[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>
diff --git a/net/ipv4/ipvs/ip_vs_conn.c b/net/ipv4/ipvs/ip_vs_conn.c
index a22cee4..45a642e 100644
--- a/net/ipv4/ipvs/ip_vs_conn.c
+++ b/net/ipv4/ipvs/ip_vs_conn.c
@@ -781,6 +781,57 @@
.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 @@
}
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 @@
/* 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);
}