License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2005-04-17 06:20:36 +08:00
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#ifndef __LINUX_NETFILTER_H
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#define __LINUX_NETFILTER_H
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/net.h>
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#include <linux/if.h>
|
2008-01-15 15:40:34 +08:00
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#include <linux/in.h>
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#include <linux/in6.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/wait.h>
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#include <linux/list.h>
|
2014-08-22 10:40:15 +08:00
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#include <linux/static_key.h>
|
2015-06-17 23:28:27 +08:00
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#include <linux/netfilter_defs.h>
|
2015-07-11 07:15:06 +08:00
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#include <linux/netdevice.h>
|
2020-07-23 14:08:54 +08:00
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#include <linux/sockptr.h>
|
2015-07-11 07:15:06 +08:00
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#include <net/net_namespace.h>
|
2015-06-17 23:28:27 +08:00
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|
2011-01-18 22:52:14 +08:00
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static inline int NF_DROP_GETERR(int verdict)
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{
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return -(verdict >> NF_VERDICT_QBITS);
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}
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2005-04-17 06:20:36 +08:00
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2008-03-26 11:09:33 +08:00
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static inline int nf_inet_addr_cmp(const union nf_inet_addr *a1,
|
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|
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const union nf_inet_addr *a2)
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{
|
2019-03-26 20:06:20 +08:00
|
|
|
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
|
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|
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const unsigned long *ul1 = (const unsigned long *)a1;
|
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|
const unsigned long *ul2 = (const unsigned long *)a2;
|
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return ((ul1[0] ^ ul2[0]) | (ul1[1] ^ ul2[1])) == 0UL;
|
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|
#else
|
2008-03-26 11:09:33 +08:00
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|
return a1->all[0] == a2->all[0] &&
|
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a1->all[1] == a2->all[1] &&
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|
a1->all[2] == a2->all[2] &&
|
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a1->all[3] == a2->all[3];
|
2019-03-26 20:06:20 +08:00
|
|
|
#endif
|
2008-03-26 11:09:33 +08:00
|
|
|
}
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|
2012-05-18 04:08:57 +08:00
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static inline void nf_inet_addr_mask(const union nf_inet_addr *a1,
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union nf_inet_addr *result,
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const union nf_inet_addr *mask)
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{
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2019-04-28 15:12:19 +08:00
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#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
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const unsigned long *ua = (const unsigned long *)a1;
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unsigned long *ur = (unsigned long *)result;
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const unsigned long *um = (const unsigned long *)mask;
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ur[0] = ua[0] & um[0];
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ur[1] = ua[1] & um[1];
|
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#else
|
2012-05-18 04:08:57 +08:00
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result->all[0] = a1->all[0] & mask->all[0];
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result->all[1] = a1->all[1] & mask->all[1];
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|
result->all[2] = a1->all[2] & mask->all[2];
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|
result->all[3] = a1->all[3] & mask->all[3];
|
2019-04-28 15:12:19 +08:00
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|
#endif
|
2012-05-18 04:08:57 +08:00
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}
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|
2013-09-27 05:48:15 +08:00
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int netfilter_init(void);
|
2005-04-17 06:20:36 +08:00
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struct sk_buff;
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2013-10-10 15:21:55 +08:00
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struct nf_hook_ops;
|
2015-04-04 04:23:58 +08:00
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2015-04-06 10:19:00 +08:00
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struct sock;
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2015-04-04 04:23:58 +08:00
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struct nf_hook_state {
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2021-05-28 18:30:04 +08:00
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u8 hook;
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u8 pf;
|
2015-04-04 04:23:58 +08:00
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struct net_device *in;
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struct net_device *out;
|
2015-04-06 10:19:00 +08:00
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struct sock *sk;
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2015-09-16 09:03:50 +08:00
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struct net *net;
|
2015-09-16 09:04:18 +08:00
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int (*okfn)(struct net *, struct sock *, struct sk_buff *);
|
2015-04-04 04:23:58 +08:00
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};
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|
2016-09-21 23:35:07 +08:00
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typedef unsigned int nf_hookfn(void *priv,
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struct sk_buff *skb,
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const struct nf_hook_state *state);
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2021-06-04 18:27:06 +08:00
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enum nf_hook_ops_type {
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NF_HOOK_OP_UNDEFINED,
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NF_HOOK_OP_NF_TABLES,
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};
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2016-09-21 23:35:07 +08:00
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struct nf_hook_ops {
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/* User fills in from here down. */
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nf_hookfn *hook;
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struct net_device *dev;
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void *priv;
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2021-06-04 18:27:06 +08:00
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u8 pf;
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enum nf_hook_ops_type hook_ops_type:8;
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2016-09-21 23:35:07 +08:00
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unsigned int hooknum;
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/* Hooks are ordered in ascending priority. */
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int priority;
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};
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struct nf_hook_entry {
|
2016-11-16 06:48:45 +08:00
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nf_hookfn *hook;
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void *priv;
|
2016-09-21 23:35:07 +08:00
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};
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2017-12-01 07:21:04 +08:00
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struct nf_hook_entries_rcu_head {
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struct rcu_head head;
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void *allocation;
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};
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2017-08-24 06:08:32 +08:00
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struct nf_hook_entries {
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u16 num_hook_entries;
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/* padding */
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struct nf_hook_entry hooks[];
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2017-12-01 07:21:04 +08:00
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/* trailer: pointers to original orig_ops of each hook,
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* followed by rcu_head and scratch space used for freeing
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* the structure via call_rcu.
|
2017-08-24 06:08:32 +08:00
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*
|
2017-12-01 07:21:04 +08:00
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* This is not part of struct nf_hook_entry since its only
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* needed in slow path (hook register/unregister):
|
2017-08-24 06:08:32 +08:00
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* const struct nf_hook_ops *orig_ops[]
|
2017-12-01 07:21:04 +08:00
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*
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* For the same reason, we store this at end -- its
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* only needed when a hook is deleted, not during
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* packet path processing:
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* struct nf_hook_entries_rcu_head head
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2017-08-24 06:08:32 +08:00
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*/
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};
|
2016-11-16 06:48:44 +08:00
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2019-09-13 16:13:16 +08:00
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#ifdef CONFIG_NETFILTER
|
2017-08-24 06:08:32 +08:00
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static inline struct nf_hook_ops **nf_hook_entries_get_hook_ops(const struct nf_hook_entries *e)
|
2016-11-16 06:48:44 +08:00
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{
|
2017-08-24 06:08:32 +08:00
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unsigned int n = e->num_hook_entries;
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const void *hook_end;
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hook_end = &e->hooks[n]; /* this is *past* ->hooks[]! */
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return (struct nf_hook_ops **)hook_end;
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2016-11-16 06:48:44 +08:00
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}
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static inline int
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nf_hook_entry_hookfn(const struct nf_hook_entry *entry, struct sk_buff *skb,
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struct nf_hook_state *state)
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{
|
2016-11-16 06:48:45 +08:00
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return entry->hook(entry->priv, skb, state);
|
2016-11-16 06:48:44 +08:00
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}
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2015-04-06 10:18:54 +08:00
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static inline void nf_hook_state_init(struct nf_hook_state *p,
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unsigned int hook,
|
2016-11-03 17:56:12 +08:00
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u_int8_t pf,
|
2015-04-06 10:18:54 +08:00
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struct net_device *indev,
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struct net_device *outdev,
|
2015-04-06 10:19:00 +08:00
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struct sock *sk,
|
2015-09-16 09:03:50 +08:00
|
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struct net *net,
|
2015-09-16 09:04:18 +08:00
|
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int (*okfn)(struct net *, struct sock *, struct sk_buff *))
|
2015-04-06 10:18:54 +08:00
|
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{
|
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p->hook = hook;
|
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p->pf = pf;
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p->in = indev;
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p->out = outdev;
|
2015-04-06 10:19:00 +08:00
|
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p->sk = sk;
|
2015-09-16 09:03:50 +08:00
|
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|
p->net = net;
|
2015-04-06 10:18:54 +08:00
|
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|
p->okfn = okfn;
|
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}
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|
2005-04-17 06:20:36 +08:00
|
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2009-11-05 01:50:58 +08:00
|
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struct nf_sockopt_ops {
|
2005-04-17 06:20:36 +08:00
|
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struct list_head list;
|
|
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|
2008-10-08 17:35:00 +08:00
|
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|
u_int8_t pf;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
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|
|
/* Non-inclusive ranges: use 0/0/NULL to never get called. */
|
|
|
|
|
int set_optmin;
|
|
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|
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int set_optmax;
|
2020-07-23 14:08:54 +08:00
|
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int (*set)(struct sock *sk, int optval, sockptr_t arg,
|
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unsigned int len);
|
2005-04-17 06:20:36 +08:00
|
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int get_optmin;
|
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int get_optmax;
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int (*get)(struct sock *sk, int optval, void __user *user, int *len);
|
[NETFILTER]: Fix/improve deadlock condition on module removal netfilter
So I've had a deadlock reported to me. I've found that the sequence of
events goes like this:
1) process A (modprobe) runs to remove ip_tables.ko
2) process B (iptables-restore) runs and calls setsockopt on a netfilter socket,
increasing the ip_tables socket_ops use count
3) process A acquires a file lock on the file ip_tables.ko, calls remove_module
in the kernel, which in turn executes the ip_tables module cleanup routine,
which calls nf_unregister_sockopt
4) nf_unregister_sockopt, seeing that the use count is non-zero, puts the
calling process into uninterruptible sleep, expecting the process using the
socket option code to wake it up when it exits the kernel
4) the user of the socket option code (process B) in do_ipt_get_ctl, calls
ipt_find_table_lock, which in this case calls request_module to load
ip_tables_nat.ko
5) request_module forks a copy of modprobe (process C) to load the module and
blocks until modprobe exits.
6) Process C. forked by request_module process the dependencies of
ip_tables_nat.ko, of which ip_tables.ko is one.
7) Process C attempts to lock the request module and all its dependencies, it
blocks when it attempts to lock ip_tables.ko (which was previously locked in
step 3)
Theres not really any great permanent solution to this that I can see, but I've
developed a two part solution that corrects the problem
Part 1) Modifies the nf_sockopt registration code so that, instead of using a
use counter internal to the nf_sockopt_ops structure, we instead use a pointer
to the registering modules owner to do module reference counting when nf_sockopt
calls a modules set/get routine. This prevents the deadlock by preventing set 4
from happening.
Part 2) Enhances the modprobe utilty so that by default it preforms non-blocking
remove operations (the same way rmmod does), and add an option to explicity
request blocking operation. So if you select blocking operation in modprobe you
can still cause the above deadlock, but only if you explicity try (and since
root can do any old stupid thing it would like.... :) ).
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-09-11 17:28:26 +08:00
|
|
|
/* Use the module struct to lock set/get code in place */
|
|
|
|
|
struct module *owner;
|
2005-04-17 06:20:36 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Function to register/unregister hook points. */
|
2015-07-11 07:15:06 +08:00
|
|
|
int nf_register_net_hook(struct net *net, const struct nf_hook_ops *ops);
|
|
|
|
|
void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *ops);
|
|
|
|
|
int nf_register_net_hooks(struct net *net, const struct nf_hook_ops *reg,
|
|
|
|
|
unsigned int n);
|
|
|
|
|
void nf_unregister_net_hooks(struct net *net, const struct nf_hook_ops *reg,
|
|
|
|
|
unsigned int n);
|
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|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Functions to register get/setsockopt ranges (non-inclusive). You
|
|
|
|
|
need to check permissions yourself! */
|
|
|
|
|
int nf_register_sockopt(struct nf_sockopt_ops *reg);
|
|
|
|
|
void nf_unregister_sockopt(struct nf_sockopt_ops *reg);
|
|
|
|
|
|
2018-12-30 23:14:15 +08:00
|
|
|
#ifdef CONFIG_JUMP_LABEL
|
2012-02-24 15:31:31 +08:00
|
|
|
extern struct static_key nf_hooks_needed[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
|
2011-11-19 01:32:46 +08:00
|
|
|
#endif
|
|
|
|
|
|
2016-11-03 17:56:35 +08:00
|
|
|
int nf_hook_slow(struct sk_buff *skb, struct nf_hook_state *state,
|
2017-08-24 06:08:32 +08:00
|
|
|
const struct nf_hook_entries *e, unsigned int i);
|
2006-01-07 15:01:48 +08:00
|
|
|
|
2019-10-11 06:30:37 +08:00
|
|
|
void nf_hook_slow_list(struct list_head *head, struct nf_hook_state *state,
|
|
|
|
|
const struct nf_hook_entries *e);
|
2006-01-07 15:01:48 +08:00
|
|
|
/**
|
2016-11-03 17:56:12 +08:00
|
|
|
* nf_hook - call a netfilter hook
|
2015-05-14 00:19:36 +08:00
|
|
|
*
|
2006-01-07 15:01:48 +08:00
|
|
|
* Returns 1 if the hook has allowed the packet to pass. The function
|
|
|
|
|
* okfn must be invoked by the caller in this case. Any other return
|
|
|
|
|
* value indicates the packet has been consumed by the hook.
|
|
|
|
|
*/
|
2016-11-03 17:56:12 +08:00
|
|
|
static inline int nf_hook(u_int8_t pf, unsigned int hook, struct net *net,
|
|
|
|
|
struct sock *sk, struct sk_buff *skb,
|
|
|
|
|
struct net_device *indev, struct net_device *outdev,
|
|
|
|
|
int (*okfn)(struct net *, struct sock *, struct sk_buff *))
|
2006-01-07 15:01:48 +08:00
|
|
|
{
|
2017-12-03 07:58:47 +08:00
|
|
|
struct nf_hook_entries *hook_head = NULL;
|
2016-09-21 23:35:07 +08:00
|
|
|
int ret = 1;
|
2016-02-25 17:08:38 +08:00
|
|
|
|
2018-12-30 23:14:15 +08:00
|
|
|
#ifdef CONFIG_JUMP_LABEL
|
2016-02-25 17:08:38 +08:00
|
|
|
if (__builtin_constant_p(pf) &&
|
|
|
|
|
__builtin_constant_p(hook) &&
|
|
|
|
|
!static_key_false(&nf_hooks_needed[pf][hook]))
|
|
|
|
|
return 1;
|
|
|
|
|
#endif
|
|
|
|
|
|
2016-09-21 23:35:07 +08:00
|
|
|
rcu_read_lock();
|
2017-12-03 07:58:47 +08:00
|
|
|
switch (pf) {
|
|
|
|
|
case NFPROTO_IPV4:
|
|
|
|
|
hook_head = rcu_dereference(net->nf.hooks_ipv4[hook]);
|
|
|
|
|
break;
|
|
|
|
|
case NFPROTO_IPV6:
|
|
|
|
|
hook_head = rcu_dereference(net->nf.hooks_ipv6[hook]);
|
|
|
|
|
break;
|
|
|
|
|
case NFPROTO_ARP:
|
2017-12-07 23:28:26 +08:00
|
|
|
#ifdef CONFIG_NETFILTER_FAMILY_ARP
|
2018-09-24 20:10:04 +08:00
|
|
|
if (WARN_ON_ONCE(hook >= ARRAY_SIZE(net->nf.hooks_arp)))
|
|
|
|
|
break;
|
2017-12-03 07:58:47 +08:00
|
|
|
hook_head = rcu_dereference(net->nf.hooks_arp[hook]);
|
2017-12-07 23:28:26 +08:00
|
|
|
#endif
|
2017-12-03 07:58:47 +08:00
|
|
|
break;
|
|
|
|
|
case NFPROTO_BRIDGE:
|
2017-12-07 23:28:26 +08:00
|
|
|
#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
|
2017-12-03 07:58:47 +08:00
|
|
|
hook_head = rcu_dereference(net->nf.hooks_bridge[hook]);
|
2017-12-07 23:28:26 +08:00
|
|
|
#endif
|
2017-12-03 07:58:47 +08:00
|
|
|
break;
|
2017-12-07 23:28:25 +08:00
|
|
|
#if IS_ENABLED(CONFIG_DECNET)
|
2017-12-03 07:58:47 +08:00
|
|
|
case NFPROTO_DECNET:
|
|
|
|
|
hook_head = rcu_dereference(net->nf.hooks_decnet[hook]);
|
|
|
|
|
break;
|
2017-12-07 23:28:25 +08:00
|
|
|
#endif
|
2017-12-03 07:58:47 +08:00
|
|
|
default:
|
|
|
|
|
WARN_ON_ONCE(1);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
2016-09-21 23:35:07 +08:00
|
|
|
if (hook_head) {
|
2015-04-06 10:18:54 +08:00
|
|
|
struct nf_hook_state state;
|
2015-04-04 04:23:58 +08:00
|
|
|
|
2016-11-03 17:56:35 +08:00
|
|
|
nf_hook_state_init(&state, hook, pf, indev, outdev,
|
2016-11-03 17:56:12 +08:00
|
|
|
sk, net, okfn);
|
2016-09-21 23:35:02 +08:00
|
|
|
|
2017-08-24 06:08:32 +08:00
|
|
|
ret = nf_hook_slow(skb, &state, hook_head, 0);
|
2015-04-04 04:23:58 +08:00
|
|
|
}
|
2016-09-21 23:35:07 +08:00
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
|
|
return ret;
|
2006-01-07 15:01:48 +08:00
|
|
|
}
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Activate hook; either okfn or kfree_skb called, unless a hook
|
|
|
|
|
returns NF_STOLEN (in which case, it's up to the hook to deal with
|
|
|
|
|
the consequences).
|
|
|
|
|
|
|
|
|
|
Returns -ERRNO if packet dropped. Zero means queued, stolen or
|
|
|
|
|
accepted.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* RR:
|
|
|
|
|
> I don't want nf_hook to return anything because people might forget
|
|
|
|
|
> about async and trust the return value to mean "packet was ok".
|
|
|
|
|
|
|
|
|
|
AK:
|
|
|
|
|
Just document it clearly, then you can expect some sense from kernel
|
|
|
|
|
coders :)
|
|
|
|
|
*/
|
|
|
|
|
|
2009-06-13 10:13:26 +08:00
|
|
|
static inline int
|
2015-09-16 09:04:16 +08:00
|
|
|
NF_HOOK_COND(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk,
|
2015-04-06 10:19:04 +08:00
|
|
|
struct sk_buff *skb, struct net_device *in, struct net_device *out,
|
2015-09-16 09:04:18 +08:00
|
|
|
int (*okfn)(struct net *, struct sock *, struct sk_buff *),
|
|
|
|
|
bool cond)
|
2009-06-13 10:13:26 +08:00
|
|
|
{
|
2010-02-19 15:03:28 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (!cond ||
|
2016-11-03 17:56:12 +08:00
|
|
|
((ret = nf_hook(pf, hook, net, sk, skb, in, out, okfn)) == 1))
|
2015-09-16 09:04:18 +08:00
|
|
|
ret = okfn(net, sk, skb);
|
2009-06-13 10:13:26 +08:00
|
|
|
return ret;
|
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-06-13 10:13:26 +08:00
|
|
|
static inline int
|
2015-09-16 09:04:16 +08:00
|
|
|
NF_HOOK(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk, struct sk_buff *skb,
|
2009-06-13 10:13:26 +08:00
|
|
|
struct net_device *in, struct net_device *out,
|
2015-09-16 09:04:18 +08:00
|
|
|
int (*okfn)(struct net *, struct sock *, struct sk_buff *))
|
2009-06-13 10:13:26 +08:00
|
|
|
{
|
2016-11-03 17:56:12 +08:00
|
|
|
int ret = nf_hook(pf, hook, net, sk, skb, in, out, okfn);
|
|
|
|
|
if (ret == 1)
|
|
|
|
|
ret = okfn(net, sk, skb);
|
|
|
|
|
return ret;
|
2009-06-13 10:13:26 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2018-07-02 23:14:12 +08:00
|
|
|
static inline void
|
|
|
|
|
NF_HOOK_LIST(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk,
|
|
|
|
|
struct list_head *head, struct net_device *in, struct net_device *out,
|
|
|
|
|
int (*okfn)(struct net *, struct sock *, struct sk_buff *))
|
|
|
|
|
{
|
2019-10-11 06:30:37 +08:00
|
|
|
struct nf_hook_entries *hook_head = NULL;
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_JUMP_LABEL
|
|
|
|
|
if (__builtin_constant_p(pf) &&
|
|
|
|
|
__builtin_constant_p(hook) &&
|
|
|
|
|
!static_key_false(&nf_hooks_needed[pf][hook]))
|
|
|
|
|
return;
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
switch (pf) {
|
|
|
|
|
case NFPROTO_IPV4:
|
|
|
|
|
hook_head = rcu_dereference(net->nf.hooks_ipv4[hook]);
|
|
|
|
|
break;
|
|
|
|
|
case NFPROTO_IPV6:
|
|
|
|
|
hook_head = rcu_dereference(net->nf.hooks_ipv6[hook]);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
WARN_ON_ONCE(1);
|
|
|
|
|
break;
|
2018-07-02 23:14:12 +08:00
|
|
|
}
|
2019-10-11 06:30:37 +08:00
|
|
|
|
|
|
|
|
if (hook_head) {
|
|
|
|
|
struct nf_hook_state state;
|
|
|
|
|
|
|
|
|
|
nf_hook_state_init(&state, hook, pf, in, out, sk, net, okfn);
|
|
|
|
|
|
|
|
|
|
nf_hook_slow_list(head, &state, hook_head);
|
|
|
|
|
}
|
|
|
|
|
rcu_read_unlock();
|
2018-07-02 23:14:12 +08:00
|
|
|
}
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Call setsockopt() */
|
2020-07-23 14:08:54 +08:00
|
|
|
int nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, sockptr_t opt,
|
2009-10-01 07:12:20 +08:00
|
|
|
unsigned int len);
|
2008-10-08 17:35:00 +08:00
|
|
|
int nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
|
2005-04-17 06:20:36 +08:00
|
|
|
int *len);
|
2006-03-21 14:45:21 +08:00
|
|
|
|
2007-12-05 17:22:05 +08:00
|
|
|
struct flowi;
|
2007-12-05 17:26:33 +08:00
|
|
|
struct nf_queue_entry;
|
2007-12-05 17:24:48 +08:00
|
|
|
|
2017-11-28 04:55:14 +08:00
|
|
|
__sum16 nf_checksum(struct sk_buff *skb, unsigned int hook,
|
|
|
|
|
unsigned int dataoff, u_int8_t protocol,
|
|
|
|
|
unsigned short family);
|
2006-04-07 05:18:43 +08:00
|
|
|
|
2017-12-20 23:04:18 +08:00
|
|
|
__sum16 nf_checksum_partial(struct sk_buff *skb, unsigned int hook,
|
|
|
|
|
unsigned int dataoff, unsigned int len,
|
|
|
|
|
u_int8_t protocol, unsigned short family);
|
2017-11-28 05:29:52 +08:00
|
|
|
int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
|
|
|
|
|
bool strict, unsigned short family);
|
2017-11-28 05:50:26 +08:00
|
|
|
int nf_reroute(struct sk_buff *skb, struct nf_queue_entry *entry);
|
2008-03-20 22:15:53 +08:00
|
|
|
|
2006-01-07 15:06:30 +08:00
|
|
|
#include <net/flow.h>
|
2018-05-23 15:17:19 +08:00
|
|
|
|
|
|
|
|
struct nf_conn;
|
|
|
|
|
enum nf_nat_manip_type;
|
|
|
|
|
struct nlattr;
|
2018-05-23 15:17:24 +08:00
|
|
|
enum ip_conntrack_dir;
|
2018-05-23 15:17:19 +08:00
|
|
|
|
|
|
|
|
struct nf_nat_hook {
|
|
|
|
|
int (*parse_nat_setup)(struct nf_conn *ct, enum nf_nat_manip_type manip,
|
|
|
|
|
const struct nlattr *attr);
|
|
|
|
|
void (*decode_session)(struct sk_buff *skb, struct flowi *fl);
|
2018-05-23 15:17:24 +08:00
|
|
|
unsigned int (*manip_pkt)(struct sk_buff *skb, struct nf_conn *ct,
|
|
|
|
|
enum nf_nat_manip_type mtype,
|
|
|
|
|
enum ip_conntrack_dir dir);
|
2018-05-23 15:17:19 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
extern struct nf_nat_hook __rcu *nf_nat_hook;
|
2006-01-07 15:06:30 +08:00
|
|
|
|
|
|
|
|
static inline void
|
2008-10-08 17:35:00 +08:00
|
|
|
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
|
2006-01-07 15:06:30 +08:00
|
|
|
{
|
2019-03-27 16:22:26 +08:00
|
|
|
#if IS_ENABLED(CONFIG_NF_NAT)
|
2018-05-23 15:17:19 +08:00
|
|
|
struct nf_nat_hook *nat_hook;
|
2006-01-07 15:06:30 +08:00
|
|
|
|
2012-08-27 01:14:06 +08:00
|
|
|
rcu_read_lock();
|
2018-05-23 15:17:19 +08:00
|
|
|
nat_hook = rcu_dereference(nf_nat_hook);
|
2018-05-28 17:14:49 +08:00
|
|
|
if (nat_hook && nat_hook->decode_session)
|
2018-05-23 15:17:19 +08:00
|
|
|
nat_hook->decode_session(skb, fl);
|
2012-08-27 01:14:06 +08:00
|
|
|
rcu_read_unlock();
|
2006-01-07 15:06:30 +08:00
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
#else /* !CONFIG_NETFILTER */
|
2015-10-10 02:45:42 +08:00
|
|
|
static inline int
|
|
|
|
|
NF_HOOK_COND(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk,
|
|
|
|
|
struct sk_buff *skb, struct net_device *in, struct net_device *out,
|
|
|
|
|
int (*okfn)(struct net *, struct sock *, struct sk_buff *),
|
|
|
|
|
bool cond)
|
|
|
|
|
{
|
|
|
|
|
return okfn(net, sk, skb);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline int
|
|
|
|
|
NF_HOOK(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk,
|
|
|
|
|
struct sk_buff *skb, struct net_device *in, struct net_device *out,
|
|
|
|
|
int (*okfn)(struct net *, struct sock *, struct sk_buff *))
|
|
|
|
|
{
|
|
|
|
|
return okfn(net, sk, skb);
|
|
|
|
|
}
|
|
|
|
|
|
2018-07-02 23:14:12 +08:00
|
|
|
static inline void
|
|
|
|
|
NF_HOOK_LIST(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk,
|
|
|
|
|
struct list_head *head, struct net_device *in, struct net_device *out,
|
|
|
|
|
int (*okfn)(struct net *, struct sock *, struct sk_buff *))
|
|
|
|
|
{
|
|
|
|
|
/* nothing to do */
|
|
|
|
|
}
|
|
|
|
|
|
2015-09-16 09:04:16 +08:00
|
|
|
static inline int nf_hook(u_int8_t pf, unsigned int hook, struct net *net,
|
|
|
|
|
struct sock *sk, struct sk_buff *skb,
|
|
|
|
|
struct net_device *indev, struct net_device *outdev,
|
2015-09-16 09:04:18 +08:00
|
|
|
int (*okfn)(struct net *, struct sock *, struct sk_buff *))
|
2006-01-08 04:50:27 +08:00
|
|
|
{
|
2006-02-16 07:18:19 +08:00
|
|
|
return 1;
|
2006-01-08 04:50:27 +08:00
|
|
|
}
|
|
|
|
|
struct flowi;
|
2006-01-07 15:06:30 +08:00
|
|
|
static inline void
|
2008-10-08 17:35:00 +08:00
|
|
|
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
|
|
|
|
|
{
|
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
#endif /*CONFIG_NETFILTER*/
|
|
|
|
|
|
2019-09-13 16:13:11 +08:00
|
|
|
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
|
2015-09-03 07:26:07 +08:00
|
|
|
#include <linux/netfilter/nf_conntrack_zones_common.h>
|
|
|
|
|
|
2013-07-29 04:54:08 +08:00
|
|
|
extern void (*ip_ct_attach)(struct sk_buff *, const struct sk_buff *) __rcu;
|
2013-09-27 05:48:15 +08:00
|
|
|
void nf_ct_attach(struct sk_buff *, const struct sk_buff *);
|
2018-07-06 23:37:19 +08:00
|
|
|
struct nf_conntrack_tuple;
|
|
|
|
|
bool nf_ct_get_tuple_skb(struct nf_conntrack_tuple *dst_tuple,
|
|
|
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const struct sk_buff *skb);
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2015-10-01 05:53:44 +08:00
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#else
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static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
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2018-07-06 23:37:19 +08:00
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struct nf_conntrack_tuple;
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static inline bool nf_ct_get_tuple_skb(struct nf_conntrack_tuple *dst_tuple,
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const struct sk_buff *skb)
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{
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return false;
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}
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2015-10-01 05:53:44 +08:00
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#endif
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2012-06-07 18:13:39 +08:00
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struct nf_conn;
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2013-08-27 14:50:12 +08:00
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enum ip_conntrack_info;
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2018-05-23 15:17:12 +08:00
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|
|
|
|
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struct nf_ct_hook {
|
2018-05-23 15:17:24 +08:00
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|
int (*update)(struct net *net, struct sk_buff *skb);
|
2018-05-23 15:17:12 +08:00
|
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|
void (*destroy)(struct nf_conntrack *);
|
2018-07-06 23:37:19 +08:00
|
|
|
bool (*get_tuple_skb)(struct nf_conntrack_tuple *,
|
|
|
|
|
const struct sk_buff *);
|
2018-05-23 15:17:12 +08:00
|
|
|
};
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|
|
extern struct nf_ct_hook __rcu *nf_ct_hook;
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|
2012-06-07 18:13:39 +08:00
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|
|
struct nlattr;
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|
|
|
|
2015-10-05 10:47:13 +08:00
|
|
|
struct nfnl_ct_hook {
|
2012-06-07 18:13:39 +08:00
|
|
|
size_t (*build_size)(const struct nf_conn *ct);
|
2015-10-01 05:53:44 +08:00
|
|
|
int (*build)(struct sk_buff *skb, struct nf_conn *ct,
|
|
|
|
|
enum ip_conntrack_info ctinfo,
|
|
|
|
|
u_int16_t ct_attr, u_int16_t ct_info_attr);
|
2012-06-07 18:13:39 +08:00
|
|
|
int (*parse)(const struct nlattr *attr, struct nf_conn *ct);
|
2013-08-08 00:13:20 +08:00
|
|
|
int (*attach_expect)(const struct nlattr *attr, struct nf_conn *ct,
|
|
|
|
|
u32 portid, u32 report);
|
2012-06-07 19:31:25 +08:00
|
|
|
void (*seq_adjust)(struct sk_buff *skb, struct nf_conn *ct,
|
2013-08-27 14:50:12 +08:00
|
|
|
enum ip_conntrack_info ctinfo, s32 off);
|
2012-06-07 18:13:39 +08:00
|
|
|
};
|
2015-10-05 10:47:13 +08:00
|
|
|
extern struct nfnl_ct_hook __rcu *nfnl_ct_hook;
|
2007-03-24 02:17:07 +08:00
|
|
|
|
2015-07-14 23:51:07 +08:00
|
|
|
/**
|
|
|
|
|
* nf_skb_duplicated - TEE target has sent a packet
|
|
|
|
|
*
|
|
|
|
|
* When a xtables target sends a packet, the OUTPUT and POSTROUTING
|
|
|
|
|
* hooks are traversed again, i.e. nft and xtables are invoked recursively.
|
|
|
|
|
*
|
|
|
|
|
* This is used by xtables TEE target to prevent the duplicated skb from
|
|
|
|
|
* being duplicated again.
|
|
|
|
|
*/
|
|
|
|
|
DECLARE_PER_CPU(bool, nf_skb_duplicated);
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
#endif /*__LINUX_NETFILTER_H*/
|