From: Daniel Jurgens <danielj@xxxxxxxxxxxx>
Cache the subnet prefix and add a function to access it. Enforcing
security requires frequent queries of the subnet prefix and the pkeys in
the pkey table.
Signed-off-by: Daniel Jurgens <danielj@xxxxxxxxxxxx>
Reviewed-by: Eli Cohen <eli@xxxxxxxxxxxx>
Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
v2:
- In ib_get_cached_subnet_prefix wait to initialize p until after
validation. Yuval Shaia
drivers/infiniband/core/cache.c | 22 ++++++++++++++++++++++
drivers/infiniband/core/core_priv.h | 3 +++
include/rdma/ib_verbs.h | 1 +
3 files changed, 26 insertions(+)
diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index b1371eb..b9c0066 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -911,6 +911,26 @@ int ib_get_cached_pkey(struct ib_device *device,
}
EXPORT_SYMBOL(ib_get_cached_pkey);
+int ib_get_cached_subnet_prefix(struct ib_device *device,
+ u8 port_num,
+ u64 *sn_pfx)
+{
+ unsigned long flags;
+ int p;
+
+ if (port_num < rdma_start_port(device) ||
+ port_num > rdma_end_port(device))
+ return -EINVAL;
+
+ p = port_num - rdma_start_port(device);
+ read_lock_irqsave(&device->cache.lock, flags);
+ *sn_pfx = device->cache.ports[p].subnet_prefix;
+ read_unlock_irqrestore(&device->cache.lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(ib_get_cached_subnet_prefix);
+
int ib_find_cached_pkey(struct ib_device *device,
u8 port_num,
u16 pkey,
@@ -1108,6 +1128,8 @@ static void ib_cache_update(struct ib_device *device,
device->cache.ports[port - rdma_start_port(device)].port_state =
tprops->state;
+ device->cache.ports[port - rdma_start_port(device)].subnet_prefix =
+ tprops->subnet_prefix;
write_unlock_irq(&device->cache.lock);
kfree(gid_cache);
diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h
index cb7d372..249e3ed 100644
--- a/drivers/infiniband/core/core_priv.h
+++ b/drivers/infiniband/core/core_priv.h
@@ -176,4 +176,7 @@ int ib_nl_handle_set_timeout(struct sk_buff *skb,
int ib_nl_handle_ip_res_resp(struct sk_buff *skb,
struct netlink_callback *cb);
+int ib_get_cached_subnet_prefix(struct ib_device *device,
+ u8 port_num,
+ u64 *sn_pfx);
#endif /* _CORE_PRIV_H */
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 99e4423..23486d3 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1841,6 +1841,7 @@ enum ib_mad_result {
#define IB_DEVICE_NAME_MAX 64
struct ib_port_cache {
+ u64 subnet_prefix;
struct ib_pkey_cache *pkey;
struct ib_gid_table *gid;
u8 lmc;
--
2.7.4
