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[IPVS]: Flag synced connections and expose them in proc

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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>
This commit is contained in:
Rumen G. Bogdanovski 2007-11-19 21:52:42 -08:00 committed by David S. Miller
parent c237899d1f
commit 7a4fbb1fa4
2 changed files with 54 additions and 1 deletions
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53
net/ipv4/ipvs/ip_vs_conn.c
View File

@ -781,6 +781,57 @@ static const struct file_operations ip_vs_conn_fops = {
.llseek = seq_lseek,
.release = seq_release,
};
static const char *ip_vs_origin_name(unsigned flags)
{
if (flags & IP_VS_CONN_F_SYNC)
return "SYNC";
else
return "LOCAL";
}
static int ip_vs_conn_sync_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_puts(seq,
"Pro FromIP FPrt ToIP TPrt DestIP DPrt State Origin Expires\n");
else {
const struct ip_vs_conn *cp = v;
seq_printf(seq,
"%-3s %08X %04X %08X %04X %08X %04X %-11s %-6s %7lu\n",
ip_vs_proto_name(cp->protocol),
ntohl(cp->caddr), ntohs(cp->cport),
ntohl(cp->vaddr), ntohs(cp->vport),
ntohl(cp->daddr), ntohs(cp->dport),
ip_vs_state_name(cp->protocol, cp->state),
ip_vs_origin_name(cp->flags),
(cp->timer.expires-jiffies)/HZ);
}
return 0;
}
static const struct seq_operations ip_vs_conn_sync_seq_ops = {
.start = ip_vs_conn_seq_start,
.next = ip_vs_conn_seq_next,
.stop = ip_vs_conn_seq_stop,
.show = ip_vs_conn_sync_seq_show,
};
static int ip_vs_conn_sync_open(struct inode *inode, struct file *file)
{
return seq_open(file, &ip_vs_conn_sync_seq_ops);
}
static const struct file_operations ip_vs_conn_sync_fops = {
.owner = THIS_MODULE,
.open = ip_vs_conn_sync_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
#endif
@ -940,6 +991,7 @@ int ip_vs_conn_init(void)
}
proc_net_fops_create(&init_net, "ip_vs_conn", 0, &ip_vs_conn_fops);
proc_net_fops_create(&init_net, "ip_vs_conn_sync", 0, &ip_vs_conn_sync_fops);
/* calculate the random value for connection hash */
get_random_bytes(&ip_vs_conn_rnd, sizeof(ip_vs_conn_rnd));
@ -956,5 +1008,6 @@ void ip_vs_conn_cleanup(void)
/* Release the empty cache */
kmem_cache_destroy(ip_vs_conn_cachep);
proc_net_remove(&init_net, "ip_vs_conn");
proc_net_remove(&init_net, "ip_vs_conn_sync");
vfree(ip_vs_conn_tab);
}

2
net/ipv4/ipvs/ip_vs_sync.c
View File

@ -308,7 +308,7 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
unsigned flags;
s = (struct ip_vs_sync_conn *)p;
flags = ntohs(s->flags);
flags = ntohs(s->flags) | IP_VS_CONN_F_SYNC;
if (!(flags & IP_VS_CONN_F_TEMPLATE))
cp = ip_vs_conn_in_get(s->protocol,
s->caddr, s->cport,