From: Philipp Reisner <philipp.reisner@linbit.com>
To: linux-kernel@vger.kernel.org, Jens Axboe <axboe@kernel.dk>
Cc: drbd-dev@lists.linbit.com
Subject: [PATCH 07/11] drbd: Check consistency of net options when the get changed online
Date: Fri, 30 Sep 2011 14:48:22 +0200 [thread overview]
Message-ID: <1317386906-19260-8-git-send-email-philipp.reisner@linbit.com> (raw)
In-Reply-To: <1317386906-19260-1-git-send-email-philipp.reisner@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---
drivers/block/drbd/drbd_nl.c | 79 ++++++++++++++++++++++++------------------
1 files changed, 45 insertions(+), 34 deletions(-)
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 331da4f..0bf1c2e 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1705,6 +1705,45 @@ static bool conn_ov_running(struct drbd_tconn *tconn)
return rv;
}
+static enum drbd_ret_code
+check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf)
+{
+ struct drbd_conf *mdev;
+ int i;
+
+ if (new_conf->two_primaries &&
+ (new_conf->wire_protocol != DRBD_PROT_C))
+ return ERR_NOT_PROTO_C;
+
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, i) {
+ if (get_ldev(mdev)) {
+ enum drbd_fencing_p fp = mdev->ldev->dc.fencing;
+ put_ldev(mdev);
+ if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) {
+ rcu_read_unlock();
+ return ERR_STONITH_AND_PROT_A;
+ }
+ }
+ if (mdev->state.role == R_PRIMARY && new_conf->want_lose) {
+ rcu_read_unlock();
+ return ERR_DISCARD;
+ }
+ if (!mdev->bitmap) {
+ if(drbd_bm_init(mdev)) {
+ rcu_read_unlock();
+ return ERR_NOMEM;
+ }
+ }
+ }
+ rcu_read_unlock();
+
+ if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A)
+ return ERR_CONG_NOT_PROTO_A;
+
+ return NO_ERROR;
+}
+
int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
{
enum drbd_ret_code retcode;
@@ -1763,6 +1802,10 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
goto fail;
}
+ retcode = check_net_options(tconn, new_conf);
+ if (retcode != NO_ERROR)
+ goto fail;
+
/* re-sync running */
rsr = conn_resync_running(tconn);
if (rsr && strcmp(new_conf->csums_alg, tconn->net_conf->csums_alg)) {
@@ -1922,39 +1965,9 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
goto fail;
}
- if (new_conf->two_primaries
- && (new_conf->wire_protocol != DRBD_PROT_C)) {
- retcode = ERR_NOT_PROTO_C;
- goto fail;
- }
-
- rcu_read_lock();
- idr_for_each_entry(&tconn->volumes, mdev, i) {
- if (get_ldev(mdev)) {
- enum drbd_fencing_p fp = mdev->ldev->dc.fencing;
- put_ldev(mdev);
- if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) {
- retcode = ERR_STONITH_AND_PROT_A;
- goto fail_rcu_unlock;
- }
- }
- if (mdev->state.role == R_PRIMARY && new_conf->want_lose) {
- retcode = ERR_DISCARD;
- goto fail_rcu_unlock;
- }
- if (!mdev->bitmap) {
- if(drbd_bm_init(mdev)) {
- retcode = ERR_NOMEM;
- goto fail_rcu_unlock;
- }
- }
- }
- rcu_read_unlock();
-
- if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) {
- retcode = ERR_CONG_NOT_PROTO_A;
+ retcode = check_net_options(tconn, new_conf);
+ if (retcode != NO_ERROR)
goto fail;
- }
retcode = NO_ERROR;
@@ -2074,8 +2087,6 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
drbd_adm_finish(info, retcode);
return 0;
-fail_rcu_unlock:
- rcu_read_unlock();
fail:
kfree(int_dig_in);
kfree(int_dig_vv);
--
1.7.4.1
next prev parent reply other threads:[~2011-09-30 12:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-30 12:48 [RFC 00/11] drbd: part 12 of adding multiple volume support to drbd Philipp Reisner
2011-09-30 12:48 ` [PATCH 01/11] drbd: drbd_delete_device() takes a struct drbd_conf * now Philipp Reisner
2011-09-30 12:48 ` [PATCH 02/11] drbd: Inlined drbd_free_mdev(); it got called only from one place Philipp Reisner
2011-09-30 12:48 ` [PATCH 03/11] drbd: rcu_read_[un]lock() for all idr accesses that do not sleep Philipp Reisner
2011-09-30 12:48 ` [PATCH 04/11] drbd: Converted drbd_cfg_mutex into drbd_cfg_rwsem Philipp Reisner
2011-09-30 12:48 ` [PATCH 05/11] drbd: protect all idr accesses that might sleep with drbd_cfg_rwsem Philipp Reisner
2011-09-30 12:48 ` [PATCH 06/11] drbd: Runtime changeable wire protocol Philipp Reisner
2011-09-30 12:48 ` Philipp Reisner [this message]
2011-09-30 12:48 ` [PATCH 08/11] drbd: Allow online change of replication protocol only with agreed_pv >= 100 Philipp Reisner
2011-09-30 12:48 ` [PATCH 09/11] drbd: rcu_read_lock() and rcu_dereference() for tconn->net_conf Philipp Reisner
2011-09-30 12:48 ` [PATCH 10/11] drbd: Proper locking for updates to net_conf under RCU Philipp Reisner
2011-09-30 12:48 ` [PATCH 11/11] drbd: Considering that the two_primaries config flag can change Philipp Reisner
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