mirror of
https://github.com/openvswitch/ovs
synced 2025-10-13 14:07:02 +00:00
b7a31ec13d
is_frag is only used for communication between two functions, which means that it doesn't really need to be in the SKB CB. This wouldn't necessarily be a problem except that there are also a number of other paths that lead to this being uninitialized. This isn't a problem now but uninitialized memory seems dangerous and there isn't much upside. Signed-off-by: Jesse Gross <jesse@nicira.com> Reviewed-by: Ben Pfaff <blp@nicira.com>
89 lines
2.4 KiB
C
89 lines
2.4 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/if_ether.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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atomic_t refcnt;
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bool dead;
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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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struct arp_eth_header
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{
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__be16 ar_hrd; /* format of hardware address */
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__be16 ar_pro; /* format of protocol address */
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unsigned char ar_hln; /* length of hardware address */
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unsigned char ar_pln; /* length of protocol address */
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__be16 ar_op; /* ARP opcode (command) */
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/* Ethernet+IPv4 specific members. */
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unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
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unsigned char ar_sip[4]; /* sender IP address */
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unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
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unsigned char ar_tip[4]; /* target IP address */
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} __attribute__((packed));
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int flow_init(void);
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void flow_exit(void);
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struct sw_flow *flow_alloc(void);
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void flow_deferred_free(struct sw_flow *);
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void flow_free_tbl(struct tbl_node *);
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struct sw_flow_actions *flow_actions_alloc(size_t n_actions);
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void flow_deferred_free_acts(struct sw_flow_actions *);
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void flow_hold(struct sw_flow *);
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void flow_put(struct sw_flow *);
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int flow_extract(struct sk_buff *, u16 in_port, struct odp_flow_key *, bool *is_frag);
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void flow_used(struct sw_flow *, struct sk_buff *);
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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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static inline struct sw_flow *flow_cast(const struct tbl_node *node)
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{
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return container_of(node, struct sw_flow, tbl_node);
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}
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#endif /* flow.h */
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