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| author | Philipp Reisner | 2016-06-14 00:26:13 +0200 |
|---|---|---|
| committer | Jens Axboe | 2016-06-14 05:43:04 +0200 |
| commit | 700ca8c04a0f4402f379055eec97351e0d6c0087 (patch) | |
| tree | c69ed1d2afe9c805a018e04baec8694043b9882b /drivers/block/drbd/drbd_int.h | |
| parent | drbd: Kill code duplication (diff) | |
| download | kernel-qcow2-linux-700ca8c04a0f4402f379055eec97351e0d6c0087.tar.gz kernel-qcow2-linux-700ca8c04a0f4402f379055eec97351e0d6c0087.tar.xz kernel-qcow2-linux-700ca8c04a0f4402f379055eec97351e0d6c0087.zip | |
drbd: Implement handling of thinly provisioned storage on resync target nodes
If during resync we read only zeroes for a range of sectors assume
that these secotors can be discarded on the sync target node.
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_int.h')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 33f0b827757d..9e338ecca7dd 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -471,6 +471,9 @@ enum { /* this originates from application on peer * (not some resync or verify or other DRBD internal request) */ __EE_APPLICATION, + + /* If it contains only 0 bytes, send back P_RS_DEALLOCATED */ + __EE_RS_THIN_REQ, }; #define EE_CALL_AL_COMPLETE_IO (1<<__EE_CALL_AL_COMPLETE_IO) #define EE_MAY_SET_IN_SYNC (1<<__EE_MAY_SET_IN_SYNC) @@ -485,6 +488,7 @@ enum { #define EE_SUBMITTED (1<<__EE_SUBMITTED) #define EE_WRITE (1<<__EE_WRITE) #define EE_APPLICATION (1<<__EE_APPLICATION) +#define EE_RS_THIN_REQ (1<<__EE_RS_THIN_REQ) /* flag bits per device */ enum { @@ -1123,6 +1127,7 @@ extern int drbd_send_ov_request(struct drbd_peer_device *, sector_t sector, int extern int drbd_send_bitmap(struct drbd_device *device); extern void drbd_send_sr_reply(struct drbd_peer_device *, enum drbd_state_rv retcode); extern void conn_send_sr_reply(struct drbd_connection *connection, enum drbd_state_rv retcode); +extern int drbd_send_rs_deallocated(struct drbd_peer_device *, struct drbd_peer_request *); extern void drbd_backing_dev_free(struct drbd_device *device, struct drbd_backing_dev *ldev); extern void drbd_device_cleanup(struct drbd_device *device); void drbd_print_uuids(struct drbd_device *device, const char *text); |