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[IPV6]: fix flowlabel seqfile handling 

There's a bug in the seqfile show operation for flowlabel objects, where 
each hash chain is traversed cumulatively for each element.  The following 
function is called for each element of each chain:

static void ip6fl_fl_seq_show(struct seq_file *seq, struct ip6_flowlabel *fl)
{
        while(fl) {
                seq_printf...
		
		fl = fl->next;
	}
}

Thus, objects can appear mutliple times when reading 
/proc/net/ip6_flowlabel, as the above is called for each element in the 
chain.

The solution is to remove the while() loop from the above, and traverse 
each chain exactly once, per the patch below.  This also removes the 
ip6fl_fl_seq_show() function, which does nothing else.

Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
James Morris 2006-10-31 00:43:44 -08:00 committed by David S. Miller
parent c6817e4c32
commit 1b7c2dbc07
1 changed files with 6 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
net/ipv6/ip6_flowlabel.c
View File

@ -627,9 +627,13 @@ static void ip6fl_seq_stop(struct seq_file *seq, void *v)
read_unlock_bh(&ip6_fl_lock);
}
static void ip6fl_fl_seq_show(struct seq_file *seq, struct ip6_flowlabel *fl)
static int ip6fl_seq_show(struct seq_file *seq, void *v)
{
while(fl) {
if (v == SEQ_START_TOKEN)
seq_printf(seq, "%-5s %-1s %-6s %-6s %-6s %-8s %-32s %s\n",
"Label", "S", "Owner", "Users", "Linger", "Expires", "Dst", "Opt");
else {
struct ip6_flowlabel *fl = v;
seq_printf(seq,
"%05X %-1d %-6d %-6d %-6ld %-8ld " NIP6_SEQFMT " %-4d\n",
(unsigned)ntohl(fl->label),
@ -640,17 +644,7 @@ static void ip6fl_fl_seq_show(struct seq_file *seq, struct ip6_flowlabel *fl)
(long)(fl->expires - jiffies)/HZ,
NIP6(fl->dst),
fl->opt ? fl->opt->opt_nflen : 0);
fl = fl->next;
}
}
static int ip6fl_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_printf(seq, "%-5s %-1s %-6s %-6s %-6s %-8s %-32s %s\n",
"Label", "S", "Owner", "Users", "Linger", "Expires", "Dst", "Opt");
else
ip6fl_fl_seq_show(seq, v);
return 0;
}