9p: encapsulate version function

Alsmot all 9P client wire functions have their own (set of) functions.
Tversion is an exception as its encapsulated into the client_create code.

This patch moves the protocol specifics of this to a function to match the
rest of the code.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

diff --git a/net/9p/client.c b/net/9p/client.c
index 90ee9ef..a9982df 100644 (file)
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -587,16 +587,56 @@ static void p9_fid_destroy(struct p9_fid *fid)
        kfree(fid);
 }
 
-struct p9_client *p9_client_create(const char *dev_name, char *options)
+static int p9_client_version(struct p9_client *clnt)
 {
-       int err, n;
-       struct p9_client *clnt;
+       int err = 0;
        struct p9_fcall *tc, *rc;
        struct p9_str *version;
 
+       P9_DPRINTK(P9_DEBUG_9P, "%p\n", clnt);
        err = 0;
        tc = NULL;
        rc = NULL;
+
+       tc = p9_create_tversion(clnt->msize,
+                                       clnt->dotu ? "9P2000.u" : "9P2000");
+       if (IS_ERR(tc)) {
+               err = PTR_ERR(tc);
+               tc = NULL;
+               goto error;
+       }
+
+       err = p9_client_rpc(clnt, tc, &rc);
+       if (err)
+               goto error;
+
+       version = &rc->params.rversion.version;
+       if (version->len == 8 && !memcmp(version->str, "9P2000.u", 8))
+               clnt->dotu = 1;
+       else if (version->len == 6 && !memcmp(version->str, "9P2000", 6))
+               clnt->dotu = 0;
+       else {
+               err = -EREMOTEIO;
+               goto error;
+       }
+
+       if (rc->params.rversion.msize < clnt->msize)
+               clnt->msize = rc->params.rversion.msize;
+
+error:
+       kfree(tc);
+       kfree(rc);
+
+       return err;
+}
+EXPORT_SYMBOL(p9_client_auth);
+
+struct p9_client *p9_client_create(const char *dev_name, char *options)
+{
+       int err;
+       struct p9_client *clnt;
+
+       err = 0;
        clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
        if (!clnt)
                return ERR_PTR(-ENOMEM);
@@ -628,7 +668,6 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
        P9_DPRINTK(P9_DEBUG_9P, "clnt %p trans %p msize %d dotu %d\n",
                clnt, clnt->trans_mod, clnt->msize, clnt->dotu);
 
-
        err = clnt->trans_mod->create(clnt, dev_name, options);
        if (err)
                goto error;
@@ -636,38 +675,13 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
        if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize)
                clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ;
 
-       tc = p9_create_tversion(clnt->msize, clnt->dotu?"9P2000.u":"9P2000");
-       if (IS_ERR(tc)) {
-               err = PTR_ERR(tc);
-               tc = NULL;
-               goto error;
-       }
-
-       err = p9_client_rpc(clnt, tc, &rc);
+       err = p9_client_version(clnt);
        if (err)
                goto error;
 
-       version = &rc->params.rversion.version;
-       if (version->len == 8 && !memcmp(version->str, "9P2000.u", 8))
-               clnt->dotu = 1;
-       else if (version->len == 6 && !memcmp(version->str, "9P2000", 6))
-               clnt->dotu = 0;
-       else {
-               err = -EREMOTEIO;
-               goto error;
-       }
-
-       n = rc->params.rversion.msize;
-       if (n < clnt->msize)
-               clnt->msize = n;
-
-       kfree(tc);
-       kfree(rc);
        return clnt;
 
 error:
-       kfree(tc);
-       kfree(rc);
        p9_client_destroy(clnt);
        return ERR_PTR(err);
 }