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9p: Reorganization of 9p file system code

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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>
This commit is contained in:
Latchesar Ionkov 2007-07-10 17:57:28 -05:00 committed by Eric Van Hensbergen
parent 8d9107e8c5
commit bd238fb431
36 changed files with 3422 additions and 3130 deletions
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375
fs/9p/9p.h
View file

@ -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);

6
fs/9p/Makefile
View file

@ -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

50
fs/9p/conv.h
View file

@ -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);

77
fs/9p/debug.h
View file

@ -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 */

93
fs/9p/error.c
View file

@ -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;
}

427
fs/9p/fcall.c
View file

@ -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
*
*/
int
v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name, u32 perm,
u8 mode, char *extension, struct v9fs_fcall **rcp)
{
int ret;
struct v9fs_fcall *tc;
dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n",
fid, name, perm, mode);
tc = v9fs_create_tcreate(fid, name, perm, mode, extension,
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_read - read data
* @v9ses: 9P2000 session information
* @fid: fid to read from
* @offset: offset to start read at
* @count: how many bytes to read
* @fcall: pointer to response fcall (with data)
*
*/
int
v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
u32 count, struct v9fs_fcall **rcp)
{
int ret;
struct v9fs_fcall *tc, *rc;
dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
(long long unsigned) offset, count);
tc = v9fs_create_tread(fid, offset, count);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
if (!ret)
ret = rc->params.rread.count;
if (rcp)
*rcp = rc;
else
kfree(rc);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}
/**
* v9fs_t_write - write data
* @v9ses: 9P2000 session information
* @fid: fid to write to
* @offset: offset to start write at
* @count: how many bytes to write
* @fcall: pointer to response fcall
*
*/
int
v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count,
const char __user *data, struct v9fs_fcall **rcp)
{
int ret;
struct v9fs_fcall *tc, *rc;
dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
(long long unsigned) offset, count);
tc = v9fs_create_twrite(fid, offset, count, data);
if (!IS_ERR(tc)) {
ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
if (!ret)
ret = rc->params.rwrite.count;
if (rcp)
*rcp = rc;
else
kfree(rc);
kfree(tc);
} else
ret = PTR_ERR(tc);
return ret;
}

166
fs/9p/fid.c
View file

@ -26,10 +26,10 @@
#include <linux/sched.h>
#include <linux/idr.h>
#include <asm/semaphore.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
@ -40,69 +40,31 @@
*
*/
int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
{
struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
dprintk(DEBUG_9P, "fid %d (%p) dentry %s (%p)\n", fid->fid, fid,
dentry->d_iname, dentry);
if (dentry->d_fsdata == NULL) {
dentry->d_fsdata =
kmalloc(sizeof(struct list_head), GFP_KERNEL);
if (dentry->d_fsdata == NULL) {
dprintk(DEBUG_ERROR, "Out of memory\n");
struct v9fs_dentry *dent;
P9_DPRINTK(P9_DEBUG_VFS, "fid %d dentry %s\n",
fid->fid, dentry->d_iname);
dent = dentry->d_fsdata;
if (!dent) {
dent = kmalloc(sizeof(struct v9fs_dentry), GFP_KERNEL);
if (!dent)
return -ENOMEM;
}
fid_list = (struct list_head *)dentry->d_fsdata;
INIT_LIST_HEAD(fid_list); /* Initialize list head */
spin_lock_init(&dent->lock);
INIT_LIST_HEAD(&dent->fidlist);
dentry->d_fsdata = dent;
}
fid->uid = current->uid;
list_add(&fid->list, fid_list);
spin_lock(&dent->lock);
list_add(&fid->dlist, &dent->fidlist);
spin_unlock(&dent->lock);
return 0;
}
/**
* v9fs_fid_create - allocate a FID structure
* @dentry - dentry to link newly created fid to
*
*/
struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *v9ses, int fid)
{
struct v9fs_fid *new;
dprintk(DEBUG_9P, "fid create fid %d\n", fid);
new = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
if (new == NULL) {
dprintk(DEBUG_ERROR, "Out of Memory\n");
return ERR_PTR(-ENOMEM);
}
new->fid = fid;
new->v9ses = v9ses;
new->fidopen = 0;
new->fidclunked = 0;
new->iounit = 0;
new->rdir_pos = 0;
new->rdir_fcall = NULL;
init_MUTEX(&new->lock);
INIT_LIST_HEAD(&new->list);
return new;
}
/**
* v9fs_fid_destroy - deallocate a FID structure
* @fid: fid to destroy
*
*/
void v9fs_fid_destroy(struct v9fs_fid *fid)
{
list_del(&fid->list);
kfree(fid);
}
/**
* v9fs_fid_lookup - return a locked fid from a dentry
* @dentry: dentry to look for fid in
@ -114,27 +76,39 @@ void v9fs_fid_destroy(struct v9fs_fid *fid)
*
*/
struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
{
struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
struct v9fs_fid *return_fid = NULL;
struct v9fs_dentry *dent;
struct p9_fid *fid;
dprintk(DEBUG_9P, " dentry: %s (%p)\n", dentry->d_iname, dentry);
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
dent = dentry->d_fsdata;
if (dent)
fid = list_entry(dent->fidlist.next, struct p9_fid, dlist);
else
fid = ERR_PTR(-EBADF);
if (fid_list)
return_fid = list_entry(fid_list->next, struct v9fs_fid, list);
if (!return_fid) {
dprintk(DEBUG_ERROR, "Couldn't find a fid in dentry\n");
return_fid = ERR_PTR(-EBADF);
P9_DPRINTK(P9_DEBUG_VFS, " fid: %p\n", fid);
return fid;
}
if(down_interruptible(&return_fid->lock))
return ERR_PTR(-EINTR);
struct p9_fid *v9fs_fid_lookup_remove(struct dentry *dentry)
{
struct p9_fid *fid;
struct v9fs_dentry *dent;
return return_fid;
dent = dentry->d_fsdata;
fid = v9fs_fid_lookup(dentry);
if (!IS_ERR(fid)) {
spin_lock(&dent->lock);
list_del(&fid->dlist);
spin_unlock(&dent->lock);
}
return fid;
}
/**
* v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and
* release it
@ -146,49 +120,15 @@ struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
*
*/
struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry)
struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
struct v9fs_fid *base_fid, *new_fid = ERR_PTR(-EBADF);
struct v9fs_fcall *fcall = NULL;
int fid, err;
struct p9_fid *ofid, *fid;
base_fid = v9fs_fid_lookup(dentry);
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
ofid = v9fs_fid_lookup(dentry);
if (IS_ERR(ofid))
return ofid;
if(IS_ERR(base_fid))
return base_fid;
if(base_fid) { /* clone fid */
fid = v9fs_get_idpool(&v9ses->fidpool);
if (fid < 0) {
eprintk(KERN_WARNING, "newfid fails!\n");
new_fid = ERR_PTR(-ENOSPC);
goto Release_Fid;
}
err = v9fs_t_walk(v9ses, base_fid->fid, fid, NULL, &fcall);
if (err < 0) {
dprintk(DEBUG_ERROR, "clone walk didn't work\n");
v9fs_put_idpool(fid, &v9ses->fidpool);
new_fid = ERR_PTR(err);
goto Free_Fcall;
}
new_fid = v9fs_fid_create(v9ses, fid);
if (new_fid == NULL) {
dprintk(DEBUG_ERROR, "out of memory\n");
new_fid = ERR_PTR(-ENOMEM);
}
Free_Fcall:
kfree(fcall);
}
Release_Fid:
up(&base_fid->lock);
return new_fid;
}
void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid)
{
v9fs_t_clunk(v9ses, fid->fid);
v9fs_fid_destroy(fid);
fid = p9_client_walk(ofid, 0, NULL, 1);
return fid;
}

43
fs/9p/fid.h
View file

@ -22,41 +22,12 @@
#include <linux/list.h>
#define FID_OP 0
#define FID_WALK 1
#define FID_CREATE 2
struct v9fs_fid {
struct list_head list; /* list of fids associated with a dentry */
struct list_head active; /* XXX - debug */
struct semaphore lock;
u32 fid;
unsigned char fidopen; /* set when fid is opened */
unsigned char fidclunked; /* set when fid has already been clunked */
struct v9fs_qid qid;
u32 iounit;
/* readdir stuff */
int rdir_fpos;
loff_t rdir_pos;
struct v9fs_fcall *rdir_fcall;
/* management stuff */
uid_t uid; /* user associated with this fid */
/* private data */
struct file *filp; /* backpointer to File struct for open files */
struct v9fs_session_info *v9ses; /* session info for this FID */
struct v9fs_dentry {
spinlock_t lock; /* protect fidlist */
struct list_head fidlist;
};
struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry);
struct v9fs_fid *v9fs_fid_get_created(struct dentry *);
void v9fs_fid_destroy(struct v9fs_fid *fid);
struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *, int fid);
int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry);
struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry);
void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid);
struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
struct p9_fid *v9fs_fid_lookup_remove(struct dentry *dentry);
struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);

308
fs/9p/trans_fd.c
View file

@ -1,308 +0,0 @@
/*
* linux/fs/9p/trans_fd.c
*
* Fd transport layer. Includes deprecated socket layer.
*
* Copyright (C) 2006 by Russ Cox <rsc@swtch.com>
* Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
*
* 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/in.h>
#include <linux/module.h>
#include <linux/net.h>
#include <linux/ipv6.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/un.h>
#include <asm/uaccess.h>
#include <linux/inet.h>
#include <linux/idr.h>
#include <linux/file.h>
#include "debug.h"
#include "v9fs.h"
#include "transport.h"
#define V9FS_PORT 564
struct v9fs_trans_fd {
struct file *rd;
struct file *wr;
};
/**
* v9fs_fd_read- read from a fd
* @v9ses: session information
* @v: buffer to receive data into
* @len: size of receive buffer
*
*/
static int v9fs_fd_read(struct v9fs_transport *trans, void *v, int len)
{
int ret;
struct v9fs_trans_fd *ts;
if (!trans || trans->status == Disconnected || !(ts = trans->priv))
return -EREMOTEIO;
if (!(ts->rd->f_flags & O_NONBLOCK))
dprintk(DEBUG_ERROR, "blocking read ...\n");
ret = kernel_read(ts->rd, ts->rd->f_pos, v, len);
if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
trans->status = Disconnected;
return ret;
}
/**
* v9fs_fd_write - write to a socket
* @v9ses: session information
* @v: buffer to send data from
* @len: size of send buffer
*
*/
static int v9fs_fd_write(struct v9fs_transport *trans, void *v, int len)
{
int ret;
mm_segment_t oldfs;
struct v9fs_trans_fd *ts;
if (!trans || trans->status == Disconnected || !(ts = trans->priv))
return -EREMOTEIO;
if (!(ts->wr->f_flags & O_NONBLOCK))
dprintk(DEBUG_ERROR, "blocking write ...\n");
oldfs = get_fs();
set_fs(get_ds());
/* The cast to a user pointer is valid due to the set_fs() */
ret = vfs_write(ts->wr, (void __user *)v, len, &ts->wr->f_pos);
set_fs(oldfs);
if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
trans->status = Disconnected;
return ret;
}
static unsigned int
v9fs_fd_poll(struct v9fs_transport *trans, struct poll_table_struct *pt)
{
int ret, n;
struct v9fs_trans_fd *ts;
mm_segment_t oldfs;
if (!trans || trans->status != Connected || !(ts = trans->priv))
return -EREMOTEIO;
if (!ts->rd->f_op || !ts->rd->f_op->poll)
return -EIO;
if (!ts->wr->f_op || !ts->wr->f_op->poll)
return -EIO;
oldfs = get_fs();
set_fs(get_ds());
ret = ts->rd->f_op->poll(ts->rd, pt);
if (ret < 0)
goto end;
if (ts->rd != ts->wr) {
n = ts->wr->f_op->poll(ts->wr, pt);
if (n < 0) {
ret = n;
goto end;
}
ret = (ret & ~POLLOUT) | (n & ~POLLIN);
}
end:
set_fs(oldfs);
return ret;
}
static int v9fs_fd_open(struct v9fs_session_info *v9ses, int rfd, int wfd)
{
struct v9fs_transport *trans = v9ses->transport;
struct v9fs_trans_fd *ts = kmalloc(sizeof(struct v9fs_trans_fd),
GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->rd = fget(rfd);
ts->wr = fget(wfd);
if (!ts->rd || !ts->wr) {
if (ts->rd)
fput(ts->rd);
if (ts->wr)
fput(ts->wr);
kfree(ts);
return -EIO;
}
trans->priv = ts;
trans->status = Connected;
return 0;
}
static int v9fs_fd_init(struct v9fs_session_info *v9ses, const char *addr,
char *data)
{
if (v9ses->rfdno == ~0 || v9ses->wfdno == ~0) {
printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
return -ENOPROTOOPT;
}
return v9fs_fd_open(v9ses, v9ses->rfdno, v9ses->wfdno);
}
static int v9fs_socket_open(struct v9fs_session_info *v9ses,
struct socket *csocket)
{
int fd, ret;
csocket->sk->sk_allocation = GFP_NOIO;
if ((fd = sock_map_fd(csocket)) < 0) {
eprintk(KERN_ERR, "v9fs_socket_open: failed to map fd\n");
ret = fd;
release_csocket:
sock_release(csocket);
return ret;
}
if ((ret = v9fs_fd_open(v9ses, fd, fd)) < 0) {
sockfd_put(csocket);
eprintk(KERN_ERR, "v9fs_socket_open: failed to open fd\n");
goto release_csocket;
}
((struct v9fs_trans_fd *)v9ses->transport->priv)->rd->f_flags |=
O_NONBLOCK;
return 0;
}
static int v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr,
char *data)
{
int ret;
struct socket *csocket = NULL;
struct sockaddr_in sin_server;
sin_server.sin_family = AF_INET;
sin_server.sin_addr.s_addr = in_aton(addr);
sin_server.sin_port = htons(v9ses->port);
sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
if (!csocket) {
eprintk(KERN_ERR, "v9fs_trans_tcp: problem creating socket\n");
return -1;
}
ret = csocket->ops->connect(csocket,
(struct sockaddr *)&sin_server,
sizeof(struct sockaddr_in), 0);
if (ret < 0) {
eprintk(KERN_ERR,
"v9fs_trans_tcp: problem connecting socket to %s\n",
addr);
return ret;
}
return v9fs_socket_open(v9ses, csocket);
}
static int
v9fs_unix_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
{
int ret;
struct socket *csocket;
struct sockaddr_un sun_server;
if (strlen(addr) > UNIX_PATH_MAX) {
eprintk(KERN_ERR, "v9fs_trans_unix: address too long: %s\n",
addr);
return -ENAMETOOLONG;
}
sun_server.sun_family = PF_UNIX;
strcpy(sun_server.sun_path, addr);
sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
ret = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
sizeof(struct sockaddr_un) - 1, 0);
if (ret < 0) {
eprintk(KERN_ERR,
"v9fs_trans_unix: problem connecting socket: %s: %d\n",
addr, ret);
return ret;
}
return v9fs_socket_open(v9ses, csocket);
}
/**
* v9fs_sock_close - shutdown socket
* @trans: private socket structure
*
*/
static void v9fs_fd_close(struct v9fs_transport *trans)
{
struct v9fs_trans_fd *ts;
if (!trans)
return;
ts = xchg(&trans->priv, NULL);
if (!ts)
return;
trans->status = Disconnected;
if (ts->rd)
fput(ts->rd);
if (ts->wr)
fput(ts->wr);
kfree(ts);
}
struct v9fs_transport v9fs_trans_fd = {
.init = v9fs_fd_init,
.write = v9fs_fd_write,
.read = v9fs_fd_read,
.close = v9fs_fd_close,
.poll = v9fs_fd_poll,
};
struct v9fs_transport v9fs_trans_tcp = {
.init = v9fs_tcp_init,
.write = v9fs_fd_write,
.read = v9fs_fd_read,
.close = v9fs_fd_close,
.poll = v9fs_fd_poll,
};
struct v9fs_transport v9fs_trans_unix = {
.init = v9fs_unix_init,
.write = v9fs_fd_write,
.read = v9fs_fd_read,
.close = v9fs_fd_close,
.poll = v9fs_fd_poll,
};

288
fs/9p/v9fs.c
View file

@ -29,16 +29,12 @@
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/idr.h>
#include "debug.h"
#include <net/9p/9p.h>
#include <net/9p/transport.h>
#include <net/9p/conn.h>
#include <net/9p/client.h>
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "transport.h"
#include "mux.h"
/* TODO: sysfs or debugfs interface */
int v9fs_debug_level = 0; /* feature-rific global debug level */
/*
* Option Parsing (code inspired by NFS code)
@ -47,12 +43,12 @@ int v9fs_debug_level = 0; /* feature-rific global debug level */
enum {
/* Options that take integer arguments */
Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid, Opt_debug,
Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid,
Opt_rfdno, Opt_wfdno,
/* String options */
Opt_uname, Opt_remotename,
/* Options that take no arguments */
Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd,
Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd, Opt_pci,
/* Cache options */
Opt_cache_loose,
/* Error token */
@ -67,12 +63,14 @@ static match_table_t tokens = {
{Opt_afid, "afid=%u"},
{Opt_rfdno, "rfdno=%u"},
{Opt_wfdno, "wfdno=%u"},
{Opt_debug, "debug=%x"},
{Opt_uname, "uname=%s"},
{Opt_remotename, "aname=%s"},
{Opt_unix, "proto=unix"},
{Opt_tcp, "proto=tcp"},
{Opt_fd, "proto=fd"},
#ifdef CONFIG_PCI_9P
{Opt_pci, "proto=pci"},
#endif
{Opt_tcp, "tcp"},
{Opt_unix, "unix"},
{Opt_fd, "fd"},
@ -83,6 +81,8 @@ static match_table_t tokens = {
{Opt_err, NULL}
};
extern struct p9_transport *p9pci_trans_create(void);
/*
* Parse option string.
*/
@ -122,7 +122,7 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
token = match_token(p, tokens, args);
if (token < Opt_uname) {
if ((ret = match_int(&args[0], &option)) < 0) {
dprintk(DEBUG_ERROR,
P9_DPRINTK(P9_DEBUG_ERROR,
"integer field, but no integer?\n");
continue;
}
@ -149,15 +149,15 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
case Opt_wfdno:
v9ses->wfdno = option;
break;
case Opt_debug:
v9ses->debug = option;
break;
case Opt_tcp:
v9ses->proto = PROTO_TCP;
break;
case Opt_unix:
v9ses->proto = PROTO_UNIX;
break;
case Opt_pci:
v9ses->proto = PROTO_PCI;
break;
case Opt_fd:
v9ses->proto = PROTO_FD;
break;
@ -182,82 +182,6 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
}
}
/**
* v9fs_inode2v9ses - safely extract v9fs session info from super block
* @inode: inode to extract information from
*
* Paranoid function to extract v9ses information from superblock,
* if anything is missing it will report an error.
*
*/
struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
{
return (inode->i_sb->s_fs_info);
}
/**
* v9fs_get_idpool - allocate numeric id from pool
* @p - pool to allocate from
*
* XXX - This seems to be an awful generic function, should it be in idr.c with
* the lock included in struct idr?
*/
int v9fs_get_idpool(struct v9fs_idpool *p)
{
int i = 0;
int error;
retry:
if (idr_pre_get(&p->pool, GFP_KERNEL) == 0)
return 0;
if (down_interruptible(&p->lock) == -EINTR) {
eprintk(KERN_WARNING, "Interrupted while locking\n");
return -1;
}
/* no need to store exactly p, we just need something non-null */
error = idr_get_new(&p->pool, p, &i);
up(&p->lock);
if (error == -EAGAIN)
goto retry;
else if (error)
return -1;
return i;
}
/**
* v9fs_put_idpool - release numeric id from pool
* @p - pool to allocate from
*
* XXX - This seems to be an awful generic function, should it be in idr.c with
* the lock included in struct idr?
*/
void v9fs_put_idpool(int id, struct v9fs_idpool *p)
{
if (down_interruptible(&p->lock) == -EINTR) {
eprintk(KERN_WARNING, "Interrupted while locking\n");
return;
}
idr_remove(&p->pool, id);
up(&p->lock);
}
/**
* v9fs_check_idpool - check if the specified id is available
* @id - id to check
* @p - pool
*/
int v9fs_check_idpool(int id, struct v9fs_idpool *p)
{
return idr_find(&p->pool, id) != NULL;
}
/**
* v9fs_session_init - initialize session
* @v9ses: session information structure
@ -266,25 +190,21 @@ int v9fs_check_idpool(int id, struct v9fs_idpool *p)
*
*/
int
v9fs_session_init(struct v9fs_session_info *v9ses,
struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
const char *dev_name, char *data)
{
struct v9fs_fcall *fcall = NULL;
struct v9fs_transport *trans_proto;
int n = 0;
int newfid = -1;
int retval = -EINVAL;
struct v9fs_str *version;
struct p9_transport *trans;
struct p9_fid *fid;
v9ses->name = __getname();
if (!v9ses->name)
return -ENOMEM;
return ERR_PTR(-ENOMEM);
v9ses->remotename = __getname();
if (!v9ses->remotename) {
__putname(v9ses->name);
return -ENOMEM;
return ERR_PTR(-ENOMEM);
}
strcpy(v9ses->name, V9FS_DEFUSER);
@ -292,130 +212,60 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
v9fs_parse_options(data, v9ses);
/* set global debug level */
v9fs_debug_level = v9ses->debug;
/* id pools that are session-dependent: fids and tags */
idr_init(&v9ses->fidpool.pool);
init_MUTEX(&v9ses->fidpool.lock);
switch (v9ses->proto) {
case PROTO_TCP:
trans_proto = &v9fs_trans_tcp;
trans = p9_trans_create_tcp(dev_name, v9ses->port);
break;
case PROTO_UNIX:
trans_proto = &v9fs_trans_unix;
trans = p9_trans_create_unix(dev_name);
*v9ses->remotename = 0;
break;
case PROTO_FD:
trans_proto = &v9fs_trans_fd;
trans = p9_trans_create_fd(v9ses->rfdno, v9ses->wfdno);
*v9ses->remotename = 0;
break;
#ifdef CONFIG_PCI_9P
case PROTO_PCI:
trans = p9pci_trans_create();
*v9ses->remotename = 0;
break;
#endif
default:
printk(KERN_ERR "v9fs: Bad mount protocol %d\n", v9ses->proto);
retval = -ENOPROTOOPT;
goto SessCleanUp;
goto error;
};
v9ses->transport = kmalloc(sizeof(*v9ses->transport), GFP_KERNEL);
if (!v9ses->transport) {
retval = -ENOMEM;
goto SessCleanUp;
if (IS_ERR(trans)) {
retval = PTR_ERR(trans);
trans = NULL;
goto error;
}
memmove(v9ses->transport, trans_proto, sizeof(*v9ses->transport));
v9ses->clnt = p9_client_create(trans, v9ses->maxdata + P9_IOHDRSZ,
v9ses->extended);
if ((retval = v9ses->transport->init(v9ses, dev_name, data)) < 0) {
eprintk(KERN_ERR, "problem initializing transport\n");
goto SessCleanUp;
if (IS_ERR(v9ses->clnt)) {
retval = PTR_ERR(v9ses->clnt);
v9ses->clnt = NULL;
P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n");
goto error;
}
v9ses->inprogress = 0;
v9ses->shutdown = 0;
v9ses->session_hung = 0;
v9ses->mux = v9fs_mux_init(v9ses->transport, v9ses->maxdata + V9FS_IOHDRSZ,
&v9ses->extended);
if (IS_ERR(v9ses->mux)) {
retval = PTR_ERR(v9ses->mux);
v9ses->mux = NULL;
dprintk(DEBUG_ERROR, "problem initializing mux\n");
goto SessCleanUp;
fid = p9_client_attach(v9ses->clnt, NULL, v9ses->name,
v9ses->remotename);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
fid = NULL;
P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n");
goto error;
}
if (v9ses->afid == ~0) {
if (v9ses->extended)
retval =
v9fs_t_version(v9ses, v9ses->maxdata, "9P2000.u",
&fcall);
else
retval = v9fs_t_version(v9ses, v9ses->maxdata, "9P2000",
&fcall);
return fid;
if (retval < 0) {
dprintk(DEBUG_ERROR, "v9fs_t_version failed\n");
goto FreeFcall;
}
version = &fcall->params.rversion.version;
if (version->len==8 && !memcmp(version->str, "9P2000.u", 8)) {
dprintk(DEBUG_9P, "9P2000 UNIX extensions enabled\n");
v9ses->extended = 1;
} else if (version->len==6 && !memcmp(version->str, "9P2000", 6)) {
dprintk(DEBUG_9P, "9P2000 legacy mode enabled\n");
v9ses->extended = 0;
} else {
retval = -EREMOTEIO;
goto FreeFcall;
}
n = fcall->params.rversion.msize;
kfree(fcall);
if (n < v9ses->maxdata)
v9ses->maxdata = n;
}
newfid = v9fs_get_idpool(&v9ses->fidpool);
if (newfid < 0) {
eprintk(KERN_WARNING, "couldn't allocate FID\n");
retval = -ENOMEM;
goto SessCleanUp;
}
/* it is a little bit ugly, but we have to prevent newfid */
/* being the same as afid, so if it is, get a new fid */
if (v9ses->afid != ~0 && newfid == v9ses->afid) {
newfid = v9fs_get_idpool(&v9ses->fidpool);
if (newfid < 0) {
eprintk(KERN_WARNING, "couldn't allocate FID\n");
retval = -ENOMEM;
goto SessCleanUp;
}
}
if ((retval =
v9fs_t_attach(v9ses, v9ses->name, v9ses->remotename, newfid,
v9ses->afid, NULL))
< 0) {
dprintk(DEBUG_ERROR, "cannot attach\n");
goto SessCleanUp;
}
if (v9ses->afid != ~0) {
dprintk(DEBUG_ERROR, "afid not equal to ~0\n");
if (v9fs_t_clunk(v9ses, v9ses->afid))
dprintk(DEBUG_ERROR, "clunk failed\n");
}
return newfid;
FreeFcall:
kfree(fcall);
SessCleanUp:
error:
v9fs_session_close(v9ses);
return retval;
return ERR_PTR(retval);
}
/**
@ -426,15 +276,9 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
void v9fs_session_close(struct v9fs_session_info *v9ses)
{
if (v9ses->mux) {
v9fs_mux_destroy(v9ses->mux);
v9ses->mux = NULL;
}
if (v9ses->transport) {
v9ses->transport->close(v9ses->transport);
kfree(v9ses->transport);
v9ses->transport = NULL;
if (v9ses->clnt) {
p9_client_destroy(v9ses->clnt);
v9ses->clnt = NULL;
}
__putname(v9ses->name);
@ -446,9 +290,8 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
* and cancel all pending requests.
*/
void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
dprintk(DEBUG_ERROR, "cancel session %p\n", v9ses);
v9ses->transport->status = Disconnected;
v9fs_mux_cancel(v9ses->mux, -EIO);
P9_DPRINTK(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
p9_client_disconnect(v9ses->clnt);
}
extern int v9fs_error_init(void);
@ -460,24 +303,9 @@ extern int v9fs_error_init(void);
static int __init init_v9fs(void)
{
int ret;
v9fs_error_init();
printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
ret = v9fs_mux_global_init();
if (ret) {
printk(KERN_WARNING "v9fs: starting mux failed\n");
return ret;
}
ret = register_filesystem(&v9fs_fs_type);
if (ret) {
printk(KERN_WARNING "v9fs: registering file system failed\n");
v9fs_mux_global_exit();
}
return ret;
return register_filesystem(&v9fs_fs_type);
}
/**
@ -487,13 +315,13 @@ static int __init init_v9fs(void)
static void __exit exit_v9fs(void)
{
v9fs_mux_global_exit();
unregister_filesystem(&v9fs_fs_type);
}
module_init(init_v9fs)
module_exit(exit_v9fs)
MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
MODULE_LICENSE("GPL");

32
fs/9p/v9fs.h
View file

@ -21,16 +21,6 @@
*
*/
/*
* Idpool structure provides lock and id management
*
*/
struct v9fs_idpool {
struct semaphore lock;
struct idr pool;
};
/*
* Session structure provides information for an opened session
*
@ -54,15 +44,7 @@ struct v9fs_session_info {
unsigned int uid; /* default uid/muid for legacy support */
unsigned int gid; /* default gid for legacy support */
/* book keeping */
struct v9fs_idpool fidpool; /* The FID pool for file descriptors */
struct v9fs_transport *transport;
struct v9fs_mux_data *mux;
int inprogress; /* session in progress => true */
int shutdown; /* session shutting down. no more attaches. */
unsigned char session_hung;
struct p9_client *clnt; /* 9p client */
struct dentry *debugfs_dir;
};
@ -71,6 +53,7 @@ enum {
PROTO_TCP,
PROTO_UNIX,
PROTO_FD,
PROTO_PCI,
};
/* possible values of ->cache */
@ -82,12 +65,9 @@ enum {
extern struct dentry *v9fs_debugfs_root;
int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
char *);
void v9fs_session_close(struct v9fs_session_info *v9ses);
int v9fs_get_idpool(struct v9fs_idpool *p);
void v9fs_put_idpool(int id, struct v9fs_idpool *p);
int v9fs_check_idpool(int id, struct v9fs_idpool *p);
void v9fs_session_cancel(struct v9fs_session_info *v9ses);
#define V9FS_MAGIC 0x01021997
@ -97,3 +77,7 @@ void v9fs_session_cancel(struct v9fs_session_info *v9ses);
#define V9FS_DEFUSER "nobody"
#define V9FS_DEFANAME ""
static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
{
return (inode->i_sb->s_fs_info);
}

6
fs/9p/v9fs_vfs.h
View file

@ -45,10 +45,10 @@ extern struct dentry_operations v9fs_dentry_operations;
extern struct dentry_operations v9fs_cached_dentry_operations;
struct inode *v9fs_get_inode(struct super_block *sb, int mode);
ino_t v9fs_qid2ino(struct v9fs_qid *qid);
void v9fs_stat2inode(struct v9fs_stat *, struct inode *, struct super_block *);
ino_t v9fs_qid2ino(struct p9_qid *qid);
void v9fs_stat2inode(struct p9_stat *, struct inode *, struct super_block *);
int v9fs_dir_release(struct inode *inode, struct file *filp);
int v9fs_file_open(struct inode *inode, struct file *file);
void v9fs_inode2stat(struct inode *inode, struct v9fs_stat *stat);
void v9fs_inode2stat(struct inode *inode, struct p9_stat *stat);
void v9fs_dentry_release(struct dentry *);
int v9fs_uflags2omode(int uflags);

57
fs/9p/vfs_addr.c
View file

@ -33,10 +33,10 @@
#include <linux/pagemap.h>
#include <linux/idr.h>
#include <linux/sched.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
@ -50,55 +50,26 @@
static int v9fs_vfs_readpage(struct file *filp, struct page *page)
{
char *buffer = NULL;
int retval = -EIO;
loff_t offset = page_offset(page);
int count = PAGE_CACHE_SIZE;
struct inode *inode = filp->f_path.dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
int rsize = v9ses->maxdata - V9FS_IOHDRSZ;
struct v9fs_fid *v9f = filp->private_data;
struct v9fs_fcall *fcall = NULL;
int fid = v9f->fid;
int total = 0;
int result = 0;
dprintk(DEBUG_VFS, "\n");
int retval;
loff_t offset;
char *buffer;
struct p9_fid *fid;
P9_DPRINTK(P9_DEBUG_VFS, "\n");
fid = filp->private_data;
buffer = kmap(page);
do {
if (count < rsize)
rsize = count;
offset = page_offset(page);
result = v9fs_t_read(v9ses, fid, offset, rsize, &fcall);
retval = p9_client_readn(fid, buffer, offset, PAGE_CACHE_SIZE);
if (retval < 0)
goto done;
if (result < 0) {
printk(KERN_ERR "v9fs_t_read returned %d\n",
result);
kfree(fcall);
goto UnmapAndUnlock;
} else
offset += result;
memcpy(buffer, fcall->params.rread.data, result);
count -= result;
buffer += result;
total += result;
kfree(fcall);
if (result < rsize)
break;
} while (count);
memset(buffer, 0, count);
memset(buffer + retval, 0, PAGE_CACHE_SIZE - retval);
flush_dcache_page(page);
SetPageUptodate(page);
retval = 0;
UnmapAndUnlock:
done:
kunmap(page);
unlock_page(page);
return retval;

35
fs/9p/vfs_dentry.c
View file

@ -34,10 +34,10 @@
#include <linux/namei.h>
#include <linux/idr.h>
#include <linux/sched.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
@ -52,7 +52,7 @@
static int v9fs_dentry_delete(struct dentry *dentry)
{
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
return 1;
}
@ -69,7 +69,7 @@ static int v9fs_dentry_delete(struct dentry *dentry)
static int v9fs_cached_dentry_delete(struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
if(!inode)
return 1;
@ -85,26 +85,19 @@ static int v9fs_cached_dentry_delete(struct dentry *dentry)
void v9fs_dentry_release(struct dentry *dentry)
{
int err;
struct v9fs_dentry *dent;
struct p9_fid *temp, *current_fid;
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
if (dentry->d_fsdata != NULL) {
struct list_head *fid_list = dentry->d_fsdata;
struct v9fs_fid *temp = NULL;
struct v9fs_fid *current_fid = NULL;
list_for_each_entry_safe(current_fid, temp, fid_list, list) {
err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid);
if (err < 0)
dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n",
err, dentry->d_iname);
v9fs_fid_destroy(current_fid);
P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
dent = dentry->d_fsdata;
if (dent) {
list_for_each_entry_safe(current_fid, temp, &dent->fidlist,
dlist) {
p9_client_clunk(current_fid);
}
kfree(dentry->d_fsdata); /* free the list_head */
kfree(dent);
dentry->d_fsdata = NULL;
}
}

147
fs/9p/vfs_dir.c
View file

@ -32,11 +32,10 @@
#include <linux/sched.h>
#include <linux/inet.h>
#include <linux/idr.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "conv.h"
#include "v9fs_vfs.h"
#include "fid.h"
@ -46,14 +45,14 @@
*
*/
static inline int dt_type(struct v9fs_stat *mistat)
static inline int dt_type(struct p9_stat *mistat)
{
unsigned long perm = mistat->mode;
int rettype = DT_REG;
if (perm & V9FS_DMDIR)
if (perm & P9_DMDIR)
rettype = DT_DIR;
if (perm & V9FS_DMSYMLINK)
if (perm & P9_DMSYMLINK)
rettype = DT_LNK;
return rettype;
@ -69,105 +68,35 @@ static inline int dt_type(struct v9fs_stat *mistat)
static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct v9fs_fcall *fcall = NULL;
struct inode *inode = filp->f_path.dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
struct v9fs_fid *file = filp->private_data;
unsigned int i, n, s;
int fid = -1;
int ret = 0;
struct v9fs_stat stat;
int over = 0;
int over;
struct p9_fid *fid;
struct v9fs_session_info *v9ses;
struct inode *inode;
struct p9_stat *st;
dprintk(DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
inode = filp->f_path.dentry->d_inode;
v9ses = v9fs_inode2v9ses(inode);
fid = filp->private_data;
while ((st = p9_client_dirread(fid, filp->f_pos)) != NULL) {
if (IS_ERR(st))
return PTR_ERR(st);
fid = file->fid;
over = filldir(dirent, st->name.str, st->name.len, filp->f_pos,
v9fs_qid2ino(&st->qid), dt_type(st));
if (file->rdir_fcall && (filp->f_pos != file->rdir_pos)) {
kfree(file->rdir_fcall);
file->rdir_fcall = NULL;
}
if (file->rdir_fcall) {
n = file->rdir_fcall->params.rread.count;
i = file->rdir_fpos;
while (i < n) {
s = v9fs_deserialize_stat(
file->rdir_fcall->params.rread.data + i,
n - i, &stat, v9ses->extended);
if (s == 0) {
dprintk(DEBUG_ERROR,
"error while deserializing stat\n");
ret = -EIO;
goto FreeStructs;
}
over = filldir(dirent, stat.name.str, stat.name.len,
filp->f_pos, v9fs_qid2ino(&stat.qid),
dt_type(&stat));
if (over) {
file->rdir_fpos = i;
file->rdir_pos = filp->f_pos;
break;
}
i += s;
filp->f_pos += s;
}
if (!over) {
kfree(file->rdir_fcall);
file->rdir_fcall = NULL;
}
}
while (!over) {
ret = v9fs_t_read(v9ses, fid, filp->f_pos,
v9ses->maxdata-V9FS_IOHDRSZ, &fcall);
if (ret < 0) {
dprintk(DEBUG_ERROR, "error while reading: %d: %p\n",
ret, fcall);
goto FreeStructs;
} else if (ret == 0)
if (over)
break;
n = ret;
i = 0;
while (i < n) {
s = v9fs_deserialize_stat(fcall->params.rread.data + i,
n - i, &stat, v9ses->extended);
if (s == 0) {
dprintk(DEBUG_ERROR,
"error while deserializing stat\n");
return -EIO;
filp->f_pos += st->size;
kfree(st);
st = NULL;
}
over = filldir(dirent, stat.name.str, stat.name.len,
filp->f_pos, v9fs_qid2ino(&stat.qid),
dt_type(&stat));
if (over) {
file->rdir_fcall = fcall;
file->rdir_fpos = i;
file->rdir_pos = filp->f_pos;
fcall = NULL;
break;
kfree(st);
return 0;
}
i += s;
filp->f_pos += s;
}
kfree(fcall);
}
FreeStructs:
kfree(fcall);
return ret;
}
/**
* v9fs_dir_release - close a directory
@ -178,29 +107,13 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
int v9fs_dir_release(struct inode *inode, struct file *filp)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
struct v9fs_fid *fid = filp->private_data;
int fidnum = -1;
dprintk(DEBUG_VFS, "inode: %p filp: %p fid: %d\n", inode, filp,
fid->fid);
fidnum = fid->fid;
struct p9_fid *fid;
fid = filp->private_data;
P9_DPRINTK(P9_DEBUG_VFS,
"inode: %p filp: %p fid: %d\n", inode, filp, fid->fid);
filemap_write_and_wait(inode->i_mapping);
if (fidnum >= 0) {
dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen,
fid->fid);
if (v9fs_t_clunk(v9ses, fidnum))
dprintk(DEBUG_ERROR, "clunk failed\n");
kfree(fid->rdir_fcall);
kfree(fid);
filp->private_data = NULL;
}
p9_client_clunk(fid);
return 0;
}

160
fs/9p/vfs_file.c
View file

@ -34,10 +34,10 @@
#include <linux/list.h>
#include <asm/uaccess.h>
#include <linux/idr.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
@ -52,48 +52,36 @@ static const struct file_operations v9fs_cached_file_operations;
int v9fs_file_open(struct inode *inode, struct file *file)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
struct v9fs_fid *vfid;
struct v9fs_fcall *fcall = NULL;
int omode;
int err;
struct v9fs_session_info *v9ses;
struct p9_fid *fid;
int omode;
dprintk(DEBUG_VFS, "inode: %p file: %p \n", inode, file);
vfid = v9fs_fid_clone(file->f_path.dentry);
if (IS_ERR(vfid))
return PTR_ERR(vfid);
P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p \n", inode, file);
v9ses = v9fs_inode2v9ses(inode);
omode = v9fs_uflags2omode(file->f_flags);
err = v9fs_t_open(v9ses, vfid->fid, omode, &fcall);
fid = file->private_data;
if (!fid) {
fid = v9fs_fid_clone(file->f_path.dentry);
if (IS_ERR(fid))
return PTR_ERR(fid);
err = p9_client_open(fid, omode);
if (err < 0) {
PRINT_FCALL_ERROR("open failed", fcall);
goto Clunk_Fid;
p9_client_clunk(fid);
return err;
}
}
file->private_data = vfid;
vfid->fidopen = 1;
vfid->fidclunked = 0;
vfid->iounit = fcall->params.ropen.iounit;
vfid->rdir_pos = 0;
vfid->rdir_fcall = NULL;
vfid->filp = file;
kfree(fcall);
if((vfid->qid.version) && (v9ses->cache)) {
dprintk(DEBUG_VFS, "cached");
file->private_data = fid;
if ((fid->qid.version) && (v9ses->cache)) {
P9_DPRINTK(P9_DEBUG_VFS, "cached");
/* enable cached file options */
if(file->f_op == &v9fs_file_operations)
file->f_op = &v9fs_cached_file_operations;
}
return 0;
Clunk_Fid:
v9fs_fid_clunk(v9ses, vfid);
kfree(fcall);
return err;
}
/**
@ -110,7 +98,7 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
int res = 0;
struct inode *inode = filp->f_path.dentry->d_inode;
dprintk(DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
P9_DPRINTK(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
/* No mandatory locks */
if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
@ -136,55 +124,16 @@ static ssize_t
v9fs_file_read(struct file *filp, char __user * data, size_t count,
loff_t * offset)
{
struct inode *inode = filp->f_path.dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
struct v9fs_fid *v9f = filp->private_data;
struct v9fs_fcall *fcall = NULL;
int fid = v9f->fid;
int rsize = 0;
int result = 0;
int total = 0;
int n;
int ret;
struct p9_fid *fid;
dprintk(DEBUG_VFS, "\n");
P9_DPRINTK(P9_DEBUG_VFS, "\n");
fid = filp->private_data;
ret = p9_client_uread(fid, data, *offset, count);
if (ret > 0)
*offset += ret;
rsize = v9ses->maxdata - V9FS_IOHDRSZ;
if (v9f->iounit != 0 && rsize > v9f->iounit)
rsize = v9f->iounit;
do {
if (count < rsize)
rsize = count;
result = v9fs_t_read(v9ses, fid, *offset, rsize, &fcall);
if (result < 0) {
printk(KERN_ERR "9P2000: v9fs_t_read returned %d\n",
result);
kfree(fcall);
return total;
} else
*offset += result;
n = copy_to_user(data, fcall->params.rread.data, result);
if (n) {
dprintk(DEBUG_ERROR, "Problem copying to user %d\n", n);
kfree(fcall);
return -EFAULT;
}
count -= result;
data += result;
total += result;
kfree(fcall);
if (result < rsize)
break;
} while (count);
return total;
return ret;
}
/**
@ -200,50 +149,19 @@ static ssize_t
v9fs_file_write(struct file *filp, const char __user * data,
size_t count, loff_t * offset)
{
struct inode *inode = filp->f_path.dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
struct v9fs_fid *v9fid = filp->private_data;
struct v9fs_fcall *fcall;
int fid = v9fid->fid;
int result = -EIO;
int rsize = 0;
int total = 0;
int ret;
struct p9_fid *fid;
dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count,
(int)*offset);
rsize = v9ses->maxdata - V9FS_IOHDRSZ;
if (v9fid->iounit != 0 && rsize > v9fid->iounit)
rsize = v9fid->iounit;
P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
(int)count, (int)*offset);
do {
if (count < rsize)
rsize = count;
fid = filp->private_data;
ret = p9_client_uwrite(fid, data, *offset, count);
if (ret > 0)
*offset += ret;
result = v9fs_t_write(v9ses, fid, *offset, rsize, data, &fcall);
if (result < 0) {
PRINT_FCALL_ERROR("error while writing", fcall);
kfree(fcall);
return result;
} else
*offset += result;
kfree(fcall);
fcall = NULL;
if (result != rsize) {
eprintk(KERN_ERR,
"short write: v9fs_t_write returned %d\n",
result);
break;
}
count -= result;
data += result;
total += result;
} while (count);
invalidate_inode_pages2(inode->i_mapping);
return total;
invalidate_inode_pages2(filp->f_path.dentry->d_inode->i_mapping);
return ret;
}
static const struct file_operations v9fs_cached_file_operations = {

749
fs/9p/vfs_inode.c
View file

File diff suppressed because it is too large Load diff

91
fs/9p/vfs_super.c
View file

@ -37,10 +37,10 @@
#include <linux/mount.h>
#include <linux/idr.h>
#include <linux/sched.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
@ -107,41 +107,48 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
struct vfsmount *mnt)
{
struct super_block *sb = NULL;
struct v9fs_fcall *fcall = NULL;
struct inode *inode = NULL;
struct dentry *root = NULL;
struct v9fs_session_info *v9ses = NULL;
struct v9fs_fid *root_fid = NULL;
struct p9_stat *st = NULL;
int mode = S_IRWXUGO | S_ISVTX;
uid_t uid = current->fsuid;
gid_t gid = current->fsgid;
int stat_result = 0;
int newfid = 0;
struct p9_fid *fid;
int retval = 0;
dprintk(DEBUG_VFS, " \n");
P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
return -ENOMEM;
if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
dprintk(DEBUG_ERROR, "problem initiating session\n");
retval = newfid;
goto out_free_session;
fid = v9fs_session_init(v9ses, dev_name, data);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
fid = NULL;
kfree(v9ses);
v9ses = NULL;
goto error;
}
st = p9_client_stat(fid);
if (IS_ERR(st)) {
retval = PTR_ERR(st);
goto error;
}
sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
if (IS_ERR(sb)) {
retval = PTR_ERR(sb);
goto out_close_session;
goto error;
}
v9fs_fill_super(sb, v9ses, flags);
inode = v9fs_get_inode(sb, S_IFDIR | mode);
if (IS_ERR(inode)) {
retval = PTR_ERR(inode);
goto put_back_sb;
goto error;
}
inode->i_uid = uid;
@ -150,54 +157,30 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
root = d_alloc_root(inode);
if (!root) {
retval = -ENOMEM;
goto put_back_sb;
goto error;
}
sb->s_root = root;
stat_result = v9fs_t_stat(v9ses, newfid, &fcall);
if (stat_result < 0) {
dprintk(DEBUG_ERROR, "stat error\n");
v9fs_t_clunk(v9ses, newfid);
} else {
/* Setup the Root Inode */
root_fid = v9fs_fid_create(v9ses, newfid);
if (root_fid == NULL) {
retval = -ENOMEM;
goto put_back_sb;
}
retval = v9fs_fid_insert(root_fid, root);
if (retval < 0) {
kfree(fcall);
goto put_back_sb;
}
root_fid->qid = fcall->params.rstat.stat.qid;
root->d_inode->i_ino =
v9fs_qid2ino(&fcall->params.rstat.stat.qid);
v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb);
}
kfree(fcall);
if (stat_result < 0) {
retval = stat_result;
goto put_back_sb;
}
root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
v9fs_stat2inode(st, root->d_inode, sb);
v9fs_fid_add(root, fid);
return simple_set_mnt(mnt, sb);
out_close_session:
v9fs_session_close(v9ses);
out_free_session:
kfree(v9ses);
return retval;
error:
if (fid)
p9_client_clunk(fid);
put_back_sb:
/* deactivate_super calls v9fs_kill_super which will frees the rest */
if (v9ses) {
v9fs_session_close(v9ses);
kfree(v9ses);
}
if (sb) {
up_write(&sb->s_umount);
deactivate_super(sb);
}
return retval;
}
@ -211,7 +194,7 @@ static void v9fs_kill_super(struct super_block *s)
{
struct v9fs_session_info *v9ses = s->s_fs_info;
dprintk(DEBUG_VFS, " %p\n", s);
P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s);
v9fs_dentry_release(s->s_root); /* clunk root */
@ -219,7 +202,7 @@ static void v9fs_kill_super(struct super_block *s)
v9fs_session_close(v9ses);
kfree(v9ses);
dprintk(DEBUG_VFS, "exiting kill_super\n");
P9_DPRINTK(P9_DEBUG_VFS, "exiting kill_super\n");
}
/**

2
fs/Kconfig
View file

@ -2048,7 +2048,7 @@ config AFS_DEBUG
config 9P_FS
tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
depends on INET && EXPERIMENTAL
depends on INET && NET_9P && EXPERIMENTAL
help
If you say Y here, you will get experimental support for
Plan 9 resource sharing via the 9P2000 protocol.

417
include/net/9p/9p.h Normal file
View file

@ -0,0 +1,417 @@
/*
* 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__, current->pid , ## 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__, current->pid , ## 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;
};
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;
};
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);
struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname);
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);
int __init p9_sysctl_register(void);
void __exit p9_sysctl_unregister(void);
#endif /* NET_9P_H */

80
include/net/9p/client.h Normal file
View file

@ -0,0 +1,80 @@
/*
* include/net/9p/client.h
*
* 9P Client Definitions
*
* Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
*
* 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_CLIENT_H
#define NET_9P_CLIENT_H
struct p9_client {
spinlock_t lock; /* protect client structure */
int msize;
unsigned char dotu;
struct p9_transport *trans;
struct p9_conn *conn;
struct p9_idpool *fidpool;
struct list_head fidlist;
};
struct p9_fid {
struct p9_client *clnt;
u32 fid;
int mode;
struct p9_qid qid;
u32 iounit;
uid_t uid;
void *aux;
int rdir_fpos;
int rdir_pos;
struct p9_fcall *rdir_fcall;
struct list_head flist;
struct list_head dlist; /* list of all fids attached to a dentry */
};
struct p9_client *p9_client_create(struct p9_transport *trans, int msize,
int dotu);
void p9_client_destroy(struct p9_client *clnt);
void p9_client_disconnect(struct p9_client *clnt);
struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
char *uname, char *aname);
struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname);
struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
int clone);
int p9_client_open(struct p9_fid *fid, int mode);
int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
char *extension);
int p9_client_clunk(struct p9_fid *fid);
int p9_client_remove(struct p9_fid *fid);
int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count);
int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count);
int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count);
int p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset,
u32 count);
int p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset,
u32 count);
struct p9_stat *p9_client_stat(struct p9_fid *fid);
int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst);
struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset);
#endif /* NET_9P_CLIENT_H */

42
fs/9p/mux.h → include/net/9p/conn.h
View file

@ -1,7 +1,7 @@
/*
* linux/fs/9p/mux.h
* include/net/9p/conn.h
*
* Multiplexer Definitions
* Connection Definitions
*
* Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
@ -23,33 +23,35 @@
*
*/
struct v9fs_mux_data;
struct v9fs_req;
#ifndef NET_9P_CONN_H
#define NET_9P_CONN_H
#undef P9_NONBLOCK
struct p9_conn;
struct p9_req;
/**
* v9fs_mux_req_callback - callback function that is called when the
* p9_mux_req_callback - callback function that is called when the
* response of a request is received. The callback is called from
* a workqueue and shouldn't block.
*
* @req - request
* @a - the pointer that was specified when the request was send to be
* passed to the callback
* @tc - request call
* @rc - response call
* @err - error code (non-zero if error occured)
*/
typedef void (*v9fs_mux_req_callback)(struct v9fs_req *req, void *a);
typedef void (*p9_conn_req_callback)(struct p9_req *req, void *a);
int v9fs_mux_global_init(void);
void v9fs_mux_global_exit(void);
struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize,
unsigned char *dotu);
void p9_conn_destroy(struct p9_conn *);
int p9_conn_rpc(struct p9_conn *m, struct p9_fcall *tc, struct p9_fcall **rc);
struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
unsigned char *extended);
void v9fs_mux_destroy(struct v9fs_mux_data *);
#ifdef P9_NONBLOCK
int p9_conn_rpcnb(struct p9_conn *m, struct p9_fcall *tc,
p9_conn_req_callback cb, void *a);
#endif /* P9_NONBLOCK */
int v9fs_mux_send(struct v9fs_mux_data *m, struct v9fs_fcall *tc);
struct v9fs_fcall *v9fs_mux_recv(struct v9fs_mux_data *m);
int v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, struct v9fs_fcall **rc);
void p9_conn_cancel(struct p9_conn *m, int err);
void v9fs_mux_flush(struct v9fs_mux_data *m, int sendflush);
void v9fs_mux_cancel(struct v9fs_mux_data *m, int err);
int v9fs_errstr2errno(char *errstr, int len);
#endif /* NET_9P_CONN_H */

28
fs/9p/transport.h → include/net/9p/transport.h
View file

@ -1,5 +1,5 @@
/*
* linux/fs/9p/transport.h
* include/net/9p/transport.h
*
* Transport Definition
*
@ -23,23 +23,27 @@
*
*/
enum v9fs_transport_status {
#ifndef NET_9P_TRANSPORT_H
#define NET_9P_TRANSPORT_H
enum p9_transport_status {
Connected,
Disconnected,
Hung,
};
struct v9fs_transport {
enum v9fs_transport_status status;
struct p9_transport {
enum p9_transport_status status;
void *priv;
int (*init) (struct v9fs_session_info *, const char *, char *);
int (*write) (struct v9fs_transport *, void *, int);
int (*read) (struct v9fs_transport *, void *, int);
void (*close) (struct v9fs_transport *);
unsigned int (*poll)(struct v9fs_transport *, struct poll_table_struct *);
int (*write) (struct p9_transport *, void *, int);
int (*read) (struct p9_transport *, void *, int);
void (*close) (struct p9_transport *);
unsigned int (*poll)(struct p9_transport *, struct poll_table_struct *);
};
extern struct v9fs_transport v9fs_trans_tcp;
extern struct v9fs_transport v9fs_trans_unix;
extern struct v9fs_transport v9fs_trans_fd;
struct p9_transport *p9_trans_create_tcp(const char *addr, int port);
struct p9_transport *p9_trans_create_unix(const char *addr);
struct p9_transport *p9_trans_create_fd(int rfd, int wfd);
#endif /* NET_9P_TRANSPORT_H */

21
net/9p/Kconfig Normal file
View file

@ -0,0 +1,21 @@
#
# 9P protocol configuration
#
menuconfig NET_9P
depends on NET && EXPERIMENTAL
tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
help
If you say Y here, you will get experimental support for
Plan 9 resource sharing via the 9P2000 protocol.
See <http://v9fs.sf.net> for more information.
If unsure, say N.
config NET_9P_DEBUG
bool "Debug information"
depends on NET_9P
help
Say Y if you want the 9P subsistem to log debug information.

13
net/9p/Makefile Normal file
View file

@ -0,0 +1,13 @@
obj-$(CONFIG_NET_9P) := 9p.o
9p-objs := \
mod.o \
trans_fd.o \
mux.o \
client.o \
conv.o \
error.o \
fcprint.o \
util.o \
9p-$(CONFIG_SYSCTL) += sysctl.o

965
net/9p/client.c Normal file
View file

@ -0,0 +1,965 @@
/*
* net/9p/clnt.c
*
* 9P Client
*
* Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
*
* 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/idr.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/uaccess.h>
#include <net/9p/9p.h>
#include <net/9p/transport.h>
#include <net/9p/conn.h>
#include <net/9p/client.h>
static struct p9_fid *p9_fid_create(struct p9_client *clnt);
static void p9_fid_destroy(struct p9_fid *fid);
static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu);
struct p9_client *p9_client_create(struct p9_transport *trans, int msize,
int dotu)
{
int err, n;
struct p9_client *clnt;
struct p9_fcall *tc, *rc;
struct p9_str *version;
err = 0;
tc = NULL;
rc = NULL;
clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
if (!clnt)
return ERR_PTR(-ENOMEM);
P9_DPRINTK(P9_DEBUG_9P, "clnt %p trans %p msize %d dotu %d\n",
clnt, trans, msize, dotu);
spin_lock_init(&clnt->lock);
clnt->trans = trans;
clnt->msize = msize;
clnt->dotu = dotu;
INIT_LIST_HEAD(&clnt->fidlist);
clnt->fidpool = p9_idpool_create();
if (!clnt->fidpool) {
err = PTR_ERR(clnt->fidpool);
clnt->fidpool = NULL;
goto error;
}
clnt->conn = p9_conn_create(clnt->trans, clnt->msize, &clnt->dotu);
if (IS_ERR(clnt->conn)) {
err = PTR_ERR(clnt->conn);
clnt->conn = NULL;
goto error;
}
tc = p9_create_tversion(clnt->msize, clnt->dotu?"9P2000.u":"9P2000");
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
version = &rc->params.rversion.version;
if (version->len == 8 && !memcmp(version->str, "9P2000.u", 8))
clnt->dotu = 1;
else if (version->len == 6 && !memcmp(version->str, "9P2000", 6))
clnt->dotu = 0;
else {
err = -EREMOTEIO;
goto error;
}
n = rc->params.rversion.msize;
if (n < clnt->msize)
clnt->msize = n;
kfree(tc);
kfree(rc);
return clnt;
error:
kfree(tc);
kfree(rc);
p9_client_destroy(clnt);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_create);
void p9_client_destroy(struct p9_client *clnt)
{
struct p9_fid *fid, *fidptr;
P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
if (clnt->conn) {
p9_conn_destroy(clnt->conn);
clnt->conn = NULL;
}
if (clnt->trans) {
clnt->trans->close(clnt->trans);
kfree(clnt->trans);
clnt->trans = NULL;
}
if (clnt->fidpool)
p9_idpool_destroy(clnt->fidpool);
list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist)
p9_fid_destroy(fid);
kfree(clnt);
}
EXPORT_SYMBOL(p9_client_destroy);
void p9_client_disconnect(struct p9_client *clnt)
{
P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
clnt->trans->status = Disconnected;
p9_conn_cancel(clnt->conn, -EIO);
}
EXPORT_SYMBOL(p9_client_disconnect);
struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
char *uname, char *aname)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_fid *fid;
P9_DPRINTK(P9_DEBUG_9P, "clnt %p afid %d uname %s aname %s\n",
clnt, afid?afid->fid:-1, uname, aname);
err = 0;
tc = NULL;
rc = NULL;
fid = p9_fid_create(clnt);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
fid = NULL;
goto error;
}
tc = p9_create_tattach(fid->fid, afid?afid->fid:P9_NOFID, uname, aname);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
memmove(&fid->qid, &rc->params.rattach.qid, sizeof(struct p9_qid));
kfree(tc);
kfree(rc);
return fid;
error:
kfree(tc);
kfree(rc);
if (fid)
p9_fid_destroy(fid);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_attach);
struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_fid *fid;
P9_DPRINTK(P9_DEBUG_9P, "clnt %p uname %s aname %s\n", clnt, uname,
aname);
err = 0;
tc = NULL;
rc = NULL;
fid = p9_fid_create(clnt);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
fid = NULL;
goto error;
}
tc = p9_create_tauth(fid->fid, uname, aname);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
memmove(&fid->qid, &rc->params.rauth.qid, sizeof(struct p9_qid));
kfree(tc);
kfree(rc);
return fid;
error:
kfree(tc);
kfree(rc);
if (fid)
p9_fid_destroy(fid);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_auth);
struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
int clone)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
struct p9_fid *fid;
P9_DPRINTK(P9_DEBUG_9P, "fid %d nwname %d wname[0] %s\n",
oldfid->fid, nwname, wnames?wnames[0]:NULL);
err = 0;
tc = NULL;
rc = NULL;
clnt = oldfid->clnt;
if (clone) {
fid = p9_fid_create(clnt);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
fid = NULL;
goto error;
}
fid->uid = oldfid->uid;
} else
fid = oldfid;
tc = p9_create_twalk(oldfid->fid, fid->fid, nwname, wnames);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err) {
if (rc && rc->id == P9_RWALK)
goto clunk_fid;
else
goto error;
}
if (rc->params.rwalk.nwqid != nwname) {
err = -ENOENT;
goto clunk_fid;
}
if (nwname)
memmove(&fid->qid,
&rc->params.rwalk.wqids[rc->params.rwalk.nwqid - 1],
sizeof(struct p9_qid));
else
fid->qid = oldfid->qid;
kfree(tc);
kfree(rc);
return fid;
clunk_fid:
kfree(tc);
kfree(rc);
rc = NULL;
tc = p9_create_tclunk(fid->fid);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
p9_conn_rpc(clnt->conn, tc, &rc);
error:
kfree(tc);
kfree(rc);
if (fid && (fid != oldfid))
p9_fid_destroy(fid);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_walk);
int p9_client_open(struct p9_fid *fid, int mode)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d mode %d\n", fid->fid, mode);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
if (fid->mode != -1)
return -EINVAL;
tc = p9_create_topen(fid->fid, mode);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto done;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto done;
fid->mode = mode;
fid->iounit = rc->params.ropen.iounit;
done:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_open);
int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
char *extension)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d name %s perm %d mode %d\n", fid->fid,
name, perm, mode);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
if (fid->mode != -1)
return -EINVAL;
tc = p9_create_tcreate(fid->fid, name, perm, mode, extension,
clnt->dotu);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto done;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto done;
fid->mode = mode;
fid->iounit = rc->params.ropen.iounit;
done:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_fcreate);
int p9_client_clunk(struct p9_fid *fid)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
tc = p9_create_tclunk(fid->fid);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto done;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto done;
p9_fid_destroy(fid);
done:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_clunk);
int p9_client_remove(struct p9_fid *fid)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
tc = p9_create_tremove(fid->fid);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto done;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto done;
p9_fid_destroy(fid);
done:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_remove);
int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count)
{
int err, n, rsize, total;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu %d\n", fid->fid,
(long long unsigned) offset, count);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
total = 0;
rsize = fid->iounit;
if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
rsize = clnt->msize - P9_IOHDRSZ;
do {
if (count < rsize)
rsize = count;
tc = p9_create_tread(fid->fid, offset, rsize);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
n = rc->params.rread.count;
if (n > count)
n = count;
memmove(data, rc->params.rread.data, n);
count -= n;
data += n;
offset += n;
total += n;
kfree(tc);
tc = NULL;
kfree(rc);
rc = NULL;
} while (count > 0 && n == rsize);
return total;
error:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_read);
int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count)
{
int err, n, rsize, total;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
(long long unsigned) offset, count);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
total = 0;
rsize = fid->iounit;
if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
rsize = clnt->msize - P9_IOHDRSZ;
do {
if (count < rsize)
rsize = count;
tc = p9_create_twrite(fid->fid, offset, rsize, data);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
n = rc->params.rread.count;
count -= n;
data += n;
offset += n;
total += n;
kfree(tc);
tc = NULL;
kfree(rc);
rc = NULL;
} while (count > 0);
return total;
error:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_write);
int
p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset, u32 count)
{
int err, n, rsize, total;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
(long long unsigned) offset, count);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
total = 0;
rsize = fid->iounit;
if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
rsize = clnt->msize - P9_IOHDRSZ;
do {
if (count < rsize)
rsize = count;
tc = p9_create_tread(fid->fid, offset, rsize);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
n = rc->params.rread.count;
if (n > count)
n = count;
err = copy_to_user(data, rc->params.rread.data, n);
if (err) {
err = -EFAULT;
goto error;
}
count -= n;
data += n;
offset += n;
total += n;
kfree(tc);
tc = NULL;
kfree(rc);
rc = NULL;
} while (count > 0 && n == rsize);
return total;
error:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_uread);
int
p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset,
u32 count)
{
int err, n, rsize, total;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
(long long unsigned) offset, count);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
total = 0;
rsize = fid->iounit;
if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
rsize = clnt->msize - P9_IOHDRSZ;
do {
if (count < rsize)
rsize = count;
tc = p9_create_twrite_u(fid->fid, offset, rsize, data);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
n = rc->params.rread.count;
count -= n;
data += n;
offset += n;
total += n;
kfree(tc);
tc = NULL;
kfree(rc);
rc = NULL;
} while (count > 0);
return total;
error:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_uwrite);
int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count)
{
int n, total;
P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
(long long unsigned) offset, count);
n = 0;
total = 0;
while (count) {
n = p9_client_read(fid, data, offset, count);
if (n <= 0)
break;
data += n;
offset += n;
count -= n;
total += n;
}
if (n < 0)
total = n;
return total;
}
EXPORT_SYMBOL(p9_client_readn);
struct p9_stat *p9_client_stat(struct p9_fid *fid)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
struct p9_stat *ret;
P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
err = 0;
tc = NULL;
rc = NULL;
ret = NULL;
clnt = fid->clnt;
tc = p9_create_tstat(fid->fid);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
ret = p9_clone_stat(&rc->params.rstat.stat, clnt->dotu);
if (IS_ERR(ret)) {
err = PTR_ERR(ret);
ret = NULL;
goto error;
}
kfree(tc);
kfree(rc);
return ret;
error:
kfree(tc);
kfree(rc);
kfree(ret);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_stat);
int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
{
int err;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
err = 0;
tc = NULL;
rc = NULL;
clnt = fid->clnt;
tc = p9_create_twstat(fid->fid, wst, clnt->dotu);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto done;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
done:
kfree(tc);
kfree(rc);
return err;
}
EXPORT_SYMBOL(p9_client_wstat);
struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset)
{
int err, n, m;
struct p9_fcall *tc, *rc;
struct p9_client *clnt;
struct p9_stat st, *ret;
P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu\n", fid->fid,
(long long unsigned) offset);
err = 0;
tc = NULL;
rc = NULL;
ret = NULL;
clnt = fid->clnt;
/* if the offset is below or above the current response, free it */
if (offset < fid->rdir_fpos || (fid->rdir_fcall &&
offset >= fid->rdir_fpos+fid->rdir_fcall->params.rread.count)) {
fid->rdir_pos = 0;
if (fid->rdir_fcall)
fid->rdir_fpos += fid->rdir_fcall->params.rread.count;
kfree(fid->rdir_fcall);
fid->rdir_fcall = NULL;
if (offset < fid->rdir_fpos)
fid->rdir_fpos = 0;
}
if (!fid->rdir_fcall) {
n = fid->iounit;
if (!n || n > clnt->msize-P9_IOHDRSZ)
n = clnt->msize - P9_IOHDRSZ;
while (1) {
if (fid->rdir_fcall) {
fid->rdir_fpos +=
fid->rdir_fcall->params.rread.count;
kfree(fid->rdir_fcall);
fid->rdir_fcall = NULL;
}
tc = p9_create_tread(fid->fid, fid->rdir_fpos, n);
if (IS_ERR(tc)) {
err = PTR_ERR(tc);
tc = NULL;
goto error;
}
err = p9_conn_rpc(clnt->conn, tc, &rc);
if (err)
goto error;
n = rc->params.rread.count;
if (n == 0)
goto done;
fid->rdir_fcall = rc;
rc = NULL;
if (offset >= fid->rdir_fpos &&
offset < fid->rdir_fpos+n)
break;
}
fid->rdir_pos = 0;
}
m = offset - fid->rdir_fpos;
if (m < 0)
goto done;
n = p9_deserialize_stat(fid->rdir_fcall->params.rread.data + m,
fid->rdir_fcall->params.rread.count - m, &st, clnt->dotu);
if (!n) {
err = -EIO;
goto error;
}
fid->rdir_pos += n;
st.size = n;
ret = p9_clone_stat(&st, clnt->dotu);
if (IS_ERR(ret)) {
err = PTR_ERR(ret);
ret = NULL;
goto error;
}
done:
kfree(tc);
kfree(rc);
return ret;
error:
kfree(tc);
kfree(rc);
kfree(ret);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_client_dirread);
static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu)
{
int n;
char *p;
struct p9_stat *ret;
n = sizeof(struct p9_stat) + st->name.len + st->uid.len + st->gid.len +
st->muid.len;
if (dotu)
n += st->extension.len;
ret = kmalloc(n, GFP_KERNEL);
if (!ret)
return ERR_PTR(-ENOMEM);
memmove(ret, st, sizeof(struct p9_stat));
p = ((char *) ret) + sizeof(struct p9_stat);
memmove(p, st->name.str, st->name.len);
p += st->name.len;
memmove(p, st->uid.str, st->uid.len);
p += st->uid.len;
memmove(p, st->gid.str, st->gid.len);
p += st->gid.len;
memmove(p, st->muid.str, st->muid.len);
p += st->muid.len;
if (dotu) {
memmove(p, st->extension.str, st->extension.len);
p += st->extension.len;
}
return ret;
}
static struct p9_fid *p9_fid_create(struct p9_client *clnt)
{
int err;
struct p9_fid *fid;
P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
if (!fid)
return ERR_PTR(-ENOMEM);
fid->fid = p9_idpool_get(clnt->fidpool);
if (fid->fid < 0) {
err = -ENOSPC;
goto error;
}
memset(&fid->qid, 0, sizeof(struct p9_qid));
fid->mode = -1;
fid->rdir_fpos = 0;
fid->rdir_pos = 0;
fid->rdir_fcall = NULL;
fid->uid = current->fsuid;
fid->clnt = clnt;
fid->aux = NULL;
spin_lock(&clnt->lock);
list_add(&fid->flist, &clnt->fidlist);
spin_unlock(&clnt->lock);
return fid;
error:
kfree(fid);
return ERR_PTR(err);
}
static void p9_fid_destroy(struct p9_fid *fid)
{
struct p9_client *clnt;
P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
clnt = fid->clnt;
p9_idpool_put(fid->fid, clnt->fidpool);
spin_lock(&clnt->lock);
list_del(&fid->flist);
spin_unlock(&clnt->lock);
kfree(fid->rdir_fcall);
kfree(fid);
}

402
fs/9p/conv.c → net/9p/conv.c
View file

@ -1,5 +1,5 @@
/*
* linux/fs/9p/conv.c
* net/9p/conv.c
*
* 9P protocol conversion functions
*
@ -29,11 +29,8 @@
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/idr.h>
#include <asm/uaccess.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "conv.h"
#include <linux/uaccess.h>
#include <net/9p/9p.h>
/*
* Buffer to help with string parsing
@ -59,8 +56,9 @@ static int buf_check_size(struct cbuf *buf, int len)
{
if (buf->p + len > buf->ep) {
if (buf->p < buf->ep) {
eprintk(KERN_ERR, "buffer overflow: want %d has %d\n",
len, (int)(buf->ep - buf->p));
P9_EPRINTK(KERN_ERR,
"buffer overflow: want %d has %d\n", len,
(int)(buf->ep - buf->p));
dump_stack();
buf->p = buf->ep + 1;
}
@ -183,7 +181,7 @@ static u64 buf_get_int64(struct cbuf *buf)
return ret;
}
static void buf_get_str(struct cbuf *buf, struct v9fs_str *vstr)
static void buf_get_str(struct cbuf *buf, struct p9_str *vstr)
{
vstr->len = buf_get_int16(buf);
if (!buf_check_overflow(buf) && buf_check_size(buf, vstr->len)) {
@ -195,7 +193,7 @@ static void buf_get_str(struct cbuf *buf, struct v9fs_str *vstr)
}
}
static void buf_get_qid(struct cbuf *bufp, struct v9fs_qid *qid)
static void buf_get_qid(struct cbuf *bufp, struct p9_qid *qid)
{
qid->type = buf_get_int8(bufp);
qid->version = buf_get_int32(bufp);
@ -203,18 +201,18 @@ static void buf_get_qid(struct cbuf *bufp, struct v9fs_qid *qid)
}
/**
* v9fs_size_wstat - calculate the size of a variable length stat struct
* p9_size_wstat - calculate the size of a variable length stat struct
* @stat: metadata (stat) structure
* @extended: non-zero if 9P2000.u
* @dotu: non-zero if 9P2000.u
*
*/
static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended)
static int p9_size_wstat(struct p9_wstat *wstat, int dotu)
{
int size = 0;
if (wstat == NULL) {
eprintk(KERN_ERR, "v9fs_size_stat: got a NULL stat pointer\n");
P9_EPRINTK(KERN_ERR, "p9_size_stat: got a NULL stat pointer\n");
return 0;
}
@ -239,7 +237,7 @@ static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended)
if (wstat->muid)
size += strlen(wstat->muid);
if (extended) {
if (dotu) {
size += 4 + /* n_uid[4] */
4 + /* n_gid[4] */
4 + /* n_muid[4] */
@ -255,12 +253,12 @@ static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended)
* buf_get_stat - safely decode a recieved metadata (stat) structure
* @bufp: buffer to deserialize
* @stat: metadata (stat) structure
* @extended: non-zero if 9P2000.u
* @dotu: non-zero if 9P2000.u
*
*/
static void
buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended)
buf_get_stat(struct cbuf *bufp, struct p9_stat *stat, int dotu)
{
stat->size = buf_get_int16(bufp);
stat->type = buf_get_int16(bufp);
@ -277,7 +275,7 @@ buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended)
buf_get_str(bufp, &stat->gid);
buf_get_str(bufp, &stat->muid);
if (extended) {
if (dotu) {
buf_get_str(bufp, &stat->extension);
stat->n_uid = buf_get_int32(bufp);
stat->n_gid = buf_get_int32(bufp);
@ -286,18 +284,18 @@ buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended)
}
/**
* v9fs_deserialize_stat - decode a received metadata structure
* p9_deserialize_stat - decode a received metadata structure
* @buf: buffer to deserialize
* @buflen: length of received buffer
* @stat: metadata structure to decode into
* @extended: non-zero if 9P2000.u
* @dotu: non-zero if 9P2000.u
*
* Note: stat will point to the buf region.
*/
int
v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
int extended)
p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat,
int dotu)
{
struct cbuf buffer;
struct cbuf *bufp = &buffer;
@ -305,13 +303,14 @@ v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
buf_init(bufp, buf, buflen);
p = bufp->p;
buf_get_stat(bufp, stat, extended);
buf_get_stat(bufp, stat, dotu);
if (buf_check_overflow(bufp))
return 0;
else
return bufp->p - p;
}
EXPORT_SYMBOL(p9_deserialize_stat);
/**
* deserialize_fcall - unmarshal a response
@ -319,13 +318,13 @@ v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
* @buflen: length of received buffer
* @rcall: fcall structure to populate
* @rcalllen: length of fcall structure to populate
* @extended: non-zero if 9P2000.u
* @dotu: non-zero if 9P2000.u
*
*/
int
v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
int extended)
p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *rcall,
int dotu)
{
struct cbuf buffer;
@ -338,102 +337,104 @@ v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
rcall->id = buf_get_int8(bufp);
rcall->tag = buf_get_int16(bufp);
dprintk(DEBUG_CONV, "size %d id %d tag %d\n", rcall->size, rcall->id,
rcall->tag);
P9_DPRINTK(P9_DEBUG_CONV, "size %d id %d tag %d\n", rcall->size,
rcall->id, rcall->tag);
switch (rcall->id) {
default:
eprintk(KERN_ERR, "unknown message type: %d\n", rcall->id);
P9_EPRINTK(KERN_ERR, "unknown message type: %d\n", rcall->id);
return -EPROTO;
case RVERSION:
case P9_RVERSION:
rcall->params.rversion.msize = buf_get_int32(bufp);
buf_get_str(bufp, &rcall->params.rversion.version);
break;
case RFLUSH:
case P9_RFLUSH:
break;
case RATTACH:
case P9_RATTACH:
rcall->params.rattach.qid.type = buf_get_int8(bufp);
rcall->params.rattach.qid.version = buf_get_int32(bufp);
rcall->params.rattach.qid.path = buf_get_int64(bufp);
break;
case RWALK:
case P9_RWALK:
rcall->params.rwalk.nwqid = buf_get_int16(bufp);
if (rcall->params.rwalk.nwqid > V9FS_MAXWELEM) {
eprintk(KERN_ERR, "Rwalk with more than %d qids: %d\n",
V9FS_MAXWELEM, rcall->params.rwalk.nwqid);
if (rcall->params.rwalk.nwqid > P9_MAXWELEM) {
P9_EPRINTK(KERN_ERR,
"Rwalk with more than %d qids: %d\n",
P9_MAXWELEM, rcall->params.rwalk.nwqid);
return -EPROTO;
}
for (i = 0; i < rcall->params.rwalk.nwqid; i++)
buf_get_qid(bufp, &rcall->params.rwalk.wqids[i]);
break;
case ROPEN:
case P9_ROPEN:
buf_get_qid(bufp, &rcall->params.ropen.qid);
rcall->params.ropen.iounit = buf_get_int32(bufp);
break;
case RCREATE:
case P9_RCREATE:
buf_get_qid(bufp, &rcall->params.rcreate.qid);
rcall->params.rcreate.iounit = buf_get_int32(bufp);
break;
case RREAD:
case P9_RREAD:
rcall->params.rread.count = buf_get_int32(bufp);
rcall->params.rread.data = bufp->p;
buf_check_size(bufp, rcall->params.rread.count);
break;
case RWRITE:
case P9_RWRITE:
rcall->params.rwrite.count = buf_get_int32(bufp);
break;
case RCLUNK:
case P9_RCLUNK:
break;
case RREMOVE:
case P9_RREMOVE:
break;
case RSTAT:
case P9_RSTAT:
buf_get_int16(bufp);
buf_get_stat(bufp, &rcall->params.rstat.stat, extended);
buf_get_stat(bufp, &rcall->params.rstat.stat, dotu);
break;
case RWSTAT:
case P9_RWSTAT:
break;
case RERROR:
case P9_RERROR:
buf_get_str(bufp, &rcall->params.rerror.error);
if (extended)
if (dotu)
rcall->params.rerror.errno = buf_get_int16(bufp);
break;
}
if (buf_check_overflow(bufp)) {
dprintk(DEBUG_ERROR, "buffer overflow\n");
P9_DPRINTK(P9_DEBUG_ERROR, "buffer overflow\n");
return -EIO;
}
return bufp->p - bufp->sp;
}
EXPORT_SYMBOL(p9_deserialize_fcall);
static inline void v9fs_put_int8(struct cbuf *bufp, u8 val, u8 * p)
static inline void p9_put_int8(struct cbuf *bufp, u8 val, u8 * p)
{
*p = val;
buf_put_int8(bufp, val);
}
static inline void v9fs_put_int16(struct cbuf *bufp, u16 val, u16 * p)
static inline void p9_put_int16(struct cbuf *bufp, u16 val, u16 * p)
{
*p = val;
buf_put_int16(bufp, val);
}
static inline void v9fs_put_int32(struct cbuf *bufp, u32 val, u32 * p)
static inline void p9_put_int32(struct cbuf *bufp, u32 val, u32 * p)
{
*p = val;
buf_put_int32(bufp, val);
}
static inline void v9fs_put_int64(struct cbuf *bufp, u64 val, u64 * p)
static inline void p9_put_int64(struct cbuf *bufp, u64 val, u64 * p)
{
*p = val;
buf_put_int64(bufp, val);
}
static void
v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str)
p9_put_str(struct cbuf *bufp, char *data, struct p9_str *str)
{
int len;
char *s;
@ -451,7 +452,16 @@ v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str)
}
static int
v9fs_put_user_data(struct cbuf *bufp, const char __user * data, int count,
p9_put_data(struct cbuf *bufp, const char *data, int count,
unsigned char **pdata)
{
*pdata = buf_alloc(bufp, count);
memmove(*pdata, data, count);
return count;
}
static int
p9_put_user_data(struct cbuf *bufp, const char __user *data, int count,
unsigned char **pdata)
{
*pdata = buf_alloc(bufp, count);
@ -459,73 +469,74 @@ v9fs_put_user_data(struct cbuf *bufp, const char __user * data, int count,
}
static void
v9fs_put_wstat(struct cbuf *bufp, struct v9fs_wstat *wstat,
struct v9fs_stat *stat, int statsz, int extended)
p9_put_wstat(struct cbuf *bufp, struct p9_wstat *wstat,
struct p9_stat *stat, int statsz, int dotu)
{
v9fs_put_int16(bufp, statsz, &stat->size);
v9fs_put_int16(bufp, wstat->type, &stat->type);
v9fs_put_int32(bufp, wstat->dev, &stat->dev);
v9fs_put_int8(bufp, wstat->qid.type, &stat->qid.type);
v9fs_put_int32(bufp, wstat->qid.version, &stat->qid.version);
v9fs_put_int64(bufp, wstat->qid.path, &stat->qid.path);
v9fs_put_int32(bufp, wstat->mode, &stat->mode);
v9fs_put_int32(bufp, wstat->atime, &stat->atime);
v9fs_put_int32(bufp, wstat->mtime, &stat->mtime);
v9fs_put_int64(bufp, wstat->length, &stat->length);
p9_put_int16(bufp, statsz, &stat->size);
p9_put_int16(bufp, wstat->type, &stat->type);
p9_put_int32(bufp, wstat->dev, &stat->dev);
p9_put_int8(bufp, wstat->qid.type, &stat->qid.type);
p9_put_int32(bufp, wstat->qid.version, &stat->qid.version);
p9_put_int64(bufp, wstat->qid.path, &stat->qid.path);
p9_put_int32(bufp, wstat->mode, &stat->mode);
p9_put_int32(bufp, wstat->atime, &stat->atime);
p9_put_int32(bufp, wstat->mtime, &stat->mtime);
p9_put_int64(bufp, wstat->length, &stat->length);
v9fs_put_str(bufp, wstat->name, &stat->name);
v9fs_put_str(bufp, wstat->uid, &stat->uid);
v9fs_put_str(bufp, wstat->gid, &stat->gid);
v9fs_put_str(bufp, wstat->muid, &stat->muid);
p9_put_str(bufp, wstat->name, &stat->name);
p9_put_str(bufp, wstat->uid, &stat->uid);
p9_put_str(bufp, wstat->gid, &stat->gid);
p9_put_str(bufp, wstat->muid, &stat->muid);
if (extended) {
v9fs_put_str(bufp, wstat->extension, &stat->extension);
v9fs_put_int32(bufp, wstat->n_uid, &stat->n_uid);
v9fs_put_int32(bufp, wstat->n_gid, &stat->n_gid);
v9fs_put_int32(bufp, wstat->n_muid, &stat->n_muid);
if (dotu) {
p9_put_str(bufp, wstat->extension, &stat->extension);
p9_put_int32(bufp, wstat->n_uid, &stat->n_uid);
p9_put_int32(bufp, wstat->n_gid, &stat->n_gid);
p9_put_int32(bufp, wstat->n_muid, &stat->n_muid);
}
}
static struct v9fs_fcall *
v9fs_create_common(struct cbuf *bufp, u32 size, u8 id)
static struct p9_fcall *
p9_create_common(struct cbuf *bufp, u32 size, u8 id)
{
struct v9fs_fcall *fc;
struct p9_fcall *fc;
size += 4 + 1 + 2; /* size[4] id[1] tag[2] */
fc = kmalloc(sizeof(struct v9fs_fcall) + size, GFP_KERNEL);
fc = kmalloc(sizeof(struct p9_fcall) + size, GFP_KERNEL);
if (!fc)
return ERR_PTR(-ENOMEM);
fc->sdata = (char *)fc + sizeof(*fc);
buf_init(bufp, (char *)fc->sdata, size);
v9fs_put_int32(bufp, size, &fc->size);
v9fs_put_int8(bufp, id, &fc->id);
v9fs_put_int16(bufp, V9FS_NOTAG, &fc->tag);
p9_put_int32(bufp, size, &fc->size);
p9_put_int8(bufp, id, &fc->id);
p9_put_int16(bufp, P9_NOTAG, &fc->tag);
return fc;
}
void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag)
void p9_set_tag(struct p9_fcall *fc, u16 tag)
{
fc->tag = tag;
*(__le16 *) (fc->sdata + 5) = cpu_to_le16(tag);
}
EXPORT_SYMBOL(p9_set_tag);
struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version)
struct p9_fcall *p9_create_tversion(u32 msize, char *version)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4 + 2 + strlen(version); /* msize[4] version[s] */
fc = v9fs_create_common(bufp, size, TVERSION);
fc = p9_create_common(bufp, size, P9_TVERSION);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, msize, &fc->params.tversion.msize);
v9fs_put_str(bufp, version, &fc->params.tversion.version);
p9_put_int32(bufp, msize, &fc->params.tversion.msize);
p9_put_str(bufp, version, &fc->params.tversion.version);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -534,23 +545,24 @@ struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version)
error:
return fc;
}
EXPORT_SYMBOL(p9_create_tversion);
#if 0
struct v9fs_fcall *v9fs_create_tauth(u32 afid, char *uname, char *aname)
struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4 + 2 + strlen(uname) + 2 + strlen(aname); /* afid[4] uname[s] aname[s] */
fc = v9fs_create_common(bufp, size, TAUTH);
/* afid[4] uname[s] aname[s] */
size = 4 + 2 + strlen(uname) + 2 + strlen(aname);
fc = p9_create_common(bufp, size, P9_TAUTH);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, afid, &fc->params.tauth.afid);
v9fs_put_str(bufp, uname, &fc->params.tauth.uname);
v9fs_put_str(bufp, aname, &fc->params.tauth.aname);
p9_put_int32(bufp, afid, &fc->params.tauth.afid);
p9_put_str(bufp, uname, &fc->params.tauth.uname);
p9_put_str(bufp, aname, &fc->params.tauth.aname);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -559,43 +571,45 @@ struct v9fs_fcall *v9fs_create_tauth(u32 afid, char *uname, char *aname)
error:
return fc;
}
#endif /* 0 */
EXPORT_SYMBOL(p9_create_tauth);
struct v9fs_fcall *
v9fs_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
struct p9_fcall *
p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname); /* fid[4] afid[4] uname[s] aname[s] */
fc = v9fs_create_common(bufp, size, TATTACH);
/* fid[4] afid[4] uname[s] aname[s] */
size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname);
fc = p9_create_common(bufp, size, P9_TATTACH);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.tattach.fid);
v9fs_put_int32(bufp, afid, &fc->params.tattach.afid);
v9fs_put_str(bufp, uname, &fc->params.tattach.uname);
v9fs_put_str(bufp, aname, &fc->params.tattach.aname);
p9_put_int32(bufp, fid, &fc->params.tattach.fid);
p9_put_int32(bufp, afid, &fc->params.tattach.afid);
p9_put_str(bufp, uname, &fc->params.tattach.uname);
p9_put_str(bufp, aname, &fc->params.tattach.aname);
error:
return fc;
}
EXPORT_SYMBOL(p9_create_tattach);
struct v9fs_fcall *v9fs_create_tflush(u16 oldtag)
struct p9_fcall *p9_create_tflush(u16 oldtag)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 2; /* oldtag[2] */
fc = v9fs_create_common(bufp, size, TFLUSH);
fc = p9_create_common(bufp, size, P9_TFLUSH);
if (IS_ERR(fc))
goto error;
v9fs_put_int16(bufp, oldtag, &fc->params.tflush.oldtag);
p9_put_int16(bufp, oldtag, &fc->params.tflush.oldtag);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -604,17 +618,18 @@ struct v9fs_fcall *v9fs_create_tflush(u16 oldtag)
error:
return fc;
}
EXPORT_SYMBOL(p9_create_tflush);
struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
char **wnames)
{
int i, size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
if (nwname > V9FS_MAXWELEM) {
dprintk(DEBUG_ERROR, "nwname > %d\n", V9FS_MAXWELEM);
if (nwname > P9_MAXWELEM) {
P9_DPRINTK(P9_DEBUG_ERROR, "nwname > %d\n", P9_MAXWELEM);
return NULL;
}
@ -623,15 +638,15 @@ struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
size += 2 + strlen(wnames[i]); /* wname[s] */
}
fc = v9fs_create_common(bufp, size, TWALK);
fc = p9_create_common(bufp, size, P9_TWALK);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.twalk.fid);
v9fs_put_int32(bufp, newfid, &fc->params.twalk.newfid);
v9fs_put_int16(bufp, nwname, &fc->params.twalk.nwname);
p9_put_int32(bufp, fid, &fc->params.twalk.fid);
p9_put_int32(bufp, newfid, &fc->params.twalk.newfid);
p9_put_int16(bufp, nwname, &fc->params.twalk.nwname);
for (i = 0; i < nwname; i++) {
v9fs_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]);
p9_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]);
}
if (buf_check_overflow(bufp)) {
@ -641,21 +656,22 @@ struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
error:
return fc;
}
EXPORT_SYMBOL(p9_create_twalk);
struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode)
struct p9_fcall *p9_create_topen(u32 fid, u8 mode)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4 + 1; /* fid[4] mode[1] */
fc = v9fs_create_common(bufp, size, TOPEN);
fc = p9_create_common(bufp, size, P9_TOPEN);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.topen.fid);
v9fs_put_int8(bufp, mode, &fc->params.topen.mode);
p9_put_int32(bufp, fid, &fc->params.topen.fid);
p9_put_int8(bufp, mode, &fc->params.topen.mode);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -664,31 +680,33 @@ struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode)
error:
return fc;
}
EXPORT_SYMBOL(p9_create_topen);
struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
char *extension, int extended)
struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
char *extension, int dotu)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4 + 2 + strlen(name) + 4 + 1; /* fid[4] name[s] perm[4] mode[1] */
if (extended) {
/* fid[4] name[s] perm[4] mode[1] */
size = 4 + 2 + strlen(name) + 4 + 1;
if (dotu) {
size += 2 + /* extension[s] */
(extension == NULL ? 0 : strlen(extension));
}
fc = v9fs_create_common(bufp, size, TCREATE);
fc = p9_create_common(bufp, size, P9_TCREATE);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.tcreate.fid);
v9fs_put_str(bufp, name, &fc->params.tcreate.name);
v9fs_put_int32(bufp, perm, &fc->params.tcreate.perm);
v9fs_put_int8(bufp, mode, &fc->params.tcreate.mode);
if (extended)
v9fs_put_str(bufp, extension, &fc->params.tcreate.extension);
p9_put_int32(bufp, fid, &fc->params.tcreate.fid);
p9_put_str(bufp, name, &fc->params.tcreate.name);
p9_put_int32(bufp, perm, &fc->params.tcreate.perm);
p9_put_int8(bufp, mode, &fc->params.tcreate.mode);
if (dotu)
p9_put_str(bufp, extension, &fc->params.tcreate.extension);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -697,22 +715,23 @@ struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
error:
return fc;
}
EXPORT_SYMBOL(p9_create_tcreate);
struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count)
struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4 + 8 + 4; /* fid[4] offset[8] count[4] */
fc = v9fs_create_common(bufp, size, TREAD);
fc = p9_create_common(bufp, size, P9_TREAD);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.tread.fid);
v9fs_put_int64(bufp, offset, &fc->params.tread.offset);
v9fs_put_int32(bufp, count, &fc->params.tread.count);
p9_put_int32(bufp, fid, &fc->params.tread.fid);
p9_put_int64(bufp, offset, &fc->params.tread.offset);
p9_put_int32(bufp, count, &fc->params.tread.count);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -721,24 +740,26 @@ struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count)
error:
return fc;
}
EXPORT_SYMBOL(p9_create_tread);
struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
const char __user * data)
struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count,
const char *data)
{
int size, err;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4 + 8 + 4 + count; /* fid[4] offset[8] count[4] data[count] */
fc = v9fs_create_common(bufp, size, TWRITE);
/* fid[4] offset[8] count[4] data[count] */
size = 4 + 8 + 4 + count;
fc = p9_create_common(bufp, size, P9_TWRITE);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.twrite.fid);
v9fs_put_int64(bufp, offset, &fc->params.twrite.offset);
v9fs_put_int32(bufp, count, &fc->params.twrite.count);
err = v9fs_put_user_data(bufp, data, count, &fc->params.twrite.data);
p9_put_int32(bufp, fid, &fc->params.twrite.fid);
p9_put_int64(bufp, offset, &fc->params.twrite.offset);
p9_put_int32(bufp, count, &fc->params.twrite.count);
err = p9_put_data(bufp, data, count, &fc->params.twrite.data);
if (err) {
kfree(fc);
fc = ERR_PTR(err);
@ -751,20 +772,30 @@ struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
error:
return fc;
}
EXPORT_SYMBOL(p9_create_twrite);
struct v9fs_fcall *v9fs_create_tclunk(u32 fid)
struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count,
const char __user *data)
{
int size;
struct v9fs_fcall *fc;
int size, err;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4; /* fid[4] */
fc = v9fs_create_common(bufp, size, TCLUNK);
/* fid[4] offset[8] count[4] data[count] */
size = 4 + 8 + 4 + count;
fc = p9_create_common(bufp, size, P9_TWRITE);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.tclunk.fid);
p9_put_int32(bufp, fid, &fc->params.twrite.fid);
p9_put_int64(bufp, offset, &fc->params.twrite.offset);
p9_put_int32(bufp, count, &fc->params.twrite.count);
err = p9_put_user_data(bufp, data, count, &fc->params.twrite.data);
if (err) {
kfree(fc);
fc = ERR_PTR(err);
}
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -773,20 +804,21 @@ struct v9fs_fcall *v9fs_create_tclunk(u32 fid)
error:
return fc;
}
EXPORT_SYMBOL(p9_create_twrite_u);
struct v9fs_fcall *v9fs_create_tremove(u32 fid)
struct p9_fcall *p9_create_tclunk(u32 fid)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4; /* fid[4] */
fc = v9fs_create_common(bufp, size, TREMOVE);
fc = p9_create_common(bufp, size, P9_TCLUNK);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.tremove.fid);
p9_put_int32(bufp, fid, &fc->params.tclunk.fid);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -795,20 +827,21 @@ struct v9fs_fcall *v9fs_create_tremove(u32 fid)
error:
return fc;
}
EXPORT_SYMBOL(p9_create_tclunk);
struct v9fs_fcall *v9fs_create_tstat(u32 fid)
struct p9_fcall *p9_create_tremove(u32 fid)
{
int size;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4; /* fid[4] */
fc = v9fs_create_common(bufp, size, TSTAT);
fc = p9_create_common(bufp, size, P9_TREMOVE);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.tstat.fid);
p9_put_int32(bufp, fid, &fc->params.tremove.fid);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -817,24 +850,48 @@ struct v9fs_fcall *v9fs_create_tstat(u32 fid)
error:
return fc;
}
EXPORT_SYMBOL(p9_create_tremove);
struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
int extended)
struct p9_fcall *p9_create_tstat(u32 fid)
{
int size;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
size = 4; /* fid[4] */
fc = p9_create_common(bufp, size, P9_TSTAT);
if (IS_ERR(fc))
goto error;
p9_put_int32(bufp, fid, &fc->params.tstat.fid);
if (buf_check_overflow(bufp)) {
kfree(fc);
fc = ERR_PTR(-ENOMEM);
}
error:
return fc;
}
EXPORT_SYMBOL(p9_create_tstat);
struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat,
int dotu)
{
int size, statsz;
struct v9fs_fcall *fc;
struct p9_fcall *fc;
struct cbuf buffer;
struct cbuf *bufp = &buffer;
statsz = v9fs_size_wstat(wstat, extended);
statsz = p9_size_wstat(wstat, dotu);
size = 4 + 2 + 2 + statsz; /* fid[4] stat[n] */
fc = v9fs_create_common(bufp, size, TWSTAT);
fc = p9_create_common(bufp, size, P9_TWSTAT);
if (IS_ERR(fc))
goto error;
v9fs_put_int32(bufp, fid, &fc->params.twstat.fid);
p9_put_int32(bufp, fid, &fc->params.twstat.fid);
buf_put_int16(bufp, statsz + 2);
v9fs_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, extended);
p9_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, dotu);
if (buf_check_overflow(bufp)) {
kfree(fc);
@ -843,3 +900,4 @@ struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
error:
return fc;
}
EXPORT_SYMBOL(p9_create_twstat);

79
fs/9p/error.h → net/9p/error.c
View file

@ -1,12 +1,11 @@
/*
* linux/fs/9p/error.h
* linux/fs/9p/error.c
*
* Huge Nasty Error Table
* Error string handling
*
* Plan 9 uses error strings, Unix uses error numbers. This table tries to
* match UNIX strings and Plan 9 strings to unix error numbers. It is used
* to preload the dynamic error table which can also track user-specific error
* strings.
* 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>
@ -28,8 +27,11 @@
*
*/
#include <linux/module.h>
#include <linux/list.h>
#include <linux/jhash.h>
#include <linux/errno.h>
#include <asm/errno.h>
#include <net/9p/9p.h>
struct errormap {
char *name;
@ -174,4 +176,65 @@ static struct errormap errmap[] = {
{NULL, -1}
};
extern int v9fs_error_init(void);
/**
* p9_error_init - preload
* @errstr: error string
*
*/
int p9_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;
}
EXPORT_SYMBOL(p9_error_init);
/**
* errstr2errno - convert error string to error number
* @errstr: error string
*
*/
int p9_errstr2errno(char *errstr, int len)
{
int errno;
struct hlist_node *p;
struct errormap *c;
int bucket;
errno = 0;
p = NULL;
c = NULL;
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;
}
EXPORT_SYMBOL(p9_errstr2errno);

165
fs/9p/fcprint.c → net/9p/fcprint.c
View file

@ -1,5 +1,5 @@
/*
* linux/fs/9p/fcprint.c
* net/9p/fcprint.c
*
* Print 9P call.
*
@ -25,61 +25,59 @@
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/idr.h>
#include <net/9p/9p.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "mux.h"
#ifdef CONFIG_NET_9P_DEBUG
static int
v9fs_printqid(char *buf, int buflen, struct v9fs_qid *q)
p9_printqid(char *buf, int buflen, struct p9_qid *q)
{
int n;
char b[10];
n = 0;
if (q->type & V9FS_QTDIR)
if (q->type & P9_QTDIR)
b[n++] = 'd';
if (q->type & V9FS_QTAPPEND)
if (q->type & P9_QTAPPEND)
b[n++] = 'a';
if (q->type & V9FS_QTAUTH)
if (q->type & P9_QTAUTH)
b[n++] = 'A';
if (q->type & V9FS_QTEXCL)
if (q->type & P9_QTEXCL)
b[n++] = 'l';
if (q->type & V9FS_QTTMP)
if (q->type & P9_QTTMP)
b[n++] = 't';
if (q->type & V9FS_QTSYMLINK)
if (q->type & P9_QTSYMLINK)
b[n++] = 'L';
b[n] = '\0';
return scnprintf(buf, buflen, "(%.16llx %x %s)", (long long int) q->path,
q->version, b);
return scnprintf(buf, buflen, "(%.16llx %x %s)",
(long long int) q->path, q->version, b);
}
static int
v9fs_printperm(char *buf, int buflen, int perm)
p9_printperm(char *buf, int buflen, int perm)
{
int n;
char b[15];
n = 0;
if (perm & V9FS_DMDIR)
if (perm & P9_DMDIR)
b[n++] = 'd';
if (perm & V9FS_DMAPPEND)
if (perm & P9_DMAPPEND)
b[n++] = 'a';
if (perm & V9FS_DMAUTH)
if (perm & P9_DMAUTH)
b[n++] = 'A';
if (perm & V9FS_DMEXCL)
if (perm & P9_DMEXCL)
b[n++] = 'l';
if (perm & V9FS_DMTMP)
if (perm & P9_DMTMP)
b[n++] = 't';
if (perm & V9FS_DMDEVICE)
if (perm & P9_DMDEVICE)
b[n++] = 'D';
if (perm & V9FS_DMSOCKET)
if (perm & P9_DMSOCKET)
b[n++] = 'S';
if (perm & V9FS_DMNAMEDPIPE)
if (perm & P9_DMNAMEDPIPE)
b[n++] = 'P';
if (perm & V9FS_DMSYMLINK)
if (perm & P9_DMSYMLINK)
b[n++] = 'L';
b[n] = '\0';
@ -87,7 +85,7 @@ v9fs_printperm(char *buf, int buflen, int perm)
}
static int
v9fs_printstat(char *buf, int buflen, struct v9fs_stat *st, int extended)
p9_printstat(char *buf, int buflen, struct p9_stat *st, int extended)
{
int n;
@ -105,9 +103,9 @@ v9fs_printstat(char *buf, int buflen, struct v9fs_stat *st, int extended)
n += scnprintf(buf+n, buflen-n, "(%d)", st->n_muid);
n += scnprintf(buf+n, buflen-n, " q ");
n += v9fs_printqid(buf+n, buflen-n, &st->qid);
n += p9_printqid(buf+n, buflen-n, &st->qid);
n += scnprintf(buf+n, buflen-n, " m ");
n += v9fs_printperm(buf+n, buflen-n, st->mode);
n += p9_printperm(buf+n, buflen-n, st->mode);
n += scnprintf(buf+n, buflen-n, " at %d mt %d l %lld",
st->atime, st->mtime, (long long int) st->length);
@ -119,7 +117,7 @@ v9fs_printstat(char *buf, int buflen, struct v9fs_stat *st, int extended)
}
static int
v9fs_dumpdata(char *buf, int buflen, u8 *data, int datalen)
p9_dumpdata(char *buf, int buflen, u8 *data, int datalen)
{
int i, n;
@ -139,13 +137,13 @@ v9fs_dumpdata(char *buf, int buflen, u8 *data, int datalen)
}
static int
v9fs_printdata(char *buf, int buflen, u8 *data, int datalen)
p9_printdata(char *buf, int buflen, u8 *data, int datalen)
{
return v9fs_dumpdata(buf, buflen, data, datalen<16?datalen:16);
return p9_dumpdata(buf, buflen, data, datalen < 16?datalen:16);
}
int
v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended)
p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended)
{
int i, ret, type, tag;
@ -157,21 +155,23 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended)
ret = 0;
switch (type) {
case TVERSION:
case P9_TVERSION:
ret += scnprintf(buf+ret, buflen-ret,
"Tversion tag %u msize %u version '%.*s'", tag,
fc->params.tversion.msize, fc->params.tversion.version.len,
fc->params.tversion.msize,
fc->params.tversion.version.len,
fc->params.tversion.version.str);
break;
case RVERSION:
case P9_RVERSION:
ret += scnprintf(buf+ret, buflen-ret,
"Rversion tag %u msize %u version '%.*s'", tag,
fc->params.rversion.msize, fc->params.rversion.version.len,
fc->params.rversion.msize,
fc->params.rversion.version.len,
fc->params.rversion.version.str);
break;
case TAUTH:
case P9_TAUTH:
ret += scnprintf(buf+ret, buflen-ret,
"Tauth tag %u afid %d uname '%.*s' aname '%.*s'", tag,
fc->params.tauth.afid, fc->params.tauth.uname.len,
@ -179,43 +179,45 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended)
fc->params.tauth.aname.str);
break;
case RAUTH:
case P9_RAUTH:
ret += scnprintf(buf+ret, buflen-ret, "Rauth tag %u qid ", tag);
v9fs_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid);
p9_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid);
break;
case TATTACH:
case P9_TATTACH:
ret += scnprintf(buf+ret, buflen-ret,
"Tattach tag %u fid %d afid %d uname '%.*s' aname '%.*s'",
tag, fc->params.tattach.fid, fc->params.tattach.afid,
"Tattach tag %u fid %d afid %d uname '%.*s' aname '%.*s'", tag,
fc->params.tattach.fid, fc->params.tattach.afid,
fc->params.tattach.uname.len, fc->params.tattach.uname.str,
fc->params.tattach.aname.len, fc->params.tattach.aname.str);
break;
case RATTACH:
ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ", tag);
v9fs_printqid(buf+ret, buflen-ret, &fc->params.rattach.qid);
case P9_RATTACH:
ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ",
tag);
p9_printqid(buf+ret, buflen-ret, &fc->params.rattach.qid);
break;
case RERROR:
ret += scnprintf(buf+ret, buflen-ret, "Rerror tag %u ename '%.*s'",
tag, fc->params.rerror.error.len,
case P9_RERROR:
ret += scnprintf(buf+ret, buflen-ret,
"Rerror tag %u ename '%.*s'", tag,
fc->params.rerror.error.len,
fc->params.rerror.error.str);
if (extended)
ret += scnprintf(buf+ret, buflen-ret, " ecode %d\n",
fc->params.rerror.errno);
break;
case TFLUSH:
case P9_TFLUSH:
ret += scnprintf(buf+ret, buflen-ret, "Tflush tag %u oldtag %u",
tag, fc->params.tflush.oldtag);
break;
case RFLUSH:
case P9_RFLUSH:
ret += scnprintf(buf+ret, buflen-ret, "Rflush tag %u", tag);
break;
case TWALK:
case P9_TWALK:
ret += scnprintf(buf+ret, buflen-ret,
"Twalk tag %u fid %d newfid %d nwname %d", tag,
fc->params.twalk.fid, fc->params.twalk.newfid,
@ -226,46 +228,48 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended)
fc->params.twalk.wnames[i].str);
break;
case RWALK:
case P9_RWALK:
ret += scnprintf(buf+ret, buflen-ret, "Rwalk tag %u nwqid %d",
tag, fc->params.rwalk.nwqid);
for (i = 0; i < fc->params.rwalk.nwqid; i++)
ret += v9fs_printqid(buf+ret, buflen-ret,
ret += p9_printqid(buf+ret, buflen-ret,
&fc->params.rwalk.wqids[i]);
break;
case TOPEN:
case P9_TOPEN:
ret += scnprintf(buf+ret, buflen-ret,
"Topen tag %u fid %d mode %d", tag,
fc->params.topen.fid, fc->params.topen.mode);
break;
case ROPEN:
case P9_ROPEN:
ret += scnprintf(buf+ret, buflen-ret, "Ropen tag %u", tag);
ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid);
ret += p9_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid);
ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
fc->params.ropen.iounit);
break;
case TCREATE:
case P9_TCREATE:
ret += scnprintf(buf+ret, buflen-ret,
"Tcreate tag %u fid %d name '%.*s' perm ", tag,
fc->params.tcreate.fid, fc->params.tcreate.name.len,
fc->params.tcreate.name.str);
ret += v9fs_printperm(buf+ret, buflen-ret, fc->params.tcreate.perm);
ret += p9_printperm(buf+ret, buflen-ret,
fc->params.tcreate.perm);
ret += scnprintf(buf+ret, buflen-ret, " mode %d",
fc->params.tcreate.mode);
break;
case RCREATE:
case P9_RCREATE:
ret += scnprintf(buf+ret, buflen-ret, "Rcreate tag %u", tag);
ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.rcreate.qid);
ret += p9_printqid(buf+ret, buflen-ret,
&fc->params.rcreate.qid);
ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
fc->params.rcreate.iounit);
break;
case TREAD:
case P9_TREAD:
ret += scnprintf(buf+ret, buflen-ret,
"Tread tag %u fid %d offset %lld count %u", tag,
fc->params.tread.fid,
@ -273,66 +277,66 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended)
fc->params.tread.count);
break;
case RREAD:
case P9_RREAD:
ret += scnprintf(buf+ret, buflen-ret,
"Rread tag %u count %u data ", tag,
fc->params.rread.count);
ret += v9fs_printdata(buf+ret, buflen-ret, fc->params.rread.data,
ret += p9_printdata(buf+ret, buflen-ret, fc->params.rread.data,
fc->params.rread.count);
break;
case TWRITE:
case P9_TWRITE:
ret += scnprintf(buf+ret, buflen-ret,
"Twrite tag %u fid %d offset %lld count %u data ",
tag, fc->params.twrite.fid,
(long long int) fc->params.twrite.offset,
fc->params.twrite.count);
ret += v9fs_printdata(buf+ret, buflen-ret, fc->params.twrite.data,
ret += p9_printdata(buf+ret, buflen-ret, fc->params.twrite.data,
fc->params.twrite.count);
break;
case RWRITE:
case P9_RWRITE:
ret += scnprintf(buf+ret, buflen-ret, "Rwrite tag %u count %u",
tag, fc->params.rwrite.count);
break;
case TCLUNK:
case P9_TCLUNK:
ret += scnprintf(buf+ret, buflen-ret, "Tclunk tag %u fid %d",
tag, fc->params.tclunk.fid);
break;
case RCLUNK:
case P9_RCLUNK:
ret += scnprintf(buf+ret, buflen-ret, "Rclunk tag %u", tag);
break;
case TREMOVE:
case P9_TREMOVE:
ret += scnprintf(buf+ret, buflen-ret, "Tremove tag %u fid %d",
tag, fc->params.tremove.fid);
break;
case RREMOVE:
case P9_RREMOVE:
ret += scnprintf(buf+ret, buflen-ret, "Rremove tag %u", tag);
break;
case TSTAT:
case P9_TSTAT:
ret += scnprintf(buf+ret, buflen-ret, "Tstat tag %u fid %d",
tag, fc->params.tstat.fid);
break;
case RSTAT:
case P9_RSTAT:
ret += scnprintf(buf+ret, buflen-ret, "Rstat tag %u ", tag);
ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat,
ret += p9_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat,
extended);
break;
case TWSTAT:
case P9_TWSTAT:
ret += scnprintf(buf+ret, buflen-ret, "Twstat tag %u fid %d ",
tag, fc->params.twstat.fid);
ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.twstat.stat,
extended);
ret += p9_printstat(buf+ret, buflen-ret,
&fc->params.twstat.stat, extended);
break;
case RWSTAT:
case P9_RWSTAT:
ret += scnprintf(buf+ret, buflen-ret, "Rwstat tag %u", tag);
break;
@ -343,3 +347,12 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended)
return ret;
}
#else
int
p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended)
{
return 0;
}
EXPORT_SYMBOL(p9_printfcall);
#endif /* CONFIG_NET_9P_DEBUG */

85
net/9p/mod.c Normal file
View file

@ -0,0 +1,85 @@
/*
* net/9p/9p.c
*
* 9P entry point
*
* Copyright (C) 2007 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/moduleparam.h>
#include <net/9p/9p.h>
#ifdef CONFIG_NET_9P_DEBUG
unsigned int p9_debug_level = 0; /* feature-rific global debug level */
EXPORT_SYMBOL(p9_debug_level);
module_param_named(debug, p9_debug_level, uint, 0);
MODULE_PARM_DESC(debug, "9P debugging level");
#endif
extern int p9_mux_global_init(void);
extern void p9_mux_global_exit(void);
extern int p9_sysctl_register(void);
extern void p9_sysctl_unregister(void);
/**
* v9fs_init - Initialize module
*
*/
static int __init init_p9(void)
{
int ret;
p9_error_init();
printk(KERN_INFO "Installing 9P2000 support\n");
ret = p9_mux_global_init();
if (ret) {
printk(KERN_WARNING "9p: starting mux failed\n");
return ret;
}
ret = p9_sysctl_register();
if (ret) {
printk(KERN_WARNING "9p: registering sysctl failed\n");
return ret;
}
return ret;
}
/**
* v9fs_init - shutdown module
*
*/
static void __exit exit_p9(void)
{
p9_sysctl_unregister();
p9_mux_global_exit();
}
module_init(init_p9)
module_exit(exit_p9)
MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
MODULE_LICENSE("GPL");

485
fs/9p/mux.c → net/9p/mux.c
View file

File diff suppressed because it is too large Load diff

86
net/9p/sysctl.c Normal file
View file

@ -0,0 +1,86 @@
/*
* net/9p/sysctl.c
*
* 9P sysctl interface
*
* Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
*
* 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/kernel.h>
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/init.h>
#include <net/9p/9p.h>
enum {
P9_SYSCTL_NET = 487,
P9_SYSCTL_DEBUG = 1,
};
static ctl_table p9_table[] = {
#ifdef CONFIG_NET_9P_DEBUG
{
.ctl_name = P9_SYSCTL_DEBUG,
.procname = "debug",
.data = &p9_debug_level,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
#endif
{ .ctl_name = 0 },
};
static ctl_table p9_net_table[] = {
{
.ctl_name = P9_SYSCTL_NET,
.procname = "9p",
.maxlen = 0,
.mode = 0555,
.child = p9_table,
},
{ .ctl_name = 0 },
};
static ctl_table p9_ctl_table[] = {
{
.ctl_name = CTL_NET,
.procname = "net",
.maxlen = 0,
.mode = 0555,
.child = p9_net_table,
},
{ .ctl_name = 0 },
};
static struct ctl_table_header *p9_table_header;
int __init p9_sysctl_register(void)
{
p9_table_header = register_sysctl_table(p9_ctl_table);
if (!p9_table_header)
return -ENOMEM;
return 0;
}
void __exit p9_sysctl_unregister(void)
{
unregister_sysctl_table(p9_table_header);
}

363
net/9p/trans_fd.c Normal file
View file

@ -0,0 +1,363 @@
/*
* linux/fs/9p/trans_fd.c
*
* Fd transport layer. Includes deprecated socket layer.
*
* Copyright (C) 2006 by Russ Cox <rsc@swtch.com>
* Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
*
* 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/in.h>
#include <linux/module.h>
#include <linux/net.h>
#include <linux/ipv6.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/un.h>
#include <linux/uaccess.h>
#include <linux/inet.h>
#include <linux/idr.h>
#include <linux/file.h>
#include <net/9p/9p.h>
#include <net/9p/transport.h>
#define P9_PORT 564
struct p9_trans_fd {
struct file *rd;
struct file *wr;
};
static int p9_socket_open(struct p9_transport *trans, struct socket *csocket);
static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd);
static int p9_fd_read(struct p9_transport *trans, void *v, int len);
static int p9_fd_write(struct p9_transport *trans, void *v, int len);
static unsigned int p9_fd_poll(struct p9_transport *trans,
struct poll_table_struct *pt);
static void p9_fd_close(struct p9_transport *trans);
struct p9_transport *p9_trans_create_tcp(const char *addr, int port)
{
int err;
struct p9_transport *trans;
struct socket *csocket;
struct sockaddr_in sin_server;
csocket = NULL;
trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
sin_server.sin_family = AF_INET;
sin_server.sin_addr.s_addr = in_aton(addr);
sin_server.sin_port = htons(port);
sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
if (!csocket) {
P9_EPRINTK(KERN_ERR, "p9_trans_tcp: problem creating socket\n");
err = -EIO;
goto error;
}
err = csocket->ops->connect(csocket,
(struct sockaddr *)&sin_server,
sizeof(struct sockaddr_in), 0);
if (err < 0) {
P9_EPRINTK(KERN_ERR,
"p9_trans_tcp: problem connecting socket to %s\n",
addr);
goto error;
}
err = p9_socket_open(trans, csocket);
if (err < 0)
goto error;
return trans;
error:
if (csocket)
sock_release(csocket);
kfree(trans);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_trans_create_tcp);
struct p9_transport *p9_trans_create_unix(const char *addr)
{
int err;
struct socket *csocket;
struct sockaddr_un sun_server;
struct p9_transport *trans;
csocket = NULL;
trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
if (strlen(addr) > UNIX_PATH_MAX) {
P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n",
addr);
err = -ENAMETOOLONG;
goto error;
}
sun_server.sun_family = PF_UNIX;
strcpy(sun_server.sun_path, addr);
sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
sizeof(struct sockaddr_un) - 1, 0);
if (err < 0) {
P9_EPRINTK(KERN_ERR,
"p9_trans_unix: problem connecting socket: %s: %d\n",
addr, err);
goto error;
}
err = p9_socket_open(trans, csocket);
if (err < 0)
goto error;
return trans;
error:
if (csocket)
sock_release(csocket);
kfree(trans);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_trans_create_unix);
struct p9_transport *p9_trans_create_fd(int rfd, int wfd)
{
int err;
struct p9_transport *trans;
if (rfd == ~0 || wfd == ~0) {
printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
return ERR_PTR(-ENOPROTOOPT);
}
trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
if (!trans)
return ERR_PTR(-ENOMEM);
trans->write = p9_fd_write;
trans->read = p9_fd_read;
trans->close = p9_fd_close;
trans->poll = p9_fd_poll;
err = p9_fd_open(trans, rfd, wfd);
if (err < 0)
goto error;
return trans;
error:
kfree(trans);
return ERR_PTR(err);
}
EXPORT_SYMBOL(p9_trans_create_fd);
static int p9_socket_open(struct p9_transport *trans, struct socket *csocket)
{
int fd, ret;
csocket->sk->sk_allocation = GFP_NOIO;
fd = sock_map_fd(csocket);
if (fd < 0) {
P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to map fd\n");
return fd;
}
ret = p9_fd_open(trans, fd, fd);
if (ret < 0) {
P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to open fd\n");
sockfd_put(csocket);
return ret;
}
((struct p9_trans_fd *)trans->priv)->rd->f_flags |= O_NONBLOCK;
return 0;
}
static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd)
{
struct p9_trans_fd *ts = kmalloc(sizeof(struct p9_trans_fd),
GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->rd = fget(rfd);
ts->wr = fget(wfd);
if (!ts->rd || !ts->wr) {
if (ts->rd)
fput(ts->rd);
if (ts->wr)
fput(ts->wr);
kfree(ts);
return -EIO;
}
trans->priv = ts;
trans->status = Connected;
return 0;
}
/**
* p9_fd_read- read from a fd
* @v9ses: session information
* @v: buffer to receive data into
* @len: size of receive buffer
*
*/
static int p9_fd_read(struct p9_transport *trans, void *v, int len)
{
int ret;
struct p9_trans_fd *ts = NULL;
if (trans && trans->status != Disconnected)
ts = trans->priv;
if (!ts)
return -EREMOTEIO;
if (!(ts->rd->f_flags & O_NONBLOCK))
P9_DPRINTK(P9_DEBUG_ERROR, "blocking read ...\n");
ret = kernel_read(ts->rd, ts->rd->f_pos, v, len);
if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
trans->status = Disconnected;
return ret;
}
/**
* p9_fd_write - write to a socket
* @v9ses: session information
* @v: buffer to send data from
* @len: size of send buffer
*
*/
static int p9_fd_write(struct p9_transport *trans, void *v, int len)
{
int ret;
mm_segment_t oldfs;
struct p9_trans_fd *ts = NULL;
if (trans && trans->status != Disconnected)
ts = trans->priv;
if (!ts)
return -EREMOTEIO;
if (!(ts->wr->f_flags & O_NONBLOCK))
P9_DPRINTK(P9_DEBUG_ERROR, "blocking write ...\n");
oldfs = get_fs();
set_fs(get_ds());
/* The cast to a user pointer is valid due to the set_fs() */
ret = vfs_write(ts->wr, (void __user *)v, len, &ts->wr->f_pos);
set_fs(oldfs);
if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
trans->status = Disconnected;
return ret;
}
static unsigned int
p9_fd_poll(struct p9_transport *trans, struct poll_table_struct *pt)
{
int ret, n;
struct p9_trans_fd *ts = NULL;
mm_segment_t oldfs;
if (trans && trans->status == Connected)
ts = trans->priv;
if (!ts)
return -EREMOTEIO;
if (!ts->rd->f_op || !ts->rd->f_op->poll)
return -EIO;
if (!ts->wr->f_op || !ts->wr->f_op->poll)
return -EIO;
oldfs = get_fs();
set_fs(get_ds());
ret = ts->rd->f_op->poll(ts->rd, pt);
if (ret < 0)
goto end;
if (ts->rd != ts->wr) {
n = ts->wr->f_op->poll(ts->wr, pt);
if (n < 0) {
ret = n;
goto end;
}
ret = (ret & ~POLLOUT) | (n & ~POLLIN);
}
end:
set_fs(oldfs);
return ret;
}
/**
* p9_sock_close - shutdown socket
* @trans: private socket structure
*
*/
static void p9_fd_close(struct p9_transport *trans)
{
struct p9_trans_fd *ts;
if (!trans)
return;
ts = xchg(&trans->priv, NULL);
if (!ts)
return;
trans->status = Disconnected;
if (ts->rd)
fput(ts->rd);
if (ts->wr)
fput(ts->wr);
kfree(ts);
}

125
net/9p/util.c Normal file
View file

@ -0,0 +1,125 @@
/*
* net/9p/util.c
*
* This file contains some helper functions
*
* Copyright (C) 2007 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/parser.h>
#include <linux/idr.h>
#include <net/9p/9p.h>
struct p9_idpool {
struct semaphore lock;
struct idr pool;
};
struct p9_idpool *p9_idpool_create(void)
{
struct p9_idpool *p;
p = kmalloc(sizeof(struct p9_idpool), GFP_KERNEL);
if (!p)
return ERR_PTR(-ENOMEM);
init_MUTEX(&p->lock);
idr_init(&p->pool);
return p;
}
EXPORT_SYMBOL(p9_idpool_create);
void p9_idpool_destroy(struct p9_idpool *p)
{
idr_destroy(&p->pool);
kfree(p);
}
EXPORT_SYMBOL(p9_idpool_destroy);
/**
* p9_idpool_get - allocate numeric id from pool
* @p - pool to allocate from
*
* XXX - This seems to be an awful generic function, should it be in idr.c with
* the lock included in struct idr?
*/
int p9_idpool_get(struct p9_idpool *p)
{
int i = 0;
int error;
retry:
if (idr_pre_get(&p->pool, GFP_KERNEL) == 0)
return 0;
if (down_interruptible(&p->lock) == -EINTR) {
P9_EPRINTK(KERN_WARNING, "Interrupted while locking\n");
return -1;
}
/* no need to store exactly p, we just need something non-null */
error = idr_get_new(&p->pool, p, &i);
up(&p->lock);
if (error == -EAGAIN)
goto retry;
else if (error)
return -1;
return i;
}
EXPORT_SYMBOL(p9_idpool_get);
/**
* p9_idpool_put - release numeric id from pool
* @p - pool to allocate from
*
* XXX - This seems to be an awful generic function, should it be in idr.c with
* the lock included in struct idr?
*/
void p9_idpool_put(int id, struct p9_idpool *p)
{
if (down_interruptible(&p->lock) == -EINTR) {
P9_EPRINTK(KERN_WARNING, "Interrupted while locking\n");
return;
}
idr_remove(&p->pool, id);
up(&p->lock);
}
EXPORT_SYMBOL(p9_idpool_put);
/**
* p9_idpool_check - check if the specified id is available
* @id - id to check
* @p - pool
*/
int p9_idpool_check(int id, struct p9_idpool *p)
{
return idr_find(&p->pool, id) != NULL;
}
EXPORT_SYMBOL(p9_idpool_check);

1
net/Kconfig
View file

@ -227,6 +227,7 @@ source "net/ieee80211/Kconfig"
endmenu
source "net/rfkill/Kconfig"
source "net/9p/Kconfig"
endif # if NET
endmenu # Networking

1
net/Makefile
View file

@ -51,6 +51,7 @@ obj-$(CONFIG_TIPC) += tipc/
obj-$(CONFIG_NETLABEL) += netlabel/
obj-$(CONFIG_IUCV) += iucv/
obj-$(CONFIG_RFKILL) += rfkill/
obj-$(CONFIG_NET_9P) += 9p/
ifeq ($(CONFIG_NET),y)
obj-$(CONFIG_SYSCTL) += sysctl_net.o