[46/68] eCryptfs: Copy up lower inode attrs in getattr

From: Greg KH
Date: Mon Feb 28 2011 - 11:43:40 EST

2.6.32-longterm review patch. If anyone has any objections, please let us know.


From: Tyler Hicks <tyhicks@xxxxxxxxxxxxxxxxxx>

commit 55f9cf6bbaa682958a7dd2755f883b768270c3ce upstream.

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.


Signed-off-by: Tyler Hicks <tyhicks@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

fs/ecryptfs/inode.c | 2 ++
1 file changed, 2 insertions(+)

--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -988,6 +988,8 @@ int ecryptfs_getattr(struct vfsmount *mn
rc = vfs_getattr(ecryptfs_dentry_to_lower_mnt(dentry),
ecryptfs_dentry_to_lower(dentry), &lower_stat);
if (!rc) {
+ fsstack_copy_attr_all(dentry->d_inode,
+ ecryptfs_inode_to_lower(dentry->d_inode), NULL);
generic_fillattr(dentry->d_inode, stat);
stat->blocks = lower_stat.blocks;

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