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423 lines
9.5 KiB
423 lines
9.5 KiB
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB |
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/* |
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* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. |
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* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. |
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*/ |
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#include <linux/skbuff.h> |
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#include "rxe.h" |
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#include "rxe_loc.h" |
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/* check that QP matches packet opcode type and is in a valid state */ |
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static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, |
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struct rxe_qp *qp) |
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{ |
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unsigned int pkt_type; |
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if (unlikely(!qp->valid)) |
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goto err1; |
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pkt_type = pkt->opcode & 0xe0; |
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switch (qp_type(qp)) { |
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case IB_QPT_RC: |
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if (unlikely(pkt_type != IB_OPCODE_RC)) { |
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pr_warn_ratelimited("bad qp type\n"); |
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goto err1; |
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} |
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break; |
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case IB_QPT_UC: |
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if (unlikely(pkt_type != IB_OPCODE_UC)) { |
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pr_warn_ratelimited("bad qp type\n"); |
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goto err1; |
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} |
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break; |
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case IB_QPT_UD: |
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case IB_QPT_SMI: |
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case IB_QPT_GSI: |
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if (unlikely(pkt_type != IB_OPCODE_UD)) { |
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pr_warn_ratelimited("bad qp type\n"); |
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goto err1; |
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} |
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break; |
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default: |
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pr_warn_ratelimited("unsupported qp type\n"); |
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goto err1; |
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} |
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if (pkt->mask & RXE_REQ_MASK) { |
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if (unlikely(qp->resp.state != QP_STATE_READY)) |
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goto err1; |
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} else if (unlikely(qp->req.state < QP_STATE_READY || |
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qp->req.state > QP_STATE_DRAINED)) { |
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goto err1; |
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} |
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return 0; |
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err1: |
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return -EINVAL; |
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} |
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static void set_bad_pkey_cntr(struct rxe_port *port) |
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{ |
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spin_lock_bh(&port->port_lock); |
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port->attr.bad_pkey_cntr = min((u32)0xffff, |
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port->attr.bad_pkey_cntr + 1); |
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spin_unlock_bh(&port->port_lock); |
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} |
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static void set_qkey_viol_cntr(struct rxe_port *port) |
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{ |
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spin_lock_bh(&port->port_lock); |
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port->attr.qkey_viol_cntr = min((u32)0xffff, |
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port->attr.qkey_viol_cntr + 1); |
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spin_unlock_bh(&port->port_lock); |
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} |
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static int check_keys(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, |
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u32 qpn, struct rxe_qp *qp) |
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{ |
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struct rxe_port *port = &rxe->port; |
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u16 pkey = bth_pkey(pkt); |
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pkt->pkey_index = 0; |
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if (!pkey_match(pkey, IB_DEFAULT_PKEY_FULL)) { |
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pr_warn_ratelimited("bad pkey = 0x%x\n", pkey); |
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set_bad_pkey_cntr(port); |
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goto err1; |
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} |
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if (qp_type(qp) == IB_QPT_UD || qp_type(qp) == IB_QPT_GSI) { |
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u32 qkey = (qpn == 1) ? GSI_QKEY : qp->attr.qkey; |
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if (unlikely(deth_qkey(pkt) != qkey)) { |
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pr_warn_ratelimited("bad qkey, got 0x%x expected 0x%x for qpn 0x%x\n", |
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deth_qkey(pkt), qkey, qpn); |
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set_qkey_viol_cntr(port); |
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goto err1; |
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} |
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} |
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return 0; |
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err1: |
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return -EINVAL; |
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} |
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static int check_addr(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, |
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struct rxe_qp *qp) |
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{ |
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struct sk_buff *skb = PKT_TO_SKB(pkt); |
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if (qp_type(qp) != IB_QPT_RC && qp_type(qp) != IB_QPT_UC) |
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goto done; |
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if (unlikely(pkt->port_num != qp->attr.port_num)) { |
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pr_warn_ratelimited("port %d != qp port %d\n", |
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pkt->port_num, qp->attr.port_num); |
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goto err1; |
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} |
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if (skb->protocol == htons(ETH_P_IP)) { |
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struct in_addr *saddr = |
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&qp->pri_av.sgid_addr._sockaddr_in.sin_addr; |
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struct in_addr *daddr = |
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&qp->pri_av.dgid_addr._sockaddr_in.sin_addr; |
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if (ip_hdr(skb)->daddr != saddr->s_addr) { |
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pr_warn_ratelimited("dst addr %pI4 != qp source addr %pI4\n", |
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&ip_hdr(skb)->daddr, |
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&saddr->s_addr); |
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goto err1; |
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} |
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if (ip_hdr(skb)->saddr != daddr->s_addr) { |
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pr_warn_ratelimited("source addr %pI4 != qp dst addr %pI4\n", |
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&ip_hdr(skb)->saddr, |
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&daddr->s_addr); |
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goto err1; |
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} |
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} else if (skb->protocol == htons(ETH_P_IPV6)) { |
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struct in6_addr *saddr = |
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&qp->pri_av.sgid_addr._sockaddr_in6.sin6_addr; |
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struct in6_addr *daddr = |
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&qp->pri_av.dgid_addr._sockaddr_in6.sin6_addr; |
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if (memcmp(&ipv6_hdr(skb)->daddr, saddr, sizeof(*saddr))) { |
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pr_warn_ratelimited("dst addr %pI6 != qp source addr %pI6\n", |
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&ipv6_hdr(skb)->daddr, saddr); |
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goto err1; |
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} |
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if (memcmp(&ipv6_hdr(skb)->saddr, daddr, sizeof(*daddr))) { |
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pr_warn_ratelimited("source addr %pI6 != qp dst addr %pI6\n", |
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&ipv6_hdr(skb)->saddr, daddr); |
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goto err1; |
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} |
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} |
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done: |
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return 0; |
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err1: |
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return -EINVAL; |
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} |
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static int hdr_check(struct rxe_pkt_info *pkt) |
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{ |
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struct rxe_dev *rxe = pkt->rxe; |
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struct rxe_port *port = &rxe->port; |
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struct rxe_qp *qp = NULL; |
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u32 qpn = bth_qpn(pkt); |
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int index; |
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int err; |
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if (unlikely(bth_tver(pkt) != BTH_TVER)) { |
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pr_warn_ratelimited("bad tver\n"); |
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goto err1; |
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} |
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if (unlikely(qpn == 0)) { |
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pr_warn_once("QP 0 not supported"); |
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goto err1; |
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} |
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if (qpn != IB_MULTICAST_QPN) { |
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index = (qpn == 1) ? port->qp_gsi_index : qpn; |
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qp = rxe_pool_get_index(&rxe->qp_pool, index); |
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if (unlikely(!qp)) { |
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pr_warn_ratelimited("no qp matches qpn 0x%x\n", qpn); |
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goto err1; |
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} |
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err = check_type_state(rxe, pkt, qp); |
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if (unlikely(err)) |
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goto err2; |
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err = check_addr(rxe, pkt, qp); |
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if (unlikely(err)) |
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goto err2; |
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err = check_keys(rxe, pkt, qpn, qp); |
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if (unlikely(err)) |
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goto err2; |
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} else { |
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if (unlikely((pkt->mask & RXE_GRH_MASK) == 0)) { |
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pr_warn_ratelimited("no grh for mcast qpn\n"); |
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goto err1; |
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} |
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} |
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pkt->qp = qp; |
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return 0; |
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err2: |
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rxe_drop_ref(qp); |
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err1: |
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return -EINVAL; |
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} |
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static inline void rxe_rcv_pkt(struct rxe_pkt_info *pkt, struct sk_buff *skb) |
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{ |
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if (pkt->mask & RXE_REQ_MASK) |
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rxe_resp_queue_pkt(pkt->qp, skb); |
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else |
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rxe_comp_queue_pkt(pkt->qp, skb); |
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} |
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static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb) |
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{ |
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struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); |
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struct rxe_mc_grp *mcg; |
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struct rxe_mc_elem *mce; |
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struct rxe_qp *qp; |
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union ib_gid dgid; |
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int err; |
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if (skb->protocol == htons(ETH_P_IP)) |
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ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, |
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(struct in6_addr *)&dgid); |
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else if (skb->protocol == htons(ETH_P_IPV6)) |
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memcpy(&dgid, &ipv6_hdr(skb)->daddr, sizeof(dgid)); |
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/* lookup mcast group corresponding to mgid, takes a ref */ |
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mcg = rxe_pool_get_key(&rxe->mc_grp_pool, &dgid); |
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if (!mcg) |
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goto drop; /* mcast group not registered */ |
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spin_lock_bh(&mcg->mcg_lock); |
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/* this is unreliable datagram service so we let |
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* failures to deliver a multicast packet to a |
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* single QP happen and just move on and try |
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* the rest of them on the list |
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*/ |
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list_for_each_entry(mce, &mcg->qp_list, qp_list) { |
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qp = mce->qp; |
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/* validate qp for incoming packet */ |
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err = check_type_state(rxe, pkt, qp); |
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if (err) |
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continue; |
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err = check_keys(rxe, pkt, bth_qpn(pkt), qp); |
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if (err) |
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continue; |
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/* for all but the last QP create a new clone of the |
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* skb and pass to the QP. Pass the original skb to |
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* the last QP in the list. |
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*/ |
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if (mce->qp_list.next != &mcg->qp_list) { |
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struct sk_buff *cskb; |
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struct rxe_pkt_info *cpkt; |
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cskb = skb_clone(skb, GFP_ATOMIC); |
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if (unlikely(!cskb)) |
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continue; |
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if (WARN_ON(!ib_device_try_get(&rxe->ib_dev))) { |
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kfree_skb(cskb); |
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break; |
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} |
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cpkt = SKB_TO_PKT(cskb); |
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cpkt->qp = qp; |
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rxe_add_ref(qp); |
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rxe_rcv_pkt(cpkt, cskb); |
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} else { |
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pkt->qp = qp; |
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rxe_add_ref(qp); |
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rxe_rcv_pkt(pkt, skb); |
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skb = NULL; /* mark consumed */ |
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} |
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} |
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spin_unlock_bh(&mcg->mcg_lock); |
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rxe_drop_ref(mcg); /* drop ref from rxe_pool_get_key. */ |
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if (likely(!skb)) |
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return; |
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/* This only occurs if one of the checks fails on the last |
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* QP in the list above |
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*/ |
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drop: |
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kfree_skb(skb); |
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ib_device_put(&rxe->ib_dev); |
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} |
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/** |
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* rxe_chk_dgid - validate destination IP address |
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* @rxe: rxe device that received packet |
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* @skb: the received packet buffer |
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* |
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* Accept any loopback packets |
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* Extract IP address from packet and |
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* Accept if multicast packet |
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* Accept if matches an SGID table entry |
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*/ |
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static int rxe_chk_dgid(struct rxe_dev *rxe, struct sk_buff *skb) |
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{ |
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struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); |
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const struct ib_gid_attr *gid_attr; |
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union ib_gid dgid; |
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union ib_gid *pdgid; |
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if (pkt->mask & RXE_LOOPBACK_MASK) |
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return 0; |
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if (skb->protocol == htons(ETH_P_IP)) { |
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ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, |
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(struct in6_addr *)&dgid); |
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pdgid = &dgid; |
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} else { |
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pdgid = (union ib_gid *)&ipv6_hdr(skb)->daddr; |
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} |
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if (rdma_is_multicast_addr((struct in6_addr *)pdgid)) |
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return 0; |
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gid_attr = rdma_find_gid_by_port(&rxe->ib_dev, pdgid, |
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IB_GID_TYPE_ROCE_UDP_ENCAP, |
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1, skb->dev); |
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if (IS_ERR(gid_attr)) |
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return PTR_ERR(gid_attr); |
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rdma_put_gid_attr(gid_attr); |
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return 0; |
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} |
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/* rxe_rcv is called from the interface driver */ |
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void rxe_rcv(struct sk_buff *skb) |
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{ |
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int err; |
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struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); |
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struct rxe_dev *rxe = pkt->rxe; |
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__be32 *icrcp; |
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u32 calc_icrc, pack_icrc; |
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if (unlikely(skb->len < RXE_BTH_BYTES)) |
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goto drop; |
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if (rxe_chk_dgid(rxe, skb) < 0) { |
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pr_warn_ratelimited("failed checking dgid\n"); |
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goto drop; |
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} |
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pkt->opcode = bth_opcode(pkt); |
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pkt->psn = bth_psn(pkt); |
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pkt->qp = NULL; |
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pkt->mask |= rxe_opcode[pkt->opcode].mask; |
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if (unlikely(skb->len < header_size(pkt))) |
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goto drop; |
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err = hdr_check(pkt); |
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if (unlikely(err)) |
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goto drop; |
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/* Verify ICRC */ |
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icrcp = (__be32 *)(pkt->hdr + pkt->paylen - RXE_ICRC_SIZE); |
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pack_icrc = be32_to_cpu(*icrcp); |
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calc_icrc = rxe_icrc_hdr(pkt, skb); |
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calc_icrc = rxe_crc32(rxe, calc_icrc, (u8 *)payload_addr(pkt), |
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payload_size(pkt) + bth_pad(pkt)); |
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calc_icrc = (__force u32)cpu_to_be32(~calc_icrc); |
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if (unlikely(calc_icrc != pack_icrc)) { |
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if (skb->protocol == htons(ETH_P_IPV6)) |
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pr_warn_ratelimited("bad ICRC from %pI6c\n", |
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&ipv6_hdr(skb)->saddr); |
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else if (skb->protocol == htons(ETH_P_IP)) |
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pr_warn_ratelimited("bad ICRC from %pI4\n", |
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&ip_hdr(skb)->saddr); |
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else |
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pr_warn_ratelimited("bad ICRC from unknown\n"); |
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goto drop; |
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} |
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rxe_counter_inc(rxe, RXE_CNT_RCVD_PKTS); |
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if (unlikely(bth_qpn(pkt) == IB_MULTICAST_QPN)) |
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rxe_rcv_mcast_pkt(rxe, skb); |
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else |
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rxe_rcv_pkt(pkt, skb); |
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return; |
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drop: |
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if (pkt->qp) |
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rxe_drop_ref(pkt->qp); |
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kfree_skb(skb); |
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ib_device_put(&rxe->ib_dev); |
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}
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