[IPVS]: Flag synced connections and expose them in proc
This patch labels the sync-created connections with IP_VS_CONN_F_SYNC flag and creates /proc/net/ip_vs_conn_sync to enable monitoring of the origin of the connections, if they are local or created by the synchronization. Signed-off-by: Rumen G. Bogdanovski <rumen@voicecho.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -781,6 +781,57 @@ static const struct file_operations ip_vs_conn_fops = {
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.llseek = seq_lseek,
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.release = seq_release,
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};
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static const char *ip_vs_origin_name(unsigned flags)
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{
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if (flags & IP_VS_CONN_F_SYNC)
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return "SYNC";
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else
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return "LOCAL";
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}
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static int ip_vs_conn_sync_seq_show(struct seq_file *seq, void *v)
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{
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if (v == SEQ_START_TOKEN)
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seq_puts(seq,
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"Pro FromIP FPrt ToIP TPrt DestIP DPrt State Origin Expires\n");
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else {
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const struct ip_vs_conn *cp = v;
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seq_printf(seq,
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"%-3s %08X %04X %08X %04X %08X %04X %-11s %-6s %7lu\n",
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ip_vs_proto_name(cp->protocol),
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ntohl(cp->caddr), ntohs(cp->cport),
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ntohl(cp->vaddr), ntohs(cp->vport),
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ntohl(cp->daddr), ntohs(cp->dport),
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ip_vs_state_name(cp->protocol, cp->state),
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ip_vs_origin_name(cp->flags),
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(cp->timer.expires-jiffies)/HZ);
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}
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return 0;
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}
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static const struct seq_operations ip_vs_conn_sync_seq_ops = {
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.start = ip_vs_conn_seq_start,
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.next = ip_vs_conn_seq_next,
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.stop = ip_vs_conn_seq_stop,
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.show = ip_vs_conn_sync_seq_show,
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};
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static int ip_vs_conn_sync_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &ip_vs_conn_sync_seq_ops);
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}
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static const struct file_operations ip_vs_conn_sync_fops = {
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.owner = THIS_MODULE,
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.open = ip_vs_conn_sync_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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#endif
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@ -940,6 +991,7 @@ int ip_vs_conn_init(void)
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}
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proc_net_fops_create(&init_net, "ip_vs_conn", 0, &ip_vs_conn_fops);
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proc_net_fops_create(&init_net, "ip_vs_conn_sync", 0, &ip_vs_conn_sync_fops);
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/* calculate the random value for connection hash */
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get_random_bytes(&ip_vs_conn_rnd, sizeof(ip_vs_conn_rnd));
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@ -956,5 +1008,6 @@ void ip_vs_conn_cleanup(void)
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/* Release the empty cache */
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kmem_cache_destroy(ip_vs_conn_cachep);
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proc_net_remove(&init_net, "ip_vs_conn");
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proc_net_remove(&init_net, "ip_vs_conn_sync");
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vfree(ip_vs_conn_tab);
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}
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@ -308,7 +308,7 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
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unsigned flags;
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s = (struct ip_vs_sync_conn *)p;
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flags = ntohs(s->flags);
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flags = ntohs(s->flags) | IP_VS_CONN_F_SYNC;
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if (!(flags & IP_VS_CONN_F_TEMPLATE))
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cp = ip_vs_conn_in_get(s->protocol,
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s->caddr, s->cport,
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