2 Unix SMB/CIFS implementation.
3 Manage connections_struct structures
4 Copyright (C) Andrew Tridgell 1998
5 Copyright (C) Alexander Bokovoy 2002
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 /* set these to define the limits of the server. NOTE These are on a
25 per-client basis. Thus any one machine can't connect to more than
26 MAX_CONNECTIONS services, but any number of machines may connect at
28 #define MAX_CONNECTIONS 128
30 static connection_struct
*Connections
;
32 /* number of open connections */
33 static struct bitmap
*bmap
;
36 /****************************************************************************
37 init the conn structures
38 ****************************************************************************/
41 bmap
= bitmap_allocate(MAX_CONNECTIONS
);
44 /****************************************************************************
45 return the number of open connections
46 ****************************************************************************/
47 int conn_num_open(void)
53 /****************************************************************************
54 check if a snum is in use
55 ****************************************************************************/
56 BOOL
conn_snum_used(int snum
)
58 connection_struct
*conn
;
59 for (conn
=Connections
;conn
;conn
=conn
->next
) {
60 if (conn
->service
== snum
) {
68 /****************************************************************************
69 find a conn given a cnum
70 ****************************************************************************/
71 connection_struct
*conn_find(unsigned cnum
)
74 connection_struct
*conn
;
76 for (conn
=Connections
;conn
;conn
=conn
->next
,count
++) {
77 if (conn
->cnum
== cnum
) {
79 DLIST_PROMOTE(Connections
, conn
);
89 /****************************************************************************
90 find first available connection slot, starting from a random position.
91 The randomisation stops problems with the server dieing and clients
92 thinking the server is still available.
93 ****************************************************************************/
94 connection_struct
*conn_new(void)
97 connection_struct
*conn
;
100 i
= bitmap_find(bmap
, 1);
103 DEBUG(1,("ERROR! Out of connection structures\n"));
107 if ((mem_ctx
=talloc_init("connection_struct"))==NULL
) {
108 DEBUG(0,("talloc_init(connection_struct) failed!\n"));
112 if ((conn
=(connection_struct
*)talloc_zero(mem_ctx
, sizeof(*conn
)))==NULL
) {
113 DEBUG(0,("talloc_zero() failed!\n"));
116 conn
->mem_ctx
= mem_ctx
;
123 string_set(&conn
->user
,"");
124 string_set(&conn
->dirpath
,"");
125 string_set(&conn
->connectpath
,"");
126 string_set(&conn
->origpath
,"");
128 DLIST_ADD(Connections
, conn
);
133 /****************************************************************************
134 close all conn structures
135 ****************************************************************************/
136 void conn_close_all(void)
138 connection_struct
*conn
, *next
;
139 for (conn
=Connections
;conn
;conn
=next
) {
141 close_cnum(conn
, conn
->vuid
);
145 /****************************************************************************
146 Idle inactive connections.
147 ****************************************************************************/
149 BOOL
conn_idle_all(time_t t
, int deadtime
)
151 pipes_struct
*plist
= NULL
;
153 connection_struct
*conn
, *next
;
155 for (conn
=Connections
;conn
;conn
=next
) {
157 /* close dirptrs on connections that are idle */
158 if ((t
-conn
->lastused
) > DPTR_IDLE_TIMEOUT
)
161 if (conn
->num_files_open
> 0 ||
162 (t
-conn
->lastused
)<deadtime
)
167 * Check all pipes for any open handles. We cannot
168 * idle with a handle open.
171 for (plist
= get_first_internal_pipe(); plist
; plist
= get_next_internal_pipe(plist
))
172 if (plist
->pipe_handles
&& plist
->pipe_handles
->count
)
178 /****************************************************************************
179 clear a vuid out of the validity cache, and as the 'owner' of a connection.
180 ****************************************************************************/
181 void conn_clear_vuid_cache(uint16 vuid
)
183 connection_struct
*conn
;
186 for (conn
=Connections
;conn
;conn
=conn
->next
) {
187 if (conn
->vuid
== vuid
) {
188 conn
->vuid
= UID_FIELD_INVALID
;
191 for (i
=0;i
<conn
->vuid_cache
.entries
&& i
< VUID_CACHE_SIZE
;i
++) {
192 if (conn
->vuid_cache
.list
[i
] == vuid
) {
193 conn
->vuid_cache
.list
[i
] = UID_FIELD_INVALID
;
199 /****************************************************************************
200 Free a conn structure.
201 ****************************************************************************/
203 void conn_free(connection_struct
*conn
)
205 vfs_handle_struct
*handle
= NULL
, *thandle
= NULL
;
206 TALLOC_CTX
*mem_ctx
= NULL
;
208 /* Free vfs_connection_struct */
209 handle
= conn
->vfs_handles
;
211 DLIST_REMOVE(conn
->vfs_handles
, handle
);
212 thandle
= handle
->next
;
213 if (handle
->free_data
)
214 handle
->free_data(&handle
->data
);
218 DLIST_REMOVE(Connections
, conn
);
220 if (conn
->ngroups
&& conn
->groups
) {
221 SAFE_FREE(conn
->groups
);
225 free_namearray(conn
->veto_list
);
226 free_namearray(conn
->hide_list
);
227 free_namearray(conn
->veto_oplock_list
);
229 string_free(&conn
->user
);
230 string_free(&conn
->dirpath
);
231 string_free(&conn
->connectpath
);
232 string_free(&conn
->origpath
);
234 bitmap_clear(bmap
, conn
->cnum
);
237 mem_ctx
= conn
->mem_ctx
;
239 talloc_destroy(mem_ctx
);
243 /****************************************************************************
244 receive a smbcontrol message to forcibly unmount a share
245 the message contains just a share name and all instances of that
247 the special sharename '*' forces unmount of all shares
248 ****************************************************************************/
249 void msg_force_tdis(int msg_type
, pid_t pid
, void *buf
, size_t len
)
251 connection_struct
*conn
, *next
;
254 fstrcpy(sharename
, buf
);
256 if (strcmp(sharename
, "*") == 0) {
257 DEBUG(1,("Forcing close of all shares\n"));
262 for (conn
=Connections
;conn
;conn
=next
) {
264 if (strequal(lp_servicename(conn
->service
), sharename
)) {
265 DEBUG(1,("Forcing close of share %s cnum=%d\n",
266 sharename
, conn
->cnum
));
267 close_cnum(conn
, (uint16
)-1);