From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f100.google.com (mail-ot1-f100.google.com [209.85.210.100]) (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 0E96342A132 for ; Thu, 8 Jan 2026 09:20:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.100 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767864011; cv=none; b=kX32ggex7KJanNw1iKIIU9rTQ49Lgu5cPxZhr7Mr1FMC7d2ktzvB6mKzQV8TpLI+5kdW4wlfAP6dfk6RKYPHdamebydkHDyYfMYxSznU1V1DfY0ecov8JHek5mzItlIdygSWsqG+Tqa0g637OJyqCFj716fTuJvQDHiyMt4OC4U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767864011; c=relaxed/simple; bh=9OzlcL0OMkkabAm5Bt97yjXJPRZ7G2AIrVYrMNNwlrY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Blz3mzKrplYNC8xD3zMto1YCwKCxpQYkUTvmCWBFctnkDrLeYDcSI9PpyQkYaOhDCnTOykq1xm9nNhwasL6WDe4wqxsCLdrDpvbp0j7RvPzadhenRAhCE30/urJQ+QI6mfQdZTii/xrPbg4RnpQhnFraKvASRR4i0UAS6knLohk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=purestorage.com; spf=fail smtp.mailfrom=purestorage.com; dkim=pass (2048-bit key) header.d=purestorage.com header.i=@purestorage.com header.b=SrZ1Hv1q; arc=none smtp.client-ip=209.85.210.100 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=purestorage.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=purestorage.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=purestorage.com header.i=@purestorage.com header.b="SrZ1Hv1q" Received: by mail-ot1-f100.google.com with SMTP id 46e09a7af769-7c7589281e9so552396a34.1 for ; Thu, 08 Jan 2026 01:20:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=purestorage.com; s=google2022; t=1767863998; x=1768468798; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=VUiKvIP8HCqd3i2lEOpd43ZYOvZAdiFALGFMxkbZ3Lg=; b=SrZ1Hv1qHYthTgwMEqzYS4jICA7jn9BHX9xFIFQ8APtlvxobZbpvzDkdlhH6K8548A A90m+jwNC1vuqW8z/e0yxJhrmkfifeHZzcHKTxIOKBJeAQ2FtZepRJELUl5Q1G7kh3Rd eRePO0cb/zgNRQH4l06WiJ4nt9Vtsv84YfAGZPRcaFt7N+D+y/GOtphLCXsZWUwCra24 B1sxlysGhVNeP81LlDxLH6Idt7hyIOLghscpCuuHakiap9gkED5ayQibw0eppeEX8sOI m0BrqV4uhbRpgXhVVFM4cqs16OQU55mDWuk8UI8bc1U84bZAU5UGdcPujf3lK3MsmHf7 Ts6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767863998; x=1768468798; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=VUiKvIP8HCqd3i2lEOpd43ZYOvZAdiFALGFMxkbZ3Lg=; b=Ssg2t512lsxPwPqgxuxDnRWtjSlupmFl8mU0nbtX+eSVBzDMEiaOzESQE38wgqhiX3 th2SmCHD7SHMaPBRQumsxzUunc5jmspk8iab0pZ76hHZIea58mYV5xSSiwF95TXpGBbD AuujT5J6iVNf9/OFYNQkJ4eMWRbd/YThWKK1mkwyT/T/8vdYHEWrBE0UGVGS6JX7qEeN IK9ftbbkrU9IODTAAZRmgUgwrx3DD7wc6tOhHp/swmDE01GGchaohecpk7MokTlId/Hl 0UQbO0Yb+hZX3hoAu87g4uyZOlqpE+qGkDSk8rU62t/kJ4o+N3oBqH+EfOS6KlkYCFgm q6xw== X-Gm-Message-State: AOJu0YzK5eP3r5askXt/012/Y+s/S5a1wSv/UR/YXn4agbp5bgCI811O r7VS2pUj2sz8/PbLTmVOq1N/jEfhTcJXzlzCZ07XirtHaDpoqD3FmXObFPMRWVRhinPqVI+fUFl qXiIOIkKt2V72mfeTK8+d0GZZfEfai94sFqlm8Unc43/4xdukdg64 X-Gm-Gg: AY/fxX6c3tiONllAoO4fAPSzi7n28cAM94UO7bRFEjM2pGhzeWbsG2qCNyGOp1q7k06 sEklwJdiAaVgfnUd8IBxs98V4SO6wV9eWS33yECGFkoMA8XWWUhyZriFc7ezChW76k+5w17rSDv W3yn2OukM28dxKqGr+/5QsbXksqG4sqxGznmyQyIU+jXWwZFqrrB5HP5MmbWiFnyt4ILZLs9jSK PS5IzzXHpzsFMF+krj3JcoElGPb7E1zEVXfQIAY5IZqrZuCenLyK+ngk62uGlAYQl+LFmVBVHlG OYDv2G4dDL1icBRe1iNgd/ep14R0y6Du4kBOahn9CUXKVp2IdZJk7Y3kVx+61sck72wWDe8rUOF J+4IX1tTT6anRSvQX1E04yWusR8M= X-Google-Smtp-Source: AGHT+IEMYn8qGLSHkK75uAAuzyF1tc5/kRXEa/H/RxheREPQOHr9VMCDWdd15D1Qh/+p630u8i3hRg7auOGU X-Received: by 2002:a05:6870:b3d6:b0:3e8:2323:867f with SMTP id 586e51a60fabf-3ffc094ee9emr1931424fac.2.1767863997870; Thu, 08 Jan 2026 01:19:57 -0800 (PST) Received: from c7-smtp-2023.dev.purestorage.com ([2620:125:9017:12:36:3:5:0]) by smtp-relay.gmail.com with ESMTPS id 586e51a60fabf-3ffa4e3e739sm837429fac.7.2026.01.08.01.19.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jan 2026 01:19:57 -0800 (PST) X-Relaying-Domain: purestorage.com Received: from dev-csander.dev.purestorage.com (dev-csander.dev.purestorage.com [10.112.6.120]) by c7-smtp-2023.dev.purestorage.com (Postfix) with ESMTP id E12183421AE; Thu, 8 Jan 2026 02:19:56 -0700 (MST) Received: by dev-csander.dev.purestorage.com (Postfix, from userid 1557716354) id DC198E42F2C; Thu, 8 Jan 2026 02:19:56 -0700 (MST) From: Caleb Sander Mateos To: Ming Lei , Jens Axboe , Shuah Khan Cc: linux-block@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Stanley Zhang , Uday Shankar , "Martin K . Petersen" , Caleb Sander Mateos Subject: [PATCH v4 13/19] selftests: ublk: add utility to get block device metadata size Date: Thu, 8 Jan 2026 02:19:41 -0700 Message-ID: <20260108091948.1099139-14-csander@purestorage.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20260108091948.1099139-1-csander@purestorage.com> References: <20260108091948.1099139-1-csander@purestorage.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Some block device integrity parameters are available in sysfs, but others are only accessible using the FS_IOC_GETLBMD_CAP ioctl. Add a metadata_size utility program to print out the logical block metadata size, PI offset, and PI size within the metadata. Example output: $ metadata_size /dev/ublkb0 metadata_size: 64 pi_offset: 56 pi_tuple_size: 8 Signed-off-by: Caleb Sander Mateos --- tools/testing/selftests/ublk/Makefile | 5 +-- tools/testing/selftests/ublk/metadata_size.c | 36 ++++++++++++++++++++ 2 files changed, 39 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/ublk/metadata_size.c diff --git a/tools/testing/selftests/ublk/Makefile b/tools/testing/selftests/ublk/Makefile index 06ba6fde098d..351ac6438561 100644 --- a/tools/testing/selftests/ublk/Makefile +++ b/tools/testing/selftests/ublk/Makefile @@ -47,14 +47,15 @@ TEST_PROGS += test_stress_03.sh TEST_PROGS += test_stress_04.sh TEST_PROGS += test_stress_05.sh TEST_PROGS += test_stress_06.sh TEST_PROGS += test_stress_07.sh -TEST_GEN_PROGS_EXTENDED = kublk +TEST_GEN_PROGS_EXTENDED = kublk metadata_size +STANDALONE_UTILS := metadata_size.c LOCAL_HDRS += $(wildcard *.h) include ../lib.mk -$(TEST_GEN_PROGS_EXTENDED): $(wildcard *.c) +$(OUTPUT)/kublk: $(filter-out $(STANDALONE_UTILS),$(wildcard *.c)) check: shellcheck -x -f gcc *.sh diff --git a/tools/testing/selftests/ublk/metadata_size.c b/tools/testing/selftests/ublk/metadata_size.c new file mode 100644 index 000000000000..76ecddf04d25 --- /dev/null +++ b/tools/testing/selftests/ublk/metadata_size.c @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include + +int main(int argc, char **argv) +{ + struct logical_block_metadata_cap cap = {}; + const char *filename; + int fd; + int result; + + if (argc != 2) { + fprintf(stderr, "Usage: %s BLOCK_DEVICE\n", argv[0]); + return 1; + } + + filename = argv[1]; + fd = open(filename, O_RDONLY); + if (fd < 0) { + perror(filename); + return 1; + } + + result = ioctl(fd, FS_IOC_GETLBMD_CAP, &cap); + if (result < 0) { + perror("ioctl"); + return 1; + } + + printf("metadata_size: %u\n", cap.lbmd_size); + printf("pi_offset: %u\n", cap.lbmd_pi_offset); + printf("pi_tuple_size: %u\n", cap.lbmd_pi_size); + return 0; +} -- 2.45.2