1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2009 Stanislav Sedov <[email protected]>
5 * Copyright (c) 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. 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
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 #include <sys/param.h>
41 #include <sys/user.h>
42 #include <sys/stat.h>
43 #include <sys/vnode.h>
44 #include <sys/conf.h>
45 #define _KERNEL
46 #include <sys/pipe.h>
47 #include <sys/mount.h>
48 #include <ufs/ufs/quota.h>
49 #include <ufs/ufs/inode.h>
50 #include <ufs/ufs/extattr.h>
51 #include <ufs/ufs/ufsmount.h>
52 #include <fs/devfs/devfs.h>
53 #include <fs/devfs/devfs_int.h>
54 #undef _KERNEL
55 #include <nfs/nfsproto.h>
56 #include <nfsclient/nfs.h>
57 #include <nfsclient/nfsnode.h>
58
59 #include <assert.h>
60 #include <err.h>
61 #include <kvm.h>
62 #include <stddef.h>
63 #include <string.h>
64
65 #include <libprocstat.h>
66 #include "common_kvm.h"
67
68 int
kvm_read_all(kvm_t * kd,unsigned long addr,void * buf,size_t nbytes)69 kvm_read_all(kvm_t *kd, unsigned long addr, void *buf, size_t nbytes)
70 {
71 ssize_t error;
72
73 if (nbytes >= SSIZE_MAX)
74 return (0);
75 error = kvm_read(kd, addr, buf, nbytes);
76 return (error == (ssize_t)(nbytes));
77 }
78
79 int
kdevtoname(kvm_t * kd,struct cdev * dev,char * buf)80 kdevtoname(kvm_t *kd, struct cdev *dev, char *buf)
81 {
82 struct cdev si;
83
84 assert(buf);
85 if (!kvm_read_all(kd, (unsigned long)dev, &si, sizeof(si)))
86 return (1);
87 strlcpy(buf, si.si_name, SPECNAMELEN + 1);
88 return (0);
89 }
90
91 int
ufs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)92 ufs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
93 {
94 struct inode inode;
95 struct ufsmount um;
96
97 if (!kvm_read_all(kd, (unsigned long)VTOI(vp), &inode, sizeof(inode))) {
98 warnx("can't read inode at %p", (void *)VTOI(vp));
99 return (1);
100 }
101 if (!kvm_read_all(kd, (unsigned long)inode.i_ump, &um, sizeof(um))) {
102 warnx("can't read ufsmount at %p", (void *)inode.i_ump);
103 return (1);
104 }
105 /*
106 * The st_dev from stat(2) is a dev_t. These kernel structures
107 * contain cdev pointers. We need to convert to dev_t to make
108 * comparisons
109 */
110 vn->vn_fsid = dev2udev(kd, um.um_dev);
111 vn->vn_fileid = inode.i_number;
112 vn->vn_mode = (mode_t)inode.i_mode;
113 vn->vn_size = inode.i_size;
114 return (0);
115 }
116
117 int
devfs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)118 devfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
119 {
120 struct devfs_dirent devfs_dirent;
121 struct mount mount;
122
123 if (!kvm_read_all(kd, (unsigned long)getvnodedata(vp), &devfs_dirent,
124 sizeof(devfs_dirent))) {
125 warnx("can't read devfs_dirent at %p",
126 (void *)vp->v_data);
127 return (1);
128 }
129 if (!kvm_read_all(kd, (unsigned long)getvnodemount(vp), &mount,
130 sizeof(mount))) {
131 warnx("can't read mount at %p",
132 (void *)getvnodemount(vp));
133 return (1);
134 }
135 vn->vn_fsid = mount.mnt_stat.f_fsid.val[0];
136 vn->vn_fileid = devfs_dirent.de_inode;
137 vn->vn_mode = (devfs_dirent.de_mode & ~S_IFMT) | S_IFCHR;
138 vn->vn_size = 0;
139 return (0);
140 }
141
142 int
nfs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)143 nfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
144 {
145 struct nfsnode nfsnode;
146 mode_t mode;
147
148 if (!kvm_read_all(kd, (unsigned long)VTONFS(vp), &nfsnode,
149 sizeof(nfsnode))) {
150 warnx("can't read nfsnode at %p",
151 (void *)VTONFS(vp));
152 return (1);
153 }
154 vn->vn_fsid = nfsnode.n_vattr.va_fsid;
155 vn->vn_fileid = nfsnode.n_vattr.va_fileid;
156 vn->vn_size = nfsnode.n_size;
157 mode = (mode_t)nfsnode.n_vattr.va_mode;
158 switch (vp->v_type) {
159 case VREG:
160 mode |= S_IFREG;
161 break;
162 case VDIR:
163 mode |= S_IFDIR;
164 break;
165 case VBLK:
166 mode |= S_IFBLK;
167 break;
168 case VCHR:
169 mode |= S_IFCHR;
170 break;
171 case VLNK:
172 mode |= S_IFLNK;
173 break;
174 case VSOCK:
175 mode |= S_IFSOCK;
176 break;
177 case VFIFO:
178 mode |= S_IFIFO;
179 break;
180 default:
181 break;
182 };
183 vn->vn_mode = mode;
184 return (0);
185 }
186
187 /*
188 * Read the cdev structure in the kernel in order to work out the
189 * associated dev_t
190 */
191 dev_t
dev2udev(kvm_t * kd,struct cdev * dev)192 dev2udev(kvm_t *kd, struct cdev *dev)
193 {
194 struct cdev_priv priv;
195
196 assert(kd);
197 if (kvm_read_all(kd, (unsigned long)cdev2priv(dev), &priv,
198 sizeof(priv))) {
199 return ((dev_t)priv.cdp_inode);
200 } else {
201 warnx("can't convert cdev *%p to a dev_t\n", dev);
202 return (-1);
203 }
204 }
205
206 void *
getvnodedata(struct vnode * vp)207 getvnodedata(struct vnode *vp)
208 {
209 return (vp->v_data);
210 }
211
212 struct mount *
getvnodemount(struct vnode * vp)213 getvnodemount(struct vnode *vp)
214 {
215 return (vp->v_mount);
216 }
217