| /* |
| * 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.sun.com/software/products/lustre/docs/GPLv2.pdf |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| * 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/klnds/o2iblnd/o2iblnd_cb.c |
| * |
| * Author: Eric Barton <eric@bartonsoftware.com> |
| */ |
| |
| #include "o2iblnd.h" |
| |
| static void kiblnd_peer_alive(kib_peer_t *peer); |
| static void kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error); |
| static void kiblnd_check_sends(kib_conn_t *conn); |
| static void kiblnd_init_tx_msg(lnet_ni_t *ni, kib_tx_t *tx, |
| int type, int body_nob); |
| static int kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type, |
| int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie); |
| static void kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn); |
| static void kiblnd_queue_tx(kib_tx_t *tx, kib_conn_t *conn); |
| static void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx); |
| |
| static void |
| kiblnd_tx_done(lnet_ni_t *ni, kib_tx_t *tx) |
| { |
| lnet_msg_t *lntmsg[2]; |
| kib_net_t *net = ni->ni_data; |
| int rc; |
| int i; |
| |
| LASSERT(net); |
| LASSERT(!in_interrupt()); |
| LASSERT(!tx->tx_queued); /* mustn't be queued for sending */ |
| LASSERT(!tx->tx_sending); /* mustn't be awaiting sent callback */ |
| LASSERT(!tx->tx_waiting); /* mustn't be awaiting peer response */ |
| LASSERT(tx->tx_pool); |
| |
| kiblnd_unmap_tx(ni, tx); |
| |
| /* tx may have up to 2 lnet msgs to finalise */ |
| lntmsg[0] = tx->tx_lntmsg[0]; tx->tx_lntmsg[0] = NULL; |
| lntmsg[1] = tx->tx_lntmsg[1]; tx->tx_lntmsg[1] = NULL; |
| rc = tx->tx_status; |
| |
| if (tx->tx_conn) { |
| LASSERT(ni == tx->tx_conn->ibc_peer->ibp_ni); |
| |
| kiblnd_conn_decref(tx->tx_conn); |
| tx->tx_conn = NULL; |
| } |
| |
| tx->tx_nwrq = 0; |
| tx->tx_status = 0; |
| |
| kiblnd_pool_free_node(&tx->tx_pool->tpo_pool, &tx->tx_list); |
| |
| /* delay finalize until my descs have been freed */ |
| for (i = 0; i < 2; i++) { |
| if (!lntmsg[i]) |
| continue; |
| |
| lnet_finalize(ni, lntmsg[i], rc); |
| } |
| } |
| |
| void |
| kiblnd_txlist_done(lnet_ni_t *ni, struct list_head *txlist, int status) |
| { |
| kib_tx_t *tx; |
| |
| while (!list_empty(txlist)) { |
| tx = list_entry(txlist->next, kib_tx_t, tx_list); |
| |
| list_del(&tx->tx_list); |
| /* complete now */ |
| tx->tx_waiting = 0; |
| tx->tx_status = status; |
| kiblnd_tx_done(ni, tx); |
| } |
| } |
| |
| static kib_tx_t * |
| kiblnd_get_idle_tx(lnet_ni_t *ni, lnet_nid_t target) |
| { |
| kib_net_t *net = (kib_net_t *)ni->ni_data; |
| struct list_head *node; |
| kib_tx_t *tx; |
| kib_tx_poolset_t *tps; |
| |
| tps = net->ibn_tx_ps[lnet_cpt_of_nid(target)]; |
| node = kiblnd_pool_alloc_node(&tps->tps_poolset); |
| if (!node) |
| return NULL; |
| tx = list_entry(node, kib_tx_t, tx_list); |
| |
| LASSERT(!tx->tx_nwrq); |
| LASSERT(!tx->tx_queued); |
| LASSERT(!tx->tx_sending); |
| LASSERT(!tx->tx_waiting); |
| LASSERT(!tx->tx_status); |
| LASSERT(!tx->tx_conn); |
| LASSERT(!tx->tx_lntmsg[0]); |
| LASSERT(!tx->tx_lntmsg[1]); |
| LASSERT(!tx->tx_nfrags); |
| |
| return tx; |
| } |
| |
| static void |
| kiblnd_drop_rx(kib_rx_t *rx) |
| { |
| kib_conn_t *conn = rx->rx_conn; |
| struct kib_sched_info *sched = conn->ibc_sched; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&sched->ibs_lock, flags); |
| LASSERT(conn->ibc_nrx > 0); |
| conn->ibc_nrx--; |
| spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| |
| kiblnd_conn_decref(conn); |
| } |
| |
| int |
| kiblnd_post_rx(kib_rx_t *rx, int credit) |
| { |
| kib_conn_t *conn = rx->rx_conn; |
| kib_net_t *net = conn->ibc_peer->ibp_ni->ni_data; |
| struct ib_recv_wr *bad_wrq = NULL; |
| struct ib_mr *mr = conn->ibc_hdev->ibh_mrs; |
| int rc; |
| |
| LASSERT(net); |
| LASSERT(!in_interrupt()); |
| LASSERT(credit == IBLND_POSTRX_NO_CREDIT || |
| credit == IBLND_POSTRX_PEER_CREDIT || |
| credit == IBLND_POSTRX_RSRVD_CREDIT); |
| LASSERT(mr); |
| |
| rx->rx_sge.lkey = mr->lkey; |
| rx->rx_sge.addr = rx->rx_msgaddr; |
| rx->rx_sge.length = IBLND_MSG_SIZE; |
| |
| rx->rx_wrq.next = NULL; |
| rx->rx_wrq.sg_list = &rx->rx_sge; |
| rx->rx_wrq.num_sge = 1; |
| rx->rx_wrq.wr_id = kiblnd_ptr2wreqid(rx, IBLND_WID_RX); |
| |
| LASSERT(conn->ibc_state >= IBLND_CONN_INIT); |
| LASSERT(rx->rx_nob >= 0); /* not posted */ |
| |
| if (conn->ibc_state > IBLND_CONN_ESTABLISHED) { |
| kiblnd_drop_rx(rx); /* No more posts for this rx */ |
| return 0; |
| } |
| |
| rx->rx_nob = -1; /* flag posted */ |
| |
| /* NB: need an extra reference after ib_post_recv because we don't |
| * own this rx (and rx::rx_conn) anymore, LU-5678. |
| */ |
| kiblnd_conn_addref(conn); |
| rc = ib_post_recv(conn->ibc_cmid->qp, &rx->rx_wrq, &bad_wrq); |
| if (unlikely(rc)) { |
| CERROR("Can't post rx for %s: %d, bad_wrq: %p\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), rc, bad_wrq); |
| rx->rx_nob = 0; |
| } |
| |
| if (conn->ibc_state < IBLND_CONN_ESTABLISHED) /* Initial post */ |
| goto out; |
| |
| if (unlikely(rc)) { |
| kiblnd_close_conn(conn, rc); |
| kiblnd_drop_rx(rx); /* No more posts for this rx */ |
| goto out; |
| } |
| |
| if (credit == IBLND_POSTRX_NO_CREDIT) |
| goto out; |
| |
| spin_lock(&conn->ibc_lock); |
| if (credit == IBLND_POSTRX_PEER_CREDIT) |
| conn->ibc_outstanding_credits++; |
| else |
| conn->ibc_reserved_credits++; |
| spin_unlock(&conn->ibc_lock); |
| |
| kiblnd_check_sends(conn); |
| out: |
| kiblnd_conn_decref(conn); |
| return rc; |
| } |
| |
| static kib_tx_t * |
| kiblnd_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie) |
| { |
| struct list_head *tmp; |
| |
| list_for_each(tmp, &conn->ibc_active_txs) { |
| kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list); |
| |
| LASSERT(!tx->tx_queued); |
| LASSERT(tx->tx_sending || tx->tx_waiting); |
| |
| if (tx->tx_cookie != cookie) |
| continue; |
| |
| if (tx->tx_waiting && |
| tx->tx_msg->ibm_type == txtype) |
| return tx; |
| |
| CWARN("Bad completion: %swaiting, type %x (wanted %x)\n", |
| tx->tx_waiting ? "" : "NOT ", |
| tx->tx_msg->ibm_type, txtype); |
| } |
| return NULL; |
| } |
| |
| static void |
| kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie) |
| { |
| kib_tx_t *tx; |
| lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| int idle; |
| |
| spin_lock(&conn->ibc_lock); |
| |
| tx = kiblnd_find_waiting_tx_locked(conn, txtype, cookie); |
| if (!tx) { |
| spin_unlock(&conn->ibc_lock); |
| |
| CWARN("Unmatched completion type %x cookie %#llx from %s\n", |
| txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| kiblnd_close_conn(conn, -EPROTO); |
| return; |
| } |
| |
| if (!tx->tx_status) { /* success so far */ |
| if (status < 0) /* failed? */ |
| tx->tx_status = status; |
| else if (txtype == IBLND_MSG_GET_REQ) |
| lnet_set_reply_msg_len(ni, tx->tx_lntmsg[1], status); |
| } |
| |
| tx->tx_waiting = 0; |
| |
| idle = !tx->tx_queued && !tx->tx_sending; |
| if (idle) |
| list_del(&tx->tx_list); |
| |
| spin_unlock(&conn->ibc_lock); |
| |
| if (idle) |
| kiblnd_tx_done(ni, tx); |
| } |
| |
| static void |
| kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie) |
| { |
| lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| kib_tx_t *tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); |
| |
| if (!tx) { |
| CERROR("Can't get tx for completion %x for %s\n", |
| type, libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| return; |
| } |
| |
| tx->tx_msg->ibm_u.completion.ibcm_status = status; |
| tx->tx_msg->ibm_u.completion.ibcm_cookie = cookie; |
| kiblnd_init_tx_msg(ni, tx, type, sizeof(kib_completion_msg_t)); |
| |
| kiblnd_queue_tx(tx, conn); |
| } |
| |
| static void |
| kiblnd_handle_rx(kib_rx_t *rx) |
| { |
| kib_msg_t *msg = rx->rx_msg; |
| kib_conn_t *conn = rx->rx_conn; |
| lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| int credits = msg->ibm_credits; |
| kib_tx_t *tx; |
| int rc = 0; |
| int rc2; |
| int post_credit; |
| |
| LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED); |
| |
| CDEBUG(D_NET, "Received %x[%d] from %s\n", |
| msg->ibm_type, credits, |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| |
| if (credits) { |
| /* Have I received credits that will let me send? */ |
| spin_lock(&conn->ibc_lock); |
| |
| if (conn->ibc_credits + credits > |
| conn->ibc_queue_depth) { |
| rc2 = conn->ibc_credits; |
| spin_unlock(&conn->ibc_lock); |
| |
| CERROR("Bad credits from %s: %d + %d > %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| rc2, credits, conn->ibc_queue_depth); |
| |
| kiblnd_close_conn(conn, -EPROTO); |
| kiblnd_post_rx(rx, IBLND_POSTRX_NO_CREDIT); |
| return; |
| } |
| |
| conn->ibc_credits += credits; |
| |
| /* This ensures the credit taken by NOOP can be returned */ |
| if (msg->ibm_type == IBLND_MSG_NOOP && |
| !IBLND_OOB_CAPABLE(conn->ibc_version)) /* v1 only */ |
| conn->ibc_outstanding_credits++; |
| |
| spin_unlock(&conn->ibc_lock); |
| kiblnd_check_sends(conn); |
| } |
| |
| switch (msg->ibm_type) { |
| default: |
| CERROR("Bad IBLND message type %x from %s\n", |
| msg->ibm_type, libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| post_credit = IBLND_POSTRX_NO_CREDIT; |
| rc = -EPROTO; |
| break; |
| |
| case IBLND_MSG_NOOP: |
| if (IBLND_OOB_CAPABLE(conn->ibc_version)) { |
| post_credit = IBLND_POSTRX_NO_CREDIT; |
| break; |
| } |
| |
| if (credits) /* credit already posted */ |
| post_credit = IBLND_POSTRX_NO_CREDIT; |
| else /* a keepalive NOOP */ |
| post_credit = IBLND_POSTRX_PEER_CREDIT; |
| break; |
| |
| case IBLND_MSG_IMMEDIATE: |
| post_credit = IBLND_POSTRX_DONT_POST; |
| rc = lnet_parse(ni, &msg->ibm_u.immediate.ibim_hdr, |
| msg->ibm_srcnid, rx, 0); |
| if (rc < 0) /* repost on error */ |
| post_credit = IBLND_POSTRX_PEER_CREDIT; |
| break; |
| |
| case IBLND_MSG_PUT_REQ: |
| post_credit = IBLND_POSTRX_DONT_POST; |
| rc = lnet_parse(ni, &msg->ibm_u.putreq.ibprm_hdr, |
| msg->ibm_srcnid, rx, 1); |
| if (rc < 0) /* repost on error */ |
| post_credit = IBLND_POSTRX_PEER_CREDIT; |
| break; |
| |
| case IBLND_MSG_PUT_NAK: |
| CWARN("PUT_NACK from %s\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| post_credit = IBLND_POSTRX_RSRVD_CREDIT; |
| kiblnd_handle_completion(conn, IBLND_MSG_PUT_REQ, |
| msg->ibm_u.completion.ibcm_status, |
| msg->ibm_u.completion.ibcm_cookie); |
| break; |
| |
| case IBLND_MSG_PUT_ACK: |
| post_credit = IBLND_POSTRX_RSRVD_CREDIT; |
| |
| spin_lock(&conn->ibc_lock); |
| tx = kiblnd_find_waiting_tx_locked(conn, IBLND_MSG_PUT_REQ, |
| msg->ibm_u.putack.ibpam_src_cookie); |
| if (tx) |
| list_del(&tx->tx_list); |
| spin_unlock(&conn->ibc_lock); |
| |
| if (!tx) { |
| CERROR("Unmatched PUT_ACK from %s\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| rc = -EPROTO; |
| break; |
| } |
| |
| LASSERT(tx->tx_waiting); |
| /* |
| * CAVEAT EMPTOR: I could be racing with tx_complete, but... |
| * (a) I can overwrite tx_msg since my peer has received it! |
| * (b) tx_waiting set tells tx_complete() it's not done. |
| */ |
| tx->tx_nwrq = 0; /* overwrite PUT_REQ */ |
| |
| rc2 = kiblnd_init_rdma(conn, tx, IBLND_MSG_PUT_DONE, |
| kiblnd_rd_size(&msg->ibm_u.putack.ibpam_rd), |
| &msg->ibm_u.putack.ibpam_rd, |
| msg->ibm_u.putack.ibpam_dst_cookie); |
| if (rc2 < 0) |
| CERROR("Can't setup rdma for PUT to %s: %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), rc2); |
| |
| spin_lock(&conn->ibc_lock); |
| tx->tx_waiting = 0; /* clear waiting and queue atomically */ |
| kiblnd_queue_tx_locked(tx, conn); |
| spin_unlock(&conn->ibc_lock); |
| break; |
| |
| case IBLND_MSG_PUT_DONE: |
| post_credit = IBLND_POSTRX_PEER_CREDIT; |
| kiblnd_handle_completion(conn, IBLND_MSG_PUT_ACK, |
| msg->ibm_u.completion.ibcm_status, |
| msg->ibm_u.completion.ibcm_cookie); |
| break; |
| |
| case IBLND_MSG_GET_REQ: |
| post_credit = IBLND_POSTRX_DONT_POST; |
| rc = lnet_parse(ni, &msg->ibm_u.get.ibgm_hdr, |
| msg->ibm_srcnid, rx, 1); |
| if (rc < 0) /* repost on error */ |
| post_credit = IBLND_POSTRX_PEER_CREDIT; |
| break; |
| |
| case IBLND_MSG_GET_DONE: |
| post_credit = IBLND_POSTRX_RSRVD_CREDIT; |
| kiblnd_handle_completion(conn, IBLND_MSG_GET_REQ, |
| msg->ibm_u.completion.ibcm_status, |
| msg->ibm_u.completion.ibcm_cookie); |
| break; |
| } |
| |
| if (rc < 0) /* protocol error */ |
| kiblnd_close_conn(conn, rc); |
| |
| if (post_credit != IBLND_POSTRX_DONT_POST) |
| kiblnd_post_rx(rx, post_credit); |
| } |
| |
| static void |
| kiblnd_rx_complete(kib_rx_t *rx, int status, int nob) |
| { |
| kib_msg_t *msg = rx->rx_msg; |
| kib_conn_t *conn = rx->rx_conn; |
| lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| kib_net_t *net = ni->ni_data; |
| int rc; |
| int err = -EIO; |
| |
| LASSERT(net); |
| LASSERT(rx->rx_nob < 0); /* was posted */ |
| rx->rx_nob = 0; /* isn't now */ |
| |
| if (conn->ibc_state > IBLND_CONN_ESTABLISHED) |
| goto ignore; |
| |
| if (status != IB_WC_SUCCESS) { |
| CNETERR("Rx from %s failed: %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), status); |
| goto failed; |
| } |
| |
| LASSERT(nob >= 0); |
| rx->rx_nob = nob; |
| |
| rc = kiblnd_unpack_msg(msg, rx->rx_nob); |
| if (rc) { |
| CERROR("Error %d unpacking rx from %s\n", |
| rc, libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| goto failed; |
| } |
| |
| if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid || |
| msg->ibm_dstnid != ni->ni_nid || |
| msg->ibm_srcstamp != conn->ibc_incarnation || |
| msg->ibm_dststamp != net->ibn_incarnation) { |
| CERROR("Stale rx from %s\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| err = -ESTALE; |
| goto failed; |
| } |
| |
| /* set time last known alive */ |
| kiblnd_peer_alive(conn->ibc_peer); |
| |
| /* racing with connection establishment/teardown! */ |
| |
| if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { |
| rwlock_t *g_lock = &kiblnd_data.kib_global_lock; |
| unsigned long flags; |
| |
| write_lock_irqsave(g_lock, flags); |
| /* must check holding global lock to eliminate race */ |
| if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { |
| list_add_tail(&rx->rx_list, &conn->ibc_early_rxs); |
| write_unlock_irqrestore(g_lock, flags); |
| return; |
| } |
| write_unlock_irqrestore(g_lock, flags); |
| } |
| kiblnd_handle_rx(rx); |
| return; |
| |
| failed: |
| CDEBUG(D_NET, "rx %p conn %p\n", rx, conn); |
| kiblnd_close_conn(conn, err); |
| ignore: |
| kiblnd_drop_rx(rx); /* Don't re-post rx. */ |
| } |
| |
| static struct page * |
| kiblnd_kvaddr_to_page(unsigned long vaddr) |
| { |
| struct page *page; |
| |
| if (is_vmalloc_addr((void *)vaddr)) { |
| page = vmalloc_to_page((void *)vaddr); |
| LASSERT(page); |
| return page; |
| } |
| #ifdef CONFIG_HIGHMEM |
| if (vaddr >= PKMAP_BASE && |
| vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) { |
| /* No highmem pages only used for bulk (kiov) I/O */ |
| CERROR("find page for address in highmem\n"); |
| LBUG(); |
| } |
| #endif |
| page = virt_to_page(vaddr); |
| LASSERT(page); |
| return page; |
| } |
| |
| static int |
| kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob) |
| { |
| kib_hca_dev_t *hdev; |
| __u64 *pages = tx->tx_pages; |
| kib_fmr_poolset_t *fps; |
| int npages; |
| int size; |
| int cpt; |
| int rc; |
| int i; |
| |
| LASSERT(tx->tx_pool); |
| LASSERT(tx->tx_pool->tpo_pool.po_owner); |
| |
| hdev = tx->tx_pool->tpo_hdev; |
| |
| for (i = 0, npages = 0; i < rd->rd_nfrags; i++) { |
| for (size = 0; size < rd->rd_frags[i].rf_nob; |
| size += hdev->ibh_page_size) { |
| pages[npages++] = (rd->rd_frags[i].rf_addr & |
| hdev->ibh_page_mask) + size; |
| } |
| } |
| |
| cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt; |
| |
| fps = net->ibn_fmr_ps[cpt]; |
| rc = kiblnd_fmr_pool_map(fps, pages, npages, 0, &tx->fmr); |
| if (rc) { |
| CERROR("Can't map %d pages: %d\n", npages, rc); |
| return rc; |
| } |
| |
| /* |
| * If rd is not tx_rd, it's going to get sent to a peer, who will need |
| * the rkey |
| */ |
| rd->rd_key = (rd != tx->tx_rd) ? tx->fmr.fmr_pfmr->fmr->rkey : |
| tx->fmr.fmr_pfmr->fmr->lkey; |
| rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask; |
| rd->rd_frags[0].rf_nob = nob; |
| rd->rd_nfrags = 1; |
| |
| return 0; |
| } |
| |
| static void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx) |
| { |
| kib_net_t *net = ni->ni_data; |
| |
| LASSERT(net); |
| |
| if (net->ibn_fmr_ps && tx->fmr.fmr_pfmr) { |
| kiblnd_fmr_pool_unmap(&tx->fmr, tx->tx_status); |
| tx->fmr.fmr_pfmr = NULL; |
| } |
| |
| if (tx->tx_nfrags) { |
| kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev, |
| tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir); |
| tx->tx_nfrags = 0; |
| } |
| } |
| |
| static int kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, |
| int nfrags) |
| { |
| kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev; |
| kib_net_t *net = ni->ni_data; |
| struct ib_mr *mr = NULL; |
| __u32 nob; |
| int i; |
| |
| /* |
| * If rd is not tx_rd, it's going to get sent to a peer and I'm the |
| * RDMA sink |
| */ |
| tx->tx_dmadir = (rd != tx->tx_rd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
| tx->tx_nfrags = nfrags; |
| |
| rd->rd_nfrags = kiblnd_dma_map_sg(hdev->ibh_ibdev, tx->tx_frags, |
| tx->tx_nfrags, tx->tx_dmadir); |
| |
| for (i = 0, nob = 0; i < rd->rd_nfrags; i++) { |
| rd->rd_frags[i].rf_nob = kiblnd_sg_dma_len( |
| hdev->ibh_ibdev, &tx->tx_frags[i]); |
| rd->rd_frags[i].rf_addr = kiblnd_sg_dma_address( |
| hdev->ibh_ibdev, &tx->tx_frags[i]); |
| nob += rd->rd_frags[i].rf_nob; |
| } |
| |
| mr = kiblnd_find_rd_dma_mr(hdev, rd, tx->tx_conn ? |
| tx->tx_conn->ibc_max_frags : -1); |
| if (mr) { |
| /* found pre-mapping MR */ |
| rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey; |
| return 0; |
| } |
| |
| if (net->ibn_fmr_ps) |
| return kiblnd_fmr_map_tx(net, tx, rd, nob); |
| |
| return -EINVAL; |
| } |
| |
| static int |
| kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, |
| unsigned int niov, struct kvec *iov, int offset, int nob) |
| { |
| kib_net_t *net = ni->ni_data; |
| struct page *page; |
| struct scatterlist *sg; |
| unsigned long vaddr; |
| int fragnob; |
| int page_offset; |
| |
| LASSERT(nob > 0); |
| LASSERT(niov > 0); |
| LASSERT(net); |
| |
| while (offset >= iov->iov_len) { |
| offset -= iov->iov_len; |
| niov--; |
| iov++; |
| LASSERT(niov > 0); |
| } |
| |
| sg = tx->tx_frags; |
| do { |
| LASSERT(niov > 0); |
| |
| vaddr = ((unsigned long)iov->iov_base) + offset; |
| page_offset = vaddr & (PAGE_SIZE - 1); |
| page = kiblnd_kvaddr_to_page(vaddr); |
| if (!page) { |
| CERROR("Can't find page\n"); |
| return -EFAULT; |
| } |
| |
| fragnob = min((int)(iov->iov_len - offset), nob); |
| fragnob = min(fragnob, (int)PAGE_SIZE - page_offset); |
| |
| sg_set_page(sg, page, fragnob, page_offset); |
| sg++; |
| |
| if (offset + fragnob < iov->iov_len) { |
| offset += fragnob; |
| } else { |
| offset = 0; |
| iov++; |
| niov--; |
| } |
| nob -= fragnob; |
| } while (nob > 0); |
| |
| return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags); |
| } |
| |
| static int |
| kiblnd_setup_rd_kiov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, |
| int nkiov, lnet_kiov_t *kiov, int offset, int nob) |
| { |
| kib_net_t *net = ni->ni_data; |
| struct scatterlist *sg; |
| int fragnob; |
| |
| CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob); |
| |
| LASSERT(nob > 0); |
| LASSERT(nkiov > 0); |
| LASSERT(net); |
| |
| while (offset >= kiov->kiov_len) { |
| offset -= kiov->kiov_len; |
| nkiov--; |
| kiov++; |
| LASSERT(nkiov > 0); |
| } |
| |
| sg = tx->tx_frags; |
| do { |
| LASSERT(nkiov > 0); |
| |
| fragnob = min((int)(kiov->kiov_len - offset), nob); |
| |
| sg_set_page(sg, kiov->kiov_page, fragnob, |
| kiov->kiov_offset + offset); |
| sg++; |
| |
| offset = 0; |
| kiov++; |
| nkiov--; |
| nob -= fragnob; |
| } while (nob > 0); |
| |
| return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags); |
| } |
| |
| static int |
| kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) |
| __must_hold(&conn->ibc_lock) |
| { |
| kib_msg_t *msg = tx->tx_msg; |
| kib_peer_t *peer = conn->ibc_peer; |
| int ver = conn->ibc_version; |
| int rc; |
| int done; |
| |
| LASSERT(tx->tx_queued); |
| /* We rely on this for QP sizing */ |
| LASSERT(tx->tx_nwrq > 0); |
| LASSERT(tx->tx_nwrq <= 1 + conn->ibc_max_frags); |
| |
| LASSERT(!credit || credit == 1); |
| LASSERT(conn->ibc_outstanding_credits >= 0); |
| LASSERT(conn->ibc_outstanding_credits <= conn->ibc_queue_depth); |
| LASSERT(conn->ibc_credits >= 0); |
| LASSERT(conn->ibc_credits <= conn->ibc_queue_depth); |
| |
| if (conn->ibc_nsends_posted == IBLND_CONCURRENT_SENDS(ver)) { |
| /* tx completions outstanding... */ |
| CDEBUG(D_NET, "%s: posted enough\n", |
| libcfs_nid2str(peer->ibp_nid)); |
| return -EAGAIN; |
| } |
| |
| if (credit && !conn->ibc_credits) { /* no credits */ |
| CDEBUG(D_NET, "%s: no credits\n", |
| libcfs_nid2str(peer->ibp_nid)); |
| return -EAGAIN; |
| } |
| |
| if (credit && !IBLND_OOB_CAPABLE(ver) && |
| conn->ibc_credits == 1 && /* last credit reserved */ |
| msg->ibm_type != IBLND_MSG_NOOP) { /* for NOOP */ |
| CDEBUG(D_NET, "%s: not using last credit\n", |
| libcfs_nid2str(peer->ibp_nid)); |
| return -EAGAIN; |
| } |
| |
| /* NB don't drop ibc_lock before bumping tx_sending */ |
| list_del(&tx->tx_list); |
| tx->tx_queued = 0; |
| |
| if (msg->ibm_type == IBLND_MSG_NOOP && |
| (!kiblnd_need_noop(conn) || /* redundant NOOP */ |
| (IBLND_OOB_CAPABLE(ver) && /* posted enough NOOP */ |
| conn->ibc_noops_posted == IBLND_OOB_MSGS(ver)))) { |
| /* |
| * OK to drop when posted enough NOOPs, since |
| * kiblnd_check_sends will queue NOOP again when |
| * posted NOOPs complete |
| */ |
| spin_unlock(&conn->ibc_lock); |
| kiblnd_tx_done(peer->ibp_ni, tx); |
| spin_lock(&conn->ibc_lock); |
| CDEBUG(D_NET, "%s(%d): redundant or enough NOOP\n", |
| libcfs_nid2str(peer->ibp_nid), |
| conn->ibc_noops_posted); |
| return 0; |
| } |
| |
| kiblnd_pack_msg(peer->ibp_ni, msg, ver, conn->ibc_outstanding_credits, |
| peer->ibp_nid, conn->ibc_incarnation); |
| |
| conn->ibc_credits -= credit; |
| conn->ibc_outstanding_credits = 0; |
| conn->ibc_nsends_posted++; |
| if (msg->ibm_type == IBLND_MSG_NOOP) |
| conn->ibc_noops_posted++; |
| |
| /* |
| * CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA |
| * PUT. If so, it was first queued here as a PUT_REQ, sent and |
| * stashed on ibc_active_txs, matched by an incoming PUT_ACK, |
| * and then re-queued here. It's (just) possible that |
| * tx_sending is non-zero if we've not done the tx_complete() |
| * from the first send; hence the ++ rather than = below. |
| */ |
| tx->tx_sending++; |
| list_add(&tx->tx_list, &conn->ibc_active_txs); |
| |
| /* I'm still holding ibc_lock! */ |
| if (conn->ibc_state != IBLND_CONN_ESTABLISHED) { |
| rc = -ECONNABORTED; |
| } else if (tx->tx_pool->tpo_pool.po_failed || |
| conn->ibc_hdev != tx->tx_pool->tpo_hdev) { |
| /* close_conn will launch failover */ |
| rc = -ENETDOWN; |
| } else { |
| struct ib_send_wr *wrq = &tx->tx_wrq[tx->tx_nwrq - 1].wr; |
| |
| LASSERTF(wrq->wr_id == kiblnd_ptr2wreqid(tx, IBLND_WID_TX), |
| "bad wr_id %llx, opc %d, flags %d, peer: %s\n", |
| wrq->wr_id, wrq->opcode, wrq->send_flags, |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| wrq = NULL; |
| rc = ib_post_send(conn->ibc_cmid->qp, &tx->tx_wrq->wr, &wrq); |
| } |
| |
| conn->ibc_last_send = jiffies; |
| |
| if (!rc) |
| return 0; |
| |
| /* |
| * NB credits are transferred in the actual |
| * message, which can only be the last work item |
| */ |
| conn->ibc_credits += credit; |
| conn->ibc_outstanding_credits += msg->ibm_credits; |
| conn->ibc_nsends_posted--; |
| if (msg->ibm_type == IBLND_MSG_NOOP) |
| conn->ibc_noops_posted--; |
| |
| tx->tx_status = rc; |
| tx->tx_waiting = 0; |
| tx->tx_sending--; |
| |
| done = !tx->tx_sending; |
| if (done) |
| list_del(&tx->tx_list); |
| |
| spin_unlock(&conn->ibc_lock); |
| |
| if (conn->ibc_state == IBLND_CONN_ESTABLISHED) |
| CERROR("Error %d posting transmit to %s\n", |
| rc, libcfs_nid2str(peer->ibp_nid)); |
| else |
| CDEBUG(D_NET, "Error %d posting transmit to %s\n", |
| rc, libcfs_nid2str(peer->ibp_nid)); |
| |
| kiblnd_close_conn(conn, rc); |
| |
| if (done) |
| kiblnd_tx_done(peer->ibp_ni, tx); |
| |
| spin_lock(&conn->ibc_lock); |
| |
| return -EIO; |
| } |
| |
| static void |
| kiblnd_check_sends(kib_conn_t *conn) |
| { |
| int ver = conn->ibc_version; |
| lnet_ni_t *ni = conn->ibc_peer->ibp_ni; |
| kib_tx_t *tx; |
| |
| /* Don't send anything until after the connection is established */ |
| if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { |
| CDEBUG(D_NET, "%s too soon\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| return; |
| } |
| |
| spin_lock(&conn->ibc_lock); |
| |
| LASSERT(conn->ibc_nsends_posted <= IBLND_CONCURRENT_SENDS(ver)); |
| LASSERT(!IBLND_OOB_CAPABLE(ver) || |
| conn->ibc_noops_posted <= IBLND_OOB_MSGS(ver)); |
| LASSERT(conn->ibc_reserved_credits >= 0); |
| |
| while (conn->ibc_reserved_credits > 0 && |
| !list_empty(&conn->ibc_tx_queue_rsrvd)) { |
| tx = list_entry(conn->ibc_tx_queue_rsrvd.next, |
| kib_tx_t, tx_list); |
| list_del(&tx->tx_list); |
| list_add_tail(&tx->tx_list, &conn->ibc_tx_queue); |
| conn->ibc_reserved_credits--; |
| } |
| |
| if (kiblnd_need_noop(conn)) { |
| spin_unlock(&conn->ibc_lock); |
| |
| tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); |
| if (tx) |
| kiblnd_init_tx_msg(ni, tx, IBLND_MSG_NOOP, 0); |
| |
| spin_lock(&conn->ibc_lock); |
| if (tx) |
| kiblnd_queue_tx_locked(tx, conn); |
| } |
| |
| for (;;) { |
| int credit; |
| |
| if (!list_empty(&conn->ibc_tx_queue_nocred)) { |
| credit = 0; |
| tx = list_entry(conn->ibc_tx_queue_nocred.next, |
| kib_tx_t, tx_list); |
| } else if (!list_empty(&conn->ibc_tx_noops)) { |
| LASSERT(!IBLND_OOB_CAPABLE(ver)); |
| credit = 1; |
| tx = list_entry(conn->ibc_tx_noops.next, |
| kib_tx_t, tx_list); |
| } else if (!list_empty(&conn->ibc_tx_queue)) { |
| credit = 1; |
| tx = list_entry(conn->ibc_tx_queue.next, |
| kib_tx_t, tx_list); |
| } else { |
| break; |
| } |
| |
| if (kiblnd_post_tx_locked(conn, tx, credit)) |
| break; |
| } |
| |
| spin_unlock(&conn->ibc_lock); |
| } |
| |
| static void |
| kiblnd_tx_complete(kib_tx_t *tx, int status) |
| { |
| int failed = (status != IB_WC_SUCCESS); |
| kib_conn_t *conn = tx->tx_conn; |
| int idle; |
| |
| LASSERT(tx->tx_sending > 0); |
| |
| if (failed) { |
| if (conn->ibc_state == IBLND_CONN_ESTABLISHED) |
| CNETERR("Tx -> %s cookie %#llx sending %d waiting %d: failed %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| tx->tx_cookie, tx->tx_sending, tx->tx_waiting, |
| status); |
| |
| kiblnd_close_conn(conn, -EIO); |
| } else { |
| kiblnd_peer_alive(conn->ibc_peer); |
| } |
| |
| spin_lock(&conn->ibc_lock); |
| |
| /* |
| * I could be racing with rdma completion. Whoever makes 'tx' idle |
| * gets to free it, which also drops its ref on 'conn'. |
| */ |
| tx->tx_sending--; |
| conn->ibc_nsends_posted--; |
| if (tx->tx_msg->ibm_type == IBLND_MSG_NOOP) |
| conn->ibc_noops_posted--; |
| |
| if (failed) { |
| tx->tx_waiting = 0; /* don't wait for peer */ |
| tx->tx_status = -EIO; |
| } |
| |
| idle = !tx->tx_sending && /* This is the final callback */ |
| !tx->tx_waiting && /* Not waiting for peer */ |
| !tx->tx_queued; /* Not re-queued (PUT_DONE) */ |
| if (idle) |
| list_del(&tx->tx_list); |
| |
| kiblnd_conn_addref(conn); /* 1 ref for me.... */ |
| |
| spin_unlock(&conn->ibc_lock); |
| |
| if (idle) |
| kiblnd_tx_done(conn->ibc_peer->ibp_ni, tx); |
| |
| kiblnd_check_sends(conn); |
| |
| kiblnd_conn_decref(conn); /* ...until here */ |
| } |
| |
| static void |
| kiblnd_init_tx_msg(lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob) |
| { |
| kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev; |
| struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq]; |
| struct ib_rdma_wr *wrq = &tx->tx_wrq[tx->tx_nwrq]; |
| int nob = offsetof(kib_msg_t, ibm_u) + body_nob; |
| struct ib_mr *mr = hdev->ibh_mrs; |
| |
| LASSERT(tx->tx_nwrq >= 0); |
| LASSERT(tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1); |
| LASSERT(nob <= IBLND_MSG_SIZE); |
| LASSERT(mr); |
| |
| kiblnd_init_msg(tx->tx_msg, type, body_nob); |
| |
| sge->lkey = mr->lkey; |
| sge->addr = tx->tx_msgaddr; |
| sge->length = nob; |
| |
| memset(wrq, 0, sizeof(*wrq)); |
| |
| wrq->wr.next = NULL; |
| wrq->wr.wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX); |
| wrq->wr.sg_list = sge; |
| wrq->wr.num_sge = 1; |
| wrq->wr.opcode = IB_WR_SEND; |
| wrq->wr.send_flags = IB_SEND_SIGNALED; |
| |
| tx->tx_nwrq++; |
| } |
| |
| static int |
| kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type, |
| int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie) |
| { |
| kib_msg_t *ibmsg = tx->tx_msg; |
| kib_rdma_desc_t *srcrd = tx->tx_rd; |
| struct ib_sge *sge = &tx->tx_sge[0]; |
| struct ib_rdma_wr *wrq = &tx->tx_wrq[0], *next; |
| int rc = resid; |
| int srcidx = 0; |
| int dstidx = 0; |
| int wrknob; |
| |
| LASSERT(!in_interrupt()); |
| LASSERT(!tx->tx_nwrq); |
| LASSERT(type == IBLND_MSG_GET_DONE || |
| type == IBLND_MSG_PUT_DONE); |
| |
| while (resid > 0) { |
| if (srcidx >= srcrd->rd_nfrags) { |
| CERROR("Src buffer exhausted: %d frags\n", srcidx); |
| rc = -EPROTO; |
| break; |
| } |
| |
| if (dstidx == dstrd->rd_nfrags) { |
| CERROR("Dst buffer exhausted: %d frags\n", dstidx); |
| rc = -EPROTO; |
| break; |
| } |
| |
| if (tx->tx_nwrq >= conn->ibc_max_frags) { |
| CERROR("RDMA has too many fragments for peer %s (%d), src idx/frags: %d/%d dst idx/frags: %d/%d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| conn->ibc_max_frags, |
| srcidx, srcrd->rd_nfrags, |
| dstidx, dstrd->rd_nfrags); |
| rc = -EMSGSIZE; |
| break; |
| } |
| |
| wrknob = min(min(kiblnd_rd_frag_size(srcrd, srcidx), |
| kiblnd_rd_frag_size(dstrd, dstidx)), |
| (__u32) resid); |
| |
| sge = &tx->tx_sge[tx->tx_nwrq]; |
| sge->addr = kiblnd_rd_frag_addr(srcrd, srcidx); |
| sge->lkey = kiblnd_rd_frag_key(srcrd, srcidx); |
| sge->length = wrknob; |
| |
| wrq = &tx->tx_wrq[tx->tx_nwrq]; |
| next = wrq + 1; |
| |
| wrq->wr.next = &next->wr; |
| wrq->wr.wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA); |
| wrq->wr.sg_list = sge; |
| wrq->wr.num_sge = 1; |
| wrq->wr.opcode = IB_WR_RDMA_WRITE; |
| wrq->wr.send_flags = 0; |
| |
| wrq->remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx); |
| wrq->rkey = kiblnd_rd_frag_key(dstrd, dstidx); |
| |
| srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, wrknob); |
| dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, wrknob); |
| |
| resid -= wrknob; |
| |
| tx->tx_nwrq++; |
| wrq++; |
| sge++; |
| } |
| |
| if (rc < 0) /* no RDMA if completing with failure */ |
| tx->tx_nwrq = 0; |
| |
| ibmsg->ibm_u.completion.ibcm_status = rc; |
| ibmsg->ibm_u.completion.ibcm_cookie = dstcookie; |
| kiblnd_init_tx_msg(conn->ibc_peer->ibp_ni, tx, |
| type, sizeof(kib_completion_msg_t)); |
| |
| return rc; |
| } |
| |
| static void |
| kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn) |
| { |
| struct list_head *q; |
| |
| LASSERT(tx->tx_nwrq > 0); /* work items set up */ |
| LASSERT(!tx->tx_queued); /* not queued for sending already */ |
| LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED); |
| |
| tx->tx_queued = 1; |
| tx->tx_deadline = jiffies + |
| msecs_to_jiffies(*kiblnd_tunables.kib_timeout * |
| MSEC_PER_SEC); |
| |
| if (!tx->tx_conn) { |
| kiblnd_conn_addref(conn); |
| tx->tx_conn = conn; |
| LASSERT(tx->tx_msg->ibm_type != IBLND_MSG_PUT_DONE); |
| } else { |
| /* PUT_DONE first attached to conn as a PUT_REQ */ |
| LASSERT(tx->tx_conn == conn); |
| LASSERT(tx->tx_msg->ibm_type == IBLND_MSG_PUT_DONE); |
| } |
| |
| switch (tx->tx_msg->ibm_type) { |
| default: |
| LBUG(); |
| |
| case IBLND_MSG_PUT_REQ: |
| case IBLND_MSG_GET_REQ: |
| q = &conn->ibc_tx_queue_rsrvd; |
| break; |
| |
| case IBLND_MSG_PUT_NAK: |
| case IBLND_MSG_PUT_ACK: |
| case IBLND_MSG_PUT_DONE: |
| case IBLND_MSG_GET_DONE: |
| q = &conn->ibc_tx_queue_nocred; |
| break; |
| |
| case IBLND_MSG_NOOP: |
| if (IBLND_OOB_CAPABLE(conn->ibc_version)) |
| q = &conn->ibc_tx_queue_nocred; |
| else |
| q = &conn->ibc_tx_noops; |
| break; |
| |
| case IBLND_MSG_IMMEDIATE: |
| q = &conn->ibc_tx_queue; |
| break; |
| } |
| |
| list_add_tail(&tx->tx_list, q); |
| } |
| |
| static void |
| kiblnd_queue_tx(kib_tx_t *tx, kib_conn_t *conn) |
| { |
| spin_lock(&conn->ibc_lock); |
| kiblnd_queue_tx_locked(tx, conn); |
| spin_unlock(&conn->ibc_lock); |
| |
| kiblnd_check_sends(conn); |
| } |
| |
| static int kiblnd_resolve_addr(struct rdma_cm_id *cmid, |
| struct sockaddr_in *srcaddr, |
| struct sockaddr_in *dstaddr, |
| int timeout_ms) |
| { |
| unsigned short port; |
| int rc; |
| |
| /* allow the port to be reused */ |
| rc = rdma_set_reuseaddr(cmid, 1); |
| if (rc) { |
| CERROR("Unable to set reuse on cmid: %d\n", rc); |
| return rc; |
| } |
| |
| /* look for a free privileged port */ |
| for (port = PROT_SOCK - 1; port > 0; port--) { |
| srcaddr->sin_port = htons(port); |
| rc = rdma_resolve_addr(cmid, |
| (struct sockaddr *)srcaddr, |
| (struct sockaddr *)dstaddr, |
| timeout_ms); |
| if (!rc) { |
| CDEBUG(D_NET, "bound to port %hu\n", port); |
| return 0; |
| } else if (rc == -EADDRINUSE || rc == -EADDRNOTAVAIL) { |
| CDEBUG(D_NET, "bind to port %hu failed: %d\n", |
| port, rc); |
| } else { |
| return rc; |
| } |
| } |
| |
| CERROR("Failed to bind to a free privileged port\n"); |
| return rc; |
| } |
| |
| static void |
| kiblnd_connect_peer(kib_peer_t *peer) |
| { |
| struct rdma_cm_id *cmid; |
| kib_dev_t *dev; |
| kib_net_t *net = peer->ibp_ni->ni_data; |
| struct sockaddr_in srcaddr; |
| struct sockaddr_in dstaddr; |
| int rc; |
| |
| LASSERT(net); |
| LASSERT(peer->ibp_connecting > 0); |
| |
| cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP, |
| IB_QPT_RC); |
| |
| if (IS_ERR(cmid)) { |
| CERROR("Can't create CMID for %s: %ld\n", |
| libcfs_nid2str(peer->ibp_nid), PTR_ERR(cmid)); |
| rc = PTR_ERR(cmid); |
| goto failed; |
| } |
| |
| dev = net->ibn_dev; |
| memset(&srcaddr, 0, sizeof(srcaddr)); |
| srcaddr.sin_family = AF_INET; |
| srcaddr.sin_addr.s_addr = htonl(dev->ibd_ifip); |
| |
| memset(&dstaddr, 0, sizeof(dstaddr)); |
| dstaddr.sin_family = AF_INET; |
| dstaddr.sin_port = htons(*kiblnd_tunables.kib_service); |
| dstaddr.sin_addr.s_addr = htonl(LNET_NIDADDR(peer->ibp_nid)); |
| |
| kiblnd_peer_addref(peer); /* cmid's ref */ |
| |
| if (*kiblnd_tunables.kib_use_priv_port) { |
| rc = kiblnd_resolve_addr(cmid, &srcaddr, &dstaddr, |
| *kiblnd_tunables.kib_timeout * 1000); |
| } else { |
| rc = rdma_resolve_addr(cmid, |
| (struct sockaddr *)&srcaddr, |
| (struct sockaddr *)&dstaddr, |
| *kiblnd_tunables.kib_timeout * 1000); |
| } |
| if (rc) { |
| /* Can't initiate address resolution: */ |
| CERROR("Can't resolve addr for %s: %d\n", |
| libcfs_nid2str(peer->ibp_nid), rc); |
| goto failed2; |
| } |
| |
| LASSERT(cmid->device); |
| CDEBUG(D_NET, "%s: connection bound to %s:%pI4h:%s\n", |
| libcfs_nid2str(peer->ibp_nid), dev->ibd_ifname, |
| &dev->ibd_ifip, cmid->device->name); |
| |
| return; |
| |
| failed2: |
| kiblnd_peer_connect_failed(peer, 1, rc); |
| kiblnd_peer_decref(peer); /* cmid's ref */ |
| rdma_destroy_id(cmid); |
| return; |
| failed: |
| kiblnd_peer_connect_failed(peer, 1, rc); |
| } |
| |
| void |
| kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) |
| { |
| kib_peer_t *peer; |
| kib_peer_t *peer2; |
| kib_conn_t *conn; |
| rwlock_t *g_lock = &kiblnd_data.kib_global_lock; |
| unsigned long flags; |
| int rc; |
| |
| /* |
| * If I get here, I've committed to send, so I complete the tx with |
| * failure on any problems |
| */ |
| LASSERT(!tx || !tx->tx_conn); /* only set when assigned a conn */ |
| LASSERT(!tx || tx->tx_nwrq > 0); /* work items have been set up */ |
| |
| /* |
| * First time, just use a read lock since I expect to find my peer |
| * connected |
| */ |
| read_lock_irqsave(g_lock, flags); |
| |
| peer = kiblnd_find_peer_locked(nid); |
| if (peer && !list_empty(&peer->ibp_conns)) { |
| /* Found a peer with an established connection */ |
| conn = kiblnd_get_conn_locked(peer); |
| kiblnd_conn_addref(conn); /* 1 ref for me... */ |
| |
| read_unlock_irqrestore(g_lock, flags); |
| |
| if (tx) |
| kiblnd_queue_tx(tx, conn); |
| kiblnd_conn_decref(conn); /* ...to here */ |
| return; |
| } |
| |
| read_unlock(g_lock); |
| /* Re-try with a write lock */ |
| write_lock(g_lock); |
| |
| peer = kiblnd_find_peer_locked(nid); |
| if (peer) { |
| if (list_empty(&peer->ibp_conns)) { |
| /* found a peer, but it's still connecting... */ |
| LASSERT(peer->ibp_connecting || |
| peer->ibp_accepting); |
| if (tx) |
| list_add_tail(&tx->tx_list, |
| &peer->ibp_tx_queue); |
| write_unlock_irqrestore(g_lock, flags); |
| } else { |
| conn = kiblnd_get_conn_locked(peer); |
| kiblnd_conn_addref(conn); /* 1 ref for me... */ |
| |
| write_unlock_irqrestore(g_lock, flags); |
| |
| if (tx) |
| kiblnd_queue_tx(tx, conn); |
| kiblnd_conn_decref(conn); /* ...to here */ |
| } |
| return; |
| } |
| |
| write_unlock_irqrestore(g_lock, flags); |
| |
| /* Allocate a peer ready to add to the peer table and retry */ |
| rc = kiblnd_create_peer(ni, &peer, nid); |
| if (rc) { |
| CERROR("Can't create peer %s\n", libcfs_nid2str(nid)); |
| if (tx) { |
| tx->tx_status = -EHOSTUNREACH; |
| tx->tx_waiting = 0; |
| kiblnd_tx_done(ni, tx); |
| } |
| return; |
| } |
| |
| write_lock_irqsave(g_lock, flags); |
| |
| peer2 = kiblnd_find_peer_locked(nid); |
| if (peer2) { |
| if (list_empty(&peer2->ibp_conns)) { |
| /* found a peer, but it's still connecting... */ |
| LASSERT(peer2->ibp_connecting || |
| peer2->ibp_accepting); |
| if (tx) |
| list_add_tail(&tx->tx_list, |
| &peer2->ibp_tx_queue); |
| write_unlock_irqrestore(g_lock, flags); |
| } else { |
| conn = kiblnd_get_conn_locked(peer2); |
| kiblnd_conn_addref(conn); /* 1 ref for me... */ |
| |
| write_unlock_irqrestore(g_lock, flags); |
| |
| if (tx) |
| kiblnd_queue_tx(tx, conn); |
| kiblnd_conn_decref(conn); /* ...to here */ |
| } |
| |
| kiblnd_peer_decref(peer); |
| return; |
| } |
| |
| /* Brand new peer */ |
| LASSERT(!peer->ibp_connecting); |
| peer->ibp_connecting = 1; |
| |
| /* always called with a ref on ni, which prevents ni being shutdown */ |
| LASSERT(!((kib_net_t *)ni->ni_data)->ibn_shutdown); |
| |
| if (tx) |
| list_add_tail(&tx->tx_list, &peer->ibp_tx_queue); |
| |
| kiblnd_peer_addref(peer); |
| list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); |
| |
| write_unlock_irqrestore(g_lock, flags); |
| |
| kiblnd_connect_peer(peer); |
| kiblnd_peer_decref(peer); |
| } |
| |
| int |
| kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) |
| { |
| lnet_hdr_t *hdr = &lntmsg->msg_hdr; |
| int type = lntmsg->msg_type; |
| lnet_process_id_t target = lntmsg->msg_target; |
| int target_is_router = lntmsg->msg_target_is_router; |
| int routing = lntmsg->msg_routing; |
| unsigned int payload_niov = lntmsg->msg_niov; |
| struct kvec *payload_iov = lntmsg->msg_iov; |
| lnet_kiov_t *payload_kiov = lntmsg->msg_kiov; |
| unsigned int payload_offset = lntmsg->msg_offset; |
| unsigned int payload_nob = lntmsg->msg_len; |
| kib_msg_t *ibmsg; |
| kib_rdma_desc_t *rd; |
| kib_tx_t *tx; |
| int nob; |
| int rc; |
| |
| /* NB 'private' is different depending on what we're sending.... */ |
| |
| CDEBUG(D_NET, "sending %d bytes in %d frags to %s\n", |
| payload_nob, payload_niov, libcfs_id2str(target)); |
| |
| LASSERT(!payload_nob || payload_niov > 0); |
| LASSERT(payload_niov <= LNET_MAX_IOV); |
| |
| /* Thread context */ |
| LASSERT(!in_interrupt()); |
| /* payload is either all vaddrs or all pages */ |
| LASSERT(!(payload_kiov && payload_iov)); |
| |
| switch (type) { |
| default: |
| LBUG(); |
| return -EIO; |
| |
| case LNET_MSG_ACK: |
| LASSERT(!payload_nob); |
| break; |
| |
| case LNET_MSG_GET: |
| if (routing || target_is_router) |
| break; /* send IMMEDIATE */ |
| |
| /* is the REPLY message too small for RDMA? */ |
| nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[lntmsg->msg_md->md_length]); |
| if (nob <= IBLND_MSG_SIZE) |
| break; /* send IMMEDIATE */ |
| |
| tx = kiblnd_get_idle_tx(ni, target.nid); |
| if (!tx) { |
| CERROR("Can't allocate txd for GET to %s\n", |
| libcfs_nid2str(target.nid)); |
| return -ENOMEM; |
| } |
| |
| ibmsg = tx->tx_msg; |
| rd = &ibmsg->ibm_u.get.ibgm_rd; |
| if (!(lntmsg->msg_md->md_options & LNET_MD_KIOV)) |
| rc = kiblnd_setup_rd_iov(ni, tx, rd, |
| lntmsg->msg_md->md_niov, |
| lntmsg->msg_md->md_iov.iov, |
| 0, lntmsg->msg_md->md_length); |
| else |
| rc = kiblnd_setup_rd_kiov(ni, tx, rd, |
| lntmsg->msg_md->md_niov, |
| lntmsg->msg_md->md_iov.kiov, |
| 0, lntmsg->msg_md->md_length); |
| if (rc) { |
| CERROR("Can't setup GET sink for %s: %d\n", |
| libcfs_nid2str(target.nid), rc); |
| kiblnd_tx_done(ni, tx); |
| return -EIO; |
| } |
| |
| nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[rd->rd_nfrags]); |
| ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie; |
| ibmsg->ibm_u.get.ibgm_hdr = *hdr; |
| |
| kiblnd_init_tx_msg(ni, tx, IBLND_MSG_GET_REQ, nob); |
| |
| tx->tx_lntmsg[1] = lnet_create_reply_msg(ni, lntmsg); |
| if (!tx->tx_lntmsg[1]) { |
| CERROR("Can't create reply for GET -> %s\n", |
| libcfs_nid2str(target.nid)); |
| kiblnd_tx_done(ni, tx); |
| return -EIO; |
| } |
| |
| tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg[0,1] on completion */ |
| tx->tx_waiting = 1; /* waiting for GET_DONE */ |
| kiblnd_launch_tx(ni, tx, target.nid); |
| return 0; |
| |
| case LNET_MSG_REPLY: |
| case LNET_MSG_PUT: |
| /* Is the payload small enough not to need RDMA? */ |
| nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]); |
| if (nob <= IBLND_MSG_SIZE) |
| break; /* send IMMEDIATE */ |
| |
| tx = kiblnd_get_idle_tx(ni, target.nid); |
| if (!tx) { |
| CERROR("Can't allocate %s txd for %s\n", |
| type == LNET_MSG_PUT ? "PUT" : "REPLY", |
| libcfs_nid2str(target.nid)); |
| return -ENOMEM; |
| } |
| |
| if (!payload_kiov) |
| rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd, |
| payload_niov, payload_iov, |
| payload_offset, payload_nob); |
| else |
| rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, |
| payload_niov, payload_kiov, |
| payload_offset, payload_nob); |
| if (rc) { |
| CERROR("Can't setup PUT src for %s: %d\n", |
| libcfs_nid2str(target.nid), rc); |
| kiblnd_tx_done(ni, tx); |
| return -EIO; |
| } |
| |
| ibmsg = tx->tx_msg; |
| ibmsg->ibm_u.putreq.ibprm_hdr = *hdr; |
| ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie; |
| kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_REQ, sizeof(kib_putreq_msg_t)); |
| |
| tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ |
| tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */ |
| kiblnd_launch_tx(ni, tx, target.nid); |
| return 0; |
| } |
| |
| /* send IMMEDIATE */ |
| |
| LASSERT(offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]) |
| <= IBLND_MSG_SIZE); |
| |
| tx = kiblnd_get_idle_tx(ni, target.nid); |
| if (!tx) { |
| CERROR("Can't send %d to %s: tx descs exhausted\n", |
| type, libcfs_nid2str(target.nid)); |
| return -ENOMEM; |
| } |
| |
| ibmsg = tx->tx_msg; |
| ibmsg->ibm_u.immediate.ibim_hdr = *hdr; |
| |
| if (payload_kiov) |
| lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg, |
| offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), |
| payload_niov, payload_kiov, |
| payload_offset, payload_nob); |
| else |
| lnet_copy_iov2flat(IBLND_MSG_SIZE, ibmsg, |
| offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), |
| payload_niov, payload_iov, |
| payload_offset, payload_nob); |
| |
| nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]); |
| kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob); |
| |
| tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ |
| kiblnd_launch_tx(ni, tx, target.nid); |
| return 0; |
| } |
| |
| static void |
| kiblnd_reply(lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg) |
| { |
| lnet_process_id_t target = lntmsg->msg_target; |
| unsigned int niov = lntmsg->msg_niov; |
| struct kvec *iov = lntmsg->msg_iov; |
| lnet_kiov_t *kiov = lntmsg->msg_kiov; |
| unsigned int offset = lntmsg->msg_offset; |
| unsigned int nob = lntmsg->msg_len; |
| kib_tx_t *tx; |
| int rc; |
| |
| tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid); |
| if (!tx) { |
| CERROR("Can't get tx for REPLY to %s\n", |
| libcfs_nid2str(target.nid)); |
| goto failed_0; |
| } |
| |
| if (!nob) |
| rc = 0; |
| else if (!kiov) |
| rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd, |
| niov, iov, offset, nob); |
| else |
| rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, |
| niov, kiov, offset, nob); |
| |
| if (rc) { |
| CERROR("Can't setup GET src for %s: %d\n", |
| libcfs_nid2str(target.nid), rc); |
| goto failed_1; |
| } |
| |
| rc = kiblnd_init_rdma(rx->rx_conn, tx, |
| IBLND_MSG_GET_DONE, nob, |
| &rx->rx_msg->ibm_u.get.ibgm_rd, |
| rx->rx_msg->ibm_u.get.ibgm_cookie); |
| if (rc < 0) { |
| CERROR("Can't setup rdma for GET from %s: %d\n", |
| libcfs_nid2str(target.nid), rc); |
| goto failed_1; |
| } |
| |
| if (!nob) { |
| /* No RDMA: local completion may happen now! */ |
| lnet_finalize(ni, lntmsg, 0); |
| } else { |
| /* RDMA: lnet_finalize(lntmsg) when it completes */ |
| tx->tx_lntmsg[0] = lntmsg; |
| } |
| |
| kiblnd_queue_tx(tx, rx->rx_conn); |
| return; |
| |
| failed_1: |
| kiblnd_tx_done(ni, tx); |
| failed_0: |
| lnet_finalize(ni, lntmsg, -EIO); |
| } |
| |
| int |
| kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, |
| unsigned int niov, struct kvec *iov, lnet_kiov_t *kiov, |
| unsigned int offset, unsigned int mlen, unsigned int rlen) |
| { |
| kib_rx_t *rx = private; |
| kib_msg_t *rxmsg = rx->rx_msg; |
| kib_conn_t *conn = rx->rx_conn; |
| kib_tx_t *tx; |
| int nob; |
| int post_credit = IBLND_POSTRX_PEER_CREDIT; |
| int rc = 0; |
| |
| LASSERT(mlen <= rlen); |
| LASSERT(!in_interrupt()); |
| /* Either all pages or all vaddrs */ |
| LASSERT(!(kiov && iov)); |
| |
| switch (rxmsg->ibm_type) { |
| default: |
| LBUG(); |
| |
| case IBLND_MSG_IMMEDIATE: |
| nob = offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[rlen]); |
| if (nob > rx->rx_nob) { |
| CERROR("Immediate message from %s too big: %d(%d)\n", |
| libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid), |
| nob, rx->rx_nob); |
| rc = -EPROTO; |
| break; |
| } |
| |
| if (kiov) |
| lnet_copy_flat2kiov(niov, kiov, offset, |
| IBLND_MSG_SIZE, rxmsg, |
| offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), |
| mlen); |
| else |
| lnet_copy_flat2iov(niov, iov, offset, |
| IBLND_MSG_SIZE, rxmsg, |
| offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), |
| mlen); |
| lnet_finalize(ni, lntmsg, 0); |
| break; |
| |
| case IBLND_MSG_PUT_REQ: { |
| kib_msg_t *txmsg; |
| kib_rdma_desc_t *rd; |
| |
| if (!mlen) { |
| lnet_finalize(ni, lntmsg, 0); |
| kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0, |
| rxmsg->ibm_u.putreq.ibprm_cookie); |
| break; |
| } |
| |
| tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); |
| if (!tx) { |
| CERROR("Can't allocate tx for %s\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| /* Not replying will break the connection */ |
| rc = -ENOMEM; |
| break; |
| } |
| |
| txmsg = tx->tx_msg; |
| rd = &txmsg->ibm_u.putack.ibpam_rd; |
| if (!kiov) |
| rc = kiblnd_setup_rd_iov(ni, tx, rd, |
| niov, iov, offset, mlen); |
| else |
| rc = kiblnd_setup_rd_kiov(ni, tx, rd, |
| niov, kiov, offset, mlen); |
| if (rc) { |
| CERROR("Can't setup PUT sink for %s: %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), rc); |
| kiblnd_tx_done(ni, tx); |
| /* tell peer it's over */ |
| kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, rc, |
| rxmsg->ibm_u.putreq.ibprm_cookie); |
| break; |
| } |
| |
| nob = offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[rd->rd_nfrags]); |
| txmsg->ibm_u.putack.ibpam_src_cookie = rxmsg->ibm_u.putreq.ibprm_cookie; |
| txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie; |
| |
| kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_ACK, nob); |
| |
| tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ |
| tx->tx_waiting = 1; /* waiting for PUT_DONE */ |
| kiblnd_queue_tx(tx, conn); |
| |
| /* reposted buffer reserved for PUT_DONE */ |
| post_credit = IBLND_POSTRX_NO_CREDIT; |
| break; |
| } |
| |
| case IBLND_MSG_GET_REQ: |
| if (lntmsg) { |
| /* Optimized GET; RDMA lntmsg's payload */ |
| kiblnd_reply(ni, rx, lntmsg); |
| } else { |
| /* GET didn't match anything */ |
| kiblnd_send_completion(rx->rx_conn, IBLND_MSG_GET_DONE, |
| -ENODATA, |
| rxmsg->ibm_u.get.ibgm_cookie); |
| } |
| break; |
| } |
| |
| kiblnd_post_rx(rx, post_credit); |
| return rc; |
| } |
| |
| int |
| kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name) |
| { |
| struct task_struct *task = kthread_run(fn, arg, "%s", name); |
| |
| if (IS_ERR(task)) |
| return PTR_ERR(task); |
| |
| atomic_inc(&kiblnd_data.kib_nthreads); |
| return 0; |
| } |
| |
| static void |
| kiblnd_thread_fini(void) |
| { |
| atomic_dec(&kiblnd_data.kib_nthreads); |
| } |
| |
| static void |
| kiblnd_peer_alive(kib_peer_t *peer) |
| { |
| /* This is racy, but everyone's only writing cfs_time_current() */ |
| peer->ibp_last_alive = cfs_time_current(); |
| mb(); |
| } |
| |
| static void |
| kiblnd_peer_notify(kib_peer_t *peer) |
| { |
| int error = 0; |
| unsigned long last_alive = 0; |
| unsigned long flags; |
| |
| read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| |
| if (list_empty(&peer->ibp_conns) && |
| !peer->ibp_accepting && |
| !peer->ibp_connecting && |
| peer->ibp_error) { |
| error = peer->ibp_error; |
| peer->ibp_error = 0; |
| |
| last_alive = peer->ibp_last_alive; |
| } |
| |
| read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| if (error) |
| lnet_notify(peer->ibp_ni, |
| peer->ibp_nid, 0, last_alive); |
| } |
| |
| void |
| kiblnd_close_conn_locked(kib_conn_t *conn, int error) |
| { |
| /* |
| * This just does the immediate housekeeping. 'error' is zero for a |
| * normal shutdown which can happen only after the connection has been |
| * established. If the connection is established, schedule the |
| * connection to be finished off by the connd. Otherwise the connd is |
| * already dealing with it (either to set it up or tear it down). |
| * Caller holds kib_global_lock exclusively in irq context |
| */ |
| kib_peer_t *peer = conn->ibc_peer; |
| kib_dev_t *dev; |
| unsigned long flags; |
| |
| LASSERT(error || conn->ibc_state >= IBLND_CONN_ESTABLISHED); |
| |
| if (error && !conn->ibc_comms_error) |
| conn->ibc_comms_error = error; |
| |
| if (conn->ibc_state != IBLND_CONN_ESTABLISHED) |
| return; /* already being handled */ |
| |
| if (!error && |
| list_empty(&conn->ibc_tx_noops) && |
| list_empty(&conn->ibc_tx_queue) && |
| list_empty(&conn->ibc_tx_queue_rsrvd) && |
| list_empty(&conn->ibc_tx_queue_nocred) && |
| list_empty(&conn->ibc_active_txs)) { |
| CDEBUG(D_NET, "closing conn to %s\n", |
| libcfs_nid2str(peer->ibp_nid)); |
| } else { |
| CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n", |
| libcfs_nid2str(peer->ibp_nid), error, |
| list_empty(&conn->ibc_tx_queue) ? "" : "(sending)", |
| list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)", |
| list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)", |
| list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)", |
| list_empty(&conn->ibc_active_txs) ? "" : "(waiting)"); |
| } |
| |
| dev = ((kib_net_t *)peer->ibp_ni->ni_data)->ibn_dev; |
| list_del(&conn->ibc_list); |
| /* connd (see below) takes over ibc_list's ref */ |
| |
| if (list_empty(&peer->ibp_conns) && /* no more conns */ |
| kiblnd_peer_active(peer)) { /* still in peer table */ |
| kiblnd_unlink_peer_locked(peer); |
| |
| /* set/clear error on last conn */ |
| peer->ibp_error = conn->ibc_comms_error; |
| } |
| |
| kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING); |
| |
| if (error && |
| kiblnd_dev_can_failover(dev)) { |
| list_add_tail(&dev->ibd_fail_list, |
| &kiblnd_data.kib_failed_devs); |
| wake_up(&kiblnd_data.kib_failover_waitq); |
| } |
| |
| spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| |
| list_add_tail(&conn->ibc_list, &kiblnd_data.kib_connd_conns); |
| wake_up(&kiblnd_data.kib_connd_waitq); |
| |
| spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); |
| } |
| |
| void |
| kiblnd_close_conn(kib_conn_t *conn, int error) |
| { |
| unsigned long flags; |
| |
| write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| |
| kiblnd_close_conn_locked(conn, error); |
| |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| } |
| |
| static void |
| kiblnd_handle_early_rxs(kib_conn_t *conn) |
| { |
| unsigned long flags; |
| kib_rx_t *rx; |
| kib_rx_t *tmp; |
| |
| LASSERT(!in_interrupt()); |
| LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED); |
| |
| write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| list_for_each_entry_safe(rx, tmp, &conn->ibc_early_rxs, rx_list) { |
| list_del(&rx->rx_list); |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| kiblnd_handle_rx(rx); |
| |
| write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| } |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| } |
| |
| static void |
| kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs) |
| { |
| LIST_HEAD(zombies); |
| struct list_head *tmp; |
| struct list_head *nxt; |
| kib_tx_t *tx; |
| |
| spin_lock(&conn->ibc_lock); |
| |
| list_for_each_safe(tmp, nxt, txs) { |
| tx = list_entry(tmp, kib_tx_t, tx_list); |
| |
| if (txs == &conn->ibc_active_txs) { |
| LASSERT(!tx->tx_queued); |
| LASSERT(tx->tx_waiting || tx->tx_sending); |
| } else { |
| LASSERT(tx->tx_queued); |
| } |
| |
| tx->tx_status = -ECONNABORTED; |
| tx->tx_waiting = 0; |
| |
| if (!tx->tx_sending) { |
| tx->tx_queued = 0; |
| list_del(&tx->tx_list); |
| list_add(&tx->tx_list, &zombies); |
| } |
| } |
| |
| spin_unlock(&conn->ibc_lock); |
| |
| kiblnd_txlist_done(conn->ibc_peer->ibp_ni, &zombies, -ECONNABORTED); |
| } |
| |
| static void |
| kiblnd_finalise_conn(kib_conn_t *conn) |
| { |
| LASSERT(!in_interrupt()); |
| LASSERT(conn->ibc_state > IBLND_CONN_INIT); |
| |
| kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED); |
| |
| /* |
| * abort_receives moves QP state to IB_QPS_ERR. This is only required |
| * for connections that didn't get as far as being connected, because |
| * rdma_disconnect() does this for free. |
| */ |
| kiblnd_abort_receives(conn); |
| |
| /* |
| * Complete all tx descs not waiting for sends to complete. |
| * NB we should be safe from RDMA now that the QP has changed state |
| */ |
| kiblnd_abort_txs(conn, &conn->ibc_tx_noops); |
| kiblnd_abort_txs(conn, &conn->ibc_tx_queue); |
| kiblnd_abort_txs(conn, &conn->ibc_tx_queue_rsrvd); |
| kiblnd_abort_txs(conn, &conn->ibc_tx_queue_nocred); |
| kiblnd_abort_txs(conn, &conn->ibc_active_txs); |
| |
| kiblnd_handle_early_rxs(conn); |
| } |
| |
| static void |
| kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error) |
| { |
| LIST_HEAD(zombies); |
| unsigned long flags; |
| |
| LASSERT(error); |
| LASSERT(!in_interrupt()); |
| |
| write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| |
| if (active) { |
| LASSERT(peer->ibp_connecting > 0); |
| peer->ibp_connecting--; |
| } else { |
| LASSERT(peer->ibp_accepting > 0); |
| peer->ibp_accepting--; |
| } |
| |
| if (peer->ibp_connecting || |
| peer->ibp_accepting) { |
| /* another connection attempt under way... */ |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, |
| flags); |
| return; |
| } |
| |
| if (list_empty(&peer->ibp_conns)) { |
| /* Take peer's blocked transmits to complete with error */ |
| list_add(&zombies, &peer->ibp_tx_queue); |
| list_del_init(&peer->ibp_tx_queue); |
| |
| if (kiblnd_peer_active(peer)) |
| kiblnd_unlink_peer_locked(peer); |
| |
| peer->ibp_error = error; |
| } else { |
| /* Can't have blocked transmits if there are connections */ |
| LASSERT(list_empty(&peer->ibp_tx_queue)); |
| } |
| |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| kiblnd_peer_notify(peer); |
| |
| if (list_empty(&zombies)) |
| return; |
| |
| CNETERR("Deleting messages for %s: connection failed\n", |
| libcfs_nid2str(peer->ibp_nid)); |
| |
| kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH); |
| } |
| |
| static void |
| kiblnd_connreq_done(kib_conn_t *conn, int status) |
| { |
| kib_peer_t *peer = conn->ibc_peer; |
| kib_tx_t *tx; |
| kib_tx_t *tmp; |
| struct list_head txs; |
| unsigned long flags; |
| int active; |
| |
| active = (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); |
| |
| CDEBUG(D_NET, "%s: active(%d), version(%x), status(%d)\n", |
| libcfs_nid2str(peer->ibp_nid), active, |
| conn->ibc_version, status); |
| |
| LASSERT(!in_interrupt()); |
| LASSERT((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT && |
| peer->ibp_connecting > 0) || |
| (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT && |
| peer->ibp_accepting > 0)); |
| |
| LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); |
| conn->ibc_connvars = NULL; |
| |
| if (status) { |
| /* failed to establish connection */ |
| kiblnd_peer_connect_failed(peer, active, status); |
| kiblnd_finalise_conn(conn); |
| return; |
| } |
| |
| /* connection established */ |
| write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| |
| conn->ibc_last_send = jiffies; |
| kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED); |
| kiblnd_peer_alive(peer); |
| |
| /* |
| * Add conn to peer's list and nuke any dangling conns from a different |
| * peer instance... |
| */ |
| kiblnd_conn_addref(conn); /* +1 ref for ibc_list */ |
| list_add(&conn->ibc_list, &peer->ibp_conns); |
| if (active) |
| peer->ibp_connecting--; |
| else |
| peer->ibp_accepting--; |
| |
| if (!peer->ibp_version) { |
| peer->ibp_version = conn->ibc_version; |
| peer->ibp_incarnation = conn->ibc_incarnation; |
| } |
| |
| if (peer->ibp_version != conn->ibc_version || |
| peer->ibp_incarnation != conn->ibc_incarnation) { |
| kiblnd_close_stale_conns_locked(peer, conn->ibc_version, |
| conn->ibc_incarnation); |
| peer->ibp_version = conn->ibc_version; |
| peer->ibp_incarnation = conn->ibc_incarnation; |
| } |
| |
| /* grab pending txs while I have the lock */ |
| list_add(&txs, &peer->ibp_tx_queue); |
| list_del_init(&peer->ibp_tx_queue); |
| |
| if (!kiblnd_peer_active(peer) || /* peer has been deleted */ |
| conn->ibc_comms_error) { /* error has happened already */ |
| lnet_ni_t *ni = peer->ibp_ni; |
| |
| /* start to shut down connection */ |
| kiblnd_close_conn_locked(conn, -ECONNABORTED); |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| kiblnd_txlist_done(ni, &txs, -ECONNABORTED); |
| |
| return; |
| } |
| |
| /** |
| * refcount taken by cmid is not reliable after I released the glock |
| * because this connection is visible to other threads now, another |
| * thread can find and close this connection right after I released |
| * the glock, if kiblnd_cm_callback for RDMA_CM_EVENT_DISCONNECTED is |
| * called, it can release the connection refcount taken by cmid. |
| * It means the connection could be destroyed before I finish my |
| * operations on it. |
| */ |
| kiblnd_conn_addref(conn); |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| /* Schedule blocked txs */ |
| spin_lock(&conn->ibc_lock); |
| list_for_each_entry_safe(tx, tmp, &txs, tx_list) { |
| list_del(&tx->tx_list); |
| |
| kiblnd_queue_tx_locked(tx, conn); |
| } |
| spin_unlock(&conn->ibc_lock); |
| |
| kiblnd_check_sends(conn); |
| |
| /* schedule blocked rxs */ |
| kiblnd_handle_early_rxs(conn); |
| |
| kiblnd_conn_decref(conn); |
| } |
| |
| static void |
| kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej) |
| { |
| int rc; |
| |
| rc = rdma_reject(cmid, rej, sizeof(*rej)); |
| |
| if (rc) |
| CWARN("Error %d sending reject\n", rc); |
| } |
| |
| static int |
| kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) |
| { |
| rwlock_t *g_lock = &kiblnd_data.kib_global_lock; |
| kib_msg_t *reqmsg = priv; |
| kib_msg_t *ackmsg; |
| kib_dev_t *ibdev; |
| kib_peer_t *peer; |
| kib_peer_t *peer2; |
| kib_conn_t *conn; |
| lnet_ni_t *ni = NULL; |
| kib_net_t *net = NULL; |
| lnet_nid_t nid; |
| struct rdma_conn_param cp; |
| kib_rej_t rej; |
| int version = IBLND_MSG_VERSION; |
| unsigned long flags; |
| int rc; |
| struct sockaddr_in *peer_addr; |
| |
| LASSERT(!in_interrupt()); |
| |
| /* cmid inherits 'context' from the corresponding listener id */ |
| ibdev = (kib_dev_t *)cmid->context; |
| LASSERT(ibdev); |
| |
| memset(&rej, 0, sizeof(rej)); |
| rej.ibr_magic = IBLND_MSG_MAGIC; |
| rej.ibr_why = IBLND_REJECT_FATAL; |
| rej.ibr_cp.ibcp_max_msg_size = IBLND_MSG_SIZE; |
| |
| peer_addr = (struct sockaddr_in *)&cmid->route.addr.dst_addr; |
| if (*kiblnd_tunables.kib_require_priv_port && |
| ntohs(peer_addr->sin_port) >= PROT_SOCK) { |
| __u32 ip = ntohl(peer_addr->sin_addr.s_addr); |
| |
| CERROR("Peer's port (%pI4h:%hu) is not privileged\n", |
| &ip, ntohs(peer_addr->sin_port)); |
| goto failed; |
| } |
| |
| if (priv_nob < offsetof(kib_msg_t, ibm_type)) { |
| CERROR("Short connection request\n"); |
| goto failed; |
| } |
| |
| /* |
| * Future protocol version compatibility support! If the |
| * o2iblnd-specific protocol changes, or when LNET unifies |
| * protocols over all LNDs, the initial connection will |
| * negotiate a protocol version. I trap this here to avoid |
| * console errors; the reject tells the peer which protocol I |
| * speak. |
| */ |
| if (reqmsg->ibm_magic == LNET_PROTO_MAGIC || |
| reqmsg->ibm_magic == __swab32(LNET_PROTO_MAGIC)) |
| goto failed; |
| if (reqmsg->ibm_magic == IBLND_MSG_MAGIC && |
| reqmsg->ibm_version != IBLND_MSG_VERSION && |
| reqmsg->ibm_version != IBLND_MSG_VERSION_1) |
| goto failed; |
| if (reqmsg->ibm_magic == __swab32(IBLND_MSG_MAGIC) && |
| reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION) && |
| reqmsg->ibm_version != __swab16(IBLND_MSG_VERSION_1)) |
| goto failed; |
| |
| rc = kiblnd_unpack_msg(reqmsg, priv_nob); |
| if (rc) { |
| CERROR("Can't parse connection request: %d\n", rc); |
| goto failed; |
| } |
| |
| nid = reqmsg->ibm_srcnid; |
| ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid)); |
| |
| if (ni) { |
| net = (kib_net_t *)ni->ni_data; |
| rej.ibr_incarnation = net->ibn_incarnation; |
| } |
| |
| if (!ni || /* no matching net */ |
| ni->ni_nid != reqmsg->ibm_dstnid || /* right NET, wrong NID! */ |
| net->ibn_dev != ibdev) { /* wrong device */ |
| CERROR("Can't accept conn from %s on %s (%s:%d:%pI4h): bad dst nid %s\n", |
| libcfs_nid2str(nid), |
| !ni ? "NA" : libcfs_nid2str(ni->ni_nid), |
| ibdev->ibd_ifname, ibdev->ibd_nnets, |
| &ibdev->ibd_ifip, |
| libcfs_nid2str(reqmsg->ibm_dstnid)); |
| |
| goto failed; |
| } |
| |
| /* check time stamp as soon as possible */ |
| if (reqmsg->ibm_dststamp && |
| reqmsg->ibm_dststamp != net->ibn_incarnation) { |
| CWARN("Stale connection request\n"); |
| rej.ibr_why = IBLND_REJECT_CONN_STALE; |
| goto failed; |
| } |
| |
| /* I can accept peer's version */ |
| version = reqmsg->ibm_version; |
| |
| if (reqmsg->ibm_type != IBLND_MSG_CONNREQ) { |
| CERROR("Unexpected connreq msg type: %x from %s\n", |
| reqmsg->ibm_type, libcfs_nid2str(nid)); |
| goto failed; |
| } |
| |
| if (reqmsg->ibm_u.connparams.ibcp_queue_depth > |
| IBLND_MSG_QUEUE_SIZE(version)) { |
| CERROR("Can't accept conn from %s, queue depth too large: %d (<=%d wanted)\n", |
| libcfs_nid2str(nid), |
| reqmsg->ibm_u.connparams.ibcp_queue_depth, |
| IBLND_MSG_QUEUE_SIZE(version)); |
| |
| if (version == IBLND_MSG_VERSION) |
| rej.ibr_why = IBLND_REJECT_MSG_QUEUE_SIZE; |
| |
| goto failed; |
| } |
| |
| if (reqmsg->ibm_u.connparams.ibcp_max_frags > |
| IBLND_RDMA_FRAGS(version)) { |
| CWARN("Can't accept conn from %s (version %x): max_frags %d too large (%d wanted)\n", |
| libcfs_nid2str(nid), version, |
| reqmsg->ibm_u.connparams.ibcp_max_frags, |
| IBLND_RDMA_FRAGS(version)); |
| |
| if (version >= IBLND_MSG_VERSION) |
| rej.ibr_why = IBLND_REJECT_RDMA_FRAGS; |
| |
| goto failed; |
| } else if (reqmsg->ibm_u.connparams.ibcp_max_frags < |
| IBLND_RDMA_FRAGS(version) && !net->ibn_fmr_ps) { |
| CWARN("Can't accept conn from %s (version %x): max_frags %d incompatible without FMR pool (%d wanted)\n", |
| libcfs_nid2str(nid), version, |
| reqmsg->ibm_u.connparams.ibcp_max_frags, |
| IBLND_RDMA_FRAGS(version)); |
| |
| if (version >= IBLND_MSG_VERSION) |
| rej.ibr_why = IBLND_REJECT_RDMA_FRAGS; |
| |
| goto failed; |
| } |
| |
| if (reqmsg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) { |
| CERROR("Can't accept %s: message size %d too big (%d max)\n", |
| libcfs_nid2str(nid), |
| reqmsg->ibm_u.connparams.ibcp_max_msg_size, |
| IBLND_MSG_SIZE); |
| goto failed; |
| } |
| |
| /* assume 'nid' is a new peer; create */ |
| rc = kiblnd_create_peer(ni, &peer, nid); |
| if (rc) { |
| CERROR("Can't create peer for %s\n", libcfs_nid2str(nid)); |
| rej.ibr_why = IBLND_REJECT_NO_RESOURCES; |
| goto failed; |
| } |
| |
| /* We have validated the peer's parameters so use those */ |
| peer->ibp_max_frags = reqmsg->ibm_u.connparams.ibcp_max_frags; |
| peer->ibp_queue_depth = reqmsg->ibm_u.connparams.ibcp_queue_depth; |
| |
| write_lock_irqsave(g_lock, flags); |
| |
| peer2 = kiblnd_find_peer_locked(nid); |
| if (peer2) { |
| if (!peer2->ibp_version) { |
| peer2->ibp_version = version; |
| peer2->ibp_incarnation = reqmsg->ibm_srcstamp; |
| } |
| |
| /* not the guy I've talked with */ |
| if (peer2->ibp_incarnation != reqmsg->ibm_srcstamp || |
| peer2->ibp_version != version) { |
| kiblnd_close_peer_conns_locked(peer2, -ESTALE); |
| write_unlock_irqrestore(g_lock, flags); |
| |
| CWARN("Conn stale %s [old ver: %x, new ver: %x]\n", |
| libcfs_nid2str(nid), peer2->ibp_version, version); |
| |
| kiblnd_peer_decref(peer); |
| rej.ibr_why = IBLND_REJECT_CONN_STALE; |
| goto failed; |
| } |
| |
| /* tie-break connection race in favour of the higher NID */ |
| if (peer2->ibp_connecting && |
| nid < ni->ni_nid) { |
| write_unlock_irqrestore(g_lock, flags); |
| |
| CWARN("Conn race %s\n", libcfs_nid2str(peer2->ibp_nid)); |
| |
| kiblnd_peer_decref(peer); |
| rej.ibr_why = IBLND_REJECT_CONN_RACE; |
| goto failed; |
| } |
| |
| peer2->ibp_accepting++; |
| kiblnd_peer_addref(peer2); |
| |
| /** |
| * Race with kiblnd_launch_tx (active connect) to create peer |
| * so copy validated parameters since we now know what the |
| * peer's limits are |
| */ |
| peer2->ibp_max_frags = peer->ibp_max_frags; |
| peer2->ibp_queue_depth = peer->ibp_queue_depth; |
| |
| write_unlock_irqrestore(g_lock, flags); |
| kiblnd_peer_decref(peer); |
| peer = peer2; |
| } else { |
| /* Brand new peer */ |
| LASSERT(!peer->ibp_accepting); |
| LASSERT(!peer->ibp_version && |
| !peer->ibp_incarnation); |
| |
| peer->ibp_accepting = 1; |
| peer->ibp_version = version; |
| peer->ibp_incarnation = reqmsg->ibm_srcstamp; |
| |
| /* I have a ref on ni that prevents it being shutdown */ |
| LASSERT(!net->ibn_shutdown); |
| |
| kiblnd_peer_addref(peer); |
| list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); |
| |
| write_unlock_irqrestore(g_lock, flags); |
| } |
| |
| conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, |
| version); |
| if (!conn) { |
| kiblnd_peer_connect_failed(peer, 0, -ENOMEM); |
| kiblnd_peer_decref(peer); |
| rej.ibr_why = IBLND_REJECT_NO_RESOURCES; |
| goto failed; |
| } |
| |
| /* |
| * conn now "owns" cmid, so I return success from here on to ensure the |
| * CM callback doesn't destroy cmid. |
| */ |
| conn->ibc_incarnation = reqmsg->ibm_srcstamp; |
| conn->ibc_credits = conn->ibc_queue_depth; |
| conn->ibc_reserved_credits = conn->ibc_queue_depth; |
| LASSERT(conn->ibc_credits + conn->ibc_reserved_credits + |
| IBLND_OOB_MSGS(version) <= IBLND_RX_MSGS(conn)); |
| |
| ackmsg = &conn->ibc_connvars->cv_msg; |
| memset(ackmsg, 0, sizeof(*ackmsg)); |
| |
| kiblnd_init_msg(ackmsg, IBLND_MSG_CONNACK, |
| sizeof(ackmsg->ibm_u.connparams)); |
| ackmsg->ibm_u.connparams.ibcp_queue_depth = conn->ibc_queue_depth; |
| ackmsg->ibm_u.connparams.ibcp_max_frags = conn->ibc_max_frags; |
| ackmsg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE; |
| |
| kiblnd_pack_msg(ni, ackmsg, version, 0, nid, reqmsg->ibm_srcstamp); |
| |
| memset(&cp, 0, sizeof(cp)); |
| cp.private_data = ackmsg; |
| cp.private_data_len = ackmsg->ibm_nob; |
| cp.responder_resources = 0; /* No atomic ops or RDMA reads */ |
| cp.initiator_depth = 0; |
| cp.flow_control = 1; |
| cp.retry_count = *kiblnd_tunables.kib_retry_count; |
| cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count; |
| |
| CDEBUG(D_NET, "Accept %s\n", libcfs_nid2str(nid)); |
| |
| rc = rdma_accept(cmid, &cp); |
| if (rc) { |
| CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid), rc); |
| rej.ibr_version = version; |
| rej.ibr_why = IBLND_REJECT_FATAL; |
| |
| kiblnd_reject(cmid, &rej); |
| kiblnd_connreq_done(conn, rc); |
| kiblnd_conn_decref(conn); |
| } |
| |
| lnet_ni_decref(ni); |
| return 0; |
| |
| failed: |
| if (ni) |
| lnet_ni_decref(ni); |
| |
| rej.ibr_version = version; |
| rej.ibr_cp.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); |
| rej.ibr_cp.ibcp_max_frags = IBLND_RDMA_FRAGS(version); |
| kiblnd_reject(cmid, &rej); |
| |
| return -ECONNREFUSED; |
| } |
| |
| static void |
| kiblnd_reconnect(kib_conn_t *conn, int version, |
| __u64 incarnation, int why, kib_connparams_t *cp) |
| { |
| kib_peer_t *peer = conn->ibc_peer; |
| char *reason; |
| int retry = 0; |
| unsigned long flags; |
| |
| LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); |
| LASSERT(peer->ibp_connecting > 0); /* 'conn' at least */ |
| |
| write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| |
| /* |
| * retry connection if it's still needed and no other connection |
| * attempts (active or passive) are in progress |
| * NB: reconnect is still needed even when ibp_tx_queue is |
| * empty if ibp_version != version because reconnect may be |
| * initiated by kiblnd_query() |
| */ |
| if ((!list_empty(&peer->ibp_tx_queue) || |
| peer->ibp_version != version) && |
| peer->ibp_connecting == 1 && |
| !peer->ibp_accepting) { |
| retry = 1; |
| peer->ibp_connecting++; |
| |
| peer->ibp_version = version; |
| peer->ibp_incarnation = incarnation; |
| } |
| |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| if (!retry) |
| return; |
| |
| switch (why) { |
| default: |
| reason = "Unknown"; |
| break; |
| |
| case IBLND_REJECT_RDMA_FRAGS: |
| if (!cp) |
| goto failed; |
| |
| if (conn->ibc_max_frags <= cp->ibcp_max_frags) { |
| CNETERR("Unsupported max frags, peer supports %d\n", |
| cp->ibcp_max_frags); |
| goto failed; |
| } else if (!*kiblnd_tunables.kib_map_on_demand) { |
| CNETERR("map_on_demand must be enabled to support map_on_demand peers\n"); |
| goto failed; |
| } |
| |
| peer->ibp_max_frags = cp->ibcp_max_frags; |
| reason = "rdma fragments"; |
| break; |
| |
| case IBLND_REJECT_MSG_QUEUE_SIZE: |
| if (!cp) |
| goto failed; |
| |
| if (conn->ibc_queue_depth <= cp->ibcp_queue_depth) { |
| CNETERR("Unsupported queue depth, peer supports %d\n", |
| cp->ibcp_queue_depth); |
| goto failed; |
| } |
| |
| peer->ibp_queue_depth = cp->ibcp_queue_depth; |
| reason = "queue depth"; |
| break; |
| |
| case IBLND_REJECT_CONN_STALE: |
| reason = "stale"; |
| break; |
| |
| case IBLND_REJECT_CONN_RACE: |
| reason = "conn race"; |
| break; |
| |
| case IBLND_REJECT_CONN_UNCOMPAT: |
| reason = "version negotiation"; |
| break; |
| } |
| |
| CNETERR("%s: retrying (%s), %x, %x, queue_dep: %d, max_frag: %d, msg_size: %d\n", |
| libcfs_nid2str(peer->ibp_nid), |
| reason, IBLND_MSG_VERSION, version, |
| conn->ibc_queue_depth, conn->ibc_max_frags, |
| cp ? cp->ibcp_max_msg_size : IBLND_MSG_SIZE); |
| |
| kiblnd_connect_peer(peer); |
| return; |
| failed: |
| write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| peer->ibp_connecting--; |
| write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| return; |
| } |
| |
| static void |
| kiblnd_rejected(kib_conn_t *conn, int reason, void *priv, int priv_nob) |
| { |
| kib_peer_t *peer = conn->ibc_peer; |
| |
| LASSERT(!in_interrupt()); |
| LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); |
| |
| switch (reason) { |
| case IB_CM_REJ_STALE_CONN: |
| kiblnd_reconnect(conn, IBLND_MSG_VERSION, 0, |
| IBLND_REJECT_CONN_STALE, NULL); |
| break; |
| |
| case IB_CM_REJ_INVALID_SERVICE_ID: |
| CNETERR("%s rejected: no listener at %d\n", |
| libcfs_nid2str(peer->ibp_nid), |
| *kiblnd_tunables.kib_service); |
| break; |
| |
| case IB_CM_REJ_CONSUMER_DEFINED: |
| if (priv_nob >= offsetof(kib_rej_t, ibr_padding)) { |
| kib_rej_t *rej = priv; |
| kib_connparams_t *cp = NULL; |
| int flip = 0; |
| __u64 incarnation = -1; |
| |
| /* NB. default incarnation is -1 because: |
| * a) V1 will ignore dst incarnation in connreq. |
| * b) V2 will provide incarnation while rejecting me, |
| * -1 will be overwrote. |
| * |
| * if I try to connect to a V1 peer with V2 protocol, |
| * it rejected me then upgrade to V2, I have no idea |
| * about the upgrading and try to reconnect with V1, |
| * in this case upgraded V2 can find out I'm trying to |
| * talk to the old guy and reject me(incarnation is -1). |
| */ |
| |
| if (rej->ibr_magic == __swab32(IBLND_MSG_MAGIC) || |
| rej->ibr_magic == __swab32(LNET_PROTO_MAGIC)) { |
| __swab32s(&rej->ibr_magic); |
| __swab16s(&rej->ibr_version); |
| flip = 1; |
| } |
| |
| if (priv_nob >= sizeof(kib_rej_t) && |
| rej->ibr_version > IBLND_MSG_VERSION_1) { |
| /* |
| * priv_nob is always 148 in current version |
| * of OFED, so we still need to check version. |
| * (define of IB_CM_REJ_PRIVATE_DATA_SIZE) |
| */ |
| cp = &rej->ibr_cp; |
| |
| if (flip) { |
| __swab64s(&rej->ibr_incarnation); |
| __swab16s(&cp->ibcp_queue_depth); |
| __swab16s(&cp->ibcp_max_frags); |
| __swab32s(&cp->ibcp_max_msg_size); |
| } |
| |
| incarnation = rej->ibr_incarnation; |
| } |
| |
| if (rej->ibr_magic != IBLND_MSG_MAGIC && |
| rej->ibr_magic != LNET_PROTO_MAGIC) { |
| CERROR("%s rejected: consumer defined fatal error\n", |
| libcfs_nid2str(peer->ibp_nid)); |
| break; |
| } |
| |
| if (rej->ibr_version != IBLND_MSG_VERSION && |
| rej->ibr_version != IBLND_MSG_VERSION_1) { |
| CERROR("%s rejected: o2iblnd version %x error\n", |
| libcfs_nid2str(peer->ibp_nid), |
| rej->ibr_version); |
| break; |
| } |
| |
| if (rej->ibr_why == IBLND_REJECT_FATAL && |
| rej->ibr_version == IBLND_MSG_VERSION_1) { |
| CDEBUG(D_NET, "rejected by old version peer %s: %x\n", |
| libcfs_nid2str(peer->ibp_nid), rej->ibr_version); |
| |
| if (conn->ibc_version != IBLND_MSG_VERSION_1) |
| rej->ibr_why = IBLND_REJECT_CONN_UNCOMPAT; |
| } |
| |
| switch (rej->ibr_why) { |
| case IBLND_REJECT_CONN_RACE: |
| case IBLND_REJECT_CONN_STALE: |
| case IBLND_REJECT_CONN_UNCOMPAT: |
| case IBLND_REJECT_MSG_QUEUE_SIZE: |
| case IBLND_REJECT_RDMA_FRAGS: |
| kiblnd_reconnect(conn, rej->ibr_version, |
| incarnation, rej->ibr_why, cp); |
| break; |
| |
| case IBLND_REJECT_NO_RESOURCES: |
| CERROR("%s rejected: o2iblnd no resources\n", |
| libcfs_nid2str(peer->ibp_nid)); |
| break; |
| |
| case IBLND_REJECT_FATAL: |
| CERROR("%s rejected: o2iblnd fatal error\n", |
| libcfs_nid2str(peer->ibp_nid)); |
| break; |
| |
| default: |
| CERROR("%s rejected: o2iblnd reason %d\n", |
| libcfs_nid2str(peer->ibp_nid), |
| rej->ibr_why); |
| break; |
| } |
| break; |
| } |
| /* fall through */ |
| default: |
| CNETERR("%s rejected: reason %d, size %d\n", |
| libcfs_nid2str(peer->ibp_nid), reason, priv_nob); |
| break; |
| } |
| |
| kiblnd_connreq_done(conn, -ECONNREFUSED); |
| } |
| |
| static void |
| kiblnd_check_connreply(kib_conn_t *conn, void *priv, int priv_nob) |
| { |
| kib_peer_t *peer = conn->ibc_peer; |
| lnet_ni_t *ni = peer->ibp_ni; |
| kib_net_t *net = ni->ni_data; |
| kib_msg_t *msg = priv; |
| int ver = conn->ibc_version; |
| int rc = kiblnd_unpack_msg(msg, priv_nob); |
| unsigned long flags; |
| |
| LASSERT(net); |
| |
| if (rc) { |
| CERROR("Can't unpack connack from %s: %d\n", |
| libcfs_nid2str(peer->ibp_nid), rc); |
| goto failed; |
| } |
| |
| if (msg->ibm_type != IBLND_MSG_CONNACK) { |
| CERROR("Unexpected message %d from %s\n", |
| msg->ibm_type, libcfs_nid2str(peer->ibp_nid)); |
| rc = -EPROTO; |
| goto failed; |
| } |
| |
| if (ver != msg->ibm_version) { |
| CERROR("%s replied version %x is different with requested version %x\n", |
| libcfs_nid2str(peer->ibp_nid), msg->ibm_version, ver); |
| rc = -EPROTO; |
| goto failed; |
| } |
| |
| if (msg->ibm_u.connparams.ibcp_queue_depth > |
| conn->ibc_queue_depth) { |
| CERROR("%s has incompatible queue depth %d (<=%d wanted)\n", |
| libcfs_nid2str(peer->ibp_nid), |
| msg->ibm_u.connparams.ibcp_queue_depth, |
| conn->ibc_queue_depth); |
| rc = -EPROTO; |
| goto failed; |
| } |
| |
| if (msg->ibm_u.connparams.ibcp_max_frags > |
| conn->ibc_max_frags) { |
| CERROR("%s has incompatible max_frags %d (<=%d wanted)\n", |
| libcfs_nid2str(peer->ibp_nid), |
| msg->ibm_u.connparams.ibcp_max_frags, |
| conn->ibc_max_frags); |
| rc = -EPROTO; |
| goto failed; |
| } |
| |
| if (msg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) { |
| CERROR("%s max message size %d too big (%d max)\n", |
| libcfs_nid2str(peer->ibp_nid), |
| msg->ibm_u.connparams.ibcp_max_msg_size, |
| IBLND_MSG_SIZE); |
| rc = -EPROTO; |
| goto failed; |
| } |
| |
| read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| if (msg->ibm_dstnid == ni->ni_nid && |
| msg->ibm_dststamp == net->ibn_incarnation) |
| rc = 0; |
| else |
| rc = -ESTALE; |
| read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| if (rc) { |
| CERROR("Bad connection reply from %s, rc = %d, version: %x max_frags: %d\n", |
| libcfs_nid2str(peer->ibp_nid), rc, |
| msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags); |
| goto failed; |
| } |
| |
| conn->ibc_incarnation = msg->ibm_srcstamp; |
| conn->ibc_credits = msg->ibm_u.connparams.ibcp_queue_depth; |
| conn->ibc_reserved_credits = msg->ibm_u.connparams.ibcp_queue_depth; |
| conn->ibc_queue_depth = msg->ibm_u.connparams.ibcp_queue_depth; |
| conn->ibc_max_frags = msg->ibm_u.connparams.ibcp_max_frags; |
| LASSERT(conn->ibc_credits + conn->ibc_reserved_credits + |
| IBLND_OOB_MSGS(ver) <= IBLND_RX_MSGS(conn)); |
| |
| kiblnd_connreq_done(conn, 0); |
| return; |
| |
| failed: |
| /* |
| * NB My QP has already established itself, so I handle anything going |
| * wrong here by setting ibc_comms_error. |
| * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then |
| * immediately tears it down. |
| */ |
| LASSERT(rc); |
| conn->ibc_comms_error = rc; |
| kiblnd_connreq_done(conn, 0); |
| } |
| |
| static int |
| kiblnd_active_connect(struct rdma_cm_id *cmid) |
| { |
| kib_peer_t *peer = (kib_peer_t *)cmid->context; |
| kib_conn_t *conn; |
| kib_msg_t *msg; |
| struct rdma_conn_param cp; |
| int version; |
| __u64 incarnation; |
| unsigned long flags; |
| int rc; |
| |
| read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| |
| incarnation = peer->ibp_incarnation; |
| version = !peer->ibp_version ? IBLND_MSG_VERSION : |
| peer->ibp_version; |
| |
| read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT, |
| version); |
| if (!conn) { |
| kiblnd_peer_connect_failed(peer, 1, -ENOMEM); |
| kiblnd_peer_decref(peer); /* lose cmid's ref */ |
| return -ENOMEM; |
| } |
| |
| /* |
| * conn "owns" cmid now, so I return success from here on to ensure the |
| * CM callback doesn't destroy cmid. conn also takes over cmid's ref |
| * on peer |
| */ |
| msg = &conn->ibc_connvars->cv_msg; |
| |
| memset(msg, 0, sizeof(*msg)); |
| kiblnd_init_msg(msg, IBLND_MSG_CONNREQ, sizeof(msg->ibm_u.connparams)); |
| msg->ibm_u.connparams.ibcp_queue_depth = conn->ibc_queue_depth; |
| msg->ibm_u.connparams.ibcp_max_frags = conn->ibc_max_frags; |
| msg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE; |
| |
| kiblnd_pack_msg(peer->ibp_ni, msg, version, |
| 0, peer->ibp_nid, incarnation); |
| |
| memset(&cp, 0, sizeof(cp)); |
| cp.private_data = msg; |
| cp.private_data_len = msg->ibm_nob; |
| cp.responder_resources = 0; /* No atomic ops or RDMA reads */ |
| cp.initiator_depth = 0; |
| cp.flow_control = 1; |
| cp.retry_count = *kiblnd_tunables.kib_retry_count; |
| cp.rnr_retry_count = *kiblnd_tunables.kib_rnr_retry_count; |
| |
| LASSERT(cmid->context == (void *)conn); |
| LASSERT(conn->ibc_cmid == cmid); |
| |
| rc = rdma_connect(cmid, &cp); |
| if (rc) { |
| CERROR("Can't connect to %s: %d\n", |
| libcfs_nid2str(peer->ibp_nid), rc); |
| kiblnd_connreq_done(conn, rc); |
| kiblnd_conn_decref(conn); |
| } |
| |
| return 0; |
| } |
| |
| int |
| kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) |
| { |
| kib_peer_t *peer; |
| kib_conn_t *conn; |
| int rc; |
| |
| switch (event->event) { |
| default: |
| CERROR("Unexpected event: %d, status: %d\n", |
| event->event, event->status); |
| LBUG(); |
| |
| case RDMA_CM_EVENT_CONNECT_REQUEST: |
| /* destroy cmid on failure */ |
| rc = kiblnd_passive_connect(cmid, |
| (void *)KIBLND_CONN_PARAM(event), |
| KIBLND_CONN_PARAM_LEN(event)); |
| CDEBUG(D_NET, "connreq: %d\n", rc); |
| return rc; |
| |
| case RDMA_CM_EVENT_ADDR_ERROR: |
| peer = (kib_peer_t *)cmid->context; |
| CNETERR("%s: ADDR ERROR %d\n", |
| libcfs_nid2str(peer->ibp_nid), event->status); |
| kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH); |
| kiblnd_peer_decref(peer); |
| return -EHOSTUNREACH; /* rc destroys cmid */ |
| |
| case RDMA_CM_EVENT_ADDR_RESOLVED: |
| peer = (kib_peer_t *)cmid->context; |
| |
| CDEBUG(D_NET, "%s Addr resolved: %d\n", |
| libcfs_nid2str(peer->ibp_nid), event->status); |
| |
| if (event->status) { |
| CNETERR("Can't resolve address for %s: %d\n", |
| libcfs_nid2str(peer->ibp_nid), event->status); |
| rc = event->status; |
| } else { |
| rc = rdma_resolve_route( |
| cmid, *kiblnd_tunables.kib_timeout * 1000); |
| if (!rc) |
| return 0; |
| /* Can't initiate route resolution */ |
| CERROR("Can't resolve route for %s: %d\n", |
| libcfs_nid2str(peer->ibp_nid), rc); |
| } |
| kiblnd_peer_connect_failed(peer, 1, rc); |
| kiblnd_peer_decref(peer); |
| return rc; /* rc destroys cmid */ |
| |
| case RDMA_CM_EVENT_ROUTE_ERROR: |
| peer = (kib_peer_t *)cmid->context; |
| CNETERR("%s: ROUTE ERROR %d\n", |
| libcfs_nid2str(peer->ibp_nid), event->status); |
| kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH); |
| kiblnd_peer_decref(peer); |
| return -EHOSTUNREACH; /* rc destroys cmid */ |
| |
| case RDMA_CM_EVENT_ROUTE_RESOLVED: |
| peer = (kib_peer_t *)cmid->context; |
| CDEBUG(D_NET, "%s Route resolved: %d\n", |
| libcfs_nid2str(peer->ibp_nid), event->status); |
| |
| if (!event->status) |
| return kiblnd_active_connect(cmid); |
| |
| CNETERR("Can't resolve route for %s: %d\n", |
| libcfs_nid2str(peer->ibp_nid), event->status); |
| kiblnd_peer_connect_failed(peer, 1, event->status); |
| kiblnd_peer_decref(peer); |
| return event->status; /* rc destroys cmid */ |
| |
| case RDMA_CM_EVENT_UNREACHABLE: |
| conn = (kib_conn_t *)cmid->context; |
| LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || |
| conn->ibc_state == IBLND_CONN_PASSIVE_WAIT); |
| CNETERR("%s: UNREACHABLE %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status); |
| kiblnd_connreq_done(conn, -ENETDOWN); |
| kiblnd_conn_decref(conn); |
| return 0; |
| |
| case RDMA_CM_EVENT_CONNECT_ERROR: |
| conn = (kib_conn_t *)cmid->context; |
| LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || |
| conn->ibc_state == IBLND_CONN_PASSIVE_WAIT); |
| CNETERR("%s: CONNECT ERROR %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status); |
| kiblnd_connreq_done(conn, -ENOTCONN); |
| kiblnd_conn_decref(conn); |
| return 0; |
| |
| case RDMA_CM_EVENT_REJECTED: |
| conn = (kib_conn_t *)cmid->context; |
| switch (conn->ibc_state) { |
| default: |
| LBUG(); |
| |
| case IBLND_CONN_PASSIVE_WAIT: |
| CERROR("%s: REJECTED %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| event->status); |
| kiblnd_connreq_done(conn, -ECONNRESET); |
| break; |
| |
| case IBLND_CONN_ACTIVE_CONNECT: |
| kiblnd_rejected(conn, event->status, |
| (void *)KIBLND_CONN_PARAM(event), |
| KIBLND_CONN_PARAM_LEN(event)); |
| break; |
| } |
| kiblnd_conn_decref(conn); |
| return 0; |
| |
| case RDMA_CM_EVENT_ESTABLISHED: |
| conn = (kib_conn_t *)cmid->context; |
| switch (conn->ibc_state) { |
| default: |
| LBUG(); |
| |
| case IBLND_CONN_PASSIVE_WAIT: |
| CDEBUG(D_NET, "ESTABLISHED (passive): %s\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| kiblnd_connreq_done(conn, 0); |
| break; |
| |
| case IBLND_CONN_ACTIVE_CONNECT: |
| CDEBUG(D_NET, "ESTABLISHED(active): %s\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| kiblnd_check_connreply(conn, |
| (void *)KIBLND_CONN_PARAM(event), |
| KIBLND_CONN_PARAM_LEN(event)); |
| break; |
| } |
| /* net keeps its ref on conn! */ |
| return 0; |
| |
| case RDMA_CM_EVENT_TIMEWAIT_EXIT: |
| CDEBUG(D_NET, "Ignore TIMEWAIT_EXIT event\n"); |
| return 0; |
| case RDMA_CM_EVENT_DISCONNECTED: |
| conn = (kib_conn_t *)cmid->context; |
| if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { |
| CERROR("%s DISCONNECTED\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| kiblnd_connreq_done(conn, -ECONNRESET); |
| } else { |
| kiblnd_close_conn(conn, 0); |
| } |
| kiblnd_conn_decref(conn); |
| cmid->context = NULL; |
| return 0; |
| |
| case RDMA_CM_EVENT_DEVICE_REMOVAL: |
| LCONSOLE_ERROR_MSG(0x131, |
| "Received notification of device removal\n" |
| "Please shutdown LNET to allow this to proceed\n"); |
| /* |
| * Can't remove network from underneath LNET for now, so I have |
| * to ignore this |
| */ |
| return 0; |
| |
| case RDMA_CM_EVENT_ADDR_CHANGE: |
| LCONSOLE_INFO("Physical link changed (eg hca/port)\n"); |
| return 0; |
| } |
| } |
| |
| static int |
| kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs) |
| { |
| kib_tx_t *tx; |
| struct list_head *ttmp; |
| |
| list_for_each(ttmp, txs) { |
| tx = list_entry(ttmp, kib_tx_t, tx_list); |
| |
| if (txs != &conn->ibc_active_txs) { |
| LASSERT(tx->tx_queued); |
| } else { |
| LASSERT(!tx->tx_queued); |
| LASSERT(tx->tx_waiting || tx->tx_sending); |
| } |
| |
| if (cfs_time_aftereq(jiffies, tx->tx_deadline)) { |
| CERROR("Timed out tx: %s, %lu seconds\n", |
| kiblnd_queue2str(conn, txs), |
| cfs_duration_sec(jiffies - tx->tx_deadline)); |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int |
| kiblnd_conn_timed_out_locked(kib_conn_t *conn) |
| { |
| return kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue) || |
| kiblnd_check_txs_locked(conn, &conn->ibc_tx_noops) || |
| kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_rsrvd) || |
| kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue_nocred) || |
| kiblnd_check_txs_locked(conn, &conn->ibc_active_txs); |
| } |
| |
| static void |
| kiblnd_check_conns(int idx) |
| { |
| LIST_HEAD(closes); |
| LIST_HEAD(checksends); |
| struct list_head *peers = &kiblnd_data.kib_peers[idx]; |
| struct list_head *ptmp; |
| kib_peer_t *peer; |
| kib_conn_t *conn; |
| kib_conn_t *tmp; |
| struct list_head *ctmp; |
| unsigned long flags; |
| |
| /* |
| * NB. We expect to have a look at all the peers and not find any |
| * RDMAs to time out, so we just use a shared lock while we |
| * take a look... |
| */ |
| read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); |
| |
| list_for_each(ptmp, peers) { |
| peer = list_entry(ptmp, kib_peer_t, ibp_list); |
| |
| list_for_each(ctmp, &peer->ibp_conns) { |
| int timedout; |
| int sendnoop; |
| |
| conn = list_entry(ctmp, kib_conn_t, ibc_list); |
| |
| LASSERT(conn->ibc_state == IBLND_CONN_ESTABLISHED); |
| |
| spin_lock(&conn->ibc_lock); |
| |
| sendnoop = kiblnd_need_noop(conn); |
| timedout = kiblnd_conn_timed_out_locked(conn); |
| if (!sendnoop && !timedout) { |
| spin_unlock(&conn->ibc_lock); |
| continue; |
| } |
| |
| if (timedout) { |
| CERROR("Timed out RDMA with %s (%lu): c: %u, oc: %u, rc: %u\n", |
| libcfs_nid2str(peer->ibp_nid), |
| cfs_duration_sec(cfs_time_current() - |
| peer->ibp_last_alive), |
| conn->ibc_credits, |
| conn->ibc_outstanding_credits, |
| conn->ibc_reserved_credits); |
| list_add(&conn->ibc_connd_list, &closes); |
| } else { |
| list_add(&conn->ibc_connd_list, &checksends); |
| } |
| /* +ref for 'closes' or 'checksends' */ |
| kiblnd_conn_addref(conn); |
| |
| spin_unlock(&conn->ibc_lock); |
| } |
| } |
| |
| read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); |
| |
| /* |
| * Handle timeout by closing the whole |
| * connection. We can only be sure RDMA activity |
| * has ceased once the QP has been modified. |
| */ |
| list_for_each_entry_safe(conn, tmp, &closes, ibc_connd_list) { |
| list_del(&conn->ibc_connd_list); |
| kiblnd_close_conn(conn, -ETIMEDOUT); |
| kiblnd_conn_decref(conn); |
| } |
| |
| /* |
| * In case we have enough credits to return via a |
| * NOOP, but there were no non-blocking tx descs |
| * free to do it last time... |
| */ |
| while (!list_empty(&checksends)) { |
| conn = list_entry(checksends.next, kib_conn_t, ibc_connd_list); |
| list_del(&conn->ibc_connd_list); |
| kiblnd_check_sends(conn); |
| kiblnd_conn_decref(conn); |
| } |
| } |
| |
| static void |
| kiblnd_disconnect_conn(kib_conn_t *conn) |
| { |
| LASSERT(!in_interrupt()); |
| LASSERT(current == kiblnd_data.kib_connd); |
| LASSERT(conn->ibc_state == IBLND_CONN_CLOSING); |
| |
| rdma_disconnect(conn->ibc_cmid); |
| kiblnd_finalise_conn(conn); |
| |
| kiblnd_peer_notify(conn->ibc_peer); |
| } |
| |
| int |
| kiblnd_connd(void *arg) |
| { |
| wait_queue_t wait; |
| unsigned long flags; |
| kib_conn_t *conn; |
| int timeout; |
| int i; |
| int dropped_lock; |
| int peer_index = 0; |
| unsigned long deadline = jiffies; |
| |
| cfs_block_allsigs(); |
| |
| init_waitqueue_entry(&wait, current); |
| kiblnd_data.kib_connd = current; |
| |
| spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| |
| while (!kiblnd_data.kib_shutdown) { |
| dropped_lock = 0; |
| |
| if (!list_empty(&kiblnd_data.kib_connd_zombies)) { |
| conn = list_entry(kiblnd_data.kib_connd_zombies.next, |
| kib_conn_t, ibc_list); |
| list_del(&conn->ibc_list); |
| |
| spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, |
| flags); |
| dropped_lock = 1; |
| |
| kiblnd_destroy_conn(conn); |
| |
| spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| } |
| |
| if (!list_empty(&kiblnd_data.kib_connd_conns)) { |
| conn = list_entry(kiblnd_data.kib_connd_conns.next, |
| kib_conn_t, ibc_list); |
| list_del(&conn->ibc_list); |
| |
| spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, |
| flags); |
| dropped_lock = 1; |
| |
| kiblnd_disconnect_conn(conn); |
| kiblnd_conn_decref(conn); |
| |
| spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| } |
| |
| /* careful with the jiffy wrap... */ |
| timeout = (int)(deadline - jiffies); |
| if (timeout <= 0) { |
| const int n = 4; |
| const int p = 1; |
| int chunk = kiblnd_data.kib_peer_hash_size; |
| |
| spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); |
| dropped_lock = 1; |
| |
| /* |
| * Time to check for RDMA timeouts on a few more |
| * peers: I do checks every 'p' seconds on a |
| * proportion of the peer table and I need to check |
| * every connection 'n' times within a timeout |
| * interval, to ensure I detect a timeout on any |
| * connection within (n+1)/n times the timeout |
| * interval. |
| */ |
| if (*kiblnd_tunables.kib_timeout > n * p) |
| chunk = (chunk * n * p) / |
| *kiblnd_tunables.kib_timeout; |
| if (!chunk) |
| chunk = 1; |
| |
| for (i = 0; i < chunk; i++) { |
| kiblnd_check_conns(peer_index); |
| peer_index = (peer_index + 1) % |
| kiblnd_data.kib_peer_hash_size; |
| } |
| |
| deadline += msecs_to_jiffies(p * MSEC_PER_SEC); |
| spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| } |
| |
| if (dropped_lock) |
| continue; |
| |
| /* Nothing to do for 'timeout' */ |
| set_current_state(TASK_INTERRUPTIBLE); |
| add_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); |
| spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); |
| |
| schedule_timeout(timeout); |
| |
| remove_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); |
| spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); |
| } |
| |
| spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); |
| |
| kiblnd_thread_fini(); |
| return 0; |
| } |
| |
| void |
| kiblnd_qp_event(struct ib_event *event, void *arg) |
| { |
| kib_conn_t *conn = arg; |
| |
| switch (event->event) { |
| case IB_EVENT_COMM_EST: |
| CDEBUG(D_NET, "%s established\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid)); |
| return; |
| |
| default: |
| CERROR("%s: Async QP event type %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); |
| return; |
| } |
| } |
| |
| static void |
| kiblnd_complete(struct ib_wc *wc) |
| { |
| switch (kiblnd_wreqid2type(wc->wr_id)) { |
| default: |
| LBUG(); |
| |
| case IBLND_WID_RDMA: |
| /* |
| * We only get RDMA completion notification if it fails. All |
| * subsequent work items, including the final SEND will fail |
| * too. However we can't print out any more info about the |
| * failing RDMA because 'tx' might be back on the idle list or |
| * even reused already if we didn't manage to post all our work |
| * items |
| */ |
| CNETERR("RDMA (tx: %p) failed: %d\n", |
| kiblnd_wreqid2ptr(wc->wr_id), wc->status); |
| return; |
| |
| case IBLND_WID_TX: |
| kiblnd_tx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status); |
| return; |
| |
| case IBLND_WID_RX: |
| kiblnd_rx_complete(kiblnd_wreqid2ptr(wc->wr_id), wc->status, |
| wc->byte_len); |
| return; |
| } |
| } |
| |
| void |
| kiblnd_cq_completion(struct ib_cq *cq, void *arg) |
| { |
| /* |
| * NB I'm not allowed to schedule this conn once its refcount has |
| * reached 0. Since fundamentally I'm racing with scheduler threads |
| * consuming my CQ I could be called after all completions have |
| * occurred. But in this case, !ibc_nrx && !ibc_nsends_posted |
| * and this CQ is about to be destroyed so I NOOP. |
| */ |
| kib_conn_t *conn = arg; |
| struct kib_sched_info *sched = conn->ibc_sched; |
| unsigned long flags; |
| |
| LASSERT(cq == conn->ibc_cq); |
| |
| spin_lock_irqsave(&sched->ibs_lock, flags); |
| |
| conn->ibc_ready = 1; |
| |
| if (!conn->ibc_scheduled && |
| (conn->ibc_nrx > 0 || |
| conn->ibc_nsends_posted > 0)) { |
| kiblnd_conn_addref(conn); /* +1 ref for sched_conns */ |
| conn->ibc_scheduled = 1; |
| list_add_tail(&conn->ibc_sched_list, &sched->ibs_conns); |
| |
| if (waitqueue_active(&sched->ibs_waitq)) |
| wake_up(&sched->ibs_waitq); |
| } |
| |
| spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| } |
| |
| void |
| kiblnd_cq_event(struct ib_event *event, void *arg) |
| { |
| kib_conn_t *conn = arg; |
| |
| CERROR("%s: async CQ event type %d\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); |
| } |
| |
| int |
| kiblnd_scheduler(void *arg) |
| { |
| long id = (long)arg; |
| struct kib_sched_info *sched; |
| kib_conn_t *conn; |
| wait_queue_t wait; |
| unsigned long flags; |
| struct ib_wc wc; |
| int did_something; |
| int busy_loops = 0; |
| int rc; |
| |
| cfs_block_allsigs(); |
| |
| init_waitqueue_entry(&wait, current); |
| |
| sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)]; |
| |
| rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt); |
| if (rc) { |
| CWARN("Failed to bind on CPT %d, please verify whether all CPUs are healthy and reload modules if necessary, otherwise your system might under risk of low performance\n", |
| sched->ibs_cpt); |
| } |
| |
| spin_lock_irqsave(&sched->ibs_lock, flags); |
| |
| while (!kiblnd_data.kib_shutdown) { |
| if (busy_loops++ >= IBLND_RESCHED) { |
| spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| |
| cond_resched(); |
| busy_loops = 0; |
| |
| spin_lock_irqsave(&sched->ibs_lock, flags); |
| } |
| |
| did_something = 0; |
| |
| if (!list_empty(&sched->ibs_conns)) { |
| conn = list_entry(sched->ibs_conns.next, kib_conn_t, |
| ibc_sched_list); |
| /* take over kib_sched_conns' ref on conn... */ |
| LASSERT(conn->ibc_scheduled); |
| list_del(&conn->ibc_sched_list); |
| conn->ibc_ready = 0; |
| |
| spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| |
| wc.wr_id = IBLND_WID_INVAL; |
| |
| rc = ib_poll_cq(conn->ibc_cq, 1, &wc); |
| if (!rc) { |
| rc = ib_req_notify_cq(conn->ibc_cq, |
| IB_CQ_NEXT_COMP); |
| if (rc < 0) { |
| CWARN("%s: ib_req_notify_cq failed: %d, closing connection\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), rc); |
| kiblnd_close_conn(conn, -EIO); |
| kiblnd_conn_decref(conn); |
| spin_lock_irqsave(&sched->ibs_lock, |
| flags); |
| continue; |
| } |
| |
| rc = ib_poll_cq(conn->ibc_cq, 1, &wc); |
| } |
| |
| if (unlikely(rc > 0 && wc.wr_id == IBLND_WID_INVAL)) { |
| LCONSOLE_ERROR("ib_poll_cq (rc: %d) returned invalid wr_id, opcode %d, status: %d, vendor_err: %d, conn: %s status: %d\nplease upgrade firmware and OFED or contact vendor.\n", |
| rc, wc.opcode, wc.status, |
| wc.vendor_err, |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| conn->ibc_state); |
| rc = -EINVAL; |
| } |
| |
| if (rc < 0) { |
| CWARN("%s: ib_poll_cq failed: %d, closing connection\n", |
| libcfs_nid2str(conn->ibc_peer->ibp_nid), |
| rc); |
| kiblnd_close_conn(conn, -EIO); |
| kiblnd_conn_decref(conn); |
| spin_lock_irqsave(&sched->ibs_lock, flags); |
| continue; |
| } |
| |
| spin_lock_irqsave(&sched->ibs_lock, flags); |
| |
| if (rc || conn->ibc_ready) { |
| /* |
| * There may be another completion waiting; get |
| * another scheduler to check while I handle |
| * this one... |
| */ |
| /* +1 ref for sched_conns */ |
| kiblnd_conn_addref(conn); |
| list_add_tail(&conn->ibc_sched_list, |
| &sched->ibs_conns); |
| if (waitqueue_active(&sched->ibs_waitq)) |
| wake_up(&sched->ibs_waitq); |
| } else { |
| conn->ibc_scheduled = 0; |
| } |
| |
| if (rc) { |
| spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| kiblnd_complete(&wc); |
| |
| spin_lock_irqsave(&sched->ibs_lock, flags); |
| } |
| |
| kiblnd_conn_decref(conn); /* ...drop my ref from above */ |
| did_something = 1; |
| } |
| |
| if (did_something) |
| continue; |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| add_wait_queue_exclusive(&sched->ibs_waitq, &wait); |
| spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| |
| schedule(); |
| busy_loops = 0; |
| |
| remove_wait_queue(&sched->ibs_waitq, &wait); |
| spin_lock_irqsave(&sched->ibs_lock, flags); |
| } |
| |
| spin_unlock_irqrestore(&sched->ibs_lock, flags); |
| |
| kiblnd_thread_fini(); |
| return 0; |
| } |
| |
| int |
| kiblnd_failover_thread(void *arg) |
| { |
| rwlock_t *glock = &kiblnd_data.kib_global_lock; |
| kib_dev_t *dev; |
| wait_queue_t wait; |
| unsigned long flags; |
| int rc; |
| |
| LASSERT(*kiblnd_tunables.kib_dev_failover); |
| |
| cfs_block_allsigs(); |
| |
| init_waitqueue_entry(&wait, current); |
| write_lock_irqsave(glock, flags); |
| |
| while (!kiblnd_data.kib_shutdown) { |
| int do_failover = 0; |
| int long_sleep; |
| |
| list_for_each_entry(dev, &kiblnd_data.kib_failed_devs, |
| ibd_fail_list) { |
| if (time_before(cfs_time_current(), |
| dev->ibd_next_failover)) |
| continue; |
| do_failover = 1; |
| break; |
| } |
| |
| if (do_failover) { |
| list_del_init(&dev->ibd_fail_list); |
| dev->ibd_failover = 1; |
| write_unlock_irqrestore(glock, flags); |
| |
| rc = kiblnd_dev_failover(dev); |
| |
| write_lock_irqsave(glock, flags); |
| |
| LASSERT(dev->ibd_failover); |
| dev->ibd_failover = 0; |
| if (rc >= 0) { /* Device is OK or failover succeed */ |
| dev->ibd_next_failover = cfs_time_shift(3); |
| continue; |
| } |
| |
| /* failed to failover, retry later */ |
| dev->ibd_next_failover = |
| cfs_time_shift(min(dev->ibd_failed_failover, 10)); |
| if (kiblnd_dev_can_failover(dev)) { |
| list_add_tail(&dev->ibd_fail_list, |
| &kiblnd_data.kib_failed_devs); |
| } |
| |
| continue; |
| } |
| |
| /* long sleep if no more pending failover */ |
| long_sleep = list_empty(&kiblnd_data.kib_failed_devs); |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| add_wait_queue(&kiblnd_data.kib_failover_waitq, &wait); |
| write_unlock_irqrestore(glock, flags); |
| |
| rc = schedule_timeout(long_sleep ? cfs_time_seconds(10) : |
| cfs_time_seconds(1)); |
| remove_wait_queue(&kiblnd_data.kib_failover_waitq, &wait); |
| write_lock_irqsave(glock, flags); |
| |
| if (!long_sleep || rc) |
| continue; |
| |
| /* |
| * have a long sleep, routine check all active devices, |
| * we need checking like this because if there is not active |
| * connection on the dev and no SEND from local, we may listen |
| * on wrong HCA for ever while there is a bonding failover |
| */ |
| list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) { |
| if (kiblnd_dev_can_failover(dev)) { |
| list_add_tail(&dev->ibd_fail_list, |
| &kiblnd_data.kib_failed_devs); |
| } |
| } |
| } |
| |
| write_unlock_irqrestore(glock, flags); |
| |
| kiblnd_thread_fini(); |
| return 0; |
| } |