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/>.
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,
43 struct connection_struct *conn;
45 for (conn=sconn->connections; conn; conn=conn->next) {
46 if (conn->params->service == snum) {
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 = NULL;
64 conn = talloc_zero(NULL, connection_struct);
66 DBG_ERR("talloc_zero failed\n");
69 conn->params = talloc(conn, struct share_params);
70 if (conn->params == NULL) {
71 DBG_ERR("talloc_zero failed\n");
75 conn->vuid_cache = talloc_zero(conn, struct vuid_cache);
76 if (conn->vuid_cache == NULL) {
77 DBG_ERR("talloc_zero failed\n");
81 conn->connectpath = talloc_strdup(conn, "");
82 if (conn->connectpath == NULL) {
83 DBG_ERR("talloc_zero failed\n");
87 conn->cwd_fsp = talloc_zero(conn, struct files_struct);
88 if (conn->cwd_fsp == NULL) {
89 DBG_ERR("talloc_zero failed\n");
93 conn->cwd_fsp->fsp_name = synthetic_smb_fname(conn->cwd_fsp,
99 if (conn->cwd_fsp->fsp_name == NULL) {
103 conn->cwd_fsp->fh = talloc_zero(conn->cwd_fsp, struct fd_handle);
104 if (conn->cwd_fsp->fh == NULL) {
105 DBG_ERR("talloc_zero failed\n");
110 conn->force_group_gid = (gid_t)-1;
111 fsp_set_fd(conn->cwd_fsp, -1);
112 conn->cwd_fsp->fnum = FNUM_FIELD_INVALID;
113 conn->cwd_fsp->conn = conn;
115 DLIST_ADD(sconn->connections, conn);
116 sconn->num_connections++;
121 /****************************************************************************
122 Clear a vuid out of the connection's vuid cache
123 ****************************************************************************/
125 static void conn_clear_vuid_cache(connection_struct *conn, uint64_t vuid)
129 for (i=0; i<VUID_CACHE_SIZE; i++) {
130 struct vuid_cache_entry *ent;
132 ent = &conn->vuid_cache->array[i];
134 if (ent->vuid == vuid) {
135 ent->vuid = UID_FIELD_INVALID;
137 * We need to keep conn->session_info around
138 * if it's equal to ent->session_info as a SMBulogoff
139 * is often followed by a SMBtdis (with an invalid
140 * vuid). The debug code (or regular code in
141 * vfs_full_audit) wants to refer to the
142 * conn->session_info pointer to print debug
143 * statements. Theoretically this is a bug,
144 * as once the vuid is gone the session_info
145 * on the conn struct isn't valid any more,
146 * but there's enough code that assumes
147 * conn->session_info is never null that
148 * it's easier to hold onto the old pointer
149 * until we get a new sessionsetupX.
150 * As everything is hung off the
151 * conn pointer as a talloc context we're not
152 * leaking memory here. See bug #6315. JRA.
154 if (conn->session_info == ent->session_info) {
155 ent->session_info = NULL;
157 TALLOC_FREE(ent->session_info);
159 ent->read_only = False;
160 ent->share_access = 0;
165 /****************************************************************************
166 Clear a vuid out of the validity cache, and as the 'owner' of a connection.
168 Called from invalidate_vuid()
169 ****************************************************************************/
171 void conn_clear_vuid_caches(struct smbd_server_connection *sconn, uint64_t vuid)
173 connection_struct *conn;
175 for (conn=sconn->connections; conn;conn=conn->next) {
176 if (conn->vuid == vuid) {
177 conn->vuid = UID_FIELD_INVALID;
179 conn_clear_vuid_cache(conn, vuid);
183 /****************************************************************************
184 Free a conn structure - internal part.
185 ****************************************************************************/
187 static void conn_free_internal(connection_struct *conn)
189 vfs_handle_struct *handle = NULL, *thandle = NULL;
190 struct trans_state *state = NULL;
192 /* Free vfs_connection_struct */
193 handle = conn->vfs_handles;
195 thandle = handle->next;
196 DLIST_REMOVE(conn->vfs_handles, handle);
197 if (handle->free_data)
198 handle->free_data(&handle->data);
202 /* Free any pending transactions stored on this conn. */
203 for (state = conn->pending_trans; state; state = state->next) {
204 /* state->setup is a talloc child of state. */
205 SAFE_FREE(state->param);
206 SAFE_FREE(state->data);
209 free_namearray(conn->veto_list);
210 free_namearray(conn->hide_list);
211 free_namearray(conn->veto_oplock_list);
212 free_namearray(conn->aio_write_behind_list);
215 talloc_destroy(conn);
218 /****************************************************************************
219 Free a conn structure.
220 ****************************************************************************/
222 void conn_free(connection_struct *conn)
224 if (conn->sconn == NULL) {
225 conn_free_internal(conn);
229 DLIST_REMOVE(conn->sconn->connections, conn);
230 SMB_ASSERT(conn->sconn->num_connections > 0);
231 conn->sconn->num_connections--;
233 conn_free_internal(conn);