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 #include <sys/inttypes.h> 35 #include <sys/types.h> 36 #include <sys/t_lock.h> 37 #include <sys/param.h> 38 #include <sys/errno.h> 39 #include <sys/fstyp.h> 40 #include <sys/systm.h> 41 #include <sys/vfs.h> 42 #include <sys/statfs.h> 43 #include <sys/vnode.h> 44 #include <sys/file.h> 45 #include <sys/cmn_err.h> 46 #include <sys/debug.h> 47 #include <sys/pathname.h> 48 49 #include <vm/page.h> 50 #include <fs/fs_subr.h> 51 52 #if defined(_SYSCALL32_IMPL) || defined(_ILP32) 53 54 /* 55 * statfs(2) and fstatfs(2) have been replaced by statvfs(2) and 56 * fstatvfs(2) and will be removed from the system in a near-future 57 * release. 58 * 59 * Supported here purely for 32-bit compatibility. 60 */ 61 62 static int cstatfs(struct vfs *, struct statfs32 *, int); 63 64 int 65 statfs32(char *fname, struct statfs32 *sbp, int32_t len, int32_t fstyp) 66 { 67 vnode_t *vp; 68 int error; 69 int estale_retry = 0; 70 71 lookup: 72 if (error = lookupname(fname, UIO_USERSPACE, FOLLOW, NULLVPP, &vp)) { 73 if ((error == ESTALE) && fs_need_estale_retry(estale_retry++)) 74 goto lookup; 75 return (set_errno(error)); 76 } 77 if (fstyp != 0) 78 error = EINVAL; 79 else 80 error = cstatfs(vp->v_vfsp, sbp, len); 81 VN_RELE(vp); 82 if (error) { 83 if ((error == ESTALE) && fs_need_estale_retry(estale_retry++)) 84 goto lookup; 85 return (set_errno(error)); 86 } 87 return (0); 88 } 89 90 int 91 fstatfs32(int32_t fdes, struct statfs32 *sbp, int32_t len, int32_t fstyp) 92 { 93 struct file *fp; 94 int error; 95 96 if (fstyp != 0) 97 return (set_errno(EINVAL)); 98 if ((fp = getf(fdes)) == NULL) 99 return (set_errno(EBADF)); 100 error = cstatfs(fp->f_vnode->v_vfsp, sbp, len); 101 releasef(fdes); 102 if (error) 103 return (set_errno(error)); 104 return (0); 105 } 106 107 /* 108 * Common routine for fstatfs and statfs. 109 */ 110 static int 111 cstatfs(struct vfs *vfsp, struct statfs32 *sbp, int len) 112 { 113 struct statfs32 sfs; 114 struct statvfs64 svfs; 115 int error, i; 116 char *cp, *cp2; 117 struct vfssw *vswp; 118 119 if (len < 0 || len > sizeof (struct statfs)) 120 return (EINVAL); 121 if (error = VFS_STATVFS(vfsp, &svfs)) 122 return (error); 123 124 if (svfs.f_blocks > UINT32_MAX || svfs.f_bfree > UINT32_MAX || 125 svfs.f_files > UINT32_MAX || svfs.f_ffree > UINT32_MAX) 126 return (EOVERFLOW); 127 /* 128 * Map statvfs fields into the old statfs structure. 129 */ 130 bzero(&sfs, sizeof (sfs)); 131 sfs.f_bsize = svfs.f_bsize; 132 sfs.f_frsize = (svfs.f_frsize == svfs.f_bsize) ? 0 : svfs.f_frsize; 133 sfs.f_blocks = svfs.f_blocks * (svfs.f_frsize / 512); 134 sfs.f_bfree = svfs.f_bfree * (svfs.f_frsize / 512); 135 sfs.f_files = svfs.f_files; 136 sfs.f_ffree = svfs.f_ffree; 137 138 cp = svfs.f_fstr; 139 cp2 = sfs.f_fname; 140 i = 0; 141 while (i++ < sizeof (sfs.f_fname)) 142 if (*cp != '\0') 143 *cp2++ = *cp++; 144 else 145 *cp2++ = '\0'; 146 while (*cp != '\0' && 147 i++ < (sizeof (svfs.f_fstr) - sizeof (sfs.f_fpack))) 148 cp++; 149 (void) strncpy(sfs.f_fpack, cp + 1, sizeof (sfs.f_fpack)); 150 if ((vswp = vfs_getvfssw(svfs.f_basetype)) == NULL) 151 sfs.f_fstyp = 0; 152 else { 153 sfs.f_fstyp = vswp - vfssw; 154 vfs_unrefvfssw(vswp); 155 } 156 157 if (copyout(&sfs, sbp, len)) 158 return (EFAULT); 159 160 return (0); 161 } 162 163 #endif /* _SYSCALL32_IMPL || _ILP32 */ 164