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* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner2019-05-301-6/+1
| | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* ila: Flush netlink command to clear xlat tableTom Herbert2018-06-291-0/+1
| | | | | | | Add ILA_CMD_FLUSH netlink command to clear the ILA translation table. Signed-off-by: Tom Herbert <tom@quantonium.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* ila: Create main ila source fileTom Herbert2018-06-291-2/+24
| | | | | | | | | Create a main ila file that contains the module initialization functions as well as netlink definitions. Previously these were defined in ila_xlat and ila_common. This approach allows better extensibility. Signed-off-by: Tom Herbert <tom@quantonium.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* ila: allow configuration of identifier typeTom Herbert2017-11-081-11/+1
| | | | | | | | | | | | | Allow identifier to be explicitly configured for a mapping. This can either be one of the identifier types specified in the ILA draft or a value of ILA_ATYPE_USE_FORMAT which means the identifier type is inferred from the identifier type field. If a value other than ILA_ATYPE_USE_FORMAT is set for a mapping then it is assumed that the identifier type field is not present in an identifier. Signed-off-by: Tom Herbert <tom@quantonium.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* ila: Perform only one translation in forwarding pathTom Herbert2016-06-081-1/+2
| | | | | | | | | | | | | | | | | | | | When setting up ILA in a router we noticed that the the encapsulation is invoked twice: once in the route input path and again upon route output. To resolve this we add a flag set_csum_neutral for the ila_update_ipv6_locator. If this flag is set and the checksum neutral bit is also set we assume that checksum-neutral translation has already been performed and take no further action. The flag is set only in ila_output path. The flag is not set for ila_input and ila_xlat. Tested: Used 3 netns to set to emulate a router and two hosts. The router translates SIR addresses between the two destinations in other two netns. Verified ping and netperf are functional. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ila: add checksum neutral ILA translationsTom Herbert2016-04-261-2/+14
| | | | | | | | | | | | | | | | | | | | | | Support checksum neutral ILA as described in the ILA draft. The low order 16 bits of the identifier are used to contain the checksum adjustment value. The csum-mode parameter is added to described checksum processing. There are three values: - adjust transport checksum (previous behavior) - do checksum neutral mapping - do nothing On output the csum-mode in the ila_params is checked and acted on. If mode is checksum neutral mapping then to mapping and set C-bit. On input, C-bit is checked. If it is set checksum-netural mapping is done (regardless of csum-mode in ila params) and C-bit will be cleared. If it is not set then action in csum-mode is taken. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ila: Add struct definitions and helpersTom Herbert2016-04-261-3/+64
| | | | | | | | | | | | | | | Add structures for identifiers, locators, and an ila address which is composed of a locator and identifier and in6_addr can be cast to it. This includes a three bit type field and enums for the types defined in ILA I-D. In ILA lwt don't allow user to set a translation for a non-ILA address (type of identifier is zero meaning it is an IID). This also requires that the destination prefix is at least 65 bytes (64 bit locator and first byte of identifier). Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ila: Add generic ILA translation facilityTom Herbert2015-12-151-0/+2
| | | | | | | | | | | | | | | This patch implements an ILA tanslation table. This table can be configured with identifier to locator mappings, and can be be queried to resolve a mapping. Queries can be parameterized based on interface, direction (incoming or outoing), and matching locator. The table is implemented using rhashtable and is configured via netlink (through "ip ila .." in iproute). The table may be used as alternative means to do do ILA tanslations other than the lw tunnels Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ila: Create net/ipv6/ila directoryTom Herbert2015-12-151-0/+46
Create ila directory in preparation for supporting other hooks in the kernel than LWT for doing ILA. This includes: - Moving ila.c to ila/ila_lwt.c - Splitting out some common functions into ila_common.c Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>