Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
1da177e4 | 19 | #include "xfs_fs.h" |
a844f451 | 20 | #include "xfs_bit.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_sb.h" | |
a844f451 | 25 | #include "xfs_ag.h" |
1da177e4 LT |
26 | #include "xfs_dir2.h" |
27 | #include "xfs_alloc.h" | |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_mount.h" | |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_alloc_btree.h" |
1da177e4 | 32 | #include "xfs_ialloc_btree.h" |
a844f451 | 33 | #include "xfs_attr_sf.h" |
1da177e4 LT |
34 | #include "xfs_dir2_sf.h" |
35 | #include "xfs_dinode.h" | |
36 | #include "xfs_inode.h" | |
a844f451 NS |
37 | #include "xfs_btree.h" |
38 | #include "xfs_ialloc.h" | |
1da177e4 | 39 | #include "xfs_rtalloc.h" |
1da177e4 | 40 | #include "xfs_itable.h" |
a844f451 | 41 | #include "xfs_error.h" |
1da177e4 LT |
42 | #include "xfs_rw.h" |
43 | #include "xfs_acl.h" | |
1da177e4 | 44 | #include "xfs_attr.h" |
a844f451 | 45 | #include "xfs_bmap.h" |
1da177e4 LT |
46 | #include "xfs_buf_item.h" |
47 | #include "xfs_utils.h" | |
48 | #include "xfs_dfrag.h" | |
49 | #include "xfs_fsops.h" | |
50 | ||
16f7e0fe | 51 | #include <linux/capability.h> |
1da177e4 LT |
52 | #include <linux/dcache.h> |
53 | #include <linux/mount.h> | |
54 | #include <linux/namei.h> | |
55 | #include <linux/pagemap.h> | |
56 | ||
57 | /* | |
58 | * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to | |
59 | * a file or fs handle. | |
60 | * | |
61 | * XFS_IOC_PATH_TO_FSHANDLE | |
62 | * returns fs handle for a mount point or path within that mount point | |
63 | * XFS_IOC_FD_TO_HANDLE | |
64 | * returns full handle for a FD opened in user space | |
65 | * XFS_IOC_PATH_TO_HANDLE | |
66 | * returns full handle for a path | |
67 | */ | |
68 | STATIC int | |
69 | xfs_find_handle( | |
70 | unsigned int cmd, | |
71 | void __user *arg) | |
72 | { | |
73 | int hsize; | |
74 | xfs_handle_t handle; | |
75 | xfs_fsop_handlereq_t hreq; | |
76 | struct inode *inode; | |
67fcaa73 | 77 | bhv_vnode_t *vp; |
1da177e4 LT |
78 | |
79 | if (copy_from_user(&hreq, arg, sizeof(hreq))) | |
80 | return -XFS_ERROR(EFAULT); | |
81 | ||
82 | memset((char *)&handle, 0, sizeof(handle)); | |
83 | ||
84 | switch (cmd) { | |
85 | case XFS_IOC_PATH_TO_FSHANDLE: | |
86 | case XFS_IOC_PATH_TO_HANDLE: { | |
87 | struct nameidata nd; | |
88 | int error; | |
89 | ||
90 | error = user_path_walk_link((const char __user *)hreq.path, &nd); | |
91 | if (error) | |
92 | return error; | |
93 | ||
94 | ASSERT(nd.dentry); | |
95 | ASSERT(nd.dentry->d_inode); | |
96 | inode = igrab(nd.dentry->d_inode); | |
97 | path_release(&nd); | |
98 | break; | |
99 | } | |
100 | ||
101 | case XFS_IOC_FD_TO_HANDLE: { | |
102 | struct file *file; | |
103 | ||
104 | file = fget(hreq.fd); | |
105 | if (!file) | |
106 | return -EBADF; | |
107 | ||
e678fb0d JJS |
108 | ASSERT(file->f_path.dentry); |
109 | ASSERT(file->f_path.dentry->d_inode); | |
110 | inode = igrab(file->f_path.dentry->d_inode); | |
1da177e4 LT |
111 | fput(file); |
112 | break; | |
113 | } | |
114 | ||
115 | default: | |
116 | ASSERT(0); | |
117 | return -XFS_ERROR(EINVAL); | |
118 | } | |
119 | ||
120 | if (inode->i_sb->s_magic != XFS_SB_MAGIC) { | |
121 | /* we're not in XFS anymore, Toto */ | |
122 | iput(inode); | |
123 | return -XFS_ERROR(EINVAL); | |
124 | } | |
125 | ||
0432dab2 CH |
126 | switch (inode->i_mode & S_IFMT) { |
127 | case S_IFREG: | |
128 | case S_IFDIR: | |
129 | case S_IFLNK: | |
130 | break; | |
131 | default: | |
1da177e4 LT |
132 | iput(inode); |
133 | return -XFS_ERROR(EBADF); | |
134 | } | |
135 | ||
0432dab2 | 136 | /* we need the vnode */ |
ec86dc02 | 137 | vp = vn_from_inode(inode); |
0432dab2 | 138 | |
1da177e4 LT |
139 | /* now we can grab the fsid */ |
140 | memcpy(&handle.ha_fsid, vp->v_vfsp->vfs_altfsid, sizeof(xfs_fsid_t)); | |
141 | hsize = sizeof(xfs_fsid_t); | |
142 | ||
143 | if (cmd != XFS_IOC_PATH_TO_FSHANDLE) { | |
144 | xfs_inode_t *ip; | |
1da177e4 LT |
145 | int lock_mode; |
146 | ||
147 | /* need to get access to the xfs_inode to read the generation */ | |
75e17b3c | 148 | ip = xfs_vtoi(vp); |
1da177e4 LT |
149 | ASSERT(ip); |
150 | lock_mode = xfs_ilock_map_shared(ip); | |
151 | ||
152 | /* fill in fid section of handle from inode */ | |
153 | handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) - | |
154 | sizeof(handle.ha_fid.xfs_fid_len); | |
155 | handle.ha_fid.xfs_fid_pad = 0; | |
156 | handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen; | |
157 | handle.ha_fid.xfs_fid_ino = ip->i_ino; | |
158 | ||
159 | xfs_iunlock_map_shared(ip, lock_mode); | |
160 | ||
161 | hsize = XFS_HSIZE(handle); | |
162 | } | |
163 | ||
164 | /* now copy our handle into the user buffer & write out the size */ | |
165 | if (copy_to_user(hreq.ohandle, &handle, hsize) || | |
166 | copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) { | |
167 | iput(inode); | |
168 | return -XFS_ERROR(EFAULT); | |
169 | } | |
170 | ||
171 | iput(inode); | |
172 | return 0; | |
173 | } | |
174 | ||
175 | ||
176 | /* | |
177 | * Convert userspace handle data into vnode (and inode). | |
178 | * We [ab]use the fact that all the fsop_handlereq ioctl calls | |
179 | * have a data structure argument whose first component is always | |
180 | * a xfs_fsop_handlereq_t, so we can cast to and from this type. | |
181 | * This allows us to optimise the copy_from_user calls and gives | |
182 | * a handy, shared routine. | |
183 | * | |
184 | * If no error, caller must always VN_RELE the returned vp. | |
185 | */ | |
186 | STATIC int | |
187 | xfs_vget_fsop_handlereq( | |
188 | xfs_mount_t *mp, | |
189 | struct inode *parinode, /* parent inode pointer */ | |
190 | xfs_fsop_handlereq_t *hreq, | |
67fcaa73 | 191 | bhv_vnode_t **vp, |
1da177e4 LT |
192 | struct inode **inode) |
193 | { | |
194 | void __user *hanp; | |
195 | size_t hlen; | |
196 | xfs_fid_t *xfid; | |
197 | xfs_handle_t *handlep; | |
198 | xfs_handle_t handle; | |
199 | xfs_inode_t *ip; | |
200 | struct inode *inodep; | |
67fcaa73 | 201 | bhv_vnode_t *vpp; |
1da177e4 LT |
202 | xfs_ino_t ino; |
203 | __u32 igen; | |
204 | int error; | |
205 | ||
206 | /* | |
207 | * Only allow handle opens under a directory. | |
208 | */ | |
209 | if (!S_ISDIR(parinode->i_mode)) | |
210 | return XFS_ERROR(ENOTDIR); | |
211 | ||
212 | hanp = hreq->ihandle; | |
213 | hlen = hreq->ihandlen; | |
214 | handlep = &handle; | |
215 | ||
216 | if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep)) | |
217 | return XFS_ERROR(EINVAL); | |
218 | if (copy_from_user(handlep, hanp, hlen)) | |
219 | return XFS_ERROR(EFAULT); | |
220 | if (hlen < sizeof(*handlep)) | |
221 | memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen); | |
222 | if (hlen > sizeof(handlep->ha_fsid)) { | |
223 | if (handlep->ha_fid.xfs_fid_len != | |
224 | (hlen - sizeof(handlep->ha_fsid) | |
225 | - sizeof(handlep->ha_fid.xfs_fid_len)) | |
226 | || handlep->ha_fid.xfs_fid_pad) | |
227 | return XFS_ERROR(EINVAL); | |
228 | } | |
229 | ||
230 | /* | |
231 | * Crack the handle, obtain the inode # & generation # | |
232 | */ | |
233 | xfid = (struct xfs_fid *)&handlep->ha_fid; | |
234 | if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) { | |
235 | ino = xfid->xfs_fid_ino; | |
236 | igen = xfid->xfs_fid_gen; | |
237 | } else { | |
238 | return XFS_ERROR(EINVAL); | |
239 | } | |
240 | ||
241 | /* | |
242 | * Get the XFS inode, building a vnode to go with it. | |
243 | */ | |
244 | error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0); | |
245 | if (error) | |
246 | return error; | |
247 | if (ip == NULL) | |
248 | return XFS_ERROR(EIO); | |
249 | if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) { | |
250 | xfs_iput_new(ip, XFS_ILOCK_SHARED); | |
251 | return XFS_ERROR(ENOENT); | |
252 | } | |
253 | ||
254 | vpp = XFS_ITOV(ip); | |
ec86dc02 | 255 | inodep = vn_to_inode(vpp); |
1da177e4 LT |
256 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
257 | ||
258 | *vp = vpp; | |
259 | *inode = inodep; | |
260 | return 0; | |
261 | } | |
262 | ||
263 | STATIC int | |
264 | xfs_open_by_handle( | |
265 | xfs_mount_t *mp, | |
266 | void __user *arg, | |
267 | struct file *parfilp, | |
268 | struct inode *parinode) | |
269 | { | |
270 | int error; | |
271 | int new_fd; | |
272 | int permflag; | |
273 | struct file *filp; | |
274 | struct inode *inode; | |
275 | struct dentry *dentry; | |
67fcaa73 | 276 | bhv_vnode_t *vp; |
1da177e4 LT |
277 | xfs_fsop_handlereq_t hreq; |
278 | ||
279 | if (!capable(CAP_SYS_ADMIN)) | |
280 | return -XFS_ERROR(EPERM); | |
281 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) | |
282 | return -XFS_ERROR(EFAULT); | |
283 | ||
284 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode); | |
285 | if (error) | |
286 | return -error; | |
287 | ||
288 | /* Restrict xfs_open_by_handle to directories & regular files. */ | |
289 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { | |
290 | iput(inode); | |
291 | return -XFS_ERROR(EINVAL); | |
292 | } | |
293 | ||
294 | #if BITS_PER_LONG != 32 | |
295 | hreq.oflags |= O_LARGEFILE; | |
296 | #endif | |
297 | /* Put open permission in namei format. */ | |
298 | permflag = hreq.oflags; | |
299 | if ((permflag+1) & O_ACCMODE) | |
300 | permflag++; | |
301 | if (permflag & O_TRUNC) | |
302 | permflag |= 2; | |
303 | ||
304 | if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && | |
305 | (permflag & FMODE_WRITE) && IS_APPEND(inode)) { | |
306 | iput(inode); | |
307 | return -XFS_ERROR(EPERM); | |
308 | } | |
309 | ||
310 | if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) { | |
311 | iput(inode); | |
312 | return -XFS_ERROR(EACCES); | |
313 | } | |
314 | ||
315 | /* Can't write directories. */ | |
316 | if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) { | |
317 | iput(inode); | |
318 | return -XFS_ERROR(EISDIR); | |
319 | } | |
320 | ||
321 | if ((new_fd = get_unused_fd()) < 0) { | |
322 | iput(inode); | |
323 | return new_fd; | |
324 | } | |
325 | ||
326 | dentry = d_alloc_anon(inode); | |
327 | if (dentry == NULL) { | |
328 | iput(inode); | |
329 | put_unused_fd(new_fd); | |
330 | return -XFS_ERROR(ENOMEM); | |
331 | } | |
332 | ||
333 | /* Ensure umount returns EBUSY on umounts while this file is open. */ | |
e678fb0d | 334 | mntget(parfilp->f_path.mnt); |
1da177e4 LT |
335 | |
336 | /* Create file pointer. */ | |
e678fb0d | 337 | filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags); |
1da177e4 LT |
338 | if (IS_ERR(filp)) { |
339 | put_unused_fd(new_fd); | |
340 | return -XFS_ERROR(-PTR_ERR(filp)); | |
341 | } | |
2e2e7bb1 VA |
342 | if (inode->i_mode & S_IFREG) { |
343 | /* invisible operation should not change atime */ | |
344 | filp->f_flags |= O_NOATIME; | |
3562fd45 | 345 | filp->f_op = &xfs_invis_file_operations; |
2e2e7bb1 | 346 | } |
1da177e4 LT |
347 | |
348 | fd_install(new_fd, filp); | |
349 | return new_fd; | |
350 | } | |
351 | ||
804c83c3 CH |
352 | /* |
353 | * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's | |
354 | * unused first argument. | |
355 | */ | |
356 | STATIC int | |
357 | do_readlink( | |
358 | char __user *buffer, | |
359 | int buflen, | |
360 | const char *link) | |
361 | { | |
362 | int len; | |
363 | ||
364 | len = PTR_ERR(link); | |
365 | if (IS_ERR(link)) | |
366 | goto out; | |
367 | ||
368 | len = strlen(link); | |
369 | if (len > (unsigned) buflen) | |
370 | len = buflen; | |
371 | if (copy_to_user(buffer, link, len)) | |
372 | len = -EFAULT; | |
373 | out: | |
374 | return len; | |
375 | } | |
376 | ||
377 | ||
1da177e4 LT |
378 | STATIC int |
379 | xfs_readlink_by_handle( | |
380 | xfs_mount_t *mp, | |
381 | void __user *arg, | |
1da177e4 LT |
382 | struct inode *parinode) |
383 | { | |
1da177e4 LT |
384 | struct inode *inode; |
385 | xfs_fsop_handlereq_t hreq; | |
67fcaa73 | 386 | bhv_vnode_t *vp; |
1da177e4 | 387 | __u32 olen; |
804c83c3 CH |
388 | void *link; |
389 | int error; | |
1da177e4 LT |
390 | |
391 | if (!capable(CAP_SYS_ADMIN)) | |
392 | return -XFS_ERROR(EPERM); | |
393 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) | |
394 | return -XFS_ERROR(EFAULT); | |
395 | ||
396 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode); | |
397 | if (error) | |
398 | return -error; | |
399 | ||
400 | /* Restrict this handle operation to symlinks only. */ | |
0432dab2 | 401 | if (!S_ISLNK(inode->i_mode)) { |
804c83c3 CH |
402 | error = -XFS_ERROR(EINVAL); |
403 | goto out_iput; | |
1da177e4 LT |
404 | } |
405 | ||
406 | if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) { | |
804c83c3 CH |
407 | error = -XFS_ERROR(EFAULT); |
408 | goto out_iput; | |
1da177e4 | 409 | } |
1da177e4 | 410 | |
804c83c3 CH |
411 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
412 | if (!link) | |
413 | goto out_iput; | |
1da177e4 | 414 | |
804c83c3 | 415 | error = -bhv_vop_readlink(vp, link); |
67fcaa73 | 416 | if (error) |
804c83c3 CH |
417 | goto out_kfree; |
418 | error = do_readlink(hreq.ohandle, olen, link); | |
419 | if (error) | |
420 | goto out_kfree; | |
67fcaa73 | 421 | |
804c83c3 CH |
422 | out_kfree: |
423 | kfree(link); | |
424 | out_iput: | |
425 | iput(inode); | |
426 | return error; | |
1da177e4 LT |
427 | } |
428 | ||
429 | STATIC int | |
430 | xfs_fssetdm_by_handle( | |
431 | xfs_mount_t *mp, | |
432 | void __user *arg, | |
1da177e4 LT |
433 | struct inode *parinode) |
434 | { | |
435 | int error; | |
436 | struct fsdmidata fsd; | |
437 | xfs_fsop_setdm_handlereq_t dmhreq; | |
438 | struct inode *inode; | |
439 | bhv_desc_t *bdp; | |
67fcaa73 | 440 | bhv_vnode_t *vp; |
1da177e4 LT |
441 | |
442 | if (!capable(CAP_MKNOD)) | |
443 | return -XFS_ERROR(EPERM); | |
444 | if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) | |
445 | return -XFS_ERROR(EFAULT); | |
446 | ||
447 | error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &vp, &inode); | |
448 | if (error) | |
449 | return -error; | |
450 | ||
451 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) { | |
452 | VN_RELE(vp); | |
453 | return -XFS_ERROR(EPERM); | |
454 | } | |
455 | ||
456 | if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { | |
457 | VN_RELE(vp); | |
458 | return -XFS_ERROR(EFAULT); | |
459 | } | |
460 | ||
461 | bdp = bhv_base_unlocked(VN_BHV_HEAD(vp)); | |
462 | error = xfs_set_dmattrs(bdp, fsd.fsd_dmevmask, fsd.fsd_dmstate, NULL); | |
463 | ||
464 | VN_RELE(vp); | |
465 | if (error) | |
466 | return -error; | |
467 | return 0; | |
468 | } | |
469 | ||
470 | STATIC int | |
471 | xfs_attrlist_by_handle( | |
472 | xfs_mount_t *mp, | |
473 | void __user *arg, | |
1da177e4 LT |
474 | struct inode *parinode) |
475 | { | |
476 | int error; | |
477 | attrlist_cursor_kern_t *cursor; | |
478 | xfs_fsop_attrlist_handlereq_t al_hreq; | |
479 | struct inode *inode; | |
67fcaa73 | 480 | bhv_vnode_t *vp; |
1da177e4 LT |
481 | char *kbuf; |
482 | ||
483 | if (!capable(CAP_SYS_ADMIN)) | |
484 | return -XFS_ERROR(EPERM); | |
485 | if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) | |
486 | return -XFS_ERROR(EFAULT); | |
487 | if (al_hreq.buflen > XATTR_LIST_MAX) | |
488 | return -XFS_ERROR(EINVAL); | |
489 | ||
490 | error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq, | |
491 | &vp, &inode); | |
492 | if (error) | |
493 | goto out; | |
494 | ||
495 | kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); | |
496 | if (!kbuf) | |
497 | goto out_vn_rele; | |
498 | ||
499 | cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; | |
67fcaa73 NS |
500 | error = bhv_vop_attr_list(vp, kbuf, al_hreq.buflen, al_hreq.flags, |
501 | cursor, NULL); | |
1da177e4 LT |
502 | if (error) |
503 | goto out_kfree; | |
504 | ||
505 | if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) | |
506 | error = -EFAULT; | |
507 | ||
508 | out_kfree: | |
509 | kfree(kbuf); | |
510 | out_vn_rele: | |
511 | VN_RELE(vp); | |
512 | out: | |
513 | return -error; | |
514 | } | |
515 | ||
516 | STATIC int | |
517 | xfs_attrmulti_attr_get( | |
67fcaa73 | 518 | bhv_vnode_t *vp, |
1da177e4 LT |
519 | char *name, |
520 | char __user *ubuf, | |
521 | __uint32_t *len, | |
522 | __uint32_t flags) | |
523 | { | |
524 | char *kbuf; | |
525 | int error = EFAULT; | |
526 | ||
527 | if (*len > XATTR_SIZE_MAX) | |
528 | return EINVAL; | |
529 | kbuf = kmalloc(*len, GFP_KERNEL); | |
530 | if (!kbuf) | |
531 | return ENOMEM; | |
532 | ||
67fcaa73 | 533 | error = bhv_vop_attr_get(vp, name, kbuf, len, flags, NULL); |
1da177e4 LT |
534 | if (error) |
535 | goto out_kfree; | |
536 | ||
537 | if (copy_to_user(ubuf, kbuf, *len)) | |
538 | error = EFAULT; | |
539 | ||
540 | out_kfree: | |
541 | kfree(kbuf); | |
542 | return error; | |
543 | } | |
544 | ||
545 | STATIC int | |
546 | xfs_attrmulti_attr_set( | |
67fcaa73 | 547 | bhv_vnode_t *vp, |
1da177e4 LT |
548 | char *name, |
549 | const char __user *ubuf, | |
550 | __uint32_t len, | |
551 | __uint32_t flags) | |
552 | { | |
553 | char *kbuf; | |
554 | int error = EFAULT; | |
555 | ||
3542c6e1 CH |
556 | if (IS_RDONLY(&vp->v_inode)) |
557 | return -EROFS; | |
1da177e4 LT |
558 | if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode)) |
559 | return EPERM; | |
560 | if (len > XATTR_SIZE_MAX) | |
561 | return EINVAL; | |
562 | ||
563 | kbuf = kmalloc(len, GFP_KERNEL); | |
564 | if (!kbuf) | |
565 | return ENOMEM; | |
566 | ||
567 | if (copy_from_user(kbuf, ubuf, len)) | |
568 | goto out_kfree; | |
569 | ||
67fcaa73 | 570 | error = bhv_vop_attr_set(vp, name, kbuf, len, flags, NULL); |
1da177e4 LT |
571 | |
572 | out_kfree: | |
573 | kfree(kbuf); | |
574 | return error; | |
575 | } | |
576 | ||
577 | STATIC int | |
578 | xfs_attrmulti_attr_remove( | |
67fcaa73 | 579 | bhv_vnode_t *vp, |
1da177e4 LT |
580 | char *name, |
581 | __uint32_t flags) | |
582 | { | |
3542c6e1 CH |
583 | if (IS_RDONLY(&vp->v_inode)) |
584 | return -EROFS; | |
1da177e4 LT |
585 | if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode)) |
586 | return EPERM; | |
67fcaa73 | 587 | return bhv_vop_attr_remove(vp, name, flags, NULL); |
1da177e4 LT |
588 | } |
589 | ||
590 | STATIC int | |
591 | xfs_attrmulti_by_handle( | |
592 | xfs_mount_t *mp, | |
593 | void __user *arg, | |
1da177e4 LT |
594 | struct inode *parinode) |
595 | { | |
596 | int error; | |
597 | xfs_attr_multiop_t *ops; | |
598 | xfs_fsop_attrmulti_handlereq_t am_hreq; | |
599 | struct inode *inode; | |
67fcaa73 | 600 | bhv_vnode_t *vp; |
1da177e4 LT |
601 | unsigned int i, size; |
602 | char *attr_name; | |
603 | ||
604 | if (!capable(CAP_SYS_ADMIN)) | |
605 | return -XFS_ERROR(EPERM); | |
606 | if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) | |
607 | return -XFS_ERROR(EFAULT); | |
608 | ||
609 | error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &vp, &inode); | |
610 | if (error) | |
611 | goto out; | |
612 | ||
613 | error = E2BIG; | |
614 | size = am_hreq.opcount * sizeof(attr_multiop_t); | |
615 | if (!size || size > 16 * PAGE_SIZE) | |
616 | goto out_vn_rele; | |
617 | ||
618 | error = ENOMEM; | |
619 | ops = kmalloc(size, GFP_KERNEL); | |
620 | if (!ops) | |
621 | goto out_vn_rele; | |
622 | ||
623 | error = EFAULT; | |
624 | if (copy_from_user(ops, am_hreq.ops, size)) | |
625 | goto out_kfree_ops; | |
626 | ||
627 | attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); | |
628 | if (!attr_name) | |
629 | goto out_kfree_ops; | |
630 | ||
631 | ||
632 | error = 0; | |
633 | for (i = 0; i < am_hreq.opcount; i++) { | |
634 | ops[i].am_error = strncpy_from_user(attr_name, | |
635 | ops[i].am_attrname, MAXNAMELEN); | |
636 | if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) | |
637 | error = -ERANGE; | |
638 | if (ops[i].am_error < 0) | |
639 | break; | |
640 | ||
641 | switch (ops[i].am_opcode) { | |
642 | case ATTR_OP_GET: | |
643 | ops[i].am_error = xfs_attrmulti_attr_get(vp, | |
644 | attr_name, ops[i].am_attrvalue, | |
645 | &ops[i].am_length, ops[i].am_flags); | |
646 | break; | |
647 | case ATTR_OP_SET: | |
648 | ops[i].am_error = xfs_attrmulti_attr_set(vp, | |
649 | attr_name, ops[i].am_attrvalue, | |
650 | ops[i].am_length, ops[i].am_flags); | |
651 | break; | |
652 | case ATTR_OP_REMOVE: | |
653 | ops[i].am_error = xfs_attrmulti_attr_remove(vp, | |
654 | attr_name, ops[i].am_flags); | |
655 | break; | |
656 | default: | |
657 | ops[i].am_error = EINVAL; | |
658 | } | |
659 | } | |
660 | ||
661 | if (copy_to_user(am_hreq.ops, ops, size)) | |
662 | error = XFS_ERROR(EFAULT); | |
663 | ||
664 | kfree(attr_name); | |
665 | out_kfree_ops: | |
666 | kfree(ops); | |
667 | out_vn_rele: | |
668 | VN_RELE(vp); | |
669 | out: | |
670 | return -error; | |
671 | } | |
672 | ||
673 | /* prototypes for a few of the stack-hungry cases that have | |
674 | * their own functions. Functions are defined after their use | |
675 | * so gcc doesn't get fancy and inline them with -03 */ | |
676 | ||
677 | STATIC int | |
678 | xfs_ioc_space( | |
679 | bhv_desc_t *bdp, | |
f37ea149 | 680 | struct inode *inode, |
1da177e4 LT |
681 | struct file *filp, |
682 | int flags, | |
683 | unsigned int cmd, | |
684 | void __user *arg); | |
685 | ||
686 | STATIC int | |
687 | xfs_ioc_bulkstat( | |
688 | xfs_mount_t *mp, | |
689 | unsigned int cmd, | |
690 | void __user *arg); | |
691 | ||
692 | STATIC int | |
693 | xfs_ioc_fsgeometry_v1( | |
694 | xfs_mount_t *mp, | |
695 | void __user *arg); | |
696 | ||
697 | STATIC int | |
698 | xfs_ioc_fsgeometry( | |
699 | xfs_mount_t *mp, | |
700 | void __user *arg); | |
701 | ||
702 | STATIC int | |
703 | xfs_ioc_xattr( | |
67fcaa73 | 704 | bhv_vnode_t *vp, |
1da177e4 LT |
705 | xfs_inode_t *ip, |
706 | struct file *filp, | |
707 | unsigned int cmd, | |
708 | void __user *arg); | |
709 | ||
710 | STATIC int | |
711 | xfs_ioc_getbmap( | |
712 | bhv_desc_t *bdp, | |
1da177e4 LT |
713 | int flags, |
714 | unsigned int cmd, | |
715 | void __user *arg); | |
716 | ||
717 | STATIC int | |
718 | xfs_ioc_getbmapx( | |
719 | bhv_desc_t *bdp, | |
720 | void __user *arg); | |
721 | ||
722 | int | |
723 | xfs_ioctl( | |
724 | bhv_desc_t *bdp, | |
725 | struct inode *inode, | |
726 | struct file *filp, | |
727 | int ioflags, | |
728 | unsigned int cmd, | |
729 | void __user *arg) | |
730 | { | |
731 | int error; | |
67fcaa73 | 732 | bhv_vnode_t *vp; |
1da177e4 LT |
733 | xfs_inode_t *ip; |
734 | xfs_mount_t *mp; | |
735 | ||
ec86dc02 | 736 | vp = vn_from_inode(inode); |
1da177e4 LT |
737 | |
738 | vn_trace_entry(vp, "xfs_ioctl", (inst_t *)__return_address); | |
739 | ||
740 | ip = XFS_BHVTOI(bdp); | |
741 | mp = ip->i_mount; | |
742 | ||
743 | switch (cmd) { | |
744 | ||
745 | case XFS_IOC_ALLOCSP: | |
746 | case XFS_IOC_FREESP: | |
747 | case XFS_IOC_RESVSP: | |
748 | case XFS_IOC_UNRESVSP: | |
749 | case XFS_IOC_ALLOCSP64: | |
750 | case XFS_IOC_FREESP64: | |
751 | case XFS_IOC_RESVSP64: | |
752 | case XFS_IOC_UNRESVSP64: | |
753 | /* | |
754 | * Only allow the sys admin to reserve space unless | |
755 | * unwritten extents are enabled. | |
756 | */ | |
757 | if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) && | |
758 | !capable(CAP_SYS_ADMIN)) | |
759 | return -EPERM; | |
760 | ||
f37ea149 | 761 | return xfs_ioc_space(bdp, inode, filp, ioflags, cmd, arg); |
1da177e4 LT |
762 | |
763 | case XFS_IOC_DIOINFO: { | |
764 | struct dioattr da; | |
765 | xfs_buftarg_t *target = | |
766 | (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ? | |
767 | mp->m_rtdev_targp : mp->m_ddev_targp; | |
768 | ||
ce8e922c | 769 | da.d_mem = da.d_miniosz = 1 << target->bt_sshift; |
0d14824c | 770 | da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); |
1da177e4 LT |
771 | |
772 | if (copy_to_user(arg, &da, sizeof(da))) | |
773 | return -XFS_ERROR(EFAULT); | |
774 | return 0; | |
775 | } | |
776 | ||
777 | case XFS_IOC_FSBULKSTAT_SINGLE: | |
778 | case XFS_IOC_FSBULKSTAT: | |
779 | case XFS_IOC_FSINUMBERS: | |
780 | return xfs_ioc_bulkstat(mp, cmd, arg); | |
781 | ||
782 | case XFS_IOC_FSGEOMETRY_V1: | |
783 | return xfs_ioc_fsgeometry_v1(mp, arg); | |
784 | ||
785 | case XFS_IOC_FSGEOMETRY: | |
786 | return xfs_ioc_fsgeometry(mp, arg); | |
787 | ||
788 | case XFS_IOC_GETVERSION: | |
87395deb AD |
789 | return put_user(inode->i_generation, (int __user *)arg); |
790 | ||
1da177e4 LT |
791 | case XFS_IOC_GETXFLAGS: |
792 | case XFS_IOC_SETXFLAGS: | |
793 | case XFS_IOC_FSGETXATTR: | |
794 | case XFS_IOC_FSSETXATTR: | |
795 | case XFS_IOC_FSGETXATTRA: | |
796 | return xfs_ioc_xattr(vp, ip, filp, cmd, arg); | |
797 | ||
798 | case XFS_IOC_FSSETDM: { | |
799 | struct fsdmidata dmi; | |
800 | ||
801 | if (copy_from_user(&dmi, arg, sizeof(dmi))) | |
802 | return -XFS_ERROR(EFAULT); | |
803 | ||
804 | error = xfs_set_dmattrs(bdp, dmi.fsd_dmevmask, dmi.fsd_dmstate, | |
805 | NULL); | |
806 | return -error; | |
807 | } | |
808 | ||
809 | case XFS_IOC_GETBMAP: | |
810 | case XFS_IOC_GETBMAPA: | |
5180602e | 811 | return xfs_ioc_getbmap(bdp, ioflags, cmd, arg); |
1da177e4 LT |
812 | |
813 | case XFS_IOC_GETBMAPX: | |
814 | return xfs_ioc_getbmapx(bdp, arg); | |
815 | ||
816 | case XFS_IOC_FD_TO_HANDLE: | |
817 | case XFS_IOC_PATH_TO_HANDLE: | |
818 | case XFS_IOC_PATH_TO_FSHANDLE: | |
819 | return xfs_find_handle(cmd, arg); | |
820 | ||
821 | case XFS_IOC_OPEN_BY_HANDLE: | |
822 | return xfs_open_by_handle(mp, arg, filp, inode); | |
823 | ||
824 | case XFS_IOC_FSSETDM_BY_HANDLE: | |
5180602e | 825 | return xfs_fssetdm_by_handle(mp, arg, inode); |
1da177e4 LT |
826 | |
827 | case XFS_IOC_READLINK_BY_HANDLE: | |
5180602e | 828 | return xfs_readlink_by_handle(mp, arg, inode); |
1da177e4 LT |
829 | |
830 | case XFS_IOC_ATTRLIST_BY_HANDLE: | |
5180602e | 831 | return xfs_attrlist_by_handle(mp, arg, inode); |
1da177e4 LT |
832 | |
833 | case XFS_IOC_ATTRMULTI_BY_HANDLE: | |
5180602e | 834 | return xfs_attrmulti_by_handle(mp, arg, inode); |
1da177e4 LT |
835 | |
836 | case XFS_IOC_SWAPEXT: { | |
837 | error = xfs_swapext((struct xfs_swapext __user *)arg); | |
838 | return -error; | |
839 | } | |
840 | ||
841 | case XFS_IOC_FSCOUNTS: { | |
842 | xfs_fsop_counts_t out; | |
843 | ||
844 | error = xfs_fs_counts(mp, &out); | |
845 | if (error) | |
846 | return -error; | |
847 | ||
848 | if (copy_to_user(arg, &out, sizeof(out))) | |
849 | return -XFS_ERROR(EFAULT); | |
850 | return 0; | |
851 | } | |
852 | ||
853 | case XFS_IOC_SET_RESBLKS: { | |
854 | xfs_fsop_resblks_t inout; | |
855 | __uint64_t in; | |
856 | ||
857 | if (!capable(CAP_SYS_ADMIN)) | |
858 | return -EPERM; | |
859 | ||
860 | if (copy_from_user(&inout, arg, sizeof(inout))) | |
861 | return -XFS_ERROR(EFAULT); | |
862 | ||
863 | /* input parameter is passed in resblks field of structure */ | |
864 | in = inout.resblks; | |
865 | error = xfs_reserve_blocks(mp, &in, &inout); | |
866 | if (error) | |
867 | return -error; | |
868 | ||
869 | if (copy_to_user(arg, &inout, sizeof(inout))) | |
870 | return -XFS_ERROR(EFAULT); | |
871 | return 0; | |
872 | } | |
873 | ||
874 | case XFS_IOC_GET_RESBLKS: { | |
875 | xfs_fsop_resblks_t out; | |
876 | ||
877 | if (!capable(CAP_SYS_ADMIN)) | |
878 | return -EPERM; | |
879 | ||
880 | error = xfs_reserve_blocks(mp, NULL, &out); | |
881 | if (error) | |
882 | return -error; | |
883 | ||
884 | if (copy_to_user(arg, &out, sizeof(out))) | |
885 | return -XFS_ERROR(EFAULT); | |
886 | ||
887 | return 0; | |
888 | } | |
889 | ||
890 | case XFS_IOC_FSGROWFSDATA: { | |
891 | xfs_growfs_data_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_data(mp, &in); | |
900 | return -error; | |
901 | } | |
902 | ||
903 | case XFS_IOC_FSGROWFSLOG: { | |
904 | xfs_growfs_log_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_log(mp, &in); | |
913 | return -error; | |
914 | } | |
915 | ||
916 | case XFS_IOC_FSGROWFSRT: { | |
917 | xfs_growfs_rt_t in; | |
918 | ||
919 | if (!capable(CAP_SYS_ADMIN)) | |
920 | return -EPERM; | |
921 | ||
922 | if (copy_from_user(&in, arg, sizeof(in))) | |
923 | return -XFS_ERROR(EFAULT); | |
924 | ||
925 | error = xfs_growfs_rt(mp, &in); | |
926 | return -error; | |
927 | } | |
928 | ||
929 | case XFS_IOC_FREEZE: | |
930 | if (!capable(CAP_SYS_ADMIN)) | |
931 | return -EPERM; | |
932 | ||
933 | if (inode->i_sb->s_frozen == SB_UNFROZEN) | |
934 | freeze_bdev(inode->i_sb->s_bdev); | |
935 | return 0; | |
936 | ||
937 | case XFS_IOC_THAW: | |
938 | if (!capable(CAP_SYS_ADMIN)) | |
939 | return -EPERM; | |
940 | if (inode->i_sb->s_frozen != SB_UNFROZEN) | |
941 | thaw_bdev(inode->i_sb->s_bdev, inode->i_sb); | |
942 | return 0; | |
943 | ||
944 | case XFS_IOC_GOINGDOWN: { | |
945 | __uint32_t in; | |
946 | ||
947 | if (!capable(CAP_SYS_ADMIN)) | |
948 | return -EPERM; | |
949 | ||
950 | if (get_user(in, (__uint32_t __user *)arg)) | |
951 | return -XFS_ERROR(EFAULT); | |
952 | ||
953 | error = xfs_fs_goingdown(mp, in); | |
954 | return -error; | |
955 | } | |
956 | ||
957 | case XFS_IOC_ERROR_INJECTION: { | |
958 | xfs_error_injection_t in; | |
959 | ||
960 | if (!capable(CAP_SYS_ADMIN)) | |
961 | return -EPERM; | |
962 | ||
963 | if (copy_from_user(&in, arg, sizeof(in))) | |
964 | return -XFS_ERROR(EFAULT); | |
965 | ||
966 | error = xfs_errortag_add(in.errtag, mp); | |
967 | return -error; | |
968 | } | |
969 | ||
970 | case XFS_IOC_ERROR_CLEARALL: | |
971 | if (!capable(CAP_SYS_ADMIN)) | |
972 | return -EPERM; | |
973 | ||
974 | error = xfs_errortag_clearall(mp); | |
975 | return -error; | |
976 | ||
977 | default: | |
978 | return -ENOTTY; | |
979 | } | |
980 | } | |
981 | ||
982 | STATIC int | |
983 | xfs_ioc_space( | |
984 | bhv_desc_t *bdp, | |
f37ea149 | 985 | struct inode *inode, |
1da177e4 LT |
986 | struct file *filp, |
987 | int ioflags, | |
988 | unsigned int cmd, | |
989 | void __user *arg) | |
990 | { | |
991 | xfs_flock64_t bf; | |
992 | int attr_flags = 0; | |
993 | int error; | |
994 | ||
f37ea149 | 995 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) |
1da177e4 LT |
996 | return -XFS_ERROR(EPERM); |
997 | ||
ad4a8ac4 | 998 | if (!(filp->f_mode & FMODE_WRITE)) |
1da177e4 LT |
999 | return -XFS_ERROR(EBADF); |
1000 | ||
f37ea149 | 1001 | if (!S_ISREG(inode->i_mode)) |
1da177e4 LT |
1002 | return -XFS_ERROR(EINVAL); |
1003 | ||
1004 | if (copy_from_user(&bf, arg, sizeof(bf))) | |
1005 | return -XFS_ERROR(EFAULT); | |
1006 | ||
1007 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) | |
1008 | attr_flags |= ATTR_NONBLOCK; | |
1009 | if (ioflags & IO_INVIS) | |
1010 | attr_flags |= ATTR_DMI; | |
1011 | ||
1012 | error = xfs_change_file_space(bdp, cmd, &bf, filp->f_pos, | |
1013 | NULL, attr_flags); | |
1014 | return -error; | |
1015 | } | |
1016 | ||
1017 | STATIC int | |
1018 | xfs_ioc_bulkstat( | |
1019 | xfs_mount_t *mp, | |
1020 | unsigned int cmd, | |
1021 | void __user *arg) | |
1022 | { | |
1023 | xfs_fsop_bulkreq_t bulkreq; | |
1024 | int count; /* # of records returned */ | |
1025 | xfs_ino_t inlast; /* last inode number */ | |
1026 | int done; | |
1027 | int error; | |
1028 | ||
1029 | /* done = 1 if there are more stats to get and if bulkstat */ | |
1030 | /* should be called again (unused here, but used in dmapi) */ | |
1031 | ||
1032 | if (!capable(CAP_SYS_ADMIN)) | |
1033 | return -EPERM; | |
1034 | ||
1035 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1036 | return -XFS_ERROR(EIO); | |
1037 | ||
1038 | if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) | |
1039 | return -XFS_ERROR(EFAULT); | |
1040 | ||
1041 | if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) | |
1042 | return -XFS_ERROR(EFAULT); | |
1043 | ||
1044 | if ((count = bulkreq.icount) <= 0) | |
1045 | return -XFS_ERROR(EINVAL); | |
1046 | ||
1047 | if (cmd == XFS_IOC_FSINUMBERS) | |
1048 | error = xfs_inumbers(mp, &inlast, &count, | |
faa63e95 | 1049 | bulkreq.ubuffer, xfs_inumbers_fmt); |
1da177e4 LT |
1050 | else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
1051 | error = xfs_bulkstat_single(mp, &inlast, | |
1052 | bulkreq.ubuffer, &done); | |
1053 | else { /* XFS_IOC_FSBULKSTAT */ | |
1054 | if (count == 1 && inlast != 0) { | |
1055 | inlast++; | |
1056 | error = xfs_bulkstat_single(mp, &inlast, | |
1057 | bulkreq.ubuffer, &done); | |
1058 | } else { | |
1059 | error = xfs_bulkstat(mp, &inlast, &count, | |
1060 | (bulkstat_one_pf)xfs_bulkstat_one, NULL, | |
1061 | sizeof(xfs_bstat_t), bulkreq.ubuffer, | |
1062 | BULKSTAT_FG_QUICK, &done); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | if (error) | |
1067 | return -error; | |
1068 | ||
1069 | if (bulkreq.ocount != NULL) { | |
1070 | if (copy_to_user(bulkreq.lastip, &inlast, | |
1071 | sizeof(xfs_ino_t))) | |
1072 | return -XFS_ERROR(EFAULT); | |
1073 | ||
1074 | if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) | |
1075 | return -XFS_ERROR(EFAULT); | |
1076 | } | |
1077 | ||
1078 | return 0; | |
1079 | } | |
1080 | ||
1081 | STATIC int | |
1082 | xfs_ioc_fsgeometry_v1( | |
1083 | xfs_mount_t *mp, | |
1084 | void __user *arg) | |
1085 | { | |
1086 | xfs_fsop_geom_v1_t fsgeo; | |
1087 | int error; | |
1088 | ||
1089 | error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3); | |
1090 | if (error) | |
1091 | return -error; | |
1092 | ||
1093 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) | |
1094 | return -XFS_ERROR(EFAULT); | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | STATIC int | |
1099 | xfs_ioc_fsgeometry( | |
1100 | xfs_mount_t *mp, | |
1101 | void __user *arg) | |
1102 | { | |
1103 | xfs_fsop_geom_t fsgeo; | |
1104 | int error; | |
1105 | ||
1106 | error = xfs_fs_geometry(mp, &fsgeo, 4); | |
1107 | if (error) | |
1108 | return -error; | |
1109 | ||
1110 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) | |
1111 | return -XFS_ERROR(EFAULT); | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * Linux extended inode flags interface. | |
1117 | */ | |
1da177e4 LT |
1118 | |
1119 | STATIC unsigned int | |
1120 | xfs_merge_ioc_xflags( | |
1121 | unsigned int flags, | |
1122 | unsigned int start) | |
1123 | { | |
1124 | unsigned int xflags = start; | |
1125 | ||
39058a0e | 1126 | if (flags & FS_IMMUTABLE_FL) |
1da177e4 LT |
1127 | xflags |= XFS_XFLAG_IMMUTABLE; |
1128 | else | |
1129 | xflags &= ~XFS_XFLAG_IMMUTABLE; | |
39058a0e | 1130 | if (flags & FS_APPEND_FL) |
1da177e4 LT |
1131 | xflags |= XFS_XFLAG_APPEND; |
1132 | else | |
1133 | xflags &= ~XFS_XFLAG_APPEND; | |
39058a0e | 1134 | if (flags & FS_SYNC_FL) |
1da177e4 LT |
1135 | xflags |= XFS_XFLAG_SYNC; |
1136 | else | |
1137 | xflags &= ~XFS_XFLAG_SYNC; | |
39058a0e | 1138 | if (flags & FS_NOATIME_FL) |
1da177e4 LT |
1139 | xflags |= XFS_XFLAG_NOATIME; |
1140 | else | |
1141 | xflags &= ~XFS_XFLAG_NOATIME; | |
39058a0e | 1142 | if (flags & FS_NODUMP_FL) |
1da177e4 LT |
1143 | xflags |= XFS_XFLAG_NODUMP; |
1144 | else | |
1145 | xflags &= ~XFS_XFLAG_NODUMP; | |
1146 | ||
1147 | return xflags; | |
1148 | } | |
1149 | ||
1150 | STATIC unsigned int | |
1151 | xfs_di2lxflags( | |
1152 | __uint16_t di_flags) | |
1153 | { | |
1154 | unsigned int flags = 0; | |
1155 | ||
1156 | if (di_flags & XFS_DIFLAG_IMMUTABLE) | |
39058a0e | 1157 | flags |= FS_IMMUTABLE_FL; |
1da177e4 | 1158 | if (di_flags & XFS_DIFLAG_APPEND) |
39058a0e | 1159 | flags |= FS_APPEND_FL; |
1da177e4 | 1160 | if (di_flags & XFS_DIFLAG_SYNC) |
39058a0e | 1161 | flags |= FS_SYNC_FL; |
1da177e4 | 1162 | if (di_flags & XFS_DIFLAG_NOATIME) |
39058a0e | 1163 | flags |= FS_NOATIME_FL; |
1da177e4 | 1164 | if (di_flags & XFS_DIFLAG_NODUMP) |
39058a0e | 1165 | flags |= FS_NODUMP_FL; |
1da177e4 LT |
1166 | return flags; |
1167 | } | |
1168 | ||
1169 | STATIC int | |
1170 | xfs_ioc_xattr( | |
67fcaa73 | 1171 | bhv_vnode_t *vp, |
1da177e4 LT |
1172 | xfs_inode_t *ip, |
1173 | struct file *filp, | |
1174 | unsigned int cmd, | |
1175 | void __user *arg) | |
1176 | { | |
1177 | struct fsxattr fa; | |
8285fb58 | 1178 | struct bhv_vattr *vattr; |
220b5284 | 1179 | int error = 0; |
1da177e4 LT |
1180 | int attr_flags; |
1181 | unsigned int flags; | |
1182 | ||
220b5284 NS |
1183 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
1184 | if (unlikely(!vattr)) | |
1185 | return -ENOMEM; | |
1186 | ||
1da177e4 LT |
1187 | switch (cmd) { |
1188 | case XFS_IOC_FSGETXATTR: { | |
220b5284 NS |
1189 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \ |
1190 | XFS_AT_NEXTENTS | XFS_AT_PROJID; | |
67fcaa73 | 1191 | error = bhv_vop_getattr(vp, vattr, 0, NULL); |
220b5284 NS |
1192 | if (unlikely(error)) { |
1193 | error = -error; | |
1194 | break; | |
1195 | } | |
1da177e4 | 1196 | |
220b5284 NS |
1197 | fa.fsx_xflags = vattr->va_xflags; |
1198 | fa.fsx_extsize = vattr->va_extsize; | |
1199 | fa.fsx_nextents = vattr->va_nextents; | |
1200 | fa.fsx_projid = vattr->va_projid; | |
1da177e4 | 1201 | |
220b5284 NS |
1202 | if (copy_to_user(arg, &fa, sizeof(fa))) { |
1203 | error = -EFAULT; | |
1204 | break; | |
1205 | } | |
1206 | break; | |
1da177e4 LT |
1207 | } |
1208 | ||
1209 | case XFS_IOC_FSSETXATTR: { | |
220b5284 NS |
1210 | if (copy_from_user(&fa, arg, sizeof(fa))) { |
1211 | error = -EFAULT; | |
1212 | break; | |
1213 | } | |
1da177e4 LT |
1214 | |
1215 | attr_flags = 0; | |
1216 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) | |
1217 | attr_flags |= ATTR_NONBLOCK; | |
1218 | ||
220b5284 NS |
1219 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | XFS_AT_PROJID; |
1220 | vattr->va_xflags = fa.fsx_xflags; | |
1221 | vattr->va_extsize = fa.fsx_extsize; | |
1222 | vattr->va_projid = fa.fsx_projid; | |
1da177e4 | 1223 | |
67fcaa73 | 1224 | error = bhv_vop_setattr(vp, vattr, attr_flags, NULL); |
220b5284 NS |
1225 | if (likely(!error)) |
1226 | __vn_revalidate(vp, vattr); /* update flags */ | |
1227 | error = -error; | |
1228 | break; | |
1da177e4 LT |
1229 | } |
1230 | ||
1231 | case XFS_IOC_FSGETXATTRA: { | |
220b5284 NS |
1232 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \ |
1233 | XFS_AT_ANEXTENTS | XFS_AT_PROJID; | |
67fcaa73 | 1234 | error = bhv_vop_getattr(vp, vattr, 0, NULL); |
220b5284 NS |
1235 | if (unlikely(error)) { |
1236 | error = -error; | |
1237 | break; | |
1238 | } | |
1da177e4 | 1239 | |
220b5284 NS |
1240 | fa.fsx_xflags = vattr->va_xflags; |
1241 | fa.fsx_extsize = vattr->va_extsize; | |
1242 | fa.fsx_nextents = vattr->va_anextents; | |
1243 | fa.fsx_projid = vattr->va_projid; | |
1da177e4 | 1244 | |
220b5284 NS |
1245 | if (copy_to_user(arg, &fa, sizeof(fa))) { |
1246 | error = -EFAULT; | |
1247 | break; | |
1248 | } | |
1249 | break; | |
1da177e4 LT |
1250 | } |
1251 | ||
1252 | case XFS_IOC_GETXFLAGS: { | |
1253 | flags = xfs_di2lxflags(ip->i_d.di_flags); | |
1254 | if (copy_to_user(arg, &flags, sizeof(flags))) | |
220b5284 NS |
1255 | error = -EFAULT; |
1256 | break; | |
1da177e4 LT |
1257 | } |
1258 | ||
1259 | case XFS_IOC_SETXFLAGS: { | |
220b5284 NS |
1260 | if (copy_from_user(&flags, arg, sizeof(flags))) { |
1261 | error = -EFAULT; | |
1262 | break; | |
1263 | } | |
1da177e4 | 1264 | |
39058a0e ES |
1265 | if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ |
1266 | FS_NOATIME_FL | FS_NODUMP_FL | \ | |
1267 | FS_SYNC_FL)) { | |
220b5284 NS |
1268 | error = -EOPNOTSUPP; |
1269 | break; | |
1270 | } | |
1da177e4 LT |
1271 | |
1272 | attr_flags = 0; | |
1273 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) | |
1274 | attr_flags |= ATTR_NONBLOCK; | |
1275 | ||
220b5284 NS |
1276 | vattr->va_mask = XFS_AT_XFLAGS; |
1277 | vattr->va_xflags = xfs_merge_ioc_xflags(flags, | |
1278 | xfs_ip2xflags(ip)); | |
1da177e4 | 1279 | |
67fcaa73 | 1280 | error = bhv_vop_setattr(vp, vattr, attr_flags, NULL); |
220b5284 NS |
1281 | if (likely(!error)) |
1282 | __vn_revalidate(vp, vattr); /* update flags */ | |
1283 | error = -error; | |
1284 | break; | |
1da177e4 LT |
1285 | } |
1286 | ||
1da177e4 | 1287 | default: |
220b5284 NS |
1288 | error = -ENOTTY; |
1289 | break; | |
1da177e4 | 1290 | } |
220b5284 NS |
1291 | |
1292 | kfree(vattr); | |
1293 | return error; | |
1da177e4 LT |
1294 | } |
1295 | ||
1296 | STATIC int | |
1297 | xfs_ioc_getbmap( | |
1298 | bhv_desc_t *bdp, | |
1da177e4 LT |
1299 | int ioflags, |
1300 | unsigned int cmd, | |
1301 | void __user *arg) | |
1302 | { | |
1303 | struct getbmap bm; | |
1304 | int iflags; | |
1305 | int error; | |
1306 | ||
1307 | if (copy_from_user(&bm, arg, sizeof(bm))) | |
1308 | return -XFS_ERROR(EFAULT); | |
1309 | ||
1310 | if (bm.bmv_count < 2) | |
1311 | return -XFS_ERROR(EINVAL); | |
1312 | ||
1313 | iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); | |
1314 | if (ioflags & IO_INVIS) | |
1315 | iflags |= BMV_IF_NO_DMAPI_READ; | |
1316 | ||
1317 | error = xfs_getbmap(bdp, &bm, (struct getbmap __user *)arg+1, iflags); | |
1318 | if (error) | |
1319 | return -error; | |
1320 | ||
1321 | if (copy_to_user(arg, &bm, sizeof(bm))) | |
1322 | return -XFS_ERROR(EFAULT); | |
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | STATIC int | |
1327 | xfs_ioc_getbmapx( | |
1328 | bhv_desc_t *bdp, | |
1329 | void __user *arg) | |
1330 | { | |
1331 | struct getbmapx bmx; | |
1332 | struct getbmap bm; | |
1333 | int iflags; | |
1334 | int error; | |
1335 | ||
1336 | if (copy_from_user(&bmx, arg, sizeof(bmx))) | |
1337 | return -XFS_ERROR(EFAULT); | |
1338 | ||
1339 | if (bmx.bmv_count < 2) | |
1340 | return -XFS_ERROR(EINVAL); | |
1341 | ||
1342 | /* | |
1343 | * Map input getbmapx structure to a getbmap | |
1344 | * structure for xfs_getbmap. | |
1345 | */ | |
1346 | GETBMAP_CONVERT(bmx, bm); | |
1347 | ||
1348 | iflags = bmx.bmv_iflags; | |
1349 | ||
1350 | if (iflags & (~BMV_IF_VALID)) | |
1351 | return -XFS_ERROR(EINVAL); | |
1352 | ||
1353 | iflags |= BMV_IF_EXTENDED; | |
1354 | ||
1355 | error = xfs_getbmap(bdp, &bm, (struct getbmapx __user *)arg+1, iflags); | |
1356 | if (error) | |
1357 | return -error; | |
1358 | ||
1359 | GETBMAP_CONVERT(bm, bmx); | |
1360 | ||
1361 | if (copy_to_user(arg, &bmx, sizeof(bmx))) | |
1362 | return -XFS_ERROR(EFAULT); | |
1363 | ||
1364 | return 0; | |
1365 | } |