1 files changed, 22 insertions, 15 deletions

diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 7c081bcbc3cf..9bfd057be686 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -22,8 +22,6 @@
 #define DM_MSG_PREFIX "raid1"
 
 #define MAX_RECOVERY 1  /* Maximum number of regions recovered in parallel. */
-#define DM_IO_PAGES 64
-#define DM_KCOPYD_PAGES 64
 
 #define DM_RAID1_HANDLE_ERRORS 0x01
 #define errors_handled(p)       ((p)->features & DM_RAID1_HANDLE_ERRORS)
@@ -259,9 +257,9 @@ static int mirror_flush(struct dm_target *ti)
         struct dm_io_region io[ms->nr_mirrors];
         struct mirror *m;
         struct dm_io_request io_req = {
-                .bi_rw = WRITE_BARRIER,
+                .bi_rw = WRITE_FLUSH,
                 .mem.type = DM_IO_KMEM,
-                .mem.ptr.bvec = NULL,
+                .mem.ptr.addr = NULL,
                 .client = ms->io_client,
         };
 
@@ -629,7 +627,7 @@ static void do_write(struct mirror_set *ms, struct bio *bio)
         struct dm_io_region io[ms->nr_mirrors], *dest = io;
         struct mirror *m;
         struct dm_io_request io_req = {
-                .bi_rw = WRITE | (bio->bi_rw & WRITE_BARRIER),
+                .bi_rw = WRITE | (bio->bi_rw & WRITE_FLUSH_FUA),
                 .mem.type = DM_IO_BVEC,
                 .mem.ptr.bvec = bio->bi_io_vec + bio->bi_idx,
                 .notify.fn = write_callback,
@@ -637,6 +635,12 @@ static void do_write(struct mirror_set *ms, struct bio *bio)
                 .client = ms->io_client,
         };
 
+        if (bio->bi_rw & REQ_DISCARD) {
+                io_req.bi_rw |= REQ_DISCARD;
+                io_req.mem.type = DM_IO_KMEM;
+                io_req.mem.ptr.addr = NULL;
+        }
+
         for (i = 0, m = ms->mirror; i < ms->nr_mirrors; i++, m++)
                 map_region(dest++, m, bio);
 
@@ -670,7 +674,8 @@ static void do_writes(struct mirror_set *ms, struct bio_list *writes)
         bio_list_init(&requeue);
 
         while ((bio = bio_list_pop(writes))) {
-                if (unlikely(bio_empty_barrier(bio))) {
+                if ((bio->bi_rw & REQ_FLUSH) ||
+                    (bio->bi_rw & REQ_DISCARD)) {
                         bio_list_add(&sync, bio);
                         continue;
                 }
@@ -835,8 +840,6 @@ static void do_mirror(struct work_struct *work)
         do_reads(ms, &reads);
         do_writes(ms, &writes);
         do_failures(ms, &failures);
-
-        dm_table_unplug_all(ms->ti->table);
 }
 
 /*-----------------------------------------------------------------
@@ -882,7 +885,7 @@ static struct mirror_set *alloc_context(unsigned int nr_mirrors,
                 return NULL;
         }
 
-        ms->io_client = dm_io_client_create(DM_IO_PAGES);
+        ms->io_client = dm_io_client_create();
         if (IS_ERR(ms->io_client)) {
                 ti->error = "Error creating dm_io client";
                 mempool_destroy(ms->read_record_pool);
@@ -1076,8 +1079,10 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
         ti->private = ms;
         ti->split_io = dm_rh_get_region_size(ms->rh);
         ti->num_flush_requests = 1;
+        ti->num_discard_requests = 1;
 
-        ms->kmirrord_wq = create_singlethread_workqueue("kmirrord");
+        ms->kmirrord_wq = alloc_workqueue("kmirrord",
+                                          WQ_NON_REENTRANT | WQ_MEM_RECLAIM, 0);
         if (!ms->kmirrord_wq) {
                 DMERR("couldn't start kmirrord");
                 r = -ENOMEM;
@@ -1110,9 +1115,11 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
                 goto err_destroy_wq;
         }
 
-        r = dm_kcopyd_client_create(DM_KCOPYD_PAGES, &ms->kcopyd_client);
-        if (r)
+        ms->kcopyd_client = dm_kcopyd_client_create();
+        if (IS_ERR(ms->kcopyd_client)) {
+                r = PTR_ERR(ms->kcopyd_client);
                 goto err_destroy_wq;
+        }
 
         wakeup_mirrord(ms);
         return 0;
@@ -1130,7 +1137,7 @@ static void mirror_dtr(struct dm_target *ti)
 
         del_timer_sync(&ms->timer);
         flush_workqueue(ms->kmirrord_wq);
-        flush_scheduled_work();
+        flush_work_sync(&ms->trigger_event);
         dm_kcopyd_client_destroy(ms->kcopyd_client);
         destroy_workqueue(ms->kmirrord_wq);
         free_context(ms, ti, ms->nr_mirrors);
@@ -1203,7 +1210,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio,
          * We need to dec pending if this was a write.
          */
         if (rw == WRITE) {
-                if (likely(!bio_empty_barrier(bio)))
+                if (!(bio->bi_rw & REQ_FLUSH))
                         dm_rh_dec(ms->rh, map_context->ll);
                 return error;
         }
@@ -1406,7 +1413,7 @@ static int mirror_iterate_devices(struct dm_target *ti,
 
 static struct target_type mirror_target = {
         .name    = "mirror",
-        .version = {1, 12, 0},
+        .version = {1, 12, 1},
         .module  = THIS_MODULE,
         .ctr     = mirror_ctr,
         .dtr     = mirror_dtr,