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 #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 #include <sys/pipe.h> 44 #define _WANT_MOUNT 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 #include <nfs/nfsproto.h> 53 #include <nfsclient/nfs.h> 54 #include <nfsclient/nfsnode.h> 55 56 #include <assert.h> 57 #include <err.h> 58 #include <kvm.h> 59 #include <stddef.h> 60 #include <string.h> 61 62 #include <libprocstat.h> 63 #include "common_kvm.h" 64 65 int 66 kvm_read_all(kvm_t *kd, unsigned long addr, void *buf, size_t nbytes) 67 { 68 ssize_t error; 69 70 if (nbytes >= SSIZE_MAX) 71 return (0); 72 error = kvm_read(kd, addr, buf, nbytes); 73 return (error == (ssize_t)(nbytes)); 74 } 75 76 int 77 kdevtoname(kvm_t *kd, struct cdev *dev, char *buf) 78 { 79 struct cdev si; 80 81 assert(buf); 82 if (!kvm_read_all(kd, (unsigned long)dev, &si, sizeof(si))) 83 return (1); 84 strlcpy(buf, si.si_name, SPECNAMELEN + 1); 85 return (0); 86 } 87 88 int 89 ufs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn) 90 { 91 struct inode inode; 92 struct ufsmount um; 93 94 if (!kvm_read_all(kd, (unsigned long)VTOI(vp), &inode, sizeof(inode))) { 95 warnx("can't read inode at %p", (void *)VTOI(vp)); 96 return (1); 97 } 98 if (!kvm_read_all(kd, (unsigned long)inode.i_ump, &um, sizeof(um))) { 99 warnx("can't read ufsmount at %p", (void *)inode.i_ump); 100 return (1); 101 } 102 /* 103 * The st_dev from stat(2) is a dev_t. These kernel structures 104 * contain cdev pointers. We need to convert to dev_t to make 105 * comparisons 106 */ 107 vn->vn_fsid = dev2udev(kd, um.um_dev); 108 vn->vn_fileid = inode.i_number; 109 vn->vn_mode = (mode_t)inode.i_mode; 110 vn->vn_size = inode.i_size; 111 return (0); 112 } 113 114 int 115 devfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn) 116 { 117 struct devfs_dirent devfs_dirent; 118 struct mount mount; 119 120 if (!kvm_read_all(kd, (unsigned long)getvnodedata(vp), &devfs_dirent, 121 sizeof(devfs_dirent))) { 122 warnx("can't read devfs_dirent at %p", 123 (void *)vp->v_data); 124 return (1); 125 } 126 if (!kvm_read_all(kd, (unsigned long)getvnodemount(vp), &mount, 127 sizeof(mount))) { 128 warnx("can't read mount at %p", 129 (void *)getvnodemount(vp)); 130 return (1); 131 } 132 vn->vn_fsid = mount.mnt_stat.f_fsid.val[0]; 133 vn->vn_fileid = devfs_dirent.de_inode; 134 vn->vn_mode = (devfs_dirent.de_mode & ~S_IFMT) | S_IFCHR; 135 vn->vn_size = 0; 136 return (0); 137 } 138 139 int 140 nfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn) 141 { 142 struct nfsnode nfsnode; 143 mode_t mode; 144 145 if (!kvm_read_all(kd, (unsigned long)VTONFS(vp), &nfsnode, 146 sizeof(nfsnode))) { 147 warnx("can't read nfsnode at %p", 148 (void *)VTONFS(vp)); 149 return (1); 150 } 151 vn->vn_fsid = nfsnode.n_vattr.va_fsid; 152 vn->vn_fileid = nfsnode.n_vattr.va_fileid; 153 vn->vn_size = nfsnode.n_size; 154 mode = (mode_t)nfsnode.n_vattr.va_mode; 155 switch (vp->v_type) { 156 case VREG: 157 mode |= S_IFREG; 158 break; 159 case VDIR: 160 mode |= S_IFDIR; 161 break; 162 case VBLK: 163 mode |= S_IFBLK; 164 break; 165 case VCHR: 166 mode |= S_IFCHR; 167 break; 168 case VLNK: 169 mode |= S_IFLNK; 170 break; 171 case VSOCK: 172 mode |= S_IFSOCK; 173 break; 174 case VFIFO: 175 mode |= S_IFIFO; 176 break; 177 default: 178 break; 179 }; 180 vn->vn_mode = mode; 181 return (0); 182 } 183 184 /* 185 * Read the cdev structure in the kernel in order to work out the 186 * associated dev_t 187 */ 188 dev_t 189 dev2udev(kvm_t *kd, struct cdev *dev) 190 { 191 struct cdev_priv priv; 192 193 assert(kd); 194 if (kvm_read_all(kd, (unsigned long)cdev2priv(dev), &priv, 195 sizeof(priv))) { 196 return ((dev_t)priv.cdp_inode); 197 } else { 198 warnx("can't convert cdev *%p to a dev_t\n", dev); 199 return (-1); 200 } 201 } 202 203 void * 204 getvnodedata(struct vnode *vp) 205 { 206 return (vp->v_data); 207 } 208 209 struct mount * 210 getvnodemount(struct vnode *vp) 211 { 212 return (vp->v_mount); 213 } 214