diff options
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 9 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 25 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 11 |
3 files changed, 39 insertions, 6 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index c194348a46e..e9654c8d5b6 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -943,7 +943,8 @@ struct drbd_conf { struct drbd_work resync_work, unplug_work, md_sync_work, - delay_probe_work; + delay_probe_work, + uuid_work; struct timer_list resync_timer; struct timer_list md_sync_timer; struct timer_list delay_probe_timer; @@ -1068,6 +1069,7 @@ struct drbd_conf { struct timeval dps_time; /* delay-probes-start-time */ unsigned int dp_volume_last; /* send_cnt of last delay probe */ int c_sync_rate; /* current resync rate after delay_probe magic */ + atomic_t new_c_uuid; }; static inline struct drbd_conf *minor_to_mdev(unsigned int minor) @@ -2217,6 +2219,8 @@ static inline int __inc_ap_bio_cond(struct drbd_conf *mdev) return 0; if (test_bit(BITMAP_IO, &mdev->flags)) return 0; + if (atomic_read(&mdev->new_c_uuid)) + return 0; return 1; } @@ -2237,6 +2241,9 @@ static inline void inc_ap_bio(struct drbd_conf *mdev, int count) * to avoid races with the reconnect code, * we need to atomic_inc within the spinlock. */ + if (atomic_read(&mdev->new_c_uuid) && atomic_add_unless(&mdev->new_c_uuid, -1, 1)) + drbd_queue_work_front(&mdev->data.work, &mdev->uuid_work); + spin_lock_irq(&mdev->req_lock); while (!__inc_ap_bio_cond(mdev)) { prepare_to_wait(&mdev->misc_wait, &wait, TASK_UNINTERRUPTIBLE); diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index d0fabace145..c144509011b 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1217,17 +1217,16 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, mdev->p_uuid = NULL; if (get_ldev(mdev)) { if ((ns.role == R_PRIMARY || ns.peer == R_PRIMARY) && - mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) { - drbd_uuid_new_current(mdev); - drbd_send_uuids(mdev); - } + mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) + atomic_set(&mdev->new_c_uuid, 2); put_ldev(mdev); } } if (ns.pdsk < D_INCONSISTENT && get_ldev(mdev)) { + /* Diskless peer becomes primary or got connected do diskless, primary peer. */ if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0) - drbd_uuid_new_current(mdev); + atomic_set(&mdev->new_c_uuid, 2); /* D_DISKLESS Peer becomes secondary */ if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY) @@ -1351,6 +1350,19 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, drbd_md_sync(mdev); } +static int w_new_current_uuid(struct drbd_conf *mdev, struct drbd_work *w, int cancel) +{ + if (get_ldev(mdev)) { + drbd_uuid_new_current(mdev); + drbd_send_uuids(mdev); + drbd_md_sync(mdev); + put_ldev(mdev); + } + atomic_dec(&mdev->new_c_uuid); + wake_up(&mdev->misc_wait); + + return 1; +} static int drbd_thread_setup(void *arg) { @@ -2691,6 +2703,7 @@ void drbd_init_set_defaults(struct drbd_conf *mdev) atomic_set(&mdev->net_cnt, 0); atomic_set(&mdev->packet_seq, 0); atomic_set(&mdev->pp_in_use, 0); + atomic_set(&mdev->new_c_uuid, 0); mutex_init(&mdev->md_io_mutex); mutex_init(&mdev->data.mutex); @@ -2721,12 +2734,14 @@ void drbd_init_set_defaults(struct drbd_conf *mdev) INIT_LIST_HEAD(&mdev->bm_io_work.w.list); INIT_LIST_HEAD(&mdev->delay_probes); INIT_LIST_HEAD(&mdev->delay_probe_work.list); + INIT_LIST_HEAD(&mdev->uuid_work.list); mdev->resync_work.cb = w_resync_inactive; mdev->unplug_work.cb = w_send_write_hint; mdev->md_sync_work.cb = w_md_sync; mdev->bm_io_work.w.cb = w_bitmap_io; mdev->delay_probe_work.cb = w_delay_probes; + mdev->uuid_work.cb = w_new_current_uuid; init_timer(&mdev->resync_timer); init_timer(&mdev->md_sync_timer); init_timer(&mdev->delay_probe_timer); diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index a04ec01ab3c..461d9872d4d 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1150,6 +1150,17 @@ int drbd_submit_ee(struct drbd_conf *mdev, struct drbd_epoch_entry *e, unsigned n_bios = 0; unsigned nr_pages = (ds + PAGE_SIZE -1) >> PAGE_SHIFT; + if (atomic_read(&mdev->new_c_uuid)) { + if (atomic_add_unless(&mdev->new_c_uuid, -1, 1)) { + drbd_uuid_new_current(mdev); + drbd_md_sync(mdev); + + atomic_dec(&mdev->new_c_uuid); + wake_up(&mdev->misc_wait); + } + wait_event(mdev->misc_wait, !atomic_read(&mdev->new_c_uuid)); + } + /* In most cases, we will only need one bio. But in case the lower * level restrictions happen to be different at this offset on this * side than those of the sending peer, we may need to submit the |