Expect filter context identifiers starting with $ctx.

[lttng-modules.git] / lttng-context.c

diff --git a/lttng-context.c b/lttng-context.c
index 9bf4d80087bff96438d1919fbb1fb583abf401a6..1121f6efd8d05066b59efdbbe08c8b1e4cb8ae21 100644 (file)
--- a/lttng-context.c
+++ b/lttng-context.c
@@ -56,14 +56,20 @@ EXPORT_SYMBOL_GPL(lttng_find_context);
 int lttng_get_context_index(struct lttng_ctx *ctx, const char *name)
 {
        unsigned int i;
+       const char *subname;
 
        if (!ctx)
                return -1;
+       if (strncmp(name, "$ctx.", strlen("$ctx.")) == 0) {
+               subname = name + strlen("$ctx.");
+       } else {
+               subname = name;
+       }
        for (i = 0; i < ctx->nr_fields; i++) {
                /* Skip allocated (but non-initialized) contexts */
                if (!ctx->fields[i].event_field.name)
                        continue;
-               if (!strcmp(ctx->fields[i].event_field.name, name))
+               if (!strcmp(ctx->fields[i].event_field.name, subname))
                        return i;
        }
        return -1;