[PATCH] v9fs: print 9p messages

Print 9p messages.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/9p/9p.h

@@ -372,3 +372,4 @@ int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid,
 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);

fs/9p/Makefile

@@ -13,5 +13,6 @@ obj-$(CONFIG_9P_FS) := 9p2000.o
 	vfs_dentry.o \
 	error.o \
 	v9fs.o \
-	fid.o
+	fid.o \
+	fcprint.o
 

fs/9p/debug.h

@@ -30,6 +30,7 @@
 #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
 

fs/9p/fcprint.c

@@ -0,0 +1,347 @@
+/*
+ *  linux/fs/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 as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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/config.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/idr.h>
+
+#include "debug.h"
+#include "v9fs.h"
+#include "9p.h"
+#include "mux.h"
+
+static int
+v9fs_printqid(char *buf, int buflen, struct v9fs_qid *q)
+{
+	int n;
+	char b[10];
+
+	n = 0;
+	if (q->type & V9FS_QTDIR)
+		b[n++] = 'd';
+	if (q->type & V9FS_QTAPPEND)
+		b[n++] = 'a';
+	if (q->type & V9FS_QTAUTH)
+		b[n++] = 'A';
+	if (q->type & V9FS_QTEXCL)
+		b[n++] = 'l';
+	if (q->type & V9FS_QTTMP)
+		b[n++] = 't';
+	if (q->type & V9FS_QTSYMLINK)
+		b[n++] = 'L';
+	b[n] = '\0';
+
+	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)
+{
+	int n;
+	char b[15];
+
+	n = 0;
+	if (perm & V9FS_DMDIR)
+		b[n++] = 'd';
+	if (perm & V9FS_DMAPPEND)
+		b[n++] = 'a';
+	if (perm & V9FS_DMAUTH)
+		b[n++] = 'A';
+	if (perm & V9FS_DMEXCL)
+		b[n++] = 'l';
+	if (perm & V9FS_DMTMP)
+		b[n++] = 't';
+	if (perm & V9FS_DMDEVICE)
+		b[n++] = 'D';
+	if (perm & V9FS_DMSOCKET)
+		b[n++] = 'S';
+	if (perm & V9FS_DMNAMEDPIPE)
+		b[n++] = 'P';
+	if (perm & V9FS_DMSYMLINK)
+		b[n++] = 'L';
+	b[n] = '\0';
+
+	return scnprintf(buf, buflen, "%s%03o", b, perm&077);
+}
+
+static int
+v9fs_printstat(char *buf, int buflen, struct v9fs_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 += v9fs_printqid(buf+n, buflen-n, &st->qid);
+	n += scnprintf(buf+n, buflen-n, " m ");
+	n += v9fs_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
+v9fs_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
+v9fs_printdata(char *buf, int buflen, u8 *data, int datalen)
+{
+	return v9fs_dumpdata(buf, buflen, data, datalen<16?datalen:16);
+}
+
+int
+v9fs_printfcall(char *buf, int buflen, struct v9fs_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 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 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 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 RAUTH:
+		ret += scnprintf(buf+ret, buflen-ret, "Rauth tag %u qid ", tag);
+		v9fs_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid);
+		break;
+
+	case 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 RATTACH:
+		ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ", tag);
+		v9fs_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,
+			fc->params.rerror.error.str);
+		if (extended)
+			ret += scnprintf(buf+ret, buflen-ret, " ecode %d\n",
+				fc->params.rerror.errno);
+		break;
+
+	case TFLUSH:
+		ret += scnprintf(buf+ret, buflen-ret, "Tflush tag %u oldtag %u",
+			tag, fc->params.tflush.oldtag);
+		break;
+
+	case RFLUSH:
+		ret += scnprintf(buf+ret, buflen-ret, "Rflush tag %u", tag);
+		break;
+
+	case 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 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,
+				&fc->params.rwalk.wqids[i]);
+		break;
+
+	case 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:
+		ret += scnprintf(buf+ret, buflen-ret, "Ropen tag %u", tag);
+		ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid);
+		ret += scnprintf(buf+ret, buflen-ret," iounit %d",
+			fc->params.ropen.iounit);
+		break;
+
+	case 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 += scnprintf(buf+ret, buflen-ret, " mode %d",
+			fc->params.tcreate.mode);
+		break;
+
+	case RCREATE:
+		ret += scnprintf(buf+ret, buflen-ret, "Rcreate tag %u", tag);
+		ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.rcreate.qid);
+		ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
+			fc->params.rcreate.iounit);
+		break;
+
+	case 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 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,
+			fc->params.rread.count);
+		break;
+
+	case 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,
+			fc->params.twrite.count);
+		break;
+
+	case RWRITE:
+		ret += scnprintf(buf+ret, buflen-ret, "Rwrite tag %u count %u",
+			tag, fc->params.rwrite.count);
+		break;
+
+	case TCLUNK:
+		ret += scnprintf(buf+ret, buflen-ret, "Tclunk tag %u fid %d",
+			tag, fc->params.tclunk.fid);
+		break;
+
+	case RCLUNK:
+		ret += scnprintf(buf+ret, buflen-ret, "Rclunk tag %u", tag);
+		break;
+
+	case TREMOVE:
+		ret += scnprintf(buf+ret, buflen-ret, "Tremove tag %u fid %d",
+			tag, fc->params.tremove.fid);
+		break;
+
+	case RREMOVE:
+		ret += scnprintf(buf+ret, buflen-ret, "Rremove tag %u", tag);
+		break;
+
+	case TSTAT:
+		ret += scnprintf(buf+ret, buflen-ret, "Tstat tag %u fid %d",
+			tag, fc->params.tstat.fid);
+		break;
+
+	case RSTAT:
+		ret += scnprintf(buf+ret, buflen-ret, "Rstat tag %u ", tag);
+		ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat,
+			extended);
+		break;
+
+	case 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);
+		break;
+
+	case 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;
+}

fs/9p/mux.c

@@ -635,6 +635,14 @@ static void v9fs_read_work(void *a)
 			goto error;
 		}
 
+		if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) {
+			char buf[150];
+
+			v9fs_printfcall(buf, sizeof(buf), m->rcall,
+				*m->extended);
+			printk(KERN_NOTICE ">>> %p %s\n", m, buf);
+		}
+
 		rcall = m->rcall;
 		rbuf = m->rbuf;
 		if (m->rpos > n) {
@@ -740,6 +748,13 @@ static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m,
 
 	v9fs_set_tag(tc, n);
 
+	if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) {
+		char buf[150];
+
+		v9fs_printfcall(buf, sizeof(buf), tc, *m->extended);
+		printk(KERN_NOTICE "<<< %p %s\n", m, buf);
+	}
+
 	req->tag = n;
 	req->tcall = tc;
 	req->rcall = NULL;