2 Unix SMB/CIFS implementation.
4 POSIX NTVFS backend - structure definitions
6 Copyright (C) Andrew Tridgell 2004
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 /* this is the private structure for the posix vfs backend. It is used
27 to hold per-connection (per tree connect) state information */
29 struct smbsrv_tcon *tcon;
30 const char *base_directory;
32 const char *share_name;
36 /* a linked list of open searches */
37 struct pvfs_search_state *open_searches;
39 /* search handles are returned to the clients so they
40 can continue searches */
41 uint16_t next_search_handle;
43 /* count of active searches */
44 uint_t num_active_searches;
46 /* during trans2 search continuations we need to use
47 the initial search attributes */
48 uint16_t search_attrib;
51 struct pvfs_file *open_files;
53 struct pvfs_mangle_context *mangle_ctx;
57 /* this is the basic information needed about a file from the filesystem */
58 struct pvfs_dos_fileinfo {
71 this is the structure returned by pvfs_resolve_name(). It holds the posix details of
72 a filename passed by the client to any function
74 struct pvfs_filename {
75 const char *original_name;
77 const char *stream_name;
81 struct pvfs_dos_fileinfo dos;
85 /* this holds a list of file names for a search. We deliberately do
86 not hold the file stat information here to minimise the memory
87 overhead of idle searches */
90 const char *unix_path;
94 /* the state of a search started with pvfs_search_first() */
95 struct pvfs_search_state {
96 struct pvfs_search_state *next, *prev;
99 uint16_t search_attrib;
100 struct pvfs_dir *dir;
103 /* open file state - this is a temporary implementation
104 to allow some tests to work */
106 struct pvfs_file *next, *prev;
109 struct pvfs_filename *name;
111 /* we need to remember the session it was opened on,
112 as it is illegal to operate on someone elses fnum */
113 struct smbsrv_session *session;
115 /* we need to remember the client pid that
116 opened the file so SMBexit works */
120 struct pvfs_mangle_context {
121 uint8_t char_flags[256];
123 this determines how many characters are used from the original
124 filename in the 8.3 mangled name. A larger value leads to a weaker
125 hash and more collisions. The largest possible value is 6.
128 uint32_t mangle_modulus;
130 /* we will use a very simple direct mapped prefix cache. The big
131 advantage of this cache structure is speed and low memory usage
133 The cache is indexed by the low-order bits of the hash, and confirmed by
134 hashing the resulting cache entry to match the known hash
137 uint32_t *prefix_cache_hashes;
139 /* this is used to reverse the base 36 mapping */
140 unsigned char base_reverse[256];
145 /* flags to pvfs_resolve_name() */
146 #define PVFS_RESOLVE_NO_WILDCARD (1<<0)
147 #define PVFS_RESOLVE_STREAMS (1<<1)
149 /* flags in pvfs->flags */
150 #define PVFS_FLAG_CI_FILESYSTEM (1<<0) /* the filesystem is case insensitive */
151 #define PVFS_FLAG_MAP_ARCHIVE (1<<1)
152 #define PVFS_FLAG_MAP_SYSTEM (1<<2)
153 #define PVFS_FLAG_MAP_HIDDEN (1<<3)
154 #define PVFS_FLAG_READONLY (1<<4)
155 #define PVFS_FLAG_STRICT_SYNC (1<<5)
157 #endif /* _VFS_POSIX_H_ */