9p: Define and implement TSYMLINK for 9P2000.L

Create a symbolic link

SYNOPSIS

size[4] Tsymlink tag[2] fid[4] name[s] symtgt[s] gid[4]

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

DESCRIPTION

Create a symbolic link named 'name' pointing to 'symtgt'.
gid represents the effective group id of the caller.
The  permissions of a symbolic link are irrelevant hence it is omitted
from the protocol.

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Reviewed-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

2 files changed, 6 insertions, 0 deletions

diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index 5985c0f83db..44a6883d714 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -88,6 +88,8 @@ do { \
  * enum p9_msg_t - 9P message types
  * @P9_TSTATFS: file system status request
  * @P9_RSTATFS: file system status response
+ * @P9_TSYMLINK: make symlink request
+ * @P9_RSYMLINK: make symlink response
  * @P9_TRENAME: rename request
  * @P9_RRENAME: rename response
  * @P9_TVERSION: version handshake request
@@ -131,6 +133,8 @@ do { \
 enum p9_msg_t {
         P9_TSTATFS = 8,
         P9_RSTATFS,
+        P9_TSYMLINK = 16,
+        P9_RSYMLINK,
         P9_TRENAME = 20,
         P9_RRENAME,
         P9_TGETATTR = 24,
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index e36f11650e9..2e039730920 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -227,6 +227,8 @@ int p9_client_open(struct p9_fid *fid, int mode);
 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
                                                         char *extension);
 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_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,