Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

fs/afs/callback.c

@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2002 Red Hat, Inc. All rights reserved.
+ *
+ * This software may be freely redistributed under the terms of the
+ * GNU General Public License.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Authors: David Woodhouse <dwmw2@cambridge.redhat.com>
+ *          David Howells <dhowells@redhat.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include "server.h"
+#include "vnode.h"
+#include "internal.h"
+
+/*****************************************************************************/
+/*
+ * allow the fileserver to request callback state (re-)initialisation
+ */
+int SRXAFSCM_InitCallBackState(struct afs_server *server)
+{
+	struct list_head callbacks;
+
+	_enter("%p", server);
+
+	INIT_LIST_HEAD(&callbacks);
+
+	/* transfer the callback list from the server to a temp holding area */
+	spin_lock(&server->cb_lock);
+
+	list_add(&callbacks, &server->cb_promises);
+	list_del_init(&server->cb_promises);
+
+	/* munch our way through the list, grabbing the inode, dropping all the
+	 * locks and regetting them in the right order
+	 */
+	while (!list_empty(&callbacks)) {
+		struct afs_vnode *vnode;
+		struct inode *inode;
+
+		vnode = list_entry(callbacks.next, struct afs_vnode, cb_link);
+		list_del_init(&vnode->cb_link);
+
+		/* try and grab the inode - may fail */
+		inode = igrab(AFS_VNODE_TO_I(vnode));
+		if (inode) {
+			int release = 0;
+
+			spin_unlock(&server->cb_lock);
+			spin_lock(&vnode->lock);
+
+			if (vnode->cb_server == server) {
+				vnode->cb_server = NULL;
+				afs_kafstimod_del_timer(&vnode->cb_timeout);
+				spin_lock(&afs_cb_hash_lock);
+				list_del_init(&vnode->cb_hash_link);
+				spin_unlock(&afs_cb_hash_lock);
+				release = 1;
+			}
+
+			spin_unlock(&vnode->lock);
+
+			iput(inode);
+			afs_put_server(server);
+
+			spin_lock(&server->cb_lock);
+		}
+	}
+
+	spin_unlock(&server->cb_lock);
+
+	_leave(" = 0");
+	return 0;
+} /* end SRXAFSCM_InitCallBackState() */
+
+/*****************************************************************************/
+/*
+ * allow the fileserver to break callback promises
+ */
+int SRXAFSCM_CallBack(struct afs_server *server, size_t count,
+		      struct afs_callback callbacks[])
+{
+	_enter("%p,%u,", server, count);
+
+	for (; count > 0; callbacks++, count--) {
+		struct afs_vnode *vnode = NULL;
+		struct inode *inode = NULL;
+		int valid = 0;
+
+		_debug("- Fid { vl=%08x n=%u u=%u }  CB { v=%u x=%u t=%u }",
+		       callbacks->fid.vid,
+		       callbacks->fid.vnode,
+		       callbacks->fid.unique,
+		       callbacks->version,
+		       callbacks->expiry,
+		       callbacks->type
+		       );
+
+		/* find the inode for this fid */
+		spin_lock(&afs_cb_hash_lock);
+
+		list_for_each_entry(vnode,
+				    &afs_cb_hash(server, &callbacks->fid),
+				    cb_hash_link) {
+			if (memcmp(&vnode->fid, &callbacks->fid,
+				   sizeof(struct afs_fid)) != 0)
+				continue;
+
+			/* right vnode, but is it same server? */
+			if (vnode->cb_server != server)
+				break; /* no */
+
+			/* try and nail the inode down */
+			inode = igrab(AFS_VNODE_TO_I(vnode));
+			break;
+		}
+
+		spin_unlock(&afs_cb_hash_lock);
+
+		if (inode) {
+			/* we've found the record for this vnode */
+			spin_lock(&vnode->lock);
+			if (vnode->cb_server == server) {
+				/* the callback _is_ on the calling server */
+				vnode->cb_server = NULL;
+				valid = 1;
+
+				afs_kafstimod_del_timer(&vnode->cb_timeout);
+				vnode->flags |= AFS_VNODE_CHANGED;
+
+				spin_lock(&server->cb_lock);
+				list_del_init(&vnode->cb_link);
+				spin_unlock(&server->cb_lock);
+
+				spin_lock(&afs_cb_hash_lock);
+				list_del_init(&vnode->cb_hash_link);
+				spin_unlock(&afs_cb_hash_lock);
+			}
+			spin_unlock(&vnode->lock);
+
+			if (valid) {
+				invalidate_remote_inode(inode);
+				afs_put_server(server);
+			}
+			iput(inode);
+		}
+	}
+
+	_leave(" = 0");
+	return 0;
+} /* end SRXAFSCM_CallBack() */
+
+/*****************************************************************************/
+/*
+ * allow the fileserver to see if the cache manager is still alive
+ */
+int SRXAFSCM_Probe(struct afs_server *server)
+{
+	_debug("SRXAFSCM_Probe(%p)\n", server);
+	return 0;
+} /* end SRXAFSCM_Probe() */