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-rw-r--r--rpc/rpc-lib/src/rpcsvc.c91
1 files changed, 71 insertions, 20 deletions
diff --git a/rpc/rpc-lib/src/rpcsvc.c b/rpc/rpc-lib/src/rpcsvc.c
index d69756c..7efb2e1 100644
--- a/rpc/rpc-lib/src/rpcsvc.c
+++ b/rpc/rpc-lib/src/rpcsvc.c
@@ -28,6 +28,7 @@
#include "xdr-generic.h"
#include "rpc-common-xdr.h"
#include "syncop.h"
+#include "rpc-drc.h"
#include <errno.h>
#include <pthread.h>
@@ -422,6 +423,7 @@ rpcsvc_request_create (rpcsvc_t *svc, rpc_transport_t *trans,
* since we are not handling authentication failures for now.
*/
req->rpc_status = MSG_ACCEPTED;
+ req->reply = NULL;
ret = 0;
err:
if (ret == -1) {
@@ -461,13 +463,15 @@ int
rpcsvc_handle_rpc_call (rpcsvc_t *svc, rpc_transport_t *trans,
rpc_transport_pollin_t *msg)
{
- rpcsvc_actor_t *actor = NULL;
- rpcsvc_actor actor_fn = NULL;
- rpcsvc_request_t *req = NULL;
- int ret = -1;
- uint16_t port = 0;
- gf_boolean_t is_unix = _gf_false;
- gf_boolean_t unprivileged = _gf_false;
+ rpcsvc_actor_t *actor = NULL;
+ rpcsvc_actor actor_fn = NULL;
+ rpcsvc_request_t *req = NULL;
+ int ret = -1;
+ uint16_t port = 0;
+ gf_boolean_t is_unix = _gf_false;
+ gf_boolean_t unprivileged = _gf_false;
+ drc_cached_op_t *reply = NULL;
+ rpcsvc_drc_globals_t *drc = NULL;
if (!trans || !svc)
return -1;
@@ -503,7 +507,7 @@ rpcsvc_handle_rpc_call (rpcsvc_t *svc, rpc_transport_t *trans,
req = rpcsvc_request_create (svc, trans, msg);
if (!req)
- goto err;
+ goto out;
if (!rpcsvc_request_accepted (req))
goto err_reply;
@@ -521,6 +525,39 @@ rpcsvc_handle_rpc_call (rpcsvc_t *svc, rpc_transport_t *trans,
return -1;
}
+ /* DRC */
+ if (rpcsvc_need_drc (req)) {
+ drc = req->svc->drc;
+
+ LOCK (&drc->lock);
+ reply = rpcsvc_drc_lookup (req);
+
+ /* retransmission of completed request, send cached reply */
+ if (reply && reply->state == DRC_OP_CACHED) {
+ gf_log (GF_RPCSVC, GF_LOG_INFO, "duplicate request:"
+ " XID: 0x%x", req->xid);
+ ret = rpcsvc_send_cached_reply (req, reply);
+ drc->cache_hits++;
+ UNLOCK (&drc->lock);
+ goto out;
+
+ } /* retransmitted request, original op in transit, drop it */
+ else if (reply && reply->state == DRC_OP_IN_TRANSIT) {
+ gf_log (GF_RPCSVC, GF_LOG_INFO, "op in transit,"
+ " discarding. XID: 0x%x", req->xid);
+ ret = 0;
+ drc->intransit_hits++;
+ rpcsvc_request_destroy (req);
+ UNLOCK (&drc->lock);
+ goto out;
+
+ } /* fresh request, cache it as in-transit and proceed */
+ else {
+ ret = rpcsvc_cache_request (req);
+ }
+ UNLOCK (&drc->lock);
+ }
+
if (req->rpc_err == SUCCESS) {
/* Before going to xlator code, set the THIS properly */
THIS = svc->mydata;
@@ -557,7 +594,7 @@ err_reply:
* has now been queued. */
ret = 0;
-err:
+out:
return ret;
}
@@ -904,21 +941,22 @@ out:
return ret;
}
-static inline int
-rpcsvc_transport_submit (rpc_transport_t *trans, struct iovec *hdrvec,
- int hdrcount, struct iovec *proghdr, int proghdrcount,
- struct iovec *progpayload, int progpayloadcount,
- struct iobref *iobref, void *priv)
+int
+rpcsvc_transport_submit (rpc_transport_t *trans, struct iovec *rpchdr,
+ int rpchdrcount, struct iovec *proghdr,
+ int proghdrcount, struct iovec *progpayload,
+ int progpayloadcount, struct iobref *iobref,
+ void *priv)
{
int ret = -1;
rpc_transport_reply_t reply = {{0, }};
- if ((!trans) || (!hdrvec) || (!hdrvec->iov_base)) {
+ if ((!trans) || (!rpchdr) || (!rpchdr->iov_base)) {
goto out;
}
- reply.msg.rpchdr = hdrvec;
- reply.msg.rpchdrcount = hdrcount;
+ reply.msg.rpchdr = rpchdr;
+ reply.msg.rpchdrcount = rpchdrcount;
reply.msg.proghdr = proghdr;
reply.msg.proghdrcount = proghdrcount;
reply.msg.progpayload = progpayload;
@@ -1064,6 +1102,7 @@ rpcsvc_submit_generic (rpcsvc_request_t *req, struct iovec *proghdr,
size_t msglen = 0;
size_t hdrlen = 0;
char new_iobref = 0;
+ rpcsvc_drc_globals_t *drc = NULL;
if ((!req) || (!req->trans))
return -1;
@@ -1098,6 +1137,17 @@ rpcsvc_submit_generic (rpcsvc_request_t *req, struct iovec *proghdr,
iobref_add (iobref, replyiob);
+ /* cache the request in the duplicate request cache for appropriate ops */
+ if (req->reply) {
+ drc = req->svc->drc;
+
+ LOCK (&drc->lock);
+ ret = rpcsvc_cache_reply (req, iobref, &recordhdr, 1,
+ proghdr, hdrcount,
+ payload, payloadcount);
+ UNLOCK (&drc->lock);
+ }
+
ret = rpcsvc_transport_submit (trans, &recordhdr, 1, proghdr, hdrcount,
payload, payloadcount, iobref,
req->trans_private);
@@ -1905,6 +1955,7 @@ rpcsvc_init (xlator_t *xl, glusterfs_ctx_t *ctx, dict_t *options,
"failed to register DUMP program");
goto free_svc;
}
+
ret = 0;
free_svc:
if (ret == -1) {
@@ -2196,9 +2247,9 @@ out:
rpcsvc_actor_t gluster_dump_actors[] = {
- [GF_DUMP_NULL] = {"NULL", GF_DUMP_NULL, NULL, NULL, 0},
- [GF_DUMP_DUMP] = {"DUMP", GF_DUMP_DUMP, rpcsvc_dump, NULL, 0},
- [GF_DUMP_MAXVALUE] = {"MAXVALUE", GF_DUMP_MAXVALUE, NULL, NULL, 0},
+ [GF_DUMP_NULL] = {"NULL", GF_DUMP_NULL, NULL, NULL, 0, DRC_NA},
+ [GF_DUMP_DUMP] = {"DUMP", GF_DUMP_DUMP, rpcsvc_dump, NULL, 0, DRC_NA},
+ [GF_DUMP_MAXVALUE] = {"MAXVALUE", GF_DUMP_MAXVALUE, NULL, NULL, 0, DRC_NA},
};