include/net/9p/9p.h - kernel/msm-4.9 - Gitiles

 /*
  * include/net/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
  *
  */

 #ifndef NET_9P_H
 #define NET_9P_H

 #ifdef CONFIG_NET_9P_DEBUG

 #define P9_DEBUG_ERROR		(1<<0)
 #define P9_DEBUG_9P	        (1<<2)
 #define P9_DEBUG_VFS	        (1<<3)
 #define P9_DEBUG_CONV		(1<<4)
 #define P9_DEBUG_MUX		(1<<5)
 #define P9_DEBUG_TRANS		(1<<6)
 #define P9_DEBUG_SLABS	      	(1<<7)
 #define P9_DEBUG_FCALL		(1<<8)

 extern unsigned int p9_debug_level;

 #define P9_DPRINTK(level, format, arg...) \
 do {  \
 	if ((p9_debug_level & level) == level) \
 		printk(KERN_NOTICE "-- %s (%d): " \
 		format , __FUNCTION__, task_pid_nr(current) , ## arg); \
 } while (0)

 #define PRINT_FCALL_ERROR(s, fcall) P9_DPRINTK(P9_DEBUG_ERROR,   \
 	"%s: %.*s\n", s, fcall?fcall->params.rerror.error.len:0, \
 	fcall?fcall->params.rerror.error.str:"");

 #else
 #define P9_DPRINTK(level, format, arg...)  do { } while (0)
 #define PRINT_FCALL_ERROR(s, fcall) do { } while (0)
 #endif

 #define P9_EPRINTK(level, format, arg...) \
 do { \
 	printk(level "9p: %s (%d): " \
 		format , __FUNCTION__, task_pid_nr(current), ## arg); \
 } while (0)


 /* Message Types */
 enum {
 	P9_TVERSION = 100,
 	P9_RVERSION,
 	P9_TAUTH = 102,
 	P9_RAUTH,
 	P9_TATTACH = 104,
 	P9_RATTACH,
 	P9_TERROR = 106,
 	P9_RERROR,
 	P9_TFLUSH = 108,
 	P9_RFLUSH,
 	P9_TWALK = 110,
 	P9_RWALK,
 	P9_TOPEN = 112,
 	P9_ROPEN,
 	P9_TCREATE = 114,
 	P9_RCREATE,
 	P9_TREAD = 116,
 	P9_RREAD,
 	P9_TWRITE = 118,
 	P9_RWRITE,
 	P9_TCLUNK = 120,
 	P9_RCLUNK,
 	P9_TREMOVE = 122,
 	P9_RREMOVE,
 	P9_TSTAT = 124,
 	P9_RSTAT,
 	P9_TWSTAT = 126,
 	P9_RWSTAT,
 };

 /* open modes */
 enum {
 	P9_OREAD = 0x00,
 	P9_OWRITE = 0x01,
 	P9_ORDWR = 0x02,
 	P9_OEXEC = 0x03,
 	P9_OEXCL = 0x04,
 	P9_OTRUNC = 0x10,
 	P9_OREXEC = 0x20,
 	P9_ORCLOSE = 0x40,
 	P9_OAPPEND = 0x80,
 };

 /* permissions */
 enum {
 	P9_DMDIR = 0x80000000,
 	P9_DMAPPEND = 0x40000000,
 	P9_DMEXCL = 0x20000000,
 	P9_DMMOUNT = 0x10000000,
 	P9_DMAUTH = 0x08000000,
 	P9_DMTMP = 0x04000000,
 	P9_DMSYMLINK = 0x02000000,
 	P9_DMLINK = 0x01000000,
 	/* 9P2000.u extensions */
 	P9_DMDEVICE = 0x00800000,
 	P9_DMNAMEDPIPE = 0x00200000,
 	P9_DMSOCKET = 0x00100000,
 	P9_DMSETUID = 0x00080000,
 	P9_DMSETGID = 0x00040000,
 };

 /* qid.types */
 enum {
 	P9_QTDIR = 0x80,
 	P9_QTAPPEND = 0x40,
 	P9_QTEXCL = 0x20,
 	P9_QTMOUNT = 0x10,
 	P9_QTAUTH = 0x08,
 	P9_QTTMP = 0x04,
 	P9_QTSYMLINK = 0x02,
 	P9_QTLINK = 0x01,
 	P9_QTFILE = 0x00,
 };

 #define P9_NOTAG	(u16)(~0)
 #define P9_NOFID	(u32)(~0)
 #define P9_MAXWELEM	16

 /* ample room for Twrite/Rread header */
 #define P9_IOHDRSZ	24

 struct p9_str {
 	u16 len;
 	char *str;
 };

 /* qids are the unique ID for a file (like an inode */
 struct p9_qid {
 	u8 type;
 	u32 version;
 	u64 path;
 };

 /* Plan 9 file metadata (stat) structure */
 struct p9_stat {
 	u16 size;
 	u16 type;
 	u32 dev;
 	struct p9_qid qid;
 	u32 mode;
 	u32 atime;
 	u32 mtime;
 	u64 length;
 	struct p9_str name;
 	struct p9_str uid;
 	struct p9_str gid;
 	struct p9_str muid;
 	struct p9_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 p9_stat, but the strings don't point to
    the same memory block and should be freed separately
 */
 struct p9_wstat {
 	u16 size;
 	u16 type;
 	u32 dev;
 	struct p9_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 p9_tversion {
 	u32 msize;
 	struct p9_str version;
 };

 struct p9_rversion {
 	u32 msize;
 	struct p9_str version;
 };

 struct p9_tauth {
 	u32 afid;
 	struct p9_str uname;
 	struct p9_str aname;
 	u32 n_uname;		/* 9P2000.u extensions */
 };

 struct p9_rauth {
 	struct p9_qid qid;
 };

 struct p9_rerror {
 	struct p9_str error;
 	u32 errno;		/* 9p2000.u extension */
 };

 struct p9_tflush {
 	u16 oldtag;
 };

 struct p9_rflush {
 };

 struct p9_tattach {
 	u32 fid;
 	u32 afid;
 	struct p9_str uname;
 	struct p9_str aname;
 	u32 n_uname;		/* 9P2000.u extensions */
 };

 struct p9_rattach {
 	struct p9_qid qid;
 };

 struct p9_twalk {
 	u32 fid;
 	u32 newfid;
 	u16 nwname;
 	struct p9_str wnames[16];
 };

 struct p9_rwalk {
 	u16 nwqid;
 	struct p9_qid wqids[16];
 };

 struct p9_topen {
 	u32 fid;
 	u8 mode;
 };

 struct p9_ropen {
 	struct p9_qid qid;
 	u32 iounit;
 };

 struct p9_tcreate {
 	u32 fid;
 	struct p9_str name;
 	u32 perm;
 	u8 mode;
 	struct p9_str extension;
 };

 struct p9_rcreate {
 	struct p9_qid qid;
 	u32 iounit;
 };

 struct p9_tread {
 	u32 fid;
 	u64 offset;
 	u32 count;
 };

 struct p9_rread {
 	u32 count;
 	u8 *data;
 };

 struct p9_twrite {
 	u32 fid;
 	u64 offset;
 	u32 count;
 	u8 *data;
 };

 struct p9_rwrite {
 	u32 count;
 };

 struct p9_tclunk {
 	u32 fid;
 };

 struct p9_rclunk {
 };

 struct p9_tremove {
 	u32 fid;
 };

 struct p9_rremove {
 };

 struct p9_tstat {
 	u32 fid;
 };

 struct p9_rstat {
 	struct p9_stat stat;
 };

 struct p9_twstat {
 	u32 fid;
 	struct p9_stat stat;
 };

 struct p9_rwstat {
 };

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

 struct p9_fcall {
 	u32 size;
 	u8 id;
 	u16 tag;
 	void *sdata;

 	union {
 		struct p9_tversion tversion;
 		struct p9_rversion rversion;
 		struct p9_tauth tauth;
 		struct p9_rauth rauth;
 		struct p9_rerror rerror;
 		struct p9_tflush tflush;
 		struct p9_rflush rflush;
 		struct p9_tattach tattach;
 		struct p9_rattach rattach;
 		struct p9_twalk twalk;
 		struct p9_rwalk rwalk;
 		struct p9_topen topen;
 		struct p9_ropen ropen;
 		struct p9_tcreate tcreate;
 		struct p9_rcreate rcreate;
 		struct p9_tread tread;
 		struct p9_rread rread;
 		struct p9_twrite twrite;
 		struct p9_rwrite rwrite;
 		struct p9_tclunk tclunk;
 		struct p9_rclunk rclunk;
 		struct p9_tremove tremove;
 		struct p9_rremove rremove;
 		struct p9_tstat tstat;
 		struct p9_rstat rstat;
 		struct p9_twstat twstat;
 		struct p9_rwstat rwstat;
 	} params;
 };

 struct p9_idpool;

 int p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat,
 	int dotu);
 int p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *fc, int dotu);
 void p9_set_tag(struct p9_fcall *fc, u16 tag);
 struct p9_fcall *p9_create_tversion(u32 msize, char *version);
 struct p9_fcall *p9_create_tattach(u32 fid, u32 afid, char *uname,
 	char *aname, u32 n_uname, int dotu);
 struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname,
 	u32 n_uname, int dotu);
 struct p9_fcall *p9_create_tflush(u16 oldtag);
 struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
 	char **wnames);
 struct p9_fcall *p9_create_topen(u32 fid, u8 mode);
 struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
 	char *extension, int dotu);
 struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count);
 struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count,
 	const char *data);
 struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count,
 	const char __user *data);
 struct p9_fcall *p9_create_tclunk(u32 fid);
 struct p9_fcall *p9_create_tremove(u32 fid);
 struct p9_fcall *p9_create_tstat(u32 fid);
 struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat,
 	int dotu);

 int p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int dotu);
 int p9_errstr2errno(char *errstr, int len);

 struct p9_idpool *p9_idpool_create(void);
 void p9_idpool_destroy(struct p9_idpool *);
 int p9_idpool_get(struct p9_idpool *p);
 void p9_idpool_put(int id, struct p9_idpool *p);
 int p9_idpool_check(int id, struct p9_idpool *p);

 int p9_error_init(void);
 int p9_errstr2errno(char *, int);
 #endif /* NET_9P_H */
	/*
	* include/net/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
	*
	*/

	#ifndef NET_9P_H
	#define NET_9P_H

	#ifdef CONFIG_NET_9P_DEBUG

	#define P9_DEBUG_ERROR (1<<0)
	#define P9_DEBUG_9P (1<<2)
	#define P9_DEBUG_VFS (1<<3)
	#define P9_DEBUG_CONV (1<<4)
	#define P9_DEBUG_MUX (1<<5)
	#define P9_DEBUG_TRANS (1<<6)
	#define P9_DEBUG_SLABS (1<<7)
	#define P9_DEBUG_FCALL (1<<8)

	extern unsigned int p9_debug_level;

	#define P9_DPRINTK(level, format, arg...) \
	do { \
	if ((p9_debug_level & level) == level) \
	printk(KERN_NOTICE "-- %s (%d): " \
	format , __FUNCTION__, task_pid_nr(current) , ## arg); \
	} while (0)

	#define PRINT_FCALL_ERROR(s, fcall) P9_DPRINTK(P9_DEBUG_ERROR, \
	"%s: %.*s\n", s, fcall?fcall->params.rerror.error.len:0, \
	fcall?fcall->params.rerror.error.str:"");

	#else
	#define P9_DPRINTK(level, format, arg...) do { } while (0)
	#define PRINT_FCALL_ERROR(s, fcall) do { } while (0)
	#endif

	#define P9_EPRINTK(level, format, arg...) \
	do { \
	printk(level "9p: %s (%d): " \
	format , __FUNCTION__, task_pid_nr(current), ## arg); \
	} while (0)


	/* Message Types */
	enum {
	P9_TVERSION = 100,
	P9_RVERSION,
	P9_TAUTH = 102,
	P9_RAUTH,
	P9_TATTACH = 104,
	P9_RATTACH,
	P9_TERROR = 106,
	P9_RERROR,
	P9_TFLUSH = 108,
	P9_RFLUSH,
	P9_TWALK = 110,
	P9_RWALK,
	P9_TOPEN = 112,
	P9_ROPEN,
	P9_TCREATE = 114,
	P9_RCREATE,
	P9_TREAD = 116,
	P9_RREAD,
	P9_TWRITE = 118,
	P9_RWRITE,
	P9_TCLUNK = 120,
	P9_RCLUNK,
	P9_TREMOVE = 122,
	P9_RREMOVE,
	P9_TSTAT = 124,
	P9_RSTAT,
	P9_TWSTAT = 126,
	P9_RWSTAT,
	};

	/* open modes */
	enum {
	P9_OREAD = 0x00,
	P9_OWRITE = 0x01,
	P9_ORDWR = 0x02,
	P9_OEXEC = 0x03,
	P9_OEXCL = 0x04,
	P9_OTRUNC = 0x10,
	P9_OREXEC = 0x20,
	P9_ORCLOSE = 0x40,
	P9_OAPPEND = 0x80,
	};

	/* permissions */
	enum {
	P9_DMDIR = 0x80000000,
	P9_DMAPPEND = 0x40000000,
	P9_DMEXCL = 0x20000000,
	P9_DMMOUNT = 0x10000000,
	P9_DMAUTH = 0x08000000,
	P9_DMTMP = 0x04000000,
	P9_DMSYMLINK = 0x02000000,
	P9_DMLINK = 0x01000000,
	/* 9P2000.u extensions */
	P9_DMDEVICE = 0x00800000,
	P9_DMNAMEDPIPE = 0x00200000,
	P9_DMSOCKET = 0x00100000,
	P9_DMSETUID = 0x00080000,
	P9_DMSETGID = 0x00040000,
	};

	/* qid.types */
	enum {
	P9_QTDIR = 0x80,
	P9_QTAPPEND = 0x40,
	P9_QTEXCL = 0x20,
	P9_QTMOUNT = 0x10,
	P9_QTAUTH = 0x08,
	P9_QTTMP = 0x04,
	P9_QTSYMLINK = 0x02,
	P9_QTLINK = 0x01,
	P9_QTFILE = 0x00,
	};

	#define P9_NOTAG (u16)(~0)
	#define P9_NOFID (u32)(~0)
	#define P9_MAXWELEM 16

	/* ample room for Twrite/Rread header */
	#define P9_IOHDRSZ 24

	struct p9_str {
	u16 len;
	char *str;
	};

	/* qids are the unique ID for a file (like an inode */
	struct p9_qid {
	u8 type;
	u32 version;
	u64 path;
	};

	/* Plan 9 file metadata (stat) structure */
	struct p9_stat {
	u16 size;
	u16 type;
	u32 dev;
	struct p9_qid qid;
	u32 mode;
	u32 atime;
	u32 mtime;
	u64 length;
	struct p9_str name;
	struct p9_str uid;
	struct p9_str gid;
	struct p9_str muid;
	struct p9_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 p9_stat, but the strings don't point to
	the same memory block and should be freed separately
	*/
	struct p9_wstat {
	u16 size;
	u16 type;
	u32 dev;
	struct p9_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 p9_tversion {
	u32 msize;
	struct p9_str version;
	};

	struct p9_rversion {
	u32 msize;
	struct p9_str version;
	};

	struct p9_tauth {
	u32 afid;
	struct p9_str uname;
	struct p9_str aname;
	u32 n_uname; /* 9P2000.u extensions */
	};

	struct p9_rauth {
	struct p9_qid qid;
	};

	struct p9_rerror {
	struct p9_str error;
	u32 errno; /* 9p2000.u extension */
	};

	struct p9_tflush {
	u16 oldtag;
	};

	struct p9_rflush {
	};

	struct p9_tattach {
	u32 fid;
	u32 afid;
	struct p9_str uname;
	struct p9_str aname;
	u32 n_uname; /* 9P2000.u extensions */
	};

	struct p9_rattach {
	struct p9_qid qid;
	};

	struct p9_twalk {
	u32 fid;
	u32 newfid;
	u16 nwname;
	struct p9_str wnames[16];
	};

	struct p9_rwalk {
	u16 nwqid;
	struct p9_qid wqids[16];
	};

	struct p9_topen {
	u32 fid;
	u8 mode;
	};

	struct p9_ropen {
	struct p9_qid qid;
	u32 iounit;
	};

	struct p9_tcreate {
	u32 fid;
	struct p9_str name;
	u32 perm;
	u8 mode;
	struct p9_str extension;
	};

	struct p9_rcreate {
	struct p9_qid qid;
	u32 iounit;
	};

	struct p9_tread {
	u32 fid;
	u64 offset;
	u32 count;
	};

	struct p9_rread {
	u32 count;
	u8 *data;
	};

	struct p9_twrite {
	u32 fid;
	u64 offset;
	u32 count;
	u8 *data;
	};

	struct p9_rwrite {
	u32 count;
	};

	struct p9_tclunk {
	u32 fid;
	};

	struct p9_rclunk {
	};

	struct p9_tremove {
	u32 fid;
	};

	struct p9_rremove {
	};

	struct p9_tstat {
	u32 fid;
	};

	struct p9_rstat {
	struct p9_stat stat;
	};

	struct p9_twstat {
	u32 fid;
	struct p9_stat stat;
	};

	struct p9_rwstat {
	};

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

	struct p9_fcall {
	u32 size;
	u8 id;
	u16 tag;
	void *sdata;

	union {
	struct p9_tversion tversion;
	struct p9_rversion rversion;
	struct p9_tauth tauth;
	struct p9_rauth rauth;
	struct p9_rerror rerror;
	struct p9_tflush tflush;
	struct p9_rflush rflush;
	struct p9_tattach tattach;
	struct p9_rattach rattach;
	struct p9_twalk twalk;
	struct p9_rwalk rwalk;
	struct p9_topen topen;
	struct p9_ropen ropen;
	struct p9_tcreate tcreate;
	struct p9_rcreate rcreate;
	struct p9_tread tread;
	struct p9_rread rread;
	struct p9_twrite twrite;
	struct p9_rwrite rwrite;
	struct p9_tclunk tclunk;
	struct p9_rclunk rclunk;
	struct p9_tremove tremove;
	struct p9_rremove rremove;
	struct p9_tstat tstat;
	struct p9_rstat rstat;
	struct p9_twstat twstat;
	struct p9_rwstat rwstat;
	} params;
	};

	struct p9_idpool;

	int p9_deserialize_stat(void buf, u32 buflen, struct p9_stat stat,
	int dotu);
	int p9_deserialize_fcall(void buf, u32 buflen, struct p9_fcall fc, int dotu);
	void p9_set_tag(struct p9_fcall *fc, u16 tag);
	struct p9_fcall p9_create_tversion(u32 msize, char version);
	struct p9_fcall p9_create_tattach(u32 fid, u32 afid, char uname,
	char *aname, u32 n_uname, int dotu);
	struct p9_fcall p9_create_tauth(u32 afid, char uname, char *aname,
	u32 n_uname, int dotu);
	struct p9_fcall *p9_create_tflush(u16 oldtag);
	struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
	char **wnames);
	struct p9_fcall *p9_create_topen(u32 fid, u8 mode);
	struct p9_fcall p9_create_tcreate(u32 fid, char name, u32 perm, u8 mode,
	char *extension, int dotu);
	struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count);
	struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count,
	const char *data);
	struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count,
	const char __user *data);
	struct p9_fcall *p9_create_tclunk(u32 fid);
	struct p9_fcall *p9_create_tremove(u32 fid);
	struct p9_fcall *p9_create_tstat(u32 fid);
	struct p9_fcall p9_create_twstat(u32 fid, struct p9_wstat wstat,
	int dotu);

	int p9_printfcall(char buf, int buflen, struct p9_fcall fc, int dotu);
	int p9_errstr2errno(char *errstr, int len);

	struct p9_idpool *p9_idpool_create(void);
	void p9_idpool_destroy(struct p9_idpool *);
	int p9_idpool_get(struct p9_idpool *p);
	void p9_idpool_put(int id, struct p9_idpool *p);
	int p9_idpool_check(int id, struct p9_idpool *p);

	int p9_error_init(void);
	int p9_errstr2errno(char *, int);
	#endif /* NET_9P_H */