fs/9p: This patch implements TLCREATE for 9p2000.L protocol.

SYNOPSIS

    size[4] Tlcreate tag[2] fid[4] name[s] flags[4] mode[4] gid[4]

    size[4] Rlcreate tag[2] qid[13] iounit[4]

DESCRIPTION

The Tlreate request asks the file server to create a new regular file with the
name supplied, in the directory (dir) represented by fid.
The mode argument specifies the permissions to use. New file is created with
the uid if the fid and with supplied gid.

The flags argument represent Linux access mode flags with which the caller
is requesting to open the file with. Protocol allows all the Linux access
modes but it is upto the server to allow/disallow any of these acess modes.
If the server doesn't support any of the access mode, it is expected to
return error.

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 091b471..06d111d 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -92,6 +92,8 @@
  * @P9_RSYMLINK: make symlink response
  * @P9_TMKNOD: create a special file object request
  * @P9_RMKNOD: create a special file object response
+ * @P9_TLCREATE: prepare a handle for I/O on an new file for 9P2000.L
+ * @P9_RLCREATE: response with file access information for 9P2000.L
  * @P9_TRENAME: rename request
  * @P9_RRENAME: rename response
  * @P9_TMKDIR: create a directory request
@@ -137,6 +139,8 @@
 enum p9_msg_t {
 	P9_TSTATFS = 8,
 	P9_RSTATFS,
+	P9_TLCREATE = 14,
+	P9_RLCREATE,
 	P9_TSYMLINK = 16,
 	P9_RSYMLINK,
 	P9_TMKNOD = 18,
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 55d913a..d755c0e 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -229,6 +229,8 @@
 int p9_client_link(struct p9_fid *fid, struct p9_fid *oldfid, char *newname);
 int p9_client_symlink(struct p9_fid *fid, char *name, char *symname, gid_t gid,
 							struct p9_qid *qid);
+int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
+		gid_t gid, struct p9_qid *qid);
 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, char __user *udata,