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 /* The connections bitmap is expanded in increments of BITMAP_BLOCK_SZ. The
25 * maximum size of the bitmap is the largest positive integer, but you will hit
26 * the "max connections" limit, looong before that.
28 #define BITMAP_BLOCK_SZ 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(BITMAP_BLOCK_SZ
);
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
;
102 i
= bitmap_find(bmap
, find_offset
);
105 /* Expand the connections bitmap. */
107 int newsz
= bmap
->n
+ BITMAP_BLOCK_SZ
;
108 struct bitmap
* nbmap
;
112 DEBUG(0,("ERROR! Out of connection structures\n"));
116 DEBUG(4,("resizing connections bitmap from %d to %d\n",
119 nbmap
= bitmap_allocate(newsz
);
121 bitmap_copy(nbmap
, bmap
);
125 find_offset
= oldsz
; /* Start next search in the new portion. */
130 if ((mem_ctx
=talloc_init("connection_struct"))==NULL
) {
131 DEBUG(0,("talloc_init(connection_struct) failed!\n"));
135 if ((conn
=(connection_struct
*)talloc_zero(mem_ctx
, sizeof(*conn
)))==NULL
) {
136 DEBUG(0,("talloc_zero() failed!\n"));
139 conn
->mem_ctx
= mem_ctx
;
146 string_set(&conn
->user
,"");
147 string_set(&conn
->dirpath
,"");
148 string_set(&conn
->connectpath
,"");
149 string_set(&conn
->origpath
,"");
151 DLIST_ADD(Connections
, conn
);
156 /****************************************************************************
157 close all conn structures
158 ****************************************************************************/
159 void conn_close_all(void)
161 connection_struct
*conn
, *next
;
162 for (conn
=Connections
;conn
;conn
=next
) {
164 close_cnum(conn
, conn
->vuid
);
168 /****************************************************************************
169 Idle inactive connections.
170 ****************************************************************************/
172 BOOL
conn_idle_all(time_t t
, int deadtime
)
174 pipes_struct
*plist
= NULL
;
176 connection_struct
*conn
, *next
;
178 for (conn
=Connections
;conn
;conn
=next
) {
180 /* close dirptrs on connections that are idle */
181 if ((t
-conn
->lastused
) > DPTR_IDLE_TIMEOUT
)
184 if (conn
->num_files_open
> 0 ||
185 (t
-conn
->lastused
)<deadtime
)
190 * Check all pipes for any open handles. We cannot
191 * idle with a handle open.
194 for (plist
= get_first_internal_pipe(); plist
; plist
= get_next_internal_pipe(plist
))
195 if (plist
->pipe_handles
&& plist
->pipe_handles
->count
)
201 /****************************************************************************
202 clear a vuid out of the validity cache, and as the 'owner' of a connection.
203 ****************************************************************************/
204 void conn_clear_vuid_cache(uint16 vuid
)
206 connection_struct
*conn
;
209 for (conn
=Connections
;conn
;conn
=conn
->next
) {
210 if (conn
->vuid
== vuid
) {
211 conn
->vuid
= UID_FIELD_INVALID
;
214 for (i
=0;i
<conn
->vuid_cache
.entries
&& i
< VUID_CACHE_SIZE
;i
++) {
215 if (conn
->vuid_cache
.list
[i
] == vuid
) {
216 conn
->vuid_cache
.list
[i
] = UID_FIELD_INVALID
;
222 /****************************************************************************
223 Free a conn structure.
224 ****************************************************************************/
226 void conn_free(connection_struct
*conn
)
228 vfs_handle_struct
*handle
= NULL
, *thandle
= NULL
;
229 TALLOC_CTX
*mem_ctx
= NULL
;
231 /* Free vfs_connection_struct */
232 handle
= conn
->vfs_handles
;
234 DLIST_REMOVE(conn
->vfs_handles
, handle
);
235 thandle
= handle
->next
;
236 if (handle
->free_data
)
237 handle
->free_data(&handle
->data
);
241 DLIST_REMOVE(Connections
, conn
);
243 if (conn
->ngroups
&& conn
->groups
) {
244 SAFE_FREE(conn
->groups
);
248 free_namearray(conn
->veto_list
);
249 free_namearray(conn
->hide_list
);
250 free_namearray(conn
->veto_oplock_list
);
252 string_free(&conn
->user
);
253 string_free(&conn
->dirpath
);
254 string_free(&conn
->connectpath
);
255 string_free(&conn
->origpath
);
257 bitmap_clear(bmap
, conn
->cnum
);
260 mem_ctx
= conn
->mem_ctx
;
262 talloc_destroy(mem_ctx
);
266 /****************************************************************************
267 receive a smbcontrol message to forcibly unmount a share
268 the message contains just a share name and all instances of that
270 the special sharename '*' forces unmount of all shares
271 ****************************************************************************/
272 void msg_force_tdis(int msg_type
, pid_t pid
, void *buf
, size_t len
)
274 connection_struct
*conn
, *next
;
277 fstrcpy(sharename
, buf
);
279 if (strcmp(sharename
, "*") == 0) {
280 DEBUG(1,("Forcing close of all shares\n"));
285 for (conn
=Connections
;conn
;conn
=next
) {
287 if (strequal(lp_servicename(conn
->service
), sharename
)) {
288 DEBUG(1,("Forcing close of share %s cnum=%d\n",
289 sharename
, conn
->cnum
));
290 close_cnum(conn
, (uint16
)-1);