433 lines
10 KiB
C
433 lines
10 KiB
C
/*
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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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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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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int i;
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int found_pkey = 0;
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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 (qpn == 1) {
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for (i = 0; i < port->attr.pkey_tbl_len; i++) {
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if (pkey_match(pkey, port->pkey_tbl[i])) {
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pkt->pkey_index = i;
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found_pkey = 1;
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break;
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}
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}
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if (!found_pkey) {
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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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} else if (qpn != 0) {
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if (unlikely(!pkey_match(pkey,
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port->pkey_tbl[qp->attr.pkey_index]
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))) {
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pr_warn_ratelimited("bad pkey = 0x%0x\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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pkt->pkey_index = qp->attr.pkey_index;
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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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qpn != 0 && pkt->mask) {
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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_dev *rxe,
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struct rxe_pkt_info *pkt,
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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(rxe, pkt->qp, skb);
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else
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rxe_comp_queue_pkt(rxe, 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 err1; /* mcast group not registered */
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spin_lock_bh(&mcg->mcg_lock);
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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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pkt = SKB_TO_PKT(skb);
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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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/* if *not* the last qp in the list
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* increase the users of the skb then post to the next qp
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*/
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if (mce->qp_list.next != &mcg->qp_list)
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skb_get(skb);
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pkt->qp = qp;
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rxe_add_ref(qp);
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rxe_rcv_pkt(rxe, pkt, skb);
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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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err1:
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kfree_skb(skb);
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}
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static int rxe_match_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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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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pkt->offset = 0;
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if (unlikely(skb->len < pkt->offset + RXE_BTH_BYTES))
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goto drop;
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if (rxe_match_dgid(rxe, skb) < 0) {
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pr_warn_ratelimited("failed matching 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(rxe, 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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}
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