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Commit | Line | Data |
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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" | |
993386c1 | 50 | #include "xfs_vnodeops.h" |
1da177e4 | 51 | |
16f7e0fe | 52 | #include <linux/capability.h> |
1da177e4 LT |
53 | #include <linux/dcache.h> |
54 | #include <linux/mount.h> | |
55 | #include <linux/namei.h> | |
56 | #include <linux/pagemap.h> | |
57 | ||
58 | /* | |
59 | * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to | |
60 | * a file or fs handle. | |
61 | * | |
62 | * XFS_IOC_PATH_TO_FSHANDLE | |
63 | * returns fs handle for a mount point or path within that mount point | |
64 | * XFS_IOC_FD_TO_HANDLE | |
65 | * returns full handle for a FD opened in user space | |
66 | * XFS_IOC_PATH_TO_HANDLE | |
67 | * returns full handle for a path | |
68 | */ | |
69 | STATIC int | |
70 | xfs_find_handle( | |
71 | unsigned int cmd, | |
72 | void __user *arg) | |
73 | { | |
74 | int hsize; | |
75 | xfs_handle_t handle; | |
76 | xfs_fsop_handlereq_t hreq; | |
77 | struct inode *inode; | |
67fcaa73 | 78 | bhv_vnode_t *vp; |
1da177e4 LT |
79 | |
80 | if (copy_from_user(&hreq, arg, sizeof(hreq))) | |
81 | return -XFS_ERROR(EFAULT); | |
82 | ||
83 | memset((char *)&handle, 0, sizeof(handle)); | |
84 | ||
85 | switch (cmd) { | |
86 | case XFS_IOC_PATH_TO_FSHANDLE: | |
87 | case XFS_IOC_PATH_TO_HANDLE: { | |
88 | struct nameidata nd; | |
89 | int error; | |
90 | ||
91 | error = user_path_walk_link((const char __user *)hreq.path, &nd); | |
92 | if (error) | |
93 | return error; | |
94 | ||
95 | ASSERT(nd.dentry); | |
96 | ASSERT(nd.dentry->d_inode); | |
97 | inode = igrab(nd.dentry->d_inode); | |
98 | path_release(&nd); | |
99 | break; | |
100 | } | |
101 | ||
102 | case XFS_IOC_FD_TO_HANDLE: { | |
103 | struct file *file; | |
104 | ||
105 | file = fget(hreq.fd); | |
106 | if (!file) | |
107 | return -EBADF; | |
108 | ||
e678fb0d JJS |
109 | ASSERT(file->f_path.dentry); |
110 | ASSERT(file->f_path.dentry->d_inode); | |
111 | inode = igrab(file->f_path.dentry->d_inode); | |
1da177e4 LT |
112 | fput(file); |
113 | break; | |
114 | } | |
115 | ||
116 | default: | |
117 | ASSERT(0); | |
118 | return -XFS_ERROR(EINVAL); | |
119 | } | |
120 | ||
121 | if (inode->i_sb->s_magic != XFS_SB_MAGIC) { | |
122 | /* we're not in XFS anymore, Toto */ | |
123 | iput(inode); | |
124 | return -XFS_ERROR(EINVAL); | |
125 | } | |
126 | ||
0432dab2 CH |
127 | switch (inode->i_mode & S_IFMT) { |
128 | case S_IFREG: | |
129 | case S_IFDIR: | |
130 | case S_IFLNK: | |
131 | break; | |
132 | default: | |
1da177e4 LT |
133 | iput(inode); |
134 | return -XFS_ERROR(EBADF); | |
135 | } | |
136 | ||
0432dab2 | 137 | /* we need the vnode */ |
ec86dc02 | 138 | vp = vn_from_inode(inode); |
0432dab2 | 139 | |
1da177e4 | 140 | /* now we can grab the fsid */ |
2f6f7b3d CH |
141 | memcpy(&handle.ha_fsid, XFS_MTOVFS(XFS_I(inode)->i_mount)->vfs_altfsid, |
142 | sizeof(xfs_fsid_t)); | |
1da177e4 LT |
143 | hsize = sizeof(xfs_fsid_t); |
144 | ||
145 | if (cmd != XFS_IOC_PATH_TO_FSHANDLE) { | |
146 | xfs_inode_t *ip; | |
1da177e4 LT |
147 | int lock_mode; |
148 | ||
149 | /* need to get access to the xfs_inode to read the generation */ | |
75e17b3c | 150 | ip = xfs_vtoi(vp); |
1da177e4 LT |
151 | ASSERT(ip); |
152 | lock_mode = xfs_ilock_map_shared(ip); | |
153 | ||
154 | /* fill in fid section of handle from inode */ | |
155 | handle.ha_fid.xfs_fid_len = sizeof(xfs_fid_t) - | |
156 | sizeof(handle.ha_fid.xfs_fid_len); | |
157 | handle.ha_fid.xfs_fid_pad = 0; | |
158 | handle.ha_fid.xfs_fid_gen = ip->i_d.di_gen; | |
159 | handle.ha_fid.xfs_fid_ino = ip->i_ino; | |
160 | ||
161 | xfs_iunlock_map_shared(ip, lock_mode); | |
162 | ||
163 | hsize = XFS_HSIZE(handle); | |
164 | } | |
165 | ||
166 | /* now copy our handle into the user buffer & write out the size */ | |
167 | if (copy_to_user(hreq.ohandle, &handle, hsize) || | |
168 | copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) { | |
169 | iput(inode); | |
170 | return -XFS_ERROR(EFAULT); | |
171 | } | |
172 | ||
173 | iput(inode); | |
174 | return 0; | |
175 | } | |
176 | ||
177 | ||
178 | /* | |
179 | * Convert userspace handle data into vnode (and inode). | |
180 | * We [ab]use the fact that all the fsop_handlereq ioctl calls | |
181 | * have a data structure argument whose first component is always | |
182 | * a xfs_fsop_handlereq_t, so we can cast to and from this type. | |
183 | * This allows us to optimise the copy_from_user calls and gives | |
184 | * a handy, shared routine. | |
185 | * | |
186 | * If no error, caller must always VN_RELE the returned vp. | |
187 | */ | |
188 | STATIC int | |
189 | xfs_vget_fsop_handlereq( | |
190 | xfs_mount_t *mp, | |
191 | struct inode *parinode, /* parent inode pointer */ | |
192 | xfs_fsop_handlereq_t *hreq, | |
67fcaa73 | 193 | bhv_vnode_t **vp, |
1da177e4 LT |
194 | struct inode **inode) |
195 | { | |
196 | void __user *hanp; | |
197 | size_t hlen; | |
198 | xfs_fid_t *xfid; | |
199 | xfs_handle_t *handlep; | |
200 | xfs_handle_t handle; | |
201 | xfs_inode_t *ip; | |
202 | struct inode *inodep; | |
67fcaa73 | 203 | bhv_vnode_t *vpp; |
1da177e4 LT |
204 | xfs_ino_t ino; |
205 | __u32 igen; | |
206 | int error; | |
207 | ||
208 | /* | |
209 | * Only allow handle opens under a directory. | |
210 | */ | |
211 | if (!S_ISDIR(parinode->i_mode)) | |
212 | return XFS_ERROR(ENOTDIR); | |
213 | ||
214 | hanp = hreq->ihandle; | |
215 | hlen = hreq->ihandlen; | |
216 | handlep = &handle; | |
217 | ||
218 | if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep)) | |
219 | return XFS_ERROR(EINVAL); | |
220 | if (copy_from_user(handlep, hanp, hlen)) | |
221 | return XFS_ERROR(EFAULT); | |
222 | if (hlen < sizeof(*handlep)) | |
223 | memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen); | |
224 | if (hlen > sizeof(handlep->ha_fsid)) { | |
225 | if (handlep->ha_fid.xfs_fid_len != | |
226 | (hlen - sizeof(handlep->ha_fsid) | |
227 | - sizeof(handlep->ha_fid.xfs_fid_len)) | |
228 | || handlep->ha_fid.xfs_fid_pad) | |
229 | return XFS_ERROR(EINVAL); | |
230 | } | |
231 | ||
232 | /* | |
233 | * Crack the handle, obtain the inode # & generation # | |
234 | */ | |
235 | xfid = (struct xfs_fid *)&handlep->ha_fid; | |
236 | if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) { | |
237 | ino = xfid->xfs_fid_ino; | |
238 | igen = xfid->xfs_fid_gen; | |
239 | } else { | |
240 | return XFS_ERROR(EINVAL); | |
241 | } | |
242 | ||
243 | /* | |
244 | * Get the XFS inode, building a vnode to go with it. | |
245 | */ | |
246 | error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0); | |
247 | if (error) | |
248 | return error; | |
249 | if (ip == NULL) | |
250 | return XFS_ERROR(EIO); | |
251 | if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) { | |
252 | xfs_iput_new(ip, XFS_ILOCK_SHARED); | |
253 | return XFS_ERROR(ENOENT); | |
254 | } | |
255 | ||
256 | vpp = XFS_ITOV(ip); | |
ec86dc02 | 257 | inodep = vn_to_inode(vpp); |
1da177e4 LT |
258 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
259 | ||
260 | *vp = vpp; | |
261 | *inode = inodep; | |
262 | return 0; | |
263 | } | |
264 | ||
265 | STATIC int | |
266 | xfs_open_by_handle( | |
267 | xfs_mount_t *mp, | |
268 | void __user *arg, | |
269 | struct file *parfilp, | |
270 | struct inode *parinode) | |
271 | { | |
272 | int error; | |
273 | int new_fd; | |
274 | int permflag; | |
275 | struct file *filp; | |
276 | struct inode *inode; | |
277 | struct dentry *dentry; | |
67fcaa73 | 278 | bhv_vnode_t *vp; |
1da177e4 LT |
279 | xfs_fsop_handlereq_t hreq; |
280 | ||
281 | if (!capable(CAP_SYS_ADMIN)) | |
282 | return -XFS_ERROR(EPERM); | |
283 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) | |
284 | return -XFS_ERROR(EFAULT); | |
285 | ||
286 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode); | |
287 | if (error) | |
288 | return -error; | |
289 | ||
290 | /* Restrict xfs_open_by_handle to directories & regular files. */ | |
291 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { | |
292 | iput(inode); | |
293 | return -XFS_ERROR(EINVAL); | |
294 | } | |
295 | ||
296 | #if BITS_PER_LONG != 32 | |
297 | hreq.oflags |= O_LARGEFILE; | |
298 | #endif | |
299 | /* Put open permission in namei format. */ | |
300 | permflag = hreq.oflags; | |
301 | if ((permflag+1) & O_ACCMODE) | |
302 | permflag++; | |
303 | if (permflag & O_TRUNC) | |
304 | permflag |= 2; | |
305 | ||
306 | if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && | |
307 | (permflag & FMODE_WRITE) && IS_APPEND(inode)) { | |
308 | iput(inode); | |
309 | return -XFS_ERROR(EPERM); | |
310 | } | |
311 | ||
312 | if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) { | |
313 | iput(inode); | |
314 | return -XFS_ERROR(EACCES); | |
315 | } | |
316 | ||
317 | /* Can't write directories. */ | |
318 | if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) { | |
319 | iput(inode); | |
320 | return -XFS_ERROR(EISDIR); | |
321 | } | |
322 | ||
323 | if ((new_fd = get_unused_fd()) < 0) { | |
324 | iput(inode); | |
325 | return new_fd; | |
326 | } | |
327 | ||
328 | dentry = d_alloc_anon(inode); | |
329 | if (dentry == NULL) { | |
330 | iput(inode); | |
331 | put_unused_fd(new_fd); | |
332 | return -XFS_ERROR(ENOMEM); | |
333 | } | |
334 | ||
335 | /* Ensure umount returns EBUSY on umounts while this file is open. */ | |
e678fb0d | 336 | mntget(parfilp->f_path.mnt); |
1da177e4 LT |
337 | |
338 | /* Create file pointer. */ | |
e678fb0d | 339 | filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags); |
1da177e4 LT |
340 | if (IS_ERR(filp)) { |
341 | put_unused_fd(new_fd); | |
342 | return -XFS_ERROR(-PTR_ERR(filp)); | |
343 | } | |
2e2e7bb1 VA |
344 | if (inode->i_mode & S_IFREG) { |
345 | /* invisible operation should not change atime */ | |
346 | filp->f_flags |= O_NOATIME; | |
3562fd45 | 347 | filp->f_op = &xfs_invis_file_operations; |
2e2e7bb1 | 348 | } |
1da177e4 LT |
349 | |
350 | fd_install(new_fd, filp); | |
351 | return new_fd; | |
352 | } | |
353 | ||
804c83c3 CH |
354 | /* |
355 | * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's | |
356 | * unused first argument. | |
357 | */ | |
358 | STATIC int | |
359 | do_readlink( | |
360 | char __user *buffer, | |
361 | int buflen, | |
362 | const char *link) | |
363 | { | |
364 | int len; | |
365 | ||
366 | len = PTR_ERR(link); | |
367 | if (IS_ERR(link)) | |
368 | goto out; | |
369 | ||
370 | len = strlen(link); | |
371 | if (len > (unsigned) buflen) | |
372 | len = buflen; | |
373 | if (copy_to_user(buffer, link, len)) | |
374 | len = -EFAULT; | |
375 | out: | |
376 | return len; | |
377 | } | |
378 | ||
379 | ||
1da177e4 LT |
380 | STATIC int |
381 | xfs_readlink_by_handle( | |
382 | xfs_mount_t *mp, | |
383 | void __user *arg, | |
1da177e4 LT |
384 | struct inode *parinode) |
385 | { | |
1da177e4 LT |
386 | struct inode *inode; |
387 | xfs_fsop_handlereq_t hreq; | |
67fcaa73 | 388 | bhv_vnode_t *vp; |
1da177e4 | 389 | __u32 olen; |
804c83c3 CH |
390 | void *link; |
391 | int error; | |
1da177e4 LT |
392 | |
393 | if (!capable(CAP_SYS_ADMIN)) | |
394 | return -XFS_ERROR(EPERM); | |
395 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) | |
396 | return -XFS_ERROR(EFAULT); | |
397 | ||
398 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &vp, &inode); | |
399 | if (error) | |
400 | return -error; | |
401 | ||
402 | /* Restrict this handle operation to symlinks only. */ | |
0432dab2 | 403 | if (!S_ISLNK(inode->i_mode)) { |
804c83c3 CH |
404 | error = -XFS_ERROR(EINVAL); |
405 | goto out_iput; | |
1da177e4 LT |
406 | } |
407 | ||
408 | if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) { | |
804c83c3 CH |
409 | error = -XFS_ERROR(EFAULT); |
410 | goto out_iput; | |
1da177e4 | 411 | } |
1da177e4 | 412 | |
804c83c3 CH |
413 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
414 | if (!link) | |
415 | goto out_iput; | |
1da177e4 | 416 | |
739bfb2a | 417 | error = -xfs_readlink(XFS_I(inode), link); |
67fcaa73 | 418 | if (error) |
804c83c3 CH |
419 | goto out_kfree; |
420 | error = do_readlink(hreq.ohandle, olen, link); | |
421 | if (error) | |
422 | goto out_kfree; | |
67fcaa73 | 423 | |
804c83c3 CH |
424 | out_kfree: |
425 | kfree(link); | |
426 | out_iput: | |
427 | iput(inode); | |
428 | return error; | |
1da177e4 LT |
429 | } |
430 | ||
431 | STATIC int | |
432 | xfs_fssetdm_by_handle( | |
433 | xfs_mount_t *mp, | |
434 | void __user *arg, | |
1da177e4 LT |
435 | struct inode *parinode) |
436 | { | |
437 | int error; | |
438 | struct fsdmidata fsd; | |
439 | xfs_fsop_setdm_handlereq_t dmhreq; | |
440 | struct inode *inode; | |
67fcaa73 | 441 | bhv_vnode_t *vp; |
1da177e4 LT |
442 | |
443 | if (!capable(CAP_MKNOD)) | |
444 | return -XFS_ERROR(EPERM); | |
445 | if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) | |
446 | return -XFS_ERROR(EFAULT); | |
447 | ||
448 | error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &vp, &inode); | |
449 | if (error) | |
450 | return -error; | |
451 | ||
452 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) { | |
453 | VN_RELE(vp); | |
454 | return -XFS_ERROR(EPERM); | |
455 | } | |
456 | ||
457 | if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { | |
458 | VN_RELE(vp); | |
459 | return -XFS_ERROR(EFAULT); | |
460 | } | |
461 | ||
993386c1 CH |
462 | error = xfs_set_dmattrs(xfs_vtoi(vp), |
463 | fsd.fsd_dmevmask, fsd.fsd_dmstate); | |
1da177e4 LT |
464 | |
465 | VN_RELE(vp); | |
466 | if (error) | |
467 | return -error; | |
468 | return 0; | |
469 | } | |
470 | ||
471 | STATIC int | |
472 | xfs_attrlist_by_handle( | |
473 | xfs_mount_t *mp, | |
474 | void __user *arg, | |
1da177e4 LT |
475 | struct inode *parinode) |
476 | { | |
477 | int error; | |
478 | attrlist_cursor_kern_t *cursor; | |
479 | xfs_fsop_attrlist_handlereq_t al_hreq; | |
480 | struct inode *inode; | |
67fcaa73 | 481 | bhv_vnode_t *vp; |
1da177e4 LT |
482 | char *kbuf; |
483 | ||
484 | if (!capable(CAP_SYS_ADMIN)) | |
485 | return -XFS_ERROR(EPERM); | |
486 | if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) | |
487 | return -XFS_ERROR(EFAULT); | |
488 | if (al_hreq.buflen > XATTR_LIST_MAX) | |
489 | return -XFS_ERROR(EINVAL); | |
490 | ||
491 | error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq, | |
492 | &vp, &inode); | |
493 | if (error) | |
494 | goto out; | |
495 | ||
496 | kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); | |
497 | if (!kbuf) | |
498 | goto out_vn_rele; | |
499 | ||
500 | cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; | |
739bfb2a CH |
501 | error = xfs_attr_list(XFS_I(inode), kbuf, al_hreq.buflen, |
502 | al_hreq.flags, cursor); | |
1da177e4 LT |
503 | if (error) |
504 | goto out_kfree; | |
505 | ||
506 | if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) | |
507 | error = -EFAULT; | |
508 | ||
509 | out_kfree: | |
510 | kfree(kbuf); | |
511 | out_vn_rele: | |
512 | VN_RELE(vp); | |
513 | out: | |
514 | return -error; | |
515 | } | |
516 | ||
517 | STATIC int | |
518 | xfs_attrmulti_attr_get( | |
739bfb2a | 519 | struct inode *inode, |
1da177e4 LT |
520 | char *name, |
521 | char __user *ubuf, | |
522 | __uint32_t *len, | |
523 | __uint32_t flags) | |
524 | { | |
525 | char *kbuf; | |
526 | int error = EFAULT; | |
527 | ||
528 | if (*len > XATTR_SIZE_MAX) | |
529 | return EINVAL; | |
530 | kbuf = kmalloc(*len, GFP_KERNEL); | |
531 | if (!kbuf) | |
532 | return ENOMEM; | |
533 | ||
739bfb2a | 534 | error = xfs_attr_get(XFS_I(inode), name, kbuf, len, flags, NULL); |
1da177e4 LT |
535 | if (error) |
536 | goto out_kfree; | |
537 | ||
538 | if (copy_to_user(ubuf, kbuf, *len)) | |
539 | error = EFAULT; | |
540 | ||
541 | out_kfree: | |
542 | kfree(kbuf); | |
543 | return error; | |
544 | } | |
545 | ||
546 | STATIC int | |
547 | xfs_attrmulti_attr_set( | |
739bfb2a | 548 | struct inode *inode, |
1da177e4 LT |
549 | char *name, |
550 | const char __user *ubuf, | |
551 | __uint32_t len, | |
552 | __uint32_t flags) | |
553 | { | |
554 | char *kbuf; | |
555 | int error = EFAULT; | |
556 | ||
739bfb2a | 557 | if (IS_RDONLY(inode)) |
3542c6e1 | 558 | return -EROFS; |
739bfb2a | 559 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
1da177e4 LT |
560 | return EPERM; |
561 | if (len > XATTR_SIZE_MAX) | |
562 | return EINVAL; | |
563 | ||
564 | kbuf = kmalloc(len, GFP_KERNEL); | |
565 | if (!kbuf) | |
566 | return ENOMEM; | |
567 | ||
568 | if (copy_from_user(kbuf, ubuf, len)) | |
569 | goto out_kfree; | |
570 | ||
739bfb2a | 571 | error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); |
1da177e4 LT |
572 | |
573 | out_kfree: | |
574 | kfree(kbuf); | |
575 | return error; | |
576 | } | |
577 | ||
578 | STATIC int | |
579 | xfs_attrmulti_attr_remove( | |
739bfb2a | 580 | struct inode *inode, |
1da177e4 LT |
581 | char *name, |
582 | __uint32_t flags) | |
583 | { | |
739bfb2a | 584 | if (IS_RDONLY(inode)) |
3542c6e1 | 585 | return -EROFS; |
739bfb2a | 586 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
1da177e4 | 587 | return EPERM; |
739bfb2a | 588 | return xfs_attr_remove(XFS_I(inode), name, flags); |
1da177e4 LT |
589 | } |
590 | ||
591 | STATIC int | |
592 | xfs_attrmulti_by_handle( | |
593 | xfs_mount_t *mp, | |
594 | void __user *arg, | |
1da177e4 LT |
595 | struct inode *parinode) |
596 | { | |
597 | int error; | |
598 | xfs_attr_multiop_t *ops; | |
599 | xfs_fsop_attrmulti_handlereq_t am_hreq; | |
600 | struct inode *inode; | |
67fcaa73 | 601 | bhv_vnode_t *vp; |
1da177e4 LT |
602 | unsigned int i, size; |
603 | char *attr_name; | |
604 | ||
605 | if (!capable(CAP_SYS_ADMIN)) | |
606 | return -XFS_ERROR(EPERM); | |
607 | if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) | |
608 | return -XFS_ERROR(EFAULT); | |
609 | ||
610 | error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &vp, &inode); | |
611 | if (error) | |
612 | goto out; | |
613 | ||
614 | error = E2BIG; | |
615 | size = am_hreq.opcount * sizeof(attr_multiop_t); | |
616 | if (!size || size > 16 * PAGE_SIZE) | |
617 | goto out_vn_rele; | |
618 | ||
619 | error = ENOMEM; | |
620 | ops = kmalloc(size, GFP_KERNEL); | |
621 | if (!ops) | |
622 | goto out_vn_rele; | |
623 | ||
624 | error = EFAULT; | |
625 | if (copy_from_user(ops, am_hreq.ops, size)) | |
626 | goto out_kfree_ops; | |
627 | ||
628 | attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); | |
629 | if (!attr_name) | |
630 | goto out_kfree_ops; | |
631 | ||
632 | ||
633 | error = 0; | |
634 | for (i = 0; i < am_hreq.opcount; i++) { | |
635 | ops[i].am_error = strncpy_from_user(attr_name, | |
636 | ops[i].am_attrname, MAXNAMELEN); | |
637 | if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) | |
638 | error = -ERANGE; | |
639 | if (ops[i].am_error < 0) | |
640 | break; | |
641 | ||
642 | switch (ops[i].am_opcode) { | |
643 | case ATTR_OP_GET: | |
739bfb2a | 644 | ops[i].am_error = xfs_attrmulti_attr_get(inode, |
1da177e4 LT |
645 | attr_name, ops[i].am_attrvalue, |
646 | &ops[i].am_length, ops[i].am_flags); | |
647 | break; | |
648 | case ATTR_OP_SET: | |
739bfb2a | 649 | ops[i].am_error = xfs_attrmulti_attr_set(inode, |
1da177e4 LT |
650 | attr_name, ops[i].am_attrvalue, |
651 | ops[i].am_length, ops[i].am_flags); | |
652 | break; | |
653 | case ATTR_OP_REMOVE: | |
739bfb2a | 654 | ops[i].am_error = xfs_attrmulti_attr_remove(inode, |
1da177e4 LT |
655 | attr_name, ops[i].am_flags); |
656 | break; | |
657 | default: | |
658 | ops[i].am_error = EINVAL; | |
659 | } | |
660 | } | |
661 | ||
662 | if (copy_to_user(am_hreq.ops, ops, size)) | |
663 | error = XFS_ERROR(EFAULT); | |
664 | ||
665 | kfree(attr_name); | |
666 | out_kfree_ops: | |
667 | kfree(ops); | |
668 | out_vn_rele: | |
669 | VN_RELE(vp); | |
670 | out: | |
671 | return -error; | |
672 | } | |
673 | ||
674 | /* prototypes for a few of the stack-hungry cases that have | |
675 | * their own functions. Functions are defined after their use | |
676 | * so gcc doesn't get fancy and inline them with -03 */ | |
677 | ||
678 | STATIC int | |
679 | xfs_ioc_space( | |
993386c1 | 680 | struct xfs_inode *ip, |
f37ea149 | 681 | struct inode *inode, |
1da177e4 LT |
682 | struct file *filp, |
683 | int flags, | |
684 | unsigned int cmd, | |
685 | void __user *arg); | |
686 | ||
687 | STATIC int | |
688 | xfs_ioc_bulkstat( | |
689 | xfs_mount_t *mp, | |
690 | unsigned int cmd, | |
691 | void __user *arg); | |
692 | ||
693 | STATIC int | |
694 | xfs_ioc_fsgeometry_v1( | |
695 | xfs_mount_t *mp, | |
696 | void __user *arg); | |
697 | ||
698 | STATIC int | |
699 | xfs_ioc_fsgeometry( | |
700 | xfs_mount_t *mp, | |
701 | void __user *arg); | |
702 | ||
703 | STATIC int | |
704 | xfs_ioc_xattr( | |
67fcaa73 | 705 | bhv_vnode_t *vp, |
1da177e4 LT |
706 | xfs_inode_t *ip, |
707 | struct file *filp, | |
708 | unsigned int cmd, | |
709 | void __user *arg); | |
710 | ||
711 | STATIC int | |
712 | xfs_ioc_getbmap( | |
993386c1 | 713 | struct xfs_inode *ip, |
1da177e4 LT |
714 | int flags, |
715 | unsigned int cmd, | |
716 | void __user *arg); | |
717 | ||
718 | STATIC int | |
719 | xfs_ioc_getbmapx( | |
993386c1 | 720 | struct xfs_inode *ip, |
1da177e4 LT |
721 | void __user *arg); |
722 | ||
723 | int | |
724 | xfs_ioctl( | |
993386c1 | 725 | xfs_inode_t *ip, |
1da177e4 LT |
726 | struct file *filp, |
727 | int ioflags, | |
728 | unsigned int cmd, | |
729 | void __user *arg) | |
730 | { | |
993386c1 CH |
731 | struct inode *inode = filp->f_path.dentry->d_inode; |
732 | bhv_vnode_t *vp = vn_from_inode(inode); | |
733 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 | 734 | int error; |
1da177e4 | 735 | |
1543d79c | 736 | vn_trace_entry(XFS_I(inode), "xfs_ioctl", (inst_t *)__return_address); |
1da177e4 | 737 | |
1da177e4 LT |
738 | switch (cmd) { |
739 | ||
740 | case XFS_IOC_ALLOCSP: | |
741 | case XFS_IOC_FREESP: | |
742 | case XFS_IOC_RESVSP: | |
743 | case XFS_IOC_UNRESVSP: | |
744 | case XFS_IOC_ALLOCSP64: | |
745 | case XFS_IOC_FREESP64: | |
746 | case XFS_IOC_RESVSP64: | |
747 | case XFS_IOC_UNRESVSP64: | |
748 | /* | |
749 | * Only allow the sys admin to reserve space unless | |
750 | * unwritten extents are enabled. | |
751 | */ | |
752 | if (!XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) && | |
753 | !capable(CAP_SYS_ADMIN)) | |
754 | return -EPERM; | |
755 | ||
993386c1 | 756 | return xfs_ioc_space(ip, inode, filp, ioflags, cmd, arg); |
1da177e4 LT |
757 | |
758 | case XFS_IOC_DIOINFO: { | |
759 | struct dioattr da; | |
760 | xfs_buftarg_t *target = | |
761 | (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ? | |
762 | mp->m_rtdev_targp : mp->m_ddev_targp; | |
763 | ||
ce8e922c | 764 | da.d_mem = da.d_miniosz = 1 << target->bt_sshift; |
0d14824c | 765 | da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); |
1da177e4 LT |
766 | |
767 | if (copy_to_user(arg, &da, sizeof(da))) | |
768 | return -XFS_ERROR(EFAULT); | |
769 | return 0; | |
770 | } | |
771 | ||
772 | case XFS_IOC_FSBULKSTAT_SINGLE: | |
773 | case XFS_IOC_FSBULKSTAT: | |
774 | case XFS_IOC_FSINUMBERS: | |
775 | return xfs_ioc_bulkstat(mp, cmd, arg); | |
776 | ||
777 | case XFS_IOC_FSGEOMETRY_V1: | |
778 | return xfs_ioc_fsgeometry_v1(mp, arg); | |
779 | ||
780 | case XFS_IOC_FSGEOMETRY: | |
781 | return xfs_ioc_fsgeometry(mp, arg); | |
782 | ||
783 | case XFS_IOC_GETVERSION: | |
87395deb AD |
784 | return put_user(inode->i_generation, (int __user *)arg); |
785 | ||
1da177e4 LT |
786 | case XFS_IOC_GETXFLAGS: |
787 | case XFS_IOC_SETXFLAGS: | |
788 | case XFS_IOC_FSGETXATTR: | |
789 | case XFS_IOC_FSSETXATTR: | |
790 | case XFS_IOC_FSGETXATTRA: | |
791 | return xfs_ioc_xattr(vp, ip, filp, cmd, arg); | |
792 | ||
793 | case XFS_IOC_FSSETDM: { | |
794 | struct fsdmidata dmi; | |
795 | ||
796 | if (copy_from_user(&dmi, arg, sizeof(dmi))) | |
797 | return -XFS_ERROR(EFAULT); | |
798 | ||
993386c1 CH |
799 | error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, |
800 | dmi.fsd_dmstate); | |
1da177e4 LT |
801 | return -error; |
802 | } | |
803 | ||
804 | case XFS_IOC_GETBMAP: | |
805 | case XFS_IOC_GETBMAPA: | |
993386c1 | 806 | return xfs_ioc_getbmap(ip, ioflags, cmd, arg); |
1da177e4 LT |
807 | |
808 | case XFS_IOC_GETBMAPX: | |
993386c1 | 809 | return xfs_ioc_getbmapx(ip, arg); |
1da177e4 LT |
810 | |
811 | case XFS_IOC_FD_TO_HANDLE: | |
812 | case XFS_IOC_PATH_TO_HANDLE: | |
813 | case XFS_IOC_PATH_TO_FSHANDLE: | |
814 | return xfs_find_handle(cmd, arg); | |
815 | ||
816 | case XFS_IOC_OPEN_BY_HANDLE: | |
817 | return xfs_open_by_handle(mp, arg, filp, inode); | |
818 | ||
819 | case XFS_IOC_FSSETDM_BY_HANDLE: | |
5180602e | 820 | return xfs_fssetdm_by_handle(mp, arg, inode); |
1da177e4 LT |
821 | |
822 | case XFS_IOC_READLINK_BY_HANDLE: | |
5180602e | 823 | return xfs_readlink_by_handle(mp, arg, inode); |
1da177e4 LT |
824 | |
825 | case XFS_IOC_ATTRLIST_BY_HANDLE: | |
5180602e | 826 | return xfs_attrlist_by_handle(mp, arg, inode); |
1da177e4 LT |
827 | |
828 | case XFS_IOC_ATTRMULTI_BY_HANDLE: | |
5180602e | 829 | return xfs_attrmulti_by_handle(mp, arg, inode); |
1da177e4 LT |
830 | |
831 | case XFS_IOC_SWAPEXT: { | |
832 | error = xfs_swapext((struct xfs_swapext __user *)arg); | |
833 | return -error; | |
834 | } | |
835 | ||
836 | case XFS_IOC_FSCOUNTS: { | |
837 | xfs_fsop_counts_t out; | |
838 | ||
839 | error = xfs_fs_counts(mp, &out); | |
840 | if (error) | |
841 | return -error; | |
842 | ||
843 | if (copy_to_user(arg, &out, sizeof(out))) | |
844 | return -XFS_ERROR(EFAULT); | |
845 | return 0; | |
846 | } | |
847 | ||
848 | case XFS_IOC_SET_RESBLKS: { | |
849 | xfs_fsop_resblks_t inout; | |
850 | __uint64_t in; | |
851 | ||
852 | if (!capable(CAP_SYS_ADMIN)) | |
853 | return -EPERM; | |
854 | ||
855 | if (copy_from_user(&inout, arg, sizeof(inout))) | |
856 | return -XFS_ERROR(EFAULT); | |
857 | ||
858 | /* input parameter is passed in resblks field of structure */ | |
859 | in = inout.resblks; | |
860 | error = xfs_reserve_blocks(mp, &in, &inout); | |
861 | if (error) | |
862 | return -error; | |
863 | ||
864 | if (copy_to_user(arg, &inout, sizeof(inout))) | |
865 | return -XFS_ERROR(EFAULT); | |
866 | return 0; | |
867 | } | |
868 | ||
869 | case XFS_IOC_GET_RESBLKS: { | |
870 | xfs_fsop_resblks_t out; | |
871 | ||
872 | if (!capable(CAP_SYS_ADMIN)) | |
873 | return -EPERM; | |
874 | ||
875 | error = xfs_reserve_blocks(mp, NULL, &out); | |
876 | if (error) | |
877 | return -error; | |
878 | ||
879 | if (copy_to_user(arg, &out, sizeof(out))) | |
880 | return -XFS_ERROR(EFAULT); | |
881 | ||
882 | return 0; | |
883 | } | |
884 | ||
885 | case XFS_IOC_FSGROWFSDATA: { | |
886 | xfs_growfs_data_t in; | |
887 | ||
888 | if (!capable(CAP_SYS_ADMIN)) | |
889 | return -EPERM; | |
890 | ||
891 | if (copy_from_user(&in, arg, sizeof(in))) | |
892 | return -XFS_ERROR(EFAULT); | |
893 | ||
894 | error = xfs_growfs_data(mp, &in); | |
895 | return -error; | |
896 | } | |
897 | ||
898 | case XFS_IOC_FSGROWFSLOG: { | |
899 | xfs_growfs_log_t in; | |
900 | ||
901 | if (!capable(CAP_SYS_ADMIN)) | |
902 | return -EPERM; | |
903 | ||
904 | if (copy_from_user(&in, arg, sizeof(in))) | |
905 | return -XFS_ERROR(EFAULT); | |
906 | ||
907 | error = xfs_growfs_log(mp, &in); | |
908 | return -error; | |
909 | } | |
910 | ||
911 | case XFS_IOC_FSGROWFSRT: { | |
912 | xfs_growfs_rt_t in; | |
913 | ||
914 | if (!capable(CAP_SYS_ADMIN)) | |
915 | return -EPERM; | |
916 | ||
917 | if (copy_from_user(&in, arg, sizeof(in))) | |
918 | return -XFS_ERROR(EFAULT); | |
919 | ||
920 | error = xfs_growfs_rt(mp, &in); | |
921 | return -error; | |
922 | } | |
923 | ||
924 | case XFS_IOC_FREEZE: | |
925 | if (!capable(CAP_SYS_ADMIN)) | |
926 | return -EPERM; | |
927 | ||
928 | if (inode->i_sb->s_frozen == SB_UNFROZEN) | |
929 | freeze_bdev(inode->i_sb->s_bdev); | |
930 | return 0; | |
931 | ||
932 | case XFS_IOC_THAW: | |
933 | if (!capable(CAP_SYS_ADMIN)) | |
934 | return -EPERM; | |
935 | if (inode->i_sb->s_frozen != SB_UNFROZEN) | |
936 | thaw_bdev(inode->i_sb->s_bdev, inode->i_sb); | |
937 | return 0; | |
938 | ||
939 | case XFS_IOC_GOINGDOWN: { | |
940 | __uint32_t in; | |
941 | ||
942 | if (!capable(CAP_SYS_ADMIN)) | |
943 | return -EPERM; | |
944 | ||
945 | if (get_user(in, (__uint32_t __user *)arg)) | |
946 | return -XFS_ERROR(EFAULT); | |
947 | ||
948 | error = xfs_fs_goingdown(mp, in); | |
949 | return -error; | |
950 | } | |
951 | ||
952 | case XFS_IOC_ERROR_INJECTION: { | |
953 | xfs_error_injection_t in; | |
954 | ||
955 | if (!capable(CAP_SYS_ADMIN)) | |
956 | return -EPERM; | |
957 | ||
958 | if (copy_from_user(&in, arg, sizeof(in))) | |
959 | return -XFS_ERROR(EFAULT); | |
960 | ||
961 | error = xfs_errortag_add(in.errtag, mp); | |
962 | return -error; | |
963 | } | |
964 | ||
965 | case XFS_IOC_ERROR_CLEARALL: | |
966 | if (!capable(CAP_SYS_ADMIN)) | |
967 | return -EPERM; | |
968 | ||
969 | error = xfs_errortag_clearall(mp); | |
970 | return -error; | |
971 | ||
972 | default: | |
973 | return -ENOTTY; | |
974 | } | |
975 | } | |
976 | ||
977 | STATIC int | |
978 | xfs_ioc_space( | |
993386c1 | 979 | struct xfs_inode *ip, |
f37ea149 | 980 | struct inode *inode, |
1da177e4 LT |
981 | struct file *filp, |
982 | int ioflags, | |
983 | unsigned int cmd, | |
984 | void __user *arg) | |
985 | { | |
986 | xfs_flock64_t bf; | |
987 | int attr_flags = 0; | |
988 | int error; | |
989 | ||
f37ea149 | 990 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) |
1da177e4 LT |
991 | return -XFS_ERROR(EPERM); |
992 | ||
ad4a8ac4 | 993 | if (!(filp->f_mode & FMODE_WRITE)) |
1da177e4 LT |
994 | return -XFS_ERROR(EBADF); |
995 | ||
f37ea149 | 996 | if (!S_ISREG(inode->i_mode)) |
1da177e4 LT |
997 | return -XFS_ERROR(EINVAL); |
998 | ||
999 | if (copy_from_user(&bf, arg, sizeof(bf))) | |
1000 | return -XFS_ERROR(EFAULT); | |
1001 | ||
1002 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) | |
1003 | attr_flags |= ATTR_NONBLOCK; | |
1004 | if (ioflags & IO_INVIS) | |
1005 | attr_flags |= ATTR_DMI; | |
1006 | ||
993386c1 | 1007 | error = xfs_change_file_space(ip, cmd, &bf, filp->f_pos, |
1da177e4 LT |
1008 | NULL, attr_flags); |
1009 | return -error; | |
1010 | } | |
1011 | ||
1012 | STATIC int | |
1013 | xfs_ioc_bulkstat( | |
1014 | xfs_mount_t *mp, | |
1015 | unsigned int cmd, | |
1016 | void __user *arg) | |
1017 | { | |
1018 | xfs_fsop_bulkreq_t bulkreq; | |
1019 | int count; /* # of records returned */ | |
1020 | xfs_ino_t inlast; /* last inode number */ | |
1021 | int done; | |
1022 | int error; | |
1023 | ||
1024 | /* done = 1 if there are more stats to get and if bulkstat */ | |
1025 | /* should be called again (unused here, but used in dmapi) */ | |
1026 | ||
1027 | if (!capable(CAP_SYS_ADMIN)) | |
1028 | return -EPERM; | |
1029 | ||
1030 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1031 | return -XFS_ERROR(EIO); | |
1032 | ||
1033 | if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) | |
1034 | return -XFS_ERROR(EFAULT); | |
1035 | ||
1036 | if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) | |
1037 | return -XFS_ERROR(EFAULT); | |
1038 | ||
1039 | if ((count = bulkreq.icount) <= 0) | |
1040 | return -XFS_ERROR(EINVAL); | |
1041 | ||
1042 | if (cmd == XFS_IOC_FSINUMBERS) | |
1043 | error = xfs_inumbers(mp, &inlast, &count, | |
faa63e95 | 1044 | bulkreq.ubuffer, xfs_inumbers_fmt); |
1da177e4 LT |
1045 | else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
1046 | error = xfs_bulkstat_single(mp, &inlast, | |
1047 | bulkreq.ubuffer, &done); | |
1048 | else { /* XFS_IOC_FSBULKSTAT */ | |
1049 | if (count == 1 && inlast != 0) { | |
1050 | inlast++; | |
1051 | error = xfs_bulkstat_single(mp, &inlast, | |
1052 | bulkreq.ubuffer, &done); | |
1053 | } else { | |
1054 | error = xfs_bulkstat(mp, &inlast, &count, | |
1055 | (bulkstat_one_pf)xfs_bulkstat_one, NULL, | |
1056 | sizeof(xfs_bstat_t), bulkreq.ubuffer, | |
1057 | BULKSTAT_FG_QUICK, &done); | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | if (error) | |
1062 | return -error; | |
1063 | ||
1064 | if (bulkreq.ocount != NULL) { | |
1065 | if (copy_to_user(bulkreq.lastip, &inlast, | |
1066 | sizeof(xfs_ino_t))) | |
1067 | return -XFS_ERROR(EFAULT); | |
1068 | ||
1069 | if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) | |
1070 | return -XFS_ERROR(EFAULT); | |
1071 | } | |
1072 | ||
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | STATIC int | |
1077 | xfs_ioc_fsgeometry_v1( | |
1078 | xfs_mount_t *mp, | |
1079 | void __user *arg) | |
1080 | { | |
1081 | xfs_fsop_geom_v1_t fsgeo; | |
1082 | int error; | |
1083 | ||
1084 | error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3); | |
1085 | if (error) | |
1086 | return -error; | |
1087 | ||
1088 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) | |
1089 | return -XFS_ERROR(EFAULT); | |
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | STATIC int | |
1094 | xfs_ioc_fsgeometry( | |
1095 | xfs_mount_t *mp, | |
1096 | void __user *arg) | |
1097 | { | |
1098 | xfs_fsop_geom_t fsgeo; | |
1099 | int error; | |
1100 | ||
1101 | error = xfs_fs_geometry(mp, &fsgeo, 4); | |
1102 | if (error) | |
1103 | return -error; | |
1104 | ||
1105 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) | |
1106 | return -XFS_ERROR(EFAULT); | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Linux extended inode flags interface. | |
1112 | */ | |
1da177e4 LT |
1113 | |
1114 | STATIC unsigned int | |
1115 | xfs_merge_ioc_xflags( | |
1116 | unsigned int flags, | |
1117 | unsigned int start) | |
1118 | { | |
1119 | unsigned int xflags = start; | |
1120 | ||
39058a0e | 1121 | if (flags & FS_IMMUTABLE_FL) |
1da177e4 LT |
1122 | xflags |= XFS_XFLAG_IMMUTABLE; |
1123 | else | |
1124 | xflags &= ~XFS_XFLAG_IMMUTABLE; | |
39058a0e | 1125 | if (flags & FS_APPEND_FL) |
1da177e4 LT |
1126 | xflags |= XFS_XFLAG_APPEND; |
1127 | else | |
1128 | xflags &= ~XFS_XFLAG_APPEND; | |
39058a0e | 1129 | if (flags & FS_SYNC_FL) |
1da177e4 LT |
1130 | xflags |= XFS_XFLAG_SYNC; |
1131 | else | |
1132 | xflags &= ~XFS_XFLAG_SYNC; | |
39058a0e | 1133 | if (flags & FS_NOATIME_FL) |
1da177e4 LT |
1134 | xflags |= XFS_XFLAG_NOATIME; |
1135 | else | |
1136 | xflags &= ~XFS_XFLAG_NOATIME; | |
39058a0e | 1137 | if (flags & FS_NODUMP_FL) |
1da177e4 LT |
1138 | xflags |= XFS_XFLAG_NODUMP; |
1139 | else | |
1140 | xflags &= ~XFS_XFLAG_NODUMP; | |
1141 | ||
1142 | return xflags; | |
1143 | } | |
1144 | ||
1145 | STATIC unsigned int | |
1146 | xfs_di2lxflags( | |
1147 | __uint16_t di_flags) | |
1148 | { | |
1149 | unsigned int flags = 0; | |
1150 | ||
1151 | if (di_flags & XFS_DIFLAG_IMMUTABLE) | |
39058a0e | 1152 | flags |= FS_IMMUTABLE_FL; |
1da177e4 | 1153 | if (di_flags & XFS_DIFLAG_APPEND) |
39058a0e | 1154 | flags |= FS_APPEND_FL; |
1da177e4 | 1155 | if (di_flags & XFS_DIFLAG_SYNC) |
39058a0e | 1156 | flags |= FS_SYNC_FL; |
1da177e4 | 1157 | if (di_flags & XFS_DIFLAG_NOATIME) |
39058a0e | 1158 | flags |= FS_NOATIME_FL; |
1da177e4 | 1159 | if (di_flags & XFS_DIFLAG_NODUMP) |
39058a0e | 1160 | flags |= FS_NODUMP_FL; |
1da177e4 LT |
1161 | return flags; |
1162 | } | |
1163 | ||
1164 | STATIC int | |
1165 | xfs_ioc_xattr( | |
67fcaa73 | 1166 | bhv_vnode_t *vp, |
1da177e4 LT |
1167 | xfs_inode_t *ip, |
1168 | struct file *filp, | |
1169 | unsigned int cmd, | |
1170 | void __user *arg) | |
1171 | { | |
1172 | struct fsxattr fa; | |
8285fb58 | 1173 | struct bhv_vattr *vattr; |
220b5284 | 1174 | int error = 0; |
1da177e4 LT |
1175 | int attr_flags; |
1176 | unsigned int flags; | |
1177 | ||
220b5284 NS |
1178 | vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
1179 | if (unlikely(!vattr)) | |
1180 | return -ENOMEM; | |
1181 | ||
1da177e4 LT |
1182 | switch (cmd) { |
1183 | case XFS_IOC_FSGETXATTR: { | |
220b5284 NS |
1184 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \ |
1185 | XFS_AT_NEXTENTS | XFS_AT_PROJID; | |
739bfb2a | 1186 | error = xfs_getattr(ip, vattr, 0); |
220b5284 NS |
1187 | if (unlikely(error)) { |
1188 | error = -error; | |
1189 | break; | |
1190 | } | |
1da177e4 | 1191 | |
220b5284 NS |
1192 | fa.fsx_xflags = vattr->va_xflags; |
1193 | fa.fsx_extsize = vattr->va_extsize; | |
1194 | fa.fsx_nextents = vattr->va_nextents; | |
1195 | fa.fsx_projid = vattr->va_projid; | |
1da177e4 | 1196 | |
220b5284 NS |
1197 | if (copy_to_user(arg, &fa, sizeof(fa))) { |
1198 | error = -EFAULT; | |
1199 | break; | |
1200 | } | |
1201 | break; | |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | case XFS_IOC_FSSETXATTR: { | |
220b5284 NS |
1205 | if (copy_from_user(&fa, arg, sizeof(fa))) { |
1206 | error = -EFAULT; | |
1207 | break; | |
1208 | } | |
1da177e4 LT |
1209 | |
1210 | attr_flags = 0; | |
1211 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) | |
1212 | attr_flags |= ATTR_NONBLOCK; | |
1213 | ||
220b5284 NS |
1214 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | XFS_AT_PROJID; |
1215 | vattr->va_xflags = fa.fsx_xflags; | |
1216 | vattr->va_extsize = fa.fsx_extsize; | |
1217 | vattr->va_projid = fa.fsx_projid; | |
1da177e4 | 1218 | |
739bfb2a | 1219 | error = xfs_setattr(ip, vattr, attr_flags, NULL); |
220b5284 NS |
1220 | if (likely(!error)) |
1221 | __vn_revalidate(vp, vattr); /* update flags */ | |
1222 | error = -error; | |
1223 | break; | |
1da177e4 LT |
1224 | } |
1225 | ||
1226 | case XFS_IOC_FSGETXATTRA: { | |
220b5284 NS |
1227 | vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | \ |
1228 | XFS_AT_ANEXTENTS | XFS_AT_PROJID; | |
739bfb2a | 1229 | error = xfs_getattr(ip, vattr, 0); |
220b5284 NS |
1230 | if (unlikely(error)) { |
1231 | error = -error; | |
1232 | break; | |
1233 | } | |
1da177e4 | 1234 | |
220b5284 NS |
1235 | fa.fsx_xflags = vattr->va_xflags; |
1236 | fa.fsx_extsize = vattr->va_extsize; | |
1237 | fa.fsx_nextents = vattr->va_anextents; | |
1238 | fa.fsx_projid = vattr->va_projid; | |
1da177e4 | 1239 | |
220b5284 NS |
1240 | if (copy_to_user(arg, &fa, sizeof(fa))) { |
1241 | error = -EFAULT; | |
1242 | break; | |
1243 | } | |
1244 | break; | |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | case XFS_IOC_GETXFLAGS: { | |
1248 | flags = xfs_di2lxflags(ip->i_d.di_flags); | |
1249 | if (copy_to_user(arg, &flags, sizeof(flags))) | |
220b5284 NS |
1250 | error = -EFAULT; |
1251 | break; | |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | case XFS_IOC_SETXFLAGS: { | |
220b5284 NS |
1255 | if (copy_from_user(&flags, arg, sizeof(flags))) { |
1256 | error = -EFAULT; | |
1257 | break; | |
1258 | } | |
1da177e4 | 1259 | |
39058a0e ES |
1260 | if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ |
1261 | FS_NOATIME_FL | FS_NODUMP_FL | \ | |
1262 | FS_SYNC_FL)) { | |
220b5284 NS |
1263 | error = -EOPNOTSUPP; |
1264 | break; | |
1265 | } | |
1da177e4 LT |
1266 | |
1267 | attr_flags = 0; | |
1268 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) | |
1269 | attr_flags |= ATTR_NONBLOCK; | |
1270 | ||
220b5284 NS |
1271 | vattr->va_mask = XFS_AT_XFLAGS; |
1272 | vattr->va_xflags = xfs_merge_ioc_xflags(flags, | |
1273 | xfs_ip2xflags(ip)); | |
1da177e4 | 1274 | |
739bfb2a | 1275 | error = xfs_setattr(ip, vattr, attr_flags, NULL); |
220b5284 NS |
1276 | if (likely(!error)) |
1277 | __vn_revalidate(vp, vattr); /* update flags */ | |
1278 | error = -error; | |
1279 | break; | |
1da177e4 LT |
1280 | } |
1281 | ||
1da177e4 | 1282 | default: |
220b5284 NS |
1283 | error = -ENOTTY; |
1284 | break; | |
1da177e4 | 1285 | } |
220b5284 NS |
1286 | |
1287 | kfree(vattr); | |
1288 | return error; | |
1da177e4 LT |
1289 | } |
1290 | ||
1291 | STATIC int | |
1292 | xfs_ioc_getbmap( | |
993386c1 | 1293 | struct xfs_inode *ip, |
1da177e4 LT |
1294 | int ioflags, |
1295 | unsigned int cmd, | |
1296 | void __user *arg) | |
1297 | { | |
1298 | struct getbmap bm; | |
1299 | int iflags; | |
1300 | int error; | |
1301 | ||
1302 | if (copy_from_user(&bm, arg, sizeof(bm))) | |
1303 | return -XFS_ERROR(EFAULT); | |
1304 | ||
1305 | if (bm.bmv_count < 2) | |
1306 | return -XFS_ERROR(EINVAL); | |
1307 | ||
1308 | iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); | |
1309 | if (ioflags & IO_INVIS) | |
1310 | iflags |= BMV_IF_NO_DMAPI_READ; | |
1311 | ||
993386c1 | 1312 | error = xfs_getbmap(ip, &bm, (struct getbmap __user *)arg+1, iflags); |
1da177e4 LT |
1313 | if (error) |
1314 | return -error; | |
1315 | ||
1316 | if (copy_to_user(arg, &bm, sizeof(bm))) | |
1317 | return -XFS_ERROR(EFAULT); | |
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | STATIC int | |
1322 | xfs_ioc_getbmapx( | |
993386c1 | 1323 | struct xfs_inode *ip, |
1da177e4 LT |
1324 | void __user *arg) |
1325 | { | |
1326 | struct getbmapx bmx; | |
1327 | struct getbmap bm; | |
1328 | int iflags; | |
1329 | int error; | |
1330 | ||
1331 | if (copy_from_user(&bmx, arg, sizeof(bmx))) | |
1332 | return -XFS_ERROR(EFAULT); | |
1333 | ||
1334 | if (bmx.bmv_count < 2) | |
1335 | return -XFS_ERROR(EINVAL); | |
1336 | ||
1337 | /* | |
1338 | * Map input getbmapx structure to a getbmap | |
1339 | * structure for xfs_getbmap. | |
1340 | */ | |
1341 | GETBMAP_CONVERT(bmx, bm); | |
1342 | ||
1343 | iflags = bmx.bmv_iflags; | |
1344 | ||
1345 | if (iflags & (~BMV_IF_VALID)) | |
1346 | return -XFS_ERROR(EINVAL); | |
1347 | ||
1348 | iflags |= BMV_IF_EXTENDED; | |
1349 | ||
993386c1 | 1350 | error = xfs_getbmap(ip, &bm, (struct getbmapx __user *)arg+1, iflags); |
1da177e4 LT |
1351 | if (error) |
1352 | return -error; | |
1353 | ||
1354 | GETBMAP_CONVERT(bm, bmx); | |
1355 | ||
1356 | if (copy_to_user(arg, &bmx, sizeof(bmx))) | |
1357 | return -XFS_ERROR(EFAULT); | |
1358 | ||
1359 | return 0; | |
1360 | } |