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Message-ID: <00d60d4fb200e4d9762a03d0b561a61e92c7b071.1713209938.git.lorenzo@kernel.org>
Date: Mon, 15 Apr 2024 21:44:38 +0200
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: linux-nfs@...r.kernel.org
Cc: lorenzo.bianconi@...hat.com,
chuck.lever@...cle.com,
neilb@...e.de,
netdev@...r.kernel.org,
kuba@...nel.org,
jlayton@...nel.org
Subject: [PATCH v8 5/6] SUNRPC: add a new svc_find_listener helper
From: Jeff Layton <jlayton@...nel.org>
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@...nel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
include/linux/sunrpc/svc_xprt.h | 2 ++
net/sunrpc/svc_xprt.c | 34 +++++++++++++++++++++++++++++++++
2 files changed, 36 insertions(+)
diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h
index 0d9b10dbe07d..0981e35a9fed 100644
--- a/include/linux/sunrpc/svc_xprt.h
+++ b/include/linux/sunrpc/svc_xprt.h
@@ -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);
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 463fe544ae28..34a3626c56b1 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -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
--
2.44.0
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