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drbd: Cleaned up the resync timer logic 

Besides removed a few lines of code, this moves the inspection
of the state from before the queuing process to after the queuing.
I.e. more closely to the actual invocation of the work.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
hifive-unleashed-5.1
Philipp Reisner 2010-12-27 11:51:23 +01:00
parent da0a78161d
commit 794abb753e
3 changed files with 17 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/block/drbd/drbd_int.h
View File

@ -1540,7 +1540,7 @@ extern int w_e_end_csum_rs_req(struct drbd_conf *, struct drbd_work *, int);
extern int w_e_end_ov_reply(struct drbd_conf *, struct drbd_work *, int);
extern int w_e_end_ov_req(struct drbd_conf *, struct drbd_work *, int);
extern int w_ov_finished(struct drbd_conf *, struct drbd_work *, int);
extern int w_resync_inactive(struct drbd_conf *, struct drbd_work *, int);
extern int w_resync_timer(struct drbd_conf *, struct drbd_work *, int);
extern int w_resume_next_sg(struct drbd_conf *, struct drbd_work *, int);
extern int w_send_write_hint(struct drbd_conf *, struct drbd_work *, int);
extern int w_send_dblock(struct drbd_conf *, struct drbd_work *, int);

2
drivers/block/drbd/drbd_main.c
View File

@ -2978,7 +2978,7 @@ void drbd_init_set_defaults(struct drbd_conf *mdev)
INIT_LIST_HEAD(&mdev->start_resync_work.list);
INIT_LIST_HEAD(&mdev->bm_io_work.w.list);
mdev->resync_work.cb = w_resync_inactive;
mdev->resync_work.cb = w_resync_timer;
mdev->unplug_work.cb = w_send_write_hint;
mdev->go_diskless.cb = w_go_diskless;
mdev->md_sync_work.cb = w_md_sync;

56
drivers/block/drbd/drbd_worker.c
View File

@ -253,13 +253,6 @@ int w_read_retry_remote(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
return w_send_read_req(mdev, w, 0);
}
int w_resync_inactive(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
{
ERR_IF(cancel) return 1;
dev_err(DEV, "resync inactive, but callback triggered??\n");
return 1; /* Simply ignore this! */
}
void drbd_csum_ee(struct drbd_conf *mdev, struct crypto_hash *tfm, struct drbd_epoch_entry *e, void *digest)
{
struct hash_desc desc;
@ -389,26 +382,25 @@ defer:
return -EAGAIN;
}
int w_resync_timer(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
{
switch (mdev->state.conn) {
case C_VERIFY_S:
w_make_ov_request(mdev, w, cancel);
break;
case C_SYNC_TARGET:
w_make_resync_request(mdev, w, cancel);
break;
}
return 1;
}
void resync_timer_fn(unsigned long data)
{
struct drbd_conf *mdev = (struct drbd_conf *) data;
int queue;
queue = 1;
switch (mdev->state.conn) {
case C_VERIFY_S:
mdev->resync_work.cb = w_make_ov_request;
break;
case C_SYNC_TARGET:
mdev->resync_work.cb = w_make_resync_request;
break;
default:
queue = 0;
mdev->resync_work.cb = w_resync_inactive;
}
/* harmless race: list_empty outside data.work.q_lock */
if (list_empty(&mdev->resync_work.list) && queue)
if (list_empty(&mdev->resync_work.list))
drbd_queue_work(&mdev->data.work, &mdev->resync_work);
}
@ -525,15 +517,6 @@ static int w_make_resync_request(struct drbd_conf *mdev,
if (unlikely(cancel))
return 1;
if (unlikely(mdev->state.conn < C_CONNECTED)) {
dev_err(DEV, "Confused in w_make_resync_request()! cstate < Connected");
return 0;
}
if (mdev->state.conn != C_SYNC_TARGET)
dev_err(DEV, "%s in w_make_resync_request\n",
drbd_conn_str(mdev->state.conn));
if (mdev->rs_total == 0) {
/* empty resync? */
drbd_resync_finished(mdev);
@ -546,7 +529,6 @@ static int w_make_resync_request(struct drbd_conf *mdev,
to continue resync with a broken disk makes no sense at
all */
dev_err(DEV, "Disk broke down during resync!\n");
mdev->resync_work.cb = w_resync_inactive;
return 1;
}
@ -580,7 +562,6 @@ next_sector:
if (bit == DRBD_END_OF_BITMAP) {
mdev->bm_resync_fo = drbd_bm_bits(mdev);
mdev->resync_work.cb = w_resync_inactive;
put_ldev(mdev);
return 1;
}
@ -676,7 +657,6 @@ next_sector:
* resync data block, and the last bit is cleared.
* until then resync "work" is "inactive" ...
*/
mdev->resync_work.cb = w_resync_inactive;
put_ldev(mdev);
return 1;
}
@ -697,17 +677,11 @@ static int w_make_ov_request(struct drbd_conf *mdev, struct drbd_work *w, int ca
if (unlikely(cancel))
return 1;
if (unlikely(mdev->state.conn < C_CONNECTED)) {
dev_err(DEV, "Confused in w_make_ov_request()! cstate < Connected");
return 0;
}
number = drbd_rs_number_requests(mdev);
sector = mdev->ov_position;
for (i = 0; i < number; i++) {
if (sector >= capacity) {
mdev->resync_work.cb = w_resync_inactive;
return 1;
}