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Commit 883c71fe authored by Daniel Jurgens's avatar Daniel Jurgens Committed by Paul Moore
Browse files

IB/core: IB cache enhancements to support Infiniband security 



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: default avatarDaniel Jurgens <danielj@mellanox.com>
Reviewed-by: default avatarEli Cohen <eli@mellanox.com>
Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Reviewed-by: default avatarJames Morris <james.l.morris@oracle.com>
Acked-by: default avatarDoug Ledford <dledford@redhat.com>
Signed-off-by: default avatarPaul Moore <paul@paul-moore.com>
parent 270e8573

drivers/infiniband/core/cache.c

+22 −0
Original line number Diff line number Diff line
@@ -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);

drivers/infiniband/core/core_priv.h

+3 −0
Original line number Diff line number Diff line
@@ -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 */

include/rdma/ib_verbs.h

+1 −0
Original line number Diff line number Diff line
@@ -1891,6 +1891,7 @@ enum ib_mad_result { 
};



struct ib_port_cache {

	u64		      subnet_prefix;

	struct ib_pkey_cache  *pkey;

	struct ib_gid_table   *gid;

	u8                     lmc;