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path: root/drivers/block/drbd/drbd_protocol.h
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Diffstat (limited to 'drivers/block/drbd/drbd_protocol.h')
-rw-r--r--drivers/block/drbd/drbd_protocol.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_protocol.h b/drivers/block/drbd/drbd_protocol.h
index 3c04ec0ea333..2da9104a3851 100644
--- a/drivers/block/drbd/drbd_protocol.h
+++ b/drivers/block/drbd/drbd_protocol.h
@@ -54,6 +54,11 @@ enum drbd_packet {
P_CONN_ST_CHG_REPLY = 0x2b, /* meta sock: Connection side state req reply */
P_RETRY_WRITE = 0x2c, /* Protocol C: retry conflicting write request */
P_PROTOCOL_UPDATE = 0x2d, /* data sock: is used in established connections */
+ /* 0x2e to 0x30 reserved, used in drbd 9 */
+
+ /* REQ_DISCARD. We used "discard" in different contexts before,
+ * which is why I chose TRIM here, to disambiguate. */
+ P_TRIM = 0x31,
P_MAY_IGNORE = 0x100, /* Flag to test if (cmd > P_MAY_IGNORE) ... */
P_MAX_OPT_CMD = 0x101,
@@ -119,6 +124,11 @@ struct p_data {
u32 dp_flags;
} __packed;
+struct p_trim {
+ struct p_data p_data;
+ u32 size; /* == bio->bi_size */
+} __packed;
+
/*
* commands which share a struct:
* p_block_ack:
@@ -150,6 +160,8 @@ struct p_block_req {
* ReportParams
*/
+#define FF_TRIM 1
+
struct p_connection_features {
u32 protocol_min;
u32 feature_flags;