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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/dpdk
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/dpdk')
-rwxr-xr-xsrc/plugins/dpdk/api/dpdk_api.c11
-rw-r--r--src/plugins/dpdk/device/cli.c6
-rw-r--r--src/plugins/dpdk/device/dpdk.h1
-rw-r--r--src/plugins/dpdk/device/init.c7
-rw-r--r--src/plugins/dpdk/main.c10
5 files changed, 20 insertions, 15 deletions
diff --git a/src/plugins/dpdk/api/dpdk_api.c b/src/plugins/dpdk/api/dpdk_api.c
index 97c4bc75721..5ff8d5f2f41 100755
--- a/src/plugins/dpdk/api/dpdk_api.c
+++ b/src/plugins/dpdk/api/dpdk_api.c
@@ -297,10 +297,6 @@ dpdk_api_init (vlib_main_t * vm)
dpdk_main_t *dm = &dpdk_main;
clib_error_t *error = 0;
- /* init CLI */
- if ((error = vlib_call_init_function (vm, dpdk_init)))
- return error;
-
u8 *name;
name = format (0, "dpdk_%08x%c", api_version, 0);
@@ -320,8 +316,11 @@ dpdk_api_init (vlib_main_t * vm)
return error;
}
-VLIB_INIT_FUNCTION (dpdk_api_init);
-
+/* *INDENT-OFF* */
+VLIB_INIT_FUNCTION (dpdk_api_init) =
+{
+ .runs_after = VLIB_INITS ("dpdk_init"),
+/* *INDENT-OFF* */
/*
* fd.io coding-style-patch-verification: ON
diff --git a/src/plugins/dpdk/device/cli.c b/src/plugins/dpdk/device/cli.c
index 765b298f8a9..04cf37f5304 100644
--- a/src/plugins/dpdk/device/cli.c
+++ b/src/plugins/dpdk/device/cli.c
@@ -1737,6 +1737,12 @@ VLIB_CLI_COMMAND (show_vpe_version_command, static) = {
};
/* *INDENT-ON* */
+/* Dummy function to get us linked in. */
+void
+dpdk_cli_reference (void)
+{
+}
+
clib_error_t *
dpdk_cli_init (vlib_main_t * vm)
{
diff --git a/src/plugins/dpdk/device/dpdk.h b/src/plugins/dpdk/device/dpdk.h
index bd9b35901d5..f79465cf8b4 100644
--- a/src/plugins/dpdk/device/dpdk.h
+++ b/src/plugins/dpdk/device/dpdk.h
@@ -512,6 +512,7 @@ clib_error_t *unformat_hqos (unformat_input_t * input,
struct rte_pci_device *dpdk_get_pci_device (const struct rte_eth_dev_info
*info);
+void dpdk_cli_reference (void);
#if CLI_DEBUG
int dpdk_buffer_validate_trajectory_all (u32 * uninitialized);
diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
index c83b2b57c4c..22ea659094b 100644
--- a/src/plugins/dpdk/device/init.c
+++ b/src/plugins/dpdk/device/init.c
@@ -1734,6 +1734,8 @@ dpdk_init (vlib_main_t * vm)
STATIC_ASSERT (RTE_CACHE_LINE_SIZE == 1 << CLIB_LOG2_CACHE_LINE_BYTES,
"DPDK RTE CACHE LINE SIZE does not match with 1<<CLIB_LOG2_CACHE_LINE_BYTES");
+ dpdk_cli_reference ();
+
dm->vlib_main = vm;
dm->vnet_main = vnet_get_main ();
dm->conf = &dpdk_config_main;
@@ -1751,10 +1753,6 @@ dpdk_init (vlib_main_t * vm)
dm->stat_poll_interval = DPDK_STATS_POLL_INTERVAL;
dm->link_state_poll_interval = DPDK_LINK_POLL_INTERVAL;
- /* init CLI */
- if ((error = vlib_call_init_function (vm, dpdk_cli_init)))
- return error;
-
dm->log_default = vlib_log_register_class ("dpdk", 0);
return error;
@@ -1762,7 +1760,6 @@ dpdk_init (vlib_main_t * vm)
VLIB_INIT_FUNCTION (dpdk_init);
-
/*
* fd.io coding-style-patch-verification: ON
*
diff --git a/src/plugins/dpdk/main.c b/src/plugins/dpdk/main.c
index d22b671e008..a1ea9e32c93 100644
--- a/src/plugins/dpdk/main.c
+++ b/src/plugins/dpdk/main.c
@@ -85,16 +85,18 @@ static clib_error_t * dpdk_main_init (vlib_main_t * vm)
dm->vlib_main = vm;
dm->vnet_main = vnet_get_main ();
- if ((error = vlib_call_init_function (vm, dpdk_init)))
- return error;
-
/* register custom delay function */
rte_delay_us_callback_register (rte_delay_us_override_cb);
return error;
}
-VLIB_INIT_FUNCTION (dpdk_main_init);
+/* *INDENT-OFF* */
+VLIB_INIT_FUNCTION (dpdk_main_init) =
+{
+ .runs_after = VLIB_INITS("dpdk_init"),
+};
+/* *INDENT-ON* */
clib_error_t *