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sunrpc: add a debugfs rpc_xprt directory with an info file in it

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Add a new directory heirarchy under the debugfs sunrpc/ directory:

    sunrpc/
        rpc_xprt/
            <xprt id>/

Within that directory, we can put files that give info about the
xprts. We do have the (minor) problem that there is no succinct,
unique identifier for rpc_xprts. So we generate them synthetically
with a static atomic_t counter.

For now, this directory just holds an "info" file, but we may add
other files to it in the future.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Jeff Layton
2014-11-26 14:44:44 -05:00
committed by Trond Myklebust
parent b4b9d2ccf0
commit 388f0c7767
4 changed files with 134 additions and 7 deletions
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8
net/sunrpc/xprt.c
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@@ -1303,6 +1303,7 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net)
*/
struct rpc_xprt *xprt_create_transport(struct xprt_create *args)
{
int err;
struct rpc_xprt *xprt;
struct xprt_class *t;
@@ -1343,6 +1344,12 @@ found:
return ERR_PTR(-ENOMEM);
}
err = rpc_xprt_debugfs_register(xprt);
if (err) {
xprt_destroy(xprt);
return ERR_PTR(err);
}
dprintk("RPC: created transport %p with %u slots\n", xprt,
xprt->max_reqs);
out:
@@ -1359,6 +1366,7 @@ static void xprt_destroy(struct rpc_xprt *xprt)
dprintk("RPC: destroying transport %p\n", xprt);
del_timer_sync(&xprt->timer);
rpc_xprt_debugfs_unregister(xprt);
rpc_destroy_wait_queue(&xprt->binding);
rpc_destroy_wait_queue(&xprt->pending);
rpc_destroy_wait_queue(&xprt->sending);