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authorDuane Griffin <duaneg@dghda.com>2009-01-07 18:07:21 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 08:31:00 -0800
commitef8b646183868b2d042fa6cde0eef2a31263ff85 (patch)
tree5f8ebd60f844fcb7b1b056d6d663151a2f5e16f9 /fs/ext2
parent0e090f1e05a563cc9acdda442767176bf1616001 (diff)
ext2: tighten restrictions on inode flags
At the moment there are few restrictions on which flags may be set on which inodes. Specifically DIRSYNC may only be set on directories and IMMUTABLE and APPEND may not be set on links. Tighten that to disallow TOPDIR being set on non-directories and only NODUMP and NOATIME to be set on non-regular file, non-directories. Introduces a flags masking function which masks flags based on mode and use it during inode creation and when flags are set via the ioctl to facilitate future consistency. Signed-off-by: Duane Griffin <duaneg@dghda.com> Acked-by: Andreas Dilger <adilger@sun.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ext2')
-rw-r--r--fs/ext2/ialloc.c8
-rw-r--r--fs/ext2/ioctl.c3
2 files changed, 3 insertions, 8 deletions
diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
index b5598e1393d..66321a877e7 100644
--- a/fs/ext2/ialloc.c
+++ b/fs/ext2/ialloc.c
@@ -565,12 +565,8 @@ 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_FL_INHERITED;
- if (S_ISLNK(mode))
- ei->i_flags &= ~(EXT2_IMMUTABLE_FL|EXT2_APPEND_FL);
- /* dirsync is only applied to directories */
- if (!S_ISDIR(mode))
- ei->i_flags &= ~EXT2_DIRSYNC_FL;
+ ei->i_flags =
+ ext2_mask_flags(mode, EXT2_I(dir)->i_flags & EXT2_FL_INHERITED);
ei->i_faddr = 0;
ei->i_frag_no = 0;
ei->i_frag_size = 0;
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index de876fa793e..7cb4badef92 100644
--- a/fs/ext2/ioctl.c
+++ b/fs/ext2/ioctl.c
@@ -50,8 +50,7 @@ long ext2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
goto setflags_out;
}
- if (!S_ISDIR(inode->i_mode))
- flags &= ~EXT2_DIRSYNC_FL;
+ flags = ext2_mask_flags(inode->i_mode, flags);
mutex_lock(&inode->i_mutex);
/* Is it quota file? Do not allow user to mess with it */