2bc06869cd
By default, a tap netdevice is of no use when not fed by a separate process. The ability to automatically feed it from another netdevice allows applications to capture any kind of traffic normally destined to the kernel stack. This patch implements this ability through a new optional "remote" parameter. Packets matching filtering rules created with the flow API are matched on the remote device and redirected to the tap PMD, where the relevant action will be performed. Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com> Acked-by: Olga Shern <olgas@mellanox.com> Acked-by: Keith Wiles <keith.wiles@intel.com>
83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright 2017 6WIND S.A.
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* Copyright 2017 Mellanox.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of 6WIND S.A. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TAP_FLOW_H_
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#define _TAP_FLOW_H_
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#include <rte_flow.h>
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#include <rte_flow_driver.h>
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#include <rte_eth_tap.h>
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/**
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* In TC, priority 0 means we require the kernel to allocate one for us.
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* In rte_flow, however, we want the priority 0 to be the most important one.
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* Use an offset to have the most important priority being 1 in TC.
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*/
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#define PRIORITY_OFFSET 1
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#define PRIORITY_MASK (0xfff)
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#define MAX_PRIORITY (PRIORITY_MASK - PRIORITY_OFFSET)
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#define GROUP_MASK (0xf)
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#define GROUP_SHIFT 12
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#define MAX_GROUP GROUP_MASK
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/**
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* These index are actually in reversed order: their priority is processed
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* by subtracting their value to the lowest priority (PRIORITY_MASK).
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* Thus the first one will have the lowest priority in the end
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* (but biggest value).
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*/
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enum implicit_rule_index {
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TAP_REMOTE_TX,
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TAP_REMOTE_BROADCASTV6,
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TAP_REMOTE_BROADCAST,
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TAP_REMOTE_ALLMULTI,
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TAP_REMOTE_PROMISC,
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TAP_REMOTE_LOCAL_MAC,
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TAP_REMOTE_MAX_IDX,
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};
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int tap_dev_filter_ctrl(struct rte_eth_dev *dev,
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enum rte_filter_type filter_type,
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enum rte_filter_op filter_op,
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void *arg);
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int tap_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error);
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int tap_flow_implicit_create(struct pmd_internals *pmd,
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enum implicit_rule_index idx);
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int tap_flow_implicit_destroy(struct pmd_internals *pmd,
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enum implicit_rule_index idx);
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int tap_flow_implicit_flush(struct pmd_internals *pmd,
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struct rte_flow_error *error);
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#endif /* _TAP_FLOW_H_ */
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