INTERNAL void fwd_delayed (
rpc_dg_sock_pool_elt_p_t sp,
rpc_dg_recvq_elt_p_t rqe)
{
pkt_list_element_t *new_pkt;
/* save the packet on our list */
RPC_MEM_ALLOC(new_pkt,
pkt_list_element_t *,
sizeof(pkt_list_element_t),
RPC_C_MEM_UTIL,
RPC_C_MEM_WAITOK);
new_pkt->rqe = rqe;
new_pkt->sp = sp;
/* incremenet the reference count */
rpc__dg_network_sock_reference(sp);
RPC_MUTEX_LOCK(fwd_list_mutex);
new_pkt->next = delayed_pkt_head;
delayed_pkt_head = new_pkt;
RPC_MUTEX_UNLOCK(fwd_list_mutex);
return;
}
PRIVATE void rpc__dg_scall_reinit
(
rpc_dg_scall_p_t scall,
rpc_dg_sock_pool_elt_p_t sp,
rpc_dg_recvq_elt_p_t rqe
)
{
rpc_dg_pkt_hdr_p_t hdrp = rqe->hdrp;
unsigned32 st;
boolean maybe = RPC_DG_HDR_FLAG_IS_SET(rqe->hdrp, RPC_C_DG_PF_MAYBE);
RPC_LOCK_ASSERT(0);
RPC_DG_CALL_LOCK_ASSERT(&scall->c);
/*
* Re-initialize the common call handle fields
*/
RPC_DG_CALL_REINIT(&scall->c);
scall->c.c.u.server.cancel.accepting = true;
scall->c.c.u.server.cancel.queuing = true;
scall->c.c.u.server.cancel.had_pending = false;
scall->c.c.u.server.cancel.count = 0;
/*
* Typically, subsequent calls on a given actid will be for the same
* naf and network address and received over the same server socket
* from the same client socket (netaddr/endpoint), but alas, we can't
* count on that...
*/
/*
* Detect naf changes and reinit cached naf-specific info.
*
* The max_frag_size is really associated with the
* more specific "network address / interface" than just the naf
* (actually they're really dependent on the even lower level of
* path through the network even if the peer address don't change).
* However, since the runtime currently manages these as constant
* for a particular naf (mostly due to to the inability of system
* APIs and/or network transports to provide this dynamic information),
* we really only have to reset them if the naf changed (the significance
* of this is a "different netaddr" check would be more costly).
*/
if (scall->c.addr == NULL
|| rqe->from.rpc_protseq_id != scall->c.addr->rpc_protseq_id)
{
/*
* Update to the current client address.
*/
rpc__naf_addr_overcopy((rpc_addr_p_t) &rqe->from, &scall->c.addr, &st);
/*
* Initialize the max_frag_size field for the conversation with this
* client.
*/
RPC_DG_CALL_SET_MAX_FRAG_SIZE(&scall->c, &st);
RPC_DBG_PRINTF(rpc_e_dbg_recv, 7,
("(rpc__dg_scall_reinit) Set max fs %u\n",
scall->c.xq.max_frag_size));
}
else
{
/*
* Update to the (typically unchanged) current client address.
* (Only its endpoint may change.)
*/
rpc__naf_addr_overcopy((rpc_addr_p_t) &rqe->from, &scall->c.addr, &st);
}
/*
* Detect received socket changes and reinit cached socket specific info
* (the scall may not yet have a cached sock ref or it may be different
* from the current one).
*/
if (scall->c.sock_ref != sp)
{
if (scall->c.sock_ref != NULL)
rpc__dg_network_sock_release(&scall->c.sock_ref);
/*
* This reference update is a little tricky. We need to be sure
* that the socket is not closed before we get a chance to record
* our reference. We can do this safely because we are the
* listener thread, and and we know that the listener thread
* has a reference to the socket. If the socket had failed,
* and we had closed it, we wouldn't be here right now.
*/
scall->c.sock_ref = sp;
rpc__dg_network_sock_reference(sp);
/*
* Initialize the max_rcv_tsdu and max_snd_tsdu fields
* for the conversation with this client.
*/
rpc__naf_inq_max_tsdu(scall->c.addr->rpc_protseq_id,
&scall->c.xq.max_rcv_tsdu, &st);
scall->c.xq.max_snd_tsdu = scall->c.xq.max_rcv_tsdu;
scall->c.xq.max_rcv_tsdu = MIN(scall->c.xq.max_rcv_tsdu,
scall->c.sock_ref->rcvbuf);
scall->c.xq.max_snd_tsdu = MIN(scall->c.xq.max_snd_tsdu,
scall->c.sock_ref->sndbuf);
RPC_DBG_PRINTF(rpc_e_dbg_recv, 7,
("(rpc__dg_scall_reinit) Set rcv tsdu %u, snd tsdu %u\n",
scall->c.xq.max_rcv_tsdu, scall->c.xq.max_snd_tsdu));
/*
* Reinit cached socket-specific information.
*/
RPC_DG_RBUF_SIZE_TO_WINDOW_SIZE(sp->rcvbuf,
sp->is_private,
scall->c.xq.max_frag_size,
scall->c.rq.window_size);
RPC_DBG_PRINTF(rpc_e_dbg_recv, 7,
("(rpc__dg_scall_reinit) Set ws %u, rcvbuf %u, max fs %u\n",
scall->c.rq.window_size, sp->rcvbuf, scall->c.xq.max_frag_size));
}
if (scall->c.is_cbk && scall->cbk_ccall != NULL)
{
/*
* This is essentially a turnaround. The client, which is waiting
* for a response, becomes the receiver.
*
* We inherit high_rcv_frag_size and snd_frag_size from the original
* ccall.
*
* Note: If this is the initial allocation of the callback scall,
* is_cbk is still false. rpc__dg_scall_cbk_alloc() will handle that
* case.
*/
scall->c.rq.high_rcv_frag_size =
scall->cbk_ccall->c.rq.high_rcv_frag_size;
scall->c.xq.snd_frag_size = scall->cbk_ccall->c.xq.snd_frag_size;
/*
* Also we inherit the reservation from the original ccall, which
* gives us enough packets for receiving fragments.
*/
scall->c.n_resvs = scall->cbk_ccall->c.n_resvs;
}
RPC_DBG_PRINTF(rpc_e_dbg_xmit, 6,
("(rpc__dg_scall_reinit) Set snd fs %lu, high rcv fs %lu\n",
scall->c.xq.snd_frag_size, scall->c.rq.high_rcv_frag_size));
/*
* Re-initialize the fields of the common call handle header that
* are really part of the prototype packet header.
*/
scall->c.call_seq = hdrp->seq;
scall->c.high_seq = hdrp->seq;
scall->c.call_if_id = hdrp->if_id;
scall->c.call_if_vers = hdrp->if_vers;
scall->c.call_ihint = hdrp->ihint;
scall->c.call_opnum = hdrp->opnum;
scall->c.call_object = hdrp->object;
/*
* Re-initialize some remaining fields in the prototype packet header.
* Note: the ptype may not currently be "response" due to the way
* we handle fault pkts.
*/
scall->c.xq.base_flags = 0;
scall->c.xq.base_flags2 = 0;
scall->c.xq.hdr.flags = 0;
scall->c.xq.hdr.flags2 = 0;
RPC_DG_HDR_SET_PTYPE(&scall->c.xq.hdr, RPC_C_DG_PT_RESPONSE);
/*
* Reset the call state to the initial state.
*/
RPC_DG_CALL_SET_STATE(&scall->c, rpc_e_dg_cs_init);
scall->call_is_setup = false;
scall->has_call_executor_ref = false;
scall->call_is_queued = false;
scall->client_needs_sboot = false; /* Really "unknown" */
scall->c.com_timeout_knob = rpc_mgmt_inq_server_com_timeout();
/*
* If the new call uses maybe semantics, and this scall is already
* associated with an SCTE, then we may need to reposition this scall
* within the SCTE.
*/
if (maybe && scall->scte != NULL && scall->scte->scall == scall)
{
rpc_dg_sct_elt_p_t scte = scall->scte;
RPC_DBG_PRINTF(rpc_e_dbg_general, 3, (
"(rpc__dg_scall_reinit) using cached scall for maybe call\n"));
scall->c.next = (rpc_dg_call_p_t) scte->maybe_chain;
scte->maybe_chain = scall;
scte->scall = NULL;
}
}
