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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_main.c | |
| 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_main.c')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 2891631df596..b0891c3651dd 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1377,6 +1377,22 @@ int drbd_send_ack_ex(struct drbd_peer_device *peer_device, enum drbd_packet cmd, cpu_to_be64(block_id)); } +int drbd_send_rs_deallocated(struct drbd_peer_device *peer_device, + struct drbd_peer_request *peer_req) +{ + struct drbd_socket *sock; + struct p_block_desc *p; + + sock = &peer_device->connection->data; + p = drbd_prepare_command(peer_device, sock); + if (!p) + return -EIO; + p->sector = cpu_to_be64(peer_req->i.sector); + p->blksize = cpu_to_be32(peer_req->i.size); + p->pad = 0; + return drbd_send_command(peer_device, sock, P_RS_DEALLOCATED, sizeof(*p), NULL, 0); +} + int drbd_send_drequest(struct drbd_peer_device *peer_device, int cmd, sector_t sector, int size, u64 block_id) { @@ -3683,6 +3699,8 @@ const char *cmdname(enum drbd_packet cmd) [P_CONN_ST_CHG_REPLY] = "conn_st_chg_reply", [P_RETRY_WRITE] = "retry_write", [P_PROTOCOL_UPDATE] = "protocol_update", + [P_RS_THIN_REQ] = "rs_thin_req", + [P_RS_DEALLOCATED] = "rs_deallocated", /* enum drbd_packet, but not commands - obsoleted flags: * P_MAY_IGNORE |