/* * 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 #include #include #include #include #include #include #include #include #include #include #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); es and targets that maintain kernel data store this at the tail of their private structure. Extend xt_match and xt_target with .usersize to limit how many bytes of data are copied. The remainder is cleared. If compatsize is specified, usersize can only safely be used if all fields up to usersize use platform-independent types. Otherwise, the compat_to_user callback must be defined. This patch does not yet enable the support logic. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/target')