From patchwork Mon Jun 17 02:04:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alastair D'Silva X-Patchwork-Id: 10997753 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 3F1851575 for ; Mon, 17 Jun 2019 02:07:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2DF3228807 for ; Mon, 17 Jun 2019 02:07:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2172528815; Mon, 17 Jun 2019 02:07:07 +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 8B1BE28807 for ; Mon, 17 Jun 2019 02:07:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727628AbfFQCHG (ORCPT ); Sun, 16 Jun 2019 22:07:06 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47626 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727617AbfFQCHB (ORCPT ); Sun, 16 Jun 2019 22:07:01 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5H26u8u033974 for ; Sun, 16 Jun 2019 22:07:00 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2t5vgffb0g-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sun, 16 Jun 2019 22:06:59 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 17 Jun 2019 03:06:44 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x5H26hXE39911824 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 17 Jun 2019 02:06:43 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A51F042045; Mon, 17 Jun 2019 02:06:43 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B53F44203F; Mon, 17 Jun 2019 02:06:42 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 17 Jun 2019 02:06:42 +0000 (GMT) Received: from adsilva.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 960BCA03B5; Mon, 17 Jun 2019 12:06:41 +1000 (AEST) From: "Alastair D'Silva" To: alastair@d-silva.org Cc: Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter , Dan Carpenter , Karsten Keil , Jassi Brar , Tom Lendacky , "David S. Miller" , Jose Abreu , Kalle Valo , Stanislaw Gruszka , Benson Leung , Enric Balletbo i Serra , "James E.J. Bottomley" , "Martin K. Petersen" , Greg Kroah-Hartman , Alexander Viro , Petr Mladek , Sergey Senozhatsky , Steven Rostedt , David Laight , Andrew Morton , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fbdev@vger.kernel.org, devel@driverdev.osuosl.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v3 6/7] lib/hexdump.c: Allow multiple groups to be separated by spaces Date: Mon, 17 Jun 2019 12:04:29 +1000 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190617020430.8708-1-alastair@au1.ibm.com> References: <20190617020430.8708-1-alastair@au1.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19061702-0012-0000-0000-00000329AB19 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19061702-0013-0000-0000-00002162C06E Message-Id: <20190617020430.8708-7-alastair@au1.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-06-17_01:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=928 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906170019 Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Alastair D'Silva Similar to the previous patch, this patch separates groups by 2 spaces for the hex fields, and 1 space for the ASCII field. eg. buf:00000000: 454d414e 43415053 4e495f45 00584544 NAMESPAC E_INDEX. buf:00000010: 00000000 00000002 00000000 00000000 ........ ........ Signed-off-by: Alastair D'Silva --- include/linux/printk.h | 3 ++ lib/hexdump.c | 65 +++++++++++++++++++++++++++++++----------- 2 files changed, 52 insertions(+), 16 deletions(-) diff --git a/include/linux/printk.h b/include/linux/printk.h index c6b748f66a82..04416e788802 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -487,6 +487,9 @@ enum { #define HEXDUMP_2_GRP_LINES BIT(2) #define HEXDUMP_4_GRP_LINES BIT(3) #define HEXDUMP_8_GRP_LINES BIT(4) +#define HEXDUMP_2_GRP_SPACES BIT(5) +#define HEXDUMP_4_GRP_SPACES BIT(6) +#define HEXDUMP_8_GRP_SPACES BIT(7) extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, char *linebuf, size_t linebuflen, diff --git a/lib/hexdump.c b/lib/hexdump.c index 4da7d24826fb..dc85ef0dbb0a 100644 --- a/lib/hexdump.c +++ b/lib/hexdump.c @@ -91,9 +91,37 @@ static const char *group_separator(int group, u64 flags) if ((flags & HEXDUMP_2_GRP_LINES) && !((group) % 2)) return "|"; + if ((flags & HEXDUMP_8_GRP_SPACES) && !((group) % 8)) + return " "; + + if ((flags & HEXDUMP_4_GRP_SPACES) && !((group) % 4)) + return " "; + + if ((flags & HEXDUMP_2_GRP_SPACES) && !((group) % 2)) + return " "; + return " "; } +static void separator_parameters(u64 flags, int groupsize, int *sep_chars, + char *sep) +{ + if (flags & (HEXDUMP_2_GRP_LINES | HEXDUMP_2_GRP_SPACES)) + *sep_chars = groupsize * 2; + if (flags & (HEXDUMP_4_GRP_LINES | HEXDUMP_4_GRP_SPACES)) + *sep_chars = groupsize * 4; + if (flags & (HEXDUMP_8_GRP_LINES | HEXDUMP_8_GRP_SPACES)) + *sep_chars = groupsize * 8; + + if (flags & (HEXDUMP_2_GRP_LINES | HEXDUMP_4_GRP_LINES | + HEXDUMP_8_GRP_LINES)) + *sep = '|'; + + if (flags & (HEXDUMP_2_GRP_SPACES | HEXDUMP_4_GRP_SPACES | + HEXDUMP_8_GRP_SPACES)) + *sep = ' '; +} + /** * hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory * @buf: data blob to dump @@ -107,6 +135,9 @@ static const char *group_separator(int group, u64 flags) * HEXDUMP_2_GRP_LINES: insert a '|' after every 2 groups * HEXDUMP_4_GRP_LINES: insert a '|' after every 4 groups * HEXDUMP_8_GRP_LINES: insert a '|' after every 8 groups + * HEXDUMP_2_GRP_SPACES: insert a ' ' after every 2 groups + * HEXDUMP_4_GRP_SPACES: insert a ' ' after every 4 groups + * HEXDUMP_8_GRP_SPACES: insert a ' ' after every 8 groups * * hex_dump_to_buffer() works on one "line" of output at a time, converting * bytes of input to hexadecimal (and optionally printable ASCII) @@ -138,7 +169,8 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, int j, lx = 0; int ascii_column; int ret; - int line_chars = 0; + int sep_chars = 0; + char sep = 0; if (!is_power_of_2(groupsize) || groupsize > 8) groupsize = 1; @@ -152,8 +184,14 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, len = rowsize; ngroups = len / groupsize; + ascii_column = rowsize * 2 + rowsize / groupsize + 1; + // space separators use 2 spaces in the hex output + separator_parameters(flags, groupsize, &sep_chars, &sep); + if (sep == ' ') + ascii_column += rowsize / sep_chars; + if (!linebuflen) goto overflow1; @@ -221,24 +259,17 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, linebuf[lx++] = ' '; } - if (flags & HEXDUMP_2_GRP_LINES) - line_chars = groupsize * 2; - if (flags & HEXDUMP_4_GRP_LINES) - line_chars = groupsize * 4; - if (flags & HEXDUMP_8_GRP_LINES) - line_chars = groupsize * 8; - for (j = 0; j < len; j++) { if (linebuflen < lx + 2) goto overflow2; ch = ptr[j]; linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.'; - if (line_chars && ((j + 1) < len) && - ((j + 1) % line_chars == 0)) { + if (sep_chars && ((j + 1) < len) && + ((j + 1) % sep_chars == 0)) { if (linebuflen < lx + 2) goto overflow2; - linebuf[lx++] = '|'; + linebuf[lx++] = sep; } } nil: @@ -247,9 +278,11 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, overflow2: linebuf[lx++] = '\0'; overflow1: - return (flags & HEXDUMP_ASCII) ? ascii_column + len + - (len - 1) / line_chars : - (groupsize * 2 + 1) * ngroups - 1; + if (flags & HEXDUMP_ASCII) + return ascii_column + len + (len - 1) / sep_chars; + + return groupsize * 2 * ngroups + + ((sep == ' ') ? 2 : 1) * (ngroups - 1); } EXPORT_SYMBOL(hex_dump_to_buffer); @@ -343,9 +376,9 @@ void print_hex_dump_ext(const char *level, const char *prefix_str, /* Worst case line length: * 2 hex chars + space per byte in, 2 spaces, 1 char per byte in, - * 1 char per N groups, NULL + * 2 char per N groups, NULL */ - linebuf_len = rowsize * 3 + 2 + rowsize + rowsize / groupsize + 1; + linebuf_len = rowsize * 3 + 2 + rowsize + 2 * rowsize / groupsize + 1; linebuf = kzalloc(linebuf_len, GFP_KERNEL); if (!linebuf) { printk("%s%shexdump: Could not alloc %u bytes for buffer\n",