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authorPhilipp Reisner <philipp.reisner@linbit.com>2011-11-09 20:12:34 +0100
committerPhilipp Reisner <philipp.reisner@linbit.com>2012-11-08 16:58:07 +0100
commit4b0007c0e8def19266c767f0410ce81eb39f55c7 (patch)
treea73a97a97d36ad66af6210a61162f5a04138b702 /drivers
parent6936fcb49ab369ad13267e292ec0e3490db91c4a (diff)
downloadvexpress-lsk-4b0007c0e8def19266c767f0410ce81eb39f55c7.tar.gz
drbd: Move write_ordering from mdev to tconn
This is necessary in order to prepare the move of the (receiver side) epoch list from the device (mdev) to the connection (tconn) objects. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/block/drbd/drbd_int.h6
-rw-r--r--drivers/block/drbd/drbd_main.c3
-rw-r--r--drivers/block/drbd/drbd_nl.c3
-rw-r--r--drivers/block/drbd/drbd_proc.c2
-rw-r--r--drivers/block/drbd/drbd_receiver.c65
5 files changed, 48 insertions, 31 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index e3913307e3d..473694605da 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -858,6 +858,8 @@ struct drbd_tconn { /* is a resource from the config file */
void *int_dig_in;
void *int_dig_vv;
+ enum write_ordering_e write_ordering;
+
struct drbd_thread receiver;
struct drbd_thread worker;
struct drbd_thread asender;
@@ -962,7 +964,7 @@ struct drbd_conf {
struct drbd_epoch *current_epoch;
spinlock_t epoch_lock;
unsigned int epochs;
- enum write_ordering_e write_ordering;
+
struct list_head active_ee; /* IO in progress (P_DATA gets written to disk) */
struct list_head sync_ee; /* IO in progress (P_RS_DATA_REPLY gets written to disk) */
struct list_head done_ee; /* need to send P_WRITE_ACK */
@@ -1539,7 +1541,7 @@ static inline void drbd_tcp_quickack(struct socket *sock)
(char*)&val, sizeof(val));
}
-void drbd_bump_write_ordering(struct drbd_conf *mdev, enum write_ordering_e wo);
+void drbd_bump_write_ordering(struct drbd_tconn *tconn, 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 e1234065954..7b1cad895d1 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2130,7 +2130,6 @@ void drbd_init_set_defaults(struct drbd_conf *mdev)
init_waitqueue_head(&mdev->al_wait);
init_waitqueue_head(&mdev->seq_wait);
- mdev->write_ordering = WO_bdev_flush;
mdev->resync_wenr = LC_FREE;
mdev->peer_max_bio_size = DRBD_MAX_BIO_SIZE_SAFE;
mdev->local_max_bio_size = DRBD_MAX_BIO_SIZE_SAFE;
@@ -2625,6 +2624,8 @@ struct drbd_tconn *conn_create(const char *name, struct res_opts *res_opts)
if (!tl_init(tconn))
goto fail;
+ tconn->write_ordering = WO_bdev_flush;
+
tconn->cstate = C_STANDALONE;
mutex_init(&tconn->cstate_mutex);
spin_lock_init(&tconn->req_lock);
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index b342c95b724..b369dd112df 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1497,8 +1497,7 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
new_disk_conf = NULL;
new_plan = NULL;
- mdev->write_ordering = WO_bdev_flush;
- drbd_bump_write_ordering(mdev, WO_bdev_flush);
+ drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush);
if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY))
set_bit(CRASHED_PRIMARY, &mdev->flags);
diff --git a/drivers/block/drbd/drbd_proc.c b/drivers/block/drbd/drbd_proc.c
index 7e68d99e9c9..1321192b377 100644
--- a/drivers/block/drbd/drbd_proc.c
+++ b/drivers/block/drbd/drbd_proc.c
@@ -272,7 +272,7 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
atomic_read(&mdev->unacked_cnt),
atomic_read(&mdev->ap_bio_cnt),
mdev->epochs,
- write_ordering_chars[mdev->write_ordering]
+ write_ordering_chars[mdev->tconn->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 4cdf8a75d71..f6d1ff2e3ab 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1089,21 +1089,29 @@ static int drbd_recv_header(struct drbd_tconn *tconn, struct packet_info *pi)
return err;
}
-static void drbd_flush(struct drbd_conf *mdev)
+static void drbd_flush(struct drbd_tconn *tconn)
{
int rv;
+ struct drbd_conf *mdev;
+ int vnr;
+
+ if (tconn->write_ordering >= WO_bdev_flush) {
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ if (get_ldev(mdev)) {
+ rv = blkdev_issue_flush(mdev->ldev->backing_bdev, GFP_KERNEL,
+ NULL);
+ put_ldev(mdev);
- if (mdev->write_ordering >= WO_bdev_flush && get_ldev(mdev)) {
- rv = blkdev_issue_flush(mdev->ldev->backing_bdev, GFP_KERNEL,
- NULL);
- if (rv) {
- dev_info(DEV, "local disk flush failed with status %d\n", rv);
- /* 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(mdev, WO_drain_io);
+ if (rv) {
+ dev_info(DEV, "local disk flush failed with status %d\n", rv);
+ /* 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(tconn, WO_drain_io);
+ break;
+ }
+ }
}
- put_ldev(mdev);
}
}
@@ -1182,32 +1190,39 @@ static enum finish_epoch drbd_may_finish_epoch(struct drbd_conf *mdev,
/**
* drbd_bump_write_ordering() - Fall back to an other write ordering method
- * @mdev: DRBD device.
+ * @tconn: DRBD connection.
* @wo: Write ordering method to try.
*/
-void drbd_bump_write_ordering(struct drbd_conf *mdev, enum write_ordering_e wo) __must_hold(local)
+void drbd_bump_write_ordering(struct drbd_tconn *tconn, enum write_ordering_e wo)
{
struct disk_conf *dc;
+ struct drbd_conf *mdev;
enum write_ordering_e pwo;
+ int vnr;
static char *write_ordering_str[] = {
[WO_none] = "none",
[WO_drain_io] = "drain",
[WO_bdev_flush] = "flush",
};
- pwo = mdev->write_ordering;
+ pwo = tconn->write_ordering;
wo = min(pwo, wo);
rcu_read_lock();
- dc = rcu_dereference(mdev->ldev->disk_conf);
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ if (!get_ldev(mdev))
+ continue;
+ dc = rcu_dereference(mdev->ldev->disk_conf);
- if (wo == WO_bdev_flush && !dc->disk_flushes)
- wo = WO_drain_io;
- if (wo == WO_drain_io && !dc->disk_drain)
- wo = WO_none;
+ if (wo == WO_bdev_flush && !dc->disk_flushes)
+ wo = WO_drain_io;
+ if (wo == WO_drain_io && !dc->disk_drain)
+ wo = WO_none;
+ put_ldev(mdev);
+ }
rcu_read_unlock();
- mdev->write_ordering = wo;
- if (pwo != mdev->write_ordering || wo == WO_bdev_flush)
- dev_info(DEV, "Method to ensure write ordering: %s\n", write_ordering_str[mdev->write_ordering]);
+ tconn->write_ordering = wo;
+ if (pwo != tconn->write_ordering || wo == WO_bdev_flush)
+ conn_info(tconn, "Method to ensure write ordering: %s\n", write_ordering_str[tconn->write_ordering]);
}
/**
@@ -1341,7 +1356,7 @@ static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
* R_PRIMARY crashes now.
* Therefore we must send the barrier_ack after the barrier request was
* completed. */
- switch (mdev->write_ordering) {
+ switch (tconn->write_ordering) {
case WO_none:
if (rv == FE_RECYCLED)
return 0;
@@ -1358,7 +1373,7 @@ static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
case WO_bdev_flush:
case WO_drain_io:
drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
- drbd_flush(mdev);
+ drbd_flush(tconn);
if (atomic_read(&mdev->current_epoch->epoch_size)) {
epoch = kmalloc(sizeof(struct drbd_epoch), GFP_NOIO);
@@ -1374,7 +1389,7 @@ static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
return 0;
default:
- dev_err(DEV, "Strangeness in mdev->write_ordering %d\n", mdev->write_ordering);
+ dev_err(DEV, "Strangeness in tconn->write_ordering %d\n", tconn->write_ordering);
return -EIO;
}