LU-4687 obdclass: unified flow control interfaces

[fs/lustre-release.git] / lustre / fld / fld_request.c

diff --git a/lustre/fld/fld_request.c b/lustre/fld/fld_request.c
index 2a2a927..6a4986e 100644 (file)
--- a/lustre/fld/fld_request.c
+++ b/lustre/fld/fld_request.c
@@ -60,57 +60,6 @@
 #include <lustre_mdc.h>
 #include "fld_internal.h"
 
-/* TODO: these 3 functions are copies of flow-control code from mdc_lib.c
- * It should be common thing. The same about mdc RPC lock */
-static int fld_req_avail(struct client_obd *cli, struct mdc_cache_waiter *mcw)
-{
-        int rc;
-        ENTRY;
-        client_obd_list_lock(&cli->cl_loi_list_lock);
-        rc = cfs_list_empty(&mcw->mcw_entry);
-        client_obd_list_unlock(&cli->cl_loi_list_lock);
-        RETURN(rc);
-};
-
-static void fld_enter_request(struct client_obd *cli)
-{
-       struct mdc_cache_waiter mcw;
-       struct l_wait_info lwi = { 0 };
-
-       client_obd_list_lock(&cli->cl_loi_list_lock);
-       if (cli->cl_r_in_flight >= cli->cl_max_rpcs_in_flight) {
-               cfs_list_add_tail(&mcw.mcw_entry, &cli->cl_cache_waiters);
-               init_waitqueue_head(&mcw.mcw_waitq);
-               client_obd_list_unlock(&cli->cl_loi_list_lock);
-               l_wait_event(mcw.mcw_waitq, fld_req_avail(cli, &mcw), &lwi);
-       } else {
-               cli->cl_r_in_flight++;
-               client_obd_list_unlock(&cli->cl_loi_list_lock);
-       }
-}
-
-static void fld_exit_request(struct client_obd *cli)
-{
-       cfs_list_t *l, *tmp;
-       struct mdc_cache_waiter *mcw;
-
-       client_obd_list_lock(&cli->cl_loi_list_lock);
-       cli->cl_r_in_flight--;
-       cfs_list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
-
-               if (cli->cl_r_in_flight >= cli->cl_max_rpcs_in_flight) {
-                       /* No free request slots anymore */
-                       break;
-               }
-
-               mcw = cfs_list_entry(l, struct mdc_cache_waiter, mcw_entry);
-               cfs_list_del_init(&mcw->mcw_entry);
-               cli->cl_r_in_flight++;
-               wake_up(&mcw->mcw_waitq);
-       }
-       client_obd_list_unlock(&cli->cl_loi_list_lock);
-}
-
 static int fld_rrb_hash(struct lu_client_fld *fld,
                         seqno_t seq)
 {
@@ -477,9 +426,9 @@ again:
        req->rq_reply_portal = MDC_REPLY_PORTAL;
         ptlrpc_at_set_req_timeout(req);
 
-       fld_enter_request(&exp->exp_obd->u.cli);
+       obd_get_request_slot(&exp->exp_obd->u.cli);
        rc = ptlrpc_queue_wait(req);
-       fld_exit_request(&exp->exp_obd->u.cli);
+       obd_put_request_slot(&exp->exp_obd->u.cli);
        if (rc != 0) {
                if (rc == -EWOULDBLOCK) {
                        /* For no_delay req(see above), EWOULDBLOCK means the