ebpf: improve trace event coverage to all key operations

The existing error trace event is renamed to have a name prefix
matching its source file & to remove the redundant first arg that
adds no useful information.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

ebpf/ebpf_rss.c

@@ -74,6 +74,10 @@ static bool ebpf_rss_mmap(struct EBPFRSSContext *ctx, Error **errp)
         goto indirection_fail;
     }
 
+    trace_ebpf_rss_mmap(ctx,
+                        ctx->mmap_configuration,
+                        ctx->mmap_toeplitz_key,
+                        ctx->mmap_indirections_table);
     return true;
 
 indirection_fail:
@@ -131,6 +135,11 @@ bool ebpf_rss_load(struct EBPFRSSContext *ctx, Error **errp)
     ctx->map_toeplitz_key = bpf_map__fd(
             rss_bpf_ctx->maps.tap_rss_map_toeplitz_key);
 
+    trace_ebpf_rss_load(ctx,
+                        ctx->program_fd,
+                        ctx->map_configuration,
+                        ctx->map_indirections_table,
+                        ctx->map_toeplitz_key);
     if (!ebpf_rss_mmap(ctx, errp)) {
         goto error;
     }
@@ -178,6 +187,12 @@ bool ebpf_rss_load_fds(struct EBPFRSSContext *ctx, int program_fd,
     ctx->map_toeplitz_key = toeplitz_fd;
     ctx->map_indirections_table = table_fd;
 
+    trace_ebpf_rss_load(ctx,
+                        ctx->program_fd,
+                        ctx->map_configuration,
+                        ctx->map_indirections_table,
+                        ctx->map_toeplitz_key);
+
     if (!ebpf_rss_mmap(ctx, errp)) {
         ctx->program_fd = -1;
         ctx->map_configuration = -1;
@@ -259,6 +274,8 @@ bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
 
     ebpf_rss_set_toepliz_key(ctx, toeplitz_key);
 
+    trace_ebpf_rss_set_data(ctx, config, indirections_table, toeplitz_key);
+
     return true;
 }
 
@@ -268,6 +285,8 @@ void ebpf_rss_unload(struct EBPFRSSContext *ctx)
         return;
     }
 
+    trace_ebpf_rss_unload(ctx);
+
     ebpf_rss_munmap(ctx);
 
     if (ctx->obj) {

ebpf/trace-events

@@ -1,6 +1,10 @@
 # See docs/devel/tracing.rst for syntax documentation.
 
 # ebpf-rss.c
+ebpf_rss_load(void *ctx, int progfd, int cfgfd, int toepfd, int indirfd) "ctx=%p program-fd=%d config-fd=%d toeplitz-fd=%d indirection-fd=%d"
 ebpf_rss_load_error(void *ctx) "ctx=%p"
+ebpf_rss_mmap(void *ctx, void *cfgptr, void *toepptr, void *indirptr) "ctx=%p config-ptr=%p toeplitz-ptr=%p indirection-ptr=%p"
 ebpf_rss_mmap_error(void *ctx, const char *object) "ctx=%p object=%s"
 ebpf_rss_open_error(void *ctx) "ctx=%p"
+ebpf_rss_set_data(void *ctx, void *cfgptr, void *toepptr, void *indirptr) "ctx=%p config-ptr=%p toeplitz-ptr=%p indirection-ptr=%p"
+ebpf_rss_unload(void *ctx) "rss unload ctx=%p"