drbd: New sync_param packet, that includes the parameters of the new controller

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

4 files changed, 37 insertions, 8 deletions

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index f84ffb17a7e5..fd2cdd45f155 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -451,6 +451,17 @@ struct p_rs_param_89 {
         char csums_alg[SHARED_SECRET_MAX];
 } __packed;
 
+struct p_rs_param_95 {
+        struct p_header head;
+        u32 rate;
+        char verify_alg[SHARED_SECRET_MAX];
+        char csums_alg[SHARED_SECRET_MAX];
+        u32 c_plan_ahead;
+        u32 c_delay_target;
+        u32 c_fill_target;
+        u32 c_max_rate;
+} __packed;
+
 enum drbd_conn_flags {
         CF_WANT_LOSE = 1,
         CF_DRY_RUN = 2,
@@ -610,6 +621,7 @@ union p_polymorph {
         struct p_barrier         barrier;
         struct p_barrier_ack     barrier_ack;
         struct p_rs_param_89     rs_param_89;
+        struct p_rs_param_95     rs_param_95;
         struct p_protocol        protocol;
         struct p_sizes           sizes;
         struct p_uuids           uuids;
@@ -1268,6 +1280,8 @@ struct bm_extent {
  * Bit 1 ==> local node thinks this block needs to be synced.
  */
 
+#define SLEEP_TIME (HZ/10)
+
 #define BM_BLOCK_SHIFT  12                       /* 4k per bit */
 #define BM_BLOCK_SIZE    (1<<BM_BLOCK_SHIFT)
 /* (9+3) : 512 bytes @ 8 bits; representing 16M storage
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 5a484c1f5ce7..bff4f598d38f 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1713,7 +1713,7 @@ int drbd_send_cmd2(struct drbd_conf *mdev, enum drbd_packets cmd, char *data,
 
 int drbd_send_sync_param(struct drbd_conf *mdev, struct syncer_conf *sc)
 {
-        struct p_rs_param_89 *p;
+        struct p_rs_param_95 *p;
         struct socket *sock;
         int size, rv;
         const int apv = mdev->agreed_pro_version;
@@ -1721,7 +1721,8 @@ int drbd_send_sync_param(struct drbd_conf *mdev, struct syncer_conf *sc)
         size = apv <= 87 ? sizeof(struct p_rs_param)
                 : apv == 88 ? sizeof(struct p_rs_param)
                         + strlen(mdev->sync_conf.verify_alg) + 1
-                : /* 89 */    sizeof(struct p_rs_param_89);
+                : apv <= 94 ? sizeof(struct p_rs_param_89)
+                : /* apv >= 95 */ sizeof(struct p_rs_param_95);
 
         /* used from admin command context and receiver/worker context.
          * to avoid kmalloc, grab the socket right here,
@@ -1732,12 +1733,16 @@ int drbd_send_sync_param(struct drbd_conf *mdev, struct syncer_conf *sc)
         if (likely(sock != NULL)) {
                 enum drbd_packets cmd = apv >= 89 ? P_SYNC_PARAM89 : P_SYNC_PARAM;
 
-                p = &mdev->data.sbuf.rs_param_89;
+                p = &mdev->data.sbuf.rs_param_95;
 
                 /* initialize verify_alg and csums_alg */
                 memset(p->verify_alg, 0, 2 * SHARED_SECRET_MAX);
 
                 p->rate = cpu_to_be32(sc->rate);
+                p->c_plan_ahead = cpu_to_be32(sc->c_plan_ahead);
+                p->c_delay_target = cpu_to_be32(sc->c_delay_target);
+                p->c_fill_target = cpu_to_be32(sc->c_fill_target);
+                p->c_max_rate = cpu_to_be32(sc->c_max_rate);
 
                 if (apv >= 88)
                         strcpy(p->verify_alg, mdev->sync_conf.verify_alg);
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 5e49ee75d3c9..34bea972f734 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -2805,7 +2805,7 @@ struct crypto_hash *drbd_crypto_alloc_digest_safe(const struct drbd_conf *mdev,
 static int receive_SyncParam(struct drbd_conf *mdev, struct p_header *h)
 {
         int ok = TRUE;
-        struct p_rs_param_89 *p = (struct p_rs_param_89 *)h;
+        struct p_rs_param_95 *p = (struct p_rs_param_95 *)h;
         unsigned int header_size, data_size, exp_max_sz;
         struct crypto_hash *verify_tfm = NULL;
         struct crypto_hash *csums_tfm = NULL;
@@ -2814,7 +2814,8 @@ static int receive_SyncParam(struct drbd_conf *mdev, struct p_header *h)
         exp_max_sz  = apv <= 87 ? sizeof(struct p_rs_param)
                     : apv == 88 ? sizeof(struct p_rs_param)
                                         + SHARED_SECRET_MAX
-                    : /* 89 */    sizeof(struct p_rs_param_89);
+                    : apv <= 94 ? sizeof(struct p_rs_param_89)
+                    : /* apv >= 95 */ sizeof(struct p_rs_param_95);
 
         if (h->length > exp_max_sz) {
                 dev_err(DEV, "SyncParam packet too long: received %u, expected <= %u bytes\n",
@@ -2825,10 +2826,14 @@ static int receive_SyncParam(struct drbd_conf *mdev, struct p_header *h)
         if (apv <= 88) {
                 header_size = sizeof(struct p_rs_param) - sizeof(*h);
                 data_size   = h->length  - header_size;
-        } else /* apv >= 89 */ {
+        } else if (apv <= 94) {
                 header_size = sizeof(struct p_rs_param_89) - sizeof(*h);
                 data_size   = h->length  - header_size;
                 D_ASSERT(data_size == 0);
+        } else {
+                header_size = sizeof(struct p_rs_param_95) - sizeof(*h);
+                data_size   = h->length  - header_size;
+                D_ASSERT(data_size == 0);
         }
 
         /* initialize verify_alg and csums_alg */
@@ -2893,6 +2898,13 @@ static int receive_SyncParam(struct drbd_conf *mdev, struct p_header *h)
                         }
                 }
 
+                if (apv > 94) {
+                        mdev->sync_conf.rate      = be32_to_cpu(p->rate);
+                        mdev->sync_conf.c_plan_ahead = be32_to_cpu(p->c_plan_ahead);
+                        mdev->sync_conf.c_delay_target = be32_to_cpu(p->c_delay_target);
+                        mdev->sync_conf.c_fill_target = be32_to_cpu(p->c_fill_target);
+                        mdev->sync_conf.c_max_rate = be32_to_cpu(p->c_max_rate);
+                }
 
                 spin_lock(&mdev->peer_seq_lock);
                 /* lock against drbd_nl_syncer_conf() */
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 3c1e88480d37..d94720f4bd07 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -39,8 +39,6 @@
 #include "drbd_int.h"
 #include "drbd_req.h"
 
-#define SLEEP_TIME (HZ/10)
-
 static int w_make_ov_request(struct drbd_conf *mdev, struct drbd_work *w, int cancel);