From 69128d0209ba6108430dca9cc78ab36a9b1c793e Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Tue, 26 Sep 2017 10:54:34 -0400 Subject: Add thread-safe event signaller, use RPC where required Update ping code to use the new function Change-Id: Ieb753b23f8402cbe5667c22747896784c8ece937 Signed-off-by: Florin Coras Signed-off-by: Dave Barach --- src/vlib/node_funcs.h | 23 +++++++++++++++++++++++ src/vlib/threads.c | 24 +++++++++++++++++++++++- src/vlib/threads.h | 14 +++++++++++++- src/vlibmemory/memory_vlib.c | 13 ++++++++++++- src/vnet/ip/ping.c | 4 ++-- 5 files changed, 73 insertions(+), 5 deletions(-) (limited to 'src') diff --git a/src/vlib/node_funcs.h b/src/vlib/node_funcs.h index 3ae4e541a68..0734476cb8f 100644 --- a/src/vlib/node_funcs.h +++ b/src/vlib/node_funcs.h @@ -965,6 +965,29 @@ vlib_process_signal_event_pointer (vlib_main_t * vm, d[0] = data; } +/** + * Signal event to process from any thread. + * + * When in doubt, use this. + */ +always_inline void +vlib_process_signal_event_mt (vlib_main_t * vm, + uword node_index, uword type_opaque, uword data) +{ + if (vlib_get_thread_index () != 0) + { + vlib_process_signal_event_mt_args_t args = { + .node_index = node_index, + .type_opaque = type_opaque, + .data = data, + }; + vlib_rpc_call_main_thread (vlib_process_signal_event_mt_helper, + (u8 *) & args, sizeof (args)); + } + else + vlib_process_signal_event (vm, node_index, type_opaque, data); +} + always_inline void vlib_process_signal_one_time_event (vlib_main_t * vm, uword node_index, diff --git a/src/vlib/threads.c b/src/vlib/threads.c index f9c7043c63d..be8daa64c0a 100644 --- a/src/vlib/threads.c +++ b/src/vlib/threads.c @@ -1767,7 +1767,6 @@ vlib_frame_queue_main_init (u32 node_index, u32 frame_queue_nelts) return (fqm - tm->frame_queue_mains); } - int vlib_thread_cb_register (struct vlib_main_t *vm, vlib_thread_callbacks_t * cb) { @@ -1781,6 +1780,29 @@ vlib_thread_cb_register (struct vlib_main_t *vm, vlib_thread_callbacks_t * cb) return 0; } +void +vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t * + args) +{ + ASSERT (vlib_get_thread_index () == 0); + vlib_process_signal_event (vlib_get_main (), args->node_index, + args->type_opaque, args->data); +} + +void *rpc_call_main_thread_cb_fn; + +void +vlib_rpc_call_main_thread (void *callback, u8 * args, u32 arg_size) +{ + if (rpc_call_main_thread_cb_fn) + { + void (*fp) (void *, u8 *, u32) = rpc_call_main_thread_cb_fn; + (*fp) (callback, args, arg_size); + } + else + clib_warning ("BUG: rpc_call_main_thread_cb_fn NULL!"); +} + clib_error_t * threads_init (vlib_main_t * vm) { diff --git a/src/vlib/threads.h b/src/vlib/threads.h index 72340ee1a37..8931584b5a9 100644 --- a/src/vlib/threads.h +++ b/src/vlib/threads.h @@ -171,6 +171,13 @@ typedef struct frame_queue_nelt_counter_t *frame_queue_histogram; } vlib_frame_queue_main_t; +typedef struct +{ + uword node_index; + uword type_opaque; + uword data; +} vlib_process_signal_event_mt_args_t; + /* Called early, in thread 0's context */ clib_error_t *vlib_thread_init (vlib_main_t * vm); @@ -510,9 +517,14 @@ vlib_get_worker_handoff_queue_elt (u32 frame_queue_index, } u8 *vlib_thread_stack_init (uword thread_index); - int vlib_thread_cb_register (struct vlib_main_t *vm, vlib_thread_callbacks_t * cb); +extern void *rpc_call_main_thread_cb_fn; + +void +vlib_process_signal_event_mt_helper (vlib_process_signal_event_mt_args_t * + args); +void vlib_rpc_call_main_thread (void *function, u8 * args, u32 size); #endif /* included_vlib_threads_h */ diff --git a/src/vlibmemory/memory_vlib.c b/src/vlibmemory/memory_vlib.c index 77959e6d366..d305ea619aa 100644 --- a/src/vlibmemory/memory_vlib.c +++ b/src/vlibmemory/memory_vlib.c @@ -1573,6 +1573,17 @@ _(RPC_CALL_REPLY,rpc_call_reply) #define foreach_plugin_trace_msg \ _(TRACE_PLUGIN_MSG_IDS,trace_plugin_msg_ids) +/* + * Set the rpc callback at our earliest possible convenience. + * This avoids ordering issues between thread_init() -> start_workers and + * an init function which we could define here. If we ever intend to use + * vlib all by itself, we can't create a link-time dependency on + * an init function here and a typical "call foo_init first" + * guitar lick. + */ + +extern void *rpc_call_main_thread_cb_fn; + static clib_error_t * rpc_api_hookup (vlib_main_t * vm) { @@ -1599,7 +1610,7 @@ rpc_api_hookup (vlib_main_t * vm) /* No reason to halt the parade to create a trace record... */ am->is_mp_safe[VL_API_TRACE_PLUGIN_MSG_IDS] = 1; - + rpc_call_main_thread_cb_fn = vl_api_rpc_call_main_thread; return 0; } diff --git a/src/vnet/ip/ping.c b/src/vnet/ip/ping.c index c847e696917..0fa537f6281 100755 --- a/src/vnet/ip/ping.c +++ b/src/vnet/ip/ping.c @@ -97,7 +97,7 @@ signal_ip46_icmp_reply_event (u8 event_type, vlib_buffer_t * b0) clib_memcpy (vnet_buffer (vlib_get_buffer (vm, bi0_copy))->unused, &nowts, sizeof (nowts)); - vlib_process_signal_event (vm, pr->cli_process_id, event_type, bi0_copy); + vlib_process_signal_event_mt (vm, pr->cli_process_id, event_type, bi0_copy); return 1; } @@ -646,7 +646,7 @@ run_ping_ip46_address (vlib_main_t * vm, u32 table_id, ip4_address_t * pa4, i = 1 + ping_repeat; break; } - vec_free(event_data); + vec_free (event_data); } } vlib_cli_output (vm, "\n"); -- cgit 1.2.3-korg