SUNRPC: add links for all client xprts to debugfs (2f34b8bf) · Commits · 戴 / test

net/sunrpc/debugfs.c

+29 −17

Original line number	Diff line number	Diff line
		@@ -118,12 +118,38 @@ static const struct file_operations tasks_fops = {
		.release = tasks_release,
		};

		static int do_xprt_debugfs(struct rpc_clnt clnt, struct rpc_xprt xprt, void *numv)
		{
		int len;
		char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
		char link[9]; /* enough for 8 hex digits + NULL */
		int *nump = numv;

		if (IS_ERR_OR_NULL(xprt->debugfs))
		return 0;
		len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
		xprt->debugfs->d_name.name);
		if (len > sizeof(name))
		return -1;
		if (*nump == 0)
		strcpy(link, "xprt");
		else {
		len = snprintf(link, sizeof(link), "xprt%d", *nump);
		if (len > sizeof(link))
		return -1;
		}
		if (!debugfs_create_symlink(link, clnt->cl_debugfs, name))
		return -1;
		(*nump)++;
		return 0;
		}

		void
		rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
		{
		int len;
		char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
		struct rpc_xprt *xprt;
		char name[9]; /* enough for 8 hex digits + NULL */
		int xprtnum = 0;

		/* Already registered? */
		if (clnt->cl_debugfs \|\| !rpc_clnt_dir)
		@@ -143,21 +169,7 @@ rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
		clnt, &tasks_fops))
		goto out_err;

		rcu_read_lock();
		xprt = rcu_dereference(clnt->cl_xprt);
		/* no "debugfs" dentry? Don't bother with the symlink. */
		if (IS_ERR_OR_NULL(xprt->debugfs)) {
		rcu_read_unlock();
		return;
		}
		len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
		xprt->debugfs->d_name.name);
		rcu_read_unlock();

		if (len >= sizeof(name))
		goto out_err;

		if (!debugfs_create_symlink("xprt", clnt->cl_debugfs, name))
		if (rpc_clnt_iterate_for_each_xprt(clnt, do_xprt_debugfs, &xprtnum) < 0)
		goto out_err;

		return;

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