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-rw-r--r--fs/gfs2/main.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
new file mode 100644
index 000000000000..21508a13bb78
--- /dev/null
+++ b/fs/gfs2/main.c
@@ -0,0 +1,150 @@
+/*
+ * 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/sched.h>
+#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, kmem_cache_t *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, kmem_cache_t *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_waiters2);
+ 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_PANIC|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;
+
+ 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)
+{
+ 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);
+