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Date: Fri, 16 May 2008 23:32:34 +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: [PATCH 20/67] aufs mount options/flags, header
From: Junjiro Okajima <hooanon05@...oo.co.jp>
initial commit
aufs mount options/flags, header
Signed-off-by: Junjiro Okajima <hooanon05@...oo.co.jp>
---
fs/aufs/opts.h | 245 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 245 insertions(+), 0 deletions(-)
diff --git a/fs/aufs/opts.h b/fs/aufs/opts.h
new file mode 100644
index 0000000..3b3ae84
--- /dev/null
+++ b/fs/aufs/opts.h
@@ -0,0 +1,245 @@
+/*
+ * 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
+ */
+
+/*
+ * mount options/flags
+ *
+ * $Id: opts.h,v 1.2 2008/04/21 01:46:26 sfjro Exp $
+ */
+
+#ifndef __AUFS_OPTS_H__
+#define __AUFS_OPTS_H__
+
+#ifdef __KERNEL__
+
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <linux/aufs_type.h>
+#include "wkq.h"
+
+/* ---------------------------------------------------------------------- */
+/* mount flags */
+
+/* external inode number bitmap and translation table */
+#define AuOpt_XINO 1
+#define AuOpt_TRUNC_XINO (1 << 1)
+#define AuOpt_LINO (1 << 2)
+#define AuOpt_UDBA_NONE (1 << 3) /* users direct branch access */
+#define AuOpt_UDBA_REVAL (1 << 4)
+#define AuOpt_UDBA_INOTIFY (1 << 5)
+#define AuOpt_SHWH (1 << 6)
+#define AuOpt_PLINK (1 << 7)
+#define AuOpt_WARN_PERM (1 << 8)
+#define AuOpt_DIRPERM1 (1 << 9)
+#define AuOpt_DLGT (1 << 10)
+#define AuOpt_COO_NONE (1 << 11) /* copyup on open */
+#define AuOpt_COO_LEAF (1 << 12)
+#define AuOpt_COO_ALL (1 << 13)
+#define AuOpt_ALWAYS_DIROPQ (1 << 14)
+#define AuOpt_REFROF (1 << 15)
+#define AuOpt_VERBOSE (1 << 16)
+#ifndef CONFIG_AUFS_HINOTIFY
+#undef AuOpt_UDBA_INOTIFY
+#define AuOpt_UDBA_INOTIFY 0
+#endif
+#ifndef CONFIG_AUFS_SHWH
+#undef AuOpt_SHWH
+#define AuOpt_SHWH 0
+#endif
+#ifndef CONFIG_AUFS_DLGT
+#undef AuOpt_DIRPERM1
+#define AuOpt_DIRPERM1 0
+#undef AuOpt_DLGT
+#define AuOpt_DLGT 0
+#endif
+
+/* policies to select one among multiple writable branches */
+enum {
+ AuWbrCreate_TDP, /* top down parent */
+ AuWbrCreate_RR, /* round robin */
+ AuWbrCreate_MFS, /* most free space */
+ AuWbrCreate_MFSV, /* mfs with seconds */
+ AuWbrCreate_MFSRR, /* mfs then rr */
+ AuWbrCreate_MFSRRV, /* mfs then rr with seconds */
+ AuWbrCreate_PMFS, /* parent and mfs */
+ AuWbrCreate_PMFSV, /* parent and mfs with seconds */
+
+ AuWbrCreate_Def = AuWbrCreate_TDP
+};
+
+enum {
+ AuWbrCopyup_TDP, /* top down parent */
+ AuWbrCopyup_BUP, /* bottom up parent */
+ AuWbrCopyup_BU, /* bottom up */
+
+ AuWbrCopyup_Def = AuWbrCopyup_TDP
+};
+
+#define AuOptMask_COO (AuOpt_COO_NONE \
+ | AuOpt_COO_LEAF \
+ | AuOpt_COO_ALL)
+#define AuOptMask_UDBA (AuOpt_UDBA_NONE \
+ | AuOpt_UDBA_REVAL \
+ | AuOpt_UDBA_INOTIFY)
+
+#ifdef CONFIG_AUFS_COMPAT
+#define AuOpt_DefExtra1 AuOpt_ALWAYS_DIROPQ
+#else
+#define AuOpt_DefExtra1 0
+#endif
+
+#define AuOpt_Def (AuOpt_XINO \
+ | AuOpt_UDBA_REVAL \
+ | AuOpt_WARN_PERM \
+ | AuOpt_COO_NONE \
+ | AuOpt_PLINK \
+ | AuOpt_DefExtra1)
+
+/* ---------------------------------------------------------------------- */
+
+struct au_opt_add {
+ aufs_bindex_t bindex;
+ char *path;
+ int perm;
+ struct nameidata nd;
+};
+
+struct au_opt_del {
+ char *path;
+ struct dentry *h_root;
+};
+
+struct au_opt_mod {
+ char *path;
+ int perm;
+ struct dentry *h_root;
+};
+
+struct au_opt_xino {
+ char *path;
+ struct file *file;
+};
+
+struct au_opt_xino_itrunc {
+ aufs_bindex_t bindex;
+};
+
+struct au_opt_xino_trunc_v {
+ u64 upper;
+ int step;
+};
+
+struct au_opt_wbr_create {
+ int wbr_create;
+ int mfs_second;
+ u64 mfsrr_watermark;
+};
+
+struct au_opt {
+ int type;
+ union {
+ struct au_opt_xino xino;
+ struct au_opt_xino_itrunc xino_itrunc;
+ struct au_opt_add add;
+ struct au_opt_del del;
+ struct au_opt_mod mod;
+ int dirwh;
+ int rdcache;
+ int deblk;
+ int nhash;
+ int udba;
+ int coo;
+ struct au_opt_wbr_create wbr_create;
+ int wbr_copyup;
+ };
+};
+
+/* opts flags */
+#define AuOpts_REMOUNT 1
+#define AuOpts_REFRESH_DIR (1 << 1)
+#define AuOpts_REFRESH_NONDIR (1 << 2)
+#define AuOpts_TRUNC_XIB (1 << 3)
+#define au_ftest_opts(flags, name) ((flags) & AuOpts_##name)
+#define au_fset_opts(flags, name) { (flags) |= AuOpts_##name; }
+#define au_fclr_opts(flags, name) { (flags) &= ~AuOpts_##name; }
+
+struct au_opts {
+ struct au_opt *opt;
+ int max_opt;
+
+ unsigned int given_udba;
+ unsigned int flags;
+};
+
+/* ---------------------------------------------------------------------- */
+
+const char *au_optstr_br_perm(int brperm);
+const char *au_optstr_udba(int udba);
+const char *au_optstr_coo(int coo);
+const char *au_optstr_wbr_copyup(int wbr_copyup);
+const char *au_optstr_wbr_create(int wbr_create);
+
+void au_opts_free(struct au_opts *opts);
+int au_opts_parse(struct super_block *sb, unsigned long flags, char *str,
+ struct au_opts *opts);
+int au_opts_mount(struct super_block *sb, struct au_opts *opts);
+int au_opts_remount(struct super_block *sb, struct au_opts *opts);
+
+/* ---------------------------------------------------------------------- */
+
+static inline unsigned int au_opt_do_test(unsigned int flags, unsigned int bit)
+{
+ AuDebugOn(bit & (AuOpt_DLGT | AuOpt_DIRPERM1));
+ return (flags & bit);
+}
+
+#define au_opt_test(flags, name) au_opt_do_test(flags, AuOpt_##name)
+
+#define au_opt_set(flags, name) do { \
+ BUILD_BUG_ON(AuOpt_##name & (AuOptMask_COO | AuOptMask_UDBA)); \
+ ((flags) |= AuOpt_##name); \
+} while (0)
+
+#define au_opt_clr(flags, name) { ((flags) &= ~AuOpt_##name); }
+
+#define au_opt_set_coo(flags, name) do { \
+ (flags) &= ~AuOptMask_COO; \
+ ((flags) |= AuOpt_##name); \
+} while(0)
+
+#define au_opt_set_udba(flags, name) do { \
+ (flags) &= ~AuOptMask_UDBA; \
+ ((flags) |= AuOpt_##name); \
+} while(0)
+
+static inline unsigned int au_opt_test_dlgt(unsigned int flags)
+{
+ if (!au_test_wkq(current))
+ return (flags & AuOpt_DLGT);
+ return 0;
+}
+
+static inline unsigned int au_opt_test_dirperm1(unsigned int flags)
+{
+ if (!au_test_wkq(current))
+ return (flags & AuOpt_DIRPERM1);
+ return 0;
+}
+
+#endif /* __KERNEL__ */
+#endif /* __AUFS_OPTS_H__ */
--
1.4.4.4
--
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