drbd: detach from frozen backing device
* drbd-8.3:
documentation: Documented detach's --force and disk's --disk-timeout
drbd: Implemented the disk-timeout option
drbd: Force flag for the detach operation
drbd: Allow new IOs while the local disk in in FAILED state
drbd: Bitmap IO functions can not return prematurely if the disk breaks
drbd: Added a kref to bm_aio_ctx
drbd: Hold a reference to ldev while doing meta-data IO
drbd: Keep a reference to the bio until the completion handler finished
drbd: Implemented wait_until_done_or_disk_failure()
drbd: Replaced md_io_mutex by an atomic: md_io_in_use
drbd: moved md_io into mdev
drbd: Immediately allow completion of IOs, that wait for IO completions on a failed disk
drbd: Keep a reference to barrier acked requests
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 97d1dab..bf8d0b0 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1236,6 +1236,7 @@
synchronize_rcu();
kfree(old_disk_conf);
kfree(old_plan);
+ mod_timer(&mdev->request_timer, jiffies + HZ);
goto success;
fail_unlock:
@@ -1628,6 +1629,8 @@
if (rv < SS_SUCCESS)
goto force_diskless_dec;
+ mod_timer(&mdev->request_timer, jiffies + HZ);
+
if (mdev->state.role == R_PRIMARY)
mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
else
@@ -1667,10 +1670,17 @@
return 0;
}
-static int adm_detach(struct drbd_conf *mdev)
+static int adm_detach(struct drbd_conf *mdev, int force)
{
enum drbd_state_rv retcode;
int ret;
+
+ if (force) {
+ drbd_force_state(mdev, NS(disk, D_FAILED));
+ retcode = SS_SUCCESS;
+ goto out;
+ }
+
drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */
retcode = drbd_request_state(mdev, NS(disk, D_FAILED));
/* D_FAILED will transition to DISKLESS. */
@@ -1681,6 +1691,7 @@
retcode = SS_NOTHING_TO_DO;
if (ret)
retcode = ERR_INTR;
+out:
return retcode;
}
@@ -1692,6 +1703,8 @@
int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info)
{
enum drbd_ret_code retcode;
+ struct detach_parms parms = { };
+ int err;
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
if (!adm_ctx.reply_skb)
@@ -1699,7 +1712,16 @@
if (retcode != NO_ERROR)
goto out;
- retcode = adm_detach(adm_ctx.mdev);
+ if (info->attrs[DRBD_NLA_DETACH_PARMS]) {
+ err = detach_parms_from_attrs(&parms, info);
+ if (err) {
+ retcode = ERR_MANDATORY_TAG;
+ drbd_msg_put_info(from_attrs_err_to_txt(err));
+ goto out;
+ }
+ }
+
+ retcode = adm_detach(adm_ctx.mdev, parms.force_detach);
out:
drbd_adm_finish(info, retcode);
return 0;
@@ -3116,7 +3138,7 @@
/* detach */
idr_for_each_entry(&adm_ctx.tconn->volumes, mdev, i) {
- retcode = adm_detach(mdev);
+ retcode = adm_detach(mdev, 0);
if (retcode < SS_SUCCESS) {
drbd_msg_put_info("failed to detach");
goto out;
