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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2014-05-14 20:33:05 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-07-10 18:35:21 +0200 |
| commit | cc356f85bb57a3587e4b1d944e669fe39b37cdf2 (patch) | |
| tree | a51d3e10c0ca2ef7167484e791829bd25d5b552e /drivers | |
| parent | 3d299f48a9ff82d29093578e937e83e41dc93325 (diff) | |
| download | op-kernel-dev-cc356f85bb57a3587e4b1d944e669fe39b37cdf2.zip op-kernel-dev-cc356f85bb57a3587e4b1d944e669fe39b37cdf2.tar.gz | |
drbd: debugfs: add per device data_gen_id
The data generation identifiers used to be exposed via sysfs
at /sys/block/drbdX/drbd/meta_data/data_gen_id (out-of-tree),
for advanced policy scripting.
Bring that information over to debugfs.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/drbd/drbd_debugfs.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_debugfs.c b/drivers/block/drbd/drbd_debugfs.c index db70d6c..5c20b18 100644 --- a/drivers/block/drbd/drbd_debugfs.c +++ b/drivers/block/drbd/drbd_debugfs.c @@ -760,6 +760,25 @@ static int device_oldest_requests_show(struct seq_file *m, void *ignored) return 0; } +static int device_data_gen_id_show(struct seq_file *m, void *ignored) +{ + struct drbd_device *device = m->private; + struct drbd_md *md; + enum drbd_uuid_index idx; + + if (!get_ldev_if_state(device, D_FAILED)) + return -ENODEV; + + md = &device->ldev->md; + spin_lock_irq(&md->uuid_lock); + for (idx = UI_CURRENT; idx <= UI_HISTORY_END; idx++) { + seq_printf(m, "0x%016llX\n", md->uuid[idx]); + } + spin_unlock_irq(&md->uuid_lock); + put_ldev(device); + return 0; +} + #define drbd_debugfs_device_attr(name) \ static int device_ ## name ## _open(struct inode *inode, struct file *file) \ { \ @@ -784,6 +803,7 @@ static const struct file_operations device_ ## name ## _fops = { \ 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) void drbd_debugfs_device_add(struct drbd_device *device) { @@ -826,6 +846,8 @@ void drbd_debugfs_device_add(struct drbd_device *device) DCF(oldest_requests); DCF(act_log_extents); DCF(resync_extents); + DCF(data_gen_id); +#undef DCF return; fail: |
