diff options
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_recv.c')
-rw-r--r-- | drivers/infiniband/sw/rxe/rxe_recv.c | 39 |
1 files changed, 29 insertions, 10 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_recv.c b/drivers/infiniband/sw/rxe/rxe_recv.c index 46e111c218fd..369ba76f1605 100644 --- a/drivers/infiniband/sw/rxe/rxe_recv.c +++ b/drivers/infiniband/sw/rxe/rxe_recv.c @@ -36,21 +36,26 @@ #include "rxe.h" #include "rxe_loc.h" +/* check that QP matches packet opcode type and is in a valid state */ static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, struct rxe_qp *qp) { + unsigned int pkt_type; + if (unlikely(!qp->valid)) goto err1; + pkt_type = pkt->opcode & 0xe0; + switch (qp_type(qp)) { case IB_QPT_RC: - if (unlikely((pkt->opcode & IB_OPCODE_RC) != 0)) { + if (unlikely(pkt_type != IB_OPCODE_RC)) { pr_warn_ratelimited("bad qp type\n"); goto err1; } break; case IB_QPT_UC: - if (unlikely(!(pkt->opcode & IB_OPCODE_UC))) { + if (unlikely(pkt_type != IB_OPCODE_UC)) { pr_warn_ratelimited("bad qp type\n"); goto err1; } @@ -58,7 +63,7 @@ static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, case IB_QPT_UD: case IB_QPT_SMI: case IB_QPT_GSI: - if (unlikely(!(pkt->opcode & IB_OPCODE_UD))) { + if (unlikely(pkt_type != IB_OPCODE_UD)) { pr_warn_ratelimited("bad qp type\n"); goto err1; } @@ -281,6 +286,8 @@ static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb) struct rxe_mc_elem *mce; struct rxe_qp *qp; union ib_gid dgid; + struct sk_buff *per_qp_skb; + struct rxe_pkt_info *per_qp_pkt; int err; if (skb->protocol == htons(ETH_P_IP)) @@ -298,7 +305,6 @@ static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb) list_for_each_entry(mce, &mcg->qp_list, qp_list) { qp = mce->qp; - pkt = SKB_TO_PKT(skb); /* validate qp for incoming packet */ err = check_type_state(rxe, pkt, qp); @@ -309,15 +315,27 @@ static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb) if (err) continue; - /* if *not* the last qp in the list - * increase the users of the skb then post to the next qp + /* for all but the last qp create a new clone of the + * skb and pass to the qp. If an error occurs in the + * checks for the last qp in the list we need to + * free the skb since it hasn't been passed on to + * rxe_rcv_pkt() which would free it later. */ - if (mce->qp_list.next != &mcg->qp_list) - skb_get(skb); + if (mce->qp_list.next != &mcg->qp_list) { + per_qp_skb = skb_clone(skb, GFP_ATOMIC); + } else { + per_qp_skb = skb; + /* show we have consumed the skb */ + skb = NULL; + } - pkt->qp = qp; + if (unlikely(!per_qp_skb)) + continue; + + per_qp_pkt = SKB_TO_PKT(per_qp_skb); + per_qp_pkt->qp = qp; rxe_add_ref(qp); - rxe_rcv_pkt(pkt, skb); + rxe_rcv_pkt(per_qp_pkt, per_qp_skb); } spin_unlock_bh(&mcg->mcg_lock); @@ -325,6 +343,7 @@ static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb) rxe_drop_ref(mcg); /* drop ref from rxe_pool_get_key. */ err1: + /* free skb if not consumed */ kfree_skb(skb); } |