s3:smbd: s/struct timed_event/struct tevent_timer
[Samba/gebeck_regimport.git] / source3 / smbd / conn.c
blob8f472c0d2458f742edccf441a90840f2900a442a
1 /*
2 Unix SMB/CIFS implementation.
3 Manage connections_struct structures
4 Copyright (C) Andrew Tridgell 1998
5 Copyright (C) Alexander Bokovoy 2002
6 Copyright (C) Jeremy Allison 2010
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 3 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, see <http://www.gnu.org/licenses/>.
22 #include "includes.h"
23 #include "smbd/smbd.h"
24 #include "smbd/globals.h"
25 #include "lib/util/bitmap.h"
27 /****************************************************************************
28 Return the number of open connections.
29 ****************************************************************************/
31 int conn_num_open(struct smbd_server_connection *sconn)
33 return sconn->num_connections;
36 /****************************************************************************
37 Check if a snum is in use.
38 ****************************************************************************/
40 bool conn_snum_used(struct smbd_server_connection *sconn,
41 int snum)
43 struct connection_struct *conn;
45 for (conn=sconn->connections; conn; conn=conn->next) {
46 if (conn->params->service == snum) {
47 return true;
51 return false;
54 /****************************************************************************
55 Find first available connection slot, starting from a random position.
56 The randomisation stops problems with the server dieing and clients
57 thinking the server is still available.
58 ****************************************************************************/
60 connection_struct *conn_new(struct smbd_server_connection *sconn)
62 connection_struct *conn;
64 if (!(conn=talloc_zero(NULL, connection_struct)) ||
65 !(conn->params = talloc(conn, struct share_params)) ||
66 !(conn->vuid_cache = talloc_zero(conn, struct vuid_cache)) ||
67 !(conn->connectpath = talloc_strdup(conn, "")) ||
68 !(conn->origpath = talloc_strdup(conn, ""))) {
69 DEBUG(0,("TALLOC_ZERO() failed!\n"));
70 TALLOC_FREE(conn);
71 return NULL;
73 conn->sconn = sconn;
74 conn->force_group_gid = (gid_t)-1;
76 DLIST_ADD(sconn->connections, conn);
77 sconn->num_connections++;
79 return conn;
82 /****************************************************************************
83 Clear a vuid out of the connection's vuid cache
84 ****************************************************************************/
86 static void conn_clear_vuid_cache(connection_struct *conn, uint64_t vuid)
88 int i;
90 for (i=0; i<VUID_CACHE_SIZE; i++) {
91 struct vuid_cache_entry *ent;
93 ent = &conn->vuid_cache->array[i];
95 if (ent->vuid == vuid) {
96 ent->vuid = UID_FIELD_INVALID;
98 * We need to keep conn->session_info around
99 * if it's equal to ent->session_info as a SMBulogoff
100 * is often followed by a SMBtdis (with an invalid
101 * vuid). The debug code (or regular code in
102 * vfs_full_audit) wants to refer to the
103 * conn->session_info pointer to print debug
104 * statements. Theoretically this is a bug,
105 * as once the vuid is gone the session_info
106 * on the conn struct isn't valid any more,
107 * but there's enough code that assumes
108 * conn->session_info is never null that
109 * it's easier to hold onto the old pointer
110 * until we get a new sessionsetupX.
111 * As everything is hung off the
112 * conn pointer as a talloc context we're not
113 * leaking memory here. See bug #6315. JRA.
115 if (conn->session_info == ent->session_info) {
116 ent->session_info = NULL;
117 } else {
118 TALLOC_FREE(ent->session_info);
120 ent->read_only = False;
121 ent->share_access = 0;
126 /****************************************************************************
127 Clear a vuid out of the validity cache, and as the 'owner' of a connection.
129 Called from invalidate_vuid()
130 ****************************************************************************/
132 void conn_clear_vuid_caches(struct smbd_server_connection *sconn, uint64_t vuid)
134 connection_struct *conn;
136 for (conn=sconn->connections; conn;conn=conn->next) {
137 if (conn->vuid == vuid) {
138 conn->vuid = UID_FIELD_INVALID;
140 conn_clear_vuid_cache(conn, vuid);
144 /****************************************************************************
145 Free a conn structure - internal part.
146 ****************************************************************************/
148 static void conn_free_internal(connection_struct *conn)
150 vfs_handle_struct *handle = NULL, *thandle = NULL;
151 struct trans_state *state = NULL;
153 /* Free vfs_connection_struct */
154 handle = conn->vfs_handles;
155 while(handle) {
156 thandle = handle->next;
157 DLIST_REMOVE(conn->vfs_handles, handle);
158 if (handle->free_data)
159 handle->free_data(&handle->data);
160 handle = thandle;
163 /* Free any pending transactions stored on this conn. */
164 for (state = conn->pending_trans; state; state = state->next) {
165 /* state->setup is a talloc child of state. */
166 SAFE_FREE(state->param);
167 SAFE_FREE(state->data);
170 free_namearray(conn->veto_list);
171 free_namearray(conn->hide_list);
172 free_namearray(conn->veto_oplock_list);
173 free_namearray(conn->aio_write_behind_list);
175 ZERO_STRUCTP(conn);
176 talloc_destroy(conn);
179 /****************************************************************************
180 Free a conn structure.
181 ****************************************************************************/
183 void conn_free(connection_struct *conn)
185 if (conn->sconn == NULL) {
186 conn_free_internal(conn);
187 return;
190 DLIST_REMOVE(conn->sconn->connections, conn);
191 SMB_ASSERT(conn->sconn->num_connections > 0);
192 conn->sconn->num_connections--;
194 conn_free_internal(conn);