From patchwork Thu Apr 11 16:47:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 13626414 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B35C738DF7; Thu, 11 Apr 2024 16:48:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712854087; cv=none; b=RVUsmE94L8LD3lpARsxq6qOZTTEYvRh6N/hg3FA+GqhzFAY4vdKeJ2HJi0tM60HGa7LZ2eluKRFvB5oTfxkdukqtUDPz3O7Ar5Gj3gQDMD2DZWtOOkdex+wOiPeooR+9+sZJjQFNb6xJajFaJs/J2R5c7N+2zfkXGsQpyfP3BFg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712854087; c=relaxed/simple; bh=u1MIVeEB9jfAKl7VCceRlD6fHf4D2LjW0+JisF5Qw84=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NjEWdPDEi613ffBOT9m+Ci/2YIDxB9QJ98AZfFwuQBp6SGq9vEe2xtnjZ/CWo8wTVU66t3vUrnbWhIg3HFfDztPVwHQGTDvAJiLULp+PgQYke3jcG1E/9ABz3udb1cRwh2bl6i+5ey82U81NJWGEFfmAn8nVGGD9c53LadcfKTY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JhgrSfST; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JhgrSfST" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3DF48C072AA; Thu, 11 Apr 2024 16:48:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712854087; bh=u1MIVeEB9jfAKl7VCceRlD6fHf4D2LjW0+JisF5Qw84=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JhgrSfSTgNVk39AKHOHrzCWiYVjfc/zcifzETcDz/Lje4edxiRz7A+njEiokZa8Py XjcgyeKDNIqlyu63lEWKvIEK52jxTzu9BI9Sb5HLojLQ9pUTwgyYJ0UvrbiNDP4hwS 9jozCHVbms2PRbHURlsAWq4JN8vfxsDdPRUmQh5IK3pG27fO1+0NUgrmR2VVKEUc9B U/SqRJ/+6xDAKcWRcbsA8hPlFqdlssxBZ5+q3MlKZTh0V3sRPRs2el8fjv3/DT+8Sh Z+k4rZelVx0PvUMCwxIy80qhSSEtbDwNw7S2ZpKGYBwgBDpHWx97itY6RRE5kKeGLM yXvDnI+xRdhbA== From: Lorenzo Bianconi To: linux-nfs@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, chuck.lever@oracle.com, jlayton@kernel.org, neilb@suse.de, netdev@vger.kernel.org, kuba@kernel.org Subject: [PATCH v7 4/5] SUNRPC: add a new svc_find_listener helper Date: Thu, 11 Apr 2024 18:47:27 +0200 Message-ID: X-Mailer: git-send-email 2.44.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Jeff Layton 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 Signed-off-by: Lorenzo Bianconi --- 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