A program can bundle a sequence of commands in one netlink packet but the kernel was having to reply in many different packets, this adds a flag W1_CN_BUNDLE in the cn_msg.flags to allow the kernel to bundle the replies in to one message. This is opt in to avoid breaking programs that aren't expecting additional messages.
Netlink connector now has a new call cn_netlink_send_multi, which allow sending multiple cn_msg structures in a nlmsghdr structure. I tested with my client program that will bundle up 14 temperature sensor conversions, then after a delay, bundle up another set of commands to read all 14 with the bundle bit set. I also tested with a two year old version of the software that sends requests two one slave at a time (bundling only the write/read to get the data out), and doesn't have code to read the bundling the this patch adds. Both operate correctly running at the same time. Documentation/connector/connector.txt | 15 +- Documentation/w1/w1.generic | 2 +- Documentation/w1/w1.netlink | 13 +- drivers/connector/connector.c | 17 +- drivers/w1/w1.h | 8 - drivers/w1/w1_netlink.c | 673 ++++++++++++++++++++------------- drivers/w1/w1_netlink.h | 36 ++ include/linux/connector.h | 1 + 8 files changed, 489 insertions(+), 276 deletions(-) [PATCH 1/3] w1: fix netlink refcnt leak on error path [PATCH 2/3] connector: allow multiple messages to be sent in one [PATCH 3/3] w1: optional bundling of netlink kernel replies -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
