diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/staging/lustre/lnet/selftest/rpc.c | 1682 |
1 files changed, 0 insertions, 1682 deletions
diff --git a/drivers/staging/lustre/lnet/selftest/rpc.c b/drivers/staging/lustre/lnet/selftest/rpc.c deleted file mode 100644 index 9613b0a77007..000000000000 --- a/drivers/staging/lustre/lnet/selftest/rpc.c +++ /dev/null @@ -1,1682 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2012, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lnet/selftest/rpc.c - * - * Author: Isaac Huang <isaac@clusterfs.com> - * - * 2012-05-13: Liang Zhen <liang@whamcloud.com> - * - percpt data for service to improve smp performance - * - code cleanup - */ - -#define DEBUG_SUBSYSTEM S_LNET - -#include "selftest.h" - -enum srpc_state { - SRPC_STATE_NONE, - SRPC_STATE_NI_INIT, - SRPC_STATE_EQ_INIT, - SRPC_STATE_RUNNING, - SRPC_STATE_STOPPING, -}; - -static struct smoketest_rpc { - spinlock_t rpc_glock; /* global lock */ - struct srpc_service *rpc_services[SRPC_SERVICE_MAX_ID + 1]; - struct lnet_handle_eq rpc_lnet_eq; /* _the_ LNet event queue */ - enum srpc_state rpc_state; - struct srpc_counters rpc_counters; - __u64 rpc_matchbits; /* matchbits counter */ -} srpc_data; - -static inline int -srpc_serv_portal(int svc_id) -{ - return svc_id < SRPC_FRAMEWORK_SERVICE_MAX_ID ? - SRPC_FRAMEWORK_REQUEST_PORTAL : SRPC_REQUEST_PORTAL; -} - -/* forward ref's */ -void srpc_handle_rpc(struct swi_workitem *wi); - -void srpc_get_counters(struct srpc_counters *cnt) -{ - spin_lock(&srpc_data.rpc_glock); - *cnt = srpc_data.rpc_counters; - spin_unlock(&srpc_data.rpc_glock); -} - -void srpc_set_counters(const struct srpc_counters *cnt) -{ - spin_lock(&srpc_data.rpc_glock); - srpc_data.rpc_counters = *cnt; - spin_unlock(&srpc_data.rpc_glock); -} - -static int -srpc_add_bulk_page(struct srpc_bulk *bk, struct page *pg, int i, int off, - int nob) -{ - LASSERT(off < PAGE_SIZE); - LASSERT(nob > 0 && nob <= PAGE_SIZE); - - bk->bk_iovs[i].bv_offset = off; - bk->bk_iovs[i].bv_page = pg; - bk->bk_iovs[i].bv_len = nob; - return nob; -} - -void -srpc_free_bulk(struct srpc_bulk *bk) -{ - int i; - struct page *pg; - - LASSERT(bk); - - for (i = 0; i < bk->bk_niov; i++) { - pg = bk->bk_iovs[i].bv_page; - if (!pg) - break; - - __free_page(pg); - } - - kfree(bk); -} - -struct srpc_bulk * -srpc_alloc_bulk(int cpt, unsigned int bulk_off, unsigned int bulk_npg, - unsigned int bulk_len, int sink) -{ - struct srpc_bulk *bk; - int i; - - LASSERT(bulk_npg > 0 && bulk_npg <= LNET_MAX_IOV); - - bk = kzalloc_cpt(offsetof(struct srpc_bulk, bk_iovs[bulk_npg]), - GFP_KERNEL, cpt); - if (!bk) { - CERROR("Can't allocate descriptor for %d pages\n", bulk_npg); - return NULL; - } - - memset(bk, 0, offsetof(struct srpc_bulk, bk_iovs[bulk_npg])); - bk->bk_sink = sink; - bk->bk_len = bulk_len; - bk->bk_niov = bulk_npg; - - for (i = 0; i < bulk_npg; i++) { - struct page *pg; - int nob; - - pg = alloc_pages_node(cfs_cpt_spread_node(lnet_cpt_table(), cpt), - GFP_KERNEL, 0); - if (!pg) { - CERROR("Can't allocate page %d of %d\n", i, bulk_npg); - srpc_free_bulk(bk); - return NULL; - } - - nob = min_t(unsigned int, bulk_off + bulk_len, PAGE_SIZE) - - bulk_off; - srpc_add_bulk_page(bk, pg, i, bulk_off, nob); - bulk_len -= nob; - bulk_off = 0; - } - - return bk; -} - -static inline __u64 -srpc_next_id(void) -{ - __u64 id; - - spin_lock(&srpc_data.rpc_glock); - id = srpc_data.rpc_matchbits++; - spin_unlock(&srpc_data.rpc_glock); - return id; -} - -static void -srpc_init_server_rpc(struct srpc_server_rpc *rpc, - struct srpc_service_cd *scd, - struct srpc_buffer *buffer) -{ - memset(rpc, 0, sizeof(*rpc)); - swi_init_workitem(&rpc->srpc_wi, srpc_handle_rpc, - srpc_serv_is_framework(scd->scd_svc) ? - lst_serial_wq : lst_test_wq[scd->scd_cpt]); - - rpc->srpc_ev.ev_fired = 1; /* no event expected now */ - - rpc->srpc_scd = scd; - rpc->srpc_reqstbuf = buffer; - rpc->srpc_peer = buffer->buf_peer; - rpc->srpc_self = buffer->buf_self; - LNetInvalidateMDHandle(&rpc->srpc_replymdh); -} - -static void -srpc_service_fini(struct srpc_service *svc) -{ - struct srpc_service_cd *scd; - struct srpc_server_rpc *rpc; - struct srpc_buffer *buf; - struct list_head *q; - int i; - - if (!svc->sv_cpt_data) - return; - - cfs_percpt_for_each(scd, i, svc->sv_cpt_data) { - while (1) { - if (!list_empty(&scd->scd_buf_posted)) - q = &scd->scd_buf_posted; - else if (!list_empty(&scd->scd_buf_blocked)) - q = &scd->scd_buf_blocked; - else - break; - - while (!list_empty(q)) { - buf = list_entry(q->next, struct srpc_buffer, - buf_list); - list_del(&buf->buf_list); - kfree(buf); - } - } - - LASSERT(list_empty(&scd->scd_rpc_active)); - - while (!list_empty(&scd->scd_rpc_free)) { - rpc = list_entry(scd->scd_rpc_free.next, - struct srpc_server_rpc, - srpc_list); - list_del(&rpc->srpc_list); - kfree(rpc); - } - } - - cfs_percpt_free(svc->sv_cpt_data); - svc->sv_cpt_data = NULL; -} - -static int -srpc_service_nrpcs(struct srpc_service *svc) -{ - int nrpcs = svc->sv_wi_total / svc->sv_ncpts; - - return srpc_serv_is_framework(svc) ? - max(nrpcs, SFW_FRWK_WI_MIN) : max(nrpcs, SFW_TEST_WI_MIN); -} - -void srpc_add_buffer(struct swi_workitem *wi); - -static int -srpc_service_init(struct srpc_service *svc) -{ - struct srpc_service_cd *scd; - struct srpc_server_rpc *rpc; - int nrpcs; - int i; - int j; - - svc->sv_shuttingdown = 0; - - svc->sv_cpt_data = cfs_percpt_alloc(lnet_cpt_table(), - sizeof(**svc->sv_cpt_data)); - if (!svc->sv_cpt_data) - return -ENOMEM; - - svc->sv_ncpts = srpc_serv_is_framework(svc) ? - 1 : cfs_cpt_number(lnet_cpt_table()); - nrpcs = srpc_service_nrpcs(svc); - - cfs_percpt_for_each(scd, i, svc->sv_cpt_data) { - scd->scd_cpt = i; - scd->scd_svc = svc; - spin_lock_init(&scd->scd_lock); - INIT_LIST_HEAD(&scd->scd_rpc_free); - INIT_LIST_HEAD(&scd->scd_rpc_active); - INIT_LIST_HEAD(&scd->scd_buf_posted); - INIT_LIST_HEAD(&scd->scd_buf_blocked); - - scd->scd_ev.ev_data = scd; - scd->scd_ev.ev_type = SRPC_REQUEST_RCVD; - - /* - * NB: don't use lst_serial_wq for adding buffer, - * see details in srpc_service_add_buffers() - */ - swi_init_workitem(&scd->scd_buf_wi, - srpc_add_buffer, lst_test_wq[i]); - - if (i && srpc_serv_is_framework(svc)) { - /* - * NB: framework service only needs srpc_service_cd for - * one partition, but we allocate for all to make - * it easier to implement, it will waste a little - * memory but nobody should care about this - */ - continue; - } - - for (j = 0; j < nrpcs; j++) { - rpc = kzalloc_cpt(sizeof(*rpc), GFP_NOFS, i); - if (!rpc) { - srpc_service_fini(svc); - return -ENOMEM; - } - list_add(&rpc->srpc_list, &scd->scd_rpc_free); - } - } - - return 0; -} - -int -srpc_add_service(struct srpc_service *sv) -{ - int id = sv->sv_id; - - LASSERT(0 <= id && id <= SRPC_SERVICE_MAX_ID); - - if (srpc_service_init(sv)) - return -ENOMEM; - - spin_lock(&srpc_data.rpc_glock); - - LASSERT(srpc_data.rpc_state == SRPC_STATE_RUNNING); - - if (srpc_data.rpc_services[id]) { - spin_unlock(&srpc_data.rpc_glock); - goto failed; - } - - srpc_data.rpc_services[id] = sv; - spin_unlock(&srpc_data.rpc_glock); - - CDEBUG(D_NET, "Adding service: id %d, name %s\n", id, sv->sv_name); - return 0; - - failed: - srpc_service_fini(sv); - return -EBUSY; -} - -int -srpc_remove_service(struct srpc_service *sv) -{ - int id = sv->sv_id; - - spin_lock(&srpc_data.rpc_glock); - - if (srpc_data.rpc_services[id] != sv) { - spin_unlock(&srpc_data.rpc_glock); - return -ENOENT; - } - - srpc_data.rpc_services[id] = NULL; - spin_unlock(&srpc_data.rpc_glock); - return 0; -} - -static int -srpc_post_passive_rdma(int portal, int local, __u64 matchbits, void *buf, - int len, int options, struct lnet_process_id peer, - struct lnet_handle_md *mdh, struct srpc_event *ev) -{ - int rc; - struct lnet_md md; - struct lnet_handle_me meh; - - rc = LNetMEAttach(portal, peer, matchbits, 0, LNET_UNLINK, - local ? LNET_INS_LOCAL : LNET_INS_AFTER, &meh); - if (rc) { - CERROR("LNetMEAttach failed: %d\n", rc); - LASSERT(rc == -ENOMEM); - return -ENOMEM; - } - - md.threshold = 1; - md.user_ptr = ev; - md.start = buf; - md.length = len; - md.options = options; - md.eq_handle = srpc_data.rpc_lnet_eq; - - rc = LNetMDAttach(meh, md, LNET_UNLINK, mdh); - if (rc) { - CERROR("LNetMDAttach failed: %d\n", rc); - LASSERT(rc == -ENOMEM); - - rc = LNetMEUnlink(meh); - LASSERT(!rc); - return -ENOMEM; - } - - CDEBUG(D_NET, "Posted passive RDMA: peer %s, portal %d, matchbits %#llx\n", - libcfs_id2str(peer), portal, matchbits); - return 0; -} - -static int -srpc_post_active_rdma(int portal, __u64 matchbits, void *buf, int len, - int options, struct lnet_process_id peer, - lnet_nid_t self, struct lnet_handle_md *mdh, - struct srpc_event *ev) -{ - int rc; - struct lnet_md md; - - md.user_ptr = ev; - md.start = buf; - md.length = len; - md.eq_handle = srpc_data.rpc_lnet_eq; - md.threshold = options & LNET_MD_OP_GET ? 2 : 1; - md.options = options & ~(LNET_MD_OP_PUT | LNET_MD_OP_GET); - - rc = LNetMDBind(md, LNET_UNLINK, mdh); - if (rc) { - CERROR("LNetMDBind failed: %d\n", rc); - LASSERT(rc == -ENOMEM); - return -ENOMEM; - } - - /* - * this is kind of an abuse of the LNET_MD_OP_{PUT,GET} options. - * they're only meaningful for MDs attached to an ME (i.e. passive - * buffers... - */ - if (options & LNET_MD_OP_PUT) { - rc = LNetPut(self, *mdh, LNET_NOACK_REQ, peer, - portal, matchbits, 0, 0); - } else { - LASSERT(options & LNET_MD_OP_GET); - - rc = LNetGet(self, *mdh, peer, portal, matchbits, 0); - } - - if (rc) { - CERROR("LNet%s(%s, %d, %lld) failed: %d\n", - options & LNET_MD_OP_PUT ? "Put" : "Get", - libcfs_id2str(peer), portal, matchbits, rc); - - /* - * The forthcoming unlink event will complete this operation - * with failure, so fall through and return success here. - */ - rc = LNetMDUnlink(*mdh); - LASSERT(!rc); - } else { - CDEBUG(D_NET, "Posted active RDMA: peer %s, portal %u, matchbits %#llx\n", - libcfs_id2str(peer), portal, matchbits); - } - return 0; -} - -static int -srpc_post_passive_rqtbuf(int service, int local, void *buf, int len, - struct lnet_handle_md *mdh, struct srpc_event *ev) -{ - struct lnet_process_id any = { 0 }; - - any.nid = LNET_NID_ANY; - any.pid = LNET_PID_ANY; - - return srpc_post_passive_rdma(srpc_serv_portal(service), - local, service, buf, len, - LNET_MD_OP_PUT, any, mdh, ev); -} - -static int -srpc_service_post_buffer(struct srpc_service_cd *scd, struct srpc_buffer *buf) -__must_hold(&scd->scd_lock) -{ - struct srpc_service *sv = scd->scd_svc; - struct srpc_msg *msg = &buf->buf_msg; - int rc; - - LNetInvalidateMDHandle(&buf->buf_mdh); - list_add(&buf->buf_list, &scd->scd_buf_posted); - scd->scd_buf_nposted++; - spin_unlock(&scd->scd_lock); - - rc = srpc_post_passive_rqtbuf(sv->sv_id, - !srpc_serv_is_framework(sv), - msg, sizeof(*msg), &buf->buf_mdh, - &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 - * buf to scd_buf_posted _before_ dropping scd_lock - */ - spin_lock(&scd->scd_lock); - - if (!rc) { - if (!sv->sv_shuttingdown) - return 0; - - 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); - - kfree(buf); - - spin_lock(&scd->scd_lock); - return rc; -} - -void -srpc_add_buffer(struct swi_workitem *wi) -{ - struct srpc_service_cd *scd = container_of(wi, struct srpc_service_cd, scd_buf_wi); - 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); - - buf = kzalloc(sizeof(*buf), GFP_NOFS); - 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); - kfree(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); -} - -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_serial_wq, 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_test_wq), - * so we don't have any risk of deadlock, though this could - * block all WIs pending on lst_serial_wq 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) { - swi_cancel_workitem(&scd->scd_buf_wi); - - spin_lock(&scd->scd_lock); - - 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, 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_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); - kfree(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); - - 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 */ -void -srpc_handle_rpc(struct swi_workitem *wi) -{ - struct srpc_server_rpc *rpc = container_of(wi, struct srpc_server_rpc, srpc_wi); - 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; - } - - 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; - } - - 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; - } - } - - wi->swi_state = SWI_STATE_BULK_STARTED; - - if (rpc->srpc_bulk) { - rc = srpc_do_bulk(rpc); - if (!rc) - return; /* wait for bulk */ - - LASSERT(ev->ev_fired); - ev->ev_status = rc; - } - } - /* fall through */ - 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; - } - } - - wi->swi_state = SWI_STATE_REPLY_SUBMITTED; - rc = srpc_send_reply(rpc); - if (!rc) - return; /* wait for reply */ - srpc_server_rpc_done(rpc, rc); - return; - - 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; - } -} - -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)); - - spin_unlock(&rpc->crpc_lock); - - (*rpc->crpc_done)(rpc); -} - -/* sends an outgoing RPC */ -void -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 = container_of(wi, struct srpc_client_rpc, crpc_wi); - - 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; - } - - 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 through */ - 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; - } - /* fall through */ - 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; - } - - 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; - } - } -} - -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; - - rpc = kzalloc(offsetof(struct srpc_client_rpc, - crpc_bulk.bk_iovs[nbulkiov]), GFP_KERNEL); - 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); - } - /* fall through */ - 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 */ - /* fall through */ - 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); - } - /* fall through */ - 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(HZ); - 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(); - /* fall through */ - 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 */ - /* fall through */ - case SRPC_STATE_NI_INIT: - LNetNIFini(); - } -} |