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 "system/filesys.h"
27 #include "smb_server/smb_server.h"
29 /* We use libblkid out of e2fsprogs to identify UUID of a volume */
31 #include <blkid/blkid.h>
39 /* this is the private structure for the posix vfs backend. It is used
40 to hold per-connection (per tree connect) state information */
42 struct smbsrv_tcon *tcon;
43 const char *base_directory;
45 const char *share_name;
48 struct pvfs_file *open_files;
50 struct pvfs_mangle_context *mangle_ctx;
52 struct brl_context *brl_context;
53 struct odb_context *odb_context;
54 struct sidmap_context *sidmap;
56 /* an id tree mapping open search ID to a pvfs_search_state structure */
57 struct idr_context *idtree_search;
59 /* an id tree mapping open file handle -> struct pvfs_file */
60 struct idr_context *idtree_fnum;
62 /* a list of pending async requests. Needed to support
64 struct pvfs_wait *wait_list;
66 /* the sharing violation timeout */
67 uint_t sharing_violation_delay;
69 /* filesystem attributes (see FS_ATTR_*) */
72 /* if posix:eadb is set, then this gets setup */
73 struct tdb_wrap *ea_db;
75 /* the allocation size rounding */
76 uint32_t alloc_size_rounding;
78 /* used to accelerate acl mapping */
80 const struct dom_sid *creator_owner;
81 const struct dom_sid *creator_group;
85 blkid_cache_wrap_t *blkid_cache;
89 /* this is the basic information needed about a file from the filesystem */
90 struct pvfs_dos_fileinfo {
104 this is the structure returned by pvfs_resolve_name(). It holds the posix details of
105 a filename passed by the client to any function
107 struct pvfs_filename {
108 const char *original_name;
110 const char *stream_name; /* does not include :$DATA suffix */
111 uint32_t stream_id; /* this uses a hash, so is probabilistic */
113 BOOL exists; /* true if the base filename exists */
114 BOOL stream_exists; /* true if the stream exists */
116 struct pvfs_dos_fileinfo dos;
120 /* open file handle state - encapsulates the posix fd
122 Note that this is separated from the pvfs_file structure in order
123 to cope with the openx DENY_DOS semantics where a 2nd DENY_DOS open
124 on the same connection gets the same low level filesystem handle,
125 rather than a new handle
127 struct pvfs_file_handle {
130 struct pvfs_filename *name;
132 /* a unique file key to be used for open file locking */
133 DATA_BLOB odb_locking_key;
135 /* a unique file key to be used for byte range locking */
136 DATA_BLOB brl_locking_key;
138 uint32_t create_options;
140 /* this is set by the mode_information level. What does it do? */
143 /* yes, we need 2 independent positions ... */
144 uint64_t seek_offset;
147 BOOL have_opendb_entry;
149 /* we need this hook back to our parent for lock destruction */
150 struct pvfs_state *pvfs;
152 /* have we set a sticky write time that we should remove on close */
153 BOOL sticky_write_time;
156 /* open file state */
158 struct pvfs_file *next, *prev;
159 struct pvfs_file_handle *handle;
162 struct pvfs_state *pvfs;
164 uint32_t impersonation;
165 uint32_t share_access;
166 uint32_t access_mask;
168 /* we need to remember the session it was opened on,
169 as it is illegal to operate on someone elses fnum */
170 struct smbsrv_session *session;
172 /* we need to remember the client pid that
173 opened the file so SMBexit works */
176 /* a list of pending locks - used for locking cancel operations */
177 struct pvfs_pending_lock *pending_list;
179 /* a count of active locks - used to avoid calling brl_close on
185 /* flags to pvfs_resolve_name() */
186 #define PVFS_RESOLVE_WILDCARD (1<<0)
187 #define PVFS_RESOLVE_STREAMS (1<<1)
189 /* flags in pvfs->flags */
190 #define PVFS_FLAG_CI_FILESYSTEM (1<<0) /* the filesystem is case insensitive */
191 #define PVFS_FLAG_MAP_ARCHIVE (1<<1)
192 #define PVFS_FLAG_MAP_SYSTEM (1<<2)
193 #define PVFS_FLAG_MAP_HIDDEN (1<<3)
194 #define PVFS_FLAG_READONLY (1<<4)
195 #define PVFS_FLAG_STRICT_SYNC (1<<5)
196 #define PVFS_FLAG_STRICT_LOCKING (1<<6)
197 #define PVFS_FLAG_XATTR_ENABLE (1<<7)
198 #define PVFS_FLAG_FAKE_OPLOCKS (1<<8)
200 /* forward declare some anonymous structures */
203 /* types of notification for pvfs wait events */
204 enum pvfs_wait_notice {PVFS_WAIT_EVENT, PVFS_WAIT_TIMEOUT, PVFS_WAIT_CANCEL};
207 /* putting this prototype here avoids us having to expose this whole header in the
209 void *pvfs_wait_message(struct pvfs_state *pvfs,
210 struct smbsrv_request *req,
212 struct timeval end_time,
213 void (*fn)(void *, enum pvfs_wait_notice),
216 #endif /* _VFS_POSIX_H_ */