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b24413180f
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>
395 lines
9.5 KiB
C
395 lines
9.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Operations on the network namespace
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*/
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#ifndef __NET_NET_NAMESPACE_H
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#define __NET_NET_NAMESPACE_H
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#include <linux/atomic.h>
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#include <linux/refcount.h>
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#include <linux/workqueue.h>
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#include <linux/list.h>
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#include <linux/sysctl.h>
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#include <net/flow.h>
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#include <net/netns/core.h>
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#include <net/netns/mib.h>
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#include <net/netns/unix.h>
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#include <net/netns/packet.h>
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#include <net/netns/ipv4.h>
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#include <net/netns/ipv6.h>
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#include <net/netns/ieee802154_6lowpan.h>
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#include <net/netns/sctp.h>
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#include <net/netns/dccp.h>
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#include <net/netns/netfilter.h>
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#include <net/netns/x_tables.h>
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#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
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#include <net/netns/conntrack.h>
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#endif
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#include <net/netns/nftables.h>
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#include <net/netns/xfrm.h>
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#include <net/netns/mpls.h>
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#include <net/netns/can.h>
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#include <linux/ns_common.h>
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#include <linux/idr.h>
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#include <linux/skbuff.h>
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struct user_namespace;
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struct proc_dir_entry;
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struct net_device;
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struct sock;
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struct ctl_table_header;
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struct net_generic;
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struct sock;
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struct netns_ipvs;
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#define NETDEV_HASHBITS 8
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#define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
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struct net {
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refcount_t passive; /* To decided when the network
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* namespace should be freed.
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*/
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atomic_t count; /* To decided when the network
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* namespace should be shut down.
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*/
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spinlock_t rules_mod_lock;
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atomic64_t cookie_gen;
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struct list_head list; /* list of network namespaces */
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struct list_head cleanup_list; /* namespaces on death row */
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struct list_head exit_list; /* Use only net_mutex */
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struct user_namespace *user_ns; /* Owning user namespace */
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struct ucounts *ucounts;
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spinlock_t nsid_lock;
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struct idr netns_ids;
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struct ns_common ns;
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struct proc_dir_entry *proc_net;
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struct proc_dir_entry *proc_net_stat;
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#ifdef CONFIG_SYSCTL
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struct ctl_table_set sysctls;
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#endif
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struct sock *rtnl; /* rtnetlink socket */
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struct sock *genl_sock;
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struct list_head dev_base_head;
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struct hlist_head *dev_name_head;
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struct hlist_head *dev_index_head;
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unsigned int dev_base_seq; /* protected by rtnl_mutex */
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int ifindex;
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unsigned int dev_unreg_count;
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/* core fib_rules */
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struct list_head rules_ops;
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struct list_head fib_notifier_ops; /* protected by net_mutex */
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struct net_device *loopback_dev; /* The loopback */
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struct netns_core core;
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struct netns_mib mib;
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struct netns_packet packet;
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struct netns_unix unx;
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struct netns_ipv4 ipv4;
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#if IS_ENABLED(CONFIG_IPV6)
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struct netns_ipv6 ipv6;
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#endif
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#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
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struct netns_ieee802154_lowpan ieee802154_lowpan;
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#endif
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#if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE)
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struct netns_sctp sctp;
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#endif
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#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
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struct netns_dccp dccp;
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#endif
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#ifdef CONFIG_NETFILTER
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struct netns_nf nf;
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struct netns_xt xt;
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#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
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struct netns_ct ct;
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#endif
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#if defined(CONFIG_NF_TABLES) || defined(CONFIG_NF_TABLES_MODULE)
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struct netns_nftables nft;
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#endif
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#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
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struct netns_nf_frag nf_frag;
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#endif
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struct sock *nfnl;
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struct sock *nfnl_stash;
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#if IS_ENABLED(CONFIG_NETFILTER_NETLINK_ACCT)
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struct list_head nfnl_acct_list;
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#endif
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#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
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struct list_head nfct_timeout_list;
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#endif
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#endif
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#ifdef CONFIG_WEXT_CORE
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struct sk_buff_head wext_nlevents;
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#endif
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struct net_generic __rcu *gen;
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/* Note : following structs are cache line aligned */
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#ifdef CONFIG_XFRM
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struct netns_xfrm xfrm;
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#endif
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#if IS_ENABLED(CONFIG_IP_VS)
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struct netns_ipvs *ipvs;
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#endif
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#if IS_ENABLED(CONFIG_MPLS)
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struct netns_mpls mpls;
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#endif
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#if IS_ENABLED(CONFIG_CAN)
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struct netns_can can;
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#endif
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struct sock *diag_nlsk;
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atomic_t fnhe_genid;
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} __randomize_layout;
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#include <linux/seq_file_net.h>
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/* Init's network namespace */
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extern struct net init_net;
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#ifdef CONFIG_NET_NS
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struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns,
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struct net *old_net);
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void net_ns_barrier(void);
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#else /* CONFIG_NET_NS */
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#include <linux/sched.h>
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#include <linux/nsproxy.h>
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static inline struct net *copy_net_ns(unsigned long flags,
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struct user_namespace *user_ns, struct net *old_net)
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{
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if (flags & CLONE_NEWNET)
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return ERR_PTR(-EINVAL);
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return old_net;
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}
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static inline void net_ns_barrier(void) {}
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#endif /* CONFIG_NET_NS */
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extern struct list_head net_namespace_list;
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struct net *get_net_ns_by_pid(pid_t pid);
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struct net *get_net_ns_by_fd(int fd);
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#ifdef CONFIG_SYSCTL
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void ipx_register_sysctl(void);
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void ipx_unregister_sysctl(void);
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#else
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#define ipx_register_sysctl()
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#define ipx_unregister_sysctl()
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#endif
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#ifdef CONFIG_NET_NS
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void __put_net(struct net *net);
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static inline struct net *get_net(struct net *net)
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{
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atomic_inc(&net->count);
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return net;
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}
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static inline struct net *maybe_get_net(struct net *net)
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{
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/* Used when we know struct net exists but we
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* aren't guaranteed a previous reference count
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* exists. If the reference count is zero this
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* function fails and returns NULL.
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*/
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if (!atomic_inc_not_zero(&net->count))
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net = NULL;
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return net;
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}
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static inline void put_net(struct net *net)
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{
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if (atomic_dec_and_test(&net->count))
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__put_net(net);
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}
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static inline
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int net_eq(const struct net *net1, const struct net *net2)
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{
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return net1 == net2;
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}
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void net_drop_ns(void *);
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#else
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static inline struct net *get_net(struct net *net)
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{
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return net;
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}
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static inline void put_net(struct net *net)
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{
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}
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static inline struct net *maybe_get_net(struct net *net)
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{
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return net;
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}
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static inline
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int net_eq(const struct net *net1, const struct net *net2)
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{
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return 1;
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}
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#define net_drop_ns NULL
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#endif
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typedef struct {
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#ifdef CONFIG_NET_NS
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struct net *net;
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#endif
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} possible_net_t;
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static inline void write_pnet(possible_net_t *pnet, struct net *net)
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{
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#ifdef CONFIG_NET_NS
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pnet->net = net;
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#endif
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}
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static inline struct net *read_pnet(const possible_net_t *pnet)
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{
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#ifdef CONFIG_NET_NS
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return pnet->net;
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#else
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return &init_net;
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#endif
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}
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#define for_each_net(VAR) \
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list_for_each_entry(VAR, &net_namespace_list, list)
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#define for_each_net_rcu(VAR) \
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list_for_each_entry_rcu(VAR, &net_namespace_list, list)
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#ifdef CONFIG_NET_NS
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#define __net_init
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#define __net_exit
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#define __net_initdata
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#define __net_initconst
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#else
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#define __net_init __init
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#define __net_exit __ref
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#define __net_initdata __initdata
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#define __net_initconst __initconst
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#endif
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int peernet2id_alloc(struct net *net, struct net *peer);
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int peernet2id(struct net *net, struct net *peer);
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bool peernet_has_id(struct net *net, struct net *peer);
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struct net *get_net_ns_by_id(struct net *net, int id);
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struct pernet_operations {
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struct list_head list;
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int (*init)(struct net *net);
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void (*exit)(struct net *net);
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void (*exit_batch)(struct list_head *net_exit_list);
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unsigned int *id;
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size_t size;
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};
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/*
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* Use these carefully. If you implement a network device and it
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* needs per network namespace operations use device pernet operations,
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* otherwise use pernet subsys operations.
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*
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* Network interfaces need to be removed from a dying netns _before_
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* subsys notifiers can be called, as most of the network code cleanup
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* (which is done from subsys notifiers) runs with the assumption that
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* dev_remove_pack has been called so no new packets will arrive during
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* and after the cleanup functions have been called. dev_remove_pack
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* is not per namespace so instead the guarantee of no more packets
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* arriving in a network namespace is provided by ensuring that all
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* network devices and all sockets have left the network namespace
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* before the cleanup methods are called.
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*
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* For the longest time the ipv4 icmp code was registered as a pernet
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* device which caused kernel oops, and panics during network
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* namespace cleanup. So please don't get this wrong.
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*/
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int register_pernet_subsys(struct pernet_operations *);
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void unregister_pernet_subsys(struct pernet_operations *);
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int register_pernet_device(struct pernet_operations *);
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void unregister_pernet_device(struct pernet_operations *);
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struct ctl_table;
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struct ctl_table_header;
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#ifdef CONFIG_SYSCTL
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int net_sysctl_init(void);
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struct ctl_table_header *register_net_sysctl(struct net *net, const char *path,
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struct ctl_table *table);
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void unregister_net_sysctl_table(struct ctl_table_header *header);
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#else
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static inline int net_sysctl_init(void) { return 0; }
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static inline struct ctl_table_header *register_net_sysctl(struct net *net,
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const char *path, struct ctl_table *table)
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{
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return NULL;
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}
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static inline void unregister_net_sysctl_table(struct ctl_table_header *header)
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{
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}
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#endif
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static inline int rt_genid_ipv4(struct net *net)
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{
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return atomic_read(&net->ipv4.rt_genid);
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}
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static inline void rt_genid_bump_ipv4(struct net *net)
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{
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atomic_inc(&net->ipv4.rt_genid);
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}
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extern void (*__fib6_flush_trees)(struct net *net);
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static inline void rt_genid_bump_ipv6(struct net *net)
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{
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if (__fib6_flush_trees)
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__fib6_flush_trees(net);
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}
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#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
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static inline struct netns_ieee802154_lowpan *
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net_ieee802154_lowpan(struct net *net)
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{
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return &net->ieee802154_lowpan;
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}
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#endif
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/* For callers who don't really care about whether it's IPv4 or IPv6 */
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static inline void rt_genid_bump_all(struct net *net)
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{
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rt_genid_bump_ipv4(net);
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rt_genid_bump_ipv6(net);
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}
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static inline int fnhe_genid(struct net *net)
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{
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return atomic_read(&net->fnhe_genid);
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}
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static inline void fnhe_genid_bump(struct net *net)
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{
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atomic_inc(&net->fnhe_genid);
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}
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#endif /* __NET_NET_NAMESPACE_H */
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