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linux-stable/net/9p/fcprint.c
Latchesar Ionkov bd238fb431 9p: Reorganization of 9p file system code 
This patchset moves non-filesystem interfaces of v9fs from fs/9p to net/9p.
It moves the transport, packet marshalling and connection layers to net/9p
leaving only the VFS related files in fs/9p.  This work is being done in
preparation for in-kernel 9p servers as well as alternate 9p clients (other
than VFS).

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2007-07-14 15:13:40 -05:00

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/*
* net/9p/fcprint.c
*
* Print 9P call.
*
* Copyright (C) 2005 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 <net/9p/9p.h>
#ifdef CONFIG_NET_9P_DEBUG
static int
p9_printqid(char *buf, int buflen, struct p9_qid *q)
{
int n;
char b[10];
n = 0;
if (q->type & P9_QTDIR)
b[n++] = 'd';
if (q->type & P9_QTAPPEND)
b[n++] = 'a';
if (q->type & P9_QTAUTH)
b[n++] = 'A';
if (q->type & P9_QTEXCL)
b[n++] = 'l';
if (q->type & P9_QTTMP)
b[n++] = 't';
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);
}
static int
p9_printperm(char *buf, int buflen, int perm)
{
int n;
char b[15];
n = 0;
if (perm & P9_DMDIR)
b[n++] = 'd';
if (perm & P9_DMAPPEND)
b[n++] = 'a';
if (perm & P9_DMAUTH)
b[n++] = 'A';
if (perm & P9_DMEXCL)
b[n++] = 'l';
if (perm & P9_DMTMP)
b[n++] = 't';
if (perm & P9_DMDEVICE)
b[n++] = 'D';
if (perm & P9_DMSOCKET)
b[n++] = 'S';
if (perm & P9_DMNAMEDPIPE)
b[n++] = 'P';
if (perm & P9_DMSYMLINK)
b[n++] = 'L';
b[n] = '\0';
return scnprintf(buf, buflen, "%s%03o", b, perm&077);
}
static int
p9_printstat(char *buf, int buflen, struct p9_stat *st, int extended)
{
int n;
n = scnprintf(buf, buflen, "'%.*s' '%.*s'", st->name.len,
st->name.str, st->uid.len, st->uid.str);
if (extended)
n += scnprintf(buf+n, buflen-n, "(%d)", st->n_uid);
n += scnprintf(buf+n, buflen-n, " '%.*s'", st->gid.len, st->gid.str);
if (extended)
n += scnprintf(buf+n, buflen-n, "(%d)", st->n_gid);
n += scnprintf(buf+n, buflen-n, " '%.*s'", st->muid.len, st->muid.str);
if (extended)
n += scnprintf(buf+n, buflen-n, "(%d)", st->n_muid);
n += scnprintf(buf+n, buflen-n, " q ");
n += p9_printqid(buf+n, buflen-n, &st->qid);
n += scnprintf(buf+n, buflen-n, " m ");
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);
if (extended)
n += scnprintf(buf+n, buflen-n, " ext '%.*s'",
st->extension.len, st->extension.str);
return n;
}
static int
p9_dumpdata(char *buf, int buflen, u8 *data, int datalen)
{
int i, n;
i = n = 0;
while (i < datalen) {
n += scnprintf(buf + n, buflen - n, "%02x", data[i]);
if (i%4 == 3)
n += scnprintf(buf + n, buflen - n, " ");
if (i%32 == 31)
n += scnprintf(buf + n, buflen - n, "\n");
i++;
}
n += scnprintf(buf + n, buflen - n, "\n");
return n;
}
static int
p9_printdata(char *buf, int buflen, u8 *data, int datalen)
{
return p9_dumpdata(buf, buflen, data, datalen < 16?datalen:16);
}
int
p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended)
{
int i, ret, type, tag;
if (!fc)
return scnprintf(buf, buflen, "<NULL>");
type = fc->id;
tag = fc->tag;
ret = 0;
switch (type) {
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.version.str);
break;
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.version.str);
break;
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,
fc->params.tauth.uname.str, fc->params.tauth.aname.len,
fc->params.tauth.aname.str);
break;
case P9_RAUTH:
ret += scnprintf(buf+ret, buflen-ret, "Rauth tag %u qid ", tag);
p9_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid);
break;
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,
fc->params.tattach.uname.len, fc->params.tattach.uname.str,
fc->params.tattach.aname.len, fc->params.tattach.aname.str);
break;
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 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 P9_TFLUSH:
ret += scnprintf(buf+ret, buflen-ret, "Tflush tag %u oldtag %u",
tag, fc->params.tflush.oldtag);
break;
case P9_RFLUSH:
ret += scnprintf(buf+ret, buflen-ret, "Rflush tag %u", tag);
break;
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,
fc->params.twalk.nwname);
for (i = 0; i < fc->params.twalk.nwname; i++)
ret += scnprintf(buf+ret, buflen-ret, " '%.*s'",
fc->params.twalk.wnames[i].len,
fc->params.twalk.wnames[i].str);
break;
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 += p9_printqid(buf+ret, buflen-ret,
&fc->params.rwalk.wqids[i]);
break;
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 P9_ROPEN:
ret += scnprintf(buf+ret, buflen-ret, "Ropen tag %u", tag);
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 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 += p9_printperm(buf+ret, buflen-ret,
fc->params.tcreate.perm);
ret += scnprintf(buf+ret, buflen-ret, " mode %d",
fc->params.tcreate.mode);
break;
case P9_RCREATE:
ret += scnprintf(buf+ret, buflen-ret, "Rcreate tag %u", tag);
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 P9_TREAD:
ret += scnprintf(buf+ret, buflen-ret,
"Tread tag %u fid %d offset %lld count %u", tag,
fc->params.tread.fid,
(long long int) fc->params.tread.offset,
fc->params.tread.count);
break;
case P9_RREAD:
ret += scnprintf(buf+ret, buflen-ret,
"Rread tag %u count %u data ", tag,
fc->params.rread.count);
ret += p9_printdata(buf+ret, buflen-ret, fc->params.rread.data,
fc->params.rread.count);
break;
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 += p9_printdata(buf+ret, buflen-ret, fc->params.twrite.data,
fc->params.twrite.count);
break;
case P9_RWRITE:
ret += scnprintf(buf+ret, buflen-ret, "Rwrite tag %u count %u",
tag, fc->params.rwrite.count);
break;
case P9_TCLUNK:
ret += scnprintf(buf+ret, buflen-ret, "Tclunk tag %u fid %d",
tag, fc->params.tclunk.fid);
break;
case P9_RCLUNK:
ret += scnprintf(buf+ret, buflen-ret, "Rclunk tag %u", tag);
break;
case P9_TREMOVE:
ret += scnprintf(buf+ret, buflen-ret, "Tremove tag %u fid %d",
tag, fc->params.tremove.fid);
break;
case P9_RREMOVE:
ret += scnprintf(buf+ret, buflen-ret, "Rremove tag %u", tag);
break;
case P9_TSTAT:
ret += scnprintf(buf+ret, buflen-ret, "Tstat tag %u fid %d",
tag, fc->params.tstat.fid);
break;
case P9_RSTAT:
ret += scnprintf(buf+ret, buflen-ret, "Rstat tag %u ", tag);
ret += p9_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat,
extended);
break;
case P9_TWSTAT:
ret += scnprintf(buf+ret, buflen-ret, "Twstat tag %u fid %d ",
tag, fc->params.twstat.fid);
ret += p9_printstat(buf+ret, buflen-ret,
&fc->params.twstat.stat, extended);
break;
case P9_RWSTAT:
ret += scnprintf(buf+ret, buflen-ret, "Rwstat tag %u", tag);
break;
default:
ret += scnprintf(buf+ret, buflen-ret, "unknown type %d", type);
break;
}
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 */
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