1 /* $NetBSD: compat_statfs.c,v 1.7 2013/10/04 21:07:37 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: compat_statfs.c,v 1.7 2013/10/04 21:07:37 christos Exp $"); 35 #endif /* LIBC_SCCS and not lint */ 36 37 #define __LIBC12_SOURCE__ 38 39 #include "namespace.h" 40 #include <sys/types.h> 41 #include <sys/param.h> 42 #include <sys/mount.h> 43 #include <compat/sys/mount.h> 44 #include <compat/include/fstypes.h> 45 #include <string.h> 46 #include <stdlib.h> 47 48 __warn_references(statfs, 49 "warning: reference to obsolete statfs(); use statvfs()") 50 51 __warn_references(fstatfs, 52 "warning: reference to obsolete fstatfs(); use fstatvfs()") 53 54 __warn_references(fhstatfs, 55 "warning: reference to obsolete fhstatfs(); use fhstatvfs()") 56 57 __warn_references(getfsstat, 58 "warning: reference to obsolete getfsstat(); use getvfsstat()") 59 60 __strong_alias(statfs, __compat_statfs) 61 __strong_alias(fstatfs, __compat_fstatfs) 62 __strong_alias(fhstatfs, __compat_fhstatfs) 63 __strong_alias(getfsstat, __compat_getfsstat) 64 65 /* 66 * Convert from a new statvfs to an old statfs structure. 67 */ 68 69 static void vfs2fs(struct statfs12 *, const struct statvfs *); 70 71 #define MOUNTNO_NONE 0 72 #define MOUNTNO_UFS 1 /* UNIX "Fast" Filesystem */ 73 #define MOUNTNO_NFS 2 /* Network Filesystem */ 74 #define MOUNTNO_MFS 3 /* Memory Filesystem */ 75 #define MOUNTNO_MSDOS 4 /* MSDOS Filesystem */ 76 #define MOUNTNO_CD9660 5 /* iso9660 cdrom */ 77 #define MOUNTNO_FDESC 6 /* /dev/fd filesystem */ 78 #define MOUNTNO_KERNFS 7 /* kernel variable filesystem */ 79 #define MOUNTNO_DEVFS 8 /* device node filesystem */ 80 #define MOUNTNO_AFS 9 /* AFS 3.x */ 81 static const struct { 82 const char *name; 83 const int value; 84 } nv[] = { 85 { MOUNT_UFS, MOUNTNO_UFS }, 86 { MOUNT_NFS, MOUNTNO_NFS }, 87 { MOUNT_MFS, MOUNTNO_MFS }, 88 { MOUNT_MSDOS, MOUNTNO_MSDOS }, 89 { MOUNT_CD9660, MOUNTNO_CD9660 }, 90 { MOUNT_FDESC, MOUNTNO_FDESC }, 91 { MOUNT_KERNFS, MOUNTNO_KERNFS }, 92 { MOUNT_AFS, MOUNTNO_AFS }, 93 }; 94 95 static void 96 vfs2fs(struct statfs12 *bfs, const struct statvfs *fs) 97 { 98 size_t i = 0; 99 bfs->f_type = 0; 100 bfs->f_oflags = (short)fs->f_flag; 101 102 for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++) { 103 if (strcmp(nv[i].name, fs->f_fstypename) == 0) { 104 bfs->f_type = nv[i].value; 105 break; 106 } 107 } 108 #define CLAMP(a) (long)(((a) & ~LONG_MAX) ? LONG_MAX : (a)) 109 bfs->f_bsize = CLAMP(fs->f_frsize); 110 bfs->f_iosize = CLAMP(fs->f_iosize); 111 bfs->f_blocks = CLAMP(fs->f_blocks); 112 bfs->f_bfree = CLAMP(fs->f_bfree); 113 if (fs->f_bfree > fs->f_bresvd) 114 bfs->f_bavail = CLAMP(fs->f_bfree - fs->f_bresvd); 115 else 116 bfs->f_bavail = -CLAMP(fs->f_bresvd - fs->f_bfree); 117 bfs->f_files = CLAMP(fs->f_files); 118 bfs->f_ffree = CLAMP(fs->f_ffree); 119 bfs->f_fsid = fs->f_fsidx; 120 bfs->f_owner = fs->f_owner; 121 bfs->f_flags = (long)fs->f_flag; 122 bfs->f_syncwrites = CLAMP(fs->f_syncwrites); 123 bfs->f_asyncwrites = CLAMP(fs->f_asyncwrites); 124 (void)strncpy(bfs->f_fstypename, fs->f_fstypename, 125 sizeof(bfs->f_fstypename)); 126 (void)strncpy(bfs->f_mntonname, fs->f_mntonname, 127 sizeof(bfs->f_mntonname)); 128 (void)strncpy(bfs->f_mntfromname, fs->f_mntfromname, 129 sizeof(bfs->f_mntfromname)); 130 } 131 132 int 133 __compat_statfs(const char *file, struct statfs12 *ost) 134 { 135 struct statvfs nst; 136 int ret; 137 138 if ((ret = statvfs(file, &nst)) == -1) 139 return ret; 140 vfs2fs(ost, &nst); 141 return ret; 142 } 143 144 int 145 __compat_fstatfs(int f, struct statfs12 *ost) 146 { 147 struct statvfs nst; 148 int ret; 149 150 if ((ret = fstatvfs(f, &nst)) == -1) 151 return ret; 152 vfs2fs(ost, &nst); 153 return ret; 154 } 155 156 int __fhstatvfs140(const void *fhp, size_t fh_size, struct statvfs *buf, 157 int flags); 158 159 int 160 __compat_fhstatfs(const struct compat_30_fhandle *fh, struct statfs12 *ost) 161 { 162 struct statvfs nst; 163 int ret; 164 165 if ((ret = __fhstatvfs140(fh, FHANDLE30_SIZE, &nst, ST_WAIT)) == -1) 166 return ret; 167 vfs2fs(ost, &nst); 168 return ret; 169 } 170 171 int 172 __compat_getfsstat(struct statfs12 *ost, long size, int flags) 173 { 174 struct statvfs *nst; 175 int ret, i; 176 size_t bsize = (size_t)(size / sizeof(*ost)) * sizeof(*nst); 177 178 if (ost != NULL) { 179 if ((nst = malloc(bsize)) == NULL) 180 return -1; 181 } else 182 nst = NULL; 183 184 if ((ret = getvfsstat(nst, bsize, flags)) == -1) 185 goto done; 186 if (nst) 187 for (i = 0; i < ret; i++) 188 vfs2fs(&ost[i], &nst[i]); 189 done: 190 if (nst) 191 free(nst); 192 return ret; 193 } 194