From: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Date: Tue, 11 Jan 2011 18:43:42 +0000 (-0600)
Subject: eCryptfs: Copy up lower inode attrs in getattr
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=55f9cf6bbaa682958a7dd2755f883b768270c3ce;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

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>
---

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index eb0d267ee71..b592938a84b 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1010,6 +1010,8 @@ int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 	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));
 		generic_fillattr(dentry->d_inode, stat);
 		stat->blocks = lower_stat.blocks;
 	}