Unix SMB/CIFS implementation.
Manage connections_struct structures
Copyright (C) Andrew Tridgell 1998
+ Copyright (C) Alexander Bokovoy 2002
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-/* set these to define the limits of the server. NOTE These are on a
- per-client basis. Thus any one machine can't connect to more than
- MAX_CONNECTIONS services, but any number of machines may connect at
- one time. */
-#define MAX_CONNECTIONS 128
+/* The connections bitmap is expanded in increments of BITMAP_BLOCK_SZ. The
+ * maximum size of the bitmap is the largest positive integer, but you will hit
+ * the "max connections" limit, looong before that.
+ */
+#define BITMAP_BLOCK_SZ 128
static connection_struct *Connections;
****************************************************************************/
void conn_init(void)
{
- bmap = bitmap_allocate(MAX_CONNECTIONS);
+ bmap = bitmap_allocate(BITMAP_BLOCK_SZ);
}
/****************************************************************************
/****************************************************************************
check if a snum is in use
****************************************************************************/
-BOOL conn_snum_used(int snum)
+bool conn_snum_used(int snum)
{
connection_struct *conn;
for (conn=Connections;conn;conn=conn->next) {
- if (conn->service == snum) {
+ if (conn->params->service == snum) {
return(True);
}
}
return(False);
}
-
/****************************************************************************
-find a conn given a cnum
+ Find a conn given a cnum.
****************************************************************************/
-connection_struct *conn_find(int cnum)
+
+connection_struct *conn_find(unsigned cnum)
{
int count=0;
connection_struct *conn;
return NULL;
}
-
/****************************************************************************
find first available connection slot, starting from a random position.
The randomisation stops problems with the server dieing and clients
{
connection_struct *conn;
int i;
+ int find_offset = 1;
- i = bitmap_find(bmap, 1);
+find_again:
+ i = bitmap_find(bmap, find_offset);
if (i == -1) {
- DEBUG(1,("ERROR! Out of connection structures\n"));
- return NULL;
+ /* Expand the connections bitmap. */
+ int oldsz = bmap->n;
+ int newsz = bmap->n + BITMAP_BLOCK_SZ;
+ struct bitmap * nbmap;
+
+ if (newsz <= oldsz) {
+ /* Integer wrap. */
+ DEBUG(0,("ERROR! Out of connection structures\n"));
+ return NULL;
+ }
+
+ DEBUG(4,("resizing connections bitmap from %d to %d\n",
+ oldsz, newsz));
+
+ nbmap = bitmap_allocate(newsz);
+ if (!nbmap) {
+ DEBUG(0,("ERROR! malloc fail.\n"));
+ return NULL;
+ }
+
+ bitmap_copy(nbmap, bmap);
+ bitmap_free(bmap);
+
+ bmap = nbmap;
+ find_offset = oldsz; /* Start next search in the new portion. */
+
+ goto find_again;
}
- conn = (connection_struct *)malloc(sizeof(*conn));
- if (!conn) return NULL;
+ /* The bitmap position is used below as the connection number
+ * conn->cnum). This ends up as the TID field in the SMB header,
+ * which is limited to 16 bits (we skip 0xffff which is the
+ * NULL TID).
+ */
+ if (i > 65534) {
+ DEBUG(0, ("Maximum connection limit reached\n"));
+ return NULL;
+ }
- ZERO_STRUCTP(conn);
+ if (!(conn=TALLOC_ZERO_P(NULL, connection_struct)) ||
+ !(conn->params = TALLOC_P(conn, struct share_params))) {
+ DEBUG(0,("TALLOC_ZERO() failed!\n"));
+ TALLOC_FREE(conn);
+ return NULL;
+ }
conn->cnum = i;
bitmap_set(bmap, i);
num_open++;
- string_set(&conn->user,"");
string_set(&conn->dirpath,"");
string_set(&conn->connectpath,"");
string_set(&conn->origpath,"");
}
/****************************************************************************
-close all conn structures
+ Close all conn structures.
+return true if any were closed
****************************************************************************/
-void conn_close_all(void)
+bool conn_close_all(void)
{
connection_struct *conn, *next;
+ bool ret = false;
for (conn=Connections;conn;conn=next) {
next=conn->next;
- close_cnum(conn, (uint16)-1);
+ set_current_service(conn, 0, True);
+ close_cnum(conn, conn->vuid);
+ ret = true;
}
+ return ret;
}
/****************************************************************************
-idle inactive connections
+ Idle inactive connections.
****************************************************************************/
-BOOL conn_idle_all(time_t t, int deadtime)
+
+bool conn_idle_all(time_t t)
{
- BOOL allidle = True;
- connection_struct *conn, *next;
+ int deadtime = lp_deadtime()*60;
+ pipes_struct *plist = NULL;
+ connection_struct *conn;
+
+ if (deadtime <= 0)
+ deadtime = DEFAULT_SMBD_TIMEOUT;
+
+ for (conn=Connections;conn;conn=conn->next) {
+
+ time_t age = t - conn->lastused;
+
+ /* Update if connection wasn't idle. */
+ if (conn->lastused != conn->lastused_count) {
+ conn->lastused = t;
+ conn->lastused_count = t;
+ }
- for (conn=Connections;conn;conn=next) {
- next=conn->next;
/* close dirptrs on connections that are idle */
- if ((t-conn->lastused) > DPTR_IDLE_TIMEOUT)
+ if (age > DPTR_IDLE_TIMEOUT) {
dptr_idlecnum(conn);
+ }
- if (conn->num_files_open > 0 ||
- (t-conn->lastused)<deadtime)
- allidle = False;
+ if (conn->num_files_open > 0 || age < deadtime) {
+ return False;
+ }
}
- return allidle;
+ /*
+ * Check all pipes for any open handles. We cannot
+ * idle with a handle open.
+ */
+
+ for (plist = get_first_internal_pipe(); plist;
+ plist = get_next_internal_pipe(plist)) {
+ if (plist->pipe_handles && plist->pipe_handles->count) {
+ return False;
+ }
+ }
+
+ return True;
}
/****************************************************************************
- Free a conn structure.
+ Clear a vuid out of the validity cache, and as the 'owner' of a connection.
****************************************************************************/
-void conn_free(connection_struct *conn)
+void conn_clear_vuid_caches(uint16_t vuid)
{
- /* Free vfs_connection_struct */
-
-#ifdef HAVE_LIBDL
- if (conn->dl_handle != NULL) {
- /* Close dlopen() handle */
- dlclose(conn->dl_handle);
+ connection_struct *conn;
+
+ for (conn=Connections;conn;conn=conn->next) {
+ if (conn->vuid == vuid) {
+ conn->vuid = UID_FIELD_INVALID;
+ }
+ conn_clear_vuid_cache(conn, vuid);
}
-#endif /* HAVE_LIBDL */
+}
- DLIST_REMOVE(Connections, conn);
+/****************************************************************************
+ Free a conn structure - internal part.
+****************************************************************************/
+
+void conn_free_internal(connection_struct *conn)
+{
+ vfs_handle_struct *handle = NULL, *thandle = NULL;
+ struct trans_state *state = NULL;
+
+ /* Free vfs_connection_struct */
+ handle = conn->vfs_handles;
+ while(handle) {
+ thandle = handle->next;
+ DLIST_REMOVE(conn->vfs_handles, handle);
+ if (handle->free_data)
+ handle->free_data(&handle->data);
+ handle = thandle;
+ }
- if (conn->ngroups && conn->groups) {
- SAFE_FREE(conn->groups);
- conn->ngroups = 0;
+ /* Free any pending transactions stored on this conn. */
+ for (state = conn->pending_trans; state; state = state->next) {
+ /* state->setup is a talloc child of state. */
+ SAFE_FREE(state->param);
+ SAFE_FREE(state->data);
}
- delete_nt_token(&conn->nt_user_token);
free_namearray(conn->veto_list);
free_namearray(conn->hide_list);
free_namearray(conn->veto_oplock_list);
+ free_namearray(conn->aio_write_behind_list);
- string_free(&conn->user);
string_free(&conn->dirpath);
string_free(&conn->connectpath);
string_free(&conn->origpath);
- bitmap_clear(bmap, conn->cnum);
- num_open--;
-
ZERO_STRUCTP(conn);
- SAFE_FREE(conn);
+ talloc_destroy(conn);
}
+/****************************************************************************
+ Free a conn structure.
+****************************************************************************/
+void conn_free(connection_struct *conn)
+{
+ DLIST_REMOVE(Connections, conn);
+
+ bitmap_clear(bmap, conn->cnum);
+
+ SMB_ASSERT(num_open > 0);
+ num_open--;
+
+ conn_free_internal(conn);
+}
+
/****************************************************************************
receive a smbcontrol message to forcibly unmount a share
the message contains just a share name and all instances of that
share are unmounted
the special sharename '*' forces unmount of all shares
****************************************************************************/
-void msg_force_tdis(int msg_type, pid_t pid, void *buf, size_t len)
+void msg_force_tdis(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
{
connection_struct *conn, *next;
fstring sharename;
- fstrcpy(sharename, buf);
+ fstrcpy(sharename, (const char *)data->data);
if (strcmp(sharename, "*") == 0) {
DEBUG(1,("Forcing close of all shares\n"));
for (conn=Connections;conn;conn=next) {
next=conn->next;
- if (strequal(lp_servicename(conn->service), sharename)) {
+ if (strequal(lp_servicename(SNUM(conn)), sharename)) {
DEBUG(1,("Forcing close of share %s cnum=%d\n",
sharename, conn->cnum));
close_cnum(conn, (uint16)-1);
git.samba.org / kai / samba.git / blobdiff