[LEDE-DEV] [ubox] logd: add ubus reload method

[Dan Bugnar]

Add ubus method to set the buffer size.
Example:
	ubus call log reload "{\"log_buffer_size\":size}"

Signed-off-by: Dan Bugnar <danutbug at gmail.com>
---
 log/logd.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/log/logd.c b/log/logd.c
index 27d3cac..563c545 100644
--- a/log/logd.c
+++ b/log/logd.c
@@ -26,11 +26,16 @@
 
 #include "syslog.h"
 
+#define LOG_DEFAULT_SIZE 16 * 1024
+
 int debug = 0;
 static struct blob_buf b;
 static struct ubus_auto_conn conn;
 static LIST_HEAD(clients);
 
+static const struct blobmsg_policy reload_policy =
+	{ .name = "log_buffer_size", .type = BLOBMSG_TYPE_INT32 };
+
 static const struct blobmsg_policy read_policy =
 	{ .name = "lines", .type = BLOBMSG_TYPE_INT32 };
 
@@ -124,9 +129,29 @@ write_log(struct ubus_context *ctx, struct ubus_object *obj,
 	return 0;
 }
 
+static int
+reload_log(struct ubus_context *ctx, struct ubus_object *obj,
+		struct ubus_request_data *req, const char *method,
+		struct blob_attr *msg)
+{
+	struct blob_attr *tb;
+	int size = 0;
+
+	if (msg) {
+		blobmsg_parse(&reload_policy, 1, &tb, blob_data(msg), blob_len(msg));
+		if (tb) {
+			size = blobmsg_get_u32(tb);
+			log_buffer_reinit(size < 1 ? LOG_DEFAULT_SIZE : size * 1024);
+		}
+	}
+
+	return 0;
+}
+
 static const struct ubus_method log_methods[] = {
 	{ .name = "read", .handler = read_log, .policy = &read_policy, .n_policy = 1 },
 	{ .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
+	{ .name = "reload", .handler = reload_log, .policy = &reload_policy, .n_policy = 1 },
 };
 
 static struct ubus_object_type log_object_type =
-- 
2.8.1