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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/plugins/cdp/cdp_input.c
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/plugins/cdp/cdp_input.c')
-rw-r--r--src/plugins/cdp/cdp_input.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/src/plugins/cdp/cdp_input.c b/src/plugins/cdp/cdp_input.c
index 946aaf7f845..dbe179ad095 100644
--- a/src/plugins/cdp/cdp_input.c
+++ b/src/plugins/cdp/cdp_input.c
@@ -408,15 +408,11 @@ cdp_input (vlib_main_t * vm, vlib_buffer_t * b0, u32 bi0)
static clib_error_t *
cdp_input_init (vlib_main_t * vm)
{
- clib_error_t *error;
cdp_main_t *cm = &cdp_main;
void vnet_cdp_node_reference (void);
vnet_cdp_node_reference ();
- if ((error = vlib_call_init_function (vm, cdp_periodic_init)))
- return error;
-
cm->vlib_main = vm;
cm->vnet_main = vnet_get_main ();
cm->neighbor_by_sw_if_index = hash_create (0, sizeof (uword));
@@ -424,7 +420,12 @@ cdp_input_init (vlib_main_t * vm)
return 0;
}
-VLIB_INIT_FUNCTION (cdp_input_init);
+/* *INDENT-OFF* */
+VLIB_INIT_FUNCTION (cdp_input_init) =
+{
+ .runs_after = VLIB_INITS("cdp_periodic_init"),
+};
+/* *INDENT-ON* */
static u8 *