9p: Reorganization of 9p file system code

This patchset moves non-filesystem interfaces of v9fs from fs/9p to net/9p.
It moves the transport, packet marshalling and connection layers to net/9p
leaving only the VFS related files in fs/9p.  This work is being done in
preparation for in-kernel 9p servers as well as alternate 9p clients (other
than VFS).

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

36 files changed, 3423 insertions, 3131 deletions

diff --git a/fs/9p/9p.h b/fs/9p/9p.h
deleted file mode 100644
index 94e2f92ab2e8..000000000000
--- a/fs/9p/9p.h
+++ /dev/null
@@ -1,375 +0,0 @@
-/*
- * 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);
diff --git a/fs/9p/Makefile b/fs/9p/Makefile
index 87897f84dfb6..bc7f0d1551e6 100644
--- a/fs/9p/Makefile
+++ b/fs/9p/Makefile
@@ -1,18 +1,12 @@
 obj-$(CONFIG_9P_FS) := 9p.o
 
 9p-objs := \
-	trans_fd.o \
-	mux.o \
-	fcall.o \
-	conv.o \
 	vfs_super.o \
 	vfs_inode.o \
 	vfs_addr.o \
 	vfs_file.o \
 	vfs_dir.o \
 	vfs_dentry.o \
-	error.o \
 	v9fs.o \
 	fid.o \
-	fcprint.o
 
diff --git a/fs/9p/conv.h b/fs/9p/conv.h
deleted file mode 100644
index dd5b6b1b610f..000000000000
--- a/fs/9p/conv.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * linux/fs/9p/conv.h
- *
- * 9P protocol conversion 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
- *
- */
-
-int v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
-	int extended);
-int v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
-	int extended);
-
-void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag);
-
-struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version);
-struct v9fs_fcall *v9fs_create_tattach(u32 fid, u32 afid, char *uname,
-	char *aname);
-struct v9fs_fcall *v9fs_create_tflush(u16 oldtag);
-struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
-	char **wnames);
-struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode);
-struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
-	char *extension, int extended);
-struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count);
-struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
-	const char __user *data);
-struct v9fs_fcall *v9fs_create_tclunk(u32 fid);
-struct v9fs_fcall *v9fs_create_tremove(u32 fid);
-struct v9fs_fcall *v9fs_create_tstat(u32 fid);
-struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
-	int extended);
diff --git a/fs/9p/debug.h b/fs/9p/debug.h
deleted file mode 100644
index 4228c0bb3c32..000000000000
--- a/fs/9p/debug.h
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- *  linux/fs/9p/debug.h - V9FS Debug Definitions
- *
- *  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
- *
- */
-
-#define DEBUG_ERROR		(1<<0)
-#define DEBUG_CURRENT		(1<<1)
-#define DEBUG_9P	        (1<<2)
-#define DEBUG_VFS	        (1<<3)
-#define DEBUG_CONV		(1<<4)
-#define DEBUG_MUX		(1<<5)
-#define DEBUG_TRANS		(1<<6)
-#define DEBUG_SLABS	      	(1<<7)
-#define DEBUG_FCALL		(1<<8)
-
-#define DEBUG_DUMP_PKT		0
-
-extern int v9fs_debug_level;
-
-#define dprintk(level, format, arg...) \
-do {  \
-	if((v9fs_debug_level & level)==level) \
-		printk(KERN_NOTICE "-- %s (%d): " \
-		format , __FUNCTION__, current->pid , ## arg); \
-} while(0)
-
-#define eprintk(level, format, arg...) \
-do { \
-	printk(level "v9fs: %s (%d): " \
-		format , __FUNCTION__, current->pid , ## arg); \
-} while(0)
-
-#if DEBUG_DUMP_PKT
-static inline void dump_data(const unsigned char *data, unsigned int datalen)
-{
-	int i, n;
-	char buf[5*8];
-
-	n = 0;
-	i = 0;
-	while (i < datalen) {
-		n += snprintf(buf+n, sizeof(buf)-n, "%02x", data[i++]);
-		if (i%4 == 0)
-			n += snprintf(buf+n, sizeof(buf)-n, " ");
-
-		if (i%16 == 0) {
-			dprintk(DEBUG_ERROR, "%s\n", buf);
-			n = 0;
-		}
-	}
-
-	dprintk(DEBUG_ERROR, "%s\n", buf);
-}
-#else				/* DEBUG_DUMP_PKT */
-static inline void dump_data(const unsigned char *data, unsigned int datalen)
-{
-
-}
-#endif				/* DEBUG_DUMP_PKT */
diff --git a/fs/9p/error.c b/fs/9p/error.c
deleted file mode 100644
index 0d7fa4e08812..000000000000
--- a/fs/9p/error.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * linux/fs/9p/error.c
- *
- * Error string handling
- *
- * Plan 9 uses error strings, Unix uses error numbers.  These functions
- * try to help manage that and provide for dynamically adding error
- * mappings.
- *
- *  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
- *
- */
-
-#include <linux/module.h>
-
-#include <linux/list.h>
-#include <linux/jhash.h>
-
-#include "debug.h"
-#include "error.h"
-
-/**
- * v9fs_error_init - preload
- * @errstr: error string
- *
- */
-
-int v9fs_error_init(void)
-{
-	struct errormap *c;
-	int bucket;
-
-	/* initialize hash table */
-	for (bucket = 0; bucket < ERRHASHSZ; bucket++)
-		INIT_HLIST_HEAD(&hash_errmap[bucket]);
-
-	/* load initial error map into hash table */
-	for (c = errmap; c->name != NULL; c++) {
-		c->namelen = strlen(c->name);
-		bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
-		INIT_HLIST_NODE(&c->list);
-		hlist_add_head(&c->list, &hash_errmap[bucket]);
-	}
-
-	return 1;
-}
-
-/**
- * errstr2errno - convert error string to error number
- * @errstr: error string
- *
- */
-
-int v9fs_errstr2errno(char *errstr, int len)
-{
-	int errno = 0;
-	struct hlist_node *p = NULL;
-	struct errormap *c = NULL;
-	int bucket = jhash(errstr, len, 0) % ERRHASHSZ;
-
-	hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
-		if (c->namelen==len && !memcmp(c->name, errstr, len)) {
-			errno = c->val;
-			break;
-		}
-	}
-
-	if (errno == 0) {
-		/* TODO: if error isn't found, add it dynamically */
-		errstr[len] = 0;
-		printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,
-		       errstr);
-		errno = 1;
-	}
-
-	return -errno;
-}
diff --git a/fs/9p/fcall.c b/fs/9p/fcall.c
deleted file mode 100644
index dc336a67592f..000000000000
--- a/fs/9p/fcall.c
+++ /dev/null
@@ -1,427 +0,0 @@
-/*
- *  linux/fs/9p/fcall.c
- *
- *  This file contains functions to perform synchronous 9P calls
- *
- *  Copyright (C) 2004 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
- *
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/idr.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
-#include "mux.h"
-
-/**
- * v9fs_t_version - negotiate protocol parameters with sever
- * @v9ses: 9P2000 session information
- * @msize: requested max size packet
- * @version: requested version.extension string
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
-	       char *version, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "msize: %d version: %s\n", msize, version);
-	tc = v9fs_create_tversion(msize, version);
-
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_attach - mount the server
- * @v9ses: 9P2000 session information
- * @uname: user name doing the attach
- * @aname: remote name being attached to
- * @fid: mount fid to attatch to root node
- * @afid: authentication fid (in this case result key)
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
-	      u32 fid, u32 afid, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall* tc;
-
-	dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname,
-		aname, fid, afid);
-
-	tc = v9fs_create_tattach(fid, afid, uname, aname);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
-	struct v9fs_fcall *rc, int err)
-{
-	int fid, id;
-	struct v9fs_session_info *v9ses;
-
-	id = 0;
-	fid = tc->params.tclunk.fid;
-	if (rc)
-		id = rc->id;
-
-	kfree(tc);
-	kfree(rc);
-	if (id == RCLUNK) {
-		v9ses = a;
-		v9fs_put_idpool(fid, &v9ses->fidpool);
-	}
-}
-
-/**
- * v9fs_t_clunk - release a fid (finish a transaction)
- * @v9ses: 9P2000 session information
- * @fid: fid to release
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
-{
-	int ret;
-	struct v9fs_fcall *tc, *rc;
-
-	dprintk(DEBUG_9P, "fid %d\n", fid);
-
-	rc = NULL;
-	tc = v9fs_create_tclunk(fid);
-	if (!IS_ERR(tc))
-		ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
-	else
-		ret = PTR_ERR(tc);
-
-	if (ret)
-		dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret);
-
-	v9fs_t_clunk_cb(v9ses, tc, rc, ret);
-	return ret;
-}
-
-#if 0
-/**
- * v9fs_v9fs_t_flush - flush a pending transaction
- * @v9ses: 9P2000 session information
- * @tag: tag to release
- *
- */
-int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "oldtag %d\n", oldtag);
-
-	tc = v9fs_create_tflush(oldtag);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, NULL);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-#endif
-
-/**
- * v9fs_t_stat - read a file's meta-data
- * @v9ses: 9P2000 session information
- * @fid: fid pointing to file or directory to get info about
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d\n", fid);
-
-	ret = -ENOMEM;
-	tc = v9fs_create_tstat(fid);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_wstat - write a file's meta-data
- * @v9ses: 9P2000 session information
- * @fid: fid pointing to file or directory to write info about
- * @stat: metadata
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
-	     struct v9fs_wstat *wstat, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d\n", fid);
-
-	tc = v9fs_create_twstat(fid, wstat, v9ses->extended);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_walk - walk a fid to a new file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to walk
- * @newfid: new fid (for clone operations)
- * @name: path to walk fid to
- * @fcall: pointer to response fcall
- *
- */
-
-/* TODO: support multiple walk */
-
-int
-v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
-	    char *name, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-	int nwname;
-
-	dprintk(DEBUG_9P, "fid %d newfid %d wname '%s'\n", fid, newfid, name);
-
-	if (name)
-		nwname = 1;
-	else
-		nwname = 0;
-
-	tc = v9fs_create_twalk(fid, newfid, nwname, &name);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_open - open a file
- *
- * @v9ses - 9P2000 session information
- * @fid - fid to open
- * @mode - mode to open file (R, RW, etc)
- * @fcall - pointer to response fcall
- *
- */
-
-int
-v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
-	    struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode);
-
-	tc = v9fs_create_topen(fid, mode);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_remove - remove a file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to remove
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
-	      struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d\n", fid);
-
-	tc = v9fs_create_tremove(fid);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_create - create a file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to create
- * @name: name of the file or directory to create
- * @perm: permissions to create with
- * @mode: mode to open file (R, RW, etc)
- * @fcall: pointer to response fcall