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| author | Andreas Gruenbacher <agruen@linbit.com> | 2014-08-14 18:33:30 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-11-25 09:22:00 -0700 |
| commit | 28bc3b8c71cda033a4c013131c635d1148889824 (patch) | |
| tree | ceb03e905cdee0d06cd169f8affe46f722fd14d8 /drivers/block/drbd/drbd_state.h | |
| parent | 1ec317d3d1f9b9ec19926fdf2fc59fa3ec8cd15d (diff) | |
| download | blackbird-op-linux-28bc3b8c71cda033a4c013131c635d1148889824.tar.gz blackbird-op-linux-28bc3b8c71cda033a4c013131c635d1148889824.zip | |
drbd: Fix locking across all resources
Instead of using a rwlock for synchronizing state changes across
resources, take the request locks of all resources for global state
changes. Use resources_mutex to serialize global state changes.
This means that taking the request lock of a resource is now enough to
prevent changes of that resource. (Previously, a read lock on the
global state lock was needed as well.)
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/drbd/drbd_state.h')
| -rw-r--r-- | drivers/block/drbd/drbd_state.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/block/drbd/drbd_state.h b/drivers/block/drbd/drbd_state.h index 7f53c40823cd..bd989536f888 100644 --- a/drivers/block/drbd/drbd_state.h +++ b/drivers/block/drbd/drbd_state.h @@ -122,9 +122,9 @@ extern enum drbd_state_rv _drbd_request_state_holding_state_mutex(struct drbd_device *, union drbd_state, union drbd_state, enum chg_state_flags); -extern enum drbd_state_rv __drbd_set_state(struct drbd_device *, union drbd_state, - enum chg_state_flags, - struct completion *done); +extern enum drbd_state_rv _drbd_set_state(struct drbd_device *, union drbd_state, + enum chg_state_flags, + struct completion *done); extern void print_st_err(struct drbd_device *, union drbd_state, union drbd_state, int); |
