According to the RFC 4292 (IP Forwarding Table MIB) there is a need for an age
entry for all the routes in the routing table. The entry in the RFC is
inetCidrRouteAge and oid is inetCidrRouteAge.1.10.
Many snmp application require this age entry. So iam adding the age field in
the routing table and providing
the interface for this value via /proc/net/route.
Signed-off-by: Varun Chandramohan <[EMAIL PROTECTED]>
---
net/ipv4/fib_hash.c | 16 +++++++++++-----
net/ipv4/fib_lookup.h | 1 +
2 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index 07e843a..2000f1e 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -448,6 +448,7 @@ static int fn_hash_insert(struct fib_tab
fa->fa_info = fi;
fa->fa_type = cfg->fc_type;
fa->fa_scope = cfg->fc_scope;
+ fa->fa_age = jiffies;
state = fa->fa_state;
fa->fa_state &= ~FA_S_ACCESSED;
fib_hash_genid++;
@@ -507,6 +508,7 @@ static int fn_hash_insert(struct fib_tab
new_fa->fa_type = cfg->fc_type;
new_fa->fa_scope = cfg->fc_scope;
new_fa->fa_state = 0;
+ new_fa->fa_age = jiffies;
/*
* Insert new entry to the list.
@@ -998,10 +1000,11 @@ static int fib_seq_show(struct seq_file
struct fib_alias *fa;
struct fib_info *fi;
+#define JIFFIES_TO_SECS(jiffies) ((jiffies)/HZ)
if (v == SEQ_START_TOKEN) {
seq_printf(seq, "%-127s\n", "Iface\tDestination\tGateway "
"\tFlags\tRefCnt\tUse\tMetric\tMask\t\tMTU"
- "\tWindow\tIRTT");
+ "\tWindow\tIRTT\tAge");
goto out;
}
@@ -1014,17 +1017,20 @@ static int fib_seq_show(struct seq_file
flags = fib_flag_trans(fa->fa_type, mask, fi);
if (fi)
snprintf(bf, sizeof(bf),
- "%s\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u",
+
"%s\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u\t%lu",
fi->fib_dev ? fi->fib_dev->name : "*", prefix,
fi->fib_nh->nh_gw, flags, 0, 0, fi->fib_priority,
mask, (fi->fib_advmss ? fi->fib_advmss + 40 : 0),
fi->fib_window,
- fi->fib_rtt >> 3);
+ fi->fib_rtt >> 3,
+ JIFFIES_TO_SECS(jiffies - fa->fa_age));
else
snprintf(bf, sizeof(bf),
- "*\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u",
- prefix, 0, flags, 0, 0, 0, mask, 0, 0, 0);
+
"*\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u\t%lu",
+ prefix, 0, flags, 0, 0, 0, mask, 0, 0, 0, 0);
seq_printf(seq, "%-127s\n", bf);
+
+#undef JIFFIES_TO_SECS
out:
return 0;
}
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index eef9eec..cc403d4 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -13,6 +13,7 @@ struct fib_alias {
u8 fa_type;
u8 fa_scope;
u8 fa_state;
+ unsigned long fa_age;
};
#define FA_S_ACCESSED 0x01
--
1.4.3.4
-
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