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 set_current_service(conn
, 0, True
);
165 close_cnum(conn
, conn
->vuid
);
169 /****************************************************************************
170 Idle inactive connections.
171 ****************************************************************************/
173 BOOL
conn_idle_all(time_t t
, int deadtime
)
175 pipes_struct
*plist
= NULL
;
177 connection_struct
*conn
, *next
;
179 for (conn
=Connections
;conn
;conn
=next
) {
181 /* close dirptrs on connections that are idle */
182 if ((t
-conn
->lastused
) > DPTR_IDLE_TIMEOUT
)
185 if (conn
->num_files_open
> 0 ||
186 (t
-conn
->lastused
)<deadtime
)
191 * Check all pipes for any open handles. We cannot
192 * idle with a handle open.
195 for (plist
= get_first_internal_pipe(); plist
; plist
= get_next_internal_pipe(plist
))
196 if (plist
->pipe_handles
&& plist
->pipe_handles
->count
)
202 /****************************************************************************
203 Clear a vuid out of the validity cache, and as the 'owner' of a connection.
204 ****************************************************************************/
206 void conn_clear_vuid_cache(uint16 vuid
)
208 connection_struct
*conn
;
211 for (conn
=Connections
;conn
;conn
=conn
->next
) {
212 if (conn
->vuid
== vuid
) {
213 conn
->vuid
= UID_FIELD_INVALID
;
216 for (i
=0;i
<conn
->vuid_cache
.entries
&& i
< VUID_CACHE_SIZE
;i
++) {
217 if (conn
->vuid_cache
.array
[i
].vuid
== vuid
) {
218 struct vuid_cache_entry
*ent
= &conn
->vuid_cache
.array
[i
];
219 ent
->vuid
= UID_FIELD_INVALID
;
220 ent
->read_only
= False
;
221 ent
->admin_user
= False
;
227 /****************************************************************************
228 Free a conn structure.
229 ****************************************************************************/
231 void conn_free(connection_struct
*conn
)
233 vfs_handle_struct
*handle
= NULL
, *thandle
= NULL
;
234 TALLOC_CTX
*mem_ctx
= NULL
;
236 /* Free vfs_connection_struct */
237 handle
= conn
->vfs_handles
;
239 DLIST_REMOVE(conn
->vfs_handles
, handle
);
240 thandle
= handle
->next
;
241 if (handle
->free_data
)
242 handle
->free_data(&handle
->data
);
246 DLIST_REMOVE(Connections
, conn
);
248 if (conn
->ngroups
&& conn
->groups
) {
249 SAFE_FREE(conn
->groups
);
253 free_namearray(conn
->veto_list
);
254 free_namearray(conn
->hide_list
);
255 free_namearray(conn
->veto_oplock_list
);
257 string_free(&conn
->user
);
258 string_free(&conn
->dirpath
);
259 string_free(&conn
->connectpath
);
260 string_free(&conn
->origpath
);
262 bitmap_clear(bmap
, conn
->cnum
);
265 mem_ctx
= conn
->mem_ctx
;
267 talloc_destroy(mem_ctx
);
271 /****************************************************************************
272 receive a smbcontrol message to forcibly unmount a share
273 the message contains just a share name and all instances of that
275 the special sharename '*' forces unmount of all shares
276 ****************************************************************************/
277 void msg_force_tdis(int msg_type
, pid_t pid
, void *buf
, size_t len
)
279 connection_struct
*conn
, *next
;
282 fstrcpy(sharename
, buf
);
284 if (strcmp(sharename
, "*") == 0) {
285 DEBUG(1,("Forcing close of all shares\n"));
290 for (conn
=Connections
;conn
;conn
=next
) {
292 if (strequal(lp_servicename(conn
->service
), sharename
)) {
293 DEBUG(1,("Forcing close of share %s cnum=%d\n",
294 sharename
, conn
->cnum
));
295 close_cnum(conn
, (uint16
)-1);