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freebsd-dev/sys/net/flowtable.h

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- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
/**************************************************************************
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
Copyright (c) 2008-2010, BitGravity Inc.
- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
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. Neither the name of the BitGravity Corporation 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.
$FreeBSD$
***************************************************************************/
#ifndef _NET_FLOWTABLE_H_
#define _NET_FLOWTABLE_H_
#ifdef _KERNEL
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
#define FL_HASH_ALL (1<<0) /* hash 4-tuple + protocol */
- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
#define FL_PCPU (1<<1) /* pcpu cache */
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
#define FL_NOAUTO (1<<2) /* don't automatically add flentry on miss */
allocate ipv6 flows from the ipv6 flow zone reported by: rrs@ MFC after: 3 days
2010-05-16 21:48:39 +00:00
#define FL_IPV6 (1<<9)
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
#define FL_TCP (1<<11)
#define FL_SCTP (1<<12)
#define FL_UDP (1<<13)
#define FL_DEBUG (1<<14)
#define FL_DEBUG_ALL (1<<15)
- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
struct flowtable;
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
struct flentry;
struct route;
struct route_in6;
Build on Jeff Roberson's linker-set based dynamic per-CPU allocator (DPCPU), as suggested by Peter Wemm, and implement a new per-virtual network stack memory allocator. Modify vnet to use the allocator instead of monolithic global container structures (vinet, ...). This change solves many binary compatibility problems associated with VIMAGE, and restores ELF symbols for virtualized global variables. Each virtualized global variable exists as a "reference copy", and also once per virtual network stack. Virtualized global variables are tagged at compile-time, placing the in a special linker set, which is loaded into a contiguous region of kernel memory. Virtualized global variables in the base kernel are linked as normal, but those in modules are copied and relocated to a reserved portion of the kernel's vnet region with the help of a the kernel linker. Virtualized global variables exist in per-vnet memory set up when the network stack instance is created, and are initialized statically from the reference copy. Run-time access occurs via an accessor macro, which converts from the current vnet and requested symbol to a per-vnet address. When "options VIMAGE" is not compiled into the kernel, normal global ELF symbols will be used instead and indirection is avoided. This change restores static initialization for network stack global variables, restores support for non-global symbols and types, eliminates the need for many subsystem constructors, eliminates large per-subsystem structures that caused many binary compatibility issues both for monitoring applications (netstat) and kernel modules, removes the per-function INIT_VNET_*() macros throughout the stack, eliminates the need for vnet_symmap ksym(2) munging, and eliminates duplicate definitions of virtualized globals under VIMAGE_GLOBALS. Bump __FreeBSD_version and update UPDATING. Portions submitted by: bz Reviewed by: bz, zec Discussed with: gnn, jamie, jeff, jhb, julian, sam Suggested by: peter Approved by: re (kensmith)
2009-07-14 22:48:30 +00:00
VNET_DECLARE(struct flowtable *, ip_ft);
Remove unused VNET_SET() and related macros; only VNET_GET() is ever actually used. Rename VNET_GET() to VNET() to shorten variable references. Discussed with: bz, julian Reviewed by: bz Approved by: re (kensmith, kib)
2009-07-16 21:13:04 +00:00
#define V_ip_ft VNET(ip_ft)
- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
VNET_DECLARE(struct flowtable *, ip6_ft);
#define V_ip6_ft VNET(ip6_ft)
struct flowtable *flowtable_alloc(char *name, int nentry, int flags);
- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
/*
* Given a flow table, look up the L3 and L2 information and
Garbage collect an extern for a non-existent variable. While here let the comment end in a '.' and mark the #endif of _KERNEL. Reviewed by: rwatson (as part of a larger patch)
2009-06-12 20:50:28 +00:00
* return it in the route.
- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
*
*/
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
struct flentry *flowtable_lookup_mbuf(struct flowtable *ft, struct mbuf *m, int af);
struct flentry *flowtable_lookup(struct flowtable *ft, struct sockaddr_storage *ssa,
struct sockaddr_storage *dsa, uint32_t fibnum, int flags);
- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
int kern_flowtable_insert(struct flowtable *ft, struct sockaddr_storage *ssa,
struct sockaddr_storage *dsa, struct route *ro, uint32_t fibnum, int flags);
void flow_invalidate(struct flentry *fl);
The flow-table associates TCP/UDP flows and IP destinations with specific routes. When the routing table changes, for example, when a new route with a more specific prefix is inserted into the routing table, the flow-table is not updated to reflect that change. As such existing connections cannot take advantage of the new path. In some cases the path is broken. This patch will update the affected flow-table entries when a more specific route is added. The route entry is properly marked when a route is deleted from the table. In this case, when the flow-table performs a search, the stale entry is updated automatically. Therefore this patch is not necessary for route deletion. Submitted by: simon, phk Reviewed by: bz, kmacy MFC after: 3 days
2009-10-01 20:32:29 +00:00
void flowtable_route_flush(struct flowtable *ft, struct rtentry *rt);
- restructure flowtable to support ipv6 - add a name argument to flowtable_alloc for printing with ddb commands - extend ddb commands to print destination address or 4-tuples - don't parse ports in ulp header if FL_HASH_ALL is not passed - add kern_flowtable_insert to enable more generic use of flowtable (e.g. system calls for adding entries) - don't hash loopback addresses - cleanup whitespace - keep statistics per-cpu for per-cpu flowtables to avoid cache line contention - add sysctls to accumulate stats and report aggregate MFC after: 7 days
2010-03-12 05:03:26 +00:00
void flow_to_route(struct flentry *fl, struct route *ro);
void flow_to_route_in6(struct flentry *fl, struct route_in6 *ro);
Garbage collect an extern for a non-existent variable. While here let the comment end in a '.' and mark the #endif of _KERNEL. Reviewed by: rwatson (as part of a larger patch)
2009-06-12 20:50:28 +00:00
#endif /* _KERNEL */
- Import infrastructure for caching flows as a means of accelerating L3 and L2 lookups as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
2009-04-19 00:16:04 +00:00
#endif
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