From patchwork Tue May 4 10:26:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12237863 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 371D4C433ED for ; Tue, 4 May 2021 10:27:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE714613C0 for ; Tue, 4 May 2021 10:27:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230425AbhEDK17 (ORCPT ); Tue, 4 May 2021 06:27:59 -0400 Received: from mga01.intel.com ([192.55.52.88]:52973 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230405AbhEDK16 (ORCPT ); Tue, 4 May 2021 06:27:58 -0400 IronPort-SDR: bsURY5XRSkKoe2ngRgM7p9NDVAcFhkTt3t7fkVwyg9o/RuPNswO9JEA3BVCrQ9GhIYykRpnQC3 T+EatPEGVjYA== X-IronPort-AV: E=McAfee;i="6200,9189,9973"; a="218751816" X-IronPort-AV: E=Sophos;i="5.82,272,1613462400"; d="scan'208";a="218751816" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 May 2021 03:27:03 -0700 IronPort-SDR: RYhX4NRHke3w/KIPa7RQ84PlUZjhSDeSOg+2MBIUiFnLM2y8Z+JrHROFTpFXcgBPJ9VmXSl0sy sNhSkTOLFmOw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,272,1613462400"; d="scan'208";a="463102606" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga002.fm.intel.com with ESMTP; 04 May 2021 03:27:01 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id D1F449FA; Tue, 4 May 2021 13:27:17 +0300 (EEST) From: Andy Shevchenko To: "J. Bruce Fields" , Andy Shevchenko , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: "J. Bruce Fields" , Chuck Lever , Alexander Viro , Andy Shevchenko , Andrew Morton Subject: [PATCH v2 11/14] seq_file: Introduce seq_escape_mem() Date: Tue, 4 May 2021 13:26:45 +0300 Message-Id: <20210504102648.88057-12-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210504102648.88057-1-andriy.shevchenko@linux.intel.com> References: <20210504102648.88057-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Introduce seq_escape_mem() to allow users to pass additional parameters to string_escape_mem(). Suggested-by: Al Viro Signed-off-by: Andy Shevchenko --- fs/seq_file.c | 25 +++++++++++++++++++++++++ include/linux/seq_file.h | 2 ++ 2 files changed, 27 insertions(+) diff --git a/fs/seq_file.c b/fs/seq_file.c index 5059248f2d64..532cac2eae0f 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -355,6 +355,31 @@ int seq_release(struct inode *inode, struct file *file) } EXPORT_SYMBOL(seq_release); +/** + * seq_escape_mem - print data into buffer, escaping some characters + * @m: target buffer + * @src: source buffer + * @len: size of source buffer + * @flags: flags to pass to string_escape_mem() + * @esc: set of characters that need escaping + * + * Puts data into buffer, replacing each occurrence of character from + * given class (defined by @flags and @esc) with printable escaped sequence. + * + * Use seq_has_overflowed() to check for errors. + */ +void seq_escape_mem(struct seq_file *m, const char *src, size_t len, + unsigned int flags, const char *esc) +{ + char *buf; + size_t size = seq_get_buf(m, &buf); + int ret; + + ret = string_escape_mem(src, len, buf, size, flags, esc); + seq_commit(m, ret < size ? ret : -1); +} +EXPORT_SYMBOL(seq_escape_mem); + /** * seq_escape - print string into buffer, escaping some characters * @m: target buffer diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 723b1fa1177e..6de442182784 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -126,6 +126,8 @@ void seq_put_decimal_ll(struct seq_file *m, const char *delimiter, long long num void seq_put_hex_ll(struct seq_file *m, const char *delimiter, unsigned long long v, unsigned int width); +void seq_escape_mem(struct seq_file *m, const char *src, size_t len, + unsigned int flags, const char *esc); void seq_escape(struct seq_file *m, const char *s, const char *esc); void seq_escape_mem_ascii(struct seq_file *m, const char *src, size_t isz);