Add a check to make sure the total length of the flow key sent to the
firmware stays within the supported limit.
Signed-off-by: Louis Peens <louis.peens@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
#define NFP_FLOWER_MASK_ELEMENT_RS 1
#define NFP_FLOWER_MASK_HASH_BITS 10
+#define NFP_FLOWER_KEY_MAX_LW 32
+
#define NFP_FL_META_FLAG_MANAGE_MASK BIT(7)
#define NFP_FL_MASK_REUSE_TIME_NS 40000
{
struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
u32 port_id;
+ int ext_len;
int err;
u8 *ext;
u8 *msk;
}
}
+ /* Check that the flow key does not exceed the maximum limit.
+ * All structures in the key is multiples of 4 bytes, so use u32.
+ */
+ ext_len = (u32 *)ext - (u32 *)nfp_flow->unmasked_data;
+ if (ext_len > NFP_FLOWER_KEY_MAX_LW) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "unsupported offload: flow key too long");
+ return -EOPNOTSUPP;
+ }
+
return 0;
}