FLOW_U64S
};
+/* Asserts that field 'f1' follows immediately after 'f0' in struct flow,
+ * without any intervening padding. */
+#define ASSERT_SEQUENTIAL(f0, f1) \
+ BUILD_ASSERT_DECL(offsetof(struct flow, f0) \
+ + MEMBER_SIZEOF(struct flow, f0) \
+ == offsetof(struct flow, f1))
+
+/* Asserts that fields 'f0' and 'f1' are in the same 32-bit aligned word within
+ * struct flow. */
+#define ASSERT_SAME_WORD(f0, f1) \
+ BUILD_ASSERT_DECL(offsetof(struct flow, f0) / 4 \
+ == offsetof(struct flow, f1) / 4)
+
+/* Asserts that 'f0' and 'f1' are both sequential and within the same 32-bit
+ * aligned word in struct flow. */
+#define ASSERT_SEQUENTIAL_SAME_WORD(f0, f1) \
+ ASSERT_SEQUENTIAL(f0, f1); \
+ ASSERT_SAME_WORD(f0, f1)
+
/* miniflow_extract() assumes the following to be true to optimize the
* extraction process. */
-BUILD_ASSERT_DECL(offsetof(struct flow, dl_type) + 2
- == offsetof(struct flow, vlan_tci) &&
- offsetof(struct flow, dl_type) / 4
- == offsetof(struct flow, vlan_tci) / 4 );
-
-BUILD_ASSERT_DECL(offsetof(struct flow, nw_frag) + 3
- == offsetof(struct flow, nw_proto) &&
- offsetof(struct flow, nw_tos) + 2
- == offsetof(struct flow, nw_proto) &&
- offsetof(struct flow, nw_ttl) + 1
- == offsetof(struct flow, nw_proto) &&
- offsetof(struct flow, nw_frag) / 4
- == offsetof(struct flow, nw_tos) / 4 &&
- offsetof(struct flow, nw_ttl) / 4
- == offsetof(struct flow, nw_tos) / 4 &&
- offsetof(struct flow, nw_proto) / 4
- == offsetof(struct flow, nw_tos) / 4);
+ASSERT_SEQUENTIAL_SAME_WORD(dl_type, vlan_tci);
+
+ASSERT_SEQUENTIAL_SAME_WORD(nw_frag, nw_tos);
+ASSERT_SEQUENTIAL_SAME_WORD(nw_tos, nw_ttl);
+ASSERT_SEQUENTIAL_SAME_WORD(nw_ttl, nw_proto);
/* TCP flags in the middle of a BE64, zeroes in the other half. */
BUILD_ASSERT_DECL(offsetof(struct flow, tcp_flags) % 8 == 4);
#define TCP_FLAGS_BE32(tcp_ctl) ((OVS_FORCE ovs_be32)TCP_FLAGS_BE16(tcp_ctl))
#endif
-BUILD_ASSERT_DECL(offsetof(struct flow, tp_src) + 2
- == offsetof(struct flow, tp_dst) &&
- offsetof(struct flow, tp_src) / 4
- == offsetof(struct flow, tp_dst) / 4);
+ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst);
/* Removes 'size' bytes from the head end of '*datap', of size '*sizep', which
* must contain at least 'size' bytes of data. Returns the first byte of data
ovs_be16 vlan_tci;
/* Link layer. */
- BUILD_ASSERT(offsetof(struct flow, dl_dst) + 6
- == offsetof(struct flow, dl_src));
+ ASSERT_SEQUENTIAL(dl_dst, dl_src);
miniflow_push_macs(mf, dl_dst, data);
/* dl_type, vlan_tci. */
vlan_tci = parse_vlan(&data, &size);
}
/* Must be adjacent. */
- BUILD_ASSERT(offsetof(struct flow, arp_sha) + 6
- == offsetof(struct flow, arp_tha));
+ ASSERT_SEQUENTIAL(arp_sha, arp_tha);
memcpy(arp_buf[0], arp->ar_sha, ETH_ADDR_LEN);
memcpy(arp_buf[1], arp->ar_tha, ETH_ADDR_LEN);
return hash;
}
-BUILD_ASSERT_DECL(offsetof(struct flow, tp_src) + 2
- == offsetof(struct flow, tp_dst) &&
- offsetof(struct flow, tp_src) / 4
- == offsetof(struct flow, tp_dst) / 4);
-BUILD_ASSERT_DECL(offsetof(struct flow, ipv6_src) + 16
- == offsetof(struct flow, ipv6_dst));
+ASSERT_SEQUENTIAL_SAME_WORD(tp_src, tp_dst);
+ASSERT_SEQUENTIAL(ipv6_src, ipv6_dst);
/* Calculates the 5-tuple hash from the given flow. */
uint32_t