On 2023/3/13 19:12, Jan Kara wrote:
> On Fri 10-03-23 20:52:05, Zhihao Cheng wrote:
>> From: Zhang Yi <yi.zhang@xxxxxxxxxx>
>>
>> Current journal_get_superblock() couple journal superblock checking and
>> partial journal initialization, factor out initialization part from it
>> to make things clear.
>>
>> Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx>
>> Signed-off-by: Zhihao Cheng <chengzhihao1@xxxxxxxxxx>
>> ---
>> fs/jbd2/journal.c | 52 ++++++++++++++++++++---------------------------
>> 1 file changed, 22 insertions(+), 30 deletions(-)
>
> The patch looks mostly good. Just one style nit below.
>
>> diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
>> index b991d5c21d16..cd94d068b4e6 100644
>> --- a/fs/jbd2/journal.c
>> +++ b/fs/jbd2/journal.c
>> @@ -1921,26 +1921,15 @@ static int journal_get_superblock(journal_t *journal)
>> printk(KERN_WARNING "JBD2: no valid journal superblock found\n");
>> goto out;
>> }
>> -
>> - switch(be32_to_cpu(sb->s_header.h_blocktype)) {
>> - case JBD2_SUPERBLOCK_V1:
>> - journal->j_format_version = 1;
>> - break;
>> - case JBD2_SUPERBLOCK_V2:
>> - journal->j_format_version = 2;
>> - break;
>> - default:
>> + if (be32_to_cpu(sb->s_header.h_blocktype) != JBD2_SUPERBLOCK_V1 &&
>> + be32_to_cpu(sb->s_header.h_blocktype) != JBD2_SUPERBLOCK_V2) {
>> printk(KERN_WARNING "JBD2: unrecognised superblock format ID\n");
>> goto out;
>> }
>> -
>> - if (be32_to_cpu(sb->s_maxlen) < journal->j_total_len)
>> - journal->j_total_len = be32_to_cpu(sb->s_maxlen);
>> - else if (be32_to_cpu(sb->s_maxlen) > journal->j_total_len) {
>> + if (be32_to_cpu(sb->s_maxlen) > journal->j_total_len) {
>> printk(KERN_WARNING "JBD2: journal file too short\n");
>> goto out;
>> }
>> -
>
> Please keep this empty line here. It actually makes the code more readable,
> separating logically different checks. Same with three empty lines below...
Thanks for the comments, I will add them back.
Yi.
