drbd: distribute former syncer_conf settings to disk, connection, and resource level
This commit breaks the API again.
Move per-volume former syncer options into disk_conf.
Move per-connection former syncer options into net_conf.
Renamed the remainign sync_conf to res_opts
Syncer settings have been changeable at runtime, so we need to prepare
for these settings to be runtime-changeable in their new home as well.
Introduce new configuration operations, and share the netlink attribute
between "attach" (create new disk) and "disk-opts" (change options).
Same for "connect" and "net-opts".
Some fields cannot be changed at runtime, however.
Introduce a new flag GENLA_F_INVARIANT to be able to trigger on that in
the generated validation and assignment functions.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/include/linux/genl_magic_struct.h b/include/linux/genl_magic_struct.h
index 745ebfd..9a605b9 100644
--- a/include/linux/genl_magic_struct.h
+++ b/include/linux/genl_magic_struct.h
@@ -59,12 +59,20 @@
GENLA_F_MANDATORY = 1 << 14,
GENLA_F_REQUIRED = 1 << 15,
- /* This will not be present in the __u16 .nla_type, but can be
- * triggered on in <struct>_to_skb, to exclude "sensitive"
- * information from broadcasts, or on unpriviledged get requests.
- * This is useful because genetlink multicast groups can be listened in
- * on by anyone. */
+ /* Below will not be present in the __u16 .nla_type, but can be
+ * triggered on in <struct>_to_skb resp. <struct>_from_attrs */
+
+ /* To exclude "sensitive" information from broadcasts, or on
+ * unpriviledged get requests. This is useful because genetlink
+ * multicast groups can be listened in on by anyone. */
GENLA_F_SENSITIVE = 1 << 16,
+
+ /* INVARIAN options cannot be changed at runtime.
+ * Useful to share an attribute policy and struct definition,
+ * between some "create" and "change" commands,
+ * but disallow certain fields to be changed online.
+ */
+ GENLA_F_INVARIANT = 1 << 17,
};
#define __nla_type(x) ((__u16)((__u16)(x) & (__u16)NLA_TYPE_MASK))