LU-2158 lvfs: remove the fsfilt and lvfs layer

[fs/lustre-release.git] / lustre / lvfs / fsfilt.c

diff --git a/lustre/lvfs/fsfilt.c b/lustre/lvfs/fsfilt.c
deleted file mode 100644 (file)
index d5fe34b..0000000
--- a/lustre/lvfs/fsfilt.c
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- */
-
-#define DEBUG_SUBSYSTEM S_FILTER
-
-#include <linux/fs.h>
-#include <linux/jbd.h>
-#include <linux/module.h>
-#include <linux/kmod.h>
-#include <linux/slab.h>
-#include <libcfs/libcfs.h>
-#include <lustre_fsfilt.h>
-
-CFS_LIST_HEAD(fsfilt_types);
-
-static struct fsfilt_operations *fsfilt_search_type(const char *type)
-{
-        struct fsfilt_operations *found;
-        cfs_list_t *p;
-
-        cfs_list_for_each(p, &fsfilt_types) {
-                found = cfs_list_entry(p, struct fsfilt_operations, fs_list);
-                if (!strcmp(found->fs_type, type)) {
-                        return found;
-                }
-        }
-        return NULL;
-}
-
-int fsfilt_register_ops(struct fsfilt_operations *fs_ops)
-{
-        struct fsfilt_operations *found;
-
-        /* lock fsfilt_types list */
-        if ((found = fsfilt_search_type(fs_ops->fs_type))) {
-                if (found != fs_ops) {
-                        CERROR("different operations for type %s\n",
-                               fs_ops->fs_type);
-                        /* unlock fsfilt_types list */
-                        RETURN(-EEXIST);
-                }
-       } else {
-               try_module_get(THIS_MODULE);
-               cfs_list_add(&fs_ops->fs_list, &fsfilt_types);
-       }
-
-        /* unlock fsfilt_types list */
-        return 0;
-}
-EXPORT_SYMBOL(fsfilt_register_ops);
-
-void fsfilt_unregister_ops(struct fsfilt_operations *fs_ops)
-{
-        cfs_list_t *p;
-
-        /* lock fsfilt_types list */
-        cfs_list_for_each(p, &fsfilt_types) {
-                struct fsfilt_operations *found;
-
-               found = cfs_list_entry(p, typeof(*found), fs_list);
-               if (found == fs_ops) {
-                       cfs_list_del(p);
-                       module_put(THIS_MODULE);
-                       break;
-               }
-        }
-        /* unlock fsfilt_types list */
-}
-EXPORT_SYMBOL(fsfilt_unregister_ops);
-
-struct fsfilt_operations *fsfilt_get_ops(const char *type)
-{
-       struct fsfilt_operations *fs_ops;
-
-       /* lock fsfilt_types list */
-       if (!(fs_ops = fsfilt_search_type(type))) {
-               char name[32];
-               int rc;
-
-               snprintf(name, sizeof(name) - 1, "fsfilt_%s", type);
-               name[sizeof(name) - 1] = '\0';
-
-               if (!(rc = request_module("%s", name))) {
-                       fs_ops = fsfilt_search_type(type);
-                       CDEBUG(D_INFO, "Loaded module '%s'\n", name);
-                       if (!fs_ops)
-                               rc = -ENOENT;
-               }
-
-               if (rc) {
-                       CERROR("Can't find %s interface\n", name);
-                       RETURN(ERR_PTR(rc < 0 ? rc : -rc));
-                       /* unlock fsfilt_types list */
-               }
-       }
-       try_module_get(fs_ops->fs_owner);
-       /* unlock fsfilt_types list */
-
-       return fs_ops;
-}
-EXPORT_SYMBOL(fsfilt_get_ops);
-
-void fsfilt_put_ops(struct fsfilt_operations *fs_ops)
-{
-       module_put(fs_ops->fs_owner);
-}
-EXPORT_SYMBOL(fsfilt_put_ops);