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SUNRPC: Add a helper to return the transport identifier given a netid 

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2020-11-10 09:41:21 -05:00
parent 9bccd26461
commit 1fc5f13186
2 changed files with 25 additions and 7 deletions
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1
include/linux/sunrpc/xprt.h
View File

@ -386,6 +386,7 @@ xprt_disable_swap(struct rpc_xprt *xprt)
int xprt_register_transport(struct xprt_class *type);
int xprt_unregister_transport(struct xprt_class *type);
int xprt_load_transport(const char *);
int xprt_find_transport_ident(const char *);
void xprt_wait_for_reply_request_def(struct rpc_task *task);
void xprt_wait_for_reply_request_rtt(struct rpc_task *task);
void xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);

31
net/sunrpc/xprt.c
View File

@ -218,6 +218,28 @@ xprt_class_find_by_netid(const char *netid)
return t;
}
/**
* xprt_find_transport_ident - convert a netid into a transport identifier
* @netid: transport to load
*
* Returns:
* > 0: transport identifier
* -ENOENT: transport module not available
*/
int xprt_find_transport_ident(const char *netid)
{
const struct xprt_class *t;
int ret;
t = xprt_class_find_by_netid(netid);
if (!t)
return -ENOENT;
ret = t->ident;
xprt_class_release(t);
return ret;
}
EXPORT_SYMBOL_GPL(xprt_find_transport_ident);
/**
* xprt_load_transport - load a transport implementation
* @netid: transport to load
@ -228,13 +250,8 @@ xprt_class_find_by_netid(const char *netid)
*/
int xprt_load_transport(const char *netid)
{
const struct xprt_class *t;
t = xprt_class_find_by_netid(netid);
if (!t)
return -ENOENT;
xprt_class_release(t);
return 0;
int ret = xprt_find_transport_ident(netid);
return ret < 0 ? ret : 0;
}
EXPORT_SYMBOL_GPL(xprt_load_transport);