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, 0 insertions, 65 deletions

diff --git a/fs/ceph/buffer.c b/fs/ceph/buffer.c
deleted file mode 100644
index cd39f17021d..00000000000
--- a/fs/ceph/buffer.c
+++ /dev/null
@@ -1,65 +0,0 @@
-
-#include "ceph_debug.h"
-
-#include <linux/slab.h>
-
-#include "buffer.h"
-#include "decode.h"
-
-struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
-{
-	struct ceph_buffer *b;
-
-	b = kmalloc(sizeof(*b), gfp);
-	if (!b)
-		return NULL;
-
-	b->vec.iov_base = kmalloc(len, gfp | __GFP_NOWARN);
-	if (b->vec.iov_base) {
-		b->is_vmalloc = false;
-	} else {
-		b->vec.iov_base = __vmalloc(len, gfp, PAGE_KERNEL);
-		if (!b->vec.iov_base) {
-			kfree(b);
-			return NULL;
-		}
-		b->is_vmalloc = true;
-	}
-
-	kref_init(&b->kref);
-	b->alloc_len = len;
-	b->vec.iov_len = len;
-	dout("buffer_new %p\n", b);
-	return b;
-}
-
-void ceph_buffer_release(struct kref *kref)
-{
-	struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
-
-	dout("buffer_release %p\n", b);
-	if (b->vec.iov_base) {
-		if (b->is_vmalloc)
-			vfree(b->vec.iov_base);
-		else
-			kfree(b->vec.iov_base);
-	}
-	kfree(b);
-}
-
-int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end)
-{
-	size_t len;
-
-	ceph_decode_need(p, end, sizeof(u32), bad);
-	len = ceph_decode_32(p);
-	dout("decode_buffer len %d\n", (int)len);
-	ceph_decode_need(p, end, len, bad);
-	*b = ceph_buffer_new(len, GFP_NOFS);
-	if (!*b)
-		return -ENOMEM;
-	ceph_decode_copy(p, (*b)->vec.iov_base, len);
-	return 0;
-bad:
-	return -EINVAL;
-}