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authorMatthew Smith <mgsmith@netgate.com>2018-02-10 11:11:45 -0600
committerDave Barach <openvpp@barachs.net>2018-02-12 19:34:17 +0000
commit7a1928342109cd05cccf9969e61b5fe8f00a18cf (patch)
treeb1b618b07d620fee5ba06ca4222d97668cfb8f10 /src/vnet/dhcp
parent18b631560b17d5fd143c87d77f86a371cb93e6d8 (diff)
Fix DHCP client crash with worker threads
Crash occurring With a worker thread configured and dhcp client active on an interface. When a DHCP reply packet is received, call to ethernet_get_main() from dhcp_proxy_to_client_input() was causing a crash. Replaced with a call to vnet_get_ethernet_main(). Once that was resolved, calling dhcp_client_acquire_address() from a worker thread also caused a crash. Changed so the main thread will do the address/route configuration. Change-Id: Ib23984787102dea8cf6cfcde86188a751f15c1e1 Signed-off-by: Matthew Smith <mgsmith@netgate.com>
Diffstat (limited to 'src/vnet/dhcp')
-rw-r--r--src/vnet/dhcp/client.c103
-rw-r--r--src/vnet/dhcp/dhcp4_proxy_node.c2
-rw-r--r--src/vnet/dhcp/dhcp6_proxy_node.c2
3 files changed, 56 insertions, 51 deletions
diff --git a/src/vnet/dhcp/client.c b/src/vnet/dhcp/client.c
index 03fc2689abf..511b23cb248 100644
--- a/src/vnet/dhcp/client.c
+++ b/src/vnet/dhcp/client.c
@@ -66,6 +66,58 @@ dhcp_client_proc_callback (uword * client_index)
EVENT_DHCP_CLIENT_WAKEUP, *client_index);
}
+static void
+dhcp_client_addr_callback (dhcp_client_t * c)
+{
+ dhcp_client_main_t *dcm = &dhcp_client_main;
+ void (*fp) (u32, u32, u8 *, u8, u8, u8 *, u8 *, u8 *) = c->event_callback;
+
+ /* add the advertised subnet and disable the feature */
+ dhcp_client_acquire_address (dcm, c);
+ vnet_feature_enable_disable ("ip4-unicast",
+ "ip4-dhcp-client-detect",
+ c->sw_if_index, 0, 0, 0);
+
+ /*
+ * Configure default IP route:
+ */
+ if (c->router_address.as_u32)
+ {
+ fib_prefix_t all_0s = {
+ .fp_len = 0,
+ .fp_addr.ip4.as_u32 = 0x0,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ };
+ ip46_address_t nh = {
+ .ip4 = c->router_address,
+ };
+
+ /* *INDENT-OFF* */
+ fib_table_entry_path_add (
+ fib_table_get_index_for_sw_if_index (
+ FIB_PROTOCOL_IP4,
+ c->sw_if_index),
+ &all_0s,
+ FIB_SOURCE_DHCP,
+ FIB_ENTRY_FLAG_NONE,
+ DPO_PROTO_IP4,
+ &nh, c->sw_if_index,
+ ~0, 1, NULL, // no label stack
+ FIB_ROUTE_PATH_FLAG_NONE);
+ /* *INDENT-ON* */
+ }
+
+ /*
+ * Call the user's event callback to report DHCP information
+ */
+ if (fp)
+ (*fp) (c->client_index, /* clinet index */
+ c->pid, c->hostname, c->subnet_mask_width, 0, /* is_ipv6 */
+ (u8 *) & c->leased_address, /* host IP address */
+ (u8 *) & c->router_address, /* router IP address */
+ (u8 *) (c->l2_rewrite + 6)); /* host MAC address */
+}
+
/*
* dhcp_client_for_us - server-to-client callback.
* Called from proxy_node.c:dhcp_proxy_to_client_input().
@@ -206,55 +258,8 @@ dhcp_client_for_us (u32 bi, vlib_buffer_t * b,
}
/* OK, we own the address (etc), add to the routing table(s) */
if (c->state == DHCP_REQUEST)
- {
- void (*fp) (u32, u32, u8 *, u8, u8, u8 *, u8 *, u8 *) =
- c->event_callback;
-
- /* add the advertised subnet and disable the feature */
- dhcp_client_acquire_address (dcm, c);
- vnet_feature_enable_disable ("ip4-unicast",
- "ip4-dhcp-client-detect",
- c->sw_if_index, 0, 0, 0);
-
- /*
- * Configure default IP route:
- */
- if (c->router_address.as_u32)
- {
- fib_prefix_t all_0s = {
- .fp_len = 0,
- .fp_addr.ip4.as_u32 = 0x0,
- .fp_proto = FIB_PROTOCOL_IP4,
- };
- ip46_address_t nh = {
- .ip4 = c->router_address,
- };
-
- /* *INDENT-OFF* */
- fib_table_entry_path_add (
- fib_table_get_index_for_sw_if_index (
- FIB_PROTOCOL_IP4,
- c->sw_if_index),
- &all_0s,
- FIB_SOURCE_DHCP,
- FIB_ENTRY_FLAG_NONE,
- DPO_PROTO_IP4,
- &nh, c->sw_if_index,
- ~0, 1, NULL, // no label stack
- FIB_ROUTE_PATH_FLAG_NONE);
- /* *INDENT-ON* */
- }
-
- /*
- * Call the user's event callback to report DHCP information
- */
- if (fp)
- (*fp) (c->client_index, /* clinet index */
- c->pid, c->hostname, c->subnet_mask_width, 0, /* is_ipv6 */
- (u8 *) & c->leased_address, /* host IP address */
- (u8 *) & c->router_address, /* router IP address */
- (u8 *) (c->l2_rewrite + 6)); /* host MAC address */
- }
+ vl_api_rpc_call_main_thread (dhcp_client_addr_callback,
+ (u8 *) c, sizeof (*c));
c->state = DHCP_BOUND;
c->retry_count = 0;
diff --git a/src/vnet/dhcp/dhcp4_proxy_node.c b/src/vnet/dhcp/dhcp4_proxy_node.c
index e84d72c0afb..6b15c51b38f 100644
--- a/src/vnet/dhcp/dhcp4_proxy_node.c
+++ b/src/vnet/dhcp/dhcp4_proxy_node.c
@@ -477,7 +477,7 @@ dhcp_proxy_to_client_input (vlib_main_t * vm,
vlib_frame_t * from_frame)
{
u32 n_left_from, *from;
- ethernet_main_t *em = ethernet_get_main (vm);
+ ethernet_main_t *em = vnet_get_ethernet_main ();
dhcp_proxy_main_t *dpm = &dhcp_proxy_main;
vnet_main_t *vnm = vnet_get_main ();
ip4_main_t *im = &ip4_main;
diff --git a/src/vnet/dhcp/dhcp6_proxy_node.c b/src/vnet/dhcp/dhcp6_proxy_node.c
index 5a3a99e2e5d..2a1ac12e535 100644
--- a/src/vnet/dhcp/dhcp6_proxy_node.c
+++ b/src/vnet/dhcp/dhcp6_proxy_node.c
@@ -563,7 +563,7 @@ dhcpv6_proxy_to_client_input (vlib_main_t * vm,
{
u32 n_left_from, *from;
- ethernet_main_t *em = ethernet_get_main (vm);
+ ethernet_main_t *em = vnet_get_ethernet_main ();
dhcp_proxy_main_t *dm = &dhcp_proxy_main;
dhcp_proxy_t *proxy;
dhcp_server_t *server;