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IB/core: Resolve Ethernet L2 addresses when modifying QP 

Existing user space applications provide only IBoE L3 address
attributes to the kernel when they issue a modify QP modify.  To work
with them and let such apps (plus kernel consumers which don't use the
RDMA-CM) keep working transparently under the IBoE GID IP addressing
changes, add an Eth L2 address resolution helper.

Signed-off-by: Moni Shoua <monis@mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Or Gerlitz 2013-12-12 18:03:17 +02:00 committed by Roland Dreier
parent 37721d8501
commit ed4c54e5b4
3 changed files with 49 additions and 0 deletions
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2
drivers/infiniband/core/core_priv.h
View File

@ -49,4 +49,6 @@ void ib_sysfs_cleanup(void);
int ib_cache_setup(void);
void ib_cache_cleanup(void);
int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
struct ib_qp_attr *qp_attr, int *qp_attr_mask);
#endif /* _CORE_PRIV_H */

4
drivers/infiniband/core/uverbs_cmd.c
View File

@ -40,6 +40,7 @@
#include <asm/uaccess.h>
#include "uverbs.h"
#include "core_priv.h"
struct uverbs_lock_class {
struct lock_class_key key;
@ -1961,6 +1962,9 @@ ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
if (qp->real_qp == qp) {
ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
if (ret)
goto out;
ret = qp->device->modify_qp(qp, attr,
modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
} else {

43
drivers/infiniband/core/verbs.c
View File

@ -46,6 +46,8 @@
#include <rdma/ib_cache.h>
#include <rdma/ib_addr.h>
#include "core_priv.h"
int ib_rate_to_mult(enum ib_rate rate)
{
switch (rate) {
@ -859,10 +861,51 @@ int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
}
EXPORT_SYMBOL(ib_modify_qp_is_ok);
int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
struct ib_qp_attr *qp_attr, int *qp_attr_mask)
{
int ret = 0;
union ib_gid sgid;
if ((*qp_attr_mask & IB_QP_AV) &&
(rdma_port_get_link_layer(qp->device, qp_attr->ah_attr.port_num) == IB_LINK_LAYER_ETHERNET)) {
ret = ib_query_gid(qp->device, qp_attr->ah_attr.port_num,
qp_attr->ah_attr.grh.sgid_index, &sgid);
if (ret)
goto out;
if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) {
rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw, qp_attr->ah_attr.dmac);
rdma_get_ll_mac((struct in6_addr *)sgid.raw, qp_attr->smac);
qp_attr->vlan_id = rdma_get_vlan_id(&sgid);
} else {
ret = rdma_addr_find_dmac_by_grh(&sgid, &qp_attr->ah_attr.grh.dgid,
qp_attr->ah_attr.dmac, &qp_attr->vlan_id);
if (ret)
goto out;
ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr->smac, NULL);
if (ret)
goto out;
}
*qp_attr_mask |= IB_QP_SMAC;
if (qp_attr->vlan_id < 0xFFFF)
*qp_attr_mask |= IB_QP_VID;
}
out:
return ret;
}
EXPORT_SYMBOL(ib_resolve_eth_l2_attrs);
int ib_modify_qp(struct ib_qp *qp,
struct ib_qp_attr *qp_attr,
int qp_attr_mask)
{
int ret;
ret = ib_resolve_eth_l2_attrs(qp, qp_attr, &qp_attr_mask);
if (ret)
return ret;
return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
}
EXPORT_SYMBOL(ib_modify_qp);