1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2009 Stanislav Sedov <stas@FreeBSD.org>
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/param.h>
38 #include <sys/user.h>
39 #include <sys/stat.h>
40 #include <sys/vnode.h>
41 #include <sys/conf.h>
42 #include <sys/pipe.h>
43 #define _WANT_MOUNT
44 #include <sys/mount.h>
45 #include <ufs/ufs/quota.h>
46 #include <ufs/ufs/inode.h>
47 #include <ufs/ufs/extattr.h>
48 #include <ufs/ufs/ufsmount.h>
49 #include <fs/devfs/devfs.h>
50 #include <fs/devfs/devfs_int.h>
51 #include <nfs/nfsproto.h>
52 #include <nfsclient/nfs.h>
53 #include <nfsclient/nfsnode.h>
54
55 #include <assert.h>
56 #include <err.h>
57 #include <kvm.h>
58 #include <stddef.h>
59 #include <string.h>
60
61 #include <libprocstat.h>
62 #include "common_kvm.h"
63
64 int
kvm_read_all(kvm_t * kd,unsigned long addr,void * buf,size_t nbytes)65 kvm_read_all(kvm_t *kd, unsigned long addr, void *buf, size_t nbytes)
66 {
67 ssize_t error;
68
69 if (nbytes >= SSIZE_MAX)
70 return (0);
71 error = kvm_read(kd, addr, buf, nbytes);
72 return (error == (ssize_t)(nbytes));
73 }
74
75 int
kdevtoname(kvm_t * kd,struct cdev * dev,char * buf)76 kdevtoname(kvm_t *kd, struct cdev *dev, char *buf)
77 {
78 struct cdev si;
79
80 assert(buf);
81 if (!kvm_read_all(kd, (unsigned long)dev, &si, sizeof(si)))
82 return (1);
83 strlcpy(buf, si.si_name, SPECNAMELEN + 1);
84 return (0);
85 }
86
87 int
ufs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)88 ufs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
89 {
90 struct inode inode;
91 struct ufsmount um;
92
93 if (!kvm_read_all(kd, (unsigned long)VTOI(vp), &inode, sizeof(inode))) {
94 warnx("can't read inode at %p", (void *)VTOI(vp));
95 return (1);
96 }
97 if (!kvm_read_all(kd, (unsigned long)inode.i_ump, &um, sizeof(um))) {
98 warnx("can't read ufsmount at %p", (void *)inode.i_ump);
99 return (1);
100 }
101 /*
102 * The st_dev from stat(2) is a dev_t. These kernel structures
103 * contain cdev pointers. We need to convert to dev_t to make
104 * comparisons
105 */
106 vn->vn_fsid = dev2udev(kd, um.um_dev);
107 vn->vn_fileid = inode.i_number;
108 vn->vn_mode = (mode_t)inode.i_mode;
109 vn->vn_size = inode.i_size;
110 return (0);
111 }
112
113 int
devfs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)114 devfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
115 {
116 struct devfs_dirent devfs_dirent;
117 struct mount mount;
118
119 if (!kvm_read_all(kd, (unsigned long)getvnodedata(vp), &devfs_dirent,
120 sizeof(devfs_dirent))) {
121 warnx("can't read devfs_dirent at %p",
122 (void *)vp->v_data);
123 return (1);
124 }
125 if (!kvm_read_all(kd, (unsigned long)getvnodemount(vp), &mount,
126 sizeof(mount))) {
127 warnx("can't read mount at %p",
128 (void *)getvnodemount(vp));
129 return (1);
130 }
131 vn->vn_fsid = mount.mnt_stat.f_fsid.val[0];
132 vn->vn_fileid = devfs_dirent.de_inode;
133 vn->vn_mode = (devfs_dirent.de_mode & ~S_IFMT) | S_IFCHR;
134 vn->vn_size = 0;
135 return (0);
136 }
137
138 int
nfs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)139 nfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
140 {
141 struct nfsnode nfsnode;
142 mode_t mode;
143
144 if (!kvm_read_all(kd, (unsigned long)VTONFS(vp), &nfsnode,
145 sizeof(nfsnode))) {
146 warnx("can't read nfsnode at %p",
147 (void *)VTONFS(vp));
148 return (1);
149 }
150 vn->vn_fsid = nfsnode.n_vattr.va_fsid;
151 vn->vn_fileid = nfsnode.n_vattr.va_fileid;
152 vn->vn_size = nfsnode.n_size;
153 mode = (mode_t)nfsnode.n_vattr.va_mode;
154 switch (vp->v_type) {
155 case VREG:
156 mode |= S_IFREG;
157 break;
158 case VDIR:
159 mode |= S_IFDIR;
160 break;
161 case VBLK:
162 mode |= S_IFBLK;
163 break;
164 case VCHR:
165 mode |= S_IFCHR;
166 break;
167 case VLNK:
168 mode |= S_IFLNK;
169 break;
170 case VSOCK:
171 mode |= S_IFSOCK;
172 break;
173 case VFIFO:
174 mode |= S_IFIFO;
175 break;
176 default:
177 break;
178 };
179 vn->vn_mode = mode;
180 return (0);
181 }
182
183 /*
184 * Read the cdev structure in the kernel in order to work out the
185 * associated dev_t
186 */
187 dev_t
dev2udev(kvm_t * kd,struct cdev * dev)188 dev2udev(kvm_t *kd, struct cdev *dev)
189 {
190 struct cdev_priv priv;
191
192 assert(kd);
193 if (kvm_read_all(kd, (unsigned long)cdev2priv(dev), &priv,
194 sizeof(priv))) {
195 return ((dev_t)priv.cdp_inode);
196 } else {
197 warnx("can't convert cdev *%p to a dev_t\n", dev);
198 return (-1);
199 }
200 }
201
202 void *
getvnodedata(struct vnode * vp)203 getvnodedata(struct vnode *vp)
204 {
205 return (vp->v_data);
206 }
207
208 struct mount *
getvnodemount(struct vnode * vp)209 getvnodemount(struct vnode *vp)
210 {
211 return (vp->v_mount);
212 }
213