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path: root/drivers/md/dm-kcopyd.c
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Diffstat (limited to 'drivers/md/dm-kcopyd.c')
-rw-r--r--drivers/md/dm-kcopyd.c44
1 files changed, 35 insertions, 9 deletions
diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c
index 819e37eaaeba..f82147029636 100644
--- a/drivers/md/dm-kcopyd.c
+++ b/drivers/md/dm-kcopyd.c
@@ -10,7 +10,7 @@
*/
#include <linux/types.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
#include <linux/blkdev.h>
#include <linux/fs.h>
#include <linux/init.h>
@@ -224,8 +224,6 @@ struct kcopyd_job {
unsigned int num_dests;
struct dm_io_region dests[DM_KCOPYD_MAX_REGIONS];
- sector_t offset;
- unsigned int nr_pages;
struct page_list *pages;
/*
@@ -380,7 +378,7 @@ static int run_io_job(struct kcopyd_job *job)
.bi_rw = job->rw,
.mem.type = DM_IO_PAGE_LIST,
.mem.ptr.pl = job->pages,
- .mem.offset = job->offset,
+ .mem.offset = 0,
.notify.fn = complete_io,
.notify.context = job,
.client = job->kc->io_client,
@@ -397,10 +395,9 @@ static int run_io_job(struct kcopyd_job *job)
static int run_pages_job(struct kcopyd_job *job)
{
int r;
+ unsigned nr_pages = dm_div_up(job->dests[0].count, PAGE_SIZE >> 9);
- job->nr_pages = dm_div_up(job->dests[0].count + job->offset,
- PAGE_SIZE >> 9);
- r = kcopyd_get_pages(job->kc, job->nr_pages, &job->pages);
+ r = kcopyd_get_pages(job->kc, nr_pages, &job->pages);
if (!r) {
/* this job is ready for io */
push(&job->kc->io_jobs, job);
@@ -602,8 +599,6 @@ int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from,
job->num_dests = num_dests;
memcpy(&job->dests, dests, sizeof(*dests) * num_dests);
- job->offset = 0;
- job->nr_pages = 0;
job->pages = NULL;
job->fn = fn;
@@ -622,6 +617,37 @@ int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from,
}
EXPORT_SYMBOL(dm_kcopyd_copy);
+void *dm_kcopyd_prepare_callback(struct dm_kcopyd_client *kc,
+ dm_kcopyd_notify_fn fn, void *context)
+{
+ struct kcopyd_job *job;
+
+ job = mempool_alloc(kc->job_pool, GFP_NOIO);
+
+ memset(job, 0, sizeof(struct kcopyd_job));
+ job->kc = kc;
+ job->fn = fn;
+ job->context = context;
+
+ atomic_inc(&kc->nr_jobs);
+
+ return job;
+}
+EXPORT_SYMBOL(dm_kcopyd_prepare_callback);
+
+void dm_kcopyd_do_callback(void *j, int read_err, unsigned long write_err)
+{
+ struct kcopyd_job *job = j;
+ struct dm_kcopyd_client *kc = job->kc;
+
+ job->read_err = read_err;
+ job->write_err = write_err;
+
+ push(&kc->complete_jobs, job);
+ wake(kc);
+}
+EXPORT_SYMBOL(dm_kcopyd_do_callback);
+
/*
* Cancels a kcopyd job, eg. someone might be deactivating a
* mirror.