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ANDROID: sdcardfs: copy lower inode attributes in ->ioctl

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Adapted from wrapfs
commit fbc9c6f83ea6 ("Wrapfs: copy lower inode attributes in ->ioctl")
commit e97d8e26cc9e ("Wrapfs: use file_inode helper")

Some ioctls (e.g., EXT2_IOC_SETFLAGS) can change inode attributes, so copy
them from lower inode.

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Bug: 35766959
Change-Id: I0f12684b9dbd4088b4a622c7ea9c03087f40e572
This commit is contained in:
Daniel Rosenberg 2017-03-09 21:24:58 -08:00 committed by Artem Borisov
parent 21af28ae07
commit 4923777bb0
1 changed files with 4 additions and 0 deletions
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4
fs/sdcardfs/file.c
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@ -113,6 +113,10 @@ static long sdcardfs_unlocked_ioctl(struct file *file, unsigned int cmd,
if (lower_file->f_op->unlocked_ioctl)
err = lower_file->f_op->unlocked_ioctl(lower_file, cmd, arg);
/* some ioctls can change inode attributes (EXT2_IOC_SETFLAGS) */
if (!err)
sdcardfs_copy_and_fix_attrs(file->f_path.dentry->d_inode,
lower_file->f_path.dentry->d_inode);
out:
return err;
}