1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2001 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 #include <sys/inttypes.h> 38 #include <sys/types.h> 39 #include <sys/t_lock.h> 40 #include <sys/param.h> 41 #include <sys/errno.h> 42 #include <sys/fstyp.h> 43 #include <sys/systm.h> 44 #include <sys/vfs.h> 45 #include <sys/statfs.h> 46 #include <sys/vnode.h> 47 #include <sys/file.h> 48 #include <sys/cmn_err.h> 49 #include <sys/debug.h> 50 #include <sys/pathname.h> 51 52 #include <vm/page.h> 53 54 #if defined(_SYSCALL32_IMPL) || defined(_ILP32) 55 56 /* 57 * statfs(2) and fstatfs(2) have been replaced by statvfs(2) and 58 * fstatvfs(2) and will be removed from the system in a near-future 59 * release. 60 * 61 * Supported here purely for 32-bit compatibility. 62 */ 63 64 static int cstatfs(struct vfs *, struct statfs32 *, int); 65 66 int 67 statfs32(char *fname, struct statfs32 *sbp, int32_t len, int32_t fstyp) 68 { 69 vnode_t *vp; 70 int error; 71 72 lookup: 73 if (error = lookupname(fname, UIO_USERSPACE, FOLLOW, NULLVPP, &vp)) { 74 if (error == ESTALE) 75 goto lookup; 76 return (set_errno(error)); 77 } 78 if (fstyp != 0) 79 error = EINVAL; 80 else 81 error = cstatfs(vp->v_vfsp, sbp, len); 82 VN_RELE(vp); 83 if (error) { 84 if (error == ESTALE) 85 goto lookup; 86 return (set_errno(error)); 87 } 88 return (0); 89 } 90 91 int 92 fstatfs32(int32_t fdes, struct statfs32 *sbp, int32_t len, int32_t fstyp) 93 { 94 struct file *fp; 95 int error; 96 97 if (fstyp != 0) 98 return (set_errno(EINVAL)); 99 if ((fp = getf(fdes)) == NULL) 100 return (set_errno(EBADF)); 101 error = cstatfs(fp->f_vnode->v_vfsp, sbp, len); 102 releasef(fdes); 103 if (error) 104 return (set_errno(error)); 105 return (0); 106 } 107 108 /* 109 * Common routine for fstatfs and statfs. 110 */ 111 static int 112 cstatfs(struct vfs *vfsp, struct statfs32 *sbp, int len) 113 { 114 struct statfs32 sfs; 115 struct statvfs64 svfs; 116 int error, i; 117 char *cp, *cp2; 118 struct vfssw *vswp; 119 120 if (len < 0 || len > sizeof (struct statfs)) 121 return (EINVAL); 122 if (error = VFS_STATVFS(vfsp, &svfs)) 123 return (error); 124 125 if (svfs.f_blocks > UINT32_MAX || svfs.f_bfree > UINT32_MAX || 126 svfs.f_files > UINT32_MAX || svfs.f_ffree > UINT32_MAX) 127 return (EOVERFLOW); 128 /* 129 * Map statvfs fields into the old statfs structure. 130 */ 131 bzero(&sfs, sizeof (sfs)); 132 sfs.f_bsize = svfs.f_bsize; 133 sfs.f_frsize = (svfs.f_frsize == svfs.f_bsize) ? 0 : svfs.f_frsize; 134 sfs.f_blocks = svfs.f_blocks * (svfs.f_frsize / 512); 135 sfs.f_bfree = svfs.f_bfree * (svfs.f_frsize / 512); 136 sfs.f_files = svfs.f_files; 137 sfs.f_ffree = svfs.f_ffree; 138 139 cp = svfs.f_fstr; 140 cp2 = sfs.f_fname; 141 i = 0; 142 while (i++ < sizeof (sfs.f_fname)) 143 if (*cp != '\0') 144 *cp2++ = *cp++; 145 else 146 *cp2++ = '\0'; 147 while (*cp != '\0' && 148 i++ < (sizeof (svfs.f_fstr) - sizeof (sfs.f_fpack))) 149 cp++; 150 (void) strncpy(sfs.f_fpack, cp + 1, sizeof (sfs.f_fpack)); 151 if ((vswp = vfs_getvfssw(svfs.f_basetype)) == NULL) 152 sfs.f_fstyp = 0; 153 else { 154 sfs.f_fstyp = vswp - vfssw; 155 vfs_unrefvfssw(vswp); 156 } 157 158 if (copyout(&sfs, sbp, len)) 159 return (EFAULT); 160 161 return (0); 162 } 163 164 #endif /* _SYSCALL32_IMPL || _ILP32 */ 165