X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lnet%2Fklnds%2Fo2iblnd%2Fo2iblnd_cb.c;h=658d0adde546e5fbb9e9da7c9fc455e6165f75c9;hp=5ba9d244c38c6bb38b2c2156c3c960a7bff757bf;hb=HEAD;hpb=f2600449ced3a2f78c4b3e650ff29bb88d1e7e45 diff --git a/lnet/klnds/o2iblnd/o2iblnd_cb.c b/lnet/klnds/o2iblnd/o2iblnd_cb.c index 5ba9d24..5c58a5c 100644 --- a/lnet/klnds/o2iblnd/o2iblnd_cb.c +++ b/lnet/klnds/o2iblnd/o2iblnd_cb.c @@ -15,11 +15,7 @@ * * 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. + * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ @@ -27,11 +23,10 @@ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * - * Copyright (c) 2012, 2015, Intel Corporation. + * Copyright (c) 2012, 2017, 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 * @@ -40,33 +35,38 @@ #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); +#define MAX_CONN_RACES_BEFORE_ABORT 20 + +static void kiblnd_peer_alive(struct kib_peer_ni *peer_ni); +static void kiblnd_peer_connect_failed(struct kib_peer_ni *peer_ni, int active, + int error); +static struct ib_rdma_wr * +kiblnd_init_tx_msg_payload(struct lnet_ni *ni, struct kib_tx *tx, + int type, int body_nob, int payload_nob); +#define kiblnd_init_tx_msg(ni, tx, type, body) \ + kiblnd_init_tx_msg_payload(ni, tx, type, body, 0) +static int kiblnd_init_rdma(struct kib_conn *conn, struct kib_tx *tx, int type, + int resid, struct kib_rdma_desc *dstrd, u64 dstcookie); +static void kiblnd_queue_tx_locked(struct kib_tx *tx, struct kib_conn *conn); +static void kiblnd_queue_tx(struct kib_tx *tx, struct kib_conn *conn); + +static void kiblnd_unmap_tx(struct kib_tx *tx); +static void kiblnd_check_sends_locked(struct kib_conn *conn); static void -kiblnd_tx_done (lnet_ni_t *ni, kib_tx_t *tx) +kiblnd_tx_done(struct kib_tx *tx) { - lnet_msg_t *lntmsg[2]; - kib_net_t *net = ni->ni_data; + struct lnet_msg *lntmsg[2]; int rc; int i; - LASSERT (net != NULL); LASSERT (!in_interrupt()); LASSERT (!tx->tx_queued); /* mustn't be queued for sending */ LASSERT (tx->tx_sending == 0); /* mustn't be awaiting sent callback */ - LASSERT (!tx->tx_waiting); /* mustn't be awaiting peer response */ + LASSERT (!tx->tx_waiting); /* mustn't be awaiting peer_ni response */ LASSERT (tx->tx_pool != NULL); - kiblnd_unmap_tx(ni, tx); + kiblnd_unmap_tx(tx); /* tx may have up to 2 lnet msgs to finalise */ lntmsg[0] = tx->tx_lntmsg[0]; tx->tx_lntmsg[0] = NULL; @@ -74,13 +74,11 @@ kiblnd_tx_done (lnet_ni_t *ni, kib_tx_t *tx) rc = tx->tx_status; if (tx->tx_conn != NULL) { - 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_nwrq = tx->tx_nsge = 0; tx->tx_status = 0; kiblnd_pool_free_node(&tx->tx_pool->tpo_pool, &tx->tx_list); @@ -90,39 +88,46 @@ kiblnd_tx_done (lnet_ni_t *ni, kib_tx_t *tx) if (lntmsg[i] == NULL) continue; - lnet_finalize(ni, lntmsg[i], rc); + /* propagate health status to LNet for requests */ + if (i == 0 && lntmsg[i]) + lntmsg[i]->msg_health_status = tx->tx_hstatus; + + lnet_finalize(lntmsg[i], rc); } } void -kiblnd_txlist_done(lnet_ni_t *ni, struct list_head *txlist, int status) +kiblnd_txlist_done(struct list_head *txlist, int status, + enum lnet_msg_hstatus hstatus) { - kib_tx_t *tx; - - while (!list_empty(txlist)) { - tx = list_entry(txlist->next, kib_tx_t, tx_list); + struct kib_tx *tx; + while ((tx = list_first_entry_or_null(txlist, + struct kib_tx, + tx_list)) != NULL) { list_del(&tx->tx_list); /* complete now */ tx->tx_waiting = 0; tx->tx_status = status; - kiblnd_tx_done(ni, tx); + if (hstatus != LNET_MSG_STATUS_OK) + tx->tx_hstatus = hstatus; + kiblnd_tx_done(tx); } } -static kib_tx_t * -kiblnd_get_idle_tx(lnet_ni_t *ni, lnet_nid_t target) +static struct kib_tx * +kiblnd_get_idle_tx(struct lnet_ni *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; + struct kib_net *net = ni->ni_data; + struct list_head *node; + struct kib_tx *tx; + struct kib_tx_poolset *tps; - tps = net->ibn_tx_ps[lnet_cpt_of_nid(target)]; + tps = net->ibn_tx_ps[lnet_cpt_of_nid(target, ni)]; node = kiblnd_pool_alloc_node(&tps->tps_poolset); if (node == NULL) return NULL; - tx = container_of(node, kib_tx_t, tx_list); + tx = container_of(node, struct kib_tx, tx_list); LASSERT (tx->tx_nwrq == 0); LASSERT (!tx->tx_queued); @@ -134,15 +139,19 @@ kiblnd_get_idle_tx(lnet_ni_t *ni, lnet_nid_t target) LASSERT (tx->tx_lntmsg[1] == NULL); LASSERT (tx->tx_nfrags == 0); + tx->tx_gpu = 0; + tx->tx_gaps = false; + tx->tx_hstatus = LNET_MSG_STATUS_OK; + return tx; } static void -kiblnd_drop_rx(kib_rx_t *rx) +kiblnd_drop_rx(struct kib_rx *rx) { - kib_conn_t *conn = rx->rx_conn; - struct kib_sched_info *sched = conn->ibc_sched; - unsigned long flags; + struct kib_conn *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); @@ -153,22 +162,28 @@ kiblnd_drop_rx(kib_rx_t *rx) } int -kiblnd_post_rx (kib_rx_t *rx, int credit) +kiblnd_post_rx(struct kib_rx *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; + struct kib_conn *conn = rx->rx_conn; + struct kib_net *net = conn->ibc_peer->ibp_ni->ni_data; + struct ib_recv_wr *bad_wrq = NULL; +#ifdef HAVE_OFED_IB_GET_DMA_MR + struct ib_mr *mr = conn->ibc_hdev->ibh_mrs; +#endif + int rc; LASSERT (net != NULL); LASSERT (!in_interrupt()); LASSERT (credit == IBLND_POSTRX_NO_CREDIT || credit == IBLND_POSTRX_PEER_CREDIT || credit == IBLND_POSTRX_RSRVD_CREDIT); +#ifdef HAVE_OFED_IB_GET_DMA_MR LASSERT(mr != NULL); - rx->rx_sge.lkey = mr->lkey; + rx->rx_sge.lkey = mr->lkey; +#else + rx->rx_sge.lkey = conn->ibc_hdev->ibh_pd->local_dma_lkey; +#endif rx->rx_sge.addr = rx->rx_msgaddr; rx->rx_sge.length = IBLND_MSG_SIZE; @@ -191,7 +206,12 @@ kiblnd_post_rx (kib_rx_t *rx, int credit) * own this rx (and rx::rx_conn) anymore, LU-5678. */ kiblnd_conn_addref(conn); +#ifdef HAVE_OFED_IB_POST_SEND_RECV_CONST + rc = ib_post_recv(conn->ibc_cmid->qp, &rx->rx_wrq, + (const struct ib_recv_wr **)&bad_wrq); +#else rc = ib_post_recv(conn->ibc_cmid->qp, &rx->rx_wrq, &bad_wrq); +#endif if (unlikely(rc != 0)) { CERROR("Can't post rx for %s: %d, bad_wrq: %p\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), rc, bad_wrq); @@ -215,22 +235,20 @@ kiblnd_post_rx (kib_rx_t *rx, int credit) conn->ibc_outstanding_credits++; else conn->ibc_reserved_credits++; + kiblnd_check_sends_locked(conn); 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) +static struct kib_tx * +kiblnd_find_waiting_tx_locked(struct kib_conn *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); + struct kib_tx *tx; + list_for_each_entry(tx, &conn->ibc_active_txs, tx_list) { LASSERT(!tx->tx_queued); LASSERT(tx->tx_sending != 0 || tx->tx_waiting); @@ -249,11 +267,11 @@ kiblnd_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie) } static void -kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie) +kiblnd_handle_completion(struct kib_conn *conn, int txtype, int status, u64 cookie) { - kib_tx_t *tx; - lnet_ni_t *ni = conn->ibc_peer->ibp_ni; - int idle; + struct kib_tx *tx; + struct lnet_ni *ni = conn->ibc_peer->ibp_ni; + int idle; spin_lock(&conn->ibc_lock); @@ -261,37 +279,45 @@ kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie) if (tx == NULL) { spin_unlock(&conn->ibc_lock); - CWARN("Unmatched completion type %x cookie "LPX64" from %s\n", - txtype, cookie, libcfs_nid2str(conn->ibc_peer->ibp_nid)); - kiblnd_close_conn(conn, -EPROTO); - return; - } + 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 == 0) { /* 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); - } - } + if (tx->tx_status == 0) { /* success so far */ + if (status < 0) { /* failed? */ + if (status == -ECONNABORTED) { + CDEBUG(D_NET, "bad status for connection to %s " + "with completion type %x\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), + txtype); + } - tx->tx_waiting = 0; + tx->tx_status = status; + tx->tx_hstatus = LNET_MSG_STATUS_REMOTE_ERROR; + } else if (txtype == IBLND_MSG_GET_REQ) { + lnet_set_reply_msg_len(ni, tx->tx_lntmsg[1], status); + } + } - idle = !tx->tx_queued && (tx->tx_sending == 0); - if (idle) + tx->tx_waiting = 0; + + idle = !tx->tx_queued && (tx->tx_sending == 0); + if (idle) list_del(&tx->tx_list); spin_unlock(&conn->ibc_lock); if (idle) - kiblnd_tx_done(ni, tx); + kiblnd_tx_done(tx); } static void -kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie) +kiblnd_send_completion(struct kib_conn *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); + struct lnet_ni *ni = conn->ibc_peer->ibp_ni; + struct kib_tx *tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); if (tx == NULL) { CERROR("Can't get tx for completion %x for %s\n", @@ -301,28 +327,33 @@ kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie) 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_init_tx_msg(ni, tx, type, sizeof(struct kib_completion_msg)); kiblnd_queue_tx(tx, conn); } static void -kiblnd_handle_rx (kib_rx_t *rx) +kiblnd_handle_rx(struct kib_rx *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; + struct kib_msg *msg = rx->rx_msg; + struct kib_conn *conn = rx->rx_conn; + struct lnet_ni *ni = conn->ibc_peer->ibp_ni; + int credits = msg->ibm_credits; + struct kib_tx *tx; + int rc = 0; + int rc2; + int post_credit; + struct lnet_hdr hdr; + struct lnet_nid srcnid; 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)); + CDEBUG(D_NET, "Received %x[%d] nob %u cm_id %p qp_num 0x%x\n", + msg->ibm_type, credits, + msg->ibm_nob, + conn->ibc_cmid, + conn->ibc_cmid->qp ? conn->ibc_cmid->qp->qp_num : 0); + kiblnd_dump_conn_dbg(conn); if (credits != 0) { /* Have I received credits that will let me send? */ @@ -350,8 +381,8 @@ kiblnd_handle_rx (kib_rx_t *rx) !IBLND_OOB_CAPABLE(conn->ibc_version)) /* v1 only */ conn->ibc_outstanding_credits++; + kiblnd_check_sends_locked(conn); spin_unlock(&conn->ibc_lock); - kiblnd_check_sends(conn); } switch (msg->ibm_type) { @@ -374,21 +405,23 @@ kiblnd_handle_rx (kib_rx_t *rx) 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_IMMEDIATE: + post_credit = IBLND_POSTRX_DONT_POST; + lnet_hdr_from_nid4(&hdr, &msg->ibm_u.immediate.ibim_hdr); + lnet_nid4_to_nid(msg->ibm_srcnid, &srcnid); + rc = lnet_parse(ni, &hdr, &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_REQ: + post_credit = IBLND_POSTRX_DONT_POST; + lnet_hdr_from_nid4(&hdr, &msg->ibm_u.putreq.ibprm_hdr); + lnet_nid4_to_nid(msg->ibm_srcnid, &srcnid); + rc = lnet_parse(ni, &hdr, &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", @@ -418,10 +451,10 @@ kiblnd_handle_rx (kib_rx_t *rx) 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! + * (a) I can overwrite tx_msg since my peer_ni has received it! * (b) tx_waiting set tells tx_complete() it's not done. */ - tx->tx_nwrq = 0; /* overwrite PUT_REQ */ + tx->tx_nwrq = tx->tx_nsge = 0; /* overwrite PUT_REQ */ rc2 = kiblnd_init_rdma(conn, tx, IBLND_MSG_PUT_DONE, kiblnd_rd_size(&msg->ibm_u.putack.ibpam_rd), @@ -444,13 +477,14 @@ kiblnd_handle_rx (kib_rx_t *rx) 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_REQ: + post_credit = IBLND_POSTRX_DONT_POST; + lnet_hdr_from_nid4(&hdr, &msg->ibm_u.get.ibgm_hdr); + lnet_nid4_to_nid(msg->ibm_srcnid, &srcnid); + rc = lnet_parse(ni, &hdr, &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; @@ -463,59 +497,59 @@ kiblnd_handle_rx (kib_rx_t *rx) if (rc < 0) /* protocol error */ kiblnd_close_conn(conn, rc); - if (post_credit != IBLND_POSTRX_DONT_POST) - kiblnd_post_rx(rx, post_credit); + 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) +kiblnd_rx_complete(struct kib_rx *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 != NULL); - 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; - } + struct kib_msg *msg = rx->rx_msg; + struct kib_conn *conn = rx->rx_conn; + struct lnet_ni *ni = conn->ibc_peer->ibp_ni; + struct kib_net *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; + LASSERT(nob >= 0); + rx->rx_nob = nob; - rc = kiblnd_unpack_msg(msg, rx->rx_nob); - if (rc != 0) { - CERROR ("Error %d unpacking rx from %s\n", - rc, libcfs_nid2str(conn->ibc_peer->ibp_nid)); - goto failed; - } + rc = kiblnd_unpack_msg(msg, rx->rx_nob); + if (rc != 0) { + 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; - } + if (msg->ibm_srcnid != conn->ibc_peer->ibp_nid || + msg->ibm_dstnid != lnet_nid_to_nid4(&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); + /* set time last known alive */ + kiblnd_peer_alive(conn->ibc_peer); - /* racing with connection establishment/teardown! */ + /* racing with connection establishment/teardown! */ - if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { + if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { rwlock_t *g_lock = &kiblnd_data.kib_global_lock; unsigned long flags; @@ -527,119 +561,180 @@ kiblnd_rx_complete (kib_rx_t *rx, int status, int nob) return; } write_unlock_irqrestore(g_lock, flags); - } - kiblnd_handle_rx(rx); - return; + } + 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 != NULL); - 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 != NULL); - return page; +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 int -kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, __u32 nob) +kiblnd_fmr_map_tx(struct kib_net *net, struct kib_tx *tx, + struct kib_rdma_desc *rd, u32 nob) { - kib_hca_dev_t *hdev; - __u64 *pages = tx->tx_pages; - kib_fmr_poolset_t *fps; - int npages; - int size; + struct kib_hca_dev *hdev; + struct kib_dev *dev; + struct kib_fmr_poolset *fps; int cpt; int rc; - int i; + int i; LASSERT(tx->tx_pool != NULL); LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL); - hdev = tx->tx_pool->tpo_hdev; + dev = net->ibn_dev; + hdev = tx->tx_pool->tpo_hdev; + cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt; - 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; - } - } + /* + * If we're dealing with FastReg, but the device doesn't + * support GAPS and the tx has GAPS, then there is no real point + * in trying to map the memory, because it'll just fail. So + * preemptively fail with an appropriate message + */ + if (IS_FAST_REG_DEV(dev) && + !(dev->ibd_dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT) && + tx->tx_gaps) { + CERROR("Using FastReg with no GAPS support, but tx has gaps. " + "Try setting use_fastreg_gaps to 1\n"); + return -EPROTONOSUPPORT; + } - cpt = tx->tx_pool->tpo_pool.po_owner->ps_cpt; +#ifdef HAVE_OFED_FMR_POOL_API + /* + * FMR does not support gaps but the tx has gaps then + * we should make sure that the number of fragments we'll be sending + * over fits within the number of fragments negotiated on the + * connection, otherwise, we won't be able to RDMA the data. + * We need to maintain the number of fragments negotiation on the + * connection for backwards compatibility. + */ + if (tx->tx_gaps && (dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED)) { + if (tx->tx_conn && + tx->tx_conn->ibc_max_frags <= rd->rd_nfrags) { + CERROR("TX number of frags (%d) is <= than connection" + " number of frags (%d). Consider setting peer's" + " map_on_demand to 256\n", tx->tx_nfrags, + tx->tx_conn->ibc_max_frags); + return -EFBIG; + } + } +#endif fps = net->ibn_fmr_ps[cpt]; - rc = kiblnd_fmr_pool_map(fps, pages, npages, nob, 0, (rd != tx->tx_rd), - &tx->fmr); + rc = kiblnd_fmr_pool_map(fps, tx, rd, nob, 0, &tx->tx_fmr); if (rc != 0) { - CERROR("Can't map %d pages: %d\n", npages, rc); + CERROR("Can't map %u bytes (%u/%u)s: %d\n", nob, + tx->tx_nfrags, rd->rd_nfrags, 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 = tx->fmr.fmr_key; - rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask; - rd->rd_frags[0].rf_nob = nob; - rd->rd_nfrags = 1; + /* + * If rd is not tx_rd, it's going to get sent to a peer_ni, who will + * need the rkey + */ + rd->rd_key = tx->tx_fmr.fmr_key; + /* + * for FastReg or FMR with no gaps we can accumulate all + * the fragments in one FastReg or FMR fragment. + */ + if ( +#ifdef HAVE_OFED_FMR_POOL_API + ((dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED) + && !tx->tx_gaps) || +#endif + IS_FAST_REG_DEV(dev)) { + /* FMR requires zero based address */ +#ifdef HAVE_OFED_FMR_POOL_API + if (dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED) + rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask; +#endif + rd->rd_frags[0].rf_nob = nob; + rd->rd_nfrags = 1; + } else { + /* + * We're transmitting with gaps using FMR. + * We'll need to use multiple fragments and identify the + * zero based address of each fragment. + */ + for (i = 0; i < rd->rd_nfrags; i++) { + rd->rd_frags[i].rf_addr &= ~hdev->ibh_page_mask; + rd->rd_frags[i].rf_addr += i << hdev->ibh_page_shift; + } + } return 0; } static void -kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx) +kiblnd_unmap_tx(struct kib_tx *tx) { - kib_net_t *net = ni->ni_data; + if ( +#ifdef HAVE_OFED_FMR_POOL_API + tx->tx_fmr.fmr_pfmr || +#endif + tx->tx_fmr.fmr_frd) + kiblnd_fmr_pool_unmap(&tx->tx_fmr, tx->tx_status); - LASSERT(net != NULL); + if (tx->tx_nfrags != 0) { + kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev, tx); + tx->tx_nfrags = 0; + } +} - if (net->ibn_fmr_ps != NULL) - kiblnd_fmr_pool_unmap(&tx->fmr, tx->tx_status); +#ifdef HAVE_OFED_IB_GET_DMA_MR +static struct ib_mr * +kiblnd_find_rd_dma_mr(struct lnet_ni *ni, struct kib_rdma_desc *rd) +{ + struct kib_net *net = ni->ni_data; + struct kib_hca_dev *hdev = net->ibn_dev->ibd_hdev; + struct lnet_ioctl_config_o2iblnd_tunables *tunables; - if (tx->tx_nfrags != 0) { - kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev, - tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir); - tx->tx_nfrags = 0; - } + tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib; + + /* + * if map-on-demand is turned on and the device supports + * either FMR or FastReg then use that. Otherwise use global + * memory regions. If that's not available either, then you're + * dead in the water and fail the operation. + */ + if (tunables->lnd_map_on_demand && (IS_FAST_REG_DEV(net->ibn_dev) +#ifdef HAVE_OFED_FMR_POOL_API + || net->ibn_dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED +#endif + )) + return NULL; + + /* + * hdev->ibh_mrs can be NULL. This case is dealt with gracefully + * in the call chain. The mapping will fail with appropriate error + * message. + */ + return hdev->ibh_mrs; } +#endif -static int -kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, int nfrags) +static int kiblnd_map_tx(struct lnet_ni *ni, struct kib_tx *tx, + struct kib_rdma_desc *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; + struct kib_net *net = ni->ni_data; + struct kib_hca_dev *hdev = net->ibn_dev->ibd_hdev; +#ifdef HAVE_OFED_IB_GET_DMA_MR + struct ib_mr *mr = NULL; +#endif __u32 nob; int i; - /* If rd is not tx_rd, it's going to get sent to a peer and I'm the + /* If rd is not tx_rd, it's going to get sent to a peer_ni 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); - + rd->rd_nfrags = kiblnd_dma_map_sg(hdev, tx); 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]); @@ -648,14 +743,14 @@ kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, int nfrags) nob += rd->rd_frags[i].rf_nob; } - mr = kiblnd_find_rd_dma_mr(hdev, rd, - (tx->tx_conn != NULL) ? - tx->tx_conn->ibc_max_frags : -1); +#ifdef HAVE_OFED_IB_GET_DMA_MR + mr = kiblnd_find_rd_dma_mr(ni, rd); if (mr != NULL) { /* found pre-mapping MR */ rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey; return 0; } +#endif if (net->ibn_fmr_ps != NULL) return kiblnd_fmr_map_tx(net, tx, rd, nob); @@ -663,113 +758,86 @@ kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, int nfrags) 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) +static int kiblnd_setup_rd_kiov(struct lnet_ni *ni, struct kib_tx *tx, + struct kib_rdma_desc *rd, int nkiov, + struct bio_vec *kiov, 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 != NULL); + struct kib_net *net = ni->ni_data; + struct scatterlist *sg; + int fragnob; + int max_nkiov; + int sg_count = 0; - 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 == NULL) { - CERROR ("Can't find page\n"); - return -EFAULT; - } + CDEBUG(D_NET, "niov %d offset %d nob %d gpu %d\n", + nkiov, offset, nob, tx->tx_gpu); - 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); -} + LASSERT(nob > 0); + LASSERT(nkiov > 0); + LASSERT(net != NULL); -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; + while (offset >= kiov->bv_len) { + offset -= kiov->bv_len; + nkiov--; + kiov++; + LASSERT(nkiov > 0); + } - CDEBUG(D_NET, "niov %d offset %d nob %d\n", nkiov, offset, nob); + max_nkiov = nkiov; - LASSERT (nob > 0); - LASSERT (nkiov > 0); - LASSERT (net != NULL); + sg = tx->tx_frags; + do { + LASSERT(nkiov > 0); - while (offset >= kiov->kiov_len) { - offset -= kiov->kiov_len; - nkiov--; - kiov++; - LASSERT (nkiov > 0); - } + if (!sg) { + CERROR("lacking enough sg entries to map tx\n"); + return -EFAULT; + } + sg_count++; - sg = tx->tx_frags; - do { - LASSERT (nkiov > 0); + fragnob = min((int)(kiov->bv_len - offset), nob); - fragnob = min((int)(kiov->kiov_len - offset), nob); + /* + * We're allowed to start at a non-aligned page offset in + * the first fragment and end at a non-aligned page offset + * in the last fragment. + */ + if ((fragnob < (int)(kiov->bv_len - offset)) && + nkiov < max_nkiov && nob > fragnob) { + CDEBUG(D_NET, "fragnob %d < available page %d: with" + " remaining %d kiovs with %d nob left\n", + fragnob, (int)(kiov->bv_len - offset), + nkiov, nob); + tx->tx_gaps = true; + } - sg_set_page(sg, kiov->kiov_page, fragnob, - kiov->kiov_offset + offset); - sg++; + sg_set_page(sg, kiov->bv_page, fragnob, + kiov->bv_offset + offset); + sg = sg_next(sg); - offset = 0; - kiov++; - nkiov--; - nob -= fragnob; - } while (nob > 0); + offset = 0; + kiov++; + nkiov--; + nob -= fragnob; + } while (nob > 0); - return kiblnd_map_tx(ni, tx, rd, sg - tx->tx_frags); + return kiblnd_map_tx(ni, tx, rd, sg_count); } static int -kiblnd_post_tx_locked (kib_conn_t *conn, kib_tx_t *tx, int credit) +kiblnd_post_tx_locked(struct kib_conn *conn, struct kib_tx *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; + struct kib_msg *msg = tx->tx_msg; + struct kib_peer_ni *peer_ni = conn->ibc_peer; + struct lnet_ni *ni = peer_ni->ibp_ni; + struct kib_fast_reg_descriptor *frd = tx->tx_fmr.fmr_frd; + 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 > 0 && tx->tx_nsge >= 0); LASSERT(tx->tx_nwrq <= 1 + conn->ibc_max_frags); LASSERT(credit == 0 || credit == 1); @@ -778,16 +846,20 @@ __must_hold(&conn->ibc_lock) 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 (conn->ibc_nsends_posted == + kiblnd_concurrent_sends(ver, ni)) { + /* tx completions outstanding... */ + CDEBUG(D_NET, "%s: posted enough\n", + libcfs_nid2str(peer_ni->ibp_nid)); + return -EAGAIN; + } if (credit != 0 && conn->ibc_credits == 0) { /* no credits */ - CDEBUG(D_NET, "%s: no credits\n", - libcfs_nid2str(peer->ibp_nid)); + CDEBUG(D_NET, "%s: no credits cm_id %p qp_num 0x%x\n", + libcfs_nid2str(peer_ni->ibp_nid), + conn->ibc_cmid, + conn->ibc_cmid->qp ? conn->ibc_cmid->qp->qp_num : 0); + kiblnd_dump_conn_dbg(conn); return -EAGAIN; } @@ -795,7 +867,7 @@ __must_hold(&conn->ibc_lock) 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)); + libcfs_nid2str(peer_ni->ibp_nid)); return -EAGAIN; } @@ -807,70 +879,97 @@ __must_hold(&conn->ibc_lock) (!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 */ + /* OK to drop when posted enough NOOPs, since + * kiblnd_check_sends_locked will queue NOOP again when + * posted NOOPs complete */ spin_unlock(&conn->ibc_lock); - kiblnd_tx_done(peer->ibp_ni, tx); + tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR; + kiblnd_tx_done(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; + CDEBUG(D_NET, "%s(%d): redundant or enough NOOP cm_id %p qp_num 0x%x\n", + libcfs_nid2str(peer_ni->ibp_nid), + conn->ibc_noops_posted, + conn->ibc_cmid, + conn->ibc_cmid->qp ? conn->ibc_cmid->qp->qp_num : 0); + kiblnd_dump_conn_dbg(conn); + 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++; + CDEBUG(D_NET, "Transmit %x[%d] nob %u cm_id %p qp_num 0x%x\n", + msg->ibm_type, credit, + msg->ibm_nob, + conn->ibc_cmid, + conn->ibc_cmid->qp ? conn->ibc_cmid->qp->qp_num : 0); + kiblnd_dump_conn_dbg(conn); + + kiblnd_pack_msg(peer_ni->ibp_ni, msg, ver, conn->ibc_outstanding_credits, + peer_ni->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) { + CDEBUG(D_NET, "connection to %s is not established\n", + conn->ibc_peer? libcfs_nid2str(conn->ibc_peer->ibp_nid): "NULL"); 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 kib_fast_reg_descriptor *frd = tx->fmr.fmr_frd; - struct ib_send_wr *bad = &tx->tx_wrq[tx->tx_nwrq - 1]; - struct ib_send_wr *wrq = tx->tx_wrq; - - if (frd != NULL) { - if (!frd->frd_valid) { - wrq = &frd->frd_inv_wr; - wrq->next = &frd->frd_fastreg_wr; - } else { - wrq = &frd->frd_fastreg_wr; - } - frd->frd_fastreg_wr.next = tx->tx_wrq; + struct ib_send_wr *bad = &tx->tx_wrq[tx->tx_nwrq - 1].wr; + struct ib_send_wr *wr = &tx->tx_wrq[0].wr; + + if (frd != NULL && !frd->frd_posted) { + wr = &frd->frd_inv_wr.wr; + wr->next = &frd->frd_fastreg_wr.wr; + frd->frd_fastreg_wr.wr.next = &tx->tx_wrq[0].wr; } LASSERTF(bad->wr_id == kiblnd_ptr2wreqid(tx, IBLND_WID_TX), - "bad wr_id "LPX64", opc %d, flags %d, peer: %s\n", + "bad wr_id %#llx, opc %d, flags %d, peer_ni: %s\n", bad->wr_id, bad->opcode, bad->send_flags, libcfs_nid2str(conn->ibc_peer->ibp_nid)); + bad = NULL; - rc = ib_post_send(conn->ibc_cmid->qp, wrq, &bad); + if (lnet_send_error_simulation(tx->tx_lntmsg[0], &tx->tx_hstatus)) + rc = -EINVAL; + else +#ifdef HAVE_OFED_IB_POST_SEND_RECV_CONST + rc = ib_post_send(conn->ibc_cmid->qp, wr, + (const struct ib_send_wr **)&bad); +#else + rc = ib_post_send(conn->ibc_cmid->qp, wr, &bad); +#endif + if (frd && !frd->frd_posted) { + /* The local invalidate becomes invalid (has been + * successfully used) if the post succeeds or the + * failing wr was not the invalidate. */ + frd->frd_valid = + !(rc == 0 || (bad != &frd->frd_inv_wr.wr)); + } } - conn->ibc_last_send = jiffies; + conn->ibc_last_send = ktime_get(); - if (rc == 0) - return 0; + if (rc == 0) { + if (frd != NULL) + frd->frd_posted = true; + return 0; + } /* NB credits are transferred in the actual * message, which can only be the last work item */ @@ -892,15 +991,15 @@ __must_hold(&conn->ibc_lock) if (conn->ibc_state == IBLND_CONN_ESTABLISHED) CERROR("Error %d posting transmit to %s\n", - rc, libcfs_nid2str(peer->ibp_nid)); + rc, libcfs_nid2str(peer_ni->ibp_nid)); else CDEBUG(D_NET, "Error %d posting transmit to %s\n", - rc, libcfs_nid2str(peer->ibp_nid)); + rc, libcfs_nid2str(peer_ni->ibp_nid)); kiblnd_close_conn(conn, rc); - if (done) - kiblnd_tx_done(peer->ibp_ni, tx); + if (done) + kiblnd_tx_done(tx); spin_lock(&conn->ibc_lock); @@ -908,11 +1007,11 @@ __must_hold(&conn->ibc_lock) } static void -kiblnd_check_sends (kib_conn_t *conn) +kiblnd_check_sends_locked(struct kib_conn *conn) { - int ver = conn->ibc_version; - lnet_ni_t *ni = conn->ibc_peer->ibp_ni; - kib_tx_t *tx; + int ver = conn->ibc_version; + struct lnet_ni *ni = conn->ibc_peer->ibp_ni; + struct kib_tx *tx; /* Don't send anything until after the connection is established */ if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { @@ -921,19 +1020,16 @@ kiblnd_check_sends (kib_conn_t *conn) return; } - spin_lock(&conn->ibc_lock); - - LASSERT (conn->ibc_nsends_posted <= IBLND_CONCURRENT_SENDS(ver)); + LASSERT(conn->ibc_nsends_posted <= + kiblnd_concurrent_sends(ver, ni)); 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); + (tx = list_first_entry_or_null(&conn->ibc_tx_queue_rsrvd, + struct kib_tx, tx_list)) != NULL) { + list_move_tail(&tx->tx_list, &conn->ibc_tx_queue); conn->ibc_reserved_credits--; } @@ -954,48 +1050,50 @@ kiblnd_check_sends (kib_conn_t *conn) if (!list_empty(&conn->ibc_tx_queue_nocred)) { credit = 0; - tx = list_entry(conn->ibc_tx_queue_nocred.next, - kib_tx_t, tx_list); + tx = list_first_entry(&conn->ibc_tx_queue_nocred, + struct kib_tx, 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); + tx = list_first_entry(&conn->ibc_tx_noops, + struct kib_tx, 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); + tx = list_first_entry(&conn->ibc_tx_queue, + struct kib_tx, tx_list); } else break; if (kiblnd_post_tx_locked(conn, tx, credit) != 0) break; } - - spin_unlock(&conn->ibc_lock); } static void -kiblnd_tx_complete (kib_tx_t *tx, int status) +kiblnd_tx_complete(struct kib_tx *tx, int status) { - int failed = (status != IB_WC_SUCCESS); - kib_conn_t *conn = tx->tx_conn; - int idle; + int failed = (status != IB_WC_SUCCESS); + struct kib_conn *conn = tx->tx_conn; + int idle; - LASSERT (tx->tx_sending > 0); + if (tx->tx_sending <= 0) { + CERROR("Received an event on a freed tx: %p status %d\n", + tx, tx->tx_status); + return; + } - if (failed) { - if (conn->ibc_state == IBLND_CONN_ESTABLISHED) - CNETERR("Tx -> %s cookie "LPX64 - " 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); - } + 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); @@ -1008,95 +1106,118 @@ kiblnd_tx_complete (kib_tx_t *tx, int status) conn->ibc_noops_posted--; if (failed) { - tx->tx_waiting = 0; /* don't wait for peer */ + tx->tx_hstatus = LNET_MSG_STATUS_REMOTE_DROPPED; + tx->tx_waiting = 0; /* don't wait for peer_ni */ tx->tx_status = -EIO; +#ifdef O2IBLND_CONN_STATE_DEBUG + kiblnd_dump_conn_dbg(conn); +#endif } idle = (tx->tx_sending == 0) && /* This is the final callback */ - !tx->tx_waiting && /* Not waiting for peer */ + !tx->tx_waiting && /* Not waiting for peer_ni */ !tx->tx_queued; /* Not re-queued (PUT_DONE) */ if (idle) list_del(&tx->tx_list); - kiblnd_conn_addref(conn); /* 1 ref for me.... */ - + kiblnd_check_sends_locked(conn); spin_unlock(&conn->ibc_lock); - if (idle) - kiblnd_tx_done(conn->ibc_peer->ibp_ni, tx); + if (idle) + kiblnd_tx_done(tx); +} - kiblnd_check_sends(conn); - kiblnd_conn_decref(conn); /* ...until here */ +static void +kiblnd_init_tx_sge(struct kib_tx *tx, u64 addr, unsigned int len) +{ + struct ib_sge *sge = &tx->tx_sge[tx->tx_nsge]; + struct kib_hca_dev *hdev = tx->tx_pool->tpo_hdev; +#ifdef HAVE_OFED_IB_GET_DMA_MR + struct ib_mr *mr = hdev->ibh_mrs; +#endif + + *sge = (struct ib_sge) { +#ifdef HAVE_OFED_IB_GET_DMA_MR + .lkey = mr->lkey, +#else + .lkey = hdev->ibh_pd->local_dma_lkey, +#endif + .addr = addr, + .length = len, + }; + + tx->tx_nsge++; } -static void -kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob) +static struct ib_rdma_wr * +kiblnd_init_tx_msg_payload(struct lnet_ni *ni, struct kib_tx *tx, int type, + int body_nob, int payload) { - kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev; - struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq]; - struct ib_send_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; + struct ib_rdma_wr *wrq; + int nob = offsetof(struct kib_msg, ibm_u) + body_nob; LASSERT(tx->tx_nwrq >= 0); LASSERT(tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1); LASSERT(nob <= IBLND_MSG_SIZE); - LASSERT(mr != NULL); - kiblnd_init_msg(tx->tx_msg, type, body_nob); + kiblnd_init_msg(tx->tx_msg, type, body_nob + payload); - sge->lkey = mr->lkey; - sge->addr = tx->tx_msgaddr; - sge->length = nob; + wrq = &tx->tx_wrq[tx->tx_nwrq]; - memset(wrq, 0, sizeof(*wrq)); + *wrq = (struct ib_rdma_wr) { + .wr = { + .wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX), + .num_sge = 1, + .sg_list = &tx->tx_sge[tx->tx_nsge], + .opcode = IB_WR_SEND, + .send_flags = IB_SEND_SIGNALED, + }, + }; - wrq->next = NULL; - wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_TX); - wrq->sg_list = sge; - wrq->num_sge = 1; - wrq->opcode = IB_WR_SEND; - wrq->send_flags = IB_SEND_SIGNALED; + kiblnd_init_tx_sge(tx, tx->tx_msgaddr, nob); - tx->tx_nwrq++; + tx->tx_nwrq++; + return wrq; } static int -kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type, - int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie) +kiblnd_init_rdma(struct kib_conn *conn, struct kib_tx *tx, int type, + int resid, struct kib_rdma_desc *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_send_wr *wrq = &tx->tx_wrq[0]; - int rc = resid; - int srcidx; - int dstidx; - int wrknob; + struct kib_msg *ibmsg = tx->tx_msg; + struct kib_rdma_desc *srcrd = tx->tx_rd; + struct ib_rdma_wr *wrq = NULL; + struct ib_sge *sge; + int rc = resid; + int srcidx; + int dstidx; + int sge_nob; + int wrq_sge; - LASSERT (!in_interrupt()); - LASSERT (tx->tx_nwrq == 0); - LASSERT (type == IBLND_MSG_GET_DONE || - type == IBLND_MSG_PUT_DONE); + LASSERT(!in_interrupt()); + LASSERT(tx->tx_nwrq == 0 && tx->tx_nsge == 0); + LASSERT(type == IBLND_MSG_GET_DONE || type == IBLND_MSG_PUT_DONE); - srcidx = dstidx = 0; + for (srcidx = dstidx = wrq_sge = sge_nob = 0; + resid > 0; resid -= sge_nob) { + int prev = dstidx; - while (resid > 0) { - if (srcidx >= srcrd->rd_nfrags) { - CERROR("Src buffer exhausted: %d frags\n", srcidx); - rc = -EPROTO; - break; - } + if (srcidx >= srcrd->rd_nfrags) { + CERROR("Src buffer exhausted: %d frags %px\n", + srcidx, tx); + rc = -EPROTO; + break; + } - if (dstidx == dstrd->rd_nfrags) { - CERROR("Dst buffer exhausted: %d frags\n", dstidx); - 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), " + CERROR("RDMA has too many fragments for peer_ni %s (%d), " "src idx/frags: %d/%d dst idx/frags: %d/%d\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), conn->ibc_max_frags, @@ -1106,60 +1227,91 @@ kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type, break; } - wrknob = MIN(MIN(kiblnd_rd_frag_size(srcrd, srcidx), - kiblnd_rd_frag_size(dstrd, dstidx)), 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]; - - wrq->next = wrq + 1; - wrq->wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA); - wrq->sg_list = sge; - wrq->num_sge = 1; - wrq->opcode = IB_WR_RDMA_WRITE; - wrq->send_flags = 0; - - wrq->wr.rdma.remote_addr = kiblnd_rd_frag_addr(dstrd, dstidx); - wrq->wr.rdma.rkey = kiblnd_rd_frag_key(dstrd, dstidx); - - srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, wrknob); - dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, wrknob); + sge_nob = min3(kiblnd_rd_frag_size(srcrd, srcidx), + kiblnd_rd_frag_size(dstrd, dstidx), + resid); + + sge = &tx->tx_sge[tx->tx_nsge]; + sge->addr = kiblnd_rd_frag_addr(srcrd, srcidx); + sge->lkey = kiblnd_rd_frag_key(srcrd, srcidx); + sge->length = sge_nob; + + if (wrq_sge == 0) { + wrq = &tx->tx_wrq[tx->tx_nwrq]; + + wrq->wr.next = &(wrq + 1)->wr; + wrq->wr.wr_id = kiblnd_ptr2wreqid(tx, IBLND_WID_RDMA); + wrq->wr.sg_list = sge; + wrq->wr.opcode = IB_WR_RDMA_WRITE; + wrq->wr.send_flags = 0; + +#ifdef HAVE_OFED_IB_RDMA_WR + wrq->remote_addr = kiblnd_rd_frag_addr(dstrd, + dstidx); + wrq->rkey = kiblnd_rd_frag_key(dstrd, + dstidx); +#else + wrq->wr.wr.rdma.remote_addr = kiblnd_rd_frag_addr(dstrd, + dstidx); + wrq->wr.wr.rdma.rkey = kiblnd_rd_frag_key(dstrd, + dstidx); +#endif + } - resid -= wrknob; + srcidx = kiblnd_rd_consume_frag(srcrd, srcidx, sge_nob); + dstidx = kiblnd_rd_consume_frag(dstrd, dstidx, sge_nob); - tx->tx_nwrq++; - wrq++; - sge++; - } + wrq_sge++; + if (wrq_sge == *kiblnd_tunables.kib_wrq_sge || dstidx != prev) { + tx->tx_nwrq++; + wrq->wr.num_sge = wrq_sge; + wrq_sge = 0; + } + tx->tx_nsge++; + } - if (rc < 0) /* no RDMA if completing with failure */ - tx->tx_nwrq = 0; + if (rc < 0) /* no RDMA if completing with failure */ + tx->tx_nwrq = tx->tx_nsge = 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)); + type, sizeof(struct kib_completion_msg)); return rc; } static void -kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn) +kiblnd_queue_tx_locked(struct kib_tx *tx, struct kib_conn *conn) { struct list_head *q; + s64 timeout_ns; 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); + if (conn->ibc_state >= IBLND_CONN_DISCONNECTED) { + CDEBUG(D_NET, "connection with %s is disconnected\n", + conn->ibc_peer? libcfs_nid2str(conn->ibc_peer->ibp_nid): "NULL"); + + tx->tx_status = -ECONNABORTED; + tx->tx_waiting = 0; + if (tx->tx_conn != NULL) { + /* 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); + tx->tx_conn = NULL; + kiblnd_conn_decref(conn); + } + list_add(&tx->tx_list, &conn->ibc_zombie_txs); + + return; + } + + timeout_ns = kiblnd_timeout() * NSEC_PER_SEC; tx->tx_queued = 1; - tx->tx_deadline = jiffies + - msecs_to_jiffies(*kiblnd_tunables.kib_timeout * - MSEC_PER_SEC); + tx->tx_deadline = ktime_add_ns(ktime_get(), timeout_ns); if (tx->tx_conn == NULL) { kiblnd_conn_addref(conn); @@ -1203,19 +1355,19 @@ 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) +kiblnd_queue_tx(struct kib_tx *tx, struct kib_conn *conn) { spin_lock(&conn->ibc_lock); kiblnd_queue_tx_locked(tx, conn); + kiblnd_check_sends_locked(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) +static int +kiblnd_resolve_addr_cap(struct rdma_cm_id *cmid, + struct sockaddr_in *srcaddr, + struct sockaddr_in *dstaddr, + int timeout_ms) { unsigned short port; int rc; @@ -1245,30 +1397,58 @@ static int kiblnd_resolve_addr(struct rdma_cm_id *cmid, } } - CERROR("Failed to bind to a free privileged port\n"); - return rc; + CERROR("cannot bind to a free privileged port: rc = %d\n", rc); + + return rc; +} + +static int +kiblnd_resolve_addr(struct rdma_cm_id *cmid, + struct sockaddr_in *srcaddr, + struct sockaddr_in *dstaddr, + int timeout_ms) +{ + const struct cred *old_creds = NULL; + struct cred *new_creds; + int rc; + + if (!capable(CAP_NET_BIND_SERVICE)) { + new_creds = prepare_kernel_cred(NULL); + if (!new_creds) + return -ENOMEM; + + cap_raise(new_creds->cap_effective, CAP_NET_BIND_SERVICE); + old_creds = override_creds(new_creds); + } + + rc = kiblnd_resolve_addr_cap(cmid, srcaddr, dstaddr, timeout_ms); + + if (old_creds) + revert_creds(old_creds); + + return rc; } static void -kiblnd_connect_peer (kib_peer_t *peer) +kiblnd_connect_peer(struct kib_peer_ni *peer_ni) { struct rdma_cm_id *cmid; - kib_dev_t *dev; - kib_net_t *net = peer->ibp_ni->ni_data; + struct kib_dev *dev; + struct kib_net *net = peer_ni->ibp_ni->ni_data; struct sockaddr_in srcaddr; struct sockaddr_in dstaddr; - int rc; + int rc; LASSERT (net != NULL); - LASSERT (peer->ibp_connecting > 0); - LASSERT(!peer->ibp_reconnecting); + LASSERT (peer_ni->ibp_connecting > 0); - cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP, - IB_QPT_RC); + cmid = kiblnd_rdma_create_id(peer_ni->ibp_ni->ni_net_ns, + kiblnd_cm_callback, peer_ni, + 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)); + libcfs_nid2str(peer_ni->ibp_nid), PTR_ERR(cmid)); rc = PTR_ERR(cmid); goto failed; } @@ -1281,59 +1461,52 @@ kiblnd_connect_peer (kib_peer_t *peer) 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)); + dstaddr.sin_addr.s_addr = htonl(LNET_NIDADDR(peer_ni->ibp_nid)); - kiblnd_peer_addref(peer); /* cmid's ref */ + kiblnd_peer_addref(peer_ni); /* 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 != 0) { - /* 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 != NULL); - 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); + if (*kiblnd_tunables.kib_use_priv_port) { + rc = kiblnd_resolve_addr(cmid, &srcaddr, &dstaddr, + kiblnd_timeout() * 1000); + } else { + rc = rdma_resolve_addr(cmid, + (struct sockaddr *)&srcaddr, + (struct sockaddr *)&dstaddr, + kiblnd_timeout() * 1000); + } + if (rc != 0) { + /* Can't initiate address resolution: */ + CERROR("Can't resolve addr for %s: %d\n", + libcfs_nid2str(peer_ni->ibp_nid), rc); + goto failed2; + } return; failed2: - kiblnd_peer_connect_failed(peer, 1, rc); - kiblnd_peer_decref(peer); /* cmid's ref */ + kiblnd_peer_connect_failed(peer_ni, 1, rc); + kiblnd_peer_decref(peer_ni); /* cmid's ref */ rdma_destroy_id(cmid); return; failed: - kiblnd_peer_connect_failed(peer, 1, rc); + kiblnd_peer_connect_failed(peer_ni, 1, rc); } bool -kiblnd_reconnect_peer(kib_peer_t *peer) +kiblnd_reconnect_peer(struct kib_peer_ni *peer_ni) { - rwlock_t *glock = &kiblnd_data.kib_global_lock; - char *reason = NULL; - struct list_head txs; - unsigned long flags; - - INIT_LIST_HEAD(&txs); + rwlock_t *glock = &kiblnd_data.kib_global_lock; + char *reason = NULL; + LIST_HEAD(txs); + unsigned long flags; write_lock_irqsave(glock, flags); - if (peer->ibp_reconnecting == 0) { - if (peer->ibp_accepting) + if (peer_ni->ibp_reconnecting == 0) { + if (peer_ni->ibp_accepting) reason = "accepting"; - else if (peer->ibp_connecting) + else if (peer_ni->ibp_connecting) reason = "connecting"; - else if (!list_empty(&peer->ibp_conns)) + else if (!list_empty(&peer_ni->ibp_conns)) reason = "connected"; else /* connected then closed */ reason = "closed"; @@ -1341,116 +1514,131 @@ kiblnd_reconnect_peer(kib_peer_t *peer) goto no_reconnect; } - LASSERT(!peer->ibp_accepting && !peer->ibp_connecting && - list_empty(&peer->ibp_conns)); - peer->ibp_reconnecting = 0; + if (peer_ni->ibp_accepting) + CNETERR("Detecting race between accepting and reconnecting\n"); + peer_ni->ibp_reconnecting--; - if (!kiblnd_peer_active(peer)) { - list_splice_init(&peer->ibp_tx_queue, &txs); + if (!kiblnd_peer_active(peer_ni)) { + list_splice_init(&peer_ni->ibp_tx_queue, &txs); reason = "unlinked"; goto no_reconnect; } - peer->ibp_connecting++; - peer->ibp_reconnected++; + peer_ni->ibp_connecting++; + peer_ni->ibp_reconnected++; + write_unlock_irqrestore(glock, flags); - kiblnd_connect_peer(peer); + kiblnd_connect_peer(peer_ni); return true; no_reconnect: write_unlock_irqrestore(glock, flags); CWARN("Abort reconnection of %s: %s\n", - libcfs_nid2str(peer->ibp_nid), reason); - kiblnd_txlist_done(peer->ibp_ni, &txs, -ECONNABORTED); + libcfs_nid2str(peer_ni->ibp_nid), reason); + kiblnd_txlist_done(&txs, -ECONNABORTED, + LNET_MSG_STATUS_LOCAL_ABORTED); return false; } void -kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) +kiblnd_launch_tx(struct lnet_ni *ni, struct kib_tx *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; + struct kib_peer_ni *peer_ni; + struct kib_peer_ni *peer2; + struct kib_conn *conn; + rwlock_t *g_lock = &kiblnd_data.kib_global_lock; + unsigned long flags; + int rc; + int i; + struct lnet_ioctl_config_o2iblnd_tunables *tunables; + s64 timeout_ns; - /* If I get here, I've committed to send, so I complete the tx with - * failure on any problems */ + /* If I get here, I've committed to send, so I complete the tx with + * failure on any problems + */ - LASSERT (tx == NULL || tx->tx_conn == NULL); /* only set when assigned a conn */ - LASSERT (tx == NULL || tx->tx_nwrq > 0); /* work items have been set up */ + 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 */ + /* First time, just use a read lock since I expect to find my peer_ni + * connected + */ read_lock_irqsave(g_lock, flags); - peer = kiblnd_find_peer_locked(nid); - if (peer != NULL && !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... */ + peer_ni = kiblnd_find_peer_locked(ni, nid); + if (peer_ni != NULL && !list_empty(&peer_ni->ibp_conns)) { + /* Found a peer_ni with an established connection */ + conn = kiblnd_get_conn_locked(peer_ni); + kiblnd_conn_addref(conn); /* 1 ref for me... */ read_unlock_irqrestore(g_lock, flags); - if (tx != NULL) - kiblnd_queue_tx(tx, conn); - kiblnd_conn_decref(conn); /* ...to here */ - return; - } + if (tx != NULL) + kiblnd_queue_tx(tx, conn); + kiblnd_conn_decref(conn); /* ...to here */ + return; + } + timeout_ns = kiblnd_timeout() * NSEC_PER_SEC; read_unlock(g_lock); /* Re-try with a write lock */ write_lock(g_lock); - peer = kiblnd_find_peer_locked(nid); - if (peer != NULL) { - if (list_empty(&peer->ibp_conns)) { - /* found a peer, but it's still connecting... */ - LASSERT(kiblnd_peer_connecting(peer)); - if (tx != NULL) + peer_ni = kiblnd_find_peer_locked(ni, nid); + if (peer_ni != NULL) { + if (list_empty(&peer_ni->ibp_conns)) { + /* found a peer_ni, but it's still connecting... */ + LASSERT(kiblnd_peer_connecting(peer_ni)); + if (tx != NULL) { + tx->tx_deadline = ktime_add_ns(ktime_get(), + timeout_ns); list_add_tail(&tx->tx_list, - &peer->ibp_tx_queue); + &peer_ni->ibp_tx_queue); + } write_unlock_irqrestore(g_lock, flags); } else { - conn = kiblnd_get_conn_locked(peer); + conn = kiblnd_get_conn_locked(peer_ni); kiblnd_conn_addref(conn); /* 1 ref for me... */ write_unlock_irqrestore(g_lock, flags); - if (tx != NULL) - kiblnd_queue_tx(tx, conn); - kiblnd_conn_decref(conn); /* ...to here */ - } - return; - } + if (tx != NULL) + 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); + /* Allocate a peer_ni ready to add to the peer_ni table and retry */ + rc = kiblnd_create_peer(ni, &peer_ni, nid); if (rc != 0) { - CERROR("Can't create peer %s\n", libcfs_nid2str(nid)); + CERROR("Can't create peer_ni %s\n", libcfs_nid2str(nid)); if (tx != NULL) { tx->tx_status = -EHOSTUNREACH; tx->tx_waiting = 0; - kiblnd_tx_done(ni, tx); + tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR; + kiblnd_tx_done(tx); } return; } write_lock_irqsave(g_lock, flags); - peer2 = kiblnd_find_peer_locked(nid); - if (peer2 != NULL) { + peer2 = kiblnd_find_peer_locked(ni, nid); + if (peer2 != NULL) { if (list_empty(&peer2->ibp_conns)) { - /* found a peer, but it's still connecting... */ + /* found a peer_ni, but it's still connecting... */ LASSERT(kiblnd_peer_connecting(peer2)); - if (tx != NULL) + if (tx != NULL) { + tx->tx_deadline = ktime_add_ns(ktime_get(), + timeout_ns); list_add_tail(&tx->tx_list, - &peer2->ibp_tx_queue); + &peer2->ibp_tx_queue); + } write_unlock_irqrestore(g_lock, flags); } else { conn = kiblnd_get_conn_locked(peer2); @@ -1458,351 +1646,372 @@ kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) write_unlock_irqrestore(g_lock, flags); - if (tx != NULL) - kiblnd_queue_tx(tx, conn); - kiblnd_conn_decref(conn); /* ...to here */ - } + if (tx != NULL) + kiblnd_queue_tx(tx, conn); + kiblnd_conn_decref(conn); /* ...to here */ + } - kiblnd_peer_decref(peer); - return; - } + kiblnd_peer_decref(peer_ni); + return; + } - /* Brand new peer */ - LASSERT (peer->ibp_connecting == 0); - peer->ibp_connecting = 1; + /* Brand new peer_ni */ + LASSERT(peer_ni->ibp_connecting == 0); + tunables = &peer_ni->ibp_ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib; + peer_ni->ibp_connecting = tunables->lnd_conns_per_peer; - /* always called with a ref on ni, which prevents ni being shutdown */ - LASSERT (((kib_net_t *)ni->ni_data)->ibn_shutdown == 0); + /* always called with a ref on ni, which prevents ni being shutdown */ + LASSERT(((struct kib_net *)ni->ni_data)->ibn_shutdown == 0); - if (tx != NULL) - list_add_tail(&tx->tx_list, &peer->ibp_tx_queue); + if (tx != NULL) { + tx->tx_deadline = ktime_add_ns(ktime_get(), timeout_ns); + list_add_tail(&tx->tx_list, &peer_ni->ibp_tx_queue); + } - kiblnd_peer_addref(peer); - list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); + kiblnd_peer_addref(peer_ni); + hash_add(kiblnd_data.kib_peers, &peer_ni->ibp_list, nid); write_unlock_irqrestore(g_lock, flags); - kiblnd_connect_peer(peer); - kiblnd_peer_decref(peer); + for (i = 0; i < tunables->lnd_conns_per_peer; i++) + kiblnd_connect_peer(peer_ni); + kiblnd_peer_decref(peer_ni); } int -kiblnd_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) +kiblnd_send(struct lnet_ni *ni, void *private, struct lnet_msg *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 == 0 || payload_niov > 0); - LASSERT (payload_niov <= LNET_MAX_IOV); + struct kib_dev *dev = ((struct kib_net *)ni->ni_data)->ibn_dev; + struct lnet_hdr *hdr = &lntmsg->msg_hdr; + int type = lntmsg->msg_type; + struct lnet_processid *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 bio_vec *payload_kiov = lntmsg->msg_kiov; + unsigned int payload_offset = lntmsg->msg_offset; + unsigned int payload_nob = lntmsg->msg_len; + struct lnet_libmd *msg_md = lntmsg->msg_md; + bool gpu; + struct kib_msg *ibmsg; + struct kib_rdma_desc *rd; + struct kib_tx *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_idstr(target)); + + LASSERT(payload_nob == 0 || payload_niov > 0); /* Thread context */ - LASSERT (!in_interrupt()); - /* payload is either all vaddrs or all pages */ - LASSERT (!(payload_kiov != NULL && payload_iov != NULL)); + LASSERT(!in_interrupt()); + + tx = kiblnd_get_idle_tx(ni, lnet_nid_to_nid4(&target->nid)); + if (tx == NULL) { + CERROR("Can't allocate %s txd for %s\n", + lnet_msgtyp2str(type), + libcfs_nidstr(&target->nid)); + return -ENOMEM; + } + ibmsg = tx->tx_msg; + gpu = lnet_md_is_gpu(msg_md); switch (type) { default: LBUG(); return (-EIO); - case LNET_MSG_ACK: - LASSERT (payload_nob == 0); - break; - - case LNET_MSG_GET: - if (routing || target_is_router) - break; /* send IMMEDIATE */ + case LNET_MSG_ACK: + LASSERT(payload_nob == 0); + break; - /* 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 */ + case LNET_MSG_GET: + if (routing || target_is_router) + break; /* send IMMEDIATE */ - tx = kiblnd_get_idle_tx(ni, target.nid); - if (tx == NULL) { - CERROR("Can't allocate txd for GET to %s\n", - libcfs_nid2str(target.nid)); - return -ENOMEM; - } + /* is the REPLY message too small for RDMA? */ + nob = offsetof(struct kib_msg, + ibm_u.immediate.ibim_payload[msg_md->md_length]); + if (nob <= IBLND_MSG_SIZE && !gpu) + break; /* send IMMEDIATE */ - ibmsg = tx->tx_msg; rd = &ibmsg->ibm_u.get.ibgm_rd; - if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0) - 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); + tx->tx_gpu = gpu; + rc = kiblnd_setup_rd_kiov(ni, tx, rd, + msg_md->md_niov, + msg_md->md_kiov, + 0, msg_md->md_length); if (rc != 0) { CERROR("Can't setup GET sink for %s: %d\n", - libcfs_nid2str(target.nid), rc); - kiblnd_tx_done(ni, tx); + libcfs_nidstr(&target->nid), rc); + tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR; + kiblnd_tx_done(tx); return -EIO; } - nob = offsetof(kib_get_msg_t, ibgm_rd.rd_frags[rd->rd_nfrags]); + nob = offsetof(struct kib_get_msg, ibgm_rd.rd_frags[rd->rd_nfrags]); ibmsg->ibm_u.get.ibgm_cookie = tx->tx_cookie; - ibmsg->ibm_u.get.ibgm_hdr = *hdr; + lnet_hdr_to_nid4(hdr, &ibmsg->ibm_u.get.ibgm_hdr); - kiblnd_init_tx_msg(ni, tx, IBLND_MSG_GET_REQ, nob); + 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] == NULL) { - CERROR("Can't create reply for GET -> %s\n", - libcfs_nid2str(target.nid)); - kiblnd_tx_done(ni, tx); - return -EIO; - } + tx->tx_lntmsg[1] = lnet_create_reply_msg(ni, lntmsg); + if (tx->tx_lntmsg[1] == NULL) { + CERROR("Can't create reply for GET -> %s\n", + libcfs_nidstr(&target->nid)); + kiblnd_tx_done(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; + /* finalise lntmsg[0,1] on completion */ + tx->tx_lntmsg[0] = lntmsg; + tx->tx_waiting = 1; /* waiting for GET_DONE */ + kiblnd_launch_tx(ni, tx, lnet_nid_to_nid4(&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 */ + case LNET_MSG_REPLY: + case LNET_MSG_PUT: + /* Is the payload small enough not to need RDMA? */ + nob = offsetof(struct kib_msg, + ibm_u.immediate.ibim_payload[payload_nob]); + if (nob <= IBLND_MSG_SIZE && !gpu) + break; /* send IMMEDIATE */ - tx = kiblnd_get_idle_tx(ni, target.nid); - if (tx == NULL) { - CERROR("Can't allocate %s txd for %s\n", - type == LNET_MSG_PUT ? "PUT" : "REPLY", - libcfs_nid2str(target.nid)); - return -ENOMEM; - } + tx->tx_gpu = gpu; - if (payload_kiov == NULL) - 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 != 0) { - CERROR("Can't setup PUT src for %s: %d\n", - libcfs_nid2str(target.nid), rc); - kiblnd_tx_done(ni, tx); - return -EIO; - } + rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, + payload_niov, payload_kiov, + payload_offset, payload_nob); + if (rc != 0) { + CERROR("Can't setup PUT src for %s: %d\n", + libcfs_nidstr(&target->nid), rc); + kiblnd_tx_done(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)); + lnet_hdr_to_nid4(hdr, &ibmsg->ibm_u.putreq.ibprm_hdr); + ibmsg->ibm_u.putreq.ibprm_cookie = tx->tx_cookie; + kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_REQ, + sizeof(struct kib_putreq_msg)); - 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; - } + /* finalise lntmsg[0,1] on completion */ + tx->tx_lntmsg[0] = lntmsg; + tx->tx_waiting = 1; /* waiting for PUT_{ACK,NAK} */ + kiblnd_launch_tx(ni, tx, lnet_nid_to_nid4(&target->nid)); + return 0; + } - /* send IMMEDIATE */ + /* send IMMEDIATE */ + LASSERT(offsetof(struct kib_msg, ibm_u.immediate.ibim_payload[payload_nob]) + <= IBLND_MSG_SIZE); - LASSERT (offsetof(kib_msg_t, ibm_u.immediate.ibim_payload[payload_nob]) - <= IBLND_MSG_SIZE); + ibmsg = tx->tx_msg; + lnet_hdr_to_nid4(hdr, &ibmsg->ibm_u.immediate.ibim_hdr); - tx = kiblnd_get_idle_tx(ni, target.nid); - if (tx == NULL) { - CERROR ("Can't send %d to %s: tx descs exhausted\n", - type, libcfs_nid2str(target.nid)); - return -ENOMEM; - } + if (IS_FAST_REG_DEV(dev) && payload_nob) { + struct ib_rdma_wr *wrq; + int i; - ibmsg = tx->tx_msg; - ibmsg->ibm_u.immediate.ibim_hdr = *hdr; + nob = offsetof(struct kib_immediate_msg, ibim_payload[0]); + wrq = kiblnd_init_tx_msg_payload(ni, tx, IBLND_MSG_IMMEDIATE, + nob, payload_nob); - if (payload_kiov != NULL) - 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); + rd = tx->tx_rd; + rc = kiblnd_setup_rd_kiov(ni, tx, rd, + payload_niov, payload_kiov, + payload_offset, payload_nob); + if (rc != 0) { + CERROR("Can't setup IMMEDIATE src for %s: %d\n", + libcfs_nidstr(&target->nid), rc); + kiblnd_tx_done(tx); + return -EIO; + } + + /* lets generate a SGE chain */ + for (i = 0; i < rd->rd_nfrags; i++) { + kiblnd_init_tx_sge(tx, rd->rd_frags[i].rf_addr, + rd->rd_frags[i].rf_nob); + wrq->wr.num_sge++; + } + } else { + lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg, + offsetof(struct kib_msg, + ibm_u.immediate.ibim_payload), + payload_niov, payload_kiov, + payload_offset, payload_nob); - nob = offsetof(kib_immediate_msg_t, ibim_payload[payload_nob]); - kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob); + nob = offsetof(struct kib_immediate_msg, + ibim_payload[payload_nob]); - tx->tx_lntmsg[0] = lntmsg; /* finalise lntmsg on completion */ - kiblnd_launch_tx(ni, tx, target.nid); - return 0; + kiblnd_init_tx_msg(ni, tx, IBLND_MSG_IMMEDIATE, nob); + } + + /* finalise lntmsg on completion */ + tx->tx_lntmsg[0] = lntmsg; + + kiblnd_launch_tx(ni, tx, lnet_nid_to_nid4(&target->nid)); + return 0; } static void -kiblnd_reply (lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg) +kiblnd_reply(struct lnet_ni *ni, struct kib_rx *rx, struct lnet_msg *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; + struct lnet_processid *target = &lntmsg->msg_target; + unsigned int niov = lntmsg->msg_niov; + struct bio_vec *kiov = lntmsg->msg_kiov; + unsigned int offset = lntmsg->msg_offset; + unsigned int nob = lntmsg->msg_len; + struct lnet_libmd *msg_md = lntmsg->msg_md; + struct kib_tx *tx; + int rc; tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid); - if (tx == NULL) { - CERROR("Can't get tx for REPLY to %s\n", - libcfs_nid2str(target.nid)); - goto failed_0; - } + if (tx == NULL) { + CERROR("Can't get tx for REPLY to %s\n", + libcfs_nidstr(&target->nid)); + goto failed_0; + } - if (nob == 0) - rc = 0; - else if (kiov == NULL) - 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); + tx->tx_gpu = lnet_md_is_gpu(msg_md); - if (rc != 0) { - CERROR("Can't setup GET src for %s: %d\n", - libcfs_nid2str(target.nid), rc); - goto failed_1; - } + if (nob == 0) + rc = 0; + else + rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, + niov, kiov, offset, nob); - 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 == 0) { - /* 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; - } + if (rc != 0) { + CERROR("Can't setup GET src for %s: %d\n", + libcfs_nidstr(&target->nid), rc); + goto failed_1; + } - kiblnd_queue_tx(tx, rx->rx_conn); - return; + 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_nidstr(&target->nid), rc); + goto failed_1; + } + + if (nob == 0) { + /* No RDMA: local completion may happen now! */ + lnet_finalize(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: + tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR; + kiblnd_tx_done(tx); +failed_0: + lnet_finalize(lntmsg, -EIO); +} + +unsigned int +kiblnd_get_dev_prio(struct lnet_ni *ni, unsigned int dev_idx) +{ + struct kib_net *net = ni->ni_data; + struct device *dev = NULL; + + if (net) + dev = net->ibn_dev->ibd_hdev->ibh_ibdev->dma_device; + + return lnet_get_dev_prio(dev, dev_idx); - 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, +kiblnd_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg, + int delayed, unsigned int niov, struct bio_vec *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; + struct kib_rx *rx = private; + struct kib_msg *rxmsg = rx->rx_msg; + struct kib_conn *conn = rx->rx_conn; + struct kib_tx *tx; + __u64 ibprm_cookie; 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 != NULL && iov != NULL)); switch (rxmsg->ibm_type) { default: LBUG(); + /* fallthrough */ + case IBLND_MSG_IMMEDIATE: + nob = offsetof(struct kib_msg, ibm_u.immediate.ibim_payload[rlen]); + if (nob > rx->rx_nob) { + CERROR("Immediate message from %s too big: %d(%d)\n", + libcfs_nidstr(&lntmsg->msg_hdr.src_nid), + nob, rx->rx_nob); + rc = -EPROTO; + break; + } - 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 != NULL) - 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; + lnet_copy_flat2kiov(niov, kiov, offset, + IBLND_MSG_SIZE, rxmsg, + offsetof(struct kib_msg, + ibm_u.immediate.ibim_payload), + mlen); + lnet_finalize(lntmsg, 0); + break; case IBLND_MSG_PUT_REQ: { - kib_msg_t *txmsg; - kib_rdma_desc_t *rd; - - if (mlen == 0) { - lnet_finalize(ni, lntmsg, 0); - kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0, - rxmsg->ibm_u.putreq.ibprm_cookie); - break; - } + struct kib_msg *txmsg; + struct kib_rdma_desc *rd; + struct lnet_libmd *msg_md = lntmsg->msg_md; + + ibprm_cookie = rxmsg->ibm_u.putreq.ibprm_cookie; + if (mlen == 0) { + lnet_finalize(lntmsg, 0); + kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, + 0, ibprm_cookie); + break; + } tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); - if (tx == NULL) { - CERROR("Can't allocate tx for %s\n", - libcfs_nid2str(conn->ibc_peer->ibp_nid)); - /* Not replying will break the connection */ - rc = -ENOMEM; - break; - } + if (tx == NULL) { + CERROR("Can't allocate tx for %s\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid)); + /* Not replying will break the connection */ + rc = -ENOMEM; + break; + } + + tx->tx_gpu = lnet_md_is_gpu(msg_md); txmsg = tx->tx_msg; rd = &txmsg->ibm_u.putack.ibpam_rd; - if (kiov == NULL) - 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); + rc = kiblnd_setup_rd_kiov(ni, tx, rd, + niov, kiov, offset, mlen); if (rc != 0) { 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); + tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR; + kiblnd_tx_done(tx); + /* tell peer_ni it's over */ + kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, + rc, 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; + nob = offsetof(struct kib_putack_msg, ibpam_rd.rd_frags[rd->rd_nfrags]); + txmsg->ibm_u.putack.ibpam_src_cookie = ibprm_cookie; txmsg->ibm_u.putack.ibpam_dst_cookie = tx->tx_cookie; kiblnd_init_tx_msg(ni, tx, IBLND_MSG_PUT_ACK, nob); @@ -1833,18 +2042,6 @@ kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, return rc; } -int -kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name) -{ - struct task_struct *task = kthread_run(fn, arg, name); - - if (IS_ERR(task)) - return PTR_ERR(task); - - atomic_inc(&kiblnd_data.kib_nthreads); - return 0; -} - static void kiblnd_thread_fini (void) { @@ -1852,38 +2049,42 @@ kiblnd_thread_fini (void) } static void -kiblnd_peer_alive (kib_peer_t *peer) +kiblnd_peer_alive(struct kib_peer_ni *peer_ni) { - /* This is racy, but everyone's only writing cfs_time_current() */ - peer->ibp_last_alive = cfs_time_current(); + /* This is racy, but everyone's only writing ktime_get_seconds() */ + peer_ni->ibp_last_alive = ktime_get_seconds(); smp_mb(); } static void -kiblnd_peer_notify (kib_peer_t *peer) +kiblnd_peer_notify(struct kib_peer_ni *peer_ni) { - int error = 0; - cfs_time_t last_alive = 0; - unsigned long flags; + int error = 0; + time64_t last_alive = 0; + unsigned long flags; read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); - if (kiblnd_peer_idle(peer) && peer->ibp_error != 0) { - error = peer->ibp_error; - peer->ibp_error = 0; + if (kiblnd_peer_idle(peer_ni) && peer_ni->ibp_error != 0) { + error = peer_ni->ibp_error; + peer_ni->ibp_error = 0; - last_alive = peer->ibp_last_alive; - } + last_alive = peer_ni->ibp_last_alive; + } read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - if (error != 0) - lnet_notify(peer->ibp_ni, - peer->ibp_nid, 0, last_alive); + if (error != 0) { + struct lnet_nid nid; + + lnet_nid4_to_nid(peer_ni->ibp_nid, &nid); + lnet_notify(peer_ni->ibp_ni, &nid, + false, false, last_alive); + } } void -kiblnd_close_conn_locked (kib_conn_t *conn, int error) +kiblnd_close_conn_locked(struct kib_conn *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 @@ -1891,9 +2092,9 @@ kiblnd_close_conn_locked (kib_conn_t *conn, int error) * 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; + struct kib_peer_ni *peer_ni = conn->ibc_peer; + struct kib_dev *dev; + unsigned long flags; LASSERT (error != 0 || conn->ibc_state >= IBLND_CONN_ESTABLISHED); @@ -1908,31 +2109,36 @@ kiblnd_close_conn_locked (kib_conn_t *conn, int error) 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) ? + list_empty(&conn->ibc_active_txs)) + CDEBUG(D_NET, "closing conn %p to %s\n", + conn, + libcfs_nid2str(peer_ni->ibp_nid)); + else + CNETERR("Closing conn %p to %s: error %d%s%s%s%s%s\n", + conn, + libcfs_nid2str(peer_ni->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_empty(&conn->ibc_tx_queue_nocred) ? + "" : "(sending_nocred)", + list_empty(&conn->ibc_active_txs) ? "" : "(waiting)"); + + dev = ((struct kib_net *)peer_ni->ibp_ni->ni_data)->ibn_dev; + if (peer_ni->ibp_next_conn == conn) + /* clear next_conn so it won't be used */ + peer_ni->ibp_next_conn = NULL; list_del(&conn->ibc_list); - /* connd (see below) takes over ibc_list's ref */ + /* 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); + if (list_empty(&peer_ni->ibp_conns) && /* no more conns */ + kiblnd_peer_active(peer_ni)) { /* still in peer_ni table */ + kiblnd_unlink_peer_locked(peer_ni); /* set/clear error on last conn */ - peer->ibp_error = conn->ibc_comms_error; + peer_ni->ibp_error = conn->ibc_comms_error; } kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING); @@ -1953,7 +2159,7 @@ kiblnd_close_conn_locked (kib_conn_t *conn, int error) } void -kiblnd_close_conn(kib_conn_t *conn, int error) +kiblnd_close_conn(struct kib_conn *conn, int error) { unsigned long flags; @@ -1965,18 +2171,18 @@ kiblnd_close_conn(kib_conn_t *conn, int error) } static void -kiblnd_handle_early_rxs(kib_conn_t *conn) +kiblnd_handle_early_rxs(struct kib_conn *conn) { - unsigned long flags; - kib_rx_t *rx; + unsigned long flags; + struct kib_rx *rx; LASSERT(!in_interrupt()); LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED); write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); - while (!list_empty(&conn->ibc_early_rxs)) { - rx = list_entry(conn->ibc_early_rxs.next, - kib_rx_t, rx_list); + while ((rx = list_first_entry_or_null(&conn->ibc_early_rxs, + struct kib_rx, + rx_list)) != NULL) { list_del(&rx->rx_list); write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); @@ -1987,58 +2193,113 @@ kiblnd_handle_early_rxs(kib_conn_t *conn) write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); } -static void -kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs) +void +kiblnd_abort_txs(struct kib_conn *conn, struct list_head *txs) { - struct list_head zombies = LIST_HEAD_INIT(zombies); - struct list_head *tmp; - struct list_head *nxt; - kib_tx_t *tx; + LIST_HEAD(zombies); + struct kib_tx *nxt; + struct kib_tx *tx; spin_lock(&conn->ibc_lock); - list_for_each_safe(tmp, nxt, txs) { - tx = list_entry(tmp, kib_tx_t, tx_list); - + list_for_each_entry_safe(tx, nxt, txs, tx_list) { if (txs == &conn->ibc_active_txs) { LASSERT(!tx->tx_queued); LASSERT(tx->tx_waiting || tx->tx_sending != 0); + if (conn->ibc_comms_error == -ETIMEDOUT) { + if (tx->tx_waiting && !tx->tx_sending) + tx->tx_hstatus = + LNET_MSG_STATUS_REMOTE_TIMEOUT; + else if (tx->tx_sending) + tx->tx_hstatus = + LNET_MSG_STATUS_NETWORK_TIMEOUT; + } } else { LASSERT(tx->tx_queued); + if (conn->ibc_comms_error == -ETIMEDOUT) + tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_TIMEOUT; + else + tx->tx_hstatus = LNET_MSG_STATUS_LOCAL_ERROR; } tx->tx_status = -ECONNABORTED; tx->tx_waiting = 0; + /* + * TODO: This makes an assumption that + * kiblnd_tx_complete() will be called for each tx. If + * that event is dropped we could end up with stale + * connections floating around. We'd like to deal with + * that in a better way. + * + * Also that means we can exceed the timeout by many + * seconds. + */ if (tx->tx_sending == 0) { tx->tx_queued = 0; - list_del(&tx->tx_list); - list_add(&tx->tx_list, &zombies); + list_move(&tx->tx_list, &zombies); + } else { + /* keep tx until cq destroy */ + list_move(&tx->tx_list, &conn->ibc_zombie_txs); + conn->ibc_waits ++; } } spin_unlock(&conn->ibc_lock); - kiblnd_txlist_done(conn->ibc_peer->ibp_ni, &zombies, -ECONNABORTED); + /* + * aborting transmits occurs when finalizing the connection. + * The connection is finalized on error. + * Passing LNET_MSG_STATUS_OK to txlist_done() will not + * override the value already set in tx->tx_hstatus above. + */ + kiblnd_txlist_done(&zombies, -ECONNABORTED, LNET_MSG_STATUS_OK); +} + +static bool +kiblnd_tx_may_discard(struct kib_conn *conn) +{ + bool rc = false; + struct kib_tx *nxt; + struct kib_tx *tx; + + spin_lock(&conn->ibc_lock); + + list_for_each_entry_safe(tx, nxt, &conn->ibc_zombie_txs, tx_list) { + if (tx->tx_sending > 0 && tx->tx_lntmsg[0] && + lnet_md_discarded(tx->tx_lntmsg[0]->msg_md)) { + tx->tx_sending --; + if (tx->tx_sending == 0) { + kiblnd_conn_decref(tx->tx_conn); + tx->tx_conn = NULL; + rc = true; + } + } + } + + spin_unlock(&conn->ibc_lock); + return rc; } static void -kiblnd_finalise_conn (kib_conn_t *conn) +kiblnd_finalise_conn(struct kib_conn *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); + kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED); + /* Complete all tx descs not waiting for sends to complete. * NB we should be safe from RDMA now that the QP has changed state */ + CDEBUG(D_NET, "abort connection with %s\n", libcfs_nid2str(conn->ibc_peer->ibp_nid)); + 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); @@ -2049,172 +2310,188 @@ kiblnd_finalise_conn (kib_conn_t *conn) } static void -kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error) +kiblnd_peer_connect_failed(struct kib_peer_ni *peer_ni, int active, + int error) { - struct list_head zombies = LIST_HEAD_INIT(zombies); - unsigned long flags; + LIST_HEAD(zombies); + unsigned long flags; + enum lnet_msg_hstatus hstatus; - LASSERT (error != 0); - LASSERT (!in_interrupt()); + LASSERT(error != 0); + LASSERT(!in_interrupt()); write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); if (active) { - LASSERT (peer->ibp_connecting > 0); - peer->ibp_connecting--; + LASSERT(peer_ni->ibp_connecting > 0); + peer_ni->ibp_connecting--; } else { - LASSERT (peer->ibp_accepting > 0); - peer->ibp_accepting--; + LASSERT (peer_ni->ibp_accepting > 0); + peer_ni->ibp_accepting--; } - if (kiblnd_peer_connecting(peer)) { + if (kiblnd_peer_connecting(peer_ni)) { /* another connection attempt under way... */ write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); return; } - peer->ibp_reconnected = 0; - 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); + peer_ni->ibp_reconnected = 0; + if (list_empty(&peer_ni->ibp_conns)) { + /* Take peer_ni's blocked transmits to complete with error */ + list_splice_init(&peer_ni->ibp_tx_queue, &zombies); - if (kiblnd_peer_active(peer)) - kiblnd_unlink_peer_locked(peer); + if (kiblnd_peer_active(peer_ni)) + kiblnd_unlink_peer_locked(peer_ni); - peer->ibp_error = error; + peer_ni->ibp_error = error; } else { /* Can't have blocked transmits if there are connections */ - LASSERT(list_empty(&peer->ibp_tx_queue)); + LASSERT(list_empty(&peer_ni->ibp_tx_queue)); } write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - kiblnd_peer_notify(peer); + kiblnd_peer_notify(peer_ni); if (list_empty(&zombies)) return; CNETERR("Deleting messages for %s: connection failed\n", - libcfs_nid2str(peer->ibp_nid)); + libcfs_nid2str(peer_ni->ibp_nid)); - kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH); + switch (error) { + case -EHOSTUNREACH: + case -ETIMEDOUT: + hstatus = LNET_MSG_STATUS_NETWORK_TIMEOUT; + break; + case -ECONNREFUSED: + hstatus = LNET_MSG_STATUS_REMOTE_DROPPED; + break; + default: + hstatus = LNET_MSG_STATUS_LOCAL_DROPPED; + break; + } + + kiblnd_txlist_done(&zombies, error, hstatus); } static void -kiblnd_connreq_done(kib_conn_t *conn, int status) +kiblnd_connreq_done(struct kib_conn *conn, int status) { - kib_peer_t *peer = conn->ibc_peer; - kib_tx_t *tx; - struct list_head txs; + struct kib_peer_ni *peer_ni = conn->ibc_peer; + struct kib_tx *tx; + 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, + libcfs_nid2str(peer_ni->ibp_nid), active, conn->ibc_version, status); LASSERT (!in_interrupt()); LASSERT ((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT && - peer->ibp_connecting > 0) || + peer_ni->ibp_connecting > 0) || (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT && - peer->ibp_accepting > 0)); + peer_ni->ibp_accepting > 0)); - LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); - conn->ibc_connvars = NULL; + LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); + conn->ibc_connvars = NULL; - if (status != 0) { - /* failed to establish connection */ - kiblnd_peer_connect_failed(peer, active, status); - kiblnd_finalise_conn(conn); - return; - } + if (status != 0) { + /* failed to establish connection */ + kiblnd_peer_connect_failed(peer_ni, active, status); + kiblnd_finalise_conn(conn); + return; + } - /* connection established */ + /* 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); + conn->ibc_last_send = ktime_get(); + kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED); + kiblnd_peer_alive(peer_ni); - /* Add conn to peer's list and nuke any dangling conns from a different - * peer instance... */ + /* Add conn to peer_ni's list and nuke any dangling conns from a different + * peer_ni instance... */ kiblnd_conn_addref(conn); /* +1 ref for ibc_list */ - list_add(&conn->ibc_list, &peer->ibp_conns); - peer->ibp_reconnected = 0; + list_add(&conn->ibc_list, &peer_ni->ibp_conns); + peer_ni->ibp_reconnected = 0; if (active) - peer->ibp_connecting--; + peer_ni->ibp_connecting--; else - peer->ibp_accepting--; + peer_ni->ibp_accepting--; - if (peer->ibp_version == 0) { - peer->ibp_version = conn->ibc_version; - peer->ibp_incarnation = conn->ibc_incarnation; + if (peer_ni->ibp_version == 0) { + peer_ni->ibp_version = conn->ibc_version; + peer_ni->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, + if (peer_ni->ibp_version != conn->ibc_version || + peer_ni->ibp_incarnation != conn->ibc_incarnation) { + kiblnd_close_stale_conns_locked(peer_ni, conn->ibc_version, conn->ibc_incarnation); - peer->ibp_version = conn->ibc_version; - peer->ibp_incarnation = conn->ibc_incarnation; + peer_ni->ibp_version = conn->ibc_version; + peer_ni->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); + list_splice_init(&peer_ni->ibp_tx_queue, &txs); - if (!kiblnd_peer_active(peer) || /* peer has been deleted */ + if (!kiblnd_peer_active(peer_ni) || /* peer_ni has been deleted */ conn->ibc_comms_error != 0) { /* 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); + kiblnd_txlist_done(&txs, -ECONNABORTED, + LNET_MSG_STATUS_LOCAL_ERROR); 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. + /* +1 ref for myself, this connection is visible to other threads + * now, refcount of peer:ibp_conns can be released by connection + * close from either a different thread, or the calling of + * kiblnd_check_sends_locked() below. See bz21911 for details. */ kiblnd_conn_addref(conn); write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - /* Schedule blocked txs */ + /* Schedule blocked txs + * Note: if we are running with conns_per_peer > 1, these blocked + * txs will all get scheduled to the first connection which gets + * scheduled. We won't be using round robin on this first batch. + */ spin_lock(&conn->ibc_lock); - while (!list_empty(&txs)) { - tx = list_entry(txs.next, kib_tx_t, tx_list); + while ((tx = list_first_entry_or_null(&txs, struct kib_tx, + tx_list)) != NULL) { list_del(&tx->tx_list); kiblnd_queue_tx_locked(tx, conn); } + kiblnd_check_sends_locked(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) +kiblnd_reject(struct rdma_cm_id *cmid, struct kib_rej *rej) { int rc; +#ifdef HAVE_OFED_RDMA_REJECT_4ARGS + rc = rdma_reject(cmid, rej, sizeof(*rej), IB_CM_REJ_CONSUMER_DEFINED); +#else rc = rdma_reject(cmid, rej, sizeof(*rej)); +#endif if (rc != 0) CWARN("Error %d sending reject\n", rc); @@ -2223,116 +2500,141 @@ kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej) 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()); + rwlock_t *g_lock = &kiblnd_data.kib_global_lock; + struct kib_msg *reqmsg = priv; + struct kib_msg *ackmsg; + struct kib_dev *ibdev; + struct kib_peer_ni *peer_ni; + struct kib_peer_ni *peer2; + struct kib_conn *conn; + struct lnet_ni *ni = NULL; + struct kib_net *net = NULL; + struct lnet_nid destnid; + lnet_nid_t nid; + struct rdma_conn_param cp; + struct kib_rej 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 != NULL); + ibdev = 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; + 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) { + 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", + CERROR("peer_ni's port (%pI4h:%hu) is not privileged\n", &ip, ntohs(peer_addr->sin_port)); - goto failed; - } + goto failed; + } - if (priv_nob < offsetof(kib_msg_t, ibm_type)) { - CERROR("Short connection request\n"); - goto failed; - } + if (priv_nob < offsetof(struct kib_msg, 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; + /* 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_ni 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 != 0) { - CERROR("Can't parse connection request: %d\n", rc); - goto failed; - } + rc = kiblnd_unpack_msg(reqmsg, priv_nob); + if (rc != 0) { + CERROR("Can't parse connection request: %d\n", rc); + goto failed; + } - nid = reqmsg->ibm_srcnid; - ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid)); + nid = reqmsg->ibm_srcnid; + lnet_nid4_to_nid(reqmsg->ibm_dstnid, &destnid); + ni = lnet_nid_to_ni_addref(&destnid); - if (ni != NULL) { - net = (kib_net_t *)ni->ni_data; - rej.ibr_incarnation = net->ibn_incarnation; - } + if (ni != NULL) { + net = (struct kib_net *)ni->ni_data; + rej.ibr_incarnation = net->ibn_incarnation; + } else { + if (ibdev->ibd_nnets == 0) { + rej.ibr_why = IBLND_REJECT_EARLY; + CNETERR("Can't accept conn from %s (%s:%d:%pI4h): net for nid %s not added yet\n", + libcfs_nid2str(nid), + ibdev->ibd_ifname, ibdev->ibd_nnets, + &ibdev->ibd_ifip, + libcfs_nid2str(reqmsg->ibm_dstnid)); + goto failed; + } + list_for_each_entry(net, &ibdev->ibd_nets, ibn_list) { + if ((net->ibn_dev == ibdev) && + (net->ibn_ni != NULL) && + (net->ibn_ni->ni_state != LNET_NI_STATE_ACTIVE)) { + rej.ibr_why = IBLND_REJECT_EARLY; + CNETERR("Can't accept conn from %s on %s (%s:%d:%pI4h): nid %s not ready\n", + libcfs_nid2str(nid), + libcfs_nidstr(&net->ibn_ni->ni_nid), + ibdev->ibd_ifname, ibdev->ibd_nnets, + &ibdev->ibd_ifip, + libcfs_nid2str(reqmsg->ibm_dstnid)); + goto failed; + } + } + } - if (ni == NULL || /* 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 == NULL ? "NA" : libcfs_nid2str(ni->ni_nid), - ibdev->ibd_ifname, ibdev->ibd_nnets, - &ibdev->ibd_ifip, - libcfs_nid2str(reqmsg->ibm_dstnid)); + if (ni == NULL || /* no matching net */ + !nid_same(&ni->ni_nid, &destnid) || /* 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 ? libcfs_nidstr(&ni->ni_nid) : "NA", + ibdev->ibd_ifname, ibdev->ibd_nnets, + &ibdev->ibd_ifip, + libcfs_nid2str(reqmsg->ibm_dstnid)); - goto failed; - } + goto failed; + } - /* check time stamp as soon as possible */ - if (reqmsg->ibm_dststamp != 0 && - reqmsg->ibm_dststamp != net->ibn_incarnation) { - CWARN("Stale connection request\n"); - rej.ibr_why = IBLND_REJECT_CONN_STALE; - goto failed; - } + /* check time stamp as soon as possible */ + if (reqmsg->ibm_dststamp != 0 && + 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; + /* I can accept peer_ni'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_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", + kiblnd_msg_queue_size(version, ni)) { + 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)); + kiblnd_msg_queue_size(version, ni)); if (version == IBLND_MSG_VERSION) rej.ibr_why = IBLND_REJECT_MSG_QUEUE_SIZE; @@ -2341,64 +2643,62 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) } 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)); + IBLND_MAX_RDMA_FRAGS) { + 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_MAX_RDMA_FRAGS); 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 == NULL) { - CWARN("Can't accept conn from %s (version %x): " - "max_frags %d incompatible without FMR pool " - "(%d wanted)\n", + IBLND_MAX_RDMA_FRAGS && + net->ibn_fmr_ps == NULL) { + 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)); + IBLND_MAX_RDMA_FRAGS); - if (version >= IBLND_MSG_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; - } + 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); + /* assume 'nid' is a new peer_ni; create */ + rc = kiblnd_create_peer(ni, &peer_ni, nid); if (rc != 0) { - CERROR("Can't create peer for %s\n", libcfs_nid2str(nid)); + CERROR("Can't create peer_ni 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; + peer_ni->ibp_max_frags = reqmsg->ibm_u.connparams.ibcp_max_frags; + peer_ni->ibp_queue_depth = reqmsg->ibm_u.connparams.ibcp_queue_depth; write_lock_irqsave(g_lock, flags); - peer2 = kiblnd_find_peer_locked(nid); - if (peer2 != NULL) { - if (peer2->ibp_version == 0) { - peer2->ibp_version = version; - peer2->ibp_incarnation = reqmsg->ibm_srcstamp; - } + peer2 = kiblnd_find_peer_locked(ni, nid); + if (peer2 != NULL) { + if (peer2->ibp_version == 0) { + 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) { + /* 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); if (kiblnd_peer_active(peer2)) { @@ -2407,132 +2707,150 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) } write_unlock_irqrestore(g_lock, flags); - CWARN("Conn stale %s version %x/%x incarnation "LPU64"/"LPU64"\n", + CWARN("Conn stale %s version %x/%x incarnation %llu/%llu\n", libcfs_nid2str(nid), peer2->ibp_version, version, peer2->ibp_incarnation, reqmsg->ibm_srcstamp); - kiblnd_peer_decref(peer); - rej.ibr_why = IBLND_REJECT_CONN_STALE; - goto failed; - } + kiblnd_peer_decref(peer_ni); + rej.ibr_why = IBLND_REJECT_CONN_STALE; + goto failed; + } - /* tie-break connection race in favour of the higher NID */ - if (peer2->ibp_connecting != 0 && - nid < ni->ni_nid) { + /* Tie-break connection race in favour of the higher NID. + * If we keep running into a race condition multiple times, + * we have to assume that the connection attempt with the + * higher NID is stuck in a connecting state and will never + * recover. As such, we pass through this if-block and let + * the lower NID connection win so we can move forward. + */ + if (peer2->ibp_connecting != 0 && + nid < lnet_nid_to_nid4(&ni->ni_nid) && + peer2->ibp_races < MAX_CONN_RACES_BEFORE_ABORT) { + peer2->ibp_races++; write_unlock_irqrestore(g_lock, flags); - CWARN("Conn race %s\n", libcfs_nid2str(peer2->ibp_nid)); + CDEBUG(D_NET, "Conn race %s\n", + libcfs_nid2str(peer2->ibp_nid)); - kiblnd_peer_decref(peer); - rej.ibr_why = IBLND_REJECT_CONN_RACE; - goto failed; - } + kiblnd_peer_decref(peer_ni); + rej.ibr_why = IBLND_REJECT_CONN_RACE; + goto failed; + } + if (peer2->ibp_races >= MAX_CONN_RACES_BEFORE_ABORT) + CNETERR("Conn race %s: unresolved after %d attempts, letting lower NID win\n", + libcfs_nid2str(peer2->ibp_nid), + MAX_CONN_RACES_BEFORE_ABORT); /* - * passive connection is allowed even this peer is waiting for + * passive connection is allowed even this peer_ni is waiting for * reconnection. */ peer2->ibp_reconnecting = 0; - peer2->ibp_accepting++; - kiblnd_peer_addref(peer2); + peer2->ibp_races = 0; + peer2->ibp_accepting++; + kiblnd_peer_addref(peer2); - /* Race with kiblnd_launch_tx (active connect) to create peer + /* Race with kiblnd_launch_tx (active connect) to create peer_ni * 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; + * peer_ni's limits are */ + peer2->ibp_max_frags = peer_ni->ibp_max_frags; + peer2->ibp_queue_depth = peer_ni->ibp_queue_depth; write_unlock_irqrestore(g_lock, flags); - kiblnd_peer_decref(peer); - peer = peer2; - } else { - /* Brand new peer */ - LASSERT (peer->ibp_accepting == 0); - LASSERT (peer->ibp_version == 0 && - peer->ibp_incarnation == 0); + kiblnd_peer_decref(peer_ni); + peer_ni = peer2; + } else { + /* Brand new peer_ni */ + LASSERT(peer_ni->ibp_accepting == 0); + LASSERT(peer_ni->ibp_version == 0 && + peer_ni->ibp_incarnation == 0); - peer->ibp_accepting = 1; - peer->ibp_version = version; - peer->ibp_incarnation = reqmsg->ibm_srcstamp; + peer_ni->ibp_accepting = 1; + peer_ni->ibp_version = version; + peer_ni->ibp_incarnation = reqmsg->ibm_srcstamp; - /* I have a ref on ni that prevents it being shutdown */ - LASSERT (net->ibn_shutdown == 0); + /* I have a ref on ni that prevents it being shutdown */ + LASSERT(net->ibn_shutdown == 0); - kiblnd_peer_addref(peer); - list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); + kiblnd_peer_addref(peer_ni); + hash_add(kiblnd_data.kib_peers, &peer_ni->ibp_list, nid); write_unlock_irqrestore(g_lock, flags); - } + } - conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, version); - if (conn == NULL) { - kiblnd_peer_connect_failed(peer, 0, -ENOMEM); - kiblnd_peer_decref(peer); - rej.ibr_why = IBLND_REJECT_NO_RESOURCES; - goto failed; - } + conn = kiblnd_create_conn(peer_ni, cmid, IBLND_CONN_PASSIVE_WAIT, + version); + if (!conn) { + kiblnd_peer_connect_failed(peer_ni, 0, -ENOMEM); + kiblnd_peer_decref(peer_ni); + 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 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)); + ackmsg = &conn->ibc_connvars->cv_msg; + memset(ackmsg, 0, sizeof(*ackmsg)); - kiblnd_init_msg(ackmsg, IBLND_MSG_CONNACK, - sizeof(ackmsg->ibm_u.connparams)); + 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); + 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; + 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)); + CDEBUG(D_NET, "Accept %s conn %p\n", libcfs_nid2str(nid), conn); - rc = rdma_accept(cmid, &cp); - if (rc != 0) { - CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid), rc); - rej.ibr_version = version; - rej.ibr_why = IBLND_REJECT_FATAL; + rc = rdma_accept(cmid, &cp); + if (rc != 0) { + CNETERR("Can't accept %s: %d cm_id %p\n", libcfs_nid2str(nid), rc, cmid); + rej.ibr_version = version; + rej.ibr_why = IBLND_REJECT_FATAL; - kiblnd_reject(cmid, &rej); - kiblnd_connreq_done(conn, rc); - kiblnd_conn_decref(conn); - } + kiblnd_reject(cmid, &rej); + kiblnd_connreq_done(conn, rc); + kiblnd_conn_decref(conn); + } - lnet_ni_decref(ni); - return 0; + lnet_ni_decref(ni); + return 0; failed: - if (ni != NULL) - lnet_ni_decref(ni); + if (ni != NULL) { + rej.ibr_cp.ibcp_queue_depth = + kiblnd_msg_queue_size(version, ni); + rej.ibr_cp.ibcp_max_frags = IBLND_MAX_RDMA_FRAGS; + 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); + rej.ibr_version = version; + kiblnd_reject(cmid, &rej); - return -ECONNREFUSED; + return -ECONNREFUSED; } static void -kiblnd_check_reconnect(kib_conn_t *conn, int version, - __u64 incarnation, int why, kib_connparams_t *cp) +kiblnd_check_reconnect(struct kib_conn *conn, int version, + u64 incarnation, int why, struct kib_connparams *cp) { rwlock_t *glock = &kiblnd_data.kib_global_lock; - kib_peer_t *peer = conn->ibc_peer; + struct kib_peer_ni *peer_ni = conn->ibc_peer; char *reason; int msg_size = IBLND_MSG_SIZE; int frag_num = -1; @@ -2541,8 +2859,7 @@ kiblnd_check_reconnect(kib_conn_t *conn, int version, unsigned long flags; LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); - LASSERT(peer->ibp_connecting > 0); /* 'conn' at least */ - LASSERT(!peer->ibp_reconnecting); + LASSERT(peer_ni->ibp_connecting > 0); /* 'conn' at least */ if (cp) { msg_size = cp->ibcp_max_msg_size; @@ -2551,43 +2868,41 @@ kiblnd_check_reconnect(kib_conn_t *conn, int version, } write_lock_irqsave(glock, 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() */ - reconnect = (!list_empty(&peer->ibp_tx_queue) || - peer->ibp_version != version) && - peer->ibp_connecting == 1 && - peer->ibp_accepting == 0; + /* 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. + */ + reconnect = (!list_empty(&peer_ni->ibp_tx_queue) || + peer_ni->ibp_version != version) && + peer_ni->ibp_connecting && + peer_ni->ibp_accepting == 0; if (!reconnect) { reason = "no need"; goto out; } - switch (why) { - default: - reason = "Unknown"; - break; + switch (why) { + default: + reason = "Unknown"; + break; - case IBLND_REJECT_RDMA_FRAGS: + case IBLND_REJECT_RDMA_FRAGS: { if (!cp) { reason = "can't negotiate max frags"; goto out; } - if (*kiblnd_tunables.kib_map_on_demand == 0) { - reason = "map_on_demand must be enabled"; - goto out; - } + if (conn->ibc_max_frags <= frag_num) { reason = "unsupported max frags"; goto out; } - peer->ibp_max_frags = frag_num; + peer_ni->ibp_max_frags = frag_num; reason = "rdma fragments"; break; - + } case IBLND_REJECT_MSG_QUEUE_SIZE: if (!cp) { reason = "can't negotiate queue depth"; @@ -2598,7 +2913,7 @@ kiblnd_check_reconnect(kib_conn_t *conn, int version, goto out; } - peer->ibp_queue_depth = queue_dep; + peer_ni->ibp_queue_depth = queue_dep; reason = "queue depth"; break; @@ -2616,29 +2931,30 @@ kiblnd_check_reconnect(kib_conn_t *conn, int version, } conn->ibc_reconnect = 1; - peer->ibp_reconnecting = 1; - peer->ibp_version = version; + peer_ni->ibp_reconnecting++; + peer_ni->ibp_version = version; if (incarnation != 0) - peer->ibp_incarnation = incarnation; + peer_ni->ibp_incarnation = incarnation; out: write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); CNETERR("%s: %s (%s), %x, %x, msg_size: %d, queue_depth: %d/%d, max_frags: %d/%d\n", - libcfs_nid2str(peer->ibp_nid), + libcfs_nid2str(peer_ni->ibp_nid), reconnect ? "reconnect" : "don't reconnect", reason, IBLND_MSG_VERSION, version, msg_size, conn->ibc_queue_depth, queue_dep, conn->ibc_max_frags, frag_num); /* - * if conn::ibc_reconnect is TRUE, connd will reconnect to the peer + * if conn::ibc_reconnect is TRUE, connd will reconnect to the peer_ni * while destroying the zombie */ } static void -kiblnd_rejected (kib_conn_t *conn, int reason, void *priv, int priv_nob) +kiblnd_rejected(struct kib_conn *conn, int reason, void *priv, int priv_nob) { - kib_peer_t *peer = conn->ibc_peer; + struct kib_peer_ni *peer_ni = conn->ibc_peer; + int status = -ECONNREFUSED; LASSERT (!in_interrupt()); LASSERT (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); @@ -2649,124 +2965,133 @@ kiblnd_rejected (kib_conn_t *conn, int reason, void *priv, int priv_nob) 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_INVALID_SERVICE_ID: + status = -EHOSTUNREACH; + CNETERR("%s rejected: no listener at %d\n", + libcfs_nid2str(peer_ni->ibp_nid), + *kiblnd_tunables.kib_service); + break; + + case IB_CM_REJ_CONSUMER_DEFINED: + if (priv_nob >= offsetof(struct kib_rej, ibr_padding)) { + struct kib_rej *rej = priv; + struct kib_connparams *cp = NULL; + bool flip = false; + __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_ni 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 = true; + } + + if (priv_nob >= sizeof(struct kib_rej) && + 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_ni->ibp_nid)); + 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: + 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_ni->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_ni %s: %x\n", + libcfs_nid2str(peer_ni->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_check_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; - } + incarnation, + rej->ibr_why, cp); + break; + + case IBLND_REJECT_NO_RESOURCES: + CERROR("%s rejected: o2iblnd no resources\n", + libcfs_nid2str(peer_ni->ibp_nid)); + break; + + case IBLND_REJECT_FATAL: + CERROR("%s rejected: o2iblnd fatal error\n", + libcfs_nid2str(peer_ni->ibp_nid)); + break; - kiblnd_connreq_done(conn, -ECONNREFUSED); + case IBLND_REJECT_EARLY: + CNETERR("%s rejected: tried too early\n", + libcfs_nid2str(peer_ni->ibp_nid)); + break; + + default: + CERROR("%s rejected: o2iblnd reason %d\n", + libcfs_nid2str(peer_ni->ibp_nid), + rej->ibr_why); + break; + } + break; + } + fallthrough; + default: + CNETERR("%s rejected: reason %d, size %d\n", + libcfs_nid2str(peer_ni->ibp_nid), reason, priv_nob); + break; + } + + kiblnd_connreq_done(conn, status); } static void -kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) +kiblnd_check_connreply(struct kib_conn *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; + struct kib_peer_ni *peer_ni = conn->ibc_peer; + struct lnet_ni *ni = peer_ni->ibp_ni; + struct kib_net *net = ni->ni_data; + struct kib_msg *msg = priv; int ver = conn->ibc_version; int rc = kiblnd_unpack_msg(msg, priv_nob); unsigned long flags; @@ -2775,13 +3100,13 @@ kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) if (rc != 0) { CERROR("Can't unpack connack from %s: %d\n", - libcfs_nid2str(peer->ibp_nid), rc); + libcfs_nid2str(peer_ni->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)); + msg->ibm_type, libcfs_nid2str(peer_ni->ibp_nid)); rc = -EPROTO; goto failed; } @@ -2789,7 +3114,7 @@ kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) 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); + libcfs_nid2str(peer_ni->ibp_nid), msg->ibm_version, ver); rc = -EPROTO; goto failed; } @@ -2797,7 +3122,7 @@ kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) 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), + libcfs_nid2str(peer_ni->ibp_nid), msg->ibm_u.connparams.ibcp_queue_depth, conn->ibc_queue_depth); rc = -EPROTO; @@ -2807,7 +3132,7 @@ kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) 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), + libcfs_nid2str(peer_ni->ibp_nid), msg->ibm_u.connparams.ibcp_max_frags, conn->ibc_max_frags); rc = -EPROTO; @@ -2816,7 +3141,7 @@ kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) 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), + libcfs_nid2str(peer_ni->ibp_nid), msg->ibm_u.connparams.ibcp_max_msg_size, IBLND_MSG_SIZE); rc = -EPROTO; @@ -2824,7 +3149,7 @@ kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) } read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); - if (msg->ibm_dstnid == ni->ni_nid && + if (msg->ibm_dstnid == lnet_nid_to_nid4(&ni->ni_nid) && msg->ibm_dststamp == net->ibn_incarnation) rc = 0; else @@ -2834,7 +3159,7 @@ kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) if (rc != 0) { CERROR("Bad connection reply from %s, rc = %d, " "version: %x max_frags: %d\n", - libcfs_nid2str(peer->ibp_nid), rc, + libcfs_nid2str(peer_ni->ibp_nid), rc, msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags); goto failed; } @@ -2862,12 +3187,12 @@ kiblnd_check_connreply (kib_conn_t *conn, void *priv, int priv_nob) } static int -kiblnd_active_connect (struct rdma_cm_id *cmid) +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; + struct kib_peer_ni *peer_ni = cmid->context; + struct kib_conn *conn; + struct kib_msg *msg; + struct rdma_conn_param cp; int version; __u64 incarnation; unsigned long flags; @@ -2875,23 +3200,23 @@ kiblnd_active_connect (struct rdma_cm_id *cmid) read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); - incarnation = peer->ibp_incarnation; - version = (peer->ibp_version == 0) ? IBLND_MSG_VERSION : - peer->ibp_version; + incarnation = peer_ni->ibp_incarnation; + version = (peer_ni->ibp_version == 0) ? IBLND_MSG_VERSION : + peer_ni->ibp_version; read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT, + conn = kiblnd_create_conn(peer_ni, cmid, IBLND_CONN_ACTIVE_CONNECT, version); if (conn == NULL) { - kiblnd_peer_connect_failed(peer, 1, -ENOMEM); - kiblnd_peer_decref(peer); /* lose cmid's ref */ + kiblnd_peer_connect_failed(peer_ni, 1, -ENOMEM); + kiblnd_peer_decref(peer_ni); /* 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 */ + * on peer_ni */ msg = &conn->ibc_connvars->cv_msg; @@ -2901,8 +3226,8 @@ kiblnd_active_connect (struct rdma_cm_id *cmid) 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); + kiblnd_pack_msg(peer_ni->ibp_ni, msg, version, + 0, peer_ni->ibp_nid, incarnation); memset(&cp, 0, sizeof(cp)); cp.private_data = msg; @@ -2915,24 +3240,40 @@ kiblnd_active_connect (struct rdma_cm_id *cmid) LASSERT(cmid->context == (void *)conn); LASSERT(conn->ibc_cmid == cmid); - - rc = rdma_connect(cmid, &cp); + rc = rdma_connect_locked(cmid, &cp); if (rc != 0) { - CERROR("Can't connect to %s: %d\n", - libcfs_nid2str(peer->ibp_nid), rc); + CNETERR("Can't connect to %s: %d cm_id %p\n", + libcfs_nid2str(peer_ni->ibp_nid), rc, cmid); kiblnd_connreq_done(conn, rc); kiblnd_conn_decref(conn); - } + } else { + CDEBUG(D_NET, "Connected to %s: cm_id %p\n", + libcfs_nid2str(peer_ni->ibp_nid), cmid); + } return 0; } +/* set the IP ToS ("Type of Service") used by the RoCE QoS */ +static void +kiblnd_set_tos(struct rdma_cm_id *cmid) +{ + struct kib_peer_ni *peer_ni = cmid->context; + struct lnet_ioctl_config_o2iblnd_tunables *t; + + t = &peer_ni->ibp_ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib; + if (t->lnd_tos < 0) + return; + + rdma_set_service_type(cmid, t->lnd_tos); +} + int kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) { - kib_peer_t *peer; - kib_conn_t *conn; - int rc; + struct kib_peer_ni *peer_ni; + struct kib_conn *conn; + int rc; switch (event->event) { default: @@ -2942,95 +3283,113 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) case RDMA_CM_EVENT_CONNECT_REQUEST: /* destroy cmid on failure */ - rc = kiblnd_passive_connect(cmid, + rc = kiblnd_passive_connect(cmid, (void *)KIBLND_CONN_PARAM(event), KIBLND_CONN_PARAM_LEN(event)); - CDEBUG(D_NET, "connreq: %d\n", rc); + CDEBUG(D_NET, "connreq: %d cm_id %p\n", rc, cmid); 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); + peer_ni = cmid->context; + CNETERR("%s: ADDR ERROR %d cm_id %p\n", + libcfs_nid2str(peer_ni->ibp_nid), event->status, cmid); + kiblnd_peer_connect_failed(peer_ni, 1, -EHOSTUNREACH); + kiblnd_peer_decref(peer_ni); return -EHOSTUNREACH; /* rc != 0 destroys cmid */ case RDMA_CM_EVENT_ADDR_RESOLVED: - peer = (kib_peer_t *)cmid->context; + peer_ni = cmid->context; - CDEBUG(D_NET,"%s Addr resolved: %d\n", - libcfs_nid2str(peer->ibp_nid), event->status); + CDEBUG(D_NET, "%s Addr resolved: %d cm_id %p\n", + libcfs_nid2str(peer_ni->ibp_nid), event->status, cmid); if (event->status != 0) { - CNETERR("Can't resolve address for %s: %d\n", - libcfs_nid2str(peer->ibp_nid), event->status); + CNETERR("Can't resolve address for %s: %d cm_id %p\n", + libcfs_nid2str(peer_ni->ibp_nid), + event->status, cmid); rc = event->status; - } else { - rc = rdma_resolve_route( - cmid, *kiblnd_tunables.kib_timeout * 1000); - if (rc == 0) - return 0; + } else { + kiblnd_set_tos(cmid); + rc = rdma_resolve_route( + cmid, kiblnd_timeout() * 1000); + if (rc == 0) { + struct kib_net *net = peer_ni->ibp_ni->ni_data; + struct kib_dev *dev = net->ibn_dev; + + CDEBUG(D_NET, "%s: connection bound to "\ + "%s:%pI4h:%s\n", + libcfs_nid2str(peer_ni->ibp_nid), + dev->ibd_ifname, + &dev->ibd_ifip, cmid->device->name); + + return 0; + } + /* Can't initiate route resolution */ - CERROR("Can't resolve route for %s: %d\n", - libcfs_nid2str(peer->ibp_nid), rc); + CNETERR("Can't resolve route for %s: %d cm_id %p\n", + libcfs_nid2str(peer_ni->ibp_nid), rc, cmid); } - kiblnd_peer_connect_failed(peer, 1, rc); - kiblnd_peer_decref(peer); + kiblnd_peer_connect_failed(peer_ni, 1, rc); + kiblnd_peer_decref(peer_ni); return rc; /* rc != 0 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); + peer_ni = cmid->context; + CNETERR("%s: ROUTE ERROR %d cm_id %p\n", + libcfs_nid2str(peer_ni->ibp_nid), event->status, cmid); + kiblnd_peer_connect_failed(peer_ni, 1, -EHOSTUNREACH); + kiblnd_peer_decref(peer_ni); return -EHOSTUNREACH; /* rc != 0 destroys cmid */ case RDMA_CM_EVENT_ROUTE_RESOLVED: - peer = (kib_peer_t *)cmid->context; + peer_ni = cmid->context; CDEBUG(D_NET,"%s Route resolved: %d\n", - libcfs_nid2str(peer->ibp_nid), event->status); + libcfs_nid2str(peer_ni->ibp_nid), event->status); if (event->status == 0) 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); + CNETERR("Can't resolve route for %s: %d cm_id %p\n", + libcfs_nid2str(peer_ni->ibp_nid), event->status, cmid); + kiblnd_peer_connect_failed(peer_ni, 1, event->status); + kiblnd_peer_decref(peer_ni); return event->status; /* rc != 0 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); + conn = cmid->context; + CNETERR("%s: UNREACHABLE %d cm_id %p conn %p ibc_state: %d\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), + event->status, cmid, conn, conn->ibc_state); + LASSERT(conn->ibc_state != IBLND_CONN_INIT); + if (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || + conn->ibc_state == IBLND_CONN_PASSIVE_WAIT) { + 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; + conn = cmid->context; + CNETERR("%s: CONNECT ERROR %d cm_id %p conn %p state: %d\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), + event->status, cmid, conn, conn->ibc_state); + if (conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || + conn->ibc_state == IBLND_CONN_PASSIVE_WAIT) { + kiblnd_connreq_done(conn, -ENOTCONN); + kiblnd_conn_decref(conn); + } + return 0; case RDMA_CM_EVENT_REJECTED: - conn = (kib_conn_t *)cmid->context; + conn = 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); + CERROR("%s: REJECTED %d cm_id %p\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), + event->status, cmid); kiblnd_connreq_done(conn, -ECONNRESET); break; @@ -3044,20 +3403,20 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) return 0; case RDMA_CM_EVENT_ESTABLISHED: - conn = (kib_conn_t *)cmid->context; + conn = 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)); + CDEBUG(D_NET, "ESTABLISHED (passive): %s cm_id %p conn %p\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), cmid, conn); 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)); + CDEBUG(D_NET, "ESTABLISHED(active): %s cm_id %p conn %p\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), cmid, conn); kiblnd_check_connreply(conn, (void *)KIBLND_CONN_PARAM(event), KIBLND_CONN_PARAM_LEN(event)); @@ -3071,10 +3430,10 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) return 0; case RDMA_CM_EVENT_DISCONNECTED: - conn = (kib_conn_t *)cmid->context; + conn = cmid->context; if (conn->ibc_state < IBLND_CONN_ESTABLISHED) { - CERROR("%s DISCONNECTED\n", - libcfs_nid2str(conn->ibc_peer->ibp_nid)); + CERROR("%s DISCONNECTED cm_id %p conn %p\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), cmid, conn); kiblnd_connreq_done(conn, -ECONNRESET); } else { kiblnd_close_conn(conn, 0); @@ -3098,14 +3457,11 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) } static int -kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs) +kiblnd_check_txs_locked(struct kib_conn *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); + struct kib_tx *tx; + list_for_each_entry(tx, txs, tx_list) { if (txs != &conn->ibc_active_txs) { LASSERT(tx->tx_queued); } else { @@ -3113,10 +3469,13 @@ kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs) LASSERT(tx->tx_waiting || tx->tx_sending != 0); } - if (cfs_time_aftereq(jiffies, tx->tx_deadline)) { - CERROR("Timed out tx: %s, %lu seconds\n", + if (ktime_compare(ktime_get(), tx->tx_deadline) >= 0) { + CERROR("Timed out tx: %s(WSQ:%d%d%d), %lld seconds\n", kiblnd_queue2str(conn, txs), - cfs_duration_sec(jiffies - tx->tx_deadline)); + tx->tx_waiting, tx->tx_sending, tx->tx_queued, + kiblnd_timeout() + + ktime_ms_delta(ktime_get(), + tx->tx_deadline) / MSEC_PER_SEC); return 1; } } @@ -3125,7 +3484,7 @@ kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs) } static int -kiblnd_conn_timed_out_locked(kib_conn_t *conn) +kiblnd_conn_timed_out_locked(struct kib_conn *conn) { return kiblnd_check_txs_locked(conn, &conn->ibc_tx_queue) || kiblnd_check_txs_locked(conn, &conn->ibc_tx_noops) || @@ -3137,29 +3496,37 @@ kiblnd_conn_timed_out_locked(kib_conn_t *conn) static void kiblnd_check_conns (int idx) { - struct list_head closes = LIST_HEAD_INIT(closes); - struct list_head checksends = LIST_HEAD_INIT(checksends); - struct list_head *peers = &kiblnd_data.kib_peers[idx]; - struct list_head *ptmp; - kib_peer_t *peer; - kib_conn_t *conn; - 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_HEAD(closes); + LIST_HEAD(checksends); + LIST_HEAD(timedout_txs); + struct hlist_head *peers = &kiblnd_data.kib_peers[idx]; + struct kib_peer_ni *peer_ni; + struct kib_conn *conn; + struct kib_tx *tx, *tx_tmp; + 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... + */ + write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); - list_for_each(ptmp, peers) { - peer = list_entry(ptmp, kib_peer_t, ibp_list); + hlist_for_each_entry(peer_ni, peers, ibp_list) { + /* Check tx_deadline */ + list_for_each_entry_safe(tx, tx_tmp, &peer_ni->ibp_tx_queue, tx_list) { + if (ktime_compare(ktime_get(), tx->tx_deadline) >= 0) { + CWARN("Timed out tx for %s: %lld seconds\n", + libcfs_nid2str(peer_ni->ibp_nid), + ktime_ms_delta(ktime_get(), + tx->tx_deadline) / MSEC_PER_SEC); + list_move(&tx->tx_list, &timedout_txs); + } + } - list_for_each(ctmp, &peer->ibp_conns) { + list_for_each_entry(conn, &peer_ni->ibp_conns, ibc_list) { 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); @@ -3172,14 +3539,16 @@ kiblnd_check_conns (int idx) } 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), + CERROR("Timed out RDMA with %s (%lld): c: %u, oc: %u, rc: %u\n", + libcfs_nid2str(peer_ni->ibp_nid), + ktime_get_seconds() + - peer_ni->ibp_last_alive, conn->ibc_credits, conn->ibc_outstanding_credits, conn->ibc_reserved_credits); +#ifdef O2IBLND_CONN_STATE_DEBUG + kiblnd_dump_conn_dbg(conn); +#endif list_add(&conn->ibc_connd_list, &closes); } else { list_add(&conn->ibc_connd_list, &checksends); @@ -3191,14 +3560,19 @@ kiblnd_check_conns (int idx) } } - read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); + write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); + + if (!list_empty(&timedout_txs)) + kiblnd_txlist_done(&timedout_txs, -ETIMEDOUT, + LNET_MSG_STATUS_NETWORK_TIMEOUT); /* Handle timeout by closing the whole * connection. We can only be sure RDMA activity - * has ceased once the QP has been modified. */ - while (!list_empty(&closes)) { - conn = list_entry(closes.next, - kib_conn_t, ibc_connd_list); + * has ceased once the QP has been modified. + */ + while ((conn = list_first_entry_or_null(&closes, + struct kib_conn, + ibc_connd_list)) != NULL) { list_del(&conn->ibc_connd_list); kiblnd_close_conn(conn, -ETIMEDOUT); kiblnd_conn_decref(conn); @@ -3206,23 +3580,30 @@ kiblnd_check_conns (int idx) /* 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); + * free to do it last time... + */ + while ((conn = list_first_entry_or_null(&checksends, + struct kib_conn, + ibc_connd_list)) != NULL) { list_del(&conn->ibc_connd_list); - kiblnd_check_sends(conn); + + spin_lock(&conn->ibc_lock); + kiblnd_check_sends_locked(conn); + spin_unlock(&conn->ibc_lock); + kiblnd_conn_decref(conn); } } static void -kiblnd_disconnect_conn (kib_conn_t *conn) +kiblnd_disconnect_conn(struct kib_conn *conn) { LASSERT (!in_interrupt()); LASSERT (current == kiblnd_data.kib_connd); LASSERT (conn->ibc_state == IBLND_CONN_CLOSING); - +#ifdef O2IBLND_CONN_STATE_DEBUG + kiblnd_dump_conn_dbg(conn); +#endif rdma_disconnect(conn->ibc_cmid); kiblnd_finalise_conn(conn); @@ -3230,7 +3611,7 @@ kiblnd_disconnect_conn (kib_conn_t *conn) } /* - * High-water for reconnection to the same peer, reconnection attempt should + * High-water for reconnection to the same peer_ni, reconnection attempt should * be delayed after trying more than KIB_RECONN_HIGH_RACE. */ #define KIB_RECONN_HIGH_RACE 10 @@ -3243,19 +3624,17 @@ kiblnd_disconnect_conn (kib_conn_t *conn) int kiblnd_connd (void *arg) { - spinlock_t *lock= &kiblnd_data.kib_connd_lock; - 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); + spinlock_t *lock = &kiblnd_data.kib_connd_lock; + wait_queue_entry_t wait; + unsigned long flags; + struct kib_conn *conn; + int timeout; + int i; + bool dropped_lock; + int peer_index = 0; + unsigned long deadline = jiffies; + + init_wait(&wait); kiblnd_data.kib_connd = current; spin_lock_irqsave(lock, flags); @@ -3263,30 +3642,32 @@ kiblnd_connd (void *arg) while (!kiblnd_data.kib_shutdown) { int reconn = 0; - dropped_lock = 0; + dropped_lock = false; - if (!list_empty(&kiblnd_data.kib_connd_zombies)) { - kib_peer_t *peer = NULL; + conn = list_first_entry_or_null(&kiblnd_data.kib_connd_zombies, + struct kib_conn, ibc_list); + if (conn) { + struct kib_peer_ni *peer_ni = NULL; - conn = list_entry(kiblnd_data.kib_connd_zombies.next, - kib_conn_t, ibc_list); list_del(&conn->ibc_list); if (conn->ibc_reconnect) { - peer = conn->ibc_peer; - kiblnd_peer_addref(peer); + peer_ni = conn->ibc_peer; + kiblnd_peer_addref(peer_ni); } spin_unlock_irqrestore(lock, flags); - dropped_lock = 1; + dropped_lock = true; - kiblnd_destroy_conn(conn, !peer); + kiblnd_destroy_conn(conn); spin_lock_irqsave(lock, flags); - if (!peer) + if (!peer_ni) { + LIBCFS_FREE(conn, sizeof(*conn)); continue; + } - conn->ibc_peer = peer; - if (peer->ibp_reconnected < KIB_RECONN_HIGH_RACE) + conn->ibc_peer = peer_ni; + if (peer_ni->ibp_reconnected < KIB_RECONN_HIGH_RACE) list_add_tail(&conn->ibc_list, &kiblnd_data.kib_reconn_list); else @@ -3294,36 +3675,45 @@ kiblnd_connd (void *arg) &kiblnd_data.kib_reconn_wait); } - if (!list_empty(&kiblnd_data.kib_connd_conns)) { - conn = list_entry(kiblnd_data.kib_connd_conns.next, - kib_conn_t, ibc_list); + conn = list_first_entry_or_null(&kiblnd_data.kib_connd_conns, + struct kib_conn, ibc_list); + if (conn) { + int wait; + list_del(&conn->ibc_list); spin_unlock_irqrestore(lock, flags); - dropped_lock = 1; + dropped_lock = true; kiblnd_disconnect_conn(conn); - kiblnd_conn_decref(conn); + wait = conn->ibc_waits; + if (wait == 0) /* keep ref for connd_wait, see below */ + kiblnd_conn_decref(conn); spin_lock_irqsave(lock, flags); - } + + if (wait) + list_add_tail(&conn->ibc_list, + &kiblnd_data.kib_connd_waits); + } while (reconn < KIB_RECONN_BREAK) { - if (kiblnd_data.kib_reconn_sec != get_seconds()) { - kiblnd_data.kib_reconn_sec = get_seconds(); + if (kiblnd_data.kib_reconn_sec != + ktime_get_real_seconds()) { + kiblnd_data.kib_reconn_sec = ktime_get_real_seconds(); list_splice_init(&kiblnd_data.kib_reconn_wait, &kiblnd_data.kib_reconn_list); } - if (list_empty(&kiblnd_data.kib_reconn_list)) + conn = list_first_entry_or_null(&kiblnd_data.kib_reconn_list, + struct kib_conn, ibc_list); + if (!conn) break; - conn = list_entry(kiblnd_data.kib_reconn_list.next, - kib_conn_t, ibc_list); list_del(&conn->ibc_list); spin_unlock_irqrestore(lock, flags); - dropped_lock = 1; + dropped_lock = true; reconn += kiblnd_reconnect_peer(conn->ibc_peer); kiblnd_peer_decref(conn->ibc_peer); @@ -3332,37 +3722,55 @@ kiblnd_connd (void *arg) spin_lock_irqsave(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; + conn = list_first_entry_or_null(&kiblnd_data.kib_connd_waits, + struct kib_conn, ibc_list); + if (conn) { + list_del(&conn->ibc_list); + spin_unlock_irqrestore(lock, flags); + + dropped_lock = kiblnd_tx_may_discard(conn); + if (dropped_lock) + kiblnd_conn_decref(conn); + + spin_lock_irqsave(lock, flags); + if (!dropped_lock) + list_add_tail(&conn->ibc_list, + &kiblnd_data.kib_connd_waits); + } + + /* careful with the jiffy wrap... */ + timeout = (int)(deadline - jiffies); + if (timeout <= 0) { + const int n = 4; + const int p = 1; + int chunk = HASH_SIZE(kiblnd_data.kib_peers); + unsigned int lnd_timeout; spin_unlock_irqrestore(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 == 0) - chunk = 1; + dropped_lock = true; + + /* Time to check for RDMA timeouts on a few more + * peers: I do checks every 'p' seconds on a + * proportion of the peer_ni 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. + */ + + lnd_timeout = kiblnd_timeout(); + if (lnd_timeout > n * p) + chunk = (chunk * n * p) / lnd_timeout; + if (chunk == 0) + chunk = 1; for (i = 0; i < chunk; i++) { kiblnd_check_conns(peer_index); peer_index = (peer_index + 1) % - kiblnd_data.kib_peer_hash_size; + HASH_SIZE(kiblnd_data.kib_peers); } - deadline += msecs_to_jiffies(p * MSEC_PER_SEC); + deadline += cfs_time_seconds(p); spin_lock_irqsave(lock, flags); } @@ -3376,7 +3784,6 @@ kiblnd_connd (void *arg) schedule_timeout(timeout); - set_current_state(TASK_RUNNING); remove_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); spin_lock_irqsave(lock, flags); } @@ -3390,19 +3797,36 @@ kiblnd_connd (void *arg) void kiblnd_qp_event(struct ib_event *event, void *arg) { - kib_conn_t *conn = arg; + struct kib_conn *conn = arg; - switch (event->event) { - case IB_EVENT_COMM_EST: - CDEBUG(D_NET, "%s established\n", - libcfs_nid2str(conn->ibc_peer->ibp_nid)); - return; + switch (event->event) { + case IB_EVENT_COMM_EST: + CDEBUG(D_NET, "%s established\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid)); + /* We received a packet but connection isn't established + * probably handshake packet was lost, so free to + * force make connection established */ + rdma_notify(conn->ibc_cmid, IB_EVENT_COMM_EST); + return; - default: - CERROR("%s: Async QP event type %d\n", - libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); - return; - } + case IB_EVENT_PORT_ERR: + case IB_EVENT_DEVICE_FATAL: + CERROR("Fatal device error for NI %s\n", + libcfs_nidstr(&conn->ibc_peer->ibp_ni->ni_nid)); + atomic_set(&conn->ibc_peer->ibp_ni->ni_fatal_error_on, 1); + return; + + case IB_EVENT_PORT_ACTIVE: + CERROR("Port reactivated for NI %s\n", + libcfs_nidstr(&conn->ibc_peer->ibp_ni->ni_nid)); + atomic_set(&conn->ibc_peer->ibp_ni->ni_fatal_error_on, 0); + return; + + default: + CERROR("%s: Async QP event type %d\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); + return; + } } static void @@ -3448,9 +3872,9 @@ kiblnd_cq_completion(struct ib_cq *cq, void *arg) * consuming my CQ I could be called after all completions have * occurred. But in this case, ibc_nrx == 0 && ibc_nsends_posted == 0 * and this CQ is about to be destroyed so I NOOP. */ - kib_conn_t *conn = (kib_conn_t *)arg; - struct kib_sched_info *sched = conn->ibc_sched; - unsigned long flags; + struct kib_conn *conn = arg; + struct kib_sched_info *sched = conn->ibc_sched; + unsigned long flags; LASSERT(cq == conn->ibc_cq); @@ -3462,6 +3886,7 @@ kiblnd_cq_completion(struct ib_cq *cq, void *arg) (conn->ibc_nrx > 0 || conn->ibc_nsends_posted > 0)) { kiblnd_conn_addref(conn); /* +1 ref for sched_conns */ + kiblnd_dump_conn_dbg(conn); conn->ibc_scheduled = 1; list_add_tail(&conn->ibc_sched_list, &sched->ibs_conns); @@ -3475,7 +3900,7 @@ kiblnd_cq_completion(struct ib_cq *cq, void *arg) void kiblnd_cq_event(struct ib_event *event, void *arg) { - kib_conn_t *conn = arg; + struct kib_conn *conn = arg; CERROR("%s: async CQ event type %d\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), event->event); @@ -3484,47 +3909,41 @@ kiblnd_cq_event(struct ib_event *event, void *arg) 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(); + long id = (long)arg; + struct kib_sched_info *sched; + struct kib_conn *conn; + wait_queue_entry_t wait; + unsigned long flags; + struct ib_wc wc; + bool did_something; + int rc; - init_waitqueue_entry(&wait, current); + init_wait(&wait); sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)]; rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt); if (rc != 0) { - 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); + CWARN("Unable to bind on CPU partition %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) { + if (need_resched()) { spin_unlock_irqrestore(&sched->ibs_lock, flags); cond_resched(); - busy_loops = 0; spin_lock_irqsave(&sched->ibs_lock, flags); } - did_something = 0; + did_something = false; - if (!list_empty(&sched->ibs_conns)) { - conn = list_entry(sched->ibs_conns.next, - kib_conn_t, ibc_sched_list); + conn = list_first_entry_or_null(&sched->ibs_conns, + struct kib_conn, + ibc_sched_list); + if (conn) { /* take over kib_sched_conns' ref on conn... */ LASSERT(conn->ibc_scheduled); list_del(&conn->ibc_sched_list); @@ -3534,18 +3953,18 @@ kiblnd_scheduler(void *arg) wc.wr_id = IBLND_WID_INVAL; - rc = ib_poll_cq(conn->ibc_cq, 1, &wc); - if (rc == 0) { - 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); + rc = ib_poll_cq(conn->ibc_cq, 1, &wc); + if (rc == 0) { + 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 %p\n", + libcfs_nid2str(conn->ibc_peer->ibp_nid), + rc, conn); + kiblnd_close_conn(conn, -EIO); + kiblnd_conn_decref(conn); spin_lock_irqsave(&sched->ibs_lock, - flags); + flags); continue; } @@ -3566,10 +3985,9 @@ kiblnd_scheduler(void *arg) } if (rc < 0) { - CWARN("%s: ib_poll_cq failed: %d, " - "closing connection\n", + CWARN("%s: ib_poll_cq failed: %d, closing connection %p\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), - rc); + rc, conn); kiblnd_close_conn(conn, -EIO); kiblnd_conn_decref(conn); spin_lock_irqsave(&sched->ibs_lock, flags); @@ -3585,7 +4003,7 @@ kiblnd_scheduler(void *arg) /* +1 ref for sched_conns */ kiblnd_conn_addref(conn); list_add_tail(&conn->ibc_sched_list, - &sched->ibs_conns); + &sched->ibs_conns); if (waitqueue_active(&sched->ibs_waitq)) wake_up(&sched->ibs_waitq); } else { @@ -3597,21 +4015,20 @@ kiblnd_scheduler(void *arg) kiblnd_complete(&wc); spin_lock_irqsave(&sched->ibs_lock, flags); - } + } - kiblnd_conn_decref(conn); /* ...drop my ref from above */ - did_something = 1; - } + kiblnd_conn_decref(conn); /* ..drop my ref from above */ + did_something = true; + } - if (did_something) - continue; + 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); set_current_state(TASK_RUNNING); @@ -3627,60 +4044,58 @@ kiblnd_scheduler(void *arg) 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; + rwlock_t *glock = &kiblnd_data.kib_global_lock; + struct kib_dev *dev; + struct net *ns = arg; + wait_queue_entry_t wait; + unsigned long flags; + int rc; LASSERT(*kiblnd_tunables.kib_dev_failover != 0); - cfs_block_allsigs(); - - init_waitqueue_entry(&wait, current); + init_wait(&wait); write_lock_irqsave(glock, flags); - while (!kiblnd_data.kib_shutdown) { - int do_failover = 0; - int long_sleep; + while (!kiblnd_data.kib_shutdown) { + bool do_failover = false; + int long_sleep; list_for_each_entry(dev, &kiblnd_data.kib_failed_devs, - ibd_fail_list) { - if (cfs_time_before(cfs_time_current(), - dev->ibd_next_failover)) - continue; - do_failover = 1; - break; - } + ibd_fail_list) { + if (ktime_get_seconds() < dev->ibd_next_failover) + continue; + do_failover = true; + break; + } - if (do_failover) { + if (do_failover) { list_del_init(&dev->ibd_fail_list); - dev->ibd_failover = 1; + dev->ibd_failover = 1; write_unlock_irqrestore(glock, flags); - rc = kiblnd_dev_failover(dev); + rc = kiblnd_dev_failover(dev, ns); 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)) { + LASSERT(dev->ibd_failover); + dev->ibd_failover = 0; + if (rc >= 0) { /* Device is OK or failover succeed */ + dev->ibd_next_failover = ktime_get_seconds() + 3; + continue; + } + + /* failed to failover, retry later */ + dev->ibd_next_failover = ktime_get_seconds() + + min(dev->ibd_failed_failover, 10); + if (kiblnd_dev_can_failover(dev)) { list_add_tail(&dev->ibd_fail_list, - &kiblnd_data.kib_failed_devs); - } + &kiblnd_data.kib_failed_devs); + } - continue; - } + continue; + } - /* long sleep if no more pending failover */ + /* long sleep if no more pending failover */ long_sleep = list_empty(&kiblnd_data.kib_failed_devs); set_current_state(TASK_INTERRUPTIBLE); @@ -3688,28 +4103,29 @@ kiblnd_failover_thread(void *arg) write_unlock_irqrestore(glock, flags); rc = schedule_timeout(long_sleep ? cfs_time_seconds(10) : - cfs_time_seconds(1)); + cfs_time_seconds(1)); set_current_state(TASK_RUNNING); remove_wait_queue(&kiblnd_data.kib_failover_waitq, &wait); write_lock_irqsave(glock, flags); - if (!long_sleep || rc != 0) - continue; + if (!long_sleep || rc != 0) + 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 */ + /* 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)) { + if (kiblnd_dev_can_failover(dev)) { list_add_tail(&dev->ibd_fail_list, - &kiblnd_data.kib_failed_devs); - } - } - } + &kiblnd_data.kib_failed_devs); + } + } + } write_unlock_irqrestore(glock, flags); - kiblnd_thread_fini(); - return 0; + kiblnd_thread_fini(); + return 0; }