diff options
| -rw-r--r-- | net/sunrpc/xprt.c | 44 |
1 files changed, 33 insertions, 11 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 57f09ea3ef2a..bf490d0c98c6 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -158,6 +158,32 @@ xprt_class_release(const struct xprt_class *t) } static const struct xprt_class * +xprt_class_find_by_ident_locked(int ident) +{ + const struct xprt_class *t; + + list_for_each_entry(t, &xprt_list, list) { + if (t->ident != ident) + continue; + if (!try_module_get(t->owner)) + continue; + return t; + } + return NULL; +} + +static const struct xprt_class * +xprt_class_find_by_ident(int ident) +{ + const struct xprt_class *t; + + spin_lock(&xprt_list_lock); + t = xprt_class_find_by_ident_locked(ident); + spin_unlock(&xprt_list_lock); + return t; +} + +static const struct xprt_class * xprt_class_find_by_netid_locked(const char *netid) { const struct xprt_class *t; @@ -1929,21 +1955,17 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net) struct rpc_xprt *xprt_create_transport(struct xprt_create *args) { struct rpc_xprt *xprt; - struct xprt_class *t; + const struct xprt_class *t; - spin_lock(&xprt_list_lock); - list_for_each_entry(t, &xprt_list, list) { - if (t->ident == args->ident) { - spin_unlock(&xprt_list_lock); - goto found; - } + t = xprt_class_find_by_ident(args->ident); + if (!t) { + dprintk("RPC: transport (%d) not supported\n", args->ident); + return ERR_PTR(-EIO); } - spin_unlock(&xprt_list_lock); - dprintk("RPC: transport (%d) not supported\n", args->ident); - return ERR_PTR(-EIO); -found: xprt = t->setup(args); + xprt_class_release(t); + if (IS_ERR(xprt)) goto out; if (args->flags & XPRT_CREATE_NO_IDLE_TIMEOUT) |