[lustre-devel] [PATCH 19/22] ext4: don't check before replay

[NeilBrown <neilb@suse.com>]

On Sun, Jul 21 2019, James Simmons wrote:

> When ldiskfs run in failover mode whith read-only disk.
> Part of allocation updates are lost and ldiskfs may fail
> while mounting this is due to inconsistent state of
> group-descriptor. Group-descriptor check is added after
> journal replay.

I think this needs to be enabled by a mount option or super-block flag.

NeilBrown


>
> Signed-off-by: James Simmons <jsimmons@infradead.org>
> ---
>  fs/ext4/super.c | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index a3179b2..b818acb 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -4255,11 +4255,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  		}
>  	}
>  	sbi->s_gdb_count = db_count;
> -	if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
> -		ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
> -		ret = -EFSCORRUPTED;
> -		goto failed_mount2;
> -	}
>  
>  	timer_setup(&sbi->s_err_report, print_daily_error_info, 0);
>  
> @@ -4401,6 +4396,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
>  	sbi->s_journal->j_commit_callback = ext4_journal_commit_callback;
>  
>  no_journal:
> +	if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
> +		ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
> +		ret = -EFSCORRUPTED;
> +		goto failed_mount_wq;
> +	}
> +
>  	if (!test_opt(sb, NO_MBCACHE)) {
>  		sbi->s_ea_block_cache = ext4_xattr_create_cache();
>  		if (!sbi->s_ea_block_cache) {
> -- 
> 1.8.3.1
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