On 2019/5/28 11:02, Chao Yu wrote:
> On 2019/5/28 10:36, Gao Xiang wrote:
>> For compressed files, i_blocks should not be calculated
>> by using i_size. i_u.compressed_blocks is used instead.
>>
>> In addition, i_blocks was miscalculated for non-compressed
>> files previously, fix it as well.
>>
>> Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx>
>> ---
>> change log v2:
>> - fix description in commit message
>> - fix to 'inode->i_blocks = nblks << LOG_SECTORS_PER_BLOCK'
>>
>> Thanks,
>> Gao Xiang
>>
>> drivers/staging/erofs/inode.c | 14 ++++++++++++--
>> 1 file changed, 12 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/staging/erofs/inode.c b/drivers/staging/erofs/inode.c
>> index 8da144943ed6..6e67e018784e 100644
>> --- a/drivers/staging/erofs/inode.c
>> +++ b/drivers/staging/erofs/inode.c
>> @@ -20,6 +20,7 @@ static int read_inode(struct inode *inode, void *data)
>> struct erofs_vnode *vi = EROFS_V(inode);
>> struct erofs_inode_v1 *v1 = data;
>> const unsigned int advise = le16_to_cpu(v1->i_advise);
>> + erofs_blk_t nblks = 0;
>>
>> vi->data_mapping_mode = __inode_data_mapping(advise);
>>
>> @@ -60,6 +61,10 @@ static int read_inode(struct inode *inode, void *data)
>> le32_to_cpu(v2->i_ctime_nsec);
>>
>> inode->i_size = le64_to_cpu(v2->i_size);
>> +
>> + /* total blocks for compressed files */
>> + if (vi->data_mapping_mode == EROFS_INODE_LAYOUT_COMPRESSION)
>> + nblks = v2->i_u.compressed_blocks;
>
> Xiang,
>
> It needs to use le32_to_cpu(). ;)
Already fixed in v3... Sorry about that...
Thanks,
Gao Xiang
>
>> } else if (__inode_version(advise) == EROFS_INODE_LAYOUT_V1) {
>> struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb);
>>
>> @@ -90,6 +95,8 @@ static int read_inode(struct inode *inode, void *data)
>> sbi->build_time_nsec;
>>
>> inode->i_size = le32_to_cpu(v1->i_size);
>> + if (vi->data_mapping_mode == EROFS_INODE_LAYOUT_COMPRESSION)
>> + nblks = v1->i_u.compressed_blocks;
>
> Ditto.
>
> Thanks,
>
>> } else {
>> errln("unsupported on-disk inode version %u of nid %llu",
>> __inode_version(advise), vi->nid);
>> @@ -97,8 +104,11 @@ static int read_inode(struct inode *inode, void *data)
>> return -EIO;
>> }
>>
>> - /* measure inode.i_blocks as the generic filesystem */
>> - inode->i_blocks = ((inode->i_size - 1) >> 9) + 1;
>> + if (!nblks)
>> + /* measure inode.i_blocks as generic filesystems */
>> + inode->i_blocks = roundup(inode->i_size, EROFS_BLKSIZ) >> 9;
>> + else
>> + inode->i_blocks = nblks << LOG_SECTORS_PER_BLOCK;
>> return 0;
>> }
>>
>>
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