#include <linux/bvec.h>
#include <linux/highmem.h>
#include <linux/uio.h>
+#include <linux/sched/mm.h>
#include <trace/events/sunrpc.h>
size_t want, seek_init = seek, offset = 0;
ssize_t ret;
- if (seek < buf->head[0].iov_len) {
- want = min_t(size_t, count, buf->head[0].iov_len);
+ want = min_t(size_t, count, buf->head[0].iov_len);
+ if (seek < want) {
ret = xs_read_kvec(sock, msg, flags, &buf->head[0], want, seek);
if (ret <= 0)
goto sock_err;
goto out;
seek = 0;
} else {
- seek -= buf->head[0].iov_len;
- offset += buf->head[0].iov_len;
+ seek -= want;
+ offset += want;
}
want = xs_alloc_sparse_pages(buf,
min_t(size_t, count - offset, buf->page_len),
- GFP_NOWAIT);
+ GFP_KERNEL);
if (seek < want) {
ret = xs_read_bvec(sock, msg, flags, buf->bvec,
xdr_buf_pagecount(buf),
offset += want;
}
- if (seek < buf->tail[0].iov_len) {
- want = min_t(size_t, count - offset, buf->tail[0].iov_len);
+ want = min_t(size_t, count - offset, buf->tail[0].iov_len);
+ if (seek < want) {
ret = xs_read_kvec(sock, msg, flags, &buf->tail[0], want, seek);
if (ret <= 0)
goto sock_err;
goto out;
if (ret != want)
goto out;
- } else
- offset += buf->tail[0].iov_len;
+ } else if (offset < seek_init)
+ offset = seek_init;
ret = -EMSGSIZE;
out:
*read = offset - seek_init;
return transport->recv.fraghdr & cpu_to_be32(RPC_LAST_STREAM_FRAGMENT);
}
+static void
+xs_read_stream_check_eor(struct sock_xprt *transport,
+ struct msghdr *msg)
+{
+ if (xs_read_stream_request_done(transport))
+ msg->msg_flags |= MSG_EOR;
+}
+
static ssize_t
xs_read_stream_request(struct sock_xprt *transport, struct msghdr *msg,
int flags, struct rpc_rqst *req)
xs_read_header(transport, buf);
want = transport->recv.len - transport->recv.offset;
- ret = xs_read_xdr_buf(transport->sock, msg, flags, buf,
- transport->recv.copied + want, transport->recv.copied,
- &read);
- transport->recv.offset += read;
- transport->recv.copied += read;
- if (transport->recv.offset == transport->recv.len) {
- if (xs_read_stream_request_done(transport))
- msg->msg_flags |= MSG_EOR;
- return read;
+ if (want != 0) {
+ ret = xs_read_xdr_buf(transport->sock, msg, flags, buf,
+ transport->recv.copied + want,
+ transport->recv.copied,
+ &read);
+ transport->recv.offset += read;
+ transport->recv.copied += read;
}
+ if (transport->recv.offset == transport->recv.len)
+ xs_read_stream_check_eor(transport, msg);
+
+ if (want == 0)
+ return 0;
+
switch (ret) {
default:
break;
return ret != 0 ? ret : -ESHUTDOWN;
}
+static __poll_t xs_poll_socket(struct sock_xprt *transport)
+{
+ return transport->sock->ops->poll(transport->file, transport->sock,
+ NULL);
+}
+
+static bool xs_poll_socket_readable(struct sock_xprt *transport)
+{
+ __poll_t events = xs_poll_socket(transport);
+
+ return (events & (EPOLLIN | EPOLLRDNORM)) && !(events & EPOLLRDHUP);
+}
+
+static void xs_poll_check_readable(struct sock_xprt *transport)
+{
+
+ clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state);
+ if (!xs_poll_socket_readable(transport))
+ return;
+ if (!test_and_set_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
+ queue_work(xprtiod_workqueue, &transport->recv_worker);
+}
+
static void xs_stream_data_receive(struct sock_xprt *transport)
{
size_t read = 0;
ssize_t ret = 0;
mutex_lock(&transport->recv_mutex);
- clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state);
if (transport->sock == NULL)
goto out;
for (;;) {
read += ret;
cond_resched();
}
+ if (ret == -ESHUTDOWN)
+ kernel_sock_shutdown(transport->sock, SHUT_RDWR);
+ else
+ xs_poll_check_readable(transport);
out:
mutex_unlock(&transport->recv_mutex);
trace_xs_stream_read_data(&transport->xprt, ret, read);
{
struct sock_xprt *transport =
container_of(work, struct sock_xprt, recv_worker);
+ unsigned int pflags = memalloc_nofs_save();
+
xs_stream_data_receive(transport);
+ memalloc_nofs_restore(pflags);
}
static void
transport->recv.len = 0;
transport->recv.copied = 0;
transport->xmit.offset = 0;
+}
+
+static void
+xs_stream_start_connect(struct sock_xprt *transport)
+{
transport->xprt.stat.connect_count++;
transport->xprt.stat.connect_start = jiffies;
}
#define XS_SENDMSG_FLAGS (MSG_DONTWAIT | MSG_NOSIGNAL)
-static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, struct kvec *vec, unsigned int base, int more)
+static int xs_sendmsg(struct socket *sock, struct msghdr *msg, size_t seek)
{
- struct msghdr msg = {
- .msg_name = addr,
- .msg_namelen = addrlen,
- .msg_flags = XS_SENDMSG_FLAGS | (more ? MSG_MORE : 0),
- };
- struct kvec iov = {
- .iov_base = vec->iov_base + base,
- .iov_len = vec->iov_len - base,
- };
+ if (seek)
+ iov_iter_advance(&msg->msg_iter, seek);
+ return sock_sendmsg(sock, msg);
+}
- if (iov.iov_len != 0)
- return kernel_sendmsg(sock, &msg, &iov, 1, iov.iov_len);
- return kernel_sendmsg(sock, &msg, NULL, 0, 0);
+static int xs_send_kvec(struct socket *sock, struct msghdr *msg, struct kvec *vec, size_t seek)
+{
+ iov_iter_kvec(&msg->msg_iter, WRITE, vec, 1, vec->iov_len);
+ return xs_sendmsg(sock, msg, seek);
}
-static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more, bool zerocopy, int *sent_p)
+static int xs_send_pagedata(struct socket *sock, struct msghdr *msg, struct xdr_buf *xdr, size_t base)
{
- ssize_t (*do_sendpage)(struct socket *sock, struct page *page,
- int offset, size_t size, int flags);
- struct page **ppage;
- unsigned int remainder;
int err;
- remainder = xdr->page_len - base;
- base += xdr->page_base;
- ppage = xdr->pages + (base >> PAGE_SHIFT);
- base &= ~PAGE_MASK;
- do_sendpage = sock->ops->sendpage;
- if (!zerocopy)
- do_sendpage = sock_no_sendpage;
- for(;;) {
- unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder);
- int flags = XS_SENDMSG_FLAGS;
+ err = xdr_alloc_bvec(xdr, GFP_KERNEL);
+ if (err < 0)
+ return err;
- remainder -= len;
- 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;
- *sent_p += err;
- ppage++;
- base = 0;
- }
- if (err > 0) {
- *sent_p += err;
- err = 0;
- }
- return err;
+ iov_iter_bvec(&msg->msg_iter, WRITE, xdr->bvec,
+ xdr_buf_pagecount(xdr),
+ xdr->page_len + xdr->page_base);
+ return xs_sendmsg(sock, msg, base + xdr->page_base);
+}
+
+#define xs_record_marker_len() sizeof(rpc_fraghdr)
+
+/* Common case:
+ * - stream transport
+ * - sending from byte 0 of the message
+ * - the message is wholly contained in @xdr's head iovec
+ */
+static int xs_send_rm_and_kvec(struct socket *sock, struct msghdr *msg,
+ rpc_fraghdr marker, struct kvec *vec, size_t base)
+{
+ struct kvec iov[2] = {
+ [0] = {
+ .iov_base = &marker,
+ .iov_len = sizeof(marker)
+ },
+ [1] = *vec,
+ };
+ size_t len = iov[0].iov_len + iov[1].iov_len;
+
+ iov_iter_kvec(&msg->msg_iter, WRITE, iov, 2, len);
+ return xs_sendmsg(sock, msg, base);
}
/**
* @addrlen: UDP only -- length of destination address
* @xdr: buffer containing this request
* @base: starting position in the buffer
- * @zerocopy: true if it is safe to use sendpage()
+ * @rm: stream record marker field
* @sent_p: return the total number of bytes successfully queued for sending
*
*/
-static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, bool zerocopy, int *sent_p)
+static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, rpc_fraghdr rm, int *sent_p)
{
- unsigned int remainder = xdr->len - base;
+ struct msghdr msg = {
+ .msg_name = addr,
+ .msg_namelen = addrlen,
+ .msg_flags = XS_SENDMSG_FLAGS | MSG_MORE,
+ };
+ unsigned int rmsize = rm ? sizeof(rm) : 0;
+ unsigned int remainder = rmsize + xdr->len - base;
+ unsigned int want;
int err = 0;
- int sent = 0;
if (unlikely(!sock))
return -ENOTSOCK;
- if (base != 0) {
- addr = NULL;
- addrlen = 0;
- }
-
- if (base < xdr->head[0].iov_len || addr != NULL) {
- unsigned int len = xdr->head[0].iov_len - base;
+ want = xdr->head[0].iov_len + rmsize;
+ if (base < want) {
+ unsigned int len = want - base;
remainder -= len;
- err = xs_send_kvec(sock, addr, addrlen, &xdr->head[0], base, remainder != 0);
+ if (remainder == 0)
+ msg.msg_flags &= ~MSG_MORE;
+ if (rmsize)
+ err = xs_send_rm_and_kvec(sock, &msg, rm,
+ &xdr->head[0], base);
+ else
+ err = xs_send_kvec(sock, &msg, &xdr->head[0], base);
if (remainder == 0 || err != len)
goto out;
*sent_p += err;
base = 0;
} else
- base -= xdr->head[0].iov_len;
+ base -= want;
if (base < xdr->page_len) {
unsigned int len = xdr->page_len - base;
remainder -= len;
- err = xs_send_pagedata(sock, xdr, base, remainder != 0, zerocopy, &sent);
- *sent_p += sent;
- if (remainder == 0 || sent != len)
+ if (remainder == 0)
+ msg.msg_flags &= ~MSG_MORE;
+ err = xs_send_pagedata(sock, &msg, xdr, base);
+ if (remainder == 0 || err != len)
goto out;
+ *sent_p += err;
base = 0;
} else
base -= xdr->page_len;
if (base >= xdr->tail[0].iov_len)
return 0;
- err = xs_send_kvec(sock, NULL, 0, &xdr->tail[0], base, 0);
+ msg.msg_flags &= ~MSG_MORE;
+ err = xs_send_kvec(sock, &msg, &xdr->tail[0], base);
out:
if (err > 0) {
*sent_p += err;
static void
xs_stream_prepare_request(struct rpc_rqst *req)
{
- req->rq_task->tk_status = xdr_alloc_bvec(&req->rq_rcv_buf, GFP_NOIO);
+ req->rq_task->tk_status = xdr_alloc_bvec(&req->rq_rcv_buf, GFP_KERNEL);
}
/*
}
/*
- * Construct a stream transport record marker in @buf.
+ * Return the stream record marker field for a record of length < 2^31-1
*/
-static inline void xs_encode_stream_record_marker(struct xdr_buf *buf)
+static rpc_fraghdr
+xs_stream_record_marker(struct xdr_buf *xdr)
{
- u32 reclen = buf->len - sizeof(rpc_fraghdr);
- rpc_fraghdr *base = buf->head[0].iov_base;
- *base = cpu_to_be32(RPC_LAST_STREAM_FRAGMENT | reclen);
+ if (!xdr->len)
+ return 0;
+ return cpu_to_be32(RPC_LAST_STREAM_FRAGMENT | (u32)xdr->len);
}
/**
return -ENOTCONN;
}
- xs_encode_stream_record_marker(&req->rq_snd_buf);
-
xs_pktdump("packet data:",
req->rq_svec->iov_base, req->rq_svec->iov_len);
req->rq_xtime = ktime_get();
status = xs_sendpages(transport->sock, NULL, 0, xdr,
transport->xmit.offset,
- true, &sent);
+ xs_stream_record_marker(xdr),
+ &sent);
dprintk("RPC: %s(%u) = %d\n",
__func__, xdr->len - transport->xmit.offset, status);
req->rq_bytes_sent = transport->xmit.offset;
if (likely(req->rq_bytes_sent >= req->rq_slen)) {
req->rq_xmit_bytes_sent += transport->xmit.offset;
- req->rq_bytes_sent = 0;
transport->xmit.offset = 0;
return 0;
}
req->rq_xtime = ktime_get();
status = xs_sendpages(transport->sock, xs_addr(xprt), xprt->addrlen,
- xdr, 0, true, &sent);
+ xdr, 0, 0, &sent);
dprintk("RPC: xs_udp_send_request(%u) = %d\n",
xdr->len, status);
struct rpc_xprt *xprt = req->rq_xprt;
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
struct xdr_buf *xdr = &req->rq_snd_buf;
- bool zerocopy = true;
bool vm_wait = false;
int status;
int sent;
return -ENOTCONN;
}
- xs_encode_stream_record_marker(&req->rq_snd_buf);
-
xs_pktdump("packet data:",
req->rq_svec->iov_base,
req->rq_svec->iov_len);
- /* Don't use zero copy if this is a resend. If the RPC call
- * completes while the socket holds a reference to the pages,
- * then we may end up resending corrupted data.
- */
- if (req->rq_task->tk_flags & RPC_TASK_SENT)
- zerocopy = false;
if (test_bit(XPRT_SOCK_UPD_TIMEOUT, &transport->sock_state))
xs_tcp_set_socket_timeouts(xprt, transport->sock);
sent = 0;
status = xs_sendpages(transport->sock, NULL, 0, xdr,
transport->xmit.offset,
- zerocopy, &sent);
+ xs_stream_record_marker(xdr),
+ &sent);
dprintk("RPC: xs_tcp_send_request(%u) = %d\n",
xdr->len - transport->xmit.offset, status);
req->rq_bytes_sent = transport->xmit.offset;
if (likely(req->rq_bytes_sent >= req->rq_slen)) {
req->rq_xmit_bytes_sent += transport->xmit.offset;
- req->rq_bytes_sent = 0;
transport->xmit.offset = 0;
return 0;
}
struct socket *sock = transport->sock;
struct sock *sk = transport->inet;
struct rpc_xprt *xprt = &transport->xprt;
+ struct file *filp = transport->file;
if (sk == NULL)
return;
write_lock_bh(&sk->sk_callback_lock);
transport->inet = NULL;
transport->sock = NULL;
+ transport->file = NULL;
sk->sk_user_data = NULL;
xprt_clear_connected(xprt);
write_unlock_bh(&sk->sk_callback_lock);
xs_sock_reset_connection_flags(xprt);
+ /* Reset stream record info */
+ xs_stream_reset_connect(transport);
mutex_unlock(&transport->recv_mutex);
trace_rpc_socket_close(xprt, sock);
- sock_release(sock);
+ fput(filp);
xprt_disconnect_done(xprt);
}
int err;
mutex_lock(&transport->recv_mutex);
- clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state);
sk = transport->inet;
if (sk == NULL)
goto out;
consume_skb(skb);
cond_resched();
}
+ xs_poll_check_readable(transport);
out:
mutex_unlock(&transport->recv_mutex);
}
{
struct sock_xprt *transport =
container_of(work, struct sock_xprt, recv_worker);
+ unsigned int pflags = memalloc_nofs_save();
+
xs_udp_data_receive(transport);
+ memalloc_nofs_restore(pflags);
}
/**
struct sock_xprt *transport, int family, int type,
int protocol, bool reuseport)
{
+ struct file *filp;
struct socket *sock;
int err;
goto out;
}
+ filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
+ if (IS_ERR(filp))
+ return ERR_CAST(filp);
+ transport->file = filp;
+
return sock;
out:
return ERR_PTR(err);
sk->sk_write_space = xs_udp_write_space;
sock_set_flag(sk, SOCK_FASYNC);
sk->sk_error_report = xs_error_report;
- sk->sk_allocation = GFP_NOIO;
xprt_clear_connected(xprt);
write_unlock_bh(&sk->sk_callback_lock);
}
- xs_stream_reset_connect(transport);
+ xs_stream_start_connect(transport);
return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, 0);
}
static int xs_local_setup_socket(struct sock_xprt *transport)
{
struct rpc_xprt *xprt = &transport->xprt;
+ struct file *filp;
struct socket *sock;
int status = -EIO;
}
xs_reclassify_socket(AF_LOCAL, sock);
+ filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
+ if (IS_ERR(filp)) {
+ status = PTR_ERR(filp);
+ goto out;
+ }
+ transport->file = filp;
+
dprintk("RPC: worker connecting xprt %p via AF_LOCAL to %s\n",
xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
sk->sk_data_ready = xs_data_ready;
sk->sk_write_space = xs_udp_write_space;
sock_set_flag(sk, SOCK_FASYNC);
- sk->sk_allocation = GFP_NOIO;
xprt_set_connected(xprt);
sk->sk_write_space = xs_tcp_write_space;
sock_set_flag(sk, SOCK_FASYNC);
sk->sk_error_report = xs_error_report;
- sk->sk_allocation = GFP_NOIO;
/* socket options */
sock_reset_flag(sk, SOCK_LINGER);
xs_set_memalloc(xprt);
- /* Reset TCP record info */
- xs_stream_reset_connect(transport);
+ xs_stream_start_connect(transport);
/* Tell the socket layer to start connecting... */
set_bit(XPRT_SOCK_CONNECTING, &transport->sock_state);
{
int len;
struct xdr_buf *xbufp = &req->rq_snd_buf;
- struct rpc_xprt *xprt = req->rq_xprt;
struct sock_xprt *transport =
- container_of(xprt, struct sock_xprt, xprt);
- struct socket *sock = transport->sock;
+ container_of(req->rq_xprt, struct sock_xprt, xprt);
unsigned long headoff;
unsigned long tailoff;
+ struct page *tailpage;
+ struct msghdr msg = {
+ .msg_flags = MSG_MORE
+ };
+ rpc_fraghdr marker = cpu_to_be32(RPC_LAST_STREAM_FRAGMENT |
+ (u32)xbufp->len);
+ struct kvec iov = {
+ .iov_base = &marker,
+ .iov_len = sizeof(marker),
+ };
- xs_encode_stream_record_marker(xbufp);
+ len = kernel_sendmsg(transport->sock, &msg, &iov, 1, iov.iov_len);
+ if (len != iov.iov_len)
+ return -EAGAIN;
+ tailpage = NULL;
+ if (xbufp->tail[0].iov_len)
+ tailpage = virt_to_page(xbufp->tail[0].iov_base);
tailoff = (unsigned long)xbufp->tail[0].iov_base & ~PAGE_MASK;
headoff = (unsigned long)xbufp->head[0].iov_base & ~PAGE_MASK;
- len = svc_send_common(sock, xbufp,
+ len = svc_send_common(transport->sock, xbufp,
virt_to_page(xbufp->head[0].iov_base), headoff,
- xbufp->tail[0].iov_base, tailoff);
-
- if (len != xbufp->len) {
- printk(KERN_NOTICE "Error sending entire callback!\n");
- len = -EAGAIN;
- }
-
+ tailpage, tailoff);
+ if (len != xbufp->len)
+ return -EAGAIN;
return len;
}
transport = container_of(xprt, struct sock_xprt, xprt);
xprt->prot = 0;
- xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
xprt->bind_timeout = XS_BIND_TO;
transport = container_of(xprt, struct sock_xprt, xprt);
xprt->prot = IPPROTO_UDP;
- xprt->tsh_size = 0;
/* XXX: header size can vary due to auth type, IPv6, etc. */
xprt->max_payload = (1U << 16) - (MAX_HEADER << 3);
transport = container_of(xprt, struct sock_xprt, xprt);
xprt->prot = IPPROTO_TCP;
- xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
xprt->bind_timeout = XS_BIND_TO;
transport = container_of(xprt, struct sock_xprt, xprt);
xprt->prot = IPPROTO_TCP;
- xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
xprt->timeout = &xs_tcp_default_timeout;
projects / linux-2.6-microblaze.git / blobdiff