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IB/mlx4: Handle IPv4 header when demultiplexing MAD

소스 검색 
When MAD arrives to the hypervisor, we need to identify which slave it
should be sent by destination GID. When L3 protocol is IPv4 the
GRH is replaced by an IPv4 header. This patch detects when IPv4 header
needs to be parsed instead of GRH.

Fixes: b6ffaeffae ('mlx4: In RoCE allow guests to have multiple GIDS')
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Moni Shoua
2016-11-10 11:30:56 +02:00
committed by Doug Ledford
부모 af4295c117
커밋 850d8fd765
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33
drivers/infiniband/hw/mlx4/mad.c
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@@ -39,6 +39,8 @@
#include <linux/mlx4/cmd.h>
#include <linux/gfp.h>
#include <rdma/ib_pma.h>
#include <linux/ip.h>
#include <net/ipv6.h>
#include <linux/mlx4/driver.h>
#include "mlx4_ib.h"
@@ -480,6 +482,23 @@ static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave,
return -EINVAL;
}
static int get_gids_from_l3_hdr(struct ib_grh *grh, union ib_gid *sgid,
union ib_gid *dgid)
{
int version = ib_get_rdma_header_version((const union rdma_network_hdr *)grh);
enum rdma_network_type net_type;
if (version == 4)
net_type = RDMA_NETWORK_IPV4;
else if (version == 6)
net_type = RDMA_NETWORK_IPV6;
else
return -EINVAL;
return ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
sgid, dgid);
}
int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
enum ib_qp_type dest_qpt, struct ib_wc *wc,
struct ib_grh *grh, struct ib_mad *mad)
@@ -538,7 +557,10 @@ int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
memset(&attr, 0, sizeof attr);
attr.port_num = port;
if (is_eth) {
memcpy(&attr.grh.dgid.raw[0], &grh->dgid.raw[0], 16);
union ib_gid sgid;
if (get_gids_from_l3_hdr(grh, &sgid, &attr.grh.dgid))
return -EINVAL;
attr.ah_flags = IB_AH_GRH;
}
ah = ib_create_ah(tun_ctx->pd, &attr);
@@ -651,6 +673,11 @@ static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port,
is_eth = 1;
if (is_eth) {
union ib_gid dgid;
union ib_gid sgid;
if (get_gids_from_l3_hdr(grh, &sgid, &dgid))
return -EINVAL;
if (!(wc->wc_flags & IB_WC_GRH)) {
mlx4_ib_warn(ibdev, "RoCE grh not present.\n");
return -EINVAL;
@@ -659,10 +686,10 @@ static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port,
mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n");
return -EINVAL;
}
err = mlx4_get_slave_from_roce_gid(dev->dev, port, grh->dgid.raw, &slave);
err = mlx4_get_slave_from_roce_gid(dev->dev, port, dgid.raw, &slave);
if (err && mlx4_is_mf_bonded(dev->dev)) {
other_port = (port == 1) ? 2 : 1;
err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, grh->dgid.raw, &slave);
err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, dgid.raw, &slave);
if (!err) {
port = other_port;
pr_debug("resolved slave %d from gid %pI6 wire port %d other %d\n",