Repository : ssh://git@diktynna/batman-adv
On branch : master
commit a042622f361af134bcde6cb946b005789ac67281 Author: Sven Eckelmann sven@narfation.org Date: Mon Apr 13 19:52:29 2020 +0200
batman-adv: Drop support for Linux < 4.4
The Linux Kernel 3.16 reached its end of life [1] after 6 years. Instead it is recommended to use at least kernel 4.4. It is also already over 4 years old but still maintained by the stable kernel team. All older kernels (v3.16 - v4.3) should therefore be dropped to reduce the support overhead.
[1] https://lkml.kernel.org/r/lsq.1591898928.276150302@decadent.org.uk
Signed-off-by: Sven Eckelmann sven@narfation.org
a042622f361af134bcde6cb946b005789ac67281 Makefile | 2 - README.external.rst | 2 +- compat-include/linux/average.h | 3 - compat-include/linux/compiler.h | 15 --- compat-include/linux/if_bridge.h | 77 ------------ compat-include/linux/igmp.h | 8 +- compat-include/linux/list.h | 31 ----- compat-include/linux/netdevice.h | 15 --- compat-include/linux/nl80211.h | 23 ---- compat-include/linux/seq_file.h | 25 ---- compat-include/linux/skbuff.h | 20 --- compat-include/linux/string.h | 51 -------- compat-include/net/addrconf.h | 8 +- compat-include/net/cfg80211.h | 19 --- compat-include/net/ip6_checksum.h | 27 ---- compat-include/net/netlink.h | 28 ----- compat-include/uapi/linux/nl80211.h | 25 ---- compat-sources/Makefile | 8 -- compat-sources/net/core/skbuff.c | 195 ----------------------------- compat-sources/net/ipv4/igmp.c | 223 ---------------------------------- compat-sources/net/ipv6/mcast_snoop.c | 189 ---------------------------- compat.h | 13 -- 22 files changed, 5 insertions(+), 1002 deletions(-)
diff --git a/Makefile b/Makefile index b518db1f..afdbc03c 100644 --- a/Makefile +++ b/Makefile @@ -49,8 +49,6 @@ ifneq ($(REVISION),) NOSTDINC_FLAGS += -DBATADV_SOURCE_VERSION="$(REVISION)" endif
-include $(PWD)/compat-sources/Makefile - obj-y += net/batman-adv/
export batman-adv-y diff --git a/README.external.rst b/README.external.rst index d8465aa8..b4d07e64 100644 --- a/README.external.rst +++ b/README.external.rst @@ -12,7 +12,7 @@ and as external module. The external module allows to get new features without upgrading to a newer kernel version and to get batman-adv specific bugfixes for kernels that are not supported anymore. It compiles against and should work -with Linux 3.16 - 5.7. Supporting older versions is not +with Linux 4.4 - 5.7. Supporting older versions is not planned, but it's probably easy to backport it. If you work on a backport, feel free to contact us. :-)
diff --git a/compat-include/linux/average.h b/compat-include/linux/average.h index 046e9cb5..347fdeae 100644 --- a/compat-include/linux/average.h +++ b/compat-include/linux/average.h @@ -10,16 +10,13 @@ #ifndef _NET_BATMAN_ADV_COMPAT_LINUX_AVERAGE_H #define _NET_BATMAN_ADV_COMPAT_LINUX_AVERAGE_H
-#include <linux/version.h> #include_next <linux/average.h>
#include <linux/bug.h> #include <linux/compiler.h> #include <linux/log2.h>
-#if LINUX_VERSION_IS_GEQ(4, 3, 0) #undef DECLARE_EWMA -#endif /* LINUX_VERSION_IS_LESS(4, 3, 0) */
/* * Exponentially weighted moving average (EWMA) diff --git a/compat-include/linux/compiler.h b/compat-include/linux/compiler.h index 89ed2929..43e12a78 100644 --- a/compat-include/linux/compiler.h +++ b/compat-include/linux/compiler.h @@ -13,21 +13,6 @@ #include <linux/version.h> #include_next <linux/compiler.h>
-#if LINUX_VERSION_IS_LESS(3, 19, 0) - -#ifndef READ_ONCE -#define READ_ONCE(x) ACCESS_ONCE(x) -#endif - -#ifndef WRITE_ONCE -#define WRITE_ONCE(x, val) ({ \ - ACCESS_ONCE(x) = (val); \ -}) -#endif - -#endif /* LINUX_VERSION_IS_LESS(3, 19, 0) */ - - #if LINUX_VERSION_IS_LESS(5, 4, 0)
#ifndef fallthrough diff --git a/compat-include/linux/if_bridge.h b/compat-include/linux/if_bridge.h deleted file mode 100644 index 8dfcef19..00000000 --- a/compat-include/linux/if_bridge.h +++ /dev/null @@ -1,77 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This file contains macros for maintaining compatibility with older versions - * of the Linux kernel. - */ - -#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_IF_BRIDGE_H_ -#define _NET_BATMAN_ADV_COMPAT_LINUX_IF_BRIDGE_H_ - -#include <linux/version.h> -#include_next <linux/if_bridge.h> - -#if LINUX_VERSION_IS_LESS(3, 16, 0) - -struct br_ip { - union { - __be32 ip4; -#if IS_ENABLED(CONFIG_IPV6) - struct in6_addr ip6; -#endif - } u; - __be16 proto; - __u16 vid; -}; - -struct br_ip_list { - struct list_head list; - struct br_ip addr; -}; - -#endif /* LINUX_VERSION_IS_LESS(3, 16, 0) */ - -#if LINUX_VERSION_IS_LESS(3, 16, 0) || \ - LINUX_VERSION_CODE == KERNEL_VERSION(3, 16, 0) && \ - (!IS_ENABLED(CONFIG_BRIDGE) || \ - !IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)) - -#define br_multicast_list_adjacent(dev, br_ip_list) \ - batadv_br_multicast_list_adjacent(dev, br_ip_list) - -#define br_multicast_has_querier_adjacent(dev, proto) \ - batadv_br_multicast_has_querier_adjacent(dev, proto) - -static inline int -batadv_br_multicast_list_adjacent(struct net_device *dev, - struct list_head *br_ip_list) -{ - return 0; -} - -static inline bool -batadv_br_multicast_has_querier_adjacent(struct net_device *dev, int proto) -{ - return false; -} - -#endif /* LINUX_VERSION_IS_LESS(3, 16, 0) || - * == KERNEL_VERSION(3, 16, 0) && - * (!IS_ENABLED(CONFIG_BRIDGE) || - * !IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)) */ - -#if LINUX_VERSION_IS_LESS(3, 17, 0) - -static inline bool br_multicast_has_querier_anywhere(struct net_device *dev, - int proto) -{ - pr_warn_once("Old kernel detected (< 3.17) - multicast optimizations disabled\n"); - - return false; -} - -#endif /* LINUX_VERSION_IS_LESS(3, 17, 0) */ - -#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_IF_BRIDGE_H_ */ diff --git a/compat-include/linux/igmp.h b/compat-include/linux/igmp.h index 9875d6d4..cea5bfe9 100644 --- a/compat-include/linux/igmp.h +++ b/compat-include/linux/igmp.h @@ -13,11 +13,7 @@ #include <linux/version.h> #include_next <linux/igmp.h>
-#if LINUX_VERSION_IS_LESS(4, 2, 0) - -int ip_mc_check_igmp(struct sk_buff *skb); - -#elif LINUX_VERSION_IS_LESS(5, 1, 0) +#if LINUX_VERSION_IS_LESS(5, 1, 0)
static inline int batadv_ip_mc_check_igmp(struct sk_buff *skb) { @@ -27,6 +23,6 @@ static inline int batadv_ip_mc_check_igmp(struct sk_buff *skb) #define ip_mc_check_igmp(skb) \ batadv_ip_mc_check_igmp(skb)
-#endif /* LINUX_VERSION_IS_LESS(4, 2, 0) */ +#endif /* LINUX_VERSION_IS_LESS(5, 1, 0) */
#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_IGMP_H_ */ diff --git a/compat-include/linux/list.h b/compat-include/linux/list.h deleted file mode 100644 index 1bd85d0d..00000000 --- a/compat-include/linux/list.h +++ /dev/null @@ -1,31 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This file contains macros for maintaining compatibility with older versions - * of the Linux kernel. - */ - -#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_LIST_H_ -#define _NET_BATMAN_ADV_COMPAT_LINUX_LIST_H_ - -#include <linux/version.h> -#include_next <linux/list.h> - -#if LINUX_VERSION_IS_LESS(3, 17, 0) - -#define hlist_add_behind(n, prev) hlist_add_after(prev, n) - -#endif /* LINUX_VERSION_IS_LESS(3, 17, 0) */ - -#if LINUX_VERSION_IS_LESS(4, 3, 0) - -static inline bool hlist_fake(struct hlist_node *h) -{ - return h->pprev == &h->next; -} - -#endif /* LINUX_VERSION_IS_LESS(4, 3, 0) */ - -#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_LIST_H_ */ diff --git a/compat-include/linux/netdevice.h b/compat-include/linux/netdevice.h index ae7fb906..5dd27341 100644 --- a/compat-include/linux/netdevice.h +++ b/compat-include/linux/netdevice.h @@ -13,21 +13,6 @@ #include <linux/version.h> #include_next <linux/netdevice.h>
-#if LINUX_VERSION_IS_LESS(3, 17, 0) - -/* alloc_netdev() was defined differently before 2.6.38 */ -#undef alloc_netdev -#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ - alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) - -#endif /* LINUX_VERSION_IS_LESS(3, 17, 0) */ - -#if LINUX_VERSION_IS_LESS(4, 1, 0) - -#define dev_get_iflink(_net_dev) ((_net_dev)->iflink) - -#endif /* LINUX_VERSION_IS_LESS(3, 19, 0) */ - #if LINUX_VERSION_IS_LESS(4, 5, 0)
#define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info, extack) \ diff --git a/compat-include/linux/nl80211.h b/compat-include/linux/nl80211.h deleted file mode 100644 index bea92d1b..00000000 --- a/compat-include/linux/nl80211.h +++ /dev/null @@ -1,23 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This file contains macros for maintaining compatibility with older versions - * of the Linux kernel. - */ - -#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_NL80211_H_ -#define _NET_BATMAN_ADV_COMPAT_LINUX_NL80211_H_ - -#include <linux/version.h> -#include_next <linux/nl80211.h> - -#if LINUX_VERSION_IS_LESS(3, 16, 0) - -/* Linux 3.15 misses the uapi include.... */ -#include <uapi/linux/nl80211.h> - -#endif /* LINUX_VERSION_IS_LESS(3, 16, 0) */ - -#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_NL80211_H_ */ diff --git a/compat-include/linux/seq_file.h b/compat-include/linux/seq_file.h deleted file mode 100644 index 74854f56..00000000 --- a/compat-include/linux/seq_file.h +++ /dev/null @@ -1,25 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This file contains macros for maintaining compatibility with older versions - * of the Linux kernel. - */ - -#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_SEQ_FILE_H_ -#define _NET_BATMAN_ADV_COMPAT_LINUX_SEQ_FILE_H_ - -#include <linux/version.h> -#include_next <linux/seq_file.h> - -#if LINUX_VERSION_IS_LESS(3, 19, 0) - -static inline bool seq_has_overflowed(struct seq_file *m) -{ - return m->count == m->size; -} - -#endif /* LINUX_VERSION_IS_LESS(3, 19, 0) */ - -#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_SEQ_FILE_H_ */ diff --git a/compat-include/linux/skbuff.h b/compat-include/linux/skbuff.h index e92f3422..0d3631d2 100644 --- a/compat-include/linux/skbuff.h +++ b/compat-include/linux/skbuff.h @@ -13,26 +13,6 @@ #include <linux/version.h> #include_next <linux/skbuff.h>
-#if LINUX_VERSION_IS_LESS(3, 16, 0) - -#define pskb_copy_for_clone pskb_copy - -__sum16 skb_checksum_simple_validate(struct sk_buff *skb); - -__sum16 -skb_checksum_validate(struct sk_buff *skb, int proto, - __wsum (*compute_pseudo)(struct sk_buff *skb, int proto)); - -#endif /* LINUX_VERSION_IS_LESS(3, 16, 0) */ - -#if LINUX_VERSION_IS_LESS(4, 2, 0) - -struct sk_buff *skb_checksum_trimmed(struct sk_buff *skb, - unsigned int transport_len, - __sum16(*skb_chkf)(struct sk_buff *skb)); - -#endif /* LINUX_VERSION_IS_LESS(4, 2, 0) */ - #if LINUX_VERSION_IS_LESS(4, 5, 0)
static inline void batadv_skb_postpush_rcsum(struct sk_buff *skb, diff --git a/compat-include/linux/string.h b/compat-include/linux/string.h deleted file mode 100644 index 71978031..00000000 --- a/compat-include/linux/string.h +++ /dev/null @@ -1,51 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2015 Chris Metcalf cmetcalf@ezchip.com - * - * This file contains macros for maintaining compatibility with older versions - * of the Linux kernel. - */ - -#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_STRING_H_ -#define _NET_BATMAN_ADV_COMPAT_LINUX_STRING_H_ - -#include <linux/version.h> -#include_next <linux/string.h> -#include <asm-generic/errno-base.h> - -#if LINUX_VERSION_IS_LESS(4, 3, 0) - -#ifndef __HAVE_ARCH_STRSCPY - -static inline ssize_t batadv_strscpy(char *dest, const char *src, size_t count) -{ - long res = 0; - - if (count == 0) - return -E2BIG; - - while (count) { - char c; - - c = src[res]; - dest[res] = c; - if (!c) - return res; - res++; - count--; - } - - /* Hit buffer length without finding a NUL; force NUL-termination. */ - if (res) - dest[res-1] = '\0'; - - return -E2BIG; -} - -#define strscpy(_dest, _src, _count) \ - batadv_strscpy((_dest), (_src), (_count)) - -#endif - -#endif /* LINUX_VERSION_IS_LESS(4, 3, 0) */ - -#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_STRING_H_ */ diff --git a/compat-include/net/addrconf.h b/compat-include/net/addrconf.h index 5430811a..8914a66b 100644 --- a/compat-include/net/addrconf.h +++ b/compat-include/net/addrconf.h @@ -13,11 +13,7 @@ #include <linux/version.h> #include_next <net/addrconf.h>
-#if LINUX_VERSION_IS_LESS(4, 2, 0) - -int ipv6_mc_check_mld(struct sk_buff *skb); - -#elif LINUX_VERSION_IS_LESS(5, 1, 0) +#if LINUX_VERSION_IS_LESS(5, 1, 0)
static inline int batadv_ipv6_mc_check_mld(struct sk_buff *skb) { @@ -27,6 +23,6 @@ static inline int batadv_ipv6_mc_check_mld(struct sk_buff *skb) #define ipv6_mc_check_mld(skb) \ batadv_ipv6_mc_check_mld(skb)
-#endif /* LINUX_VERSION_IS_LESS(4, 2, 0) */ +#endif /* LINUX_VERSION_IS_LESS(5, 1, 0) */
#endif /* _NET_BATMAN_ADV_COMPAT_NET_ADDRCONF_H_ */ diff --git a/compat-include/net/cfg80211.h b/compat-include/net/cfg80211.h index 241f44e0..288c1be1 100644 --- a/compat-include/net/cfg80211.h +++ b/compat-include/net/cfg80211.h @@ -13,25 +13,6 @@ #include <linux/version.h> #include_next <net/cfg80211.h>
-#if LINUX_VERSION_IS_LESS(3, 16, 0) - -static inline int cfg80211_get_station(struct net_device *dev, - const u8 *mac_addr, - struct station_info *sinfo) -{ - pr_warn_once("cfg80211 based throughput metric is only supported with Linux 3.16+\n"); - return -ENOENT; -} - -/* The following define substitutes the expected_throughput field with a random - * one existing in the station_info struct. It can be random because due to the - * function above it will never be used. Only needed to make the code compile - */ -#define expected_throughput filled - -#endif /* LINUX_VERSION_IS_LESS(3, 16, 0) */ - - #if LINUX_VERSION_IS_LESS(4, 8, 0)
#if !IS_ENABLED(CONFIG_CFG80211) && \ diff --git a/compat-include/net/ip6_checksum.h b/compat-include/net/ip6_checksum.h deleted file mode 100644 index 8997cbf9..00000000 --- a/compat-include/net/ip6_checksum.h +++ /dev/null @@ -1,27 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This file contains macros for maintaining compatibility with older versions - * of the Linux kernel. - */ - -#ifndef _NET_BATMAN_ADV_COMPAT_NET_IP6_CHECKSUM_H_ -#define _NET_BATMAN_ADV_COMPAT_NET_IP6_CHECKSUM_H_ - -#include <linux/version.h> -#include_next <net/ip6_checksum.h> - -#if LINUX_VERSION_IS_LESS(3, 16, 0) - -static inline __wsum ip6_compute_pseudo(struct sk_buff *skb, int proto) -{ - return ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, - &ipv6_hdr(skb)->daddr, - skb->len, proto, 0)); -} - -#endif /* LINUX_VERSION_IS_LESS(3, 16, 0) */ - -#endif /* _NET_BATMAN_ADV_COMPAT_NET_IP6_CHECKSUM_H_ */ diff --git a/compat-include/net/netlink.h b/compat-include/net/netlink.h deleted file mode 100644 index c7419e15..00000000 --- a/compat-include/net/netlink.h +++ /dev/null @@ -1,28 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This file contains macros for maintaining compatibility with older versions - * of the Linux kernel. - */ - -#ifndef _NET_BATMAN_ADV_COMPAT_NET_NETLINK_H_ -#define _NET_BATMAN_ADV_COMPAT_NET_NETLINK_H_ - -#include <linux/version.h> -#include_next <net/netlink.h> - -#if LINUX_VERSION_IS_LESS(4, 1, 0) - -static inline int nla_put_in_addr(struct sk_buff *skb, int attrtype, - __be32 addr) -{ - __be32 tmp = addr; - - return nla_put_be32(skb, attrtype, tmp); -} - -#endif /* LINUX_VERSION_IS_LESS(4, 1, 0) */ - -#endif /* _NET_BATMAN_ADV_COMPAT_NET_NETLINK_H_ */ diff --git a/compat-include/uapi/linux/nl80211.h b/compat-include/uapi/linux/nl80211.h deleted file mode 100644 index dff0dd5c..00000000 --- a/compat-include/uapi/linux/nl80211.h +++ /dev/null @@ -1,25 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: - * - * Marek Lindner, Simon Wunderlich - * - * This file contains macros for maintaining compatibility with older versions - * of the Linux kernel. - */ - -#ifndef _NET_BATMAN_ADV_COMPAT_UAPI_LINUX_NL80211_H_ -#define _NET_BATMAN_ADV_COMPAT_UAPI_LINUX_NL80211_H_ - -#include <linux/version.h> -#include_next <uapi/linux/nl80211.h> - -#if LINUX_VERSION_IS_LESS(4, 0, 0) - -/* for batadv_v_elp_get_throughput which would have used - * STATION_INFO_EXPECTED_THROUGHPUT in Linux 4.0.0 - */ -#define NL80211_STA_INFO_EXPECTED_THROUGHPUT 28 - -#endif /* LINUX_VERSION_IS_LESS(4, 0, 0) */ - -#endif /* _NET_BATMAN_ADV_COMPAT_UAPI_LINUX_NL80211_H_ */ diff --git a/compat-sources/Makefile b/compat-sources/Makefile deleted file mode 100644 index fd2fce8f..00000000 --- a/compat-sources/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# Copyright (C) 2007-2020 B.A.T.M.A.N. contributors: -# -# Marek Lindner, Simon Wunderlich - -batman-adv-$(CONFIG_BATMAN_ADV_MCAST) += ../../compat-sources/net/core/skbuff.o -batman-adv-$(CONFIG_BATMAN_ADV_MCAST) += ../../compat-sources/net/ipv4/igmp.o -batman-adv-$(CONFIG_BATMAN_ADV_MCAST) += ../../compat-sources/net/ipv6/mcast_snoop.o diff --git a/compat-sources/net/core/skbuff.c b/compat-sources/net/core/skbuff.c deleted file mode 100644 index fd2771ae..00000000 --- a/compat-sources/net/core/skbuff.c +++ /dev/null @@ -1,195 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Routines having to do with the 'struct sk_buff' memory handlers. - * - * Authors: Alan Cox alan@lxorguk.ukuu.org.uk - * Florian La Roche rzsfl@rz.uni-sb.de - * - * Fixes: - * Alan Cox : Fixed the worst of the load - * balancer bugs. - * Dave Platt : Interrupt stacking fix. - * Richard Kooijman : Timestamp fixes. - * Alan Cox : Changed buffer format. - * Alan Cox : destructor hook for AF_UNIX etc. - * Linus Torvalds : Better skb_clone. - * Alan Cox : Added skb_copy. - * Alan Cox : Added all the changed routines Linus - * only put in the headers - * Ray VanTassle : Fixed --skb->lock in free - * Alan Cox : skb_copy copy arp field - * Andi Kleen : slabified it. - * Robert Olsson : Removed skb_head_pool - * - * NOTE: - * The __skb_ routines should be called with interrupts - * disabled, or you better be *real* sure that the operation is atomic - * with respect to whatever list is being frobbed (e.g. via lock_sock() - * or via disabling bottom half handlers, etc). - */ - -#include <linux/in6.h> -#include <linux/ipv6.h> -#include <linux/skbuff.h> -#include <linux/types.h> -#include <net/checksum.h> -#include <net/ip6_checksum.h> - -#if LINUX_VERSION_IS_LESS(3, 16, 0) - -/* Compare with: - * "bridge: multicast: call skb_checksum_{simple_, }validate" - */ -__sum16 skb_checksum_simple_validate(struct sk_buff *skb) -{ - switch (skb->ip_summed) { - case CHECKSUM_COMPLETE: - if (!csum_fold(skb->csum)) - break; - fallthrough; - case CHECKSUM_NONE: - skb->csum = 0; - return skb_checksum_complete(skb); - } - - return 0; -} - -/* Watch out: Not as generic as upstream - * - redefines this method to only fit with ICMPV6 - * - * Compare with: - * "bridge: multicast: call skb_checksum_{simple_, }validate" - */ -__sum16 -skb_checksum_validate(struct sk_buff *skb, int proto, - __wsum (*compute_pseudo)(struct sk_buff *skb, int proto)) -{ - const struct ipv6hdr *ip6h = ipv6_hdr(skb); - - switch (skb->ip_summed) { - case CHECKSUM_COMPLETE: - if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, skb->len, - IPPROTO_ICMPV6, skb->csum)) - break; - fallthrough; - case CHECKSUM_NONE: - skb->csum = ~csum_unfold(csum_ipv6_magic(&ip6h->saddr, - &ip6h->daddr, - skb->len, - IPPROTO_ICMPV6, 0)); - return __skb_checksum_complete(skb); - } - - return 0; -} - -#endif /* LINUX_VERSION_IS_LESS(3, 16, 0) */ - -#if LINUX_VERSION_IS_LESS(4, 2, 0) - -/** - * skb_push_rcsum - push skb and update receive checksum - * @skb: buffer to update - * @len: length of data pulled - * - * This function performs an skb_push on the packet and updates - * the CHECKSUM_COMPLETE checksum. It should be used on - * receive path processing instead of skb_push unless you know - * that the checksum difference is zero (e.g., a valid IP header) - * or you are setting ip_summed to CHECKSUM_NONE. - */ -static unsigned char *skb_push_rcsum(struct sk_buff *skb, unsigned len) -{ - skb_push(skb, len); - skb_postpush_rcsum(skb, skb->data, len); - return skb->data; -} - -/** - * skb_checksum_maybe_trim - maybe trims the given skb - * @skb: the skb to check - * @transport_len: the data length beyond the network header - * - * Checks whether the given skb has data beyond the given transport length. - * If so, returns a cloned skb trimmed to this transport length. - * Otherwise returns the provided skb. Returns NULL in error cases - * (e.g. transport_len exceeds skb length or out-of-memory). - * - * Caller needs to set the skb transport header and release the returned skb. - * Provided skb is consumed. - */ -static struct sk_buff *skb_checksum_maybe_trim(struct sk_buff *skb, - unsigned int transport_len) -{ - struct sk_buff *skb_chk; - unsigned int len = skb_transport_offset(skb) + transport_len; - int ret; - - if (skb->len < len) { - kfree_skb(skb); - return NULL; - } else if (skb->len == len) { - return skb; - } - - skb_chk = skb_clone(skb, GFP_ATOMIC); - kfree_skb(skb); - - if (!skb_chk) - return NULL; - - ret = pskb_trim_rcsum(skb_chk, len); - if (ret) { - kfree_skb(skb_chk); - return NULL; - } - - return skb_chk; -} - -/** - * skb_checksum_trimmed - validate checksum of an skb - * @skb: the skb to check - * @transport_len: the data length beyond the network header - * @skb_chkf: checksum function to use - * - * Applies the given checksum function skb_chkf to the provided skb. - * Returns a checked and maybe trimmed skb. Returns NULL on error. - * - * If the skb has data beyond the given transport length, then a - * trimmed & cloned skb is checked and returned. - * - * Caller needs to set the skb transport header and release the returned skb. - * Provided skb is consumed. - */ -struct sk_buff *skb_checksum_trimmed(struct sk_buff *skb, - unsigned int transport_len, - __sum16(*skb_chkf)(struct sk_buff *skb)) -{ - struct sk_buff *skb_chk; - unsigned int offset = skb_transport_offset(skb); - __sum16 ret; - - skb_chk = skb_checksum_maybe_trim(skb, transport_len); - if (!skb_chk) - return NULL; - - if (!pskb_may_pull(skb_chk, offset)) { - kfree_skb(skb_chk); - return NULL; - } - - skb_pull_rcsum(skb_chk, offset); - ret = skb_chkf(skb_chk); - skb_push_rcsum(skb_chk, offset); - - if (ret) { - kfree_skb(skb_chk); - return NULL; - } - - return skb_chk; -} - -#endif /* LINUX_VERSION_IS_LESS(4, 2, 0) */ diff --git a/compat-sources/net/ipv4/igmp.c b/compat-sources/net/ipv4/igmp.c deleted file mode 100644 index 6c639676..00000000 --- a/compat-sources/net/ipv4/igmp.c +++ /dev/null @@ -1,223 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Linux NET3: Internet Group Management Protocol [IGMP] - * - * This code implements the IGMP protocol as defined in RFC1112. There has - * been a further revision of this protocol since which is now supported. - * - * If you have trouble with this module be careful what gcc you have used, - * the older version didn't come out right using gcc 2.5.8, the newer one - * seems to fall out with gcc 2.6.2. - * - * Authors: - * Alan Cox alan@lxorguk.ukuu.org.uk - * - * Fixes: - * - * Alan Cox : Added lots of __inline__ to optimise - * the memory usage of all the tiny little - * functions. - * Alan Cox : Dumped the header building experiment. - * Alan Cox : Minor tweaks ready for multicast routing - * and extended IGMP protocol. - * Alan Cox : Removed a load of inline directives. Gcc 2.5.8 - * writes utterly bogus code otherwise (sigh) - * fixed IGMP loopback to behave in the manner - * desired by mrouted, fixed the fact it has been - * broken since 1.3.6 and cleaned up a few minor - * points. - * - * Chih-Jen Chang : Tried to revise IGMP to Version 2 - * Tsu-Sheng Tsao E-mail: chihjenc@scf.usc.edu and tsusheng@scf.usc.edu - * The enhancements are mainly based on Steve Deering's - * ipmulti-3.5 source code. - * Chih-Jen Chang : Added the igmp_get_mrouter_info and - * Tsu-Sheng Tsao igmp_set_mrouter_info to keep track of - * the mrouted version on that device. - * Chih-Jen Chang : Added the max_resp_time parameter to - * Tsu-Sheng Tsao igmp_heard_query(). Using this parameter - * to identify the multicast router version - * and do what the IGMP version 2 specified. - * Chih-Jen Chang : Added a timer to revert to IGMP V2 router - * Tsu-Sheng Tsao if the specified time expired. - * Alan Cox : Stop IGMP from 0.0.0.0 being accepted. - * Alan Cox : Use GFP_ATOMIC in the right places. - * Christian Daudt : igmp timer wasn't set for local group - * memberships but was being deleted, - * which caused a "del_timer() called - * from %p with timer not initialized\n" - * message (960131). - * Christian Daudt : removed del_timer from - * igmp_timer_expire function (960205). - * Christian Daudt : igmp_heard_report now only calls - * igmp_timer_expire if tm->running is - * true (960216). - * Malcolm Beattie : ttl comparison wrong in igmp_rcv made - * igmp_heard_query never trigger. Expiry - * miscalculation fixed in igmp_heard_query - * and random() made to return unsigned to - * prevent negative expiry times. - * Alexey Kuznetsov: Wrong group leaving behaviour, backport - * fix from pending 2.1.x patches. - * Alan Cox: Forget to enable FDDI support earlier. - * Alexey Kuznetsov: Fixed leaving groups on device down. - * Alexey Kuznetsov: Accordance to igmp-v2-06 draft. - * David L Stevens: IGMPv3 support, with help from - * Vinay Kulkarni - */ - -#include <linux/igmp.h> -#include <linux/ip.h> -#include <linux/skbuff.h> -#include <net/ip.h> - -#if LINUX_VERSION_IS_LESS(4, 2, 0) - -static int ip_mc_check_iphdr(struct sk_buff *skb) -{ - const struct iphdr *iph; - unsigned int len; - unsigned int offset = skb_network_offset(skb) + sizeof(*iph); - - if (!pskb_may_pull(skb, offset)) - return -EINVAL; - - iph = ip_hdr(skb); - - if (iph->version != 4 || ip_hdrlen(skb) < sizeof(*iph)) - return -EINVAL; - - offset += ip_hdrlen(skb) - sizeof(*iph); - - if (!pskb_may_pull(skb, offset)) - return -EINVAL; - - iph = ip_hdr(skb); - - if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl))) - return -EINVAL; - - len = skb_network_offset(skb) + ntohs(iph->tot_len); - if (skb->len < len || len < offset) - return -EINVAL; - - skb_set_transport_header(skb, offset); - - return 0; -} - -static int ip_mc_check_igmp_reportv3(struct sk_buff *skb) -{ - unsigned int len = skb_transport_offset(skb); - - len += sizeof(struct igmpv3_report); - - return pskb_may_pull(skb, len) ? 0 : -EINVAL; -} - -static int ip_mc_check_igmp_query(struct sk_buff *skb) -{ - unsigned int len = skb_transport_offset(skb); - - len += sizeof(struct igmphdr); - if (skb->len < len) - return -EINVAL; - - /* IGMPv{1,2}? */ - if (skb->len != len) { - /* or IGMPv3? */ - len += sizeof(struct igmpv3_query) - sizeof(struct igmphdr); - if (skb->len < len || !pskb_may_pull(skb, len)) - return -EINVAL; - } - - /* RFC2236+RFC3376 (IGMPv2+IGMPv3) require the multicast link layer - * all-systems destination addresses (224.0.0.1) for general queries - */ - if (!igmp_hdr(skb)->group && - ip_hdr(skb)->daddr != htonl(INADDR_ALLHOSTS_GROUP)) - return -EINVAL; - - return 0; -} - -static int ip_mc_check_igmp_msg(struct sk_buff *skb) -{ - switch (igmp_hdr(skb)->type) { - case IGMP_HOST_LEAVE_MESSAGE: - case IGMP_HOST_MEMBERSHIP_REPORT: - case IGMPV2_HOST_MEMBERSHIP_REPORT: - /* fall through */ - return 0; - case IGMPV3_HOST_MEMBERSHIP_REPORT: - return ip_mc_check_igmp_reportv3(skb); - case IGMP_HOST_MEMBERSHIP_QUERY: - return ip_mc_check_igmp_query(skb); - default: - return -ENOMSG; - } -} - -static inline __sum16 ip_mc_validate_checksum(struct sk_buff *skb) -{ - return skb_checksum_simple_validate(skb); -} - -static int __ip_mc_check_igmp(struct sk_buff *skb) - -{ - struct sk_buff *skb_chk; - unsigned int transport_len; - unsigned int len = skb_transport_offset(skb) + sizeof(struct igmphdr); - int ret; - - transport_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb); - - skb_get(skb); - skb_chk = skb_checksum_trimmed(skb, transport_len, - ip_mc_validate_checksum); - if (!skb_chk) - return -EINVAL; - - if (!pskb_may_pull(skb_chk, len)) { - kfree_skb(skb_chk); - return -EINVAL; - } - - ret = ip_mc_check_igmp_msg(skb_chk); - if (ret) { - kfree_skb(skb_chk); - return ret; - } - - kfree_skb(skb_chk); - - return 0; -} - -/** - * ip_mc_check_igmp - checks whether this is a sane IGMP packet - * @skb: the skb to validate - * - * Checks whether an IPv4 packet is a valid IGMP packet. If so sets - * skb network and transport headers accordingly and returns zero. - * - * -EINVAL: A broken packet was detected, i.e. it violates some internet - * standard - * -ENOMSG: IP header validation succeeded but it is not an IGMP packet. - * -ENOMEM: A memory allocation failure happened. - */ -int ip_mc_check_igmp(struct sk_buff *skb) -{ - int ret = ip_mc_check_iphdr(skb); - - if (ret < 0) - return ret; - - if (ip_hdr(skb)->protocol != IPPROTO_IGMP) - return -ENOMSG; - - return __ip_mc_check_igmp(skb); -} - -#endif /* LINUX_VERSION_IS_LESS(4, 2, 0) */ diff --git a/compat-sources/net/ipv6/mcast_snoop.c b/compat-sources/net/ipv6/mcast_snoop.c deleted file mode 100644 index 651b8e3b..00000000 --- a/compat-sources/net/ipv6/mcast_snoop.c +++ /dev/null @@ -1,189 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright (C) 2010: YOSHIFUJI Hideaki yoshfuji@linux-ipv6.org - * Copyright (C) 2015: Linus L��ssing linus.luessing@c0d3.blue - * - * Based on the MLD support added to br_multicast.c by YOSHIFUJI Hideaki. - */ - -#include <linux/skbuff.h> -#include <net/ipv6.h> -#include <net/mld.h> -#include <net/addrconf.h> -#include <net/ip6_checksum.h> - -#if LINUX_VERSION_IS_LESS(4, 2, 0) - -static int ipv6_mc_check_ip6hdr(struct sk_buff *skb) -{ - const struct ipv6hdr *ip6h; - unsigned int len; - unsigned int offset = skb_network_offset(skb) + sizeof(*ip6h); - - if (!pskb_may_pull(skb, offset)) - return -EINVAL; - - ip6h = ipv6_hdr(skb); - - if (ip6h->version != 6) - return -EINVAL; - - len = offset + ntohs(ip6h->payload_len); - if (skb->len < len || len <= offset) - return -EINVAL; - - return 0; -} - -static int ipv6_mc_check_exthdrs(struct sk_buff *skb) -{ - const struct ipv6hdr *ip6h; - int offset; - u8 nexthdr; - __be16 frag_off; - - ip6h = ipv6_hdr(skb); - - if (ip6h->nexthdr != IPPROTO_HOPOPTS) - return -ENOMSG; - - nexthdr = ip6h->nexthdr; - offset = skb_network_offset(skb) + sizeof(*ip6h); - offset = ipv6_skip_exthdr(skb, offset, &nexthdr, &frag_off); - - if (offset < 0) - return -EINVAL; - - if (nexthdr != IPPROTO_ICMPV6) - return -ENOMSG; - - skb_set_transport_header(skb, offset); - - return 0; -} - -static int ipv6_mc_check_mld_reportv2(struct sk_buff *skb) -{ - unsigned int len = skb_transport_offset(skb); - - len += sizeof(struct mld2_report); - - return pskb_may_pull(skb, len) ? 0 : -EINVAL; -} - -static int ipv6_mc_check_mld_query(struct sk_buff *skb) -{ - struct mld_msg *mld; - unsigned int len = skb_transport_offset(skb); - - /* RFC2710+RFC3810 (MLDv1+MLDv2) require link-local source addresses */ - if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) - return -EINVAL; - - len += sizeof(struct mld_msg); - if (skb->len < len) - return -EINVAL; - - /* MLDv1? */ - if (skb->len != len) { - /* or MLDv2? */ - len += sizeof(struct mld2_query) - sizeof(struct mld_msg); - if (skb->len < len || !pskb_may_pull(skb, len)) - return -EINVAL; - } - - mld = (struct mld_msg *)skb_transport_header(skb); - - /* RFC2710+RFC3810 (MLDv1+MLDv2) require the multicast link layer - * all-nodes destination address (ff02::1) for general queries - */ - if (ipv6_addr_any(&mld->mld_mca) && - !ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr)) - return -EINVAL; - - return 0; -} - -static int ipv6_mc_check_mld_msg(struct sk_buff *skb) -{ - struct mld_msg *mld = (struct mld_msg *)skb_transport_header(skb); - - switch (mld->mld_type) { - case ICMPV6_MGM_REDUCTION: - case ICMPV6_MGM_REPORT: - /* fall through */ - return 0; - case ICMPV6_MLD2_REPORT: - return ipv6_mc_check_mld_reportv2(skb); - case ICMPV6_MGM_QUERY: - return ipv6_mc_check_mld_query(skb); - default: - return -ENOMSG; - } -} - -static inline __sum16 ipv6_mc_validate_checksum(struct sk_buff *skb) -{ - return skb_checksum_validate(skb, IPPROTO_ICMPV6, ip6_compute_pseudo); -} - -static int __ipv6_mc_check_mld(struct sk_buff *skb) - -{ - struct sk_buff *skb_chk = NULL; - unsigned int transport_len; - unsigned int len = skb_transport_offset(skb) + sizeof(struct mld_msg); - int ret; - - transport_len = ntohs(ipv6_hdr(skb)->payload_len); - transport_len -= skb_transport_offset(skb) - sizeof(struct ipv6hdr); - - skb_get(skb); - skb_chk = skb_checksum_trimmed(skb, transport_len, - ipv6_mc_validate_checksum); - if (!skb_chk) - return -EINVAL; - - if (!pskb_may_pull(skb_chk, len)) { - kfree_skb(skb_chk); - return -EINVAL; - } - - ret = ipv6_mc_check_mld_msg(skb_chk); - if (ret) { - kfree_skb(skb_chk); - return ret; - } - - kfree_skb(skb_chk); - - return 0; -} - -/** - * ipv6_mc_check_mld - checks whether this is a sane MLD packet - * @skb: the skb to validate - * - * Checks whether an IPv6 packet is a valid MLD packet. If so sets - * skb network and transport headers accordingly and returns zero. - * - * -EINVAL: A broken packet was detected, i.e. it violates some internet - * standard - * -ENOMSG: IP header validation succeeded but it is not an MLD packet. - * -ENOMEM: A memory allocation failure happened. - */ -int ipv6_mc_check_mld(struct sk_buff *skb) -{ - int ret; - - ret = ipv6_mc_check_ip6hdr(skb); - if (ret < 0) - return ret; - - ret = ipv6_mc_check_exthdrs(skb); - if (ret < 0) - return ret; - - return __ipv6_mc_check_mld(skb); -} - -#endif /* LINUX_VERSION_IS_LESS(4, 2, 0) */ diff --git a/compat.h b/compat.h index 21bacc5d..e3220e39 100644 --- a/compat.h +++ b/compat.h @@ -15,19 +15,6 @@
#include "compat-autoconf.h"
-#if LINUX_VERSION_IS_LESS(4, 0, 0) - -/* wild hack for batadv_getlink_net only */ -#define get_link_net get_xstats_size || 1 ? fallback_net : (struct net*)netdev->rtnl_link_ops->get_xstats_size - -#endif /* LINUX_VERSION_IS_LESS(4, 0, 0) */ - -#if LINUX_VERSION_IS_LESS(4, 3, 0) - -#define IFF_NO_QUEUE 0; dev->tx_queue_len = 0 - -#endif /* LINUX_VERSION_IS_LESS(4, 3, 0) */ - #if LINUX_VERSION_IS_LESS(4, 15, 0)
#define batadv_softif_slave_add(__dev, __slave_dev, __extack) \