compat_statfs.c revision 1.3.18.1
1 /* $NetBSD: compat_statfs.c,v 1.3.18.1 2008/05/18 12:30:15 yamt 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 1.3.18.1 2008/05/18 12:30:15 yamt 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 /* 61 * Convert from a new statvfs to an old statfs structure. 62 */ 63 64 static void vfs2fs(struct statfs12 *, const struct statvfs *); 65 66 #define MOUNTNO_NONE 0 67 #define MOUNTNO_UFS 1 /* UNIX "Fast" Filesystem */ 68 #define MOUNTNO_NFS 2 /* Network Filesystem */ 69 #define MOUNTNO_MFS 3 /* Memory Filesystem */ 70 #define MOUNTNO_MSDOS 4 /* MSDOS Filesystem */ 71 #define MOUNTNO_CD9660 5 /* iso9660 cdrom */ 72 #define MOUNTNO_FDESC 6 /* /dev/fd filesystem */ 73 #define MOUNTNO_KERNFS 7 /* kernel variable filesystem */ 74 #define MOUNTNO_DEVFS 8 /* device node filesystem */ 75 #define MOUNTNO_AFS 9 /* AFS 3.x */ 76 static const struct { 77 const char *name; 78 const int value; 79 } nv[] = { 80 { MOUNT_UFS, MOUNTNO_UFS }, 81 { MOUNT_NFS, MOUNTNO_NFS }, 82 { MOUNT_MFS, MOUNTNO_MFS }, 83 { MOUNT_MSDOS, MOUNTNO_MSDOS }, 84 { MOUNT_CD9660, MOUNTNO_CD9660 }, 85 { MOUNT_FDESC, MOUNTNO_FDESC }, 86 { MOUNT_KERNFS, MOUNTNO_KERNFS }, 87 { MOUNT_AFS, MOUNTNO_AFS }, 88 }; 89 90 static void 91 vfs2fs(struct statfs12 *bfs, const struct statvfs *fs) 92 { 93 int i = 0; 94 bfs->f_type = 0; 95 bfs->f_oflags = (short)fs->f_flag; 96 97 for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++) { 98 if (strcmp(nv[i].name, fs->f_fstypename) == 0) { 99 bfs->f_type = nv[i].value; 100 break; 101 } 102 } 103 #define CLAMP(a) (long)(((a) & ~LONG_MAX) ? LONG_MAX : (a)) 104 bfs->f_bsize = CLAMP(fs->f_frsize); 105 bfs->f_iosize = CLAMP(fs->f_iosize); 106 bfs->f_blocks = CLAMP(fs->f_blocks); 107 bfs->f_bfree = CLAMP(fs->f_bfree); 108 if (fs->f_bfree > fs->f_bresvd) 109 bfs->f_bavail = CLAMP(fs->f_bfree - fs->f_bresvd); 110 else 111 bfs->f_bavail = -CLAMP(fs->f_bresvd - fs->f_bfree); 112 bfs->f_files = CLAMP(fs->f_files); 113 bfs->f_ffree = CLAMP(fs->f_ffree); 114 bfs->f_fsid = fs->f_fsidx; 115 bfs->f_owner = fs->f_owner; 116 bfs->f_flags = (long)fs->f_flag; 117 bfs->f_syncwrites = CLAMP(fs->f_syncwrites); 118 bfs->f_asyncwrites = CLAMP(fs->f_asyncwrites); 119 (void)strncpy(bfs->f_fstypename, fs->f_fstypename, 120 sizeof(bfs->f_fstypename)); 121 (void)strncpy(bfs->f_mntonname, fs->f_mntonname, 122 sizeof(bfs->f_mntonname)); 123 (void)strncpy(bfs->f_mntfromname, fs->f_mntfromname, 124 sizeof(bfs->f_mntfromname)); 125 } 126 127 int 128 statfs(const char *file, struct statfs12 *ost) 129 { 130 struct statvfs nst; 131 int ret; 132 133 if ((ret = statvfs(file, &nst)) == -1) 134 return ret; 135 vfs2fs(ost, &nst); 136 return ret; 137 } 138 139 int 140 fstatfs(int f, struct statfs12 *ost) 141 { 142 struct statvfs nst; 143 int ret; 144 145 if ((ret = fstatvfs(f, &nst)) == -1) 146 return ret; 147 vfs2fs(ost, &nst); 148 return ret; 149 } 150 151 int __fhstatvfs140(const void *fhp, size_t fh_size, struct statvfs *buf, 152 int flags); 153 154 int 155 fhstatfs(const struct compat_30_fhandle *fh, struct statfs12 *ost) 156 { 157 struct statvfs nst; 158 int ret; 159 160 if ((ret = __fhstatvfs140(fh, FHANDLE30_SIZE, &nst, ST_WAIT)) == -1) 161 return ret; 162 vfs2fs(ost, &nst); 163 return ret; 164 } 165 166 int 167 getfsstat(struct statfs12 *ost, long size, int flags) 168 { 169 struct statvfs *nst; 170 int ret, i; 171 size_t bsize = (size_t)(size / sizeof(*ost)) * sizeof(*nst); 172 173 if (ost != NULL) { 174 if ((nst = malloc(bsize)) == NULL) 175 return -1; 176 } else 177 nst = NULL; 178 179 if ((ret = getvfsstat(nst, bsize, flags)) == -1) 180 goto done; 181 if (nst) 182 for (i = 0; i < ret; i++) 183 vfs2fs(&ost[i], &nst[i]); 184 done: 185 if (nst) 186 free(nst); 187 return ret; 188 } 189
Indexes created Thu Oct 02 01:09:59 GMT 2025