ocfs2: return -EROFS when filesystem becomes read-only

We should return -EROFS rather than other errno if filesystem becomes
read-only.

[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/5B191B26.9010501@huawei.com
Signed-off-by: Jun Piao <piaojun@huawei.com>
Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com>
Acked-by: Joseph Qi <jiangqi903@gmail.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 19 insertions, 24 deletions

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 0f157bbd3e0f..676714fef869 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),
-				    "Owner %llu has empty extent list (next_free_rec == 0)\n",
-				    (unsigned long long)ocfs2_metadata_cache_owner(et->et_ci));
-			status = -EIO;
+			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));
 			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),
-				    "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;
+			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);
 			goto bail;
 		}
 
@@ -3214,11 +3212,10 @@ rightmost_no_delete:
 			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),
-				    "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));
+			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));
 			goto out;
 		}
 
@@ -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,
-					    "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;
+				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));
 				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,
-					    "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;
+				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));
 				goto free_right_path;
 			}
 			rec = &new_el->l_recs[1];