From patchwork Thu May 16 01:20:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bruce Fields X-Patchwork-Id: 10945467 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5A966912 for ; Thu, 16 May 2019 01:48:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 49BCA2874A for ; Thu, 16 May 2019 01:48:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3E69E28866; Thu, 16 May 2019 01:48:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CD19D28871 for ; Thu, 16 May 2019 01:48:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726969AbfEPBqj (ORCPT ); Wed, 15 May 2019 21:46:39 -0400 Received: from fieldses.org ([173.255.197.46]:33116 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727010AbfEPBWY (ORCPT ); Wed, 15 May 2019 21:22:24 -0400 Received: by fieldses.org (Postfix, from userid 2815) id 8179F20AE; Wed, 15 May 2019 21:20:23 -0400 (EDT) From: "J. Bruce Fields" To: linux-nfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, "J. Bruce Fields" Subject: [PATCH 08/12] nfsd: add more information to client info file Date: Wed, 15 May 2019 21:20:15 -0400 Message-Id: <1557969619-17157-11-git-send-email-bfields@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1557969619-17157-1-git-send-email-bfields@redhat.com> References: <1557969619-17157-1-git-send-email-bfields@redhat.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: "J. Bruce Fields" Add ip address, full client-provided identifier, and minor version. There's much more that could possibly be useful but this is a start. As with open owners, client identifiers are opaque binary data, but some clients happen to include useful information in ascii. Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4state.c | 18 ++++++++++++++++++ fs/seq_file.c | 17 +++++++++++++++++ include/linux/seq_file.h | 2 ++ 3 files changed, 37 insertions(+) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index c665ce9af773..876c035d2a91 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -42,6 +42,7 @@ #include #include #include +#include #include "xdr4.h" #include "xdr4cb.h" #include "vfs.h" @@ -2193,6 +2194,19 @@ find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) return s; } +static void seq_escape_quotable_mem(struct seq_file *m, char *data, int len) +{ + /* List taken from kstrdup_quotable: */ + seq_escape_mem(m, data, len, ESCAPE_HEX, "\f\n\r\t\v\a\e\\\""); +} + +static void seq_quote_mem(struct seq_file *m, char *data, int len) +{ + seq_printf(m, "\""); + seq_escape_quotable_mem(m, data, len); + seq_printf(m, "\""); +} + static int client_info_show(struct seq_file *m, void *v) { struct inode *inode = m->private; @@ -2206,6 +2220,10 @@ static int client_info_show(struct seq_file *m, void *v) clp = container_of(nc, struct nfs4_client, cl_nfsdfs); memcpy(&clid, &clp->cl_clientid, sizeof(clid)); seq_printf(m, "clientid: %llx\n", clid); + seq_printf(m, "address: %pISpc\n", (struct sockaddr *)&clp->cl_addr); + seq_printf(m, "name: "); + seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len); + seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion); drop_client(clp); return 0; diff --git a/fs/seq_file.c b/fs/seq_file.c index 1dea7a8a5255..bb646e0c5b9c 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -383,6 +383,23 @@ void seq_escape(struct seq_file *m, const char *s, const char *esc) } EXPORT_SYMBOL(seq_escape); +/** + * seq_escape_mem - copy data to buffer, escaping some characters + * + * See string_escape_mem for explanations of the arguments. + */ +void seq_escape_mem(struct seq_file *m, const char *src, size_t isz, + unsigned int flags, const char *only) +{ + char *buf; + size_t size = seq_get_buf(m, &buf); + int ret; + + ret = string_escape_mem(src, isz, buf, size, flags, only); + seq_commit(m, ret < size ? ret : -1); +} +EXPORT_SYMBOL(seq_escape_mem); + void seq_vprintf(struct seq_file *m, const char *f, va_list args) { int len; diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index a121982af0f5..de6ace9e5e6b 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -127,6 +127,8 @@ void seq_put_hex_ll(struct seq_file *m, const char *delimiter, unsigned long long v, unsigned int width); void seq_escape(struct seq_file *m, const char *s, const char *esc); +void seq_escape_mem(struct seq_file *m, const char *src, size_t isz, + unsigned int flags, const char *only); void seq_hex_dump(struct seq_file *m, const char *prefix_str, int prefix_type, int rowsize, int groupsize, const void *buf, size_t len,