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authorKaushal M <kaushal@redhat.com>2012-12-06 16:46:57 +0530
committerAnand Avati <avati@redhat.com>2012-12-09 21:59:41 -0800
commitff33ea5175b98e0df743ae3af7681fcf1e1e89eb (patch)
tree900b2a2fd645eaa0dbdd7dfe17f396d6a219d762 /rpc
parentd0b0e59952222c186120c91518ccf94862a86f64 (diff)
rpcsvc: do a 'iobuf_ref()' on buffer while synctaskizing actor
Starting rpc actors using synctask causes rpcsvc to return before the actor actually finishes its actions. This would cause the buffer to be unreffed by socket and be possibly reused, before the actor used it, leading to failures in the actor. This patch makes rpcsvc take a ref on the buffer when synctaskizing the actor and store it in the request structure, and then later unref it when the request structure is destroyed. This makes sure that the buffer is not reused before the actor has finished. Change-Id: I8f81e1fef8f3719db220471d2d8ffb8916958956 BUG: 884452 Signed-off-by: Kaushal M <kaushal@redhat.com> Reviewed-on: http://review.gluster.org/4277 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'rpc')
-rw-r--r--rpc/rpc-lib/src/rpcsvc.c33
-rw-r--r--rpc/rpc-lib/src/rpcsvc.h3
2 files changed, 23 insertions, 13 deletions
diff --git a/rpc/rpc-lib/src/rpcsvc.c b/rpc/rpc-lib/src/rpcsvc.c
index ad1e4f4..eef1f05 100644
--- a/rpc/rpc-lib/src/rpcsvc.c
+++ b/rpc/rpc-lib/src/rpcsvc.c
@@ -276,6 +276,9 @@ rpcsvc_request_destroy (rpcsvc_request_t *req)
iobref_unref (req->iobref);
}
+ if (req->hdr_iobuf)
+ iobuf_unref (req->hdr_iobuf);
+
rpc_transport_unref (req->trans);
mem_put (req);
@@ -434,19 +437,22 @@ err:
int
-rpcsvc_synctask_cbk (int ret, call_frame_t *frame, void *opaque)
+rpcsvc_check_and_reply_error (int ret, call_frame_t *frame, void *opaque)
{
rpcsvc_request_t *req = NULL;
req = opaque;
- if (ret == RPCSVC_ACTOR_ERROR)
- rpcsvc_error_reply (req);
+ if (ret == RPCSVC_ACTOR_ERROR) {
+ ret = rpcsvc_error_reply (req);
+ if (ret)
+ gf_log ("rpcsvc", GF_LOG_WARNING,
+ "failed to queue error reply");
+ }
return 0;
}
-
int
rpcsvc_handle_rpc_call (rpcsvc_t *svc, rpc_transport_t *trans,
rpc_transport_pollin_t *msg)
@@ -527,22 +533,23 @@ rpcsvc_handle_rpc_call (rpcsvc_t *svc, rpc_transport_t *trans,
goto err_reply;
}
- if (req->synctask)
+ if (req->synctask) {
+ if (msg->hdr_iobuf)
+ req->hdr_iobuf = iobuf_ref (msg->hdr_iobuf);
+
ret = synctask_new (THIS->ctx->env,
(synctask_fn_t) actor_fn,
- rpcsvc_synctask_cbk, NULL, req);
- else
+ rpcsvc_check_and_reply_error, NULL,
+ req);
+ } else {
ret = actor_fn (req);
+ req->hdr_iobuf = NULL;
+ }
}
err_reply:
- if (ret == RPCSVC_ACTOR_ERROR) {
- ret = rpcsvc_error_reply (req);
- }
-
- if (ret)
- gf_log ("rpcsvc", GF_LOG_WARNING, "failed to queue error reply");
+ ret = rpcsvc_check_and_reply_error (ret, NULL, req);
/* No need to propagate error beyond this function since the reply
* has now been queued. */
ret = 0;
diff --git a/rpc/rpc-lib/src/rpcsvc.h b/rpc/rpc-lib/src/rpcsvc.h
index 5a0ddc9..39ae383 100644
--- a/rpc/rpc-lib/src/rpcsvc.h
+++ b/rpc/rpc-lib/src/rpcsvc.h
@@ -234,6 +234,9 @@ struct rpcsvc_request {
/* Container for transport to store request-specific item */
void *trans_private;
+
+ /* we need to ref the 'iobuf' in case of 'synctasking' it */
+ struct iobuf *hdr_iobuf;
};
#define rpcsvc_request_program(req) ((rpcsvc_program_t *)((req)->prog))