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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * Portions of this source code were derived from Berkeley 4.3 BSD 31 * under license from the Regents of the University of California. 32 */ 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #include <sys/inttypes.h> 37 #include <sys/types.h> 38 #include <sys/t_lock.h> 39 #include <sys/param.h> 40 #include <sys/errno.h> 41 #include <sys/fstyp.h> 42 #include <sys/systm.h> 43 #include <sys/vfs.h> 44 #include <sys/statfs.h> 45 #include <sys/vnode.h> 46 #include <sys/file.h> 47 #include <sys/cmn_err.h> 48 #include <sys/debug.h> 49 #include <sys/pathname.h> 50 51 #include <vm/page.h> 52 #include <fs/fs_subr.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 53 54 #if defined(_SYSCALL32_IMPL) || defined(_ILP32) 55 56 /* 57 * statfs(2) and fstatfs(2) have been replaced by statvfs(2) and 58 * fstatvfs(2) and will be removed from the system in a near-future 59 * release. 60 * 61 * Supported here purely for 32-bit compatibility. 62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 int estale_retry = 0; 72 73 lookup: 74 if (error = lookupname(fname, UIO_USERSPACE, FOLLOW, NULLVPP, &vp)) { 75 if ((error == ESTALE) && fs_need_estale_retry(estale_retry++)) 76 goto lookup; 77 return (set_errno(error)); 78 } 79 if (fstyp != 0) 80 error = EINVAL; 81 else 82 error = cstatfs(vp->v_vfsp, sbp, len); 83 VN_RELE(vp); 84 if (error) { 85 if ((error == ESTALE) && fs_need_estale_retry(estale_retry++)) 86 goto lookup; 87 return (set_errno(error)); 88 } 89 return (0); 90 } 91 92 int 93 fstatfs32(int32_t fdes, struct statfs32 *sbp, int32_t len, int32_t fstyp) 94 { 95 struct file *fp; 96 int error; 97 98 if (fstyp != 0) 99 return (set_errno(EINVAL)); 100 if ((fp = getf(fdes)) == NULL) 101 return (set_errno(EBADF)); 102 error = cstatfs(fp->f_vnode->v_vfsp, sbp, len); 103 releasef(fdes); 104 if (error) 105 return (set_errno(error)); 106 return (0); 107 } 108 109 /* 110 * Common routine for fstatfs and statfs. 111 */ 112 static int 113 cstatfs(struct vfs *vfsp, struct statfs32 *sbp, int len) 114 { 115 struct statfs32 sfs; 116 struct statvfs64 svfs; 117 int error, i; 118 char *cp, *cp2; 119 struct vfssw *vswp; 120 121 if (len < 0 || len > sizeof (struct statfs)) 122 return (EINVAL); 123 if (error = VFS_STATVFS(vfsp, &svfs)) 124 return (error); 125 126 if (svfs.f_blocks > UINT32_MAX || svfs.f_bfree > UINT32_MAX || 127 svfs.f_files > UINT32_MAX || svfs.f_ffree > UINT32_MAX) 128 return (EOVERFLOW); 129 /* 130 * Map statvfs fields into the old statfs structure. 131 */ 132 bzero(&sfs, sizeof (sfs)); 133 sfs.f_bsize = svfs.f_bsize; 134 sfs.f_frsize = (svfs.f_frsize == svfs.f_bsize) ? 0 : svfs.f_frsize; 135 sfs.f_blocks = svfs.f_blocks * (svfs.f_frsize / 512); 136 sfs.f_bfree = svfs.f_bfree * (svfs.f_frsize / 512); 137 sfs.f_files = svfs.f_files; 138 sfs.f_ffree = svfs.f_ffree; 139 140 cp = svfs.f_fstr; 141 cp2 = sfs.f_fname; 142 i = 0; 143 while (i++ < sizeof (sfs.f_fname)) 144 if (*cp != '\0') 145 *cp2++ = *cp++; 146 else 147 *cp2++ = '\0'; 148 while (*cp != '\0' && 149 i++ < (sizeof (svfs.f_fstr) - sizeof (sfs.f_fpack))) 150 cp++; 151 (void) strncpy(sfs.f_fpack, cp + 1, sizeof (sfs.f_fpack)); 152 if ((vswp = vfs_getvfssw(svfs.f_basetype)) == NULL) 153 sfs.f_fstyp = 0; 154 else { 155 sfs.f_fstyp = vswp - vfssw; 156 vfs_unrefvfssw(vswp); 157 } 158 159 if (copyout(&sfs, sbp, len)) 160 return (EFAULT); 161 162 return (0); 163 } 164 165 #endif /* _SYSCALL32_IMPL || _ILP32 */ 166