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-rw-r--r--source3/include/local.h8
-rw-r--r--source3/lib/server_mutex.c6
-rw-r--r--source3/nsswitch/winbindd_cm.c69
-rw-r--r--source3/passdb/secrets.c32
4 files changed, 77 insertions, 38 deletions
diff --git a/source3/include/local.h b/source3/include/local.h
index 20fa5ff52a..bf828b5894 100644
--- a/source3/include/local.h
+++ b/source3/include/local.h
@@ -216,4 +216,12 @@
/* Max number of open RPC pipes. */
#define MAX_OPEN_PIPES 2048
+/* Tuning for server auth mutex. */
+#define CLI_AUTH_TIMEOUT 5000 /* In milli-seconds. */
+#define NUM_CLI_AUTH_CONNECT_RETRIES 3
+/* Number in seconds to wait for the mutex. This must be less than 30 seconds. */
+#define SERVER_MUTEX_WAIT_TIME ( ((NUM_CLI_AUTH_CONNECT_RETRIES) * ((CLI_AUTH_TIMEOUT)/1000)) + 5)
+/* Number in seconds for winbindd to wait for the mutex. Make this 2 * smbd wait time. */
+#define WINBIND_SERVER_MUTEX_WAIT_TIME (( ((NUM_CLI_AUTH_CONNECT_RETRIES) * ((CLI_AUTH_TIMEOUT)/1000)) + 5)*2)
+
#endif
diff --git a/source3/lib/server_mutex.c b/source3/lib/server_mutex.c
index 3e5512c734..878e5497d8 100644
--- a/source3/lib/server_mutex.c
+++ b/source3/lib/server_mutex.c
@@ -30,6 +30,8 @@
like the single-connection that NT makes. */
static char *mutex_server_name;
+/* FIXME. ref_count should be allocated per name... JRA. */
+size_t ref_count;
BOOL grab_server_mutex(const char *name)
{
@@ -38,7 +40,7 @@ BOOL grab_server_mutex(const char *name)
DEBUG(0,("grab_server_mutex: malloc failed for %s\n", name));
return False;
}
- if (!secrets_named_mutex(mutex_server_name, 10)) {
+ if (!secrets_named_mutex(mutex_server_name, 10, &ref_count)) {
DEBUG(10,("grab_server_mutex: failed for %s\n", name));
SAFE_FREE(mutex_server_name);
return False;
@@ -50,7 +52,7 @@ BOOL grab_server_mutex(const char *name)
void release_server_mutex(void)
{
if (mutex_server_name) {
- secrets_named_mutex_release(mutex_server_name);
+ secrets_named_mutex_release(mutex_server_name, &ref_count);
SAFE_FREE(mutex_server_name);
}
}
diff --git a/source3/nsswitch/winbindd_cm.c b/source3/nsswitch/winbindd_cm.c
index 1105c77572..54096c0c1d 100644
--- a/source3/nsswitch/winbindd_cm.c
+++ b/source3/nsswitch/winbindd_cm.c
@@ -72,6 +72,7 @@ struct winbindd_cm_conn {
fstring domain;
fstring controller;
fstring pipe_name;
+ size_t mutex_ref_count;
struct cli_state *cli;
POLICY_HND pol;
};
@@ -301,7 +302,7 @@ static void add_failed_connection_entry(struct winbindd_cm_conn *new_conn,
/* Open a connction to the remote server, cache failures for 30 seconds */
static NTSTATUS cm_open_connection(const char *domain, const int pipe_index,
- struct winbindd_cm_conn *new_conn)
+ struct winbindd_cm_conn *new_conn, BOOL keep_mutex)
{
struct failed_connection_cache *fcc;
NTSTATUS result;
@@ -309,6 +310,7 @@ static NTSTATUS cm_open_connection(const char *domain, const int pipe_index,
struct in_addr dc_ip;
int i;
BOOL retry = True;
+ BOOL got_mutex = False;
ZERO_STRUCT(dc_ip);
@@ -365,12 +367,23 @@ static NTSTATUS cm_open_connection(const char *domain, const int pipe_index,
for (i = 0; retry && (i < 3); i++) {
+ if (!secrets_named_mutex(new_conn->controller, WINBIND_SERVER_MUTEX_WAIT_TIME, &new_conn->mutex_ref_count)) {
+ DEBUG(0,("cm_open_connection: mutex grab failed for %s\n", new_conn->controller));
+ result = NT_STATUS_POSSIBLE_DEADLOCK;
+ continue;
+ }
+
+ got_mutex = True;
+
result = cli_full_connection(&new_conn->cli, global_myname(), new_conn->controller,
&dc_ip, 0, "IPC$", "IPC", ipc_username, ipc_domain,
ipc_password, 0, &retry);
if (NT_STATUS_IS_OK(result))
break;
+
+ secrets_named_mutex_release(new_conn->controller, &new_conn->mutex_ref_count);
+ got_mutex = False;
}
SAFE_FREE(ipc_username);
@@ -378,6 +391,8 @@ static NTSTATUS cm_open_connection(const char *domain, const int pipe_index,
SAFE_FREE(ipc_password);
if (!NT_STATUS_IS_OK(result)) {
+ if (got_mutex)
+ secrets_named_mutex_release(new_conn->controller, &new_conn->mutex_ref_count);
add_failed_connection_entry(new_conn, result);
return result;
}
@@ -392,12 +407,16 @@ static NTSTATUS cm_open_connection(const char *domain, const int pipe_index,
* if the PDC is an NT4 box. but since there is only one 2k
* specific UUID right now, i'm not going to bother. --jerry
*/
+ if (got_mutex)
+ secrets_named_mutex_release(new_conn->controller, &new_conn->mutex_ref_count);
if ( !is_win2k_pipe(pipe_index) )
add_failed_connection_entry(new_conn, result);
cli_shutdown(new_conn->cli);
return result;
}
+ if ((got_mutex) && !keep_mutex)
+ secrets_named_mutex_release(new_conn->controller, &new_conn->mutex_ref_count);
return NT_STATUS_OK;
}
@@ -435,7 +454,8 @@ static BOOL connection_ok(struct winbindd_cm_conn *conn)
/* Get a connection to the remote DC and open the pipe. If there is already a connection, use that */
-static NTSTATUS get_connection_from_cache(const char *domain, const char *pipe_name, struct winbindd_cm_conn **conn_out)
+static NTSTATUS get_connection_from_cache(const char *domain, const char *pipe_name,
+ struct winbindd_cm_conn **conn_out, BOOL keep_mutex)
{
struct winbindd_cm_conn *conn, conn_temp;
NTSTATUS result;
@@ -452,6 +472,12 @@ static NTSTATUS get_connection_from_cache(const char *domain, const char *pipe_n
SAFE_FREE(conn);
conn = &conn_temp; /* Just to keep the loop moving */
} else {
+ if (keep_mutex) {
+ if (!secrets_named_mutex(conn->controller,
+ WINBIND_SERVER_MUTEX_WAIT_TIME, &conn->mutex_ref_count))
+ DEBUG(0,("get_connection_from_cache: mutex grab failed for %s\n",
+ conn->controller));
+ }
break;
}
}
@@ -463,7 +489,7 @@ static NTSTATUS get_connection_from_cache(const char *domain, const char *pipe_n
ZERO_STRUCTP(conn);
- if (!NT_STATUS_IS_OK(result = cm_open_connection(domain, get_pipe_index(pipe_name), conn))) {
+ if (!NT_STATUS_IS_OK(result = cm_open_connection(domain, get_pipe_index(pipe_name), conn, keep_mutex))) {
DEBUG(3, ("Could not open a connection to %s for %s (%s)\n",
domain, pipe_name, nt_errstr(result)));
SAFE_FREE(conn);
@@ -491,7 +517,7 @@ BOOL cm_check_for_native_mode_win2k( const char *domain )
ZERO_STRUCT( ctr );
- if ( !NT_STATUS_IS_OK(result = cm_open_connection(domain, PI_LSARPC_DS, &conn)) ) {
+ if ( !NT_STATUS_IS_OK(result = cm_open_connection(domain, PI_LSARPC_DS, &conn, False)) ) {
DEBUG(5, ("cm_check_for_native_mode_win2k: Could not open a connection to %s for PIPE_LSARPC (%s)\n",
domain, nt_errstr(result)));
return False;
@@ -529,7 +555,7 @@ CLI_POLICY_HND *cm_get_lsa_handle(const char *domain)
/* Look for existing connections */
- if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_LSARPC, &conn)))
+ if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_LSARPC, &conn, False)))
return NULL;
/* This *shitty* code needs scrapping ! JRA */
@@ -545,7 +571,7 @@ CLI_POLICY_HND *cm_get_lsa_handle(const char *domain)
if (!NT_STATUS_IS_OK(result)) {
/* Hit the cache code again. This cleans out the old connection and gets a new one */
if (conn->cli->fd == -1) { /* Try again, if the remote host disapeared */
- if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_LSARPC, &conn)))
+ if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_LSARPC, &conn, False)))
return NULL;
result = cli_lsa_open_policy(conn->cli, conn->cli->mem_ctx, False,
@@ -577,7 +603,7 @@ CLI_POLICY_HND *cm_get_sam_handle(char *domain)
/* Look for existing connections */
- if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_SAMR, &conn)))
+ if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_SAMR, &conn, False)))
return NULL;
/* This *shitty* code needs scrapping ! JRA */
@@ -592,7 +618,7 @@ CLI_POLICY_HND *cm_get_sam_handle(char *domain)
if (!NT_STATUS_IS_OK(result)) {
/* Hit the cache code again. This cleans out the old connection and gets a new one */
if (conn->cli->fd == -1) { /* Try again, if the remote host disapeared */
- if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_SAMR, &conn)))
+ if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_SAMR, &conn, False)))
return NULL;
result = cli_samr_connect(conn->cli, conn->cli->mem_ctx,
@@ -849,28 +875,19 @@ NTSTATUS cm_get_netlogon_cli(const char *domain, const unsigned char *trust_pass
NTSTATUS result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
struct winbindd_cm_conn *conn;
uint32 neg_flags = 0x000001ff;
- fstring srv_name;
- struct in_addr dc_ip;
if (!cli)
return NT_STATUS_INVALID_PARAMETER;
- if (!cm_get_dc_name(domain, srv_name, &dc_ip))
- return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
+ /* Open an initial conection - keep the mutex. */
- if (!secrets_named_mutex(srv_name, 10)) {
- DEBUG(0,("cm_get_netlogon_cli: mutex grab failed for %s\n", srv_name));
- return NT_STATUS_POSSIBLE_DEADLOCK;
- }
-
- /* Open an initial conection */
-
- if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_NETLOGON, &conn)))
+ if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_NETLOGON, &conn, True)))
return result;
result = cli_nt_setup_creds(conn->cli, get_sec_chan(), trust_passwd, &neg_flags, 2);
- secrets_named_mutex_release(srv_name);
+ if (conn->mutex_ref_count)
+ secrets_named_mutex_release(conn->controller, &conn->mutex_ref_count);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(0, ("error connecting to domain password server: %s\n",
@@ -879,18 +896,14 @@ NTSTATUS cm_get_netlogon_cli(const char *domain, const unsigned char *trust_pass
/* Hit the cache code again. This cleans out the old connection and gets a new one */
if (conn->cli->fd == -1) {
- if (!secrets_named_mutex(srv_name, 10)) {
- DEBUG(0,("cm_get_netlogon_cli: mutex grab failed for %s\n", srv_name));
- return NT_STATUS_POSSIBLE_DEADLOCK;
- }
-
- if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_NETLOGON, &conn)))
+ if (!NT_STATUS_IS_OK(result = get_connection_from_cache(domain, PIPE_NETLOGON, &conn, True)))
return result;
/* Try again */
result = cli_nt_setup_creds( conn->cli, get_sec_chan(),trust_passwd, &neg_flags, 2);
- secrets_named_mutex_release(srv_name);
+ if (conn->mutex_ref_count)
+ secrets_named_mutex_release(conn->controller, &conn->mutex_ref_count);
}
if (!NT_STATUS_IS_OK(result)) {
diff --git a/source3/passdb/secrets.c b/source3/passdb/secrets.c
index 5ba9f1dc1e..a52e264270 100644
--- a/source3/passdb/secrets.c
+++ b/source3/passdb/secrets.c
@@ -588,17 +588,24 @@ NTSTATUS secrets_get_trusted_domains(TALLOC_CTX* ctx, int* enum_ctx, int max_num
between smbd instances.
*******************************************************************************/
-BOOL secrets_named_mutex(const char *name, unsigned int timeout)
+BOOL secrets_named_mutex(const char *name, unsigned int timeout, size_t *p_ref_count)
{
- int ret;
+ size_t ref_count = *p_ref_count;
+ int ret = 0;
if (!message_init())
return False;
- ret = tdb_lock_bystring(tdb, name, timeout);
- if (ret == 0)
- DEBUG(10,("secrets_named_mutex: got mutex for %s\n", name ));
+ if (ref_count == 0) {
+ ret = tdb_lock_bystring(tdb, name, timeout);
+ if (ret == 0)
+ DEBUG(10,("secrets_named_mutex: got mutex for %s\n", name ));
+ }
+ if (ret == 0) {
+ *p_ref_count = ++ref_count;
+ DEBUG(10,("secrets_named_mutex: ref_count for mutex %s = %u\n", name, (unsigned int)ref_count ));
+ }
return (ret == 0);
}
@@ -606,10 +613,19 @@ BOOL secrets_named_mutex(const char *name, unsigned int timeout)
Unlock a named mutex.
*******************************************************************************/
-void secrets_named_mutex_release(const char *name)
+void secrets_named_mutex_release(const char *name, size_t *p_ref_count)
{
- tdb_unlock_bystring(tdb, name);
- DEBUG(10,("secrets_named_mutex: released mutex for %s\n", name ));
+ size_t ref_count = *p_ref_count;
+
+ SMB_ASSERT(ref_count != 0);
+
+ if (ref_count == 1) {
+ tdb_unlock_bystring(tdb, name);
+ DEBUG(10,("secrets_named_mutex: released mutex for %s\n", name ));
+ }
+
+ *p_ref_count = --ref_count;
+ DEBUG(10,("secrets_named_mutex_release: ref_count for mutex %s = %u\n", name, (unsigned int)ref_count ));
}
/*********************************************************
generated by cgit (git 2.34.1) at 2024-11-02 05:52:41 +0000