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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2010-10-07 15:18:08 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2010-10-15 10:52:42 +0200 |
| commit | ac7241211ded714873e8dc6d2f7c98ae7ea2cc30 (patch) | |
| tree | 9faa8e0012c9543978cc09654c9a5a3eac00057d /drivers/block | |
| parent | be70e2671b95a8982ff133ebaafff6399ad393d4 (diff) | |
| download | linux-ac7241211ded714873e8dc6d2f7c98ae7ea2cc30.tar.bz2 | |
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>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 2e6a07e3848d..bbe3bff2cad6 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -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); } |