From: Junjiro Okajima <hooanon05@xxxxxxxxxxx> initial commit main header file module initialization and module global vars Signed-off-by: Junjiro Okajima <hooanon05@xxxxxxxxxxx> --- fs/aufs/aufs.h | 52 ++++++++++++++++++ fs/aufs/module.c | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/aufs/module.h | 72 +++++++++++++++++++++++++ 3 files changed, 277 insertions(+), 0 deletions(-) create mode 100644 fs/aufs/aufs.h create mode 100644 fs/aufs/module.c create mode 100644 fs/aufs/module.h diff --git a/fs/aufs/aufs.h b/fs/aufs/aufs.h new file mode 100644 index 0000000..fbca615 --- /dev/null +++ b/fs/aufs/aufs.h @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2005-2008 Junjiro 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, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * main header files + */ + +#ifndef __AUFS_H__ +#define __AUFS_H__ + +#ifdef __KERNEL__ + +#include <linux/version.h> + +#include "debug.h" + +#include "branch.h" +#include "cpup.h" +#include "dcsub.h" +#include "dentry.h" +#include "dir.h" +#include "file.h" +#include "hinode.h" +#include "inode.h" +#include "misc.h" +#include "module.h" +#include "opts.h" +#include "super.h" +#include "sysaufs.h" +#include "vfsub.h" +#include "whout.h" +#include "wkq.h" +/* reserved for future use */ +/* #include "xattr.h" */ + +#endif /* __KERNEL__ */ +#endif /* __AUFS_H__ */ diff --git a/fs/aufs/module.c b/fs/aufs/module.c new file mode 100644 index 0000000..f5464f7 --- /dev/null +++ b/fs/aufs/module.c @@ -0,0 +1,153 @@ +/* + * Copyright (C) 2007 Junjiro 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, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * module global variables and operations + */ + +#include <linux/module.h> +#include "aufs.h" + +/* ---------------------------------------------------------------------- */ + +/* + * aufs caches + */ +struct kmem_cache *au_cachep[AuCache_Last]; +static int __init create_cache(void) +{ + au_cachep[AuCache_DINFO] = AuCache(au_dinfo); + if (au_cachep[AuCache_DINFO]) + au_cachep[AuCache_ICNTNR] = AuCache(aufs_icntnr); + if (au_cachep[AuCache_ICNTNR]) + au_cachep[AuCache_FINFO] = AuCache(au_finfo); + 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 destroy_cache(void) +{ + int i; + for (i = 0; i < AuCache_Last; i++) + if (au_cachep[i]) { + kmem_cache_destroy(au_cachep[i]); + au_cachep[i] = NULL; + } +} + +/* ---------------------------------------------------------------------- */ + +char au_esc_chars[0x20 + 3]; /* 0x01-0x20, backslash, del, and NULL */ +int au_dir_roflags; + +/* + * functions for module interface. + */ +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Junjiro Okajima"); +MODULE_DESCRIPTION(AUFS_NAME " -- Another unionfs"); +MODULE_VERSION(AUFS_VERSION); + +/* it should be 'byte', but param_set_byte() prints it by "%c" */ +short aufs_nwkq = AUFS_NWKQ_DEF; +MODULE_PARM_DESC(nwkq, "the number of workqueue thread, " AUFS_WKQ_NAME); +module_param_named(nwkq, aufs_nwkq, short, S_IRUGO); + +int sysaufs_brs; +MODULE_PARM_DESC(brs, "use <sysfs>/fs/aufs/si_*/brN"); +module_param_named(brs, sysaufs_brs, int, S_IRUGO); + +/* ---------------------------------------------------------------------- */ + +static int __init aufs_init(void) +{ + int err, i; + char *p; + + au_debug_init(); + + 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); + + err = -EINVAL; + if (unlikely(aufs_nwkq <= 0)) + goto out; + + err = sysaufs_init(); + if (unlikely(err)) + goto out; + err = au_wkq_init(); + if (unlikely(err)) + goto out_sysaufs; + err = au_inotify_init(); + if (unlikely(err)) + goto out_wkq; + err = au_sysrq_init(); + if (unlikely(err)) + goto out_inotify; + + err = create_cache(); + if (unlikely(err)) + goto out_sysrq; + + err = register_filesystem(&aufs_fs_type); + if (unlikely(err)) + goto out_cache; + pr_info(AUFS_NAME " " AUFS_VERSION "\n"); + return 0; /* success */ + + out_cache: + destroy_cache(); + out_sysrq: + au_sysrq_fin(); + out_inotify: + au_inotify_fin(); + out_wkq: + au_wkq_fin(); + out_sysaufs: + sysaufs_fin(); + out: + AuTraceErr(err); + return err; +} + +static void __exit aufs_exit(void) +{ + unregister_filesystem(&aufs_fs_type); + destroy_cache(); + + au_sysrq_fin(); + au_inotify_fin(); + au_wkq_fin(); + sysaufs_fin(); +} + +module_init(aufs_init); +module_exit(aufs_exit); diff --git a/fs/aufs/module.h b/fs/aufs/module.h new file mode 100644 index 0000000..fad7472 --- /dev/null +++ b/fs/aufs/module.h @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2007-2008 Junjiro 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, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * module initialization and module-global + */ + +#ifndef __AUFS_MODULE_H__ +#define __AUFS_MODULE_H__ + +#ifdef __KERNEL__ + +/* module parameters */ +extern short aufs_nwkq; +extern int sysaufs_brs; + +/* ---------------------------------------------------------------------- */ + +extern char au_esc_chars[]; +extern int au_dir_roflags; + +/* kmem cache */ +enum { + AuCache_DINFO, + AuCache_ICNTNR, + AuCache_FINFO, + AuCache_VDIR, + AuCache_DEHSTR, +#ifdef CONFIG_AUFS_HINOTIFY + AuCache_HINOTIFY, +#endif + AuCache_Last +}; + +extern struct kmem_cache *au_cachep[]; + +#define AuCacheArgs(type, sz) (type), (sz), 0, SLAB_RECLAIM_ACCOUNT, NULL +#define AuCacheX(type, extra) \ + kmem_cache_create(AuCacheArgs(#type, sizeof(struct type) + extra)) +#define AuCache(type) AuCacheX(type, 0) + +/* ---------------------------------------------------------------------- */ + +#define AuCacheFuncs(name, index) \ +static inline void *au_cache_alloc_##name(void) \ +{ return kmem_cache_alloc(au_cachep[index], GFP_KERNEL); } \ +static inline void au_cache_free_##name(void *p) \ +{ kmem_cache_free(au_cachep[index], p); } + +AuCacheFuncs(dinfo, AuCache_DINFO); +AuCacheFuncs(icntnr, AuCache_ICNTNR); +AuCacheFuncs(finfo, AuCache_FINFO); +AuCacheFuncs(vdir, AuCache_VDIR); +AuCacheFuncs(dehstr, AuCache_DEHSTR); + +#endif /* __KERNEL__ */ +#endif /* __AUFS_MODULE_H__ */ -- 1.5.5.1.308.g1fbb5.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html