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[PATCH 0/11] eCryptfs: Introduce persistent lower files for each eCryptfs inode

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From: Michael Halcrow <mhalcrow@...>
To: <akpm@...>
Cc: <linux-kernel@...>, <linux-fsdevel@...>, <ecryptfs-devel@...>, <mhalcrow@...>
Subject: [PATCH 0/11] eCryptfs: Introduce persistent lower files for each eCryptfs inode
Date: Monday, September 17, 2007 - 5:44 pm

Currently, eCryptfs directly accesses the lower inode address space,
doing things like grab_cache_page() on lower_inode->i_mapping. It
really should not do that. The main point of this patch set is to make
all I/O with the lower files go through vfs_read() and vfs_write()
instead.

In order to accomplish this, eCryptfs needs a way to call vfs_read()
and vfs_write() on the lower file when ecryptfs_aops->readpage() and
ecryptfs_aops->writepage() are called. I propose keeping a persistent
lower file around for each eCryptfs inode. This is the only lower file
that eCryptfs will open for any given eCryptfs inode; multiple
eCryptfs files may map to this one persistent lower file. When the
eCrypfs inode is destroyed, this persistent lower file is closed.

Consolidating all reads and writes to the lower file to a single
execution path simplifies the code. This should also make it easier to
port eCryptfs to use the asynchronous crypto API functions. Note that
this patch set also removes all direct calls to lower prepare_write()
and commite_write(), fixing an oops when mounted on NFS.

Mike
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Messages in current thread:
[PATCH 0/11] eCryptfs: Introduce persistent lower files for ..., Michael Halcrow, (Mon Sep 17, 5:44 pm)
[PATCH 9/11] eCryptfs: Initialize persistent lower file on i..., Michael Halcrow, (Mon Sep 17, 5:50 pm)
[PATCH 10/11] eCryptfs: Remove unused functions and kmem_cache, Michael Halcrow, (Mon Sep 17, 5:51 pm)
[PATCH 11/11] eCryptfs: Replace magic numbers, Michael Halcrow, (Mon Sep 17, 5:52 pm)
[PATCH 8/11] eCryptfs: Convert mmap functions to use persist..., Michael Halcrow, (Mon Sep 17, 5:50 pm)
Re: [PATCH 8/11] eCryptfs: Convert mmap functions to use per..., Andrew Morton, (Thu Sep 20, 1:50 am)
Re: [PATCH 8/11] eCryptfs: Convert mmap functions to use per..., Michael Halcrow, (Thu Sep 20, 6:03 pm)
[PATCH 7/11] eCryptfs: Make open, truncate, and setattr use ..., Michael Halcrow, (Mon Sep 17, 5:49 pm)
[PATCH 4/11] eCryptfs: Replace encrypt, decrypt, and inode s..., Michael Halcrow, (Mon Sep 17, 5:47 pm)
Re: [PATCH 4/11] eCryptfs: Replace encrypt, decrypt, and ino..., Andrew Morton, (Thu Sep 20, 1:46 am)
Re: [PATCH 4/11] eCryptfs: Replace encrypt, decrypt, and ino..., Michael Halcrow, (Thu Sep 20, 5:44 pm)
Re: [PATCH 4/11] eCryptfs: Replace encrypt, decrypt, and ino..., Erez Zadok, (Thu Sep 20, 7:35 pm)
[PATCH 6/11] eCryptfs: Update metadata read/write functions, Michael Halcrow, (Mon Sep 17, 5:48 pm)
Re: [PATCH 6/11] eCryptfs: Update metadata read/write functi..., Andrew Morton, (Thu Sep 20, 1:48 am)
Re: [PATCH 6/11] eCryptfs: Update metadata read/write functi..., Michael Halcrow, (Mon Sep 24, 6:40 pm)
[PATCH 2/11] eCryptfs: Remove assignments in if-statements, Michael Halcrow, (Mon Sep 17, 5:45 pm)
[PATCH 3/11] eCryptfs: read_write.c routines, Michael Halcrow, (Mon Sep 17, 5:46 pm)
Re: [PATCH 3/11] eCryptfs: read_write.c routines, Andrew Morton, (Thu Sep 20, 1:38 am)
Re: [PATCH 3/11] eCryptfs: read_write.c routines, Michael Halcrow, (Mon Sep 24, 6:12 pm)
Re: [Ecryptfs-devel] [PATCH 3/11] eCryptfs: read_write.c rou..., Michael Halcrow, (Fri Sep 21, 5:51 pm)
Re: [Ecryptfs-devel] [PATCH 3/11] eCryptfs: read_write.c rou..., Andrew Morton, (Fri Sep 21, 6:05 pm)
Re: [Ecryptfs-devel] [PATCH 3/11] eCryptfs: read_write.c rou..., Michael Halcrow, (Tue Sep 25, 11:56 am)
Re: [PATCH 3/11] eCryptfs: read_write.c routines, Andrew Morton, (Thu Sep 20, 1:25 am)
[PATCH 5/11] eCryptfs: Set up and destroy persistent lower f..., Michael Halcrow, (Mon Sep 17, 5:47 pm)
[PATCH 1/11] eCryptfs: Remove header_extent_size, Michael Halcrow, (Mon Sep 17, 5:45 pm)