From 19fffd7b0303e8843aa2decfd43fa57c9d511409 Mon Sep 17 00:00:00 2001 From: Philipp Reisner Date: Tue, 28 Aug 2012 16:48:03 +0200 Subject: [PATCH] drbd: Call drbd_md_sync() explicitly after a state change on the connection Without this, the meta-data gets updates after 5 seconds by the md_sync_timer. Better to do it immeditaly after a state change. If the asender detects a network failure, it may take a bit until the worker processes the according after-conn-state-change work item. The worker might be blocked in sending something, i.e. it takes until it gets into its timeout. That is 6 seconds by default which is longer than the 5 seconds of the md_sync_timer. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- drivers/block/drbd/drbd_int.h | 1 + drivers/block/drbd/drbd_main.c | 16 ++++++++++++++++ drivers/block/drbd/drbd_nl.c | 16 ---------------- drivers/block/drbd/drbd_receiver.c | 1 + drivers/block/drbd/drbd_state.c | 3 +++ 5 files changed, 21 insertions(+), 16 deletions(-) diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 1c1576b..f223f01 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -1116,6 +1116,7 @@ extern void drbd_free_bc(struct drbd_backing_dev *ldev); extern void drbd_mdev_cleanup(struct drbd_conf *mdev); void drbd_print_uuids(struct drbd_conf *mdev, const char *text); +extern void conn_md_sync(struct drbd_tconn *tconn); extern void drbd_md_sync(struct drbd_conf *mdev); extern int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev); extern void drbd_uuid_set(struct drbd_conf *mdev, int idx, u64 val) __must_hold(local); diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 732053d..5e5a6ab 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -2820,6 +2820,22 @@ void drbd_free_sock(struct drbd_tconn *tconn) /* meta data management */ +void conn_md_sync(struct drbd_tconn *tconn) +{ + struct drbd_conf *mdev; + int vnr; + + rcu_read_lock(); + idr_for_each_entry(&tconn->volumes, mdev, vnr) { + kref_get(&mdev->kref); + rcu_read_unlock(); + drbd_md_sync(mdev); + kref_put(&mdev->kref, &drbd_minor_destroy); + rcu_read_lock(); + } + rcu_read_unlock(); +} + struct meta_data_on_disk { u64 la_size; /* last agreed size. */ u64 uuid[UI_SIZE]; /* UUIDs. */ diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 363034a..476491f 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -363,22 +363,6 @@ int drbd_khelper(struct drbd_conf *mdev, char *cmd) return ret; } -static void conn_md_sync(struct drbd_tconn *tconn) -{ - struct drbd_conf *mdev; - int vnr; - - rcu_read_lock(); - idr_for_each_entry(&tconn->volumes, mdev, vnr) { - kref_get(&mdev->kref); - rcu_read_unlock(); - drbd_md_sync(mdev); - kref_put(&mdev->kref, &drbd_minor_destroy); - rcu_read_lock(); - } - rcu_read_unlock(); -} - int conn_khelper(struct drbd_tconn *tconn, char *cmd) { char *envp[] = { "HOME=/", diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index d5afa0a..fed34a7 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -5390,6 +5390,7 @@ int drbd_asender(struct drbd_thread *thi) if (0) { reconnect: conn_request_state(tconn, NS(conn, C_NETWORK_FAILURE), CS_HARD); + conn_md_sync(tconn); } if (0) { disconnect: diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c index c3ec578..84512ec 100644 --- a/drivers/block/drbd/drbd_state.c +++ b/drivers/block/drbd/drbd_state.c @@ -1563,6 +1563,9 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused) } } kref_put(&tconn->kref, &conn_destroy); + + conn_md_sync(tconn); + return 0; } -- 2.7.4