MAINTAINERS: update ceph entries

- The Ceph common code is used by both fs/ceph and drivers/block/rbd.
  Add a separate maintainers entry.

- Add Ilya as libceph maintainer and cephfs submaintainer.

- Attribute Documentation/ABI/testing/sysfs-bus-rbd to rbd.

- [email protected] should be L, not M in rbd entry.

Signed-off-by: Sage Weil <[email protected]>
Signed-off-by: Ilya Dryomov <[email protected]>
diff --git a/MAINTAINERS b/MAINTAINERS
index 8133cef..58cbc21 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2562,19 +2562,29 @@
 F:	arch/powerpc/oprofile/*cell*
 F:	arch/powerpc/platforms/cell/
 
-CEPH DISTRIBUTED FILE SYSTEM CLIENT
+CEPH COMMON CODE (LIBCEPH)
+M:	Ilya Dryomov <[email protected]>
 M:	"Yan, Zheng" <[email protected]>
 M:	Sage Weil <[email protected]>
 L:	[email protected]
 W:	http://ceph.com/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
 S:	Supported
-F:	Documentation/filesystems/ceph.txt
-F:	fs/ceph/
 F:	net/ceph/
 F:	include/linux/ceph/
 F:	include/linux/crush/
 
+CEPH DISTRIBUTED FILE SYSTEM CLIENT (CEPH)
+M:	"Yan, Zheng" <[email protected]>
+M:	Sage Weil <[email protected]>
+M:	Ilya Dryomov <[email protected]>
+L:	[email protected]
+W:	http://ceph.com/
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
+S:	Supported
+F:	Documentation/filesystems/ceph.txt
+F:	fs/ceph/
+
 CERTIFIED WIRELESS USB (WUSB) SUBSYSTEM:
 L:	[email protected]
 S:	Orphan
@@ -8366,10 +8376,11 @@
 M:	Ilya Dryomov <[email protected]>
 M:	Sage Weil <[email protected]>
 M:	Alex Elder <[email protected]>
-M:	[email protected]
+L:	[email protected]
 W:	http://ceph.com/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
 S:	Supported
+F:	Documentation/ABI/testing/sysfs-bus-rbd
 F:	drivers/block/rbd.c
 F:	drivers/block/rbd_types.h