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Groups > linux.kernel > #1277230

[PATCH 24/38] drbd: debugfs: expose ed_data_gen_id

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From: Lars Ellenberg <lars.ellenberg@linbit.com>

The effective data generation ID may be interesting for debugging
purposes of scenarios involving diskless states.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---
 drivers/block/drbd/drbd_debugfs.c | 10 ++++++++++
 drivers/block/drbd/drbd_int.h     |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/block/drbd/drbd_debugfs.c b/drivers/block/drbd/drbd_debugfs.c
index 6b88a35..96a0107 100644
--- a/drivers/block/drbd/drbd_debugfs.c
+++ b/drivers/block/drbd/drbd_debugfs.c
@@ -771,6 +771,13 @@ static int device_data_gen_id_show(struct seq_file *m, void *ignored)
 	return 0;
 }
 
+static int device_ed_gen_id_show(struct seq_file *m, void *ignored)
+{
+	struct drbd_device *device = m->private;
+	seq_printf(m, "0x%016llX\n", (unsigned long long)device->ed_uuid);
+	return 0;
+}
+
 #define drbd_debugfs_device_attr(name)						\
 static int device_ ## name ## _open(struct inode *inode, struct file *file)	\
 {										\
@@ -796,6 +803,7 @@ drbd_debugfs_device_attr(oldest_requests)
 drbd_debugfs_device_attr(act_log_extents)
 drbd_debugfs_device_attr(resync_extents)
 drbd_debugfs_device_attr(data_gen_id)
+drbd_debugfs_device_attr(ed_gen_id)
 
 void drbd_debugfs_device_add(struct drbd_device *device)
 {
@@ -839,6 +847,7 @@ void drbd_debugfs_device_add(struct drbd_device *device)
 	DCF(act_log_extents);
 	DCF(resync_extents);
 	DCF(data_gen_id);
+	DCF(ed_gen_id);
 #undef DCF
 	return;
 
@@ -854,6 +863,7 @@ void drbd_debugfs_device_cleanup(struct drbd_device *device)
 	drbd_debugfs_remove(&device->debugfs_vol_act_log_extents);
 	drbd_debugfs_remove(&device->debugfs_vol_resync_extents);
 	drbd_debugfs_remove(&device->debugfs_vol_data_gen_id);
+	drbd_debugfs_remove(&device->debugfs_vol_ed_gen_id);
 	drbd_debugfs_remove(&device->debugfs_vol);
 }
 
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 3efaf18..08f266e 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -835,6 +835,7 @@ struct drbd_device {
 	struct dentry *debugfs_vol_act_log_extents;
 	struct dentry *debugfs_vol_resync_extents;
 	struct dentry *debugfs_vol_data_gen_id;
+	struct dentry *debugfs_vol_ed_gen_id;
 #endif
 
 	unsigned int vnr;	/* volume number within the connection */
-- 
1.9.1

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[PATCH 00/38] DRBD update Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:10 +0100
  [PATCH 24/38] drbd: debugfs: expose ed_data_gen_id Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 16/38] drbd: add comment why we want to first call local-io-error, then send state Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 05/38] drbd: Move enum write_ordering_e to drbd.h Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 38/38] drbd: fix error path during resize Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 31/38] lru_cache: Converted lc_seq_printf_status to return void Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 14/38] drbd: drbdsetup detach of an unresponsive local disk should not block IO "forever" Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 37/38] drbd: avoid potential deadlock during handshake Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 22/38] drbd: Create a dedicated workqueue for sending acks on the control connection Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 03/38] drbd: De-inline drbd_should_do_remote() and drbd_should_send_out_of_sync() Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 23/38] drbd: prevent NULL pointer deref when resuming diskless primary Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 13/38] drbd: drop remnants of connector -- we don't use it anymore in drbd 8.4 Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  [PATCH 28/38] drbd: fix spurious alert level printk Philipp Reisner <philipp.reisner@linbit.com> - 2015-11-25 12:20 +0100
  Re: [PATCH 00/38] DRBD update Jens Axboe <axboe@fb.com> - 2015-11-25 19:10 +0100

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