From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f47.google.com (mail-pj1-f47.google.com [209.85.216.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 66F1D8F49 for ; Sun, 5 Apr 2026 01:19:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.47 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775351975; cv=none; b=CuqhhjssyIvloyCNJJ78zMT8tSrKFouTZgxubRLJ67DwFlxlV6iTBLGfQye0FhhRDPf0u3z8uvfpyN0JdJ/eKGHDM/8jcuj72QS4SU7Ei+/SsR90v1IJ/kgtilVGaK6L6PSScg0Ix13bUIw7PNd/XCl60biWjPWzZ/oq9og5DA0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775351975; c=relaxed/simple; bh=SbQ26Ugby5sn8np4vksLWfE3+QEctsHIxolywpUYWo4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=TCPf0CmwXJyPoJjcnNjubJcWC0byDHbhopjbUJLEc6Ed/voFUCeW3QgpnO/WLnOzLyvw3VrZRQX71tAC4NgWMx4FhpJb8Fx9yj2uCJrJK4y7iNp23PZ8hyfkqAJINT+SOyldFQPx6wJXvKuZJFO1vU4vgbvANA5jGMYLRGsHWq0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=XATiYbzG; arc=none smtp.client-ip=209.85.216.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="XATiYbzG" Received: by mail-pj1-f47.google.com with SMTP id 98e67ed59e1d1-35d9f68d011so1889154a91.2 for ; Sat, 04 Apr 2026 18:19:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1775351974; x=1775956774; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=5qUl+zB/t26hL3i0pic6Ba/GlGydaGqmI52TgRmCoQw=; b=XATiYbzGCVgP+sEHlV4w2HfLMk/bGJW78WIGahf7j1KBIaqBsUMrY6cSxd4/w6z3I+ aK7BIQ5gz21Dp03HoEaKZLZoZ4PwWeVpoTRulbzBz0FOCdbY4+v3C1jkjuivOCidRbpU K2iQLGiRnnJY7bMxEUyp3Kzt6/9ySaHZj5JZYruC28W5XMLKHF3YZVYcuEHYhnw8EahH GmK6CZjbFy1O6oRq0TKh0b4IUM9pBebExmsS7n9wAyrsZjI936boQXlnjumTeWYSsWEu nO9/tQT6zpxbeoPcNWDhSA32mkvVs/m3Hh8q51It5U7m/4/Shyp280plm3JSHf3ExwOg PVNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775351974; x=1775956774; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=5qUl+zB/t26hL3i0pic6Ba/GlGydaGqmI52TgRmCoQw=; b=e6S0MUN5Um/N/ySS1BF3EqlXy2IO0Tv/Eaq8vTbIToyid16m5WnJkxreONj6T09kt4 tdMzgKtlI9GcxlAPjkqMojDLShmfbQKNOTFKtFfCDzxVSKH9lt8ZS/HqVmZzHSYsnviw 4TLS0/5AnHmlXXk6ZAw2Srb7C4wZqGhJEInz8JDbs5PWDqoJbZdycI1bCYX0f4HhgV4Q kjzpvd7BQ20jnvoGCU57vvLCvPuRSobJnxs2M6kXmjvhVlZmFwxLAWlWGijaM5lJZd7w saViuc6RiqOOLsTc8t7z9YUuPvRHbiLBANm6/Iyl3znqKNVRYMjk7X2tPhgOf5JO6O3J nFdQ== X-Gm-Message-State: AOJu0YzoAkF2EcIqjS670fs/zVNTBp7T/z39AanP+oE811Wl/OshnRKY zWjc8TvM56dQlac4ID47sU8tgGpjcObAtbrKWB4e4hTjD/U9UbBAGcI7 X-Gm-Gg: AeBDiesqojT+gwSLhDcSBTSwYN52ng3lzo8vRNxl3psC5I5KDEJ4EPcazyoOf7Wognv mzDWApRl8UbPIgiA8t16Ozt0xVnUbWV8ZKcOTLkkHr5pXB1v6f8r7g6Spazqnpbq+SkIyA6JBq/ Y1zgpOPuVQeB407GBTGOLfDber36xOcOjR3Z5K7kFVKNrXgkUnTZh2f23B4figKU2Gzq/KHdEZo 2T3hBzkLlioGju8N+/MKgyBReWFR4MRB68vWT8nQraTTAQVf7sydeTDpfH8hrVwzIWNy2ILF5Iq Bvwcbx3Nz1FBCf6KCHsvUzS9Qh5HTYZIZhMZLD5Es5vj+gOmpjcU6P73FPWsu0SGCxdkNMniZHl ToLTHdE1RgIjrnP6eyfiXH1q0RnKD8N8Y0vO3NzHVfHWKdzrUREy6G5S2rYUmYX5Elmim0v2pmb zWMkdpHiOjTxnjfwIVag2pvn5L/LjgOjctE8L0yOWGc1ORlAvKaNYEb8BHv39Pjd4dHS/Zz/R9y 7ZbNQvk37TA6TL4HKHnAW2afw6PXT68j1BOYmer9no3Qe+q9t1h1hUkPa1DVie99zkaLse8Ak/O 8ySgtklU6dF2EjOHesQIxUoSHNmyLxppYCu1knO8aA== X-Received: by 2002:a17:90b:4fc1:b0:35d:93ff:2852 with SMTP id 98e67ed59e1d1-35de67ea273mr7062505a91.10.1775351973593; Sat, 04 Apr 2026 18:19:33 -0700 (PDT) Received: from debian13.localdomain (bb219-75-96-14.singnet.com.sg. [219.75.96.14]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-35dd36a0595sm9976493a91.16.2026.04.04.18.19.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Apr 2026 18:19:33 -0700 (PDT) From: Adi Nata To: hirofumi@mail.parknet.co.jp Cc: linux-kernel@vger.kernel.org, Adi Nata Subject: [PATCH] kunit: fat: test cluster and directory i_pos layout helpers Date: Sun, 5 Apr 2026 09:19:20 +0800 Message-ID: <20260405011920.28622-1-adinata.softwareengineer@gmail.com> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add KUnit coverage for fat_clus_to_blknr() and fat_get_blknr_offset() using stub msdos_sb_info values so cluster-to-sector and i_pos split math stays correct. Signed-off-by: Adi Nata --- fs/fat/fat_test.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/fs/fat/fat_test.c b/fs/fat/fat_test.c index 1f0062659067..add44178f28e 100644 --- a/fs/fat/fat_test.c +++ b/fs/fat/fat_test.c @@ -20,6 +20,37 @@ static void fat_checksum_test(struct kunit *test) KUNIT_EXPECT_EQ(test, fat_checksum("ABCDEFGHA "), (u8)98); } +static void fat_clus_to_blknr_test(struct kunit *test) +{ + struct msdos_sb_info sbi = { + .sec_per_clus = 4, + .data_start = 100, + }; + + KUNIT_EXPECT_EQ(test, (sector_t)100, + fat_clus_to_blknr(&sbi, FAT_START_ENT)); + KUNIT_EXPECT_EQ(test, (sector_t)112, fat_clus_to_blknr(&sbi, 5)); +} + +static void fat_get_blknr_offset_test(struct kunit *test) +{ + struct msdos_sb_info sbi = { + .dir_per_block = 16, + .dir_per_block_bits = 4, + }; + + sector_t blknr; + int offset; + + fat_get_blknr_offset(&sbi, 0, &blknr, &offset); + KUNIT_EXPECT_EQ(test, (sector_t)0, blknr); + KUNIT_EXPECT_EQ(test, 0, offset); + + fat_get_blknr_offset(&sbi, (10 << 4) | 7, &blknr, &offset); + KUNIT_EXPECT_EQ(test, (sector_t)10, blknr); + KUNIT_EXPECT_EQ(test, 7, offset); +} + struct fat_timestamp_testcase { const char *name; struct timespec64 ts; @@ -181,6 +212,8 @@ static void fat_time_unix2fat_test(struct kunit *test) static struct kunit_case fat_test_cases[] = { KUNIT_CASE(fat_checksum_test), + KUNIT_CASE(fat_clus_to_blknr_test), + KUNIT_CASE(fat_get_blknr_offset_test), KUNIT_CASE_PARAM(fat_time_fat2unix_test, fat_time_gen_params), KUNIT_CASE_PARAM(fat_time_unix2fat_test, fat_time_gen_params), {}, -- 2.47.3