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drbd: debugfs: expose ed_data_gen_id

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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>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Lars Ellenberg 2015-03-18 17:19:10 +01:00 committed by Jens Axboe
parent 9fa4826919
commit f5ec0173b9
2 changed files with 11 additions and 0 deletions
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10
drivers/block/drbd/drbd_debugfs.c
View File

@ -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);
}

1
drivers/block/drbd/drbd_int.h
View File

@ -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 */