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dm kcopyd: update dm io interface 

This patch ports kcopyd.c to the new, scalable dm_io() interface.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Heinz Mauelshagen <hjm@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Milan Broz 2007-05-09 02:33:02 -07:00 committed by Linus Torvalds
parent c8b03afe3d
commit 373a392bd7
1 changed files with 18 additions and 10 deletions
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28
drivers/md/kcopyd.c
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@ -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 error, void *context)
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_pages, struct kcopyd_client **result)
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_client *kc)
/* 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);