1 /* $NetBSD: linux_statfs.h,v 1.3 2008/04/28 20:23:44 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe 9 * of the Numerical Aerospace Simulation Facility, NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _LINUX_STATFS_H 34 #define _LINUX_STATFS_H 35 36 static void bsd_to_linux_statfs(const struct statvfs *, 37 struct linux_statfs *); 38 39 /* 40 * Convert NetBSD statvfs structure to Linux statfs structure. 41 * Linux doesn't have f_flag, and we can't set f_frsize due 42 * to glibc statvfs() bug (see below). 43 */ 44 static void 45 bsd_to_linux_statfs(bsp, lsp) 46 const struct statvfs *bsp; 47 struct linux_statfs *lsp; 48 { 49 int i; 50 51 for (i = 0; i < linux_fstypes_cnt; i++) { 52 if (strcmp(bsp->f_fstypename, linux_fstypes[i].bsd) == 0) { 53 lsp->l_ftype = linux_fstypes[i].linux; 54 break; 55 } 56 } 57 58 if (i == linux_fstypes_cnt) { 59 lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; 60 } 61 62 /* 63 * The sizes are expressed in number of blocks. The block 64 * size used for the size is f_frsize for POSIX-compliant 65 * statvfs. Linux statfs uses f_bsize as the block size 66 * (f_frsize used to not be available in Linux struct statfs). 67 * However, glibc 2.3.3 statvfs() wrapper fails to adjust the block 68 * counts for different f_frsize if f_frsize is provided by the kernel. 69 * POSIX conforming apps thus get wrong size if f_frsize 70 * is different to f_bsize. Thus, we just pretend we don't 71 * support f_frsize. 72 */ 73 74 lsp->l_fbsize = bsp->f_frsize; 75 lsp->l_ffrsize = 0; /* compat */ 76 lsp->l_fblocks = bsp->f_blocks; 77 lsp->l_fbfree = bsp->f_bfree; 78 lsp->l_fbavail = bsp->f_bavail; 79 lsp->l_ffiles = bsp->f_files; 80 lsp->l_fffree = bsp->f_ffree; 81 /* Linux sets the fsid to 0..., we don't */ 82 lsp->l_ffsid.val[0] = bsp->f_fsidx.__fsid_val[0]; 83 lsp->l_ffsid.val[1] = bsp->f_fsidx.__fsid_val[1]; 84 lsp->l_fnamelen = bsp->f_namemax; 85 (void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare)); 86 } 87 88 #endif /* !_LINUX_STATFS_H */ 89