e80857cce8
Both mega flow mask's reference counter and per flow table mask list should only be accessed when holding ovs_mutex() lock. However this is not true with ovs_flow_table_flush(). The patch fixes this bug. Reported-by: Joe Stringer <joestringer@nicira.com> Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/*
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* Copyright (c) 2007-2013 Nicira, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#ifndef FLOW_TABLE_H
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#define FLOW_TABLE_H 1
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#include <linux/kernel.h>
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#include <linux/netlink.h>
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#include <linux/openvswitch.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/if_ether.h>
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#include <linux/in6.h>
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#include <linux/jiffies.h>
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#include <linux/time.h>
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#include <linux/flex_array.h>
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#include <net/inet_ecn.h>
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#include <net/ip_tunnels.h>
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#include "flow.h"
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struct table_instance {
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struct flex_array *buckets;
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unsigned int n_buckets;
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struct rcu_head rcu;
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int node_ver;
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u32 hash_seed;
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bool keep_flows;
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};
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struct flow_table {
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struct table_instance __rcu *ti;
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struct list_head mask_list;
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unsigned long last_rehash;
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unsigned int count;
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};
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int ovs_flow_init(void);
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void ovs_flow_exit(void);
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struct sw_flow *ovs_flow_alloc(bool percpu_stats);
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void ovs_flow_free(struct sw_flow *, bool deferred);
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int ovs_flow_tbl_init(struct flow_table *);
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int ovs_flow_tbl_count(struct flow_table *table);
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void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred);
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int ovs_flow_tbl_flush(struct flow_table *flow_table);
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int ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow,
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struct sw_flow_mask *mask);
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void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
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int ovs_flow_tbl_num_masks(const struct flow_table *table);
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struct sw_flow *ovs_flow_tbl_dump_next(struct table_instance *table,
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u32 *bucket, u32 *idx);
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struct sw_flow *ovs_flow_tbl_lookup_stats(struct flow_table *,
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const struct sw_flow_key *,
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u32 *n_mask_hit);
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struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
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const struct sw_flow_key *);
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bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
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struct sw_flow_match *match);
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void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
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const struct sw_flow_mask *mask);
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#endif /* flow_table.h */
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