From 15d9ee36c71bfe3499d7f3baf3a483199211261f Mon Sep 17 00:00:00 2001
From: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Date: Thu, 1 Jun 2017 15:08:44 +0530
Subject: 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>
---
 daemon/Makefile.am      |  6 ++---
 daemon/gluster-blockd.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 3 deletions(-)

(limited to 'daemon')

diff --git a/daemon/Makefile.am b/daemon/Makefile.am
index a44158a..de5367c 100644
--- a/daemon/Makefile.am
+++ b/daemon/Makefile.am
@@ -3,10 +3,10 @@ sbin_PROGRAMS = gluster-blockd
 gluster_blockd_SOURCES = gluster-blockd.c
 
 gluster_blockd_CFLAGS = $(GFAPI_CFLAGS) -DDATADIR=\"$(localstatedir)\"         \
-                        -I$(top_srcdir)/utils/ -I$(top_srcdir)/rpc             \
-                        -I$(top_builddir)/rpc/rpcl
+                        -I$(top_builddir)/ -I$(top_srcdir)/utils/              \
+                        -I$(top_srcdir)/rpc -I$(top_builddir)/rpc/rpcl
 
-gluster_blockd_LDADD = $(PTHREAD) $(top_builddir)/rpc/libgbrpc.la    \
+gluster_blockd_LDADD = $(PTHREAD) $(top_builddir)/rpc/libgbrpc.la              \
                        $(top_builddir)/utils/libgb.la
 
 DISTCLEANFILES = Makefile.in
diff --git a/daemon/gluster-blockd.c b/daemon/gluster-blockd.c
index 0f06a70..5d546bd 100644
--- a/daemon/gluster-blockd.c
+++ b/daemon/gluster-blockd.c
@@ -15,6 +15,7 @@
 # include  <pthread.h>
 # include  <rpc/pmap_clnt.h>
 
+# include  "config.h"
 # include  "common.h"
 # include  "lru.h"
 # include  "block.h"
@@ -22,6 +23,30 @@
 
 
 
+extern size_t glfsLruCount;
+extern const char *argp_program_version;
+
+
+static void
+glusterBlockDHelp(void)
+{
+  MSG("%s",
+      "gluster-blockd ("PACKAGE_VERSION")\n"
+      "usage:\n"
+      "  gluster-blockd [--glfs-lru-count <count>]\n"
+      "\n"
+      "commands:\n"
+      "  --glfs-lru-count <count>\n"
+      "        glfs objects cache capacity [max: 512] (default: 5)\n"
+      "  --help\n"
+      "        show this message and exit.\n"
+      "  --version\n"
+      "        show version info and exit.\n"
+      "\n"
+     );
+}
+
+
 static bool
 glusterBlockLogdirCreate(void)
 {
@@ -184,8 +209,48 @@ main (int argc, char **argv)
   pthread_t server_thread;
   struct flock lock = {0, };
   int errnosv = 0;
+  size_t opt = 0;
 
 
+  if (argc > 1) {
+    opt = glusterBlockDaemonOptEnumParse(argv[1]);
+    if (!opt || opt >= GB_DAEMON_OPT_MAX) {
+      MSG("unknown option: %s\n", argv[1]);
+      return -1;
+    }
+
+    switch (opt) {
+    case GB_DAEMON_HELP:
+    case GB_DAEMON_USAGE:
+      if (argc != 2) {
+        MSG("undesired options for: %s\n", argv[1]);
+      }
+      glusterBlockDHelp();
+      return 0;
+
+    case GB_DAEMON_VERSION:
+      MSG("%s\n", argp_program_version);
+      return 0;
+
+    case GB_DAEMON_GLFS_LRU_COUNT:
+      if (argc != 3) {
+        MSG("undesired options for: %s\n", argv[1]);
+        return -1;
+      }
+      if (sscanf(argv[2], "%zu", &glfsLruCount) != 1) {
+        MSG("option '%s' expect argument type integer <count>\n", argv[1]);
+        return -1;
+      }
+      if (!glfsLruCount || (glfsLruCount > LRU_COUNT_MAX)) {
+        MSG("glfs-lru-count argument should be [0 < count < %d]\n", LRU_COUNT_MAX);
+        LOG("mgmt", GB_LOG_ERROR,
+            "glfs-lru-count argument should be [0 < count < %d]\n", LRU_COUNT_MAX);
+        return -1;
+      }
+      break;
+    }
+  }
+
   if (!glusterBlockLogdirCreate()) {
     return -1;
   }
-- 
cgit