[PATCH v2 6/7] drbd: pass drbd_peer_device to __req_mod

From: Christoph Böhmwalder
Date: Thu Mar 02 2023 - 07:56:09 EST

Next message: Christoph Böhmwalder: "[PATCH v2 3/7] drbd: Add peer device parameter to whole-bitmap I/O handlers"
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In preparation to support multiple connections, we need to know which
one we need to modify the request state for.

Originally-from: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@xxxxxxxxxx>
---
drivers/block/drbd/drbd_main.c | 13 +++++++++----
drivers/block/drbd/drbd_receiver.c | 18 ++++++++++--------
drivers/block/drbd/drbd_req.c | 21 +++++++++++++--------
drivers/block/drbd/drbd_req.h | 11 +++++++----
drivers/block/drbd/drbd_worker.c | 14 +++++++-------
5 files changed, 46 insertions(+), 31 deletions(-)

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 6647f84f3879..83987e7a5ef2 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -231,9 +231,11 @@ void tl_release(struct drbd_connection *connection, unsigned int barrier_nr,
}
req = list_prepare_entry(tmp, &connection->transfer_log, tl_requests);
list_for_each_entry_safe_from(req, r, &connection->transfer_log, tl_requests) {
+ struct drbd_peer_device *peer_device;
if (req->epoch != expect_epoch)
break;
- _req_mod(req, BARRIER_ACKED);
+ peer_device = conn_peer_device(connection, req->device->vnr);
+ _req_mod(req, BARRIER_ACKED, peer_device);
}
spin_unlock_irq(&connection->resource->req_lock);

@@ -256,10 +258,13 @@ void tl_release(struct drbd_connection *connection, unsigned int barrier_nr,
/* must hold resource->req_lock */
void _tl_restart(struct drbd_connection *connection, enum drbd_req_event what)
{
+ struct drbd_peer_device *peer_device;
struct drbd_request *req, *r;

- list_for_each_entry_safe(req, r, &connection->transfer_log, tl_requests)
- _req_mod(req, what);
+ list_for_each_entry_safe(req, r, &connection->transfer_log, tl_requests) {
+ peer_device = conn_peer_device(connection, req->device->vnr);
+ _req_mod(req, what, peer_device);
+ }
}

void tl_restart(struct drbd_connection *connection, enum drbd_req_event what)
@@ -297,7 +302,7 @@ void tl_abort_disk_io(struct drbd_device *device)
continue;
if (req->device != device)
continue;
- _req_mod(req, ABORT_DISK_IO);
+ _req_mod(req, ABORT_DISK_IO, NULL);
}
spin_unlock_irq(&connection->resource->req_lock);
}
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index e352880c70b5..856c0e3a6630 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -2138,7 +2138,7 @@ static int receive_DataReply(struct drbd_connection *connection, struct packet_i

err = recv_dless_read(peer_device, req, sector, pi->size);
if (!err)
- req_mod(req, DATA_RECEIVED);
+ req_mod(req, DATA_RECEIVED, peer_device);
/* else: nothing. handled from drbd_disconnect...
* I don't think we may complete this just yet
* in case we are "on-disconnect: freeze" */
@@ -2196,7 +2196,7 @@ static void restart_conflicting_writes(struct drbd_device *device,
continue;
/* as it is RQ_POSTPONED, this will cause it to
* be queued on the retry workqueue. */
- __req_mod(req, CONFLICT_RESOLVED, NULL);
+ __req_mod(req, CONFLICT_RESOLVED, NULL, NULL);
}
}

@@ -2420,6 +2420,7 @@ static blk_opf_t wire_flags_to_bio(struct drbd_connection *connection, u32 dpf)
static void fail_postponed_requests(struct drbd_device *device, sector_t sector,
unsigned int size)
{
+ struct drbd_peer_device *peer_device = first_peer_device(device);
struct drbd_interval *i;

repeat:
@@ -2433,7 +2434,7 @@ static void fail_postponed_requests(struct drbd_device *device, sector_t sector,
if (!(req->rq_state & RQ_POSTPONED))
continue;
req->rq_state &= ~RQ_POSTPONED;
- __req_mod(req, NEG_ACKED, &m);
+ __req_mod(req, NEG_ACKED, peer_device, &m);
spin_unlock_irq(&device->resource->req_lock);
if (m.bio)
complete_master_bio(device, &m);
@@ -5661,10 +5662,11 @@ static int got_IsInSync(struct drbd_connection *connection, struct packet_info *
}

static int
-validate_req_change_req_state(struct drbd_device *device, u64 id, sector_t sector,
+validate_req_change_req_state(struct drbd_peer_device *peer_device, u64 id, sector_t sector,
struct rb_root *root, const char *func,
enum drbd_req_event what, bool missing_ok)
{
+ struct drbd_device *device = peer_device->device;
struct drbd_request *req;
struct bio_and_error m;

@@ -5674,7 +5676,7 @@ validate_req_change_req_state(struct drbd_device *device, u64 id, sector_t secto
spin_unlock_irq(&device->resource->req_lock);
return -EIO;
}
- __req_mod(req, what, &m);
+ __req_mod(req, what, peer_device, &m);
spin_unlock_irq(&device->resource->req_lock);

if (m.bio)
@@ -5723,7 +5725,7 @@ static int got_BlockAck(struct drbd_connection *connection, struct packet_info *
BUG();
}

- return validate_req_change_req_state(device, p->block_id, sector,
+ return validate_req_change_req_state(peer_device, p->block_id, sector,
&device->write_requests, __func__,
what, false);
}
@@ -5750,7 +5752,7 @@ static int got_NegAck(struct drbd_connection *connection, struct packet_info *pi
return 0;
}

- err = validate_req_change_req_state(device, p->block_id, sector,
+ err = validate_req_change_req_state(peer_device, p->block_id, sector,
&device->write_requests, __func__,
NEG_ACKED, true);
if (err) {
@@ -5781,7 +5783,7 @@ static int got_NegDReply(struct drbd_connection *connection, struct packet_info
drbd_err(device, "Got NegDReply; Sector %llus, len %u.\n",
(unsigned long long)sector, be32_to_cpu(p->blksize));

- return validate_req_change_req_state(device, p->block_id, sector,
+ return validate_req_change_req_state(peer_device, p->block_id, sector,
&device->read_requests, __func__,
NEG_ACKED, false);
}
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index e36216d50753..528f29ebf369 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -552,12 +552,15 @@ static inline bool is_pending_write_protocol_A(struct drbd_request *req)
* happen "atomically" within the req_lock,
* and it enforces that we have to think in a very structured manner
* about the "events" that may happen to a request during its life time ...
+ *
+ *
+ * peer_device == NULL means local disk
*/
int __req_mod(struct drbd_request *req, enum drbd_req_event what,
+ struct drbd_peer_device *peer_device,
struct bio_and_error *m)
{
struct drbd_device *const device = req->device;
- struct drbd_peer_device *const peer_device = first_peer_device(device);
struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL;
struct net_conf *nc;
int p, rv = 0;
@@ -1100,6 +1103,7 @@ static bool drbd_should_send_out_of_sync(union drbd_dev_state s)
static int drbd_process_write_request(struct drbd_request *req)
{
struct drbd_device *device = req->device;
+ struct drbd_peer_device *peer_device = first_peer_device(device);
int remote, send_oos;

remote = drbd_should_do_remote(device->state);
@@ -1115,7 +1119,7 @@ static int drbd_process_write_request(struct drbd_request *req)
/* The only size==0 bios we expect are empty flushes. */
D_ASSERT(device, req->master_bio->bi_opf & REQ_PREFLUSH);
if (remote)
- _req_mod(req, QUEUE_AS_DRBD_BARRIER);
+ _req_mod(req, QUEUE_AS_DRBD_BARRIER, peer_device);
return remote;
}

@@ -1125,10 +1129,10 @@ static int drbd_process_write_request(struct drbd_request *req)
D_ASSERT(device, !(remote && send_oos));

if (remote) {
- _req_mod(req, TO_BE_SENT);
- _req_mod(req, QUEUE_FOR_NET_WRITE);
+ _req_mod(req, TO_BE_SENT, peer_device);
+ _req_mod(req, QUEUE_FOR_NET_WRITE, peer_device);
} else if (drbd_set_out_of_sync(device, req->i.sector, req->i.size))
- _req_mod(req, QUEUE_FOR_SEND_OOS);
+ _req_mod(req, QUEUE_FOR_SEND_OOS, peer_device);

return remote;
}
@@ -1312,6 +1316,7 @@ static void drbd_update_plug(struct drbd_plug_cb *plug, struct drbd_request *req
static void drbd_send_and_submit(struct drbd_device *device, struct drbd_request *req)
{
struct drbd_resource *resource = device->resource;
+ struct drbd_peer_device *peer_device = first_peer_device(device);
const int rw = bio_data_dir(req->master_bio);
struct bio_and_error m = { NULL, };
bool no_remote = false;
@@ -1375,8 +1380,8 @@ static void drbd_send_and_submit(struct drbd_device *device, struct drbd_request
/* We either have a private_bio, or we can read from remote.
* Otherwise we had done the goto nodata above. */
if (req->private_bio == NULL) {
- _req_mod(req, TO_BE_SENT);
- _req_mod(req, QUEUE_FOR_NET_READ);
+ _req_mod(req, TO_BE_SENT, peer_device);
+ _req_mod(req, QUEUE_FOR_NET_READ, peer_device);
} else
no_remote = true;
}
@@ -1397,7 +1402,7 @@ static void drbd_send_and_submit(struct drbd_device *device, struct drbd_request
req->pre_submit_jif = jiffies;
list_add_tail(&req->req_pending_local,
&device->pending_completion[rw == WRITE]);
- _req_mod(req, TO_BE_SUBMITTED);
+ _req_mod(req, TO_BE_SUBMITTED, NULL);
/* but we need to give up the spinlock to submit */
submit_private_bio = true;
} else if (no_remote) {
diff --git a/drivers/block/drbd/drbd_req.h b/drivers/block/drbd/drbd_req.h
index b4017b5c3fbc..9ae860e7591b 100644
--- a/drivers/block/drbd/drbd_req.h
+++ b/drivers/block/drbd/drbd_req.h
@@ -267,6 +267,7 @@ struct bio_and_error {
extern void start_new_tl_epoch(struct drbd_connection *connection);
extern void drbd_req_destroy(struct kref *kref);
extern int __req_mod(struct drbd_request *req, enum drbd_req_event what,
+ struct drbd_peer_device *peer_device,
struct bio_and_error *m);
extern void complete_master_bio(struct drbd_device *device,
struct bio_and_error *m);
@@ -280,14 +281,15 @@ extern void drbd_restart_request(struct drbd_request *req);

/* use this if you don't want to deal with calling complete_master_bio()
* outside the spinlock, e.g. when walking some list on cleanup. */
-static inline int _req_mod(struct drbd_request *req, enum drbd_req_event what)
+static inline int _req_mod(struct drbd_request *req, enum drbd_req_event what,
+ struct drbd_peer_device *peer_device)
{
struct drbd_device *device = req->device;
struct bio_and_error m;
int rv;

/* __req_mod possibly frees req, do not touch req after that! */
- rv = __req_mod(req, what, &m);
+ rv = __req_mod(req, what, peer_device, &m);
if (m.bio)
complete_master_bio(device, &m);

@@ -299,7 +301,8 @@ static inline int _req_mod(struct drbd_request *req, enum drbd_req_event what)
* of the lower level driver completion callback, so we need to
* spin_lock_irqsave here. */
static inline int req_mod(struct drbd_request *req,
- enum drbd_req_event what)
+ enum drbd_req_event what,
+ struct drbd_peer_device *peer_device)
{
unsigned long flags;
struct drbd_device *device = req->device;
@@ -307,7 +310,7 @@ static inline int req_mod(struct drbd_request *req,
int rv;

spin_lock_irqsave(&device->resource->req_lock, flags);
- rv = __req_mod(req, what, &m);
+ rv = __req_mod(req, what, peer_device, &m);
spin_unlock_irqrestore(&device->resource->req_lock, flags);

if (m.bio)
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 68d5ba4af17d..6455edca7aa9 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -276,7 +276,7 @@ void drbd_request_endio(struct bio *bio)

/* not req_mod(), we need irqsave here! */
spin_lock_irqsave(&device->resource->req_lock, flags);
- __req_mod(req, what, &m);
+ __req_mod(req, what, NULL, &m);
spin_unlock_irqrestore(&device->resource->req_lock, flags);
put_ldev(device);

@@ -1425,7 +1425,7 @@ int w_send_out_of_sync(struct drbd_work *w, int cancel)
int err;

if (unlikely(cancel)) {
- req_mod(req, SEND_CANCELED);
+ req_mod(req, SEND_CANCELED, peer_device);
return 0;
}
req->pre_send_jif = jiffies;
@@ -1437,7 +1437,7 @@ int w_send_out_of_sync(struct drbd_work *w, int cancel)
maybe_send_barrier(connection, req->epoch);

err = drbd_send_out_of_sync(peer_device, req);
- req_mod(req, OOS_HANDED_TO_NETWORK);
+ req_mod(req, OOS_HANDED_TO_NETWORK, peer_device);

return err;
}
@@ -1457,7 +1457,7 @@ int w_send_dblock(struct drbd_work *w, int cancel)
int err;

if (unlikely(cancel)) {
- req_mod(req, SEND_CANCELED);
+ req_mod(req, SEND_CANCELED, peer_device);
return 0;
}
req->pre_send_jif = jiffies;
@@ -1467,7 +1467,7 @@ int w_send_dblock(struct drbd_work *w, int cancel)
connection->send.current_epoch_writes++;

err = drbd_send_dblock(peer_device, req);
- req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK);
+ req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK, peer_device);

if (do_send_unplug && !err)
pd_send_unplug_remote(peer_device);
@@ -1490,7 +1490,7 @@ int w_send_read_req(struct drbd_work *w, int cancel)
int err;

if (unlikely(cancel)) {
- req_mod(req, SEND_CANCELED);
+ req_mod(req, SEND_CANCELED, peer_device);
return 0;
}
req->pre_send_jif = jiffies;
@@ -1502,7 +1502,7 @@ int w_send_read_req(struct drbd_work *w, int cancel)
err = drbd_send_drequest(peer_device, P_DATA_REQUEST, req->i.sector, req->i.size,
(unsigned long)req);

- req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK);
+ req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK, peer_device);

if (do_send_unplug && !err)
pd_send_unplug_remote(peer_device);
--
2.39.1

Next message: Christoph Böhmwalder: "[PATCH v2 3/7] drbd: Add peer device parameter to whole-bitmap I/O handlers"
Previous message: Christoph Böhmwalder: "[PATCH v2 5/7] drbd: drbd_uuid_compare: pass a peer_device"
In reply to: Christoph Böhmwalder: "[PATCH v2 5/7] drbd: drbd_uuid_compare: pass a peer_device"
Next in thread: Christoph Böhmwalder: "[PATCH v2 3/7] drbd: Add peer device parameter to whole-bitmap I/O handlers"
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