Received-SPF: pass (google.com: domain of linux-kernel+bounces-22927-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
Message-ID: <e7f4a835-6a4c-4f94-a79f-a425b04516e2@kernel.org>
Date: Thu, 11 Jan 2024 09:33:21 +0800
Precedence: bulk
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [f2fs-dev] [PATCH v3 3/6] f2fs: compress: fix to check unreleased
 compressed cluster
Content-Language: en-US
To: Daeho Jeong <daeho43@gmail.com>
Cc: jaegeuk@kernel.org, linux-kernel@vger.kernel.org,
 linux-f2fs-devel@lists.sourceforge.net
References: <20231228143152.1543509-1-chao@kernel.org>
 <20231228143152.1543509-3-chao@kernel.org>
 <CACOAw_xCfOtJaC3FbOhvbrEzyUwecdSujFo4-f--dz+33BC+Sg@mail.gmail.com>
From: Chao Yu <chao@kernel.org>
Autocrypt: addr=chao@kernel.org; keydata=
 xsFNBFYs6bUBEADJuxYGZRMvAEySns+DKVtVQRKDYcHlmj+s9is35mtlhrLyjm35FWJY099R
 6DL9bp8tAzLJOMBn9RuTsu7hbRDErCCTiyXWAsFsPkpt5jgTOy90OQVyTon1i/fDz4sgGOrL
 1tUfcx4m5i5EICpdSuXm0dLsC5lFB2KffLNw/ZfRuS+nNlzUm9lomLXxOgAsOpuEVps7RdYy
 UEC81IYCAnweojFbbK8U6u4Xuu5DNlFqRFe/MBkpOwz4Nb+caCx4GICBjybG1qLl2vcGFNkh
 eV2i8XEdUS8CJP2rnp0D8DM0+Js+QmAi/kNHP8jzr7CdG5tje1WIVGH6ec8g8oo7kIuFFadO
 kwy6FSG1kRzkt4Ui2d0z3MF5SYgA1EWQfSqhCPzrTl4rJuZ72ZVirVxQi49Ei2BI+PQhraJ+
 pVXd8SnIKpn8L2A/kFMCklYUaLT8kl6Bm+HhKP9xYMtDhgZatqOiyVV6HFewfb58HyUjxpza
 1C35+tplQ9klsejuJA4Fw9y4lhdiFk8y2MppskaqKg950oHiqbJcDMEOfdo3NY6/tXHFaeN1
 etzLc1N3Y0pG8qS/mehcIXa3Qs2fcurIuLBa+mFiFWrdfgUkvicSYqOimsrE/Ezw9hYhAHq4
 KoW4LQoKyLbrdOBJFW0bn5FWBI4Jir1kIFHNgg3POH8EZZDWbQARAQABzRlDaGFvIFl1IDxj
 aGFvQGtlcm5lbC5vcmc+wsF3BBMBCgAhBQJWLOm1AhsDBQsJCAcDBRUKCQgLBRYCAwEAAh4B
 AheAAAoJEKTPgB1/p52Gm2MP/0zawCU6QN7TZuJ8R1yfdhYr0cholc8ZuPoGim69udQ3otet
 wkTNARnpuK5FG5la0BxFKPlazdgAU1pt+dTzCTS6a3/+0bXYQ5DwOeBPRWeFFklm5Frmk8sy
 wSTxxEty0UBMjzElczkJflmCiDfQunBpWGy9szn/LZ6jjIVK/BiR7CgwXTdlvKcCEkUlI7MD
 vTj/4tQ3y4Vdx+p7P53xlacTzZkP+b6D2VsjK+PsnsPpKwaiPzVFMUwjt1MYtOupK4bbDRB4
 NIFSNu2HSA0cjsu8zUiiAvhd/6gajlZmV/GLJKQZp0MjHOvFS5Eb1DaRvoCf27L+BXBMH4Jq
 2XIyBMm+xqDJd7BRysnImal5NnQlKnDeO4PrpFq4JM0P33EgnSOrJuAb8vm5ORS9xgRlshXh
 2C0MeyQFxL6l+zolEFe2Nt2vrTFgjYLsm2vPL+oIPlE3j7ToRlmm7DcAqsa9oYMlVTTnPRL9
 afNyrsocG0fvOYFCGvjfog/V56WFXvy9uH8mH5aNOg5xHB0//oG9vUyY0Rv/PrtW897ySEPh
 3jFP/EDI0kKjFW3P6CfYG/X1eaw6NDfgpzjkCf2/bYm/SZLV8dL2vuLBVV+hrT1yM1FcZotP
 WwLEzdgdQffuQwJHovz72oH8HVHD2yvJf2hr6lH58VK4/zB/iVN4vzveOdzlzsFNBFYs6bUB
 EADZTCTgMHkb6bz4bt6kkvj7+LbftBt5boKACy2mdrFFMocT5zM6YuJ7Ntjazk5z3F3IzfYu
 94a41kLY1H/G0Y112wggrxem6uAtUiekR9KnphsWI9lRI4a2VbbWUNRhCQA8ag7Xwe5cDIV5
 qb7r7M+TaKaESRx/Y91bm0pL/MKfs/BMkYsr3wA1OX0JuEpV2YHDW8m2nFEGP6CxNma7vzw+
 JRxNuyJcNi+VrLOXnLR6hZXjShrmU88XIU2yVXVbxtKWq8vlOSRuXkLh9NQOZn7mrR+Fb1EY
 DY1ydoR/7FKzRNt6ejI8opHN5KKFUD913kuT90wySWM7Qx9icc1rmjuUDz3VO+rl2sdd0/1h
 Q2VoXbPFxi6c9rLiDf8t7aHbYccst/7ouiHR/vXQty6vSUV9iEbzm+SDpHzdA8h3iPJs6rAb
 0NpGhy3XKY7HOSNIeHvIbDHTUZrewD2A6ARw1VYg1vhJbqUE4qKoUL1wLmxHrk+zHUEyLHUq
 aDpDMZArdNKpT6Nh9ySUFzlWkHUsj7uUNxU3A6GTum2aU3Gh0CD1p8+FYlG1dGhO5boTIUsR
 6ho73ZNk1bwUj/wOcqWu+ZdnQa3zbfvMI9o/kFlOu8iTGlD8sNjJK+Y/fPK3znFqoqqKmSFZ
 aiRALjAZH6ufspvYAJEJE9eZSX7Rtdyt30MMHQARAQABwsFfBBgBCgAJBQJWLOm1AhsMAAoJ
 EKTPgB1/p52GPpoP/2LOn/5KSkGHGmdjzRoQHBTdm2YV1YwgADg52/mU68Wo6viStZqcVEnX
 3ALsWeETod3qeBCJ/TR2C6hnsqsALkXMFFJTX8aRi/E4WgBqNvNgAkWGsg5XKB3JUoJmQLqe
 CGVCT1OSQA/gTEfB8tTZAGFwlw1D3W988CiGnnRb2EEqU4pEuBoQir0sixJzFWybf0jjEi7P
 pODxw/NCyIf9GNRNYByUTVKnC7C51a3b1gNs10aTUmRfQuu+iM5yST5qMp4ls/yYl5ybr7N1
 zSq9iuL13I35csBOn13U5NE67zEb/pCFspZ6ByU4zxChSOTdIJSm4/DEKlqQZhh3FnVHh2Ld
 eG/Wbc1KVLZYX1NNbXTz7gBlVYe8aGpPNffsEsfNCGsFDGth0tC32zLT+5/r43awmxSJfx2P
 5aGkpdszvvyZ4hvcDfZ7U5CBItP/tWXYV0DDl8rCFmhZZw570vlx8AnTiC1v1FzrNfvtuxm3
 92Qh98hAj3cMFKtEVbLKJvrc2AO+mQlS7zl1qWblEhpZnXi05S1AoT0gDW2lwe54VfT3ySon
 8Klpbp5W4eEoY21tLwuNzgUMxmycfM4GaJWNCncKuMT4qGVQO9SPFs0vgUrdBUC5Pn5ZJ46X
 mZA0DUz0S8BJtYGI0DUC/jAKhIgy1vAx39y7sAshwu2VILa71tXJ
In-Reply-To: <CACOAw_xCfOtJaC3FbOhvbrEzyUwecdSujFo4-f--dz+33BC+Sg@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit

On 2024/1/11 9:18, Daeho Jeong wrote:
> On Thu, Dec 28, 2023 at 6:33 AM Chao Yu <chao@kernel.org> wrote:
>>
>> From: Sheng Yong <shengyong@oppo.com>
>>
>> Compressed cluster may not be released due to we can fail in
>> release_compress_blocks(), fix to handle reserved compressed
>> cluster correctly in reserve_compress_blocks().
>>
>> Fixes: 4c8ff7095bef ("f2fs: support data compression")
>> Signed-off-by: Sheng Yong <shengyong@oppo.com>
>> Signed-off-by: Chao Yu <chao@kernel.org>
>> ---
>>   fs/f2fs/file.c | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>>
>> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
>> index 026d05a7edd8..782ae3be48f6 100644
>> --- a/fs/f2fs/file.c
>> +++ b/fs/f2fs/file.c
>> @@ -3624,6 +3624,15 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
>>                                  goto next;
>>                          }
>>
>> +                       /*
>> +                        * compressed cluster was not released due to
>> +                        * it fails in release_compress_blocks().
>> +                        */
>> +                       if (blkaddr == NEW_ADDR) {
>> +                               compr_blocks++;
>> +                               continue;
>> +                       }
>> +
>>                          if (__is_valid_data_blkaddr(blkaddr)) {
>>                                  compr_blocks++;
>>                                  continue;
> 
> How about merging two conditions like "blkaddr == NEW_ADDR ||
> __is_valid_data_blkaddr(blkaddr)"?

Oh, sure.

> 
>> @@ -3633,6 +3642,9 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
>>                  }
>>
>>                  reserved = cluster_size - compr_blocks;
>> +               if (!reserved)
>> +                       goto next;
>> +
> 
> How can the reserved variable be zero?

I guess it can happen if a cluster was not released during
release_compress_blocks(), then all blocks in the cluster should
has been reserved, so, in this round of reserving, it needs to skip
reserve blocks, right?

Thanks,

> 
>>                  ret = inc_valid_block_count(sbi, dn->inode, &reserved);
>>                  if (ret)
>>                          return ret;
>> --
>> 2.40.1
>>
>>
>>
>> _______________________________________________
>> Linux-f2fs-devel mailing list
>> Linux-f2fs-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel