1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 * Message decoding, parsing and finalizing routines
7 * Copyright (c) 2001-2003 Cluster File Systems, Inc.
8 * Copyright (c) 2001-2002 Sandia National Laboratories
10 * This file is part of Lustre, http://www.sf.net/projects/lustre/
12 * Lustre is free software; you can redistribute it and/or
13 * modify it under the terms of version 2 of the GNU General Public
14 * License as published by the Free Software Foundation.
16 * Lustre is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with Lustre; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 # define DEBUG_SUBSYSTEM S_PORTALS
30 # include <linux/kp30.h>
33 #include <portals/lib-p30.h>
36 lib_enq_event_locked (lib_nal_t *nal, void *private,
37 lib_eq_t *eq, ptl_event_t *ev)
41 ev->sequence = eq->eq_enq_seq++; /* Allocate the next queue slot */
43 /* size must be a power of 2 to handle sequence # overflow */
44 LASSERT (eq->eq_size != 0 &&
45 eq->eq_size == LOWEST_BIT_SET (eq->eq_size));
46 eq_slot = eq->eq_events + (ev->sequence & (eq->eq_size - 1));
48 /* There is no race since both event consumers and event producers
49 * take the LIB_LOCK(), so we don't screw around with memory
50 * barriers, setting the sequence number last or wierd structure
51 * layout assertions. */
54 /* Call the callback handler (if any) */
55 if (eq->eq_callback != NULL)
56 eq->eq_callback (eq_slot);
58 /* Wake anyone sleeping for an event (see lib-eq.c) */
60 if (waitqueue_active(&nal->libnal_ni.ni_waitq))
61 wake_up_all(&nal->libnal_ni.ni_waitq);
63 pthread_cond_broadcast(&nal->libnal_ni.ni_cond);
68 lib_finalize (lib_nal_t *nal, void *private, lib_msg_t *msg, ptl_err_t status)
79 /* Only send an ACK if the PUT completed successfully */
80 if (status == PTL_OK &&
81 !ptl_is_wire_handle_none(&msg->ack_wmd)) {
83 LASSERT(msg->ev.type == PTL_EVENT_PUT_END);
85 memset (&ack, 0, sizeof (ack));
86 ack.type = HTON__u32 (PTL_MSG_ACK);
87 ack.dest_nid = HTON__u64 (msg->ev.initiator.nid);
88 ack.dest_pid = HTON__u32 (msg->ev.initiator.pid);
89 ack.src_nid = HTON__u64 (nal->libnal_ni.ni_pid.nid);
90 ack.src_pid = HTON__u32 (nal->libnal_ni.ni_pid.pid);
91 ack.payload_length = 0;
93 ack.msg.ack.dst_wmd = msg->ack_wmd;
94 ack.msg.ack.match_bits = msg->ev.match_bits;
95 ack.msg.ack.mlength = HTON__u32 (msg->ev.mlength);
97 rc = lib_send (nal, private, NULL, &ack, PTL_MSG_ACK,
98 msg->ev.initiator.nid, msg->ev.initiator.pid,
101 /* send failed: there's nothing else to clean up. */
102 CERROR("Error %d sending ACK to "LPX64"\n",
103 rc, msg->ev.initiator.nid);
109 LIB_LOCK(nal, flags);
111 /* Now it's safe to drop my caller's ref */
113 LASSERT (md->pending >= 0);
115 /* Should I unlink this MD? */
116 if (md->pending != 0) /* other refs */
118 else if ((md->md_flags & PTL_MD_FLAG_ZOMBIE) != 0)
120 else if ((md->md_flags & PTL_MD_FLAG_AUTO_UNLINK) == 0)
123 unlink = lib_md_exhausted(md);
125 msg->ev.ni_fail_type = status;
126 msg->ev.unlinked = unlink;
129 lib_enq_event_locked(nal, private, md->eq, &msg->ev);
132 lib_md_unlink(nal, md);
134 list_del (&msg->msg_list);
135 nal->libnal_ni.ni_counters.msgs_alloc--;
136 lib_msg_free(nal, msg);
138 LIB_UNLOCK(nal, flags);