1/*
2 * param.h - Parameter values for ntfs-3g
3 *
4 * Copyright (c) 2009-2010 Jean-Pierre Andre
5 *
6 * This program/include file is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as published
8 * by the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program/include file is distributed in the hope that it will be
12 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program (in the main directory of the NTFS-3G
18 * distribution in the file COPYING); if not, write to the Free Software
19 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20 */
21
22#ifndef _NTFS_PARAM_H
23#define _NTFS_PARAM_H
24
25#define CACHE_INODE_SIZE 32	/* inode cache, zero or >= 3 and not too big */
26#define CACHE_NIDATA_SIZE 64	/* idata cache, zero or >= 3 and not too big */
27#define CACHE_LOOKUP_SIZE 64	/* lookup cache, zero or >= 3 and not too big */
28#define CACHE_SECURID_SIZE 16    /* securid cache, zero or >= 3 and not too big */
29#define CACHE_LEGACY_SIZE 8    /* legacy cache size, zero or >= 3 and not too big */
30
31#define FORCE_FORMAT_v1x 0	/* Insert security data as in NTFS v1.x */
32#define OWNERFROMACL 1		/* Get the owner from ACL (not Windows owner) */
33
34		/* default security sub-authorities */
35enum {
36	DEFSECAUTH1 = -1153374643, /* 3141592653 */
37	DEFSECAUTH2 = 589793238,
38	DEFSECAUTH3 = 462843383,
39	DEFSECBASE = 10000
40};
41
42/*
43 *		Parameters for formatting
44 */
45
46		/* Up to Windows 10, the cluster size was limited to 64K */
47#define NTFS_MAX_CLUSTER_SIZE 2097152 /* Windows 10 Creators allows 2MB */
48
49/*
50 *		Parameters for compression
51 */
52
53	/* default option for compression */
54#define DEFAULT_COMPRESSION 1
55	/* (log2 of) number of clusters in a compression block for new files */
56#define STANDARD_COMPRESSION_UNIT 4
57	/* maximum cluster size for allowing compression for new files */
58#define MAX_COMPRESSION_CLUSTER_SIZE 4096
59
60/*
61 *		Parameters for default options
62 */
63
64#define DEFAULT_DMTIME 60 /* default 1mn for delay_mtime */
65
66/*
67 *		Use of big write buffers
68 *
69 *	With small volumes, the cluster allocator may fail to allocate
70 *	enough clusters when the volume is nearly full. At most a run
71 *	can be allocated per bitmap chunk. So, there is a danger when the
72 *	number of chunks (capacity/(32768*clsiz)) is less than the number
73 *	of clusters in the biggest write buffer (131072/clsiz). Hence
74 *	a safe minimal capacity is 4GB
75 */
76
77#define SAFE_CAPACITY_FOR_BIG_WRITES 0x100000000LL
78
79/*
80 *		Parameters for runlists
81 */
82
83	/* only update the final extent of a runlist when appending data */
84#define PARTIAL_RUNLIST_UPDATING 1
85
86/*
87 *		Parameters for upper-case table
88 */
89
90	/* Create upper-case tables as defined by Windows 6.1 (Win7) */
91#define UPCASE_MAJOR 6
92#define UPCASE_MINOR 1
93
94/*
95 *		Parameters for user and xattr mappings
96 */
97
98#define XATTRMAPPINGFILE ".NTFS-3G/XattrMapping" /* default mapping file */
99
100/*
101 *		Parameters for path canonicalization
102 */
103
104#define MAPPERNAMELTH 256
105
106/*
107 *		Permission checking modes for high level and low level
108 *
109 *	The choices for high and low lowel are independent, they have
110 *	no effect on the library
111 *
112 *	Stick to the recommended values unless you understand the consequences
113 *	on protection and performances. Use of cacheing is good for
114 *	performances, but bad on security with internal fuse or external
115 *	fuse older than 2.8
116 *
117 *	On Linux, cacheing is discouraged for the high level interface
118 *	in order to get proper support of hard links. As a consequence,
119 *	having access control in the file system leads to fewer requests
120 *	to the file system and fewer context switches.
121 *
122 *	Irrespective of the selected mode, cacheing is always used
123 *	in read-only mounts
124 *
125 *	Possible values for high level :
126 *		1 : no cache, kernel control (recommended)
127 *		4 : no cache, file system control
128 *		6 : kernel/fuse cache, file system control (OpenIndiana only)
129 *		7 : no cache, kernel control for ACLs
130 *
131 *	Possible values for low level :
132 *		2 : no cache, kernel control
133 *		3 : use kernel/fuse cache, kernel control (recommended)
134 *		5 : no cache, file system control
135 *		6 : kernel/fuse cache, file system control (OpenIndiana only)
136 *		8 : no cache, kernel control for ACLs
137 *		9 : kernel/fuse cache, kernel control for ACLs (target)
138 *
139 *	Use of options 7, 8 and 9 requires a fuse module upgrade
140 *	When Posix ACLs are selected in the configure options, a value
141 *	of 6 is added in the mount report.
142 */
143
144#define TIMEOUT_RO 600 /* Attribute time out for read-only mounts */
145#if defined(__sun) && defined(__SVR4)
146/*
147 *	Access control by kernel is not implemented on OpenIndiana,
148 *	however care is taken of cacheing hard-linked files.
149 */
150#define HPERMSCONFIG 6
151#define LPERMSCONFIG 6
152#else /* defined(__sun) && defined(__SVR4) */
153/*
154 *	Cacheing by kernel is buggy on Linux when access control is done
155 *	by the file system, and also when using hard-linked files on
156 *	the fuse high level interface.
157 *	Also ACL checks by recent kernels do not prove satisfactory.
158 */
159#define HPERMSCONFIG 1
160#define LPERMSCONFIG 3
161#endif /* defined(__sun) && defined(__SVR4) */
162
163#endif /* defined _NTFS_PARAM_H */
164