Commit cb0586bd authored by Sunil Mushran's avatar Sunil Mushran Committed by Joel Becker
Browse files

ocfs2/cluster: Show pin state for each o2hb region 



This patch adds a per o2hb region debugfs file that shows whether that region
is pinned or not.

Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
parent 58a3158a

fs/ocfs2/cluster/heartbeat.c

+23 −0
Original line number Diff line number Diff line
@@ -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;