License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2008-01-10 18:49:06 +08:00
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/*
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* ipv6 in net namespaces
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*/
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2008-01-10 18:56:03 +08:00
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#include <net/inet_frag.h>
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2008-01-10 18:49:06 +08:00
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#ifndef __NETNS_IPV6_H__
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#define __NETNS_IPV6_H__
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2009-08-29 09:34:49 +08:00
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#include <net/dst_ops.h>
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2008-01-10 18:49:06 +08:00
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2008-01-10 18:53:43 +08:00
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struct ctl_table_header;
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struct netns_sysctl_ipv6 {
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#ifdef CONFIG_SYSCTL
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2012-04-19 21:37:09 +08:00
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struct ctl_table_header *hdr;
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struct ctl_table_header *route_hdr;
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struct ctl_table_header *icmp_hdr;
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2008-01-22 22:08:36 +08:00
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struct ctl_table_header *frags_hdr;
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2013-02-06 17:46:33 +08:00
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struct ctl_table_header *xfrm6_hdr;
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2008-01-10 18:53:43 +08:00
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#endif
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2008-01-10 18:54:53 +08:00
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int bindv6only;
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2008-01-10 19:01:01 +08:00
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int flush_delay;
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int ip6_rt_max_size;
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int ip6_rt_gc_min_interval;
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int ip6_rt_gc_timeout;
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int ip6_rt_gc_interval;
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int ip6_rt_gc_elasticity;
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int ip6_rt_mtu_expires;
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int ip6_rt_min_advmss;
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2018-03-03 00:32:18 +08:00
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int multipath_hash_policy;
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2014-01-18 00:15:05 +08:00
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int flowlabel_consistency;
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2014-07-02 12:33:10 +08:00
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int auto_flowlabels;
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2008-01-10 19:02:40 +08:00
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int icmpv6_time;
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2018-08-10 23:48:15 +08:00
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int icmpv6_echo_ignore_all;
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2014-01-13 22:59:01 +08:00
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int anycast_src_echo_reply;
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2015-07-09 07:58:22 +08:00
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int ip_nonlocal_bind;
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2014-05-14 01:17:33 +08:00
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int fwmark_reflect;
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2015-03-24 06:36:05 +08:00
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int idgen_retries;
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int idgen_delay;
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ipv6: Flow label state ranges
This patch divides the IPv6 flow label space into two ranges:
0-7ffff is reserved for flow label manager, 80000-fffff will be
used for creating auto flow labels (per RFC6438). This only affects how
labels are set on transmit, it does not affect receive. This range split
can be disbaled by systcl.
Background:
IPv6 flow labels have been an unmitigated disappointment thus far
in the lifetime of IPv6. Support in HW devices to use them for ECMP
is lacking, and OSes don't turn them on by default. If we had these
we could get much better hashing in IPv6 networks without resorting
to DPI, possibly eliminating some of the motivations to to define new
encaps in UDP just for getting ECMP.
Unfortunately, the initial specfications of IPv6 did not clarify
how they are to be used. There has always been a vague concept that
these can be used for ECMP, flow hashing, etc. and we do now have a
good standard how to this in RFC6438. The problem is that flow labels
can be either stateful or stateless (as in RFC6438), and we are
presented with the possibility that a stateless label may collide
with a stateful one. Attempts to split the flow label space were
rejected in IETF. When we added support in Linux for RFC6438, we
could not turn on flow labels by default due to this conflict.
This patch splits the flow label space and should give us
a path to enabling auto flow labels by default for all IPv6 packets.
This is an API change so we need to consider compatibility with
existing deployment. The stateful range is chosen to be the lower
values in hopes that most uses would have chosen small numbers.
Once we resolve the stateless/stateful issue, we can proceed to
look at enabling RFC6438 flow labels by default (starting with
scaled testing).
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-30 06:33:21 +08:00
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int flowlabel_state_ranges;
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2017-08-23 15:55:41 +08:00
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int flowlabel_reflect;
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2017-10-31 05:16:00 +08:00
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int max_dst_opts_cnt;
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int max_hbh_opts_cnt;
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int max_dst_opts_len;
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int max_hbh_opts_len;
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ipv6: sr: Compute flowlabel for outer IPv6 header of seg6 encap mode
ECMP (equal-cost multipath) hashes are typically computed on the packets'
5-tuple(src IP, dst IP, src port, dst port, L4 proto).
For encapsulated packets, the L4 data is not readily available and ECMP
hashing will often revert to (src IP, dst IP). This will lead to traffic
polarization on a single ECMP path, causing congestion and waste of network
capacity.
In IPv6, the 20-bit flow label field is also used as part of the ECMP hash.
In the lack of L4 data, the hashing will be on (src IP, dst IP, flow
label). Having a non-zero flow label is thus important for proper traffic
load balancing when L4 data is unavailable (i.e., when packets are
encapsulated).
Currently, the seg6_do_srh_encap() function extracts the original packet's
flow label and set it as the outer IPv6 flow label. There are two issues
with this behaviour:
a) There is no guarantee that the inner flow label is set by the source.
b) If the original packet is not IPv6, the flow label will be set to
zero (e.g., IPv4 or L2 encap).
This patch adds a function, named seg6_make_flowlabel(), that computes a
flow label from a given skb. It supports IPv6, IPv4 and L2 payloads, and
leverages the per namespace 'seg6_flowlabel" sysctl value.
The currently support behaviours are as follows:
-1 set flowlabel to zero.
0 copy flowlabel from Inner paceket in case of Inner IPv6
(Set flowlabel to 0 in case IPv4/L2)
1 Compute the flowlabel using seg6_make_flowlabel()
This patch has been tested for IPv6, IPv4, and L2 traffic.
Signed-off-by: Ahmed Abdelsalam <amsalam20@gmail.com>
Acked-by: David Lebrun <dlebrun@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-04-25 02:23:16 +08:00
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int seg6_flowlabel;
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2018-10-12 11:17:21 +08:00
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bool skip_notify_on_dev_down;
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2008-01-10 18:53:43 +08:00
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};
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2008-01-10 18:49:06 +08:00
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struct netns_ipv6 {
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2008-01-10 18:53:43 +08:00
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struct netns_sysctl_ipv6 sysctl;
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2008-01-11 09:42:55 +08:00
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struct ipv6_devconf *devconf_all;
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struct ipv6_devconf *devconf_dflt;
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2012-06-08 09:20:41 +08:00
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struct inet_peer_base *peers;
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2008-01-22 22:02:14 +08:00
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struct netns_frags frags;
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2008-01-31 20:04:13 +08:00
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#ifdef CONFIG_NETFILTER
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struct xt_table *ip6table_filter;
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struct xt_table *ip6table_mangle;
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struct xt_table *ip6table_raw;
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2010-01-18 15:08:37 +08:00
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#ifdef CONFIG_SECURITY
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2008-06-10 06:58:05 +08:00
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struct xt_table *ip6table_security;
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2010-01-18 15:08:37 +08:00
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#endif
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2012-08-27 01:14:12 +08:00
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struct xt_table *ip6table_nat;
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2008-03-04 15:25:27 +08:00
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#endif
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2018-04-18 08:33:26 +08:00
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struct fib6_info *fib6_null_entry;
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2018-04-18 08:33:18 +08:00
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struct rt6_info *ip6_null_entry;
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2008-03-04 15:34:17 +08:00
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struct rt6_statistics *rt6_stats;
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2008-07-23 05:33:45 +08:00
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struct timer_list ip6_fib_timer;
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2008-03-04 15:25:27 +08:00
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struct hlist_head *fib_table_hash;
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struct fib6_table *fib6_main_tbl;
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2016-03-08 21:44:35 +08:00
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struct list_head fib6_walkers;
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2009-08-29 09:34:49 +08:00
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struct dst_ops ip6_dst_ops;
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2016-03-08 21:44:35 +08:00
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rwlock_t fib6_walker_lock;
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2016-03-08 21:44:45 +08:00
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spinlock_t fib6_gc_lock;
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2008-03-05 05:49:47 +08:00
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unsigned int ip6_rt_gc_expire;
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unsigned long ip6_rt_last_gc;
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2008-03-04 15:25:27 +08:00
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#ifdef CONFIG_IPV6_MULTIPLE_TABLES
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2018-03-01 11:43:22 +08:00
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unsigned int fib6_rules_require_fldissect;
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bool fib6_has_custom_rules;
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2008-03-05 05:48:30 +08:00
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struct rt6_info *ip6_prohibit_entry;
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struct rt6_info *ip6_blk_hole_entry;
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2008-03-04 15:25:27 +08:00
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struct fib6_table *fib6_local_tbl;
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2008-03-04 15:33:08 +08:00
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struct fib_rules_ops *fib6_rules_ops;
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2008-01-31 20:04:13 +08:00
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#endif
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2019-02-23 15:28:28 +08:00
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struct sock * __percpu *icmp_sk;
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2008-03-08 03:15:34 +08:00
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struct sock *ndisc_sk;
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2008-03-08 03:16:02 +08:00
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struct sock *tcp_sk;
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2008-03-08 03:16:55 +08:00
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struct sock *igmp_sk;
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2015-02-26 01:58:35 +08:00
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struct sock *mc_autojoin_sk;
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2008-12-11 08:07:08 +08:00
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#ifdef CONFIG_IPV6_MROUTE
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ipv6: ip6mr: support multiple tables
This patch adds support for multiple independant multicast routing instances,
named "tables".
Userspace multicast routing daemons can bind to a specific table instance by
issuing a setsockopt call using a new option MRT6_TABLE. The table number is
stored in the raw socket data and affects all following ip6mr setsockopt(),
getsockopt() and ioctl() calls. By default, a single table (RT6_TABLE_DFLT)
is created with a default routing rule pointing to it. Newly created pim6reg
devices have the table number appended ("pim6regX"), with the exception of
devices created in the default table, which are named just "pim6reg" for
compatibility reasons.
Packets are directed to a specific table instance using routing rules,
similar to how regular routing rules work. Currently iif, oif and mark
are supported as keys, source and destination addresses could be supported
additionally.
Example usage:
- bind pimd/xorp/... to a specific table:
uint32_t table = 123;
setsockopt(fd, SOL_IPV6, MRT6_TABLE, &table, sizeof(table));
- create routing rules directing packets to the new table:
# ip -6 mrule add iif eth0 lookup 123
# ip -6 mrule add oif eth0 lookup 123
Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-05-11 20:40:55 +08:00
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#ifndef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
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2018-03-01 05:29:32 +08:00
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struct mr_table *mrt6;
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ipv6: ip6mr: support multiple tables
This patch adds support for multiple independant multicast routing instances,
named "tables".
Userspace multicast routing daemons can bind to a specific table instance by
issuing a setsockopt call using a new option MRT6_TABLE. The table number is
stored in the raw socket data and affects all following ip6mr setsockopt(),
getsockopt() and ioctl() calls. By default, a single table (RT6_TABLE_DFLT)
is created with a default routing rule pointing to it. Newly created pim6reg
devices have the table number appended ("pim6regX"), with the exception of
devices created in the default table, which are named just "pim6reg" for
compatibility reasons.
Packets are directed to a specific table instance using routing rules,
similar to how regular routing rules work. Currently iif, oif and mark
are supported as keys, source and destination addresses could be supported
additionally.
Example usage:
- bind pimd/xorp/... to a specific table:
uint32_t table = 123;
setsockopt(fd, SOL_IPV6, MRT6_TABLE, &table, sizeof(table));
- create routing rules directing packets to the new table:
# ip -6 mrule add iif eth0 lookup 123
# ip -6 mrule add oif eth0 lookup 123
Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-05-11 20:40:55 +08:00
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#else
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struct list_head mr6_tables;
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struct fib_rules_ops *mr6_rules_ops;
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#endif
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2008-12-11 08:07:08 +08:00
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#endif
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2013-03-22 14:28:43 +08:00
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atomic_t dev_addr_genid;
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2014-10-07 01:58:37 +08:00
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atomic_t fib6_sernum;
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2016-11-08 21:57:40 +08:00
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struct seg6_pernet_data *seg6_data;
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2017-08-03 19:28:16 +08:00
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struct fib_notifier_ops *notifier_ops;
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2018-03-26 20:01:34 +08:00
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struct fib_notifier_ops *ip6mr_notifier_ops;
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unsigned int ipmr_seq; /* protected by rtnl_mutex */
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2017-09-20 07:27:06 +08:00
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struct {
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struct hlist_head head;
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spinlock_t lock;
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u32 seq;
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} ip6addrlbl_table;
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2008-01-10 18:49:06 +08:00
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};
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2012-09-19 00:50:08 +08:00
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#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
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struct netns_nf_frag {
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struct netns_frags frags;
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};
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#endif
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2008-01-10 18:49:06 +08:00
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#endif
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