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IB/core: Add netdev to path record 

In order to find the sgid_index, one could just query the IB cache
with the correct GID and netdevice. Therefore, instead of storing
the L2 attributes directly in the path, we only store the
ifindex and net and use them later to get the sgid_index.
The vlan_id and smac L2 attributes are removed in a later patch.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-By: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Matan Barak 2015-10-15 18:38:47 +03:00 committed by Doug Ledford
parent d300ec528b
commit ba36e37fd3
3 changed files with 23 additions and 2 deletions
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13
drivers/infiniband/core/sa_query.c
View File

@ -1007,18 +1007,25 @@ int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
force_grh = rdma_cap_eth_ah(device, port_num);
if (rec->hop_limit > 1 || force_grh) {
struct net_device *ndev = ib_get_ndev_from_path(rec);
ah_attr->ah_flags = IB_AH_GRH;
ah_attr->grh.dgid = rec->dgid;
ret = ib_find_cached_gid(device, &rec->sgid, NULL, &port_num,
ret = ib_find_cached_gid(device, &rec->sgid, ndev, &port_num,
&gid_index);
if (ret)
if (ret) {
if (ndev)
dev_put(ndev);
return ret;
}
ah_attr->grh.sgid_index = gid_index;
ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
ah_attr->grh.hop_limit = rec->hop_limit;
ah_attr->grh.traffic_class = rec->traffic_class;
if (ndev)
dev_put(ndev);
}
if (force_grh) {
memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN);
@ -1151,6 +1158,8 @@ static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
mad->data, &rec);
rec.vlan_id = 0xffff;
rec.net = NULL;
rec.ifindex = 0;
memset(rec.dmac, 0, ETH_ALEN);
memset(rec.smac, 0, ETH_ALEN);
query->callback(status, &rec, query->context);

2
drivers/infiniband/core/uverbs_marshall.c
View File

@ -144,5 +144,7 @@ void ib_copy_path_rec_from_user(struct ib_sa_path_rec *dst,
memset(dst->smac, 0, sizeof(dst->smac));
memset(dst->dmac, 0, sizeof(dst->dmac));
dst->vlan_id = 0xffff;
dst->net = NULL;
dst->ifindex = 0;
}
EXPORT_SYMBOL(ib_copy_path_rec_from_user);

10
include/rdma/ib_sa.h
View File

@ -39,6 +39,7 @@
#include <linux/compiler.h>
#include <linux/atomic.h>
#include <linux/netdevice.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_mad.h>
@ -157,8 +158,17 @@ struct ib_sa_path_rec {
u8 smac[ETH_ALEN];
u8 dmac[ETH_ALEN];
u16 vlan_id;
/* ignored in IB */
int ifindex;
/* ignored in IB */
struct net *net;
};
static inline struct net_device *ib_get_ndev_from_path(struct ib_sa_path_rec *rec)
{
return rec->net ? dev_get_by_index(rec->net, rec->ifindex) : NULL;
}
#define IB_SA_MCMEMBER_REC_MGID IB_SA_COMP_MASK( 0)
#define IB_SA_MCMEMBER_REC_PORT_GID IB_SA_COMP_MASK( 1)
#define IB_SA_MCMEMBER_REC_QKEY IB_SA_COMP_MASK( 2)