1/*
2 * Copyright (c) 1992, 1993, 1995
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_vfsops.c 8.10 (Berkeley) 5/14/95
32 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vfsops.c 1.36
33 *
| 1/*
2 * Copyright (c) 1992, 1993, 1995
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_vfsops.c 8.10 (Berkeley) 5/14/95
32 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vfsops.c 1.36
33 *
|
34 * $FreeBSD: head/sys/fs/devfs/devfs_vfsops.c 105210 2002-10-16 07:51:18Z phk $
| 34 * $FreeBSD: head/sys/fs/devfs/devfs_vfsops.c 107698 2002-12-09 03:44:28Z rwatson $
|
35 */
36
37#include "opt_devfs.h"
38#include "opt_mac.h"
39#ifndef NODEVFS
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/lock.h>
45#include <sys/mac.h>
46#include <sys/malloc.h>
47#include <sys/mount.h>
48#include <sys/proc.h>
49#include <sys/vnode.h>
50
51#include <fs/devfs/devfs.h>
52
53MALLOC_DEFINE(M_DEVFS, "DEVFS", "DEVFS data");
54
55static vfs_nmount_t devfs_nmount;
56static vfs_unmount_t devfs_unmount;
57static vfs_root_t devfs_root;
58static vfs_statfs_t devfs_statfs;
59
60/*
61 * Mount the filesystem
62 */
63static int
64devfs_nmount(mp, ndp, td)
65 struct mount *mp;
66 struct nameidata *ndp;
67 struct thread *td;
68{
69 int error;
70 struct devfs_mount *fmp;
71 struct vnode *rvp;
72
73 error = 0;
74 /*
75 * XXX: flag changes.
76 */
77 if (mp->mnt_flag & MNT_UPDATE)
78 return (EOPNOTSUPP);
79
80 MALLOC(fmp, struct devfs_mount *, sizeof(struct devfs_mount),
81 M_DEVFS, M_WAITOK | M_ZERO);
82 MALLOC(fmp->dm_dirent, struct devfs_dirent **,
83 sizeof(struct devfs_dirent *) * NDEVFSINO,
84 M_DEVFS, M_WAITOK | M_ZERO);
85 lockinit(&fmp->dm_lock, PVFS, "devfs", 0, LK_NOPAUSE);
86
87 mp->mnt_flag |= MNT_LOCAL;
88#ifdef MAC
89 mp->mnt_flag |= MNT_MULTILABEL;
90#endif
| 35 */
36
37#include "opt_devfs.h"
38#include "opt_mac.h"
39#ifndef NODEVFS
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/lock.h>
45#include <sys/mac.h>
46#include <sys/malloc.h>
47#include <sys/mount.h>
48#include <sys/proc.h>
49#include <sys/vnode.h>
50
51#include <fs/devfs/devfs.h>
52
53MALLOC_DEFINE(M_DEVFS, "DEVFS", "DEVFS data");
54
55static vfs_nmount_t devfs_nmount;
56static vfs_unmount_t devfs_unmount;
57static vfs_root_t devfs_root;
58static vfs_statfs_t devfs_statfs;
59
60/*
61 * Mount the filesystem
62 */
63static int
64devfs_nmount(mp, ndp, td)
65 struct mount *mp;
66 struct nameidata *ndp;
67 struct thread *td;
68{
69 int error;
70 struct devfs_mount *fmp;
71 struct vnode *rvp;
72
73 error = 0;
74 /*
75 * XXX: flag changes.
76 */
77 if (mp->mnt_flag & MNT_UPDATE)
78 return (EOPNOTSUPP);
79
80 MALLOC(fmp, struct devfs_mount *, sizeof(struct devfs_mount),
81 M_DEVFS, M_WAITOK | M_ZERO);
82 MALLOC(fmp->dm_dirent, struct devfs_dirent **,
83 sizeof(struct devfs_dirent *) * NDEVFSINO,
84 M_DEVFS, M_WAITOK | M_ZERO);
85 lockinit(&fmp->dm_lock, PVFS, "devfs", 0, LK_NOPAUSE);
86
87 mp->mnt_flag |= MNT_LOCAL;
88#ifdef MAC
89 mp->mnt_flag |= MNT_MULTILABEL;
90#endif
|
| 91 fmp->dm_mount = mp;
|
91 mp->mnt_data = (qaddr_t) fmp;
92 vfs_getnewfsid(mp);
93
94 fmp->dm_inode = DEVFSINOMOUNT;
95
96 fmp->dm_rootdir = devfs_vmkdir("(root)", 6, NULL);
97 fmp->dm_rootdir->de_inode = 2;
98#ifdef MAC
| 92 mp->mnt_data = (qaddr_t) fmp;
93 vfs_getnewfsid(mp);
94
95 fmp->dm_inode = DEVFSINOMOUNT;
96
97 fmp->dm_rootdir = devfs_vmkdir("(root)", 6, NULL);
98 fmp->dm_rootdir->de_inode = 2;
99#ifdef MAC
|
99 mac_create_devfs_directory("", 0, fmp->dm_rootdir);
| 100 mac_create_devfs_directory(mp, "", 0, fmp->dm_rootdir);
|
100#endif
101 fmp->dm_basedir = fmp->dm_rootdir;
102 devfs_rules_newmount(fmp, td);
103
104 error = devfs_root(mp, &rvp);
105 if (error) {
106 lockdestroy(&fmp->dm_lock);
107 FREE(fmp, M_DEVFS);
108 return (error);
109 }
110 VOP_UNLOCK(rvp, 0, td);
111
112 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
113 bcopy("devfs", mp->mnt_stat.f_mntfromname, sizeof("devfs"));
114 (void)devfs_statfs(mp, &mp->mnt_stat, td);
115
116 return (0);
117}
118
119static int
120devfs_unmount(mp, mntflags, td)
121 struct mount *mp;
122 int mntflags;
123 struct thread *td;
124{
125 int error;
126 int flags = 0;
127 struct devfs_mount *fmp;
128
129 fmp = VFSTODEVFS(mp);
130 if (mntflags & MNT_FORCE)
131 flags |= FORCECLOSE;
132 /* There is 1 extra root vnode reference from devfs_mount(). */
133 error = vflush(mp, 1, flags);
134 if (error)
135 return (error);
136 devfs_purge(fmp->dm_rootdir);
137 mp->mnt_data = 0;
138 lockdestroy(&fmp->dm_lock);
139 free(fmp->dm_dirent, M_DEVFS);
140 free(fmp, M_DEVFS);
141 return 0;
142}
143
144/* Return locked reference to root. */
145
146static int
147devfs_root(mp, vpp)
148 struct mount *mp;
149 struct vnode **vpp;
150{
151 int error;
152 struct thread *td;
153 struct vnode *vp;
154 struct devfs_mount *dmp;
155
156 td = curthread; /* XXX */
157 dmp = VFSTODEVFS(mp);
158 error = devfs_allocv(dmp->dm_rootdir, mp, &vp, td);
159 if (error)
160 return (error);
161 vp->v_vflag |= VV_ROOT;
162 *vpp = vp;
163 return (0);
164}
165
166static int
167devfs_statfs(mp, sbp, td)
168 struct mount *mp;
169 struct statfs *sbp;
170 struct thread *td;
171{
172
173 sbp->f_flags = 0;
174 sbp->f_bsize = DEV_BSIZE;
175 sbp->f_iosize = DEV_BSIZE;
176 sbp->f_blocks = 2; /* 1K to keep df happy */
177 sbp->f_bfree = 0;
178 sbp->f_bavail = 0;
179 sbp->f_files = 0;
180 sbp->f_ffree = 0;
181 if (sbp != &mp->mnt_stat) {
182 sbp->f_type = mp->mnt_vfc->vfc_typenum;
183 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
184 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
185 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
186 }
187 return (0);
188}
189
190static struct vfsops devfs_vfsops = {
191 NULL,
192 vfs_stdstart,
193 devfs_unmount,
194 devfs_root,
195 vfs_stdquotactl,
196 devfs_statfs,
197 vfs_stdsync,
198 vfs_stdvget,
199 vfs_stdfhtovp,
200 vfs_stdcheckexp,
201 vfs_stdvptofh,
202 vfs_stdinit,
203 vfs_stduninit,
204 vfs_stdextattrctl,
205 devfs_nmount,
206};
207
208VFS_SET(devfs_vfsops, devfs, VFCF_SYNTHETIC);
209#endif
| 101#endif
102 fmp->dm_basedir = fmp->dm_rootdir;
103 devfs_rules_newmount(fmp, td);
104
105 error = devfs_root(mp, &rvp);
106 if (error) {
107 lockdestroy(&fmp->dm_lock);
108 FREE(fmp, M_DEVFS);
109 return (error);
110 }
111 VOP_UNLOCK(rvp, 0, td);
112
113 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
114 bcopy("devfs", mp->mnt_stat.f_mntfromname, sizeof("devfs"));
115 (void)devfs_statfs(mp, &mp->mnt_stat, td);
116
117 return (0);
118}
119
120static int
121devfs_unmount(mp, mntflags, td)
122 struct mount *mp;
123 int mntflags;
124 struct thread *td;
125{
126 int error;
127 int flags = 0;
128 struct devfs_mount *fmp;
129
130 fmp = VFSTODEVFS(mp);
131 if (mntflags & MNT_FORCE)
132 flags |= FORCECLOSE;
133 /* There is 1 extra root vnode reference from devfs_mount(). */
134 error = vflush(mp, 1, flags);
135 if (error)
136 return (error);
137 devfs_purge(fmp->dm_rootdir);
138 mp->mnt_data = 0;
139 lockdestroy(&fmp->dm_lock);
140 free(fmp->dm_dirent, M_DEVFS);
141 free(fmp, M_DEVFS);
142 return 0;
143}
144
145/* Return locked reference to root. */
146
147static int
148devfs_root(mp, vpp)
149 struct mount *mp;
150 struct vnode **vpp;
151{
152 int error;
153 struct thread *td;
154 struct vnode *vp;
155 struct devfs_mount *dmp;
156
157 td = curthread; /* XXX */
158 dmp = VFSTODEVFS(mp);
159 error = devfs_allocv(dmp->dm_rootdir, mp, &vp, td);
160 if (error)
161 return (error);
162 vp->v_vflag |= VV_ROOT;
163 *vpp = vp;
164 return (0);
165}
166
167static int
168devfs_statfs(mp, sbp, td)
169 struct mount *mp;
170 struct statfs *sbp;
171 struct thread *td;
172{
173
174 sbp->f_flags = 0;
175 sbp->f_bsize = DEV_BSIZE;
176 sbp->f_iosize = DEV_BSIZE;
177 sbp->f_blocks = 2; /* 1K to keep df happy */
178 sbp->f_bfree = 0;
179 sbp->f_bavail = 0;
180 sbp->f_files = 0;
181 sbp->f_ffree = 0;
182 if (sbp != &mp->mnt_stat) {
183 sbp->f_type = mp->mnt_vfc->vfc_typenum;
184 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
185 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
186 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
187 }
188 return (0);
189}
190
191static struct vfsops devfs_vfsops = {
192 NULL,
193 vfs_stdstart,
194 devfs_unmount,
195 devfs_root,
196 vfs_stdquotactl,
197 devfs_statfs,
198 vfs_stdsync,
199 vfs_stdvget,
200 vfs_stdfhtovp,
201 vfs_stdcheckexp,
202 vfs_stdvptofh,
203 vfs_stdinit,
204 vfs_stduninit,
205 vfs_stdextattrctl,
206 devfs_nmount,
207};
208
209VFS_SET(devfs_vfsops, devfs, VFCF_SYNTHETIC);
210#endif
|