diff options
| author |   Stephen Hemminger <shemminger@osdl.org> | 2006-11-09 16:36:36 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@sunset.davemloft.net> | 2006-12-02 21:21:50 -0800 |
| commit | 35bfbc94070e480f350c868abc4ff9f77e7f2051 (patch) | |
| tree | 4d6f9405aae719308ab5ff36818c048e0062996c /net/ipv4/tcp_cong.c | |
| parent | [TCP]: Restrict congestion control choices. (diff) | |
| download | linux-dev-35bfbc94070e480f350c868abc4ff9f77e7f2051.tar.xz linux-dev-35bfbc94070e480f350c868abc4ff9f77e7f2051.zip | |
[TCP]: Allow autoloading of congestion control via setsockopt.
If user has permision to load modules, then autoload then attempt
autoload of TCP congestion module.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_cong.c')
| -rw-r--r-- | net/ipv4/tcp_cong.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c index 343d6197c92e..5ca7723d0798 100644 --- a/net/ipv4/tcp_cong.c +++ b/net/ipv4/tcp_cong.c @@ -113,7 +113,7 @@ int tcp_set_default_congestion_control(const char *name) spin_lock(&tcp_cong_list_lock); ca = tcp_ca_find(name); #ifdef CONFIG_KMOD - if (!ca) { + if (!ca && capable(CAP_SYS_MODULE)) { spin_unlock(&tcp_cong_list_lock); request_module("tcp_%s", name); @@ -236,9 +236,19 @@ int tcp_set_congestion_control(struct sock *sk, const char *name) rcu_read_lock(); ca = tcp_ca_find(name); + /* no change asking for existing value */ if (ca == icsk->icsk_ca_ops) goto out; +#ifdef CONFIG_KMOD + /* not found attempt to autoload module */ + if (!ca && capable(CAP_SYS_MODULE)) { + rcu_read_unlock(); + request_module("tcp_%s", name); + rcu_read_lock(); + ca = tcp_ca_find(name); + } +#endif if (!ca) err = -ENOENT; |