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[1/6] ext2: don't inherit inappropriate inode flags from parent

Message ID 1228334103-15948-2-git-send-email-duaneg@dghda.com
State Not Applicable, archived
Headers show

Commit Message

Duane Griffin Dec. 3, 2008, 7:54 p.m. UTC
At present BTREE/INDEX is the only flag that new ext2 inodes do NOT
inherit from their parent. In addition prevent the flags DIRTY, ECOMPR,
INDEX, IMAGIC and TOPDIR from being inherited. List inheritable flags
explicitly to prevent future flags from accidentally being inherited.

This fixes the TOPDIR flag inheritance bug reported at
http://bugzilla.kernel.org/show_bug.cgi?id=9866.

Signed-off-by: Duane Griffin <duaneg@dghda.com>
---
 fs/ext2/ialloc.c        |    2 +-
 include/linux/ext2_fs.h |    7 +++++++
 2 files changed, 8 insertions(+), 1 deletions(-)
diff mbox

Patch

diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
index 8d0add6..8c1897e 100644
--- a/fs/ext2/ialloc.c
+++ b/fs/ext2/ialloc.c
@@ -565,7 +565,7 @@  got:
 	inode->i_blocks = 0;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 	memset(ei->i_data, 0, sizeof(ei->i_data));
-	ei->i_flags = EXT2_I(dir)->i_flags & ~EXT2_BTREE_FL;
+	ei->i_flags = EXT2_I(dir)->i_flags & EXT2_FL_INHERITED;
 	if (S_ISLNK(mode))
 		ei->i_flags &= ~(EXT2_IMMUTABLE_FL|EXT2_APPEND_FL);
 	/* dirsync is only applied to directories */
diff --git a/include/linux/ext2_fs.h b/include/linux/ext2_fs.h
index 78c775a..c3a0518 100644
--- a/include/linux/ext2_fs.h
+++ b/include/linux/ext2_fs.h
@@ -194,6 +194,13 @@  struct ext2_group_desc
 #define EXT2_FL_USER_VISIBLE		FS_FL_USER_VISIBLE	/* User visible flags */
 #define EXT2_FL_USER_MODIFIABLE		FS_FL_USER_MODIFIABLE	/* User modifiable flags */
 
+/* Flags that should be inherited by new inodes from their parent. */
+#define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\
+			   EXT2_SYNC_FL | EXT2_IMMUTABLE_FL | EXT2_APPEND_FL |\
+			   EXT2_NODUMP_FL | EXT2_NOATIME_FL | EXT2_COMPRBLK_FL|\
+			   EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\
+			   EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL)
+
 /*
  * ioctl commands
  */