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/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 #include <sys/pipe.h> 46 #define _WANT_MOUNT 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 #include <nfs/nfsproto.h> 55 #include <nfsclient/nfs.h> 56 #include <nfsclient/nfsnode.h> 57 58 #include <assert.h> 59 #include <err.h> 60 #include <kvm.h> 61 #include <stddef.h> 62 #include <string.h> 63 64 #include <libprocstat.h> 65 #include "common_kvm.h" 66 67 int 68 kvm_read_all(kvm_t *kd, unsigned long addr, void *buf, size_t nbytes) 69 { 70 ssize_t error; 71 72 if (nbytes >= SSIZE_MAX) 73 return (0); 74 error = kvm_read(kd, addr, buf, nbytes); 75 return (error == (ssize_t)(nbytes)); 76 } 77 78 int 79 kdevtoname(kvm_t *kd, struct cdev *dev, char *buf) 80 { 81 struct cdev si; 82 83 assert(buf); 84 if (!kvm_read_all(kd, (unsigned long)dev, &si, sizeof(si))) 85 return (1); 86 strlcpy(buf, si.si_name, SPECNAMELEN + 1); 87 return (0); 88 } 89 90 int 91 ufs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn) 92 { 93 struct inode inode; 94 struct ufsmount um; 95 96 if (!kvm_read_all(kd, (unsigned long)VTOI(vp), &inode, sizeof(inode))) { 97 warnx("can't read inode at %p", (void *)VTOI(vp)); 98 return (1); 99 } 100 if (!kvm_read_all(kd, (unsigned long)inode.i_ump, &um, sizeof(um))) { 101 warnx("can't read ufsmount at %p", (void *)inode.i_ump); 102 return (1); 103 } 104 /* 105 * The st_dev from stat(2) is a dev_t. These kernel structures 106 * contain cdev pointers. We need to convert to dev_t to make 107 * comparisons 108 */ 109 vn->vn_fsid = dev2udev(kd, um.um_dev); 110 vn->vn_fileid = inode.i_number; 111 vn->vn_mode = (mode_t)inode.i_mode; 112 vn->vn_size = inode.i_size; 113 return (0); 114 } 115 116 int 117 devfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn) 118 { 119 struct devfs_dirent devfs_dirent; 120 struct mount mount; 121 122 if (!kvm_read_all(kd, (unsigned long)getvnodedata(vp), &devfs_dirent, 123 sizeof(devfs_dirent))) { 124 warnx("can't read devfs_dirent at %p", 125 (void *)vp->v_data); 126 return (1); 127 } 128 if (!kvm_read_all(kd, (unsigned long)getvnodemount(vp), &mount, 129 sizeof(mount))) { 130 warnx("can't read mount at %p", 131 (void *)getvnodemount(vp)); 132 return (1); 133 } 134 vn->vn_fsid = mount.mnt_stat.f_fsid.val[0]; 135 vn->vn_fileid = devfs_dirent.de_inode; 136 vn->vn_mode = (devfs_dirent.de_mode & ~S_IFMT) | S_IFCHR; 137 vn->vn_size = 0; 138 return (0); 139 } 140 141 int 142 nfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn) 143 { 144 struct nfsnode nfsnode; 145 mode_t mode; 146 147 if (!kvm_read_all(kd, (unsigned long)VTONFS(vp), &nfsnode, 148 sizeof(nfsnode))) { 149 warnx("can't read nfsnode at %p", 150 (void *)VTONFS(vp)); 151 return (1); 152 } 153 vn->vn_fsid = nfsnode.n_vattr.va_fsid; 154 vn->vn_fileid = nfsnode.n_vattr.va_fileid; 155 vn->vn_size = nfsnode.n_size; 156 mode = (mode_t)nfsnode.n_vattr.va_mode; 157 switch (vp->v_type) { 158 case VREG: 159 mode |= S_IFREG; 160 break; 161 case VDIR: 162 mode |= S_IFDIR; 163 break; 164 case VBLK: 165 mode |= S_IFBLK; 166 break; 167 case VCHR: 168 mode |= S_IFCHR; 169 break; 170 case VLNK: 171 mode |= S_IFLNK; 172 break; 173 case VSOCK: 174 mode |= S_IFSOCK; 175 break; 176 case VFIFO: 177 mode |= S_IFIFO; 178 break; 179 default: 180 break; 181 }; 182 vn->vn_mode = mode; 183 return (0); 184 } 185 186 /* 187 * Read the cdev structure in the kernel in order to work out the 188 * associated dev_t 189 */ 190 dev_t 191 dev2udev(kvm_t *kd, struct cdev *dev) 192 { 193 struct cdev_priv priv; 194 195 assert(kd); 196 if (kvm_read_all(kd, (unsigned long)cdev2priv(dev), &priv, 197 sizeof(priv))) { 198 return ((dev_t)priv.cdp_inode); 199 } else { 200 warnx("can't convert cdev *%p to a dev_t\n", dev); 201 return (-1); 202 } 203 } 204 205 void * 206 getvnodedata(struct vnode *vp) 207 { 208 return (vp->v_data); 209 } 210 211 struct mount * 212 getvnodemount(struct vnode *vp) 213 { 214 return (vp->v_mount); 215 } 216