This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / fs / gfs2 / main.c

diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
new file mode 100644 (file)
index 0000000..c4bb374
--- /dev/null
+++ b/fs/gfs2/main.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License version 2.
+ */
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gfs2_ondisk.h>
+#include <linux/lm_interface.h>
+#include <asm/atomic.h>
+
+#include "gfs2.h"
+#include "incore.h"
+#include "ops_fstype.h"
+#include "sys.h"
+#include "util.h"
+#include "glock.h"
+
+static void gfs2_init_inode_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
+{
+       struct gfs2_inode *ip = foo;
+       if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+           SLAB_CTOR_CONSTRUCTOR) {
+               inode_init_once(&ip->i_inode);
+               spin_lock_init(&ip->i_spin);
+               init_rwsem(&ip->i_rw_mutex);
+               memset(ip->i_cache, 0, sizeof(ip->i_cache));
+       }
+}
+
+static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
+{
+       struct gfs2_glock *gl = foo;
+       if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+           SLAB_CTOR_CONSTRUCTOR) {
+               INIT_HLIST_NODE(&gl->gl_list);
+               spin_lock_init(&gl->gl_spin);
+               INIT_LIST_HEAD(&gl->gl_holders);
+               INIT_LIST_HEAD(&gl->gl_waiters1);
+               INIT_LIST_HEAD(&gl->gl_waiters3);
+               gl->gl_lvb = NULL;
+               atomic_set(&gl->gl_lvb_count, 0);
+               INIT_LIST_HEAD(&gl->gl_reclaim);
+               INIT_LIST_HEAD(&gl->gl_ail_list);
+               atomic_set(&gl->gl_ail_count, 0);
+       }
+}
+
+/**
+ * init_gfs2_fs - Register GFS2 as a filesystem
+ *
+ * Returns: 0 on success, error code on failure
+ */
+
+static int __init init_gfs2_fs(void)
+{
+       int error;
+
+       error = gfs2_sys_init();
+       if (error)
+               return error;
+
+       error = gfs2_glock_init();
+       if (error)
+               goto fail;
+
+       error = -ENOMEM;
+       gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
+                                             sizeof(struct gfs2_glock),
+                                             0, 0,
+                                             gfs2_init_glock_once, NULL);
+       if (!gfs2_glock_cachep)
+               goto fail;
+
+       gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
+                                             sizeof(struct gfs2_inode),
+                                             0,  SLAB_RECLAIM_ACCOUNT|
+                                                 SLAB_MEM_SPREAD,
+                                             gfs2_init_inode_once, NULL);
+       if (!gfs2_inode_cachep)
+               goto fail;
+
+       gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
+                                               sizeof(struct gfs2_bufdata),
+                                               0, 0, NULL, NULL);
+       if (!gfs2_bufdata_cachep)
+               goto fail;
+
+       error = register_filesystem(&gfs2_fs_type);
+       if (error)
+               goto fail;
+
+       error = register_filesystem(&gfs2meta_fs_type);
+       if (error)
+               goto fail_unregister;
+
+       gfs2_register_debugfs();
+
+       printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__);
+
+       return 0;
+
+fail_unregister:
+       unregister_filesystem(&gfs2_fs_type);
+fail:
+       if (gfs2_bufdata_cachep)
+               kmem_cache_destroy(gfs2_bufdata_cachep);
+
+       if (gfs2_inode_cachep)
+               kmem_cache_destroy(gfs2_inode_cachep);
+
+       if (gfs2_glock_cachep)
+               kmem_cache_destroy(gfs2_glock_cachep);
+
+       gfs2_sys_uninit();
+       return error;
+}
+
+/**
+ * exit_gfs2_fs - Unregister the file system
+ *
+ */
+
+static void __exit exit_gfs2_fs(void)
+{
+       gfs2_unregister_debugfs();
+       unregister_filesystem(&gfs2_fs_type);
+       unregister_filesystem(&gfs2meta_fs_type);
+
+       kmem_cache_destroy(gfs2_bufdata_cachep);
+       kmem_cache_destroy(gfs2_inode_cachep);
+       kmem_cache_destroy(gfs2_glock_cachep);
+
+       gfs2_sys_uninit();
+}
+
+MODULE_DESCRIPTION("Global File System");
+MODULE_AUTHOR("Red Hat, Inc.");
+MODULE_LICENSE("GPL");
+
+module_init(init_gfs2_fs);
+module_exit(exit_gfs2_fs);
+