From patchwork Mon Jun 17 02:04:28 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: 10997785 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 7527D17F0 for ; Mon, 17 Jun 2019 02:07:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 64FDE286EC for ; Mon, 17 Jun 2019 02:07:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5869728815; Mon, 17 Jun 2019 02:07:48 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C52B12881A for ; Mon, 17 Jun 2019 02:07:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Message-Id:MIME-Version:References: In-Reply-To:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=O8d1nWMmUSIdEs2iTfAyxwZBVebTZm548RiXbj5Uc0c=; b=KVlSxw5IUIoARo 96gtYXHm2Y7F4RDCOcokidv9K+WbF9uitBhYhTyFeAKRQrtniJRqgdQvk0lyjuX1CvM/GNMoKUQHv ZgaayUBLsMooZx/Uoddqi7JmSYuB2q8cINoEiCVqcM8nBqOZOv78guF5dL4URw28gumdMxARe/vvT HIcJjE7485dHEU99fJhaIhnSK0lco2IWPkZNdxF0Tcz+mKZBUxogKEkExrJldbeUx/HTcnCJye3kG /RalyBQB9Q5wQqTLXaGODC+VC2yaeGvW38xsQ/joggF6ZvUrrtc3Y8/+cdAgg7VT15HUTG4BOe2x3 20S499rezTaZA8aB14ig==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hch3j-0006ip-65; Mon, 17 Jun 2019 02:07:47 +0000 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hch3U-0006WD-Bl for ath10k@lists.infradead.org; Mon, 17 Jun 2019 02:07:34 +0000 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5H27TRc014710 for ; Sun, 16 Jun 2019 22:07:31 -0400 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2t61jcgbqp-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sun, 16 Jun 2019 22:07:31 -0400 Received: from localhost by e06smtp05.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 d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x5H26Z9Q30015990 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 17 Jun 2019 02:06:35 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 94A11AE059; Mon, 17 Jun 2019 02:06:43 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A4FADAE056; Mon, 17 Jun 2019 02:06:42 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av26.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 8E65CA027F; Mon, 17 Jun 2019 12:06:41 +1000 (AEST) From: "Alastair D'Silva" To: alastair@d-silva.org Subject: [PATCH v3 5/7] lib/hexdump.c: Allow multiple groups to be separated by lines '|' Date: Mon, 17 Jun 2019 12:04:28 +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: 19061702-0020-0000-0000-0000034AA4A5 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19061702-0021-0000-0000-0000219DE733 Message-Id: <20190617020430.8708-6-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=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906170019 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190616_190732_715614_D30A5F8E X-CRM114-Status: GOOD ( 26.32 ) X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Stanislaw Gruszka , Petr Mladek , David Airlie , Joonas Lahtinen , dri-devel@lists.freedesktop.org, devel@driverdev.osuosl.org, linux-scsi@vger.kernel.org, Jassi Brar , ath10k@lists.infradead.org, intel-gfx@lists.freedesktop.org, Dan Carpenter , Jose Abreu , Tom Lendacky , "James E.J. Bottomley" , Jani Nikula , linux-fsdevel@vger.kernel.org, Steven Rostedt , Rodrigo Vivi , Benson Leung , Kalle Valo , Karsten Keil , "Martin K. Petersen" , Greg Kroah-Hartman , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky , David Laight , Daniel Vetter , netdev@vger.kernel.org, Enric Balletbo i Serra , Andrew Morton , "David S. Miller" , Alexander Viro Sender: "ath10k" Errors-To: ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Alastair D'Silva With the wider display format, it can become hard to identify how many bytes into the line you are looking at. The patch adds new flags to hex_dump_to_buffer() and print_hex_dump() to print vertical lines to separate every N groups of bytes. 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 | 59 ++++++++++++++++++++++++++++++++++++------ 2 files changed, 54 insertions(+), 8 deletions(-) diff --git a/include/linux/printk.h b/include/linux/printk.h index 97dd29a2bd77..c6b748f66a82 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -484,6 +484,9 @@ enum { #define HEXDUMP_ASCII BIT(0) #define HEXDUMP_SUPPRESS_REPEATED BIT(1) +#define HEXDUMP_2_GRP_LINES BIT(2) +#define HEXDUMP_4_GRP_LINES BIT(3) +#define HEXDUMP_8_GRP_LINES BIT(4) 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 08c6084d7daa..4da7d24826fb 100644 --- a/lib/hexdump.c +++ b/lib/hexdump.c @@ -77,6 +77,23 @@ char *bin2hex(char *dst, const void *src, size_t count) } EXPORT_SYMBOL(bin2hex); +static const char *group_separator(int group, u64 flags) +{ + if (group == 0) + return " "; + + if ((flags & HEXDUMP_8_GRP_LINES) && !((group) % 8)) + return "|"; + + if ((flags & HEXDUMP_4_GRP_LINES) && !((group) % 4)) + return "|"; + + if ((flags & HEXDUMP_2_GRP_LINES) && !((group) % 2)) + return "|"; + + return " "; +} + /** * hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory * @buf: data blob to dump @@ -87,6 +104,9 @@ EXPORT_SYMBOL(bin2hex); * @linebuflen: total size of @linebuf, including space for terminating NUL * @flags: A bitwise OR of the following flags: * HEXDUMP_ASCII: include ASCII after the hex output + * 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 * * hex_dump_to_buffer() works on one "line" of output at a time, converting * bytes of input to hexadecimal (and optionally printable ASCII) @@ -118,6 +138,7 @@ 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; if (!is_power_of_2(groupsize) || groupsize > 8) groupsize = 1; @@ -144,7 +165,8 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, for (j = 0; j < ngroups; j++) { ret = snprintf(linebuf + lx, linebuflen - lx, - "%s%16.16llx", j ? " " : "", + "%s%16.16llx", + j ? group_separator(j, flags) : "", get_unaligned(ptr8 + j)); if (ret >= linebuflen - lx) goto overflow1; @@ -155,7 +177,8 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, for (j = 0; j < ngroups; j++) { ret = snprintf(linebuf + lx, linebuflen - lx, - "%s%8.8x", j ? " " : "", + "%s%8.8x", + j ? group_separator(j, flags) : "", get_unaligned(ptr4 + j)); if (ret >= linebuflen - lx) goto overflow1; @@ -166,7 +189,8 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, for (j = 0; j < ngroups; j++) { ret = snprintf(linebuf + lx, linebuflen - lx, - "%s%4.4x", j ? " " : "", + "%s%4.4x", + j ? group_separator(j, flags) : "", get_unaligned(ptr2 + j)); if (ret >= linebuflen - lx) goto overflow1; @@ -196,11 +220,26 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, goto overflow2; 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 (linebuflen < lx + 2) + goto overflow2; + linebuf[lx++] = '|'; + } } nil: linebuf[lx] = '\0'; @@ -208,7 +247,8 @@ 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 : + return (flags & HEXDUMP_ASCII) ? ascii_column + len + + (len - 1) / line_chars : (groupsize * 2 + 1) * ngroups - 1; } EXPORT_SYMBOL(hex_dump_to_buffer); @@ -246,7 +286,7 @@ static void announce_skipped(const char *level, const char *prefix_str, if (count == 0) return; - printk("%s%s ** Skipped %lu bytes of value 0x%x **\n", + printk("%s%s ** Skipped %lu bytes of value 0x%02x **\n", level, prefix_str, count, val); } @@ -266,6 +306,9 @@ static void announce_skipped(const char *level, const char *prefix_str, * HEXDUMP_ASCII: include ASCII after the hex output * HEXDUMP_SUPPRESS_REPEATED: suppress repeated lines of identical * bytes + * 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 * * Given a buffer of u8 data, print_hex_dump() prints a hex + ASCII dump * to the kernel log at the specified kernel log level, with an optional @@ -295,14 +338,14 @@ void print_hex_dump_ext(const char *level, const char *prefix_str, u8 skipped_val = 0; size_t skipped = 0; - if (rowsize % groupsize) rowsize -= rowsize % groupsize; /* Worst case line length: - * 2 hex chars + space per byte in, 2 spaces, 1 char per byte in, NULL + * 2 hex chars + space per byte in, 2 spaces, 1 char per byte in, + * 1 char per N groups, NULL */ - linebuf_len = rowsize * 3 + 2 + rowsize + 1; + linebuf_len = rowsize * 3 + 2 + rowsize + rowsize / groupsize + 1; linebuf = kzalloc(linebuf_len, GFP_KERNEL); if (!linebuf) { printk("%s%shexdump: Could not alloc %u bytes for buffer\n",