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yaml
---
r: 42545
b: refs/heads/master
c: e136d09
h: refs/heads/master
i:
  42543: d32e417
v: v3
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Chuck Lever authored and Trond Myklebust committed Dec 6, 2006
1 parent fc0c557 commit 0a1381a
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Showing 3 changed files with 30 additions and 26 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 51971139b2342fa1005e87bbfcb52305da3fe891
refs/heads/master: e136d0926ef6a048f6e65b35263c0a9faae3abbe
5 changes: 0 additions & 5 deletions trunk/include/linux/sunrpc/xprt.h
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Original file line number Diff line number Diff line change
Expand Up @@ -203,11 +203,6 @@ struct rpc_xprt {
char * address_strings[RPC_DISPLAY_MAX];
};

#define XPRT_LAST_FRAG (1 << 0)
#define XPRT_COPY_RECM (1 << 1)
#define XPRT_COPY_XID (1 << 2)
#define XPRT_COPY_DATA (1 << 3)

#ifdef __KERNEL__

/*
Expand Down
49 changes: 29 additions & 20 deletions trunk/net/sunrpc/xprtsock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -147,6 +147,14 @@ struct sock_xprt {
tcp_flags;
};

/*
* TCP receive state flags
*/
#define TCP_RCV_LAST_FRAG (1UL << 0)
#define TCP_RCV_COPY_FRAGHDR (1UL << 1)
#define TCP_RCV_COPY_XID (1UL << 2)
#define TCP_RCV_COPY_DATA (1UL << 3)

static void xs_format_peer_addresses(struct rpc_xprt *xprt)
{
struct sockaddr_in *addr = (struct sockaddr_in *) &xprt->addr;
Expand Down Expand Up @@ -653,12 +661,12 @@ static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, skb_reader_t *desc

transport->tcp_reclen = ntohl(transport->tcp_fraghdr);
if (transport->tcp_reclen & RPC_LAST_STREAM_FRAGMENT)
transport->tcp_flags |= XPRT_LAST_FRAG;
transport->tcp_flags |= TCP_RCV_LAST_FRAG;
else
transport->tcp_flags &= ~XPRT_LAST_FRAG;
transport->tcp_flags &= ~TCP_RCV_LAST_FRAG;
transport->tcp_reclen &= RPC_FRAGMENT_SIZE_MASK;

transport->tcp_flags &= ~XPRT_COPY_RECM;
transport->tcp_flags &= ~TCP_RCV_COPY_FRAGHDR;
transport->tcp_offset = 0;

/* Sanity check of the record length */
Expand All @@ -674,11 +682,11 @@ static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, skb_reader_t *desc
static void xs_tcp_check_fraghdr(struct sock_xprt *transport)
{
if (transport->tcp_offset == transport->tcp_reclen) {
transport->tcp_flags |= XPRT_COPY_RECM;
transport->tcp_flags |= TCP_RCV_COPY_FRAGHDR;
transport->tcp_offset = 0;
if (transport->tcp_flags & XPRT_LAST_FRAG) {
transport->tcp_flags &= ~XPRT_COPY_DATA;
transport->tcp_flags |= XPRT_COPY_XID;
if (transport->tcp_flags & TCP_RCV_LAST_FRAG) {
transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
transport->tcp_flags |= TCP_RCV_COPY_XID;
transport->tcp_copied = 0;
}
}
Expand All @@ -696,8 +704,8 @@ static inline void xs_tcp_read_xid(struct sock_xprt *transport, skb_reader_t *de
transport->tcp_offset += used;
if (used != len)
return;
transport->tcp_flags &= ~XPRT_COPY_XID;
transport->tcp_flags |= XPRT_COPY_DATA;
transport->tcp_flags &= ~TCP_RCV_COPY_XID;
transport->tcp_flags |= TCP_RCV_COPY_DATA;
transport->tcp_copied = 4;
dprintk("RPC: reading reply for XID %08x\n",
ntohl(transport->tcp_xid));
Expand All @@ -716,7 +724,7 @@ static inline void xs_tcp_read_request(struct rpc_xprt *xprt, skb_reader_t *desc
spin_lock(&xprt->transport_lock);
req = xprt_lookup_rqst(xprt, transport->tcp_xid);
if (!req) {
transport->tcp_flags &= ~XPRT_COPY_DATA;
transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
dprintk("RPC: XID %08x request not found!\n",
ntohl(transport->tcp_xid));
spin_unlock(&xprt->transport_lock);
Expand Down Expand Up @@ -747,13 +755,13 @@ static inline void xs_tcp_read_request(struct rpc_xprt *xprt, skb_reader_t *desc
/* Error when copying to the receive buffer,
* usually because we weren't able to allocate
* additional buffer pages. All we can do now
* is turn off XPRT_COPY_DATA, so the request
* is turn off TCP_RCV_COPY_DATA, so the request
* will not receive any additional updates,
* and time out.
* Any remaining data from this record will
* be discarded.
*/
transport->tcp_flags &= ~XPRT_COPY_DATA;
transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
dprintk("RPC: XID %08x truncated request\n",
ntohl(transport->tcp_xid));
dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, tcp_reclen = %u\n",
Expand All @@ -769,14 +777,14 @@ static inline void xs_tcp_read_request(struct rpc_xprt *xprt, skb_reader_t *desc
transport->tcp_reclen);

if (transport->tcp_copied == req->rq_private_buf.buflen)
transport->tcp_flags &= ~XPRT_COPY_DATA;
transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
else if (transport->tcp_offset == transport->tcp_reclen) {
if (transport->tcp_flags & XPRT_LAST_FRAG)
transport->tcp_flags &= ~XPRT_COPY_DATA;
if (transport->tcp_flags & TCP_RCV_LAST_FRAG)
transport->tcp_flags &= ~TCP_RCV_COPY_DATA;
}

out:
if (!(transport->tcp_flags & XPRT_COPY_DATA))
if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
xprt_complete_rqst(req->rq_task, transport->tcp_copied);
spin_unlock(&xprt->transport_lock);
xs_tcp_check_fraghdr(transport);
Expand Down Expand Up @@ -810,17 +818,17 @@ static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, uns
do {
/* Read in a new fragment marker if necessary */
/* Can we ever really expect to get completely empty fragments? */
if (transport->tcp_flags & XPRT_COPY_RECM) {
if (transport->tcp_flags & TCP_RCV_COPY_FRAGHDR) {
xs_tcp_read_fraghdr(xprt, &desc);
continue;
}
/* Read in the xid if necessary */
if (transport->tcp_flags & XPRT_COPY_XID) {
if (transport->tcp_flags & TCP_RCV_COPY_XID) {
xs_tcp_read_xid(transport, &desc);
continue;
}
/* Read in the request data */
if (transport->tcp_flags & XPRT_COPY_DATA) {
if (transport->tcp_flags & TCP_RCV_COPY_DATA) {
xs_tcp_read_request(xprt, &desc);
continue;
}
Expand Down Expand Up @@ -886,7 +894,8 @@ static void xs_tcp_state_change(struct sock *sk)
transport->tcp_offset = 0;
transport->tcp_reclen = 0;
transport->tcp_copied = 0;
transport->tcp_flags = XPRT_COPY_RECM | XPRT_COPY_XID;
transport->tcp_flags =
TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID;

xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
xprt_wake_pending_tasks(xprt, 0);
Expand Down

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