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)
96 connection_struct
*conn
;
99 i
= bitmap_find(bmap
, 1);
102 DEBUG(1,("ERROR! Out of connection structures\n"));
106 conn
= (connection_struct
*)malloc(sizeof(*conn
));
107 if (!conn
) return NULL
;
116 string_set(&conn
->user
,"");
117 string_set(&conn
->dirpath
,"");
118 string_set(&conn
->connectpath
,"");
119 string_set(&conn
->origpath
,"");
121 DLIST_ADD(Connections
, conn
);
126 /****************************************************************************
127 close all conn structures
128 ****************************************************************************/
129 void conn_close_all(void)
131 connection_struct
*conn
, *next
;
132 for (conn
=Connections
;conn
;conn
=next
) {
134 close_cnum(conn
, conn
->vuid
);
138 /****************************************************************************
139 Idle inactive connections.
140 ****************************************************************************/
142 BOOL
conn_idle_all(time_t t
, int deadtime
)
144 pipes_struct
*plist
= NULL
;
146 connection_struct
*conn
, *next
;
148 for (conn
=Connections
;conn
;conn
=next
) {
150 /* close dirptrs on connections that are idle */
151 if ((t
-conn
->lastused
) > DPTR_IDLE_TIMEOUT
)
154 if (conn
->num_files_open
> 0 ||
155 (t
-conn
->lastused
)<deadtime
)
160 * Check all pipes for any open handles. We cannot
161 * idle with a handle open.
164 for (plist
= get_first_internal_pipe(); plist
; plist
= get_next_internal_pipe(plist
))
165 if (plist
->pipe_handles
&& plist
->pipe_handles
->count
)
171 /****************************************************************************
172 clear a vuid out of the validity cache, and as the 'owner' of a connection.
173 ****************************************************************************/
174 void conn_clear_vuid_cache(uint16 vuid
)
176 connection_struct
*conn
;
179 for (conn
=Connections
;conn
;conn
=conn
->next
) {
180 if (conn
->vuid
== vuid
) {
181 conn
->vuid
= UID_FIELD_INVALID
;
184 for (i
=0;i
<conn
->vuid_cache
.entries
&& i
< VUID_CACHE_SIZE
;i
++) {
185 if (conn
->vuid_cache
.list
[i
] == vuid
) {
186 conn
->vuid_cache
.list
[i
] = UID_FIELD_INVALID
;
192 /****************************************************************************
193 Free a conn structure.
194 ****************************************************************************/
196 void conn_free(connection_struct
*conn
)
198 smb_vfs_handle_struct
*handle
, *thandle
;
199 void (*done_fptr
)(connection_struct
*the_conn
);
201 /* Free vfs_connection_struct */
202 handle
= conn
->vfs_private
;
204 /* Only call dlclose for the old modules */
205 if (handle
->handle
) {
206 /* Close dlopen() handle */
207 done_fptr
= (void (*)(connection_struct
*))sys_dlsym(handle
->handle
, "vfs_done");
209 if (done_fptr
== NULL
) {
210 DEBUG(3, ("No vfs_done() symbol found in module with handle %p, ignoring\n", handle
->handle
));
214 sys_dlclose(handle
->handle
);
216 DLIST_REMOVE(conn
->vfs_private
, handle
);
217 thandle
= handle
->next
;
222 DLIST_REMOVE(Connections
, conn
);
224 if (conn
->ngroups
&& conn
->groups
) {
225 SAFE_FREE(conn
->groups
);
229 free_namearray(conn
->veto_list
);
230 free_namearray(conn
->hide_list
);
231 free_namearray(conn
->veto_oplock_list
);
233 string_free(&conn
->user
);
234 string_free(&conn
->dirpath
);
235 string_free(&conn
->connectpath
);
236 string_free(&conn
->origpath
);
238 bitmap_clear(bmap
, conn
->cnum
);
246 /****************************************************************************
247 receive a smbcontrol message to forcibly unmount a share
248 the message contains just a share name and all instances of that
250 the special sharename '*' forces unmount of all shares
251 ****************************************************************************/
252 void msg_force_tdis(int msg_type
, pid_t pid
, void *buf
, size_t len
)
254 connection_struct
*conn
, *next
;
257 fstrcpy(sharename
, buf
);
259 if (strcmp(sharename
, "*") == 0) {
260 DEBUG(1,("Forcing close of all shares\n"));
265 for (conn
=Connections
;conn
;conn
=next
) {
267 if (strequal(lp_servicename(conn
->service
), sharename
)) {
268 DEBUG(1,("Forcing close of share %s cnum=%d\n",
269 sharename
, conn
->cnum
));
270 close_cnum(conn
, (uint16
)-1);