ocfs2/cluster: Show pin state for each o2hb region

[mv-sheeva.git] / fs / ocfs2 / cluster / heartbeat.c

diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index ad2e41d6879d542e9ed4a744bbe946df1ebeefeb..3722e3850a1f94ae6cf652437da21bb33f926767 100644 (file)
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -82,6 +82,7 @@ static unsigned long o2hb_failed_region_bitmap[BITS_TO_LONGS(O2NM_MAX_REGIONS)];
 #define O2HB_DB_TYPE_REGION_LIVENODES  4
 #define O2HB_DB_TYPE_REGION_NUMBER     5
 #define O2HB_DB_TYPE_REGION_ELAPSED_TIME       6
+#define O2HB_DB_TYPE_REGION_PINNED     7
 struct o2hb_debug_buf {
        int db_type;
        int db_size;
@@ -101,6 +102,7 @@ static struct o2hb_debug_buf *o2hb_db_failedregions;
 #define O2HB_DEBUG_FAILEDREGIONS       "failed_regions"
 #define O2HB_DEBUG_REGION_NUMBER       "num"
 #define O2HB_DEBUG_REGION_ELAPSED_TIME "elapsed_time_in_ms"
+#define O2HB_DEBUG_REGION_PINNED       "pinned"
 
 static struct dentry *o2hb_debug_dir;
 static struct dentry *o2hb_debug_livenodes;
@@ -241,9 +243,11 @@ struct o2hb_region {
        struct dentry           *hr_debug_livenodes;
        struct dentry           *hr_debug_regnum;
        struct dentry           *hr_debug_elapsed_time;
+       struct dentry           *hr_debug_pinned;
        struct o2hb_debug_buf   *hr_db_livenodes;
        struct o2hb_debug_buf   *hr_db_regnum;
        struct o2hb_debug_buf   *hr_db_elapsed_time;
+       struct o2hb_debug_buf   *hr_db_pinned;
 
        /* let the person setting up hb wait for it to return until it
         * has reached a 'steady' state.  This will be fixed when we have
@@ -1180,6 +1184,12 @@ static int o2hb_debug_open(struct inode *inode, struct file *file)
                                                 reg->hr_last_timeout_start));
                goto done;
 
+       case O2HB_DB_TYPE_REGION_PINNED:
+               reg = (struct o2hb_region *)db->db_data;
+               out += snprintf(buf + out, PAGE_SIZE - out, "%u\n",
+                               !!reg->hr_item_pinned);
+               goto done;
+
        default:
                goto done;
        }
@@ -1424,6 +1434,7 @@ static void o2hb_region_release(struct config_item *item)
        debugfs_remove(reg->hr_debug_livenodes);
        debugfs_remove(reg->hr_debug_regnum);
        debugfs_remove(reg->hr_debug_elapsed_time);
+       debugfs_remove(reg->hr_debug_pinned);
        debugfs_remove(reg->hr_debug_dir);
 
        spin_lock(&o2hb_live_lock);
@@ -1988,6 +1999,18 @@ static int o2hb_debug_region_init(struct o2hb_region *reg, struct dentry *dir)
                goto bail;
        }
 
+       reg->hr_debug_pinned =
+                       o2hb_debug_create(O2HB_DEBUG_REGION_PINNED,
+                                         reg->hr_debug_dir,
+                                         &(reg->hr_db_pinned),
+                                         sizeof(*(reg->hr_db_pinned)),
+                                         O2HB_DB_TYPE_REGION_PINNED,
+                                         0, 0, reg);
+       if (!reg->hr_debug_pinned) {
+               mlog_errno(ret);
+               goto bail;
+       }
+
        ret = 0;
 bail:
        return ret;