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ethdev: introduce generic flow API

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This new API supersedes all the legacy filter types described in
rte_eth_ctrl.h. It is slightly higher level and as a result relies more on
PMDs to process and validate flow rules.

Benefits:

- A unified API is easier to program for, applications do not have to be
  written for a specific filter type which may or may not be supported by
  the underlying device.

- The behavior of a flow rule is the same regardless of the underlying
  device, applications do not need to be aware of hardware quirks.

- Extensible by design, API/ABI breakage should rarely occur if at all.

- Documentation is self-standing, no need to look up elsewhere.

Existing filter types will be deprecated and removed in the near future.

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Olga Shern <olgas@mellanox.com>
This commit is contained in:
Adrien Mazarguil 2016-12-21 15:51:17 +01:00 committed by Thomas Monjalon
parent 15925897e7
commit b1a4b4cbc0
8 changed files with 1303 additions and 0 deletions
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4
MAINTAINERS
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@ -243,6 +243,10 @@ M: Thomas Monjalon <thomas.monjalon@6wind.com>
F: lib/librte_ether/
F: scripts/test-null.sh
Flow API
M: Adrien Mazarguil <adrien.mazarguil@6wind.com>
F: lib/librte_ether/rte_flow*
Crypto API
M: Declan Doherty <declan.doherty@intel.com>
F: lib/librte_cryptodev/

2
doc/api/doxy-api-index.md
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@ -39,6 +39,8 @@ There are many libraries, so their headers may be grouped by topics:
[dev] (@ref rte_dev.h),
[ethdev] (@ref rte_ethdev.h),
[ethctrl] (@ref rte_eth_ctrl.h),
[rte_flow] (@ref rte_flow.h),
[rte_flow_driver] (@ref rte_flow_driver.h),
[cryptodev] (@ref rte_cryptodev.h),
[devargs] (@ref rte_devargs.h),
[bond] (@ref rte_eth_bond.h),

3
lib/librte_ether/Makefile
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@ -44,6 +44,7 @@ EXPORT_MAP := rte_ether_version.map
LIBABIVER := 5
SRCS-y += rte_ethdev.c
SRCS-y += rte_flow.c
#
# Export include files
@ -51,6 +52,8 @@ SRCS-y += rte_ethdev.c
SYMLINK-y-include += rte_ethdev.h
SYMLINK-y-include += rte_eth_ctrl.h
SYMLINK-y-include += rte_dev_info.h
SYMLINK-y-include += rte_flow.h
SYMLINK-y-include += rte_flow_driver.h
# this lib depends upon:
DEPDIRS-y += lib/librte_net lib/librte_eal lib/librte_mempool lib/librte_ring lib/librte_mbuf

1
lib/librte_ether/rte_eth_ctrl.h
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@ -99,6 +99,7 @@ enum rte_filter_type {
RTE_ETH_FILTER_FDIR,
RTE_ETH_FILTER_HASH,
RTE_ETH_FILTER_L2_TUNNEL,
RTE_ETH_FILTER_GENERIC,
RTE_ETH_FILTER_MAX
};

5
lib/librte_ether/rte_ether_version.map
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@ -151,5 +151,10 @@ DPDK_17.02 {
global:
_rte_eth_dev_reset;
rte_flow_create;
rte_flow_destroy;
rte_flow_flush;
rte_flow_query;
rte_flow_validate;
} DPDK_16.11;

159
lib/librte_ether/rte_flow.c Normal file
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@ -0,0 +1,159 @@
/*-
* BSD LICENSE
*
* Copyright 2016 6WIND S.A.
* Copyright 2016 Mellanox.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of 6WIND S.A. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdint.h>
#include <rte_errno.h>
#include <rte_branch_prediction.h>
#include "rte_ethdev.h"
#include "rte_flow_driver.h"
#include "rte_flow.h"
/* Get generic flow operations structure from a port. */
const struct rte_flow_ops *
rte_flow_ops_get(uint8_t port_id, struct rte_flow_error *error)
{
struct rte_eth_dev *dev = &rte_eth_devices[port_id];
const struct rte_flow_ops *ops;
int code;
if (unlikely(!rte_eth_dev_is_valid_port(port_id)))
code = ENODEV;
else if (unlikely(!dev->dev_ops->filter_ctrl ||
dev->dev_ops->filter_ctrl(dev,
RTE_ETH_FILTER_GENERIC,
RTE_ETH_FILTER_GET,
&ops) ||
!ops))
code = ENOSYS;
else
return ops;
rte_flow_error_set(error, code, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
NULL, rte_strerror(code));
return NULL;
}
/* Check whether a flow rule can be created on a given port. */
int
rte_flow_validate(uint8_t port_id,
const struct rte_flow_attr *attr,
const struct rte_flow_item pattern[],
const struct rte_flow_action actions[],
struct rte_flow_error *error)
{
const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
struct rte_eth_dev *dev = &rte_eth_devices[port_id];
if (unlikely(!ops))
return -rte_errno;
if (likely(!!ops->validate))
return ops->validate(dev, attr, pattern, actions, error);
rte_flow_error_set(error, ENOSYS, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
NULL, rte_strerror(ENOSYS));
return -rte_errno;
}
/* Create a flow rule on a given port. */
struct rte_flow *
rte_flow_create(uint8_t port_id,
const struct rte_flow_attr *attr,
const struct rte_flow_item pattern[],
const struct rte_flow_action actions[],
struct rte_flow_error *error)
{
struct rte_eth_dev *dev = &rte_eth_devices[port_id];
const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
if (unlikely(!ops))
return NULL;
if (likely(!!ops->create))
return ops->create(dev, attr, pattern, actions, error);
rte_flow_error_set(error, ENOSYS, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
NULL, rte_strerror(ENOSYS));
return NULL;
}
/* Destroy a flow rule on a given port. */
int
rte_flow_destroy(uint8_t port_id,
struct rte_flow *flow,
struct rte_flow_error *error)
{
struct rte_eth_dev *dev = &rte_eth_devices[port_id];
const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
if (unlikely(!ops))
return -rte_errno;
if (likely(!!ops->destroy))
return ops->destroy(dev, flow, error);
rte_flow_error_set(error, ENOSYS, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
NULL, rte_strerror(ENOSYS));
return -rte_errno;
}
/* Destroy all flow rules associated with a port. */
int
rte_flow_flush(uint8_t port_id,
struct rte_flow_error *error)
{
struct rte_eth_dev *dev = &rte_eth_devices[port_id];
const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
if (unlikely(!ops))
return -rte_errno;
if (likely(!!ops->flush))
return ops->flush(dev, error);
rte_flow_error_set(error, ENOSYS, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
NULL, rte_strerror(ENOSYS));
return -rte_errno;
}
/* Query an existing flow rule. */
int
rte_flow_query(uint8_t port_id,
struct rte_flow *flow,
enum rte_flow_action_type action,
void *data,
struct rte_flow_error *error)
{
struct rte_eth_dev *dev = &rte_eth_devices[port_id];
const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
if (!ops)
return -rte_errno;
if (likely(!!ops->query))
return ops->query(dev, flow, action, data, error);
rte_flow_error_set(error, ENOSYS, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
NULL, rte_strerror(ENOSYS));
return -rte_errno;
}

947
lib/librte_ether/rte_flow.h Normal file
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@ -0,0 +1,947 @@
/*-
* BSD LICENSE
*
* Copyright 2016 6WIND S.A.
* Copyright 2016 Mellanox.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of 6WIND S.A. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RTE_FLOW_H_
#define RTE_FLOW_H_
/**
* @file
* RTE generic flow API
*
* This interface provides the ability to program packet matching and
* associated actions in hardware through flow rules.
*/
#include <rte_arp.h>
#include <rte_ether.h>
#include <rte_icmp.h>
#include <rte_ip.h>
#include <rte_sctp.h>
#include <rte_tcp.h>
#include <rte_udp.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* Flow rule attributes.
*
* Priorities are set on two levels: per group and per rule within groups.
*
* Lower values denote higher priority, the highest priority for both levels
* is 0, so that a rule with priority 0 in group 8 is always matched after a
* rule with priority 8 in group 0.
*
* Although optional, applications are encouraged to group similar rules as
* much as possible to fully take advantage of hardware capabilities
* (e.g. optimized matching) and work around limitations (e.g. a single
* pattern type possibly allowed in a given group).
*
* Group and priority levels are arbitrary and up to the application, they
* do not need to be contiguous nor start from 0, however the maximum number
* varies between devices and may be affected by existing flow rules.
*
* If a packet is matched by several rules of a given group for a given
* priority level, the outcome is undefined. It can take any path, may be
* duplicated or even cause unrecoverable errors.
*
* Note that support for more than a single group and priority level is not
* guaranteed.
*
* Flow rules can apply to inbound and/or outbound traffic (ingress/egress).
*
* Several pattern items and actions are valid and can be used in both
* directions. Those valid for only one direction are described as such.
*
* At least one direction must be specified.
*
* Specifying both directions at once for a given rule is not recommended
* but may be valid in a few cases (e.g. shared counter).
*/
struct rte_flow_attr {
uint32_t group; /**< Priority group. */
uint32_t priority; /**< Priority level within group. */
uint32_t ingress:1; /**< Rule applies to ingress traffic. */
uint32_t egress:1; /**< Rule applies to egress traffic. */
uint32_t reserved:30; /**< Reserved, must be zero. */
};
/**
* Matching pattern item types.
*
* Pattern items fall in two categories:
*
* - Matching protocol headers and packet data (ANY, RAW, ETH, VLAN, IPV4,
* IPV6, ICMP, UDP, TCP, SCTP, VXLAN and so on), usually associated with a
* specification structure. These must be stacked in the same order as the
* protocol layers to match, starting from the lowest.
*
* - Matching meta-data or affecting pattern processing (END, VOID, INVERT,
* PF, VF, PORT and so on), often without a specification structure. Since
* they do not match packet contents, these can be specified anywhere
* within item lists without affecting others.
*
* See the description of individual types for more information. Those
* marked with [META] fall into the second category.
*/
enum rte_flow_item_type {
/**
* [META]
*
* End marker for item lists. Prevents further processing of items,
* thereby ending the pattern.
*
* No associated specification structure.
*/
RTE_FLOW_ITEM_TYPE_END,
/**
* [META]
*
* Used as a placeholder for convenience. It is ignored and simply
* discarded by PMDs.
*
* No associated specification structure.
*/
RTE_FLOW_ITEM_TYPE_VOID,
/**
* [META]
*
* Inverted matching, i.e. process packets that do not match the
* pattern.
*
* No associated specification structure.
*/
RTE_FLOW_ITEM_TYPE_INVERT,
/**
* Matches any protocol in place of the current layer, a single ANY
* may also stand for several protocol layers.
*
* See struct rte_flow_item_any.
*/
RTE_FLOW_ITEM_TYPE_ANY,
/**
* [META]
*
* Matches packets addressed to the physical function of the device.
*
* If the underlying device function differs from the one that would
* normally receive the matched traffic, specifying this item
* prevents it from reaching that device unless the flow rule
* contains a PF action. Packets are not duplicated between device
* instances by default.
*
* No associated specification structure.
*/
RTE_FLOW_ITEM_TYPE_PF,
/**
* [META]
*
* Matches packets addressed to a virtual function ID of the device.
*
* If the underlying device function differs from the one that would
* normally receive the matched traffic, specifying this item
* prevents it from reaching that device unless the flow rule
* contains a VF action. Packets are not duplicated between device
* instances by default.
*
* See struct rte_flow_item_vf.
*/
RTE_FLOW_ITEM_TYPE_VF,
/**
* [META]
*
* Matches packets coming from the specified physical port of the
* underlying device.
*
* The first PORT item overrides the physical port normally
* associated with the specified DPDK input port (port_id). This
* item can be provided several times to match additional physical
* ports.
*
* See struct rte_flow_item_port.
*/
RTE_FLOW_ITEM_TYPE_PORT,
/**
* Matches a byte string of a given length at a given offset.
*
* See struct rte_flow_item_raw.
*/
RTE_FLOW_ITEM_TYPE_RAW,
/**
* Matches an Ethernet header.
*
* See struct rte_flow_item_eth.
*/
RTE_FLOW_ITEM_TYPE_ETH,
/**
* Matches an 802.1Q/ad VLAN tag.
*
* See struct rte_flow_item_vlan.
*/
RTE_FLOW_ITEM_TYPE_VLAN,
/**
* Matches an IPv4 header.
*
* See struct rte_flow_item_ipv4.
*/
RTE_FLOW_ITEM_TYPE_IPV4,
/**
* Matches an IPv6 header.
*
* See struct rte_flow_item_ipv6.
*/
RTE_FLOW_ITEM_TYPE_IPV6,
/**
* Matches an ICMP header.
*
* See struct rte_flow_item_icmp.
*/
RTE_FLOW_ITEM_TYPE_ICMP,
/**
* Matches a UDP header.
*
* See struct rte_flow_item_udp.
*/
RTE_FLOW_ITEM_TYPE_UDP,
/**
* Matches a TCP header.
*
* See struct rte_flow_item_tcp.
*/
RTE_FLOW_ITEM_TYPE_TCP,
/**
* Matches a SCTP header.
*
* See struct rte_flow_item_sctp.
*/
RTE_FLOW_ITEM_TYPE_SCTP,
/**
* Matches a VXLAN header.
*
* See struct rte_flow_item_vxlan.
*/
RTE_FLOW_ITEM_TYPE_VXLAN,
};
/**
* RTE_FLOW_ITEM_TYPE_ANY
*
* Matches any protocol in place of the current layer, a single ANY may also
* stand for several protocol layers.
*
* This is usually specified as the first pattern item when looking for a
* protocol anywhere in a packet.
*
* A zeroed mask stands for any number of layers.
*/
struct rte_flow_item_any {
uint32_t num; /* Number of layers covered. */
};
/**
* RTE_FLOW_ITEM_TYPE_VF
*
* Matches packets addressed to a virtual function ID of the device.
*
* If the underlying device function differs from the one that would
* normally receive the matched traffic, specifying this item prevents it
* from reaching that device unless the flow rule contains a VF
* action. Packets are not duplicated between device instances by default.
*
* - Likely to return an error or never match any traffic if this causes a
* VF device to match traffic addressed to a different VF.
* - Can be specified multiple times to match traffic addressed to several
* VF IDs.
* - Can be combined with a PF item to match both PF and VF traffic.
*
* A zeroed mask can be used to match any VF ID.
*/
struct rte_flow_item_vf {
uint32_t id; /**< Destination VF ID. */
};
/**
* RTE_FLOW_ITEM_TYPE_PORT
*
* Matches packets coming from the specified physical port of the underlying
* device.
*
* The first PORT item overrides the physical port normally associated with
* the specified DPDK input port (port_id). This item can be provided
* several times to match additional physical ports.
*
* Note that physical ports are not necessarily tied to DPDK input ports
* (port_id) when those are not under DPDK control. Possible values are
* specific to each device, they are not necessarily indexed from zero and
* may not be contiguous.
*
* As a device property, the list of allowed values as well as the value
* associated with a port_id should be retrieved by other means.
*
* A zeroed mask can be used to match any port index.
*/
struct rte_flow_item_port {
uint32_t index; /**< Physical port index. */
};
/**
* RTE_FLOW_ITEM_TYPE_RAW
*
* Matches a byte string of a given length at a given offset.
*
* Offset is either absolute (using the start of the packet) or relative to
* the end of the previous matched item in the stack, in which case negative
* values are allowed.
*
* If search is enabled, offset is used as the starting point. The search
* area can be delimited by setting limit to a nonzero value, which is the
* maximum number of bytes after offset where the pattern may start.
*
* Matching a zero-length pattern is allowed, doing so resets the relative
* offset for subsequent items.
*
* This type does not support ranges (struct rte_flow_item.last).
*/
struct rte_flow_item_raw {
uint32_t relative:1; /**< Look for pattern after the previous item. */
uint32_t search:1; /**< Search pattern from offset (see also limit). */
uint32_t reserved:30; /**< Reserved, must be set to zero. */
int32_t offset; /**< Absolute or relative offset for pattern. */
uint16_t limit; /**< Search area limit for start of pattern. */
uint16_t length; /**< Pattern length. */
uint8_t pattern[]; /**< Byte string to look for. */
};
/**
* RTE_FLOW_ITEM_TYPE_ETH
*
* Matches an Ethernet header.
*/
struct rte_flow_item_eth {
struct ether_addr dst; /**< Destination MAC. */
struct ether_addr src; /**< Source MAC. */
uint16_t type; /**< EtherType. */
};
/**
* RTE_FLOW_ITEM_TYPE_VLAN
*
* Matches an 802.1Q/ad VLAN tag.
*
* This type normally follows either RTE_FLOW_ITEM_TYPE_ETH or
* RTE_FLOW_ITEM_TYPE_VLAN.
*/
struct rte_flow_item_vlan {
uint16_t tpid; /**< Tag protocol identifier. */
uint16_t tci; /**< Tag control information. */
};
/**
* RTE_FLOW_ITEM_TYPE_IPV4
*
* Matches an IPv4 header.
*
* Note: IPv4 options are handled by dedicated pattern items.
*/
struct rte_flow_item_ipv4 {
struct ipv4_hdr hdr; /**< IPv4 header definition. */
};
/**
* RTE_FLOW_ITEM_TYPE_IPV6.
*
* Matches an IPv6 header.
*
* Note: IPv6 options are handled by dedicated pattern items.
*/
struct rte_flow_item_ipv6 {
struct ipv6_hdr hdr; /**< IPv6 header definition. */
};
/**
* RTE_FLOW_ITEM_TYPE_ICMP.
*
* Matches an ICMP header.
*/
struct rte_flow_item_icmp {
struct icmp_hdr hdr; /**< ICMP header definition. */
};
/**
* RTE_FLOW_ITEM_TYPE_UDP.
*
* Matches a UDP header.
*/
struct rte_flow_item_udp {
struct udp_hdr hdr; /**< UDP header definition. */
};
/**
* RTE_FLOW_ITEM_TYPE_TCP.
*
* Matches a TCP header.
*/
struct rte_flow_item_tcp {
struct tcp_hdr hdr; /**< TCP header definition. */
};
/**
* RTE_FLOW_ITEM_TYPE_SCTP.
*
* Matches a SCTP header.
*/
struct rte_flow_item_sctp {
struct sctp_hdr hdr; /**< SCTP header definition. */
};
/**
* RTE_FLOW_ITEM_TYPE_VXLAN.
*
* Matches a VXLAN header (RFC 7348).
*/
struct rte_flow_item_vxlan {
uint8_t flags; /**< Normally 0x08 (I flag). */
uint8_t rsvd0[3]; /**< Reserved, normally 0x000000. */
uint8_t vni[3]; /**< VXLAN identifier. */
uint8_t rsvd1; /**< Reserved, normally 0x00. */
};
/**
* Matching pattern item definition.
*
* A pattern is formed by stacking items starting from the lowest protocol
* layer to match. This stacking restriction does not apply to meta items
* which can be placed anywhere in the stack without affecting the meaning
* of the resulting pattern.
*
* Patterns are terminated by END items.
*
* The spec field should be a valid pointer to a structure of the related
* item type. It may be set to NULL in many cases to use default values.
*
* Optionally, last can point to a structure of the same type to define an
* inclusive range. This is mostly supported by integer and address fields,
* may cause errors otherwise. Fields that do not support ranges must be set
* to 0 or to the same value as the corresponding fields in spec.
*
* By default all fields present in spec are considered relevant (see note
* below). This behavior can be altered by providing a mask structure of the
* same type with applicable bits set to one. It can also be used to
* partially filter out specific fields (e.g. as an alternate mean to match
* ranges of IP addresses).
*
* Mask is a simple bit-mask applied before interpreting the contents of
* spec and last, which may yield unexpected results if not used
* carefully. For example, if for an IPv4 address field, spec provides
* 10.1.2.3, last provides 10.3.4.5 and mask provides 255.255.0.0, the
* effective range becomes 10.1.0.0 to 10.3.255.255.
*
* Note: the defaults for data-matching items such as IPv4 when mask is not
* specified actually depend on the underlying implementation since only
* recognized fields can be taken into account.
*/
struct rte_flow_item {
enum rte_flow_item_type type; /**< Item type. */
const void *spec; /**< Pointer to item specification structure. */
const void *last; /**< Defines an inclusive range (spec to last). */
const void *mask; /**< Bit-mask applied to spec and last. */
};
/**
* Action types.
*
* Each possible action is represented by a type. Some have associated
* configuration structures. Several actions combined in a list can be
* affected to a flow rule. That list is not ordered.
*
* They fall in three categories:
*
* - Terminating actions (such as QUEUE, DROP, RSS, PF, VF) that prevent
* processing matched packets by subsequent flow rules, unless overridden
* with PASSTHRU.
*
* - Non terminating actions (PASSTHRU, DUP) that leave matched packets up
* for additional processing by subsequent flow rules.
*
* - Other non terminating meta actions that do not affect the fate of
* packets (END, VOID, MARK, FLAG, COUNT).
*
* When several actions are combined in a flow rule, they should all have
* different types (e.g. dropping a packet twice is not possible).
*
* Only the last action of a given type is taken into account. PMDs still
* perform error checking on the entire list.
*
* Note that PASSTHRU is the only action able to override a terminating
* rule.
*/
enum rte_flow_action_type {
/**
* [META]
*
* End marker for action lists. Prevents further processing of
* actions, thereby ending the list.
*
* No associated configuration structure.
*/
RTE_FLOW_ACTION_TYPE_END,
/**
* [META]
*
* Used as a placeholder for convenience. It is ignored and simply
* discarded by PMDs.
*
* No associated configuration structure.
*/
RTE_FLOW_ACTION_TYPE_VOID,
/**
* Leaves packets up for additional processing by subsequent flow
* rules. This is the default when a rule does not contain a
* terminating action, but can be specified to force a rule to
* become non-terminating.
*
* No associated configuration structure.
*/
RTE_FLOW_ACTION_TYPE_PASSTHRU,
/**
* [META]
*
* Attaches a 32 bit value to packets.
*
* See struct rte_flow_action_mark.
*/
RTE_FLOW_ACTION_TYPE_MARK,
/**
* [META]
*
* Flag packets. Similar to MARK but only affects ol_flags.
*
* Note: a distinctive flag must be defined for it.
*
* No associated configuration structure.
*/
RTE_FLOW_ACTION_TYPE_FLAG,
/**
* Assigns packets to a given queue index.
*
* See struct rte_flow_action_queue.
*/
RTE_FLOW_ACTION_TYPE_QUEUE,
/**
* Drops packets.
*
* PASSTHRU overrides this action if both are specified.
*
* No associated configuration structure.
*/
RTE_FLOW_ACTION_TYPE_DROP,
/**
* [META]
*
* Enables counters for this rule.
*
* These counters can be retrieved and reset through rte_flow_query(),
* see struct rte_flow_query_count.
*
* No associated configuration structure.
*/
RTE_FLOW_ACTION_TYPE_COUNT,
/**
* Duplicates packets to a given queue index.
*
* This is normally combined with QUEUE, however when used alone, it
* is actually similar to QUEUE + PASSTHRU.
*
* See struct rte_flow_action_dup.
*/
RTE_FLOW_ACTION_TYPE_DUP,
/**
* Similar to QUEUE, except RSS is additionally performed on packets
* to spread them among several queues according to the provided
* parameters.
*
* See struct rte_flow_action_rss.
*/
RTE_FLOW_ACTION_TYPE_RSS,
/**
* Redirects packets to the physical function (PF) of the current
* device.
*
* No associated configuration structure.
*/
RTE_FLOW_ACTION_TYPE_PF,
/**
* Redirects packets to the virtual function (VF) of the current
* device with the specified ID.
*
* See struct rte_flow_action_vf.
*/
RTE_FLOW_ACTION_TYPE_VF,
};
/**
* RTE_FLOW_ACTION_TYPE_MARK
*
* Attaches a 32 bit value to packets.
*
* This value is arbitrary and application-defined. For compatibility with
* FDIR it is returned in the hash.fdir.hi mbuf field. PKT_RX_FDIR_ID is
* also set in ol_flags.
*/
struct rte_flow_action_mark {
uint32_t id; /**< 32 bit value to return with packets. */
};
/**
* RTE_FLOW_ACTION_TYPE_QUEUE
*
* Assign packets to a given queue index.
*
* Terminating by default.
*/
struct rte_flow_action_queue {
uint16_t index; /**< Queue index to use. */
};
/**
* RTE_FLOW_ACTION_TYPE_COUNT (query)
*
* Query structure to retrieve and reset flow rule counters.
*/
struct rte_flow_query_count {
uint32_t reset:1; /**< Reset counters after query [in]. */
uint32_t hits_set:1; /**< hits field is set [out]. */
uint32_t bytes_set:1; /**< bytes field is set [out]. */
uint32_t reserved:29; /**< Reserved, must be zero [in, out]. */
uint64_t hits; /**< Number of hits for this rule [out]. */
uint64_t bytes; /**< Number of bytes through this rule [out]. */
};
/**
* RTE_FLOW_ACTION_TYPE_DUP
*
* Duplicates packets to a given queue index.
*
* This is normally combined with QUEUE, however when used alone, it is
* actually similar to QUEUE + PASSTHRU.
*
* Non-terminating by default.
*/
struct rte_flow_action_dup {
uint16_t index; /**< Queue index to duplicate packets to. */
};
/**
* RTE_FLOW_ACTION_TYPE_RSS
*
* Similar to QUEUE, except RSS is additionally performed on packets to
* spread them among several queues according to the provided parameters.
*
* Note: RSS hash result is normally stored in the hash.rss mbuf field,
* however it conflicts with the MARK action as they share the same
* space. When both actions are specified, the RSS hash is discarded and
* PKT_RX_RSS_HASH is not set in ol_flags. MARK has priority. The mbuf
* structure should eventually evolve to store both.
*
* Terminating by default.
*/
struct rte_flow_action_rss {
const struct rte_eth_rss_conf *rss_conf; /**< RSS parameters. */
uint16_t num; /**< Number of entries in queue[]. */
uint16_t queue[]; /**< Queues indices to use. */
};
/**
* RTE_FLOW_ACTION_TYPE_VF
*
* Redirects packets to a virtual function (VF) of the current device.
*
* Packets matched by a VF pattern item can be redirected to their original
* VF ID instead of the specified one. This parameter may not be available
* and is not guaranteed to work properly if the VF part is matched by a
* prior flow rule or if packets are not addressed to a VF in the first
* place.
*
* Terminating by default.
*/
struct rte_flow_action_vf {
uint32_t original:1; /**< Use original VF ID if possible. */
uint32_t reserved:31; /**< Reserved, must be zero. */
uint32_t id; /**< VF ID to redirect packets to. */
};
/**
* Definition of a single action.
*
* A list of actions is terminated by a END action.
*
* For simple actions without a configuration structure, conf remains NULL.
*/
struct rte_flow_action {
enum rte_flow_action_type type; /**< Action type. */
const void *conf; /**< Pointer to action configuration structure. */
};
/**
* Opaque type returned after successfully creating a flow.
*
* This handle can be used to manage and query the related flow (e.g. to
* destroy it or retrieve counters).
*/
struct rte_flow;
/**
* Verbose error types.
*
* Most of them provide the type of the object referenced by struct
* rte_flow_error.cause.
*/
enum rte_flow_error_type {
RTE_FLOW_ERROR_TYPE_NONE, /**< No error. */
RTE_FLOW_ERROR_TYPE_UNSPECIFIED, /**< Cause unspecified. */
RTE_FLOW_ERROR_TYPE_HANDLE, /**< Flow rule (handle). */
RTE_FLOW_ERROR_TYPE_ATTR_GROUP, /**< Group field. */
RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, /**< Priority field. */
RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, /**< Ingress field. */
RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, /**< Egress field. */
RTE_FLOW_ERROR_TYPE_ATTR, /**< Attributes structure. */
RTE_FLOW_ERROR_TYPE_ITEM_NUM, /**< Pattern length. */
RTE_FLOW_ERROR_TYPE_ITEM, /**< Specific pattern item. */
RTE_FLOW_ERROR_TYPE_ACTION_NUM, /**< Number of actions. */
RTE_FLOW_ERROR_TYPE_ACTION, /**< Specific action. */
};
/**
* Verbose error structure definition.
*
* This object is normally allocated by applications and set by PMDs, the
* message points to a constant string which does not need to be freed by
* the application, however its pointer can be considered valid only as long
* as its associated DPDK port remains configured. Closing the underlying
* device or unloading the PMD invalidates it.
*
* Both cause and message may be NULL regardless of the error type.
*/
struct rte_flow_error {
enum rte_flow_error_type type; /**< Cause field and error types. */
const void *cause; /**< Object responsible for the error. */
const char *message; /**< Human-readable error message. */
};
/**
* Check whether a flow rule can be created on a given port.
*
* While this function has no effect on the target device, the flow rule is
* validated against its current configuration state and the returned value
* should be considered valid by the caller for that state only.
*
* The returned value is guaranteed to remain valid only as long as no
* successful calls to rte_flow_create() or rte_flow_destroy() are made in
* the meantime and no device parameter affecting flow rules in any way are
* modified, due to possible collisions or resource limitations (although in
* such cases EINVAL should not be returned).
*
* @param port_id
* Port identifier of Ethernet device.
* @param[in] attr
* Flow rule attributes.
* @param[in] pattern
* Pattern specification (list terminated by the END pattern item).
* @param[in] actions
* Associated actions (list terminated by the END action).
* @param[out] error
* Perform verbose error reporting if not NULL. PMDs initialize this
* structure in case of error only.
*
* @return
* 0 if flow rule is valid and can be created. A negative errno value
* otherwise (rte_errno is also set), the following errors are defined:
*
* -ENOSYS: underlying device does not support this functionality.
*
* -EINVAL: unknown or invalid rule specification.
*
* -ENOTSUP: valid but unsupported rule specification (e.g. partial
* bit-masks are unsupported).
*
* -EEXIST: collision with an existing rule.
*
* -ENOMEM: not enough resources.
*
* -EBUSY: action cannot be performed due to busy device resources, may
* succeed if the affected queues or even the entire port are in a stopped
* state (see rte_eth_dev_rx_queue_stop() and rte_eth_dev_stop()).
*/
int
rte_flow_validate(uint8_t port_id,
const struct rte_flow_attr *attr,
const struct rte_flow_item pattern[],
const struct rte_flow_action actions[],
struct rte_flow_error *error);
/**
* Create a flow rule on a given port.
*
* @param port_id
* Port identifier of Ethernet device.
* @param[in] attr
* Flow rule attributes.
* @param[in] pattern
* Pattern specification (list terminated by the END pattern item).
* @param[in] actions
* Associated actions (list terminated by the END action).
* @param[out] error
* Perform verbose error reporting if not NULL. PMDs initialize this
* structure in case of error only.
*
* @return
* A valid handle in case of success, NULL otherwise and rte_errno is set
* to the positive version of one of the error codes defined for
* rte_flow_validate().
*/
struct rte_flow *
rte_flow_create(uint8_t port_id,
const struct rte_flow_attr *attr,
const struct rte_flow_item pattern[],
const struct rte_flow_action actions[],
struct rte_flow_error *error);
/**
* Destroy a flow rule on a given port.
*
* Failure to destroy a flow rule handle may occur when other flow rules
* depend on it, and destroying it would result in an inconsistent state.
*
* This function is only guaranteed to succeed if handles are destroyed in
* reverse order of their creation.
*
* @param port_id
* Port identifier of Ethernet device.
* @param flow
* Flow rule handle to destroy.
* @param[out] error
* Perform verbose error reporting if not NULL. PMDs initialize this
* structure in case of error only.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
rte_flow_destroy(uint8_t port_id,
struct rte_flow *flow,
struct rte_flow_error *error);
/**
* Destroy all flow rules associated with a port.
*
* In the unlikely event of failure, handles are still considered destroyed
* and no longer valid but the port must be assumed to be in an inconsistent
* state.
*
* @param port_id
* Port identifier of Ethernet device.
* @param[out] error
* Perform verbose error reporting if not NULL. PMDs initialize this
* structure in case of error only.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
rte_flow_flush(uint8_t port_id,
struct rte_flow_error *error);
/**
* Query an existing flow rule.
*
* This function allows retrieving flow-specific data such as counters.
* Data is gathered by special actions which must be present in the flow
* rule definition.
*
* \see RTE_FLOW_ACTION_TYPE_COUNT
*
* @param port_id
* Port identifier of Ethernet device.
* @param flow
* Flow rule handle to query.
* @param action
* Action type to query.
* @param[in, out] data
* Pointer to storage for the associated query data type.
* @param[out] error
* Perform verbose error reporting if not NULL. PMDs initialize this
* structure in case of error only.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
int
rte_flow_query(uint8_t port_id,
struct rte_flow *flow,
enum rte_flow_action_type action,
void *data,
struct rte_flow_error *error);
#ifdef __cplusplus
}
#endif
#endif /* RTE_FLOW_H_ */

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@ -0,0 +1,182 @@
/*-
* BSD LICENSE
*
* Copyright 2016 6WIND S.A.
* Copyright 2016 Mellanox.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of 6WIND S.A. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RTE_FLOW_DRIVER_H_
#define RTE_FLOW_DRIVER_H_
/**
* @file
* RTE generic flow API (driver side)
*
* This file provides implementation helpers for internal use by PMDs, they
* are not intended to be exposed to applications and are not subject to ABI
* versioning.
*/
#include <stdint.h>
#include <rte_errno.h>
#include "rte_ethdev.h"
#include "rte_flow.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Generic flow operations structure implemented and returned by PMDs.
*
* To implement this API, PMDs must handle the RTE_ETH_FILTER_GENERIC filter
* type in their .filter_ctrl callback function (struct eth_dev_ops) as well
* as the RTE_ETH_FILTER_GET filter operation.
*
* If successful, this operation must result in a pointer to a PMD-specific
* struct rte_flow_ops written to the argument address as described below:
*
* \code
*
* // PMD filter_ctrl callback
*
* static const struct rte_flow_ops pmd_flow_ops = { ... };
*
* switch (filter_type) {
* case RTE_ETH_FILTER_GENERIC:
* if (filter_op != RTE_ETH_FILTER_GET)
* return -EINVAL;
* *(const void **)arg = &pmd_flow_ops;
* return 0;
* }
*
* \endcode
*
* See also rte_flow_ops_get().
*
* These callback functions are not supposed to be used by applications
* directly, which must rely on the API defined in rte_flow.h.
*
* Public-facing wrapper functions perform a few consistency checks so that
* unimplemented (i.e. NULL) callbacks simply return -ENOTSUP. These
* callbacks otherwise only differ by their first argument (with port ID
* already resolved to a pointer to struct rte_eth_dev).
*/
struct rte_flow_ops {
/** See rte_flow_validate(). */
int (*validate)
(struct rte_eth_dev *,
const struct rte_flow_attr *,
const struct rte_flow_item [],
const struct rte_flow_action [],
struct rte_flow_error *);
/** See rte_flow_create(). */
struct rte_flow *(*create)
(struct rte_eth_dev *,
const struct rte_flow_attr *,
const struct rte_flow_item [],
const struct rte_flow_action [],
struct rte_flow_error *);
/** See rte_flow_destroy(). */
int (*destroy)
(struct rte_eth_dev *,
struct rte_flow *,
struct rte_flow_error *);
/** See rte_flow_flush(). */
int (*flush)
(struct rte_eth_dev *,
struct rte_flow_error *);
/** See rte_flow_query(). */
int (*query)
(struct rte_eth_dev *,
struct rte_flow *,
enum rte_flow_action_type,
void *,
struct rte_flow_error *);
};
/**
* Initialize generic flow error structure.
*
* This function also sets rte_errno to a given value.
*
* @param[out] error
* Pointer to flow error structure (may be NULL).
* @param code
* Related error code (rte_errno).
* @param type
* Cause field and error types.
* @param cause
* Object responsible for the error.
* @param message
* Human-readable error message.
*
* @return
* Pointer to flow error structure.
*/
static inline struct rte_flow_error *
rte_flow_error_set(struct rte_flow_error *error,
int code,
enum rte_flow_error_type type,
const void *cause,
const char *message)
{
if (error) {
*error = (struct rte_flow_error){
.type = type,
.cause = cause,
.message = message,
};
}
rte_errno = code;
return error;
}
/**
* Get generic flow operations structure from a port.
*
* @param port_id
* Port identifier to query.
* @param[out] error
* Pointer to flow error structure.
*
* @return
* The flow operations structure associated with port_id, NULL in case of
* error, in which case rte_errno is set and the error structure contains
* additional details.
*/
const struct rte_flow_ops *
rte_flow_ops_get(uint8_t port_id, struct rte_flow_error *error);
#ifdef __cplusplus
}
#endif
#endif /* RTE_FLOW_DRIVER_H_ */