1/*
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 2000
5 * Poul-Henning Kamp. All rights reserved.
6 *
7 * This code is derived from software donated to Berkeley by
8 * Jan-Simon Pendry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95
32 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vnops.c 1.43
33 *
| 1/*
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 2000
5 * Poul-Henning Kamp. All rights reserved.
6 *
7 * This code is derived from software donated to Berkeley by
8 * Jan-Simon Pendry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95
32 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vnops.c 1.43
33 *
|
34 * $FreeBSD: head/sys/fs/devfs/devfs_vnops.c 130585 2004-06-16 09:47:26Z phk $
| 34 * $FreeBSD: head/sys/fs/devfs/devfs_vnops.c 130640 2004-06-17 17:16:53Z phk $
|
35 */
36
37/*
38 * TODO:
39 * remove empty directories
40 * mknod: hunt down DE_DELETED, compare name, reinstantiate.
41 * mkdir: want it ?
42 */
43
44#include <opt_devfs.h>
45#include <opt_mac.h>
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/conf.h>
50#include <sys/dirent.h>
51#include <sys/kernel.h>
52#include <sys/lock.h>
53#include <sys/mac.h>
54#include <sys/malloc.h>
55#include <sys/mount.h>
56#include <sys/namei.h>
57#include <sys/proc.h>
58#include <sys/time.h>
59#include <sys/unistd.h>
60#include <sys/vnode.h>
61
62#include <fs/devfs/devfs.h>
63
64static int devfs_access(struct vop_access_args *ap);
65static int devfs_getattr(struct vop_getattr_args *ap);
66static int devfs_ioctl(struct vop_ioctl_args *ap);
67static int devfs_lookupx(struct vop_lookup_args *ap);
68static int devfs_mknod(struct vop_mknod_args *ap);
69static int devfs_pathconf(struct vop_pathconf_args *ap);
70static int devfs_read(struct vop_read_args *ap);
71static int devfs_readdir(struct vop_readdir_args *ap);
72static int devfs_readlink(struct vop_readlink_args *ap);
73static int devfs_reclaim(struct vop_reclaim_args *ap);
74static int devfs_remove(struct vop_remove_args *ap);
75static int devfs_revoke(struct vop_revoke_args *ap);
76static int devfs_setattr(struct vop_setattr_args *ap);
77#ifdef MAC
78static int devfs_setlabel(struct vop_setlabel_args *ap);
79#endif
80static int devfs_symlink(struct vop_symlink_args *ap);
81
82static vop_t **devfs_vnodeop_p;
83static vop_t **devfs_specop_p;
84
85/*
86 * Construct the fully qualified path name relative to the mountpoint
87 */
88static char *
89devfs_fqpn(char *buf, struct vnode *dvp, struct componentname *cnp)
90{
91 int i;
92 struct devfs_dirent *de, *dd;
93 struct devfs_mount *dmp;
94
95 dmp = VFSTODEVFS(dvp->v_mount);
96 dd = dvp->v_data;
97 i = SPECNAMELEN;
98 buf[i] = '\0';
99 i -= cnp->cn_namelen;
100 if (i < 0)
101 return (NULL);
102 bcopy(cnp->cn_nameptr, buf + i, cnp->cn_namelen);
103 de = dd;
104 while (de != dmp->dm_basedir) {
105 i--;
106 if (i < 0)
107 return (NULL);
108 buf[i] = '/';
109 i -= de->de_dirent->d_namlen;
110 if (i < 0)
111 return (NULL);
112 bcopy(de->de_dirent->d_name, buf + i,
113 de->de_dirent->d_namlen);
114 de = TAILQ_FIRST(&de->de_dlist); /* "." */
115 de = TAILQ_NEXT(de, de_list); /* ".." */
116 de = de->de_dir;
117 }
118 return (buf + i);
119}
120
121int
122devfs_allocv(struct devfs_dirent *de, struct mount *mp, struct vnode **vpp, struct thread *td)
123{
124 int error;
125 struct vnode *vp;
126 struct cdev *dev;
127
128 if (td == NULL)
129 td = curthread; /* XXX */
130loop:
131 vp = de->de_vnode;
132 if (vp != NULL) {
133 if (vget(vp, LK_EXCLUSIVE, td ? td : curthread))
134 goto loop;
135 *vpp = vp;
136 return (0);
137 }
138 if (de->de_dirent->d_type == DT_CHR) {
139 dev = *devfs_itod(de->de_inode);
140 if (dev == NULL)
141 return (ENOENT);
142 } else {
| 35 */
36
37/*
38 * TODO:
39 * remove empty directories
40 * mknod: hunt down DE_DELETED, compare name, reinstantiate.
41 * mkdir: want it ?
42 */
43
44#include <opt_devfs.h>
45#include <opt_mac.h>
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/conf.h>
50#include <sys/dirent.h>
51#include <sys/kernel.h>
52#include <sys/lock.h>
53#include <sys/mac.h>
54#include <sys/malloc.h>
55#include <sys/mount.h>
56#include <sys/namei.h>
57#include <sys/proc.h>
58#include <sys/time.h>
59#include <sys/unistd.h>
60#include <sys/vnode.h>
61
62#include <fs/devfs/devfs.h>
63
64static int devfs_access(struct vop_access_args *ap);
65static int devfs_getattr(struct vop_getattr_args *ap);
66static int devfs_ioctl(struct vop_ioctl_args *ap);
67static int devfs_lookupx(struct vop_lookup_args *ap);
68static int devfs_mknod(struct vop_mknod_args *ap);
69static int devfs_pathconf(struct vop_pathconf_args *ap);
70static int devfs_read(struct vop_read_args *ap);
71static int devfs_readdir(struct vop_readdir_args *ap);
72static int devfs_readlink(struct vop_readlink_args *ap);
73static int devfs_reclaim(struct vop_reclaim_args *ap);
74static int devfs_remove(struct vop_remove_args *ap);
75static int devfs_revoke(struct vop_revoke_args *ap);
76static int devfs_setattr(struct vop_setattr_args *ap);
77#ifdef MAC
78static int devfs_setlabel(struct vop_setlabel_args *ap);
79#endif
80static int devfs_symlink(struct vop_symlink_args *ap);
81
82static vop_t **devfs_vnodeop_p;
83static vop_t **devfs_specop_p;
84
85/*
86 * Construct the fully qualified path name relative to the mountpoint
87 */
88static char *
89devfs_fqpn(char *buf, struct vnode *dvp, struct componentname *cnp)
90{
91 int i;
92 struct devfs_dirent *de, *dd;
93 struct devfs_mount *dmp;
94
95 dmp = VFSTODEVFS(dvp->v_mount);
96 dd = dvp->v_data;
97 i = SPECNAMELEN;
98 buf[i] = '\0';
99 i -= cnp->cn_namelen;
100 if (i < 0)
101 return (NULL);
102 bcopy(cnp->cn_nameptr, buf + i, cnp->cn_namelen);
103 de = dd;
104 while (de != dmp->dm_basedir) {
105 i--;
106 if (i < 0)
107 return (NULL);
108 buf[i] = '/';
109 i -= de->de_dirent->d_namlen;
110 if (i < 0)
111 return (NULL);
112 bcopy(de->de_dirent->d_name, buf + i,
113 de->de_dirent->d_namlen);
114 de = TAILQ_FIRST(&de->de_dlist); /* "." */
115 de = TAILQ_NEXT(de, de_list); /* ".." */
116 de = de->de_dir;
117 }
118 return (buf + i);
119}
120
121int
122devfs_allocv(struct devfs_dirent *de, struct mount *mp, struct vnode **vpp, struct thread *td)
123{
124 int error;
125 struct vnode *vp;
126 struct cdev *dev;
127
128 if (td == NULL)
129 td = curthread; /* XXX */
130loop:
131 vp = de->de_vnode;
132 if (vp != NULL) {
133 if (vget(vp, LK_EXCLUSIVE, td ? td : curthread))
134 goto loop;
135 *vpp = vp;
136 return (0);
137 }
138 if (de->de_dirent->d_type == DT_CHR) {
139 dev = *devfs_itod(de->de_inode);
140 if (dev == NULL)
141 return (ENOENT);
142 } else {
|
143 dev = NODEV;
| 143 dev = NULL;
|
144 }
145 error = getnewvnode("devfs", mp, devfs_vnodeop_p, &vp);
146 if (error != 0) {
147 printf("devfs_allocv: failed to allocate new vnode\n");
148 return (error);
149 }
150
151 if (de->de_dirent->d_type == DT_CHR) {
152 vp->v_type = VCHR;
153 vp = addaliasu(vp, dev->si_udev);
154 vp->v_op = devfs_specop_p;
155 } else if (de->de_dirent->d_type == DT_DIR) {
156 vp->v_type = VDIR;
157 } else if (de->de_dirent->d_type == DT_LNK) {
158 vp->v_type = VLNK;
159 } else {
160 vp->v_type = VBAD;
161 }
162 vp->v_data = de;
163 de->de_vnode = vp;
164 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
165#ifdef MAC
166 mac_associate_vnode_devfs(mp, de, vp);
167#endif
168 *vpp = vp;
169 return (0);
170}
171
172static int
173devfs_access(ap)
174 struct vop_access_args /* {
175 struct vnode *a_vp;
176 int a_mode;
177 struct ucred *a_cred;
178 struct thread *a_td;
179 } */ *ap;
180{
181 struct vnode *vp = ap->a_vp;
182 struct devfs_dirent *de;
183 int error;
184
185 de = vp->v_data;
186 if (vp->v_type == VDIR)
187 de = de->de_dir;
188
189 error = vaccess(vp->v_type, de->de_mode, de->de_uid, de->de_gid,
190 ap->a_mode, ap->a_cred, NULL);
191 if (!error)
192 return (error);
193 if (error != EACCES)
194 return (error);
195 /* We do, however, allow access to the controlling terminal */
196 if (!(ap->a_td->td_proc->p_flag & P_CONTROLT))
197 return (error);
198 if (ap->a_td->td_proc->p_session->s_ttyvp == de->de_vnode)
199 return (0);
200 return (error);
201}
202
203static int
204devfs_getattr(ap)
205 struct vop_getattr_args /* {
206 struct vnode *a_vp;
207 struct vattr *a_vap;
208 struct ucred *a_cred;
209 struct thread *a_td;
210 } */ *ap;
211{
212 struct vnode *vp = ap->a_vp;
213 struct vattr *vap = ap->a_vap;
214 int error = 0;
215 struct devfs_dirent *de;
216 struct cdev *dev;
217
218 de = vp->v_data;
219 if (vp->v_type == VDIR)
220 de = de->de_dir;
221 bzero((caddr_t) vap, sizeof(*vap));
222 vattr_null(vap);
223 vap->va_uid = de->de_uid;
224 vap->va_gid = de->de_gid;
225 vap->va_mode = de->de_mode;
226 if (vp->v_type == VLNK)
227 vap->va_size = strlen(de->de_symlink);
228 else if (vp->v_type == VDIR)
229 vap->va_size = vap->va_bytes = DEV_BSIZE;
230 else
231 vap->va_size = 0;
232 if (vp->v_type != VDIR)
233 vap->va_bytes = 0;
234 vap->va_blocksize = DEV_BSIZE;
235 vap->va_type = vp->v_type;
236
237#define fix(aa) \
238 do { \
239 if ((aa).tv_sec == 0) { \
240 (aa).tv_sec = boottime.tv_sec; \
241 (aa).tv_nsec = boottime.tv_usec * 1000; \
242 } \
243 } while (0)
244
245 if (vp->v_type != VCHR) {
246 fix(de->de_atime);
247 vap->va_atime = de->de_atime;
248 fix(de->de_mtime);
249 vap->va_mtime = de->de_mtime;
250 fix(de->de_ctime);
251 vap->va_ctime = de->de_ctime;
252 } else {
253 dev = vp->v_rdev;
254 fix(dev->si_atime);
255 vap->va_atime = dev->si_atime;
256 fix(dev->si_mtime);
257 vap->va_mtime = dev->si_mtime;
258 fix(dev->si_ctime);
259 vap->va_ctime = dev->si_ctime;
260 vap->va_rdev = dev->si_udev;
261 }
262 vap->va_gen = 0;
263 vap->va_flags = 0;
264 vap->va_nlink = de->de_links;
265 vap->va_fileid = de->de_inode;
266
267 return (error);
268}
269
270static int
271devfs_ioctl(ap)
272 struct vop_ioctl_args /* {
273 struct vnode *a_vp;
274 u_long a_command;
275 caddr_t a_data;
276 int a_fflag;
277 struct ucred *a_cred;
278 struct thread *a_td;
279 } */ *ap;
280{
281 int error;
282 struct devfs_mount *dmp;
283
284 dmp = VFSTODEVFS(ap->a_vp->v_mount);
285 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread);
286 devfs_populate(dmp);
287 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
288 error = devfs_rules_ioctl(ap->a_vp->v_mount, ap->a_command, ap->a_data,
289 ap->a_td);
290 return (error);
291}
292
293static int
294devfs_lookupx(ap)
295 struct vop_lookup_args /* {
296 struct vnode * a_dvp;
297 struct vnode ** a_vpp;
298 struct componentname * a_cnp;
299 } */ *ap;
300{
301 struct componentname *cnp;
302 struct vnode *dvp, **vpp;
303 struct thread *td;
304 struct devfs_dirent *de, *dd;
305 struct devfs_dirent **dde;
306 struct devfs_mount *dmp;
307 struct cdev *cdev;
308 int error, flags, nameiop;
309 char specname[SPECNAMELEN + 1], *pname;
310
311 cnp = ap->a_cnp;
312 vpp = ap->a_vpp;
313 dvp = ap->a_dvp;
314 pname = cnp->cn_nameptr;
315 td = cnp->cn_thread;
316 flags = cnp->cn_flags;
317 nameiop = cnp->cn_nameiop;
318 dmp = VFSTODEVFS(dvp->v_mount);
319 dd = dvp->v_data;
320
321 *vpp = NULLVP;
322 cnp->cn_flags &= ~PDIRUNLOCK;
323
324 if ((flags & ISLASTCN) && nameiop == RENAME)
325 return (EOPNOTSUPP);
326
327 if (dvp->v_type != VDIR)
328 return (ENOTDIR);
329
330 if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT))
331 return (EIO);
332
333 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td);
334 if (error)
335 return (error);
336
337 if (cnp->cn_namelen == 1 && *pname == '.') {
338 if ((flags & ISLASTCN) && nameiop != LOOKUP)
339 return (EINVAL);
340 *vpp = dvp;
341 VREF(dvp);
342 return (0);
343 }
344
345 if (flags & ISDOTDOT) {
346 if ((flags & ISLASTCN) && nameiop != LOOKUP)
347 return (EINVAL);
348 VOP_UNLOCK(dvp, 0, td);
349 cnp->cn_flags |= PDIRUNLOCK;
350 de = TAILQ_FIRST(&dd->de_dlist); /* "." */
351 de = TAILQ_NEXT(de, de_list); /* ".." */
352 de = de->de_dir;
353 error = devfs_allocv(de, dvp->v_mount, vpp, td);
354 if (error || ((flags & LOCKPARENT) && (flags & ISLASTCN))) {
355 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
356 cnp->cn_flags &= ~PDIRUNLOCK;
357 }
358 return (error);
359 }
360
361 devfs_populate(dmp);
362 dd = dvp->v_data;
363 TAILQ_FOREACH(de, &dd->de_dlist, de_list) {
364 if (cnp->cn_namelen != de->de_dirent->d_namlen)
365 continue;
366 if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name,
367 de->de_dirent->d_namlen) != 0)
368 continue;
369 if (de->de_flags & DE_WHITEOUT)
370 goto notfound;
371 goto found;
372 }
373
374 if (nameiop == DELETE)
375 goto notfound;
376
377 /*
378 * OK, we didn't have an entry for the name we were asked for
379 * so we try to see if anybody can create it on demand.
380 */
381 pname = devfs_fqpn(specname, dvp, cnp);
382 if (pname == NULL)
383 goto notfound;
384
| 144 }
145 error = getnewvnode("devfs", mp, devfs_vnodeop_p, &vp);
146 if (error != 0) {
147 printf("devfs_allocv: failed to allocate new vnode\n");
148 return (error);
149 }
150
151 if (de->de_dirent->d_type == DT_CHR) {
152 vp->v_type = VCHR;
153 vp = addaliasu(vp, dev->si_udev);
154 vp->v_op = devfs_specop_p;
155 } else if (de->de_dirent->d_type == DT_DIR) {
156 vp->v_type = VDIR;
157 } else if (de->de_dirent->d_type == DT_LNK) {
158 vp->v_type = VLNK;
159 } else {
160 vp->v_type = VBAD;
161 }
162 vp->v_data = de;
163 de->de_vnode = vp;
164 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
165#ifdef MAC
166 mac_associate_vnode_devfs(mp, de, vp);
167#endif
168 *vpp = vp;
169 return (0);
170}
171
172static int
173devfs_access(ap)
174 struct vop_access_args /* {
175 struct vnode *a_vp;
176 int a_mode;
177 struct ucred *a_cred;
178 struct thread *a_td;
179 } */ *ap;
180{
181 struct vnode *vp = ap->a_vp;
182 struct devfs_dirent *de;
183 int error;
184
185 de = vp->v_data;
186 if (vp->v_type == VDIR)
187 de = de->de_dir;
188
189 error = vaccess(vp->v_type, de->de_mode, de->de_uid, de->de_gid,
190 ap->a_mode, ap->a_cred, NULL);
191 if (!error)
192 return (error);
193 if (error != EACCES)
194 return (error);
195 /* We do, however, allow access to the controlling terminal */
196 if (!(ap->a_td->td_proc->p_flag & P_CONTROLT))
197 return (error);
198 if (ap->a_td->td_proc->p_session->s_ttyvp == de->de_vnode)
199 return (0);
200 return (error);
201}
202
203static int
204devfs_getattr(ap)
205 struct vop_getattr_args /* {
206 struct vnode *a_vp;
207 struct vattr *a_vap;
208 struct ucred *a_cred;
209 struct thread *a_td;
210 } */ *ap;
211{
212 struct vnode *vp = ap->a_vp;
213 struct vattr *vap = ap->a_vap;
214 int error = 0;
215 struct devfs_dirent *de;
216 struct cdev *dev;
217
218 de = vp->v_data;
219 if (vp->v_type == VDIR)
220 de = de->de_dir;
221 bzero((caddr_t) vap, sizeof(*vap));
222 vattr_null(vap);
223 vap->va_uid = de->de_uid;
224 vap->va_gid = de->de_gid;
225 vap->va_mode = de->de_mode;
226 if (vp->v_type == VLNK)
227 vap->va_size = strlen(de->de_symlink);
228 else if (vp->v_type == VDIR)
229 vap->va_size = vap->va_bytes = DEV_BSIZE;
230 else
231 vap->va_size = 0;
232 if (vp->v_type != VDIR)
233 vap->va_bytes = 0;
234 vap->va_blocksize = DEV_BSIZE;
235 vap->va_type = vp->v_type;
236
237#define fix(aa) \
238 do { \
239 if ((aa).tv_sec == 0) { \
240 (aa).tv_sec = boottime.tv_sec; \
241 (aa).tv_nsec = boottime.tv_usec * 1000; \
242 } \
243 } while (0)
244
245 if (vp->v_type != VCHR) {
246 fix(de->de_atime);
247 vap->va_atime = de->de_atime;
248 fix(de->de_mtime);
249 vap->va_mtime = de->de_mtime;
250 fix(de->de_ctime);
251 vap->va_ctime = de->de_ctime;
252 } else {
253 dev = vp->v_rdev;
254 fix(dev->si_atime);
255 vap->va_atime = dev->si_atime;
256 fix(dev->si_mtime);
257 vap->va_mtime = dev->si_mtime;
258 fix(dev->si_ctime);
259 vap->va_ctime = dev->si_ctime;
260 vap->va_rdev = dev->si_udev;
261 }
262 vap->va_gen = 0;
263 vap->va_flags = 0;
264 vap->va_nlink = de->de_links;
265 vap->va_fileid = de->de_inode;
266
267 return (error);
268}
269
270static int
271devfs_ioctl(ap)
272 struct vop_ioctl_args /* {
273 struct vnode *a_vp;
274 u_long a_command;
275 caddr_t a_data;
276 int a_fflag;
277 struct ucred *a_cred;
278 struct thread *a_td;
279 } */ *ap;
280{
281 int error;
282 struct devfs_mount *dmp;
283
284 dmp = VFSTODEVFS(ap->a_vp->v_mount);
285 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread);
286 devfs_populate(dmp);
287 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
288 error = devfs_rules_ioctl(ap->a_vp->v_mount, ap->a_command, ap->a_data,
289 ap->a_td);
290 return (error);
291}
292
293static int
294devfs_lookupx(ap)
295 struct vop_lookup_args /* {
296 struct vnode * a_dvp;
297 struct vnode ** a_vpp;
298 struct componentname * a_cnp;
299 } */ *ap;
300{
301 struct componentname *cnp;
302 struct vnode *dvp, **vpp;
303 struct thread *td;
304 struct devfs_dirent *de, *dd;
305 struct devfs_dirent **dde;
306 struct devfs_mount *dmp;
307 struct cdev *cdev;
308 int error, flags, nameiop;
309 char specname[SPECNAMELEN + 1], *pname;
310
311 cnp = ap->a_cnp;
312 vpp = ap->a_vpp;
313 dvp = ap->a_dvp;
314 pname = cnp->cn_nameptr;
315 td = cnp->cn_thread;
316 flags = cnp->cn_flags;
317 nameiop = cnp->cn_nameiop;
318 dmp = VFSTODEVFS(dvp->v_mount);
319 dd = dvp->v_data;
320
321 *vpp = NULLVP;
322 cnp->cn_flags &= ~PDIRUNLOCK;
323
324 if ((flags & ISLASTCN) && nameiop == RENAME)
325 return (EOPNOTSUPP);
326
327 if (dvp->v_type != VDIR)
328 return (ENOTDIR);
329
330 if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT))
331 return (EIO);
332
333 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td);
334 if (error)
335 return (error);
336
337 if (cnp->cn_namelen == 1 && *pname == '.') {
338 if ((flags & ISLASTCN) && nameiop != LOOKUP)
339 return (EINVAL);
340 *vpp = dvp;
341 VREF(dvp);
342 return (0);
343 }
344
345 if (flags & ISDOTDOT) {
346 if ((flags & ISLASTCN) && nameiop != LOOKUP)
347 return (EINVAL);
348 VOP_UNLOCK(dvp, 0, td);
349 cnp->cn_flags |= PDIRUNLOCK;
350 de = TAILQ_FIRST(&dd->de_dlist); /* "." */
351 de = TAILQ_NEXT(de, de_list); /* ".." */
352 de = de->de_dir;
353 error = devfs_allocv(de, dvp->v_mount, vpp, td);
354 if (error || ((flags & LOCKPARENT) && (flags & ISLASTCN))) {
355 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
356 cnp->cn_flags &= ~PDIRUNLOCK;
357 }
358 return (error);
359 }
360
361 devfs_populate(dmp);
362 dd = dvp->v_data;
363 TAILQ_FOREACH(de, &dd->de_dlist, de_list) {
364 if (cnp->cn_namelen != de->de_dirent->d_namlen)
365 continue;
366 if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name,
367 de->de_dirent->d_namlen) != 0)
368 continue;
369 if (de->de_flags & DE_WHITEOUT)
370 goto notfound;
371 goto found;
372 }
373
374 if (nameiop == DELETE)
375 goto notfound;
376
377 /*
378 * OK, we didn't have an entry for the name we were asked for
379 * so we try to see if anybody can create it on demand.
380 */
381 pname = devfs_fqpn(specname, dvp, cnp);
382 if (pname == NULL)
383 goto notfound;
384
|
385 cdev = NODEV;
| 385 cdev = NULL;
|
386 EVENTHANDLER_INVOKE(dev_clone, pname, strlen(pname), &cdev);
| 386 EVENTHANDLER_INVOKE(dev_clone, pname, strlen(pname), &cdev);
|
387 if (cdev == NODEV)
| 387 if (cdev == NULL)
|
388 goto notfound;
389
390 devfs_populate(dmp);
391
392 dde = devfs_itode(dmp, cdev->si_inode);
393
394 if (dde == NULL || *dde == NULL || *dde == DE_DELETED)
395 goto notfound;
396
397 if ((*dde)->de_flags & DE_WHITEOUT)
398 goto notfound;
399
400 de = *dde;
401 goto found;
402
403notfound:
404
405 if ((nameiop == CREATE || nameiop == RENAME) &&
406 (flags & (LOCKPARENT | WANTPARENT)) && (flags & ISLASTCN)) {
407 cnp->cn_flags |= SAVENAME;
408 if (!(flags & LOCKPARENT)) {
409 VOP_UNLOCK(dvp, 0, td);
410 cnp->cn_flags |= PDIRUNLOCK;
411 }
412 return (EJUSTRETURN);
413 }
414 return (ENOENT);
415
416
417found:
418
419 if ((cnp->cn_nameiop == DELETE) && (flags & ISLASTCN)) {
420 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
421 if (error)
422 return (error);
423 if (*vpp == dvp) {
424 VREF(dvp);
425 *vpp = dvp;
426 return (0);
427 }
428 error = devfs_allocv(de, dvp->v_mount, vpp, td);
429 if (error)
430 return (error);
431 if (!(flags & LOCKPARENT)) {
432 VOP_UNLOCK(dvp, 0, td);
433 cnp->cn_flags |= PDIRUNLOCK;
434 }
435 return (0);
436 }
437 error = devfs_allocv(de, dvp->v_mount, vpp, td);
438 if (error)
439 return (error);
440 if (!(flags & LOCKPARENT) || !(flags & ISLASTCN)) {
441 VOP_UNLOCK(dvp, 0, td);
442 cnp->cn_flags |= PDIRUNLOCK;
443 }
444 return (0);
445}
446
447static int
448devfs_lookup(struct vop_lookup_args *ap)
449{
450 int j;
451 struct devfs_mount *dmp;
452
453 dmp = VFSTODEVFS(ap->a_dvp->v_mount);
454 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread);
455 j = devfs_lookupx(ap);
456 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
457 return (j);
458}
459
460static int
461devfs_mknod(struct vop_mknod_args *ap)
462/*
463struct vop_mknod_args {
464 struct vnodeop_desc *a_desc;
465 struct vnode *a_dvp;
466 struct vnode **a_vpp;
467 struct componentname *a_cnp;
468 struct vattr *a_vap;
469};
470*/
471{
472 struct componentname *cnp;
473 struct vnode *dvp, **vpp;
474 struct thread *td;
475 struct devfs_dirent *dd, *de;
476 struct devfs_mount *dmp;
477 int error;
478
479 dvp = ap->a_dvp;
480 dmp = VFSTODEVFS(dvp->v_mount);
481 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
482
483 cnp = ap->a_cnp;
484 vpp = ap->a_vpp;
485 td = cnp->cn_thread;
486 dd = dvp->v_data;
487
488 error = ENOENT;
489 TAILQ_FOREACH(de, &dd->de_dlist, de_list) {
490 if (cnp->cn_namelen != de->de_dirent->d_namlen)
491 continue;
492 if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name,
493 de->de_dirent->d_namlen) != 0)
494 continue;
495 if (de->de_flags & DE_WHITEOUT)
496 break;
497 goto notfound;
498 }
499 if (de == NULL)
500 goto notfound;
501 de->de_flags &= ~DE_WHITEOUT;
502 error = devfs_allocv(de, dvp->v_mount, vpp, td);
503notfound:
504 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
505 return (error);
506}
507
508
509static int
510devfs_pathconf(ap)
511 struct vop_pathconf_args /* {
512 struct vnode *a_vp;
513 int a_name;
514 int *a_retval;
515 } */ *ap;
516{
517
518 switch (ap->a_name) {
519 case _PC_NAME_MAX:
520 *ap->a_retval = NAME_MAX;
521 return (0);
522 case _PC_PATH_MAX:
523 *ap->a_retval = PATH_MAX;
524 return (0);
525 case _PC_MAC_PRESENT:
526#ifdef MAC
527 /*
528 * If MAC is enabled, devfs automatically supports
529 * trivial non-persistant label storage.
530 */
531 *ap->a_retval = 1;
532#else
533 *ap->a_retval = 0;
534#endif
535 return (0);
536 default:
537 return (vop_stdpathconf(ap));
538 }
539 /* NOTREACHED */
540}
541
542static int
543devfs_read(ap)
544 struct vop_read_args /* {
545 struct vnode *a_vp;
546 struct uio *a_uio;
547 int a_ioflag;
548 struct ucred *a_cred;
549 } */ *ap;
550{
551
552 if (ap->a_vp->v_type != VDIR)
553 return (EINVAL);
554 return (VOP_READDIR(ap->a_vp, ap->a_uio, ap->a_cred, NULL, NULL, NULL));
555}
556
557static int
558devfs_readdir(ap)
559 struct vop_readdir_args /* {
560 struct vnode *a_vp;
561 struct uio *a_uio;
562 struct ucred *a_cred;
563 int *a_eofflag;
564 int *a_ncookies;
565 u_long **a_cookies;
566 } */ *ap;
567{
568 int error;
569 struct uio *uio;
570 struct dirent *dp;
571 struct devfs_dirent *dd;
572 struct devfs_dirent *de;
573 struct devfs_mount *dmp;
574 off_t off, oldoff;
575 int ncookies = 0;
576 u_long *cookiebuf, *cookiep;
577 struct dirent *dps, *dpe;
578
579 if (ap->a_vp->v_type != VDIR)
580 return (ENOTDIR);
581
582 uio = ap->a_uio;
583 if (uio->uio_offset < 0)
584 return (EINVAL);
585
586 dmp = VFSTODEVFS(ap->a_vp->v_mount);
587 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread);
588 devfs_populate(dmp);
589 error = 0;
590 de = ap->a_vp->v_data;
591 off = 0;
592 oldoff = uio->uio_offset;
593 TAILQ_FOREACH(dd, &de->de_dlist, de_list) {
594 if (dd->de_flags & DE_WHITEOUT)
595 continue;
596 if (dd->de_dirent->d_type == DT_DIR)
597 de = dd->de_dir;
598 else
599 de = dd;
600 dp = dd->de_dirent;
601 if (dp->d_reclen > uio->uio_resid)
602 break;
603 dp->d_fileno = de->de_inode;
604 if (off >= uio->uio_offset) {
605 ncookies++;
606 error = uiomove(dp, dp->d_reclen, uio);
607 if (error)
608 break;
609 }
610 off += dp->d_reclen;
611 }
612 if( !error && ap->a_ncookies != NULL && ap->a_cookies != NULL ) {
613 MALLOC(cookiebuf, u_long *, ncookies * sizeof(u_long),
614 M_TEMP, M_WAITOK);
615 cookiep = cookiebuf;
616 dps = (struct dirent *)((char *)uio->uio_iov->iov_base -
617 (uio->uio_offset - oldoff));
618 dpe = (struct dirent *) uio->uio_iov->iov_base;
619 for( dp = dps;
620 dp < dpe;
621 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) {
622 oldoff += dp->d_reclen;
623 *cookiep++ = (u_long) oldoff;
624 }
625 *ap->a_ncookies = ncookies;
626 *ap->a_cookies = cookiebuf;
627 }
628 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
629 uio->uio_offset = off;
630 return (error);
631}
632
633static int
634devfs_readlink(ap)
635 struct vop_readlink_args /* {
636 struct vnode *a_vp;
637 struct uio *a_uio;
638 struct ucred *a_cead;
639 } */ *ap;
640{
641 int error;
642 struct devfs_dirent *de;
643
644 de = ap->a_vp->v_data;
645 error = uiomove(de->de_symlink, strlen(de->de_symlink), ap->a_uio);
646 return (error);
647}
648
649static int
650devfs_reclaim(ap)
651 struct vop_reclaim_args /* {
652 struct vnode *a_vp;
653 } */ *ap;
654{
655 struct vnode *vp = ap->a_vp;
656 struct devfs_dirent *de;
657 int i;
658
659 de = vp->v_data;
660 if (de != NULL)
661 de->de_vnode = NULL;
662 vp->v_data = NULL;
| 388 goto notfound;
389
390 devfs_populate(dmp);
391
392 dde = devfs_itode(dmp, cdev->si_inode);
393
394 if (dde == NULL || *dde == NULL || *dde == DE_DELETED)
395 goto notfound;
396
397 if ((*dde)->de_flags & DE_WHITEOUT)
398 goto notfound;
399
400 de = *dde;
401 goto found;
402
403notfound:
404
405 if ((nameiop == CREATE || nameiop == RENAME) &&
406 (flags & (LOCKPARENT | WANTPARENT)) && (flags & ISLASTCN)) {
407 cnp->cn_flags |= SAVENAME;
408 if (!(flags & LOCKPARENT)) {
409 VOP_UNLOCK(dvp, 0, td);
410 cnp->cn_flags |= PDIRUNLOCK;
411 }
412 return (EJUSTRETURN);
413 }
414 return (ENOENT);
415
416
417found:
418
419 if ((cnp->cn_nameiop == DELETE) && (flags & ISLASTCN)) {
420 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
421 if (error)
422 return (error);
423 if (*vpp == dvp) {
424 VREF(dvp);
425 *vpp = dvp;
426 return (0);
427 }
428 error = devfs_allocv(de, dvp->v_mount, vpp, td);
429 if (error)
430 return (error);
431 if (!(flags & LOCKPARENT)) {
432 VOP_UNLOCK(dvp, 0, td);
433 cnp->cn_flags |= PDIRUNLOCK;
434 }
435 return (0);
436 }
437 error = devfs_allocv(de, dvp->v_mount, vpp, td);
438 if (error)
439 return (error);
440 if (!(flags & LOCKPARENT) || !(flags & ISLASTCN)) {
441 VOP_UNLOCK(dvp, 0, td);
442 cnp->cn_flags |= PDIRUNLOCK;
443 }
444 return (0);
445}
446
447static int
448devfs_lookup(struct vop_lookup_args *ap)
449{
450 int j;
451 struct devfs_mount *dmp;
452
453 dmp = VFSTODEVFS(ap->a_dvp->v_mount);
454 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread);
455 j = devfs_lookupx(ap);
456 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
457 return (j);
458}
459
460static int
461devfs_mknod(struct vop_mknod_args *ap)
462/*
463struct vop_mknod_args {
464 struct vnodeop_desc *a_desc;
465 struct vnode *a_dvp;
466 struct vnode **a_vpp;
467 struct componentname *a_cnp;
468 struct vattr *a_vap;
469};
470*/
471{
472 struct componentname *cnp;
473 struct vnode *dvp, **vpp;
474 struct thread *td;
475 struct devfs_dirent *dd, *de;
476 struct devfs_mount *dmp;
477 int error;
478
479 dvp = ap->a_dvp;
480 dmp = VFSTODEVFS(dvp->v_mount);
481 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
482
483 cnp = ap->a_cnp;
484 vpp = ap->a_vpp;
485 td = cnp->cn_thread;
486 dd = dvp->v_data;
487
488 error = ENOENT;
489 TAILQ_FOREACH(de, &dd->de_dlist, de_list) {
490 if (cnp->cn_namelen != de->de_dirent->d_namlen)
491 continue;
492 if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name,
493 de->de_dirent->d_namlen) != 0)
494 continue;
495 if (de->de_flags & DE_WHITEOUT)
496 break;
497 goto notfound;
498 }
499 if (de == NULL)
500 goto notfound;
501 de->de_flags &= ~DE_WHITEOUT;
502 error = devfs_allocv(de, dvp->v_mount, vpp, td);
503notfound:
504 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
505 return (error);
506}
507
508
509static int
510devfs_pathconf(ap)
511 struct vop_pathconf_args /* {
512 struct vnode *a_vp;
513 int a_name;
514 int *a_retval;
515 } */ *ap;
516{
517
518 switch (ap->a_name) {
519 case _PC_NAME_MAX:
520 *ap->a_retval = NAME_MAX;
521 return (0);
522 case _PC_PATH_MAX:
523 *ap->a_retval = PATH_MAX;
524 return (0);
525 case _PC_MAC_PRESENT:
526#ifdef MAC
527 /*
528 * If MAC is enabled, devfs automatically supports
529 * trivial non-persistant label storage.
530 */
531 *ap->a_retval = 1;
532#else
533 *ap->a_retval = 0;
534#endif
535 return (0);
536 default:
537 return (vop_stdpathconf(ap));
538 }
539 /* NOTREACHED */
540}
541
542static int
543devfs_read(ap)
544 struct vop_read_args /* {
545 struct vnode *a_vp;
546 struct uio *a_uio;
547 int a_ioflag;
548 struct ucred *a_cred;
549 } */ *ap;
550{
551
552 if (ap->a_vp->v_type != VDIR)
553 return (EINVAL);
554 return (VOP_READDIR(ap->a_vp, ap->a_uio, ap->a_cred, NULL, NULL, NULL));
555}
556
557static int
558devfs_readdir(ap)
559 struct vop_readdir_args /* {
560 struct vnode *a_vp;
561 struct uio *a_uio;
562 struct ucred *a_cred;
563 int *a_eofflag;
564 int *a_ncookies;
565 u_long **a_cookies;
566 } */ *ap;
567{
568 int error;
569 struct uio *uio;
570 struct dirent *dp;
571 struct devfs_dirent *dd;
572 struct devfs_dirent *de;
573 struct devfs_mount *dmp;
574 off_t off, oldoff;
575 int ncookies = 0;
576 u_long *cookiebuf, *cookiep;
577 struct dirent *dps, *dpe;
578
579 if (ap->a_vp->v_type != VDIR)
580 return (ENOTDIR);
581
582 uio = ap->a_uio;
583 if (uio->uio_offset < 0)
584 return (EINVAL);
585
586 dmp = VFSTODEVFS(ap->a_vp->v_mount);
587 lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread);
588 devfs_populate(dmp);
589 error = 0;
590 de = ap->a_vp->v_data;
591 off = 0;
592 oldoff = uio->uio_offset;
593 TAILQ_FOREACH(dd, &de->de_dlist, de_list) {
594 if (dd->de_flags & DE_WHITEOUT)
595 continue;
596 if (dd->de_dirent->d_type == DT_DIR)
597 de = dd->de_dir;
598 else
599 de = dd;
600 dp = dd->de_dirent;
601 if (dp->d_reclen > uio->uio_resid)
602 break;
603 dp->d_fileno = de->de_inode;
604 if (off >= uio->uio_offset) {
605 ncookies++;
606 error = uiomove(dp, dp->d_reclen, uio);
607 if (error)
608 break;
609 }
610 off += dp->d_reclen;
611 }
612 if( !error && ap->a_ncookies != NULL && ap->a_cookies != NULL ) {
613 MALLOC(cookiebuf, u_long *, ncookies * sizeof(u_long),
614 M_TEMP, M_WAITOK);
615 cookiep = cookiebuf;
616 dps = (struct dirent *)((char *)uio->uio_iov->iov_base -
617 (uio->uio_offset - oldoff));
618 dpe = (struct dirent *) uio->uio_iov->iov_base;
619 for( dp = dps;
620 dp < dpe;
621 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) {
622 oldoff += dp->d_reclen;
623 *cookiep++ = (u_long) oldoff;
624 }
625 *ap->a_ncookies = ncookies;
626 *ap->a_cookies = cookiebuf;
627 }
628 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
629 uio->uio_offset = off;
630 return (error);
631}
632
633static int
634devfs_readlink(ap)
635 struct vop_readlink_args /* {
636 struct vnode *a_vp;
637 struct uio *a_uio;
638 struct ucred *a_cead;
639 } */ *ap;
640{
641 int error;
642 struct devfs_dirent *de;
643
644 de = ap->a_vp->v_data;
645 error = uiomove(de->de_symlink, strlen(de->de_symlink), ap->a_uio);
646 return (error);
647}
648
649static int
650devfs_reclaim(ap)
651 struct vop_reclaim_args /* {
652 struct vnode *a_vp;
653 } */ *ap;
654{
655 struct vnode *vp = ap->a_vp;
656 struct devfs_dirent *de;
657 int i;
658
659 de = vp->v_data;
660 if (de != NULL)
661 de->de_vnode = NULL;
662 vp->v_data = NULL;
|
663 if (vp->v_rdev != NODEV && vp->v_rdev != NULL) {
| 663 if (vp->v_rdev != NULL && vp->v_rdev != NULL) {
|
664 i = vcount(vp);
665 if ((vp->v_rdev->si_flags & SI_CHEAPCLONE) && i == 0 &&
666 (vp->v_rdev->si_flags & SI_NAMED))
667 destroy_dev(vp->v_rdev);
668 }
669 return (0);
670}
671
672static int
673devfs_remove(ap)
674 struct vop_remove_args /* {
675 struct vnode *a_dvp;
676 struct vnode *a_vp;
677 struct componentname *a_cnp;
678 } */ *ap;
679{
680 struct vnode *vp = ap->a_vp;
681 struct devfs_dirent *dd;
682 struct devfs_dirent *de;
683 struct devfs_mount *dmp = VFSTODEVFS(vp->v_mount);
684
685 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
686 dd = ap->a_dvp->v_data;
687 de = vp->v_data;
688 if (de->de_dirent->d_type == DT_LNK) {
689 TAILQ_REMOVE(&dd->de_dlist, de, de_list);
690 if (de->de_vnode)
691 de->de_vnode->v_data = NULL;
692#ifdef MAC
693 mac_destroy_devfsdirent(de);
694#endif
695 FREE(de, M_DEVFS);
696 } else {
697 de->de_flags |= DE_WHITEOUT;
698 }
699 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
700 return (0);
701}
702
703/*
704 * Revoke is called on a tty when a terminal session ends. The vnode
705 * is orphaned by setting v_op to deadfs so we need to let go of it
706 * as well so that we create a new one next time around.
707 */
708static int
709devfs_revoke(ap)
710 struct vop_revoke_args /* {
711 struct vnode *a_vp;
712 int a_flags;
713 } */ *ap;
714{
715 struct vnode *vp = ap->a_vp;
716 struct devfs_dirent *de;
717
718 de = vp->v_data;
719 de->de_vnode = NULL;
720 vop_revoke(ap);
721 return (0);
722}
723
724static int
725devfs_setattr(ap)
726 struct vop_setattr_args /* {
727 struct vnode *a_vp;
728 struct vattr *a_vap;
729 struct ucred *a_cred;
730 struct proc *a_p;
731 } */ *ap;
732{
733 struct devfs_dirent *de;
734 struct vattr *vap;
735 struct vnode *vp;
736 int c, error;
737 uid_t uid;
738 gid_t gid;
739
740 vap = ap->a_vap;
741 vp = ap->a_vp;
742 if ((vap->va_type != VNON) ||
743 (vap->va_nlink != VNOVAL) ||
744 (vap->va_fsid != VNOVAL) ||
745 (vap->va_fileid != VNOVAL) ||
746 (vap->va_blocksize != VNOVAL) ||
747 (vap->va_flags != VNOVAL && vap->va_flags != 0) ||
748 (vap->va_rdev != VNOVAL) ||
749 ((int)vap->va_bytes != VNOVAL) ||
750 (vap->va_gen != VNOVAL)) {
751 return (EINVAL);
752 }
753
754 de = vp->v_data;
755 if (vp->v_type == VDIR)
756 de = de->de_dir;
757
758 error = c = 0;
759 if (vap->va_uid == (uid_t)VNOVAL)
760 uid = de->de_uid;
761 else
762 uid = vap->va_uid;
763 if (vap->va_gid == (gid_t)VNOVAL)
764 gid = de->de_gid;
765 else
766 gid = vap->va_gid;
767 if (uid != de->de_uid || gid != de->de_gid) {
768 if (((ap->a_cred->cr_uid != de->de_uid) || uid != de->de_uid ||
769 (gid != de->de_gid && !groupmember(gid, ap->a_cred))) &&
770 (error = suser_cred(ap->a_td->td_ucred, PRISON_ROOT)) != 0)
771 return (error);
772 de->de_uid = uid;
773 de->de_gid = gid;
774 c = 1;
775 }
776
777 if (vap->va_mode != (mode_t)VNOVAL) {
778 if ((ap->a_cred->cr_uid != de->de_uid) &&
779 (error = suser_cred(ap->a_td->td_ucred, PRISON_ROOT)))
780 return (error);
781 de->de_mode = vap->va_mode;
782 c = 1;
783 }
784
785 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
786 /* See the comment in ufs_vnops::ufs_setattr(). */
787 if ((error = VOP_ACCESS(vp, VADMIN, ap->a_cred, ap->a_td)) &&
788 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
789 (error = VOP_ACCESS(vp, VWRITE, ap->a_cred, ap->a_td))))
790 return (error);
791 if (vap->va_atime.tv_sec != VNOVAL) {
792 if (vp->v_type == VCHR)
793 vp->v_rdev->si_atime = vap->va_atime;
794 else
795 de->de_atime = vap->va_atime;
796 }
797 if (vap->va_mtime.tv_sec != VNOVAL) {
798 if (vp->v_type == VCHR)
799 vp->v_rdev->si_mtime = vap->va_mtime;
800 else
801 de->de_mtime = vap->va_mtime;
802 }
803 c = 1;
804 }
805
806 if (c) {
807 if (vp->v_type == VCHR)
808 vfs_timestamp(&vp->v_rdev->si_ctime);
809 else
810 vfs_timestamp(&de->de_mtime);
811 }
812 return (0);
813}
814
815#ifdef MAC
816static int
817devfs_setlabel(ap)
818 struct vop_setlabel_args /* {
819 struct vnode *a_vp;
820 struct mac *a_label;
821 struct ucred *a_cred;
822 struct thread *a_td;
823 } */ *ap;
824{
825 struct vnode *vp;
826 struct devfs_dirent *de;
827
828 vp = ap->a_vp;
829 de = vp->v_data;
830
831 mac_relabel_vnode(ap->a_cred, vp, ap->a_label);
832 mac_update_devfsdirent(vp->v_mount, de, vp);
833
834 return (0);
835}
836#endif
837
838static int
839devfs_symlink(ap)
840 struct vop_symlink_args /* {
841 struct vnode *a_dvp;
842 struct vnode **a_vpp;
843 struct componentname *a_cnp;
844 struct vattr *a_vap;
845 char *a_target;
846 } */ *ap;
847{
848 int i, error;
849 struct devfs_dirent *dd;
850 struct devfs_dirent *de;
851 struct devfs_mount *dmp;
852
853 error = suser(ap->a_cnp->cn_thread);
854 if (error)
855 return(error);
856 dmp = VFSTODEVFS(ap->a_dvp->v_mount);
857 dd = ap->a_dvp->v_data;
858 de = devfs_newdirent(ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen);
859 de->de_uid = 0;
860 de->de_gid = 0;
861 de->de_mode = 0755;
862 de->de_inode = dmp->dm_inode++;
863 de->de_dirent->d_type = DT_LNK;
864 i = strlen(ap->a_target) + 1;
865 MALLOC(de->de_symlink, char *, i, M_DEVFS, M_WAITOK);
866 bcopy(ap->a_target, de->de_symlink, i);
867 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
868#ifdef MAC
869 mac_create_devfs_symlink(ap->a_cnp->cn_cred, dmp->dm_mount, dd, de);
870#endif
871 TAILQ_INSERT_TAIL(&dd->de_dlist, de, de_list);
872 devfs_allocv(de, ap->a_dvp->v_mount, ap->a_vpp, 0);
873 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
874 return (0);
875}
876
877static struct vnodeopv_entry_desc devfs_vnodeop_entries[] = {
878 { &vop_default_desc, (vop_t *) vop_defaultop },
879 { &vop_access_desc, (vop_t *) devfs_access },
880 { &vop_getattr_desc, (vop_t *) devfs_getattr },
881 { &vop_ioctl_desc, (vop_t *) devfs_ioctl },
882 { &vop_lookup_desc, (vop_t *) devfs_lookup },
883 { &vop_mknod_desc, (vop_t *) devfs_mknod },
884 { &vop_pathconf_desc, (vop_t *) devfs_pathconf },
885 { &vop_read_desc, (vop_t *) devfs_read },
886 { &vop_readdir_desc, (vop_t *) devfs_readdir },
887 { &vop_readlink_desc, (vop_t *) devfs_readlink },
888 { &vop_reclaim_desc, (vop_t *) devfs_reclaim },
889 { &vop_remove_desc, (vop_t *) devfs_remove },
890 { &vop_revoke_desc, (vop_t *) devfs_revoke },
891 { &vop_setattr_desc, (vop_t *) devfs_setattr },
892#ifdef MAC
893 { &vop_setlabel_desc, (vop_t *) devfs_setlabel },
894#endif
895 { &vop_symlink_desc, (vop_t *) devfs_symlink },
896 { NULL, NULL }
897};
898static struct vnodeopv_desc devfs_vnodeop_opv_desc =
899 { &devfs_vnodeop_p, devfs_vnodeop_entries };
900
901VNODEOP_SET(devfs_vnodeop_opv_desc);
902
903static struct vnodeopv_entry_desc devfs_specop_entries[] = {
904 { &vop_default_desc, (vop_t *) spec_vnoperate },
905 { &vop_access_desc, (vop_t *) devfs_access },
906 { &vop_getattr_desc, (vop_t *) devfs_getattr },
907 { &vop_pathconf_desc, (vop_t *) devfs_pathconf },
908 { &vop_reclaim_desc, (vop_t *) devfs_reclaim },
909 { &vop_remove_desc, (vop_t *) devfs_remove },
910 { &vop_revoke_desc, (vop_t *) devfs_revoke },
911 { &vop_setattr_desc, (vop_t *) devfs_setattr },
912#ifdef MAC
913 { &vop_setlabel_desc, (vop_t *) devfs_setlabel },
914#endif
915 { NULL, NULL }
916};
917static struct vnodeopv_desc devfs_specop_opv_desc =
918 { &devfs_specop_p, devfs_specop_entries };
919
920VNODEOP_SET(devfs_specop_opv_desc);
| 664 i = vcount(vp);
665 if ((vp->v_rdev->si_flags & SI_CHEAPCLONE) && i == 0 &&
666 (vp->v_rdev->si_flags & SI_NAMED))
667 destroy_dev(vp->v_rdev);
668 }
669 return (0);
670}
671
672static int
673devfs_remove(ap)
674 struct vop_remove_args /* {
675 struct vnode *a_dvp;
676 struct vnode *a_vp;
677 struct componentname *a_cnp;
678 } */ *ap;
679{
680 struct vnode *vp = ap->a_vp;
681 struct devfs_dirent *dd;
682 struct devfs_dirent *de;
683 struct devfs_mount *dmp = VFSTODEVFS(vp->v_mount);
684
685 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
686 dd = ap->a_dvp->v_data;
687 de = vp->v_data;
688 if (de->de_dirent->d_type == DT_LNK) {
689 TAILQ_REMOVE(&dd->de_dlist, de, de_list);
690 if (de->de_vnode)
691 de->de_vnode->v_data = NULL;
692#ifdef MAC
693 mac_destroy_devfsdirent(de);
694#endif
695 FREE(de, M_DEVFS);
696 } else {
697 de->de_flags |= DE_WHITEOUT;
698 }
699 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
700 return (0);
701}
702
703/*
704 * Revoke is called on a tty when a terminal session ends. The vnode
705 * is orphaned by setting v_op to deadfs so we need to let go of it
706 * as well so that we create a new one next time around.
707 */
708static int
709devfs_revoke(ap)
710 struct vop_revoke_args /* {
711 struct vnode *a_vp;
712 int a_flags;
713 } */ *ap;
714{
715 struct vnode *vp = ap->a_vp;
716 struct devfs_dirent *de;
717
718 de = vp->v_data;
719 de->de_vnode = NULL;
720 vop_revoke(ap);
721 return (0);
722}
723
724static int
725devfs_setattr(ap)
726 struct vop_setattr_args /* {
727 struct vnode *a_vp;
728 struct vattr *a_vap;
729 struct ucred *a_cred;
730 struct proc *a_p;
731 } */ *ap;
732{
733 struct devfs_dirent *de;
734 struct vattr *vap;
735 struct vnode *vp;
736 int c, error;
737 uid_t uid;
738 gid_t gid;
739
740 vap = ap->a_vap;
741 vp = ap->a_vp;
742 if ((vap->va_type != VNON) ||
743 (vap->va_nlink != VNOVAL) ||
744 (vap->va_fsid != VNOVAL) ||
745 (vap->va_fileid != VNOVAL) ||
746 (vap->va_blocksize != VNOVAL) ||
747 (vap->va_flags != VNOVAL && vap->va_flags != 0) ||
748 (vap->va_rdev != VNOVAL) ||
749 ((int)vap->va_bytes != VNOVAL) ||
750 (vap->va_gen != VNOVAL)) {
751 return (EINVAL);
752 }
753
754 de = vp->v_data;
755 if (vp->v_type == VDIR)
756 de = de->de_dir;
757
758 error = c = 0;
759 if (vap->va_uid == (uid_t)VNOVAL)
760 uid = de->de_uid;
761 else
762 uid = vap->va_uid;
763 if (vap->va_gid == (gid_t)VNOVAL)
764 gid = de->de_gid;
765 else
766 gid = vap->va_gid;
767 if (uid != de->de_uid || gid != de->de_gid) {
768 if (((ap->a_cred->cr_uid != de->de_uid) || uid != de->de_uid ||
769 (gid != de->de_gid && !groupmember(gid, ap->a_cred))) &&
770 (error = suser_cred(ap->a_td->td_ucred, PRISON_ROOT)) != 0)
771 return (error);
772 de->de_uid = uid;
773 de->de_gid = gid;
774 c = 1;
775 }
776
777 if (vap->va_mode != (mode_t)VNOVAL) {
778 if ((ap->a_cred->cr_uid != de->de_uid) &&
779 (error = suser_cred(ap->a_td->td_ucred, PRISON_ROOT)))
780 return (error);
781 de->de_mode = vap->va_mode;
782 c = 1;
783 }
784
785 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
786 /* See the comment in ufs_vnops::ufs_setattr(). */
787 if ((error = VOP_ACCESS(vp, VADMIN, ap->a_cred, ap->a_td)) &&
788 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
789 (error = VOP_ACCESS(vp, VWRITE, ap->a_cred, ap->a_td))))
790 return (error);
791 if (vap->va_atime.tv_sec != VNOVAL) {
792 if (vp->v_type == VCHR)
793 vp->v_rdev->si_atime = vap->va_atime;
794 else
795 de->de_atime = vap->va_atime;
796 }
797 if (vap->va_mtime.tv_sec != VNOVAL) {
798 if (vp->v_type == VCHR)
799 vp->v_rdev->si_mtime = vap->va_mtime;
800 else
801 de->de_mtime = vap->va_mtime;
802 }
803 c = 1;
804 }
805
806 if (c) {
807 if (vp->v_type == VCHR)
808 vfs_timestamp(&vp->v_rdev->si_ctime);
809 else
810 vfs_timestamp(&de->de_mtime);
811 }
812 return (0);
813}
814
815#ifdef MAC
816static int
817devfs_setlabel(ap)
818 struct vop_setlabel_args /* {
819 struct vnode *a_vp;
820 struct mac *a_label;
821 struct ucred *a_cred;
822 struct thread *a_td;
823 } */ *ap;
824{
825 struct vnode *vp;
826 struct devfs_dirent *de;
827
828 vp = ap->a_vp;
829 de = vp->v_data;
830
831 mac_relabel_vnode(ap->a_cred, vp, ap->a_label);
832 mac_update_devfsdirent(vp->v_mount, de, vp);
833
834 return (0);
835}
836#endif
837
838static int
839devfs_symlink(ap)
840 struct vop_symlink_args /* {
841 struct vnode *a_dvp;
842 struct vnode **a_vpp;
843 struct componentname *a_cnp;
844 struct vattr *a_vap;
845 char *a_target;
846 } */ *ap;
847{
848 int i, error;
849 struct devfs_dirent *dd;
850 struct devfs_dirent *de;
851 struct devfs_mount *dmp;
852
853 error = suser(ap->a_cnp->cn_thread);
854 if (error)
855 return(error);
856 dmp = VFSTODEVFS(ap->a_dvp->v_mount);
857 dd = ap->a_dvp->v_data;
858 de = devfs_newdirent(ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen);
859 de->de_uid = 0;
860 de->de_gid = 0;
861 de->de_mode = 0755;
862 de->de_inode = dmp->dm_inode++;
863 de->de_dirent->d_type = DT_LNK;
864 i = strlen(ap->a_target) + 1;
865 MALLOC(de->de_symlink, char *, i, M_DEVFS, M_WAITOK);
866 bcopy(ap->a_target, de->de_symlink, i);
867 lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
868#ifdef MAC
869 mac_create_devfs_symlink(ap->a_cnp->cn_cred, dmp->dm_mount, dd, de);
870#endif
871 TAILQ_INSERT_TAIL(&dd->de_dlist, de, de_list);
872 devfs_allocv(de, ap->a_dvp->v_mount, ap->a_vpp, 0);
873 lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
874 return (0);
875}
876
877static struct vnodeopv_entry_desc devfs_vnodeop_entries[] = {
878 { &vop_default_desc, (vop_t *) vop_defaultop },
879 { &vop_access_desc, (vop_t *) devfs_access },
880 { &vop_getattr_desc, (vop_t *) devfs_getattr },
881 { &vop_ioctl_desc, (vop_t *) devfs_ioctl },
882 { &vop_lookup_desc, (vop_t *) devfs_lookup },
883 { &vop_mknod_desc, (vop_t *) devfs_mknod },
884 { &vop_pathconf_desc, (vop_t *) devfs_pathconf },
885 { &vop_read_desc, (vop_t *) devfs_read },
886 { &vop_readdir_desc, (vop_t *) devfs_readdir },
887 { &vop_readlink_desc, (vop_t *) devfs_readlink },
888 { &vop_reclaim_desc, (vop_t *) devfs_reclaim },
889 { &vop_remove_desc, (vop_t *) devfs_remove },
890 { &vop_revoke_desc, (vop_t *) devfs_revoke },
891 { &vop_setattr_desc, (vop_t *) devfs_setattr },
892#ifdef MAC
893 { &vop_setlabel_desc, (vop_t *) devfs_setlabel },
894#endif
895 { &vop_symlink_desc, (vop_t *) devfs_symlink },
896 { NULL, NULL }
897};
898static struct vnodeopv_desc devfs_vnodeop_opv_desc =
899 { &devfs_vnodeop_p, devfs_vnodeop_entries };
900
901VNODEOP_SET(devfs_vnodeop_opv_desc);
902
903static struct vnodeopv_entry_desc devfs_specop_entries[] = {
904 { &vop_default_desc, (vop_t *) spec_vnoperate },
905 { &vop_access_desc, (vop_t *) devfs_access },
906 { &vop_getattr_desc, (vop_t *) devfs_getattr },
907 { &vop_pathconf_desc, (vop_t *) devfs_pathconf },
908 { &vop_reclaim_desc, (vop_t *) devfs_reclaim },
909 { &vop_remove_desc, (vop_t *) devfs_remove },
910 { &vop_revoke_desc, (vop_t *) devfs_revoke },
911 { &vop_setattr_desc, (vop_t *) devfs_setattr },
912#ifdef MAC
913 { &vop_setlabel_desc, (vop_t *) devfs_setlabel },
914#endif
915 { NULL, NULL }
916};
917static struct vnodeopv_desc devfs_specop_opv_desc =
918 { &devfs_specop_p, devfs_specop_entries };
919
920VNODEOP_SET(devfs_specop_opv_desc);
|