From f8d50682cd1245f6f5ce4c846ca6f1bdc11255a6 Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Tue, 14 May 2019 18:01:44 -0400 Subject: 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 --- src/plugins/dpdk/api/dpdk_api.c | 11 +++++------ src/plugins/dpdk/device/cli.c | 6 ++++++ src/plugins/dpdk/device/dpdk.h | 1 + src/plugins/dpdk/device/init.c | 7 ++----- src/plugins/dpdk/main.c | 10 ++++++---- 5 files changed, 20 insertions(+), 15 deletions(-) (limited to 'src/plugins/dpdk') 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<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 * -- cgit 1.2.3-korg