1 files changed, 313 insertions, 0 deletions
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
new file mode 100644
index 000000000000..3d0c18a16db1
--- /dev/null
+++ b/fs/nilfs2/nilfs.h
@@ -0,0 +1,313 @@
+/*
+ * nilfs.h - NILFS local header file.
+ *
+ * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
+ *
+ * This program 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
+ *
+ * Written by Koji Sato <koji@osrg.net>
+ *            Ryusuke Konishi <ryusuke@osrg.net>
+ */
+
+#ifndef _NILFS_H
+#define _NILFS_H
+
+#include <linux/kernel.h>
+#include <linux/buffer_head.h>
+#include <linux/spinlock.h>
+#include <linux/blkdev.h>
+#include <linux/nilfs2_fs.h>
+#include "the_nilfs.h"
+#include "sb.h"
+#include "bmap.h"
+#include "bmap_union.h"
+
+/*
+ * nilfs inode data in memory
+ */
+struct nilfs_inode_info {
+	__u32 i_flags;
+	unsigned long  i_state;		/* Dynamic state flags */
+	struct nilfs_bmap *i_bmap;
+	union nilfs_bmap_union i_bmap_union;
+	__u64 i_xattr;	/* sector_t ??? */
+	__u32 i_dir_start_lookup;
+	__u64 i_cno;		/* check point number for GC inode */
+	struct address_space i_btnode_cache;
+	struct list_head i_dirty;	/* List for connecting dirty files */
+
+#ifdef CONFIG_NILFS_XATTR
+	/*
+	 * Extended attributes can be read independently of the main file
+	 * data. Taking i_sem even when reading would cause contention
+	 * between readers of EAs and writers of regular file data, so
+	 * instead we synchronize on xattr_sem when reading or changing
+	 * EAs.
+	 */
+	struct rw_semaphore xattr_sem;
+#endif
+#ifdef CONFIG_NILFS_POSIX_ACL
+	struct posix_acl *i_acl;
+	struct posix_acl *i_default_acl;
+#endif
+	struct buffer_head *i_bh;	/* i_bh contains a new or dirty
+					   disk inode */
+	struct inode vfs_inode;
+};
+
+static inline struct nilfs_inode_info *NILFS_I(const struct inode *inode)
+{
+	return container_of(inode, struct nilfs_inode_info, vfs_inode);
+}
+
+static inline struct nilfs_inode_info *
+NILFS_BMAP_I(const struct nilfs_bmap *bmap)
+{
+	return container_of((union nilfs_bmap_union *)bmap,
+			    struct nilfs_inode_info,
+			    i_bmap_union);
+}
+
+static inline struct inode *NILFS_BTNC_I(struct address_space *btnc)
+{
+	struct nilfs_inode_info *ii =
+		container_of(btnc, struct nilfs_inode_info, i_btnode_cache);
+	return &ii->vfs_inode;
+}
+
+static inline struct inode *NILFS_AS_I(struct address_space *mapping)
+{
+	return (mapping->host) ? :
+		container_of(mapping, struct inode, i_data);
+}
+
+/*
+ * Dynamic state flags of NILFS on-memory inode (i_state)
+ */
+enum {
+	NILFS_I_NEW = 0,		/* Inode is newly created */
+	NILFS_I_DIRTY,			/* The file is dirty */
+	NILFS_I_QUEUED,			/* inode is in dirty_files list */
+	NILFS_I_BUSY,			/* inode is grabbed by a segment
+					   constructor */
+	NILFS_I_COLLECTED,		/* All dirty blocks are collected */
+	NILFS_I_UPDATED,		/* The file has been written back */
+	NILFS_I_INODE_DIRTY,		/* write_inode is requested */
+	NILFS_I_BMAP,			/* has bmap and btnode_cache */
+	NILFS_I_GCINODE,		/* inode for GC, on memory only */
+	NILFS_I_GCDAT,			/* shadow DAT, on memory only */
+};
+
+/*
+ * Macros to check inode numbers
+ */
+#define NILFS_MDT_INO_BITS   \
+  ((unsigned int)(1 << NILFS_DAT_INO | 1 << NILFS_CPFILE_INO |		\
+		  1 << NILFS_SUFILE_INO | 1 << NILFS_IFILE_INO |	\
+		  1 << NILFS_ATIME_INO | 1 << NILFS_SKETCH_INO))
+
+#define NILFS_SYS_INO_BITS   \
+  ((unsigned int)(1 << NILFS_ROOT_INO) | NILFS_MDT_INO_BITS)
+
+#define NILFS_FIRST_INO(sb)  (NILFS_SB(sb)->s_nilfs->ns_first_ino)
+
+#define NILFS_MDT_INODE(sb, ino) \
+  ((ino) < NILFS_FIRST_INO(sb) && (NILFS_MDT_INO_BITS & (1 << (ino))))
+#define NILFS_VALID_INODE(sb, ino) \
+  ((ino) >= NILFS_FIRST_INO(sb) || (NILFS_SYS_INO_BITS & (1 << (ino))))
+
+/**
+ * struct nilfs_transaction_info: context information for synchronization
+ * @ti_magic: Magic number
+ * @ti_save: Backup of journal_info field of task_struct
+ * @ti_flags: Flags
+ * @ti_count: Nest level
+ * @ti_garbage:	List of inode to be put when releasing semaphore
+ */
+struct nilfs_transaction_info {
+	u32			ti_magic;
+	void		       *ti_save;
+				/* This should never used. If this happens,
+				   one of other filesystems has a bug. */
+	unsigned short		ti_flags;
+	unsigned short		ti_count;
+	struct list_head	ti_garbage;
+};
+
+/* ti_magic */
+#define NILFS_TI_MAGIC		0xd9e392fb
+
+/* ti_flags */
+#define NILFS_TI_DYNAMIC_ALLOC	0x0001  /* Allocated from slab */
+#define NILFS_TI_SYNC		0x0002	/* Force to construct segment at the
+					   end of transaction. */
+#define NILFS_TI_GC		0x0004	/* GC context */
+#define NILFS_TI_COMMIT		0x0008	/* Change happened or not */
+#define NILFS_TI_WRITER		0x0010	/* Constructor context */
+
+
+int nilfs_transaction_begin(struct super_block *,
+			    struct nilfs_transaction_info *, int);
+int nilfs_transaction_commit(struct super_block *);
+void nilfs_transaction_abort(struct super_block *);
+
+static inline void nilfs_set_transaction_flag(unsigned int flag)
+{
+	struct nilfs_transaction_info *ti = current->journal_info;
+
+	ti->ti_flags |= flag;
+}
+
+static inline int nilfs_test_transaction_flag(unsigned int flag)
+{
+	struct nilfs_transaction_info *ti = current->journal_info;
+
+	if (ti == NULL || ti->ti_magic != NILFS_TI_MAGIC)
+		return 0;
+	return !!(ti->ti_flags & flag);
+}
+
+static inline int nilfs_doing_gc(void)
+{
+	return nilfs_test_transaction_flag(NILFS_TI_GC);
+}
+
+static inline int nilfs_doing_construction(void)
+{
+	return nilfs_test_transaction_flag(NILFS_TI_WRITER);
+}
+
+static inline struct inode *nilfs_dat_inode(const struct the_nilfs *nilfs)
+{
+	return nilfs_doing_gc() ? nilfs->ns_gc_dat : nilfs->ns_dat;
+}
+
+/*
+ * function prototype
+ */
+#ifdef CONFIG_NILFS_POSIX_ACL
+#error "NILFS: not yet supported POSIX ACL"
+extern int nilfs_permission(struct inode *, int, struct nameidata *);
+extern int nilfs_acl_chmod(struct inode *);
+extern int nilfs_init_acl(struct inode *, struct inode *);
+#else
+#define nilfs_permission   NULL
+
+static inline int nilfs_acl_chmod(struct inode *inode)
+{
+	return 0;
+}
+
+static inline int nilfs_init_acl(struct inode *inode, struct inode *dir)
+{
+	inode->i_mode &= ~current_umask();
+	return 0;
+}
+#endif
+
+#define NILFS_ATIME_DISABLE
+
+/* dir.c */
+extern int nilfs_add_link(struct dentry *, struct inode *);
+extern ino_t nilfs_inode_by_name(struct inode *, struct dentry *);
+extern int nilfs_make_empty(struct inode *, struct inode *);
+extern struct nilfs_dir_entry *
+nilfs_find_entry(struct inode *, struct dentry *, struct page **);
+extern int nilfs_delete_entry(struct nilfs_dir_entry *, struct page *);
+extern int nilfs_empty_dir(struct inode *);
+extern struct nilfs_dir_entry *nilfs_dotdot(struct inode *, struct page **);
+extern void nilfs_set_link(struct inode *, struct nilfs_dir_entry *,
+			   struct page *, struct inode *);
+
+/* file.c */
+extern int nilfs_sync_file(struct file *, struct dentry *, int);
+
+/* ioctl.c */
+long nilfs_ioctl(struct file *, unsigned int, unsigned long);
+int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *, void __user *);
+
+/* inode.c */
+extern struct inode *nilfs_new_inode(struct inode *, int);
+extern void nilfs_free_inode(struct inode *);
+extern int nilfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
+extern void nilfs_set_inode_flags(struct inode *);
+extern int nilfs_read_inode_common(struct inode *, struct nilfs_inode *);
+extern void nilfs_write_inode_common(struct inode *, struct nilfs_inode *, int);
+extern struct inode *nilfs_iget(struct super_block *, unsigned long);
+extern void nilfs_update_inode(struct inode *, struct buffer_head *);
+extern void nilfs_truncate(struct inode *);
+extern void nilfs_delete_inode(struct inode *);
+extern int nilfs_setattr(struct dentry *, struct iattr *);
+extern int nilfs_load_inode_block(struct nilfs_sb_info *, struct inode *,
+				  struct buffer_head **);
+extern int nilfs_inode_dirty(struct inode *);
+extern int nilfs_set_file_dirty(struct nilfs_sb_info *, struct inode *,
+				unsigned);
+extern int nilfs_mark_inode_dirty(struct inode *);
+extern void nilfs_dirty_inode(struct inode *);
+
+/* namei.c */
+extern struct dentry *nilfs_get_parent(struct dentry *);
+
+/* super.c */
+extern struct inode *nilfs_alloc_inode(struct super_block *);
+extern void nilfs_destroy_inode(struct inode *);
+extern void nilfs_error(struct super_block *, const char *, const char *, ...)
+	__attribute__ ((format (printf, 3, 4)));
+extern void nilfs_warning(struct super_block *, const char *, const char *, ...)
+       __attribute__ ((format (printf, 3, 4)));
+extern struct nilfs_super_block *
+nilfs_read_super_block(struct super_block *, u64, int, struct buffer_head **);
+extern int nilfs_store_magic_and_option(struct super_block *,
+					struct nilfs_super_block *, char *);
+extern int nilfs_commit_super(struct nilfs_sb_info *, int);
+extern int nilfs_attach_checkpoint(struct nilfs_sb_info *, __u64);
+extern void nilfs_detach_checkpoint(struct nilfs_sb_info *);
+
+/* gcinode.c */
+int nilfs_gccache_submit_read_data(struct inode *, sector_t, sector_t, __u64,
+				   struct buffer_head **);
+int nilfs_gccache_submit_read_node(struct inode *, sector_t, __u64,
+				   struct buffer_head **);
+int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *);
+int nilfs_init_gccache(struct the_nilfs *);
+void nilfs_destroy_gccache(struct the_nilfs *);
+void nilfs_clear_gcinode(struct inode *);
+struct inode *nilfs_gc_iget(struct the_nilfs *, ino_t, __u64);
+void nilfs_remove_all_gcinode(struct the_nilfs *);
+
+/* gcdat.c */
+int nilfs_init_gcdat_inode(struct the_nilfs *);
+void nilfs_commit_gcdat_inode(struct the_nilfs *);
+void nilfs_clear_gcdat_inode(struct the_nilfs *);
+
+/*
+ * Inodes and files operations
+ */
+extern struct file_operations nilfs_dir_operations;
+extern struct inode_operations nilfs_file_inode_operations;
+extern struct file_operations nilfs_file_operations;
+extern struct address_space_operations nilfs_aops;
+extern struct inode_operations nilfs_dir_inode_operations;
+extern struct inode_operations nilfs_special_inode_operations;
+extern struct inode_operations nilfs_symlink_inode_operations;
+
+/*
+ * filesystem type
+ */
+extern struct file_system_type nilfs_fs_type;
+
+
+#endif	/* _NILFS_H */