1 /* $NetBSD: linux_statfs.h,v 1.1.6.2 2007/04/20 20:26:04 bouyer 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 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40 #ifndef _LINUX_STATFS_H
41 #define _LINUX_STATFS_H
42
43 static void bsd_to_linux_statfs __P((const struct statvfs *,
44 struct linux_statfs *));
45
46 /*
47 * Convert NetBSD statvfs structure to Linux statfs structure.
48 * Linux doesn't have f_flag, and we can't set f_frsize due
49 * to glibc statvfs() bug (see below).
50 */
51 static void
52 bsd_to_linux_statfs(bsp, lsp)
53 const struct statvfs *bsp;
54 struct linux_statfs *lsp;
55 {
56 int i;
57
58 for (i = 0; i < linux_fstypes_cnt; i++) {
59 if (strcmp(bsp->f_fstypename, linux_fstypes[i].bsd) == 0) {
60 lsp->l_ftype = linux_fstypes[i].linux;
61 break;
62 }
63 }
64
65 if (i == linux_fstypes_cnt) {
66 lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC;
67 }
68
69 /*
70 * The sizes are expressed in number of blocks. The block
71 * size used for the size is f_frsize for POSIX-compliant
72 * statvfs. Linux statfs uses f_bsize as the block size
73 * (f_frsize used to not be available in Linux struct statfs).
74 * However, glibc 2.3.3 statvfs() wrapper fails to adjust the block
75 * counts for different f_frsize if f_frsize is provided by the kernel.
76 * POSIX conforming apps thus get wrong size if f_frsize
77 * is different to f_bsize. Thus, we just pretend we don't
78 * support f_frsize.
79 */
80
81 lsp->l_fbsize = bsp->f_frsize;
82 lsp->l_ffrsize = 0; /* compat */
83 lsp->l_fblocks = bsp->f_blocks;
84 lsp->l_fbfree = bsp->f_bfree;
85 lsp->l_fbavail = bsp->f_bavail;
86 lsp->l_ffiles = bsp->f_files;
87 lsp->l_fffree = bsp->f_ffree;
88 /* Linux sets the fsid to 0..., we don't */
89 lsp->l_ffsid.val[0] = bsp->f_fsidx.__fsid_val[0];
90 lsp->l_ffsid.val[1] = bsp->f_fsidx.__fsid_val[1];
91 lsp->l_fnamelen = bsp->f_namemax;
92 (void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare));
93 }
94
95 #endif /* !_LINUX_STATFS_H */
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