Ocfs2 devel - Jun 2018 - [PATCH] ocfs2: return -EROFS when filesystem becomes read-only

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)
--

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)
>