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SUNRPC: Clean up transport write space handling

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Treat socket write space handling in the same way we now treat transport
congestion: by denying the XPRT_LOCK until the transport signals that it
has free buffer space.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust
2018-09-03 23:39:27 -04:00
parent 36bd7de949
commit c544577dad
8 changed files with 73 additions and 82 deletions
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1
include/linux/sunrpc/svc_xprt.h
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@@ -84,7 +84,6 @@ struct svc_xprt {
struct sockaddr_storage xpt_remote; /* remote peer's address */
size_t xpt_remotelen; /* length of address */
char xpt_remotebuf[INET6_ADDRSTRLEN + 10];
struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */
struct list_head xpt_users; /* callbacks on free */
struct net *xpt_net;

5
include/linux/sunrpc/xprt.h
View File

@@ -387,8 +387,8 @@ int xprt_load_transport(const char *);
void xprt_set_retrans_timeout_def(struct rpc_task *task);
void xprt_set_retrans_timeout_rtt(struct rpc_task *task);
void xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);
void xprt_wait_for_buffer_space(struct rpc_task *task, rpc_action action);
void xprt_write_space(struct rpc_xprt *xprt);
void xprt_wait_for_buffer_space(struct rpc_xprt *xprt);
bool xprt_write_space(struct rpc_xprt *xprt);
void xprt_adjust_cwnd(struct rpc_xprt *xprt, struct rpc_task *task, int result);
struct rpc_rqst * xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid);
void xprt_update_rtt(struct rpc_task *task);
@@ -416,6 +416,7 @@ void xprt_unlock_connect(struct rpc_xprt *, void *);
#define XPRT_CLOSING (6)
#define XPRT_CONGESTED (9)
#define XPRT_CWND_WAIT (10)
#define XPRT_WRITE_SPACE (11)
static inline void xprt_set_connected(struct rpc_xprt *xprt)
{