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drbd: receive_protocol(): Make the program flow less confusing 

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Andreas Gruenbacher 2011-07-15 17:04:26 +02:00 committed by Philipp Reisner
parent b792c35cfb
commit fbc12f4514
1 changed files with 44 additions and 47 deletions
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91
drivers/block/drbd/drbd_receiver.c
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@ -3083,55 +3083,52 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
synchronize_rcu();
kfree(old_net_conf);
} else {
clear_bit(CONN_DRY_RUN, &tconn->flags);
return 0;
if (cf & CF_DRY_RUN)
set_bit(CONN_DRY_RUN, &tconn->flags);
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
if (p_proto != nc->wire_protocol) {
conn_err(tconn, "incompatible communication protocols\n");
goto disconnect_rcu_unlock;
}
if (convert_after_sb(p_after_sb_0p) != nc->after_sb_0p) {
conn_err(tconn, "incompatible after-sb-0pri settings\n");
goto disconnect_rcu_unlock;
}
if (convert_after_sb(p_after_sb_1p) != nc->after_sb_1p) {
conn_err(tconn, "incompatible after-sb-1pri settings\n");
goto disconnect_rcu_unlock;
}
if (convert_after_sb(p_after_sb_2p) != nc->after_sb_2p) {
conn_err(tconn, "incompatible after-sb-2pri settings\n");
goto disconnect_rcu_unlock;
}
if (p_discard_my_data && nc->discard_my_data) {
conn_err(tconn, "both sides have the 'discard_my_data' flag set\n");
goto disconnect_rcu_unlock;
}
if (p_two_primaries != nc->two_primaries) {
conn_err(tconn, "incompatible setting of the two-primaries options\n");
goto disconnect_rcu_unlock;
}
if (strcmp(integrity_alg, nc->integrity_alg)) {
conn_err(tconn, "incompatible setting of the data-integrity-alg\n");
goto disconnect_rcu_unlock;
}
rcu_read_unlock();
}
clear_bit(CONN_DRY_RUN, &tconn->flags);
if (cf & CF_DRY_RUN)
set_bit(CONN_DRY_RUN, &tconn->flags);
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
if (p_proto != nc->wire_protocol) {
conn_err(tconn, "incompatible communication protocols\n");
goto disconnect_rcu_unlock;
}
if (convert_after_sb(p_after_sb_0p) != nc->after_sb_0p) {
conn_err(tconn, "incompatible after-sb-0pri settings\n");
goto disconnect_rcu_unlock;
}
if (convert_after_sb(p_after_sb_1p) != nc->after_sb_1p) {
conn_err(tconn, "incompatible after-sb-1pri settings\n");
goto disconnect_rcu_unlock;
}
if (convert_after_sb(p_after_sb_2p) != nc->after_sb_2p) {
conn_err(tconn, "incompatible after-sb-2pri settings\n");
goto disconnect_rcu_unlock;
}
if (p_discard_my_data && nc->discard_my_data) {
conn_err(tconn, "both sides have the 'discard_my_data' flag set\n");
goto disconnect_rcu_unlock;
}
if (p_two_primaries != nc->two_primaries) {
conn_err(tconn, "incompatible setting of the two-primaries options\n");
goto disconnect_rcu_unlock;
}
if (strcmp(integrity_alg, nc->integrity_alg)) {
conn_err(tconn, "incompatible setting of the data-integrity-alg\n");
goto disconnect_rcu_unlock;
}
rcu_read_unlock();
return 0;
disconnect_rcu_unlock: