[net-next-2.6.git] / fs / 9p / 9p.h

/*
 * linux/fs/9p/9p.h
 *
 * 9P protocol definitions.
 *
 *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
 *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
 *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation.
 *
 *  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:
 *  Free Software Foundation
 *  51 Franklin Street, Fifth Floor
 *  Boston, MA  02111-1301  USA
 *
 */

/* Message Types */
enum {
	TVERSION = 100,
	RVERSION,
	TAUTH = 102,
	RAUTH,
	TATTACH = 104,
	RATTACH,
	TERROR = 106,
	RERROR,
	TFLUSH = 108,
	RFLUSH,
	TWALK = 110,
	RWALK,
	TOPEN = 112,
	ROPEN,
	TCREATE = 114,
	RCREATE,
	TREAD = 116,
	RREAD,
	TWRITE = 118,
	RWRITE,
	TCLUNK = 120,
	RCLUNK,
	TREMOVE = 122,
	RREMOVE,
	TSTAT = 124,
	RSTAT,
	TWSTAT = 126,
	RWSTAT,
};

/* modes */
enum {
	V9FS_OREAD = 0x00,
	V9FS_OWRITE = 0x01,
	V9FS_ORDWR = 0x02,
	V9FS_OEXEC = 0x03,
	V9FS_OEXCL = 0x04,
	V9FS_OTRUNC = 0x10,
	V9FS_OREXEC = 0x20,
	V9FS_ORCLOSE = 0x40,
	V9FS_OAPPEND = 0x80,
};

/* permissions */
enum {
	V9FS_DMDIR = 0x80000000,
	V9FS_DMAPPEND = 0x40000000,
	V9FS_DMEXCL = 0x20000000,
	V9FS_DMMOUNT = 0x10000000,
	V9FS_DMAUTH = 0x08000000,
	V9FS_DMTMP = 0x04000000,
	V9FS_DMSYMLINK = 0x02000000,
	V9FS_DMLINK = 0x01000000,
	/* 9P2000.u extensions */
	V9FS_DMDEVICE = 0x00800000,
	V9FS_DMNAMEDPIPE = 0x00200000,
	V9FS_DMSOCKET = 0x00100000,
	V9FS_DMSETUID = 0x00080000,
	V9FS_DMSETGID = 0x00040000,
};

/* qid.types */
enum {
	V9FS_QTDIR = 0x80,
	V9FS_QTAPPEND = 0x40,
	V9FS_QTEXCL = 0x20,
	V9FS_QTMOUNT = 0x10,
	V9FS_QTAUTH = 0x08,
	V9FS_QTTMP = 0x04,
	V9FS_QTSYMLINK = 0x02,
	V9FS_QTLINK = 0x01,
	V9FS_QTFILE = 0x00,
};

#define V9FS_NOTAG	(u16)(~0)
#define V9FS_NOFID	(u32)(~0)
#define V9FS_MAXWELEM	16

/* ample room for Twrite/Rread header (iounit) */
#define V9FS_IOHDRSZ	24

struct v9fs_str {
	u16 len;
	char *str;
};

/* qids are the unique ID for a file (like an inode */
struct v9fs_qid {
	u8 type;
	u32 version;
	u64 path;
};

/* Plan 9 file metadata (stat) structure */
struct v9fs_stat {
	u16 size;
	u16 type;
	u32 dev;
	struct v9fs_qid qid;
	u32 mode;
	u32 atime;
	u32 mtime;
	u64 length;
	struct v9fs_str name;
	struct v9fs_str uid;
	struct v9fs_str gid;
	struct v9fs_str muid;
	struct v9fs_str extension;	/* 9p2000.u extensions */
	u32 n_uid;		/* 9p2000.u extensions */
	u32 n_gid;		/* 9p2000.u extensions */
	u32 n_muid;		/* 9p2000.u extensions */
};

/* file metadata (stat) structure used to create Twstat message
   The is similar to v9fs_stat, but the strings don't point to
   the same memory block and should be freed separately
*/
struct v9fs_wstat {
	u16 size;
	u16 type;
	u32 dev;
	struct v9fs_qid qid;
	u32 mode;
	u32 atime;
	u32 mtime;
	u64 length;
	char *name;
	char *uid;
	char *gid;
	char *muid;
	char *extension;	/* 9p2000.u extensions */
	u32 n_uid;		/* 9p2000.u extensions */
	u32 n_gid;		/* 9p2000.u extensions */
	u32 n_muid;		/* 9p2000.u extensions */
};

/* Structures for Protocol Operations */

struct Tversion {
	u32 msize;
	struct v9fs_str version;
};

struct Rversion {
	u32 msize;
	struct v9fs_str version;
};

struct Tauth {
	u32 afid;
	struct v9fs_str uname;
	struct v9fs_str aname;
};

struct Rauth {
	struct v9fs_qid qid;
};

struct Rerror {
	struct v9fs_str error;
	u32 errno;		/* 9p2000.u extension */
};

struct Tflush {
	u16 oldtag;
};

struct Rflush {
};

struct Tattach {
	u32 fid;
	u32 afid;
	struct v9fs_str uname;
	struct v9fs_str aname;
};

struct Rattach {
	struct v9fs_qid qid;
};

struct Twalk {
	u32 fid;
	u32 newfid;
	u16 nwname;
	struct v9fs_str wnames[16];
};

struct Rwalk {
	u16 nwqid;
	struct v9fs_qid wqids[16];
};

struct Topen {
	u32 fid;
	u8 mode;
};

struct Ropen {
	struct v9fs_qid qid;
	u32 iounit;
};

struct Tcreate {
	u32 fid;
	struct v9fs_str name;
	u32 perm;
	u8 mode;
	struct v9fs_str extension;
};

struct Rcreate {
	struct v9fs_qid qid;
	u32 iounit;
};

struct Tread {
	u32 fid;
	u64 offset;
	u32 count;
};

struct Rread {
	u32 count;
	u8 *data;
};

struct Twrite {
	u32 fid;
	u64 offset;
	u32 count;
	u8 *data;
};

struct Rwrite {
	u32 count;
};

struct Tclunk {
	u32 fid;
};

struct Rclunk {
};

struct Tremove {
	u32 fid;
};

struct Rremove {
};

struct Tstat {
	u32 fid;
};

struct Rstat {
	struct v9fs_stat stat;
};

struct Twstat {
	u32 fid;
	struct v9fs_stat stat;
};

struct Rwstat {
};

/*
  * fcall is the primary packet structure
  *
  */

struct v9fs_fcall {
	u32 size;
	u8 id;
	u16 tag;
	void *sdata;

	union {
		struct Tversion tversion;
		struct Rversion rversion;
		struct Tauth tauth;
		struct Rauth rauth;
		struct Rerror rerror;
		struct Tflush tflush;
		struct Rflush rflush;
		struct Tattach tattach;
		struct Rattach rattach;
		struct Twalk twalk;
		struct Rwalk rwalk;
		struct Topen topen;
		struct Ropen ropen;
		struct Tcreate tcreate;
		struct Rcreate rcreate;
		struct Tread tread;
		struct Rread rread;
		struct Twrite twrite;
		struct Rwrite rwrite;
		struct Tclunk tclunk;
		struct Rclunk rclunk;
		struct Tremove tremove;
		struct Rremove rremove;
		struct Tstat tstat;
		struct Rstat rstat;
		struct Twstat twstat;
		struct Rwstat rwstat;
	} params;
};

#define PRINT_FCALL_ERROR(s, fcall) dprintk(DEBUG_ERROR, "%s: %.*s\n", s, \
	fcall?fcall->params.rerror.error.len:0, \
	fcall?fcall->params.rerror.error.str:"");

int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
		   char *version, struct v9fs_fcall **rcall);

int v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
		  u32 fid, u32 afid, struct v9fs_fcall **rcall);

int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid);

int v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid,
		struct v9fs_fcall **rcall);

int v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
		 struct v9fs_wstat *wstat, struct v9fs_fcall **rcall);

int v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
		char *name, struct v9fs_fcall **rcall);

int v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
		struct v9fs_fcall **rcall);

int v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
		  struct v9fs_fcall **rcall);

int v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
	u32 perm, u8 mode, char *extension, struct v9fs_fcall **rcall);

int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid,
		u64 offset, u32 count, struct v9fs_fcall **rcall);

int v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
		 u32 count, const char __user * data,
		 struct v9fs_fcall **rcall);
int v9fs_printfcall(char *, int, struct v9fs_fcall *, int);
Commit	Line	Data
b8cf945b EVH	1	/*
	2	* linux/fs/9p/9p.h
	3	*
	4	* 9P protocol definitions.
	5	*
531b1094	6	* Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
b8cf945b EVH	7	* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
	8	* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
42e8c509 EVH	11	* it under the terms of the GNU General Public License version 2
42e8c509 EVH	12	* as published by the Free Software Foundation.
b8cf945b EVH	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to:
	21	* Free Software Foundation
	22	* 51 Franklin Street, Fifth Floor
	23	* Boston, MA 02111-1301 USA
	24	*
	25	*/
	26
	27	/* Message Types */
	28	enum {
	29	TVERSION = 100,
	30	RVERSION,
	31	TAUTH = 102,
	32	RAUTH,
	33	TATTACH = 104,
	34	RATTACH,
	35	TERROR = 106,
	36	RERROR,
	37	TFLUSH = 108,
	38	RFLUSH,
	39	TWALK = 110,
	40	RWALK,
	41	TOPEN = 112,
	42	ROPEN,
	43	TCREATE = 114,
	44	RCREATE,
	45	TREAD = 116,
	46	RREAD,
	47	TWRITE = 118,
	48	RWRITE,
	49	TCLUNK = 120,
	50	RCLUNK,
	51	TREMOVE = 122,
	52	RREMOVE,
	53	TSTAT = 124,
	54	RSTAT,
	55	TWSTAT = 126,
	56	RWSTAT,
	57	};
	58
	59	/* modes */
	60	enum {
	61	V9FS_OREAD = 0x00,
	62	V9FS_OWRITE = 0x01,
	63	V9FS_ORDWR = 0x02,
	64	V9FS_OEXEC = 0x03,
	65	V9FS_OEXCL = 0x04,
	66	V9FS_OTRUNC = 0x10,
	67	V9FS_OREXEC = 0x20,
	68	V9FS_ORCLOSE = 0x40,
	69	V9FS_OAPPEND = 0x80,
	70	};
	71
	72	/* permissions */
	73	enum {
	74	V9FS_DMDIR = 0x80000000,
	75	V9FS_DMAPPEND = 0x40000000,
	76	V9FS_DMEXCL = 0x20000000,
77	V9FS_DMMOUNT = 0x10000000,
78	V9FS_DMAUTH = 0x08000000,
79	V9FS_DMTMP = 0x04000000,
80	V9FS_DMSYMLINK = 0x02000000,
81	V9FS_DMLINK = 0x01000000,
82	/* 9P2000.u extensions */
83	V9FS_DMDEVICE = 0x00800000,
84	V9FS_DMNAMEDPIPE = 0x00200000,
85	V9FS_DMSOCKET = 0x00100000,
86	V9FS_DMSETUID = 0x00080000,
87	V9FS_DMSETGID = 0x00040000,
88	};
89
90	/* qid.types */
91	enum {
92	V9FS_QTDIR = 0x80,
93	V9FS_QTAPPEND = 0x40,
94	V9FS_QTEXCL = 0x20,
95	V9FS_QTMOUNT = 0x10,
96	V9FS_QTAUTH = 0x08,
97	V9FS_QTTMP = 0x04,
98	V9FS_QTSYMLINK = 0x02,
99	V9FS_QTLINK = 0x01,
100	V9FS_QTFILE = 0x00,
101	};
102
3cf6429a LI	103	#define V9FS_NOTAG (u16)(~0)
3cf6429a LI	104	#define V9FS_NOFID (u32)(~0)
531b1094	105	#define V9FS_MAXWELEM 16
3cf6429a	106
b8cf945b EVH	107	/* ample room for Twrite/Rread header (iounit) */
	108	#define V9FS_IOHDRSZ 24
	109
531b1094 LI	110	struct v9fs_str {
	111	u16 len;
	112	char *str;
	113	};
	114
b8cf945b EVH	115	/* qids are the unique ID for a file (like an inode */
	116	struct v9fs_qid {
	117	u8 type;
	118	u32 version;
	119	u64 path;
	120	};
	121
	122	/* Plan 9 file metadata (stat) structure */
	123	struct v9fs_stat {
531b1094 LI	124	u16 size;
	125	u16 type;
	126	u32 dev;
	127	struct v9fs_qid qid;
	128	u32 mode;
	129	u32 atime;
	130	u32 mtime;
	131	u64 length;
	132	struct v9fs_str name;
	133	struct v9fs_str uid;
	134	struct v9fs_str gid;
	135	struct v9fs_str muid;
	136	struct v9fs_str extension; /* 9p2000.u extensions */
	137	u32 n_uid; /* 9p2000.u extensions */
	138	u32 n_gid; /* 9p2000.u extensions */
	139	u32 n_muid; /* 9p2000.u extensions */
	140	};
	141
	142	/* file metadata (stat) structure used to create Twstat message
	143	The is similar to v9fs_stat, but the strings don't point to
	144	the same memory block and should be freed separately
	145	*/
	146	struct v9fs_wstat {
b8cf945b EVH	147	u16 size;
	148	u16 type;
	149	u32 dev;
	150	struct v9fs_qid qid;
	151	u32 mode;
	152	u32 atime;
	153	u32 mtime;
	154	u64 length;
	155	char *name;
	156	char *uid;
	157	char *gid;
	158	char *muid;
	159	char extension; / 9p2000.u extensions */
	160	u32 n_uid; /* 9p2000.u extensions */
	161	u32 n_gid; /* 9p2000.u extensions */
	162	u32 n_muid; /* 9p2000.u extensions */
b8cf945b EVH	163	};
	164
	165	/* Structures for Protocol Operations */
	166
	167	struct Tversion {
	168	u32 msize;
531b1094	169	struct v9fs_str version;
b8cf945b EVH	170	};
	171
	172	struct Rversion {
	173	u32 msize;
531b1094	174	struct v9fs_str version;
b8cf945b EVH	175	};
	176
	177	struct Tauth {
	178	u32 afid;
531b1094 LI	179	struct v9fs_str uname;
531b1094 LI	180	struct v9fs_str aname;
b8cf945b EVH	181	};
	182
	183	struct Rauth {
	184	struct v9fs_qid qid;
	185	};
	186
	187	struct Rerror {
531b1094	188	struct v9fs_str error;
b8cf945b EVH	189	u32 errno; /* 9p2000.u extension */
	190	};
	191
	192	struct Tflush {
531b1094	193	u16 oldtag;
b8cf945b EVH	194	};
	195
	196	struct Rflush {
	197	};
	198
	199	struct Tattach {
	200	u32 fid;
	201	u32 afid;
531b1094 LI	202	struct v9fs_str uname;
531b1094 LI	203	struct v9fs_str aname;
b8cf945b EVH	204	};
	205
	206	struct Rattach {
	207	struct v9fs_qid qid;
	208	};
	209
	210	struct Twalk {
	211	u32 fid;
	212	u32 newfid;
531b1094 LI	213	u16 nwname;
531b1094 LI	214	struct v9fs_str wnames[16];
b8cf945b EVH	215	};
	216
	217	struct Rwalk {
531b1094 LI	218	u16 nwqid;
531b1094 LI	219	struct v9fs_qid wqids[16];
b8cf945b EVH	220	};
	221
	222	struct Topen {
	223	u32 fid;
	224	u8 mode;
	225	};
	226
	227	struct Ropen {
	228	struct v9fs_qid qid;
	229	u32 iounit;
	230	};
	231
	232	struct Tcreate {
	233	u32 fid;
531b1094	234	struct v9fs_str name;
b8cf945b EVH	235	u32 perm;
b8cf945b EVH	236	u8 mode;
16cce6d2	237	struct v9fs_str extension;
b8cf945b EVH	238	};
	239
	240	struct Rcreate {
	241	struct v9fs_qid qid;
	242	u32 iounit;
	243	};
	244
	245	struct Tread {
	246	u32 fid;
	247	u64 offset;
	248	u32 count;
	249	};
	250
	251	struct Rread {
	252	u32 count;
	253	u8 *data;
	254	};
	255
	256	struct Twrite {
	257	u32 fid;
	258	u64 offset;
	259	u32 count;
	260	u8 *data;
	261	};
	262
	263	struct Rwrite {
	264	u32 count;
	265	};
	266
	267	struct Tclunk {
	268	u32 fid;
	269	};
	270
	271	struct Rclunk {
	272	};
	273
	274	struct Tremove {
	275	u32 fid;
	276	};
	277
	278	struct Rremove {
	279	};
	280
	281	struct Tstat {
	282	u32 fid;
	283	};
	284
	285	struct Rstat {
531b1094	286	struct v9fs_stat stat;
b8cf945b EVH	287	};
	288
	289	struct Twstat {
	290	u32 fid;
531b1094	291	struct v9fs_stat stat;
b8cf945b EVH	292	};
	293
	294	struct Rwstat {
	295	};
	296
	297	/*
	298	* fcall is the primary packet structure
	299	*
	300	*/
	301
	302	struct v9fs_fcall {
	303	u32 size;
	304	u8 id;
	305	u16 tag;
531b1094	306	void *sdata;
b8cf945b EVH	307
	308	union {
	309	struct Tversion tversion;
	310	struct Rversion rversion;
	311	struct Tauth tauth;
	312	struct Rauth rauth;
	313	struct Rerror rerror;
	314	struct Tflush tflush;
	315	struct Rflush rflush;
	316	struct Tattach tattach;
	317	struct Rattach rattach;
	318	struct Twalk twalk;
	319	struct Rwalk rwalk;
	320	struct Topen topen;
	321	struct Ropen ropen;
	322	struct Tcreate tcreate;
	323	struct Rcreate rcreate;
	324	struct Tread tread;
	325	struct Rread rread;
	326	struct Twrite twrite;
	327	struct Rwrite rwrite;
	328	struct Tclunk tclunk;
	329	struct Rclunk rclunk;
	330	struct Tremove tremove;
	331	struct Rremove rremove;
	332	struct Tstat tstat;
	333	struct Rstat rstat;
	334	struct Twstat twstat;
	335	struct Rwstat rwstat;
	336	} params;
	337	};
	338
531b1094 LI	339	#define PRINT_FCALL_ERROR(s, fcall) dprintk(DEBUG_ERROR, "%s: %.*s\n", s, \
	340	fcall?fcall->params.rerror.error.len:0, \
	341	fcall?fcall->params.rerror.error.str:"");
3cf6429a	342
b8cf945b EVH	343	int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
	344	char version, struct v9fs_fcall *rcall);
	345
	346	int v9fs_t_attach(struct v9fs_session_info v9ses, char uname, char *aname,
	347	u32 fid, u32 afid, struct v9fs_fcall **rcall);
	348
3cf6429a	349	int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid);
b8cf945b	350
b8cf945b EVH	351	int v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid,
	352	struct v9fs_fcall **rcall);
	353
	354	int v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
531b1094	355	struct v9fs_wstat wstat, struct v9fs_fcall *rcall);
b8cf945b EVH	356
	357	int v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
	358	char name, struct v9fs_fcall *rcall);
	359
	360	int v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
	361	struct v9fs_fcall **rcall);
	362
	363	int v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
	364	struct v9fs_fcall **rcall);
	365
	366	int v9fs_t_create(struct v9fs_session_info v9ses, u32 fid, char name,
16cce6d2	367	u32 perm, u8 mode, char extension, struct v9fs_fcall *rcall);
b8cf945b EVH	368
	369	int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid,
	370	u64 offset, u32 count, struct v9fs_fcall **rcall);
	371
	372	int v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
531b1094 LI	373	u32 count, const char __user * data,
531b1094 LI	374	struct v9fs_fcall **rcall);
5174fdab	375	int v9fs_printfcall(char , int, struct v9fs_fcall , int);