enum drbd_packet cmd;
unsigned int size;
unsigned int vnr;
+ void *data;
};
enum finish_epoch {
FE_RECYCLED,
};
-static int drbd_do_handshake(struct drbd_tconn *tconn);
+static int drbd_do_features(struct drbd_tconn *tconn);
static int drbd_do_auth(struct drbd_tconn *tconn);
-static int drbd_disconnected(int vnr, void *p, void *data);
+static int drbd_disconnected(struct drbd_conf *mdev);
-static enum finish_epoch drbd_may_finish_epoch(struct drbd_conf *, struct drbd_epoch *, enum epoch_event);
+static enum finish_epoch drbd_may_finish_epoch(struct drbd_tconn *, struct drbd_epoch *, enum epoch_event);
static int e_end_block(struct drbd_work *, int);
*head = chain_first;
}
-static struct page *drbd_pp_first_pages_or_try_alloc(struct drbd_conf *mdev, int number)
+static struct page *__drbd_alloc_pages(struct drbd_conf *mdev,
+ unsigned int number)
{
struct page *page = NULL;
struct page *tmp = NULL;
- int i = 0;
+ unsigned int i = 0;
/* Yes, testing drbd_pp_vacant outside the lock is racy.
* So what. It saves a spin_lock. */
return page;
/* Not enough pages immediately available this time.
- * No need to jump around here, drbd_pp_alloc will retry this
+ * No need to jump around here, drbd_alloc_pages will retry this
* function "soon". */
if (page) {
tmp = page_chain_tail(page, NULL);
return NULL;
}
-static void reclaim_net_ee(struct drbd_conf *mdev, struct list_head *to_be_freed)
+static void reclaim_finished_net_peer_reqs(struct drbd_conf *mdev,
+ struct list_head *to_be_freed)
{
struct drbd_peer_request *peer_req;
struct list_head *le, *tle;
list_for_each_safe(le, tle, &mdev->net_ee) {
peer_req = list_entry(le, struct drbd_peer_request, w.list);
- if (drbd_ee_has_active_page(peer_req))
+ if (drbd_peer_req_has_active_page(peer_req))
break;
list_move(le, to_be_freed);
}
struct drbd_peer_request *peer_req, *t;
spin_lock_irq(&mdev->tconn->req_lock);
- reclaim_net_ee(mdev, &reclaimed);
+ reclaim_finished_net_peer_reqs(mdev, &reclaimed);
spin_unlock_irq(&mdev->tconn->req_lock);
list_for_each_entry_safe(peer_req, t, &reclaimed, w.list)
- drbd_free_net_ee(mdev, peer_req);
+ drbd_free_net_peer_req(mdev, peer_req);
}
/**
- * drbd_pp_alloc() - Returns @number pages, retries forever (or until signalled)
+ * drbd_alloc_pages() - Returns @number pages, retries forever (or until signalled)
* @mdev: DRBD device.
* @number: number of pages requested
* @retry: whether to retry, if not enough pages are available right now
*
* Returns a page chain linked via page->private.
*/
-static struct page *drbd_pp_alloc(struct drbd_conf *mdev, unsigned number, bool retry)
+struct page *drbd_alloc_pages(struct drbd_conf *mdev, unsigned int number,
+ bool retry)
{
struct page *page = NULL;
+ struct net_conf *nc;
DEFINE_WAIT(wait);
+ int mxb;
/* Yes, we may run up to @number over max_buffers. If we
* follow it strictly, the admin will get it wrong anyways. */
- if (atomic_read(&mdev->pp_in_use) < mdev->tconn->net_conf->max_buffers)
- page = drbd_pp_first_pages_or_try_alloc(mdev, number);
+ rcu_read_lock();
+ nc = rcu_dereference(mdev->tconn->net_conf);
+ mxb = nc ? nc->max_buffers : 1000000;
+ rcu_read_unlock();
+
+ if (atomic_read(&mdev->pp_in_use) < mxb)
+ page = __drbd_alloc_pages(mdev, number);
while (page == NULL) {
prepare_to_wait(&drbd_pp_wait, &wait, TASK_INTERRUPTIBLE);
drbd_kick_lo_and_reclaim_net(mdev);
- if (atomic_read(&mdev->pp_in_use) < mdev->tconn->net_conf->max_buffers) {
- page = drbd_pp_first_pages_or_try_alloc(mdev, number);
+ if (atomic_read(&mdev->pp_in_use) < mxb) {
+ page = __drbd_alloc_pages(mdev, number);
if (page)
break;
}
break;
if (signal_pending(current)) {
- dev_warn(DEV, "drbd_pp_alloc interrupted!\n");
+ dev_warn(DEV, "drbd_alloc_pages interrupted!\n");
break;
}
return page;
}
-/* Must not be used from irq, as that may deadlock: see drbd_pp_alloc.
+/* Must not be used from irq, as that may deadlock: see drbd_alloc_pages.
* 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)
+static void drbd_free_pages(struct drbd_conf *mdev, struct page *page, int is_net)
{
atomic_t *a = is_net ? &mdev->pp_in_use_by_net : &mdev->pp_in_use;
int i;
_drbd_wait_ee_list_empty()
You must not have the req_lock:
- drbd_free_ee()
- drbd_alloc_ee()
- drbd_init_ee()
- drbd_release_ee()
+ drbd_free_peer_req()
+ drbd_alloc_peer_req()
+ drbd_free_peer_reqs()
drbd_ee_fix_bhs()
- drbd_process_done_ee()
+ drbd_finish_peer_reqs()
drbd_clear_done_ee()
drbd_wait_ee_list_empty()
*/
struct drbd_peer_request *
-drbd_alloc_ee(struct drbd_conf *mdev, u64 id, sector_t sector,
- unsigned int data_size, gfp_t gfp_mask) __must_hold(local)
+drbd_alloc_peer_req(struct drbd_conf *mdev, u64 id, sector_t sector,
+ unsigned int data_size, gfp_t gfp_mask) __must_hold(local)
{
struct drbd_peer_request *peer_req;
struct page *page;
peer_req = mempool_alloc(drbd_ee_mempool, gfp_mask & ~__GFP_HIGHMEM);
if (!peer_req) {
if (!(gfp_mask & __GFP_NOWARN))
- dev_err(DEV, "alloc_ee: Allocation of an EE failed\n");
+ dev_err(DEV, "%s: allocation failed\n", __func__);
return NULL;
}
- page = drbd_pp_alloc(mdev, nr_pages, (gfp_mask & __GFP_WAIT));
+ page = drbd_alloc_pages(mdev, nr_pages, (gfp_mask & __GFP_WAIT));
if (!page)
goto fail;
return NULL;
}
-void drbd_free_some_ee(struct drbd_conf *mdev, struct drbd_peer_request *peer_req,
+void __drbd_free_peer_req(struct drbd_conf *mdev, struct drbd_peer_request *peer_req,
int is_net)
{
if (peer_req->flags & EE_HAS_DIGEST)
kfree(peer_req->digest);
- drbd_pp_free(mdev, peer_req->pages, is_net);
+ drbd_free_pages(mdev, peer_req->pages, is_net);
D_ASSERT(atomic_read(&peer_req->pending_bios) == 0);
D_ASSERT(drbd_interval_empty(&peer_req->i));
mempool_free(peer_req, drbd_ee_mempool);
}
-int drbd_release_ee(struct drbd_conf *mdev, struct list_head *list)
+int drbd_free_peer_reqs(struct drbd_conf *mdev, struct list_head *list)
{
LIST_HEAD(work_list);
struct drbd_peer_request *peer_req, *t;
spin_unlock_irq(&mdev->tconn->req_lock);
list_for_each_entry_safe(peer_req, t, &work_list, w.list) {
- drbd_free_some_ee(mdev, peer_req, is_net);
+ __drbd_free_peer_req(mdev, peer_req, is_net);
count++;
}
return count;
}
-
-/* See also comments in _req_mod(,BARRIER_ACKED)
- * and receive_Barrier.
- *
- * Move entries from net_ee to done_ee, if ready.
- * Grab done_ee, call all callbacks, free the entries.
- * The callbacks typically send out ACKs.
+/*
+ * See also comments in _req_mod(,BARRIER_ACKED) and receive_Barrier.
*/
-static int drbd_process_done_ee(struct drbd_conf *mdev)
+static int drbd_finish_peer_reqs(struct drbd_conf *mdev)
{
LIST_HEAD(work_list);
LIST_HEAD(reclaimed);
int err = 0;
spin_lock_irq(&mdev->tconn->req_lock);
- reclaim_net_ee(mdev, &reclaimed);
+ reclaim_finished_net_peer_reqs(mdev, &reclaimed);
list_splice_init(&mdev->done_ee, &work_list);
spin_unlock_irq(&mdev->tconn->req_lock);
list_for_each_entry_safe(peer_req, t, &reclaimed, w.list)
- drbd_free_net_ee(mdev, peer_req);
+ drbd_free_net_peer_req(mdev, peer_req);
/* possible callbacks here:
* e_end_block, and e_end_resync_block, e_send_discard_write.
err2 = peer_req->w.cb(&peer_req->w, !!err);
if (!err)
err = err2;
- drbd_free_ee(mdev, peer_req);
+ drbd_free_peer_req(mdev, peer_req);
}
wake_up(&mdev->ee_wait);
return err;
}
-void _drbd_wait_ee_list_empty(struct drbd_conf *mdev, struct list_head *head)
+static void _drbd_wait_ee_list_empty(struct drbd_conf *mdev,
+ struct list_head *head)
{
DEFINE_WAIT(wait);
}
}
-void drbd_wait_ee_list_empty(struct drbd_conf *mdev, struct list_head *head)
+static void drbd_wait_ee_list_empty(struct drbd_conf *mdev,
+ struct list_head *head)
{
spin_lock_irq(&mdev->tconn->req_lock);
_drbd_wait_ee_list_empty(mdev, head);
goto out;
}
(*newsock)->ops = sock->ops;
+ __module_get((*newsock)->ops->owner);
out:
return err;
const char *what;
struct socket *sock;
struct sockaddr_in6 src_in6;
- int err;
+ struct sockaddr_in6 peer_in6;
+ struct net_conf *nc;
+ int err, peer_addr_len, my_addr_len;
+ int sndbuf_size, rcvbuf_size, connect_int;
int disconnect_on_error = 1;
- if (!get_net_conf(tconn))
+ rcu_read_lock();
+ nc = rcu_dereference(tconn->net_conf);
+ if (!nc) {
+ rcu_read_unlock();
return NULL;
+ }
+ sndbuf_size = nc->sndbuf_size;
+ rcvbuf_size = nc->rcvbuf_size;
+ connect_int = nc->connect_int;
+ rcu_read_unlock();
+
+ my_addr_len = min_t(int, tconn->my_addr_len, sizeof(src_in6));
+ memcpy(&src_in6, &tconn->my_addr, my_addr_len);
+
+ if (((struct sockaddr *)&tconn->my_addr)->sa_family == AF_INET6)
+ src_in6.sin6_port = 0;
+ else
+ ((struct sockaddr_in *)&src_in6)->sin_port = 0; /* AF_INET & AF_SCI */
+
+ peer_addr_len = min_t(int, tconn->peer_addr_len, sizeof(src_in6));
+ memcpy(&peer_in6, &tconn->peer_addr, peer_addr_len);
what = "sock_create_kern";
- err = sock_create_kern(((struct sockaddr *)tconn->net_conf->my_addr)->sa_family,
- SOCK_STREAM, IPPROTO_TCP, &sock);
+ err = sock_create_kern(((struct sockaddr *)&src_in6)->sa_family,
+ SOCK_STREAM, IPPROTO_TCP, &sock);
if (err < 0) {
sock = NULL;
goto out;
}
sock->sk->sk_rcvtimeo =
- sock->sk->sk_sndtimeo = tconn->net_conf->try_connect_int*HZ;
- drbd_setbufsize(sock, tconn->net_conf->sndbuf_size,
- tconn->net_conf->rcvbuf_size);
+ sock->sk->sk_sndtimeo = connect_int * HZ;
+ drbd_setbufsize(sock, sndbuf_size, rcvbuf_size);
/* explicitly bind to the configured IP as source IP
* for the outgoing connections.
* Make sure to use 0 as port number, so linux selects
* a free one dynamically.
*/
- memcpy(&src_in6, tconn->net_conf->my_addr,
- min_t(int, tconn->net_conf->my_addr_len, sizeof(src_in6)));
- if (((struct sockaddr *)tconn->net_conf->my_addr)->sa_family == AF_INET6)
- src_in6.sin6_port = 0;
- else
- ((struct sockaddr_in *)&src_in6)->sin_port = 0; /* AF_INET & AF_SCI */
-
what = "bind before connect";
- err = sock->ops->bind(sock,
- (struct sockaddr *) &src_in6,
- tconn->net_conf->my_addr_len);
+ err = sock->ops->bind(sock, (struct sockaddr *) &src_in6, my_addr_len);
if (err < 0)
goto out;
* stay C_WF_CONNECTION, don't go Disconnecting! */
disconnect_on_error = 0;
what = "connect";
- err = sock->ops->connect(sock,
- (struct sockaddr *)tconn->net_conf->peer_addr,
- tconn->net_conf->peer_addr_len, 0);
+ err = sock->ops->connect(sock, (struct sockaddr *) &peer_in6, peer_addr_len, 0);
out:
if (err < 0) {
if (disconnect_on_error)
conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
}
- put_net_conf(tconn);
+
return sock;
}
static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn)
{
- int timeo, err;
+ int timeo, err, my_addr_len;
+ int sndbuf_size, rcvbuf_size, connect_int;
struct socket *s_estab = NULL, *s_listen;
+ struct sockaddr_in6 my_addr;
+ struct net_conf *nc;
const char *what;
- if (!get_net_conf(tconn))
+ rcu_read_lock();
+ nc = rcu_dereference(tconn->net_conf);
+ if (!nc) {
+ rcu_read_unlock();
return NULL;
+ }
+ sndbuf_size = nc->sndbuf_size;
+ rcvbuf_size = nc->rcvbuf_size;
+ connect_int = nc->connect_int;
+ rcu_read_unlock();
+
+ my_addr_len = min_t(int, tconn->my_addr_len, sizeof(struct sockaddr_in6));
+ memcpy(&my_addr, &tconn->my_addr, my_addr_len);
what = "sock_create_kern";
- err = sock_create_kern(((struct sockaddr *)tconn->net_conf->my_addr)->sa_family,
+ err = sock_create_kern(((struct sockaddr *)&my_addr)->sa_family,
SOCK_STREAM, IPPROTO_TCP, &s_listen);
if (err) {
s_listen = NULL;
goto out;
}
- timeo = tconn->net_conf->try_connect_int * HZ;
+ timeo = connect_int * HZ;
timeo += (random32() & 1) ? timeo / 7 : -timeo / 7; /* 28.5% random jitter */
s_listen->sk->sk_reuse = 1; /* SO_REUSEADDR */
s_listen->sk->sk_rcvtimeo = timeo;
s_listen->sk->sk_sndtimeo = timeo;
- drbd_setbufsize(s_listen, tconn->net_conf->sndbuf_size,
- tconn->net_conf->rcvbuf_size);
+ drbd_setbufsize(s_listen, sndbuf_size, rcvbuf_size);
what = "bind before listen";
- err = s_listen->ops->bind(s_listen,
- (struct sockaddr *) tconn->net_conf->my_addr,
- tconn->net_conf->my_addr_len);
+ err = s_listen->ops->bind(s_listen, (struct sockaddr *)&my_addr, my_addr_len);
if (err < 0)
goto out;
conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
}
}
- put_net_conf(tconn);
return s_estab;
}
-static int drbd_send_fp(struct drbd_tconn *tconn, struct drbd_socket *sock, enum drbd_packet cmd)
-{
- struct p_header *h = tconn->data.sbuf;
+static int decode_header(struct drbd_tconn *, void *, struct packet_info *);
- return !_conn_send_cmd(tconn, 0, sock, cmd, h, sizeof(*h), 0);
+static int send_first_packet(struct drbd_tconn *tconn, struct drbd_socket *sock,
+ enum drbd_packet cmd)
+{
+ if (!conn_prepare_command(tconn, sock))
+ return -EIO;
+ return conn_send_command(tconn, sock, cmd, 0, NULL, 0);
}
-static enum drbd_packet drbd_recv_fp(struct drbd_tconn *tconn, struct socket *sock)
+static int receive_first_packet(struct drbd_tconn *tconn, struct socket *sock)
{
- struct p_header80 h;
- int rr;
-
- rr = drbd_recv_short(sock, &h, sizeof(h), 0);
-
- if (rr == sizeof(h) && h.magic == cpu_to_be32(DRBD_MAGIC))
- return be16_to_cpu(h.command);
+ unsigned int header_size = drbd_header_size(tconn);
+ struct packet_info pi;
+ int err;
- return 0xffff;
+ err = drbd_recv_short(sock, tconn->data.rbuf, header_size, 0);
+ if (err != header_size) {
+ if (err >= 0)
+ err = -EIO;
+ return err;
+ }
+ err = decode_header(tconn, tconn->data.rbuf, &pi);
+ if (err)
+ return err;
+ return pi.cmd;
}
/**
}
/* Gets called if a connection is established, or if a new minor gets created
in a connection */
-int drbd_connected(int vnr, void *p, void *data)
+int drbd_connected(struct drbd_conf *mdev)
{
- struct drbd_conf *mdev = (struct drbd_conf *)p;
int err;
atomic_set(&mdev->packet_seq, 0);
if (!err)
err = drbd_send_uuids(mdev);
if (!err)
- err = drbd_send_state(mdev);
+ err = drbd_send_current_state(mdev);
clear_bit(USE_DEGR_WFC_T, &mdev->flags);
clear_bit(RESIZE_PENDING, &mdev->flags);
+ mod_timer(&mdev->request_timer, jiffies + HZ); /* just start it here. */
return err;
}
* no point in trying again, please go standalone.
* -2 We do not have a network config...
*/
-static int drbd_connect(struct drbd_tconn *tconn)
+static int conn_connect(struct drbd_tconn *tconn)
{
- struct socket *sock, *msock;
- int try, h, ok;
+ struct drbd_socket sock, msock;
+ struct drbd_conf *mdev;
+ struct net_conf *nc;
+ int vnr, timeout, try, h, ok;
+ bool discard_my_data;
if (conn_request_state(tconn, NS(conn, C_WF_CONNECTION), CS_VERBOSE) < SS_SUCCESS)
return -2;
+ mutex_init(&sock.mutex);
+ sock.sbuf = tconn->data.sbuf;
+ sock.rbuf = tconn->data.rbuf;
+ sock.socket = NULL;
+ mutex_init(&msock.mutex);
+ msock.sbuf = tconn->meta.sbuf;
+ msock.rbuf = tconn->meta.rbuf;
+ msock.socket = NULL;
+
clear_bit(DISCARD_CONCURRENT, &tconn->flags);
/* Assume that the peer only understands protocol 80 until we know better. */
}
if (s) {
- if (!tconn->data.socket) {
- tconn->data.socket = s;
- drbd_send_fp(tconn, &tconn->data, P_HAND_SHAKE_S);
- } else if (!tconn->meta.socket) {
- tconn->meta.socket = s;
- drbd_send_fp(tconn, &tconn->meta, P_HAND_SHAKE_M);
+ if (!sock.socket) {
+ sock.socket = s;
+ send_first_packet(tconn, &sock, P_INITIAL_DATA);
+ } else if (!msock.socket) {
+ msock.socket = s;
+ send_first_packet(tconn, &msock, P_INITIAL_META);
} else {
- conn_err(tconn, "Logic error in drbd_connect()\n");
+ conn_err(tconn, "Logic error in conn_connect()\n");
goto out_release_sockets;
}
}
- if (tconn->data.socket && tconn->meta.socket) {
- schedule_timeout_interruptible(tconn->net_conf->ping_timeo*HZ/10);
- ok = drbd_socket_okay(&tconn->data.socket);
- ok = drbd_socket_okay(&tconn->meta.socket) && ok;
+ if (sock.socket && msock.socket) {
+ rcu_read_lock();
+ nc = rcu_dereference(tconn->net_conf);
+ timeout = nc->ping_timeo * HZ / 10;
+ rcu_read_unlock();
+ schedule_timeout_interruptible(timeout);
+ ok = drbd_socket_okay(&sock.socket);
+ ok = drbd_socket_okay(&msock.socket) && ok;
if (ok)
break;
}
retry:
s = drbd_wait_for_connect(tconn);
if (s) {
- try = drbd_recv_fp(tconn, s);
- drbd_socket_okay(&tconn->data.socket);
- drbd_socket_okay(&tconn->meta.socket);
+ try = receive_first_packet(tconn, s);
+ drbd_socket_okay(&sock.socket);
+ drbd_socket_okay(&msock.socket);
switch (try) {
- case P_HAND_SHAKE_S:
- if (tconn->data.socket) {
+ case P_INITIAL_DATA:
+ if (sock.socket) {
conn_warn(tconn, "initial packet S crossed\n");
- sock_release(tconn->data.socket);
+ sock_release(sock.socket);
}
- tconn->data.socket = s;
+ sock.socket = s;
break;
- case P_HAND_SHAKE_M:
- if (tconn->meta.socket) {
+ case P_INITIAL_META:
+ if (msock.socket) {
conn_warn(tconn, "initial packet M crossed\n");
- sock_release(tconn->meta.socket);
+ sock_release(msock.socket);
}
- tconn->meta.socket = s;
+ msock.socket = s;
set_bit(DISCARD_CONCURRENT, &tconn->flags);
break;
default:
goto out_release_sockets;
}
- if (tconn->data.socket && &tconn->meta.socket) {
- ok = drbd_socket_okay(&tconn->data.socket);
- ok = drbd_socket_okay(&tconn->meta.socket) && ok;
+ if (sock.socket && &msock.socket) {
+ ok = drbd_socket_okay(&sock.socket);
+ ok = drbd_socket_okay(&msock.socket) && ok;
if (ok)
break;
}
} while (1);
- sock = tconn->data.socket;
- msock = tconn->meta.socket;
-
- msock->sk->sk_reuse = 1; /* SO_REUSEADDR */
- sock->sk->sk_reuse = 1; /* SO_REUSEADDR */
+ sock.socket->sk->sk_reuse = 1; /* SO_REUSEADDR */
+ msock.socket->sk->sk_reuse = 1; /* SO_REUSEADDR */
- sock->sk->sk_allocation = GFP_NOIO;
- msock->sk->sk_allocation = GFP_NOIO;
+ sock.socket->sk->sk_allocation = GFP_NOIO;
+ msock.socket->sk->sk_allocation = GFP_NOIO;
- sock->sk->sk_priority = TC_PRIO_INTERACTIVE_BULK;
- msock->sk->sk_priority = TC_PRIO_INTERACTIVE;
+ sock.socket->sk->sk_priority = TC_PRIO_INTERACTIVE_BULK;
+ msock.socket->sk->sk_priority = TC_PRIO_INTERACTIVE;
/* NOT YET ...
- * sock->sk->sk_sndtimeo = tconn->net_conf->timeout*HZ/10;
- * sock->sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
- * first set it to the P_HAND_SHAKE timeout,
+ * sock.socket->sk->sk_sndtimeo = tconn->net_conf->timeout*HZ/10;
+ * sock.socket->sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
+ * first set it to the P_CONNECTION_FEATURES timeout,
* which we set to 4x the configured ping_timeout. */
- sock->sk->sk_sndtimeo =
- sock->sk->sk_rcvtimeo = tconn->net_conf->ping_timeo*4*HZ/10;
+ rcu_read_lock();
+ nc = rcu_dereference(tconn->net_conf);
+
+ sock.socket->sk->sk_sndtimeo =
+ sock.socket->sk->sk_rcvtimeo = nc->ping_timeo*4*HZ/10;
- msock->sk->sk_sndtimeo = tconn->net_conf->timeout*HZ/10;
- msock->sk->sk_rcvtimeo = tconn->net_conf->ping_int*HZ;
+ msock.socket->sk->sk_rcvtimeo = nc->ping_int*HZ;
+ timeout = nc->timeout * HZ / 10;
+ discard_my_data = nc->discard_my_data;
+ rcu_read_unlock();
+
+ msock.socket->sk->sk_sndtimeo = timeout;
/* we don't want delays.
* we use TCP_CORK where appropriate, though */
- drbd_tcp_nodelay(sock);
- drbd_tcp_nodelay(msock);
+ drbd_tcp_nodelay(sock.socket);
+ drbd_tcp_nodelay(msock.socket);
+ tconn->data.socket = sock.socket;
+ tconn->meta.socket = msock.socket;
tconn->last_received = jiffies;
- h = drbd_do_handshake(tconn);
+ h = drbd_do_features(tconn);
if (h <= 0)
return h;
}
}
+ tconn->data.socket->sk->sk_sndtimeo = timeout;
+ tconn->data.socket->sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
+
+ if (drbd_send_protocol(tconn) == -EOPNOTSUPP)
+ return -1;
+
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ kref_get(&mdev->kref);
+ rcu_read_unlock();
+
+ if (discard_my_data)
+ set_bit(DISCARD_MY_DATA, &mdev->flags);
+ else
+ clear_bit(DISCARD_MY_DATA, &mdev->flags);
+
+ drbd_connected(mdev);
+ kref_put(&mdev->kref, &drbd_minor_destroy);
+ rcu_read_lock();
+ }
+ rcu_read_unlock();
+
if (conn_request_state(tconn, NS(conn, C_WF_REPORT_PARAMS), CS_VERBOSE) < SS_SUCCESS)
return 0;
- sock->sk->sk_sndtimeo = tconn->net_conf->timeout*HZ/10;
- sock->sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
-
drbd_thread_start(&tconn->asender);
- if (drbd_send_protocol(tconn) == -EOPNOTSUPP)
- return -1;
+ mutex_lock(&tconn->conf_update);
+ /* The discard_my_data flag is a single-shot modifier to the next
+ * connection attempt, the handshake of which is now well underway.
+ * No need for rcu style copying of the whole struct
+ * just to clear a single value. */
+ tconn->net_conf->discard_my_data = 0;
+ mutex_unlock(&tconn->conf_update);
- return !idr_for_each(&tconn->volumes, drbd_connected, tconn);
+ return h;
out_release_sockets:
- if (tconn->data.socket) {
- sock_release(tconn->data.socket);
- tconn->data.socket = NULL;
- }
- if (tconn->meta.socket) {
- sock_release(tconn->meta.socket);
- tconn->meta.socket = NULL;
- }
+ if (sock.socket)
+ sock_release(sock.socket);
+ if (msock.socket)
+ sock_release(msock.socket);
return -1;
}
-static int decode_header(struct drbd_tconn *tconn, struct p_header *h, struct packet_info *pi)
+static int decode_header(struct drbd_tconn *tconn, void *header, struct packet_info *pi)
{
- if (h->h80.magic == cpu_to_be32(DRBD_MAGIC)) {
- pi->cmd = be16_to_cpu(h->h80.command);
- pi->size = be16_to_cpu(h->h80.length);
+ unsigned int header_size = drbd_header_size(tconn);
+
+ if (header_size == sizeof(struct p_header100) &&
+ *(__be32 *)header == cpu_to_be32(DRBD_MAGIC_100)) {
+ struct p_header100 *h = header;
+ if (h->pad != 0) {
+ conn_err(tconn, "Header padding is not zero\n");
+ return -EINVAL;
+ }
+ pi->vnr = be16_to_cpu(h->volume);
+ pi->cmd = be16_to_cpu(h->command);
+ pi->size = be32_to_cpu(h->length);
+ } else if (header_size == sizeof(struct p_header95) &&
+ *(__be16 *)header == cpu_to_be16(DRBD_MAGIC_BIG)) {
+ struct p_header95 *h = header;
+ pi->cmd = be16_to_cpu(h->command);
+ pi->size = be32_to_cpu(h->length);
pi->vnr = 0;
- } else if (h->h95.magic == cpu_to_be16(DRBD_MAGIC_BIG)) {
- pi->cmd = be16_to_cpu(h->h95.command);
- pi->size = be32_to_cpu(h->h95.length) & 0x00ffffff;
+ } else if (header_size == sizeof(struct p_header80) &&
+ *(__be32 *)header == cpu_to_be32(DRBD_MAGIC)) {
+ struct p_header80 *h = header;
+ pi->cmd = be16_to_cpu(h->command);
+ pi->size = be16_to_cpu(h->length);
pi->vnr = 0;
} else {
- conn_err(tconn, "magic?? on data m: 0x%08x c: %d l: %d\n",
- be32_to_cpu(h->h80.magic),
- be16_to_cpu(h->h80.command),
- be16_to_cpu(h->h80.length));
+ conn_err(tconn, "Wrong magic value 0x%08x in protocol version %d\n",
+ be32_to_cpu(*(__be32 *)header),
+ tconn->agreed_pro_version);
return -EINVAL;
}
+ pi->data = header + header_size;
return 0;
}
static int drbd_recv_header(struct drbd_tconn *tconn, struct packet_info *pi)
{
- struct p_header *h = tconn->data.rbuf;
+ void *buffer = tconn->data.rbuf;
int err;
- err = drbd_recv_all_warn(tconn, h, sizeof(*h));
+ err = drbd_recv_all_warn(tconn, buffer, drbd_header_size(tconn));
if (err)
return err;
- err = decode_header(tconn, h, pi);
+ err = decode_header(tconn, buffer, pi);
tconn->last_received = jiffies;
return err;
}
-static void drbd_flush(struct drbd_conf *mdev)
+static void drbd_flush(struct drbd_tconn *tconn)
{
int rv;
+ struct drbd_conf *mdev;
+ int vnr;
- if (mdev->write_ordering >= WO_bdev_flush && get_ldev(mdev)) {
- rv = blkdev_issue_flush(mdev->ldev->backing_bdev, GFP_KERNEL,
- NULL);
- if (rv) {
- dev_err(DEV, "local disk flush failed with status %d\n", rv);
- /* would rather check on EOPNOTSUPP, but that is not reliable.
- * don't try again for ANY return value != 0
- * if (rv == -EOPNOTSUPP) */
- drbd_bump_write_ordering(mdev, WO_drain_io);
+ if (tconn->write_ordering >= WO_bdev_flush) {
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ if (!get_ldev(mdev))
+ continue;
+ kref_get(&mdev->kref);
+ rcu_read_unlock();
+
+ rv = blkdev_issue_flush(mdev->ldev->backing_bdev,
+ GFP_NOIO, NULL);
+ if (rv) {
+ dev_info(DEV, "local disk flush failed with status %d\n", rv);
+ /* would rather check on EOPNOTSUPP, but that is not reliable.
+ * don't try again for ANY return value != 0
+ * if (rv == -EOPNOTSUPP) */
+ drbd_bump_write_ordering(tconn, WO_drain_io);
+ }
+ put_ldev(mdev);
+ kref_put(&mdev->kref, &drbd_minor_destroy);
+
+ rcu_read_lock();
+ if (rv)
+ break;
}
- put_ldev(mdev);
+ rcu_read_unlock();
}
}
* @epoch: Epoch object.
* @ev: Epoch event.
*/
-static enum finish_epoch drbd_may_finish_epoch(struct drbd_conf *mdev,
+static enum finish_epoch drbd_may_finish_epoch(struct drbd_tconn *tconn,
struct drbd_epoch *epoch,
enum epoch_event ev)
{
struct drbd_epoch *next_epoch;
enum finish_epoch rv = FE_STILL_LIVE;
- spin_lock(&mdev->epoch_lock);
+ spin_lock(&tconn->epoch_lock);
do {
next_epoch = NULL;
if (epoch_size != 0 &&
atomic_read(&epoch->active) == 0 &&
- test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags)) {
+ (test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags) || ev & EV_CLEANUP)) {
if (!(ev & EV_CLEANUP)) {
- spin_unlock(&mdev->epoch_lock);
- drbd_send_b_ack(mdev, epoch->barrier_nr, epoch_size);
- spin_lock(&mdev->epoch_lock);
+ spin_unlock(&tconn->epoch_lock);
+ drbd_send_b_ack(epoch->tconn, epoch->barrier_nr, epoch_size);
+ spin_lock(&tconn->epoch_lock);
}
- dec_unacked(mdev);
+#if 0
+ /* FIXME: dec unacked on connection, once we have
+ * something to count pending connection packets in. */
+ if (test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags))
+ dec_unacked(epoch->tconn);
+#endif
- if (mdev->current_epoch != epoch) {
+ if (tconn->current_epoch != epoch) {
next_epoch = list_entry(epoch->list.next, struct drbd_epoch, list);
list_del(&epoch->list);
ev = EV_BECAME_LAST | (ev & EV_CLEANUP);
- mdev->epochs--;
+ tconn->epochs--;
kfree(epoch);
if (rv == FE_STILL_LIVE)
/* atomic_set(&epoch->active, 0); is already zero */
if (rv == FE_STILL_LIVE)
rv = FE_RECYCLED;
- wake_up(&mdev->ee_wait);
}
}
epoch = next_epoch;
} while (1);
- spin_unlock(&mdev->epoch_lock);
+ spin_unlock(&tconn->epoch_lock);
return rv;
}
/**
* drbd_bump_write_ordering() - Fall back to an other write ordering method
- * @mdev: DRBD device.
+ * @tconn: DRBD connection.
* @wo: Write ordering method to try.
*/
-void drbd_bump_write_ordering(struct drbd_conf *mdev, enum write_ordering_e wo) __must_hold(local)
+void drbd_bump_write_ordering(struct drbd_tconn *tconn, enum write_ordering_e wo)
{
+ struct disk_conf *dc;
+ struct drbd_conf *mdev;
enum write_ordering_e pwo;
+ int vnr;
static char *write_ordering_str[] = {
[WO_none] = "none",
[WO_drain_io] = "drain",
[WO_bdev_flush] = "flush",
};
- pwo = mdev->write_ordering;
+ pwo = tconn->write_ordering;
wo = min(pwo, wo);
- if (wo == WO_bdev_flush && mdev->ldev->dc.no_disk_flush)
- wo = WO_drain_io;
- if (wo == WO_drain_io && mdev->ldev->dc.no_disk_drain)
- wo = WO_none;
- mdev->write_ordering = wo;
- if (pwo != mdev->write_ordering || wo == WO_bdev_flush)
- dev_info(DEV, "Method to ensure write ordering: %s\n", write_ordering_str[mdev->write_ordering]);
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ if (!get_ldev_if_state(mdev, D_ATTACHING))
+ continue;
+ dc = rcu_dereference(mdev->ldev->disk_conf);
+
+ if (wo == WO_bdev_flush && !dc->disk_flushes)
+ wo = WO_drain_io;
+ if (wo == WO_drain_io && !dc->disk_drain)
+ wo = WO_none;
+ put_ldev(mdev);
+ }
+ rcu_read_unlock();
+ tconn->write_ordering = wo;
+ if (pwo != tconn->write_ordering || wo == WO_bdev_flush)
+ conn_info(tconn, "Method to ensure write ordering: %s\n", write_ordering_str[tconn->write_ordering]);
}
/**
wake_up(&mdev->misc_wait);
}
-static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
+void conn_wait_active_ee_empty(struct drbd_tconn *tconn)
{
struct drbd_conf *mdev;
- int rv;
- struct p_barrier *p = tconn->data.rbuf;
- struct drbd_epoch *epoch;
+ int vnr;
- mdev = vnr_to_mdev(tconn, pi->vnr);
- if (!mdev)
- return -EIO;
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ kref_get(&mdev->kref);
+ rcu_read_unlock();
+ drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
+ kref_put(&mdev->kref, &drbd_minor_destroy);
+ rcu_read_lock();
+ }
+ rcu_read_unlock();
+}
- inc_unacked(mdev);
+static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
+{
+ int rv;
+ struct p_barrier *p = pi->data;
+ struct drbd_epoch *epoch;
- mdev->current_epoch->barrier_nr = p->barrier;
- rv = drbd_may_finish_epoch(mdev, mdev->current_epoch, EV_GOT_BARRIER_NR);
+ /* FIXME these are unacked on connection,
+ * not a specific (peer)device.
+ */
+ tconn->current_epoch->barrier_nr = p->barrier;
+ tconn->current_epoch->tconn = tconn;
+ rv = drbd_may_finish_epoch(tconn, tconn->current_epoch, EV_GOT_BARRIER_NR);
/* P_BARRIER_ACK may imply that the corresponding extent is dropped from
* the activity log, which means it would not be resynced in case the
* R_PRIMARY crashes now.
* Therefore we must send the barrier_ack after the barrier request was
* completed. */
- switch (mdev->write_ordering) {
+ switch (tconn->write_ordering) {
case WO_none:
if (rv == FE_RECYCLED)
return 0;
if (epoch)
break;
else
- dev_warn(DEV, "Allocation of an epoch failed, slowing down\n");
+ conn_warn(tconn, "Allocation of an epoch failed, slowing down\n");
/* Fall through */
case WO_bdev_flush:
case WO_drain_io:
- drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
- drbd_flush(mdev);
+ conn_wait_active_ee_empty(tconn);
+ drbd_flush(tconn);
- if (atomic_read(&mdev->current_epoch->epoch_size)) {
+ if (atomic_read(&tconn->current_epoch->epoch_size)) {
epoch = kmalloc(sizeof(struct drbd_epoch), GFP_NOIO);
if (epoch)
break;
}
- epoch = mdev->current_epoch;
- wait_event(mdev->ee_wait, atomic_read(&epoch->epoch_size) == 0);
-
- D_ASSERT(atomic_read(&epoch->active) == 0);
- D_ASSERT(epoch->flags == 0);
-
return 0;
default:
- dev_err(DEV, "Strangeness in mdev->write_ordering %d\n", mdev->write_ordering);
+ conn_err(tconn, "Strangeness in tconn->write_ordering %d\n", tconn->write_ordering);
return -EIO;
}
atomic_set(&epoch->epoch_size, 0);
atomic_set(&epoch->active, 0);
- spin_lock(&mdev->epoch_lock);
- if (atomic_read(&mdev->current_epoch->epoch_size)) {
- list_add(&epoch->list, &mdev->current_epoch->list);
- mdev->current_epoch = epoch;
- mdev->epochs++;
+ spin_lock(&tconn->epoch_lock);
+ if (atomic_read(&tconn->current_epoch->epoch_size)) {
+ list_add(&epoch->list, &tconn->current_epoch->list);
+ tconn->current_epoch = epoch;
+ tconn->epochs++;
} else {
/* The current_epoch got recycled while we allocated this one... */
kfree(epoch);
}
- spin_unlock(&mdev->epoch_lock);
+ spin_unlock(&tconn->epoch_lock);
return 0;
}
void *dig_vv = mdev->tconn->int_dig_vv;
unsigned long *data;
- dgs = (mdev->tconn->agreed_pro_version >= 87 && mdev->tconn->integrity_r_tfm) ?
- crypto_hash_digestsize(mdev->tconn->integrity_r_tfm) : 0;
-
- if (dgs) {
+ dgs = 0;
+ if (mdev->tconn->peer_integrity_tfm) {
+ dgs = crypto_hash_digestsize(mdev->tconn->peer_integrity_tfm);
+ /*
+ * FIXME: Receive the incoming digest into the receive buffer
+ * here, together with its struct p_data?
+ */
err = drbd_recv_all_warn(mdev->tconn, dig_in, dgs);
if (err)
return NULL;
+ data_size -= dgs;
}
- data_size -= dgs;
-
if (!expect(data_size != 0))
return NULL;
if (!expect(IS_ALIGNED(data_size, 512)))
/* GFP_NOIO, because we must not cause arbitrary write-out: in a DRBD
* "criss-cross" setup, that might cause write-out on some other DRBD,
* which in turn might block on the other node at this very place. */
- peer_req = drbd_alloc_ee(mdev, id, sector, data_size, GFP_NOIO);
+ peer_req = drbd_alloc_peer_req(mdev, id, sector, data_size, GFP_NOIO);
if (!peer_req)
return NULL;
}
kunmap(page);
if (err) {
- drbd_free_ee(mdev, peer_req);
+ drbd_free_peer_req(mdev, peer_req);
return NULL;
}
ds -= len;
}
if (dgs) {
- drbd_csum_ee(mdev, mdev->tconn->integrity_r_tfm, peer_req, dig_vv);
+ drbd_csum_ee(mdev, mdev->tconn->peer_integrity_tfm, peer_req, dig_vv);
if (memcmp(dig_in, dig_vv, dgs)) {
dev_err(DEV, "Digest integrity check FAILED: %llus +%u\n",
(unsigned long long)sector, data_size);
- drbd_free_ee(mdev, peer_req);
+ drbd_free_peer_req(mdev, peer_req);
return NULL;
}
}
if (!data_size)
return 0;
- page = drbd_pp_alloc(mdev, 1, 1);
+ page = drbd_alloc_pages(mdev, 1, 1);
data = kmap(page);
while (data_size) {
data_size -= len;
}
kunmap(page);
- drbd_pp_free(mdev, page, 0);
+ drbd_free_pages(mdev, page, 0);
return err;
}
void *dig_in = mdev->tconn->int_dig_in;
void *dig_vv = mdev->tconn->int_dig_vv;
- dgs = (mdev->tconn->agreed_pro_version >= 87 && mdev->tconn->integrity_r_tfm) ?
- crypto_hash_digestsize(mdev->tconn->integrity_r_tfm) : 0;
-
- if (dgs) {
+ dgs = 0;
+ if (mdev->tconn->peer_integrity_tfm) {
+ dgs = crypto_hash_digestsize(mdev->tconn->peer_integrity_tfm);
err = drbd_recv_all_warn(mdev->tconn, dig_in, dgs);
if (err)
return err;
+ data_size -= dgs;
}
- data_size -= dgs;
-
/* optimistically update recv_cnt. if receiving fails below,
* we disconnect anyways, and counters will be reset. */
mdev->recv_cnt += data_size>>9;
}
if (dgs) {
- drbd_csum_bio(mdev, mdev->tconn->integrity_r_tfm, bio, dig_vv);
+ drbd_csum_bio(mdev, mdev->tconn->peer_integrity_tfm, bio, dig_vv);
if (memcmp(dig_in, dig_vv, dgs)) {
dev_err(DEV, "Digest integrity check FAILED. Broken NICs?\n");
return -EINVAL;
return 0;
}
-/* e_end_resync_block() is called via
- * drbd_process_done_ee() by asender only */
+/*
+ * e_end_resync_block() is called in asender context via
+ * drbd_finish_peer_reqs().
+ */
static int e_end_resync_block(struct drbd_work *w, int unused)
{
struct drbd_peer_request *peer_req =
list_del(&peer_req->w.list);
spin_unlock_irq(&mdev->tconn->req_lock);
- drbd_free_ee(mdev, peer_req);
+ drbd_free_peer_req(mdev, peer_req);
fail:
put_ldev(mdev);
return -EIO;
if (drbd_contains_interval(root, sector, &req->i) && req->i.local)
return req;
if (!missing_ok) {
- dev_err(DEV, "%s: failed to find request %lu, sector %llus\n", func,
+ dev_err(DEV, "%s: failed to find request 0x%lx, sector %llus\n", func,
(unsigned long)id, (unsigned long long)sector);
}
return NULL;
struct drbd_request *req;
sector_t sector;
int err;
- struct p_data *p = tconn->data.rbuf;
+ struct p_data *p = pi->data;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
struct drbd_conf *mdev;
sector_t sector;
int err;
- struct p_data *p = tconn->data.rbuf;
+ struct p_data *p = pi->data;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
return err;
}
-static int w_restart_write(struct drbd_work *w, int cancel)
-{
- struct drbd_request *req = container_of(w, struct drbd_request, w);
- struct drbd_conf *mdev = w->mdev;
- struct bio *bio;
- unsigned long start_time;
- unsigned long flags;
-
- spin_lock_irqsave(&mdev->tconn->req_lock, flags);
- if (!expect(req->rq_state & RQ_POSTPONED)) {
- spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
- return -EIO;
- }
- bio = req->master_bio;
- start_time = req->start_time;
- /* Postponed requests will not have their master_bio completed! */
- __req_mod(req, DISCARD_WRITE, NULL);
- spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
-
- while (__drbd_make_request(mdev, bio, start_time))
- /* retry */ ;
- return 0;
-}
-
static void restart_conflicting_writes(struct drbd_conf *mdev,
sector_t sector, int size)
{
if (req->rq_state & RQ_LOCAL_PENDING ||
!(req->rq_state & RQ_POSTPONED))
continue;
- if (expect(list_empty(&req->w.list))) {
- req->w.mdev = mdev;
- req->w.cb = w_restart_write;
- drbd_queue_work(&mdev->tconn->data.work, &req->w);
- }
+ /* as it is RQ_POSTPONED, this will cause it to
+ * be queued on the retry workqueue. */
+ __req_mod(req, DISCARD_WRITE, NULL);
}
}
-/* e_end_block() is called via drbd_process_done_ee().
- * this means this function only runs in the asender thread
+/*
+ * e_end_block() is called in asender context via drbd_finish_peer_reqs().
*/
static int e_end_block(struct drbd_work *w, int cancel)
{
sector_t sector = peer_req->i.sector;
int err = 0, pcmd;
- if (mdev->tconn->net_conf->wire_protocol == DRBD_PROT_C) {
+ if (peer_req->flags & EE_SEND_WRITE_ACK) {
if (likely((peer_req->flags & EE_WAS_ERROR) == 0)) {
pcmd = (mdev->state.conn >= C_SYNC_SOURCE &&
mdev->state.conn <= C_PAUSED_SYNC_T &&
}
/* 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) {
+ if (peer_req->flags & EE_IN_INTERVAL_TREE) {
spin_lock_irq(&mdev->tconn->req_lock);
D_ASSERT(!drbd_interval_empty(&peer_req->i));
drbd_remove_epoch_entry_interval(mdev, peer_req);
} else
D_ASSERT(drbd_interval_empty(&peer_req->i));
- drbd_may_finish_epoch(mdev, peer_req->epoch, EV_PUT + (cancel ? EV_CLEANUP : 0));
+ drbd_may_finish_epoch(mdev->tconn, peer_req->epoch, EV_PUT + (cancel ? EV_CLEANUP : 0));
return err;
}
static bool need_peer_seq(struct drbd_conf *mdev)
{
struct drbd_tconn *tconn = mdev->tconn;
+ int tp;
/*
* We only need to keep track of the last packet_seq number of our peer
* if we are in dual-primary mode and we have the discard flag set; see
* handle_write_conflicts().
*/
- return tconn->net_conf->two_primaries &&
- test_bit(DISCARD_CONCURRENT, &tconn->flags);
+
+ rcu_read_lock();
+ tp = rcu_dereference(mdev->tconn->net_conf)->two_primaries;
+ rcu_read_unlock();
+
+ return tp && test_bit(DISCARD_CONCURRENT, &tconn->flags);
}
static void update_peer_seq(struct drbd_conf *mdev, unsigned int peer_seq)
}
}
+static inline int overlaps(sector_t s1, int l1, sector_t s2, int l2)
+{
+ return !((s1 + (l1>>9) <= s2) || (s1 >= s2 + (l2>>9)));
+}
+
+/* maybe change sync_ee into interval trees as well? */
+static bool overlaping_resync_write(struct drbd_conf *mdev, struct drbd_peer_request *peer_req)
+{
+ struct drbd_peer_request *rs_req;
+ bool rv = 0;
+
+ spin_lock_irq(&mdev->tconn->req_lock);
+ list_for_each_entry(rs_req, &mdev->sync_ee, w.list) {
+ if (overlaps(peer_req->i.sector, peer_req->i.size,
+ rs_req->i.sector, rs_req->i.size)) {
+ rv = 1;
+ break;
+ }
+ }
+ spin_unlock_irq(&mdev->tconn->req_lock);
+
+ if (rv)
+ dev_warn(DEV, "WARN: Avoiding concurrent data/resync write to single sector.\n");
+
+ return rv;
+}
+
/* Called from receive_Data.
* Synchronize packets on sock with packets on msock.
*
}
prepare_to_wait(&mdev->seq_wait, &wait, TASK_INTERRUPTIBLE);
spin_unlock(&mdev->peer_seq_lock);
- timeout = mdev->tconn->net_conf->ping_timeo*HZ/10;
+ rcu_read_lock();
+ timeout = rcu_dereference(mdev->tconn->net_conf)->ping_timeo*HZ/10;
+ rcu_read_unlock();
timeout = schedule_timeout(timeout);
spin_lock(&mdev->peer_seq_lock);
if (!timeout) {
struct drbd_conf *mdev;
sector_t sector;
struct drbd_peer_request *peer_req;
- struct p_data *p = tconn->data.rbuf;
+ struct p_data *p = pi->data;
u32 peer_seq = be32_to_cpu(p->seq_num);
int rw = WRITE;
u32 dp_flags;
- int err;
+ int err, tp;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
err = wait_for_and_update_peer_seq(mdev, peer_seq);
drbd_send_ack_dp(mdev, P_NEG_ACK, p, pi->size);
- atomic_inc(&mdev->current_epoch->epoch_size);
+ atomic_inc(&tconn->current_epoch->epoch_size);
err2 = drbd_drain_block(mdev, pi->size);
if (!err)
err = err2;
if (dp_flags & DP_MAY_SET_IN_SYNC)
peer_req->flags |= EE_MAY_SET_IN_SYNC;
- spin_lock(&mdev->epoch_lock);
- peer_req->epoch = mdev->current_epoch;
+ spin_lock(&tconn->epoch_lock);
+ peer_req->epoch = tconn->current_epoch;
atomic_inc(&peer_req->epoch->epoch_size);
atomic_inc(&peer_req->epoch->active);
- spin_unlock(&mdev->epoch_lock);
+ spin_unlock(&tconn->epoch_lock);
- if (mdev->tconn->net_conf->two_primaries) {
+ rcu_read_lock();
+ tp = rcu_dereference(mdev->tconn->net_conf)->two_primaries;
+ rcu_read_unlock();
+ if (tp) {
+ peer_req->flags |= EE_IN_INTERVAL_TREE;
err = wait_for_and_update_peer_seq(mdev, peer_seq);
if (err)
goto out_interrupted;
list_add(&peer_req->w.list, &mdev->active_ee);
spin_unlock_irq(&mdev->tconn->req_lock);
- switch (mdev->tconn->net_conf->wire_protocol) {
- case DRBD_PROT_C:
+ if (mdev->state.conn == C_SYNC_TARGET)
+ wait_event(mdev->ee_wait, !overlaping_resync_write(mdev, peer_req));
+
+ if (mdev->tconn->agreed_pro_version < 100) {
+ rcu_read_lock();
+ switch (rcu_dereference(mdev->tconn->net_conf)->wire_protocol) {
+ case DRBD_PROT_C:
+ dp_flags |= DP_SEND_WRITE_ACK;
+ break;
+ case DRBD_PROT_B:
+ dp_flags |= DP_SEND_RECEIVE_ACK;
+ break;
+ }
+ rcu_read_unlock();
+ }
+
+ if (dp_flags & DP_SEND_WRITE_ACK) {
+ peer_req->flags |= EE_SEND_WRITE_ACK;
inc_unacked(mdev);
/* corresponding dec_unacked() in e_end_block()
* respective _drbd_clear_done_ee */
- break;
- case DRBD_PROT_B:
+ }
+
+ if (dp_flags & DP_SEND_RECEIVE_ACK) {
/* I really don't like it that the receiver thread
* sends on the msock, but anyways */
drbd_send_ack(mdev, P_RECV_ACK, peer_req);
- break;
- case DRBD_PROT_A:
- /* nothing to do */
- break;
}
if (mdev->state.pdsk < D_INCONSISTENT) {
drbd_set_out_of_sync(mdev, peer_req->i.sector, peer_req->i.size);
peer_req->flags |= EE_CALL_AL_COMPLETE_IO;
peer_req->flags &= ~EE_MAY_SET_IN_SYNC;
- drbd_al_begin_io(mdev, peer_req->i.sector);
+ drbd_al_begin_io(mdev, &peer_req->i);
}
err = drbd_submit_peer_request(mdev, peer_req, rw, DRBD_FAULT_DT_WR);
drbd_remove_epoch_entry_interval(mdev, peer_req);
spin_unlock_irq(&mdev->tconn->req_lock);
if (peer_req->flags & EE_CALL_AL_COMPLETE_IO)
- drbd_al_complete_io(mdev, peer_req->i.sector);
+ drbd_al_complete_io(mdev, &peer_req->i);
out_interrupted:
- drbd_may_finish_epoch(mdev, peer_req->epoch, EV_PUT + EV_CLEANUP);
+ drbd_may_finish_epoch(tconn, peer_req->epoch, EV_PUT + EV_CLEANUP);
put_ldev(mdev);
- drbd_free_ee(mdev, peer_req);
+ drbd_free_peer_req(mdev, peer_req);
return err;
}
struct lc_element *tmp;
int curr_events;
int throttle = 0;
+ unsigned int c_min_rate;
+
+ rcu_read_lock();
+ c_min_rate = rcu_dereference(mdev->ldev->disk_conf)->c_min_rate;
+ rcu_read_unlock();
/* feature disabled? */
- if (mdev->ldev->dc.c_min_rate == 0)
+ if (c_min_rate == 0)
return 0;
spin_lock_irq(&mdev->al_lock);
db = mdev->rs_mark_left[i] - rs_left;
dbdt = Bit2KB(db/dt);
- if (dbdt > mdev->ldev->dc.c_min_rate)
+ if (dbdt > c_min_rate)
throttle = 1;
}
return throttle;
struct digest_info *di = NULL;
int size, verb;
unsigned int fault_type;
- struct p_block_req *p = tconn->data.rbuf;
+ struct p_block_req *p = pi->data;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
/* GFP_NOIO, because we must not cause arbitrary write-out: in a DRBD
* "criss-cross" setup, that might cause write-out on some other DRBD,
* which in turn might block on the other node at this very place. */
- peer_req = drbd_alloc_ee(mdev, p->block_id, sector, size, GFP_NOIO);
+ peer_req = drbd_alloc_peer_req(mdev, p->block_id, sector, size, GFP_NOIO);
if (!peer_req) {
put_ldev(mdev);
return -ENOMEM;
out_free_e:
put_ldev(mdev);
- drbd_free_ee(mdev, peer_req);
+ drbd_free_peer_req(mdev, peer_req);
return -EIO;
}
{
int self, peer, rv = -100;
unsigned long ch_self, ch_peer;
+ enum drbd_after_sb_p after_sb_0p;
self = mdev->ldev->md.uuid[UI_BITMAP] & 1;
peer = mdev->p_uuid[UI_BITMAP] & 1;
ch_peer = mdev->p_uuid[UI_SIZE];
ch_self = mdev->comm_bm_set;
- switch (mdev->tconn->net_conf->after_sb_0p) {
+ rcu_read_lock();
+ after_sb_0p = rcu_dereference(mdev->tconn->net_conf)->after_sb_0p;
+ rcu_read_unlock();
+ switch (after_sb_0p) {
case ASB_CONSENSUS:
case ASB_DISCARD_SECONDARY:
case ASB_CALL_HELPER:
+ case ASB_VIOLENTLY:
dev_err(DEV, "Configuration error.\n");
break;
case ASB_DISCONNECT:
if (ch_peer == 0) { rv = 1; break; }
if (ch_self == 0) { rv = -1; break; }
}
- if (mdev->tconn->net_conf->after_sb_0p == ASB_DISCARD_ZERO_CHG)
+ if (after_sb_0p == ASB_DISCARD_ZERO_CHG)
break;
case ASB_DISCARD_LEAST_CHG:
if (ch_self < ch_peer)
static int drbd_asb_recover_1p(struct drbd_conf *mdev) __must_hold(local)
{
int hg, rv = -100;
+ enum drbd_after_sb_p after_sb_1p;
- switch (mdev->tconn->net_conf->after_sb_1p) {
+ rcu_read_lock();
+ after_sb_1p = rcu_dereference(mdev->tconn->net_conf)->after_sb_1p;
+ rcu_read_unlock();
+ switch (after_sb_1p) {
case ASB_DISCARD_YOUNGER_PRI:
case ASB_DISCARD_OLDER_PRI:
case ASB_DISCARD_LEAST_CHG:
case ASB_DISCARD_LOCAL:
case ASB_DISCARD_REMOTE:
+ case ASB_DISCARD_ZERO_CHG:
dev_err(DEV, "Configuration error.\n");
break;
case ASB_DISCONNECT:
static int drbd_asb_recover_2p(struct drbd_conf *mdev) __must_hold(local)
{
int hg, rv = -100;
+ enum drbd_after_sb_p after_sb_2p;
- switch (mdev->tconn->net_conf->after_sb_2p) {
+ rcu_read_lock();
+ after_sb_2p = rcu_dereference(mdev->tconn->net_conf)->after_sb_2p;
+ rcu_read_unlock();
+ switch (after_sb_2p) {
case ASB_DISCARD_YOUNGER_PRI:
case ASB_DISCARD_OLDER_PRI:
case ASB_DISCARD_LEAST_CHG:
case ASB_DISCARD_REMOTE:
case ASB_CONSENSUS:
case ASB_DISCARD_SECONDARY:
+ case ASB_DISCARD_ZERO_CHG:
dev_err(DEV, "Configuration error.\n");
break;
case ASB_VIOLENTLY:
static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_role peer_role,
enum drbd_disk_state peer_disk) __must_hold(local)
{
- int hg, rule_nr;
enum drbd_conns rv = C_MASK;
enum drbd_disk_state mydisk;
+ struct net_conf *nc;
+ int hg, rule_nr, rr_conflict, tentative;
mydisk = mdev->state.disk;
if (mydisk == D_NEGOTIATING)
if (abs(hg) == 100)
drbd_khelper(mdev, "initial-split-brain");
- if (hg == 100 || (hg == -100 && mdev->tconn->net_conf->always_asbp)) {
+ rcu_read_lock();
+ nc = rcu_dereference(mdev->tconn->net_conf);
+
+ if (hg == 100 || (hg == -100 && nc->always_asbp)) {
int pcount = (mdev->state.role == R_PRIMARY)
+ (peer_role == R_PRIMARY);
int forced = (hg == -100);
}
if (hg == -100) {
- if (mdev->tconn->net_conf->want_lose && !(mdev->p_uuid[UI_FLAGS]&1))
+ if (test_bit(DISCARD_MY_DATA, &mdev->flags) && !(mdev->p_uuid[UI_FLAGS]&1))
hg = -1;
- if (!mdev->tconn->net_conf->want_lose && (mdev->p_uuid[UI_FLAGS]&1))
+ if (!test_bit(DISCARD_MY_DATA, &mdev->flags) && (mdev->p_uuid[UI_FLAGS]&1))
hg = 1;
if (abs(hg) < 100)
"Sync from %s node\n",
(hg < 0) ? "peer" : "this");
}
+ rr_conflict = nc->rr_conflict;
+ tentative = nc->tentative;
+ rcu_read_unlock();
if (hg == -100) {
/* FIXME this log message is not correct if we end up here
if (hg < 0 && /* by intention we do not use mydisk here. */
mdev->state.role == R_PRIMARY && mdev->state.disk >= D_CONSISTENT) {
- switch (mdev->tconn->net_conf->rr_conflict) {
+ switch (rr_conflict) {
case ASB_CALL_HELPER:
drbd_khelper(mdev, "pri-lost");
/* fall through */
}
}
- if (mdev->tconn->net_conf->dry_run || test_bit(CONN_DRY_RUN, &mdev->tconn->flags)) {
+ if (tentative || test_bit(CONN_DRY_RUN, &mdev->tconn->flags)) {
if (hg == 0)
dev_info(DEV, "dry-run connect: No resync, would become Connected immediately.\n");
else
return rv;
}
-/* returns 1 if invalid */
-static int cmp_after_sb(enum drbd_after_sb_p peer, enum drbd_after_sb_p self)
+static enum drbd_after_sb_p convert_after_sb(enum drbd_after_sb_p peer)
{
/* ASB_DISCARD_REMOTE - ASB_DISCARD_LOCAL is valid */
- if ((peer == ASB_DISCARD_REMOTE && self == ASB_DISCARD_LOCAL) ||
- (self == ASB_DISCARD_REMOTE && peer == ASB_DISCARD_LOCAL))
- return 0;
+ if (peer == ASB_DISCARD_REMOTE)
+ return ASB_DISCARD_LOCAL;
/* any other things with ASB_DISCARD_REMOTE or ASB_DISCARD_LOCAL are invalid */
- if (peer == ASB_DISCARD_REMOTE || peer == ASB_DISCARD_LOCAL ||
- self == ASB_DISCARD_REMOTE || self == ASB_DISCARD_LOCAL)
- return 1;
+ if (peer == ASB_DISCARD_LOCAL)
+ return ASB_DISCARD_REMOTE;
/* everything else is valid if they are equal on both sides. */
- if (peer == self)
- return 0;
-
- /* everything es is invalid. */
- return 1;
+ return peer;
}
static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
{
- struct p_protocol *p = tconn->data.rbuf;
- 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] = "";
+ struct p_protocol *p = pi->data;
+ enum drbd_after_sb_p p_after_sb_0p, p_after_sb_1p, p_after_sb_2p;
+ int p_proto, p_discard_my_data, p_two_primaries, cf;
+ struct net_conf *nc, *old_net_conf, *new_net_conf = NULL;
+ char integrity_alg[SHARED_SECRET_MAX] = "";
+ struct crypto_hash *peer_integrity_tfm = NULL;
+ void *int_dig_in = NULL, *int_dig_vv = NULL;
p_proto = be32_to_cpu(p->protocol);
p_after_sb_0p = be32_to_cpu(p->after_sb_0p);
p_after_sb_2p = be32_to_cpu(p->after_sb_2p);
p_two_primaries = be32_to_cpu(p->two_primaries);
cf = be32_to_cpu(p->conn_flags);
- p_want_lose = cf & CF_WANT_LOSE;
-
- clear_bit(CONN_DRY_RUN, &tconn->flags);
+ p_discard_my_data = cf & CF_DISCARD_MY_DATA;
- if (cf & CF_DRY_RUN)
- set_bit(CONN_DRY_RUN, &tconn->flags);
+ if (tconn->agreed_pro_version >= 87) {
+ int err;
- if (p_proto != tconn->net_conf->wire_protocol) {
- conn_err(tconn, "incompatible communication protocols\n");
- goto disconnect;
+ if (pi->size > sizeof(integrity_alg))
+ return -EIO;
+ err = drbd_recv_all(tconn, integrity_alg, pi->size);
+ if (err)
+ return err;
+ integrity_alg[SHARED_SECRET_MAX - 1] = 0;
}
- if (cmp_after_sb(p_after_sb_0p, tconn->net_conf->after_sb_0p)) {
- conn_err(tconn, "incompatible after-sb-0pri settings\n");
- goto disconnect;
- }
+ if (pi->cmd != P_PROTOCOL_UPDATE) {
+ clear_bit(CONN_DRY_RUN, &tconn->flags);
- if (cmp_after_sb(p_after_sb_1p, tconn->net_conf->after_sb_1p)) {
- conn_err(tconn, "incompatible after-sb-1pri settings\n");
- goto disconnect;
- }
+ if (cf & CF_DRY_RUN)
+ set_bit(CONN_DRY_RUN, &tconn->flags);
- if (cmp_after_sb(p_after_sb_2p, tconn->net_conf->after_sb_2p)) {
- conn_err(tconn, "incompatible after-sb-2pri settings\n");
- goto disconnect;
- }
+ rcu_read_lock();
+ nc = rcu_dereference(tconn->net_conf);
- if (p_want_lose && tconn->net_conf->want_lose) {
- conn_err(tconn, "both sides have the 'want_lose' flag set\n");
- goto disconnect;
- }
+ if (p_proto != nc->wire_protocol) {
+ conn_err(tconn, "incompatible %s settings\n", "protocol");
+ goto disconnect_rcu_unlock;
+ }
- if (p_two_primaries != tconn->net_conf->two_primaries) {
- conn_err(tconn, "incompatible setting of the two-primaries options\n");
- goto disconnect;
+ if (convert_after_sb(p_after_sb_0p) != nc->after_sb_0p) {
+ conn_err(tconn, "incompatible %s settings\n", "after-sb-0pri");
+ goto disconnect_rcu_unlock;
+ }
+
+ if (convert_after_sb(p_after_sb_1p) != nc->after_sb_1p) {
+ conn_err(tconn, "incompatible %s settings\n", "after-sb-1pri");
+ goto disconnect_rcu_unlock;
+ }
+
+ if (convert_after_sb(p_after_sb_2p) != nc->after_sb_2p) {
+ conn_err(tconn, "incompatible %s settings\n", "after-sb-2pri");
+ goto disconnect_rcu_unlock;
+ }
+
+ if (p_discard_my_data && nc->discard_my_data) {
+ conn_err(tconn, "incompatible %s settings\n", "discard-my-data");
+ goto disconnect_rcu_unlock;
+ }
+
+ if (p_two_primaries != nc->two_primaries) {
+ conn_err(tconn, "incompatible %s settings\n", "allow-two-primaries");
+ goto disconnect_rcu_unlock;
+ }
+
+ if (strcmp(integrity_alg, nc->integrity_alg)) {
+ conn_err(tconn, "incompatible %s settings\n", "data-integrity-alg");
+ goto disconnect_rcu_unlock;
+ }
+
+ rcu_read_unlock();
}
- if (tconn->agreed_pro_version >= 87) {
- unsigned char *my_alg = tconn->net_conf->integrity_alg;
- int err;
+ if (integrity_alg[0]) {
+ int hash_size;
- err = drbd_recv_all(tconn, p_integrity_alg, pi->size);
- if (err)
- return err;
+ /*
+ * We can only change the peer data integrity algorithm
+ * here. Changing our own data integrity algorithm
+ * requires that we send a P_PROTOCOL_UPDATE packet at
+ * the same time; otherwise, the peer has no way to
+ * tell between which packets the algorithm should
+ * change.
+ */
+
+ peer_integrity_tfm = crypto_alloc_hash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
+ if (!peer_integrity_tfm) {
+ conn_err(tconn, "peer data-integrity-alg %s not supported\n",
+ integrity_alg);
+ goto disconnect;
+ }
- p_integrity_alg[SHARED_SECRET_MAX-1] = 0;
- if (strcmp(p_integrity_alg, my_alg)) {
- conn_err(tconn, "incompatible setting of the data-integrity-alg\n");
+ hash_size = crypto_hash_digestsize(peer_integrity_tfm);
+ int_dig_in = kmalloc(hash_size, GFP_KERNEL);
+ int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
+ if (!(int_dig_in && int_dig_vv)) {
+ conn_err(tconn, "Allocation of buffers for data integrity checking failed\n");
goto disconnect;
}
- conn_info(tconn, "data-integrity-alg: %s\n",
- my_alg[0] ? my_alg : (unsigned char *)"<not-used>");
}
+ new_net_conf = kmalloc(sizeof(struct net_conf), GFP_KERNEL);
+ if (!new_net_conf) {
+ conn_err(tconn, "Allocation of new net_conf failed\n");
+ goto disconnect;
+ }
+
+ mutex_lock(&tconn->data.mutex);
+ mutex_lock(&tconn->conf_update);
+ old_net_conf = tconn->net_conf;
+ *new_net_conf = *old_net_conf;
+
+ new_net_conf->wire_protocol = p_proto;
+ new_net_conf->after_sb_0p = convert_after_sb(p_after_sb_0p);
+ new_net_conf->after_sb_1p = convert_after_sb(p_after_sb_1p);
+ new_net_conf->after_sb_2p = convert_after_sb(p_after_sb_2p);
+ new_net_conf->two_primaries = p_two_primaries;
+
+ rcu_assign_pointer(tconn->net_conf, new_net_conf);
+ mutex_unlock(&tconn->conf_update);
+ mutex_unlock(&tconn->data.mutex);
+
+ crypto_free_hash(tconn->peer_integrity_tfm);
+ kfree(tconn->int_dig_in);
+ kfree(tconn->int_dig_vv);
+ tconn->peer_integrity_tfm = peer_integrity_tfm;
+ tconn->int_dig_in = int_dig_in;
+ tconn->int_dig_vv = int_dig_vv;
+
+ if (strcmp(old_net_conf->integrity_alg, integrity_alg))
+ conn_info(tconn, "peer data-integrity-alg: %s\n",
+ integrity_alg[0] ? integrity_alg : "(none)");
+
+ synchronize_rcu();
+ kfree(old_net_conf);
return 0;
+disconnect_rcu_unlock:
+ rcu_read_unlock();
disconnect:
+ crypto_free_hash(peer_integrity_tfm);
+ kfree(int_dig_in);
+ kfree(int_dig_vv);
conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
return -EIO;
}
alg, name, PTR_ERR(tfm));
return tfm;
}
- if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm))) {
- crypto_free_hash(tfm);
- dev_err(DEV, "\"%s\" is not a digest (%s)\n", alg, name);
- return ERR_PTR(-EINVAL);
- }
return tfm;
}
*/
static int config_unknown_volume(struct drbd_tconn *tconn, struct packet_info *pi)
{
- conn_warn(tconn, "Volume %u unknown; ignoring %s packet\n",
- pi->vnr, cmdname(pi->cmd));
+ conn_warn(tconn, "%s packet received for volume %u, which is not configured locally\n",
+ cmdname(pi->cmd), pi->vnr);
return ignore_remaining_packet(tconn, pi);
}
static int receive_SyncParam(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_rs_param_95 *p = tconn->data.rbuf;
+ struct p_rs_param_95 *p;
unsigned int header_size, data_size, exp_max_sz;
struct crypto_hash *verify_tfm = NULL;
struct crypto_hash *csums_tfm = NULL;
+ struct net_conf *old_net_conf, *new_net_conf = NULL;
+ struct disk_conf *old_disk_conf = NULL, *new_disk_conf = NULL;
const int apv = tconn->agreed_pro_version;
- int *rs_plan_s = NULL;
+ struct fifo_buffer *old_plan = NULL, *new_plan = NULL;
int fifo_size = 0;
int err;
}
if (apv <= 88) {
- header_size = sizeof(struct p_rs_param) - sizeof(struct p_header);
+ header_size = sizeof(struct p_rs_param);
data_size = pi->size - header_size;
} else if (apv <= 94) {
- header_size = sizeof(struct p_rs_param_89) - sizeof(struct p_header);
+ header_size = sizeof(struct p_rs_param_89);
data_size = pi->size - header_size;
D_ASSERT(data_size == 0);
} else {
- header_size = sizeof(struct p_rs_param_95) - sizeof(struct p_header);
+ header_size = sizeof(struct p_rs_param_95);
data_size = pi->size - header_size;
D_ASSERT(data_size == 0);
}
/* initialize verify_alg and csums_alg */
+ p = pi->data;
memset(p->verify_alg, 0, 2 * SHARED_SECRET_MAX);
- err = drbd_recv_all(mdev->tconn, &p->head.payload, header_size);
+ err = drbd_recv_all(mdev->tconn, p, header_size);
if (err)
return err;
+ mutex_lock(&mdev->tconn->conf_update);
+ old_net_conf = mdev->tconn->net_conf;
if (get_ldev(mdev)) {
- mdev->ldev->dc.resync_rate = be32_to_cpu(p->rate);
- put_ldev(mdev);
+ new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL);
+ if (!new_disk_conf) {
+ put_ldev(mdev);
+ mutex_unlock(&mdev->tconn->conf_update);
+ dev_err(DEV, "Allocation of new disk_conf failed\n");
+ return -ENOMEM;
+ }
+
+ old_disk_conf = mdev->ldev->disk_conf;
+ *new_disk_conf = *old_disk_conf;
+
+ new_disk_conf->resync_rate = be32_to_cpu(p->resync_rate);
}
if (apv >= 88) {
dev_err(DEV, "verify-alg too long, "
"peer wants %u, accepting only %u byte\n",
data_size, SHARED_SECRET_MAX);
- return -EIO;
+ err = -EIO;
+ goto reconnect;
}
err = drbd_recv_all(mdev->tconn, p->verify_alg, data_size);
if (err)
- return err;
-
+ goto reconnect;
/* we expect NUL terminated string */
/* but just in case someone tries to be evil */
D_ASSERT(p->verify_alg[data_size-1] == 0);
p->csums_alg[SHARED_SECRET_MAX-1] = 0;
}
- if (strcmp(mdev->tconn->net_conf->verify_alg, p->verify_alg)) {
+ if (strcmp(old_net_conf->verify_alg, p->verify_alg)) {
if (mdev->state.conn == C_WF_REPORT_PARAMS) {
dev_err(DEV, "Different verify-alg settings. me=\"%s\" peer=\"%s\"\n",
- mdev->tconn->net_conf->verify_alg, p->verify_alg);
+ old_net_conf->verify_alg, p->verify_alg);
goto disconnect;
}
verify_tfm = drbd_crypto_alloc_digest_safe(mdev,
}
}
- if (apv >= 89 && strcmp(mdev->tconn->net_conf->csums_alg, p->csums_alg)) {
+ if (apv >= 89 && strcmp(old_net_conf->csums_alg, p->csums_alg)) {
if (mdev->state.conn == C_WF_REPORT_PARAMS) {
dev_err(DEV, "Different csums-alg settings. me=\"%s\" peer=\"%s\"\n",
- mdev->tconn->net_conf->csums_alg, p->csums_alg);
+ old_net_conf->csums_alg, p->csums_alg);
goto disconnect;
}
csums_tfm = drbd_crypto_alloc_digest_safe(mdev,
}
}
- if (apv > 94 && get_ldev(mdev)) {
- mdev->ldev->dc.resync_rate = be32_to_cpu(p->rate);
- mdev->ldev->dc.c_plan_ahead = be32_to_cpu(p->c_plan_ahead);
- mdev->ldev->dc.c_delay_target = be32_to_cpu(p->c_delay_target);
- mdev->ldev->dc.c_fill_target = be32_to_cpu(p->c_fill_target);
- mdev->ldev->dc.c_max_rate = be32_to_cpu(p->c_max_rate);
-
- fifo_size = (mdev->ldev->dc.c_plan_ahead * 10 * SLEEP_TIME) / HZ;
- if (fifo_size != mdev->rs_plan_s.size && fifo_size > 0) {
- rs_plan_s = kzalloc(sizeof(int) * fifo_size, GFP_KERNEL);
- if (!rs_plan_s) {
+ if (apv > 94 && new_disk_conf) {
+ new_disk_conf->c_plan_ahead = be32_to_cpu(p->c_plan_ahead);
+ new_disk_conf->c_delay_target = be32_to_cpu(p->c_delay_target);
+ new_disk_conf->c_fill_target = be32_to_cpu(p->c_fill_target);
+ new_disk_conf->c_max_rate = be32_to_cpu(p->c_max_rate);
+
+ fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ;
+ if (fifo_size != mdev->rs_plan_s->size) {
+ new_plan = fifo_alloc(fifo_size);
+ if (!new_plan) {
dev_err(DEV, "kmalloc of fifo_buffer failed");
put_ldev(mdev);
goto disconnect;
}
}
- put_ldev(mdev);
}
- spin_lock(&mdev->peer_seq_lock);
- /* lock against drbd_nl_syncer_conf() */
- if (verify_tfm) {
- strcpy(mdev->tconn->net_conf->verify_alg, p->verify_alg);
- mdev->tconn->net_conf->verify_alg_len = strlen(p->verify_alg) + 1;
- crypto_free_hash(mdev->tconn->verify_tfm);
- mdev->tconn->verify_tfm = verify_tfm;
- dev_info(DEV, "using verify-alg: \"%s\"\n", p->verify_alg);
- }
- if (csums_tfm) {
- strcpy(mdev->tconn->net_conf->csums_alg, p->csums_alg);
- mdev->tconn->net_conf->csums_alg_len = strlen(p->csums_alg) + 1;
- crypto_free_hash(mdev->tconn->csums_tfm);
- mdev->tconn->csums_tfm = csums_tfm;
- dev_info(DEV, "using csums-alg: \"%s\"\n", p->csums_alg);
- }
- if (fifo_size != mdev->rs_plan_s.size) {
- kfree(mdev->rs_plan_s.values);
- mdev->rs_plan_s.values = rs_plan_s;
- mdev->rs_plan_s.size = fifo_size;
- mdev->rs_planed = 0;
+ if (verify_tfm || csums_tfm) {
+ new_net_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL);
+ if (!new_net_conf) {
+ dev_err(DEV, "Allocation of new net_conf failed\n");
+ goto disconnect;
+ }
+
+ *new_net_conf = *old_net_conf;
+
+ if (verify_tfm) {
+ strcpy(new_net_conf->verify_alg, p->verify_alg);
+ new_net_conf->verify_alg_len = strlen(p->verify_alg) + 1;
+ crypto_free_hash(mdev->tconn->verify_tfm);
+ mdev->tconn->verify_tfm = verify_tfm;
+ dev_info(DEV, "using verify-alg: \"%s\"\n", p->verify_alg);
+ }
+ if (csums_tfm) {
+ strcpy(new_net_conf->csums_alg, p->csums_alg);
+ new_net_conf->csums_alg_len = strlen(p->csums_alg) + 1;
+ crypto_free_hash(mdev->tconn->csums_tfm);
+ mdev->tconn->csums_tfm = csums_tfm;
+ dev_info(DEV, "using csums-alg: \"%s\"\n", p->csums_alg);
+ }
+ rcu_assign_pointer(tconn->net_conf, new_net_conf);
}
- spin_unlock(&mdev->peer_seq_lock);
}
+
+ if (new_disk_conf) {
+ rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf);
+ put_ldev(mdev);
+ }
+
+ if (new_plan) {
+ old_plan = mdev->rs_plan_s;
+ rcu_assign_pointer(mdev->rs_plan_s, new_plan);
+ }
+
+ mutex_unlock(&mdev->tconn->conf_update);
+ synchronize_rcu();
+ if (new_net_conf)
+ kfree(old_net_conf);
+ kfree(old_disk_conf);
+ kfree(old_plan);
+
return 0;
+reconnect:
+ if (new_disk_conf) {
+ put_ldev(mdev);
+ kfree(new_disk_conf);
+ }
+ mutex_unlock(&mdev->tconn->conf_update);
+ return -EIO;
+
disconnect:
+ kfree(new_plan);
+ if (new_disk_conf) {
+ put_ldev(mdev);
+ kfree(new_disk_conf);
+ }
+ mutex_unlock(&mdev->tconn->conf_update);
/* just for completeness: actually not needed,
* as this is not reached if csums_tfm was ok. */
crypto_free_hash(csums_tfm);
static int receive_sizes(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_sizes *p = tconn->data.rbuf;
+ struct p_sizes *p = pi->data;
enum determine_dev_size dd = unchanged;
sector_t p_size, p_usize, my_usize;
int ldsc = 0; /* local disk size changed */
mdev->p_size = p_size;
if (get_ldev(mdev)) {
+ rcu_read_lock();
+ my_usize = rcu_dereference(mdev->ldev->disk_conf)->disk_size;
+ rcu_read_unlock();
+
warn_if_differ_considerably(mdev, "lower level device sizes",
p_size, drbd_get_max_capacity(mdev->ldev));
warn_if_differ_considerably(mdev, "user requested size",
- p_usize, mdev->ldev->dc.disk_size);
+ p_usize, my_usize);
/* if this is the first connect, or an otherwise expected
* param exchange, choose the minimum */
if (mdev->state.conn == C_WF_REPORT_PARAMS)
- p_usize = min_not_zero((sector_t)mdev->ldev->dc.disk_size,
- p_usize);
-
- my_usize = mdev->ldev->dc.disk_size;
-
- if (mdev->ldev->dc.disk_size != p_usize) {
- mdev->ldev->dc.disk_size = p_usize;
- dev_info(DEV, "Peer sets u_size to %lu sectors\n",
- (unsigned long)mdev->ldev->dc.disk_size);
- }
+ p_usize = min_not_zero(my_usize, p_usize);
/* Never shrink a device with usable data during connect.
But allow online shrinking if we are connected. */
- if (drbd_new_dev_size(mdev, mdev->ldev, 0) <
- drbd_get_capacity(mdev->this_bdev) &&
- mdev->state.disk >= D_OUTDATED &&
- mdev->state.conn < C_CONNECTED) {
+ if (drbd_new_dev_size(mdev, mdev->ldev, p_usize, 0) <
+ drbd_get_capacity(mdev->this_bdev) &&
+ mdev->state.disk >= D_OUTDATED &&
+ mdev->state.conn < C_CONNECTED) {
dev_err(DEV, "The peer's disk size is too small!\n");
conn_request_state(mdev->tconn, NS(conn, C_DISCONNECTING), CS_HARD);
- mdev->ldev->dc.disk_size = my_usize;
put_ldev(mdev);
return -EIO;
}
+
+ if (my_usize != p_usize) {
+ struct disk_conf *old_disk_conf, *new_disk_conf = NULL;
+
+ new_disk_conf = kzalloc(sizeof(struct disk_conf), GFP_KERNEL);
+ if (!new_disk_conf) {
+ dev_err(DEV, "Allocation of new disk_conf failed\n");
+ put_ldev(mdev);
+ return -ENOMEM;
+ }
+
+ mutex_lock(&mdev->tconn->conf_update);
+ old_disk_conf = mdev->ldev->disk_conf;
+ *new_disk_conf = *old_disk_conf;
+ new_disk_conf->disk_size = p_usize;
+
+ rcu_assign_pointer(mdev->ldev->disk_conf, new_disk_conf);
+ mutex_unlock(&mdev->tconn->conf_update);
+ synchronize_rcu();
+ kfree(old_disk_conf);
+
+ dev_info(DEV, "Peer sets u_size to %lu sectors\n",
+ (unsigned long)my_usize);
+ }
+
put_ldev(mdev);
}
static int receive_uuids(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_uuids *p = tconn->data.rbuf;
+ struct p_uuids *p = pi->data;
u64 *p_uuid;
int i, updated_uuids = 0;
union drbd_state ms;
static enum drbd_conns c_tab[] = {
+ [C_WF_REPORT_PARAMS] = C_WF_REPORT_PARAMS,
[C_CONNECTED] = C_CONNECTED,
[C_STARTING_SYNC_S] = C_STARTING_SYNC_T,
static int receive_req_state(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_req_state *p = tconn->data.rbuf;
+ struct p_req_state *p = pi->data;
union drbd_state mask, val;
enum drbd_state_rv rv;
static int receive_req_conn_state(struct drbd_tconn *tconn, struct packet_info *pi)
{
- struct p_req_state *p = tconn->data.rbuf;
+ struct p_req_state *p = pi->data;
union drbd_state mask, val;
enum drbd_state_rv rv;
static int receive_state(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_state *p = tconn->data.rbuf;
+ struct p_state *p = pi->data;
union drbd_state os, ns, peer_state;
enum drbd_disk_state real_peer_disk;
enum chg_state_flags cs_flags;
spin_lock_irq(&mdev->tconn->req_lock);
retry:
- os = ns = mdev->state;
+ os = ns = drbd_read_state(mdev);
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. */
- if (os.pdsk == D_INCONSISTENT && real_peer_disk == D_UP_TO_DATE &&
+ /* If some other part of the code (asender thread, timeout)
+ * already decided to close the connection again,
+ * we must not "re-establish" it here. */
+ if (os.conn <= C_TEAR_DOWN)
+ return false;
+
+ /* If this is the "end of sync" confirmation, usually the peer disk
+ * transitions from D_INCONSISTENT to D_UP_TO_DATE. For empty (0 bits
+ * set) resync started in PausedSyncT, or if the timing of pause-/
+ * unpause-sync events has been "just right", the peer disk may
+ * transition from D_CONSISTENT to D_UP_TO_DATE as well.
+ */
+ if ((os.pdsk == D_INCONSISTENT || os.pdsk == D_CONSISTENT) &&
+ real_peer_disk == D_UP_TO_DATE &&
os.conn > C_CONNECTED && os.disk == D_UP_TO_DATE) {
/* If we are (becoming) SyncSource, but peer is still in sync
* preparation, ignore its uptodate-ness to avoid flapping, it
}
spin_lock_irq(&mdev->tconn->req_lock);
- if (mdev->state.i != os.i)
+ if (os.i != drbd_read_state(mdev).i)
goto retry;
clear_bit(CONSIDER_RESYNC, &mdev->flags);
ns.peer = peer_state.role;
if ((ns.conn == C_CONNECTED || ns.conn == C_WF_BITMAP_S) && ns.disk == D_NEGOTIATING)
ns.disk = mdev->new_state_tmp.disk;
cs_flags = CS_VERBOSE + (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED ? 0 : CS_HARD);
- if (ns.pdsk == D_CONSISTENT && is_susp(ns) && ns.conn == C_CONNECTED && os.conn < C_CONNECTED &&
+ if (ns.pdsk == D_CONSISTENT && drbd_suspended(mdev) && ns.conn == C_CONNECTED && os.conn < C_CONNECTED &&
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! */
return -EIO;
}
rv = _drbd_set_state(mdev, ns, cs_flags, NULL);
- ns = mdev->state;
+ ns = drbd_read_state(mdev);
spin_unlock_irq(&mdev->tconn->req_lock);
if (rv < SS_SUCCESS) {
/* Nowadays only used when forcing a node into primary role and
setting its disk to UpToDate with that */
drbd_send_uuids(mdev);
- drbd_send_state(mdev);
+ drbd_send_current_state(mdev);
}
}
- mdev->tconn->net_conf->want_lose = 0;
+ clear_bit(DISCARD_MY_DATA, &mdev->flags);
drbd_md_sync(mdev); /* update connected indicator, la_size, ... */
static int receive_sync_uuid(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_rs_uuid *p = tconn->data.rbuf;
+ struct p_rs_uuid *p = pi->data;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
* code upon failure.
*/
static int
-receive_bitmap_plain(struct drbd_conf *mdev, unsigned int data_size,
- struct p_header *h, struct bm_xfer_ctx *c)
+receive_bitmap_plain(struct drbd_conf *mdev, unsigned int size,
+ unsigned long *p, struct bm_xfer_ctx *c)
{
- unsigned long *buffer = (unsigned long *)h->payload;
- unsigned num_words = min_t(size_t, BM_PACKET_WORDS, c->bm_words - c->word_offset);
- unsigned want = num_words * sizeof(long);
+ unsigned int data_size = DRBD_SOCKET_BUFFER_SIZE -
+ drbd_header_size(mdev->tconn);
+ unsigned int num_words = min_t(size_t, data_size / sizeof(*p),
+ c->bm_words - c->word_offset);
+ unsigned int want = num_words * sizeof(*p);
int err;
- if (want != data_size) {
- dev_err(DEV, "%s:want (%u) != data_size (%u)\n", __func__, want, data_size);
+ if (want != size) {
+ dev_err(DEV, "%s:want (%u) != size (%u)\n", __func__, want, size);
return -EIO;
}
if (want == 0)
return 0;
- err = drbd_recv_all(mdev->tconn, buffer, want);
+ err = drbd_recv_all(mdev->tconn, p, want);
if (err)
return err;
- drbd_bm_merge_lel(mdev, c->word_offset, num_words, buffer);
+ drbd_bm_merge_lel(mdev, c->word_offset, num_words, p);
c->word_offset += num_words;
c->bit_offset = c->word_offset * BITS_PER_LONG;
unsigned int len)
{
if (dcbp_get_code(p) == RLE_VLI_Bits)
- return recv_bm_rle_bits(mdev, p, c, len);
+ return recv_bm_rle_bits(mdev, p, c, len - sizeof(*p));
/* other variants had been implemented for evaluation,
* but have been dropped as this one turned out to be "best"
const char *direction, struct bm_xfer_ctx *c)
{
/* what would it take to transfer it "plaintext" */
- unsigned plain = sizeof(struct p_header) *
- ((c->bm_words+BM_PACKET_WORDS-1)/BM_PACKET_WORDS+1)
- + c->bm_words * sizeof(long);
- unsigned total = c->bytes[0] + c->bytes[1];
- unsigned r;
+ unsigned int header_size = drbd_header_size(mdev->tconn);
+ unsigned int data_size = DRBD_SOCKET_BUFFER_SIZE - header_size;
+ unsigned int plain =
+ header_size * (DIV_ROUND_UP(c->bm_words, data_size) + 1) +
+ c->bm_words * sizeof(unsigned long);
+ unsigned int total = c->bytes[0] + c->bytes[1];
+ unsigned int r;
/* total can not be zero. but just in case: */
if (total == 0)
struct drbd_conf *mdev;
struct bm_xfer_ctx c;
int err;
- struct p_header *h = tconn->data.rbuf;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
};
for(;;) {
- if (pi->cmd == P_BITMAP) {
- err = receive_bitmap_plain(mdev, pi->size, h, &c);
- } else if (pi->cmd == P_COMPRESSED_BITMAP) {
+ if (pi->cmd == P_BITMAP)
+ err = receive_bitmap_plain(mdev, pi->size, pi->data, &c);
+ else if (pi->cmd == P_COMPRESSED_BITMAP) {
/* MAYBE: sanity check that we speak proto >= 90,
* and the feature is enabled! */
- struct p_compressed_bm *p;
+ struct p_compressed_bm *p = pi->data;
- if (pi->size > BM_PACKET_PAYLOAD_BYTES) {
+ if (pi->size > DRBD_SOCKET_BUFFER_SIZE - drbd_header_size(tconn)) {
dev_err(DEV, "ReportCBitmap packet too large\n");
err = -EIO;
goto out;
}
-
- p = mdev->tconn->data.rbuf;
- err = drbd_recv_all(mdev->tconn, p->head.payload, pi->size);
- if (err)
- goto out;
- if (pi->size <= (sizeof(*p) - sizeof(p->head))) {
+ if (pi->size <= sizeof(*p)) {
dev_err(DEV, "ReportCBitmap packet too small (l:%u)\n", pi->size);
err = -EIO;
goto out;
}
+ err = drbd_recv_all(mdev->tconn, p, pi->size);
+ if (err)
+ goto out;
err = decode_bitmap_c(mdev, p, &c, pi->size);
} else {
dev_warn(DEV, "receive_bitmap: cmd neither ReportBitMap nor ReportCBitMap (is 0x%x)", pi->cmd);
}
c.packets[pi->cmd == P_BITMAP]++;
- c.bytes[pi->cmd == P_BITMAP] += sizeof(struct p_header) + pi->size;
+ c.bytes[pi->cmd == P_BITMAP] += drbd_header_size(tconn) + pi->size;
if (err <= 0) {
if (err < 0)
static int receive_out_of_sync(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_block_desc *p = tconn->data.rbuf;
+ struct p_block_desc *p = pi->data;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
[P_DATA_REPLY] = { 1, sizeof(struct p_data), receive_DataReply },
[P_RS_DATA_REPLY] = { 1, sizeof(struct p_data), receive_RSDataReply } ,
[P_BARRIER] = { 0, sizeof(struct p_barrier), receive_Barrier } ,
- [P_BITMAP] = { 1, sizeof(struct p_header), receive_bitmap } ,
- [P_COMPRESSED_BITMAP] = { 1, sizeof(struct p_header), receive_bitmap } ,
- [P_UNPLUG_REMOTE] = { 0, sizeof(struct p_header), receive_UnplugRemote },
+ [P_BITMAP] = { 1, 0, receive_bitmap } ,
+ [P_COMPRESSED_BITMAP] = { 1, 0, receive_bitmap } ,
+ [P_UNPLUG_REMOTE] = { 0, 0, receive_UnplugRemote },
[P_DATA_REQUEST] = { 0, sizeof(struct p_block_req), receive_DataRequest },
[P_RS_DATA_REQUEST] = { 0, sizeof(struct p_block_req), receive_DataRequest },
- [P_SYNC_PARAM] = { 1, sizeof(struct p_header), receive_SyncParam },
- [P_SYNC_PARAM89] = { 1, sizeof(struct p_header), receive_SyncParam },
+ [P_SYNC_PARAM] = { 1, 0, receive_SyncParam },
+ [P_SYNC_PARAM89] = { 1, 0, receive_SyncParam },
[P_PROTOCOL] = { 1, sizeof(struct p_protocol), receive_protocol },
[P_UUIDS] = { 0, sizeof(struct p_uuids), receive_uuids },
[P_SIZES] = { 0, sizeof(struct p_sizes), receive_sizes },
[P_DELAY_PROBE] = { 0, sizeof(struct p_delay_probe93), receive_skip },
[P_OUT_OF_SYNC] = { 0, sizeof(struct p_block_desc), receive_out_of_sync },
[P_CONN_ST_CHG_REQ] = { 0, sizeof(struct p_req_state), receive_req_conn_state },
+ [P_PROTOCOL_UPDATE] = { 1, sizeof(struct p_protocol), receive_protocol },
};
static void drbdd(struct drbd_tconn *tconn)
{
- struct p_header *header = tconn->data.rbuf;
struct packet_info pi;
size_t shs; /* sub header size */
int err;
cmd = &drbd_cmd_handler[pi.cmd];
if (unlikely(pi.cmd >= ARRAY_SIZE(drbd_cmd_handler) || !cmd->fn)) {
- conn_err(tconn, "unknown packet type %d, l: %d!\n", pi.cmd, pi.size);
+ conn_err(tconn, "Unexpected data packet %s (0x%04x)",
+ cmdname(pi.cmd), pi.cmd);
goto err_out;
}
- shs = cmd->pkt_size - sizeof(struct p_header);
- if (pi.size - shs > 0 && !cmd->expect_payload) {
- conn_err(tconn, "No payload expected %s l:%d\n", cmdname(pi.cmd), pi.size);
+ shs = cmd->pkt_size;
+ if (pi.size > shs && !cmd->expect_payload) {
+ conn_err(tconn, "No payload expected %s l:%d\n",
+ cmdname(pi.cmd), pi.size);
goto err_out;
}
if (shs) {
- err = drbd_recv_all_warn(tconn, &header->payload, shs);
+ err = drbd_recv_all_warn(tconn, pi.data, shs);
if (err)
goto err_out;
pi.size -= shs;
err = cmd->fn(tconn, &pi);
if (err) {
- conn_err(tconn, "error receiving %s, l: %d!\n",
- cmdname(pi.cmd), pi.size);
+ conn_err(tconn, "error receiving %s, e: %d l: %d!\n",
+ cmdname(pi.cmd), err, pi.size);
goto err_out;
}
}
wait_for_completion(&barr.done);
}
-static void drbd_disconnect(struct drbd_tconn *tconn)
+static void conn_disconnect(struct drbd_tconn *tconn)
{
+ struct drbd_conf *mdev;
enum drbd_conns oc;
- int rv = SS_UNKNOWN_ERROR;
+ int vnr;
if (tconn->cstate == C_STANDALONE)
return;
+ /* We are about to start the cleanup after connection loss.
+ * Make sure drbd_make_request knows about that.
+ * Usually we should be in some network failure state already,
+ * but just in case we are not, we fix it up here.
+ */
+ conn_request_state(tconn, NS(conn, C_NETWORK_FAILURE), CS_HARD);
+
/* asender does not clean up anything. it must not interfere, either */
drbd_thread_stop(&tconn->asender);
drbd_free_sock(tconn);
- idr_for_each(&tconn->volumes, drbd_disconnected, tconn);
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ kref_get(&mdev->kref);
+ rcu_read_unlock();
+ drbd_disconnected(mdev);
+ kref_put(&mdev->kref, &drbd_minor_destroy);
+ rcu_read_lock();
+ }
+ rcu_read_unlock();
+
+ if (!list_empty(&tconn->current_epoch->list))
+ conn_err(tconn, "ASSERTION FAILED: tconn->current_epoch->list not empty\n");
+ /* ok, no more ee's on the fly, it is safe to reset the epoch_size */
+ atomic_set(&tconn->current_epoch->epoch_size, 0);
+
conn_info(tconn, "Connection closed\n");
if (conn_highest_role(tconn) == R_PRIMARY && conn_highest_pdsk(tconn) >= D_UNKNOWN)
spin_lock_irq(&tconn->req_lock);
oc = tconn->cstate;
if (oc >= C_UNCONNECTED)
- rv = _conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE);
+ _conn_request_state(tconn, NS(conn, C_UNCONNECTED), CS_VERBOSE);
spin_unlock_irq(&tconn->req_lock);
- if (oc == C_DISCONNECTING) {
- wait_event(tconn->net_cnt_wait, atomic_read(&tconn->net_cnt) == 0);
-
- crypto_free_hash(tconn->cram_hmac_tfm);
- tconn->cram_hmac_tfm = NULL;
-
- kfree(tconn->net_conf);
- tconn->net_conf = NULL;
- conn_request_state(tconn, NS(conn, C_STANDALONE), CS_VERBOSE);
- }
+ if (oc == C_DISCONNECTING)
+ conn_request_state(tconn, NS(conn, C_STANDALONE), CS_VERBOSE | CS_HARD);
}
-static int drbd_disconnected(int vnr, void *p, void *data)
+static int drbd_disconnected(struct drbd_conf *mdev)
{
- struct drbd_conf *mdev = (struct drbd_conf *)p;
- enum drbd_fencing_p fp;
unsigned int i;
/* wait for current activity to cease. */
atomic_set(&mdev->rs_pending_cnt, 0);
wake_up(&mdev->misc_wait);
- del_timer(&mdev->request_timer);
-
del_timer_sync(&mdev->resync_timer);
resync_timer_fn((unsigned long)mdev);
* to be "canceled" */
drbd_flush_workqueue(mdev);
- /* This also does reclaim_net_ee(). If we do this too early, we might
- * miss some resync ee and pages.*/
- drbd_process_done_ee(mdev);
+ drbd_finish_peer_reqs(mdev);
+
+ /* This second workqueue flush is necessary, since drbd_finish_peer_reqs()
+ might have issued a work again. The one before drbd_finish_peer_reqs() is
+ necessary to reclain net_ee in drbd_finish_peer_reqs(). */
+ drbd_flush_workqueue(mdev);
kfree(mdev->p_uuid);
mdev->p_uuid = NULL;
- if (!is_susp(mdev->state))
+ if (!drbd_suspended(mdev))
tl_clear(mdev->tconn);
drbd_md_sync(mdev);
- fp = FP_DONT_CARE;
- if (get_ldev(mdev)) {
- fp = mdev->ldev->dc.fencing;
- put_ldev(mdev);
- }
-
/* serialize with bitmap writeout triggered by the state change,
* if any. */
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
* Actually we don't care for exactly when the network stack does its
* put_page(), but release our reference on these pages right here.
*/
- i = drbd_release_ee(mdev, &mdev->net_ee);
+ i = drbd_free_peer_reqs(mdev, &mdev->net_ee);
if (i)
dev_info(DEV, "net_ee not empty, killed %u entries\n", i);
i = atomic_read(&mdev->pp_in_use_by_net);
D_ASSERT(list_empty(&mdev->sync_ee));
D_ASSERT(list_empty(&mdev->done_ee));
- /* ok, no more ee's on the fly, it is safe to reset the epoch_size */
- atomic_set(&mdev->current_epoch->epoch_size, 0);
- D_ASSERT(list_empty(&mdev->current_epoch->list));
-
return 0;
}
*
* for now, they are expected to be zero, but ignored.
*/
-static int drbd_send_handshake(struct drbd_tconn *tconn)
+static int drbd_send_features(struct drbd_tconn *tconn)
{
- /* ASSERT current == mdev->tconn->receiver ... */
- struct p_handshake *p = tconn->data.sbuf;
- int err;
+ struct drbd_socket *sock;
+ struct p_connection_features *p;
- if (mutex_lock_interruptible(&tconn->data.mutex)) {
- conn_err(tconn, "interrupted during initial handshake\n");
- return -EINTR;
- }
-
- if (tconn->data.socket == NULL) {
- mutex_unlock(&tconn->data.mutex);
+ sock = &tconn->data;
+ p = conn_prepare_command(tconn, sock);
+ if (!p)
return -EIO;
- }
-
memset(p, 0, sizeof(*p));
p->protocol_min = cpu_to_be32(PRO_VERSION_MIN);
p->protocol_max = cpu_to_be32(PRO_VERSION_MAX);
- err = _conn_send_cmd(tconn, 0, &tconn->data, P_HAND_SHAKE,
- &p->head, sizeof(*p), 0);
- mutex_unlock(&tconn->data.mutex);
- return err;
+ return conn_send_command(tconn, sock, P_CONNECTION_FEATURES, sizeof(*p), NULL, 0);
}
/*
* -1 peer talks different language,
* no point in trying again, please go standalone.
*/
-static int drbd_do_handshake(struct drbd_tconn *tconn)
+static int drbd_do_features(struct drbd_tconn *tconn)
{
/* ASSERT current == tconn->receiver ... */
- struct p_handshake *p = tconn->data.rbuf;
- const int expect = sizeof(struct p_handshake) - sizeof(struct p_header80);
+ struct p_connection_features *p;
+ const int expect = sizeof(struct p_connection_features);
struct packet_info pi;
int err;
- err = drbd_send_handshake(tconn);
+ err = drbd_send_features(tconn);
if (err)
return 0;
if (err)
return 0;
- if (pi.cmd != P_HAND_SHAKE) {
- conn_err(tconn, "expected HandShake packet, received: %s (0x%04x)\n",
- cmdname(pi.cmd), pi.cmd);
+ if (pi.cmd != P_CONNECTION_FEATURES) {
+ conn_err(tconn, "expected ConnectionFeatures packet, received: %s (0x%04x)\n",
+ cmdname(pi.cmd), pi.cmd);
return -1;
}
if (pi.size != expect) {
- conn_err(tconn, "expected HandShake length: %u, received: %u\n",
+ conn_err(tconn, "expected ConnectionFeatures length: %u, received: %u\n",
expect, pi.size);
return -1;
}
- err = drbd_recv_all_warn(tconn, &p->head.payload, expect);
+ p = pi.data;
+ err = drbd_recv_all_warn(tconn, p, expect);
if (err)
return 0;
static int drbd_do_auth(struct drbd_tconn *tconn)
{
+ struct drbd_socket *sock;
char my_challenge[CHALLENGE_LEN]; /* 64 Bytes... */
struct scatterlist sg;
char *response = NULL;
char *right_response = NULL;
char *peers_ch = NULL;
- unsigned int key_len = strlen(tconn->net_conf->shared_secret);
+ unsigned int key_len;
+ char secret[SHARED_SECRET_MAX]; /* 64 byte */
unsigned int resp_size;
struct hash_desc desc;
struct packet_info pi;
+ struct net_conf *nc;
int err, rv;
+ /* FIXME: Put the challenge/response into the preallocated socket buffer. */
+
+ rcu_read_lock();
+ nc = rcu_dereference(tconn->net_conf);
+ key_len = strlen(nc->shared_secret);
+ memcpy(secret, nc->shared_secret, key_len);
+ rcu_read_unlock();
+
desc.tfm = tconn->cram_hmac_tfm;
desc.flags = 0;
- rv = crypto_hash_setkey(tconn->cram_hmac_tfm,
- (u8 *)tconn->net_conf->shared_secret, key_len);
+ rv = crypto_hash_setkey(tconn->cram_hmac_tfm, (u8 *)secret, key_len);
if (rv) {
conn_err(tconn, "crypto_hash_setkey() failed with %d\n", rv);
rv = -1;
get_random_bytes(my_challenge, CHALLENGE_LEN);
- rv = !conn_send_cmd2(tconn, P_AUTH_CHALLENGE, my_challenge, CHALLENGE_LEN);
+ sock = &tconn->data;
+ if (!conn_prepare_command(tconn, sock)) {
+ rv = 0;
+ goto fail;
+ }
+ rv = !conn_send_command(tconn, sock, P_AUTH_CHALLENGE, 0,
+ my_challenge, CHALLENGE_LEN);
if (!rv)
goto fail;
if (pi.cmd != P_AUTH_CHALLENGE) {
conn_err(tconn, "expected AuthChallenge packet, received: %s (0x%04x)\n",
- cmdname(pi.cmd), pi.cmd);
+ cmdname(pi.cmd), pi.cmd);
rv = 0;
goto fail;
}
goto fail;
}
- rv = !conn_send_cmd2(tconn, P_AUTH_RESPONSE, response, resp_size);
+ if (!conn_prepare_command(tconn, sock)) {
+ rv = 0;
+ goto fail;
+ }
+ rv = !conn_send_command(tconn, sock, P_AUTH_RESPONSE, 0,
+ response, resp_size);
if (!rv)
goto fail;
if (pi.cmd != P_AUTH_RESPONSE) {
conn_err(tconn, "expected AuthResponse packet, received: %s (0x%04x)\n",
- cmdname(pi.cmd), pi.cmd);
+ cmdname(pi.cmd), pi.cmd);
rv = 0;
goto fail;
}
rv = !memcmp(response, right_response, resp_size);
if (rv)
- conn_info(tconn, "Peer authenticated using %d bytes of '%s' HMAC\n",
- resp_size, tconn->net_conf->cram_hmac_alg);
+ conn_info(tconn, "Peer authenticated using %d bytes HMAC\n",
+ resp_size);
else
rv = -1;
conn_info(tconn, "receiver (re)started\n");
do {
- h = drbd_connect(tconn);
+ h = conn_connect(tconn);
if (h == 0) {
- drbd_disconnect(tconn);
+ conn_disconnect(tconn);
schedule_timeout_interruptible(HZ);
}
if (h == -1) {
}
} while (h == 0);
- if (h > 0) {
- if (get_net_conf(tconn)) {
- drbdd(tconn);
- put_net_conf(tconn);
- }
- }
+ if (h > 0)
+ drbdd(tconn);
- drbd_disconnect(tconn);
+ conn_disconnect(tconn);
conn_info(tconn, "receiver terminated\n");
return 0;
static int got_conn_RqSReply(struct drbd_tconn *tconn, struct packet_info *pi)
{
- struct p_req_state_reply *p = tconn->meta.rbuf;
+ struct p_req_state_reply *p = pi->data;
int retcode = be32_to_cpu(p->retcode);
if (retcode >= SS_SUCCESS) {
}
wake_up(&tconn->ping_wait);
- return true;
+ return 0;
}
static int got_RqSReply(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_req_state_reply *p = tconn->meta.rbuf;
+ struct p_req_state_reply *p = pi->data;
int retcode = be32_to_cpu(p->retcode);
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
- return false;
+ return -EIO;
+
+ if (test_bit(CONN_WD_ST_CHG_REQ, &tconn->flags)) {
+ D_ASSERT(tconn->agreed_pro_version < 100);
+ return got_conn_RqSReply(tconn, pi);
+ }
if (retcode >= SS_SUCCESS) {
set_bit(CL_ST_CHG_SUCCESS, &mdev->flags);
}
wake_up(&mdev->state_wait);
- return true;
+ return 0;
}
static int got_Ping(struct drbd_tconn *tconn, struct packet_info *pi)
if (!test_and_set_bit(GOT_PING_ACK, &tconn->flags))
wake_up(&tconn->ping_wait);
- return true;
+ return 0;
}
static int got_IsInSync(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_block_ack *p = tconn->meta.rbuf;
+ struct p_block_ack *p = pi->data;
sector_t sector = be64_to_cpu(p->sector);
int blksize = be32_to_cpu(p->blksize);
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
- return false;
+ return -EIO;
D_ASSERT(mdev->tconn->agreed_pro_version >= 89);
dec_rs_pending(mdev);
atomic_add(blksize >> 9, &mdev->rs_sect_in);
- return true;
+ return 0;
}
static int
req = find_request(mdev, root, id, sector, missing_ok, func);
if (unlikely(!req)) {
spin_unlock_irq(&mdev->tconn->req_lock);
- return false;
+ return -EIO;
}
__req_mod(req, what, &m);
spin_unlock_irq(&mdev->tconn->req_lock);
if (m.bio)
complete_master_bio(mdev, &m);
- return true;
+ return 0;
}
static int got_BlockAck(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_block_ack *p = tconn->meta.rbuf;
+ struct p_block_ack *p = pi->data;
sector_t sector = be64_to_cpu(p->sector);
int blksize = be32_to_cpu(p->blksize);
enum drbd_req_event what;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
- return false;
+ return -EIO;
update_peer_seq(mdev, be32_to_cpu(p->seq_num));
if (p->block_id == ID_SYNCER) {
drbd_set_in_sync(mdev, sector, blksize);
dec_rs_pending(mdev);
- return true;
+ return 0;
}
switch (pi->cmd) {
case P_RS_WRITE_ACK:
- D_ASSERT(mdev->tconn->net_conf->wire_protocol == DRBD_PROT_C);
what = WRITE_ACKED_BY_PEER_AND_SIS;
break;
case P_WRITE_ACK:
- D_ASSERT(mdev->tconn->net_conf->wire_protocol == DRBD_PROT_C);
what = WRITE_ACKED_BY_PEER;
break;
case P_RECV_ACK:
- D_ASSERT(mdev->tconn->net_conf->wire_protocol == DRBD_PROT_B);
what = RECV_ACKED_BY_PEER;
break;
case P_DISCARD_WRITE:
- D_ASSERT(mdev->tconn->net_conf->wire_protocol == DRBD_PROT_C);
what = DISCARD_WRITE;
break;
case P_RETRY_WRITE:
- D_ASSERT(mdev->tconn->net_conf->wire_protocol == DRBD_PROT_C);
what = POSTPONE_WRITE;
break;
default:
- D_ASSERT(0);
- return false;
+ BUG();
}
return validate_req_change_req_state(mdev, p->block_id, sector,
static int got_NegAck(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_block_ack *p = tconn->meta.rbuf;
+ struct p_block_ack *p = pi->data;
sector_t sector = be64_to_cpu(p->sector);
int size = be32_to_cpu(p->blksize);
- bool missing_ok = tconn->net_conf->wire_protocol == DRBD_PROT_A ||
- tconn->net_conf->wire_protocol == DRBD_PROT_B;
- bool found;
+ int err;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
- return false;
+ return -EIO;
update_peer_seq(mdev, be32_to_cpu(p->seq_num));
if (p->block_id == ID_SYNCER) {
dec_rs_pending(mdev);
drbd_rs_failed_io(mdev, sector, size);
- return true;
+ return 0;
}
- found = validate_req_change_req_state(mdev, p->block_id, sector,
- &mdev->write_requests, __func__,
- NEG_ACKED, missing_ok);
- if (!found) {
+ err = validate_req_change_req_state(mdev, p->block_id, sector,
+ &mdev->write_requests, __func__,
+ NEG_ACKED, true);
+ if (err) {
/* Protocol A has no P_WRITE_ACKs, but has P_NEG_ACKs.
The master bio might already be completed, therefore the
request is no longer in the collision hash. */
/* In Protocol B we might already have got a P_RECV_ACK
but then get a P_NEG_ACK afterwards. */
- if (!missing_ok)
- return false;
drbd_set_out_of_sync(mdev, sector, size);
}
- return true;
+ return 0;
}
static int got_NegDReply(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_block_ack *p = tconn->meta.rbuf;
+ struct p_block_ack *p = pi->data;
sector_t sector = be64_to_cpu(p->sector);
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
- return false;
+ return -EIO;
update_peer_seq(mdev, be32_to_cpu(p->seq_num));
- dev_err(DEV, "Got NegDReply; Sector %llus, len %u; Fail original request.\n",
+ dev_err(DEV, "Got NegDReply; Sector %llus, len %u.\n",
(unsigned long long)sector, be32_to_cpu(p->blksize));
return validate_req_change_req_state(mdev, p->block_id, sector,
struct drbd_conf *mdev;
sector_t sector;
int size;
- struct p_block_ack *p = tconn->meta.rbuf;
+ struct p_block_ack *p = pi->data;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
- return false;
+ return -EIO;
sector = be64_to_cpu(p->sector);
size = be32_to_cpu(p->blksize);
case P_RS_CANCEL:
break;
default:
- D_ASSERT(0);
- put_ldev(mdev);
- return false;
+ BUG();
}
put_ldev(mdev);
}
- return true;
+ return 0;
}
static int got_BarrierAck(struct drbd_tconn *tconn, struct packet_info *pi)
{
+ struct p_barrier_ack *p = pi->data;
struct drbd_conf *mdev;
- struct p_barrier_ack *p = tconn->meta.rbuf;
+ int vnr;
- mdev = vnr_to_mdev(tconn, pi->vnr);
- if (!mdev)
- return false;
+ tl_release(tconn, p->barrier, be32_to_cpu(p->set_size));
- tl_release(mdev->tconn, p->barrier, be32_to_cpu(p->set_size));
-
- if (mdev->state.conn == C_AHEAD &&
- atomic_read(&mdev->ap_in_flight) == 0 &&
- !test_and_set_bit(AHEAD_TO_SYNC_SOURCE, &mdev->current_epoch->flags)) {
- mdev->start_resync_timer.expires = jiffies + HZ;
- add_timer(&mdev->start_resync_timer);
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ if (mdev->state.conn == C_AHEAD &&
+ atomic_read(&mdev->ap_in_flight) == 0 &&
+ !test_and_set_bit(AHEAD_TO_SYNC_SOURCE, &mdev->flags)) {
+ mdev->start_resync_timer.expires = jiffies + HZ;
+ add_timer(&mdev->start_resync_timer);
+ }
}
+ rcu_read_unlock();
- return true;
+ return 0;
}
static int got_OVResult(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
- struct p_block_ack *p = tconn->meta.rbuf;
+ struct p_block_ack *p = pi->data;
struct drbd_work *w;
sector_t sector;
int size;
mdev = vnr_to_mdev(tconn, pi->vnr);
if (!mdev)
- return false;
+ return -EIO;
sector = be64_to_cpu(p->sector);
size = be32_to_cpu(p->blksize);
ov_out_of_sync_print(mdev);
if (!get_ldev(mdev))
- return true;
+ return 0;
drbd_rs_complete_io(mdev, sector);
dec_rs_pending(mdev);
}
}
put_ldev(mdev);
- return true;
+ return 0;
}
static int got_skip(struct drbd_tconn *tconn, struct packet_info *pi)
{
- return true;
+ return 0;
}
-static int tconn_process_done_ee(struct drbd_tconn *tconn)
+static int tconn_finish_peer_reqs(struct drbd_tconn *tconn)
{
struct drbd_conf *mdev;
- int i, not_empty = 0;
+ int vnr, not_empty = 0;
do {
clear_bit(SIGNAL_ASENDER, &tconn->flags);
flush_signals(current);
- idr_for_each_entry(&tconn->volumes, mdev, i) {
- if (drbd_process_done_ee(mdev))
- return 1; /* error */
+
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ kref_get(&mdev->kref);
+ rcu_read_unlock();
+ if (drbd_finish_peer_reqs(mdev)) {
+ kref_put(&mdev->kref, &drbd_minor_destroy);
+ return 1;
+ }
+ kref_put(&mdev->kref, &drbd_minor_destroy);
+ rcu_read_lock();
}
set_bit(SIGNAL_ASENDER, &tconn->flags);
spin_lock_irq(&tconn->req_lock);
- idr_for_each_entry(&tconn->volumes, mdev, i) {
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
not_empty = !list_empty(&mdev->done_ee);
if (not_empty)
break;
}
spin_unlock_irq(&tconn->req_lock);
+ rcu_read_unlock();
} while (not_empty);
return 0;
};
static struct asender_cmd asender_tbl[] = {
- [P_PING] = { sizeof(struct p_header), got_Ping },
- [P_PING_ACK] = { sizeof(struct p_header), got_PingAck },
+ [P_PING] = { 0, got_Ping },
+ [P_PING_ACK] = { 0, got_PingAck },
[P_RECV_ACK] = { sizeof(struct p_block_ack), got_BlockAck },
[P_WRITE_ACK] = { sizeof(struct p_block_ack), got_BlockAck },
[P_RS_WRITE_ACK] = { sizeof(struct p_block_ack), got_BlockAck },
int drbd_asender(struct drbd_thread *thi)
{
struct drbd_tconn *tconn = thi->tconn;
- struct p_header *h = tconn->meta.rbuf;
struct asender_cmd *cmd = NULL;
struct packet_info pi;
int rv;
- void *buf = h;
+ void *buf = tconn->meta.rbuf;
int received = 0;
- int expect = sizeof(struct p_header);
- int ping_timeout_active = 0;
+ unsigned int header_size = drbd_header_size(tconn);
+ int expect = header_size;
+ bool ping_timeout_active = false;
+ struct net_conf *nc;
+ int ping_timeo, tcp_cork, ping_int;
current->policy = SCHED_RR; /* Make this a realtime task! */
current->rt_priority = 2; /* more important than all other tasks */
while (get_t_state(thi) == RUNNING) {
drbd_thread_current_set_cpu(thi);
+
+ rcu_read_lock();
+ nc = rcu_dereference(tconn->net_conf);
+ ping_timeo = nc->ping_timeo;
+ tcp_cork = nc->tcp_cork;
+ ping_int = nc->ping_int;
+ rcu_read_unlock();
+
if (test_and_clear_bit(SEND_PING, &tconn->flags)) {
- if (!drbd_send_ping(tconn)) {
+ if (drbd_send_ping(tconn)) {
conn_err(tconn, "drbd_send_ping has failed\n");
goto reconnect;
}
- tconn->meta.socket->sk->sk_rcvtimeo =
- tconn->net_conf->ping_timeo*HZ/10;
- ping_timeout_active = 1;
+ tconn->meta.socket->sk->sk_rcvtimeo = ping_timeo * HZ / 10;
+ ping_timeout_active = true;
}
/* TODO: conditionally cork; it may hurt latency if we cork without
much to send */
- if (!tconn->net_conf->no_cork)
+ if (tcp_cork)
drbd_tcp_cork(tconn->meta.socket);
- if (tconn_process_done_ee(tconn)) {
- conn_err(tconn, "tconn_process_done_ee() failed\n");
+ if (tconn_finish_peer_reqs(tconn)) {
+ conn_err(tconn, "tconn_finish_peer_reqs() failed\n");
goto reconnect;
}
/* but unconditionally uncork unless disabled */
- if (!tconn->net_conf->no_cork)
+ if (tcp_cork)
drbd_tcp_uncork(tconn->meta.socket);
/* short circuit, recv_msg would return EINTR anyways. */
}
if (received == expect && cmd == NULL) {
- if (decode_header(tconn, h, &pi))
+ if (decode_header(tconn, tconn->meta.rbuf, &pi))
goto reconnect;
cmd = &asender_tbl[pi.cmd];
if (pi.cmd >= ARRAY_SIZE(asender_tbl) || !cmd->fn) {
- conn_err(tconn, "unknown command %d on meta (l: %d)\n",
- pi.cmd, pi.size);
+ conn_err(tconn, "Unexpected meta packet %s (0x%04x)\n",
+ cmdname(pi.cmd), pi.cmd);
goto disconnect;
}
- expect = cmd->pkt_size;
- if (pi.size != expect - sizeof(struct p_header)) {
+ expect = header_size + cmd->pkt_size;
+ if (pi.size != expect - header_size) {
conn_err(tconn, "Wrong packet size on meta (c: %d, l: %d)\n",
pi.cmd, pi.size);
goto reconnect;
}
}
if (received == expect) {
- bool rv;
+ bool err;
- rv = cmd->fn(tconn, &pi);
- if (!rv) {
+ err = cmd->fn(tconn, &pi);
+ if (err) {
conn_err(tconn, "%pf failed\n", cmd->fn);
goto reconnect;
}
tconn->last_received = jiffies;
- /* the idle_timeout (ping-int)
- * has been restored in got_PingAck() */
- if (cmd == &asender_tbl[P_PING_ACK])
- ping_timeout_active = 0;
+ if (cmd == &asender_tbl[P_PING_ACK]) {
+ /* restore idle timeout */
+ tconn->meta.socket->sk->sk_rcvtimeo = ping_int * HZ;
+ ping_timeout_active = false;
+ }
- buf = h;
+ buf = tconn->meta.rbuf;
received = 0;
- expect = sizeof(struct p_header);
+ expect = header_size;
cmd = NULL;
}
}
projects / karo-tx-linux.git / blobdiff