From: Milan Broz <[email protected]>
This patch ports kcopyd.c to the new, scalable dm_io() interface.
Signed-off-by: Milan Broz <[email protected]>
Signed-off-by: Heinz Mauelshagen <[email protected]>
Signed-off-by: Alasdair G Kergon <[email protected]>
---
drivers/md/kcopyd.c | 28 ++++++++++++++++++----------
1 files changed, 18 insertions(+), 10 deletions(-)
Index: linux-2.6.21/drivers/md/kcopyd.c
===================================================================
--- linux-2.6.21.orig/drivers/md/kcopyd.c 2007-05-01 17:38:32.000000000 +0100
+++ linux-2.6.21/drivers/md/kcopyd.c 2007-05-01 17:40:53.000000000 +0100
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2002 Sistina Software (UK) Limited.
+ * Copyright (C) 2006 Red Hat GmbH
*
* This file is released under the GPL.
*
@@ -45,6 +46,8 @@ struct kcopyd_client {
unsigned int nr_pages;
unsigned int nr_free_pages;
+ struct dm_io_client *io_client;
+
wait_queue_head_t destroyq;
atomic_t nr_jobs;
};
@@ -342,16 +345,20 @@ static void complete_io(unsigned long er
static int run_io_job(struct kcopyd_job *job)
{
int r;
+ struct dm_io_request io_req = {
+ .bi_rw = job->rw,
+ .mem.type = DM_IO_PAGE_LIST,
+ .mem.ptr.pl = job->pages,
+ .mem.offset = job->offset,
+ .notify.fn = complete_io,
+ .notify.context = job,
+ .client = job->kc->io_client,
+ };
if (job->rw == READ)
- r = dm_io_async(1, &job->source, job->rw,
- job->pages,
- job->offset, complete_io, job);
-
+ r = dm_io(&io_req, 1, &job->source, NULL);
else
- r = dm_io_async(job->num_dests, job->dests, job->rw,
- job->pages,
- job->offset, complete_io, job);
+ r = dm_io(&io_req, job->num_dests, job->dests, NULL);
return r;
}
@@ -670,8 +677,9 @@ int kcopyd_client_create(unsigned int nr
return r;
}
- r = dm_io_get(nr_pages);
- if (r) {
+ kc->io_client = dm_io_client_create(nr_pages);
+ if (IS_ERR(kc->io_client)) {
+ r = PTR_ERR(kc->io_client);
client_free_pages(kc);
kfree(kc);
kcopyd_exit();
@@ -691,7 +699,7 @@ void kcopyd_client_destroy(struct kcopyd
/* Wait for completion of all jobs submitted by this client. */
wait_event(kc->destroyq, !atomic_read(&kc->nr_jobs));
- dm_io_put(kc->nr_pages);
+ dm_io_client_destroy(kc->io_client);
client_free_pages(kc);
client_del(kc);
kfree(kc);
-
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