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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 | */ | |
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 | } |