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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2010-06-11 13:56:33 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2010-10-14 14:58:36 +0200 |
| commit | 87f7be4cf88e93069f4cc63baf2ce70fdfc59c63 (patch) | |
| tree | b76a190b93d4a5d3629c7f25737e11c8231efd6c /drivers/block | |
| parent | 1616a25493cce727d582886f162c5bb0abd87e6a (diff) | |
| download | lwn-87f7be4cf88e93069f4cc63baf2ce70fdfc59c63.tar.gz lwn-87f7be4cf88e93069f4cc63baf2ce70fdfc59c63.zip | |
drbd: Run the fence-peer helper asynchronously
Since we can not thaw the transfer log, the next logical step is
to allow reconnects while the fence-peer handler runs.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 3 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_nl.c | 21 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 8 |
3 files changed, 25 insertions, 7 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 03cc975b9e6c..ab20c0062d21 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -1423,7 +1423,8 @@ extern void resync_after_online_grow(struct drbd_conf *); extern void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int) __must_hold(local); extern int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force); -enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev); +extern enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev); +extern void drbd_try_outdate_peer_async(struct drbd_conf *mdev); extern int drbd_khelper(struct drbd_conf *mdev, char *cmd); /* drbd_worker.c */ diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index cda7cb3202b9..32d00720470b 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -38,6 +38,8 @@ #include <asm/unaligned.h> #include <linux/drbd_tag_magic.h> #include <linux/drbd_limits.h> +#include <linux/compiler.h> +#include <linux/kthread.h> static unsigned short *tl_add_blob(unsigned short *, enum drbd_tags, const void *, int); static unsigned short *tl_add_str(unsigned short *, enum drbd_tags, const char *); @@ -256,6 +258,25 @@ enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev) return nps; } +static int _try_outdate_peer_async(void *data) +{ + struct drbd_conf *mdev = (struct drbd_conf *)data; + enum drbd_disk_state nps; + + nps = drbd_try_outdate_peer(mdev); + drbd_request_state(mdev, NS(pdsk, nps)); + + return 0; +} + +void drbd_try_outdate_peer_async(struct drbd_conf *mdev) +{ + struct task_struct *opa; + + opa = kthread_run(_try_outdate_peer_async, mdev, "drbd%d_a_helper", mdev_to_minor(mdev)); + if (IS_ERR(opa)) + dev_err(DEV, "out of mem, failed to invoke fence-peer helper\n"); +} int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) { diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 72bc1a130645..101ad186244c 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -3747,12 +3747,8 @@ static void drbd_disconnect(struct drbd_conf *mdev) put_ldev(mdev); } - if (mdev->state.role == R_PRIMARY) { - if (fp >= FP_RESOURCE && mdev->state.pdsk >= D_UNKNOWN) { - enum drbd_disk_state nps = drbd_try_outdate_peer(mdev); - drbd_request_state(mdev, NS(pdsk, nps)); - } - } + if (mdev->state.role == R_PRIMARY && fp >= FP_RESOURCE && mdev->state.pdsk >= D_UNKNOWN) + drbd_try_outdate_peer_async(mdev); spin_lock_irq(&mdev->req_lock); os = mdev->state; |