1 files changed, 140 insertions, 0 deletions

diff --git a/fs/efs/efs.h b/fs/efs/efs.h
new file mode 100644
index 000000000000..d8305b582ab0
--- /dev/null
+++ b/fs/efs/efs.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 1999 Al Smith
+ *
+ * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
+ * Portions derived from IRIX header files (c) 1988 Silicon Graphics
+ */
+#ifndef _EFS_EFS_H_
+#define _EFS_EFS_H_
+
+#include <linux/fs.h>
+#include <asm/uaccess.h>
+
+#define EFS_VERSION "1.0a"
+
+static const char cprt[] = "EFS: "EFS_VERSION" - (c) 1999 Al Smith <Al.Smith@aeschi.ch.eu.org>";
+
+
+/* 1 block is 512 bytes */
+#define EFS_BLOCKSIZE_BITS      9
+#define EFS_BLOCKSIZE           (1 << EFS_BLOCKSIZE_BITS)
+
+typedef int32_t         efs_block_t;
+typedef uint32_t        efs_ino_t;
+
+#define EFS_DIRECTEXTENTS       12
+
+/*
+ * layout of an extent, in memory and on disk. 8 bytes exactly.
+ */
+typedef union extent_u {
+        unsigned char raw[8];
+        struct extent_s {
+                unsigned int    ex_magic:8;     /* magic # (zero) */
+                unsigned int    ex_bn:24;       /* basic block */
+                unsigned int    ex_length:8;    /* numblocks in this extent */
+                unsigned int    ex_offset:24;   /* logical offset into file */
+        } cooked;
+} efs_extent;
+
+typedef struct edevs {
+        __be16          odev;
+        __be32          ndev;
+} efs_devs;
+
+/*
+ * extent based filesystem inode as it appears on disk.  The efs inode
+ * is exactly 128 bytes long.
+ */
+struct  efs_dinode {
+        __be16          di_mode;        /* mode and type of file */
+        __be16          di_nlink;       /* number of links to file */
+        __be16          di_uid;         /* owner's user id */
+        __be16          di_gid;         /* owner's group id */
+        __be32          di_size;        /* number of bytes in file */
+        __be32          di_atime;       /* time last accessed */
+        __be32          di_mtime;       /* time last modified */
+        __be32          di_ctime;       /* time created */
+        __be32          di_gen;         /* generation number */
+        __be16          di_numextents;  /* # of extents */
+        u_char          di_version;     /* version of inode */
+        u_char          di_spare;       /* spare - used by AFS */
+        union di_addr {
+                efs_extent      di_extents[EFS_DIRECTEXTENTS];
+                efs_devs        di_dev; /* device for IFCHR/IFBLK */
+        } di_u;
+};
+
+/* efs inode storage in memory */
+struct efs_inode_info {
+        int             numextents;
+        int             lastextent;
+
+        efs_extent      extents[EFS_DIRECTEXTENTS];
+        struct inode    vfs_inode;
+};
+
+#include <linux/efs_fs_sb.h>
+
+#define EFS_DIRBSIZE_BITS       EFS_BLOCKSIZE_BITS
+#define EFS_DIRBSIZE            (1 << EFS_DIRBSIZE_BITS)
+
+struct efs_dentry {
+        __be32          inode;
+        unsigned char   namelen;
+        char            name[3];
+};
+
+#define EFS_DENTSIZE    (sizeof(struct efs_dentry) - 3 + 1)
+#define EFS_MAXNAMELEN  ((1 << (sizeof(char) * 8)) - 1)
+
+#define EFS_DIRBLK_HEADERSIZE   4
+#define EFS_DIRBLK_MAGIC        0xbeef  /* moo */
+
+struct efs_dir {
+        __be16  magic;
+        unsigned char   firstused;
+        unsigned char   slots;
+
+        unsigned char   space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
+};
+
+#define EFS_MAXENTS \
+        ((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
+         (EFS_DENTSIZE + sizeof(char)))
+
+#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
+
+#define EFS_REALOFF(offset) ((offset << 1))
+
+
+static inline struct efs_inode_info *INODE_INFO(struct inode *inode)
+{
+        return container_of(inode, struct efs_inode_info, vfs_inode);
+}
+
+static inline struct efs_sb_info *SUPER_INFO(struct super_block *sb)
+{
+        return sb->s_fs_info;
+}
+
+struct statfs;
+struct fid;
+
+extern const struct inode_operations efs_dir_inode_operations;
+extern const struct file_operations efs_dir_operations;
+extern const struct address_space_operations efs_symlink_aops;
+
+extern struct inode *efs_iget(struct super_block *, unsigned long);
+extern efs_block_t efs_map_block(struct inode *, efs_block_t);
+extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
+
+extern struct dentry *efs_lookup(struct inode *, struct dentry *, struct nameidata *);
+extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
+                int fh_len, int fh_type);
+extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
+                int fh_len, int fh_type);
+extern struct dentry *efs_get_parent(struct dentry *);
+extern int efs_bmap(struct inode *, int);
+
+#endif /* _EFS_EFS_H_ */