Extend the rotation API to provide network trace archive locations

[lttng-tools.git] / src / bin / lttng-sessiond / trace-kernel.c

diff --git a/src/bin/lttng-sessiond/trace-kernel.c b/src/bin/lttng-sessiond/trace-kernel.c
index 5769576cd0ea47f9d0f11255cadcbbc2aaf8e3b7..ef5abbab4c3b20fe8d39165012e27b756234a43e 100644 (file)
--- a/src/bin/lttng-sessiond/trace-kernel.c
+++ b/src/bin/lttng-sessiond/trace-kernel.c
@@ -221,6 +221,7 @@ struct ltt_kernel_channel *trace_kernel_create_channel(
        lkc->stream_count = 0;
        lkc->event_count = 0;
        lkc->enabled = 1;
+       lkc->published_to_notification_thread = false;
        /* Init linked list */
        CDS_INIT_LIST_HEAD(&lkc->events_list.head);
        CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
@@ -256,11 +257,33 @@ struct ltt_kernel_context *trace_kernel_create_context(
        if (ctx) {
                memcpy(&kctx->ctx, ctx, sizeof(kctx->ctx));
        }
+error:
+       return kctx;
+}
+
+/*
+ * Allocate and init a kernel context object from an existing kernel context
+ * object.
+ *
+ * Return the allocated object or NULL on error.
+ */
+struct ltt_kernel_context *trace_kernel_copy_context(
+               struct ltt_kernel_context *kctx)
+{
+       struct ltt_kernel_context *kctx_copy;
 
-       CDS_INIT_LIST_HEAD(&kctx->list);
+       assert(kctx);
+       kctx_copy = zmalloc(sizeof(*kctx_copy));
+       if (!kctx_copy) {
+               PERROR("zmalloc ltt_kernel_context");
+               goto error;
+       }
+
+       memcpy(kctx_copy, kctx, sizeof(*kctx_copy));
+       memset(&kctx_copy->list, 0, sizeof(kctx_copy->list));
 
 error:
-       return kctx;
+       return kctx_copy;
 }
 
 /*
@@ -478,7 +501,9 @@ void trace_kernel_destroy_context(struct ltt_kernel_context *ctx)
 {
        assert(ctx);
 
-       cds_list_del(&ctx->list);
+       if (ctx->in_list) {
+               cds_list_del(&ctx->list);
+       }
        free(ctx);
 }
 
@@ -522,10 +547,11 @@ void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel)
        /* Remove from channel list */
        cds_list_del(&channel->list);
 
-       if (notification_thread_handle) {
+       if (notification_thread_handle
+                       && channel->published_to_notification_thread) {
                status = notification_thread_command_remove_channel(
                                notification_thread_handle,
-                               channel->fd, LTTNG_DOMAIN_KERNEL);
+                               channel->key, LTTNG_DOMAIN_KERNEL);
                assert(status == LTTNG_OK);
        }
        free(channel->channel->attr.extended.ptr);