Le 15/07/2016 18:27, Topi Miettinen a écrit : [snip] >> Why playing with version number? It complexifies the (userland) code and >> existing applications break when the kernel is updated. >> Goal of netlink is to be easily extensible. By adding a new attribute, existing >> userspace tools won't break. > > I just followed this text in taskstats.h. Does that give wrong advice? > > * The struct is versioned. Newer versions should only add fields to > * the bottom of the struct to maintain backward compatibility. > * > * > * To add new fields > * a) bump up TASKSTATS_VERSION > * b) add comment indicating new version number at end of struct > * c) add new fields after version comment; maintain 64-bit alignment I don't know taskstats well, but that is not how netlink works. There is no need to manage a version with netlink, just add new attributes. Regards, Nicolas -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
