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;
50 /* a list of pending async requests. Needed to support
52 struct pvfs_wait *wait_list;
54 /* the sharing violation timeout */
55 uint_t sharing_violation_delay;
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;
89 struct pvfs_file *next, *prev;
92 struct pvfs_filename *name;
94 /* we need to remember the session it was opened on,
95 as it is illegal to operate on someone elses fnum */
96 struct smbsrv_session *session;
98 /* we need to remember the client pid that
99 opened the file so SMBexit works */
102 /* a unique file key to be used for file locking */
103 DATA_BLOB locking_key;
105 /* we need this hook back to our parent for lock destruction */
106 struct pvfs_state *pvfs;
108 /* a list of pending locks - used for locking cancel operations */
109 struct pvfs_pending_lock *pending_list;
111 /* a count of active locks - used to avoid calling brl_close on
115 uint32_t create_options;
116 uint32_t share_access;
117 uint32_t access_mask;
119 /* yes, we need 2 independent positions ... */
120 uint64_t seek_offset;
123 BOOL have_opendb_entry;
127 struct pvfs_mangle_context {
128 uint8_t char_flags[256];
130 this determines how many characters are used from the original
131 filename in the 8.3 mangled name. A larger value leads to a weaker
132 hash and more collisions. The largest possible value is 6.
135 uint32_t mangle_modulus;
137 /* we will use a very simple direct mapped prefix cache. The big
138 advantage of this cache structure is speed and low memory usage
140 The cache is indexed by the low-order bits of the hash, and confirmed by
141 hashing the resulting cache entry to match the known hash
144 uint32_t *prefix_cache_hashes;
146 /* this is used to reverse the base 36 mapping */
147 unsigned char base_reverse[256];
152 /* flags to pvfs_resolve_name() */
153 #define PVFS_RESOLVE_NO_WILDCARD (1<<0)
154 #define PVFS_RESOLVE_STREAMS (1<<1)
156 /* flags in pvfs->flags */
157 #define PVFS_FLAG_CI_FILESYSTEM (1<<0) /* the filesystem is case insensitive */
158 #define PVFS_FLAG_MAP_ARCHIVE (1<<1)
159 #define PVFS_FLAG_MAP_SYSTEM (1<<2)
160 #define PVFS_FLAG_MAP_HIDDEN (1<<3)
161 #define PVFS_FLAG_READONLY (1<<4)
162 #define PVFS_FLAG_STRICT_SYNC (1<<5)
163 #define PVFS_FLAG_STRICT_LOCKING (1<<6)
164 #define PVFS_FLAG_XATTR_ENABLE (1<<7)
166 /* forward declare some anonymous structures */
169 /* types of notification for pvfs wait events */
170 enum pvfs_wait_notice {PVFS_WAIT_EVENT, PVFS_WAIT_TIMEOUT, PVFS_WAIT_CANCEL};
173 /* putting this prototype here avoids us having to expose this whole header in the
175 void *pvfs_wait_message(struct pvfs_state *pvfs,
176 struct smbsrv_request *req,
178 struct timeval end_time,
179 void (*fn)(void *, enum pvfs_wait_notice),
182 #endif /* _VFS_POSIX_H_ */