tree 6219c664f7938fa8e5e8a2efa93aab7bcc38c12f
parent 332ab16f830f59e7621ae8eb2c353dc135a316f6
author Tyler Hicks <tyhicks@linux.vnet.ibm.com> 1300218840 -0500
committer Tyler Hicks <tyhicks@linux.vnet.ibm.com> 1303775106 -0500

eCryptfs: Handle failed metadata read in lookup

When failing to read the lower file's crypto metadata during a lookup,
eCryptfs must continue on without throwing an error. For example, there
may be a plaintext file in the lower mount point that the user wants to
delete through the eCryptfs mount.

If an error is encountered while reading the metadata in lookup(), the
eCryptfs inode's size could be incorrect. We must be sure to reread the
plaintext inode size from the metadata when performing an open() or
setattr(). The metadata is already being read in those paths, so this
adds minimal performance overhead.

This patch introduces a flag which will track whether or not the
plaintext inode size has been read so that an incorrect i_size can be
fixed in the open() or setattr() paths.

https://bugs.launchpad.net/bugs/509180

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