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#ifndef _9FS_9P_H_
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#define _9FS_9P_H_
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#define U9FS_AUTHLEN 13
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#define U9FS_NAMELEN    28
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#define U9FS_TICKETLEN  72
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#define U9FS_ERRLEN     64
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#define U9FS_DOMLEN     48
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#define U9FS_CHALLEN    8
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#define U9FS_DIRLEN     116
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#define U9FS_MAXFDATA  8192
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#define U9FS_MAXDDATA  (((int)U9FS_MAXFDATA/U9FS_DIRLEN)*U9FS_DIRLEN)
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#define U9P_MODE_RD    0x0
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#define U9P_MODE_WR    0x1
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#define U9P_MODE_RDWR  0x2
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#define U9P_MODE_EX    0x3
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#define U9P_MODE_TRUNC 0x10
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#define U9P_MODE_CLOSE 0x40
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#define U9P_PERM_CHDIR(m) (0x80000000&(m))
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#define U9P_PERM_OWNER(m) ((m)&0x7)
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#define U9P_PERM_GROUP(m) (((m)>>3)&0x7)
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#define U9P_PERM_OTHER(m) (((m)>>6)&0x7)
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#define U9P_PERM_ALL(m)   ((m)&0777)
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/* this is too small */
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typedef u_int32_t u9fsfh_t;
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struct u9fd_qid {
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	u9fsfh_t	path;
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	u_int32_t	vers;
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};
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struct	u9fsreq {
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  TAILQ_ENTRY(u9fsreq) r_chain;
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  struct u9fsreq * r_rep;
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  struct mbuf * r_mrep;
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  struct proc	*r_procp;	/* Proc that did I/O system call */
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  struct u9fsmount *r_nmp;
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  /* actual content of the 9P message */
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	char	r_type;
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	short	r_fid;
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	u_short	r_tag;
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	union {
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		struct {
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			u_short	oldtag;		/* Tflush */
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			struct u9fd_qid qid;		/* Rattach, Rwalk, Ropen, Rcreate */
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			char	rauth[U9FS_AUTHLEN];	/* Rattach */
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		} u1;
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		struct {
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			char	uname[U9FS_NAMELEN];		/* Tattach */
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			char	aname[U9FS_NAMELEN];		/* Tattach */
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			char	ticket[U9FS_TICKETLEN];	/* Tattach */
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			char	auth[U9FS_AUTHLEN];	/* Tattach */
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		} u2;
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		struct {
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			char	ename[U9FS_ERRLEN];		/* Rerror */
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			char	authid[U9FS_NAMELEN];	/* Rsession */
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			char	authdom[U9FS_DOMLEN];	/* Rsession */
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			char	chal[U9FS_CHALLEN];		/* Tsession/Rsession */
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		} u3;
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		struct {
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			u_int32_t	perm;		/* Tcreate */
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			short	newfid;		/* Tclone, Tclwalk */
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			char	name[U9FS_NAMELEN];	/* Twalk, Tclwalk, Tcreate */
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			char	mode;		/* Tcreate, Topen */
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		} u4;
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		struct {
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			u_int64_t	offset;		/* Tread, Twrite */
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			u_short	        count;		/* Tread, Twrite, Rread */
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			char	*data;		/* Twrite, Rread */
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		} u5;
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			char	stat[U9FS_DIRLEN];	/* Twstat, Rstat */
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	} u;
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};
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#define r_oldtag u.u1.oldtag
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#define r_qid u.u1.qid
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#define r_rauth u.u1.rauth
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#define r_uname u.u2.uname
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#define r_aname u.u2.aname
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#define r_ticket  u.u2.ticket
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#define r_auth  u.u2.auth
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#define r_ename  u.u3.ename
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#define r_authid  u.u3.authid
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#define r_authdom  u.u3.authdom
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#define r_chal  u.u3.chal
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#define r_perm  u.u4.perm
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#define r_newfid  u.u4.newfid
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#define r_name  u.u4.name
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#define r_mode  u.u4.mode
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#define r_offset  u.u5.offset
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#define r_count  u.u5.count
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#define r_data  u.u5.data
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#define r_stat  u.stat
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extern TAILQ_HEAD(u9fs_reqq, u9fsreq) u9fs_reqq;
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struct u9fsdir {
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  char	dir_name[U9FS_NAMELEN];
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  char	dir_uid[U9FS_NAMELEN];
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  char	dir_gid[U9FS_NAMELEN];
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  struct u9fd_qid	dir_qid;
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  u_int32_t	dir_mode;
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  u_int32_t	dir_atime;
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  u_int32_t	dir_mtime;
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  union {
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    u_int64_t	length;
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    struct {	/* little endian */
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      u_int32_t	llength;
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      u_int32_t	hlength;
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    } l;
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  } u;
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  u_short	dir_type;
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  u_short	dir_dev;
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};
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#define dir_length u.length
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#define dir_llength u.l.llength
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#define dir_hlength u.l.hlength
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enum
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{
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	Tnop =		50,
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	Rnop,
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	Tosession =	52,	/* illegal */
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	Rosession,		/* illegal */
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	Terror =	54,	/* illegal */
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	Rerror,
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	Tflush =	56,
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	Rflush,
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	Toattach =	58,	/* illegal */
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	Roattach,		/* illegal */
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	Tclone =	60,
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	Rclone,
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	Twalk =		62,
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	Rwalk,
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	Topen =		64,
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	Ropen,
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	Tcreate =	66,
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	Rcreate,
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	Tread =		68,
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	Rread,
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	Twrite =	70,
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	Rwrite,
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	Tclunk =	72,
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	Rclunk,
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	Tremove =	74,
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	Rremove,
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	Tstat =		76,
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	Rstat,
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	Twstat =	78,
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	Rwstat,
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	Tclwalk =	80,
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	Rclwalk,
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	Tauth =		82,	/* illegal */
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	Rauth,			/* illegal */
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	Tsession =	84,
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	Rsession,
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	Tattach =	86,
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	Rattach,
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	Ttunnel =	88,
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	Rtunnel,
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	Tmax
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};
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static char * u9p_types[] = {
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  "Tnop",
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  "Rnop",
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  "Tosession",
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  "Rosession",
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  "Terror",
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  "Rerror",
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  "Tflush",
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  "Rflush",
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  "Toattach",
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  "Roattach",
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  "Tclone",
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  "Rclone",
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  "Twalk",
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  "Rwalk",
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  "Topen",
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  "Ropen",
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  "Tcreate",
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  "Rcreate",
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  "Tread",
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  "Rread",
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  "Twrite",
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  "Rwrite",
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  "Tclunk",
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  "Rclunk",
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  "Tremove",
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  "Rremove",
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  "Tstat",
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  "Rstat",
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  "Twstat",
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  "Rwstat",
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  "Tclwalk",
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  "Rclwalk",
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  "Tauth",
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  "Rauth",
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  "Tsession",
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  "Rsession",
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  "Tattach",
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  "Rattach",
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  "Ttunnel",
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  "Rtunnel",
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  "Tmax"
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};
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int u9p_m2s __P((char *ap, int n, struct u9fsreq *f));
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int u9p_s2m __P((struct u9fsreq *f, char *ap, int copydata));
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int u9p_m2d __P((char *ap, struct u9fsdir *f));
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int u9p_d2m __P((struct u9fsdir *f, char *ap));
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int u9p_type __P((char * t));
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int u9p_m_m2s __P((struct mbuf **m, struct u9fsreq *f));
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struct mbuf * u9p_m_s2m __P((struct u9fsreq *f));
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int u9p_m_m2d __P((struct mbuf **m, struct u9fsdir *f));
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struct mbuf * u9p_m_d2m __P((struct u9fsdir *f));
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u_short u9p_m_tag __P((struct mbuf **m));
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#endif