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SUNRPC: Export svc_xprt_received()

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Prepare svc_xprt_received() to be called from transport code instead
of from generic RPC server code.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2021-01-29 13:04:04 -05:00
parent cc93ce9529
commit 7dcfbd86ad
3 changed files with 11 additions and 4 deletions
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1
include/linux/sunrpc/svc_xprt.h
View File

@ -130,6 +130,7 @@ void svc_xprt_init(struct net *, struct svc_xprt_class *, struct svc_xprt *,
int svc_create_xprt(struct svc_serv *, const char *, struct net *,
const int, const unsigned short, int,
const struct cred *);
void svc_xprt_received(struct svc_xprt *xprt);
void svc_xprt_do_enqueue(struct svc_xprt *xprt);
void svc_xprt_enqueue(struct svc_xprt *xprt);
void svc_xprt_put(struct svc_xprt *xprt);

1
include/trace/events/sunrpc.h
View File

@ -1781,6 +1781,7 @@ DECLARE_EVENT_CLASS(svc_xprt_event,
), \
TP_ARGS(xprt))
DEFINE_SVC_XPRT_EVENT(received);
DEFINE_SVC_XPRT_EVENT(no_write_space);
DEFINE_SVC_XPRT_EVENT(close);
DEFINE_SVC_XPRT_EVENT(detach);

13
net/sunrpc/svc_xprt.c
View File

@ -247,21 +247,25 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
return xprt;
}
/*
* svc_xprt_received conditionally queues the transport for processing
* by another thread. The caller must hold the XPT_BUSY bit and must
/**
* svc_xprt_received - start next receiver thread
* @xprt: controlling transport
*
* The caller must hold the XPT_BUSY bit and must
* not thereafter touch transport data.
*
* Note: XPT_DATA only gets cleared when a read-attempt finds no (or
* insufficient) data.
*/
static void svc_xprt_received(struct svc_xprt *xprt)
void svc_xprt_received(struct svc_xprt *xprt)
{
if (!test_bit(XPT_BUSY, &xprt->xpt_flags)) {
WARN_ONCE(1, "xprt=0x%p already busy!", xprt);
return;
}
trace_svc_xprt_received(xprt);
/* As soon as we clear busy, the xprt could be closed and
* 'put', so we need a reference to call svc_enqueue_xprt with:
*/
@ -271,6 +275,7 @@ static void svc_xprt_received(struct svc_xprt *xprt)
xprt->xpt_server->sv_ops->svo_enqueue_xprt(xprt);
svc_xprt_put(xprt);
}
EXPORT_SYMBOL_GPL(svc_xprt_received);
void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *new)
{