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SUNRPC: Add srcaddr as a file in sysfs 

I don't support changing it right now, but it could be useful
information for clients with multiple network cards.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Anna Schumaker 2021-07-29 16:45:23 -04:00
parent 5d46dd04cb
commit e44773daf8
1 changed files with 26 additions and 0 deletions
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26
net/sunrpc/sysfs.c
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@ -100,6 +100,28 @@ static ssize_t rpc_sysfs_xprt_dstaddr_show(struct kobject *kobj,
return ret + 1;
}
static ssize_t rpc_sysfs_xprt_srcaddr_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
struct sockaddr_storage saddr;
struct sock_xprt *sock;
ssize_t ret = -1;
if (!xprt)
return 0;
sock = container_of(xprt, struct sock_xprt, xprt);
if (kernel_getsockname(sock->sock, (struct sockaddr *)&saddr) < 0)
goto out;
ret = sprintf(buf, "%pISc\n", &saddr);
out:
xprt_put(xprt);
return ret + 1;
}
static ssize_t rpc_sysfs_xprt_info_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
@ -376,6 +398,9 @@ static const void *rpc_sysfs_xprt_namespace(struct kobject *kobj)
static struct kobj_attribute rpc_sysfs_xprt_dstaddr = __ATTR(dstaddr,
0644, rpc_sysfs_xprt_dstaddr_show, rpc_sysfs_xprt_dstaddr_store);
static struct kobj_attribute rpc_sysfs_xprt_srcaddr = __ATTR(srcaddr,
0644, rpc_sysfs_xprt_srcaddr_show, NULL);
static struct kobj_attribute rpc_sysfs_xprt_info = __ATTR(xprt_info,
0444, rpc_sysfs_xprt_info_show, NULL);
@ -384,6 +409,7 @@ static struct kobj_attribute rpc_sysfs_xprt_change_state = __ATTR(xprt_state,
static struct attribute *rpc_sysfs_xprt_attrs[] = {
&rpc_sysfs_xprt_dstaddr.attr,
&rpc_sysfs_xprt_srcaddr.attr,
&rpc_sysfs_xprt_info.attr,
&rpc_sysfs_xprt_change_state.attr,
NULL,