ceph: factor out libceph from Ceph file system

This factors out protocol and low-level storage parts of ceph into a
separate libceph module living in net/ceph and include/linux/ceph.  This
is mostly a matter of moving files around.  However, a few key pieces
of the interface change as well:

 - ceph_client becomes ceph_fs_client and ceph_client, where the latter
   captures the mon and osd clients, and the fs_client gets the mds client
   and file system specific pieces.
 - Mount option parsing and debugfs setup is correspondingly broken into
   two pieces.
 - The mon client gets a generic handler callback for otherwise unknown
   messages (mds map, in this case).
 - The basic supported/required feature bits can be expanded (and are by
   ceph_fs_client).

No functional change, aside from some subtle error handling cases that got
cleaned up in the refactoring process.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 28 insertions, 0 deletions

diff --git a/net/ceph/Kconfig b/net/ceph/Kconfig
new file mode 100644
index 000000000000..ad424049b0cf
--- /dev/null
+++ b/net/ceph/Kconfig
@@ -0,0 +1,28 @@
+config CEPH_LIB
+        tristate "Ceph core library (EXPERIMENTAL)"
+        depends on INET && EXPERIMENTAL
+        select LIBCRC32C
+        select CRYPTO_AES
+        select CRYPTO
+        default n
+        help
+          Choose Y or M here to include cephlib, which provides the
+          common functionality to both the Ceph filesystem and
+          to the rados block device (rbd).
+
+          More information at http://ceph.newdream.net/.
+
+          If unsure, say N.
+
+config CEPH_LIB_PRETTYDEBUG
+        bool "Include file:line in ceph debug output"
+        depends on CEPH_LIB
+        default n
+        help
+          If you say Y here, debug output will include a filename and
+          line to aid debugging.  This increases kernel size and slows
+          execution slightly when debug call sites are enabled (e.g.,
+          via CONFIG_DYNAMIC_DEBUG).
+
+          If unsure, say N.
+