diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c')
| -rw-r--r-- | drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c | 1048 |
1 files changed, 646 insertions, 402 deletions
diff --git a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c index c7b9ccb13f1c..2323e8d3a318 100644 --- a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c +++ b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c @@ -40,6 +40,15 @@ #include "o2iblnd.h" +static void kiblnd_peer_alive(kib_peer_t *peer); +static void kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error); +static void kiblnd_check_sends(kib_conn_t *conn); +static void kiblnd_init_tx_msg(lnet_ni_t *ni, kib_tx_t *tx, + int type, int body_nob); +static int kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type, + int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie); +static void kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn); +static void kiblnd_queue_tx(kib_tx_t *tx, kib_conn_t *conn); static void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx); static void @@ -50,12 +59,12 @@ kiblnd_tx_done(lnet_ni_t *ni, kib_tx_t *tx) int rc; int i; - LASSERT(net != NULL); + LASSERT(net); 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_sending); /* mustn't be awaiting sent callback */ LASSERT(!tx->tx_waiting); /* mustn't be awaiting peer response */ - LASSERT(tx->tx_pool != NULL); + LASSERT(tx->tx_pool); kiblnd_unmap_tx(ni, tx); @@ -64,7 +73,7 @@ kiblnd_tx_done(lnet_ni_t *ni, kib_tx_t *tx) lntmsg[1] = tx->tx_lntmsg[1]; tx->tx_lntmsg[1] = NULL; rc = tx->tx_status; - if (tx->tx_conn != NULL) { + if (tx->tx_conn) { LASSERT(ni == tx->tx_conn->ibc_peer->ibp_ni); kiblnd_conn_decref(tx->tx_conn); @@ -78,7 +87,7 @@ kiblnd_tx_done(lnet_ni_t *ni, kib_tx_t *tx) /* delay finalize until my descs have been freed */ for (i = 0; i < 2; i++) { - if (lntmsg[i] == NULL) + if (!lntmsg[i]) continue; lnet_finalize(ni, lntmsg[i], rc); @@ -111,19 +120,19 @@ kiblnd_get_idle_tx(lnet_ni_t *ni, lnet_nid_t target) tps = net->ibn_tx_ps[lnet_cpt_of_nid(target)]; node = kiblnd_pool_alloc_node(&tps->tps_poolset); - if (node == NULL) + if (!node) return NULL; - tx = container_of(node, kib_tx_t, tx_list); + tx = list_entry(node, kib_tx_t, tx_list); - LASSERT(tx->tx_nwrq == 0); + LASSERT(!tx->tx_nwrq); LASSERT(!tx->tx_queued); - LASSERT(tx->tx_sending == 0); + LASSERT(!tx->tx_sending); LASSERT(!tx->tx_waiting); - LASSERT(tx->tx_status == 0); - LASSERT(tx->tx_conn == NULL); - LASSERT(tx->tx_lntmsg[0] == NULL); - LASSERT(tx->tx_lntmsg[1] == NULL); - LASSERT(tx->tx_nfrags == 0); + LASSERT(!tx->tx_status); + LASSERT(!tx->tx_conn); + LASSERT(!tx->tx_lntmsg[0]); + LASSERT(!tx->tx_lntmsg[1]); + LASSERT(!tx->tx_nfrags); return tx; } @@ -149,17 +158,15 @@ kiblnd_post_rx(kib_rx_t *rx, int credit) kib_conn_t *conn = rx->rx_conn; kib_net_t *net = conn->ibc_peer->ibp_ni->ni_data; struct ib_recv_wr *bad_wrq = NULL; - struct ib_mr *mr; + struct ib_mr *mr = conn->ibc_hdev->ibh_mrs; int rc; - LASSERT(net != NULL); + LASSERT(net); LASSERT(!in_interrupt()); LASSERT(credit == IBLND_POSTRX_NO_CREDIT || credit == IBLND_POSTRX_PEER_CREDIT || credit == IBLND_POSTRX_RSRVD_CREDIT); - - mr = kiblnd_find_dma_mr(conn->ibc_hdev, rx->rx_msgaddr, IBLND_MSG_SIZE); - LASSERT(mr != NULL); + LASSERT(mr); rx->rx_sge.lkey = mr->lkey; rx->rx_sge.addr = rx->rx_msgaddr; @@ -185,7 +192,7 @@ kiblnd_post_rx(kib_rx_t *rx, int credit) */ kiblnd_conn_addref(conn); rc = ib_post_recv(conn->ibc_cmid->qp, &rx->rx_wrq, &bad_wrq); - if (unlikely(rc != 0)) { + if (unlikely(rc)) { CERROR("Can't post rx for %s: %d, bad_wrq: %p\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), rc, bad_wrq); rx->rx_nob = 0; @@ -194,7 +201,7 @@ kiblnd_post_rx(kib_rx_t *rx, int credit) if (conn->ibc_state < IBLND_CONN_ESTABLISHED) /* Initial post */ goto out; - if (unlikely(rc != 0)) { + if (unlikely(rc)) { kiblnd_close_conn(conn, rc); kiblnd_drop_rx(rx); /* No more posts for this rx */ goto out; @@ -225,7 +232,7 @@ kiblnd_find_waiting_tx_locked(kib_conn_t *conn, int txtype, __u64 cookie) kib_tx_t *tx = list_entry(tmp, kib_tx_t, tx_list); LASSERT(!tx->tx_queued); - LASSERT(tx->tx_sending != 0 || tx->tx_waiting); + LASSERT(tx->tx_sending || tx->tx_waiting); if (tx->tx_cookie != cookie) continue; @@ -251,7 +258,7 @@ kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie) spin_lock(&conn->ibc_lock); tx = kiblnd_find_waiting_tx_locked(conn, txtype, cookie); - if (tx == NULL) { + if (!tx) { spin_unlock(&conn->ibc_lock); CWARN("Unmatched completion type %x cookie %#llx from %s\n", @@ -260,7 +267,7 @@ kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie) return; } - if (tx->tx_status == 0) { /* success so far */ + if (!tx->tx_status) { /* success so far */ if (status < 0) /* failed? */ tx->tx_status = status; else if (txtype == IBLND_MSG_GET_REQ) @@ -269,7 +276,7 @@ kiblnd_handle_completion(kib_conn_t *conn, int txtype, int status, __u64 cookie) tx->tx_waiting = 0; - idle = !tx->tx_queued && (tx->tx_sending == 0); + idle = !tx->tx_queued && !tx->tx_sending; if (idle) list_del(&tx->tx_list); @@ -285,7 +292,7 @@ kiblnd_send_completion(kib_conn_t *conn, int type, int status, __u64 cookie) lnet_ni_t *ni = conn->ibc_peer->ibp_ni; kib_tx_t *tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); - if (tx == NULL) { + if (!tx) { CERROR("Can't get tx for completion %x for %s\n", type, libcfs_nid2str(conn->ibc_peer->ibp_nid)); return; @@ -316,19 +323,18 @@ kiblnd_handle_rx(kib_rx_t *rx) msg->ibm_type, credits, libcfs_nid2str(conn->ibc_peer->ibp_nid)); - if (credits != 0) { + if (credits) { /* Have I received credits that will let me send? */ spin_lock(&conn->ibc_lock); if (conn->ibc_credits + credits > - IBLND_MSG_QUEUE_SIZE(conn->ibc_version)) { + conn->ibc_queue_depth) { rc2 = conn->ibc_credits; spin_unlock(&conn->ibc_lock); CERROR("Bad credits from %s: %d + %d > %d\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), - rc2, credits, - IBLND_MSG_QUEUE_SIZE(conn->ibc_version)); + rc2, credits, conn->ibc_queue_depth); kiblnd_close_conn(conn, -EPROTO); kiblnd_post_rx(rx, IBLND_POSTRX_NO_CREDIT); @@ -360,7 +366,7 @@ kiblnd_handle_rx(kib_rx_t *rx) break; } - if (credits != 0) /* credit already posted */ + if (credits) /* credit already posted */ post_credit = IBLND_POSTRX_NO_CREDIT; else /* a keepalive NOOP */ post_credit = IBLND_POSTRX_PEER_CREDIT; @@ -396,12 +402,12 @@ kiblnd_handle_rx(kib_rx_t *rx) spin_lock(&conn->ibc_lock); tx = kiblnd_find_waiting_tx_locked(conn, IBLND_MSG_PUT_REQ, - msg->ibm_u.putack.ibpam_src_cookie); - if (tx != NULL) + msg->ibm_u.putack.ibpam_src_cookie); + if (tx) list_del(&tx->tx_list); spin_unlock(&conn->ibc_lock); - if (tx == NULL) { + if (!tx) { CERROR("Unmatched PUT_ACK from %s\n", libcfs_nid2str(conn->ibc_peer->ibp_nid)); rc = -EPROTO; @@ -409,10 +415,11 @@ kiblnd_handle_rx(kib_rx_t *rx) } LASSERT(tx->tx_waiting); - /* CAVEAT EMPTOR: I could be racing with tx_complete, but... + /* + * CAVEAT EMPTOR: I could be racing with tx_complete, but... * (a) I can overwrite tx_msg since my peer has received it! - * (b) tx_waiting set tells tx_complete() it's not done. */ - + * (b) tx_waiting set tells tx_complete() it's not done. + */ tx->tx_nwrq = 0; /* overwrite PUT_REQ */ rc2 = kiblnd_init_rdma(conn, tx, IBLND_MSG_PUT_DONE, @@ -469,7 +476,7 @@ kiblnd_rx_complete(kib_rx_t *rx, int status, int nob) int rc; int err = -EIO; - LASSERT(net != NULL); + LASSERT(net); LASSERT(rx->rx_nob < 0); /* was posted */ rx->rx_nob = 0; /* isn't now */ @@ -486,9 +493,9 @@ kiblnd_rx_complete(kib_rx_t *rx, int status, int nob) rx->rx_nob = nob; rc = kiblnd_unpack_msg(msg, rx->rx_nob); - if (rc != 0) { + if (rc) { CERROR("Error %d unpacking rx from %s\n", - rc, libcfs_nid2str(conn->ibc_peer->ibp_nid)); + rc, libcfs_nid2str(conn->ibc_peer->ibp_nid)); goto failed; } @@ -497,7 +504,7 @@ kiblnd_rx_complete(kib_rx_t *rx, int status, int nob) 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)); + libcfs_nid2str(conn->ibc_peer->ibp_nid)); err = -ESTALE; goto failed; } @@ -537,7 +544,7 @@ kiblnd_kvaddr_to_page(unsigned long vaddr) if (is_vmalloc_addr((void *)vaddr)) { page = vmalloc_to_page((void *)vaddr); - LASSERT(page != NULL); + LASSERT(page); return page; } #ifdef CONFIG_HIGHMEM @@ -549,7 +556,7 @@ kiblnd_kvaddr_to_page(unsigned long vaddr) } #endif page = virt_to_page(vaddr); - LASSERT(page != NULL); + LASSERT(page); return page; } @@ -565,8 +572,8 @@ kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob) int rc; int i; - LASSERT(tx->tx_pool != NULL); - LASSERT(tx->tx_pool->tpo_pool.po_owner != NULL); + LASSERT(tx->tx_pool); + LASSERT(tx->tx_pool->tpo_pool.po_owner); hdev = tx->tx_pool->tpo_hdev; @@ -582,13 +589,15 @@ kiblnd_fmr_map_tx(kib_net_t *net, kib_tx_t *tx, kib_rdma_desc_t *rd, int nob) fps = net->ibn_fmr_ps[cpt]; rc = kiblnd_fmr_pool_map(fps, pages, npages, 0, &tx->fmr); - if (rc != 0) { + if (rc) { CERROR("Can't map %d pages: %d\n", npages, rc); return rc; } - /* If rd is not tx_rd, it's going to get sent to a peer, who will need - * the rkey */ + /* + * If rd is not tx_rd, it's going to get sent to a peer, who will need + * the rkey + */ rd->rd_key = (rd != tx->tx_rd) ? tx->fmr.fmr_pfmr->fmr->rkey : tx->fmr.fmr_pfmr->fmr->lkey; rd->rd_frags[0].rf_addr &= ~hdev->ibh_page_mask; @@ -602,14 +611,14 @@ static void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx) { kib_net_t *net = ni->ni_data; - LASSERT(net != NULL); + LASSERT(net); if (net->ibn_fmr_ps && tx->fmr.fmr_pfmr) { kiblnd_fmr_pool_unmap(&tx->fmr, tx->tx_status); tx->fmr.fmr_pfmr = NULL; } - if (tx->tx_nfrags != 0) { + if (tx->tx_nfrags) { kiblnd_dma_unmap_sg(tx->tx_pool->tpo_hdev->ibh_ibdev, tx->tx_frags, tx->tx_nfrags, tx->tx_dmadir); tx->tx_nfrags = 0; @@ -625,8 +634,10 @@ static int kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, __u32 nob; int i; - /* If rd is not tx_rd, it's going to get sent to a peer and I'm the - * RDMA sink */ + /* + * If rd is not tx_rd, it's going to get sent to a peer and I'm the + * RDMA sink + */ tx->tx_dmadir = (rd != tx->tx_rd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; tx->tx_nfrags = nfrags; @@ -641,15 +652,15 @@ static int kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, nob += rd->rd_frags[i].rf_nob; } - /* looking for pre-mapping MR */ - mr = kiblnd_find_rd_dma_mr(hdev, rd); - if (mr != NULL) { + mr = kiblnd_find_rd_dma_mr(hdev, rd, tx->tx_conn ? + tx->tx_conn->ibc_max_frags : -1); + if (mr) { /* found pre-mapping MR */ rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey; return 0; } - if (net->ibn_fmr_ps != NULL) + if (net->ibn_fmr_ps) return kiblnd_fmr_map_tx(net, tx, rd, nob); return -EINVAL; @@ -668,7 +679,7 @@ kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, LASSERT(nob > 0); LASSERT(niov > 0); - LASSERT(net != NULL); + LASSERT(net); while (offset >= iov->iov_len) { offset -= iov->iov_len; @@ -684,7 +695,7 @@ kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, vaddr = ((unsigned long)iov->iov_base) + offset; page_offset = vaddr & (PAGE_SIZE - 1); page = kiblnd_kvaddr_to_page(vaddr); - if (page == NULL) { + if (!page) { CERROR("Can't find page\n"); return -EFAULT; } @@ -710,7 +721,7 @@ kiblnd_setup_rd_iov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, 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) + int nkiov, lnet_kiov_t *kiov, int offset, int nob) { kib_net_t *net = ni->ni_data; struct scatterlist *sg; @@ -720,7 +731,7 @@ kiblnd_setup_rd_kiov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, LASSERT(nob > 0); LASSERT(nkiov > 0); - LASSERT(net != NULL); + LASSERT(net); while (offset >= kiov->kiov_len) { offset -= kiov->kiov_len; @@ -750,26 +761,24 @@ kiblnd_setup_rd_kiov(lnet_ni_t *ni, kib_tx_t *tx, kib_rdma_desc_t *rd, static int kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) - __releases(conn->ibc_lock) - __acquires(conn->ibc_lock) + __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 ib_send_wr *bad_wrq; LASSERT(tx->tx_queued); /* We rely on this for QP sizing */ LASSERT(tx->tx_nwrq > 0); - LASSERT(tx->tx_nwrq <= 1 + IBLND_RDMA_FRAGS(ver)); + LASSERT(tx->tx_nwrq <= 1 + conn->ibc_max_frags); - LASSERT(credit == 0 || credit == 1); + LASSERT(!credit || credit == 1); LASSERT(conn->ibc_outstanding_credits >= 0); - LASSERT(conn->ibc_outstanding_credits <= IBLND_MSG_QUEUE_SIZE(ver)); + LASSERT(conn->ibc_outstanding_credits <= conn->ibc_queue_depth); LASSERT(conn->ibc_credits >= 0); - LASSERT(conn->ibc_credits <= IBLND_MSG_QUEUE_SIZE(ver)); + LASSERT(conn->ibc_credits <= conn->ibc_queue_depth); if (conn->ibc_nsends_posted == IBLND_CONCURRENT_SENDS(ver)) { /* tx completions outstanding... */ @@ -778,13 +787,13 @@ kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) return -EAGAIN; } - if (credit != 0 && conn->ibc_credits == 0) { /* no credits */ + if (credit && !conn->ibc_credits) { /* no credits */ CDEBUG(D_NET, "%s: no credits\n", libcfs_nid2str(peer->ibp_nid)); return -EAGAIN; } - if (credit != 0 && !IBLND_OOB_CAPABLE(ver) && + if (credit && !IBLND_OOB_CAPABLE(ver) && conn->ibc_credits == 1 && /* last credit reserved */ msg->ibm_type != IBLND_MSG_NOOP) { /* for NOOP */ CDEBUG(D_NET, "%s: not using last credit\n", @@ -800,9 +809,11 @@ kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) (!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 + /* + * OK to drop when posted enough NOOPs, since * kiblnd_check_sends will queue NOOP again when - * posted NOOPs complete */ + * posted NOOPs complete + */ spin_unlock(&conn->ibc_lock); kiblnd_tx_done(peer->ibp_ni, tx); spin_lock(&conn->ibc_lock); @@ -821,12 +832,14 @@ kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) if (msg->ibm_type == IBLND_MSG_NOOP) conn->ibc_noops_posted++; - /* CAVEAT EMPTOR! This tx could be the PUT_DONE of an RDMA + /* + * 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. */ + * from the first send; hence the ++ rather than = below. + */ tx->tx_sending++; list_add(&tx->tx_list, &conn->ibc_active_txs); @@ -838,16 +851,25 @@ kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) /* close_conn will launch failover */ rc = -ENETDOWN; } else { - rc = ib_post_send(conn->ibc_cmid->qp, &tx->tx_wrq->wr, &bad_wrq); + struct ib_send_wr *wrq = &tx->tx_wrq[tx->tx_nwrq - 1].wr; + + LASSERTF(wrq->wr_id == kiblnd_ptr2wreqid(tx, IBLND_WID_TX), + "bad wr_id %llx, opc %d, flags %d, peer: %s\n", + wrq->wr_id, wrq->opcode, wrq->send_flags, + libcfs_nid2str(conn->ibc_peer->ibp_nid)); + wrq = NULL; + rc = ib_post_send(conn->ibc_cmid->qp, &tx->tx_wrq->wr, &wrq); } conn->ibc_last_send = jiffies; - if (rc == 0) + if (!rc) return 0; - /* NB credits are transferred in the actual - * message, which can only be the last work item */ + /* + * NB credits are transferred in the actual + * message, which can only be the last work item + */ conn->ibc_credits += credit; conn->ibc_outstanding_credits += msg->ibm_credits; conn->ibc_nsends_posted--; @@ -858,7 +880,7 @@ kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) tx->tx_waiting = 0; tx->tx_sending--; - done = (tx->tx_sending == 0); + done = !tx->tx_sending; if (done) list_del(&tx->tx_list); @@ -881,7 +903,7 @@ kiblnd_post_tx_locked(kib_conn_t *conn, kib_tx_t *tx, int credit) return -EIO; } -void +static void kiblnd_check_sends(kib_conn_t *conn) { int ver = conn->ibc_version; @@ -899,13 +921,13 @@ kiblnd_check_sends(kib_conn_t *conn) LASSERT(conn->ibc_nsends_posted <= IBLND_CONCURRENT_SENDS(ver)); LASSERT(!IBLND_OOB_CAPABLE(ver) || - conn->ibc_noops_posted <= IBLND_OOB_MSGS(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); + kib_tx_t, tx_list); list_del(&tx->tx_list); list_add_tail(&tx->tx_list, &conn->ibc_tx_queue); conn->ibc_reserved_credits--; @@ -915,23 +937,21 @@ kiblnd_check_sends(kib_conn_t *conn) spin_unlock(&conn->ibc_lock); tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); - if (tx != NULL) + if (tx) kiblnd_init_tx_msg(ni, tx, IBLND_MSG_NOOP, 0); spin_lock(&conn->ibc_lock); - if (tx != NULL) + if (tx) kiblnd_queue_tx_locked(tx, conn); } - kiblnd_conn_addref(conn); /* 1 ref for me.... (see b21911) */ - for (;;) { int credit; if (!list_empty(&conn->ibc_tx_queue_nocred)) { credit = 0; tx = list_entry(conn->ibc_tx_queue_nocred.next, - kib_tx_t, tx_list); + kib_tx_t, tx_list); } else if (!list_empty(&conn->ibc_tx_noops)) { LASSERT(!IBLND_OOB_CAPABLE(ver)); credit = 1; @@ -940,17 +960,16 @@ kiblnd_check_sends(kib_conn_t *conn) } else if (!list_empty(&conn->ibc_tx_queue)) { credit = 1; tx = list_entry(conn->ibc_tx_queue.next, - kib_tx_t, tx_list); - } else + kib_tx_t, tx_list); + } else { break; + } - if (kiblnd_post_tx_locked(conn, tx, credit) != 0) + if (kiblnd_post_tx_locked(conn, tx, credit)) break; } spin_unlock(&conn->ibc_lock); - - kiblnd_conn_decref(conn); /* ...until here */ } static void @@ -976,9 +995,10 @@ kiblnd_tx_complete(kib_tx_t *tx, int status) spin_lock(&conn->ibc_lock); - /* I could be racing with rdma completion. Whoever makes 'tx' idle - * gets to free it, which also drops its ref on 'conn'. */ - + /* + * I could be racing with rdma completion. Whoever makes 'tx' idle + * gets to free it, which also drops its ref on 'conn'. + */ tx->tx_sending--; conn->ibc_nsends_posted--; if (tx->tx_msg->ibm_type == IBLND_MSG_NOOP) @@ -989,7 +1009,7 @@ kiblnd_tx_complete(kib_tx_t *tx, int status) tx->tx_status = -EIO; } - idle = (tx->tx_sending == 0) && /* This is the final callback */ + idle = !tx->tx_sending && /* This is the final callback */ !tx->tx_waiting && /* Not waiting for peer */ !tx->tx_queued; /* Not re-queued (PUT_DONE) */ if (idle) @@ -1007,24 +1027,22 @@ kiblnd_tx_complete(kib_tx_t *tx, int status) kiblnd_conn_decref(conn); /* ...until here */ } -void +static void kiblnd_init_tx_msg(lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob) { kib_hca_dev_t *hdev = tx->tx_pool->tpo_hdev; struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq]; struct ib_rdma_wr *wrq = &tx->tx_wrq[tx->tx_nwrq]; int nob = offsetof(kib_msg_t, ibm_u) + body_nob; - struct ib_mr *mr; + struct ib_mr *mr = hdev->ibh_mrs; LASSERT(tx->tx_nwrq >= 0); LASSERT(tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1); LASSERT(nob <= IBLND_MSG_SIZE); + LASSERT(mr); kiblnd_init_msg(tx->tx_msg, type, body_nob); - mr = kiblnd_find_dma_mr(hdev, tx->tx_msgaddr, nob); - LASSERT(mr != NULL); - sge->lkey = mr->lkey; sge->addr = tx->tx_msgaddr; sge->length = nob; @@ -1041,25 +1059,23 @@ kiblnd_init_tx_msg(lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob) tx->tx_nwrq++; } -int +static int kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type, - int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie) + int resid, kib_rdma_desc_t *dstrd, __u64 dstcookie) { kib_msg_t *ibmsg = tx->tx_msg; kib_rdma_desc_t *srcrd = tx->tx_rd; struct ib_sge *sge = &tx->tx_sge[0]; struct ib_rdma_wr *wrq = &tx->tx_wrq[0], *next; int rc = resid; - int srcidx; - int dstidx; + int srcidx = 0; + int dstidx = 0; int wrknob; LASSERT(!in_interrupt()); - LASSERT(tx->tx_nwrq == 0); + LASSERT(!tx->tx_nwrq); LASSERT(type == IBLND_MSG_GET_DONE || - type == IBLND_MSG_PUT_DONE); - - srcidx = dstidx = 0; + type == IBLND_MSG_PUT_DONE); while (resid > 0) { if (srcidx >= srcrd->rd_nfrags) { @@ -1074,10 +1090,10 @@ kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type, break; } - if (tx->tx_nwrq == IBLND_RDMA_FRAGS(conn->ibc_version)) { - CERROR("RDMA too fragmented for %s (%d): %d/%d src %d/%d dst frags\n", + if (tx->tx_nwrq >= conn->ibc_max_frags) { + CERROR("RDMA has too many fragments for peer %s (%d), src idx/frags: %d/%d dst idx/frags: %d/%d\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), - IBLND_RDMA_FRAGS(conn->ibc_version), + conn->ibc_max_frags, srcidx, srcrd->rd_nfrags, dstidx, dstrd->rd_nfrags); rc = -EMSGSIZE; @@ -1127,7 +1143,7 @@ kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type, return rc; } -void +static void kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn) { struct list_head *q; @@ -1137,9 +1153,11 @@ kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn) LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED); tx->tx_queued = 1; - tx->tx_deadline = jiffies + (*kiblnd_tunables.kib_timeout * HZ); + tx->tx_deadline = jiffies + + msecs_to_jiffies(*kiblnd_tunables.kib_timeout * + MSEC_PER_SEC); - if (tx->tx_conn == NULL) { + if (!tx->tx_conn) { kiblnd_conn_addref(conn); tx->tx_conn = conn; LASSERT(tx->tx_msg->ibm_type != IBLND_MSG_PUT_DONE); @@ -1180,7 +1198,7 @@ kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn) list_add_tail(&tx->tx_list, q); } -void +static void kiblnd_queue_tx(kib_tx_t *tx, kib_conn_t *conn) { spin_lock(&conn->ibc_lock); @@ -1200,19 +1218,19 @@ static int kiblnd_resolve_addr(struct rdma_cm_id *cmid, /* allow the port to be reused */ rc = rdma_set_reuseaddr(cmid, 1); - if (rc != 0) { + if (rc) { CERROR("Unable to set reuse on cmid: %d\n", rc); return rc; } /* look for a free privileged port */ - for (port = PROT_SOCK-1; port > 0; port--) { + for (port = PROT_SOCK - 1; port > 0; port--) { srcaddr->sin_port = htons(port); rc = rdma_resolve_addr(cmid, (struct sockaddr *)srcaddr, (struct sockaddr *)dstaddr, timeout_ms); - if (rc == 0) { + if (!rc) { CDEBUG(D_NET, "bound to port %hu\n", port); return 0; } else if (rc == -EADDRINUSE || rc == -EADDRNOTAVAIL) { @@ -1237,8 +1255,9 @@ kiblnd_connect_peer(kib_peer_t *peer) struct sockaddr_in dstaddr; int rc; - LASSERT(net != NULL); + LASSERT(net); LASSERT(peer->ibp_connecting > 0); + LASSERT(!peer->ibp_reconnecting); cmid = kiblnd_rdma_create_id(kiblnd_cm_callback, peer, RDMA_PS_TCP, IB_QPT_RC); @@ -1271,14 +1290,14 @@ kiblnd_connect_peer(kib_peer_t *peer) (struct sockaddr *)&dstaddr, *kiblnd_tunables.kib_timeout * 1000); } - if (rc != 0) { + if (rc) { /* Can't initiate address resolution: */ CERROR("Can't resolve addr for %s: %d\n", libcfs_nid2str(peer->ibp_nid), rc); goto failed2; } - LASSERT(cmid->device != NULL); + LASSERT(cmid->device); CDEBUG(D_NET, "%s: connection bound to %s:%pI4h:%s\n", libcfs_nid2str(peer->ibp_nid), dev->ibd_ifname, &dev->ibd_ifip, cmid->device->name); @@ -1286,12 +1305,64 @@ kiblnd_connect_peer(kib_peer_t *peer) return; failed2: + kiblnd_peer_connect_failed(peer, 1, rc); kiblnd_peer_decref(peer); /* cmid's ref */ rdma_destroy_id(cmid); + return; failed: kiblnd_peer_connect_failed(peer, 1, rc); } +bool +kiblnd_reconnect_peer(kib_peer_t *peer) +{ + rwlock_t *glock = &kiblnd_data.kib_global_lock; + char *reason = NULL; + struct list_head txs; + unsigned long flags; + + INIT_LIST_HEAD(&txs); + + write_lock_irqsave(glock, flags); + if (!peer->ibp_reconnecting) { + if (peer->ibp_accepting) + reason = "accepting"; + else if (peer->ibp_connecting) + reason = "connecting"; + else if (!list_empty(&peer->ibp_conns)) + reason = "connected"; + else /* connected then closed */ + reason = "closed"; + + goto no_reconnect; + } + + LASSERT(!peer->ibp_accepting && !peer->ibp_connecting && + list_empty(&peer->ibp_conns)); + peer->ibp_reconnecting = 0; + + if (!kiblnd_peer_active(peer)) { + list_splice_init(&peer->ibp_tx_queue, &txs); + reason = "unlinked"; + goto no_reconnect; + } + + peer->ibp_connecting++; + peer->ibp_reconnected++; + write_unlock_irqrestore(glock, flags); + + kiblnd_connect_peer(peer); + 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); + return false; +} + void kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) { @@ -1302,25 +1373,28 @@ kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) unsigned long flags; int rc; - /* If I get here, I've committed to send, so I complete the tx with - * failure on any problems */ - - LASSERT(tx == NULL || tx->tx_conn == NULL); /* only set when assigned a conn */ - LASSERT(tx == NULL || tx->tx_nwrq > 0); /* work items have been set up */ + /* + * If I get here, I've committed to send, so I complete the tx with + * failure on any problems + */ + LASSERT(!tx || !tx->tx_conn); /* only set when assigned a conn */ + LASSERT(!tx || tx->tx_nwrq > 0); /* work items have been set up */ - /* First time, just use a read lock since I expect to find my peer - * connected */ + /* + * First time, just use a read lock since I expect to find my peer + * connected + */ read_lock_irqsave(g_lock, flags); peer = kiblnd_find_peer_locked(nid); - if (peer != NULL && !list_empty(&peer->ibp_conns)) { + if (peer && !list_empty(&peer->ibp_conns)) { /* Found a peer with an established connection */ conn = kiblnd_get_conn_locked(peer); kiblnd_conn_addref(conn); /* 1 ref for me... */ read_unlock_irqrestore(g_lock, flags); - if (tx != NULL) + if (tx) kiblnd_queue_tx(tx, conn); kiblnd_conn_decref(conn); /* ...to here */ return; @@ -1331,14 +1405,13 @@ kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) write_lock(g_lock); peer = kiblnd_find_peer_locked(nid); - if (peer != NULL) { + if (peer) { if (list_empty(&peer->ibp_conns)) { /* found a peer, but it's still connecting... */ - LASSERT(peer->ibp_connecting != 0 || - peer->ibp_accepting != 0); - if (tx != NULL) + LASSERT(kiblnd_peer_connecting(peer)); + if (tx) list_add_tail(&tx->tx_list, - &peer->ibp_tx_queue); + &peer->ibp_tx_queue); write_unlock_irqrestore(g_lock, flags); } else { conn = kiblnd_get_conn_locked(peer); @@ -1346,7 +1419,7 @@ kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) write_unlock_irqrestore(g_lock, flags); - if (tx != NULL) + if (tx) kiblnd_queue_tx(tx, conn); kiblnd_conn_decref(conn); /* ...to here */ } @@ -1357,9 +1430,9 @@ kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) /* Allocate a peer ready to add to the peer table and retry */ rc = kiblnd_create_peer(ni, &peer, nid); - if (rc != 0) { + if (rc) { CERROR("Can't create peer %s\n", libcfs_nid2str(nid)); - if (tx != NULL) { + if (tx) { tx->tx_status = -EHOSTUNREACH; tx->tx_waiting = 0; kiblnd_tx_done(ni, tx); @@ -1370,14 +1443,13 @@ kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) write_lock_irqsave(g_lock, flags); peer2 = kiblnd_find_peer_locked(nid); - if (peer2 != NULL) { + if (peer2) { if (list_empty(&peer2->ibp_conns)) { /* found a peer, but it's still connecting... */ - LASSERT(peer2->ibp_connecting != 0 || - peer2->ibp_accepting != 0); - if (tx != NULL) + LASSERT(kiblnd_peer_connecting(peer2)); + if (tx) 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); @@ -1385,7 +1457,7 @@ kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) write_unlock_irqrestore(g_lock, flags); - if (tx != NULL) + if (tx) kiblnd_queue_tx(tx, conn); kiblnd_conn_decref(conn); /* ...to here */ } @@ -1395,13 +1467,13 @@ kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid) } /* Brand new peer */ - LASSERT(peer->ibp_connecting == 0); + LASSERT(!peer->ibp_connecting); peer->ibp_connecting = 1; /* always called with a ref on ni, which prevents ni being shutdown */ - LASSERT(((kib_net_t *)ni->ni_data)->ibn_shutdown == 0); + LASSERT(!((kib_net_t *)ni->ni_data)->ibn_shutdown); - if (tx != NULL) + if (tx) list_add_tail(&tx->tx_list, &peer->ibp_tx_queue); kiblnd_peer_addref(peer); @@ -1437,13 +1509,13 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) 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_nob || payload_niov > 0); LASSERT(payload_niov <= LNET_MAX_IOV); /* Thread context */ LASSERT(!in_interrupt()); /* payload is either all vaddrs or all pages */ - LASSERT(!(payload_kiov != NULL && payload_iov != NULL)); + LASSERT(!(payload_kiov && payload_iov)); switch (type) { default: @@ -1451,7 +1523,7 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) return -EIO; case LNET_MSG_ACK: - LASSERT(payload_nob == 0); + LASSERT(!payload_nob); break; case LNET_MSG_GET: @@ -1464,7 +1536,7 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) break; /* send IMMEDIATE */ tx = kiblnd_get_idle_tx(ni, target.nid); - if (tx == NULL) { + if (!tx) { CERROR("Can't allocate txd for GET to %s\n", libcfs_nid2str(target.nid)); return -ENOMEM; @@ -1472,7 +1544,7 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) ibmsg = tx->tx_msg; rd = &ibmsg->ibm_u.get.ibgm_rd; - if ((lntmsg->msg_md->md_options & LNET_MD_KIOV) == 0) + if (!(lntmsg->msg_md->md_options & LNET_MD_KIOV)) rc = kiblnd_setup_rd_iov(ni, tx, rd, lntmsg->msg_md->md_niov, lntmsg->msg_md->md_iov.iov, @@ -1482,7 +1554,7 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) lntmsg->msg_md->md_niov, lntmsg->msg_md->md_iov.kiov, 0, lntmsg->msg_md->md_length); - if (rc != 0) { + if (rc) { CERROR("Can't setup GET sink for %s: %d\n", libcfs_nid2str(target.nid), rc); kiblnd_tx_done(ni, tx); @@ -1496,7 +1568,7 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) 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) { + if (!tx->tx_lntmsg[1]) { CERROR("Can't create reply for GET -> %s\n", libcfs_nid2str(target.nid)); kiblnd_tx_done(ni, tx); @@ -1516,14 +1588,14 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) break; /* send IMMEDIATE */ tx = kiblnd_get_idle_tx(ni, target.nid); - if (tx == NULL) { + if (!tx) { CERROR("Can't allocate %s txd for %s\n", type == LNET_MSG_PUT ? "PUT" : "REPLY", libcfs_nid2str(target.nid)); return -ENOMEM; } - if (payload_kiov == NULL) + if (!payload_kiov) rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd, payload_niov, payload_iov, payload_offset, payload_nob); @@ -1531,7 +1603,7 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, payload_niov, payload_kiov, payload_offset, payload_nob); - if (rc != 0) { + if (rc) { CERROR("Can't setup PUT src for %s: %d\n", libcfs_nid2str(target.nid), rc); kiblnd_tx_done(ni, tx); @@ -1555,16 +1627,16 @@ kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg) <= IBLND_MSG_SIZE); tx = kiblnd_get_idle_tx(ni, target.nid); - if (tx == NULL) { + if (!tx) { CERROR("Can't send %d to %s: tx descs exhausted\n", - type, libcfs_nid2str(target.nid)); + type, libcfs_nid2str(target.nid)); return -ENOMEM; } ibmsg = tx->tx_msg; ibmsg->ibm_u.immediate.ibim_hdr = *hdr; - if (payload_kiov != NULL) + if (payload_kiov) lnet_copy_kiov2flat(IBLND_MSG_SIZE, ibmsg, offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), payload_niov, payload_kiov, @@ -1596,22 +1668,22 @@ kiblnd_reply(lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg) int rc; tx = kiblnd_get_idle_tx(ni, rx->rx_conn->ibc_peer->ibp_nid); - if (tx == NULL) { + if (!tx) { CERROR("Can't get tx for REPLY to %s\n", libcfs_nid2str(target.nid)); goto failed_0; } - if (nob == 0) + if (!nob) rc = 0; - else if (kiov == NULL) + else if (!kiov) rc = kiblnd_setup_rd_iov(ni, tx, tx->tx_rd, niov, iov, offset, nob); else rc = kiblnd_setup_rd_kiov(ni, tx, tx->tx_rd, niov, kiov, offset, nob); - if (rc != 0) { + if (rc) { CERROR("Can't setup GET src for %s: %d\n", libcfs_nid2str(target.nid), rc); goto failed_1; @@ -1627,12 +1699,11 @@ kiblnd_reply(lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg) goto failed_1; } - if (nob == 0) { + if (!nob) { /* No RDMA: local completion may happen now! */ lnet_finalize(ni, lntmsg, 0); } else { - /* RDMA: lnet_finalize(lntmsg) when it - * completes */ + /* RDMA: lnet_finalize(lntmsg) when it completes */ tx->tx_lntmsg[0] = lntmsg; } @@ -1647,8 +1718,8 @@ kiblnd_reply(lnet_ni_t *ni, kib_rx_t *rx, lnet_msg_t *lntmsg) int kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, - unsigned int niov, struct kvec *iov, lnet_kiov_t *kiov, - unsigned int offset, unsigned int mlen, unsigned int rlen) + unsigned int niov, struct kvec *iov, lnet_kiov_t *kiov, + unsigned int offset, unsigned int mlen, unsigned int rlen) { kib_rx_t *rx = private; kib_msg_t *rxmsg = rx->rx_msg; @@ -1661,7 +1732,7 @@ kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, LASSERT(mlen <= rlen); LASSERT(!in_interrupt()); /* Either all pages or all vaddrs */ - LASSERT(!(kiov != NULL && iov != NULL)); + LASSERT(!(kiov && iov)); switch (rxmsg->ibm_type) { default: @@ -1671,13 +1742,13 @@ kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, 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); + libcfs_nid2str(rxmsg->ibm_u.immediate.ibim_hdr.src_nid), + nob, rx->rx_nob); rc = -EPROTO; break; } - if (kiov != NULL) + if (kiov) lnet_copy_flat2kiov(niov, kiov, offset, IBLND_MSG_SIZE, rxmsg, offsetof(kib_msg_t, ibm_u.immediate.ibim_payload), @@ -1694,7 +1765,7 @@ kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, kib_msg_t *txmsg; kib_rdma_desc_t *rd; - if (mlen == 0) { + if (!mlen) { lnet_finalize(ni, lntmsg, 0); kiblnd_send_completion(rx->rx_conn, IBLND_MSG_PUT_NAK, 0, rxmsg->ibm_u.putreq.ibprm_cookie); @@ -1702,7 +1773,7 @@ kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, } tx = kiblnd_get_idle_tx(ni, conn->ibc_peer->ibp_nid); - if (tx == NULL) { + if (!tx) { CERROR("Can't allocate tx for %s\n", libcfs_nid2str(conn->ibc_peer->ibp_nid)); /* Not replying will break the connection */ @@ -1712,13 +1783,13 @@ kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, txmsg = tx->tx_msg; rd = &txmsg->ibm_u.putack.ibpam_rd; - if (kiov == NULL) + if (!kiov) rc = kiblnd_setup_rd_iov(ni, tx, rd, niov, iov, offset, mlen); else rc = kiblnd_setup_rd_kiov(ni, tx, rd, niov, kiov, offset, mlen); - if (rc != 0) { + if (rc) { CERROR("Can't setup PUT sink for %s: %d\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), rc); kiblnd_tx_done(ni, tx); @@ -1744,7 +1815,7 @@ kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed, } case IBLND_MSG_GET_REQ: - if (lntmsg != NULL) { + if (lntmsg) { /* Optimized GET; RDMA lntmsg's payload */ kiblnd_reply(ni, rx, lntmsg); } else { @@ -1778,7 +1849,7 @@ kiblnd_thread_fini(void) atomic_dec(&kiblnd_data.kib_nthreads); } -void +static void kiblnd_peer_alive(kib_peer_t *peer) { /* This is racy, but everyone's only writing cfs_time_current() */ @@ -1795,10 +1866,7 @@ kiblnd_peer_notify(kib_peer_t *peer) read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); - if (list_empty(&peer->ibp_conns) && - peer->ibp_accepting == 0 && - peer->ibp_connecting == 0 && - peer->ibp_error != 0) { + if (kiblnd_peer_idle(peer) && peer->ibp_error) { error = peer->ibp_error; peer->ibp_error = 0; @@ -1807,7 +1875,7 @@ kiblnd_peer_notify(kib_peer_t *peer) read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - if (error != 0) + if (error) lnet_notify(peer->ibp_ni, peer->ibp_nid, 0, last_alive); } @@ -1815,25 +1883,27 @@ kiblnd_peer_notify(kib_peer_t *peer) void kiblnd_close_conn_locked(kib_conn_t *conn, int error) { - /* This just does the immediate housekeeping. 'error' is zero for a + /* + * This just does the immediate housekeeping. 'error' is zero for a * normal shutdown which can happen only after the connection has been * established. If the connection is established, schedule the - * connection to be finished off by the connd. Otherwise the connd is + * 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 */ + * Caller holds kib_global_lock exclusively in irq context + */ kib_peer_t *peer = conn->ibc_peer; kib_dev_t *dev; unsigned long flags; - LASSERT(error != 0 || conn->ibc_state >= IBLND_CONN_ESTABLISHED); + LASSERT(error || conn->ibc_state >= IBLND_CONN_ESTABLISHED); - if (error != 0 && conn->ibc_comms_error == 0) + if (error && !conn->ibc_comms_error) conn->ibc_comms_error = error; if (conn->ibc_state != IBLND_CONN_ESTABLISHED) return; /* already being handled */ - if (error == 0 && + if (!error && list_empty(&conn->ibc_tx_noops) && list_empty(&conn->ibc_tx_queue) && list_empty(&conn->ibc_tx_queue_rsrvd) && @@ -1843,12 +1913,12 @@ kiblnd_close_conn_locked(kib_conn_t *conn, int error) libcfs_nid2str(peer->ibp_nid)); } else { CNETERR("Closing conn to %s: error %d%s%s%s%s%s\n", - libcfs_nid2str(peer->ibp_nid), error, - list_empty(&conn->ibc_tx_queue) ? "" : "(sending)", - list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)", - list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)", - list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)", - list_empty(&conn->ibc_active_txs) ? "" : "(waiting)"); + libcfs_nid2str(peer->ibp_nid), error, + list_empty(&conn->ibc_tx_queue) ? "" : "(sending)", + list_empty(&conn->ibc_tx_noops) ? "" : "(sending_noops)", + list_empty(&conn->ibc_tx_queue_rsrvd) ? "" : "(sending_rsrvd)", + list_empty(&conn->ibc_tx_queue_nocred) ? "" : "(sending_nocred)", + list_empty(&conn->ibc_active_txs) ? "" : "(waiting)"); } dev = ((kib_net_t *)peer->ibp_ni->ni_data)->ibn_dev; @@ -1865,7 +1935,7 @@ kiblnd_close_conn_locked(kib_conn_t *conn, int error) kiblnd_set_conn_state(conn, IBLND_CONN_CLOSING); - if (error != 0 && + if (error && kiblnd_dev_can_failover(dev)) { list_add_tail(&dev->ibd_fail_list, &kiblnd_data.kib_failed_devs); @@ -1929,8 +1999,7 @@ kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs) if (txs == &conn->ibc_active_txs) { LASSERT(!tx->tx_queued); - LASSERT(tx->tx_waiting || - tx->tx_sending != 0); + LASSERT(tx->tx_waiting || tx->tx_sending); } else { LASSERT(tx->tx_queued); } @@ -1938,7 +2007,7 @@ kiblnd_abort_txs(kib_conn_t *conn, struct list_head *txs) tx->tx_status = -ECONNABORTED; tx->tx_waiting = 0; - if (tx->tx_sending == 0) { + if (!tx->tx_sending) { tx->tx_queued = 0; list_del(&tx->tx_list); list_add(&tx->tx_list, &zombies); @@ -1958,14 +2027,17 @@ kiblnd_finalise_conn(kib_conn_t *conn) kiblnd_set_conn_state(conn, IBLND_CONN_DISCONNECTED); - /* abort_receives moves QP state to IB_QPS_ERR. This is only required + /* + * 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. */ + * rdma_disconnect() does this for free. + */ kiblnd_abort_receives(conn); - /* Complete all tx descs not waiting for sends to complete. - * NB we should be safe from RDMA now that the QP has changed state */ - + /* + * Complete all tx descs not waiting for sends to complete. + * NB we should be safe from RDMA now that the QP has changed state + */ kiblnd_abort_txs(conn, &conn->ibc_tx_noops); kiblnd_abort_txs(conn, &conn->ibc_tx_queue); kiblnd_abort_txs(conn, &conn->ibc_tx_queue_rsrvd); @@ -1975,13 +2047,13 @@ kiblnd_finalise_conn(kib_conn_t *conn) kiblnd_handle_early_rxs(conn); } -void +static void kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error) { LIST_HEAD(zombies); unsigned long flags; - LASSERT(error != 0); + LASSERT(error); LASSERT(!in_interrupt()); write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); @@ -1994,14 +2066,14 @@ kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error) peer->ibp_accepting--; } - if (peer->ibp_connecting != 0 || - peer->ibp_accepting != 0) { + if (kiblnd_peer_connecting(peer)) { /* another connection attempt under way... */ write_unlock_irqrestore(&kiblnd_data.kib_global_lock, - flags); + 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); @@ -2029,7 +2101,7 @@ kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error) kiblnd_txlist_done(peer->ibp_ni, &zombies, -EHOSTUNREACH); } -void +static void kiblnd_connreq_done(kib_conn_t *conn, int status) { kib_peer_t *peer = conn->ibc_peer; @@ -2047,14 +2119,14 @@ kiblnd_connreq_done(kib_conn_t *conn, int status) LASSERT(!in_interrupt()); LASSERT((conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT && - peer->ibp_connecting > 0) || + peer->ibp_connecting > 0) || (conn->ibc_state == IBLND_CONN_PASSIVE_WAIT && - peer->ibp_accepting > 0)); + peer->ibp_accepting > 0)); LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars)); conn->ibc_connvars = NULL; - if (status != 0) { + if (status) { /* failed to establish connection */ kiblnd_peer_connect_failed(peer, active, status); kiblnd_finalise_conn(conn); @@ -2068,16 +2140,19 @@ kiblnd_connreq_done(kib_conn_t *conn, int status) kiblnd_set_conn_state(conn, IBLND_CONN_ESTABLISHED); kiblnd_peer_alive(peer); - /* Add conn to peer's list and nuke any dangling conns from a different - * peer instance... */ + /* + * Add conn to peer's list and nuke any dangling conns from a different + * peer instance... + */ kiblnd_conn_addref(conn); /* +1 ref for ibc_list */ list_add(&conn->ibc_list, &peer->ibp_conns); + peer->ibp_reconnected = 0; if (active) peer->ibp_connecting--; else peer->ibp_accepting--; - if (peer->ibp_version == 0) { + if (!peer->ibp_version) { peer->ibp_version = conn->ibc_version; peer->ibp_incarnation = conn->ibc_incarnation; } @@ -2095,7 +2170,7 @@ kiblnd_connreq_done(kib_conn_t *conn, int status) list_del_init(&peer->ibp_tx_queue); if (!kiblnd_peer_active(peer) || /* peer has been deleted */ - conn->ibc_comms_error != 0) { /* error has happened already */ + conn->ibc_comms_error) { /* error has happened already */ lnet_ni_t *ni = peer->ibp_ni; /* start to shut down connection */ @@ -2107,6 +2182,16 @@ kiblnd_connreq_done(kib_conn_t *conn, int status) return; } + /** + * refcount taken by cmid is not reliable after I released the glock + * because this connection is visible to other threads now, another + * thread can find and close this connection right after I released + * the glock, if kiblnd_cm_callback for RDMA_CM_EVENT_DISCONNECTED is + * called, it can release the connection refcount taken by cmid. + * It means the connection could be destroyed before I finish my + * operations on it. + */ + kiblnd_conn_addref(conn); write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); /* Schedule blocked txs */ @@ -2122,6 +2207,8 @@ kiblnd_connreq_done(kib_conn_t *conn, int status) /* schedule blocked rxs */ kiblnd_handle_early_rxs(conn); + + kiblnd_conn_decref(conn); } static void @@ -2131,7 +2218,7 @@ kiblnd_reject(struct rdma_cm_id *cmid, kib_rej_t *rej) rc = rdma_reject(cmid, rej, sizeof(*rej)); - if (rc != 0) + if (rc) CWARN("Error %d sending reject\n", rc); } @@ -2159,14 +2246,14 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) /* cmid inherits 'context' from the corresponding listener id */ ibdev = (kib_dev_t *)cmid->context; - LASSERT(ibdev != NULL); + LASSERT(ibdev); memset(&rej, 0, sizeof(rej)); rej.ibr_magic = IBLND_MSG_MAGIC; rej.ibr_why = IBLND_REJECT_FATAL; rej.ibr_cp.ibcp_max_msg_size = IBLND_MSG_SIZE; - peer_addr = (struct sockaddr_in *)&(cmid->route.addr.dst_addr); + 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); @@ -2181,12 +2268,14 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) goto failed; } - /* Future protocol version compatibility support! If the + /* + * 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. */ + * speak. + */ if (reqmsg->ibm_magic == LNET_PROTO_MAGIC || reqmsg->ibm_magic == __swab32(LNET_PROTO_MAGIC)) goto failed; @@ -2200,7 +2289,7 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) goto failed; rc = kiblnd_unpack_msg(reqmsg, priv_nob); - if (rc != 0) { + if (rc) { CERROR("Can't parse connection request: %d\n", rc); goto failed; } @@ -2208,17 +2297,17 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) nid = reqmsg->ibm_srcnid; ni = lnet_net2ni(LNET_NIDNET(reqmsg->ibm_dstnid)); - if (ni != NULL) { + if (ni) { net = (kib_net_t *)ni->ni_data; rej.ibr_incarnation = net->ibn_incarnation; } - if (ni == NULL || /* no matching net */ + if (!ni || /* no matching net */ ni->ni_nid != reqmsg->ibm_dstnid || /* right NET, wrong NID! */ net->ibn_dev != ibdev) { /* wrong device */ - CERROR("Can't accept %s on %s (%s:%d:%pI4h): bad dst nid %s\n", + 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), + !ni ? "NA" : libcfs_nid2str(ni->ni_nid), ibdev->ibd_ifname, ibdev->ibd_nnets, &ibdev->ibd_ifip, libcfs_nid2str(reqmsg->ibm_dstnid)); @@ -2227,7 +2316,7 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) } /* check time stamp as soon as possible */ - if (reqmsg->ibm_dststamp != 0 && + if (reqmsg->ibm_dststamp && reqmsg->ibm_dststamp != net->ibn_incarnation) { CWARN("Stale connection request\n"); rej.ibr_why = IBLND_REJECT_CONN_STALE; @@ -2243,10 +2332,11 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) goto failed; } - if (reqmsg->ibm_u.connparams.ibcp_queue_depth != + if (reqmsg->ibm_u.connparams.ibcp_queue_depth > IBLND_MSG_QUEUE_SIZE(version)) { - CERROR("Can't accept %s: incompatible queue depth %d (%d wanted)\n", - libcfs_nid2str(nid), reqmsg->ibm_u.connparams.ibcp_queue_depth, + CERROR("Can't accept conn from %s, queue depth too large: %d (<=%d wanted)\n", + libcfs_nid2str(nid), + reqmsg->ibm_u.connparams.ibcp_queue_depth, IBLND_MSG_QUEUE_SIZE(version)); if (version == IBLND_MSG_VERSION) @@ -2255,18 +2345,28 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) goto failed; } - if (reqmsg->ibm_u.connparams.ibcp_max_frags != + if (reqmsg->ibm_u.connparams.ibcp_max_frags > IBLND_RDMA_FRAGS(version)) { - CERROR("Can't accept %s(version %x): incompatible max_frags %d (%d wanted)\n", - libcfs_nid2str(nid), version, - reqmsg->ibm_u.connparams.ibcp_max_frags, - IBLND_RDMA_FRAGS(version)); + CWARN("Can't accept conn from %s (version %x): max_frags %d too large (%d wanted)\n", + libcfs_nid2str(nid), version, + reqmsg->ibm_u.connparams.ibcp_max_frags, + IBLND_RDMA_FRAGS(version)); - if (version == IBLND_MSG_VERSION) + if (version >= IBLND_MSG_VERSION) rej.ibr_why = IBLND_REJECT_RDMA_FRAGS; goto failed; + } else if (reqmsg->ibm_u.connparams.ibcp_max_frags < + IBLND_RDMA_FRAGS(version) && !net->ibn_fmr_ps) { + CWARN("Can't accept conn from %s (version %x): max_frags %d incompatible without FMR pool (%d wanted)\n", + libcfs_nid2str(nid), version, + reqmsg->ibm_u.connparams.ibcp_max_frags, + IBLND_RDMA_FRAGS(version)); + + if (version >= IBLND_MSG_VERSION) + rej.ibr_why = IBLND_REJECT_RDMA_FRAGS; + goto failed; } if (reqmsg->ibm_u.connparams.ibcp_max_msg_size > IBLND_MSG_SIZE) { @@ -2279,17 +2379,21 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) /* assume 'nid' is a new peer; create */ rc = kiblnd_create_peer(ni, &peer, nid); - if (rc != 0) { + if (rc) { CERROR("Can't create peer for %s\n", libcfs_nid2str(nid)); rej.ibr_why = IBLND_REJECT_NO_RESOURCES; goto failed; } + /* We have validated the peer's parameters so use those */ + peer->ibp_max_frags = reqmsg->ibm_u.connparams.ibcp_max_frags; + peer->ibp_queue_depth = reqmsg->ibm_u.connparams.ibcp_queue_depth; + write_lock_irqsave(g_lock, flags); peer2 = kiblnd_find_peer_locked(nid); - if (peer2 != NULL) { - if (peer2->ibp_version == 0) { + if (peer2) { + if (!peer2->ibp_version) { peer2->ibp_version = version; peer2->ibp_incarnation = reqmsg->ibm_srcstamp; } @@ -2298,10 +2402,16 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) if (peer2->ibp_incarnation != reqmsg->ibm_srcstamp || peer2->ibp_version != version) { kiblnd_close_peer_conns_locked(peer2, -ESTALE); + + if (kiblnd_peer_active(peer2)) { + peer2->ibp_incarnation = reqmsg->ibm_srcstamp; + peer2->ibp_version = version; + } write_unlock_irqrestore(g_lock, flags); - CWARN("Conn stale %s [old ver: %x, new ver: %x]\n", - libcfs_nid2str(nid), peer2->ibp_version, version); + 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; @@ -2309,7 +2419,7 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) } /* tie-break connection race in favour of the higher NID */ - if (peer2->ibp_connecting != 0 && + if (peer2->ibp_connecting && nid < ni->ni_nid) { write_unlock_irqrestore(g_lock, flags); @@ -2320,24 +2430,37 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) goto failed; } + /** + * passive connection is allowed even this peer is waiting for + * reconnection. + */ + peer2->ibp_reconnecting = 0; peer2->ibp_accepting++; kiblnd_peer_addref(peer2); + /** + * Race with kiblnd_launch_tx (active connect) to create peer + * so copy validated parameters since we now know what the + * peer's limits are + */ + peer2->ibp_max_frags = peer->ibp_max_frags; + peer2->ibp_queue_depth = peer->ibp_queue_depth; + write_unlock_irqrestore(g_lock, flags); kiblnd_peer_decref(peer); peer = peer2; } else { /* Brand new peer */ - LASSERT(peer->ibp_accepting == 0); - LASSERT(peer->ibp_version == 0 && - peer->ibp_incarnation == 0); + LASSERT(!peer->ibp_accepting); + LASSERT(!peer->ibp_version && + !peer->ibp_incarnation); peer->ibp_accepting = 1; peer->ibp_version = version; peer->ibp_incarnation = reqmsg->ibm_srcstamp; /* I have a ref on ni that prevents it being shutdown */ - LASSERT(net->ibn_shutdown == 0); + LASSERT(!net->ibn_shutdown); kiblnd_peer_addref(peer); list_add_tail(&peer->ibp_list, kiblnd_nid2peerlist(nid)); @@ -2345,31 +2468,33 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) write_unlock_irqrestore(g_lock, flags); } - conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, version); - if (conn == NULL) { + conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_PASSIVE_WAIT, + version); + if (!conn) { kiblnd_peer_connect_failed(peer, 0, -ENOMEM); kiblnd_peer_decref(peer); rej.ibr_why = IBLND_REJECT_NO_RESOURCES; goto failed; } - /* conn now "owns" cmid, so I return success from here on to ensure the - * CM callback doesn't destroy cmid. */ - + /* + * conn 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 = IBLND_MSG_QUEUE_SIZE(version); - conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(version); - LASSERT(conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(version) - <= IBLND_RX_MSGS(version)); + conn->ibc_credits = conn->ibc_queue_depth; + conn->ibc_reserved_credits = conn->ibc_queue_depth; + LASSERT(conn->ibc_credits + conn->ibc_reserved_credits + + IBLND_OOB_MSGS(version) <= IBLND_RX_MSGS(conn)); ackmsg = &conn->ibc_connvars->cv_msg; memset(ackmsg, 0, sizeof(*ackmsg)); kiblnd_init_msg(ackmsg, IBLND_MSG_CONNACK, sizeof(ackmsg->ibm_u.connparams)); - ackmsg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); + 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; - ackmsg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version); kiblnd_pack_msg(ni, ackmsg, version, 0, nid, reqmsg->ibm_srcstamp); @@ -2385,7 +2510,7 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) CDEBUG(D_NET, "Accept %s\n", libcfs_nid2str(nid)); rc = rdma_accept(cmid, &cp); - if (rc != 0) { + if (rc) { CERROR("Can't accept %s: %d\n", libcfs_nid2str(nid), rc); rej.ibr_version = version; rej.ibr_why = IBLND_REJECT_FATAL; @@ -2399,7 +2524,7 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) return 0; failed: - if (ni != NULL) + if (ni) lnet_ni_decref(ni); rej.ibr_version = version; @@ -2411,45 +2536,82 @@ kiblnd_passive_connect(struct rdma_cm_id *cmid, void *priv, int priv_nob) } static void -kiblnd_reconnect(kib_conn_t *conn, int version, - __u64 incarnation, int why, kib_connparams_t *cp) +kiblnd_check_reconnect(kib_conn_t *conn, int version, + __u64 incarnation, int why, kib_connparams_t *cp) { + rwlock_t *glock = &kiblnd_data.kib_global_lock; kib_peer_t *peer = conn->ibc_peer; char *reason; - int retry = 0; + int msg_size = IBLND_MSG_SIZE; + int frag_num = -1; + int queue_dep = -1; + bool reconnect; unsigned long flags; LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT); LASSERT(peer->ibp_connecting > 0); /* 'conn' at least */ + LASSERT(!peer->ibp_reconnecting); - write_lock_irqsave(&kiblnd_data.kib_global_lock, flags); + if (cp) { + msg_size = cp->ibcp_max_msg_size; + frag_num = cp->ibcp_max_frags; + queue_dep = cp->ibcp_queue_depth; + } - /* retry connection if it's still needed and no other connection + 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() */ - if ((!list_empty(&peer->ibp_tx_queue) || - peer->ibp_version != version) && - peer->ibp_connecting == 1 && - peer->ibp_accepting == 0) { - retry = 1; - peer->ibp_connecting++; - - peer->ibp_version = version; - peer->ibp_incarnation = incarnation; + * initiated by kiblnd_query() + */ + reconnect = (!list_empty(&peer->ibp_tx_queue) || + peer->ibp_version != version) && + peer->ibp_connecting == 1 && + !peer->ibp_accepting; + if (!reconnect) { + reason = "no need"; + goto out; } - write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - - if (!retry) - return; - switch (why) { default: reason = "Unknown"; break; + case IBLND_REJECT_RDMA_FRAGS: + if (!cp) { + reason = "can't negotiate max frags"; + goto out; + } + if (!*kiblnd_tunables.kib_map_on_demand) { + 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; + reason = "rdma fragments"; + break; + + case IBLND_REJECT_MSG_QUEUE_SIZE: + if (!cp) { + reason = "can't negotiate queue depth"; + goto out; + } + if (conn->ibc_queue_depth <= queue_dep) { + reason = "unsupported queue depth"; + goto out; + } + + peer->ibp_queue_depth = queue_dep; + reason = "queue depth"; + break; + case IBLND_REJECT_CONN_STALE: reason = "stale"; break; @@ -2463,14 +2625,24 @@ kiblnd_reconnect(kib_conn_t *conn, int version, break; } - CNETERR("%s: retrying (%s), %x, %x, queue_dep: %d, max_frag: %d, msg_size: %d\n", - libcfs_nid2str(peer->ibp_nid), - reason, IBLND_MSG_VERSION, version, - cp != NULL ? cp->ibcp_queue_depth : IBLND_MSG_QUEUE_SIZE(version), - cp != NULL ? cp->ibcp_max_frags : IBLND_RDMA_FRAGS(version), - cp != NULL ? cp->ibcp_max_msg_size : IBLND_MSG_SIZE); + conn->ibc_reconnect = 1; + peer->ibp_reconnecting = 1; + peer->ibp_version = version; + if (incarnation) + peer->ibp_incarnation = incarnation; +out: + write_unlock_irqrestore(glock, flags); - kiblnd_connect_peer(peer); + CNETERR("%s: %s (%s), %x, %x, msg_size: %d, queue_depth: %d/%d, max_frags: %d/%d\n", + libcfs_nid2str(peer->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 + * while destroying the zombie + */ } static void @@ -2483,8 +2655,8 @@ kiblnd_rejected(kib_conn_t *conn, int reason, void *priv, int priv_nob) switch (reason) { case IB_CM_REJ_STALE_CONN: - kiblnd_reconnect(conn, IBLND_MSG_VERSION, 0, - IBLND_REJECT_CONN_STALE, NULL); + kiblnd_check_reconnect(conn, IBLND_MSG_VERSION, 0, + IBLND_REJECT_CONN_STALE, NULL); break; case IB_CM_REJ_INVALID_SERVICE_ID: @@ -2521,9 +2693,11 @@ kiblnd_rejected(kib_conn_t *conn, int reason, void *priv, int priv_nob) if (priv_nob >= sizeof(kib_rej_t) && rej->ibr_version > IBLND_MSG_VERSION_1) { - /* priv_nob is always 148 in current version + /* + * 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) */ + * (define of IB_CM_REJ_PRIVATE_DATA_SIZE) + */ cp = &rej->ibr_cp; if (flip) { @@ -2564,24 +2738,11 @@ kiblnd_rejected(kib_conn_t *conn, int reason, void *priv, int priv_nob) case IBLND_REJECT_CONN_RACE: case IBLND_REJECT_CONN_STALE: case IBLND_REJECT_CONN_UNCOMPAT: - kiblnd_reconnect(conn, rej->ibr_version, - incarnation, rej->ibr_why, cp); - break; - case IBLND_REJECT_MSG_QUEUE_SIZE: - CERROR("%s rejected: incompatible message queue depth %d, %d\n", - libcfs_nid2str(peer->ibp_nid), - cp != NULL ? cp->ibcp_queue_depth : - IBLND_MSG_QUEUE_SIZE(rej->ibr_version), - IBLND_MSG_QUEUE_SIZE(conn->ibc_version)); - break; - case IBLND_REJECT_RDMA_FRAGS: - CERROR("%s rejected: incompatible # of RDMA fragments %d, %d\n", - libcfs_nid2str(peer->ibp_nid), - cp != NULL ? cp->ibcp_max_frags : - IBLND_RDMA_FRAGS(rej->ibr_version), - IBLND_RDMA_FRAGS(conn->ibc_version)); + kiblnd_check_reconnect(conn, rej->ibr_version, + incarnation, + rej->ibr_why, cp); break; case IBLND_REJECT_NO_RESOURCES: @@ -2623,9 +2784,9 @@ kiblnd_check_connreply(kib_conn_t *conn, void *priv, int priv_nob) int rc = kiblnd_unpack_msg(msg, priv_nob); unsigned long flags; - LASSERT(net != NULL); + LASSERT(net); - if (rc != 0) { + if (rc) { CERROR("Can't unpack connack from %s: %d\n", libcfs_nid2str(peer->ibp_nid), rc); goto failed; @@ -2645,22 +2806,22 @@ kiblnd_check_connreply(kib_conn_t *conn, void *priv, int priv_nob) goto failed; } - if (msg->ibm_u.connparams.ibcp_queue_depth != - IBLND_MSG_QUEUE_SIZE(ver)) { - CERROR("%s has incompatible queue depth %d(%d wanted)\n", + if (msg->ibm_u.connparams.ibcp_queue_depth > + conn->ibc_queue_depth) { + CERROR("%s has incompatible queue depth %d (<=%d wanted)\n", libcfs_nid2str(peer->ibp_nid), msg->ibm_u.connparams.ibcp_queue_depth, - IBLND_MSG_QUEUE_SIZE(ver)); + conn->ibc_queue_depth); rc = -EPROTO; goto failed; } - if (msg->ibm_u.connparams.ibcp_max_frags != - IBLND_RDMA_FRAGS(ver)) { - CERROR("%s has incompatible max_frags %d (%d wanted)\n", + if (msg->ibm_u.connparams.ibcp_max_frags > + conn->ibc_max_frags) { + CERROR("%s has incompatible max_frags %d (<=%d wanted)\n", libcfs_nid2str(peer->ibp_nid), msg->ibm_u.connparams.ibcp_max_frags, - IBLND_RDMA_FRAGS(ver)); + conn->ibc_max_frags); rc = -EPROTO; goto failed; } @@ -2682,7 +2843,7 @@ kiblnd_check_connreply(kib_conn_t *conn, void *priv, int priv_nob) rc = -ESTALE; read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - if (rc != 0) { + if (rc) { CERROR("Bad connection reply from %s, rc = %d, version: %x max_frags: %d\n", libcfs_nid2str(peer->ibp_nid), rc, msg->ibm_version, msg->ibm_u.connparams.ibcp_max_frags); @@ -2690,21 +2851,24 @@ kiblnd_check_connreply(kib_conn_t *conn, void *priv, int priv_nob) } conn->ibc_incarnation = msg->ibm_srcstamp; - conn->ibc_credits = - conn->ibc_reserved_credits = IBLND_MSG_QUEUE_SIZE(ver); - LASSERT(conn->ibc_credits + conn->ibc_reserved_credits + IBLND_OOB_MSGS(ver) - <= IBLND_RX_MSGS(ver)); + conn->ibc_credits = msg->ibm_u.connparams.ibcp_queue_depth; + conn->ibc_reserved_credits = msg->ibm_u.connparams.ibcp_queue_depth; + conn->ibc_queue_depth = msg->ibm_u.connparams.ibcp_queue_depth; + conn->ibc_max_frags = msg->ibm_u.connparams.ibcp_max_frags; + LASSERT(conn->ibc_credits + conn->ibc_reserved_credits + + IBLND_OOB_MSGS(ver) <= IBLND_RX_MSGS(conn)); kiblnd_connreq_done(conn, 0); return; failed: - /* NB My QP has already established itself, so I handle anything going + /* + * NB My QP has already established itself, so I handle anything going * wrong here by setting ibc_comms_error. * kiblnd_connreq_done(0) moves the conn state to ESTABLISHED, but then - * immediately tears it down. */ - - LASSERT(rc != 0); + * immediately tears it down. + */ + LASSERT(rc); conn->ibc_comms_error = rc; kiblnd_connreq_done(conn, 0); } @@ -2724,28 +2888,30 @@ 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; + version = !peer->ibp_version ? IBLND_MSG_VERSION : + peer->ibp_version; read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT, version); - if (conn == NULL) { + conn = kiblnd_create_conn(peer, cmid, IBLND_CONN_ACTIVE_CONNECT, + version); + if (!conn) { kiblnd_peer_connect_failed(peer, 1, -ENOMEM); kiblnd_peer_decref(peer); /* lose cmid's ref */ return -ENOMEM; } - /* conn "owns" cmid now, so I return success from here on to ensure the + /* + * 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 + */ msg = &conn->ibc_connvars->cv_msg; memset(msg, 0, sizeof(*msg)); kiblnd_init_msg(msg, IBLND_MSG_CONNREQ, sizeof(msg->ibm_u.connparams)); - msg->ibm_u.connparams.ibcp_queue_depth = IBLND_MSG_QUEUE_SIZE(version); - msg->ibm_u.connparams.ibcp_max_frags = IBLND_RDMA_FRAGS(version); + msg->ibm_u.connparams.ibcp_queue_depth = conn->ibc_queue_depth; + msg->ibm_u.connparams.ibcp_max_frags = conn->ibc_max_frags; msg->ibm_u.connparams.ibcp_max_msg_size = IBLND_MSG_SIZE; kiblnd_pack_msg(peer->ibp_ni, msg, version, @@ -2764,7 +2930,7 @@ kiblnd_active_connect(struct rdma_cm_id *cmid) LASSERT(conn->ibc_cmid == cmid); rc = rdma_connect(cmid, &cp); - if (rc != 0) { + if (rc) { CERROR("Can't connect to %s: %d\n", libcfs_nid2str(peer->ibp_nid), rc); kiblnd_connreq_done(conn, rc); @@ -2798,10 +2964,10 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) 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); + libcfs_nid2str(peer->ibp_nid), event->status); kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH); kiblnd_peer_decref(peer); - return -EHOSTUNREACH; /* rc != 0 destroys cmid */ + return -EHOSTUNREACH; /* rc destroys cmid */ case RDMA_CM_EVENT_ADDR_RESOLVED: peer = (kib_peer_t *)cmid->context; @@ -2809,14 +2975,14 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) CDEBUG(D_NET, "%s Addr resolved: %d\n", libcfs_nid2str(peer->ibp_nid), event->status); - if (event->status != 0) { + if (event->status) { CNETERR("Can't resolve address for %s: %d\n", libcfs_nid2str(peer->ibp_nid), event->status); rc = event->status; } else { rc = rdma_resolve_route( cmid, *kiblnd_tunables.kib_timeout * 1000); - if (rc == 0) + if (!rc) return 0; /* Can't initiate route resolution */ CERROR("Can't resolve route for %s: %d\n", @@ -2824,7 +2990,7 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) } kiblnd_peer_connect_failed(peer, 1, rc); kiblnd_peer_decref(peer); - return rc; /* rc != 0 destroys cmid */ + return rc; /* rc destroys cmid */ case RDMA_CM_EVENT_ROUTE_ERROR: peer = (kib_peer_t *)cmid->context; @@ -2832,28 +2998,28 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) libcfs_nid2str(peer->ibp_nid), event->status); kiblnd_peer_connect_failed(peer, 1, -EHOSTUNREACH); kiblnd_peer_decref(peer); - return -EHOSTUNREACH; /* rc != 0 destroys cmid */ + return -EHOSTUNREACH; /* rc destroys cmid */ case RDMA_CM_EVENT_ROUTE_RESOLVED: peer = (kib_peer_t *)cmid->context; CDEBUG(D_NET, "%s Route resolved: %d\n", libcfs_nid2str(peer->ibp_nid), event->status); - if (event->status == 0) + if (!event->status) return kiblnd_active_connect(cmid); CNETERR("Can't resolve route for %s: %d\n", - libcfs_nid2str(peer->ibp_nid), event->status); + libcfs_nid2str(peer->ibp_nid), event->status); kiblnd_peer_connect_failed(peer, 1, event->status); kiblnd_peer_decref(peer); - return event->status; /* rc != 0 destroys cmid */ + return event->status; /* rc destroys cmid */ case RDMA_CM_EVENT_UNREACHABLE: conn = (kib_conn_t *)cmid->context; LASSERT(conn->ibc_state == IBLND_CONN_ACTIVE_CONNECT || conn->ibc_state == IBLND_CONN_PASSIVE_WAIT); CNETERR("%s: UNREACHABLE %d\n", - libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status); + libcfs_nid2str(conn->ibc_peer->ibp_nid), event->status); kiblnd_connreq_done(conn, -ENETDOWN); kiblnd_conn_decref(conn); return 0; @@ -2876,8 +3042,8 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) case IBLND_CONN_PASSIVE_WAIT: CERROR("%s: REJECTED %d\n", - libcfs_nid2str(conn->ibc_peer->ibp_nid), - event->status); + libcfs_nid2str(conn->ibc_peer->ibp_nid), + event->status); kiblnd_connreq_done(conn, -ECONNRESET); break; @@ -2933,8 +3099,10 @@ kiblnd_cm_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event) LCONSOLE_ERROR_MSG(0x131, "Received notification of device removal\n" "Please shutdown LNET to allow this to proceed\n"); - /* Can't remove network from underneath LNET for now, so I have - * to ignore this */ + /* + * Can't remove network from underneath LNET for now, so I have + * to ignore this + */ return 0; case RDMA_CM_EVENT_ADDR_CHANGE: @@ -2956,7 +3124,7 @@ kiblnd_check_txs_locked(kib_conn_t *conn, struct list_head *txs) LASSERT(tx->tx_queued); } else { LASSERT(!tx->tx_queued); - LASSERT(tx->tx_waiting || tx->tx_sending != 0); + LASSERT(tx->tx_waiting || tx->tx_sending); } if (cfs_time_aftereq(jiffies, tx->tx_deadline)) { @@ -2989,13 +3157,16 @@ kiblnd_check_conns(int idx) struct list_head *ptmp; kib_peer_t *peer; kib_conn_t *conn; + kib_conn_t *temp; kib_conn_t *tmp; struct list_head *ctmp; unsigned long flags; - /* NB. We expect to have a look at all the peers and not find any + /* + * 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... */ + * take a look... + */ read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); list_for_each(ptmp, peers) { @@ -3028,8 +3199,7 @@ kiblnd_check_conns(int idx) conn->ibc_reserved_credits); list_add(&conn->ibc_connd_list, &closes); } else { - list_add(&conn->ibc_connd_list, - &checksends); + list_add(&conn->ibc_connd_list, &checksends); } /* +ref for 'closes' or 'checksends' */ kiblnd_conn_addref(conn); @@ -3040,21 +3210,23 @@ kiblnd_check_conns(int idx) read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags); - /* Handle timeout by closing the whole + /* + * Handle timeout by closing the whole * connection. We can only be sure RDMA activity - * has ceased once the QP has been modified. */ + * has ceased once the QP has been modified. + */ list_for_each_entry_safe(conn, tmp, &closes, ibc_connd_list) { list_del(&conn->ibc_connd_list); kiblnd_close_conn(conn, -ETIMEDOUT); kiblnd_conn_decref(conn); } - /* In case we have enough credits to return via a + /* + * 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... + */ + list_for_each_entry_safe(conn, temp, &checksends, ibc_connd_list) { list_del(&conn->ibc_connd_list); kiblnd_check_sends(conn); kiblnd_conn_decref(conn); @@ -3074,9 +3246,21 @@ kiblnd_disconnect_conn(kib_conn_t *conn) kiblnd_peer_notify(conn->ibc_peer); } +/** + * High-water for reconnection to the same peer, reconnection attempt should + * be delayed after trying more than KIB_RECONN_HIGH_RACE. + */ +#define KIB_RECONN_HIGH_RACE 10 +/** + * Allow connd to take a break and handle other things after consecutive + * reconnection attemps. + */ +#define KIB_RECONN_BREAK 100 + int kiblnd_connd(void *arg) { + spinlock_t *lock= &kiblnd_data.kib_connd_lock; wait_queue_t wait; unsigned long flags; kib_conn_t *conn; @@ -3091,39 +3275,79 @@ kiblnd_connd(void *arg) init_waitqueue_entry(&wait, current); kiblnd_data.kib_connd = current; - spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); + spin_lock_irqsave(lock, flags); while (!kiblnd_data.kib_shutdown) { + int reconn = 0; dropped_lock = 0; if (!list_empty(&kiblnd_data.kib_connd_zombies)) { + kib_peer_t *peer = NULL; + conn = list_entry(kiblnd_data.kib_connd_zombies.next, - kib_conn_t, ibc_list); + kib_conn_t, ibc_list); list_del(&conn->ibc_list); + if (conn->ibc_reconnect) { + peer = conn->ibc_peer; + kiblnd_peer_addref(peer); + } - spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, - flags); + spin_unlock_irqrestore(lock, flags); dropped_lock = 1; - kiblnd_destroy_conn(conn); + kiblnd_destroy_conn(conn, !peer); + + spin_lock_irqsave(lock, flags); + if (!peer) + continue; - spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); + conn->ibc_peer = peer; + if (peer->ibp_reconnected < KIB_RECONN_HIGH_RACE) + list_add_tail(&conn->ibc_list, + &kiblnd_data.kib_reconn_list); + else + list_add_tail(&conn->ibc_list, + &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); + kib_conn_t, ibc_list); list_del(&conn->ibc_list); - spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, - flags); + spin_unlock_irqrestore(lock, flags); dropped_lock = 1; kiblnd_disconnect_conn(conn); kiblnd_conn_decref(conn); - spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); + spin_lock_irqsave(lock, flags); + } + + while (reconn < KIB_RECONN_BREAK) { + 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)) + 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; + + reconn += kiblnd_reconnect_peer(conn->ibc_peer); + kiblnd_peer_decref(conn->ibc_peer); + LIBCFS_FREE(conn, sizeof(*conn)); + + spin_lock_irqsave(lock, flags); } /* careful with the jiffy wrap... */ @@ -3133,21 +3357,22 @@ kiblnd_connd(void *arg) const int p = 1; int chunk = kiblnd_data.kib_peer_hash_size; - spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); + spin_unlock_irqrestore(lock, flags); dropped_lock = 1; - /* Time to check for RDMA timeouts on a few more + /* + * 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. */ - + * interval. + */ if (*kiblnd_tunables.kib_timeout > n * p) chunk = (chunk * n * p) / *kiblnd_tunables.kib_timeout; - if (chunk == 0) + if (!chunk) chunk = 1; for (i = 0; i < chunk; i++) { @@ -3156,8 +3381,8 @@ kiblnd_connd(void *arg) kiblnd_data.kib_peer_hash_size; } - deadline += p * HZ; - spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); + deadline += msecs_to_jiffies(p * MSEC_PER_SEC); + spin_lock_irqsave(lock, flags); } if (dropped_lock) @@ -3166,15 +3391,15 @@ kiblnd_connd(void *arg) /* Nothing to do for 'timeout' */ set_current_state(TASK_INTERRUPTIBLE); add_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); - spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); + spin_unlock_irqrestore(lock, flags); schedule_timeout(timeout); remove_wait_queue(&kiblnd_data.kib_connd_waitq, &wait); - spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); + spin_lock_irqsave(lock, flags); } - spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); + spin_unlock_irqrestore(lock, flags); kiblnd_thread_fini(); return 0; @@ -3206,12 +3431,14 @@ kiblnd_complete(struct ib_wc *wc) LBUG(); case IBLND_WID_RDMA: - /* We only get RDMA completion notification if it fails. All + /* + * We only get RDMA completion notification if it fails. All * subsequent work items, including the final SEND will fail * too. However we can't print out any more info about the * failing RDMA because 'tx' might be back on the idle list or * even reused already if we didn't manage to post all our work - * items */ + * items + */ CNETERR("RDMA (tx: %p) failed: %d\n", kiblnd_wreqid2ptr(wc->wr_id), wc->status); return; @@ -3230,11 +3457,13 @@ kiblnd_complete(struct ib_wc *wc) void kiblnd_cq_completion(struct ib_cq *cq, void *arg) { - /* NB I'm not allowed to schedule this conn once its refcount has + /* + * NB I'm not allowed to schedule this conn once its refcount has * reached 0. Since fundamentally I'm racing with scheduler threads * consuming my CQ I could be called after all completions have - * occurred. But in this case, ibc_nrx == 0 && ibc_nsends_posted == 0 - * and this CQ is about to be destroyed so I NOOP. */ + * occurred. But in this case, !ibc_nrx && !ibc_nsends_posted + * and this CQ is about to be destroyed so I NOOP. + */ kib_conn_t *conn = arg; struct kib_sched_info *sched = conn->ibc_sched; unsigned long flags; @@ -3288,7 +3517,7 @@ kiblnd_scheduler(void *arg) sched = kiblnd_data.kib_scheds[KIB_THREAD_CPT(id)]; rc = cfs_cpt_bind(lnet_cpt_table(), sched->ibs_cpt); - if (rc != 0) { + if (rc) { CWARN("Failed to bind on CPT %d, please verify whether all CPUs are healthy and reload modules if necessary, otherwise your system might under risk of low performance\n", sched->ibs_cpt); } @@ -3308,8 +3537,8 @@ kiblnd_scheduler(void *arg) did_something = 0; if (!list_empty(&sched->ibs_conns)) { - conn = list_entry(sched->ibs_conns.next, - kib_conn_t, ibc_sched_list); + conn = list_entry(sched->ibs_conns.next, kib_conn_t, + ibc_sched_list); /* take over kib_sched_conns' ref on conn... */ LASSERT(conn->ibc_scheduled); list_del(&conn->ibc_sched_list); @@ -3317,8 +3546,10 @@ kiblnd_scheduler(void *arg) spin_unlock_irqrestore(&sched->ibs_lock, flags); + wc.wr_id = IBLND_WID_INVAL; + rc = ib_poll_cq(conn->ibc_cq, 1, &wc); - if (rc == 0) { + if (!rc) { rc = ib_req_notify_cq(conn->ibc_cq, IB_CQ_NEXT_COMP); if (rc < 0) { @@ -3327,13 +3558,22 @@ kiblnd_scheduler(void *arg) kiblnd_close_conn(conn, -EIO); kiblnd_conn_decref(conn); spin_lock_irqsave(&sched->ibs_lock, - flags); + flags); continue; } rc = ib_poll_cq(conn->ibc_cq, 1, &wc); } + if (unlikely(rc > 0 && wc.wr_id == IBLND_WID_INVAL)) { + LCONSOLE_ERROR("ib_poll_cq (rc: %d) returned invalid wr_id, opcode %d, status: %d, vendor_err: %d, conn: %s status: %d\nplease upgrade firmware and OFED or contact vendor.\n", + rc, wc.opcode, wc.status, + wc.vendor_err, + libcfs_nid2str(conn->ibc_peer->ibp_nid), + conn->ibc_state); + rc = -EINVAL; + } + if (rc < 0) { CWARN("%s: ib_poll_cq failed: %d, closing connection\n", libcfs_nid2str(conn->ibc_peer->ibp_nid), @@ -3346,21 +3586,23 @@ kiblnd_scheduler(void *arg) spin_lock_irqsave(&sched->ibs_lock, flags); - if (rc != 0 || conn->ibc_ready) { - /* There may be another completion waiting; get + if (rc || conn->ibc_ready) { + /* + * There may be another completion waiting; get * another scheduler to check while I handle - * this one... */ + * this one... + */ /* +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 { conn->ibc_scheduled = 0; } - if (rc != 0) { + if (rc) { spin_unlock_irqrestore(&sched->ibs_lock, flags); kiblnd_complete(&wc); @@ -3400,7 +3642,7 @@ kiblnd_failover_thread(void *arg) unsigned long flags; int rc; - LASSERT(*kiblnd_tunables.kib_dev_failover != 0); + LASSERT(*kiblnd_tunables.kib_dev_failover); cfs_block_allsigs(); @@ -3459,13 +3701,15 @@ kiblnd_failover_thread(void *arg) remove_wait_queue(&kiblnd_data.kib_failover_waitq, &wait); write_lock_irqsave(glock, flags); - if (!long_sleep || rc != 0) + if (!long_sleep || rc) continue; - /* have a long sleep, routine check all active devices, + /* + * 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 */ + * on wrong HCA for ever while there is a bonding failover + */ list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) { if (kiblnd_dev_can_failover(dev)) { list_add_tail(&dev->ibd_fail_list, |