]> git.karo-electronics.de Git - karo-tx-linux.git/blobdiff - drivers/block/drbd/drbd_receiver.c
drbd: moved req_lock and transfer log from mdev to tconn
[karo-tx-linux.git] / drivers / block / drbd / drbd_receiver.c
index e5e7dd1c6dd8fb1d729cde107c4a5ecd294128c7..af968a0bae077ec134cb90bc32489d34554570c2 100644 (file)
@@ -210,9 +210,9 @@ static void drbd_kick_lo_and_reclaim_net(struct drbd_conf *mdev)
        LIST_HEAD(reclaimed);
        struct drbd_epoch_entry *e, *t;
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        reclaim_net_ee(mdev, &reclaimed);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        list_for_each_entry_safe(e, t, &reclaimed, w.list)
                drbd_free_net_ee(mdev, e);
@@ -269,7 +269,7 @@ static struct page *drbd_pp_alloc(struct drbd_conf *mdev, unsigned number, bool
 }
 
 /* Must not be used from irq, as that may deadlock: see drbd_pp_alloc.
- * Is also used from inside an other spin_lock_irq(&mdev->req_lock);
+ * Is also used from inside an other spin_lock_irq(&mdev->tconn->req_lock);
  * Either links the page chain back to the global pool,
  * or returns all pages to the system. */
 static void drbd_pp_free(struct drbd_conf *mdev, struct page *page, int is_net)
@@ -371,9 +371,9 @@ int drbd_release_ee(struct drbd_conf *mdev, struct list_head *list)
        int count = 0;
        int is_net = list == &mdev->net_ee;
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        list_splice_init(list, &work_list);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        list_for_each_entry_safe(e, t, &work_list, w.list) {
                drbd_free_some_ee(mdev, e, is_net);
@@ -399,10 +399,10 @@ static int drbd_process_done_ee(struct drbd_conf *mdev)
        struct drbd_epoch_entry *e, *t;
        int ok = (mdev->state.conn >= C_WF_REPORT_PARAMS);
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        reclaim_net_ee(mdev, &reclaimed);
        list_splice_init(&mdev->done_ee, &work_list);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        list_for_each_entry_safe(e, t, &reclaimed, w.list)
                drbd_free_net_ee(mdev, e);
@@ -429,18 +429,18 @@ void _drbd_wait_ee_list_empty(struct drbd_conf *mdev, struct list_head *head)
         * and calling prepare_to_wait in the fast path */
        while (!list_empty(head)) {
                prepare_to_wait(&mdev->ee_wait, &wait, TASK_UNINTERRUPTIBLE);
-               spin_unlock_irq(&mdev->req_lock);
+               spin_unlock_irq(&mdev->tconn->req_lock);
                io_schedule();
                finish_wait(&mdev->ee_wait, &wait);
-               spin_lock_irq(&mdev->req_lock);
+               spin_lock_irq(&mdev->tconn->req_lock);
        }
 }
 
 void drbd_wait_ee_list_empty(struct drbd_conf *mdev, struct list_head *head)
 {
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        _drbd_wait_ee_list_empty(mdev, head);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 }
 
 /* see also kernel_accept; which is only present since 2.6.18.
@@ -516,7 +516,7 @@ static int drbd_recv(struct drbd_conf *mdev, void *buf, size_t size)
        set_fs(KERNEL_DS);
 
        for (;;) {
-               rv = sock_recvmsg(mdev->data.socket, &msg, size, msg.msg_flags);
+               rv = sock_recvmsg(mdev->tconn->data.socket, &msg, size, msg.msg_flags);
                if (rv == size)
                        break;
 
@@ -578,7 +578,7 @@ static struct socket *drbd_try_connect(struct drbd_conf *mdev)
        int err;
        int disconnect_on_error = 1;
 
-       if (!get_net_conf(mdev))
+       if (!get_net_conf(mdev->tconn))
                return NULL;
 
        what = "sock_create_kern";
@@ -644,7 +644,7 @@ out:
                if (disconnect_on_error)
                        drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
        }
-       put_net_conf(mdev);
+       put_net_conf(mdev->tconn);
        return sock;
 }
 
@@ -654,7 +654,7 @@ static struct socket *drbd_wait_for_connect(struct drbd_conf *mdev)
        struct socket *s_estab = NULL, *s_listen;
        const char *what;
 
-       if (!get_net_conf(mdev))
+       if (!get_net_conf(mdev->tconn))
                return NULL;
 
        what = "sock_create_kern";
@@ -692,7 +692,7 @@ out:
                        drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
                }
        }
-       put_net_conf(mdev);
+       put_net_conf(mdev->tconn);
 
        return s_estab;
 }
@@ -700,14 +700,14 @@ out:
 static int drbd_send_fp(struct drbd_conf *mdev,
        struct socket *sock, enum drbd_packets cmd)
 {
-       struct p_header80 *h = &mdev->data.sbuf.header.h80;
+       struct p_header80 *h = &mdev->tconn->data.sbuf.header.h80;
 
        return _drbd_send_cmd(mdev, sock, cmd, h, sizeof(*h), 0);
 }
 
 static enum drbd_packets drbd_recv_fp(struct drbd_conf *mdev, struct socket *sock)
 {
-       struct p_header80 *h = &mdev->data.rbuf.header.h80;
+       struct p_header80 *h = &mdev->tconn->data.rbuf.header.h80;
        int rr;
 
        rr = drbd_recv_short(mdev, sock, h, sizeof(*h), 0);
@@ -755,7 +755,7 @@ static int drbd_connect(struct drbd_conf *mdev)
        struct socket *s, *sock, *msock;
        int try, h, ok;
 
-       D_ASSERT(!mdev->data.socket);
+       D_ASSERT(!mdev->tconn->data.socket);
 
        if (drbd_request_state(mdev, NS(conn, C_WF_CONNECTION)) < SS_SUCCESS)
                return -2;
@@ -833,7 +833,7 @@ retry:
                if (signal_pending(current)) {
                        flush_signals(current);
                        smp_rmb();
-                       if (get_t_state(&mdev->receiver) == EXITING)
+                       if (get_t_state(&mdev->tconn->receiver) == EXITING)
                                goto out_release_sockets;
                }
 
@@ -870,11 +870,11 @@ retry:
        drbd_tcp_nodelay(sock);
        drbd_tcp_nodelay(msock);
 
-       mdev->data.socket = sock;
-       mdev->meta.socket = msock;
-       mdev->last_received = jiffies;
+       mdev->tconn->data.socket = sock;
+       mdev->tconn->meta.socket = msock;
+       mdev->tconn->last_received = jiffies;
 
-       D_ASSERT(mdev->asender.task == NULL);
+       D_ASSERT(mdev->tconn->asender.task == NULL);
 
        h = drbd_do_handshake(mdev);
        if (h <= 0)
@@ -901,7 +901,7 @@ retry:
        atomic_set(&mdev->packet_seq, 0);
        mdev->peer_seq = 0;
 
-       drbd_thread_start(&mdev->asender);
+       drbd_thread_start(&mdev->tconn->asender);
 
        if (drbd_send_protocol(mdev) == -1)
                return -1;
@@ -925,7 +925,7 @@ out_release_sockets:
 
 static int drbd_recv_header(struct drbd_conf *mdev, enum drbd_packets *cmd, unsigned int *packet_size)
 {
-       union p_header *h = &mdev->data.rbuf.header;
+       union p_header *h = &mdev->tconn->data.rbuf.header;
        int r;
 
        r = drbd_recv(mdev, h, sizeof(*h));
@@ -948,7 +948,7 @@ static int drbd_recv_header(struct drbd_conf *mdev, enum drbd_packets *cmd, unsi
                    be16_to_cpu(h->h80.length));
                return false;
        }
-       mdev->last_received = jiffies;
+       mdev->tconn->last_received = jiffies;
 
        return true;
 }
@@ -1163,7 +1163,7 @@ fail:
 static int receive_Barrier(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
 {
        int rv;
-       struct p_barrier *p = &mdev->data.rbuf.barrier;
+       struct p_barrier *p = &mdev->tconn->data.rbuf.barrier;
        struct drbd_epoch *epoch;
 
        inc_unacked(mdev);
@@ -1244,7 +1244,7 @@ read_in_block(struct drbd_conf *mdev, u64 id, sector_t sector, int data_size) __
        void *dig_vv = mdev->int_dig_vv;
        unsigned long *data;
 
-       dgs = (mdev->agreed_pro_version >= 87 && mdev->integrity_r_tfm) ?
+       dgs = (mdev->tconn->agreed_pro_version >= 87 && mdev->integrity_r_tfm) ?
                crypto_hash_digestsize(mdev->integrity_r_tfm) : 0;
 
        if (dgs) {
@@ -1361,7 +1361,7 @@ static int recv_dless_read(struct drbd_conf *mdev, struct drbd_request *req,
        void *dig_in = mdev->int_dig_in;
        void *dig_vv = mdev->int_dig_vv;
 
-       dgs = (mdev->agreed_pro_version >= 87 && mdev->integrity_r_tfm) ?
+       dgs = (mdev->tconn->agreed_pro_version >= 87 && mdev->integrity_r_tfm) ?
                crypto_hash_digestsize(mdev->integrity_r_tfm) : 0;
 
        if (dgs) {
@@ -1452,9 +1452,9 @@ static int recv_resync_read(struct drbd_conf *mdev, sector_t sector, int data_si
 
        e->w.cb = e_end_resync_block;
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        list_add(&e->w.list, &mdev->sync_ee);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        atomic_add(data_size >> 9, &mdev->rs_sect_ev);
        if (drbd_submit_ee(mdev, e, WRITE, DRBD_FAULT_RS_WR) == 0)
@@ -1462,9 +1462,9 @@ static int recv_resync_read(struct drbd_conf *mdev, sector_t sector, int data_si
 
        /* don't care for the reason here */
        dev_err(DEV, "submit failed, triggering re-connect\n");
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        list_del(&e->w.list);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        drbd_free_ee(mdev, e);
 fail:
@@ -1494,13 +1494,13 @@ static int receive_DataReply(struct drbd_conf *mdev, enum drbd_packets cmd, unsi
        struct drbd_request *req;
        sector_t sector;
        int ok;
-       struct p_data *p = &mdev->data.rbuf.data;
+       struct p_data *p = &mdev->tconn->data.rbuf.data;
 
        sector = be64_to_cpu(p->sector);
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        req = find_request(mdev, &mdev->read_requests, p->block_id, sector, false, __func__);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
        if (unlikely(!req))
                return false;
 
@@ -1522,7 +1522,7 @@ static int receive_RSDataReply(struct drbd_conf *mdev, enum drbd_packets cmd, un
 {
        sector_t sector;
        int ok;
-       struct p_data *p = &mdev->data.rbuf.data;
+       struct p_data *p = &mdev->tconn->data.rbuf.data;
 
        sector = be64_to_cpu(p->sector);
        D_ASSERT(p->block_id == ID_SYNCER);
@@ -1574,11 +1574,11 @@ static int e_end_block(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
        /* we delete from the conflict detection hash _after_ we sent out the
         * P_WRITE_ACK / P_NEG_ACK, to get the sequence number right.  */
        if (mdev->tconn->net_conf->two_primaries) {
-               spin_lock_irq(&mdev->req_lock);
+               spin_lock_irq(&mdev->tconn->req_lock);
                D_ASSERT(!drbd_interval_empty(&e->i));
                drbd_remove_interval(&mdev->epoch_entries, &e->i);
                drbd_clear_interval(&e->i);
-               spin_unlock_irq(&mdev->req_lock);
+               spin_unlock_irq(&mdev->tconn->req_lock);
        } else
                D_ASSERT(drbd_interval_empty(&e->i));
 
@@ -1595,11 +1595,11 @@ static int e_send_discard_ack(struct drbd_conf *mdev, struct drbd_work *w, int u
        D_ASSERT(mdev->tconn->net_conf->wire_protocol == DRBD_PROT_C);
        ok = drbd_send_ack(mdev, P_DISCARD_ACK, e);
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        D_ASSERT(!drbd_interval_empty(&e->i));
        drbd_remove_interval(&mdev->epoch_entries, &e->i);
        drbd_clear_interval(&e->i);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        dec_unacked(mdev);
 
@@ -1675,7 +1675,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
 {
        sector_t sector;
        struct drbd_epoch_entry *e;
-       struct p_data *p = &mdev->data.rbuf.data;
+       struct p_data *p = &mdev->tconn->data.rbuf.data;
        int rw = WRITE;
        u32 dp_flags;
 
@@ -1718,7 +1718,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
 
        /* I'm the receiver, I do hold a net_cnt reference. */
        if (!mdev->tconn->net_conf->two_primaries) {
-               spin_lock_irq(&mdev->req_lock);
+               spin_lock_irq(&mdev->tconn->req_lock);
        } else {
                /* don't get the req_lock yet,
                 * we may sleep in drbd_wait_peer_seq */
@@ -1765,7 +1765,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
                if (drbd_wait_peer_seq(mdev, be32_to_cpu(p->seq_num)))
                        goto out_interrupted;
 
-               spin_lock_irq(&mdev->req_lock);
+               spin_lock_irq(&mdev->tconn->req_lock);
 
                drbd_insert_interval(&mdev->epoch_entries, &e->i);
 
@@ -1805,7 +1805,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
                                e->w.cb = e_send_discard_ack;
                                list_add_tail(&e->w.list, &mdev->done_ee);
 
-                               spin_unlock_irq(&mdev->req_lock);
+                               spin_unlock_irq(&mdev->tconn->req_lock);
 
                                /* we could probably send that P_DISCARD_ACK ourselves,
                                 * but I don't like the receiver using the msock */
@@ -1820,13 +1820,13 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
                                drbd_remove_interval(&mdev->epoch_entries, &e->i);
                                drbd_clear_interval(&e->i);
 
-                               spin_unlock_irq(&mdev->req_lock);
+                               spin_unlock_irq(&mdev->tconn->req_lock);
 
                                finish_wait(&mdev->misc_wait, &wait);
                                goto out_interrupted;
                        }
 
-                       spin_unlock_irq(&mdev->req_lock);
+                       spin_unlock_irq(&mdev->tconn->req_lock);
                        if (first) {
                                first = 0;
                                dev_alert(DEV, "Concurrent write! [W AFTERWARDS] "
@@ -1837,13 +1837,13 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
                                D_ASSERT(have_unacked == 0);
                        }
                        schedule();
-                       spin_lock_irq(&mdev->req_lock);
+                       spin_lock_irq(&mdev->tconn->req_lock);
                }
                finish_wait(&mdev->misc_wait, &wait);
        }
 
        list_add(&e->w.list, &mdev->active_ee);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        switch (mdev->tconn->net_conf->wire_protocol) {
        case DRBD_PROT_C:
@@ -1874,11 +1874,11 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
 
        /* don't care for the reason here */
        dev_err(DEV, "submit failed, triggering re-connect\n");
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        list_del(&e->w.list);
        drbd_remove_interval(&mdev->epoch_entries, &e->i);
        drbd_clear_interval(&e->i);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
        if (e->flags & EE_CALL_AL_COMPLETE_IO)
                drbd_al_complete_io(mdev, e->i.sector);
 
@@ -1964,7 +1964,7 @@ static int receive_DataRequest(struct drbd_conf *mdev, enum drbd_packets cmd, un
        struct digest_info *di = NULL;
        int size, verb;
        unsigned int fault_type;
-       struct p_block_req *p = &mdev->data.rbuf.block_req;
+       struct p_block_req *p = &mdev->tconn->data.rbuf.block_req;
 
        sector = be64_to_cpu(p->sector);
        size   = be32_to_cpu(p->blksize);
@@ -2048,7 +2048,7 @@ static int receive_DataRequest(struct drbd_conf *mdev, enum drbd_packets cmd, un
                        goto out_free_e;
 
                if (cmd == P_CSUM_RS_REQUEST) {
-                       D_ASSERT(mdev->agreed_pro_version >= 89);
+                       D_ASSERT(mdev->tconn->agreed_pro_version >= 89);
                        e->w.cb = w_e_end_csum_rs_req;
                        /* used in the sector offset progress display */
                        mdev->bm_resync_fo = BM_SECT_TO_BIT(sector);
@@ -2065,7 +2065,7 @@ static int receive_DataRequest(struct drbd_conf *mdev, enum drbd_packets cmd, un
 
        case P_OV_REQUEST:
                if (mdev->ov_start_sector == ~(sector_t)0 &&
-                   mdev->agreed_pro_version >= 90) {
+                   mdev->tconn->agreed_pro_version >= 90) {
                        unsigned long now = jiffies;
                        int i;
                        mdev->ov_start_sector = sector;
@@ -2122,18 +2122,18 @@ submit_for_resync:
 
 submit:
        inc_unacked(mdev);
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        list_add_tail(&e->w.list, &mdev->read_ee);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        if (drbd_submit_ee(mdev, e, READ, fault_type) == 0)
                return true;
 
        /* don't care for the reason here */
        dev_err(DEV, "submit failed, triggering re-connect\n");
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        list_del(&e->w.list);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
        /* no drbd_rs_complete_io(), we are dropping the connection anyways */
 
 out_free_e:
@@ -2360,7 +2360,7 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
 
                if (mdev->p_uuid[UI_BITMAP] == (u64)0 && mdev->ldev->md.uuid[UI_BITMAP] != (u64)0) {
 
-                       if (mdev->agreed_pro_version < 91)
+                       if (mdev->tconn->agreed_pro_version < 91)
                                return -1091;
 
                        if ((mdev->ldev->md.uuid[UI_BITMAP] & ~((u64)1)) == (mdev->p_uuid[UI_HISTORY_START] & ~((u64)1)) &&
@@ -2381,7 +2381,7 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
 
                if (mdev->ldev->md.uuid[UI_BITMAP] == (u64)0 && mdev->p_uuid[UI_BITMAP] != (u64)0) {
 
-                       if (mdev->agreed_pro_version < 91)
+                       if (mdev->tconn->agreed_pro_version < 91)
                                return -1091;
 
                        if ((mdev->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) == (mdev->p_uuid[UI_BITMAP] & ~((u64)1)) &&
@@ -2427,14 +2427,14 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
        *rule_nr = 51;
        peer = mdev->p_uuid[UI_HISTORY_START] & ~((u64)1);
        if (self == peer) {
-               if (mdev->agreed_pro_version < 96 ?
+               if (mdev->tconn->agreed_pro_version < 96 ?
                    (mdev->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) ==
                    (mdev->p_uuid[UI_HISTORY_START + 1] & ~((u64)1)) :
                    peer + UUID_NEW_BM_OFFSET == (mdev->p_uuid[UI_BITMAP] & ~((u64)1))) {
                        /* The last P_SYNC_UUID did not get though. Undo the last start of
                           resync as sync source modifications of the peer's UUIDs. */
 
-                       if (mdev->agreed_pro_version < 91)
+                       if (mdev->tconn->agreed_pro_version < 91)
                                return -1091;
 
                        mdev->p_uuid[UI_BITMAP] = mdev->p_uuid[UI_HISTORY_START];
@@ -2464,14 +2464,14 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
        *rule_nr = 71;
        self = mdev->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1);
        if (self == peer) {
-               if (mdev->agreed_pro_version < 96 ?
+               if (mdev->tconn->agreed_pro_version < 96 ?
                    (mdev->ldev->md.uuid[UI_HISTORY_START + 1] & ~((u64)1)) ==
                    (mdev->p_uuid[UI_HISTORY_START] & ~((u64)1)) :
                    self + UUID_NEW_BM_OFFSET == (mdev->ldev->md.uuid[UI_BITMAP] & ~((u64)1))) {
                        /* The last P_SYNC_UUID did not get though. Undo the last start of
                           resync as sync source modifications of our UUIDs. */
 
-                       if (mdev->agreed_pro_version < 91)
+                       if (mdev->tconn->agreed_pro_version < 91)
                                return -1091;
 
                        _drbd_uuid_set(mdev, UI_BITMAP, mdev->ldev->md.uuid[UI_HISTORY_START]);
@@ -2683,7 +2683,7 @@ static int cmp_after_sb(enum drbd_after_sb_p peer, enum drbd_after_sb_p self)
 
 static int receive_protocol(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
 {
-       struct p_protocol *p = &mdev->data.rbuf.protocol;
+       struct p_protocol *p = &mdev->tconn->data.rbuf.protocol;
        int p_proto, p_after_sb_0p, p_after_sb_1p, p_after_sb_2p;
        int p_want_lose, p_two_primaries, cf;
        char p_integrity_alg[SHARED_SECRET_MAX] = "";
@@ -2731,7 +2731,7 @@ static int receive_protocol(struct drbd_conf *mdev, enum drbd_packets cmd, unsig
                goto disconnect;
        }
 
-       if (mdev->agreed_pro_version >= 87) {
+       if (mdev->tconn->agreed_pro_version >= 87) {
                unsigned char *my_alg = mdev->tconn->net_conf->integrity_alg;
 
                if (drbd_recv(mdev, p_integrity_alg, data_size) != data_size)
@@ -2783,11 +2783,11 @@ struct crypto_hash *drbd_crypto_alloc_digest_safe(const struct drbd_conf *mdev,
 static int receive_SyncParam(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int packet_size)
 {
        int ok = true;
-       struct p_rs_param_95 *p = &mdev->data.rbuf.rs_param_95;
+       struct p_rs_param_95 *p = &mdev->tconn->data.rbuf.rs_param_95;
        unsigned int header_size, data_size, exp_max_sz;
        struct crypto_hash *verify_tfm = NULL;
        struct crypto_hash *csums_tfm = NULL;
-       const int apv = mdev->agreed_pro_version;
+       const int apv = mdev->tconn->agreed_pro_version;
        int *rs_plan_s = NULL;
        int fifo_size = 0;
 
@@ -2946,7 +2946,7 @@ static void warn_if_differ_considerably(struct drbd_conf *mdev,
 
 static int receive_sizes(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
 {
-       struct p_sizes *p = &mdev->data.rbuf.sizes;
+       struct p_sizes *p = &mdev->tconn->data.rbuf.sizes;
        enum determine_dev_size dd = unchanged;
        sector_t p_size, p_usize, my_usize;
        int ldsc = 0; /* local disk size changed */
@@ -3049,7 +3049,7 @@ static int receive_sizes(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
 
 static int receive_uuids(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
 {
-       struct p_uuids *p = &mdev->data.rbuf.uuids;
+       struct p_uuids *p = &mdev->tconn->data.rbuf.uuids;
        u64 *p_uuid;
        int i, updated_uuids = 0;
 
@@ -3074,7 +3074,7 @@ static int receive_uuids(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
        if (get_ldev(mdev)) {
                int skip_initial_sync =
                        mdev->state.conn == C_CONNECTED &&
-                       mdev->agreed_pro_version >= 90 &&
+                       mdev->tconn->agreed_pro_version >= 90 &&
                        mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED &&
                        (p_uuid[UI_FLAGS] & 8);
                if (skip_initial_sync) {
@@ -3143,7 +3143,7 @@ static union drbd_state convert_state(union drbd_state ps)
 
 static int receive_req_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
 {
-       struct p_req_state *p = &mdev->data.rbuf.req_state;
+       struct p_req_state *p = &mdev->tconn->data.rbuf.req_state;
        union drbd_state mask, val;
        enum drbd_state_rv rv;
 
@@ -3169,7 +3169,7 @@ static int receive_req_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsi
 
 static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
 {
-       struct p_state *p = &mdev->data.rbuf.state;
+       struct p_state *p = &mdev->tconn->data.rbuf.state;
        union drbd_state os, ns, peer_state;
        enum drbd_disk_state real_peer_disk;
        enum chg_state_flags cs_flags;
@@ -3183,10 +3183,10 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
                dev_info(DEV, "real peer disk state = %s\n", drbd_disk_str(real_peer_disk));
        }
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
  retry:
        os = ns = mdev->state;
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        /* peer says his disk is uptodate, while we think it is inconsistent,
         * and this happens while we think we have a sync going on. */
@@ -3270,7 +3270,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
                }
        }
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        if (mdev->state.i != os.i)
                goto retry;
        clear_bit(CONSIDER_RESYNC, &mdev->flags);
@@ -3284,7 +3284,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
            test_bit(NEW_CUR_UUID, &mdev->flags)) {
                /* Do not allow tl_restart(RESEND) for a rebooted peer. We can only allow this
                   for temporal network outages! */
-               spin_unlock_irq(&mdev->req_lock);
+               spin_unlock_irq(&mdev->tconn->req_lock);
                dev_err(DEV, "Aborting Connect, can not thaw IO with an only Consistent peer\n");
                tl_clear(mdev);
                drbd_uuid_new_current(mdev);
@@ -3294,7 +3294,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
        }
        rv = _drbd_set_state(mdev, ns, cs_flags, NULL);
        ns = mdev->state;
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        if (rv < SS_SUCCESS) {
                drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
@@ -3321,7 +3321,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
 
 static int receive_sync_uuid(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
 {
-       struct p_rs_uuid *p = &mdev->data.rbuf.rs_uuid;
+       struct p_rs_uuid *p = &mdev->tconn->data.rbuf.rs_uuid;
 
        wait_event(mdev->misc_wait,
                   mdev->state.conn == C_WF_SYNC_UUID ||
@@ -3520,7 +3520,7 @@ static int receive_bitmap(struct drbd_conf *mdev, enum drbd_packets cmd, unsigne
        void *buffer;
        int err;
        int ok = false;
-       struct p_header80 *h = &mdev->data.rbuf.header.h80;
+       struct p_header80 *h = &mdev->tconn->data.rbuf.header.h80;
 
        drbd_bm_lock(mdev, "receive bitmap", BM_LOCKED_SET_ALLOWED);
        /* you are supposed to send additional out-of-sync information
@@ -3629,14 +3629,14 @@ static int receive_UnplugRemote(struct drbd_conf *mdev, enum drbd_packets cmd, u
 {
        /* Make sure we've acked all the TCP data associated
         * with the data requests being unplugged */
-       drbd_tcp_quickack(mdev->data.socket);
+       drbd_tcp_quickack(mdev->tconn->data.socket);
 
        return true;
 }
 
 static int receive_out_of_sync(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
 {
-       struct p_block_desc *p = &mdev->data.rbuf.block_desc;
+       struct p_block_desc *p = &mdev->tconn->data.rbuf.block_desc;
 
        switch (mdev->state.conn) {
        case C_WF_SYNC_UUID:
@@ -3690,21 +3690,21 @@ static struct data_cmd drbd_cmd_handler[] = {
 };
 
 /* All handler functions that expect a sub-header get that sub-heder in
-   mdev->data.rbuf.header.head.payload.
+   mdev->tconn->data.rbuf.header.head.payload.
 
-   Usually in mdev->data.rbuf.header.head the callback can find the usual
+   Usually in mdev->tconn->data.rbuf.header.head the callback can find the usual
    p_header, but they may not rely on that. Since there is also p_header95 !
  */
 
 static void drbdd(struct drbd_conf *mdev)
 {
-       union p_header *header = &mdev->data.rbuf.header;
+       union p_header *header = &mdev->tconn->data.rbuf.header;
        unsigned int packet_size;
        enum drbd_packets cmd;
        size_t shs; /* sub header size */
        int rv;
 
-       while (get_t_state(&mdev->receiver) == RUNNING) {
+       while (get_t_state(&mdev->tconn->receiver) == RUNNING) {
                drbd_thread_current_set_cpu(mdev);
                if (!drbd_recv_header(mdev, &cmd, &packet_size))
                        goto err_out;
@@ -3753,7 +3753,7 @@ void drbd_flush_workqueue(struct drbd_conf *mdev)
 
        barr.w.cb = w_prev_work_done;
        init_completion(&barr.done);
-       drbd_queue_work(&mdev->data.work, &barr.w);
+       drbd_queue_work(&mdev->tconn->data.work, &barr.w);
        wait_for_completion(&barr.done);
 }
 
@@ -3768,15 +3768,15 @@ static void drbd_disconnect(struct drbd_conf *mdev)
                return;
 
        /* asender does not clean up anything. it must not interfere, either */
-       drbd_thread_stop(&mdev->asender);
+       drbd_thread_stop(&mdev->tconn->asender);
        drbd_free_sock(mdev);
 
        /* wait for current activity to cease. */
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        _drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
        _drbd_wait_ee_list_empty(mdev, &mdev->sync_ee);
        _drbd_wait_ee_list_empty(mdev, &mdev->read_ee);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        /* We do not have data structures that would allow us to
         * get the rs_pending_cnt down to 0 again.
@@ -3828,7 +3828,7 @@ static void drbd_disconnect(struct drbd_conf *mdev)
        if (mdev->state.role == R_PRIMARY && fp >= FP_RESOURCE && mdev->state.pdsk >= D_UNKNOWN)
                drbd_try_outdate_peer_async(mdev);
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        os = mdev->state;
        if (os.conn >= C_UNCONNECTED) {
                /* Do not restart in case we are C_DISCONNECTING */
@@ -3836,10 +3836,10 @@ static void drbd_disconnect(struct drbd_conf *mdev)
                ns.conn = C_UNCONNECTED;
                rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
        }
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        if (os.conn == C_DISCONNECTING) {
-               wait_event(mdev->net_cnt_wait, atomic_read(&mdev->net_cnt) == 0);
+               wait_event(mdev->tconn->net_cnt_wait, atomic_read(&mdev->tconn->net_cnt) == 0);
 
                crypto_free_hash(mdev->cram_hmac_tfm);
                mdev->cram_hmac_tfm = NULL;
@@ -3891,26 +3891,26 @@ static void drbd_disconnect(struct drbd_conf *mdev)
  */
 static int drbd_send_handshake(struct drbd_conf *mdev)
 {
-       /* ASSERT current == mdev->receiver ... */
-       struct p_handshake *p = &mdev->data.sbuf.handshake;
+       /* ASSERT current == mdev->tconn->receiver ... */
+       struct p_handshake *p = &mdev->tconn->data.sbuf.handshake;
        int ok;
 
-       if (mutex_lock_interruptible(&mdev->data.mutex)) {
+       if (mutex_lock_interruptible(&mdev->tconn->data.mutex)) {
                dev_err(DEV, "interrupted during initial handshake\n");
                return 0; /* interrupted. not ok. */
        }
 
-       if (mdev->data.socket == NULL) {
-               mutex_unlock(&mdev->data.mutex);
+       if (mdev->tconn->data.socket == NULL) {
+               mutex_unlock(&mdev->tconn->data.mutex);
                return 0;
        }
 
        memset(p, 0, sizeof(*p));
        p->protocol_min = cpu_to_be32(PRO_VERSION_MIN);
        p->protocol_max = cpu_to_be32(PRO_VERSION_MAX);
-       ok = _drbd_send_cmd( mdev, mdev->data.socket, P_HAND_SHAKE,
+       ok = _drbd_send_cmd( mdev, mdev->tconn->data.socket, P_HAND_SHAKE,
                             (struct p_header80 *)p, sizeof(*p), 0 );
-       mutex_unlock(&mdev->data.mutex);
+       mutex_unlock(&mdev->tconn->data.mutex);
        return ok;
 }
 
@@ -3923,8 +3923,8 @@ static int drbd_send_handshake(struct drbd_conf *mdev)
  */
 static int drbd_do_handshake(struct drbd_conf *mdev)
 {
-       /* ASSERT current == mdev->receiver ... */
-       struct p_handshake *p = &mdev->data.rbuf.handshake;
+       /* ASSERT current == mdev->tconn->receiver ... */
+       struct p_handshake *p = &mdev->tconn->data.rbuf.handshake;
        const int expect = sizeof(struct p_handshake) - sizeof(struct p_header80);
        unsigned int length;
        enum drbd_packets cmd;
@@ -3967,10 +3967,10 @@ static int drbd_do_handshake(struct drbd_conf *mdev)
            PRO_VERSION_MIN > p->protocol_max)
                goto incompat;
 
-       mdev->agreed_pro_version = min_t(int, PRO_VERSION_MAX, p->protocol_max);
+       mdev->tconn->agreed_pro_version = min_t(int, PRO_VERSION_MAX, p->protocol_max);
 
        dev_info(DEV, "Handshake successful: "
-            "Agreed network protocol version %d\n", mdev->agreed_pro_version);
+            "Agreed network protocol version %d\n", mdev->tconn->agreed_pro_version);
 
        return 1;
 
@@ -4166,9 +4166,9 @@ int drbdd_init(struct drbd_thread *thi)
        } while (h == 0);
 
        if (h > 0) {
-               if (get_net_conf(mdev)) {
+               if (get_net_conf(mdev->tconn)) {
                        drbdd(mdev);
-                       put_net_conf(mdev);
+                       put_net_conf(mdev->tconn);
                }
        }
 
@@ -4207,7 +4207,7 @@ static int got_Ping(struct drbd_conf *mdev, struct p_header80 *h)
 static int got_PingAck(struct drbd_conf *mdev, struct p_header80 *h)
 {
        /* restore idle timeout */
-       mdev->meta.socket->sk->sk_rcvtimeo = mdev->tconn->net_conf->ping_int*HZ;
+       mdev->tconn->meta.socket->sk->sk_rcvtimeo = mdev->tconn->net_conf->ping_int*HZ;
        if (!test_and_set_bit(GOT_PING_ACK, &mdev->flags))
                wake_up(&mdev->misc_wait);
 
@@ -4220,7 +4220,7 @@ static int got_IsInSync(struct drbd_conf *mdev, struct p_header80 *h)
        sector_t sector = be64_to_cpu(p->sector);
        int blksize = be32_to_cpu(p->blksize);
 
-       D_ASSERT(mdev->agreed_pro_version >= 89);
+       D_ASSERT(mdev->tconn->agreed_pro_version >= 89);
 
        update_peer_seq(mdev, be32_to_cpu(p->seq_num));
 
@@ -4245,14 +4245,14 @@ validate_req_change_req_state(struct drbd_conf *mdev, u64 id, sector_t sector,
        struct drbd_request *req;
        struct bio_and_error m;
 
-       spin_lock_irq(&mdev->req_lock);
+       spin_lock_irq(&mdev->tconn->req_lock);
        req = find_request(mdev, root, id, sector, missing_ok, func);
        if (unlikely(!req)) {
-               spin_unlock_irq(&mdev->req_lock);
+               spin_unlock_irq(&mdev->tconn->req_lock);
                return false;
        }
        __req_mod(req, what, &m);
-       spin_unlock_irq(&mdev->req_lock);
+       spin_unlock_irq(&mdev->tconn->req_lock);
 
        if (m.bio)
                complete_master_bio(mdev, &m);
@@ -4427,7 +4427,7 @@ static int got_OVResult(struct drbd_conf *mdev, struct p_header80 *h)
                w = kmalloc(sizeof(*w), GFP_NOIO);
                if (w) {
                        w->cb = w_ov_finished;
-                       drbd_queue_work_front(&mdev->data.work, w);
+                       drbd_queue_work_front(&mdev->tconn->data.work, w);
                } else {
                        dev_err(DEV, "kmalloc(w) failed.");
                        ov_oos_print(mdev);
@@ -4479,7 +4479,7 @@ static struct asender_cmd *get_asender_cmd(int cmd)
 int drbd_asender(struct drbd_thread *thi)
 {
        struct drbd_conf *mdev = thi->mdev;
-       struct p_header80 *h = &mdev->meta.rbuf.header.h80;
+       struct p_header80 *h = &mdev->tconn->meta.rbuf.header.h80;
        struct asender_cmd *cmd = NULL;
 
        int rv, len;
@@ -4501,7 +4501,7 @@ int drbd_asender(struct drbd_thread *thi)
                                dev_err(DEV, "drbd_send_ping has failed\n");
                                goto reconnect;
                        }
-                       mdev->meta.socket->sk->sk_rcvtimeo =
+                       mdev->tconn->meta.socket->sk->sk_rcvtimeo =
                                mdev->tconn->net_conf->ping_timeo*HZ/10;
                        ping_timeout_active = 1;
                }
@@ -4510,7 +4510,7 @@ int drbd_asender(struct drbd_thread *thi)
                 * it may hurt latency if we cork without much to send */
                if (!mdev->tconn->net_conf->no_cork &&
                        3 < atomic_read(&mdev->unacked_cnt))
-                       drbd_tcp_cork(mdev->meta.socket);
+                       drbd_tcp_cork(mdev->tconn->meta.socket);
                while (1) {
                        clear_bit(SIGNAL_ASENDER, &mdev->flags);
                        flush_signals(current);
@@ -4518,9 +4518,9 @@ int drbd_asender(struct drbd_thread *thi)
                                goto reconnect;
                        /* to avoid race with newly queued ACKs */
                        set_bit(SIGNAL_ASENDER, &mdev->flags);
-                       spin_lock_irq(&mdev->req_lock);
+                       spin_lock_irq(&mdev->tconn->req_lock);
                        empty = list_empty(&mdev->done_ee);
-                       spin_unlock_irq(&mdev->req_lock);
+                       spin_unlock_irq(&mdev->tconn->req_lock);
                        /* new ack may have been queued right here,
                         * but then there is also a signal pending,
                         * and we start over... */
@@ -4529,13 +4529,13 @@ int drbd_asender(struct drbd_thread *thi)
                }
                /* but unconditionally uncork unless disabled */
                if (!mdev->tconn->net_conf->no_cork)
-                       drbd_tcp_uncork(mdev->meta.socket);
+                       drbd_tcp_uncork(mdev->tconn->meta.socket);
 
                /* short circuit, recv_msg would return EINTR anyways. */
                if (signal_pending(current))
                        continue;
 
-               rv = drbd_recv_short(mdev, mdev->meta.socket,
+               rv = drbd_recv_short(mdev, mdev->tconn->meta.socket,
                                     buf, expect-received, 0);
                clear_bit(SIGNAL_ASENDER, &mdev->flags);
 
@@ -4560,8 +4560,8 @@ int drbd_asender(struct drbd_thread *thi)
                } else if (rv == -EAGAIN) {
                        /* If the data socket received something meanwhile,
                         * that is good enough: peer is still alive. */
-                       if (time_after(mdev->last_received,
-                               jiffies - mdev->meta.socket->sk->sk_rcvtimeo))
+                       if (time_after(mdev->tconn->last_received,
+                               jiffies - mdev->tconn->meta.socket->sk->sk_rcvtimeo))
                                continue;
                        if (ping_timeout_active) {
                                dev_err(DEV, "PingAck did not arrive in time.\n");
@@ -4598,7 +4598,7 @@ int drbd_asender(struct drbd_thread *thi)
                                goto reconnect;
                }
                if (received == expect) {
-                       mdev->last_received = jiffies;
+                       mdev->tconn->last_received = jiffies;
                        D_ASSERT(cmd != NULL);
                        if (!cmd->process(mdev, h))
                                goto reconnect;