FUSE filesystem support.

This implements FUSE filesystem support so that any libguestfs-
accessible disk image can be mounted as a local filesystem.

Note: file writes (ie. write(2) system call) is not yet implemented.

The API needs more test coverage, particularly lesser-used system
calls.

The big unresolved issue is UID/GID mapping between guest filesystem
IDs and the host.  It's not easy to automate this because you need
extra details about the guest itself in order to get to its
UID->username map (eg. /etc/passwd from the guest).

1 files changed, 9 insertions, 26 deletions

diff --git a/TODO b/TODO
index fc14cdc8..9c095574 100644
--- a/TODO
+++ b/TODO
@@ -12,33 +12,16 @@ Python bindings
 Ideas for the Python bindings:
 https://www.redhat.com/archives/fedora-virt/2009-April/msg00114.html
 
-FTP server or FUSE?
--------------------
+FUSE API
+--------
+
+The API needs more test coverage, particularly lesser-used system
+calls.
 
-Originally we had intended to implement an NFS server inside the
-appliance, which would allow the guest filesystems to be mounted on
-the host, and large changes to be made.  We eventually rejected the
-idea of using NFS, partly because it requires root to mount
-filesystems in the host, and partly because of problems handling UID
-mappings between host and guest filesystem.
-
-Then we look at implementing an FTP server instead.  FTP clients are
-widely available for many languages, don't require root, and don't
-have any UID mapping problems.  However there is the problem of
-getting the TCP connection into the guest, and that FTP requires a
-secondary data connection either in or out of the guest (the NFS
-situation is even more dire).
-
-Thirdly we looked at implementing a FUSE-based filesystem.  This is
-plausible - it could be implemented just by adding the additional FUSE
-operations to the standard guestfs(3) API, and then implementing a
-simple FUSE daemon.  (The FUSE website has some very helpful
-documentation and examples).  I [RWMJ] am not particularly convinced
-that a FUSE-based filesystem would really be useful to anyone, but am
-prepared to accept patches if someone does all the work.
-
-See also the mountlo project:
-http://sourceforge.net/project/showfiles.php?group_id=121684&package_id=150116
+The big unresolved issue is UID/GID mapping between guest filesystem
+IDs and the host.  It's not easy to automate this because you need
+extra details about the guest itself in order to get to its
+UID->username map (eg. /etc/passwd from the guest).
 
 BufferIn
 --------