LU-2456 lnet: Dynamic LNet Configuration (DLC) show command

[fs/lustre-release.git] / lnet / lnet / peer.c

diff --git a/lnet/lnet/peer.c b/lnet/lnet/peer.c
index 5b4b09e..744e151 100644 (file)
--- a/lnet/lnet/peer.c
+++ b/lnet/lnet/peer.c
@@ -39,6 +39,7 @@
 #define DEBUG_SUBSYSTEM S_LNET
 
 #include <lnet/lib-lnet.h>
+#include <lnet/lib-dlc.h>
 
 int
 lnet_peer_tables_create(void)
@@ -387,3 +388,62 @@ lnet_debug_peer(lnet_nid_t nid)
 
        lnet_net_unlock(cpt);
 }
+
+int lnet_get_peers(int count, __u64 *nid, char *aliveness,
+                  int *ncpt, int *refcount,
+                  int *ni_peer_tx_credits, int *peer_tx_credits,
+                  int *peer_rtr_credits, int *peer_min_rtr_credits,
+                  int *peer_tx_qnob)
+{
+       struct lnet_peer_table  *peer_table;
+       lnet_peer_t             *lp;
+       int                     j;
+       int                     lncpt, found = 0;
+
+       /* get the number of CPTs */
+       lncpt = cfs_percpt_number(the_lnet.ln_peer_tables);
+       /* if the cpt number to be examined is >= the number of cpts in
+        * the system then indicate that there are no more cpts to examin
+        */
+       if (*ncpt > lncpt)
+               return -1;
+
+       /* get the current table */
+       peer_table = the_lnet.ln_peer_tables[*ncpt];
+       /* if the ptable is NULL then there are no more cpts to examine */
+       if (peer_table == NULL)
+               return -1;
+
+       lnet_net_lock(*ncpt);
+
+       for (j = 0; j < LNET_PEER_HASH_SIZE && !found; j++) {
+               struct list_head *peers = &peer_table->pt_hash[j];
+
+               list_for_each_entry(lp, peers, lp_hashlist) {
+                       if (count-- > 0)
+                               continue;
+
+                       snprintf(aliveness, LNET_MAX_STR_LEN, "NA");
+                       if (lnet_isrouter(lp) ||
+                               lnet_peer_aliveness_enabled(lp))
+                               snprintf(aliveness, LNET_MAX_STR_LEN,
+                                        lp->lp_alive ? "up" : "down");
+
+                       *nid = lp->lp_nid;
+                       *refcount = lp->lp_refcount;
+                       *ni_peer_tx_credits = lp->lp_ni->ni_peertxcredits;
+                       *peer_tx_credits = lp->lp_txcredits;
+                       *peer_rtr_credits = lp->lp_rtrcredits;
+                       *peer_min_rtr_credits = lp->lp_mintxcredits;
+                       *peer_tx_qnob = lp->lp_txqnob;
+
+                       found = 1;
+               }
+
+       }
+       lnet_net_unlock(*ncpt);
+
+       *ncpt = lncpt;
+
+       return found ? 0 : -ENOENT;
+}