1689 lines
40 KiB
C
1689 lines
40 KiB
C
/*
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* GPL HEADER START
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 only,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 for more details (a copy is included
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* in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; If not, see
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* http://www.gnu.org/licenses/gpl-2.0.html
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*
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* GPL HEADER END
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*/
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/*
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* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2012, 2015, Intel Corporation.
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*/
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/*
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* This file is part of Lustre, http://www.lustre.org/
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* Lustre is a trademark of Sun Microsystems, Inc.
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*
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* lnet/selftest/rpc.c
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*
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* Author: Isaac Huang <isaac@clusterfs.com>
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*
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* 2012-05-13: Liang Zhen <liang@whamcloud.com>
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* - percpt data for service to improve smp performance
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* - code cleanup
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*/
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#define DEBUG_SUBSYSTEM S_LNET
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#include "selftest.h"
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enum srpc_state {
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SRPC_STATE_NONE,
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SRPC_STATE_NI_INIT,
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SRPC_STATE_EQ_INIT,
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SRPC_STATE_RUNNING,
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SRPC_STATE_STOPPING,
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};
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static struct smoketest_rpc {
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spinlock_t rpc_glock; /* global lock */
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struct srpc_service *rpc_services[SRPC_SERVICE_MAX_ID + 1];
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struct lnet_handle_eq rpc_lnet_eq; /* _the_ LNet event queue */
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enum srpc_state rpc_state;
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struct srpc_counters rpc_counters;
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__u64 rpc_matchbits; /* matchbits counter */
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} srpc_data;
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static inline int
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srpc_serv_portal(int svc_id)
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{
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return svc_id < SRPC_FRAMEWORK_SERVICE_MAX_ID ?
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SRPC_FRAMEWORK_REQUEST_PORTAL : SRPC_REQUEST_PORTAL;
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}
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/* forward ref's */
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int srpc_handle_rpc(struct swi_workitem *wi);
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void srpc_get_counters(struct srpc_counters *cnt)
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{
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spin_lock(&srpc_data.rpc_glock);
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*cnt = srpc_data.rpc_counters;
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spin_unlock(&srpc_data.rpc_glock);
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}
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void srpc_set_counters(const struct srpc_counters *cnt)
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{
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spin_lock(&srpc_data.rpc_glock);
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srpc_data.rpc_counters = *cnt;
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spin_unlock(&srpc_data.rpc_glock);
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}
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static int
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srpc_add_bulk_page(struct srpc_bulk *bk, struct page *pg, int i, int off,
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int nob)
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{
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LASSERT(off < PAGE_SIZE);
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LASSERT(nob > 0 && nob <= PAGE_SIZE);
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bk->bk_iovs[i].bv_offset = off;
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bk->bk_iovs[i].bv_page = pg;
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bk->bk_iovs[i].bv_len = nob;
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return nob;
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}
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void
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srpc_free_bulk(struct srpc_bulk *bk)
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{
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int i;
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struct page *pg;
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LASSERT(bk);
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for (i = 0; i < bk->bk_niov; i++) {
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pg = bk->bk_iovs[i].bv_page;
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if (!pg)
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break;
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__free_page(pg);
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}
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LIBCFS_FREE(bk, offsetof(struct srpc_bulk, bk_iovs[bk->bk_niov]));
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}
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struct srpc_bulk *
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srpc_alloc_bulk(int cpt, unsigned int bulk_off, unsigned int bulk_npg,
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unsigned int bulk_len, int sink)
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{
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struct srpc_bulk *bk;
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int i;
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LASSERT(bulk_npg > 0 && bulk_npg <= LNET_MAX_IOV);
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LIBCFS_CPT_ALLOC(bk, lnet_cpt_table(), cpt,
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offsetof(struct srpc_bulk, bk_iovs[bulk_npg]));
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if (!bk) {
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CERROR("Can't allocate descriptor for %d pages\n", bulk_npg);
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return NULL;
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}
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memset(bk, 0, offsetof(struct srpc_bulk, bk_iovs[bulk_npg]));
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bk->bk_sink = sink;
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bk->bk_len = bulk_len;
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bk->bk_niov = bulk_npg;
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for (i = 0; i < bulk_npg; i++) {
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struct page *pg;
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int nob;
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pg = alloc_pages_node(cfs_cpt_spread_node(lnet_cpt_table(), cpt),
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GFP_KERNEL, 0);
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if (!pg) {
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CERROR("Can't allocate page %d of %d\n", i, bulk_npg);
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srpc_free_bulk(bk);
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return NULL;
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}
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nob = min_t(unsigned int, bulk_off + bulk_len, PAGE_SIZE) -
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bulk_off;
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srpc_add_bulk_page(bk, pg, i, bulk_off, nob);
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bulk_len -= nob;
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bulk_off = 0;
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}
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return bk;
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}
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static inline __u64
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srpc_next_id(void)
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{
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__u64 id;
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spin_lock(&srpc_data.rpc_glock);
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id = srpc_data.rpc_matchbits++;
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spin_unlock(&srpc_data.rpc_glock);
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return id;
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}
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static void
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srpc_init_server_rpc(struct srpc_server_rpc *rpc,
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struct srpc_service_cd *scd,
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struct srpc_buffer *buffer)
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{
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memset(rpc, 0, sizeof(*rpc));
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swi_init_workitem(&rpc->srpc_wi, rpc, srpc_handle_rpc,
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srpc_serv_is_framework(scd->scd_svc) ?
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lst_sched_serial : lst_sched_test[scd->scd_cpt]);
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rpc->srpc_ev.ev_fired = 1; /* no event expected now */
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rpc->srpc_scd = scd;
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rpc->srpc_reqstbuf = buffer;
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rpc->srpc_peer = buffer->buf_peer;
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rpc->srpc_self = buffer->buf_self;
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LNetInvalidateMDHandle(&rpc->srpc_replymdh);
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}
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static void
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srpc_service_fini(struct srpc_service *svc)
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{
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struct srpc_service_cd *scd;
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struct srpc_server_rpc *rpc;
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struct srpc_buffer *buf;
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struct list_head *q;
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int i;
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if (!svc->sv_cpt_data)
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return;
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cfs_percpt_for_each(scd, i, svc->sv_cpt_data) {
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while (1) {
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if (!list_empty(&scd->scd_buf_posted))
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q = &scd->scd_buf_posted;
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else if (!list_empty(&scd->scd_buf_blocked))
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q = &scd->scd_buf_blocked;
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else
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break;
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while (!list_empty(q)) {
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buf = list_entry(q->next, struct srpc_buffer,
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buf_list);
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list_del(&buf->buf_list);
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LIBCFS_FREE(buf, sizeof(*buf));
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}
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}
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LASSERT(list_empty(&scd->scd_rpc_active));
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while (!list_empty(&scd->scd_rpc_free)) {
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rpc = list_entry(scd->scd_rpc_free.next,
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struct srpc_server_rpc,
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srpc_list);
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list_del(&rpc->srpc_list);
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LIBCFS_FREE(rpc, sizeof(*rpc));
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}
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}
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cfs_percpt_free(svc->sv_cpt_data);
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svc->sv_cpt_data = NULL;
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}
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static int
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srpc_service_nrpcs(struct srpc_service *svc)
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{
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int nrpcs = svc->sv_wi_total / svc->sv_ncpts;
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return srpc_serv_is_framework(svc) ?
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max(nrpcs, SFW_FRWK_WI_MIN) : max(nrpcs, SFW_TEST_WI_MIN);
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}
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int srpc_add_buffer(struct swi_workitem *wi);
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static int
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srpc_service_init(struct srpc_service *svc)
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{
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struct srpc_service_cd *scd;
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struct srpc_server_rpc *rpc;
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int nrpcs;
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int i;
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int j;
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svc->sv_shuttingdown = 0;
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svc->sv_cpt_data = cfs_percpt_alloc(lnet_cpt_table(),
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sizeof(**svc->sv_cpt_data));
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if (!svc->sv_cpt_data)
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return -ENOMEM;
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svc->sv_ncpts = srpc_serv_is_framework(svc) ?
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1 : cfs_cpt_number(lnet_cpt_table());
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nrpcs = srpc_service_nrpcs(svc);
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cfs_percpt_for_each(scd, i, svc->sv_cpt_data) {
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scd->scd_cpt = i;
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scd->scd_svc = svc;
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spin_lock_init(&scd->scd_lock);
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INIT_LIST_HEAD(&scd->scd_rpc_free);
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INIT_LIST_HEAD(&scd->scd_rpc_active);
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INIT_LIST_HEAD(&scd->scd_buf_posted);
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INIT_LIST_HEAD(&scd->scd_buf_blocked);
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scd->scd_ev.ev_data = scd;
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scd->scd_ev.ev_type = SRPC_REQUEST_RCVD;
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/*
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* NB: don't use lst_sched_serial for adding buffer,
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* see details in srpc_service_add_buffers()
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*/
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swi_init_workitem(&scd->scd_buf_wi, scd,
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srpc_add_buffer, lst_sched_test[i]);
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if (i && srpc_serv_is_framework(svc)) {
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/*
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* NB: framework service only needs srpc_service_cd for
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* one partition, but we allocate for all to make
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* it easier to implement, it will waste a little
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* memory but nobody should care about this
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*/
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continue;
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}
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for (j = 0; j < nrpcs; j++) {
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LIBCFS_CPT_ALLOC(rpc, lnet_cpt_table(),
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i, sizeof(*rpc));
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if (!rpc) {
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srpc_service_fini(svc);
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return -ENOMEM;
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}
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list_add(&rpc->srpc_list, &scd->scd_rpc_free);
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}
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}
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return 0;
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}
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int
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srpc_add_service(struct srpc_service *sv)
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{
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int id = sv->sv_id;
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LASSERT(0 <= id && id <= SRPC_SERVICE_MAX_ID);
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if (srpc_service_init(sv))
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return -ENOMEM;
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spin_lock(&srpc_data.rpc_glock);
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LASSERT(srpc_data.rpc_state == SRPC_STATE_RUNNING);
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if (srpc_data.rpc_services[id]) {
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spin_unlock(&srpc_data.rpc_glock);
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goto failed;
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}
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srpc_data.rpc_services[id] = sv;
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spin_unlock(&srpc_data.rpc_glock);
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CDEBUG(D_NET, "Adding service: id %d, name %s\n", id, sv->sv_name);
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return 0;
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failed:
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srpc_service_fini(sv);
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return -EBUSY;
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}
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int
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srpc_remove_service(struct srpc_service *sv)
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{
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int id = sv->sv_id;
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spin_lock(&srpc_data.rpc_glock);
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if (srpc_data.rpc_services[id] != sv) {
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spin_unlock(&srpc_data.rpc_glock);
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return -ENOENT;
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}
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srpc_data.rpc_services[id] = NULL;
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spin_unlock(&srpc_data.rpc_glock);
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return 0;
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}
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static int
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srpc_post_passive_rdma(int portal, int local, __u64 matchbits, void *buf,
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int len, int options, struct lnet_process_id peer,
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struct lnet_handle_md *mdh, struct srpc_event *ev)
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{
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int rc;
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struct lnet_md md;
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struct lnet_handle_me meh;
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rc = LNetMEAttach(portal, peer, matchbits, 0, LNET_UNLINK,
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local ? LNET_INS_LOCAL : LNET_INS_AFTER, &meh);
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if (rc) {
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CERROR("LNetMEAttach failed: %d\n", rc);
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LASSERT(rc == -ENOMEM);
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return -ENOMEM;
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}
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md.threshold = 1;
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md.user_ptr = ev;
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md.start = buf;
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md.length = len;
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md.options = options;
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md.eq_handle = srpc_data.rpc_lnet_eq;
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rc = LNetMDAttach(meh, md, LNET_UNLINK, mdh);
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if (rc) {
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CERROR("LNetMDAttach failed: %d\n", rc);
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LASSERT(rc == -ENOMEM);
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rc = LNetMEUnlink(meh);
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LASSERT(!rc);
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return -ENOMEM;
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}
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CDEBUG(D_NET, "Posted passive RDMA: peer %s, portal %d, matchbits %#llx\n",
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libcfs_id2str(peer), portal, matchbits);
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return 0;
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}
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static int
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srpc_post_active_rdma(int portal, __u64 matchbits, void *buf, int len,
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int options, struct lnet_process_id peer,
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lnet_nid_t self, struct lnet_handle_md *mdh,
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struct srpc_event *ev)
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{
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int rc;
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struct lnet_md md;
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md.user_ptr = ev;
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md.start = buf;
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md.length = len;
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md.eq_handle = srpc_data.rpc_lnet_eq;
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md.threshold = options & LNET_MD_OP_GET ? 2 : 1;
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md.options = options & ~(LNET_MD_OP_PUT | LNET_MD_OP_GET);
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rc = LNetMDBind(md, LNET_UNLINK, mdh);
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if (rc) {
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CERROR("LNetMDBind failed: %d\n", rc);
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LASSERT(rc == -ENOMEM);
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return -ENOMEM;
|
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}
|
|
|
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/*
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* this is kind of an abuse of the LNET_MD_OP_{PUT,GET} options.
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* they're only meaningful for MDs attached to an ME (i.e. passive
|
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* buffers...
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*/
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if (options & LNET_MD_OP_PUT) {
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rc = LNetPut(self, *mdh, LNET_NOACK_REQ, peer,
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portal, matchbits, 0, 0);
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} else {
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LASSERT(options & LNET_MD_OP_GET);
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|
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rc = LNetGet(self, *mdh, peer, portal, matchbits, 0);
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}
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|
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if (rc) {
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CERROR("LNet%s(%s, %d, %lld) failed: %d\n",
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options & LNET_MD_OP_PUT ? "Put" : "Get",
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libcfs_id2str(peer), portal, matchbits, rc);
|
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|
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/*
|
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* The forthcoming unlink event will complete this operation
|
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* with failure, so fall through and return success here.
|
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*/
|
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rc = LNetMDUnlink(*mdh);
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LASSERT(!rc);
|
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} else {
|
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CDEBUG(D_NET, "Posted active RDMA: peer %s, portal %u, matchbits %#llx\n",
|
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libcfs_id2str(peer), portal, matchbits);
|
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}
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return 0;
|
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}
|
|
|
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static int
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srpc_post_passive_rqtbuf(int service, int local, void *buf, int len,
|
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struct lnet_handle_md *mdh, struct srpc_event *ev)
|
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{
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struct lnet_process_id any = { 0 };
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|
|
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any.nid = LNET_NID_ANY;
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any.pid = LNET_PID_ANY;
|
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|
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return srpc_post_passive_rdma(srpc_serv_portal(service),
|
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local, service, buf, len,
|
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LNET_MD_OP_PUT, any, mdh, ev);
|
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}
|
|
|
|
static int
|
|
srpc_service_post_buffer(struct srpc_service_cd *scd, struct srpc_buffer *buf)
|
|
__must_hold(&scd->scd_lock)
|
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{
|
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struct srpc_service *sv = scd->scd_svc;
|
|
struct srpc_msg *msg = &buf->buf_msg;
|
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int rc;
|
|
|
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LNetInvalidateMDHandle(&buf->buf_mdh);
|
|
list_add(&buf->buf_list, &scd->scd_buf_posted);
|
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scd->scd_buf_nposted++;
|
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spin_unlock(&scd->scd_lock);
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|
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rc = srpc_post_passive_rqtbuf(sv->sv_id,
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!srpc_serv_is_framework(sv),
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msg, sizeof(*msg), &buf->buf_mdh,
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&scd->scd_ev);
|
|
|
|
/*
|
|
* At this point, a RPC (new or delayed) may have arrived in
|
|
* msg and its event handler has been called. So we must add
|
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* buf to scd_buf_posted _before_ dropping scd_lock
|
|
*/
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
if (!rc) {
|
|
if (!sv->sv_shuttingdown)
|
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return 0;
|
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|
|
spin_unlock(&scd->scd_lock);
|
|
/*
|
|
* srpc_shutdown_service might have tried to unlink me
|
|
* when my buf_mdh was still invalid
|
|
*/
|
|
LNetMDUnlink(buf->buf_mdh);
|
|
spin_lock(&scd->scd_lock);
|
|
return 0;
|
|
}
|
|
|
|
scd->scd_buf_nposted--;
|
|
if (sv->sv_shuttingdown)
|
|
return rc; /* don't allow to change scd_buf_posted */
|
|
|
|
list_del(&buf->buf_list);
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
LIBCFS_FREE(buf, sizeof(*buf));
|
|
|
|
spin_lock(&scd->scd_lock);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
srpc_add_buffer(struct swi_workitem *wi)
|
|
{
|
|
struct srpc_service_cd *scd = wi->swi_workitem.wi_data;
|
|
struct srpc_buffer *buf;
|
|
int rc = 0;
|
|
|
|
/*
|
|
* it's called by workitem scheduler threads, these threads
|
|
* should have been set CPT affinity, so buffers will be posted
|
|
* on CPT local list of Portal
|
|
*/
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
while (scd->scd_buf_adjust > 0 &&
|
|
!scd->scd_svc->sv_shuttingdown) {
|
|
scd->scd_buf_adjust--; /* consume it */
|
|
scd->scd_buf_posting++;
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
LIBCFS_ALLOC(buf, sizeof(*buf));
|
|
if (!buf) {
|
|
CERROR("Failed to add new buf to service: %s\n",
|
|
scd->scd_svc->sv_name);
|
|
spin_lock(&scd->scd_lock);
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
|
|
spin_lock(&scd->scd_lock);
|
|
if (scd->scd_svc->sv_shuttingdown) {
|
|
spin_unlock(&scd->scd_lock);
|
|
LIBCFS_FREE(buf, sizeof(*buf));
|
|
|
|
spin_lock(&scd->scd_lock);
|
|
rc = -ESHUTDOWN;
|
|
break;
|
|
}
|
|
|
|
rc = srpc_service_post_buffer(scd, buf);
|
|
if (rc)
|
|
break; /* buf has been freed inside */
|
|
|
|
LASSERT(scd->scd_buf_posting > 0);
|
|
scd->scd_buf_posting--;
|
|
scd->scd_buf_total++;
|
|
scd->scd_buf_low = max(2, scd->scd_buf_total / 4);
|
|
}
|
|
|
|
if (rc) {
|
|
scd->scd_buf_err_stamp = ktime_get_real_seconds();
|
|
scd->scd_buf_err = rc;
|
|
|
|
LASSERT(scd->scd_buf_posting > 0);
|
|
scd->scd_buf_posting--;
|
|
}
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
srpc_service_add_buffers(struct srpc_service *sv, int nbuffer)
|
|
{
|
|
struct srpc_service_cd *scd;
|
|
int rc = 0;
|
|
int i;
|
|
|
|
LASSERTF(nbuffer > 0, "nbuffer must be positive: %d\n", nbuffer);
|
|
|
|
cfs_percpt_for_each(scd, i, sv->sv_cpt_data) {
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
scd->scd_buf_err = 0;
|
|
scd->scd_buf_err_stamp = 0;
|
|
scd->scd_buf_posting = 0;
|
|
scd->scd_buf_adjust = nbuffer;
|
|
/* start to post buffers */
|
|
swi_schedule_workitem(&scd->scd_buf_wi);
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
/* framework service only post buffer for one partition */
|
|
if (srpc_serv_is_framework(sv))
|
|
break;
|
|
}
|
|
|
|
cfs_percpt_for_each(scd, i, sv->sv_cpt_data) {
|
|
spin_lock(&scd->scd_lock);
|
|
/*
|
|
* NB: srpc_service_add_buffers() can be called inside
|
|
* thread context of lst_sched_serial, and we don't normally
|
|
* allow to sleep inside thread context of WI scheduler
|
|
* because it will block current scheduler thread from doing
|
|
* anything else, even worse, it could deadlock if it's
|
|
* waiting on result from another WI of the same scheduler.
|
|
* However, it's safe at here because scd_buf_wi is scheduled
|
|
* by thread in a different WI scheduler (lst_sched_test),
|
|
* so we don't have any risk of deadlock, though this could
|
|
* block all WIs pending on lst_sched_serial for a moment
|
|
* which is not good but not fatal.
|
|
*/
|
|
lst_wait_until(scd->scd_buf_err ||
|
|
(!scd->scd_buf_adjust &&
|
|
!scd->scd_buf_posting),
|
|
scd->scd_lock, "waiting for adding buffer\n");
|
|
|
|
if (scd->scd_buf_err && !rc)
|
|
rc = scd->scd_buf_err;
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
void
|
|
srpc_service_remove_buffers(struct srpc_service *sv, int nbuffer)
|
|
{
|
|
struct srpc_service_cd *scd;
|
|
int num;
|
|
int i;
|
|
|
|
LASSERT(!sv->sv_shuttingdown);
|
|
|
|
cfs_percpt_for_each(scd, i, sv->sv_cpt_data) {
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
num = scd->scd_buf_total + scd->scd_buf_posting;
|
|
scd->scd_buf_adjust -= min(nbuffer, num);
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
}
|
|
}
|
|
|
|
/* returns 1 if sv has finished, otherwise 0 */
|
|
int
|
|
srpc_finish_service(struct srpc_service *sv)
|
|
{
|
|
struct srpc_service_cd *scd;
|
|
struct srpc_server_rpc *rpc;
|
|
int i;
|
|
|
|
LASSERT(sv->sv_shuttingdown); /* srpc_shutdown_service called */
|
|
|
|
cfs_percpt_for_each(scd, i, sv->sv_cpt_data) {
|
|
spin_lock(&scd->scd_lock);
|
|
if (!swi_deschedule_workitem(&scd->scd_buf_wi)) {
|
|
spin_unlock(&scd->scd_lock);
|
|
return 0;
|
|
}
|
|
|
|
if (scd->scd_buf_nposted > 0) {
|
|
CDEBUG(D_NET, "waiting for %d posted buffers to unlink\n",
|
|
scd->scd_buf_nposted);
|
|
spin_unlock(&scd->scd_lock);
|
|
return 0;
|
|
}
|
|
|
|
if (list_empty(&scd->scd_rpc_active)) {
|
|
spin_unlock(&scd->scd_lock);
|
|
continue;
|
|
}
|
|
|
|
rpc = list_entry(scd->scd_rpc_active.next,
|
|
struct srpc_server_rpc, srpc_list);
|
|
CNETERR("Active RPC %p on shutdown: sv %s, peer %s, wi %s scheduled %d running %d, ev fired %d type %d status %d lnet %d\n",
|
|
rpc, sv->sv_name, libcfs_id2str(rpc->srpc_peer),
|
|
swi_state2str(rpc->srpc_wi.swi_state),
|
|
rpc->srpc_wi.swi_workitem.wi_scheduled,
|
|
rpc->srpc_wi.swi_workitem.wi_running,
|
|
rpc->srpc_ev.ev_fired, rpc->srpc_ev.ev_type,
|
|
rpc->srpc_ev.ev_status, rpc->srpc_ev.ev_lnet);
|
|
spin_unlock(&scd->scd_lock);
|
|
return 0;
|
|
}
|
|
|
|
/* no lock needed from now on */
|
|
srpc_service_fini(sv);
|
|
return 1;
|
|
}
|
|
|
|
/* called with sv->sv_lock held */
|
|
static void
|
|
srpc_service_recycle_buffer(struct srpc_service_cd *scd,
|
|
struct srpc_buffer *buf)
|
|
__must_hold(&scd->scd_lock)
|
|
{
|
|
if (!scd->scd_svc->sv_shuttingdown && scd->scd_buf_adjust >= 0) {
|
|
if (srpc_service_post_buffer(scd, buf)) {
|
|
CWARN("Failed to post %s buffer\n",
|
|
scd->scd_svc->sv_name);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* service is shutting down, or we want to recycle some buffers */
|
|
scd->scd_buf_total--;
|
|
|
|
if (scd->scd_buf_adjust < 0) {
|
|
scd->scd_buf_adjust++;
|
|
if (scd->scd_buf_adjust < 0 &&
|
|
!scd->scd_buf_total && !scd->scd_buf_posting) {
|
|
CDEBUG(D_INFO,
|
|
"Try to recycle %d buffers but nothing left\n",
|
|
scd->scd_buf_adjust);
|
|
scd->scd_buf_adjust = 0;
|
|
}
|
|
}
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
LIBCFS_FREE(buf, sizeof(*buf));
|
|
spin_lock(&scd->scd_lock);
|
|
}
|
|
|
|
void
|
|
srpc_abort_service(struct srpc_service *sv)
|
|
{
|
|
struct srpc_service_cd *scd;
|
|
struct srpc_server_rpc *rpc;
|
|
int i;
|
|
|
|
CDEBUG(D_NET, "Aborting service: id %d, name %s\n",
|
|
sv->sv_id, sv->sv_name);
|
|
|
|
cfs_percpt_for_each(scd, i, sv->sv_cpt_data) {
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
/*
|
|
* schedule in-flight RPCs to notice the abort, NB:
|
|
* racing with incoming RPCs; complete fix should make test
|
|
* RPCs carry session ID in its headers
|
|
*/
|
|
list_for_each_entry(rpc, &scd->scd_rpc_active, srpc_list) {
|
|
rpc->srpc_aborted = 1;
|
|
swi_schedule_workitem(&rpc->srpc_wi);
|
|
}
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
}
|
|
}
|
|
|
|
void
|
|
srpc_shutdown_service(struct srpc_service *sv)
|
|
{
|
|
struct srpc_service_cd *scd;
|
|
struct srpc_server_rpc *rpc;
|
|
struct srpc_buffer *buf;
|
|
int i;
|
|
|
|
CDEBUG(D_NET, "Shutting down service: id %d, name %s\n",
|
|
sv->sv_id, sv->sv_name);
|
|
|
|
cfs_percpt_for_each(scd, i, sv->sv_cpt_data)
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
sv->sv_shuttingdown = 1; /* i.e. no new active RPC */
|
|
|
|
cfs_percpt_for_each(scd, i, sv->sv_cpt_data)
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
cfs_percpt_for_each(scd, i, sv->sv_cpt_data) {
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
/* schedule in-flight RPCs to notice the shutdown */
|
|
list_for_each_entry(rpc, &scd->scd_rpc_active, srpc_list)
|
|
swi_schedule_workitem(&rpc->srpc_wi);
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
/*
|
|
* OK to traverse scd_buf_posted without lock, since no one
|
|
* touches scd_buf_posted now
|
|
*/
|
|
list_for_each_entry(buf, &scd->scd_buf_posted, buf_list)
|
|
LNetMDUnlink(buf->buf_mdh);
|
|
}
|
|
}
|
|
|
|
static int
|
|
srpc_send_request(struct srpc_client_rpc *rpc)
|
|
{
|
|
struct srpc_event *ev = &rpc->crpc_reqstev;
|
|
int rc;
|
|
|
|
ev->ev_fired = 0;
|
|
ev->ev_data = rpc;
|
|
ev->ev_type = SRPC_REQUEST_SENT;
|
|
|
|
rc = srpc_post_active_rdma(srpc_serv_portal(rpc->crpc_service),
|
|
rpc->crpc_service, &rpc->crpc_reqstmsg,
|
|
sizeof(struct srpc_msg), LNET_MD_OP_PUT,
|
|
rpc->crpc_dest, LNET_NID_ANY,
|
|
&rpc->crpc_reqstmdh, ev);
|
|
if (rc) {
|
|
LASSERT(rc == -ENOMEM);
|
|
ev->ev_fired = 1; /* no more event expected */
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
srpc_prepare_reply(struct srpc_client_rpc *rpc)
|
|
{
|
|
struct srpc_event *ev = &rpc->crpc_replyev;
|
|
__u64 *id = &rpc->crpc_reqstmsg.msg_body.reqst.rpyid;
|
|
int rc;
|
|
|
|
ev->ev_fired = 0;
|
|
ev->ev_data = rpc;
|
|
ev->ev_type = SRPC_REPLY_RCVD;
|
|
|
|
*id = srpc_next_id();
|
|
|
|
rc = srpc_post_passive_rdma(SRPC_RDMA_PORTAL, 0, *id,
|
|
&rpc->crpc_replymsg,
|
|
sizeof(struct srpc_msg),
|
|
LNET_MD_OP_PUT, rpc->crpc_dest,
|
|
&rpc->crpc_replymdh, ev);
|
|
if (rc) {
|
|
LASSERT(rc == -ENOMEM);
|
|
ev->ev_fired = 1; /* no more event expected */
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
srpc_prepare_bulk(struct srpc_client_rpc *rpc)
|
|
{
|
|
struct srpc_bulk *bk = &rpc->crpc_bulk;
|
|
struct srpc_event *ev = &rpc->crpc_bulkev;
|
|
__u64 *id = &rpc->crpc_reqstmsg.msg_body.reqst.bulkid;
|
|
int rc;
|
|
int opt;
|
|
|
|
LASSERT(bk->bk_niov <= LNET_MAX_IOV);
|
|
|
|
if (!bk->bk_niov)
|
|
return 0; /* nothing to do */
|
|
|
|
opt = bk->bk_sink ? LNET_MD_OP_PUT : LNET_MD_OP_GET;
|
|
opt |= LNET_MD_KIOV;
|
|
|
|
ev->ev_fired = 0;
|
|
ev->ev_data = rpc;
|
|
ev->ev_type = SRPC_BULK_REQ_RCVD;
|
|
|
|
*id = srpc_next_id();
|
|
|
|
rc = srpc_post_passive_rdma(SRPC_RDMA_PORTAL, 0, *id,
|
|
&bk->bk_iovs[0], bk->bk_niov, opt,
|
|
rpc->crpc_dest, &bk->bk_mdh, ev);
|
|
if (rc) {
|
|
LASSERT(rc == -ENOMEM);
|
|
ev->ev_fired = 1; /* no more event expected */
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
srpc_do_bulk(struct srpc_server_rpc *rpc)
|
|
{
|
|
struct srpc_event *ev = &rpc->srpc_ev;
|
|
struct srpc_bulk *bk = rpc->srpc_bulk;
|
|
__u64 id = rpc->srpc_reqstbuf->buf_msg.msg_body.reqst.bulkid;
|
|
int rc;
|
|
int opt;
|
|
|
|
LASSERT(bk);
|
|
|
|
opt = bk->bk_sink ? LNET_MD_OP_GET : LNET_MD_OP_PUT;
|
|
opt |= LNET_MD_KIOV;
|
|
|
|
ev->ev_fired = 0;
|
|
ev->ev_data = rpc;
|
|
ev->ev_type = bk->bk_sink ? SRPC_BULK_GET_RPLD : SRPC_BULK_PUT_SENT;
|
|
|
|
rc = srpc_post_active_rdma(SRPC_RDMA_PORTAL, id,
|
|
&bk->bk_iovs[0], bk->bk_niov, opt,
|
|
rpc->srpc_peer, rpc->srpc_self,
|
|
&bk->bk_mdh, ev);
|
|
if (rc)
|
|
ev->ev_fired = 1; /* no more event expected */
|
|
return rc;
|
|
}
|
|
|
|
/* only called from srpc_handle_rpc */
|
|
static void
|
|
srpc_server_rpc_done(struct srpc_server_rpc *rpc, int status)
|
|
{
|
|
struct srpc_service_cd *scd = rpc->srpc_scd;
|
|
struct srpc_service *sv = scd->scd_svc;
|
|
struct srpc_buffer *buffer;
|
|
|
|
LASSERT(status || rpc->srpc_wi.swi_state == SWI_STATE_DONE);
|
|
|
|
rpc->srpc_status = status;
|
|
|
|
CDEBUG_LIMIT(!status ? D_NET : D_NETERROR,
|
|
"Server RPC %p done: service %s, peer %s, status %s:%d\n",
|
|
rpc, sv->sv_name, libcfs_id2str(rpc->srpc_peer),
|
|
swi_state2str(rpc->srpc_wi.swi_state), status);
|
|
|
|
if (status) {
|
|
spin_lock(&srpc_data.rpc_glock);
|
|
srpc_data.rpc_counters.rpcs_dropped++;
|
|
spin_unlock(&srpc_data.rpc_glock);
|
|
}
|
|
|
|
if (rpc->srpc_done)
|
|
(*rpc->srpc_done) (rpc);
|
|
LASSERT(!rpc->srpc_bulk);
|
|
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
if (rpc->srpc_reqstbuf) {
|
|
/*
|
|
* NB might drop sv_lock in srpc_service_recycle_buffer, but
|
|
* sv won't go away for scd_rpc_active must not be empty
|
|
*/
|
|
srpc_service_recycle_buffer(scd, rpc->srpc_reqstbuf);
|
|
rpc->srpc_reqstbuf = NULL;
|
|
}
|
|
|
|
list_del(&rpc->srpc_list); /* from scd->scd_rpc_active */
|
|
|
|
/*
|
|
* No one can schedule me now since:
|
|
* - I'm not on scd_rpc_active.
|
|
* - all LNet events have been fired.
|
|
* Cancel pending schedules and prevent future schedule attempts:
|
|
*/
|
|
LASSERT(rpc->srpc_ev.ev_fired);
|
|
swi_exit_workitem(&rpc->srpc_wi);
|
|
|
|
if (!sv->sv_shuttingdown && !list_empty(&scd->scd_buf_blocked)) {
|
|
buffer = list_entry(scd->scd_buf_blocked.next,
|
|
struct srpc_buffer, buf_list);
|
|
list_del(&buffer->buf_list);
|
|
|
|
srpc_init_server_rpc(rpc, scd, buffer);
|
|
list_add_tail(&rpc->srpc_list, &scd->scd_rpc_active);
|
|
swi_schedule_workitem(&rpc->srpc_wi);
|
|
} else {
|
|
list_add(&rpc->srpc_list, &scd->scd_rpc_free);
|
|
}
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
}
|
|
|
|
/* handles an incoming RPC */
|
|
int
|
|
srpc_handle_rpc(struct swi_workitem *wi)
|
|
{
|
|
struct srpc_server_rpc *rpc = wi->swi_workitem.wi_data;
|
|
struct srpc_service_cd *scd = rpc->srpc_scd;
|
|
struct srpc_service *sv = scd->scd_svc;
|
|
struct srpc_event *ev = &rpc->srpc_ev;
|
|
int rc = 0;
|
|
|
|
LASSERT(wi == &rpc->srpc_wi);
|
|
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
if (sv->sv_shuttingdown || rpc->srpc_aborted) {
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
if (rpc->srpc_bulk)
|
|
LNetMDUnlink(rpc->srpc_bulk->bk_mdh);
|
|
LNetMDUnlink(rpc->srpc_replymdh);
|
|
|
|
if (ev->ev_fired) { /* no more event, OK to finish */
|
|
srpc_server_rpc_done(rpc, -ESHUTDOWN);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
switch (wi->swi_state) {
|
|
default:
|
|
LBUG();
|
|
case SWI_STATE_NEWBORN: {
|
|
struct srpc_msg *msg;
|
|
struct srpc_generic_reply *reply;
|
|
|
|
msg = &rpc->srpc_reqstbuf->buf_msg;
|
|
reply = &rpc->srpc_replymsg.msg_body.reply;
|
|
|
|
if (!msg->msg_magic) {
|
|
/* moaned already in srpc_lnet_ev_handler */
|
|
srpc_server_rpc_done(rpc, EBADMSG);
|
|
return 1;
|
|
}
|
|
|
|
srpc_unpack_msg_hdr(msg);
|
|
if (msg->msg_version != SRPC_MSG_VERSION) {
|
|
CWARN("Version mismatch: %u, %u expected, from %s\n",
|
|
msg->msg_version, SRPC_MSG_VERSION,
|
|
libcfs_id2str(rpc->srpc_peer));
|
|
reply->status = EPROTO;
|
|
/* drop through and send reply */
|
|
} else {
|
|
reply->status = 0;
|
|
rc = (*sv->sv_handler)(rpc);
|
|
LASSERT(!reply->status || !rpc->srpc_bulk);
|
|
if (rc) {
|
|
srpc_server_rpc_done(rpc, rc);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
wi->swi_state = SWI_STATE_BULK_STARTED;
|
|
|
|
if (rpc->srpc_bulk) {
|
|
rc = srpc_do_bulk(rpc);
|
|
if (!rc)
|
|
return 0; /* wait for bulk */
|
|
|
|
LASSERT(ev->ev_fired);
|
|
ev->ev_status = rc;
|
|
}
|
|
}
|
|
case SWI_STATE_BULK_STARTED:
|
|
LASSERT(!rpc->srpc_bulk || ev->ev_fired);
|
|
|
|
if (rpc->srpc_bulk) {
|
|
rc = ev->ev_status;
|
|
|
|
if (sv->sv_bulk_ready)
|
|
rc = (*sv->sv_bulk_ready) (rpc, rc);
|
|
|
|
if (rc) {
|
|
srpc_server_rpc_done(rpc, rc);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
wi->swi_state = SWI_STATE_REPLY_SUBMITTED;
|
|
rc = srpc_send_reply(rpc);
|
|
if (!rc)
|
|
return 0; /* wait for reply */
|
|
srpc_server_rpc_done(rpc, rc);
|
|
return 1;
|
|
|
|
case SWI_STATE_REPLY_SUBMITTED:
|
|
if (!ev->ev_fired) {
|
|
CERROR("RPC %p: bulk %p, service %d\n",
|
|
rpc, rpc->srpc_bulk, sv->sv_id);
|
|
CERROR("Event: status %d, type %d, lnet %d\n",
|
|
ev->ev_status, ev->ev_type, ev->ev_lnet);
|
|
LASSERT(ev->ev_fired);
|
|
}
|
|
|
|
wi->swi_state = SWI_STATE_DONE;
|
|
srpc_server_rpc_done(rpc, ev->ev_status);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
srpc_client_rpc_expired(void *data)
|
|
{
|
|
struct srpc_client_rpc *rpc = data;
|
|
|
|
CWARN("Client RPC expired: service %d, peer %s, timeout %d.\n",
|
|
rpc->crpc_service, libcfs_id2str(rpc->crpc_dest),
|
|
rpc->crpc_timeout);
|
|
|
|
spin_lock(&rpc->crpc_lock);
|
|
|
|
rpc->crpc_timeout = 0;
|
|
srpc_abort_rpc(rpc, -ETIMEDOUT);
|
|
|
|
spin_unlock(&rpc->crpc_lock);
|
|
|
|
spin_lock(&srpc_data.rpc_glock);
|
|
srpc_data.rpc_counters.rpcs_expired++;
|
|
spin_unlock(&srpc_data.rpc_glock);
|
|
}
|
|
|
|
static void
|
|
srpc_add_client_rpc_timer(struct srpc_client_rpc *rpc)
|
|
{
|
|
struct stt_timer *timer = &rpc->crpc_timer;
|
|
|
|
if (!rpc->crpc_timeout)
|
|
return;
|
|
|
|
INIT_LIST_HEAD(&timer->stt_list);
|
|
timer->stt_data = rpc;
|
|
timer->stt_func = srpc_client_rpc_expired;
|
|
timer->stt_expires = ktime_get_real_seconds() + rpc->crpc_timeout;
|
|
stt_add_timer(timer);
|
|
}
|
|
|
|
/*
|
|
* Called with rpc->crpc_lock held.
|
|
*
|
|
* Upon exit the RPC expiry timer is not queued and the handler is not
|
|
* running on any CPU.
|
|
*/
|
|
static void
|
|
srpc_del_client_rpc_timer(struct srpc_client_rpc *rpc)
|
|
{
|
|
/* timer not planted or already exploded */
|
|
if (!rpc->crpc_timeout)
|
|
return;
|
|
|
|
/* timer successfully defused */
|
|
if (stt_del_timer(&rpc->crpc_timer))
|
|
return;
|
|
|
|
/* timer detonated, wait for it to explode */
|
|
while (rpc->crpc_timeout) {
|
|
spin_unlock(&rpc->crpc_lock);
|
|
|
|
schedule();
|
|
|
|
spin_lock(&rpc->crpc_lock);
|
|
}
|
|
}
|
|
|
|
static void
|
|
srpc_client_rpc_done(struct srpc_client_rpc *rpc, int status)
|
|
{
|
|
struct swi_workitem *wi = &rpc->crpc_wi;
|
|
|
|
LASSERT(status || wi->swi_state == SWI_STATE_DONE);
|
|
|
|
spin_lock(&rpc->crpc_lock);
|
|
|
|
rpc->crpc_closed = 1;
|
|
if (!rpc->crpc_status)
|
|
rpc->crpc_status = status;
|
|
|
|
srpc_del_client_rpc_timer(rpc);
|
|
|
|
CDEBUG_LIMIT(!status ? D_NET : D_NETERROR,
|
|
"Client RPC done: service %d, peer %s, status %s:%d:%d\n",
|
|
rpc->crpc_service, libcfs_id2str(rpc->crpc_dest),
|
|
swi_state2str(wi->swi_state), rpc->crpc_aborted, status);
|
|
|
|
/*
|
|
* No one can schedule me now since:
|
|
* - RPC timer has been defused.
|
|
* - all LNet events have been fired.
|
|
* - crpc_closed has been set, preventing srpc_abort_rpc from
|
|
* scheduling me.
|
|
* Cancel pending schedules and prevent future schedule attempts:
|
|
*/
|
|
LASSERT(!srpc_event_pending(rpc));
|
|
swi_exit_workitem(wi);
|
|
|
|
spin_unlock(&rpc->crpc_lock);
|
|
|
|
(*rpc->crpc_done)(rpc);
|
|
}
|
|
|
|
/* sends an outgoing RPC */
|
|
int
|
|
srpc_send_rpc(struct swi_workitem *wi)
|
|
{
|
|
int rc = 0;
|
|
struct srpc_client_rpc *rpc;
|
|
struct srpc_msg *reply;
|
|
int do_bulk;
|
|
|
|
LASSERT(wi);
|
|
|
|
rpc = wi->swi_workitem.wi_data;
|
|
|
|
LASSERT(rpc);
|
|
LASSERT(wi == &rpc->crpc_wi);
|
|
|
|
reply = &rpc->crpc_replymsg;
|
|
do_bulk = rpc->crpc_bulk.bk_niov > 0;
|
|
|
|
spin_lock(&rpc->crpc_lock);
|
|
|
|
if (rpc->crpc_aborted) {
|
|
spin_unlock(&rpc->crpc_lock);
|
|
goto abort;
|
|
}
|
|
|
|
spin_unlock(&rpc->crpc_lock);
|
|
|
|
switch (wi->swi_state) {
|
|
default:
|
|
LBUG();
|
|
case SWI_STATE_NEWBORN:
|
|
LASSERT(!srpc_event_pending(rpc));
|
|
|
|
rc = srpc_prepare_reply(rpc);
|
|
if (rc) {
|
|
srpc_client_rpc_done(rpc, rc);
|
|
return 1;
|
|
}
|
|
|
|
rc = srpc_prepare_bulk(rpc);
|
|
if (rc)
|
|
break;
|
|
|
|
wi->swi_state = SWI_STATE_REQUEST_SUBMITTED;
|
|
rc = srpc_send_request(rpc);
|
|
break;
|
|
|
|
case SWI_STATE_REQUEST_SUBMITTED:
|
|
/*
|
|
* CAVEAT EMPTOR: rqtev, rpyev, and bulkev may come in any
|
|
* order; however, they're processed in a strict order:
|
|
* rqt, rpy, and bulk.
|
|
*/
|
|
if (!rpc->crpc_reqstev.ev_fired)
|
|
break;
|
|
|
|
rc = rpc->crpc_reqstev.ev_status;
|
|
if (rc)
|
|
break;
|
|
|
|
wi->swi_state = SWI_STATE_REQUEST_SENT;
|
|
/* perhaps more events, fall thru */
|
|
case SWI_STATE_REQUEST_SENT: {
|
|
enum srpc_msg_type type = srpc_service2reply(rpc->crpc_service);
|
|
|
|
if (!rpc->crpc_replyev.ev_fired)
|
|
break;
|
|
|
|
rc = rpc->crpc_replyev.ev_status;
|
|
if (rc)
|
|
break;
|
|
|
|
srpc_unpack_msg_hdr(reply);
|
|
if (reply->msg_type != type ||
|
|
(reply->msg_magic != SRPC_MSG_MAGIC &&
|
|
reply->msg_magic != __swab32(SRPC_MSG_MAGIC))) {
|
|
CWARN("Bad message from %s: type %u (%d expected), magic %u (%d expected).\n",
|
|
libcfs_id2str(rpc->crpc_dest),
|
|
reply->msg_type, type,
|
|
reply->msg_magic, SRPC_MSG_MAGIC);
|
|
rc = -EBADMSG;
|
|
break;
|
|
}
|
|
|
|
if (do_bulk && reply->msg_body.reply.status) {
|
|
CWARN("Remote error %d at %s, unlink bulk buffer in case peer didn't initiate bulk transfer\n",
|
|
reply->msg_body.reply.status,
|
|
libcfs_id2str(rpc->crpc_dest));
|
|
LNetMDUnlink(rpc->crpc_bulk.bk_mdh);
|
|
}
|
|
|
|
wi->swi_state = SWI_STATE_REPLY_RECEIVED;
|
|
}
|
|
case SWI_STATE_REPLY_RECEIVED:
|
|
if (do_bulk && !rpc->crpc_bulkev.ev_fired)
|
|
break;
|
|
|
|
rc = do_bulk ? rpc->crpc_bulkev.ev_status : 0;
|
|
|
|
/*
|
|
* Bulk buffer was unlinked due to remote error. Clear error
|
|
* since reply buffer still contains valid data.
|
|
* NB rpc->crpc_done shouldn't look into bulk data in case of
|
|
* remote error.
|
|
*/
|
|
if (do_bulk && rpc->crpc_bulkev.ev_lnet == LNET_EVENT_UNLINK &&
|
|
!rpc->crpc_status && reply->msg_body.reply.status)
|
|
rc = 0;
|
|
|
|
wi->swi_state = SWI_STATE_DONE;
|
|
srpc_client_rpc_done(rpc, rc);
|
|
return 1;
|
|
}
|
|
|
|
if (rc) {
|
|
spin_lock(&rpc->crpc_lock);
|
|
srpc_abort_rpc(rpc, rc);
|
|
spin_unlock(&rpc->crpc_lock);
|
|
}
|
|
|
|
abort:
|
|
if (rpc->crpc_aborted) {
|
|
LNetMDUnlink(rpc->crpc_reqstmdh);
|
|
LNetMDUnlink(rpc->crpc_replymdh);
|
|
LNetMDUnlink(rpc->crpc_bulk.bk_mdh);
|
|
|
|
if (!srpc_event_pending(rpc)) {
|
|
srpc_client_rpc_done(rpc, -EINTR);
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct srpc_client_rpc *
|
|
srpc_create_client_rpc(struct lnet_process_id peer, int service,
|
|
int nbulkiov, int bulklen,
|
|
void (*rpc_done)(struct srpc_client_rpc *),
|
|
void (*rpc_fini)(struct srpc_client_rpc *), void *priv)
|
|
{
|
|
struct srpc_client_rpc *rpc;
|
|
|
|
LIBCFS_ALLOC(rpc, offsetof(struct srpc_client_rpc,
|
|
crpc_bulk.bk_iovs[nbulkiov]));
|
|
if (!rpc)
|
|
return NULL;
|
|
|
|
srpc_init_client_rpc(rpc, peer, service, nbulkiov,
|
|
bulklen, rpc_done, rpc_fini, priv);
|
|
return rpc;
|
|
}
|
|
|
|
/* called with rpc->crpc_lock held */
|
|
void
|
|
srpc_abort_rpc(struct srpc_client_rpc *rpc, int why)
|
|
{
|
|
LASSERT(why);
|
|
|
|
if (rpc->crpc_aborted || /* already aborted */
|
|
rpc->crpc_closed) /* callback imminent */
|
|
return;
|
|
|
|
CDEBUG(D_NET, "Aborting RPC: service %d, peer %s, state %s, why %d\n",
|
|
rpc->crpc_service, libcfs_id2str(rpc->crpc_dest),
|
|
swi_state2str(rpc->crpc_wi.swi_state), why);
|
|
|
|
rpc->crpc_aborted = 1;
|
|
rpc->crpc_status = why;
|
|
swi_schedule_workitem(&rpc->crpc_wi);
|
|
}
|
|
|
|
/* called with rpc->crpc_lock held */
|
|
void
|
|
srpc_post_rpc(struct srpc_client_rpc *rpc)
|
|
{
|
|
LASSERT(!rpc->crpc_aborted);
|
|
LASSERT(srpc_data.rpc_state == SRPC_STATE_RUNNING);
|
|
|
|
CDEBUG(D_NET, "Posting RPC: peer %s, service %d, timeout %d\n",
|
|
libcfs_id2str(rpc->crpc_dest), rpc->crpc_service,
|
|
rpc->crpc_timeout);
|
|
|
|
srpc_add_client_rpc_timer(rpc);
|
|
swi_schedule_workitem(&rpc->crpc_wi);
|
|
}
|
|
|
|
int
|
|
srpc_send_reply(struct srpc_server_rpc *rpc)
|
|
{
|
|
struct srpc_event *ev = &rpc->srpc_ev;
|
|
struct srpc_msg *msg = &rpc->srpc_replymsg;
|
|
struct srpc_buffer *buffer = rpc->srpc_reqstbuf;
|
|
struct srpc_service_cd *scd = rpc->srpc_scd;
|
|
struct srpc_service *sv = scd->scd_svc;
|
|
__u64 rpyid;
|
|
int rc;
|
|
|
|
LASSERT(buffer);
|
|
rpyid = buffer->buf_msg.msg_body.reqst.rpyid;
|
|
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
if (!sv->sv_shuttingdown && !srpc_serv_is_framework(sv)) {
|
|
/*
|
|
* Repost buffer before replying since test client
|
|
* might send me another RPC once it gets the reply
|
|
*/
|
|
if (srpc_service_post_buffer(scd, buffer))
|
|
CWARN("Failed to repost %s buffer\n", sv->sv_name);
|
|
rpc->srpc_reqstbuf = NULL;
|
|
}
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
ev->ev_fired = 0;
|
|
ev->ev_data = rpc;
|
|
ev->ev_type = SRPC_REPLY_SENT;
|
|
|
|
msg->msg_magic = SRPC_MSG_MAGIC;
|
|
msg->msg_version = SRPC_MSG_VERSION;
|
|
msg->msg_type = srpc_service2reply(sv->sv_id);
|
|
|
|
rc = srpc_post_active_rdma(SRPC_RDMA_PORTAL, rpyid, msg,
|
|
sizeof(*msg), LNET_MD_OP_PUT,
|
|
rpc->srpc_peer, rpc->srpc_self,
|
|
&rpc->srpc_replymdh, ev);
|
|
if (rc)
|
|
ev->ev_fired = 1; /* no more event expected */
|
|
return rc;
|
|
}
|
|
|
|
/* when in kernel always called with LNET_LOCK() held, and in thread context */
|
|
static void
|
|
srpc_lnet_ev_handler(struct lnet_event *ev)
|
|
{
|
|
struct srpc_service_cd *scd;
|
|
struct srpc_event *rpcev = ev->md.user_ptr;
|
|
struct srpc_client_rpc *crpc;
|
|
struct srpc_server_rpc *srpc;
|
|
struct srpc_buffer *buffer;
|
|
struct srpc_service *sv;
|
|
struct srpc_msg *msg;
|
|
enum srpc_msg_type type;
|
|
|
|
LASSERT(!in_interrupt());
|
|
|
|
if (ev->status) {
|
|
__u32 errors;
|
|
|
|
spin_lock(&srpc_data.rpc_glock);
|
|
if (ev->status != -ECANCELED) /* cancellation is not error */
|
|
srpc_data.rpc_counters.errors++;
|
|
errors = srpc_data.rpc_counters.errors;
|
|
spin_unlock(&srpc_data.rpc_glock);
|
|
|
|
CNETERR("LNet event status %d type %d, RPC errors %u\n",
|
|
ev->status, ev->type, errors);
|
|
}
|
|
|
|
rpcev->ev_lnet = ev->type;
|
|
|
|
switch (rpcev->ev_type) {
|
|
default:
|
|
CERROR("Unknown event: status %d, type %d, lnet %d\n",
|
|
rpcev->ev_status, rpcev->ev_type, rpcev->ev_lnet);
|
|
LBUG();
|
|
case SRPC_REQUEST_SENT:
|
|
if (!ev->status && ev->type != LNET_EVENT_UNLINK) {
|
|
spin_lock(&srpc_data.rpc_glock);
|
|
srpc_data.rpc_counters.rpcs_sent++;
|
|
spin_unlock(&srpc_data.rpc_glock);
|
|
}
|
|
case SRPC_REPLY_RCVD:
|
|
case SRPC_BULK_REQ_RCVD:
|
|
crpc = rpcev->ev_data;
|
|
|
|
if (rpcev != &crpc->crpc_reqstev &&
|
|
rpcev != &crpc->crpc_replyev &&
|
|
rpcev != &crpc->crpc_bulkev) {
|
|
CERROR("rpcev %p, crpc %p, reqstev %p, replyev %p, bulkev %p\n",
|
|
rpcev, crpc, &crpc->crpc_reqstev,
|
|
&crpc->crpc_replyev, &crpc->crpc_bulkev);
|
|
CERROR("Bad event: status %d, type %d, lnet %d\n",
|
|
rpcev->ev_status, rpcev->ev_type, rpcev->ev_lnet);
|
|
LBUG();
|
|
}
|
|
|
|
spin_lock(&crpc->crpc_lock);
|
|
|
|
LASSERT(!rpcev->ev_fired);
|
|
rpcev->ev_fired = 1;
|
|
rpcev->ev_status = (ev->type == LNET_EVENT_UNLINK) ?
|
|
-EINTR : ev->status;
|
|
swi_schedule_workitem(&crpc->crpc_wi);
|
|
|
|
spin_unlock(&crpc->crpc_lock);
|
|
break;
|
|
|
|
case SRPC_REQUEST_RCVD:
|
|
scd = rpcev->ev_data;
|
|
sv = scd->scd_svc;
|
|
|
|
LASSERT(rpcev == &scd->scd_ev);
|
|
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
LASSERT(ev->unlinked);
|
|
LASSERT(ev->type == LNET_EVENT_PUT ||
|
|
ev->type == LNET_EVENT_UNLINK);
|
|
LASSERT(ev->type != LNET_EVENT_UNLINK ||
|
|
sv->sv_shuttingdown);
|
|
|
|
buffer = container_of(ev->md.start, struct srpc_buffer, buf_msg);
|
|
buffer->buf_peer = ev->initiator;
|
|
buffer->buf_self = ev->target.nid;
|
|
|
|
LASSERT(scd->scd_buf_nposted > 0);
|
|
scd->scd_buf_nposted--;
|
|
|
|
if (sv->sv_shuttingdown) {
|
|
/*
|
|
* Leave buffer on scd->scd_buf_nposted since
|
|
* srpc_finish_service needs to traverse it.
|
|
*/
|
|
spin_unlock(&scd->scd_lock);
|
|
break;
|
|
}
|
|
|
|
if (scd->scd_buf_err_stamp &&
|
|
scd->scd_buf_err_stamp < ktime_get_real_seconds()) {
|
|
/* re-enable adding buffer */
|
|
scd->scd_buf_err_stamp = 0;
|
|
scd->scd_buf_err = 0;
|
|
}
|
|
|
|
if (!scd->scd_buf_err && /* adding buffer is enabled */
|
|
!scd->scd_buf_adjust &&
|
|
scd->scd_buf_nposted < scd->scd_buf_low) {
|
|
scd->scd_buf_adjust = max(scd->scd_buf_total / 2,
|
|
SFW_TEST_WI_MIN);
|
|
swi_schedule_workitem(&scd->scd_buf_wi);
|
|
}
|
|
|
|
list_del(&buffer->buf_list); /* from scd->scd_buf_posted */
|
|
msg = &buffer->buf_msg;
|
|
type = srpc_service2request(sv->sv_id);
|
|
|
|
if (ev->status || ev->mlength != sizeof(*msg) ||
|
|
(msg->msg_type != type &&
|
|
msg->msg_type != __swab32(type)) ||
|
|
(msg->msg_magic != SRPC_MSG_MAGIC &&
|
|
msg->msg_magic != __swab32(SRPC_MSG_MAGIC))) {
|
|
CERROR("Dropping RPC (%s) from %s: status %d mlength %d type %u magic %u.\n",
|
|
sv->sv_name, libcfs_id2str(ev->initiator),
|
|
ev->status, ev->mlength,
|
|
msg->msg_type, msg->msg_magic);
|
|
|
|
/*
|
|
* NB can't call srpc_service_recycle_buffer here since
|
|
* it may call LNetM[DE]Attach. The invalid magic tells
|
|
* srpc_handle_rpc to drop this RPC
|
|
*/
|
|
msg->msg_magic = 0;
|
|
}
|
|
|
|
if (!list_empty(&scd->scd_rpc_free)) {
|
|
srpc = list_entry(scd->scd_rpc_free.next,
|
|
struct srpc_server_rpc,
|
|
srpc_list);
|
|
list_del(&srpc->srpc_list);
|
|
|
|
srpc_init_server_rpc(srpc, scd, buffer);
|
|
list_add_tail(&srpc->srpc_list,
|
|
&scd->scd_rpc_active);
|
|
swi_schedule_workitem(&srpc->srpc_wi);
|
|
} else {
|
|
list_add_tail(&buffer->buf_list,
|
|
&scd->scd_buf_blocked);
|
|
}
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
|
|
spin_lock(&srpc_data.rpc_glock);
|
|
srpc_data.rpc_counters.rpcs_rcvd++;
|
|
spin_unlock(&srpc_data.rpc_glock);
|
|
break;
|
|
|
|
case SRPC_BULK_GET_RPLD:
|
|
LASSERT(ev->type == LNET_EVENT_SEND ||
|
|
ev->type == LNET_EVENT_REPLY ||
|
|
ev->type == LNET_EVENT_UNLINK);
|
|
|
|
if (!ev->unlinked)
|
|
break; /* wait for final event */
|
|
|
|
case SRPC_BULK_PUT_SENT:
|
|
if (!ev->status && ev->type != LNET_EVENT_UNLINK) {
|
|
spin_lock(&srpc_data.rpc_glock);
|
|
|
|
if (rpcev->ev_type == SRPC_BULK_GET_RPLD)
|
|
srpc_data.rpc_counters.bulk_get += ev->mlength;
|
|
else
|
|
srpc_data.rpc_counters.bulk_put += ev->mlength;
|
|
|
|
spin_unlock(&srpc_data.rpc_glock);
|
|
}
|
|
case SRPC_REPLY_SENT:
|
|
srpc = rpcev->ev_data;
|
|
scd = srpc->srpc_scd;
|
|
|
|
LASSERT(rpcev == &srpc->srpc_ev);
|
|
|
|
spin_lock(&scd->scd_lock);
|
|
|
|
rpcev->ev_fired = 1;
|
|
rpcev->ev_status = (ev->type == LNET_EVENT_UNLINK) ?
|
|
-EINTR : ev->status;
|
|
swi_schedule_workitem(&srpc->srpc_wi);
|
|
|
|
spin_unlock(&scd->scd_lock);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int
|
|
srpc_startup(void)
|
|
{
|
|
int rc;
|
|
|
|
memset(&srpc_data, 0, sizeof(struct smoketest_rpc));
|
|
spin_lock_init(&srpc_data.rpc_glock);
|
|
|
|
/* 1 second pause to avoid timestamp reuse */
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
schedule_timeout(cfs_time_seconds(1));
|
|
srpc_data.rpc_matchbits = ((__u64)ktime_get_real_seconds()) << 48;
|
|
|
|
srpc_data.rpc_state = SRPC_STATE_NONE;
|
|
|
|
rc = LNetNIInit(LNET_PID_LUSTRE);
|
|
if (rc < 0) {
|
|
CERROR("LNetNIInit() has failed: %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
srpc_data.rpc_state = SRPC_STATE_NI_INIT;
|
|
|
|
LNetInvalidateEQHandle(&srpc_data.rpc_lnet_eq);
|
|
rc = LNetEQAlloc(0, srpc_lnet_ev_handler, &srpc_data.rpc_lnet_eq);
|
|
if (rc) {
|
|
CERROR("LNetEQAlloc() has failed: %d\n", rc);
|
|
goto bail;
|
|
}
|
|
|
|
rc = LNetSetLazyPortal(SRPC_FRAMEWORK_REQUEST_PORTAL);
|
|
LASSERT(!rc);
|
|
rc = LNetSetLazyPortal(SRPC_REQUEST_PORTAL);
|
|
LASSERT(!rc);
|
|
|
|
srpc_data.rpc_state = SRPC_STATE_EQ_INIT;
|
|
|
|
rc = stt_startup();
|
|
|
|
bail:
|
|
if (rc)
|
|
srpc_shutdown();
|
|
else
|
|
srpc_data.rpc_state = SRPC_STATE_RUNNING;
|
|
|
|
return rc;
|
|
}
|
|
|
|
void
|
|
srpc_shutdown(void)
|
|
{
|
|
int i;
|
|
int rc;
|
|
int state;
|
|
|
|
state = srpc_data.rpc_state;
|
|
srpc_data.rpc_state = SRPC_STATE_STOPPING;
|
|
|
|
switch (state) {
|
|
default:
|
|
LBUG();
|
|
case SRPC_STATE_RUNNING:
|
|
spin_lock(&srpc_data.rpc_glock);
|
|
|
|
for (i = 0; i <= SRPC_SERVICE_MAX_ID; i++) {
|
|
struct srpc_service *sv = srpc_data.rpc_services[i];
|
|
|
|
LASSERTF(!sv, "service not empty: id %d, name %s\n",
|
|
i, sv->sv_name);
|
|
}
|
|
|
|
spin_unlock(&srpc_data.rpc_glock);
|
|
|
|
stt_shutdown();
|
|
|
|
case SRPC_STATE_EQ_INIT:
|
|
rc = LNetClearLazyPortal(SRPC_FRAMEWORK_REQUEST_PORTAL);
|
|
rc = LNetClearLazyPortal(SRPC_REQUEST_PORTAL);
|
|
LASSERT(!rc);
|
|
rc = LNetEQFree(srpc_data.rpc_lnet_eq);
|
|
LASSERT(!rc); /* the EQ should have no user by now */
|
|
|
|
case SRPC_STATE_NI_INIT:
|
|
LNetNIFini();
|
|
}
|
|
}
|