From 618d05635e7cea0f65633808c293b3a647611290 Mon Sep 17 00:00:00 2001 From: Jerin Jacob Date: Sat, 11 Apr 2020 19:44:08 +0530 Subject: [PATCH] graph: implement Graphviz export Adding API implementation support exporting the graph object to file. This will export the graph to a file in Graphviz format. It can be viewed in many viewers such as https://dreampuf.github.io/GraphvizOnline/ Signed-off-by: Jerin Jacob Signed-off-by: Kiran Kumar K Signed-off-by: Pavan Nikhilesh Signed-off-by: Nithin Dabilpuram --- lib/librte_graph/graph.c | 53 ++++++++++++++++++++++++++ lib/librte_graph/rte_graph_version.map | 1 + 2 files changed, 54 insertions(+) diff --git a/lib/librte_graph/graph.c b/lib/librte_graph/graph.c index 7a77cb5c81..61e212e036 100644 --- a/lib/librte_graph/graph.c +++ b/lib/librte_graph/graph.c @@ -473,6 +473,59 @@ __rte_node_stream_alloc(struct rte_graph *graph, struct rte_node *node) node->realloc_count++; } +static int +graph_to_dot(FILE *f, struct graph *graph) +{ + const char *src_edge_color = " [color=blue]\n"; + const char *edge_color = "\n"; + struct graph_node *graph_node; + char *node_name; + rte_edge_t i; + int rc; + + rc = fprintf(f, "Digraph %s {\n\trankdir=LR;\n", graph->name); + if (rc < 0) + goto end; + + STAILQ_FOREACH(graph_node, &graph->node_list, next) { + node_name = graph_node->node->name; + for (i = 0; i < graph_node->node->nb_edges; i++) { + rc = fprintf(f, "\t\"%s\"->\"%s\"%s", node_name, + graph_node->adjacency_list[i]->node->name, + graph_node->node->flags & RTE_NODE_SOURCE_F + ? src_edge_color + : edge_color); + if (rc < 0) + goto end; + } + } + rc = fprintf(f, "}\n"); + if (rc < 0) + goto end; + + return 0; +end: + rte_errno = EBADF; + return -rte_errno; +} + +int +rte_graph_export(const char *name, FILE *f) +{ + struct graph *graph; + int rc = ENOENT; + + STAILQ_FOREACH(graph, &graph_list, next) { + if (strncmp(graph->name, name, RTE_GRAPH_NAMESIZE) == 0) { + rc = graph_to_dot(f, graph); + goto end; + } + } +end: + return -rc; +} + + rte_graph_t rte_graph_max_count(void) { diff --git a/lib/librte_graph/rte_graph_version.map b/lib/librte_graph/rte_graph_version.map index 5a2b132933..2797be0448 100644 --- a/lib/librte_graph/rte_graph_version.map +++ b/lib/librte_graph/rte_graph_version.map @@ -6,6 +6,7 @@ EXPERIMENTAL { rte_graph_create; rte_graph_destroy; + rte_graph_export; rte_graph_from_name; rte_graph_id_to_name; rte_graph_lookup; -- 2.20.1