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[XFS] Remove xfs_macros.c, xfs_macros.h, rework headers a whole lot.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / xfs / linux-2.6 / xfs_ioctl.c
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 #include "xfs.h"
33 #include "xfs_fs.h"
34 #include "xfs_bit.h"
35 #include "xfs_log.h"
36 #include "xfs_inum.h"
37 #include "xfs_trans.h"
38 #include "xfs_sb.h"
39 #include "xfs_ag.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_bmap_btree.h"
46 #include "xfs_alloc_btree.h"
47 #include "xfs_ialloc_btree.h"
48 #include "xfs_dir_sf.h"
49 #include "xfs_attr_sf.h"
50 #include "xfs_dir2_sf.h"
51 #include "xfs_dinode.h"
52 #include "xfs_inode.h"
53 #include "xfs_btree.h"
54 #include "xfs_ialloc.h"
55 #include "xfs_rtalloc.h"
56 #include "xfs_itable.h"
57 #include "xfs_error.h"
58 #include "xfs_rw.h"
59 #include "xfs_acl.h"
60 #include "xfs_cap.h"
61 #include "xfs_mac.h"
62 #include "xfs_attr.h"
63 #include "xfs_bmap.h"
64 #include "xfs_buf_item.h"
65 #include "xfs_utils.h"
66 #include "xfs_dfrag.h"
67 #include "xfs_fsops.h"
68
69 #include <linux/dcache.h>
70 #include <linux/mount.h>
71 #include <linux/namei.h>
72 #include <linux/pagemap.h>
73
74 /*
75 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
76 * a file or fs handle.
77 *
78 * XFS_IOC_PATH_TO_FSHANDLE
79 * returns fs handle for a mount point or path within that mount point
80 * XFS_IOC_FD_TO_HANDLE
81 * returns full handle for a FD opened in user space
82 * XFS_IOC_PATH_TO_HANDLE
83 * returns full handle for a path
84 */
85 STATIC int
86 xfs_find_handle(
87 unsigned int cmd,
88 void __user *arg)
89 {
90 int hsize;
91 xfs_handle_t handle;
92 xfs_fsop_handlereq_t hreq;
93 struct inode *inode;
94 struct vnode *vp;
95
96 if (copy_from_user(&hreq, arg, sizeof(hreq)))
97 return -XFS_ERROR(EFAULT);
98
99 memset((char *)&handle, 0, sizeof(handle));
100
101 switch (cmd) {
102 case XFS_IOC_PATH_TO_FSHANDLE:
103 case XFS_IOC_PATH_TO_HANDLE: {
104 struct nameidata nd;
105 int error;
106
107 error = user_path_walk_link((const char __user *)hreq.path, &nd);
108 if (error)
109 return error;
110
111 ASSERT(nd.dentry);
112 ASSERT(nd.dentry->d_inode);
113 inode = igrab(nd.dentry->d_inode);
114 path_release(&nd);
115 break;
116 }
117
118 case XFS_IOC_FD_TO_HANDLE: {
119 struct file *file;
120
121 file = fget(hreq.fd);
122 if (!file)
123 return -EBADF;
124
125 ASSERT(file->f_dentry);
126 ASSERT(file->f_dentry->d_inode);
127 inode = igrab(file->f_dentry->d_inode);
128 fput(file);
129 break;
130 }
131
132 default:
133 ASSERT(0);
134 return -XFS_ERROR(EINVAL);
135 }
136
137 if (inode->i_sb->s_magic != XFS_SB_MAGIC) {
138 /* we're not in XFS anymore, Toto */
139 iput(inode);
140 return -XFS_ERROR(EINVAL);
141 }
142
143 switch (inode->i_mode & S_IFMT) {
144 case S_IFREG:
145 case S_IFDIR:
146 case S_IFLNK:
147 break;
148 default:
149 iput(inode);
150 return -XFS_ERROR(EBADF);
151 }
152
153 /* we need the vnode */
154 vp = LINVFS_GET_VP(inode);
155
156 /* now we can grab the fsid */
157 memcpy(&handle.ha_fsid, vp->v_vfsp->vfs_altfsid, sizeof(xfs_fsid_t));
158 hsize = sizeof(xfs_fsid_t);
159
160 if (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
161 xfs_inode_t *ip;
162 bhv_desc_t *bhv;
163 int lock_mode;
164
165 /* need to get access to the xfs_inode to read the generation */
166 bhv = vn_bhv_lookup_unlocked(VN_BHV_HEAD(vp), &xfs_vnodeops);
167 ASSERT(bhv);
168 ip = XFS_BHVTOI(bhv);
169 ASSERT(ip);
170 lock_mode = xfs_ilock_map_shared(ip);
171
172 /* fill in fid section of handle from inode */
173 handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) -
174 sizeof(handle.ha_fid.xfs_fid_len);
175 handle.ha_fid.xfs_fid_pad = 0;
176 handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen;
177 handle.ha_fid.xfs_fid_ino = ip->i_ino;
178
179 xfs_iunlock_map_shared(ip, lock_mode);
180
181 hsize = XFS_HSIZE(handle);
182 }
183
184 /* now copy our handle into the user buffer & write out the size */
185 if (copy_to_user(hreq.ohandle, &handle, hsize) ||
186 copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) {
187 iput(inode);
188 return -XFS_ERROR(EFAULT);
189 }
190
191 iput(inode);
192 return 0;
193 }
194
195
196 /*
197 * Convert userspace handle data into vnode (and inode).
198 * We [ab]use the fact that all the fsop_handlereq ioctl calls
199 * have a data structure argument whose first component is always
200 * a xfs_fsop_handlereq_t, so we can cast to and from this type.
201 * This allows us to optimise the copy_from_user calls and gives
202 * a handy, shared routine.
203 *
204 * If no error, caller must always VN_RELE the returned vp.
205 */
206 STATIC int
207 xfs_vget_fsop_handlereq(
208 xfs_mount_t *mp,
209 struct inode *parinode, /* parent inode pointer */
210 xfs_fsop_handlereq_t *hreq,
211 vnode_t **vp,
212 struct inode **inode)
213 {
214 void __user *hanp;
215 size_t hlen;
216 xfs_fid_t *xfid;
217 xfs_handle_t *handlep;
218 xfs_handle_t handle;
219 xfs_inode_t *ip;
220 struct inode *inodep;
221 vnode_t *vpp;
222 xfs_ino_t ino;
223 __u32 igen;
224 int error;
225
226 /*
227 * Only allow handle opens under a directory.
228 */
229 if (!S_ISDIR(parinode->i_mode))
230 return XFS_ERROR(ENOTDIR);
231
232 hanp = hreq->ihandle;
233 hlen = hreq->ihandlen;
234 handlep = &handle;
235
236 if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
237 return XFS_ERROR(EINVAL);
238 if (copy_from_user(handlep, hanp, hlen))
239 return XFS_ERROR(EFAULT);
240 if (hlen < sizeof(*handlep))
241 memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen);
242 if (hlen > sizeof(handlep->ha_fsid)) {
243 if (handlep->ha_fid.xfs_fid_len !=
244 (hlen - sizeof(handlep->ha_fsid)
245 - sizeof(handlep->ha_fid.xfs_fid_len))
246 || handlep->ha_fid.xfs_fid_pad)
247 return XFS_ERROR(EINVAL);
248 }
249
250 /*
251 * Crack the handle, obtain the inode # & generation #
252 */
253 xfid = (struct xfs_fid *)&handlep->ha_fid;
254 if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
255 ino = xfid->xfs_fid_ino;
256 igen = xfid->xfs_fid_gen;
257 } else {
258 return XFS_ERROR(EINVAL);
259 }
260
261 /*
262 * Get the XFS inode, building a vnode to go with it.
263 */
264 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
265 if (error)
266 return error;
267 if (ip == NULL)
268 return XFS_ERROR(EIO);
269 if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) {
270 xfs_iput_new(ip, XFS_ILOCK_SHARED);
271 return XFS_ERROR(ENOENT);
272 }
273
274 vpp = XFS_ITOV(ip);
275 inodep = LINVFS_GET_IP(vpp);
276 xfs_iunlock(ip, XFS_ILOCK_SHARED);
277
278 *vp = vpp;
279 *inode = inodep;
280 return 0;
281 }
282
283 STATIC int
284 xfs_open_by_handle(
285 xfs_mount_t *mp,
286 void __user *arg,
287 struct file *parfilp,
288 struct inode *parinode)
289 {
290 int error;
291 int new_fd;
292 int permflag;
293 struct file *filp;
294 struct inode *inode;
295 struct dentry *dentry;
296 vnode_t *vp;
297 xfs_fsop_handlereq_t hreq;
298
299 if (!capable(CAP_SYS_ADMIN))
300 return -XFS_ERROR(EPERM);
301 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
302 return -XFS_ERROR(EFAULT);
303
304 error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode);
305 if (error)
306 return -error;
307
308 /* Restrict xfs_open_by_handle to directories & regular files. */
309 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
310 iput(inode);
311 return -XFS_ERROR(EINVAL);
312 }
313
314 #if BITS_PER_LONG != 32
315 hreq.oflags |= O_LARGEFILE;
316 #endif
317 /* Put open permission in namei format. */
318 permflag = hreq.oflags;
319 if ((permflag+1) & O_ACCMODE)
320 permflag++;
321 if (permflag & O_TRUNC)
322 permflag |= 2;
323
324 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
325 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
326 iput(inode);
327 return -XFS_ERROR(EPERM);
328 }
329
330 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
331 iput(inode);
332 return -XFS_ERROR(EACCES);
333 }
334
335 /* Can't write directories. */
336 if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
337 iput(inode);
338 return -XFS_ERROR(EISDIR);
339 }
340
341 if ((new_fd = get_unused_fd()) < 0) {
342 iput(inode);
343 return new_fd;
344 }
345
346 dentry = d_alloc_anon(inode);
347 if (dentry == NULL) {
348 iput(inode);
349 put_unused_fd(new_fd);
350 return -XFS_ERROR(ENOMEM);
351 }
352
353 /* Ensure umount returns EBUSY on umounts while this file is open. */
354 mntget(parfilp->f_vfsmnt);
355
356 /* Create file pointer. */
357 filp = dentry_open(dentry, parfilp->f_vfsmnt, hreq.oflags);
358 if (IS_ERR(filp)) {
359 put_unused_fd(new_fd);
360 return -XFS_ERROR(-PTR_ERR(filp));
361 }
362 if (inode->i_mode & S_IFREG)
363 filp->f_op = &linvfs_invis_file_operations;
364
365 fd_install(new_fd, filp);
366 return new_fd;
367 }
368
369 STATIC int
370 xfs_readlink_by_handle(
371 xfs_mount_t *mp,
372 void __user *arg,
373 struct file *parfilp,
374 struct inode *parinode)
375 {
376 int error;
377 struct iovec aiov;
378 struct uio auio;
379 struct inode *inode;
380 xfs_fsop_handlereq_t hreq;
381 vnode_t *vp;
382 __u32 olen;
383
384 if (!capable(CAP_SYS_ADMIN))
385 return -XFS_ERROR(EPERM);
386 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
387 return -XFS_ERROR(EFAULT);
388
389 error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode);
390 if (error)
391 return -error;
392
393 /* Restrict this handle operation to symlinks only. */
394 if (!S_ISLNK(inode->i_mode)) {
395 VN_RELE(vp);
396 return -XFS_ERROR(EINVAL);
397 }
398
399 if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) {
400 VN_RELE(vp);
401 return -XFS_ERROR(EFAULT);
402 }
403 aiov.iov_len = olen;
404 aiov.iov_base = hreq.ohandle;
405
406 auio.uio_iov = &aiov;
407 auio.uio_iovcnt = 1;
408 auio.uio_offset = 0;
409 auio.uio_segflg = UIO_USERSPACE;
410 auio.uio_resid = olen;
411
412 VOP_READLINK(vp, &auio, IO_INVIS, NULL, error);
413
414 VN_RELE(vp);
415 return (olen - auio.uio_resid);
416 }
417
418 STATIC int
419 xfs_fssetdm_by_handle(
420 xfs_mount_t *mp,
421 void __user *arg,
422 struct file *parfilp,
423 struct inode *parinode)
424 {
425 int error;
426 struct fsdmidata fsd;
427 xfs_fsop_setdm_handlereq_t dmhreq;
428 struct inode *inode;
429 bhv_desc_t *bdp;
430 vnode_t *vp;
431
432 if (!capable(CAP_MKNOD))
433 return -XFS_ERROR(EPERM);
434 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
435 return -XFS_ERROR(EFAULT);
436
437 error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &vp, &inode);
438 if (error)
439 return -error;
440
441 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
442 VN_RELE(vp);
443 return -XFS_ERROR(EPERM);
444 }
445
446 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
447 VN_RELE(vp);
448 return -XFS_ERROR(EFAULT);
449 }
450
451 bdp = bhv_base_unlocked(VN_BHV_HEAD(vp));
452 error = xfs_set_dmattrs(bdp, fsd.fsd_dmevmask, fsd.fsd_dmstate, NULL);
453
454 VN_RELE(vp);
455 if (error)
456 return -error;
457 return 0;
458 }
459
460 STATIC int
461 xfs_attrlist_by_handle(
462 xfs_mount_t *mp,
463 void __user *arg,
464 struct file *parfilp,
465 struct inode *parinode)
466 {
467 int error;
468 attrlist_cursor_kern_t *cursor;
469 xfs_fsop_attrlist_handlereq_t al_hreq;
470 struct inode *inode;
471 vnode_t *vp;
472 char *kbuf;
473
474 if (!capable(CAP_SYS_ADMIN))
475 return -XFS_ERROR(EPERM);
476 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
477 return -XFS_ERROR(EFAULT);
478 if (al_hreq.buflen > XATTR_LIST_MAX)
479 return -XFS_ERROR(EINVAL);
480
481 error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq,
482 &vp, &inode);
483 if (error)
484 goto out;
485
486 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
487 if (!kbuf)
488 goto out_vn_rele;
489
490 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
491 VOP_ATTR_LIST(vp, kbuf, al_hreq.buflen, al_hreq.flags,
492 cursor, NULL, error);
493 if (error)
494 goto out_kfree;
495
496 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
497 error = -EFAULT;
498
499 out_kfree:
500 kfree(kbuf);
501 out_vn_rele:
502 VN_RELE(vp);
503 out:
504 return -error;
505 }
506
507 STATIC int
508 xfs_attrmulti_attr_get(
509 struct vnode *vp,
510 char *name,
511 char __user *ubuf,
512 __uint32_t *len,
513 __uint32_t flags)
514 {
515 char *kbuf;
516 int error = EFAULT;
517
518 if (*len > XATTR_SIZE_MAX)
519 return EINVAL;
520 kbuf = kmalloc(*len, GFP_KERNEL);
521 if (!kbuf)
522 return ENOMEM;
523
524 VOP_ATTR_GET(vp, name, kbuf, len, flags, NULL, error);
525 if (error)
526 goto out_kfree;
527
528 if (copy_to_user(ubuf, kbuf, *len))
529 error = EFAULT;
530
531 out_kfree:
532 kfree(kbuf);
533 return error;
534 }
535
536 STATIC int
537 xfs_attrmulti_attr_set(
538 struct vnode *vp,
539 char *name,
540 const char __user *ubuf,
541 __uint32_t len,
542 __uint32_t flags)
543 {
544 char *kbuf;
545 int error = EFAULT;
546
547 if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
548 return EPERM;
549 if (len > XATTR_SIZE_MAX)
550 return EINVAL;
551
552 kbuf = kmalloc(len, GFP_KERNEL);
553 if (!kbuf)
554 return ENOMEM;
555
556 if (copy_from_user(kbuf, ubuf, len))
557 goto out_kfree;
558
559 VOP_ATTR_SET(vp, name, kbuf, len, flags, NULL, error);
560
561 out_kfree:
562 kfree(kbuf);
563 return error;
564 }
565
566 STATIC int
567 xfs_attrmulti_attr_remove(
568 struct vnode *vp,
569 char *name,
570 __uint32_t flags)
571 {
572 int error;
573
574 if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
575 return EPERM;
576
577 VOP_ATTR_REMOVE(vp, name, flags, NULL, error);
578 return error;
579 }
580
581 STATIC int
582 xfs_attrmulti_by_handle(
583 xfs_mount_t *mp,
584 void __user *arg,
585 struct file *parfilp,
586 struct inode *parinode)
587 {
588 int error;
589 xfs_attr_multiop_t *ops;
590 xfs_fsop_attrmulti_handlereq_t am_hreq;
591 struct inode *inode;
592 vnode_t *vp;
593 unsigned int i, size;
594 char *attr_name;
595
596 if (!capable(CAP_SYS_ADMIN))
597 return -XFS_ERROR(EPERM);
598 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
599 return -XFS_ERROR(EFAULT);
600
601 error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &vp, &inode);
602 if (error)
603 goto out;
604
605 error = E2BIG;
606 size = am_hreq.opcount * sizeof(attr_multiop_t);
607 if (!size || size > 16 * PAGE_SIZE)
608 goto out_vn_rele;
609
610 error = ENOMEM;
611 ops = kmalloc(size, GFP_KERNEL);
612 if (!ops)
613 goto out_vn_rele;
614
615 error = EFAULT;
616 if (copy_from_user(ops, am_hreq.ops, size))
617 goto out_kfree_ops;
618
619 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
620 if (!attr_name)
621 goto out_kfree_ops;
622
623
624 error = 0;
625 for (i = 0; i < am_hreq.opcount; i++) {
626 ops[i].am_error = strncpy_from_user(attr_name,
627 ops[i].am_attrname, MAXNAMELEN);
628 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
629 error = -ERANGE;
630 if (ops[i].am_error < 0)
631 break;
632
633 switch (ops[i].am_opcode) {
634 case ATTR_OP_GET:
635 ops[i].am_error = xfs_attrmulti_attr_get(vp,
636 attr_name, ops[i].am_attrvalue,
637 &ops[i].am_length, ops[i].am_flags);
638 break;
639 case ATTR_OP_SET:
640 ops[i].am_error = xfs_attrmulti_attr_set(vp,
641 attr_name, ops[i].am_attrvalue,
642 ops[i].am_length, ops[i].am_flags);
643 break;
644 case ATTR_OP_REMOVE:
645 ops[i].am_error = xfs_attrmulti_attr_remove(vp,
646 attr_name, ops[i].am_flags);
647 break;
648 default:
649 ops[i].am_error = EINVAL;
650 }
651 }
652
653 if (copy_to_user(am_hreq.ops, ops, size))
654 error = XFS_ERROR(EFAULT);
655
656 kfree(attr_name);
657 out_kfree_ops:
658 kfree(ops);
659 out_vn_rele:
660 VN_RELE(vp);
661 out:
662 return -error;
663 }
664
665 /* prototypes for a few of the stack-hungry cases that have
666 * their own functions. Functions are defined after their use
667 * so gcc doesn't get fancy and inline them with -03 */
668
669 STATIC int
670 xfs_ioc_space(
671 bhv_desc_t *bdp,
672 vnode_t *vp,
673 struct file *filp,
674 int flags,
675 unsigned int cmd,
676 void __user *arg);
677
678 STATIC int
679 xfs_ioc_bulkstat(
680 xfs_mount_t *mp,
681 unsigned int cmd,
682 void __user *arg);
683
684 STATIC int
685 xfs_ioc_fsgeometry_v1(
686 xfs_mount_t *mp,
687 void __user *arg);
688
689 STATIC int
690 xfs_ioc_fsgeometry(
691 xfs_mount_t *mp,
692 void __user *arg);
693
694 STATIC int
695 xfs_ioc_xattr(
696 vnode_t *vp,
697 xfs_inode_t *ip,
698 struct file *filp,
699 unsigned int cmd,
700 void __user *arg);
701
702 STATIC int
703 xfs_ioc_getbmap(
704 bhv_desc_t *bdp,
705 struct file *filp,
706 int flags,
707 unsigned int cmd,
708 void __user *arg);
709
710 STATIC int
711 xfs_ioc_getbmapx(
712 bhv_desc_t *bdp,
713 void __user *arg);
714
715 int
716 xfs_ioctl(
717 bhv_desc_t *bdp,
718 struct inode *inode,
719 struct file *filp,
720 int ioflags,
721 unsigned int cmd,
722 void __user *arg)
723 {
724 int error;
725 vnode_t *vp;
726 xfs_inode_t *ip;
727 xfs_mount_t *mp;
728
729 vp = LINVFS_GET_VP(inode);
730
731 vn_trace_entry(vp, "xfs_ioctl", (inst_t *)__return_address);
732
733 ip = XFS_BHVTOI(bdp);
734 mp = ip->i_mount;
735
736 switch (cmd) {
737
738 case XFS_IOC_ALLOCSP:
739 case XFS_IOC_FREESP:
740 case XFS_IOC_RESVSP:
741 case XFS_IOC_UNRESVSP:
742 case XFS_IOC_ALLOCSP64:
743 case XFS_IOC_FREESP64:
744 case XFS_IOC_RESVSP64:
745 case XFS_IOC_UNRESVSP64:
746 /*
747 * Only allow the sys admin to reserve space unless
748 * unwritten extents are enabled.
749 */
750 if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) &&
751 !capable(CAP_SYS_ADMIN))
752 return -EPERM;
753
754 return xfs_ioc_space(bdp, vp, filp, ioflags, cmd, arg);
755
756 case XFS_IOC_DIOINFO: {
757 struct dioattr da;
758 xfs_buftarg_t *target =
759 (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
760 mp->m_rtdev_targp : mp->m_ddev_targp;
761
762 da.d_mem = da.d_miniosz = 1 << target->pbr_sshift;
763 /* The size dio will do in one go */
764 da.d_maxiosz = 64 * PAGE_CACHE_SIZE;
765
766 if (copy_to_user(arg, &da, sizeof(da)))
767 return -XFS_ERROR(EFAULT);
768 return 0;
769 }
770
771 case XFS_IOC_FSBULKSTAT_SINGLE:
772 case XFS_IOC_FSBULKSTAT:
773 case XFS_IOC_FSINUMBERS:
774 return xfs_ioc_bulkstat(mp, cmd, arg);
775
776 case XFS_IOC_FSGEOMETRY_V1:
777 return xfs_ioc_fsgeometry_v1(mp, arg);
778
779 case XFS_IOC_FSGEOMETRY:
780 return xfs_ioc_fsgeometry(mp, arg);
781
782 case XFS_IOC_GETVERSION:
783 case XFS_IOC_GETXFLAGS:
784 case XFS_IOC_SETXFLAGS:
785 case XFS_IOC_FSGETXATTR:
786 case XFS_IOC_FSSETXATTR:
787 case XFS_IOC_FSGETXATTRA:
788 return xfs_ioc_xattr(vp, ip, filp, cmd, arg);
789
790 case XFS_IOC_FSSETDM: {
791 struct fsdmidata dmi;
792
793 if (copy_from_user(&dmi, arg, sizeof(dmi)))
794 return -XFS_ERROR(EFAULT);
795
796 error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate,
797 NULL);
798 return -error;
799 }
800
801 case XFS_IOC_GETBMAP:
802 case XFS_IOC_GETBMAPA:
803 return xfs_ioc_getbmap(bdp, filp, ioflags, cmd, arg);
804
805 case XFS_IOC_GETBMAPX:
806 return xfs_ioc_getbmapx(bdp, arg);
807
808 case XFS_IOC_FD_TO_HANDLE:
809 case XFS_IOC_PATH_TO_HANDLE:
810 case XFS_IOC_PATH_TO_FSHANDLE:
811 return xfs_find_handle(cmd, arg);
812
813 case XFS_IOC_OPEN_BY_HANDLE:
814 return xfs_open_by_handle(mp, arg, filp, inode);
815
816 case XFS_IOC_FSSETDM_BY_HANDLE:
817 return xfs_fssetdm_by_handle(mp, arg, filp, inode);
818
819 case XFS_IOC_READLINK_BY_HANDLE:
820 return xfs_readlink_by_handle(mp, arg, filp, inode);
821
822 case XFS_IOC_ATTRLIST_BY_HANDLE:
823 return xfs_attrlist_by_handle(mp, arg, filp, inode);
824
825 case XFS_IOC_ATTRMULTI_BY_HANDLE:
826 return xfs_attrmulti_by_handle(mp, arg, filp, inode);
827
828 case XFS_IOC_SWAPEXT: {
829 error = xfs_swapext((struct xfs_swapext __user *)arg);
830 return -error;
831 }
832
833 case XFS_IOC_FSCOUNTS: {
834 xfs_fsop_counts_t out;
835
836 error = xfs_fs_counts(mp, &out);
837 if (error)
838 return -error;
839
840 if (copy_to_user(arg, &out, sizeof(out)))
841 return -XFS_ERROR(EFAULT);
842 return 0;
843 }
844
845 case XFS_IOC_SET_RESBLKS: {
846 xfs_fsop_resblks_t inout;
847 __uint64_t in;
848
849 if (!capable(CAP_SYS_ADMIN))
850 return -EPERM;
851
852 if (copy_from_user(&inout, arg, sizeof(inout)))
853 return -XFS_ERROR(EFAULT);
854
855 /* input parameter is passed in resblks field of structure */
856 in = inout.resblks;
857 error = xfs_reserve_blocks(mp, &in, &inout);
858 if (error)
859 return -error;
860
861 if (copy_to_user(arg, &inout, sizeof(inout)))
862 return -XFS_ERROR(EFAULT);
863 return 0;
864 }
865
866 case XFS_IOC_GET_RESBLKS: {
867 xfs_fsop_resblks_t out;
868
869 if (!capable(CAP_SYS_ADMIN))
870 return -EPERM;
871
872 error = xfs_reserve_blocks(mp, NULL, &out);
873 if (error)
874 return -error;
875
876 if (copy_to_user(arg, &out, sizeof(out)))
877 return -XFS_ERROR(EFAULT);
878
879 return 0;
880 }
881
882 case XFS_IOC_FSGROWFSDATA: {
883 xfs_growfs_data_t in;
884
885 if (!capable(CAP_SYS_ADMIN))
886 return -EPERM;
887
888 if (copy_from_user(&in, arg, sizeof(in)))
889 return -XFS_ERROR(EFAULT);
890
891 error = xfs_growfs_data(mp, &in);
892 return -error;
893 }
894
895 case XFS_IOC_FSGROWFSLOG: {
896 xfs_growfs_log_t in;
897
898 if (!capable(CAP_SYS_ADMIN))
899 return -EPERM;
900
901 if (copy_from_user(&in, arg, sizeof(in)))
902 return -XFS_ERROR(EFAULT);
903
904 error = xfs_growfs_log(mp, &in);
905 return -error;
906 }
907
908 case XFS_IOC_FSGROWFSRT: {
909 xfs_growfs_rt_t in;
910
911 if (!capable(CAP_SYS_ADMIN))
912 return -EPERM;
913
914 if (copy_from_user(&in, arg, sizeof(in)))
915 return -XFS_ERROR(EFAULT);
916
917 error = xfs_growfs_rt(mp, &in);
918 return -error;
919 }
920
921 case XFS_IOC_FREEZE:
922 if (!capable(CAP_SYS_ADMIN))
923 return -EPERM;
924
925 if (inode->i_sb->s_frozen == SB_UNFROZEN)
926 freeze_bdev(inode->i_sb->s_bdev);
927 return 0;
928
929 case XFS_IOC_THAW:
930 if (!capable(CAP_SYS_ADMIN))
931 return -EPERM;
932 if (inode->i_sb->s_frozen != SB_UNFROZEN)
933 thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);
934 return 0;
935
936 case XFS_IOC_GOINGDOWN: {
937 __uint32_t in;
938
939 if (!capable(CAP_SYS_ADMIN))
940 return -EPERM;
941
942 if (get_user(in, (__uint32_t __user *)arg))
943 return -XFS_ERROR(EFAULT);
944
945 error = xfs_fs_goingdown(mp, in);
946 return -error;
947 }
948
949 case XFS_IOC_ERROR_INJECTION: {
950 xfs_error_injection_t in;
951
952 if (!capable(CAP_SYS_ADMIN))
953 return -EPERM;
954
955 if (copy_from_user(&in, arg, sizeof(in)))
956 return -XFS_ERROR(EFAULT);
957
958 error = xfs_errortag_add(in.errtag, mp);
959 return -error;
960 }
961
962 case XFS_IOC_ERROR_CLEARALL:
963 if (!capable(CAP_SYS_ADMIN))
964 return -EPERM;
965
966 error = xfs_errortag_clearall(mp);
967 return -error;
968
969 default:
970 return -ENOTTY;
971 }
972 }
973
974 STATIC int
975 xfs_ioc_space(
976 bhv_desc_t *bdp,
977 vnode_t *vp,
978 struct file *filp,
979 int ioflags,
980 unsigned int cmd,
981 void __user *arg)
982 {
983 xfs_flock64_t bf;
984 int attr_flags = 0;
985 int error;
986
987 if (vp->v_inode.i_flags & (S_IMMUTABLE|S_APPEND))
988 return -XFS_ERROR(EPERM);
989
990 if (!(filp->f_mode & FMODE_WRITE))
991 return -XFS_ERROR(EBADF);
992
993 if (!VN_ISREG(vp))
994 return -XFS_ERROR(EINVAL);
995
996 if (copy_from_user(&bf, arg, sizeof(bf)))
997 return -XFS_ERROR(EFAULT);
998
999 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1000 attr_flags |= ATTR_NONBLOCK;
1001 if (ioflags & IO_INVIS)
1002 attr_flags |= ATTR_DMI;
1003
1004 error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos,
1005 NULL, attr_flags);
1006 return -error;
1007 }
1008
1009 STATIC int
1010 xfs_ioc_bulkstat(
1011 xfs_mount_t *mp,
1012 unsigned int cmd,
1013 void __user *arg)
1014 {
1015 xfs_fsop_bulkreq_t bulkreq;
1016 int count; /* # of records returned */
1017 xfs_ino_t inlast; /* last inode number */
1018 int done;
1019 int error;
1020
1021 /* done = 1 if there are more stats to get and if bulkstat */
1022 /* should be called again (unused here, but used in dmapi) */
1023
1024 if (!capable(CAP_SYS_ADMIN))
1025 return -EPERM;
1026
1027 if (XFS_FORCED_SHUTDOWN(mp))
1028 return -XFS_ERROR(EIO);
1029
1030 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
1031 return -XFS_ERROR(EFAULT);
1032
1033 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
1034 return -XFS_ERROR(EFAULT);
1035
1036 if ((count = bulkreq.icount) <= 0)
1037 return -XFS_ERROR(EINVAL);
1038
1039 if (cmd == XFS_IOC_FSINUMBERS)
1040 error = xfs_inumbers(mp, &inlast, &count,
1041 bulkreq.ubuffer);
1042 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
1043 error = xfs_bulkstat_single(mp, &inlast,
1044 bulkreq.ubuffer, &done);
1045 else { /* XFS_IOC_FSBULKSTAT */
1046 if (count == 1 && inlast != 0) {
1047 inlast++;
1048 error = xfs_bulkstat_single(mp, &inlast,
1049 bulkreq.ubuffer, &done);
1050 } else {
1051 error = xfs_bulkstat(mp, &inlast, &count,
1052 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
1053 sizeof(xfs_bstat_t), bulkreq.ubuffer,
1054 BULKSTAT_FG_QUICK, &done);
1055 }
1056 }
1057
1058 if (error)
1059 return -error;
1060
1061 if (bulkreq.ocount != NULL) {
1062 if (copy_to_user(bulkreq.lastip, &inlast,
1063 sizeof(xfs_ino_t)))
1064 return -XFS_ERROR(EFAULT);
1065
1066 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
1067 return -XFS_ERROR(EFAULT);
1068 }
1069
1070 return 0;
1071 }
1072
1073 STATIC int
1074 xfs_ioc_fsgeometry_v1(
1075 xfs_mount_t *mp,
1076 void __user *arg)
1077 {
1078 xfs_fsop_geom_v1_t fsgeo;
1079 int error;
1080
1081 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
1082 if (error)
1083 return -error;
1084
1085 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
1086 return -XFS_ERROR(EFAULT);
1087 return 0;
1088 }
1089
1090 STATIC int
1091 xfs_ioc_fsgeometry(
1092 xfs_mount_t *mp,
1093 void __user *arg)
1094 {
1095 xfs_fsop_geom_t fsgeo;
1096 int error;
1097
1098 error = xfs_fs_geometry(mp, &fsgeo, 4);
1099 if (error)
1100 return -error;
1101
1102 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
1103 return -XFS_ERROR(EFAULT);
1104 return 0;
1105 }
1106
1107 /*
1108 * Linux extended inode flags interface.
1109 */
1110 #define LINUX_XFLAG_SYNC 0x00000008 /* Synchronous updates */
1111 #define LINUX_XFLAG_IMMUTABLE 0x00000010 /* Immutable file */
1112 #define LINUX_XFLAG_APPEND 0x00000020 /* writes to file may only append */
1113 #define LINUX_XFLAG_NODUMP 0x00000040 /* do not dump file */
1114 #define LINUX_XFLAG_NOATIME 0x00000080 /* do not update atime */
1115
1116 STATIC unsigned int
1117 xfs_merge_ioc_xflags(
1118 unsigned int flags,
1119 unsigned int start)
1120 {
1121 unsigned int xflags = start;
1122
1123 if (flags & LINUX_XFLAG_IMMUTABLE)
1124 xflags |= XFS_XFLAG_IMMUTABLE;
1125 else
1126 xflags &= ~XFS_XFLAG_IMMUTABLE;
1127 if (flags & LINUX_XFLAG_APPEND)
1128 xflags |= XFS_XFLAG_APPEND;
1129 else
1130 xflags &= ~XFS_XFLAG_APPEND;
1131 if (flags & LINUX_XFLAG_SYNC)
1132 xflags |= XFS_XFLAG_SYNC;
1133 else
1134 xflags &= ~XFS_XFLAG_SYNC;
1135 if (flags & LINUX_XFLAG_NOATIME)
1136 xflags |= XFS_XFLAG_NOATIME;
1137 else
1138 xflags &= ~XFS_XFLAG_NOATIME;
1139 if (flags & LINUX_XFLAG_NODUMP)
1140 xflags |= XFS_XFLAG_NODUMP;
1141 else
1142 xflags &= ~XFS_XFLAG_NODUMP;
1143
1144 return xflags;
1145 }
1146
1147 STATIC unsigned int
1148 xfs_di2lxflags(
1149 __uint16_t di_flags)
1150 {
1151 unsigned int flags = 0;
1152
1153 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1154 flags |= LINUX_XFLAG_IMMUTABLE;
1155 if (di_flags & XFS_DIFLAG_APPEND)
1156 flags |= LINUX_XFLAG_APPEND;
1157 if (di_flags & XFS_DIFLAG_SYNC)
1158 flags |= LINUX_XFLAG_SYNC;
1159 if (di_flags & XFS_DIFLAG_NOATIME)
1160 flags |= LINUX_XFLAG_NOATIME;
1161 if (di_flags & XFS_DIFLAG_NODUMP)
1162 flags |= LINUX_XFLAG_NODUMP;
1163 return flags;
1164 }
1165
1166 STATIC int
1167 xfs_ioc_xattr(
1168 vnode_t *vp,
1169 xfs_inode_t *ip,
1170 struct file *filp,
1171 unsigned int cmd,
1172 void __user *arg)
1173 {
1174 struct fsxattr fa;
1175 vattr_t va;
1176 int error;
1177 int attr_flags;
1178 unsigned int flags;
1179
1180 switch (cmd) {
1181 case XFS_IOC_FSGETXATTR: {
1182 va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \
1183 XFS_AT_NEXTENTS | XFS_AT_PROJID;
1184 VOP_GETATTR(vp, &va, 0, NULL, error);
1185 if (error)
1186 return -error;
1187
1188 fa.fsx_xflags = va.va_xflags;
1189 fa.fsx_extsize = va.va_extsize;
1190 fa.fsx_nextents = va.va_nextents;
1191 fa.fsx_projid = va.va_projid;
1192
1193 if (copy_to_user(arg, &fa, sizeof(fa)))
1194 return -XFS_ERROR(EFAULT);
1195 return 0;
1196 }
1197
1198 case XFS_IOC_FSSETXATTR: {
1199 if (copy_from_user(&fa, arg, sizeof(fa)))
1200 return -XFS_ERROR(EFAULT);
1201
1202 attr_flags = 0;
1203 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1204 attr_flags |= ATTR_NONBLOCK;
1205
1206 va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | XFS_AT_PROJID;
1207 va.va_xflags = fa.fsx_xflags;
1208 va.va_extsize = fa.fsx_extsize;
1209 va.va_projid = fa.fsx_projid;
1210
1211 VOP_SETATTR(vp, &va, attr_flags, NULL, error);
1212 if (!error)
1213 vn_revalidate(vp); /* update Linux inode flags */
1214 return -error;
1215 }
1216
1217 case XFS_IOC_FSGETXATTRA: {
1218 va.va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \
1219 XFS_AT_ANEXTENTS | XFS_AT_PROJID;
1220 VOP_GETATTR(vp, &va, 0, NULL, error);
1221 if (error)
1222 return -error;
1223
1224 fa.fsx_xflags = va.va_xflags;
1225 fa.fsx_extsize = va.va_extsize;
1226 fa.fsx_nextents = va.va_anextents;
1227 fa.fsx_projid = va.va_projid;
1228
1229 if (copy_to_user(arg, &fa, sizeof(fa)))
1230 return -XFS_ERROR(EFAULT);
1231 return 0;
1232 }
1233
1234 case XFS_IOC_GETXFLAGS: {
1235 flags = xfs_di2lxflags(ip->i_d.di_flags);
1236 if (copy_to_user(arg, &flags, sizeof(flags)))
1237 return -XFS_ERROR(EFAULT);
1238 return 0;
1239 }
1240
1241 case XFS_IOC_SETXFLAGS: {
1242 if (copy_from_user(&flags, arg, sizeof(flags)))
1243 return -XFS_ERROR(EFAULT);
1244
1245 if (flags & ~(LINUX_XFLAG_IMMUTABLE | LINUX_XFLAG_APPEND | \
1246 LINUX_XFLAG_NOATIME | LINUX_XFLAG_NODUMP | \
1247 LINUX_XFLAG_SYNC))
1248 return -XFS_ERROR(EOPNOTSUPP);
1249
1250 attr_flags = 0;
1251 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1252 attr_flags |= ATTR_NONBLOCK;
1253
1254 va.va_mask = XFS_AT_XFLAGS;
1255 va.va_xflags = xfs_merge_ioc_xflags(flags,
1256 xfs_ip2xflags(ip));
1257
1258 VOP_SETATTR(vp, &va, attr_flags, NULL, error);
1259 if (!error)
1260 vn_revalidate(vp); /* update Linux inode flags */
1261 return -error;
1262 }
1263
1264 case XFS_IOC_GETVERSION: {
1265 flags = LINVFS_GET_IP(vp)->i_generation;
1266 if (copy_to_user(arg, &flags, sizeof(flags)))
1267 return -XFS_ERROR(EFAULT);
1268 return 0;
1269 }
1270
1271 default:
1272 return -ENOTTY;
1273 }
1274 }
1275
1276 STATIC int
1277 xfs_ioc_getbmap(
1278 bhv_desc_t *bdp,
1279 struct file *filp,
1280 int ioflags,
1281 unsigned int cmd,
1282 void __user *arg)
1283 {
1284 struct getbmap bm;
1285 int iflags;
1286 int error;
1287
1288 if (copy_from_user(&bm, arg, sizeof(bm)))
1289 return -XFS_ERROR(EFAULT);
1290
1291 if (bm.bmv_count < 2)
1292 return -XFS_ERROR(EINVAL);
1293
1294 iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1295 if (ioflags & IO_INVIS)
1296 iflags |= BMV_IF_NO_DMAPI_READ;
1297
1298 error = xfs_getbmap(bdp, &bm, (struct getbmap __user *)arg+1, iflags);
1299 if (error)
1300 return -error;
1301
1302 if (copy_to_user(arg, &bm, sizeof(bm)))
1303 return -XFS_ERROR(EFAULT);
1304 return 0;
1305 }
1306
1307 STATIC int
1308 xfs_ioc_getbmapx(
1309 bhv_desc_t *bdp,
1310 void __user *arg)
1311 {
1312 struct getbmapx bmx;
1313 struct getbmap bm;
1314 int iflags;
1315 int error;
1316
1317 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1318 return -XFS_ERROR(EFAULT);
1319
1320 if (bmx.bmv_count < 2)
1321 return -XFS_ERROR(EINVAL);
1322
1323 /*
1324 * Map input getbmapx structure to a getbmap
1325 * structure for xfs_getbmap.
1326 */
1327 GETBMAP_CONVERT(bmx, bm);
1328
1329 iflags = bmx.bmv_iflags;
1330
1331 if (iflags & (~BMV_IF_VALID))
1332 return -XFS_ERROR(EINVAL);
1333
1334 iflags |= BMV_IF_EXTENDED;
1335
1336 error = xfs_getbmap(bdp, &bm, (struct getbmapx __user *)arg+1, iflags);
1337 if (error)
1338 return -error;
1339
1340 GETBMAP_CONVERT(bm, bmx);
1341
1342 if (copy_to_user(arg, &bmx, sizeof(bmx)))
1343 return -XFS_ERROR(EFAULT);
1344
1345 return 0;
1346 }
kernel source for telekom puls (alcatel/mediatek)