From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.gmx.net (mout.gmx.net [212.227.15.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3EAC3374DD for ; Thu, 11 Jul 2024 03:48:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.15.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720669689; cv=none; b=Csosvqc03qjEdS0zupRe9DdxMPzHIL4HIXOIfC6+o3jFja7rfYQmeLKdZoFhJA76qtVMRODXNXwXLZiflPqaGV53vrrMRd9XMzduxeN/vXyLPKLPIDAn+/3/oQW1NPxOy6YKKglCkCnmWYpPYDhT0x0bbS/5Hg/bWKGYXtiAN98= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720669689; c=relaxed/simple; bh=JFt5Ihmox4GYnbdJ5ygYlf8YtqpHyaWk9nIRhsjNuyk=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=u7UHoSwxihnqTqX3092sqIoxzFD98Ab1EGDKtF2H3acN+crsq+7Y8YRrjkgJ+jEMgGC0zDRbZrHuMdnvkyXGEjHgCTFG2KUlsPDb9O3rZiPFYEFVAZ2S3nSWK+Pilg53b+mrkkjnl9um9tCj4AZ7F8CiU0+oiomvGdFv/fut70o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.com; spf=pass smtp.mailfrom=gmx.com; dkim=pass (2048-bit key) header.d=gmx.com header.i=quwenruo.btrfs@gmx.com header.b=o26zsVBi; arc=none smtp.client-ip=212.227.15.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmx.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmx.com header.i=quwenruo.btrfs@gmx.com header.b="o26zsVBi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.com; s=s31663417; t=1720669683; x=1721274483; i=quwenruo.btrfs@gmx.com; bh=TIYa0twU9/Zk+YDf986BzDldanp8mGY18LTrn1Tm71E=; h=X-UI-Sender-Class:Message-ID:Date:MIME-Version:Subject:To: References:From:In-Reply-To:Content-Type: Content-Transfer-Encoding:cc:content-transfer-encoding: content-type:date:from:message-id:mime-version:reply-to:subject: to; b=o26zsVBiKUV+PCnRqSyolt30bXjcgGXKvFX9AvYI9Zxud2hoYSHV6fLd+5r+SjHb uVdMbsSqpqGu4lfA8lghYt16g/nZmDLY/nDDf5D5JAlIZTHvlblhRxJo1sZEn+Chr WrkV5JCXfsAR/wLLS/kx0gdC2dQnhdau0e/tNazLgznWWEMnxTCHSwaoyb2pMZ9pw qDbgipmdVht0xs2U2ZmuaMzD28R2smbs5TUtb0EhQoYWg9sHNQpbyNqYFAtilTu42 S5snPQjM2YvftSLir7O8SdpIDabbIlA3Q4MFstoJwt5K3eghoh6wvcZbd39+wFGSR j1DpL/FCwq1pgeP2Pw== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from [172.16.0.191] ([159.196.52.54]) by mail.gmx.net (mrgmx005 [212.227.17.184]) with ESMTPSA (Nemesis) id 1Mkpav-1rxPJ71u3T-00mewa; Thu, 11 Jul 2024 05:48:02 +0200 Message-ID: Date: Thu, 11 Jul 2024 13:17:59 +0930 Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: btrfs-progs: btrfs dev usa as non-root is wrong and should just abort To: Russell Coker , linux-btrfs@vger.kernel.org References: <2159193.PIDvDuAF1L@cupcakke> <96677547-0177-4226-92bd-174c167269b3@gmx.com> <4914581.rnE6jSC6OK@cupcakke> Content-Language: en-US From: Qu Wenruo Autocrypt: addr=quwenruo.btrfs@gmx.com; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNIlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT7CwJQEEwEIAD4CGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCY00iVQUJDToH pgAKCRDCPZHzoSX+qNKACACkjDLzCvcFuDlgqCiS4ajHAo6twGra3uGgY2klo3S4JespWifr BLPPak74oOShqNZ8yWzB1Bkz1u93Ifx3c3H0r2vLWrImoP5eQdymVqMWmDAq+sV1Koyt8gXQ XPD2jQCrfR9nUuV1F3Z4Lgo+6I5LjuXBVEayFdz/VYK63+YLEAlSowCF72Lkz06TmaI0XMyj jgRNGM2MRgfxbprCcsgUypaDfmhY2nrhIzPUICURfp9t/65+/PLlV4nYs+DtSwPyNjkPX72+ LdyIdY+BqS8cZbPG5spCyJIlZonADojLDYQq4QnufARU51zyVjzTXMg5gAttDZwTH+8LbNI4 mm2YzsBNBFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcga CbPEwhLj1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj /IrRUUka68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fN GSsRb+pKEKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0 q1eW4Jrv0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEv ABEBAAHCwHwEGAEIACYCGwwWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCY00ibgUJDToHvwAK CRDCPZHzoSX+qK6vB/9yyZlsS+ijtsvwYDjGA2WhVhN07Xa5SBBvGCAycyGGzSMkOJcOtUUf tD+ADyrLbLuVSfRN1ke738UojphwkSFj4t9scG5A+U8GgOZtrlYOsY2+cG3R5vjoXUgXMP37 INfWh0KbJodf0G48xouesn08cbfUdlphSMXujCA8y5TcNyRuNv2q5Nizl8sKhUZzh4BascoK DChBuznBsucCTAGrwPgG4/ul6HnWE8DipMKvkV9ob1xJS2W4WJRPp6QdVrBWJ9cCdtpR6GbL iQi22uZXoSPv/0oUrGU+U5X4IvdnvT+8viPzszL5wXswJZfqfy8tmHM85yjObVdIG6AlnrrD In-Reply-To: <4914581.rnE6jSC6OK@cupcakke> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:DKfnvLKhh5PSYFnmDp4gmRwiyE8p+LmMVQr3w03yY2w8smAraM0 Xb4I2aVei4UXB8KswiGIqArssrT312B077Eycg4H1ThY5+GaM++AKcU2Vvhowvl8xHkvMuZ 8oqKSNUWai0yeK1/p2zdfBBrmpg7p/wT5yWn2A1uyQkmQdQCR3tTqjmKoOs4nSyjmbkIVh2 m+BACaENbYwMuiJqnabnw== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:nZ9e+B4zsgU=;/vpvpw/e+9ys2J/3ZQpoCfpEnvu aXDU57WIZIKKVjlsEtjDhW63479jQwTYM0qYUxgzcni2pBJ0U1NbNFH+wvtwbtsf5rhfb6+x2 SoECrT5W5xnqKSfjhMB/AISI3/dm3F45UsZIrPGYanrooQB4HrnvCFqK4mgMdvnDcY30wtV5b vKxVPDHGf7xxsIvma6M35Qdb/lJ9zvWDiBNSspAh5VLrYGrJyMYQm82sZlVQPpcQ+JaQ7UK2V LiiFpgZlasfUl6ooP0QVVz8s4gebUXFtHabwI8kGt6I8ppS43XZdMRKQWYHPMb9CnRVTGmNca s4/KdEqco60/INrSBW/Pts8TBVUVXj7u6ZVja50Y8f4RqIxABa4cKQIjT9iV2Eyz2GOamb5G1 JcI26wyr3CsfJP5wDz7ok1M0hixxFCu0h1J17KOjxeCjgNGZbqA9Pzjftdnt1LgWW3SrO5F1B hSF5PA4QPxsraTNuqNAsRF9OEx5j9qtZi8WmNoRMfaa/EuZg43Fn3QcoDCFrAWeFaWqBW5lnT ZT+EEdyNsBONFhMWU4XHv21bu32PcGeREAHzK7urdDSLpWdSSD4VFRPPVT/Ce6rsyTkudjSs5 jgASF84ivgBbkLOoSrwkHhkN+gFudomNYssQUSbpG5pt+po3Db+38nk/LgJsXX6vWNEHFUUrU hR6YqkIQACvJdS2ZBfpXwL6m3xwUfU3Q4btQcLg/idzL11y87HLjlaBpSev/FVXqb2j18dybG o0xHv+PPS5h/OFf7EHU4xhnkMYLYn88De2kb7hZZ5Ny06lqe90+p1snoHhp6gXKwxUhpW+irA YGcrIZDMy+e3KE6XCKF9I/xg== =E5=9C=A8 2024/7/11 13:12, Russell Coker =E5=86=99=E9=81=93: > On Thursday, 11 July 2024 07:13:25 AEST Qu Wenruo wrote: >> =E5=9C=A8 2024/7/10 21:22, Russell Coker =E5=86=99=E9=81=93: >>> Below is the difference between running btrfs dev usa as root and non-= root >>> on a laptop with kernel 6.8.12-amd64. When run as non-root it gets >>> everything wrong and in my tests I have never been able to see it give >>> nay accurate data as non-root. I think it should just abort with an >>> error in that situation, there's no point in giving a wrong answer. >>> >>> # btrfs dev usa / >>> /dev/mapper/root, ID: 1 >>> >>> Device size: 476.37GiB >>> Device slack: 1.50KiB >>> Data,single: 216.01GiB >>> Metadata,DUP: 6.00GiB >>> System,DUP: 64.00MiB >>> Unallocated: 254.29GiB >>> >>> $ btrfs dev usa / >>> WARNING: cannot read detailed chunk info, per-device usage will not be >>> shown, run as root >>> /dev/mapper/root, ID: 1 >>> >>> Device size: 952.73MiB >>> Device slack: 16.00EiB >>> Unallocated: 476.37GiB >> >> Mind to post the raw result? >> >> The 16EiB output definitely means something wrong. >> >> So far the result looks like btrfs-progs is interpret the result wrong >> with some offset of the result. >> >> In my case, non-root call of "btrfs dev usage" always shows the slack a= s >> 0, and unallocated as N/A, so the 16EiB looks like some shift. > > # btrfs dev usa -b / > /dev/mapper/root, ID: 1 > Device size: 511493395968 The device size is 4K aligned. I guess it's some older fs? As newer mkfs would always round down to the sector size. > Device slack: 1536 > Data,single: 231936622592 > Metadata,DUP: 6442450944 > System,DUP: 67108864 > Unallocated: 273047212032 > > $ btrfs dev usa -b / > WARNING: cannot read detailed chunk info, per-device usage will not be s= hown, > run as root > /dev/mapper/root, ID: 1 > Device size: 999010539 > Device slack: 18446743563215167723 > Unallocated: 511493394432 > >> And what's the version of the btrfs-progs? > > The Debian package version is 6.6.3-1.2+b1. > It may be easier to debug by trying a newer version of btrfs-progs. And since I'm not sure if it's the unalignment causing problems, you may want to resize the fs by: # btrfs device resize -1M Then resize to max (which should always align the fs correctly): # btrfs device resize max And then check if the size is aligned to 4K and if the problem has changed= . Thanks, Qu