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SUNRPC: Move AF_LOCAL receive data path into a workqueue context 

Now that we've done it for TCP and UDP, let's convert AF_LOCAL as well.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2015-10-06 17:03:00 -04:00
parent f9b2ee714c
commit a26480942c
1 changed files with 42 additions and 30 deletions
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72
net/sunrpc/xprtsock.c
View File

@ -909,44 +909,36 @@ static int xs_local_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb)
}
/**
* xs_local_data_ready - "data ready" callback for AF_LOCAL sockets
* @sk: socket with data to read
* xs_local_data_read_skb
* @xprt: transport
* @sk: socket
* @skb: skbuff
*
* Currently this assumes we can read the whole reply in a single gulp.
*/
static void xs_local_data_ready(struct sock *sk)
static void xs_local_data_read_skb(struct rpc_xprt *xprt,
struct sock *sk,
struct sk_buff *skb)
{
struct rpc_task *task;
struct rpc_xprt *xprt;
struct rpc_rqst *rovr;
struct sk_buff *skb;
int err, repsize, copied;
int repsize, copied;
u32 _xid;
__be32 *xp;
read_lock_bh(&sk->sk_callback_lock);
dprintk("RPC: %s...\n", __func__);
xprt = xprt_from_sock(sk);
if (xprt == NULL)
goto out;
skb = skb_recv_datagram(sk, 0, 1, &err);
if (skb == NULL)
goto out;
repsize = skb->len - sizeof(rpc_fraghdr);
if (repsize < 4) {
dprintk("RPC: impossible RPC reply size %d\n", repsize);
goto dropit;
return;
}
/* Copy the XID from the skb... */
xp = skb_header_pointer(skb, sizeof(rpc_fraghdr), sizeof(_xid), &_xid);
if (xp == NULL)
goto dropit;
return;
/* Look up and lock the request corresponding to the given XID */
spin_lock(&xprt->transport_lock);
spin_lock_bh(&xprt->transport_lock);
rovr = xprt_lookup_rqst(xprt, *xp);
if (!rovr)
goto out_unlock;
@ -964,11 +956,35 @@ static void xs_local_data_ready(struct sock *sk)
xprt_complete_rqst(task, copied);
out_unlock:
spin_unlock(&xprt->transport_lock);
dropit:
skb_free_datagram(sk, skb);
out:
read_unlock_bh(&sk->sk_callback_lock);
spin_unlock_bh(&xprt->transport_lock);
}
static void xs_local_data_receive(struct sock_xprt *transport)
{
struct sk_buff *skb;
struct sock *sk;
int err;
mutex_lock(&transport->recv_mutex);
sk = transport->inet;
if (sk == NULL)
goto out;
for (;;) {
skb = skb_recv_datagram(sk, 0, 1, &err);
if (skb == NULL)
break;
xs_local_data_read_skb(&transport->xprt, sk, skb);
skb_free_datagram(sk, skb);
}
out:
mutex_unlock(&transport->recv_mutex);
}
static void xs_local_data_receive_workfn(struct work_struct *work)
{
struct sock_xprt *transport =
container_of(work, struct sock_xprt, recv_worker);
xs_local_data_receive(transport);
}
/**
@ -1895,10 +1911,6 @@ static inline void xs_reclassify_socket(int family, struct socket *sock)
}
#endif
static void xs_dummy_data_receive_workfn(struct work_struct *work)
{
}
static void xs_dummy_setup_socket(struct work_struct *work)
{
}
@ -1946,7 +1958,7 @@ static int xs_local_finish_connecting(struct rpc_xprt *xprt,
xs_save_old_callbacks(transport, sk);
sk->sk_user_data = xprt;
sk->sk_data_ready = xs_local_data_ready;
sk->sk_data_ready = xs_data_ready;
sk->sk_write_space = xs_udp_write_space;
sk->sk_error_report = xs_error_report;
sk->sk_allocation = GFP_NOIO;
@ -2777,7 +2789,7 @@ static struct rpc_xprt *xs_setup_local(struct xprt_create *args)
xprt->ops = &xs_local_ops;
xprt->timeout = &xs_local_default_timeout;
INIT_WORK(&transport->recv_worker, xs_dummy_data_receive_workfn);
INIT_WORK(&transport->recv_worker, xs_local_data_receive_workfn);
INIT_DELAYED_WORK(&transport->connect_worker,
xs_dummy_setup_socket);