[Ocfs2-devel] [PATCH] ocfs2: return -EROFS when filesystem becomes read-only

[piaojun]

Hi Joseph,

Thanks for reviewing, and I will post patch v2 to fix alignment.

Thanks,
Jun

On 2018/6/6 17:39, Joseph Qi wrote:
> Looks reasonable.
> But I suggest make the error messages alignment as well.
> 
> Thanks,
> Joseph
> 
> On 18/6/6 09:18, piaojun wrote:
>> We should return -EROFS rather than other errno if filesystem becomes
>> read-only.
>>
>> Signed-off-by: Jun Piao <piaojun at huawei.com>
>> Reviewed-by: Yiwen Jiang <jiangyiwen at huawei.com>
>> ---
>>  fs/ocfs2/alloc.c       | 15 +++++----------
>>  fs/ocfs2/localalloc.c  |  3 +--
>>  fs/ocfs2/quota_local.c |  7 +++----
>>  3 files changed, 9 insertions(+), 16 deletions(-)
>>
>> diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
>> index 0f157bb..453d39f 100644
>> --- a/fs/ocfs2/alloc.c
>> +++ b/fs/ocfs2/alloc.c
>> @@ -1481,19 +1481,17 @@ static int ocfs2_find_branch_target(struct ocfs2_extent_tree *et,
>>
>>  	while(le16_to_cpu(el->l_tree_depth) > 1) {
>>  		if (le16_to_cpu(el->l_next_free_rec) == 0) {
>> -			ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
>> +			status = ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
>>  				    "Owner %llu has empty extent list (next_free_rec == 0)\n",
>>  				    (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci));
>> -			status = -EIO;
>>  			goto bail;
>>  		}
>>  		i = le16_to_cpu(el->l_next_free_rec) - 1;
>>  		blkno = le64_to_cpu(el->l_recs[i].e_blkno);
>>  		if (!blkno) {
>> -			ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
>> +			status = ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
>>  				    "Owner %llu has extent list where extent # %d has no physical block start\n",
>>  				    (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci), i);
>> -			status = -EIO;
>>  			goto bail;
>>  		}
>>
>> @@ -3214,8 +3212,7 @@ static int ocfs2_rotate_tree_left(handle_t *handle,
>>  			goto rightmost_no_delete;
>>
>>  		if (le16_to_cpu(el->l_next_free_rec) == 0) {
>> -			ret = -EIO;
>> -			ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
>> +			ret = ocfs2_error(ocfs2_metadata_cache_get_super(et->et_ci),
>>  				    "Owner %llu has empty extent block at %llu\n",
>>  				    (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci),
>>  				    (unsigned long long)le64_to_cpu(eb->h_blkno));
>> @@ -4411,12 +4408,11 @@ static int ocfs2_figure_merge_contig_type(struct ocfs2_extent_tree *et,
>>  			    le16_to_cpu(new_el->l_count)) {
>>  				bh = path_leaf_bh(left_path);
>>  				eb = (struct ocfs2_extent_block *)bh->b_data;
>> -				ocfs2_error(sb,
>> +				status = ocfs2_error(sb,
>>  					    "Extent block #%llu has an invalid l_next_free_rec of %d.  It should have matched the l_count of %d\n",
>>  					    (unsigned long long)le64_to_cpu(eb->h_blkno),
>>  					    le16_to_cpu(new_el->l_next_free_rec),
>>  					    le16_to_cpu(new_el->l_count));
>> -				status = -EINVAL;
>>  				goto free_left_path;
>>  			}
>>  			rec = &new_el->l_recs[
>> @@ -4466,11 +4462,10 @@ static int ocfs2_figure_merge_contig_type(struct ocfs2_extent_tree *et,
>>  			if (le16_to_cpu(new_el->l_next_free_rec) <= 1) {
>>  				bh = path_leaf_bh(right_path);
>>  				eb = (struct ocfs2_extent_block *)bh->b_data;
>> -				ocfs2_error(sb,
>> +				status = ocfs2_error(sb,
>>  					    "Extent block #%llu has an invalid l_next_free_rec of %d\n",
>>  					    (unsigned long long)le64_to_cpu(eb->h_blkno),
>>  					    le16_to_cpu(new_el->l_next_free_rec));
>> -				status = -EINVAL;
>>  				goto free_right_path;
>>  			}
>>  			rec = &new_el->l_recs[1];
>> diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
>> index fe0d1f9..222a3d1 100644
>> --- a/fs/ocfs2/localalloc.c
>> +++ b/fs/ocfs2/localalloc.c
>> @@ -663,11 +663,10 @@ int ocfs2_reserve_local_alloc_bits(struct ocfs2_super *osb,
>>  #ifdef CONFIG_OCFS2_DEBUG_FS
>>  	if (le32_to_cpu(alloc->id1.bitmap1.i_used) !=
>>  	    ocfs2_local_alloc_count_bits(alloc)) {
>> -		ocfs2_error(osb->sb, "local alloc inode %llu says it has %u used bits, but a count shows %u\n",
>> +		status = ocfs2_error(osb->sb, "local alloc inode %llu says it has %u used bits, but a count shows %u\n",
>>  			    (unsigned long long)le64_to_cpu(alloc->i_blkno),
>>  			    le32_to_cpu(alloc->id1.bitmap1.i_used),
>>  			    ocfs2_local_alloc_count_bits(alloc));
>> -		status = -EIO;
>>  		goto bail;
>>  	}
>>  #endif
>> diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
>> index 16c42ed..d56cec1 100644
>> --- a/fs/ocfs2/quota_local.c
>> +++ b/fs/ocfs2/quota_local.c
>> @@ -137,14 +137,13 @@ static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
>>  	int rc = 0;
>>  	struct buffer_head *tmp = *bh;
>>
>> -	if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
>> -		ocfs2_error(inode->i_sb,
>> +	if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block)
>> +		return ocfs2_error(inode->i_sb,
>>  			    "Quota file %llu is probably corrupted! Requested to read block %Lu but file has size only %Lu\n",
>>  			    (unsigned long long)OCFS2_I(inode)->ip_blkno,
>>  			    (unsigned long long)v_block,
>>  			    (unsigned long long)i_size_read(inode));
>> -		return -EIO;
>> -	}
>> +
>>  	rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
>>  				    ocfs2_validate_quota_block);
>>  	if (rc)
>>
> .
>