9p: Implement LOPEN

Implement 9p2000.L version of open(LOPEN) interface in 9p client.

For LOPEN, no need to convert the flags to and from 9p mode to VFS mode.

Synopsis:

    size[4] Tlopen tag[2] fid[4] mode[4]

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

[Fix mode bit format - jvrao@linux.vnet.ibm.com]

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 Hensbegren <ericvh@gmail.com>

1 files changed, 10 insertions, 7 deletions

diff --git a/net/9p/client.c b/net/9p/client.c
index e580409b1052..c458e042d384 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1016,14 +1016,18 @@ int p9_client_open(struct p9_fid *fid, int mode)
         struct p9_qid qid;
         int iounit;
 
-        P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode);
-        err = 0;
         clnt = fid->clnt;
+        P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n",
+                p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode);
+        err = 0;
 
         if (fid->mode != -1)
                 return -EINVAL;
 
-        req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
+        if (p9_is_proto_dotl(clnt))
+                req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode);
+        else
+                req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode);
         if (IS_ERR(req)) {
                 err = PTR_ERR(req);
                 goto error;
@@ -1035,10 +1039,9 @@ int p9_client_open(struct p9_fid *fid, int mode)
                 goto free_and_error;
         }
 
-        P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n",
-                                qid.type,
-                                (unsigned long long)qid.path,
-                                qid.version, iounit);
+        P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n",
+                p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN",  qid.type,
+                (unsigned long long)qid.path, qid.version, iounit);
 
         fid->mode = mode;
         fid->iounit = iounit;