From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06E1CC25B06 for ; Sun, 14 Aug 2022 21:22:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240752AbiHNVWo (ORCPT ); Sun, 14 Aug 2022 17:22:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56504 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232036AbiHNVVz (ORCPT ); Sun, 14 Aug 2022 17:21:55 -0400 Received: from out0.migadu.com (out0.migadu.com [IPv6:2001:41d0:2:267::]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8EA3B110E for ; Sun, 14 Aug 2022 14:20:58 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1660512057; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wLxh0Hn7Rty1hn1dIvhOXvcoFTGhIj5G2bOpTwCazBo=; b=mlVdt/q3PmocG843a3vsgC8xnGWJwafKJjs1vY7thd1+1EWw87m8wB3I/q3RLYuan37lZF 7nQXk/ie09zRAXVxnG1WUfe7P9lewDMphooBfych1Ii7UtrPK9F111E1Hf9/if3S+dk+mu +m+95r6dMJCwnS60sPUQu4nIKKATqOk= From: Kent Overstreet To: akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, Kent Overstreet , Petr Mladek , Rasmus Villemoes Subject: [PATCH 20/32] vsprintf: Refactor hex_string, bitmap_string_list, bitmap_string Date: Sun, 14 Aug 2022 17:19:59 -0400 Message-Id: <20220814212011.1727798-21-kent.overstreet@linux.dev> In-Reply-To: <20220814212011.1727798-1-kent.overstreet@linux.dev> References: <20220814212011.1727798-1-kent.overstreet@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kent Overstreet This patch cleans up printf_spec handling: these functions only use spec.field_width and they do not interpret it in the normal way - instead it's a number of bits/bytes passed in to print, so these functions are changed to take that parameter directly. Signed-off-by: Kent Overstreet Cc: Petr Mladek Cc: Rasmus Villemoes --- lib/vsprintf.c | 59 +++++++++++++++++++++++--------------------------- 1 file changed, 27 insertions(+), 32 deletions(-) diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 81d2f3fa1a..e01d660a6f 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1126,18 +1126,23 @@ void resource_string(struct printbuf *out, struct resource *res, } static noinline_for_stack -void hex_string(struct printbuf *out, u8 *addr, - struct printf_spec spec, const char *fmt) +void hex_string(struct printbuf *out, const u8 *addr, + int len, const char *fmt) { - int i, len = 1; /* if we pass '%ph[CDN]', field width remains - negative value, fallback to the default */ char separator; - if (spec.field_width == 0) - /* nothing to print */ + /* nothing to print */ + if (len == 0) return; - if (check_pointer_spec(out, addr, spec)) + /* if we pass '%ph[CDN]', field width remains + negative value, fallback to the default */ + if (len < 0) + len = 1; + + len = min(len, 64); + + if (check_pointer(out, addr)) return; switch (fmt[1]) { @@ -1155,34 +1160,21 @@ void hex_string(struct printbuf *out, u8 *addr, break; } - if (spec.field_width > 0) - len = min_t(int, spec.field_width, 64); - - for (i = 0; i < len; ++i) { - __prt_char(out, hex_asc_hi(addr[i])); - __prt_char(out, hex_asc_lo(addr[i])); - - if (separator && i != len - 1) - __prt_char(out, separator); - } - - printbuf_nul_terminate(out); + prt_hex_bytes(out, addr, len, 1, separator); } static noinline_for_stack -void bitmap_string(struct printbuf *out, unsigned long *bitmap, - struct printf_spec spec, const char *fmt) +void bitmap_string(struct printbuf *out, unsigned long *bitmap, int nr_bits) { + struct printf_spec spec = { .flags = SMALL | ZEROPAD, .base = 16 }; const int CHUNKSZ = 32; - int nr_bits = max_t(int, spec.field_width, 0); int i, chunksz; bool first = true; - if (check_pointer_spec(out, bitmap, spec)) - return; + nr_bits = max(nr_bits, 0); - /* reused to print numbers */ - spec = (struct printf_spec){ .flags = SMALL | ZEROPAD, .base = 16 }; + if (check_pointer(out, bitmap)) + return; chunksz = nr_bits & (CHUNKSZ - 1); if (chunksz == 0) @@ -1211,13 +1203,14 @@ void bitmap_string(struct printbuf *out, unsigned long *bitmap, static noinline_for_stack void bitmap_list_string(struct printbuf *out, unsigned long *bitmap, - struct printf_spec spec, const char *fmt) + int nr_bits) { - int nr_bits = max_t(int, spec.field_width, 0); bool first = true; int rbot, rtop; - if (check_pointer_spec(out, bitmap, spec)) + nr_bits = max(nr_bits, 0); + + if (check_pointer(out, bitmap)) return ; for_each_set_bitrange(rbot, rtop, bitmap, nr_bits) { @@ -2232,13 +2225,15 @@ void pointer(struct printbuf *out, const char *fmt, resource_string(out, ptr, fmt[0] == 'R'); return do_width_precision(out, prev_pos, spec); case 'h': - return hex_string(out, ptr, spec, fmt); + /* Uses field_width but _not_ as field size */ + return hex_string(out, ptr, spec.field_width, fmt); case 'b': + /* Uses field_width but _not_ as field size */ switch (fmt[1]) { case 'l': - return bitmap_list_string(out, ptr, spec, fmt); + return bitmap_list_string(out, ptr, spec.field_width); default: - return bitmap_string(out, ptr, spec, fmt); + return bitmap_string(out, ptr, spec.field_width); } case 'M': /* Colon separated: 00:01:02:03:04:05 */ case 'm': /* Contiguous: 000102030405 */ -- 2.36.1