1 /*-
2 * Copyright (c) 2009 Stanislav Sedov <stas@FreeBSD.org>
3 * Copyright (c) 1988, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include <sys/param.h>
39 #include <sys/user.h>
40 #include <sys/stat.h>
41 #include <sys/vnode.h>
42 #include <sys/conf.h>
43 #define _KERNEL
44 #include <sys/pipe.h>
45 #include <sys/mount.h>
46 #include <ufs/ufs/quota.h>
47 #include <ufs/ufs/inode.h>
48 #include <ufs/ufs/extattr.h>
49 #include <ufs/ufs/ufsmount.h>
50 #include <fs/devfs/devfs.h>
51 #include <fs/devfs/devfs_int.h>
52 #undef _KERNEL
53 #include <nfs/nfsproto.h>
54 #include <nfsclient/nfs.h>
55 #include <nfsclient/nfsnode.h>
56
57 #include <assert.h>
58 #include <err.h>
59 #include <kvm.h>
60 #include <stddef.h>
61 #include <string.h>
62
63 #include <libprocstat.h>
64 #include "common_kvm.h"
65
66 int
kvm_read_all(kvm_t * kd,unsigned long addr,void * buf,size_t nbytes)67 kvm_read_all(kvm_t *kd, unsigned long addr, void *buf, size_t nbytes)
68 {
69 ssize_t error;
70
71 if (nbytes >= SSIZE_MAX)
72 return (0);
73 error = kvm_read(kd, addr, buf, nbytes);
74 return (error == (ssize_t)(nbytes));
75 }
76
77 int
kdevtoname(kvm_t * kd,struct cdev * dev,char * buf)78 kdevtoname(kvm_t *kd, struct cdev *dev, char *buf)
79 {
80 struct cdev si;
81
82 assert(buf);
83 if (!kvm_read_all(kd, (unsigned long)dev, &si, sizeof(si)))
84 return (1);
85 strlcpy(buf, si.si_name, SPECNAMELEN + 1);
86 return (0);
87 }
88
89 int
ufs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)90 ufs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
91 {
92 struct inode inode;
93 struct ufsmount um;
94
95 if (!kvm_read_all(kd, (unsigned long)VTOI(vp), &inode, sizeof(inode))) {
96 warnx("can't read inode at %p", (void *)VTOI(vp));
97 return (1);
98 }
99 if (!kvm_read_all(kd, (unsigned long)inode.i_ump, &um, sizeof(um))) {
100 warnx("can't read ufsmount at %p", (void *)inode.i_ump);
101 return (1);
102 }
103 /*
104 * The st_dev from stat(2) is a dev_t. These kernel structures
105 * contain cdev pointers. We need to convert to dev_t to make
106 * comparisons
107 */
108 vn->vn_fsid = dev2udev(kd, um.um_dev);
109 vn->vn_fileid = inode.i_number;
110 vn->vn_mode = (mode_t)inode.i_mode;
111 vn->vn_size = inode.i_size;
112 return (0);
113 }
114
115 int
devfs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)116 devfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
117 {
118 struct devfs_dirent devfs_dirent;
119 struct mount mount;
120
121 if (!kvm_read_all(kd, (unsigned long)getvnodedata(vp), &devfs_dirent,
122 sizeof(devfs_dirent))) {
123 warnx("can't read devfs_dirent at %p",
124 (void *)vp->v_data);
125 return (1);
126 }
127 if (!kvm_read_all(kd, (unsigned long)getvnodemount(vp), &mount,
128 sizeof(mount))) {
129 warnx("can't read mount at %p",
130 (void *)getvnodemount(vp));
131 return (1);
132 }
133 vn->vn_fsid = mount.mnt_stat.f_fsid.val[0];
134 vn->vn_fileid = devfs_dirent.de_inode;
135 vn->vn_mode = (devfs_dirent.de_mode & ~S_IFMT) | S_IFCHR;
136 vn->vn_size = 0;
137 return (0);
138 }
139
140 int
nfs_filestat(kvm_t * kd,struct vnode * vp,struct vnstat * vn)141 nfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
142 {
143 struct nfsnode nfsnode;
144 mode_t mode;
145
146 if (!kvm_read_all(kd, (unsigned long)VTONFS(vp), &nfsnode,
147 sizeof(nfsnode))) {
148 warnx("can't read nfsnode at %p",
149 (void *)VTONFS(vp));
150 return (1);
151 }
152 vn->vn_fsid = nfsnode.n_vattr.va_fsid;
153 vn->vn_fileid = nfsnode.n_vattr.va_fileid;
154 vn->vn_size = nfsnode.n_size;
155 mode = (mode_t)nfsnode.n_vattr.va_mode;
156 switch (vp->v_type) {
157 case VREG:
158 mode |= S_IFREG;
159 break;
160 case VDIR:
161 mode |= S_IFDIR;
162 break;
163 case VBLK:
164 mode |= S_IFBLK;
165 break;
166 case VCHR:
167 mode |= S_IFCHR;
168 break;
169 case VLNK:
170 mode |= S_IFLNK;
171 break;
172 case VSOCK:
173 mode |= S_IFSOCK;
174 break;
175 case VFIFO:
176 mode |= S_IFIFO;
177 break;
178 default:
179 break;
180 };
181 vn->vn_mode = mode;
182 return (0);
183 }
184
185 /*
186 * Read the cdev structure in the kernel in order to work out the
187 * associated dev_t
188 */
189 dev_t
dev2udev(kvm_t * kd,struct cdev * dev)190 dev2udev(kvm_t *kd, struct cdev *dev)
191 {
192 struct cdev_priv priv;
193
194 assert(kd);
195 if (kvm_read_all(kd, (unsigned long)cdev2priv(dev), &priv,
196 sizeof(priv))) {
197 return ((dev_t)priv.cdp_inode);
198 } else {
199 warnx("can't convert cdev *%p to a dev_t\n", dev);
200 return (-1);
201 }
202 }
203
204 void *
getvnodedata(struct vnode * vp)205 getvnodedata(struct vnode *vp)
206 {
207 return (vp->v_data);
208 }
209
210 struct mount *
getvnodemount(struct vnode * vp)211 getvnodemount(struct vnode *vp)
212 {
213 return (vp->v_mount);
214 }
215