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Diffstat (limited to 'net/sunrpc/xprtsock.c')
-rw-r--r--net/sunrpc/xprtsock.c1437
1 files changed, 952 insertions, 485 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 3d739e5d15d..be8bbd5d65e 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -19,6 +19,7 @@
*/
#include <linux/types.h>
+#include <linux/string.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/capability.h>
@@ -28,14 +29,16 @@
#include <linux/in.h>
#include <linux/net.h>
#include <linux/mm.h>
+#include <linux/un.h>
#include <linux/udp.h>
#include <linux/tcp.h>
#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/addr.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/xprtsock.h>
#include <linux/file.h>
-#ifdef CONFIG_NFS_V4_1
+#ifdef CONFIG_SUNRPC_BACKCHANNEL
#include <linux/sunrpc/bc_xprt.h>
#endif
@@ -44,15 +47,21 @@
#include <net/udp.h>
#include <net/tcp.h>
+#include <trace/events/sunrpc.h>
+
#include "sunrpc.h"
+
+static void xs_close(struct rpc_xprt *xprt);
+
/*
* xprtsock tunables
*/
-unsigned int xprt_udp_slot_table_entries = RPC_DEF_SLOT_TABLE;
-unsigned int xprt_tcp_slot_table_entries = RPC_DEF_SLOT_TABLE;
+static unsigned int xprt_udp_slot_table_entries = RPC_DEF_SLOT_TABLE;
+static unsigned int xprt_tcp_slot_table_entries = RPC_MIN_SLOT_TABLE;
+static unsigned int xprt_max_tcp_slot_table_entries = RPC_MAX_SLOT_TABLE;
-unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT;
-unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT;
+static unsigned int xprt_min_resvport = RPC_DEF_MIN_RESVPORT;
+static unsigned int xprt_max_resvport = RPC_DEF_MAX_RESVPORT;
#define XS_TCP_LINGER_TO (15U * HZ)
static unsigned int xs_tcp_fin_timeout __read_mostly = XS_TCP_LINGER_TO;
@@ -70,6 +79,7 @@ static unsigned int xs_tcp_fin_timeout __read_mostly = XS_TCP_LINGER_TO;
static unsigned int min_slot_table_size = RPC_MIN_SLOT_TABLE;
static unsigned int max_slot_table_size = RPC_MAX_SLOT_TABLE;
+static unsigned int max_tcp_slot_table_limit = RPC_MAX_SLOT_TABLE_LIMIT;
static unsigned int xprt_min_resvport_limit = RPC_MIN_RESVPORT;
static unsigned int xprt_max_resvport_limit = RPC_MAX_RESVPORT;
@@ -79,7 +89,7 @@ static struct ctl_table_header *sunrpc_table_header;
* FIXME: changing the UDP slot table size should also resize the UDP
* socket buffers for existing UDP transports
*/
-static ctl_table xs_tunables_table[] = {
+static struct ctl_table xs_tunables_table[] = {
{
.procname = "udp_slot_table_entries",
.data = &xprt_udp_slot_table_entries,
@@ -99,6 +109,15 @@ static ctl_table xs_tunables_table[] = {
.extra2 = &max_slot_table_size
},
{
+ .procname = "tcp_max_slot_table_entries",
+ .data = &xprt_max_tcp_slot_table_entries,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_slot_table_size,
+ .extra2 = &max_tcp_slot_table_limit
+ },
+ {
.procname = "min_resvport",
.data = &xprt_min_resvport,
.maxlen = sizeof(unsigned int),
@@ -126,7 +145,7 @@ static ctl_table xs_tunables_table[] = {
{ },
};
-static ctl_table sunrpc_table[] = {
+static struct ctl_table sunrpc_table[] = {
{
.procname = "sunrpc",
.mode = 0555,
@@ -138,20 +157,6 @@ static ctl_table sunrpc_table[] = {
#endif
/*
- * Time out for an RPC UDP socket connect. UDP socket connects are
- * synchronous, but we set a timeout anyway in case of resource
- * exhaustion on the local host.
- */
-#define XS_UDP_CONN_TO (5U * HZ)
-
-/*
- * Wait duration for an RPC TCP connection to be established. Solaris
- * NFS over TCP uses 60 seconds, for example, which is in line with how
- * long a server takes to reboot.
- */
-#define XS_TCP_CONN_TO (60U * HZ)
-
-/*
* Wait duration for a reply from the RPC portmapper.
*/
#define XS_BIND_TO (60U * HZ)
@@ -224,7 +229,8 @@ struct sock_xprt {
* State of TCP reply receive
*/
__be32 tcp_fraghdr,
- tcp_xid;
+ tcp_xid,
+ tcp_calldir;
u32 tcp_offset,
tcp_reclen;
@@ -248,7 +254,7 @@ struct sock_xprt {
/*
* Saved socket callback addresses
*/
- void (*old_data_ready)(struct sock *, int);
+ void (*old_data_ready)(struct sock *);
void (*old_state_change)(struct sock *);
void (*old_write_space)(struct sock *);
void (*old_error_report)(struct sock *);
@@ -269,11 +275,21 @@ struct sock_xprt {
*/
#define TCP_RPC_REPLY (1UL << 6)
+static inline struct rpc_xprt *xprt_from_sock(struct sock *sk)
+{
+ return (struct rpc_xprt *) sk->sk_user_data;
+}
+
static inline struct sockaddr *xs_addr(struct rpc_xprt *xprt)
{
return (struct sockaddr *) &xprt->addr;
}
+static inline struct sockaddr_un *xs_addr_un(struct rpc_xprt *xprt)
+{
+ return (struct sockaddr_un *) &xprt->addr;
+}
+
static inline struct sockaddr_in *xs_addr_in(struct rpc_xprt *xprt)
{
return (struct sockaddr_in *) &xprt->addr;
@@ -289,24 +305,34 @@ static void xs_format_common_peer_addresses(struct rpc_xprt *xprt)
struct sockaddr *sap = xs_addr(xprt);
struct sockaddr_in6 *sin6;
struct sockaddr_in *sin;
+ struct sockaddr_un *sun;
char buf[128];
- (void)rpc_ntop(sap, buf, sizeof(buf));
- xprt->address_strings[RPC_DISPLAY_ADDR] = kstrdup(buf, GFP_KERNEL);
-
switch (sap->sa_family) {
+ case AF_LOCAL:
+ sun = xs_addr_un(xprt);
+ strlcpy(buf, sun->sun_path, sizeof(buf));
+ xprt->address_strings[RPC_DISPLAY_ADDR] =
+ kstrdup(buf, GFP_KERNEL);
+ break;
case AF_INET:
+ (void)rpc_ntop(sap, buf, sizeof(buf));
+ xprt->address_strings[RPC_DISPLAY_ADDR] =
+ kstrdup(buf, GFP_KERNEL);
sin = xs_addr_in(xprt);
- (void)snprintf(buf, sizeof(buf), "%02x%02x%02x%02x",
- NIPQUAD(sin->sin_addr.s_addr));
+ snprintf(buf, sizeof(buf), "%08x", ntohl(sin->sin_addr.s_addr));
break;
case AF_INET6:
+ (void)rpc_ntop(sap, buf, sizeof(buf));
+ xprt->address_strings[RPC_DISPLAY_ADDR] =
+ kstrdup(buf, GFP_KERNEL);
sin6 = xs_addr_in6(xprt);
- (void)snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr);
+ snprintf(buf, sizeof(buf), "%pi6", &sin6->sin6_addr);
break;
default:
BUG();
}
+
xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = kstrdup(buf, GFP_KERNEL);
}
@@ -315,10 +341,10 @@ static void xs_format_common_peer_ports(struct rpc_xprt *xprt)
struct sockaddr *sap = xs_addr(xprt);
char buf[128];
- (void)snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap));
+ snprintf(buf, sizeof(buf), "%u", rpc_get_port(sap));
xprt->address_strings[RPC_DISPLAY_PORT] = kstrdup(buf, GFP_KERNEL);
- (void)snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap));
+ snprintf(buf, sizeof(buf), "%4hx", rpc_get_port(sap));
xprt->address_strings[RPC_DISPLAY_HEX_PORT] = kstrdup(buf, GFP_KERNEL);
}
@@ -373,8 +399,10 @@ static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen,
return kernel_sendmsg(sock, &msg, NULL, 0, 0);
}
-static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more)
+static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more, bool zerocopy)
{
+ 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, sent = 0;
@@ -383,6 +411,9 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i
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;
@@ -390,7 +421,7 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i
remainder -= len;
if (remainder != 0 || more)
flags |= MSG_MORE;
- err = sock->ops->sendpage(sock, *ppage, base, len, flags);
+ err = do_sendpage(sock, *ppage, base, len, flags);
if (remainder == 0 || err != len)
break;
sent += err;
@@ -411,9 +442,10 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i
* @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()
*
*/
-static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base)
+static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, bool zerocopy)
{
unsigned int remainder = xdr->len - base;
int err, sent = 0;
@@ -441,7 +473,7 @@ static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen,
if (base < xdr->page_len) {
unsigned int len = xdr->page_len - base;
remainder -= len;
- err = xs_send_pagedata(sock, xdr, base, remainder != 0);
+ err = xs_send_pagedata(sock, xdr, base, remainder != 0, zerocopy);
if (remainder == 0 || err != len)
goto out;
sent += err;
@@ -478,7 +510,8 @@ static int xs_nospace(struct rpc_task *task)
struct rpc_rqst *req = task->tk_rqstp;
struct rpc_xprt *xprt = req->rq_xprt;
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
- int ret = 0;
+ struct sock *sk = transport->inet;
+ int ret = -EAGAIN;
dprintk("RPC: %5u xmit incomplete (%u left of %u)\n",
task->tk_pid, req->rq_slen - req->rq_bytes_sent,
@@ -490,13 +523,12 @@ static int xs_nospace(struct rpc_task *task)
/* Don't race with disconnect */
if (xprt_connected(xprt)) {
if (test_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags)) {
- ret = -EAGAIN;
/*
* Notify TCP that we're limited by the application
* window size
*/
set_bit(SOCK_NOSPACE, &transport->sock->flags);
- transport->inet->sk_write_pending++;
+ sk->sk_write_pending++;
/* ...and wait for more buffer space */
xprt_wait_for_buffer_space(task, xs_nospace_callback);
}
@@ -506,9 +538,76 @@ static int xs_nospace(struct rpc_task *task)
}
spin_unlock_bh(&xprt->transport_lock);
+
+ /* Race breaker in case memory is freed before above code is called */
+ sk->sk_write_space(sk);
return ret;
}
+/*
+ * Construct a stream transport record marker in @buf.
+ */
+static inline void xs_encode_stream_record_marker(struct xdr_buf *buf)
+{
+ u32 reclen = buf->len - sizeof(rpc_fraghdr);
+ rpc_fraghdr *base = buf->head[0].iov_base;
+ *base = cpu_to_be32(RPC_LAST_STREAM_FRAGMENT | reclen);
+}
+
+/**
+ * xs_local_send_request - write an RPC request to an AF_LOCAL socket
+ * @task: RPC task that manages the state of an RPC request
+ *
+ * Return values:
+ * 0: The request has been sent
+ * EAGAIN: The socket was blocked, please call again later to
+ * complete the request
+ * ENOTCONN: Caller needs to invoke connect logic then call again
+ * other: Some other error occured, the request was not sent
+ */
+static int xs_local_send_request(struct rpc_task *task)
+{
+ struct rpc_rqst *req = task->tk_rqstp;
+ 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;
+ int status;
+
+ xs_encode_stream_record_marker(&req->rq_snd_buf);
+
+ xs_pktdump("packet data:",
+ req->rq_svec->iov_base, req->rq_svec->iov_len);
+
+ status = xs_sendpages(transport->sock, NULL, 0,
+ xdr, req->rq_bytes_sent, true);
+ dprintk("RPC: %s(%u) = %d\n",
+ __func__, xdr->len - req->rq_bytes_sent, status);
+ if (likely(status >= 0)) {
+ req->rq_bytes_sent += status;
+ req->rq_xmit_bytes_sent += status;
+ if (likely(req->rq_bytes_sent >= req->rq_slen)) {
+ req->rq_bytes_sent = 0;
+ return 0;
+ }
+ status = -EAGAIN;
+ }
+
+ switch (status) {
+ case -EAGAIN:
+ status = xs_nospace(task);
+ break;
+ default:
+ dprintk("RPC: sendmsg returned unrecognized error %d\n",
+ -status);
+ case -EPIPE:
+ xs_close(xprt);
+ status = -ENOTCONN;
+ }
+
+ return status;
+}
+
/**
* xs_udp_send_request - write an RPC request to a UDP socket
* @task: address of RPC task that manages the state of an RPC request
@@ -518,7 +617,7 @@ static int xs_nospace(struct rpc_task *task)
* EAGAIN: The socket was blocked, please call again later to
* complete the request
* ENOTCONN: Caller needs to invoke connect logic then call again
- * other: Some other error occured, the request was not sent
+ * other: Some other error occurred, the request was not sent
*/
static int xs_udp_send_request(struct rpc_task *task)
{
@@ -537,20 +636,18 @@ static int xs_udp_send_request(struct rpc_task *task)
status = xs_sendpages(transport->sock,
xs_addr(xprt),
xprt->addrlen, xdr,
- req->rq_bytes_sent);
+ req->rq_bytes_sent, true);
dprintk("RPC: xs_udp_send_request(%u) = %d\n",
xdr->len - req->rq_bytes_sent, status);
if (status >= 0) {
- task->tk_bytes_sent += status;
+ req->rq_xmit_bytes_sent += status;
if (status >= req->rq_slen)
return 0;
/* Still some bytes left; set up for a retry later. */
status = -EAGAIN;
}
- if (!transport->sock)
- goto out;
switch (status) {
case -ENOTSOCK:
@@ -570,7 +667,7 @@ static int xs_udp_send_request(struct rpc_task *task)
* prompts ECONNREFUSED. */
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
}
-out:
+
return status;
}
@@ -586,15 +683,10 @@ static void xs_tcp_shutdown(struct rpc_xprt *xprt)
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
struct socket *sock = transport->sock;
- if (sock != NULL)
+ if (sock != NULL) {
kernel_sock_shutdown(sock, SHUT_WR);
-}
-
-static inline void xs_encode_tcp_record_marker(struct xdr_buf *buf)
-{
- u32 reclen = buf->len - sizeof(rpc_fraghdr);
- rpc_fraghdr *base = buf->head[0].iov_base;
- *base = htonl(RPC_LAST_STREAM_FRAGMENT | reclen);
+ trace_rpc_socket_shutdown(xprt, sock);
+ }
}
/**
@@ -606,7 +698,7 @@ static inline void xs_encode_tcp_record_marker(struct xdr_buf *buf)
* EAGAIN: The socket was blocked, please call again later to
* complete the request
* ENOTCONN: Caller needs to invoke connect logic then call again
- * other: Some other error occured, the request was not sent
+ * other: Some other error occurred, the request was not sent
*
* XXX: In the case of soft timeouts, should we eventually give up
* if sendmsg is not able to make progress?
@@ -617,20 +709,28 @@ static int xs_tcp_send_request(struct rpc_task *task)
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;
int status;
- xs_encode_tcp_record_marker(&req->rq_snd_buf);
+ 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 (task->tk_flags & RPC_TASK_SENT)
+ zerocopy = false;
/* Continue transmitting the packet/record. We must be careful
* to cope with writespace callbacks arriving _after_ we have
* called sendmsg(). */
while (1) {
status = xs_sendpages(transport->sock,
- NULL, 0, xdr, req->rq_bytes_sent);
+ NULL, 0, xdr, req->rq_bytes_sent,
+ zerocopy);
dprintk("RPC: xs_tcp_send_request(%u) = %d\n",
xdr->len - req->rq_bytes_sent, status);
@@ -641,7 +741,7 @@ static int xs_tcp_send_request(struct rpc_task *task)
/* If we've sent the entire packet, immediately
* reset the count of bytes sent. */
req->rq_bytes_sent += status;
- task->tk_bytes_sent += status;
+ req->rq_xmit_bytes_sent += status;
if (likely(req->rq_bytes_sent >= req->rq_slen)) {
req->rq_bytes_sent = 0;
return 0;
@@ -652,8 +752,6 @@ static int xs_tcp_send_request(struct rpc_task *task)
status = -EAGAIN;
break;
}
- if (!transport->sock)
- goto out;
switch (status) {
case -ENOTSOCK:
@@ -667,13 +765,13 @@ static int xs_tcp_send_request(struct rpc_task *task)
dprintk("RPC: sendmsg returned unrecognized error %d\n",
-status);
case -ECONNRESET:
- case -EPIPE:
xs_tcp_shutdown(xprt);
case -ECONNREFUSED:
case -ENOTCONN:
+ case -EPIPE:
clear_bit(SOCK_ASYNC_NOSPACE, &transport->sock->flags);
}
-out:
+
return status;
}
@@ -695,11 +793,13 @@ static void xs_tcp_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task)
if (task == NULL)
goto out_release;
req = task->tk_rqstp;
+ if (req == NULL)
+ goto out_release;
if (req->rq_bytes_sent == 0)
goto out_release;
if (req->rq_bytes_sent == req->rq_snd_buf.len)
goto out_release;
- set_bit(XPRT_CLOSE_WAIT, &task->tk_xprt->state);
+ set_bit(XPRT_CLOSE_WAIT, &xprt->state);
out_release:
xprt_release_xprt(xprt, task);
}
@@ -720,6 +820,33 @@ static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *s
sk->sk_error_report = transport->old_error_report;
}
+/**
+ * xs_error_report - callback to handle TCP socket state errors
+ * @sk: socket
+ *
+ * Note: we don't call sock_error() since there may be a rpc_task
+ * using the socket, and so we don't want to clear sk->sk_err.
+ */
+static void xs_error_report(struct sock *sk)
+{
+ struct rpc_xprt *xprt;
+ int err;
+
+ read_lock_bh(&sk->sk_callback_lock);
+ if (!(xprt = xprt_from_sock(sk)))
+ goto out;
+
+ err = -sk->sk_err;
+ if (err == 0)
+ goto out;
+ dprintk("RPC: xs_error_report client %p, error=%d...\n",
+ xprt, -err);
+ trace_rpc_socket_error(xprt, sk->sk_socket, err);
+ xprt_wake_pending_tasks(xprt, err);
+ out:
+ read_unlock_bh(&sk->sk_callback_lock);
+}
+
static void xs_reset_transport(struct sock_xprt *transport)
{
struct socket *sock = transport->sock;
@@ -728,6 +855,8 @@ static void xs_reset_transport(struct sock_xprt *transport)
if (sk == NULL)
return;
+ transport->srcport = 0;
+
write_lock_bh(&sk->sk_callback_lock);
transport->inet = NULL;
transport->sock = NULL;
@@ -737,8 +866,7 @@ static void xs_reset_transport(struct sock_xprt *transport)
xs_restore_old_callbacks(transport, sk);
write_unlock_bh(&sk->sk_callback_lock);
- sk->sk_no_check = 0;
-
+ trace_rpc_socket_close(&transport->xprt, sock);
sock_release(sock);
}
@@ -758,14 +886,16 @@ static void xs_close(struct rpc_xprt *xprt)
dprintk("RPC: xs_close xprt %p\n", xprt);
+ cancel_delayed_work_sync(&transport->connect_worker);
+
xs_reset_transport(transport);
xprt->reestablish_timeout = 0;
- smp_mb__before_clear_bit();
+ smp_mb__before_atomic();
clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
clear_bit(XPRT_CLOSING, &xprt->state);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
xprt_disconnect_done(xprt);
}
@@ -777,6 +907,12 @@ static void xs_tcp_close(struct rpc_xprt *xprt)
xs_tcp_shutdown(xprt);
}
+static void xs_xprt_free(struct rpc_xprt *xprt)
+{
+ xs_free_peer_addresses(xprt);
+ xprt_free(xprt);
+}
+
/**
* xs_destroy - prepare to shutdown a transport
* @xprt: doomed transport
@@ -784,22 +920,90 @@ static void xs_tcp_close(struct rpc_xprt *xprt)
*/
static void xs_destroy(struct rpc_xprt *xprt)
{
- struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
-
dprintk("RPC: xs_destroy xprt %p\n", xprt);
- cancel_rearming_delayed_work(&transport->connect_worker);
-
xs_close(xprt);
- xs_free_peer_addresses(xprt);
- kfree(xprt->slot);
- kfree(xprt);
+ xs_xprt_free(xprt);
module_put(THIS_MODULE);
}
-static inline struct rpc_xprt *xprt_from_sock(struct sock *sk)
+static int xs_local_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb)
{
- return (struct rpc_xprt *) sk->sk_user_data;
+ struct xdr_skb_reader desc = {
+ .skb = skb,
+ .offset = sizeof(rpc_fraghdr),
+ .count = skb->len - sizeof(rpc_fraghdr),
+ };
+
+ if (xdr_partial_copy_from_skb(xdr, 0, &desc, xdr_skb_read_bits) < 0)
+ return -1;
+ if (desc.count)
+ return -1;
+ return 0;
+}
+
+/**
+ * xs_local_data_ready - "data ready" callback for AF_LOCAL sockets
+ * @sk: socket with data to read
+ * @len: how much data to read
+ *
+ * Currently this assumes we can read the whole reply in a single gulp.
+ */
+static void xs_local_data_ready(struct sock *sk)
+{
+ struct rpc_task *task;
+ struct rpc_xprt *xprt;
+ struct rpc_rqst *rovr;
+ struct sk_buff *skb;
+ int err, 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;
+ }
+
+ /* Copy the XID from the skb... */
+ xp = skb_header_pointer(skb, sizeof(rpc_fraghdr), sizeof(_xid), &_xid);
+ if (xp == NULL)
+ goto dropit;
+
+ /* Look up and lock the request corresponding to the given XID */
+ spin_lock(&xprt->transport_lock);
+ rovr = xprt_lookup_rqst(xprt, *xp);
+ if (!rovr)
+ goto out_unlock;
+ task = rovr->rq_task;
+
+ copied = rovr->rq_private_buf.buflen;
+ if (copied > repsize)
+ copied = repsize;
+
+ if (xs_local_copy_to_xdr(&rovr->rq_private_buf, skb)) {
+ dprintk("RPC: sk_buff copy failed\n");
+ goto out_unlock;
+ }
+
+ 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);
}
/**
@@ -808,7 +1012,7 @@ static inline struct rpc_xprt *xprt_from_sock(struct sock *sk)
* @len: how much data to read
*
*/
-static void xs_udp_data_ready(struct sock *sk, int len)
+static void xs_udp_data_ready(struct sock *sk)
{
struct rpc_task *task;
struct rpc_xprt *xprt;
@@ -818,7 +1022,7 @@ static void xs_udp_data_ready(struct sock *sk, int len)
u32 _xid;
__be32 *xp;
- read_lock(&sk->sk_callback_lock);
+ read_lock_bh(&sk->sk_callback_lock);
dprintk("RPC: xs_udp_data_ready...\n");
if (!(xprt = xprt_from_sock(sk)))
goto out;
@@ -826,9 +1030,6 @@ static void xs_udp_data_ready(struct sock *sk, int len)
if ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL)
goto out;
- if (xprt->shutdown)
- goto dropit;
-
repsize = skb->len - sizeof(struct udphdr);
if (repsize < 4) {
dprintk("RPC: impossible RPC reply size %d!\n", repsize);
@@ -859,11 +1060,7 @@ static void xs_udp_data_ready(struct sock *sk, int len)
UDPX_INC_STATS_BH(sk, UDP_MIB_INDATAGRAMS);
- /* Something worked... */
- dst_confirm(skb_dst(skb));
-
- xprt_adjust_cwnd(task, copied);
- xprt_update_rtt(task);
+ xprt_adjust_cwnd(xprt, task, copied);
xprt_complete_rqst(task, copied);
out_unlock:
@@ -871,7 +1068,17 @@ static void xs_udp_data_ready(struct sock *sk, int len)
dropit:
skb_free_datagram(sk, skb);
out:
- read_unlock(&sk->sk_callback_lock);
+ read_unlock_bh(&sk->sk_callback_lock);
+}
+
+/*
+ * Helper function to force a TCP close if the server is sending
+ * junk and/or it has put us in CLOSE_WAIT
+ */
+static void xs_tcp_force_close(struct rpc_xprt *xprt)
+{
+ set_bit(XPRT_CONNECTION_CLOSE, &xprt->state);
+ xprt_force_disconnect(xprt);
}
static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_reader *desc)
@@ -900,7 +1107,7 @@ static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_rea
/* Sanity check of the record length */
if (unlikely(transport->tcp_reclen < 8)) {
dprintk("RPC: invalid TCP record fragment length\n");
- xprt_force_disconnect(xprt);
+ xs_tcp_force_close(xprt);
return;
}
dprintk("RPC: reading TCP record fragment of length %d\n",
@@ -947,7 +1154,7 @@ static inline void xs_tcp_read_calldir(struct sock_xprt *transport,
{
size_t len, used;
u32 offset;
- __be32 calldir;
+ char *p;
/*
* We want transport->tcp_offset to be 8 at the end of this routine
@@ -956,26 +1163,33 @@ static inline void xs_tcp_read_calldir(struct sock_xprt *transport,
* transport->tcp_offset is 4 (after having already read the xid).
*/
offset = transport->tcp_offset - sizeof(transport->tcp_xid);
- len = sizeof(calldir) - offset;
+ len = sizeof(transport->tcp_calldir) - offset;
dprintk("RPC: reading CALL/REPLY flag (%Zu bytes)\n", len);
- used = xdr_skb_read_bits(desc, &calldir, len);
+ p = ((char *) &transport->tcp_calldir) + offset;
+ used = xdr_skb_read_bits(desc, p, len);
transport->tcp_offset += used;
if (used != len)
return;
transport->tcp_flags &= ~TCP_RCV_READ_CALLDIR;
- transport->tcp_flags |= TCP_RCV_COPY_CALLDIR;
- transport->tcp_flags |= TCP_RCV_COPY_DATA;
/*
* We don't yet have the XDR buffer, so we will write the calldir
* out after we get the buffer from the 'struct rpc_rqst'
*/
- if (ntohl(calldir) == RPC_REPLY)
+ switch (ntohl(transport->tcp_calldir)) {
+ case RPC_REPLY:
+ transport->tcp_flags |= TCP_RCV_COPY_CALLDIR;
+ transport->tcp_flags |= TCP_RCV_COPY_DATA;
transport->tcp_flags |= TCP_RPC_REPLY;
- else
+ break;
+ case RPC_CALL:
+ transport->tcp_flags |= TCP_RCV_COPY_CALLDIR;
+ transport->tcp_flags |= TCP_RCV_COPY_DATA;
transport->tcp_flags &= ~TCP_RPC_REPLY;
- dprintk("RPC: reading %s CALL/REPLY flag %08x\n",
- (transport->tcp_flags & TCP_RPC_REPLY) ?
- "reply for" : "request with", calldir);
+ break;
+ default:
+ dprintk("RPC: invalid request message type\n");
+ xs_tcp_force_close(&transport->xprt);
+ }
xs_tcp_check_fraghdr(transport);
}
@@ -995,12 +1209,10 @@ static inline void xs_tcp_read_common(struct rpc_xprt *xprt,
/*
* Save the RPC direction in the XDR buffer
*/
- __be32 calldir = transport->tcp_flags & TCP_RPC_REPLY ?
- htonl(RPC_REPLY) : 0;
-
memcpy(rcvbuf->head[0].iov_base + transport->tcp_copied,
- &calldir, sizeof(calldir));
- transport->tcp_copied += sizeof(calldir);
+ &transport->tcp_calldir,
+ sizeof(transport->tcp_calldir));
+ transport->tcp_copied += sizeof(transport->tcp_calldir);
transport->tcp_flags &= ~TCP_RCV_COPY_CALLDIR;
}
@@ -1055,8 +1267,6 @@ static inline void xs_tcp_read_common(struct rpc_xprt *xprt,
if (transport->tcp_flags & TCP_RCV_LAST_FRAG)
transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
}
-
- return;
}
/*
@@ -1091,7 +1301,7 @@ static inline int xs_tcp_read_reply(struct rpc_xprt *xprt,
return 0;
}
-#if defined(CONFIG_NFS_V4_1)
+#if defined(CONFIG_SUNRPC_BACKCHANNEL)
/*
* Obtains an rpc_rqst previously allocated and invokes the common
* tcp read code to read the data. The result is placed in the callback
@@ -1099,41 +1309,29 @@ static inline int xs_tcp_read_reply(struct rpc_xprt *xprt,
* If we're unable to obtain the rpc_rqst we schedule the closing of the
* connection and return -1.
*/
-static inline int xs_tcp_read_callback(struct rpc_xprt *xprt,
+static int xs_tcp_read_callback(struct rpc_xprt *xprt,
struct xdr_skb_reader *desc)
{
struct sock_xprt *transport =
container_of(xprt, struct sock_xprt, xprt);
struct rpc_rqst *req;
- req = xprt_alloc_bc_request(xprt);
+ /* Look up and lock the request corresponding to the given XID */
+ spin_lock(&xprt->transport_lock);
+ req = xprt_lookup_bc_request(xprt, transport->tcp_xid);
if (req == NULL) {
+ spin_unlock(&xprt->transport_lock);
printk(KERN_WARNING "Callback slot table overflowed\n");
xprt_force_disconnect(xprt);
return -1;
}
- req->rq_xid = transport->tcp_xid;
dprintk("RPC: read callback XID %08x\n", ntohl(req->rq_xid));
xs_tcp_read_common(xprt, desc, req);
- if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) {
- struct svc_serv *bc_serv = xprt->bc_serv;
-
- /*
- * Add callback request to callback list. The callback
- * service sleeps on the sv_cb_waitq waiting for new
- * requests. Wake it up after adding enqueing the
- * request.
- */
- dprintk("RPC: add callback request to list\n");
- spin_lock(&bc_serv->sv_cb_lock);
- list_add(&req->rq_bc_list, &bc_serv->sv_cb_list);
- spin_unlock(&bc_serv->sv_cb_lock);
- wake_up(&bc_serv->sv_cb_waitq);
- }
-
- req->rq_private_buf.len = transport->tcp_copied;
+ if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
+ xprt_complete_bc_request(req, transport->tcp_copied);
+ spin_unlock(&xprt->transport_lock);
return 0;
}
@@ -1154,7 +1352,7 @@ static inline int _xs_tcp_read_data(struct rpc_xprt *xprt,
{
return xs_tcp_read_reply(xprt, desc);
}
-#endif /* CONFIG_NFS_V4_1 */
+#endif /* CONFIG_SUNRPC_BACKCHANNEL */
/*
* Read data off the transport. This can be either an RPC_CALL or an
@@ -1237,7 +1435,7 @@ static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, uns
* @bytes: how much data to read
*
*/
-static void xs_tcp_data_ready(struct sock *sk, int bytes)
+static void xs_tcp_data_ready(struct sock *sk)
{
struct rpc_xprt *xprt;
read_descriptor_t rd_desc;
@@ -1245,12 +1443,9 @@ static void xs_tcp_data_ready(struct sock *sk, int bytes)
dprintk("RPC: xs_tcp_data_ready...\n");
- read_lock(&sk->sk_callback_lock);
+ read_lock_bh(&sk->sk_callback_lock);
if (!(xprt = xprt_from_sock(sk)))
goto out;
- if (xprt->shutdown)
- goto out;
-
/* Any data means we had a useful conversation, so
* the we don't need to delay the next reconnect
*/
@@ -1264,7 +1459,7 @@ static void xs_tcp_data_ready(struct sock *sk, int bytes)
read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv);
} while (read > 0);
out:
- read_unlock(&sk->sk_callback_lock);
+ read_unlock_bh(&sk->sk_callback_lock);
}
/*
@@ -1298,12 +1493,19 @@ static void xs_tcp_cancel_linger_timeout(struct rpc_xprt *xprt)
xprt_clear_connecting(xprt);
}
-static void xs_sock_mark_closed(struct rpc_xprt *xprt)
+static void xs_sock_reset_connection_flags(struct rpc_xprt *xprt)
{
- smp_mb__before_clear_bit();
+ smp_mb__before_atomic();
+ clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
+ clear_bit(XPRT_CONNECTION_CLOSE, &xprt->state);
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
clear_bit(XPRT_CLOSING, &xprt->state);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
+}
+
+static void xs_sock_mark_closed(struct rpc_xprt *xprt)
+{
+ xs_sock_reset_connection_flags(xprt);
/* Mark transport as closed and wake up all pending tasks */
xprt_disconnect_done(xprt);
}
@@ -1317,18 +1519,20 @@ static void xs_tcp_state_change(struct sock *sk)
{
struct rpc_xprt *xprt;
- read_lock(&sk->sk_callback_lock);
+ read_lock_bh(&sk->sk_callback_lock);
if (!(xprt = xprt_from_sock(sk)))
goto out;
dprintk("RPC: xs_tcp_state_change client %p...\n", xprt);
- dprintk("RPC: state %x conn %d dead %d zapped %d\n",
+ dprintk("RPC: state %x conn %d dead %d zapped %d sk_shutdown %d\n",
sk->sk_state, xprt_connected(xprt),
sock_flag(sk, SOCK_DEAD),
- sock_flag(sk, SOCK_ZAPPED));
+ sock_flag(sk, SOCK_ZAPPED),
+ sk->sk_shutdown);
+ trace_rpc_socket_state_change(xprt, sk->sk_socket);
switch (sk->sk_state) {
case TCP_ESTABLISHED:
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->transport_lock);
if (!xprt_test_and_set_connected(xprt)) {
struct sock_xprt *transport = container_of(xprt,
struct sock_xprt, xprt);
@@ -1339,27 +1543,28 @@ static void xs_tcp_state_change(struct sock *sk)
transport->tcp_copied = 0;
transport->tcp_flags =
TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID;
+ xprt->connect_cookie++;
xprt_wake_pending_tasks(xprt, -EAGAIN);
}
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->transport_lock);
break;
case TCP_FIN_WAIT1:
/* The client initiated a shutdown of the socket */
xprt->connect_cookie++;
xprt->reestablish_timeout = 0;
set_bit(XPRT_CLOSING, &xprt->state);
- smp_mb__before_clear_bit();
+ smp_mb__before_atomic();
clear_bit(XPRT_CONNECTED, &xprt->state);
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
xs_tcp_schedule_linger_timeout(xprt, xs_tcp_fin_timeout);
break;
case TCP_CLOSE_WAIT:
/* The server initiated a shutdown of the socket */
- xprt_force_disconnect(xprt);
- case TCP_SYN_SENT:
xprt->connect_cookie++;
+ clear_bit(XPRT_CONNECTED, &xprt->state);
+ xs_tcp_force_close(xprt);
case TCP_CLOSING:
/*
* If the server closed down the connection, make sure that
@@ -1371,35 +1576,16 @@ static void xs_tcp_state_change(struct sock *sk)
case TCP_LAST_ACK:
set_bit(XPRT_CLOSING, &xprt->state);
xs_tcp_schedule_linger_timeout(xprt, xs_tcp_fin_timeout);
- smp_mb__before_clear_bit();
+ smp_mb__before_atomic();
clear_bit(XPRT_CONNECTED, &xprt->state);
- smp_mb__after_clear_bit();
+ smp_mb__after_atomic();
break;
case TCP_CLOSE:
xs_tcp_cancel_linger_timeout(xprt);
xs_sock_mark_closed(xprt);
}
out:
- read_unlock(&sk->sk_callback_lock);
-}
-
-/**
- * xs_error_report - callback mainly for catching socket errors
- * @sk: socket
- */
-static void xs_error_report(struct sock *sk)
-{
- struct rpc_xprt *xprt;
-
- read_lock(&sk->sk_callback_lock);
- if (!(xprt = xprt_from_sock(sk)))
- goto out;
- dprintk("RPC: %s client %p...\n"
- "RPC: error %d\n",
- __func__, xprt, sk->sk_err);
- xprt_wake_pending_tasks(xprt, -EAGAIN);
-out:
- read_unlock(&sk->sk_callback_lock);
+ read_unlock_bh(&sk->sk_callback_lock);
}
static void xs_write_space(struct sock *sk)
@@ -1431,13 +1617,13 @@ static void xs_write_space(struct sock *sk)
*/
static void xs_udp_write_space(struct sock *sk)
{
- read_lock(&sk->sk_callback_lock);
+ read_lock_bh(&sk->sk_callback_lock);
/* from net/core/sock.c:sock_def_write_space */
if (sock_writeable(sk))
xs_write_space(sk);
- read_unlock(&sk->sk_callback_lock);
+ read_unlock_bh(&sk->sk_callback_lock);
}
/**
@@ -1452,13 +1638,13 @@ static void xs_udp_write_space(struct sock *sk)
*/
static void xs_tcp_write_space(struct sock *sk)
{
- read_lock(&sk->sk_callback_lock);
+ read_lock_bh(&sk->sk_callback_lock);
/* from net/core/stream.c:sk_stream_write_space */
- if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
+ if (sk_stream_is_writeable(sk))
xs_write_space(sk);
- read_unlock(&sk->sk_callback_lock);
+ read_unlock_bh(&sk->sk_callback_lock);
}
static void xs_udp_do_set_buffer_size(struct rpc_xprt *xprt)
@@ -1505,15 +1691,15 @@ static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t
*
* Adjust the congestion window after a retransmit timeout has occurred.
*/
-static void xs_udp_timer(struct rpc_task *task)
+static void xs_udp_timer(struct rpc_xprt *xprt, struct rpc_task *task)
{
- xprt_adjust_cwnd(task, -ETIMEDOUT);
+ xprt_adjust_cwnd(xprt, task, -ETIMEDOUT);
}
static unsigned short xs_get_random_port(void)
{
unsigned short range = xprt_max_resvport - xprt_min_resvport;
- unsigned short rand = (unsigned short) net_random() % range;
+ unsigned short rand = (unsigned short) prandom_u32() % range;
return rand + xprt_min_resvport;
}
@@ -1531,7 +1717,7 @@ static void xs_set_port(struct rpc_xprt *xprt, unsigned short port)
xs_update_peer_port(xprt);
}
-static unsigned short xs_get_srcport(struct sock_xprt *transport, struct socket *sock)
+static unsigned short xs_get_srcport(struct sock_xprt *transport)
{
unsigned short port = transport->srcport;
@@ -1540,7 +1726,7 @@ static unsigned short xs_get_srcport(struct sock_xprt *transport, struct socket
return port;
}
-static unsigned short xs_next_srcport(struct sock_xprt *transport, struct socket *sock, unsigned short port)
+static unsigned short xs_next_srcport(struct sock_xprt *transport, unsigned short port)
{
if (transport->srcport != 0)
transport->srcport = 0;
@@ -1550,23 +1736,18 @@ static unsigned short xs_next_srcport(struct sock_xprt *transport, struct socket
return xprt_max_resvport;
return --port;
}
-
-static int xs_bind4(struct sock_xprt *transport, struct socket *sock)
+static int xs_bind(struct sock_xprt *transport, struct socket *sock)
{
- struct sockaddr_in myaddr = {
- .sin_family = AF_INET,
- };
- struct sockaddr_in *sa;
+ struct sockaddr_storage myaddr;
int err, nloop = 0;
- unsigned short port = xs_get_srcport(transport, sock);
+ unsigned short port = xs_get_srcport(transport);
unsigned short last;
- sa = (struct sockaddr_in *)&transport->srcaddr;
- myaddr.sin_addr = sa->sin_addr;
+ memcpy(&myaddr, &transport->srcaddr, transport->xprt.addrlen);
do {
- myaddr.sin_port = htons(port);
- err = kernel_bind(sock, (struct sockaddr *) &myaddr,
- sizeof(myaddr));
+ rpc_set_port((struct sockaddr *)&myaddr, port);
+ err = kernel_bind(sock, (struct sockaddr *)&myaddr,
+ transport->xprt.addrlen);
if (port == 0)
break;
if (err == 0) {
@@ -1574,57 +1755,52 @@ static int xs_bind4(struct sock_xprt *transport, struct socket *sock)
break;
}
last = port;
- port = xs_next_srcport(transport, sock, port);
+ port = xs_next_srcport(transport, port);
if (port > last)
nloop++;
} while (err == -EADDRINUSE && nloop != 2);
- dprintk("RPC: %s %pI4:%u: %s (%d)\n",
- __func__, &myaddr.sin_addr,
- port, err ? "failed" : "ok", err);
+
+ if (myaddr.ss_family == AF_INET)
+ dprintk("RPC: %s %pI4:%u: %s (%d)\n", __func__,
+ &((struct sockaddr_in *)&myaddr)->sin_addr,
+ port, err ? "failed" : "ok", err);
+ else
+ dprintk("RPC: %s %pI6:%u: %s (%d)\n", __func__,
+ &((struct sockaddr_in6 *)&myaddr)->sin6_addr,
+ port, err ? "failed" : "ok", err);
return err;
}
-static int xs_bind6(struct sock_xprt *transport, struct socket *sock)
+/*
+ * We don't support autobind on AF_LOCAL sockets
+ */
+static void xs_local_rpcbind(struct rpc_task *task)
{
- struct sockaddr_in6 myaddr = {
- .sin6_family = AF_INET6,
- };
- struct sockaddr_in6 *sa;
- int err, nloop = 0;
- unsigned short port = xs_get_srcport(transport, sock);
- unsigned short last;
+ rcu_read_lock();
+ xprt_set_bound(rcu_dereference(task->tk_client->cl_xprt));
+ rcu_read_unlock();
+}
- sa = (struct sockaddr_in6 *)&transport->srcaddr;
- myaddr.sin6_addr = sa->sin6_addr;
- do {
- myaddr.sin6_port = htons(port);
- err = kernel_bind(sock, (struct sockaddr *) &myaddr,
- sizeof(myaddr));
- if (port == 0)
- break;
- if (err == 0) {
- transport->srcport = port;
- break;
- }
- last = port;
- port = xs_next_srcport(transport, sock, port);
- if (port > last)
- nloop++;
- } while (err == -EADDRINUSE && nloop != 2);
- dprintk("RPC: xs_bind6 %pI6:%u: %s (%d)\n",
- &myaddr.sin6_addr, port, err ? "failed" : "ok", err);
- return err;
+static void xs_local_set_port(struct rpc_xprt *xprt, unsigned short port)
+{
}
#ifdef CONFIG_DEBUG_LOCK_ALLOC
static struct lock_class_key xs_key[2];
static struct lock_class_key xs_slock_key[2];
+static inline void xs_reclassify_socketu(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+
+ sock_lock_init_class_and_name(sk, "slock-AF_LOCAL-RPC",
+ &xs_slock_key[1], "sk_lock-AF_LOCAL-RPC", &xs_key[1]);
+}
+
static inline void xs_reclassify_socket4(struct socket *sock)
{
struct sock *sk = sock->sk;
- BUG_ON(sock_owned_by_user(sk));
sock_lock_init_class_and_name(sk, "slock-AF_INET-RPC",
&xs_slock_key[0], "sk_lock-AF_INET-RPC", &xs_key[0]);
}
@@ -1633,11 +1809,33 @@ static inline void xs_reclassify_socket6(struct socket *sock)
{
struct sock *sk = sock->sk;
- BUG_ON(sock_owned_by_user(sk));
sock_lock_init_class_and_name(sk, "slock-AF_INET6-RPC",
&xs_slock_key[1], "sk_lock-AF_INET6-RPC", &xs_key[1]);
}
+
+static inline void xs_reclassify_socket(int family, struct socket *sock)
+{
+ WARN_ON_ONCE(sock_owned_by_user(sock->sk));
+ if (sock_owned_by_user(sock->sk))
+ return;
+
+ switch (family) {
+ case AF_LOCAL:
+ xs_reclassify_socketu(sock);
+ break;
+ case AF_INET:
+ xs_reclassify_socket4(sock);
+ break;
+ case AF_INET6:
+ xs_reclassify_socket6(sock);
+ break;
+ }
+}
#else
+static inline void xs_reclassify_socketu(struct socket *sock)
+{
+}
+
static inline void xs_reclassify_socket4(struct socket *sock)
{
}
@@ -1645,11 +1843,46 @@ static inline void xs_reclassify_socket4(struct socket *sock)
static inline void xs_reclassify_socket6(struct socket *sock)
{
}
+
+static inline void xs_reclassify_socket(int family, struct socket *sock)
+{
+}
#endif
-static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
+static void xs_dummy_setup_socket(struct work_struct *work)
{
- struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
+}
+
+static struct socket *xs_create_sock(struct rpc_xprt *xprt,
+ struct sock_xprt *transport, int family, int type, int protocol)
+{
+ struct socket *sock;
+ int err;
+
+ err = __sock_create(xprt->xprt_net, family, type, protocol, &sock, 1);
+ if (err < 0) {
+ dprintk("RPC: can't create %d transport socket (%d).\n",
+ protocol, -err);
+ goto out;
+ }
+ xs_reclassify_socket(family, sock);
+
+ err = xs_bind(transport, sock);
+ if (err) {
+ sock_release(sock);
+ goto out;
+ }
+
+ return sock;
+out:
+ return ERR_PTR(err);
+}
+
+static int xs_local_finish_connecting(struct rpc_xprt *xprt,
+ struct socket *sock)
+{
+ struct sock_xprt *transport = container_of(xprt, struct sock_xprt,
+ xprt);
if (!transport->inet) {
struct sock *sk = sock->sk;
@@ -1659,13 +1892,12 @@ 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_local_data_ready;
sk->sk_write_space = xs_udp_write_space;
sk->sk_error_report = xs_error_report;
- sk->sk_no_check = UDP_CSUM_NORCV;
sk->sk_allocation = GFP_ATOMIC;
- xprt_set_connected(xprt);
+ xprt_clear_connected(xprt);
/* Reset to new socket */
transport->sock = sock;
@@ -1673,85 +1905,176 @@ static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
write_unlock_bh(&sk->sk_callback_lock);
}
- xs_udp_do_set_buffer_size(xprt);
+
+ /* Tell the socket layer to start connecting... */
+ xprt->stat.connect_count++;
+ xprt->stat.connect_start = jiffies;
+ return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, 0);
}
/**
- * xs_udp_connect_worker4 - set up a UDP socket
- * @work: RPC transport to connect
- *
- * Invoked by a work queue tasklet.
+ * xs_local_setup_socket - create AF_LOCAL socket, connect to a local endpoint
+ * @xprt: RPC transport to connect
+ * @transport: socket transport to connect
+ * @create_sock: function to create a socket of the correct type
*/
-static void xs_udp_connect_worker4(struct work_struct *work)
+static int xs_local_setup_socket(struct sock_xprt *transport)
{
- struct sock_xprt *transport =
- container_of(work, struct sock_xprt, connect_worker.work);
struct rpc_xprt *xprt = &transport->xprt;
- struct socket *sock = transport->sock;
- int err, status = -EIO;
+ struct socket *sock;
+ int status = -EIO;
- if (xprt->shutdown)
- goto out;
+ current->flags |= PF_FSTRANS;
- /* Start by resetting any existing state */
- xs_reset_transport(transport);
-
- err = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock);
- if (err < 0) {
- dprintk("RPC: can't create UDP transport socket (%d).\n", -err);
+ clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
+ status = __sock_create(xprt->xprt_net, AF_LOCAL,
+ SOCK_STREAM, 0, &sock, 1);
+ if (status < 0) {
+ dprintk("RPC: can't create AF_LOCAL "
+ "transport socket (%d).\n", -status);
goto out;
}
- xs_reclassify_socket4(sock);
+ xs_reclassify_socketu(sock);
- if (xs_bind4(transport, sock)) {
- sock_release(sock);
- goto out;
- }
+ dprintk("RPC: worker connecting xprt %p via AF_LOCAL to %s\n",
+ xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
- dprintk("RPC: worker connecting xprt %p via %s to "
- "%s (port %s)\n", xprt,
- xprt->address_strings[RPC_DISPLAY_PROTO],
- xprt->address_strings[RPC_DISPLAY_ADDR],
- xprt->address_strings[RPC_DISPLAY_PORT]);
+ status = xs_local_finish_connecting(xprt, sock);
+ trace_rpc_socket_connect(xprt, sock, status);
+ switch (status) {
+ case 0:
+ dprintk("RPC: xprt %p connected to %s\n",
+ xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
+ xprt_set_connected(xprt);
+ break;
+ case -ENOENT:
+ dprintk("RPC: xprt %p: socket %s does not exist\n",
+ xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
+ break;
+ case -ECONNREFUSED:
+ dprintk("RPC: xprt %p: connection refused for %s\n",
+ xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
+ break;
+ default:
+ printk(KERN_ERR "%s: unhandled error (%d) connecting to %s\n",
+ __func__, -status,
+ xprt->address_strings[RPC_DISPLAY_ADDR]);
+ }
- xs_udp_finish_connecting(xprt, sock);
- status = 0;
out:
xprt_clear_connecting(xprt);
xprt_wake_pending_tasks(xprt, status);
+ current->flags &= ~PF_FSTRANS;
+ return status;
+}
+
+static void xs_local_connect(struct rpc_xprt *xprt, struct rpc_task *task)
+{
+ struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
+ int ret;
+
+ if (RPC_IS_ASYNC(task)) {
+ /*
+ * We want the AF_LOCAL connect to be resolved in the
+ * filesystem namespace of the process making the rpc
+ * call. Thus we connect synchronously.
+ *
+ * If we want to support asynchronous AF_LOCAL calls,
+ * we'll need to figure out how to pass a namespace to
+ * connect.
+ */
+ rpc_exit(task, -ENOTCONN);
+ return;
+ }
+ ret = xs_local_setup_socket(transport);
+ if (ret && !RPC_IS_SOFTCONN(task))
+ msleep_interruptible(15000);
+}
+
+#ifdef CONFIG_SUNRPC_SWAP
+static void xs_set_memalloc(struct rpc_xprt *xprt)
+{
+ struct sock_xprt *transport = container_of(xprt, struct sock_xprt,
+ xprt);
+
+ if (xprt->swapper)
+ sk_set_memalloc(transport->inet);
}
/**
- * xs_udp_connect_worker6 - set up a UDP socket
- * @work: RPC transport to connect
+ * xs_swapper - Tag this transport as being used for swap.
+ * @xprt: transport to tag
+ * @enable: enable/disable
*
- * Invoked by a work queue tasklet.
*/
-static void xs_udp_connect_worker6(struct work_struct *work)
+int xs_swapper(struct rpc_xprt *xprt, int enable)
+{
+ struct sock_xprt *transport = container_of(xprt, struct sock_xprt,
+ xprt);
+ int err = 0;
+
+ if (enable) {
+ xprt->swapper++;
+ xs_set_memalloc(xprt);
+ } else if (xprt->swapper) {
+ xprt->swapper--;
+ sk_clear_memalloc(transport->inet);
+ }
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(xs_swapper);
+#else
+static void xs_set_memalloc(struct rpc_xprt *xprt)
+{
+}
+#endif
+
+static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
+{
+ struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
+
+ if (!transport->inet) {
+ struct sock *sk = sock->sk;
+
+ write_lock_bh(&sk->sk_callback_lock);
+
+ xs_save_old_callbacks(transport, sk);
+
+ sk->sk_user_data = xprt;
+ sk->sk_data_ready = xs_udp_data_ready;
+ sk->sk_write_space = xs_udp_write_space;
+ sk->sk_allocation = GFP_ATOMIC;
+
+ xprt_set_connected(xprt);
+
+ /* Reset to new socket */
+ transport->sock = sock;
+ transport->inet = sk;
+
+ xs_set_memalloc(xprt);
+
+ write_unlock_bh(&sk->sk_callback_lock);
+ }
+ xs_udp_do_set_buffer_size(xprt);
+}
+
+static void xs_udp_setup_socket(struct work_struct *work)
{
struct sock_xprt *transport =
container_of(work, struct sock_xprt, connect_worker.work);
struct rpc_xprt *xprt = &transport->xprt;
struct socket *sock = transport->sock;
- int err, status = -EIO;
+ int status = -EIO;
- if (xprt->shutdown)
- goto out;
+ current->flags |= PF_FSTRANS;
/* Start by resetting any existing state */
xs_reset_transport(transport);
-
- err = sock_create_kern(PF_INET6, SOCK_DGRAM, IPPROTO_UDP, &sock);
- if (err < 0) {
- dprintk("RPC: can't create UDP transport socket (%d).\n", -err);
+ sock = xs_create_sock(xprt, transport,
+ xs_addr(xprt)->sa_family, SOCK_DGRAM, IPPROTO_UDP);
+ if (IS_ERR(sock))
goto out;
- }
- xs_reclassify_socket6(sock);
-
- if (xs_bind6(transport, sock) < 0) {
- sock_release(sock);
- goto out;
- }
dprintk("RPC: worker connecting xprt %p via %s to "
"%s (port %s)\n", xprt,
@@ -1760,22 +2083,24 @@ static void xs_udp_connect_worker6(struct work_struct *work)
xprt->address_strings[RPC_DISPLAY_PORT]);
xs_udp_finish_connecting(xprt, sock);
+ trace_rpc_socket_connect(xprt, sock, 0);
status = 0;
out:
xprt_clear_connecting(xprt);
xprt_wake_pending_tasks(xprt, status);
+ current->flags &= ~PF_FSTRANS;
}
/*
* We need to preserve the port number so the reply cache on the server can
* find our cached RPC replies when we get around to reconnecting.
*/
-static void xs_abort_connection(struct rpc_xprt *xprt, struct sock_xprt *transport)
+static void xs_abort_connection(struct sock_xprt *transport)
{
int result;
struct sockaddr any;
- dprintk("RPC: disconnecting xprt %p to reuse port\n", xprt);
+ dprintk("RPC: disconnecting xprt %p to reuse port\n", transport);
/*
* Disconnect the transport socket by doing a connect operation
@@ -1784,30 +2109,59 @@ static void xs_abort_connection(struct rpc_xprt *xprt, struct sock_xprt *transpo
memset(&any, 0, sizeof(any));
any.sa_family = AF_UNSPEC;
result = kernel_connect(transport->sock, &any, sizeof(any), 0);
+ trace_rpc_socket_reset_connection(&transport->xprt,
+ transport->sock, result);
if (!result)
- xs_sock_mark_closed(xprt);
- else
- dprintk("RPC: AF_UNSPEC connect return code %d\n",
- result);
+ xs_sock_reset_connection_flags(&transport->xprt);
+ dprintk("RPC: AF_UNSPEC connect return code %d\n", result);
}
-static void xs_tcp_reuse_connection(struct rpc_xprt *xprt, struct sock_xprt *transport)
+static void xs_tcp_reuse_connection(struct sock_xprt *transport)
{
unsigned int state = transport->inet->sk_state;
- if (state == TCP_CLOSE && transport->sock->state == SS_UNCONNECTED)
- return;
- if ((1 << state) & (TCPF_ESTABLISHED|TCPF_SYN_SENT))
- return;
- xs_abort_connection(xprt, transport);
+ if (state == TCP_CLOSE && transport->sock->state == SS_UNCONNECTED) {
+ /* we don't need to abort the connection if the socket
+ * hasn't undergone a shutdown
+ */
+ if (transport->inet->sk_shutdown == 0)
+ return;
+ dprintk("RPC: %s: TCP_CLOSEd and sk_shutdown set to %d\n",
+ __func__, transport->inet->sk_shutdown);
+ }
+ if ((1 << state) & (TCPF_ESTABLISHED|TCPF_SYN_SENT)) {
+ /* we don't need to abort the connection if the socket
+ * hasn't undergone a shutdown
+ */
+ if (transport->inet->sk_shutdown == 0)
+ return;
+ dprintk("RPC: %s: ESTABLISHED/SYN_SENT "
+ "sk_shutdown set to %d\n",
+ __func__, transport->inet->sk_shutdown);
+ }
+ xs_abort_connection(transport);
}
static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
{
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
+ int ret = -ENOTCONN;
if (!transport->inet) {
struct sock *sk = sock->sk;
+ unsigned int keepidle = xprt->timeout->to_initval / HZ;
+ unsigned int keepcnt = xprt->timeout->to_retries + 1;
+ unsigned int opt_on = 1;
+
+ /* TCP Keepalive options */
+ kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
+ (char *)&opt_on, sizeof(opt_on));
+ kernel_setsockopt(sock, SOL_TCP, TCP_KEEPIDLE,
+ (char *)&keepidle, sizeof(keepidle));
+ kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL,
+ (char *)&keepidle, sizeof(keepidle));
+ kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT,
+ (char *)&keepcnt, sizeof(keepcnt));
write_lock_bh(&sk->sk_callback_lock);
@@ -1836,12 +2190,23 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
}
if (!xprt_bound(xprt))
- return -ENOTCONN;
+ goto out;
+
+ xs_set_memalloc(xprt);
/* Tell the socket layer to start connecting... */
xprt->stat.connect_count++;
xprt->stat.connect_start = jiffies;
- return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK);
+ ret = kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK);
+ switch (ret) {
+ case 0:
+ case -EINPROGRESS:
+ /* SYN_SENT! */
+ if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO)
+ xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
+ }
+out:
+ return ret;
}
/**
@@ -1852,20 +2217,20 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
*
* Invoked by a work queue tasklet.
*/
-static void xs_tcp_setup_socket(struct rpc_xprt *xprt,
- struct sock_xprt *transport,
- struct socket *(*create_sock)(struct rpc_xprt *,
- struct sock_xprt *))
+static void xs_tcp_setup_socket(struct work_struct *work)
{
+ struct sock_xprt *transport =
+ container_of(work, struct sock_xprt, connect_worker.work);
struct socket *sock = transport->sock;
+ struct rpc_xprt *xprt = &transport->xprt;
int status = -EIO;
- if (xprt->shutdown)
- goto out;
+ current->flags |= PF_FSTRANS;
if (!sock) {
clear_bit(XPRT_CONNECTION_ABORT, &xprt->state);
- sock = create_sock(xprt, transport);
+ sock = xs_create_sock(xprt, transport,
+ xs_addr(xprt)->sa_family, SOCK_STREAM, IPPROTO_TCP);
if (IS_ERR(sock)) {
status = PTR_ERR(sock);
goto out;
@@ -1876,7 +2241,7 @@ static void xs_tcp_setup_socket(struct rpc_xprt *xprt,
abort_and_exit = test_and_clear_bit(XPRT_CONNECTION_ABORT,
&xprt->state);
/* "close" the socket, preserving the local port */
- xs_tcp_reuse_connection(xprt, transport);
+ xs_tcp_reuse_connection(transport);
if (abort_and_exit)
goto out_eagain;
@@ -1889,6 +2254,7 @@ static void xs_tcp_setup_socket(struct rpc_xprt *xprt,
xprt->address_strings[RPC_DISPLAY_PORT]);
status = xs_tcp_finish_connecting(xprt, sock);
+ trace_rpc_socket_connect(xprt, sock, status);
dprintk("RPC: %p connect status %d connected %d sock state %d\n",
xprt, -status, xprt_connected(xprt),
sock->sk->sk_state);
@@ -1900,106 +2266,35 @@ static void xs_tcp_setup_socket(struct rpc_xprt *xprt,
/* We're probably in TIME_WAIT. Get rid of existing socket,
* and retry
*/
- set_bit(XPRT_CONNECTION_CLOSE, &xprt->state);
- xprt_force_disconnect(xprt);
+ xs_tcp_force_close(xprt);
break;
- case -ECONNREFUSED:
- case -ECONNRESET:
- case -ENETUNREACH:
- /* retry with existing socket, after a delay */
case 0:
case -EINPROGRESS:
case -EALREADY:
xprt_clear_connecting(xprt);
+ current->flags &= ~PF_FSTRANS;
return;
+ case -EINVAL:
+ /* Happens, for instance, if the user specified a link
+ * local IPv6 address without a scope-id.
+ */
+ case -ECONNREFUSED:
+ case -ECONNRESET:
+ case -ENETUNREACH:
+ /* retry with existing socket, after a delay */
+ goto out;
}
out_eagain:
status = -EAGAIN;
out:
xprt_clear_connecting(xprt);
xprt_wake_pending_tasks(xprt, status);
-}
-
-static struct socket *xs_create_tcp_sock4(struct rpc_xprt *xprt,
- struct sock_xprt *transport)
-{
- struct socket *sock;
- int err;
-
- /* start from scratch */
- err = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock);
- if (err < 0) {
- dprintk("RPC: can't create TCP transport socket (%d).\n",
- -err);
- goto out_err;
- }
- xs_reclassify_socket4(sock);
-
- if (xs_bind4(transport, sock) < 0) {
- sock_release(sock);
- goto out_err;
- }
- return sock;
-out_err:
- return ERR_PTR(-EIO);
-}
-
-/**
- * xs_tcp_connect_worker4 - connect a TCP socket to a remote endpoint
- * @work: RPC transport to connect
- *
- * Invoked by a work queue tasklet.
- */
-static void xs_tcp_connect_worker4(struct work_struct *work)
-{
- struct sock_xprt *transport =
- container_of(work, struct sock_xprt, connect_worker.work);
- struct rpc_xprt *xprt = &transport->xprt;
-
- xs_tcp_setup_socket(xprt, transport, xs_create_tcp_sock4);
-}
-
-static struct socket *xs_create_tcp_sock6(struct rpc_xprt *xprt,
- struct sock_xprt *transport)
-{
- struct socket *sock;
- int err;
-
- /* start from scratch */
- err = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, &sock);
- if (err < 0) {
- dprintk("RPC: can't create TCP transport socket (%d).\n",
- -err);
- goto out_err;
- }
- xs_reclassify_socket6(sock);
-
- if (xs_bind6(transport, sock) < 0) {
- sock_release(sock);
- goto out_err;
- }
- return sock;
-out_err:
- return ERR_PTR(-EIO);
-}
-
-/**
- * xs_tcp_connect_worker6 - connect a TCP socket to a remote endpoint
- * @work: RPC transport to connect
- *
- * Invoked by a work queue tasklet.
- */
-static void xs_tcp_connect_worker6(struct work_struct *work)
-{
- struct sock_xprt *transport =
- container_of(work, struct sock_xprt, connect_worker.work);
- struct rpc_xprt *xprt = &transport->xprt;
-
- xs_tcp_setup_socket(xprt, transport, xs_create_tcp_sock6);
+ current->flags &= ~PF_FSTRANS;
}
/**
* xs_connect - connect a socket to a remote endpoint
+ * @xprt: pointer to transport structure
* @task: address of RPC task that manages state of connect request
*
* TCP: If the remote end dropped the connection, delay reconnecting.
@@ -2011,14 +2306,10 @@ static void xs_tcp_connect_worker6(struct work_struct *work)
* If a UDP socket connect fails, the delay behavior here prevents
* retry floods (hard mounts).
*/
-static void xs_connect(struct rpc_task *task)
+static void xs_connect(struct rpc_xprt *xprt, struct rpc_task *task)
{
- struct rpc_xprt *xprt = task->tk_xprt;
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
- if (xprt_test_and_set_connecting(xprt))
- return;
-
if (transport->sock != NULL && !RPC_IS_SOFTCONN(task)) {
dprintk("RPC: xs_connect delayed xprt %p for %lu "
"seconds\n",
@@ -2038,14 +2329,33 @@ static void xs_connect(struct rpc_task *task)
}
}
-static void xs_tcp_connect(struct rpc_task *task)
+/**
+ * xs_local_print_stats - display AF_LOCAL socket-specifc stats
+ * @xprt: rpc_xprt struct containing statistics
+ * @seq: output file
+ *
+ */
+static void xs_local_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
{
- struct rpc_xprt *xprt = task->tk_xprt;
+ long idle_time = 0;
- /* Exit if we need to wait for socket shutdown to complete */
- if (test_bit(XPRT_CLOSING, &xprt->state))
- return;
- xs_connect(task);
+ if (xprt_connected(xprt))
+ idle_time = (long)(jiffies - xprt->last_used) / HZ;
+
+ seq_printf(seq, "\txprt:\tlocal %lu %lu %lu %ld %lu %lu %lu "
+ "%llu %llu %lu %llu %llu\n",
+ xprt->stat.bind_count,
+ xprt->stat.connect_count,
+ xprt->stat.connect_time,
+ idle_time,
+ xprt->stat.sends,
+ xprt->stat.recvs,
+ xprt->stat.bad_xids,
+ xprt->stat.req_u,
+ xprt->stat.bklog_u,
+ xprt->stat.max_slots,
+ xprt->stat.sending_u,
+ xprt->stat.pending_u);
}
/**
@@ -2058,14 +2368,18 @@ static void xs_udp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
{
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
- seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %Lu %Lu\n",
+ seq_printf(seq, "\txprt:\tudp %u %lu %lu %lu %lu %llu %llu "
+ "%lu %llu %llu\n",
transport->srcport,
xprt->stat.bind_count,
xprt->stat.sends,
xprt->stat.recvs,
xprt->stat.bad_xids,
xprt->stat.req_u,
- xprt->stat.bklog_u);
+ xprt->stat.bklog_u,
+ xprt->stat.max_slots,
+ xprt->stat.sending_u,
+ xprt->stat.pending_u);
}
/**
@@ -2082,7 +2396,8 @@ static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
if (xprt_connected(xprt))
idle_time = (long)(jiffies - xprt->last_used) / HZ;
- seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu %Lu %Lu\n",
+ seq_printf(seq, "\txprt:\ttcp %u %lu %lu %lu %ld %lu %lu %lu "
+ "%llu %llu %lu %llu %llu\n",
transport->srcport,
xprt->stat.bind_count,
xprt->stat.connect_count,
@@ -2092,7 +2407,10 @@ static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
xprt->stat.recvs,
xprt->stat.bad_xids,
xprt->stat.req_u,
- xprt->stat.bklog_u);
+ xprt->stat.bklog_u,
+ xprt->stat.max_slots,
+ xprt->stat.sending_u,
+ xprt->stat.pending_u);
}
/*
@@ -2100,14 +2418,16 @@ static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq)
* we allocate pages instead doing a kmalloc like rpc_malloc is because we want
* to use the server side send routines.
*/
-void *bc_malloc(struct rpc_task *task, size_t size)
+static void *bc_malloc(struct rpc_task *task, size_t size)
{
struct page *page;
struct rpc_buffer *buf;
- BUG_ON(size > PAGE_SIZE - sizeof(struct rpc_buffer));
- page = alloc_page(GFP_KERNEL);
+ WARN_ON_ONCE(size > PAGE_SIZE - sizeof(struct rpc_buffer));
+ if (size > PAGE_SIZE - sizeof(struct rpc_buffer))
+ return NULL;
+ page = alloc_page(GFP_KERNEL);
if (!page)
return NULL;
@@ -2120,7 +2440,7 @@ void *bc_malloc(struct rpc_task *task, size_t size)
/*
* Free the space allocated in the bc_alloc routine
*/
-void bc_free(void *buffer)
+static void bc_free(void *buffer)
{
struct rpc_buffer *buf;
@@ -2146,10 +2466,7 @@ static int bc_sendto(struct rpc_rqst *req)
unsigned long headoff;
unsigned long tailoff;
- /*
- * Set up the rpc header and record marker stuff
- */
- xs_encode_tcp_record_marker(xbufp);
+ xs_encode_stream_record_marker(xbufp);
tailoff = (unsigned long)xbufp->tail[0].iov_base & ~PAGE_MASK;
headoff = (unsigned long)xbufp->head[0].iov_base & ~PAGE_MASK;
@@ -2172,7 +2489,6 @@ static int bc_send_request(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
struct svc_xprt *xprt;
- struct svc_sock *svsk;
u32 len;
dprintk("sending request with xid: %08x\n", ntohl(req->rq_xid));
@@ -2180,7 +2496,6 @@ static int bc_send_request(struct rpc_task *task)
* Get the server socket associated with this callback xprt
*/
xprt = req->rq_xprt->bc_xprt;
- svsk = container_of(xprt, struct svc_sock, sk_xprt);
/*
* Grab the mutex to serialize data as the connection is shared
@@ -2210,7 +2525,6 @@ static int bc_send_request(struct rpc_task *task)
static void bc_close(struct rpc_xprt *xprt)
{
- return;
}
/*
@@ -2220,13 +2534,33 @@ static void bc_close(struct rpc_xprt *xprt)
static void bc_destroy(struct rpc_xprt *xprt)
{
- return;
+ dprintk("RPC: bc_destroy xprt %p\n", xprt);
+
+ xs_xprt_free(xprt);
+ module_put(THIS_MODULE);
}
+static struct rpc_xprt_ops xs_local_ops = {
+ .reserve_xprt = xprt_reserve_xprt,
+ .release_xprt = xs_tcp_release_xprt,
+ .alloc_slot = xprt_alloc_slot,
+ .rpcbind = xs_local_rpcbind,
+ .set_port = xs_local_set_port,
+ .connect = xs_local_connect,
+ .buf_alloc = rpc_malloc,
+ .buf_free = rpc_free,
+ .send_request = xs_local_send_request,
+ .set_retrans_timeout = xprt_set_retrans_timeout_def,
+ .close = xs_close,
+ .destroy = xs_destroy,
+ .print_stats = xs_local_print_stats,
+};
+
static struct rpc_xprt_ops xs_udp_ops = {
.set_buffer_size = xs_udp_set_buffer_size,
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong,
+ .alloc_slot = xprt_alloc_slot,
.rpcbind = rpcb_getport_async,
.set_port = xs_set_port,
.connect = xs_connect,
@@ -2244,16 +2578,14 @@ static struct rpc_xprt_ops xs_udp_ops = {
static struct rpc_xprt_ops xs_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xs_tcp_release_xprt,
+ .alloc_slot = xprt_lock_and_alloc_slot,
.rpcbind = rpcb_getport_async,
.set_port = xs_set_port,
- .connect = xs_tcp_connect,
+ .connect = xs_connect,
.buf_alloc = rpc_malloc,
.buf_free = rpc_free,
.send_request = xs_tcp_send_request,
.set_retrans_timeout = xprt_set_retrans_timeout_def,
-#if defined(CONFIG_NFS_V4_1)
- .release_request = bc_release_request,
-#endif /* CONFIG_NFS_V4_1 */
.close = xs_tcp_close,
.destroy = xs_destroy,
.print_stats = xs_tcp_print_stats,
@@ -2266,6 +2598,7 @@ static struct rpc_xprt_ops xs_tcp_ops = {
static struct rpc_xprt_ops bc_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xprt_release_xprt,
+ .alloc_slot = xprt_alloc_slot,
.buf_alloc = bc_malloc,
.buf_free = bc_free,
.send_request = bc_send_request,
@@ -2275,8 +2608,36 @@ static struct rpc_xprt_ops bc_tcp_ops = {
.print_stats = xs_tcp_print_stats,
};
+static int xs_init_anyaddr(const int family, struct sockaddr *sap)
+{
+ static const struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ .sin_addr.s_addr = htonl(INADDR_ANY),
+ };
+ static const struct sockaddr_in6 sin6 = {
+ .sin6_family = AF_INET6,
+ .sin6_addr = IN6ADDR_ANY_INIT,
+ };
+
+ switch (family) {
+ case AF_LOCAL:
+ break;
+ case AF_INET:
+ memcpy(sap, &sin, sizeof(sin));
+ break;
+ case AF_INET6:
+ memcpy(sap, &sin6, sizeof(sin6));
+ break;
+ default:
+ dprintk("RPC: %s: Bad address family\n", __func__);
+ return -EAFNOSUPPORT;
+ }
+ return 0;
+}
+
static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args,
- unsigned int slot_table_size)
+ unsigned int slot_table_size,
+ unsigned int max_slot_table_size)
{
struct rpc_xprt *xprt;
struct sock_xprt *new;
@@ -2286,31 +2647,101 @@ static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args,
return ERR_PTR(-EBADF);
}
- new = kzalloc(sizeof(*new), GFP_KERNEL);
- if (new == NULL) {
+ xprt = xprt_alloc(args->net, sizeof(*new), slot_table_size,
+ max_slot_table_size);
+ if (xprt == NULL) {
dprintk("RPC: xs_setup_xprt: couldn't allocate "
"rpc_xprt\n");
return ERR_PTR(-ENOMEM);
}
- xprt = &new->xprt;
-
- xprt->max_reqs = slot_table_size;
- xprt->slot = kcalloc(xprt->max_reqs, sizeof(struct rpc_rqst), GFP_KERNEL);
- if (xprt->slot == NULL) {
- kfree(xprt);
- dprintk("RPC: xs_setup_xprt: couldn't allocate slot "
- "table\n");
- return ERR_PTR(-ENOMEM);
- }
+ new = container_of(xprt, struct sock_xprt, xprt);
memcpy(&xprt->addr, args->dstaddr, args->addrlen);
xprt->addrlen = args->addrlen;
if (args->srcaddr)
memcpy(&new->srcaddr, args->srcaddr, args->addrlen);
+ else {
+ int err;
+ err = xs_init_anyaddr(args->dstaddr->sa_family,
+ (struct sockaddr *)&new->srcaddr);
+ if (err != 0) {
+ xprt_free(xprt);
+ return ERR_PTR(err);
+ }
+ }
return xprt;
}
+static const struct rpc_timeout xs_local_default_timeout = {
+ .to_initval = 10 * HZ,
+ .to_maxval = 10 * HZ,
+ .to_retries = 2,
+};
+
+/**
+ * xs_setup_local - Set up transport to use an AF_LOCAL socket
+ * @args: rpc transport creation arguments
+ *
+ * AF_LOCAL is a "tpi_cots_ord" transport, just like TCP
+ */
+static struct rpc_xprt *xs_setup_local(struct xprt_create *args)
+{
+ struct sockaddr_un *sun = (struct sockaddr_un *)args->dstaddr;
+ struct sock_xprt *transport;
+ struct rpc_xprt *xprt;
+ struct rpc_xprt *ret;
+
+ xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries,
+ xprt_max_tcp_slot_table_entries);
+ if (IS_ERR(xprt))
+ return xprt;
+ 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;
+ xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
+ xprt->idle_timeout = XS_IDLE_DISC_TO;
+
+ xprt->ops = &xs_local_ops;
+ xprt->timeout = &xs_local_default_timeout;
+
+ INIT_DELAYED_WORK(&transport->connect_worker,
+ xs_dummy_setup_socket);
+
+ switch (sun->sun_family) {
+ case AF_LOCAL:
+ if (sun->sun_path[0] != '/') {
+ dprintk("RPC: bad AF_LOCAL address: %s\n",
+ sun->sun_path);
+ ret = ERR_PTR(-EINVAL);
+ goto out_err;
+ }
+ xprt_set_bound(xprt);
+ xs_format_peer_addresses(xprt, "local", RPCBIND_NETID_LOCAL);
+ ret = ERR_PTR(xs_local_setup_socket(transport));
+ if (ret)
+ goto out_err;
+ break;
+ default:
+ ret = ERR_PTR(-EAFNOSUPPORT);
+ goto out_err;
+ }
+
+ dprintk("RPC: set up xprt to %s via AF_LOCAL\n",
+ xprt->address_strings[RPC_DISPLAY_ADDR]);
+
+ if (try_module_get(THIS_MODULE))
+ return xprt;
+ ret = ERR_PTR(-EINVAL);
+out_err:
+ xs_xprt_free(xprt);
+ return ret;
+}
+
static const struct rpc_timeout xs_udp_default_timeout = {
.to_initval = 5 * HZ,
.to_maxval = 30 * HZ,
@@ -2328,8 +2759,10 @@ static struct rpc_xprt *xs_setup_udp(struct xprt_create *args)
struct sockaddr *addr = args->dstaddr;
struct rpc_xprt *xprt;
struct sock_xprt *transport;
+ struct rpc_xprt *ret;
- xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries);
+ xprt = xs_setup_xprt(args, xprt_udp_slot_table_entries,
+ xprt_udp_slot_table_entries);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);
@@ -2340,7 +2773,6 @@ static struct rpc_xprt *xs_setup_udp(struct xprt_create *args)
xprt->max_payload = (1U << 16) - (MAX_HEADER << 3);
xprt->bind_timeout = XS_BIND_TO;
- xprt->connect_timeout = XS_UDP_CONN_TO;
xprt->reestablish_timeout = XS_UDP_REEST_TO;
xprt->idle_timeout = XS_IDLE_DISC_TO;
@@ -2354,7 +2786,7 @@ static struct rpc_xprt *xs_setup_udp(struct xprt_create *args)
xprt_set_bound(xprt);
INIT_DELAYED_WORK(&transport->connect_worker,
- xs_udp_connect_worker4);
+ xs_udp_setup_socket);
xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP);
break;
case AF_INET6:
@@ -2362,12 +2794,12 @@ static struct rpc_xprt *xs_setup_udp(struct xprt_create *args)
xprt_set_bound(xprt);
INIT_DELAYED_WORK(&transport->connect_worker,
- xs_udp_connect_worker6);
+ xs_udp_setup_socket);
xs_format_peer_addresses(xprt, "udp", RPCBIND_NETID_UDP6);
break;
default:
- kfree(xprt);
- return ERR_PTR(-EAFNOSUPPORT);
+ ret = ERR_PTR(-EAFNOSUPPORT);
+ goto out_err;
}
if (xprt_bound(xprt))
@@ -2382,10 +2814,10 @@ static struct rpc_xprt *xs_setup_udp(struct xprt_create *args)
if (try_module_get(THIS_MODULE))
return xprt;
-
- kfree(xprt->slot);
- kfree(xprt);
- return ERR_PTR(-EINVAL);
+ ret = ERR_PTR(-EINVAL);
+out_err:
+ xs_xprt_free(xprt);
+ return ret;
}
static const struct rpc_timeout xs_tcp_default_timeout = {
@@ -2404,8 +2836,14 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
struct sockaddr *addr = args->dstaddr;
struct rpc_xprt *xprt;
struct sock_xprt *transport;
+ struct rpc_xprt *ret;
+ unsigned int max_slot_table_size = xprt_max_tcp_slot_table_entries;
- xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
+ if (args->flags & XPRT_CREATE_INFINITE_SLOTS)
+ max_slot_table_size = RPC_MAX_SLOT_TABLE_LIMIT;
+
+ xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries,
+ max_slot_table_size);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);
@@ -2415,7 +2853,6 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
xprt->bind_timeout = XS_BIND_TO;
- xprt->connect_timeout = XS_TCP_CONN_TO;
xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
xprt->idle_timeout = XS_IDLE_DISC_TO;
@@ -2428,7 +2865,7 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
xprt_set_bound(xprt);
INIT_DELAYED_WORK(&transport->connect_worker,
- xs_tcp_connect_worker4);
+ xs_tcp_setup_socket);
xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP);
break;
case AF_INET6:
@@ -2436,12 +2873,12 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
xprt_set_bound(xprt);
INIT_DELAYED_WORK(&transport->connect_worker,
- xs_tcp_connect_worker6);
+ xs_tcp_setup_socket);
xs_format_peer_addresses(xprt, "tcp", RPCBIND_NETID_TCP6);
break;
default:
- kfree(xprt);
- return ERR_PTR(-EAFNOSUPPORT);
+ ret = ERR_PTR(-EAFNOSUPPORT);
+ goto out_err;
}
if (xprt_bound(xprt))
@@ -2454,13 +2891,12 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
xprt->address_strings[RPC_DISPLAY_ADDR],
xprt->address_strings[RPC_DISPLAY_PROTO]);
-
if (try_module_get(THIS_MODULE))
return xprt;
-
- kfree(xprt->slot);
- kfree(xprt);
- return ERR_PTR(-EINVAL);
+ ret = ERR_PTR(-EINVAL);
+out_err:
+ xs_xprt_free(xprt);
+ return ret;
}
/**
@@ -2474,11 +2910,10 @@ static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args)
struct rpc_xprt *xprt;
struct sock_xprt *transport;
struct svc_sock *bc_sock;
+ struct rpc_xprt *ret;
- if (!args->bc_xprt)
- ERR_PTR(-EINVAL);
-
- xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
+ xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries,
+ xprt_tcp_slot_table_entries);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);
@@ -2491,20 +2926,9 @@ static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args)
/* backchannel */
xprt_set_bound(xprt);
xprt->bind_timeout = 0;
- xprt->connect_timeout = 0;
xprt->reestablish_timeout = 0;
xprt->idle_timeout = 0;
- /*
- * The backchannel uses the same socket connection as the
- * forechannel
- */
- xprt->bc_xprt = args->bc_xprt;
- bc_sock = container_of(args->bc_xprt, struct svc_sock, sk_xprt);
- bc_sock->sk_bc_xprt = xprt;
- transport->sock = bc_sock->sk_sock;
- transport->inet = bc_sock->sk_sk;
-
xprt->ops = &bc_tcp_ops;
switch (addr->sa_family) {
@@ -2517,19 +2941,27 @@ static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args)
RPCBIND_NETID_TCP6);
break;
default:
- kfree(xprt);
- return ERR_PTR(-EAFNOSUPPORT);
+ ret = ERR_PTR(-EAFNOSUPPORT);
+ goto out_err;
}
- if (xprt_bound(xprt))
- dprintk("RPC: set up xprt to %s (port %s) via %s\n",
- xprt->address_strings[RPC_DISPLAY_ADDR],
- xprt->address_strings[RPC_DISPLAY_PORT],
- xprt->address_strings[RPC_DISPLAY_PROTO]);
- else
- dprintk("RPC: set up xprt to %s (autobind) via %s\n",
- xprt->address_strings[RPC_DISPLAY_ADDR],
- xprt->address_strings[RPC_DISPLAY_PROTO]);
+ dprintk("RPC: set up xprt to %s (port %s) via %s\n",
+ xprt->address_strings[RPC_DISPLAY_ADDR],
+ xprt->address_strings[RPC_DISPLAY_PORT],
+ xprt->address_strings[RPC_DISPLAY_PROTO]);
+
+ /*
+ * Once we've associated a backchannel xprt with a connection,
+ * we want to keep it around as long as the connection lasts,
+ * in case we need to start using it for a backchannel again;
+ * this reference won't be dropped until bc_xprt is destroyed.
+ */
+ xprt_get(xprt);
+ args->bc_xprt->xpt_bc_xprt = xprt;
+ xprt->bc_xprt = args->bc_xprt;
+ bc_sock = container_of(args->bc_xprt, struct svc_sock, sk_xprt);
+ transport->sock = bc_sock->sk_sock;
+ transport->inet = bc_sock->sk_sk;
/*
* Since we don't want connections for the backchannel, we set
@@ -2537,14 +2969,25 @@ static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args)
*/
xprt_set_connected(xprt);
-
if (try_module_get(THIS_MODULE))
return xprt;
- kfree(xprt->slot);
- kfree(xprt);
- return ERR_PTR(-EINVAL);
+
+ args->bc_xprt->xpt_bc_xprt = NULL;
+ xprt_put(xprt);
+ ret = ERR_PTR(-EINVAL);
+out_err:
+ xs_xprt_free(xprt);
+ return ret;
}
+static struct xprt_class xs_local_transport = {
+ .list = LIST_HEAD_INIT(xs_local_transport.list),
+ .name = "named UNIX socket",
+ .owner = THIS_MODULE,
+ .ident = XPRT_TRANSPORT_LOCAL,
+ .setup = xs_setup_local,
+};
+
static struct xprt_class xs_udp_transport = {
.list = LIST_HEAD_INIT(xs_udp_transport.list),
.name = "udp",
@@ -2580,6 +3023,7 @@ int init_socket_xprt(void)
sunrpc_table_header = register_sysctl_table(sunrpc_table);
#endif
+ xprt_register_transport(&xs_local_transport);
xprt_register_transport(&xs_udp_transport);
xprt_register_transport(&xs_tcp_transport);
xprt_register_transport(&xs_bc_tcp_transport);
@@ -2600,12 +3044,14 @@ void cleanup_socket_xprt(void)
}
#endif
+ xprt_unregister_transport(&xs_local_transport);
xprt_unregister_transport(&xs_udp_transport);
xprt_unregister_transport(&xs_tcp_transport);
xprt_unregister_transport(&xs_bc_tcp_transport);
}
-static int param_set_uint_minmax(const char *val, struct kernel_param *kp,
+static int param_set_uint_minmax(const char *val,
+ const struct kernel_param *kp,
unsigned int min, unsigned int max)
{
unsigned long num;
@@ -2620,39 +3066,60 @@ static int param_set_uint_minmax(const char *val, struct kernel_param *kp,
return 0;
}
-static int param_set_portnr(const char *val, struct kernel_param *kp)
+static int param_set_portnr(const char *val, const struct kernel_param *kp)
{
return param_set_uint_minmax(val, kp,
RPC_MIN_RESVPORT,
RPC_MAX_RESVPORT);
}
-static int param_get_portnr(char *buffer, struct kernel_param *kp)
-{
- return param_get_uint(buffer, kp);
-}
+static struct kernel_param_ops param_ops_portnr = {
+ .set = param_set_portnr,
+ .get = param_get_uint,
+};
+
#define param_check_portnr(name, p) \
__param_check(name, p, unsigned int);
module_param_named(min_resvport, xprt_min_resvport, portnr, 0644);
module_param_named(max_resvport, xprt_max_resvport, portnr, 0644);
-static int param_set_slot_table_size(const char *val, struct kernel_param *kp)
+static int param_set_slot_table_size(const char *val,
+ const struct kernel_param *kp)
{
return param_set_uint_minmax(val, kp,
RPC_MIN_SLOT_TABLE,
RPC_MAX_SLOT_TABLE);
}
-static int param_get_slot_table_size(char *buffer, struct kernel_param *kp)
+static struct kernel_param_ops param_ops_slot_table_size = {
+ .set = param_set_slot_table_size,
+ .get = param_get_uint,
+};
+
+#define param_check_slot_table_size(name, p) \
+ __param_check(name, p, unsigned int);
+
+static int param_set_max_slot_table_size(const char *val,
+ const struct kernel_param *kp)
{
- return param_get_uint(buffer, kp);
+ return param_set_uint_minmax(val, kp,
+ RPC_MIN_SLOT_TABLE,
+ RPC_MAX_SLOT_TABLE_LIMIT);
}
-#define param_check_slot_table_size(name, p) \
+
+static struct kernel_param_ops param_ops_max_slot_table_size = {
+ .set = param_set_max_slot_table_size,
+ .get = param_get_uint,
+};
+
+#define param_check_max_slot_table_size(name, p) \
__param_check(name, p, unsigned int);
module_param_named(tcp_slot_table_entries, xprt_tcp_slot_table_entries,
slot_table_size, 0644);
+module_param_named(tcp_max_slot_table_entries, xprt_max_tcp_slot_table_entries,
+ max_slot_table_size, 0644);
module_param_named(udp_slot_table_entries, xprt_udp_slot_table_entries,
slot_table_size, 0644);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 06:56:37 +0000