dm raid1: update dm io interface

This patch ports dm-raid1.c to the new dm-io interface.

Signed-off-by: Milan Broz <mbroz@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>

1 files changed, 21 insertions, 4 deletions

diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 2a3e2f80aa4b..bde904606099 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -21,6 +21,7 @@
 #include <linux/workqueue.h>
 
 #define DM_MSG_PREFIX "raid1"
+#define DM_IO_PAGES 64
 
 #define DM_RAID1_HANDLE_ERRORS 0x01
 
@@ -126,6 +127,8 @@ struct mirror_set {
         struct bio_list reads;
         struct bio_list writes;
 
+        struct dm_io_client *io_client;
+
         /* recovery */
         region_t nr_regions;
         int in_sync;
@@ -796,6 +799,14 @@ static void do_write(struct mirror_set *ms, struct bio *bio)
         unsigned int i;
         struct io_region io[KCOPYD_MAX_REGIONS+1];
         struct mirror *m;
+        struct dm_io_request io_req = {
+                .bi_rw = WRITE,
+                .mem.type = DM_IO_BVEC,
+                .mem.ptr.bvec = bio->bi_io_vec + bio->bi_idx,
+                .notify.fn = write_callback,
+                .notify.context = bio,
+                .client = ms->io_client,
+        };
 
         for (i = 0; i < ms->nr_mirrors; i++) {
                 m = ms->mirror + i;
@@ -806,9 +817,8 @@ static void do_write(struct mirror_set *ms, struct bio *bio)
         }
 
         bio_set_ms(bio, ms);
-        dm_io_async_bvec(ms->nr_mirrors, io, WRITE,
-                         bio->bi_io_vec + bio->bi_idx,
-                         write_callback, bio);
+
+        (void) dm_io(&io_req, ms->nr_mirrors, io, NULL);
 }
 
 static void do_writes(struct mirror_set *ms, struct bio_list *writes)
@@ -924,6 +934,13 @@ static struct mirror_set *alloc_context(unsigned int nr_mirrors,
         ms->in_sync = 0;
         ms->default_mirror = &ms->mirror[DEFAULT_MIRROR];
 
+        ms->io_client = dm_io_client_create(DM_IO_PAGES);
+        if (IS_ERR(ms->io_client)) {
+                ti->error = "Error creating dm_io client";
+                kfree(ms);
+                return NULL;
+        }
+
         if (rh_init(&ms->rh, ms, dl, region_size, ms->nr_regions)) {
                 ti->error = "Error creating dirty region hash";
                 kfree(ms);
@@ -939,6 +956,7 @@ static void free_context(struct mirror_set *ms, struct dm_target *ti,
         while (m--)
                 dm_put_device(ti, ms->mirror[m].dev);
 
+        dm_io_client_destroy(ms->io_client);
         rh_exit(&ms->rh);
         kfree(ms);
 }
@@ -1062,7 +1080,6 @@ static int parse_features(struct mirror_set *ms, unsigned argc, char **argv,
  *
  * If present, features must be "handle_errors".
  */
-#define DM_IO_PAGES 64
 static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 {
         int r;