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 #include "smb_server/smb_server.h"
28 /* this is the private structure for the posix vfs backend. It is used
29 to hold per-connection (per tree connect) state information */
31 struct smbsrv_tcon *tcon;
32 const char *base_directory;
34 const char *share_name;
37 struct pvfs_file *open_files;
39 struct pvfs_mangle_context *mangle_ctx;
41 struct brl_context *brl_context;
42 struct odb_context *odb_context;
44 /* an id tree mapping open search ID to a pvfs_search_state structure */
45 struct idr_context *idtree_search;
47 /* an id tree mapping open file handle -> struct pvfs_file */
48 struct idr_context *idtree_fnum;
52 /* this is the basic information needed about a file from the filesystem */
53 struct pvfs_dos_fileinfo {
66 this is the structure returned by pvfs_resolve_name(). It holds the posix details of
67 a filename passed by the client to any function
69 struct pvfs_filename {
70 const char *original_name;
72 const char *stream_name;
76 struct pvfs_dos_fileinfo dos;
82 struct pvfs_file *next, *prev;
85 struct pvfs_filename *name;
87 /* we need to remember the session it was opened on,
88 as it is illegal to operate on someone elses fnum */
89 struct smbsrv_session *session;
91 /* we need to remember the client pid that
92 opened the file so SMBexit works */
95 /* a unique file key to be used for file locking */
96 DATA_BLOB locking_key;
98 /* we need this hook back to our parent for lock destruction */
99 struct pvfs_state *pvfs;
101 /* a list of pending locks - used for locking cancel operations */
102 struct pvfs_pending_lock *pending_list;
104 /* a count of active locks - used to avoid calling brl_close on
108 uint32_t create_options;
109 uint32_t share_access;
110 uint32_t access_mask;
112 /* yes, we need 2 independent positions ... */
113 uint64_t seek_offset;
118 struct pvfs_mangle_context {
119 uint8_t char_flags[256];
121 this determines how many characters are used from the original
122 filename in the 8.3 mangled name. A larger value leads to a weaker
123 hash and more collisions. The largest possible value is 6.
126 uint32_t mangle_modulus;
128 /* we will use a very simple direct mapped prefix cache. The big
129 advantage of this cache structure is speed and low memory usage
131 The cache is indexed by the low-order bits of the hash, and confirmed by
132 hashing the resulting cache entry to match the known hash
135 uint32_t *prefix_cache_hashes;
137 /* this is used to reverse the base 36 mapping */
138 unsigned char base_reverse[256];
143 /* flags to pvfs_resolve_name() */
144 #define PVFS_RESOLVE_NO_WILDCARD (1<<0)
145 #define PVFS_RESOLVE_STREAMS (1<<1)
147 /* flags in pvfs->flags */
148 #define PVFS_FLAG_CI_FILESYSTEM (1<<0) /* the filesystem is case insensitive */
149 #define PVFS_FLAG_MAP_ARCHIVE (1<<1)
150 #define PVFS_FLAG_MAP_SYSTEM (1<<2)
151 #define PVFS_FLAG_MAP_HIDDEN (1<<3)
152 #define PVFS_FLAG_READONLY (1<<4)
153 #define PVFS_FLAG_STRICT_SYNC (1<<5)
154 #define PVFS_FLAG_STRICT_LOCKING (1<<6)
156 /* forward declare some anonymous structures */
159 #endif /* _VFS_POSIX_H_ */