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authorLars Ellenberg <lars.ellenberg@linbit.com>2011-03-07 10:20:08 +0100
committerPhilipp Reisner <philipp.reisner@linbit.com>2011-10-14 16:48:08 +0200
commitec2c35ac1ea288f5c931e32452ecea50068e8450 (patch)
tree0f21d21aab56f188c21109fc38305d17dcce6df3 /include/linux/drbd_genl_api.h
parent3cb7a2a90fe35eb3059e8860d0c6917eb414f791 (diff)
drbd: prepare the transition from connector to genetlink
This adds the new API header and helper files. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'include/linux/drbd_genl_api.h')
-rw-r--r--include/linux/drbd_genl_api.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/include/linux/drbd_genl_api.h b/include/linux/drbd_genl_api.h
new file mode 100644
index 00000000000..9ef50d51e34
--- /dev/null
+++ b/include/linux/drbd_genl_api.h
@@ -0,0 +1,55 @@
+#ifndef DRBD_GENL_STRUCT_H
+#define DRBD_GENL_STRUCT_H
+
+/**
+ * struct drbd_genlmsghdr - DRBD specific header used in NETLINK_GENERIC requests
+ * @minor:
+ * For admin requests (user -> kernel): which minor device to operate on.
+ * For (unicast) replies or informational (broadcast) messages
+ * (kernel -> user): which minor device the information is about.
+ * If we do not operate on minors, but on connections or resources,
+ * the minor value shall be (~0), and the attribute DRBD_NLA_CFG_CONTEXT
+ * is used instead.
+ * @flags: possible operation modifiers (relevant only for user->kernel):
+ * DRBD_GENL_F_SET_DEFAULTS
+ * @volume:
+ * When creating a new minor (adding it to a resource), the resource needs
+ * to know which volume number within the resource this is supposed to be.
+ * The volume number corresponds to the same volume number on the remote side,
+ * whereas the minor number on the remote side may be different
+ * (union with flags).
+ * @ret_code: kernel->userland unicast cfg reply return code (union with flags);
+ */
+struct drbd_genlmsghdr {
+ __u32 minor;
+ union {
+ __u32 flags;
+ __s32 ret_code;
+ };
+};
+
+/* To be used in drbd_genlmsghdr.flags */
+enum {
+ DRBD_GENL_F_SET_DEFAULTS = 1,
+};
+
+enum drbd_state_info_bcast_reason {
+ SIB_GET_STATUS_REPLY = 1,
+ SIB_STATE_CHANGE = 2,
+ SIB_HELPER_PRE = 3,
+ SIB_HELPER_POST = 4,
+ SIB_SYNC_PROGRESS = 5,
+};
+
+/* hack around predefined gcc/cpp "linux=1",
+ * we cannot possibly include <1/drbd_genl.h> */
+#undef linux
+
+#include <linux/drbd.h>
+#define GENL_MAGIC_VERSION API_VERSION
+#define GENL_MAGIC_FAMILY drbd
+#define GENL_MAGIC_FAMILY_HDRSZ sizeof(struct drbd_genlmsghdr)
+#define GENL_MAGIC_INCLUDE_FILE <linux/drbd_genl.h>
+#include <linux/genl_magic_struct.h>
+
+#endif