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" | |
993386c1 | 50 | #include "xfs_vnodeops.h" |
25fe55e8 CH |
51 | #include "xfs_quota.h" |
52 | #include "xfs_inode_item.h" | |
1da177e4 | 53 | |
16f7e0fe | 54 | #include <linux/capability.h> |
1da177e4 LT |
55 | #include <linux/dcache.h> |
56 | #include <linux/mount.h> | |
57 | #include <linux/namei.h> | |
58 | #include <linux/pagemap.h> | |
59 | ||
60 | /* | |
61 | * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to | |
62 | * a file or fs handle. | |
63 | * | |
64 | * XFS_IOC_PATH_TO_FSHANDLE | |
65 | * returns fs handle for a mount point or path within that mount point | |
66 | * XFS_IOC_FD_TO_HANDLE | |
67 | * returns full handle for a FD opened in user space | |
68 | * XFS_IOC_PATH_TO_HANDLE | |
69 | * returns full handle for a path | |
70 | */ | |
71 | STATIC int | |
72 | xfs_find_handle( | |
73 | unsigned int cmd, | |
74 | void __user *arg) | |
75 | { | |
76 | int hsize; | |
77 | xfs_handle_t handle; | |
78 | xfs_fsop_handlereq_t hreq; | |
79 | struct inode *inode; | |
1da177e4 LT |
80 | |
81 | if (copy_from_user(&hreq, arg, sizeof(hreq))) | |
82 | return -XFS_ERROR(EFAULT); | |
83 | ||
84 | memset((char *)&handle, 0, sizeof(handle)); | |
85 | ||
86 | switch (cmd) { | |
87 | case XFS_IOC_PATH_TO_FSHANDLE: | |
88 | case XFS_IOC_PATH_TO_HANDLE: { | |
2d8f3038 AV |
89 | struct path path; |
90 | int error = user_lpath((const char __user *)hreq.path, &path); | |
1da177e4 LT |
91 | if (error) |
92 | return error; | |
93 | ||
2d8f3038 AV |
94 | ASSERT(path.dentry); |
95 | ASSERT(path.dentry->d_inode); | |
96 | inode = igrab(path.dentry->d_inode); | |
97 | path_put(&path); | |
1da177e4 LT |
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 | ||
136 | /* now we can grab the fsid */ | |
0ce4cfd4 | 137 | memcpy(&handle.ha_fsid, XFS_I(inode)->i_mount->m_fixedfsid, |
2f6f7b3d | 138 | sizeof(xfs_fsid_t)); |
1da177e4 LT |
139 | hsize = sizeof(xfs_fsid_t); |
140 | ||
141 | if (cmd != XFS_IOC_PATH_TO_FSHANDLE) { | |
6e7f75ea | 142 | xfs_inode_t *ip = XFS_I(inode); |
1da177e4 LT |
143 | int lock_mode; |
144 | ||
145 | /* need to get access to the xfs_inode to read the generation */ | |
1da177e4 LT |
146 | lock_mode = xfs_ilock_map_shared(ip); |
147 | ||
148 | /* fill in fid section of handle from inode */ | |
c6143911 CH |
149 | handle.ha_fid.fid_len = sizeof(xfs_fid_t) - |
150 | sizeof(handle.ha_fid.fid_len); | |
151 | handle.ha_fid.fid_pad = 0; | |
152 | handle.ha_fid.fid_gen = ip->i_d.di_gen; | |
153 | handle.ha_fid.fid_ino = ip->i_ino; | |
1da177e4 LT |
154 | |
155 | xfs_iunlock_map_shared(ip, lock_mode); | |
156 | ||
157 | hsize = XFS_HSIZE(handle); | |
158 | } | |
159 | ||
160 | /* now copy our handle into the user buffer & write out the size */ | |
161 | if (copy_to_user(hreq.ohandle, &handle, hsize) || | |
162 | copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) { | |
163 | iput(inode); | |
164 | return -XFS_ERROR(EFAULT); | |
165 | } | |
166 | ||
167 | iput(inode); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | ||
172 | /* | |
6e7f75ea CH |
173 | * Convert userspace handle data into inode. |
174 | * | |
175 | * We use the fact that all the fsop_handlereq ioctl calls have a data | |
176 | * structure argument whose first component is always a xfs_fsop_handlereq_t, | |
177 | * so we can pass that sub structure into this handy, shared routine. | |
1da177e4 | 178 | * |
6e7f75ea | 179 | * If no error, caller must always iput the returned inode. |
1da177e4 LT |
180 | */ |
181 | STATIC int | |
182 | xfs_vget_fsop_handlereq( | |
183 | xfs_mount_t *mp, | |
184 | struct inode *parinode, /* parent inode pointer */ | |
185 | xfs_fsop_handlereq_t *hreq, | |
1da177e4 LT |
186 | struct inode **inode) |
187 | { | |
188 | void __user *hanp; | |
189 | size_t hlen; | |
190 | xfs_fid_t *xfid; | |
191 | xfs_handle_t *handlep; | |
192 | xfs_handle_t handle; | |
193 | xfs_inode_t *ip; | |
1da177e4 LT |
194 | xfs_ino_t ino; |
195 | __u32 igen; | |
196 | int error; | |
197 | ||
198 | /* | |
199 | * Only allow handle opens under a directory. | |
200 | */ | |
201 | if (!S_ISDIR(parinode->i_mode)) | |
202 | return XFS_ERROR(ENOTDIR); | |
203 | ||
204 | hanp = hreq->ihandle; | |
205 | hlen = hreq->ihandlen; | |
206 | handlep = &handle; | |
207 | ||
208 | if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep)) | |
209 | return XFS_ERROR(EINVAL); | |
210 | if (copy_from_user(handlep, hanp, hlen)) | |
211 | return XFS_ERROR(EFAULT); | |
212 | if (hlen < sizeof(*handlep)) | |
213 | memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen); | |
214 | if (hlen > sizeof(handlep->ha_fsid)) { | |
c6143911 CH |
215 | if (handlep->ha_fid.fid_len != |
216 | (hlen - sizeof(handlep->ha_fsid) - | |
217 | sizeof(handlep->ha_fid.fid_len)) || | |
218 | handlep->ha_fid.fid_pad) | |
1da177e4 LT |
219 | return XFS_ERROR(EINVAL); |
220 | } | |
221 | ||
222 | /* | |
223 | * Crack the handle, obtain the inode # & generation # | |
224 | */ | |
225 | xfid = (struct xfs_fid *)&handlep->ha_fid; | |
c6143911 CH |
226 | if (xfid->fid_len == sizeof(*xfid) - sizeof(xfid->fid_len)) { |
227 | ino = xfid->fid_ino; | |
228 | igen = xfid->fid_gen; | |
1da177e4 LT |
229 | } else { |
230 | return XFS_ERROR(EINVAL); | |
231 | } | |
232 | ||
233 | /* | |
6e7f75ea | 234 | * Get the XFS inode, building a Linux inode to go with it. |
1da177e4 LT |
235 | */ |
236 | error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0); | |
237 | if (error) | |
238 | return error; | |
239 | if (ip == NULL) | |
240 | return XFS_ERROR(EIO); | |
6a7f422d | 241 | if (ip->i_d.di_gen != igen) { |
1da177e4 LT |
242 | xfs_iput_new(ip, XFS_ILOCK_SHARED); |
243 | return XFS_ERROR(ENOENT); | |
244 | } | |
245 | ||
1da177e4 LT |
246 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
247 | ||
6e7f75ea | 248 | *inode = XFS_ITOV(ip); |
1da177e4 LT |
249 | return 0; |
250 | } | |
251 | ||
252 | STATIC int | |
253 | xfs_open_by_handle( | |
254 | xfs_mount_t *mp, | |
255 | void __user *arg, | |
256 | struct file *parfilp, | |
257 | struct inode *parinode) | |
258 | { | |
259 | int error; | |
260 | int new_fd; | |
261 | int permflag; | |
262 | struct file *filp; | |
263 | struct inode *inode; | |
264 | struct dentry *dentry; | |
1da177e4 LT |
265 | xfs_fsop_handlereq_t hreq; |
266 | ||
267 | if (!capable(CAP_SYS_ADMIN)) | |
268 | return -XFS_ERROR(EPERM); | |
269 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) | |
270 | return -XFS_ERROR(EFAULT); | |
271 | ||
6e7f75ea | 272 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode); |
1da177e4 LT |
273 | if (error) |
274 | return -error; | |
275 | ||
276 | /* Restrict xfs_open_by_handle to directories & regular files. */ | |
277 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { | |
278 | iput(inode); | |
279 | return -XFS_ERROR(EINVAL); | |
280 | } | |
281 | ||
282 | #if BITS_PER_LONG != 32 | |
283 | hreq.oflags |= O_LARGEFILE; | |
284 | #endif | |
285 | /* Put open permission in namei format. */ | |
286 | permflag = hreq.oflags; | |
287 | if ((permflag+1) & O_ACCMODE) | |
288 | permflag++; | |
289 | if (permflag & O_TRUNC) | |
290 | permflag |= 2; | |
291 | ||
292 | if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && | |
293 | (permflag & FMODE_WRITE) && IS_APPEND(inode)) { | |
294 | iput(inode); | |
295 | return -XFS_ERROR(EPERM); | |
296 | } | |
297 | ||
298 | if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) { | |
299 | iput(inode); | |
300 | return -XFS_ERROR(EACCES); | |
301 | } | |
302 | ||
303 | /* Can't write directories. */ | |
304 | if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) { | |
305 | iput(inode); | |
306 | return -XFS_ERROR(EISDIR); | |
307 | } | |
308 | ||
309 | if ((new_fd = get_unused_fd()) < 0) { | |
310 | iput(inode); | |
311 | return new_fd; | |
312 | } | |
313 | ||
314 | dentry = d_alloc_anon(inode); | |
315 | if (dentry == NULL) { | |
316 | iput(inode); | |
317 | put_unused_fd(new_fd); | |
318 | return -XFS_ERROR(ENOMEM); | |
319 | } | |
320 | ||
321 | /* Ensure umount returns EBUSY on umounts while this file is open. */ | |
e678fb0d | 322 | mntget(parfilp->f_path.mnt); |
1da177e4 LT |
323 | |
324 | /* Create file pointer. */ | |
e678fb0d | 325 | filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags); |
1da177e4 LT |
326 | if (IS_ERR(filp)) { |
327 | put_unused_fd(new_fd); | |
328 | return -XFS_ERROR(-PTR_ERR(filp)); | |
329 | } | |
2e2e7bb1 VA |
330 | if (inode->i_mode & S_IFREG) { |
331 | /* invisible operation should not change atime */ | |
332 | filp->f_flags |= O_NOATIME; | |
3562fd45 | 333 | filp->f_op = &xfs_invis_file_operations; |
2e2e7bb1 | 334 | } |
1da177e4 LT |
335 | |
336 | fd_install(new_fd, filp); | |
337 | return new_fd; | |
338 | } | |
339 | ||
804c83c3 CH |
340 | /* |
341 | * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's | |
342 | * unused first argument. | |
343 | */ | |
344 | STATIC int | |
345 | do_readlink( | |
346 | char __user *buffer, | |
347 | int buflen, | |
348 | const char *link) | |
349 | { | |
350 | int len; | |
351 | ||
352 | len = PTR_ERR(link); | |
353 | if (IS_ERR(link)) | |
354 | goto out; | |
355 | ||
356 | len = strlen(link); | |
357 | if (len > (unsigned) buflen) | |
358 | len = buflen; | |
359 | if (copy_to_user(buffer, link, len)) | |
360 | len = -EFAULT; | |
361 | out: | |
362 | return len; | |
363 | } | |
364 | ||
365 | ||
1da177e4 LT |
366 | STATIC int |
367 | xfs_readlink_by_handle( | |
368 | xfs_mount_t *mp, | |
369 | void __user *arg, | |
1da177e4 LT |
370 | struct inode *parinode) |
371 | { | |
1da177e4 LT |
372 | struct inode *inode; |
373 | xfs_fsop_handlereq_t hreq; | |
1da177e4 | 374 | __u32 olen; |
804c83c3 CH |
375 | void *link; |
376 | int error; | |
1da177e4 LT |
377 | |
378 | if (!capable(CAP_SYS_ADMIN)) | |
379 | return -XFS_ERROR(EPERM); | |
380 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) | |
381 | return -XFS_ERROR(EFAULT); | |
382 | ||
6e7f75ea | 383 | error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode); |
1da177e4 LT |
384 | if (error) |
385 | return -error; | |
386 | ||
387 | /* Restrict this handle operation to symlinks only. */ | |
0432dab2 | 388 | if (!S_ISLNK(inode->i_mode)) { |
804c83c3 CH |
389 | error = -XFS_ERROR(EINVAL); |
390 | goto out_iput; | |
1da177e4 LT |
391 | } |
392 | ||
393 | if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) { | |
804c83c3 CH |
394 | error = -XFS_ERROR(EFAULT); |
395 | goto out_iput; | |
1da177e4 | 396 | } |
1da177e4 | 397 | |
804c83c3 CH |
398 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
399 | if (!link) | |
400 | goto out_iput; | |
1da177e4 | 401 | |
739bfb2a | 402 | error = -xfs_readlink(XFS_I(inode), link); |
67fcaa73 | 403 | if (error) |
804c83c3 CH |
404 | goto out_kfree; |
405 | error = do_readlink(hreq.ohandle, olen, link); | |
406 | if (error) | |
407 | goto out_kfree; | |
67fcaa73 | 408 | |
804c83c3 CH |
409 | out_kfree: |
410 | kfree(link); | |
411 | out_iput: | |
412 | iput(inode); | |
413 | return error; | |
1da177e4 LT |
414 | } |
415 | ||
416 | STATIC int | |
417 | xfs_fssetdm_by_handle( | |
418 | xfs_mount_t *mp, | |
419 | void __user *arg, | |
1da177e4 LT |
420 | struct inode *parinode) |
421 | { | |
422 | int error; | |
423 | struct fsdmidata fsd; | |
424 | xfs_fsop_setdm_handlereq_t dmhreq; | |
425 | struct inode *inode; | |
1da177e4 LT |
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 | ||
6e7f75ea | 432 | error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &inode); |
1da177e4 LT |
433 | if (error) |
434 | return -error; | |
435 | ||
436 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) { | |
6e7f75ea CH |
437 | error = -XFS_ERROR(EPERM); |
438 | goto out; | |
1da177e4 LT |
439 | } |
440 | ||
441 | if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { | |
6e7f75ea CH |
442 | error = -XFS_ERROR(EFAULT); |
443 | goto out; | |
1da177e4 LT |
444 | } |
445 | ||
6e7f75ea CH |
446 | error = -xfs_set_dmattrs(XFS_I(inode), fsd.fsd_dmevmask, |
447 | fsd.fsd_dmstate); | |
1da177e4 | 448 | |
6e7f75ea CH |
449 | out: |
450 | iput(inode); | |
451 | return error; | |
1da177e4 LT |
452 | } |
453 | ||
454 | STATIC int | |
455 | xfs_attrlist_by_handle( | |
456 | xfs_mount_t *mp, | |
457 | void __user *arg, | |
1da177e4 LT |
458 | struct inode *parinode) |
459 | { | |
460 | int error; | |
461 | attrlist_cursor_kern_t *cursor; | |
462 | xfs_fsop_attrlist_handlereq_t al_hreq; | |
463 | struct inode *inode; | |
1da177e4 LT |
464 | char *kbuf; |
465 | ||
466 | if (!capable(CAP_SYS_ADMIN)) | |
467 | return -XFS_ERROR(EPERM); | |
468 | if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) | |
469 | return -XFS_ERROR(EFAULT); | |
470 | if (al_hreq.buflen > XATTR_LIST_MAX) | |
471 | return -XFS_ERROR(EINVAL); | |
472 | ||
90ad58a8 CH |
473 | /* |
474 | * Reject flags, only allow namespaces. | |
475 | */ | |
476 | if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) | |
477 | return -XFS_ERROR(EINVAL); | |
478 | ||
6e7f75ea | 479 | error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq, &inode); |
1da177e4 LT |
480 | if (error) |
481 | goto out; | |
482 | ||
483 | kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); | |
484 | if (!kbuf) | |
485 | goto out_vn_rele; | |
486 | ||
487 | cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; | |
739bfb2a CH |
488 | error = xfs_attr_list(XFS_I(inode), kbuf, al_hreq.buflen, |
489 | al_hreq.flags, cursor); | |
1da177e4 LT |
490 | if (error) |
491 | goto out_kfree; | |
492 | ||
493 | if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) | |
494 | error = -EFAULT; | |
495 | ||
496 | out_kfree: | |
497 | kfree(kbuf); | |
498 | out_vn_rele: | |
6e7f75ea | 499 | iput(inode); |
1da177e4 LT |
500 | out: |
501 | return -error; | |
502 | } | |
503 | ||
504 | STATIC int | |
505 | xfs_attrmulti_attr_get( | |
739bfb2a | 506 | struct inode *inode, |
1da177e4 LT |
507 | char *name, |
508 | char __user *ubuf, | |
509 | __uint32_t *len, | |
510 | __uint32_t flags) | |
511 | { | |
512 | char *kbuf; | |
513 | int error = EFAULT; | |
e8b0ebaa | 514 | |
1da177e4 LT |
515 | if (*len > XATTR_SIZE_MAX) |
516 | return EINVAL; | |
517 | kbuf = kmalloc(*len, GFP_KERNEL); | |
518 | if (!kbuf) | |
519 | return ENOMEM; | |
520 | ||
e8b0ebaa | 521 | error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); |
1da177e4 LT |
522 | if (error) |
523 | goto out_kfree; | |
524 | ||
525 | if (copy_to_user(ubuf, kbuf, *len)) | |
526 | error = EFAULT; | |
527 | ||
528 | out_kfree: | |
529 | kfree(kbuf); | |
530 | return error; | |
531 | } | |
532 | ||
533 | STATIC int | |
534 | xfs_attrmulti_attr_set( | |
739bfb2a | 535 | struct inode *inode, |
1da177e4 LT |
536 | char *name, |
537 | const char __user *ubuf, | |
538 | __uint32_t len, | |
539 | __uint32_t flags) | |
540 | { | |
541 | char *kbuf; | |
542 | int error = EFAULT; | |
543 | ||
739bfb2a | 544 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
1da177e4 LT |
545 | return EPERM; |
546 | if (len > XATTR_SIZE_MAX) | |
547 | return EINVAL; | |
548 | ||
549 | kbuf = kmalloc(len, GFP_KERNEL); | |
550 | if (!kbuf) | |
551 | return ENOMEM; | |
552 | ||
553 | if (copy_from_user(kbuf, ubuf, len)) | |
554 | goto out_kfree; | |
e8b0ebaa | 555 | |
739bfb2a | 556 | error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); |
1da177e4 LT |
557 | |
558 | out_kfree: | |
559 | kfree(kbuf); | |
560 | return error; | |
561 | } | |
562 | ||
563 | STATIC int | |
564 | xfs_attrmulti_attr_remove( | |
739bfb2a | 565 | struct inode *inode, |
1da177e4 LT |
566 | char *name, |
567 | __uint32_t flags) | |
568 | { | |
739bfb2a | 569 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
1da177e4 | 570 | return EPERM; |
739bfb2a | 571 | return xfs_attr_remove(XFS_I(inode), name, flags); |
1da177e4 LT |
572 | } |
573 | ||
574 | STATIC int | |
575 | xfs_attrmulti_by_handle( | |
576 | xfs_mount_t *mp, | |
577 | void __user *arg, | |
42a74f20 | 578 | struct file *parfilp, |
1da177e4 LT |
579 | struct inode *parinode) |
580 | { | |
581 | int error; | |
582 | xfs_attr_multiop_t *ops; | |
583 | xfs_fsop_attrmulti_handlereq_t am_hreq; | |
584 | struct inode *inode; | |
1da177e4 LT |
585 | unsigned int i, size; |
586 | char *attr_name; | |
587 | ||
588 | if (!capable(CAP_SYS_ADMIN)) | |
589 | return -XFS_ERROR(EPERM); | |
590 | if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) | |
591 | return -XFS_ERROR(EFAULT); | |
592 | ||
6e7f75ea | 593 | error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &inode); |
1da177e4 LT |
594 | if (error) |
595 | goto out; | |
596 | ||
597 | error = E2BIG; | |
e182f57a | 598 | size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); |
1da177e4 LT |
599 | if (!size || size > 16 * PAGE_SIZE) |
600 | goto out_vn_rele; | |
601 | ||
602 | error = ENOMEM; | |
603 | ops = kmalloc(size, GFP_KERNEL); | |
604 | if (!ops) | |
605 | goto out_vn_rele; | |
606 | ||
607 | error = EFAULT; | |
608 | if (copy_from_user(ops, am_hreq.ops, size)) | |
609 | goto out_kfree_ops; | |
610 | ||
611 | attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); | |
612 | if (!attr_name) | |
613 | goto out_kfree_ops; | |
614 | ||
615 | ||
616 | error = 0; | |
617 | for (i = 0; i < am_hreq.opcount; i++) { | |
618 | ops[i].am_error = strncpy_from_user(attr_name, | |
619 | ops[i].am_attrname, MAXNAMELEN); | |
620 | if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) | |
621 | error = -ERANGE; | |
622 | if (ops[i].am_error < 0) | |
623 | break; | |
624 | ||
625 | switch (ops[i].am_opcode) { | |
626 | case ATTR_OP_GET: | |
739bfb2a | 627 | ops[i].am_error = xfs_attrmulti_attr_get(inode, |
1da177e4 LT |
628 | attr_name, ops[i].am_attrvalue, |
629 | &ops[i].am_length, ops[i].am_flags); | |
630 | break; | |
631 | case ATTR_OP_SET: | |
42a74f20 DH |
632 | ops[i].am_error = mnt_want_write(parfilp->f_path.mnt); |
633 | if (ops[i].am_error) | |
634 | break; | |
739bfb2a | 635 | ops[i].am_error = xfs_attrmulti_attr_set(inode, |
1da177e4 LT |
636 | attr_name, ops[i].am_attrvalue, |
637 | ops[i].am_length, ops[i].am_flags); | |
42a74f20 | 638 | mnt_drop_write(parfilp->f_path.mnt); |
1da177e4 LT |
639 | break; |
640 | case ATTR_OP_REMOVE: | |
42a74f20 DH |
641 | ops[i].am_error = mnt_want_write(parfilp->f_path.mnt); |
642 | if (ops[i].am_error) | |
643 | break; | |
739bfb2a | 644 | ops[i].am_error = xfs_attrmulti_attr_remove(inode, |
1da177e4 | 645 | attr_name, ops[i].am_flags); |
42a74f20 | 646 | mnt_drop_write(parfilp->f_path.mnt); |
1da177e4 LT |
647 | break; |
648 | default: | |
649 | ops[i].am_error = EINVAL; | |
650 | } | |
651 | } | |
652 | ||
653 | if (copy_to_user(am_hreq.ops, ops, size)) | |
654 | error = XFS_ERROR(EFAULT); | |
655 | ||
656 | kfree(attr_name); | |
657 | out_kfree_ops: | |
658 | kfree(ops); | |
659 | out_vn_rele: | |
6e7f75ea | 660 | iput(inode); |
1da177e4 LT |
661 | out: |
662 | return -error; | |
663 | } | |
664 | ||
1da177e4 LT |
665 | STATIC int |
666 | xfs_ioc_space( | |
993386c1 | 667 | struct xfs_inode *ip, |
f37ea149 | 668 | struct inode *inode, |
1da177e4 LT |
669 | struct file *filp, |
670 | int ioflags, | |
671 | unsigned int cmd, | |
672 | void __user *arg) | |
673 | { | |
674 | xfs_flock64_t bf; | |
675 | int attr_flags = 0; | |
676 | int error; | |
677 | ||
f37ea149 | 678 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) |
1da177e4 LT |
679 | return -XFS_ERROR(EPERM); |
680 | ||
ad4a8ac4 | 681 | if (!(filp->f_mode & FMODE_WRITE)) |
1da177e4 LT |
682 | return -XFS_ERROR(EBADF); |
683 | ||
f37ea149 | 684 | if (!S_ISREG(inode->i_mode)) |
1da177e4 LT |
685 | return -XFS_ERROR(EINVAL); |
686 | ||
687 | if (copy_from_user(&bf, arg, sizeof(bf))) | |
688 | return -XFS_ERROR(EFAULT); | |
689 | ||
690 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) | |
0f285c8a | 691 | attr_flags |= XFS_ATTR_NONBLOCK; |
1da177e4 | 692 | if (ioflags & IO_INVIS) |
0f285c8a | 693 | attr_flags |= XFS_ATTR_DMI; |
1da177e4 | 694 | |
993386c1 | 695 | error = xfs_change_file_space(ip, cmd, &bf, filp->f_pos, |
1da177e4 LT |
696 | NULL, attr_flags); |
697 | return -error; | |
698 | } | |
699 | ||
700 | STATIC int | |
701 | xfs_ioc_bulkstat( | |
702 | xfs_mount_t *mp, | |
703 | unsigned int cmd, | |
704 | void __user *arg) | |
705 | { | |
706 | xfs_fsop_bulkreq_t bulkreq; | |
707 | int count; /* # of records returned */ | |
708 | xfs_ino_t inlast; /* last inode number */ | |
709 | int done; | |
710 | int error; | |
711 | ||
712 | /* done = 1 if there are more stats to get and if bulkstat */ | |
713 | /* should be called again (unused here, but used in dmapi) */ | |
714 | ||
715 | if (!capable(CAP_SYS_ADMIN)) | |
716 | return -EPERM; | |
717 | ||
718 | if (XFS_FORCED_SHUTDOWN(mp)) | |
719 | return -XFS_ERROR(EIO); | |
720 | ||
721 | if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) | |
722 | return -XFS_ERROR(EFAULT); | |
723 | ||
724 | if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) | |
725 | return -XFS_ERROR(EFAULT); | |
726 | ||
727 | if ((count = bulkreq.icount) <= 0) | |
728 | return -XFS_ERROR(EINVAL); | |
729 | ||
cd57e594 LM |
730 | if (bulkreq.ubuffer == NULL) |
731 | return -XFS_ERROR(EINVAL); | |
732 | ||
1da177e4 LT |
733 | if (cmd == XFS_IOC_FSINUMBERS) |
734 | error = xfs_inumbers(mp, &inlast, &count, | |
faa63e95 | 735 | bulkreq.ubuffer, xfs_inumbers_fmt); |
1da177e4 LT |
736 | else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
737 | error = xfs_bulkstat_single(mp, &inlast, | |
738 | bulkreq.ubuffer, &done); | |
cd57e594 LM |
739 | else /* XFS_IOC_FSBULKSTAT */ |
740 | error = xfs_bulkstat(mp, &inlast, &count, | |
741 | (bulkstat_one_pf)xfs_bulkstat_one, NULL, | |
742 | sizeof(xfs_bstat_t), bulkreq.ubuffer, | |
743 | BULKSTAT_FG_QUICK, &done); | |
1da177e4 LT |
744 | |
745 | if (error) | |
746 | return -error; | |
747 | ||
748 | if (bulkreq.ocount != NULL) { | |
749 | if (copy_to_user(bulkreq.lastip, &inlast, | |
750 | sizeof(xfs_ino_t))) | |
751 | return -XFS_ERROR(EFAULT); | |
752 | ||
753 | if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) | |
754 | return -XFS_ERROR(EFAULT); | |
755 | } | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | STATIC int | |
761 | xfs_ioc_fsgeometry_v1( | |
762 | xfs_mount_t *mp, | |
763 | void __user *arg) | |
764 | { | |
765 | xfs_fsop_geom_v1_t fsgeo; | |
766 | int error; | |
767 | ||
768 | error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3); | |
769 | if (error) | |
770 | return -error; | |
771 | ||
772 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) | |
773 | return -XFS_ERROR(EFAULT); | |
774 | return 0; | |
775 | } | |
776 | ||
777 | STATIC int | |
778 | xfs_ioc_fsgeometry( | |
779 | xfs_mount_t *mp, | |
780 | void __user *arg) | |
781 | { | |
782 | xfs_fsop_geom_t fsgeo; | |
783 | int error; | |
784 | ||
785 | error = xfs_fs_geometry(mp, &fsgeo, 4); | |
786 | if (error) | |
787 | return -error; | |
788 | ||
789 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) | |
790 | return -XFS_ERROR(EFAULT); | |
791 | return 0; | |
792 | } | |
793 | ||
794 | /* | |
795 | * Linux extended inode flags interface. | |
796 | */ | |
1da177e4 LT |
797 | |
798 | STATIC unsigned int | |
799 | xfs_merge_ioc_xflags( | |
800 | unsigned int flags, | |
801 | unsigned int start) | |
802 | { | |
803 | unsigned int xflags = start; | |
804 | ||
39058a0e | 805 | if (flags & FS_IMMUTABLE_FL) |
1da177e4 LT |
806 | xflags |= XFS_XFLAG_IMMUTABLE; |
807 | else | |
808 | xflags &= ~XFS_XFLAG_IMMUTABLE; | |
39058a0e | 809 | if (flags & FS_APPEND_FL) |
1da177e4 LT |
810 | xflags |= XFS_XFLAG_APPEND; |
811 | else | |
812 | xflags &= ~XFS_XFLAG_APPEND; | |
39058a0e | 813 | if (flags & FS_SYNC_FL) |
1da177e4 LT |
814 | xflags |= XFS_XFLAG_SYNC; |
815 | else | |
816 | xflags &= ~XFS_XFLAG_SYNC; | |
39058a0e | 817 | if (flags & FS_NOATIME_FL) |
1da177e4 LT |
818 | xflags |= XFS_XFLAG_NOATIME; |
819 | else | |
820 | xflags &= ~XFS_XFLAG_NOATIME; | |
39058a0e | 821 | if (flags & FS_NODUMP_FL) |
1da177e4 LT |
822 | xflags |= XFS_XFLAG_NODUMP; |
823 | else | |
824 | xflags &= ~XFS_XFLAG_NODUMP; | |
825 | ||
826 | return xflags; | |
827 | } | |
828 | ||
829 | STATIC unsigned int | |
830 | xfs_di2lxflags( | |
831 | __uint16_t di_flags) | |
832 | { | |
833 | unsigned int flags = 0; | |
834 | ||
835 | if (di_flags & XFS_DIFLAG_IMMUTABLE) | |
39058a0e | 836 | flags |= FS_IMMUTABLE_FL; |
1da177e4 | 837 | if (di_flags & XFS_DIFLAG_APPEND) |
39058a0e | 838 | flags |= FS_APPEND_FL; |
1da177e4 | 839 | if (di_flags & XFS_DIFLAG_SYNC) |
39058a0e | 840 | flags |= FS_SYNC_FL; |
1da177e4 | 841 | if (di_flags & XFS_DIFLAG_NOATIME) |
39058a0e | 842 | flags |= FS_NOATIME_FL; |
1da177e4 | 843 | if (di_flags & XFS_DIFLAG_NODUMP) |
39058a0e | 844 | flags |= FS_NODUMP_FL; |
1da177e4 LT |
845 | return flags; |
846 | } | |
847 | ||
c83bfab1 CH |
848 | STATIC int |
849 | xfs_ioc_fsgetxattr( | |
850 | xfs_inode_t *ip, | |
851 | int attr, | |
852 | void __user *arg) | |
853 | { | |
854 | struct fsxattr fa; | |
855 | ||
856 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
857 | fa.fsx_xflags = xfs_ip2xflags(ip); | |
858 | fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; | |
859 | fa.fsx_projid = ip->i_d.di_projid; | |
860 | ||
861 | if (attr) { | |
862 | if (ip->i_afp) { | |
863 | if (ip->i_afp->if_flags & XFS_IFEXTENTS) | |
864 | fa.fsx_nextents = ip->i_afp->if_bytes / | |
865 | sizeof(xfs_bmbt_rec_t); | |
866 | else | |
867 | fa.fsx_nextents = ip->i_d.di_anextents; | |
868 | } else | |
869 | fa.fsx_nextents = 0; | |
870 | } else { | |
871 | if (ip->i_df.if_flags & XFS_IFEXTENTS) | |
872 | fa.fsx_nextents = ip->i_df.if_bytes / | |
873 | sizeof(xfs_bmbt_rec_t); | |
874 | else | |
875 | fa.fsx_nextents = ip->i_d.di_nextents; | |
876 | } | |
877 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
878 | ||
879 | if (copy_to_user(arg, &fa, sizeof(fa))) | |
880 | return -EFAULT; | |
881 | return 0; | |
882 | } | |
883 | ||
25fe55e8 CH |
884 | STATIC void |
885 | xfs_set_diflags( | |
886 | struct xfs_inode *ip, | |
887 | unsigned int xflags) | |
888 | { | |
889 | unsigned int di_flags; | |
890 | ||
891 | /* can't set PREALLOC this way, just preserve it */ | |
892 | di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); | |
893 | if (xflags & XFS_XFLAG_IMMUTABLE) | |
894 | di_flags |= XFS_DIFLAG_IMMUTABLE; | |
895 | if (xflags & XFS_XFLAG_APPEND) | |
896 | di_flags |= XFS_DIFLAG_APPEND; | |
897 | if (xflags & XFS_XFLAG_SYNC) | |
898 | di_flags |= XFS_DIFLAG_SYNC; | |
899 | if (xflags & XFS_XFLAG_NOATIME) | |
900 | di_flags |= XFS_DIFLAG_NOATIME; | |
901 | if (xflags & XFS_XFLAG_NODUMP) | |
902 | di_flags |= XFS_DIFLAG_NODUMP; | |
903 | if (xflags & XFS_XFLAG_PROJINHERIT) | |
904 | di_flags |= XFS_DIFLAG_PROJINHERIT; | |
905 | if (xflags & XFS_XFLAG_NODEFRAG) | |
906 | di_flags |= XFS_DIFLAG_NODEFRAG; | |
907 | if (xflags & XFS_XFLAG_FILESTREAM) | |
908 | di_flags |= XFS_DIFLAG_FILESTREAM; | |
909 | if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { | |
910 | if (xflags & XFS_XFLAG_RTINHERIT) | |
911 | di_flags |= XFS_DIFLAG_RTINHERIT; | |
912 | if (xflags & XFS_XFLAG_NOSYMLINKS) | |
913 | di_flags |= XFS_DIFLAG_NOSYMLINKS; | |
914 | if (xflags & XFS_XFLAG_EXTSZINHERIT) | |
915 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; | |
916 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) { | |
917 | if (xflags & XFS_XFLAG_REALTIME) | |
918 | di_flags |= XFS_DIFLAG_REALTIME; | |
919 | if (xflags & XFS_XFLAG_EXTSIZE) | |
920 | di_flags |= XFS_DIFLAG_EXTSIZE; | |
921 | } | |
922 | ||
923 | ip->i_d.di_flags = di_flags; | |
924 | } | |
925 | ||
926 | ||
927 | #define FSX_PROJID 1 | |
928 | #define FSX_EXTSIZE 2 | |
929 | #define FSX_XFLAGS 4 | |
930 | #define FSX_NONBLOCK 8 | |
931 | ||
932 | STATIC int | |
933 | xfs_ioctl_setattr( | |
934 | xfs_inode_t *ip, | |
935 | struct fsxattr *fa, | |
936 | int mask) | |
937 | { | |
938 | struct xfs_mount *mp = ip->i_mount; | |
939 | struct xfs_trans *tp; | |
940 | unsigned int lock_flags = 0; | |
941 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; | |
942 | struct xfs_dquot *olddquot = NULL; | |
943 | int code; | |
944 | ||
945 | xfs_itrace_entry(ip); | |
946 | ||
947 | if (mp->m_flags & XFS_MOUNT_RDONLY) | |
948 | return XFS_ERROR(EROFS); | |
949 | if (XFS_FORCED_SHUTDOWN(mp)) | |
950 | return XFS_ERROR(EIO); | |
951 | ||
952 | /* | |
953 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
954 | * before we start any other transactions. Trying to do this later | |
955 | * is messy. We don't care to take a readlock to look at the ids | |
956 | * in inode here, because we can't hold it across the trans_reserve. | |
957 | * If the IDs do change before we take the ilock, we're covered | |
958 | * because the i_*dquot fields will get updated anyway. | |
959 | */ | |
960 | if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { | |
961 | code = XFS_QM_DQVOPALLOC(mp, ip, ip->i_d.di_uid, | |
962 | ip->i_d.di_gid, fa->fsx_projid, | |
963 | XFS_QMOPT_PQUOTA, &udqp, &gdqp); | |
964 | if (code) | |
965 | return code; | |
966 | } | |
967 | ||
968 | /* | |
969 | * For the other attributes, we acquire the inode lock and | |
970 | * first do an error checking pass. | |
971 | */ | |
972 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); | |
973 | code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0); | |
974 | if (code) | |
975 | goto error_return; | |
976 | ||
977 | lock_flags = XFS_ILOCK_EXCL; | |
978 | xfs_ilock(ip, lock_flags); | |
979 | ||
980 | /* | |
981 | * CAP_FOWNER overrides the following restrictions: | |
982 | * | |
983 | * The user ID of the calling process must be equal | |
984 | * to the file owner ID, except in cases where the | |
985 | * CAP_FSETID capability is applicable. | |
986 | */ | |
987 | if (current->fsuid != ip->i_d.di_uid && !capable(CAP_FOWNER)) { | |
988 | code = XFS_ERROR(EPERM); | |
989 | goto error_return; | |
990 | } | |
991 | ||
992 | /* | |
993 | * Do a quota reservation only if projid is actually going to change. | |
994 | */ | |
995 | if (mask & FSX_PROJID) { | |
996 | if (XFS_IS_PQUOTA_ON(mp) && | |
997 | ip->i_d.di_projid != fa->fsx_projid) { | |
998 | ASSERT(tp); | |
999 | code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp, | |
1000 | capable(CAP_FOWNER) ? | |
1001 | XFS_QMOPT_FORCE_RES : 0); | |
1002 | if (code) /* out of quota */ | |
1003 | goto error_return; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | if (mask & FSX_EXTSIZE) { | |
1008 | /* | |
1009 | * Can't change extent size if any extents are allocated. | |
1010 | */ | |
1011 | if (ip->i_d.di_nextents && | |
1012 | ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != | |
1013 | fa->fsx_extsize)) { | |
1014 | code = XFS_ERROR(EINVAL); /* EFBIG? */ | |
1015 | goto error_return; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Extent size must be a multiple of the appropriate block | |
1020 | * size, if set at all. | |
1021 | */ | |
1022 | if (fa->fsx_extsize != 0) { | |
1023 | xfs_extlen_t size; | |
1024 | ||
1025 | if (XFS_IS_REALTIME_INODE(ip) || | |
1026 | ((mask & FSX_XFLAGS) && | |
1027 | (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { | |
1028 | size = mp->m_sb.sb_rextsize << | |
1029 | mp->m_sb.sb_blocklog; | |
1030 | } else { | |
1031 | size = mp->m_sb.sb_blocksize; | |
1032 | } | |
1033 | ||
1034 | if (fa->fsx_extsize % size) { | |
1035 | code = XFS_ERROR(EINVAL); | |
1036 | goto error_return; | |
1037 | } | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | ||
1042 | if (mask & FSX_XFLAGS) { | |
1043 | /* | |
1044 | * Can't change realtime flag if any extents are allocated. | |
1045 | */ | |
1046 | if ((ip->i_d.di_nextents || ip->i_delayed_blks) && | |
1047 | (XFS_IS_REALTIME_INODE(ip)) != | |
1048 | (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { | |
1049 | code = XFS_ERROR(EINVAL); /* EFBIG? */ | |
1050 | goto error_return; | |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * If realtime flag is set then must have realtime data. | |
1055 | */ | |
1056 | if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { | |
1057 | if ((mp->m_sb.sb_rblocks == 0) || | |
1058 | (mp->m_sb.sb_rextsize == 0) || | |
1059 | (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { | |
1060 | code = XFS_ERROR(EINVAL); | |
1061 | goto error_return; | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Can't modify an immutable/append-only file unless | |
1067 | * we have appropriate permission. | |
1068 | */ | |
1069 | if ((ip->i_d.di_flags & | |
1070 | (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || | |
1071 | (fa->fsx_xflags & | |
1072 | (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && | |
1073 | !capable(CAP_LINUX_IMMUTABLE)) { | |
1074 | code = XFS_ERROR(EPERM); | |
1075 | goto error_return; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | xfs_trans_ijoin(tp, ip, lock_flags); | |
1080 | xfs_trans_ihold(tp, ip); | |
1081 | ||
1082 | /* | |
1083 | * Change file ownership. Must be the owner or privileged. | |
1084 | * If the system was configured with the "restricted_chown" | |
1085 | * option, the owner is not permitted to give away the file, | |
1086 | * and can change the group id only to a group of which he | |
1087 | * or she is a member. | |
1088 | */ | |
1089 | if (mask & FSX_PROJID) { | |
1090 | /* | |
1091 | * CAP_FSETID overrides the following restrictions: | |
1092 | * | |
1093 | * The set-user-ID and set-group-ID bits of a file will be | |
1094 | * cleared upon successful return from chown() | |
1095 | */ | |
1096 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && | |
1097 | !capable(CAP_FSETID)) | |
1098 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); | |
1099 | ||
1100 | /* | |
1101 | * Change the ownerships and register quota modifications | |
1102 | * in the transaction. | |
1103 | */ | |
1104 | if (ip->i_d.di_projid != fa->fsx_projid) { | |
1105 | if (XFS_IS_PQUOTA_ON(mp)) { | |
1106 | olddquot = XFS_QM_DQVOPCHOWN(mp, tp, ip, | |
1107 | &ip->i_gdquot, gdqp); | |
1108 | } | |
1109 | ip->i_d.di_projid = fa->fsx_projid; | |
1110 | ||
1111 | /* | |
1112 | * We may have to rev the inode as well as | |
1113 | * the superblock version number since projids didn't | |
1114 | * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. | |
1115 | */ | |
1116 | if (ip->i_d.di_version == XFS_DINODE_VERSION_1) | |
1117 | xfs_bump_ino_vers2(tp, ip); | |
1118 | } | |
1119 | ||
1120 | } | |
1121 | ||
1122 | if (mask & FSX_EXTSIZE) | |
1123 | ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; | |
1124 | if (mask & FSX_XFLAGS) | |
1125 | xfs_set_diflags(ip, fa->fsx_xflags); | |
1126 | ||
1127 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1128 | xfs_ichgtime(ip, XFS_ICHGTIME_CHG); | |
1129 | ||
1130 | XFS_STATS_INC(xs_ig_attrchg); | |
1131 | ||
1132 | /* | |
1133 | * If this is a synchronous mount, make sure that the | |
1134 | * transaction goes to disk before returning to the user. | |
1135 | * This is slightly sub-optimal in that truncates require | |
1136 | * two sync transactions instead of one for wsync filesystems. | |
1137 | * One for the truncate and one for the timestamps since we | |
1138 | * don't want to change the timestamps unless we're sure the | |
1139 | * truncate worked. Truncates are less than 1% of the laddis | |
1140 | * mix so this probably isn't worth the trouble to optimize. | |
1141 | */ | |
1142 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
1143 | xfs_trans_set_sync(tp); | |
1144 | code = xfs_trans_commit(tp, 0); | |
1145 | xfs_iunlock(ip, lock_flags); | |
1146 | ||
1147 | /* | |
1148 | * Release any dquot(s) the inode had kept before chown. | |
1149 | */ | |
1150 | XFS_QM_DQRELE(mp, olddquot); | |
1151 | XFS_QM_DQRELE(mp, udqp); | |
1152 | XFS_QM_DQRELE(mp, gdqp); | |
1153 | ||
1154 | if (code) | |
1155 | return code; | |
1156 | ||
1157 | if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) { | |
1158 | XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL, | |
1159 | NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0, | |
1160 | (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0); | |
1161 | } | |
1162 | ||
1163 | vn_revalidate(XFS_ITOV(ip)); /* update flags */ | |
1164 | return 0; | |
1165 | ||
1166 | error_return: | |
1167 | XFS_QM_DQRELE(mp, udqp); | |
1168 | XFS_QM_DQRELE(mp, gdqp); | |
1169 | xfs_trans_cancel(tp, 0); | |
1170 | if (lock_flags) | |
1171 | xfs_iunlock(ip, lock_flags); | |
1172 | return code; | |
1173 | } | |
1174 | ||
1da177e4 | 1175 | STATIC int |
df26cfe8 | 1176 | xfs_ioc_fssetxattr( |
1da177e4 LT |
1177 | xfs_inode_t *ip, |
1178 | struct file *filp, | |
1da177e4 LT |
1179 | void __user *arg) |
1180 | { | |
1181 | struct fsxattr fa; | |
25fe55e8 | 1182 | unsigned int mask; |
df26cfe8 LM |
1183 | |
1184 | if (copy_from_user(&fa, arg, sizeof(fa))) | |
1185 | return -EFAULT; | |
1da177e4 | 1186 | |
25fe55e8 | 1187 | mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID; |
df26cfe8 | 1188 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
25fe55e8 | 1189 | mask |= FSX_NONBLOCK; |
1da177e4 | 1190 | |
25fe55e8 | 1191 | return -xfs_ioctl_setattr(ip, &fa, mask); |
df26cfe8 | 1192 | } |
1da177e4 | 1193 | |
df26cfe8 LM |
1194 | STATIC int |
1195 | xfs_ioc_getxflags( | |
1196 | xfs_inode_t *ip, | |
1197 | void __user *arg) | |
1198 | { | |
1199 | unsigned int flags; | |
1da177e4 | 1200 | |
df26cfe8 LM |
1201 | flags = xfs_di2lxflags(ip->i_d.di_flags); |
1202 | if (copy_to_user(arg, &flags, sizeof(flags))) | |
1203 | return -EFAULT; | |
1204 | return 0; | |
1205 | } | |
1da177e4 | 1206 | |
df26cfe8 LM |
1207 | STATIC int |
1208 | xfs_ioc_setxflags( | |
1209 | xfs_inode_t *ip, | |
1210 | struct file *filp, | |
1211 | void __user *arg) | |
1212 | { | |
25fe55e8 | 1213 | struct fsxattr fa; |
df26cfe8 | 1214 | unsigned int flags; |
25fe55e8 | 1215 | unsigned int mask; |
1da177e4 | 1216 | |
df26cfe8 LM |
1217 | if (copy_from_user(&flags, arg, sizeof(flags))) |
1218 | return -EFAULT; | |
1da177e4 | 1219 | |
df26cfe8 LM |
1220 | if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ |
1221 | FS_NOATIME_FL | FS_NODUMP_FL | \ | |
1222 | FS_SYNC_FL)) | |
1223 | return -EOPNOTSUPP; | |
1da177e4 | 1224 | |
25fe55e8 | 1225 | mask = FSX_XFLAGS; |
df26cfe8 | 1226 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
25fe55e8 CH |
1227 | mask |= FSX_NONBLOCK; |
1228 | fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); | |
1da177e4 | 1229 | |
25fe55e8 | 1230 | return -xfs_ioctl_setattr(ip, &fa, mask); |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | STATIC int | |
1234 | xfs_ioc_getbmap( | |
993386c1 | 1235 | struct xfs_inode *ip, |
1da177e4 LT |
1236 | int ioflags, |
1237 | unsigned int cmd, | |
1238 | void __user *arg) | |
1239 | { | |
1240 | struct getbmap bm; | |
1241 | int iflags; | |
1242 | int error; | |
1243 | ||
1244 | if (copy_from_user(&bm, arg, sizeof(bm))) | |
1245 | return -XFS_ERROR(EFAULT); | |
1246 | ||
1247 | if (bm.bmv_count < 2) | |
1248 | return -XFS_ERROR(EINVAL); | |
1249 | ||
1250 | iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); | |
1251 | if (ioflags & IO_INVIS) | |
1252 | iflags |= BMV_IF_NO_DMAPI_READ; | |
1253 | ||
993386c1 | 1254 | error = xfs_getbmap(ip, &bm, (struct getbmap __user *)arg+1, iflags); |
1da177e4 LT |
1255 | if (error) |
1256 | return -error; | |
1257 | ||
1258 | if (copy_to_user(arg, &bm, sizeof(bm))) | |
1259 | return -XFS_ERROR(EFAULT); | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | STATIC int | |
1264 | xfs_ioc_getbmapx( | |
993386c1 | 1265 | struct xfs_inode *ip, |
1da177e4 LT |
1266 | void __user *arg) |
1267 | { | |
1268 | struct getbmapx bmx; | |
1269 | struct getbmap bm; | |
1270 | int iflags; | |
1271 | int error; | |
1272 | ||
1273 | if (copy_from_user(&bmx, arg, sizeof(bmx))) | |
1274 | return -XFS_ERROR(EFAULT); | |
1275 | ||
1276 | if (bmx.bmv_count < 2) | |
1277 | return -XFS_ERROR(EINVAL); | |
1278 | ||
1279 | /* | |
1280 | * Map input getbmapx structure to a getbmap | |
1281 | * structure for xfs_getbmap. | |
1282 | */ | |
1283 | GETBMAP_CONVERT(bmx, bm); | |
1284 | ||
1285 | iflags = bmx.bmv_iflags; | |
1286 | ||
1287 | if (iflags & (~BMV_IF_VALID)) | |
1288 | return -XFS_ERROR(EINVAL); | |
1289 | ||
1290 | iflags |= BMV_IF_EXTENDED; | |
1291 | ||
993386c1 | 1292 | error = xfs_getbmap(ip, &bm, (struct getbmapx __user *)arg+1, iflags); |
1da177e4 LT |
1293 | if (error) |
1294 | return -error; | |
1295 | ||
1296 | GETBMAP_CONVERT(bm, bmx); | |
1297 | ||
1298 | if (copy_to_user(arg, &bmx, sizeof(bmx))) | |
1299 | return -XFS_ERROR(EFAULT); | |
1300 | ||
1301 | return 0; | |
1302 | } | |
df26cfe8 LM |
1303 | |
1304 | int | |
1305 | xfs_ioctl( | |
1306 | xfs_inode_t *ip, | |
1307 | struct file *filp, | |
1308 | int ioflags, | |
1309 | unsigned int cmd, | |
1310 | void __user *arg) | |
1311 | { | |
1312 | struct inode *inode = filp->f_path.dentry->d_inode; | |
1313 | xfs_mount_t *mp = ip->i_mount; | |
1314 | int error; | |
1315 | ||
1316 | xfs_itrace_entry(XFS_I(inode)); | |
1317 | switch (cmd) { | |
1318 | ||
1319 | case XFS_IOC_ALLOCSP: | |
1320 | case XFS_IOC_FREESP: | |
1321 | case XFS_IOC_RESVSP: | |
1322 | case XFS_IOC_UNRESVSP: | |
1323 | case XFS_IOC_ALLOCSP64: | |
1324 | case XFS_IOC_FREESP64: | |
1325 | case XFS_IOC_RESVSP64: | |
1326 | case XFS_IOC_UNRESVSP64: | |
1327 | /* | |
1328 | * Only allow the sys admin to reserve space unless | |
1329 | * unwritten extents are enabled. | |
1330 | */ | |
1331 | if (!xfs_sb_version_hasextflgbit(&mp->m_sb) && | |
1332 | !capable(CAP_SYS_ADMIN)) | |
1333 | return -EPERM; | |
1334 | ||
1335 | return xfs_ioc_space(ip, inode, filp, ioflags, cmd, arg); | |
1336 | ||
1337 | case XFS_IOC_DIOINFO: { | |
1338 | struct dioattr da; | |
1339 | xfs_buftarg_t *target = | |
1340 | XFS_IS_REALTIME_INODE(ip) ? | |
1341 | mp->m_rtdev_targp : mp->m_ddev_targp; | |
1342 | ||
1343 | da.d_mem = da.d_miniosz = 1 << target->bt_sshift; | |
1344 | da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); | |
1345 | ||
1346 | if (copy_to_user(arg, &da, sizeof(da))) | |
1347 | return -XFS_ERROR(EFAULT); | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | case XFS_IOC_FSBULKSTAT_SINGLE: | |
1352 | case XFS_IOC_FSBULKSTAT: | |
1353 | case XFS_IOC_FSINUMBERS: | |
1354 | return xfs_ioc_bulkstat(mp, cmd, arg); | |
1355 | ||
1356 | case XFS_IOC_FSGEOMETRY_V1: | |
1357 | return xfs_ioc_fsgeometry_v1(mp, arg); | |
1358 | ||
1359 | case XFS_IOC_FSGEOMETRY: | |
1360 | return xfs_ioc_fsgeometry(mp, arg); | |
1361 | ||
1362 | case XFS_IOC_GETVERSION: | |
1363 | return put_user(inode->i_generation, (int __user *)arg); | |
1364 | ||
1365 | case XFS_IOC_FSGETXATTR: | |
1366 | return xfs_ioc_fsgetxattr(ip, 0, arg); | |
1367 | case XFS_IOC_FSGETXATTRA: | |
1368 | return xfs_ioc_fsgetxattr(ip, 1, arg); | |
65e67f51 LM |
1369 | case XFS_IOC_FSSETXATTR: |
1370 | return xfs_ioc_fssetxattr(ip, filp, arg); | |
df26cfe8 | 1371 | case XFS_IOC_GETXFLAGS: |
65e67f51 | 1372 | return xfs_ioc_getxflags(ip, arg); |
df26cfe8 | 1373 | case XFS_IOC_SETXFLAGS: |
65e67f51 | 1374 | return xfs_ioc_setxflags(ip, filp, arg); |
df26cfe8 LM |
1375 | |
1376 | case XFS_IOC_FSSETDM: { | |
1377 | struct fsdmidata dmi; | |
1378 | ||
1379 | if (copy_from_user(&dmi, arg, sizeof(dmi))) | |
1380 | return -XFS_ERROR(EFAULT); | |
1381 | ||
1382 | error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, | |
1383 | dmi.fsd_dmstate); | |
1384 | return -error; | |
1385 | } | |
1386 | ||
1387 | case XFS_IOC_GETBMAP: | |
1388 | case XFS_IOC_GETBMAPA: | |
1389 | return xfs_ioc_getbmap(ip, ioflags, cmd, arg); | |
1390 | ||
1391 | case XFS_IOC_GETBMAPX: | |
1392 | return xfs_ioc_getbmapx(ip, arg); | |
1393 | ||
1394 | case XFS_IOC_FD_TO_HANDLE: | |
1395 | case XFS_IOC_PATH_TO_HANDLE: | |
1396 | case XFS_IOC_PATH_TO_FSHANDLE: | |
1397 | return xfs_find_handle(cmd, arg); | |
1398 | ||
1399 | case XFS_IOC_OPEN_BY_HANDLE: | |
1400 | return xfs_open_by_handle(mp, arg, filp, inode); | |
1401 | ||
1402 | case XFS_IOC_FSSETDM_BY_HANDLE: | |
1403 | return xfs_fssetdm_by_handle(mp, arg, inode); | |
1404 | ||
1405 | case XFS_IOC_READLINK_BY_HANDLE: | |
1406 | return xfs_readlink_by_handle(mp, arg, inode); | |
1407 | ||
1408 | case XFS_IOC_ATTRLIST_BY_HANDLE: | |
1409 | return xfs_attrlist_by_handle(mp, arg, inode); | |
1410 | ||
1411 | case XFS_IOC_ATTRMULTI_BY_HANDLE: | |
42a74f20 | 1412 | return xfs_attrmulti_by_handle(mp, arg, filp, inode); |
df26cfe8 LM |
1413 | |
1414 | case XFS_IOC_SWAPEXT: { | |
1415 | error = xfs_swapext((struct xfs_swapext __user *)arg); | |
1416 | return -error; | |
1417 | } | |
1418 | ||
1419 | case XFS_IOC_FSCOUNTS: { | |
1420 | xfs_fsop_counts_t out; | |
1421 | ||
1422 | error = xfs_fs_counts(mp, &out); | |
1423 | if (error) | |
1424 | return -error; | |
1425 | ||
1426 | if (copy_to_user(arg, &out, sizeof(out))) | |
1427 | return -XFS_ERROR(EFAULT); | |
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | case XFS_IOC_SET_RESBLKS: { | |
1432 | xfs_fsop_resblks_t inout; | |
1433 | __uint64_t in; | |
1434 | ||
1435 | if (!capable(CAP_SYS_ADMIN)) | |
1436 | return -EPERM; | |
1437 | ||
1438 | if (copy_from_user(&inout, arg, sizeof(inout))) | |
1439 | return -XFS_ERROR(EFAULT); | |
1440 | ||
1441 | /* input parameter is passed in resblks field of structure */ | |
1442 | in = inout.resblks; | |
1443 | error = xfs_reserve_blocks(mp, &in, &inout); | |
1444 | if (error) | |
1445 | return -error; | |
1446 | ||
1447 | if (copy_to_user(arg, &inout, sizeof(inout))) | |
1448 | return -XFS_ERROR(EFAULT); | |
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | case XFS_IOC_GET_RESBLKS: { | |
1453 | xfs_fsop_resblks_t out; | |
1454 | ||
1455 | if (!capable(CAP_SYS_ADMIN)) | |
1456 | return -EPERM; | |
1457 | ||
1458 | error = xfs_reserve_blocks(mp, NULL, &out); | |
1459 | if (error) | |
1460 | return -error; | |
1461 | ||
1462 | if (copy_to_user(arg, &out, sizeof(out))) | |
1463 | return -XFS_ERROR(EFAULT); | |
1464 | ||
1465 | return 0; | |
1466 | } | |
1467 | ||
1468 | case XFS_IOC_FSGROWFSDATA: { | |
1469 | xfs_growfs_data_t in; | |
1470 | ||
1471 | if (!capable(CAP_SYS_ADMIN)) | |
1472 | return -EPERM; | |
1473 | ||
1474 | if (copy_from_user(&in, arg, sizeof(in))) | |
1475 | return -XFS_ERROR(EFAULT); | |
1476 | ||
1477 | error = xfs_growfs_data(mp, &in); | |
1478 | return -error; | |
1479 | } | |
1480 | ||
1481 | case XFS_IOC_FSGROWFSLOG: { | |
1482 | xfs_growfs_log_t in; | |
1483 | ||
1484 | if (!capable(CAP_SYS_ADMIN)) | |
1485 | return -EPERM; | |
1486 | ||
1487 | if (copy_from_user(&in, arg, sizeof(in))) | |
1488 | return -XFS_ERROR(EFAULT); | |
1489 | ||
1490 | error = xfs_growfs_log(mp, &in); | |
1491 | return -error; | |
1492 | } | |
1493 | ||
1494 | case XFS_IOC_FSGROWFSRT: { | |
1495 | xfs_growfs_rt_t in; | |
1496 | ||
1497 | if (!capable(CAP_SYS_ADMIN)) | |
1498 | return -EPERM; | |
1499 | ||
1500 | if (copy_from_user(&in, arg, sizeof(in))) | |
1501 | return -XFS_ERROR(EFAULT); | |
1502 | ||
1503 | error = xfs_growfs_rt(mp, &in); | |
1504 | return -error; | |
1505 | } | |
1506 | ||
1507 | case XFS_IOC_FREEZE: | |
1508 | if (!capable(CAP_SYS_ADMIN)) | |
1509 | return -EPERM; | |
1510 | ||
1511 | if (inode->i_sb->s_frozen == SB_UNFROZEN) | |
1512 | freeze_bdev(inode->i_sb->s_bdev); | |
1513 | return 0; | |
1514 | ||
1515 | case XFS_IOC_THAW: | |
1516 | if (!capable(CAP_SYS_ADMIN)) | |
1517 | return -EPERM; | |
1518 | if (inode->i_sb->s_frozen != SB_UNFROZEN) | |
1519 | thaw_bdev(inode->i_sb->s_bdev, inode->i_sb); | |
1520 | return 0; | |
1521 | ||
1522 | case XFS_IOC_GOINGDOWN: { | |
1523 | __uint32_t in; | |
1524 | ||
1525 | if (!capable(CAP_SYS_ADMIN)) | |
1526 | return -EPERM; | |
1527 | ||
1528 | if (get_user(in, (__uint32_t __user *)arg)) | |
1529 | return -XFS_ERROR(EFAULT); | |
1530 | ||
1531 | error = xfs_fs_goingdown(mp, in); | |
1532 | return -error; | |
1533 | } | |
1534 | ||
1535 | case XFS_IOC_ERROR_INJECTION: { | |
1536 | xfs_error_injection_t in; | |
1537 | ||
1538 | if (!capable(CAP_SYS_ADMIN)) | |
1539 | return -EPERM; | |
1540 | ||
1541 | if (copy_from_user(&in, arg, sizeof(in))) | |
1542 | return -XFS_ERROR(EFAULT); | |
1543 | ||
1544 | error = xfs_errortag_add(in.errtag, mp); | |
1545 | return -error; | |
1546 | } | |
1547 | ||
1548 | case XFS_IOC_ERROR_CLEARALL: | |
1549 | if (!capable(CAP_SYS_ADMIN)) | |
1550 | return -EPERM; | |
1551 | ||
1552 | error = xfs_errortag_clearall(mp, 1); | |
1553 | return -error; | |
1554 | ||
1555 | default: | |
1556 | return -ENOTTY; | |
1557 | } | |
1558 | } |