md: Don't let implementation detail of curr_resync leak out through sysfs.

mddev->curr_resync has artificial values of '1' and '2' which are used
by the code which ensures only one resync is happening at a time on
any given device.

These values are internal and should never be exposed to user-space
(except when translated appropriately as in the 'pending' status in
/proc/mdstat).

Unfortunately they are as ->curr_resync is assigned to
->curr_resync_completed and that value is directly visible through
sysfs.

So change the assignments to ->curr_resync_completed to get the same
valued from elsewhere in a form that doesn't have the magic '1' or '2'
values.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 6cf5871..9a35320 100644 (file)
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1546,7 +1546,7 @@ void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector)
        wait_event(bitmap->mddev->recovery_wait,
                   atomic_read(&bitmap->mddev->recovery_active) == 0);
 
-       bitmap->mddev->curr_resync_completed = bitmap->mddev->curr_resync;
+       bitmap->mddev->curr_resync_completed = sector;
        set_bit(MD_CHANGE_CLEAN, &bitmap->mddev->flags);
        sector &= ~((1ULL << CHUNK_BLOCK_SHIFT(bitmap)) - 1);
        s = 0;

diff --git a/drivers/md/md.c b/drivers/md/md.c
index b98a85f..42b1d9e 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6824,7 +6824,7 @@ void md_do_sync(mddev_t *mddev)
                       desc, mdname(mddev));
                mddev->curr_resync = j;
        }
-       mddev->curr_resync_completed = mddev->curr_resync;
+       mddev->curr_resync_completed = j;
 
        while (j < max_sectors) {
                sector_t sectors;
@@ -6842,8 +6842,7 @@ void md_do_sync(mddev_t *mddev)
                        md_unplug(mddev);
                        wait_event(mddev->recovery_wait,
                                   atomic_read(&mddev->recovery_active) == 0);
-                       mddev->curr_resync_completed =
-                               mddev->curr_resync;
+                       mddev->curr_resync_completed = j;
                        set_bit(MD_CHANGE_CLEAN, &mddev->flags);
                        sysfs_notify(&mddev->kobj, NULL, "sync_completed");
                }

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 9212c07..d223a6c 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4236,7 +4236,7 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped
                wait_event(conf->wait_for_overlap,
                           atomic_read(&conf->reshape_stripes)==0);
                mddev->reshape_position = conf->reshape_progress;
-               mddev->curr_resync_completed = mddev->curr_resync;
+               mddev->curr_resync_completed = sector_nr;
                conf->reshape_checkpoint = jiffies;
                set_bit(MD_CHANGE_DEVS, &mddev->flags);
                md_wakeup_thread(mddev->thread);
@@ -4337,7 +4337,7 @@ static sector_t reshape_request(mddev_t *mddev, sector_t sector_nr, int *skipped
                wait_event(conf->wait_for_overlap,
                           atomic_read(&conf->reshape_stripes) == 0);
                mddev->reshape_position = conf->reshape_progress;
-               mddev->curr_resync_completed = mddev->curr_resync + reshape_sectors;
+               mddev->curr_resync_completed = sector_nr;
                conf->reshape_checkpoint = jiffies;
                set_bit(MD_CHANGE_DEVS, &mddev->flags);
                md_wakeup_thread(mddev->thread);