Import sources from 2011-03-30 iso image

1 files changed, 222 insertions, 0 deletions

diff --git a/sys/src/cmd/ext2srv/dat.h b/sys/src/cmd/ext2srv/dat.h
new file mode 100755
index 000000000..ce4e61e35
--- /dev/null
+++ b/sys/src/cmd/ext2srv/dat.h
@@ -0,0 +1,222 @@
+typedef struct Xfs	Xfs;
+typedef struct Xfile	Xfile;
+typedef struct Iobuf	Iobuf;
+typedef struct Ext2 Ext2;
+
+typedef struct SuperBlock SuperBlock;
+typedef struct GroupDesc GroupDesc;
+typedef struct Inode Inode;
+typedef struct DirEntry DirEntry;
+
+#define SECTORSIZE	512
+#define OFFSET_SUPER_BLOCK	1024
+
+#define EXT2_SUPER_MAGIC	0xEF53
+#define EXT2_MIN_BLOCK_SIZE  1024
+#define EXT2_MAX_BLOCK_SIZE  4096
+#define EXT2_ROOT_INODE	2
+#define EXT2_FIRST_INO		11
+#define EXT2_VALID_FS	0x0001
+#define EXT2_ERROR_FS	0x0002
+
+/*
+ * Structure of the super block
+ */
+struct SuperBlock {
+	uint	s_inodes_count;		/* Inodes count */
+	uint	s_blocks_count;		/* Blocks count */
+	uint	s_r_blocks_count;	/* Reserved blocks count */
+	uint	s_free_blocks_count;	/* Free blocks count */
+	uint	s_free_inodes_count;	/* Free inodes count */
+	uint	s_first_data_block;	/* First Data Block */
+	uint	s_log_block_size;	/* Block size */
+	int	s_log_frag_size;	/* Fragment size */
+	uint	s_blocks_per_group;	/* # Blocks per group */
+	uint	s_frags_per_group;	/* # Fragments per group */
+	uint	s_inodes_per_group;	/* # Inodes per group */
+	uint	s_mtime;		/* Mount time */
+	uint	s_wtime;		/* Write time */
+	ushort	s_mnt_count;		/* Mount count */
+	short	s_max_mnt_count;	/* Maximal mount count */
+	ushort	s_magic;		/* Magic signature */
+	ushort	s_state;		/* File system state */
+	ushort	s_errors;		/* Behaviour when detecting errors */
+	ushort	s_pad;
+	uint	s_lastcheck;		/* time of last check */
+	uint	s_checkinterval;	/* max. time between checks */
+	uint	s_creator_os;		/* OS */
+	uint	s_rev_level;		/* Revision level */
+	ushort	s_def_resuid;		/* Default uid for reserved blocks */
+	ushort	s_def_resgid;		/* Default gid for reserved blocks */
+	uint	s_reserved[235];	/* Padding to the end of the block */
+};
+
+/*
+ * Structure of a blocks group descriptor
+ */
+struct GroupDesc
+{
+	uint	bg_block_bitmap;		/* Blocks bitmap block */
+	uint	bg_inode_bitmap;		/* Inodes bitmap block */
+	uint	bg_inode_table;		/* Inodes table block */
+	ushort	bg_free_blocks_count;	/* Free blocks count */
+	ushort	bg_free_inodes_count;	/* Free inodes count */
+	ushort	bg_used_dirs_count;	/* Directories count */
+	ushort	bg_pad;
+	uint	bg_reserved[3];
+};
+
+/*
+ * Constants relative to the data blocks
+ */
+#define	EXT2_NDIR_BLOCKS		12
+#define	EXT2_IND_BLOCK			EXT2_NDIR_BLOCKS
+#define	EXT2_DIND_BLOCK			(EXT2_IND_BLOCK + 1)
+#define	EXT2_TIND_BLOCK			(EXT2_DIND_BLOCK + 1)
+#define	EXT2_N_BLOCKS			(EXT2_TIND_BLOCK + 1)
+
+/*
+ * Structure of an inode on the disk
+ */
+struct Inode {
+	ushort i_mode;		/* File mode */
+	ushort i_uid;		/* Owner Uid */
+	uint  i_size;		/* Size in bytes */
+	uint  i_atime;		/* Access time */
+	uint i_ctime;		/* Creation time */
+	uint  i_mtime;		/* Modification time */
+	uint  i_dtime;		/* Deletion Time */
+	ushort i_gid;		/* Group Id */
+	ushort i_links_count;	/* Links count */
+	uint  i_blocks;	/* Blocks count */
+	uint  i_flags;		/* File flags */
+	uint osd1;				
+	uint	i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
+	uint	i_version;	/* File version (for NFS) */
+	uint	i_file_acl;	/* File ACL */
+	uint	i_dir_acl;	/* Directory ACL */
+	uint	i_faddr;		/* Fragment address */
+	uchar osd2[12];
+};
+
+/*
+ * Structure of a directory entry
+ */
+#define EXT2_NAME_LEN 255
+#define DIR_REC_LEN(name_len)	(((name_len) + 8 + 3) & ~3)
+
+struct DirEntry {
+	uint	inode;			/* Inode number */
+	ushort	rec_len;		/* Directory entry length */
+	uchar	name_len;		/* Name length */
+	uchar	reserved;
+	char	name[EXT2_NAME_LEN];	/* File name */
+};
+
+#define S_IFMT  00170000
+#define S_IFLNK	 0120000
+#define S_IFREG  0100000
+#define S_IFDIR  0040000
+
+#define S_ISLNK(m)	(((m) & S_IFMT) == S_IFLNK)
+#define S_ISREG(m)	(((m) & S_IFMT) == S_IFREG)
+#define S_ISDIR(m)	(((m) & S_IFMT) == S_IFDIR)
+
+#define DEFAULT_UID	200
+#define DEFAULT_GID	100
+
+struct Iobuf
+{
+	Xfs *dev;
+	long	addr;
+	Iobuf *next;
+	Iobuf *prev;
+	Iobuf *hash;
+	int busy;
+	int dirty;
+	char *iobuf;
+};
+
+struct Xfs{
+	Xfs *next;
+	char *name;		/* of file containing external f.s. */
+	Qid	qid;		/* of file containing external f.s. */
+	long	ref;		/* attach count */
+	Qid	rootqid;	/* of plan9 constructed root directory */
+	short	dev;
+	short	fmt;
+	void *ptr; 
+
+	/* data from super block */
+
+	int block_size;
+	int desc_per_block;
+	int inodes_per_group;
+	int inodes_per_block;
+	int addr_per_block;
+	int blocks_per_group;
+
+	int ngroups;
+	int superaddr, superoff;
+	int grpaddr;
+};
+
+struct Xfile{
+	Xfile *next;		/* in hash bucket */
+	long	client;
+	long	fid;
+	Xfs *	xf;
+	void *	ptr;
+
+	uint inbr;		/* inode nbr */
+	uint pinbr;	/* parrent inode */
+	ulong bufaddr;	/* addr of inode block */
+	ulong bufoffset;
+	int root;		/* true on attach for ref count */
+	int dirindex;	/* next dir entry to read */
+};
+
+#define EXT2_SUPER		1
+#define EXT2_DESC		2
+#define EXT2_BBLOCK	3
+#define EXT2_BINODE	4
+
+struct Ext2{
+	char type;
+	union{
+		SuperBlock *sb;
+		GroupDesc *gd;
+		char *bmp;
+	}u;
+	Iobuf *buf;
+};
+
+#define DESC_ADDR(xf,n)		( (xf)->grpaddr + ((n)/(xf)->desc_per_block) )
+#define DESC_OFFSET(xf,d,n)	( ((GroupDesc *)(d)) + ((n)%(xf)->desc_per_block) )
+
+enum{
+	Asis, Clean, Clunk
+};
+
+enum{
+	Enevermind,
+	Eformat,
+	Eio,
+	Enomem,
+	Enonexist,
+	Eexist,
+	Eperm,
+	Enofilsys,
+	Eauth,
+	Enospace,
+	Elink,
+	Elongname,
+	Eintern,
+	Ecorrupt,
+	Enotclean
+};
+
+extern int	chatty;
+extern int	errno;
+extern char	*deffile;
+extern int rdonly;