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-rw-r--r--fs/dlm/config.c34
-rw-r--r--fs/dlm/lowcomms.c2
-rw-r--r--fs/dlm/lowcomms.h3
3 files changed, 36 insertions, 3 deletions
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 8439610c266a..88d95d96e36c 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -164,6 +164,36 @@ static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \
} \
CONFIGFS_ATTR(cluster_, name);
+static int dlm_check_protocol_and_dlm_running(unsigned int x)
+{
+ switch (x) {
+ case 0:
+ /* TCP */
+ break;
+ case 1:
+ /* SCTP */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (dlm_allow_conn)
+ return -EBUSY;
+
+ return 0;
+}
+
+static int dlm_check_zero_and_dlm_running(unsigned int x)
+{
+ if (!x)
+ return -EINVAL;
+
+ if (dlm_allow_conn)
+ return -EBUSY;
+
+ return 0;
+}
+
static int dlm_check_zero(unsigned int x)
{
if (!x)
@@ -180,7 +210,7 @@ static int dlm_check_buffer_size(unsigned int x)
return 0;
}
-CLUSTER_ATTR(tcp_port, dlm_check_zero);
+CLUSTER_ATTR(tcp_port, dlm_check_zero_and_dlm_running);
CLUSTER_ATTR(buffer_size, dlm_check_buffer_size);
CLUSTER_ATTR(rsbtbl_size, dlm_check_zero);
CLUSTER_ATTR(recover_timer, dlm_check_zero);
@@ -188,7 +218,7 @@ CLUSTER_ATTR(toss_secs, dlm_check_zero);
CLUSTER_ATTR(scan_secs, dlm_check_zero);
CLUSTER_ATTR(log_debug, NULL);
CLUSTER_ATTR(log_info, NULL);
-CLUSTER_ATTR(protocol, NULL);
+CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running);
CLUSTER_ATTR(mark, NULL);
CLUSTER_ATTR(timewarn_cs, dlm_check_zero);
CLUSTER_ATTR(waitwarn_us, NULL);
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index ca9bf54b94a9..4f2245e8677f 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -135,7 +135,7 @@ static DEFINE_SPINLOCK(dlm_node_addrs_spin);
static struct listen_connection listen_con;
static struct sockaddr_storage *dlm_local_addr[DLM_MAX_ADDR_COUNT];
static int dlm_local_count;
-static int dlm_allow_conn;
+int dlm_allow_conn;
/* Work queues */
static struct workqueue_struct *recv_workqueue;
diff --git a/fs/dlm/lowcomms.h b/fs/dlm/lowcomms.h
index 790d6703b17e..bcd4dbd1dc98 100644
--- a/fs/dlm/lowcomms.h
+++ b/fs/dlm/lowcomms.h
@@ -14,6 +14,9 @@
#define LOWCOMMS_MAX_TX_BUFFER_LEN 4096
+/* switch to check if dlm is running */
+extern int dlm_allow_conn;
+
int dlm_lowcomms_start(void);
void dlm_lowcomms_stop(void);
void dlm_lowcomms_exit(void);