9p: Add datasync to client side TFSYNC/RFSYNC for dotl

SYNOPSIS
    size[4] Tfsync tag[2] fid[4] datasync[4]

    size[4] Rfsync tag[2]

DESCRIPTION

    The Tfsync transaction transfers ("flushes") all modified in-core data of
    file identified by fid to the disk device (or other  permanent  storage
    device)  where that  file  resides.

    If datasync flag is specified data will be fleshed but does not flush
    modified metadata unless  that  metadata  is  needed  in order to allow a
    subsequent data retrieval to be correctly handled.

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

1 files changed, 4 insertions, 3 deletions

diff --git a/net/9p/client.c b/net/9p/client.c
index e3cfdff3732..8df80fb86f2 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1165,17 +1165,18 @@ int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
 }
 EXPORT_SYMBOL(p9_client_link);
 
-int p9_client_fsync(struct p9_fid *fid)
+int p9_client_fsync(struct p9_fid *fid, int datasync)
 {
         int err;
         struct p9_client *clnt;
         struct p9_req_t *req;
 
-        P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d\n", fid->fid);
+        P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n",
+                        fid->fid, datasync);
         err = 0;
         clnt = fid->clnt;
 
-        req = p9_client_rpc(clnt, P9_TFSYNC, "d", fid->fid);
+        req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync);
         if (IS_ERR(req)) {
                 err = PTR_ERR(req);
                 goto error;