[PATCH 5/5] ebpf: improve trace event coverage to all key operations

Daniel P. Berrangé posted 5 patches 3 months, 2 weeks ago
There is a newer version of this series
[PATCH 5/5] ebpf: improve trace event coverage to all key operations
Posted by Daniel P. Berrangé 3 months, 2 weeks ago
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>
---
 ebpf/ebpf_rss.c   | 29 ++++++++++++++++++++++++-----
 ebpf/trace-events |  6 +++++-
 2 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/ebpf/ebpf_rss.c b/ebpf/ebpf_rss.c
index 59854c8b51..8c42953475 100644
--- a/ebpf/ebpf_rss.c
+++ b/ebpf/ebpf_rss.c
@@ -53,7 +53,7 @@ static bool ebpf_rss_mmap(struct EBPFRSSContext *ctx, Error **errp)
                                    PROT_READ | PROT_WRITE, MAP_SHARED,
                                    ctx->map_configuration, 0);
     if (ctx->mmap_configuration == MAP_FAILED) {
-        trace_ebpf_error("eBPF RSS", "can not mmap eBPF configuration array");
+        trace_ebpf_rss_error(ctx, "can not mmap eBPF configuration array");
         error_setg(errp, "Unable to map eBPF configuration array");
         return false;
     }
@@ -61,7 +61,7 @@ static bool ebpf_rss_mmap(struct EBPFRSSContext *ctx, Error **errp)
                                    PROT_READ | PROT_WRITE, MAP_SHARED,
                                    ctx->map_toeplitz_key, 0);
     if (ctx->mmap_toeplitz_key == MAP_FAILED) {
-        trace_ebpf_error("eBPF RSS", "can not mmap eBPF toeplitz key");
+        trace_ebpf_rss_error(ctx, "can not mmap eBPF toeplitz key");
         error_setg(errp, "Unable to map eBPF toeplitz array");
         goto toeplitz_fail;
     }
@@ -69,11 +69,15 @@ static bool ebpf_rss_mmap(struct EBPFRSSContext *ctx, Error **errp)
                                    PROT_READ | PROT_WRITE, MAP_SHARED,
                                    ctx->map_indirections_table, 0);
     if (ctx->mmap_indirections_table == MAP_FAILED) {
-        trace_ebpf_error("eBPF RSS", "can not mmap eBPF indirection table");
+        trace_ebpf_rss_error(ctx, "can not mmap eBPF indirection table");
         error_setg(errp, "Unable to map eBPF indirection array");
         goto indirection_fail;
     }
 
+    trace_ebpf_rss_mmap(ctx,
+                        ctx->mmap_configuration,
+                        ctx->mmap_toeplitz_key,
+                        ctx->mmap_indirections_table);
     return true;
 
 indirection_fail:
@@ -108,7 +112,7 @@ bool ebpf_rss_load(struct EBPFRSSContext *ctx, Error **errp)
 
     rss_bpf_ctx = rss_bpf__open();
     if (rss_bpf_ctx == NULL) {
-        trace_ebpf_error("eBPF RSS", "can not open eBPF RSS object");
+        trace_ebpf_rss_error(ctx, "can not open eBPF RSS object");
         error_setg(errp, "Unable to open eBPF RSS object");
         goto error;
     }
@@ -116,7 +120,7 @@ bool ebpf_rss_load(struct EBPFRSSContext *ctx, Error **errp)
     bpf_program__set_type(rss_bpf_ctx->progs.tun_rss_steering_prog, BPF_PROG_TYPE_SOCKET_FILTER);
 
     if (rss_bpf__load(rss_bpf_ctx)) {
-        trace_ebpf_error("eBPF RSS", "can not load RSS program");
+        trace_ebpf_rss_error(ctx, "can not load RSS program");
         error_setg(errp, "Unable to load eBPF program");
         goto error;
     }
@@ -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) {
diff --git a/ebpf/trace-events b/ebpf/trace-events
index b3ad1a35f2..0202abd905 100644
--- a/ebpf/trace-events
+++ b/ebpf/trace-events
@@ -1,4 +1,8 @@
 # See docs/devel/tracing.rst for syntax documentation.
 
 # ebpf-rss.c
-ebpf_error(const char *s1, const char *s2) "error in %s: %s"
+ebpf_rss_error(void *ctx, const char *s) "ctx=%p error=%s"
+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_mmap(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"
+ebpf_rss_set_data(void *ctx, void *cfgptr, void *toepptr, void *indirptr) "ctx=%p config-ptr=%p toeplitz-ptr=%p indirection-ptr=%p"
-- 
2.45.2