/* $NetBSD: linux_statfs.h,v 1.6.42.1 2019/09/13 06:25:25 martin Exp $ */ /*- * Copyright (c) 1995, 1998, 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe * of the Numerical Aerospace Simulation Facility, NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _LINUX_STATFS_H #define _LINUX_STATFS_H static void __unused bsd_to_linux_statfs(const struct statvfs *, struct linux_statfs *); static void __unused bsd_to_linux_statfs64(const struct statvfs *, struct linux_statfs64 *); /* * Convert NetBSD statvfs structure to Linux statfs structure. * Linux doesn't have f_flag, and we can't set f_frsize due * to glibc statvfs() bug (see below). */ static void __unused bsd_to_linux_statfs(const struct statvfs *bsp, struct linux_statfs *lsp) { int i; memset(lsp, 0, sizeof(*lsp)); for (i = 0; i < linux_fstypes_cnt; i++) { if (strcmp(bsp->f_fstypename, linux_fstypes[i].mty_bsd) == 0) { lsp->l_ftype = linux_fstypes[i].mty_linux; break; } } if (i == linux_fstypes_cnt) { lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; } /* * The sizes are expressed in number of blocks. The block * size used for the size is f_frsize for POSIX-compliant * statvfs. Linux statfs uses f_bsize as the block size * (f_frsize used to not be available in Linux struct statfs). * However, glibc 2.3.3 statvfs() wrapper fails to adjust the block * counts for different f_frsize if f_frsize is provided by the kernel. * POSIX conforming apps thus get wrong size if f_frsize * is different to f_bsize. Thus, we just pretend we don't * support f_frsize. */ lsp->l_fbsize = bsp->f_frsize; lsp->l_ffrsize = 0; /* compat */ lsp->l_fblocks = bsp->f_blocks; lsp->l_fbfree = bsp->f_bfree; lsp->l_fbavail = bsp->f_bavail; lsp->l_ffiles = bsp->f_files; lsp->l_fffree = bsp->f_ffree; /* Linux sets the fsid to 0..., we don't */ lsp->l_ffsid.val[0] = bsp->f_fsidx.__fsid_val[0]; lsp->l_ffsid.val[1] = bsp->f_fsidx.__fsid_val[1]; lsp->l_fnamelen = bsp->f_namemax; } /* * Convert NetBSD statvfs structure to Linux statfs64 structure. * See comments in bsd_to_linux_statfs() for further background. * We can safely pass correct bsize and frsize here, since Linux glibc * statvfs() doesn't use statfs64(). */ static void __unused bsd_to_linux_statfs64(const struct statvfs *bsp, struct linux_statfs64 *lsp) { int i, div; memset(lsp, 0, sizeof(*lsp)); for (i = 0; i < linux_fstypes_cnt; i++) { if (strcmp(bsp->f_fstypename, linux_fstypes[i].mty_bsd) == 0) { lsp->l_ftype = linux_fstypes[i].mty_linux; break; } } if (i == linux_fstypes_cnt) { lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; } div = bsp->f_frsize ? (bsp->f_bsize / bsp->f_frsize) : 1; if (div == 0) div = 1; lsp->l_fbsize = bsp->f_bsize; lsp->l_ffrsize = bsp->f_frsize; lsp->l_fblocks = bsp->f_blocks / div; lsp->l_fbfree = bsp->f_bfree / div; lsp->l_fbavail = bsp->f_bavail / div; lsp->l_ffiles = bsp->f_files; lsp->l_fffree = bsp->f_ffree / div; /* Linux sets the fsid to 0..., we don't */ lsp->l_ffsid.val[0] = bsp->f_fsidx.__fsid_val[0]; lsp->l_ffsid.val[1] = bsp->f_fsidx.__fsid_val[1]; lsp->l_fnamelen = bsp->f_namemax; } #endif /* !_LINUX_STATFS_H */