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: NTyler Hicks <tyhicks@linux.vnet.ibm.com>
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