X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fipv6%2Freassembly.c;h=6f9a9046510f730a6f1f431010e9ffe5f6e05e16;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=eef985e010ea7f85b06927d11fd181099825227f;hpb=43bc926fffd92024b46cafaf7350d669ba9ca884;p=linux-2.6.git diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index eef985e01..6f9a90465 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -28,7 +28,6 @@ * YOSHIFUJI,H. @USAGI Always remove fragment header to * calculate ICV correctly. */ -#include #include #include #include @@ -48,16 +47,17 @@ #include #include +#include #include #include #include #include #include -int sysctl_ip6frag_high_thresh = 256*1024; -int sysctl_ip6frag_low_thresh = 192*1024; +int sysctl_ip6frag_high_thresh __read_mostly = 256*1024; +int sysctl_ip6frag_low_thresh __read_mostly = 192*1024; -int sysctl_ip6frag_time = IPV6_FRAG_TIMEOUT; +int sysctl_ip6frag_time __read_mostly = IPV6_FRAG_TIMEOUT; struct ip6frag_skb_cb { @@ -77,7 +77,7 @@ struct frag_queue struct hlist_node list; struct list_head lru_list; /* lru list member */ - __u32 id; /* fragment id */ + __be32 id; /* fragment id */ struct in6_addr saddr; struct in6_addr daddr; @@ -125,35 +125,35 @@ static __inline__ void fq_unlink(struct frag_queue *fq) * callers should be careful not to use the hash value outside the ipfrag_lock * as doing so could race with ipfrag_hash_rnd being recalculated. */ -static unsigned int ip6qhashfn(u32 id, struct in6_addr *saddr, +static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr, struct in6_addr *daddr) { u32 a, b, c; - a = saddr->s6_addr32[0]; - b = saddr->s6_addr32[1]; - c = saddr->s6_addr32[2]; + a = (__force u32)saddr->s6_addr32[0]; + b = (__force u32)saddr->s6_addr32[1]; + c = (__force u32)saddr->s6_addr32[2]; a += JHASH_GOLDEN_RATIO; b += JHASH_GOLDEN_RATIO; c += ip6_frag_hash_rnd; __jhash_mix(a, b, c); - a += saddr->s6_addr32[3]; - b += daddr->s6_addr32[0]; - c += daddr->s6_addr32[1]; + a += (__force u32)saddr->s6_addr32[3]; + b += (__force u32)daddr->s6_addr32[0]; + c += (__force u32)daddr->s6_addr32[1]; __jhash_mix(a, b, c); - a += daddr->s6_addr32[2]; - b += daddr->s6_addr32[3]; - c += id; + a += (__force u32)daddr->s6_addr32[2]; + b += (__force u32)daddr->s6_addr32[3]; + c += (__force u32)id; __jhash_mix(a, b, c); return c & (IP6Q_HASHSZ - 1); } static struct timer_list ip6_frag_secret_timer; -int sysctl_ip6frag_secret_interval = 10 * 60 * HZ; +int sysctl_ip6frag_secret_interval __read_mostly = 10 * 60 * HZ; static void ip6_frag_secret_rebuild(unsigned long dummy) { @@ -258,7 +258,7 @@ static __inline__ void fq_kill(struct frag_queue *fq) } } -static void ip6_evictor(void) +static void ip6_evictor(struct inet6_dev *idev) { struct frag_queue *fq; struct list_head *tmp; @@ -285,14 +285,14 @@ static void ip6_evictor(void) spin_unlock(&fq->lock); fq_put(fq, &work); - IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS); } } static void ip6_frag_expire(unsigned long data) { struct frag_queue *fq = (struct frag_queue *) data; - struct net_device *dev; + struct net_device *dev = NULL; spin_lock(&fq->lock); @@ -301,17 +301,19 @@ static void ip6_frag_expire(unsigned long data) fq_kill(fq); - IP6_INC_STATS_BH(IPSTATS_MIB_REASMTIMEOUT); - IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + dev = dev_get_by_index(fq->iif); + if (!dev) + goto out; + + rcu_read_lock(); + IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMTIMEOUT); + IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMFAILS); + rcu_read_unlock(); /* Don't send error if the first segment did not arrive. */ if (!(fq->last_in&FIRST_IN) || !fq->fragments) goto out; - dev = dev_get_by_index(fq->iif); - if (!dev) - goto out; - /* But use as source device on which LAST ARRIVED segment was received. And do not use fq->dev @@ -319,8 +321,9 @@ static void ip6_frag_expire(unsigned long data) */ fq->fragments->dev = dev; icmpv6_send(fq->fragments, ICMPV6_TIME_EXCEED, ICMPV6_EXC_FRAGTIME, 0, dev); - dev_put(dev); out: + if (dev) + dev_put(dev); spin_unlock(&fq->lock); fq_put(fq, NULL); } @@ -367,7 +370,8 @@ static struct frag_queue *ip6_frag_intern(struct frag_queue *fq_in) static struct frag_queue * -ip6_frag_create(u32 id, struct in6_addr *src, struct in6_addr *dst) +ip6_frag_create(__be32 id, struct in6_addr *src, struct in6_addr *dst, + struct inet6_dev *idev) { struct frag_queue *fq; @@ -387,12 +391,13 @@ ip6_frag_create(u32 id, struct in6_addr *src, struct in6_addr *dst) return ip6_frag_intern(fq); oom: - IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS); return NULL; } static __inline__ struct frag_queue * -fq_find(u32 id, struct in6_addr *src, struct in6_addr *dst) +fq_find(__be32 id, struct in6_addr *src, struct in6_addr *dst, + struct inet6_dev *idev) { struct frag_queue *fq; struct hlist_node *n; @@ -411,7 +416,7 @@ fq_find(u32 id, struct in6_addr *src, struct in6_addr *dst) } read_unlock(&ip6_frag_lock); - return ip6_frag_create(id, src, dst); + return ip6_frag_create(id, src, dst, idev); } @@ -429,12 +434,13 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb, ((u8 *) (fhdr + 1) - (u8 *) (skb->nh.ipv6h + 1))); if ((unsigned int)end > IPV6_MAXPLEN) { - IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS); + IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), + IPSTATS_MIB_INHDRERRORS); icmpv6_param_prob(skb,ICMPV6_HDR_FIELD, (u8*)&fhdr->frag_off - skb->nh.raw); return; } - if (skb->ip_summed == CHECKSUM_HW) + if (skb->ip_summed == CHECKSUM_COMPLETE) skb->csum = csum_sub(skb->csum, csum_partial(skb->nh.raw, (u8*)(fhdr+1)-skb->nh.raw, 0)); @@ -456,7 +462,8 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb, /* RFC2460 says always send parameter problem in * this case. -DaveM */ - IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS); + IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), + IPSTATS_MIB_INHDRERRORS); icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, offsetof(struct ipv6hdr, payload_len)); return; @@ -572,7 +579,7 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb, return; err: - IP6_INC_STATS(IPSTATS_MIB_REASMFAILS); + IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS); kfree_skb(skb); } @@ -648,7 +655,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff **skb_in, head->len += fp->len; if (head->ip_summed != fp->ip_summed) head->ip_summed = CHECKSUM_NONE; - else if (head->ip_summed == CHECKSUM_HW) + else if (head->ip_summed == CHECKSUM_COMPLETE) head->csum = csum_add(head->csum, fp->csum); head->truesize += fp->truesize; atomic_sub(fp->truesize, &ip6_frag_mem); @@ -663,10 +670,12 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff **skb_in, *skb_in = head; /* Yes, and fold redundant checksum back. 8) */ - if (head->ip_summed == CHECKSUM_HW) + if (head->ip_summed == CHECKSUM_COMPLETE) head->csum = csum_partial(head->nh.raw, head->h.raw-head->nh.raw, head->csum); - IP6_INC_STATS_BH(IPSTATS_MIB_REASMOKS); + rcu_read_lock(); + IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMOKS); + rcu_read_unlock(); fq->fragments = NULL; return 1; @@ -678,7 +687,9 @@ out_oom: if (net_ratelimit()) printk(KERN_DEBUG "ip6_frag_reasm: no memory for reassembly\n"); out_fail: - IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + rcu_read_lock(); + IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMFAILS); + rcu_read_unlock(); return -1; } @@ -692,16 +703,16 @@ static int ipv6_frag_rcv(struct sk_buff **skbp) hdr = skb->nh.ipv6h; - IP6_INC_STATS_BH(IPSTATS_MIB_REASMREQDS); + IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS); /* Jumbo payload inhibits frag. header */ if (hdr->payload_len==0) { - IP6_INC_STATS(IPSTATS_MIB_INHDRERRORS); + IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS); icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb->h.raw-skb->nh.raw); return -1; } if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+sizeof(struct frag_hdr))) { - IP6_INC_STATS(IPSTATS_MIB_INHDRERRORS); + IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS); icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb->h.raw-skb->nh.raw); return -1; } @@ -712,16 +723,17 @@ static int ipv6_frag_rcv(struct sk_buff **skbp) if (!(fhdr->frag_off & htons(0xFFF9))) { /* It is not a fragmented frame */ skb->h.raw += sizeof(struct frag_hdr); - IP6_INC_STATS_BH(IPSTATS_MIB_REASMOKS); + IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMOKS); IP6CB(skb)->nhoff = (u8*)fhdr - skb->nh.raw; return 1; } if (atomic_read(&ip6_frag_mem) > sysctl_ip6frag_high_thresh) - ip6_evictor(); + ip6_evictor(ip6_dst_idev(skb->dst)); - if ((fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr)) != NULL) { + if ((fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr, + ip6_dst_idev(skb->dst))) != NULL) { int ret = -1; spin_lock(&fq->lock); @@ -737,7 +749,7 @@ static int ipv6_frag_rcv(struct sk_buff **skbp) return ret; } - IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS); kfree_skb(skb); return -1; }