1 | /* $NetBSD: ext2fs_vnops.c,v 1.125 2016/08/15 18:38:10 jdolecek Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1982, 1986, 1989, 1993 |
5 | * The Regents of the University of California. All rights reserved. |
6 | * (c) UNIX System Laboratories, Inc. |
7 | * All or some portions of this file are derived from material licensed |
8 | * to the University of California by American Telephone and Telegraph |
9 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
10 | * the permission of UNIX System Laboratories, Inc. |
11 | * |
12 | * Redistribution and use in source and binary forms, with or without |
13 | * modification, are permitted provided that the following conditions |
14 | * are met: |
15 | * 1. Redistributions of source code must retain the above copyright |
16 | * notice, this list of conditions and the following disclaimer. |
17 | * 2. Redistributions in binary form must reproduce the above copyright |
18 | * notice, this list of conditions and the following disclaimer in the |
19 | * documentation and/or other materials provided with the distribution. |
20 | * 3. Neither the name of the University nor the names of its contributors |
21 | * may be used to endorse or promote products derived from this software |
22 | * without specific prior written permission. |
23 | * |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
34 | * SUCH DAMAGE. |
35 | * |
36 | * @(#)ufs_vnops.c 8.14 (Berkeley) 10/26/94 |
37 | * Modified for ext2fs by Manuel Bouyer. |
38 | */ |
39 | |
40 | /* |
41 | * Copyright (c) 1997 Manuel Bouyer. |
42 | * |
43 | * Redistribution and use in source and binary forms, with or without |
44 | * modification, are permitted provided that the following conditions |
45 | * are met: |
46 | * 1. Redistributions of source code must retain the above copyright |
47 | * notice, this list of conditions and the following disclaimer. |
48 | * 2. Redistributions in binary form must reproduce the above copyright |
49 | * notice, this list of conditions and the following disclaimer in the |
50 | * documentation and/or other materials provided with the distribution. |
51 | * |
52 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
53 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
54 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
55 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
56 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
57 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
58 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
59 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
60 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
61 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
62 | * |
63 | * @(#)ufs_vnops.c 8.14 (Berkeley) 10/26/94 |
64 | * Modified for ext2fs by Manuel Bouyer. |
65 | */ |
66 | |
67 | #include <sys/cdefs.h> |
68 | __KERNEL_RCSID(0, "$NetBSD: ext2fs_vnops.c,v 1.125 2016/08/15 18:38:10 jdolecek Exp $" ); |
69 | |
70 | #include <sys/param.h> |
71 | #include <sys/systm.h> |
72 | #include <sys/resourcevar.h> |
73 | #include <sys/kernel.h> |
74 | #include <sys/file.h> |
75 | #include <sys/stat.h> |
76 | #include <sys/buf.h> |
77 | #include <sys/proc.h> |
78 | #include <sys/mount.h> |
79 | #include <sys/namei.h> |
80 | #include <sys/vnode.h> |
81 | #include <sys/lockf.h> |
82 | #include <sys/pool.h> |
83 | #include <sys/signalvar.h> |
84 | #include <sys/kauth.h> |
85 | |
86 | #include <miscfs/fifofs/fifo.h> |
87 | #include <miscfs/genfs/genfs.h> |
88 | #include <miscfs/specfs/specdev.h> |
89 | |
90 | #include <ufs/ufs/inode.h> |
91 | #include <ufs/ufs/ufs_extern.h> |
92 | #include <ufs/ufs/ufsmount.h> |
93 | |
94 | #include <ufs/ext2fs/ext2fs.h> |
95 | #include <ufs/ext2fs/ext2fs_extern.h> |
96 | #include <ufs/ext2fs/ext2fs_dir.h> |
97 | #include <ufs/ext2fs/ext2fs_xattr.h> |
98 | |
99 | extern int prtactive; |
100 | |
101 | static int ext2fs_chmod(struct vnode *, int, kauth_cred_t, struct lwp *); |
102 | static int ext2fs_chown(struct vnode *, uid_t, gid_t, kauth_cred_t, |
103 | struct lwp *); |
104 | |
105 | union _qcvt { |
106 | int64_t qcvt; |
107 | int32_t val[2]; |
108 | }; |
109 | |
110 | #define SETHIGH(q, h) { \ |
111 | union _qcvt tmp; \ |
112 | tmp.qcvt = (q); \ |
113 | tmp.val[_QUAD_HIGHWORD] = (h); \ |
114 | (q) = tmp.qcvt; \ |
115 | } |
116 | #define SETLOW(q, l) { \ |
117 | union _qcvt tmp; \ |
118 | tmp.qcvt = (q); \ |
119 | tmp.val[_QUAD_LOWWORD] = (l); \ |
120 | (q) = tmp.qcvt; \ |
121 | } |
122 | |
123 | /* |
124 | * Create a regular file |
125 | */ |
126 | int |
127 | ext2fs_create(void *v) |
128 | { |
129 | struct vop_create_v3_args /* { |
130 | struct vnode *a_dvp; |
131 | struct vnode **a_vpp; |
132 | struct componentname *a_cnp; |
133 | struct vattr *a_vap; |
134 | } */ *ap = v; |
135 | int error; |
136 | |
137 | error = |
138 | ext2fs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), |
139 | ap->a_dvp, ap->a_vpp, ap->a_cnp, 1); |
140 | |
141 | if (error) |
142 | return error; |
143 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
144 | VOP_UNLOCK(*ap->a_vpp); |
145 | return 0; |
146 | } |
147 | |
148 | /* |
149 | * Mknod vnode call |
150 | */ |
151 | /* ARGSUSED */ |
152 | int |
153 | ext2fs_mknod(void *v) |
154 | { |
155 | struct vop_mknod_v3_args /* { |
156 | struct vnode *a_dvp; |
157 | struct vnode **a_vpp; |
158 | struct componentname *a_cnp; |
159 | struct vattr *a_vap; |
160 | } */ *ap = v; |
161 | struct vattr *vap = ap->a_vap; |
162 | struct vnode **vpp = ap->a_vpp; |
163 | struct inode *ip; |
164 | int error; |
165 | struct mount *mp; |
166 | ino_t ino; |
167 | |
168 | if ((error = ext2fs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), |
169 | ap->a_dvp, vpp, ap->a_cnp, 1)) != 0) |
170 | return error; |
171 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
172 | ip = VTOI(*vpp); |
173 | mp = (*vpp)->v_mount; |
174 | ino = ip->i_number; |
175 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
176 | if (vap->va_rdev != VNOVAL) { |
177 | /* |
178 | * Want to be able to use this to make badblock |
179 | * inodes, so don't truncate the dev number. |
180 | */ |
181 | ip->i_din.e2fs_din->e2di_rdev = h2fs32(vap->va_rdev); |
182 | } |
183 | /* |
184 | * Remove inode so that it will be reloaded by vcache_get and |
185 | * checked to see if it is an alias of an existing entry in |
186 | * the inode cache. |
187 | */ |
188 | (*vpp)->v_type = VNON; |
189 | VOP_UNLOCK(*vpp); |
190 | vgone(*vpp); |
191 | error = vcache_get(mp, &ino, sizeof(ino), vpp); |
192 | if (error != 0) { |
193 | *vpp = NULL; |
194 | return error; |
195 | } |
196 | return 0; |
197 | } |
198 | |
199 | /* |
200 | * Open called. |
201 | * |
202 | * Just check the APPEND flag. |
203 | */ |
204 | /* ARGSUSED */ |
205 | int |
206 | ext2fs_open(void *v) |
207 | { |
208 | struct vop_open_args /* { |
209 | struct vnode *a_vp; |
210 | int a_mode; |
211 | kauth_cred_t a_cred; |
212 | } */ *ap = v; |
213 | |
214 | /* |
215 | * Files marked append-only must be opened for appending. |
216 | */ |
217 | if ((VTOI(ap->a_vp)->i_e2fs_flags & EXT2_APPEND) && |
218 | (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) |
219 | return EPERM; |
220 | return 0; |
221 | } |
222 | |
223 | static int |
224 | ext2fs_check_possible(struct vnode *vp, struct inode *ip, mode_t mode) |
225 | { |
226 | |
227 | /* |
228 | * Disallow write attempts on read-only file systems; |
229 | * unless the file is a socket, fifo, or a block or |
230 | * character device resident on the file system. |
231 | */ |
232 | if (mode & VWRITE) { |
233 | switch (vp->v_type) { |
234 | case VDIR: |
235 | case VLNK: |
236 | case VREG: |
237 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
238 | return EROFS; |
239 | break; |
240 | default: |
241 | break; |
242 | } |
243 | } |
244 | |
245 | /* If immutable bit set, nobody gets to write it. */ |
246 | if ((mode & VWRITE) && (ip->i_e2fs_flags & EXT2_IMMUTABLE)) |
247 | return EPERM; |
248 | |
249 | return 0; |
250 | } |
251 | |
252 | static int |
253 | ext2fs_check_permitted(struct vnode *vp, struct inode *ip, mode_t mode, |
254 | kauth_cred_t cred) |
255 | { |
256 | |
257 | return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, vp->v_type, |
258 | ip->i_e2fs_mode & ALLPERMS), vp, NULL, genfs_can_access(vp->v_type, |
259 | ip->i_e2fs_mode & ALLPERMS, ip->i_uid, ip->i_gid, mode, cred)); |
260 | } |
261 | |
262 | int |
263 | ext2fs_access(void *v) |
264 | { |
265 | struct vop_access_args /* { |
266 | struct vnode *a_vp; |
267 | int a_mode; |
268 | kauth_cred_t a_cred; |
269 | } */ *ap = v; |
270 | struct vnode *vp = ap->a_vp; |
271 | struct inode *ip = VTOI(vp); |
272 | mode_t mode = ap->a_mode; |
273 | int error; |
274 | |
275 | error = ext2fs_check_possible(vp, ip, mode); |
276 | if (error) |
277 | return error; |
278 | |
279 | error = ext2fs_check_permitted(vp, ip, mode, ap->a_cred); |
280 | |
281 | return error; |
282 | } |
283 | |
284 | /* ARGSUSED */ |
285 | int |
286 | ext2fs_getattr(void *v) |
287 | { |
288 | struct vop_getattr_args /* { |
289 | struct vnode *a_vp; |
290 | struct vattr *a_vap; |
291 | kauth_cred_t a_cred; |
292 | } */ *ap = v; |
293 | struct vnode *vp = ap->a_vp; |
294 | struct inode *ip = VTOI(vp); |
295 | struct vattr *vap = ap->a_vap; |
296 | |
297 | EXT2FS_ITIMES(ip, NULL, NULL, NULL); |
298 | /* |
299 | * Copy from inode table |
300 | */ |
301 | vap->va_fsid = ip->i_dev; |
302 | vap->va_fileid = ip->i_number; |
303 | vap->va_mode = ip->i_e2fs_mode & ALLPERMS; |
304 | vap->va_nlink = ip->i_e2fs_nlink; |
305 | vap->va_uid = ip->i_uid; |
306 | vap->va_gid = ip->i_gid; |
307 | vap->va_rdev = (dev_t)fs2h32(ip->i_din.e2fs_din->e2di_rdev); |
308 | vap->va_size = vp->v_size; |
309 | EXT2_DINODE_TIME_GET(&vap->va_atime, ip->i_din.e2fs_din, e2di_atime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
310 | EXT2_DINODE_TIME_GET(&vap->va_mtime, ip->i_din.e2fs_din, e2di_mtime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
311 | EXT2_DINODE_TIME_GET(&vap->va_ctime, ip->i_din.e2fs_din, e2di_ctime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
312 | if (EXT2_DINODE_FITS(ip->i_din.e2fs_din, e2di_crtime, EXT2_DINODE_SIZE(ip->i_e2fs))) { |
313 | EXT2_DINODE_TIME_GET(&vap->va_birthtime, ip->i_din.e2fs_din, e2di_crtime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
314 | } |
315 | |
316 | vap->va_flags = 0; |
317 | vap->va_flags |= (ip->i_e2fs_flags & EXT2_NODUMP) ? UF_NODUMP : 0; |
318 | #ifdef EXT2FS_SYSTEM_FLAGS |
319 | vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0; |
320 | vap->va_flags |= (ip->i_e2fs_flags & EXT2_APPEND) ? SF_APPEND : 0; |
321 | #else |
322 | vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? UF_IMMUTABLE : 0; |
323 | vap->va_flags |= (ip->i_e2fs_flags & EXT2_APPEND) ? UF_APPEND : 0; |
324 | #endif |
325 | |
326 | vap->va_gen = ip->i_e2fs_gen; |
327 | /* this doesn't belong here */ |
328 | if (vp->v_type == VBLK) |
329 | vap->va_blocksize = BLKDEV_IOSIZE; |
330 | else if (vp->v_type == VCHR) |
331 | vap->va_blocksize = MAXBSIZE; |
332 | else |
333 | vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; |
334 | vap->va_bytes = dbtob(ext2fs_nblock(ip)); |
335 | vap->va_type = vp->v_type; |
336 | vap->va_filerev = ip->i_modrev; |
337 | return 0; |
338 | } |
339 | |
340 | /* |
341 | * Set attribute vnode op. called from several syscalls |
342 | */ |
343 | int |
344 | ext2fs_setattr(void *v) |
345 | { |
346 | struct vop_setattr_args /* { |
347 | struct vnode *a_vp; |
348 | struct vattr *a_vap; |
349 | kauth_cred_t a_cred; |
350 | } */ *ap = v; |
351 | struct vattr *vap = ap->a_vap; |
352 | struct vnode *vp = ap->a_vp; |
353 | struct inode *ip = VTOI(vp); |
354 | kauth_cred_t cred = ap->a_cred; |
355 | struct lwp *l = curlwp; |
356 | int error; |
357 | kauth_action_t action = KAUTH_VNODE_WRITE_FLAGS; |
358 | bool changing_sysflags = false; |
359 | |
360 | /* |
361 | * Check for unsettable attributes. |
362 | */ |
363 | if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || |
364 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || |
365 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || |
366 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
367 | return EINVAL; |
368 | } |
369 | if (vap->va_flags != VNOVAL) { |
370 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
371 | return EROFS; |
372 | |
373 | /* |
374 | * Check if we're allowed to change the flags. |
375 | * If EXT2FS_SYSTEM_FLAGS is set, then the flags are treated |
376 | * as system flags, otherwise they're considered to be user |
377 | * flags. |
378 | */ |
379 | #ifdef EXT2FS_SYSTEM_FLAGS |
380 | /* Indicate we're changing system flags if we are. */ |
381 | if ((vap->va_flags & SF_APPEND) || |
382 | (vap->va_flags & SF_IMMUTABLE)) { |
383 | action |= KAUTH_VNODE_WRITE_SYSFLAGS; |
384 | changing_sysflags = true; |
385 | } |
386 | |
387 | /* Indicate the node has system flags if it does. */ |
388 | if (ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE)) { |
389 | action |= KAUTH_VNODE_HAS_SYSFLAGS; |
390 | } |
391 | #endif /* EXT2FS_SYSTEM_FLAGS */ |
392 | |
393 | error = kauth_authorize_vnode(cred, action, vp, NULL, |
394 | genfs_can_chflags(cred, vp->v_type, ip->i_uid, |
395 | changing_sysflags)); |
396 | if (error) |
397 | return error; |
398 | |
399 | ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE | EXT2_NODUMP); |
400 | #ifdef EXT2FS_SYSTEM_FLAGS |
401 | ip->i_e2fs_flags |= |
402 | (vap->va_flags & SF_APPEND) ? EXT2_APPEND : 0 | |
403 | (vap->va_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0; |
404 | #else |
405 | ip->i_e2fs_flags |= |
406 | (vap->va_flags & UF_APPEND) ? EXT2_APPEND : 0 | |
407 | (vap->va_flags & UF_IMMUTABLE) ? EXT2_IMMUTABLE : 0; |
408 | #endif |
409 | ip->i_e2fs_flags |= |
410 | (vap->va_flags & UF_NODUMP) ? EXT2_NODUMP : 0; |
411 | ip->i_flag |= IN_CHANGE; |
412 | if (vap->va_flags & (IMMUTABLE | APPEND)) |
413 | return 0; |
414 | } |
415 | if (ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE)) |
416 | return EPERM; |
417 | /* |
418 | * Go through the fields and update iff not VNOVAL. |
419 | */ |
420 | if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { |
421 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
422 | return EROFS; |
423 | error = ext2fs_chown(vp, vap->va_uid, vap->va_gid, cred, l); |
424 | if (error) |
425 | return error; |
426 | } |
427 | if (vap->va_size != VNOVAL) { |
428 | /* |
429 | * Disallow write attempts on read-only file systems; |
430 | * unless the file is a socket, fifo, or a block or |
431 | * character device resident on the file system. |
432 | */ |
433 | switch (vp->v_type) { |
434 | case VDIR: |
435 | return EISDIR; |
436 | case VLNK: |
437 | case VREG: |
438 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
439 | return EROFS; |
440 | default: |
441 | break; |
442 | } |
443 | error = ext2fs_truncate(vp, vap->va_size, 0, cred); |
444 | if (error) |
445 | return error; |
446 | } |
447 | ip = VTOI(vp); |
448 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || vap->va_birthtime.tv_sec != VNOVAL) { |
449 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
450 | return EROFS; |
451 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, |
452 | NULL, genfs_can_chtimes(vp, vap->va_vaflags, ip->i_uid, |
453 | cred)); |
454 | if (error) |
455 | return error; |
456 | if (vap->va_atime.tv_sec != VNOVAL) |
457 | if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) |
458 | ip->i_flag |= IN_ACCESS; |
459 | if (vap->va_mtime.tv_sec != VNOVAL) { |
460 | ip->i_flag |= IN_CHANGE | IN_UPDATE; |
461 | if (vp->v_mount->mnt_flag & MNT_RELATIME) |
462 | ip->i_flag |= IN_ACCESS; |
463 | } |
464 | if (vap->va_birthtime.tv_sec != VNOVAL && |
465 | EXT2_DINODE_FITS(ip->i_din.e2fs_din, e2di_crtime, EXT2_DINODE_SIZE(ip->i_e2fs))) { |
466 | |
467 | EXT2_DINODE_TIME_SET(&vap->va_birthtime, ip->i_din.e2fs_din, e2di_crtime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
468 | } |
469 | error = ext2fs_update(vp, &vap->va_atime, &vap->va_mtime, |
470 | UPDATE_WAIT); |
471 | if (error) |
472 | return error; |
473 | } |
474 | error = 0; |
475 | if (vap->va_mode != (mode_t)VNOVAL) { |
476 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
477 | return EROFS; |
478 | error = ext2fs_chmod(vp, (int)vap->va_mode, cred, l); |
479 | } |
480 | VN_KNOTE(vp, NOTE_ATTRIB); |
481 | return error; |
482 | } |
483 | |
484 | /* |
485 | * Change the mode on a file. |
486 | * Inode must be locked before calling. |
487 | */ |
488 | static int |
489 | ext2fs_chmod(struct vnode *vp, int mode, kauth_cred_t cred, struct lwp *l) |
490 | { |
491 | struct inode *ip = VTOI(vp); |
492 | int error; |
493 | |
494 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, |
495 | NULL, genfs_can_chmod(vp->v_type, cred, ip->i_uid, ip->i_gid, |
496 | mode)); |
497 | if (error) |
498 | return error; |
499 | |
500 | ip->i_e2fs_mode &= ~ALLPERMS; |
501 | ip->i_e2fs_mode |= (mode & ALLPERMS); |
502 | ip->i_flag |= IN_CHANGE; |
503 | return 0; |
504 | } |
505 | |
506 | /* |
507 | * Perform chown operation on inode ip; |
508 | * inode must be locked prior to call. |
509 | */ |
510 | static int |
511 | ext2fs_chown(struct vnode *vp, uid_t uid, gid_t gid, kauth_cred_t cred, |
512 | struct lwp *l) |
513 | { |
514 | struct inode *ip = VTOI(vp); |
515 | uid_t ouid; |
516 | gid_t ogid; |
517 | int error; |
518 | |
519 | if (uid == (uid_t)VNOVAL) |
520 | uid = ip->i_uid; |
521 | if (gid == (gid_t)VNOVAL) |
522 | gid = ip->i_gid; |
523 | |
524 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, vp, |
525 | NULL, genfs_can_chown(cred, ip->i_uid, ip->i_gid, uid, gid)); |
526 | if (error) |
527 | return error; |
528 | |
529 | ogid = ip->i_gid; |
530 | ouid = ip->i_uid; |
531 | |
532 | ip->i_e2fs_gid = gid & 0xffff; |
533 | ip->i_e2fs_uid = uid & 0xffff; |
534 | if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0) { |
535 | ip->i_e2fs_gid_high = (gid >> 16) & 0xffff; |
536 | ip->i_e2fs_uid_high = (uid >> 16) & 0xffff; |
537 | } else { |
538 | ip->i_e2fs_gid_high = 0; |
539 | ip->i_e2fs_uid_high = 0; |
540 | } |
541 | if (ouid != uid || ogid != gid) { |
542 | ext2fs_set_inode_guid(ip); |
543 | ip->i_flag |= IN_CHANGE; |
544 | } |
545 | if (ouid != uid && (ip->i_e2fs_mode & ISUID) && |
546 | kauth_authorize_vnode(cred, KAUTH_VNODE_RETAIN_SUID, |
547 | vp, NULL, EPERM) != 0) |
548 | ip->i_e2fs_mode &= ~ISUID; |
549 | if (ogid != gid && (ip->i_e2fs_mode & ISGID) && |
550 | kauth_authorize_vnode(cred, KAUTH_VNODE_RETAIN_SGID, |
551 | vp, NULL, EPERM) != 0) |
552 | ip->i_e2fs_mode &= ~ISGID; |
553 | return 0; |
554 | } |
555 | |
556 | int |
557 | ext2fs_remove(void *v) |
558 | { |
559 | struct vop_remove_args /* { |
560 | struct vnode *a_dvp; |
561 | struct vnode *a_vp; |
562 | struct componentname *a_cnp; |
563 | } */ *ap = v; |
564 | struct inode *ip; |
565 | struct vnode *vp = ap->a_vp; |
566 | struct vnode *dvp = ap->a_dvp; |
567 | struct ufs_lookup_results *ulr; |
568 | int error; |
569 | |
570 | /* XXX should handle this material another way */ |
571 | ulr = &VTOI(dvp)->i_crap; |
572 | UFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
573 | |
574 | ip = VTOI(vp); |
575 | if (vp->v_type == VDIR || |
576 | (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || |
577 | (VTOI(dvp)->i_e2fs_flags & EXT2_APPEND)) { |
578 | error = EPERM; |
579 | } else { |
580 | error = ext2fs_dirremove(dvp, ulr, ap->a_cnp); |
581 | if (error == 0) { |
582 | ip->i_e2fs_nlink--; |
583 | ip->i_flag |= IN_CHANGE; |
584 | } |
585 | } |
586 | |
587 | VN_KNOTE(vp, NOTE_DELETE); |
588 | VN_KNOTE(dvp, NOTE_WRITE); |
589 | if (dvp == vp) |
590 | vrele(vp); |
591 | else |
592 | vput(vp); |
593 | vput(dvp); |
594 | return error; |
595 | } |
596 | |
597 | /* |
598 | * ext2fs_link: create hard link. |
599 | */ |
600 | int |
601 | ext2fs_link(void *v) |
602 | { |
603 | struct vop_link_v2_args /* { |
604 | struct vnode *a_dvp; |
605 | struct vnode *a_vp; |
606 | struct componentname *a_cnp; |
607 | } */ *ap = v; |
608 | struct vnode *dvp = ap->a_dvp; |
609 | struct vnode *vp = ap->a_vp; |
610 | struct componentname *cnp = ap->a_cnp; |
611 | struct inode *ip; |
612 | int error; |
613 | struct ufs_lookup_results *ulr; |
614 | |
615 | KASSERT(dvp != vp); |
616 | KASSERT(vp->v_type != VDIR); |
617 | KASSERT(dvp->v_mount == vp->v_mount); |
618 | |
619 | /* XXX should handle this material another way */ |
620 | ulr = &VTOI(dvp)->i_crap; |
621 | UFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
622 | |
623 | error = vn_lock(vp, LK_EXCLUSIVE); |
624 | if (error) { |
625 | VOP_ABORTOP(dvp, cnp); |
626 | goto out2; |
627 | } |
628 | ip = VTOI(vp); |
629 | if ((nlink_t)ip->i_e2fs_nlink >= EXT2FS_LINK_MAX) { |
630 | VOP_ABORTOP(dvp, cnp); |
631 | error = EMLINK; |
632 | goto out1; |
633 | } |
634 | if (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) { |
635 | VOP_ABORTOP(dvp, cnp); |
636 | error = EPERM; |
637 | goto out1; |
638 | } |
639 | ip->i_e2fs_nlink++; |
640 | ip->i_flag |= IN_CHANGE; |
641 | error = ext2fs_update(vp, NULL, NULL, UPDATE_WAIT); |
642 | if (!error) |
643 | error = ext2fs_direnter(ip, dvp, ulr, cnp); |
644 | if (error) { |
645 | ip->i_e2fs_nlink--; |
646 | ip->i_flag |= IN_CHANGE; |
647 | } |
648 | out1: |
649 | VOP_UNLOCK(vp); |
650 | out2: |
651 | VN_KNOTE(vp, NOTE_LINK); |
652 | VN_KNOTE(dvp, NOTE_WRITE); |
653 | return error; |
654 | } |
655 | |
656 | /* |
657 | * Mkdir system call |
658 | */ |
659 | int |
660 | ext2fs_mkdir(void *v) |
661 | { |
662 | struct vop_mkdir_v3_args /* { |
663 | struct vnode *a_dvp; |
664 | struct vnode **a_vpp; |
665 | struct componentname *a_cnp; |
666 | struct vattr *a_vap; |
667 | } */ *ap = v; |
668 | struct vnode *dvp = ap->a_dvp; |
669 | struct componentname *cnp = ap->a_cnp; |
670 | struct inode *ip, *dp = VTOI(dvp); |
671 | struct vnode *tvp; |
672 | struct ext2fs_dirtemplate dirtemplate; |
673 | int error; |
674 | struct ufs_lookup_results *ulr; |
675 | |
676 | /* XXX should handle this material another way */ |
677 | ulr = &VTOI(dvp)->i_crap; |
678 | UFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
679 | |
680 | /* |
681 | * Acquire the inode, but don't sync/direnter it just yet |
682 | */ |
683 | error = ext2fs_makeinode(IFDIR | ap->a_vap->va_mode, ap->a_dvp, |
684 | &tvp, ap->a_cnp, 0); |
685 | if (error) |
686 | goto out; |
687 | |
688 | /* the link count is going to be 2 when all is done */ |
689 | ip = VTOI(tvp); |
690 | ip->i_e2fs_nlink = 2; |
691 | |
692 | /* |
693 | * Bump link count in parent directory |
694 | * to reflect work done below. Should |
695 | * be done before reference is created |
696 | * so reparation is possible if we crash. |
697 | */ |
698 | if (dp->i_e2fs_nlink != EXT2FS_LINK_INF) |
699 | dp->i_e2fs_nlink++; |
700 | |
701 | /* |
702 | * If we hit the link limit, for directories just set the nlink |
703 | * to special value 1, which means the link count is bigger |
704 | * than EXT2FS_LINK_MAX. |
705 | */ |
706 | if ((nlink_t)dp->i_e2fs_nlink >= EXT2FS_LINK_MAX) { |
707 | dp->i_e2fs_nlink = EXT2FS_LINK_INF; |
708 | |
709 | /* set the feature flag DIR_NLINK if not set already */ |
710 | if (!EXT2F_HAS_ROCOMPAT_FEATURE(dp->i_e2fs, EXT2F_ROCOMPAT_DIR_NLINK)) { |
711 | dp->i_e2fs->e2fs.e2fs_features_rocompat |= EXT2F_ROCOMPAT_DIR_NLINK; |
712 | dp->i_e2fs->e2fs_fmod = 1; |
713 | } |
714 | } |
715 | |
716 | dp->i_flag |= IN_CHANGE; |
717 | if ((error = ext2fs_update(dvp, NULL, NULL, UPDATE_DIROP)) != 0) |
718 | goto bad; |
719 | |
720 | /* Initialize directory with "." and ".." from static template. */ |
721 | memset(&dirtemplate, 0, sizeof(dirtemplate)); |
722 | dirtemplate.dot_ino = h2fs32(ip->i_number); |
723 | dirtemplate.dot_reclen = h2fs16(12); |
724 | dirtemplate.dot_namlen = 1; |
725 | if (EXT2F_HAS_INCOMPAT_FEATURE(dp->i_e2fs, EXT2F_INCOMPAT_FTYPE)) { |
726 | dirtemplate.dot_type = EXT2_FT_DIR; |
727 | } |
728 | dirtemplate.dot_name[0] = '.'; |
729 | dirtemplate.dotdot_ino = h2fs32(dp->i_number); |
730 | dirtemplate.dotdot_reclen = h2fs16(VTOI(dvp)->i_e2fs->e2fs_bsize - 12); |
731 | dirtemplate.dotdot_namlen = 2; |
732 | if (EXT2F_HAS_INCOMPAT_FEATURE(dp->i_e2fs, EXT2F_INCOMPAT_FTYPE)) { |
733 | dirtemplate.dotdot_type = EXT2_FT_DIR; |
734 | } |
735 | dirtemplate.dotdot_name[0] = dirtemplate.dotdot_name[1] = '.'; |
736 | error = ufs_bufio(UIO_WRITE, tvp, (void *)&dirtemplate, |
737 | sizeof (dirtemplate), (off_t)0, IO_NODELOCKED|IO_SYNC, |
738 | cnp->cn_cred, (size_t *)0, NULL); |
739 | if (error) { |
740 | if (dp->i_e2fs_nlink != EXT2FS_LINK_INF) |
741 | dp->i_e2fs_nlink--; |
742 | dp->i_flag |= IN_CHANGE; |
743 | goto bad; |
744 | } |
745 | if (VTOI(dvp)->i_e2fs->e2fs_bsize > dvp->v_mount->mnt_stat.f_bsize) |
746 | panic("ext2fs_mkdir: blksize" ); /* XXX should grow with balloc() */ |
747 | else { |
748 | error = ext2fs_setsize(ip, VTOI(dvp)->i_e2fs->e2fs_bsize); |
749 | if (error) { |
750 | if (dp->i_e2fs_nlink != EXT2FS_LINK_INF) |
751 | dp->i_e2fs_nlink--; |
752 | dp->i_flag |= IN_CHANGE; |
753 | goto bad; |
754 | } |
755 | ip->i_flag |= IN_CHANGE; |
756 | uvm_vnp_setsize(tvp, ext2fs_size(ip)); |
757 | } |
758 | |
759 | /* Directory set up, now install its entry in the parent directory. */ |
760 | error = ext2fs_direnter(ip, dvp, ulr, cnp); |
761 | if (error != 0) { |
762 | if (dp->i_e2fs_nlink != EXT2FS_LINK_INF) |
763 | dp->i_e2fs_nlink--; |
764 | dp->i_flag |= IN_CHANGE; |
765 | } |
766 | bad: |
767 | /* |
768 | * No need to do an explicit ext2fs_truncate here, vrele will do this |
769 | * for us because we set the link count to 0. |
770 | */ |
771 | if (error) { |
772 | ip->i_e2fs_nlink = 0; |
773 | ip->i_flag |= IN_CHANGE; |
774 | vput(tvp); |
775 | } else { |
776 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
777 | VOP_UNLOCK(tvp); |
778 | *ap->a_vpp = tvp; |
779 | } |
780 | out: |
781 | return error; |
782 | } |
783 | |
784 | /* |
785 | * Rmdir system call. |
786 | */ |
787 | int |
788 | ext2fs_rmdir(void *v) |
789 | { |
790 | struct vop_rmdir_args /* { |
791 | struct vnode *a_dvp; |
792 | struct vnode *a_vp; |
793 | struct componentname *a_cnp; |
794 | } */ *ap = v; |
795 | struct vnode *vp = ap->a_vp; |
796 | struct vnode *dvp = ap->a_dvp; |
797 | struct componentname *cnp = ap->a_cnp; |
798 | struct inode *ip, *dp; |
799 | int error; |
800 | struct ufs_lookup_results *ulr; |
801 | |
802 | ip = VTOI(vp); |
803 | dp = VTOI(dvp); |
804 | |
805 | /* XXX should handle this material another way */ |
806 | ulr = &dp->i_crap; |
807 | UFS_CHECK_CRAPCOUNTER(dp); |
808 | |
809 | /* |
810 | * No rmdir "." please. |
811 | */ |
812 | if (dp == ip) { |
813 | vrele(dvp); |
814 | vput(vp); |
815 | return EINVAL; |
816 | } |
817 | /* |
818 | * Verify the directory is empty (and valid). |
819 | * (Rmdir ".." won't be valid since |
820 | * ".." will contain a reference to |
821 | * the current directory and thus be |
822 | * non-empty.) |
823 | */ |
824 | error = 0; |
825 | if ((ip->i_e2fs_nlink != 2 && ip->i_e2fs_nlink != EXT2FS_LINK_INF) || |
826 | !ext2fs_dirempty(ip, dp->i_number, cnp->cn_cred)) { |
827 | error = ENOTEMPTY; |
828 | goto out; |
829 | } |
830 | if ((dp->i_e2fs_flags & EXT2_APPEND) || |
831 | (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND))) { |
832 | error = EPERM; |
833 | goto out; |
834 | } |
835 | /* |
836 | * Delete reference to directory before purging |
837 | * inode. If we crash in between, the directory |
838 | * will be reattached to lost+found, |
839 | */ |
840 | error = ext2fs_dirremove(dvp, ulr, cnp); |
841 | if (error != 0) |
842 | goto out; |
843 | if (dp->i_e2fs_nlink != EXT2FS_LINK_INF) |
844 | dp->i_e2fs_nlink--; |
845 | dp->i_flag |= IN_CHANGE; |
846 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
847 | cache_purge(dvp); |
848 | vput(dvp); |
849 | dvp = NULL; |
850 | /* |
851 | * Truncate inode. The only stuff left |
852 | * in the directory is "." and "..". The |
853 | * "." reference is inconsequential since |
854 | * we're quashing it. The ".." reference |
855 | * has already been adjusted above. We've |
856 | * removed the "." reference and the reference |
857 | * in the parent directory, but there may be |
858 | * other hard links so decrement by 2 and |
859 | * worry about them later. |
860 | */ |
861 | ip->i_e2fs_nlink -= 2; |
862 | error = ext2fs_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred); |
863 | cache_purge(ITOV(ip)); |
864 | out: |
865 | VN_KNOTE(vp, NOTE_DELETE); |
866 | if (dvp) |
867 | vput(dvp); |
868 | vput(vp); |
869 | return error; |
870 | } |
871 | |
872 | /* |
873 | * symlink -- make a symbolic link |
874 | */ |
875 | int |
876 | ext2fs_symlink(void *v) |
877 | { |
878 | struct vop_symlink_v3_args /* { |
879 | struct vnode *a_dvp; |
880 | struct vnode **a_vpp; |
881 | struct componentname *a_cnp; |
882 | struct vattr *a_vap; |
883 | char *a_target; |
884 | } */ *ap = v; |
885 | struct vnode *vp, **vpp; |
886 | struct inode *ip; |
887 | int len, error; |
888 | |
889 | vpp = ap->a_vpp; |
890 | error = ext2fs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, |
891 | vpp, ap->a_cnp, 1); |
892 | if (error) |
893 | return error; |
894 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
895 | vp = *vpp; |
896 | len = strlen(ap->a_target); |
897 | ip = VTOI(vp); |
898 | if (len < ip->i_ump->um_maxsymlinklen) { |
899 | memcpy(ip->i_din.e2fs_din->e2di_shortlink, ap->a_target, len); |
900 | error = ext2fs_setsize(ip, len); |
901 | if (error) |
902 | goto bad; |
903 | ip->i_flag |= IN_CHANGE | IN_UPDATE; |
904 | if (vp->v_mount->mnt_flag & MNT_RELATIME) |
905 | ip->i_flag |= IN_ACCESS; |
906 | uvm_vnp_setsize(vp, len); |
907 | } else |
908 | error = ufs_bufio(UIO_WRITE, vp, ap->a_target, len, (off_t)0, |
909 | IO_NODELOCKED, ap->a_cnp->cn_cred, (size_t *)0, NULL); |
910 | bad: |
911 | VOP_UNLOCK(vp); |
912 | if (error) |
913 | vrele(vp); |
914 | return error; |
915 | } |
916 | |
917 | /* |
918 | * Return target name of a symbolic link |
919 | */ |
920 | int |
921 | ext2fs_readlink(void *v) |
922 | { |
923 | struct vop_readlink_args /* { |
924 | struct vnode *a_vp; |
925 | struct uio *a_uio; |
926 | kauth_cred_t a_cred; |
927 | } */ *ap = v; |
928 | struct vnode *vp = ap->a_vp; |
929 | struct inode *ip = VTOI(vp); |
930 | struct ufsmount *ump = ip->i_ump; |
931 | int isize; |
932 | |
933 | isize = ext2fs_size(ip); |
934 | if (isize < ump->um_maxsymlinklen || |
935 | (ump->um_maxsymlinklen == 0 && ext2fs_nblock(ip) == 0)) { |
936 | uiomove(ip->i_din.e2fs_din->e2di_shortlink, isize, ap->a_uio); |
937 | return 0; |
938 | } |
939 | return UFS_BUFRD(vp, ap->a_uio, 0, ap->a_cred); |
940 | } |
941 | |
942 | /* |
943 | * Advisory record locking support |
944 | */ |
945 | int |
946 | ext2fs_advlock(void *v) |
947 | { |
948 | struct vop_advlock_args /* { |
949 | struct vnode *a_vp; |
950 | void * a_id; |
951 | int a_op; |
952 | struct flock *a_fl; |
953 | int a_flags; |
954 | } */ *ap = v; |
955 | struct inode *ip = VTOI(ap->a_vp); |
956 | |
957 | return lf_advlock(ap, &ip->i_lockf, ext2fs_size(ip)); |
958 | } |
959 | |
960 | int |
961 | ext2fs_fsync(void *v) |
962 | { |
963 | struct vop_fsync_args /* { |
964 | struct vnode *a_vp; |
965 | kauth_cred_t a_cred; |
966 | int a_flags; |
967 | off_t offlo; |
968 | off_t offhi; |
969 | struct proc *a_p; |
970 | } */ *ap = v; |
971 | struct vnode *vp = ap->a_vp; |
972 | int wait; |
973 | int error; |
974 | |
975 | wait = (ap->a_flags & FSYNC_WAIT) != 0; |
976 | |
977 | if (vp->v_type == VBLK) |
978 | error = spec_fsync(v); |
979 | else |
980 | error = vflushbuf(vp, ap->a_flags); |
981 | if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0) |
982 | error = ext2fs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0); |
983 | |
984 | if (error == 0 && ap->a_flags & FSYNC_CACHE) { |
985 | int l = 0; |
986 | error = VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &l, FWRITE, |
987 | curlwp->l_cred); |
988 | } |
989 | |
990 | return error; |
991 | } |
992 | |
993 | /* |
994 | * Initialize the vnode associated with a new inode, handle aliased |
995 | * vnodes. |
996 | */ |
997 | int |
998 | ext2fs_vinit(struct mount *mntp, int (**specops)(void *), |
999 | int (**fifoops)(void *), struct vnode **vpp) |
1000 | { |
1001 | struct timeval tv; |
1002 | struct inode *ip; |
1003 | struct vnode *vp; |
1004 | |
1005 | vp = *vpp; |
1006 | ip = VTOI(vp); |
1007 | switch(vp->v_type = IFTOVT(ip->i_e2fs_mode)) { |
1008 | case VCHR: |
1009 | case VBLK: |
1010 | vp->v_op = specops; |
1011 | spec_node_init(vp, fs2h32(ip->i_din.e2fs_din->e2di_rdev)); |
1012 | break; |
1013 | case VFIFO: |
1014 | vp->v_op = fifoops; |
1015 | break; |
1016 | case VNON: |
1017 | case VBAD: |
1018 | case VSOCK: |
1019 | case VLNK: |
1020 | case VDIR: |
1021 | case VREG: |
1022 | break; |
1023 | } |
1024 | if (ip->i_number == UFS_ROOTINO) |
1025 | vp->v_vflag |= VV_ROOT; |
1026 | /* |
1027 | * Initialize modrev times |
1028 | */ |
1029 | getmicrouptime(&tv); |
1030 | SETHIGH(ip->i_modrev, tv.tv_sec); |
1031 | SETLOW(ip->i_modrev, tv.tv_usec * 4294); |
1032 | *vpp = vp; |
1033 | return 0; |
1034 | } |
1035 | |
1036 | /* |
1037 | * Allocate a new inode. |
1038 | */ |
1039 | int |
1040 | ext2fs_makeinode(int mode, struct vnode *dvp, struct vnode **vpp, |
1041 | struct componentname *cnp, int do_direnter) |
1042 | { |
1043 | struct inode *ip, *pdir; |
1044 | struct vnode *tvp; |
1045 | int error; |
1046 | struct ufs_lookup_results *ulr; |
1047 | |
1048 | pdir = VTOI(dvp); |
1049 | |
1050 | /* XXX should handle this material another way */ |
1051 | ulr = &pdir->i_crap; |
1052 | UFS_CHECK_CRAPCOUNTER(pdir); |
1053 | |
1054 | *vpp = NULL; |
1055 | if ((mode & IFMT) == 0) |
1056 | mode |= IFREG; |
1057 | |
1058 | if ((error = ext2fs_valloc(dvp, mode, cnp->cn_cred, &tvp)) != 0) { |
1059 | return error; |
1060 | } |
1061 | ip = VTOI(tvp); |
1062 | ip->i_uid = kauth_cred_geteuid(cnp->cn_cred); |
1063 | ip->i_e2fs_uid = ip->i_uid & 0xffff; |
1064 | ip->i_e2fs_gid = pdir->i_e2fs_gid; |
1065 | if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0) { |
1066 | ip->i_e2fs_uid_high = (ip->i_uid >> 16) & 0xffff; |
1067 | ip->i_e2fs_gid_high = pdir->i_e2fs_gid_high; |
1068 | } else { |
1069 | ip->i_e2fs_uid_high = 0; |
1070 | ip->i_e2fs_gid_high = 0; |
1071 | } |
1072 | ip->i_gid = ip->i_e2fs_gid | (ip->i_e2fs_gid_high << 16); |
1073 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
1074 | ip->i_e2fs_mode = mode; |
1075 | tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ |
1076 | ip->i_e2fs_nlink = 1; |
1077 | |
1078 | /* Authorize setting SGID if needed. */ |
1079 | if (ip->i_e2fs_mode & ISGID) { |
1080 | error = kauth_authorize_vnode(cnp->cn_cred, KAUTH_VNODE_WRITE_SECURITY, |
1081 | tvp, NULL, genfs_can_chmod(tvp->v_type, cnp->cn_cred, ip->i_uid, |
1082 | ip->i_gid, mode)); |
1083 | if (error) |
1084 | ip->i_e2fs_mode &= ~ISGID; |
1085 | } |
1086 | |
1087 | /* Initialize extra_isize according to what is set in superblock */ |
1088 | if (EXT2F_HAS_ROCOMPAT_FEATURE(ip->i_e2fs, EXT2F_ROCOMPAT_EXTRA_ISIZE) |
1089 | && EXT2_DINODE_SIZE(ip->i_e2fs) > EXT2_REV0_DINODE_SIZE) { |
1090 | ip->i_din.e2fs_din->e2di_extra_isize = ip->i_e2fs->e2fs.e4fs_want_extra_isize; |
1091 | } |
1092 | |
1093 | /* Set create time if possible */ |
1094 | if (EXT2_DINODE_FITS(ip->i_din.e2fs_din, e2di_crtime, EXT2_DINODE_SIZE(ip->i_e2fs))) { |
1095 | struct timespec now; |
1096 | vfs_timestamp(&now); |
1097 | EXT2_DINODE_TIME_SET(&now, ip->i_din.e2fs_din, e2di_crtime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
1098 | } |
1099 | |
1100 | if (do_direnter) { |
1101 | /* |
1102 | * Make sure inode goes to disk before directory entry. |
1103 | */ |
1104 | if ((error = ext2fs_update(tvp, NULL, NULL, UPDATE_WAIT)) != 0) |
1105 | goto bad; |
1106 | error = ext2fs_direnter(ip, dvp, ulr, cnp); |
1107 | if (error != 0) |
1108 | goto bad; |
1109 | } |
1110 | |
1111 | *vpp = tvp; |
1112 | return 0; |
1113 | |
1114 | bad: |
1115 | /* |
1116 | * Write error occurred trying to update the inode |
1117 | * or the directory so must deallocate the inode. |
1118 | */ |
1119 | tvp->v_type = VNON; /* Stop explosion if VBLK */ |
1120 | ip->i_e2fs_nlink = 0; |
1121 | ip->i_flag |= IN_CHANGE; |
1122 | vput(tvp); |
1123 | return error; |
1124 | } |
1125 | |
1126 | /* |
1127 | * Reclaim an inode so that it can be used for other purposes. |
1128 | */ |
1129 | int |
1130 | ext2fs_reclaim(void *v) |
1131 | { |
1132 | struct vop_reclaim_args /* { |
1133 | struct vnode *a_vp; |
1134 | } */ *ap = v; |
1135 | struct vnode *vp = ap->a_vp; |
1136 | struct inode *ip = VTOI(vp); |
1137 | int error; |
1138 | |
1139 | /* |
1140 | * The inode must be freed and updated before being removed |
1141 | * from its hash chain. Other threads trying to gain a hold |
1142 | * or lock on the inode will be stalled. |
1143 | */ |
1144 | if (ip->i_omode == 1 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) |
1145 | ext2fs_vfree(vp, ip->i_number, ip->i_e2fs_mode); |
1146 | if ((error = ufs_reclaim(vp)) != 0) |
1147 | return error; |
1148 | if (ip->i_din.e2fs_din != NULL) |
1149 | kmem_free(ip->i_din.e2fs_din, EXT2_DINODE_SIZE(ip->i_e2fs)); |
1150 | genfs_node_destroy(vp); |
1151 | pool_put(&ext2fs_inode_pool, vp->v_data); |
1152 | vp->v_data = NULL; |
1153 | return 0; |
1154 | } |
1155 | |
1156 | /* Global vfs data structures for ext2fs. */ |
1157 | int (**ext2fs_vnodeop_p)(void *); |
1158 | const struct vnodeopv_entry_desc ext2fs_vnodeop_entries[] = { |
1159 | { &vop_default_desc, vn_default_error }, |
1160 | { &vop_lookup_desc, ext2fs_lookup }, /* lookup */ |
1161 | { &vop_create_desc, ext2fs_create }, /* create */ |
1162 | { &vop_mknod_desc, ext2fs_mknod }, /* mknod */ |
1163 | { &vop_open_desc, ext2fs_open }, /* open */ |
1164 | { &vop_close_desc, ufs_close }, /* close */ |
1165 | { &vop_access_desc, ext2fs_access }, /* access */ |
1166 | { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ |
1167 | { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ |
1168 | { &vop_read_desc, ext2fs_read }, /* read */ |
1169 | { &vop_write_desc, ext2fs_write }, /* write */ |
1170 | { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ |
1171 | { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ |
1172 | { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ |
1173 | { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ |
1174 | { &vop_poll_desc, ufs_poll }, /* poll */ |
1175 | { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ |
1176 | { &vop_revoke_desc, ufs_revoke }, /* revoke */ |
1177 | { &vop_mmap_desc, ufs_mmap }, /* mmap */ |
1178 | { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ |
1179 | { &vop_seek_desc, ufs_seek }, /* seek */ |
1180 | { &vop_remove_desc, ext2fs_remove }, /* remove */ |
1181 | { &vop_link_desc, ext2fs_link }, /* link */ |
1182 | { &vop_rename_desc, ext2fs_rename }, /* rename */ |
1183 | { &vop_mkdir_desc, ext2fs_mkdir }, /* mkdir */ |
1184 | { &vop_rmdir_desc, ext2fs_rmdir }, /* rmdir */ |
1185 | { &vop_symlink_desc, ext2fs_symlink }, /* symlink */ |
1186 | { &vop_readdir_desc, ext2fs_readdir }, /* readdir */ |
1187 | { &vop_readlink_desc, ext2fs_readlink }, /* readlink */ |
1188 | { &vop_abortop_desc, ufs_abortop }, /* abortop */ |
1189 | { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ |
1190 | { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ |
1191 | { &vop_lock_desc, ufs_lock }, /* lock */ |
1192 | { &vop_unlock_desc, ufs_unlock }, /* unlock */ |
1193 | { &vop_bmap_desc, ext2fs_bmap }, /* bmap */ |
1194 | { &vop_strategy_desc, ufs_strategy }, /* strategy */ |
1195 | { &vop_print_desc, ufs_print }, /* print */ |
1196 | { &vop_islocked_desc, ufs_islocked }, /* islocked */ |
1197 | { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ |
1198 | { &vop_advlock_desc, ext2fs_advlock }, /* advlock */ |
1199 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
1200 | { &vop_getpages_desc, genfs_getpages }, /* getpages */ |
1201 | { &vop_putpages_desc, genfs_putpages }, /* putpages */ |
1202 | { &vop_getextattr_desc, ext2fs_getextattr }, /* getextattr */ |
1203 | { &vop_setextattr_desc, ext2fs_setextattr }, /* setextattr */ |
1204 | { &vop_listextattr_desc, ext2fs_listextattr }, /* listextattr */ |
1205 | { &vop_deleteextattr_desc, ext2fs_deleteextattr },/* deleteextattr */ |
1206 | { NULL, NULL } |
1207 | }; |
1208 | const struct vnodeopv_desc ext2fs_vnodeop_opv_desc = |
1209 | { &ext2fs_vnodeop_p, ext2fs_vnodeop_entries }; |
1210 | |
1211 | int (**ext2fs_specop_p)(void *); |
1212 | const struct vnodeopv_entry_desc ext2fs_specop_entries[] = { |
1213 | { &vop_default_desc, vn_default_error }, |
1214 | { &vop_lookup_desc, spec_lookup }, /* lookup */ |
1215 | { &vop_create_desc, spec_create }, /* create */ |
1216 | { &vop_mknod_desc, spec_mknod }, /* mknod */ |
1217 | { &vop_open_desc, spec_open }, /* open */ |
1218 | { &vop_close_desc, ufsspec_close }, /* close */ |
1219 | { &vop_access_desc, ext2fs_access }, /* access */ |
1220 | { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ |
1221 | { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ |
1222 | { &vop_read_desc, ufsspec_read }, /* read */ |
1223 | { &vop_write_desc, ufsspec_write }, /* write */ |
1224 | { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ |
1225 | { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ |
1226 | { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ |
1227 | { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ |
1228 | { &vop_poll_desc, spec_poll }, /* poll */ |
1229 | { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ |
1230 | { &vop_revoke_desc, spec_revoke }, /* revoke */ |
1231 | { &vop_mmap_desc, spec_mmap }, /* mmap */ |
1232 | { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ |
1233 | { &vop_seek_desc, spec_seek }, /* seek */ |
1234 | { &vop_remove_desc, spec_remove }, /* remove */ |
1235 | { &vop_link_desc, spec_link }, /* link */ |
1236 | { &vop_rename_desc, spec_rename }, /* rename */ |
1237 | { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ |
1238 | { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ |
1239 | { &vop_symlink_desc, spec_symlink }, /* symlink */ |
1240 | { &vop_readdir_desc, spec_readdir }, /* readdir */ |
1241 | { &vop_readlink_desc, spec_readlink }, /* readlink */ |
1242 | { &vop_abortop_desc, spec_abortop }, /* abortop */ |
1243 | { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ |
1244 | { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ |
1245 | { &vop_lock_desc, ufs_lock }, /* lock */ |
1246 | { &vop_unlock_desc, ufs_unlock }, /* unlock */ |
1247 | { &vop_bmap_desc, spec_bmap }, /* bmap */ |
1248 | { &vop_strategy_desc, spec_strategy }, /* strategy */ |
1249 | { &vop_print_desc, ufs_print }, /* print */ |
1250 | { &vop_islocked_desc, ufs_islocked }, /* islocked */ |
1251 | { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ |
1252 | { &vop_advlock_desc, spec_advlock }, /* advlock */ |
1253 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
1254 | { &vop_getpages_desc, spec_getpages }, /* getpages */ |
1255 | { &vop_putpages_desc, spec_putpages }, /* putpages */ |
1256 | { &vop_getextattr_desc, ext2fs_getextattr }, /* getextattr */ |
1257 | { &vop_setextattr_desc, ext2fs_setextattr }, /* setextattr */ |
1258 | { &vop_listextattr_desc, ext2fs_listextattr }, /* listextattr */ |
1259 | { &vop_deleteextattr_desc, ext2fs_deleteextattr },/* deleteextattr */ |
1260 | { NULL, NULL } |
1261 | }; |
1262 | const struct vnodeopv_desc ext2fs_specop_opv_desc = |
1263 | { &ext2fs_specop_p, ext2fs_specop_entries }; |
1264 | |
1265 | int (**ext2fs_fifoop_p)(void *); |
1266 | const struct vnodeopv_entry_desc ext2fs_fifoop_entries[] = { |
1267 | { &vop_default_desc, vn_default_error }, |
1268 | { &vop_lookup_desc, vn_fifo_bypass }, /* lookup */ |
1269 | { &vop_create_desc, vn_fifo_bypass }, /* create */ |
1270 | { &vop_mknod_desc, vn_fifo_bypass }, /* mknod */ |
1271 | { &vop_open_desc, vn_fifo_bypass }, /* open */ |
1272 | { &vop_close_desc, ufsfifo_close }, /* close */ |
1273 | { &vop_access_desc, ext2fs_access }, /* access */ |
1274 | { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ |
1275 | { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ |
1276 | { &vop_read_desc, ufsfifo_read }, /* read */ |
1277 | { &vop_write_desc, ufsfifo_write }, /* write */ |
1278 | { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ |
1279 | { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ |
1280 | { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ |
1281 | { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ |
1282 | { &vop_poll_desc, vn_fifo_bypass }, /* poll */ |
1283 | { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ |
1284 | { &vop_revoke_desc, vn_fifo_bypass }, /* revoke */ |
1285 | { &vop_mmap_desc, vn_fifo_bypass }, /* mmap */ |
1286 | { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ |
1287 | { &vop_seek_desc, vn_fifo_bypass }, /* seek */ |
1288 | { &vop_remove_desc, vn_fifo_bypass }, /* remove */ |
1289 | { &vop_link_desc, vn_fifo_bypass }, /* link */ |
1290 | { &vop_rename_desc, vn_fifo_bypass }, /* rename */ |
1291 | { &vop_mkdir_desc, vn_fifo_bypass }, /* mkdir */ |
1292 | { &vop_rmdir_desc, vn_fifo_bypass }, /* rmdir */ |
1293 | { &vop_symlink_desc, vn_fifo_bypass }, /* symlink */ |
1294 | { &vop_readdir_desc, vn_fifo_bypass }, /* readdir */ |
1295 | { &vop_readlink_desc, vn_fifo_bypass }, /* readlink */ |
1296 | { &vop_abortop_desc, vn_fifo_bypass }, /* abortop */ |
1297 | { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ |
1298 | { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ |
1299 | { &vop_lock_desc, ufs_lock }, /* lock */ |
1300 | { &vop_unlock_desc, ufs_unlock }, /* unlock */ |
1301 | { &vop_bmap_desc, vn_fifo_bypass }, /* bmap */ |
1302 | { &vop_strategy_desc, vn_fifo_bypass }, /* strategy */ |
1303 | { &vop_print_desc, ufs_print }, /* print */ |
1304 | { &vop_islocked_desc, ufs_islocked }, /* islocked */ |
1305 | { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ |
1306 | { &vop_advlock_desc, vn_fifo_bypass }, /* advlock */ |
1307 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
1308 | { &vop_putpages_desc, vn_fifo_bypass }, /* putpages */ |
1309 | { &vop_getextattr_desc, ext2fs_getextattr }, /* getextattr */ |
1310 | { &vop_setextattr_desc, ext2fs_setextattr }, /* setextattr */ |
1311 | { &vop_listextattr_desc, ext2fs_listextattr }, /* listextattr */ |
1312 | { &vop_deleteextattr_desc, ext2fs_deleteextattr },/* deleteextattr */ |
1313 | { NULL, NULL } |
1314 | }; |
1315 | const struct vnodeopv_desc ext2fs_fifoop_opv_desc = |
1316 | { &ext2fs_fifoop_p, ext2fs_fifoop_entries }; |
1317 | |