From 3b5f237cd7b2306699f27bbca8b00b7bcd73fa25 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Thu, 18 Sep 2008 14:26:57 -0700
Subject: [PATCH] osdmaptool: lpg_bits specifiable

---
 src/config.cc     | 1 +
 src/config.h      | 1 +
 src/osd/OSDMap.cc | 9 ++++++---
 src/osd/OSDMap.h  | 3 ++-
 src/osdmaptool.cc | 7 +++++--
 5 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/src/config.cc b/src/config.cc
index c17b5f6c30576..8cd230275e426 100644
--- a/src/config.cc
+++ b/src/config.cc
@@ -405,6 +405,7 @@ md_config_t g_conf = {
   osd_min_pg_size_without_alive: 2,  // smallest pg we allow to activate without telling the monitor
 
   osd_pg_bits: 6,  // bits per osd
+  osd_lpg_bits: 1,  // bits per osd
   osd_object_layout: CEPH_OBJECT_LAYOUT_HASHINO,//LINEAR,//HASHINO,
   osd_pg_layout: CEPH_PG_LAYOUT_CRUSH,//LINEAR,//CRUSH,
   osd_min_rep: 2,
diff --git a/src/config.h b/src/config.h
index b7819c1154312..44faf4362581b 100644
--- a/src/config.h
+++ b/src/config.h
@@ -266,6 +266,7 @@ struct md_config_t {
   int osd_min_pg_size_without_alive;
 
   int   osd_pg_bits;
+  int   osd_lpg_bits;
   int   osd_object_layout;
   int   osd_pg_layout;
   int   osd_min_rep;
diff --git a/src/osd/OSDMap.cc b/src/osd/OSDMap.cc
index a686682b23471..518b234cb7ac5 100644
--- a/src/osd/OSDMap.cc
+++ b/src/osd/OSDMap.cc
@@ -20,17 +20,20 @@
 
 
 void OSDMap::build_simple(epoch_t e, ceph_fsid &fsid,
-			  int num_osd, int pg_bits, int mds_local_osd)
+			  int num_osd, int pg_bits, int lpg_bits,
+			  int mds_local_osd)
 {
   dout(10) << "build_simple on " << num_osd
-	   << " osds with " << pg_bits << " pg bits per osd" << dendl;
+	   << " osds with " << pg_bits << " pg bits per osd, "
+	   << lpg_bits << " lpg bits" << dendl;
   epoch = e;
   set_fsid(fsid);
   ctime = g_clock.now();
 
   set_max_osd(num_osd);
   pg_num = pgp_num = num_osd << pg_bits;
-
+  lpg_num = lpgp_num = lpg_bits ? (1 << (lpg_bits-1)) : 0;
+  
   // crush map
   build_simple_crush_map(crush, num_osd);
 
diff --git a/src/osd/OSDMap.h b/src/osd/OSDMap.h
index 75b526c52ab86..53faed49679bb 100644
--- a/src/osd/OSDMap.h
+++ b/src/osd/OSDMap.h
@@ -744,7 +744,8 @@ private:
    * handy helpers to build simple maps...
    */
   void build_simple(epoch_t e, ceph_fsid &fsid,
-		    int num_osd, int pg_bits, int mds_local_osd);
+		    int num_osd, int pg_bits, int lpg_bits,
+		    int mds_local_osd);
   static void build_simple_crush_map(CrushWrapper& crush, int num_osd);
 
 };
diff --git a/src/osdmaptool.cc b/src/osdmaptool.cc
index ef25fa2718162..fb9d1375b7652 100644
--- a/src/osdmaptool.cc
+++ b/src/osdmaptool.cc
@@ -60,6 +60,7 @@ int main(int argc, const char **argv)
   const char *monmapfn = 0;
   int num_osd = 0;
   int pg_bits = g_conf.osd_pg_bits;
+  int lpg_bits = g_conf.osd_lpg_bits;
   bool clobber = false;
   bool modified = false;
   const char *export_crush = 0;
@@ -75,8 +76,10 @@ int main(int argc, const char **argv)
       num_osd = atoi(args[++i]);
     } else if (strcmp(args[i], "--clobber") == 0) 
       clobber = true;
-    else if (strcmp(args[i], "--pgbits") == 0)
+    else if (strcmp(args[i], "--pg_bits") == 0)
       pg_bits = atoi(args[++i]);
+    else if (strcmp(args[i], "--lpg_bits") == 0)
+      lpg_bits = atoi(args[++i]);
     else if (strcmp(args[i], "--export-crush") == 0)
       export_crush = args[++i];
     else if (strcmp(args[i], "--import-crush") == 0)
@@ -121,7 +124,7 @@ int main(int argc, const char **argv)
       cerr << me << ": osd count must be > 0" << std::endl;
       exit(1);
     }
-    osdmap.build_simple(0, monmap.fsid, num_osd, pg_bits, 0);
+    osdmap.build_simple(0, monmap.fsid, num_osd, pg_bits, lpg_bits, 0);
     modified = true;
   }
 
-- 
2.39.5