/* * xfrm6_output.c - Common IPsec encapsulation code for IPv6. * Copyright (C) 2002 USAGI/WIDE Project * Copyright (c) 2004 Herbert Xu * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, u8 **prevhdr) { return ip6_find_1stfragopt(skb, prevhdr); } EXPORT_SYMBOL(xfrm6_find_1stfragopt); static int xfrm6_local_dontfrag(struct sk_buff *skb) { int proto; struct sock *sk = skb->sk; if (sk) { if (sk->sk_family != AF_INET6) return 0; proto = sk->sk_protocol; if (proto == IPPROTO_UDP || proto == IPPROTO_RAW) return inet6_sk(sk)->dontfrag; } return 0; } static void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu) { struct flowi6 fl6; struct sock *sk = skb->sk; fl6.flowi6_oif = sk->sk_bound_dev_if; fl6.daddr = ipv6_hdr(skb)->daddr; ipv6_local_rxpmtu(sk, &fl6, mtu); } void xfrm6_local_error(struct sk_buff *skb, u32 mtu) { struct flowi6 fl6; const struct ipv6hdr *hdr; struct sock *sk = skb->sk; hdr = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); fl6.fl6_dport = inet_sk(sk)->inet_dport; fl6.daddr = hdr->daddr; ipv6_local_error(sk, EMSGSIZE, &fl6, mtu); } static int xfrm6_tunnel_check_size(struct sk_buff *skb) { int mtu, ret = 0; struct dst_entry *dst = skb_dst(skb); mtu = dst_mtu(dst); if (mtu < IPV6_MIN_MTU) mtu = IPV6_MIN_MTU; if (!skb->ignore_df && skb->len > mtu) { skb->dev = dst->dev; skb->protocol = htons(ETH_P_IPV6); if (xfrm6_local_dontfrag(skb)) xfrm6_local_rxpmtu(skb, mtu); else if (skb->sk) xfrm_local_error(skb, mtu); else icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); ret = -EMSGSIZE; } return ret; } int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb) { int err; err = xfrm6_tunnel_check_size(skb); if (err) return err; XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr; return xfrm6_extract_header(skb); } int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb) { int err; err = xfrm_inner_extract_output(x, skb); if (err) return err; skb->ignore_df = 1; skb->protocol = htons(ETH_P_IPV6); return x->outer_mode->output2(x, skb); } EXPORT_SYMBOL(xfrm6_prepare_output); int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb) { memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); #ifdef CONFIG_NETFILTER IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED; #endif return xfrm_output(sk, skb); } static int __xfrm6_output_finish(struct net *net, struct sock *sk, struct sk_buff *skb) { struct xfrm_state *x = skb_dst(skb)->xfrm; return x->outer_mode->afinfo->output_finish(sk, skb); } static int __xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb) { struct dst_entry *dst = skb_dst(skb); struct xfrm_state *x = dst->xfrm; int mtu; bool toobig; #ifdef CONFIG_NETFILTER if (!x) { IP6CB(skb)->flags |= IP6SKB_REROUTED; return dst_output(net, sk, skb); } #endif if (x->props.mode != XFRM_MODE_TUNNEL) goto skip_frag; if (skb->protocol == htons(ETH_P_IPV6)) mtu = ip6_skb_dst_mtu(skb); else mtu = dst_mtu(skb_dst(skb)); toobig = skb->len > mtu && !skb_is_gso(skb); if (toobig && xfrm6_local_dontfrag(skb)) { xfrm6_local_rxpmtu(skb, mtu); return -EMSGSIZE; } else if (!skb->ignore_df && toobig && skb->sk) { xfrm_local_error(skb, mtu); return -EMSGSIZE; } if (toobig || dst_allfrag(skb_dst(skb))) return ip6_fragment(net, sk, skb, __xfrm6_output_finish); skip_frag: return x->outer_mode->afinfo->output_finish(sk, skb); } int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb) { return NF_HOOK_COND(NFPROTO_IPV6, NF_INET_POST_ROUTING, net, sk, skb, NULL, skb_dst(skb)->dev, __xfrm6_output, !(IP6CB(skb)->flags & IP6SKB_REROUTED)); } 'selected'>includemode:
authorThomas Gleixner <tglx@linutronix.de>2017-01-31 23:58:38 +0100
committerIngo Molnar <mingo@kernel.org>2017-02-01 08:37:27 +0100
commitdd86e373e09fb16b83e8adf5c48c421a4ca76468 (patch)
tree55703c2ea8584e303e342090614e0aab3509ab21 /sound/firewire/digi00x/amdtp-dot.c
parent0b3589be9b98994ce3d5aeca52445d1f5627c4ba (diff)
perf/x86/intel/rapl: Make package handling more robust
The package management code in RAPL relies on package mapping being available before a CPU is started. This changed with: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") because the ACPI/BIOS information turned out to be unreliable, but that left RAPL in broken state. This was not noticed because on a regular boot all CPUs are online before RAPL is initialized. A possible fix would be to reintroduce the mess which allocates a package data structure in CPU prepare and when it turns out to already exist in starting throw it away later in the CPU online callback. But that's a horrible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'sound/firewire/digi00x/amdtp-dot.c')