linux-kernel - [PATCH 3/3] ext4: don't inherit inappropriate inode flags from parent

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Message-Id: <1212583588-5754-4-git-send-email-duaneg@dghda.com>
Date:	Wed,  4 Jun 2008 13:46:28 +0100
From:	"Duane Griffin" <duaneg@...da.com>
To:	akpm@...ux-foundation.org
Cc:	Andreas Dilger <adilger@....com>, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, Duane Griffin <duaneg@...da.com>
Subject: [PATCH 3/3] ext4: don't inherit inappropriate inode flags from parent

At present INDEX and EXTENTS are the only flagis that new ext4 inodes do
NOT inherit from their parent. In addition prevent the flags DIRTY, ECOMPR,
IMAGIC, TOPDIR and HUGE_FILE from being inherited.

Signed-off-by: Duane Griffin <duaneg@...da.com>

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 8158083..de07dc7 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -235,6 +235,11 @@ struct ext4_group_desc
 #define EXT4_FL_USER_VISIBLE		0x000BDFFF /* User visible flags */
 #define EXT4_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */
 
+/* Flags that should be inherited by new inodes from their parent. */
+#define EXT4_FL_INHERITED ~(EXT4_DIRTY_FL | EXT4_ECOMPR_FL | EXT4_INDEX_FL |\
+			    EXT4_IMAGIC_FL | EXT4_TOPDIR_FL |\
+			    EXT4_HUGE_FILE_FL | EXT4_EXTENTS_FL)
+
 /*
  * Inode dynamic state flags
  */
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index c6efbab..ff25d57 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -702,7 +702,7 @@ got:
 	 * newly created directory and file only if -o extent mount option is
 	 * specified
 	 */
-	ei->i_flags = EXT4_I(dir)->i_flags & ~(EXT4_INDEX_FL|EXT4_EXTENTS_FL);
+	ei->i_flags = EXT4_I(dir)->i_flags & EXT4_FL_INHERITED;
 	if (S_ISLNK(mode))
 		ei->i_flags &= ~(EXT4_IMMUTABLE_FL|EXT4_APPEND_FL);
 	/* dirsync only applies to directories */
-- 
1.5.3.7

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