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drbd: Refuse to change network options online when... 

* the peer does not speak protocol_version 100 and the
  user wants to change one of:
    - wire_protocol
    - two_primaries
    - integrity_alg

* the user wants to remove the allow_two_primaries flag
  when there are two primaries

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2011-05-16 14:30:24 +02:00
parent c5482bbd96
commit dcb20d1a8e
2 changed files with 19 additions and 4 deletions
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22
drivers/block/drbd/drbd_nl.c
View File

@ -1722,10 +1722,24 @@ _check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct n
struct drbd_conf *mdev;
int i;
if (old_conf && tconn->agreed_pro_version < 100 &&
tconn->cstate == C_WF_REPORT_PARAMS &&
new_conf->wire_protocol != old_conf->wire_protocol)
return ERR_NEED_APV_100;
if (old_conf && tconn->cstate == C_WF_REPORT_PARAMS && tconn->agreed_pro_version < 100) {
if (new_conf->wire_protocol != old_conf->wire_protocol)
return ERR_NEED_APV_100;
if (new_conf->two_primaries != old_conf->two_primaries)
return ERR_NEED_APV_100;
if (!new_conf->integrity_alg != !old_conf->integrity_alg)
return ERR_NEED_APV_100;
if (strcmp(new_conf->integrity_alg, old_conf->integrity_alg))
return ERR_NEED_APV_100;
}
if (!new_conf->two_primaries &&
conn_highest_role(tconn) == R_PRIMARY &&
conn_highest_peer(tconn) == R_PRIMARY)
return ERR_NEED_ALLOW_TWO_PRI;
if (new_conf->two_primaries &&
(new_conf->wire_protocol != DRBD_PROT_C))

1
include/linux/drbd.h
View File

@ -161,6 +161,7 @@ enum drbd_ret_code {
ERR_MINOR_EXISTS = 161,
ERR_INVALID_REQUEST = 162,
ERR_NEED_APV_100 = 163,
ERR_NEED_ALLOW_TWO_PRI = 164,
/* insert new ones above this line */
AFTER_LAST_ERR_CODE