9p: Implement TMKNOD

Synopsis

    size[4] Tmknod tag[2] fid[4] name[s] mode[4] major[4] minor[4] gid[4]

    size[4] Rmknod tag[2] qid[13]

Description

    mknod asks the file server to create a device node with given major and
    minor number, mode and gid. The qid for the new device node is returned
    with the mknod reply message.

[sripathik@in.ibm.com: Fix error handling code]

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index 44a6883..ff32091 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -90,6 +90,8 @@
  * @P9_RSTATFS: file system status response
  * @P9_TSYMLINK: make symlink request
  * @P9_RSYMLINK: make symlink response
+ * @P9_TMKNOD: create a special file object request
+ * @P9_RMKNOD: create a special file object response
  * @P9_TRENAME: rename request
  * @P9_RRENAME: rename response
  * @P9_TVERSION: version handshake request
@@ -135,6 +137,8 @@
 	P9_RSTATFS,
 	P9_TSYMLINK = 16,
 	P9_RSYMLINK,
+	P9_TMKNOD = 18,
+	P9_RMKNOD,
 	P9_TRENAME = 20,
 	P9_RRENAME,
 	P9_TGETATTR = 24,