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drbd: Sending of delay_probes

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2010-05-03 15:10:47 +02:00
parent 0ced55a3be
commit 7237bc430f
2 changed files with 34 additions and 0 deletions
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1
drivers/block/drbd/drbd_int.h
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@ -1046,6 +1046,7 @@ struct drbd_conf {
struct list_head delay_probes; /* protected by peer_seq_lock */
int data_delay; /* Delay of packets on the data-sock behind meta-sock */
atomic_t delay_seq; /* To generate sequence numbers of delay probes */
struct timeval dps_time; /* delay-probes-start-time */
};
static inline struct drbd_conf *minor_to_mdev(unsigned int minor)

33
drivers/block/drbd/drbd_main.c
View File

@ -2188,6 +2188,39 @@ int drbd_send_ov_request(struct drbd_conf *mdev, sector_t sector, int size)
return ok;
}
static int drbd_send_delay_probe(struct drbd_conf *mdev, struct drbd_socket *ds)
{
struct p_delay_probe dp;
int offset, ok = 0;
struct timeval now;
mutex_lock(&ds->mutex);
if (likely(ds->socket)) {
do_gettimeofday(&now);
offset = now.tv_usec - mdev->dps_time.tv_usec +
(now.tv_sec - mdev->dps_time.tv_sec) * 1000000;
dp.seq_num = cpu_to_be32(atomic_read(&mdev->delay_seq));
dp.offset = cpu_to_be32(offset);
ok = _drbd_send_cmd(mdev, ds->socket, P_DELAY_PROBE,
(struct p_header *)&dp, sizeof(dp), 0);
}
mutex_unlock(&ds->mutex);
return ok;
}
static int drbd_send_dalay_probes(struct drbd_conf *mdev)
{
int ok;
atomic_inc(&mdev->delay_seq);
do_gettimeofday(&mdev->dps_time);
ok = drbd_send_delay_probe(mdev, &mdev->meta);
ok = ok && drbd_send_delay_probe(mdev, &mdev->data);
return ok;
}
/* called on sndtimeo
* returns FALSE if we should retry,
* TRUE if we think connection is dead