[Devel] [PATCH RHEL7 COMMIT] ploop: Introduce data_off_in_clusters() helper

[Konstantin Khorenko]

The commit is pushed to "branch-rh7-3.10.0-957.10.1.vz7.85.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-957.10.1.vz7.85.5
------>
commit 0ee4c340b6261e99f0fa025d742a70e8af122981
Author: Kirill Tkhai <ktkhai at virtuozzo.com>
Date:   Thu Mar 28 12:37:40 2019 +0300

    ploop: Introduce data_off_in_clusters() helper
    
    Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
    
    =====================
    Patchset description:
    
    ploop: Discard with zeroing of ploop1 indexes support
    
    https://jira.sw.ru/browse/PSBM-92367
    https://pmc.acronis.com/browse/VSTOR-19972
    
    Kirill Tkhai (10):
          ploop: Export map defines to separate header file
          ploop: Make submit_alloc() return int value
          ploop: Introduce ploop_submit_alloc() helper
          ploop: Prohibit discard ioctls
          ploop: Prohibit PLOOP_IOC_UPDATE_INDEX on singular list
          ploop: Introduce data_off_in_clusters() helper
          ploop: Add .complete_merge method
          ploop: Zero indexes on discard
          ploop: Fallocate cluster in cached_submit() during hole reuse
          ploop: Populate and maintain holes bitmap
---
 drivers/block/ploop/fmt_ploop1.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/block/ploop/fmt_ploop1.c b/drivers/block/ploop/fmt_ploop1.c
index eea15aac8790..370aa6369a8a 100644
--- a/drivers/block/ploop/fmt_ploop1.c
+++ b/drivers/block/ploop/fmt_ploop1.c
@@ -25,6 +25,13 @@ struct ploop1_private
 	sector_t	l1_off;
 };
 
+static unsigned int data_off_in_clusters(struct ploop_delta *delta)
+{
+	struct ploop1_private *ph = delta->priv;
+
+	return (ph->l1_off >> delta->cluster_log);
+}
+
 int ploop1_map_index(struct ploop_delta * delta, unsigned long block, sector_t *sec)
 {
 	struct ploop1_private * ph = delta->priv;