflags &= ~XFS_XFLAG_APPEND;
1126 if (flags & LINUX_XFLAG_SYNC)
1127 xflags |= XFS_XFLAG_SYNC;
1128 else
1129 xflags &= ~XFS_XFLAG_SYNC;
1130 if (flags & LINUX_XFLAG_NOATIME)
1131 xflags |= XFS_XFLAG_NOATIME;
1132 else
1133 xflags &= ~XFS_XFLAG_NOATIME;
1134 if (flags & LINUX_XFLAG_NODUMP)
1135 xflags |= XFS_XFLAG_NODUMP;
1136 else
1137 xflags &= ~XFS_XFLAG_NODUMP;
1138
1139 return xflags;
1140 }
1141
1142 STATIC unsigned int
1143 xfs_di2lxflags(
1144 __uint16_t di_flags)
1145 {
1146 unsigned int flags = 0;
1147
1148 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1149 flags |= LINUX_XFLAG_IMMUTABLE;
1150 if (di_flags & XFS_DIFLAG_APPEND)
1151 flags |= LINUX_XFLAG_APPEND;
1152 if (di_flags & XFS_DIFLAG_SYNC)
1153 flags |= LINUX_XFLAG_SYNC;
1154 if (di_flags & XFS_DIFLAG_NOATIME)
1155 flags |= LINUX_XFLAG_NOATIME;
1156 if (di_flags & XFS_DIFLAG_NODUMP)
1157 flags |= LINUX_XFLAG_NODUMP;
1158 return flags;
1159 }
1160
1161 STATIC int
1162 xfs_ioc_xattr(
1163 vnode_t *vp,
1164 xfs_inode_t *ip,
1165 struct file *filp,
1166 unsigned int cmd,
1167 void __user *arg)
1168 {
1169 struct fsxattr fa;
1170 vattr_t va;
1171 int error;
1172 int attr_flags;
1173 unsigned int flags;
1174
1175 switch (cmd) {
1176 case XFS_IOC_FSGETXATTR: {
1177 va.va_mask = XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS;
1178 VOP_GETATTR(vp, &va, 0, NULL, error);
1179 if (error)
1180 return -error;
1181
1182 fa.fsx_xflags = va.va_xflags;
1183 fa.fsx_extsize = va.va_extsize;
1184 fa.fsx_nextents = va.va_nextents;
1185
1186 if (copy_to_user(arg, &fa, sizeof(fa)))
1187 return -XFS_ERROR(EFAULT);
1188 return 0;
1189 }
1190
1191 case XFS_IOC_FSSETXATTR: {
1192 if (copy_from_user(&fa, arg, sizeof(fa)))
1193 return -XFS_ERROR(EFAULT);
1194
1195 attr_flags = 0;
1196 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1197 attr_flags |= ATTR_NONBLOCK;
1198
1199 va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE;
1200 va.va_xflags = fa.fsx_xflags;
1201 va.va_extsize = fa.fsx_extsize;
1202
1203 VOP_SETATTR(vp, &va, attr_flags, NULL, error);
1204 if (!error)
1205 vn_revalidate(vp); /* update Linux inode flags */
1206 return -error;
1207 }
1208
1209 case XFS_IOC_FSGETXATTRA: {
1210 va.va_mask = XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_ANEXTENTS;
1211 VOP_GETATTR(vp, &va, 0, NULL, error);
1212 if (error)
1213 return -error;
1214
1215 fa.fsx_xflags = va.va_xflags;
1216 fa.fsx_extsize = va.va_extsize;
1217 fa.fsx_nextents = va.va_anextents;
1218
1219 if (copy_to_user(arg, &fa, sizeof(fa)))
1220 return -XFS_ERROR(EFAULT);
1221 return 0;
1222 }
1223
1224 case XFS_IOC_GETXFLAGS: {
1225 flags = xfs_di2lxflags(ip->i_d.di_flags);
1226 if (copy_to_user(arg, &flags, sizeof(flags)))
1227 return -XFS_ERROR(EFAULT);
1228 return 0;
1229 }
1230
1231 case XFS_IOC_SETXFLAGS: {
1232 if (copy_from_user(&flags, arg, sizeof(flags)))
1233 return -XFS_ERROR(EFAULT);
1234
1235 if (flags & ~(LINUX_XFLAG_IMMUTABLE | LINUX_XFLAG_APPEND | \
1236 LINUX_XFLAG_NOATIME | LINUX_XFLAG_NODUMP | \
1237 LINUX_XFLAG_SYNC))
1238 return -XFS_ERROR(EOPNOTSUPP);
1239
1240 attr_flags = 0;
1241 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1242 attr_flags |= ATTR_NONBLOCK;
1243
1244 va.va_mask = XFS_AT_XFLAGS;
1245 va.va_xflags = xfs_merge_ioc_xflags(flags,
1246 xfs_ip2xflags(ip));
1247
1248 VOP_SETATTR(vp, &va, attr_flags, NULL, error);
1249 if (!error)
1250 vn_revalidate(vp); /* update Linux inode flags */
1251 return -error;
1252 }
1253
1254 case XFS_IOC_GETVERSION: {
1255 flags = LINVFS_GET_IP(vp)->i_generation;
1256 if (copy_to_user(arg, &flags, sizeof(flags)))
1257 return -XFS_ERROR(EFAULT);
1258 return 0;
1259 }
1260
1261 default:
1262 return -ENOTTY;
1263 }
1264 }
1265
1266 STATIC int
1267 xfs_ioc_getbmap(
1268 bhv_desc_t *bdp,
1269 struct file *filp,
1270 int ioflags,
1271 unsigned int cmd,
1272 void __user *arg)
1273 {
1274 struct getbmap bm;
1275 int iflags;
1276 int error;
1277
1278 if (copy_from_user(&bm, arg, sizeof(bm)))
1279 return -XFS_ERROR(EFAULT);
1280
1281 if (bm.bmv_count < 2)
1282 return -XFS_ERROR(EINVAL);
1283
1284 iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1285 if (ioflags & IO_INVIS)
1286 iflags |= BMV_IF_NO_DMAPI_READ;
1287
1288 error = xfs_getbmap(bdp, &bm, (struct getbmap __user *)arg+1, iflags);
1289 if (error)
1290 return -error;
1291
1292 if (copy_to_user(arg, &bm, sizeof(bm)))
1293 return -XFS_ERROR(EFAULT);
1294 return 0;
1295 }
1296
1297 STATIC int
1298 xfs_ioc_getbmapx(
1299 bhv_desc_t *bdp,
1300 void __user *arg)
1301 {
1302 struct getbmapx bmx;
1303 struct getbmap bm;
1304 int iflags;
1305 int error;
1306
1307 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1308 return -XFS_ERROR(EFAULT);
1309
1310 if (bmx.bmv_count < 2)
1311 return -XFS_ERROR(EINVAL);
1312
1313 /*
1314 * Map input getbmapx structure to a getbmap
1315 * structure for xfs_getbmap.
1316 */
1317 GETBMAP_CONVERT(bmx, bm);
1318
1319 iflags = bmx.bmv_iflags;
1320
1321 if (iflags & (~BMV_IF_VALID))
1322 return -XFS_ERROR(EINVAL);
1323
1324 iflags |= BMV_IF_EXTENDED;
1325
1326 error = xfs_getbmap(bdp, &bm, (struct getbmapx __user *)arg+1, iflags);
1327 if (error)
1328 return -error;
1329
1330 GETBMAP_CONVERT(bm, bmx);
1331
1332 if (copy_to_user(arg, &bmx, sizeof(bmx)))
1333 return -XFS_ERROR(EFAULT);
1334
1335 return 0;
1336 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree