/* * 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(struct kmem_cache *cachep, void *foo) { struct gfs2_inode *ip = foo; inode_init_once(&ip->i_inode); init_rwsem(&ip->i_rw_mutex); ip->i_alloc = NULL; } static void gfs2_init_glock_once(struct kmem_cache *cachep, void *foo) { struct gfs2_glock *gl = foo; 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); 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); if (!gfs2_inode_cachep) goto fail; gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", sizeof(struct gfs2_bufdata), 0, 0, 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: gfs2_glock_exit(); 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_glock_exit(); 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);