daemon: make glfs lru cache capacity configurable

$ gluster-blockd --help
gluster-blockd (0.2)
usage:
  gluster-blockd [--glfs-lru-count <count>]

commands:
  --glfs-lru-count <count>
        glfs objects cache capacity [max: 512] (default: 5)
  --help
        show this message and exit.
  --version
        show version info and exit.

Change-Id: I00a9277690a1c5ace51e223e9e4ed9ce61ae2428
Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/utils/lru.c b/utils/lru.c
index f1e884b..7fd036e 100644
--- a/utils/lru.c
+++ b/utils/lru.c
@@ -10,11 +10,10 @@
 
 # include "lru.h"
 
-# define  LRU_CAPACITY  5
-
 
 static struct list_head Cache;
 static int lruCount;
+size_t glfsLruCount = 5;  /* default lru cache size */
 
 typedef struct Entry {
   char volume[256];
@@ -50,7 +49,7 @@ appendNewEntry(const char *volname, glfs_t *fs)
   Entry *tmp;
 
 
-  if (lruCount == LRU_CAPACITY) {
+  if (lruCount == glfsLruCount) {
     releaseColdEntry();
   }