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Message-Id: <1404143587-24344-2-git-send-email-philipp.reisner@linbit.com>
Date: Mon, 30 Jun 2014 17:52:50 +0200
From: Philipp Reisner <philipp.reisner@...bit.com>
To: linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>
Cc: drbd-dev@...ts.linbit.com
Subject: [PATCH 01/18] drbd: Move write_ordering from connection to resource
Signed-off-by: Philipp Reisner <philipp.reisner@...bit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@...bit.com>
---
drivers/block/drbd/drbd_int.h | 5 +++--
drivers/block/drbd/drbd_main.c | 2 +-
drivers/block/drbd/drbd_nl.c | 4 ++--
drivers/block/drbd/drbd_proc.c | 2 +-
drivers/block/drbd/drbd_receiver.c | 25 ++++++++++++-------------
5 files changed, 19 insertions(+), 19 deletions(-)
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index a76ceb3..1ef2474 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -594,6 +594,8 @@ struct drbd_resource {
unsigned susp_nod:1; /* IO suspended because no data */
unsigned susp_fen:1; /* IO suspended because fence peer handler runs */
+ enum write_ordering_e write_ordering;
+
cpumask_var_t cpu_mask;
};
@@ -636,7 +638,6 @@ struct drbd_connection {
struct drbd_epoch *current_epoch;
spinlock_t epoch_lock;
unsigned int epochs;
- enum write_ordering_e write_ordering;
atomic_t current_tle_nr; /* transfer log epoch number */
unsigned current_tle_writes; /* writes seen within this tl epoch */
@@ -1478,7 +1479,7 @@ static inline void drbd_generic_make_request(struct drbd_device *device,
generic_make_request(bio);
}
-void drbd_bump_write_ordering(struct drbd_connection *connection, enum write_ordering_e wo);
+void drbd_bump_write_ordering(struct drbd_resource *resource, enum write_ordering_e wo);
/* drbd_proc.c */
extern struct proc_dir_entry *drbd_proc;
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 960645c..17b9a23 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2579,6 +2579,7 @@ struct drbd_resource *drbd_create_resource(const char *name)
kref_init(&resource->kref);
idr_init(&resource->devices);
INIT_LIST_HEAD(&resource->connections);
+ resource->write_ordering = WO_bdev_flush;
list_add_tail_rcu(&resource->resources, &drbd_resources);
mutex_init(&resource->conf_update);
mutex_init(&resource->adm_mutex);
@@ -2617,7 +2618,6 @@ struct drbd_connection *conn_create(const char *name, struct res_opts *res_opts)
INIT_LIST_HEAD(&connection->current_epoch->list);
connection->epochs = 1;
spin_lock_init(&connection->epoch_lock);
- connection->write_ordering = WO_bdev_flush;
connection->send.seen_any_write_yet = false;
connection->send.current_epoch_nr = 0;
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 1b35c45..43fad2c 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1399,7 +1399,7 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
else
set_bit(MD_NO_FUA, &device->flags);
- drbd_bump_write_ordering(first_peer_device(device)->connection, WO_bdev_flush);
+ drbd_bump_write_ordering(device->resource, WO_bdev_flush);
drbd_md_sync(device);
@@ -1704,7 +1704,7 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
new_disk_conf = NULL;
new_plan = NULL;
- drbd_bump_write_ordering(first_peer_device(device)->connection, WO_bdev_flush);
+ drbd_bump_write_ordering(device->resource, WO_bdev_flush);
if (drbd_md_test_flag(device->ldev, MDF_CRASHED_PRIMARY))
set_bit(CRASHED_PRIMARY, &device->flags);
diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c
index 89736bd..f11e573 100644
--- a/drivers/block/drbd/drbd_proc.c
+++ b/drivers/block/drbd/drbd_proc.c
@@ -281,7 +281,7 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
atomic_read(&device->unacked_cnt),
atomic_read(&device->ap_bio_cnt),
first_peer_device(device)->connection->epochs,
- write_ordering_chars[first_peer_device(device)->connection->write_ordering]
+ write_ordering_chars[device->resource->write_ordering]
);
seq_printf(seq, " oos:%llu\n",
Bit2KB((unsigned long long)
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 5b17ec8..c708418 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1151,7 +1151,7 @@ static void drbd_flush(struct drbd_connection *connection)
struct drbd_peer_device *peer_device;
int vnr;
- if (connection->write_ordering >= WO_bdev_flush) {
+ if (connection->resource->write_ordering >= WO_bdev_flush) {
rcu_read_lock();
idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
struct drbd_device *device = peer_device->device;
@@ -1168,7 +1168,7 @@ static void drbd_flush(struct drbd_connection *connection)
/* would rather check on EOPNOTSUPP, but that is not reliable.
* don't try again for ANY return value != 0
* if (rv == -EOPNOTSUPP) */
- drbd_bump_write_ordering(connection, WO_drain_io);
+ drbd_bump_write_ordering(connection->resource, WO_drain_io);
}
put_ldev(device);
kref_put(&device->kref, drbd_destroy_device);
@@ -1262,10 +1262,10 @@ static enum finish_epoch drbd_may_finish_epoch(struct drbd_connection *connectio
* @connection: DRBD connection.
* @wo: Write ordering method to try.
*/
-void drbd_bump_write_ordering(struct drbd_connection *connection, enum write_ordering_e wo)
+void drbd_bump_write_ordering(struct drbd_resource *resource, enum write_ordering_e wo)
{
struct disk_conf *dc;
- struct drbd_peer_device *peer_device;
+ struct drbd_device *device;
enum write_ordering_e pwo;
int vnr;
static char *write_ordering_str[] = {
@@ -1274,12 +1274,10 @@ void drbd_bump_write_ordering(struct drbd_connection *connection, enum write_ord
[WO_bdev_flush] = "flush",
};
- pwo = connection->write_ordering;
+ pwo = resource->write_ordering;
wo = min(pwo, wo);
rcu_read_lock();
- idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
- struct drbd_device *device = peer_device->device;
-
+ idr_for_each_entry(&resource->devices, device, vnr) {
if (!get_ldev_if_state(device, D_ATTACHING))
continue;
dc = rcu_dereference(device->ldev->disk_conf);
@@ -1291,9 +1289,9 @@ void drbd_bump_write_ordering(struct drbd_connection *connection, enum write_ord
put_ldev(device);
}
rcu_read_unlock();
- connection->write_ordering = wo;
- if (pwo != connection->write_ordering || wo == WO_bdev_flush)
- drbd_info(connection, "Method to ensure write ordering: %s\n", write_ordering_str[connection->write_ordering]);
+ resource->write_ordering = wo;
+ if (pwo != resource->write_ordering || wo == WO_bdev_flush)
+ drbd_info(resource, "Method to ensure write ordering: %s\n", write_ordering_str[resource->write_ordering]);
}
/**
@@ -1471,7 +1469,7 @@ static int receive_Barrier(struct drbd_connection *connection, struct packet_inf
* R_PRIMARY crashes now.
* Therefore we must send the barrier_ack after the barrier request was
* completed. */
- switch (connection->write_ordering) {
+ switch (connection->resource->write_ordering) {
case WO_none:
if (rv == FE_RECYCLED)
return 0;
@@ -1498,7 +1496,8 @@ static int receive_Barrier(struct drbd_connection *connection, struct packet_inf
return 0;
default:
- drbd_err(connection, "Strangeness in connection->write_ordering %d\n", connection->write_ordering);
+ drbd_err(connection, "Strangeness in connection->write_ordering %d\n",
+ connection->resource->write_ordering);
return -EIO;
}
--
1.9.1
--
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