libceph: define mds_alloc_msg() method
[deliverable/linux.git] / net / ceph / messenger.c
index 6ec6051e16723e5fdfd910916d88b60f35b2c6f4..c7d427876dbc449c2db20b0c09e7957a5510a77b 100644 (file)
@@ -2804,55 +2804,34 @@ static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg)
 static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip)
 {
        struct ceph_msg_header *hdr = &con->in_hdr;
-       int type = le16_to_cpu(hdr->type);
-       int front_len = le32_to_cpu(hdr->front_len);
        int middle_len = le32_to_cpu(hdr->middle_len);
        struct ceph_msg *msg;
        int ret = 0;
 
        BUG_ON(con->in_msg != NULL);
+       BUG_ON(!con->ops->alloc_msg);
 
-       if (con->ops->alloc_msg) {
-               mutex_unlock(&con->mutex);
-               msg = con->ops->alloc_msg(con, hdr, skip);
-               mutex_lock(&con->mutex);
-               if (con->state != CON_STATE_OPEN) {
-                       if (msg)
-                               ceph_msg_put(msg);
-                       return -EAGAIN;
-               }
-               con->in_msg = msg;
-               if (con->in_msg) {
-                       con->in_msg->con = con->ops->get(con);
-                       BUG_ON(con->in_msg->con == NULL);
-               }
-               if (*skip) {
-                       con->in_msg = NULL;
-                       return 0;
-               }
-               if (!con->in_msg) {
-                       con->error_msg =
-                               "error allocating memory for incoming message";
-                       return -ENOMEM;
-               }
-       }
-       if (!con->in_msg) {
-               mutex_unlock(&con->mutex);
-               msg = ceph_msg_new(type, front_len, GFP_NOFS, false);
-               mutex_lock(&con->mutex);
-               if (!msg) {
-                       pr_err("unable to allocate msg type %d len %d\n",
-                              type, front_len);
-                       return -ENOMEM;
-               }
-               if (con->state != CON_STATE_OPEN) {
+       mutex_unlock(&con->mutex);
+       msg = con->ops->alloc_msg(con, hdr, skip);
+       mutex_lock(&con->mutex);
+       if (con->state != CON_STATE_OPEN) {
+               if (msg)
                        ceph_msg_put(msg);
-                       return -EAGAIN;
-               }
-               con->in_msg = msg;
+               return -EAGAIN;
+       }
+       con->in_msg = msg;
+       if (con->in_msg) {
                con->in_msg->con = con->ops->get(con);
                BUG_ON(con->in_msg->con == NULL);
-               con->in_msg->page_alignment = le16_to_cpu(hdr->data_off);
+       }
+       if (*skip) {
+               con->in_msg = NULL;
+               return 0;
+       }
+       if (!con->in_msg) {
+               con->error_msg =
+                       "error allocating memory for incoming message";
+               return -ENOMEM;
        }
        memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr));
 
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