linux-ext4 - [PATCH] ext2: Return after ext2

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Message-Id: <1193288030-7775-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
Date:	Thu, 25 Oct 2007 10:23:48 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	akpm@...ux-foundation.org
Cc:	linux-ext4@...r.kernel.org,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: [PATCH] ext2: Return after ext2_error in case of failures

This fix some instances where we were continuing
after calling ext2_error. ext2_error call panic
only if errors=panic mount option is set. So
we need to make sure we return correctly after
ext2_error call

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
---
 fs/ext2/balloc.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 18a42de..ed48553 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -96,11 +96,13 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
 		return NULL;
 	bitmap_blk = le32_to_cpu(desc->bg_block_bitmap);
 	bh = sb_bread(sb, bitmap_blk);
-	if (!bh)
+	if (!bh) {
 		ext2_error (sb, __FUNCTION__,
 			    "Cannot read block bitmap - "
 			    "block_group = %d, block_bitmap = %u",
 			    block_group, le32_to_cpu(desc->bg_block_bitmap));
+		return NULL;
+	}
 
 	/* check whether block bitmap block number is set */
 	if (!block_in_use(bitmap_blk, sb, bh->b_data)) {
@@ -513,11 +515,13 @@ do_more:
 	    in_range (block, le32_to_cpu(desc->bg_inode_table),
 		      sbi->s_itb_per_group) ||
 	    in_range (block + count - 1, le32_to_cpu(desc->bg_inode_table),
-		      sbi->s_itb_per_group))
+		      sbi->s_itb_per_group)) {
 		ext2_error (sb, "ext2_free_blocks",
 			    "Freeing blocks in system zones - "
 			    "Block = %lu, count = %lu",
 			    block, count);
+		goto error_return;
+	}
 
 	for (i = 0, group_freed = 0; i < count; i++) {
 		if (!ext2_clear_bit_atomic(sb_bgl_lock(sbi, block_group),
@@ -1350,11 +1354,13 @@ allocated:
 	    in_range(ret_block, le32_to_cpu(gdp->bg_inode_table),
 		      EXT2_SB(sb)->s_itb_per_group) ||
 	    in_range(ret_block + num - 1, le32_to_cpu(gdp->bg_inode_table),
-		      EXT2_SB(sb)->s_itb_per_group))
+		      EXT2_SB(sb)->s_itb_per_group)) {
 		ext2_error(sb, "ext2_new_blocks",
 			    "Allocating block in system zone - "
 			    "blocks from "E2FSBLK", length %lu",
 			    ret_block, num);
+		goto out;
+	}
 
 	performed_allocation = 1;
 
-- 
1.5.3.4.319.gdd817-dirty

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