From nobody Wed Nov 27 07:36:48 2024 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.5]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DB260DDA8; Sat, 12 Oct 2024 01:53:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728698041; cv=none; b=tvt+Gr8nfl6Js/hk3qUscdhwv49tMigunvNW9IcQnmo7uYTMxZRhuyWH3oTCvRtYIsCmuT5Vx5GZbeFr6kCtXLjCLEoMFWLOJn9XTmVMlqvXr5LSSFe59Md3kKEVegEAtJNkm8Nr6Ch+kA9F19Ktx/TEo5NnkFOLcvQv44IiAy4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728698041; c=relaxed/simple; bh=pTo9MTWv0QsKaFyXt4UL/Xq5ps9nXBmmaRoAwXWw0o4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=KxZtv0nqRuTKMDSQ1AX1mLUA7M3ZS8wTgsUXsVaZTdgKm5EpqOPZwjyzdMj+EkIb0hiWuMJlFvfAmFWtbZNxJ6aY0womjXZgKXye6WUjklWOiHJ6h/qzNRs+MEkag5j3nZqEUyNY04/oCzakY9F/XhbqAmPrecXQ9ZBAOu4MpLo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=YNdubWUF; arc=none smtp.client-ip=220.197.31.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="YNdubWUF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=NOty4 fg+Ho7VaI0cQHA/jory4kn7TXlj/j4VXAzH1Ak=; b=YNdubWUFSuGPCHvX+eynp v8Z6hxu5AH4cq5p2AaM0Z8JxY+6lUWhYGfEAiyH6FmkEKvWC1oFgWDPr5WV8SHqe LS7GP1Ia0DavKw+9Y4wF3Gyj9Xlih3gNomU+GOgoEM/1VoTOEMtD/aiOlvuobWty z91ft/iZNfnMU7AZTPSoPc= Received: from localhost.localdomain (unknown [111.48.69.246]) by gzsmtp1 (Coremail) with SMTP id sCgvCgAHRFWf1glnqnpaAA--.15848S2; Sat, 12 Oct 2024 09:53:37 +0800 (CST) From: Chi Zhiling To: cem@kernel.org, djwong@kernel.org, hch@lst.de Cc: linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org, Chi Zhiling Subject: [PATCH v3] xfs_logprint: Fix super block buffer interpretation issue Date: Sat, 12 Oct 2024 09:52:35 +0800 Message-Id: <20241012015235.1706690-1-chizhiling@163.com> X-Mailer: git-send-email 2.27.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: sCgvCgAHRFWf1glnqnpaAA--.15848S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7Ar48Wr1kJr1fGw45XF4rAFb_yoW8Zw4xpF 1Sgay7XrZxZ34Yg3y7ZrWjvw4rKwn3Jr9rGrZFyr1rZr98Ar4Yvr9xua48uFW5GrWDtFs0 v345KryY9w4Dua7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jeYL9UUUUU= X-CM-SenderInfo: hfkl6xxlol0wi6rwjhhfrp/xtbBoRd2nWcJzyV4AwAAsi Content-Type: text/plain; charset="utf-8" From: Chi Zhiling When using xfs_logprint to interpret the buffer of the super block, the icount will always be 6360863066640355328 (0x5846534200001000). This is because the offset of icount is incorrect, causing xfs_logprint to misinterpret the MAGIC number as icount. This patch fixes the offset value of the SB counters in xfs_logprint. Before this patch: icount: 6360863066640355328 ifree: 5242880 fdblks: 0 frext: 0 After this patch: icount: 10240 ifree: 4906 fdblks: 37 frext: 0 Suggested-by: Darrick J. Wong Signed-off-by: Chi Zhiling Reviewed-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- logprint/log_misc.c | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) diff --git a/logprint/log_misc.c b/logprint/log_misc.c index 8e86ac34..e366f8f5 100644 --- a/logprint/log_misc.c +++ b/logprint/log_misc.c @@ -282,22 +282,15 @@ xlog_print_trans_buffer(char **ptr, int len, int *i, = int num_ops) if (be32_to_cpu(head->oh_len) < 4*8) { printf(_("Out of space\n")); } else { - __be64 a, b; + struct xfs_dsb *dsb =3D (struct xfs_dsb *) *ptr; =20 printf("\n"); - /* - * memmove because *ptr may not be 8-byte aligned - */ - memmove(&a, *ptr, sizeof(__be64)); - memmove(&b, *ptr+8, sizeof(__be64)); printf(_("icount: %llu ifree: %llu "), - (unsigned long long) be64_to_cpu(a), - (unsigned long long) be64_to_cpu(b)); - memmove(&a, *ptr+16, sizeof(__be64)); - memmove(&b, *ptr+24, sizeof(__be64)); + (unsigned long long) be64_to_cpu(dsb->sb_icount), + (unsigned long long) be64_to_cpu(dsb->sb_ifree)); printf(_("fdblks: %llu frext: %llu\n"), - (unsigned long long) be64_to_cpu(a), - (unsigned long long) be64_to_cpu(b)); + (unsigned long long) be64_to_cpu(dsb->sb_fdblocks), + (unsigned long long) be64_to_cpu(dsb->sb_frextents)); } super_block =3D 0; } else if (be32_to_cpu(*(__be32 *)(*ptr)) =3D=3D XFS_AGI_MAGIC) { --=20 2.43.0