9p: apply common tagpool handling to trans_fd

Simplify trans_fd by using new common client tagpool structure.

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

diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 180163b..6243093 100644 (file)
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -142,7 +142,6 @@ struct p9_poll_wait {
  * @lock: protects mux_list (?)
  * @mux_list: list link for mux to manage multiple connections (?)
  * @client: reference to client instance for this connection
- * @tagpool: id accounting for transactions
  * @err: error state
  * @req_list: accounting for requests which have been sent
  * @unsent_req_list: accounting for requests that haven't been sent
@@ -165,7 +164,6 @@ struct p9_conn {
        spinlock_t lock; /* protect lock structure */
        struct list_head mux_list;
        struct p9_client *client;
-       struct p9_idpool *tagpool;
        int err;
        struct list_head req_list;
        struct list_head unsent_req_list;
@@ -188,23 +186,6 @@ static LIST_HEAD(p9_poll_pending_list);
 static struct workqueue_struct *p9_mux_wq;
 static struct task_struct *p9_poll_task;
 
-static u16 p9_mux_get_tag(struct p9_conn *m)
-{
-       int tag;
-
-       tag = p9_idpool_get(m->tagpool);
-       if (tag < 0)
-               return P9_NOTAG;
-       else
-               return (u16) tag;
-}
-
-static void p9_mux_put_tag(struct p9_conn *m, u16 tag)
-{
-       if (tag != P9_NOTAG && p9_idpool_check(tag, m->tagpool))
-               p9_idpool_put(tag, m->tagpool);
-}
-
 static void p9_mux_poll_stop(struct p9_conn *m)
 {
        unsigned long flags;
@@ -226,7 +207,9 @@ static void p9_mux_poll_stop(struct p9_conn *m)
 
 static void p9_mux_free_request(struct p9_conn *m, struct p9_req *req)
 {
-       p9_mux_put_tag(m, req->tag);
+       if (req->tag != P9_NOTAG &&
+           p9_idpool_check(req->tag, m->client->tagpool))
+               p9_idpool_put(req->tag, m->client->tagpool);
        kfree(req);
 }
 
@@ -745,11 +728,6 @@ static struct p9_conn *p9_conn_create(struct p9_client *client)
        spin_lock_init(&m->lock);
        INIT_LIST_HEAD(&m->mux_list);
        m->client = client;
-       m->tagpool = p9_idpool_create();
-       if (IS_ERR(m->tagpool)) {
-               kfree(m);
-               return ERR_PTR(-ENOMEM);
-       }
 
        INIT_LIST_HEAD(&m->req_list);
        INIT_LIST_HEAD(&m->unsent_req_list);
@@ -848,14 +826,13 @@ static struct p9_req *p9_send_request(struct p9_conn *m, struct p9_fcall *tc)
        if (!req)
                return ERR_PTR(-ENOMEM);
 
-       if (tc->id == P9_TVERSION)
-               n = P9_NOTAG;
-       else
-               n = p9_mux_get_tag(m);
-
-       if (n < 0) {
-               kfree(req);
-               return ERR_PTR(-ENOMEM);
+       n = P9_NOTAG;
+       if (tc->id != P9_TVERSION) {
+               n = p9_idpool_get(m->client->tagpool);
+               if (n < 0) {
+                       kfree(req);
+                       return ERR_PTR(-ENOMEM);
+               }
        }
 
        p9_set_tag(tc, n);
@@ -1134,7 +1111,6 @@ static void p9_conn_destroy(struct p9_conn *m)
        p9_conn_cancel(m, -ECONNRESET);
 
        m->client = NULL;
-       p9_idpool_destroy(m->tagpool);
        kfree(m);
 }