From f5ec0173b92ba88c7b38e32a7ee3dd3b1568ea50 Mon Sep 17 00:00:00 2001 From: Lars Ellenberg Date: Wed, 18 Mar 2015 17:19:10 +0100 Subject: [PATCH] drbd: debugfs: expose ed_data_gen_id The effective data generation ID may be interesting for debugging purposes of scenarios involving diskless states. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe --- 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 6b88a35fb048..96a0107a72ea 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 3efaf181438c..08f266eab3ee 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 */