diff options
Diffstat (limited to 'fs/aufs/module.c')
| -rw-r--r-- | fs/aufs/module.c | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/fs/aufs/module.c b/fs/aufs/module.c deleted file mode 100644 index 2c70dfffc..000000000 --- a/fs/aufs/module.c +++ /dev/null @@ -1,210 +0,0 @@ -/* - * Copyright (C) 2005-2015 Junjiro R. Okajima - * - * This program, aufs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/* - * module global variables and operations - */ - -#include <linux/module.h> -#include <linux/seq_file.h> -#include "aufs.h" - -void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp) -{ - if (new_sz <= nused) - return p; - - p = krealloc(p, new_sz, gfp); - if (p) - memset(p + nused, 0, new_sz - nused); - return p; -} - -/* ---------------------------------------------------------------------- */ - -/* - * aufs caches - */ -struct kmem_cache *au_cachep[AuCache_Last]; -static int __init au_cache_init(void) -{ - au_cachep[AuCache_DINFO] = AuCacheCtor(au_dinfo, au_di_init_once); - if (au_cachep[AuCache_DINFO]) - /* SLAB_DESTROY_BY_RCU */ - au_cachep[AuCache_ICNTNR] = AuCacheCtor(au_icntnr, - au_icntnr_init_once); - if (au_cachep[AuCache_ICNTNR]) - au_cachep[AuCache_FINFO] = AuCacheCtor(au_finfo, - au_fi_init_once); - if (au_cachep[AuCache_FINFO]) - au_cachep[AuCache_VDIR] = AuCache(au_vdir); - if (au_cachep[AuCache_VDIR]) - au_cachep[AuCache_DEHSTR] = AuCache(au_vdir_dehstr); - if (au_cachep[AuCache_DEHSTR]) - return 0; - - return -ENOMEM; -} - -static void au_cache_fin(void) -{ - int i; - - /* - * Make sure all delayed rcu free inodes are flushed before we - * destroy cache. - */ - rcu_barrier(); - - /* excluding AuCache_HNOTIFY */ - BUILD_BUG_ON(AuCache_HNOTIFY + 1 != AuCache_Last); - for (i = 0; i < AuCache_HNOTIFY; i++) - if (au_cachep[i]) { - kmem_cache_destroy(au_cachep[i]); - au_cachep[i] = NULL; - } -} - -/* ---------------------------------------------------------------------- */ - -int au_dir_roflags; - -#ifdef CONFIG_AUFS_SBILIST -/* - * iterate_supers_type() doesn't protect us from - * remounting (branch management) - */ -struct au_splhead au_sbilist; -#endif - -struct lock_class_key au_lc_key[AuLcKey_Last]; - -/* - * functions for module interface. - */ -MODULE_LICENSE("GPL"); -/* MODULE_LICENSE("GPL v2"); */ -MODULE_AUTHOR("Junjiro R. Okajima <aufs-users@lists.sourceforge.net>"); -MODULE_DESCRIPTION(AUFS_NAME - " -- Advanced multi layered unification filesystem"); -MODULE_VERSION(AUFS_VERSION); -MODULE_ALIAS_FS(AUFS_NAME); - -/* this module parameter has no meaning when SYSFS is disabled */ -int sysaufs_brs = 1; -MODULE_PARM_DESC(brs, "use <sysfs>/fs/aufs/si_*/brN"); -module_param_named(brs, sysaufs_brs, int, S_IRUGO); - -/* this module parameter has no meaning when USER_NS is disabled */ -static bool au_userns; -MODULE_PARM_DESC(allow_userns, "allow unprivileged to mount under userns"); -module_param_named(allow_userns, au_userns, bool, S_IRUGO); - -/* ---------------------------------------------------------------------- */ - -static char au_esc_chars[0x20 + 3]; /* 0x01-0x20, backslash, del, and NULL */ - -int au_seq_path(struct seq_file *seq, struct path *path) -{ - return seq_path(seq, path, au_esc_chars); -} - -/* ---------------------------------------------------------------------- */ - -static int __init aufs_init(void) -{ - int err, i; - char *p; - - p = au_esc_chars; - for (i = 1; i <= ' '; i++) - *p++ = i; - *p++ = '\\'; - *p++ = '\x7f'; - *p = 0; - - au_dir_roflags = au_file_roflags(O_DIRECTORY | O_LARGEFILE); - - au_sbilist_init(); - sysaufs_brs_init(); - au_debug_init(); - au_dy_init(); - err = sysaufs_init(); - if (unlikely(err)) - goto out; - err = au_procfs_init(); - if (unlikely(err)) - goto out_sysaufs; - err = au_wkq_init(); - if (unlikely(err)) - goto out_procfs; - err = au_loopback_init(); - if (unlikely(err)) - goto out_wkq; - err = au_hnotify_init(); - if (unlikely(err)) - goto out_loopback; - err = au_sysrq_init(); - if (unlikely(err)) - goto out_hin; - err = au_cache_init(); - if (unlikely(err)) - goto out_sysrq; - - aufs_fs_type.fs_flags |= au_userns ? FS_USERNS_MOUNT : 0; - err = register_filesystem(&aufs_fs_type); - if (unlikely(err)) - goto out_cache; - - /* since we define pr_fmt, call printk directly */ - printk(KERN_INFO AUFS_NAME " " AUFS_VERSION "\n"); - goto out; /* success */ - -out_cache: - au_cache_fin(); -out_sysrq: - au_sysrq_fin(); -out_hin: - au_hnotify_fin(); -out_loopback: - au_loopback_fin(); -out_wkq: - au_wkq_fin(); -out_procfs: - au_procfs_fin(); -out_sysaufs: - sysaufs_fin(); - au_dy_fin(); -out: - return err; -} - -static void __exit aufs_exit(void) -{ - unregister_filesystem(&aufs_fs_type); - au_cache_fin(); - au_sysrq_fin(); - au_hnotify_fin(); - au_loopback_fin(); - au_wkq_fin(); - au_procfs_fin(); - sysaufs_fin(); - au_dy_fin(); -} - -module_init(aufs_init); -module_exit(aufs_exit); |