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drbd: use dynamic_dev_dbg to optionally log uuid changes 

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Lars Ellenberg 2010-10-07 15:18:08 +02:00 committed by Philipp Reisner
parent be70e2671b
commit ac7241211d
1 changed files with 31 additions and 1 deletions
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32
drivers/block/drbd/drbd_main.c
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@ -3557,6 +3557,28 @@ int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
return rv;
}
static void debug_drbd_uuid(struct drbd_conf *mdev, enum drbd_uuid_index index)
{
static char *uuid_str[UI_EXTENDED_SIZE] = {
[UI_CURRENT] = "CURRENT",
[UI_BITMAP] = "BITMAP",
[UI_HISTORY_START] = "HISTORY_START",
[UI_HISTORY_END] = "HISTORY_END",
[UI_SIZE] = "SIZE",
[UI_FLAGS] = "FLAGS",
};
if (index >= UI_EXTENDED_SIZE) {
dev_warn(DEV, " uuid_index >= EXTENDED_SIZE\n");
return;
}
dynamic_dev_dbg(DEV, " uuid[%s] now %016llX\n",
uuid_str[index],
(unsigned long long)mdev->ldev->md.uuid[index]);
}
/**
* drbd_md_mark_dirty() - Mark meta data super block as dirty
* @mdev: DRBD device.
@ -3586,8 +3608,10 @@ static void drbd_uuid_move_history(struct drbd_conf *mdev) __must_hold(local)
{
int i;
for (i = UI_HISTORY_START; i < UI_HISTORY_END; i++)
for (i = UI_HISTORY_START; i < UI_HISTORY_END; i++) {
mdev->ldev->md.uuid[i+1] = mdev->ldev->md.uuid[i];
debug_drbd_uuid(mdev, i+1);
}
}
void _drbd_uuid_set(struct drbd_conf *mdev, int idx, u64 val) __must_hold(local)
@ -3602,6 +3626,7 @@ void _drbd_uuid_set(struct drbd_conf *mdev, int idx, u64 val) __must_hold(local)
}
mdev->ldev->md.uuid[idx] = val;
debug_drbd_uuid(mdev, idx);
drbd_md_mark_dirty(mdev);
}
@ -3611,6 +3636,7 @@ void drbd_uuid_set(struct drbd_conf *mdev, int idx, u64 val) __must_hold(local)
if (mdev->ldev->md.uuid[idx]) {
drbd_uuid_move_history(mdev);
mdev->ldev->md.uuid[UI_HISTORY_START] = mdev->ldev->md.uuid[idx];
debug_drbd_uuid(mdev, UI_HISTORY_START);
}
_drbd_uuid_set(mdev, idx, val);
}
@ -3629,6 +3655,7 @@ void drbd_uuid_new_current(struct drbd_conf *mdev) __must_hold(local)
dev_info(DEV, "Creating new current UUID\n");
D_ASSERT(mdev->ldev->md.uuid[UI_BITMAP] == 0);
mdev->ldev->md.uuid[UI_BITMAP] = mdev->ldev->md.uuid[UI_CURRENT];
debug_drbd_uuid(mdev, UI_BITMAP);
get_random_bytes(&val, sizeof(u64));
_drbd_uuid_set(mdev, UI_CURRENT, val);
@ -3643,6 +3670,8 @@ void drbd_uuid_set_bm(struct drbd_conf *mdev, u64 val) __must_hold(local)
drbd_uuid_move_history(mdev);
mdev->ldev->md.uuid[UI_HISTORY_START] = mdev->ldev->md.uuid[UI_BITMAP];
mdev->ldev->md.uuid[UI_BITMAP] = 0;
debug_drbd_uuid(mdev, UI_HISTORY_START);
debug_drbd_uuid(mdev, UI_BITMAP);
} else {
if (mdev->ldev->md.uuid[UI_BITMAP])
dev_warn(DEV, "bm UUID already set");
@ -3650,6 +3679,7 @@ void drbd_uuid_set_bm(struct drbd_conf *mdev, u64 val) __must_hold(local)
mdev->ldev->md.uuid[UI_BITMAP] = val;
mdev->ldev->md.uuid[UI_BITMAP] &= ~((u64)1);
debug_drbd_uuid(mdev, UI_BITMAP);
}
drbd_md_mark_dirty(mdev);
}