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drbd: disambiguation, s/DISCARD_CONCURRENT/RESOLVE_CONFLICTS/ 

We don't discard anything here, really.
We resolve conflicting, concurrent writes to overlapping data blocks.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Lars Ellenberg 2012-08-01 12:43:01 +02:00 коммит произвёл Philipp Reisner
Родитель d4dabbe22d
Коммит 427c0434fc
3 изменённых файлов: 12 добавлений и 12 удалений
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2
drivers/block/drbd/drbd_int.h
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@ -799,7 +799,7 @@ extern struct fifo_buffer *fifo_alloc(int fifo_size);
/* flag bits per tconn */
enum {
NET_CONGESTED, /* The data socket is congested */
DISCARD_CONCURRENT, /* Set on one node, cleared on the peer! */
RESOLVE_CONFLICTS, /* Set on one node, cleared on the peer! */
SEND_PING, /* whether asender should send a ping asap */
SIGNAL_ASENDER, /* whether asender wants to be interrupted */
GOT_PING_ACK, /* set when we receive a ping_ack packet, ping_wait gets woken */

2
drivers/block/drbd/drbd_nl.c
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@ -2249,7 +2249,7 @@ void resync_after_online_grow(struct drbd_conf *mdev)
if (mdev->state.role != mdev->state.peer)
iass = (mdev->state.role == R_PRIMARY);
else
iass = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags);
iass = test_bit(RESOLVE_CONFLICTS, &mdev->tconn->flags);
if (iass)
drbd_start_resync(mdev, C_SYNC_SOURCE);

20
drivers/block/drbd/drbd_receiver.c
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@ -916,7 +916,7 @@ static int conn_connect(struct drbd_tconn *tconn)
sock.socket = s;
send_first_packet(tconn, &sock, P_INITIAL_DATA);
} else if (!msock.socket) {
clear_bit(DISCARD_CONCURRENT, &tconn->flags);
clear_bit(RESOLVE_CONFLICTS, &tconn->flags);
msock.socket = s;
send_first_packet(tconn, &msock, P_INITIAL_META);
} else {
@ -954,7 +954,7 @@ retry:
sock.socket = s;
break;
case P_INITIAL_META:
set_bit(DISCARD_CONCURRENT, &tconn->flags);
set_bit(RESOLVE_CONFLICTS, &tconn->flags);
if (msock.socket) {
conn_warn(tconn, "initial packet M crossed\n");
sock_release(msock.socket);
@ -1899,7 +1899,7 @@ static bool need_peer_seq(struct drbd_conf *mdev)
/*
* 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
* if we are in dual-primary mode and we have the resolve-conflicts flag set; see
* handle_write_conflicts().
*/
@ -1907,7 +1907,7 @@ static bool need_peer_seq(struct drbd_conf *mdev)
tp = rcu_dereference(mdev->tconn->net_conf)->two_primaries;
rcu_read_unlock();
return tp && test_bit(DISCARD_CONCURRENT, &tconn->flags);
return tp && test_bit(RESOLVE_CONFLICTS, &tconn->flags);
}
static void update_peer_seq(struct drbd_conf *mdev, unsigned int peer_seq)
@ -2048,7 +2048,7 @@ static int handle_write_conflicts(struct drbd_conf *mdev,
struct drbd_peer_request *peer_req)
{
struct drbd_tconn *tconn = mdev->tconn;
bool resolve_conflicts = test_bit(DISCARD_CONCURRENT, &tconn->flags);
bool resolve_conflicts = test_bit(RESOLVE_CONFLICTS, &tconn->flags);
sector_t sector = peer_req->i.sector;
const unsigned int size = peer_req->i.size;
struct drbd_interval *i;
@ -2600,7 +2600,7 @@ static int drbd_asb_recover_0p(struct drbd_conf *mdev) __must_hold(local)
"Using discard-least-changes instead\n");
case ASB_DISCARD_ZERO_CHG:
if (ch_peer == 0 && ch_self == 0) {
rv = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags)
rv = test_bit(RESOLVE_CONFLICTS, &mdev->tconn->flags)
? -1 : 1;
break;
} else {
@ -2616,7 +2616,7 @@ static int drbd_asb_recover_0p(struct drbd_conf *mdev) __must_hold(local)
rv = 1;
else /* ( ch_self == ch_peer ) */
/* Well, then use something else. */
rv = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags)
rv = test_bit(RESOLVE_CONFLICTS, &mdev->tconn->flags)
? -1 : 1;
break;
case ASB_DISCARD_LOCAL:
@ -2839,7 +2839,7 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
case 1: /* self_pri && !peer_pri */ return 1;
case 2: /* !self_pri && peer_pri */ return -1;
case 3: /* self_pri && peer_pri */
dc = test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags);
dc = test_bit(RESOLVE_CONFLICTS, &mdev->tconn->flags);
return dc ? -1 : 1;
}
}
@ -3775,7 +3775,7 @@ static int receive_req_state(struct drbd_tconn *tconn, struct packet_info *pi)
mask.i = be32_to_cpu(p->mask);
val.i = be32_to_cpu(p->val);
if (test_bit(DISCARD_CONCURRENT, &mdev->tconn->flags) &&
if (test_bit(RESOLVE_CONFLICTS, &mdev->tconn->flags) &&
mutex_is_locked(mdev->state_mutex)) {
drbd_send_sr_reply(mdev, SS_CONCURRENT_ST_CHG);
return 0;
@ -3801,7 +3801,7 @@ static int receive_req_conn_state(struct drbd_tconn *tconn, struct packet_info *
mask.i = be32_to_cpu(p->mask);
val.i = be32_to_cpu(p->val);
if (test_bit(DISCARD_CONCURRENT, &tconn->flags) &&
if (test_bit(RESOLVE_CONFLICTS, &tconn->flags) &&
mutex_is_locked(&tconn->cstate_mutex)) {
conn_send_sr_reply(tconn, SS_CONCURRENT_ST_CHG);
return 0;