summaryrefslogtreecommitdiffstats
path: root/src/vnet/ethernet
diff options
context:
space:
mode:
authorDave Barach <dave@barachs.net>2019-05-14 18:01:44 -0400
committerFlorin Coras <florin.coras@gmail.com>2019-05-16 16:11:23 +0000
commitf8d50682cd1245f6f5ce4c846ca6f1bdc11255a6 (patch)
tree8ecc60e4715db88bdbc8ea6bd0170fbae6f645eb /src/vnet/ethernet
parentc1f93067ed4b9954bbba82e2c9c104b22e2f7f33 (diff)
init / exit function ordering
The vlib init function subsystem now supports a mix of procedural and formally-specified ordering constraints. We should eliminate procedural knowledge wherever possible. The following schemes are *roughly* equivalent: static clib_error_t *init_runs_first (vlib_main_t *vm) { clib_error_t *error; ... do some stuff... if ((error = vlib_call_init_function (init_runs_next))) return error; ... } VLIB_INIT_FUNCTION (init_runs_first); and static clib_error_t *init_runs_first (vlib_main_t *vm) { ... do some stuff... } VLIB_INIT_FUNCTION (init_runs_first) = { .runs_before = VLIB_INITS("init_runs_next"), }; The first form will [most likely] call "init_runs_next" on the spot. The second form means that "init_runs_first" runs before "init_runs_next," possibly much earlier in the sequence. Please DO NOT construct sets of init functions where A before B actually means A *right before* B. It's not necessary - simply combine A and B - and it leads to hugely annoying debugging exercises when trying to switch from ad-hoc procedural ordering constraints to formal ordering constraints. Change-Id: I5e4353503bf43b4acb11a45fb33c79a5ade8426c Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/vnet/ethernet')
-rw-r--r--src/vnet/ethernet/arp.c12
-rw-r--r--src/vnet/ethernet/ethernet.h1
-rw-r--r--src/vnet/ethernet/init.c35
-rwxr-xr-xsrc/vnet/ethernet/node.c10
4 files changed, 28 insertions, 30 deletions
diff --git a/src/vnet/ethernet/arp.c b/src/vnet/ethernet/arp.c
index 12c3fa47eac..f294893d846 100644
--- a/src/vnet/ethernet/arp.c
+++ b/src/vnet/ethernet/arp.c
@@ -1761,12 +1761,8 @@ ethernet_arp_init (vlib_main_t * vm)
{
ethernet_arp_main_t *am = &ethernet_arp_main;
ip4_main_t *im = &ip4_main;
- clib_error_t *error;
pg_node_t *pn;
- if ((error = vlib_call_init_function (vm, ethernet_init)))
- return error;
-
ethernet_register_input_type (vm, ETHERNET_TYPE_ARP, arp_input_node.index);
pn = pg_get_node (arp_input_node.index);
@@ -1809,8 +1805,12 @@ ethernet_arp_init (vlib_main_t * vm)
return 0;
}
-
-VLIB_INIT_FUNCTION (ethernet_arp_init);
+/* *INDENT-OFF* */
+VLIB_INIT_FUNCTION (ethernet_arp_init) =
+{
+ .runs_after = VLIB_INITS("ethernet_init"),
+};
+/* *INDENT-ON* */
static void
arp_entry_free (ethernet_arp_interface_t * eai, ethernet_arp_ip4_entry_t * e)
diff --git a/src/vnet/ethernet/ethernet.h b/src/vnet/ethernet/ethernet.h
index 94322a715f9..344705b0cc3 100644
--- a/src/vnet/ethernet/ethernet.h
+++ b/src/vnet/ethernet/ethernet.h
@@ -544,6 +544,7 @@ u8 *ethernet_build_rewrite (vnet_main_t * vnm,
vnet_link_t link_type, const void *dst_address);
const u8 *ethernet_ip4_mcast_dst_addr (void);
const u8 *ethernet_ip6_mcast_dst_addr (void);
+void ethernet_input_init (vlib_main_t * vm, ethernet_main_t * em);
extern vlib_node_registration_t ethernet_input_node;
diff --git a/src/vnet/ethernet/init.c b/src/vnet/ethernet/init.c
index 5d10c60fd5f..9fd95f1b75a 100644
--- a/src/vnet/ethernet/init.c
+++ b/src/vnet/ethernet/init.c
@@ -83,14 +83,6 @@ static clib_error_t *
ethernet_init (vlib_main_t * vm)
{
ethernet_main_t *em = &ethernet_main;
- clib_error_t *error;
-
- /*
- * Set up the L2 path now, or we'll wipe out the L2 ARP
- * registration set up by ethernet_arp_init.
- */
- if ((error = vlib_call_init_function (vm, l2_init)))
- return error;
em->vlib_main = vm;
@@ -101,17 +93,28 @@ ethernet_init (vlib_main_t * vm)
#include "types.def"
#undef ethernet_type
- if ((error = vlib_call_init_function (vm, llc_init)))
- return error;
- if ((error = vlib_call_init_function (vm, ethernet_input_init)))
- return error;
- if ((error = vlib_call_init_function (vm, vnet_feature_init)))
- return error;
-
+ /*
+ * ethernet_input_init is effectively part of this function.
+ * Simply ensuring that it happens after we set up the hash tables
+ * is not sufficient.
+ */
+ ethernet_input_init (vm, em);
return 0;
}
-VLIB_INIT_FUNCTION (ethernet_init);
+/* *INDENT-OFF* */
+VLIB_INIT_FUNCTION (ethernet_init) =
+{
+ /*
+ * Set up the L2 path before ethernet_init, or we'll wipe out the L2 ARP
+ * registration set up by ethernet_arp_init.
+ */
+ .init_order = VLIB_INITS("l2_init",
+ "ethernet_init",
+ "llc_init",
+ "vnet_feature_init"),
+};
+/* *INDENT-ON* */
ethernet_main_t *
ethernet_get_main (vlib_main_t * vm)
diff --git a/src/vnet/ethernet/node.c b/src/vnet/ethernet/node.c
index 87c447f44d3..286ec3c0e78 100755
--- a/src/vnet/ethernet/node.c
+++ b/src/vnet/ethernet/node.c
@@ -2025,11 +2025,9 @@ next_by_ethertype_register (next_by_ethertype_t * l3_next,
return 0;
}
-
-static clib_error_t *
-ethernet_input_init (vlib_main_t * vm)
+void
+ethernet_input_init (vlib_main_t * vm, ethernet_main_t * em)
{
- ethernet_main_t *em = &ethernet_main;
__attribute__ ((unused)) vlan_table_t *invalid_vlan_table;
__attribute__ ((unused)) qinq_table_t *invalid_qinq_table;
@@ -2048,12 +2046,8 @@ ethernet_input_init (vlib_main_t * vm)
pool_get (em->vlan_pool, invalid_vlan_table); // first id = 0
// The first qinq pool will always be reserved for an invalid table
pool_get (em->qinq_pool, invalid_qinq_table); // first id = 0
-
- return 0;
}
-VLIB_INIT_FUNCTION (ethernet_input_init);
-
void
ethernet_register_input_type (vlib_main_t * vm,
ethernet_type_t type, u32 node_index)