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;
59 /* this is the basic information needed about a file from the filesystem */
60 struct pvfs_dos_fileinfo {
73 this is the structure returned by pvfs_resolve_name(). It holds the posix details of
74 a filename passed by the client to any function
76 struct pvfs_filename {
77 const char *original_name;
79 const char *stream_name;
83 struct pvfs_dos_fileinfo dos;
87 /* this holds a list of file names for a search. We deliberately do
88 not hold the file stat information here to minimise the memory
89 overhead of idle searches */
92 const char *unix_path;
96 /* the state of a search started with pvfs_search_first() */
97 struct pvfs_search_state {
98 struct pvfs_search_state *next, *prev;
100 uint_t current_index;
101 uint16_t search_attrib;
102 struct pvfs_dir *dir;
105 /* open file state - this is a temporary implementation
106 to allow some tests to work */
108 struct pvfs_file *next, *prev;
111 struct pvfs_filename *name;
113 /* we need to remember the session it was opened on,
114 as it is illegal to operate on someone elses fnum */
115 struct smbsrv_session *session;
117 /* we need to remember the client pid that
118 opened the file so SMBexit works */
121 /* a unique file key to be used for file locking */
122 DATA_BLOB locking_key;
124 /* we need this hook back to our parent for lock destruction */
125 struct pvfs_state *pvfs;
127 /* a list of pending locks - used for locking cancel operations */
128 struct pvfs_pending_lock *pending_list;
132 struct pvfs_mangle_context {
133 uint8_t char_flags[256];
135 this determines how many characters are used from the original
136 filename in the 8.3 mangled name. A larger value leads to a weaker
137 hash and more collisions. The largest possible value is 6.
140 uint32_t mangle_modulus;
142 /* we will use a very simple direct mapped prefix cache. The big
143 advantage of this cache structure is speed and low memory usage
145 The cache is indexed by the low-order bits of the hash, and confirmed by
146 hashing the resulting cache entry to match the known hash
149 uint32_t *prefix_cache_hashes;
151 /* this is used to reverse the base 36 mapping */
152 unsigned char base_reverse[256];
157 /* flags to pvfs_resolve_name() */
158 #define PVFS_RESOLVE_NO_WILDCARD (1<<0)
159 #define PVFS_RESOLVE_STREAMS (1<<1)
161 /* flags in pvfs->flags */
162 #define PVFS_FLAG_CI_FILESYSTEM (1<<0) /* the filesystem is case insensitive */
163 #define PVFS_FLAG_MAP_ARCHIVE (1<<1)
164 #define PVFS_FLAG_MAP_SYSTEM (1<<2)
165 #define PVFS_FLAG_MAP_HIDDEN (1<<3)
166 #define PVFS_FLAG_READONLY (1<<4)
167 #define PVFS_FLAG_STRICT_SYNC (1<<5)
168 #define PVFS_FLAG_STRICT_LOCKING (1<<6)
170 #endif /* _VFS_POSIX_H_ */