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authorSage Weil <sage@inktank.com>2013-03-25 19:47:40 +0400
committerSage Weil <sage@inktank.com>2013-05-02 08:17:09 +0400
commit3a23083bda56850a1dc0e1c6d270b1f5dc789f07 (patch)
treeddd52f6a7c8da4334d68ae3e28825d89155d29a0 /include/linux/ceph
parent022f3e2ee2354599faccf5a764a5a24a5dd194c9 (diff)
downloadlinux-3a23083bda56850a1dc0e1c6d270b1f5dc789f07.tar.xz
libceph: implement RECONNECT_SEQ feature
This is an old protocol extension that allows the client and server to avoid resending old messages after a reconnect (following a socket error). Instead, the exchange their sequence numbers during the handshake. This avoids sending a bunch of useless data over the socket. It has been supported in the server code since v0.22 (Sep 2010). Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
Diffstat (limited to 'include/linux/ceph')
-rw-r--r--include/linux/ceph/ceph_features.h2
-rw-r--r--include/linux/ceph/msgr.h1
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/ceph/ceph_features.h b/include/linux/ceph/ceph_features.h
index 76554cecaab2..4c42080347af 100644
--- a/include/linux/ceph/ceph_features.h
+++ b/include/linux/ceph/ceph_features.h
@@ -41,6 +41,7 @@
*/
#define CEPH_FEATURES_SUPPORTED_DEFAULT \
(CEPH_FEATURE_NOSRCADDR | \
+ CEPH_FEATURE_RECONNECT_SEQ | \
CEPH_FEATURE_PGID64 | \
CEPH_FEATURE_PGPOOL3 | \
CEPH_FEATURE_OSDENC | \
@@ -51,6 +52,7 @@
#define CEPH_FEATURES_REQUIRED_DEFAULT \
(CEPH_FEATURE_NOSRCADDR | \
+ CEPH_FEATURE_RECONNECT_SEQ | \
CEPH_FEATURE_PGID64 | \
CEPH_FEATURE_PGPOOL3 | \
CEPH_FEATURE_OSDENC)
diff --git a/include/linux/ceph/msgr.h b/include/linux/ceph/msgr.h
index 680d3d648cac..3d94a73b5f30 100644
--- a/include/linux/ceph/msgr.h
+++ b/include/linux/ceph/msgr.h
@@ -87,6 +87,7 @@ struct ceph_entity_inst {
#define CEPH_MSGR_TAG_BADPROTOVER 10 /* bad protocol version */
#define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */
#define CEPH_MSGR_TAG_FEATURES 12 /* insufficient features */
+#define CEPH_MSGR_TAG_SEQ 13 /* 64-bit int follows with seen seq number */
/*