X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fipv4%2Fip_fragment.c;h=6659ac000eeb81c72666a863177301df3ce59d7f;hb=026722c25e6eb018eab8b9a3c198c258f5b7a2e7;hp=80c2c19196cdafece122893505552b911f012436;hpb=e31e0bdc7e7fb9a4b09d2f3266c035a18fdcee9d;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index 80c2c19..6659ac0 100644 --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -5,10 +5,8 @@ * * The IP fragmentation functionality. * - * Version: $Id: ip_fragment.c,v 1.59 2002/01/12 07:54:56 davem Exp $ - * * Authors: Fred N. van Kempen - * Alan Cox + * Alan Cox * * Fixes: * Alan Cox : Split from ip.c , see ip_input.c for history. @@ -58,7 +56,7 @@ struct ipfrag_skb_cb int offset; }; -#define FRAG_CB(skb) ((struct ipfrag_skb_cb*)((skb)->cb)) +#define FRAG_CB(skb) ((struct ipfrag_skb_cb *)((skb)->cb)) /* Describe an entry in the "incomplete datagrams" queue. */ struct ipq { @@ -74,10 +72,6 @@ struct ipq { struct inet_peer *peer; }; -static struct inet_frags_ctl ip4_frags_ctl __read_mostly = { - .secret_interval = 10 * 60 * HZ, -}; - static struct inet_frags ip4_frags; int ip_frag_nqueues(struct net *net) @@ -184,7 +178,7 @@ static void ip_evictor(struct net *net) evicted = inet_frag_evictor(&net->ipv4.frags, &ip4_frags); if (evicted) - IP_ADD_STATS_BH(IPSTATS_MIB_REASMFAILS, evicted); + IP_ADD_STATS_BH(net, IPSTATS_MIB_REASMFAILS, evicted); } /* @@ -193,23 +187,26 @@ static void ip_evictor(struct net *net) static void ip_expire(unsigned long arg) { struct ipq *qp; + struct net *net; qp = container_of((struct inet_frag_queue *) arg, struct ipq, q); + net = container_of(qp->q.net, struct net, ipv4.frags); spin_lock(&qp->q.lock); - if (qp->q.last_in & COMPLETE) + if (qp->q.last_in & INET_FRAG_COMPLETE) goto out; ipq_kill(qp); - IP_INC_STATS_BH(IPSTATS_MIB_REASMTIMEOUT); - IP_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + IP_INC_STATS_BH(net, IPSTATS_MIB_REASMTIMEOUT); + IP_INC_STATS_BH(net, IPSTATS_MIB_REASMFAILS); - if ((qp->q.last_in&FIRST_IN) && qp->q.fragments != NULL) { + if ((qp->q.last_in & INET_FRAG_FIRST_IN) && qp->q.fragments != NULL) { struct sk_buff *head = qp->q.fragments; + /* Send an ICMP "Fragment Reassembly Timeout" message. */ - if ((head->dev = dev_get_by_index(&init_net, qp->iif)) != NULL) { + if ((head->dev = dev_get_by_index(net, qp->iif)) != NULL) { icmp_send(head, ICMP_TIME_EXCEEDED, ICMP_EXC_FRAGTIME, 0); dev_put(head->dev); } @@ -230,6 +227,8 @@ static inline struct ipq *ip_find(struct net *net, struct iphdr *iph, u32 user) arg.iph = iph; arg.user = user; + + read_lock(&ip4_frags.lock); hash = ipqhashfn(iph->id, iph->saddr, iph->daddr, iph->protocol); q = inet_frag_find(&net->ipv4.frags, &ip4_frags, &arg, hash); @@ -262,7 +261,10 @@ static inline int ip_frag_too_far(struct ipq *qp) rc = qp->q.fragments && (end - start) > max; if (rc) { - IP_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + struct net *net; + + net = container_of(qp->q.net, struct net, ipv4.frags); + IP_INC_STATS_BH(net, IPSTATS_MIB_REASMFAILS); } return rc; @@ -302,7 +304,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb) int ihl, end; int err = -ENOENT; - if (qp->q.last_in & COMPLETE) + if (qp->q.last_in & INET_FRAG_COMPLETE) goto err; if (!(IPCB(skb)->flags & IPSKB_FRAG_COMPLETE) && @@ -328,9 +330,9 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb) * or have different end, the segment is corrrupted. */ if (end < qp->q.len || - ((qp->q.last_in & LAST_IN) && end != qp->q.len)) + ((qp->q.last_in & INET_FRAG_LAST_IN) && end != qp->q.len)) goto err; - qp->q.last_in |= LAST_IN; + qp->q.last_in |= INET_FRAG_LAST_IN; qp->q.len = end; } else { if (end&7) { @@ -340,7 +342,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb) } if (end > qp->q.len) { /* Some bits beyond end -> corruption. */ - if (qp->q.last_in & LAST_IN) + if (qp->q.last_in & INET_FRAG_LAST_IN) goto err; qp->q.len = end; } @@ -439,13 +441,14 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb) qp->q.meat += skb->len; atomic_add(skb->truesize, &qp->q.net->mem); if (offset == 0) - qp->q.last_in |= FIRST_IN; + qp->q.last_in |= INET_FRAG_FIRST_IN; - if (qp->q.last_in == (FIRST_IN | LAST_IN) && qp->q.meat == qp->q.len) + if (qp->q.last_in == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) && + qp->q.meat == qp->q.len) return ip_frag_reasm(qp, prev, dev); write_lock(&ip4_frags.lock); - list_move_tail(&qp->q.lru_list, &ip4_frags.lru_list); + list_move_tail(&qp->q.lru_list, &qp->q.net->lru_list); write_unlock(&ip4_frags.lock); return -EINPROGRESS; @@ -485,8 +488,8 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev, qp->q.fragments = head; } - BUG_TRAP(head != NULL); - BUG_TRAP(FRAG_CB(head)->offset == 0); + WARN_ON(head == NULL); + WARN_ON(FRAG_CB(head)->offset != 0); /* Allocate a new buffer for the datagram. */ ihlen = ip_hdrlen(head); @@ -545,7 +548,7 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev, iph = ip_hdr(head); iph->frag_off = 0; iph->tot_len = htons(len); - IP_INC_STATS_BH(IPSTATS_MIB_REASMOKS); + IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_REASMOKS); qp->q.fragments = NULL; return 0; @@ -556,11 +559,10 @@ out_nomem: goto out_fail; out_oversize: if (net_ratelimit()) - printk(KERN_INFO - "Oversized IP packet from %d.%d.%d.%d.\n", - NIPQUAD(qp->saddr)); + printk(KERN_INFO "Oversized IP packet from %pI4.\n", + &qp->saddr); out_fail: - IP_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_REASMFAILS); return err; } @@ -570,9 +572,9 @@ int ip_defrag(struct sk_buff *skb, u32 user) struct ipq *qp; struct net *net; - IP_INC_STATS_BH(IPSTATS_MIB_REASMREQDS); + net = skb->dev ? dev_net(skb->dev) : dev_net(skb->dst->dev); + IP_INC_STATS_BH(net, IPSTATS_MIB_REASMREQDS); - net = skb->dev->nd_net; /* Start by cleaning up the memory. */ if (atomic_read(&net->ipv4.frags.mem) > net->ipv4.frags.high_thresh) ip_evictor(net); @@ -590,7 +592,7 @@ int ip_defrag(struct sk_buff *skb, u32 user) return ret; } - IP_INC_STATS_BH(IPSTATS_MIB_REASMFAILS); + IP_INC_STATS_BH(net, IPSTATS_MIB_REASMFAILS); kfree_skb(skb); return -ENOMEM; } @@ -598,14 +600,14 @@ int ip_defrag(struct sk_buff *skb, u32 user) #ifdef CONFIG_SYSCTL static int zero; -static struct ctl_table ip4_frags_ctl_table[] = { +static struct ctl_table ip4_frags_ns_ctl_table[] = { { .ctl_name = NET_IPV4_IPFRAG_HIGH_THRESH, .procname = "ipfrag_high_thresh", .data = &init_net.ipv4.frags.high_thresh, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = &proc_dointvec + .proc_handler = proc_dointvec }, { .ctl_name = NET_IPV4_IPFRAG_LOW_THRESH, @@ -613,7 +615,7 @@ static struct ctl_table ip4_frags_ctl_table[] = { .data = &init_net.ipv4.frags.low_thresh, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = &proc_dointvec + .proc_handler = proc_dointvec }, { .ctl_name = NET_IPV4_IPFRAG_TIME, @@ -621,45 +623,47 @@ static struct ctl_table ip4_frags_ctl_table[] = { .data = &init_net.ipv4.frags.timeout, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - .strategy = &sysctl_jiffies + .proc_handler = proc_dointvec_jiffies, + .strategy = sysctl_jiffies }, + { } +}; + +static struct ctl_table ip4_frags_ctl_table[] = { { .ctl_name = NET_IPV4_IPFRAG_SECRET_INTERVAL, .procname = "ipfrag_secret_interval", - .data = &ip4_frags_ctl.secret_interval, + .data = &ip4_frags.secret_interval, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = &proc_dointvec_jiffies, - .strategy = &sysctl_jiffies + .proc_handler = proc_dointvec_jiffies, + .strategy = sysctl_jiffies }, { .procname = "ipfrag_max_dist", .data = &sysctl_ipfrag_max_dist, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = &proc_dointvec_minmax, + .proc_handler = proc_dointvec_minmax, .extra1 = &zero }, { } }; -static int ip4_frags_ctl_register(struct net *net) +static int ip4_frags_ns_ctl_register(struct net *net) { struct ctl_table *table; struct ctl_table_header *hdr; - table = ip4_frags_ctl_table; + table = ip4_frags_ns_ctl_table; if (net != &init_net) { - table = kmemdup(table, sizeof(ip4_frags_ctl_table), GFP_KERNEL); + table = kmemdup(table, sizeof(ip4_frags_ns_ctl_table), GFP_KERNEL); if (table == NULL) goto err_alloc; table[0].data = &net->ipv4.frags.high_thresh; table[1].data = &net->ipv4.frags.low_thresh; table[2].data = &net->ipv4.frags.timeout; - table[3].mode &= ~0222; - table[4].mode &= ~0222; } hdr = register_net_sysctl_table(net, net_ipv4_ctl_path, table); @@ -676,7 +680,7 @@ err_alloc: return -ENOMEM; } -static void ip4_frags_ctl_unregister(struct net *net) +static void ip4_frags_ns_ctl_unregister(struct net *net) { struct ctl_table *table; @@ -684,13 +688,22 @@ static void ip4_frags_ctl_unregister(struct net *net) unregister_net_sysctl_table(net->ipv4.frags_hdr); kfree(table); } + +static void ip4_frags_ctl_register(void) +{ + register_net_sysctl_rotable(net_ipv4_ctl_path, ip4_frags_ctl_table); +} #else -static inline int ip4_frags_ctl_register(struct net *net) +static inline int ip4_frags_ns_ctl_register(struct net *net) { return 0; } -static inline void ip4_frags_ctl_unregister(struct net *net) +static inline void ip4_frags_ns_ctl_unregister(struct net *net) +{ +} + +static inline void ip4_frags_ctl_register(void) { } #endif @@ -714,13 +727,24 @@ static int ipv4_frags_init_net(struct net *net) inet_frags_init_net(&net->ipv4.frags); - return ip4_frags_ctl_register(net); + return ip4_frags_ns_ctl_register(net); } +static void ipv4_frags_exit_net(struct net *net) +{ + ip4_frags_ns_ctl_unregister(net); + inet_frags_exit_net(&net->ipv4.frags, &ip4_frags); +} + +static struct pernet_operations ip4_frags_ops = { + .init = ipv4_frags_init_net, + .exit = ipv4_frags_exit_net, +}; + void __init ipfrag_init(void) { - ipv4_frags_init_net(&init_net); - ip4_frags.ctl = &ip4_frags_ctl; + ip4_frags_ctl_register(); + register_pernet_subsys(&ip4_frags_ops); ip4_frags.hashfn = ip4_hashfn; ip4_frags.constructor = ip4_frag_init; ip4_frags.destructor = ip4_frag_free; @@ -728,6 +752,7 @@ void __init ipfrag_init(void) ip4_frags.qsize = sizeof(struct ipq); ip4_frags.match = ip4_frag_match; ip4_frags.frag_expire = ip_expire; + ip4_frags.secret_interval = 10 * 60 * HZ; inet_frags_init(&ip4_frags); }