#include <linux/skbuff.h>
#include <linux/if_ether.h>
-#include "openflow.h"
+#include "openflow/openflow.h"
struct sk_buff;
struct ofp_flow_mod;
/* Identification data for a flow.
- Network byte order except for the "wildcards" field.
- In decreasing order by size, so that sw_flow_key structures can
- be hashed or compared bytewise.
- It might be useful to reorder members from (expected) greatest to least
- inter-flow variability, so that failing bytewise comparisons with memcmp
- terminate as quickly as possible on average. */
+ * Network byte order except for the "wildcards" field.
+ * Ordered to make bytewise comparisons (e.g. with memcmp()) fail quickly and
+ * to keep the amount of padding to a minimum.
+ * If you change the ordering of fields here, change flow_keys_equal() to
+ * compare the proper fields.
+ */
struct sw_flow_key {
- uint32_t nw_src; /* IP source address. */
- uint32_t nw_dst; /* IP destination address. */
- uint16_t in_port; /* Input switch port */
- uint16_t dl_vlan; /* Input VLAN. */
- uint16_t dl_type; /* Ethernet frame type. */
- uint16_t tp_src; /* TCP/UDP source port. */
- uint16_t tp_dst; /* TCP/UDP destination port. */
- uint16_t wildcards; /* Wildcard fields (host byte order). */
- uint8_t dl_src[ETH_ALEN]; /* Ethernet source address. */
- uint8_t dl_dst[ETH_ALEN]; /* Ethernet destination address. */
- uint8_t nw_proto; /* IP protocol. */
- uint8_t pad[3]; /* NB: Pad to make 32-bit aligned */
+ uint32_t nw_src; /* IP source address. */
+ uint32_t nw_dst; /* IP destination address. */
+ uint16_t in_port; /* Input switch port */
+ uint16_t dl_vlan; /* Input VLAN. */
+ uint16_t dl_type; /* Ethernet frame type. */
+ uint16_t tp_src; /* TCP/UDP source port. */
+ uint16_t tp_dst; /* TCP/UDP destination port. */
+ uint8_t dl_src[ETH_ALEN]; /* Ethernet source address. */
+ uint8_t dl_dst[ETH_ALEN]; /* Ethernet destination address. */
+ uint8_t nw_proto; /* IP protocol. */
+ uint8_t pad; /* Pad to 32-bit alignment. */
+ uint32_t wildcards; /* Wildcard fields (host byte order). */
+ uint32_t nw_src_mask; /* 1-bit in each significant nw_src bit. */
+ uint32_t nw_dst_mask; /* 1-bit in each significant nw_dst bit. */
};
+/* The match fields for ICMP type and code use the transport source and
+ * destination port fields, respectively. */
+#define icmp_type tp_src
+#define icmp_code tp_dst
+
+/* Compare two sw_flow_keys and return true if they are the same flow, false
+ * otherwise. Wildcards and netmasks are not considered. */
+static inline int flow_keys_equal(const struct sw_flow_key *a,
+ const struct sw_flow_key *b)
+{
+ return !memcmp(a, b, offsetof(struct sw_flow_key, wildcards));
+}
+
/* We need to manually make sure that the structure is 32-bit aligned,
* since we don't want garbage values in compiler-generated pads from
* messing up hash matches.
*/
static inline void check_key_align(void)
{
- BUILD_BUG_ON(sizeof(struct sw_flow_key) != 36);
+ BUILD_BUG_ON(sizeof(struct sw_flow_key) != 44);
}
+/* We keep actions as a separate structure because we need to be able to
+ * swap them out atomically when the modify command comes from a Flow
+ * Modify message. */
+struct sw_flow_actions {
+ size_t actions_len;
+ struct rcu_head rcu;
+
+ struct ofp_action_header actions[0];
+};
+
/* Locking:
*
* - Readers must take rcu_read_lock and hold it the entire time that the flow
uint16_t priority; /* Only used on entries with wildcards. */
uint16_t idle_timeout; /* Idle time before discarding (seconds). */
uint16_t hard_timeout; /* Hard expiration time (seconds) */
- unsigned long used; /* Last used time (in jiffies). */
+ unsigned long used; /* Last used time (in jiffies). */
- /* FIXME? Probably most flows have only a single action. */
- unsigned int n_actions;
- struct ofp_action *actions;
+ struct sw_flow_actions *sf_acts;
/* For use by table implementation. */
struct list_head node;
struct rcu_head rcu;
};
-int flow_matches(const struct sw_flow_key *, const struct sw_flow_key *);
-int flow_del_matches(const struct sw_flow_key *, const struct sw_flow_key *,
+int flow_matches_1wild(const struct sw_flow_key *, const struct sw_flow_key *);
+int flow_matches_2wild(const struct sw_flow_key *, const struct sw_flow_key *);
+int flow_matches_desc(const struct sw_flow_key *, const struct sw_flow_key *,
int);
-struct sw_flow *flow_alloc(int n_actions, gfp_t flags);
+int flow_has_out_port(struct sw_flow *, uint16_t);
+struct sw_flow *flow_alloc(size_t actions_len, gfp_t flags);
void flow_free(struct sw_flow *);
void flow_deferred_free(struct sw_flow *);
+void flow_deferred_free_acts(struct sw_flow_actions *);
+void flow_replace_acts(struct sw_flow *, const struct ofp_action_header *,
+ size_t);
int flow_extract(struct sk_buff *, uint16_t in_port, struct sw_flow_key *);
void flow_extract_match(struct sw_flow_key* to, const struct ofp_match* from);
void flow_fill_match(struct ofp_match* to, const struct sw_flow_key* from);
git://git.onelab.eu / sliver-openvswitch.git / blobdiff