/* * 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. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #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/rcupdate.h> #include <linux/rculist_bl.h> #include <linux/atomic.h> #include <linux/mempool.h> #include "gfs2.h" #include "incore.h" #include "super.h" #include "sys.h" #include "util.h" #include "glock.h" #include "quota.h" #include "recovery.h" #include "dir.h" #include "glops.h" struct workqueue_struct *gfs2_control_wq; static void gfs2_init_inode_once(void *foo) { struct gfs2_inode *ip = foo; inode_init_once(&ip->i_inode); init_rwsem(&ip->i_rw_mutex); INIT_LIST_HEAD(&ip->i_trunc_list); ip->i_qadata = NULL; memset(&ip->i_res, 0, sizeof(ip->i_res)); RB_CLEAR_NODE(&ip->i_res.rs_node); ip->i_hash_cache = NULL; gfs2_holder_mark_uninitialized(&ip->i_iopen_gh); } static void gfs2_init_glock_once(void *foo) { struct gfs2_glock *gl = foo; INIT_HLIST_BL_NODE(&gl->gl_list); spin_lock_init(&gl->gl_lockref.lock); INIT_LIST_HEAD(&gl->gl_holders); INIT_LIST_HEAD(&gl->gl_lru); INIT_LIST_HEAD(&gl->gl_ail_list); atomic_set(&gl->gl_ail_count, 0); atomic_set(&gl->gl_revokes, 0); } static void gfs2_init_gl_aspace_once(void *foo) { struct gfs2_glock *gl = foo; struct address_space *mapping = (struct address_space *)(gl + 1); gfs2_init_glock_once(gl); address_space_init_once(mapping); } /** * 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; gfs2_str2qstr(&gfs2_qdot, "."); gfs2_str2qstr(&gfs2_qdotdot, ".."); gfs2_quota_hash_init(); error = gfs2_sys_init(); if (error) return error; error = list_lru_init(&gfs2_qd_lru); if (error) goto fail_lru; 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_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)", sizeof(struct gfs2_glock) + sizeof(struct address_space), 0, 0, gfs2_init_gl_aspace_once); if (!gfs2_glock_aspace_cachep) goto fail; gfs2_inode_cachep = kmem_cache_create("gfs2_inode", sizeof(struct gfs2_inode), 0, SLAB_RECLAIM_ACCOUNT| SLAB_MEM_SPREAD| SLAB_ACCOUNT, 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; gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd", sizeof(struct gfs2_rgrpd), 0, 0, NULL); if (!gfs2_rgrpd_cachep) goto fail; gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad", sizeof(struct gfs2_quota_data), 0, 0, NULL); if (!gfs2_quotad_cachep) goto fail; gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata", sizeof(struct gfs2_qadata), 0, 0, NULL); if (!gfs2_qadata_cachep) goto fail; error = register_shrinker(&gfs2_qd_shrinker); if (error) goto fail; error = register_filesystem(&gfs2_fs_type); if (error) goto fail; error = register_filesystem(&gfs2meta_fs_type); if (error) goto fail_unregister; error = -ENOMEM; gfs_recovery_wq = alloc_workqueue("gfs_recovery", WQ_MEM_RECLAIM | WQ_FREEZABLE, 0); if (!gfs_recovery_wq) goto fail_wq; gfs2_control_wq = alloc_workqueue("gfs2_control", WQ_UNBOUND | WQ_FREEZABLE, 0); if (!gfs2_control_wq) goto fail_recovery; gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0); if (!gfs2_freeze_wq) goto fail_control; gfs2_page_pool = mempool_create_page_pool(64, 0); if (!gfs2_page_pool) goto fail_freeze; gfs2_register_debugfs(); pr_info("GFS2 installed\n"); return 0; fail_freeze: destroy_workqueue(gfs2_freeze_wq); fail_control: destroy_workqueue(gfs2_control_wq); fail_recovery: destroy_workqueue(gfs_recovery_wq); fail_wq: unregister_filesystem(&gfs2meta_fs_type); fail_unregister: unregister_filesystem(&gfs2_fs_type); fail: list_lru_destroy(&gfs2_qd_lru); fail_lru: unregister_shrinker(&gfs2_qd_shrinker); gfs2_glock_exit(); if (gfs2_qadata_cachep) kmem_cache_destroy(gfs2_qadata_cachep); if (gfs2_quotad_cachep) kmem_cache_destroy(gfs2_quotad_cachep); if (gfs2_rgrpd_cachep) kmem_cache_destroy(gfs2_rgrpd_cachep); if (gfs2_bufdata_cachep) kmem_cache_destroy(gfs2_bufdata_cachep); if (gfs2_inode_cachep) kmem_cache_destroy(gfs2_inode_cachep); if (gfs2_glock_aspace_cachep) kmem_cache_destroy(gfs2_glock_aspace_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_shrinker(&gfs2_qd_shrinker); gfs2_glock_exit(); gfs2_unregister_debugfs(); unregister_filesystem(&gfs2_fs_type); unregister_filesystem(&gfs2meta_fs_type); destroy_workqueue(gfs_recovery_wq); destroy_workqueue(gfs2_control_wq); destroy_workqueue(gfs2_freeze_wq); list_lru_destroy(&gfs2_qd_lru); rcu_barrier(); mempool_destroy(gfs2_page_pool); kmem_cache_destroy(gfs2_qadata_cachep); kmem_cache_destroy(gfs2_quotad_cachep); kmem_cache_destroy(gfs2_rgrpd_cachep); kmem_cache_destroy(gfs2_bufdata_cachep); kmem_cache_destroy(gfs2_inode_cachep); kmem_cache_destroy(gfs2_glock_aspace_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);