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RDS: fix rds_sock reference bug while doing bind

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One need to take rds socket reference while using it and release it
once done with it. rds_add_bind() code path does not do that so
lets fix it.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
This commit is contained in:
Santosh Shilimkar 2012-02-03 11:08:50 -05:00 committed by Santosh Shilimkar
parent 8b0a6b461e
commit 2812695988
1 changed files with 11 additions and 5 deletions
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16
net/rds/bind.c
View file

@ -61,8 +61,10 @@ static struct rds_sock *rds_bind_lookup(__be32 addr, __be16 port,
cmp = ((u64)be32_to_cpu(rs->rs_bound_addr) << 32) |
be16_to_cpu(rs->rs_bound_port);
if (cmp == needle)
if (cmp == needle) {
rds_sock_addref(rs);
return rs;
}
}
if (insert) {
@ -94,10 +96,10 @@ struct rds_sock *rds_find_bound(__be32 addr, __be16 port)
rs = rds_bind_lookup(addr, port, NULL);
read_unlock_irqrestore(&rds_bind_lock, flags);
if (rs && !sock_flag(rds_rs_to_sk(rs), SOCK_DEAD))
rds_sock_addref(rs);
else
if (rs && sock_flag(rds_rs_to_sk(rs), SOCK_DEAD)) {
rds_sock_put(rs);
rs = NULL;
}
rdsdebug("returning rs %p for %pI4:%u\n", rs, &addr,
ntohs(port));
@ -123,14 +125,18 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
write_lock_irqsave(&rds_bind_lock, flags);
do {
struct rds_sock *rrs;
if (rover == 0)
rover++;
if (!rds_bind_lookup(addr, cpu_to_be16(rover), rs)) {
rrs = rds_bind_lookup(addr, cpu_to_be16(rover), rs);
if (!rrs) {
*port = rs->rs_bound_port;
ret = 0;
rdsdebug("rs %p binding to %pI4:%d\n",
rs, &addr, (int)ntohs(*port));
break;
} else {
rds_sock_put(rrs);
}
} while (rover++ != last);