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https://github.com/openvswitch/ovs
synced 2025-10-15 14:17:18 +00:00
abfec86556
Originally, the datapath didn't care about IP TOS at all. Then, to support NetFlow, we made it keep track of the last-seen IP TOS value on a per-flow basis. Then, to support OpenFlow 1.0, we added a nw_tos field to odp_flow_key. We don't need both methods, so this commit drops the NetFlow-specific tracking. This introduces a small kernel ABI break: upgrading the kernel module without upgrading the OVS userspace will mean that NetFlow records will all show an IP TOS value of 0. I don't consider that to be a serious problem.
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/*
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* Copyright (c) 2009, 2010 Nicira Networks.
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* Distributed under the terms of the GNU GPL version 2.
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*
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* Significant portions of this file may be copied from parts of the Linux
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* kernel, by Linus Torvalds and others.
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*/
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#ifndef FLOW_H
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#define FLOW_H 1
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/rcupdate.h>
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#include <linux/gfp.h>
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#include <linux/jiffies.h>
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#include <linux/time.h>
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#include "openvswitch/datapath-protocol.h"
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#include "table.h"
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struct sk_buff;
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struct sw_flow_actions {
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struct rcu_head rcu;
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unsigned int n_actions;
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union odp_action actions[];
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};
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struct sw_flow {
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struct rcu_head rcu;
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struct tbl_node tbl_node;
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struct odp_flow_key key;
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struct sw_flow_actions *sf_acts;
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spinlock_t lock; /* Lock for values below. */
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unsigned long used; /* Last used time (in jiffies). */
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u64 packet_count; /* Number of packets matched. */
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u64 byte_count; /* Number of bytes matched. */
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u8 tcp_flags; /* Union of seen TCP flags. */
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};
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extern struct kmem_cache *flow_cache;
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struct sw_flow_actions *flow_actions_alloc(size_t n_actions);
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void flow_deferred_free(struct sw_flow *);
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void flow_deferred_free_acts(struct sw_flow_actions *);
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int flow_extract(struct sk_buff *, u16 in_port, struct odp_flow_key *);
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void flow_used(struct sw_flow *, struct sk_buff *);
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struct sw_flow *flow_cast(const struct tbl_node *);
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u32 flow_hash(const struct odp_flow_key *key);
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int flow_cmp(const struct tbl_node *, void *target);
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void flow_free_tbl(struct tbl_node *);
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int flow_init(void);
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void flow_exit(void);
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#endif /* flow.h */
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