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https://gitlab.com/libvirt/libvirt.git
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Refactor incoming message handling to prepare for data stream support
* src/remote_internal.c: Rename processCallRecvMsg to processCallDispatch, and move code specific to method replies into processCallDispatchReply, and rename processCallAsyncEvent to processCallDispatchMessage
This commit is contained in:
Daniel P. Berrange
parent
27944fac9c
commit
7a61c13834
@ -6569,29 +6569,6 @@ processCallRecvSome(virConnectPtr conn, struct private_data *priv,
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}
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static void
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processCallAsyncEvent(virConnectPtr conn, struct private_data *priv,
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int in_open,
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remote_message_header *hdr,
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XDR *xdr) {
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/* An async message has come in while we were waiting for the
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* response. Process it to pull it off the wire, and try again
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*/
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DEBUG0("Encountered an event while waiting for a response");
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if (in_open) {
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DEBUG("Ignoring bogus event %d received while in open", hdr->proc);
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return;
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}
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if (hdr->proc == REMOTE_PROC_DOMAIN_EVENT) {
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remoteDomainQueueEvent(conn, xdr);
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virEventUpdateTimeout(priv->eventFlushTimer, 0);
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} else {
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DEBUG("Unexpected event proc %d", hdr->proc);
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}
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}
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static int
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processCallRecvLen(virConnectPtr conn, struct private_data *priv,
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int in_open) {
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@ -6630,12 +6607,25 @@ processCallRecvLen(virConnectPtr conn, struct private_data *priv,
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static int
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processCallRecvMsg(virConnectPtr conn, struct private_data *priv,
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int in_open) {
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processCallDispatchReply(virConnectPtr conn, struct private_data *priv,
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int in_open,
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remote_message_header *hdr,
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XDR *xdr);
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static int
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processCallDispatchMessage(virConnectPtr conn, struct private_data *priv,
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int in_open,
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remote_message_header *hdr,
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XDR *xdr);
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static int
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processCallDispatch(virConnectPtr conn, struct private_data *priv,
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int in_open) {
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XDR xdr;
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struct remote_message_header hdr;
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int len = priv->bufferLength - 4;
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struct remote_thread_call *thecall;
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int rv = -1;
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/* Deserialise reply header. */
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xdrmem_create (&xdr, priv->buffer + 4, len, XDR_DECODE);
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@ -6663,30 +6653,44 @@ processCallRecvMsg(virConnectPtr conn, struct private_data *priv,
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return -1;
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}
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/* Async events from server need special handling */
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if (hdr.type == REMOTE_MESSAGE) {
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processCallAsyncEvent(conn, priv, in_open,
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&hdr, &xdr);
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xdr_destroy(&xdr);
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return 0;
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switch (hdr.type) {
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case REMOTE_REPLY: /* Normal RPC replies */
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rv = processCallDispatchReply(conn, priv, in_open,
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&hdr, &xdr);
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break;
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case REMOTE_MESSAGE: /* Async notifications */
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rv = processCallDispatchMessage(conn, priv, in_open,
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&hdr, &xdr);
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break;
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default:
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virRaiseError (in_open ? NULL : conn,
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NULL, NULL, VIR_FROM_REMOTE,
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VIR_ERR_RPC, VIR_ERR_ERROR, NULL, NULL, NULL, 0, 0,
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_("got unexpected RPC call %d from server"),
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hdr.proc);
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rv = -1;
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break;
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}
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if (hdr.type != REMOTE_REPLY) {
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virRaiseError (in_open ? NULL : conn,
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NULL, NULL, VIR_FROM_REMOTE,
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VIR_ERR_RPC, VIR_ERR_ERROR, NULL, NULL, NULL, 0, 0,
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_("got unexpected RPC call %d from server"),
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hdr.proc);
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xdr_destroy(&xdr);
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return -1;
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}
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xdr_destroy(&xdr);
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return rv;
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}
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static int
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processCallDispatchReply(virConnectPtr conn, struct private_data *priv,
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int in_open,
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remote_message_header *hdr,
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XDR *xdr) {
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struct remote_thread_call *thecall;
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/* Ok, definitely got an RPC reply now find
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out who's been waiting for it */
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thecall = priv->waitDispatch;
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while (thecall &&
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thecall->serial != hdr.serial)
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thecall->serial != hdr->serial)
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thecall = thecall->next;
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if (!thecall) {
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@ -6694,18 +6698,16 @@ processCallRecvMsg(virConnectPtr conn, struct private_data *priv,
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NULL, NULL, VIR_FROM_REMOTE,
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VIR_ERR_RPC, VIR_ERR_ERROR, NULL, NULL, NULL, 0, 0,
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_("no call waiting for reply with serial %d"),
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hdr.serial);
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xdr_destroy(&xdr);
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hdr->serial);
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return -1;
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}
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if (hdr.proc != thecall->proc_nr) {
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if (hdr->proc != thecall->proc_nr) {
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virRaiseError (in_open ? NULL : conn,
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NULL, NULL, VIR_FROM_REMOTE,
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VIR_ERR_RPC, VIR_ERR_ERROR, NULL, NULL, NULL, 0, 0,
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_("unknown procedure (received %x, expected %x)"),
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hdr.proc, thecall->proc_nr);
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xdr_destroy (&xdr);
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hdr->proc, thecall->proc_nr);
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return -1;
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}
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@ -6713,25 +6715,23 @@ processCallRecvMsg(virConnectPtr conn, struct private_data *priv,
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* structure), or REMOTE_ERROR (and what follows is a remote_error
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* structure).
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*/
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switch (hdr.status) {
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switch (hdr->status) {
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case REMOTE_OK:
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if (!(*thecall->ret_filter) (&xdr, thecall->ret)) {
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if (!(*thecall->ret_filter) (xdr, thecall->ret)) {
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error (in_open ? NULL : conn, VIR_ERR_RPC,
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_("unmarshalling ret"));
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return -1;
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}
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thecall->mode = REMOTE_MODE_COMPLETE;
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xdr_destroy (&xdr);
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return 0;
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case REMOTE_ERROR:
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memset (&thecall->err, 0, sizeof thecall->err);
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if (!xdr_remote_error (&xdr, &thecall->err)) {
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if (!xdr_remote_error (xdr, &thecall->err)) {
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error (in_open ? NULL : conn,
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VIR_ERR_RPC, _("unmarshalling remote_error"));
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return -1;
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}
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xdr_destroy (&xdr);
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thecall->mode = REMOTE_MODE_ERROR;
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return 0;
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@ -6739,12 +6739,36 @@ processCallRecvMsg(virConnectPtr conn, struct private_data *priv,
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virRaiseError (in_open ? NULL : conn, NULL, NULL, VIR_FROM_REMOTE,
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VIR_ERR_RPC, VIR_ERR_ERROR, NULL, NULL, NULL, 0, 0,
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_("unknown status (received %x)"),
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hdr.status);
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xdr_destroy (&xdr);
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hdr->status);
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return -1;
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}
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}
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static int
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processCallDispatchMessage(virConnectPtr conn, struct private_data *priv,
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int in_open,
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remote_message_header *hdr,
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XDR *xdr) {
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/* An async message has come in while we were waiting for the
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* response. Process it to pull it off the wire, and try again
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*/
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DEBUG0("Encountered an event while waiting for a response");
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if (in_open) {
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DEBUG("Ignoring bogus event %d received while in open", hdr->proc);
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return -1;
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}
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if (hdr->proc == REMOTE_PROC_DOMAIN_EVENT) {
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remoteDomainQueueEvent(conn, xdr);
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virEventUpdateTimeout(priv->eventFlushTimer, 0);
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} else {
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return -1;
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DEBUG("Unexpected event proc %d", hdr->proc);
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}
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return 0;
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}
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static int
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processCallRecv(virConnectPtr conn, struct private_data *priv,
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@ -6775,7 +6799,7 @@ processCallRecv(virConnectPtr conn, struct private_data *priv,
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* next iteration.
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*/
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} else {
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ret = processCallRecvMsg(conn, priv, in_open);
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ret = processCallDispatch(conn, priv, in_open);
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priv->bufferOffset = priv->bufferLength = 0;
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/*
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* We've completed one call, so return even
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