Commit 55f9cf6b authored Jan 11, 2011 by Tyler Hicks

eCryptfs: Copy up lower inode attrs in getattr

The lower filesystem may do some type of inode revalidation during a
getattr call. eCryptfs should take advantage of that by copying the
lower inode attributes to the eCryptfs inode after a call to
vfs_getattr() on the lower inode.

I originally wrote this fix while working on eCryptfs on nfsv3 support,
but discovered it also fixed an eCryptfs on ext4 nanosecond timestamp
bug that was reported.

https://bugs.launchpad.net/bugs/613873



Cc: <stable@kernel.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>

parent 323ef68f

fs/ecryptfs/inode.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1010,6 +1010,8 @@ int ecryptfs_getattr(struct vfsmount mnt, struct dentry dentry,
	rc = vfs_getattr(ecryptfs_dentry_to_lower_mnt(dentry),		rc = vfs_getattr(ecryptfs_dentry_to_lower_mnt(dentry),
	ecryptfs_dentry_to_lower(dentry), &lower_stat);		ecryptfs_dentry_to_lower(dentry), &lower_stat);
	if (!rc) {		if (!rc) {
			fsstack_copy_attr_all(dentry->d_inode,
			ecryptfs_inode_to_lower(dentry->d_inode));
	generic_fillattr(dentry->d_inode, stat);		generic_fillattr(dentry->d_inode, stat);
	stat->blocks = lower_stat.blocks;		stat->blocks = lower_stat.blocks;
	}		}