linux-ext4 - [PATCH 2/7] libext2fs: Fix ext2fs_iblk_{add,sub}_blocks() when the i_blocks

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Date:	Thu, 22 Jul 2010 10:03:13 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Renzo Davoli <renzo@...unibo.it>
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	Theodore Ts'o <tytso@....edu>
Subject: [PATCH 2/7] libext2fs: Fix ext2fs_iblk_{add,sub}_blocks() when the i_blocks_hi is non-zero

Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
 lib/ext2fs/i_block.c |   17 +++++++++--------
 1 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/lib/ext2fs/i_block.c b/lib/ext2fs/i_block.c
index 822776d..39d93ee 100644
--- a/lib/ext2fs/i_block.c
+++ b/lib/ext2fs/i_block.c
@@ -31,6 +31,9 @@ errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
 {
 	unsigned long long b = inode->i_blocks;
 
+	if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
+		b += ((long long) inode->osd2.linux2.l_i_blocks_hi) << 32;
+
 	if (!(fs->super->s_feature_ro_compat &
 	      EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
 	    !(inode->i_flags & EXT4_HUGE_FILE_FL))
@@ -38,11 +41,9 @@ errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
 
 	b += num_blocks;
 
-	if (fs->super->s_feature_ro_compat &
-	    EXT4_FEATURE_RO_COMPAT_HUGE_FILE) {
-		b += ((long long) inode->osd2.linux2.l_i_blocks_hi) << 32;
+	if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
 		inode->osd2.linux2.l_i_blocks_hi = b >> 32;
-	} else if (b > 0xFFFFFFFF)
+	else if (b > 0xFFFFFFFF)
 		return EOVERFLOW;
 	inode->i_blocks = b & 0xFFFFFFFF;
 	return 0;
@@ -53,6 +54,9 @@ errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
 {
 	unsigned long long b = inode->i_blocks;
 
+	if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
+		b += ((long long) inode->osd2.linux2.l_i_blocks_hi) << 32;
+
 	if (!(fs->super->s_feature_ro_compat &
 	      EXT4_FEATURE_RO_COMPAT_HUGE_FILE) ||
 	    !(inode->i_flags & EXT4_HUGE_FILE_FL))
@@ -63,11 +67,8 @@ errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
 
 	b -= num_blocks;
 
-	if (fs->super->s_feature_ro_compat &
-	    EXT4_FEATURE_RO_COMPAT_HUGE_FILE) {
-		b += ((long long) inode->osd2.linux2.l_i_blocks_hi) << 32;
+	if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
 		inode->osd2.linux2.l_i_blocks_hi = b >> 32;
-	}
 	inode->i_blocks = b & 0xFFFFFFFF;
 	return 0;
 }
-- 
1.7.0.4

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