2016-08-20 02:55:44 +08:00
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#!/bin/bash
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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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2016-08-20 02:55:44 +08:00
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# In Namespace 0 (at_ns0) using native tunnel
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# Overlay IP: 10.1.1.100
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# local 192.16.1.100 remote 192.16.1.200
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# veth0 IP: 172.16.1.100, tunnel dev <type>00
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# Out of Namespace using BPF set/get on lwtunnel
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# Overlay IP: 10.1.1.200
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# local 172.16.1.200 remote 172.16.1.100
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# veth1 IP: 172.16.1.200, tunnel dev <type>11
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function config_device {
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ip netns add at_ns0
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ip link add veth0 type veth peer name veth1
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ip link set veth0 netns at_ns0
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ip netns exec at_ns0 ip addr add 172.16.1.100/24 dev veth0
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ip netns exec at_ns0 ip link set dev veth0 up
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2016-09-16 04:00:31 +08:00
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ip link set dev veth1 up mtu 1500
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2016-08-20 02:55:44 +08:00
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ip addr add dev veth1 172.16.1.200/24
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}
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function add_gre_tunnel {
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# in namespace
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ip netns exec at_ns0 \
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ip link add dev $DEV_NS type $TYPE key 2 local 172.16.1.100 remote 172.16.1.200
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ip netns exec at_ns0 ip link set dev $DEV_NS up
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ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
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# out of namespace
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ip link add dev $DEV type $TYPE key 2 external
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ip link set dev $DEV up
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ip addr add dev $DEV 10.1.1.200/24
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}
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2017-08-26 00:21:29 +08:00
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function add_erspan_tunnel {
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# in namespace
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ip netns exec at_ns0 \
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ip link add dev $DEV_NS type $TYPE seq key 2 local 172.16.1.100 remote 172.16.1.200 erspan 123
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ip netns exec at_ns0 ip link set dev $DEV_NS up
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ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
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# out of namespace
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ip link add dev $DEV type $TYPE external
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ip link set dev $DEV up
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ip addr add dev $DEV 10.1.1.200/24
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}
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2016-08-20 02:55:44 +08:00
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function add_vxlan_tunnel {
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# Set static ARP entry here because iptables set-mark works
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# on L3 packet, as a result not applying to ARP packets,
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# causing errors at get_tunnel_{key/opt}.
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# in namespace
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ip netns exec at_ns0 \
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ip link add dev $DEV_NS type $TYPE id 2 dstport 4789 gbp remote 172.16.1.200
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ip netns exec at_ns0 ip link set dev $DEV_NS address 52:54:00:d9:01:00 up
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ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
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ip netns exec at_ns0 arp -s 10.1.1.200 52:54:00:d9:02:00
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ip netns exec at_ns0 iptables -A OUTPUT -j MARK --set-mark 0x800FF
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# out of namespace
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ip link add dev $DEV type $TYPE external gbp dstport 4789
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ip link set dev $DEV address 52:54:00:d9:02:00 up
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ip addr add dev $DEV 10.1.1.200/24
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arp -s 10.1.1.100 52:54:00:d9:01:00
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}
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function add_geneve_tunnel {
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# in namespace
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ip netns exec at_ns0 \
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ip link add dev $DEV_NS type $TYPE id 2 dstport 6081 remote 172.16.1.200
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ip netns exec at_ns0 ip link set dev $DEV_NS up
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ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
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# out of namespace
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ip link add dev $DEV type $TYPE dstport 6081 external
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ip link set dev $DEV up
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ip addr add dev $DEV 10.1.1.200/24
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}
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2016-09-16 04:00:31 +08:00
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function add_ipip_tunnel {
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# in namespace
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ip netns exec at_ns0 \
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ip link add dev $DEV_NS type $TYPE local 172.16.1.100 remote 172.16.1.200
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ip netns exec at_ns0 ip link set dev $DEV_NS up
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ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
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# out of namespace
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ip link add dev $DEV type $TYPE external
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ip link set dev $DEV up
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ip addr add dev $DEV 10.1.1.200/24
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}
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2016-08-20 02:55:44 +08:00
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function attach_bpf {
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DEV=$1
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SET_TUNNEL=$2
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GET_TUNNEL=$3
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tc qdisc add dev $DEV clsact
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tc filter add dev $DEV egress bpf da obj tcbpf2_kern.o sec $SET_TUNNEL
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tc filter add dev $DEV ingress bpf da obj tcbpf2_kern.o sec $GET_TUNNEL
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}
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function test_gre {
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TYPE=gretap
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DEV_NS=gretap00
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DEV=gretap11
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config_device
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add_gre_tunnel
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attach_bpf $DEV gre_set_tunnel gre_get_tunnel
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ping -c 1 10.1.1.100
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ip netns exec at_ns0 ping -c 1 10.1.1.200
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2016-09-16 04:00:31 +08:00
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cleanup
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2016-08-20 02:55:44 +08:00
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}
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2017-08-26 00:21:29 +08:00
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function test_erspan {
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TYPE=erspan
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DEV_NS=erspan00
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DEV=erspan11
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config_device
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add_erspan_tunnel
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attach_bpf $DEV erspan_set_tunnel erspan_get_tunnel
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ping -c 1 10.1.1.100
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ip netns exec at_ns0 ping -c 1 10.1.1.200
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cleanup
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}
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2016-08-20 02:55:44 +08:00
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function test_vxlan {
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TYPE=vxlan
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DEV_NS=vxlan00
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DEV=vxlan11
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config_device
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add_vxlan_tunnel
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attach_bpf $DEV vxlan_set_tunnel vxlan_get_tunnel
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ping -c 1 10.1.1.100
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ip netns exec at_ns0 ping -c 1 10.1.1.200
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2016-09-16 04:00:31 +08:00
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cleanup
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2016-08-20 02:55:44 +08:00
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}
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function test_geneve {
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TYPE=geneve
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DEV_NS=geneve00
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DEV=geneve11
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config_device
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add_geneve_tunnel
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attach_bpf $DEV geneve_set_tunnel geneve_get_tunnel
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ping -c 1 10.1.1.100
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ip netns exec at_ns0 ping -c 1 10.1.1.200
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2016-09-16 04:00:31 +08:00
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cleanup
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}
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function test_ipip {
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TYPE=ipip
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DEV_NS=ipip00
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DEV=ipip11
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config_device
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tcpdump -nei veth1 &
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cat /sys/kernel/debug/tracing/trace_pipe &
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add_ipip_tunnel
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ethtool -K veth1 gso off gro off rx off tx off
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ip link set dev veth1 mtu 1500
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attach_bpf $DEV ipip_set_tunnel ipip_get_tunnel
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ping -c 1 10.1.1.100
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ip netns exec at_ns0 ping -c 1 10.1.1.200
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ip netns exec at_ns0 iperf -sD -p 5200 > /dev/null
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sleep 0.2
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iperf -c 10.1.1.100 -n 5k -p 5200
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cleanup
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2016-08-20 02:55:44 +08:00
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}
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function cleanup {
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2016-09-16 04:00:31 +08:00
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set +ex
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pkill iperf
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2016-08-20 02:55:44 +08:00
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ip netns delete at_ns0
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ip link del veth1
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2016-09-16 04:00:31 +08:00
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ip link del ipip11
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ip link del gretap11
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2017-08-01 05:40:50 +08:00
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ip link del vxlan11
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2016-09-16 04:00:31 +08:00
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ip link del geneve11
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2017-08-26 00:21:29 +08:00
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ip link del erspan11
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2016-09-16 04:00:31 +08:00
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pkill tcpdump
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pkill cat
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set -ex
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2016-08-20 02:55:44 +08:00
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}
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2017-08-26 00:21:29 +08:00
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trap cleanup 0 2 3 6 9
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2016-09-16 04:00:31 +08:00
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cleanup
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2016-08-20 02:55:44 +08:00
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echo "Testing GRE tunnel..."
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test_gre
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2017-08-26 00:21:29 +08:00
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echo "Testing ERSPAN tunnel..."
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test_erspan
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2016-08-20 02:55:44 +08:00
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echo "Testing VXLAN tunnel..."
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test_vxlan
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echo "Testing GENEVE tunnel..."
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test_geneve
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2016-09-16 04:00:31 +08:00
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echo "Testing IPIP tunnel..."
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test_ipip
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echo "*** PASS ***"
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