d12354a56c
Some applications forward from/to host rings most or all the traffic received or sent on a physical interface. In this cases it is desirable to have more than a pair of RX/TX host rings, and use multiple threads to speed up forwarding. This change adds support for multiple host rings. On registering a netmap port, the user can specify the number of desired receive and transmit host rings in the nr_host_tx_rings and nr_host_rx_rings fields of the nmreq_register structure. MFC after: 2 weeks
258 lines
9.5 KiB
C
258 lines
9.5 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (C) 2011-2014 Matteo Landi, Luigi Rizzo. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``S 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 AUTHOR 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 _NET_NETMAP_LEGACY_H_
|
|
#define _NET_NETMAP_LEGACY_H_
|
|
|
|
/*
|
|
* $FreeBSD$
|
|
*
|
|
* ioctl names and related fields
|
|
*
|
|
* NIOCTXSYNC, NIOCRXSYNC synchronize tx or rx queues,
|
|
* whose identity is set in NIOCREGIF through nr_ringid.
|
|
* These are non blocking and take no argument.
|
|
*
|
|
* NIOCGINFO takes a struct ifreq, the interface name is the input,
|
|
* the outputs are number of queues and number of descriptor
|
|
* for each queue (useful to set number of threads etc.).
|
|
* The info returned is only advisory and may change before
|
|
* the interface is bound to a file descriptor.
|
|
*
|
|
* NIOCREGIF takes an interface name within a struct nmre,
|
|
* and activates netmap mode on the interface (if possible).
|
|
*
|
|
* The argument to NIOCGINFO/NIOCREGIF overlays struct ifreq so we
|
|
* can pass it down to other NIC-related ioctls.
|
|
*
|
|
* The actual argument (struct nmreq) has a number of options to request
|
|
* different functions.
|
|
* The following are used in NIOCREGIF when nr_cmd == 0:
|
|
*
|
|
* nr_name (in)
|
|
* The name of the port (em0, valeXXX:YYY, etc.)
|
|
* limited to IFNAMSIZ for backward compatibility.
|
|
*
|
|
* nr_version (in/out)
|
|
* Must match NETMAP_API as used in the kernel, error otherwise.
|
|
* Always returns the desired value on output.
|
|
*
|
|
* nr_tx_slots, nr_tx_slots, nr_tx_rings, nr_rx_rings (in/out)
|
|
* On input, non-zero values may be used to reconfigure the port
|
|
* according to the requested values, but this is not guaranteed.
|
|
* On output the actual values in use are reported.
|
|
*
|
|
* nr_ringid (in)
|
|
* Indicates how rings should be bound to the file descriptors.
|
|
* If nr_flags != 0, then the low bits (in NETMAP_RING_MASK)
|
|
* are used to indicate the ring number, and nr_flags specifies
|
|
* the actual rings to bind. NETMAP_NO_TX_POLL is unaffected.
|
|
*
|
|
* NOTE: THE FOLLOWING (nr_flags == 0) IS DEPRECATED:
|
|
* If nr_flags == 0, NETMAP_HW_RING and NETMAP_SW_RING control
|
|
* the binding as follows:
|
|
* 0 (default) binds all physical rings
|
|
* NETMAP_HW_RING | ring number binds a single ring pair
|
|
* NETMAP_SW_RING binds only the host tx/rx rings
|
|
*
|
|
* NETMAP_NO_TX_POLL can be OR-ed to make select()/poll() push
|
|
* packets on tx rings only if POLLOUT is set.
|
|
* The default is to push any pending packet.
|
|
*
|
|
* NETMAP_DO_RX_POLL can be OR-ed to make select()/poll() release
|
|
* packets on rx rings also when POLLIN is NOT set.
|
|
* The default is to touch the rx ring only with POLLIN.
|
|
* Note that this is the opposite of TX because it
|
|
* reflects the common usage.
|
|
*
|
|
* NOTE: NETMAP_PRIV_MEM IS DEPRECATED, use nr_arg2 instead.
|
|
* NETMAP_PRIV_MEM is set on return for ports that do not use
|
|
* the global memory allocator.
|
|
* This information is not significant and applications
|
|
* should look at the region id in nr_arg2
|
|
*
|
|
* nr_flags is the recommended mode to indicate which rings should
|
|
* be bound to a file descriptor. Values are NR_REG_*
|
|
*
|
|
* nr_arg1 (in) Reserved.
|
|
*
|
|
* nr_arg2 (in/out) The identity of the memory region used.
|
|
* On input, 0 means the system decides autonomously,
|
|
* other values may try to select a specific region.
|
|
* On return the actual value is reported.
|
|
* Region '1' is the global allocator, normally shared
|
|
* by all interfaces. Other values are private regions.
|
|
* If two ports the same region zero-copy is possible.
|
|
*
|
|
* nr_arg3 (in/out) number of extra buffers to be allocated.
|
|
*
|
|
*
|
|
*
|
|
* nr_cmd (in) if non-zero indicates a special command:
|
|
* NETMAP_BDG_ATTACH and nr_name = vale*:ifname
|
|
* attaches the NIC to the switch; nr_ringid specifies
|
|
* which rings to use. Used by vale-ctl -a ...
|
|
* nr_arg1 = NETMAP_BDG_HOST also attaches the host port
|
|
* as in vale-ctl -h ...
|
|
*
|
|
* NETMAP_BDG_DETACH and nr_name = vale*:ifname
|
|
* disconnects a previously attached NIC.
|
|
* Used by vale-ctl -d ...
|
|
*
|
|
* NETMAP_BDG_LIST
|
|
* list the configuration of VALE switches.
|
|
*
|
|
* NETMAP_BDG_VNET_HDR
|
|
* Set the virtio-net header length used by the client
|
|
* of a VALE switch port.
|
|
*
|
|
* NETMAP_BDG_NEWIF
|
|
* create a persistent VALE port with name nr_name.
|
|
* Used by vale-ctl -n ...
|
|
*
|
|
* NETMAP_BDG_DELIF
|
|
* delete a persistent VALE port. Used by vale-ctl -d ...
|
|
*
|
|
* nr_arg1, nr_arg2, nr_arg3 (in/out) command specific
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
|
|
|
|
/*
|
|
* struct nmreq overlays a struct ifreq (just the name)
|
|
*/
|
|
struct nmreq {
|
|
char nr_name[IFNAMSIZ];
|
|
uint32_t nr_version; /* API version */
|
|
uint32_t nr_offset; /* nifp offset in the shared region */
|
|
uint32_t nr_memsize; /* size of the shared region */
|
|
uint32_t nr_tx_slots; /* slots in tx rings */
|
|
uint32_t nr_rx_slots; /* slots in rx rings */
|
|
uint16_t nr_tx_rings; /* number of tx rings */
|
|
uint16_t nr_rx_rings; /* number of rx rings */
|
|
|
|
uint16_t nr_ringid; /* ring(s) we care about */
|
|
#define NETMAP_HW_RING 0x4000 /* single NIC ring pair */
|
|
#define NETMAP_SW_RING 0x2000 /* only host ring pair */
|
|
|
|
#define NETMAP_RING_MASK 0x0fff /* the ring number */
|
|
|
|
#define NETMAP_NO_TX_POLL 0x1000 /* no automatic txsync on poll */
|
|
|
|
#define NETMAP_DO_RX_POLL 0x8000 /* DO automatic rxsync on poll */
|
|
|
|
uint16_t nr_cmd;
|
|
#define NETMAP_BDG_ATTACH 1 /* attach the NIC */
|
|
#define NETMAP_BDG_DETACH 2 /* detach the NIC */
|
|
#define NETMAP_BDG_REGOPS 3 /* register bridge callbacks */
|
|
#define NETMAP_BDG_LIST 4 /* get bridge's info */
|
|
#define NETMAP_BDG_VNET_HDR 5 /* set the port virtio-net-hdr length */
|
|
#define NETMAP_BDG_NEWIF 6 /* create a virtual port */
|
|
#define NETMAP_BDG_DELIF 7 /* destroy a virtual port */
|
|
#define NETMAP_PT_HOST_CREATE 8 /* create ptnetmap kthreads */
|
|
#define NETMAP_PT_HOST_DELETE 9 /* delete ptnetmap kthreads */
|
|
#define NETMAP_BDG_POLLING_ON 10 /* delete polling kthread */
|
|
#define NETMAP_BDG_POLLING_OFF 11 /* delete polling kthread */
|
|
#define NETMAP_VNET_HDR_GET 12 /* get the port virtio-net-hdr length */
|
|
uint16_t nr_arg1; /* extra arguments */
|
|
#define NETMAP_BDG_HOST 1 /* nr_arg1 value for NETMAP_BDG_ATTACH */
|
|
|
|
uint16_t nr_arg2; /* id of the memory allocator */
|
|
uint32_t nr_arg3; /* req. extra buffers in NIOCREGIF */
|
|
uint32_t nr_flags; /* specify NR_REG_* mode and other flags */
|
|
#define NR_REG_MASK 0xf /* to extract NR_REG_* mode from nr_flags */
|
|
/* various modes, extends nr_ringid */
|
|
uint32_t spare2[1];
|
|
};
|
|
|
|
#ifdef _WIN32
|
|
/*
|
|
* Windows does not have _IOWR(). _IO(), _IOW() and _IOR() are defined
|
|
* in ws2def.h but not sure if they are in the form we need.
|
|
* We therefore redefine them in a convenient way to use for DeviceIoControl
|
|
* signatures.
|
|
*/
|
|
#undef _IO // ws2def.h
|
|
#define _WIN_NM_IOCTL_TYPE 40000
|
|
#define _IO(_c, _n) CTL_CODE(_WIN_NM_IOCTL_TYPE, ((_n) + 0x800) , \
|
|
METHOD_BUFFERED, FILE_ANY_ACCESS )
|
|
#define _IO_direct(_c, _n) CTL_CODE(_WIN_NM_IOCTL_TYPE, ((_n) + 0x800) , \
|
|
METHOD_OUT_DIRECT, FILE_ANY_ACCESS )
|
|
|
|
#define _IOWR(_c, _n, _s) _IO(_c, _n)
|
|
|
|
/* We havesome internal sysctl in addition to the externally visible ones */
|
|
#define NETMAP_MMAP _IO_direct('i', 160) // note METHOD_OUT_DIRECT
|
|
#define NETMAP_POLL _IO('i', 162)
|
|
|
|
/* and also two setsockopt for sysctl emulation */
|
|
#define NETMAP_SETSOCKOPT _IO('i', 140)
|
|
#define NETMAP_GETSOCKOPT _IO('i', 141)
|
|
|
|
|
|
/* These linknames are for the Netmap Core Driver */
|
|
#define NETMAP_NT_DEVICE_NAME L"\\Device\\NETMAP"
|
|
#define NETMAP_DOS_DEVICE_NAME L"\\DosDevices\\netmap"
|
|
|
|
/* Definition of a structure used to pass a virtual address within an IOCTL */
|
|
typedef struct _MEMORY_ENTRY {
|
|
PVOID pUsermodeVirtualAddress;
|
|
} MEMORY_ENTRY, *PMEMORY_ENTRY;
|
|
|
|
typedef struct _POLL_REQUEST_DATA {
|
|
int events;
|
|
int timeout;
|
|
int revents;
|
|
} POLL_REQUEST_DATA;
|
|
#endif /* _WIN32 */
|
|
|
|
/*
|
|
* Opaque structure that is passed to an external kernel
|
|
* module via ioctl(fd, NIOCCONFIG, req) for a user-owned
|
|
* bridge port (at this point ephemeral VALE interface).
|
|
*/
|
|
#define NM_IFRDATA_LEN 256
|
|
struct nm_ifreq {
|
|
char nifr_name[IFNAMSIZ];
|
|
char data[NM_IFRDATA_LEN];
|
|
};
|
|
|
|
/*
|
|
* FreeBSD uses the size value embedded in the _IOWR to determine
|
|
* how much to copy in/out. So we need it to match the actual
|
|
* data structure we pass. We put some spares in the structure
|
|
* to ease compatibility with other versions
|
|
*/
|
|
#define NIOCGINFO _IOWR('i', 145, struct nmreq) /* return IF info */
|
|
#define NIOCREGIF _IOWR('i', 146, struct nmreq) /* interface register */
|
|
#define NIOCCONFIG _IOWR('i',150, struct nm_ifreq) /* for ext. modules */
|
|
|
|
#endif /* _NET_NETMAP_LEGACY_H_ */
|