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Wed, 21 Aug 2024 00:55:20 +0200 Message-ID: Date: Wed, 21 Aug 2024 08:25:17 +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: Errors found in extent allocation tree (single bit flipped) To: Pieter P , linux-btrfs@vger.kernel.org References: 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: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:4P9lbHZ2J9Yj4maIqzQ9ASQN39gystr5bwGfINUN9pI9JkIMuqR 5/btIqjm8WUN+zb5IrJTIBaoHk0oZuY+FQ+fb/c8OVCsXrUOjxYhjfIK2pWhGhkzU+HyHo0 UHKYD9rWsLS9y6UlqgZC1AcEuIRYQFLldwJ/AYba9hf7a3VumXk35qoKfTThmG4bAJ8DFtl dZa8Zg8JIkoDT9qD5rnCA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:H3mREW1QjsI=;8nNAFce+6J5975XO9dz6xL+JzS5 4yKqTxvn4SERDPQm+hqEYftVhWNHOOwdqKsno7/CcAFBG7jNzfr1BvMG6DYVlkfwnrt3nm+ex Q7BzvRED6tRMVr3oQs8Q0dEOt+gWpnhcxnHnj+sbiOoiOKXKlVZ380XZX/IGsux5O9hQe4/yU UD4cCcPf8qVIbBR8yDl8vDeyal2w/CKQYlFUzHfsPRuSEIuAwUCj5GyobHDo0rQgE2mqxXuIk J9XDXcR+pkNlUQdk+EhJBHTFx28Om5oloieshSMGyc8XEFTWM0rqN6zU2OkxJH2ThPcvnxqf5 szfkx0xfyHLjUOuTOmPKynqBaWV8Ja65KwEVoYU14tOX73Z2NGfDDzKD0F79hOMF6u8KmICX8 AIf0L6HujV6+zKKStIdpR83ZTIA5DlcdhO/SmXV32Reybkk6bqf2yUT/WaQ4w9EFvPJkoX/NZ kznE8rBJUkME2jIfbvIgjiuGTI8ePDWmMuVGONiKgk5MwbHtGxpgNAgRdvbW5MFy3WQCOunPL tWUoZ8QgUlDhVRrlOrkjkvXLblfw3CcuHzVGwIlaGNC2BJjsjLaoK2196XJkNnCqUsNFcGjvE lQ8nIZ6cUidfPx6MpJn6MVs+iTkwzWpm7TW5RHaPGMpwGUIzg8wrxU1iyAKoYDE7IOAyihxvr Dbdyrx3J7aR0/VKRvbtrMp1TUMR5pX/61SJiDM3Kvz8xJV8PVgTuXGjuVyBakLtoGaTFEDGJQ xikBtrb+3JX8iQNwgOTs77Q+CNEZz6CYpYPBS2TlO7W9szk4Q7GWKCcvRPasyaM9LZ3HjeIxM KaFE2tm2blBLV484SMwZF33g== =E5=9C=A8 2024/8/20 23:31, Pieter P =E5=86=99=E9=81=93: > On 12/08/2024 16:57, Pieter P wrote: >> Can this problem be fixed by running btrfs check --repair from a live >> USB? (I'm using Ubuntu 22.04 with btrfs-progs v5.16.2). > > Turns out, the answer is no :( > I tried this on (a copy of) a backup image of the corrupt file system, > and btrfs check --repair simply failed in step [2/7]. The corruption is not in extent tree, but seemingly inside the subvolume tree. And in that case, "btrfs check --mode=3Dlowmem" output may help a little more, and the same for "btrfs check --repair --mode=3Dlowmem". > > 1. What should my next move be? How can I fix my file system? If above lowmem mode still doesn't work, I can craft a tool for your specific corruption if really needed. But that will need the dump of your subvolume 257 inode 50058751. > 2. Or if that's not possible, how to figure out which files may be > lost/corrupt when copying everything to a fresh btrfs partition? Subvolume 257, inode 50058751. > 3. When creating a new file system, can I somehow "clone" the subvolumes > on my current file system (e.g. @ and @home, and the dozens of > subvolumes created by Docker)? Btrfs send should still be fine, except subvolume 257. Thanks, Qu > > Thanks, > Pieter > >