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Merge branch 'sunrpc' 

* sunrpc:
  SUNRPC: Use MSG_SENDPAGE_NOTLAST in xs_send_pagedata()
  SUNRPC: Move AF_LOCAL receive data path into a workqueue context
  SUNRPC: Move UDP receive data path into a workqueue context
  SUNRPC: Move TCP receive data path into a workqueue context
  SUNRPC: Refactor TCP receive
This commit is contained in:
Trond Myklebust 2015-10-08 10:46:19 -04:00
parent 037fc9808a 31303d6cbb
commit 120bf961b9
2 changed files with 166 additions and 77 deletions
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2
include/linux/sunrpc/xprtsock.h
View File

@ -44,6 +44,8 @@ struct sock_xprt {
*/
unsigned long sock_state;
struct delayed_work connect_worker;
struct work_struct recv_worker;
struct mutex recv_mutex;
struct sockaddr_storage srcaddr;
unsigned short srcport;

241
net/sunrpc/xprtsock.c
View File

@ -360,8 +360,10 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i
int flags = XS_SENDMSG_FLAGS;
remainder -= len;
if (remainder != 0 || more)
if (more)
flags |= MSG_MORE;
if (remainder != 0)
flags |= MSG_SENDPAGE_NOTLAST | MSG_MORE;
err = do_sendpage(sock, *ppage, base, len, flags);
if (remainder == 0 || err != len)
break;
@ -823,6 +825,7 @@ static void xs_reset_transport(struct sock_xprt *transport)
kernel_sock_shutdown(sock, SHUT_RDWR);
mutex_lock(&transport->recv_mutex);
write_lock_bh(&sk->sk_callback_lock);
transport->inet = NULL;
transport->sock = NULL;
@ -833,6 +836,7 @@ static void xs_reset_transport(struct sock_xprt *transport)
xprt_clear_connected(xprt);
write_unlock_bh(&sk->sk_callback_lock);
xs_sock_reset_connection_flags(xprt);
mutex_unlock(&transport->recv_mutex);
trace_rpc_socket_close(xprt, sock);
sock_release(sock);
@ -886,6 +890,7 @@ static void xs_destroy(struct rpc_xprt *xprt)
cancel_delayed_work_sync(&transport->connect_worker);
xs_close(xprt);
cancel_work_sync(&transport->recv_worker);
xs_xprt_free(xprt);
module_put(THIS_MODULE);
}
@ -906,44 +911,36 @@ 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;
@ -961,50 +958,68 @@ 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);
}
/**
* xs_udp_data_ready - "data ready" callback for UDP sockets
* @sk: socket with data to read
* xs_udp_data_read_skb - receive callback for UDP sockets
* @xprt: transport
* @sk: socket
* @skb: skbuff
*
*/
static void xs_udp_data_ready(struct sock *sk)
static void xs_udp_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: xs_udp_data_ready...\n");
if (!(xprt = xprt_from_sock(sk)))
goto out;
if ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL)
goto out;
repsize = skb->len - sizeof(struct udphdr);
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(struct udphdr),
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;
@ -1025,10 +1040,54 @@ static void xs_udp_data_ready(struct sock *sk)
xprt_complete_rqst(task, copied);
out_unlock:
spin_unlock(&xprt->transport_lock);
dropit:
skb_free_datagram(sk, skb);
out:
spin_unlock_bh(&xprt->transport_lock);
}
static void xs_udp_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_udp_data_read_skb(&transport->xprt, sk, skb);
skb_free_datagram(sk, skb);
}
out:
mutex_unlock(&transport->recv_mutex);
}
static void xs_udp_data_receive_workfn(struct work_struct *work)
{
struct sock_xprt *transport =
container_of(work, struct sock_xprt, recv_worker);
xs_udp_data_receive(transport);
}
/**
* xs_data_ready - "data ready" callback for UDP sockets
* @sk: socket with data to read
*
*/
static void xs_data_ready(struct sock *sk)
{
struct rpc_xprt *xprt;
read_lock_bh(&sk->sk_callback_lock);
dprintk("RPC: xs_data_ready...\n");
xprt = xprt_from_sock(sk);
if (xprt != NULL) {
struct sock_xprt *transport = container_of(xprt,
struct sock_xprt, xprt);
queue_work(rpciod_workqueue, &transport->recv_worker);
}
read_unlock_bh(&sk->sk_callback_lock);
}
@ -1243,12 +1302,12 @@ static inline int xs_tcp_read_reply(struct rpc_xprt *xprt,
dprintk("RPC: read reply XID %08x\n", ntohl(transport->tcp_xid));
/* Find and lock the request corresponding to this xid */
spin_lock(&xprt->transport_lock);
spin_lock_bh(&xprt->transport_lock);
req = xprt_lookup_rqst(xprt, transport->tcp_xid);
if (!req) {
dprintk("RPC: XID %08x request not found!\n",
ntohl(transport->tcp_xid));
spin_unlock(&xprt->transport_lock);
spin_unlock_bh(&xprt->transport_lock);
return -1;
}
@ -1257,7 +1316,7 @@ static inline int xs_tcp_read_reply(struct rpc_xprt *xprt,
if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
xprt_complete_rqst(req->rq_task, transport->tcp_copied);
spin_unlock(&xprt->transport_lock);
spin_unlock_bh(&xprt->transport_lock);
return 0;
}
@ -1277,10 +1336,10 @@ static int xs_tcp_read_callback(struct rpc_xprt *xprt,
struct rpc_rqst *req;
/* Look up and lock the request corresponding to the given XID */
spin_lock(&xprt->transport_lock);
spin_lock_bh(&xprt->transport_lock);
req = xprt_lookup_bc_request(xprt, transport->tcp_xid);
if (req == NULL) {
spin_unlock(&xprt->transport_lock);
spin_unlock_bh(&xprt->transport_lock);
printk(KERN_WARNING "Callback slot table overflowed\n");
xprt_force_disconnect(xprt);
return -1;
@ -1291,7 +1350,7 @@ static int xs_tcp_read_callback(struct rpc_xprt *xprt,
if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
xprt_complete_bc_request(req, transport->tcp_copied);
spin_unlock(&xprt->transport_lock);
spin_unlock_bh(&xprt->transport_lock);
return 0;
}
@ -1391,6 +1450,44 @@ static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, uns
return len - desc.count;
}
static void xs_tcp_data_receive(struct sock_xprt *transport)
{
struct rpc_xprt *xprt = &transport->xprt;
struct sock *sk;
read_descriptor_t rd_desc = {
.count = 2*1024*1024,
.arg.data = xprt,
};
unsigned long total = 0;
int read = 0;
mutex_lock(&transport->recv_mutex);
sk = transport->inet;
if (sk == NULL)
goto out;
/* We use rd_desc to pass struct xprt to xs_tcp_data_recv */
for (;;) {
lock_sock(sk);
read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv);
release_sock(sk);
if (read <= 0)
break;
total += read;
rd_desc.count = 65536;
}
out:
mutex_unlock(&transport->recv_mutex);
trace_xs_tcp_data_ready(xprt, read, total);
}
static void xs_tcp_data_receive_workfn(struct work_struct *work)
{
struct sock_xprt *transport =
container_of(work, struct sock_xprt, recv_worker);
xs_tcp_data_receive(transport);
}
/**
* xs_tcp_data_ready - "data ready" callback for TCP sockets
* @sk: socket with data to read
@ -1398,34 +1495,24 @@ static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, uns
*/
static void xs_tcp_data_ready(struct sock *sk)
{
struct sock_xprt *transport;
struct rpc_xprt *xprt;
read_descriptor_t rd_desc;
int read;
unsigned long total = 0;
dprintk("RPC: xs_tcp_data_ready...\n");
read_lock_bh(&sk->sk_callback_lock);
if (!(xprt = xprt_from_sock(sk))) {
read = 0;
if (!(xprt = xprt_from_sock(sk)))
goto out;
}
transport = container_of(xprt, struct sock_xprt, xprt);
/* Any data means we had a useful conversation, so
* the we don't need to delay the next reconnect
*/
if (xprt->reestablish_timeout)
xprt->reestablish_timeout = 0;
queue_work(rpciod_workqueue, &transport->recv_worker);
/* We use rd_desc to pass struct xprt to xs_tcp_data_recv */
rd_desc.arg.data = xprt;
do {
rd_desc.count = 65536;
read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv);
if (read > 0)
total += read;
} while (read > 0);
out:
trace_xs_tcp_data_ready(xprt, read, total);
read_unlock_bh(&sk->sk_callback_lock);
}
@ -1873,7 +1960,7 @@ 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;
@ -2059,7 +2146,7 @@ static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
xs_save_old_callbacks(transport, sk);
sk->sk_user_data = xprt;
sk->sk_data_ready = xs_udp_data_ready;
sk->sk_data_ready = xs_data_ready;
sk->sk_write_space = xs_udp_write_space;
sk->sk_allocation = GFP_NOIO;
@ -2650,6 +2737,7 @@ static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args,
}
new = container_of(xprt, struct sock_xprt, xprt);
mutex_init(&new->recv_mutex);
memcpy(&xprt->addr, args->dstaddr, args->addrlen);
xprt->addrlen = args->addrlen;
if (args->srcaddr)
@ -2703,6 +2791,7 @@ 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_local_data_receive_workfn);
INIT_DELAYED_WORK(&transport->connect_worker,
xs_dummy_setup_socket);
@ -2774,21 +2863,20 @@ static struct rpc_xprt *xs_setup_udp(struct xprt_create *args)
xprt->timeout = &xs_udp_default_timeout;
INIT_WORK(&transport->recv_worker, xs_udp_data_receive_workfn);
INIT_DELAYED_WORK(&transport->connect_worker, xs_udp_setup_socket);
switch (addr->sa_family) {
case AF_INET:
if (((struct sockaddr_in *)addr)->sin_port != htons(0))
xprt_set_bound(xprt);
INIT_DELAYED_WORK(&transport->connect_worker,
xs_udp_setup_socket);
xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP);
break;
case AF_INET6:
if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0))
xprt_set_bound(xprt);
INIT_DELAYED_WORK(&transport->connect_worker,
xs_udp_setup_socket);
xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP6);
break;
default:
@ -2853,21 +2941,20 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
xprt->ops = &xs_tcp_ops;
xprt->timeout = &xs_tcp_default_timeout;
INIT_WORK(&transport->recv_worker, xs_tcp_data_receive_workfn);
INIT_DELAYED_WORK(&transport->connect_worker, xs_tcp_setup_socket);
switch (addr->sa_family) {
case AF_INET:
if (((struct sockaddr_in *)addr)->sin_port != htons(0))
xprt_set_bound(xprt);
INIT_DELAYED_WORK(&transport->connect_worker,
xs_tcp_setup_socket);
xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP);
break;
case AF_INET6:
if (((struct sockaddr_in6 *)addr)->sin6_port != htons(0))
xprt_set_bound(xprt);
INIT_DELAYED_WORK(&transport->connect_worker,
xs_tcp_setup_socket);
xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP6);
break;
default: