/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
connection claim routines
Copyright (C) Andrew Tridgell 1998
#include "includes.h"
-extern fstring remote_machine;
-static TDB_CONTEXT *tdb;
-
-/****************************************************************************
- Return the connection tdb context (used for message send all).
-****************************************************************************/
-
-TDB_CONTEXT *conn_tdb_ctx(void)
-{
- return tdb;
-}
-
/****************************************************************************
Delete a connection record.
****************************************************************************/
-BOOL yield_connection(connection_struct *conn,char *name)
+BOOL yield_connection(connection_struct *conn, const char *name)
{
- struct connections_key key;
- TDB_DATA kbuf;
-
- if (!tdb) return False;
+ struct db_record *rec;
+ NTSTATUS status;
DEBUG(3,("Yielding connection to %s\n",name));
- ZERO_STRUCT(key);
- key.pid = sys_getpid();
- key.cnum = conn?conn->cnum:-1;
- fstrcpy(key.name, name);
-
- kbuf.dptr = (char *)&key;
- kbuf.dsize = sizeof(key);
+ if (!(rec = connections_fetch_entry(NULL, conn, name))) {
+ DEBUG(0, ("connections_fetch_entry failed\n"));
+ return False;
+ }
- if (tdb_delete(tdb, kbuf) != 0) {
- int dbg_lvl = (!conn && (tdb_error(tdb) == TDB_ERR_NOEXIST)) ? 3 : 0;
- DEBUG(dbg_lvl,("yield_connection: tdb_delete for name %s failed with error %s.\n",
- name, tdb_errorstr(tdb) ));
- return (False);
+ status = rec->delete_rec(rec);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG( NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND) ? 3 : 0,
+ ("deleting connection record returned %s\n",
+ nt_errstr(status)));
}
- return(True);
+ TALLOC_FREE(rec);
+ return NT_STATUS_IS_OK(status);
}
struct count_stat {
pid_t mypid;
int curr_connections;
- char *name;
+ const char *name;
BOOL Clear;
};
Count the entries belonging to a service in the connection db.
****************************************************************************/
-static int count_fn( TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf, void *udp)
+static int count_fn(struct db_record *rec,
+ const struct connections_key *ckey,
+ const struct connections_data *crec,
+ void *udp)
{
- struct connections_data crec;
struct count_stat *cs = (struct count_stat *)udp;
- if (dbuf.dsize != sizeof(crec))
- return 0;
-
- memcpy(&crec, dbuf.dptr, sizeof(crec));
-
- if (crec.cnum == -1)
+ if (crec->cnum == -1) {
return 0;
+ }
/* If the pid was not found delete the entry from connections.tdb */
- if (cs->Clear && !process_exists(crec.pid) && (errno == ESRCH)) {
- DEBUG(2,("pid %u doesn't exist - deleting connections %d [%s]\n",
- (unsigned int)crec.pid, crec.cnum, crec.name));
- if (tdb_delete(the_tdb, kbuf) != 0)
- DEBUG(0,("count_fn: tdb_delete failed with error %s\n", tdb_errorstr(tdb) ));
+ if (cs->Clear && !process_exists(crec->pid) && (errno == ESRCH)) {
+ NTSTATUS status;
+ DEBUG(2,("pid %s doesn't exist - deleting connections %d [%s]\n",
+ procid_str_static(&crec->pid), crec->cnum,
+ crec->servicename));
+
+ status = rec->delete_rec(rec);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("count_fn: tdb_delete failed with error %s\n",
+ nt_errstr(status)));
+ }
return 0;
}
-
- if (strequal(crec.name, cs->name))
+
+ if (cs->name) {
+ /* We are counting all the connections to a given share. */
+ if (strequal(crec->servicename, cs->name)) {
+ cs->curr_connections++;
+ }
+ } else {
+ /* We are counting all the connections. Static registrations
+ * like the lpq backgroud process and the smbd daemon process
+ * have a cnum of -1, so won't be counted here.
+ */
cs->curr_connections++;
+ }
return 0;
}
Claim an entry in the connections database.
****************************************************************************/
-BOOL claim_connection(connection_struct *conn,char *name,int max_connections,BOOL Clear)
+int count_current_connections( const char *sharename, BOOL clear )
{
- struct connections_key key;
- struct connections_data crec;
- TDB_DATA kbuf, dbuf;
+ struct count_stat cs;
- if (!tdb) {
- tdb = tdb_open_log(lock_path("connections.tdb"), 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
- O_RDWR | O_CREAT, 0644);
- }
- if (!tdb)
- return False;
+ cs.mypid = sys_getpid();
+ cs.curr_connections = 0;
+ cs.name = sharename;
+ cs.Clear = clear;
/*
- * Enforce the max connections parameter.
+ * This has a race condition, but locking the chain before hand is worse
+ * as it leads to deadlock.
*/
- if (max_connections > 0) {
- struct count_stat cs;
+ if (connections_forall(count_fn, &cs) == -1) {
+ DEBUG(0,("count_current_connections: traverse of "
+ "connections.tdb failed\n"));
+ DEBUGADD(0, ("count_current_connections: connection count of %d might not be accurate",
+ cs.curr_connections));
+ }
- cs.mypid = sys_getpid();
- cs.curr_connections = 0;
- cs.name = lp_servicename(SNUM(conn));
- cs.Clear = Clear;
+ /* If the traverse failed part-way through, we at least return
+ * as many connections as we had already counted. If it failed
+ * right at the start, we will return 0, which is about all we
+ * can do anywway.
+ */
- /*
- * This has a race condition, but locking the chain before hand is worse
- * as it leads to deadlock.
- */
+ return cs.curr_connections;
+}
- if (tdb_traverse(tdb, count_fn, &cs) == -1) {
- DEBUG(0,("claim_connection: traverse of connections.tdb failed with error %s.\n",
- tdb_errorstr(tdb) ));
- return False;
- }
+/****************************************************************************
+ Count the number of connections open across all shares.
+****************************************************************************/
- if (cs.curr_connections >= max_connections) {
- DEBUG(1,("claim_connection: Max connections (%d) exceeded for %s\n",
- max_connections, name ));
- return False;
- }
- }
+int count_all_current_connections(void)
+{
+ return count_current_connections(NULL, True /* clear stale entries */);
+}
+
+/****************************************************************************
+ Claim an entry in the connections database.
+****************************************************************************/
- DEBUG(5,("claiming %s %d\n",name,max_connections));
+BOOL claim_connection(connection_struct *conn, const char *name,
+ uint32 msg_flags)
+{
+ struct db_record *rec;
+ struct connections_data crec;
+ TDB_DATA dbuf;
+ NTSTATUS status;
- ZERO_STRUCT(key);
- key.pid = sys_getpid();
- key.cnum = conn?conn->cnum:-1;
- fstrcpy(key.name, name);
+ DEBUG(5,("claiming [%s]\n", name));
- kbuf.dptr = (char *)&key;
- kbuf.dsize = sizeof(key);
+ if (!(rec = connections_fetch_entry(NULL, conn, name))) {
+ DEBUG(0, ("connections_fetch_entry failed\n"));
+ return False;
+ }
/* fill in the crec */
ZERO_STRUCT(crec);
crec.magic = 0x280267;
- crec.pid = sys_getpid();
+ crec.pid = procid_self();
crec.cnum = conn?conn->cnum:-1;
if (conn) {
crec.uid = conn->uid;
crec.gid = conn->gid;
- StrnCpy(crec.name,
- lp_servicename(SNUM(conn)),sizeof(crec.name)-1);
+ strlcpy(crec.servicename, lp_servicename(SNUM(conn)),
+ sizeof(crec.servicename));
}
crec.start = time(NULL);
+ crec.bcast_msg_flags = msg_flags;
- StrnCpy(crec.machine,remote_machine,sizeof(crec.machine)-1);
- StrnCpy(crec.addr,conn?conn->client_address:client_addr(),sizeof(crec.addr)-1);
+ strlcpy(crec.machine,get_remote_machine_name(),sizeof(crec.machine));
+ strlcpy(crec.addr,conn?conn->client_address:client_addr(),
+ sizeof(crec.addr));
- dbuf.dptr = (char *)&crec;
+ dbuf.dptr = (uint8 *)&crec;
dbuf.dsize = sizeof(crec);
- if (tdb_store(tdb, kbuf, dbuf, TDB_REPLACE) != 0) {
+ status = rec->store(rec, dbuf, TDB_REPLACE);
+
+ TALLOC_FREE(rec);
+
+ if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("claim_connection: tdb_store failed with error %s.\n",
- tdb_errorstr(tdb) ));
+ nt_errstr(status)));
+ return False;
+ }
+
+ return True;
+}
+
+BOOL register_message_flags(BOOL doreg, uint32 msg_flags)
+{
+ struct db_record *rec;
+ struct connections_data *pcrec;
+ NTSTATUS status;
+
+ DEBUG(10,("register_message_flags: %s flags 0x%x\n",
+ doreg ? "adding" : "removing",
+ (unsigned int)msg_flags ));
+
+ if (!(rec = connections_fetch_entry(NULL, NULL, NULL))) {
+ DEBUG(0, ("connections_fetch_entry failed\n"));
+ return False;
+ }
+
+ if (rec->value.dsize != sizeof(struct connections_data)) {
+ DEBUG(0,("register_message_flags: Got wrong record size\n"));
+ TALLOC_FREE(rec);
+ return False;
+ }
+
+ pcrec = (struct connections_data *)rec->value.dptr;
+ if (doreg)
+ pcrec->bcast_msg_flags |= msg_flags;
+ else
+ pcrec->bcast_msg_flags &= ~msg_flags;
+
+ status = rec->store(rec, rec->value, TDB_REPLACE);
+
+ TALLOC_FREE(rec);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("register_message_flags: tdb_store failed: %s.\n",
+ nt_errstr(status)));
return False;
}
+ DEBUG(10,("register_message_flags: new flags 0x%x\n",
+ (unsigned int)pcrec->bcast_msg_flags ));
+
return True;
}
+
+/*********************************************************************
+*********************************************************************/
+
+static TDB_DATA* make_pipe_rec_key( struct pipe_open_rec *prec )
+{
+ TDB_DATA *kbuf = NULL;
+ fstring key_string;
+
+ if ( !prec )
+ return NULL;
+
+ if ( (kbuf = TALLOC_P(prec, TDB_DATA)) == NULL ) {
+ return NULL;
+ }
+
+ snprintf( key_string, sizeof(key_string), "%s/%d/%d",
+ prec->name, procid_to_pid(&prec->pid), prec->pnum );
+
+ *kbuf = string_term_tdb_data(talloc_strdup(prec, key_string));
+ if (kbuf->dptr == NULL )
+ return NULL;
+
+ return kbuf;
+}
+
+/*********************************************************************
+*********************************************************************/
+
+static void fill_pipe_open_rec( struct pipe_open_rec *prec, smb_np_struct *p )
+{
+ prec->pid = pid_to_procid(sys_getpid());
+ prec->pnum = p->pnum;
+ prec->uid = geteuid();
+ fstrcpy( prec->name, p->name );
+
+ return;
+}
+
+/*********************************************************************
+*********************************************************************/
+
+BOOL store_pipe_opendb( smb_np_struct *p )
+{
+ struct db_record *dbrec;
+ struct pipe_open_rec *prec;
+ TDB_DATA *key;
+ TDB_DATA data;
+ BOOL ret = False;
+
+ if ( (prec = TALLOC_P( NULL, struct pipe_open_rec)) == NULL ) {
+ DEBUG(0,("store_pipe_opendb: talloc failed!\n"));
+ return False;
+ }
+
+ fill_pipe_open_rec( prec, p );
+ if ( (key = make_pipe_rec_key( prec )) == NULL ) {
+ goto done;
+ }
+
+ data.dptr = (uint8 *)prec;
+ data.dsize = sizeof(struct pipe_open_rec);
+
+ if (!(dbrec = connections_fetch_record(prec, *key))) {
+ DEBUG(0, ("connections_fetch_record failed\n"));
+ goto done;
+ }
+
+ ret = NT_STATUS_IS_OK(dbrec->store(dbrec, data, TDB_REPLACE));
+
+done:
+ TALLOC_FREE( prec );
+ return ret;
+}
+
+/*********************************************************************
+*********************************************************************/
+
+BOOL delete_pipe_opendb( smb_np_struct *p )
+{
+ struct db_record *dbrec;
+ struct pipe_open_rec *prec;
+ TDB_DATA *key;
+ BOOL ret = False;
+
+ if ( (prec = TALLOC_P( NULL, struct pipe_open_rec)) == NULL ) {
+ DEBUG(0,("store_pipe_opendb: talloc failed!\n"));
+ return False;
+ }
+
+ fill_pipe_open_rec( prec, p );
+ if ( (key = make_pipe_rec_key( prec )) == NULL ) {
+ goto done;
+ }
+
+ if (!(dbrec = connections_fetch_record(prec, *key))) {
+ DEBUG(0, ("connections_fetch_record failed\n"));
+ goto done;
+ }
+
+ ret = NT_STATUS_IS_OK(dbrec->delete_rec(dbrec));
+
+done:
+ TALLOC_FREE( prec );
+ return ret;
+}
git.samba.org / sfrench / samba-autobuild / .git / blobdiff