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IB/core: Refactor ib_init_ah_attr_from_path() for RoCE

Resolving route for RoCE for a path record is needed only for the
received CM requests.
Therefore,
(a) ib_init_ah_attr_from_path() is refactored first to isolate the
code of resolving route.
(b) Setting dlid, path bits is not needed for RoCE.

Additionally ah attribute initialization is done from the path record
entry, so it is better to refer to path record entry type for
different link layer instead of ah attribute type while initializing
ah attribute itself.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit 2018-03-13 16:06:20 +02:00 committed by Jason Gunthorpe
parent a22af59ea9
commit 0a51415935
2 changed files with 108 additions and 96 deletions

View File

@ -1227,118 +1227,125 @@ static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
return src_path_mask;
}
static int
roce_resolve_route_from_path(struct ib_device *device, u8 port_num,
struct sa_path_rec *rec)
{
struct net_device *resolved_dev;
struct net_device *ndev;
struct net_device *idev;
struct rdma_dev_addr dev_addr = {
.bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
sa_path_get_ifindex(rec) : 0),
.net = sa_path_get_ndev(rec) ?
sa_path_get_ndev(rec) :
&init_net
};
union {
struct sockaddr _sockaddr;
struct sockaddr_in _sockaddr_in;
struct sockaddr_in6 _sockaddr_in6;
} sgid_addr, dgid_addr;
int ret;
if (!device->get_netdev)
return -EOPNOTSUPP;
rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
/* validate the route */
ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
&dgid_addr._sockaddr, &dev_addr);
if (ret)
return ret;
if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
dev_addr.network == RDMA_NETWORK_IPV6) &&
rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
return -EINVAL;
idev = device->get_netdev(device, port_num);
if (!idev)
return -ENODEV;
resolved_dev = dev_get_by_index(dev_addr.net,
dev_addr.bound_dev_if);
if (!resolved_dev) {
ret = -ENODEV;
goto done;
}
ndev = ib_get_ndev_from_path(rec);
rcu_read_lock();
if ((ndev && ndev != resolved_dev) ||
(resolved_dev != idev &&
!rdma_is_upper_dev_rcu(idev, resolved_dev)))
ret = -EHOSTUNREACH;
rcu_read_unlock();
dev_put(resolved_dev);
if (ndev)
dev_put(ndev);
done:
dev_put(idev);
return ret;
}
static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
struct sa_path_rec *rec,
struct rdma_ah_attr *ah_attr)
{
enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
struct net_device *ndev;
u16 gid_index;
int ret;
ndev = ib_get_ndev_from_path(rec);
ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
port_num, ndev, &gid_index);
if (ndev)
dev_put(ndev);
if (ret)
return ret;
rdma_ah_set_grh(ah_attr, &rec->dgid,
be32_to_cpu(rec->flow_label),
gid_index, rec->hop_limit,
rec->traffic_class);
return 0;
}
int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
struct sa_path_rec *rec,
struct rdma_ah_attr *ah_attr)
{
int ret;
u16 gid_index;
int use_roce;
struct net_device *ndev = NULL;
int ret = 0;
memset(ah_attr, 0, sizeof *ah_attr);
memset(ah_attr, 0, sizeof(*ah_attr));
ah_attr->type = rdma_ah_find_type(device, port_num);
rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
if ((ah_attr->type == RDMA_AH_ATTR_TYPE_OPA) &&
(rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)))
rdma_ah_set_make_grd(ah_attr, true);
rdma_ah_set_sl(ah_attr, rec->sl);
rdma_ah_set_path_bits(ah_attr, be32_to_cpu(sa_path_get_slid(rec)) &
get_src_path_mask(device, port_num));
rdma_ah_set_port_num(ah_attr, port_num);
rdma_ah_set_static_rate(ah_attr, rec->rate);
use_roce = rdma_cap_eth_ah(device, port_num);
if (use_roce) {
struct net_device *idev;
struct net_device *resolved_dev;
struct rdma_dev_addr dev_addr = {
.bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
sa_path_get_ifindex(rec) : 0),
.net = sa_path_get_ndev(rec) ?
sa_path_get_ndev(rec) :
&init_net
};
union {
struct sockaddr _sockaddr;
struct sockaddr_in _sockaddr_in;
struct sockaddr_in6 _sockaddr_in6;
} sgid_addr, dgid_addr;
if (!device->get_netdev)
return -EOPNOTSUPP;
rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
/* validate the route */
ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
&dgid_addr._sockaddr, &dev_addr);
if (sa_path_is_roce(rec)) {
ret = roce_resolve_route_from_path(device, port_num, rec);
if (ret)
return ret;
if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
dev_addr.network == RDMA_NETWORK_IPV6) &&
rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
return -EINVAL;
memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
} else {
rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
if (sa_path_is_opa(rec) &&
rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
rdma_ah_set_make_grd(ah_attr, true);
idev = device->get_netdev(device, port_num);
if (!idev)
return -ENODEV;
resolved_dev = dev_get_by_index(dev_addr.net,
dev_addr.bound_dev_if);
if (!resolved_dev) {
dev_put(idev);
return -ENODEV;
}
ndev = ib_get_ndev_from_path(rec);
rcu_read_lock();
if ((ndev && ndev != resolved_dev) ||
(resolved_dev != idev &&
!rdma_is_upper_dev_rcu(idev, resolved_dev)))
ret = -EHOSTUNREACH;
rcu_read_unlock();
dev_put(idev);
dev_put(resolved_dev);
if (ret) {
if (ndev)
dev_put(ndev);
return ret;
}
rdma_ah_set_path_bits(ah_attr,
be32_to_cpu(sa_path_get_slid(rec)) &
get_src_path_mask(device, port_num));
}
if (rec->hop_limit > 0 || use_roce) {
enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
port_num, ndev, &gid_index);
if (ret) {
if (ndev)
dev_put(ndev);
return ret;
}
rdma_ah_set_grh(ah_attr, &rec->dgid,
be32_to_cpu(rec->flow_label),
gid_index, rec->hop_limit,
rec->traffic_class);
if (ndev)
dev_put(ndev);
}
if (use_roce) {
u8 *dmac = sa_path_get_dmac(rec);
if (!dmac)
return -EINVAL;
memcpy(ah_attr->roce.dmac, dmac, ETH_ALEN);
}
return 0;
if (rec->hop_limit > 0 || sa_path_is_roce(rec))
ret = init_ah_attr_grh_fields(device, port_num, rec, ah_attr);
return ret;
}
EXPORT_SYMBOL(ib_init_ah_attr_from_path);

View File

@ -590,6 +590,11 @@ static inline bool sa_path_is_roce(struct sa_path_rec *rec)
(rec->rec_type == SA_PATH_REC_TYPE_ROCE_V2));
}
static inline bool sa_path_is_opa(struct sa_path_rec *rec)
{
return (rec->rec_type == SA_PATH_REC_TYPE_OPA);
}
static inline void sa_path_set_slid(struct sa_path_rec *rec, u32 slid)
{
if (rec->rec_type == SA_PATH_REC_TYPE_IB)