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SUNRPC: add a new svc_find_listener helper

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svc_find_listener will return the transport instance pointer for the
endpoint accepting connections/peer traffic from the specified transport
class and matching sockaddr.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Jeff Layton 2024-04-23 15:25:43 +02:00 committed by Chuck Lever
parent a79ec2aecb
commit cf619507ae
2 changed files with 36 additions and 0 deletions
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2
include/linux/sunrpc/svc_xprt.h
View File

@ -150,6 +150,8 @@ void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
void svc_xprt_close(struct svc_xprt *xprt);
int svc_port_is_privileged(struct sockaddr *sin);
int svc_print_xprts(char *buf, int maxlen);
struct svc_xprt *svc_find_listener(struct svc_serv *serv, const char *xcl_name,
struct net *net, const struct sockaddr *sa);
struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
struct net *net, const sa_family_t af,
const unsigned short port);

34
net/sunrpc/svc_xprt.c
View File

@ -1276,6 +1276,40 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt)
return dr;
}
/**
* svc_find_listener - find an RPC transport instance
* @serv: pointer to svc_serv to search
* @xcl_name: C string containing transport's class name
* @net: owner net pointer
* @sa: sockaddr containing address
*
* Return the transport instance pointer for the endpoint accepting
* connections/peer traffic from the specified transport class,
* and matching sockaddr.
*/
struct svc_xprt *svc_find_listener(struct svc_serv *serv, const char *xcl_name,
struct net *net, const struct sockaddr *sa)
{
struct svc_xprt *xprt;
struct svc_xprt *found = NULL;
spin_lock_bh(&serv->sv_lock);
list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list) {
if (xprt->xpt_net != net)
continue;
if (strcmp(xprt->xpt_class->xcl_name, xcl_name))
continue;
if (!rpc_cmp_addr_port(sa, (struct sockaddr *)&xprt->xpt_local))
continue;
found = xprt;
svc_xprt_get(xprt);
break;
}
spin_unlock_bh(&serv->sv_lock);
return found;
}
EXPORT_SYMBOL_GPL(svc_find_listener);
/**
* svc_find_xprt - find an RPC transport instance
* @serv: pointer to svc_serv to search