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>

1 files changed, 358 insertions, 0 deletions

diff --git a/net/9p/fcprint.c b/net/9p/fcprint.c
new file mode 100644
index 0000000..b1ae8ec
--- /dev/null
+++ b/net/9p/fcprint.c
@@ -0,0 +1,358 @@
+/*
+ *  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 */