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 15:07:57 +01:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2008-07-31 20:45:24 -07:00
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2005-04-16 15:20:36 -07:00
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2005-04-16 15:20:36 -07:00
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2008-07-31 20:45:24 -07:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2017-03-16 10:03:34 +02:00
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2005-04-16 15:20:36 -07:00
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2005-12-27 02:43:12 -02:00
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2011-11-23 20:12:59 -05:00
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2005-04-16 15:20:36 -07:00
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2005-12-27 02:43:12 -02:00
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2008-09-02 15:55:33 +02:00
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2008-10-01 07:33:10 -07:00
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2008-09-02 15:55:33 +02:00
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2011-11-21 03:39:03 +00:00
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2012-10-22 21:22:45 +02:00
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ipvs: Fix faulty IPv6 extension header handling in IPVS
IPv6 packets can contain extension headers, thus its wrong to assume
that the transport/upper-layer header, starts right after (struct
ipv6hdr) the IPv6 header. IPVS uses this false assumption, and will
write SNAT & DNAT modifications at a fixed pos which will corrupt the
message.
To fix this, proper header position must be found before modifying
packets. Introducing ip_vs_fill_iph_skb(), which uses ipv6_find_hdr()
to skip the exthdrs. It finds (1) the transport header offset, (2) the
protocol, and (3) detects if the packet is a fragment.
Note, that fragments in IPv6 is represented via an exthdr. Thus, this
is detected while skipping through the exthdrs.
This patch depends on commit 84018f55a:
"netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()"
This also adds a dependency to ip6_tables.
Originally based on patch from: Hans Schillstrom
kABI notes:
Changing struct ip_vs_iphdr is a potential minor kABI breaker,
because external modules can be compiled with another version of
this struct. This should not matter, as they would most-likely
be using a compiled-in version of ip_vs_fill_iphdr(). When
recompiled, they will notice ip_vs_fill_iphdr() no longer exists,
and they have to used ip_vs_fill_iph_skb() instead.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:06:41 +02:00
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2012-09-26 14:06:20 +02:00
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2010-09-21 17:35:41 +02:00
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2011-01-03 14:44:42 +01:00
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2015-08-26 09:40:29 -07:00
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2014-09-30 10:50:06 +09:00
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2011-01-03 14:44:42 +01:00
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2014-09-30 10:50:06 +09:00
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IPVS: Allow boot time change of hash size
I was very frustrated about the fact that I have to recompile the kernel
to change the hash size. So, I created this patch.
If IPVS is built-in you can append ip_vs.conn_tab_bits=?? to kernel
command line, or, if you built IPVS as modules, you can add
options ip_vs conn_tab_bits=??.
To keep everything backward compatible, you still can select the size at
compile time, and that will be used as default.
It has been about a year since this patch was originally posted
and subsequently dropped on the basis of insufficient test data.
Mark Bergsma has provided the following test results which seem
to strongly support the need for larger hash table sizes:
We do however run into the same problem with the default setting (212 =
4096 entries), as most of our LVS balancers handle around a million
connections/SLAB entries at any point in time (around 100-150 kpps
load). With only 4096 hash table entries this implies that each entry
consists of a linked list of 256 connections *on average*.
To provide some statistics, I did an oprofile run on an 2.6.31 kernel,
with both the default 4096 table size, and the same kernel recompiled
with IP_VS_CONN_TAB_BITS set to 18 (218 = 262144 entries). I built a
quick test setup with a part of Wikimedia/Wikipedia's live traffic
mirrored by the switch to the test host.
With the default setting, at ~ 120 kpps packet load we saw a typical %si
CPU usage of around 30-35%, and oprofile reported a hot spot in
ip_vs_conn_in_get:
samples % image name app name
symbol name
1719761 42.3741 ip_vs.ko ip_vs.ko ip_vs_conn_in_get
302577 7.4554 bnx2 bnx2 /bnx2
181984 4.4840 vmlinux vmlinux __ticket_spin_lock
128636 3.1695 vmlinux vmlinux ip_route_input
74345 1.8318 ip_vs.ko ip_vs.ko ip_vs_conn_out_get
68482 1.6874 vmlinux vmlinux mwait_idle
After loading the recompiled kernel with 218 entries, %si CPU usage
dropped in half to around 12-18%, and oprofile looks much healthier,
with only 7% spent in ip_vs_conn_in_get:
samples % image name app name
symbol name
265641 14.4616 bnx2 bnx2 /bnx2
143251 7.7986 vmlinux vmlinux __ticket_spin_lock
140661 7.6576 ip_vs.ko ip_vs.ko ip_vs_conn_in_get
94364 5.1372 vmlinux vmlinux mwait_idle
86267 4.6964 vmlinux vmlinux ip_route_input
[ horms@verge.net.au: trivial up-port and minor style fixes ]
Signed-off-by: Catalin(ux) M. BOIE <catab@embedromix.ro>
Cc: Mark Bergsma <mark@wikimedia.org>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-01-05 05:50:24 +01:00
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2008-09-02 15:55:34 +02:00
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2015-08-26 09:40:29 -07:00
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2015-08-26 09:40:28 -07:00
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ipvs: Fix faulty IPv6 extension header handling in IPVS
IPv6 packets can contain extension headers, thus its wrong to assume
that the transport/upper-layer header, starts right after (struct
ipv6hdr) the IPv6 header. IPVS uses this false assumption, and will
write SNAT & DNAT modifications at a fixed pos which will corrupt the
message.
To fix this, proper header position must be found before modifying
packets. Introducing ip_vs_fill_iph_skb(), which uses ipv6_find_hdr()
to skip the exthdrs. It finds (1) the transport header offset, (2) the
protocol, and (3) detects if the packet is a fragment.
Note, that fragments in IPv6 is represented via an exthdr. Thus, this
is detected while skipping through the exthdrs.
This patch depends on commit 84018f55a:
"netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()"
This also adds a dependency to ip6_tables.
Originally based on patch from: Hans Schillstrom
kABI notes:
Changing struct ip_vs_iphdr is a potential minor kABI breaker,
because external modules can be compiled with another version of
this struct. This should not matter, as they would most-likely
be using a compiled-in version of ip_vs_fill_iphdr(). When
recompiled, they will notice ip_vs_fill_iphdr() no longer exists,
and they have to used ip_vs_fill_iph_skb() instead.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:06:41 +02:00
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2014-09-30 10:50:06 +09:00
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ipvs: Fix faulty IPv6 extension header handling in IPVS
IPv6 packets can contain extension headers, thus its wrong to assume
that the transport/upper-layer header, starts right after (struct
ipv6hdr) the IPv6 header. IPVS uses this false assumption, and will
write SNAT & DNAT modifications at a fixed pos which will corrupt the
message.
To fix this, proper header position must be found before modifying
packets. Introducing ip_vs_fill_iph_skb(), which uses ipv6_find_hdr()
to skip the exthdrs. It finds (1) the transport header offset, (2) the
protocol, and (3) detects if the packet is a fragment.
Note, that fragments in IPv6 is represented via an exthdr. Thus, this
is detected while skipping through the exthdrs.
This patch depends on commit 84018f55a:
"netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()"
This also adds a dependency to ip6_tables.
Originally based on patch from: Hans Schillstrom
kABI notes:
Changing struct ip_vs_iphdr is a potential minor kABI breaker,
because external modules can be compiled with another version of
this struct. This should not matter, as they would most-likely
be using a compiled-in version of ip_vs_fill_iphdr(). When
recompiled, they will notice ip_vs_fill_iphdr() no longer exists,
and they have to used ip_vs_fill_iph_skb() instead.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:06:41 +02:00
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2008-09-02 15:55:34 +02:00
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2012-09-26 14:06:59 +02:00
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2017-11-13 22:58:18 +08:00
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2012-09-26 14:06:59 +02:00
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ipvs: Fix faulty IPv6 extension header handling in IPVS
IPv6 packets can contain extension headers, thus its wrong to assume
that the transport/upper-layer header, starts right after (struct
ipv6hdr) the IPv6 header. IPVS uses this false assumption, and will
write SNAT & DNAT modifications at a fixed pos which will corrupt the
message.
To fix this, proper header position must be found before modifying
packets. Introducing ip_vs_fill_iph_skb(), which uses ipv6_find_hdr()
to skip the exthdrs. It finds (1) the transport header offset, (2) the
protocol, and (3) detects if the packet is a fragment.
Note, that fragments in IPv6 is represented via an exthdr. Thus, this
is detected while skipping through the exthdrs.
This patch depends on commit 84018f55a:
"netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()"
This also adds a dependency to ip6_tables.
Originally based on patch from: Hans Schillstrom
kABI notes:
Changing struct ip_vs_iphdr is a potential minor kABI breaker,
because external modules can be compiled with another version of
this struct. This should not matter, as they would most-likely
be using a compiled-in version of ip_vs_fill_iphdr(). When
recompiled, they will notice ip_vs_fill_iphdr() no longer exists,
and they have to used ip_vs_fill_iph_skb() instead.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:06:41 +02:00
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2015-08-26 09:40:28 -07:00
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2015-08-26 09:40:29 -07:00
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2008-09-02 15:55:34 +02:00
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2015-08-26 09:40:29 -07:00
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2015-08-26 09:40:28 -07:00
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2015-08-26 09:40:29 -07:00
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2008-09-02 15:55:34 +02:00
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2015-08-26 09:40:28 -07:00
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2011-11-21 03:39:03 +00:00
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2013-11-06 17:52:20 +01:00
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2015-08-26 09:40:28 -07:00
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ipvs: Fix faulty IPv6 extension header handling in IPVS
IPv6 packets can contain extension headers, thus its wrong to assume
that the transport/upper-layer header, starts right after (struct
ipv6hdr) the IPv6 header. IPVS uses this false assumption, and will
write SNAT & DNAT modifications at a fixed pos which will corrupt the
message.
To fix this, proper header position must be found before modifying
packets. Introducing ip_vs_fill_iph_skb(), which uses ipv6_find_hdr()
to skip the exthdrs. It finds (1) the transport header offset, (2) the
protocol, and (3) detects if the packet is a fragment.
Note, that fragments in IPv6 is represented via an exthdr. Thus, this
is detected while skipping through the exthdrs.
This patch depends on commit 84018f55a:
"netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()"
This also adds a dependency to ip6_tables.
Originally based on patch from: Hans Schillstrom
kABI notes:
Changing struct ip_vs_iphdr is a potential minor kABI breaker,
because external modules can be compiled with another version of
this struct. This should not matter, as they would most-likely
be using a compiled-in version of ip_vs_fill_iphdr(). When
recompiled, they will notice ip_vs_fill_iphdr() no longer exists,
and they have to used ip_vs_fill_iph_skb() instead.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:06:41 +02:00
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2015-08-26 09:40:28 -07:00
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2008-09-02 15:55:34 +02:00
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2015-08-26 09:40:28 -07:00
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ipvs: Fix faulty IPv6 extension header handling in IPVS
IPv6 packets can contain extension headers, thus its wrong to assume
that the transport/upper-layer header, starts right after (struct
ipv6hdr) the IPv6 header. IPVS uses this false assumption, and will
write SNAT & DNAT modifications at a fixed pos which will corrupt the
message.
To fix this, proper header position must be found before modifying
packets. Introducing ip_vs_fill_iph_skb(), which uses ipv6_find_hdr()
to skip the exthdrs. It finds (1) the transport header offset, (2) the
protocol, and (3) detects if the packet is a fragment.
Note, that fragments in IPv6 is represented via an exthdr. Thus, this
is detected while skipping through the exthdrs.
This patch depends on commit 84018f55a:
"netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()"
This also adds a dependency to ip6_tables.
Originally based on patch from: Hans Schillstrom
kABI notes:
Changing struct ip_vs_iphdr is a potential minor kABI breaker,
because external modules can be compiled with another version of
this struct. This should not matter, as they would most-likely
be using a compiled-in version of ip_vs_fill_iphdr(). When
recompiled, they will notice ip_vs_fill_iphdr() no longer exists,
and they have to used ip_vs_fill_iph_skb() instead.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:06:41 +02:00
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2015-08-26 09:40:28 -07:00
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2015-08-26 09:40:29 -07:00
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2015-08-26 09:40:28 -07:00
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2015-08-26 09:40:29 -07:00
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ipvs: Fix faulty IPv6 extension header handling in IPVS
IPv6 packets can contain extension headers, thus its wrong to assume
that the transport/upper-layer header, starts right after (struct
ipv6hdr) the IPv6 header. IPVS uses this false assumption, and will
write SNAT & DNAT modifications at a fixed pos which will corrupt the
message.
To fix this, proper header position must be found before modifying
packets. Introducing ip_vs_fill_iph_skb(), which uses ipv6_find_hdr()
to skip the exthdrs. It finds (1) the transport header offset, (2) the
protocol, and (3) detects if the packet is a fragment.
Note, that fragments in IPv6 is represented via an exthdr. Thus, this
is detected while skipping through the exthdrs.
This patch depends on commit 84018f55a:
"netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()"
This also adds a dependency to ip6_tables.
Originally based on patch from: Hans Schillstrom
kABI notes:
Changing struct ip_vs_iphdr is a potential minor kABI breaker,
because external modules can be compiled with another version of
this struct. This should not matter, as they would most-likely
be using a compiled-in version of ip_vs_fill_iphdr(). When
recompiled, they will notice ip_vs_fill_iphdr() no longer exists,
and they have to used ip_vs_fill_iph_skb() instead.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:06:41 +02:00
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2008-09-02 15:55:34 +02:00
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2011-11-21 03:39:03 +00:00
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2008-09-02 15:55:34 +02:00
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2013-03-21 11:58:12 +02:00
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2008-09-02 15:55:34 +02:00
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2005-04-16 15:20:36 -07:00
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2005-12-27 02:43:12 -02:00
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2013-09-21 10:22:42 -07:00
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2008-09-02 15:55:35 +02:00
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2012-09-26 14:05:53 +02:00
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2008-10-28 16:09:23 -07:00
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2008-09-02 15:55:35 +02:00
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2008-10-31 00:56:49 -07:00
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2008-09-02 15:55:35 +02:00
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2009-07-30 14:29:44 -07:00
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2008-09-02 15:55:35 +02:00
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2009-07-30 14:29:44 -07:00
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2008-09-02 15:55:35 +02:00
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2009-07-30 14:29:44 -07:00
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2010-10-17 16:46:17 +03:00
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2009-07-30 14:29:44 -07:00
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2010-10-17 16:46:17 +03:00
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2009-07-30 14:29:44 -07:00
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2010-10-17 16:46:17 +03:00
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2009-07-30 14:29:44 -07:00
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2010-10-17 16:46:17 +03:00
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2009-07-30 14:29:44 -07:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:35 +02:00
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2005-04-16 15:20:36 -07:00
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2010-10-17 16:46:17 +03:00
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2005-04-16 15:20:36 -07:00
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2009-08-02 11:05:41 +00:00
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2009-07-30 14:29:44 -07:00
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2009-08-02 11:05:41 +00:00
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2009-07-30 14:29:44 -07:00
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2005-04-16 15:20:36 -07:00
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2009-07-30 14:29:44 -07:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2009-02-14 22:58:35 -08:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2010-02-18 12:31:05 +01:00
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2013-06-18 10:08:07 +03:00
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2010-02-18 12:31:05 +01:00
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2013-06-18 10:08:07 +03:00
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2010-02-18 12:31:05 +01:00
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2018-07-06 08:25:53 +03:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2011-01-03 14:44:56 +01:00
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2015-02-06 09:44:44 +02:00
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2011-01-03 14:44:56 +01:00
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2014-09-30 10:50:06 +09:00
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2011-01-03 14:44:56 +01:00
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2015-02-06 09:44:44 +02:00
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2011-01-03 14:44:56 +01:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2008-08-10 18:24:41 +00:00
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2015-02-06 09:44:44 +02:00
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2008-08-10 18:24:41 +00:00
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2015-02-06 09:44:44 +02:00
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2008-08-10 18:24:41 +00:00
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2009-11-03 03:26:03 +00:00
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2015-02-06 09:44:44 +02:00
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2008-09-08 13:39:04 +02:00
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2013-03-09 23:25:08 +02:00
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2011-01-03 14:44:56 +01:00
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2015-02-06 09:44:44 +02:00
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2005-04-16 15:20:36 -07:00
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2005-12-27 02:43:12 -02:00
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2005-04-16 15:20:36 -07:00
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2005-12-27 02:43:12 -02:00
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2011-01-03 14:44:46 +01:00
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2005-04-16 15:20:36 -07:00
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2008-04-29 03:21:23 -07:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:36 -05:00
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2011-01-03 14:44:46 +01:00
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2015-09-21 13:02:36 -05:00
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2011-01-03 14:44:46 +01:00
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2015-09-21 13:02:43 -05:00
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2011-01-03 14:44:51 +01:00
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ipvs: API change to avoid rescan of IPv6 exthdr
Reduce the number of times we scan/skip the IPv6 exthdrs.
This patch contains a lot of API changes. This is done, to avoid
repeating the scan of finding the IPv6 headers, via ipv6_find_hdr(),
which is called by ip_vs_fill_iph_skb().
Finding the IPv6 headers is done as early as possible, and passed on
as a pointer "struct ip_vs_iphdr *" to the affected functions.
This patch reduce/removes 19 calls to ip_vs_fill_iph_skb().
Notice, I have choosen, not to change the API of function
pointer "(*schedule)" (in struct ip_vs_scheduler) as it can be
used by external schedulers, via {un,}register_ip_vs_scheduler.
Only 4 out of 10 schedulers use info from ip_vs_iphdr*, and when
they do, they are only interested in iph->{s,d}addr.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:07:17 +02:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:38 -05:00
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2008-09-02 15:55:40 +02:00
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2015-08-26 09:40:32 -07:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:39 -05:00
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2008-09-02 15:55:40 +02:00
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2015-08-26 09:40:32 -07:00
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2005-04-16 15:20:36 -07:00
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ipvs: API change to avoid rescan of IPv6 exthdr
Reduce the number of times we scan/skip the IPv6 exthdrs.
This patch contains a lot of API changes. This is done, to avoid
repeating the scan of finding the IPv6 headers, via ipv6_find_hdr(),
which is called by ip_vs_fill_iph_skb().
Finding the IPv6 headers is done as early as possible, and passed on
as a pointer "struct ip_vs_iphdr *" to the affected functions.
This patch reduce/removes 19 calls to ip_vs_fill_iph_skb().
Notice, I have choosen, not to change the API of function
pointer "(*schedule)" (in struct ip_vs_scheduler) as it can be
used by external schedulers, via {un,}register_ip_vs_scheduler.
Only 4 out of 10 schedulers use info from ip_vs_iphdr*, and when
they do, they are only interested in iph->{s,d}addr.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:07:17 +02:00
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2005-04-16 15:20:36 -07:00
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|
ipvs: API change to avoid rescan of IPv6 exthdr
Reduce the number of times we scan/skip the IPv6 exthdrs.
This patch contains a lot of API changes. This is done, to avoid
repeating the scan of finding the IPv6 headers, via ipv6_find_hdr(),
which is called by ip_vs_fill_iph_skb().
Finding the IPv6 headers is done as early as possible, and passed on
as a pointer "struct ip_vs_iphdr *" to the affected functions.
This patch reduce/removes 19 calls to ip_vs_fill_iph_skb().
Notice, I have choosen, not to change the API of function
pointer "(*schedule)" (in struct ip_vs_scheduler) as it can be
used by external schedulers, via {un,}register_ip_vs_scheduler.
Only 4 out of 10 schedulers use info from ip_vs_iphdr*, and when
they do, they are only interested in iph->{s,d}addr.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:07:17 +02:00
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2005-04-16 15:20:36 -07:00
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2011-09-16 14:11:49 +09:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:29 -05:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:29 -05:00
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2005-04-16 15:20:36 -07:00
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2010-10-17 16:46:17 +03:00
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2005-04-16 15:20:36 -07:00
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2011-01-03 14:44:51 +01:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2011-01-03 14:44:46 +01:00
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2013-09-21 10:22:42 -07:00
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2015-09-21 13:02:01 -05:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2010-08-22 21:37:52 +09:00
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2015-09-21 13:01:42 -05:00
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2010-08-22 21:37:52 +09:00
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2010-08-22 21:37:53 +09:00
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2010-08-22 21:37:52 +09:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2011-02-19 18:05:08 +08:00
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2005-04-16 15:20:36 -07:00
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2011-01-03 14:44:57 +01:00
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2013-03-21 11:58:11 +02:00
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2011-01-03 14:44:57 +01:00
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2005-04-16 15:20:36 -07:00
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2014-09-09 16:40:23 -07:00
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2015-09-21 13:01:41 -05:00
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2005-04-16 15:20:36 -07:00
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2017-03-16 10:03:34 +02:00
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2005-04-16 15:20:36 -07:00
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2007-11-07 02:36:55 -08:00
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2013-03-21 11:58:11 +02:00
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2012-04-24 23:46:40 +03:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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|
ipvs: API change to avoid rescan of IPv6 exthdr
Reduce the number of times we scan/skip the IPv6 exthdrs.
This patch contains a lot of API changes. This is done, to avoid
repeating the scan of finding the IPv6 headers, via ipv6_find_hdr(),
which is called by ip_vs_fill_iph_skb().
Finding the IPv6 headers is done as early as possible, and passed on
as a pointer "struct ip_vs_iphdr *" to the affected functions.
This patch reduce/removes 19 calls to ip_vs_fill_iph_skb().
Notice, I have choosen, not to change the API of function
pointer "(*schedule)" (in struct ip_vs_scheduler) as it can be
used by external schedulers, via {un,}register_ip_vs_scheduler.
Only 4 out of 10 schedulers use info from ip_vs_iphdr*, and when
they do, they are only interested in iph->{s,d}addr.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:07:17 +02:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2010-08-22 21:37:53 +09:00
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2010-11-08 20:05:57 +09:00
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2010-08-22 21:37:53 +09:00
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2013-03-21 11:58:10 +02:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2008-09-02 15:55:36 +02:00
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2014-09-30 10:50:06 +09:00
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2008-09-02 15:55:36 +02:00
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2013-04-17 23:50:49 +03:00
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2008-09-02 15:55:36 +02:00
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2010-08-22 21:37:54 +09:00
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2012-04-15 05:58:06 +00:00
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2013-04-17 23:50:49 +03:00
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2008-09-02 15:55:36 +02:00
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2013-04-17 23:50:49 +03:00
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2008-09-02 15:55:36 +02:00
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2012-04-15 05:58:06 +00:00
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2008-09-02 15:55:36 +02:00
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2014-09-09 16:40:20 -07:00
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2019-03-26 18:31:21 +08:00
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2019-05-30 08:16:40 +08:00
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2008-09-02 15:55:36 +02:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2013-03-22 11:46:53 +02:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:33 +02:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:33 +02:00
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2006-09-28 14:29:52 -07:00
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2005-04-16 15:20:36 -07:00
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2012-04-15 05:58:06 +00:00
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2013-04-17 23:50:49 +03:00
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2015-09-21 13:01:44 -05:00
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2005-04-16 15:20:36 -07:00
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2013-03-22 11:46:53 +02:00
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2013-03-22 11:46:51 +02:00
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2005-04-16 15:20:36 -07:00
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2010-08-22 21:37:53 +09:00
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2013-03-22 11:46:53 +02:00
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2018-05-24 23:40:12 +03:00
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2013-03-22 11:46:53 +02:00
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2005-04-16 15:20:36 -07:00
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2013-03-21 11:58:06 +02:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2013-03-21 11:58:08 +02:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:33 +02:00
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2006-09-28 14:29:52 -07:00
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2011-01-03 14:45:00 +01:00
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2012-04-15 05:58:06 +00:00
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2005-04-16 15:20:36 -07:00
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2018-03-27 23:14:40 +09:00
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2019-03-26 18:31:21 +08:00
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2019-05-30 08:16:40 +08:00
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2005-04-16 15:20:36 -07:00
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2017-03-16 10:03:34 +02:00
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2005-04-16 15:20:36 -07:00
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2013-09-12 11:21:07 +03:00
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2005-04-16 15:20:36 -07:00
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2013-03-21 11:58:06 +02:00
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2005-04-16 15:20:36 -07:00
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2013-09-12 11:21:07 +03:00
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2005-04-16 15:20:36 -07:00
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2006-09-28 14:29:52 -07:00
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2011-01-03 14:45:00 +01:00
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2005-04-16 15:20:36 -07:00
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2013-03-21 11:58:08 +02:00
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2013-03-22 11:46:49 +02:00
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2013-03-21 11:58:08 +02:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2013-03-22 11:46:50 +02:00
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2013-03-22 11:46:37 +02:00
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2005-04-16 15:20:36 -07:00
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2013-06-16 09:09:36 +03:00
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2005-04-16 15:20:36 -07:00
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2010-08-22 21:37:53 +09:00
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2010-08-22 21:37:53 +09:00
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|
ipvs: handle connections started by real-servers
When using LVS-NAT and SIP persistence-egine over UDP, the following
limitations are present with current implementation:
1) To actually have load-balancing based on Call-ID header, you need to
use one-packet-scheduling mode. But with one-packet-scheduling the
connection is deleted just after packet is forwarded, so SIP responses
coming from real-servers do not match any connection and SNAT is
not applied.
2) If you do not use "-o" option, IPVS behaves as normal UDP load
balancer, so different SIP calls (each one identified by a different
Call-ID) coming from the same ip-address/port go to the same
real-server. So basically you don’t have load-balancing based on
Call-ID as intended.
3) Call-ID is not learned when a new SIP call is started by a real-server
(inside-to-outside direction), but only in the outside-to-inside
direction. This would be a general problem for all SIP servers acting
as Back2BackUserAgent.
This patch aims to solve problems 1) and 3) while keeping OPS mode
mandatory for SIP-UDP, so that 2) is not a problem anymore.
The basic mechanism implemented is to make packets, that do not match any
existent connection but come from real-servers, create new connections
instead of let them pass without any effect.
When such packets pass through ip_vs_out(), if their source ip address and
source port match a configured real-server, a new connection is
automatically created in the same way as it would have happened if the
packet had come from outside-to-inside direction. A new connection template
is created too if the virtual-service is persistent and there is no
matching connection template found. The new connection automatically
created, if the service had "-o" option, is an OPS connection that lasts
only the time to forward the packet, just like it happens on the
ingress side.
The main part of this mechanism is implemented inside a persistent-engine
specific callback (at the moment only SIP persistent engine exists) and
is triggered only for UDP packets, since connection oriented protocols, by
using different set of ports (typically ephemeral ports) to open new
outgoing connections, should not need this feature.
The following requisites are needed for automatic connection creation; if
any is missing the packet simply goes the same way as before.
a) virtual-service is not fwmark based (this is because fwmark services
do not store address and port of the virtual-service, required to
build the connection data).
b) virtual-service and real-servers must not have been configured with
omitted port (this is again to have all data to create the connection).
Signed-off-by: Marco Angaroni <marcoangaroni@gmail.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2016-04-05 18:26:29 +02:00
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2010-08-22 21:37:53 +09:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2009-11-03 03:26:03 +00:00
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2005-04-16 15:20:36 -07:00
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2006-09-28 14:29:52 -07:00
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2005-04-16 15:20:36 -07:00
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2013-03-21 11:58:07 +02:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2010-10-17 16:17:20 +03:00
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2005-04-16 15:20:36 -07:00
|
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|
2018-05-25 22:06:25 +03:00
|
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|
2005-04-16 15:20:36 -07:00
|
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|
2014-09-30 10:50:06 +09:00
|
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2010-10-17 16:17:20 +03:00
|
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2005-04-16 15:20:36 -07:00
|
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|
2018-05-25 22:06:25 +03:00
|
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2005-04-16 15:20:36 -07:00
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|
ipvs: API change to avoid rescan of IPv6 exthdr
Reduce the number of times we scan/skip the IPv6 exthdrs.
This patch contains a lot of API changes. This is done, to avoid
repeating the scan of finding the IPv6 headers, via ipv6_find_hdr(),
which is called by ip_vs_fill_iph_skb().
Finding the IPv6 headers is done as early as possible, and passed on
as a pointer "struct ip_vs_iphdr *" to the affected functions.
This patch reduce/removes 19 calls to ip_vs_fill_iph_skb().
Notice, I have choosen, not to change the API of function
pointer "(*schedule)" (in struct ip_vs_scheduler) as it can be
used by external schedulers, via {un,}register_ip_vs_scheduler.
Only 4 out of 10 schedulers use info from ip_vs_iphdr*, and when
they do, they are only interested in iph->{s,d}addr.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:07:17 +02:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
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|
|
|
|
|
|
|
|
|
ipvs: API change to avoid rescan of IPv6 exthdr
Reduce the number of times we scan/skip the IPv6 exthdrs.
This patch contains a lot of API changes. This is done, to avoid
repeating the scan of finding the IPv6 headers, via ipv6_find_hdr(),
which is called by ip_vs_fill_iph_skb().
Finding the IPv6 headers is done as early as possible, and passed on
as a pointer "struct ip_vs_iphdr *" to the affected functions.
This patch reduce/removes 19 calls to ip_vs_fill_iph_skb().
Notice, I have choosen, not to change the API of function
pointer "(*schedule)" (in struct ip_vs_scheduler) as it can be
used by external schedulers, via {un,}register_ip_vs_scheduler.
Only 4 out of 10 schedulers use info from ip_vs_iphdr*, and when
they do, they are only interested in iph->{s,d}addr.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:07:17 +02:00
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2005-04-16 15:20:36 -07:00
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2012-05-08 19:40:30 +02:00
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2013-04-29 11:55:10 -07:00
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2012-05-08 19:40:30 +02:00
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2019-06-18 23:07:36 +03:00
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2013-03-22 11:46:49 +02:00
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2015-07-26 15:03:27 +03:00
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2015-07-26 15:03:28 +03:00
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2015-07-26 15:03:27 +03:00
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2015-07-26 15:03:28 +03:00
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2015-07-26 15:03:27 +03:00
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2011-03-04 12:18:07 +02:00
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2011-05-03 22:09:31 +02:00
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2014-09-30 10:50:06 +09:00
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2011-03-04 12:18:07 +02:00
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2013-03-21 11:58:08 +02:00
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2011-03-04 12:18:07 +02:00
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2014-09-30 10:50:06 +09:00
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2011-03-04 12:18:07 +02:00
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2011-03-04 12:20:35 +02:00
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2011-03-04 12:18:07 +02:00
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2011-02-04 18:33:02 +09:00
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2011-03-04 12:18:07 +02:00
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2013-03-22 11:46:49 +02:00
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2011-03-04 12:18:07 +02:00
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ipvs: handle connections started by real-servers
When using LVS-NAT and SIP persistence-egine over UDP, the following
limitations are present with current implementation:
1) To actually have load-balancing based on Call-ID header, you need to
use one-packet-scheduling mode. But with one-packet-scheduling the
connection is deleted just after packet is forwarded, so SIP responses
coming from real-servers do not match any connection and SNAT is
not applied.
2) If you do not use "-o" option, IPVS behaves as normal UDP load
balancer, so different SIP calls (each one identified by a different
Call-ID) coming from the same ip-address/port go to the same
real-server. So basically you don’t have load-balancing based on
Call-ID as intended.
3) Call-ID is not learned when a new SIP call is started by a real-server
(inside-to-outside direction), but only in the outside-to-inside
direction. This would be a general problem for all SIP servers acting
as Back2BackUserAgent.
This patch aims to solve problems 1) and 3) while keeping OPS mode
mandatory for SIP-UDP, so that 2) is not a problem anymore.
The basic mechanism implemented is to make packets, that do not match any
existent connection but come from real-servers, create new connections
instead of let them pass without any effect.
When such packets pass through ip_vs_out(), if their source ip address and
source port match a configured real-server, a new connection is
automatically created in the same way as it would have happened if the
packet had come from outside-to-inside direction. A new connection template
is created too if the virtual-service is persistent and there is no
matching connection template found. The new connection automatically
created, if the service had "-o" option, is an OPS connection that lasts
only the time to forward the packet, just like it happens on the
ingress side.
The main part of this mechanism is implemented inside a persistent-engine
specific callback (at the moment only SIP persistent engine exists) and
is triggered only for UDP packets, since connection oriented protocols, by
using different set of ports (typically ephemeral ports) to open new
outgoing connections, should not need this feature.
The following requisites are needed for automatic connection creation; if
any is missing the packet simply goes the same way as before.
a) virtual-service is not fwmark based (this is because fwmark services
do not store address and port of the virtual-service, required to
build the connection data).
b) virtual-service and real-servers must not have been configured with
omitted port (this is again to have all data to create the connection).
Signed-off-by: Marco Angaroni <marcoangaroni@gmail.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2016-04-05 18:26:29 +02:00
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2011-03-04 12:18:07 +02:00
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2011-02-04 18:33:02 +09:00
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2011-03-04 12:18:07 +02:00
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2011-02-04 18:33:02 +09:00
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2011-03-04 12:18:07 +02:00
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2012-05-08 19:40:30 +02:00
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2013-06-24 22:44:41 +03:00
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2013-04-29 11:55:10 -07:00
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2012-05-08 19:39:49 +02:00
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2011-03-04 12:18:07 +02:00
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2013-06-13 08:56:15 +01:00
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2011-03-04 12:18:07 +02:00
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2012-04-24 23:46:40 +03:00
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2011-03-04 12:18:07 +02:00
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2012-07-20 11:59:53 +03:00
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2013-03-09 23:25:04 +02:00
|
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2015-02-23 15:02:34 -03:00
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2015-08-26 09:40:34 -07:00
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2015-09-14 23:23:05 -07:00
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2011-03-04 12:18:07 +02:00
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2012-05-08 19:40:30 +02:00
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2011-03-04 12:18:07 +02:00
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2019-06-18 23:07:36 +03:00
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2012-05-08 19:40:30 +02:00
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2011-03-04 12:18:07 +02:00
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2011-10-11 10:54:35 +09:00
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2015-07-26 15:03:27 +03:00
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2011-03-04 12:18:07 +02:00
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2014-09-30 10:50:06 +09:00
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2014-09-09 16:40:24 -07:00
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2011-03-04 12:18:07 +02:00
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2005-04-16 15:20:36 -07:00
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2011-02-04 18:33:01 +09:00
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2011-02-04 18:33:01 +09:00
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2013-06-13 08:56:15 +01:00
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2012-04-24 23:46:40 +03:00
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2012-05-08 19:39:49 +02:00
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2012-04-24 23:46:40 +03:00
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2012-05-08 19:40:30 +02:00
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2011-02-04 18:33:01 +09:00
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locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()
Please do not apply this to mainline directly, instead please re-run the
coccinelle script shown below and apply its output.
For several reasons, it is desirable to use {READ,WRITE}_ONCE() in
preference to ACCESS_ONCE(), and new code is expected to use one of the
former. So far, there's been no reason to change most existing uses of
ACCESS_ONCE(), as these aren't harmful, and changing them results in
churn.
However, for some features, the read/write distinction is critical to
correct operation. To distinguish these cases, separate read/write
accessors must be used. This patch migrates (most) remaining
ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following
coccinelle script:
----
// Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and
// WRITE_ONCE()
// $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch
virtual patch
@ depends on patch @
expression E1, E2;
@@
- ACCESS_ONCE(E1) = E2
+ WRITE_ONCE(E1, E2)
@ depends on patch @
expression E;
@@
- ACCESS_ONCE(E)
+ READ_ONCE(E)
----
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: davem@davemloft.net
Cc: linux-arch@vger.kernel.org
Cc: mpe@ellerman.id.au
Cc: shuah@kernel.org
Cc: snitzer@redhat.com
Cc: thor.thayer@linux.intel.com
Cc: tj@kernel.org
Cc: viro@zeniv.linux.org.uk
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23 14:07:29 -07:00
|
|
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|
2012-04-24 23:46:40 +03:00
|
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|
locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()
Please do not apply this to mainline directly, instead please re-run the
coccinelle script shown below and apply its output.
For several reasons, it is desirable to use {READ,WRITE}_ONCE() in
preference to ACCESS_ONCE(), and new code is expected to use one of the
former. So far, there's been no reason to change most existing uses of
ACCESS_ONCE(), as these aren't harmful, and changing them results in
churn.
However, for some features, the read/write distinction is critical to
correct operation. To distinguish these cases, separate read/write
accessors must be used. This patch migrates (most) remaining
ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following
coccinelle script:
----
// Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and
// WRITE_ONCE()
// $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch
virtual patch
@ depends on patch @
expression E1, E2;
@@
- ACCESS_ONCE(E1) = E2
+ WRITE_ONCE(E1, E2)
@ depends on patch @
expression E;
@@
- ACCESS_ONCE(E)
+ READ_ONCE(E)
----
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: davem@davemloft.net
Cc: linux-arch@vger.kernel.org
Cc: mpe@ellerman.id.au
Cc: shuah@kernel.org
Cc: snitzer@redhat.com
Cc: thor.thayer@linux.intel.com
Cc: tj@kernel.org
Cc: viro@zeniv.linux.org.uk
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23 14:07:29 -07:00
|
|
|
|
2012-04-24 23:46:40 +03:00
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|
2011-02-04 18:33:01 +09:00
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2011-02-04 18:33:01 +09:00
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2013-06-13 08:56:15 +01:00
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2012-05-08 19:40:30 +02:00
|
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|
locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()
Please do not apply this to mainline directly, instead please re-run the
coccinelle script shown below and apply its output.
For several reasons, it is desirable to use {READ,WRITE}_ONCE() in
preference to ACCESS_ONCE(), and new code is expected to use one of the
former. So far, there's been no reason to change most existing uses of
ACCESS_ONCE(), as these aren't harmful, and changing them results in
churn.
However, for some features, the read/write distinction is critical to
correct operation. To distinguish these cases, separate read/write
accessors must be used. This patch migrates (most) remaining
ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following
coccinelle script:
----
// Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and
// WRITE_ONCE()
// $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch
virtual patch
@ depends on patch @
expression E1, E2;
@@
- ACCESS_ONCE(E1) = E2
+ WRITE_ONCE(E1, E2)
@ depends on patch @
expression E;
@@
- ACCESS_ONCE(E)
+ READ_ONCE(E)
----
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: davem@davemloft.net
Cc: linux-arch@vger.kernel.org
Cc: mpe@ellerman.id.au
Cc: shuah@kernel.org
Cc: snitzer@redhat.com
Cc: thor.thayer@linux.intel.com
Cc: tj@kernel.org
Cc: viro@zeniv.linux.org.uk
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-10-23 14:07:29 -07:00
|
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|
2012-05-08 19:40:30 +02:00
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2013-06-24 22:44:41 +03:00
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2013-04-29 11:55:10 -07:00
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2012-05-08 19:39:49 +02:00
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2012-07-20 11:59:53 +03:00
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2013-03-09 23:25:04 +02:00
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2015-02-23 15:02:34 -03:00
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2015-08-26 09:40:34 -07:00
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2015-09-14 23:23:05 -07:00
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2015-09-21 13:02:49 -05:00
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2011-02-04 18:33:01 +09:00
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2012-04-24 23:46:40 +03:00
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2011-02-04 18:33:01 +09:00
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2013-06-13 08:56:15 +01:00
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2012-05-08 19:40:30 +02:00
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2013-06-24 22:44:41 +03:00
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2013-04-29 11:55:10 -07:00
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2012-05-08 19:39:49 +02:00
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2012-07-20 11:59:53 +03:00
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2013-03-09 23:25:04 +02:00
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2015-02-23 15:02:34 -03:00
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2015-08-26 09:40:34 -07:00
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2015-09-14 23:23:05 -07:00
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2015-09-21 13:02:49 -05:00
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2011-02-04 18:33:01 +09:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2013-09-21 10:22:42 -07:00
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ipvs: handle connections started by real-servers
When using LVS-NAT and SIP persistence-egine over UDP, the following
limitations are present with current implementation:
1) To actually have load-balancing based on Call-ID header, you need to
use one-packet-scheduling mode. But with one-packet-scheduling the
connection is deleted just after packet is forwarded, so SIP responses
coming from real-servers do not match any connection and SNAT is
not applied.
2) If you do not use "-o" option, IPVS behaves as normal UDP load
balancer, so different SIP calls (each one identified by a different
Call-ID) coming from the same ip-address/port go to the same
real-server. So basically you don’t have load-balancing based on
Call-ID as intended.
3) Call-ID is not learned when a new SIP call is started by a real-server
(inside-to-outside direction), but only in the outside-to-inside
direction. This would be a general problem for all SIP servers acting
as Back2BackUserAgent.
This patch aims to solve problems 1) and 3) while keeping OPS mode
mandatory for SIP-UDP, so that 2) is not a problem anymore.
The basic mechanism implemented is to make packets, that do not match any
existent connection but come from real-servers, create new connections
instead of let them pass without any effect.
When such packets pass through ip_vs_out(), if their source ip address and
source port match a configured real-server, a new connection is
automatically created in the same way as it would have happened if the
packet had come from outside-to-inside direction. A new connection template
is created too if the virtual-service is persistent and there is no
matching connection template found. The new connection automatically
created, if the service had "-o" option, is an OPS connection that lasts
only the time to forward the packet, just like it happens on the
ingress side.
The main part of this mechanism is implemented inside a persistent-engine
specific callback (at the moment only SIP persistent engine exists) and
is triggered only for UDP packets, since connection oriented protocols, by
using different set of ports (typically ephemeral ports) to open new
outgoing connections, should not need this feature.
The following requisites are needed for automatic connection creation; if
any is missing the packet simply goes the same way as before.
a) virtual-service is not fwmark based (this is because fwmark services
do not store address and port of the virtual-service, required to
build the connection data).
b) virtual-service and real-servers must not have been configured with
omitted port (this is again to have all data to create the connection).
Signed-off-by: Marco Angaroni <marcoangaroni@gmail.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2016-04-05 18:26:29 +02:00
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2008-08-10 09:18:01 +00:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:01:43 -05:00
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2010-08-22 21:37:52 +09:00
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2015-09-21 13:01:43 -05:00
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2010-08-22 21:37:52 +09:00
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2010-08-22 21:37:53 +09:00
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2010-08-22 21:37:52 +09:00
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2008-09-02 15:55:43 +02:00
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2010-08-22 21:37:52 +09:00
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2008-09-02 15:55:43 +02:00
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2015-09-21 13:02:38 -05:00
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2015-08-26 09:40:32 -07:00
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2010-08-02 17:12:44 +02:00
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2010-08-22 21:37:52 +09:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:39 -05:00
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2015-08-26 09:40:32 -07:00
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2010-08-02 17:12:44 +02:00
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2013-03-21 11:58:10 +02:00
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2017-03-16 10:03:34 +02:00
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2013-03-21 11:58:10 +02:00
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2005-04-16 15:20:36 -07:00
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2014-03-17 18:06:10 +01:00
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2017-03-16 10:03:34 +02:00
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2005-04-16 15:20:36 -07:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2014-09-09 16:40:23 -07:00
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2010-08-22 21:37:52 +09:00
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2012-04-15 05:58:06 +00:00
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2010-11-19 14:25:07 +01:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2018-07-06 08:25:52 +03:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:57 -05:00
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2016-05-16 19:18:09 +02:00
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2015-09-21 13:02:24 -05:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:53 +02:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:53 +02:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:53 +02:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:53 +02:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:53 +02:00
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2005-04-16 15:20:36 -07:00
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2018-07-06 08:25:53 +03:00
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2014-09-30 10:50:06 +09:00
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2015-09-21 13:02:28 -05:00
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2015-09-21 13:02:26 -05:00
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2015-09-21 13:02:58 -05:00
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2015-09-21 13:02:34 -05:00
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2015-09-21 13:02:42 -05:00
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2015-09-21 13:02:20 -05:00
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2015-09-21 13:02:42 -05:00
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2015-09-21 13:02:34 -05:00
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2015-09-21 13:02:58 -05:00
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2015-09-21 13:02:26 -05:00
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2015-09-21 13:02:28 -05:00
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2015-09-21 13:02:21 -05:00
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2015-09-21 13:01:58 -05:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:32 -05:00
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2013-09-21 10:22:42 -07:00
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2015-09-21 13:02:31 -05:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2018-05-25 22:06:25 +03:00
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2005-04-16 15:20:36 -07:00
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2010-08-22 21:37:54 +09:00
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2010-11-08 20:05:57 +09:00
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2010-11-19 14:25:12 +01:00
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2010-11-08 20:05:57 +09:00
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2014-09-30 10:50:06 +09:00
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2011-08-29 12:40:15 -04:00
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2010-11-08 20:05:57 +09:00
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2011-08-29 12:40:15 -04:00
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2010-11-08 20:05:57 +09:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2010-02-18 12:31:05 +01:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2013-09-21 10:22:42 -07:00
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2010-10-17 16:24:37 +03:00
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|
ipvs: API change to avoid rescan of IPv6 exthdr
Reduce the number of times we scan/skip the IPv6 exthdrs.
This patch contains a lot of API changes. This is done, to avoid
repeating the scan of finding the IPv6 headers, via ipv6_find_hdr(),
which is called by ip_vs_fill_iph_skb().
Finding the IPv6 headers is done as early as possible, and passed on
as a pointer "struct ip_vs_iphdr *" to the affected functions.
This patch reduce/removes 19 calls to ip_vs_fill_iph_skb().
Notice, I have choosen, not to change the API of function
pointer "(*schedule)" (in struct ip_vs_scheduler) as it can be
used by external schedulers, via {un,}register_ip_vs_scheduler.
Only 4 out of 10 schedulers use info from ip_vs_iphdr*, and when
they do, they are only interested in iph->{s,d}addr.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-09-26 14:07:17 +02:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2013-09-21 10:22:42 -07:00
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2011-02-11 14:01:12 +01:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2010-11-19 14:25:14 +01:00
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2005-04-16 15:20:36 -07:00
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2013-09-21 10:22:42 -07:00
|
|
|
|
2015-09-21 13:01:49 -05:00
|
|
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|
2008-09-02 15:55:38 +02:00
|
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:01:50 -05:00
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2013-09-21 10:22:42 -07:00
|
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|
2008-09-02 15:55:48 +02:00
|
|
|
|
ipvs: handle connections started by real-servers
When using LVS-NAT and SIP persistence-egine over UDP, the following
limitations are present with current implementation:
1) To actually have load-balancing based on Call-ID header, you need to
use one-packet-scheduling mode. But with one-packet-scheduling the
connection is deleted just after packet is forwarded, so SIP responses
coming from real-servers do not match any connection and SNAT is
not applied.
2) If you do not use "-o" option, IPVS behaves as normal UDP load
balancer, so different SIP calls (each one identified by a different
Call-ID) coming from the same ip-address/port go to the same
real-server. So basically you don’t have load-balancing based on
Call-ID as intended.
3) Call-ID is not learned when a new SIP call is started by a real-server
(inside-to-outside direction), but only in the outside-to-inside
direction. This would be a general problem for all SIP servers acting
as Back2BackUserAgent.
This patch aims to solve problems 1) and 3) while keeping OPS mode
mandatory for SIP-UDP, so that 2) is not a problem anymore.
The basic mechanism implemented is to make packets, that do not match any
existent connection but come from real-servers, create new connections
instead of let them pass without any effect.
When such packets pass through ip_vs_out(), if their source ip address and
source port match a configured real-server, a new connection is
automatically created in the same way as it would have happened if the
packet had come from outside-to-inside direction. A new connection template
is created too if the virtual-service is persistent and there is no
matching connection template found. The new connection automatically
created, if the service had "-o" option, is an OPS connection that lasts
only the time to forward the packet, just like it happens on the
ingress side.
The main part of this mechanism is implemented inside a persistent-engine
specific callback (at the moment only SIP persistent engine exists) and
is triggered only for UDP packets, since connection oriented protocols, by
using different set of ports (typically ephemeral ports) to open new
outgoing connections, should not need this feature.
The following requisites are needed for automatic connection creation; if
any is missing the packet simply goes the same way as before.
a) virtual-service is not fwmark based (this is because fwmark services
do not store address and port of the virtual-service, required to
build the connection data).
b) virtual-service and real-servers must not have been configured with
omitted port (this is again to have all data to create the connection).
Signed-off-by: Marco Angaroni <marcoangaroni@gmail.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2016-04-05 18:26:29 +02:00
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2019-05-05 15:14:39 +03:00
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ipvs: handle connections started by real-servers
When using LVS-NAT and SIP persistence-egine over UDP, the following
limitations are present with current implementation:
1) To actually have load-balancing based on Call-ID header, you need to
use one-packet-scheduling mode. But with one-packet-scheduling the
connection is deleted just after packet is forwarded, so SIP responses
coming from real-servers do not match any connection and SNAT is
not applied.
2) If you do not use "-o" option, IPVS behaves as normal UDP load
balancer, so different SIP calls (each one identified by a different
Call-ID) coming from the same ip-address/port go to the same
real-server. So basically you don’t have load-balancing based on
Call-ID as intended.
3) Call-ID is not learned when a new SIP call is started by a real-server
(inside-to-outside direction), but only in the outside-to-inside
direction. This would be a general problem for all SIP servers acting
as Back2BackUserAgent.
This patch aims to solve problems 1) and 3) while keeping OPS mode
mandatory for SIP-UDP, so that 2) is not a problem anymore.
The basic mechanism implemented is to make packets, that do not match any
existent connection but come from real-servers, create new connections
instead of let them pass without any effect.
When such packets pass through ip_vs_out(), if their source ip address and
source port match a configured real-server, a new connection is
automatically created in the same way as it would have happened if the
packet had come from outside-to-inside direction. A new connection template
is created too if the virtual-service is persistent and there is no
matching connection template found. The new connection automatically
created, if the service had "-o" option, is an OPS connection that lasts
only the time to forward the packet, just like it happens on the
ingress side.
The main part of this mechanism is implemented inside a persistent-engine
specific callback (at the moment only SIP persistent engine exists) and
is triggered only for UDP packets, since connection oriented protocols, by
using different set of ports (typically ephemeral ports) to open new
outgoing connections, should not need this feature.
The following requisites are needed for automatic connection creation; if
any is missing the packet simply goes the same way as before.
a) virtual-service is not fwmark based (this is because fwmark services
do not store address and port of the virtual-service, required to
build the connection data).
b) virtual-service and real-servers must not have been configured with
omitted port (this is again to have all data to create the connection).
Signed-off-by: Marco Angaroni <marcoangaroni@gmail.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2016-04-05 18:26:29 +02:00
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2013-09-21 10:22:42 -07:00
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2015-09-21 13:01:51 -05:00
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2014-09-09 16:40:21 -07:00
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2011-12-30 14:19:02 +09:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2013-03-22 11:46:38 +02:00
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2017-03-16 10:03:34 +02:00
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2013-03-22 11:46:38 +02:00
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2014-03-17 18:06:10 +01:00
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2017-03-16 10:03:34 +02:00
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2013-03-22 11:46:38 +02:00
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2005-04-16 15:20:36 -07:00
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2013-10-09 09:24:27 +03:00
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2017-03-16 10:03:34 +02:00
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2013-10-09 09:24:27 +03:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2015-09-21 13:02:10 -05:00
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2015-07-26 15:03:27 +03:00
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2015-09-21 13:02:11 -05:00
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2015-09-21 13:02:17 -05:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2015-09-21 13:02:23 -05:00
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2013-09-21 10:22:42 -07:00
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2015-02-06 09:44:44 +02:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2008-09-02 15:55:45 +02:00
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2013-09-21 10:22:42 -07:00
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2008-09-02 15:55:45 +02:00
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2005-04-16 15:20:36 -07:00
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2011-02-04 18:33:02 +09:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2011-01-03 14:44:58 +01:00
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2005-04-16 15:20:36 -07:00
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2011-01-03 14:44:58 +01:00
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2005-04-16 15:20:36 -07:00
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2011-02-04 18:33:02 +09:00
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2005-04-16 15:20:36 -07:00
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2019-05-05 15:14:38 +03:00
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2014-09-30 10:50:06 +09:00
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2005-04-16 15:20:36 -07:00
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2005-09-01 17:40:26 -07:00
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2005-04-16 15:20:36 -07:00
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2013-09-21 10:22:42 -07:00
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2008-09-02 15:55:45 +02:00
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2013-09-21 10:22:42 -07:00
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2008-09-02 15:55:45 +02:00
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2005-04-16 15:20:36 -07:00
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2013-09-21 10:22:42 -07:00
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2005-04-16 15:20:36 -07:00
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2006-11-16 02:41:18 -08:00
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2005-04-16 15:20:36 -07:00
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2006-11-16 02:41:18 -08:00
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2005-04-16 15:20:36 -07:00
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2008-11-19 15:44:53 -08:00
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2006-11-16 02:41:18 -08:00
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2008-09-02 15:55:42 +02:00
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2008-11-19 15:44:53 -08:00
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2008-09-02 15:55:42 +02:00
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2006-11-16 02:41:18 -08:00
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2008-11-19 15:44:53 -08:00
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2005-04-16 15:20:36 -07:00
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2014-09-30 10:50:06 +09:00
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2010-10-17 16:21:07 +03:00
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2011-03-09 22:55:05 +01:00
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2010-10-17 16:21:07 +03:00
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2017-04-14 20:31:09 +02:00
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2017-01-23 18:21:55 +01:00
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netfilter: kill the fake untracked conntrack objects
resurrect an old patch from Pablo Neira to remove the untracked objects.
Currently, there are four possible states of an skb wrt. conntrack.
1. No conntrack attached, ct is NULL.
2. Normal (kmem cache allocated) ct attached.
3. a template (kmalloc'd), not in any hash tables at any point in time
4. the 'untracked' conntrack, a percpu nf_conn object, tagged via
IPS_UNTRACKED_BIT in ct->status.
Untracked is supposed to be identical to case 1. It exists only
so users can check
-m conntrack --ctstate UNTRACKED vs.
-m conntrack --ctstate INVALID
e.g. attempts to set connmark on INVALID or UNTRACKED conntracks is
supposed to be a no-op.
Thus currently we need to check
ct == NULL || nf_ct_is_untracked(ct)
in a lot of places in order to avoid altering untracked objects.
The other consequence of the percpu untracked object is that all
-j NOTRACK (and, later, kfree_skb of such skbs) result in an atomic op
(inc/dec the untracked conntracks refcount).
This adds a new kernel-private ctinfo state, IP_CT_UNTRACKED, to
make the distinction instead.
The (few) places that care about packet invalid (ct is NULL) vs.
packet untracked now need to test ct == NULL vs. ctinfo == IP_CT_UNTRACKED,
but all other places can omit the nf_ct_is_untracked() check.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2017-04-14 20:31:08 +02:00
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2010-10-17 16:21:07 +03:00
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2010-09-21 17:35:41 +02:00
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2014-09-30 10:50:06 +09:00
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2010-09-21 17:35:41 +02:00
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2011-01-03 14:44:58 +01:00
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2010-09-21 17:35:41 +02:00
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2011-02-04 18:33:02 +09:00
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2011-01-03 14:44:58 +01:00
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2011-02-04 18:33:02 +09:00
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2010-09-21 17:35:41 +02:00
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2013-09-21 10:22:42 -07:00
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2010-09-21 17:35:41 +02:00
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2011-01-03 14:44:58 +01:00
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2010-09-21 17:35:41 +02:00
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2011-10-20 13:18:04 +01:00
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2010-09-21 17:35:41 +02:00
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2014-09-30 10:50:06 +09:00
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2010-09-05 18:02:29 +00:00
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ipvs: drop first packet to redirect conntrack
Jiri Bohac is reporting for a problem where the attempt
to reschedule existing connection to another real server
needs proper redirect for the conntrack used by the IPVS
connection. For example, when IPVS connection is created
to NAT-ed real server we alter the reply direction of
conntrack. If we later decide to select different real
server we can not alter again the conntrack. And if we
expire the old connection, the new connection is left
without conntrack.
So, the only way to redirect both the IPVS connection and
the Netfilter's conntrack is to drop the SYN packet that
hits existing connection, to wait for the next jiffie
to expire the old connection and its conntrack and to rely
on client's retransmission to create new connection as
usually.
Jiri Bohac provided a fix that drops all SYNs on rescheduling,
I extended his patch to do such drops only for connections
that use conntrack. Here is the original report from Jiri Bohac:
Since commit dc7b3eb900aa ("ipvs: Fix reuse connection if real server
is dead"), new connections to dead servers are redistributed
immediately to new servers. The old connection is expired using
ip_vs_conn_expire_now() which sets the connection timer to expire
immediately.
However, before the timer callback, ip_vs_conn_expire(), is run
to clean the connection's conntrack entry, the new redistributed
connection may already be established and its conntrack removed
instead.
Fix this by dropping the first packet of the new connection
instead, like we do when the destination server is not available.
The timer will have deleted the old conntrack entry long before
the first packet of the new connection is retransmitted.
Fixes: dc7b3eb900aa ("ipvs: Fix reuse connection if real server is dead")
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2016-03-05 15:03:22 +02:00
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2017-04-14 20:31:09 +02:00
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|
ipvs: drop first packet to redirect conntrack
Jiri Bohac is reporting for a problem where the attempt
to reschedule existing connection to another real server
needs proper redirect for the conntrack used by the IPVS
connection. For example, when IPVS connection is created
to NAT-ed real server we alter the reply direction of
conntrack. If we later decide to select different real
server we can not alter again the conntrack. And if we
expire the old connection, the new connection is left
without conntrack.
So, the only way to redirect both the IPVS connection and
the Netfilter's conntrack is to drop the SYN packet that
hits existing connection, to wait for the next jiffie
to expire the old connection and its conntrack and to rely
on client's retransmission to create new connection as
usually.
Jiri Bohac provided a fix that drops all SYNs on rescheduling,
I extended his patch to do such drops only for connections
that use conntrack. Here is the original report from Jiri Bohac:
Since commit dc7b3eb900aa ("ipvs: Fix reuse connection if real server
is dead"), new connections to dead servers are redistributed
immediately to new servers. The old connection is expired using
ip_vs_conn_expire_now() which sets the connection timer to expire
immediately.
However, before the timer callback, ip_vs_conn_expire(), is run
to clean the connection's conntrack entry, the new redistributed
connection may already be established and its conntrack removed
instead.
Fix this by dropping the first packet of the new connection
instead, like we do when the destination server is not available.
The timer will have deleted the old conntrack entry long before
the first packet of the new connection is retransmitted.
Fixes: dc7b3eb900aa ("ipvs: Fix reuse connection if real server is dead")
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2016-03-05 15:03:22 +02:00
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2018-05-24 23:40:12 +03:00
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2013-08-10 01:26:18 -07:00
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2011-02-19 17:32:28 +08:00
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2014-09-30 10:50:06 +09:00
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2011-02-19 17:32:28 +08:00
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2008-07-31 20:45:24 -07:00
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