1 files changed, 31 insertions, 3 deletions

diff --git a/net/9p/client.c b/net/9p/client.c
index 1eb580c38fbb..93f442aaa119 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1251,12 +1251,42 @@ error:
 }
 EXPORT_SYMBOL(p9_client_stat);
 
+static int p9_client_statsize(struct p9_wstat *wst, int optional)
+{
+        int ret;
+
+        /* size[2] type[2] dev[4] qid[13] */
+        /* mode[4] atime[4] mtime[4] length[8]*/
+        /* name[s] uid[s] gid[s] muid[s] */
+        ret = 2+2+4+13+4+4+4+8+2+2+2+2;
+
+        if (wst->name)
+                ret += strlen(wst->name);
+        if (wst->uid)
+                ret += strlen(wst->uid);
+        if (wst->gid)
+                ret += strlen(wst->gid);
+        if (wst->muid)
+                ret += strlen(wst->muid);
+
+        if (optional) {
+                ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */
+                if (wst->extension)
+                        ret += strlen(wst->extension);
+        }
+
+        return ret;
+}
+
 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
 {
         int err;
         struct p9_req_t *req;
         struct p9_client *clnt;
 
+        err = 0;
+        clnt = fid->clnt;
+        wst->size = p9_client_statsize(wst, clnt->dotu);
         P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid);
         P9_DPRINTK(P9_DEBUG_9P,
                 "     sz=%x type=%x dev=%x qid=%x.%llx.%x\n"
@@ -1268,10 +1298,8 @@ int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
                 wst->atime, wst->mtime, (unsigned long long)wst->length,
                 wst->name, wst->uid, wst->gid, wst->muid, wst->extension,
                 wst->n_uid, wst->n_gid, wst->n_muid);
-        err = 0;
-        clnt = fid->clnt;
 
-        req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, 0, wst);
+        req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size, wst);
         if (IS_ERR(req)) {
                 err = PTR_ERR(req);
                 goto error;