From: Olga Kornievskaia <kolga@xxxxxxxxxx>
Allow to query and set the destination's address of a transport.
Setting of the destination address is allowed only for TCP or RDMA
based connections.
Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx>
---
net/sunrpc/sysfs.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
diff --git a/net/sunrpc/sysfs.c b/net/sunrpc/sysfs.c
index 682def4293f2..076f777db3cd 100644
--- a/net/sunrpc/sysfs.c
+++ b/net/sunrpc/sysfs.c
@@ -4,6 +4,9 @@
*/
#include <linux/sunrpc/clnt.h>
#include <linux/kobject.h>
+#include <linux/sunrpc/addr.h>
+#include <linux/sunrpc/xprtsock.h>
+
#include "sysfs.h"
static struct kset *rpc_sunrpc_kset;
@@ -42,6 +45,66 @@ static struct kobject *rpc_sysfs_object_alloc(const char *name,
return NULL;
}
+static inline struct rpc_xprt *
+rpc_sysfs_xprt_kobj_get_xprt(struct kobject *kobj)
+{
+ struct rpc_sysfs_xprt_switch_xprt *x = container_of(kobj,
+ struct rpc_sysfs_xprt_switch_xprt, kobject);
+
+ return xprt_get(x->xprt);
+}
+
+static ssize_t rpc_sysfs_xprt_dstaddr_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf)
+{
+ struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
+ ssize_t ret;
+
+ if (!xprt)
+ return 0;
+ if (xprt->xprt_class->ident == XPRT_TRANSPORT_LOCAL)
+ ret = sprintf(buf, "localhost");
+ else
+ ret = rpc_ntop((struct sockaddr *)&xprt->addr, buf, PAGE_SIZE);
+ buf[ret] = '\n';
+ xprt_put(xprt);
+ return ret + 1;
+}
+
+static ssize_t rpc_sysfs_xprt_dstaddr_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
+ struct sockaddr *saddr;
+ int port;
+
+ if (!xprt)
+ return 0;
+ if (!(xprt->xprt_class->ident == XPRT_TRANSPORT_TCP ||
+ xprt->xprt_class->ident == XPRT_TRANSPORT_RDMA)) {
+ xprt_put(xprt);
+ return -EOPNOTSUPP;
+ }
+
+ wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE);
+ saddr = (struct sockaddr *)&xprt->addr;
+ port = rpc_get_port(saddr);
+
+ kfree(xprt->address_strings[RPC_DISPLAY_ADDR]);
+ xprt->address_strings[RPC_DISPLAY_ADDR] = kstrndup(buf, count - 1,
+ GFP_KERNEL);
+ xprt->addrlen = rpc_pton(xprt->xprt_net, buf, count - 1, saddr,
+ sizeof(*saddr));
+ rpc_set_port(saddr, port);
+
+ xprt->ops->connect(xprt, NULL);
+ clear_bit(XPRT_LOCKED, &xprt->state);
+ xprt_put(xprt);
+ return count;
+}
+
int rpc_sysfs_init(void)
{
rpc_sunrpc_kset = kset_create_and_add("sunrpc", NULL, kernel_kobj);
@@ -105,6 +168,14 @@ static const void *rpc_sysfs_xprt_switch_xprt_namespace(struct kobject *kobj)
kobject)->net;
}
+static struct kobj_attribute rpc_sysfs_xprt_dstaddr = __ATTR(dstaddr,
+ 0644, rpc_sysfs_xprt_dstaddr_show, rpc_sysfs_xprt_dstaddr_store);
+
+static struct attribute *rpc_sysfs_xprt_attrs[] = {
+ &rpc_sysfs_xprt_dstaddr.attr,
+ NULL,
+};
+
static struct kobj_type rpc_sysfs_client_type = {
.release = rpc_sysfs_client_release,
.sysfs_ops = &kobj_sysfs_ops,
@@ -119,6 +190,7 @@ static struct kobj_type rpc_sysfs_xprt_switch_type = {
static struct kobj_type rpc_sysfs_xprt_switch_xprt_type = {
.release = rpc_sysfs_xprt_switch_xprt_release,
+ .default_attrs = rpc_sysfs_xprt_attrs,
.sysfs_ops = &kobj_sysfs_ops,
.namespace = rpc_sysfs_xprt_switch_xprt_namespace,
};
--
2.27.0
