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Message-Id: <1211340189-11813-5-git-send-email-hooanon05@yahoo.co.jp>
Date: Wed, 21 May 2008 12:22:34 +0900
From: hooanon05@...oo.co.jp
To: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Junjiro Okajima <hooanon05@...oo.co.jp>
Subject: [AUFS PATCH v2.6.26-rc2-mm1 04/39] aufs module global
From: Junjiro Okajima <hooanon05@...oo.co.jp>
initial commit
main header file
module initialization and module global vars
Signed-off-by: Junjiro Okajima <hooanon05@...oo.co.jp>
---
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
--
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