[lustre-devel] [PATCH 15/22] ext4: remove bitmap corruption warnings

[James Simmons <jsimmons@infradead.org>]

Since we could skip corrupt block groups, this patch
use ext4_warning() intead of ext4_error() to make FS not
mount RO in default.

Signed-off-by: James Simmons <jsimmons@infradead.org>
---
 fs/ext4/balloc.c  | 10 ++++-----
 fs/ext4/ialloc.c  |  6 ++---
 fs/ext4/mballoc.c | 66 +++++++++++++++++++++++--------------------------------
 3 files changed, 35 insertions(+), 47 deletions(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index bca75c1..aff3981 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -374,7 +374,7 @@ static int ext4_validate_block_bitmap(struct super_block *sb,
 	if (unlikely(!ext4_block_bitmap_csum_verify(sb, block_group,
 			desc, bh))) {
 		ext4_unlock_group(sb, block_group);
-		ext4_error(sb, "bg %u: bad block bitmap checksum", block_group);
+		ext4_warning(sb, "bg %u: bad block bitmap checksum", block_group);
 		ext4_mark_group_bitmap_corrupted(sb, block_group,
 					EXT4_GROUP_INFO_BBITMAP_CORRUPT);
 		return -EFSBADCRC;
@@ -382,8 +382,8 @@ static int ext4_validate_block_bitmap(struct super_block *sb,
 	blk = ext4_valid_block_bitmap(sb, desc, block_group, bh);
 	if (unlikely(blk != 0)) {
 		ext4_unlock_group(sb, block_group);
-		ext4_error(sb, "bg %u: block %llu: invalid block bitmap",
-			   block_group, blk);
+		ext4_warning(sb, "bg %u: block %llu: invalid block bitmap",
+			     block_group, blk);
 		ext4_mark_group_bitmap_corrupted(sb, block_group,
 					EXT4_GROUP_INFO_BBITMAP_CORRUPT);
 		return -EFSCORRUPTED;
@@ -459,8 +459,8 @@ struct buffer_head *
 		ext4_unlock_group(sb, block_group);
 		unlock_buffer(bh);
 		if (err) {
-			ext4_error(sb, "Failed to init block bitmap for group "
-				   "%u: %d", block_group, err);
+			ext4_warning(sb, "Failed to init block bitmap for group "
+				     "%u: %d", block_group, err);
 			goto out;
 		}
 		goto verify;
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 68d41e6..a72fe63 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -96,8 +96,8 @@ static int ext4_validate_inode_bitmap(struct super_block *sb,
 	if (!ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh,
 					   EXT4_INODES_PER_GROUP(sb) / 8)) {
 		ext4_unlock_group(sb, block_group);
-		ext4_error(sb, "Corrupt inode bitmap - block_group = %u, "
-			   "inode_bitmap = %llu", block_group, blk);
+		ext4_warning(sb, "Corrupt inode bitmap - block_group = %u, "
+			     "inode_bitmap = %llu", block_group, blk);
 		ext4_mark_group_bitmap_corrupted(sb, block_group,
 					EXT4_GROUP_INFO_IBITMAP_CORRUPT);
 		return -EFSBADCRC;
@@ -346,7 +346,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
 		if (!fatal)
 			fatal = err;
 	} else {
-		ext4_error(sb, "bit already cleared for inode %lu", ino);
+		ext4_warning(sb, "bit already cleared for inode %lu", ino);
 		ext4_mark_group_bitmap_corrupted(sb, block_group,
 					EXT4_GROUP_INFO_IBITMAP_CORRUPT);
 	}
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 463fba6..82398b0 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -741,10 +741,15 @@ int ext4_mb_generate_buddy(struct super_block *sb,
 	grp->bb_fragments = fragments;
 
 	if (free != grp->bb_free) {
-		ext4_grp_locked_error(sb, group, 0, 0,
-				      "block bitmap and bg descriptor "
-				      "inconsistent: %u vs %u free clusters",
-				      free, grp->bb_free);
+		struct ext4_group_desc *gdp;
+
+		gdp = ext4_get_group_desc(sb, group, NULL);
+		ext4_warning(sb, "group %lu: block bitmap and bg descriptor "
+			     "inconsistent: %u vs %u free clusters "
+			     "%u in gd, %lu pa's",
+			     (long unsigned int)group, free, grp->bb_free,
+			     ext4_free_group_clusters(sb, gdp),
+			     grp->bb_prealloc_nr);
 		/*
 		 * If we intend to continue, we consider group descriptor
 		 * corrupt and update bb_free using bitmap value
@@ -1106,7 +1111,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group, gfp_t gfp)
 	int block;
 	int pnum;
 	int poff;
-	struct page *page;
+	struct page *page = NULL;
 	int ret;
 	struct ext4_group_info *grp;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -1132,7 +1137,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group, gfp_t gfp)
 		 */
 		ret = ext4_mb_init_group(sb, group, gfp);
 		if (ret)
-			return ret;
+			goto err;
 	}
 
 	/*
@@ -1235,6 +1240,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group, gfp_t gfp)
 		put_page(e4b->bd_buddy_page);
 	e4b->bd_buddy = NULL;
 	e4b->bd_bitmap = NULL;
+	ext4_warning(sb, "Error loading buddy information for %u", group);
 	return ret;
 }
 
@@ -3631,8 +3637,10 @@ int ext4_mb_check_ondisk_bitmap(struct super_block *sb, void *bitmap,
 	}
 
 	if (free != free_in_gdp) {
-		ext4_error(sb, "on-disk bitmap for group %d corrupted: %u blocks free in bitmap, %u - in gd\n",
-			   group, free, free_in_gdp);
+		ext4_warning(sb, "on-disk bitmap for group %d corrupted: %u blocks free in bitmap, %u - in gd\n",
+			     group, free, free_in_gdp);
+		ext4_mark_group_bitmap_corrupted(sb, group,
+						 EXT4_GROUP_INFO_BBITMAP_CORRUPT);
 		return -EIO;
 	}
 	return 0;
@@ -4015,14 +4023,6 @@ static int ext4_mb_new_preallocation(struct ext4_allocation_context *ac)
 	 * otherwise maybe leave some free blocks unavailable, no need to BUG.
 	 */
 	if ((free > pa->pa_free && !pa->pa_error) || (free < pa->pa_free)) {
-		ext4_error(sb, "pa free mismatch: [pa %p] "
-				"[phy %lu] [logic %lu] [len %u] [free %u] "
-				"[error %u] [inode %lu] [freed %u]", pa,
-				(unsigned long)pa->pa_pstart,
-				(unsigned long)pa->pa_lstart,
-				(unsigned)pa->pa_len, (unsigned)pa->pa_free,
-				(unsigned)pa->pa_error, pa->pa_inode->i_ino,
-				free);
 		ext4_grp_locked_error(sb, group, 0, 0, "free %u, pa_free %u",
 					free, pa->pa_free);
 		/*
@@ -4086,15 +4086,11 @@ static int ext4_mb_new_preallocation(struct ext4_allocation_context *ac)
 	bitmap_bh = ext4_read_block_bitmap(sb, group);
 	if (IS_ERR(bitmap_bh)) {
 		err = PTR_ERR(bitmap_bh);
-		ext4_error(sb, "Error %d reading block bitmap for %u",
-			   err, group);
 		return 0;
 	}
 
 	err = ext4_mb_load_buddy(sb, group, &e4b);
 	if (err) {
-		ext4_warning(sb, "Error %d loading buddy information for %u",
-			     err, group);
 		put_bh(bitmap_bh);
 		return 0;
 	}
@@ -4255,17 +4251,12 @@ void ext4_discard_preallocations(struct inode *inode)
 
 		err = ext4_mb_load_buddy_gfp(sb, group, &e4b,
 					     GFP_NOFS|__GFP_NOFAIL);
-		if (err) {
-			ext4_error(sb, "Error %d loading buddy information for %u",
-				   err, group);
+		if (err)
 			return;
-		}
 
 		bitmap_bh = ext4_read_block_bitmap(sb, group);
 		if (IS_ERR(bitmap_bh)) {
 			err = PTR_ERR(bitmap_bh);
-			ext4_error(sb, "Error %d reading block bitmap for %u",
-					err, group);
 			ext4_mb_unload_buddy(&e4b);
 			continue;
 		}
@@ -4527,11 +4518,8 @@ static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
 		group = ext4_get_group_number(sb, pa->pa_pstart);
 		err = ext4_mb_load_buddy_gfp(sb, group, &e4b,
 					     GFP_NOFS|__GFP_NOFAIL);
-		if (err) {
-			ext4_error(sb, "Error %d loading buddy information for %u",
-				   err, group);
+		if (err)
 			continue;
-		}
 		ext4_lock_group(sb, group);
 		list_del(&pa->pa_group_list);
 		ext4_get_group_info(sb, group)->bb_prealloc_nr--;
@@ -4785,7 +4773,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
 			 * not revert pa_free back, just mark pa_error
 			 */
 			pa->pa_error++;
-			ext4_error(sb,
+			ext4_warning(sb,
 				   "Updating bitmap error: [err %d] "
 				   "[pa %p] [phy %lu] [logic %lu] "
 				   "[len %u] [free %u] [error %u] "
@@ -4796,6 +4784,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
 				   (unsigned)pa->pa_free,
 				   (unsigned)pa->pa_error,
 				   pa->pa_inode ? pa->pa_inode->i_ino : 0);
+			ext4_mark_group_bitmap_corrupted(sb, 0, 0);
 		}
 	}
 	ext4_mb_release_context(ac);
@@ -5081,7 +5070,7 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
 	err = ext4_mb_load_buddy_gfp(sb, block_group, &e4b,
 				     GFP_NOFS|__GFP_NOFAIL);
 	if (err)
-		goto error_return;
+		goto error_brelse;
 
 	/*
 	 * We need to make sure we don't reuse the freed block until after the
@@ -5171,8 +5160,9 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
 		goto do_more;
 	}
 error_return:
-	brelse(bitmap_bh);
 	ext4_std_error(sb, err);
+error_brelse:
+	brelse(bitmap_bh);
 	return;
 }
 
@@ -5272,7 +5262,7 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
 
 	err = ext4_mb_load_buddy(sb, block_group, &e4b);
 	if (err)
-		goto error_return;
+		goto error_brelse;
 
 	/*
 	 * need to update group_info->bb_free and bitmap
@@ -5310,8 +5300,9 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
 		err = ret;
 
 error_return:
-	brelse(bitmap_bh);
 	ext4_std_error(sb, err);
+error_brelse:
+	brelse(bitmap_bh);
 	return err;
 }
 
@@ -5386,11 +5377,8 @@ static int ext4_trim_extent(struct super_block *sb, int start, int count,
 	trace_ext4_trim_all_free(sb, group, start, max);
 
 	ret = ext4_mb_load_buddy(sb, group, &e4b);
-	if (ret) {
-		ext4_warning(sb, "Error %d loading buddy information for %u",
-			     ret, group);
+	if (ret)
 		return ret;
-	}
 	bitmap = e4b.bd_bitmap;
 
 	ext4_lock_group(sb, group);
-- 
1.8.3.1